468 lines
12 KiB
C
468 lines
12 KiB
C
/*
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* Copyright 2005-2009 MontaVista Software, Inc.
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* Copyright 2008 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Ported to 834x by Randy Vinson <rvinson@mvista.com> using code provided
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* by Hunter Wu.
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* Power Management support by Dave Liu <daveliu@freescale.com>,
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* Jerry Huang <Chang-Ming.Huang@freescale.com> and
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* Anton Vorontsov <avorontsov@ru.mvista.com>.
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/delay.h>
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#include <linux/pm.h>
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#include <linux/platform_device.h>
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#include <linux/fsl_devices.h>
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#include "ehci-fsl.h"
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/* configure so an HC device and id are always provided */
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/* always called with process context; sleeping is OK */
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/**
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* usb_hcd_fsl_probe - initialize FSL-based HCDs
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* @drvier: Driver to be used for this HCD
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* @pdev: USB Host Controller being probed
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* Context: !in_interrupt()
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*
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* Allocates basic resources for this USB host controller.
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*
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*/
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static int usb_hcd_fsl_probe(const struct hc_driver *driver,
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struct platform_device *pdev)
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{
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struct fsl_usb2_platform_data *pdata;
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struct usb_hcd *hcd;
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struct resource *res;
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int irq;
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int retval;
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pr_debug("initializing FSL-SOC USB Controller\n");
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/* Need platform data for setup */
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pdata = (struct fsl_usb2_platform_data *)pdev->dev.platform_data;
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if (!pdata) {
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dev_err(&pdev->dev,
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"No platform data for %s.\n", dev_name(&pdev->dev));
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return -ENODEV;
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}
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/*
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* This is a host mode driver, verify that we're supposed to be
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* in host mode.
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*/
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if (!((pdata->operating_mode == FSL_USB2_DR_HOST) ||
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(pdata->operating_mode == FSL_USB2_MPH_HOST) ||
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(pdata->operating_mode == FSL_USB2_DR_OTG))) {
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dev_err(&pdev->dev,
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"Non Host Mode configured for %s. Wrong driver linked.\n",
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dev_name(&pdev->dev));
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return -ENODEV;
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}
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res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
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if (!res) {
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dev_err(&pdev->dev,
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"Found HC with no IRQ. Check %s setup!\n",
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dev_name(&pdev->dev));
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return -ENODEV;
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}
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irq = res->start;
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hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
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if (!hcd) {
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retval = -ENOMEM;
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goto err1;
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}
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res) {
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dev_err(&pdev->dev,
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"Found HC with no register addr. Check %s setup!\n",
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dev_name(&pdev->dev));
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retval = -ENODEV;
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goto err2;
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}
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hcd->rsrc_start = res->start;
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hcd->rsrc_len = res->end - res->start + 1;
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if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
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driver->description)) {
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dev_dbg(&pdev->dev, "controller already in use\n");
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retval = -EBUSY;
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goto err2;
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}
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hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
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if (hcd->regs == NULL) {
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dev_dbg(&pdev->dev, "error mapping memory\n");
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retval = -EFAULT;
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goto err3;
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}
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pdata->regs = hcd->regs;
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/*
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* do platform specific init: check the clock, grab/config pins, etc.
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*/
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if (pdata->init && pdata->init(pdev)) {
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retval = -ENODEV;
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goto err3;
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}
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/* Enable USB controller, 83xx or 8536 */
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if (pdata->have_sysif_regs)
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setbits32(hcd->regs + FSL_SOC_USB_CTRL, 0x4);
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/* Don't need to set host mode here. It will be done by tdi_reset() */
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retval = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
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if (retval != 0)
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goto err4;
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return retval;
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err4:
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iounmap(hcd->regs);
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err3:
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release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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err2:
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usb_put_hcd(hcd);
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err1:
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dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), retval);
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if (pdata->exit)
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pdata->exit(pdev);
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return retval;
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}
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/* may be called without controller electrically present */
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/* may be called with controller, bus, and devices active */
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/**
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* usb_hcd_fsl_remove - shutdown processing for FSL-based HCDs
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* @dev: USB Host Controller being removed
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* Context: !in_interrupt()
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*
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* Reverses the effect of usb_hcd_fsl_probe().
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*
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*/
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static void usb_hcd_fsl_remove(struct usb_hcd *hcd,
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struct platform_device *pdev)
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{
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struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
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usb_remove_hcd(hcd);
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/*
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* do platform specific un-initialization:
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* release iomux pins, disable clock, etc.
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*/
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if (pdata->exit)
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pdata->exit(pdev);
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iounmap(hcd->regs);
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release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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usb_put_hcd(hcd);
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}
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static void ehci_fsl_setup_phy(struct ehci_hcd *ehci,
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enum fsl_usb2_phy_modes phy_mode,
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unsigned int port_offset)
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{
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u32 portsc;
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portsc = ehci_readl(ehci, &ehci->regs->port_status[port_offset]);
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portsc &= ~(PORT_PTS_MSK | PORT_PTS_PTW);
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switch (phy_mode) {
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case FSL_USB2_PHY_ULPI:
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portsc |= PORT_PTS_ULPI;
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break;
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case FSL_USB2_PHY_SERIAL:
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portsc |= PORT_PTS_SERIAL;
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break;
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case FSL_USB2_PHY_UTMI_WIDE:
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portsc |= PORT_PTS_PTW;
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/* fall through */
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case FSL_USB2_PHY_UTMI:
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portsc |= PORT_PTS_UTMI;
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break;
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case FSL_USB2_PHY_NONE:
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break;
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}
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ehci_writel(ehci, portsc, &ehci->regs->port_status[port_offset]);
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}
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static void ehci_fsl_usb_setup(struct ehci_hcd *ehci)
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{
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struct usb_hcd *hcd = ehci_to_hcd(ehci);
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struct fsl_usb2_platform_data *pdata;
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void __iomem *non_ehci = hcd->regs;
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u32 temp;
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pdata = hcd->self.controller->platform_data;
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/* Enable PHY interface in the control reg. */
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if (pdata->have_sysif_regs) {
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temp = in_be32(non_ehci + FSL_SOC_USB_CTRL);
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out_be32(non_ehci + FSL_SOC_USB_CTRL, temp | 0x00000004);
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out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0000001b);
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}
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#if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE)
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/*
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* Turn on cache snooping hardware, since some PowerPC platforms
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* wholly rely on hardware to deal with cache coherent
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*/
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/* Setup Snooping for all the 4GB space */
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/* SNOOP1 starts from 0x0, size 2G */
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out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0 | SNOOP_SIZE_2GB);
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/* SNOOP2 starts from 0x80000000, size 2G */
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out_be32(non_ehci + FSL_SOC_USB_SNOOP2, 0x80000000 | SNOOP_SIZE_2GB);
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#endif
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if ((pdata->operating_mode == FSL_USB2_DR_HOST) ||
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(pdata->operating_mode == FSL_USB2_DR_OTG))
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ehci_fsl_setup_phy(ehci, pdata->phy_mode, 0);
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if (pdata->operating_mode == FSL_USB2_MPH_HOST) {
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unsigned int chip, rev, svr;
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svr = mfspr(SPRN_SVR);
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chip = svr >> 16;
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rev = (svr >> 4) & 0xf;
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/* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */
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if ((rev == 1) && (chip >= 0x8050) && (chip <= 0x8055))
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ehci->has_fsl_port_bug = 1;
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if (pdata->port_enables & FSL_USB2_PORT0_ENABLED)
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ehci_fsl_setup_phy(ehci, pdata->phy_mode, 0);
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if (pdata->port_enables & FSL_USB2_PORT1_ENABLED)
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ehci_fsl_setup_phy(ehci, pdata->phy_mode, 1);
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}
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if (pdata->have_sysif_regs) {
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#ifdef CONFIG_PPC_85xx
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out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x00000008);
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out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000080);
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#else
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out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x0000000c);
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out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000040);
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#endif
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out_be32(non_ehci + FSL_SOC_USB_SICTRL, 0x00000001);
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}
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}
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/* called after powerup, by probe or system-pm "wakeup" */
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static int ehci_fsl_reinit(struct ehci_hcd *ehci)
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{
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ehci_fsl_usb_setup(ehci);
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ehci_port_power(ehci, 0);
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return 0;
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}
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/* called during probe() after chip reset completes */
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static int ehci_fsl_setup(struct usb_hcd *hcd)
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{
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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int retval;
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struct fsl_usb2_platform_data *pdata;
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pdata = hcd->self.controller->platform_data;
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ehci->big_endian_desc = pdata->big_endian_desc;
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ehci->big_endian_mmio = pdata->big_endian_mmio;
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/* EHCI registers start at offset 0x100 */
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ehci->caps = hcd->regs + 0x100;
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ehci->regs = hcd->regs + 0x100 +
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HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
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dbg_hcs_params(ehci, "reset");
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dbg_hcc_params(ehci, "reset");
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/* cache this readonly data; minimize chip reads */
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ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
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hcd->has_tt = 1;
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retval = ehci_halt(ehci);
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if (retval)
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return retval;
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/* data structure init */
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retval = ehci_init(hcd);
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if (retval)
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return retval;
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ehci->sbrn = 0x20;
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ehci_reset(ehci);
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retval = ehci_fsl_reinit(ehci);
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return retval;
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}
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struct ehci_fsl {
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struct ehci_hcd ehci;
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#ifdef CONFIG_PM
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/* Saved USB PHY settings, need to restore after deep sleep. */
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u32 usb_ctrl;
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#endif
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};
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#ifdef CONFIG_PM
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static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd)
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{
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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return container_of(ehci, struct ehci_fsl, ehci);
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}
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static int ehci_fsl_drv_suspend(struct device *dev)
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{
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struct usb_hcd *hcd = dev_get_drvdata(dev);
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struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
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void __iomem *non_ehci = hcd->regs;
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ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd),
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device_may_wakeup(dev));
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if (!fsl_deep_sleep())
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return 0;
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ehci_fsl->usb_ctrl = in_be32(non_ehci + FSL_SOC_USB_CTRL);
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return 0;
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}
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static int ehci_fsl_drv_resume(struct device *dev)
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{
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struct usb_hcd *hcd = dev_get_drvdata(dev);
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struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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void __iomem *non_ehci = hcd->regs;
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ehci_prepare_ports_for_controller_resume(ehci);
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if (!fsl_deep_sleep())
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return 0;
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usb_root_hub_lost_power(hcd->self.root_hub);
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/* Restore USB PHY settings and enable the controller. */
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out_be32(non_ehci + FSL_SOC_USB_CTRL, ehci_fsl->usb_ctrl);
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ehci_reset(ehci);
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ehci_fsl_reinit(ehci);
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return 0;
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}
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static int ehci_fsl_drv_restore(struct device *dev)
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{
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struct usb_hcd *hcd = dev_get_drvdata(dev);
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usb_root_hub_lost_power(hcd->self.root_hub);
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return 0;
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}
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static struct dev_pm_ops ehci_fsl_pm_ops = {
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.suspend = ehci_fsl_drv_suspend,
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.resume = ehci_fsl_drv_resume,
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.restore = ehci_fsl_drv_restore,
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};
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#define EHCI_FSL_PM_OPS (&ehci_fsl_pm_ops)
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#else
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#define EHCI_FSL_PM_OPS NULL
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#endif /* CONFIG_PM */
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static const struct hc_driver ehci_fsl_hc_driver = {
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.description = hcd_name,
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.product_desc = "Freescale On-Chip EHCI Host Controller",
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.hcd_priv_size = sizeof(struct ehci_fsl),
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/*
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* generic hardware linkage
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*/
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.irq = ehci_irq,
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.flags = HCD_USB2 | HCD_MEMORY,
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/*
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* basic lifecycle operations
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*/
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.reset = ehci_fsl_setup,
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.start = ehci_run,
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.stop = ehci_stop,
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.shutdown = ehci_shutdown,
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/*
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* managing i/o requests and associated device resources
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*/
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.urb_enqueue = ehci_urb_enqueue,
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.urb_dequeue = ehci_urb_dequeue,
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.endpoint_disable = ehci_endpoint_disable,
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.endpoint_reset = ehci_endpoint_reset,
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/*
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* scheduling support
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*/
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.get_frame_number = ehci_get_frame,
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/*
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* root hub support
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*/
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.hub_status_data = ehci_hub_status_data,
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.hub_control = ehci_hub_control,
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.bus_suspend = ehci_bus_suspend,
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.bus_resume = ehci_bus_resume,
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.relinquish_port = ehci_relinquish_port,
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.port_handed_over = ehci_port_handed_over,
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.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
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};
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static int ehci_fsl_drv_probe(struct platform_device *pdev)
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{
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if (usb_disabled())
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return -ENODEV;
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/* FIXME we only want one one probe() not two */
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return usb_hcd_fsl_probe(&ehci_fsl_hc_driver, pdev);
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}
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static int ehci_fsl_drv_remove(struct platform_device *pdev)
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{
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struct usb_hcd *hcd = platform_get_drvdata(pdev);
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/* FIXME we only want one one remove() not two */
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usb_hcd_fsl_remove(hcd, pdev);
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return 0;
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}
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MODULE_ALIAS("platform:fsl-ehci");
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static struct platform_driver ehci_fsl_driver = {
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.probe = ehci_fsl_drv_probe,
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.remove = ehci_fsl_drv_remove,
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.shutdown = usb_hcd_platform_shutdown,
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.driver = {
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.name = "fsl-ehci",
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.pm = EHCI_FSL_PM_OPS,
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},
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};
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