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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.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
56#ifdef CONFIG_TPS65010
57#include <linux/mfd/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
72static struct clk *usb_host_ck;
73static struct clk *usb_dc_ck;
74
75static const char hcd_name[] = "ohci-omap";
76static struct hc_driver __read_mostly ohci_omap_hc_driver;
77
78static void omap_ohci_clock_power(int on)
79{
80 if (on) {
81 clk_enable(usb_dc_ck);
82 clk_enable(usb_host_ck);
83 /* guesstimate for T5 == 1x 32K clock + APLL lock time */
84 udelay(100);
85 } else {
86 clk_disable(usb_host_ck);
87 clk_disable(usb_dc_ck);
88 }
89}
90
91/*
92 * Board specific gang-switched transceiver power on/off.
93 * NOTE: OSK supplies power from DC, not battery.
94 */
95static int omap_ohci_transceiver_power(int on)
96{
97 if (on) {
98 if (machine_is_omap_innovator() && cpu_is_omap1510())
99 __raw_writeb(__raw_readb(INNOVATOR_FPGA_CAM_USB_CONTROL)
100 | ((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
101 INNOVATOR_FPGA_CAM_USB_CONTROL);
102 else if (machine_is_omap_osk())
103 tps65010_set_gpio_out_value(GPIO1, LOW);
104 } else {
105 if (machine_is_omap_innovator() && cpu_is_omap1510())
106 __raw_writeb(__raw_readb(INNOVATOR_FPGA_CAM_USB_CONTROL)
107 & ~((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
108 INNOVATOR_FPGA_CAM_USB_CONTROL);
109 else if (machine_is_omap_osk())
110 tps65010_set_gpio_out_value(GPIO1, HIGH);
111 }
112
113 return 0;
114}
115
116#ifdef CONFIG_ARCH_OMAP15XX
117/*
118 * OMAP-1510 specific Local Bus clock on/off
119 */
120static int omap_1510_local_bus_power(int on)
121{
122 if (on) {
123 omap_writel((1 << 1) | (1 << 0), OMAP1510_LB_MMU_CTL);
124 udelay(200);
125 } else {
126 omap_writel(0, OMAP1510_LB_MMU_CTL);
127 }
128
129 return 0;
130}
131
132/*
133 * OMAP-1510 specific Local Bus initialization
134 * NOTE: This assumes 32MB memory size in OMAP1510LB_MEMSIZE.
135 * See also arch/mach-omap/memory.h for __virt_to_dma() and
136 * __dma_to_virt() which need to match with the physical
137 * Local Bus address below.
138 */
139static int omap_1510_local_bus_init(void)
140{
141 unsigned int tlb;
142 unsigned long lbaddr, physaddr;
143
144 omap_writel((omap_readl(OMAP1510_LB_CLOCK_DIV) & 0xfffffff8) | 0x4,
145 OMAP1510_LB_CLOCK_DIV);
146
147 /* Configure the Local Bus MMU table */
148 for (tlb = 0; tlb < OMAP1510_LB_MEMSIZE; tlb++) {
149 lbaddr = tlb * 0x00100000 + OMAP1510_LB_OFFSET;
150 physaddr = tlb * 0x00100000 + PHYS_OFFSET;
151 omap_writel((lbaddr & 0x0fffffff) >> 22, OMAP1510_LB_MMU_CAM_H);
152 omap_writel(((lbaddr & 0x003ffc00) >> 6) | 0xc,
153 OMAP1510_LB_MMU_CAM_L);
154 omap_writel(physaddr >> 16, OMAP1510_LB_MMU_RAM_H);
155 omap_writel((physaddr & 0x0000fc00) | 0x300, OMAP1510_LB_MMU_RAM_L);
156 omap_writel(tlb << 4, OMAP1510_LB_MMU_LCK);
157 omap_writel(0x1, OMAP1510_LB_MMU_LD_TLB);
158 }
159
160 /* Enable the walking table */
161 omap_writel(omap_readl(OMAP1510_LB_MMU_CTL) | (1 << 3), OMAP1510_LB_MMU_CTL);
162 udelay(200);
163
164 return 0;
165}
166#else
167#define omap_1510_local_bus_power(x) {}
168#define omap_1510_local_bus_init() {}
169#endif
170
171#ifdef CONFIG_USB_OTG
172
173static void start_hnp(struct ohci_hcd *ohci)
174{
175 struct usb_hcd *hcd = ohci_to_hcd(ohci);
176 const unsigned port = hcd->self.otg_port - 1;
177 unsigned long flags;
178 u32 l;
179
180 otg_start_hnp(hcd->usb_phy->otg);
181
182 local_irq_save(flags);
183 hcd->usb_phy->otg->state = OTG_STATE_A_SUSPEND;
184 writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]);
185 l = omap_readl(OTG_CTRL);
186 l &= ~OTG_A_BUSREQ;
187 omap_writel(l, OTG_CTRL);
188 local_irq_restore(flags);
189}
190
191#endif
192
193/*-------------------------------------------------------------------------*/
194
195static int ohci_omap_reset(struct usb_hcd *hcd)
196{
197 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
198 struct omap_usb_config *config = dev_get_platdata(hcd->self.controller);
199 int need_transceiver = (config->otg != 0);
200 int ret;
201
202 dev_dbg(hcd->self.controller, "starting USB Controller\n");
203
204 if (config->otg) {
205 hcd->self.otg_port = config->otg;
206 /* default/minimum OTG power budget: 8 mA */
207 hcd->power_budget = 8;
208 }
209
210 /* boards can use OTG transceivers in non-OTG modes */
211 need_transceiver = need_transceiver
212 || machine_is_omap_h2() || machine_is_omap_h3();
213
214 /* XXX OMAP16xx only */
215 if (config->ocpi_enable)
216 config->ocpi_enable();
217
218#ifdef CONFIG_USB_OTG
219 if (need_transceiver) {
220 hcd->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
221 if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
222 int status = otg_set_host(hcd->usb_phy->otg,
223 &ohci_to_hcd(ohci)->self);
224 dev_dbg(hcd->self.controller, "init %s phy, status %d\n",
225 hcd->usb_phy->label, status);
226 if (status) {
227 usb_put_phy(hcd->usb_phy);
228 return status;
229 }
230 } else {
231 return -EPROBE_DEFER;
232 }
233 hcd->skip_phy_initialization = 1;
234 ohci->start_hnp = start_hnp;
235 }
236#endif
237
238 omap_ohci_clock_power(1);
239
240 if (cpu_is_omap15xx()) {
241 omap_1510_local_bus_power(1);
242 omap_1510_local_bus_init();
243 }
244
245 ret = ohci_setup(hcd);
246 if (ret < 0)
247 return ret;
248
249 if (config->otg || config->rwc) {
250 ohci->hc_control = OHCI_CTRL_RWC;
251 writel(OHCI_CTRL_RWC, &ohci->regs->control);
252 }
253
254 /* board-specific power switching and overcurrent support */
255 if (machine_is_omap_osk() || machine_is_omap_innovator()) {
256 u32 rh = roothub_a (ohci);
257
258 /* power switching (ganged by default) */
259 rh &= ~RH_A_NPS;
260
261 /* TPS2045 switch for internal transceiver (port 1) */
262 if (machine_is_omap_osk()) {
263 ohci_to_hcd(ohci)->power_budget = 250;
264
265 rh &= ~RH_A_NOCP;
266
267 /* gpio9 for overcurrent detction */
268 omap_cfg_reg(W8_1610_GPIO9);
269 gpio_request(9, "OHCI overcurrent");
270 gpio_direction_input(9);
271
272 /* for paranoia's sake: disable USB.PUEN */
273 omap_cfg_reg(W4_USB_HIGHZ);
274 }
275 ohci_writel(ohci, rh, &ohci->regs->roothub.a);
276 ohci->flags &= ~OHCI_QUIRK_HUB_POWER;
277 } else if (machine_is_nokia770()) {
278 /* We require a self-powered hub, which should have
279 * plenty of power. */
280 ohci_to_hcd(ohci)->power_budget = 0;
281 }
282
283 /* FIXME hub_wq hub requests should manage power switching */
284 omap_ohci_transceiver_power(1);
285
286 /* board init will have already handled HMC and mux setup.
287 * any external transceiver should already be initialized
288 * too, so all configured ports use the right signaling now.
289 */
290
291 return 0;
292}
293
294/*-------------------------------------------------------------------------*/
295
296/**
297 * ohci_hcd_omap_probe - initialize OMAP-based HCDs
298 * Context: !in_interrupt()
299 *
300 * Allocates basic resources for this USB host controller, and
301 * then invokes the start() method for the HCD associated with it
302 * through the hotplug entry's driver_data.
303 */
304static int ohci_hcd_omap_probe(struct platform_device *pdev)
305{
306 int retval, irq;
307 struct usb_hcd *hcd = 0;
308
309 if (pdev->num_resources != 2) {
310 dev_err(&pdev->dev, "invalid num_resources: %i\n",
311 pdev->num_resources);
312 return -ENODEV;
313 }
314
315 if (pdev->resource[0].flags != IORESOURCE_MEM
316 || pdev->resource[1].flags != IORESOURCE_IRQ) {
317 dev_err(&pdev->dev, "invalid resource type\n");
318 return -ENODEV;
319 }
320
321 usb_host_ck = clk_get(&pdev->dev, "usb_hhc_ck");
322 if (IS_ERR(usb_host_ck))
323 return PTR_ERR(usb_host_ck);
324
325 if (!cpu_is_omap15xx())
326 usb_dc_ck = clk_get(&pdev->dev, "usb_dc_ck");
327 else
328 usb_dc_ck = clk_get(&pdev->dev, "lb_ck");
329
330 if (IS_ERR(usb_dc_ck)) {
331 clk_put(usb_host_ck);
332 return PTR_ERR(usb_dc_ck);
333 }
334
335
336 hcd = usb_create_hcd(&ohci_omap_hc_driver, &pdev->dev,
337 dev_name(&pdev->dev));
338 if (!hcd) {
339 retval = -ENOMEM;
340 goto err0;
341 }
342 hcd->rsrc_start = pdev->resource[0].start;
343 hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
344
345 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
346 dev_dbg(&pdev->dev, "request_mem_region failed\n");
347 retval = -EBUSY;
348 goto err1;
349 }
350
351 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
352 if (!hcd->regs) {
353 dev_err(&pdev->dev, "can't ioremap OHCI HCD\n");
354 retval = -ENOMEM;
355 goto err2;
356 }
357
358 irq = platform_get_irq(pdev, 0);
359 if (irq < 0) {
360 retval = -ENXIO;
361 goto err3;
362 }
363 retval = usb_add_hcd(hcd, irq, 0);
364 if (retval)
365 goto err3;
366
367 device_wakeup_enable(hcd->self.controller);
368 return 0;
369err3:
370 iounmap(hcd->regs);
371err2:
372 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
373err1:
374 usb_put_hcd(hcd);
375err0:
376 clk_put(usb_dc_ck);
377 clk_put(usb_host_ck);
378 return retval;
379}
380
381
382/* may be called with controller, bus, and devices active */
383
384/**
385 * ohci_hcd_omap_remove - shutdown processing for OMAP-based HCDs
386 * @dev: USB Host Controller being removed
387 * Context: !in_interrupt()
388 *
389 * Reverses the effect of ohci_hcd_omap_probe(), first invoking
390 * the HCD's stop() method. It is always called from a thread
391 * context, normally "rmmod", "apmd", or something similar.
392 */
393static int ohci_hcd_omap_remove(struct platform_device *pdev)
394{
395 struct usb_hcd *hcd = platform_get_drvdata(pdev);
396
397 dev_dbg(hcd->self.controller, "stopping USB Controller\n");
398 usb_remove_hcd(hcd);
399 omap_ohci_clock_power(0);
400 if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
401 (void) otg_set_host(hcd->usb_phy->otg, 0);
402 usb_put_phy(hcd->usb_phy);
403 }
404 if (machine_is_omap_osk())
405 gpio_free(9);
406 iounmap(hcd->regs);
407 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
408 usb_put_hcd(hcd);
409 clk_put(usb_dc_ck);
410 clk_put(usb_host_ck);
411 return 0;
412}
413
414/*-------------------------------------------------------------------------*/
415
416#ifdef CONFIG_PM
417
418static int ohci_omap_suspend(struct platform_device *pdev, pm_message_t message)
419{
420 struct usb_hcd *hcd = platform_get_drvdata(pdev);
421 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
422 bool do_wakeup = device_may_wakeup(&pdev->dev);
423 int ret;
424
425 if (time_before(jiffies, ohci->next_statechange))
426 msleep(5);
427 ohci->next_statechange = jiffies;
428
429 ret = ohci_suspend(hcd, do_wakeup);
430 if (ret)
431 return ret;
432
433 omap_ohci_clock_power(0);
434 return ret;
435}
436
437static int ohci_omap_resume(struct platform_device *dev)
438{
439 struct usb_hcd *hcd = platform_get_drvdata(dev);
440 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
441
442 if (time_before(jiffies, ohci->next_statechange))
443 msleep(5);
444 ohci->next_statechange = jiffies;
445
446 omap_ohci_clock_power(1);
447 ohci_resume(hcd, false);
448 return 0;
449}
450
451#endif
452
453/*-------------------------------------------------------------------------*/
454
455/*
456 * Driver definition to register with the OMAP bus
457 */
458static struct platform_driver ohci_hcd_omap_driver = {
459 .probe = ohci_hcd_omap_probe,
460 .remove = ohci_hcd_omap_remove,
461 .shutdown = usb_hcd_platform_shutdown,
462#ifdef CONFIG_PM
463 .suspend = ohci_omap_suspend,
464 .resume = ohci_omap_resume,
465#endif
466 .driver = {
467 .name = "ohci",
468 },
469};
470
471static const struct ohci_driver_overrides omap_overrides __initconst = {
472 .product_desc = "OMAP OHCI",
473 .reset = ohci_omap_reset
474};
475
476static int __init ohci_omap_init(void)
477{
478 if (usb_disabled())
479 return -ENODEV;
480
481 pr_info("%s: " DRIVER_DESC "\n", hcd_name);
482
483 ohci_init_driver(&ohci_omap_hc_driver, &omap_overrides);
484 return platform_driver_register(&ohci_hcd_omap_driver);
485}
486module_init(ohci_omap_init);
487
488static void __exit ohci_omap_cleanup(void)
489{
490 platform_driver_unregister(&ohci_hcd_omap_driver);
491}
492module_exit(ohci_omap_cleanup);
493
494MODULE_DESCRIPTION(DRIVER_DESC);
495MODULE_ALIAS("platform:ohci");
496MODULE_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.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
56#ifdef CONFIG_TPS65010
57#include <linux/mfd/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
72static struct clk *usb_host_ck;
73static struct clk *usb_dc_ck;
74
75static const char hcd_name[] = "ohci-omap";
76static struct hc_driver __read_mostly ohci_omap_hc_driver;
77
78static void omap_ohci_clock_power(int on)
79{
80 if (on) {
81 clk_enable(usb_dc_ck);
82 clk_enable(usb_host_ck);
83 /* guesstimate for T5 == 1x 32K clock + APLL lock time */
84 udelay(100);
85 } else {
86 clk_disable(usb_host_ck);
87 clk_disable(usb_dc_ck);
88 }
89}
90
91/*
92 * Board specific gang-switched transceiver power on/off.
93 * NOTE: OSK supplies power from DC, not battery.
94 */
95static int omap_ohci_transceiver_power(int on)
96{
97 if (on) {
98 if (machine_is_omap_innovator() && cpu_is_omap1510())
99 __raw_writeb(__raw_readb(INNOVATOR_FPGA_CAM_USB_CONTROL)
100 | ((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
101 INNOVATOR_FPGA_CAM_USB_CONTROL);
102 else if (machine_is_omap_osk())
103 tps65010_set_gpio_out_value(GPIO1, LOW);
104 } else {
105 if (machine_is_omap_innovator() && cpu_is_omap1510())
106 __raw_writeb(__raw_readb(INNOVATOR_FPGA_CAM_USB_CONTROL)
107 & ~((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
108 INNOVATOR_FPGA_CAM_USB_CONTROL);
109 else if (machine_is_omap_osk())
110 tps65010_set_gpio_out_value(GPIO1, HIGH);
111 }
112
113 return 0;
114}
115
116#ifdef CONFIG_ARCH_OMAP15XX
117/*
118 * OMAP-1510 specific Local Bus clock on/off
119 */
120static int omap_1510_local_bus_power(int on)
121{
122 if (on) {
123 omap_writel((1 << 1) | (1 << 0), OMAP1510_LB_MMU_CTL);
124 udelay(200);
125 } else {
126 omap_writel(0, OMAP1510_LB_MMU_CTL);
127 }
128
129 return 0;
130}
131
132/*
133 * OMAP-1510 specific Local Bus initialization
134 * NOTE: This assumes 32MB memory size in OMAP1510LB_MEMSIZE.
135 * See also arch/mach-omap/memory.h for __virt_to_dma() and
136 * __dma_to_virt() which need to match with the physical
137 * Local Bus address below.
138 */
139static int omap_1510_local_bus_init(void)
140{
141 unsigned int tlb;
142 unsigned long lbaddr, physaddr;
143
144 omap_writel((omap_readl(OMAP1510_LB_CLOCK_DIV) & 0xfffffff8) | 0x4,
145 OMAP1510_LB_CLOCK_DIV);
146
147 /* Configure the Local Bus MMU table */
148 for (tlb = 0; tlb < OMAP1510_LB_MEMSIZE; tlb++) {
149 lbaddr = tlb * 0x00100000 + OMAP1510_LB_OFFSET;
150 physaddr = tlb * 0x00100000 + PHYS_OFFSET;
151 omap_writel((lbaddr & 0x0fffffff) >> 22, OMAP1510_LB_MMU_CAM_H);
152 omap_writel(((lbaddr & 0x003ffc00) >> 6) | 0xc,
153 OMAP1510_LB_MMU_CAM_L);
154 omap_writel(physaddr >> 16, OMAP1510_LB_MMU_RAM_H);
155 omap_writel((physaddr & 0x0000fc00) | 0x300, OMAP1510_LB_MMU_RAM_L);
156 omap_writel(tlb << 4, OMAP1510_LB_MMU_LCK);
157 omap_writel(0x1, OMAP1510_LB_MMU_LD_TLB);
158 }
159
160 /* Enable the walking table */
161 omap_writel(omap_readl(OMAP1510_LB_MMU_CTL) | (1 << 3), OMAP1510_LB_MMU_CTL);
162 udelay(200);
163
164 return 0;
165}
166#else
167#define omap_1510_local_bus_power(x) {}
168#define omap_1510_local_bus_init() {}
169#endif
170
171#ifdef CONFIG_USB_OTG
172
173static void start_hnp(struct ohci_hcd *ohci)
174{
175 struct usb_hcd *hcd = ohci_to_hcd(ohci);
176 const unsigned port = hcd->self.otg_port - 1;
177 unsigned long flags;
178 u32 l;
179
180 otg_start_hnp(hcd->usb_phy->otg);
181
182 local_irq_save(flags);
183 hcd->usb_phy->otg->state = OTG_STATE_A_SUSPEND;
184 writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]);
185 l = omap_readl(OTG_CTRL);
186 l &= ~OTG_A_BUSREQ;
187 omap_writel(l, OTG_CTRL);
188 local_irq_restore(flags);
189}
190
191#endif
192
193/*-------------------------------------------------------------------------*/
194
195static int ohci_omap_reset(struct usb_hcd *hcd)
196{
197 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
198 struct omap_usb_config *config = dev_get_platdata(hcd->self.controller);
199 int need_transceiver = (config->otg != 0);
200 int ret;
201
202 dev_dbg(hcd->self.controller, "starting USB Controller\n");
203
204 if (config->otg) {
205 hcd->self.otg_port = config->otg;
206 /* default/minimum OTG power budget: 8 mA */
207 hcd->power_budget = 8;
208 }
209
210 /* boards can use OTG transceivers in non-OTG modes */
211 need_transceiver = need_transceiver
212 || machine_is_omap_h2() || machine_is_omap_h3();
213
214 /* XXX OMAP16xx only */
215 if (config->ocpi_enable)
216 config->ocpi_enable();
217
218#ifdef CONFIG_USB_OTG
219 if (need_transceiver) {
220 hcd->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
221 if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
222 int status = otg_set_host(hcd->usb_phy->otg,
223 &ohci_to_hcd(ohci)->self);
224 dev_dbg(hcd->self.controller, "init %s phy, status %d\n",
225 hcd->usb_phy->label, status);
226 if (status) {
227 usb_put_phy(hcd->usb_phy);
228 return status;
229 }
230 } else {
231 return -EPROBE_DEFER;
232 }
233 hcd->skip_phy_initialization = 1;
234 ohci->start_hnp = start_hnp;
235 }
236#endif
237
238 omap_ohci_clock_power(1);
239
240 if (cpu_is_omap15xx()) {
241 omap_1510_local_bus_power(1);
242 omap_1510_local_bus_init();
243 }
244
245 ret = ohci_setup(hcd);
246 if (ret < 0)
247 return ret;
248
249 if (config->otg || config->rwc) {
250 ohci->hc_control = OHCI_CTRL_RWC;
251 writel(OHCI_CTRL_RWC, &ohci->regs->control);
252 }
253
254 /* board-specific power switching and overcurrent support */
255 if (machine_is_omap_osk() || machine_is_omap_innovator()) {
256 u32 rh = roothub_a (ohci);
257
258 /* power switching (ganged by default) */
259 rh &= ~RH_A_NPS;
260
261 /* TPS2045 switch for internal transceiver (port 1) */
262 if (machine_is_omap_osk()) {
263 ohci_to_hcd(ohci)->power_budget = 250;
264
265 rh &= ~RH_A_NOCP;
266
267 /* gpio9 for overcurrent detction */
268 omap_cfg_reg(W8_1610_GPIO9);
269 gpio_request(9, "OHCI overcurrent");
270 gpio_direction_input(9);
271
272 /* for paranoia's sake: disable USB.PUEN */
273 omap_cfg_reg(W4_USB_HIGHZ);
274 }
275 ohci_writel(ohci, rh, &ohci->regs->roothub.a);
276 ohci->flags &= ~OHCI_QUIRK_HUB_POWER;
277 } else if (machine_is_nokia770()) {
278 /* We require a self-powered hub, which should have
279 * plenty of power. */
280 ohci_to_hcd(ohci)->power_budget = 0;
281 }
282
283 /* FIXME hub_wq hub requests should manage power switching */
284 omap_ohci_transceiver_power(1);
285
286 /* board init will have already handled HMC and mux setup.
287 * any external transceiver should already be initialized
288 * too, so all configured ports use the right signaling now.
289 */
290
291 return 0;
292}
293
294/*-------------------------------------------------------------------------*/
295
296/**
297 * ohci_hcd_omap_probe - initialize OMAP-based HCDs
298 * Context: !in_interrupt()
299 *
300 * Allocates basic resources for this USB host controller, and
301 * then invokes the start() method for the HCD associated with it
302 * through the hotplug entry's driver_data.
303 */
304static int ohci_hcd_omap_probe(struct platform_device *pdev)
305{
306 int retval, irq;
307 struct usb_hcd *hcd = 0;
308
309 if (pdev->num_resources != 2) {
310 dev_err(&pdev->dev, "invalid num_resources: %i\n",
311 pdev->num_resources);
312 return -ENODEV;
313 }
314
315 if (pdev->resource[0].flags != IORESOURCE_MEM
316 || pdev->resource[1].flags != IORESOURCE_IRQ) {
317 dev_err(&pdev->dev, "invalid resource type\n");
318 return -ENODEV;
319 }
320
321 usb_host_ck = clk_get(&pdev->dev, "usb_hhc_ck");
322 if (IS_ERR(usb_host_ck))
323 return PTR_ERR(usb_host_ck);
324
325 if (!cpu_is_omap15xx())
326 usb_dc_ck = clk_get(&pdev->dev, "usb_dc_ck");
327 else
328 usb_dc_ck = clk_get(&pdev->dev, "lb_ck");
329
330 if (IS_ERR(usb_dc_ck)) {
331 clk_put(usb_host_ck);
332 return PTR_ERR(usb_dc_ck);
333 }
334
335
336 hcd = usb_create_hcd(&ohci_omap_hc_driver, &pdev->dev,
337 dev_name(&pdev->dev));
338 if (!hcd) {
339 retval = -ENOMEM;
340 goto err0;
341 }
342 hcd->rsrc_start = pdev->resource[0].start;
343 hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
344
345 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
346 dev_dbg(&pdev->dev, "request_mem_region failed\n");
347 retval = -EBUSY;
348 goto err1;
349 }
350
351 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
352 if (!hcd->regs) {
353 dev_err(&pdev->dev, "can't ioremap OHCI HCD\n");
354 retval = -ENOMEM;
355 goto err2;
356 }
357
358 irq = platform_get_irq(pdev, 0);
359 if (irq < 0) {
360 retval = -ENXIO;
361 goto err3;
362 }
363 retval = usb_add_hcd(hcd, irq, 0);
364 if (retval)
365 goto err3;
366
367 device_wakeup_enable(hcd->self.controller);
368 return 0;
369err3:
370 iounmap(hcd->regs);
371err2:
372 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
373err1:
374 usb_put_hcd(hcd);
375err0:
376 clk_put(usb_dc_ck);
377 clk_put(usb_host_ck);
378 return retval;
379}
380
381
382/* may be called with controller, bus, and devices active */
383
384/**
385 * ohci_hcd_omap_remove - shutdown processing for OMAP-based HCDs
386 * @dev: USB Host Controller being removed
387 * Context: !in_interrupt()
388 *
389 * Reverses the effect of ohci_hcd_omap_probe(), first invoking
390 * the HCD's stop() method. It is always called from a thread
391 * context, normally "rmmod", "apmd", or something similar.
392 */
393static int ohci_hcd_omap_remove(struct platform_device *pdev)
394{
395 struct usb_hcd *hcd = platform_get_drvdata(pdev);
396
397 dev_dbg(hcd->self.controller, "stopping USB Controller\n");
398 usb_remove_hcd(hcd);
399 omap_ohci_clock_power(0);
400 if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
401 (void) otg_set_host(hcd->usb_phy->otg, 0);
402 usb_put_phy(hcd->usb_phy);
403 }
404 if (machine_is_omap_osk())
405 gpio_free(9);
406 iounmap(hcd->regs);
407 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
408 usb_put_hcd(hcd);
409 clk_put(usb_dc_ck);
410 clk_put(usb_host_ck);
411 return 0;
412}
413
414/*-------------------------------------------------------------------------*/
415
416#ifdef CONFIG_PM
417
418static int ohci_omap_suspend(struct platform_device *pdev, pm_message_t message)
419{
420 struct usb_hcd *hcd = platform_get_drvdata(pdev);
421 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
422 bool do_wakeup = device_may_wakeup(&pdev->dev);
423 int ret;
424
425 if (time_before(jiffies, ohci->next_statechange))
426 msleep(5);
427 ohci->next_statechange = jiffies;
428
429 ret = ohci_suspend(hcd, do_wakeup);
430 if (ret)
431 return ret;
432
433 omap_ohci_clock_power(0);
434 return ret;
435}
436
437static int ohci_omap_resume(struct platform_device *dev)
438{
439 struct usb_hcd *hcd = platform_get_drvdata(dev);
440 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
441
442 if (time_before(jiffies, ohci->next_statechange))
443 msleep(5);
444 ohci->next_statechange = jiffies;
445
446 omap_ohci_clock_power(1);
447 ohci_resume(hcd, false);
448 return 0;
449}
450
451#endif
452
453/*-------------------------------------------------------------------------*/
454
455/*
456 * Driver definition to register with the OMAP bus
457 */
458static struct platform_driver ohci_hcd_omap_driver = {
459 .probe = ohci_hcd_omap_probe,
460 .remove = ohci_hcd_omap_remove,
461 .shutdown = usb_hcd_platform_shutdown,
462#ifdef CONFIG_PM
463 .suspend = ohci_omap_suspend,
464 .resume = ohci_omap_resume,
465#endif
466 .driver = {
467 .name = "ohci",
468 },
469};
470
471static const struct ohci_driver_overrides omap_overrides __initconst = {
472 .product_desc = "OMAP OHCI",
473 .reset = ohci_omap_reset
474};
475
476static int __init ohci_omap_init(void)
477{
478 if (usb_disabled())
479 return -ENODEV;
480
481 pr_info("%s: " DRIVER_DESC "\n", hcd_name);
482
483 ohci_init_driver(&ohci_omap_hc_driver, &omap_overrides);
484 return platform_driver_register(&ohci_hcd_omap_driver);
485}
486module_init(ohci_omap_init);
487
488static void __exit ohci_omap_cleanup(void)
489{
490 platform_driver_unregister(&ohci_hcd_omap_driver);
491}
492module_exit(ohci_omap_cleanup);
493
494MODULE_DESCRIPTION(DRIVER_DESC);
495MODULE_ALIAS("platform:ohci");
496MODULE_LICENSE("GPL");