/* * 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 #include #include /* FIXME: for PSSR */ #include /* * UHC: USB Host Controller (OHCI-like) register definitions */ #define UHC_BASE_PHYS (0x4C000000) #define UHCREV __REG(0x4C000000) /* UHC HCI Spec Revision */ #define UHCHCON __REG(0x4C000004) /* UHC Host Control Register */ #define UHCCOMS __REG(0x4C000008) /* UHC Command Status Register */ #define UHCINTS __REG(0x4C00000C) /* UHC Interrupt Status Register */ #define UHCINTE __REG(0x4C000010) /* UHC Interrupt Enable */ #define UHCINTD __REG(0x4C000014) /* UHC Interrupt Disable */ #define UHCHCCA __REG(0x4C000018) /* UHC Host Controller Comm. Area */ #define UHCPCED __REG(0x4C00001C) /* UHC Period Current Endpt Descr */ #define UHCCHED __REG(0x4C000020) /* UHC Control Head Endpt Descr */ #define UHCCCED __REG(0x4C000024) /* UHC Control Current Endpt Descr */ #define UHCBHED __REG(0x4C000028) /* UHC Bulk Head Endpt Descr */ #define UHCBCED __REG(0x4C00002C) /* UHC Bulk Current Endpt Descr */ #define UHCDHEAD __REG(0x4C000030) /* UHC Done Head */ #define UHCFMI __REG(0x4C000034) /* UHC Frame Interval */ #define UHCFMR __REG(0x4C000038) /* UHC Frame Remaining */ #define UHCFMN __REG(0x4C00003C) /* UHC Frame Number */ #define UHCPERS __REG(0x4C000040) /* UHC Periodic Start */ #define UHCLS __REG(0x4C000044) /* UHC Low Speed Threshold */ #define UHCRHDA __REG(0x4C000048) /* UHC Root Hub Descriptor A */ #define UHCRHDA_NOCP (1 << 12) /* No over current protection */ #define UHCRHDA_OCPM (1 << 11) /* Over Current Protection Mode */ #define UHCRHDA_POTPGT(x) \ (((x) & 0xff) << 24) /* Power On To Power Good Time */ #define UHCRHDB __REG(0x4C00004C) /* UHC Root Hub Descriptor B */ #define UHCRHS __REG(0x4C000050) /* UHC Root Hub Status */ #define UHCRHPS1 __REG(0x4C000054) /* UHC Root Hub Port 1 Status */ #define UHCRHPS2 __REG(0x4C000058) /* UHC Root Hub Port 2 Status */ #define UHCRHPS3 __REG(0x4C00005C) /* UHC Root Hub Port 3 Status */ #define UHCSTAT __REG(0x4C000060) /* UHC Status Register */ #define UHCSTAT_UPS3 (1 << 16) /* USB Power Sense Port3 */ #define UHCSTAT_SBMAI (1 << 15) /* System Bus Master Abort Interrupt*/ #define UHCSTAT_SBTAI (1 << 14) /* System Bus Target Abort Interrupt*/ #define UHCSTAT_UPRI (1 << 13) /* USB Port Resume Interrupt */ #define UHCSTAT_UPS2 (1 << 12) /* USB Power Sense Port 2 */ #define UHCSTAT_UPS1 (1 << 11) /* USB Power Sense Port 1 */ #define UHCSTAT_HTA (1 << 10) /* HCI Target Abort */ #define UHCSTAT_HBA (1 << 8) /* HCI Buffer Active */ #define UHCSTAT_RWUE (1 << 7) /* HCI Remote Wake Up Event */ #define UHCHR __REG(0x4C000064) /* UHC Reset Register */ #define UHCHR_SSEP3 (1 << 11) /* Sleep Standby Enable for Port3 */ #define UHCHR_SSEP2 (1 << 10) /* Sleep Standby Enable for Port2 */ #define UHCHR_SSEP1 (1 << 9) /* Sleep Standby Enable for Port1 */ #define UHCHR_PCPL (1 << 7) /* Power control polarity low */ #define UHCHR_PSPL (1 << 6) /* Power sense polarity low */ #define UHCHR_SSE (1 << 5) /* Sleep Standby Enable */ #define UHCHR_UIT (1 << 4) /* USB Interrupt Test */ #define UHCHR_SSDC (1 << 3) /* Simulation Scale Down Clock */ #define UHCHR_CGR (1 << 2) /* Clock Generation Reset */ #define UHCHR_FHR (1 << 1) /* Force Host Controller Reset */ #define UHCHR_FSBIR (1 << 0) /* Force System Bus Iface Reset */ #define UHCHIE __REG(0x4C000068) /* UHC Interrupt Enable Register*/ #define UHCHIE_UPS3IE (1 << 14) /* Power Sense Port3 IntEn */ #define UHCHIE_UPRIE (1 << 13) /* Port Resume IntEn */ #define UHCHIE_UPS2IE (1 << 12) /* Power Sense Port2 IntEn */ #define UHCHIE_UPS1IE (1 << 11) /* Power Sense Port1 IntEn */ #define UHCHIE_TAIE (1 << 10) /* HCI Interface Transfer Abort Interrupt Enable*/ #define UHCHIE_HBAIE (1 << 8) /* HCI Buffer Active IntEn */ #define UHCHIE_RWIE (1 << 7) /* Remote Wake-up IntEn */ #define UHCHIT __REG(0x4C00006C) /* UHC Interrupt Test register */ #define PXA_UHC_MAX_PORTNUM 3 #define UHCRHPS(x) __REG2( 0x4C000050, (x)<<2 ) static struct clk *usb_clk; /* 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 ) { 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 ); UHCRHDA |= RH_A_NPS; } return 0; } extern int usb_disabled(void); /*-------------------------------------------------------------------------*/ static inline void pxa27x_setup_hc(struct pxaohci_platform_data *inf) { uint32_t uhchr = UHCHR; uint32_t uhcrhda = UHCRHDA; if (inf->flags & ENABLE_PORT1) uhchr &= ~UHCHR_SSEP1; if (inf->flags & ENABLE_PORT2) uhchr &= ~UHCHR_SSEP2; if (inf->flags & ENABLE_PORT3) uhchr &= ~UHCHR_SSEP3; if (inf->flags & POWER_CONTROL_LOW) uhchr |= UHCHR_PCPL; if (inf->flags & POWER_SENSE_LOW) uhchr |= UHCHR_PSPL; if (inf->flags & NO_OC_PROTECTION) uhcrhda |= UHCRHDA_NOCP; if (inf->flags & OC_MODE_PERPORT) uhcrhda |= UHCRHDA_OCPM; if (inf->power_on_delay) { uhcrhda &= ~UHCRHDA_POTPGT(0xff); uhcrhda |= UHCRHDA_POTPGT(inf->power_on_delay / 2); } UHCHR = uhchr; UHCRHDA = uhcrhda; } static int pxa27x_start_hc(struct device *dev) { int retval = 0; struct pxaohci_platform_data *inf; inf = dev->platform_data; clk_enable(usb_clk); UHCHR |= UHCHR_FHR; udelay(11); UHCHR &= ~UHCHR_FHR; UHCHR |= UHCHR_FSBIR; while (UHCHR & UHCHR_FSBIR) cpu_relax(); pxa27x_setup_hc(inf); if (inf->init) retval = inf->init(dev); if (retval < 0) return retval; UHCHR &= ~UHCHR_SSE; UHCHIE = (UHCHIE_UPRIE | UHCHIE_RWIE); /* Clear any OTG Pin Hold */ if (cpu_is_pxa27x() && (PSSR & PSSR_OTGPH)) PSSR |= PSSR_OTGPH; return 0; } static void pxa27x_stop_hc(struct device *dev) { struct pxaohci_platform_data *inf; inf = dev->platform_data; if (inf->exit) inf->exit(dev); UHCHR |= UHCHR_FHR; udelay(11); UHCHR &= ~UHCHR_FHR; UHCCOMS |= 1; udelay(10); clk_disable(usb_clk); } /*-------------------------------------------------------------------------*/ /* 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 *pdev) { int retval, irq; struct usb_hcd *hcd; struct pxaohci_platform_data *inf; struct resource *r; inf = pdev->dev.platform_data; if (!inf) return -ENODEV; irq = platform_get_irq(pdev, 0); if (irq < 0) { pr_err("no resource of IORESOURCE_IRQ"); return -ENXIO; } usb_clk = clk_get(&pdev->dev, "USBCLK"); if (IS_ERR(usb_clk)) return PTR_ERR(usb_clk); hcd = usb_create_hcd (driver, &pdev->dev, "pxa27x"); if (!hcd) return -ENOMEM; r = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!r) { pr_err("no resource of IORESOURCE_MEM"); retval = -ENXIO; goto err1; } hcd->rsrc_start = r->start; hcd->rsrc_len = resource_size(r); 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; } if ((retval = pxa27x_start_hc(&pdev->dev)) < 0) { pr_debug("pxa27x_start_hc failed"); goto err3; } /* Select Power Management Mode */ pxa27x_ohci_select_pmm(inf->port_mode); if (inf->power_budget) hcd->power_budget = inf->power_budget; ohci_hcd_init(hcd_to_ohci(hcd)); retval = usb_add_hcd(hcd, irq, IRQF_DISABLED); if (retval == 0) return retval; pxa27x_stop_hc(&pdev->dev); err3: iounmap(hcd->regs); err2: release_mem_region(hcd->rsrc_start, hcd->rsrc_len); err1: usb_put_hcd(hcd); clk_put(usb_clk); 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 *pdev) { usb_remove_hcd(hcd); pxa27x_stop_hc(&pdev->dev); iounmap(hcd->regs); release_mem_region(hcd->rsrc_start, hcd->rsrc_len); usb_put_hcd(hcd); clk_put(usb_clk); } /*-------------------------------------------------------------------------*/ 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, .shutdown = ohci_shutdown, /* * 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 platform_device *pdev) { pr_debug ("In ohci_hcd_pxa27x_drv_probe"); if (usb_disabled()) return -ENODEV; return usb_hcd_pxa27x_probe(&ohci_pxa27x_hc_driver, pdev); } static int ohci_hcd_pxa27x_drv_remove(struct platform_device *pdev) { struct usb_hcd *hcd = platform_get_drvdata(pdev); usb_hcd_pxa27x_remove(hcd, pdev); platform_set_drvdata(pdev, NULL); return 0; } #ifdef CONFIG_PM static int ohci_hcd_pxa27x_drv_suspend(struct platform_device *pdev, pm_message_t state) { struct usb_hcd *hcd = platform_get_drvdata(pdev); struct ohci_hcd *ohci = hcd_to_ohci(hcd); if (time_before(jiffies, ohci->next_statechange)) msleep(5); ohci->next_statechange = jiffies; pxa27x_stop_hc(&pdev->dev); hcd->state = HC_STATE_SUSPENDED; return 0; } static int ohci_hcd_pxa27x_drv_resume(struct platform_device *pdev) { struct usb_hcd *hcd = platform_get_drvdata(pdev); struct ohci_hcd *ohci = hcd_to_ohci(hcd); int status; if (time_before(jiffies, ohci->next_statechange)) msleep(5); ohci->next_statechange = jiffies; if ((status = pxa27x_start_hc(&pdev->dev)) < 0) return status; ohci_finish_controller_resume(hcd); return 0; } #endif /* work with hotplug and coldplug */ MODULE_ALIAS("platform:pxa27x-ohci"); static struct platform_driver ohci_hcd_pxa27x_driver = { .probe = ohci_hcd_pxa27x_drv_probe, .remove = ohci_hcd_pxa27x_drv_remove, .shutdown = usb_hcd_platform_shutdown, #ifdef CONFIG_PM .suspend = ohci_hcd_pxa27x_drv_suspend, .resume = ohci_hcd_pxa27x_drv_resume, #endif .driver = { .name = "pxa27x-ohci", .owner = THIS_MODULE, }, };