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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
23#include <asm/mach-types.h>
24#include <asm/hardware.h>
25#include <asm/arch/pxa-regs.h>
26
27
28#define PMM_NPS_MODE 1
29#define PMM_GLOBAL_MODE 2
30#define PMM_PERPORT_MODE 3
31
32#define PXA_UHC_MAX_PORTNUM 3
33
34#define UHCRHPS(x) __REG2( 0x4C000050, (x)<<2 )
35
36static int pxa27x_ohci_pmm_state;
37
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 */
48static int pxa27x_ohci_select_pmm( int mode )
49{
50 pxa27x_ohci_pmm_state = mode;
51
52 switch ( mode ) {
53 case PMM_NPS_MODE:
54 UHCRHDA |= RH_A_NPS;
55 break;
56 case PMM_GLOBAL_MODE:
57 UHCRHDA &= ~(RH_A_NPS & RH_A_PSM);
58 break;
59 case PMM_PERPORT_MODE:
60 UHCRHDA &= ~(RH_A_NPS);
61 UHCRHDA |= RH_A_PSM;
62
63 /* Set port power control mask bits, only 3 ports. */
64 UHCRHDB |= (0x7<<17);
65 break;
66 default:
67 printk( KERN_ERR
68 "Invalid mode %d, set to non-power switch mode.\n",
69 mode );
70
71 pxa27x_ohci_pmm_state = PMM_NPS_MODE;
72 UHCRHDA |= RH_A_NPS;
73 }
74
75 return 0;
76}
77
Linus Torvalds1da177e2005-04-16 15:20:36 -070078extern int usb_disabled(void);
79
80/*-------------------------------------------------------------------------*/
81
82static void pxa27x_start_hc(struct platform_device *dev)
83{
84 pxa_set_cken(CKEN10_USBHOST, 1);
85
86 UHCHR |= UHCHR_FHR;
87 udelay(11);
88 UHCHR &= ~UHCHR_FHR;
89
90 UHCHR |= UHCHR_FSBIR;
91 while (UHCHR & UHCHR_FSBIR)
92 cpu_relax();
93
94 /* This could be properly abstracted away through the
95 device data the day more machines are supported and
96 their differences can be figured out correctly. */
97 if (machine_is_mainstone()) {
98 /* setup Port1 GPIO pin. */
99 pxa_gpio_mode( 88 | GPIO_ALT_FN_1_IN); /* USBHPWR1 */
100 pxa_gpio_mode( 89 | GPIO_ALT_FN_2_OUT); /* USBHPEN1 */
101
102 /* Set the Power Control Polarity Low and Power Sense
103 Polarity Low to active low. Supply power to USB ports. */
104 UHCHR = (UHCHR | UHCHR_PCPL | UHCHR_PSPL) &
105 ~(UHCHR_SSEP1 | UHCHR_SSEP2 | UHCHR_SSEP3 | UHCHR_SSE);
David Brownell155faf52005-08-31 11:54:09 -0700106
107 pxa27x_ohci_pmm_state = PMM_PERPORT_MODE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 }
109
110 UHCHR &= ~UHCHR_SSE;
111
112 UHCHIE = (UHCHIE_UPRIE | UHCHIE_RWIE);
David Brownell155faf52005-08-31 11:54:09 -0700113
114 /* Clear any OTG Pin Hold */
115 if (PSSR & PSSR_OTGPH)
116 PSSR |= PSSR_OTGPH;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117}
118
119static void pxa27x_stop_hc(struct platform_device *dev)
120{
121 UHCHR |= UHCHR_FHR;
122 udelay(11);
123 UHCHR &= ~UHCHR_FHR;
124
125 UHCCOMS |= 1;
126 udelay(10);
127
128 pxa_set_cken(CKEN10_USBHOST, 0);
129}
130
131
132/*-------------------------------------------------------------------------*/
133
134/* configure so an HC device and id are always provided */
135/* always called with process context; sleeping is OK */
136
137
138/**
139 * usb_hcd_pxa27x_probe - initialize pxa27x-based HCDs
140 * Context: !in_interrupt()
141 *
142 * Allocates basic resources for this USB host controller, and
143 * then invokes the start() method for the HCD associated with it
144 * through the hotplug entry's driver_data.
145 *
146 */
147int usb_hcd_pxa27x_probe (const struct hc_driver *driver,
148 struct platform_device *dev)
149{
150 int retval;
151 struct usb_hcd *hcd;
152
153 if (dev->resource[1].flags != IORESOURCE_IRQ) {
154 pr_debug ("resource[1] is not IORESOURCE_IRQ");
155 return -ENOMEM;
156 }
157
158 hcd = usb_create_hcd (driver, &dev->dev, "pxa27x");
159 if (!hcd)
160 return -ENOMEM;
161 hcd->rsrc_start = dev->resource[0].start;
162 hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1;
163
164 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
165 pr_debug("request_mem_region failed");
166 retval = -EBUSY;
167 goto err1;
168 }
169
170 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
171 if (!hcd->regs) {
172 pr_debug("ioremap failed");
173 retval = -ENOMEM;
174 goto err2;
175 }
176
177 pxa27x_start_hc(dev);
178
179 /* Select Power Management Mode */
David Brownell155faf52005-08-31 11:54:09 -0700180 pxa27x_ohci_select_pmm(pxa27x_ohci_pmm_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
182 ohci_hcd_init(hcd_to_ohci(hcd));
183
184 retval = usb_add_hcd(hcd, dev->resource[1].start, SA_INTERRUPT);
185 if (retval == 0)
186 return retval;
187
188 pxa27x_stop_hc(dev);
189 iounmap(hcd->regs);
190 err2:
191 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
192 err1:
193 usb_put_hcd(hcd);
194 return retval;
195}
196
197
198/* may be called without controller electrically present */
199/* may be called with controller, bus, and devices active */
200
201/**
202 * usb_hcd_pxa27x_remove - shutdown processing for pxa27x-based HCDs
203 * @dev: USB Host Controller being removed
204 * Context: !in_interrupt()
205 *
206 * Reverses the effect of usb_hcd_pxa27x_probe(), first invoking
207 * the HCD's stop() method. It is always called from a thread
208 * context, normally "rmmod", "apmd", or something similar.
209 *
210 */
211void usb_hcd_pxa27x_remove (struct usb_hcd *hcd, struct platform_device *dev)
212{
213 usb_remove_hcd(hcd);
214 pxa27x_stop_hc(dev);
215 iounmap(hcd->regs);
216 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
217 usb_put_hcd(hcd);
218}
219
220/*-------------------------------------------------------------------------*/
221
222static int __devinit
223ohci_pxa27x_start (struct usb_hcd *hcd)
224{
225 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
226 int ret;
227
228 ohci_dbg (ohci, "ohci_pxa27x_start, ohci:%p", ohci);
229
David Brownellfdd13b32005-08-31 11:52:57 -0700230 /* The value of NDP in roothub_a is incorrect on this hardware */
231 ohci->num_ports = 3;
232
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 if ((ret = ohci_init(ohci)) < 0)
234 return ret;
235
236 if ((ret = ohci_run (ohci)) < 0) {
237 err ("can't start %s", hcd->self.bus_name);
238 ohci_stop (hcd);
239 return ret;
240 }
241
242 return 0;
243}
244
245/*-------------------------------------------------------------------------*/
246
247static const struct hc_driver ohci_pxa27x_hc_driver = {
248 .description = hcd_name,
249 .product_desc = "PXA27x OHCI",
250 .hcd_priv_size = sizeof(struct ohci_hcd),
251
252 /*
253 * generic hardware linkage
254 */
255 .irq = ohci_irq,
256 .flags = HCD_USB11 | HCD_MEMORY,
257
258 /*
259 * basic lifecycle operations
260 */
261 .start = ohci_pxa27x_start,
262 .stop = ohci_stop,
263
264 /*
265 * managing i/o requests and associated device resources
266 */
267 .urb_enqueue = ohci_urb_enqueue,
268 .urb_dequeue = ohci_urb_dequeue,
269 .endpoint_disable = ohci_endpoint_disable,
270
271 /*
272 * scheduling support
273 */
274 .get_frame_number = ohci_get_frame,
275
276 /*
277 * root hub support
278 */
279 .hub_status_data = ohci_hub_status_data,
280 .hub_control = ohci_hub_control,
281#ifdef CONFIG_USB_SUSPEND
282 .hub_suspend = ohci_hub_suspend,
283 .hub_resume = ohci_hub_resume,
284#endif
285};
286
287/*-------------------------------------------------------------------------*/
288
289static int ohci_hcd_pxa27x_drv_probe(struct device *dev)
290{
291 struct platform_device *pdev = to_platform_device(dev);
292 int ret;
293
294 pr_debug ("In ohci_hcd_pxa27x_drv_probe");
295
296 if (usb_disabled())
297 return -ENODEV;
298
299 ret = usb_hcd_pxa27x_probe(&ohci_pxa27x_hc_driver, pdev);
300 return ret;
301}
302
303static int ohci_hcd_pxa27x_drv_remove(struct device *dev)
304{
305 struct platform_device *pdev = to_platform_device(dev);
306 struct usb_hcd *hcd = dev_get_drvdata(dev);
307
308 usb_hcd_pxa27x_remove(hcd, pdev);
309 return 0;
310}
311
Pavel Machekba9d35f2005-04-18 17:39:24 -0700312static int ohci_hcd_pxa27x_drv_suspend(struct device *dev, pm_message_t state, u32 level)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313{
314// struct platform_device *pdev = to_platform_device(dev);
315// struct usb_hcd *hcd = dev_get_drvdata(dev);
316 printk("%s: not implemented yet\n", __FUNCTION__);
317
318 return 0;
319}
320
Pavel Machekba9d35f2005-04-18 17:39:24 -0700321static int ohci_hcd_pxa27x_drv_resume(struct device *dev, u32 level)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322{
323// struct platform_device *pdev = to_platform_device(dev);
324// struct usb_hcd *hcd = dev_get_drvdata(dev);
325 printk("%s: not implemented yet\n", __FUNCTION__);
326
327 return 0;
328}
329
330
331static struct device_driver ohci_hcd_pxa27x_driver = {
332 .name = "pxa27x-ohci",
333 .bus = &platform_bus_type,
334 .probe = ohci_hcd_pxa27x_drv_probe,
335 .remove = ohci_hcd_pxa27x_drv_remove,
336 .suspend = ohci_hcd_pxa27x_drv_suspend,
337 .resume = ohci_hcd_pxa27x_drv_resume,
338};
339
340static int __init ohci_hcd_pxa27x_init (void)
341{
342 pr_debug (DRIVER_INFO " (pxa27x)");
343 pr_debug ("block sizes: ed %d td %d\n",
344 sizeof (struct ed), sizeof (struct td));
345
346 return driver_register(&ohci_hcd_pxa27x_driver);
347}
348
349static void __exit ohci_hcd_pxa27x_cleanup (void)
350{
351 driver_unregister(&ohci_hcd_pxa27x_driver);
352}
353
354module_init (ohci_hcd_pxa27x_init);
355module_exit (ohci_hcd_pxa27x_cleanup);