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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),
132 (u64) hcd->rsrc_start, hcd->irq);
133}
134
135static int ohci_tmio_start(struct usb_hcd *hcd)
136{
137 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
138 int ret;
139
140 if ((ret = ohci_init(ohci)) < 0)
141 return ret;
142
143 if ((ret = ohci_run(ohci)) < 0) {
144 dev_err(hcd->self.controller, "can't start %s\n",
145 hcd->self.bus_name);
146 ohci_stop(hcd);
147 return ret;
148 }
149
150 return 0;
151}
152
153static const struct hc_driver ohci_tmio_hc_driver = {
154 .description = hcd_name,
155 .product_desc = "TMIO OHCI USB Host Controller",
156 .hcd_priv_size = sizeof(struct ohci_hcd) + sizeof (struct tmio_hcd),
157
158
159 .irq = ohci_irq,
160 .flags = HCD_USB11 | HCD_MEMORY | HCD_LOCAL_MEM,
161
162
163 .start = ohci_tmio_start,
164 .stop = ohci_stop,
165 .shutdown = ohci_shutdown,
166
167
168 .urb_enqueue = ohci_urb_enqueue,
169 .urb_dequeue = ohci_urb_dequeue,
170 .endpoint_disable = ohci_endpoint_disable,
171
172
173 .get_frame_number = ohci_get_frame,
174
175
176 .hub_status_data = ohci_hub_status_data,
177 .hub_control = ohci_hub_control,
178#ifdef CONFIG_PM
179 .bus_suspend = ohci_bus_suspend,
180 .bus_resume = ohci_bus_resume,
181#endif
182 .start_port_reset = ohci_start_port_reset,
183};
184
185
186static struct platform_driver ohci_hcd_tmio_driver;
187
188static int ohci_hcd_tmio_drv_probe(struct platform_device *dev)
189{
190 const struct mfd_cell *cell = mfd_get_cell(dev);
191 struct resource *regs = platform_get_resource(dev, IORESOURCE_MEM, 0);
192 struct resource *config = platform_get_resource(dev, IORESOURCE_MEM, 1);
193 struct resource *sram = platform_get_resource(dev, IORESOURCE_MEM, 2);
194 int irq = platform_get_irq(dev, 0);
195 struct tmio_hcd *tmio;
196 struct ohci_hcd *ohci;
197 struct usb_hcd *hcd;
198 int ret;
199
200 if (usb_disabled())
201 return -ENODEV;
202
203 if (!cell)
204 return -EINVAL;
205
206 hcd = usb_create_hcd(&ohci_tmio_hc_driver, &dev->dev, dev_name(&dev->dev));
207 if (!hcd) {
208 ret = -ENOMEM;
209 goto err_usb_create_hcd;
210 }
211
212 hcd->rsrc_start = regs->start;
213 hcd->rsrc_len = resource_size(regs);
214
215 tmio = hcd_to_tmio(hcd);
216
217 spin_lock_init(&tmio->lock);
218
219 tmio->ccr = ioremap(config->start, resource_size(config));
220 if (!tmio->ccr) {
221 ret = -ENOMEM;
222 goto err_ioremap_ccr;
223 }
224
225 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
226 if (!hcd->regs) {
227 ret = -ENOMEM;
228 goto err_ioremap_regs;
229 }
230
231 if (!dma_declare_coherent_memory(&dev->dev, sram->start,
232 sram->start,
233 resource_size(sram),
234 DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE)) {
235 ret = -EBUSY;
236 goto err_dma_declare;
237 }
238
239 if (cell->enable) {
240 ret = cell->enable(dev);
241 if (ret)
242 goto err_enable;
243 }
244
245 tmio_start_hc(dev);
246 ohci = hcd_to_ohci(hcd);
247 ohci_hcd_init(ohci);
248
249 ret = usb_add_hcd(hcd, irq, 0);
250 if (ret)
251 goto err_add_hcd;
252
253 if (ret == 0)
254 return ret;
255
256 usb_remove_hcd(hcd);
257
258err_add_hcd:
259 tmio_stop_hc(dev);
260 if (cell->disable)
261 cell->disable(dev);
262err_enable:
263 dma_release_declared_memory(&dev->dev);
264err_dma_declare:
265 iounmap(hcd->regs);
266err_ioremap_regs:
267 iounmap(tmio->ccr);
268err_ioremap_ccr:
269 usb_put_hcd(hcd);
270err_usb_create_hcd:
271
272 return ret;
273}
274
275static int ohci_hcd_tmio_drv_remove(struct platform_device *dev)
276{
277 struct usb_hcd *hcd = platform_get_drvdata(dev);
278 struct tmio_hcd *tmio = hcd_to_tmio(hcd);
279 const struct mfd_cell *cell = mfd_get_cell(dev);
280
281 usb_remove_hcd(hcd);
282 tmio_stop_hc(dev);
283 if (cell->disable)
284 cell->disable(dev);
285 dma_release_declared_memory(&dev->dev);
286 iounmap(hcd->regs);
287 iounmap(tmio->ccr);
288 usb_put_hcd(hcd);
289
290 platform_set_drvdata(dev, NULL);
291
292 return 0;
293}
294
295#ifdef CONFIG_PM
296static int ohci_hcd_tmio_drv_suspend(struct platform_device *dev, pm_message_t state)
297{
298 const struct mfd_cell *cell = mfd_get_cell(dev);
299 struct usb_hcd *hcd = platform_get_drvdata(dev);
300 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
301 struct tmio_hcd *tmio = hcd_to_tmio(hcd);
302 unsigned long flags;
303 u8 misc;
304 int ret;
305
306 if (time_before(jiffies, ohci->next_statechange))
307 msleep(5);
308 ohci->next_statechange = jiffies;
309
310 spin_lock_irqsave(&tmio->lock, flags);
311
312 misc = tmio_ioread8(tmio->ccr + CCR_MISC);
313 misc |= 1 << 3;
314 tmio_iowrite8(misc, tmio->ccr + CCR_MISC);
315
316 spin_unlock_irqrestore(&tmio->lock, flags);
317
318 if (cell->suspend) {
319 ret = cell->suspend(dev);
320 if (ret)
321 return ret;
322 }
323 return 0;
324}
325
326static int ohci_hcd_tmio_drv_resume(struct platform_device *dev)
327{
328 const struct mfd_cell *cell = mfd_get_cell(dev);
329 struct usb_hcd *hcd = platform_get_drvdata(dev);
330 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
331 struct tmio_hcd *tmio = hcd_to_tmio(hcd);
332 unsigned long flags;
333 u8 misc;
334 int ret;
335
336 if (time_before(jiffies, ohci->next_statechange))
337 msleep(5);
338 ohci->next_statechange = jiffies;
339
340 if (cell->resume) {
341 ret = cell->resume(dev);
342 if (ret)
343 return ret;
344 }
345
346 tmio_start_hc(dev);
347
348 spin_lock_irqsave(&tmio->lock, flags);
349
350 misc = tmio_ioread8(tmio->ccr + CCR_MISC);
351 misc &= ~(1 << 3);
352 tmio_iowrite8(misc, tmio->ccr + CCR_MISC);
353
354 spin_unlock_irqrestore(&tmio->lock, flags);
355
356 ohci_resume(hcd, false);
357
358 return 0;
359}
360#else
361#define ohci_hcd_tmio_drv_suspend NULL
362#define ohci_hcd_tmio_drv_resume NULL
363#endif
364
365static struct platform_driver ohci_hcd_tmio_driver = {
366 .probe = ohci_hcd_tmio_drv_probe,
367 .remove = ohci_hcd_tmio_drv_remove,
368 .shutdown = usb_hcd_platform_shutdown,
369 .suspend = ohci_hcd_tmio_drv_suspend,
370 .resume = ohci_hcd_tmio_drv_resume,
371 .driver = {
372 .name = "tmio-ohci",
373 .owner = THIS_MODULE,
374 },
375};
376
