/* * OHCI HCD (Host Controller Driver) for USB. * * (C) Copyright 1999 Roman Weissgaerber * (C) Copyright 2000-2002 David Brownell * (C) Copyright 2002 Hewlett-Packard Company * * OMAP Bus Glue * * Written by Christopher Hoover * Based on fragments of previous driver by Rusell King et al. * * Modified for OMAP from ohci-sa1111.c by Tony Lindgren * Based on the 2.4 OMAP OHCI driver originally done by MontaVista Software Inc. * * This file is licenced under the GPL. */ #include #include #include #include #include #include #include #include "ohci-omap.h" #ifndef CONFIG_ARCH_OMAP #error "This file is OMAP bus glue. CONFIG_OMAP must be defined." #endif extern int usb_disabled(void); extern int ocpi_enable(void); /* * Use the first port only by default. Override with hmc_mode option. * * NOTE: Many OMAP-1510 Innovators supposedly have bad wiring for the USB ports * 1 & 2, so only port 0 will work. To use the OHCI on the first port, use * the Innovator USB client cable with a client-to-client connector and modify * either the cable or the hub to feed 5V VBUS back to Innovator. VBUS should * be the red lead in the cable. * * To mount USB hard disk as root, see the patch for do_mounts.c that tries * remounting the root, and use root=0801 if your root is on sda1. Does not * work with devfs. */ static int default_hmc_mode = 16; static int hmc_mode = 1234; /* * Set the USB host pin multiplexing and the selected HMC mode */ static int omap_usb_set_hmc_mode(int hmc_mode) { unsigned int val; switch (hmc_mode) { case 0: /* 0: function, 1: disabled, 2: disabled */ omap_cfg_reg(W4_USB_PUEN); omap_cfg_reg(R18_1510_USB_GPIO0); break; case 4: /* 0: function 1: host 2: host */ omap_cfg_reg(usb1_speed); omap_cfg_reg(usb1_susp); omap_cfg_reg(usb1_seo); omap_cfg_reg(usb1_txen); omap_cfg_reg(usb1_txd); omap_cfg_reg(usb1_vp); omap_cfg_reg(usb1_vm); omap_cfg_reg(usb1_rcv); omap_cfg_reg(usb2_susp); omap_cfg_reg(usb2_seo); omap_cfg_reg(usb2_txen); omap_cfg_reg(usb2_txd); omap_cfg_reg(usb2_vp); omap_cfg_reg(usb2_vm); omap_cfg_reg(usb2_rcv); break; case 16: /* 0: host, 1: disabled, 2: disabled */ omap_cfg_reg(W9_USB0_TXEN); omap_cfg_reg(AA9_USB0_VP); omap_cfg_reg(Y5_USB0_RCV); omap_cfg_reg(R9_USB0_VM); omap_cfg_reg(V6_USB0_TXD); omap_cfg_reg(W5_USB0_SE0); break; default: printk("Unknown USB host configuration: %i\n", hmc_mode); return -ENODEV; } /* Write the selected HMC mode */ val = readl(MOD_CONF_CTRL_0) & ~HMC_CLEAR; val |= (hmc_mode << 1); writel(val, MOD_CONF_CTRL_0); return 0; } /* * OHCI clock initialization for OMAP-1510 and 1610 */ static int omap_ohci_clock_power(int on) { if (on) { if (cpu_is_omap_1510()) { /* Use DPLL, not APLL */ writel(readl(ULPD_APLL_CTRL_REG) & ~APLL_NDPLL_SWITCH, ULPD_APLL_CTRL_REG); /* Enable DPLL */ writel(readl(ULPD_DPLL_CTRL_REG) | DPLL_PLL_ENABLE, ULPD_DPLL_CTRL_REG); /* Software request for USB 48MHz clock */ writel(readl(ULPD_SOFT_REQ_REG) | SOFT_REQ_REG_REQ, ULPD_SOFT_REQ_REG); while (!(readl(ULPD_DPLL_CTRL_REG) & DPLL_LOCK)); } if (cpu_is_omap_1610()) { /* Enable OHCI */ writel(readl(ULPD_SOFT_REQ_REG) | SOFT_USB_OTG_REQ, ULPD_SOFT_REQ_REG); /* USB host clock request if not using OTG */ writel(readl(ULPD_SOFT_REQ_REG) | SOFT_USB_REQ, ULPD_SOFT_REQ_REG); writel(readl(ULPD_STATUS_REQ_REG) | USB_HOST_DPLL_REQ, ULPD_STATUS_REQ_REG); } /* Enable 48MHz clock to USB */ writel(readl(ULPD_CLOCK_CTRL_REG) | USB_MCLK_EN, ULPD_CLOCK_CTRL_REG); writel(readl(ARM_IDLECT2) | (1 << EN_LBFREECK) | (1 << EN_LBCK), ARM_IDLECT2); writel(readl(MOD_CONF_CTRL_0) | USB_HOST_HHC_UHOST_EN, MOD_CONF_CTRL_0); } else { /* Disable 48MHz clock to USB */ writel(readl(ULPD_CLOCK_CTRL_REG) & ~USB_MCLK_EN, ULPD_CLOCK_CTRL_REG); /* FIXME: The DPLL stays on for now */ } return 0; } /* * Hardware specific transceiver power on/off */ static int omap_ohci_transceiver_power(int on) { if (on) { if (omap_is_innovator()) writel(readl(OMAP1510_FPGA_HOST_CTRL) | 0x20, OMAP1510_FPGA_HOST_CTRL); } else { if (omap_is_innovator()) writel(readl(OMAP1510_FPGA_HOST_CTRL) & ~0x20, OMAP1510_FPGA_HOST_CTRL); } return 0; } /* * OMAP-1510 specific Local Bus clock on/off */ static int omap_1510_local_bus_power(int on) { if (on) { writel((1 << 1) | (1 << 0), OMAP1510_LB_MMU_CTL); udelay(200); } else { writel(0, OMAP1510_LB_MMU_CTL); } return 0; } /* * OMAP-1510 specific Local Bus initialization * NOTE: This assumes 32MB memory size in OMAP1510LB_MEMSIZE. * See also arch/mach-omap/memory.h for __virt_to_bus() and * __bus_to_virt() which need to match with the physical * Local Bus address below. */ static int omap_1510_local_bus_init(void) { unsigned int tlb; unsigned long lbaddr, physaddr; writel((readl(OMAP1510_LB_CLOCK_DIV) & 0xfffffff8) | 0x4, OMAP1510_LB_CLOCK_DIV); /* Configure the Local Bus MMU table */ for (tlb = 0; tlb < OMAP1510_LB_MEMSIZE; tlb++) { lbaddr = tlb * 0x00100000 + OMAP1510_LB_OFFSET; physaddr = tlb * 0x00100000 + PHYS_OFFSET; writel((lbaddr & 0x0fffffff) >> 22, OMAP1510_LB_MMU_CAM_H); writel(((lbaddr & 0x003ffc00) >> 6) | 0xc, OMAP1510_LB_MMU_CAM_L); writel(physaddr >> 16, OMAP1510_LB_MMU_RAM_H); writel((physaddr & 0x0000fc00) | 0x300, OMAP1510_LB_MMU_RAM_L); writel(tlb << 4, OMAP1510_LB_MMU_LCK); writel(0x1, OMAP1510_LB_MMU_LD_TLB); } /* Enable the walking table */ writel(readl(OMAP1510_LB_MMU_CTL) | (1 << 3), OMAP1510_LB_MMU_CTL); udelay(200); return 0; } /* * OMAP-1610 specific hardware initialization * * Intended to configure OMAP-1610 USB host and OTG ports depending on * the HMC mode selected. * * FIXME: Currently only supports alternate ping group 2 mode, should * be easy to modify for other configurations once there is some * hardware to test with. */ static int omap_1610_usb_init(int mode) { u_int val = 0; /* Configure the OMAP transceiver settings */ val |= (1 << 8); /* CONF_USB2_UNI TRM p 15-205*/ val |= (4 << 4); /* TRM p 5-59, p 15-157 (1224) */ //val |= (1 << 3); /* Isolate integrated transceiver from port 0 */ val |= (1 << 2); /* Disable pulldown on integrated transceiver DM */ val |= (1 << 1); /* Disable pulldown on integraded transceiver DP */ writel(val, USB_TRANSCEIVER_CTRL); /* Set the USB0_TRX_MODE */ val = 0; val &= ~OTG_IDLE_EN; val &= ~DEV_IDLE_EN; val &= ~(7 << 16); /* Clear USB0_TRX_MODE */ val |= (3 << 16); /* 0 or 3, 6-wire DAT/SE0, TRM p 15-159 */ writel(val, OTG_SYSCON_1); /* * Control via OTG, see TRM p 15-163 */ val = 0; //val |= 1; /* REVISIT: Enable OTG = 1 */ /* Control via OTG */ val &= ~HMC_PADEN; val &= ~OTG_PADEN; val |= UHOST_EN; val &= ~0x3f; /* Clear HMC mode */ val |= mode; /* Set HMC mode */ val &= ~(7 << 16); /* Clear ASE0_BRST */ val |= (4 << 16); /* Must be 4 */ val |= USBX_SYNCHRO; /* Must be set */ val |= SRP_VBUS; writel(val, OTG_SYSCON_2); /* Enable OTG idle */ //writel(readl(OTG_SYSCON_1) | OTG_IDLE_EN, OTG_SYSCON_1); return 0; } /*-------------------------------------------------------------------------*/ static void omap_start_hc(struct omap_dev *dev) { printk(KERN_DEBUG __FILE__ ": starting OMAP OHCI USB Controller\n"); /* * Set the HMC mode for the USB ports */ #if 0 /* See note about the Innovator wiring above */ if (omap_is_innovator()) hmc_mode = 4; /* 0: function 1: host 2: host */ #endif if (cpu_is_omap_1610()) ocpi_enable(); omap_usb_set_hmc_mode(hmc_mode); omap_ohci_clock_power(1); omap_ohci_transceiver_power(1); if (cpu_is_omap_1510()) { omap_1510_local_bus_power(1); omap_1510_local_bus_init(); } if (cpu_is_omap_1610()) omap_1610_usb_init(hmc_mode); //omap_enable_device(dev); } static void omap_stop_hc(struct omap_dev *dev) { printk(KERN_DEBUG __FILE__ ": stopping OMAP OHCI USB Controller\n"); /* * FIXME: Put the USB host controller into reset. */ /* * FIXME: Stop the USB clock. */ //omap_disable_device(dev); } /*-------------------------------------------------------------------------*/ static irqreturn_t usb_hcd_omap_hcim_irq (int irq, void *__hcd, struct pt_regs * r) { struct usb_hcd *hcd = __hcd; return usb_hcd_irq(irq, hcd, r); } /*-------------------------------------------------------------------------*/ void usb_hcd_omap_remove (struct usb_hcd *, struct omap_dev *); /* configure so an HC device and id are always provided */ /* always called with process context; sleeping is OK */ /** * usb_hcd_omap_probe - initialize OMAP-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. * * Store this function in the HCD's struct pci_driver as probe(). */ int usb_hcd_omap_probe (const struct hc_driver *driver, struct usb_hcd **hcd_out, struct omap_dev *dev) { int retval; struct usb_hcd *hcd = 0; if (!request_mem_region(dev->res.start, dev->res.end - dev->res.start + 1, hcd_name)) { dbg("request_mem_region failed"); return -EBUSY; } omap_start_hc(dev); hcd = driver->hcd_alloc (); if (hcd == NULL){ dbg ("hcd_alloc failed"); retval = -ENOMEM; goto err1; } hcd->driver = (struct hc_driver *) driver; hcd->description = driver->description; hcd->irq = dev->irq[0]; hcd->regs = dev->mapbase; hcd->self.controller = &dev->dev; retval = hcd_buffer_create (hcd); if (retval != 0) { dbg ("pool alloc fail"); goto err1; } retval = request_irq (hcd->irq, usb_hcd_omap_hcim_irq, SA_INTERRUPT, hcd->description, hcd); if (retval != 0) { dbg("request_irq failed"); retval = -EBUSY; goto err2; } info ("%s (OMAP) at 0x%p, irq %d\n", hcd->description, hcd->regs, hcd->irq); usb_bus_init (&hcd->self); hcd->self.op = &usb_hcd_operations; hcd->self.hcpriv = (void *) hcd; hcd->self.bus_name = "omap"; hcd->product_desc = "OMAP OHCI"; INIT_LIST_HEAD (&hcd->dev_list); usb_register_bus (&hcd->self); if ((retval = driver->start (hcd)) < 0) { usb_hcd_omap_remove(hcd, dev); return retval; } *hcd_out = hcd; return 0; err2: hcd_buffer_destroy (hcd); if (hcd) driver->hcd_free(hcd); err1: omap_stop_hc(dev); release_mem_region(dev->res.start, dev->res.end - dev->res.start + 1); return retval; } /* may be called without controller electrically present */ /* may be called with controller, bus, and devices active */ /** * usb_hcd_omap_remove - shutdown processing for OMAP-based HCDs * @dev: USB Host Controller being removed * Context: !in_interrupt() * * Reverses the effect of usb_hcd_omap_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_omap_remove (struct usb_hcd *hcd, struct omap_dev *dev) { struct usb_device *hub; void *base; info ("remove: %s, state %x", hcd->self.bus_name, hcd->state); if (in_interrupt ()) BUG (); hub = hcd->self.root_hub; hcd->state = USB_STATE_QUIESCING; dbg ("%s: roothub graceful disconnect", hcd->self.bus_name); usb_disconnect (&hub); hcd->driver->stop (hcd); hcd_buffer_destroy (hcd); hcd->state = USB_STATE_HALT; free_irq (hcd->irq, hcd); usb_deregister_bus (&hcd->self); base = hcd->regs; hcd->driver->hcd_free (hcd); omap_stop_hc(dev); release_mem_region(dev->res.start, dev->res.end - dev->res.start + 1); } /*-------------------------------------------------------------------------*/ static int __devinit ohci_omap_start (struct usb_hcd *hcd) { struct ohci_hcd *ohci = hcd_to_ohci (hcd); int ret; ohci->hcca = dma_alloc_consistent (hcd->self.controller, sizeof *ohci->hcca, &ohci->hcca_dma); if (!ohci->hcca) return -ENOMEM; memset (ohci->hcca, 0, sizeof (struct ohci_hcca)); if ((ret = ohci_mem_init (ohci)) < 0) { ohci_stop (hcd); return ret; } ohci->regs = hcd->regs; if (hc_reset (ohci) < 0) { ohci_stop (hcd); return -ENODEV; } if (hc_start (ohci) < 0) { err ("can't start %s", ohci->hcd.self.bus_name); ohci_stop (hcd); return -EBUSY; } create_debug_files (ohci); #ifdef DEBUG ohci_dump (ohci, 1); #endif return 0; } /*-------------------------------------------------------------------------*/ static const struct hc_driver ohci_omap_hc_driver = { .description = hcd_name, /* * generic hardware linkage */ .irq = ohci_irq, .flags = HCD_USB11, /* * basic lifecycle operations */ .start = ohci_omap_start, #ifdef CONFIG_PM /* suspend: ohci_omap_suspend, -- tbd */ /* resume: ohci_omap_resume, -- tbd */ #endif .stop = ohci_stop, /* * memory lifecycle (except per-request) */ .hcd_alloc = ohci_hcd_alloc, .hcd_free = ohci_hcd_free, /* * 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, }; /*-------------------------------------------------------------------------*/ static int ohci_hcd_omap_drv_probe(struct omap_dev *dev) { struct usb_hcd *hcd = NULL; int ret; if (usb_disabled()) return -ENODEV; ret = usb_hcd_omap_probe(&ohci_omap_hc_driver, &hcd, dev); if (ret == 0) omap_set_drvdata(dev, hcd); return ret; } static int ohci_hcd_omap_drv_remove(struct omap_dev *dev) { struct usb_hcd *hcd = omap_get_drvdata(dev); usb_hcd_omap_remove(hcd, dev); omap_set_drvdata(dev, NULL); return 0; } /* * Driver definition to register with the OMAP bus */ static struct omap_driver ohci_hcd_omap_driver = { .drv = { .name = OMAP_OHCI_NAME, }, .devid = OMAP_OCP_DEVID_USB, .busid = OMAP_BUS_OCP, .clocks = 0, .probe = ohci_hcd_omap_drv_probe, .remove = ohci_hcd_omap_drv_remove, }; /* Any dma_mask must be set for OHCI to work */ static u64 omap_dmamask = 0xffffffffUL; /* * Device definition to match the driver above */ static struct omap_dev ohci_hcd_omap_device = { .name = OMAP_OHCI_NAME, .devid = OMAP_OCP_DEVID_USB, .busid = OMAP_BUS_OCP, .mapbase = (void *)OMAP_OHCI_BASE, .dma_mask = &omap_dmamask, /* Needed only for OHCI */ .res = { .start = OMAP_OHCI_BASE, .end = OMAP_OHCI_BASE + OMAP_OHCI_SIZE, }, .irq = { INT_USB_HHC_1, }, }; static int __init ohci_hcd_omap_init (void) { int ret; dbg (DRIVER_INFO " (OMAP)"); dbg ("block sizes: ed %d td %d\n", sizeof (struct ed), sizeof (struct td)); if (hmc_mode < 0 || hmc_mode > 25) hmc_mode = default_hmc_mode; /* Register the driver with OMAP bus */ ret = omap_driver_register(&ohci_hcd_omap_driver); if (ret != 0) return -ENODEV; /* Register the device with OMAP bus */ ret = omap_device_register(&ohci_hcd_omap_device); if (ret != 0) { omap_driver_unregister(&ohci_hcd_omap_driver); return -ENODEV; } return ret; } MODULE_PARM(hmc_mode, "hmc_mode"); static void __exit ohci_hcd_omap_cleanup (void) { omap_device_unregister(&ohci_hcd_omap_device); omap_driver_unregister(&ohci_hcd_omap_driver); } module_init (ohci_hcd_omap_init); module_exit (ohci_hcd_omap_cleanup);