Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-23 12:42:02 +00:00
Code Issues Packages Projects Releases Wiki Activity

usb: chipidea: Add support for NPCM

Browse Source 
Add Nuvoton NPCM BMC SoCs support to USB ChipIdea driver.
NPCM SoC includes ChipIdea IP block that is used for USB device controller
mode.

Signed-off-by: Tomer Maimon <tmaimon77@gmail.com>
Acked-by: Peter Chen <peter.chen@kernel.org>
Link: https://lore.kernel.org/r/20231017195903.1665260-4-tmaimon77@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tomer Maimon 2023-10-17 22:59:03 +03:00 committed by Greg Kroah-Hartman
parent ceae398f15
commit 70f13579c2
3 changed files with 119 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/usb/chipidea/Kconfig
View File

@ -43,6 +43,10 @@ config USB_CHIPIDEA_MSM
tristate "Enable MSM hsusb glue driver" if EXPERT
default USB_CHIPIDEA
config USB_CHIPIDEA_NPCM
tristate "Enable NPCM hsusb glue driver" if EXPERT
default USB_CHIPIDEA
config USB_CHIPIDEA_IMX
tristate "Enable i.MX USB glue driver" if EXPERT
depends on OF

1
drivers/usb/chipidea/Makefile
View File

@ -13,6 +13,7 @@ ci_hdrc-$(CONFIG_USB_OTG_FSM) += otg_fsm.o
obj-$(CONFIG_USB_CHIPIDEA_GENERIC) += ci_hdrc_usb2.o
obj-$(CONFIG_USB_CHIPIDEA_MSM) += ci_hdrc_msm.o
obj-$(CONFIG_USB_CHIPIDEA_NPCM) += ci_hdrc_npcm.o
obj-$(CONFIG_USB_CHIPIDEA_PCI) += ci_hdrc_pci.o
obj-$(CONFIG_USB_CHIPIDEA_IMX) += usbmisc_imx.o ci_hdrc_imx.o
obj-$(CONFIG_USB_CHIPIDEA_TEGRA) += ci_hdrc_tegra.o

114
drivers/usb/chipidea/ci_hdrc_npcm.c Normal file
View File

@ -0,0 +1,114 @@
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2023 Nuvoton Technology corporation.
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/usb/chipidea.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/reset-controller.h>
#include <linux/of.h>
#include "ci.h"
struct npcm_udc_data {
struct platform_device *ci;
struct clk *core_clk;
struct ci_hdrc_platform_data pdata;
};
static int npcm_udc_notify_event(struct ci_hdrc *ci, unsigned event)
{
struct device *dev = ci->dev->parent;
switch (event) {
case CI_HDRC_CONTROLLER_RESET_EVENT:
/* clear all mode bits */
hw_write(ci, OP_USBMODE, 0xffffffff, 0x0);
break;
default:
dev_dbg(dev, "unknown ci_hdrc event (%d)\n",event);
break;
}
return 0;
}
static int npcm_udc_probe(struct platform_device *pdev)
{
int ret;
struct npcm_udc_data *ci;
struct platform_device *plat_ci;
struct device *dev = &pdev->dev;
ci = devm_kzalloc(&pdev->dev, sizeof(*ci), GFP_KERNEL);
if (!ci)
return -ENOMEM;
platform_set_drvdata(pdev, ci);
ci->core_clk = devm_clk_get_optional(dev, NULL);
if (IS_ERR(ci->core_clk))
return PTR_ERR(ci->core_clk);
ret = clk_prepare_enable(ci->core_clk);
if (ret)
return dev_err_probe(dev, ret, "failed to enable the clock: %d\n", ret);
ci->pdata.name = dev_name(dev);
ci->pdata.capoffset = DEF_CAPOFFSET;
ci->pdata.flags = CI_HDRC_REQUIRES_ALIGNED_DMA |
CI_HDRC_FORCE_VBUS_ACTIVE_ALWAYS;
ci->pdata.phy_mode = USBPHY_INTERFACE_MODE_UTMI;
ci->pdata.notify_event = npcm_udc_notify_event;
plat_ci = ci_hdrc_add_device(dev, pdev->resource, pdev->num_resources,
&ci->pdata);
if (IS_ERR(plat_ci)) {
ret = PTR_ERR(plat_ci);
dev_err(dev, "failed to register HDRC NPCM device: %d\n", ret);
goto clk_err;
}
pm_runtime_no_callbacks(dev);
pm_runtime_enable(dev);
return 0;
clk_err:
clk_disable_unprepare(ci->core_clk);
return ret;
}
static int npcm_udc_remove(struct platform_device *pdev)
{
struct npcm_udc_data *ci = platform_get_drvdata(pdev);
pm_runtime_disable(&pdev->dev);
ci_hdrc_remove_device(ci->ci);
clk_disable_unprepare(ci->core_clk);
return 0;
}
static const struct of_device_id npcm_udc_dt_match[] = {
{ .compatible = "nuvoton,npcm750-udc", },
{ .compatible = "nuvoton,npcm845-udc", },
{ }
};
MODULE_DEVICE_TABLE(of, npcm_udc_dt_match);
static struct platform_driver npcm_udc_driver = {
.probe = npcm_udc_probe,
.remove = npcm_udc_remove,
.driver = {
.name = "npcm_udc",
.of_match_table = npcm_udc_dt_match,
},
};
module_platform_driver(npcm_udc_driver);
MODULE_DESCRIPTION("NPCM USB device controller driver");
MODULE_AUTHOR("Tomer Maimon <tomer.maimon@nuvoton.com>");
MODULE_LICENSE("GPL v2");