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 <asm/hardware.h>
19 #include <asm/mach-types.h>
21 #include <asm/arch/mux.h>
22 #include <asm/arch/irqs.h>
23 #include <asm/arch/gpio.h>
24 #include <asm/arch/fpga.h>
25 #include <asm/arch/usb.h>
26 #include <asm/hardware/clock.h>
29 /* OMAP-1510 OHCI has its own MMU for DMA */
30 #define OMAP1510_LB_MEMSIZE 32 /* Should be same as SDRAM size */
31 #define OMAP1510_LB_CLOCK_DIV 0xfffec10c
32 #define OMAP1510_LB_MMU_CTL 0xfffec208
33 #define OMAP1510_LB_MMU_LCK 0xfffec224
34 #define OMAP1510_LB_MMU_LD_TLB 0xfffec228
35 #define OMAP1510_LB_MMU_CAM_H 0xfffec22c
36 #define OMAP1510_LB_MMU_CAM_L 0xfffec230
37 #define OMAP1510_LB_MMU_RAM_H 0xfffec234
38 #define OMAP1510_LB_MMU_RAM_L 0xfffec238
41 #ifndef CONFIG_ARCH_OMAP
42 #error "This file is OMAP bus glue. CONFIG_OMAP must be defined."
45 #ifdef CONFIG_TPS65010
46 #include <asm/arch/tps65010.h>
54 static inline int tps65010_set_gpio_out_value(unsigned gpio
, unsigned value
)
61 extern int usb_disabled(void);
62 extern int ocpi_enable(void);
64 static struct clk
*usb_host_ck
;
66 static void omap_ohci_clock_power(int on
)
69 clk_enable(usb_host_ck
);
70 /* guesstimate for T5 == 1x 32K clock + APLL lock time */
73 clk_disable(usb_host_ck
);
78 * Board specific gang-switched transceiver power on/off.
79 * NOTE: OSK supplies power from DC, not battery.
81 static int omap_ohci_transceiver_power(int on
)
84 if (machine_is_omap_innovator() && cpu_is_omap1510())
85 fpga_write(fpga_read(INNOVATOR_FPGA_CAM_USB_CONTROL
)
86 | ((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
87 INNOVATOR_FPGA_CAM_USB_CONTROL
);
88 else if (machine_is_omap_osk())
89 tps65010_set_gpio_out_value(GPIO1
, LOW
);
91 if (machine_is_omap_innovator() && cpu_is_omap1510())
92 fpga_write(fpga_read(INNOVATOR_FPGA_CAM_USB_CONTROL
)
93 & ~((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
94 INNOVATOR_FPGA_CAM_USB_CONTROL
);
95 else if (machine_is_omap_osk())
96 tps65010_set_gpio_out_value(GPIO1
, HIGH
);
103 * OMAP-1510 specific Local Bus clock on/off
105 static int omap_1510_local_bus_power(int on
)
108 omap_writel((1 << 1) | (1 << 0), OMAP1510_LB_MMU_CTL
);
111 omap_writel(0, OMAP1510_LB_MMU_CTL
);
118 * OMAP-1510 specific Local Bus initialization
119 * NOTE: This assumes 32MB memory size in OMAP1510LB_MEMSIZE.
120 * See also arch/mach-omap/memory.h for __virt_to_dma() and
121 * __dma_to_virt() which need to match with the physical
122 * Local Bus address below.
124 static int omap_1510_local_bus_init(void)
127 unsigned long lbaddr
, physaddr
;
129 omap_writel((omap_readl(OMAP1510_LB_CLOCK_DIV
) & 0xfffffff8) | 0x4,
130 OMAP1510_LB_CLOCK_DIV
);
132 /* Configure the Local Bus MMU table */
133 for (tlb
= 0; tlb
< OMAP1510_LB_MEMSIZE
; tlb
++) {
134 lbaddr
= tlb
* 0x00100000 + OMAP1510_LB_OFFSET
;
135 physaddr
= tlb
* 0x00100000 + PHYS_OFFSET
;
136 omap_writel((lbaddr
& 0x0fffffff) >> 22, OMAP1510_LB_MMU_CAM_H
);
137 omap_writel(((lbaddr
& 0x003ffc00) >> 6) | 0xc,
138 OMAP1510_LB_MMU_CAM_L
);
139 omap_writel(physaddr
>> 16, OMAP1510_LB_MMU_RAM_H
);
140 omap_writel((physaddr
& 0x0000fc00) | 0x300, OMAP1510_LB_MMU_RAM_L
);
141 omap_writel(tlb
<< 4, OMAP1510_LB_MMU_LCK
);
142 omap_writel(0x1, OMAP1510_LB_MMU_LD_TLB
);
145 /* Enable the walking table */
146 omap_writel(omap_readl(OMAP1510_LB_MMU_CTL
) | (1 << 3), OMAP1510_LB_MMU_CTL
);
152 #ifdef CONFIG_USB_OTG
154 static void start_hnp(struct ohci_hcd
*ohci
)
156 const unsigned port
= ohci_to_hcd(ohci
)->self
.otg_port
- 1;
159 otg_start_hnp(ohci
->transceiver
);
161 local_irq_save(flags
);
162 ohci
->transceiver
->state
= OTG_STATE_A_SUSPEND
;
163 writel (RH_PS_PSS
, &ohci
->regs
->roothub
.portstatus
[port
]);
164 OTG_CTRL_REG
&= ~OTG_A_BUSREQ
;
165 local_irq_restore(flags
);
170 /*-------------------------------------------------------------------------*/
172 static int omap_start_hc(struct ohci_hcd
*ohci
, struct platform_device
*pdev
)
174 struct omap_usb_config
*config
= pdev
->dev
.platform_data
;
175 int need_transceiver
= (config
->otg
!= 0);
178 dev_dbg(&pdev
->dev
, "starting USB Controller\n");
181 ohci_to_hcd(ohci
)->self
.otg_port
= config
->otg
;
182 /* default/minimum OTG power budget: 8 mA */
183 ohci_to_hcd(ohci
)->power_budget
= 8;
186 /* boards can use OTG transceivers in non-OTG modes */
187 need_transceiver
= need_transceiver
188 || machine_is_omap_h2() || machine_is_omap_h3();
190 if (cpu_is_omap16xx())
193 #ifdef CONFIG_ARCH_OMAP_OTG
194 if (need_transceiver
) {
195 ohci
->transceiver
= otg_get_transceiver();
196 if (ohci
->transceiver
) {
197 int status
= otg_set_host(ohci
->transceiver
,
198 &ohci_to_hcd(ohci
)->self
);
199 dev_dbg(&pdev
->dev
, "init %s transceiver, status %d\n",
200 ohci
->transceiver
->label
, status
);
202 if (ohci
->transceiver
)
203 put_device(ohci
->transceiver
->dev
);
207 dev_err(&pdev
->dev
, "can't find transceiver\n");
213 omap_ohci_clock_power(1);
215 if (cpu_is_omap1510()) {
216 omap_1510_local_bus_power(1);
217 omap_1510_local_bus_init();
220 if ((ret
= ohci_init(ohci
)) < 0)
223 /* board-specific power switching and overcurrent support */
224 if (machine_is_omap_osk() || machine_is_omap_innovator()) {
225 u32 rh
= roothub_a (ohci
);
227 /* power switching (ganged by default) */
230 /* TPS2045 switch for internal transceiver (port 1) */
231 if (machine_is_omap_osk()) {
232 ohci_to_hcd(ohci
)->power_budget
= 250;
236 /* gpio9 for overcurrent detction */
237 omap_cfg_reg(W8_1610_GPIO9
);
238 omap_request_gpio(9);
239 omap_set_gpio_direction(9, 1 /* IN */);
241 /* for paranoia's sake: disable USB.PUEN */
242 omap_cfg_reg(W4_USB_HIGHZ
);
244 ohci_writel(ohci
, rh
, &ohci
->regs
->roothub
.a
);
245 distrust_firmware
= 0;
248 /* FIXME khubd hub requests should manage power switching */
249 omap_ohci_transceiver_power(1);
251 /* board init will have already handled HMC and mux setup.
252 * any external transceiver should already be initialized
253 * too, so all configured ports use the right signaling now.
259 static void omap_stop_hc(struct platform_device
*pdev
)
261 dev_dbg(&pdev
->dev
, "stopping USB Controller\n");
262 omap_ohci_clock_power(0);
266 /*-------------------------------------------------------------------------*/
268 void usb_hcd_omap_remove (struct usb_hcd
*, struct platform_device
*);
270 /* configure so an HC device and id are always provided */
271 /* always called with process context; sleeping is OK */
275 * usb_hcd_omap_probe - initialize OMAP-based HCDs
276 * Context: !in_interrupt()
278 * Allocates basic resources for this USB host controller, and
279 * then invokes the start() method for the HCD associated with it
280 * through the hotplug entry's driver_data.
282 int usb_hcd_omap_probe (const struct hc_driver
*driver
,
283 struct platform_device
*pdev
)
286 struct usb_hcd
*hcd
= 0;
287 struct ohci_hcd
*ohci
;
289 if (pdev
->num_resources
!= 2) {
290 printk(KERN_ERR
"hcd probe: invalid num_resources: %i\n",
291 pdev
->num_resources
);
295 if (pdev
->resource
[0].flags
!= IORESOURCE_MEM
296 || pdev
->resource
[1].flags
!= IORESOURCE_IRQ
) {
297 printk(KERN_ERR
"hcd probe: invalid resource type\n");
301 usb_host_ck
= clk_get(0, "usb_hhc_ck");
302 if (IS_ERR(usb_host_ck
))
303 return PTR_ERR(usb_host_ck
);
305 hcd
= usb_create_hcd (driver
, &pdev
->dev
, pdev
->dev
.bus_id
);
310 hcd
->rsrc_start
= pdev
->resource
[0].start
;
311 hcd
->rsrc_len
= pdev
->resource
[0].end
- pdev
->resource
[0].start
+ 1;
313 if (!request_mem_region(hcd
->rsrc_start
, hcd
->rsrc_len
, hcd_name
)) {
314 dev_dbg(&pdev
->dev
, "request_mem_region failed\n");
319 hcd
->regs
= (void __iomem
*) (int) IO_ADDRESS(hcd
->rsrc_start
);
321 ohci
= hcd_to_ohci(hcd
);
324 retval
= omap_start_hc(ohci
, pdev
);
328 retval
= usb_add_hcd(hcd
, platform_get_irq(pdev
, 0), SA_INTERRUPT
);
334 release_mem_region(hcd
->rsrc_start
, hcd
->rsrc_len
);
338 clk_put(usb_host_ck
);
343 /* may be called with controller, bus, and devices active */
346 * usb_hcd_omap_remove - shutdown processing for OMAP-based HCDs
347 * @dev: USB Host Controller being removed
348 * Context: !in_interrupt()
350 * Reverses the effect of usb_hcd_omap_probe(), first invoking
351 * the HCD's stop() method. It is always called from a thread
352 * context, normally "rmmod", "apmd", or something similar.
355 void usb_hcd_omap_remove (struct usb_hcd
*hcd
, struct platform_device
*pdev
)
358 if (machine_is_omap_osk())
361 release_mem_region(hcd
->rsrc_start
, hcd
->rsrc_len
);
363 clk_put(usb_host_ck
);
366 /*-------------------------------------------------------------------------*/
369 ohci_omap_start (struct usb_hcd
*hcd
)
371 struct omap_usb_config
*config
;
372 struct ohci_hcd
*ohci
= hcd_to_ohci (hcd
);
375 config
= hcd
->self
.controller
->platform_data
;
376 if (config
->otg
|| config
->rwc
)
377 writel(OHCI_CTRL_RWC
, &ohci
->regs
->control
);
379 if ((ret
= ohci_run (ohci
)) < 0) {
380 dev_err(hcd
->self
.controller
, "can't start\n");
387 /*-------------------------------------------------------------------------*/
389 static const struct hc_driver ohci_omap_hc_driver
= {
390 .description
= hcd_name
,
391 .product_desc
= "OMAP OHCI",
392 .hcd_priv_size
= sizeof(struct ohci_hcd
),
395 * generic hardware linkage
398 .flags
= HCD_USB11
| HCD_MEMORY
,
401 * basic lifecycle operations
403 .start
= ohci_omap_start
,
407 * managing i/o requests and associated device resources
409 .urb_enqueue
= ohci_urb_enqueue
,
410 .urb_dequeue
= ohci_urb_dequeue
,
411 .endpoint_disable
= ohci_endpoint_disable
,
416 .get_frame_number
= ohci_get_frame
,
421 .hub_status_data
= ohci_hub_status_data
,
422 .hub_control
= ohci_hub_control
,
423 #ifdef CONFIG_USB_SUSPEND
424 .hub_suspend
= ohci_hub_suspend
,
425 .hub_resume
= ohci_hub_resume
,
427 .start_port_reset
= ohci_start_port_reset
,
430 /*-------------------------------------------------------------------------*/
432 static int ohci_hcd_omap_drv_probe(struct device
*dev
)
434 return usb_hcd_omap_probe(&ohci_omap_hc_driver
,
435 to_platform_device(dev
));
438 static int ohci_hcd_omap_drv_remove(struct device
*dev
)
440 struct platform_device
*pdev
= to_platform_device(dev
);
441 struct usb_hcd
*hcd
= dev_get_drvdata(dev
);
442 struct ohci_hcd
*ohci
= hcd_to_ohci (hcd
);
444 usb_hcd_omap_remove(hcd
, pdev
);
445 if (ohci
->transceiver
) {
446 (void) otg_set_host(ohci
->transceiver
, 0);
447 put_device(ohci
->transceiver
->dev
);
449 dev_set_drvdata(dev
, NULL
);
454 /*-------------------------------------------------------------------------*/
458 static int ohci_omap_suspend(struct device
*dev
, pm_message_t message
, u32 level
)
460 struct ohci_hcd
*ohci
= hcd_to_ohci(dev_get_drvdata(dev
));
461 int status
= -EINVAL
;
463 if (level
!= SUSPEND_POWER_DOWN
)
466 down(&ohci_to_hcd(ohci
)->self
.root_hub
->serialize
);
467 status
= ohci_hub_suspend(ohci_to_hcd(ohci
));
469 omap_ohci_clock_power(0);
470 ohci_to_hcd(ohci
)->self
.root_hub
->state
=
472 ohci_to_hcd(ohci
)->state
= HC_STATE_SUSPENDED
;
473 dev
->power
.power_state
= PMSG_SUSPEND
;
475 up(&ohci_to_hcd(ohci
)->self
.root_hub
->serialize
);
479 static int ohci_omap_resume(struct device
*dev
, u32 level
)
481 struct ohci_hcd
*ohci
= hcd_to_ohci(dev_get_drvdata(dev
));
484 if (level
!= RESUME_POWER_ON
)
487 if (time_before(jiffies
, ohci
->next_statechange
))
489 ohci
->next_statechange
= jiffies
;
490 omap_ohci_clock_power(1);
491 #ifdef CONFIG_USB_SUSPEND
492 /* get extra cleanup even if remote wakeup isn't in use */
493 status
= usb_resume_device(ohci_to_hcd(ohci
)->self
.root_hub
);
495 down(&ohci_to_hcd(ohci
)->self
.root_hub
->serialize
);
496 status
= ohci_hub_resume(ohci_to_hcd(ohci
));
497 up(&ohci_to_hcd(ohci
)->self
.root_hub
->serialize
);
500 dev
->power
.power_state
= PMSG_ON
;
506 /*-------------------------------------------------------------------------*/
509 * Driver definition to register with the OMAP bus
511 static struct device_driver ohci_hcd_omap_driver
= {
513 .bus
= &platform_bus_type
,
514 .probe
= ohci_hcd_omap_drv_probe
,
515 .remove
= ohci_hcd_omap_drv_remove
,
517 .suspend
= ohci_omap_suspend
,
518 .resume
= ohci_omap_resume
,
522 static int __init
ohci_hcd_omap_init (void)
524 printk (KERN_DEBUG
"%s: " DRIVER_INFO
" (OMAP)\n", hcd_name
);
528 pr_debug("%s: block sizes: ed %Zd td %Zd\n", hcd_name
,
529 sizeof (struct ed
), sizeof (struct td
));
531 return driver_register(&ohci_hcd_omap_driver
);
534 static void __exit
ohci_hcd_omap_cleanup (void)
536 driver_unregister(&ohci_hcd_omap_driver
);
539 module_init (ohci_hcd_omap_init
);
540 module_exit (ohci_hcd_omap_cleanup
);