mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-09 21:16:41 +07:00
25736e0c82
This patch let glue driver return -EPROBE_DEFER if the transceiver is not readly, so we can support defer probe on musb to fix the below error on 3.7-rc5 if transceiver drivers are built as module: [ 19.052490] unable to find transceiver of type USB2 PHY [ 19.072052] HS USB OTG: no transceiver configured [ 19.076995] musb-hdrc musb-hdrc.0.auto: musb_init_controller failed with status -19 [ 19.089355] musb-hdrc: probe of musb-hdrc.0.auto rejects match -19 [ 19.096771] driver: 'musb-omap2430': driver_bound: bound to device 'musb-omap2430' [ 19.105194] bus: 'platform': really_probe: bound device musb-omap2430 to driver musb-omap2430 [ 19.174407] bus: 'platform': add driver twl4030_usb [ 19.179656] bus: 'platform': driver_probe_device: matched device twl4030_usb with driver twl4030_usb [ 19.202270] bus: 'platform': really_probe: probing driver twl4030_usb with device twl4030_usb [ 19.214172] twl4030_usb twl4030_usb: HW_CONDITIONS 0xc0/192; link 3 [ 19.239624] musb-omap2430 musb-omap2430: musb core is not yet ready [ 19.246765] twl4030_usb twl4030_usb: Initialized TWL4030 USB module [ 19.254516] driver: 'twl4030_usb': driver_bound: bound to device 'twl4030_usb' [ 19.263580] bus: 'platform': really_probe: bound device twl4030_usb to driver twl4030_usb Cc: Sebastian Andrzej Siewior <sebastian@breakpoint.cc> Cc: <stable@vger.kernel.org> v3.8 Signed-off-by: Ming Lei <ming.lei@canonical.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
230 lines
5.0 KiB
C
230 lines
5.0 KiB
C
/*
|
|
* Copyright (C) 2010 ST-Ericsson AB
|
|
* Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
|
|
*
|
|
* Based on omap2430.c
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/err.h>
|
|
#include <linux/io.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
#include "musb_core.h"
|
|
|
|
struct ux500_glue {
|
|
struct device *dev;
|
|
struct platform_device *musb;
|
|
struct clk *clk;
|
|
};
|
|
#define glue_to_musb(g) platform_get_drvdata(g->musb)
|
|
|
|
static irqreturn_t ux500_musb_interrupt(int irq, void *__hci)
|
|
{
|
|
unsigned long flags;
|
|
irqreturn_t retval = IRQ_NONE;
|
|
struct musb *musb = __hci;
|
|
|
|
spin_lock_irqsave(&musb->lock, flags);
|
|
|
|
musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
|
|
musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
|
|
musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);
|
|
|
|
if (musb->int_usb || musb->int_tx || musb->int_rx)
|
|
retval = musb_interrupt(musb);
|
|
|
|
spin_unlock_irqrestore(&musb->lock, flags);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static int ux500_musb_init(struct musb *musb)
|
|
{
|
|
musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
|
|
if (IS_ERR_OR_NULL(musb->xceiv)) {
|
|
pr_err("HS USB OTG: no transceiver configured\n");
|
|
return -EPROBE_DEFER;
|
|
}
|
|
|
|
musb->isr = ux500_musb_interrupt;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ux500_musb_exit(struct musb *musb)
|
|
{
|
|
usb_put_phy(musb->xceiv);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct musb_platform_ops ux500_ops = {
|
|
.init = ux500_musb_init,
|
|
.exit = ux500_musb_exit,
|
|
};
|
|
|
|
static int ux500_probe(struct platform_device *pdev)
|
|
{
|
|
struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data;
|
|
struct platform_device *musb;
|
|
struct ux500_glue *glue;
|
|
struct clk *clk;
|
|
int ret = -ENOMEM;
|
|
|
|
glue = kzalloc(sizeof(*glue), GFP_KERNEL);
|
|
if (!glue) {
|
|
dev_err(&pdev->dev, "failed to allocate glue context\n");
|
|
goto err0;
|
|
}
|
|
|
|
musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
|
|
if (!musb) {
|
|
dev_err(&pdev->dev, "failed to allocate musb device\n");
|
|
goto err1;
|
|
}
|
|
|
|
clk = clk_get(&pdev->dev, "usb");
|
|
if (IS_ERR(clk)) {
|
|
dev_err(&pdev->dev, "failed to get clock\n");
|
|
ret = PTR_ERR(clk);
|
|
goto err3;
|
|
}
|
|
|
|
ret = clk_prepare_enable(clk);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to enable clock\n");
|
|
goto err4;
|
|
}
|
|
|
|
musb->dev.parent = &pdev->dev;
|
|
musb->dev.dma_mask = pdev->dev.dma_mask;
|
|
musb->dev.coherent_dma_mask = pdev->dev.coherent_dma_mask;
|
|
|
|
glue->dev = &pdev->dev;
|
|
glue->musb = musb;
|
|
glue->clk = clk;
|
|
|
|
pdata->platform_ops = &ux500_ops;
|
|
|
|
platform_set_drvdata(pdev, glue);
|
|
|
|
ret = platform_device_add_resources(musb, pdev->resource,
|
|
pdev->num_resources);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to add resources\n");
|
|
goto err5;
|
|
}
|
|
|
|
ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to add platform_data\n");
|
|
goto err5;
|
|
}
|
|
|
|
ret = platform_device_add(musb);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to register musb device\n");
|
|
goto err5;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err5:
|
|
clk_disable_unprepare(clk);
|
|
|
|
err4:
|
|
clk_put(clk);
|
|
|
|
err3:
|
|
platform_device_put(musb);
|
|
|
|
err1:
|
|
kfree(glue);
|
|
|
|
err0:
|
|
return ret;
|
|
}
|
|
|
|
static int ux500_remove(struct platform_device *pdev)
|
|
{
|
|
struct ux500_glue *glue = platform_get_drvdata(pdev);
|
|
|
|
platform_device_unregister(glue->musb);
|
|
clk_disable_unprepare(glue->clk);
|
|
clk_put(glue->clk);
|
|
kfree(glue);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int ux500_suspend(struct device *dev)
|
|
{
|
|
struct ux500_glue *glue = dev_get_drvdata(dev);
|
|
struct musb *musb = glue_to_musb(glue);
|
|
|
|
usb_phy_set_suspend(musb->xceiv, 1);
|
|
clk_disable_unprepare(glue->clk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ux500_resume(struct device *dev)
|
|
{
|
|
struct ux500_glue *glue = dev_get_drvdata(dev);
|
|
struct musb *musb = glue_to_musb(glue);
|
|
int ret;
|
|
|
|
ret = clk_prepare_enable(glue->clk);
|
|
if (ret) {
|
|
dev_err(dev, "failed to enable clock\n");
|
|
return ret;
|
|
}
|
|
|
|
usb_phy_set_suspend(musb->xceiv, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dev_pm_ops ux500_pm_ops = {
|
|
.suspend = ux500_suspend,
|
|
.resume = ux500_resume,
|
|
};
|
|
|
|
#define DEV_PM_OPS (&ux500_pm_ops)
|
|
#else
|
|
#define DEV_PM_OPS NULL
|
|
#endif
|
|
|
|
static struct platform_driver ux500_driver = {
|
|
.probe = ux500_probe,
|
|
.remove = ux500_remove,
|
|
.driver = {
|
|
.name = "musb-ux500",
|
|
.pm = DEV_PM_OPS,
|
|
},
|
|
};
|
|
|
|
MODULE_DESCRIPTION("UX500 MUSB Glue Layer");
|
|
MODULE_AUTHOR("Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>");
|
|
MODULE_LICENSE("GPL v2");
|
|
module_platform_driver(ux500_driver);
|