Commit | Line | Data |
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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 | ||
3429e91a SAS |
40 | static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci) |
41 | { | |
42 | /* | |
43 | * As of now platform drivers don't provide MSI support so we ensure | |
44 | * here that the generic code does not try to make a pci_dev from our | |
45 | * dev struct in order to setup MSI | |
46 | */ | |
52fb6125 | 47 | xhci->quirks |= XHCI_PLAT; |
3429e91a SAS |
48 | } |
49 | ||
50 | /* called during probe() after chip reset completes */ | |
51 | static int xhci_plat_setup(struct usb_hcd *hcd) | |
52 | { | |
4ac8918f YS |
53 | int ret; |
54 | ||
4efb2f69 | 55 | if (xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2)) { |
4ac8918f YS |
56 | ret = xhci_rcar_init_quirk(hcd); |
57 | if (ret) | |
58 | return ret; | |
59 | } | |
60 | ||
3429e91a SAS |
61 | return xhci_gen_setup(hcd, xhci_plat_quirks); |
62 | } | |
63 | ||
94adcdce YS |
64 | static int xhci_plat_start(struct usb_hcd *hcd) |
65 | { | |
4efb2f69 | 66 | if (xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2)) |
4ac8918f YS |
67 | xhci_rcar_start(hcd); |
68 | ||
94adcdce YS |
69 | return xhci_run(hcd); |
70 | } | |
71 | ||
4efb2f69 YS |
72 | #ifdef CONFIG_OF |
73 | static const struct xhci_plat_priv xhci_plat_marvell_armada = { | |
74 | .type = XHCI_PLAT_TYPE_MARVELL_ARMADA, | |
75 | }; | |
76 | ||
77 | static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen2 = { | |
78 | .type = XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2, | |
79 | }; | |
80 | ||
81 | static const struct of_device_id usb_xhci_of_match[] = { | |
82 | { | |
83 | .compatible = "generic-xhci", | |
84 | }, { | |
85 | .compatible = "xhci-platform", | |
86 | }, { | |
87 | .compatible = "marvell,armada-375-xhci", | |
88 | .data = &xhci_plat_marvell_armada, | |
89 | }, { | |
90 | .compatible = "marvell,armada-380-xhci", | |
91 | .data = &xhci_plat_marvell_armada, | |
92 | }, { | |
93 | .compatible = "renesas,xhci-r8a7790", | |
94 | .data = &xhci_plat_renesas_rcar_gen2, | |
95 | }, { | |
96 | .compatible = "renesas,xhci-r8a7791", | |
97 | .data = &xhci_plat_renesas_rcar_gen2, | |
98 | }, { | |
99 | }, | |
100 | }; | |
101 | MODULE_DEVICE_TABLE(of, usb_xhci_of_match); | |
102 | #endif | |
103 | ||
3429e91a SAS |
104 | static int xhci_plat_probe(struct platform_device *pdev) |
105 | { | |
20f6fdd0 PA |
106 | struct device_node *node = pdev->dev.of_node; |
107 | struct usb_xhci_pdata *pdata = dev_get_platdata(&pdev->dev); | |
4efb2f69 | 108 | const struct of_device_id *match; |
3429e91a SAS |
109 | const struct hc_driver *driver; |
110 | struct xhci_hcd *xhci; | |
111 | struct resource *res; | |
112 | struct usb_hcd *hcd; | |
4718c177 | 113 | struct clk *clk; |
3429e91a SAS |
114 | int ret; |
115 | int irq; | |
116 | ||
117 | if (usb_disabled()) | |
118 | return -ENODEV; | |
119 | ||
1885d9a3 | 120 | driver = &xhci_plat_hc_driver; |
3429e91a SAS |
121 | |
122 | irq = platform_get_irq(pdev, 0); | |
123 | if (irq < 0) | |
124 | return -ENODEV; | |
125 | ||
0ebbe398 DD |
126 | /* Try to set 64-bit DMA first */ |
127 | if (WARN_ON(!pdev->dev.dma_mask)) | |
128 | /* Platform did not initialize dma_mask */ | |
129 | ret = dma_coerce_mask_and_coherent(&pdev->dev, | |
130 | DMA_BIT_MASK(64)); | |
c10cf118 | 131 | else |
0ebbe398 DD |
132 | ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); |
133 | ||
134 | /* If seting 64-bit DMA mask fails, fall back to 32-bit DMA mask */ | |
135 | if (ret) { | |
136 | ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); | |
137 | if (ret) | |
138 | return ret; | |
139 | } | |
c10cf118 | 140 | |
3429e91a SAS |
141 | hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev)); |
142 | if (!hcd) | |
143 | return -ENOMEM; | |
144 | ||
e7020f19 | 145 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
fd666348 HS |
146 | hcd->regs = devm_ioremap_resource(&pdev->dev, res); |
147 | if (IS_ERR(hcd->regs)) { | |
148 | ret = PTR_ERR(hcd->regs); | |
3429e91a SAS |
149 | goto put_hcd; |
150 | } | |
151 | ||
e7020f19 VB |
152 | hcd->rsrc_start = res->start; |
153 | hcd->rsrc_len = resource_size(res); | |
154 | ||
4718c177 GC |
155 | /* |
156 | * Not all platforms have a clk so it is not an error if the | |
157 | * clock does not exists. | |
158 | */ | |
159 | clk = devm_clk_get(&pdev->dev, NULL); | |
160 | if (!IS_ERR(clk)) { | |
161 | ret = clk_prepare_enable(clk); | |
162 | if (ret) | |
fd666348 | 163 | goto put_hcd; |
4718c177 GC |
164 | } |
165 | ||
4efb2f69 YS |
166 | xhci = hcd_to_xhci(hcd); |
167 | match = of_match_node(usb_xhci_of_match, node); | |
168 | if (match) { | |
169 | const struct xhci_plat_priv *priv_match = match->data; | |
170 | struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd); | |
171 | ||
172 | /* Just copy data for now */ | |
173 | *priv = *priv_match; | |
174 | } | |
175 | ||
176 | if (xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_MARVELL_ARMADA)) { | |
1e7e4fb6 MR |
177 | ret = xhci_mvebu_mbus_init_quirk(pdev); |
178 | if (ret) | |
179 | goto disable_clk; | |
180 | } | |
181 | ||
3c9740a1 | 182 | device_wakeup_enable(hcd->self.controller); |
3429e91a | 183 | |
4718c177 | 184 | xhci->clk = clk; |
9fa733f2 | 185 | xhci->main_hcd = hcd; |
3429e91a SAS |
186 | xhci->shared_hcd = usb_create_shared_hcd(driver, &pdev->dev, |
187 | dev_name(&pdev->dev), hcd); | |
188 | if (!xhci->shared_hcd) { | |
189 | ret = -ENOMEM; | |
4ac53087 | 190 | goto disable_clk; |
3429e91a SAS |
191 | } |
192 | ||
20f6fdd0 PA |
193 | if ((node && of_property_read_bool(node, "usb3-lpm-capable")) || |
194 | (pdata && pdata->usb3_lpm_capable)) | |
195 | xhci->quirks |= XHCI_LPM_SUPPORT; | |
3429e91a | 196 | |
14aec589 ON |
197 | if (HCC_MAX_PSA(xhci->hcc_params) >= 4) |
198 | xhci->shared_hcd->can_do_streams = 1; | |
199 | ||
7b8ef22e MR |
200 | hcd->usb_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0); |
201 | if (IS_ERR(hcd->usb_phy)) { | |
202 | ret = PTR_ERR(hcd->usb_phy); | |
203 | if (ret == -EPROBE_DEFER) | |
204 | goto put_usb3_hcd; | |
205 | hcd->usb_phy = NULL; | |
206 | } else { | |
207 | ret = usb_phy_init(hcd->usb_phy); | |
208 | if (ret) | |
209 | goto put_usb3_hcd; | |
210 | } | |
211 | ||
4ac53087 | 212 | ret = usb_add_hcd(hcd, irq, IRQF_SHARED); |
3429e91a | 213 | if (ret) |
7b8ef22e | 214 | goto disable_usb_phy; |
3429e91a | 215 | |
4ac53087 RQ |
216 | ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED); |
217 | if (ret) | |
218 | goto dealloc_usb2_hcd; | |
219 | ||
3429e91a SAS |
220 | return 0; |
221 | ||
4ac53087 RQ |
222 | |
223 | dealloc_usb2_hcd: | |
224 | usb_remove_hcd(hcd); | |
225 | ||
7b8ef22e MR |
226 | disable_usb_phy: |
227 | usb_phy_shutdown(hcd->usb_phy); | |
228 | ||
3429e91a SAS |
229 | put_usb3_hcd: |
230 | usb_put_hcd(xhci->shared_hcd); | |
231 | ||
4718c177 GC |
232 | disable_clk: |
233 | if (!IS_ERR(clk)) | |
234 | clk_disable_unprepare(clk); | |
235 | ||
3429e91a SAS |
236 | put_hcd: |
237 | usb_put_hcd(hcd); | |
238 | ||
239 | return ret; | |
240 | } | |
241 | ||
242 | static int xhci_plat_remove(struct platform_device *dev) | |
243 | { | |
244 | struct usb_hcd *hcd = platform_get_drvdata(dev); | |
245 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
4718c177 | 246 | struct clk *clk = xhci->clk; |
3429e91a SAS |
247 | |
248 | usb_remove_hcd(xhci->shared_hcd); | |
7b8ef22e | 249 | usb_phy_shutdown(hcd->usb_phy); |
3429e91a SAS |
250 | |
251 | usb_remove_hcd(hcd); | |
4ac53087 RQ |
252 | usb_put_hcd(xhci->shared_hcd); |
253 | ||
4718c177 GC |
254 | if (!IS_ERR(clk)) |
255 | clk_disable_unprepare(clk); | |
3429e91a | 256 | usb_put_hcd(hcd); |
3429e91a SAS |
257 | |
258 | return 0; | |
259 | } | |
260 | ||
274f6afa | 261 | #ifdef CONFIG_PM_SLEEP |
57d04eb1 VS |
262 | static int xhci_plat_suspend(struct device *dev) |
263 | { | |
264 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
265 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
266 | ||
a1377e53 LB |
267 | /* |
268 | * xhci_suspend() needs `do_wakeup` to know whether host is allowed | |
269 | * to do wakeup during suspend. Since xhci_plat_suspend is currently | |
270 | * only designed for system suspend, device_may_wakeup() is enough | |
271 | * to dertermine whether host is allowed to do wakeup. Need to | |
272 | * reconsider this when xhci_plat_suspend enlarges its scope, e.g., | |
273 | * also applies to runtime suspend. | |
274 | */ | |
275 | return xhci_suspend(xhci, device_may_wakeup(dev)); | |
57d04eb1 VS |
276 | } |
277 | ||
278 | static int xhci_plat_resume(struct device *dev) | |
279 | { | |
280 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
281 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
282 | ||
283 | return xhci_resume(xhci, 0); | |
284 | } | |
285 | ||
286 | static const struct dev_pm_ops xhci_plat_pm_ops = { | |
287 | SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume) | |
288 | }; | |
289 | #define DEV_PM_OPS (&xhci_plat_pm_ops) | |
290 | #else | |
291 | #define DEV_PM_OPS NULL | |
292 | #endif /* CONFIG_PM */ | |
293 | ||
579085b5 DD |
294 | static const struct acpi_device_id usb_xhci_acpi_match[] = { |
295 | /* XHCI-compliant USB Controller */ | |
296 | { "PNP0D10", }, | |
297 | { } | |
298 | }; | |
299 | MODULE_DEVICE_TABLE(acpi, usb_xhci_acpi_match); | |
300 | ||
3429e91a SAS |
301 | static struct platform_driver usb_xhci_driver = { |
302 | .probe = xhci_plat_probe, | |
303 | .remove = xhci_plat_remove, | |
304 | .driver = { | |
305 | .name = "xhci-hcd", | |
57d04eb1 | 306 | .pm = DEV_PM_OPS, |
1fe6c452 | 307 | .of_match_table = of_match_ptr(usb_xhci_of_match), |
579085b5 | 308 | .acpi_match_table = ACPI_PTR(usb_xhci_acpi_match), |
3429e91a SAS |
309 | }, |
310 | }; | |
311 | MODULE_ALIAS("platform:xhci-hcd"); | |
312 | ||
29e409f0 | 313 | static int __init xhci_plat_init(void) |
3429e91a | 314 | { |
cd33a321 | 315 | xhci_init_driver(&xhci_plat_hc_driver, &xhci_plat_overrides); |
3429e91a SAS |
316 | return platform_driver_register(&usb_xhci_driver); |
317 | } | |
29e409f0 | 318 | module_init(xhci_plat_init); |
3429e91a | 319 | |
29e409f0 | 320 | static void __exit xhci_plat_exit(void) |
3429e91a SAS |
321 | { |
322 | platform_driver_unregister(&usb_xhci_driver); | |
323 | } | |
29e409f0 AB |
324 | module_exit(xhci_plat_exit); |
325 | ||
326 | MODULE_DESCRIPTION("xHCI Platform Host Controller Driver"); | |
327 | MODULE_LICENSE("GPL"); |