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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 <plat/mux.h>
28#include <mach/irqs.h>
29#include <plat/fpga.h>
30#include <plat/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
58static inline int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
59{
60 return 0;
61}
62
63#endif
64
65extern int usb_disabled(void);
66extern int ocpi_enable(void);
67
68static struct clk *usb_host_ck;
69static struct clk *usb_dc_ck;
70static int host_enabled;
71static int host_initialized;
72
73static 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 */
90static 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 */
115static 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 */
134static 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
168static 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
189static 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
282static void ohci_omap_stop(struct usb_hcd *hcd)
283{
284 dev_dbg(hcd->self.controller, "stopping USB Controller\n");
285 ohci_stop(hcd);
286 omap_ohci_clock_power(0);
287}
288
289
290/*-------------------------------------------------------------------------*/
291
292/**
293 * usb_hcd_omap_probe - initialize OMAP-based HCDs
294 * Context: !in_interrupt()
295 *
296 * Allocates basic resources for this USB host controller, and
297 * then invokes the start() method for the HCD associated with it
298 * through the hotplug entry's driver_data.
299 */
300static int usb_hcd_omap_probe (const struct hc_driver *driver,
301 struct platform_device *pdev)
302{
303 int retval, irq;
304 struct usb_hcd *hcd = 0;
305 struct ohci_hcd *ohci;
306
307 if (pdev->num_resources != 2) {
308 printk(KERN_ERR "hcd probe: invalid num_resources: %i\n",
309 pdev->num_resources);
310 return -ENODEV;
311 }
312
313 if (pdev->resource[0].flags != IORESOURCE_MEM
314 || pdev->resource[1].flags != IORESOURCE_IRQ) {
315 printk(KERN_ERR "hcd probe: invalid resource type\n");
316 return -ENODEV;
317 }
318
319 usb_host_ck = clk_get(&pdev->dev, "usb_hhc_ck");
320 if (IS_ERR(usb_host_ck))
321 return PTR_ERR(usb_host_ck);
322
323 if (!cpu_is_omap15xx())
324 usb_dc_ck = clk_get(&pdev->dev, "usb_dc_ck");
325 else
326 usb_dc_ck = clk_get(&pdev->dev, "lb_ck");
327
328 if (IS_ERR(usb_dc_ck)) {
329 clk_put(usb_host_ck);
330 return PTR_ERR(usb_dc_ck);
331 }
332
333
334 hcd = usb_create_hcd (driver, &pdev->dev, dev_name(&pdev->dev));
335 if (!hcd) {
336 retval = -ENOMEM;
337 goto err0;
338 }
339 hcd->rsrc_start = pdev->resource[0].start;
340 hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
341
342 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
343 dev_dbg(&pdev->dev, "request_mem_region failed\n");
344 retval = -EBUSY;
345 goto err1;
346 }
347
348 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
349 if (!hcd->regs) {
350 dev_err(&pdev->dev, "can't ioremap OHCI HCD\n");
351 retval = -ENOMEM;
352 goto err2;
353 }
354
355 ohci = hcd_to_ohci(hcd);
356 ohci_hcd_init(ohci);
357
358 host_initialized = 0;
359 host_enabled = 1;
360
361 irq = platform_get_irq(pdev, 0);
362 if (irq < 0) {
363 retval = -ENXIO;
364 goto err3;
365 }
366 retval = usb_add_hcd(hcd, irq, IRQF_DISABLED);
367 if (retval)
368 goto err3;
369
370 host_initialized = 1;
371
372 if (!host_enabled)
373 omap_ohci_clock_power(0);
374
375 return 0;
376err3:
377 iounmap(hcd->regs);
378err2:
379 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
380err1:
381 usb_put_hcd(hcd);
382err0:
383 clk_put(usb_dc_ck);
384 clk_put(usb_host_ck);
385 return retval;
386}
387
388
389/* may be called with controller, bus, and devices active */
390
391/**
392 * usb_hcd_omap_remove - shutdown processing for OMAP-based HCDs
393 * @dev: USB Host Controller being removed
394 * Context: !in_interrupt()
395 *
396 * Reverses the effect of usb_hcd_omap_probe(), first invoking
397 * the HCD's stop() method. It is always called from a thread
398 * context, normally "rmmod", "apmd", or something similar.
399 */
400static inline void
401usb_hcd_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev)
402{
403 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
404
405 usb_remove_hcd(hcd);
406 if (ohci->transceiver) {
407 (void) otg_set_host(ohci->transceiver, 0);
408 put_device(ohci->transceiver->dev);
409 }
410 if (machine_is_omap_osk())
411 gpio_free(9);
412 iounmap(hcd->regs);
413 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
414 usb_put_hcd(hcd);
415 clk_put(usb_dc_ck);
416 clk_put(usb_host_ck);
417}
418
419/*-------------------------------------------------------------------------*/
420
421static int
422ohci_omap_start (struct usb_hcd *hcd)
423{
424 struct omap_usb_config *config;
425 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
426 int ret;
427
428 if (!host_enabled)
429 return 0;
430 config = hcd->self.controller->platform_data;
431 if (config->otg || config->rwc) {
432 ohci->hc_control = OHCI_CTRL_RWC;
433 writel(OHCI_CTRL_RWC, &ohci->regs->control);
434 }
435
436 if ((ret = ohci_run (ohci)) < 0) {
437 dev_err(hcd->self.controller, "can't start\n");
438 ohci_stop (hcd);
439 return ret;
440 }
441 return 0;
442}
443
444/*-------------------------------------------------------------------------*/
445
446static const struct hc_driver ohci_omap_hc_driver = {
447 .description = hcd_name,
448 .product_desc = "OMAP OHCI",
449 .hcd_priv_size = sizeof(struct ohci_hcd),
450
451 /*
452 * generic hardware linkage
453 */
454 .irq = ohci_irq,
455 .flags = HCD_USB11 | HCD_MEMORY,
456
457 /*
458 * basic lifecycle operations
459 */
460 .reset = ohci_omap_init,
461 .start = ohci_omap_start,
462 .stop = ohci_omap_stop,
463 .shutdown = ohci_shutdown,
464
465 /*
466 * managing i/o requests and associated device resources
467 */
468 .urb_enqueue = ohci_urb_enqueue,
469 .urb_dequeue = ohci_urb_dequeue,
470 .endpoint_disable = ohci_endpoint_disable,
471
472 /*
473 * scheduling support
474 */
475 .get_frame_number = ohci_get_frame,
476
477 /*
478 * root hub support
479 */
480 .hub_status_data = ohci_hub_status_data,
481 .hub_control = ohci_hub_control,
482#ifdef CONFIG_PM
483 .bus_suspend = ohci_bus_suspend,
484 .bus_resume = ohci_bus_resume,
485#endif
486 .start_port_reset = ohci_start_port_reset,
487};
488
489/*-------------------------------------------------------------------------*/
490
491static int ohci_hcd_omap_drv_probe(struct platform_device *dev)
492{
493 return usb_hcd_omap_probe(&ohci_omap_hc_driver, dev);
494}
495
496static int ohci_hcd_omap_drv_remove(struct platform_device *dev)
497{
498 struct usb_hcd *hcd = platform_get_drvdata(dev);
499
500 usb_hcd_omap_remove(hcd, dev);
501 platform_set_drvdata(dev, NULL);
502
503 return 0;
504}
505
506/*-------------------------------------------------------------------------*/
507
508#ifdef CONFIG_PM
509
510static int ohci_omap_suspend(struct platform_device *dev, pm_message_t message)
511{
512 struct ohci_hcd *ohci = hcd_to_ohci(platform_get_drvdata(dev));
513
514 if (time_before(jiffies, ohci->next_statechange))
515 msleep(5);
516 ohci->next_statechange = jiffies;
517
518 omap_ohci_clock_power(0);
519 ohci_to_hcd(ohci)->state = HC_STATE_SUSPENDED;
520 return 0;
521}
522
523static int ohci_omap_resume(struct platform_device *dev)
524{
525 struct usb_hcd *hcd = platform_get_drvdata(dev);
526 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
527
528 if (time_before(jiffies, ohci->next_statechange))
529 msleep(5);
530 ohci->next_statechange = jiffies;
531
532 omap_ohci_clock_power(1);
533 ohci_finish_controller_resume(hcd);
534 return 0;
535}
536
537#endif
538
539/*-------------------------------------------------------------------------*/
540
541/*
542 * Driver definition to register with the OMAP bus
543 */
544static struct platform_driver ohci_hcd_omap_driver = {
545 .probe = ohci_hcd_omap_drv_probe,
546 .remove = ohci_hcd_omap_drv_remove,
547 .shutdown = usb_hcd_platform_shutdown,
548#ifdef CONFIG_PM
549 .suspend = ohci_omap_suspend,
550 .resume = ohci_omap_resume,
551#endif
552 .driver = {
553 .owner = THIS_MODULE,
554 .name = "ohci",
555 },
556};
557
558MODULE_ALIAS("platform:ohci");
1// SPDX-License-Identifier: GPL-1.0+
2/*
3 * OHCI HCD (Host Controller Driver) for USB.
4 *
5 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
6 * (C) Copyright 2000-2005 David Brownell
7 * (C) Copyright 2002 Hewlett-Packard Company
8 *
9 * OMAP Bus Glue
10 *
11 * Modified for OMAP by Tony Lindgren <tony@atomide.com>
12 * Based on the 2.4 OMAP OHCI driver originally done by MontaVista Software Inc.
13 * and on ohci-sa1111.c by Christopher Hoover <ch@hpl.hp.com>
14 *
15 * This file is licenced under the GPL.
16 */
17
18#include <linux/clk.h>
19#include <linux/dma-mapping.h>
20#include <linux/err.h>
21#include <linux/gpio/consumer.h>
22#include <linux/io.h>
23#include <linux/jiffies.h>
24#include <linux/kernel.h>
25#include <linux/module.h>
26#include <linux/usb/otg.h>
27#include <linux/platform_device.h>
28#include <linux/signal.h>
29#include <linux/usb.h>
30#include <linux/usb/hcd.h>
31
32#include "ohci.h"
33
34#include <asm/io.h>
35#include <asm/mach-types.h>
36
37#include <mach/mux.h>
38
39#include <mach/hardware.h>
40#include <mach/usb.h>
41
42
43/* OMAP-1510 OHCI has its own MMU for DMA */
44#define OMAP1510_LB_MEMSIZE 32 /* Should be same as SDRAM size */
45#define OMAP1510_LB_CLOCK_DIV 0xfffec10c
46#define OMAP1510_LB_MMU_CTL 0xfffec208
47#define OMAP1510_LB_MMU_LCK 0xfffec224
48#define OMAP1510_LB_MMU_LD_TLB 0xfffec228
49#define OMAP1510_LB_MMU_CAM_H 0xfffec22c
50#define OMAP1510_LB_MMU_CAM_L 0xfffec230
51#define OMAP1510_LB_MMU_RAM_H 0xfffec234
52#define OMAP1510_LB_MMU_RAM_L 0xfffec238
53
54#define DRIVER_DESC "OHCI OMAP driver"
55
56struct ohci_omap_priv {
57 struct clk *usb_host_ck;
58 struct clk *usb_dc_ck;
59 struct gpio_desc *power;
60 struct gpio_desc *overcurrent;
61};
62
63static const char hcd_name[] = "ohci-omap";
64static struct hc_driver __read_mostly ohci_omap_hc_driver;
65
66#define hcd_to_ohci_omap_priv(h) \
67 ((struct ohci_omap_priv *)hcd_to_ohci(h)->priv)
68
69static void omap_ohci_clock_power(struct ohci_omap_priv *priv, int on)
70{
71 if (on) {
72 clk_enable(priv->usb_dc_ck);
73 clk_enable(priv->usb_host_ck);
74 /* guesstimate for T5 == 1x 32K clock + APLL lock time */
75 udelay(100);
76 } else {
77 clk_disable(priv->usb_host_ck);
78 clk_disable(priv->usb_dc_ck);
79 }
80}
81
82/*
83 * Board specific gang-switched transceiver power on/off.
84 * NOTE: OSK supplies power from DC, not battery.
85 */
86static int omap_ohci_transceiver_power(struct ohci_omap_priv *priv, int on)
87{
88 if (on) {
89 if (machine_is_omap_innovator() && cpu_is_omap1510())
90 __raw_writeb(__raw_readb(INNOVATOR_FPGA_CAM_USB_CONTROL)
91 | ((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
92 INNOVATOR_FPGA_CAM_USB_CONTROL);
93 else if (priv->power)
94 gpiod_set_value_cansleep(priv->power, 0);
95 } else {
96 if (machine_is_omap_innovator() && cpu_is_omap1510())
97 __raw_writeb(__raw_readb(INNOVATOR_FPGA_CAM_USB_CONTROL)
98 & ~((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
99 INNOVATOR_FPGA_CAM_USB_CONTROL);
100 else if (priv->power)
101 gpiod_set_value_cansleep(priv->power, 1);
102 }
103
104 return 0;
105}
106
107#ifdef CONFIG_ARCH_OMAP15XX
108/*
109 * OMAP-1510 specific Local Bus clock on/off
110 */
111static int omap_1510_local_bus_power(int on)
112{
113 if (on) {
114 omap_writel((1 << 1) | (1 << 0), OMAP1510_LB_MMU_CTL);
115 udelay(200);
116 } else {
117 omap_writel(0, OMAP1510_LB_MMU_CTL);
118 }
119
120 return 0;
121}
122
123/*
124 * OMAP-1510 specific Local Bus initialization
125 * NOTE: This assumes 32MB memory size in OMAP1510LB_MEMSIZE.
126 * See also arch/mach-omap/memory.h for __virt_to_dma() and
127 * __dma_to_virt() which need to match with the physical
128 * Local Bus address below.
129 */
130static int omap_1510_local_bus_init(void)
131{
132 unsigned int tlb;
133 unsigned long lbaddr, physaddr;
134
135 omap_writel((omap_readl(OMAP1510_LB_CLOCK_DIV) & 0xfffffff8) | 0x4,
136 OMAP1510_LB_CLOCK_DIV);
137
138 /* Configure the Local Bus MMU table */
139 for (tlb = 0; tlb < OMAP1510_LB_MEMSIZE; tlb++) {
140 lbaddr = tlb * 0x00100000 + OMAP1510_LB_OFFSET;
141 physaddr = tlb * 0x00100000 + PHYS_OFFSET;
142 omap_writel((lbaddr & 0x0fffffff) >> 22, OMAP1510_LB_MMU_CAM_H);
143 omap_writel(((lbaddr & 0x003ffc00) >> 6) | 0xc,
144 OMAP1510_LB_MMU_CAM_L);
145 omap_writel(physaddr >> 16, OMAP1510_LB_MMU_RAM_H);
146 omap_writel((physaddr & 0x0000fc00) | 0x300, OMAP1510_LB_MMU_RAM_L);
147 omap_writel(tlb << 4, OMAP1510_LB_MMU_LCK);
148 omap_writel(0x1, OMAP1510_LB_MMU_LD_TLB);
149 }
150
151 /* Enable the walking table */
152 omap_writel(omap_readl(OMAP1510_LB_MMU_CTL) | (1 << 3), OMAP1510_LB_MMU_CTL);
153 udelay(200);
154
155 return 0;
156}
157#else
158#define omap_1510_local_bus_power(x) {}
159#define omap_1510_local_bus_init() {}
160#endif
161
162#ifdef CONFIG_USB_OTG
163
164static void start_hnp(struct ohci_hcd *ohci)
165{
166 struct usb_hcd *hcd = ohci_to_hcd(ohci);
167 const unsigned port = hcd->self.otg_port - 1;
168 unsigned long flags;
169 u32 l;
170
171 otg_start_hnp(hcd->usb_phy->otg);
172
173 local_irq_save(flags);
174 hcd->usb_phy->otg->state = OTG_STATE_A_SUSPEND;
175 writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]);
176 l = omap_readl(OTG_CTRL);
177 l &= ~OTG_A_BUSREQ;
178 omap_writel(l, OTG_CTRL);
179 local_irq_restore(flags);
180}
181
182#endif
183
184/*-------------------------------------------------------------------------*/
185
186static int ohci_omap_reset(struct usb_hcd *hcd)
187{
188 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
189 struct omap_usb_config *config = dev_get_platdata(hcd->self.controller);
190 struct ohci_omap_priv *priv = hcd_to_ohci_omap_priv(hcd);
191 int need_transceiver = (config->otg != 0);
192 int ret;
193
194 dev_dbg(hcd->self.controller, "starting USB Controller\n");
195
196 if (config->otg) {
197 hcd->self.otg_port = config->otg;
198 /* default/minimum OTG power budget: 8 mA */
199 hcd->power_budget = 8;
200 }
201
202 /* boards can use OTG transceivers in non-OTG modes */
203 need_transceiver = need_transceiver
204 || machine_is_omap_h2() || machine_is_omap_h3();
205
206 /* XXX OMAP16xx only */
207 if (config->ocpi_enable)
208 config->ocpi_enable();
209
210#ifdef CONFIG_USB_OTG
211 if (need_transceiver) {
212 hcd->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
213 if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
214 int status = otg_set_host(hcd->usb_phy->otg,
215 &ohci_to_hcd(ohci)->self);
216 dev_dbg(hcd->self.controller, "init %s phy, status %d\n",
217 hcd->usb_phy->label, status);
218 if (status) {
219 usb_put_phy(hcd->usb_phy);
220 return status;
221 }
222 } else {
223 return -EPROBE_DEFER;
224 }
225 hcd->skip_phy_initialization = 1;
226 ohci->start_hnp = start_hnp;
227 }
228#endif
229
230 omap_ohci_clock_power(priv, 1);
231
232 if (cpu_is_omap15xx()) {
233 omap_1510_local_bus_power(1);
234 omap_1510_local_bus_init();
235 }
236
237 ret = ohci_setup(hcd);
238 if (ret < 0)
239 return ret;
240
241 if (config->otg || config->rwc) {
242 ohci->hc_control = OHCI_CTRL_RWC;
243 writel(OHCI_CTRL_RWC, &ohci->regs->control);
244 }
245
246 /* board-specific power switching and overcurrent support */
247 if (machine_is_omap_osk() || machine_is_omap_innovator()) {
248 u32 rh = roothub_a (ohci);
249
250 /* power switching (ganged by default) */
251 rh &= ~RH_A_NPS;
252
253 /* TPS2045 switch for internal transceiver (port 1) */
254 if (machine_is_omap_osk()) {
255 ohci_to_hcd(ohci)->power_budget = 250;
256
257 rh &= ~RH_A_NOCP;
258
259 /* gpio9 for overcurrent detction */
260 omap_cfg_reg(W8_1610_GPIO9);
261
262 /* for paranoia's sake: disable USB.PUEN */
263 omap_cfg_reg(W4_USB_HIGHZ);
264 }
265 ohci_writel(ohci, rh, &ohci->regs->roothub.a);
266 ohci->flags &= ~OHCI_QUIRK_HUB_POWER;
267 } else if (machine_is_nokia770()) {
268 /* We require a self-powered hub, which should have
269 * plenty of power. */
270 ohci_to_hcd(ohci)->power_budget = 0;
271 }
272
273 /* FIXME hub_wq hub requests should manage power switching */
274 omap_ohci_transceiver_power(priv, 1);
275
276 /* board init will have already handled HMC and mux setup.
277 * any external transceiver should already be initialized
278 * too, so all configured ports use the right signaling now.
279 */
280
281 return 0;
282}
283
284/*-------------------------------------------------------------------------*/
285
286/**
287 * ohci_hcd_omap_probe - initialize OMAP-based HCDs
288 * @pdev: USB controller to probe
289 *
290 * Context: task context, might sleep
291 *
292 * Allocates basic resources for this USB host controller, and
293 * then invokes the start() method for the HCD associated with it
294 * through the hotplug entry's driver_data.
295 */
296static int ohci_hcd_omap_probe(struct platform_device *pdev)
297{
298 int retval, irq;
299 struct usb_hcd *hcd = 0;
300 struct ohci_omap_priv *priv;
301
302 if (pdev->num_resources != 2) {
303 dev_err(&pdev->dev, "invalid num_resources: %i\n",
304 pdev->num_resources);
305 return -ENODEV;
306 }
307
308 if (pdev->resource[0].flags != IORESOURCE_MEM
309 || pdev->resource[1].flags != IORESOURCE_IRQ) {
310 dev_err(&pdev->dev, "invalid resource type\n");
311 return -ENODEV;
312 }
313
314 hcd = usb_create_hcd(&ohci_omap_hc_driver, &pdev->dev,
315 dev_name(&pdev->dev));
316 if (!hcd)
317 return -ENOMEM;
318
319 hcd->rsrc_start = pdev->resource[0].start;
320 hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
321 priv = hcd_to_ohci_omap_priv(hcd);
322
323 /* Obtain two optional GPIO lines */
324 priv->power = devm_gpiod_get_optional(&pdev->dev, "power", GPIOD_ASIS);
325 if (IS_ERR(priv->power)) {
326 retval = PTR_ERR(priv->power);
327 goto err_put_hcd;
328 }
329 if (priv->power)
330 gpiod_set_consumer_name(priv->power, "OHCI power");
331
332 /*
333 * This "overcurrent" GPIO line isn't really used in the code,
334 * but has a designated hardware function.
335 * TODO: implement proper overcurrent handling.
336 */
337 priv->overcurrent = devm_gpiod_get_optional(&pdev->dev, "overcurrent",
338 GPIOD_IN);
339 if (IS_ERR(priv->overcurrent)) {
340 retval = PTR_ERR(priv->overcurrent);
341 goto err_put_hcd;
342 }
343 if (priv->overcurrent)
344 gpiod_set_consumer_name(priv->overcurrent, "OHCI overcurrent");
345
346 priv->usb_host_ck = clk_get(&pdev->dev, "usb_hhc_ck");
347 if (IS_ERR(priv->usb_host_ck)) {
348 retval = PTR_ERR(priv->usb_host_ck);
349 goto err_put_hcd;
350 }
351
352 if (!cpu_is_omap15xx())
353 priv->usb_dc_ck = clk_get(&pdev->dev, "usb_dc_ck");
354 else
355 priv->usb_dc_ck = clk_get(&pdev->dev, "lb_ck");
356
357 if (IS_ERR(priv->usb_dc_ck)) {
358 retval = PTR_ERR(priv->usb_dc_ck);
359 goto err_put_host_ck;
360 }
361
362 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
363 dev_dbg(&pdev->dev, "request_mem_region failed\n");
364 retval = -EBUSY;
365 goto err_put_dc_ck;
366 }
367
368 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
369 if (!hcd->regs) {
370 dev_err(&pdev->dev, "can't ioremap OHCI HCD\n");
371 retval = -ENOMEM;
372 goto err2;
373 }
374
375 irq = platform_get_irq(pdev, 0);
376 if (irq < 0) {
377 retval = -ENXIO;
378 goto err3;
379 }
380 retval = usb_add_hcd(hcd, irq, 0);
381 if (retval)
382 goto err3;
383
384 device_wakeup_enable(hcd->self.controller);
385 return 0;
386err3:
387 iounmap(hcd->regs);
388err2:
389 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
390err_put_dc_ck:
391 clk_put(priv->usb_dc_ck);
392err_put_host_ck:
393 clk_put(priv->usb_host_ck);
394err_put_hcd:
395 usb_put_hcd(hcd);
396 return retval;
397}
398
399
400/* may be called with controller, bus, and devices active */
401
402/**
403 * ohci_hcd_omap_remove - shutdown processing for OMAP-based HCDs
404 * @pdev: USB Host Controller being removed
405 *
406 * Context: task context, might sleep
407 *
408 * Reverses the effect of ohci_hcd_omap_probe(), first invoking
409 * the HCD's stop() method. It is always called from a thread
410 * context, normally "rmmod", "apmd", or something similar.
411 */
412static int ohci_hcd_omap_remove(struct platform_device *pdev)
413{
414 struct usb_hcd *hcd = platform_get_drvdata(pdev);
415 struct ohci_omap_priv *priv = hcd_to_ohci_omap_priv(hcd);
416
417 dev_dbg(hcd->self.controller, "stopping USB Controller\n");
418 usb_remove_hcd(hcd);
419 omap_ohci_clock_power(priv, 0);
420 if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
421 (void) otg_set_host(hcd->usb_phy->otg, 0);
422 usb_put_phy(hcd->usb_phy);
423 }
424 iounmap(hcd->regs);
425 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
426 clk_put(priv->usb_dc_ck);
427 clk_put(priv->usb_host_ck);
428 usb_put_hcd(hcd);
429 return 0;
430}
431
432/*-------------------------------------------------------------------------*/
433
434#ifdef CONFIG_PM
435
436static int ohci_omap_suspend(struct platform_device *pdev, pm_message_t message)
437{
438 struct usb_hcd *hcd = platform_get_drvdata(pdev);
439 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
440 struct ohci_omap_priv *priv = hcd_to_ohci_omap_priv(hcd);
441 bool do_wakeup = device_may_wakeup(&pdev->dev);
442 int ret;
443
444 if (time_before(jiffies, ohci->next_statechange))
445 msleep(5);
446 ohci->next_statechange = jiffies;
447
448 ret = ohci_suspend(hcd, do_wakeup);
449 if (ret)
450 return ret;
451
452 omap_ohci_clock_power(priv, 0);
453 return ret;
454}
455
456static int ohci_omap_resume(struct platform_device *dev)
457{
458 struct usb_hcd *hcd = platform_get_drvdata(dev);
459 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
460 struct ohci_omap_priv *priv = hcd_to_ohci_omap_priv(hcd);
461
462 if (time_before(jiffies, ohci->next_statechange))
463 msleep(5);
464 ohci->next_statechange = jiffies;
465
466 omap_ohci_clock_power(priv, 1);
467 ohci_resume(hcd, false);
468 return 0;
469}
470
471#endif
472
473/*-------------------------------------------------------------------------*/
474
475/*
476 * Driver definition to register with the OMAP bus
477 */
478static struct platform_driver ohci_hcd_omap_driver = {
479 .probe = ohci_hcd_omap_probe,
480 .remove = ohci_hcd_omap_remove,
481 .shutdown = usb_hcd_platform_shutdown,
482#ifdef CONFIG_PM
483 .suspend = ohci_omap_suspend,
484 .resume = ohci_omap_resume,
485#endif
486 .driver = {
487 .name = "ohci",
488 },
489};
490
491static const struct ohci_driver_overrides omap_overrides __initconst = {
492 .product_desc = "OMAP OHCI",
493 .reset = ohci_omap_reset,
494 .extra_priv_size = sizeof(struct ohci_omap_priv),
495};
496
497static int __init ohci_omap_init(void)
498{
499 if (usb_disabled())
500 return -ENODEV;
501
502 pr_info("%s: " DRIVER_DESC "\n", hcd_name);
503
504 ohci_init_driver(&ohci_omap_hc_driver, &omap_overrides);
505 return platform_driver_register(&ohci_hcd_omap_driver);
506}
507module_init(ohci_omap_init);
508
509static void __exit ohci_omap_cleanup(void)
510{
511 platform_driver_unregister(&ohci_hcd_omap_driver);
512}
513module_exit(ohci_omap_cleanup);
514
515MODULE_DESCRIPTION(DRIVER_DESC);
516MODULE_ALIAS("platform:ohci");
517MODULE_LICENSE("GPL");