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550a7375 FB |
1 | /* |
2 | * MUSB OTG driver core code | |
3 | * | |
4 | * Copyright 2005 Mentor Graphics Corporation | |
5 | * Copyright (C) 2005-2006 by Texas Instruments | |
6 | * Copyright (C) 2006-2007 Nokia Corporation | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * version 2 as published by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
20 | * 02110-1301 USA | |
21 | * | |
22 | * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED | |
23 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
24 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN | |
25 | * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, | |
26 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
27 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF | |
28 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON | |
29 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
30 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
31 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
35 | /* | |
36 | * Inventra (Multipoint) Dual-Role Controller Driver for Linux. | |
37 | * | |
38 | * This consists of a Host Controller Driver (HCD) and a peripheral | |
39 | * controller driver implementing the "Gadget" API; OTG support is | |
40 | * in the works. These are normal Linux-USB controller drivers which | |
41 | * use IRQs and have no dedicated thread. | |
42 | * | |
43 | * This version of the driver has only been used with products from | |
44 | * Texas Instruments. Those products integrate the Inventra logic | |
45 | * with other DMA, IRQ, and bus modules, as well as other logic that | |
46 | * needs to be reflected in this driver. | |
47 | * | |
48 | * | |
49 | * NOTE: the original Mentor code here was pretty much a collection | |
50 | * of mechanisms that don't seem to have been fully integrated/working | |
51 | * for *any* Linux kernel version. This version aims at Linux 2.6.now, | |
52 | * Key open issues include: | |
53 | * | |
54 | * - Lack of host-side transaction scheduling, for all transfer types. | |
55 | * The hardware doesn't do it; instead, software must. | |
56 | * | |
57 | * This is not an issue for OTG devices that don't support external | |
58 | * hubs, but for more "normal" USB hosts it's a user issue that the | |
59 | * "multipoint" support doesn't scale in the expected ways. That | |
60 | * includes DaVinci EVM in a common non-OTG mode. | |
61 | * | |
62 | * * Control and bulk use dedicated endpoints, and there's as | |
63 | * yet no mechanism to either (a) reclaim the hardware when | |
64 | * peripherals are NAKing, which gets complicated with bulk | |
65 | * endpoints, or (b) use more than a single bulk endpoint in | |
66 | * each direction. | |
67 | * | |
68 | * RESULT: one device may be perceived as blocking another one. | |
69 | * | |
70 | * * Interrupt and isochronous will dynamically allocate endpoint | |
71 | * hardware, but (a) there's no record keeping for bandwidth; | |
72 | * (b) in the common case that few endpoints are available, there | |
73 | * is no mechanism to reuse endpoints to talk to multiple devices. | |
74 | * | |
75 | * RESULT: At one extreme, bandwidth can be overcommitted in | |
76 | * some hardware configurations, no faults will be reported. | |
77 | * At the other extreme, the bandwidth capabilities which do | |
78 | * exist tend to be severely undercommitted. You can't yet hook | |
79 | * up both a keyboard and a mouse to an external USB hub. | |
80 | */ | |
81 | ||
82 | /* | |
83 | * This gets many kinds of configuration information: | |
84 | * - Kconfig for everything user-configurable | |
550a7375 FB |
85 | * - platform_device for addressing, irq, and platform_data |
86 | * - platform_data is mostly for board-specific informarion | |
c767c1c6 | 87 | * (plus recentrly, SOC or family details) |
550a7375 FB |
88 | * |
89 | * Most of the conditional compilation will (someday) vanish. | |
90 | */ | |
91 | ||
92 | #include <linux/module.h> | |
93 | #include <linux/kernel.h> | |
94 | #include <linux/sched.h> | |
95 | #include <linux/slab.h> | |
96 | #include <linux/init.h> | |
97 | #include <linux/list.h> | |
98 | #include <linux/kobject.h> | |
99 | #include <linux/platform_device.h> | |
100 | #include <linux/io.h> | |
101 | ||
102 | #ifdef CONFIG_ARM | |
0590d587 FB |
103 | #include <mach/hardware.h> |
104 | #include <mach/memory.h> | |
550a7375 FB |
105 | #include <asm/mach-types.h> |
106 | #endif | |
107 | ||
108 | #include "musb_core.h" | |
109 | ||
110 | ||
111 | #ifdef CONFIG_ARCH_DAVINCI | |
112 | #include "davinci.h" | |
113 | #endif | |
114 | ||
f7f9d63e | 115 | #define TA_WAIT_BCON(m) max_t(int, (m)->a_wait_bcon, OTG_TIME_A_WAIT_BCON) |
550a7375 FB |
116 | |
117 | ||
b60c72ab | 118 | unsigned musb_debug; |
34f32c97 | 119 | module_param_named(debug, musb_debug, uint, S_IRUGO | S_IWUSR); |
e8164f64 | 120 | MODULE_PARM_DESC(debug, "Debug message level. Default = 0"); |
550a7375 FB |
121 | |
122 | #define DRIVER_AUTHOR "Mentor Graphics, Texas Instruments, Nokia" | |
123 | #define DRIVER_DESC "Inventra Dual-Role USB Controller Driver" | |
124 | ||
e8164f64 | 125 | #define MUSB_VERSION "6.0" |
550a7375 FB |
126 | |
127 | #define DRIVER_INFO DRIVER_DESC ", v" MUSB_VERSION | |
128 | ||
129 | #define MUSB_DRIVER_NAME "musb_hdrc" | |
130 | const char musb_driver_name[] = MUSB_DRIVER_NAME; | |
131 | ||
132 | MODULE_DESCRIPTION(DRIVER_INFO); | |
133 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
134 | MODULE_LICENSE("GPL"); | |
135 | MODULE_ALIAS("platform:" MUSB_DRIVER_NAME); | |
136 | ||
137 | ||
138 | /*-------------------------------------------------------------------------*/ | |
139 | ||
140 | static inline struct musb *dev_to_musb(struct device *dev) | |
141 | { | |
142 | #ifdef CONFIG_USB_MUSB_HDRC_HCD | |
143 | /* usbcore insists dev->driver_data is a "struct hcd *" */ | |
144 | return hcd_to_musb(dev_get_drvdata(dev)); | |
145 | #else | |
146 | return dev_get_drvdata(dev); | |
147 | #endif | |
148 | } | |
149 | ||
150 | /*-------------------------------------------------------------------------*/ | |
151 | ||
c6cf8b00 BW |
152 | #if !defined(CONFIG_USB_TUSB6010) && !defined(CONFIG_BLACKFIN) |
153 | ||
550a7375 FB |
154 | /* |
155 | * Load an endpoint's FIFO | |
156 | */ | |
157 | void musb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *src) | |
158 | { | |
159 | void __iomem *fifo = hw_ep->fifo; | |
160 | ||
161 | prefetch((u8 *)src); | |
162 | ||
163 | DBG(4, "%cX ep%d fifo %p count %d buf %p\n", | |
164 | 'T', hw_ep->epnum, fifo, len, src); | |
165 | ||
166 | /* we can't assume unaligned reads work */ | |
167 | if (likely((0x01 & (unsigned long) src) == 0)) { | |
168 | u16 index = 0; | |
169 | ||
170 | /* best case is 32bit-aligned source address */ | |
171 | if ((0x02 & (unsigned long) src) == 0) { | |
172 | if (len >= 4) { | |
173 | writesl(fifo, src + index, len >> 2); | |
174 | index += len & ~0x03; | |
175 | } | |
176 | if (len & 0x02) { | |
177 | musb_writew(fifo, 0, *(u16 *)&src[index]); | |
178 | index += 2; | |
179 | } | |
180 | } else { | |
181 | if (len >= 2) { | |
182 | writesw(fifo, src + index, len >> 1); | |
183 | index += len & ~0x01; | |
184 | } | |
185 | } | |
186 | if (len & 0x01) | |
187 | musb_writeb(fifo, 0, src[index]); | |
188 | } else { | |
189 | /* byte aligned */ | |
190 | writesb(fifo, src, len); | |
191 | } | |
192 | } | |
193 | ||
194 | /* | |
195 | * Unload an endpoint's FIFO | |
196 | */ | |
197 | void musb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *dst) | |
198 | { | |
199 | void __iomem *fifo = hw_ep->fifo; | |
200 | ||
201 | DBG(4, "%cX ep%d fifo %p count %d buf %p\n", | |
202 | 'R', hw_ep->epnum, fifo, len, dst); | |
203 | ||
204 | /* we can't assume unaligned writes work */ | |
205 | if (likely((0x01 & (unsigned long) dst) == 0)) { | |
206 | u16 index = 0; | |
207 | ||
208 | /* best case is 32bit-aligned destination address */ | |
209 | if ((0x02 & (unsigned long) dst) == 0) { | |
210 | if (len >= 4) { | |
211 | readsl(fifo, dst, len >> 2); | |
212 | index = len & ~0x03; | |
213 | } | |
214 | if (len & 0x02) { | |
215 | *(u16 *)&dst[index] = musb_readw(fifo, 0); | |
216 | index += 2; | |
217 | } | |
218 | } else { | |
219 | if (len >= 2) { | |
220 | readsw(fifo, dst, len >> 1); | |
221 | index = len & ~0x01; | |
222 | } | |
223 | } | |
224 | if (len & 0x01) | |
225 | dst[index] = musb_readb(fifo, 0); | |
226 | } else { | |
227 | /* byte aligned */ | |
228 | readsb(fifo, dst, len); | |
229 | } | |
230 | } | |
231 | ||
232 | #endif /* normal PIO */ | |
233 | ||
234 | ||
235 | /*-------------------------------------------------------------------------*/ | |
236 | ||
237 | /* for high speed test mode; see USB 2.0 spec 7.1.20 */ | |
238 | static const u8 musb_test_packet[53] = { | |
239 | /* implicit SYNC then DATA0 to start */ | |
240 | ||
241 | /* JKJKJKJK x9 */ | |
242 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
243 | /* JJKKJJKK x8 */ | |
244 | 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, | |
245 | /* JJJJKKKK x8 */ | |
246 | 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, | |
247 | /* JJJJJJJKKKKKKK x8 */ | |
248 | 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, | |
249 | /* JJJJJJJK x8 */ | |
250 | 0x7f, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd, | |
251 | /* JKKKKKKK x10, JK */ | |
252 | 0xfc, 0x7e, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd, 0x7e | |
253 | ||
254 | /* implicit CRC16 then EOP to end */ | |
255 | }; | |
256 | ||
257 | void musb_load_testpacket(struct musb *musb) | |
258 | { | |
259 | void __iomem *regs = musb->endpoints[0].regs; | |
260 | ||
261 | musb_ep_select(musb->mregs, 0); | |
262 | musb_write_fifo(musb->control_ep, | |
263 | sizeof(musb_test_packet), musb_test_packet); | |
264 | musb_writew(regs, MUSB_CSR0, MUSB_CSR0_TXPKTRDY); | |
265 | } | |
266 | ||
267 | /*-------------------------------------------------------------------------*/ | |
268 | ||
269 | const char *otg_state_string(struct musb *musb) | |
270 | { | |
84e250ff | 271 | switch (musb->xceiv->state) { |
550a7375 FB |
272 | case OTG_STATE_A_IDLE: return "a_idle"; |
273 | case OTG_STATE_A_WAIT_VRISE: return "a_wait_vrise"; | |
274 | case OTG_STATE_A_WAIT_BCON: return "a_wait_bcon"; | |
275 | case OTG_STATE_A_HOST: return "a_host"; | |
276 | case OTG_STATE_A_SUSPEND: return "a_suspend"; | |
277 | case OTG_STATE_A_PERIPHERAL: return "a_peripheral"; | |
278 | case OTG_STATE_A_WAIT_VFALL: return "a_wait_vfall"; | |
279 | case OTG_STATE_A_VBUS_ERR: return "a_vbus_err"; | |
280 | case OTG_STATE_B_IDLE: return "b_idle"; | |
281 | case OTG_STATE_B_SRP_INIT: return "b_srp_init"; | |
282 | case OTG_STATE_B_PERIPHERAL: return "b_peripheral"; | |
283 | case OTG_STATE_B_WAIT_ACON: return "b_wait_acon"; | |
284 | case OTG_STATE_B_HOST: return "b_host"; | |
285 | default: return "UNDEFINED"; | |
286 | } | |
287 | } | |
288 | ||
289 | #ifdef CONFIG_USB_MUSB_OTG | |
290 | ||
550a7375 FB |
291 | /* |
292 | * Handles OTG hnp timeouts, such as b_ase0_brst | |
293 | */ | |
294 | void musb_otg_timer_func(unsigned long data) | |
295 | { | |
296 | struct musb *musb = (struct musb *)data; | |
297 | unsigned long flags; | |
298 | ||
299 | spin_lock_irqsave(&musb->lock, flags); | |
84e250ff | 300 | switch (musb->xceiv->state) { |
550a7375 FB |
301 | case OTG_STATE_B_WAIT_ACON: |
302 | DBG(1, "HNP: b_wait_acon timeout; back to b_peripheral\n"); | |
303 | musb_g_disconnect(musb); | |
84e250ff | 304 | musb->xceiv->state = OTG_STATE_B_PERIPHERAL; |
550a7375 FB |
305 | musb->is_active = 0; |
306 | break; | |
ab983f2a | 307 | case OTG_STATE_A_SUSPEND: |
550a7375 | 308 | case OTG_STATE_A_WAIT_BCON: |
ab983f2a DB |
309 | DBG(1, "HNP: %s timeout\n", otg_state_string(musb)); |
310 | musb_set_vbus(musb, 0); | |
311 | musb->xceiv->state = OTG_STATE_A_WAIT_VFALL; | |
550a7375 FB |
312 | break; |
313 | default: | |
314 | DBG(1, "HNP: Unhandled mode %s\n", otg_state_string(musb)); | |
315 | } | |
316 | musb->ignore_disconnect = 0; | |
317 | spin_unlock_irqrestore(&musb->lock, flags); | |
318 | } | |
319 | ||
550a7375 | 320 | /* |
f7f9d63e | 321 | * Stops the HNP transition. Caller must take care of locking. |
550a7375 FB |
322 | */ |
323 | void musb_hnp_stop(struct musb *musb) | |
324 | { | |
325 | struct usb_hcd *hcd = musb_to_hcd(musb); | |
326 | void __iomem *mbase = musb->mregs; | |
327 | u8 reg; | |
328 | ||
ab983f2a DB |
329 | DBG(1, "HNP: stop from %s\n", otg_state_string(musb)); |
330 | ||
84e250ff | 331 | switch (musb->xceiv->state) { |
550a7375 | 332 | case OTG_STATE_A_PERIPHERAL: |
550a7375 | 333 | musb_g_disconnect(musb); |
ab983f2a | 334 | DBG(1, "HNP: back to %s\n", otg_state_string(musb)); |
550a7375 FB |
335 | break; |
336 | case OTG_STATE_B_HOST: | |
337 | DBG(1, "HNP: Disabling HR\n"); | |
338 | hcd->self.is_b_host = 0; | |
84e250ff | 339 | musb->xceiv->state = OTG_STATE_B_PERIPHERAL; |
550a7375 FB |
340 | MUSB_DEV_MODE(musb); |
341 | reg = musb_readb(mbase, MUSB_POWER); | |
342 | reg |= MUSB_POWER_SUSPENDM; | |
343 | musb_writeb(mbase, MUSB_POWER, reg); | |
344 | /* REVISIT: Start SESSION_REQUEST here? */ | |
345 | break; | |
346 | default: | |
347 | DBG(1, "HNP: Stopping in unknown state %s\n", | |
348 | otg_state_string(musb)); | |
349 | } | |
350 | ||
351 | /* | |
352 | * When returning to A state after HNP, avoid hub_port_rebounce(), | |
353 | * which cause occasional OPT A "Did not receive reset after connect" | |
354 | * errors. | |
355 | */ | |
356 | musb->port1_status &= | |
357 | ~(1 << USB_PORT_FEAT_C_CONNECTION); | |
358 | } | |
359 | ||
360 | #endif | |
361 | ||
362 | /* | |
363 | * Interrupt Service Routine to record USB "global" interrupts. | |
364 | * Since these do not happen often and signify things of | |
365 | * paramount importance, it seems OK to check them individually; | |
366 | * the order of the tests is specified in the manual | |
367 | * | |
368 | * @param musb instance pointer | |
369 | * @param int_usb register contents | |
370 | * @param devctl | |
371 | * @param power | |
372 | */ | |
373 | ||
374 | #define STAGE0_MASK (MUSB_INTR_RESUME | MUSB_INTR_SESSREQ \ | |
375 | | MUSB_INTR_VBUSERROR | MUSB_INTR_CONNECT \ | |
376 | | MUSB_INTR_RESET) | |
377 | ||
378 | static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb, | |
379 | u8 devctl, u8 power) | |
380 | { | |
381 | irqreturn_t handled = IRQ_NONE; | |
382 | void __iomem *mbase = musb->mregs; | |
383 | ||
384 | DBG(3, "<== Power=%02x, DevCtl=%02x, int_usb=0x%x\n", power, devctl, | |
385 | int_usb); | |
386 | ||
387 | /* in host mode, the peripheral may issue remote wakeup. | |
388 | * in peripheral mode, the host may resume the link. | |
389 | * spurious RESUME irqs happen too, paired with SUSPEND. | |
390 | */ | |
391 | if (int_usb & MUSB_INTR_RESUME) { | |
392 | handled = IRQ_HANDLED; | |
393 | DBG(3, "RESUME (%s)\n", otg_state_string(musb)); | |
394 | ||
395 | if (devctl & MUSB_DEVCTL_HM) { | |
396 | #ifdef CONFIG_USB_MUSB_HDRC_HCD | |
84e250ff | 397 | switch (musb->xceiv->state) { |
550a7375 FB |
398 | case OTG_STATE_A_SUSPEND: |
399 | /* remote wakeup? later, GetPortStatus | |
400 | * will stop RESUME signaling | |
401 | */ | |
402 | ||
403 | if (power & MUSB_POWER_SUSPENDM) { | |
404 | /* spurious */ | |
405 | musb->int_usb &= ~MUSB_INTR_SUSPEND; | |
406 | DBG(2, "Spurious SUSPENDM\n"); | |
407 | break; | |
408 | } | |
409 | ||
410 | power &= ~MUSB_POWER_SUSPENDM; | |
411 | musb_writeb(mbase, MUSB_POWER, | |
412 | power | MUSB_POWER_RESUME); | |
413 | ||
414 | musb->port1_status |= | |
415 | (USB_PORT_STAT_C_SUSPEND << 16) | |
416 | | MUSB_PORT_STAT_RESUME; | |
417 | musb->rh_timer = jiffies | |
418 | + msecs_to_jiffies(20); | |
419 | ||
84e250ff | 420 | musb->xceiv->state = OTG_STATE_A_HOST; |
550a7375 FB |
421 | musb->is_active = 1; |
422 | usb_hcd_resume_root_hub(musb_to_hcd(musb)); | |
423 | break; | |
424 | case OTG_STATE_B_WAIT_ACON: | |
84e250ff | 425 | musb->xceiv->state = OTG_STATE_B_PERIPHERAL; |
550a7375 FB |
426 | musb->is_active = 1; |
427 | MUSB_DEV_MODE(musb); | |
428 | break; | |
429 | default: | |
430 | WARNING("bogus %s RESUME (%s)\n", | |
431 | "host", | |
432 | otg_state_string(musb)); | |
433 | } | |
434 | #endif | |
435 | } else { | |
84e250ff | 436 | switch (musb->xceiv->state) { |
550a7375 FB |
437 | #ifdef CONFIG_USB_MUSB_HDRC_HCD |
438 | case OTG_STATE_A_SUSPEND: | |
439 | /* possibly DISCONNECT is upcoming */ | |
84e250ff | 440 | musb->xceiv->state = OTG_STATE_A_HOST; |
550a7375 FB |
441 | usb_hcd_resume_root_hub(musb_to_hcd(musb)); |
442 | break; | |
443 | #endif | |
444 | #ifdef CONFIG_USB_GADGET_MUSB_HDRC | |
445 | case OTG_STATE_B_WAIT_ACON: | |
446 | case OTG_STATE_B_PERIPHERAL: | |
447 | /* disconnect while suspended? we may | |
448 | * not get a disconnect irq... | |
449 | */ | |
450 | if ((devctl & MUSB_DEVCTL_VBUS) | |
451 | != (3 << MUSB_DEVCTL_VBUS_SHIFT) | |
452 | ) { | |
453 | musb->int_usb |= MUSB_INTR_DISCONNECT; | |
454 | musb->int_usb &= ~MUSB_INTR_SUSPEND; | |
455 | break; | |
456 | } | |
457 | musb_g_resume(musb); | |
458 | break; | |
459 | case OTG_STATE_B_IDLE: | |
460 | musb->int_usb &= ~MUSB_INTR_SUSPEND; | |
461 | break; | |
462 | #endif | |
463 | default: | |
464 | WARNING("bogus %s RESUME (%s)\n", | |
465 | "peripheral", | |
466 | otg_state_string(musb)); | |
467 | } | |
468 | } | |
469 | } | |
470 | ||
471 | #ifdef CONFIG_USB_MUSB_HDRC_HCD | |
472 | /* see manual for the order of the tests */ | |
473 | if (int_usb & MUSB_INTR_SESSREQ) { | |
474 | DBG(1, "SESSION_REQUEST (%s)\n", otg_state_string(musb)); | |
475 | ||
476 | /* IRQ arrives from ID pin sense or (later, if VBUS power | |
477 | * is removed) SRP. responses are time critical: | |
478 | * - turn on VBUS (with silicon-specific mechanism) | |
479 | * - go through A_WAIT_VRISE | |
480 | * - ... to A_WAIT_BCON. | |
481 | * a_wait_vrise_tmout triggers VBUS_ERROR transitions | |
482 | */ | |
483 | musb_writeb(mbase, MUSB_DEVCTL, MUSB_DEVCTL_SESSION); | |
484 | musb->ep0_stage = MUSB_EP0_START; | |
84e250ff | 485 | musb->xceiv->state = OTG_STATE_A_IDLE; |
550a7375 FB |
486 | MUSB_HST_MODE(musb); |
487 | musb_set_vbus(musb, 1); | |
488 | ||
489 | handled = IRQ_HANDLED; | |
490 | } | |
491 | ||
492 | if (int_usb & MUSB_INTR_VBUSERROR) { | |
493 | int ignore = 0; | |
494 | ||
495 | /* During connection as an A-Device, we may see a short | |
496 | * current spikes causing voltage drop, because of cable | |
497 | * and peripheral capacitance combined with vbus draw. | |
498 | * (So: less common with truly self-powered devices, where | |
499 | * vbus doesn't act like a power supply.) | |
500 | * | |
501 | * Such spikes are short; usually less than ~500 usec, max | |
502 | * of ~2 msec. That is, they're not sustained overcurrent | |
503 | * errors, though they're reported using VBUSERROR irqs. | |
504 | * | |
505 | * Workarounds: (a) hardware: use self powered devices. | |
506 | * (b) software: ignore non-repeated VBUS errors. | |
507 | * | |
508 | * REVISIT: do delays from lots of DEBUG_KERNEL checks | |
509 | * make trouble here, keeping VBUS < 4.4V ? | |
510 | */ | |
84e250ff | 511 | switch (musb->xceiv->state) { |
550a7375 FB |
512 | case OTG_STATE_A_HOST: |
513 | /* recovery is dicey once we've gotten past the | |
514 | * initial stages of enumeration, but if VBUS | |
515 | * stayed ok at the other end of the link, and | |
516 | * another reset is due (at least for high speed, | |
517 | * to redo the chirp etc), it might work OK... | |
518 | */ | |
519 | case OTG_STATE_A_WAIT_BCON: | |
520 | case OTG_STATE_A_WAIT_VRISE: | |
521 | if (musb->vbuserr_retry) { | |
522 | musb->vbuserr_retry--; | |
523 | ignore = 1; | |
524 | devctl |= MUSB_DEVCTL_SESSION; | |
525 | musb_writeb(mbase, MUSB_DEVCTL, devctl); | |
526 | } else { | |
527 | musb->port1_status |= | |
528 | (1 << USB_PORT_FEAT_OVER_CURRENT) | |
529 | | (1 << USB_PORT_FEAT_C_OVER_CURRENT); | |
530 | } | |
531 | break; | |
532 | default: | |
533 | break; | |
534 | } | |
535 | ||
536 | DBG(1, "VBUS_ERROR in %s (%02x, %s), retry #%d, port1 %08x\n", | |
537 | otg_state_string(musb), | |
538 | devctl, | |
539 | ({ char *s; | |
540 | switch (devctl & MUSB_DEVCTL_VBUS) { | |
541 | case 0 << MUSB_DEVCTL_VBUS_SHIFT: | |
542 | s = "<SessEnd"; break; | |
543 | case 1 << MUSB_DEVCTL_VBUS_SHIFT: | |
544 | s = "<AValid"; break; | |
545 | case 2 << MUSB_DEVCTL_VBUS_SHIFT: | |
546 | s = "<VBusValid"; break; | |
547 | /* case 3 << MUSB_DEVCTL_VBUS_SHIFT: */ | |
548 | default: | |
549 | s = "VALID"; break; | |
550 | }; s; }), | |
551 | VBUSERR_RETRY_COUNT - musb->vbuserr_retry, | |
552 | musb->port1_status); | |
553 | ||
554 | /* go through A_WAIT_VFALL then start a new session */ | |
555 | if (!ignore) | |
556 | musb_set_vbus(musb, 0); | |
557 | handled = IRQ_HANDLED; | |
558 | } | |
559 | ||
560 | if (int_usb & MUSB_INTR_CONNECT) { | |
561 | struct usb_hcd *hcd = musb_to_hcd(musb); | |
562 | ||
563 | handled = IRQ_HANDLED; | |
564 | musb->is_active = 1; | |
565 | set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); | |
566 | ||
567 | musb->ep0_stage = MUSB_EP0_START; | |
568 | ||
569 | #ifdef CONFIG_USB_MUSB_OTG | |
570 | /* flush endpoints when transitioning from Device Mode */ | |
571 | if (is_peripheral_active(musb)) { | |
572 | /* REVISIT HNP; just force disconnect */ | |
573 | } | |
574 | musb_writew(mbase, MUSB_INTRTXE, musb->epmask); | |
575 | musb_writew(mbase, MUSB_INTRRXE, musb->epmask & 0xfffe); | |
576 | musb_writeb(mbase, MUSB_INTRUSBE, 0xf7); | |
577 | #endif | |
578 | musb->port1_status &= ~(USB_PORT_STAT_LOW_SPEED | |
579 | |USB_PORT_STAT_HIGH_SPEED | |
580 | |USB_PORT_STAT_ENABLE | |
581 | ); | |
582 | musb->port1_status |= USB_PORT_STAT_CONNECTION | |
583 | |(USB_PORT_STAT_C_CONNECTION << 16); | |
584 | ||
585 | /* high vs full speed is just a guess until after reset */ | |
586 | if (devctl & MUSB_DEVCTL_LSDEV) | |
587 | musb->port1_status |= USB_PORT_STAT_LOW_SPEED; | |
588 | ||
550a7375 | 589 | /* indicate new connection to OTG machine */ |
84e250ff | 590 | switch (musb->xceiv->state) { |
550a7375 FB |
591 | case OTG_STATE_B_PERIPHERAL: |
592 | if (int_usb & MUSB_INTR_SUSPEND) { | |
593 | DBG(1, "HNP: SUSPEND+CONNECT, now b_host\n"); | |
550a7375 | 594 | int_usb &= ~MUSB_INTR_SUSPEND; |
1de00dae | 595 | goto b_host; |
550a7375 FB |
596 | } else |
597 | DBG(1, "CONNECT as b_peripheral???\n"); | |
598 | break; | |
599 | case OTG_STATE_B_WAIT_ACON: | |
1de00dae DB |
600 | DBG(1, "HNP: CONNECT, now b_host\n"); |
601 | b_host: | |
84e250ff | 602 | musb->xceiv->state = OTG_STATE_B_HOST; |
550a7375 | 603 | hcd->self.is_b_host = 1; |
1de00dae DB |
604 | musb->ignore_disconnect = 0; |
605 | del_timer(&musb->otg_timer); | |
550a7375 FB |
606 | break; |
607 | default: | |
608 | if ((devctl & MUSB_DEVCTL_VBUS) | |
609 | == (3 << MUSB_DEVCTL_VBUS_SHIFT)) { | |
84e250ff | 610 | musb->xceiv->state = OTG_STATE_A_HOST; |
550a7375 FB |
611 | hcd->self.is_b_host = 0; |
612 | } | |
613 | break; | |
614 | } | |
1de00dae DB |
615 | |
616 | /* poke the root hub */ | |
617 | MUSB_HST_MODE(musb); | |
618 | if (hcd->status_urb) | |
619 | usb_hcd_poll_rh_status(hcd); | |
620 | else | |
621 | usb_hcd_resume_root_hub(hcd); | |
622 | ||
550a7375 FB |
623 | DBG(1, "CONNECT (%s) devctl %02x\n", |
624 | otg_state_string(musb), devctl); | |
625 | } | |
626 | #endif /* CONFIG_USB_MUSB_HDRC_HCD */ | |
627 | ||
628 | /* mentor saves a bit: bus reset and babble share the same irq. | |
629 | * only host sees babble; only peripheral sees bus reset. | |
630 | */ | |
631 | if (int_usb & MUSB_INTR_RESET) { | |
632 | if (is_host_capable() && (devctl & MUSB_DEVCTL_HM) != 0) { | |
633 | /* | |
634 | * Looks like non-HS BABBLE can be ignored, but | |
635 | * HS BABBLE is an error condition. For HS the solution | |
636 | * is to avoid babble in the first place and fix what | |
637 | * caused BABBLE. When HS BABBLE happens we can only | |
638 | * stop the session. | |
639 | */ | |
640 | if (devctl & (MUSB_DEVCTL_FSDEV | MUSB_DEVCTL_LSDEV)) | |
641 | DBG(1, "BABBLE devctl: %02x\n", devctl); | |
642 | else { | |
643 | ERR("Stopping host session -- babble\n"); | |
644 | musb_writeb(mbase, MUSB_DEVCTL, 0); | |
645 | } | |
646 | } else if (is_peripheral_capable()) { | |
647 | DBG(1, "BUS RESET as %s\n", otg_state_string(musb)); | |
84e250ff | 648 | switch (musb->xceiv->state) { |
550a7375 FB |
649 | #ifdef CONFIG_USB_OTG |
650 | case OTG_STATE_A_SUSPEND: | |
651 | /* We need to ignore disconnect on suspend | |
652 | * otherwise tusb 2.0 won't reconnect after a | |
653 | * power cycle, which breaks otg compliance. | |
654 | */ | |
655 | musb->ignore_disconnect = 1; | |
656 | musb_g_reset(musb); | |
657 | /* FALLTHROUGH */ | |
658 | case OTG_STATE_A_WAIT_BCON: /* OPT TD.4.7-900ms */ | |
f7f9d63e DB |
659 | /* never use invalid T(a_wait_bcon) */ |
660 | DBG(1, "HNP: in %s, %d msec timeout\n", | |
661 | otg_state_string(musb), | |
662 | TA_WAIT_BCON(musb)); | |
663 | mod_timer(&musb->otg_timer, jiffies | |
664 | + msecs_to_jiffies(TA_WAIT_BCON(musb))); | |
550a7375 FB |
665 | break; |
666 | case OTG_STATE_A_PERIPHERAL: | |
1de00dae DB |
667 | musb->ignore_disconnect = 0; |
668 | del_timer(&musb->otg_timer); | |
669 | musb_g_reset(musb); | |
550a7375 FB |
670 | break; |
671 | case OTG_STATE_B_WAIT_ACON: | |
672 | DBG(1, "HNP: RESET (%s), to b_peripheral\n", | |
673 | otg_state_string(musb)); | |
84e250ff | 674 | musb->xceiv->state = OTG_STATE_B_PERIPHERAL; |
550a7375 FB |
675 | musb_g_reset(musb); |
676 | break; | |
677 | #endif | |
678 | case OTG_STATE_B_IDLE: | |
84e250ff | 679 | musb->xceiv->state = OTG_STATE_B_PERIPHERAL; |
550a7375 FB |
680 | /* FALLTHROUGH */ |
681 | case OTG_STATE_B_PERIPHERAL: | |
682 | musb_g_reset(musb); | |
683 | break; | |
684 | default: | |
685 | DBG(1, "Unhandled BUS RESET as %s\n", | |
686 | otg_state_string(musb)); | |
687 | } | |
688 | } | |
689 | ||
690 | handled = IRQ_HANDLED; | |
691 | } | |
692 | schedule_work(&musb->irq_work); | |
693 | ||
694 | return handled; | |
695 | } | |
696 | ||
697 | /* | |
698 | * Interrupt Service Routine to record USB "global" interrupts. | |
699 | * Since these do not happen often and signify things of | |
700 | * paramount importance, it seems OK to check them individually; | |
701 | * the order of the tests is specified in the manual | |
702 | * | |
703 | * @param musb instance pointer | |
704 | * @param int_usb register contents | |
705 | * @param devctl | |
706 | * @param power | |
707 | */ | |
708 | static irqreturn_t musb_stage2_irq(struct musb *musb, u8 int_usb, | |
709 | u8 devctl, u8 power) | |
710 | { | |
711 | irqreturn_t handled = IRQ_NONE; | |
712 | ||
713 | #if 0 | |
714 | /* REVISIT ... this would be for multiplexing periodic endpoints, or | |
715 | * supporting transfer phasing to prevent exceeding ISO bandwidth | |
716 | * limits of a given frame or microframe. | |
717 | * | |
718 | * It's not needed for peripheral side, which dedicates endpoints; | |
719 | * though it _might_ use SOF irqs for other purposes. | |
720 | * | |
721 | * And it's not currently needed for host side, which also dedicates | |
722 | * endpoints, relies on TX/RX interval registers, and isn't claimed | |
723 | * to support ISO transfers yet. | |
724 | */ | |
725 | if (int_usb & MUSB_INTR_SOF) { | |
726 | void __iomem *mbase = musb->mregs; | |
727 | struct musb_hw_ep *ep; | |
728 | u8 epnum; | |
729 | u16 frame; | |
730 | ||
731 | DBG(6, "START_OF_FRAME\n"); | |
732 | handled = IRQ_HANDLED; | |
733 | ||
734 | /* start any periodic Tx transfers waiting for current frame */ | |
735 | frame = musb_readw(mbase, MUSB_FRAME); | |
736 | ep = musb->endpoints; | |
737 | for (epnum = 1; (epnum < musb->nr_endpoints) | |
738 | && (musb->epmask >= (1 << epnum)); | |
739 | epnum++, ep++) { | |
740 | /* | |
741 | * FIXME handle framecounter wraps (12 bits) | |
742 | * eliminate duplicated StartUrb logic | |
743 | */ | |
744 | if (ep->dwWaitFrame >= frame) { | |
745 | ep->dwWaitFrame = 0; | |
746 | pr_debug("SOF --> periodic TX%s on %d\n", | |
747 | ep->tx_channel ? " DMA" : "", | |
748 | epnum); | |
749 | if (!ep->tx_channel) | |
750 | musb_h_tx_start(musb, epnum); | |
751 | else | |
752 | cppi_hostdma_start(musb, epnum); | |
753 | } | |
754 | } /* end of for loop */ | |
755 | } | |
756 | #endif | |
757 | ||
758 | if ((int_usb & MUSB_INTR_DISCONNECT) && !musb->ignore_disconnect) { | |
759 | DBG(1, "DISCONNECT (%s) as %s, devctl %02x\n", | |
760 | otg_state_string(musb), | |
761 | MUSB_MODE(musb), devctl); | |
762 | handled = IRQ_HANDLED; | |
763 | ||
84e250ff | 764 | switch (musb->xceiv->state) { |
550a7375 FB |
765 | #ifdef CONFIG_USB_MUSB_HDRC_HCD |
766 | case OTG_STATE_A_HOST: | |
767 | case OTG_STATE_A_SUSPEND: | |
5c23c907 | 768 | usb_hcd_resume_root_hub(musb_to_hcd(musb)); |
550a7375 | 769 | musb_root_disconnect(musb); |
74382171 | 770 | if (musb->a_wait_bcon != 0 && is_otg_enabled(musb)) |
550a7375 FB |
771 | musb_platform_try_idle(musb, jiffies |
772 | + msecs_to_jiffies(musb->a_wait_bcon)); | |
773 | break; | |
774 | #endif /* HOST */ | |
775 | #ifdef CONFIG_USB_MUSB_OTG | |
776 | case OTG_STATE_B_HOST: | |
ab983f2a DB |
777 | /* REVISIT this behaves for "real disconnect" |
778 | * cases; make sure the other transitions from | |
779 | * from B_HOST act right too. The B_HOST code | |
780 | * in hnp_stop() is currently not used... | |
781 | */ | |
782 | musb_root_disconnect(musb); | |
783 | musb_to_hcd(musb)->self.is_b_host = 0; | |
784 | musb->xceiv->state = OTG_STATE_B_PERIPHERAL; | |
785 | MUSB_DEV_MODE(musb); | |
786 | musb_g_disconnect(musb); | |
550a7375 FB |
787 | break; |
788 | case OTG_STATE_A_PERIPHERAL: | |
789 | musb_hnp_stop(musb); | |
790 | musb_root_disconnect(musb); | |
791 | /* FALLTHROUGH */ | |
792 | case OTG_STATE_B_WAIT_ACON: | |
793 | /* FALLTHROUGH */ | |
794 | #endif /* OTG */ | |
795 | #ifdef CONFIG_USB_GADGET_MUSB_HDRC | |
796 | case OTG_STATE_B_PERIPHERAL: | |
797 | case OTG_STATE_B_IDLE: | |
798 | musb_g_disconnect(musb); | |
799 | break; | |
800 | #endif /* GADGET */ | |
801 | default: | |
802 | WARNING("unhandled DISCONNECT transition (%s)\n", | |
803 | otg_state_string(musb)); | |
804 | break; | |
805 | } | |
806 | ||
807 | schedule_work(&musb->irq_work); | |
808 | } | |
809 | ||
810 | if (int_usb & MUSB_INTR_SUSPEND) { | |
811 | DBG(1, "SUSPEND (%s) devctl %02x power %02x\n", | |
812 | otg_state_string(musb), devctl, power); | |
813 | handled = IRQ_HANDLED; | |
814 | ||
84e250ff | 815 | switch (musb->xceiv->state) { |
550a7375 FB |
816 | #ifdef CONFIG_USB_MUSB_OTG |
817 | case OTG_STATE_A_PERIPHERAL: | |
ab983f2a DB |
818 | /* We also come here if the cable is removed, since |
819 | * this silicon doesn't report ID-no-longer-grounded. | |
820 | * | |
821 | * We depend on T(a_wait_bcon) to shut us down, and | |
822 | * hope users don't do anything dicey during this | |
823 | * undesired detour through A_WAIT_BCON. | |
550a7375 | 824 | */ |
ab983f2a DB |
825 | musb_hnp_stop(musb); |
826 | usb_hcd_resume_root_hub(musb_to_hcd(musb)); | |
827 | musb_root_disconnect(musb); | |
828 | musb_platform_try_idle(musb, jiffies | |
829 | + msecs_to_jiffies(musb->a_wait_bcon | |
830 | ? : OTG_TIME_A_WAIT_BCON)); | |
550a7375 FB |
831 | break; |
832 | #endif | |
833 | case OTG_STATE_B_PERIPHERAL: | |
834 | musb_g_suspend(musb); | |
835 | musb->is_active = is_otg_enabled(musb) | |
84e250ff | 836 | && musb->xceiv->gadget->b_hnp_enable; |
550a7375 FB |
837 | if (musb->is_active) { |
838 | #ifdef CONFIG_USB_MUSB_OTG | |
84e250ff | 839 | musb->xceiv->state = OTG_STATE_B_WAIT_ACON; |
550a7375 | 840 | DBG(1, "HNP: Setting timer for b_ase0_brst\n"); |
f7f9d63e DB |
841 | mod_timer(&musb->otg_timer, jiffies |
842 | + msecs_to_jiffies( | |
843 | OTG_TIME_B_ASE0_BRST)); | |
550a7375 FB |
844 | #endif |
845 | } | |
846 | break; | |
847 | case OTG_STATE_A_WAIT_BCON: | |
848 | if (musb->a_wait_bcon != 0) | |
849 | musb_platform_try_idle(musb, jiffies | |
850 | + msecs_to_jiffies(musb->a_wait_bcon)); | |
851 | break; | |
852 | case OTG_STATE_A_HOST: | |
84e250ff | 853 | musb->xceiv->state = OTG_STATE_A_SUSPEND; |
550a7375 | 854 | musb->is_active = is_otg_enabled(musb) |
84e250ff | 855 | && musb->xceiv->host->b_hnp_enable; |
550a7375 FB |
856 | break; |
857 | case OTG_STATE_B_HOST: | |
858 | /* Transition to B_PERIPHERAL, see 6.8.2.6 p 44 */ | |
859 | DBG(1, "REVISIT: SUSPEND as B_HOST\n"); | |
860 | break; | |
861 | default: | |
862 | /* "should not happen" */ | |
863 | musb->is_active = 0; | |
864 | break; | |
865 | } | |
866 | schedule_work(&musb->irq_work); | |
867 | } | |
868 | ||
869 | ||
870 | return handled; | |
871 | } | |
872 | ||
873 | /*-------------------------------------------------------------------------*/ | |
874 | ||
875 | /* | |
876 | * Program the HDRC to start (enable interrupts, dma, etc.). | |
877 | */ | |
878 | void musb_start(struct musb *musb) | |
879 | { | |
880 | void __iomem *regs = musb->mregs; | |
881 | u8 devctl = musb_readb(regs, MUSB_DEVCTL); | |
882 | ||
883 | DBG(2, "<== devctl %02x\n", devctl); | |
884 | ||
885 | /* Set INT enable registers, enable interrupts */ | |
886 | musb_writew(regs, MUSB_INTRTXE, musb->epmask); | |
887 | musb_writew(regs, MUSB_INTRRXE, musb->epmask & 0xfffe); | |
888 | musb_writeb(regs, MUSB_INTRUSBE, 0xf7); | |
889 | ||
890 | musb_writeb(regs, MUSB_TESTMODE, 0); | |
891 | ||
892 | /* put into basic highspeed mode and start session */ | |
893 | musb_writeb(regs, MUSB_POWER, MUSB_POWER_ISOUPDATE | |
894 | | MUSB_POWER_SOFTCONN | |
895 | | MUSB_POWER_HSENAB | |
896 | /* ENSUSPEND wedges tusb */ | |
897 | /* | MUSB_POWER_ENSUSPEND */ | |
898 | ); | |
899 | ||
900 | musb->is_active = 0; | |
901 | devctl = musb_readb(regs, MUSB_DEVCTL); | |
902 | devctl &= ~MUSB_DEVCTL_SESSION; | |
903 | ||
904 | if (is_otg_enabled(musb)) { | |
905 | /* session started after: | |
906 | * (a) ID-grounded irq, host mode; | |
907 | * (b) vbus present/connect IRQ, peripheral mode; | |
908 | * (c) peripheral initiates, using SRP | |
909 | */ | |
910 | if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS) | |
911 | musb->is_active = 1; | |
912 | else | |
913 | devctl |= MUSB_DEVCTL_SESSION; | |
914 | ||
915 | } else if (is_host_enabled(musb)) { | |
916 | /* assume ID pin is hard-wired to ground */ | |
917 | devctl |= MUSB_DEVCTL_SESSION; | |
918 | ||
919 | } else /* peripheral is enabled */ { | |
920 | if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS) | |
921 | musb->is_active = 1; | |
922 | } | |
923 | musb_platform_enable(musb); | |
924 | musb_writeb(regs, MUSB_DEVCTL, devctl); | |
925 | } | |
926 | ||
927 | ||
928 | static void musb_generic_disable(struct musb *musb) | |
929 | { | |
930 | void __iomem *mbase = musb->mregs; | |
931 | u16 temp; | |
932 | ||
933 | /* disable interrupts */ | |
934 | musb_writeb(mbase, MUSB_INTRUSBE, 0); | |
935 | musb_writew(mbase, MUSB_INTRTXE, 0); | |
936 | musb_writew(mbase, MUSB_INTRRXE, 0); | |
937 | ||
938 | /* off */ | |
939 | musb_writeb(mbase, MUSB_DEVCTL, 0); | |
940 | ||
941 | /* flush pending interrupts */ | |
942 | temp = musb_readb(mbase, MUSB_INTRUSB); | |
943 | temp = musb_readw(mbase, MUSB_INTRTX); | |
944 | temp = musb_readw(mbase, MUSB_INTRRX); | |
945 | ||
946 | } | |
947 | ||
948 | /* | |
949 | * Make the HDRC stop (disable interrupts, etc.); | |
950 | * reversible by musb_start | |
951 | * called on gadget driver unregister | |
952 | * with controller locked, irqs blocked | |
953 | * acts as a NOP unless some role activated the hardware | |
954 | */ | |
955 | void musb_stop(struct musb *musb) | |
956 | { | |
957 | /* stop IRQs, timers, ... */ | |
958 | musb_platform_disable(musb); | |
959 | musb_generic_disable(musb); | |
960 | DBG(3, "HDRC disabled\n"); | |
961 | ||
962 | /* FIXME | |
963 | * - mark host and/or peripheral drivers unusable/inactive | |
964 | * - disable DMA (and enable it in HdrcStart) | |
965 | * - make sure we can musb_start() after musb_stop(); with | |
966 | * OTG mode, gadget driver module rmmod/modprobe cycles that | |
967 | * - ... | |
968 | */ | |
969 | musb_platform_try_idle(musb, 0); | |
970 | } | |
971 | ||
972 | static void musb_shutdown(struct platform_device *pdev) | |
973 | { | |
974 | struct musb *musb = dev_to_musb(&pdev->dev); | |
975 | unsigned long flags; | |
976 | ||
977 | spin_lock_irqsave(&musb->lock, flags); | |
978 | musb_platform_disable(musb); | |
979 | musb_generic_disable(musb); | |
980 | if (musb->clock) { | |
981 | clk_put(musb->clock); | |
982 | musb->clock = NULL; | |
983 | } | |
984 | spin_unlock_irqrestore(&musb->lock, flags); | |
985 | ||
986 | /* FIXME power down */ | |
987 | } | |
988 | ||
989 | ||
990 | /*-------------------------------------------------------------------------*/ | |
991 | ||
992 | /* | |
993 | * The silicon either has hard-wired endpoint configurations, or else | |
994 | * "dynamic fifo" sizing. The driver has support for both, though at this | |
c767c1c6 DB |
995 | * writing only the dynamic sizing is very well tested. Since we switched |
996 | * away from compile-time hardware parameters, we can no longer rely on | |
997 | * dead code elimination to leave only the relevant one in the object file. | |
550a7375 FB |
998 | * |
999 | * We don't currently use dynamic fifo setup capability to do anything | |
1000 | * more than selecting one of a bunch of predefined configurations. | |
1001 | */ | |
550a7375 FB |
1002 | #if defined(CONFIG_USB_TUSB6010) || \ |
1003 | defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP34XX) | |
1004 | static ushort __initdata fifo_mode = 4; | |
1005 | #else | |
1006 | static ushort __initdata fifo_mode = 2; | |
1007 | #endif | |
1008 | ||
1009 | /* "modprobe ... fifo_mode=1" etc */ | |
1010 | module_param(fifo_mode, ushort, 0); | |
1011 | MODULE_PARM_DESC(fifo_mode, "initial endpoint configuration"); | |
1012 | ||
1013 | ||
550a7375 FB |
1014 | enum fifo_style { FIFO_RXTX, FIFO_TX, FIFO_RX } __attribute__ ((packed)); |
1015 | enum buf_mode { BUF_SINGLE, BUF_DOUBLE } __attribute__ ((packed)); | |
1016 | ||
1017 | struct fifo_cfg { | |
1018 | u8 hw_ep_num; | |
1019 | enum fifo_style style; | |
1020 | enum buf_mode mode; | |
1021 | u16 maxpacket; | |
1022 | }; | |
1023 | ||
1024 | /* | |
1025 | * tables defining fifo_mode values. define more if you like. | |
1026 | * for host side, make sure both halves of ep1 are set up. | |
1027 | */ | |
1028 | ||
1029 | /* mode 0 - fits in 2KB */ | |
1030 | static struct fifo_cfg __initdata mode_0_cfg[] = { | |
1031 | { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, }, | |
1032 | { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, }, | |
1033 | { .hw_ep_num = 2, .style = FIFO_RXTX, .maxpacket = 512, }, | |
1034 | { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, }, | |
1035 | { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, }, | |
1036 | }; | |
1037 | ||
1038 | /* mode 1 - fits in 4KB */ | |
1039 | static struct fifo_cfg __initdata mode_1_cfg[] = { | |
1040 | { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, .mode = BUF_DOUBLE, }, | |
1041 | { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, .mode = BUF_DOUBLE, }, | |
1042 | { .hw_ep_num = 2, .style = FIFO_RXTX, .maxpacket = 512, .mode = BUF_DOUBLE, }, | |
1043 | { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, }, | |
1044 | { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, }, | |
1045 | }; | |
1046 | ||
1047 | /* mode 2 - fits in 4KB */ | |
1048 | static struct fifo_cfg __initdata mode_2_cfg[] = { | |
1049 | { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, }, | |
1050 | { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, }, | |
1051 | { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, }, | |
1052 | { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, }, | |
1053 | { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, }, | |
1054 | { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, }, | |
1055 | }; | |
1056 | ||
1057 | /* mode 3 - fits in 4KB */ | |
1058 | static struct fifo_cfg __initdata mode_3_cfg[] = { | |
1059 | { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, .mode = BUF_DOUBLE, }, | |
1060 | { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, .mode = BUF_DOUBLE, }, | |
1061 | { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, }, | |
1062 | { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, }, | |
1063 | { .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, }, | |
1064 | { .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, }, | |
1065 | }; | |
1066 | ||
1067 | /* mode 4 - fits in 16KB */ | |
1068 | static struct fifo_cfg __initdata mode_4_cfg[] = { | |
1069 | { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, }, | |
1070 | { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, }, | |
1071 | { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, }, | |
1072 | { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, }, | |
1073 | { .hw_ep_num = 3, .style = FIFO_TX, .maxpacket = 512, }, | |
1074 | { .hw_ep_num = 3, .style = FIFO_RX, .maxpacket = 512, }, | |
1075 | { .hw_ep_num = 4, .style = FIFO_TX, .maxpacket = 512, }, | |
1076 | { .hw_ep_num = 4, .style = FIFO_RX, .maxpacket = 512, }, | |
1077 | { .hw_ep_num = 5, .style = FIFO_TX, .maxpacket = 512, }, | |
1078 | { .hw_ep_num = 5, .style = FIFO_RX, .maxpacket = 512, }, | |
1079 | { .hw_ep_num = 6, .style = FIFO_TX, .maxpacket = 512, }, | |
1080 | { .hw_ep_num = 6, .style = FIFO_RX, .maxpacket = 512, }, | |
1081 | { .hw_ep_num = 7, .style = FIFO_TX, .maxpacket = 512, }, | |
1082 | { .hw_ep_num = 7, .style = FIFO_RX, .maxpacket = 512, }, | |
1083 | { .hw_ep_num = 8, .style = FIFO_TX, .maxpacket = 512, }, | |
1084 | { .hw_ep_num = 8, .style = FIFO_RX, .maxpacket = 512, }, | |
1085 | { .hw_ep_num = 9, .style = FIFO_TX, .maxpacket = 512, }, | |
1086 | { .hw_ep_num = 9, .style = FIFO_RX, .maxpacket = 512, }, | |
a483d706 AKG |
1087 | { .hw_ep_num = 10, .style = FIFO_TX, .maxpacket = 256, }, |
1088 | { .hw_ep_num = 10, .style = FIFO_RX, .maxpacket = 64, }, | |
1089 | { .hw_ep_num = 11, .style = FIFO_TX, .maxpacket = 256, }, | |
1090 | { .hw_ep_num = 11, .style = FIFO_RX, .maxpacket = 64, }, | |
1091 | { .hw_ep_num = 12, .style = FIFO_TX, .maxpacket = 256, }, | |
1092 | { .hw_ep_num = 12, .style = FIFO_RX, .maxpacket = 64, }, | |
1093 | { .hw_ep_num = 13, .style = FIFO_RXTX, .maxpacket = 4096, }, | |
550a7375 FB |
1094 | { .hw_ep_num = 14, .style = FIFO_RXTX, .maxpacket = 1024, }, |
1095 | { .hw_ep_num = 15, .style = FIFO_RXTX, .maxpacket = 1024, }, | |
1096 | }; | |
1097 | ||
1098 | ||
1099 | /* | |
1100 | * configure a fifo; for non-shared endpoints, this may be called | |
1101 | * once for a tx fifo and once for an rx fifo. | |
1102 | * | |
1103 | * returns negative errno or offset for next fifo. | |
1104 | */ | |
1105 | static int __init | |
1106 | fifo_setup(struct musb *musb, struct musb_hw_ep *hw_ep, | |
1107 | const struct fifo_cfg *cfg, u16 offset) | |
1108 | { | |
1109 | void __iomem *mbase = musb->mregs; | |
1110 | int size = 0; | |
1111 | u16 maxpacket = cfg->maxpacket; | |
1112 | u16 c_off = offset >> 3; | |
1113 | u8 c_size; | |
1114 | ||
1115 | /* expect hw_ep has already been zero-initialized */ | |
1116 | ||
1117 | size = ffs(max(maxpacket, (u16) 8)) - 1; | |
1118 | maxpacket = 1 << size; | |
1119 | ||
1120 | c_size = size - 3; | |
1121 | if (cfg->mode == BUF_DOUBLE) { | |
ca6d1b13 FB |
1122 | if ((offset + (maxpacket << 1)) > |
1123 | (1 << (musb->config->ram_bits + 2))) | |
550a7375 FB |
1124 | return -EMSGSIZE; |
1125 | c_size |= MUSB_FIFOSZ_DPB; | |
1126 | } else { | |
ca6d1b13 | 1127 | if ((offset + maxpacket) > (1 << (musb->config->ram_bits + 2))) |
550a7375 FB |
1128 | return -EMSGSIZE; |
1129 | } | |
1130 | ||
1131 | /* configure the FIFO */ | |
1132 | musb_writeb(mbase, MUSB_INDEX, hw_ep->epnum); | |
1133 | ||
1134 | #ifdef CONFIG_USB_MUSB_HDRC_HCD | |
1135 | /* EP0 reserved endpoint for control, bidirectional; | |
1136 | * EP1 reserved for bulk, two unidirection halves. | |
1137 | */ | |
1138 | if (hw_ep->epnum == 1) | |
1139 | musb->bulk_ep = hw_ep; | |
1140 | /* REVISIT error check: be sure ep0 can both rx and tx ... */ | |
1141 | #endif | |
1142 | switch (cfg->style) { | |
1143 | case FIFO_TX: | |
c6cf8b00 BW |
1144 | musb_write_txfifosz(mbase, c_size); |
1145 | musb_write_txfifoadd(mbase, c_off); | |
550a7375 FB |
1146 | hw_ep->tx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB); |
1147 | hw_ep->max_packet_sz_tx = maxpacket; | |
1148 | break; | |
1149 | case FIFO_RX: | |
c6cf8b00 BW |
1150 | musb_write_rxfifosz(mbase, c_size); |
1151 | musb_write_rxfifoadd(mbase, c_off); | |
550a7375 FB |
1152 | hw_ep->rx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB); |
1153 | hw_ep->max_packet_sz_rx = maxpacket; | |
1154 | break; | |
1155 | case FIFO_RXTX: | |
c6cf8b00 BW |
1156 | musb_write_txfifosz(mbase, c_size); |
1157 | musb_write_txfifoadd(mbase, c_off); | |
550a7375 FB |
1158 | hw_ep->rx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB); |
1159 | hw_ep->max_packet_sz_rx = maxpacket; | |
1160 | ||
c6cf8b00 BW |
1161 | musb_write_rxfifosz(mbase, c_size); |
1162 | musb_write_rxfifoadd(mbase, c_off); | |
550a7375 FB |
1163 | hw_ep->tx_double_buffered = hw_ep->rx_double_buffered; |
1164 | hw_ep->max_packet_sz_tx = maxpacket; | |
1165 | ||
1166 | hw_ep->is_shared_fifo = true; | |
1167 | break; | |
1168 | } | |
1169 | ||
1170 | /* NOTE rx and tx endpoint irqs aren't managed separately, | |
1171 | * which happens to be ok | |
1172 | */ | |
1173 | musb->epmask |= (1 << hw_ep->epnum); | |
1174 | ||
1175 | return offset + (maxpacket << ((c_size & MUSB_FIFOSZ_DPB) ? 1 : 0)); | |
1176 | } | |
1177 | ||
1178 | static struct fifo_cfg __initdata ep0_cfg = { | |
1179 | .style = FIFO_RXTX, .maxpacket = 64, | |
1180 | }; | |
1181 | ||
1182 | static int __init ep_config_from_table(struct musb *musb) | |
1183 | { | |
1184 | const struct fifo_cfg *cfg; | |
1185 | unsigned i, n; | |
1186 | int offset; | |
1187 | struct musb_hw_ep *hw_ep = musb->endpoints; | |
1188 | ||
1189 | switch (fifo_mode) { | |
1190 | default: | |
1191 | fifo_mode = 0; | |
1192 | /* FALLTHROUGH */ | |
1193 | case 0: | |
1194 | cfg = mode_0_cfg; | |
1195 | n = ARRAY_SIZE(mode_0_cfg); | |
1196 | break; | |
1197 | case 1: | |
1198 | cfg = mode_1_cfg; | |
1199 | n = ARRAY_SIZE(mode_1_cfg); | |
1200 | break; | |
1201 | case 2: | |
1202 | cfg = mode_2_cfg; | |
1203 | n = ARRAY_SIZE(mode_2_cfg); | |
1204 | break; | |
1205 | case 3: | |
1206 | cfg = mode_3_cfg; | |
1207 | n = ARRAY_SIZE(mode_3_cfg); | |
1208 | break; | |
1209 | case 4: | |
1210 | cfg = mode_4_cfg; | |
1211 | n = ARRAY_SIZE(mode_4_cfg); | |
1212 | break; | |
1213 | } | |
1214 | ||
1215 | printk(KERN_DEBUG "%s: setup fifo_mode %d\n", | |
1216 | musb_driver_name, fifo_mode); | |
1217 | ||
1218 | ||
1219 | offset = fifo_setup(musb, hw_ep, &ep0_cfg, 0); | |
1220 | /* assert(offset > 0) */ | |
1221 | ||
1222 | /* NOTE: for RTL versions >= 1.400 EPINFO and RAMINFO would | |
ca6d1b13 | 1223 | * be better than static musb->config->num_eps and DYN_FIFO_SIZE... |
550a7375 FB |
1224 | */ |
1225 | ||
1226 | for (i = 0; i < n; i++) { | |
1227 | u8 epn = cfg->hw_ep_num; | |
1228 | ||
ca6d1b13 | 1229 | if (epn >= musb->config->num_eps) { |
550a7375 FB |
1230 | pr_debug("%s: invalid ep %d\n", |
1231 | musb_driver_name, epn); | |
bb1c9ef1 | 1232 | return -EINVAL; |
550a7375 FB |
1233 | } |
1234 | offset = fifo_setup(musb, hw_ep + epn, cfg++, offset); | |
1235 | if (offset < 0) { | |
1236 | pr_debug("%s: mem overrun, ep %d\n", | |
1237 | musb_driver_name, epn); | |
1238 | return -EINVAL; | |
1239 | } | |
1240 | epn++; | |
1241 | musb->nr_endpoints = max(epn, musb->nr_endpoints); | |
1242 | } | |
1243 | ||
1244 | printk(KERN_DEBUG "%s: %d/%d max ep, %d/%d memory\n", | |
1245 | musb_driver_name, | |
ca6d1b13 FB |
1246 | n + 1, musb->config->num_eps * 2 - 1, |
1247 | offset, (1 << (musb->config->ram_bits + 2))); | |
550a7375 FB |
1248 | |
1249 | #ifdef CONFIG_USB_MUSB_HDRC_HCD | |
1250 | if (!musb->bulk_ep) { | |
1251 | pr_debug("%s: missing bulk\n", musb_driver_name); | |
1252 | return -EINVAL; | |
1253 | } | |
1254 | #endif | |
1255 | ||
1256 | return 0; | |
1257 | } | |
1258 | ||
1259 | ||
1260 | /* | |
1261 | * ep_config_from_hw - when MUSB_C_DYNFIFO_DEF is false | |
1262 | * @param musb the controller | |
1263 | */ | |
1264 | static int __init ep_config_from_hw(struct musb *musb) | |
1265 | { | |
c6cf8b00 | 1266 | u8 epnum = 0; |
550a7375 FB |
1267 | struct musb_hw_ep *hw_ep; |
1268 | void *mbase = musb->mregs; | |
c6cf8b00 | 1269 | int ret = 0; |
550a7375 FB |
1270 | |
1271 | DBG(2, "<== static silicon ep config\n"); | |
1272 | ||
1273 | /* FIXME pick up ep0 maxpacket size */ | |
1274 | ||
ca6d1b13 | 1275 | for (epnum = 1; epnum < musb->config->num_eps; epnum++) { |
550a7375 FB |
1276 | musb_ep_select(mbase, epnum); |
1277 | hw_ep = musb->endpoints + epnum; | |
1278 | ||
c6cf8b00 BW |
1279 | ret = musb_read_fifosize(musb, hw_ep, epnum); |
1280 | if (ret < 0) | |
550a7375 | 1281 | break; |
550a7375 FB |
1282 | |
1283 | /* FIXME set up hw_ep->{rx,tx}_double_buffered */ | |
1284 | ||
1285 | #ifdef CONFIG_USB_MUSB_HDRC_HCD | |
1286 | /* pick an RX/TX endpoint for bulk */ | |
1287 | if (hw_ep->max_packet_sz_tx < 512 | |
1288 | || hw_ep->max_packet_sz_rx < 512) | |
1289 | continue; | |
1290 | ||
1291 | /* REVISIT: this algorithm is lazy, we should at least | |
1292 | * try to pick a double buffered endpoint. | |
1293 | */ | |
1294 | if (musb->bulk_ep) | |
1295 | continue; | |
1296 | musb->bulk_ep = hw_ep; | |
1297 | #endif | |
1298 | } | |
1299 | ||
1300 | #ifdef CONFIG_USB_MUSB_HDRC_HCD | |
1301 | if (!musb->bulk_ep) { | |
1302 | pr_debug("%s: missing bulk\n", musb_driver_name); | |
1303 | return -EINVAL; | |
1304 | } | |
1305 | #endif | |
1306 | ||
1307 | return 0; | |
1308 | } | |
1309 | ||
1310 | enum { MUSB_CONTROLLER_MHDRC, MUSB_CONTROLLER_HDRC, }; | |
1311 | ||
1312 | /* Initialize MUSB (M)HDRC part of the USB hardware subsystem; | |
1313 | * configure endpoints, or take their config from silicon | |
1314 | */ | |
1315 | static int __init musb_core_init(u16 musb_type, struct musb *musb) | |
1316 | { | |
1317 | #ifdef MUSB_AHB_ID | |
1318 | u32 data; | |
1319 | #endif | |
1320 | u8 reg; | |
1321 | char *type; | |
550a7375 FB |
1322 | char aInfo[78], aRevision[32], aDate[12]; |
1323 | void __iomem *mbase = musb->mregs; | |
1324 | int status = 0; | |
1325 | int i; | |
1326 | ||
1327 | /* log core options (read using indexed model) */ | |
c6cf8b00 | 1328 | reg = musb_read_configdata(mbase); |
550a7375 FB |
1329 | |
1330 | strcpy(aInfo, (reg & MUSB_CONFIGDATA_UTMIDW) ? "UTMI-16" : "UTMI-8"); | |
1331 | if (reg & MUSB_CONFIGDATA_DYNFIFO) | |
1332 | strcat(aInfo, ", dyn FIFOs"); | |
1333 | if (reg & MUSB_CONFIGDATA_MPRXE) { | |
1334 | strcat(aInfo, ", bulk combine"); | |
1335 | #ifdef C_MP_RX | |
1336 | musb->bulk_combine = true; | |
1337 | #else | |
1338 | strcat(aInfo, " (X)"); /* no driver support */ | |
1339 | #endif | |
1340 | } | |
1341 | if (reg & MUSB_CONFIGDATA_MPTXE) { | |
1342 | strcat(aInfo, ", bulk split"); | |
1343 | #ifdef C_MP_TX | |
1344 | musb->bulk_split = true; | |
1345 | #else | |
1346 | strcat(aInfo, " (X)"); /* no driver support */ | |
1347 | #endif | |
1348 | } | |
1349 | if (reg & MUSB_CONFIGDATA_HBRXE) { | |
1350 | strcat(aInfo, ", HB-ISO Rx"); | |
a483d706 | 1351 | musb->hb_iso_rx = true; |
550a7375 FB |
1352 | } |
1353 | if (reg & MUSB_CONFIGDATA_HBTXE) { | |
1354 | strcat(aInfo, ", HB-ISO Tx"); | |
a483d706 | 1355 | musb->hb_iso_tx = true; |
550a7375 FB |
1356 | } |
1357 | if (reg & MUSB_CONFIGDATA_SOFTCONE) | |
1358 | strcat(aInfo, ", SoftConn"); | |
1359 | ||
1360 | printk(KERN_DEBUG "%s: ConfigData=0x%02x (%s)\n", | |
1361 | musb_driver_name, reg, aInfo); | |
1362 | ||
1363 | #ifdef MUSB_AHB_ID | |
1364 | data = musb_readl(mbase, 0x404); | |
1365 | sprintf(aDate, "%04d-%02x-%02x", (data & 0xffff), | |
1366 | (data >> 16) & 0xff, (data >> 24) & 0xff); | |
1367 | /* FIXME ID2 and ID3 are unused */ | |
1368 | data = musb_readl(mbase, 0x408); | |
1369 | printk(KERN_DEBUG "ID2=%lx\n", (long unsigned)data); | |
1370 | data = musb_readl(mbase, 0x40c); | |
1371 | printk(KERN_DEBUG "ID3=%lx\n", (long unsigned)data); | |
1372 | reg = musb_readb(mbase, 0x400); | |
1373 | musb_type = ('M' == reg) ? MUSB_CONTROLLER_MHDRC : MUSB_CONTROLLER_HDRC; | |
1374 | #else | |
1375 | aDate[0] = 0; | |
1376 | #endif | |
1377 | if (MUSB_CONTROLLER_MHDRC == musb_type) { | |
1378 | musb->is_multipoint = 1; | |
1379 | type = "M"; | |
1380 | } else { | |
1381 | musb->is_multipoint = 0; | |
1382 | type = ""; | |
1383 | #ifdef CONFIG_USB_MUSB_HDRC_HCD | |
1384 | #ifndef CONFIG_USB_OTG_BLACKLIST_HUB | |
1385 | printk(KERN_ERR | |
1386 | "%s: kernel must blacklist external hubs\n", | |
1387 | musb_driver_name); | |
1388 | #endif | |
1389 | #endif | |
1390 | } | |
1391 | ||
1392 | /* log release info */ | |
32c3b94e AG |
1393 | musb->hwvers = musb_read_hwvers(mbase); |
1394 | snprintf(aRevision, 32, "%d.%d%s", MUSB_HWVERS_MAJOR(musb->hwvers), | |
1395 | MUSB_HWVERS_MINOR(musb->hwvers), | |
1396 | (musb->hwvers & MUSB_HWVERS_RC) ? "RC" : ""); | |
550a7375 FB |
1397 | printk(KERN_DEBUG "%s: %sHDRC RTL version %s %s\n", |
1398 | musb_driver_name, type, aRevision, aDate); | |
1399 | ||
1400 | /* configure ep0 */ | |
c6cf8b00 | 1401 | musb_configure_ep0(musb); |
550a7375 FB |
1402 | |
1403 | /* discover endpoint configuration */ | |
1404 | musb->nr_endpoints = 1; | |
1405 | musb->epmask = 1; | |
1406 | ||
1407 | if (reg & MUSB_CONFIGDATA_DYNFIFO) { | |
ca6d1b13 | 1408 | if (musb->config->dyn_fifo) |
550a7375 FB |
1409 | status = ep_config_from_table(musb); |
1410 | else { | |
1411 | ERR("reconfigure software for Dynamic FIFOs\n"); | |
1412 | status = -ENODEV; | |
1413 | } | |
1414 | } else { | |
ca6d1b13 | 1415 | if (!musb->config->dyn_fifo) |
550a7375 FB |
1416 | status = ep_config_from_hw(musb); |
1417 | else { | |
1418 | ERR("reconfigure software for static FIFOs\n"); | |
1419 | return -ENODEV; | |
1420 | } | |
1421 | } | |
1422 | ||
1423 | if (status < 0) | |
1424 | return status; | |
1425 | ||
1426 | /* finish init, and print endpoint config */ | |
1427 | for (i = 0; i < musb->nr_endpoints; i++) { | |
1428 | struct musb_hw_ep *hw_ep = musb->endpoints + i; | |
1429 | ||
1430 | hw_ep->fifo = MUSB_FIFO_OFFSET(i) + mbase; | |
1431 | #ifdef CONFIG_USB_TUSB6010 | |
1432 | hw_ep->fifo_async = musb->async + 0x400 + MUSB_FIFO_OFFSET(i); | |
1433 | hw_ep->fifo_sync = musb->sync + 0x400 + MUSB_FIFO_OFFSET(i); | |
1434 | hw_ep->fifo_sync_va = | |
1435 | musb->sync_va + 0x400 + MUSB_FIFO_OFFSET(i); | |
1436 | ||
1437 | if (i == 0) | |
1438 | hw_ep->conf = mbase - 0x400 + TUSB_EP0_CONF; | |
1439 | else | |
1440 | hw_ep->conf = mbase + 0x400 + (((i - 1) & 0xf) << 2); | |
1441 | #endif | |
1442 | ||
1443 | hw_ep->regs = MUSB_EP_OFFSET(i, 0) + mbase; | |
1444 | #ifdef CONFIG_USB_MUSB_HDRC_HCD | |
c6cf8b00 | 1445 | hw_ep->target_regs = musb_read_target_reg_base(i, mbase); |
550a7375 FB |
1446 | hw_ep->rx_reinit = 1; |
1447 | hw_ep->tx_reinit = 1; | |
1448 | #endif | |
1449 | ||
1450 | if (hw_ep->max_packet_sz_tx) { | |
1230435c | 1451 | DBG(1, |
550a7375 FB |
1452 | "%s: hw_ep %d%s, %smax %d\n", |
1453 | musb_driver_name, i, | |
1454 | hw_ep->is_shared_fifo ? "shared" : "tx", | |
1455 | hw_ep->tx_double_buffered | |
1456 | ? "doublebuffer, " : "", | |
1457 | hw_ep->max_packet_sz_tx); | |
1458 | } | |
1459 | if (hw_ep->max_packet_sz_rx && !hw_ep->is_shared_fifo) { | |
1230435c | 1460 | DBG(1, |
550a7375 FB |
1461 | "%s: hw_ep %d%s, %smax %d\n", |
1462 | musb_driver_name, i, | |
1463 | "rx", | |
1464 | hw_ep->rx_double_buffered | |
1465 | ? "doublebuffer, " : "", | |
1466 | hw_ep->max_packet_sz_rx); | |
1467 | } | |
1468 | if (!(hw_ep->max_packet_sz_tx || hw_ep->max_packet_sz_rx)) | |
1469 | DBG(1, "hw_ep %d not configured\n", i); | |
1470 | } | |
1471 | ||
1472 | return 0; | |
1473 | } | |
1474 | ||
1475 | /*-------------------------------------------------------------------------*/ | |
1476 | ||
1477 | #if defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP3430) | |
1478 | ||
1479 | static irqreturn_t generic_interrupt(int irq, void *__hci) | |
1480 | { | |
1481 | unsigned long flags; | |
1482 | irqreturn_t retval = IRQ_NONE; | |
1483 | struct musb *musb = __hci; | |
1484 | ||
1485 | spin_lock_irqsave(&musb->lock, flags); | |
1486 | ||
1487 | musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB); | |
1488 | musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX); | |
1489 | musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX); | |
1490 | ||
1491 | if (musb->int_usb || musb->int_tx || musb->int_rx) | |
1492 | retval = musb_interrupt(musb); | |
1493 | ||
1494 | spin_unlock_irqrestore(&musb->lock, flags); | |
1495 | ||
a5073b52 | 1496 | return retval; |
550a7375 FB |
1497 | } |
1498 | ||
1499 | #else | |
1500 | #define generic_interrupt NULL | |
1501 | #endif | |
1502 | ||
1503 | /* | |
1504 | * handle all the irqs defined by the HDRC core. for now we expect: other | |
1505 | * irq sources (phy, dma, etc) will be handled first, musb->int_* values | |
1506 | * will be assigned, and the irq will already have been acked. | |
1507 | * | |
1508 | * called in irq context with spinlock held, irqs blocked | |
1509 | */ | |
1510 | irqreturn_t musb_interrupt(struct musb *musb) | |
1511 | { | |
1512 | irqreturn_t retval = IRQ_NONE; | |
1513 | u8 devctl, power; | |
1514 | int ep_num; | |
1515 | u32 reg; | |
1516 | ||
1517 | devctl = musb_readb(musb->mregs, MUSB_DEVCTL); | |
1518 | power = musb_readb(musb->mregs, MUSB_POWER); | |
1519 | ||
1520 | DBG(4, "** IRQ %s usb%04x tx%04x rx%04x\n", | |
1521 | (devctl & MUSB_DEVCTL_HM) ? "host" : "peripheral", | |
1522 | musb->int_usb, musb->int_tx, musb->int_rx); | |
1523 | ||
1524 | /* the core can interrupt us for multiple reasons; docs have | |
1525 | * a generic interrupt flowchart to follow | |
1526 | */ | |
1527 | if (musb->int_usb & STAGE0_MASK) | |
1528 | retval |= musb_stage0_irq(musb, musb->int_usb, | |
1529 | devctl, power); | |
1530 | ||
1531 | /* "stage 1" is handling endpoint irqs */ | |
1532 | ||
1533 | /* handle endpoint 0 first */ | |
1534 | if (musb->int_tx & 1) { | |
1535 | if (devctl & MUSB_DEVCTL_HM) | |
1536 | retval |= musb_h_ep0_irq(musb); | |
1537 | else | |
1538 | retval |= musb_g_ep0_irq(musb); | |
1539 | } | |
1540 | ||
1541 | /* RX on endpoints 1-15 */ | |
1542 | reg = musb->int_rx >> 1; | |
1543 | ep_num = 1; | |
1544 | while (reg) { | |
1545 | if (reg & 1) { | |
1546 | /* musb_ep_select(musb->mregs, ep_num); */ | |
1547 | /* REVISIT just retval = ep->rx_irq(...) */ | |
1548 | retval = IRQ_HANDLED; | |
1549 | if (devctl & MUSB_DEVCTL_HM) { | |
1550 | if (is_host_capable()) | |
1551 | musb_host_rx(musb, ep_num); | |
1552 | } else { | |
1553 | if (is_peripheral_capable()) | |
1554 | musb_g_rx(musb, ep_num); | |
1555 | } | |
1556 | } | |
1557 | ||
1558 | reg >>= 1; | |
1559 | ep_num++; | |
1560 | } | |
1561 | ||
1562 | /* TX on endpoints 1-15 */ | |
1563 | reg = musb->int_tx >> 1; | |
1564 | ep_num = 1; | |
1565 | while (reg) { | |
1566 | if (reg & 1) { | |
1567 | /* musb_ep_select(musb->mregs, ep_num); */ | |
1568 | /* REVISIT just retval |= ep->tx_irq(...) */ | |
1569 | retval = IRQ_HANDLED; | |
1570 | if (devctl & MUSB_DEVCTL_HM) { | |
1571 | if (is_host_capable()) | |
1572 | musb_host_tx(musb, ep_num); | |
1573 | } else { | |
1574 | if (is_peripheral_capable()) | |
1575 | musb_g_tx(musb, ep_num); | |
1576 | } | |
1577 | } | |
1578 | reg >>= 1; | |
1579 | ep_num++; | |
1580 | } | |
1581 | ||
1582 | /* finish handling "global" interrupts after handling fifos */ | |
1583 | if (musb->int_usb) | |
1584 | retval |= musb_stage2_irq(musb, | |
1585 | musb->int_usb, devctl, power); | |
1586 | ||
1587 | return retval; | |
1588 | } | |
1589 | ||
1590 | ||
1591 | #ifndef CONFIG_MUSB_PIO_ONLY | |
1592 | static int __initdata use_dma = 1; | |
1593 | ||
1594 | /* "modprobe ... use_dma=0" etc */ | |
1595 | module_param(use_dma, bool, 0); | |
1596 | MODULE_PARM_DESC(use_dma, "enable/disable use of DMA"); | |
1597 | ||
1598 | void musb_dma_completion(struct musb *musb, u8 epnum, u8 transmit) | |
1599 | { | |
1600 | u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL); | |
1601 | ||
1602 | /* called with controller lock already held */ | |
1603 | ||
1604 | if (!epnum) { | |
1605 | #ifndef CONFIG_USB_TUSB_OMAP_DMA | |
1606 | if (!is_cppi_enabled()) { | |
1607 | /* endpoint 0 */ | |
1608 | if (devctl & MUSB_DEVCTL_HM) | |
1609 | musb_h_ep0_irq(musb); | |
1610 | else | |
1611 | musb_g_ep0_irq(musb); | |
1612 | } | |
1613 | #endif | |
1614 | } else { | |
1615 | /* endpoints 1..15 */ | |
1616 | if (transmit) { | |
1617 | if (devctl & MUSB_DEVCTL_HM) { | |
1618 | if (is_host_capable()) | |
1619 | musb_host_tx(musb, epnum); | |
1620 | } else { | |
1621 | if (is_peripheral_capable()) | |
1622 | musb_g_tx(musb, epnum); | |
1623 | } | |
1624 | } else { | |
1625 | /* receive */ | |
1626 | if (devctl & MUSB_DEVCTL_HM) { | |
1627 | if (is_host_capable()) | |
1628 | musb_host_rx(musb, epnum); | |
1629 | } else { | |
1630 | if (is_peripheral_capable()) | |
1631 | musb_g_rx(musb, epnum); | |
1632 | } | |
1633 | } | |
1634 | } | |
1635 | } | |
1636 | ||
1637 | #else | |
1638 | #define use_dma 0 | |
1639 | #endif | |
1640 | ||
1641 | /*-------------------------------------------------------------------------*/ | |
1642 | ||
1643 | #ifdef CONFIG_SYSFS | |
1644 | ||
1645 | static ssize_t | |
1646 | musb_mode_show(struct device *dev, struct device_attribute *attr, char *buf) | |
1647 | { | |
1648 | struct musb *musb = dev_to_musb(dev); | |
1649 | unsigned long flags; | |
1650 | int ret = -EINVAL; | |
1651 | ||
1652 | spin_lock_irqsave(&musb->lock, flags); | |
1653 | ret = sprintf(buf, "%s\n", otg_state_string(musb)); | |
1654 | spin_unlock_irqrestore(&musb->lock, flags); | |
1655 | ||
1656 | return ret; | |
1657 | } | |
1658 | ||
1659 | static ssize_t | |
1660 | musb_mode_store(struct device *dev, struct device_attribute *attr, | |
1661 | const char *buf, size_t n) | |
1662 | { | |
1663 | struct musb *musb = dev_to_musb(dev); | |
1664 | unsigned long flags; | |
96a274d1 | 1665 | int status; |
550a7375 FB |
1666 | |
1667 | spin_lock_irqsave(&musb->lock, flags); | |
96a274d1 DB |
1668 | if (sysfs_streq(buf, "host")) |
1669 | status = musb_platform_set_mode(musb, MUSB_HOST); | |
1670 | else if (sysfs_streq(buf, "peripheral")) | |
1671 | status = musb_platform_set_mode(musb, MUSB_PERIPHERAL); | |
1672 | else if (sysfs_streq(buf, "otg")) | |
1673 | status = musb_platform_set_mode(musb, MUSB_OTG); | |
1674 | else | |
1675 | status = -EINVAL; | |
550a7375 FB |
1676 | spin_unlock_irqrestore(&musb->lock, flags); |
1677 | ||
96a274d1 | 1678 | return (status == 0) ? n : status; |
550a7375 FB |
1679 | } |
1680 | static DEVICE_ATTR(mode, 0644, musb_mode_show, musb_mode_store); | |
1681 | ||
1682 | static ssize_t | |
1683 | musb_vbus_store(struct device *dev, struct device_attribute *attr, | |
1684 | const char *buf, size_t n) | |
1685 | { | |
1686 | struct musb *musb = dev_to_musb(dev); | |
1687 | unsigned long flags; | |
1688 | unsigned long val; | |
1689 | ||
1690 | if (sscanf(buf, "%lu", &val) < 1) { | |
1691 | printk(KERN_ERR "Invalid VBUS timeout ms value\n"); | |
1692 | return -EINVAL; | |
1693 | } | |
1694 | ||
1695 | spin_lock_irqsave(&musb->lock, flags); | |
f7f9d63e DB |
1696 | /* force T(a_wait_bcon) to be zero/unlimited *OR* valid */ |
1697 | musb->a_wait_bcon = val ? max_t(int, val, OTG_TIME_A_WAIT_BCON) : 0 ; | |
84e250ff | 1698 | if (musb->xceiv->state == OTG_STATE_A_WAIT_BCON) |
550a7375 FB |
1699 | musb->is_active = 0; |
1700 | musb_platform_try_idle(musb, jiffies + msecs_to_jiffies(val)); | |
1701 | spin_unlock_irqrestore(&musb->lock, flags); | |
1702 | ||
1703 | return n; | |
1704 | } | |
1705 | ||
1706 | static ssize_t | |
1707 | musb_vbus_show(struct device *dev, struct device_attribute *attr, char *buf) | |
1708 | { | |
1709 | struct musb *musb = dev_to_musb(dev); | |
1710 | unsigned long flags; | |
1711 | unsigned long val; | |
1712 | int vbus; | |
1713 | ||
1714 | spin_lock_irqsave(&musb->lock, flags); | |
1715 | val = musb->a_wait_bcon; | |
f7f9d63e DB |
1716 | /* FIXME get_vbus_status() is normally #defined as false... |
1717 | * and is effectively TUSB-specific. | |
1718 | */ | |
550a7375 FB |
1719 | vbus = musb_platform_get_vbus_status(musb); |
1720 | spin_unlock_irqrestore(&musb->lock, flags); | |
1721 | ||
f7f9d63e | 1722 | return sprintf(buf, "Vbus %s, timeout %lu msec\n", |
550a7375 FB |
1723 | vbus ? "on" : "off", val); |
1724 | } | |
1725 | static DEVICE_ATTR(vbus, 0644, musb_vbus_show, musb_vbus_store); | |
1726 | ||
1727 | #ifdef CONFIG_USB_GADGET_MUSB_HDRC | |
1728 | ||
1729 | /* Gadget drivers can't know that a host is connected so they might want | |
1730 | * to start SRP, but users can. This allows userspace to trigger SRP. | |
1731 | */ | |
1732 | static ssize_t | |
1733 | musb_srp_store(struct device *dev, struct device_attribute *attr, | |
1734 | const char *buf, size_t n) | |
1735 | { | |
1736 | struct musb *musb = dev_to_musb(dev); | |
1737 | unsigned short srp; | |
1738 | ||
1739 | if (sscanf(buf, "%hu", &srp) != 1 | |
1740 | || (srp != 1)) { | |
1741 | printk(KERN_ERR "SRP: Value must be 1\n"); | |
1742 | return -EINVAL; | |
1743 | } | |
1744 | ||
1745 | if (srp == 1) | |
1746 | musb_g_wakeup(musb); | |
1747 | ||
1748 | return n; | |
1749 | } | |
1750 | static DEVICE_ATTR(srp, 0644, NULL, musb_srp_store); | |
1751 | ||
1752 | #endif /* CONFIG_USB_GADGET_MUSB_HDRC */ | |
1753 | ||
1754 | #endif /* sysfs */ | |
1755 | ||
1756 | /* Only used to provide driver mode change events */ | |
1757 | static void musb_irq_work(struct work_struct *data) | |
1758 | { | |
1759 | struct musb *musb = container_of(data, struct musb, irq_work); | |
1760 | static int old_state; | |
1761 | ||
84e250ff DB |
1762 | if (musb->xceiv->state != old_state) { |
1763 | old_state = musb->xceiv->state; | |
550a7375 FB |
1764 | sysfs_notify(&musb->controller->kobj, NULL, "mode"); |
1765 | } | |
1766 | } | |
1767 | ||
1768 | /* -------------------------------------------------------------------------- | |
1769 | * Init support | |
1770 | */ | |
1771 | ||
1772 | static struct musb *__init | |
ca6d1b13 FB |
1773 | allocate_instance(struct device *dev, |
1774 | struct musb_hdrc_config *config, void __iomem *mbase) | |
550a7375 FB |
1775 | { |
1776 | struct musb *musb; | |
1777 | struct musb_hw_ep *ep; | |
1778 | int epnum; | |
1779 | #ifdef CONFIG_USB_MUSB_HDRC_HCD | |
1780 | struct usb_hcd *hcd; | |
1781 | ||
427c4f33 | 1782 | hcd = usb_create_hcd(&musb_hc_driver, dev, dev_name(dev)); |
550a7375 FB |
1783 | if (!hcd) |
1784 | return NULL; | |
1785 | /* usbcore sets dev->driver_data to hcd, and sometimes uses that... */ | |
1786 | ||
1787 | musb = hcd_to_musb(hcd); | |
1788 | INIT_LIST_HEAD(&musb->control); | |
1789 | INIT_LIST_HEAD(&musb->in_bulk); | |
1790 | INIT_LIST_HEAD(&musb->out_bulk); | |
1791 | ||
1792 | hcd->uses_new_polling = 1; | |
1793 | ||
1794 | musb->vbuserr_retry = VBUSERR_RETRY_COUNT; | |
f7f9d63e | 1795 | musb->a_wait_bcon = OTG_TIME_A_WAIT_BCON; |
550a7375 FB |
1796 | #else |
1797 | musb = kzalloc(sizeof *musb, GFP_KERNEL); | |
1798 | if (!musb) | |
1799 | return NULL; | |
1800 | dev_set_drvdata(dev, musb); | |
1801 | ||
1802 | #endif | |
1803 | ||
1804 | musb->mregs = mbase; | |
1805 | musb->ctrl_base = mbase; | |
1806 | musb->nIrq = -ENODEV; | |
ca6d1b13 | 1807 | musb->config = config; |
02582b92 | 1808 | BUG_ON(musb->config->num_eps > MUSB_C_NUM_EPS); |
550a7375 | 1809 | for (epnum = 0, ep = musb->endpoints; |
ca6d1b13 | 1810 | epnum < musb->config->num_eps; |
550a7375 | 1811 | epnum++, ep++) { |
550a7375 FB |
1812 | ep->musb = musb; |
1813 | ep->epnum = epnum; | |
1814 | } | |
1815 | ||
1816 | musb->controller = dev; | |
1817 | return musb; | |
1818 | } | |
1819 | ||
1820 | static void musb_free(struct musb *musb) | |
1821 | { | |
1822 | /* this has multiple entry modes. it handles fault cleanup after | |
1823 | * probe(), where things may be partially set up, as well as rmmod | |
1824 | * cleanup after everything's been de-activated. | |
1825 | */ | |
1826 | ||
1827 | #ifdef CONFIG_SYSFS | |
1828 | device_remove_file(musb->controller, &dev_attr_mode); | |
1829 | device_remove_file(musb->controller, &dev_attr_vbus); | |
e7479512 | 1830 | #ifdef CONFIG_USB_GADGET_MUSB_HDRC |
550a7375 FB |
1831 | device_remove_file(musb->controller, &dev_attr_srp); |
1832 | #endif | |
1833 | #endif | |
1834 | ||
1835 | #ifdef CONFIG_USB_GADGET_MUSB_HDRC | |
1836 | musb_gadget_cleanup(musb); | |
1837 | #endif | |
1838 | ||
97a39896 AKG |
1839 | if (musb->nIrq >= 0) { |
1840 | if (musb->irq_wake) | |
1841 | disable_irq_wake(musb->nIrq); | |
550a7375 FB |
1842 | free_irq(musb->nIrq, musb); |
1843 | } | |
1844 | if (is_dma_capable() && musb->dma_controller) { | |
1845 | struct dma_controller *c = musb->dma_controller; | |
1846 | ||
1847 | (void) c->stop(c); | |
1848 | dma_controller_destroy(c); | |
1849 | } | |
1850 | ||
c740d0d8 AKG |
1851 | #ifdef CONFIG_USB_MUSB_OTG |
1852 | put_device(musb->xceiv->dev); | |
1853 | #endif | |
1854 | ||
550a7375 FB |
1855 | musb_writeb(musb->mregs, MUSB_DEVCTL, 0); |
1856 | musb_platform_exit(musb); | |
1857 | musb_writeb(musb->mregs, MUSB_DEVCTL, 0); | |
1858 | ||
1859 | if (musb->clock) { | |
1860 | clk_disable(musb->clock); | |
1861 | clk_put(musb->clock); | |
1862 | } | |
1863 | ||
550a7375 FB |
1864 | #ifdef CONFIG_USB_MUSB_HDRC_HCD |
1865 | usb_put_hcd(musb_to_hcd(musb)); | |
1866 | #else | |
1867 | kfree(musb); | |
1868 | #endif | |
1869 | } | |
1870 | ||
1871 | /* | |
1872 | * Perform generic per-controller initialization. | |
1873 | * | |
1874 | * @pDevice: the controller (already clocked, etc) | |
1875 | * @nIrq: irq | |
1876 | * @mregs: virtual address of controller registers, | |
1877 | * not yet corrected for platform-specific offsets | |
1878 | */ | |
1879 | static int __init | |
1880 | musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl) | |
1881 | { | |
1882 | int status; | |
1883 | struct musb *musb; | |
1884 | struct musb_hdrc_platform_data *plat = dev->platform_data; | |
1885 | ||
1886 | /* The driver might handle more features than the board; OK. | |
1887 | * Fail when the board needs a feature that's not enabled. | |
1888 | */ | |
1889 | if (!plat) { | |
1890 | dev_dbg(dev, "no platform_data?\n"); | |
1891 | return -ENODEV; | |
1892 | } | |
1893 | switch (plat->mode) { | |
1894 | case MUSB_HOST: | |
1895 | #ifdef CONFIG_USB_MUSB_HDRC_HCD | |
1896 | break; | |
1897 | #else | |
1898 | goto bad_config; | |
1899 | #endif | |
1900 | case MUSB_PERIPHERAL: | |
1901 | #ifdef CONFIG_USB_GADGET_MUSB_HDRC | |
1902 | break; | |
1903 | #else | |
1904 | goto bad_config; | |
1905 | #endif | |
1906 | case MUSB_OTG: | |
1907 | #ifdef CONFIG_USB_MUSB_OTG | |
1908 | break; | |
1909 | #else | |
1910 | bad_config: | |
1911 | #endif | |
1912 | default: | |
1913 | dev_err(dev, "incompatible Kconfig role setting\n"); | |
1914 | return -EINVAL; | |
1915 | } | |
1916 | ||
1917 | /* allocate */ | |
ca6d1b13 | 1918 | musb = allocate_instance(dev, plat->config, ctrl); |
550a7375 FB |
1919 | if (!musb) |
1920 | return -ENOMEM; | |
1921 | ||
1922 | spin_lock_init(&musb->lock); | |
1923 | musb->board_mode = plat->mode; | |
1924 | musb->board_set_power = plat->set_power; | |
1925 | musb->set_clock = plat->set_clock; | |
1926 | musb->min_power = plat->min_power; | |
1927 | ||
1928 | /* Clock usage is chip-specific ... functional clock (DaVinci, | |
1929 | * OMAP2430), or PHY ref (some TUSB6010 boards). All this core | |
1930 | * code does is make sure a clock handle is available; platform | |
1931 | * code manages it during start/stop and suspend/resume. | |
1932 | */ | |
1933 | if (plat->clock) { | |
1934 | musb->clock = clk_get(dev, plat->clock); | |
1935 | if (IS_ERR(musb->clock)) { | |
1936 | status = PTR_ERR(musb->clock); | |
1937 | musb->clock = NULL; | |
1938 | goto fail; | |
1939 | } | |
1940 | } | |
1941 | ||
84e250ff DB |
1942 | /* The musb_platform_init() call: |
1943 | * - adjusts musb->mregs and musb->isr if needed, | |
1944 | * - may initialize an integrated tranceiver | |
1945 | * - initializes musb->xceiv, usually by otg_get_transceiver() | |
1946 | * - activates clocks. | |
1947 | * - stops powering VBUS | |
1948 | * - assigns musb->board_set_vbus if host mode is enabled | |
1949 | * | |
1950 | * There are various transciever configurations. Blackfin, | |
1951 | * DaVinci, TUSB60x0, and others integrate them. OMAP3 uses | |
1952 | * external/discrete ones in various flavors (twl4030 family, | |
1953 | * isp1504, non-OTG, etc) mostly hooking up through ULPI. | |
550a7375 FB |
1954 | */ |
1955 | musb->isr = generic_interrupt; | |
1956 | status = musb_platform_init(musb); | |
1957 | ||
1958 | if (status < 0) | |
1959 | goto fail; | |
1960 | if (!musb->isr) { | |
1961 | status = -ENODEV; | |
1962 | goto fail2; | |
1963 | } | |
1964 | ||
1965 | #ifndef CONFIG_MUSB_PIO_ONLY | |
1966 | if (use_dma && dev->dma_mask) { | |
1967 | struct dma_controller *c; | |
1968 | ||
1969 | c = dma_controller_create(musb, musb->mregs); | |
1970 | musb->dma_controller = c; | |
1971 | if (c) | |
1972 | (void) c->start(c); | |
1973 | } | |
1974 | #endif | |
1975 | /* ideally this would be abstracted in platform setup */ | |
1976 | if (!is_dma_capable() || !musb->dma_controller) | |
1977 | dev->dma_mask = NULL; | |
1978 | ||
1979 | /* be sure interrupts are disabled before connecting ISR */ | |
1980 | musb_platform_disable(musb); | |
1981 | musb_generic_disable(musb); | |
1982 | ||
1983 | /* setup musb parts of the core (especially endpoints) */ | |
ca6d1b13 | 1984 | status = musb_core_init(plat->config->multipoint |
550a7375 FB |
1985 | ? MUSB_CONTROLLER_MHDRC |
1986 | : MUSB_CONTROLLER_HDRC, musb); | |
1987 | if (status < 0) | |
1988 | goto fail2; | |
1989 | ||
3a9f5bd8 | 1990 | #ifdef CONFIG_USB_MUSB_OTG |
f7f9d63e DB |
1991 | setup_timer(&musb->otg_timer, musb_otg_timer_func, (unsigned long) musb); |
1992 | #endif | |
1993 | ||
550a7375 FB |
1994 | /* Init IRQ workqueue before request_irq */ |
1995 | INIT_WORK(&musb->irq_work, musb_irq_work); | |
1996 | ||
1997 | /* attach to the IRQ */ | |
427c4f33 | 1998 | if (request_irq(nIrq, musb->isr, 0, dev_name(dev), musb)) { |
550a7375 FB |
1999 | dev_err(dev, "request_irq %d failed!\n", nIrq); |
2000 | status = -ENODEV; | |
2001 | goto fail2; | |
2002 | } | |
2003 | musb->nIrq = nIrq; | |
2004 | /* FIXME this handles wakeup irqs wrong */ | |
c48a5155 FB |
2005 | if (enable_irq_wake(nIrq) == 0) { |
2006 | musb->irq_wake = 1; | |
550a7375 | 2007 | device_init_wakeup(dev, 1); |
c48a5155 FB |
2008 | } else { |
2009 | musb->irq_wake = 0; | |
2010 | } | |
550a7375 FB |
2011 | |
2012 | pr_info("%s: USB %s mode controller at %p using %s, IRQ %d\n", | |
2013 | musb_driver_name, | |
2014 | ({char *s; | |
2015 | switch (musb->board_mode) { | |
2016 | case MUSB_HOST: s = "Host"; break; | |
2017 | case MUSB_PERIPHERAL: s = "Peripheral"; break; | |
2018 | default: s = "OTG"; break; | |
2019 | }; s; }), | |
2020 | ctrl, | |
2021 | (is_dma_capable() && musb->dma_controller) | |
2022 | ? "DMA" : "PIO", | |
2023 | musb->nIrq); | |
2024 | ||
84e250ff DB |
2025 | /* host side needs more setup */ |
2026 | if (is_host_enabled(musb)) { | |
550a7375 FB |
2027 | struct usb_hcd *hcd = musb_to_hcd(musb); |
2028 | ||
84e250ff DB |
2029 | otg_set_host(musb->xceiv, &hcd->self); |
2030 | ||
2031 | if (is_otg_enabled(musb)) | |
550a7375 | 2032 | hcd->self.otg_port = 1; |
84e250ff | 2033 | musb->xceiv->host = &hcd->self; |
550a7375 FB |
2034 | hcd->power_budget = 2 * (plat->power ? : 250); |
2035 | } | |
550a7375 FB |
2036 | |
2037 | /* For the host-only role, we can activate right away. | |
2038 | * (We expect the ID pin to be forcibly grounded!!) | |
2039 | * Otherwise, wait till the gadget driver hooks up. | |
2040 | */ | |
2041 | if (!is_otg_enabled(musb) && is_host_enabled(musb)) { | |
2042 | MUSB_HST_MODE(musb); | |
84e250ff DB |
2043 | musb->xceiv->default_a = 1; |
2044 | musb->xceiv->state = OTG_STATE_A_IDLE; | |
550a7375 FB |
2045 | |
2046 | status = usb_add_hcd(musb_to_hcd(musb), -1, 0); | |
746cdd0b FB |
2047 | if (status) |
2048 | goto fail; | |
550a7375 FB |
2049 | |
2050 | DBG(1, "%s mode, status %d, devctl %02x %c\n", | |
2051 | "HOST", status, | |
2052 | musb_readb(musb->mregs, MUSB_DEVCTL), | |
2053 | (musb_readb(musb->mregs, MUSB_DEVCTL) | |
2054 | & MUSB_DEVCTL_BDEVICE | |
2055 | ? 'B' : 'A')); | |
2056 | ||
2057 | } else /* peripheral is enabled */ { | |
2058 | MUSB_DEV_MODE(musb); | |
84e250ff DB |
2059 | musb->xceiv->default_a = 0; |
2060 | musb->xceiv->state = OTG_STATE_B_IDLE; | |
550a7375 FB |
2061 | |
2062 | status = musb_gadget_setup(musb); | |
746cdd0b FB |
2063 | if (status) |
2064 | goto fail; | |
550a7375 FB |
2065 | |
2066 | DBG(1, "%s mode, status %d, dev%02x\n", | |
2067 | is_otg_enabled(musb) ? "OTG" : "PERIPHERAL", | |
2068 | status, | |
2069 | musb_readb(musb->mregs, MUSB_DEVCTL)); | |
2070 | ||
2071 | } | |
2072 | ||
550a7375 FB |
2073 | #ifdef CONFIG_SYSFS |
2074 | status = device_create_file(dev, &dev_attr_mode); | |
2075 | status = device_create_file(dev, &dev_attr_vbus); | |
2076 | #ifdef CONFIG_USB_GADGET_MUSB_HDRC | |
2077 | status = device_create_file(dev, &dev_attr_srp); | |
2078 | #endif /* CONFIG_USB_GADGET_MUSB_HDRC */ | |
2079 | status = 0; | |
2080 | #endif | |
28c2c51c FB |
2081 | if (status) |
2082 | goto fail2; | |
550a7375 | 2083 | |
28c2c51c | 2084 | return 0; |
550a7375 FB |
2085 | |
2086 | fail2: | |
28c2c51c FB |
2087 | #ifdef CONFIG_SYSFS |
2088 | device_remove_file(musb->controller, &dev_attr_mode); | |
2089 | device_remove_file(musb->controller, &dev_attr_vbus); | |
e7479512 | 2090 | #ifdef CONFIG_USB_GADGET_MUSB_HDRC |
28c2c51c FB |
2091 | device_remove_file(musb->controller, &dev_attr_srp); |
2092 | #endif | |
2093 | #endif | |
550a7375 | 2094 | musb_platform_exit(musb); |
28c2c51c FB |
2095 | fail: |
2096 | dev_err(musb->controller, | |
2097 | "musb_init_controller failed with status %d\n", status); | |
2098 | ||
2099 | if (musb->clock) | |
2100 | clk_put(musb->clock); | |
2101 | device_init_wakeup(dev, 0); | |
2102 | musb_free(musb); | |
2103 | ||
2104 | return status; | |
2105 | ||
550a7375 FB |
2106 | } |
2107 | ||
2108 | /*-------------------------------------------------------------------------*/ | |
2109 | ||
2110 | /* all implementations (PCI bridge to FPGA, VLYNQ, etc) should just | |
2111 | * bridge to a platform device; this driver then suffices. | |
2112 | */ | |
2113 | ||
2114 | #ifndef CONFIG_MUSB_PIO_ONLY | |
2115 | static u64 *orig_dma_mask; | |
2116 | #endif | |
2117 | ||
2118 | static int __init musb_probe(struct platform_device *pdev) | |
2119 | { | |
2120 | struct device *dev = &pdev->dev; | |
2121 | int irq = platform_get_irq(pdev, 0); | |
2122 | struct resource *iomem; | |
2123 | void __iomem *base; | |
2124 | ||
2125 | iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
2126 | if (!iomem || irq == 0) | |
2127 | return -ENODEV; | |
2128 | ||
2129 | base = ioremap(iomem->start, iomem->end - iomem->start + 1); | |
2130 | if (!base) { | |
2131 | dev_err(dev, "ioremap failed\n"); | |
2132 | return -ENOMEM; | |
2133 | } | |
2134 | ||
2135 | #ifndef CONFIG_MUSB_PIO_ONLY | |
2136 | /* clobbered by use_dma=n */ | |
2137 | orig_dma_mask = dev->dma_mask; | |
2138 | #endif | |
2139 | return musb_init_controller(dev, irq, base); | |
2140 | } | |
2141 | ||
e3060b17 | 2142 | static int __exit musb_remove(struct platform_device *pdev) |
550a7375 FB |
2143 | { |
2144 | struct musb *musb = dev_to_musb(&pdev->dev); | |
2145 | void __iomem *ctrl_base = musb->ctrl_base; | |
2146 | ||
2147 | /* this gets called on rmmod. | |
2148 | * - Host mode: host may still be active | |
2149 | * - Peripheral mode: peripheral is deactivated (or never-activated) | |
2150 | * - OTG mode: both roles are deactivated (or never-activated) | |
2151 | */ | |
2152 | musb_shutdown(pdev); | |
550a7375 FB |
2153 | #ifdef CONFIG_USB_MUSB_HDRC_HCD |
2154 | if (musb->board_mode == MUSB_HOST) | |
2155 | usb_remove_hcd(musb_to_hcd(musb)); | |
2156 | #endif | |
2157 | musb_free(musb); | |
2158 | iounmap(ctrl_base); | |
2159 | device_init_wakeup(&pdev->dev, 0); | |
2160 | #ifndef CONFIG_MUSB_PIO_ONLY | |
2161 | pdev->dev.dma_mask = orig_dma_mask; | |
2162 | #endif | |
2163 | return 0; | |
2164 | } | |
2165 | ||
2166 | #ifdef CONFIG_PM | |
2167 | ||
48fea965 | 2168 | static int musb_suspend(struct device *dev) |
550a7375 | 2169 | { |
48fea965 | 2170 | struct platform_device *pdev = to_platform_device(dev); |
550a7375 FB |
2171 | unsigned long flags; |
2172 | struct musb *musb = dev_to_musb(&pdev->dev); | |
2173 | ||
2174 | if (!musb->clock) | |
2175 | return 0; | |
2176 | ||
2177 | spin_lock_irqsave(&musb->lock, flags); | |
2178 | ||
2179 | if (is_peripheral_active(musb)) { | |
2180 | /* FIXME force disconnect unless we know USB will wake | |
2181 | * the system up quickly enough to respond ... | |
2182 | */ | |
2183 | } else if (is_host_active(musb)) { | |
2184 | /* we know all the children are suspended; sometimes | |
2185 | * they will even be wakeup-enabled. | |
2186 | */ | |
2187 | } | |
2188 | ||
2189 | if (musb->set_clock) | |
2190 | musb->set_clock(musb->clock, 0); | |
2191 | else | |
2192 | clk_disable(musb->clock); | |
2193 | spin_unlock_irqrestore(&musb->lock, flags); | |
2194 | return 0; | |
2195 | } | |
2196 | ||
48fea965 | 2197 | static int musb_resume_noirq(struct device *dev) |
550a7375 | 2198 | { |
48fea965 | 2199 | struct platform_device *pdev = to_platform_device(dev); |
550a7375 FB |
2200 | struct musb *musb = dev_to_musb(&pdev->dev); |
2201 | ||
2202 | if (!musb->clock) | |
2203 | return 0; | |
2204 | ||
550a7375 FB |
2205 | if (musb->set_clock) |
2206 | musb->set_clock(musb->clock, 1); | |
2207 | else | |
2208 | clk_enable(musb->clock); | |
2209 | ||
2210 | /* for static cmos like DaVinci, register values were preserved | |
0ec8fd70 KK |
2211 | * unless for some reason the whole soc powered down or the USB |
2212 | * module got reset through the PSC (vs just being disabled). | |
550a7375 | 2213 | */ |
550a7375 FB |
2214 | return 0; |
2215 | } | |
2216 | ||
47145210 | 2217 | static const struct dev_pm_ops musb_dev_pm_ops = { |
48fea965 MD |
2218 | .suspend = musb_suspend, |
2219 | .resume_noirq = musb_resume_noirq, | |
2220 | }; | |
2221 | ||
2222 | #define MUSB_DEV_PM_OPS (&musb_dev_pm_ops) | |
550a7375 | 2223 | #else |
48fea965 | 2224 | #define MUSB_DEV_PM_OPS NULL |
550a7375 FB |
2225 | #endif |
2226 | ||
2227 | static struct platform_driver musb_driver = { | |
2228 | .driver = { | |
2229 | .name = (char *)musb_driver_name, | |
2230 | .bus = &platform_bus_type, | |
2231 | .owner = THIS_MODULE, | |
48fea965 | 2232 | .pm = MUSB_DEV_PM_OPS, |
550a7375 | 2233 | }, |
e3060b17 | 2234 | .remove = __exit_p(musb_remove), |
550a7375 | 2235 | .shutdown = musb_shutdown, |
550a7375 FB |
2236 | }; |
2237 | ||
2238 | /*-------------------------------------------------------------------------*/ | |
2239 | ||
2240 | static int __init musb_init(void) | |
2241 | { | |
2242 | #ifdef CONFIG_USB_MUSB_HDRC_HCD | |
2243 | if (usb_disabled()) | |
2244 | return 0; | |
2245 | #endif | |
2246 | ||
2247 | pr_info("%s: version " MUSB_VERSION ", " | |
2248 | #ifdef CONFIG_MUSB_PIO_ONLY | |
2249 | "pio" | |
2250 | #elif defined(CONFIG_USB_TI_CPPI_DMA) | |
2251 | "cppi-dma" | |
2252 | #elif defined(CONFIG_USB_INVENTRA_DMA) | |
2253 | "musb-dma" | |
2254 | #elif defined(CONFIG_USB_TUSB_OMAP_DMA) | |
2255 | "tusb-omap-dma" | |
2256 | #else | |
2257 | "?dma?" | |
2258 | #endif | |
2259 | ", " | |
2260 | #ifdef CONFIG_USB_MUSB_OTG | |
2261 | "otg (peripheral+host)" | |
2262 | #elif defined(CONFIG_USB_GADGET_MUSB_HDRC) | |
2263 | "peripheral" | |
2264 | #elif defined(CONFIG_USB_MUSB_HDRC_HCD) | |
2265 | "host" | |
2266 | #endif | |
2267 | ", debug=%d\n", | |
b60c72ab | 2268 | musb_driver_name, musb_debug); |
550a7375 FB |
2269 | return platform_driver_probe(&musb_driver, musb_probe); |
2270 | } | |
2271 | ||
34f32c97 DB |
2272 | /* make us init after usbcore and i2c (transceivers, regulators, etc) |
2273 | * and before usb gadget and host-side drivers start to register | |
550a7375 | 2274 | */ |
34f32c97 | 2275 | fs_initcall(musb_init); |
550a7375 FB |
2276 | |
2277 | static void __exit musb_cleanup(void) | |
2278 | { | |
2279 | platform_driver_unregister(&musb_driver); | |
2280 | } | |
2281 | module_exit(musb_cleanup); |