mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 06:46:59 +07:00
135db0485c
Various minor fixes to some SOC bus glue for EHCI:
- Remove a bogus copyright (by "me"!) which someone added to the FSL
driver, and an irrelevant comment.
- Un-break MODULE_ALIAS() directives after platform_bus hotplugging
acquired a backwards-incompatible change. (Which didn't fix ANY
of the in-tree drivers it prevented from hotplugging -- sigh.)
- Remove some bogus assignments of platform_bus_type; that's done by
the platform_bus code.
- Add some FIXMEs for drivers with that pointless two-level idiom for
probe() and remove() routines. ("Obfuscation" is a non-goal.)
That should help avoid future bus glue which copies that idiom.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
281 lines
7.4 KiB
C
281 lines
7.4 KiB
C
/*
|
|
* EHCI HCD (Host Controller Driver) for USB.
|
|
*
|
|
* Bus Glue for AMD Alchemy Au1xxx
|
|
*
|
|
* Based on "ohci-au1xxx.c" by Matt Porter <mporter@kernel.crashing.org>
|
|
*
|
|
* Modified for AMD Alchemy Au1200 EHC
|
|
* by K.Boge <karsten.boge@amd.com>
|
|
*
|
|
* This file is licenced under the GPL.
|
|
*/
|
|
|
|
#include <linux/platform_device.h>
|
|
#include <asm/mach-au1x00/au1000.h>
|
|
|
|
#define USB_HOST_CONFIG (USB_MSR_BASE + USB_MSR_MCFG)
|
|
#define USB_MCFG_PFEN (1<<31)
|
|
#define USB_MCFG_RDCOMB (1<<30)
|
|
#define USB_MCFG_SSDEN (1<<23)
|
|
#define USB_MCFG_PHYPLLEN (1<<19)
|
|
#define USB_MCFG_EHCCLKEN (1<<17)
|
|
#define USB_MCFG_UCAM (1<<7)
|
|
#define USB_MCFG_EBMEN (1<<3)
|
|
#define USB_MCFG_EMEMEN (1<<2)
|
|
|
|
#define USBH_ENABLE_CE (USB_MCFG_PHYPLLEN | USB_MCFG_EHCCLKEN)
|
|
|
|
#ifdef CONFIG_DMA_COHERENT
|
|
#define USBH_ENABLE_INIT (USBH_ENABLE_CE \
|
|
| USB_MCFG_PFEN | USB_MCFG_RDCOMB \
|
|
| USB_MCFG_SSDEN | USB_MCFG_UCAM \
|
|
| USB_MCFG_EBMEN | USB_MCFG_EMEMEN)
|
|
#else
|
|
#define USBH_ENABLE_INIT (USBH_ENABLE_CE \
|
|
| USB_MCFG_PFEN | USB_MCFG_RDCOMB \
|
|
| USB_MCFG_SSDEN \
|
|
| USB_MCFG_EBMEN | USB_MCFG_EMEMEN)
|
|
#endif
|
|
#define USBH_DISABLE (USB_MCFG_EBMEN | USB_MCFG_EMEMEN)
|
|
|
|
extern int usb_disabled(void);
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static void au1xxx_start_ehc(struct platform_device *dev)
|
|
{
|
|
pr_debug(__FILE__ ": starting Au1xxx EHCI USB Controller\n");
|
|
|
|
/* write HW defaults again in case Yamon cleared them */
|
|
if (au_readl(USB_HOST_CONFIG) == 0) {
|
|
au_writel(0x00d02000, USB_HOST_CONFIG);
|
|
au_readl(USB_HOST_CONFIG);
|
|
udelay(1000);
|
|
}
|
|
/* enable host controller */
|
|
au_writel(USBH_ENABLE_CE | au_readl(USB_HOST_CONFIG), USB_HOST_CONFIG);
|
|
au_readl(USB_HOST_CONFIG);
|
|
udelay(1000);
|
|
au_writel(USBH_ENABLE_INIT | au_readl(USB_HOST_CONFIG),
|
|
USB_HOST_CONFIG);
|
|
au_readl(USB_HOST_CONFIG);
|
|
udelay(1000);
|
|
|
|
pr_debug(__FILE__ ": Clock to USB host has been enabled\n");
|
|
}
|
|
|
|
static void au1xxx_stop_ehc(struct platform_device *dev)
|
|
{
|
|
pr_debug(__FILE__ ": stopping Au1xxx EHCI USB Controller\n");
|
|
|
|
/* Disable mem */
|
|
au_writel(~USBH_DISABLE & au_readl(USB_HOST_CONFIG), USB_HOST_CONFIG);
|
|
udelay(1000);
|
|
/* Disable clock */
|
|
au_writel(~USB_MCFG_EHCCLKEN & au_readl(USB_HOST_CONFIG),
|
|
USB_HOST_CONFIG);
|
|
au_readl(USB_HOST_CONFIG);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* configure so an HC device and id are always provided */
|
|
/* always called with process context; sleeping is OK */
|
|
|
|
/**
|
|
* usb_ehci_au1xxx_probe - initialize Au1xxx-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_ehci_au1xxx_probe(const struct hc_driver *driver,
|
|
struct usb_hcd **hcd_out, struct platform_device *dev)
|
|
{
|
|
int retval;
|
|
struct usb_hcd *hcd;
|
|
struct ehci_hcd *ehci;
|
|
|
|
#if defined(CONFIG_SOC_AU1200) && defined(CONFIG_DMA_COHERENT)
|
|
|
|
/* Au1200 AB USB does not support coherent memory */
|
|
if (!(read_c0_prid() & 0xff)) {
|
|
pr_info("%s: this is chip revision AB!\n", dev->name);
|
|
pr_info("%s: update your board or re-configure the kernel\n",
|
|
dev->name);
|
|
return -ENODEV;
|
|
}
|
|
#endif
|
|
|
|
au1xxx_start_ehc(dev);
|
|
|
|
if (dev->resource[1].flags != IORESOURCE_IRQ) {
|
|
pr_debug("resource[1] is not IORESOURCE_IRQ");
|
|
retval = -ENOMEM;
|
|
}
|
|
hcd = usb_create_hcd(driver, &dev->dev, "Au1xxx");
|
|
if (!hcd)
|
|
return -ENOMEM;
|
|
hcd->rsrc_start = dev->resource[0].start;
|
|
hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1;
|
|
|
|
if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
|
|
pr_debug("request_mem_region failed");
|
|
retval = -EBUSY;
|
|
goto err1;
|
|
}
|
|
|
|
hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
|
|
if (!hcd->regs) {
|
|
pr_debug("ioremap failed");
|
|
retval = -ENOMEM;
|
|
goto err2;
|
|
}
|
|
|
|
ehci = hcd_to_ehci(hcd);
|
|
ehci->caps = hcd->regs;
|
|
ehci->regs = hcd->regs + HC_LENGTH(readl(&ehci->caps->hc_capbase));
|
|
/* cache this readonly data; minimize chip reads */
|
|
ehci->hcs_params = readl(&ehci->caps->hcs_params);
|
|
|
|
/* ehci_hcd_init(hcd_to_ehci(hcd)); */
|
|
|
|
retval =
|
|
usb_add_hcd(hcd, dev->resource[1].start, IRQF_DISABLED | IRQF_SHARED);
|
|
if (retval == 0)
|
|
return retval;
|
|
|
|
au1xxx_stop_ehc(dev);
|
|
iounmap(hcd->regs);
|
|
err2:
|
|
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
|
|
err1:
|
|
usb_put_hcd(hcd);
|
|
return retval;
|
|
}
|
|
|
|
/* may be called without controller electrically present */
|
|
/* may be called with controller, bus, and devices active */
|
|
|
|
/**
|
|
* usb_ehci_hcd_au1xxx_remove - shutdown processing for Au1xxx-based HCDs
|
|
* @dev: USB Host Controller being removed
|
|
* Context: !in_interrupt()
|
|
*
|
|
* Reverses the effect of usb_ehci_hcd_au1xxx_probe(), first invoking
|
|
* the HCD's stop() method. It is always called from a thread
|
|
* context, normally "rmmod", "apmd", or something similar.
|
|
*
|
|
*/
|
|
void usb_ehci_au1xxx_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);
|
|
au1xxx_stop_ehc(dev);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static const struct hc_driver ehci_au1xxx_hc_driver = {
|
|
.description = hcd_name,
|
|
.product_desc = "Au1xxx EHCI",
|
|
.hcd_priv_size = sizeof(struct ehci_hcd),
|
|
|
|
/*
|
|
* generic hardware linkage
|
|
*/
|
|
.irq = ehci_irq,
|
|
.flags = HCD_MEMORY | HCD_USB2,
|
|
|
|
/*
|
|
* basic lifecycle operations
|
|
*
|
|
* FIXME -- ehci_init() doesn't do enough here.
|
|
* See ehci-ppc-soc for a complete implementation.
|
|
*/
|
|
.reset = ehci_init,
|
|
.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,
|
|
.relinquish_port = ehci_relinquish_port,
|
|
};
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static int ehci_hcd_au1xxx_drv_probe(struct platform_device *pdev)
|
|
{
|
|
struct usb_hcd *hcd = NULL;
|
|
int ret;
|
|
|
|
pr_debug("In ehci_hcd_au1xxx_drv_probe\n");
|
|
|
|
if (usb_disabled())
|
|
return -ENODEV;
|
|
|
|
/* FIXME we only want one one probe() not two */
|
|
ret = usb_ehci_au1xxx_probe(&ehci_au1xxx_hc_driver, &hcd, pdev);
|
|
return ret;
|
|
}
|
|
|
|
static int ehci_hcd_au1xxx_drv_remove(struct platform_device *pdev)
|
|
{
|
|
struct usb_hcd *hcd = platform_get_drvdata(pdev);
|
|
|
|
/* FIXME we only want one one remove() not two */
|
|
usb_ehci_au1xxx_remove(hcd, pdev);
|
|
return 0;
|
|
}
|
|
|
|
/*TBD*/
|
|
/*static int ehci_hcd_au1xxx_drv_suspend(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct usb_hcd *hcd = dev_get_drvdata(dev);
|
|
|
|
return 0;
|
|
}
|
|
static int ehci_hcd_au1xxx_drv_resume(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct usb_hcd *hcd = dev_get_drvdata(dev);
|
|
|
|
return 0;
|
|
}
|
|
*/
|
|
MODULE_ALIAS("platform:au1xxx-ehci");
|
|
static struct platform_driver ehci_hcd_au1xxx_driver = {
|
|
.probe = ehci_hcd_au1xxx_drv_probe,
|
|
.remove = ehci_hcd_au1xxx_drv_remove,
|
|
.shutdown = usb_hcd_platform_shutdown,
|
|
/*.suspend = ehci_hcd_au1xxx_drv_suspend, */
|
|
/*.resume = ehci_hcd_au1xxx_drv_resume, */
|
|
.driver = {
|
|
.name = "au1xxx-ehci",
|
|
}
|
|
};
|