blob: 09f597ad6e00ad739ab4e0924800a0c81e0abbfc [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
Pete Zaitcev421b4bf2008-06-01 14:38:43 -070097static void 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 */
David Brownell0365ee02006-06-19 14:27:20 -0700111static int usb_hcd_at91_probe(const struct hc_driver *driver,
112 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;
132 hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
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");
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 */
Pete Zaitcev421b4bf2008-06-01 14:38:43 -0700206static void 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
226ohci_at91_start (struct usb_hcd *hcd)
227{
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;
David Brownell0365ee02006-06-19 14:27:20 -0700236
Andrew Victor39a269c2006-01-22 10:32:13 -0800237 if ((ret = ohci_run(ohci)) < 0) {
238 err("can't start %s", hcd->self.bus_name);
239 ohci_stop(hcd);
240 return ret;
241 }
Andrew Victor39a269c2006-01-22 10:32:13 -0800242 return 0;
243}
244
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200245static void ohci_at91_usb_set_power(struct at91_usbh_data *pdata, int port, int enable)
246{
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100247 if (!valid_port(port))
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200248 return;
249
Jean-Christophe PLAGNIOL-VILLARD8a7a49d2011-09-19 15:32:23 +0800250 if (!gpio_is_valid(pdata->vbus_pin[port]))
Jean-Christophe PLAGNIOL-VILLARD770f0ba2011-11-12 16:46:13 +0100251 return;
252
Jean-Christophe PLAGNIOL-VILLARD8134ff52011-12-08 16:32:01 +0100253 gpio_set_value(pdata->vbus_pin[port],
Nicolas Ferre1e7caf82012-03-21 14:38:55 +0100254 pdata->vbus_pin_active_low[port] ^ enable);
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200255}
256
257static int ohci_at91_usb_get_power(struct at91_usbh_data *pdata, int port)
258{
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100259 if (!valid_port(port))
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200260 return -EINVAL;
261
Jean-Christophe PLAGNIOL-VILLARD8a7a49d2011-09-19 15:32:23 +0800262 if (!gpio_is_valid(pdata->vbus_pin[port]))
Jean-Christophe PLAGNIOL-VILLARD770f0ba2011-11-12 16:46:13 +0100263 return -EINVAL;
264
Jean-Christophe PLAGNIOL-VILLARD8134ff52011-12-08 16:32:01 +0100265 return gpio_get_value(pdata->vbus_pin[port]) ^
Nicolas Ferre1e7caf82012-03-21 14:38:55 +0100266 pdata->vbus_pin_active_low[port];
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200267}
268
269/*
270 * Update the status data from the hub with the over-current indicator change.
271 */
272static int ohci_at91_hub_status_data(struct usb_hcd *hcd, char *buf)
273{
274 struct at91_usbh_data *pdata = hcd->self.controller->platform_data;
275 int length = ohci_hub_status_data(hcd, buf);
276 int port;
277
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100278 at91_for_each_port(port) {
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200279 if (pdata->overcurrent_changed[port]) {
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100280 if (!length)
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200281 length = 1;
282 buf[0] |= 1 << (port + 1);
283 }
284 }
285
286 return length;
287}
288
289/*
290 * Look at the control requests to the root hub and see if we need to override.
291 */
292static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
293 u16 wIndex, char *buf, u16 wLength)
294{
295 struct at91_usbh_data *pdata = hcd->self.controller->platform_data;
296 struct usb_hub_descriptor *desc;
297 int ret = -EINVAL;
298 u32 *data = (u32 *)buf;
299
300 dev_dbg(hcd->self.controller,
301 "ohci_at91_hub_control(%p,0x%04x,0x%04x,0x%04x,%p,%04x)\n",
302 hcd, typeReq, wValue, wIndex, buf, wLength);
303
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100304 wIndex--;
305
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200306 switch (typeReq) {
307 case SetPortFeature:
308 if (wValue == USB_PORT_FEAT_POWER) {
309 dev_dbg(hcd->self.controller, "SetPortFeat: POWER\n");
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100310 if (valid_port(wIndex)) {
311 ohci_at91_usb_set_power(pdata, wIndex, 1);
312 ret = 0;
313 }
314
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200315 goto out;
316 }
317 break;
318
319 case ClearPortFeature:
320 switch (wValue) {
321 case USB_PORT_FEAT_C_OVER_CURRENT:
322 dev_dbg(hcd->self.controller,
323 "ClearPortFeature: C_OVER_CURRENT\n");
324
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100325 if (valid_port(wIndex)) {
326 pdata->overcurrent_changed[wIndex] = 0;
327 pdata->overcurrent_status[wIndex] = 0;
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200328 }
329
330 goto out;
331
332 case USB_PORT_FEAT_OVER_CURRENT:
333 dev_dbg(hcd->self.controller,
334 "ClearPortFeature: OVER_CURRENT\n");
335
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100336 if (valid_port(wIndex))
337 pdata->overcurrent_status[wIndex] = 0;
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200338
339 goto out;
340
341 case USB_PORT_FEAT_POWER:
342 dev_dbg(hcd->self.controller,
343 "ClearPortFeature: POWER\n");
344
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100345 if (valid_port(wIndex)) {
346 ohci_at91_usb_set_power(pdata, wIndex, 0);
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200347 return 0;
348 }
349 }
350 break;
351 }
352
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100353 ret = ohci_hub_control(hcd, typeReq, wValue, wIndex + 1, buf, wLength);
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200354 if (ret)
355 goto out;
356
357 switch (typeReq) {
358 case GetHubDescriptor:
359
360 /* update the hub's descriptor */
361
362 desc = (struct usb_hub_descriptor *)buf;
363
364 dev_dbg(hcd->self.controller, "wHubCharacteristics 0x%04x\n",
365 desc->wHubCharacteristics);
366
367 /* remove the old configurations for power-switching, and
368 * over-current protection, and insert our new configuration
369 */
370
371 desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_LPSM);
372 desc->wHubCharacteristics |= cpu_to_le16(0x0001);
373
374 if (pdata->overcurrent_supported) {
375 desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_OCPM);
376 desc->wHubCharacteristics |= cpu_to_le16(0x0008|0x0001);
377 }
378
379 dev_dbg(hcd->self.controller, "wHubCharacteristics after 0x%04x\n",
380 desc->wHubCharacteristics);
381
382 return ret;
383
384 case GetPortStatus:
385 /* check port status */
386
387 dev_dbg(hcd->self.controller, "GetPortStatus(%d)\n", wIndex);
388
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100389 if (valid_port(wIndex)) {
390 if (!ohci_at91_usb_get_power(pdata, wIndex))
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200391 *data &= ~cpu_to_le32(RH_PS_PPS);
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200392
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100393 if (pdata->overcurrent_changed[wIndex])
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200394 *data |= cpu_to_le32(RH_PS_OCIC);
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200395
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100396 if (pdata->overcurrent_status[wIndex])
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200397 *data |= cpu_to_le32(RH_PS_POCI);
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200398 }
399 }
400
401 out:
402 return ret;
403}
404
Andrew Victor39a269c2006-01-22 10:32:13 -0800405/*-------------------------------------------------------------------------*/
406
407static const struct hc_driver ohci_at91_hc_driver = {
408 .description = hcd_name,
David Brownell0365ee02006-06-19 14:27:20 -0700409 .product_desc = "AT91 OHCI",
Andrew Victor39a269c2006-01-22 10:32:13 -0800410 .hcd_priv_size = sizeof(struct ohci_hcd),
411
412 /*
413 * generic hardware linkage
414 */
415 .irq = ohci_irq,
416 .flags = HCD_USB11 | HCD_MEMORY,
417
418 /*
419 * basic lifecycle operations
420 */
421 .start = ohci_at91_start,
422 .stop = ohci_stop,
David Brownelldd9048a2006-12-05 03:18:31 -0800423 .shutdown = ohci_shutdown,
Andrew Victor39a269c2006-01-22 10:32:13 -0800424
425 /*
426 * managing i/o requests and associated device resources
427 */
428 .urb_enqueue = ohci_urb_enqueue,
429 .urb_dequeue = ohci_urb_dequeue,
430 .endpoint_disable = ohci_endpoint_disable,
431
432 /*
433 * scheduling support
434 */
435 .get_frame_number = ohci_get_frame,
436
437 /*
438 * root hub support
439 */
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200440 .hub_status_data = ohci_at91_hub_status_data,
441 .hub_control = ohci_at91_hub_control,
Andrew Victor39a269c2006-01-22 10:32:13 -0800442#ifdef CONFIG_PM
David Brownell68ba61b2006-04-02 20:26:21 -0800443 .bus_suspend = ohci_bus_suspend,
444 .bus_resume = ohci_bus_resume,
Andrew Victor39a269c2006-01-22 10:32:13 -0800445#endif
446 .start_port_reset = ohci_start_port_reset,
447};
448
449/*-------------------------------------------------------------------------*/
450
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200451static irqreturn_t ohci_hcd_at91_overcurrent_irq(int irq, void *data)
452{
453 struct platform_device *pdev = data;
454 struct at91_usbh_data *pdata = pdev->dev.platform_data;
455 int val, gpio, port;
456
457 /* From the GPIO notifying the over-current situation, find
458 * out the corresponding port */
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100459 at91_for_each_port(port) {
Nicolas Ferree4499072012-02-11 14:23:06 +0100460 if (gpio_to_irq(pdata->overcurrent_pin[port]) == irq) {
461 gpio = pdata->overcurrent_pin[port];
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200462 break;
Nicolas Ferree4499072012-02-11 14:23:06 +0100463 }
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200464 }
465
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100466 if (port == AT91_MAX_USBH_PORTS) {
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200467 dev_err(& pdev->dev, "overcurrent interrupt from unknown GPIO\n");
468 return IRQ_HANDLED;
469 }
470
471 val = gpio_get_value(gpio);
472
473 /* When notified of an over-current situation, disable power
474 on the corresponding port, and mark this port in
475 over-current. */
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100476 if (!val) {
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200477 ohci_at91_usb_set_power(pdata, port, 0);
478 pdata->overcurrent_status[port] = 1;
479 pdata->overcurrent_changed[port] = 1;
480 }
481
482 dev_dbg(& pdev->dev, "overcurrent situation %s\n",
483 val ? "exited" : "notified");
484
485 return IRQ_HANDLED;
486}
487
Jean-Christophe PLAGNIOL-VILLARD24197302011-11-21 06:55:18 +0800488#ifdef CONFIG_OF
489static const struct of_device_id at91_ohci_dt_ids[] = {
490 { .compatible = "atmel,at91rm9200-ohci" },
491 { /* sentinel */ }
492};
493
494MODULE_DEVICE_TABLE(of, at91_ohci_dt_ids);
495
496static u64 at91_ohci_dma_mask = DMA_BIT_MASK(32);
497
498static int __devinit ohci_at91_of_init(struct platform_device *pdev)
499{
500 struct device_node *np = pdev->dev.of_node;
Nicolas Ferreaaf9f5f2012-03-21 16:58:11 +0100501 int i, gpio;
Jean-Christophe PLAGNIOL-VILLARD24197302011-11-21 06:55:18 +0800502 enum of_gpio_flags flags;
503 struct at91_usbh_data *pdata;
504 u32 ports;
505
506 if (!np)
507 return 0;
508
509 /* Right now device-tree probed devices don't get dma_mask set.
510 * Since shared usb code relies on it, set it here for now.
511 * Once we have dma capability bindings this can go away.
512 */
513 if (!pdev->dev.dma_mask)
514 pdev->dev.dma_mask = &at91_ohci_dma_mask;
515
516 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
517 if (!pdata)
518 return -ENOMEM;
519
520 if (!of_property_read_u32(np, "num-ports", &ports))
521 pdata->ports = ports;
522
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100523 at91_for_each_port(i) {
Jean-Christophe PLAGNIOL-VILLARD24197302011-11-21 06:55:18 +0800524 gpio = of_get_named_gpio_flags(np, "atmel,vbus-gpio", i, &flags);
525 pdata->vbus_pin[i] = gpio;
526 if (!gpio_is_valid(gpio))
527 continue;
528 pdata->vbus_pin_active_low[i] = flags & OF_GPIO_ACTIVE_LOW;
Jean-Christophe PLAGNIOL-VILLARD24197302011-11-21 06:55:18 +0800529 }
530
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100531 at91_for_each_port(i)
Nicolas Ferreaaf9f5f2012-03-21 16:58:11 +0100532 pdata->overcurrent_pin[i] =
533 of_get_named_gpio_flags(np, "atmel,oc-gpio", i, &flags);
Jean-Christophe PLAGNIOL-VILLARD24197302011-11-21 06:55:18 +0800534
535 pdev->dev.platform_data = pdata;
536
537 return 0;
538}
539#else
540static int __devinit ohci_at91_of_init(struct platform_device *pdev)
541{
542 return 0;
543}
544#endif
545
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200546/*-------------------------------------------------------------------------*/
547
David Brownell0365ee02006-06-19 14:27:20 -0700548static int ohci_hcd_at91_drv_probe(struct platform_device *pdev)
Andrew Victor39a269c2006-01-22 10:32:13 -0800549{
Jean-Christophe PLAGNIOL-VILLARD24197302011-11-21 06:55:18 +0800550 struct at91_usbh_data *pdata;
David Brownell4bde4a42007-12-27 11:19:49 -0800551 int i;
Nicolas Ferreaaf9f5f2012-03-21 16:58:11 +0100552 int gpio;
553 int ret;
David Brownell4bde4a42007-12-27 11:19:49 -0800554
Nicolas Ferre1887ab2b2012-03-28 11:49:01 +0200555 ret = ohci_at91_of_init(pdev);
556 if (ret)
557 return ret;
Jean-Christophe PLAGNIOL-VILLARD24197302011-11-21 06:55:18 +0800558
559 pdata = pdev->dev.platform_data;
560
David Brownell4bde4a42007-12-27 11:19:49 -0800561 if (pdata) {
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100562 at91_for_each_port(i) {
Jean-Christophe PLAGNIOL-VILLARD8a7a49d2011-09-19 15:32:23 +0800563 if (!gpio_is_valid(pdata->vbus_pin[i]))
David Brownell4bde4a42007-12-27 11:19:49 -0800564 continue;
Nicolas Ferreaaf9f5f2012-03-21 16:58:11 +0100565 gpio = pdata->vbus_pin[i];
566
567 ret = gpio_request(gpio, "ohci_vbus");
568 if (ret) {
569 dev_err(&pdev->dev,
570 "can't request vbus gpio %d\n", gpio);
571 continue;
572 }
573 ret = gpio_direction_output(gpio,
574 !pdata->vbus_pin_active_low[i]);
575 if (ret) {
576 dev_err(&pdev->dev,
577 "can't put vbus gpio %d as output %d\n",
578 gpio, !pdata->vbus_pin_active_low[i]);
579 gpio_free(gpio);
580 continue;
581 }
582
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200583 ohci_at91_usb_set_power(pdata, i, 1);
584 }
585
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100586 at91_for_each_port(i) {
Jean-Christophe PLAGNIOL-VILLARD8a7a49d2011-09-19 15:32:23 +0800587 if (!gpio_is_valid(pdata->overcurrent_pin[i]))
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200588 continue;
Nicolas Ferreaaf9f5f2012-03-21 16:58:11 +0100589 gpio = pdata->overcurrent_pin[i];
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200590
Nicolas Ferreaaf9f5f2012-03-21 16:58:11 +0100591 ret = gpio_request(gpio, "ohci_overcurrent");
592 if (ret) {
593 dev_err(&pdev->dev,
594 "can't request overcurrent gpio %d\n",
595 gpio);
596 continue;
597 }
598
599 ret = gpio_direction_input(gpio);
600 if (ret) {
601 dev_err(&pdev->dev,
602 "can't configure overcurrent gpio %d as input\n",
603 gpio);
604 gpio_free(gpio);
605 continue;
606 }
607
608 ret = request_irq(gpio_to_irq(gpio),
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200609 ohci_hcd_at91_overcurrent_irq,
610 IRQF_SHARED, "ohci_overcurrent", pdev);
611 if (ret) {
Nicolas Ferreaaf9f5f2012-03-21 16:58:11 +0100612 gpio_free(gpio);
613 dev_err(&pdev->dev,
614 "can't get gpio IRQ for overcurrent\n");
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200615 }
David Brownell4bde4a42007-12-27 11:19:49 -0800616 }
617 }
618
David Brownell0365ee02006-06-19 14:27:20 -0700619 device_init_wakeup(&pdev->dev, 1);
620 return usb_hcd_at91_probe(&ohci_at91_hc_driver, pdev);
Andrew Victor39a269c2006-01-22 10:32:13 -0800621}
622
David Brownell0365ee02006-06-19 14:27:20 -0700623static int ohci_hcd_at91_drv_remove(struct platform_device *pdev)
Andrew Victor39a269c2006-01-22 10:32:13 -0800624{
David Brownell4bde4a42007-12-27 11:19:49 -0800625 struct at91_usbh_data *pdata = pdev->dev.platform_data;
626 int i;
627
628 if (pdata) {
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100629 at91_for_each_port(i) {
Jean-Christophe PLAGNIOL-VILLARD8a7a49d2011-09-19 15:32:23 +0800630 if (!gpio_is_valid(pdata->vbus_pin[i]))
David Brownell4bde4a42007-12-27 11:19:49 -0800631 continue;
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200632 ohci_at91_usb_set_power(pdata, i, 0);
David Brownell4bde4a42007-12-27 11:19:49 -0800633 gpio_free(pdata->vbus_pin[i]);
634 }
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200635
Nicolas Ferre0ee6d1e2012-03-21 16:53:09 +0100636 at91_for_each_port(i) {
Jean-Christophe PLAGNIOL-VILLARD8a7a49d2011-09-19 15:32:23 +0800637 if (!gpio_is_valid(pdata->overcurrent_pin[i]))
Thomas Petazzoniaa6e52a2011-07-13 11:29:17 +0200638 continue;
639 free_irq(gpio_to_irq(pdata->overcurrent_pin[i]), pdev);
640 gpio_free(pdata->overcurrent_pin[i]);
641 }
David Brownell4bde4a42007-12-27 11:19:49 -0800642 }
643
David Brownell0365ee02006-06-19 14:27:20 -0700644 device_init_wakeup(&pdev->dev, 0);
Pete Zaitcev421b4bf2008-06-01 14:38:43 -0700645 usb_hcd_at91_remove(platform_get_drvdata(pdev), pdev);
646 return 0;
Andrew Victor39a269c2006-01-22 10:32:13 -0800647}
648
649#ifdef CONFIG_PM
Andrew Victor39a269c2006-01-22 10:32:13 -0800650
David Brownell68ba61b2006-04-02 20:26:21 -0800651static int
David Brownell0365ee02006-06-19 14:27:20 -0700652ohci_hcd_at91_drv_suspend(struct platform_device *pdev, pm_message_t mesg)
David Brownell68ba61b2006-04-02 20:26:21 -0800653{
David Brownell0365ee02006-06-19 14:27:20 -0700654 struct usb_hcd *hcd = platform_get_drvdata(pdev);
655 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
656
657 if (device_may_wakeup(&pdev->dev))
658 enable_irq_wake(hcd->irq);
David Brownell0365ee02006-06-19 14:27:20 -0700659
660 /*
661 * The integrated transceivers seem unable to notice disconnect,
662 * reconnect, or wakeup without the 48 MHz clock active. so for
663 * correctness, always discard connection state (using reset).
664 *
665 * REVISIT: some boards will be able to turn VBUS off...
666 */
667 if (at91_suspend_entering_slow_clock()) {
668 ohci_usb_reset (ohci);
Patrice Vilchez869aa982010-04-28 13:45:40 +0200669 /* flush the writes */
670 (void) ohci_readl (ohci, &ohci->regs->control);
Andrew Victored077bb2007-02-16 10:18:58 -0800671 at91_stop_clock();
David Brownell0365ee02006-06-19 14:27:20 -0700672 }
Andrew Victor39a269c2006-01-22 10:32:13 -0800673
674 return 0;
675}
676
David Brownell0365ee02006-06-19 14:27:20 -0700677static int ohci_hcd_at91_drv_resume(struct platform_device *pdev)
Andrew Victor39a269c2006-01-22 10:32:13 -0800678{
Marc Pignat6dde8962007-01-09 14:00:11 -0800679 struct usb_hcd *hcd = platform_get_drvdata(pdev);
680
681 if (device_may_wakeup(&pdev->dev))
682 disable_irq_wake(hcd->irq);
683
Andrew Victored077bb2007-02-16 10:18:58 -0800684 if (!clocked)
685 at91_start_clock();
Andrew Victor39a269c2006-01-22 10:32:13 -0800686
Alan Stern43bbb7e2008-04-03 18:03:17 -0400687 ohci_finish_controller_resume(hcd);
Andrew Victor39a269c2006-01-22 10:32:13 -0800688 return 0;
689}
690#else
691#define ohci_hcd_at91_drv_suspend NULL
692#define ohci_hcd_at91_drv_resume NULL
693#endif
694
Kay Sieversf4fce612008-04-10 21:29:22 -0700695MODULE_ALIAS("platform:at91_ohci");
David Brownell68ba61b2006-04-02 20:26:21 -0800696
Andrew Victor39a269c2006-01-22 10:32:13 -0800697static struct platform_driver ohci_hcd_at91_driver = {
698 .probe = ohci_hcd_at91_drv_probe,
699 .remove = ohci_hcd_at91_drv_remove,
Aleksey Gorelov64a21d02006-08-08 17:24:08 -0700700 .shutdown = usb_hcd_platform_shutdown,
Andrew Victor39a269c2006-01-22 10:32:13 -0800701 .suspend = ohci_hcd_at91_drv_suspend,
702 .resume = ohci_hcd_at91_drv_resume,
703 .driver = {
David Brownell0365ee02006-06-19 14:27:20 -0700704 .name = "at91_ohci",
Andrew Victor39a269c2006-01-22 10:32:13 -0800705 .owner = THIS_MODULE,
Jean-Christophe PLAGNIOL-VILLARD24197302011-11-21 06:55:18 +0800706 .of_match_table = of_match_ptr(at91_ohci_dt_ids),
Andrew Victor39a269c2006-01-22 10:32:13 -0800707 },
708};