]> git.openfabrics.org - ~shefty/rdma-dev.git/blob - drivers/usb/host/ohci-tmio.c
d370245a4ee22af7716983da3b48a9791251a4ff
[~shefty/rdma-dev.git] / drivers / usb / host / ohci-tmio.c
1 /*
2  * OHCI HCD(Host Controller Driver) for USB.
3  *
4  *(C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
5  *(C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
6  *(C) Copyright 2002 Hewlett-Packard Company
7  *
8  * Bus glue for Toshiba Mobile IO(TMIO) Controller's OHCI core
9  * (C) Copyright 2005 Chris Humbert <mahadri-usb@drigon.com>
10  * (C) Copyright 2007, 2008 Dmitry Baryshkov <dbaryshkov@gmail.com>
11  *
12  * This is known to work with the following variants:
13  *      TC6393XB revision 3     (32kB SRAM)
14  *
15  * The TMIO's OHCI core DMAs through a small internal buffer that
16  * is directly addressable by the CPU.
17  *
18  * Written from sparse documentation from Toshiba and Sharp's driver
19  * for the 2.4 kernel,
20  *      usb-ohci-tc6393.c(C) Copyright 2004 Lineo Solutions, Inc.
21  *
22  * This program is free software; you can redistribute it and/or modify
23  * it under the terms of the GNU General Public License version 2 as
24  * published by the Free Software Foundation.
25  */
26
27 /*#include <linux/fs.h>
28 #include <linux/mount.h>
29 #include <linux/pagemap.h>
30 #include <linux/init.h>
31 #include <linux/namei.h>
32 #include <linux/sched.h>*/
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  * USB Host Controller Configuration Register
42  */
43 #define CCR_REVID       0x08    /* b Revision ID                                */
44 #define CCR_BASE        0x10    /* l USB Control Register Base Address Low      */
45 #define CCR_ILME        0x40    /* b Internal Local Memory Enable               */
46 #define CCR_PM          0x4c    /* w Power Management                   */
47 #define CCR_INTC        0x50    /* b INT Control                                */
48 #define CCR_LMW1L       0x54    /* w Local Memory Window 1 LMADRS Low   */
49 #define CCR_LMW1H       0x56    /* w Local Memory Window 1 LMADRS High  */
50 #define CCR_LMW1BL      0x58    /* w Local Memory Window 1 Base Address Low     */
51 #define CCR_LMW1BH      0x5A    /* w Local Memory Window 1 Base Address High    */
52 #define CCR_LMW2L       0x5C    /* w Local Memory Window 2 LMADRS Low   */
53 #define CCR_LMW2H       0x5E    /* w Local Memory Window 2 LMADRS High  */
54 #define CCR_LMW2BL      0x60    /* w Local Memory Window 2 Base Address Low     */
55 #define CCR_LMW2BH      0x62    /* w Local Memory Window 2 Base Address High    */
56 #define CCR_MISC        0xFC    /* b MISC                                       */
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
68 struct tmio_hcd {
69         void __iomem            *ccr;
70         spinlock_t              lock; /* protects RMW cycles */
71 };
72
73 #define hcd_to_tmio(hcd)        ((struct tmio_hcd *)(hcd_to_ohci(hcd) + 1))
74
75 /*-------------------------------------------------------------------------*/
76
77 static 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
93 static 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
118 static 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
134 static 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                 dev_err(hcd->self.controller, "can't start %s\n",
144                         hcd->self.bus_name);
145                 ohci_stop(hcd);
146                 return ret;
147         }
148
149         return 0;
150 }
151
152 static const struct hc_driver ohci_tmio_hc_driver = {
153         .description =          hcd_name,
154         .product_desc =         "TMIO OHCI USB Host Controller",
155         .hcd_priv_size =        sizeof(struct ohci_hcd) + sizeof (struct tmio_hcd),
156
157         /* generic hardware linkage */
158         .irq =                  ohci_irq,
159         .flags =                HCD_USB11 | HCD_MEMORY | HCD_LOCAL_MEM,
160
161         /* basic lifecycle operations */
162         .start =                ohci_tmio_start,
163         .stop =                 ohci_stop,
164         .shutdown =             ohci_shutdown,
165
166         /* managing i/o requests and associated device resources */
167         .urb_enqueue =          ohci_urb_enqueue,
168         .urb_dequeue =          ohci_urb_dequeue,
169         .endpoint_disable =     ohci_endpoint_disable,
170
171         /* scheduling support */
172         .get_frame_number =     ohci_get_frame,
173
174         /* root hub support */
175         .hub_status_data =      ohci_hub_status_data,
176         .hub_control =          ohci_hub_control,
177 #ifdef  CONFIG_PM
178         .bus_suspend =          ohci_bus_suspend,
179         .bus_resume =           ohci_bus_resume,
180 #endif
181         .start_port_reset =     ohci_start_port_reset,
182 };
183
184 /*-------------------------------------------------------------------------*/
185 static struct platform_driver ohci_hcd_tmio_driver;
186
187 static int ohci_hcd_tmio_drv_probe(struct platform_device *dev)
188 {
189         const struct mfd_cell *cell = mfd_get_cell(dev);
190         struct resource *regs = platform_get_resource(dev, IORESOURCE_MEM, 0);
191         struct resource *config = platform_get_resource(dev, IORESOURCE_MEM, 1);
192         struct resource *sram = platform_get_resource(dev, IORESOURCE_MEM, 2);
193         int irq = platform_get_irq(dev, 0);
194         struct tmio_hcd *tmio;
195         struct ohci_hcd *ohci;
196         struct usb_hcd *hcd;
197         int ret;
198
199         if (usb_disabled())
200                 return -ENODEV;
201
202         if (!cell)
203                 return -EINVAL;
204
205         hcd = usb_create_hcd(&ohci_tmio_hc_driver, &dev->dev, dev_name(&dev->dev));
206         if (!hcd) {
207                 ret = -ENOMEM;
208                 goto err_usb_create_hcd;
209         }
210
211         hcd->rsrc_start = regs->start;
212         hcd->rsrc_len = resource_size(regs);
213
214         tmio = hcd_to_tmio(hcd);
215
216         spin_lock_init(&tmio->lock);
217
218         tmio->ccr = ioremap(config->start, resource_size(config));
219         if (!tmio->ccr) {
220                 ret = -ENOMEM;
221                 goto err_ioremap_ccr;
222         }
223
224         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
225         if (!hcd->regs) {
226                 ret = -ENOMEM;
227                 goto err_ioremap_regs;
228         }
229
230         if (!dma_declare_coherent_memory(&dev->dev, sram->start,
231                                 sram->start,
232                                 resource_size(sram),
233                                 DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE)) {
234                 ret = -EBUSY;
235                 goto err_dma_declare;
236         }
237
238         if (cell->enable) {
239                 ret = cell->enable(dev);
240                 if (ret)
241                         goto err_enable;
242         }
243
244         tmio_start_hc(dev);
245         ohci = hcd_to_ohci(hcd);
246         ohci_hcd_init(ohci);
247
248         ret = usb_add_hcd(hcd, irq, 0);
249         if (ret)
250                 goto err_add_hcd;
251
252         if (ret == 0)
253                 return ret;
254
255         usb_remove_hcd(hcd);
256
257 err_add_hcd:
258         tmio_stop_hc(dev);
259         if (cell->disable)
260                 cell->disable(dev);
261 err_enable:
262         dma_release_declared_memory(&dev->dev);
263 err_dma_declare:
264         iounmap(hcd->regs);
265 err_ioremap_regs:
266         iounmap(tmio->ccr);
267 err_ioremap_ccr:
268         usb_put_hcd(hcd);
269 err_usb_create_hcd:
270
271         return ret;
272 }
273
274 static int ohci_hcd_tmio_drv_remove(struct platform_device *dev)
275 {
276         struct usb_hcd *hcd = platform_get_drvdata(dev);
277         struct tmio_hcd *tmio = hcd_to_tmio(hcd);
278         const struct mfd_cell *cell = mfd_get_cell(dev);
279
280         usb_remove_hcd(hcd);
281         tmio_stop_hc(dev);
282         if (cell->disable)
283                 cell->disable(dev);
284         dma_release_declared_memory(&dev->dev);
285         iounmap(hcd->regs);
286         iounmap(tmio->ccr);
287         usb_put_hcd(hcd);
288
289         platform_set_drvdata(dev, NULL);
290
291         return 0;
292 }
293
294 #ifdef CONFIG_PM
295 static int ohci_hcd_tmio_drv_suspend(struct platform_device *dev, pm_message_t state)
296 {
297         const struct mfd_cell *cell = mfd_get_cell(dev);
298         struct usb_hcd *hcd = platform_get_drvdata(dev);
299         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
300         struct tmio_hcd *tmio = hcd_to_tmio(hcd);
301         unsigned long flags;
302         u8 misc;
303         int ret;
304
305         if (time_before(jiffies, ohci->next_statechange))
306                 msleep(5);
307         ohci->next_statechange = jiffies;
308
309         spin_lock_irqsave(&tmio->lock, flags);
310
311         misc = tmio_ioread8(tmio->ccr + CCR_MISC);
312         misc |= 1 << 3; /* USSUSP */
313         tmio_iowrite8(misc, tmio->ccr + CCR_MISC);
314
315         spin_unlock_irqrestore(&tmio->lock, flags);
316
317         if (cell->suspend) {
318                 ret = cell->suspend(dev);
319                 if (ret)
320                         return ret;
321         }
322         return 0;
323 }
324
325 static int ohci_hcd_tmio_drv_resume(struct platform_device *dev)
326 {
327         const struct mfd_cell *cell = mfd_get_cell(dev);
328         struct usb_hcd *hcd = platform_get_drvdata(dev);
329         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
330         struct tmio_hcd *tmio = hcd_to_tmio(hcd);
331         unsigned long flags;
332         u8 misc;
333         int ret;
334
335         if (time_before(jiffies, ohci->next_statechange))
336                 msleep(5);
337         ohci->next_statechange = jiffies;
338
339         if (cell->resume) {
340                 ret = cell->resume(dev);
341                 if (ret)
342                         return ret;
343         }
344
345         tmio_start_hc(dev);
346
347         spin_lock_irqsave(&tmio->lock, flags);
348
349         misc = tmio_ioread8(tmio->ccr + CCR_MISC);
350         misc &= ~(1 << 3); /* USSUSP */
351         tmio_iowrite8(misc, tmio->ccr + CCR_MISC);
352
353         spin_unlock_irqrestore(&tmio->lock, flags);
354
355         ohci_resume(hcd, false);
356
357         return 0;
358 }
359 #else
360 #define ohci_hcd_tmio_drv_suspend NULL
361 #define ohci_hcd_tmio_drv_resume NULL
362 #endif
363
364 static struct platform_driver ohci_hcd_tmio_driver = {
365         .probe          = ohci_hcd_tmio_drv_probe,
366         .remove         = ohci_hcd_tmio_drv_remove,
367         .shutdown       = usb_hcd_platform_shutdown,
368         .suspend        = ohci_hcd_tmio_drv_suspend,
369         .resume         = ohci_hcd_tmio_drv_resume,
370         .driver         = {
371                 .name   = "tmio-ohci",
372                 .owner  = THIS_MODULE,
373         },
374 };