Commit | Line | Data |
---|---|---|
79ad3b5a BG |
1 | /* |
2 | * EHCI-compliant USB host controller driver for NVIDIA Tegra SoCs | |
3 | * | |
4 | * Copyright (C) 2010 Google, Inc. | |
bbdabdb6 | 5 | * Copyright (C) 2009 - 2013 NVIDIA Corporation |
79ad3b5a BG |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2 of the License, or (at your | |
10 | * option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
13 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
15 | * more details. | |
16 | * | |
17 | */ | |
18 | ||
19 | #include <linux/clk.h> | |
9fc5f24e | 20 | #include <linux/dma-mapping.h> |
ded017ee | 21 | #include <linux/err.h> |
4a53f4e6 | 22 | #include <linux/gpio.h> |
9fc5f24e MG |
23 | #include <linux/io.h> |
24 | #include <linux/irq.h> | |
25 | #include <linux/module.h> | |
4a53f4e6 | 26 | #include <linux/of.h> |
327d8b42 | 27 | #include <linux/of_device.h> |
4a53f4e6 | 28 | #include <linux/of_gpio.h> |
9fc5f24e | 29 | #include <linux/platform_device.h> |
ebf20de4 | 30 | #include <linux/pm_runtime.h> |
75606f5d | 31 | #include <linux/reset.h> |
9fc5f24e | 32 | #include <linux/slab.h> |
bbdabdb6 | 33 | #include <linux/usb/ehci_def.h> |
1ba8216f | 34 | #include <linux/usb/tegra_usb_phy.h> |
9fc5f24e MG |
35 | #include <linux/usb.h> |
36 | #include <linux/usb/hcd.h> | |
37 | #include <linux/usb/otg.h> | |
38 | ||
39 | #include "ehci.h" | |
54388b28 | 40 | |
9fc5f24e MG |
41 | #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) |
42 | ||
fbf9865c RM |
43 | #define TEGRA_USB_DMA_ALIGN 32 |
44 | ||
9fc5f24e MG |
45 | #define DRIVER_DESC "Tegra EHCI driver" |
46 | #define DRV_NAME "tegra-ehci" | |
47 | ||
48 | static struct hc_driver __read_mostly tegra_ehci_hc_driver; | |
a47cc24c | 49 | static bool usb1_reset_attempted; |
9fc5f24e | 50 | |
327d8b42 TT |
51 | struct tegra_ehci_soc_config { |
52 | bool has_hostpc; | |
53 | }; | |
54 | ||
79ad3b5a | 55 | struct tegra_ehci_hcd { |
79ad3b5a BG |
56 | struct tegra_usb_phy *phy; |
57 | struct clk *clk; | |
75606f5d | 58 | struct reset_control *rst; |
79ad3b5a | 59 | int port_resuming; |
585355c5 | 60 | bool needs_double_reset; |
79ad3b5a BG |
61 | enum tegra_usb_phy_port_speed port_speed; |
62 | }; | |
63 | ||
a47cc24c TT |
64 | /* |
65 | * The 1st USB controller contains some UTMI pad registers that are global for | |
66 | * all the controllers on the chip. Those registers are also cleared when | |
67 | * reset is asserted to the 1st controller. This means that the 1st controller | |
68 | * can only be reset when no other controlled has finished probing. So we'll | |
69 | * reset the 1st controller before doing any other setup on any of the | |
70 | * controllers, and then never again. | |
71 | * | |
72 | * Since this is a PHY issue, the Tegra PHY driver should probably be doing | |
73 | * the resetting of the USB controllers. But to keep compatibility with old | |
74 | * device trees that don't have reset phandles in the PHYs, do it here. | |
75 | * Those old DTs will be vulnerable to total USB breakage if the 1st EHCI | |
76 | * device isn't the first one to finish probing, so warn them. | |
77 | */ | |
78 | static int tegra_reset_usb_controller(struct platform_device *pdev) | |
79 | { | |
80 | struct device_node *phy_np; | |
81 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
82 | struct tegra_ehci_hcd *tegra = | |
83 | (struct tegra_ehci_hcd *)hcd_to_ehci(hcd)->priv; | |
84 | ||
85 | phy_np = of_parse_phandle(pdev->dev.of_node, "nvidia,phy", 0); | |
86 | if (!phy_np) | |
87 | return -ENOENT; | |
88 | ||
89 | if (!usb1_reset_attempted) { | |
90 | struct reset_control *usb1_reset; | |
91 | ||
92 | usb1_reset = of_reset_control_get(phy_np, "usb"); | |
93 | if (IS_ERR(usb1_reset)) { | |
94 | dev_warn(&pdev->dev, | |
95 | "can't get utmi-pads reset from the PHY\n"); | |
96 | dev_warn(&pdev->dev, | |
97 | "continuing, but please update your DT\n"); | |
98 | } else { | |
99 | reset_control_assert(usb1_reset); | |
100 | udelay(1); | |
101 | reset_control_deassert(usb1_reset); | |
102 | } | |
103 | ||
104 | reset_control_put(usb1_reset); | |
105 | usb1_reset_attempted = true; | |
106 | } | |
107 | ||
108 | if (!of_property_read_bool(phy_np, "nvidia,has-utmi-pad-registers")) { | |
109 | reset_control_assert(tegra->rst); | |
110 | udelay(1); | |
111 | reset_control_deassert(tegra->rst); | |
112 | } | |
113 | ||
114 | of_node_put(phy_np); | |
115 | ||
116 | return 0; | |
117 | } | |
118 | ||
1f594b64 JL |
119 | static int tegra_ehci_internal_port_reset( |
120 | struct ehci_hcd *ehci, | |
121 | u32 __iomem *portsc_reg | |
122 | ) | |
123 | { | |
124 | u32 temp; | |
125 | unsigned long flags; | |
126 | int retval = 0; | |
127 | int i, tries; | |
128 | u32 saved_usbintr; | |
129 | ||
130 | spin_lock_irqsave(&ehci->lock, flags); | |
131 | saved_usbintr = ehci_readl(ehci, &ehci->regs->intr_enable); | |
132 | /* disable USB interrupt */ | |
133 | ehci_writel(ehci, 0, &ehci->regs->intr_enable); | |
134 | spin_unlock_irqrestore(&ehci->lock, flags); | |
135 | ||
136 | /* | |
137 | * Here we have to do Port Reset at most twice for | |
138 | * Port Enable bit to be set. | |
139 | */ | |
140 | for (i = 0; i < 2; i++) { | |
141 | temp = ehci_readl(ehci, portsc_reg); | |
142 | temp |= PORT_RESET; | |
143 | ehci_writel(ehci, temp, portsc_reg); | |
144 | mdelay(10); | |
145 | temp &= ~PORT_RESET; | |
146 | ehci_writel(ehci, temp, portsc_reg); | |
147 | mdelay(1); | |
148 | tries = 100; | |
149 | do { | |
150 | mdelay(1); | |
151 | /* | |
152 | * Up to this point, Port Enable bit is | |
153 | * expected to be set after 2 ms waiting. | |
154 | * USB1 usually takes extra 45 ms, for safety, | |
155 | * we take 100 ms as timeout. | |
156 | */ | |
157 | temp = ehci_readl(ehci, portsc_reg); | |
158 | } while (!(temp & PORT_PE) && tries--); | |
159 | if (temp & PORT_PE) | |
160 | break; | |
161 | } | |
162 | if (i == 2) | |
163 | retval = -ETIMEDOUT; | |
164 | ||
165 | /* | |
166 | * Clear Connect Status Change bit if it's set. | |
167 | * We can't clear PORT_PEC. It will also cause PORT_PE to be cleared. | |
168 | */ | |
169 | if (temp & PORT_CSC) | |
170 | ehci_writel(ehci, PORT_CSC, portsc_reg); | |
171 | ||
172 | /* | |
173 | * Write to clear any interrupt status bits that might be set | |
174 | * during port reset. | |
175 | */ | |
176 | temp = ehci_readl(ehci, &ehci->regs->status); | |
177 | ehci_writel(ehci, temp, &ehci->regs->status); | |
178 | ||
179 | /* restore original interrupt enable bits */ | |
180 | ehci_writel(ehci, saved_usbintr, &ehci->regs->intr_enable); | |
181 | return retval; | |
182 | } | |
183 | ||
79ad3b5a BG |
184 | static int tegra_ehci_hub_control( |
185 | struct usb_hcd *hcd, | |
186 | u16 typeReq, | |
187 | u16 wValue, | |
188 | u16 wIndex, | |
189 | char *buf, | |
190 | u16 wLength | |
191 | ) | |
192 | { | |
c19d14d6 SW |
193 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
194 | struct tegra_ehci_hcd *tegra = (struct tegra_ehci_hcd *)ehci->priv; | |
79ad3b5a BG |
195 | u32 __iomem *status_reg; |
196 | u32 temp; | |
197 | unsigned long flags; | |
198 | int retval = 0; | |
199 | ||
200 | status_reg = &ehci->regs->port_status[(wIndex & 0xff) - 1]; | |
201 | ||
202 | spin_lock_irqsave(&ehci->lock, flags); | |
203 | ||
6d5f89c7 | 204 | if (typeReq == GetPortStatus) { |
79ad3b5a BG |
205 | temp = ehci_readl(ehci, status_reg); |
206 | if (tegra->port_resuming && !(temp & PORT_SUSPEND)) { | |
207 | /* Resume completed, re-enable disconnect detection */ | |
208 | tegra->port_resuming = 0; | |
3d46e73d | 209 | tegra_usb_phy_postresume(hcd->usb_phy); |
79ad3b5a BG |
210 | } |
211 | } | |
212 | ||
213 | else if (typeReq == SetPortFeature && wValue == USB_PORT_FEAT_SUSPEND) { | |
214 | temp = ehci_readl(ehci, status_reg); | |
215 | if ((temp & PORT_PE) == 0 || (temp & PORT_RESET) != 0) { | |
216 | retval = -EPIPE; | |
217 | goto done; | |
218 | } | |
219 | ||
b0876574 | 220 | temp &= ~(PORT_RWC_BITS | PORT_WKCONN_E); |
79ad3b5a BG |
221 | temp |= PORT_WKDISC_E | PORT_WKOC_E; |
222 | ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); | |
223 | ||
224 | /* | |
225 | * If a transaction is in progress, there may be a delay in | |
226 | * suspending the port. Poll until the port is suspended. | |
227 | */ | |
2f3a6b86 | 228 | if (ehci_handshake(ehci, status_reg, PORT_SUSPEND, |
79ad3b5a BG |
229 | PORT_SUSPEND, 5000)) |
230 | pr_err("%s: timeout waiting for SUSPEND\n", __func__); | |
231 | ||
232 | set_bit((wIndex & 0xff) - 1, &ehci->suspended_ports); | |
233 | goto done; | |
234 | } | |
235 | ||
1f594b64 | 236 | /* For USB1 port we need to issue Port Reset twice internally */ |
585355c5 | 237 | if (tegra->needs_double_reset && |
1f594b64 JL |
238 | (typeReq == SetPortFeature && wValue == USB_PORT_FEAT_RESET)) { |
239 | spin_unlock_irqrestore(&ehci->lock, flags); | |
240 | return tegra_ehci_internal_port_reset(ehci, status_reg); | |
241 | } | |
242 | ||
79ad3b5a BG |
243 | /* |
244 | * Tegra host controller will time the resume operation to clear the bit | |
245 | * when the port control state switches to HS or FS Idle. This behavior | |
246 | * is different from EHCI where the host controller driver is required | |
247 | * to set this bit to a zero after the resume duration is timed in the | |
248 | * driver. | |
249 | */ | |
250 | else if (typeReq == ClearPortFeature && | |
251 | wValue == USB_PORT_FEAT_SUSPEND) { | |
252 | temp = ehci_readl(ehci, status_reg); | |
253 | if ((temp & PORT_RESET) || !(temp & PORT_PE)) { | |
254 | retval = -EPIPE; | |
255 | goto done; | |
256 | } | |
257 | ||
258 | if (!(temp & PORT_SUSPEND)) | |
259 | goto done; | |
260 | ||
261 | /* Disable disconnect detection during port resume */ | |
3d46e73d | 262 | tegra_usb_phy_preresume(hcd->usb_phy); |
79ad3b5a BG |
263 | |
264 | ehci->reset_done[wIndex-1] = jiffies + msecs_to_jiffies(25); | |
265 | ||
266 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); | |
267 | /* start resume signalling */ | |
268 | ehci_writel(ehci, temp | PORT_RESUME, status_reg); | |
a448e4dc | 269 | set_bit(wIndex-1, &ehci->resuming_ports); |
79ad3b5a BG |
270 | |
271 | spin_unlock_irqrestore(&ehci->lock, flags); | |
272 | msleep(20); | |
273 | spin_lock_irqsave(&ehci->lock, flags); | |
274 | ||
275 | /* Poll until the controller clears RESUME and SUSPEND */ | |
2f3a6b86 | 276 | if (ehci_handshake(ehci, status_reg, PORT_RESUME, 0, 2000)) |
79ad3b5a | 277 | pr_err("%s: timeout waiting for RESUME\n", __func__); |
2f3a6b86 | 278 | if (ehci_handshake(ehci, status_reg, PORT_SUSPEND, 0, 2000)) |
79ad3b5a BG |
279 | pr_err("%s: timeout waiting for SUSPEND\n", __func__); |
280 | ||
281 | ehci->reset_done[wIndex-1] = 0; | |
a448e4dc | 282 | clear_bit(wIndex-1, &ehci->resuming_ports); |
79ad3b5a BG |
283 | |
284 | tegra->port_resuming = 1; | |
285 | goto done; | |
286 | } | |
287 | ||
288 | spin_unlock_irqrestore(&ehci->lock, flags); | |
289 | ||
290 | /* Handle the hub control events here */ | |
37769939 | 291 | return ehci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength); |
9fc5f24e | 292 | |
79ad3b5a BG |
293 | done: |
294 | spin_unlock_irqrestore(&ehci->lock, flags); | |
295 | return retval; | |
296 | } | |
297 | ||
fe375774 | 298 | struct dma_aligned_buffer { |
fbf9865c RM |
299 | void *kmalloc_ptr; |
300 | void *old_xfer_buffer; | |
301 | u8 data[0]; | |
302 | }; | |
303 | ||
fe375774 | 304 | static void free_dma_aligned_buffer(struct urb *urb) |
fbf9865c | 305 | { |
fe375774 | 306 | struct dma_aligned_buffer *temp; |
0efd937e | 307 | size_t length; |
fbf9865c RM |
308 | |
309 | if (!(urb->transfer_flags & URB_ALIGNED_TEMP_BUFFER)) | |
310 | return; | |
311 | ||
fe375774 VB |
312 | temp = container_of(urb->transfer_buffer, |
313 | struct dma_aligned_buffer, data); | |
fbf9865c | 314 | |
0efd937e JH |
315 | if (usb_urb_dir_in(urb)) { |
316 | if (usb_pipeisoc(urb->pipe)) | |
317 | length = urb->transfer_buffer_length; | |
318 | else | |
319 | length = urb->actual_length; | |
320 | ||
321 | memcpy(temp->old_xfer_buffer, temp->data, length); | |
322 | } | |
fbf9865c RM |
323 | urb->transfer_buffer = temp->old_xfer_buffer; |
324 | kfree(temp->kmalloc_ptr); | |
325 | ||
326 | urb->transfer_flags &= ~URB_ALIGNED_TEMP_BUFFER; | |
327 | } | |
328 | ||
fe375774 | 329 | static int alloc_dma_aligned_buffer(struct urb *urb, gfp_t mem_flags) |
fbf9865c | 330 | { |
fe375774 | 331 | struct dma_aligned_buffer *temp, *kmalloc_ptr; |
fbf9865c RM |
332 | size_t kmalloc_size; |
333 | ||
334 | if (urb->num_sgs || urb->sg || | |
335 | urb->transfer_buffer_length == 0 || | |
336 | !((uintptr_t)urb->transfer_buffer & (TEGRA_USB_DMA_ALIGN - 1))) | |
337 | return 0; | |
338 | ||
fbf9865c RM |
339 | /* Allocate a buffer with enough padding for alignment */ |
340 | kmalloc_size = urb->transfer_buffer_length + | |
fe375774 | 341 | sizeof(struct dma_aligned_buffer) + TEGRA_USB_DMA_ALIGN - 1; |
fbf9865c RM |
342 | |
343 | kmalloc_ptr = kmalloc(kmalloc_size, mem_flags); | |
344 | if (!kmalloc_ptr) | |
345 | return -ENOMEM; | |
346 | ||
fe375774 | 347 | /* Position our struct dma_aligned_buffer such that data is aligned */ |
fbf9865c | 348 | temp = PTR_ALIGN(kmalloc_ptr + 1, TEGRA_USB_DMA_ALIGN) - 1; |
fbf9865c RM |
349 | temp->kmalloc_ptr = kmalloc_ptr; |
350 | temp->old_xfer_buffer = urb->transfer_buffer; | |
fe375774 | 351 | if (usb_urb_dir_out(urb)) |
fbf9865c RM |
352 | memcpy(temp->data, urb->transfer_buffer, |
353 | urb->transfer_buffer_length); | |
354 | urb->transfer_buffer = temp->data; | |
355 | ||
356 | urb->transfer_flags |= URB_ALIGNED_TEMP_BUFFER; | |
357 | ||
358 | return 0; | |
359 | } | |
360 | ||
361 | static int tegra_ehci_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, | |
362 | gfp_t mem_flags) | |
363 | { | |
364 | int ret; | |
365 | ||
fe375774 | 366 | ret = alloc_dma_aligned_buffer(urb, mem_flags); |
fbf9865c RM |
367 | if (ret) |
368 | return ret; | |
369 | ||
370 | ret = usb_hcd_map_urb_for_dma(hcd, urb, mem_flags); | |
371 | if (ret) | |
fe375774 | 372 | free_dma_aligned_buffer(urb); |
fbf9865c RM |
373 | |
374 | return ret; | |
375 | } | |
376 | ||
377 | static void tegra_ehci_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) | |
378 | { | |
379 | usb_hcd_unmap_urb_for_dma(hcd, urb); | |
fe375774 | 380 | free_dma_aligned_buffer(urb); |
fbf9865c RM |
381 | } |
382 | ||
327d8b42 TT |
383 | static const struct tegra_ehci_soc_config tegra30_soc_config = { |
384 | .has_hostpc = true, | |
385 | }; | |
386 | ||
387 | static const struct tegra_ehci_soc_config tegra20_soc_config = { | |
388 | .has_hostpc = false, | |
389 | }; | |
390 | ||
1b45049a | 391 | static const struct of_device_id tegra_ehci_of_match[] = { |
327d8b42 TT |
392 | { .compatible = "nvidia,tegra30-ehci", .data = &tegra30_soc_config }, |
393 | { .compatible = "nvidia,tegra20-ehci", .data = &tegra20_soc_config }, | |
394 | { }, | |
395 | }; | |
396 | ||
79ad3b5a BG |
397 | static int tegra_ehci_probe(struct platform_device *pdev) |
398 | { | |
327d8b42 TT |
399 | const struct of_device_id *match; |
400 | const struct tegra_ehci_soc_config *soc_config; | |
79ad3b5a BG |
401 | struct resource *res; |
402 | struct usb_hcd *hcd; | |
c19d14d6 | 403 | struct ehci_hcd *ehci; |
79ad3b5a | 404 | struct tegra_ehci_hcd *tegra; |
79ad3b5a BG |
405 | int err = 0; |
406 | int irq; | |
bbdabdb6 | 407 | struct usb_phy *u_phy; |
79ad3b5a | 408 | |
327d8b42 TT |
409 | match = of_match_device(tegra_ehci_of_match, &pdev->dev); |
410 | if (!match) { | |
411 | dev_err(&pdev->dev, "Error: No device match found\n"); | |
412 | return -ENODEV; | |
413 | } | |
414 | soc_config = match->data; | |
415 | ||
4a53f4e6 OJ |
416 | /* Right now device-tree probed devices don't get dma_mask set. |
417 | * Since shared usb code relies on it, set it here for now. | |
418 | * Once we have dma capability bindings this can go away. | |
419 | */ | |
e1fd7341 | 420 | err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); |
22d9d8e8 RK |
421 | if (err) |
422 | return err; | |
4a53f4e6 | 423 | |
c19d14d6 SW |
424 | hcd = usb_create_hcd(&tegra_ehci_hc_driver, &pdev->dev, |
425 | dev_name(&pdev->dev)); | |
426 | if (!hcd) { | |
427 | dev_err(&pdev->dev, "Unable to create HCD\n"); | |
f5b8c8b6 | 428 | return -ENOMEM; |
c19d14d6 SW |
429 | } |
430 | platform_set_drvdata(pdev, hcd); | |
431 | ehci = hcd_to_ehci(hcd); | |
432 | tegra = (struct tegra_ehci_hcd *)ehci->priv; | |
433 | ||
434 | hcd->has_tt = 1; | |
79ad3b5a | 435 | |
bc2ff98f | 436 | tegra->clk = devm_clk_get(&pdev->dev, NULL); |
79ad3b5a BG |
437 | if (IS_ERR(tegra->clk)) { |
438 | dev_err(&pdev->dev, "Can't get ehci clock\n"); | |
c19d14d6 SW |
439 | err = PTR_ERR(tegra->clk); |
440 | goto cleanup_hcd_create; | |
79ad3b5a BG |
441 | } |
442 | ||
75606f5d SW |
443 | tegra->rst = devm_reset_control_get(&pdev->dev, "usb"); |
444 | if (IS_ERR(tegra->rst)) { | |
445 | dev_err(&pdev->dev, "Can't get ehci reset\n"); | |
446 | err = PTR_ERR(tegra->rst); | |
447 | goto cleanup_hcd_create; | |
448 | } | |
449 | ||
20de12cc | 450 | err = clk_prepare_enable(tegra->clk); |
79ad3b5a | 451 | if (err) |
dafbe92e | 452 | goto cleanup_hcd_create; |
79ad3b5a | 453 | |
a47cc24c TT |
454 | err = tegra_reset_usb_controller(pdev); |
455 | if (err) | |
456 | goto cleanup_clk_en; | |
eb5369ed | 457 | |
7db71a9a | 458 | u_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "nvidia,phy", 0); |
2d22b42d | 459 | if (IS_ERR(u_phy)) { |
f56e67f0 | 460 | err = -EPROBE_DEFER; |
c19d14d6 | 461 | goto cleanup_clk_en; |
2d22b42d | 462 | } |
3d46e73d | 463 | hcd->usb_phy = u_phy; |
2d22b42d | 464 | |
585355c5 VB |
465 | tegra->needs_double_reset = of_property_read_bool(pdev->dev.of_node, |
466 | "nvidia,needs-double-reset"); | |
467 | ||
79ad3b5a | 468 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
6ba96dce VG |
469 | hcd->regs = devm_ioremap_resource(&pdev->dev, res); |
470 | if (IS_ERR(hcd->regs)) { | |
471 | err = PTR_ERR(hcd->regs); | |
c19d14d6 | 472 | goto cleanup_clk_en; |
4a53f4e6 | 473 | } |
a36cc423 VB |
474 | hcd->rsrc_start = res->start; |
475 | hcd->rsrc_len = resource_size(res); | |
476 | ||
c19d14d6 | 477 | ehci->caps = hcd->regs + 0x100; |
327d8b42 | 478 | ehci->has_hostpc = soc_config->has_hostpc; |
4a53f4e6 | 479 | |
3d46e73d | 480 | err = usb_phy_init(hcd->usb_phy); |
2d22b42d VB |
481 | if (err) { |
482 | dev_err(&pdev->dev, "Failed to initialize phy\n"); | |
c19d14d6 | 483 | goto cleanup_clk_en; |
79ad3b5a BG |
484 | } |
485 | ||
bbdabdb6 VB |
486 | u_phy->otg = devm_kzalloc(&pdev->dev, sizeof(struct usb_otg), |
487 | GFP_KERNEL); | |
488 | if (!u_phy->otg) { | |
bbdabdb6 | 489 | err = -ENOMEM; |
2d22b42d | 490 | goto cleanup_phy; |
bbdabdb6 VB |
491 | } |
492 | u_phy->otg->host = hcd_to_bus(hcd); | |
493 | ||
3d46e73d | 494 | err = usb_phy_set_suspend(hcd->usb_phy, 0); |
79ad3b5a BG |
495 | if (err) { |
496 | dev_err(&pdev->dev, "Failed to power on the phy\n"); | |
2d22b42d | 497 | goto cleanup_phy; |
79ad3b5a BG |
498 | } |
499 | ||
79ad3b5a BG |
500 | irq = platform_get_irq(pdev, 0); |
501 | if (!irq) { | |
502 | dev_err(&pdev->dev, "Failed to get IRQ\n"); | |
503 | err = -ENODEV; | |
2d22b42d | 504 | goto cleanup_phy; |
79ad3b5a | 505 | } |
79ad3b5a | 506 | |
de3f2337 | 507 | otg_set_host(u_phy->otg, &hcd->self); |
79ad3b5a | 508 | |
b5dd18d8 | 509 | err = usb_add_hcd(hcd, irq, IRQF_SHARED); |
79ad3b5a BG |
510 | if (err) { |
511 | dev_err(&pdev->dev, "Failed to add USB HCD\n"); | |
de3f2337 | 512 | goto cleanup_otg_set_host; |
79ad3b5a | 513 | } |
3c9740a1 | 514 | device_wakeup_enable(hcd->self.controller); |
79ad3b5a BG |
515 | |
516 | return err; | |
517 | ||
de3f2337 TT |
518 | cleanup_otg_set_host: |
519 | otg_set_host(u_phy->otg, NULL); | |
8fefcfdd | 520 | cleanup_phy: |
3d46e73d | 521 | usb_phy_shutdown(hcd->usb_phy); |
c19d14d6 SW |
522 | cleanup_clk_en: |
523 | clk_disable_unprepare(tegra->clk); | |
2d22b42d | 524 | cleanup_hcd_create: |
79ad3b5a | 525 | usb_put_hcd(hcd); |
79ad3b5a BG |
526 | return err; |
527 | } | |
528 | ||
79ad3b5a BG |
529 | static int tegra_ehci_remove(struct platform_device *pdev) |
530 | { | |
c19d14d6 SW |
531 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
532 | struct tegra_ehci_hcd *tegra = | |
533 | (struct tegra_ehci_hcd *)hcd_to_ehci(hcd)->priv; | |
79ad3b5a | 534 | |
3d46e73d | 535 | otg_set_host(hcd->usb_phy->otg, NULL); |
79ad3b5a | 536 | |
3d46e73d | 537 | usb_phy_shutdown(hcd->usb_phy); |
79ad3b5a | 538 | usb_remove_hcd(hcd); |
ecc8a0cd | 539 | |
20de12cc | 540 | clk_disable_unprepare(tegra->clk); |
79ad3b5a | 541 | |
6a70b621 TT |
542 | usb_put_hcd(hcd); |
543 | ||
79ad3b5a BG |
544 | return 0; |
545 | } | |
546 | ||
547 | static void tegra_ehci_hcd_shutdown(struct platform_device *pdev) | |
548 | { | |
c19d14d6 | 549 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
79ad3b5a BG |
550 | |
551 | if (hcd->driver->shutdown) | |
552 | hcd->driver->shutdown(hcd); | |
553 | } | |
554 | ||
555 | static struct platform_driver tegra_ehci_driver = { | |
556 | .probe = tegra_ehci_probe, | |
557 | .remove = tegra_ehci_remove, | |
79ad3b5a BG |
558 | .shutdown = tegra_ehci_hcd_shutdown, |
559 | .driver = { | |
9fc5f24e | 560 | .name = DRV_NAME, |
4a53f4e6 | 561 | .of_match_table = tegra_ehci_of_match, |
79ad3b5a BG |
562 | } |
563 | }; | |
9fc5f24e | 564 | |
4f2fe2d2 SW |
565 | static int tegra_ehci_reset(struct usb_hcd *hcd) |
566 | { | |
567 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
568 | int retval; | |
569 | int txfifothresh; | |
570 | ||
571 | retval = ehci_setup(hcd); | |
572 | if (retval) | |
573 | return retval; | |
574 | ||
575 | /* | |
576 | * We should really pull this value out of tegra_ehci_soc_config, but | |
577 | * to avoid needing access to it, make use of the fact that Tegra20 is | |
578 | * the only one so far that needs a value of 10, and Tegra20 is the | |
579 | * only one which doesn't set has_hostpc. | |
580 | */ | |
581 | txfifothresh = ehci->has_hostpc ? 0x10 : 10; | |
582 | ehci_writel(ehci, txfifothresh << 16, &ehci->regs->txfill_tuning); | |
583 | ||
584 | return 0; | |
585 | } | |
586 | ||
9fc5f24e MG |
587 | static const struct ehci_driver_overrides tegra_overrides __initconst = { |
588 | .extra_priv_size = sizeof(struct tegra_ehci_hcd), | |
4f2fe2d2 | 589 | .reset = tegra_ehci_reset, |
9fc5f24e MG |
590 | }; |
591 | ||
592 | static int __init ehci_tegra_init(void) | |
593 | { | |
594 | if (usb_disabled()) | |
595 | return -ENODEV; | |
596 | ||
597 | pr_info(DRV_NAME ": " DRIVER_DESC "\n"); | |
598 | ||
599 | ehci_init_driver(&tegra_ehci_hc_driver, &tegra_overrides); | |
600 | ||
601 | /* | |
602 | * The Tegra HW has some unusual quirks, which require Tegra-specific | |
603 | * workarounds. We override certain hc_driver functions here to | |
604 | * achieve that. We explicitly do not enhance ehci_driver_overrides to | |
605 | * allow this more easily, since this is an unusual case, and we don't | |
606 | * want to encourage others to override these functions by making it | |
607 | * too easy. | |
608 | */ | |
609 | ||
9fc5f24e MG |
610 | tegra_ehci_hc_driver.map_urb_for_dma = tegra_ehci_map_urb_for_dma; |
611 | tegra_ehci_hc_driver.unmap_urb_for_dma = tegra_ehci_unmap_urb_for_dma; | |
612 | tegra_ehci_hc_driver.hub_control = tegra_ehci_hub_control; | |
613 | ||
614 | return platform_driver_register(&tegra_ehci_driver); | |
615 | } | |
616 | module_init(ehci_tegra_init); | |
617 | ||
618 | static void __exit ehci_tegra_cleanup(void) | |
619 | { | |
620 | platform_driver_unregister(&tegra_ehci_driver); | |
621 | } | |
622 | module_exit(ehci_tegra_cleanup); | |
623 | ||
624 | MODULE_DESCRIPTION(DRIVER_DESC); | |
625 | MODULE_LICENSE("GPL"); | |
626 | MODULE_ALIAS("platform:" DRV_NAME); | |
627 | MODULE_DEVICE_TABLE(of, tegra_ehci_of_match); |