Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 pxa27x | |
9 | * | |
10 | * Written by Christopher Hoover <ch@hpl.hp.com> | |
11 | * Based on fragments of previous driver by Russell King et al. | |
12 | * | |
13 | * Modified for LH7A404 from ohci-sa1111.c | |
14 | * by Durgesh Pattamatta <pattamattad@sharpsec.com> | |
15 | * | |
16 | * Modified for pxa27x from ohci-lh7a404.c | |
17 | * by Nick Bane <nick@cecomputing.co.uk> 26-8-2004 | |
18 | * | |
19 | * This file is licenced under the GPL. | |
20 | */ | |
21 | ||
22 | #include <linux/device.h> | |
4e57b681 | 23 | #include <linux/signal.h> |
d052d1be | 24 | #include <linux/platform_device.h> |
a8bcf410 | 25 | #include <linux/clk.h> |
4fd5f826 | 26 | |
1da177e4 LT |
27 | #include <asm/mach-types.h> |
28 | #include <asm/hardware.h> | |
29 | #include <asm/arch/pxa-regs.h> | |
81f280e2 | 30 | #include <asm/arch/ohci.h> |
1da177e4 LT |
31 | |
32 | #define PXA_UHC_MAX_PORTNUM 3 | |
33 | ||
34 | #define UHCRHPS(x) __REG2( 0x4C000050, (x)<<2 ) | |
35 | ||
a8bcf410 | 36 | static struct clk *usb_clk; |
37 | ||
1da177e4 LT |
38 | /* |
39 | PMM_NPS_MODE -- PMM Non-power switching mode | |
40 | Ports are powered continuously. | |
41 | ||
42 | PMM_GLOBAL_MODE -- PMM global switching mode | |
43 | All ports are powered at the same time. | |
44 | ||
45 | PMM_PERPORT_MODE -- PMM per port switching mode | |
46 | Ports are powered individually. | |
47 | */ | |
48 | static int pxa27x_ohci_select_pmm( int mode ) | |
49 | { | |
1da177e4 LT |
50 | switch ( mode ) { |
51 | case PMM_NPS_MODE: | |
52 | UHCRHDA |= RH_A_NPS; | |
dd9048af | 53 | break; |
1da177e4 LT |
54 | case PMM_GLOBAL_MODE: |
55 | UHCRHDA &= ~(RH_A_NPS & RH_A_PSM); | |
56 | break; | |
57 | case PMM_PERPORT_MODE: | |
58 | UHCRHDA &= ~(RH_A_NPS); | |
59 | UHCRHDA |= RH_A_PSM; | |
60 | ||
61 | /* Set port power control mask bits, only 3 ports. */ | |
62 | UHCRHDB |= (0x7<<17); | |
63 | break; | |
64 | default: | |
65 | printk( KERN_ERR | |
dd9048af | 66 | "Invalid mode %d, set to non-power switch mode.\n", |
1da177e4 LT |
67 | mode ); |
68 | ||
1da177e4 LT |
69 | UHCRHDA |= RH_A_NPS; |
70 | } | |
71 | ||
72 | return 0; | |
73 | } | |
74 | ||
1da177e4 LT |
75 | extern int usb_disabled(void); |
76 | ||
77 | /*-------------------------------------------------------------------------*/ | |
78 | ||
81f280e2 | 79 | static int pxa27x_start_hc(struct device *dev) |
1da177e4 | 80 | { |
81f280e2 RP |
81 | int retval = 0; |
82 | struct pxaohci_platform_data *inf; | |
83 | ||
84 | inf = dev->platform_data; | |
85 | ||
a8bcf410 | 86 | clk_enable(usb_clk); |
1da177e4 LT |
87 | |
88 | UHCHR |= UHCHR_FHR; | |
89 | udelay(11); | |
90 | UHCHR &= ~UHCHR_FHR; | |
91 | ||
92 | UHCHR |= UHCHR_FSBIR; | |
93 | while (UHCHR & UHCHR_FSBIR) | |
94 | cpu_relax(); | |
95 | ||
81f280e2 RP |
96 | if (inf->init) |
97 | retval = inf->init(dev); | |
155faf5e | 98 | |
81f280e2 RP |
99 | if (retval < 0) |
100 | return retval; | |
1da177e4 LT |
101 | |
102 | UHCHR &= ~UHCHR_SSE; | |
103 | ||
104 | UHCHIE = (UHCHIE_UPRIE | UHCHIE_RWIE); | |
155faf5e DB |
105 | |
106 | /* Clear any OTG Pin Hold */ | |
107 | if (PSSR & PSSR_OTGPH) | |
108 | PSSR |= PSSR_OTGPH; | |
81f280e2 RP |
109 | |
110 | return 0; | |
1da177e4 LT |
111 | } |
112 | ||
81f280e2 | 113 | static void pxa27x_stop_hc(struct device *dev) |
1da177e4 | 114 | { |
81f280e2 RP |
115 | struct pxaohci_platform_data *inf; |
116 | ||
117 | inf = dev->platform_data; | |
118 | ||
119 | if (inf->exit) | |
120 | inf->exit(dev); | |
121 | ||
1da177e4 LT |
122 | UHCHR |= UHCHR_FHR; |
123 | udelay(11); | |
124 | UHCHR &= ~UHCHR_FHR; | |
125 | ||
126 | UHCCOMS |= 1; | |
127 | udelay(10); | |
128 | ||
a8bcf410 | 129 | clk_disable(usb_clk); |
1da177e4 LT |
130 | } |
131 | ||
132 | ||
133 | /*-------------------------------------------------------------------------*/ | |
134 | ||
135 | /* configure so an HC device and id are always provided */ | |
136 | /* always called with process context; sleeping is OK */ | |
137 | ||
138 | ||
139 | /** | |
140 | * usb_hcd_pxa27x_probe - initialize pxa27x-based HCDs | |
141 | * Context: !in_interrupt() | |
142 | * | |
143 | * Allocates basic resources for this USB host controller, and | |
144 | * then invokes the start() method for the HCD associated with it | |
145 | * through the hotplug entry's driver_data. | |
146 | * | |
147 | */ | |
81f280e2 | 148 | int usb_hcd_pxa27x_probe (const struct hc_driver *driver, struct platform_device *pdev) |
1da177e4 LT |
149 | { |
150 | int retval; | |
151 | struct usb_hcd *hcd; | |
81f280e2 RP |
152 | struct pxaohci_platform_data *inf; |
153 | ||
154 | inf = pdev->dev.platform_data; | |
1da177e4 | 155 | |
81f280e2 RP |
156 | if (!inf) |
157 | return -ENODEV; | |
158 | ||
159 | if (pdev->resource[1].flags != IORESOURCE_IRQ) { | |
1da177e4 LT |
160 | pr_debug ("resource[1] is not IORESOURCE_IRQ"); |
161 | return -ENOMEM; | |
162 | } | |
163 | ||
a8bcf410 | 164 | usb_clk = clk_get(&pdev->dev, "USBCLK"); |
165 | if (IS_ERR(usb_clk)) | |
166 | return PTR_ERR(usb_clk); | |
167 | ||
81f280e2 | 168 | hcd = usb_create_hcd (driver, &pdev->dev, "pxa27x"); |
1da177e4 LT |
169 | if (!hcd) |
170 | return -ENOMEM; | |
81f280e2 RP |
171 | hcd->rsrc_start = pdev->resource[0].start; |
172 | hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1; | |
1da177e4 LT |
173 | |
174 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { | |
175 | pr_debug("request_mem_region failed"); | |
176 | retval = -EBUSY; | |
177 | goto err1; | |
178 | } | |
179 | ||
180 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); | |
181 | if (!hcd->regs) { | |
182 | pr_debug("ioremap failed"); | |
183 | retval = -ENOMEM; | |
184 | goto err2; | |
185 | } | |
186 | ||
81f280e2 RP |
187 | if ((retval = pxa27x_start_hc(&pdev->dev)) < 0) { |
188 | pr_debug("pxa27x_start_hc failed"); | |
189 | goto err3; | |
190 | } | |
1da177e4 LT |
191 | |
192 | /* Select Power Management Mode */ | |
81f280e2 | 193 | pxa27x_ohci_select_pmm(inf->port_mode); |
1da177e4 | 194 | |
0c27c5d5 RP |
195 | if (inf->power_budget) |
196 | hcd->power_budget = inf->power_budget; | |
197 | ||
1da177e4 LT |
198 | ohci_hcd_init(hcd_to_ohci(hcd)); |
199 | ||
d54b5caa | 200 | retval = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_DISABLED); |
1da177e4 LT |
201 | if (retval == 0) |
202 | return retval; | |
203 | ||
81f280e2 RP |
204 | pxa27x_stop_hc(&pdev->dev); |
205 | err3: | |
1da177e4 LT |
206 | iounmap(hcd->regs); |
207 | err2: | |
208 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
209 | err1: | |
210 | usb_put_hcd(hcd); | |
a8bcf410 | 211 | clk_put(usb_clk); |
1da177e4 LT |
212 | return retval; |
213 | } | |
214 | ||
215 | ||
216 | /* may be called without controller electrically present */ | |
217 | /* may be called with controller, bus, and devices active */ | |
218 | ||
219 | /** | |
220 | * usb_hcd_pxa27x_remove - shutdown processing for pxa27x-based HCDs | |
221 | * @dev: USB Host Controller being removed | |
222 | * Context: !in_interrupt() | |
223 | * | |
224 | * Reverses the effect of usb_hcd_pxa27x_probe(), first invoking | |
225 | * the HCD's stop() method. It is always called from a thread | |
226 | * context, normally "rmmod", "apmd", or something similar. | |
227 | * | |
228 | */ | |
81f280e2 | 229 | void usb_hcd_pxa27x_remove (struct usb_hcd *hcd, struct platform_device *pdev) |
1da177e4 LT |
230 | { |
231 | usb_remove_hcd(hcd); | |
81f280e2 | 232 | pxa27x_stop_hc(&pdev->dev); |
1da177e4 LT |
233 | iounmap(hcd->regs); |
234 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
235 | usb_put_hcd(hcd); | |
a8bcf410 | 236 | clk_put(usb_clk); |
1da177e4 LT |
237 | } |
238 | ||
239 | /*-------------------------------------------------------------------------*/ | |
240 | ||
241 | static int __devinit | |
242 | ohci_pxa27x_start (struct usb_hcd *hcd) | |
243 | { | |
244 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
245 | int ret; | |
246 | ||
247 | ohci_dbg (ohci, "ohci_pxa27x_start, ohci:%p", ohci); | |
248 | ||
fdd13b36 DB |
249 | /* The value of NDP in roothub_a is incorrect on this hardware */ |
250 | ohci->num_ports = 3; | |
251 | ||
1da177e4 LT |
252 | if ((ret = ohci_init(ohci)) < 0) |
253 | return ret; | |
254 | ||
255 | if ((ret = ohci_run (ohci)) < 0) { | |
256 | err ("can't start %s", hcd->self.bus_name); | |
257 | ohci_stop (hcd); | |
258 | return ret; | |
259 | } | |
260 | ||
261 | return 0; | |
262 | } | |
263 | ||
264 | /*-------------------------------------------------------------------------*/ | |
265 | ||
266 | static const struct hc_driver ohci_pxa27x_hc_driver = { | |
267 | .description = hcd_name, | |
268 | .product_desc = "PXA27x OHCI", | |
269 | .hcd_priv_size = sizeof(struct ohci_hcd), | |
270 | ||
271 | /* | |
272 | * generic hardware linkage | |
273 | */ | |
274 | .irq = ohci_irq, | |
275 | .flags = HCD_USB11 | HCD_MEMORY, | |
276 | ||
277 | /* | |
278 | * basic lifecycle operations | |
279 | */ | |
280 | .start = ohci_pxa27x_start, | |
281 | .stop = ohci_stop, | |
dd9048af | 282 | .shutdown = ohci_shutdown, |
1da177e4 LT |
283 | |
284 | /* | |
285 | * managing i/o requests and associated device resources | |
286 | */ | |
287 | .urb_enqueue = ohci_urb_enqueue, | |
288 | .urb_dequeue = ohci_urb_dequeue, | |
289 | .endpoint_disable = ohci_endpoint_disable, | |
290 | ||
291 | /* | |
292 | * scheduling support | |
293 | */ | |
294 | .get_frame_number = ohci_get_frame, | |
295 | ||
296 | /* | |
297 | * root hub support | |
298 | */ | |
299 | .hub_status_data = ohci_hub_status_data, | |
300 | .hub_control = ohci_hub_control, | |
09ca8adb | 301 | .hub_irq_enable = ohci_rhsc_enable, |
8ad7fe16 | 302 | #ifdef CONFIG_PM |
0c0382e3 AS |
303 | .bus_suspend = ohci_bus_suspend, |
304 | .bus_resume = ohci_bus_resume, | |
1da177e4 | 305 | #endif |
9293677a | 306 | .start_port_reset = ohci_start_port_reset, |
1da177e4 LT |
307 | }; |
308 | ||
309 | /*-------------------------------------------------------------------------*/ | |
310 | ||
3ae5eaec | 311 | static int ohci_hcd_pxa27x_drv_probe(struct platform_device *pdev) |
1da177e4 | 312 | { |
1da177e4 LT |
313 | pr_debug ("In ohci_hcd_pxa27x_drv_probe"); |
314 | ||
315 | if (usb_disabled()) | |
316 | return -ENODEV; | |
317 | ||
81f280e2 | 318 | return usb_hcd_pxa27x_probe(&ohci_pxa27x_hc_driver, pdev); |
1da177e4 LT |
319 | } |
320 | ||
3ae5eaec | 321 | static int ohci_hcd_pxa27x_drv_remove(struct platform_device *pdev) |
1da177e4 | 322 | { |
3ae5eaec | 323 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
1da177e4 LT |
324 | |
325 | usb_hcd_pxa27x_remove(hcd, pdev); | |
a5e36d20 | 326 | platform_set_drvdata(pdev, NULL); |
1da177e4 LT |
327 | return 0; |
328 | } | |
329 | ||
2e1dcc16 RP |
330 | #ifdef CONFIG_PM |
331 | static int ohci_hcd_pxa27x_drv_suspend(struct platform_device *pdev, pm_message_t state) | |
1da177e4 | 332 | { |
a5e36d20 RP |
333 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
334 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); | |
2e1dcc16 RP |
335 | |
336 | if (time_before(jiffies, ohci->next_statechange)) | |
337 | msleep(5); | |
338 | ohci->next_statechange = jiffies; | |
339 | ||
340 | pxa27x_stop_hc(&pdev->dev); | |
a5e36d20 | 341 | hcd->state = HC_STATE_SUSPENDED; |
1da177e4 LT |
342 | |
343 | return 0; | |
344 | } | |
345 | ||
2e1dcc16 | 346 | static int ohci_hcd_pxa27x_drv_resume(struct platform_device *pdev) |
1da177e4 | 347 | { |
a5e36d20 RP |
348 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
349 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); | |
2e1dcc16 RP |
350 | int status; |
351 | ||
352 | if (time_before(jiffies, ohci->next_statechange)) | |
353 | msleep(5); | |
354 | ohci->next_statechange = jiffies; | |
355 | ||
356 | if ((status = pxa27x_start_hc(&pdev->dev)) < 0) | |
357 | return status; | |
358 | ||
43bbb7e0 | 359 | ohci_finish_controller_resume(hcd); |
1da177e4 LT |
360 | return 0; |
361 | } | |
2e1dcc16 | 362 | #endif |
1da177e4 | 363 | |
f4fce61d KS |
364 | /* work with hotplug and coldplug */ |
365 | MODULE_ALIAS("platform:pxa27x-ohci"); | |
1da177e4 | 366 | |
3ae5eaec | 367 | static struct platform_driver ohci_hcd_pxa27x_driver = { |
1da177e4 LT |
368 | .probe = ohci_hcd_pxa27x_drv_probe, |
369 | .remove = ohci_hcd_pxa27x_drv_remove, | |
dd9048af | 370 | .shutdown = usb_hcd_platform_shutdown, |
2e1dcc16 | 371 | #ifdef CONFIG_PM |
dd9048af | 372 | .suspend = ohci_hcd_pxa27x_drv_suspend, |
3ae5eaec | 373 | .resume = ohci_hcd_pxa27x_drv_resume, |
2e1dcc16 | 374 | #endif |
3ae5eaec RK |
375 | .driver = { |
376 | .name = "pxa27x-ohci", | |
f4fce61d | 377 | .owner = THIS_MODULE, |
3ae5eaec | 378 | }, |
1da177e4 LT |
379 | }; |
380 |