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33#include <linux/platform_device.h>
34#include <linux/mfd/core.h>
35#include <linux/mfd/tmio.h>
36#include <linux/dma-mapping.h>
37
38
39
40
41
42
43#define CCR_REVID 0x08
44#define CCR_BASE 0x10
45#define CCR_ILME 0x40
46#define CCR_PM 0x4c
47#define CCR_INTC 0x50
48#define CCR_LMW1L 0x54
49#define CCR_LMW1H 0x56
50#define CCR_LMW1BL 0x58
51#define CCR_LMW1BH 0x5A
52#define CCR_LMW2L 0x5C
53#define CCR_LMW2H 0x5E
54#define CCR_LMW2BL 0x60
55#define CCR_LMW2BH 0x62
56#define CCR_MISC 0xFC
57
58#define CCR_PM_GKEN 0x0001
59#define CCR_PM_CKRNEN 0x0002
60#define CCR_PM_USBPW1 0x0004
61#define CCR_PM_USBPW2 0x0008
62#define CCR_PM_USBPW3 0x0008
63#define CCR_PM_PMEE 0x0100
64#define CCR_PM_PMES 0x8000
65
66
67
68struct tmio_hcd {
69 void __iomem *ccr;
70 spinlock_t lock;
71};
72
73#define hcd_to_tmio(hcd) ((struct tmio_hcd *)(hcd_to_ohci(hcd) + 1))
74
75
76
77static void tmio_write_pm(struct platform_device *dev)
78{
79 struct usb_hcd *hcd = platform_get_drvdata(dev);
80 struct tmio_hcd *tmio = hcd_to_tmio(hcd);
81 u16 pm;
82 unsigned long flags;
83
84 spin_lock_irqsave(&tmio->lock, flags);
85
86 pm = CCR_PM_GKEN | CCR_PM_CKRNEN |
87 CCR_PM_PMEE | CCR_PM_PMES;
88
89 tmio_iowrite16(pm, tmio->ccr + CCR_PM);
90 spin_unlock_irqrestore(&tmio->lock, flags);
91}
92
93static void tmio_stop_hc(struct platform_device *dev)
94{
95 struct usb_hcd *hcd = platform_get_drvdata(dev);
96 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
97 struct tmio_hcd *tmio = hcd_to_tmio(hcd);
98 u16 pm;
99
100 pm = CCR_PM_GKEN | CCR_PM_CKRNEN;
101 switch (ohci->num_ports) {
102 default:
103 dev_err(&dev->dev, "Unsupported amount of ports: %d\n", ohci->num_ports);
104 case 3:
105 pm |= CCR_PM_USBPW3;
106 case 2:
107 pm |= CCR_PM_USBPW2;
108 case 1:
109 pm |= CCR_PM_USBPW1;
110 }
111 tmio_iowrite8(0, tmio->ccr + CCR_INTC);
112 tmio_iowrite8(0, tmio->ccr + CCR_ILME);
113 tmio_iowrite16(0, tmio->ccr + CCR_BASE);
114 tmio_iowrite16(0, tmio->ccr + CCR_BASE + 2);
115 tmio_iowrite16(pm, tmio->ccr + CCR_PM);
116}
117
118static void tmio_start_hc(struct platform_device *dev)
119{
120 struct usb_hcd *hcd = platform_get_drvdata(dev);
121 struct tmio_hcd *tmio = hcd_to_tmio(hcd);
122 unsigned long base = hcd->rsrc_start;
123
124 tmio_write_pm(dev);
125 tmio_iowrite16(base, tmio->ccr + CCR_BASE);
126 tmio_iowrite16(base >> 16, tmio->ccr + CCR_BASE + 2);
127 tmio_iowrite8(1, tmio->ccr + CCR_ILME);
128 tmio_iowrite8(2, tmio->ccr + CCR_INTC);
129
130 dev_info(&dev->dev, "revision %d @ 0x%08llx, irq %d\n",
131 tmio_ioread8(tmio->ccr + CCR_REVID), hcd->rsrc_start, hcd->irq);
132}
133
134static int ohci_tmio_start(struct usb_hcd *hcd)
135{
136 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
137 int ret;
138
139 if ((ret = ohci_init(ohci)) < 0)
140 return ret;
141
142 if ((ret = ohci_run(ohci)) < 0) {
143 err("can't start %s", hcd->self.bus_name);
144 ohci_stop(hcd);
145 return ret;
146 }
147
148 return 0;
149}
150
151static const struct hc_driver ohci_tmio_hc_driver = {
152 .description = hcd_name,
153 .product_desc = "TMIO OHCI USB Host Controller",
154 .hcd_priv_size = sizeof(struct ohci_hcd) + sizeof (struct tmio_hcd),
155
156
157 .irq = ohci_irq,
158 .flags = HCD_USB11 | HCD_MEMORY | HCD_LOCAL_MEM,
159
160
161 .start = ohci_tmio_start,
162 .stop = ohci_stop,
163 .shutdown = ohci_shutdown,
164
165
166 .urb_enqueue = ohci_urb_enqueue,
167 .urb_dequeue = ohci_urb_dequeue,
168 .endpoint_disable = ohci_endpoint_disable,
169
170
171 .get_frame_number = ohci_get_frame,
172
173
174 .hub_status_data = ohci_hub_status_data,
175 .hub_control = ohci_hub_control,
176#ifdef CONFIG_PM
177 .bus_suspend = ohci_bus_suspend,
178 .bus_resume = ohci_bus_resume,
179#endif
180 .start_port_reset = ohci_start_port_reset,
181};
182
183
184static struct platform_driver ohci_hcd_tmio_driver;
185
186static int __devinit ohci_hcd_tmio_drv_probe(struct platform_device *dev)
187{
188 struct mfd_cell *cell = dev->dev.platform_data;
189 struct resource *regs = platform_get_resource(dev, IORESOURCE_MEM, 0);
190 struct resource *config = platform_get_resource(dev, IORESOURCE_MEM, 1);
191 struct resource *sram = platform_get_resource(dev, IORESOURCE_MEM, 2);
192 int irq = platform_get_irq(dev, 0);
193 struct tmio_hcd *tmio;
194 struct ohci_hcd *ohci;
195 struct usb_hcd *hcd;
196 int ret;
197
198 if (usb_disabled())
199 return -ENODEV;
200
201 if (!cell)
202 return -EINVAL;
203
204 hcd = usb_create_hcd(&ohci_tmio_hc_driver, &dev->dev, dev_name(&dev->dev));
205 if (!hcd) {
206 ret = -ENOMEM;
207 goto err_usb_create_hcd;
208 }
209
210 hcd->rsrc_start = regs->start;
211 hcd->rsrc_len = regs->end - regs->start + 1;
212
213 tmio = hcd_to_tmio(hcd);
214
215 spin_lock_init(&tmio->lock);
216
217 tmio->ccr = ioremap(config->start, config->end - config->start + 1);
218 if (!tmio->ccr) {
219 ret = -ENOMEM;
220 goto err_ioremap_ccr;
221 }
222
223 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
224 if (!hcd->regs) {
225 ret = -ENOMEM;
226 goto err_ioremap_regs;
227 }
228
229 if (!dma_declare_coherent_memory(&dev->dev, sram->start,
230 sram->start,
231 sram->end - sram->start + 1,
232 DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE)) {
233 ret = -EBUSY;
234 goto err_dma_declare;
235 }
236
237 if (cell->enable) {
238 ret = cell->enable(dev);
239 if (ret)
240 goto err_enable;
241 }
242
243 tmio_start_hc(dev);
244 ohci = hcd_to_ohci(hcd);
245 ohci_hcd_init(ohci);
246
247 ret = usb_add_hcd(hcd, irq, IRQF_DISABLED);
248 if (ret)
249 goto err_add_hcd;
250
251 if (ret == 0)
252 return ret;
253
254 usb_remove_hcd(hcd);
255
256err_add_hcd:
257 tmio_stop_hc(dev);
258 if (cell->disable)
259 cell->disable(dev);
260err_enable:
261 dma_release_declared_memory(&dev->dev);
262err_dma_declare:
263 iounmap(hcd->regs);
264err_ioremap_regs:
265 iounmap(tmio->ccr);
266err_ioremap_ccr:
267 usb_put_hcd(hcd);
268err_usb_create_hcd:
269
270 return ret;
271}
272
273static int __devexit ohci_hcd_tmio_drv_remove(struct platform_device *dev)
274{
275 struct usb_hcd *hcd = platform_get_drvdata(dev);
276 struct tmio_hcd *tmio = hcd_to_tmio(hcd);
277 struct mfd_cell *cell = dev->dev.platform_data;
278
279 usb_remove_hcd(hcd);
280 tmio_stop_hc(dev);
281 if (cell->disable)
282 cell->disable(dev);
283 dma_release_declared_memory(&dev->dev);
284 iounmap(hcd->regs);
285 iounmap(tmio->ccr);
286 usb_put_hcd(hcd);
287
288 platform_set_drvdata(dev, NULL);
289
290 return 0;
291}
292
293#ifdef CONFIG_PM
294static int ohci_hcd_tmio_drv_suspend(struct platform_device *dev, pm_message_t state)
295{
296 struct mfd_cell *cell = dev->dev.platform_data;
297 struct usb_hcd *hcd = platform_get_drvdata(dev);
298 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
299 struct tmio_hcd *tmio = hcd_to_tmio(hcd);
300 unsigned long flags;
301 u8 misc;
302 int ret;
303
304 if (time_before(jiffies, ohci->next_statechange))
305 msleep(5);
306 ohci->next_statechange = jiffies;
307
308 spin_lock_irqsave(&tmio->lock, flags);
309
310 misc = tmio_ioread8(tmio->ccr + CCR_MISC);
311 misc |= 1 << 3;
312 tmio_iowrite8(misc, tmio->ccr + CCR_MISC);
313
314 spin_unlock_irqrestore(&tmio->lock, flags);
315
316 if (cell->suspend) {
317 ret = cell->suspend(dev);
318 if (ret)
319 return ret;
320 }
321
322 hcd->state = HC_STATE_SUSPENDED;
323
324 return 0;
325}
326
327static int ohci_hcd_tmio_drv_resume(struct platform_device *dev)
328{
329 struct mfd_cell *cell = dev->dev.platform_data;
330 struct usb_hcd *hcd = platform_get_drvdata(dev);
331 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
332 struct tmio_hcd *tmio = hcd_to_tmio(hcd);
333 unsigned long flags;
334 u8 misc;
335 int ret;
336
337 if (time_before(jiffies, ohci->next_statechange))
338 msleep(5);
339 ohci->next_statechange = jiffies;
340
341 if (cell->resume) {
342 ret = cell->resume(dev);
343 if (ret)
344 return ret;
345 }
346
347 tmio_start_hc(dev);
348
349 spin_lock_irqsave(&tmio->lock, flags);
350
351 misc = tmio_ioread8(tmio->ccr + CCR_MISC);
352 misc &= ~(1 << 3);
353 tmio_iowrite8(misc, tmio->ccr + CCR_MISC);
354
355 spin_unlock_irqrestore(&tmio->lock, flags);
356
357 ohci_finish_controller_resume(hcd);
358
359 return 0;
360}
361#else
362#define ohci_hcd_tmio_drv_suspend NULL
363#define ohci_hcd_tmio_drv_resume NULL
364#endif
365
366static struct platform_driver ohci_hcd_tmio_driver = {
367 .probe = ohci_hcd_tmio_drv_probe,
368 .remove = __devexit_p(ohci_hcd_tmio_drv_remove),
369 .shutdown = usb_hcd_platform_shutdown,
370 .suspend = ohci_hcd_tmio_drv_suspend,
371 .resume = ohci_hcd_tmio_drv_resume,
372 .driver = {
373 .name = "tmio-ohci",
374 .owner = THIS_MODULE,
375 },
376};
377
