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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/platform_device.h>
15#include <linux/module.h>
16#include <linux/slab.h>
17
18#include "xhci.h"
19
20static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
21{
22 /*
23 * As of now platform drivers don't provide MSI support so we ensure
24 * here that the generic code does not try to make a pci_dev from our
25 * dev struct in order to setup MSI
26 */
27 xhci->quirks |= XHCI_BROKEN_MSI;
28}
29
30/* called during probe() after chip reset completes */
31static int xhci_plat_setup(struct usb_hcd *hcd)
32{
33 return xhci_gen_setup(hcd, xhci_plat_quirks);
34}
35
36static const struct hc_driver xhci_plat_xhci_driver = {
37 .description = "xhci-hcd",
38 .product_desc = "xHCI Host Controller",
39 .hcd_priv_size = sizeof(struct xhci_hcd *),
40
41 /*
42 * generic hardware linkage
43 */
44 .irq = xhci_irq,
45 .flags = HCD_MEMORY | HCD_USB3 | HCD_SHARED,
46
47 /*
48 * basic lifecycle operations
49 */
50 .reset = xhci_plat_setup,
51 .start = xhci_run,
52 .stop = xhci_stop,
53 .shutdown = xhci_shutdown,
54
55 /*
56 * managing i/o requests and associated device resources
57 */
58 .urb_enqueue = xhci_urb_enqueue,
59 .urb_dequeue = xhci_urb_dequeue,
60 .alloc_dev = xhci_alloc_dev,
61 .free_dev = xhci_free_dev,
62 .alloc_streams = xhci_alloc_streams,
63 .free_streams = xhci_free_streams,
64 .add_endpoint = xhci_add_endpoint,
65 .drop_endpoint = xhci_drop_endpoint,
66 .endpoint_reset = xhci_endpoint_reset,
67 .check_bandwidth = xhci_check_bandwidth,
68 .reset_bandwidth = xhci_reset_bandwidth,
69 .address_device = xhci_address_device,
70 .update_hub_device = xhci_update_hub_device,
71 .reset_device = xhci_discover_or_reset_device,
72
73 /*
74 * scheduling support
75 */
76 .get_frame_number = xhci_get_frame,
77
78 /* Root hub support */
79 .hub_control = xhci_hub_control,
80 .hub_status_data = xhci_hub_status_data,
81 .bus_suspend = xhci_bus_suspend,
82 .bus_resume = xhci_bus_resume,
83};
84
85static int xhci_plat_probe(struct platform_device *pdev)
86{
87 const struct hc_driver *driver;
88 struct xhci_hcd *xhci;
89 struct resource *res;
90 struct usb_hcd *hcd;
91 int ret;
92 int irq;
93
94 if (usb_disabled())
95 return -ENODEV;
96
97 driver = &xhci_plat_xhci_driver;
98
99 irq = platform_get_irq(pdev, 0);
100 if (irq < 0)
101 return -ENODEV;
102
103 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
104 if (!res)
105 return -ENODEV;
106
107 hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
108 if (!hcd)
109 return -ENOMEM;
110
111 hcd->rsrc_start = res->start;
112 hcd->rsrc_len = resource_size(res);
113
114 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
115 driver->description)) {
116 dev_dbg(&pdev->dev, "controller already in use\n");
117 ret = -EBUSY;
118 goto put_hcd;
119 }
120
121 hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
122 if (!hcd->regs) {
123 dev_dbg(&pdev->dev, "error mapping memory\n");
124 ret = -EFAULT;
125 goto release_mem_region;
126 }
127
128 ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
129 if (ret)
130 goto unmap_registers;
131
132 /* USB 2.0 roothub is stored in the platform_device now. */
133 hcd = dev_get_drvdata(&pdev->dev);
134 xhci = hcd_to_xhci(hcd);
135 xhci->shared_hcd = usb_create_shared_hcd(driver, &pdev->dev,
136 dev_name(&pdev->dev), hcd);
137 if (!xhci->shared_hcd) {
138 ret = -ENOMEM;
139 goto dealloc_usb2_hcd;
140 }
141
142 /*
143 * Set the xHCI pointer before xhci_plat_setup() (aka hcd_driver.reset)
144 * is called by usb_add_hcd().
145 */
146 *((struct xhci_hcd **) xhci->shared_hcd->hcd_priv) = xhci;
147
148 ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
149 if (ret)
150 goto put_usb3_hcd;
151
152 return 0;
153
154put_usb3_hcd:
155 usb_put_hcd(xhci->shared_hcd);
156
157dealloc_usb2_hcd:
158 usb_remove_hcd(hcd);
159
160unmap_registers:
161 iounmap(hcd->regs);
162
163release_mem_region:
164 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
165
166put_hcd:
167 usb_put_hcd(hcd);
168
169 return ret;
170}
171
172static int xhci_plat_remove(struct platform_device *dev)
173{
174 struct usb_hcd *hcd = platform_get_drvdata(dev);
175 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
176
177 usb_remove_hcd(xhci->shared_hcd);
178 usb_put_hcd(xhci->shared_hcd);
179
180 usb_remove_hcd(hcd);
181 iounmap(hcd->regs);
182 usb_put_hcd(hcd);
183 kfree(xhci);
184
185 return 0;
186}
187
188static struct platform_driver usb_xhci_driver = {
189 .probe = xhci_plat_probe,
190 .remove = xhci_plat_remove,
191 .driver = {
192 .name = "xhci-hcd",
193 },
194};
195MODULE_ALIAS("platform:xhci-hcd");
196
197int xhci_register_plat(void)
198{
199 return platform_driver_register(&usb_xhci_driver);
200}
201
202void xhci_unregister_plat(void)
203{
204 platform_driver_unregister(&usb_xhci_driver);
205}
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/platform_device.h>
15#include <linux/module.h>
16#include <linux/slab.h>
17#include <linux/of.h>
18#include <linux/dma-mapping.h>
19
20#include "xhci.h"
21
22static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
23{
24 /*
25 * As of now platform drivers don't provide MSI support so we ensure
26 * here that the generic code does not try to make a pci_dev from our
27 * dev struct in order to setup MSI
28 */
29 xhci->quirks |= XHCI_PLAT;
30}
31
32/* called during probe() after chip reset completes */
33static int xhci_plat_setup(struct usb_hcd *hcd)
34{
35 return xhci_gen_setup(hcd, xhci_plat_quirks);
36}
37
38static const struct hc_driver xhci_plat_xhci_driver = {
39 .description = "xhci-hcd",
40 .product_desc = "xHCI Host Controller",
41 .hcd_priv_size = sizeof(struct xhci_hcd *),
42
43 /*
44 * generic hardware linkage
45 */
46 .irq = xhci_irq,
47 .flags = HCD_MEMORY | HCD_USB3 | HCD_SHARED,
48
49 /*
50 * basic lifecycle operations
51 */
52 .reset = xhci_plat_setup,
53 .start = xhci_run,
54 .stop = xhci_stop,
55 .shutdown = xhci_shutdown,
56
57 /*
58 * managing i/o requests and associated device resources
59 */
60 .urb_enqueue = xhci_urb_enqueue,
61 .urb_dequeue = xhci_urb_dequeue,
62 .alloc_dev = xhci_alloc_dev,
63 .free_dev = xhci_free_dev,
64 .alloc_streams = xhci_alloc_streams,
65 .free_streams = xhci_free_streams,
66 .add_endpoint = xhci_add_endpoint,
67 .drop_endpoint = xhci_drop_endpoint,
68 .endpoint_reset = xhci_endpoint_reset,
69 .check_bandwidth = xhci_check_bandwidth,
70 .reset_bandwidth = xhci_reset_bandwidth,
71 .address_device = xhci_address_device,
72 .enable_device = xhci_enable_device,
73 .update_hub_device = xhci_update_hub_device,
74 .reset_device = xhci_discover_or_reset_device,
75
76 /*
77 * scheduling support
78 */
79 .get_frame_number = xhci_get_frame,
80
81 /* Root hub support */
82 .hub_control = xhci_hub_control,
83 .hub_status_data = xhci_hub_status_data,
84 .bus_suspend = xhci_bus_suspend,
85 .bus_resume = xhci_bus_resume,
86};
87
88static int xhci_plat_probe(struct platform_device *pdev)
89{
90 const struct hc_driver *driver;
91 struct xhci_hcd *xhci;
92 struct resource *res;
93 struct usb_hcd *hcd;
94 int ret;
95 int irq;
96
97 if (usb_disabled())
98 return -ENODEV;
99
100 driver = &xhci_plat_xhci_driver;
101
102 irq = platform_get_irq(pdev, 0);
103 if (irq < 0)
104 return -ENODEV;
105
106 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
107 if (!res)
108 return -ENODEV;
109
110 /* Initialize dma_mask and coherent_dma_mask to 32-bits */
111 ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
112 if (ret)
113 return ret;
114 if (!pdev->dev.dma_mask)
115 pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
116 else
117 dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
118
119 hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
120 if (!hcd)
121 return -ENOMEM;
122
123 hcd->rsrc_start = res->start;
124 hcd->rsrc_len = resource_size(res);
125
126 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
127 driver->description)) {
128 dev_dbg(&pdev->dev, "controller already in use\n");
129 ret = -EBUSY;
130 goto put_hcd;
131 }
132
133 hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
134 if (!hcd->regs) {
135 dev_dbg(&pdev->dev, "error mapping memory\n");
136 ret = -EFAULT;
137 goto release_mem_region;
138 }
139
140 ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
141 if (ret)
142 goto unmap_registers;
143 device_wakeup_enable(hcd->self.controller);
144
145 /* USB 2.0 roothub is stored in the platform_device now. */
146 hcd = platform_get_drvdata(pdev);
147 xhci = hcd_to_xhci(hcd);
148 xhci->shared_hcd = usb_create_shared_hcd(driver, &pdev->dev,
149 dev_name(&pdev->dev), hcd);
150 if (!xhci->shared_hcd) {
151 ret = -ENOMEM;
152 goto dealloc_usb2_hcd;
153 }
154
155 /*
156 * Set the xHCI pointer before xhci_plat_setup() (aka hcd_driver.reset)
157 * is called by usb_add_hcd().
158 */
159 *((struct xhci_hcd **) xhci->shared_hcd->hcd_priv) = xhci;
160
161 if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
162 xhci->shared_hcd->can_do_streams = 1;
163
164 ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
165 if (ret)
166 goto put_usb3_hcd;
167
168 return 0;
169
170put_usb3_hcd:
171 usb_put_hcd(xhci->shared_hcd);
172
173dealloc_usb2_hcd:
174 usb_remove_hcd(hcd);
175
176unmap_registers:
177 iounmap(hcd->regs);
178
179release_mem_region:
180 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
181
182put_hcd:
183 usb_put_hcd(hcd);
184
185 return ret;
186}
187
188static int xhci_plat_remove(struct platform_device *dev)
189{
190 struct usb_hcd *hcd = platform_get_drvdata(dev);
191 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
192
193 usb_remove_hcd(xhci->shared_hcd);
194 usb_put_hcd(xhci->shared_hcd);
195
196 usb_remove_hcd(hcd);
197 iounmap(hcd->regs);
198 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
199 usb_put_hcd(hcd);
200 kfree(xhci);
201
202 return 0;
203}
204
205#ifdef CONFIG_PM
206static int xhci_plat_suspend(struct device *dev)
207{
208 struct usb_hcd *hcd = dev_get_drvdata(dev);
209 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
210
211 return xhci_suspend(xhci);
212}
213
214static int xhci_plat_resume(struct device *dev)
215{
216 struct usb_hcd *hcd = dev_get_drvdata(dev);
217 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
218
219 return xhci_resume(xhci, 0);
220}
221
222static const struct dev_pm_ops xhci_plat_pm_ops = {
223 SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume)
224};
225#define DEV_PM_OPS (&xhci_plat_pm_ops)
226#else
227#define DEV_PM_OPS NULL
228#endif /* CONFIG_PM */
229
230#ifdef CONFIG_OF
231static const struct of_device_id usb_xhci_of_match[] = {
232 { .compatible = "generic-xhci" },
233 { .compatible = "xhci-platform" },
234 { },
235};
236MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
237#endif
238
239static struct platform_driver usb_xhci_driver = {
240 .probe = xhci_plat_probe,
241 .remove = xhci_plat_remove,
242 .driver = {
243 .name = "xhci-hcd",
244 .pm = DEV_PM_OPS,
245 .of_match_table = of_match_ptr(usb_xhci_of_match),
246 },
247};
248MODULE_ALIAS("platform:xhci-hcd");
249
250int xhci_register_plat(void)
251{
252 return platform_driver_register(&usb_xhci_driver);
253}
254
255void xhci_unregister_plat(void)
256{
257 platform_driver_unregister(&usb_xhci_driver);
258}