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>
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 <plat/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");
286 omap_ohci_clock_power(0);
290 /*-------------------------------------------------------------------------*/
293 * usb_hcd_omap_probe - initialize OMAP-based HCDs
294 * Context: !in_interrupt()
296 * Allocates basic resources for this USB host controller, and
297 * then invokes the start() method for the HCD associated with it
298 * through the hotplug entry's driver_data.
300 static int usb_hcd_omap_probe (const struct hc_driver *driver,
301 struct platform_device *pdev)
304 struct usb_hcd *hcd = 0;
305 struct ohci_hcd *ohci;
307 if (pdev->num_resources != 2) {
308 printk(KERN_ERR "hcd probe: invalid num_resources: %i\n",
309 pdev->num_resources);
313 if (pdev->resource[0].flags != IORESOURCE_MEM
314 || pdev->resource[1].flags != IORESOURCE_IRQ) {
315 printk(KERN_ERR "hcd probe: invalid resource type\n");
319 usb_host_ck = clk_get(&pdev->dev, "usb_hhc_ck");
320 if (IS_ERR(usb_host_ck))
321 return PTR_ERR(usb_host_ck);
323 if (!cpu_is_omap15xx())
324 usb_dc_ck = clk_get(&pdev->dev, "usb_dc_ck");
326 usb_dc_ck = clk_get(&pdev->dev, "lb_ck");
328 if (IS_ERR(usb_dc_ck)) {
329 clk_put(usb_host_ck);
330 return PTR_ERR(usb_dc_ck);
334 hcd = usb_create_hcd (driver, &pdev->dev, dev_name(&pdev->dev));
339 hcd->rsrc_start = pdev->resource[0].start;
340 hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
342 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
343 dev_dbg(&pdev->dev, "request_mem_region failed\n");
348 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
350 dev_err(&pdev->dev, "can't ioremap OHCI HCD\n");
355 ohci = hcd_to_ohci(hcd);
358 host_initialized = 0;
361 irq = platform_get_irq(pdev, 0);
366 retval = usb_add_hcd(hcd, irq, 0);
370 host_initialized = 1;
373 omap_ohci_clock_power(0);
379 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
384 clk_put(usb_host_ck);
389 /* may be called with controller, bus, and devices active */
392 * usb_hcd_omap_remove - shutdown processing for OMAP-based HCDs
393 * @dev: USB Host Controller being removed
394 * Context: !in_interrupt()
396 * Reverses the effect of usb_hcd_omap_probe(), first invoking
397 * the HCD's stop() method. It is always called from a thread
398 * context, normally "rmmod", "apmd", or something similar.
401 usb_hcd_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev)
403 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
406 if (ohci->transceiver) {
407 (void) otg_set_host(ohci->transceiver, 0);
408 put_device(ohci->transceiver->dev);
410 if (machine_is_omap_osk())
413 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
416 clk_put(usb_host_ck);
419 /*-------------------------------------------------------------------------*/
422 ohci_omap_start (struct usb_hcd *hcd)
424 struct omap_usb_config *config;
425 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
430 config = hcd->self.controller->platform_data;
431 if (config->otg || config->rwc) {
432 ohci->hc_control = OHCI_CTRL_RWC;
433 writel(OHCI_CTRL_RWC, &ohci->regs->control);
436 if ((ret = ohci_run (ohci)) < 0) {
437 dev_err(hcd->self.controller, "can't start\n");
444 /*-------------------------------------------------------------------------*/
446 static const struct hc_driver ohci_omap_hc_driver = {
447 .description = hcd_name,
448 .product_desc = "OMAP OHCI",
449 .hcd_priv_size = sizeof(struct ohci_hcd),
452 * generic hardware linkage
455 .flags = HCD_USB11 | HCD_MEMORY,
458 * basic lifecycle operations
460 .reset = ohci_omap_init,
461 .start = ohci_omap_start,
462 .stop = ohci_omap_stop,
463 .shutdown = ohci_shutdown,
466 * managing i/o requests and associated device resources
468 .urb_enqueue = ohci_urb_enqueue,
469 .urb_dequeue = ohci_urb_dequeue,
470 .endpoint_disable = ohci_endpoint_disable,
475 .get_frame_number = ohci_get_frame,
480 .hub_status_data = ohci_hub_status_data,
481 .hub_control = ohci_hub_control,
483 .bus_suspend = ohci_bus_suspend,
484 .bus_resume = ohci_bus_resume,
486 .start_port_reset = ohci_start_port_reset,
489 /*-------------------------------------------------------------------------*/
491 static int ohci_hcd_omap_drv_probe(struct platform_device *dev)
493 return usb_hcd_omap_probe(&ohci_omap_hc_driver, dev);
496 static int ohci_hcd_omap_drv_remove(struct platform_device *dev)
498 struct usb_hcd *hcd = platform_get_drvdata(dev);
500 usb_hcd_omap_remove(hcd, dev);
501 platform_set_drvdata(dev, NULL);
506 /*-------------------------------------------------------------------------*/
510 static int ohci_omap_suspend(struct platform_device *dev, pm_message_t message)
512 struct ohci_hcd *ohci = hcd_to_ohci(platform_get_drvdata(dev));
514 if (time_before(jiffies, ohci->next_statechange))
516 ohci->next_statechange = jiffies;
518 omap_ohci_clock_power(0);
519 ohci_to_hcd(ohci)->state = HC_STATE_SUSPENDED;
523 static int ohci_omap_resume(struct platform_device *dev)
525 struct usb_hcd *hcd = platform_get_drvdata(dev);
526 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
528 if (time_before(jiffies, ohci->next_statechange))
530 ohci->next_statechange = jiffies;
532 omap_ohci_clock_power(1);
533 ohci_finish_controller_resume(hcd);
539 /*-------------------------------------------------------------------------*/
542 * Driver definition to register with the OMAP bus
544 static struct platform_driver ohci_hcd_omap_driver = {
545 .probe = ohci_hcd_omap_drv_probe,
546 .remove = ohci_hcd_omap_drv_remove,
547 .shutdown = usb_hcd_platform_shutdown,
549 .suspend = ohci_omap_suspend,
550 .resume = ohci_omap_resume,
553 .owner = THIS_MODULE,
558 MODULE_ALIAS("platform:ohci");