/* * Copyright 2005-2009 MontaVista Software, Inc. * Copyright 2008 Freescale Semiconductor, Inc. * * 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. * Power Management support by Dave Liu <daveliu@freescale.com>, * Jerry Huang <Chang-Ming.Huang@freescale.com> and * Anton Vorontsov <avorontsov@ru.mvista.com>. */ #include <linux/kernel.h> #include <linux/types.h> #include <linux/delay.h> #include <linux/pm.h> #include <linux/platform_device.h> #include <linux/fsl_devices.h> #include "ehci-fsl.h" /* 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; struct usb_hcd *hcd; struct resource *res; int irq; int retval; pr_debug("initializing FSL-SOC USB Controller\n"); /* Need platform data for setup */ pdata = (struct fsl_usb2_platform_data *)pdev->dev.platform_data; if (!pdata) { dev_err(&pdev->dev, "No platform data for %s.\n", dev_name(&pdev->dev)); 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", dev_name(&pdev->dev)); return -ENODEV; } res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); if (!res) { dev_err(&pdev->dev, "Found HC with no IRQ. Check %s setup!\n", dev_name(&pdev->dev)); return -ENODEV; } irq = res->start; hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev)); if (!hcd) { retval = -ENOMEM; goto err1; } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { dev_err(&pdev->dev, "Found HC with no register addr. Check %s setup!\n", dev_name(&pdev->dev)); retval = -ENODEV; goto err2; } 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; if (pdata->power_budget) hcd->power_budget = pdata->power_budget; /* * do platform specific init: check the clock, grab/config pins, etc. */ if (pdata->init && pdata->init(pdev)) { retval = -ENODEV; goto err3; } /* Enable USB controller, 83xx or 8536 */ if (pdata->have_sysif_regs) setbits32(hcd->regs + FSL_SOC_USB_CTRL, 0x4); /* Don't need to set host mode here. It will be done by tdi_reset() */ retval = usb_add_hcd(hcd, irq, IRQF_SHARED); if (retval != 0) goto err4; #ifdef CONFIG_USB_OTG if (pdata->operating_mode == FSL_USB2_DR_OTG) { struct ehci_hcd *ehci = hcd_to_ehci(hcd); ehci->transceiver = otg_get_transceiver(); dev_dbg(&pdev->dev, "hcd=0x%p ehci=0x%p, transceiver=0x%p\n", hcd, ehci, 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 { dev_err(&pdev->dev, "can't find transceiver\n"); retval = -ENODEV; goto err4; } } #endif return retval; err4: iounmap(hcd->regs); err3: release_mem_region(hcd->rsrc_start, hcd->rsrc_len); err2: usb_put_hcd(hcd); err1: dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), retval); if (pdata->exit) pdata->exit(pdev); 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 fsl_usb2_platform_data *pdata = pdev->dev.platform_data; struct ehci_hcd *ehci = hcd_to_ehci(hcd); if (ehci->transceiver) { otg_set_host(ehci->transceiver, NULL); put_device(ehci->transceiver->dev); } usb_remove_hcd(hcd); /* * do platform specific un-initialization: * release iomux pins, disable clock, etc. */ if (pdata->exit) pdata->exit(pdev); iounmap(hcd->regs); release_mem_region(hcd->rsrc_start, hcd->rsrc_len); usb_put_hcd(hcd); } static void ehci_fsl_setup_phy(struct ehci_hcd *ehci, enum fsl_usb2_phy_modes phy_mode, unsigned 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]); } static void ehci_fsl_usb_setup(struct ehci_hcd *ehci) { struct usb_hcd *hcd = ehci_to_hcd(ehci); struct fsl_usb2_platform_data *pdata; void __iomem *non_ehci = hcd->regs; u32 temp; pdata = hcd->self.controller->platform_data; /* Enable PHY interface in the control reg. */ if (pdata->have_sysif_regs) { temp = in_be32(non_ehci + FSL_SOC_USB_CTRL); out_be32(non_ehci + FSL_SOC_USB_CTRL, temp | 0x00000004); out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0000001b); } #if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) /* * Turn on cache snooping hardware, since some PowerPC platforms * wholly rely on hardware to deal with cache coherent */ /* Setup Snooping for all the 4GB space */ /* SNOOP1 starts from 0x0, size 2G */ out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0 | SNOOP_SIZE_2GB); /* SNOOP2 starts from 0x80000000, size 2G */ out_be32(non_ehci + FSL_SOC_USB_SNOOP2, 0x80000000 | SNOOP_SIZE_2GB); #endif if ((pdata->operating_mode == FSL_USB2_DR_HOST) || (pdata->operating_mode == FSL_USB2_DR_OTG)) ehci_fsl_setup_phy(ehci, pdata->phy_mode, 0); if (pdata->operating_mode == FSL_USB2_MPH_HOST) { unsigned int chip, rev, svr; svr = mfspr(SPRN_SVR); chip = svr >> 16; rev = (svr >> 4) & 0xf; /* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */ if ((rev == 1) && (chip >= 0x8050) && (chip <= 0x8055)) ehci->has_fsl_port_bug = 1; if (pdata->port_enables & FSL_USB2_PORT0_ENABLED) ehci_fsl_setup_phy(ehci, pdata->phy_mode, 0); if (pdata->port_enables & FSL_USB2_PORT1_ENABLED) ehci_fsl_setup_phy(ehci, pdata->phy_mode, 1); } if (pdata->have_sysif_regs) { #ifdef CONFIG_PPC_85xx out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x00000008); out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000080); #else out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x0000000c); out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000040); #endif out_be32(non_ehci + FSL_SOC_USB_SICTRL, 0x00000001); } } /* called after powerup, by probe or system-pm "wakeup" */ static int ehci_fsl_reinit(struct ehci_hcd *ehci) { ehci_fsl_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, 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); hcd->has_tt = 1; retval = ehci_halt(ehci); if (retval) return retval; /* data structure init */ retval = ehci_init(hcd); if (retval) return retval; ehci->sbrn = 0x20; ehci_reset(ehci); retval = ehci_fsl_reinit(ehci); return retval; } struct ehci_fsl { struct ehci_hcd ehci; #ifdef CONFIG_PM /* Saved USB PHY settings, need to restore after deep sleep. */ u32 usb_ctrl; #endif }; #ifdef CONFIG_PM #ifdef CONFIG_PPC_MPC512x static int ehci_fsl_mpc512x_drv_suspend(struct device *dev) { struct usb_hcd *hcd = dev_get_drvdata(dev); struct ehci_hcd *ehci = hcd_to_ehci(hcd); struct fsl_usb2_platform_data *pdata = dev->platform_data; u32 tmp; #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 */ dev_dbg(dev, "suspend=%d already_suspended=%d " "mode=%d usbcmd %08x\n", 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) { dev_dbg(dev, "already suspended, leaving early\n"); pdata->already_suspended = 1; return 0; } dev_dbg(dev, "suspending...\n"); ehci->rh_state = EHCI_RH_SUSPENDED; 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]); pdata->pm_usbgenctrl = ehci_readl(ehci, hcd->regs + FSL_SOC_USB_USBGENCTRL); /* clear the W1C bits */ pdata->pm_portsc &= cpu_to_hc32(ehci, ~PORT_RWC_BITS); pdata->suspended = 1; /* 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; } static int ehci_fsl_mpc512x_drv_resume(struct device *dev) { struct usb_hcd *hcd = dev_get_drvdata(dev); struct ehci_hcd *ehci = hcd_to_ehci(hcd); struct fsl_usb2_platform_data *pdata = dev->platform_data; u32 tmp; dev_dbg(dev, "suspend=%d already_suspended=%d\n", pdata->suspended, pdata->already_suspended); /* * If the controller was already suspended at suspend time, * then don't resume it now. */ if (pdata->already_suspended) { dev_dbg(dev, "already suspended, leaving early\n"); pdata->already_suspended = 0; return 0; } if (!pdata->suspended) { dev_dbg(dev, "not suspended, leaving early\n"); return 0; } pdata->suspended = 0; dev_dbg(dev, "resuming...\n"); /* set host mode */ tmp = USBMODE_CM_HOST | (pdata->es ? USBMODE_ES : 0); ehci_writel(ehci, tmp, hcd->regs + FSL_SOC_USB_USBMODE); ehci_writel(ehci, pdata->pm_usbgenctrl, hcd->regs + FSL_SOC_USB_USBGENCTRL); ehci_writel(ehci, ISIPHYCTRL_PXE | ISIPHYCTRL_PHYE, hcd->regs + FSL_SOC_USB_ISIPHYCTRL); /* 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); ehci->rh_state = EHCI_RH_RUNNING; 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); return 0; } #else static inline int ehci_fsl_mpc512x_drv_suspend(struct device *dev) { return 0; } static inline int ehci_fsl_mpc512x_drv_resume(struct device *dev) { return 0; } #endif /* CONFIG_PPC_MPC512x */ static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd) { struct ehci_hcd *ehci = hcd_to_ehci(hcd); return container_of(ehci, struct ehci_fsl, ehci); } static int ehci_fsl_drv_suspend(struct device *dev) { struct usb_hcd *hcd = dev_get_drvdata(dev); struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd); void __iomem *non_ehci = hcd->regs; if (of_device_is_compatible(dev->parent->of_node, "fsl,mpc5121-usb2-dr")) { return ehci_fsl_mpc512x_drv_suspend(dev); } ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd), device_may_wakeup(dev)); if (!fsl_deep_sleep()) return 0; ehci_fsl->usb_ctrl = in_be32(non_ehci + FSL_SOC_USB_CTRL); return 0; } static int ehci_fsl_drv_resume(struct device *dev) { struct usb_hcd *hcd = dev_get_drvdata(dev); struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd); struct ehci_hcd *ehci = hcd_to_ehci(hcd); void __iomem *non_ehci = hcd->regs; if (of_device_is_compatible(dev->parent->of_node, "fsl,mpc5121-usb2-dr")) { return ehci_fsl_mpc512x_drv_resume(dev); } ehci_prepare_ports_for_controller_resume(ehci); if (!fsl_deep_sleep()) return 0; usb_root_hub_lost_power(hcd->self.root_hub); /* Restore USB PHY settings and enable the controller. */ out_be32(non_ehci + FSL_SOC_USB_CTRL, ehci_fsl->usb_ctrl); ehci_reset(ehci); ehci_fsl_reinit(ehci); return 0; } static int ehci_fsl_drv_restore(struct device *dev) { struct usb_hcd *hcd = dev_get_drvdata(dev); usb_root_hub_lost_power(hcd->self.root_hub); return 0; } static struct dev_pm_ops ehci_fsl_pm_ops = { .suspend = ehci_fsl_drv_suspend, .resume = ehci_fsl_drv_resume, .restore = ehci_fsl_drv_restore, }; #define EHCI_FSL_PM_OPS (&ehci_fsl_pm_ops) #else #define EHCI_FSL_PM_OPS NULL #endif /* CONFIG_PM */ #ifdef CONFIG_USB_OTG static int ehci_start_port_reset(struct usb_hcd *hcd, unsigned port) { struct ehci_hcd *ehci = hcd_to_ehci(hcd); u32 status; if (!port) return -EINVAL; port--; /* start port reset before HNP protocol time out */ status = readl(&ehci->regs->port_status[port]); if (!(status & PORT_CONNECT)) return -ENODEV; /* khubd will finish the reset later */ if (ehci_is_TDI(ehci)) { writel(PORT_RESET | (status & ~(PORT_CSC | PORT_PEC | PORT_OCC)), &ehci->regs->port_status[port]); } else { writel(PORT_RESET, &ehci->regs->port_status[port]); } return 0; } #else #define ehci_start_port_reset NULL #endif /* CONFIG_USB_OTG */ 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_fsl), /* * generic hardware linkage */ .irq = ehci_irq, .flags = HCD_USB2 | HCD_MEMORY, /* * 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, .endpoint_reset = ehci_endpoint_reset, /* * 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, .relinquish_port = ehci_relinquish_port, .port_handed_over = ehci_port_handed_over, .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, }; static int ehci_fsl_drv_probe(struct platform_device *pdev) { if (usb_disabled()) return -ENODEV; /* FIXME we only want one one probe() not two */ 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); /* FIXME we only want one one remove() not two */ usb_hcd_fsl_remove(hcd, pdev); return 0; } MODULE_ALIAS("platform:fsl-ehci"); static struct platform_driver ehci_fsl_driver = { .probe = ehci_fsl_drv_probe, .remove = ehci_fsl_drv_remove, .shutdown = usb_hcd_platform_shutdown, .driver = { .name = "fsl-ehci", .pm = EHCI_FSL_PM_OPS, }, };