189 lines
4.0 KiB
C
189 lines
4.0 KiB
C
/*
|
|
* EHCI HCD glue for Cavium Octeon II SOCs.
|
|
*
|
|
* Loosely based on ehci-au1xxx.c
|
|
*
|
|
* 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.
|
|
*
|
|
* Copyright (C) 2010 Cavium Networks
|
|
*
|
|
*/
|
|
|
|
#include <linux/platform_device.h>
|
|
|
|
#include <asm/octeon/octeon.h>
|
|
#include <asm/octeon/cvmx-uctlx-defs.h>
|
|
|
|
#define OCTEON_EHCI_HCD_NAME "octeon-ehci"
|
|
|
|
/* Common clock init code. */
|
|
void octeon2_usb_clocks_start(void);
|
|
void octeon2_usb_clocks_stop(void);
|
|
|
|
static void ehci_octeon_start(void)
|
|
{
|
|
union cvmx_uctlx_ehci_ctl ehci_ctl;
|
|
|
|
octeon2_usb_clocks_start();
|
|
|
|
ehci_ctl.u64 = cvmx_read_csr(CVMX_UCTLX_EHCI_CTL(0));
|
|
/* Use 64-bit addressing. */
|
|
ehci_ctl.s.ehci_64b_addr_en = 1;
|
|
ehci_ctl.s.l2c_addr_msb = 0;
|
|
ehci_ctl.s.l2c_buff_emod = 1; /* Byte swapped. */
|
|
ehci_ctl.s.l2c_desc_emod = 1; /* Byte swapped. */
|
|
cvmx_write_csr(CVMX_UCTLX_EHCI_CTL(0), ehci_ctl.u64);
|
|
}
|
|
|
|
static void ehci_octeon_stop(void)
|
|
{
|
|
octeon2_usb_clocks_stop();
|
|
}
|
|
|
|
static const struct hc_driver ehci_octeon_hc_driver = {
|
|
.description = hcd_name,
|
|
.product_desc = "Octeon EHCI",
|
|
.hcd_priv_size = sizeof(struct ehci_hcd),
|
|
|
|
/*
|
|
* generic hardware linkage
|
|
*/
|
|
.irq = ehci_irq,
|
|
.flags = HCD_MEMORY | HCD_USB2 | HCD_BH,
|
|
|
|
/*
|
|
* basic lifecycle operations
|
|
*/
|
|
.reset = ehci_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 u64 ehci_octeon_dma_mask = DMA_BIT_MASK(64);
|
|
|
|
static int ehci_octeon_drv_probe(struct platform_device *pdev)
|
|
{
|
|
struct usb_hcd *hcd;
|
|
struct ehci_hcd *ehci;
|
|
struct resource *res_mem;
|
|
int irq;
|
|
int ret;
|
|
|
|
if (usb_disabled())
|
|
return -ENODEV;
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq < 0) {
|
|
dev_err(&pdev->dev, "No irq assigned\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (res_mem == NULL) {
|
|
dev_err(&pdev->dev, "No register space assigned\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
/*
|
|
* We can DMA from anywhere. But the descriptors must be in
|
|
* the lower 4GB.
|
|
*/
|
|
pdev->dev.dma_mask = &ehci_octeon_dma_mask;
|
|
ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
|
|
if (ret)
|
|
return ret;
|
|
|
|
hcd = usb_create_hcd(&ehci_octeon_hc_driver, &pdev->dev, "octeon");
|
|
if (!hcd)
|
|
return -ENOMEM;
|
|
|
|
hcd->rsrc_start = res_mem->start;
|
|
hcd->rsrc_len = resource_size(res_mem);
|
|
|
|
hcd->regs = devm_ioremap_resource(&pdev->dev, res_mem);
|
|
if (IS_ERR(hcd->regs)) {
|
|
ret = PTR_ERR(hcd->regs);
|
|
goto err1;
|
|
}
|
|
|
|
ehci_octeon_start();
|
|
|
|
ehci = hcd_to_ehci(hcd);
|
|
|
|
/* Octeon EHCI matches CPU endianness. */
|
|
#ifdef __BIG_ENDIAN
|
|
ehci->big_endian_mmio = 1;
|
|
#endif
|
|
|
|
ehci->caps = hcd->regs;
|
|
|
|
ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
|
|
if (ret) {
|
|
dev_dbg(&pdev->dev, "failed to add hcd with err %d\n", ret);
|
|
goto err2;
|
|
}
|
|
device_wakeup_enable(hcd->self.controller);
|
|
|
|
platform_set_drvdata(pdev, hcd);
|
|
|
|
return 0;
|
|
err2:
|
|
ehci_octeon_stop();
|
|
|
|
err1:
|
|
usb_put_hcd(hcd);
|
|
return ret;
|
|
}
|
|
|
|
static int ehci_octeon_drv_remove(struct platform_device *pdev)
|
|
{
|
|
struct usb_hcd *hcd = platform_get_drvdata(pdev);
|
|
|
|
usb_remove_hcd(hcd);
|
|
|
|
ehci_octeon_stop();
|
|
usb_put_hcd(hcd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver ehci_octeon_driver = {
|
|
.probe = ehci_octeon_drv_probe,
|
|
.remove = ehci_octeon_drv_remove,
|
|
.shutdown = usb_hcd_platform_shutdown,
|
|
.driver = {
|
|
.name = OCTEON_EHCI_HCD_NAME,
|
|
.owner = THIS_MODULE,
|
|
}
|
|
};
|
|
|
|
MODULE_ALIAS("platform:" OCTEON_EHCI_HCD_NAME);
|