+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * PMC MSP EHCI (Host Controller Driver) for USB.
- *
- * (C) Copyright 2006-2010 PMC-Sierra Inc
- */
-
-/* includes */
-#include <linux/platform_device.h>
-#include <linux/gpio.h>
-#include <linux/usb.h>
-#include <msp_usb.h>
-
-/* stream disable*/
-#define USB_CTRL_MODE_STREAM_DISABLE 0x10
-
-/* threshold */
-#define USB_CTRL_FIFO_THRESH 0x00300000
-
-/* register offset for usb_mode */
-#define USB_EHCI_REG_USB_MODE 0x68
-
-/* register offset for usb fifo */
-#define USB_EHCI_REG_USB_FIFO 0x24
-
-/* register offset for usb status */
-#define USB_EHCI_REG_USB_STATUS 0x44
-
-/* serial/parallel transceiver */
-#define USB_EHCI_REG_BIT_STAT_STS (1<<29)
-
-/* TWI USB0 host device pin */
-#define MSP_PIN_USB0_HOST_DEV 49
-
-/* TWI USB1 host device pin */
-#define MSP_PIN_USB1_HOST_DEV 50
-
-
-static void usb_hcd_tdi_set_mode(struct ehci_hcd *ehci)
-{
- u8 *base;
- u8 *statreg;
- u8 *fiforeg;
- u32 val;
- struct ehci_regs *reg_base = ehci->regs;
-
- /* get register base */
- base = (u8 *)reg_base + USB_EHCI_REG_USB_MODE;
- statreg = (u8 *)reg_base + USB_EHCI_REG_USB_STATUS;
- fiforeg = (u8 *)reg_base + USB_EHCI_REG_USB_FIFO;
-
- /* Disable controller mode stream */
- val = ehci_readl(ehci, (u32 *)base);
- ehci_writel(ehci, (val | USB_CTRL_MODE_STREAM_DISABLE),
- (u32 *)base);
-
- /* clear STS to select parallel transceiver interface */
- val = ehci_readl(ehci, (u32 *)statreg);
- val = val & ~USB_EHCI_REG_BIT_STAT_STS;
- ehci_writel(ehci, val, (u32 *)statreg);
-
- /* write to set the proper fifo threshold */
- ehci_writel(ehci, USB_CTRL_FIFO_THRESH, (u32 *)fiforeg);
-
- /* set TWI GPIO USB_HOST_DEV pin high */
- gpio_direction_output(MSP_PIN_USB0_HOST_DEV, 1);
-}
-
-/* called during probe() after chip reset completes */
-static int ehci_msp_setup(struct usb_hcd *hcd)
-{
- struct ehci_hcd *ehci = hcd_to_ehci(hcd);
- int retval;
-
- ehci->big_endian_mmio = 1;
- ehci->big_endian_desc = 1;
-
- ehci->caps = hcd->regs;
- hcd->has_tt = 1;
-
- retval = ehci_setup(hcd);
- if (retval)
- return retval;
-
- usb_hcd_tdi_set_mode(ehci);
-
- return retval;
-}
-
-
-/* configure so an HC device and id are always provided
- * always called with process context; sleeping is OK
- */
-
-static int usb_hcd_msp_map_regs(struct mspusb_device *dev)
-{
- struct resource *res;
- struct platform_device *pdev = &dev->dev;
- u32 res_len;
- int retval;
-
- /* MAB register space */
- res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- if (res == NULL)
- return -ENOMEM;
- res_len = resource_size(res);
- if (!request_mem_region(res->start, res_len, "mab regs"))
- return -EBUSY;
-
- dev->mab_regs = ioremap(res->start, res_len);
- if (dev->mab_regs == NULL) {
- retval = -ENOMEM;
- goto err1;
- }
-
- /* MSP USB register space */
- res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
- if (res == NULL) {
- retval = -ENOMEM;
- goto err2;
- }
- res_len = resource_size(res);
- if (!request_mem_region(res->start, res_len, "usbid regs")) {
- retval = -EBUSY;
- goto err2;
- }
- dev->usbid_regs = ioremap(res->start, res_len);
- if (dev->usbid_regs == NULL) {
- retval = -ENOMEM;
- goto err3;
- }
-
- return 0;
-err3:
- res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
- res_len = resource_size(res);
- release_mem_region(res->start, res_len);
-err2:
- iounmap(dev->mab_regs);
-err1:
- res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- res_len = resource_size(res);
- release_mem_region(res->start, res_len);
- dev_err(&pdev->dev, "Failed to map non-EHCI regs.\n");
- return retval;
-}
-
-/**
- * usb_hcd_msp_probe - initialize PMC MSP-based HCDs
- * @driver: Pointer to hc driver instance
- * @dev: USB controller to probe
- *
- * Context: task context, might sleep
- *
- * Allocates basic resources for this USB host controller, and
- * then invokes the start() method for the HCD associated with it
- * through the hotplug entry's driver_data.
- */
-int usb_hcd_msp_probe(const struct hc_driver *driver,
- struct platform_device *dev)
-{
- int retval;
- struct usb_hcd *hcd;
- struct resource *res;
- struct ehci_hcd *ehci ;
-
- hcd = usb_create_hcd(driver, &dev->dev, "pmcmsp");
- if (!hcd)
- return -ENOMEM;
-
- res = platform_get_resource(dev, IORESOURCE_MEM, 0);
- if (res == NULL) {
- pr_debug("No IOMEM resource info for %s.\n", dev->name);
- retval = -ENOMEM;
- goto err1;
- }
- hcd->rsrc_start = res->start;
- hcd->rsrc_len = resource_size(res);
- if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, dev->name)) {
- retval = -EBUSY;
- goto err1;
- }
- hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
- if (!hcd->regs) {
- pr_debug("ioremap failed");
- retval = -ENOMEM;
- goto err2;
- }
-
- res = platform_get_resource(dev, IORESOURCE_IRQ, 0);
- if (res == NULL) {
- dev_err(&dev->dev, "No IRQ resource info for %s.\n", dev->name);
- retval = -ENOMEM;
- goto err3;
- }
-
- /* Map non-EHCI register spaces */
- retval = usb_hcd_msp_map_regs(to_mspusb_device(dev));
- if (retval != 0)
- goto err3;
-
- ehci = hcd_to_ehci(hcd);
- ehci->big_endian_mmio = 1;
- ehci->big_endian_desc = 1;
-
-
- retval = usb_add_hcd(hcd, res->start, IRQF_SHARED);
- if (retval == 0) {
- device_wakeup_enable(hcd->self.controller);
- return 0;
- }
-
- usb_remove_hcd(hcd);
-err3:
- iounmap(hcd->regs);
-err2:
- release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
-err1:
- usb_put_hcd(hcd);
-
- return retval;
-}
-
-
-
-/**
- * usb_hcd_msp_remove - shutdown processing for PMC MSP-based HCDs
- * @hcd: USB Host Controller being removed
- *
- * Context: task context, might sleep
- *
- * Reverses the effect of usb_hcd_msp_probe(), first invoking
- * the HCD's stop() method. It is always called from a thread
- * context, normally "rmmod", "apmd", or something similar.
- *
- * may be called without controller electrically present
- * may be called with controller, bus, and devices active
- */
-static void usb_hcd_msp_remove(struct usb_hcd *hcd)
-{
- usb_remove_hcd(hcd);
- iounmap(hcd->regs);
- release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
- usb_put_hcd(hcd);
-}
-
-static const struct hc_driver ehci_msp_hc_driver = {
- .description = hcd_name,
- .product_desc = "PMC MSP EHCI",
- .hcd_priv_size = sizeof(struct ehci_hcd),
-
- /*
- * generic hardware linkage
- */
- .irq = ehci_irq,
- .flags = HCD_MEMORY | HCD_DMA | HCD_USB2 | HCD_BH,
-
- /*
- * basic lifecycle operations
- */
- .reset = ehci_msp_setup,
- .shutdown = ehci_shutdown,
- .start = ehci_run,
- .stop = ehci_stop,
-
- /*
- * 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_hcd_msp_drv_probe(struct platform_device *pdev)
-{
- int ret;
-
- pr_debug("In ehci_hcd_msp_drv_probe");
-
- if (usb_disabled())
- return -ENODEV;
-
- gpio_request(MSP_PIN_USB0_HOST_DEV, "USB0_HOST_DEV_GPIO");
-
- ret = usb_hcd_msp_probe(&ehci_msp_hc_driver, pdev);
-
- return ret;
-}
-
-static int ehci_hcd_msp_drv_remove(struct platform_device *pdev)
-{
- struct usb_hcd *hcd = platform_get_drvdata(pdev);
-
- usb_hcd_msp_remove(hcd);
-
- /* free TWI GPIO USB_HOST_DEV pin */
- gpio_free(MSP_PIN_USB0_HOST_DEV);
-
- return 0;
-}
-
-MODULE_ALIAS("pmcmsp-ehci");
-
-static struct platform_driver ehci_hcd_msp_driver = {
- .probe = ehci_hcd_msp_drv_probe,
- .remove = ehci_hcd_msp_drv_remove,
- .driver = {
- .name = "pmcmsp-ehci",
- },
-};
projects / platform / kernel / linux-rpi.git / commitdiff