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> | |
16 | #include <linux/platform_device.h> | |
2419730f JCPV |
17 | #include <linux/of_platform.h> |
18 | #include <linux/of_gpio.h> | |
39a269c0 | 19 | |
a09e64fb | 20 | #include <mach/hardware.h> |
4bde4a4c DB |
21 | #include <asm/gpio.h> |
22 | ||
a09e64fb RK |
23 | #include <mach/board.h> |
24 | #include <mach/cpu.h> | |
39a269c0 | 25 | |
0365ee0a DB |
26 | #ifndef CONFIG_ARCH_AT91 |
27 | #error "CONFIG_ARCH_AT91 must be defined." | |
39a269c0 AV |
28 | #endif |
29 | ||
0ee6d1ee NF |
30 | #define valid_port(index) ((index) >= 0 && (index) < AT91_MAX_USBH_PORTS) |
31 | #define at91_for_each_port(index) \ | |
32 | for ((index) = 0; (index) < AT91_MAX_USBH_PORTS; (index)++) | |
33 | ||
ed077bb7 AV |
34 | /* interface and function clocks; sometimes also an AHB clock */ |
35 | static struct clk *iclk, *fclk, *hclk; | |
0365ee0a | 36 | static int clocked; |
39a269c0 AV |
37 | |
38 | extern int usb_disabled(void); | |
39 | ||
40 | /*-------------------------------------------------------------------------*/ | |
41 | ||
ed077bb7 AV |
42 | static void at91_start_clock(void) |
43 | { | |
0af4316b | 44 | clk_enable(hclk); |
ed077bb7 AV |
45 | clk_enable(iclk); |
46 | clk_enable(fclk); | |
47 | clocked = 1; | |
48 | } | |
49 | ||
50 | static void at91_stop_clock(void) | |
51 | { | |
52 | clk_disable(fclk); | |
53 | clk_disable(iclk); | |
0af4316b | 54 | clk_disable(hclk); |
ed077bb7 AV |
55 | clocked = 0; |
56 | } | |
57 | ||
39a269c0 AV |
58 | static void at91_start_hc(struct platform_device *pdev) |
59 | { | |
60 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
61 | struct ohci_regs __iomem *regs = hcd->regs; | |
62 | ||
0365ee0a | 63 | dev_dbg(&pdev->dev, "start\n"); |
39a269c0 AV |
64 | |
65 | /* | |
66 | * Start the USB clocks. | |
67 | */ | |
ed077bb7 | 68 | at91_start_clock(); |
39a269c0 AV |
69 | |
70 | /* | |
71 | * The USB host controller must remain in reset. | |
72 | */ | |
73 | writel(0, ®s->control); | |
74 | } | |
75 | ||
76 | static void at91_stop_hc(struct platform_device *pdev) | |
77 | { | |
78 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
79 | struct ohci_regs __iomem *regs = hcd->regs; | |
80 | ||
0365ee0a | 81 | dev_dbg(&pdev->dev, "stop\n"); |
39a269c0 AV |
82 | |
83 | /* | |
84 | * Put the USB host controller into reset. | |
85 | */ | |
86 | writel(0, ®s->control); | |
87 | ||
88 | /* | |
89 | * Stop the USB clocks. | |
90 | */ | |
ed077bb7 | 91 | at91_stop_clock(); |
39a269c0 AV |
92 | } |
93 | ||
94 | ||
95 | /*-------------------------------------------------------------------------*/ | |
96 | ||
fb4e98ab | 97 | static void usb_hcd_at91_remove (struct usb_hcd *, struct platform_device *); |
39a269c0 AV |
98 | |
99 | /* configure so an HC device and id are always provided */ | |
100 | /* always called with process context; sleeping is OK */ | |
101 | ||
102 | ||
103 | /** | |
0365ee0a | 104 | * usb_hcd_at91_probe - initialize AT91-based HCDs |
39a269c0 AV |
105 | * Context: !in_interrupt() |
106 | * | |
107 | * Allocates basic resources for this USB host controller, and | |
108 | * then invokes the start() method for the HCD associated with it | |
109 | * through the hotplug entry's driver_data. | |
39a269c0 | 110 | */ |
41ac7b3a | 111 | static int usb_hcd_at91_probe(const struct hc_driver *driver, |
0365ee0a | 112 | struct platform_device *pdev) |
39a269c0 AV |
113 | { |
114 | int retval; | |
115 | struct usb_hcd *hcd = NULL; | |
116 | ||
117 | if (pdev->num_resources != 2) { | |
118 | pr_debug("hcd probe: invalid num_resources"); | |
119 | return -ENODEV; | |
120 | } | |
121 | ||
0365ee0a DB |
122 | if ((pdev->resource[0].flags != IORESOURCE_MEM) |
123 | || (pdev->resource[1].flags != IORESOURCE_IRQ)) { | |
39a269c0 AV |
124 | pr_debug("hcd probe: invalid resource type\n"); |
125 | return -ENODEV; | |
126 | } | |
127 | ||
0365ee0a | 128 | hcd = usb_create_hcd(driver, &pdev->dev, "at91"); |
39a269c0 AV |
129 | if (!hcd) |
130 | return -ENOMEM; | |
131 | hcd->rsrc_start = pdev->resource[0].start; | |
7a82f612 | 132 | hcd->rsrc_len = resource_size(&pdev->resource[0]); |
39a269c0 AV |
133 | |
134 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { | |
135 | pr_debug("request_mem_region failed\n"); | |
136 | retval = -EBUSY; | |
137 | goto err1; | |
138 | } | |
139 | ||
140 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); | |
141 | if (!hcd->regs) { | |
142 | pr_debug("ioremap failed\n"); | |
143 | retval = -EIO; | |
144 | goto err2; | |
145 | } | |
146 | ||
147 | iclk = clk_get(&pdev->dev, "ohci_clk"); | |
6813463c JCPV |
148 | if (IS_ERR(iclk)) { |
149 | dev_err(&pdev->dev, "failed to get ohci_clk\n"); | |
150 | retval = PTR_ERR(iclk); | |
151 | goto err3; | |
152 | } | |
39a269c0 | 153 | fclk = clk_get(&pdev->dev, "uhpck"); |
6813463c JCPV |
154 | if (IS_ERR(fclk)) { |
155 | dev_err(&pdev->dev, "failed to get uhpck\n"); | |
156 | retval = PTR_ERR(fclk); | |
157 | goto err4; | |
158 | } | |
0af4316b | 159 | hclk = clk_get(&pdev->dev, "hclk"); |
6813463c JCPV |
160 | if (IS_ERR(hclk)) { |
161 | dev_err(&pdev->dev, "failed to get hclk\n"); | |
162 | retval = PTR_ERR(hclk); | |
163 | goto err5; | |
164 | } | |
39a269c0 AV |
165 | |
166 | at91_start_hc(pdev); | |
167 | ohci_hcd_init(hcd_to_ohci(hcd)); | |
168 | ||
2f2cac3c | 169 | retval = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_SHARED); |
39a269c0 AV |
170 | if (retval == 0) |
171 | return retval; | |
172 | ||
173 | /* Error handling */ | |
174 | at91_stop_hc(pdev); | |
175 | ||
0af4316b | 176 | clk_put(hclk); |
6813463c | 177 | err5: |
39a269c0 | 178 | clk_put(fclk); |
6813463c | 179 | err4: |
39a269c0 AV |
180 | clk_put(iclk); |
181 | ||
6813463c | 182 | err3: |
39a269c0 AV |
183 | iounmap(hcd->regs); |
184 | ||
185 | err2: | |
186 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
187 | ||
188 | err1: | |
189 | usb_put_hcd(hcd); | |
190 | return retval; | |
191 | } | |
192 | ||
193 | ||
39a269c0 AV |
194 | /* may be called with controller, bus, and devices active */ |
195 | ||
196 | /** | |
0365ee0a | 197 | * usb_hcd_at91_remove - shutdown processing for AT91-based HCDs |
39a269c0 AV |
198 | * @dev: USB Host Controller being removed |
199 | * Context: !in_interrupt() | |
200 | * | |
201 | * Reverses the effect of usb_hcd_at91_probe(), first invoking | |
202 | * the HCD's stop() method. It is always called from a thread | |
0365ee0a | 203 | * context, "rmmod" or something similar. |
39a269c0 AV |
204 | * |
205 | */ | |
fb4e98ab | 206 | static void usb_hcd_at91_remove(struct usb_hcd *hcd, |
0365ee0a | 207 | struct platform_device *pdev) |
39a269c0 AV |
208 | { |
209 | usb_remove_hcd(hcd); | |
210 | at91_stop_hc(pdev); | |
211 | iounmap(hcd->regs); | |
68ba61b8 | 212 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
421b4bf5 | 213 | usb_put_hcd(hcd); |
39a269c0 | 214 | |
0af4316b | 215 | clk_put(hclk); |
68ba61b8 DB |
216 | clk_put(fclk); |
217 | clk_put(iclk); | |
ed077bb7 | 218 | fclk = iclk = hclk = NULL; |
39a269c0 AV |
219 | |
220 | dev_set_drvdata(&pdev->dev, NULL); | |
39a269c0 AV |
221 | } |
222 | ||
223 | /*-------------------------------------------------------------------------*/ | |
224 | ||
41ac7b3a | 225 | static int |
07e4e556 | 226 | ohci_at91_reset (struct usb_hcd *hcd) |
39a269c0 | 227 | { |
0365ee0a | 228 | struct at91_usbh_data *board = hcd->self.controller->platform_data; |
39a269c0 AV |
229 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); |
230 | int ret; | |
231 | ||
232 | if ((ret = ohci_init(ohci)) < 0) | |
233 | return ret; | |
234 | ||
cd22afda | 235 | ohci->num_ports = board->ports; |
07e4e556 NF |
236 | return 0; |
237 | } | |
238 | ||
41ac7b3a | 239 | static int |
07e4e556 NF |
240 | ohci_at91_start (struct usb_hcd *hcd) |
241 | { | |
242 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
243 | int ret; | |
0365ee0a | 244 | |
39a269c0 | 245 | if ((ret = ohci_run(ohci)) < 0) { |
2418d5f9 GKH |
246 | dev_err(hcd->self.controller, "can't start %s\n", |
247 | hcd->self.bus_name); | |
39a269c0 AV |
248 | ohci_stop(hcd); |
249 | return ret; | |
250 | } | |
39a269c0 AV |
251 | return 0; |
252 | } | |
253 | ||
aa6e52a3 TP |
254 | static void ohci_at91_usb_set_power(struct at91_usbh_data *pdata, int port, int enable) |
255 | { | |
0ee6d1ee | 256 | if (!valid_port(port)) |
aa6e52a3 TP |
257 | return; |
258 | ||
8a7a49d1 | 259 | if (!gpio_is_valid(pdata->vbus_pin[port])) |
770f0baa JCPV |
260 | return; |
261 | ||
8134ff55 | 262 | gpio_set_value(pdata->vbus_pin[port], |
1e7caf8b | 263 | pdata->vbus_pin_active_low[port] ^ enable); |
aa6e52a3 TP |
264 | } |
265 | ||
266 | static int ohci_at91_usb_get_power(struct at91_usbh_data *pdata, int port) | |
267 | { | |
0ee6d1ee | 268 | if (!valid_port(port)) |
aa6e52a3 TP |
269 | return -EINVAL; |
270 | ||
8a7a49d1 | 271 | if (!gpio_is_valid(pdata->vbus_pin[port])) |
770f0baa JCPV |
272 | return -EINVAL; |
273 | ||
8134ff55 | 274 | return gpio_get_value(pdata->vbus_pin[port]) ^ |
1e7caf8b | 275 | pdata->vbus_pin_active_low[port]; |
aa6e52a3 TP |
276 | } |
277 | ||
278 | /* | |
279 | * Update the status data from the hub with the over-current indicator change. | |
280 | */ | |
281 | static int ohci_at91_hub_status_data(struct usb_hcd *hcd, char *buf) | |
282 | { | |
283 | struct at91_usbh_data *pdata = hcd->self.controller->platform_data; | |
284 | int length = ohci_hub_status_data(hcd, buf); | |
285 | int port; | |
286 | ||
0ee6d1ee | 287 | at91_for_each_port(port) { |
aa6e52a3 | 288 | if (pdata->overcurrent_changed[port]) { |
0ee6d1ee | 289 | if (!length) |
aa6e52a3 TP |
290 | length = 1; |
291 | buf[0] |= 1 << (port + 1); | |
292 | } | |
293 | } | |
294 | ||
295 | return length; | |
296 | } | |
297 | ||
298 | /* | |
299 | * Look at the control requests to the root hub and see if we need to override. | |
300 | */ | |
301 | static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, | |
302 | u16 wIndex, char *buf, u16 wLength) | |
303 | { | |
304 | struct at91_usbh_data *pdata = hcd->self.controller->platform_data; | |
305 | struct usb_hub_descriptor *desc; | |
306 | int ret = -EINVAL; | |
307 | u32 *data = (u32 *)buf; | |
308 | ||
309 | dev_dbg(hcd->self.controller, | |
310 | "ohci_at91_hub_control(%p,0x%04x,0x%04x,0x%04x,%p,%04x)\n", | |
311 | hcd, typeReq, wValue, wIndex, buf, wLength); | |
312 | ||
0ee6d1ee NF |
313 | wIndex--; |
314 | ||
aa6e52a3 TP |
315 | switch (typeReq) { |
316 | case SetPortFeature: | |
317 | if (wValue == USB_PORT_FEAT_POWER) { | |
318 | dev_dbg(hcd->self.controller, "SetPortFeat: POWER\n"); | |
0ee6d1ee NF |
319 | if (valid_port(wIndex)) { |
320 | ohci_at91_usb_set_power(pdata, wIndex, 1); | |
321 | ret = 0; | |
322 | } | |
323 | ||
aa6e52a3 TP |
324 | goto out; |
325 | } | |
326 | break; | |
327 | ||
328 | case ClearPortFeature: | |
329 | switch (wValue) { | |
330 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
331 | dev_dbg(hcd->self.controller, | |
332 | "ClearPortFeature: C_OVER_CURRENT\n"); | |
333 | ||
0ee6d1ee NF |
334 | if (valid_port(wIndex)) { |
335 | pdata->overcurrent_changed[wIndex] = 0; | |
336 | pdata->overcurrent_status[wIndex] = 0; | |
aa6e52a3 TP |
337 | } |
338 | ||
339 | goto out; | |
340 | ||
341 | case USB_PORT_FEAT_OVER_CURRENT: | |
342 | dev_dbg(hcd->self.controller, | |
343 | "ClearPortFeature: OVER_CURRENT\n"); | |
344 | ||
0ee6d1ee NF |
345 | if (valid_port(wIndex)) |
346 | pdata->overcurrent_status[wIndex] = 0; | |
aa6e52a3 TP |
347 | |
348 | goto out; | |
349 | ||
350 | case USB_PORT_FEAT_POWER: | |
351 | dev_dbg(hcd->self.controller, | |
352 | "ClearPortFeature: POWER\n"); | |
353 | ||
0ee6d1ee NF |
354 | if (valid_port(wIndex)) { |
355 | ohci_at91_usb_set_power(pdata, wIndex, 0); | |
aa6e52a3 TP |
356 | return 0; |
357 | } | |
358 | } | |
359 | break; | |
360 | } | |
361 | ||
0ee6d1ee | 362 | ret = ohci_hub_control(hcd, typeReq, wValue, wIndex + 1, buf, wLength); |
aa6e52a3 TP |
363 | if (ret) |
364 | goto out; | |
365 | ||
366 | switch (typeReq) { | |
367 | case GetHubDescriptor: | |
368 | ||
369 | /* update the hub's descriptor */ | |
370 | ||
371 | desc = (struct usb_hub_descriptor *)buf; | |
372 | ||
373 | dev_dbg(hcd->self.controller, "wHubCharacteristics 0x%04x\n", | |
374 | desc->wHubCharacteristics); | |
375 | ||
376 | /* remove the old configurations for power-switching, and | |
377 | * over-current protection, and insert our new configuration | |
378 | */ | |
379 | ||
380 | desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_LPSM); | |
381 | desc->wHubCharacteristics |= cpu_to_le16(0x0001); | |
382 | ||
383 | if (pdata->overcurrent_supported) { | |
384 | desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_OCPM); | |
385 | desc->wHubCharacteristics |= cpu_to_le16(0x0008|0x0001); | |
386 | } | |
387 | ||
388 | dev_dbg(hcd->self.controller, "wHubCharacteristics after 0x%04x\n", | |
389 | desc->wHubCharacteristics); | |
390 | ||
391 | return ret; | |
392 | ||
393 | case GetPortStatus: | |
394 | /* check port status */ | |
395 | ||
396 | dev_dbg(hcd->self.controller, "GetPortStatus(%d)\n", wIndex); | |
397 | ||
0ee6d1ee NF |
398 | if (valid_port(wIndex)) { |
399 | if (!ohci_at91_usb_get_power(pdata, wIndex)) | |
aa6e52a3 | 400 | *data &= ~cpu_to_le32(RH_PS_PPS); |
aa6e52a3 | 401 | |
0ee6d1ee | 402 | if (pdata->overcurrent_changed[wIndex]) |
aa6e52a3 | 403 | *data |= cpu_to_le32(RH_PS_OCIC); |
aa6e52a3 | 404 | |
0ee6d1ee | 405 | if (pdata->overcurrent_status[wIndex]) |
aa6e52a3 | 406 | *data |= cpu_to_le32(RH_PS_POCI); |
aa6e52a3 TP |
407 | } |
408 | } | |
409 | ||
410 | out: | |
411 | return ret; | |
412 | } | |
413 | ||
39a269c0 AV |
414 | /*-------------------------------------------------------------------------*/ |
415 | ||
416 | static const struct hc_driver ohci_at91_hc_driver = { | |
417 | .description = hcd_name, | |
0365ee0a | 418 | .product_desc = "AT91 OHCI", |
39a269c0 AV |
419 | .hcd_priv_size = sizeof(struct ohci_hcd), |
420 | ||
421 | /* | |
422 | * generic hardware linkage | |
423 | */ | |
424 | .irq = ohci_irq, | |
425 | .flags = HCD_USB11 | HCD_MEMORY, | |
426 | ||
427 | /* | |
428 | * basic lifecycle operations | |
429 | */ | |
07e4e556 | 430 | .reset = ohci_at91_reset, |
39a269c0 AV |
431 | .start = ohci_at91_start, |
432 | .stop = ohci_stop, | |
dd9048af | 433 | .shutdown = ohci_shutdown, |
39a269c0 AV |
434 | |
435 | /* | |
436 | * managing i/o requests and associated device resources | |
437 | */ | |
438 | .urb_enqueue = ohci_urb_enqueue, | |
439 | .urb_dequeue = ohci_urb_dequeue, | |
440 | .endpoint_disable = ohci_endpoint_disable, | |
441 | ||
442 | /* | |
443 | * scheduling support | |
444 | */ | |
445 | .get_frame_number = ohci_get_frame, | |
446 | ||
447 | /* | |
448 | * root hub support | |
449 | */ | |
aa6e52a3 TP |
450 | .hub_status_data = ohci_at91_hub_status_data, |
451 | .hub_control = ohci_at91_hub_control, | |
39a269c0 | 452 | #ifdef CONFIG_PM |
68ba61b8 DB |
453 | .bus_suspend = ohci_bus_suspend, |
454 | .bus_resume = ohci_bus_resume, | |
39a269c0 AV |
455 | #endif |
456 | .start_port_reset = ohci_start_port_reset, | |
457 | }; | |
458 | ||
459 | /*-------------------------------------------------------------------------*/ | |
460 | ||
aa6e52a3 TP |
461 | static irqreturn_t ohci_hcd_at91_overcurrent_irq(int irq, void *data) |
462 | { | |
463 | struct platform_device *pdev = data; | |
464 | struct at91_usbh_data *pdata = pdev->dev.platform_data; | |
465 | int val, gpio, port; | |
466 | ||
467 | /* From the GPIO notifying the over-current situation, find | |
468 | * out the corresponding port */ | |
0ee6d1ee | 469 | at91_for_each_port(port) { |
01bb6501 JE |
470 | if (gpio_is_valid(pdata->overcurrent_pin[port]) && |
471 | gpio_to_irq(pdata->overcurrent_pin[port]) == irq) { | |
e4499079 | 472 | gpio = pdata->overcurrent_pin[port]; |
aa6e52a3 | 473 | break; |
e4499079 | 474 | } |
aa6e52a3 TP |
475 | } |
476 | ||
0ee6d1ee | 477 | if (port == AT91_MAX_USBH_PORTS) { |
aa6e52a3 TP |
478 | dev_err(& pdev->dev, "overcurrent interrupt from unknown GPIO\n"); |
479 | return IRQ_HANDLED; | |
480 | } | |
481 | ||
482 | val = gpio_get_value(gpio); | |
483 | ||
484 | /* When notified of an over-current situation, disable power | |
485 | on the corresponding port, and mark this port in | |
486 | over-current. */ | |
0ee6d1ee | 487 | if (!val) { |
aa6e52a3 TP |
488 | ohci_at91_usb_set_power(pdata, port, 0); |
489 | pdata->overcurrent_status[port] = 1; | |
490 | pdata->overcurrent_changed[port] = 1; | |
491 | } | |
492 | ||
493 | dev_dbg(& pdev->dev, "overcurrent situation %s\n", | |
494 | val ? "exited" : "notified"); | |
495 | ||
496 | return IRQ_HANDLED; | |
497 | } | |
498 | ||
2419730f JCPV |
499 | #ifdef CONFIG_OF |
500 | static const struct of_device_id at91_ohci_dt_ids[] = { | |
501 | { .compatible = "atmel,at91rm9200-ohci" }, | |
502 | { /* sentinel */ } | |
503 | }; | |
504 | ||
505 | MODULE_DEVICE_TABLE(of, at91_ohci_dt_ids); | |
506 | ||
507 | static u64 at91_ohci_dma_mask = DMA_BIT_MASK(32); | |
508 | ||
41ac7b3a | 509 | static int ohci_at91_of_init(struct platform_device *pdev) |
2419730f JCPV |
510 | { |
511 | struct device_node *np = pdev->dev.of_node; | |
aaf9f5fc | 512 | int i, gpio; |
2419730f JCPV |
513 | enum of_gpio_flags flags; |
514 | struct at91_usbh_data *pdata; | |
515 | u32 ports; | |
516 | ||
517 | if (!np) | |
518 | return 0; | |
519 | ||
520 | /* Right now device-tree probed devices don't get dma_mask set. | |
521 | * Since shared usb code relies on it, set it here for now. | |
522 | * Once we have dma capability bindings this can go away. | |
523 | */ | |
524 | if (!pdev->dev.dma_mask) | |
525 | pdev->dev.dma_mask = &at91_ohci_dma_mask; | |
526 | ||
527 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); | |
528 | if (!pdata) | |
529 | return -ENOMEM; | |
530 | ||
531 | if (!of_property_read_u32(np, "num-ports", &ports)) | |
532 | pdata->ports = ports; | |
533 | ||
0ee6d1ee | 534 | at91_for_each_port(i) { |
2419730f JCPV |
535 | gpio = of_get_named_gpio_flags(np, "atmel,vbus-gpio", i, &flags); |
536 | pdata->vbus_pin[i] = gpio; | |
537 | if (!gpio_is_valid(gpio)) | |
538 | continue; | |
539 | pdata->vbus_pin_active_low[i] = flags & OF_GPIO_ACTIVE_LOW; | |
2419730f JCPV |
540 | } |
541 | ||
0ee6d1ee | 542 | at91_for_each_port(i) |
aaf9f5fc NF |
543 | pdata->overcurrent_pin[i] = |
544 | of_get_named_gpio_flags(np, "atmel,oc-gpio", i, &flags); | |
2419730f JCPV |
545 | |
546 | pdev->dev.platform_data = pdata; | |
547 | ||
548 | return 0; | |
549 | } | |
550 | #else | |
41ac7b3a | 551 | static int ohci_at91_of_init(struct platform_device *pdev) |
2419730f JCPV |
552 | { |
553 | return 0; | |
554 | } | |
555 | #endif | |
556 | ||
aa6e52a3 TP |
557 | /*-------------------------------------------------------------------------*/ |
558 | ||
41ac7b3a | 559 | static int ohci_hcd_at91_drv_probe(struct platform_device *pdev) |
39a269c0 | 560 | { |
2419730f | 561 | struct at91_usbh_data *pdata; |
4bde4a4c | 562 | int i; |
aaf9f5fc NF |
563 | int gpio; |
564 | int ret; | |
4bde4a4c | 565 | |
1887ab2b NF |
566 | ret = ohci_at91_of_init(pdev); |
567 | if (ret) | |
568 | return ret; | |
2419730f JCPV |
569 | |
570 | pdata = pdev->dev.platform_data; | |
571 | ||
4bde4a4c | 572 | if (pdata) { |
0ee6d1ee | 573 | at91_for_each_port(i) { |
6fffb77c NF |
574 | /* |
575 | * do not configure PIO if not in relation with | |
576 | * real USB port on board | |
577 | */ | |
578 | if (i >= pdata->ports) { | |
579 | pdata->vbus_pin[i] = -EINVAL; | |
580 | pdata->overcurrent_pin[i] = -EINVAL; | |
581 | break; | |
582 | } | |
583 | ||
8a7a49d1 | 584 | if (!gpio_is_valid(pdata->vbus_pin[i])) |
4bde4a4c | 585 | continue; |
aaf9f5fc NF |
586 | gpio = pdata->vbus_pin[i]; |
587 | ||
588 | ret = gpio_request(gpio, "ohci_vbus"); | |
589 | if (ret) { | |
590 | dev_err(&pdev->dev, | |
591 | "can't request vbus gpio %d\n", gpio); | |
592 | continue; | |
593 | } | |
594 | ret = gpio_direction_output(gpio, | |
595 | !pdata->vbus_pin_active_low[i]); | |
596 | if (ret) { | |
597 | dev_err(&pdev->dev, | |
598 | "can't put vbus gpio %d as output %d\n", | |
599 | gpio, !pdata->vbus_pin_active_low[i]); | |
600 | gpio_free(gpio); | |
601 | continue; | |
602 | } | |
603 | ||
aa6e52a3 TP |
604 | ohci_at91_usb_set_power(pdata, i, 1); |
605 | } | |
606 | ||
0ee6d1ee | 607 | at91_for_each_port(i) { |
8a7a49d1 | 608 | if (!gpio_is_valid(pdata->overcurrent_pin[i])) |
aa6e52a3 | 609 | continue; |
aaf9f5fc NF |
610 | gpio = pdata->overcurrent_pin[i]; |
611 | ||
612 | ret = gpio_request(gpio, "ohci_overcurrent"); | |
613 | if (ret) { | |
614 | dev_err(&pdev->dev, | |
615 | "can't request overcurrent gpio %d\n", | |
616 | gpio); | |
617 | continue; | |
618 | } | |
619 | ||
620 | ret = gpio_direction_input(gpio); | |
621 | if (ret) { | |
622 | dev_err(&pdev->dev, | |
623 | "can't configure overcurrent gpio %d as input\n", | |
624 | gpio); | |
625 | gpio_free(gpio); | |
626 | continue; | |
627 | } | |
aa6e52a3 | 628 | |
aaf9f5fc | 629 | ret = request_irq(gpio_to_irq(gpio), |
aa6e52a3 TP |
630 | ohci_hcd_at91_overcurrent_irq, |
631 | IRQF_SHARED, "ohci_overcurrent", pdev); | |
632 | if (ret) { | |
aaf9f5fc NF |
633 | gpio_free(gpio); |
634 | dev_err(&pdev->dev, | |
635 | "can't get gpio IRQ for overcurrent\n"); | |
aa6e52a3 | 636 | } |
4bde4a4c DB |
637 | } |
638 | } | |
639 | ||
0365ee0a DB |
640 | device_init_wakeup(&pdev->dev, 1); |
641 | return usb_hcd_at91_probe(&ohci_at91_hc_driver, pdev); | |
39a269c0 AV |
642 | } |
643 | ||
fb4e98ab | 644 | static int ohci_hcd_at91_drv_remove(struct platform_device *pdev) |
39a269c0 | 645 | { |
4bde4a4c DB |
646 | struct at91_usbh_data *pdata = pdev->dev.platform_data; |
647 | int i; | |
648 | ||
649 | if (pdata) { | |
0ee6d1ee | 650 | at91_for_each_port(i) { |
8a7a49d1 | 651 | if (!gpio_is_valid(pdata->vbus_pin[i])) |
4bde4a4c | 652 | continue; |
aa6e52a3 | 653 | ohci_at91_usb_set_power(pdata, i, 0); |
4bde4a4c DB |
654 | gpio_free(pdata->vbus_pin[i]); |
655 | } | |
aa6e52a3 | 656 | |
0ee6d1ee | 657 | at91_for_each_port(i) { |
8a7a49d1 | 658 | if (!gpio_is_valid(pdata->overcurrent_pin[i])) |
aa6e52a3 TP |
659 | continue; |
660 | free_irq(gpio_to_irq(pdata->overcurrent_pin[i]), pdev); | |
661 | gpio_free(pdata->overcurrent_pin[i]); | |
662 | } | |
4bde4a4c DB |
663 | } |
664 | ||
0365ee0a | 665 | device_init_wakeup(&pdev->dev, 0); |
421b4bf5 PZ |
666 | usb_hcd_at91_remove(platform_get_drvdata(pdev), pdev); |
667 | return 0; | |
39a269c0 AV |
668 | } |
669 | ||
670 | #ifdef CONFIG_PM | |
39a269c0 | 671 | |
68ba61b8 | 672 | static int |
0365ee0a | 673 | ohci_hcd_at91_drv_suspend(struct platform_device *pdev, pm_message_t mesg) |
68ba61b8 | 674 | { |
0365ee0a DB |
675 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
676 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); | |
677 | ||
678 | if (device_may_wakeup(&pdev->dev)) | |
679 | enable_irq_wake(hcd->irq); | |
0365ee0a DB |
680 | |
681 | /* | |
682 | * The integrated transceivers seem unable to notice disconnect, | |
683 | * reconnect, or wakeup without the 48 MHz clock active. so for | |
684 | * correctness, always discard connection state (using reset). | |
685 | * | |
686 | * REVISIT: some boards will be able to turn VBUS off... | |
687 | */ | |
688 | if (at91_suspend_entering_slow_clock()) { | |
689 | ohci_usb_reset (ohci); | |
869aa98c PV |
690 | /* flush the writes */ |
691 | (void) ohci_readl (ohci, &ohci->regs->control); | |
ed077bb7 | 692 | at91_stop_clock(); |
0365ee0a | 693 | } |
39a269c0 AV |
694 | |
695 | return 0; | |
696 | } | |
697 | ||
0365ee0a | 698 | static int ohci_hcd_at91_drv_resume(struct platform_device *pdev) |
39a269c0 | 699 | { |
6dde896e MP |
700 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
701 | ||
702 | if (device_may_wakeup(&pdev->dev)) | |
703 | disable_irq_wake(hcd->irq); | |
704 | ||
ed077bb7 AV |
705 | if (!clocked) |
706 | at91_start_clock(); | |
39a269c0 | 707 | |
cfa49b4b | 708 | ohci_resume(hcd, false); |
39a269c0 AV |
709 | return 0; |
710 | } | |
711 | #else | |
712 | #define ohci_hcd_at91_drv_suspend NULL | |
713 | #define ohci_hcd_at91_drv_resume NULL | |
714 | #endif | |
715 | ||
f4fce61d | 716 | MODULE_ALIAS("platform:at91_ohci"); |
68ba61b8 | 717 | |
39a269c0 AV |
718 | static struct platform_driver ohci_hcd_at91_driver = { |
719 | .probe = ohci_hcd_at91_drv_probe, | |
7690417d | 720 | .remove = ohci_hcd_at91_drv_remove, |
64a21d02 | 721 | .shutdown = usb_hcd_platform_shutdown, |
39a269c0 AV |
722 | .suspend = ohci_hcd_at91_drv_suspend, |
723 | .resume = ohci_hcd_at91_drv_resume, | |
724 | .driver = { | |
0365ee0a | 725 | .name = "at91_ohci", |
39a269c0 | 726 | .owner = THIS_MODULE, |
2419730f | 727 | .of_match_table = of_match_ptr(at91_ohci_dt_ids), |
39a269c0 AV |
728 | }, |
729 | }; |