1 /*
2 * OHCI HCD (Host Controller Driver) for USB.
3 *
4 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
5 * (C) Copyright 2000-2005 David Brownell
6 * (C) Copyright 2002 Hewlett-Packard Company
7 *
8 * OMAP Bus Glue
9 *
10 * Modified for OMAP by Tony Lindgren <tony@atomide.com>
11 * Based on the 2.4 OMAP OHCI driver originally done by MontaVista Software Inc.
12 * and on ohci-sa1111.c by Christopher Hoover <ch@hpl.hp.com>
13 *
14 * This file is licenced under the GPL.
15 */
16
17 #include <linux/signal.h> /* IRQF_DISABLED */
18 #include <linux/jiffies.h>
19 #include <linux/platform_device.h>
20 #include <linux/clk.h>
21 #include <linux/gpio.h>
22
23 #include <mach/hardware.h>
24 #include <asm/io.h>
25 #include <asm/mach-types.h>
26
27 #include <mach/mux.h>
28 #include <mach/irqs.h>
29 #include <mach/fpga.h>
30 #include <mach/usb.h>
31
32
33 /* OMAP-1510 OHCI has its own MMU for DMA */
34 #define OMAP1510_LB_MEMSIZE 32 /* Should be same as SDRAM size */
35 #define OMAP1510_LB_CLOCK_DIV 0xfffec10c
36 #define OMAP1510_LB_MMU_CTL 0xfffec208
37 #define OMAP1510_LB_MMU_LCK 0xfffec224
38 #define OMAP1510_LB_MMU_LD_TLB 0xfffec228
39 #define OMAP1510_LB_MMU_CAM_H 0xfffec22c
40 #define OMAP1510_LB_MMU_CAM_L 0xfffec230
41 #define OMAP1510_LB_MMU_RAM_H 0xfffec234
42 #define OMAP1510_LB_MMU_RAM_L 0xfffec238
43
44
45 #ifndef CONFIG_ARCH_OMAP
46 #error "This file is OMAP bus glue. CONFIG_OMAP must be defined."
47 #endif
48
49 #ifdef CONFIG_TPS65010
50 #include <linux/i2c/tps65010.h>
51 #else
52
53 #define LOW 0
54 #define HIGH 1
55
56 #define GPIO1 1
57
tps65010_set_gpio_out_value(unsigned gpio,unsigned value)58 static inline int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
59 {
60 return 0;
61 }
62
63 #endif
64
65 extern int usb_disabled(void);
66 extern int ocpi_enable(void);
67
68 static struct clk *usb_host_ck;
69 static struct clk *usb_dc_ck;
70 static int host_enabled;
71 static int host_initialized;
72
omap_ohci_clock_power(int on)73 static void omap_ohci_clock_power(int on)
74 {
75 if (on) {
76 clk_enable(usb_dc_ck);
77 clk_enable(usb_host_ck);
78 /* guesstimate for T5 == 1x 32K clock + APLL lock time */
79 udelay(100);
80 } else {
81 clk_disable(usb_host_ck);
82 clk_disable(usb_dc_ck);
83 }
84 }
85
86 /*
87 * Board specific gang-switched transceiver power on/off.
88 * NOTE: OSK supplies power from DC, not battery.
89 */
omap_ohci_transceiver_power(int on)90 static int omap_ohci_transceiver_power(int on)
91 {
92 if (on) {
93 if (machine_is_omap_innovator() && cpu_is_omap1510())
94 fpga_write(fpga_read(INNOVATOR_FPGA_CAM_USB_CONTROL)
95 | ((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
96 INNOVATOR_FPGA_CAM_USB_CONTROL);
97 else if (machine_is_omap_osk())
98 tps65010_set_gpio_out_value(GPIO1, LOW);
99 } else {
100 if (machine_is_omap_innovator() && cpu_is_omap1510())
101 fpga_write(fpga_read(INNOVATOR_FPGA_CAM_USB_CONTROL)
102 & ~((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
103 INNOVATOR_FPGA_CAM_USB_CONTROL);
104 else if (machine_is_omap_osk())
105 tps65010_set_gpio_out_value(GPIO1, HIGH);
106 }
107
108 return 0;
109 }
110
111 #ifdef CONFIG_ARCH_OMAP15XX
112 /*
113 * OMAP-1510 specific Local Bus clock on/off
114 */
omap_1510_local_bus_power(int on)115 static int omap_1510_local_bus_power(int on)
116 {
117 if (on) {
118 omap_writel((1 << 1) | (1 << 0), OMAP1510_LB_MMU_CTL);
119 udelay(200);
120 } else {
121 omap_writel(0, OMAP1510_LB_MMU_CTL);
122 }
123
124 return 0;
125 }
126
127 /*
128 * OMAP-1510 specific Local Bus initialization
129 * NOTE: This assumes 32MB memory size in OMAP1510LB_MEMSIZE.
130 * See also arch/mach-omap/memory.h for __virt_to_dma() and
131 * __dma_to_virt() which need to match with the physical
132 * Local Bus address below.
133 */
omap_1510_local_bus_init(void)134 static int omap_1510_local_bus_init(void)
135 {
136 unsigned int tlb;
137 unsigned long lbaddr, physaddr;
138
139 omap_writel((omap_readl(OMAP1510_LB_CLOCK_DIV) & 0xfffffff8) | 0x4,
140 OMAP1510_LB_CLOCK_DIV);
141
142 /* Configure the Local Bus MMU table */
143 for (tlb = 0; tlb < OMAP1510_LB_MEMSIZE; tlb++) {
144 lbaddr = tlb * 0x00100000 + OMAP1510_LB_OFFSET;
145 physaddr = tlb * 0x00100000 + PHYS_OFFSET;
146 omap_writel((lbaddr & 0x0fffffff) >> 22, OMAP1510_LB_MMU_CAM_H);
147 omap_writel(((lbaddr & 0x003ffc00) >> 6) | 0xc,
148 OMAP1510_LB_MMU_CAM_L);
149 omap_writel(physaddr >> 16, OMAP1510_LB_MMU_RAM_H);
150 omap_writel((physaddr & 0x0000fc00) | 0x300, OMAP1510_LB_MMU_RAM_L);
151 omap_writel(tlb << 4, OMAP1510_LB_MMU_LCK);
152 omap_writel(0x1, OMAP1510_LB_MMU_LD_TLB);
153 }
154
155 /* Enable the walking table */
156 omap_writel(omap_readl(OMAP1510_LB_MMU_CTL) | (1 << 3), OMAP1510_LB_MMU_CTL);
157 udelay(200);
158
159 return 0;
160 }
161 #else
162 #define omap_1510_local_bus_power(x) {}
163 #define omap_1510_local_bus_init() {}
164 #endif
165
166 #ifdef CONFIG_USB_OTG
167
start_hnp(struct ohci_hcd * ohci)168 static void start_hnp(struct ohci_hcd *ohci)
169 {
170 const unsigned port = ohci_to_hcd(ohci)->self.otg_port - 1;
171 unsigned long flags;
172 u32 l;
173
174 otg_start_hnp(ohci->transceiver);
175
176 local_irq_save(flags);
177 ohci->transceiver->state = OTG_STATE_A_SUSPEND;
178 writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]);
179 l = omap_readl(OTG_CTRL);
180 l &= ~OTG_A_BUSREQ;
181 omap_writel(l, OTG_CTRL);
182 local_irq_restore(flags);
183 }
184
185 #endif
186
187 /*-------------------------------------------------------------------------*/
188
ohci_omap_init(struct usb_hcd * hcd)189 static int ohci_omap_init(struct usb_hcd *hcd)
190 {
191 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
192 struct omap_usb_config *config = hcd->self.controller->platform_data;
193 int need_transceiver = (config->otg != 0);
194 int ret;
195
196 dev_dbg(hcd->self.controller, "starting USB Controller\n");
197
198 if (config->otg) {
199 ohci_to_hcd(ohci)->self.otg_port = config->otg;
200 /* default/minimum OTG power budget: 8 mA */
201 ohci_to_hcd(ohci)->power_budget = 8;
202 }
203
204 /* boards can use OTG transceivers in non-OTG modes */
205 need_transceiver = need_transceiver
206 || machine_is_omap_h2() || machine_is_omap_h3();
207
208 if (cpu_is_omap16xx())
209 ocpi_enable();
210
211 #ifdef CONFIG_USB_OTG
212 if (need_transceiver) {
213 ohci->transceiver = otg_get_transceiver();
214 if (ohci->transceiver) {
215 int status = otg_set_host(ohci->transceiver,
216 &ohci_to_hcd(ohci)->self);
217 dev_dbg(hcd->self.controller, "init %s transceiver, status %d\n",
218 ohci->transceiver->label, status);
219 if (status) {
220 if (ohci->transceiver)
221 put_device(ohci->transceiver->dev);
222 return status;
223 }
224 } else {
225 dev_err(hcd->self.controller, "can't find transceiver\n");
226 return -ENODEV;
227 }
228 ohci->start_hnp = start_hnp;
229 }
230 #endif
231
232 omap_ohci_clock_power(1);
233
234 if (cpu_is_omap15xx()) {
235 omap_1510_local_bus_power(1);
236 omap_1510_local_bus_init();
237 }
238
239 if ((ret = ohci_init(ohci)) < 0)
240 return ret;
241
242 /* board-specific power switching and overcurrent support */
243 if (machine_is_omap_osk() || machine_is_omap_innovator()) {
244 u32 rh = roothub_a (ohci);
245
246 /* power switching (ganged by default) */
247 rh &= ~RH_A_NPS;
248
249 /* TPS2045 switch for internal transceiver (port 1) */
250 if (machine_is_omap_osk()) {
251 ohci_to_hcd(ohci)->power_budget = 250;
252
253 rh &= ~RH_A_NOCP;
254
255 /* gpio9 for overcurrent detction */
256 omap_cfg_reg(W8_1610_GPIO9);
257 gpio_request(9, "OHCI overcurrent");
258 gpio_direction_input(9);
259
260 /* for paranoia's sake: disable USB.PUEN */
261 omap_cfg_reg(W4_USB_HIGHZ);
262 }
263 ohci_writel(ohci, rh, &ohci->regs->roothub.a);
264 ohci->flags &= ~OHCI_QUIRK_HUB_POWER;
265 } else if (machine_is_nokia770()) {
266 /* We require a self-powered hub, which should have
267 * plenty of power. */
268 ohci_to_hcd(ohci)->power_budget = 0;
269 }
270
271 /* FIXME khubd hub requests should manage power switching */
272 omap_ohci_transceiver_power(1);
273
274 /* board init will have already handled HMC and mux setup.
275 * any external transceiver should already be initialized
276 * too, so all configured ports use the right signaling now.
277 */
278
279 return 0;
280 }
281
ohci_omap_stop(struct usb_hcd * hcd)282 static void ohci_omap_stop(struct usb_hcd *hcd)
283 {
284 dev_dbg(hcd->self.controller, "stopping USB Controller\n");
285 omap_ohci_clock_power(0);
286 }
287
288
289 /*-------------------------------------------------------------------------*/
290
291 /**
292 * usb_hcd_omap_probe - initialize OMAP-based HCDs
293 * Context: !in_interrupt()
294 *
295 * Allocates basic resources for this USB host controller, and
296 * then invokes the start() method for the HCD associated with it
297 * through the hotplug entry's driver_data.
298 */
usb_hcd_omap_probe(const struct hc_driver * driver,struct platform_device * pdev)299 static int usb_hcd_omap_probe (const struct hc_driver *driver,
300 struct platform_device *pdev)
301 {
302 int retval, irq;
303 struct usb_hcd *hcd = 0;
304 struct ohci_hcd *ohci;
305
306 if (pdev->num_resources != 2) {
307 printk(KERN_ERR "hcd probe: invalid num_resources: %i\n",
308 pdev->num_resources);
309 return -ENODEV;
310 }
311
312 if (pdev->resource[0].flags != IORESOURCE_MEM
313 || pdev->resource[1].flags != IORESOURCE_IRQ) {
314 printk(KERN_ERR "hcd probe: invalid resource type\n");
315 return -ENODEV;
316 }
317
318 usb_host_ck = clk_get(&pdev->dev, "usb_hhc_ck");
319 if (IS_ERR(usb_host_ck))
320 return PTR_ERR(usb_host_ck);
321
322 if (!cpu_is_omap15xx())
323 usb_dc_ck = clk_get(&pdev->dev, "usb_dc_ck");
324 else
325 usb_dc_ck = clk_get(&pdev->dev, "lb_ck");
326
327 if (IS_ERR(usb_dc_ck)) {
328 clk_put(usb_host_ck);
329 return PTR_ERR(usb_dc_ck);
330 }
331
332
333 hcd = usb_create_hcd (driver, &pdev->dev, dev_name(&pdev->dev));
334 if (!hcd) {
335 retval = -ENOMEM;
336 goto err0;
337 }
338 hcd->rsrc_start = pdev->resource[0].start;
339 hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
340
341 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
342 dev_dbg(&pdev->dev, "request_mem_region failed\n");
343 retval = -EBUSY;
344 goto err1;
345 }
346
347 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
348 if (!hcd->regs) {
349 dev_err(&pdev->dev, "can't ioremap OHCI HCD\n");
350 retval = -ENOMEM;
351 goto err2;
352 }
353
354 ohci = hcd_to_ohci(hcd);
355 ohci_hcd_init(ohci);
356
357 host_initialized = 0;
358 host_enabled = 1;
359
360 irq = platform_get_irq(pdev, 0);
361 if (irq < 0) {
362 retval = -ENXIO;
363 goto err3;
364 }
365 retval = usb_add_hcd(hcd, irq, IRQF_DISABLED);
366 if (retval)
367 goto err3;
368
369 host_initialized = 1;
370
371 if (!host_enabled)
372 omap_ohci_clock_power(0);
373
374 return 0;
375 err3:
376 iounmap(hcd->regs);
377 err2:
378 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
379 err1:
380 usb_put_hcd(hcd);
381 err0:
382 clk_put(usb_dc_ck);
383 clk_put(usb_host_ck);
384 return retval;
385 }
386
387
388 /* may be called with controller, bus, and devices active */
389
390 /**
391 * usb_hcd_omap_remove - shutdown processing for OMAP-based HCDs
392 * @dev: USB Host Controller being removed
393 * Context: !in_interrupt()
394 *
395 * Reverses the effect of usb_hcd_omap_probe(), first invoking
396 * the HCD's stop() method. It is always called from a thread
397 * context, normally "rmmod", "apmd", or something similar.
398 */
399 static inline void
usb_hcd_omap_remove(struct usb_hcd * hcd,struct platform_device * pdev)400 usb_hcd_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev)
401 {
402 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
403
404 usb_remove_hcd(hcd);
405 if (ohci->transceiver) {
406 (void) otg_set_host(ohci->transceiver, 0);
407 put_device(ohci->transceiver->dev);
408 }
409 if (machine_is_omap_osk())
410 gpio_free(9);
411 iounmap(hcd->regs);
412 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
413 usb_put_hcd(hcd);
414 clk_put(usb_dc_ck);
415 clk_put(usb_host_ck);
416 }
417
418 /*-------------------------------------------------------------------------*/
419
420 static int
ohci_omap_start(struct usb_hcd * hcd)421 ohci_omap_start (struct usb_hcd *hcd)
422 {
423 struct omap_usb_config *config;
424 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
425 int ret;
426
427 if (!host_enabled)
428 return 0;
429 config = hcd->self.controller->platform_data;
430 if (config->otg || config->rwc) {
431 ohci->hc_control = OHCI_CTRL_RWC;
432 writel(OHCI_CTRL_RWC, &ohci->regs->control);
433 }
434
435 if ((ret = ohci_run (ohci)) < 0) {
436 dev_err(hcd->self.controller, "can't start\n");
437 ohci_stop (hcd);
438 return ret;
439 }
440 return 0;
441 }
442
443 /*-------------------------------------------------------------------------*/
444
445 static const struct hc_driver ohci_omap_hc_driver = {
446 .description = hcd_name,
447 .product_desc = "OMAP OHCI",
448 .hcd_priv_size = sizeof(struct ohci_hcd),
449
450 /*
451 * generic hardware linkage
452 */
453 .irq = ohci_irq,
454 .flags = HCD_USB11 | HCD_MEMORY,
455
456 /*
457 * basic lifecycle operations
458 */
459 .reset = ohci_omap_init,
460 .start = ohci_omap_start,
461 .stop = ohci_omap_stop,
462 .shutdown = ohci_shutdown,
463
464 /*
465 * managing i/o requests and associated device resources
466 */
467 .urb_enqueue = ohci_urb_enqueue,
468 .urb_dequeue = ohci_urb_dequeue,
469 .endpoint_disable = ohci_endpoint_disable,
470
471 /*
472 * scheduling support
473 */
474 .get_frame_number = ohci_get_frame,
475
476 /*
477 * root hub support
478 */
479 .hub_status_data = ohci_hub_status_data,
480 .hub_control = ohci_hub_control,
481 #ifdef CONFIG_PM
482 .bus_suspend = ohci_bus_suspend,
483 .bus_resume = ohci_bus_resume,
484 #endif
485 .start_port_reset = ohci_start_port_reset,
486 };
487
488 /*-------------------------------------------------------------------------*/
489
ohci_hcd_omap_drv_probe(struct platform_device * dev)490 static int ohci_hcd_omap_drv_probe(struct platform_device *dev)
491 {
492 return usb_hcd_omap_probe(&ohci_omap_hc_driver, dev);
493 }
494
ohci_hcd_omap_drv_remove(struct platform_device * dev)495 static int ohci_hcd_omap_drv_remove(struct platform_device *dev)
496 {
497 struct usb_hcd *hcd = platform_get_drvdata(dev);
498
499 usb_hcd_omap_remove(hcd, dev);
500 platform_set_drvdata(dev, NULL);
501
502 return 0;
503 }
504
505 /*-------------------------------------------------------------------------*/
506
507 #ifdef CONFIG_PM
508
ohci_omap_suspend(struct platform_device * dev,pm_message_t message)509 static int ohci_omap_suspend(struct platform_device *dev, pm_message_t message)
510 {
511 struct ohci_hcd *ohci = hcd_to_ohci(platform_get_drvdata(dev));
512
513 if (time_before(jiffies, ohci->next_statechange))
514 msleep(5);
515 ohci->next_statechange = jiffies;
516
517 omap_ohci_clock_power(0);
518 ohci_to_hcd(ohci)->state = HC_STATE_SUSPENDED;
519 return 0;
520 }
521
ohci_omap_resume(struct platform_device * dev)522 static int ohci_omap_resume(struct platform_device *dev)
523 {
524 struct usb_hcd *hcd = platform_get_drvdata(dev);
525 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
526
527 if (time_before(jiffies, ohci->next_statechange))
528 msleep(5);
529 ohci->next_statechange = jiffies;
530
531 omap_ohci_clock_power(1);
532 ohci_finish_controller_resume(hcd);
533 return 0;
534 }
535
536 #endif
537
538 /*-------------------------------------------------------------------------*/
539
540 /*
541 * Driver definition to register with the OMAP bus
542 */
543 static struct platform_driver ohci_hcd_omap_driver = {
544 .probe = ohci_hcd_omap_drv_probe,
545 .remove = ohci_hcd_omap_drv_remove,
546 .shutdown = usb_hcd_platform_shutdown,
547 #ifdef CONFIG_PM
548 .suspend = ohci_omap_suspend,
549 .resume = ohci_omap_resume,
550 #endif
551 .driver = {
552 .owner = THIS_MODULE,
553 .name = "ohci",
554 },
555 };
556
557 MODULE_ALIAS("platform:ohci");
558