Commit | Line | Data |
---|---|---|
39a269c0 AV |
1 | /* |
2 | * OHCI HCD (Host Controller Driver) for USB. | |
3 | * | |
4 | * Copyright (C) 2004 SAN People (Pty) Ltd. | |
5 | * Copyright (C) 2005 Thibaut VARENE <varenet@parisc-linux.org> | |
6 | * | |
0365ee0a | 7 | * AT91 Bus Glue |
39a269c0 AV |
8 | * |
9 | * Based on fragments of 2.4 driver by Rick Bronson. | |
10 | * Based on ohci-omap.c | |
11 | * | |
12 | * This file is licenced under the GPL. | |
13 | */ | |
14 | ||
15 | #include <linux/clk.h> | |
e3825b48 | 16 | #include <linux/dma-mapping.h> |
2419730f JCPV |
17 | #include <linux/of_platform.h> |
18 | #include <linux/of_gpio.h> | |
e3825b48 | 19 | #include <linux/platform_device.h> |
bcd2360c | 20 | #include <linux/platform_data/atmel.h> |
e3825b48 MG |
21 | #include <linux/io.h> |
22 | #include <linux/kernel.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/usb.h> | |
25 | #include <linux/usb/hcd.h> | |
39a269c0 | 26 | |
4bde4a4c DB |
27 | #include <asm/gpio.h> |
28 | ||
e3825b48 | 29 | #include "ohci.h" |
39a269c0 | 30 | |
0ee6d1ee NF |
31 | #define valid_port(index) ((index) >= 0 && (index) < AT91_MAX_USBH_PORTS) |
32 | #define at91_for_each_port(index) \ | |
33 | for ((index) = 0; (index) < AT91_MAX_USBH_PORTS; (index)++) | |
34 | ||
6b0a1cf7 | 35 | /* interface, function and usb clocks; sometimes also an AHB clock */ |
1b207459 SR |
36 | #define hcd_to_ohci_at91_priv(h) \ |
37 | ((struct ohci_at91_priv *)hcd_to_ohci(h)->priv) | |
38 | ||
39 | struct ohci_at91_priv { | |
40 | struct clk *iclk; | |
41 | struct clk *fclk; | |
1b207459 SR |
42 | struct clk *hclk; |
43 | bool clocked; | |
1cee6b8d | 44 | bool wakeup; /* Saved wake-up state for resume */ |
1b207459 | 45 | }; |
e3825b48 MG |
46 | /* interface and function clocks; sometimes also an AHB clock */ |
47 | ||
48 | #define DRIVER_DESC "OHCI Atmel driver" | |
49 | ||
50 | static const char hcd_name[] = "ohci-atmel"; | |
51 | ||
52 | static struct hc_driver __read_mostly ohci_at91_hc_driver; | |
1b207459 SR |
53 | |
54 | static const struct ohci_driver_overrides ohci_at91_drv_overrides __initconst = { | |
55 | .extra_priv_size = sizeof(struct ohci_at91_priv), | |
56 | }; | |
39a269c0 AV |
57 | |
58 | extern int usb_disabled(void); | |
59 | ||
60 | /*-------------------------------------------------------------------------*/ | |
61 | ||
1b207459 | 62 | static void at91_start_clock(struct ohci_at91_priv *ohci_at91) |
ed077bb7 | 63 | { |
1cee6b8d SR |
64 | if (ohci_at91->clocked) |
65 | return; | |
963719c8 BB |
66 | |
67 | clk_set_rate(ohci_at91->fclk, 48000000); | |
1b207459 SR |
68 | clk_prepare_enable(ohci_at91->hclk); |
69 | clk_prepare_enable(ohci_at91->iclk); | |
70 | clk_prepare_enable(ohci_at91->fclk); | |
71 | ohci_at91->clocked = true; | |
ed077bb7 AV |
72 | } |
73 | ||
1b207459 | 74 | static void at91_stop_clock(struct ohci_at91_priv *ohci_at91) |
ed077bb7 | 75 | { |
1cee6b8d SR |
76 | if (!ohci_at91->clocked) |
77 | return; | |
963719c8 | 78 | |
1b207459 SR |
79 | clk_disable_unprepare(ohci_at91->fclk); |
80 | clk_disable_unprepare(ohci_at91->iclk); | |
81 | clk_disable_unprepare(ohci_at91->hclk); | |
1b207459 | 82 | ohci_at91->clocked = false; |
ed077bb7 AV |
83 | } |
84 | ||
39a269c0 AV |
85 | static void at91_start_hc(struct platform_device *pdev) |
86 | { | |
87 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
88 | struct ohci_regs __iomem *regs = hcd->regs; | |
1b207459 | 89 | struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd); |
39a269c0 | 90 | |
0365ee0a | 91 | dev_dbg(&pdev->dev, "start\n"); |
39a269c0 AV |
92 | |
93 | /* | |
94 | * Start the USB clocks. | |
95 | */ | |
1b207459 | 96 | at91_start_clock(ohci_at91); |
39a269c0 AV |
97 | |
98 | /* | |
99 | * The USB host controller must remain in reset. | |
100 | */ | |
101 | writel(0, ®s->control); | |
102 | } | |
103 | ||
104 | static void at91_stop_hc(struct platform_device *pdev) | |
105 | { | |
106 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
107 | struct ohci_regs __iomem *regs = hcd->regs; | |
1b207459 | 108 | struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd); |
39a269c0 | 109 | |
0365ee0a | 110 | dev_dbg(&pdev->dev, "stop\n"); |
39a269c0 AV |
111 | |
112 | /* | |
113 | * Put the USB host controller into reset. | |
114 | */ | |
115 | writel(0, ®s->control); | |
116 | ||
117 | /* | |
118 | * Stop the USB clocks. | |
119 | */ | |
1b207459 | 120 | at91_stop_clock(ohci_at91); |
39a269c0 AV |
121 | } |
122 | ||
123 | ||
124 | /*-------------------------------------------------------------------------*/ | |
125 | ||
fb4e98ab | 126 | static void usb_hcd_at91_remove (struct usb_hcd *, struct platform_device *); |
39a269c0 AV |
127 | |
128 | /* configure so an HC device and id are always provided */ | |
129 | /* always called with process context; sleeping is OK */ | |
130 | ||
131 | ||
132 | /** | |
0365ee0a | 133 | * usb_hcd_at91_probe - initialize AT91-based HCDs |
39a269c0 AV |
134 | * Context: !in_interrupt() |
135 | * | |
136 | * Allocates basic resources for this USB host controller, and | |
137 | * then invokes the start() method for the HCD associated with it | |
138 | * through the hotplug entry's driver_data. | |
39a269c0 | 139 | */ |
41ac7b3a | 140 | static int usb_hcd_at91_probe(const struct hc_driver *driver, |
0365ee0a | 141 | struct platform_device *pdev) |
39a269c0 | 142 | { |
e3825b48 MG |
143 | struct at91_usbh_data *board; |
144 | struct ohci_hcd *ohci; | |
39a269c0 | 145 | int retval; |
3b3394af | 146 | struct usb_hcd *hcd; |
1b207459 | 147 | struct ohci_at91_priv *ohci_at91; |
fb5f1834 BB |
148 | struct device *dev = &pdev->dev; |
149 | struct resource *res; | |
150 | int irq; | |
151 | ||
fb5f1834 BB |
152 | irq = platform_get_irq(pdev, 0); |
153 | if (irq < 0) { | |
154 | dev_dbg(dev, "hcd probe: missing irq resource\n"); | |
155 | return irq; | |
39a269c0 AV |
156 | } |
157 | ||
5b218a07 | 158 | hcd = usb_create_hcd(driver, dev, "at91"); |
39a269c0 AV |
159 | if (!hcd) |
160 | return -ENOMEM; | |
1b207459 | 161 | ohci_at91 = hcd_to_ohci_at91_priv(hcd); |
39a269c0 | 162 | |
04dc3150 | 163 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
cca2bbb3 BB |
164 | hcd->regs = devm_ioremap_resource(dev, res); |
165 | if (IS_ERR(hcd->regs)) { | |
166 | retval = PTR_ERR(hcd->regs); | |
167 | goto err; | |
39a269c0 | 168 | } |
04dc3150 VB |
169 | hcd->rsrc_start = res->start; |
170 | hcd->rsrc_len = resource_size(res); | |
39a269c0 | 171 | |
1b207459 SR |
172 | ohci_at91->iclk = devm_clk_get(dev, "ohci_clk"); |
173 | if (IS_ERR(ohci_at91->iclk)) { | |
5b218a07 | 174 | dev_err(dev, "failed to get ohci_clk\n"); |
1b207459 | 175 | retval = PTR_ERR(ohci_at91->iclk); |
cca2bbb3 | 176 | goto err; |
6813463c | 177 | } |
1b207459 SR |
178 | ohci_at91->fclk = devm_clk_get(dev, "uhpck"); |
179 | if (IS_ERR(ohci_at91->fclk)) { | |
5b218a07 | 180 | dev_err(dev, "failed to get uhpck\n"); |
1b207459 | 181 | retval = PTR_ERR(ohci_at91->fclk); |
fc7a3252 | 182 | goto err; |
6813463c | 183 | } |
1b207459 SR |
184 | ohci_at91->hclk = devm_clk_get(dev, "hclk"); |
185 | if (IS_ERR(ohci_at91->hclk)) { | |
5b218a07 | 186 | dev_err(dev, "failed to get hclk\n"); |
1b207459 | 187 | retval = PTR_ERR(ohci_at91->hclk); |
fc7a3252 | 188 | goto err; |
6813463c | 189 | } |
39a269c0 | 190 | |
e3825b48 MG |
191 | board = hcd->self.controller->platform_data; |
192 | ohci = hcd_to_ohci(hcd); | |
193 | ohci->num_ports = board->ports; | |
39a269c0 | 194 | at91_start_hc(pdev); |
39a269c0 | 195 | |
fb5f1834 | 196 | retval = usb_add_hcd(hcd, irq, IRQF_SHARED); |
1f53b485 | 197 | if (retval == 0) { |
3c9740a1 | 198 | device_wakeup_enable(hcd->self.controller); |
39a269c0 | 199 | return retval; |
3c9740a1 | 200 | } |
39a269c0 AV |
201 | |
202 | /* Error handling */ | |
203 | at91_stop_hc(pdev); | |
204 | ||
cca2bbb3 | 205 | err: |
39a269c0 AV |
206 | usb_put_hcd(hcd); |
207 | return retval; | |
208 | } | |
209 | ||
210 | ||
39a269c0 AV |
211 | /* may be called with controller, bus, and devices active */ |
212 | ||
213 | /** | |
0365ee0a | 214 | * usb_hcd_at91_remove - shutdown processing for AT91-based HCDs |
39a269c0 AV |
215 | * @dev: USB Host Controller being removed |
216 | * Context: !in_interrupt() | |
217 | * | |
218 | * Reverses the effect of usb_hcd_at91_probe(), first invoking | |
219 | * the HCD's stop() method. It is always called from a thread | |
0365ee0a | 220 | * context, "rmmod" or something similar. |
39a269c0 AV |
221 | * |
222 | */ | |
fb4e98ab | 223 | static void usb_hcd_at91_remove(struct usb_hcd *hcd, |
0365ee0a | 224 | struct platform_device *pdev) |
39a269c0 AV |
225 | { |
226 | usb_remove_hcd(hcd); | |
227 | at91_stop_hc(pdev); | |
421b4bf5 | 228 | usb_put_hcd(hcd); |
39a269c0 AV |
229 | } |
230 | ||
231 | /*-------------------------------------------------------------------------*/ | |
aa6e52a3 TP |
232 | static void ohci_at91_usb_set_power(struct at91_usbh_data *pdata, int port, int enable) |
233 | { | |
0ee6d1ee | 234 | if (!valid_port(port)) |
aa6e52a3 TP |
235 | return; |
236 | ||
8a7a49d1 | 237 | if (!gpio_is_valid(pdata->vbus_pin[port])) |
770f0baa JCPV |
238 | return; |
239 | ||
8134ff55 | 240 | gpio_set_value(pdata->vbus_pin[port], |
1e7caf8b | 241 | pdata->vbus_pin_active_low[port] ^ enable); |
aa6e52a3 TP |
242 | } |
243 | ||
244 | static int ohci_at91_usb_get_power(struct at91_usbh_data *pdata, int port) | |
245 | { | |
0ee6d1ee | 246 | if (!valid_port(port)) |
aa6e52a3 TP |
247 | return -EINVAL; |
248 | ||
8a7a49d1 | 249 | if (!gpio_is_valid(pdata->vbus_pin[port])) |
770f0baa JCPV |
250 | return -EINVAL; |
251 | ||
8134ff55 | 252 | return gpio_get_value(pdata->vbus_pin[port]) ^ |
1e7caf8b | 253 | pdata->vbus_pin_active_low[port]; |
aa6e52a3 TP |
254 | } |
255 | ||
256 | /* | |
257 | * Update the status data from the hub with the over-current indicator change. | |
258 | */ | |
259 | static int ohci_at91_hub_status_data(struct usb_hcd *hcd, char *buf) | |
260 | { | |
e3825b48 | 261 | struct at91_usbh_data *pdata = hcd->self.controller->platform_data; |
42b59eba | 262 | int length = ohci_hub_status_data(hcd, buf); |
aa6e52a3 TP |
263 | int port; |
264 | ||
0ee6d1ee | 265 | at91_for_each_port(port) { |
aa6e52a3 | 266 | if (pdata->overcurrent_changed[port]) { |
0ee6d1ee | 267 | if (!length) |
aa6e52a3 TP |
268 | length = 1; |
269 | buf[0] |= 1 << (port + 1); | |
270 | } | |
271 | } | |
272 | ||
273 | return length; | |
274 | } | |
275 | ||
276 | /* | |
277 | * Look at the control requests to the root hub and see if we need to override. | |
278 | */ | |
279 | static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, | |
280 | u16 wIndex, char *buf, u16 wLength) | |
281 | { | |
d4f09e28 | 282 | struct at91_usbh_data *pdata = dev_get_platdata(hcd->self.controller); |
aa6e52a3 TP |
283 | struct usb_hub_descriptor *desc; |
284 | int ret = -EINVAL; | |
285 | u32 *data = (u32 *)buf; | |
286 | ||
287 | dev_dbg(hcd->self.controller, | |
288 | "ohci_at91_hub_control(%p,0x%04x,0x%04x,0x%04x,%p,%04x)\n", | |
289 | hcd, typeReq, wValue, wIndex, buf, wLength); | |
290 | ||
0ee6d1ee NF |
291 | wIndex--; |
292 | ||
aa6e52a3 TP |
293 | switch (typeReq) { |
294 | case SetPortFeature: | |
295 | if (wValue == USB_PORT_FEAT_POWER) { | |
296 | dev_dbg(hcd->self.controller, "SetPortFeat: POWER\n"); | |
0ee6d1ee NF |
297 | if (valid_port(wIndex)) { |
298 | ohci_at91_usb_set_power(pdata, wIndex, 1); | |
299 | ret = 0; | |
300 | } | |
301 | ||
aa6e52a3 TP |
302 | goto out; |
303 | } | |
304 | break; | |
305 | ||
306 | case ClearPortFeature: | |
307 | switch (wValue) { | |
308 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
309 | dev_dbg(hcd->self.controller, | |
310 | "ClearPortFeature: C_OVER_CURRENT\n"); | |
311 | ||
0ee6d1ee NF |
312 | if (valid_port(wIndex)) { |
313 | pdata->overcurrent_changed[wIndex] = 0; | |
314 | pdata->overcurrent_status[wIndex] = 0; | |
aa6e52a3 TP |
315 | } |
316 | ||
317 | goto out; | |
318 | ||
319 | case USB_PORT_FEAT_OVER_CURRENT: | |
320 | dev_dbg(hcd->self.controller, | |
321 | "ClearPortFeature: OVER_CURRENT\n"); | |
322 | ||
0ee6d1ee NF |
323 | if (valid_port(wIndex)) |
324 | pdata->overcurrent_status[wIndex] = 0; | |
aa6e52a3 TP |
325 | |
326 | goto out; | |
327 | ||
328 | case USB_PORT_FEAT_POWER: | |
329 | dev_dbg(hcd->self.controller, | |
330 | "ClearPortFeature: POWER\n"); | |
331 | ||
0ee6d1ee NF |
332 | if (valid_port(wIndex)) { |
333 | ohci_at91_usb_set_power(pdata, wIndex, 0); | |
aa6e52a3 TP |
334 | return 0; |
335 | } | |
336 | } | |
337 | break; | |
338 | } | |
339 | ||
42b59eba | 340 | ret = ohci_hub_control(hcd, typeReq, wValue, wIndex + 1, buf, wLength); |
aa6e52a3 TP |
341 | if (ret) |
342 | goto out; | |
343 | ||
344 | switch (typeReq) { | |
345 | case GetHubDescriptor: | |
346 | ||
347 | /* update the hub's descriptor */ | |
348 | ||
349 | desc = (struct usb_hub_descriptor *)buf; | |
350 | ||
351 | dev_dbg(hcd->self.controller, "wHubCharacteristics 0x%04x\n", | |
352 | desc->wHubCharacteristics); | |
353 | ||
354 | /* remove the old configurations for power-switching, and | |
355 | * over-current protection, and insert our new configuration | |
356 | */ | |
357 | ||
358 | desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_LPSM); | |
a9c49bcd SS |
359 | desc->wHubCharacteristics |= |
360 | cpu_to_le16(HUB_CHAR_INDV_PORT_LPSM); | |
aa6e52a3 TP |
361 | |
362 | if (pdata->overcurrent_supported) { | |
363 | desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_OCPM); | |
a9c49bcd SS |
364 | desc->wHubCharacteristics |= |
365 | cpu_to_le16(HUB_CHAR_INDV_PORT_OCPM); | |
aa6e52a3 TP |
366 | } |
367 | ||
368 | dev_dbg(hcd->self.controller, "wHubCharacteristics after 0x%04x\n", | |
369 | desc->wHubCharacteristics); | |
370 | ||
371 | return ret; | |
372 | ||
373 | case GetPortStatus: | |
374 | /* check port status */ | |
375 | ||
376 | dev_dbg(hcd->self.controller, "GetPortStatus(%d)\n", wIndex); | |
377 | ||
0ee6d1ee NF |
378 | if (valid_port(wIndex)) { |
379 | if (!ohci_at91_usb_get_power(pdata, wIndex)) | |
aa6e52a3 | 380 | *data &= ~cpu_to_le32(RH_PS_PPS); |
aa6e52a3 | 381 | |
0ee6d1ee | 382 | if (pdata->overcurrent_changed[wIndex]) |
aa6e52a3 | 383 | *data |= cpu_to_le32(RH_PS_OCIC); |
aa6e52a3 | 384 | |
0ee6d1ee | 385 | if (pdata->overcurrent_status[wIndex]) |
aa6e52a3 | 386 | *data |= cpu_to_le32(RH_PS_POCI); |
aa6e52a3 TP |
387 | } |
388 | } | |
389 | ||
390 | out: | |
391 | return ret; | |
392 | } | |
393 | ||
39a269c0 AV |
394 | /*-------------------------------------------------------------------------*/ |
395 | ||
aa6e52a3 TP |
396 | static irqreturn_t ohci_hcd_at91_overcurrent_irq(int irq, void *data) |
397 | { | |
398 | struct platform_device *pdev = data; | |
d4f09e28 | 399 | struct at91_usbh_data *pdata = dev_get_platdata(&pdev->dev); |
aa6e52a3 TP |
400 | int val, gpio, port; |
401 | ||
402 | /* From the GPIO notifying the over-current situation, find | |
403 | * out the corresponding port */ | |
0ee6d1ee | 404 | at91_for_each_port(port) { |
01bb6501 JE |
405 | if (gpio_is_valid(pdata->overcurrent_pin[port]) && |
406 | gpio_to_irq(pdata->overcurrent_pin[port]) == irq) { | |
e4499079 | 407 | gpio = pdata->overcurrent_pin[port]; |
aa6e52a3 | 408 | break; |
e4499079 | 409 | } |
aa6e52a3 TP |
410 | } |
411 | ||
0ee6d1ee | 412 | if (port == AT91_MAX_USBH_PORTS) { |
aa6e52a3 TP |
413 | dev_err(& pdev->dev, "overcurrent interrupt from unknown GPIO\n"); |
414 | return IRQ_HANDLED; | |
415 | } | |
416 | ||
417 | val = gpio_get_value(gpio); | |
418 | ||
419 | /* When notified of an over-current situation, disable power | |
420 | on the corresponding port, and mark this port in | |
421 | over-current. */ | |
0ee6d1ee | 422 | if (!val) { |
aa6e52a3 TP |
423 | ohci_at91_usb_set_power(pdata, port, 0); |
424 | pdata->overcurrent_status[port] = 1; | |
425 | pdata->overcurrent_changed[port] = 1; | |
426 | } | |
427 | ||
428 | dev_dbg(& pdev->dev, "overcurrent situation %s\n", | |
429 | val ? "exited" : "notified"); | |
430 | ||
431 | return IRQ_HANDLED; | |
432 | } | |
433 | ||
2419730f JCPV |
434 | #ifdef CONFIG_OF |
435 | static const struct of_device_id at91_ohci_dt_ids[] = { | |
436 | { .compatible = "atmel,at91rm9200-ohci" }, | |
437 | { /* sentinel */ } | |
438 | }; | |
439 | ||
440 | MODULE_DEVICE_TABLE(of, at91_ohci_dt_ids); | |
441 | ||
41ac7b3a | 442 | static int ohci_at91_of_init(struct platform_device *pdev) |
2419730f JCPV |
443 | { |
444 | struct device_node *np = pdev->dev.of_node; | |
22d9d8e8 | 445 | int i, gpio, ret; |
2419730f JCPV |
446 | enum of_gpio_flags flags; |
447 | struct at91_usbh_data *pdata; | |
448 | u32 ports; | |
449 | ||
450 | if (!np) | |
451 | return 0; | |
452 | ||
453 | /* Right now device-tree probed devices don't get dma_mask set. | |
454 | * Since shared usb code relies on it, set it here for now. | |
455 | * Once we have dma capability bindings this can go away. | |
456 | */ | |
e1fd7341 | 457 | ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); |
22d9d8e8 RK |
458 | if (ret) |
459 | return ret; | |
2419730f JCPV |
460 | |
461 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); | |
462 | if (!pdata) | |
463 | return -ENOMEM; | |
464 | ||
465 | if (!of_property_read_u32(np, "num-ports", &ports)) | |
466 | pdata->ports = ports; | |
467 | ||
0ee6d1ee | 468 | at91_for_each_port(i) { |
2419730f JCPV |
469 | gpio = of_get_named_gpio_flags(np, "atmel,vbus-gpio", i, &flags); |
470 | pdata->vbus_pin[i] = gpio; | |
471 | if (!gpio_is_valid(gpio)) | |
472 | continue; | |
473 | pdata->vbus_pin_active_low[i] = flags & OF_GPIO_ACTIVE_LOW; | |
2419730f JCPV |
474 | } |
475 | ||
0ee6d1ee | 476 | at91_for_each_port(i) |
aaf9f5fc NF |
477 | pdata->overcurrent_pin[i] = |
478 | of_get_named_gpio_flags(np, "atmel,oc-gpio", i, &flags); | |
2419730f JCPV |
479 | |
480 | pdev->dev.platform_data = pdata; | |
481 | ||
482 | return 0; | |
483 | } | |
484 | #else | |
41ac7b3a | 485 | static int ohci_at91_of_init(struct platform_device *pdev) |
2419730f JCPV |
486 | { |
487 | return 0; | |
488 | } | |
489 | #endif | |
490 | ||
aa6e52a3 TP |
491 | /*-------------------------------------------------------------------------*/ |
492 | ||
41ac7b3a | 493 | static int ohci_hcd_at91_drv_probe(struct platform_device *pdev) |
39a269c0 | 494 | { |
2419730f | 495 | struct at91_usbh_data *pdata; |
4bde4a4c | 496 | int i; |
aaf9f5fc NF |
497 | int gpio; |
498 | int ret; | |
4bde4a4c | 499 | |
1887ab2b NF |
500 | ret = ohci_at91_of_init(pdev); |
501 | if (ret) | |
502 | return ret; | |
2419730f | 503 | |
d4f09e28 | 504 | pdata = dev_get_platdata(&pdev->dev); |
2419730f | 505 | |
4bde4a4c | 506 | if (pdata) { |
0ee6d1ee | 507 | at91_for_each_port(i) { |
6fffb77c NF |
508 | /* |
509 | * do not configure PIO if not in relation with | |
510 | * real USB port on board | |
511 | */ | |
512 | if (i >= pdata->ports) { | |
513 | pdata->vbus_pin[i] = -EINVAL; | |
514 | pdata->overcurrent_pin[i] = -EINVAL; | |
515 | break; | |
516 | } | |
517 | ||
8a7a49d1 | 518 | if (!gpio_is_valid(pdata->vbus_pin[i])) |
4bde4a4c | 519 | continue; |
aaf9f5fc NF |
520 | gpio = pdata->vbus_pin[i]; |
521 | ||
522 | ret = gpio_request(gpio, "ohci_vbus"); | |
523 | if (ret) { | |
524 | dev_err(&pdev->dev, | |
525 | "can't request vbus gpio %d\n", gpio); | |
526 | continue; | |
527 | } | |
528 | ret = gpio_direction_output(gpio, | |
529 | !pdata->vbus_pin_active_low[i]); | |
530 | if (ret) { | |
531 | dev_err(&pdev->dev, | |
532 | "can't put vbus gpio %d as output %d\n", | |
533 | gpio, !pdata->vbus_pin_active_low[i]); | |
534 | gpio_free(gpio); | |
535 | continue; | |
536 | } | |
537 | ||
aa6e52a3 TP |
538 | ohci_at91_usb_set_power(pdata, i, 1); |
539 | } | |
540 | ||
0ee6d1ee | 541 | at91_for_each_port(i) { |
8a7a49d1 | 542 | if (!gpio_is_valid(pdata->overcurrent_pin[i])) |
aa6e52a3 | 543 | continue; |
aaf9f5fc NF |
544 | gpio = pdata->overcurrent_pin[i]; |
545 | ||
546 | ret = gpio_request(gpio, "ohci_overcurrent"); | |
547 | if (ret) { | |
548 | dev_err(&pdev->dev, | |
549 | "can't request overcurrent gpio %d\n", | |
550 | gpio); | |
551 | continue; | |
552 | } | |
553 | ||
554 | ret = gpio_direction_input(gpio); | |
555 | if (ret) { | |
556 | dev_err(&pdev->dev, | |
557 | "can't configure overcurrent gpio %d as input\n", | |
558 | gpio); | |
559 | gpio_free(gpio); | |
560 | continue; | |
561 | } | |
aa6e52a3 | 562 | |
aaf9f5fc | 563 | ret = request_irq(gpio_to_irq(gpio), |
aa6e52a3 TP |
564 | ohci_hcd_at91_overcurrent_irq, |
565 | IRQF_SHARED, "ohci_overcurrent", pdev); | |
566 | if (ret) { | |
aaf9f5fc NF |
567 | gpio_free(gpio); |
568 | dev_err(&pdev->dev, | |
569 | "can't get gpio IRQ for overcurrent\n"); | |
aa6e52a3 | 570 | } |
4bde4a4c DB |
571 | } |
572 | } | |
573 | ||
0365ee0a DB |
574 | device_init_wakeup(&pdev->dev, 1); |
575 | return usb_hcd_at91_probe(&ohci_at91_hc_driver, pdev); | |
39a269c0 AV |
576 | } |
577 | ||
fb4e98ab | 578 | static int ohci_hcd_at91_drv_remove(struct platform_device *pdev) |
39a269c0 | 579 | { |
d4f09e28 | 580 | struct at91_usbh_data *pdata = dev_get_platdata(&pdev->dev); |
4bde4a4c DB |
581 | int i; |
582 | ||
583 | if (pdata) { | |
0ee6d1ee | 584 | at91_for_each_port(i) { |
8a7a49d1 | 585 | if (!gpio_is_valid(pdata->vbus_pin[i])) |
4bde4a4c | 586 | continue; |
aa6e52a3 | 587 | ohci_at91_usb_set_power(pdata, i, 0); |
4bde4a4c DB |
588 | gpio_free(pdata->vbus_pin[i]); |
589 | } | |
aa6e52a3 | 590 | |
0ee6d1ee | 591 | at91_for_each_port(i) { |
8a7a49d1 | 592 | if (!gpio_is_valid(pdata->overcurrent_pin[i])) |
aa6e52a3 TP |
593 | continue; |
594 | free_irq(gpio_to_irq(pdata->overcurrent_pin[i]), pdev); | |
595 | gpio_free(pdata->overcurrent_pin[i]); | |
596 | } | |
4bde4a4c DB |
597 | } |
598 | ||
0365ee0a | 599 | device_init_wakeup(&pdev->dev, 0); |
421b4bf5 PZ |
600 | usb_hcd_at91_remove(platform_get_drvdata(pdev), pdev); |
601 | return 0; | |
39a269c0 AV |
602 | } |
603 | ||
604 | #ifdef CONFIG_PM | |
39a269c0 | 605 | |
68ba61b8 | 606 | static int |
94ac0e5d | 607 | ohci_hcd_at91_drv_suspend(struct device *dev) |
68ba61b8 | 608 | { |
94ac0e5d | 609 | struct usb_hcd *hcd = dev_get_drvdata(dev); |
0365ee0a | 610 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); |
1b207459 | 611 | struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd); |
a9d3840e | 612 | int ret; |
0365ee0a | 613 | |
1cee6b8d SR |
614 | /* |
615 | * Disable wakeup if we are going to sleep with slow clock mode | |
616 | * enabled. | |
617 | */ | |
618 | ohci_at91->wakeup = device_may_wakeup(dev) | |
619 | && !at91_suspend_entering_slow_clock(); | |
620 | ||
621 | if (ohci_at91->wakeup) | |
0365ee0a | 622 | enable_irq_wake(hcd->irq); |
0365ee0a | 623 | |
1cee6b8d | 624 | ret = ohci_suspend(hcd, ohci_at91->wakeup); |
a9d3840e | 625 | if (ret) { |
1cee6b8d SR |
626 | if (ohci_at91->wakeup) |
627 | disable_irq_wake(hcd->irq); | |
a9d3840e MG |
628 | return ret; |
629 | } | |
0365ee0a DB |
630 | /* |
631 | * The integrated transceivers seem unable to notice disconnect, | |
632 | * reconnect, or wakeup without the 48 MHz clock active. so for | |
633 | * correctness, always discard connection state (using reset). | |
634 | * | |
635 | * REVISIT: some boards will be able to turn VBUS off... | |
636 | */ | |
1cee6b8d | 637 | if (!ohci_at91->wakeup) { |
e3825b48 MG |
638 | ohci->hc_control = ohci_readl(ohci, &ohci->regs->control); |
639 | ohci->hc_control &= OHCI_CTRL_RWC; | |
640 | ohci_writel(ohci, ohci->hc_control, &ohci->regs->control); | |
641 | ohci->rh_state = OHCI_RH_HALTED; | |
642 | ||
869aa98c PV |
643 | /* flush the writes */ |
644 | (void) ohci_readl (ohci, &ohci->regs->control); | |
1b207459 | 645 | at91_stop_clock(ohci_at91); |
0365ee0a | 646 | } |
39a269c0 | 647 | |
a9d3840e | 648 | return ret; |
39a269c0 AV |
649 | } |
650 | ||
94ac0e5d | 651 | static int ohci_hcd_at91_drv_resume(struct device *dev) |
39a269c0 | 652 | { |
94ac0e5d | 653 | struct usb_hcd *hcd = dev_get_drvdata(dev); |
1b207459 | 654 | struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd); |
6dde896e | 655 | |
1cee6b8d | 656 | if (ohci_at91->wakeup) |
6dde896e MP |
657 | disable_irq_wake(hcd->irq); |
658 | ||
1cee6b8d | 659 | at91_start_clock(ohci_at91); |
39a269c0 | 660 | |
cfa49b4b | 661 | ohci_resume(hcd, false); |
39a269c0 AV |
662 | return 0; |
663 | } | |
39a269c0 AV |
664 | #endif |
665 | ||
94ac0e5d SR |
666 | static SIMPLE_DEV_PM_OPS(ohci_hcd_at91_pm_ops, ohci_hcd_at91_drv_suspend, |
667 | ohci_hcd_at91_drv_resume); | |
668 | ||
39a269c0 AV |
669 | static struct platform_driver ohci_hcd_at91_driver = { |
670 | .probe = ohci_hcd_at91_drv_probe, | |
7690417d | 671 | .remove = ohci_hcd_at91_drv_remove, |
64a21d02 | 672 | .shutdown = usb_hcd_platform_shutdown, |
39a269c0 | 673 | .driver = { |
0365ee0a | 674 | .name = "at91_ohci", |
94ac0e5d | 675 | .pm = &ohci_hcd_at91_pm_ops, |
2419730f | 676 | .of_match_table = of_match_ptr(at91_ohci_dt_ids), |
39a269c0 AV |
677 | }, |
678 | }; | |
e3825b48 MG |
679 | |
680 | static int __init ohci_at91_init(void) | |
681 | { | |
682 | if (usb_disabled()) | |
683 | return -ENODEV; | |
684 | ||
685 | pr_info("%s: " DRIVER_DESC "\n", hcd_name); | |
1b207459 | 686 | ohci_init_driver(&ohci_at91_hc_driver, &ohci_at91_drv_overrides); |
e3825b48 MG |
687 | |
688 | /* | |
689 | * The Atmel HW has some unusual quirks, which require Atmel-specific | |
690 | * workarounds. We override certain hc_driver functions here to | |
691 | * achieve that. We explicitly do not enhance ohci_driver_overrides to | |
692 | * allow this more easily, since this is an unusual case, and we don't | |
693 | * want to encourage others to override these functions by making it | |
694 | * too easy. | |
695 | */ | |
696 | ||
e3825b48 MG |
697 | ohci_at91_hc_driver.hub_status_data = ohci_at91_hub_status_data; |
698 | ohci_at91_hc_driver.hub_control = ohci_at91_hub_control; | |
699 | ||
700 | return platform_driver_register(&ohci_hcd_at91_driver); | |
701 | } | |
702 | module_init(ohci_at91_init); | |
703 | ||
704 | static void __exit ohci_at91_cleanup(void) | |
705 | { | |
706 | platform_driver_unregister(&ohci_hcd_at91_driver); | |
707 | } | |
708 | module_exit(ohci_at91_cleanup); | |
709 | ||
710 | MODULE_DESCRIPTION(DRIVER_DESC); | |
711 | MODULE_LICENSE("GPL"); | |
712 | MODULE_ALIAS("platform:at91_ohci"); |