Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Driver for the PLX NET2280 USB device controller. | |
3 | * Specs and errata are available from <http://www.plxtech.com>. | |
4 | * | |
901b3d75 | 5 | * PLX Technology Inc. (formerly NetChip Technology) supported the |
1da177e4 LT |
6 | * development of this driver. |
7 | * | |
8 | * | |
9 | * CODE STATUS HIGHLIGHTS | |
10 | * | |
11 | * This driver should work well with most "gadget" drivers, including | |
fa06920a | 12 | * the Mass Storage, Serial, and Ethernet/RNDIS gadget drivers |
1da177e4 LT |
13 | * as well as Gadget Zero and Gadgetfs. |
14 | * | |
90664198 | 15 | * DMA is enabled by default. |
1da177e4 | 16 | * |
adc82f77 RRD |
17 | * MSI is enabled by default. The legacy IRQ is used if MSI couldn't |
18 | * be enabled. | |
19 | * | |
1da177e4 LT |
20 | * Note that almost all the errata workarounds here are only needed for |
21 | * rev1 chips. Rev1a silicon (0110) fixes almost all of them. | |
22 | */ | |
23 | ||
24 | /* | |
25 | * Copyright (C) 2003 David Brownell | |
26 | * Copyright (C) 2003-2005 PLX Technology, Inc. | |
adc82f77 | 27 | * Copyright (C) 2014 Ricardo Ribalda - Qtechnology/AS |
1da177e4 | 28 | * |
901b3d75 DB |
29 | * Modified Seth Levy 2005 PLX Technology, Inc. to provide compatibility |
30 | * with 2282 chip | |
950ee4c8 | 31 | * |
adc82f77 RRD |
32 | * Modified Ricardo Ribalda Qtechnology AS to provide compatibility |
33 | * with usb 338x chip. Based on PLX driver | |
34 | * | |
1da177e4 LT |
35 | * This program is free software; you can redistribute it and/or modify |
36 | * it under the terms of the GNU General Public License as published by | |
37 | * the Free Software Foundation; either version 2 of the License, or | |
38 | * (at your option) any later version. | |
1da177e4 LT |
39 | */ |
40 | ||
1da177e4 LT |
41 | #include <linux/module.h> |
42 | #include <linux/pci.h> | |
682d4c80 | 43 | #include <linux/dma-mapping.h> |
1da177e4 LT |
44 | #include <linux/kernel.h> |
45 | #include <linux/delay.h> | |
46 | #include <linux/ioport.h> | |
1da177e4 | 47 | #include <linux/slab.h> |
1da177e4 LT |
48 | #include <linux/errno.h> |
49 | #include <linux/init.h> | |
50 | #include <linux/timer.h> | |
51 | #include <linux/list.h> | |
52 | #include <linux/interrupt.h> | |
53 | #include <linux/moduleparam.h> | |
54 | #include <linux/device.h> | |
5f848137 | 55 | #include <linux/usb/ch9.h> |
9454a57a | 56 | #include <linux/usb/gadget.h> |
b38b03b3 | 57 | #include <linux/prefetch.h> |
fae3c158 | 58 | #include <linux/io.h> |
1da177e4 LT |
59 | |
60 | #include <asm/byteorder.h> | |
1da177e4 | 61 | #include <asm/irq.h> |
1da177e4 LT |
62 | #include <asm/unaligned.h> |
63 | ||
adc82f77 RRD |
64 | #define DRIVER_DESC "PLX NET228x/USB338x USB Peripheral Controller" |
65 | #define DRIVER_VERSION "2005 Sept 27/v3.0" | |
1da177e4 | 66 | |
1da177e4 LT |
67 | #define EP_DONTUSE 13 /* nonzero */ |
68 | ||
69 | #define USE_RDK_LEDS /* GPIO pins control three LEDs */ | |
70 | ||
71 | ||
fae3c158 RRD |
72 | static const char driver_name[] = "net2280"; |
73 | static const char driver_desc[] = DRIVER_DESC; | |
1da177e4 | 74 | |
adc82f77 | 75 | static const u32 ep_bit[9] = { 0, 17, 2, 19, 4, 1, 18, 3, 20 }; |
fae3c158 RRD |
76 | static const char ep0name[] = "ep0"; |
77 | static const char *const ep_name[] = { | |
1da177e4 LT |
78 | ep0name, |
79 | "ep-a", "ep-b", "ep-c", "ep-d", | |
adc82f77 | 80 | "ep-e", "ep-f", "ep-g", "ep-h", |
1da177e4 LT |
81 | }; |
82 | ||
1da177e4 LT |
83 | /* mode 0 == ep-{a,b,c,d} 1K fifo each |
84 | * mode 1 == ep-{a,b} 2K fifo each, ep-{c,d} unavailable | |
85 | * mode 2 == ep-a 2K fifo, ep-{b,c} 1K each, ep-d unavailable | |
86 | */ | |
fae3c158 | 87 | static ushort fifo_mode; |
1da177e4 LT |
88 | |
89 | /* "modprobe net2280 fifo_mode=1" etc */ | |
ae8e530a | 90 | module_param(fifo_mode, ushort, 0644); |
1da177e4 LT |
91 | |
92 | /* enable_suspend -- When enabled, the driver will respond to | |
93 | * USB suspend requests by powering down the NET2280. Otherwise, | |
25985edc | 94 | * USB suspend requests will be ignored. This is acceptable for |
950ee4c8 | 95 | * self-powered devices |
1da177e4 | 96 | */ |
00d4db0e | 97 | static bool enable_suspend; |
1da177e4 LT |
98 | |
99 | /* "modprobe net2280 enable_suspend=1" etc */ | |
ae8e530a | 100 | module_param(enable_suspend, bool, 0444); |
1da177e4 | 101 | |
1da177e4 LT |
102 | #define DIR_STRING(bAddress) (((bAddress) & USB_DIR_IN) ? "in" : "out") |
103 | ||
fae3c158 | 104 | static char *type_string(u8 bmAttributes) |
1da177e4 LT |
105 | { |
106 | switch ((bmAttributes) & USB_ENDPOINT_XFERTYPE_MASK) { | |
107 | case USB_ENDPOINT_XFER_BULK: return "bulk"; | |
108 | case USB_ENDPOINT_XFER_ISOC: return "iso"; | |
109 | case USB_ENDPOINT_XFER_INT: return "intr"; | |
2b84f92b | 110 | } |
1da177e4 LT |
111 | return "control"; |
112 | } | |
1da177e4 LT |
113 | |
114 | #include "net2280.h" | |
115 | ||
3e76fdcb RRD |
116 | #define valid_bit cpu_to_le32(BIT(VALID_BIT)) |
117 | #define dma_done_ie cpu_to_le32(BIT(DMA_DONE_INTERRUPT_ENABLE)) | |
1da177e4 LT |
118 | |
119 | /*-------------------------------------------------------------------------*/ | |
adc82f77 RRD |
120 | static inline void enable_pciirqenb(struct net2280_ep *ep) |
121 | { | |
122 | u32 tmp = readl(&ep->dev->regs->pciirqenb0); | |
123 | ||
2eeb0016 | 124 | if (ep->dev->quirks & PLX_LEGACY) |
3e76fdcb | 125 | tmp |= BIT(ep->num); |
adc82f77 | 126 | else |
3e76fdcb | 127 | tmp |= BIT(ep_bit[ep->num]); |
adc82f77 RRD |
128 | writel(tmp, &ep->dev->regs->pciirqenb0); |
129 | ||
130 | return; | |
131 | } | |
1da177e4 LT |
132 | |
133 | static int | |
fae3c158 | 134 | net2280_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) |
1da177e4 LT |
135 | { |
136 | struct net2280 *dev; | |
137 | struct net2280_ep *ep; | |
138 | u32 max, tmp; | |
139 | unsigned long flags; | |
adc82f77 | 140 | static const u32 ep_key[9] = { 1, 0, 1, 0, 1, 1, 0, 1, 0 }; |
1da177e4 | 141 | |
fae3c158 | 142 | ep = container_of(_ep, struct net2280_ep, ep); |
ae8e530a RRD |
143 | if (!_ep || !desc || ep->desc || _ep->name == ep0name || |
144 | desc->bDescriptorType != USB_DT_ENDPOINT) | |
1da177e4 LT |
145 | return -EINVAL; |
146 | dev = ep->dev; | |
147 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) | |
148 | return -ESHUTDOWN; | |
149 | ||
150 | /* erratum 0119 workaround ties up an endpoint number */ | |
151 | if ((desc->bEndpointAddress & 0x0f) == EP_DONTUSE) | |
152 | return -EDOM; | |
153 | ||
2eeb0016 | 154 | if (dev->quirks & PLX_SUPERSPEED) { |
adc82f77 RRD |
155 | if ((desc->bEndpointAddress & 0x0f) >= 0x0c) |
156 | return -EDOM; | |
157 | ep->is_in = !!usb_endpoint_dir_in(desc); | |
158 | if (dev->enhanced_mode && ep->is_in && ep_key[ep->num]) | |
159 | return -EINVAL; | |
160 | } | |
161 | ||
1da177e4 | 162 | /* sanity check ep-e/ep-f since their fifos are small */ |
fae3c158 | 163 | max = usb_endpoint_maxp(desc) & 0x1fff; |
2eeb0016 | 164 | if (ep->num > 4 && max > 64 && (dev->quirks & PLX_LEGACY)) |
1da177e4 LT |
165 | return -ERANGE; |
166 | ||
fae3c158 | 167 | spin_lock_irqsave(&dev->lock, flags); |
1da177e4 LT |
168 | _ep->maxpacket = max & 0x7ff; |
169 | ep->desc = desc; | |
170 | ||
171 | /* ep_reset() has already been called */ | |
172 | ep->stopped = 0; | |
8066134f | 173 | ep->wedged = 0; |
1da177e4 LT |
174 | ep->out_overflow = 0; |
175 | ||
176 | /* set speed-dependent max packet; may kick in high bandwidth */ | |
adc82f77 | 177 | set_max_speed(ep, max); |
1da177e4 | 178 | |
1da177e4 | 179 | /* set type, direction, address; reset fifo counters */ |
3e76fdcb | 180 | writel(BIT(FIFO_FLUSH), &ep->regs->ep_stat); |
1da177e4 LT |
181 | tmp = (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK); |
182 | if (tmp == USB_ENDPOINT_XFER_INT) { | |
183 | /* erratum 0105 workaround prevents hs NYET */ | |
ae8e530a RRD |
184 | if (dev->chiprev == 0100 && |
185 | dev->gadget.speed == USB_SPEED_HIGH && | |
186 | !(desc->bEndpointAddress & USB_DIR_IN)) | |
3e76fdcb | 187 | writel(BIT(CLEAR_NAK_OUT_PACKETS_MODE), |
1da177e4 LT |
188 | &ep->regs->ep_rsp); |
189 | } else if (tmp == USB_ENDPOINT_XFER_BULK) { | |
190 | /* catch some particularly blatant driver bugs */ | |
adc82f77 RRD |
191 | if ((dev->gadget.speed == USB_SPEED_SUPER && max != 1024) || |
192 | (dev->gadget.speed == USB_SPEED_HIGH && max != 512) || | |
193 | (dev->gadget.speed == USB_SPEED_FULL && max > 64)) { | |
194 | spin_unlock_irqrestore(&dev->lock, flags); | |
1da177e4 LT |
195 | return -ERANGE; |
196 | } | |
197 | } | |
fae3c158 | 198 | ep->is_iso = (tmp == USB_ENDPOINT_XFER_ISOC); |
adc82f77 | 199 | /* Enable this endpoint */ |
2eeb0016 | 200 | if (dev->quirks & PLX_LEGACY) { |
adc82f77 RRD |
201 | tmp <<= ENDPOINT_TYPE; |
202 | tmp |= desc->bEndpointAddress; | |
203 | /* default full fifo lines */ | |
204 | tmp |= (4 << ENDPOINT_BYTE_COUNT); | |
3e76fdcb | 205 | tmp |= BIT(ENDPOINT_ENABLE); |
adc82f77 RRD |
206 | ep->is_in = (tmp & USB_DIR_IN) != 0; |
207 | } else { | |
208 | /* In Legacy mode, only OUT endpoints are used */ | |
209 | if (dev->enhanced_mode && ep->is_in) { | |
210 | tmp <<= IN_ENDPOINT_TYPE; | |
3e76fdcb | 211 | tmp |= BIT(IN_ENDPOINT_ENABLE); |
adc82f77 | 212 | /* Not applicable to Legacy */ |
3e76fdcb | 213 | tmp |= BIT(ENDPOINT_DIRECTION); |
adc82f77 RRD |
214 | } else { |
215 | tmp <<= OUT_ENDPOINT_TYPE; | |
3e76fdcb | 216 | tmp |= BIT(OUT_ENDPOINT_ENABLE); |
adc82f77 RRD |
217 | tmp |= (ep->is_in << ENDPOINT_DIRECTION); |
218 | } | |
219 | ||
220 | tmp |= usb_endpoint_num(desc); | |
221 | tmp |= (ep->ep.maxburst << MAX_BURST_SIZE); | |
222 | } | |
223 | ||
224 | /* Make sure all the registers are written before ep_rsp*/ | |
225 | wmb(); | |
1da177e4 LT |
226 | |
227 | /* for OUT transfers, block the rx fifo until a read is posted */ | |
1da177e4 | 228 | if (!ep->is_in) |
3e76fdcb | 229 | writel(BIT(SET_NAK_OUT_PACKETS), &ep->regs->ep_rsp); |
2eeb0016 | 230 | else if (!(dev->quirks & PLX_2280)) { |
901b3d75 DB |
231 | /* Added for 2282, Don't use nak packets on an in endpoint, |
232 | * this was ignored on 2280 | |
233 | */ | |
3e76fdcb RRD |
234 | writel(BIT(CLEAR_NAK_OUT_PACKETS) | |
235 | BIT(CLEAR_NAK_OUT_PACKETS_MODE), &ep->regs->ep_rsp); | |
950ee4c8 | 236 | } |
1da177e4 | 237 | |
adc82f77 | 238 | writel(tmp, &ep->cfg->ep_cfg); |
1da177e4 LT |
239 | |
240 | /* enable irqs */ | |
241 | if (!ep->dma) { /* pio, per-packet */ | |
adc82f77 | 242 | enable_pciirqenb(ep); |
1da177e4 | 243 | |
3e76fdcb RRD |
244 | tmp = BIT(DATA_PACKET_RECEIVED_INTERRUPT_ENABLE) | |
245 | BIT(DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE); | |
2eeb0016 | 246 | if (dev->quirks & PLX_2280) |
fae3c158 RRD |
247 | tmp |= readl(&ep->regs->ep_irqenb); |
248 | writel(tmp, &ep->regs->ep_irqenb); | |
1da177e4 | 249 | } else { /* dma, per-request */ |
3e76fdcb | 250 | tmp = BIT((8 + ep->num)); /* completion */ |
fae3c158 RRD |
251 | tmp |= readl(&dev->regs->pciirqenb1); |
252 | writel(tmp, &dev->regs->pciirqenb1); | |
1da177e4 LT |
253 | |
254 | /* for short OUT transfers, dma completions can't | |
255 | * advance the queue; do it pio-style, by hand. | |
256 | * NOTE erratum 0112 workaround #2 | |
257 | */ | |
258 | if ((desc->bEndpointAddress & USB_DIR_IN) == 0) { | |
3e76fdcb | 259 | tmp = BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT_ENABLE); |
fae3c158 | 260 | writel(tmp, &ep->regs->ep_irqenb); |
1da177e4 | 261 | |
adc82f77 | 262 | enable_pciirqenb(ep); |
1da177e4 LT |
263 | } |
264 | } | |
265 | ||
266 | tmp = desc->bEndpointAddress; | |
e56e69cc | 267 | ep_dbg(dev, "enabled %s (ep%d%s-%s) %s max %04x\n", |
fae3c158 RRD |
268 | _ep->name, tmp & 0x0f, DIR_STRING(tmp), |
269 | type_string(desc->bmAttributes), | |
1da177e4 LT |
270 | ep->dma ? "dma" : "pio", max); |
271 | ||
272 | /* pci writes may still be posted */ | |
fae3c158 | 273 | spin_unlock_irqrestore(&dev->lock, flags); |
1da177e4 LT |
274 | return 0; |
275 | } | |
276 | ||
fae3c158 | 277 | static int handshake(u32 __iomem *ptr, u32 mask, u32 done, int usec) |
1da177e4 LT |
278 | { |
279 | u32 result; | |
280 | ||
281 | do { | |
fae3c158 | 282 | result = readl(ptr); |
1da177e4 LT |
283 | if (result == ~(u32)0) /* "device unplugged" */ |
284 | return -ENODEV; | |
285 | result &= mask; | |
286 | if (result == done) | |
287 | return 0; | |
fae3c158 | 288 | udelay(1); |
1da177e4 LT |
289 | usec--; |
290 | } while (usec > 0); | |
291 | return -ETIMEDOUT; | |
292 | } | |
293 | ||
901b3d75 | 294 | static const struct usb_ep_ops net2280_ep_ops; |
1da177e4 | 295 | |
adc82f77 RRD |
296 | static void ep_reset_228x(struct net2280_regs __iomem *regs, |
297 | struct net2280_ep *ep) | |
1da177e4 LT |
298 | { |
299 | u32 tmp; | |
300 | ||
301 | ep->desc = NULL; | |
fae3c158 | 302 | INIT_LIST_HEAD(&ep->queue); |
1da177e4 | 303 | |
e117e742 | 304 | usb_ep_set_maxpacket_limit(&ep->ep, ~0); |
1da177e4 LT |
305 | ep->ep.ops = &net2280_ep_ops; |
306 | ||
307 | /* disable the dma, irqs, endpoint... */ | |
308 | if (ep->dma) { | |
fae3c158 | 309 | writel(0, &ep->dma->dmactl); |
3e76fdcb RRD |
310 | writel(BIT(DMA_SCATTER_GATHER_DONE_INTERRUPT) | |
311 | BIT(DMA_TRANSACTION_DONE_INTERRUPT) | | |
312 | BIT(DMA_ABORT), | |
313 | &ep->dma->dmastat); | |
1da177e4 | 314 | |
fae3c158 | 315 | tmp = readl(®s->pciirqenb0); |
3e76fdcb | 316 | tmp &= ~BIT(ep->num); |
fae3c158 | 317 | writel(tmp, ®s->pciirqenb0); |
1da177e4 | 318 | } else { |
fae3c158 | 319 | tmp = readl(®s->pciirqenb1); |
3e76fdcb | 320 | tmp &= ~BIT((8 + ep->num)); /* completion */ |
fae3c158 | 321 | writel(tmp, ®s->pciirqenb1); |
1da177e4 | 322 | } |
fae3c158 | 323 | writel(0, &ep->regs->ep_irqenb); |
1da177e4 LT |
324 | |
325 | /* init to our chosen defaults, notably so that we NAK OUT | |
326 | * packets until the driver queues a read (+note erratum 0112) | |
327 | */ | |
2eeb0016 | 328 | if (!ep->is_in || (ep->dev->quirks & PLX_2280)) { |
3e76fdcb RRD |
329 | tmp = BIT(SET_NAK_OUT_PACKETS_MODE) | |
330 | BIT(SET_NAK_OUT_PACKETS) | | |
331 | BIT(CLEAR_EP_HIDE_STATUS_PHASE) | | |
332 | BIT(CLEAR_INTERRUPT_MODE); | |
950ee4c8 GL |
333 | } else { |
334 | /* added for 2282 */ | |
3e76fdcb RRD |
335 | tmp = BIT(CLEAR_NAK_OUT_PACKETS_MODE) | |
336 | BIT(CLEAR_NAK_OUT_PACKETS) | | |
337 | BIT(CLEAR_EP_HIDE_STATUS_PHASE) | | |
338 | BIT(CLEAR_INTERRUPT_MODE); | |
950ee4c8 | 339 | } |
1da177e4 LT |
340 | |
341 | if (ep->num != 0) { | |
3e76fdcb RRD |
342 | tmp |= BIT(CLEAR_ENDPOINT_TOGGLE) | |
343 | BIT(CLEAR_ENDPOINT_HALT); | |
1da177e4 | 344 | } |
fae3c158 | 345 | writel(tmp, &ep->regs->ep_rsp); |
1da177e4 LT |
346 | |
347 | /* scrub most status bits, and flush any fifo state */ | |
2eeb0016 | 348 | if (ep->dev->quirks & PLX_2280) |
3e76fdcb RRD |
349 | tmp = BIT(FIFO_OVERFLOW) | |
350 | BIT(FIFO_UNDERFLOW); | |
950ee4c8 GL |
351 | else |
352 | tmp = 0; | |
353 | ||
3e76fdcb RRD |
354 | writel(tmp | BIT(TIMEOUT) | |
355 | BIT(USB_STALL_SENT) | | |
356 | BIT(USB_IN_NAK_SENT) | | |
357 | BIT(USB_IN_ACK_RCVD) | | |
358 | BIT(USB_OUT_PING_NAK_SENT) | | |
359 | BIT(USB_OUT_ACK_SENT) | | |
360 | BIT(FIFO_FLUSH) | | |
361 | BIT(SHORT_PACKET_OUT_DONE_INTERRUPT) | | |
362 | BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT) | | |
363 | BIT(DATA_PACKET_RECEIVED_INTERRUPT) | | |
364 | BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) | | |
365 | BIT(DATA_OUT_PING_TOKEN_INTERRUPT) | | |
ae8e530a RRD |
366 | BIT(DATA_IN_TOKEN_INTERRUPT), |
367 | &ep->regs->ep_stat); | |
1da177e4 LT |
368 | |
369 | /* fifo size is handled separately */ | |
370 | } | |
371 | ||
adc82f77 RRD |
372 | static void ep_reset_338x(struct net2280_regs __iomem *regs, |
373 | struct net2280_ep *ep) | |
374 | { | |
375 | u32 tmp, dmastat; | |
376 | ||
377 | ep->desc = NULL; | |
378 | INIT_LIST_HEAD(&ep->queue); | |
379 | ||
380 | usb_ep_set_maxpacket_limit(&ep->ep, ~0); | |
381 | ep->ep.ops = &net2280_ep_ops; | |
382 | ||
383 | /* disable the dma, irqs, endpoint... */ | |
384 | if (ep->dma) { | |
385 | writel(0, &ep->dma->dmactl); | |
3e76fdcb RRD |
386 | writel(BIT(DMA_ABORT_DONE_INTERRUPT) | |
387 | BIT(DMA_PAUSE_DONE_INTERRUPT) | | |
388 | BIT(DMA_SCATTER_GATHER_DONE_INTERRUPT) | | |
ae8e530a RRD |
389 | BIT(DMA_TRANSACTION_DONE_INTERRUPT), |
390 | /* | BIT(DMA_ABORT), */ | |
391 | &ep->dma->dmastat); | |
adc82f77 RRD |
392 | |
393 | dmastat = readl(&ep->dma->dmastat); | |
394 | if (dmastat == 0x5002) { | |
e56e69cc | 395 | ep_warn(ep->dev, "The dmastat return = %x!!\n", |
adc82f77 RRD |
396 | dmastat); |
397 | writel(0x5a, &ep->dma->dmastat); | |
398 | } | |
399 | ||
400 | tmp = readl(®s->pciirqenb0); | |
3e76fdcb | 401 | tmp &= ~BIT(ep_bit[ep->num]); |
adc82f77 RRD |
402 | writel(tmp, ®s->pciirqenb0); |
403 | } else { | |
404 | if (ep->num < 5) { | |
405 | tmp = readl(®s->pciirqenb1); | |
3e76fdcb | 406 | tmp &= ~BIT((8 + ep->num)); /* completion */ |
adc82f77 RRD |
407 | writel(tmp, ®s->pciirqenb1); |
408 | } | |
409 | } | |
410 | writel(0, &ep->regs->ep_irqenb); | |
411 | ||
3e76fdcb RRD |
412 | writel(BIT(SHORT_PACKET_OUT_DONE_INTERRUPT) | |
413 | BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT) | | |
414 | BIT(FIFO_OVERFLOW) | | |
415 | BIT(DATA_PACKET_RECEIVED_INTERRUPT) | | |
416 | BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) | | |
417 | BIT(DATA_OUT_PING_TOKEN_INTERRUPT) | | |
418 | BIT(DATA_IN_TOKEN_INTERRUPT), &ep->regs->ep_stat); | |
adc82f77 RRD |
419 | } |
420 | ||
fae3c158 | 421 | static void nuke(struct net2280_ep *); |
1da177e4 | 422 | |
fae3c158 | 423 | static int net2280_disable(struct usb_ep *_ep) |
1da177e4 LT |
424 | { |
425 | struct net2280_ep *ep; | |
426 | unsigned long flags; | |
427 | ||
fae3c158 | 428 | ep = container_of(_ep, struct net2280_ep, ep); |
1da177e4 LT |
429 | if (!_ep || !ep->desc || _ep->name == ep0name) |
430 | return -EINVAL; | |
431 | ||
fae3c158 RRD |
432 | spin_lock_irqsave(&ep->dev->lock, flags); |
433 | nuke(ep); | |
adc82f77 | 434 | |
2eeb0016 | 435 | if (ep->dev->quirks & PLX_SUPERSPEED) |
adc82f77 RRD |
436 | ep_reset_338x(ep->dev->regs, ep); |
437 | else | |
438 | ep_reset_228x(ep->dev->regs, ep); | |
1da177e4 | 439 | |
e56e69cc | 440 | ep_vdbg(ep->dev, "disabled %s %s\n", |
1da177e4 LT |
441 | ep->dma ? "dma" : "pio", _ep->name); |
442 | ||
443 | /* synch memory views with the device */ | |
adc82f77 | 444 | (void)readl(&ep->cfg->ep_cfg); |
1da177e4 | 445 | |
d588ff58 | 446 | if (!ep->dma && ep->num >= 1 && ep->num <= 4) |
fae3c158 | 447 | ep->dma = &ep->dev->dma[ep->num - 1]; |
1da177e4 | 448 | |
fae3c158 | 449 | spin_unlock_irqrestore(&ep->dev->lock, flags); |
1da177e4 LT |
450 | return 0; |
451 | } | |
452 | ||
453 | /*-------------------------------------------------------------------------*/ | |
454 | ||
fae3c158 RRD |
455 | static struct usb_request |
456 | *net2280_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) | |
1da177e4 LT |
457 | { |
458 | struct net2280_ep *ep; | |
459 | struct net2280_request *req; | |
460 | ||
461 | if (!_ep) | |
462 | return NULL; | |
fae3c158 | 463 | ep = container_of(_ep, struct net2280_ep, ep); |
1da177e4 | 464 | |
7039f422 | 465 | req = kzalloc(sizeof(*req), gfp_flags); |
1da177e4 LT |
466 | if (!req) |
467 | return NULL; | |
468 | ||
fae3c158 | 469 | INIT_LIST_HEAD(&req->queue); |
1da177e4 LT |
470 | |
471 | /* this dma descriptor may be swapped with the previous dummy */ | |
472 | if (ep->dma) { | |
473 | struct net2280_dma *td; | |
474 | ||
fae3c158 | 475 | td = pci_pool_alloc(ep->dev->requests, gfp_flags, |
1da177e4 LT |
476 | &req->td_dma); |
477 | if (!td) { | |
fae3c158 | 478 | kfree(req); |
1da177e4 LT |
479 | return NULL; |
480 | } | |
481 | td->dmacount = 0; /* not VALID */ | |
1da177e4 LT |
482 | td->dmadesc = td->dmaaddr; |
483 | req->td = td; | |
484 | } | |
485 | return &req->req; | |
486 | } | |
487 | ||
fae3c158 | 488 | static void net2280_free_request(struct usb_ep *_ep, struct usb_request *_req) |
1da177e4 LT |
489 | { |
490 | struct net2280_ep *ep; | |
491 | struct net2280_request *req; | |
492 | ||
fae3c158 | 493 | ep = container_of(_ep, struct net2280_ep, ep); |
1da177e4 LT |
494 | if (!_ep || !_req) |
495 | return; | |
496 | ||
fae3c158 RRD |
497 | req = container_of(_req, struct net2280_request, req); |
498 | WARN_ON(!list_empty(&req->queue)); | |
1da177e4 | 499 | if (req->td) |
fae3c158 RRD |
500 | pci_pool_free(ep->dev->requests, req->td, req->td_dma); |
501 | kfree(req); | |
1da177e4 LT |
502 | } |
503 | ||
504 | /*-------------------------------------------------------------------------*/ | |
505 | ||
1da177e4 LT |
506 | /* load a packet into the fifo we use for usb IN transfers. |
507 | * works for all endpoints. | |
508 | * | |
509 | * NOTE: pio with ep-a..ep-d could stuff multiple packets into the fifo | |
510 | * at a time, but this code is simpler because it knows it only writes | |
511 | * one packet. ep-a..ep-d should use dma instead. | |
512 | */ | |
fae3c158 | 513 | static void write_fifo(struct net2280_ep *ep, struct usb_request *req) |
1da177e4 LT |
514 | { |
515 | struct net2280_ep_regs __iomem *regs = ep->regs; | |
516 | u8 *buf; | |
517 | u32 tmp; | |
518 | unsigned count, total; | |
519 | ||
520 | /* INVARIANT: fifo is currently empty. (testable) */ | |
521 | ||
522 | if (req) { | |
523 | buf = req->buf + req->actual; | |
fae3c158 | 524 | prefetch(buf); |
1da177e4 LT |
525 | total = req->length - req->actual; |
526 | } else { | |
527 | total = 0; | |
528 | buf = NULL; | |
529 | } | |
530 | ||
531 | /* write just one packet at a time */ | |
532 | count = ep->ep.maxpacket; | |
533 | if (count > total) /* min() cannot be used on a bitfield */ | |
534 | count = total; | |
535 | ||
e56e69cc | 536 | ep_vdbg(ep->dev, "write %s fifo (IN) %d bytes%s req %p\n", |
1da177e4 LT |
537 | ep->ep.name, count, |
538 | (count != ep->ep.maxpacket) ? " (short)" : "", | |
539 | req); | |
540 | while (count >= 4) { | |
541 | /* NOTE be careful if you try to align these. fifo lines | |
542 | * should normally be full (4 bytes) and successive partial | |
543 | * lines are ok only in certain cases. | |
544 | */ | |
fae3c158 RRD |
545 | tmp = get_unaligned((u32 *)buf); |
546 | cpu_to_le32s(&tmp); | |
547 | writel(tmp, ®s->ep_data); | |
1da177e4 LT |
548 | buf += 4; |
549 | count -= 4; | |
550 | } | |
551 | ||
552 | /* last fifo entry is "short" unless we wrote a full packet. | |
553 | * also explicitly validate last word in (periodic) transfers | |
554 | * when maxpacket is not a multiple of 4 bytes. | |
555 | */ | |
556 | if (count || total < ep->ep.maxpacket) { | |
fae3c158 RRD |
557 | tmp = count ? get_unaligned((u32 *)buf) : count; |
558 | cpu_to_le32s(&tmp); | |
559 | set_fifo_bytecount(ep, count & 0x03); | |
560 | writel(tmp, ®s->ep_data); | |
1da177e4 LT |
561 | } |
562 | ||
563 | /* pci writes may still be posted */ | |
564 | } | |
565 | ||
566 | /* work around erratum 0106: PCI and USB race over the OUT fifo. | |
567 | * caller guarantees chiprev 0100, out endpoint is NAKing, and | |
568 | * there's no real data in the fifo. | |
569 | * | |
570 | * NOTE: also used in cases where that erratum doesn't apply: | |
571 | * where the host wrote "too much" data to us. | |
572 | */ | |
fae3c158 | 573 | static void out_flush(struct net2280_ep *ep) |
1da177e4 LT |
574 | { |
575 | u32 __iomem *statp; | |
576 | u32 tmp; | |
577 | ||
fae3c158 | 578 | ASSERT_OUT_NAKING(ep); |
1da177e4 LT |
579 | |
580 | statp = &ep->regs->ep_stat; | |
3e76fdcb | 581 | writel(BIT(DATA_OUT_PING_TOKEN_INTERRUPT) | |
ae8e530a RRD |
582 | BIT(DATA_PACKET_RECEIVED_INTERRUPT), |
583 | statp); | |
3e76fdcb | 584 | writel(BIT(FIFO_FLUSH), statp); |
fae3c158 RRD |
585 | /* Make sure that stap is written */ |
586 | mb(); | |
587 | tmp = readl(statp); | |
ae8e530a | 588 | if (tmp & BIT(DATA_OUT_PING_TOKEN_INTERRUPT) && |
1da177e4 | 589 | /* high speed did bulk NYET; fifo isn't filling */ |
ae8e530a | 590 | ep->dev->gadget.speed == USB_SPEED_FULL) { |
1da177e4 LT |
591 | unsigned usec; |
592 | ||
593 | usec = 50; /* 64 byte bulk/interrupt */ | |
3e76fdcb RRD |
594 | handshake(statp, BIT(USB_OUT_PING_NAK_SENT), |
595 | BIT(USB_OUT_PING_NAK_SENT), usec); | |
1da177e4 LT |
596 | /* NAK done; now CLEAR_NAK_OUT_PACKETS is safe */ |
597 | } | |
598 | } | |
599 | ||
600 | /* unload packet(s) from the fifo we use for usb OUT transfers. | |
601 | * returns true iff the request completed, because of short packet | |
602 | * or the request buffer having filled with full packets. | |
603 | * | |
604 | * for ep-a..ep-d this will read multiple packets out when they | |
605 | * have been accepted. | |
606 | */ | |
fae3c158 | 607 | static int read_fifo(struct net2280_ep *ep, struct net2280_request *req) |
1da177e4 LT |
608 | { |
609 | struct net2280_ep_regs __iomem *regs = ep->regs; | |
610 | u8 *buf = req->req.buf + req->req.actual; | |
611 | unsigned count, tmp, is_short; | |
612 | unsigned cleanup = 0, prevent = 0; | |
613 | ||
614 | /* erratum 0106 ... packets coming in during fifo reads might | |
615 | * be incompletely rejected. not all cases have workarounds. | |
616 | */ | |
ae8e530a RRD |
617 | if (ep->dev->chiprev == 0x0100 && |
618 | ep->dev->gadget.speed == USB_SPEED_FULL) { | |
fae3c158 RRD |
619 | udelay(1); |
620 | tmp = readl(&ep->regs->ep_stat); | |
3e76fdcb | 621 | if ((tmp & BIT(NAK_OUT_PACKETS))) |
1da177e4 | 622 | cleanup = 1; |
3e76fdcb | 623 | else if ((tmp & BIT(FIFO_FULL))) { |
fae3c158 | 624 | start_out_naking(ep); |
1da177e4 LT |
625 | prevent = 1; |
626 | } | |
627 | /* else: hope we don't see the problem */ | |
628 | } | |
629 | ||
630 | /* never overflow the rx buffer. the fifo reads packets until | |
631 | * it sees a short one; we might not be ready for them all. | |
632 | */ | |
fae3c158 RRD |
633 | prefetchw(buf); |
634 | count = readl(®s->ep_avail); | |
635 | if (unlikely(count == 0)) { | |
636 | udelay(1); | |
637 | tmp = readl(&ep->regs->ep_stat); | |
638 | count = readl(®s->ep_avail); | |
1da177e4 | 639 | /* handled that data already? */ |
3e76fdcb | 640 | if (count == 0 && (tmp & BIT(NAK_OUT_PACKETS)) == 0) |
1da177e4 LT |
641 | return 0; |
642 | } | |
643 | ||
644 | tmp = req->req.length - req->req.actual; | |
645 | if (count > tmp) { | |
646 | /* as with DMA, data overflow gets flushed */ | |
647 | if ((tmp % ep->ep.maxpacket) != 0) { | |
e56e69cc | 648 | ep_err(ep->dev, |
1da177e4 LT |
649 | "%s out fifo %d bytes, expected %d\n", |
650 | ep->ep.name, count, tmp); | |
651 | req->req.status = -EOVERFLOW; | |
652 | cleanup = 1; | |
653 | /* NAK_OUT_PACKETS will be set, so flushing is safe; | |
654 | * the next read will start with the next packet | |
655 | */ | |
656 | } /* else it's a ZLP, no worries */ | |
657 | count = tmp; | |
658 | } | |
659 | req->req.actual += count; | |
660 | ||
661 | is_short = (count == 0) || ((count % ep->ep.maxpacket) != 0); | |
662 | ||
e56e69cc | 663 | ep_vdbg(ep->dev, "read %s fifo (OUT) %d bytes%s%s%s req %p %d/%d\n", |
1da177e4 LT |
664 | ep->ep.name, count, is_short ? " (short)" : "", |
665 | cleanup ? " flush" : "", prevent ? " nak" : "", | |
666 | req, req->req.actual, req->req.length); | |
667 | ||
668 | while (count >= 4) { | |
fae3c158 RRD |
669 | tmp = readl(®s->ep_data); |
670 | cpu_to_le32s(&tmp); | |
671 | put_unaligned(tmp, (u32 *)buf); | |
1da177e4 LT |
672 | buf += 4; |
673 | count -= 4; | |
674 | } | |
675 | if (count) { | |
fae3c158 | 676 | tmp = readl(®s->ep_data); |
1da177e4 LT |
677 | /* LE conversion is implicit here: */ |
678 | do { | |
679 | *buf++ = (u8) tmp; | |
680 | tmp >>= 8; | |
681 | } while (--count); | |
682 | } | |
683 | if (cleanup) | |
fae3c158 | 684 | out_flush(ep); |
1da177e4 | 685 | if (prevent) { |
3e76fdcb | 686 | writel(BIT(CLEAR_NAK_OUT_PACKETS), &ep->regs->ep_rsp); |
fae3c158 | 687 | (void) readl(&ep->regs->ep_rsp); |
1da177e4 LT |
688 | } |
689 | ||
ae8e530a RRD |
690 | return is_short || ((req->req.actual == req->req.length) && |
691 | !req->req.zero); | |
1da177e4 LT |
692 | } |
693 | ||
694 | /* fill out dma descriptor to match a given request */ | |
fae3c158 RRD |
695 | static void fill_dma_desc(struct net2280_ep *ep, |
696 | struct net2280_request *req, int valid) | |
1da177e4 LT |
697 | { |
698 | struct net2280_dma *td = req->td; | |
699 | u32 dmacount = req->req.length; | |
700 | ||
701 | /* don't let DMA continue after a short OUT packet, | |
702 | * so overruns can't affect the next transfer. | |
703 | * in case of overruns on max-size packets, we can't | |
704 | * stop the fifo from filling but we can flush it. | |
705 | */ | |
706 | if (ep->is_in) | |
3e76fdcb | 707 | dmacount |= BIT(DMA_DIRECTION); |
ae8e530a | 708 | if ((!ep->is_in && (dmacount % ep->ep.maxpacket) != 0) || |
2eeb0016 | 709 | !(ep->dev->quirks & PLX_2280)) |
3e76fdcb | 710 | dmacount |= BIT(END_OF_CHAIN); |
1da177e4 LT |
711 | |
712 | req->valid = valid; | |
713 | if (valid) | |
3e76fdcb | 714 | dmacount |= BIT(VALID_BIT); |
90664198 | 715 | dmacount |= BIT(DMA_DONE_INTERRUPT_ENABLE); |
1da177e4 LT |
716 | |
717 | /* td->dmadesc = previously set by caller */ | |
718 | td->dmaaddr = cpu_to_le32 (req->req.dma); | |
719 | ||
720 | /* 2280 may be polling VALID_BIT through ep->dma->dmadesc */ | |
fae3c158 | 721 | wmb(); |
da2bbdcc | 722 | td->dmacount = cpu_to_le32(dmacount); |
1da177e4 LT |
723 | } |
724 | ||
725 | static const u32 dmactl_default = | |
3e76fdcb RRD |
726 | BIT(DMA_SCATTER_GATHER_DONE_INTERRUPT) | |
727 | BIT(DMA_CLEAR_COUNT_ENABLE) | | |
1da177e4 | 728 | /* erratum 0116 workaround part 1 (use POLLING) */ |
3e76fdcb RRD |
729 | (POLL_100_USEC << DESCRIPTOR_POLLING_RATE) | |
730 | BIT(DMA_VALID_BIT_POLLING_ENABLE) | | |
731 | BIT(DMA_VALID_BIT_ENABLE) | | |
732 | BIT(DMA_SCATTER_GATHER_ENABLE) | | |
1da177e4 | 733 | /* erratum 0116 workaround part 2 (no AUTOSTART) */ |
3e76fdcb | 734 | BIT(DMA_ENABLE); |
1da177e4 | 735 | |
fae3c158 | 736 | static inline void spin_stop_dma(struct net2280_dma_regs __iomem *dma) |
1da177e4 | 737 | { |
3e76fdcb | 738 | handshake(&dma->dmactl, BIT(DMA_ENABLE), 0, 50); |
1da177e4 LT |
739 | } |
740 | ||
fae3c158 | 741 | static inline void stop_dma(struct net2280_dma_regs __iomem *dma) |
1da177e4 | 742 | { |
3e76fdcb | 743 | writel(readl(&dma->dmactl) & ~BIT(DMA_ENABLE), &dma->dmactl); |
fae3c158 | 744 | spin_stop_dma(dma); |
1da177e4 LT |
745 | } |
746 | ||
fae3c158 | 747 | static void start_queue(struct net2280_ep *ep, u32 dmactl, u32 td_dma) |
1da177e4 LT |
748 | { |
749 | struct net2280_dma_regs __iomem *dma = ep->dma; | |
3e76fdcb | 750 | unsigned int tmp = BIT(VALID_BIT) | (ep->is_in << DMA_DIRECTION); |
1da177e4 | 751 | |
2eeb0016 | 752 | if (!(ep->dev->quirks & PLX_2280)) |
3e76fdcb | 753 | tmp |= BIT(END_OF_CHAIN); |
950ee4c8 | 754 | |
fae3c158 RRD |
755 | writel(tmp, &dma->dmacount); |
756 | writel(readl(&dma->dmastat), &dma->dmastat); | |
1da177e4 | 757 | |
fae3c158 | 758 | writel(td_dma, &dma->dmadesc); |
2eeb0016 | 759 | if (ep->dev->quirks & PLX_SUPERSPEED) |
3e76fdcb | 760 | dmactl |= BIT(DMA_REQUEST_OUTSTANDING); |
fae3c158 | 761 | writel(dmactl, &dma->dmactl); |
1da177e4 LT |
762 | |
763 | /* erratum 0116 workaround part 3: pci arbiter away from net2280 */ | |
fae3c158 | 764 | (void) readl(&ep->dev->pci->pcimstctl); |
1da177e4 | 765 | |
3e76fdcb | 766 | writel(BIT(DMA_START), &dma->dmastat); |
1da177e4 LT |
767 | |
768 | if (!ep->is_in) | |
fae3c158 | 769 | stop_out_naking(ep); |
1da177e4 LT |
770 | } |
771 | ||
fae3c158 | 772 | static void start_dma(struct net2280_ep *ep, struct net2280_request *req) |
1da177e4 LT |
773 | { |
774 | u32 tmp; | |
775 | struct net2280_dma_regs __iomem *dma = ep->dma; | |
776 | ||
777 | /* FIXME can't use DMA for ZLPs */ | |
778 | ||
779 | /* on this path we "know" there's no dma active (yet) */ | |
3e76fdcb | 780 | WARN_ON(readl(&dma->dmactl) & BIT(DMA_ENABLE)); |
fae3c158 | 781 | writel(0, &ep->dma->dmactl); |
1da177e4 LT |
782 | |
783 | /* previous OUT packet might have been short */ | |
fae3c158 RRD |
784 | if (!ep->is_in && (readl(&ep->regs->ep_stat) & |
785 | BIT(NAK_OUT_PACKETS))) { | |
3e76fdcb | 786 | writel(BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT), |
1da177e4 LT |
787 | &ep->regs->ep_stat); |
788 | ||
fae3c158 | 789 | tmp = readl(&ep->regs->ep_avail); |
1da177e4 | 790 | if (tmp) { |
fae3c158 | 791 | writel(readl(&dma->dmastat), &dma->dmastat); |
1da177e4 LT |
792 | |
793 | /* transfer all/some fifo data */ | |
fae3c158 RRD |
794 | writel(req->req.dma, &dma->dmaaddr); |
795 | tmp = min(tmp, req->req.length); | |
1da177e4 LT |
796 | |
797 | /* dma irq, faking scatterlist status */ | |
fae3c158 | 798 | req->td->dmacount = cpu_to_le32(req->req.length - tmp); |
ae8e530a RRD |
799 | writel(BIT(DMA_DONE_INTERRUPT_ENABLE) | tmp, |
800 | &dma->dmacount); | |
1da177e4 LT |
801 | req->td->dmadesc = 0; |
802 | req->valid = 1; | |
803 | ||
3e76fdcb RRD |
804 | writel(BIT(DMA_ENABLE), &dma->dmactl); |
805 | writel(BIT(DMA_START), &dma->dmastat); | |
1da177e4 LT |
806 | return; |
807 | } | |
808 | } | |
809 | ||
810 | tmp = dmactl_default; | |
811 | ||
812 | /* force packet boundaries between dma requests, but prevent the | |
813 | * controller from automagically writing a last "short" packet | |
814 | * (zero length) unless the driver explicitly said to do that. | |
815 | */ | |
816 | if (ep->is_in) { | |
fae3c158 RRD |
817 | if (likely((req->req.length % ep->ep.maxpacket) || |
818 | req->req.zero)){ | |
3e76fdcb | 819 | tmp |= BIT(DMA_FIFO_VALIDATE); |
1da177e4 LT |
820 | ep->in_fifo_validate = 1; |
821 | } else | |
822 | ep->in_fifo_validate = 0; | |
823 | } | |
824 | ||
825 | /* init req->td, pointing to the current dummy */ | |
826 | req->td->dmadesc = cpu_to_le32 (ep->td_dma); | |
fae3c158 | 827 | fill_dma_desc(ep, req, 1); |
1da177e4 | 828 | |
90664198 | 829 | req->td->dmacount |= cpu_to_le32(BIT(END_OF_CHAIN)); |
1da177e4 | 830 | |
fae3c158 | 831 | start_queue(ep, tmp, req->td_dma); |
1da177e4 LT |
832 | } |
833 | ||
adc82f77 RRD |
834 | static inline void resume_dma(struct net2280_ep *ep) |
835 | { | |
3e76fdcb | 836 | writel(readl(&ep->dma->dmactl) | BIT(DMA_ENABLE), &ep->dma->dmactl); |
adc82f77 RRD |
837 | } |
838 | ||
1da177e4 | 839 | static inline void |
fae3c158 | 840 | queue_dma(struct net2280_ep *ep, struct net2280_request *req, int valid) |
1da177e4 LT |
841 | { |
842 | struct net2280_dma *end; | |
843 | dma_addr_t tmp; | |
844 | ||
845 | /* swap new dummy for old, link; fill and maybe activate */ | |
846 | end = ep->dummy; | |
847 | ep->dummy = req->td; | |
848 | req->td = end; | |
849 | ||
850 | tmp = ep->td_dma; | |
851 | ep->td_dma = req->td_dma; | |
852 | req->td_dma = tmp; | |
853 | ||
854 | end->dmadesc = cpu_to_le32 (ep->td_dma); | |
855 | ||
fae3c158 | 856 | fill_dma_desc(ep, req, valid); |
1da177e4 LT |
857 | } |
858 | ||
859 | static void | |
fae3c158 | 860 | done(struct net2280_ep *ep, struct net2280_request *req, int status) |
1da177e4 LT |
861 | { |
862 | struct net2280 *dev; | |
863 | unsigned stopped = ep->stopped; | |
864 | ||
fae3c158 | 865 | list_del_init(&req->queue); |
1da177e4 LT |
866 | |
867 | if (req->req.status == -EINPROGRESS) | |
868 | req->req.status = status; | |
869 | else | |
870 | status = req->req.status; | |
871 | ||
872 | dev = ep->dev; | |
ae4d7933 FB |
873 | if (ep->dma) |
874 | usb_gadget_unmap_request(&dev->gadget, &req->req, ep->is_in); | |
1da177e4 LT |
875 | |
876 | if (status && status != -ESHUTDOWN) | |
e56e69cc | 877 | ep_vdbg(dev, "complete %s req %p stat %d len %u/%u\n", |
1da177e4 LT |
878 | ep->ep.name, &req->req, status, |
879 | req->req.actual, req->req.length); | |
880 | ||
881 | /* don't modify queue heads during completion callback */ | |
882 | ep->stopped = 1; | |
fae3c158 | 883 | spin_unlock(&dev->lock); |
304f7e5e | 884 | usb_gadget_giveback_request(&ep->ep, &req->req); |
fae3c158 | 885 | spin_lock(&dev->lock); |
1da177e4 LT |
886 | ep->stopped = stopped; |
887 | } | |
888 | ||
889 | /*-------------------------------------------------------------------------*/ | |
890 | ||
891 | static int | |
fae3c158 | 892 | net2280_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) |
1da177e4 LT |
893 | { |
894 | struct net2280_request *req; | |
895 | struct net2280_ep *ep; | |
896 | struct net2280 *dev; | |
897 | unsigned long flags; | |
898 | ||
899 | /* we always require a cpu-view buffer, so that we can | |
900 | * always use pio (as fallback or whatever). | |
901 | */ | |
fae3c158 RRD |
902 | req = container_of(_req, struct net2280_request, req); |
903 | if (!_req || !_req->complete || !_req->buf || | |
904 | !list_empty(&req->queue)) | |
1da177e4 LT |
905 | return -EINVAL; |
906 | if (_req->length > (~0 & DMA_BYTE_COUNT_MASK)) | |
907 | return -EDOM; | |
fae3c158 | 908 | ep = container_of(_ep, struct net2280_ep, ep); |
1da177e4 LT |
909 | if (!_ep || (!ep->desc && ep->num != 0)) |
910 | return -EINVAL; | |
911 | dev = ep->dev; | |
912 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) | |
913 | return -ESHUTDOWN; | |
914 | ||
915 | /* FIXME implement PIO fallback for ZLPs with DMA */ | |
916 | if (ep->dma && _req->length == 0) | |
917 | return -EOPNOTSUPP; | |
918 | ||
919 | /* set up dma mapping in case the caller didn't */ | |
ae4d7933 FB |
920 | if (ep->dma) { |
921 | int ret; | |
922 | ||
923 | ret = usb_gadget_map_request(&dev->gadget, _req, | |
924 | ep->is_in); | |
925 | if (ret) | |
926 | return ret; | |
1da177e4 LT |
927 | } |
928 | ||
929 | #if 0 | |
e56e69cc | 930 | ep_vdbg(dev, "%s queue req %p, len %d buf %p\n", |
1da177e4 LT |
931 | _ep->name, _req, _req->length, _req->buf); |
932 | #endif | |
933 | ||
fae3c158 | 934 | spin_lock_irqsave(&dev->lock, flags); |
1da177e4 LT |
935 | |
936 | _req->status = -EINPROGRESS; | |
937 | _req->actual = 0; | |
938 | ||
939 | /* kickstart this i/o queue? */ | |
485f44d0 RRD |
940 | if (list_empty(&ep->queue) && !ep->stopped && |
941 | !((dev->quirks & PLX_SUPERSPEED) && ep->dma && | |
942 | (readl(&ep->regs->ep_rsp) & BIT(CLEAR_ENDPOINT_HALT)))) { | |
943 | ||
1da177e4 | 944 | /* use DMA if the endpoint supports it, else pio */ |
485f44d0 | 945 | if (ep->dma) |
fae3c158 | 946 | start_dma(ep, req); |
1da177e4 LT |
947 | else { |
948 | /* maybe there's no control data, just status ack */ | |
949 | if (ep->num == 0 && _req->length == 0) { | |
fae3c158 RRD |
950 | allow_status(ep); |
951 | done(ep, req, 0); | |
e56e69cc | 952 | ep_vdbg(dev, "%s status ack\n", ep->ep.name); |
1da177e4 LT |
953 | goto done; |
954 | } | |
955 | ||
956 | /* PIO ... stuff the fifo, or unblock it. */ | |
957 | if (ep->is_in) | |
fae3c158 RRD |
958 | write_fifo(ep, _req); |
959 | else if (list_empty(&ep->queue)) { | |
1da177e4 LT |
960 | u32 s; |
961 | ||
962 | /* OUT FIFO might have packet(s) buffered */ | |
fae3c158 | 963 | s = readl(&ep->regs->ep_stat); |
3e76fdcb | 964 | if ((s & BIT(FIFO_EMPTY)) == 0) { |
1da177e4 LT |
965 | /* note: _req->short_not_ok is |
966 | * ignored here since PIO _always_ | |
967 | * stops queue advance here, and | |
968 | * _req->status doesn't change for | |
969 | * short reads (only _req->actual) | |
970 | */ | |
fae3c158 RRD |
971 | if (read_fifo(ep, req) && |
972 | ep->num == 0) { | |
973 | done(ep, req, 0); | |
974 | allow_status(ep); | |
1da177e4 LT |
975 | /* don't queue it */ |
976 | req = NULL; | |
fae3c158 RRD |
977 | } else if (read_fifo(ep, req) && |
978 | ep->num != 0) { | |
979 | done(ep, req, 0); | |
980 | req = NULL; | |
1da177e4 | 981 | } else |
fae3c158 | 982 | s = readl(&ep->regs->ep_stat); |
1da177e4 LT |
983 | } |
984 | ||
985 | /* don't NAK, let the fifo fill */ | |
3e76fdcb RRD |
986 | if (req && (s & BIT(NAK_OUT_PACKETS))) |
987 | writel(BIT(CLEAR_NAK_OUT_PACKETS), | |
1da177e4 LT |
988 | &ep->regs->ep_rsp); |
989 | } | |
990 | } | |
991 | ||
992 | } else if (ep->dma) { | |
993 | int valid = 1; | |
994 | ||
995 | if (ep->is_in) { | |
996 | int expect; | |
997 | ||
998 | /* preventing magic zlps is per-engine state, not | |
999 | * per-transfer; irq logic must recover hiccups. | |
1000 | */ | |
fae3c158 RRD |
1001 | expect = likely(req->req.zero || |
1002 | (req->req.length % ep->ep.maxpacket)); | |
1da177e4 LT |
1003 | if (expect != ep->in_fifo_validate) |
1004 | valid = 0; | |
1005 | } | |
fae3c158 | 1006 | queue_dma(ep, req, valid); |
1da177e4 LT |
1007 | |
1008 | } /* else the irq handler advances the queue. */ | |
1009 | ||
1f26e28d | 1010 | ep->responded = 1; |
1da177e4 | 1011 | if (req) |
fae3c158 | 1012 | list_add_tail(&req->queue, &ep->queue); |
1da177e4 | 1013 | done: |
fae3c158 | 1014 | spin_unlock_irqrestore(&dev->lock, flags); |
1da177e4 LT |
1015 | |
1016 | /* pci writes may still be posted */ | |
1017 | return 0; | |
1018 | } | |
1019 | ||
1020 | static inline void | |
fae3c158 RRD |
1021 | dma_done(struct net2280_ep *ep, struct net2280_request *req, u32 dmacount, |
1022 | int status) | |
1da177e4 LT |
1023 | { |
1024 | req->req.actual = req->req.length - (DMA_BYTE_COUNT_MASK & dmacount); | |
fae3c158 | 1025 | done(ep, req, status); |
1da177e4 LT |
1026 | } |
1027 | ||
fae3c158 | 1028 | static void scan_dma_completions(struct net2280_ep *ep) |
1da177e4 LT |
1029 | { |
1030 | /* only look at descriptors that were "naturally" retired, | |
1031 | * so fifo and list head state won't matter | |
1032 | */ | |
fae3c158 | 1033 | while (!list_empty(&ep->queue)) { |
1da177e4 LT |
1034 | struct net2280_request *req; |
1035 | u32 tmp; | |
1036 | ||
fae3c158 | 1037 | req = list_entry(ep->queue.next, |
1da177e4 LT |
1038 | struct net2280_request, queue); |
1039 | if (!req->valid) | |
1040 | break; | |
fae3c158 RRD |
1041 | rmb(); |
1042 | tmp = le32_to_cpup(&req->td->dmacount); | |
3e76fdcb | 1043 | if ((tmp & BIT(VALID_BIT)) != 0) |
1da177e4 LT |
1044 | break; |
1045 | ||
1046 | /* SHORT_PACKET_TRANSFERRED_INTERRUPT handles "usb-short" | |
1047 | * cases where DMA must be aborted; this code handles | |
1048 | * all non-abort DMA completions. | |
1049 | */ | |
fae3c158 | 1050 | if (unlikely(req->td->dmadesc == 0)) { |
1da177e4 | 1051 | /* paranoia */ |
fae3c158 | 1052 | tmp = readl(&ep->dma->dmacount); |
1da177e4 LT |
1053 | if (tmp & DMA_BYTE_COUNT_MASK) |
1054 | break; | |
1055 | /* single transfer mode */ | |
fae3c158 | 1056 | dma_done(ep, req, tmp, 0); |
1da177e4 | 1057 | break; |
ae8e530a RRD |
1058 | } else if (!ep->is_in && |
1059 | (req->req.length % ep->ep.maxpacket) != 0) { | |
2eeb0016 | 1060 | if (ep->dev->quirks & PLX_SUPERSPEED) |
adc82f77 | 1061 | return dma_done(ep, req, tmp, 0); |
1da177e4 | 1062 | |
18a4e65f | 1063 | tmp = readl(&ep->regs->ep_stat); |
1da177e4 LT |
1064 | /* AVOID TROUBLE HERE by not issuing short reads from |
1065 | * your gadget driver. That helps avoids errata 0121, | |
1066 | * 0122, and 0124; not all cases trigger the warning. | |
1067 | */ | |
3e76fdcb | 1068 | if ((tmp & BIT(NAK_OUT_PACKETS)) == 0) { |
e56e69cc | 1069 | ep_warn(ep->dev, "%s lost packet sync!\n", |
1da177e4 LT |
1070 | ep->ep.name); |
1071 | req->req.status = -EOVERFLOW; | |
fae3c158 RRD |
1072 | } else { |
1073 | tmp = readl(&ep->regs->ep_avail); | |
1074 | if (tmp) { | |
1075 | /* fifo gets flushed later */ | |
1076 | ep->out_overflow = 1; | |
e56e69cc | 1077 | ep_dbg(ep->dev, |
fae3c158 | 1078 | "%s dma, discard %d len %d\n", |
1da177e4 LT |
1079 | ep->ep.name, tmp, |
1080 | req->req.length); | |
fae3c158 RRD |
1081 | req->req.status = -EOVERFLOW; |
1082 | } | |
1da177e4 LT |
1083 | } |
1084 | } | |
fae3c158 | 1085 | dma_done(ep, req, tmp, 0); |
1da177e4 LT |
1086 | } |
1087 | } | |
1088 | ||
fae3c158 | 1089 | static void restart_dma(struct net2280_ep *ep) |
1da177e4 LT |
1090 | { |
1091 | struct net2280_request *req; | |
1da177e4 LT |
1092 | |
1093 | if (ep->stopped) | |
1094 | return; | |
fae3c158 | 1095 | req = list_entry(ep->queue.next, struct net2280_request, queue); |
1da177e4 | 1096 | |
90664198 | 1097 | start_dma(ep, req); |
1da177e4 LT |
1098 | } |
1099 | ||
e721c457 | 1100 | static void abort_dma(struct net2280_ep *ep) |
1da177e4 LT |
1101 | { |
1102 | /* abort the current transfer */ | |
fae3c158 | 1103 | if (likely(!list_empty(&ep->queue))) { |
1da177e4 | 1104 | /* FIXME work around errata 0121, 0122, 0124 */ |
3e76fdcb | 1105 | writel(BIT(DMA_ABORT), &ep->dma->dmastat); |
fae3c158 | 1106 | spin_stop_dma(ep->dma); |
1da177e4 | 1107 | } else |
fae3c158 RRD |
1108 | stop_dma(ep->dma); |
1109 | scan_dma_completions(ep); | |
1da177e4 LT |
1110 | } |
1111 | ||
1112 | /* dequeue ALL requests */ | |
fae3c158 | 1113 | static void nuke(struct net2280_ep *ep) |
1da177e4 LT |
1114 | { |
1115 | struct net2280_request *req; | |
1116 | ||
1117 | /* called with spinlock held */ | |
1118 | ep->stopped = 1; | |
1119 | if (ep->dma) | |
fae3c158 RRD |
1120 | abort_dma(ep); |
1121 | while (!list_empty(&ep->queue)) { | |
1122 | req = list_entry(ep->queue.next, | |
1da177e4 LT |
1123 | struct net2280_request, |
1124 | queue); | |
fae3c158 | 1125 | done(ep, req, -ESHUTDOWN); |
1da177e4 LT |
1126 | } |
1127 | } | |
1128 | ||
1129 | /* dequeue JUST ONE request */ | |
fae3c158 | 1130 | static int net2280_dequeue(struct usb_ep *_ep, struct usb_request *_req) |
1da177e4 LT |
1131 | { |
1132 | struct net2280_ep *ep; | |
1133 | struct net2280_request *req; | |
1134 | unsigned long flags; | |
1135 | u32 dmactl; | |
1136 | int stopped; | |
1137 | ||
fae3c158 | 1138 | ep = container_of(_ep, struct net2280_ep, ep); |
1da177e4 LT |
1139 | if (!_ep || (!ep->desc && ep->num != 0) || !_req) |
1140 | return -EINVAL; | |
1141 | ||
fae3c158 | 1142 | spin_lock_irqsave(&ep->dev->lock, flags); |
1da177e4 LT |
1143 | stopped = ep->stopped; |
1144 | ||
1145 | /* quiesce dma while we patch the queue */ | |
1146 | dmactl = 0; | |
1147 | ep->stopped = 1; | |
1148 | if (ep->dma) { | |
fae3c158 | 1149 | dmactl = readl(&ep->dma->dmactl); |
1da177e4 | 1150 | /* WARNING erratum 0127 may kick in ... */ |
fae3c158 RRD |
1151 | stop_dma(ep->dma); |
1152 | scan_dma_completions(ep); | |
1da177e4 LT |
1153 | } |
1154 | ||
1155 | /* make sure it's still queued on this endpoint */ | |
fae3c158 | 1156 | list_for_each_entry(req, &ep->queue, queue) { |
1da177e4 LT |
1157 | if (&req->req == _req) |
1158 | break; | |
1159 | } | |
1160 | if (&req->req != _req) { | |
fae3c158 | 1161 | spin_unlock_irqrestore(&ep->dev->lock, flags); |
1da177e4 LT |
1162 | return -EINVAL; |
1163 | } | |
1164 | ||
1165 | /* queue head may be partially complete. */ | |
1166 | if (ep->queue.next == &req->queue) { | |
1167 | if (ep->dma) { | |
e56e69cc | 1168 | ep_dbg(ep->dev, "unlink (%s) dma\n", _ep->name); |
1da177e4 | 1169 | _req->status = -ECONNRESET; |
fae3c158 RRD |
1170 | abort_dma(ep); |
1171 | if (likely(ep->queue.next == &req->queue)) { | |
1172 | /* NOTE: misreports single-transfer mode*/ | |
1da177e4 | 1173 | req->td->dmacount = 0; /* invalidate */ |
fae3c158 RRD |
1174 | dma_done(ep, req, |
1175 | readl(&ep->dma->dmacount), | |
1da177e4 LT |
1176 | -ECONNRESET); |
1177 | } | |
1178 | } else { | |
e56e69cc | 1179 | ep_dbg(ep->dev, "unlink (%s) pio\n", _ep->name); |
fae3c158 | 1180 | done(ep, req, -ECONNRESET); |
1da177e4 LT |
1181 | } |
1182 | req = NULL; | |
1da177e4 LT |
1183 | } |
1184 | ||
1185 | if (req) | |
fae3c158 | 1186 | done(ep, req, -ECONNRESET); |
1da177e4 LT |
1187 | ep->stopped = stopped; |
1188 | ||
1189 | if (ep->dma) { | |
1190 | /* turn off dma on inactive queues */ | |
fae3c158 RRD |
1191 | if (list_empty(&ep->queue)) |
1192 | stop_dma(ep->dma); | |
1da177e4 LT |
1193 | else if (!ep->stopped) { |
1194 | /* resume current request, or start new one */ | |
1195 | if (req) | |
fae3c158 | 1196 | writel(dmactl, &ep->dma->dmactl); |
1da177e4 | 1197 | else |
fae3c158 | 1198 | start_dma(ep, list_entry(ep->queue.next, |
1da177e4 LT |
1199 | struct net2280_request, queue)); |
1200 | } | |
1201 | } | |
1202 | ||
fae3c158 | 1203 | spin_unlock_irqrestore(&ep->dev->lock, flags); |
1da177e4 LT |
1204 | return 0; |
1205 | } | |
1206 | ||
1207 | /*-------------------------------------------------------------------------*/ | |
1208 | ||
fae3c158 | 1209 | static int net2280_fifo_status(struct usb_ep *_ep); |
1da177e4 LT |
1210 | |
1211 | static int | |
8066134f | 1212 | net2280_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged) |
1da177e4 LT |
1213 | { |
1214 | struct net2280_ep *ep; | |
1215 | unsigned long flags; | |
1216 | int retval = 0; | |
1217 | ||
fae3c158 | 1218 | ep = container_of(_ep, struct net2280_ep, ep); |
1da177e4 LT |
1219 | if (!_ep || (!ep->desc && ep->num != 0)) |
1220 | return -EINVAL; | |
1221 | if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1222 | return -ESHUTDOWN; | |
1223 | if (ep->desc /* not ep0 */ && (ep->desc->bmAttributes & 0x03) | |
1224 | == USB_ENDPOINT_XFER_ISOC) | |
1225 | return -EINVAL; | |
1226 | ||
fae3c158 RRD |
1227 | spin_lock_irqsave(&ep->dev->lock, flags); |
1228 | if (!list_empty(&ep->queue)) | |
1da177e4 | 1229 | retval = -EAGAIN; |
fae3c158 | 1230 | else if (ep->is_in && value && net2280_fifo_status(_ep) != 0) |
1da177e4 LT |
1231 | retval = -EAGAIN; |
1232 | else { | |
e56e69cc | 1233 | ep_vdbg(ep->dev, "%s %s %s\n", _ep->name, |
8066134f AS |
1234 | value ? "set" : "clear", |
1235 | wedged ? "wedge" : "halt"); | |
1da177e4 LT |
1236 | /* set/clear, then synch memory views with the device */ |
1237 | if (value) { | |
1238 | if (ep->num == 0) | |
1239 | ep->dev->protocol_stall = 1; | |
1240 | else | |
fae3c158 | 1241 | set_halt(ep); |
8066134f AS |
1242 | if (wedged) |
1243 | ep->wedged = 1; | |
1244 | } else { | |
fae3c158 | 1245 | clear_halt(ep); |
2eeb0016 | 1246 | if (ep->dev->quirks & PLX_SUPERSPEED && |
adc82f77 RRD |
1247 | !list_empty(&ep->queue) && ep->td_dma) |
1248 | restart_dma(ep); | |
8066134f AS |
1249 | ep->wedged = 0; |
1250 | } | |
fae3c158 | 1251 | (void) readl(&ep->regs->ep_rsp); |
1da177e4 | 1252 | } |
fae3c158 | 1253 | spin_unlock_irqrestore(&ep->dev->lock, flags); |
1da177e4 LT |
1254 | |
1255 | return retval; | |
1256 | } | |
1257 | ||
fae3c158 | 1258 | static int net2280_set_halt(struct usb_ep *_ep, int value) |
8066134f AS |
1259 | { |
1260 | return net2280_set_halt_and_wedge(_ep, value, 0); | |
1261 | } | |
1262 | ||
fae3c158 | 1263 | static int net2280_set_wedge(struct usb_ep *_ep) |
8066134f AS |
1264 | { |
1265 | if (!_ep || _ep->name == ep0name) | |
1266 | return -EINVAL; | |
1267 | return net2280_set_halt_and_wedge(_ep, 1, 1); | |
1268 | } | |
1269 | ||
fae3c158 | 1270 | static int net2280_fifo_status(struct usb_ep *_ep) |
1da177e4 LT |
1271 | { |
1272 | struct net2280_ep *ep; | |
1273 | u32 avail; | |
1274 | ||
fae3c158 | 1275 | ep = container_of(_ep, struct net2280_ep, ep); |
1da177e4 LT |
1276 | if (!_ep || (!ep->desc && ep->num != 0)) |
1277 | return -ENODEV; | |
1278 | if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1279 | return -ESHUTDOWN; | |
1280 | ||
3e76fdcb | 1281 | avail = readl(&ep->regs->ep_avail) & (BIT(12) - 1); |
1da177e4 LT |
1282 | if (avail > ep->fifo_size) |
1283 | return -EOVERFLOW; | |
1284 | if (ep->is_in) | |
1285 | avail = ep->fifo_size - avail; | |
1286 | return avail; | |
1287 | } | |
1288 | ||
fae3c158 | 1289 | static void net2280_fifo_flush(struct usb_ep *_ep) |
1da177e4 LT |
1290 | { |
1291 | struct net2280_ep *ep; | |
1292 | ||
fae3c158 | 1293 | ep = container_of(_ep, struct net2280_ep, ep); |
1da177e4 LT |
1294 | if (!_ep || (!ep->desc && ep->num != 0)) |
1295 | return; | |
1296 | if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1297 | return; | |
1298 | ||
3e76fdcb | 1299 | writel(BIT(FIFO_FLUSH), &ep->regs->ep_stat); |
fae3c158 | 1300 | (void) readl(&ep->regs->ep_rsp); |
1da177e4 LT |
1301 | } |
1302 | ||
901b3d75 | 1303 | static const struct usb_ep_ops net2280_ep_ops = { |
1da177e4 LT |
1304 | .enable = net2280_enable, |
1305 | .disable = net2280_disable, | |
1306 | ||
1307 | .alloc_request = net2280_alloc_request, | |
1308 | .free_request = net2280_free_request, | |
1309 | ||
1da177e4 LT |
1310 | .queue = net2280_queue, |
1311 | .dequeue = net2280_dequeue, | |
1312 | ||
1313 | .set_halt = net2280_set_halt, | |
8066134f | 1314 | .set_wedge = net2280_set_wedge, |
1da177e4 LT |
1315 | .fifo_status = net2280_fifo_status, |
1316 | .fifo_flush = net2280_fifo_flush, | |
1317 | }; | |
1318 | ||
1319 | /*-------------------------------------------------------------------------*/ | |
1320 | ||
fae3c158 | 1321 | static int net2280_get_frame(struct usb_gadget *_gadget) |
1da177e4 LT |
1322 | { |
1323 | struct net2280 *dev; | |
1324 | unsigned long flags; | |
1325 | u16 retval; | |
1326 | ||
1327 | if (!_gadget) | |
1328 | return -ENODEV; | |
fae3c158 RRD |
1329 | dev = container_of(_gadget, struct net2280, gadget); |
1330 | spin_lock_irqsave(&dev->lock, flags); | |
1331 | retval = get_idx_reg(dev->regs, REG_FRAME) & 0x03ff; | |
1332 | spin_unlock_irqrestore(&dev->lock, flags); | |
1da177e4 LT |
1333 | return retval; |
1334 | } | |
1335 | ||
fae3c158 | 1336 | static int net2280_wakeup(struct usb_gadget *_gadget) |
1da177e4 LT |
1337 | { |
1338 | struct net2280 *dev; | |
1339 | u32 tmp; | |
1340 | unsigned long flags; | |
1341 | ||
1342 | if (!_gadget) | |
1343 | return 0; | |
fae3c158 | 1344 | dev = container_of(_gadget, struct net2280, gadget); |
1da177e4 | 1345 | |
fae3c158 RRD |
1346 | spin_lock_irqsave(&dev->lock, flags); |
1347 | tmp = readl(&dev->usb->usbctl); | |
3e76fdcb RRD |
1348 | if (tmp & BIT(DEVICE_REMOTE_WAKEUP_ENABLE)) |
1349 | writel(BIT(GENERATE_RESUME), &dev->usb->usbstat); | |
fae3c158 | 1350 | spin_unlock_irqrestore(&dev->lock, flags); |
1da177e4 LT |
1351 | |
1352 | /* pci writes may still be posted */ | |
1353 | return 0; | |
1354 | } | |
1355 | ||
fae3c158 | 1356 | static int net2280_set_selfpowered(struct usb_gadget *_gadget, int value) |
1da177e4 LT |
1357 | { |
1358 | struct net2280 *dev; | |
1359 | u32 tmp; | |
1360 | unsigned long flags; | |
1361 | ||
1362 | if (!_gadget) | |
1363 | return 0; | |
fae3c158 | 1364 | dev = container_of(_gadget, struct net2280, gadget); |
1da177e4 | 1365 | |
fae3c158 RRD |
1366 | spin_lock_irqsave(&dev->lock, flags); |
1367 | tmp = readl(&dev->usb->usbctl); | |
adc82f77 | 1368 | if (value) { |
3e76fdcb | 1369 | tmp |= BIT(SELF_POWERED_STATUS); |
adc82f77 RRD |
1370 | dev->selfpowered = 1; |
1371 | } else { | |
3e76fdcb | 1372 | tmp &= ~BIT(SELF_POWERED_STATUS); |
adc82f77 RRD |
1373 | dev->selfpowered = 0; |
1374 | } | |
fae3c158 RRD |
1375 | writel(tmp, &dev->usb->usbctl); |
1376 | spin_unlock_irqrestore(&dev->lock, flags); | |
1da177e4 LT |
1377 | |
1378 | return 0; | |
1379 | } | |
1380 | ||
1381 | static int net2280_pullup(struct usb_gadget *_gadget, int is_on) | |
1382 | { | |
1383 | struct net2280 *dev; | |
1384 | u32 tmp; | |
1385 | unsigned long flags; | |
1386 | ||
1387 | if (!_gadget) | |
1388 | return -ENODEV; | |
fae3c158 | 1389 | dev = container_of(_gadget, struct net2280, gadget); |
1da177e4 | 1390 | |
fae3c158 RRD |
1391 | spin_lock_irqsave(&dev->lock, flags); |
1392 | tmp = readl(&dev->usb->usbctl); | |
1da177e4 LT |
1393 | dev->softconnect = (is_on != 0); |
1394 | if (is_on) | |
3e76fdcb | 1395 | tmp |= BIT(USB_DETECT_ENABLE); |
1da177e4 | 1396 | else |
3e76fdcb | 1397 | tmp &= ~BIT(USB_DETECT_ENABLE); |
fae3c158 RRD |
1398 | writel(tmp, &dev->usb->usbctl); |
1399 | spin_unlock_irqrestore(&dev->lock, flags); | |
1da177e4 LT |
1400 | |
1401 | return 0; | |
1402 | } | |
1403 | ||
4cf5e00b FB |
1404 | static int net2280_start(struct usb_gadget *_gadget, |
1405 | struct usb_gadget_driver *driver); | |
22835b80 | 1406 | static int net2280_stop(struct usb_gadget *_gadget); |
0f91349b | 1407 | |
1da177e4 LT |
1408 | static const struct usb_gadget_ops net2280_ops = { |
1409 | .get_frame = net2280_get_frame, | |
1410 | .wakeup = net2280_wakeup, | |
1411 | .set_selfpowered = net2280_set_selfpowered, | |
1412 | .pullup = net2280_pullup, | |
4cf5e00b FB |
1413 | .udc_start = net2280_start, |
1414 | .udc_stop = net2280_stop, | |
1da177e4 LT |
1415 | }; |
1416 | ||
1417 | /*-------------------------------------------------------------------------*/ | |
1418 | ||
b99b406c | 1419 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES |
1da177e4 LT |
1420 | |
1421 | /* FIXME move these into procfs, and use seq_file. | |
1422 | * Sysfs _still_ doesn't behave for arbitrarily sized files, | |
1423 | * and also doesn't help products using this with 2.4 kernels. | |
1424 | */ | |
1425 | ||
1426 | /* "function" sysfs attribute */ | |
ce26bd23 GKH |
1427 | static ssize_t function_show(struct device *_dev, struct device_attribute *attr, |
1428 | char *buf) | |
1da177e4 | 1429 | { |
fae3c158 | 1430 | struct net2280 *dev = dev_get_drvdata(_dev); |
1da177e4 | 1431 | |
fae3c158 RRD |
1432 | if (!dev->driver || !dev->driver->function || |
1433 | strlen(dev->driver->function) > PAGE_SIZE) | |
1da177e4 | 1434 | return 0; |
fae3c158 | 1435 | return scnprintf(buf, PAGE_SIZE, "%s\n", dev->driver->function); |
1da177e4 | 1436 | } |
ce26bd23 | 1437 | static DEVICE_ATTR_RO(function); |
1da177e4 | 1438 | |
ce26bd23 GKH |
1439 | static ssize_t registers_show(struct device *_dev, |
1440 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
1441 | { |
1442 | struct net2280 *dev; | |
1443 | char *next; | |
1444 | unsigned size, t; | |
1445 | unsigned long flags; | |
1446 | int i; | |
1447 | u32 t1, t2; | |
30e69598 | 1448 | const char *s; |
1da177e4 | 1449 | |
fae3c158 | 1450 | dev = dev_get_drvdata(_dev); |
1da177e4 LT |
1451 | next = buf; |
1452 | size = PAGE_SIZE; | |
fae3c158 | 1453 | spin_lock_irqsave(&dev->lock, flags); |
1da177e4 LT |
1454 | |
1455 | if (dev->driver) | |
1456 | s = dev->driver->driver.name; | |
1457 | else | |
1458 | s = "(none)"; | |
1459 | ||
1460 | /* Main Control Registers */ | |
fae3c158 | 1461 | t = scnprintf(next, size, "%s version " DRIVER_VERSION |
d588ff58 | 1462 | ", chiprev %04x\n\n" |
1da177e4 LT |
1463 | "devinit %03x fifoctl %08x gadget '%s'\n" |
1464 | "pci irqenb0 %02x irqenb1 %08x " | |
1465 | "irqstat0 %04x irqstat1 %08x\n", | |
1466 | driver_name, dev->chiprev, | |
fae3c158 RRD |
1467 | readl(&dev->regs->devinit), |
1468 | readl(&dev->regs->fifoctl), | |
1da177e4 | 1469 | s, |
fae3c158 RRD |
1470 | readl(&dev->regs->pciirqenb0), |
1471 | readl(&dev->regs->pciirqenb1), | |
1472 | readl(&dev->regs->irqstat0), | |
1473 | readl(&dev->regs->irqstat1)); | |
1da177e4 LT |
1474 | size -= t; |
1475 | next += t; | |
1476 | ||
1477 | /* USB Control Registers */ | |
fae3c158 RRD |
1478 | t1 = readl(&dev->usb->usbctl); |
1479 | t2 = readl(&dev->usb->usbstat); | |
3e76fdcb RRD |
1480 | if (t1 & BIT(VBUS_PIN)) { |
1481 | if (t2 & BIT(HIGH_SPEED)) | |
1da177e4 LT |
1482 | s = "high speed"; |
1483 | else if (dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1484 | s = "powered"; | |
1485 | else | |
1486 | s = "full speed"; | |
1487 | /* full speed bit (6) not working?? */ | |
1488 | } else | |
1489 | s = "not attached"; | |
fae3c158 | 1490 | t = scnprintf(next, size, |
1da177e4 LT |
1491 | "stdrsp %08x usbctl %08x usbstat %08x " |
1492 | "addr 0x%02x (%s)\n", | |
fae3c158 RRD |
1493 | readl(&dev->usb->stdrsp), t1, t2, |
1494 | readl(&dev->usb->ouraddr), s); | |
1da177e4 LT |
1495 | size -= t; |
1496 | next += t; | |
1497 | ||
1498 | /* PCI Master Control Registers */ | |
1499 | ||
1500 | /* DMA Control Registers */ | |
1501 | ||
1502 | /* Configurable EP Control Registers */ | |
adc82f77 | 1503 | for (i = 0; i < dev->n_ep; i++) { |
1da177e4 LT |
1504 | struct net2280_ep *ep; |
1505 | ||
fae3c158 | 1506 | ep = &dev->ep[i]; |
1da177e4 LT |
1507 | if (i && !ep->desc) |
1508 | continue; | |
1509 | ||
adc82f77 | 1510 | t1 = readl(&ep->cfg->ep_cfg); |
fae3c158 RRD |
1511 | t2 = readl(&ep->regs->ep_rsp) & 0xff; |
1512 | t = scnprintf(next, size, | |
1da177e4 LT |
1513 | "\n%s\tcfg %05x rsp (%02x) %s%s%s%s%s%s%s%s" |
1514 | "irqenb %02x\n", | |
1515 | ep->ep.name, t1, t2, | |
3e76fdcb | 1516 | (t2 & BIT(CLEAR_NAK_OUT_PACKETS)) |
1da177e4 | 1517 | ? "NAK " : "", |
3e76fdcb | 1518 | (t2 & BIT(CLEAR_EP_HIDE_STATUS_PHASE)) |
1da177e4 | 1519 | ? "hide " : "", |
3e76fdcb | 1520 | (t2 & BIT(CLEAR_EP_FORCE_CRC_ERROR)) |
1da177e4 | 1521 | ? "CRC " : "", |
3e76fdcb | 1522 | (t2 & BIT(CLEAR_INTERRUPT_MODE)) |
1da177e4 | 1523 | ? "interrupt " : "", |
3e76fdcb | 1524 | (t2 & BIT(CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE)) |
1da177e4 | 1525 | ? "status " : "", |
3e76fdcb | 1526 | (t2 & BIT(CLEAR_NAK_OUT_PACKETS_MODE)) |
1da177e4 | 1527 | ? "NAKmode " : "", |
3e76fdcb | 1528 | (t2 & BIT(CLEAR_ENDPOINT_TOGGLE)) |
1da177e4 | 1529 | ? "DATA1 " : "DATA0 ", |
3e76fdcb | 1530 | (t2 & BIT(CLEAR_ENDPOINT_HALT)) |
1da177e4 | 1531 | ? "HALT " : "", |
fae3c158 | 1532 | readl(&ep->regs->ep_irqenb)); |
1da177e4 LT |
1533 | size -= t; |
1534 | next += t; | |
1535 | ||
fae3c158 | 1536 | t = scnprintf(next, size, |
1da177e4 LT |
1537 | "\tstat %08x avail %04x " |
1538 | "(ep%d%s-%s)%s\n", | |
fae3c158 RRD |
1539 | readl(&ep->regs->ep_stat), |
1540 | readl(&ep->regs->ep_avail), | |
1541 | t1 & 0x0f, DIR_STRING(t1), | |
1542 | type_string(t1 >> 8), | |
1da177e4 LT |
1543 | ep->stopped ? "*" : ""); |
1544 | size -= t; | |
1545 | next += t; | |
1546 | ||
1547 | if (!ep->dma) | |
1548 | continue; | |
1549 | ||
fae3c158 | 1550 | t = scnprintf(next, size, |
1da177e4 LT |
1551 | " dma\tctl %08x stat %08x count %08x\n" |
1552 | "\taddr %08x desc %08x\n", | |
fae3c158 RRD |
1553 | readl(&ep->dma->dmactl), |
1554 | readl(&ep->dma->dmastat), | |
1555 | readl(&ep->dma->dmacount), | |
1556 | readl(&ep->dma->dmaaddr), | |
1557 | readl(&ep->dma->dmadesc)); | |
1da177e4 LT |
1558 | size -= t; |
1559 | next += t; | |
1560 | ||
1561 | } | |
1562 | ||
fae3c158 | 1563 | /* Indexed Registers (none yet) */ |
1da177e4 LT |
1564 | |
1565 | /* Statistics */ | |
fae3c158 | 1566 | t = scnprintf(next, size, "\nirqs: "); |
1da177e4 LT |
1567 | size -= t; |
1568 | next += t; | |
adc82f77 | 1569 | for (i = 0; i < dev->n_ep; i++) { |
1da177e4 LT |
1570 | struct net2280_ep *ep; |
1571 | ||
fae3c158 | 1572 | ep = &dev->ep[i]; |
1da177e4 LT |
1573 | if (i && !ep->irqs) |
1574 | continue; | |
fae3c158 | 1575 | t = scnprintf(next, size, " %s/%lu", ep->ep.name, ep->irqs); |
1da177e4 LT |
1576 | size -= t; |
1577 | next += t; | |
1578 | ||
1579 | } | |
fae3c158 | 1580 | t = scnprintf(next, size, "\n"); |
1da177e4 LT |
1581 | size -= t; |
1582 | next += t; | |
1583 | ||
fae3c158 | 1584 | spin_unlock_irqrestore(&dev->lock, flags); |
1da177e4 LT |
1585 | |
1586 | return PAGE_SIZE - size; | |
1587 | } | |
ce26bd23 | 1588 | static DEVICE_ATTR_RO(registers); |
1da177e4 | 1589 | |
ce26bd23 GKH |
1590 | static ssize_t queues_show(struct device *_dev, struct device_attribute *attr, |
1591 | char *buf) | |
1da177e4 LT |
1592 | { |
1593 | struct net2280 *dev; | |
1594 | char *next; | |
1595 | unsigned size; | |
1596 | unsigned long flags; | |
1597 | int i; | |
1598 | ||
fae3c158 | 1599 | dev = dev_get_drvdata(_dev); |
1da177e4 LT |
1600 | next = buf; |
1601 | size = PAGE_SIZE; | |
fae3c158 | 1602 | spin_lock_irqsave(&dev->lock, flags); |
1da177e4 | 1603 | |
adc82f77 | 1604 | for (i = 0; i < dev->n_ep; i++) { |
fae3c158 | 1605 | struct net2280_ep *ep = &dev->ep[i]; |
1da177e4 LT |
1606 | struct net2280_request *req; |
1607 | int t; | |
1608 | ||
1609 | if (i != 0) { | |
1610 | const struct usb_endpoint_descriptor *d; | |
1611 | ||
1612 | d = ep->desc; | |
1613 | if (!d) | |
1614 | continue; | |
1615 | t = d->bEndpointAddress; | |
fae3c158 | 1616 | t = scnprintf(next, size, |
1da177e4 LT |
1617 | "\n%s (ep%d%s-%s) max %04x %s fifo %d\n", |
1618 | ep->ep.name, t & USB_ENDPOINT_NUMBER_MASK, | |
1619 | (t & USB_DIR_IN) ? "in" : "out", | |
a27f37a1 | 1620 | type_string(d->bmAttributes), |
fae3c158 | 1621 | usb_endpoint_maxp(d) & 0x1fff, |
1da177e4 LT |
1622 | ep->dma ? "dma" : "pio", ep->fifo_size |
1623 | ); | |
1624 | } else /* ep0 should only have one transfer queued */ | |
fae3c158 | 1625 | t = scnprintf(next, size, "ep0 max 64 pio %s\n", |
1da177e4 LT |
1626 | ep->is_in ? "in" : "out"); |
1627 | if (t <= 0 || t > size) | |
1628 | goto done; | |
1629 | size -= t; | |
1630 | next += t; | |
1631 | ||
fae3c158 RRD |
1632 | if (list_empty(&ep->queue)) { |
1633 | t = scnprintf(next, size, "\t(nothing queued)\n"); | |
1da177e4 LT |
1634 | if (t <= 0 || t > size) |
1635 | goto done; | |
1636 | size -= t; | |
1637 | next += t; | |
1638 | continue; | |
1639 | } | |
fae3c158 RRD |
1640 | list_for_each_entry(req, &ep->queue, queue) { |
1641 | if (ep->dma && req->td_dma == readl(&ep->dma->dmadesc)) | |
1642 | t = scnprintf(next, size, | |
1da177e4 LT |
1643 | "\treq %p len %d/%d " |
1644 | "buf %p (dmacount %08x)\n", | |
1645 | &req->req, req->req.actual, | |
1646 | req->req.length, req->req.buf, | |
fae3c158 | 1647 | readl(&ep->dma->dmacount)); |
1da177e4 | 1648 | else |
fae3c158 | 1649 | t = scnprintf(next, size, |
1da177e4 LT |
1650 | "\treq %p len %d/%d buf %p\n", |
1651 | &req->req, req->req.actual, | |
1652 | req->req.length, req->req.buf); | |
1653 | if (t <= 0 || t > size) | |
1654 | goto done; | |
1655 | size -= t; | |
1656 | next += t; | |
1657 | ||
1658 | if (ep->dma) { | |
1659 | struct net2280_dma *td; | |
1660 | ||
1661 | td = req->td; | |
fae3c158 | 1662 | t = scnprintf(next, size, "\t td %08x " |
1da177e4 LT |
1663 | " count %08x buf %08x desc %08x\n", |
1664 | (u32) req->td_dma, | |
fae3c158 RRD |
1665 | le32_to_cpu(td->dmacount), |
1666 | le32_to_cpu(td->dmaaddr), | |
1667 | le32_to_cpu(td->dmadesc)); | |
1da177e4 LT |
1668 | if (t <= 0 || t > size) |
1669 | goto done; | |
1670 | size -= t; | |
1671 | next += t; | |
1672 | } | |
1673 | } | |
1674 | } | |
1675 | ||
1676 | done: | |
fae3c158 | 1677 | spin_unlock_irqrestore(&dev->lock, flags); |
1da177e4 LT |
1678 | return PAGE_SIZE - size; |
1679 | } | |
ce26bd23 | 1680 | static DEVICE_ATTR_RO(queues); |
1da177e4 LT |
1681 | |
1682 | ||
1683 | #else | |
1684 | ||
fae3c158 RRD |
1685 | #define device_create_file(a, b) (0) |
1686 | #define device_remove_file(a, b) do { } while (0) | |
1da177e4 LT |
1687 | |
1688 | #endif | |
1689 | ||
1690 | /*-------------------------------------------------------------------------*/ | |
1691 | ||
1692 | /* another driver-specific mode might be a request type doing dma | |
1693 | * to/from another device fifo instead of to/from memory. | |
1694 | */ | |
1695 | ||
fae3c158 | 1696 | static void set_fifo_mode(struct net2280 *dev, int mode) |
1da177e4 LT |
1697 | { |
1698 | /* keeping high bits preserves BAR2 */ | |
fae3c158 | 1699 | writel((0xffff << PCI_BASE2_RANGE) | mode, &dev->regs->fifoctl); |
1da177e4 LT |
1700 | |
1701 | /* always ep-{a,b,e,f} ... maybe not ep-c or ep-d */ | |
fae3c158 RRD |
1702 | INIT_LIST_HEAD(&dev->gadget.ep_list); |
1703 | list_add_tail(&dev->ep[1].ep.ep_list, &dev->gadget.ep_list); | |
1704 | list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list); | |
1da177e4 LT |
1705 | switch (mode) { |
1706 | case 0: | |
fae3c158 RRD |
1707 | list_add_tail(&dev->ep[3].ep.ep_list, &dev->gadget.ep_list); |
1708 | list_add_tail(&dev->ep[4].ep.ep_list, &dev->gadget.ep_list); | |
1709 | dev->ep[1].fifo_size = dev->ep[2].fifo_size = 1024; | |
1da177e4 LT |
1710 | break; |
1711 | case 1: | |
fae3c158 | 1712 | dev->ep[1].fifo_size = dev->ep[2].fifo_size = 2048; |
1da177e4 LT |
1713 | break; |
1714 | case 2: | |
fae3c158 RRD |
1715 | list_add_tail(&dev->ep[3].ep.ep_list, &dev->gadget.ep_list); |
1716 | dev->ep[1].fifo_size = 2048; | |
1717 | dev->ep[2].fifo_size = 1024; | |
1da177e4 LT |
1718 | break; |
1719 | } | |
1720 | /* fifo sizes for ep0, ep-c, ep-d, ep-e, and ep-f never change */ | |
fae3c158 RRD |
1721 | list_add_tail(&dev->ep[5].ep.ep_list, &dev->gadget.ep_list); |
1722 | list_add_tail(&dev->ep[6].ep.ep_list, &dev->gadget.ep_list); | |
1da177e4 LT |
1723 | } |
1724 | ||
adc82f77 RRD |
1725 | static void defect7374_disable_data_eps(struct net2280 *dev) |
1726 | { | |
1727 | /* | |
1728 | * For Defect 7374, disable data EPs (and more): | |
1729 | * - This phase undoes the earlier phase of the Defect 7374 workaround, | |
1730 | * returing ep regs back to normal. | |
1731 | */ | |
1732 | struct net2280_ep *ep; | |
1733 | int i; | |
1734 | unsigned char ep_sel; | |
1735 | u32 tmp_reg; | |
1736 | ||
1737 | for (i = 1; i < 5; i++) { | |
1738 | ep = &dev->ep[i]; | |
1739 | writel(0, &ep->cfg->ep_cfg); | |
1740 | } | |
1741 | ||
1742 | /* CSROUT, CSRIN, PCIOUT, PCIIN, STATIN, RCIN */ | |
1743 | for (i = 0; i < 6; i++) | |
1744 | writel(0, &dev->dep[i].dep_cfg); | |
1745 | ||
1746 | for (ep_sel = 0; ep_sel <= 21; ep_sel++) { | |
1747 | /* Select an endpoint for subsequent operations: */ | |
1748 | tmp_reg = readl(&dev->plregs->pl_ep_ctrl); | |
1749 | writel(((tmp_reg & ~0x1f) | ep_sel), &dev->plregs->pl_ep_ctrl); | |
1750 | ||
1751 | if (ep_sel < 2 || (ep_sel > 9 && ep_sel < 14) || | |
1752 | ep_sel == 18 || ep_sel == 20) | |
1753 | continue; | |
1754 | ||
1755 | /* Change settings on some selected endpoints */ | |
1756 | tmp_reg = readl(&dev->plregs->pl_ep_cfg_4); | |
3e76fdcb | 1757 | tmp_reg &= ~BIT(NON_CTRL_IN_TOLERATE_BAD_DIR); |
adc82f77 RRD |
1758 | writel(tmp_reg, &dev->plregs->pl_ep_cfg_4); |
1759 | tmp_reg = readl(&dev->plregs->pl_ep_ctrl); | |
3e76fdcb | 1760 | tmp_reg |= BIT(EP_INITIALIZED); |
adc82f77 RRD |
1761 | writel(tmp_reg, &dev->plregs->pl_ep_ctrl); |
1762 | } | |
1763 | } | |
1764 | ||
1765 | static void defect7374_enable_data_eps_zero(struct net2280 *dev) | |
1766 | { | |
1767 | u32 tmp = 0, tmp_reg; | |
5517525e | 1768 | u32 scratch; |
adc82f77 RRD |
1769 | int i; |
1770 | unsigned char ep_sel; | |
1771 | ||
1772 | scratch = get_idx_reg(dev->regs, SCRATCH); | |
5517525e RRD |
1773 | |
1774 | WARN_ON((scratch & (0xf << DEFECT7374_FSM_FIELD)) | |
1775 | == DEFECT7374_FSM_SS_CONTROL_READ); | |
1776 | ||
adc82f77 RRD |
1777 | scratch &= ~(0xf << DEFECT7374_FSM_FIELD); |
1778 | ||
5517525e RRD |
1779 | ep_warn(dev, "Operate Defect 7374 workaround soft this time"); |
1780 | ep_warn(dev, "It will operate on cold-reboot and SS connect"); | |
adc82f77 | 1781 | |
5517525e RRD |
1782 | /*GPEPs:*/ |
1783 | tmp = ((0 << ENDPOINT_NUMBER) | BIT(ENDPOINT_DIRECTION) | | |
1784 | (2 << OUT_ENDPOINT_TYPE) | (2 << IN_ENDPOINT_TYPE) | | |
1785 | ((dev->enhanced_mode) ? | |
1786 | BIT(OUT_ENDPOINT_ENABLE) : BIT(ENDPOINT_ENABLE)) | | |
1787 | BIT(IN_ENDPOINT_ENABLE)); | |
adc82f77 | 1788 | |
5517525e RRD |
1789 | for (i = 1; i < 5; i++) |
1790 | writel(tmp, &dev->ep[i].cfg->ep_cfg); | |
adc82f77 | 1791 | |
5517525e RRD |
1792 | /* CSRIN, PCIIN, STATIN, RCIN*/ |
1793 | tmp = ((0 << ENDPOINT_NUMBER) | BIT(ENDPOINT_ENABLE)); | |
1794 | writel(tmp, &dev->dep[1].dep_cfg); | |
1795 | writel(tmp, &dev->dep[3].dep_cfg); | |
1796 | writel(tmp, &dev->dep[4].dep_cfg); | |
1797 | writel(tmp, &dev->dep[5].dep_cfg); | |
adc82f77 | 1798 | |
5517525e RRD |
1799 | /*Implemented for development and debug. |
1800 | * Can be refined/tuned later.*/ | |
1801 | for (ep_sel = 0; ep_sel <= 21; ep_sel++) { | |
1802 | /* Select an endpoint for subsequent operations: */ | |
1803 | tmp_reg = readl(&dev->plregs->pl_ep_ctrl); | |
1804 | writel(((tmp_reg & ~0x1f) | ep_sel), | |
1805 | &dev->plregs->pl_ep_ctrl); | |
1806 | ||
1807 | if (ep_sel == 1) { | |
1808 | tmp = | |
1809 | (readl(&dev->plregs->pl_ep_ctrl) | | |
1810 | BIT(CLEAR_ACK_ERROR_CODE) | 0); | |
1811 | writel(tmp, &dev->plregs->pl_ep_ctrl); | |
1812 | continue; | |
adc82f77 RRD |
1813 | } |
1814 | ||
5517525e RRD |
1815 | if (ep_sel == 0 || (ep_sel > 9 && ep_sel < 14) || |
1816 | ep_sel == 18 || ep_sel == 20) | |
1817 | continue; | |
1818 | ||
1819 | tmp = (readl(&dev->plregs->pl_ep_cfg_4) | | |
1820 | BIT(NON_CTRL_IN_TOLERATE_BAD_DIR) | 0); | |
1821 | writel(tmp, &dev->plregs->pl_ep_cfg_4); | |
1822 | ||
1823 | tmp = readl(&dev->plregs->pl_ep_ctrl) & | |
1824 | ~BIT(EP_INITIALIZED); | |
1825 | writel(tmp, &dev->plregs->pl_ep_ctrl); | |
adc82f77 | 1826 | |
adc82f77 | 1827 | } |
5517525e RRD |
1828 | |
1829 | /* Set FSM to focus on the first Control Read: | |
1830 | * - Tip: Connection speed is known upon the first | |
1831 | * setup request.*/ | |
1832 | scratch |= DEFECT7374_FSM_WAITING_FOR_CONTROL_READ; | |
1833 | set_idx_reg(dev->regs, SCRATCH, scratch); | |
1834 | ||
adc82f77 RRD |
1835 | } |
1836 | ||
1da177e4 LT |
1837 | /* keeping it simple: |
1838 | * - one bus driver, initted first; | |
1839 | * - one function driver, initted second | |
1840 | * | |
1841 | * most of the work to support multiple net2280 controllers would | |
1842 | * be to associate this gadget driver (yes?) with all of them, or | |
1843 | * perhaps to bind specific drivers to specific devices. | |
1844 | */ | |
1845 | ||
adc82f77 | 1846 | static void usb_reset_228x(struct net2280 *dev) |
1da177e4 LT |
1847 | { |
1848 | u32 tmp; | |
1849 | ||
1850 | dev->gadget.speed = USB_SPEED_UNKNOWN; | |
fae3c158 | 1851 | (void) readl(&dev->usb->usbctl); |
1da177e4 | 1852 | |
fae3c158 | 1853 | net2280_led_init(dev); |
1da177e4 LT |
1854 | |
1855 | /* disable automatic responses, and irqs */ | |
fae3c158 RRD |
1856 | writel(0, &dev->usb->stdrsp); |
1857 | writel(0, &dev->regs->pciirqenb0); | |
1858 | writel(0, &dev->regs->pciirqenb1); | |
1da177e4 LT |
1859 | |
1860 | /* clear old dma and irq state */ | |
1861 | for (tmp = 0; tmp < 4; tmp++) { | |
adc82f77 | 1862 | struct net2280_ep *ep = &dev->ep[tmp + 1]; |
1da177e4 | 1863 | if (ep->dma) |
adc82f77 | 1864 | abort_dma(ep); |
1da177e4 | 1865 | } |
adc82f77 | 1866 | |
fae3c158 | 1867 | writel(~0, &dev->regs->irqstat0), |
3e76fdcb | 1868 | writel(~(u32)BIT(SUSPEND_REQUEST_INTERRUPT), &dev->regs->irqstat1), |
1da177e4 LT |
1869 | |
1870 | /* reset, and enable pci */ | |
3e76fdcb RRD |
1871 | tmp = readl(&dev->regs->devinit) | |
1872 | BIT(PCI_ENABLE) | | |
1873 | BIT(FIFO_SOFT_RESET) | | |
1874 | BIT(USB_SOFT_RESET) | | |
1875 | BIT(M8051_RESET); | |
fae3c158 | 1876 | writel(tmp, &dev->regs->devinit); |
1da177e4 LT |
1877 | |
1878 | /* standard fifo and endpoint allocations */ | |
fae3c158 | 1879 | set_fifo_mode(dev, (fifo_mode <= 2) ? fifo_mode : 0); |
1da177e4 LT |
1880 | } |
1881 | ||
adc82f77 RRD |
1882 | static void usb_reset_338x(struct net2280 *dev) |
1883 | { | |
1884 | u32 tmp; | |
adc82f77 RRD |
1885 | |
1886 | dev->gadget.speed = USB_SPEED_UNKNOWN; | |
1887 | (void)readl(&dev->usb->usbctl); | |
1888 | ||
1889 | net2280_led_init(dev); | |
1890 | ||
5517525e | 1891 | if (dev->bug7734_patched) { |
adc82f77 RRD |
1892 | /* disable automatic responses, and irqs */ |
1893 | writel(0, &dev->usb->stdrsp); | |
1894 | writel(0, &dev->regs->pciirqenb0); | |
1895 | writel(0, &dev->regs->pciirqenb1); | |
1896 | } | |
1897 | ||
1898 | /* clear old dma and irq state */ | |
1899 | for (tmp = 0; tmp < 4; tmp++) { | |
1900 | struct net2280_ep *ep = &dev->ep[tmp + 1]; | |
1901 | ||
1902 | if (ep->dma) | |
1903 | abort_dma(ep); | |
1904 | } | |
1905 | ||
1906 | writel(~0, &dev->regs->irqstat0), writel(~0, &dev->regs->irqstat1); | |
1907 | ||
5517525e | 1908 | if (dev->bug7734_patched) { |
adc82f77 RRD |
1909 | /* reset, and enable pci */ |
1910 | tmp = readl(&dev->regs->devinit) | | |
3e76fdcb RRD |
1911 | BIT(PCI_ENABLE) | |
1912 | BIT(FIFO_SOFT_RESET) | | |
1913 | BIT(USB_SOFT_RESET) | | |
1914 | BIT(M8051_RESET); | |
adc82f77 RRD |
1915 | |
1916 | writel(tmp, &dev->regs->devinit); | |
1917 | } | |
1918 | ||
1919 | /* always ep-{1,2,3,4} ... maybe not ep-3 or ep-4 */ | |
1920 | INIT_LIST_HEAD(&dev->gadget.ep_list); | |
1921 | ||
1922 | for (tmp = 1; tmp < dev->n_ep; tmp++) | |
1923 | list_add_tail(&dev->ep[tmp].ep.ep_list, &dev->gadget.ep_list); | |
1924 | ||
1925 | } | |
1926 | ||
1927 | static void usb_reset(struct net2280 *dev) | |
1928 | { | |
2eeb0016 | 1929 | if (dev->quirks & PLX_LEGACY) |
adc82f77 RRD |
1930 | return usb_reset_228x(dev); |
1931 | return usb_reset_338x(dev); | |
1932 | } | |
1933 | ||
1934 | static void usb_reinit_228x(struct net2280 *dev) | |
1da177e4 LT |
1935 | { |
1936 | u32 tmp; | |
1da177e4 LT |
1937 | |
1938 | /* basic endpoint init */ | |
1939 | for (tmp = 0; tmp < 7; tmp++) { | |
fae3c158 | 1940 | struct net2280_ep *ep = &dev->ep[tmp]; |
1da177e4 | 1941 | |
fae3c158 | 1942 | ep->ep.name = ep_name[tmp]; |
1da177e4 LT |
1943 | ep->dev = dev; |
1944 | ep->num = tmp; | |
1945 | ||
1946 | if (tmp > 0 && tmp <= 4) { | |
1947 | ep->fifo_size = 1024; | |
d588ff58 | 1948 | ep->dma = &dev->dma[tmp - 1]; |
1da177e4 LT |
1949 | } else |
1950 | ep->fifo_size = 64; | |
fae3c158 | 1951 | ep->regs = &dev->epregs[tmp]; |
adc82f77 RRD |
1952 | ep->cfg = &dev->epregs[tmp]; |
1953 | ep_reset_228x(dev->regs, ep); | |
1da177e4 | 1954 | } |
fae3c158 RRD |
1955 | usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 64); |
1956 | usb_ep_set_maxpacket_limit(&dev->ep[5].ep, 64); | |
1957 | usb_ep_set_maxpacket_limit(&dev->ep[6].ep, 64); | |
1da177e4 | 1958 | |
fae3c158 RRD |
1959 | dev->gadget.ep0 = &dev->ep[0].ep; |
1960 | dev->ep[0].stopped = 0; | |
1961 | INIT_LIST_HEAD(&dev->gadget.ep0->ep_list); | |
1da177e4 LT |
1962 | |
1963 | /* we want to prevent lowlevel/insecure access from the USB host, | |
1964 | * but erratum 0119 means this enable bit is ignored | |
1965 | */ | |
1966 | for (tmp = 0; tmp < 5; tmp++) | |
fae3c158 | 1967 | writel(EP_DONTUSE, &dev->dep[tmp].dep_cfg); |
1da177e4 LT |
1968 | } |
1969 | ||
adc82f77 RRD |
1970 | static void usb_reinit_338x(struct net2280 *dev) |
1971 | { | |
adc82f77 RRD |
1972 | int i; |
1973 | u32 tmp, val; | |
adc82f77 RRD |
1974 | static const u32 ne[9] = { 0, 1, 2, 3, 4, 1, 2, 3, 4 }; |
1975 | static const u32 ep_reg_addr[9] = { 0x00, 0xC0, 0x00, 0xC0, 0x00, | |
1976 | 0x00, 0xC0, 0x00, 0xC0 }; | |
1977 | ||
adc82f77 RRD |
1978 | /* basic endpoint init */ |
1979 | for (i = 0; i < dev->n_ep; i++) { | |
1980 | struct net2280_ep *ep = &dev->ep[i]; | |
1981 | ||
1982 | ep->ep.name = ep_name[i]; | |
1983 | ep->dev = dev; | |
1984 | ep->num = i; | |
1985 | ||
d588ff58 | 1986 | if (i > 0 && i <= 4) |
adc82f77 RRD |
1987 | ep->dma = &dev->dma[i - 1]; |
1988 | ||
1989 | if (dev->enhanced_mode) { | |
1990 | ep->cfg = &dev->epregs[ne[i]]; | |
1991 | ep->regs = (struct net2280_ep_regs __iomem *) | |
c43e97b2 | 1992 | (((void __iomem *)&dev->epregs[ne[i]]) + |
adc82f77 RRD |
1993 | ep_reg_addr[i]); |
1994 | ep->fiforegs = &dev->fiforegs[i]; | |
1995 | } else { | |
1996 | ep->cfg = &dev->epregs[i]; | |
1997 | ep->regs = &dev->epregs[i]; | |
1998 | ep->fiforegs = &dev->fiforegs[i]; | |
1999 | } | |
2000 | ||
2001 | ep->fifo_size = (i != 0) ? 2048 : 512; | |
2002 | ||
2003 | ep_reset_338x(dev->regs, ep); | |
2004 | } | |
2005 | usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 512); | |
2006 | ||
2007 | dev->gadget.ep0 = &dev->ep[0].ep; | |
2008 | dev->ep[0].stopped = 0; | |
2009 | ||
2010 | /* Link layer set up */ | |
5517525e | 2011 | if (dev->bug7734_patched) { |
adc82f77 | 2012 | tmp = readl(&dev->usb_ext->usbctl2) & |
3e76fdcb | 2013 | ~(BIT(U1_ENABLE) | BIT(U2_ENABLE) | BIT(LTM_ENABLE)); |
adc82f77 RRD |
2014 | writel(tmp, &dev->usb_ext->usbctl2); |
2015 | } | |
2016 | ||
2017 | /* Hardware Defect and Workaround */ | |
2018 | val = readl(&dev->ll_lfps_regs->ll_lfps_5); | |
2019 | val &= ~(0xf << TIMER_LFPS_6US); | |
2020 | val |= 0x5 << TIMER_LFPS_6US; | |
2021 | writel(val, &dev->ll_lfps_regs->ll_lfps_5); | |
2022 | ||
2023 | val = readl(&dev->ll_lfps_regs->ll_lfps_6); | |
2024 | val &= ~(0xffff << TIMER_LFPS_80US); | |
2025 | val |= 0x0100 << TIMER_LFPS_80US; | |
2026 | writel(val, &dev->ll_lfps_regs->ll_lfps_6); | |
2027 | ||
2028 | /* | |
2029 | * AA_AB Errata. Issue 4. Workaround for SuperSpeed USB | |
2030 | * Hot Reset Exit Handshake may Fail in Specific Case using | |
2031 | * Default Register Settings. Workaround for Enumeration test. | |
2032 | */ | |
2033 | val = readl(&dev->ll_tsn_regs->ll_tsn_counters_2); | |
2034 | val &= ~(0x1f << HOT_TX_NORESET_TS2); | |
2035 | val |= 0x10 << HOT_TX_NORESET_TS2; | |
2036 | writel(val, &dev->ll_tsn_regs->ll_tsn_counters_2); | |
2037 | ||
2038 | val = readl(&dev->ll_tsn_regs->ll_tsn_counters_3); | |
2039 | val &= ~(0x1f << HOT_RX_RESET_TS2); | |
2040 | val |= 0x3 << HOT_RX_RESET_TS2; | |
2041 | writel(val, &dev->ll_tsn_regs->ll_tsn_counters_3); | |
2042 | ||
2043 | /* | |
2044 | * Set Recovery Idle to Recover bit: | |
2045 | * - On SS connections, setting Recovery Idle to Recover Fmw improves | |
2046 | * link robustness with various hosts and hubs. | |
2047 | * - It is safe to set for all connection speeds; all chip revisions. | |
2048 | * - R-M-W to leave other bits undisturbed. | |
2049 | * - Reference PLX TT-7372 | |
2050 | */ | |
2051 | val = readl(&dev->ll_chicken_reg->ll_tsn_chicken_bit); | |
3e76fdcb | 2052 | val |= BIT(RECOVERY_IDLE_TO_RECOVER_FMW); |
adc82f77 RRD |
2053 | writel(val, &dev->ll_chicken_reg->ll_tsn_chicken_bit); |
2054 | ||
2055 | INIT_LIST_HEAD(&dev->gadget.ep0->ep_list); | |
2056 | ||
2057 | /* disable dedicated endpoints */ | |
2058 | writel(0x0D, &dev->dep[0].dep_cfg); | |
2059 | writel(0x0D, &dev->dep[1].dep_cfg); | |
2060 | writel(0x0E, &dev->dep[2].dep_cfg); | |
2061 | writel(0x0E, &dev->dep[3].dep_cfg); | |
2062 | writel(0x0F, &dev->dep[4].dep_cfg); | |
2063 | writel(0x0C, &dev->dep[5].dep_cfg); | |
2064 | } | |
2065 | ||
2066 | static void usb_reinit(struct net2280 *dev) | |
2067 | { | |
2eeb0016 | 2068 | if (dev->quirks & PLX_LEGACY) |
adc82f77 RRD |
2069 | return usb_reinit_228x(dev); |
2070 | return usb_reinit_338x(dev); | |
2071 | } | |
2072 | ||
2073 | static void ep0_start_228x(struct net2280 *dev) | |
1da177e4 | 2074 | { |
3e76fdcb RRD |
2075 | writel(BIT(CLEAR_EP_HIDE_STATUS_PHASE) | |
2076 | BIT(CLEAR_NAK_OUT_PACKETS) | | |
ae8e530a RRD |
2077 | BIT(CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE), |
2078 | &dev->epregs[0].ep_rsp); | |
1da177e4 LT |
2079 | |
2080 | /* | |
2081 | * hardware optionally handles a bunch of standard requests | |
2082 | * that the API hides from drivers anyway. have it do so. | |
2083 | * endpoint status/features are handled in software, to | |
2084 | * help pass tests for some dubious behavior. | |
2085 | */ | |
3e76fdcb RRD |
2086 | writel(BIT(SET_TEST_MODE) | |
2087 | BIT(SET_ADDRESS) | | |
2088 | BIT(DEVICE_SET_CLEAR_DEVICE_REMOTE_WAKEUP) | | |
2089 | BIT(GET_DEVICE_STATUS) | | |
ae8e530a RRD |
2090 | BIT(GET_INTERFACE_STATUS), |
2091 | &dev->usb->stdrsp); | |
3e76fdcb RRD |
2092 | writel(BIT(USB_ROOT_PORT_WAKEUP_ENABLE) | |
2093 | BIT(SELF_POWERED_USB_DEVICE) | | |
2094 | BIT(REMOTE_WAKEUP_SUPPORT) | | |
2095 | (dev->softconnect << USB_DETECT_ENABLE) | | |
2096 | BIT(SELF_POWERED_STATUS), | |
2097 | &dev->usb->usbctl); | |
1da177e4 LT |
2098 | |
2099 | /* enable irqs so we can see ep0 and general operation */ | |
3e76fdcb RRD |
2100 | writel(BIT(SETUP_PACKET_INTERRUPT_ENABLE) | |
2101 | BIT(ENDPOINT_0_INTERRUPT_ENABLE), | |
2102 | &dev->regs->pciirqenb0); | |
2103 | writel(BIT(PCI_INTERRUPT_ENABLE) | | |
2104 | BIT(PCI_MASTER_ABORT_RECEIVED_INTERRUPT_ENABLE) | | |
2105 | BIT(PCI_TARGET_ABORT_RECEIVED_INTERRUPT_ENABLE) | | |
2106 | BIT(PCI_RETRY_ABORT_INTERRUPT_ENABLE) | | |
2107 | BIT(VBUS_INTERRUPT_ENABLE) | | |
2108 | BIT(ROOT_PORT_RESET_INTERRUPT_ENABLE) | | |
2109 | BIT(SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE), | |
2110 | &dev->regs->pciirqenb1); | |
1da177e4 LT |
2111 | |
2112 | /* don't leave any writes posted */ | |
fae3c158 | 2113 | (void) readl(&dev->usb->usbctl); |
1da177e4 LT |
2114 | } |
2115 | ||
adc82f77 RRD |
2116 | static void ep0_start_338x(struct net2280 *dev) |
2117 | { | |
adc82f77 | 2118 | |
5517525e | 2119 | if (dev->bug7734_patched) |
3e76fdcb RRD |
2120 | writel(BIT(CLEAR_NAK_OUT_PACKETS_MODE) | |
2121 | BIT(SET_EP_HIDE_STATUS_PHASE), | |
adc82f77 RRD |
2122 | &dev->epregs[0].ep_rsp); |
2123 | ||
2124 | /* | |
2125 | * hardware optionally handles a bunch of standard requests | |
2126 | * that the API hides from drivers anyway. have it do so. | |
2127 | * endpoint status/features are handled in software, to | |
2128 | * help pass tests for some dubious behavior. | |
2129 | */ | |
3e76fdcb RRD |
2130 | writel(BIT(SET_ISOCHRONOUS_DELAY) | |
2131 | BIT(SET_SEL) | | |
2132 | BIT(SET_TEST_MODE) | | |
2133 | BIT(SET_ADDRESS) | | |
2134 | BIT(GET_INTERFACE_STATUS) | | |
2135 | BIT(GET_DEVICE_STATUS), | |
adc82f77 RRD |
2136 | &dev->usb->stdrsp); |
2137 | dev->wakeup_enable = 1; | |
3e76fdcb | 2138 | writel(BIT(USB_ROOT_PORT_WAKEUP_ENABLE) | |
adc82f77 | 2139 | (dev->softconnect << USB_DETECT_ENABLE) | |
3e76fdcb | 2140 | BIT(DEVICE_REMOTE_WAKEUP_ENABLE), |
adc82f77 RRD |
2141 | &dev->usb->usbctl); |
2142 | ||
2143 | /* enable irqs so we can see ep0 and general operation */ | |
3e76fdcb | 2144 | writel(BIT(SETUP_PACKET_INTERRUPT_ENABLE) | |
ae8e530a RRD |
2145 | BIT(ENDPOINT_0_INTERRUPT_ENABLE), |
2146 | &dev->regs->pciirqenb0); | |
3e76fdcb RRD |
2147 | writel(BIT(PCI_INTERRUPT_ENABLE) | |
2148 | BIT(ROOT_PORT_RESET_INTERRUPT_ENABLE) | | |
2149 | BIT(SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE) | | |
2150 | BIT(VBUS_INTERRUPT_ENABLE), | |
adc82f77 RRD |
2151 | &dev->regs->pciirqenb1); |
2152 | ||
2153 | /* don't leave any writes posted */ | |
2154 | (void)readl(&dev->usb->usbctl); | |
2155 | } | |
2156 | ||
2157 | static void ep0_start(struct net2280 *dev) | |
2158 | { | |
2eeb0016 | 2159 | if (dev->quirks & PLX_LEGACY) |
adc82f77 RRD |
2160 | return ep0_start_228x(dev); |
2161 | return ep0_start_338x(dev); | |
2162 | } | |
2163 | ||
1da177e4 LT |
2164 | /* when a driver is successfully registered, it will receive |
2165 | * control requests including set_configuration(), which enables | |
2166 | * non-control requests. then usb traffic follows until a | |
2167 | * disconnect is reported. then a host may connect again, or | |
2168 | * the driver might get unbound. | |
2169 | */ | |
4cf5e00b FB |
2170 | static int net2280_start(struct usb_gadget *_gadget, |
2171 | struct usb_gadget_driver *driver) | |
1da177e4 | 2172 | { |
4cf5e00b | 2173 | struct net2280 *dev; |
1da177e4 LT |
2174 | int retval; |
2175 | unsigned i; | |
2176 | ||
2177 | /* insist on high speed support from the driver, since | |
2178 | * (dev->usb->xcvrdiag & FORCE_FULL_SPEED_MODE) | |
2179 | * "must not be used in normal operation" | |
2180 | */ | |
ae8e530a RRD |
2181 | if (!driver || driver->max_speed < USB_SPEED_HIGH || |
2182 | !driver->setup) | |
1da177e4 | 2183 | return -EINVAL; |
4cf5e00b | 2184 | |
fae3c158 | 2185 | dev = container_of(_gadget, struct net2280, gadget); |
1da177e4 | 2186 | |
adc82f77 | 2187 | for (i = 0; i < dev->n_ep; i++) |
fae3c158 | 2188 | dev->ep[i].irqs = 0; |
1da177e4 LT |
2189 | |
2190 | /* hook up the driver ... */ | |
2191 | dev->softconnect = 1; | |
2192 | driver->driver.bus = NULL; | |
2193 | dev->driver = driver; | |
1da177e4 | 2194 | |
fae3c158 RRD |
2195 | retval = device_create_file(&dev->pdev->dev, &dev_attr_function); |
2196 | if (retval) | |
2197 | goto err_unbind; | |
2198 | retval = device_create_file(&dev->pdev->dev, &dev_attr_queues); | |
2199 | if (retval) | |
2200 | goto err_func; | |
1da177e4 | 2201 | |
7a74c481 | 2202 | /* enable host detection and ep0; and we're ready |
1da177e4 LT |
2203 | * for set_configuration as well as eventual disconnect. |
2204 | */ | |
fae3c158 | 2205 | net2280_led_active(dev, 1); |
adc82f77 | 2206 | |
5517525e | 2207 | if ((dev->quirks & PLX_SUPERSPEED) && !dev->bug7734_patched) |
adc82f77 RRD |
2208 | defect7374_enable_data_eps_zero(dev); |
2209 | ||
fae3c158 | 2210 | ep0_start(dev); |
1da177e4 | 2211 | |
1da177e4 LT |
2212 | /* pci writes may still be posted */ |
2213 | return 0; | |
b3899dac JG |
2214 | |
2215 | err_func: | |
fae3c158 | 2216 | device_remove_file(&dev->pdev->dev, &dev_attr_function); |
b3899dac | 2217 | err_unbind: |
b3899dac JG |
2218 | dev->driver = NULL; |
2219 | return retval; | |
1da177e4 | 2220 | } |
1da177e4 | 2221 | |
fae3c158 | 2222 | static void stop_activity(struct net2280 *dev, struct usb_gadget_driver *driver) |
1da177e4 LT |
2223 | { |
2224 | int i; | |
2225 | ||
2226 | /* don't disconnect if it's not connected */ | |
2227 | if (dev->gadget.speed == USB_SPEED_UNKNOWN) | |
2228 | driver = NULL; | |
2229 | ||
2230 | /* stop hardware; prevent new request submissions; | |
2231 | * and kill any outstanding requests. | |
2232 | */ | |
fae3c158 | 2233 | usb_reset(dev); |
adc82f77 | 2234 | for (i = 0; i < dev->n_ep; i++) |
fae3c158 | 2235 | nuke(&dev->ep[i]); |
1da177e4 | 2236 | |
699412d9 FB |
2237 | /* report disconnect; the driver is already quiesced */ |
2238 | if (driver) { | |
2239 | spin_unlock(&dev->lock); | |
2240 | driver->disconnect(&dev->gadget); | |
2241 | spin_lock(&dev->lock); | |
2242 | } | |
2243 | ||
fae3c158 | 2244 | usb_reinit(dev); |
1da177e4 LT |
2245 | } |
2246 | ||
22835b80 | 2247 | static int net2280_stop(struct usb_gadget *_gadget) |
1da177e4 | 2248 | { |
4cf5e00b | 2249 | struct net2280 *dev; |
1da177e4 LT |
2250 | unsigned long flags; |
2251 | ||
fae3c158 | 2252 | dev = container_of(_gadget, struct net2280, gadget); |
1da177e4 | 2253 | |
fae3c158 | 2254 | spin_lock_irqsave(&dev->lock, flags); |
bfd0ed57 | 2255 | stop_activity(dev, NULL); |
fae3c158 | 2256 | spin_unlock_irqrestore(&dev->lock, flags); |
1da177e4 | 2257 | |
fae3c158 | 2258 | net2280_led_active(dev, 0); |
2f076077 | 2259 | |
fae3c158 RRD |
2260 | device_remove_file(&dev->pdev->dev, &dev_attr_function); |
2261 | device_remove_file(&dev->pdev->dev, &dev_attr_queues); | |
1da177e4 | 2262 | |
bfd0ed57 | 2263 | dev->driver = NULL; |
84237bfb | 2264 | |
1da177e4 LT |
2265 | return 0; |
2266 | } | |
1da177e4 LT |
2267 | |
2268 | /*-------------------------------------------------------------------------*/ | |
2269 | ||
2270 | /* handle ep0, ep-e, ep-f with 64 byte packets: packet per irq. | |
2271 | * also works for dma-capable endpoints, in pio mode or just | |
2272 | * to manually advance the queue after short OUT transfers. | |
2273 | */ | |
fae3c158 | 2274 | static void handle_ep_small(struct net2280_ep *ep) |
1da177e4 LT |
2275 | { |
2276 | struct net2280_request *req; | |
2277 | u32 t; | |
2278 | /* 0 error, 1 mid-data, 2 done */ | |
2279 | int mode = 1; | |
2280 | ||
fae3c158 RRD |
2281 | if (!list_empty(&ep->queue)) |
2282 | req = list_entry(ep->queue.next, | |
1da177e4 LT |
2283 | struct net2280_request, queue); |
2284 | else | |
2285 | req = NULL; | |
2286 | ||
2287 | /* ack all, and handle what we care about */ | |
fae3c158 | 2288 | t = readl(&ep->regs->ep_stat); |
1da177e4 LT |
2289 | ep->irqs++; |
2290 | #if 0 | |
e56e69cc | 2291 | ep_vdbg(ep->dev, "%s ack ep_stat %08x, req %p\n", |
1da177e4 LT |
2292 | ep->ep.name, t, req ? &req->req : 0); |
2293 | #endif | |
2eeb0016 | 2294 | if (!ep->is_in || (ep->dev->quirks & PLX_2280)) |
3e76fdcb | 2295 | writel(t & ~BIT(NAK_OUT_PACKETS), &ep->regs->ep_stat); |
950ee4c8 GL |
2296 | else |
2297 | /* Added for 2282 */ | |
fae3c158 | 2298 | writel(t, &ep->regs->ep_stat); |
1da177e4 LT |
2299 | |
2300 | /* for ep0, monitor token irqs to catch data stage length errors | |
2301 | * and to synchronize on status. | |
2302 | * | |
2303 | * also, to defer reporting of protocol stalls ... here's where | |
2304 | * data or status first appears, handling stalls here should never | |
2305 | * cause trouble on the host side.. | |
2306 | * | |
2307 | * control requests could be slightly faster without token synch for | |
2308 | * status, but status can jam up that way. | |
2309 | */ | |
fae3c158 | 2310 | if (unlikely(ep->num == 0)) { |
1da177e4 LT |
2311 | if (ep->is_in) { |
2312 | /* status; stop NAKing */ | |
3e76fdcb | 2313 | if (t & BIT(DATA_OUT_PING_TOKEN_INTERRUPT)) { |
1da177e4 LT |
2314 | if (ep->dev->protocol_stall) { |
2315 | ep->stopped = 1; | |
fae3c158 | 2316 | set_halt(ep); |
1da177e4 LT |
2317 | } |
2318 | if (!req) | |
fae3c158 | 2319 | allow_status(ep); |
1da177e4 LT |
2320 | mode = 2; |
2321 | /* reply to extra IN data tokens with a zlp */ | |
3e76fdcb | 2322 | } else if (t & BIT(DATA_IN_TOKEN_INTERRUPT)) { |
1da177e4 LT |
2323 | if (ep->dev->protocol_stall) { |
2324 | ep->stopped = 1; | |
fae3c158 | 2325 | set_halt(ep); |
1da177e4 | 2326 | mode = 2; |
1f26e28d AS |
2327 | } else if (ep->responded && |
2328 | !req && !ep->stopped) | |
fae3c158 | 2329 | write_fifo(ep, NULL); |
1da177e4 LT |
2330 | } |
2331 | } else { | |
2332 | /* status; stop NAKing */ | |
3e76fdcb | 2333 | if (t & BIT(DATA_IN_TOKEN_INTERRUPT)) { |
1da177e4 LT |
2334 | if (ep->dev->protocol_stall) { |
2335 | ep->stopped = 1; | |
fae3c158 | 2336 | set_halt(ep); |
1da177e4 LT |
2337 | } |
2338 | mode = 2; | |
2339 | /* an extra OUT token is an error */ | |
ae8e530a RRD |
2340 | } else if (((t & BIT(DATA_OUT_PING_TOKEN_INTERRUPT)) && |
2341 | req && | |
2342 | req->req.actual == req->req.length) || | |
2343 | (ep->responded && !req)) { | |
1da177e4 | 2344 | ep->dev->protocol_stall = 1; |
fae3c158 | 2345 | set_halt(ep); |
1da177e4 LT |
2346 | ep->stopped = 1; |
2347 | if (req) | |
fae3c158 | 2348 | done(ep, req, -EOVERFLOW); |
1da177e4 LT |
2349 | req = NULL; |
2350 | } | |
2351 | } | |
2352 | } | |
2353 | ||
fae3c158 | 2354 | if (unlikely(!req)) |
1da177e4 LT |
2355 | return; |
2356 | ||
2357 | /* manual DMA queue advance after short OUT */ | |
fae3c158 | 2358 | if (likely(ep->dma)) { |
3e76fdcb | 2359 | if (t & BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT)) { |
1da177e4 LT |
2360 | u32 count; |
2361 | int stopped = ep->stopped; | |
2362 | ||
2363 | /* TRANSFERRED works around OUT_DONE erratum 0112. | |
2364 | * we expect (N <= maxpacket) bytes; host wrote M. | |
2365 | * iff (M < N) we won't ever see a DMA interrupt. | |
2366 | */ | |
2367 | ep->stopped = 1; | |
fae3c158 | 2368 | for (count = 0; ; t = readl(&ep->regs->ep_stat)) { |
1da177e4 LT |
2369 | |
2370 | /* any preceding dma transfers must finish. | |
2371 | * dma handles (M >= N), may empty the queue | |
2372 | */ | |
fae3c158 | 2373 | scan_dma_completions(ep); |
ae8e530a RRD |
2374 | if (unlikely(list_empty(&ep->queue) || |
2375 | ep->out_overflow)) { | |
1da177e4 LT |
2376 | req = NULL; |
2377 | break; | |
2378 | } | |
fae3c158 | 2379 | req = list_entry(ep->queue.next, |
1da177e4 LT |
2380 | struct net2280_request, queue); |
2381 | ||
2382 | /* here either (M < N), a "real" short rx; | |
2383 | * or (M == N) and the queue didn't empty | |
2384 | */ | |
3e76fdcb | 2385 | if (likely(t & BIT(FIFO_EMPTY))) { |
fae3c158 | 2386 | count = readl(&ep->dma->dmacount); |
1da177e4 | 2387 | count &= DMA_BYTE_COUNT_MASK; |
fae3c158 | 2388 | if (readl(&ep->dma->dmadesc) |
1da177e4 LT |
2389 | != req->td_dma) |
2390 | req = NULL; | |
2391 | break; | |
2392 | } | |
2393 | udelay(1); | |
2394 | } | |
2395 | ||
2396 | /* stop DMA, leave ep NAKing */ | |
3e76fdcb | 2397 | writel(BIT(DMA_ABORT), &ep->dma->dmastat); |
fae3c158 | 2398 | spin_stop_dma(ep->dma); |
1da177e4 | 2399 | |
fae3c158 | 2400 | if (likely(req)) { |
1da177e4 | 2401 | req->td->dmacount = 0; |
fae3c158 RRD |
2402 | t = readl(&ep->regs->ep_avail); |
2403 | dma_done(ep, req, count, | |
901b3d75 DB |
2404 | (ep->out_overflow || t) |
2405 | ? -EOVERFLOW : 0); | |
1da177e4 LT |
2406 | } |
2407 | ||
2408 | /* also flush to prevent erratum 0106 trouble */ | |
ae8e530a RRD |
2409 | if (unlikely(ep->out_overflow || |
2410 | (ep->dev->chiprev == 0x0100 && | |
2411 | ep->dev->gadget.speed | |
2412 | == USB_SPEED_FULL))) { | |
fae3c158 | 2413 | out_flush(ep); |
1da177e4 LT |
2414 | ep->out_overflow = 0; |
2415 | } | |
2416 | ||
2417 | /* (re)start dma if needed, stop NAKing */ | |
2418 | ep->stopped = stopped; | |
fae3c158 RRD |
2419 | if (!list_empty(&ep->queue)) |
2420 | restart_dma(ep); | |
1da177e4 | 2421 | } else |
e56e69cc | 2422 | ep_dbg(ep->dev, "%s dma ep_stat %08x ??\n", |
1da177e4 LT |
2423 | ep->ep.name, t); |
2424 | return; | |
2425 | ||
2426 | /* data packet(s) received (in the fifo, OUT) */ | |
3e76fdcb | 2427 | } else if (t & BIT(DATA_PACKET_RECEIVED_INTERRUPT)) { |
fae3c158 | 2428 | if (read_fifo(ep, req) && ep->num != 0) |
1da177e4 LT |
2429 | mode = 2; |
2430 | ||
2431 | /* data packet(s) transmitted (IN) */ | |
3e76fdcb | 2432 | } else if (t & BIT(DATA_PACKET_TRANSMITTED_INTERRUPT)) { |
1da177e4 LT |
2433 | unsigned len; |
2434 | ||
2435 | len = req->req.length - req->req.actual; | |
2436 | if (len > ep->ep.maxpacket) | |
2437 | len = ep->ep.maxpacket; | |
2438 | req->req.actual += len; | |
2439 | ||
2440 | /* if we wrote it all, we're usually done */ | |
fae3c158 RRD |
2441 | /* send zlps until the status stage */ |
2442 | if ((req->req.actual == req->req.length) && | |
2443 | (!req->req.zero || len != ep->ep.maxpacket) && ep->num) | |
1da177e4 | 2444 | mode = 2; |
1da177e4 LT |
2445 | |
2446 | /* there was nothing to do ... */ | |
2447 | } else if (mode == 1) | |
2448 | return; | |
2449 | ||
2450 | /* done */ | |
2451 | if (mode == 2) { | |
2452 | /* stream endpoints often resubmit/unlink in completion */ | |
fae3c158 | 2453 | done(ep, req, 0); |
1da177e4 LT |
2454 | |
2455 | /* maybe advance queue to next request */ | |
2456 | if (ep->num == 0) { | |
2457 | /* NOTE: net2280 could let gadget driver start the | |
2458 | * status stage later. since not all controllers let | |
2459 | * them control that, the api doesn't (yet) allow it. | |
2460 | */ | |
2461 | if (!ep->stopped) | |
fae3c158 | 2462 | allow_status(ep); |
1da177e4 LT |
2463 | req = NULL; |
2464 | } else { | |
fae3c158 RRD |
2465 | if (!list_empty(&ep->queue) && !ep->stopped) |
2466 | req = list_entry(ep->queue.next, | |
1da177e4 LT |
2467 | struct net2280_request, queue); |
2468 | else | |
2469 | req = NULL; | |
2470 | if (req && !ep->is_in) | |
fae3c158 | 2471 | stop_out_naking(ep); |
1da177e4 LT |
2472 | } |
2473 | } | |
2474 | ||
2475 | /* is there a buffer for the next packet? | |
2476 | * for best streaming performance, make sure there is one. | |
2477 | */ | |
2478 | if (req && !ep->stopped) { | |
2479 | ||
2480 | /* load IN fifo with next packet (may be zlp) */ | |
3e76fdcb | 2481 | if (t & BIT(DATA_PACKET_TRANSMITTED_INTERRUPT)) |
fae3c158 | 2482 | write_fifo(ep, &req->req); |
1da177e4 LT |
2483 | } |
2484 | } | |
2485 | ||
fae3c158 | 2486 | static struct net2280_ep *get_ep_by_addr(struct net2280 *dev, u16 wIndex) |
1da177e4 LT |
2487 | { |
2488 | struct net2280_ep *ep; | |
2489 | ||
2490 | if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0) | |
fae3c158 RRD |
2491 | return &dev->ep[0]; |
2492 | list_for_each_entry(ep, &dev->gadget.ep_list, ep.ep_list) { | |
1da177e4 LT |
2493 | u8 bEndpointAddress; |
2494 | ||
2495 | if (!ep->desc) | |
2496 | continue; | |
2497 | bEndpointAddress = ep->desc->bEndpointAddress; | |
2498 | if ((wIndex ^ bEndpointAddress) & USB_DIR_IN) | |
2499 | continue; | |
2500 | if ((wIndex & 0x0f) == (bEndpointAddress & 0x0f)) | |
2501 | return ep; | |
2502 | } | |
2503 | return NULL; | |
2504 | } | |
2505 | ||
adc82f77 RRD |
2506 | static void defect7374_workaround(struct net2280 *dev, struct usb_ctrlrequest r) |
2507 | { | |
2508 | u32 scratch, fsmvalue; | |
2509 | u32 ack_wait_timeout, state; | |
2510 | ||
2511 | /* Workaround for Defect 7374 (U1/U2 erroneously rejected): */ | |
2512 | scratch = get_idx_reg(dev->regs, SCRATCH); | |
2513 | fsmvalue = scratch & (0xf << DEFECT7374_FSM_FIELD); | |
2514 | scratch &= ~(0xf << DEFECT7374_FSM_FIELD); | |
2515 | ||
2516 | if (!((fsmvalue == DEFECT7374_FSM_WAITING_FOR_CONTROL_READ) && | |
2517 | (r.bRequestType & USB_DIR_IN))) | |
2518 | return; | |
2519 | ||
2520 | /* This is the first Control Read for this connection: */ | |
3e76fdcb | 2521 | if (!(readl(&dev->usb->usbstat) & BIT(SUPER_SPEED_MODE))) { |
adc82f77 RRD |
2522 | /* |
2523 | * Connection is NOT SS: | |
2524 | * - Connection must be FS or HS. | |
2525 | * - This FSM state should allow workaround software to | |
2526 | * run after the next USB connection. | |
2527 | */ | |
2528 | scratch |= DEFECT7374_FSM_NON_SS_CONTROL_READ; | |
5517525e | 2529 | dev->bug7734_patched = 1; |
adc82f77 RRD |
2530 | goto restore_data_eps; |
2531 | } | |
2532 | ||
2533 | /* Connection is SS: */ | |
2534 | for (ack_wait_timeout = 0; | |
2535 | ack_wait_timeout < DEFECT_7374_NUMBEROF_MAX_WAIT_LOOPS; | |
2536 | ack_wait_timeout++) { | |
2537 | ||
2538 | state = readl(&dev->plregs->pl_ep_status_1) | |
2539 | & (0xff << STATE); | |
2540 | if ((state >= (ACK_GOOD_NORMAL << STATE)) && | |
2541 | (state <= (ACK_GOOD_MORE_ACKS_TO_COME << STATE))) { | |
2542 | scratch |= DEFECT7374_FSM_SS_CONTROL_READ; | |
5517525e | 2543 | dev->bug7734_patched = 1; |
adc82f77 RRD |
2544 | break; |
2545 | } | |
2546 | ||
2547 | /* | |
2548 | * We have not yet received host's Data Phase ACK | |
2549 | * - Wait and try again. | |
2550 | */ | |
2551 | udelay(DEFECT_7374_PROCESSOR_WAIT_TIME); | |
2552 | ||
2553 | continue; | |
2554 | } | |
2555 | ||
2556 | ||
2557 | if (ack_wait_timeout >= DEFECT_7374_NUMBEROF_MAX_WAIT_LOOPS) { | |
e56e69cc | 2558 | ep_err(dev, "FAIL: Defect 7374 workaround waited but failed " |
adc82f77 | 2559 | "to detect SS host's data phase ACK."); |
e56e69cc | 2560 | ep_err(dev, "PL_EP_STATUS_1(23:16):.Expected from 0x11 to 0x16" |
adc82f77 RRD |
2561 | "got 0x%2.2x.\n", state >> STATE); |
2562 | } else { | |
e56e69cc | 2563 | ep_warn(dev, "INFO: Defect 7374 workaround waited about\n" |
adc82f77 RRD |
2564 | "%duSec for Control Read Data Phase ACK\n", |
2565 | DEFECT_7374_PROCESSOR_WAIT_TIME * ack_wait_timeout); | |
2566 | } | |
2567 | ||
2568 | restore_data_eps: | |
2569 | /* | |
2570 | * Restore data EPs to their pre-workaround settings (disabled, | |
2571 | * initialized, and other details). | |
2572 | */ | |
2573 | defect7374_disable_data_eps(dev); | |
2574 | ||
2575 | set_idx_reg(dev->regs, SCRATCH, scratch); | |
2576 | ||
2577 | return; | |
2578 | } | |
2579 | ||
e0cbb046 | 2580 | static void ep_clear_seqnum(struct net2280_ep *ep) |
adc82f77 RRD |
2581 | { |
2582 | struct net2280 *dev = ep->dev; | |
2583 | u32 val; | |
2584 | static const u32 ep_pl[9] = { 0, 3, 4, 7, 8, 2, 5, 6, 9 }; | |
2585 | ||
e0cbb046 RRD |
2586 | val = readl(&dev->plregs->pl_ep_ctrl) & ~0x1f; |
2587 | val |= ep_pl[ep->num]; | |
2588 | writel(val, &dev->plregs->pl_ep_ctrl); | |
2589 | val |= BIT(SEQUENCE_NUMBER_RESET); | |
2590 | writel(val, &dev->plregs->pl_ep_ctrl); | |
adc82f77 | 2591 | |
e0cbb046 | 2592 | return; |
adc82f77 RRD |
2593 | } |
2594 | ||
adc82f77 RRD |
2595 | static void handle_stat0_irqs_superspeed(struct net2280 *dev, |
2596 | struct net2280_ep *ep, struct usb_ctrlrequest r) | |
2597 | { | |
2598 | int tmp = 0; | |
2599 | ||
2600 | #define w_value le16_to_cpu(r.wValue) | |
2601 | #define w_index le16_to_cpu(r.wIndex) | |
2602 | #define w_length le16_to_cpu(r.wLength) | |
2603 | ||
2604 | switch (r.bRequest) { | |
2605 | struct net2280_ep *e; | |
2606 | u16 status; | |
2607 | ||
2608 | case USB_REQ_SET_CONFIGURATION: | |
2609 | dev->addressed_state = !w_value; | |
2610 | goto usb3_delegate; | |
2611 | ||
2612 | case USB_REQ_GET_STATUS: | |
2613 | switch (r.bRequestType) { | |
2614 | case (USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_DEVICE): | |
2615 | status = dev->wakeup_enable ? 0x02 : 0x00; | |
2616 | if (dev->selfpowered) | |
3e76fdcb | 2617 | status |= BIT(0); |
adc82f77 RRD |
2618 | status |= (dev->u1_enable << 2 | dev->u2_enable << 3 | |
2619 | dev->ltm_enable << 4); | |
2620 | writel(0, &dev->epregs[0].ep_irqenb); | |
2621 | set_fifo_bytecount(ep, sizeof(status)); | |
2622 | writel((__force u32) status, &dev->epregs[0].ep_data); | |
2623 | allow_status_338x(ep); | |
2624 | break; | |
2625 | ||
2626 | case (USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_ENDPOINT): | |
2627 | e = get_ep_by_addr(dev, w_index); | |
2628 | if (!e) | |
2629 | goto do_stall3; | |
2630 | status = readl(&e->regs->ep_rsp) & | |
3e76fdcb | 2631 | BIT(CLEAR_ENDPOINT_HALT); |
adc82f77 RRD |
2632 | writel(0, &dev->epregs[0].ep_irqenb); |
2633 | set_fifo_bytecount(ep, sizeof(status)); | |
2634 | writel((__force u32) status, &dev->epregs[0].ep_data); | |
2635 | allow_status_338x(ep); | |
2636 | break; | |
2637 | ||
2638 | default: | |
2639 | goto usb3_delegate; | |
2640 | } | |
2641 | break; | |
2642 | ||
2643 | case USB_REQ_CLEAR_FEATURE: | |
2644 | switch (r.bRequestType) { | |
2645 | case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE): | |
2646 | if (!dev->addressed_state) { | |
2647 | switch (w_value) { | |
2648 | case USB_DEVICE_U1_ENABLE: | |
2649 | dev->u1_enable = 0; | |
2650 | writel(readl(&dev->usb_ext->usbctl2) & | |
3e76fdcb | 2651 | ~BIT(U1_ENABLE), |
adc82f77 RRD |
2652 | &dev->usb_ext->usbctl2); |
2653 | allow_status_338x(ep); | |
2654 | goto next_endpoints3; | |
2655 | ||
2656 | case USB_DEVICE_U2_ENABLE: | |
2657 | dev->u2_enable = 0; | |
2658 | writel(readl(&dev->usb_ext->usbctl2) & | |
3e76fdcb | 2659 | ~BIT(U2_ENABLE), |
adc82f77 RRD |
2660 | &dev->usb_ext->usbctl2); |
2661 | allow_status_338x(ep); | |
2662 | goto next_endpoints3; | |
2663 | ||
2664 | case USB_DEVICE_LTM_ENABLE: | |
2665 | dev->ltm_enable = 0; | |
2666 | writel(readl(&dev->usb_ext->usbctl2) & | |
3e76fdcb | 2667 | ~BIT(LTM_ENABLE), |
adc82f77 RRD |
2668 | &dev->usb_ext->usbctl2); |
2669 | allow_status_338x(ep); | |
2670 | goto next_endpoints3; | |
2671 | ||
2672 | default: | |
2673 | break; | |
2674 | } | |
2675 | } | |
2676 | if (w_value == USB_DEVICE_REMOTE_WAKEUP) { | |
2677 | dev->wakeup_enable = 0; | |
2678 | writel(readl(&dev->usb->usbctl) & | |
3e76fdcb | 2679 | ~BIT(DEVICE_REMOTE_WAKEUP_ENABLE), |
adc82f77 RRD |
2680 | &dev->usb->usbctl); |
2681 | allow_status_338x(ep); | |
2682 | break; | |
2683 | } | |
2684 | goto usb3_delegate; | |
2685 | ||
2686 | case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_ENDPOINT): | |
2687 | e = get_ep_by_addr(dev, w_index); | |
2688 | if (!e) | |
2689 | goto do_stall3; | |
2690 | if (w_value != USB_ENDPOINT_HALT) | |
2691 | goto do_stall3; | |
e56e69cc | 2692 | ep_vdbg(dev, "%s clear halt\n", e->ep.name); |
e0cbb046 RRD |
2693 | /* |
2694 | * Workaround for SS SeqNum not cleared via | |
2695 | * Endpoint Halt (Clear) bit. select endpoint | |
2696 | */ | |
2697 | ep_clear_seqnum(e); | |
2698 | clear_halt(e); | |
adc82f77 RRD |
2699 | if (!list_empty(&e->queue) && e->td_dma) |
2700 | restart_dma(e); | |
2701 | allow_status(ep); | |
2702 | ep->stopped = 1; | |
2703 | break; | |
2704 | ||
2705 | default: | |
2706 | goto usb3_delegate; | |
2707 | } | |
2708 | break; | |
2709 | case USB_REQ_SET_FEATURE: | |
2710 | switch (r.bRequestType) { | |
2711 | case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE): | |
2712 | if (!dev->addressed_state) { | |
2713 | switch (w_value) { | |
2714 | case USB_DEVICE_U1_ENABLE: | |
2715 | dev->u1_enable = 1; | |
2716 | writel(readl(&dev->usb_ext->usbctl2) | | |
3e76fdcb | 2717 | BIT(U1_ENABLE), |
adc82f77 RRD |
2718 | &dev->usb_ext->usbctl2); |
2719 | allow_status_338x(ep); | |
2720 | goto next_endpoints3; | |
2721 | ||
2722 | case USB_DEVICE_U2_ENABLE: | |
2723 | dev->u2_enable = 1; | |
2724 | writel(readl(&dev->usb_ext->usbctl2) | | |
3e76fdcb | 2725 | BIT(U2_ENABLE), |
adc82f77 RRD |
2726 | &dev->usb_ext->usbctl2); |
2727 | allow_status_338x(ep); | |
2728 | goto next_endpoints3; | |
2729 | ||
2730 | case USB_DEVICE_LTM_ENABLE: | |
2731 | dev->ltm_enable = 1; | |
2732 | writel(readl(&dev->usb_ext->usbctl2) | | |
3e76fdcb | 2733 | BIT(LTM_ENABLE), |
adc82f77 RRD |
2734 | &dev->usb_ext->usbctl2); |
2735 | allow_status_338x(ep); | |
2736 | goto next_endpoints3; | |
2737 | default: | |
2738 | break; | |
2739 | } | |
2740 | } | |
2741 | ||
2742 | if (w_value == USB_DEVICE_REMOTE_WAKEUP) { | |
2743 | dev->wakeup_enable = 1; | |
2744 | writel(readl(&dev->usb->usbctl) | | |
3e76fdcb | 2745 | BIT(DEVICE_REMOTE_WAKEUP_ENABLE), |
adc82f77 RRD |
2746 | &dev->usb->usbctl); |
2747 | allow_status_338x(ep); | |
2748 | break; | |
2749 | } | |
2750 | goto usb3_delegate; | |
2751 | ||
2752 | case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_ENDPOINT): | |
2753 | e = get_ep_by_addr(dev, w_index); | |
2754 | if (!e || (w_value != USB_ENDPOINT_HALT)) | |
2755 | goto do_stall3; | |
cf8b1cde RRD |
2756 | ep->stopped = 1; |
2757 | if (ep->num == 0) | |
2758 | ep->dev->protocol_stall = 1; | |
2759 | else { | |
2760 | if (ep->dma) | |
e721c457 | 2761 | abort_dma(ep); |
e0cbb046 | 2762 | set_halt(ep); |
cf8b1cde | 2763 | } |
adc82f77 RRD |
2764 | allow_status_338x(ep); |
2765 | break; | |
2766 | ||
2767 | default: | |
2768 | goto usb3_delegate; | |
2769 | } | |
2770 | ||
2771 | break; | |
2772 | default: | |
2773 | ||
2774 | usb3_delegate: | |
e56e69cc | 2775 | ep_vdbg(dev, "setup %02x.%02x v%04x i%04x l%04x ep_cfg %08x\n", |
adc82f77 RRD |
2776 | r.bRequestType, r.bRequest, |
2777 | w_value, w_index, w_length, | |
2778 | readl(&ep->cfg->ep_cfg)); | |
2779 | ||
2780 | ep->responded = 0; | |
2781 | spin_unlock(&dev->lock); | |
2782 | tmp = dev->driver->setup(&dev->gadget, &r); | |
2783 | spin_lock(&dev->lock); | |
2784 | } | |
2785 | do_stall3: | |
2786 | if (tmp < 0) { | |
e56e69cc | 2787 | ep_vdbg(dev, "req %02x.%02x protocol STALL; stat %d\n", |
adc82f77 RRD |
2788 | r.bRequestType, r.bRequest, tmp); |
2789 | dev->protocol_stall = 1; | |
2790 | /* TD 9.9 Halt Endpoint test. TD 9.22 Set feature test */ | |
e0cbb046 | 2791 | set_halt(ep); |
adc82f77 RRD |
2792 | } |
2793 | ||
2794 | next_endpoints3: | |
2795 | ||
2796 | #undef w_value | |
2797 | #undef w_index | |
2798 | #undef w_length | |
2799 | ||
2800 | return; | |
2801 | } | |
2802 | ||
fae3c158 | 2803 | static void handle_stat0_irqs(struct net2280 *dev, u32 stat) |
1da177e4 LT |
2804 | { |
2805 | struct net2280_ep *ep; | |
2806 | u32 num, scratch; | |
2807 | ||
2808 | /* most of these don't need individual acks */ | |
3e76fdcb | 2809 | stat &= ~BIT(INTA_ASSERTED); |
1da177e4 LT |
2810 | if (!stat) |
2811 | return; | |
e56e69cc | 2812 | /* ep_dbg(dev, "irqstat0 %04x\n", stat); */ |
1da177e4 LT |
2813 | |
2814 | /* starting a control request? */ | |
3e76fdcb | 2815 | if (unlikely(stat & BIT(SETUP_PACKET_INTERRUPT))) { |
1da177e4 | 2816 | union { |
fae3c158 | 2817 | u32 raw[2]; |
1da177e4 LT |
2818 | struct usb_ctrlrequest r; |
2819 | } u; | |
950ee4c8 | 2820 | int tmp; |
1da177e4 LT |
2821 | struct net2280_request *req; |
2822 | ||
2823 | if (dev->gadget.speed == USB_SPEED_UNKNOWN) { | |
adc82f77 | 2824 | u32 val = readl(&dev->usb->usbstat); |
3e76fdcb | 2825 | if (val & BIT(SUPER_SPEED)) { |
adc82f77 RRD |
2826 | dev->gadget.speed = USB_SPEED_SUPER; |
2827 | usb_ep_set_maxpacket_limit(&dev->ep[0].ep, | |
2828 | EP0_SS_MAX_PACKET_SIZE); | |
3e76fdcb | 2829 | } else if (val & BIT(HIGH_SPEED)) { |
1da177e4 | 2830 | dev->gadget.speed = USB_SPEED_HIGH; |
adc82f77 RRD |
2831 | usb_ep_set_maxpacket_limit(&dev->ep[0].ep, |
2832 | EP0_HS_MAX_PACKET_SIZE); | |
2833 | } else { | |
1da177e4 | 2834 | dev->gadget.speed = USB_SPEED_FULL; |
adc82f77 RRD |
2835 | usb_ep_set_maxpacket_limit(&dev->ep[0].ep, |
2836 | EP0_HS_MAX_PACKET_SIZE); | |
2837 | } | |
fae3c158 | 2838 | net2280_led_speed(dev, dev->gadget.speed); |
e56e69cc | 2839 | ep_dbg(dev, "%s\n", |
fae3c158 | 2840 | usb_speed_string(dev->gadget.speed)); |
1da177e4 LT |
2841 | } |
2842 | ||
fae3c158 | 2843 | ep = &dev->ep[0]; |
1da177e4 LT |
2844 | ep->irqs++; |
2845 | ||
2846 | /* make sure any leftover request state is cleared */ | |
3e76fdcb | 2847 | stat &= ~BIT(ENDPOINT_0_INTERRUPT); |
fae3c158 RRD |
2848 | while (!list_empty(&ep->queue)) { |
2849 | req = list_entry(ep->queue.next, | |
1da177e4 | 2850 | struct net2280_request, queue); |
fae3c158 | 2851 | done(ep, req, (req->req.actual == req->req.length) |
1da177e4 LT |
2852 | ? 0 : -EPROTO); |
2853 | } | |
2854 | ep->stopped = 0; | |
2855 | dev->protocol_stall = 0; | |
5d1b6840 | 2856 | if (!(dev->quirks & PLX_SUPERSPEED)) { |
2eeb0016 | 2857 | if (ep->dev->quirks & PLX_2280) |
3e76fdcb RRD |
2858 | tmp = BIT(FIFO_OVERFLOW) | |
2859 | BIT(FIFO_UNDERFLOW); | |
adc82f77 RRD |
2860 | else |
2861 | tmp = 0; | |
2862 | ||
3e76fdcb RRD |
2863 | writel(tmp | BIT(TIMEOUT) | |
2864 | BIT(USB_STALL_SENT) | | |
2865 | BIT(USB_IN_NAK_SENT) | | |
2866 | BIT(USB_IN_ACK_RCVD) | | |
2867 | BIT(USB_OUT_PING_NAK_SENT) | | |
2868 | BIT(USB_OUT_ACK_SENT) | | |
2869 | BIT(SHORT_PACKET_OUT_DONE_INTERRUPT) | | |
2870 | BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT) | | |
2871 | BIT(DATA_PACKET_RECEIVED_INTERRUPT) | | |
2872 | BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) | | |
2873 | BIT(DATA_OUT_PING_TOKEN_INTERRUPT) | | |
ae8e530a RRD |
2874 | BIT(DATA_IN_TOKEN_INTERRUPT), |
2875 | &ep->regs->ep_stat); | |
adc82f77 RRD |
2876 | } |
2877 | u.raw[0] = readl(&dev->usb->setup0123); | |
2878 | u.raw[1] = readl(&dev->usb->setup4567); | |
901b3d75 | 2879 | |
fae3c158 RRD |
2880 | cpu_to_le32s(&u.raw[0]); |
2881 | cpu_to_le32s(&u.raw[1]); | |
1da177e4 | 2882 | |
5517525e | 2883 | if ((dev->quirks & PLX_SUPERSPEED) && !dev->bug7734_patched) |
adc82f77 RRD |
2884 | defect7374_workaround(dev, u.r); |
2885 | ||
950ee4c8 GL |
2886 | tmp = 0; |
2887 | ||
01ee7d70 DB |
2888 | #define w_value le16_to_cpu(u.r.wValue) |
2889 | #define w_index le16_to_cpu(u.r.wIndex) | |
2890 | #define w_length le16_to_cpu(u.r.wLength) | |
1da177e4 LT |
2891 | |
2892 | /* ack the irq */ | |
3e76fdcb RRD |
2893 | writel(BIT(SETUP_PACKET_INTERRUPT), &dev->regs->irqstat0); |
2894 | stat ^= BIT(SETUP_PACKET_INTERRUPT); | |
1da177e4 LT |
2895 | |
2896 | /* watch control traffic at the token level, and force | |
2897 | * synchronization before letting the status stage happen. | |
2898 | * FIXME ignore tokens we'll NAK, until driver responds. | |
2899 | * that'll mean a lot less irqs for some drivers. | |
2900 | */ | |
2901 | ep->is_in = (u.r.bRequestType & USB_DIR_IN) != 0; | |
2902 | if (ep->is_in) { | |
3e76fdcb RRD |
2903 | scratch = BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) | |
2904 | BIT(DATA_OUT_PING_TOKEN_INTERRUPT) | | |
2905 | BIT(DATA_IN_TOKEN_INTERRUPT); | |
fae3c158 | 2906 | stop_out_naking(ep); |
1da177e4 | 2907 | } else |
3e76fdcb RRD |
2908 | scratch = BIT(DATA_PACKET_RECEIVED_INTERRUPT) | |
2909 | BIT(DATA_OUT_PING_TOKEN_INTERRUPT) | | |
2910 | BIT(DATA_IN_TOKEN_INTERRUPT); | |
fae3c158 | 2911 | writel(scratch, &dev->epregs[0].ep_irqenb); |
1da177e4 LT |
2912 | |
2913 | /* we made the hardware handle most lowlevel requests; | |
2914 | * everything else goes uplevel to the gadget code. | |
2915 | */ | |
1f26e28d | 2916 | ep->responded = 1; |
adc82f77 RRD |
2917 | |
2918 | if (dev->gadget.speed == USB_SPEED_SUPER) { | |
2919 | handle_stat0_irqs_superspeed(dev, ep, u.r); | |
2920 | goto next_endpoints; | |
2921 | } | |
2922 | ||
1da177e4 LT |
2923 | switch (u.r.bRequest) { |
2924 | case USB_REQ_GET_STATUS: { | |
2925 | struct net2280_ep *e; | |
320f3459 | 2926 | __le32 status; |
1da177e4 LT |
2927 | |
2928 | /* hw handles device and interface status */ | |
2929 | if (u.r.bRequestType != (USB_DIR_IN|USB_RECIP_ENDPOINT)) | |
2930 | goto delegate; | |
fae3c158 RRD |
2931 | e = get_ep_by_addr(dev, w_index); |
2932 | if (!e || w_length > 2) | |
1da177e4 LT |
2933 | goto do_stall; |
2934 | ||
3e76fdcb | 2935 | if (readl(&e->regs->ep_rsp) & BIT(SET_ENDPOINT_HALT)) |
fae3c158 | 2936 | status = cpu_to_le32(1); |
1da177e4 | 2937 | else |
fae3c158 | 2938 | status = cpu_to_le32(0); |
1da177e4 LT |
2939 | |
2940 | /* don't bother with a request object! */ | |
fae3c158 RRD |
2941 | writel(0, &dev->epregs[0].ep_irqenb); |
2942 | set_fifo_bytecount(ep, w_length); | |
2943 | writel((__force u32)status, &dev->epregs[0].ep_data); | |
2944 | allow_status(ep); | |
e56e69cc | 2945 | ep_vdbg(dev, "%s stat %02x\n", ep->ep.name, status); |
1da177e4 LT |
2946 | goto next_endpoints; |
2947 | } | |
2948 | break; | |
2949 | case USB_REQ_CLEAR_FEATURE: { | |
2950 | struct net2280_ep *e; | |
2951 | ||
2952 | /* hw handles device features */ | |
2953 | if (u.r.bRequestType != USB_RECIP_ENDPOINT) | |
2954 | goto delegate; | |
ae8e530a | 2955 | if (w_value != USB_ENDPOINT_HALT || w_length != 0) |
1da177e4 | 2956 | goto do_stall; |
fae3c158 RRD |
2957 | e = get_ep_by_addr(dev, w_index); |
2958 | if (!e) | |
1da177e4 | 2959 | goto do_stall; |
8066134f | 2960 | if (e->wedged) { |
e56e69cc | 2961 | ep_vdbg(dev, "%s wedged, halt not cleared\n", |
8066134f AS |
2962 | ep->ep.name); |
2963 | } else { | |
e56e69cc | 2964 | ep_vdbg(dev, "%s clear halt\n", e->ep.name); |
8066134f | 2965 | clear_halt(e); |
2eeb0016 | 2966 | if ((ep->dev->quirks & PLX_SUPERSPEED) && |
adc82f77 RRD |
2967 | !list_empty(&e->queue) && e->td_dma) |
2968 | restart_dma(e); | |
8066134f | 2969 | } |
fae3c158 | 2970 | allow_status(ep); |
1da177e4 LT |
2971 | goto next_endpoints; |
2972 | } | |
2973 | break; | |
2974 | case USB_REQ_SET_FEATURE: { | |
2975 | struct net2280_ep *e; | |
2976 | ||
2977 | /* hw handles device features */ | |
2978 | if (u.r.bRequestType != USB_RECIP_ENDPOINT) | |
2979 | goto delegate; | |
ae8e530a | 2980 | if (w_value != USB_ENDPOINT_HALT || w_length != 0) |
1da177e4 | 2981 | goto do_stall; |
fae3c158 RRD |
2982 | e = get_ep_by_addr(dev, w_index); |
2983 | if (!e) | |
1da177e4 | 2984 | goto do_stall; |
8066134f AS |
2985 | if (e->ep.name == ep0name) |
2986 | goto do_stall; | |
fae3c158 | 2987 | set_halt(e); |
2eeb0016 | 2988 | if ((dev->quirks & PLX_SUPERSPEED) && e->dma) |
adc82f77 | 2989 | abort_dma(e); |
fae3c158 | 2990 | allow_status(ep); |
e56e69cc | 2991 | ep_vdbg(dev, "%s set halt\n", ep->ep.name); |
1da177e4 LT |
2992 | goto next_endpoints; |
2993 | } | |
2994 | break; | |
2995 | default: | |
2996 | delegate: | |
e56e69cc | 2997 | ep_vdbg(dev, "setup %02x.%02x v%04x i%04x l%04x " |
1da177e4 LT |
2998 | "ep_cfg %08x\n", |
2999 | u.r.bRequestType, u.r.bRequest, | |
320f3459 | 3000 | w_value, w_index, w_length, |
adc82f77 | 3001 | readl(&ep->cfg->ep_cfg)); |
1f26e28d | 3002 | ep->responded = 0; |
fae3c158 RRD |
3003 | spin_unlock(&dev->lock); |
3004 | tmp = dev->driver->setup(&dev->gadget, &u.r); | |
3005 | spin_lock(&dev->lock); | |
1da177e4 LT |
3006 | } |
3007 | ||
3008 | /* stall ep0 on error */ | |
3009 | if (tmp < 0) { | |
3010 | do_stall: | |
e56e69cc | 3011 | ep_vdbg(dev, "req %02x.%02x protocol STALL; stat %d\n", |
1da177e4 LT |
3012 | u.r.bRequestType, u.r.bRequest, tmp); |
3013 | dev->protocol_stall = 1; | |
3014 | } | |
3015 | ||
3016 | /* some in/out token irq should follow; maybe stall then. | |
3017 | * driver must queue a request (even zlp) or halt ep0 | |
3018 | * before the host times out. | |
3019 | */ | |
3020 | } | |
3021 | ||
320f3459 DB |
3022 | #undef w_value |
3023 | #undef w_index | |
3024 | #undef w_length | |
3025 | ||
1da177e4 LT |
3026 | next_endpoints: |
3027 | /* endpoint data irq ? */ | |
3028 | scratch = stat & 0x7f; | |
3029 | stat &= ~0x7f; | |
3030 | for (num = 0; scratch; num++) { | |
3031 | u32 t; | |
3032 | ||
3033 | /* do this endpoint's FIFO and queue need tending? */ | |
3e76fdcb | 3034 | t = BIT(num); |
1da177e4 LT |
3035 | if ((scratch & t) == 0) |
3036 | continue; | |
3037 | scratch ^= t; | |
3038 | ||
fae3c158 RRD |
3039 | ep = &dev->ep[num]; |
3040 | handle_ep_small(ep); | |
1da177e4 LT |
3041 | } |
3042 | ||
3043 | if (stat) | |
e56e69cc | 3044 | ep_dbg(dev, "unhandled irqstat0 %08x\n", stat); |
1da177e4 LT |
3045 | } |
3046 | ||
3e76fdcb RRD |
3047 | #define DMA_INTERRUPTS (BIT(DMA_D_INTERRUPT) | \ |
3048 | BIT(DMA_C_INTERRUPT) | \ | |
3049 | BIT(DMA_B_INTERRUPT) | \ | |
3050 | BIT(DMA_A_INTERRUPT)) | |
1da177e4 | 3051 | #define PCI_ERROR_INTERRUPTS ( \ |
3e76fdcb RRD |
3052 | BIT(PCI_MASTER_ABORT_RECEIVED_INTERRUPT) | \ |
3053 | BIT(PCI_TARGET_ABORT_RECEIVED_INTERRUPT) | \ | |
3054 | BIT(PCI_RETRY_ABORT_INTERRUPT)) | |
1da177e4 | 3055 | |
fae3c158 | 3056 | static void handle_stat1_irqs(struct net2280 *dev, u32 stat) |
1da177e4 LT |
3057 | { |
3058 | struct net2280_ep *ep; | |
3059 | u32 tmp, num, mask, scratch; | |
3060 | ||
3061 | /* after disconnect there's nothing else to do! */ | |
3e76fdcb RRD |
3062 | tmp = BIT(VBUS_INTERRUPT) | BIT(ROOT_PORT_RESET_INTERRUPT); |
3063 | mask = BIT(SUPER_SPEED) | BIT(HIGH_SPEED) | BIT(FULL_SPEED); | |
1da177e4 LT |
3064 | |
3065 | /* VBUS disconnect is indicated by VBUS_PIN and VBUS_INTERRUPT set. | |
fb914ebf | 3066 | * Root Port Reset is indicated by ROOT_PORT_RESET_INTERRUPT set and |
901b3d75 | 3067 | * both HIGH_SPEED and FULL_SPEED clear (as ROOT_PORT_RESET_INTERRUPT |
1da177e4 LT |
3068 | * only indicates a change in the reset state). |
3069 | */ | |
3070 | if (stat & tmp) { | |
b611e424 AS |
3071 | bool reset = false; |
3072 | bool disconnect = false; | |
3073 | ||
3074 | /* | |
3075 | * Ignore disconnects and resets if the speed hasn't been set. | |
3076 | * VBUS can bounce and there's always an initial reset. | |
3077 | */ | |
fae3c158 | 3078 | writel(tmp, &dev->regs->irqstat1); |
b611e424 AS |
3079 | if (dev->gadget.speed != USB_SPEED_UNKNOWN) { |
3080 | if ((stat & BIT(VBUS_INTERRUPT)) && | |
3081 | (readl(&dev->usb->usbctl) & | |
3082 | BIT(VBUS_PIN)) == 0) { | |
3083 | disconnect = true; | |
3084 | ep_dbg(dev, "disconnect %s\n", | |
3085 | dev->driver->driver.name); | |
3086 | } else if ((stat & BIT(ROOT_PORT_RESET_INTERRUPT)) && | |
3087 | (readl(&dev->usb->usbstat) & mask) | |
3088 | == 0) { | |
3089 | reset = true; | |
3090 | ep_dbg(dev, "reset %s\n", | |
3091 | dev->driver->driver.name); | |
3092 | } | |
3093 | ||
3094 | if (disconnect || reset) { | |
3095 | stop_activity(dev, dev->driver); | |
3096 | ep0_start(dev); | |
3097 | spin_unlock(&dev->lock); | |
3098 | if (reset) | |
3099 | usb_gadget_udc_reset | |
3100 | (&dev->gadget, dev->driver); | |
3101 | else | |
3102 | (dev->driver->disconnect) | |
3103 | (&dev->gadget); | |
3104 | spin_lock(&dev->lock); | |
3105 | return; | |
3106 | } | |
1da177e4 LT |
3107 | } |
3108 | stat &= ~tmp; | |
3109 | ||
3110 | /* vBUS can bounce ... one of many reasons to ignore the | |
3111 | * notion of hotplug events on bus connect/disconnect! | |
3112 | */ | |
3113 | if (!stat) | |
3114 | return; | |
3115 | } | |
3116 | ||
3117 | /* NOTE: chip stays in PCI D0 state for now, but it could | |
3118 | * enter D1 to save more power | |
3119 | */ | |
3e76fdcb | 3120 | tmp = BIT(SUSPEND_REQUEST_CHANGE_INTERRUPT); |
1da177e4 | 3121 | if (stat & tmp) { |
fae3c158 | 3122 | writel(tmp, &dev->regs->irqstat1); |
3e76fdcb | 3123 | if (stat & BIT(SUSPEND_REQUEST_INTERRUPT)) { |
1da177e4 | 3124 | if (dev->driver->suspend) |
fae3c158 | 3125 | dev->driver->suspend(&dev->gadget); |
1da177e4 | 3126 | if (!enable_suspend) |
3e76fdcb | 3127 | stat &= ~BIT(SUSPEND_REQUEST_INTERRUPT); |
1da177e4 LT |
3128 | } else { |
3129 | if (dev->driver->resume) | |
fae3c158 | 3130 | dev->driver->resume(&dev->gadget); |
1da177e4 LT |
3131 | /* at high speed, note erratum 0133 */ |
3132 | } | |
3133 | stat &= ~tmp; | |
3134 | } | |
3135 | ||
3136 | /* clear any other status/irqs */ | |
3137 | if (stat) | |
fae3c158 | 3138 | writel(stat, &dev->regs->irqstat1); |
1da177e4 LT |
3139 | |
3140 | /* some status we can just ignore */ | |
2eeb0016 | 3141 | if (dev->quirks & PLX_2280) |
3e76fdcb RRD |
3142 | stat &= ~(BIT(CONTROL_STATUS_INTERRUPT) | |
3143 | BIT(SUSPEND_REQUEST_INTERRUPT) | | |
3144 | BIT(RESUME_INTERRUPT) | | |
3145 | BIT(SOF_INTERRUPT)); | |
950ee4c8 | 3146 | else |
3e76fdcb RRD |
3147 | stat &= ~(BIT(CONTROL_STATUS_INTERRUPT) | |
3148 | BIT(RESUME_INTERRUPT) | | |
3149 | BIT(SOF_DOWN_INTERRUPT) | | |
3150 | BIT(SOF_INTERRUPT)); | |
950ee4c8 | 3151 | |
1da177e4 LT |
3152 | if (!stat) |
3153 | return; | |
e56e69cc | 3154 | /* ep_dbg(dev, "irqstat1 %08x\n", stat);*/ |
1da177e4 LT |
3155 | |
3156 | /* DMA status, for ep-{a,b,c,d} */ | |
3157 | scratch = stat & DMA_INTERRUPTS; | |
3158 | stat &= ~DMA_INTERRUPTS; | |
3159 | scratch >>= 9; | |
3160 | for (num = 0; scratch; num++) { | |
3161 | struct net2280_dma_regs __iomem *dma; | |
3162 | ||
3e76fdcb | 3163 | tmp = BIT(num); |
1da177e4 LT |
3164 | if ((tmp & scratch) == 0) |
3165 | continue; | |
3166 | scratch ^= tmp; | |
3167 | ||
fae3c158 | 3168 | ep = &dev->ep[num + 1]; |
1da177e4 LT |
3169 | dma = ep->dma; |
3170 | ||
3171 | if (!dma) | |
3172 | continue; | |
3173 | ||
3174 | /* clear ep's dma status */ | |
fae3c158 RRD |
3175 | tmp = readl(&dma->dmastat); |
3176 | writel(tmp, &dma->dmastat); | |
1da177e4 | 3177 | |
adc82f77 | 3178 | /* dma sync*/ |
2eeb0016 | 3179 | if (dev->quirks & PLX_SUPERSPEED) { |
adc82f77 RRD |
3180 | u32 r_dmacount = readl(&dma->dmacount); |
3181 | if (!ep->is_in && (r_dmacount & 0x00FFFFFF) && | |
3e76fdcb | 3182 | (tmp & BIT(DMA_TRANSACTION_DONE_INTERRUPT))) |
adc82f77 RRD |
3183 | continue; |
3184 | } | |
3185 | ||
90664198 RRD |
3186 | if (!(tmp & BIT(DMA_TRANSACTION_DONE_INTERRUPT))) { |
3187 | ep_dbg(ep->dev, "%s no xact done? %08x\n", | |
3188 | ep->ep.name, tmp); | |
3189 | continue; | |
1da177e4 | 3190 | } |
90664198 | 3191 | stop_dma(ep->dma); |
1da177e4 LT |
3192 | |
3193 | /* OUT transfers terminate when the data from the | |
3194 | * host is in our memory. Process whatever's done. | |
3195 | * On this path, we know transfer's last packet wasn't | |
3196 | * less than req->length. NAK_OUT_PACKETS may be set, | |
3197 | * or the FIFO may already be holding new packets. | |
3198 | * | |
3199 | * IN transfers can linger in the FIFO for a very | |
3200 | * long time ... we ignore that for now, accounting | |
3201 | * precisely (like PIO does) needs per-packet irqs | |
3202 | */ | |
fae3c158 | 3203 | scan_dma_completions(ep); |
1da177e4 LT |
3204 | |
3205 | /* disable dma on inactive queues; else maybe restart */ | |
90664198 | 3206 | if (!list_empty(&ep->queue)) { |
fae3c158 | 3207 | tmp = readl(&dma->dmactl); |
90664198 | 3208 | restart_dma(ep); |
1da177e4 LT |
3209 | } |
3210 | ep->irqs++; | |
3211 | } | |
3212 | ||
3213 | /* NOTE: there are other PCI errors we might usefully notice. | |
3214 | * if they appear very often, here's where to try recovering. | |
3215 | */ | |
3216 | if (stat & PCI_ERROR_INTERRUPTS) { | |
e56e69cc | 3217 | ep_err(dev, "pci dma error; stat %08x\n", stat); |
1da177e4 LT |
3218 | stat &= ~PCI_ERROR_INTERRUPTS; |
3219 | /* these are fatal errors, but "maybe" they won't | |
3220 | * happen again ... | |
3221 | */ | |
fae3c158 RRD |
3222 | stop_activity(dev, dev->driver); |
3223 | ep0_start(dev); | |
1da177e4 LT |
3224 | stat = 0; |
3225 | } | |
3226 | ||
3227 | if (stat) | |
e56e69cc | 3228 | ep_dbg(dev, "unhandled irqstat1 %08x\n", stat); |
1da177e4 LT |
3229 | } |
3230 | ||
fae3c158 | 3231 | static irqreturn_t net2280_irq(int irq, void *_dev) |
1da177e4 LT |
3232 | { |
3233 | struct net2280 *dev = _dev; | |
3234 | ||
658ad5e0 | 3235 | /* shared interrupt, not ours */ |
2eeb0016 | 3236 | if ((dev->quirks & PLX_LEGACY) && |
3e76fdcb | 3237 | (!(readl(&dev->regs->irqstat0) & BIT(INTA_ASSERTED)))) |
658ad5e0 AS |
3238 | return IRQ_NONE; |
3239 | ||
fae3c158 | 3240 | spin_lock(&dev->lock); |
1da177e4 LT |
3241 | |
3242 | /* handle disconnect, dma, and more */ | |
fae3c158 | 3243 | handle_stat1_irqs(dev, readl(&dev->regs->irqstat1)); |
1da177e4 LT |
3244 | |
3245 | /* control requests and PIO */ | |
fae3c158 | 3246 | handle_stat0_irqs(dev, readl(&dev->regs->irqstat0)); |
1da177e4 | 3247 | |
2eeb0016 | 3248 | if (dev->quirks & PLX_SUPERSPEED) { |
adc82f77 RRD |
3249 | /* re-enable interrupt to trigger any possible new interrupt */ |
3250 | u32 pciirqenb1 = readl(&dev->regs->pciirqenb1); | |
3251 | writel(pciirqenb1 & 0x7FFFFFFF, &dev->regs->pciirqenb1); | |
3252 | writel(pciirqenb1, &dev->regs->pciirqenb1); | |
3253 | } | |
3254 | ||
fae3c158 | 3255 | spin_unlock(&dev->lock); |
1da177e4 LT |
3256 | |
3257 | return IRQ_HANDLED; | |
3258 | } | |
3259 | ||
3260 | /*-------------------------------------------------------------------------*/ | |
3261 | ||
fae3c158 | 3262 | static void gadget_release(struct device *_dev) |
1da177e4 | 3263 | { |
fae3c158 | 3264 | struct net2280 *dev = dev_get_drvdata(_dev); |
1da177e4 | 3265 | |
fae3c158 | 3266 | kfree(dev); |
1da177e4 LT |
3267 | } |
3268 | ||
3269 | /* tear down the binding between this driver and the pci device */ | |
3270 | ||
fae3c158 | 3271 | static void net2280_remove(struct pci_dev *pdev) |
1da177e4 | 3272 | { |
fae3c158 | 3273 | struct net2280 *dev = pci_get_drvdata(pdev); |
1da177e4 | 3274 | |
0f91349b SAS |
3275 | usb_del_gadget_udc(&dev->gadget); |
3276 | ||
6bea476c | 3277 | BUG_ON(dev->driver); |
1da177e4 LT |
3278 | |
3279 | /* then clean up the resources we allocated during probe() */ | |
fae3c158 | 3280 | net2280_led_shutdown(dev); |
1da177e4 LT |
3281 | if (dev->requests) { |
3282 | int i; | |
3283 | for (i = 1; i < 5; i++) { | |
fae3c158 | 3284 | if (!dev->ep[i].dummy) |
1da177e4 | 3285 | continue; |
fae3c158 RRD |
3286 | pci_pool_free(dev->requests, dev->ep[i].dummy, |
3287 | dev->ep[i].td_dma); | |
1da177e4 | 3288 | } |
fae3c158 | 3289 | pci_pool_destroy(dev->requests); |
1da177e4 LT |
3290 | } |
3291 | if (dev->got_irq) | |
fae3c158 | 3292 | free_irq(pdev->irq, dev); |
9c864c23 | 3293 | if (dev->quirks & PLX_SUPERSPEED) |
adc82f77 | 3294 | pci_disable_msi(pdev); |
1da177e4 | 3295 | if (dev->regs) |
fae3c158 | 3296 | iounmap(dev->regs); |
1da177e4 | 3297 | if (dev->region) |
fae3c158 RRD |
3298 | release_mem_region(pci_resource_start(pdev, 0), |
3299 | pci_resource_len(pdev, 0)); | |
1da177e4 | 3300 | if (dev->enabled) |
fae3c158 RRD |
3301 | pci_disable_device(pdev); |
3302 | device_remove_file(&pdev->dev, &dev_attr_registers); | |
1da177e4 | 3303 | |
e56e69cc | 3304 | ep_info(dev, "unbind\n"); |
1da177e4 LT |
3305 | } |
3306 | ||
3307 | /* wrap this driver around the specified device, but | |
3308 | * don't respond over USB until a gadget driver binds to us. | |
3309 | */ | |
3310 | ||
fae3c158 | 3311 | static int net2280_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
1da177e4 LT |
3312 | { |
3313 | struct net2280 *dev; | |
3314 | unsigned long resource, len; | |
3315 | void __iomem *base = NULL; | |
3316 | int retval, i; | |
1da177e4 | 3317 | |
1da177e4 | 3318 | /* alloc, and start init */ |
fae3c158 RRD |
3319 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
3320 | if (dev == NULL) { | |
1da177e4 LT |
3321 | retval = -ENOMEM; |
3322 | goto done; | |
3323 | } | |
3324 | ||
fae3c158 RRD |
3325 | pci_set_drvdata(pdev, dev); |
3326 | spin_lock_init(&dev->lock); | |
2eeb0016 | 3327 | dev->quirks = id->driver_data; |
1da177e4 LT |
3328 | dev->pdev = pdev; |
3329 | dev->gadget.ops = &net2280_ops; | |
2eeb0016 | 3330 | dev->gadget.max_speed = (dev->quirks & PLX_SUPERSPEED) ? |
adc82f77 | 3331 | USB_SPEED_SUPER : USB_SPEED_HIGH; |
1da177e4 LT |
3332 | |
3333 | /* the "gadget" abstracts/virtualizes the controller */ | |
1da177e4 LT |
3334 | dev->gadget.name = driver_name; |
3335 | ||
3336 | /* now all the pci goodies ... */ | |
fae3c158 RRD |
3337 | if (pci_enable_device(pdev) < 0) { |
3338 | retval = -ENODEV; | |
1da177e4 LT |
3339 | goto done; |
3340 | } | |
3341 | dev->enabled = 1; | |
3342 | ||
3343 | /* BAR 0 holds all the registers | |
3344 | * BAR 1 is 8051 memory; unused here (note erratum 0103) | |
3345 | * BAR 2 is fifo memory; unused here | |
3346 | */ | |
fae3c158 RRD |
3347 | resource = pci_resource_start(pdev, 0); |
3348 | len = pci_resource_len(pdev, 0); | |
3349 | if (!request_mem_region(resource, len, driver_name)) { | |
e56e69cc | 3350 | ep_dbg(dev, "controller already in use\n"); |
1da177e4 LT |
3351 | retval = -EBUSY; |
3352 | goto done; | |
3353 | } | |
3354 | dev->region = 1; | |
3355 | ||
901b3d75 DB |
3356 | /* FIXME provide firmware download interface to put |
3357 | * 8051 code into the chip, e.g. to turn on PCI PM. | |
3358 | */ | |
3359 | ||
fae3c158 | 3360 | base = ioremap_nocache(resource, len); |
1da177e4 | 3361 | if (base == NULL) { |
e56e69cc | 3362 | ep_dbg(dev, "can't map memory\n"); |
1da177e4 LT |
3363 | retval = -EFAULT; |
3364 | goto done; | |
3365 | } | |
3366 | dev->regs = (struct net2280_regs __iomem *) base; | |
3367 | dev->usb = (struct net2280_usb_regs __iomem *) (base + 0x0080); | |
3368 | dev->pci = (struct net2280_pci_regs __iomem *) (base + 0x0100); | |
3369 | dev->dma = (struct net2280_dma_regs __iomem *) (base + 0x0180); | |
3370 | dev->dep = (struct net2280_dep_regs __iomem *) (base + 0x0200); | |
3371 | dev->epregs = (struct net2280_ep_regs __iomem *) (base + 0x0300); | |
3372 | ||
2eeb0016 | 3373 | if (dev->quirks & PLX_SUPERSPEED) { |
adc82f77 RRD |
3374 | u32 fsmvalue; |
3375 | u32 usbstat; | |
3376 | dev->usb_ext = (struct usb338x_usb_ext_regs __iomem *) | |
3377 | (base + 0x00b4); | |
3378 | dev->fiforegs = (struct usb338x_fifo_regs __iomem *) | |
3379 | (base + 0x0500); | |
3380 | dev->llregs = (struct usb338x_ll_regs __iomem *) | |
3381 | (base + 0x0700); | |
3382 | dev->ll_lfps_regs = (struct usb338x_ll_lfps_regs __iomem *) | |
3383 | (base + 0x0748); | |
3384 | dev->ll_tsn_regs = (struct usb338x_ll_tsn_regs __iomem *) | |
3385 | (base + 0x077c); | |
3386 | dev->ll_chicken_reg = (struct usb338x_ll_chi_regs __iomem *) | |
3387 | (base + 0x079c); | |
3388 | dev->plregs = (struct usb338x_pl_regs __iomem *) | |
3389 | (base + 0x0800); | |
3390 | usbstat = readl(&dev->usb->usbstat); | |
fae3c158 | 3391 | dev->enhanced_mode = !!(usbstat & BIT(11)); |
adc82f77 RRD |
3392 | dev->n_ep = (dev->enhanced_mode) ? 9 : 5; |
3393 | /* put into initial config, link up all endpoints */ | |
3394 | fsmvalue = get_idx_reg(dev->regs, SCRATCH) & | |
3395 | (0xf << DEFECT7374_FSM_FIELD); | |
3396 | /* See if firmware needs to set up for workaround: */ | |
5517525e RRD |
3397 | if (fsmvalue == DEFECT7374_FSM_SS_CONTROL_READ) { |
3398 | dev->bug7734_patched = 1; | |
adc82f77 | 3399 | writel(0, &dev->usb->usbctl); |
5517525e RRD |
3400 | } else |
3401 | dev->bug7734_patched = 0; | |
3402 | } else { | |
adc82f77 RRD |
3403 | dev->enhanced_mode = 0; |
3404 | dev->n_ep = 7; | |
3405 | /* put into initial config, link up all endpoints */ | |
3406 | writel(0, &dev->usb->usbctl); | |
3407 | } | |
3408 | ||
fae3c158 RRD |
3409 | usb_reset(dev); |
3410 | usb_reinit(dev); | |
1da177e4 LT |
3411 | |
3412 | /* irq setup after old hardware is cleaned up */ | |
3413 | if (!pdev->irq) { | |
e56e69cc | 3414 | ep_err(dev, "No IRQ. Check PCI setup!\n"); |
1da177e4 LT |
3415 | retval = -ENODEV; |
3416 | goto done; | |
3417 | } | |
c6387a48 | 3418 | |
9c864c23 | 3419 | if (dev->quirks & PLX_SUPERSPEED) |
adc82f77 | 3420 | if (pci_enable_msi(pdev)) |
e56e69cc | 3421 | ep_err(dev, "Failed to enable MSI mode\n"); |
adc82f77 | 3422 | |
fae3c158 RRD |
3423 | if (request_irq(pdev->irq, net2280_irq, IRQF_SHARED, |
3424 | driver_name, dev)) { | |
e56e69cc | 3425 | ep_err(dev, "request interrupt %d failed\n", pdev->irq); |
1da177e4 LT |
3426 | retval = -EBUSY; |
3427 | goto done; | |
3428 | } | |
3429 | dev->got_irq = 1; | |
3430 | ||
3431 | /* DMA setup */ | |
3432 | /* NOTE: we know only the 32 LSBs of dma addresses may be nonzero */ | |
fae3c158 RRD |
3433 | dev->requests = pci_pool_create("requests", pdev, |
3434 | sizeof(struct net2280_dma), | |
1da177e4 LT |
3435 | 0 /* no alignment requirements */, |
3436 | 0 /* or page-crossing issues */); | |
3437 | if (!dev->requests) { | |
e56e69cc | 3438 | ep_dbg(dev, "can't get request pool\n"); |
1da177e4 LT |
3439 | retval = -ENOMEM; |
3440 | goto done; | |
3441 | } | |
3442 | for (i = 1; i < 5; i++) { | |
3443 | struct net2280_dma *td; | |
3444 | ||
fae3c158 RRD |
3445 | td = pci_pool_alloc(dev->requests, GFP_KERNEL, |
3446 | &dev->ep[i].td_dma); | |
1da177e4 | 3447 | if (!td) { |
e56e69cc | 3448 | ep_dbg(dev, "can't get dummy %d\n", i); |
1da177e4 LT |
3449 | retval = -ENOMEM; |
3450 | goto done; | |
3451 | } | |
3452 | td->dmacount = 0; /* not VALID */ | |
1da177e4 | 3453 | td->dmadesc = td->dmaaddr; |
fae3c158 | 3454 | dev->ep[i].dummy = td; |
1da177e4 LT |
3455 | } |
3456 | ||
3457 | /* enable lower-overhead pci memory bursts during DMA */ | |
2eeb0016 | 3458 | if (dev->quirks & PLX_LEGACY) |
3e76fdcb RRD |
3459 | writel(BIT(DMA_MEMORY_WRITE_AND_INVALIDATE_ENABLE) | |
3460 | /* | |
3461 | * 256 write retries may not be enough... | |
3462 | BIT(PCI_RETRY_ABORT_ENABLE) | | |
3463 | */ | |
3464 | BIT(DMA_READ_MULTIPLE_ENABLE) | | |
3465 | BIT(DMA_READ_LINE_ENABLE), | |
3466 | &dev->pci->pcimstctl); | |
1da177e4 | 3467 | /* erratum 0115 shouldn't appear: Linux inits PCI_LATENCY_TIMER */ |
fae3c158 RRD |
3468 | pci_set_master(pdev); |
3469 | pci_try_set_mwi(pdev); | |
1da177e4 LT |
3470 | |
3471 | /* ... also flushes any posted pci writes */ | |
fae3c158 | 3472 | dev->chiprev = get_idx_reg(dev->regs, REG_CHIPREV) & 0xffff; |
1da177e4 LT |
3473 | |
3474 | /* done */ | |
e56e69cc RRD |
3475 | ep_info(dev, "%s\n", driver_desc); |
3476 | ep_info(dev, "irq %d, pci mem %p, chip rev %04x\n", | |
c6387a48 | 3477 | pdev->irq, base, dev->chiprev); |
d588ff58 | 3478 | ep_info(dev, "version: " DRIVER_VERSION "; %s\n", |
adc82f77 | 3479 | dev->enhanced_mode ? "enhanced mode" : "legacy mode"); |
fae3c158 RRD |
3480 | retval = device_create_file(&pdev->dev, &dev_attr_registers); |
3481 | if (retval) | |
3482 | goto done; | |
1da177e4 | 3483 | |
2901df68 FB |
3484 | retval = usb_add_gadget_udc_release(&pdev->dev, &dev->gadget, |
3485 | gadget_release); | |
0f91349b SAS |
3486 | if (retval) |
3487 | goto done; | |
1da177e4 LT |
3488 | return 0; |
3489 | ||
3490 | done: | |
3491 | if (dev) | |
fae3c158 | 3492 | net2280_remove(pdev); |
1da177e4 LT |
3493 | return retval; |
3494 | } | |
3495 | ||
2d61bde7 AS |
3496 | /* make sure the board is quiescent; otherwise it will continue |
3497 | * generating IRQs across the upcoming reboot. | |
3498 | */ | |
3499 | ||
fae3c158 | 3500 | static void net2280_shutdown(struct pci_dev *pdev) |
2d61bde7 | 3501 | { |
fae3c158 | 3502 | struct net2280 *dev = pci_get_drvdata(pdev); |
2d61bde7 AS |
3503 | |
3504 | /* disable IRQs */ | |
fae3c158 RRD |
3505 | writel(0, &dev->regs->pciirqenb0); |
3506 | writel(0, &dev->regs->pciirqenb1); | |
2d61bde7 AS |
3507 | |
3508 | /* disable the pullup so the host will think we're gone */ | |
fae3c158 | 3509 | writel(0, &dev->usb->usbctl); |
2f076077 | 3510 | |
2d61bde7 AS |
3511 | } |
3512 | ||
1da177e4 LT |
3513 | |
3514 | /*-------------------------------------------------------------------------*/ | |
3515 | ||
fae3c158 | 3516 | static const struct pci_device_id pci_ids[] = { { |
901b3d75 DB |
3517 | .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), |
3518 | .class_mask = ~0, | |
c2db8a8a | 3519 | .vendor = PCI_VENDOR_ID_PLX_LEGACY, |
1da177e4 LT |
3520 | .device = 0x2280, |
3521 | .subvendor = PCI_ANY_ID, | |
3522 | .subdevice = PCI_ANY_ID, | |
2eeb0016 | 3523 | .driver_data = PLX_LEGACY | PLX_2280, |
ae8e530a | 3524 | }, { |
901b3d75 DB |
3525 | .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), |
3526 | .class_mask = ~0, | |
c2db8a8a | 3527 | .vendor = PCI_VENDOR_ID_PLX_LEGACY, |
950ee4c8 GL |
3528 | .device = 0x2282, |
3529 | .subvendor = PCI_ANY_ID, | |
3530 | .subdevice = PCI_ANY_ID, | |
2eeb0016 | 3531 | .driver_data = PLX_LEGACY, |
ae8e530a | 3532 | }, |
adc82f77 | 3533 | { |
ae8e530a RRD |
3534 | .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), |
3535 | .class_mask = ~0, | |
3536 | .vendor = PCI_VENDOR_ID_PLX, | |
3537 | .device = 0x3380, | |
3538 | .subvendor = PCI_ANY_ID, | |
3539 | .subdevice = PCI_ANY_ID, | |
2eeb0016 | 3540 | .driver_data = PLX_SUPERSPEED, |
adc82f77 RRD |
3541 | }, |
3542 | { | |
ae8e530a RRD |
3543 | .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), |
3544 | .class_mask = ~0, | |
3545 | .vendor = PCI_VENDOR_ID_PLX, | |
3546 | .device = 0x3382, | |
3547 | .subvendor = PCI_ANY_ID, | |
3548 | .subdevice = PCI_ANY_ID, | |
2eeb0016 | 3549 | .driver_data = PLX_SUPERSPEED, |
adc82f77 RRD |
3550 | }, |
3551 | { /* end: all zeroes */ } | |
1da177e4 | 3552 | }; |
fae3c158 | 3553 | MODULE_DEVICE_TABLE(pci, pci_ids); |
1da177e4 LT |
3554 | |
3555 | /* pci driver glue; this is a "new style" PCI driver module */ | |
3556 | static struct pci_driver net2280_pci_driver = { | |
3557 | .name = (char *) driver_name, | |
3558 | .id_table = pci_ids, | |
3559 | ||
3560 | .probe = net2280_probe, | |
3561 | .remove = net2280_remove, | |
2d61bde7 | 3562 | .shutdown = net2280_shutdown, |
1da177e4 LT |
3563 | |
3564 | /* FIXME add power management support */ | |
3565 | }; | |
3566 | ||
9a028e46 RRD |
3567 | module_pci_driver(net2280_pci_driver); |
3568 | ||
fae3c158 RRD |
3569 | MODULE_DESCRIPTION(DRIVER_DESC); |
3570 | MODULE_AUTHOR("David Brownell"); | |
3571 | MODULE_LICENSE("GPL"); |