Commit | Line | Data |
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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> |
1da177e4 LT |
24 | #include <asm/mach-types.h> |
25 | #include <asm/hardware.h> | |
26 | #include <asm/arch/pxa-regs.h> | |
27 | ||
28 | ||
29 | #define PMM_NPS_MODE 1 | |
30 | #define PMM_GLOBAL_MODE 2 | |
31 | #define PMM_PERPORT_MODE 3 | |
32 | ||
33 | #define PXA_UHC_MAX_PORTNUM 3 | |
34 | ||
35 | #define UHCRHPS(x) __REG2( 0x4C000050, (x)<<2 ) | |
36 | ||
37 | static int pxa27x_ohci_pmm_state; | |
38 | ||
39 | /* | |
40 | PMM_NPS_MODE -- PMM Non-power switching mode | |
41 | Ports are powered continuously. | |
42 | ||
43 | PMM_GLOBAL_MODE -- PMM global switching mode | |
44 | All ports are powered at the same time. | |
45 | ||
46 | PMM_PERPORT_MODE -- PMM per port switching mode | |
47 | Ports are powered individually. | |
48 | */ | |
49 | static int pxa27x_ohci_select_pmm( int mode ) | |
50 | { | |
51 | pxa27x_ohci_pmm_state = mode; | |
52 | ||
53 | switch ( mode ) { | |
54 | case PMM_NPS_MODE: | |
55 | UHCRHDA |= RH_A_NPS; | |
56 | break; | |
57 | case PMM_GLOBAL_MODE: | |
58 | UHCRHDA &= ~(RH_A_NPS & RH_A_PSM); | |
59 | break; | |
60 | case PMM_PERPORT_MODE: | |
61 | UHCRHDA &= ~(RH_A_NPS); | |
62 | UHCRHDA |= RH_A_PSM; | |
63 | ||
64 | /* Set port power control mask bits, only 3 ports. */ | |
65 | UHCRHDB |= (0x7<<17); | |
66 | break; | |
67 | default: | |
68 | printk( KERN_ERR | |
69 | "Invalid mode %d, set to non-power switch mode.\n", | |
70 | mode ); | |
71 | ||
72 | pxa27x_ohci_pmm_state = PMM_NPS_MODE; | |
73 | UHCRHDA |= RH_A_NPS; | |
74 | } | |
75 | ||
76 | return 0; | |
77 | } | |
78 | ||
1da177e4 LT |
79 | extern int usb_disabled(void); |
80 | ||
81 | /*-------------------------------------------------------------------------*/ | |
82 | ||
83 | static void pxa27x_start_hc(struct platform_device *dev) | |
84 | { | |
85 | pxa_set_cken(CKEN10_USBHOST, 1); | |
86 | ||
87 | UHCHR |= UHCHR_FHR; | |
88 | udelay(11); | |
89 | UHCHR &= ~UHCHR_FHR; | |
90 | ||
91 | UHCHR |= UHCHR_FSBIR; | |
92 | while (UHCHR & UHCHR_FSBIR) | |
93 | cpu_relax(); | |
94 | ||
95 | /* This could be properly abstracted away through the | |
96 | device data the day more machines are supported and | |
97 | their differences can be figured out correctly. */ | |
98 | if (machine_is_mainstone()) { | |
99 | /* setup Port1 GPIO pin. */ | |
100 | pxa_gpio_mode( 88 | GPIO_ALT_FN_1_IN); /* USBHPWR1 */ | |
101 | pxa_gpio_mode( 89 | GPIO_ALT_FN_2_OUT); /* USBHPEN1 */ | |
102 | ||
103 | /* Set the Power Control Polarity Low and Power Sense | |
104 | Polarity Low to active low. Supply power to USB ports. */ | |
105 | UHCHR = (UHCHR | UHCHR_PCPL | UHCHR_PSPL) & | |
106 | ~(UHCHR_SSEP1 | UHCHR_SSEP2 | UHCHR_SSEP3 | UHCHR_SSE); | |
155faf5e DB |
107 | |
108 | pxa27x_ohci_pmm_state = PMM_PERPORT_MODE; | |
1da177e4 LT |
109 | } |
110 | ||
111 | UHCHR &= ~UHCHR_SSE; | |
112 | ||
113 | UHCHIE = (UHCHIE_UPRIE | UHCHIE_RWIE); | |
155faf5e DB |
114 | |
115 | /* Clear any OTG Pin Hold */ | |
116 | if (PSSR & PSSR_OTGPH) | |
117 | PSSR |= PSSR_OTGPH; | |
1da177e4 LT |
118 | } |
119 | ||
120 | static void pxa27x_stop_hc(struct platform_device *dev) | |
121 | { | |
122 | UHCHR |= UHCHR_FHR; | |
123 | udelay(11); | |
124 | UHCHR &= ~UHCHR_FHR; | |
125 | ||
126 | UHCCOMS |= 1; | |
127 | udelay(10); | |
128 | ||
129 | pxa_set_cken(CKEN10_USBHOST, 0); | |
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 | */ | |
148 | int usb_hcd_pxa27x_probe (const struct hc_driver *driver, | |
149 | struct platform_device *dev) | |
150 | { | |
151 | int retval; | |
152 | struct usb_hcd *hcd; | |
153 | ||
154 | if (dev->resource[1].flags != IORESOURCE_IRQ) { | |
155 | pr_debug ("resource[1] is not IORESOURCE_IRQ"); | |
156 | return -ENOMEM; | |
157 | } | |
158 | ||
159 | hcd = usb_create_hcd (driver, &dev->dev, "pxa27x"); | |
160 | if (!hcd) | |
161 | return -ENOMEM; | |
162 | hcd->rsrc_start = dev->resource[0].start; | |
163 | hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1; | |
164 | ||
165 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { | |
166 | pr_debug("request_mem_region failed"); | |
167 | retval = -EBUSY; | |
168 | goto err1; | |
169 | } | |
170 | ||
171 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); | |
172 | if (!hcd->regs) { | |
173 | pr_debug("ioremap failed"); | |
174 | retval = -ENOMEM; | |
175 | goto err2; | |
176 | } | |
177 | ||
178 | pxa27x_start_hc(dev); | |
179 | ||
180 | /* Select Power Management Mode */ | |
155faf5e | 181 | pxa27x_ohci_select_pmm(pxa27x_ohci_pmm_state); |
1da177e4 LT |
182 | |
183 | ohci_hcd_init(hcd_to_ohci(hcd)); | |
184 | ||
185 | retval = usb_add_hcd(hcd, dev->resource[1].start, SA_INTERRUPT); | |
186 | if (retval == 0) | |
187 | return retval; | |
188 | ||
189 | pxa27x_stop_hc(dev); | |
190 | iounmap(hcd->regs); | |
191 | err2: | |
192 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
193 | err1: | |
194 | usb_put_hcd(hcd); | |
195 | return retval; | |
196 | } | |
197 | ||
198 | ||
199 | /* may be called without controller electrically present */ | |
200 | /* may be called with controller, bus, and devices active */ | |
201 | ||
202 | /** | |
203 | * usb_hcd_pxa27x_remove - shutdown processing for pxa27x-based HCDs | |
204 | * @dev: USB Host Controller being removed | |
205 | * Context: !in_interrupt() | |
206 | * | |
207 | * Reverses the effect of usb_hcd_pxa27x_probe(), first invoking | |
208 | * the HCD's stop() method. It is always called from a thread | |
209 | * context, normally "rmmod", "apmd", or something similar. | |
210 | * | |
211 | */ | |
212 | void usb_hcd_pxa27x_remove (struct usb_hcd *hcd, struct platform_device *dev) | |
213 | { | |
214 | usb_remove_hcd(hcd); | |
215 | pxa27x_stop_hc(dev); | |
216 | iounmap(hcd->regs); | |
217 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
218 | usb_put_hcd(hcd); | |
219 | } | |
220 | ||
221 | /*-------------------------------------------------------------------------*/ | |
222 | ||
223 | static int __devinit | |
224 | ohci_pxa27x_start (struct usb_hcd *hcd) | |
225 | { | |
226 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
227 | int ret; | |
228 | ||
229 | ohci_dbg (ohci, "ohci_pxa27x_start, ohci:%p", ohci); | |
230 | ||
fdd13b36 DB |
231 | /* The value of NDP in roothub_a is incorrect on this hardware */ |
232 | ohci->num_ports = 3; | |
233 | ||
1da177e4 LT |
234 | if ((ret = ohci_init(ohci)) < 0) |
235 | return ret; | |
236 | ||
237 | if ((ret = ohci_run (ohci)) < 0) { | |
238 | err ("can't start %s", hcd->self.bus_name); | |
239 | ohci_stop (hcd); | |
240 | return ret; | |
241 | } | |
242 | ||
243 | return 0; | |
244 | } | |
245 | ||
246 | /*-------------------------------------------------------------------------*/ | |
247 | ||
248 | static const struct hc_driver ohci_pxa27x_hc_driver = { | |
249 | .description = hcd_name, | |
250 | .product_desc = "PXA27x OHCI", | |
251 | .hcd_priv_size = sizeof(struct ohci_hcd), | |
252 | ||
253 | /* | |
254 | * generic hardware linkage | |
255 | */ | |
256 | .irq = ohci_irq, | |
257 | .flags = HCD_USB11 | HCD_MEMORY, | |
258 | ||
259 | /* | |
260 | * basic lifecycle operations | |
261 | */ | |
262 | .start = ohci_pxa27x_start, | |
263 | .stop = ohci_stop, | |
264 | ||
265 | /* | |
266 | * managing i/o requests and associated device resources | |
267 | */ | |
268 | .urb_enqueue = ohci_urb_enqueue, | |
269 | .urb_dequeue = ohci_urb_dequeue, | |
270 | .endpoint_disable = ohci_endpoint_disable, | |
271 | ||
272 | /* | |
273 | * scheduling support | |
274 | */ | |
275 | .get_frame_number = ohci_get_frame, | |
276 | ||
277 | /* | |
278 | * root hub support | |
279 | */ | |
280 | .hub_status_data = ohci_hub_status_data, | |
281 | .hub_control = ohci_hub_control, | |
8ad7fe16 | 282 | #ifdef CONFIG_PM |
0c0382e3 AS |
283 | .bus_suspend = ohci_bus_suspend, |
284 | .bus_resume = ohci_bus_resume, | |
1da177e4 | 285 | #endif |
9293677a | 286 | .start_port_reset = ohci_start_port_reset, |
1da177e4 LT |
287 | }; |
288 | ||
289 | /*-------------------------------------------------------------------------*/ | |
290 | ||
291 | static int ohci_hcd_pxa27x_drv_probe(struct device *dev) | |
292 | { | |
293 | struct platform_device *pdev = to_platform_device(dev); | |
294 | int ret; | |
295 | ||
296 | pr_debug ("In ohci_hcd_pxa27x_drv_probe"); | |
297 | ||
298 | if (usb_disabled()) | |
299 | return -ENODEV; | |
300 | ||
301 | ret = usb_hcd_pxa27x_probe(&ohci_pxa27x_hc_driver, pdev); | |
302 | return ret; | |
303 | } | |
304 | ||
305 | static int ohci_hcd_pxa27x_drv_remove(struct device *dev) | |
306 | { | |
307 | struct platform_device *pdev = to_platform_device(dev); | |
308 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
309 | ||
310 | usb_hcd_pxa27x_remove(hcd, pdev); | |
311 | return 0; | |
312 | } | |
313 | ||
9480e307 | 314 | static int ohci_hcd_pxa27x_drv_suspend(struct device *dev, pm_message_t state) |
1da177e4 LT |
315 | { |
316 | // struct platform_device *pdev = to_platform_device(dev); | |
317 | // struct usb_hcd *hcd = dev_get_drvdata(dev); | |
318 | printk("%s: not implemented yet\n", __FUNCTION__); | |
319 | ||
320 | return 0; | |
321 | } | |
322 | ||
9480e307 | 323 | static int ohci_hcd_pxa27x_drv_resume(struct device *dev) |
1da177e4 LT |
324 | { |
325 | // struct platform_device *pdev = to_platform_device(dev); | |
326 | // struct usb_hcd *hcd = dev_get_drvdata(dev); | |
327 | printk("%s: not implemented yet\n", __FUNCTION__); | |
328 | ||
329 | return 0; | |
330 | } | |
331 | ||
332 | ||
333 | static struct device_driver ohci_hcd_pxa27x_driver = { | |
334 | .name = "pxa27x-ohci", | |
335 | .bus = &platform_bus_type, | |
336 | .probe = ohci_hcd_pxa27x_drv_probe, | |
337 | .remove = ohci_hcd_pxa27x_drv_remove, | |
338 | .suspend = ohci_hcd_pxa27x_drv_suspend, | |
339 | .resume = ohci_hcd_pxa27x_drv_resume, | |
340 | }; | |
341 | ||
342 | static int __init ohci_hcd_pxa27x_init (void) | |
343 | { | |
344 | pr_debug (DRIVER_INFO " (pxa27x)"); | |
345 | pr_debug ("block sizes: ed %d td %d\n", | |
346 | sizeof (struct ed), sizeof (struct td)); | |
347 | ||
348 | return driver_register(&ohci_hcd_pxa27x_driver); | |
349 | } | |
350 | ||
351 | static void __exit ohci_hcd_pxa27x_cleanup (void) | |
352 | { | |
353 | driver_unregister(&ohci_hcd_pxa27x_driver); | |
354 | } | |
355 | ||
356 | module_init (ohci_hcd_pxa27x_init); | |
357 | module_exit (ohci_hcd_pxa27x_cleanup); |