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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/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");
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");