mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 10:40:15 +02:00
USB host: Add USB ehci support for nuvoton npcm7xx platform
This patch adds support for ehci controller for the Nuvoton npcm7xx platform. Most of the code was taken from ehci-spear.c + specific initialization code Signed-off-by: Avi Fishman <AviFishman70@gmail.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Avi Fishman
Greg Kroah-Hartman
parent
cae2bc768d
commit
df44831ee2
3 changed files with 221 additions and 0 deletions
|
|
@ -192,6 +192,14 @@ config USB_EHCI_MXC
|
|||
---help---
|
||||
Variation of ARC USB block used in some Freescale chips.
|
||||
|
||||
config USB_EHCI_HCD_NPCM7XX
|
||||
tristate "Support for Nuvoton NPCM7XX on-chip EHCI USB controller"
|
||||
depends on (USB_EHCI_HCD && ARCH_NPCM7XX) || COMPILE_TEST
|
||||
default y if (USB_EHCI_HCD && ARCH_NPCM7XX)
|
||||
help
|
||||
Enables support for the on-chip EHCI controller on
|
||||
Nuvoton NPCM7XX chips.
|
||||
|
||||
config USB_EHCI_HCD_OMAP
|
||||
tristate "EHCI support for OMAP3 and later chips"
|
||||
depends on ARCH_OMAP
|
||||
|
|
|
|||
|
|
@ -43,6 +43,7 @@ obj-$(CONFIG_USB_EHCI_HCD) += ehci-hcd.o
|
|||
obj-$(CONFIG_USB_EHCI_PCI) += ehci-pci.o
|
||||
obj-$(CONFIG_USB_EHCI_HCD_PLATFORM) += ehci-platform.o
|
||||
obj-$(CONFIG_USB_EHCI_MXC) += ehci-mxc.o
|
||||
obj-$(CONFIG_USB_EHCI_HCD_NPCM7XX) += ehci-npcm7xx.o
|
||||
obj-$(CONFIG_USB_EHCI_HCD_OMAP) += ehci-omap.o
|
||||
obj-$(CONFIG_USB_EHCI_HCD_ORION) += ehci-orion.o
|
||||
obj-$(CONFIG_USB_EHCI_HCD_SPEAR) += ehci-spear.o
|
||||
|
|
|
|||
212
drivers/usb/host/ehci-npcm7xx.c
Normal file
212
drivers/usb/host/ehci-npcm7xx.c
Normal file
|
|
@ -0,0 +1,212 @@
|
|||
// SPDX-License-Identifier: GPL-2.0
|
||||
/*
|
||||
* Nuvoton NPCM7xx driver for EHCI HCD
|
||||
*
|
||||
* Copyright (C) 2018 Nuvoton Technologies,
|
||||
* Avi Fishman <avi.fishman@nuvoton.com> <avifishman70@gmail.com>
|
||||
* Tomer Maimon <tomer.maimon@nuvoton.com> <tmaimon77@gmail.com>
|
||||
*
|
||||
* Based on various ehci-spear.c driver
|
||||
*/
|
||||
|
||||
|
||||
#include <linux/dma-mapping.h>
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/pm.h>
|
||||
#include <linux/usb.h>
|
||||
#include <linux/usb/hcd.h>
|
||||
|
||||
#include "ehci.h"
|
||||
|
||||
#include <linux/regmap.h>
|
||||
#include <linux/mfd/syscon.h>
|
||||
|
||||
#define DRIVER_DESC "EHCI npcm7xx driver"
|
||||
|
||||
static const char hcd_name[] = "npcm7xx-ehci";
|
||||
|
||||
#define USB2PHYCTL_OFFSET 0x144
|
||||
|
||||
#define IPSRST2_OFFSET 0x24
|
||||
#define IPSRST3_OFFSET 0x34
|
||||
|
||||
|
||||
static struct hc_driver __read_mostly ehci_npcm7xx_hc_driver;
|
||||
|
||||
#ifdef CONFIG_PM_SLEEP
|
||||
static int ehci_npcm7xx_drv_suspend(struct device *dev)
|
||||
{
|
||||
struct usb_hcd *hcd = dev_get_drvdata(dev);
|
||||
bool do_wakeup = device_may_wakeup(dev);
|
||||
|
||||
return ehci_suspend(hcd, do_wakeup);
|
||||
}
|
||||
|
||||
static int ehci_npcm7xx_drv_resume(struct device *dev)
|
||||
{
|
||||
struct usb_hcd *hcd = dev_get_drvdata(dev);
|
||||
|
||||
ehci_resume(hcd, false);
|
||||
return 0;
|
||||
}
|
||||
#endif /* CONFIG_PM_SLEEP */
|
||||
|
||||
static SIMPLE_DEV_PM_OPS(ehci_npcm7xx_pm_ops, ehci_npcm7xx_drv_suspend,
|
||||
ehci_npcm7xx_drv_resume);
|
||||
|
||||
static int npcm7xx_ehci_hcd_drv_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct usb_hcd *hcd;
|
||||
struct resource *res;
|
||||
struct regmap *gcr_regmap;
|
||||
struct regmap *rst_regmap;
|
||||
const struct hc_driver *driver = &ehci_npcm7xx_hc_driver;
|
||||
int irq;
|
||||
int retval;
|
||||
|
||||
dev_dbg(&pdev->dev, "initializing npcm7xx ehci USB Controller\n");
|
||||
|
||||
gcr_regmap = syscon_regmap_lookup_by_compatible("nuvoton,npcm750-gcr");
|
||||
if (IS_ERR(gcr_regmap)) {
|
||||
dev_err(&pdev->dev, "%s: failed to find nuvoton,npcm750-gcr\n",
|
||||
__func__);
|
||||
return IS_ERR(gcr_regmap);
|
||||
}
|
||||
|
||||
rst_regmap = syscon_regmap_lookup_by_compatible("nuvoton,npcm750-rst");
|
||||
if (IS_ERR(rst_regmap)) {
|
||||
dev_err(&pdev->dev, "%s: failed to find nuvoton,npcm750-rst\n",
|
||||
__func__);
|
||||
return IS_ERR(rst_regmap);
|
||||
}
|
||||
|
||||
/********* phy init ******/
|
||||
// reset usb host
|
||||
regmap_update_bits(rst_regmap, IPSRST2_OFFSET,
|
||||
(0x1 << 26), (0x1 << 26));
|
||||
regmap_update_bits(rst_regmap, IPSRST3_OFFSET,
|
||||
(0x1 << 25), (0x1 << 25));
|
||||
regmap_update_bits(gcr_regmap, USB2PHYCTL_OFFSET,
|
||||
(0x1 << 28), 0);
|
||||
|
||||
udelay(1);
|
||||
|
||||
// enable phy
|
||||
regmap_update_bits(rst_regmap, IPSRST3_OFFSET,
|
||||
(0x1 << 25), 0);
|
||||
|
||||
udelay(50); // enable phy
|
||||
|
||||
regmap_update_bits(gcr_regmap, USB2PHYCTL_OFFSET,
|
||||
(0x1 << 28), (0x1 << 28));
|
||||
|
||||
// enable host
|
||||
regmap_update_bits(rst_regmap, IPSRST2_OFFSET,
|
||||
(0x1 << 26), 0);
|
||||
|
||||
if (usb_disabled())
|
||||
return -ENODEV;
|
||||
|
||||
irq = platform_get_irq(pdev, 0);
|
||||
if (irq < 0) {
|
||||
retval = irq;
|
||||
goto fail;
|
||||
}
|
||||
|
||||
/*
|
||||
* Right now device-tree probed devices don't get dma_mask set.
|
||||
* Since shared usb code relies on it, set it here for now.
|
||||
* Once we have dma capability bindings this can go away.
|
||||
*/
|
||||
retval = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
|
||||
if (retval)
|
||||
goto fail;
|
||||
|
||||
hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
|
||||
if (!hcd) {
|
||||
retval = -ENOMEM;
|
||||
goto fail;
|
||||
}
|
||||
|
||||
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
hcd->regs = devm_ioremap_resource(&pdev->dev, res);
|
||||
if (IS_ERR(hcd->regs)) {
|
||||
retval = PTR_ERR(hcd->regs);
|
||||
goto err_put_hcd;
|
||||
}
|
||||
hcd->rsrc_start = res->start;
|
||||
hcd->rsrc_len = resource_size(res);
|
||||
|
||||
/* registers start at offset 0x0 */
|
||||
hcd_to_ehci(hcd)->caps = hcd->regs;
|
||||
|
||||
retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
|
||||
if (retval)
|
||||
goto err_put_hcd;
|
||||
|
||||
device_wakeup_enable(hcd->self.controller);
|
||||
return retval;
|
||||
|
||||
err_put_hcd:
|
||||
usb_put_hcd(hcd);
|
||||
fail:
|
||||
dev_err(&pdev->dev, "init fail, %d\n", retval);
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
static int npcm7xx_ehci_hcd_drv_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct usb_hcd *hcd = platform_get_drvdata(pdev);
|
||||
|
||||
usb_remove_hcd(hcd);
|
||||
|
||||
usb_put_hcd(hcd);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct of_device_id npcm7xx_ehci_id_table[] = {
|
||||
{ .compatible = "nuvoton,npcm750-ehci" },
|
||||
{ },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, npcm7xx_ehci_id_table);
|
||||
|
||||
static struct platform_driver npcm7xx_ehci_hcd_driver = {
|
||||
.probe = npcm7xx_ehci_hcd_drv_probe,
|
||||
.remove = npcm7xx_ehci_hcd_drv_remove,
|
||||
.shutdown = usb_hcd_platform_shutdown,
|
||||
.driver = {
|
||||
.name = "npcm7xx-ehci",
|
||||
.bus = &platform_bus_type,
|
||||
.pm = &ehci_npcm7xx_pm_ops,
|
||||
.of_match_table = npcm7xx_ehci_id_table,
|
||||
}
|
||||
};
|
||||
|
||||
static int __init ehci_npcm7xx_init(void)
|
||||
{
|
||||
if (usb_disabled())
|
||||
return -ENODEV;
|
||||
|
||||
pr_info("%s: " DRIVER_DESC "\n", hcd_name);
|
||||
|
||||
ehci_init_driver(&ehci_npcm7xx_hc_driver, NULL);
|
||||
return platform_driver_register(&npcm7xx_ehci_hcd_driver);
|
||||
}
|
||||
module_init(ehci_npcm7xx_init);
|
||||
|
||||
static void __exit ehci_npcm7xx_cleanup(void)
|
||||
{
|
||||
platform_driver_unregister(&npcm7xx_ehci_hcd_driver);
|
||||
}
|
||||
module_exit(ehci_npcm7xx_cleanup);
|
||||
|
||||
MODULE_DESCRIPTION(DRIVER_DESC);
|
||||
MODULE_ALIAS("platform:npcm7xx-ehci");
|
||||
MODULE_AUTHOR("Avi Fishman");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
Loading…
Reference in a new issue