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> |
3429e91a SAS |
22 | |
23 | #include "xhci.h" | |
97374792 | 24 | #include "xhci-mvebu.h" |
4ac8918f | 25 | #include "xhci-rcar.h" |
3429e91a | 26 | |
1885d9a3 AB |
27 | static struct hc_driver __read_mostly xhci_plat_hc_driver; |
28 | ||
3429e91a SAS |
29 | static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci) |
30 | { | |
31 | /* | |
32 | * As of now platform drivers don't provide MSI support so we ensure | |
33 | * here that the generic code does not try to make a pci_dev from our | |
34 | * dev struct in order to setup MSI | |
35 | */ | |
52fb6125 | 36 | xhci->quirks |= XHCI_PLAT; |
3429e91a SAS |
37 | } |
38 | ||
39 | /* called during probe() after chip reset completes */ | |
40 | static int xhci_plat_setup(struct usb_hcd *hcd) | |
41 | { | |
4ac8918f YS |
42 | struct device_node *of_node = hcd->self.controller->of_node; |
43 | int ret; | |
44 | ||
45 | if (of_device_is_compatible(of_node, "renesas,xhci-r8a7790") || | |
46 | of_device_is_compatible(of_node, "renesas,xhci-r8a7791")) { | |
47 | ret = xhci_rcar_init_quirk(hcd); | |
48 | if (ret) | |
49 | return ret; | |
50 | } | |
51 | ||
3429e91a SAS |
52 | return xhci_gen_setup(hcd, xhci_plat_quirks); |
53 | } | |
54 | ||
94adcdce YS |
55 | static int xhci_plat_start(struct usb_hcd *hcd) |
56 | { | |
4ac8918f YS |
57 | struct device_node *of_node = hcd->self.controller->of_node; |
58 | ||
59 | if (of_device_is_compatible(of_node, "renesas,xhci-r8a7790") || | |
60 | of_device_is_compatible(of_node, "renesas,xhci-r8a7791")) | |
61 | xhci_rcar_start(hcd); | |
62 | ||
94adcdce YS |
63 | return xhci_run(hcd); |
64 | } | |
65 | ||
3429e91a SAS |
66 | static int xhci_plat_probe(struct platform_device *pdev) |
67 | { | |
20f6fdd0 PA |
68 | struct device_node *node = pdev->dev.of_node; |
69 | struct usb_xhci_pdata *pdata = dev_get_platdata(&pdev->dev); | |
3429e91a SAS |
70 | const struct hc_driver *driver; |
71 | struct xhci_hcd *xhci; | |
72 | struct resource *res; | |
73 | struct usb_hcd *hcd; | |
4718c177 | 74 | struct clk *clk; |
3429e91a SAS |
75 | int ret; |
76 | int irq; | |
77 | ||
78 | if (usb_disabled()) | |
79 | return -ENODEV; | |
80 | ||
1885d9a3 | 81 | driver = &xhci_plat_hc_driver; |
3429e91a SAS |
82 | |
83 | irq = platform_get_irq(pdev, 0); | |
84 | if (irq < 0) | |
85 | return -ENODEV; | |
86 | ||
c10cf118 XR |
87 | /* Initialize dma_mask and coherent_dma_mask to 32-bits */ |
88 | ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); | |
89 | if (ret) | |
90 | return ret; | |
91 | if (!pdev->dev.dma_mask) | |
92 | pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask; | |
93 | else | |
94 | dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); | |
95 | ||
3429e91a SAS |
96 | hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev)); |
97 | if (!hcd) | |
98 | return -ENOMEM; | |
99 | ||
e7020f19 | 100 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
fd666348 HS |
101 | hcd->regs = devm_ioremap_resource(&pdev->dev, res); |
102 | if (IS_ERR(hcd->regs)) { | |
103 | ret = PTR_ERR(hcd->regs); | |
3429e91a SAS |
104 | goto put_hcd; |
105 | } | |
106 | ||
e7020f19 VB |
107 | hcd->rsrc_start = res->start; |
108 | hcd->rsrc_len = resource_size(res); | |
109 | ||
4718c177 GC |
110 | /* |
111 | * Not all platforms have a clk so it is not an error if the | |
112 | * clock does not exists. | |
113 | */ | |
114 | clk = devm_clk_get(&pdev->dev, NULL); | |
115 | if (!IS_ERR(clk)) { | |
116 | ret = clk_prepare_enable(clk); | |
117 | if (ret) | |
fd666348 | 118 | goto put_hcd; |
4718c177 GC |
119 | } |
120 | ||
1e7e4fb6 MR |
121 | if (of_device_is_compatible(pdev->dev.of_node, |
122 | "marvell,armada-375-xhci") || | |
123 | of_device_is_compatible(pdev->dev.of_node, | |
124 | "marvell,armada-380-xhci")) { | |
125 | ret = xhci_mvebu_mbus_init_quirk(pdev); | |
126 | if (ret) | |
127 | goto disable_clk; | |
128 | } | |
129 | ||
3429e91a SAS |
130 | ret = usb_add_hcd(hcd, irq, IRQF_SHARED); |
131 | if (ret) | |
4718c177 GC |
132 | goto disable_clk; |
133 | ||
3c9740a1 | 134 | device_wakeup_enable(hcd->self.controller); |
3429e91a SAS |
135 | |
136 | /* USB 2.0 roothub is stored in the platform_device now. */ | |
477527ba | 137 | hcd = platform_get_drvdata(pdev); |
3429e91a | 138 | xhci = hcd_to_xhci(hcd); |
4718c177 | 139 | xhci->clk = clk; |
3429e91a SAS |
140 | xhci->shared_hcd = usb_create_shared_hcd(driver, &pdev->dev, |
141 | dev_name(&pdev->dev), hcd); | |
142 | if (!xhci->shared_hcd) { | |
143 | ret = -ENOMEM; | |
144 | goto dealloc_usb2_hcd; | |
145 | } | |
146 | ||
20f6fdd0 PA |
147 | if ((node && of_property_read_bool(node, "usb3-lpm-capable")) || |
148 | (pdata && pdata->usb3_lpm_capable)) | |
149 | xhci->quirks |= XHCI_LPM_SUPPORT; | |
3429e91a SAS |
150 | /* |
151 | * Set the xHCI pointer before xhci_plat_setup() (aka hcd_driver.reset) | |
152 | * is called by usb_add_hcd(). | |
153 | */ | |
154 | *((struct xhci_hcd **) xhci->shared_hcd->hcd_priv) = xhci; | |
155 | ||
14aec589 ON |
156 | if (HCC_MAX_PSA(xhci->hcc_params) >= 4) |
157 | xhci->shared_hcd->can_do_streams = 1; | |
158 | ||
7b8ef22e MR |
159 | hcd->usb_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0); |
160 | if (IS_ERR(hcd->usb_phy)) { | |
161 | ret = PTR_ERR(hcd->usb_phy); | |
162 | if (ret == -EPROBE_DEFER) | |
163 | goto put_usb3_hcd; | |
164 | hcd->usb_phy = NULL; | |
165 | } else { | |
166 | ret = usb_phy_init(hcd->usb_phy); | |
167 | if (ret) | |
168 | goto put_usb3_hcd; | |
169 | } | |
170 | ||
3429e91a SAS |
171 | ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED); |
172 | if (ret) | |
7b8ef22e | 173 | goto disable_usb_phy; |
3429e91a SAS |
174 | |
175 | return 0; | |
176 | ||
7b8ef22e MR |
177 | disable_usb_phy: |
178 | usb_phy_shutdown(hcd->usb_phy); | |
179 | ||
3429e91a SAS |
180 | put_usb3_hcd: |
181 | usb_put_hcd(xhci->shared_hcd); | |
182 | ||
183 | dealloc_usb2_hcd: | |
184 | usb_remove_hcd(hcd); | |
185 | ||
4718c177 GC |
186 | disable_clk: |
187 | if (!IS_ERR(clk)) | |
188 | clk_disable_unprepare(clk); | |
189 | ||
3429e91a SAS |
190 | put_hcd: |
191 | usb_put_hcd(hcd); | |
192 | ||
193 | return ret; | |
194 | } | |
195 | ||
196 | static int xhci_plat_remove(struct platform_device *dev) | |
197 | { | |
198 | struct usb_hcd *hcd = platform_get_drvdata(dev); | |
199 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
4718c177 | 200 | struct clk *clk = xhci->clk; |
3429e91a SAS |
201 | |
202 | usb_remove_hcd(xhci->shared_hcd); | |
7b8ef22e | 203 | usb_phy_shutdown(hcd->usb_phy); |
3429e91a SAS |
204 | usb_put_hcd(xhci->shared_hcd); |
205 | ||
206 | usb_remove_hcd(hcd); | |
4718c177 GC |
207 | if (!IS_ERR(clk)) |
208 | clk_disable_unprepare(clk); | |
3429e91a SAS |
209 | usb_put_hcd(hcd); |
210 | kfree(xhci); | |
211 | ||
212 | return 0; | |
213 | } | |
214 | ||
274f6afa | 215 | #ifdef CONFIG_PM_SLEEP |
57d04eb1 VS |
216 | static int xhci_plat_suspend(struct device *dev) |
217 | { | |
218 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
219 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
220 | ||
a1377e53 LB |
221 | /* |
222 | * xhci_suspend() needs `do_wakeup` to know whether host is allowed | |
223 | * to do wakeup during suspend. Since xhci_plat_suspend is currently | |
224 | * only designed for system suspend, device_may_wakeup() is enough | |
225 | * to dertermine whether host is allowed to do wakeup. Need to | |
226 | * reconsider this when xhci_plat_suspend enlarges its scope, e.g., | |
227 | * also applies to runtime suspend. | |
228 | */ | |
229 | return xhci_suspend(xhci, device_may_wakeup(dev)); | |
57d04eb1 VS |
230 | } |
231 | ||
232 | static int xhci_plat_resume(struct device *dev) | |
233 | { | |
234 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
235 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
236 | ||
237 | return xhci_resume(xhci, 0); | |
238 | } | |
239 | ||
240 | static const struct dev_pm_ops xhci_plat_pm_ops = { | |
241 | SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume) | |
242 | }; | |
243 | #define DEV_PM_OPS (&xhci_plat_pm_ops) | |
244 | #else | |
245 | #define DEV_PM_OPS NULL | |
246 | #endif /* CONFIG_PM */ | |
247 | ||
1fe6c452 AC |
248 | #ifdef CONFIG_OF |
249 | static const struct of_device_id usb_xhci_of_match[] = { | |
0f94388b | 250 | { .compatible = "generic-xhci" }, |
1fe6c452 | 251 | { .compatible = "xhci-platform" }, |
97374792 GC |
252 | { .compatible = "marvell,armada-375-xhci"}, |
253 | { .compatible = "marvell,armada-380-xhci"}, | |
4ac8918f YS |
254 | { .compatible = "renesas,xhci-r8a7790"}, |
255 | { .compatible = "renesas,xhci-r8a7791"}, | |
1fe6c452 AC |
256 | { }, |
257 | }; | |
258 | MODULE_DEVICE_TABLE(of, usb_xhci_of_match); | |
259 | #endif | |
260 | ||
3429e91a SAS |
261 | static struct platform_driver usb_xhci_driver = { |
262 | .probe = xhci_plat_probe, | |
263 | .remove = xhci_plat_remove, | |
264 | .driver = { | |
265 | .name = "xhci-hcd", | |
57d04eb1 | 266 | .pm = DEV_PM_OPS, |
1fe6c452 | 267 | .of_match_table = of_match_ptr(usb_xhci_of_match), |
3429e91a SAS |
268 | }, |
269 | }; | |
270 | MODULE_ALIAS("platform:xhci-hcd"); | |
271 | ||
29e409f0 | 272 | static int __init xhci_plat_init(void) |
3429e91a | 273 | { |
1885d9a3 AB |
274 | xhci_init_driver(&xhci_plat_hc_driver, xhci_plat_setup); |
275 | xhci_plat_hc_driver.start = xhci_plat_start; | |
3429e91a SAS |
276 | return platform_driver_register(&usb_xhci_driver); |
277 | } | |
29e409f0 | 278 | module_init(xhci_plat_init); |
3429e91a | 279 | |
29e409f0 | 280 | static void __exit xhci_plat_exit(void) |
3429e91a SAS |
281 | { |
282 | platform_driver_unregister(&usb_xhci_driver); | |
283 | } | |
29e409f0 AB |
284 | module_exit(xhci_plat_exit); |
285 | ||
286 | MODULE_DESCRIPTION("xHCI Platform Host Controller Driver"); | |
287 | MODULE_LICENSE("GPL"); |