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/signal.h> /* IRQF_DISABLED */
18 #include <linux/jiffies.h>
19 #include <linux/platform_device.h>
20 #include <linux/clk.h>
21 #include <linux/gpio.h>
23 #include <mach/hardware.h>
25 #include <asm/mach-types.h>
28 #include <mach/irqs.h>
29 #include <mach/fpga.h>
33 /* OMAP-1510 OHCI has its own MMU for DMA */
34 #define OMAP1510_LB_MEMSIZE 32 /* Should be same as SDRAM size */
35 #define OMAP1510_LB_CLOCK_DIV 0xfffec10c
36 #define OMAP1510_LB_MMU_CTL 0xfffec208
37 #define OMAP1510_LB_MMU_LCK 0xfffec224
38 #define OMAP1510_LB_MMU_LD_TLB 0xfffec228
39 #define OMAP1510_LB_MMU_CAM_H 0xfffec22c
40 #define OMAP1510_LB_MMU_CAM_L 0xfffec230
41 #define OMAP1510_LB_MMU_RAM_H 0xfffec234
42 #define OMAP1510_LB_MMU_RAM_L 0xfffec238
45 #ifndef CONFIG_ARCH_OMAP
46 #error "This file is OMAP bus glue. CONFIG_OMAP must be defined."
49 #ifdef CONFIG_TPS65010
50 #include <linux/i2c/tps65010.h>
58 static inline int tps65010_set_gpio_out_value(unsigned gpio
, unsigned value
)
65 extern int usb_disabled(void);
66 extern int ocpi_enable(void);
68 static struct clk
*usb_host_ck
;
69 static struct clk
*usb_dc_ck
;
70 static int host_enabled
;
71 static int host_initialized
;
73 static void omap_ohci_clock_power(int on
)
76 clk_enable(usb_dc_ck
);
77 clk_enable(usb_host_ck
);
78 /* guesstimate for T5 == 1x 32K clock + APLL lock time */
81 clk_disable(usb_host_ck
);
82 clk_disable(usb_dc_ck
);
87 * Board specific gang-switched transceiver power on/off.
88 * NOTE: OSK supplies power from DC, not battery.
90 static int omap_ohci_transceiver_power(int on
)
93 if (machine_is_omap_innovator() && cpu_is_omap1510())
94 fpga_write(fpga_read(INNOVATOR_FPGA_CAM_USB_CONTROL
)
95 | ((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
96 INNOVATOR_FPGA_CAM_USB_CONTROL
);
97 else if (machine_is_omap_osk())
98 tps65010_set_gpio_out_value(GPIO1
, LOW
);
100 if (machine_is_omap_innovator() && cpu_is_omap1510())
101 fpga_write(fpga_read(INNOVATOR_FPGA_CAM_USB_CONTROL
)
102 & ~((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
103 INNOVATOR_FPGA_CAM_USB_CONTROL
);
104 else if (machine_is_omap_osk())
105 tps65010_set_gpio_out_value(GPIO1
, HIGH
);
111 #ifdef CONFIG_ARCH_OMAP15XX
113 * OMAP-1510 specific Local Bus clock on/off
115 static int omap_1510_local_bus_power(int on
)
118 omap_writel((1 << 1) | (1 << 0), OMAP1510_LB_MMU_CTL
);
121 omap_writel(0, OMAP1510_LB_MMU_CTL
);
128 * OMAP-1510 specific Local Bus initialization
129 * NOTE: This assumes 32MB memory size in OMAP1510LB_MEMSIZE.
130 * See also arch/mach-omap/memory.h for __virt_to_dma() and
131 * __dma_to_virt() which need to match with the physical
132 * Local Bus address below.
134 static int omap_1510_local_bus_init(void)
137 unsigned long lbaddr
, physaddr
;
139 omap_writel((omap_readl(OMAP1510_LB_CLOCK_DIV
) & 0xfffffff8) | 0x4,
140 OMAP1510_LB_CLOCK_DIV
);
142 /* Configure the Local Bus MMU table */
143 for (tlb
= 0; tlb
< OMAP1510_LB_MEMSIZE
; tlb
++) {
144 lbaddr
= tlb
* 0x00100000 + OMAP1510_LB_OFFSET
;
145 physaddr
= tlb
* 0x00100000 + PHYS_OFFSET
;
146 omap_writel((lbaddr
& 0x0fffffff) >> 22, OMAP1510_LB_MMU_CAM_H
);
147 omap_writel(((lbaddr
& 0x003ffc00) >> 6) | 0xc,
148 OMAP1510_LB_MMU_CAM_L
);
149 omap_writel(physaddr
>> 16, OMAP1510_LB_MMU_RAM_H
);
150 omap_writel((physaddr
& 0x0000fc00) | 0x300, OMAP1510_LB_MMU_RAM_L
);
151 omap_writel(tlb
<< 4, OMAP1510_LB_MMU_LCK
);
152 omap_writel(0x1, OMAP1510_LB_MMU_LD_TLB
);
155 /* Enable the walking table */
156 omap_writel(omap_readl(OMAP1510_LB_MMU_CTL
) | (1 << 3), OMAP1510_LB_MMU_CTL
);
162 #define omap_1510_local_bus_power(x) {}
163 #define omap_1510_local_bus_init() {}
166 #ifdef CONFIG_USB_OTG
168 static void start_hnp(struct ohci_hcd
*ohci
)
170 const unsigned port
= ohci_to_hcd(ohci
)->self
.otg_port
- 1;
174 otg_start_hnp(ohci
->transceiver
);
176 local_irq_save(flags
);
177 ohci
->transceiver
->state
= OTG_STATE_A_SUSPEND
;
178 writel (RH_PS_PSS
, &ohci
->regs
->roothub
.portstatus
[port
]);
179 l
= omap_readl(OTG_CTRL
);
181 omap_writel(l
, OTG_CTRL
);
182 local_irq_restore(flags
);
187 /*-------------------------------------------------------------------------*/
189 static int ohci_omap_init(struct usb_hcd
*hcd
)
191 struct ohci_hcd
*ohci
= hcd_to_ohci(hcd
);
192 struct omap_usb_config
*config
= hcd
->self
.controller
->platform_data
;
193 int need_transceiver
= (config
->otg
!= 0);
196 dev_dbg(hcd
->self
.controller
, "starting USB Controller\n");
199 ohci_to_hcd(ohci
)->self
.otg_port
= config
->otg
;
200 /* default/minimum OTG power budget: 8 mA */
201 ohci_to_hcd(ohci
)->power_budget
= 8;
204 /* boards can use OTG transceivers in non-OTG modes */
205 need_transceiver
= need_transceiver
206 || machine_is_omap_h2() || machine_is_omap_h3();
208 if (cpu_is_omap16xx())
211 #ifdef CONFIG_USB_OTG
212 if (need_transceiver
) {
213 ohci
->transceiver
= otg_get_transceiver();
214 if (ohci
->transceiver
) {
215 int status
= otg_set_host(ohci
->transceiver
,
216 &ohci_to_hcd(ohci
)->self
);
217 dev_dbg(hcd
->self
.controller
, "init %s transceiver, status %d\n",
218 ohci
->transceiver
->label
, status
);
220 if (ohci
->transceiver
)
221 put_device(ohci
->transceiver
->dev
);
225 dev_err(hcd
->self
.controller
, "can't find transceiver\n");
228 ohci
->start_hnp
= start_hnp
;
232 omap_ohci_clock_power(1);
234 if (cpu_is_omap15xx()) {
235 omap_1510_local_bus_power(1);
236 omap_1510_local_bus_init();
239 if ((ret
= ohci_init(ohci
)) < 0)
242 /* board-specific power switching and overcurrent support */
243 if (machine_is_omap_osk() || machine_is_omap_innovator()) {
244 u32 rh
= roothub_a (ohci
);
246 /* power switching (ganged by default) */
249 /* TPS2045 switch for internal transceiver (port 1) */
250 if (machine_is_omap_osk()) {
251 ohci_to_hcd(ohci
)->power_budget
= 250;
255 /* gpio9 for overcurrent detction */
256 omap_cfg_reg(W8_1610_GPIO9
);
257 gpio_request(9, "OHCI overcurrent");
258 gpio_direction_input(9);
260 /* for paranoia's sake: disable USB.PUEN */
261 omap_cfg_reg(W4_USB_HIGHZ
);
263 ohci_writel(ohci
, rh
, &ohci
->regs
->roothub
.a
);
264 ohci
->flags
&= ~OHCI_QUIRK_HUB_POWER
;
265 } else if (machine_is_nokia770()) {
266 /* We require a self-powered hub, which should have
267 * plenty of power. */
268 ohci_to_hcd(ohci
)->power_budget
= 0;
271 /* FIXME khubd hub requests should manage power switching */
272 omap_ohci_transceiver_power(1);
274 /* board init will have already handled HMC and mux setup.
275 * any external transceiver should already be initialized
276 * too, so all configured ports use the right signaling now.
282 static void ohci_omap_stop(struct usb_hcd
*hcd
)
284 dev_dbg(hcd
->self
.controller
, "stopping USB Controller\n");
285 omap_ohci_clock_power(0);
289 /*-------------------------------------------------------------------------*/
292 * usb_hcd_omap_probe - initialize OMAP-based HCDs
293 * Context: !in_interrupt()
295 * Allocates basic resources for this USB host controller, and
296 * then invokes the start() method for the HCD associated with it
297 * through the hotplug entry's driver_data.
299 static int usb_hcd_omap_probe (const struct hc_driver
*driver
,
300 struct platform_device
*pdev
)
303 struct usb_hcd
*hcd
= 0;
304 struct ohci_hcd
*ohci
;
306 if (pdev
->num_resources
!= 2) {
307 printk(KERN_ERR
"hcd probe: invalid num_resources: %i\n",
308 pdev
->num_resources
);
312 if (pdev
->resource
[0].flags
!= IORESOURCE_MEM
313 || pdev
->resource
[1].flags
!= IORESOURCE_IRQ
) {
314 printk(KERN_ERR
"hcd probe: invalid resource type\n");
318 usb_host_ck
= clk_get(0, "usb_hhc_ck");
319 if (IS_ERR(usb_host_ck
))
320 return PTR_ERR(usb_host_ck
);
322 if (!cpu_is_omap15xx())
323 usb_dc_ck
= clk_get(0, "usb_dc_ck");
325 usb_dc_ck
= clk_get(0, "lb_ck");
327 if (IS_ERR(usb_dc_ck
)) {
328 clk_put(usb_host_ck
);
329 return PTR_ERR(usb_dc_ck
);
333 hcd
= usb_create_hcd (driver
, &pdev
->dev
, dev_name(&pdev
->dev
));
338 hcd
->rsrc_start
= pdev
->resource
[0].start
;
339 hcd
->rsrc_len
= pdev
->resource
[0].end
- pdev
->resource
[0].start
+ 1;
341 if (!request_mem_region(hcd
->rsrc_start
, hcd
->rsrc_len
, hcd_name
)) {
342 dev_dbg(&pdev
->dev
, "request_mem_region failed\n");
347 hcd
->regs
= ioremap(hcd
->rsrc_start
, hcd
->rsrc_len
);
349 dev_err(&pdev
->dev
, "can't ioremap OHCI HCD\n");
354 ohci
= hcd_to_ohci(hcd
);
357 host_initialized
= 0;
360 irq
= platform_get_irq(pdev
, 0);
365 retval
= usb_add_hcd(hcd
, irq
, IRQF_DISABLED
);
369 host_initialized
= 1;
372 omap_ohci_clock_power(0);
378 release_mem_region(hcd
->rsrc_start
, hcd
->rsrc_len
);
383 clk_put(usb_host_ck
);
388 /* may be called with controller, bus, and devices active */
391 * usb_hcd_omap_remove - shutdown processing for OMAP-based HCDs
392 * @dev: USB Host Controller being removed
393 * Context: !in_interrupt()
395 * Reverses the effect of usb_hcd_omap_probe(), first invoking
396 * the HCD's stop() method. It is always called from a thread
397 * context, normally "rmmod", "apmd", or something similar.
400 usb_hcd_omap_remove (struct usb_hcd
*hcd
, struct platform_device
*pdev
)
402 struct ohci_hcd
*ohci
= hcd_to_ohci (hcd
);
405 if (ohci
->transceiver
) {
406 (void) otg_set_host(ohci
->transceiver
, 0);
407 put_device(ohci
->transceiver
->dev
);
409 if (machine_is_omap_osk())
412 release_mem_region(hcd
->rsrc_start
, hcd
->rsrc_len
);
415 clk_put(usb_host_ck
);
418 /*-------------------------------------------------------------------------*/
421 ohci_omap_start (struct usb_hcd
*hcd
)
423 struct omap_usb_config
*config
;
424 struct ohci_hcd
*ohci
= hcd_to_ohci (hcd
);
429 config
= hcd
->self
.controller
->platform_data
;
430 if (config
->otg
|| config
->rwc
) {
431 ohci
->hc_control
= OHCI_CTRL_RWC
;
432 writel(OHCI_CTRL_RWC
, &ohci
->regs
->control
);
435 if ((ret
= ohci_run (ohci
)) < 0) {
436 dev_err(hcd
->self
.controller
, "can't start\n");
443 /*-------------------------------------------------------------------------*/
445 static const struct hc_driver ohci_omap_hc_driver
= {
446 .description
= hcd_name
,
447 .product_desc
= "OMAP OHCI",
448 .hcd_priv_size
= sizeof(struct ohci_hcd
),
451 * generic hardware linkage
454 .flags
= HCD_USB11
| HCD_MEMORY
,
457 * basic lifecycle operations
459 .reset
= ohci_omap_init
,
460 .start
= ohci_omap_start
,
461 .stop
= ohci_omap_stop
,
462 .shutdown
= ohci_shutdown
,
465 * managing i/o requests and associated device resources
467 .urb_enqueue
= ohci_urb_enqueue
,
468 .urb_dequeue
= ohci_urb_dequeue
,
469 .endpoint_disable
= ohci_endpoint_disable
,
474 .get_frame_number
= ohci_get_frame
,
479 .hub_status_data
= ohci_hub_status_data
,
480 .hub_control
= ohci_hub_control
,
482 .bus_suspend
= ohci_bus_suspend
,
483 .bus_resume
= ohci_bus_resume
,
485 .start_port_reset
= ohci_start_port_reset
,
488 /*-------------------------------------------------------------------------*/
490 static int ohci_hcd_omap_drv_probe(struct platform_device
*dev
)
492 return usb_hcd_omap_probe(&ohci_omap_hc_driver
, dev
);
495 static int ohci_hcd_omap_drv_remove(struct platform_device
*dev
)
497 struct usb_hcd
*hcd
= platform_get_drvdata(dev
);
499 usb_hcd_omap_remove(hcd
, dev
);
500 platform_set_drvdata(dev
, NULL
);
505 /*-------------------------------------------------------------------------*/
509 static int ohci_omap_suspend(struct platform_device
*dev
, pm_message_t message
)
511 struct ohci_hcd
*ohci
= hcd_to_ohci(platform_get_drvdata(dev
));
513 if (time_before(jiffies
, ohci
->next_statechange
))
515 ohci
->next_statechange
= jiffies
;
517 omap_ohci_clock_power(0);
518 ohci_to_hcd(ohci
)->state
= HC_STATE_SUSPENDED
;
522 static int ohci_omap_resume(struct platform_device
*dev
)
524 struct usb_hcd
*hcd
= platform_get_drvdata(dev
);
525 struct ohci_hcd
*ohci
= hcd_to_ohci(hcd
);
527 if (time_before(jiffies
, ohci
->next_statechange
))
529 ohci
->next_statechange
= jiffies
;
531 omap_ohci_clock_power(1);
532 ohci_finish_controller_resume(hcd
);
538 /*-------------------------------------------------------------------------*/
541 * Driver definition to register with the OMAP bus
543 static struct platform_driver ohci_hcd_omap_driver
= {
544 .probe
= ohci_hcd_omap_drv_probe
,
545 .remove
= ohci_hcd_omap_drv_remove
,
546 .shutdown
= usb_hcd_platform_shutdown
,
548 .suspend
= ohci_omap_suspend
,
549 .resume
= ohci_omap_resume
,
552 .owner
= THIS_MODULE
,
557 MODULE_ALIAS("platform:ohci");