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" | |
97374792 | 25 | #include "xhci-mvebu.h" |
4ac8918f | 26 | #include "xhci-rcar.h" |
3429e91a | 27 | |
1885d9a3 AB |
28 | static struct hc_driver __read_mostly xhci_plat_hc_driver; |
29 | ||
cd33a321 RQ |
30 | static int xhci_plat_setup(struct usb_hcd *hcd); |
31 | static int xhci_plat_start(struct usb_hcd *hcd); | |
32 | ||
33 | static const struct xhci_driver_overrides xhci_plat_overrides __initconst = { | |
34 | .extra_priv_size = sizeof(struct xhci_hcd), | |
35 | .reset = xhci_plat_setup, | |
36 | .start = xhci_plat_start, | |
37 | }; | |
38 | ||
3429e91a SAS |
39 | static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci) |
40 | { | |
41 | /* | |
42 | * As of now platform drivers don't provide MSI support so we ensure | |
43 | * here that the generic code does not try to make a pci_dev from our | |
44 | * dev struct in order to setup MSI | |
45 | */ | |
52fb6125 | 46 | xhci->quirks |= XHCI_PLAT; |
3429e91a SAS |
47 | } |
48 | ||
49 | /* called during probe() after chip reset completes */ | |
50 | static int xhci_plat_setup(struct usb_hcd *hcd) | |
51 | { | |
4ac8918f YS |
52 | struct device_node *of_node = hcd->self.controller->of_node; |
53 | int ret; | |
54 | ||
55 | if (of_device_is_compatible(of_node, "renesas,xhci-r8a7790") || | |
56 | of_device_is_compatible(of_node, "renesas,xhci-r8a7791")) { | |
57 | ret = xhci_rcar_init_quirk(hcd); | |
58 | if (ret) | |
59 | return ret; | |
60 | } | |
61 | ||
3429e91a SAS |
62 | return xhci_gen_setup(hcd, xhci_plat_quirks); |
63 | } | |
64 | ||
94adcdce YS |
65 | static int xhci_plat_start(struct usb_hcd *hcd) |
66 | { | |
4ac8918f YS |
67 | struct device_node *of_node = hcd->self.controller->of_node; |
68 | ||
69 | if (of_device_is_compatible(of_node, "renesas,xhci-r8a7790") || | |
70 | of_device_is_compatible(of_node, "renesas,xhci-r8a7791")) | |
71 | xhci_rcar_start(hcd); | |
72 | ||
94adcdce YS |
73 | return xhci_run(hcd); |
74 | } | |
75 | ||
3429e91a SAS |
76 | static int xhci_plat_probe(struct platform_device *pdev) |
77 | { | |
20f6fdd0 PA |
78 | struct device_node *node = pdev->dev.of_node; |
79 | struct usb_xhci_pdata *pdata = dev_get_platdata(&pdev->dev); | |
3429e91a SAS |
80 | const struct hc_driver *driver; |
81 | struct xhci_hcd *xhci; | |
82 | struct resource *res; | |
83 | struct usb_hcd *hcd; | |
4718c177 | 84 | struct clk *clk; |
3429e91a SAS |
85 | int ret; |
86 | int irq; | |
87 | ||
88 | if (usb_disabled()) | |
89 | return -ENODEV; | |
90 | ||
1885d9a3 | 91 | driver = &xhci_plat_hc_driver; |
3429e91a SAS |
92 | |
93 | irq = platform_get_irq(pdev, 0); | |
94 | if (irq < 0) | |
95 | return -ENODEV; | |
96 | ||
0ebbe398 DD |
97 | /* Try to set 64-bit DMA first */ |
98 | if (WARN_ON(!pdev->dev.dma_mask)) | |
99 | /* Platform did not initialize dma_mask */ | |
100 | ret = dma_coerce_mask_and_coherent(&pdev->dev, | |
101 | DMA_BIT_MASK(64)); | |
c10cf118 | 102 | else |
0ebbe398 DD |
103 | ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); |
104 | ||
105 | /* If seting 64-bit DMA mask fails, fall back to 32-bit DMA mask */ | |
106 | if (ret) { | |
107 | ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); | |
108 | if (ret) | |
109 | return ret; | |
110 | } | |
c10cf118 | 111 | |
3429e91a SAS |
112 | hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev)); |
113 | if (!hcd) | |
114 | return -ENOMEM; | |
115 | ||
e7020f19 | 116 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
fd666348 HS |
117 | hcd->regs = devm_ioremap_resource(&pdev->dev, res); |
118 | if (IS_ERR(hcd->regs)) { | |
119 | ret = PTR_ERR(hcd->regs); | |
3429e91a SAS |
120 | goto put_hcd; |
121 | } | |
122 | ||
e7020f19 VB |
123 | hcd->rsrc_start = res->start; |
124 | hcd->rsrc_len = resource_size(res); | |
125 | ||
4718c177 GC |
126 | /* |
127 | * Not all platforms have a clk so it is not an error if the | |
128 | * clock does not exists. | |
129 | */ | |
130 | clk = devm_clk_get(&pdev->dev, NULL); | |
131 | if (!IS_ERR(clk)) { | |
132 | ret = clk_prepare_enable(clk); | |
133 | if (ret) | |
fd666348 | 134 | goto put_hcd; |
4718c177 GC |
135 | } |
136 | ||
1e7e4fb6 MR |
137 | if (of_device_is_compatible(pdev->dev.of_node, |
138 | "marvell,armada-375-xhci") || | |
139 | of_device_is_compatible(pdev->dev.of_node, | |
140 | "marvell,armada-380-xhci")) { | |
141 | ret = xhci_mvebu_mbus_init_quirk(pdev); | |
142 | if (ret) | |
143 | goto disable_clk; | |
144 | } | |
145 | ||
3c9740a1 | 146 | device_wakeup_enable(hcd->self.controller); |
3429e91a | 147 | |
3429e91a | 148 | xhci = hcd_to_xhci(hcd); |
4718c177 | 149 | xhci->clk = clk; |
9fa733f2 | 150 | xhci->main_hcd = hcd; |
3429e91a SAS |
151 | xhci->shared_hcd = usb_create_shared_hcd(driver, &pdev->dev, |
152 | dev_name(&pdev->dev), hcd); | |
153 | if (!xhci->shared_hcd) { | |
154 | ret = -ENOMEM; | |
4ac53087 | 155 | goto disable_clk; |
3429e91a SAS |
156 | } |
157 | ||
20f6fdd0 PA |
158 | if ((node && of_property_read_bool(node, "usb3-lpm-capable")) || |
159 | (pdata && pdata->usb3_lpm_capable)) | |
160 | xhci->quirks |= XHCI_LPM_SUPPORT; | |
3429e91a | 161 | |
14aec589 ON |
162 | if (HCC_MAX_PSA(xhci->hcc_params) >= 4) |
163 | xhci->shared_hcd->can_do_streams = 1; | |
164 | ||
7b8ef22e MR |
165 | hcd->usb_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0); |
166 | if (IS_ERR(hcd->usb_phy)) { | |
167 | ret = PTR_ERR(hcd->usb_phy); | |
168 | if (ret == -EPROBE_DEFER) | |
169 | goto put_usb3_hcd; | |
170 | hcd->usb_phy = NULL; | |
171 | } else { | |
172 | ret = usb_phy_init(hcd->usb_phy); | |
173 | if (ret) | |
174 | goto put_usb3_hcd; | |
175 | } | |
176 | ||
4ac53087 | 177 | ret = usb_add_hcd(hcd, irq, IRQF_SHARED); |
3429e91a | 178 | if (ret) |
7b8ef22e | 179 | goto disable_usb_phy; |
3429e91a | 180 | |
4ac53087 RQ |
181 | ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED); |
182 | if (ret) | |
183 | goto dealloc_usb2_hcd; | |
184 | ||
3429e91a SAS |
185 | return 0; |
186 | ||
4ac53087 RQ |
187 | |
188 | dealloc_usb2_hcd: | |
189 | usb_remove_hcd(hcd); | |
190 | ||
7b8ef22e MR |
191 | disable_usb_phy: |
192 | usb_phy_shutdown(hcd->usb_phy); | |
193 | ||
3429e91a SAS |
194 | put_usb3_hcd: |
195 | usb_put_hcd(xhci->shared_hcd); | |
196 | ||
4718c177 GC |
197 | disable_clk: |
198 | if (!IS_ERR(clk)) | |
199 | clk_disable_unprepare(clk); | |
200 | ||
3429e91a SAS |
201 | put_hcd: |
202 | usb_put_hcd(hcd); | |
203 | ||
204 | return ret; | |
205 | } | |
206 | ||
207 | static int xhci_plat_remove(struct platform_device *dev) | |
208 | { | |
209 | struct usb_hcd *hcd = platform_get_drvdata(dev); | |
210 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
4718c177 | 211 | struct clk *clk = xhci->clk; |
3429e91a SAS |
212 | |
213 | usb_remove_hcd(xhci->shared_hcd); | |
7b8ef22e | 214 | usb_phy_shutdown(hcd->usb_phy); |
3429e91a SAS |
215 | |
216 | usb_remove_hcd(hcd); | |
4ac53087 RQ |
217 | usb_put_hcd(xhci->shared_hcd); |
218 | ||
4718c177 GC |
219 | if (!IS_ERR(clk)) |
220 | clk_disable_unprepare(clk); | |
3429e91a | 221 | usb_put_hcd(hcd); |
3429e91a SAS |
222 | |
223 | return 0; | |
224 | } | |
225 | ||
274f6afa | 226 | #ifdef CONFIG_PM_SLEEP |
57d04eb1 VS |
227 | static int xhci_plat_suspend(struct device *dev) |
228 | { | |
229 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
230 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
231 | ||
a1377e53 LB |
232 | /* |
233 | * xhci_suspend() needs `do_wakeup` to know whether host is allowed | |
234 | * to do wakeup during suspend. Since xhci_plat_suspend is currently | |
235 | * only designed for system suspend, device_may_wakeup() is enough | |
236 | * to dertermine whether host is allowed to do wakeup. Need to | |
237 | * reconsider this when xhci_plat_suspend enlarges its scope, e.g., | |
238 | * also applies to runtime suspend. | |
239 | */ | |
240 | return xhci_suspend(xhci, device_may_wakeup(dev)); | |
57d04eb1 VS |
241 | } |
242 | ||
243 | static int xhci_plat_resume(struct device *dev) | |
244 | { | |
245 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
246 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
247 | ||
248 | return xhci_resume(xhci, 0); | |
249 | } | |
250 | ||
251 | static const struct dev_pm_ops xhci_plat_pm_ops = { | |
252 | SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume) | |
253 | }; | |
254 | #define DEV_PM_OPS (&xhci_plat_pm_ops) | |
255 | #else | |
256 | #define DEV_PM_OPS NULL | |
257 | #endif /* CONFIG_PM */ | |
258 | ||
1fe6c452 AC |
259 | #ifdef CONFIG_OF |
260 | static const struct of_device_id usb_xhci_of_match[] = { | |
0f94388b | 261 | { .compatible = "generic-xhci" }, |
1fe6c452 | 262 | { .compatible = "xhci-platform" }, |
97374792 GC |
263 | { .compatible = "marvell,armada-375-xhci"}, |
264 | { .compatible = "marvell,armada-380-xhci"}, | |
4ac8918f YS |
265 | { .compatible = "renesas,xhci-r8a7790"}, |
266 | { .compatible = "renesas,xhci-r8a7791"}, | |
1fe6c452 AC |
267 | { }, |
268 | }; | |
269 | MODULE_DEVICE_TABLE(of, usb_xhci_of_match); | |
270 | #endif | |
271 | ||
579085b5 DD |
272 | static const struct acpi_device_id usb_xhci_acpi_match[] = { |
273 | /* XHCI-compliant USB Controller */ | |
274 | { "PNP0D10", }, | |
275 | { } | |
276 | }; | |
277 | MODULE_DEVICE_TABLE(acpi, usb_xhci_acpi_match); | |
278 | ||
3429e91a SAS |
279 | static struct platform_driver usb_xhci_driver = { |
280 | .probe = xhci_plat_probe, | |
281 | .remove = xhci_plat_remove, | |
282 | .driver = { | |
283 | .name = "xhci-hcd", | |
57d04eb1 | 284 | .pm = DEV_PM_OPS, |
1fe6c452 | 285 | .of_match_table = of_match_ptr(usb_xhci_of_match), |
579085b5 | 286 | .acpi_match_table = ACPI_PTR(usb_xhci_acpi_match), |
3429e91a SAS |
287 | }, |
288 | }; | |
289 | MODULE_ALIAS("platform:xhci-hcd"); | |
290 | ||
29e409f0 | 291 | static int __init xhci_plat_init(void) |
3429e91a | 292 | { |
cd33a321 | 293 | xhci_init_driver(&xhci_plat_hc_driver, &xhci_plat_overrides); |
3429e91a SAS |
294 | return platform_driver_register(&usb_xhci_driver); |
295 | } | |
29e409f0 | 296 | module_init(xhci_plat_init); |
3429e91a | 297 | |
29e409f0 | 298 | static void __exit xhci_plat_exit(void) |
3429e91a SAS |
299 | { |
300 | platform_driver_unregister(&usb_xhci_driver); | |
301 | } | |
29e409f0 AB |
302 | module_exit(xhci_plat_exit); |
303 | ||
304 | MODULE_DESCRIPTION("xHCI Platform Host Controller Driver"); | |
305 | MODULE_LICENSE("GPL"); |