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From d71534de6ab5e132d0798df30408042c229cbb62 Mon Sep 17 00:00:00 2001
From: Radek Polak <psonek2@seznam.cz>
Date: Fri, 9 Apr 2010 09:17:28 +0200
Subject: [PATCH 18/22] usbhost.patch
adds support for usb host mode and adds usb host pm sysfs node. I just copied
and modified how modem is powered up and backported changes in ohci-s3c2410.c.
No idea if this is the right approach, but it works - my usb keyboard is now
working after:
echo 1 > /sys/devices/platform/s3c2440-i2c/i2c-0/0-0073/pcf50633-gpio/reg-
fixed-voltage.2/gta02-pm-usbhost.0/power_on
echo host > /sys/devices/platform/s3c2410-ohci/usb_mode
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
---
arch/arm/mach-s3c2442/Makefile | 1 +
arch/arm/mach-s3c2442/mach-gta02.c | 50 ++++++++++++++++++++++++++++++++++-
drivers/usb/host/ohci-s3c2410.c | 48 ++++++++++++++++++++++++++++++++++
3 files changed, 97 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-s3c2442/Makefile b/arch/arm/mach-s3c2442/Makefile
index 6247ca0..3e7145c 100644
--- a/arch/arm/mach-s3c2442/Makefile
+++ b/arch/arm/mach-s3c2442/Makefile
@@ -17,6 +17,7 @@ obj-$(CONFIG_MACH_NEO1973_GTA02) += mach-gta02.o \
gta02-pm-bt.o \
gta02-pm-gps.o \
gta02-pm-gsm.o \
+ gta02-pm-usbhost.o \
gta02-pm-wlan.o
# Machine support
diff --git a/arch/arm/mach-s3c2442/mach-gta02.c b/arch/arm/mach-s3c2442/mach-gta02.c
index 8e3cc91..f1d4d51 100644
--- a/arch/arm/mach-s3c2442/mach-gta02.c
+++ b/arch/arm/mach-s3c2442/mach-gta02.c
@@ -322,6 +322,10 @@ static struct platform_device gta02_pm_gsm_dev = {
.name = "gta02-pm-gsm",
};
+static struct platform_device gta02_pm_usbhost_dev = {
+ .name = "gta02-pm-usbhost",
+};
+
static struct platform_device gta02_pm_wlan_dev = {
.name = "gta02-pm-wlan",
};
@@ -331,6 +335,11 @@ static struct regulator_consumer_supply gsm_supply_consumer = {
.supply = "GSM",
};
+static struct regulator_consumer_supply usbhost_supply_consumer = {
+ .dev = >a02_pm_usbhost_dev.dev,
+ .supply = "USBHOST",
+};
+
static struct regulator_init_data gsm_supply_init_data = {
.constraints = {
.min_uV = 3700000,
@@ -342,6 +351,17 @@ static struct regulator_init_data gsm_supply_init_data = {
.consumer_supplies = &gsm_supply_consumer,
};
+static struct regulator_init_data usbhost_supply_init_data = {
+ .constraints = {
+ .min_uV = 3700000,
+ .max_uV = 3700000,
+ .valid_modes_mask = REGULATOR_MODE_NORMAL,
+ .valid_ops_mask = REGULATOR_CHANGE_STATUS,
+ },
+ .num_consumer_supplies = 1,
+ .consumer_supplies = &usbhost_supply_consumer,
+};
+
static struct fixed_voltage_config gsm_supply_config = {
.supply_name = "GSM",
.microvolts = 3700000,
@@ -350,6 +370,14 @@ static struct fixed_voltage_config gsm_supply_config = {
.init_data = &gsm_supply_init_data,
};
+static struct fixed_voltage_config usbhost_supply_config = {
+ .supply_name = "USBHOST",
+ .microvolts = 3700000,
+ .gpio = GTA02_GPIO_PCF(PCF50633_GPO),
+ .enable_high = 1,
+ .init_data = &usbhost_supply_init_data,
+};
+
static struct platform_device gta02_gsm_supply_device = {
.name = "reg-fixed-voltage",
.id = 1,
@@ -358,6 +386,14 @@ static struct platform_device gta02_gsm_supply_device = {
},
};
+static struct platform_device gta02_usbhost_supply_device = {
+ .name = "reg-fixed-voltage",
+ .id = 2,
+ .dev = {
+ .platform_data = &usbhost_supply_config,
+ },
+};
+
static struct regulator_bulk_data gta02_gps_consumer_supply = {
.supply = "GPS",
};
@@ -1332,12 +1368,17 @@ static struct platform_device* gta02_glamo_gpio_children[] = {
static struct platform_device* gta02_pcf50633_gpio_children[] = {
>a02_gsm_supply_device,
+ >a02_usbhost_supply_device,
};
static struct platform_device* gta02_gsm_supply_children[] = {
>a02_pm_gsm_dev,
};
+static struct platform_device* gta02_usbhost_supply_children[] = {
+ >a02_pm_usbhost_dev,
+};
+
static struct platform_device* gta02_hdq_children[] = {
&bq27000_battery_device,
};
@@ -1364,14 +1405,19 @@ static struct gta02_device_children gta02_device_children[] = {
},
{
.dev_name = "pcf50633-gpio",
- .num_children = 1,
+ .num_children = 2,
.children = gta02_pcf50633_gpio_children,
},
{
.dev_name = "reg-fixed-voltage.1",
.num_children = 1,
.children = gta02_gsm_supply_children,
- }
+ },
+ {
+ .dev_name = "reg-fixed-voltage.2",
+ .num_children = 1,
+ .children = gta02_usbhost_supply_children,
+ },
};
static int gta02_add_child_devices(struct device *parent,
diff --git a/drivers/usb/host/ohci-s3c2410.c b/drivers/usb/host/ohci-s3c2410.c
index a68af2d..02bd7b0 100644
--- a/drivers/usb/host/ohci-s3c2410.c
+++ b/drivers/usb/host/ohci-s3c2410.c
@@ -22,6 +22,10 @@
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <plat/usb-control.h>
+#include <mach/hardware.h>
+#include <mach/gpio-fns.h>
+#include <mach/regs-gpio.h>
+#include <mach/gta02.h>
#define valid_port(idx) ((idx) == 1 || (idx) == 2)
@@ -306,6 +310,42 @@ static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc)
local_irq_restore(flags);
}
+/* switching of USB pads */
+static ssize_t show_usb_mode(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ if (__raw_readl(S3C24XX_MISCCR) & S3C2410_MISCCR_USBHOST)
+ return sprintf(buf, "host\n");
+
+ return sprintf(buf, "device\n");
+}
+
+static ssize_t set_usb_mode(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ if (!strncmp(buf, "host", 4)) {
+ printk("s3c2410: changing usb to host\n");
+ s3c2410_modify_misccr(S3C2410_MISCCR_USBHOST,
+ S3C2410_MISCCR_USBHOST);
+ /* FIXME:
+ * - call machine-specific disable-pullup function i
+ * - enable +Vbus (if hardware supports it)
+ */
+ s3c2410_gpio_setpin(GTA02_GPIO_USB_PULLUP, 0);
+ } else if (!strncmp(buf, "device", 6)) {
+ printk("s3c2410: changing usb to device\n");
+ s3c2410_modify_misccr(S3C2410_MISCCR_USBHOST, 0);
+ s3c2410_gpio_setpin(GTA02_GPIO_USB_PULLUP, 1);
+ } else {
+ printk("s3c2410: unknown mode\n");
+ return -EINVAL;
+ }
+
+ return count;
+}
+
+static DEVICE_ATTR(usb_mode, S_IRUGO | S_IWUSR, show_usb_mode, set_usb_mode);
+
/* may be called without controller electrically present */
/* may be called with controller, bus, and devices active */
@@ -323,6 +363,7 @@ static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc)
static void
usb_hcd_s3c2410_remove (struct usb_hcd *hcd, struct platform_device *dev)
{
+ device_remove_file(&dev->dev, &dev_attr_usb_mode);
usb_remove_hcd(hcd);
s3c2410_stop_hc(dev);
iounmap(hcd->regs);
@@ -390,8 +431,15 @@ static int usb_hcd_s3c2410_probe (const struct hc_driver *driver,
if (retval != 0)
goto err_ioremap;
+ retval = device_create_file(&dev->dev, &dev_attr_usb_mode);
+ if (retval != 0)
+ goto err_hcd;
+
return 0;
+ err_hcd:
+ usb_remove_hcd(hcd);
+
err_ioremap:
s3c2410_stop_hc(dev);
iounmap(hcd->regs);
--
1.7.0.4
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