| /* |
| * 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 "ehci-fsl.h" |
| |
| /* FIXME: Power Management is un-ported so temporarily disable it */ |
| #undef CONFIG_PM |
| |
| |
| /* 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; |
| unsigned int temp; |
| |
| 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 = res->end - res->start + 1; |
| 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; |
| } |
| |
| /* Enable USB controller */ |
| temp = in_be32(hcd->regs + 0x500); |
| out_be32(hcd->regs + 0x500, temp | 0x4); |
| |
| /* Set to Host mode */ |
| temp = in_le32(hcd->regs + 0x1a8); |
| out_le32(hcd->regs + 0x1a8, temp | 0x3); |
| |
| retval = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED); |
| if (retval != 0) |
| goto err4; |
| 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); |
| 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) |
| { |
| usb_remove_hcd(hcd); |
| iounmap(hcd->regs); |
| release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| usb_put_hcd(hcd); |
| } |
| |
| static void mpc83xx_setup_phy(struct ehci_hcd *ehci, |
| enum fsl_usb2_phy_modes phy_mode, |
| unsigned int port_offset) |
| { |
| u32 portsc = 0; |
| 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 mpc83xx_usb_setup(struct usb_hcd *hcd) |
| { |
| struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
| struct fsl_usb2_platform_data *pdata; |
| void __iomem *non_ehci = hcd->regs; |
| u32 temp; |
| |
| pdata = |
| (struct fsl_usb2_platform_data *)hcd->self.controller-> |
| platform_data; |
| /* Enable PHY interface in the control reg. */ |
| 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)) |
| mpc83xx_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) |
| mpc83xx_setup_phy(ehci, pdata->phy_mode, 0); |
| if (pdata->port_enables & FSL_USB2_PORT1_ENABLED) |
| mpc83xx_setup_phy(ehci, pdata->phy_mode, 1); |
| } |
| |
| /* put controller in host mode. */ |
| ehci_writel(ehci, 0x00000003, non_ehci + FSL_SOC_USB_USBMODE); |
| #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) |
| { |
| mpc83xx_usb_setup(ehci_to_hcd(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; |
| |
| /* 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); |
| if (retval) |
| return retval; |
| |
| /* 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 = HCD_USB2, |
| |
| /* |
| * 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, |
| .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", |
| }, |
| }; |