Commit | Line | Data |
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78c73414 DB |
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> | |
78c73414 DB |
30 | #include <linux/namei.h> |
31 | #include <linux/sched.h>*/ | |
32 | #include <linux/platform_device.h> | |
33 | #include <linux/mfd/core.h> | |
34 | #include <linux/mfd/tmio.h> | |
35 | #include <linux/dma-mapping.h> | |
36 | ||
37 | /*-------------------------------------------------------------------------*/ | |
38 | ||
39 | /* | |
40 | * USB Host Controller Configuration Register | |
41 | */ | |
42 | #define CCR_REVID 0x08 /* b Revision ID */ | |
43 | #define CCR_BASE 0x10 /* l USB Control Register Base Address Low */ | |
44 | #define CCR_ILME 0x40 /* b Internal Local Memory Enable */ | |
45 | #define CCR_PM 0x4c /* w Power Management */ | |
46 | #define CCR_INTC 0x50 /* b INT Control */ | |
47 | #define CCR_LMW1L 0x54 /* w Local Memory Window 1 LMADRS Low */ | |
48 | #define CCR_LMW1H 0x56 /* w Local Memory Window 1 LMADRS High */ | |
49 | #define CCR_LMW1BL 0x58 /* w Local Memory Window 1 Base Address Low */ | |
50 | #define CCR_LMW1BH 0x5A /* w Local Memory Window 1 Base Address High */ | |
51 | #define CCR_LMW2L 0x5C /* w Local Memory Window 2 LMADRS Low */ | |
52 | #define CCR_LMW2H 0x5E /* w Local Memory Window 2 LMADRS High */ | |
53 | #define CCR_LMW2BL 0x60 /* w Local Memory Window 2 Base Address Low */ | |
54 | #define CCR_LMW2BH 0x62 /* w Local Memory Window 2 Base Address High */ | |
55 | #define CCR_MISC 0xFC /* b MISC */ | |
56 | ||
57 | #define CCR_PM_GKEN 0x0001 | |
58 | #define CCR_PM_CKRNEN 0x0002 | |
59 | #define CCR_PM_USBPW1 0x0004 | |
60 | #define CCR_PM_USBPW2 0x0008 | |
61 | #define CCR_PM_USBPW3 0x0008 | |
62 | #define CCR_PM_PMEE 0x0100 | |
63 | #define CCR_PM_PMES 0x8000 | |
64 | ||
65 | /*-------------------------------------------------------------------------*/ | |
66 | ||
67 | struct tmio_hcd { | |
68 | void __iomem *ccr; | |
69 | spinlock_t lock; /* protects RMW cycles */ | |
70 | }; | |
71 | ||
72 | #define hcd_to_tmio(hcd) ((struct tmio_hcd *)(hcd_to_ohci(hcd) + 1)) | |
73 | ||
74 | /*-------------------------------------------------------------------------*/ | |
75 | ||
76 | static void tmio_write_pm(struct platform_device *dev) | |
77 | { | |
78 | struct usb_hcd *hcd = platform_get_drvdata(dev); | |
79 | struct tmio_hcd *tmio = hcd_to_tmio(hcd); | |
80 | u16 pm; | |
81 | unsigned long flags; | |
82 | ||
83 | spin_lock_irqsave(&tmio->lock, flags); | |
84 | ||
85 | pm = CCR_PM_GKEN | CCR_PM_CKRNEN | | |
86 | CCR_PM_PMEE | CCR_PM_PMES; | |
87 | ||
88 | tmio_iowrite16(pm, tmio->ccr + CCR_PM); | |
89 | spin_unlock_irqrestore(&tmio->lock, flags); | |
90 | } | |
91 | ||
92 | static void tmio_stop_hc(struct platform_device *dev) | |
93 | { | |
94 | struct usb_hcd *hcd = platform_get_drvdata(dev); | |
95 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); | |
96 | struct tmio_hcd *tmio = hcd_to_tmio(hcd); | |
97 | u16 pm; | |
98 | ||
99 | pm = CCR_PM_GKEN | CCR_PM_CKRNEN; | |
100 | switch (ohci->num_ports) { | |
101 | default: | |
102 | dev_err(&dev->dev, "Unsupported amount of ports: %d\n", ohci->num_ports); | |
103 | case 3: | |
104 | pm |= CCR_PM_USBPW3; | |
105 | case 2: | |
106 | pm |= CCR_PM_USBPW2; | |
107 | case 1: | |
108 | pm |= CCR_PM_USBPW1; | |
109 | } | |
110 | tmio_iowrite8(0, tmio->ccr + CCR_INTC); | |
111 | tmio_iowrite8(0, tmio->ccr + CCR_ILME); | |
112 | tmio_iowrite16(0, tmio->ccr + CCR_BASE); | |
113 | tmio_iowrite16(0, tmio->ccr + CCR_BASE + 2); | |
114 | tmio_iowrite16(pm, tmio->ccr + CCR_PM); | |
115 | } | |
116 | ||
117 | static void tmio_start_hc(struct platform_device *dev) | |
118 | { | |
119 | struct usb_hcd *hcd = platform_get_drvdata(dev); | |
120 | struct tmio_hcd *tmio = hcd_to_tmio(hcd); | |
121 | unsigned long base = hcd->rsrc_start; | |
122 | ||
123 | tmio_write_pm(dev); | |
124 | tmio_iowrite16(base, tmio->ccr + CCR_BASE); | |
125 | tmio_iowrite16(base >> 16, tmio->ccr + CCR_BASE + 2); | |
126 | tmio_iowrite8(1, tmio->ccr + CCR_ILME); | |
127 | tmio_iowrite8(2, tmio->ccr + CCR_INTC); | |
128 | ||
129 | dev_info(&dev->dev, "revision %d @ 0x%08llx, irq %d\n", | |
8e8de5ab FB |
130 | tmio_ioread8(tmio->ccr + CCR_REVID), |
131 | (u64) hcd->rsrc_start, hcd->irq); | |
78c73414 DB |
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) { | |
3b8ca26f GKH |
143 | dev_err(hcd->self.controller, "can't start %s\n", |
144 | hcd->self.bus_name); | |
78c73414 DB |
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 | ||
41ac7b3a | 187 | static int ohci_hcd_tmio_drv_probe(struct platform_device *dev) |
78c73414 | 188 | { |
944dc035 | 189 | const struct mfd_cell *cell = mfd_get_cell(dev); |
78c73414 DB |
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 | ||
427c4f33 | 205 | hcd = usb_create_hcd(&ohci_tmio_hc_driver, &dev->dev, dev_name(&dev->dev)); |
78c73414 DB |
206 | if (!hcd) { |
207 | ret = -ENOMEM; | |
208 | goto err_usb_create_hcd; | |
209 | } | |
210 | ||
211 | hcd->rsrc_start = regs->start; | |
28f65c11 | 212 | hcd->rsrc_len = resource_size(regs); |
78c73414 DB |
213 | |
214 | tmio = hcd_to_tmio(hcd); | |
215 | ||
216 | spin_lock_init(&tmio->lock); | |
217 | ||
28f65c11 | 218 | tmio->ccr = ioremap(config->start, resource_size(config)); |
78c73414 DB |
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, | |
28f65c11 | 232 | resource_size(sram), |
78c73414 DB |
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 | ||
b5dd18d8 | 248 | ret = usb_add_hcd(hcd, irq, 0); |
78c73414 DB |
249 | if (ret) |
250 | goto err_add_hcd; | |
251 | ||
3c9740a1 | 252 | device_wakeup_enable(hcd->self.controller); |
78c73414 DB |
253 | if (ret == 0) |
254 | return ret; | |
255 | ||
256 | usb_remove_hcd(hcd); | |
257 | ||
258 | err_add_hcd: | |
259 | tmio_stop_hc(dev); | |
260 | if (cell->disable) | |
261 | cell->disable(dev); | |
262 | err_enable: | |
263 | dma_release_declared_memory(&dev->dev); | |
264 | err_dma_declare: | |
265 | iounmap(hcd->regs); | |
266 | err_ioremap_regs: | |
267 | iounmap(tmio->ccr); | |
268 | err_ioremap_ccr: | |
269 | usb_put_hcd(hcd); | |
270 | err_usb_create_hcd: | |
271 | ||
272 | return ret; | |
273 | } | |
274 | ||
fb4e98ab | 275 | static int ohci_hcd_tmio_drv_remove(struct platform_device *dev) |
78c73414 DB |
276 | { |
277 | struct usb_hcd *hcd = platform_get_drvdata(dev); | |
278 | struct tmio_hcd *tmio = hcd_to_tmio(hcd); | |
944dc035 | 279 | const struct mfd_cell *cell = mfd_get_cell(dev); |
78c73414 DB |
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 | ||
78c73414 DB |
290 | return 0; |
291 | } | |
292 | ||
293 | #ifdef CONFIG_PM | |
294 | static int ohci_hcd_tmio_drv_suspend(struct platform_device *dev, pm_message_t state) | |
295 | { | |
944dc035 | 296 | const struct mfd_cell *cell = mfd_get_cell(dev); |
78c73414 DB |
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; /* USSUSP */ | |
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 | } | |
78c73414 DB |
321 | return 0; |
322 | } | |
323 | ||
324 | static int ohci_hcd_tmio_drv_resume(struct platform_device *dev) | |
325 | { | |
944dc035 | 326 | const struct mfd_cell *cell = mfd_get_cell(dev); |
78c73414 DB |
327 | struct usb_hcd *hcd = platform_get_drvdata(dev); |
328 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); | |
329 | struct tmio_hcd *tmio = hcd_to_tmio(hcd); | |
330 | unsigned long flags; | |
331 | u8 misc; | |
332 | int ret; | |
333 | ||
334 | if (time_before(jiffies, ohci->next_statechange)) | |
335 | msleep(5); | |
336 | ohci->next_statechange = jiffies; | |
337 | ||
338 | if (cell->resume) { | |
339 | ret = cell->resume(dev); | |
340 | if (ret) | |
341 | return ret; | |
342 | } | |
343 | ||
344 | tmio_start_hc(dev); | |
345 | ||
346 | spin_lock_irqsave(&tmio->lock, flags); | |
347 | ||
348 | misc = tmio_ioread8(tmio->ccr + CCR_MISC); | |
349 | misc &= ~(1 << 3); /* USSUSP */ | |
350 | tmio_iowrite8(misc, tmio->ccr + CCR_MISC); | |
351 | ||
352 | spin_unlock_irqrestore(&tmio->lock, flags); | |
353 | ||
cfa49b4b | 354 | ohci_resume(hcd, false); |
78c73414 DB |
355 | |
356 | return 0; | |
357 | } | |
358 | #else | |
359 | #define ohci_hcd_tmio_drv_suspend NULL | |
360 | #define ohci_hcd_tmio_drv_resume NULL | |
361 | #endif | |
362 | ||
363 | static struct platform_driver ohci_hcd_tmio_driver = { | |
364 | .probe = ohci_hcd_tmio_drv_probe, | |
7690417d | 365 | .remove = ohci_hcd_tmio_drv_remove, |
78c73414 DB |
366 | .shutdown = usb_hcd_platform_shutdown, |
367 | .suspend = ohci_hcd_tmio_drv_suspend, | |
368 | .resume = ohci_hcd_tmio_drv_resume, | |
369 | .driver = { | |
370 | .name = "tmio-ohci", | |
78c73414 DB |
371 | }, |
372 | }; |