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USB: Add MSM OTG Controller driver 

This driver implements PHY initialization, clock management, ULPI IO ops
and simple OTG state machine to kick host/peripheral based on Id/VBUS
line status.  VBUS/Id lines are tied to a reference voltage on some boards.
Hence provide debugfs interface to select host/peripheral mode.

Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Pavankumar Kondeti 2010-12-07 17:53:55 +05:30 committed by Greg Kroah-Hartman
parent 05570297ec
commit e0c201f339
5 changed files with 1025 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/usb/otg/Kconfig
View File

@ -81,4 +81,14 @@ config USB_LANGWELL_OTG
To compile this driver as a module, choose M here: the
module will be called langwell_otg.
config USB_MSM_OTG_72K
tristate "OTG support for Qualcomm on-chip USB controller"
depends on (USB || USB_GADGET) && ARCH_MSM
select USB_OTG_UTILS
help
Enable this to support the USB OTG transceiver on MSM chips. It
handles PHY initialization, clock management, and workarounds
required after resetting the hardware. This driver is required
even for peripheral only or host only mode configuration.
endif # USB || OTG

1
drivers/usb/otg/Makefile
View File

@ -15,3 +15,4 @@ obj-$(CONFIG_TWL4030_USB) += twl4030-usb.o
obj-$(CONFIG_USB_LANGWELL_OTG) += langwell_otg.o
obj-$(CONFIG_NOP_USB_XCEIV) += nop-usb-xceiv.o
obj-$(CONFIG_USB_ULPI) += ulpi.o
obj-$(CONFIG_USB_MSM_OTG_72K) += msm72k_otg.o

850
drivers/usb/otg/msm72k_otg.c Normal file
View File

@ -0,0 +1,850 @@
/* Copyright (c) 2009-2010, Code Aurora Forum. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*
*/
#include <linux/module.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/err.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/uaccess.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/usb.h>
#include <linux/usb/otg.h>
#include <linux/usb/ulpi.h>
#include <linux/usb/gadget.h>
#include <linux/usb/hcd.h>
#include <linux/usb/msm_hsusb.h>
#include <linux/usb/msm_hsusb_hw.h>
#include <mach/clk.h>
#define MSM_USB_BASE (motg->regs)
#define DRIVER_NAME "msm_otg"
#define ULPI_IO_TIMEOUT_USEC (10 * 1000)
static int ulpi_read(struct otg_transceiver *otg, u32 reg)
{
struct msm_otg *motg = container_of(otg, struct msm_otg, otg);
int cnt = 0;
/* initiate read operation */
writel(ULPI_RUN | ULPI_READ | ULPI_ADDR(reg),
USB_ULPI_VIEWPORT);
/* wait for completion */
while (cnt < ULPI_IO_TIMEOUT_USEC) {
if (!(readl(USB_ULPI_VIEWPORT) & ULPI_RUN))
break;
udelay(1);
cnt++;
}
if (cnt >= ULPI_IO_TIMEOUT_USEC) {
dev_err(otg->dev, "ulpi_read: timeout %08x\n",
readl(USB_ULPI_VIEWPORT));
return -ETIMEDOUT;
}
return ULPI_DATA_READ(readl(USB_ULPI_VIEWPORT));
}
static int ulpi_write(struct otg_transceiver *otg, u32 val, u32 reg)
{
struct msm_otg *motg = container_of(otg, struct msm_otg, otg);
int cnt = 0;
/* initiate write operation */
writel(ULPI_RUN | ULPI_WRITE |
ULPI_ADDR(reg) | ULPI_DATA(val),
USB_ULPI_VIEWPORT);
/* wait for completion */
while (cnt < ULPI_IO_TIMEOUT_USEC) {
if (!(readl(USB_ULPI_VIEWPORT) & ULPI_RUN))
break;
udelay(1);
cnt++;
}
if (cnt >= ULPI_IO_TIMEOUT_USEC) {
dev_err(otg->dev, "ulpi_write: timeout\n");
return -ETIMEDOUT;
}
return 0;
}
static struct otg_io_access_ops msm_otg_io_ops = {
.read = ulpi_read,
.write = ulpi_write,
};
static void ulpi_init(struct msm_otg *motg)
{
struct msm_otg_platform_data *pdata = motg->pdata;
int *seq = pdata->phy_init_seq;
if (!seq)
return;
while (seq[0] >= 0) {
dev_vdbg(motg->otg.dev, "ulpi: write 0x%02x to 0x%02x\n",
seq[0], seq[1]);
ulpi_write(&motg->otg, seq[0], seq[1]);
seq += 2;
}
}
static int msm_otg_link_clk_reset(struct msm_otg *motg, bool assert)
{
int ret;
if (assert) {
ret = clk_reset(motg->clk, CLK_RESET_ASSERT);
if (ret)
dev_err(motg->otg.dev, "usb hs_clk assert failed\n");
} else {
ret = clk_reset(motg->clk, CLK_RESET_DEASSERT);
if (ret)
dev_err(motg->otg.dev, "usb hs_clk deassert failed\n");
}
return ret;
}
static int msm_otg_phy_clk_reset(struct msm_otg *motg)
{
int ret;
ret = clk_reset(motg->phy_reset_clk, CLK_RESET_ASSERT);
if (ret) {
dev_err(motg->otg.dev, "usb phy clk assert failed\n");
return ret;
}
usleep_range(10000, 12000);
ret = clk_reset(motg->phy_reset_clk, CLK_RESET_DEASSERT);
if (ret)
dev_err(motg->otg.dev, "usb phy clk deassert failed\n");
return ret;
}
static int msm_otg_phy_reset(struct msm_otg *motg)
{
u32 val;
int ret;
int retries;
ret = msm_otg_link_clk_reset(motg, 1);
if (ret)
return ret;
ret = msm_otg_phy_clk_reset(motg);
if (ret)
return ret;
ret = msm_otg_link_clk_reset(motg, 0);
if (ret)
return ret;
val = readl(USB_PORTSC) & ~PORTSC_PTS_MASK;
writel(val | PORTSC_PTS_ULPI, USB_PORTSC);
for (retries = 3; retries > 0; retries--) {
ret = ulpi_write(&motg->otg, ULPI_FUNC_CTRL_SUSPENDM,
ULPI_CLR(ULPI_FUNC_CTRL));
if (!ret)
break;
ret = msm_otg_phy_clk_reset(motg);
if (ret)
return ret;
}
if (!retries)
return -ETIMEDOUT;
/* This reset calibrates the phy, if the above write succeeded */
ret = msm_otg_phy_clk_reset(motg);
if (ret)
return ret;
for (retries = 3; retries > 0; retries--) {
ret = ulpi_read(&motg->otg, ULPI_DEBUG);
if (ret != -ETIMEDOUT)
break;
ret = msm_otg_phy_clk_reset(motg);
if (ret)
return ret;
}
if (!retries)
return -ETIMEDOUT;
dev_info(motg->otg.dev, "phy_reset: success\n");
return 0;
}
#define LINK_RESET_TIMEOUT_USEC (250 * 1000)
static int msm_otg_reset(struct otg_transceiver *otg)
{
struct msm_otg *motg = container_of(otg, struct msm_otg, otg);
struct msm_otg_platform_data *pdata = motg->pdata;
int cnt = 0;
int ret;
u32 val = 0;
u32 ulpi_val = 0;
ret = msm_otg_phy_reset(motg);
if (ret) {
dev_err(otg->dev, "phy_reset failed\n");
return ret;
}
ulpi_init(motg);
writel(USBCMD_RESET, USB_USBCMD);
while (cnt < LINK_RESET_TIMEOUT_USEC) {
if (!(readl(USB_USBCMD) & USBCMD_RESET))
break;
udelay(1);
cnt++;
}
if (cnt >= LINK_RESET_TIMEOUT_USEC)
return -ETIMEDOUT;
/* select ULPI phy */
writel(0x80000000, USB_PORTSC);
msleep(100);
writel(0x0, USB_AHBBURST);
writel(0x00, USB_AHBMODE);
if (pdata->otg_control == OTG_PHY_CONTROL) {
val = readl(USB_OTGSC);
if (pdata->mode == USB_OTG) {
ulpi_val = ULPI_INT_IDGRD | ULPI_INT_SESS_VALID;
val |= OTGSC_IDIE | OTGSC_BSVIE;
} else if (pdata->mode == USB_PERIPHERAL) {
ulpi_val = ULPI_INT_SESS_VALID;
val |= OTGSC_BSVIE;
}
writel(val, USB_OTGSC);
ulpi_write(otg, ulpi_val, ULPI_USB_INT_EN_RISE);
ulpi_write(otg, ulpi_val, ULPI_USB_INT_EN_FALL);
}
return 0;
}
static void msm_otg_start_host(struct otg_transceiver *otg, int on)
{
struct msm_otg *motg = container_of(otg, struct msm_otg, otg);
struct msm_otg_platform_data *pdata = motg->pdata;
struct usb_hcd *hcd;
if (!otg->host)
return;
hcd = bus_to_hcd(otg->host);
if (on) {
dev_dbg(otg->dev, "host on\n");
if (pdata->vbus_power)
pdata->vbus_power(1);
/*
* Some boards have a switch cotrolled by gpio
* to enable/disable internal HUB. Enable internal
* HUB before kicking the host.
*/
if (pdata->setup_gpio)
pdata->setup_gpio(OTG_STATE_A_HOST);
#ifdef CONFIG_USB
usb_add_hcd(hcd, hcd->irq, IRQF_SHARED);
#endif
} else {
dev_dbg(otg->dev, "host off\n");
#ifdef CONFIG_USB
usb_remove_hcd(hcd);
#endif
if (pdata->setup_gpio)
pdata->setup_gpio(OTG_STATE_UNDEFINED);
if (pdata->vbus_power)
pdata->vbus_power(0);
}
}
static int msm_otg_set_host(struct otg_transceiver *otg, struct usb_bus *host)
{
struct msm_otg *motg = container_of(otg, struct msm_otg, otg);
struct usb_hcd *hcd;
/*
* Fail host registration if this board can support
* only peripheral configuration.
*/
if (motg->pdata->mode == USB_PERIPHERAL) {
dev_info(otg->dev, "Host mode is not supported\n");
return -ENODEV;
}
if (!host) {
if (otg->state == OTG_STATE_A_HOST) {
msm_otg_start_host(otg, 0);
otg->host = NULL;
otg->state = OTG_STATE_UNDEFINED;
schedule_work(&motg->sm_work);
} else {
otg->host = NULL;
}
return 0;
}
hcd = bus_to_hcd(host);
hcd->power_budget = motg->pdata->power_budget;
otg->host = host;
dev_dbg(otg->dev, "host driver registered w/ tranceiver\n");
/*
* Kick the state machine work, if peripheral is not supported
* or peripheral is already registered with us.
*/
if (motg->pdata->mode == USB_HOST || otg->gadget)
schedule_work(&motg->sm_work);
return 0;
}
static void msm_otg_start_peripheral(struct otg_transceiver *otg, int on)
{
struct msm_otg *motg = container_of(otg, struct msm_otg, otg);
struct msm_otg_platform_data *pdata = motg->pdata;
if (!otg->gadget)
return;
if (on) {
dev_dbg(otg->dev, "gadget on\n");
/*
* Some boards have a switch cotrolled by gpio
* to enable/disable internal HUB. Disable internal
* HUB before kicking the gadget.
*/
if (pdata->setup_gpio)
pdata->setup_gpio(OTG_STATE_B_PERIPHERAL);
usb_gadget_vbus_connect(otg->gadget);
} else {
dev_dbg(otg->dev, "gadget off\n");
usb_gadget_vbus_disconnect(otg->gadget);
if (pdata->setup_gpio)
pdata->setup_gpio(OTG_STATE_UNDEFINED);
}
}
static int msm_otg_set_peripheral(struct otg_transceiver *otg,
struct usb_gadget *gadget)
{
struct msm_otg *motg = container_of(otg, struct msm_otg, otg);
/*
* Fail peripheral registration if this board can support
* only host configuration.
*/
if (motg->pdata->mode == USB_HOST) {
dev_info(otg->dev, "Peripheral mode is not supported\n");
return -ENODEV;
}
if (!gadget) {
if (otg->state == OTG_STATE_B_PERIPHERAL) {
msm_otg_start_peripheral(otg, 0);
otg->gadget = NULL;
otg->state = OTG_STATE_UNDEFINED;
schedule_work(&motg->sm_work);
} else {
otg->gadget = NULL;
}
return 0;
}
otg->gadget = gadget;
dev_dbg(otg->dev, "peripheral driver registered w/ tranceiver\n");
/*
* Kick the state machine work, if host is not supported
* or host is already registered with us.
*/
if (motg->pdata->mode == USB_PERIPHERAL || otg->host)
schedule_work(&motg->sm_work);
return 0;
}
/*
* We support OTG, Peripheral only and Host only configurations. In case
* of OTG, mode switch (host-->peripheral/peripheral-->host) can happen
* via Id pin status or user request (debugfs). Id/BSV interrupts are not
* enabled when switch is controlled by user and default mode is supplied
* by board file, which can be changed by userspace later.
*/
static void msm_otg_init_sm(struct msm_otg *motg)
{
struct msm_otg_platform_data *pdata = motg->pdata;
u32 otgsc = readl(USB_OTGSC);
switch (pdata->mode) {
case USB_OTG:
if (pdata->otg_control == OTG_PHY_CONTROL) {
if (otgsc & OTGSC_ID)
set_bit(ID, &motg->inputs);
else
clear_bit(ID, &motg->inputs);
if (otgsc & OTGSC_BSV)
set_bit(B_SESS_VLD, &motg->inputs);
else
clear_bit(B_SESS_VLD, &motg->inputs);
} else if (pdata->otg_control == OTG_USER_CONTROL) {
if (pdata->default_mode == USB_HOST) {
clear_bit(ID, &motg->inputs);
} else if (pdata->default_mode == USB_PERIPHERAL) {
set_bit(ID, &motg->inputs);
set_bit(B_SESS_VLD, &motg->inputs);
} else {
set_bit(ID, &motg->inputs);
clear_bit(B_SESS_VLD, &motg->inputs);
}
}
break;
case USB_HOST:
clear_bit(ID, &motg->inputs);
break;
case USB_PERIPHERAL:
set_bit(ID, &motg->inputs);
if (otgsc & OTGSC_BSV)
set_bit(B_SESS_VLD, &motg->inputs);
else
clear_bit(B_SESS_VLD, &motg->inputs);
break;
default:
break;
}
}
static void msm_otg_sm_work(struct work_struct *w)
{
struct msm_otg *motg = container_of(w, struct msm_otg, sm_work);
struct otg_transceiver *otg = &motg->otg;
switch (otg->state) {
case OTG_STATE_UNDEFINED:
dev_dbg(otg->dev, "OTG_STATE_UNDEFINED state\n");
msm_otg_reset(otg);
msm_otg_init_sm(motg);
otg->state = OTG_STATE_B_IDLE;
/* FALL THROUGH */
case OTG_STATE_B_IDLE:
dev_dbg(otg->dev, "OTG_STATE_B_IDLE state\n");
if (!test_bit(ID, &motg->inputs) && otg->host) {
/* disable BSV bit */
writel(readl(USB_OTGSC) & ~OTGSC_BSVIE, USB_OTGSC);
msm_otg_start_host(otg, 1);
otg->state = OTG_STATE_A_HOST;
} else if (test_bit(B_SESS_VLD, &motg->inputs) && otg->gadget) {
msm_otg_start_peripheral(otg, 1);
otg->state = OTG_STATE_B_PERIPHERAL;
}
break;
case OTG_STATE_B_PERIPHERAL:
dev_dbg(otg->dev, "OTG_STATE_B_PERIPHERAL state\n");
if (!test_bit(B_SESS_VLD, &motg->inputs) ||
!test_bit(ID, &motg->inputs)) {
msm_otg_start_peripheral(otg, 0);
otg->state = OTG_STATE_B_IDLE;
msm_otg_reset(otg);
schedule_work(w);
}
break;
case OTG_STATE_A_HOST:
dev_dbg(otg->dev, "OTG_STATE_A_HOST state\n");
if (test_bit(ID, &motg->inputs)) {
msm_otg_start_host(otg, 0);
otg->state = OTG_STATE_B_IDLE;
msm_otg_reset(otg);
schedule_work(w);
}
break;
default:
break;
}
}
static irqreturn_t msm_otg_irq(int irq, void *data)
{
struct msm_otg *motg = data;
struct otg_transceiver *otg = &motg->otg;
u32 otgsc = 0;
otgsc = readl(USB_OTGSC);
if (!(otgsc & (OTGSC_IDIS | OTGSC_BSVIS)))
return IRQ_NONE;
if ((otgsc & OTGSC_IDIS) && (otgsc & OTGSC_IDIE)) {
if (otgsc & OTGSC_ID)
set_bit(ID, &motg->inputs);
else
clear_bit(ID, &motg->inputs);
dev_dbg(otg->dev, "ID set/clear\n");
} else if ((otgsc & OTGSC_BSVIS) && (otgsc & OTGSC_BSVIE)) {
if (otgsc & OTGSC_BSV)
set_bit(B_SESS_VLD, &motg->inputs);
else
clear_bit(B_SESS_VLD, &motg->inputs);
dev_dbg(otg->dev, "BSV set/clear\n");
}
writel(otgsc, USB_OTGSC);
schedule_work(&motg->sm_work);
return IRQ_HANDLED;
}
static int msm_otg_mode_show(struct seq_file *s, void *unused)
{
struct msm_otg *motg = s->private;
struct otg_transceiver *otg = &motg->otg;
switch (otg->state) {
case OTG_STATE_A_HOST:
seq_printf(s, "host\n");
break;
case OTG_STATE_B_PERIPHERAL:
seq_printf(s, "peripheral\n");
break;
default:
seq_printf(s, "none\n");
break;
}
return 0;
}
static int msm_otg_mode_open(struct inode *inode, struct file *file)
{
return single_open(file, msm_otg_mode_show, inode->i_private);
}
static ssize_t msm_otg_mode_write(struct file *file, const char __user *ubuf,
size_t count, loff_t *ppos)
{
struct msm_otg *motg = file->private_data;
char buf[16];
struct otg_transceiver *otg = &motg->otg;
int status = count;
enum usb_mode_type req_mode;
memset(buf, 0x00, sizeof(buf));
if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) {
status = -EFAULT;
goto out;
}
if (!strncmp(buf, "host", 4)) {
req_mode = USB_HOST;
} else if (!strncmp(buf, "peripheral", 10)) {
req_mode = USB_PERIPHERAL;
} else if (!strncmp(buf, "none", 4)) {
req_mode = USB_NONE;
} else {
status = -EINVAL;
goto out;
}
switch (req_mode) {
case USB_NONE:
switch (otg->state) {
case OTG_STATE_A_HOST:
case OTG_STATE_B_PERIPHERAL:
set_bit(ID, &motg->inputs);
clear_bit(B_SESS_VLD, &motg->inputs);
break;
default:
goto out;
}
break;
case USB_PERIPHERAL:
switch (otg->state) {
case OTG_STATE_B_IDLE:
case OTG_STATE_A_HOST:
set_bit(ID, &motg->inputs);
set_bit(B_SESS_VLD, &motg->inputs);
break;
default:
goto out;
}
break;
case USB_HOST:
switch (otg->state) {
case OTG_STATE_B_IDLE:
case OTG_STATE_B_PERIPHERAL:
clear_bit(ID, &motg->inputs);
break;
default:
goto out;
}
break;
default:
goto out;
}
schedule_work(&motg->sm_work);
out:
return status;
}
const struct file_operations msm_otg_mode_fops = {
.open = msm_otg_mode_open,
.read = seq_read,
.write = msm_otg_mode_write,
.llseek = seq_lseek,
.release = single_release,
};
static struct dentry *msm_otg_dbg_root;
static struct dentry *msm_otg_dbg_mode;
static int msm_otg_debugfs_init(struct msm_otg *motg)
{
msm_otg_dbg_root = debugfs_create_dir("msm_otg", NULL);
if (!msm_otg_dbg_root || IS_ERR(msm_otg_dbg_root))
return -ENODEV;
msm_otg_dbg_mode = debugfs_create_file("mode", S_IRUGO | S_IWUSR,
msm_otg_dbg_root, motg, &msm_otg_mode_fops);
if (!msm_otg_dbg_mode) {
debugfs_remove(msm_otg_dbg_root);
msm_otg_dbg_root = NULL;
return -ENODEV;
}
return 0;
}
static void msm_otg_debugfs_cleanup(void)
{
debugfs_remove(msm_otg_dbg_mode);
debugfs_remove(msm_otg_dbg_root);
}
static int __init msm_otg_probe(struct platform_device *pdev)
{
int ret = 0;
struct resource *res;
struct msm_otg *motg;
struct otg_transceiver *otg;
dev_info(&pdev->dev, "msm_otg probe\n");
if (!pdev->dev.platform_data) {
dev_err(&pdev->dev, "No platform data given. Bailing out\n");
return -ENODEV;
}
motg = kzalloc(sizeof(struct msm_otg), GFP_KERNEL);
if (!motg) {
dev_err(&pdev->dev, "unable to allocate msm_otg\n");
return -ENOMEM;
}
motg->pdata = pdev->dev.platform_data;
otg = &motg->otg;
otg->dev = &pdev->dev;
motg->phy_reset_clk = clk_get(&pdev->dev, "usb_phy_clk");
if (IS_ERR(motg->phy_reset_clk)) {
dev_err(&pdev->dev, "failed to get usb_phy_clk\n");
ret = PTR_ERR(motg->phy_reset_clk);
goto free_motg;
}
motg->clk = clk_get(&pdev->dev, "usb_hs_clk");
if (IS_ERR(motg->clk)) {
dev_err(&pdev->dev, "failed to get usb_hs_clk\n");
ret = PTR_ERR(motg->clk);
goto put_phy_reset_clk;
}
motg->pclk = clk_get(&pdev->dev, "usb_hs_pclk");
if (IS_ERR(motg->pclk)) {
dev_err(&pdev->dev, "failed to get usb_hs_pclk\n");
ret = PTR_ERR(motg->pclk);
goto put_clk;
}
/*
* USB core clock is not present on all MSM chips. This
* clock is introduced to remove the dependency on AXI
* bus frequency.
*/
motg->core_clk = clk_get(&pdev->dev, "usb_hs_core_clk");
if (IS_ERR(motg->core_clk))
motg->core_clk = NULL;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "failed to get platform resource mem\n");
ret = -ENODEV;
goto put_core_clk;
}
motg->regs = ioremap(res->start, resource_size(res));
if (!motg->regs) {
dev_err(&pdev->dev, "ioremap failed\n");
ret = -ENOMEM;
goto put_core_clk;
}
dev_info(&pdev->dev, "OTG regs = %p\n", motg->regs);
motg->irq = platform_get_irq(pdev, 0);
if (!motg->irq) {
dev_err(&pdev->dev, "platform_get_irq failed\n");
ret = -ENODEV;
goto free_regs;
}
clk_enable(motg->clk);
clk_enable(motg->pclk);
if (motg->core_clk)
clk_enable(motg->core_clk);
writel(0, USB_USBINTR);
writel(0, USB_OTGSC);
INIT_WORK(&motg->sm_work, msm_otg_sm_work);
ret = request_irq(motg->irq, msm_otg_irq, IRQF_SHARED,
"msm_otg", motg);
if (ret) {
dev_err(&pdev->dev, "request irq failed\n");
goto disable_clks;
}
otg->init = msm_otg_reset;
otg->set_host = msm_otg_set_host;
otg->set_peripheral = msm_otg_set_peripheral;
otg->io_ops = &msm_otg_io_ops;
ret = otg_set_transceiver(&motg->otg);
if (ret) {
dev_err(&pdev->dev, "otg_set_transceiver failed\n");
goto free_irq;
}
platform_set_drvdata(pdev, motg);
device_init_wakeup(&pdev->dev, 1);
if (motg->pdata->mode == USB_OTG &&
motg->pdata->otg_control == OTG_USER_CONTROL) {
ret = msm_otg_debugfs_init(motg);
if (ret)
dev_dbg(&pdev->dev, "mode debugfs file is"
"not available\n");
}
return 0;
free_irq:
free_irq(motg->irq, motg);
disable_clks:
clk_disable(motg->pclk);
clk_disable(motg->clk);
free_regs:
iounmap(motg->regs);
put_core_clk:
if (motg->core_clk)
clk_put(motg->core_clk);
clk_put(motg->pclk);
put_clk:
clk_put(motg->clk);
put_phy_reset_clk:
clk_put(motg->phy_reset_clk);
free_motg:
kfree(motg);
return ret;
}
static int __devexit msm_otg_remove(struct platform_device *pdev)
{
struct msm_otg *motg = platform_get_drvdata(pdev);
struct otg_transceiver *otg = &motg->otg;
if (otg->host || otg->gadget)
return -EBUSY;
msm_otg_debugfs_cleanup();
cancel_work_sync(&motg->sm_work);
device_init_wakeup(&pdev->dev, 0);
otg_set_transceiver(NULL);
free_irq(motg->irq, motg);
clk_disable(motg->pclk);
clk_disable(motg->clk);
if (motg->core_clk)
clk_disable(motg->core_clk);
iounmap(motg->regs);
clk_put(motg->phy_reset_clk);
clk_put(motg->pclk);
clk_put(motg->clk);
if (motg->core_clk)
clk_put(motg->core_clk);
kfree(motg);
return 0;
}
static struct platform_driver msm_otg_driver = {
.remove = __devexit_p(msm_otg_remove),
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
},
};
static int __init msm_otg_init(void)
{
return platform_driver_probe(&msm_otg_driver, msm_otg_probe);
}
static void __exit msm_otg_exit(void)
{
platform_driver_unregister(&msm_otg_driver);
}
module_init(msm_otg_init);
module_exit(msm_otg_exit);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("MSM USB transceiver driver");

108
include/linux/usb/msm_hsusb.h Normal file
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@ -0,0 +1,108 @@
/* linux/include/asm-arm/arch-msm/hsusb.h
*
* Copyright (C) 2008 Google, Inc.
* Author: Brian Swetland <swetland@google.com>
* Copyright (c) 2009-2010, Code Aurora Forum. All rights reserved.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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.
*
*/
#ifndef __ASM_ARCH_MSM_HSUSB_H
#define __ASM_ARCH_MSM_HSUSB_H
#include <linux/types.h>
#include <linux/usb/otg.h>
/**
* Supported USB modes
*
* USB_PERIPHERAL Only peripheral mode is supported.
* USB_HOST Only host mode is supported.
* USB_OTG OTG mode is supported.
*
*/
enum usb_mode_type {
USB_NONE = 0,
USB_PERIPHERAL,
USB_HOST,
USB_OTG,
};
/**
* OTG control
*
* OTG_NO_CONTROL Id/VBUS notifications not required. Useful in host
* only configuration.
* OTG_PHY_CONTROL Id/VBUS notifications comes form USB PHY.
* OTG_PMIC_CONTROL Id/VBUS notifications comes from PMIC hardware.
* OTG_USER_CONTROL Id/VBUS notifcations comes from User via sysfs.
*
*/
enum otg_control_type {
OTG_NO_CONTROL = 0,
OTG_PHY_CONTROL,
OTG_PMIC_CONTROL,
OTG_USER_CONTROL,
};
/**
* struct msm_otg_platform_data - platform device data
* for msm72k_otg driver.
* @phy_init_seq: PHY configuration sequence. val, reg pairs
* terminated by -1.
* @vbus_power: VBUS power on/off routine.
* @power_budget: VBUS power budget in mA (0 will be treated as 500mA).
* @mode: Supported mode (OTG/peripheral/host).
* @otg_control: OTG switch controlled by user/Id pin
* @default_mode: Default operational mode. Applicable only if
* OTG switch is controller by user.
*
*/
struct msm_otg_platform_data {
int *phy_init_seq;
void (*vbus_power)(bool on);
unsigned power_budget;
enum usb_mode_type mode;
enum otg_control_type otg_control;
enum usb_mode_type default_mode;
void (*setup_gpio)(enum usb_otg_state state);
};
/**
* struct msm_otg: OTG driver data. Shared by HCD and DCD.
* @otg: USB OTG Transceiver structure.
* @pdata: otg device platform data.
* @irq: IRQ number assigned for HSUSB controller.
* @clk: clock struct of usb_hs_clk.
* @pclk: clock struct of usb_hs_pclk.
* @phy_reset_clk: clock struct of usb_phy_clk.
* @core_clk: clock struct of usb_hs_core_clk.
* @regs: ioremapped register base address.
* @inputs: OTG state machine inputs(Id, SessValid etc).
* @sm_work: OTG state machine work.
*
*/
struct msm_otg {
struct otg_transceiver otg;
struct msm_otg_platform_data *pdata;
int irq;
struct clk *clk;
struct clk *pclk;
struct clk *phy_reset_clk;
struct clk *core_clk;
void __iomem *regs;
#define ID 0
#define B_SESS_VLD 1
unsigned long inputs;
struct work_struct sm_work;
};
#endif

56
include/linux/usb/msm_hsusb_hw.h Normal file
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/*
* Copyright (C) 2007 Google, Inc.
* Author: Brian Swetland <swetland@google.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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.
*
*/
#ifndef __LINUX_USB_GADGET_MSM72K_UDC_H__
#define __LINUX_USB_GADGET_MSM72K_UDC_H__
#ifdef CONFIG_ARCH_MSM7X00A
#define USB_SBUSCFG (MSM_USB_BASE + 0x0090)
#else
#define USB_AHBBURST (MSM_USB_BASE + 0x0090)
#define USB_AHBMODE (MSM_USB_BASE + 0x0098)
#endif
#define USB_CAPLENGTH (MSM_USB_BASE + 0x0100) /* 8 bit */
#define USB_USBCMD (MSM_USB_BASE + 0x0140)
#define USB_PORTSC (MSM_USB_BASE + 0x0184)
#define USB_OTGSC (MSM_USB_BASE + 0x01A4)
#define USB_USBMODE (MSM_USB_BASE + 0x01A8)
#define USBCMD_RESET 2
#define USB_USBINTR (MSM_USB_BASE + 0x0148)
#define PORTSC_PHCD (1 << 23) /* phy suspend mode */
#define PORTSC_PTS_MASK (3 << 30)
#define PORTSC_PTS_ULPI (3 << 30)
#define USB_ULPI_VIEWPORT (MSM_USB_BASE + 0x0170)
#define ULPI_RUN (1 << 30)
#define ULPI_WRITE (1 << 29)
#define ULPI_READ (0 << 29)
#define ULPI_ADDR(n) (((n) & 255) << 16)
#define ULPI_DATA(n) ((n) & 255)
#define ULPI_DATA_READ(n) (((n) >> 8) & 255)
/* OTG definitions */
#define OTGSC_INTSTS_MASK (0x7f << 16)
#define OTGSC_ID (1 << 8)
#define OTGSC_BSV (1 << 11)
#define OTGSC_IDIS (1 << 16)
#define OTGSC_BSVIS (1 << 19)
#define OTGSC_IDIE (1 << 24)
#define OTGSC_BSVIE (1 << 27)
#endif /* __LINUX_USB_GADGET_MSM72K_UDC_H__ */