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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/clk.h>
18#include <linux/dma-mapping.h>
19#include <linux/err.h>
20#include <linux/gpio.h>
21#include <linux/io.h>
22#include <linux/jiffies.h>
23#include <linux/kernel.h>
24#include <linux/module.h>
25#include <linux/usb/otg.h>
26#include <linux/platform_device.h>
27#include <linux/signal.h>
28#include <linux/usb.h>
29#include <linux/usb/hcd.h>
30
31#include "ohci.h"
32
33#include <asm/io.h>
34#include <asm/mach-types.h>
35
36#include <mach/mux.h>
37
38#include <mach/hardware.h>
39#include <mach/irqs.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
56#ifdef CONFIG_TPS65010
57#include <linux/i2c/tps65010.h>
58#else
59
60#define LOW 0
61#define HIGH 1
62
63#define GPIO1 1
64
65static inline int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
66{
67 return 0;
68}
69
70#endif
71
72extern int usb_disabled(void);
73extern int ocpi_enable(void);
74
75static struct clk *usb_host_ck;
76static struct clk *usb_dc_ck;
77
78static const char hcd_name[] = "ohci-omap";
79static struct hc_driver __read_mostly ohci_omap_hc_driver;
80
81static void omap_ohci_clock_power(int on)
82{
83 if (on) {
84 clk_enable(usb_dc_ck);
85 clk_enable(usb_host_ck);
86 /* guesstimate for T5 == 1x 32K clock + APLL lock time */
87 udelay(100);
88 } else {
89 clk_disable(usb_host_ck);
90 clk_disable(usb_dc_ck);
91 }
92}
93
94/*
95 * Board specific gang-switched transceiver power on/off.
96 * NOTE: OSK supplies power from DC, not battery.
97 */
98static int omap_ohci_transceiver_power(int on)
99{
100 if (on) {
101 if (machine_is_omap_innovator() && cpu_is_omap1510())
102 __raw_writeb(__raw_readb(INNOVATOR_FPGA_CAM_USB_CONTROL)
103 | ((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
104 INNOVATOR_FPGA_CAM_USB_CONTROL);
105 else if (machine_is_omap_osk())
106 tps65010_set_gpio_out_value(GPIO1, LOW);
107 } else {
108 if (machine_is_omap_innovator() && cpu_is_omap1510())
109 __raw_writeb(__raw_readb(INNOVATOR_FPGA_CAM_USB_CONTROL)
110 & ~((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
111 INNOVATOR_FPGA_CAM_USB_CONTROL);
112 else if (machine_is_omap_osk())
113 tps65010_set_gpio_out_value(GPIO1, HIGH);
114 }
115
116 return 0;
117}
118
119#ifdef CONFIG_ARCH_OMAP15XX
120/*
121 * OMAP-1510 specific Local Bus clock on/off
122 */
123static int omap_1510_local_bus_power(int on)
124{
125 if (on) {
126 omap_writel((1 << 1) | (1 << 0), OMAP1510_LB_MMU_CTL);
127 udelay(200);
128 } else {
129 omap_writel(0, OMAP1510_LB_MMU_CTL);
130 }
131
132 return 0;
133}
134
135/*
136 * OMAP-1510 specific Local Bus initialization
137 * NOTE: This assumes 32MB memory size in OMAP1510LB_MEMSIZE.
138 * See also arch/mach-omap/memory.h for __virt_to_dma() and
139 * __dma_to_virt() which need to match with the physical
140 * Local Bus address below.
141 */
142static int omap_1510_local_bus_init(void)
143{
144 unsigned int tlb;
145 unsigned long lbaddr, physaddr;
146
147 omap_writel((omap_readl(OMAP1510_LB_CLOCK_DIV) & 0xfffffff8) | 0x4,
148 OMAP1510_LB_CLOCK_DIV);
149
150 /* Configure the Local Bus MMU table */
151 for (tlb = 0; tlb < OMAP1510_LB_MEMSIZE; tlb++) {
152 lbaddr = tlb * 0x00100000 + OMAP1510_LB_OFFSET;
153 physaddr = tlb * 0x00100000 + PHYS_OFFSET;
154 omap_writel((lbaddr & 0x0fffffff) >> 22, OMAP1510_LB_MMU_CAM_H);
155 omap_writel(((lbaddr & 0x003ffc00) >> 6) | 0xc,
156 OMAP1510_LB_MMU_CAM_L);
157 omap_writel(physaddr >> 16, OMAP1510_LB_MMU_RAM_H);
158 omap_writel((physaddr & 0x0000fc00) | 0x300, OMAP1510_LB_MMU_RAM_L);
159 omap_writel(tlb << 4, OMAP1510_LB_MMU_LCK);
160 omap_writel(0x1, OMAP1510_LB_MMU_LD_TLB);
161 }
162
163 /* Enable the walking table */
164 omap_writel(omap_readl(OMAP1510_LB_MMU_CTL) | (1 << 3), OMAP1510_LB_MMU_CTL);
165 udelay(200);
166
167 return 0;
168}
169#else
170#define omap_1510_local_bus_power(x) {}
171#define omap_1510_local_bus_init() {}
172#endif
173
174#ifdef CONFIG_USB_OTG
175
176static void start_hnp(struct ohci_hcd *ohci)
177{
178 struct usb_hcd *hcd = ohci_to_hcd(ohci);
179 const unsigned port = hcd->self.otg_port - 1;
180 unsigned long flags;
181 u32 l;
182
183 otg_start_hnp(hcd->usb_phy->otg);
184
185 local_irq_save(flags);
186 hcd->usb_phy->otg->state = OTG_STATE_A_SUSPEND;
187 writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]);
188 l = omap_readl(OTG_CTRL);
189 l &= ~OTG_A_BUSREQ;
190 omap_writel(l, OTG_CTRL);
191 local_irq_restore(flags);
192}
193
194#endif
195
196/*-------------------------------------------------------------------------*/
197
198static int ohci_omap_reset(struct usb_hcd *hcd)
199{
200 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
201 struct omap_usb_config *config = dev_get_platdata(hcd->self.controller);
202 int need_transceiver = (config->otg != 0);
203 int ret;
204
205 dev_dbg(hcd->self.controller, "starting USB Controller\n");
206
207 if (config->otg) {
208 hcd->self.otg_port = config->otg;
209 /* default/minimum OTG power budget: 8 mA */
210 hcd->power_budget = 8;
211 }
212
213 /* boards can use OTG transceivers in non-OTG modes */
214 need_transceiver = need_transceiver
215 || machine_is_omap_h2() || machine_is_omap_h3();
216
217 /* XXX OMAP16xx only */
218 if (config->ocpi_enable)
219 config->ocpi_enable();
220
221#ifdef CONFIG_USB_OTG
222 if (need_transceiver) {
223 hcd->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
224 if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
225 int status = otg_set_host(hcd->usb_phy->otg,
226 &ohci_to_hcd(ohci)->self);
227 dev_dbg(hcd->self.controller, "init %s phy, status %d\n",
228 hcd->usb_phy->label, status);
229 if (status) {
230 usb_put_phy(hcd->usb_phy);
231 return status;
232 }
233 } else {
234 dev_err(hcd->self.controller, "can't find phy\n");
235 return -ENODEV;
236 }
237 ohci->start_hnp = start_hnp;
238 }
239#endif
240
241 omap_ohci_clock_power(1);
242
243 if (cpu_is_omap15xx()) {
244 omap_1510_local_bus_power(1);
245 omap_1510_local_bus_init();
246 }
247
248 ret = ohci_setup(hcd);
249 if (ret < 0)
250 return ret;
251
252 if (config->otg || config->rwc) {
253 ohci->hc_control = OHCI_CTRL_RWC;
254 writel(OHCI_CTRL_RWC, &ohci->regs->control);
255 }
256
257 /* board-specific power switching and overcurrent support */
258 if (machine_is_omap_osk() || machine_is_omap_innovator()) {
259 u32 rh = roothub_a (ohci);
260
261 /* power switching (ganged by default) */
262 rh &= ~RH_A_NPS;
263
264 /* TPS2045 switch for internal transceiver (port 1) */
265 if (machine_is_omap_osk()) {
266 ohci_to_hcd(ohci)->power_budget = 250;
267
268 rh &= ~RH_A_NOCP;
269
270 /* gpio9 for overcurrent detction */
271 omap_cfg_reg(W8_1610_GPIO9);
272 gpio_request(9, "OHCI overcurrent");
273 gpio_direction_input(9);
274
275 /* for paranoia's sake: disable USB.PUEN */
276 omap_cfg_reg(W4_USB_HIGHZ);
277 }
278 ohci_writel(ohci, rh, &ohci->regs->roothub.a);
279 ohci->flags &= ~OHCI_QUIRK_HUB_POWER;
280 } else if (machine_is_nokia770()) {
281 /* We require a self-powered hub, which should have
282 * plenty of power. */
283 ohci_to_hcd(ohci)->power_budget = 0;
284 }
285
286 /* FIXME hub_wq hub requests should manage power switching */
287 omap_ohci_transceiver_power(1);
288
289 /* board init will have already handled HMC and mux setup.
290 * any external transceiver should already be initialized
291 * too, so all configured ports use the right signaling now.
292 */
293
294 return 0;
295}
296
297/*-------------------------------------------------------------------------*/
298
299/**
300 * usb_hcd_omap_probe - initialize OMAP-based HCDs
301 * Context: !in_interrupt()
302 *
303 * Allocates basic resources for this USB host controller, and
304 * then invokes the start() method for the HCD associated with it
305 * through the hotplug entry's driver_data.
306 */
307static int usb_hcd_omap_probe (const struct hc_driver *driver,
308 struct platform_device *pdev)
309{
310 int retval, irq;
311 struct usb_hcd *hcd = 0;
312
313 if (pdev->num_resources != 2) {
314 dev_err(&pdev->dev, "invalid num_resources: %i\n",
315 pdev->num_resources);
316 return -ENODEV;
317 }
318
319 if (pdev->resource[0].flags != IORESOURCE_MEM
320 || pdev->resource[1].flags != IORESOURCE_IRQ) {
321 dev_err(&pdev->dev, "invalid resource type\n");
322 return -ENODEV;
323 }
324
325 usb_host_ck = clk_get(&pdev->dev, "usb_hhc_ck");
326 if (IS_ERR(usb_host_ck))
327 return PTR_ERR(usb_host_ck);
328
329 if (!cpu_is_omap15xx())
330 usb_dc_ck = clk_get(&pdev->dev, "usb_dc_ck");
331 else
332 usb_dc_ck = clk_get(&pdev->dev, "lb_ck");
333
334 if (IS_ERR(usb_dc_ck)) {
335 clk_put(usb_host_ck);
336 return PTR_ERR(usb_dc_ck);
337 }
338
339
340 hcd = usb_create_hcd (driver, &pdev->dev, dev_name(&pdev->dev));
341 if (!hcd) {
342 retval = -ENOMEM;
343 goto err0;
344 }
345 hcd->rsrc_start = pdev->resource[0].start;
346 hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
347
348 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
349 dev_dbg(&pdev->dev, "request_mem_region failed\n");
350 retval = -EBUSY;
351 goto err1;
352 }
353
354 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
355 if (!hcd->regs) {
356 dev_err(&pdev->dev, "can't ioremap OHCI HCD\n");
357 retval = -ENOMEM;
358 goto err2;
359 }
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, 0);
367 if (retval)
368 goto err3;
369
370 device_wakeup_enable(hcd->self.controller);
371 return 0;
372err3:
373 iounmap(hcd->regs);
374err2:
375 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
376err1:
377 usb_put_hcd(hcd);
378err0:
379 clk_put(usb_dc_ck);
380 clk_put(usb_host_ck);
381 return retval;
382}
383
384
385/* may be called with controller, bus, and devices active */
386
387/**
388 * usb_hcd_omap_remove - shutdown processing for OMAP-based HCDs
389 * @dev: USB Host Controller being removed
390 * Context: !in_interrupt()
391 *
392 * Reverses the effect of usb_hcd_omap_probe(), first invoking
393 * the HCD's stop() method. It is always called from a thread
394 * context, normally "rmmod", "apmd", or something similar.
395 */
396static inline void
397usb_hcd_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev)
398{
399 dev_dbg(hcd->self.controller, "stopping USB Controller\n");
400 usb_remove_hcd(hcd);
401 omap_ohci_clock_power(0);
402 if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
403 (void) otg_set_host(hcd->usb_phy->otg, 0);
404 usb_put_phy(hcd->usb_phy);
405 }
406 if (machine_is_omap_osk())
407 gpio_free(9);
408 iounmap(hcd->regs);
409 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
410 usb_put_hcd(hcd);
411 clk_put(usb_dc_ck);
412 clk_put(usb_host_ck);
413}
414
415/*-------------------------------------------------------------------------*/
416
417static int ohci_hcd_omap_drv_probe(struct platform_device *dev)
418{
419 return usb_hcd_omap_probe(&ohci_omap_hc_driver, dev);
420}
421
422static int ohci_hcd_omap_drv_remove(struct platform_device *dev)
423{
424 struct usb_hcd *hcd = platform_get_drvdata(dev);
425
426 usb_hcd_omap_remove(hcd, dev);
427
428 return 0;
429}
430
431/*-------------------------------------------------------------------------*/
432
433#ifdef CONFIG_PM
434
435static int ohci_omap_suspend(struct platform_device *pdev, pm_message_t message)
436{
437 struct usb_hcd *hcd = platform_get_drvdata(pdev);
438 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
439 bool do_wakeup = device_may_wakeup(&pdev->dev);
440 int ret;
441
442 if (time_before(jiffies, ohci->next_statechange))
443 msleep(5);
444 ohci->next_statechange = jiffies;
445
446 ret = ohci_suspend(hcd, do_wakeup);
447 if (ret)
448 return ret;
449
450 omap_ohci_clock_power(0);
451 return ret;
452}
453
454static int ohci_omap_resume(struct platform_device *dev)
455{
456 struct usb_hcd *hcd = platform_get_drvdata(dev);
457 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
458
459 if (time_before(jiffies, ohci->next_statechange))
460 msleep(5);
461 ohci->next_statechange = jiffies;
462
463 omap_ohci_clock_power(1);
464 ohci_resume(hcd, false);
465 return 0;
466}
467
468#endif
469
470/*-------------------------------------------------------------------------*/
471
472/*
473 * Driver definition to register with the OMAP bus
474 */
475static struct platform_driver ohci_hcd_omap_driver = {
476 .probe = ohci_hcd_omap_drv_probe,
477 .remove = ohci_hcd_omap_drv_remove,
478 .shutdown = usb_hcd_platform_shutdown,
479#ifdef CONFIG_PM
480 .suspend = ohci_omap_suspend,
481 .resume = ohci_omap_resume,
482#endif
483 .driver = {
484 .name = "ohci",
485 },
486};
487
488static const struct ohci_driver_overrides omap_overrides __initconst = {
489 .product_desc = "OMAP OHCI",
490 .reset = ohci_omap_reset
491};
492
493static int __init ohci_omap_init(void)
494{
495 if (usb_disabled())
496 return -ENODEV;
497
498 pr_info("%s: " DRIVER_DESC "\n", hcd_name);
499
500 ohci_init_driver(&ohci_omap_hc_driver, &omap_overrides);
501 return platform_driver_register(&ohci_hcd_omap_driver);
502}
503module_init(ohci_omap_init);
504
505static void __exit ohci_omap_cleanup(void)
506{
507 platform_driver_unregister(&ohci_hcd_omap_driver);
508}
509module_exit(ohci_omap_cleanup);
510
511MODULE_DESCRIPTION(DRIVER_DESC);
512MODULE_ALIAS("platform:ohci");
513MODULE_LICENSE("GPL");
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");