USB: EHCI bus glue for on-chip PMC MSP USB controller
This patch add bus glue for USB controller commonly found in PMC-Sierra MSP71xx family of SoC's. Signed-off-by: Anoop P A <anoop.pa@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Anoop
Greg Kroah-Hartman
parent
2edb11cbac
commit
22ced6874f
|
|
@ -91,17 +91,28 @@ config USB_EHCI_TT_NEWSCHED
|
|||
|
||||
If unsure, say Y.
|
||||
|
||||
config USB_EHCI_HCD_PMC_MSP
|
||||
tristate "EHCI support for on-chip PMC MSP71xx USB controller"
|
||||
depends on USB_EHCI_HCD && MSP_HAS_USB
|
||||
default n
|
||||
select USB_EHCI_BIG_ENDIAN_DESC
|
||||
select USB_EHCI_BIG_ENDIAN_MMIO
|
||||
---help---
|
||||
Enables support for the onchip USB controller on the PMC_MSP7100 Family SoC's.
|
||||
If unsure, say N.
|
||||
|
||||
config USB_EHCI_BIG_ENDIAN_MMIO
|
||||
bool
|
||||
depends on USB_EHCI_HCD && (PPC_CELLEB || PPC_PS3 || 440EPX || \
|
||||
ARCH_IXP4XX || XPS_USB_HCD_XILINX || \
|
||||
PPC_MPC512x || CPU_CAVIUM_OCTEON)
|
||||
PPC_MPC512x || CPU_CAVIUM_OCTEON || \
|
||||
PMC_MSP)
|
||||
default y
|
||||
|
||||
config USB_EHCI_BIG_ENDIAN_DESC
|
||||
bool
|
||||
depends on USB_EHCI_HCD && (440EPX || ARCH_IXP4XX || XPS_USB_HCD_XILINX || \
|
||||
PPC_MPC512x)
|
||||
PPC_MPC512x || PMC_MSP)
|
||||
default y
|
||||
|
||||
config XPS_USB_HCD_XILINX
|
||||
|
|
|
|||
|
|
@ -1259,6 +1259,11 @@ MODULE_LICENSE ("GPL");
|
|||
#define PLATFORM_DRIVER ehci_msm_driver
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_USB_EHCI_HCD_PMC_MSP
|
||||
#include "ehci-pmcmsp.c"
|
||||
#define PLATFORM_DRIVER ehci_hcd_msp_driver
|
||||
#endif
|
||||
|
||||
#if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
|
||||
!defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \
|
||||
!defined(XILINX_OF_PLATFORM_DRIVER)
|
||||
|
|
|
|||
|
|
@ -0,0 +1,383 @@
|
|||
/*
|
||||
* PMC MSP EHCI (Host Controller Driver) for USB.
|
||||
*
|
||||
* (C) Copyright 2006-2010 PMC-Sierra Inc
|
||||
*
|
||||
* This file is subject to the terms and conditions of the GNU General Public
|
||||
* License. See the file "COPYING" in the main directory of this archive
|
||||
* for more details.
|
||||
*
|
||||
*/
|
||||
|
||||
/* 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);
|
||||
#ifdef CONFIG_MSP_HAS_DUAL_USB
|
||||
gpio_direction_output(MSP_PIN_USB1_HOST_DEV, 1);
|
||||
#endif
|
||||
}
|
||||
|
||||
/* 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;
|
||||
ehci->regs = hcd->regs +
|
||||
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);
|
||||
hcd->has_tt = 1;
|
||||
|
||||
retval = ehci_halt(ehci);
|
||||
if (retval)
|
||||
return retval;
|
||||
|
||||
ehci_reset(ehci);
|
||||
|
||||
/* data structure init */
|
||||
retval = ehci_init(hcd);
|
||||
if (retval)
|
||||
return retval;
|
||||
|
||||
usb_hcd_tdi_set_mode(ehci);
|
||||
ehci_port_power(ehci, 0);
|
||||
|
||||
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 = res->end - res->start + 1;
|
||||
if (!request_mem_region(res->start, res_len, "mab regs"))
|
||||
return -EBUSY;
|
||||
|
||||
dev->mab_regs = ioremap_nocache(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 = res->end - res->start + 1;
|
||||
if (!request_mem_region(res->start, res_len, "usbid regs")) {
|
||||
retval = -EBUSY;
|
||||
goto err2;
|
||||
}
|
||||
dev->usbid_regs = ioremap_nocache(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 = res->end - res->start + 1;
|
||||
release_mem_region(res->start, res_len);
|
||||
err2:
|
||||
iounmap(dev->mab_regs);
|
||||
err1:
|
||||
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
|
||||
res_len = res->end - res->start + 1;
|
||||
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
|
||||
* Context: !in_interrupt()
|
||||
*
|
||||
* 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 = res->end - res->start + 1;
|
||||
if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, dev->name)) {
|
||||
retval = -EBUSY;
|
||||
goto err1;
|
||||
}
|
||||
hcd->regs = ioremap_nocache(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)
|
||||
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
|
||||
* @dev: USB Host Controller being removed
|
||||
* Context: !in_interrupt()
|
||||
*
|
||||
* 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
|
||||
*/
|
||||
void usb_hcd_msp_remove(struct usb_hcd *hcd, struct platform_device *dev)
|
||||
{
|
||||
usb_remove_hcd(hcd);
|
||||
iounmap(hcd->regs);
|
||||
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
|
||||
usb_put_hcd(hcd);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_MSP_HAS_DUAL_USB
|
||||
/*
|
||||
* Wrapper around the main ehci_irq. Since both USB host controllers are
|
||||
* sharing the same IRQ, need to first determine whether we're the intended
|
||||
* recipient of this interrupt.
|
||||
*/
|
||||
static irqreturn_t ehci_msp_irq(struct usb_hcd *hcd)
|
||||
{
|
||||
u32 int_src;
|
||||
struct device *dev = hcd->self.controller;
|
||||
struct platform_device *pdev;
|
||||
struct mspusb_device *mdev;
|
||||
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
|
||||
/* need to reverse-map a couple of containers to get our device */
|
||||
pdev = to_platform_device(dev);
|
||||
mdev = to_mspusb_device(pdev);
|
||||
|
||||
/* Check to see if this interrupt is for this host controller */
|
||||
int_src = ehci_readl(ehci, &mdev->mab_regs->int_stat);
|
||||
if (int_src & (1 << pdev->id))
|
||||
return ehci_irq(hcd);
|
||||
|
||||
/* Not for this device */
|
||||
return IRQ_NONE;
|
||||
}
|
||||
#endif /* DUAL_USB */
|
||||
|
||||
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
|
||||
*/
|
||||
#ifdef CONFIG_MSP_HAS_DUAL_USB
|
||||
.irq = ehci_msp_irq,
|
||||
#else
|
||||
.irq = ehci_irq,
|
||||
#endif
|
||||
.flags = HCD_MEMORY | HCD_USB2,
|
||||
|
||||
/*
|
||||
* basic lifecycle operations
|
||||
*/
|
||||
.reset = ehci_msp_setup,
|
||||
.start = ehci_run,
|
||||
.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");
|
||||
#ifdef CONFIG_MSP_HAS_DUAL_USB
|
||||
gpio_request(MSP_PIN_USB1_HOST_DEV, "USB1_HOST_DEV_GPIO");
|
||||
#endif
|
||||
|
||||
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, pdev);
|
||||
|
||||
/* free TWI GPIO USB_HOST_DEV pin */
|
||||
gpio_free(MSP_PIN_USB0_HOST_DEV);
|
||||
#ifdef CONFIG_MSP_HAS_DUAL_USB
|
||||
gpio_free(MSP_PIN_USB1_HOST_DEV);
|
||||
#endif
|
||||
|
||||
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",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
};
|
||||
Loading…
Reference in New Issue