2 * OHCI HCD (Host Controller Driver) for USB.
4 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
5 * (C) Copyright 2000-2005 David Brownell
6 * (C) Copyright 2002 Hewlett-Packard Company
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>
14 * This file is licenced under the GPL.
17 #include <linux/clk.h>
18 #include <linux/dma-mapping.h>
19 #include <linux/err.h>
20 #include <linux/gpio.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>
34 #include <asm/mach-types.h>
38 #include <mach/hardware.h>
39 #include <mach/irqs.h>
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
54 #define DRIVER_DESC "OHCI OMAP driver"
56 #ifdef CONFIG_TPS65010
57 #include <linux/i2c/tps65010.h>
65 static inline int tps65010_set_gpio_out_value(unsigned gpio
, unsigned value
)
72 extern int usb_disabled(void);
73 extern int ocpi_enable(void);
75 static struct clk
*usb_host_ck
;
76 static struct clk
*usb_dc_ck
;
78 static const char hcd_name
[] = "ohci-omap";
79 static struct hc_driver __read_mostly ohci_omap_hc_driver
;
81 static void omap_ohci_clock_power(int on
)
84 clk_enable(usb_dc_ck
);
85 clk_enable(usb_host_ck
);
86 /* guesstimate for T5 == 1x 32K clock + APLL lock time */
89 clk_disable(usb_host_ck
);
90 clk_disable(usb_dc_ck
);
95 * Board specific gang-switched transceiver power on/off.
96 * NOTE: OSK supplies power from DC, not battery.
98 static int omap_ohci_transceiver_power(int 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
);
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
);
119 #ifdef CONFIG_ARCH_OMAP15XX
121 * OMAP-1510 specific Local Bus clock on/off
123 static int omap_1510_local_bus_power(int on
)
126 omap_writel((1 << 1) | (1 << 0), OMAP1510_LB_MMU_CTL
);
129 omap_writel(0, OMAP1510_LB_MMU_CTL
);
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.
142 static int omap_1510_local_bus_init(void)
145 unsigned long lbaddr
, physaddr
;
147 omap_writel((omap_readl(OMAP1510_LB_CLOCK_DIV
) & 0xfffffff8) | 0x4,
148 OMAP1510_LB_CLOCK_DIV
);
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
);
163 /* Enable the walking table */
164 omap_writel(omap_readl(OMAP1510_LB_MMU_CTL
) | (1 << 3), OMAP1510_LB_MMU_CTL
);
170 #define omap_1510_local_bus_power(x) {}
171 #define omap_1510_local_bus_init() {}
174 #ifdef CONFIG_USB_OTG
176 static void start_hnp(struct ohci_hcd
*ohci
)
178 struct usb_hcd
*hcd
= ohci_to_hcd(ohci
);
179 const unsigned port
= hcd
->self
.otg_port
- 1;
183 otg_start_hnp(hcd
->phy
->otg
);
185 local_irq_save(flags
);
186 hcd
->phy
->state
= OTG_STATE_A_SUSPEND
;
187 writel (RH_PS_PSS
, &ohci
->regs
->roothub
.portstatus
[port
]);
188 l
= omap_readl(OTG_CTRL
);
190 omap_writel(l
, OTG_CTRL
);
191 local_irq_restore(flags
);
196 /*-------------------------------------------------------------------------*/
198 static int ohci_omap_reset(struct usb_hcd
*hcd
)
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);
205 dev_dbg(hcd
->self
.controller
, "starting USB Controller\n");
208 hcd
->self
.otg_port
= config
->otg
;
209 /* default/minimum OTG power budget: 8 mA */
210 hcd
->power_budget
= 8;
213 /* boards can use OTG transceivers in non-OTG modes */
214 need_transceiver
= need_transceiver
215 || machine_is_omap_h2() || machine_is_omap_h3();
217 /* XXX OMAP16xx only */
218 if (config
->ocpi_enable
)
219 config
->ocpi_enable();
221 #ifdef CONFIG_USB_OTG
222 if (need_transceiver
) {
223 hcd
->phy
= usb_get_phy(USB_PHY_TYPE_USB2
);
224 if (!IS_ERR_OR_NULL(hcd
->phy
)) {
225 int status
= otg_set_host(hcd
->phy
->otg
,
226 &ohci_to_hcd(ohci
)->self
);
227 dev_dbg(hcd
->self
.controller
, "init %s phy, status %d\n",
228 hcd
->phy
->label
, status
);
230 usb_put_phy(hcd
->phy
);
234 dev_err(hcd
->self
.controller
, "can't find phy\n");
237 ohci
->start_hnp
= start_hnp
;
241 omap_ohci_clock_power(1);
243 if (cpu_is_omap15xx()) {
244 omap_1510_local_bus_power(1);
245 omap_1510_local_bus_init();
248 ret
= ohci_setup(hcd
);
252 if (config
->otg
|| config
->rwc
) {
253 ohci
->hc_control
= OHCI_CTRL_RWC
;
254 writel(OHCI_CTRL_RWC
, &ohci
->regs
->control
);
257 /* board-specific power switching and overcurrent support */
258 if (machine_is_omap_osk() || machine_is_omap_innovator()) {
259 u32 rh
= roothub_a (ohci
);
261 /* power switching (ganged by default) */
264 /* TPS2045 switch for internal transceiver (port 1) */
265 if (machine_is_omap_osk()) {
266 ohci_to_hcd(ohci
)->power_budget
= 250;
270 /* gpio9 for overcurrent detction */
271 omap_cfg_reg(W8_1610_GPIO9
);
272 gpio_request(9, "OHCI overcurrent");
273 gpio_direction_input(9);
275 /* for paranoia's sake: disable USB.PUEN */
276 omap_cfg_reg(W4_USB_HIGHZ
);
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;
286 /* FIXME khubd hub requests should manage power switching */
287 omap_ohci_transceiver_power(1);
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.
297 /*-------------------------------------------------------------------------*/
300 * usb_hcd_omap_probe - initialize OMAP-based HCDs
301 * Context: !in_interrupt()
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.
307 static int usb_hcd_omap_probe (const struct hc_driver
*driver
,
308 struct platform_device
*pdev
)
311 struct usb_hcd
*hcd
= 0;
313 if (pdev
->num_resources
!= 2) {
314 dev_err(&pdev
->dev
, "invalid num_resources: %i\n",
315 pdev
->num_resources
);
319 if (pdev
->resource
[0].flags
!= IORESOURCE_MEM
320 || pdev
->resource
[1].flags
!= IORESOURCE_IRQ
) {
321 dev_err(&pdev
->dev
, "invalid resource type\n");
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
);
329 if (!cpu_is_omap15xx())
330 usb_dc_ck
= clk_get(&pdev
->dev
, "usb_dc_ck");
332 usb_dc_ck
= clk_get(&pdev
->dev
, "lb_ck");
334 if (IS_ERR(usb_dc_ck
)) {
335 clk_put(usb_host_ck
);
336 return PTR_ERR(usb_dc_ck
);
340 hcd
= usb_create_hcd (driver
, &pdev
->dev
, dev_name(&pdev
->dev
));
345 hcd
->rsrc_start
= pdev
->resource
[0].start
;
346 hcd
->rsrc_len
= pdev
->resource
[0].end
- pdev
->resource
[0].start
+ 1;
348 if (!request_mem_region(hcd
->rsrc_start
, hcd
->rsrc_len
, hcd_name
)) {
349 dev_dbg(&pdev
->dev
, "request_mem_region failed\n");
354 hcd
->regs
= ioremap(hcd
->rsrc_start
, hcd
->rsrc_len
);
356 dev_err(&pdev
->dev
, "can't ioremap OHCI HCD\n");
361 irq
= platform_get_irq(pdev
, 0);
366 retval
= usb_add_hcd(hcd
, irq
, 0);
370 device_wakeup_enable(hcd
->self
.controller
);
375 release_mem_region(hcd
->rsrc_start
, hcd
->rsrc_len
);
380 clk_put(usb_host_ck
);
385 /* may be called with controller, bus, and devices active */
388 * usb_hcd_omap_remove - shutdown processing for OMAP-based HCDs
389 * @dev: USB Host Controller being removed
390 * Context: !in_interrupt()
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.
397 usb_hcd_omap_remove (struct usb_hcd
*hcd
, struct platform_device
*pdev
)
399 dev_dbg(hcd
->self
.controller
, "stopping USB Controller\n");
401 omap_ohci_clock_power(0);
402 if (!IS_ERR_OR_NULL(hcd
->phy
)) {
403 (void) otg_set_host(hcd
->phy
->otg
, 0);
404 usb_put_phy(hcd
->phy
);
406 if (machine_is_omap_osk())
409 release_mem_region(hcd
->rsrc_start
, hcd
->rsrc_len
);
412 clk_put(usb_host_ck
);
415 /*-------------------------------------------------------------------------*/
417 static int ohci_hcd_omap_drv_probe(struct platform_device
*dev
)
419 return usb_hcd_omap_probe(&ohci_omap_hc_driver
, dev
);
422 static int ohci_hcd_omap_drv_remove(struct platform_device
*dev
)
424 struct usb_hcd
*hcd
= platform_get_drvdata(dev
);
426 usb_hcd_omap_remove(hcd
, dev
);
431 /*-------------------------------------------------------------------------*/
435 static int ohci_omap_suspend(struct platform_device
*pdev
, pm_message_t message
)
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
);
442 if (time_before(jiffies
, ohci
->next_statechange
))
444 ohci
->next_statechange
= jiffies
;
446 ret
= ohci_suspend(hcd
, do_wakeup
);
450 omap_ohci_clock_power(0);
454 static int ohci_omap_resume(struct platform_device
*dev
)
456 struct usb_hcd
*hcd
= platform_get_drvdata(dev
);
457 struct ohci_hcd
*ohci
= hcd_to_ohci(hcd
);
459 if (time_before(jiffies
, ohci
->next_statechange
))
461 ohci
->next_statechange
= jiffies
;
463 omap_ohci_clock_power(1);
464 ohci_resume(hcd
, false);
470 /*-------------------------------------------------------------------------*/
473 * Driver definition to register with the OMAP bus
475 static 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
,
480 .suspend
= ohci_omap_suspend
,
481 .resume
= ohci_omap_resume
,
484 .owner
= THIS_MODULE
,
489 static const struct ohci_driver_overrides omap_overrides __initconst
= {
490 .product_desc
= "OMAP OHCI",
491 .reset
= ohci_omap_reset
494 static int __init
ohci_omap_init(void)
499 pr_info("%s: " DRIVER_DESC
"\n", hcd_name
);
501 ohci_init_driver(&ohci_omap_hc_driver
, &omap_overrides
);
502 return platform_driver_register(&ohci_hcd_omap_driver
);
504 module_init(ohci_omap_init
);
506 static void __exit
ohci_omap_cleanup(void)
508 platform_driver_unregister(&ohci_hcd_omap_driver
);
510 module_exit(ohci_omap_cleanup
);
512 MODULE_DESCRIPTION(DRIVER_DESC
);
513 MODULE_ALIAS("platform:ohci");
514 MODULE_LICENSE("GPL");