2 * xhci-plat.c - xHCI host controller driver platform Bus Glue.
4 * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
5 * Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
7 * A lot of code borrowed from the Linux xHCI driver.
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.
14 #include <linux/clk.h>
15 #include <linux/dma-mapping.h>
16 #include <linux/module.h>
18 #include <linux/platform_device.h>
19 #include <linux/usb/phy.h>
20 #include <linux/slab.h>
21 #include <linux/usb/xhci_pdriver.h>
24 #include "xhci-mvebu.h"
25 #include "xhci-rcar.h"
27 static struct hc_driver __read_mostly xhci_plat_hc_driver
;
29 static void xhci_plat_quirks(struct device
*dev
, struct xhci_hcd
*xhci
)
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
36 xhci
->quirks
|= XHCI_PLAT
;
39 /* called during probe() after chip reset completes */
40 static int xhci_plat_setup(struct usb_hcd
*hcd
)
42 struct device_node
*of_node
= hcd
->self
.controller
->of_node
;
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
);
52 return xhci_gen_setup(hcd
, xhci_plat_quirks
);
55 static int xhci_plat_start(struct usb_hcd
*hcd
)
57 struct device_node
*of_node
= hcd
->self
.controller
->of_node
;
59 if (of_device_is_compatible(of_node
, "renesas,xhci-r8a7790") ||
60 of_device_is_compatible(of_node
, "renesas,xhci-r8a7791"))
66 static int xhci_plat_probe(struct platform_device
*pdev
)
68 struct device_node
*node
= pdev
->dev
.of_node
;
69 struct usb_xhci_pdata
*pdata
= dev_get_platdata(&pdev
->dev
);
70 const struct hc_driver
*driver
;
71 struct xhci_hcd
*xhci
;
81 driver
= &xhci_plat_hc_driver
;
83 irq
= platform_get_irq(pdev
, 0);
87 /* Initialize dma_mask and coherent_dma_mask to 32-bits */
88 ret
= dma_set_coherent_mask(&pdev
->dev
, DMA_BIT_MASK(32));
91 if (!pdev
->dev
.dma_mask
)
92 pdev
->dev
.dma_mask
= &pdev
->dev
.coherent_dma_mask
;
94 dma_set_mask(&pdev
->dev
, DMA_BIT_MASK(32));
96 hcd
= usb_create_hcd(driver
, &pdev
->dev
, dev_name(&pdev
->dev
));
100 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
101 hcd
->regs
= devm_ioremap_resource(&pdev
->dev
, res
);
102 if (IS_ERR(hcd
->regs
)) {
103 ret
= PTR_ERR(hcd
->regs
);
107 hcd
->rsrc_start
= res
->start
;
108 hcd
->rsrc_len
= resource_size(res
);
111 * Not all platforms have a clk so it is not an error if the
112 * clock does not exists.
114 clk
= devm_clk_get(&pdev
->dev
, NULL
);
116 ret
= clk_prepare_enable(clk
);
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
);
130 ret
= usb_add_hcd(hcd
, irq
, IRQF_SHARED
);
134 device_wakeup_enable(hcd
->self
.controller
);
136 /* USB 2.0 roothub is stored in the platform_device now. */
137 hcd
= platform_get_drvdata(pdev
);
138 xhci
= hcd_to_xhci(hcd
);
140 xhci
->shared_hcd
= usb_create_shared_hcd(driver
, &pdev
->dev
,
141 dev_name(&pdev
->dev
), hcd
);
142 if (!xhci
->shared_hcd
) {
144 goto dealloc_usb2_hcd
;
147 if ((node
&& of_property_read_bool(node
, "usb3-lpm-capable")) ||
148 (pdata
&& pdata
->usb3_lpm_capable
))
149 xhci
->quirks
|= XHCI_LPM_SUPPORT
;
151 * Set the xHCI pointer before xhci_plat_setup() (aka hcd_driver.reset)
152 * is called by usb_add_hcd().
154 *((struct xhci_hcd
**) xhci
->shared_hcd
->hcd_priv
) = xhci
;
156 if (HCC_MAX_PSA(xhci
->hcc_params
) >= 4)
157 xhci
->shared_hcd
->can_do_streams
= 1;
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
)
166 ret
= usb_phy_init(hcd
->usb_phy
);
171 ret
= usb_add_hcd(xhci
->shared_hcd
, irq
, IRQF_SHARED
);
173 goto disable_usb_phy
;
178 usb_phy_shutdown(hcd
->usb_phy
);
181 usb_put_hcd(xhci
->shared_hcd
);
188 clk_disable_unprepare(clk
);
196 static int xhci_plat_remove(struct platform_device
*dev
)
198 struct usb_hcd
*hcd
= platform_get_drvdata(dev
);
199 struct xhci_hcd
*xhci
= hcd_to_xhci(hcd
);
200 struct clk
*clk
= xhci
->clk
;
202 usb_remove_hcd(xhci
->shared_hcd
);
203 usb_phy_shutdown(hcd
->usb_phy
);
204 usb_put_hcd(xhci
->shared_hcd
);
208 clk_disable_unprepare(clk
);
215 #ifdef CONFIG_PM_SLEEP
216 static int xhci_plat_suspend(struct device
*dev
)
218 struct usb_hcd
*hcd
= dev_get_drvdata(dev
);
219 struct xhci_hcd
*xhci
= hcd_to_xhci(hcd
);
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.
229 return xhci_suspend(xhci
, device_may_wakeup(dev
));
232 static int xhci_plat_resume(struct device
*dev
)
234 struct usb_hcd
*hcd
= dev_get_drvdata(dev
);
235 struct xhci_hcd
*xhci
= hcd_to_xhci(hcd
);
237 return xhci_resume(xhci
, 0);
240 static const struct dev_pm_ops xhci_plat_pm_ops
= {
241 SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend
, xhci_plat_resume
)
243 #define DEV_PM_OPS (&xhci_plat_pm_ops)
245 #define DEV_PM_OPS NULL
246 #endif /* CONFIG_PM */
249 static const struct of_device_id usb_xhci_of_match
[] = {
250 { .compatible
= "generic-xhci" },
251 { .compatible
= "xhci-platform" },
252 { .compatible
= "marvell,armada-375-xhci"},
253 { .compatible
= "marvell,armada-380-xhci"},
254 { .compatible
= "renesas,xhci-r8a7790"},
255 { .compatible
= "renesas,xhci-r8a7791"},
258 MODULE_DEVICE_TABLE(of
, usb_xhci_of_match
);
261 static struct platform_driver usb_xhci_driver
= {
262 .probe
= xhci_plat_probe
,
263 .remove
= xhci_plat_remove
,
267 .of_match_table
= of_match_ptr(usb_xhci_of_match
),
270 MODULE_ALIAS("platform:xhci-hcd");
272 static int __init
xhci_plat_init(void)
274 xhci_init_driver(&xhci_plat_hc_driver
, xhci_plat_setup
);
275 xhci_plat_hc_driver
.start
= xhci_plat_start
;
276 return platform_driver_register(&usb_xhci_driver
);
278 module_init(xhci_plat_init
);
280 static void __exit
xhci_plat_exit(void)
282 platform_driver_unregister(&usb_xhci_driver
);
284 module_exit(xhci_plat_exit
);
286 MODULE_DESCRIPTION("xHCI Platform Host Controller Driver");
287 MODULE_LICENSE("GPL");