1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20#include <linux/kernel.h>
21#include <linux/module.h>
22#include <linux/io.h>
23#include <linux/platform_device.h>
24#include <linux/slab.h>
25#include <linux/usb/ulpi.h>
26#include <linux/pm_runtime.h>
27#include <linux/clk.h>
28#include <linux/usb.h>
29#include <linux/usb/hcd.h>
30#include <linux/of.h>
31#include <linux/dma-mapping.h>
32
33#include "ehci.h"
34
35#include <linux/platform_data/usb-omap.h>
36
37
38#define EHCI_INSNREG04 (0xA0)
39#define EHCI_INSNREG04_DISABLE_UNSUSPEND (1 << 5)
40#define EHCI_INSNREG05_ULPI (0xA4)
41#define EHCI_INSNREG05_ULPI_CONTROL_SHIFT 31
42#define EHCI_INSNREG05_ULPI_PORTSEL_SHIFT 24
43#define EHCI_INSNREG05_ULPI_OPSEL_SHIFT 22
44#define EHCI_INSNREG05_ULPI_REGADD_SHIFT 16
45#define EHCI_INSNREG05_ULPI_EXTREGADD_SHIFT 8
46#define EHCI_INSNREG05_ULPI_WRDATA_SHIFT 0
47
48#define DRIVER_DESC "OMAP-EHCI Host Controller driver"
49
50static const char hcd_name[] = "ehci-omap";
51
52
53
54struct omap_hcd {
55 struct usb_phy *phy[OMAP3_HS_USB_PORTS];
56 int nports;
57};
58
59static inline void ehci_write(void __iomem *base, u32 reg, u32 val)
60{
61 __raw_writel(val, base + reg);
62}
63
64static inline u32 ehci_read(void __iomem *base, u32 reg)
65{
66 return __raw_readl(base + reg);
67}
68
69
70
71
72static struct hc_driver __read_mostly ehci_omap_hc_driver;
73
74static const struct ehci_driver_overrides ehci_omap_overrides __initconst = {
75 .extra_priv_size = sizeof(struct omap_hcd),
76};
77
78
79
80
81
82
83
84
85
86static int ehci_hcd_omap_probe(struct platform_device *pdev)
87{
88 struct device *dev = &pdev->dev;
89 struct usbhs_omap_platform_data *pdata = dev_get_platdata(dev);
90 struct resource *res;
91 struct usb_hcd *hcd;
92 void __iomem *regs;
93 int ret;
94 int irq;
95 int i;
96 struct omap_hcd *omap;
97
98 if (usb_disabled())
99 return -ENODEV;
100
101 if (!dev->parent) {
102 dev_err(dev, "Missing parent device\n");
103 return -ENODEV;
104 }
105
106
107 if (dev->of_node) {
108 pdata = dev_get_platdata(dev->parent);
109 dev->platform_data = pdata;
110 }
111
112 if (!pdata) {
113 dev_err(dev, "Missing platform data\n");
114 return -ENODEV;
115 }
116
117 irq = platform_get_irq(pdev, 0);
118 if (irq < 0)
119 return irq;
120
121 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
122 regs = devm_ioremap_resource(dev, res);
123 if (IS_ERR(regs))
124 return PTR_ERR(regs);
125
126
127
128
129
130
131 ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32));
132 if (ret)
133 return ret;
134
135 ret = -ENODEV;
136 hcd = usb_create_hcd(&ehci_omap_hc_driver, dev,
137 dev_name(dev));
138 if (!hcd) {
139 dev_err(dev, "Failed to create HCD\n");
140 return -ENOMEM;
141 }
142
143 hcd->rsrc_start = res->start;
144 hcd->rsrc_len = resource_size(res);
145 hcd->regs = regs;
146 hcd_to_ehci(hcd)->caps = regs;
147
148 omap = (struct omap_hcd *)hcd_to_ehci(hcd)->priv;
149 omap->nports = pdata->nports;
150
151 platform_set_drvdata(pdev, hcd);
152
153
154 for (i = 0 ; i < omap->nports ; i++) {
155 struct usb_phy *phy;
156
157
158 phy = devm_usb_get_phy_by_phandle(dev, "phys", i);
159 if (IS_ERR(phy)) {
160 ret = PTR_ERR(phy);
161 if (ret == -ENODEV) {
162 phy = NULL;
163 continue;
164 }
165
166 if (ret != -EPROBE_DEFER)
167 dev_err(dev, "Can't get PHY for port %d: %d\n",
168 i, ret);
169 goto err_phy;
170 }
171
172 omap->phy[i] = phy;
173
174 if (pdata->port_mode[i] == OMAP_EHCI_PORT_MODE_PHY) {
175 usb_phy_init(omap->phy[i]);
176
177 usb_phy_set_suspend(omap->phy[i], 0);
178 }
179 }
180
181 pm_runtime_enable(dev);
182 pm_runtime_get_sync(dev);
183
184
185
186
187
188
189
190
191
192
193 ehci_write(regs, EHCI_INSNREG04,
194 EHCI_INSNREG04_DISABLE_UNSUSPEND);
195
196 ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
197 if (ret) {
198 dev_err(dev, "failed to add hcd with err %d\n", ret);
199 goto err_pm_runtime;
200 }
201 device_wakeup_enable(hcd->self.controller);
202
203
204
205
206
207
208
209 for (i = 0; i < omap->nports; i++) {
210 if (!omap->phy[i] ||
211 pdata->port_mode[i] == OMAP_EHCI_PORT_MODE_PHY)
212 continue;
213
214 usb_phy_init(omap->phy[i]);
215
216 usb_phy_set_suspend(omap->phy[i], 0);
217 }
218
219 return 0;
220
221err_pm_runtime:
222 pm_runtime_put_sync(dev);
223
224err_phy:
225 for (i = 0; i < omap->nports; i++) {
226 if (omap->phy[i])
227 usb_phy_shutdown(omap->phy[i]);
228 }
229
230 usb_put_hcd(hcd);
231
232 return ret;
233}
234
235
236
237
238
239
240
241
242
243
244static int ehci_hcd_omap_remove(struct platform_device *pdev)
245{
246 struct device *dev = &pdev->dev;
247 struct usb_hcd *hcd = dev_get_drvdata(dev);
248 struct omap_hcd *omap = (struct omap_hcd *)hcd_to_ehci(hcd)->priv;
249 int i;
250
251 usb_remove_hcd(hcd);
252
253 for (i = 0; i < omap->nports; i++) {
254 if (omap->phy[i])
255 usb_phy_shutdown(omap->phy[i]);
256 }
257
258 usb_put_hcd(hcd);
259 pm_runtime_put_sync(dev);
260 pm_runtime_disable(dev);
261
262 return 0;
263}
264
265static const struct of_device_id omap_ehci_dt_ids[] = {
266 { .compatible = "ti,ehci-omap" },
267 { }
268};
269
270MODULE_DEVICE_TABLE(of, omap_ehci_dt_ids);
271
272static struct platform_driver ehci_hcd_omap_driver = {
273 .probe = ehci_hcd_omap_probe,
274 .remove = ehci_hcd_omap_remove,
275 .shutdown = usb_hcd_platform_shutdown,
276
277
278 .driver = {
279 .name = hcd_name,
280 .of_match_table = omap_ehci_dt_ids,
281 }
282};
283
284
285
286static int __init ehci_omap_init(void)
287{
288 if (usb_disabled())
289 return -ENODEV;
290
291 pr_info("%s: " DRIVER_DESC "\n", hcd_name);
292
293 ehci_init_driver(&ehci_omap_hc_driver, &ehci_omap_overrides);
294 return platform_driver_register(&ehci_hcd_omap_driver);
295}
296module_init(ehci_omap_init);
297
298static void __exit ehci_omap_cleanup(void)
299{
300 platform_driver_unregister(&ehci_hcd_omap_driver);
301}
302module_exit(ehci_omap_cleanup);
303
304MODULE_ALIAS("platform:ehci-omap");
305MODULE_AUTHOR("Texas Instruments, Inc.");
306MODULE_AUTHOR("Felipe Balbi <felipe.balbi@nokia.com>");
307MODULE_AUTHOR("Roger Quadros <rogerq@ti.com>");
308
309MODULE_DESCRIPTION(DRIVER_DESC);
310MODULE_LICENSE("GPL");
311