/* * OHCI HCD (Host Controller Driver) for USB. * * (C) Copyright 1999 Roman Weissgaerber * (C) Copyright 2000-2002 David Brownell * (C) Copyright 2002 Hewlett-Packard Company * * Bus Glue for pxa27x * * Written by Christopher Hoover * Based on fragments of previous driver by Russell King et al. * * Modified for LH7A404 from ohci-sa1111.c * by Durgesh Pattamatta * * Modified for pxa27x from ohci-lh7a404.c * by Nick Bane 26-8-2004 * * This file is licenced under the GPL. */ #include #include #include #include #define PMM_NPS_MODE 1 #define PMM_GLOBAL_MODE 2 #define PMM_PERPORT_MODE 3 #define PXA_UHC_MAX_PORTNUM 3 #define UHCRHPS(x) __REG2( 0x4C000050, (x)<<2 ) static int pxa27x_ohci_pmm_state; /* PMM_NPS_MODE -- PMM Non-power switching mode Ports are powered continuously. PMM_GLOBAL_MODE -- PMM global switching mode All ports are powered at the same time. PMM_PERPORT_MODE -- PMM per port switching mode Ports are powered individually. */ static int pxa27x_ohci_select_pmm( int mode ) { pxa27x_ohci_pmm_state = mode; switch ( mode ) { case PMM_NPS_MODE: UHCRHDA |= RH_A_NPS; break; case PMM_GLOBAL_MODE: UHCRHDA &= ~(RH_A_NPS & RH_A_PSM); break; case PMM_PERPORT_MODE: UHCRHDA &= ~(RH_A_NPS); UHCRHDA |= RH_A_PSM; /* Set port power control mask bits, only 3 ports. */ UHCRHDB |= (0x7<<17); break; default: printk( KERN_ERR "Invalid mode %d, set to non-power switch mode.\n", mode ); pxa27x_ohci_pmm_state = PMM_NPS_MODE; UHCRHDA |= RH_A_NPS; } return 0; } extern int usb_disabled(void); /*-------------------------------------------------------------------------*/ static void pxa27x_start_hc(struct platform_device *dev) { pxa_set_cken(CKEN10_USBHOST, 1); UHCHR |= UHCHR_FHR; udelay(11); UHCHR &= ~UHCHR_FHR; UHCHR |= UHCHR_FSBIR; while (UHCHR & UHCHR_FSBIR) cpu_relax(); /* This could be properly abstracted away through the device data the day more machines are supported and their differences can be figured out correctly. */ if (machine_is_mainstone()) { /* setup Port1 GPIO pin. */ pxa_gpio_mode( 88 | GPIO_ALT_FN_1_IN); /* USBHPWR1 */ pxa_gpio_mode( 89 | GPIO_ALT_FN_2_OUT); /* USBHPEN1 */ /* Set the Power Control Polarity Low and Power Sense Polarity Low to active low. Supply power to USB ports. */ UHCHR = (UHCHR | UHCHR_PCPL | UHCHR_PSPL) & ~(UHCHR_SSEP1 | UHCHR_SSEP2 | UHCHR_SSEP3 | UHCHR_SSE); pxa27x_ohci_pmm_state = PMM_PERPORT_MODE; } UHCHR &= ~UHCHR_SSE; UHCHIE = (UHCHIE_UPRIE | UHCHIE_RWIE); /* Clear any OTG Pin Hold */ if (PSSR & PSSR_OTGPH) PSSR |= PSSR_OTGPH; } static void pxa27x_stop_hc(struct platform_device *dev) { UHCHR |= UHCHR_FHR; udelay(11); UHCHR &= ~UHCHR_FHR; UHCCOMS |= 1; udelay(10); pxa_set_cken(CKEN10_USBHOST, 0); } /*-------------------------------------------------------------------------*/ /* configure so an HC device and id are always provided */ /* always called with process context; sleeping is OK */ /** * usb_hcd_pxa27x_probe - initialize pxa27x-based HCDs * Context: !in_interrupt() * * Allocates basic resources for this USB host controller, and * then invokes the start() method for the HCD associated with it * through the hotplug entry's driver_data. * */ int usb_hcd_pxa27x_probe (const struct hc_driver *driver, struct platform_device *dev) { int retval; struct usb_hcd *hcd; if (dev->resource[1].flags != IORESOURCE_IRQ) { pr_debug ("resource[1] is not IORESOURCE_IRQ"); return -ENOMEM; } hcd = usb_create_hcd (driver, &dev->dev, "pxa27x"); if (!hcd) return -ENOMEM; hcd->rsrc_start = dev->resource[0].start; hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1; if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { pr_debug("request_mem_region failed"); retval = -EBUSY; goto err1; } hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); if (!hcd->regs) { pr_debug("ioremap failed"); retval = -ENOMEM; goto err2; } pxa27x_start_hc(dev); /* Select Power Management Mode */ pxa27x_ohci_select_pmm(pxa27x_ohci_pmm_state); ohci_hcd_init(hcd_to_ohci(hcd)); retval = usb_add_hcd(hcd, dev->resource[1].start, SA_INTERRUPT); if (retval == 0) return retval; pxa27x_stop_hc(dev); iounmap(hcd->regs); err2: release_mem_region(hcd->rsrc_start, hcd->rsrc_len); err1: usb_put_hcd(hcd); return retval; } /* may be called without controller electrically present */ /* may be called with controller, bus, and devices active */ /** * usb_hcd_pxa27x_remove - shutdown processing for pxa27x-based HCDs * @dev: USB Host Controller being removed * Context: !in_interrupt() * * Reverses the effect of usb_hcd_pxa27x_probe(), first invoking * the HCD's stop() method. It is always called from a thread * context, normally "rmmod", "apmd", or something similar. * */ void usb_hcd_pxa27x_remove (struct usb_hcd *hcd, struct platform_device *dev) { usb_remove_hcd(hcd); pxa27x_stop_hc(dev); iounmap(hcd->regs); release_mem_region(hcd->rsrc_start, hcd->rsrc_len); usb_put_hcd(hcd); } /*-------------------------------------------------------------------------*/ static int __devinit ohci_pxa27x_start (struct usb_hcd *hcd) { struct ohci_hcd *ohci = hcd_to_ohci (hcd); int ret; ohci_dbg (ohci, "ohci_pxa27x_start, ohci:%p", ohci); /* The value of NDP in roothub_a is incorrect on this hardware */ ohci->num_ports = 3; if ((ret = ohci_init(ohci)) < 0) return ret; if ((ret = ohci_run (ohci)) < 0) { err ("can't start %s", hcd->self.bus_name); ohci_stop (hcd); return ret; } return 0; } /*-------------------------------------------------------------------------*/ static const struct hc_driver ohci_pxa27x_hc_driver = { .description = hcd_name, .product_desc = "PXA27x OHCI", .hcd_priv_size = sizeof(struct ohci_hcd), /* * generic hardware linkage */ .irq = ohci_irq, .flags = HCD_USB11 | HCD_MEMORY, /* * basic lifecycle operations */ .start = ohci_pxa27x_start, .stop = ohci_stop, /* * managing i/o requests and associated device resources */ .urb_enqueue = ohci_urb_enqueue, .urb_dequeue = ohci_urb_dequeue, .endpoint_disable = ohci_endpoint_disable, /* * scheduling support */ .get_frame_number = ohci_get_frame, /* * root hub support */ .hub_status_data = ohci_hub_status_data, .hub_control = ohci_hub_control, #ifdef CONFIG_PM .bus_suspend = ohci_bus_suspend, .bus_resume = ohci_bus_resume, #endif .start_port_reset = ohci_start_port_reset, }; /*-------------------------------------------------------------------------*/ static int ohci_hcd_pxa27x_drv_probe(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); int ret; pr_debug ("In ohci_hcd_pxa27x_drv_probe"); if (usb_disabled()) return -ENODEV; ret = usb_hcd_pxa27x_probe(&ohci_pxa27x_hc_driver, pdev); return ret; } static int ohci_hcd_pxa27x_drv_remove(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); struct usb_hcd *hcd = dev_get_drvdata(dev); usb_hcd_pxa27x_remove(hcd, pdev); return 0; } static int ohci_hcd_pxa27x_drv_suspend(struct device *dev, pm_message_t state) { // struct platform_device *pdev = to_platform_device(dev); // struct usb_hcd *hcd = dev_get_drvdata(dev); printk("%s: not implemented yet\n", __FUNCTION__); return 0; } static int ohci_hcd_pxa27x_drv_resume(struct device *dev) { // struct platform_device *pdev = to_platform_device(dev); // struct usb_hcd *hcd = dev_get_drvdata(dev); printk("%s: not implemented yet\n", __FUNCTION__); return 0; } static struct device_driver ohci_hcd_pxa27x_driver = { .name = "pxa27x-ohci", .bus = &platform_bus_type, .probe = ohci_hcd_pxa27x_drv_probe, .remove = ohci_hcd_pxa27x_drv_remove, .suspend = ohci_hcd_pxa27x_drv_suspend, .resume = ohci_hcd_pxa27x_drv_resume, }; static int __init ohci_hcd_pxa27x_init (void) { pr_debug (DRIVER_INFO " (pxa27x)"); pr_debug ("block sizes: ed %d td %d\n", sizeof (struct ed), sizeof (struct td)); return driver_register(&ohci_hcd_pxa27x_driver); } static void __exit ohci_hcd_pxa27x_cleanup (void) { driver_unregister(&ohci_hcd_pxa27x_driver); } module_init (ohci_hcd_pxa27x_init); module_exit (ohci_hcd_pxa27x_cleanup);