diff options
Diffstat (limited to 'drivers/usb/host/ehci-arc.c')
| -rw-r--r-- | drivers/usb/host/ehci-arc.c | 635 |
1 files changed, 635 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-arc.c b/drivers/usb/host/ehci-arc.c new file mode 100644 index 000000000000..dd2929f472e8 --- /dev/null +++ b/drivers/usb/host/ehci-arc.c @@ -0,0 +1,635 @@ +/* + * (C) Copyright David Brownell 2000-2002 + * Copyright (c) 2005 MontaVista Software + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * Ported to 834x by Randy Vinson <rvinson@mvista.com> using code provided + * by Hunter Wu. + */ + +#include <linux/platform_device.h> +#include <linux/fsl_devices.h> +#include <linux/usb/otg.h> + +#include "ehci-fsl.h" + +extern struct resource *otg_get_resources(void); + +#undef EHCI_PROC_PTC +#ifdef EHCI_PROC_PTC /* /proc PORTSC:PTC support */ +/* + * write a PORTSC:PTC value to /proc/driver/ehci-ptc + * to put the controller into test mode. + */ +#include <linux/proc_fs.h> +#include <asm/uaccess.h> +#define EFPSL 3 /* ehci fsl proc string length */ + +static int ehci_fsl_proc_read(char *page, char **start, off_t off, int count, + int *eof, void *data) +{ + return 0; +} + +static int ehci_fsl_proc_write(struct file *file, const char __user *buffer, + unsigned long count, void *data) +{ + int ptc; + u32 portsc; + struct ehci_hcd *ehci = (struct ehci_hcd *) data; + char str[EFPSL] = {0}; + + if (count > EFPSL-1) + return -EINVAL; + + if (copy_from_user(str, buffer, count)) + return -EFAULT; + + str[count] = '\0'; + + ptc = simple_strtoul(str, NULL, 0); + + portsc = ehci_readl(ehci, &ehci->regs->port_status[0]); + portsc &= ~(0xf << 16); + portsc |= (ptc << 16); + printk(KERN_INFO "PTC %x portsc %08x\n", ptc, portsc); + + ehci_writel(ehci, portsc, &ehci->regs->port_status[0]); + + return count; +} + +static int ehci_testmode_init(struct ehci_hcd *ehci) +{ + struct proc_dir_entry *entry; + + entry = create_proc_read_entry("driver/ehci-ptc", 0644, NULL, + ehci_fsl_proc_read, ehci); + if (!entry) + return -ENODEV; + + entry->write_proc = ehci_fsl_proc_write; + return 0; +} +#else +static int ehci_testmode_init(struct ehci_hcd *ehci) +{ + return 0; +} +#endif /* /proc PORTSC:PTC support */ + + +/* PCI-based HCs are common, but plenty of non-PCI HCs are used too */ + +/* configure so an HC device and id are always provided */ +/* always called with process context; sleeping is OK */ + +/** + * usb_hcd_fsl_probe - initialize FSL-based HCDs + * @drvier: Driver to be used for this HCD + * @pdev: USB Host Controller being probed + * Context: !in_interrupt() + * + * Allocates basic resources for this USB host controller. + * + */ +static int usb_hcd_fsl_probe(const struct hc_driver *driver, + struct platform_device *pdev) +{ + struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data; + struct usb_hcd *hcd; + struct resource *res; + int irq; + int retval; + + pr_debug("initializing FSL-SOC USB Controller\n"); + + /* Need platform data for setup */ + if (!pdata) { + dev_err(&pdev->dev, + "No platform data for %s.\n", pdev->dev.bus_id); + return -ENODEV; + } + + /* + * This is a host mode driver, verify that we're supposed to be + * in host mode. + */ + if (!((pdata->operating_mode == FSL_USB2_DR_HOST) || + (pdata->operating_mode == FSL_USB2_MPH_HOST) || + (pdata->operating_mode == FSL_USB2_DR_OTG))) { + dev_err(&pdev->dev, + "Non Host Mode configured for %s. " + "Wrong driver linked.\n", pdev->dev.bus_id); + return -ENODEV; + } + + hcd = usb_create_hcd(driver, &pdev->dev, pdev->dev.bus_id); + if (!hcd) { + retval = -ENOMEM; + goto err1; + } + +#if defined(CONFIG_USB_OTG) + if (pdata->operating_mode == FSL_USB2_DR_OTG) { + res = otg_get_resources(); + if (!res) { + dev_err(&pdev->dev, + "Found HC with no IRQ. Check %s setup!\n", + pdev->dev.bus_id); + return -ENODEV; + } + irq = res[1].start; + hcd->rsrc_start = res[0].start; + hcd->rsrc_len = res[0].end - res[0].start + 1; + } else +#endif + { + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (!res) { + dev_err(&pdev->dev, + "Found HC with no IRQ. Check %s setup!\n", + pdev->dev.bus_id); + return -ENODEV; + } + irq = res->start; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + hcd->rsrc_start = res->start; + hcd->rsrc_len = resource_size(res); + + if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, + driver->description)) { + dev_dbg(&pdev->dev, "controller already in use\n"); + retval = -EBUSY; + goto err2; + } + } + + hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); + + if (hcd->regs == NULL) { + dev_dbg(&pdev->dev, "error mapping memory\n"); + retval = -EFAULT; + goto err3; + } + pdata->regs = hcd->regs; + + /* + * do platform specific init: check the clock, grab/config pins, etc. + */ + if (pdata->platform_init && pdata->platform_init(pdev)) { + retval = -ENODEV; + goto err3; + } + + fsl_platform_set_host_mode(hcd); + hcd->power_budget = pdata->power_budget; + + retval = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED); + if (retval != 0) + goto err4; + + fsl_platform_set_vbus_power(pdata, 1); + +#ifdef CONFIG_USB_OTG + if (pdata->operating_mode == FSL_USB2_DR_OTG) { + struct ehci_hcd *ehci = hcd_to_ehci(hcd); + + dbg("pdev=0x%p hcd=0x%p ehci=0x%p\n", pdev, hcd, ehci); + + ehci->transceiver = otg_get_transceiver(); + dbg("ehci->transceiver=0x%p\n", ehci->transceiver); + + if (ehci->transceiver) { + retval = otg_set_host(ehci->transceiver, + &ehci_to_hcd(ehci)->self); + if (retval) { + if (ehci->transceiver) + put_device(ehci->transceiver->dev); + goto err4; + } + } else { + printk(KERN_ERR "can't find transceiver\n"); + retval = -ENODEV; + goto err4; + } + } +#endif + + if (pdata->suspended) { + pdata->suspended = 0; + if (pdata->already_suspended) + pdata->already_suspended = 0; + } + + fsl_platform_set_ahb_burst(hcd); + ehci_testmode_init(hcd_to_ehci(hcd)); + return retval; + +err4: + iounmap(hcd->regs); +err3: + if (pdata->operating_mode != FSL_USB2_DR_OTG) + release_mem_region(hcd->rsrc_start, hcd->rsrc_len); +err2: + usb_put_hcd(hcd); +err1: + dev_err(&pdev->dev, "init %s fail, %d\n", pdev->dev.bus_id, retval); + if (pdata->platform_uninit) + pdata->platform_uninit(pdata); + return retval; +} + +/* may be called without controller electrically present */ +/* may be called with controller, bus, and devices active */ + +/** + * usb_hcd_fsl_remove - shutdown processing for FSL-based HCDs + * @dev: USB Host Controller being removed + * Context: !in_interrupt() + * + * Reverses the effect of usb_hcd_fsl_probe(). + * + */ +static void usb_hcd_fsl_remove(struct usb_hcd *hcd, + struct platform_device *pdev) +{ + struct ehci_hcd *ehci = hcd_to_ehci(hcd); + struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data; + + /* DDD shouldn't we turn off the power here? */ + fsl_platform_set_vbus_power(pdata, 0); + + if (ehci->transceiver) { + (void)otg_set_host(ehci->transceiver, 0); + put_device(ehci->transceiver->dev); + } else { + release_mem_region(hcd->rsrc_start, hcd->rsrc_len); + } + + usb_remove_hcd(hcd); + usb_put_hcd(hcd); + + /* + * do platform specific un-initialization: + * release iomux pins, etc. + */ + if (pdata->platform_uninit) + pdata->platform_uninit(pdata); + + iounmap(hcd->regs); +} + +static void fsl_setup_phy(struct ehci_hcd *ehci, + enum fsl_usb2_phy_modes phy_mode, int port_offset) +{ + u32 portsc; + + portsc = ehci_readl(ehci, &ehci->regs->port_status[port_offset]); + portsc &= ~(PORT_PTS_MSK | PORT_PTS_PTW); + + switch (phy_mode) { + case FSL_USB2_PHY_ULPI: + portsc |= PORT_PTS_ULPI; + break; + case FSL_USB2_PHY_SERIAL: + portsc |= PORT_PTS_SERIAL; + break; + case FSL_USB2_PHY_UTMI_WIDE: + portsc |= PORT_PTS_PTW; + /* fall through */ + case FSL_USB2_PHY_UTMI: + portsc |= PORT_PTS_UTMI; + break; + case FSL_USB2_PHY_NONE: + break; + } + ehci_writel(ehci, portsc, &ehci->regs->port_status[port_offset]); +} + +/* called after powerup, by probe or system-pm "wakeup" */ +static int ehci_fsl_reinit(struct ehci_hcd *ehci) +{ + fsl_platform_usb_setup(ehci); + ehci_port_power(ehci, 0); + return 0; +} + +/* called during probe() after chip reset completes */ +static int ehci_fsl_setup(struct usb_hcd *hcd) +{ + struct ehci_hcd *ehci = hcd_to_ehci(hcd); + int retval; + struct fsl_usb2_platform_data *pdata; + pdata = hcd->self.controller->platform_data; + + ehci->big_endian_desc = pdata->big_endian_desc; + ehci->big_endian_mmio = pdata->big_endian_mmio; + + /* EHCI registers start at offset 0x100 */ + ehci->caps = hcd->regs + 0x100; + ehci->regs = hcd->regs + 0x100 + + HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase)); + dbg_hcs_params(ehci, "reset"); + dbg_hcc_params(ehci, "reset"); + + /* cache this readonly data; minimize chip reads */ + ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); + + retval = ehci_halt(ehci); + + /* data structure init */ + retval = ehci_init(hcd); + if (retval) + return retval; + + hcd->has_tt = 1; + + ehci->sbrn = 0x20; + + ehci_reset(ehci); + + retval = ehci_fsl_reinit(ehci); + return retval; +} + +static const struct hc_driver ehci_fsl_hc_driver = { + .description = hcd_name, + .product_desc = "Freescale On-Chip EHCI Host Controller", + .hcd_priv_size = sizeof(struct ehci_hcd), + + /* + * generic hardware linkage + */ + .irq = ehci_irq, + .flags = FSL_PLATFORM_HC_FLAGS, + + /* + * basic lifecycle operations + */ + .reset = ehci_fsl_setup, + .start = ehci_run, + .stop = ehci_stop, + .shutdown = ehci_shutdown, + + /* + * managing i/o requests and associated device resources + */ + .urb_enqueue = ehci_urb_enqueue, + .urb_dequeue = ehci_urb_dequeue, + .endpoint_disable = ehci_endpoint_disable, + + /* + * scheduling support + */ + .get_frame_number = ehci_get_frame, + + /* + * root hub support + */ + .hub_status_data = ehci_hub_status_data, + .hub_control = ehci_hub_control, + .bus_suspend = ehci_bus_suspend, + .bus_resume = ehci_bus_resume, + .start_port_reset = ehci_start_port_reset, +}; + +static int ehci_fsl_drv_probe(struct platform_device *pdev) +{ + if (usb_disabled()) + return -ENODEV; + + return usb_hcd_fsl_probe(&ehci_fsl_hc_driver, pdev); +} + +static int ehci_fsl_drv_remove(struct platform_device *pdev) +{ + struct usb_hcd *hcd = platform_get_drvdata(pdev); + + usb_hcd_fsl_remove(hcd, pdev); + return 0; +} + +static void ehci_fsl_drv_shutdown(struct platform_device *pdev) +{ + usb_hcd_platform_shutdown(pdev); +} + +#ifdef CONFIG_PM +extern void usb_host_set_wakeup(struct device *wkup_dev, bool para); +/* suspend/resume, section 4.3 */ + +/* These routines rely on the bus (pci, platform, etc) + * to handle powerdown and wakeup, and currently also on + * transceivers that don't need any software attention to set up + * the right sort of wakeup. + * + * They're also used for turning on/off the port when doing OTG. + */ +static int ehci_fsl_drv_suspend(struct platform_device *pdev, + pm_message_t message) +{ + struct usb_hcd *hcd = platform_get_drvdata(pdev); + struct ehci_hcd *ehci = hcd_to_ehci(hcd); + u32 tmp, port_status; + struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data; + +#ifdef DEBUG + u32 mode = ehci_readl(ehci, hcd->regs + FSL_SOC_USB_USBMODE); + mode &= USBMODE_CM_MASK; + tmp = ehci_readl(ehci, hcd->regs + 0x140); /* usbcmd */ + + printk(KERN_DEBUG "%s('%s'): suspend=%d already_suspended=%d " + "mode=%d usbcmd %08x\n", __func__, pdata->name, + pdata->suspended, pdata->already_suspended, mode, tmp); +#endif + + /* + * If the controller is already suspended, then this must be a + * PM suspend. Remember this fact, so that we will leave the + * controller suspended at PM resume time. + */ + if (pdata->suspended) { + pr_debug("%s: already suspended, leaving early\n", __func__); + pdata->already_suspended = 1; + return 0; + } + + pr_debug("%s: suspending...\n", __func__); + + printk(KERN_INFO "USB Host suspended\n"); + + port_status = ehci_readl(ehci, &ehci->regs->port_status[0]); + hcd->state = HC_STATE_SUSPENDED; + pdev->dev.power.power_state = PMSG_SUSPEND; + + /* ignore non-host interrupts */ + clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); + + /* stop the controller */ + tmp = ehci_readl(ehci, &ehci->regs->command); + tmp &= ~CMD_RUN; + ehci_writel(ehci, tmp, &ehci->regs->command); + + /* save EHCI registers */ + pdata->pm_command = ehci_readl(ehci, &ehci->regs->command); + pdata->pm_command &= ~CMD_RUN; + pdata->pm_status = ehci_readl(ehci, &ehci->regs->status); + pdata->pm_intr_enable = ehci_readl(ehci, &ehci->regs->intr_enable); + pdata->pm_frame_index = ehci_readl(ehci, &ehci->regs->frame_index); + pdata->pm_segment = ehci_readl(ehci, &ehci->regs->segment); + pdata->pm_frame_list = ehci_readl(ehci, &ehci->regs->frame_list); + pdata->pm_async_next = ehci_readl(ehci, &ehci->regs->async_next); + pdata->pm_configured_flag = + ehci_readl(ehci, &ehci->regs->configured_flag); + pdata->pm_portsc = ehci_readl(ehci, &ehci->regs->port_status[0]); + + /* clear the W1C bits */ + pdata->pm_portsc &= cpu_to_hc32(ehci, ~PORT_RWC_BITS); + + pdata->suspended = 1; + + if (!device_may_wakeup(&(pdev->dev))) { + /* clear PP to cut power to the port */ + tmp = ehci_readl(ehci, &ehci->regs->port_status[0]); + tmp &= ~PORT_POWER; + ehci_writel(ehci, tmp, &ehci->regs->port_status[0]); + return 0; + } + + /* device_may_wakeup */ + if (!((ehci->transceiver) && + (readl(hcd->regs + 0x1A4) & (1 << 8)))) { + /* enable remote wake up irq */ + usb_host_set_wakeup(&(pdev->dev), true); + + /* We CAN NOT enable wake up by connetion and disconnection + * concurrently */ + tmp = ehci_readl(ehci, &ehci->regs->port_status[0]); + /* if there is no usb device connectted */ + if (port_status & PORT_CONNECT) { + /* enable wake up by usb device disconnection */ + tmp |= PORT_WKDISC_E; + tmp &= ~(PORT_WKOC_E | PORT_WKCONN_E); + } else { + /* enable wake up by usb device insertion */ + tmp |= PORT_WKCONN_E; + tmp &= ~(PORT_WKOC_E | PORT_WKDISC_E); + } + ehci_writel(ehci, tmp, &ehci->regs->port_status[0]); + + /* Set the port into suspend */ + tmp = ehci_readl(ehci, &ehci->regs->port_status[0]); + tmp |= PORT_SUSPEND; + ehci_writel(ehci, tmp, &ehci->regs->port_status[0]); + + /* Disable PHY clock */ + tmp = ehci_readl(ehci, &ehci->regs->port_status[0]); + tmp |= (1 << 23); + ehci_writel(ehci, tmp, &ehci->regs->port_status[0]); + } + + if (pdata->platform_suspend) + pdata->platform_suspend(pdata); + + return 0; +} + +static int ehci_fsl_drv_resume(struct platform_device *pdev) +{ + struct usb_hcd *hcd = platform_get_drvdata(pdev); + struct ehci_hcd *ehci = hcd_to_ehci(hcd); + u32 tmp; + struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data; + + pr_debug("%s('%s'): suspend=%d already_suspended=%d\n", __func__, + pdata->name, pdata->suspended, pdata->already_suspended); + + /* + * If the controller was already suspended at suspend time, + * then don't resume it now. + */ + if (pdata->already_suspended) { + pr_debug("already suspended, leaving early\n"); + pdata->already_suspended = 0; + return 0; + } + + if (!pdata->suspended) { + pr_debug("not suspended, leaving early\n"); + return 0; + } + + if (device_may_wakeup(&(pdev->dev))) { + tmp = ehci_readl(ehci, &ehci->regs->port_status[0]); + if (tmp & (1 << 23)) { + tmp &= ~(1 << 23); + ehci_writel(ehci, tmp, &ehci->regs->port_status[0]); + msleep(10); + } + } + + pdata->suspended = 0; + + pr_debug("%s resuming...\n", __func__); + + /* set host mode */ + fsl_platform_set_host_mode(hcd); + + if (pdata->platform_resume) + pdata->platform_resume(pdata); + + /* restore EHCI registers */ + ehci_writel(ehci, pdata->pm_command, &ehci->regs->command); + ehci_writel(ehci, pdata->pm_intr_enable, &ehci->regs->intr_enable); + ehci_writel(ehci, pdata->pm_frame_index, &ehci->regs->frame_index); + ehci_writel(ehci, pdata->pm_segment, &ehci->regs->segment); + ehci_writel(ehci, pdata->pm_frame_list, &ehci->regs->frame_list); + ehci_writel(ehci, pdata->pm_async_next, &ehci->regs->async_next); + ehci_writel(ehci, pdata->pm_configured_flag, + &ehci->regs->configured_flag); + ehci_writel(ehci, pdata->pm_portsc, &ehci->regs->port_status[0]); + + set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); + hcd->state = HC_STATE_RUNNING; + pdev->dev.power.power_state = PMSG_ON; + + tmp = ehci_readl(ehci, &ehci->regs->command); + tmp |= CMD_RUN; + ehci_writel(ehci, tmp, &ehci->regs->command); + + usb_hcd_resume_root_hub(hcd); + + printk(KERN_INFO "USB Host resumed\n"); + return 0; +} +#endif /* CONFIG_USB_OTG */ + +MODULE_ALIAS("fsl-ehci"); + +static struct platform_driver ehci_fsl_driver = { + .probe = ehci_fsl_drv_probe, + .remove = ehci_fsl_drv_remove, + .shutdown = ehci_fsl_drv_shutdown, +#ifdef CONFIG_PM + .suspend = ehci_fsl_drv_suspend, + .resume = ehci_fsl_drv_resume, +#endif + .driver = { + .name = "fsl-ehci", + }, +}; 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