source: src/linux/universal/linux-4.9/drivers/usb/host/xhci-plat.c @ 31859

Last change on this file since 31859 was 31859, checked in by brainslayer, 10 days ago

kernel update

File size: 8.9 KB
Line 
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
14#include <linux/clk.h>
15#include <linux/dma-mapping.h>
16#include <linux/module.h>
17#include <linux/of.h>
18#include <linux/platform_device.h>
19#include <linux/usb/phy.h>
20#include <linux/slab.h>
21#include <linux/acpi.h>
22
23#include "xhci.h"
24#include "xhci-plat.h"
25#include "xhci-mvebu.h"
26#include "xhci-rcar.h"
27
28static struct hc_driver __read_mostly xhci_plat_hc_driver;
29
30static int xhci_plat_setup(struct usb_hcd *hcd);
31static int xhci_plat_start(struct usb_hcd *hcd);
32
33static const struct xhci_driver_overrides xhci_plat_overrides __initconst = {
34        .extra_priv_size = sizeof(struct xhci_plat_priv),
35        .reset = xhci_plat_setup,
36        .start = xhci_plat_start,
37};
38
39static void xhci_priv_plat_start(struct usb_hcd *hcd)
40{
41        struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
42
43        if (priv->plat_start)
44                priv->plat_start(hcd);
45}
46
47static int xhci_priv_init_quirk(struct usb_hcd *hcd)
48{
49        struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
50
51        if (!priv->init_quirk)
52                return 0;
53
54        return priv->init_quirk(hcd);
55}
56
57static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
58{
59        /*
60         * As of now platform drivers don't provide MSI support so we ensure
61         * here that the generic code does not try to make a pci_dev from our
62         * dev struct in order to setup MSI
63         */
64        xhci->quirks |= XHCI_PLAT;
65}
66
67/* called during probe() after chip reset completes */
68static int xhci_plat_setup(struct usb_hcd *hcd)
69{
70        int ret;
71
72
73        ret = xhci_priv_init_quirk(hcd);
74        if (ret)
75                return ret;
76
77        return xhci_gen_setup(hcd, xhci_plat_quirks);
78}
79
80static int xhci_plat_start(struct usb_hcd *hcd)
81{
82        xhci_priv_plat_start(hcd);
83        return xhci_run(hcd);
84}
85
86#ifdef CONFIG_OF
87static const struct xhci_plat_priv xhci_plat_marvell_armada = {
88        .init_quirk = xhci_mvebu_mbus_init_quirk,
89};
90
91static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen2 = {
92        .firmware_name = XHCI_RCAR_FIRMWARE_NAME_V1,
93        .init_quirk = xhci_rcar_init_quirk,
94        .plat_start = xhci_rcar_start,
95};
96
97static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen3 = {
98        .firmware_name = XHCI_RCAR_FIRMWARE_NAME_V2,
99        .init_quirk = xhci_rcar_init_quirk,
100        .plat_start = xhci_rcar_start,
101};
102
103static const struct of_device_id usb_xhci_of_match[] = {
104        {
105                .compatible = "generic-xhci",
106        }, {
107                .compatible = "xhci-platform",
108        }, {
109                .compatible = "marvell,armada-375-xhci",
110                .data = &xhci_plat_marvell_armada,
111        }, {
112                .compatible = "marvell,armada-380-xhci",
113                .data = &xhci_plat_marvell_armada,
114        }, {
115                .compatible = "renesas,xhci-r8a7790",
116                .data = &xhci_plat_renesas_rcar_gen2,
117        }, {
118                .compatible = "renesas,xhci-r8a7791",
119                .data = &xhci_plat_renesas_rcar_gen2,
120        }, {
121                .compatible = "renesas,xhci-r8a7793",
122                .data = &xhci_plat_renesas_rcar_gen2,
123        }, {
124                .compatible = "renesas,xhci-r8a7795",
125                .data = &xhci_plat_renesas_rcar_gen3,
126        }, {
127                .compatible = "renesas,rcar-gen2-xhci",
128                .data = &xhci_plat_renesas_rcar_gen2,
129        }, {
130                .compatible = "renesas,rcar-gen3-xhci",
131                .data = &xhci_plat_renesas_rcar_gen3,
132        },
133        {},
134};
135MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
136#endif
137
138static int xhci_plat_probe(struct platform_device *pdev)
139{
140        const struct of_device_id *match;
141        const struct hc_driver  *driver;
142        struct xhci_hcd         *xhci;
143        struct resource         *res;
144        struct usb_hcd          *hcd;
145        struct clk              *clk;
146        int                     ret;
147        int                     irq;
148
149        if (usb_disabled())
150                return -ENODEV;
151
152        driver = &xhci_plat_hc_driver;
153
154        irq = platform_get_irq(pdev, 0);
155        if (irq < 0)
156                return -ENODEV;
157
158        /* Try to set 64-bit DMA first */
159        if (WARN_ON(!pdev->dev.dma_mask))
160                /* Platform did not initialize dma_mask */
161                ret = dma_coerce_mask_and_coherent(&pdev->dev,
162                                                   DMA_BIT_MASK(64));
163        else
164                ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
165
166        /* If seting 64-bit DMA mask fails, fall back to 32-bit DMA mask */
167        if (ret) {
168                ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
169                if (ret)
170                        return ret;
171        }
172
173        hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
174        if (!hcd)
175                return -ENOMEM;
176
177#if IS_ENABLED(CONFIG_DWMAC_IPQ806X)
178        if (pdata->usb2_susphy_quirk) {
179                hcd->susphy = pdata->susphy;
180        }
181#endif
182
183        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
184        hcd->regs = devm_ioremap_resource(&pdev->dev, res);
185        if (IS_ERR(hcd->regs)) {
186                ret = PTR_ERR(hcd->regs);
187                goto put_hcd;
188        }
189
190        hcd->rsrc_start = res->start;
191        hcd->rsrc_len = resource_size(res);
192
193        /*
194         * Not all platforms have a clk so it is not an error if the
195         * clock does not exists.
196         */
197        clk = devm_clk_get(&pdev->dev, NULL);
198        if (!IS_ERR(clk)) {
199                ret = clk_prepare_enable(clk);
200                if (ret)
201                        goto put_hcd;
202        } else if (PTR_ERR(clk) == -EPROBE_DEFER) {
203                ret = -EPROBE_DEFER;
204                goto put_hcd;
205        }
206
207        xhci = hcd_to_xhci(hcd);
208        match = of_match_node(usb_xhci_of_match, pdev->dev.of_node);
209        if (match) {
210                const struct xhci_plat_priv *priv_match = match->data;
211                struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
212
213                /* Just copy data for now */
214                if (priv_match)
215                        *priv = *priv_match;
216        }
217       
218#if IS_ENABLED(CONFIG_USB_XHCI_MVEBU)   
219        if (of_device_is_compatible(pdev->dev.of_node,
220                                     "marvell,armada-380-xhci")) {
221                ret = xhci_mvebu_vbus_init_quirk();
222                if (ret)
223                       goto disable_clk;
224        }
225#endif
226
227        device_wakeup_enable(hcd->self.controller);
228
229        xhci->clk = clk;
230        xhci->main_hcd = hcd;
231        xhci->shared_hcd = usb_create_shared_hcd(driver, &pdev->dev,
232                        dev_name(&pdev->dev), hcd);
233        if (!xhci->shared_hcd) {
234                ret = -ENOMEM;
235                goto disable_clk;
236        }
237
238        if (device_property_read_bool(&pdev->dev, "usb3-lpm-capable"))
239                xhci->quirks |= XHCI_LPM_SUPPORT;
240
241        if (device_property_read_bool(&pdev->dev, "quirk-broken-port-ped"))
242                xhci->quirks |= XHCI_BROKEN_PORT_PED;
243
244        hcd->usb_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
245        if (IS_ERR(hcd->usb_phy)) {
246                ret = PTR_ERR(hcd->usb_phy);
247                if (ret == -EPROBE_DEFER)
248                        goto put_usb3_hcd;
249                hcd->usb_phy = NULL;
250        } else {
251                ret = usb_phy_init(hcd->usb_phy);
252                if (ret)
253                        goto put_usb3_hcd;
254        }
255
256        ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
257        if (ret)
258                goto disable_usb_phy;
259
260        if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
261                xhci->shared_hcd->can_do_streams = 1;
262
263        ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
264        if (ret)
265                goto dealloc_usb2_hcd;
266
267        return 0;
268
269
270dealloc_usb2_hcd:
271        usb_remove_hcd(hcd);
272
273disable_usb_phy:
274        usb_phy_shutdown(hcd->usb_phy);
275
276put_usb3_hcd:
277        usb_put_hcd(xhci->shared_hcd);
278
279disable_clk:
280        if (!IS_ERR(clk))
281                clk_disable_unprepare(clk);
282
283put_hcd:
284        usb_put_hcd(hcd);
285
286        return ret;
287}
288
289static int xhci_plat_remove(struct platform_device *dev)
290{
291        struct usb_hcd  *hcd = platform_get_drvdata(dev);
292        struct xhci_hcd *xhci = hcd_to_xhci(hcd);
293        struct clk *clk = xhci->clk;
294
295        xhci->xhc_state |= XHCI_STATE_REMOVING;
296
297        usb_remove_hcd(xhci->shared_hcd);
298        usb_phy_shutdown(hcd->usb_phy);
299
300        usb_remove_hcd(hcd);
301        usb_put_hcd(xhci->shared_hcd);
302
303        if (!IS_ERR(clk))
304                clk_disable_unprepare(clk);
305        usb_put_hcd(hcd);
306
307        return 0;
308}
309
310#ifdef CONFIG_PM_SLEEP
311static int xhci_plat_suspend(struct device *dev)
312{
313        struct usb_hcd  *hcd = dev_get_drvdata(dev);
314        struct xhci_hcd *xhci = hcd_to_xhci(hcd);
315
316        /*
317         * xhci_suspend() needs `do_wakeup` to know whether host is allowed
318         * to do wakeup during suspend. Since xhci_plat_suspend is currently
319         * only designed for system suspend, device_may_wakeup() is enough
320         * to dertermine whether host is allowed to do wakeup. Need to
321         * reconsider this when xhci_plat_suspend enlarges its scope, e.g.,
322         * also applies to runtime suspend.
323         */
324        return xhci_suspend(xhci, device_may_wakeup(dev));
325}
326
327static int xhci_plat_resume(struct device *dev)
328{
329        struct usb_hcd  *hcd = dev_get_drvdata(dev);
330        struct xhci_hcd *xhci = hcd_to_xhci(hcd);
331
332        return xhci_resume(xhci, 0);
333}
334
335static const struct dev_pm_ops xhci_plat_pm_ops = {
336        SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume)
337};
338#define DEV_PM_OPS      (&xhci_plat_pm_ops)
339#else
340#define DEV_PM_OPS      NULL
341#endif /* CONFIG_PM */
342
343static const struct acpi_device_id usb_xhci_acpi_match[] = {
344        /* XHCI-compliant USB Controller */
345        { "PNP0D10", },
346        { }
347};
348MODULE_DEVICE_TABLE(acpi, usb_xhci_acpi_match);
349
350static struct platform_driver usb_xhci_driver = {
351        .probe  = xhci_plat_probe,
352        .remove = xhci_plat_remove,
353        .driver = {
354                .name = "xhci-hcd",
355                .pm = DEV_PM_OPS,
356                .of_match_table = of_match_ptr(usb_xhci_of_match),
357                .acpi_match_table = ACPI_PTR(usb_xhci_acpi_match),
358        },
359};
360MODULE_ALIAS("platform:xhci-hcd");
361
362static int __init xhci_plat_init(void)
363{
364        xhci_init_driver(&xhci_plat_hc_driver, &xhci_plat_overrides);
365        return platform_driver_register(&usb_xhci_driver);
366}
367module_init(xhci_plat_init);
368
369static void __exit xhci_plat_exit(void)
370{
371        platform_driver_unregister(&usb_xhci_driver);
372}
373module_exit(xhci_plat_exit);
374
375MODULE_DESCRIPTION("xHCI Platform Host Controller Driver");
376MODULE_LICENSE("GPL");
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