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3429e91a SAS |
1 | /* |
2 | * xhci-plat.c - xHCI host controller driver platform Bus Glue. | |
3 | * | |
4 | * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com | |
5 | * Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> | |
6 | * | |
7 | * A lot of code borrowed from the Linux xHCI driver. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License | |
11 | * version 2 as published by the Free Software Foundation. | |
12 | */ | |
13 | ||
4718c177 | 14 | #include <linux/clk.h> |
48157bb9 | 15 | #include <linux/dma-mapping.h> |
3429e91a | 16 | #include <linux/module.h> |
1fe6c452 | 17 | #include <linux/of.h> |
48157bb9 | 18 | #include <linux/platform_device.h> |
7b8ef22e | 19 | #include <linux/usb/phy.h> |
48157bb9 | 20 | #include <linux/slab.h> |
20f6fdd0 | 21 | #include <linux/usb/xhci_pdriver.h> |
579085b5 | 22 | #include <linux/acpi.h> |
3429e91a SAS |
23 | |
24 | #include "xhci.h" | |
4efb2f69 | 25 | #include "xhci-plat.h" |
97374792 | 26 | #include "xhci-mvebu.h" |
4ac8918f | 27 | #include "xhci-rcar.h" |
3429e91a | 28 | |
1885d9a3 AB |
29 | static struct hc_driver __read_mostly xhci_plat_hc_driver; |
30 | ||
cd33a321 RQ |
31 | static int xhci_plat_setup(struct usb_hcd *hcd); |
32 | static int xhci_plat_start(struct usb_hcd *hcd); | |
33 | ||
34 | static const struct xhci_driver_overrides xhci_plat_overrides __initconst = { | |
4efb2f69 | 35 | .extra_priv_size = sizeof(struct xhci_plat_priv), |
cd33a321 RQ |
36 | .reset = xhci_plat_setup, |
37 | .start = xhci_plat_start, | |
38 | }; | |
39 | ||
b1c127ae | 40 | static void xhci_priv_plat_start(struct usb_hcd *hcd) |
3429e91a | 41 | { |
b1c127ae FB |
42 | struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd); |
43 | ||
44 | if (priv->plat_start) | |
45 | priv->plat_start(hcd); | |
46 | } | |
47 | ||
48 | static int xhci_priv_init_quirk(struct usb_hcd *hcd) | |
49 | { | |
50 | struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd); | |
51 | ||
52 | if (!priv->init_quirk) | |
53 | return 0; | |
54 | ||
55 | return priv->init_quirk(hcd); | |
56 | } | |
5ad3b03e | 57 | |
b1c127ae FB |
58 | static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci) |
59 | { | |
3429e91a SAS |
60 | /* |
61 | * As of now platform drivers don't provide MSI support so we ensure | |
62 | * here that the generic code does not try to make a pci_dev from our | |
63 | * dev struct in order to setup MSI | |
64 | */ | |
52fb6125 | 65 | xhci->quirks |= XHCI_PLAT; |
3429e91a SAS |
66 | } |
67 | ||
68 | /* called during probe() after chip reset completes */ | |
69 | static int xhci_plat_setup(struct usb_hcd *hcd) | |
70 | { | |
4ac8918f YS |
71 | int ret; |
72 | ||
4ac8918f | 73 | |
b1c127ae FB |
74 | ret = xhci_priv_init_quirk(hcd); |
75 | if (ret) | |
76 | return ret; | |
3bdb263d | 77 | |
3429e91a SAS |
78 | return xhci_gen_setup(hcd, xhci_plat_quirks); |
79 | } | |
80 | ||
94adcdce YS |
81 | static int xhci_plat_start(struct usb_hcd *hcd) |
82 | { | |
b1c127ae | 83 | xhci_priv_plat_start(hcd); |
94adcdce YS |
84 | return xhci_run(hcd); |
85 | } | |
86 | ||
4efb2f69 YS |
87 | #ifdef CONFIG_OF |
88 | static const struct xhci_plat_priv xhci_plat_marvell_armada = { | |
b1c127ae | 89 | .init_quirk = xhci_mvebu_mbus_init_quirk, |
4efb2f69 YS |
90 | }; |
91 | ||
92 | static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen2 = { | |
9bf9d9d6 | 93 | .firmware_name = XHCI_RCAR_FIRMWARE_NAME_V1, |
b1c127ae FB |
94 | .init_quirk = xhci_rcar_init_quirk, |
95 | .plat_start = xhci_rcar_start, | |
4efb2f69 YS |
96 | }; |
97 | ||
526a240f | 98 | static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen3 = { |
526a240f | 99 | .firmware_name = XHCI_RCAR_FIRMWARE_NAME_V2, |
b1c127ae FB |
100 | .init_quirk = xhci_rcar_init_quirk, |
101 | .plat_start = xhci_rcar_start, | |
526a240f YS |
102 | }; |
103 | ||
4efb2f69 YS |
104 | static const struct of_device_id usb_xhci_of_match[] = { |
105 | { | |
106 | .compatible = "generic-xhci", | |
107 | }, { | |
108 | .compatible = "xhci-platform", | |
109 | }, { | |
110 | .compatible = "marvell,armada-375-xhci", | |
111 | .data = &xhci_plat_marvell_armada, | |
112 | }, { | |
113 | .compatible = "marvell,armada-380-xhci", | |
114 | .data = &xhci_plat_marvell_armada, | |
115 | }, { | |
116 | .compatible = "renesas,xhci-r8a7790", | |
117 | .data = &xhci_plat_renesas_rcar_gen2, | |
118 | }, { | |
119 | .compatible = "renesas,xhci-r8a7791", | |
120 | .data = &xhci_plat_renesas_rcar_gen2, | |
82487b71 YS |
121 | }, { |
122 | .compatible = "renesas,xhci-r8a7793", | |
123 | .data = &xhci_plat_renesas_rcar_gen2, | |
526a240f YS |
124 | }, { |
125 | .compatible = "renesas,xhci-r8a7795", | |
126 | .data = &xhci_plat_renesas_rcar_gen3, | |
4efb2f69 | 127 | }, { |
f1bbdc3b SH |
128 | .compatible = "renesas,rcar-gen2-xhci", |
129 | .data = &xhci_plat_renesas_rcar_gen2, | |
130 | }, { | |
131 | .compatible = "renesas,rcar-gen3-xhci", | |
132 | .data = &xhci_plat_renesas_rcar_gen3, | |
4efb2f69 | 133 | }, |
ff075d67 | 134 | {}, |
4efb2f69 YS |
135 | }; |
136 | MODULE_DEVICE_TABLE(of, usb_xhci_of_match); | |
137 | #endif | |
138 | ||
3429e91a SAS |
139 | static int xhci_plat_probe(struct platform_device *pdev) |
140 | { | |
20f6fdd0 PA |
141 | struct device_node *node = pdev->dev.of_node; |
142 | struct usb_xhci_pdata *pdata = dev_get_platdata(&pdev->dev); | |
4efb2f69 | 143 | const struct of_device_id *match; |
3429e91a SAS |
144 | const struct hc_driver *driver; |
145 | struct xhci_hcd *xhci; | |
146 | struct resource *res; | |
147 | struct usb_hcd *hcd; | |
4718c177 | 148 | struct clk *clk; |
3429e91a SAS |
149 | int ret; |
150 | int irq; | |
151 | ||
152 | if (usb_disabled()) | |
153 | return -ENODEV; | |
154 | ||
1885d9a3 | 155 | driver = &xhci_plat_hc_driver; |
3429e91a SAS |
156 | |
157 | irq = platform_get_irq(pdev, 0); | |
158 | if (irq < 0) | |
159 | return -ENODEV; | |
160 | ||
0ebbe398 DD |
161 | /* Try to set 64-bit DMA first */ |
162 | if (WARN_ON(!pdev->dev.dma_mask)) | |
163 | /* Platform did not initialize dma_mask */ | |
164 | ret = dma_coerce_mask_and_coherent(&pdev->dev, | |
165 | DMA_BIT_MASK(64)); | |
c10cf118 | 166 | else |
0ebbe398 DD |
167 | ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); |
168 | ||
169 | /* If seting 64-bit DMA mask fails, fall back to 32-bit DMA mask */ | |
170 | if (ret) { | |
171 | ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); | |
172 | if (ret) | |
173 | return ret; | |
174 | } | |
c10cf118 | 175 | |
3429e91a SAS |
176 | hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev)); |
177 | if (!hcd) | |
178 | return -ENOMEM; | |
179 | ||
e7020f19 | 180 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
fd666348 HS |
181 | hcd->regs = devm_ioremap_resource(&pdev->dev, res); |
182 | if (IS_ERR(hcd->regs)) { | |
183 | ret = PTR_ERR(hcd->regs); | |
3429e91a SAS |
184 | goto put_hcd; |
185 | } | |
186 | ||
e7020f19 VB |
187 | hcd->rsrc_start = res->start; |
188 | hcd->rsrc_len = resource_size(res); | |
189 | ||
4718c177 GC |
190 | /* |
191 | * Not all platforms have a clk so it is not an error if the | |
192 | * clock does not exists. | |
193 | */ | |
194 | clk = devm_clk_get(&pdev->dev, NULL); | |
195 | if (!IS_ERR(clk)) { | |
196 | ret = clk_prepare_enable(clk); | |
197 | if (ret) | |
fd666348 | 198 | goto put_hcd; |
de95c40d TP |
199 | } else if (PTR_ERR(clk) == -EPROBE_DEFER) { |
200 | ret = -EPROBE_DEFER; | |
201 | goto put_hcd; | |
4718c177 GC |
202 | } |
203 | ||
4efb2f69 YS |
204 | xhci = hcd_to_xhci(hcd); |
205 | match = of_match_node(usb_xhci_of_match, node); | |
206 | if (match) { | |
207 | const struct xhci_plat_priv *priv_match = match->data; | |
208 | struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd); | |
209 | ||
210 | /* Just copy data for now */ | |
2ad294d5 GC |
211 | if (priv_match) |
212 | *priv = *priv_match; | |
4efb2f69 YS |
213 | } |
214 | ||
3c9740a1 | 215 | device_wakeup_enable(hcd->self.controller); |
3429e91a | 216 | |
4718c177 | 217 | xhci->clk = clk; |
9fa733f2 | 218 | xhci->main_hcd = hcd; |
3429e91a SAS |
219 | xhci->shared_hcd = usb_create_shared_hcd(driver, &pdev->dev, |
220 | dev_name(&pdev->dev), hcd); | |
221 | if (!xhci->shared_hcd) { | |
222 | ret = -ENOMEM; | |
4ac53087 | 223 | goto disable_clk; |
3429e91a SAS |
224 | } |
225 | ||
20f6fdd0 PA |
226 | if ((node && of_property_read_bool(node, "usb3-lpm-capable")) || |
227 | (pdata && pdata->usb3_lpm_capable)) | |
228 | xhci->quirks |= XHCI_LPM_SUPPORT; | |
3429e91a | 229 | |
14aec589 ON |
230 | if (HCC_MAX_PSA(xhci->hcc_params) >= 4) |
231 | xhci->shared_hcd->can_do_streams = 1; | |
232 | ||
7b8ef22e MR |
233 | hcd->usb_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0); |
234 | if (IS_ERR(hcd->usb_phy)) { | |
235 | ret = PTR_ERR(hcd->usb_phy); | |
236 | if (ret == -EPROBE_DEFER) | |
237 | goto put_usb3_hcd; | |
238 | hcd->usb_phy = NULL; | |
239 | } else { | |
240 | ret = usb_phy_init(hcd->usb_phy); | |
241 | if (ret) | |
242 | goto put_usb3_hcd; | |
243 | } | |
244 | ||
4ac53087 | 245 | ret = usb_add_hcd(hcd, irq, IRQF_SHARED); |
3429e91a | 246 | if (ret) |
7b8ef22e | 247 | goto disable_usb_phy; |
3429e91a | 248 | |
4ac53087 RQ |
249 | ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED); |
250 | if (ret) | |
251 | goto dealloc_usb2_hcd; | |
252 | ||
3429e91a SAS |
253 | return 0; |
254 | ||
4ac53087 RQ |
255 | |
256 | dealloc_usb2_hcd: | |
257 | usb_remove_hcd(hcd); | |
258 | ||
7b8ef22e MR |
259 | disable_usb_phy: |
260 | usb_phy_shutdown(hcd->usb_phy); | |
261 | ||
3429e91a SAS |
262 | put_usb3_hcd: |
263 | usb_put_hcd(xhci->shared_hcd); | |
264 | ||
4718c177 GC |
265 | disable_clk: |
266 | if (!IS_ERR(clk)) | |
267 | clk_disable_unprepare(clk); | |
268 | ||
3429e91a SAS |
269 | put_hcd: |
270 | usb_put_hcd(hcd); | |
271 | ||
272 | return ret; | |
273 | } | |
274 | ||
275 | static int xhci_plat_remove(struct platform_device *dev) | |
276 | { | |
277 | struct usb_hcd *hcd = platform_get_drvdata(dev); | |
278 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
4718c177 | 279 | struct clk *clk = xhci->clk; |
3429e91a SAS |
280 | |
281 | usb_remove_hcd(xhci->shared_hcd); | |
7b8ef22e | 282 | usb_phy_shutdown(hcd->usb_phy); |
3429e91a SAS |
283 | |
284 | usb_remove_hcd(hcd); | |
4ac53087 RQ |
285 | usb_put_hcd(xhci->shared_hcd); |
286 | ||
4718c177 GC |
287 | if (!IS_ERR(clk)) |
288 | clk_disable_unprepare(clk); | |
3429e91a | 289 | usb_put_hcd(hcd); |
3429e91a SAS |
290 | |
291 | return 0; | |
292 | } | |
293 | ||
274f6afa | 294 | #ifdef CONFIG_PM_SLEEP |
57d04eb1 VS |
295 | static int xhci_plat_suspend(struct device *dev) |
296 | { | |
297 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
298 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
299 | ||
a1377e53 LB |
300 | /* |
301 | * xhci_suspend() needs `do_wakeup` to know whether host is allowed | |
302 | * to do wakeup during suspend. Since xhci_plat_suspend is currently | |
303 | * only designed for system suspend, device_may_wakeup() is enough | |
304 | * to dertermine whether host is allowed to do wakeup. Need to | |
305 | * reconsider this when xhci_plat_suspend enlarges its scope, e.g., | |
306 | * also applies to runtime suspend. | |
307 | */ | |
308 | return xhci_suspend(xhci, device_may_wakeup(dev)); | |
57d04eb1 VS |
309 | } |
310 | ||
311 | static int xhci_plat_resume(struct device *dev) | |
312 | { | |
313 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
314 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
315 | ||
316 | return xhci_resume(xhci, 0); | |
317 | } | |
318 | ||
319 | static const struct dev_pm_ops xhci_plat_pm_ops = { | |
320 | SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume) | |
321 | }; | |
322 | #define DEV_PM_OPS (&xhci_plat_pm_ops) | |
323 | #else | |
324 | #define DEV_PM_OPS NULL | |
325 | #endif /* CONFIG_PM */ | |
326 | ||
579085b5 DD |
327 | static const struct acpi_device_id usb_xhci_acpi_match[] = { |
328 | /* XHCI-compliant USB Controller */ | |
329 | { "PNP0D10", }, | |
330 | { } | |
331 | }; | |
332 | MODULE_DEVICE_TABLE(acpi, usb_xhci_acpi_match); | |
333 | ||
3429e91a SAS |
334 | static struct platform_driver usb_xhci_driver = { |
335 | .probe = xhci_plat_probe, | |
336 | .remove = xhci_plat_remove, | |
337 | .driver = { | |
338 | .name = "xhci-hcd", | |
57d04eb1 | 339 | .pm = DEV_PM_OPS, |
1fe6c452 | 340 | .of_match_table = of_match_ptr(usb_xhci_of_match), |
579085b5 | 341 | .acpi_match_table = ACPI_PTR(usb_xhci_acpi_match), |
3429e91a SAS |
342 | }, |
343 | }; | |
344 | MODULE_ALIAS("platform:xhci-hcd"); | |
345 | ||
29e409f0 | 346 | static int __init xhci_plat_init(void) |
3429e91a | 347 | { |
cd33a321 | 348 | xhci_init_driver(&xhci_plat_hc_driver, &xhci_plat_overrides); |
3429e91a SAS |
349 | return platform_driver_register(&usb_xhci_driver); |
350 | } | |
29e409f0 | 351 | module_init(xhci_plat_init); |
3429e91a | 352 | |
29e409f0 | 353 | static void __exit xhci_plat_exit(void) |
3429e91a SAS |
354 | { |
355 | platform_driver_unregister(&usb_xhci_driver); | |
356 | } | |
29e409f0 AB |
357 | module_exit(xhci_plat_exit); |
358 | ||
359 | MODULE_DESCRIPTION("xHCI Platform Host Controller Driver"); | |
360 | MODULE_LICENSE("GPL"); |