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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/platform_data/usb-omap1.h>
29#include <linux/soc/ti/omap1-usb.h>
30#include <linux/soc/ti/omap1-mux.h>
31#include <linux/soc/ti/omap1-soc.h>
32#include <linux/soc/ti/omap1-io.h>
33#include <linux/signal.h>
34#include <linux/usb.h>
35#include <linux/usb/hcd.h>
36
37#include "ohci.h"
38
39#include <asm/io.h>
40#include <asm/mach-types.h>
41
42#define DRIVER_DESC "OHCI OMAP driver"
43
44struct ohci_omap_priv {
45 struct clk *usb_host_ck;
46 struct clk *usb_dc_ck;
47 struct gpio_desc *power;
48 struct gpio_desc *overcurrent;
49};
50
51static const char hcd_name[] = "ohci-omap";
52static struct hc_driver __read_mostly ohci_omap_hc_driver;
53
54#define hcd_to_ohci_omap_priv(h) \
55 ((struct ohci_omap_priv *)hcd_to_ohci(h)->priv)
56
57static void omap_ohci_clock_power(struct ohci_omap_priv *priv, int on)
58{
59 if (on) {
60 clk_enable(priv->usb_dc_ck);
61 clk_enable(priv->usb_host_ck);
62 /* guesstimate for T5 == 1x 32K clock + APLL lock time */
63 udelay(100);
64 } else {
65 clk_disable(priv->usb_host_ck);
66 clk_disable(priv->usb_dc_ck);
67 }
68}
69
70static void start_hnp(struct ohci_hcd *ohci)
71{
72 struct usb_hcd *hcd = ohci_to_hcd(ohci);
73 const unsigned port = hcd->self.otg_port - 1;
74 unsigned long flags;
75 u32 l;
76
77 otg_start_hnp(hcd->usb_phy->otg);
78
79 local_irq_save(flags);
80 hcd->usb_phy->otg->state = OTG_STATE_A_SUSPEND;
81 writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]);
82 l = omap_readl(OTG_CTRL);
83 l &= ~OTG_A_BUSREQ;
84 omap_writel(l, OTG_CTRL);
85 local_irq_restore(flags);
86}
87
88/*-------------------------------------------------------------------------*/
89
90static int ohci_omap_reset(struct usb_hcd *hcd)
91{
92 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
93 struct omap_usb_config *config = dev_get_platdata(hcd->self.controller);
94 struct ohci_omap_priv *priv = hcd_to_ohci_omap_priv(hcd);
95 int need_transceiver = (config->otg != 0);
96 int ret;
97
98 dev_dbg(hcd->self.controller, "starting USB Controller\n");
99
100 if (config->otg) {
101 hcd->self.otg_port = config->otg;
102 /* default/minimum OTG power budget: 8 mA */
103 hcd->power_budget = 8;
104 }
105
106 /* XXX OMAP16xx only */
107 if (config->ocpi_enable)
108 config->ocpi_enable();
109
110 if (IS_ENABLED(CONFIG_USB_OTG) && need_transceiver) {
111 hcd->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
112 if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
113 int status = otg_set_host(hcd->usb_phy->otg,
114 &ohci_to_hcd(ohci)->self);
115 dev_dbg(hcd->self.controller, "init %s phy, status %d\n",
116 hcd->usb_phy->label, status);
117 if (status) {
118 usb_put_phy(hcd->usb_phy);
119 return status;
120 }
121 } else {
122 return -EPROBE_DEFER;
123 }
124 hcd->skip_phy_initialization = 1;
125 ohci->start_hnp = start_hnp;
126 }
127
128 omap_ohci_clock_power(priv, 1);
129
130 if (config->lb_reset)
131 config->lb_reset();
132
133 ret = ohci_setup(hcd);
134 if (ret < 0)
135 return ret;
136
137 if (config->otg || config->rwc) {
138 ohci->hc_control = OHCI_CTRL_RWC;
139 writel(OHCI_CTRL_RWC, &ohci->regs->control);
140 }
141
142 /* board-specific power switching and overcurrent support */
143 if (machine_is_omap_osk()) {
144 u32 rh = roothub_a (ohci);
145
146 /* power switching (ganged by default) */
147 rh &= ~RH_A_NPS;
148
149 /* TPS2045 switch for internal transceiver (port 1) */
150 if (machine_is_omap_osk()) {
151 ohci_to_hcd(ohci)->power_budget = 250;
152
153 rh &= ~RH_A_NOCP;
154
155 /* gpio9 for overcurrent detction */
156 omap_cfg_reg(W8_1610_GPIO9);
157
158 /* for paranoia's sake: disable USB.PUEN */
159 omap_cfg_reg(W4_USB_HIGHZ);
160 }
161 ohci_writel(ohci, rh, &ohci->regs->roothub.a);
162 ohci->flags &= ~OHCI_QUIRK_HUB_POWER;
163 } else if (machine_is_nokia770()) {
164 /* We require a self-powered hub, which should have
165 * plenty of power. */
166 ohci_to_hcd(ohci)->power_budget = 0;
167 }
168
169 /* FIXME hub_wq hub requests should manage power switching */
170 if (config->transceiver_power)
171 return config->transceiver_power(1);
172
173 if (priv->power)
174 gpiod_set_value_cansleep(priv->power, 0);
175
176 /* board init will have already handled HMC and mux setup.
177 * any external transceiver should already be initialized
178 * too, so all configured ports use the right signaling now.
179 */
180
181 return 0;
182}
183
184/*-------------------------------------------------------------------------*/
185
186/**
187 * ohci_hcd_omap_probe - initialize OMAP-based HCDs
188 * @pdev: USB controller to probe
189 *
190 * Context: task context, might sleep
191 *
192 * Allocates basic resources for this USB host controller, and
193 * then invokes the start() method for the HCD associated with it
194 * through the hotplug entry's driver_data.
195 */
196static int ohci_hcd_omap_probe(struct platform_device *pdev)
197{
198 int retval, irq;
199 struct usb_hcd *hcd = 0;
200 struct ohci_omap_priv *priv;
201
202 if (pdev->num_resources != 2) {
203 dev_err(&pdev->dev, "invalid num_resources: %i\n",
204 pdev->num_resources);
205 return -ENODEV;
206 }
207
208 if (pdev->resource[0].flags != IORESOURCE_MEM
209 || pdev->resource[1].flags != IORESOURCE_IRQ) {
210 dev_err(&pdev->dev, "invalid resource type\n");
211 return -ENODEV;
212 }
213
214 hcd = usb_create_hcd(&ohci_omap_hc_driver, &pdev->dev,
215 dev_name(&pdev->dev));
216 if (!hcd)
217 return -ENOMEM;
218
219 hcd->rsrc_start = pdev->resource[0].start;
220 hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
221 priv = hcd_to_ohci_omap_priv(hcd);
222
223 /* Obtain two optional GPIO lines */
224 priv->power = devm_gpiod_get_optional(&pdev->dev, "power", GPIOD_ASIS);
225 if (IS_ERR(priv->power)) {
226 retval = PTR_ERR(priv->power);
227 goto err_put_hcd;
228 }
229 if (priv->power)
230 gpiod_set_consumer_name(priv->power, "OHCI power");
231
232 /*
233 * This "overcurrent" GPIO line isn't really used in the code,
234 * but has a designated hardware function.
235 * TODO: implement proper overcurrent handling.
236 */
237 priv->overcurrent = devm_gpiod_get_optional(&pdev->dev, "overcurrent",
238 GPIOD_IN);
239 if (IS_ERR(priv->overcurrent)) {
240 retval = PTR_ERR(priv->overcurrent);
241 goto err_put_hcd;
242 }
243 if (priv->overcurrent)
244 gpiod_set_consumer_name(priv->overcurrent, "OHCI overcurrent");
245
246 priv->usb_host_ck = clk_get(&pdev->dev, "usb_hhc_ck");
247 if (IS_ERR(priv->usb_host_ck)) {
248 retval = PTR_ERR(priv->usb_host_ck);
249 goto err_put_hcd;
250 }
251
252 retval = clk_prepare(priv->usb_host_ck);
253 if (retval)
254 goto err_put_host_ck;
255
256 if (!cpu_is_omap15xx())
257 priv->usb_dc_ck = clk_get(&pdev->dev, "usb_dc_ck");
258 else
259 priv->usb_dc_ck = clk_get(&pdev->dev, "lb_ck");
260
261 if (IS_ERR(priv->usb_dc_ck)) {
262 retval = PTR_ERR(priv->usb_dc_ck);
263 goto err_unprepare_host_ck;
264 }
265
266 retval = clk_prepare(priv->usb_dc_ck);
267 if (retval)
268 goto err_put_dc_ck;
269
270 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
271 dev_dbg(&pdev->dev, "request_mem_region failed\n");
272 retval = -EBUSY;
273 goto err_unprepare_dc_ck;
274 }
275
276 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
277 if (!hcd->regs) {
278 dev_err(&pdev->dev, "can't ioremap OHCI HCD\n");
279 retval = -ENOMEM;
280 goto err2;
281 }
282
283 irq = platform_get_irq(pdev, 0);
284 if (irq < 0) {
285 retval = irq;
286 goto err3;
287 }
288 retval = usb_add_hcd(hcd, irq, 0);
289 if (retval)
290 goto err3;
291
292 device_wakeup_enable(hcd->self.controller);
293 return 0;
294err3:
295 iounmap(hcd->regs);
296err2:
297 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
298err_unprepare_dc_ck:
299 clk_unprepare(priv->usb_dc_ck);
300err_put_dc_ck:
301 clk_put(priv->usb_dc_ck);
302err_unprepare_host_ck:
303 clk_unprepare(priv->usb_host_ck);
304err_put_host_ck:
305 clk_put(priv->usb_host_ck);
306err_put_hcd:
307 usb_put_hcd(hcd);
308 return retval;
309}
310
311
312/* may be called with controller, bus, and devices active */
313
314/**
315 * ohci_hcd_omap_remove - shutdown processing for OMAP-based HCDs
316 * @pdev: USB Host Controller being removed
317 *
318 * Context: task context, might sleep
319 *
320 * Reverses the effect of ohci_hcd_omap_probe(), first invoking
321 * the HCD's stop() method. It is always called from a thread
322 * context, normally "rmmod", "apmd", or something similar.
323 */
324static void ohci_hcd_omap_remove(struct platform_device *pdev)
325{
326 struct usb_hcd *hcd = platform_get_drvdata(pdev);
327 struct ohci_omap_priv *priv = hcd_to_ohci_omap_priv(hcd);
328
329 dev_dbg(hcd->self.controller, "stopping USB Controller\n");
330 usb_remove_hcd(hcd);
331 omap_ohci_clock_power(priv, 0);
332 if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
333 (void) otg_set_host(hcd->usb_phy->otg, 0);
334 usb_put_phy(hcd->usb_phy);
335 }
336 iounmap(hcd->regs);
337 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
338 clk_unprepare(priv->usb_dc_ck);
339 clk_put(priv->usb_dc_ck);
340 clk_unprepare(priv->usb_host_ck);
341 clk_put(priv->usb_host_ck);
342 usb_put_hcd(hcd);
343}
344
345/*-------------------------------------------------------------------------*/
346
347#ifdef CONFIG_PM
348
349static int ohci_omap_suspend(struct platform_device *pdev, pm_message_t message)
350{
351 struct usb_hcd *hcd = platform_get_drvdata(pdev);
352 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
353 struct ohci_omap_priv *priv = hcd_to_ohci_omap_priv(hcd);
354 bool do_wakeup = device_may_wakeup(&pdev->dev);
355 int ret;
356
357 if (time_before(jiffies, ohci->next_statechange))
358 msleep(5);
359 ohci->next_statechange = jiffies;
360
361 ret = ohci_suspend(hcd, do_wakeup);
362 if (ret)
363 return ret;
364
365 omap_ohci_clock_power(priv, 0);
366 return ret;
367}
368
369static int ohci_omap_resume(struct platform_device *dev)
370{
371 struct usb_hcd *hcd = platform_get_drvdata(dev);
372 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
373 struct ohci_omap_priv *priv = hcd_to_ohci_omap_priv(hcd);
374
375 if (time_before(jiffies, ohci->next_statechange))
376 msleep(5);
377 ohci->next_statechange = jiffies;
378
379 omap_ohci_clock_power(priv, 1);
380 ohci_resume(hcd, false);
381 return 0;
382}
383
384#endif
385
386/*-------------------------------------------------------------------------*/
387
388/*
389 * Driver definition to register with the OMAP bus
390 */
391static struct platform_driver ohci_hcd_omap_driver = {
392 .probe = ohci_hcd_omap_probe,
393 .remove_new = ohci_hcd_omap_remove,
394 .shutdown = usb_hcd_platform_shutdown,
395#ifdef CONFIG_PM
396 .suspend = ohci_omap_suspend,
397 .resume = ohci_omap_resume,
398#endif
399 .driver = {
400 .name = "ohci",
401 },
402};
403
404static const struct ohci_driver_overrides omap_overrides __initconst = {
405 .product_desc = "OMAP OHCI",
406 .reset = ohci_omap_reset,
407 .extra_priv_size = sizeof(struct ohci_omap_priv),
408};
409
410static int __init ohci_omap_init(void)
411{
412 if (usb_disabled())
413 return -ENODEV;
414
415 ohci_init_driver(&ohci_omap_hc_driver, &omap_overrides);
416 return platform_driver_register(&ohci_hcd_omap_driver);
417}
418module_init(ohci_omap_init);
419
420static void __exit ohci_omap_cleanup(void)
421{
422 platform_driver_unregister(&ohci_hcd_omap_driver);
423}
424module_exit(ohci_omap_cleanup);
425
426MODULE_DESCRIPTION(DRIVER_DESC);
427MODULE_ALIAS("platform:ohci");
428MODULE_LICENSE("GPL");