mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
![Arnd Bergmann](/assets/img/avatar_default.png)
Lots of header files are never included outside of a mach-pxa directory and do not need to be made visible in include/mach, so let's just move them all down one level. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
390 lines
8.2 KiB
C
390 lines
8.2 KiB
C
/*
|
|
* linux/arch/arm/mach-pxa/pxa3xx-ulpi.c
|
|
*
|
|
* code specific to pxa3xx aka Monahans
|
|
*
|
|
* Copyright (C) 2010 CompuLab Ltd.
|
|
*
|
|
* 2010-13-07: Igor Grinberg <grinberg@compulab.co.il>
|
|
* initial version: pxa310 USB Host mode support
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/device.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/err.h>
|
|
#include <linux/io.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/usb.h>
|
|
#include <linux/usb/otg.h>
|
|
|
|
#include <mach/hardware.h>
|
|
#include "regs-u2d.h"
|
|
#include <linux/platform_data/usb-pxa3xx-ulpi.h>
|
|
|
|
struct pxa3xx_u2d_ulpi {
|
|
struct clk *clk;
|
|
void __iomem *mmio_base;
|
|
|
|
struct usb_phy *otg;
|
|
unsigned int ulpi_mode;
|
|
};
|
|
|
|
static struct pxa3xx_u2d_ulpi *u2d;
|
|
|
|
static inline u32 u2d_readl(u32 reg)
|
|
{
|
|
return __raw_readl(u2d->mmio_base + reg);
|
|
}
|
|
|
|
static inline void u2d_writel(u32 reg, u32 val)
|
|
{
|
|
__raw_writel(val, u2d->mmio_base + reg);
|
|
}
|
|
|
|
#if defined(CONFIG_PXA310_ULPI)
|
|
enum u2d_ulpi_phy_mode {
|
|
SYNCH = 0,
|
|
CARKIT = (1 << 0),
|
|
SER_3PIN = (1 << 1),
|
|
SER_6PIN = (1 << 2),
|
|
LOWPOWER = (1 << 3),
|
|
};
|
|
|
|
static inline enum u2d_ulpi_phy_mode pxa310_ulpi_get_phymode(void)
|
|
{
|
|
return (u2d_readl(U2DOTGUSR) >> 28) & 0xF;
|
|
}
|
|
|
|
static int pxa310_ulpi_poll(void)
|
|
{
|
|
int timeout = 50000;
|
|
|
|
while (timeout--) {
|
|
if (!(u2d_readl(U2DOTGUCR) & U2DOTGUCR_RUN))
|
|
return 0;
|
|
|
|
cpu_relax();
|
|
}
|
|
|
|
pr_warn("%s: ULPI access timed out!\n", __func__);
|
|
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
static int pxa310_ulpi_read(struct usb_phy *otg, u32 reg)
|
|
{
|
|
int err;
|
|
|
|
if (pxa310_ulpi_get_phymode() != SYNCH) {
|
|
pr_warn("%s: PHY is not in SYNCH mode!\n", __func__);
|
|
return -EBUSY;
|
|
}
|
|
|
|
u2d_writel(U2DOTGUCR, U2DOTGUCR_RUN | U2DOTGUCR_RNW | (reg << 16));
|
|
msleep(5);
|
|
|
|
err = pxa310_ulpi_poll();
|
|
if (err)
|
|
return err;
|
|
|
|
return u2d_readl(U2DOTGUCR) & U2DOTGUCR_RDATA;
|
|
}
|
|
|
|
static int pxa310_ulpi_write(struct usb_phy *otg, u32 val, u32 reg)
|
|
{
|
|
if (pxa310_ulpi_get_phymode() != SYNCH) {
|
|
pr_warn("%s: PHY is not in SYNCH mode!\n", __func__);
|
|
return -EBUSY;
|
|
}
|
|
|
|
u2d_writel(U2DOTGUCR, U2DOTGUCR_RUN | (reg << 16) | (val << 8));
|
|
msleep(5);
|
|
|
|
return pxa310_ulpi_poll();
|
|
}
|
|
|
|
struct usb_phy_io_ops pxa310_ulpi_access_ops = {
|
|
.read = pxa310_ulpi_read,
|
|
.write = pxa310_ulpi_write,
|
|
};
|
|
|
|
static void pxa310_otg_transceiver_rtsm(void)
|
|
{
|
|
u32 u2dotgcr;
|
|
|
|
/* put PHY to sync mode */
|
|
u2dotgcr = u2d_readl(U2DOTGCR);
|
|
u2dotgcr |= U2DOTGCR_RTSM | U2DOTGCR_UTMID;
|
|
u2d_writel(U2DOTGCR, u2dotgcr);
|
|
msleep(10);
|
|
|
|
/* setup OTG sync mode */
|
|
u2dotgcr = u2d_readl(U2DOTGCR);
|
|
u2dotgcr |= U2DOTGCR_ULAF;
|
|
u2dotgcr &= ~(U2DOTGCR_SMAF | U2DOTGCR_CKAF);
|
|
u2d_writel(U2DOTGCR, u2dotgcr);
|
|
}
|
|
|
|
static int pxa310_start_otg_host_transcvr(struct usb_bus *host)
|
|
{
|
|
int err;
|
|
|
|
pxa310_otg_transceiver_rtsm();
|
|
|
|
err = usb_phy_init(u2d->otg);
|
|
if (err) {
|
|
pr_err("OTG transceiver init failed");
|
|
return err;
|
|
}
|
|
|
|
err = otg_set_vbus(u2d->otg->otg, 1);
|
|
if (err) {
|
|
pr_err("OTG transceiver VBUS set failed");
|
|
return err;
|
|
}
|
|
|
|
err = otg_set_host(u2d->otg->otg, host);
|
|
if (err)
|
|
pr_err("OTG transceiver Host mode set failed");
|
|
|
|
return err;
|
|
}
|
|
|
|
static int pxa310_start_otg_hc(struct usb_bus *host)
|
|
{
|
|
u32 u2dotgcr;
|
|
int err;
|
|
|
|
/* disable USB device controller */
|
|
u2d_writel(U2DCR, u2d_readl(U2DCR) & ~U2DCR_UDE);
|
|
u2d_writel(U2DOTGCR, u2d_readl(U2DOTGCR) | U2DOTGCR_UTMID);
|
|
u2d_writel(U2DOTGICR, u2d_readl(U2DOTGICR) & ~0x37F7F);
|
|
|
|
err = pxa310_start_otg_host_transcvr(host);
|
|
if (err)
|
|
return err;
|
|
|
|
/* set xceiver mode */
|
|
if (u2d->ulpi_mode & ULPI_IC_6PIN_SERIAL)
|
|
u2d_writel(U2DP3CR, u2d_readl(U2DP3CR) & ~U2DP3CR_P2SS);
|
|
else if (u2d->ulpi_mode & ULPI_IC_3PIN_SERIAL)
|
|
u2d_writel(U2DP3CR, u2d_readl(U2DP3CR) | U2DP3CR_P2SS);
|
|
|
|
/* start OTG host controller */
|
|
u2dotgcr = u2d_readl(U2DOTGCR) | U2DOTGCR_SMAF;
|
|
u2d_writel(U2DOTGCR, u2dotgcr & ~(U2DOTGCR_ULAF | U2DOTGCR_CKAF));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void pxa310_stop_otg_hc(void)
|
|
{
|
|
pxa310_otg_transceiver_rtsm();
|
|
|
|
otg_set_host(u2d->otg->otg, NULL);
|
|
otg_set_vbus(u2d->otg->otg, 0);
|
|
usb_phy_shutdown(u2d->otg);
|
|
}
|
|
|
|
static void pxa310_u2d_setup_otg_hc(void)
|
|
{
|
|
u32 u2dotgcr;
|
|
|
|
u2dotgcr = u2d_readl(U2DOTGCR);
|
|
u2dotgcr |= U2DOTGCR_ULAF | U2DOTGCR_UTMID;
|
|
u2dotgcr &= ~(U2DOTGCR_SMAF | U2DOTGCR_CKAF);
|
|
u2d_writel(U2DOTGCR, u2dotgcr);
|
|
msleep(5);
|
|
u2d_writel(U2DOTGCR, u2dotgcr | U2DOTGCR_ULE);
|
|
msleep(5);
|
|
u2d_writel(U2DOTGICR, u2d_readl(U2DOTGICR) & ~0x37F7F);
|
|
}
|
|
|
|
static int pxa310_otg_init(struct pxa3xx_u2d_platform_data *pdata)
|
|
{
|
|
unsigned int ulpi_mode = ULPI_OTG_DRVVBUS;
|
|
|
|
if (pdata) {
|
|
if (pdata->ulpi_mode & ULPI_SER_6PIN)
|
|
ulpi_mode |= ULPI_IC_6PIN_SERIAL;
|
|
else if (pdata->ulpi_mode & ULPI_SER_3PIN)
|
|
ulpi_mode |= ULPI_IC_3PIN_SERIAL;
|
|
}
|
|
|
|
u2d->ulpi_mode = ulpi_mode;
|
|
|
|
u2d->otg = otg_ulpi_create(&pxa310_ulpi_access_ops, ulpi_mode);
|
|
if (!u2d->otg)
|
|
return -ENOMEM;
|
|
|
|
u2d->otg->io_priv = u2d->mmio_base;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void pxa310_otg_exit(void)
|
|
{
|
|
kfree(u2d->otg);
|
|
}
|
|
#else
|
|
static inline void pxa310_u2d_setup_otg_hc(void) {}
|
|
static inline int pxa310_start_otg_hc(struct usb_bus *host)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void pxa310_stop_otg_hc(void) {}
|
|
static inline int pxa310_otg_init(struct pxa3xx_u2d_platform_data *pdata)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void pxa310_otg_exit(void) {}
|
|
#endif /* CONFIG_PXA310_ULPI */
|
|
|
|
int pxa3xx_u2d_start_hc(struct usb_bus *host)
|
|
{
|
|
int err = 0;
|
|
|
|
/* In case the PXA3xx ULPI isn't used, do nothing. */
|
|
if (!u2d)
|
|
return 0;
|
|
|
|
clk_enable(u2d->clk);
|
|
|
|
if (cpu_is_pxa310()) {
|
|
pxa310_u2d_setup_otg_hc();
|
|
err = pxa310_start_otg_hc(host);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pxa3xx_u2d_start_hc);
|
|
|
|
void pxa3xx_u2d_stop_hc(struct usb_bus *host)
|
|
{
|
|
/* In case the PXA3xx ULPI isn't used, do nothing. */
|
|
if (!u2d)
|
|
return;
|
|
|
|
if (cpu_is_pxa310())
|
|
pxa310_stop_otg_hc();
|
|
|
|
clk_disable(u2d->clk);
|
|
}
|
|
EXPORT_SYMBOL_GPL(pxa3xx_u2d_stop_hc);
|
|
|
|
static int pxa3xx_u2d_probe(struct platform_device *pdev)
|
|
{
|
|
struct pxa3xx_u2d_platform_data *pdata = pdev->dev.platform_data;
|
|
struct resource *r;
|
|
int err;
|
|
|
|
u2d = kzalloc(sizeof(struct pxa3xx_u2d_ulpi), GFP_KERNEL);
|
|
if (!u2d) {
|
|
dev_err(&pdev->dev, "failed to allocate memory\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
u2d->clk = clk_get(&pdev->dev, NULL);
|
|
if (IS_ERR(u2d->clk)) {
|
|
dev_err(&pdev->dev, "failed to get u2d clock\n");
|
|
err = PTR_ERR(u2d->clk);
|
|
goto err_free_mem;
|
|
}
|
|
|
|
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!r) {
|
|
dev_err(&pdev->dev, "no IO memory resource defined\n");
|
|
err = -ENODEV;
|
|
goto err_put_clk;
|
|
}
|
|
|
|
r = request_mem_region(r->start, resource_size(r), pdev->name);
|
|
if (!r) {
|
|
dev_err(&pdev->dev, "failed to request memory resource\n");
|
|
err = -EBUSY;
|
|
goto err_put_clk;
|
|
}
|
|
|
|
u2d->mmio_base = ioremap(r->start, resource_size(r));
|
|
if (!u2d->mmio_base) {
|
|
dev_err(&pdev->dev, "ioremap() failed\n");
|
|
err = -ENODEV;
|
|
goto err_free_res;
|
|
}
|
|
|
|
if (pdata->init) {
|
|
err = pdata->init(&pdev->dev);
|
|
if (err)
|
|
goto err_free_io;
|
|
}
|
|
|
|
/* Only PXA310 U2D has OTG functionality */
|
|
if (cpu_is_pxa310()) {
|
|
err = pxa310_otg_init(pdata);
|
|
if (err)
|
|
goto err_free_plat;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, &u2d);
|
|
|
|
return 0;
|
|
|
|
err_free_plat:
|
|
if (pdata->exit)
|
|
pdata->exit(&pdev->dev);
|
|
err_free_io:
|
|
iounmap(u2d->mmio_base);
|
|
err_free_res:
|
|
release_mem_region(r->start, resource_size(r));
|
|
err_put_clk:
|
|
clk_put(u2d->clk);
|
|
err_free_mem:
|
|
kfree(u2d);
|
|
return err;
|
|
}
|
|
|
|
static int pxa3xx_u2d_remove(struct platform_device *pdev)
|
|
{
|
|
struct pxa3xx_u2d_platform_data *pdata = pdev->dev.platform_data;
|
|
struct resource *r;
|
|
|
|
if (cpu_is_pxa310()) {
|
|
pxa310_stop_otg_hc();
|
|
pxa310_otg_exit();
|
|
}
|
|
|
|
if (pdata->exit)
|
|
pdata->exit(&pdev->dev);
|
|
|
|
platform_set_drvdata(pdev, NULL);
|
|
iounmap(u2d->mmio_base);
|
|
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
release_mem_region(r->start, resource_size(r));
|
|
|
|
clk_put(u2d->clk);
|
|
|
|
kfree(u2d);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver pxa3xx_u2d_ulpi_driver = {
|
|
.driver = {
|
|
.name = "pxa3xx-u2d",
|
|
},
|
|
.probe = pxa3xx_u2d_probe,
|
|
.remove = pxa3xx_u2d_remove,
|
|
};
|
|
module_platform_driver(pxa3xx_u2d_ulpi_driver);
|
|
|
|
MODULE_DESCRIPTION("PXA3xx U2D ULPI driver");
|
|
MODULE_AUTHOR("Igor Grinberg");
|
|
MODULE_LICENSE("GPL v2");
|