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path: root/drivers/usb/host/ehci-arc.c
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Diffstat (limited to 'drivers/usb/host/ehci-arc.c')
-rw-r--r--drivers/usb/host/ehci-arc.c635
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",
+ },
+};
generated by cgit v1.2.3 (git 2.0.4) at 2024-05-23 21:40:54 +0000