Commit | Line | Data |
---|---|---|
39a269c0 AV |
1 | /* |
2 | * OHCI HCD (Host Controller Driver) for USB. | |
3 | * | |
4 | * Copyright (C) 2004 SAN People (Pty) Ltd. | |
5 | * Copyright (C) 2005 Thibaut VARENE <varenet@parisc-linux.org> | |
6 | * | |
0365ee0a | 7 | * AT91 Bus Glue |
39a269c0 AV |
8 | * |
9 | * Based on fragments of 2.4 driver by Rick Bronson. | |
10 | * Based on ohci-omap.c | |
11 | * | |
12 | * This file is licenced under the GPL. | |
13 | */ | |
14 | ||
15 | #include <linux/clk.h> | |
e3825b48 | 16 | #include <linux/dma-mapping.h> |
2419730f JCPV |
17 | #include <linux/of_platform.h> |
18 | #include <linux/of_gpio.h> | |
e3825b48 | 19 | #include <linux/platform_device.h> |
bcd2360c | 20 | #include <linux/platform_data/atmel.h> |
e3825b48 MG |
21 | #include <linux/io.h> |
22 | #include <linux/kernel.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/usb.h> | |
25 | #include <linux/usb/hcd.h> | |
39a269c0 | 26 | |
a09e64fb | 27 | #include <mach/hardware.h> |
4bde4a4c DB |
28 | #include <asm/gpio.h> |
29 | ||
a09e64fb | 30 | #include <mach/cpu.h> |
39a269c0 | 31 | |
e3825b48 MG |
32 | |
33 | #include "ohci.h" | |
39a269c0 | 34 | |
0ee6d1ee NF |
35 | #define valid_port(index) ((index) >= 0 && (index) < AT91_MAX_USBH_PORTS) |
36 | #define at91_for_each_port(index) \ | |
37 | for ((index) = 0; (index) < AT91_MAX_USBH_PORTS; (index)++) | |
38 | ||
6b0a1cf7 BB |
39 | /* interface, function and usb clocks; sometimes also an AHB clock */ |
40 | static struct clk *iclk, *fclk, *uclk, *hclk; | |
e3825b48 MG |
41 | /* interface and function clocks; sometimes also an AHB clock */ |
42 | ||
43 | #define DRIVER_DESC "OHCI Atmel driver" | |
44 | ||
45 | static const char hcd_name[] = "ohci-atmel"; | |
46 | ||
47 | static struct hc_driver __read_mostly ohci_at91_hc_driver; | |
0365ee0a | 48 | static int clocked; |
e3825b48 MG |
49 | static int (*orig_ohci_hub_control)(struct usb_hcd *hcd, u16 typeReq, |
50 | u16 wValue, u16 wIndex, char *buf, u16 wLength); | |
51 | static int (*orig_ohci_hub_status_data)(struct usb_hcd *hcd, char *buf); | |
39a269c0 AV |
52 | |
53 | extern int usb_disabled(void); | |
54 | ||
55 | /*-------------------------------------------------------------------------*/ | |
56 | ||
ed077bb7 AV |
57 | static void at91_start_clock(void) |
58 | { | |
6b0a1cf7 BB |
59 | if (IS_ENABLED(CONFIG_COMMON_CLK)) { |
60 | clk_set_rate(uclk, 48000000); | |
61 | clk_prepare_enable(uclk); | |
62 | } | |
8e82d8d9 BB |
63 | clk_prepare_enable(hclk); |
64 | clk_prepare_enable(iclk); | |
65 | clk_prepare_enable(fclk); | |
ed077bb7 AV |
66 | clocked = 1; |
67 | } | |
68 | ||
69 | static void at91_stop_clock(void) | |
70 | { | |
8e82d8d9 BB |
71 | clk_disable_unprepare(fclk); |
72 | clk_disable_unprepare(iclk); | |
73 | clk_disable_unprepare(hclk); | |
6b0a1cf7 BB |
74 | if (IS_ENABLED(CONFIG_COMMON_CLK)) |
75 | clk_disable_unprepare(uclk); | |
ed077bb7 AV |
76 | clocked = 0; |
77 | } | |
78 | ||
39a269c0 AV |
79 | static void at91_start_hc(struct platform_device *pdev) |
80 | { | |
81 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
82 | struct ohci_regs __iomem *regs = hcd->regs; | |
83 | ||
0365ee0a | 84 | dev_dbg(&pdev->dev, "start\n"); |
39a269c0 AV |
85 | |
86 | /* | |
87 | * Start the USB clocks. | |
88 | */ | |
ed077bb7 | 89 | at91_start_clock(); |
39a269c0 AV |
90 | |
91 | /* | |
92 | * The USB host controller must remain in reset. | |
93 | */ | |
94 | writel(0, ®s->control); | |
95 | } | |
96 | ||
97 | static void at91_stop_hc(struct platform_device *pdev) | |
98 | { | |
99 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
100 | struct ohci_regs __iomem *regs = hcd->regs; | |
101 | ||
0365ee0a | 102 | dev_dbg(&pdev->dev, "stop\n"); |
39a269c0 AV |
103 | |
104 | /* | |
105 | * Put the USB host controller into reset. | |
106 | */ | |
107 | writel(0, ®s->control); | |
108 | ||
109 | /* | |
110 | * Stop the USB clocks. | |
111 | */ | |
ed077bb7 | 112 | at91_stop_clock(); |
39a269c0 AV |
113 | } |
114 | ||
115 | ||
116 | /*-------------------------------------------------------------------------*/ | |
117 | ||
fb4e98ab | 118 | static void usb_hcd_at91_remove (struct usb_hcd *, struct platform_device *); |
39a269c0 AV |
119 | |
120 | /* configure so an HC device and id are always provided */ | |
121 | /* always called with process context; sleeping is OK */ | |
122 | ||
123 | ||
124 | /** | |
0365ee0a | 125 | * usb_hcd_at91_probe - initialize AT91-based HCDs |
39a269c0 AV |
126 | * Context: !in_interrupt() |
127 | * | |
128 | * Allocates basic resources for this USB host controller, and | |
129 | * then invokes the start() method for the HCD associated with it | |
130 | * through the hotplug entry's driver_data. | |
39a269c0 | 131 | */ |
41ac7b3a | 132 | static int usb_hcd_at91_probe(const struct hc_driver *driver, |
0365ee0a | 133 | struct platform_device *pdev) |
39a269c0 | 134 | { |
e3825b48 MG |
135 | struct at91_usbh_data *board; |
136 | struct ohci_hcd *ohci; | |
39a269c0 AV |
137 | int retval; |
138 | struct usb_hcd *hcd = NULL; | |
139 | ||
140 | if (pdev->num_resources != 2) { | |
141 | pr_debug("hcd probe: invalid num_resources"); | |
142 | return -ENODEV; | |
143 | } | |
144 | ||
0365ee0a DB |
145 | if ((pdev->resource[0].flags != IORESOURCE_MEM) |
146 | || (pdev->resource[1].flags != IORESOURCE_IRQ)) { | |
39a269c0 AV |
147 | pr_debug("hcd probe: invalid resource type\n"); |
148 | return -ENODEV; | |
149 | } | |
150 | ||
0365ee0a | 151 | hcd = usb_create_hcd(driver, &pdev->dev, "at91"); |
39a269c0 AV |
152 | if (!hcd) |
153 | return -ENOMEM; | |
154 | hcd->rsrc_start = pdev->resource[0].start; | |
7a82f612 | 155 | hcd->rsrc_len = resource_size(&pdev->resource[0]); |
39a269c0 AV |
156 | |
157 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { | |
158 | pr_debug("request_mem_region failed\n"); | |
159 | retval = -EBUSY; | |
160 | goto err1; | |
161 | } | |
162 | ||
163 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); | |
164 | if (!hcd->regs) { | |
165 | pr_debug("ioremap failed\n"); | |
166 | retval = -EIO; | |
167 | goto err2; | |
168 | } | |
169 | ||
170 | iclk = clk_get(&pdev->dev, "ohci_clk"); | |
6813463c JCPV |
171 | if (IS_ERR(iclk)) { |
172 | dev_err(&pdev->dev, "failed to get ohci_clk\n"); | |
173 | retval = PTR_ERR(iclk); | |
174 | goto err3; | |
175 | } | |
39a269c0 | 176 | fclk = clk_get(&pdev->dev, "uhpck"); |
6813463c JCPV |
177 | if (IS_ERR(fclk)) { |
178 | dev_err(&pdev->dev, "failed to get uhpck\n"); | |
179 | retval = PTR_ERR(fclk); | |
180 | goto err4; | |
181 | } | |
0af4316b | 182 | hclk = clk_get(&pdev->dev, "hclk"); |
6813463c JCPV |
183 | if (IS_ERR(hclk)) { |
184 | dev_err(&pdev->dev, "failed to get hclk\n"); | |
185 | retval = PTR_ERR(hclk); | |
186 | goto err5; | |
187 | } | |
6b0a1cf7 BB |
188 | if (IS_ENABLED(CONFIG_COMMON_CLK)) { |
189 | uclk = clk_get(&pdev->dev, "usb_clk"); | |
190 | if (IS_ERR(uclk)) { | |
191 | dev_err(&pdev->dev, "failed to get uclk\n"); | |
192 | retval = PTR_ERR(uclk); | |
193 | goto err6; | |
194 | } | |
195 | } | |
39a269c0 | 196 | |
e3825b48 MG |
197 | board = hcd->self.controller->platform_data; |
198 | ohci = hcd_to_ohci(hcd); | |
199 | ohci->num_ports = board->ports; | |
39a269c0 | 200 | at91_start_hc(pdev); |
39a269c0 | 201 | |
2f2cac3c | 202 | retval = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_SHARED); |
39a269c0 AV |
203 | if (retval == 0) |
204 | return retval; | |
205 | ||
206 | /* Error handling */ | |
207 | at91_stop_hc(pdev); | |
208 | ||
6b0a1cf7 BB |
209 | if (IS_ENABLED(CONFIG_COMMON_CLK)) |
210 | clk_put(uclk); | |
211 | err6: | |
0af4316b | 212 | clk_put(hclk); |
6813463c | 213 | err5: |
39a269c0 | 214 | clk_put(fclk); |
6813463c | 215 | err4: |
39a269c0 AV |
216 | clk_put(iclk); |
217 | ||
6813463c | 218 | err3: |
39a269c0 AV |
219 | iounmap(hcd->regs); |
220 | ||
221 | err2: | |
222 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
223 | ||
224 | err1: | |
225 | usb_put_hcd(hcd); | |
226 | return retval; | |
227 | } | |
228 | ||
229 | ||
39a269c0 AV |
230 | /* may be called with controller, bus, and devices active */ |
231 | ||
232 | /** | |
0365ee0a | 233 | * usb_hcd_at91_remove - shutdown processing for AT91-based HCDs |
39a269c0 AV |
234 | * @dev: USB Host Controller being removed |
235 | * Context: !in_interrupt() | |
236 | * | |
237 | * Reverses the effect of usb_hcd_at91_probe(), first invoking | |
238 | * the HCD's stop() method. It is always called from a thread | |
0365ee0a | 239 | * context, "rmmod" or something similar. |
39a269c0 AV |
240 | * |
241 | */ | |
fb4e98ab | 242 | static void usb_hcd_at91_remove(struct usb_hcd *hcd, |
0365ee0a | 243 | struct platform_device *pdev) |
39a269c0 AV |
244 | { |
245 | usb_remove_hcd(hcd); | |
246 | at91_stop_hc(pdev); | |
247 | iounmap(hcd->regs); | |
68ba61b8 | 248 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
421b4bf5 | 249 | usb_put_hcd(hcd); |
39a269c0 | 250 | |
6b0a1cf7 BB |
251 | if (IS_ENABLED(CONFIG_COMMON_CLK)) |
252 | clk_put(uclk); | |
0af4316b | 253 | clk_put(hclk); |
68ba61b8 DB |
254 | clk_put(fclk); |
255 | clk_put(iclk); | |
ed077bb7 | 256 | fclk = iclk = hclk = NULL; |
39a269c0 AV |
257 | } |
258 | ||
259 | /*-------------------------------------------------------------------------*/ | |
aa6e52a3 TP |
260 | static void ohci_at91_usb_set_power(struct at91_usbh_data *pdata, int port, int enable) |
261 | { | |
0ee6d1ee | 262 | if (!valid_port(port)) |
aa6e52a3 TP |
263 | return; |
264 | ||
8a7a49d1 | 265 | if (!gpio_is_valid(pdata->vbus_pin[port])) |
770f0baa JCPV |
266 | return; |
267 | ||
8134ff55 | 268 | gpio_set_value(pdata->vbus_pin[port], |
1e7caf8b | 269 | pdata->vbus_pin_active_low[port] ^ enable); |
aa6e52a3 TP |
270 | } |
271 | ||
272 | static int ohci_at91_usb_get_power(struct at91_usbh_data *pdata, int port) | |
273 | { | |
0ee6d1ee | 274 | if (!valid_port(port)) |
aa6e52a3 TP |
275 | return -EINVAL; |
276 | ||
8a7a49d1 | 277 | if (!gpio_is_valid(pdata->vbus_pin[port])) |
770f0baa JCPV |
278 | return -EINVAL; |
279 | ||
8134ff55 | 280 | return gpio_get_value(pdata->vbus_pin[port]) ^ |
1e7caf8b | 281 | pdata->vbus_pin_active_low[port]; |
aa6e52a3 TP |
282 | } |
283 | ||
284 | /* | |
285 | * Update the status data from the hub with the over-current indicator change. | |
286 | */ | |
287 | static int ohci_at91_hub_status_data(struct usb_hcd *hcd, char *buf) | |
288 | { | |
e3825b48 MG |
289 | struct at91_usbh_data *pdata = hcd->self.controller->platform_data; |
290 | int length = orig_ohci_hub_status_data(hcd, buf); | |
aa6e52a3 TP |
291 | int port; |
292 | ||
0ee6d1ee | 293 | at91_for_each_port(port) { |
aa6e52a3 | 294 | if (pdata->overcurrent_changed[port]) { |
0ee6d1ee | 295 | if (!length) |
aa6e52a3 TP |
296 | length = 1; |
297 | buf[0] |= 1 << (port + 1); | |
298 | } | |
299 | } | |
300 | ||
301 | return length; | |
302 | } | |
303 | ||
304 | /* | |
305 | * Look at the control requests to the root hub and see if we need to override. | |
306 | */ | |
307 | static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, | |
308 | u16 wIndex, char *buf, u16 wLength) | |
309 | { | |
d4f09e28 | 310 | struct at91_usbh_data *pdata = dev_get_platdata(hcd->self.controller); |
aa6e52a3 TP |
311 | struct usb_hub_descriptor *desc; |
312 | int ret = -EINVAL; | |
313 | u32 *data = (u32 *)buf; | |
314 | ||
315 | dev_dbg(hcd->self.controller, | |
316 | "ohci_at91_hub_control(%p,0x%04x,0x%04x,0x%04x,%p,%04x)\n", | |
317 | hcd, typeReq, wValue, wIndex, buf, wLength); | |
318 | ||
0ee6d1ee NF |
319 | wIndex--; |
320 | ||
aa6e52a3 TP |
321 | switch (typeReq) { |
322 | case SetPortFeature: | |
323 | if (wValue == USB_PORT_FEAT_POWER) { | |
324 | dev_dbg(hcd->self.controller, "SetPortFeat: POWER\n"); | |
0ee6d1ee NF |
325 | if (valid_port(wIndex)) { |
326 | ohci_at91_usb_set_power(pdata, wIndex, 1); | |
327 | ret = 0; | |
328 | } | |
329 | ||
aa6e52a3 TP |
330 | goto out; |
331 | } | |
332 | break; | |
333 | ||
334 | case ClearPortFeature: | |
335 | switch (wValue) { | |
336 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
337 | dev_dbg(hcd->self.controller, | |
338 | "ClearPortFeature: C_OVER_CURRENT\n"); | |
339 | ||
0ee6d1ee NF |
340 | if (valid_port(wIndex)) { |
341 | pdata->overcurrent_changed[wIndex] = 0; | |
342 | pdata->overcurrent_status[wIndex] = 0; | |
aa6e52a3 TP |
343 | } |
344 | ||
345 | goto out; | |
346 | ||
347 | case USB_PORT_FEAT_OVER_CURRENT: | |
348 | dev_dbg(hcd->self.controller, | |
349 | "ClearPortFeature: OVER_CURRENT\n"); | |
350 | ||
0ee6d1ee NF |
351 | if (valid_port(wIndex)) |
352 | pdata->overcurrent_status[wIndex] = 0; | |
aa6e52a3 TP |
353 | |
354 | goto out; | |
355 | ||
356 | case USB_PORT_FEAT_POWER: | |
357 | dev_dbg(hcd->self.controller, | |
358 | "ClearPortFeature: POWER\n"); | |
359 | ||
0ee6d1ee NF |
360 | if (valid_port(wIndex)) { |
361 | ohci_at91_usb_set_power(pdata, wIndex, 0); | |
aa6e52a3 TP |
362 | return 0; |
363 | } | |
364 | } | |
365 | break; | |
366 | } | |
367 | ||
e3825b48 MG |
368 | ret = orig_ohci_hub_control(hcd, typeReq, wValue, wIndex + 1, |
369 | buf, wLength); | |
aa6e52a3 TP |
370 | if (ret) |
371 | goto out; | |
372 | ||
373 | switch (typeReq) { | |
374 | case GetHubDescriptor: | |
375 | ||
376 | /* update the hub's descriptor */ | |
377 | ||
378 | desc = (struct usb_hub_descriptor *)buf; | |
379 | ||
380 | dev_dbg(hcd->self.controller, "wHubCharacteristics 0x%04x\n", | |
381 | desc->wHubCharacteristics); | |
382 | ||
383 | /* remove the old configurations for power-switching, and | |
384 | * over-current protection, and insert our new configuration | |
385 | */ | |
386 | ||
387 | desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_LPSM); | |
388 | desc->wHubCharacteristics |= cpu_to_le16(0x0001); | |
389 | ||
390 | if (pdata->overcurrent_supported) { | |
391 | desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_OCPM); | |
392 | desc->wHubCharacteristics |= cpu_to_le16(0x0008|0x0001); | |
393 | } | |
394 | ||
395 | dev_dbg(hcd->self.controller, "wHubCharacteristics after 0x%04x\n", | |
396 | desc->wHubCharacteristics); | |
397 | ||
398 | return ret; | |
399 | ||
400 | case GetPortStatus: | |
401 | /* check port status */ | |
402 | ||
403 | dev_dbg(hcd->self.controller, "GetPortStatus(%d)\n", wIndex); | |
404 | ||
0ee6d1ee NF |
405 | if (valid_port(wIndex)) { |
406 | if (!ohci_at91_usb_get_power(pdata, wIndex)) | |
aa6e52a3 | 407 | *data &= ~cpu_to_le32(RH_PS_PPS); |
aa6e52a3 | 408 | |
0ee6d1ee | 409 | if (pdata->overcurrent_changed[wIndex]) |
aa6e52a3 | 410 | *data |= cpu_to_le32(RH_PS_OCIC); |
aa6e52a3 | 411 | |
0ee6d1ee | 412 | if (pdata->overcurrent_status[wIndex]) |
aa6e52a3 | 413 | *data |= cpu_to_le32(RH_PS_POCI); |
aa6e52a3 TP |
414 | } |
415 | } | |
416 | ||
417 | out: | |
418 | return ret; | |
419 | } | |
420 | ||
39a269c0 AV |
421 | /*-------------------------------------------------------------------------*/ |
422 | ||
aa6e52a3 TP |
423 | static irqreturn_t ohci_hcd_at91_overcurrent_irq(int irq, void *data) |
424 | { | |
425 | struct platform_device *pdev = data; | |
d4f09e28 | 426 | struct at91_usbh_data *pdata = dev_get_platdata(&pdev->dev); |
aa6e52a3 TP |
427 | int val, gpio, port; |
428 | ||
429 | /* From the GPIO notifying the over-current situation, find | |
430 | * out the corresponding port */ | |
0ee6d1ee | 431 | at91_for_each_port(port) { |
01bb6501 JE |
432 | if (gpio_is_valid(pdata->overcurrent_pin[port]) && |
433 | gpio_to_irq(pdata->overcurrent_pin[port]) == irq) { | |
e4499079 | 434 | gpio = pdata->overcurrent_pin[port]; |
aa6e52a3 | 435 | break; |
e4499079 | 436 | } |
aa6e52a3 TP |
437 | } |
438 | ||
0ee6d1ee | 439 | if (port == AT91_MAX_USBH_PORTS) { |
aa6e52a3 TP |
440 | dev_err(& pdev->dev, "overcurrent interrupt from unknown GPIO\n"); |
441 | return IRQ_HANDLED; | |
442 | } | |
443 | ||
444 | val = gpio_get_value(gpio); | |
445 | ||
446 | /* When notified of an over-current situation, disable power | |
447 | on the corresponding port, and mark this port in | |
448 | over-current. */ | |
0ee6d1ee | 449 | if (!val) { |
aa6e52a3 TP |
450 | ohci_at91_usb_set_power(pdata, port, 0); |
451 | pdata->overcurrent_status[port] = 1; | |
452 | pdata->overcurrent_changed[port] = 1; | |
453 | } | |
454 | ||
455 | dev_dbg(& pdev->dev, "overcurrent situation %s\n", | |
456 | val ? "exited" : "notified"); | |
457 | ||
458 | return IRQ_HANDLED; | |
459 | } | |
460 | ||
2419730f JCPV |
461 | #ifdef CONFIG_OF |
462 | static const struct of_device_id at91_ohci_dt_ids[] = { | |
463 | { .compatible = "atmel,at91rm9200-ohci" }, | |
464 | { /* sentinel */ } | |
465 | }; | |
466 | ||
467 | MODULE_DEVICE_TABLE(of, at91_ohci_dt_ids); | |
468 | ||
41ac7b3a | 469 | static int ohci_at91_of_init(struct platform_device *pdev) |
2419730f JCPV |
470 | { |
471 | struct device_node *np = pdev->dev.of_node; | |
aaf9f5fc | 472 | int i, gpio; |
2419730f JCPV |
473 | enum of_gpio_flags flags; |
474 | struct at91_usbh_data *pdata; | |
475 | u32 ports; | |
476 | ||
477 | if (!np) | |
478 | return 0; | |
479 | ||
480 | /* Right now device-tree probed devices don't get dma_mask set. | |
481 | * Since shared usb code relies on it, set it here for now. | |
482 | * Once we have dma capability bindings this can go away. | |
483 | */ | |
484 | if (!pdev->dev.dma_mask) | |
3b9561e9 SW |
485 | pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask; |
486 | if (!pdev->dev.coherent_dma_mask) | |
487 | pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); | |
2419730f JCPV |
488 | |
489 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); | |
490 | if (!pdata) | |
491 | return -ENOMEM; | |
492 | ||
493 | if (!of_property_read_u32(np, "num-ports", &ports)) | |
494 | pdata->ports = ports; | |
495 | ||
0ee6d1ee | 496 | at91_for_each_port(i) { |
2419730f JCPV |
497 | gpio = of_get_named_gpio_flags(np, "atmel,vbus-gpio", i, &flags); |
498 | pdata->vbus_pin[i] = gpio; | |
499 | if (!gpio_is_valid(gpio)) | |
500 | continue; | |
501 | pdata->vbus_pin_active_low[i] = flags & OF_GPIO_ACTIVE_LOW; | |
2419730f JCPV |
502 | } |
503 | ||
0ee6d1ee | 504 | at91_for_each_port(i) |
aaf9f5fc NF |
505 | pdata->overcurrent_pin[i] = |
506 | of_get_named_gpio_flags(np, "atmel,oc-gpio", i, &flags); | |
2419730f JCPV |
507 | |
508 | pdev->dev.platform_data = pdata; | |
509 | ||
510 | return 0; | |
511 | } | |
512 | #else | |
41ac7b3a | 513 | static int ohci_at91_of_init(struct platform_device *pdev) |
2419730f JCPV |
514 | { |
515 | return 0; | |
516 | } | |
517 | #endif | |
518 | ||
aa6e52a3 TP |
519 | /*-------------------------------------------------------------------------*/ |
520 | ||
41ac7b3a | 521 | static int ohci_hcd_at91_drv_probe(struct platform_device *pdev) |
39a269c0 | 522 | { |
2419730f | 523 | struct at91_usbh_data *pdata; |
4bde4a4c | 524 | int i; |
aaf9f5fc NF |
525 | int gpio; |
526 | int ret; | |
4bde4a4c | 527 | |
1887ab2b NF |
528 | ret = ohci_at91_of_init(pdev); |
529 | if (ret) | |
530 | return ret; | |
2419730f | 531 | |
d4f09e28 | 532 | pdata = dev_get_platdata(&pdev->dev); |
2419730f | 533 | |
4bde4a4c | 534 | if (pdata) { |
0ee6d1ee | 535 | at91_for_each_port(i) { |
6fffb77c NF |
536 | /* |
537 | * do not configure PIO if not in relation with | |
538 | * real USB port on board | |
539 | */ | |
540 | if (i >= pdata->ports) { | |
541 | pdata->vbus_pin[i] = -EINVAL; | |
542 | pdata->overcurrent_pin[i] = -EINVAL; | |
543 | break; | |
544 | } | |
545 | ||
8a7a49d1 | 546 | if (!gpio_is_valid(pdata->vbus_pin[i])) |
4bde4a4c | 547 | continue; |
aaf9f5fc NF |
548 | gpio = pdata->vbus_pin[i]; |
549 | ||
550 | ret = gpio_request(gpio, "ohci_vbus"); | |
551 | if (ret) { | |
552 | dev_err(&pdev->dev, | |
553 | "can't request vbus gpio %d\n", gpio); | |
554 | continue; | |
555 | } | |
556 | ret = gpio_direction_output(gpio, | |
557 | !pdata->vbus_pin_active_low[i]); | |
558 | if (ret) { | |
559 | dev_err(&pdev->dev, | |
560 | "can't put vbus gpio %d as output %d\n", | |
561 | gpio, !pdata->vbus_pin_active_low[i]); | |
562 | gpio_free(gpio); | |
563 | continue; | |
564 | } | |
565 | ||
aa6e52a3 TP |
566 | ohci_at91_usb_set_power(pdata, i, 1); |
567 | } | |
568 | ||
0ee6d1ee | 569 | at91_for_each_port(i) { |
8a7a49d1 | 570 | if (!gpio_is_valid(pdata->overcurrent_pin[i])) |
aa6e52a3 | 571 | continue; |
aaf9f5fc NF |
572 | gpio = pdata->overcurrent_pin[i]; |
573 | ||
574 | ret = gpio_request(gpio, "ohci_overcurrent"); | |
575 | if (ret) { | |
576 | dev_err(&pdev->dev, | |
577 | "can't request overcurrent gpio %d\n", | |
578 | gpio); | |
579 | continue; | |
580 | } | |
581 | ||
582 | ret = gpio_direction_input(gpio); | |
583 | if (ret) { | |
584 | dev_err(&pdev->dev, | |
585 | "can't configure overcurrent gpio %d as input\n", | |
586 | gpio); | |
587 | gpio_free(gpio); | |
588 | continue; | |
589 | } | |
aa6e52a3 | 590 | |
aaf9f5fc | 591 | ret = request_irq(gpio_to_irq(gpio), |
aa6e52a3 TP |
592 | ohci_hcd_at91_overcurrent_irq, |
593 | IRQF_SHARED, "ohci_overcurrent", pdev); | |
594 | if (ret) { | |
aaf9f5fc NF |
595 | gpio_free(gpio); |
596 | dev_err(&pdev->dev, | |
597 | "can't get gpio IRQ for overcurrent\n"); | |
aa6e52a3 | 598 | } |
4bde4a4c DB |
599 | } |
600 | } | |
601 | ||
0365ee0a DB |
602 | device_init_wakeup(&pdev->dev, 1); |
603 | return usb_hcd_at91_probe(&ohci_at91_hc_driver, pdev); | |
39a269c0 AV |
604 | } |
605 | ||
fb4e98ab | 606 | static int ohci_hcd_at91_drv_remove(struct platform_device *pdev) |
39a269c0 | 607 | { |
d4f09e28 | 608 | struct at91_usbh_data *pdata = dev_get_platdata(&pdev->dev); |
4bde4a4c DB |
609 | int i; |
610 | ||
611 | if (pdata) { | |
0ee6d1ee | 612 | at91_for_each_port(i) { |
8a7a49d1 | 613 | if (!gpio_is_valid(pdata->vbus_pin[i])) |
4bde4a4c | 614 | continue; |
aa6e52a3 | 615 | ohci_at91_usb_set_power(pdata, i, 0); |
4bde4a4c DB |
616 | gpio_free(pdata->vbus_pin[i]); |
617 | } | |
aa6e52a3 | 618 | |
0ee6d1ee | 619 | at91_for_each_port(i) { |
8a7a49d1 | 620 | if (!gpio_is_valid(pdata->overcurrent_pin[i])) |
aa6e52a3 TP |
621 | continue; |
622 | free_irq(gpio_to_irq(pdata->overcurrent_pin[i]), pdev); | |
623 | gpio_free(pdata->overcurrent_pin[i]); | |
624 | } | |
4bde4a4c DB |
625 | } |
626 | ||
0365ee0a | 627 | device_init_wakeup(&pdev->dev, 0); |
421b4bf5 PZ |
628 | usb_hcd_at91_remove(platform_get_drvdata(pdev), pdev); |
629 | return 0; | |
39a269c0 AV |
630 | } |
631 | ||
632 | #ifdef CONFIG_PM | |
39a269c0 | 633 | |
68ba61b8 | 634 | static int |
0365ee0a | 635 | ohci_hcd_at91_drv_suspend(struct platform_device *pdev, pm_message_t mesg) |
68ba61b8 | 636 | { |
0365ee0a DB |
637 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
638 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); | |
639 | ||
118cb990 | 640 | if (device_may_wakeup(&pdev->dev)) |
0365ee0a | 641 | enable_irq_wake(hcd->irq); |
0365ee0a DB |
642 | |
643 | /* | |
644 | * The integrated transceivers seem unable to notice disconnect, | |
645 | * reconnect, or wakeup without the 48 MHz clock active. so for | |
646 | * correctness, always discard connection state (using reset). | |
647 | * | |
648 | * REVISIT: some boards will be able to turn VBUS off... | |
649 | */ | |
650 | if (at91_suspend_entering_slow_clock()) { | |
e3825b48 MG |
651 | ohci->hc_control = ohci_readl(ohci, &ohci->regs->control); |
652 | ohci->hc_control &= OHCI_CTRL_RWC; | |
653 | ohci_writel(ohci, ohci->hc_control, &ohci->regs->control); | |
654 | ohci->rh_state = OHCI_RH_HALTED; | |
655 | ||
869aa98c PV |
656 | /* flush the writes */ |
657 | (void) ohci_readl (ohci, &ohci->regs->control); | |
ed077bb7 | 658 | at91_stop_clock(); |
0365ee0a | 659 | } |
39a269c0 | 660 | |
118cb990 | 661 | return 0; |
39a269c0 AV |
662 | } |
663 | ||
0365ee0a | 664 | static int ohci_hcd_at91_drv_resume(struct platform_device *pdev) |
39a269c0 | 665 | { |
6dde896e MP |
666 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
667 | ||
668 | if (device_may_wakeup(&pdev->dev)) | |
669 | disable_irq_wake(hcd->irq); | |
670 | ||
ed077bb7 AV |
671 | if (!clocked) |
672 | at91_start_clock(); | |
39a269c0 | 673 | |
cfa49b4b | 674 | ohci_resume(hcd, false); |
39a269c0 AV |
675 | return 0; |
676 | } | |
677 | #else | |
678 | #define ohci_hcd_at91_drv_suspend NULL | |
679 | #define ohci_hcd_at91_drv_resume NULL | |
680 | #endif | |
681 | ||
682 | static struct platform_driver ohci_hcd_at91_driver = { | |
683 | .probe = ohci_hcd_at91_drv_probe, | |
7690417d | 684 | .remove = ohci_hcd_at91_drv_remove, |
64a21d02 | 685 | .shutdown = usb_hcd_platform_shutdown, |
39a269c0 AV |
686 | .suspend = ohci_hcd_at91_drv_suspend, |
687 | .resume = ohci_hcd_at91_drv_resume, | |
688 | .driver = { | |
0365ee0a | 689 | .name = "at91_ohci", |
39a269c0 | 690 | .owner = THIS_MODULE, |
2419730f | 691 | .of_match_table = of_match_ptr(at91_ohci_dt_ids), |
39a269c0 AV |
692 | }, |
693 | }; | |
e3825b48 MG |
694 | |
695 | static int __init ohci_at91_init(void) | |
696 | { | |
697 | if (usb_disabled()) | |
698 | return -ENODEV; | |
699 | ||
700 | pr_info("%s: " DRIVER_DESC "\n", hcd_name); | |
701 | ohci_init_driver(&ohci_at91_hc_driver, NULL); | |
702 | ||
703 | /* | |
704 | * The Atmel HW has some unusual quirks, which require Atmel-specific | |
705 | * workarounds. We override certain hc_driver functions here to | |
706 | * achieve that. We explicitly do not enhance ohci_driver_overrides to | |
707 | * allow this more easily, since this is an unusual case, and we don't | |
708 | * want to encourage others to override these functions by making it | |
709 | * too easy. | |
710 | */ | |
711 | ||
712 | orig_ohci_hub_control = ohci_at91_hc_driver.hub_control; | |
713 | orig_ohci_hub_status_data = ohci_at91_hc_driver.hub_status_data; | |
714 | ||
715 | ohci_at91_hc_driver.hub_status_data = ohci_at91_hub_status_data; | |
716 | ohci_at91_hc_driver.hub_control = ohci_at91_hub_control; | |
717 | ||
718 | return platform_driver_register(&ohci_hcd_at91_driver); | |
719 | } | |
720 | module_init(ohci_at91_init); | |
721 | ||
722 | static void __exit ohci_at91_cleanup(void) | |
723 | { | |
724 | platform_driver_unregister(&ohci_hcd_at91_driver); | |
725 | } | |
726 | module_exit(ohci_at91_cleanup); | |
727 | ||
728 | MODULE_DESCRIPTION(DRIVER_DESC); | |
729 | MODULE_LICENSE("GPL"); | |
730 | MODULE_ALIAS("platform:at91_ohci"); |