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Commit | Line | Data |
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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); |
3c9740a1 PC |
203 | if (retval == 0) { |
204 | device_wakeup_enable(hcd->self.controller); | |
39a269c0 | 205 | return retval; |
3c9740a1 | 206 | } |
39a269c0 AV |
207 | |
208 | /* Error handling */ | |
209 | at91_stop_hc(pdev); | |
210 | ||
6b0a1cf7 BB |
211 | if (IS_ENABLED(CONFIG_COMMON_CLK)) |
212 | clk_put(uclk); | |
213 | err6: | |
0af4316b | 214 | clk_put(hclk); |
6813463c | 215 | err5: |
39a269c0 | 216 | clk_put(fclk); |
6813463c | 217 | err4: |
39a269c0 AV |
218 | clk_put(iclk); |
219 | ||
6813463c | 220 | err3: |
39a269c0 AV |
221 | iounmap(hcd->regs); |
222 | ||
223 | err2: | |
224 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
225 | ||
226 | err1: | |
227 | usb_put_hcd(hcd); | |
228 | return retval; | |
229 | } | |
230 | ||
231 | ||
39a269c0 AV |
232 | /* may be called with controller, bus, and devices active */ |
233 | ||
234 | /** | |
0365ee0a | 235 | * usb_hcd_at91_remove - shutdown processing for AT91-based HCDs |
39a269c0 AV |
236 | * @dev: USB Host Controller being removed |
237 | * Context: !in_interrupt() | |
238 | * | |
239 | * Reverses the effect of usb_hcd_at91_probe(), first invoking | |
240 | * the HCD's stop() method. It is always called from a thread | |
0365ee0a | 241 | * context, "rmmod" or something similar. |
39a269c0 AV |
242 | * |
243 | */ | |
fb4e98ab | 244 | static void usb_hcd_at91_remove(struct usb_hcd *hcd, |
0365ee0a | 245 | struct platform_device *pdev) |
39a269c0 AV |
246 | { |
247 | usb_remove_hcd(hcd); | |
248 | at91_stop_hc(pdev); | |
249 | iounmap(hcd->regs); | |
68ba61b8 | 250 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
421b4bf5 | 251 | usb_put_hcd(hcd); |
39a269c0 | 252 | |
6b0a1cf7 BB |
253 | if (IS_ENABLED(CONFIG_COMMON_CLK)) |
254 | clk_put(uclk); | |
0af4316b | 255 | clk_put(hclk); |
68ba61b8 DB |
256 | clk_put(fclk); |
257 | clk_put(iclk); | |
ed077bb7 | 258 | fclk = iclk = hclk = NULL; |
39a269c0 AV |
259 | } |
260 | ||
261 | /*-------------------------------------------------------------------------*/ | |
aa6e52a3 TP |
262 | static void ohci_at91_usb_set_power(struct at91_usbh_data *pdata, int port, int enable) |
263 | { | |
0ee6d1ee | 264 | if (!valid_port(port)) |
aa6e52a3 TP |
265 | return; |
266 | ||
8a7a49d1 | 267 | if (!gpio_is_valid(pdata->vbus_pin[port])) |
770f0baa JCPV |
268 | return; |
269 | ||
8134ff55 | 270 | gpio_set_value(pdata->vbus_pin[port], |
1e7caf8b | 271 | pdata->vbus_pin_active_low[port] ^ enable); |
aa6e52a3 TP |
272 | } |
273 | ||
274 | static int ohci_at91_usb_get_power(struct at91_usbh_data *pdata, int port) | |
275 | { | |
0ee6d1ee | 276 | if (!valid_port(port)) |
aa6e52a3 TP |
277 | return -EINVAL; |
278 | ||
8a7a49d1 | 279 | if (!gpio_is_valid(pdata->vbus_pin[port])) |
770f0baa JCPV |
280 | return -EINVAL; |
281 | ||
8134ff55 | 282 | return gpio_get_value(pdata->vbus_pin[port]) ^ |
1e7caf8b | 283 | pdata->vbus_pin_active_low[port]; |
aa6e52a3 TP |
284 | } |
285 | ||
286 | /* | |
287 | * Update the status data from the hub with the over-current indicator change. | |
288 | */ | |
289 | static int ohci_at91_hub_status_data(struct usb_hcd *hcd, char *buf) | |
290 | { | |
e3825b48 MG |
291 | struct at91_usbh_data *pdata = hcd->self.controller->platform_data; |
292 | int length = orig_ohci_hub_status_data(hcd, buf); | |
aa6e52a3 TP |
293 | int port; |
294 | ||
0ee6d1ee | 295 | at91_for_each_port(port) { |
aa6e52a3 | 296 | if (pdata->overcurrent_changed[port]) { |
0ee6d1ee | 297 | if (!length) |
aa6e52a3 TP |
298 | length = 1; |
299 | buf[0] |= 1 << (port + 1); | |
300 | } | |
301 | } | |
302 | ||
303 | return length; | |
304 | } | |
305 | ||
306 | /* | |
307 | * Look at the control requests to the root hub and see if we need to override. | |
308 | */ | |
309 | static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, | |
310 | u16 wIndex, char *buf, u16 wLength) | |
311 | { | |
d4f09e28 | 312 | struct at91_usbh_data *pdata = dev_get_platdata(hcd->self.controller); |
aa6e52a3 TP |
313 | struct usb_hub_descriptor *desc; |
314 | int ret = -EINVAL; | |
315 | u32 *data = (u32 *)buf; | |
316 | ||
317 | dev_dbg(hcd->self.controller, | |
318 | "ohci_at91_hub_control(%p,0x%04x,0x%04x,0x%04x,%p,%04x)\n", | |
319 | hcd, typeReq, wValue, wIndex, buf, wLength); | |
320 | ||
0ee6d1ee NF |
321 | wIndex--; |
322 | ||
aa6e52a3 TP |
323 | switch (typeReq) { |
324 | case SetPortFeature: | |
325 | if (wValue == USB_PORT_FEAT_POWER) { | |
326 | dev_dbg(hcd->self.controller, "SetPortFeat: POWER\n"); | |
0ee6d1ee NF |
327 | if (valid_port(wIndex)) { |
328 | ohci_at91_usb_set_power(pdata, wIndex, 1); | |
329 | ret = 0; | |
330 | } | |
331 | ||
aa6e52a3 TP |
332 | goto out; |
333 | } | |
334 | break; | |
335 | ||
336 | case ClearPortFeature: | |
337 | switch (wValue) { | |
338 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
339 | dev_dbg(hcd->self.controller, | |
340 | "ClearPortFeature: C_OVER_CURRENT\n"); | |
341 | ||
0ee6d1ee NF |
342 | if (valid_port(wIndex)) { |
343 | pdata->overcurrent_changed[wIndex] = 0; | |
344 | pdata->overcurrent_status[wIndex] = 0; | |
aa6e52a3 TP |
345 | } |
346 | ||
347 | goto out; | |
348 | ||
349 | case USB_PORT_FEAT_OVER_CURRENT: | |
350 | dev_dbg(hcd->self.controller, | |
351 | "ClearPortFeature: OVER_CURRENT\n"); | |
352 | ||
0ee6d1ee NF |
353 | if (valid_port(wIndex)) |
354 | pdata->overcurrent_status[wIndex] = 0; | |
aa6e52a3 TP |
355 | |
356 | goto out; | |
357 | ||
358 | case USB_PORT_FEAT_POWER: | |
359 | dev_dbg(hcd->self.controller, | |
360 | "ClearPortFeature: POWER\n"); | |
361 | ||
0ee6d1ee NF |
362 | if (valid_port(wIndex)) { |
363 | ohci_at91_usb_set_power(pdata, wIndex, 0); | |
aa6e52a3 TP |
364 | return 0; |
365 | } | |
366 | } | |
367 | break; | |
368 | } | |
369 | ||
e3825b48 MG |
370 | ret = orig_ohci_hub_control(hcd, typeReq, wValue, wIndex + 1, |
371 | buf, wLength); | |
aa6e52a3 TP |
372 | if (ret) |
373 | goto out; | |
374 | ||
375 | switch (typeReq) { | |
376 | case GetHubDescriptor: | |
377 | ||
378 | /* update the hub's descriptor */ | |
379 | ||
380 | desc = (struct usb_hub_descriptor *)buf; | |
381 | ||
382 | dev_dbg(hcd->self.controller, "wHubCharacteristics 0x%04x\n", | |
383 | desc->wHubCharacteristics); | |
384 | ||
385 | /* remove the old configurations for power-switching, and | |
386 | * over-current protection, and insert our new configuration | |
387 | */ | |
388 | ||
389 | desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_LPSM); | |
390 | desc->wHubCharacteristics |= cpu_to_le16(0x0001); | |
391 | ||
392 | if (pdata->overcurrent_supported) { | |
393 | desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_OCPM); | |
394 | desc->wHubCharacteristics |= cpu_to_le16(0x0008|0x0001); | |
395 | } | |
396 | ||
397 | dev_dbg(hcd->self.controller, "wHubCharacteristics after 0x%04x\n", | |
398 | desc->wHubCharacteristics); | |
399 | ||
400 | return ret; | |
401 | ||
402 | case GetPortStatus: | |
403 | /* check port status */ | |
404 | ||
405 | dev_dbg(hcd->self.controller, "GetPortStatus(%d)\n", wIndex); | |
406 | ||
0ee6d1ee NF |
407 | if (valid_port(wIndex)) { |
408 | if (!ohci_at91_usb_get_power(pdata, wIndex)) | |
aa6e52a3 | 409 | *data &= ~cpu_to_le32(RH_PS_PPS); |
aa6e52a3 | 410 | |
0ee6d1ee | 411 | if (pdata->overcurrent_changed[wIndex]) |
aa6e52a3 | 412 | *data |= cpu_to_le32(RH_PS_OCIC); |
aa6e52a3 | 413 | |
0ee6d1ee | 414 | if (pdata->overcurrent_status[wIndex]) |
aa6e52a3 | 415 | *data |= cpu_to_le32(RH_PS_POCI); |
aa6e52a3 TP |
416 | } |
417 | } | |
418 | ||
419 | out: | |
420 | return ret; | |
421 | } | |
422 | ||
39a269c0 AV |
423 | /*-------------------------------------------------------------------------*/ |
424 | ||
aa6e52a3 TP |
425 | static irqreturn_t ohci_hcd_at91_overcurrent_irq(int irq, void *data) |
426 | { | |
427 | struct platform_device *pdev = data; | |
d4f09e28 | 428 | struct at91_usbh_data *pdata = dev_get_platdata(&pdev->dev); |
aa6e52a3 TP |
429 | int val, gpio, port; |
430 | ||
431 | /* From the GPIO notifying the over-current situation, find | |
432 | * out the corresponding port */ | |
0ee6d1ee | 433 | at91_for_each_port(port) { |
01bb6501 JE |
434 | if (gpio_is_valid(pdata->overcurrent_pin[port]) && |
435 | gpio_to_irq(pdata->overcurrent_pin[port]) == irq) { | |
e4499079 | 436 | gpio = pdata->overcurrent_pin[port]; |
aa6e52a3 | 437 | break; |
e4499079 | 438 | } |
aa6e52a3 TP |
439 | } |
440 | ||
0ee6d1ee | 441 | if (port == AT91_MAX_USBH_PORTS) { |
aa6e52a3 TP |
442 | dev_err(& pdev->dev, "overcurrent interrupt from unknown GPIO\n"); |
443 | return IRQ_HANDLED; | |
444 | } | |
445 | ||
446 | val = gpio_get_value(gpio); | |
447 | ||
448 | /* When notified of an over-current situation, disable power | |
449 | on the corresponding port, and mark this port in | |
450 | over-current. */ | |
0ee6d1ee | 451 | if (!val) { |
aa6e52a3 TP |
452 | ohci_at91_usb_set_power(pdata, port, 0); |
453 | pdata->overcurrent_status[port] = 1; | |
454 | pdata->overcurrent_changed[port] = 1; | |
455 | } | |
456 | ||
457 | dev_dbg(& pdev->dev, "overcurrent situation %s\n", | |
458 | val ? "exited" : "notified"); | |
459 | ||
460 | return IRQ_HANDLED; | |
461 | } | |
462 | ||
2419730f JCPV |
463 | #ifdef CONFIG_OF |
464 | static const struct of_device_id at91_ohci_dt_ids[] = { | |
465 | { .compatible = "atmel,at91rm9200-ohci" }, | |
466 | { /* sentinel */ } | |
467 | }; | |
468 | ||
469 | MODULE_DEVICE_TABLE(of, at91_ohci_dt_ids); | |
470 | ||
41ac7b3a | 471 | static int ohci_at91_of_init(struct platform_device *pdev) |
2419730f JCPV |
472 | { |
473 | struct device_node *np = pdev->dev.of_node; | |
22d9d8e8 | 474 | int i, gpio, ret; |
2419730f JCPV |
475 | enum of_gpio_flags flags; |
476 | struct at91_usbh_data *pdata; | |
477 | u32 ports; | |
478 | ||
479 | if (!np) | |
480 | return 0; | |
481 | ||
482 | /* Right now device-tree probed devices don't get dma_mask set. | |
483 | * Since shared usb code relies on it, set it here for now. | |
484 | * Once we have dma capability bindings this can go away. | |
485 | */ | |
e1fd7341 | 486 | ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); |
22d9d8e8 RK |
487 | if (ret) |
488 | return ret; | |
2419730f JCPV |
489 | |
490 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); | |
491 | if (!pdata) | |
492 | return -ENOMEM; | |
493 | ||
494 | if (!of_property_read_u32(np, "num-ports", &ports)) | |
495 | pdata->ports = ports; | |
496 | ||
0ee6d1ee | 497 | at91_for_each_port(i) { |
2419730f JCPV |
498 | gpio = of_get_named_gpio_flags(np, "atmel,vbus-gpio", i, &flags); |
499 | pdata->vbus_pin[i] = gpio; | |
500 | if (!gpio_is_valid(gpio)) | |
501 | continue; | |
502 | pdata->vbus_pin_active_low[i] = flags & OF_GPIO_ACTIVE_LOW; | |
2419730f JCPV |
503 | } |
504 | ||
0ee6d1ee | 505 | at91_for_each_port(i) |
aaf9f5fc NF |
506 | pdata->overcurrent_pin[i] = |
507 | of_get_named_gpio_flags(np, "atmel,oc-gpio", i, &flags); | |
2419730f JCPV |
508 | |
509 | pdev->dev.platform_data = pdata; | |
510 | ||
511 | return 0; | |
512 | } | |
513 | #else | |
41ac7b3a | 514 | static int ohci_at91_of_init(struct platform_device *pdev) |
2419730f JCPV |
515 | { |
516 | return 0; | |
517 | } | |
518 | #endif | |
519 | ||
aa6e52a3 TP |
520 | /*-------------------------------------------------------------------------*/ |
521 | ||
41ac7b3a | 522 | static int ohci_hcd_at91_drv_probe(struct platform_device *pdev) |
39a269c0 | 523 | { |
2419730f | 524 | struct at91_usbh_data *pdata; |
4bde4a4c | 525 | int i; |
aaf9f5fc NF |
526 | int gpio; |
527 | int ret; | |
4bde4a4c | 528 | |
1887ab2b NF |
529 | ret = ohci_at91_of_init(pdev); |
530 | if (ret) | |
531 | return ret; | |
2419730f | 532 | |
d4f09e28 | 533 | pdata = dev_get_platdata(&pdev->dev); |
2419730f | 534 | |
4bde4a4c | 535 | if (pdata) { |
0ee6d1ee | 536 | at91_for_each_port(i) { |
6fffb77c NF |
537 | /* |
538 | * do not configure PIO if not in relation with | |
539 | * real USB port on board | |
540 | */ | |
541 | if (i >= pdata->ports) { | |
542 | pdata->vbus_pin[i] = -EINVAL; | |
543 | pdata->overcurrent_pin[i] = -EINVAL; | |
544 | break; | |
545 | } | |
546 | ||
8a7a49d1 | 547 | if (!gpio_is_valid(pdata->vbus_pin[i])) |
4bde4a4c | 548 | continue; |
aaf9f5fc NF |
549 | gpio = pdata->vbus_pin[i]; |
550 | ||
551 | ret = gpio_request(gpio, "ohci_vbus"); | |
552 | if (ret) { | |
553 | dev_err(&pdev->dev, | |
554 | "can't request vbus gpio %d\n", gpio); | |
555 | continue; | |
556 | } | |
557 | ret = gpio_direction_output(gpio, | |
558 | !pdata->vbus_pin_active_low[i]); | |
559 | if (ret) { | |
560 | dev_err(&pdev->dev, | |
561 | "can't put vbus gpio %d as output %d\n", | |
562 | gpio, !pdata->vbus_pin_active_low[i]); | |
563 | gpio_free(gpio); | |
564 | continue; | |
565 | } | |
566 | ||
aa6e52a3 TP |
567 | ohci_at91_usb_set_power(pdata, i, 1); |
568 | } | |
569 | ||
0ee6d1ee | 570 | at91_for_each_port(i) { |
8a7a49d1 | 571 | if (!gpio_is_valid(pdata->overcurrent_pin[i])) |
aa6e52a3 | 572 | continue; |
aaf9f5fc NF |
573 | gpio = pdata->overcurrent_pin[i]; |
574 | ||
575 | ret = gpio_request(gpio, "ohci_overcurrent"); | |
576 | if (ret) { | |
577 | dev_err(&pdev->dev, | |
578 | "can't request overcurrent gpio %d\n", | |
579 | gpio); | |
580 | continue; | |
581 | } | |
582 | ||
583 | ret = gpio_direction_input(gpio); | |
584 | if (ret) { | |
585 | dev_err(&pdev->dev, | |
586 | "can't configure overcurrent gpio %d as input\n", | |
587 | gpio); | |
588 | gpio_free(gpio); | |
589 | continue; | |
590 | } | |
aa6e52a3 | 591 | |
aaf9f5fc | 592 | ret = request_irq(gpio_to_irq(gpio), |
aa6e52a3 TP |
593 | ohci_hcd_at91_overcurrent_irq, |
594 | IRQF_SHARED, "ohci_overcurrent", pdev); | |
595 | if (ret) { | |
aaf9f5fc NF |
596 | gpio_free(gpio); |
597 | dev_err(&pdev->dev, | |
598 | "can't get gpio IRQ for overcurrent\n"); | |
aa6e52a3 | 599 | } |
4bde4a4c DB |
600 | } |
601 | } | |
602 | ||
0365ee0a DB |
603 | device_init_wakeup(&pdev->dev, 1); |
604 | return usb_hcd_at91_probe(&ohci_at91_hc_driver, pdev); | |
39a269c0 AV |
605 | } |
606 | ||
fb4e98ab | 607 | static int ohci_hcd_at91_drv_remove(struct platform_device *pdev) |
39a269c0 | 608 | { |
d4f09e28 | 609 | struct at91_usbh_data *pdata = dev_get_platdata(&pdev->dev); |
4bde4a4c DB |
610 | int i; |
611 | ||
612 | if (pdata) { | |
0ee6d1ee | 613 | at91_for_each_port(i) { |
8a7a49d1 | 614 | if (!gpio_is_valid(pdata->vbus_pin[i])) |
4bde4a4c | 615 | continue; |
aa6e52a3 | 616 | ohci_at91_usb_set_power(pdata, i, 0); |
4bde4a4c DB |
617 | gpio_free(pdata->vbus_pin[i]); |
618 | } | |
aa6e52a3 | 619 | |
0ee6d1ee | 620 | at91_for_each_port(i) { |
8a7a49d1 | 621 | if (!gpio_is_valid(pdata->overcurrent_pin[i])) |
aa6e52a3 TP |
622 | continue; |
623 | free_irq(gpio_to_irq(pdata->overcurrent_pin[i]), pdev); | |
624 | gpio_free(pdata->overcurrent_pin[i]); | |
625 | } | |
4bde4a4c DB |
626 | } |
627 | ||
0365ee0a | 628 | device_init_wakeup(&pdev->dev, 0); |
421b4bf5 PZ |
629 | usb_hcd_at91_remove(platform_get_drvdata(pdev), pdev); |
630 | return 0; | |
39a269c0 AV |
631 | } |
632 | ||
633 | #ifdef CONFIG_PM | |
39a269c0 | 634 | |
68ba61b8 | 635 | static int |
0365ee0a | 636 | ohci_hcd_at91_drv_suspend(struct platform_device *pdev, pm_message_t mesg) |
68ba61b8 | 637 | { |
0365ee0a DB |
638 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
639 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); | |
a9d3840e MG |
640 | bool do_wakeup = device_may_wakeup(&pdev->dev); |
641 | int ret; | |
0365ee0a | 642 | |
a9d3840e | 643 | if (do_wakeup) |
0365ee0a | 644 | enable_irq_wake(hcd->irq); |
0365ee0a | 645 | |
a9d3840e MG |
646 | ret = ohci_suspend(hcd, do_wakeup); |
647 | if (ret) { | |
648 | disable_irq_wake(hcd->irq); | |
649 | return ret; | |
650 | } | |
0365ee0a DB |
651 | /* |
652 | * The integrated transceivers seem unable to notice disconnect, | |
653 | * reconnect, or wakeup without the 48 MHz clock active. so for | |
654 | * correctness, always discard connection state (using reset). | |
655 | * | |
656 | * REVISIT: some boards will be able to turn VBUS off... | |
657 | */ | |
658 | if (at91_suspend_entering_slow_clock()) { | |
e3825b48 MG |
659 | ohci->hc_control = ohci_readl(ohci, &ohci->regs->control); |
660 | ohci->hc_control &= OHCI_CTRL_RWC; | |
661 | ohci_writel(ohci, ohci->hc_control, &ohci->regs->control); | |
662 | ohci->rh_state = OHCI_RH_HALTED; | |
663 | ||
869aa98c PV |
664 | /* flush the writes */ |
665 | (void) ohci_readl (ohci, &ohci->regs->control); | |
ed077bb7 | 666 | at91_stop_clock(); |
0365ee0a | 667 | } |
39a269c0 | 668 | |
a9d3840e | 669 | return ret; |
39a269c0 AV |
670 | } |
671 | ||
0365ee0a | 672 | static int ohci_hcd_at91_drv_resume(struct platform_device *pdev) |
39a269c0 | 673 | { |
6dde896e MP |
674 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
675 | ||
676 | if (device_may_wakeup(&pdev->dev)) | |
677 | disable_irq_wake(hcd->irq); | |
678 | ||
ed077bb7 AV |
679 | if (!clocked) |
680 | at91_start_clock(); | |
39a269c0 | 681 | |
cfa49b4b | 682 | ohci_resume(hcd, false); |
39a269c0 AV |
683 | return 0; |
684 | } | |
685 | #else | |
686 | #define ohci_hcd_at91_drv_suspend NULL | |
687 | #define ohci_hcd_at91_drv_resume NULL | |
688 | #endif | |
689 | ||
690 | static struct platform_driver ohci_hcd_at91_driver = { | |
691 | .probe = ohci_hcd_at91_drv_probe, | |
7690417d | 692 | .remove = ohci_hcd_at91_drv_remove, |
64a21d02 | 693 | .shutdown = usb_hcd_platform_shutdown, |
39a269c0 AV |
694 | .suspend = ohci_hcd_at91_drv_suspend, |
695 | .resume = ohci_hcd_at91_drv_resume, | |
696 | .driver = { | |
0365ee0a | 697 | .name = "at91_ohci", |
39a269c0 | 698 | .owner = THIS_MODULE, |
2419730f | 699 | .of_match_table = of_match_ptr(at91_ohci_dt_ids), |
39a269c0 AV |
700 | }, |
701 | }; | |
e3825b48 MG |
702 | |
703 | static int __init ohci_at91_init(void) | |
704 | { | |
705 | if (usb_disabled()) | |
706 | return -ENODEV; | |
707 | ||
708 | pr_info("%s: " DRIVER_DESC "\n", hcd_name); | |
709 | ohci_init_driver(&ohci_at91_hc_driver, NULL); | |
710 | ||
711 | /* | |
712 | * The Atmel HW has some unusual quirks, which require Atmel-specific | |
713 | * workarounds. We override certain hc_driver functions here to | |
714 | * achieve that. We explicitly do not enhance ohci_driver_overrides to | |
715 | * allow this more easily, since this is an unusual case, and we don't | |
716 | * want to encourage others to override these functions by making it | |
717 | * too easy. | |
718 | */ | |
719 | ||
720 | orig_ohci_hub_control = ohci_at91_hc_driver.hub_control; | |
721 | orig_ohci_hub_status_data = ohci_at91_hc_driver.hub_status_data; | |
722 | ||
723 | ohci_at91_hc_driver.hub_status_data = ohci_at91_hub_status_data; | |
724 | ohci_at91_hc_driver.hub_control = ohci_at91_hub_control; | |
725 | ||
726 | return platform_driver_register(&ohci_hcd_at91_driver); | |
727 | } | |
728 | module_init(ohci_at91_init); | |
729 | ||
730 | static void __exit ohci_at91_cleanup(void) | |
731 | { | |
732 | platform_driver_unregister(&ohci_hcd_at91_driver); | |
733 | } | |
734 | module_exit(ohci_at91_cleanup); | |
735 | ||
736 | MODULE_DESCRIPTION(DRIVER_DESC); | |
737 | MODULE_LICENSE("GPL"); | |
738 | MODULE_ALIAS("platform:at91_ohci"); |