blob: aaa8d2bce21702aa8d7844bb343de68bd30f0a3d [file] [log] [blame]
Andrew Victor39a269c2006-01-22 10:32:13 -08001/*
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 *
David Brownell0365ee02006-06-19 14:27:20 -07007 * AT91 Bus Glue
Andrew Victor39a269c2006-01-22 10:32:13 -08008 *
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>
Jean-Christophe PLAGNIOL-VILLARD24197302011-11-21 06:55:18 +080017#include <linux/of_platform.h>
18#include <linux/of_gpio.h>
Andrew Victor39a269c2006-01-22 10:32:13 -080019
Russell Kinga09e64f2008-08-05 16:14:15 +010020#include <mach/hardware.h>
David Brownell4bde4a42007-12-27 11:19:49 -080021#include <asm/gpio.h>
22
Russell Kinga09e64f2008-08-05 16:14:15 +010023#include <mach/board.h>
24#include <mach/cpu.h>
Andrew Victor39a269c2006-01-22 10:32:13 -080025
David Brownell0365ee02006-06-19 14:27:20 -070026#ifndef CONFIG_ARCH_AT91
27#error "CONFIG_ARCH_AT91 must be defined."
Andrew Victor39a269c2006-01-22 10:32:13 -080028#endif
29
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +010030#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
Andrew Victored077bb2007-02-16 10:18:58 -080034/* interface and function clocks; sometimes also an AHB clock */
35static struct clk *iclk, *fclk, *hclk;
David Brownell0365ee02006-06-19 14:27:20 -070036static int clocked;
Andrew Victor39a269c2006-01-22 10:32:13 -080037
38extern int usb_disabled(void);
39
40/*-------------------------------------------------------------------------*/
41
Andrew Victored077bb2007-02-16 10:18:58 -080042static void at91_start_clock(void)
43{
Jean-Christophe PLAGNIOL-VILLARD0af43162011-08-30 03:29:28 +020044 clk_enable(hclk);
Andrew Victored077bb2007-02-16 10:18:58 -080045 clk_enable(iclk);
46 clk_enable(fclk);
47 clocked = 1;
48}
49
50static void at91_stop_clock(void)
51{
52 clk_disable(fclk);
53 clk_disable(iclk);
Jean-Christophe PLAGNIOL-VILLARD0af43162011-08-30 03:29:28 +020054 clk_disable(hclk);
Andrew Victored077bb2007-02-16 10:18:58 -080055 clocked = 0;
56}
57
Andrew Victor39a269c2006-01-22 10:32:13 -080058static 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
David Brownell0365ee02006-06-19 14:27:20 -070063 dev_dbg(&pdev->dev, "start\n");
Andrew Victor39a269c2006-01-22 10:32:13 -080064
65 /*
66 * Start the USB clocks.
67 */
Andrew Victored077bb2007-02-16 10:18:58 -080068 at91_start_clock();
Andrew Victor39a269c2006-01-22 10:32:13 -080069
70 /*
71 * The USB host controller must remain in reset.
72 */
73 writel(0, &regs->control);
74}
75
76static 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
David Brownell0365ee02006-06-19 14:27:20 -070081 dev_dbg(&pdev->dev, "stop\n");
Andrew Victor39a269c2006-01-22 10:32:13 -080082
83 /*
84 * Put the USB host controller into reset.
85 */
86 writel(0, &regs->control);
87
88 /*
89 * Stop the USB clocks.
90 */
Andrew Victored077bb2007-02-16 10:18:58 -080091 at91_stop_clock();
Andrew Victor39a269c2006-01-22 10:32:13 -080092}
93
94
95/*-------------------------------------------------------------------------*/
96
Nicolas Ferreb548a272012-04-06 14:35:38 +020097static void __devexit usb_hcd_at91_remove (struct usb_hcd *, struct platform_device *);
Andrew Victor39a269c2006-01-22 10:32:13 -080098
99/* configure so an HC device and id are always provided */
100/* always called with process context; sleeping is OK */
101
102
103/**
David Brownell0365ee02006-06-19 14:27:20 -0700104 * usb_hcd_at91_probe - initialize AT91-based HCDs
Andrew Victor39a269c2006-01-22 10:32:13 -0800105 * 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.
Andrew Victor39a269c2006-01-22 10:32:13 -0800110 */
Nicolas Ferreb548a272012-04-06 14:35:38 +0200111static int __devinit usb_hcd_at91_probe(const struct hc_driver *driver,
David Brownell0365ee02006-06-19 14:27:20 -0700112 struct platform_device *pdev)
Andrew Victor39a269c2006-01-22 10:32:13 -0800113{
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
David Brownell0365ee02006-06-19 14:27:20 -0700122 if ((pdev->resource[0].flags != IORESOURCE_MEM)
123 || (pdev->resource[1].flags != IORESOURCE_IRQ)) {
Andrew Victor39a269c2006-01-22 10:32:13 -0800124 pr_debug("hcd probe: invalid resource type\n");
125 return -ENODEV;
126 }
127
David Brownell0365ee02006-06-19 14:27:20 -0700128 hcd = usb_create_hcd(driver, &pdev->dev, "at91");
Andrew Victor39a269c2006-01-22 10:32:13 -0800129 if (!hcd)
130 return -ENOMEM;
131 hcd->rsrc_start = pdev->resource[0].start;
Nicolas Ferre7a82f612012-05-09 10:49:41 +0200132 hcd->rsrc_len = resource_size(&pdev->resource[0]);
Andrew Victor39a269c2006-01-22 10:32:13 -0800133
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");
Jean-Christophe PLAGNIOL-VILLARD68134632011-12-08 16:32:00 +0100148 if (IS_ERR(iclk)) {
149 dev_err(&pdev->dev, "failed to get ohci_clk\n");
150 retval = PTR_ERR(iclk);
151 goto err3;
152 }
Andrew Victor39a269c2006-01-22 10:32:13 -0800153 fclk = clk_get(&pdev->dev, "uhpck");
Jean-Christophe PLAGNIOL-VILLARD68134632011-12-08 16:32:00 +0100154 if (IS_ERR(fclk)) {
155 dev_err(&pdev->dev, "failed to get uhpck\n");
156 retval = PTR_ERR(fclk);
157 goto err4;
158 }
Jean-Christophe PLAGNIOL-VILLARD0af43162011-08-30 03:29:28 +0200159 hclk = clk_get(&pdev->dev, "hclk");
Jean-Christophe PLAGNIOL-VILLARD68134632011-12-08 16:32:00 +0100160 if (IS_ERR(hclk)) {
161 dev_err(&pdev->dev, "failed to get hclk\n");
162 retval = PTR_ERR(hclk);
163 goto err5;
164 }
Andrew Victor39a269c2006-01-22 10:32:13 -0800165
166 at91_start_hc(pdev);
167 ohci_hcd_init(hcd_to_ohci(hcd));
168
Nicolas Ferre2f2cac32009-07-27 14:59:24 -0700169 retval = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_SHARED);
Andrew Victor39a269c2006-01-22 10:32:13 -0800170 if (retval == 0)
171 return retval;
172
173 /* Error handling */
174 at91_stop_hc(pdev);
175
Jean-Christophe PLAGNIOL-VILLARD0af43162011-08-30 03:29:28 +0200176 clk_put(hclk);
Jean-Christophe PLAGNIOL-VILLARD68134632011-12-08 16:32:00 +0100177 err5:
Andrew Victor39a269c2006-01-22 10:32:13 -0800178 clk_put(fclk);
Jean-Christophe PLAGNIOL-VILLARD68134632011-12-08 16:32:00 +0100179 err4:
Andrew Victor39a269c2006-01-22 10:32:13 -0800180 clk_put(iclk);
181
Jean-Christophe PLAGNIOL-VILLARD68134632011-12-08 16:32:00 +0100182 err3:
Andrew Victor39a269c2006-01-22 10:32:13 -0800183 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
Andrew Victor39a269c2006-01-22 10:32:13 -0800194/* may be called with controller, bus, and devices active */
195
196/**
David Brownell0365ee02006-06-19 14:27:20 -0700197 * usb_hcd_at91_remove - shutdown processing for AT91-based HCDs
Andrew Victor39a269c2006-01-22 10:32:13 -0800198 * @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
David Brownell0365ee02006-06-19 14:27:20 -0700203 * context, "rmmod" or something similar.
Andrew Victor39a269c2006-01-22 10:32:13 -0800204 *
205 */
Nicolas Ferreb548a272012-04-06 14:35:38 +0200206static void __devexit usb_hcd_at91_remove(struct usb_hcd *hcd,
David Brownell0365ee02006-06-19 14:27:20 -0700207 struct platform_device *pdev)
Andrew Victor39a269c2006-01-22 10:32:13 -0800208{
209 usb_remove_hcd(hcd);
210 at91_stop_hc(pdev);
211 iounmap(hcd->regs);
David Brownell68ba61b2006-04-02 20:26:21 -0800212 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
Pete Zaitcev421b4bf2008-06-01 14:38:43 -0700213 usb_put_hcd(hcd);
Andrew Victor39a269c2006-01-22 10:32:13 -0800214
Jean-Christophe PLAGNIOL-VILLARD0af43162011-08-30 03:29:28 +0200215 clk_put(hclk);
David Brownell68ba61b2006-04-02 20:26:21 -0800216 clk_put(fclk);
217 clk_put(iclk);
Andrew Victored077bb2007-02-16 10:18:58 -0800218 fclk = iclk = hclk = NULL;
Andrew Victor39a269c2006-01-22 10:32:13 -0800219
220 dev_set_drvdata(&pdev->dev, NULL);
Andrew Victor39a269c2006-01-22 10:32:13 -0800221}
222
223/*-------------------------------------------------------------------------*/
224
225static int __devinit
Nicolas Ferre07e4e552012-05-09 10:48:54 +0200226ohci_at91_reset (struct usb_hcd *hcd)
Andrew Victor39a269c2006-01-22 10:32:13 -0800227{
David Brownell0365ee02006-06-19 14:27:20 -0700228 struct at91_usbh_data *board = hcd->self.controller->platform_data;
Andrew Victor39a269c2006-01-22 10:32:13 -0800229 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
230 int ret;
231
232 if ((ret = ohci_init(ohci)) < 0)
233 return ret;
234
David Brownellcd22afd2006-09-03 12:21:50 -0700235 ohci->num_ports = board->ports;
Nicolas Ferre07e4e552012-05-09 10:48:54 +0200236 return 0;
237}
238
239static int __devinit
240ohci_at91_start (struct usb_hcd *hcd)
241{
242 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
243 int ret;
David Brownell0365ee02006-06-19 14:27:20 -0700244
Andrew Victor39a269c2006-01-22 10:32:13 -0800245 if ((ret = ohci_run(ohci)) < 0) {
Greg Kroah-Hartman2418d5f2012-04-27 11:24:39 -0700246 dev_err(hcd->self.controller, "can't start %s\n",
247 hcd->self.bus_name);
Andrew Victor39a269c2006-01-22 10:32:13 -0800248 ohci_stop(hcd);
249 return ret;
250 }
Andrew Victor39a269c2006-01-22 10:32:13 -0800251 return 0;
252}
253
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200254static void ohci_at91_usb_set_power(struct at91_usbh_data *pdata, int port, int enable)
255{
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100256 if (!valid_port(port))
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200257 return;
258
Jean-Christophe PLAGNIOL-VILLARD8a7a49d2011-09-19 15:32:23 +0800259 if (!gpio_is_valid(pdata->vbus_pin[port]))
Jean-Christophe PLAGNIOL-VILLARD770f0ba2011-11-12 16:46:13 +0100260 return;
261
Jean-Christophe PLAGNIOL-VILLARD8134ff52011-12-08 16:32:01 +0100262 gpio_set_value(pdata->vbus_pin[port],
Nicolas Ferre1e7caf82012-03-21 14:38:55 +0100263 pdata->vbus_pin_active_low[port] ^ enable);
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200264}
265
266static int ohci_at91_usb_get_power(struct at91_usbh_data *pdata, int port)
267{
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100268 if (!valid_port(port))
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200269 return -EINVAL;
270
Jean-Christophe PLAGNIOL-VILLARD8a7a49d2011-09-19 15:32:23 +0800271 if (!gpio_is_valid(pdata->vbus_pin[port]))
Jean-Christophe PLAGNIOL-VILLARD770f0ba2011-11-12 16:46:13 +0100272 return -EINVAL;
273
Jean-Christophe PLAGNIOL-VILLARD8134ff52011-12-08 16:32:01 +0100274 return gpio_get_value(pdata->vbus_pin[port]) ^
Nicolas Ferre1e7caf82012-03-21 14:38:55 +0100275 pdata->vbus_pin_active_low[port];
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200276}
277
278/*
279 * Update the status data from the hub with the over-current indicator change.
280 */
281static 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
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100287 at91_for_each_port(port) {
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200288 if (pdata->overcurrent_changed[port]) {
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100289 if (!length)
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200290 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 */
301static 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
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100313 wIndex--;
314
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200315 switch (typeReq) {
316 case SetPortFeature:
317 if (wValue == USB_PORT_FEAT_POWER) {
318 dev_dbg(hcd->self.controller, "SetPortFeat: POWER\n");
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100319 if (valid_port(wIndex)) {
320 ohci_at91_usb_set_power(pdata, wIndex, 1);
321 ret = 0;
322 }
323
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200324 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
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100334 if (valid_port(wIndex)) {
335 pdata->overcurrent_changed[wIndex] = 0;
336 pdata->overcurrent_status[wIndex] = 0;
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200337 }
338
339 goto out;
340
341 case USB_PORT_FEAT_OVER_CURRENT:
342 dev_dbg(hcd->self.controller,
343 "ClearPortFeature: OVER_CURRENT\n");
344
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100345 if (valid_port(wIndex))
346 pdata->overcurrent_status[wIndex] = 0;
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200347
348 goto out;
349
350 case USB_PORT_FEAT_POWER:
351 dev_dbg(hcd->self.controller,
352 "ClearPortFeature: POWER\n");
353
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100354 if (valid_port(wIndex)) {
355 ohci_at91_usb_set_power(pdata, wIndex, 0);
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200356 return 0;
357 }
358 }
359 break;
360 }
361
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100362 ret = ohci_hub_control(hcd, typeReq, wValue, wIndex + 1, buf, wLength);
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200363 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
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100398 if (valid_port(wIndex)) {
399 if (!ohci_at91_usb_get_power(pdata, wIndex))
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200400 *data &= ~cpu_to_le32(RH_PS_PPS);
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200401
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100402 if (pdata->overcurrent_changed[wIndex])
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200403 *data |= cpu_to_le32(RH_PS_OCIC);
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200404
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100405 if (pdata->overcurrent_status[wIndex])
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200406 *data |= cpu_to_le32(RH_PS_POCI);
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200407 }
408 }
409
410 out:
411 return ret;
412}
413
Andrew Victor39a269c2006-01-22 10:32:13 -0800414/*-------------------------------------------------------------------------*/
415
416static const struct hc_driver ohci_at91_hc_driver = {
417 .description = hcd_name,
David Brownell0365ee02006-06-19 14:27:20 -0700418 .product_desc = "AT91 OHCI",
Andrew Victor39a269c2006-01-22 10:32:13 -0800419 .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 */
Nicolas Ferre07e4e552012-05-09 10:48:54 +0200430 .reset = ohci_at91_reset,
Andrew Victor39a269c2006-01-22 10:32:13 -0800431 .start = ohci_at91_start,
432 .stop = ohci_stop,
David Brownelldd9048a2006-12-05 03:18:31 -0800433 .shutdown = ohci_shutdown,
Andrew Victor39a269c2006-01-22 10:32:13 -0800434
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 */
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200450 .hub_status_data = ohci_at91_hub_status_data,
451 .hub_control = ohci_at91_hub_control,
Andrew Victor39a269c2006-01-22 10:32:13 -0800452#ifdef CONFIG_PM
David Brownell68ba61b2006-04-02 20:26:21 -0800453 .bus_suspend = ohci_bus_suspend,
454 .bus_resume = ohci_bus_resume,
Andrew Victor39a269c2006-01-22 10:32:13 -0800455#endif
456 .start_port_reset = ohci_start_port_reset,
457};
458
459/*-------------------------------------------------------------------------*/
460
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200461static 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 */
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100469 at91_for_each_port(port) {
Nicolas Ferree4499072012-02-11 14:23:06 +0100470 if (gpio_to_irq(pdata->overcurrent_pin[port]) == irq) {
471 gpio = pdata->overcurrent_pin[port];
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200472 break;
Nicolas Ferree4499072012-02-11 14:23:06 +0100473 }
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200474 }
475
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100476 if (port == AT91_MAX_USBH_PORTS) {
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200477 dev_err(& pdev->dev, "overcurrent interrupt from unknown GPIO\n");
478 return IRQ_HANDLED;
479 }
480
481 val = gpio_get_value(gpio);
482
483 /* When notified of an over-current situation, disable power
484 on the corresponding port, and mark this port in
485 over-current. */
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100486 if (!val) {
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200487 ohci_at91_usb_set_power(pdata, port, 0);
488 pdata->overcurrent_status[port] = 1;
489 pdata->overcurrent_changed[port] = 1;
490 }
491
492 dev_dbg(& pdev->dev, "overcurrent situation %s\n",
493 val ? "exited" : "notified");
494
495 return IRQ_HANDLED;
496}
497
Jean-Christophe PLAGNIOL-VILLARD24197302011-11-21 06:55:18 +0800498#ifdef CONFIG_OF
499static const struct of_device_id at91_ohci_dt_ids[] = {
500 { .compatible = "atmel,at91rm9200-ohci" },
501 { /* sentinel */ }
502};
503
504MODULE_DEVICE_TABLE(of, at91_ohci_dt_ids);
505
506static u64 at91_ohci_dma_mask = DMA_BIT_MASK(32);
507
508static int __devinit ohci_at91_of_init(struct platform_device *pdev)
509{
510 struct device_node *np = pdev->dev.of_node;
Nicolas Ferreaaf9f5f2012-03-21 16:58:11 +0100511 int i, gpio;
Jean-Christophe PLAGNIOL-VILLARD24197302011-11-21 06:55:18 +0800512 enum of_gpio_flags flags;
513 struct at91_usbh_data *pdata;
514 u32 ports;
515
516 if (!np)
517 return 0;
518
519 /* Right now device-tree probed devices don't get dma_mask set.
520 * Since shared usb code relies on it, set it here for now.
521 * Once we have dma capability bindings this can go away.
522 */
523 if (!pdev->dev.dma_mask)
524 pdev->dev.dma_mask = &at91_ohci_dma_mask;
525
526 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
527 if (!pdata)
528 return -ENOMEM;
529
530 if (!of_property_read_u32(np, "num-ports", &ports))
531 pdata->ports = ports;
532
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100533 at91_for_each_port(i) {
Jean-Christophe PLAGNIOL-VILLARD24197302011-11-21 06:55:18 +0800534 gpio = of_get_named_gpio_flags(np, "atmel,vbus-gpio", i, &flags);
535 pdata->vbus_pin[i] = gpio;
536 if (!gpio_is_valid(gpio))
537 continue;
538 pdata->vbus_pin_active_low[i] = flags & OF_GPIO_ACTIVE_LOW;
Jean-Christophe PLAGNIOL-VILLARD24197302011-11-21 06:55:18 +0800539 }
540
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100541 at91_for_each_port(i)
Nicolas Ferreaaf9f5f2012-03-21 16:58:11 +0100542 pdata->overcurrent_pin[i] =
543 of_get_named_gpio_flags(np, "atmel,oc-gpio", i, &flags);
Jean-Christophe PLAGNIOL-VILLARD24197302011-11-21 06:55:18 +0800544
545 pdev->dev.platform_data = pdata;
546
547 return 0;
548}
549#else
550static int __devinit ohci_at91_of_init(struct platform_device *pdev)
551{
552 return 0;
553}
554#endif
555
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200556/*-------------------------------------------------------------------------*/
557
Nicolas Ferreb548a272012-04-06 14:35:38 +0200558static int __devinit ohci_hcd_at91_drv_probe(struct platform_device *pdev)
Andrew Victor39a269c2006-01-22 10:32:13 -0800559{
Jean-Christophe PLAGNIOL-VILLARD24197302011-11-21 06:55:18 +0800560 struct at91_usbh_data *pdata;
David Brownell4bde4a42007-12-27 11:19:49 -0800561 int i;
Nicolas Ferreaaf9f5f2012-03-21 16:58:11 +0100562 int gpio;
563 int ret;
David Brownell4bde4a42007-12-27 11:19:49 -0800564
Nicolas Ferre1887ab2b2012-03-28 11:49:01 +0200565 ret = ohci_at91_of_init(pdev);
566 if (ret)
567 return ret;
Jean-Christophe PLAGNIOL-VILLARD24197302011-11-21 06:55:18 +0800568
569 pdata = pdev->dev.platform_data;
570
David Brownell4bde4a42007-12-27 11:19:49 -0800571 if (pdata) {
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100572 at91_for_each_port(i) {
Nicolas Ferre6fffb772012-08-29 11:49:18 +0200573 /*
574 * do not configure PIO if not in relation with
575 * real USB port on board
576 */
577 if (i >= pdata->ports) {
578 pdata->vbus_pin[i] = -EINVAL;
579 pdata->overcurrent_pin[i] = -EINVAL;
580 break;
581 }
582
Jean-Christophe PLAGNIOL-VILLARD8a7a49d2011-09-19 15:32:23 +0800583 if (!gpio_is_valid(pdata->vbus_pin[i]))
David Brownell4bde4a42007-12-27 11:19:49 -0800584 continue;
Nicolas Ferreaaf9f5f2012-03-21 16:58:11 +0100585 gpio = pdata->vbus_pin[i];
586
587 ret = gpio_request(gpio, "ohci_vbus");
588 if (ret) {
589 dev_err(&pdev->dev,
590 "can't request vbus gpio %d\n", gpio);
591 continue;
592 }
593 ret = gpio_direction_output(gpio,
594 !pdata->vbus_pin_active_low[i]);
595 if (ret) {
596 dev_err(&pdev->dev,
597 "can't put vbus gpio %d as output %d\n",
598 gpio, !pdata->vbus_pin_active_low[i]);
599 gpio_free(gpio);
600 continue;
601 }
602
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200603 ohci_at91_usb_set_power(pdata, i, 1);
604 }
605
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100606 at91_for_each_port(i) {
Jean-Christophe PLAGNIOL-VILLARD8a7a49d2011-09-19 15:32:23 +0800607 if (!gpio_is_valid(pdata->overcurrent_pin[i]))
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200608 continue;
Nicolas Ferreaaf9f5f2012-03-21 16:58:11 +0100609 gpio = pdata->overcurrent_pin[i];
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200610
Nicolas Ferreaaf9f5f2012-03-21 16:58:11 +0100611 ret = gpio_request(gpio, "ohci_overcurrent");
612 if (ret) {
613 dev_err(&pdev->dev,
614 "can't request overcurrent gpio %d\n",
615 gpio);
616 continue;
617 }
618
619 ret = gpio_direction_input(gpio);
620 if (ret) {
621 dev_err(&pdev->dev,
622 "can't configure overcurrent gpio %d as input\n",
623 gpio);
624 gpio_free(gpio);
625 continue;
626 }
627
628 ret = request_irq(gpio_to_irq(gpio),
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200629 ohci_hcd_at91_overcurrent_irq,
630 IRQF_SHARED, "ohci_overcurrent", pdev);
631 if (ret) {
Nicolas Ferreaaf9f5f2012-03-21 16:58:11 +0100632 gpio_free(gpio);
633 dev_err(&pdev->dev,
634 "can't get gpio IRQ for overcurrent\n");
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200635 }
David Brownell4bde4a42007-12-27 11:19:49 -0800636 }
637 }
638
David Brownell0365ee02006-06-19 14:27:20 -0700639 device_init_wakeup(&pdev->dev, 1);
640 return usb_hcd_at91_probe(&ohci_at91_hc_driver, pdev);
Andrew Victor39a269c2006-01-22 10:32:13 -0800641}
642
Nicolas Ferreb548a272012-04-06 14:35:38 +0200643static int __devexit ohci_hcd_at91_drv_remove(struct platform_device *pdev)
Andrew Victor39a269c2006-01-22 10:32:13 -0800644{
David Brownell4bde4a42007-12-27 11:19:49 -0800645 struct at91_usbh_data *pdata = pdev->dev.platform_data;
646 int i;
647
648 if (pdata) {
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100649 at91_for_each_port(i) {
Jean-Christophe PLAGNIOL-VILLARD8a7a49d2011-09-19 15:32:23 +0800650 if (!gpio_is_valid(pdata->vbus_pin[i]))
David Brownell4bde4a42007-12-27 11:19:49 -0800651 continue;
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200652 ohci_at91_usb_set_power(pdata, i, 0);
David Brownell4bde4a42007-12-27 11:19:49 -0800653 gpio_free(pdata->vbus_pin[i]);
654 }
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200655
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100656 at91_for_each_port(i) {
Jean-Christophe PLAGNIOL-VILLARD8a7a49d2011-09-19 15:32:23 +0800657 if (!gpio_is_valid(pdata->overcurrent_pin[i]))
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200658 continue;
659 free_irq(gpio_to_irq(pdata->overcurrent_pin[i]), pdev);
660 gpio_free(pdata->overcurrent_pin[i]);
661 }
David Brownell4bde4a42007-12-27 11:19:49 -0800662 }
663
David Brownell0365ee02006-06-19 14:27:20 -0700664 device_init_wakeup(&pdev->dev, 0);
Pete Zaitcev421b4bf2008-06-01 14:38:43 -0700665 usb_hcd_at91_remove(platform_get_drvdata(pdev), pdev);
666 return 0;
Andrew Victor39a269c2006-01-22 10:32:13 -0800667}
668
669#ifdef CONFIG_PM
Andrew Victor39a269c2006-01-22 10:32:13 -0800670
David Brownell68ba61b2006-04-02 20:26:21 -0800671static int
David Brownell0365ee02006-06-19 14:27:20 -0700672ohci_hcd_at91_drv_suspend(struct platform_device *pdev, pm_message_t mesg)
David Brownell68ba61b2006-04-02 20:26:21 -0800673{
David Brownell0365ee02006-06-19 14:27:20 -0700674 struct usb_hcd *hcd = platform_get_drvdata(pdev);
675 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
676
677 if (device_may_wakeup(&pdev->dev))
678 enable_irq_wake(hcd->irq);
David Brownell0365ee02006-06-19 14:27:20 -0700679
680 /*
681 * The integrated transceivers seem unable to notice disconnect,
682 * reconnect, or wakeup without the 48 MHz clock active. so for
683 * correctness, always discard connection state (using reset).
684 *
685 * REVISIT: some boards will be able to turn VBUS off...
686 */
687 if (at91_suspend_entering_slow_clock()) {
688 ohci_usb_reset (ohci);
Patrice Vilchez869aa982010-04-28 13:45:40 +0200689 /* flush the writes */
690 (void) ohci_readl (ohci, &ohci->regs->control);
Andrew Victored077bb2007-02-16 10:18:58 -0800691 at91_stop_clock();
David Brownell0365ee02006-06-19 14:27:20 -0700692 }
Andrew Victor39a269c2006-01-22 10:32:13 -0800693
694 return 0;
695}
696
David Brownell0365ee02006-06-19 14:27:20 -0700697static int ohci_hcd_at91_drv_resume(struct platform_device *pdev)
Andrew Victor39a269c2006-01-22 10:32:13 -0800698{
Marc Pignat6dde8962007-01-09 14:00:11 -0800699 struct usb_hcd *hcd = platform_get_drvdata(pdev);
700
701 if (device_may_wakeup(&pdev->dev))
702 disable_irq_wake(hcd->irq);
703
Andrew Victored077bb2007-02-16 10:18:58 -0800704 if (!clocked)
705 at91_start_clock();
Andrew Victor39a269c2006-01-22 10:32:13 -0800706
Alan Stern43bbb7e2008-04-03 18:03:17 -0400707 ohci_finish_controller_resume(hcd);
Andrew Victor39a269c2006-01-22 10:32:13 -0800708 return 0;
709}
710#else
711#define ohci_hcd_at91_drv_suspend NULL
712#define ohci_hcd_at91_drv_resume NULL
713#endif
714
Kay Sieversf4fce612008-04-10 21:29:22 -0700715MODULE_ALIAS("platform:at91_ohci");
David Brownell68ba61b2006-04-02 20:26:21 -0800716
Andrew Victor39a269c2006-01-22 10:32:13 -0800717static struct platform_driver ohci_hcd_at91_driver = {
718 .probe = ohci_hcd_at91_drv_probe,
Nicolas Ferreb548a272012-04-06 14:35:38 +0200719 .remove = __devexit_p(ohci_hcd_at91_drv_remove),
Aleksey Gorelov64a21d02006-08-08 17:24:08 -0700720 .shutdown = usb_hcd_platform_shutdown,
Andrew Victor39a269c2006-01-22 10:32:13 -0800721 .suspend = ohci_hcd_at91_drv_suspend,
722 .resume = ohci_hcd_at91_drv_resume,
723 .driver = {
David Brownell0365ee02006-06-19 14:27:20 -0700724 .name = "at91_ohci",
Andrew Victor39a269c2006-01-22 10:32:13 -0800725 .owner = THIS_MODULE,
Jean-Christophe PLAGNIOL-VILLARD24197302011-11-21 06:55:18 +0800726 .of_match_table = of_match_ptr(at91_ohci_dt_ids),
Andrew Victor39a269c2006-01-22 10:32:13 -0800727 },
728};