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From 6d17298d12f873a9b03e5e79ab745fda75bd5b4e Mon Sep 17 00:00:00 2001
From: Lars-Peter Clausen <lars@metafoo.de>
Date: Tue, 21 Jul 2009 12:51:33 +0200
Subject: [PATCH] 100-udc-poll-vbus.patch
---
arch/arm/plat-s3c24xx/include/plat/udc.h | 1 +
drivers/usb/gadget/s3c2410_udc.c | 38 ++++++++++++++++++++++
drivers/usb/host/ohci-s3c2410.c | 50 ++++++++++++++++++++++++++++-
3 files changed, 87 insertions(+), 2 deletions(-)
diff --git a/arch/arm/plat-s3c24xx/include/plat/udc.h b/arch/arm/plat-s3c24xx/include/plat/udc.h
index 546bb40..763aeba 100644
--- a/arch/arm/plat-s3c24xx/include/plat/udc.h
+++ b/arch/arm/plat-s3c24xx/include/plat/udc.h
@@ -27,6 +27,7 @@ enum s3c2410_udc_cmd_e {
struct s3c2410_udc_mach_info {
void (*udc_command)(enum s3c2410_udc_cmd_e);
void (*vbus_draw)(unsigned int ma);
+ int (*get_vbus_status)(void);
unsigned int vbus_pin;
unsigned char vbus_pin_inverted;
};
diff --git a/drivers/usb/gadget/s3c2410_udc.c b/drivers/usb/gadget/s3c2410_udc.c
index a9b452f..1c7e5d7 100644
--- a/drivers/usb/gadget/s3c2410_udc.c
+++ b/drivers/usb/gadget/s3c2410_udc.c
@@ -73,6 +73,7 @@ static void __iomem *base_addr;
static u64 rsrc_start;
static u64 rsrc_len;
static struct dentry *s3c2410_udc_debugfs_root;
+static struct timer_list vbus_poll_timer;
static inline u32 udc_read(u32 reg)
{
@@ -133,6 +134,8 @@ static int dprintk(int level, const char *fmt, ...)
return 0;
}
#endif
+
+#ifdef CONFIG_USB_GADGET_DEBUG_FS
static int s3c2410_udc_debugfs_seq_show(struct seq_file *m, void *p)
{
u32 addr_reg,pwr_reg,ep_int_reg,usb_int_reg;
@@ -196,6 +199,7 @@ static const struct file_operations s3c2410_udc_debugfs_fops = {
.release = single_release,
.owner = THIS_MODULE,
};
+#endif
/* io macros */
@@ -842,6 +846,7 @@ static void s3c2410_udc_handle_ep(struct s3c2410_ep *ep)
u32 ep_csr1;
u32 idx;
+handle_ep_again:
if (likely (!list_empty(&ep->queue)))
req = list_entry(ep->queue.next,
struct s3c2410_request, queue);
@@ -881,6 +886,8 @@ static void s3c2410_udc_handle_ep(struct s3c2410_ep *ep)
if ((ep_csr1 & S3C2410_UDC_OCSR1_PKTRDY) && req) {
s3c2410_udc_read_fifo(ep,req);
+ if (s3c2410_udc_fifo_count_out())
+ goto handle_ep_again;
}
}
}
@@ -1519,6 +1526,20 @@ static irqreturn_t s3c2410_udc_vbus_irq(int irq, void *_dev)
return IRQ_HANDLED;
}
+static void s3c2410_udc_vbus_poll(unsigned long _data)
+{
+ struct s3c2410_udc *data = (struct s3c2410_udc *)_data;
+ int v;
+
+ dprintk(DEBUG_NORMAL, "%s()\n", __func__);
+ if (udc_info && udc_info->get_vbus_status) {
+ v = udc_info->get_vbus_status();
+ if ((v > -1) && (v != data->vbus))
+ s3c2410_udc_vbus_session(&data->gadget, v);
+ mod_timer(&vbus_poll_timer, jiffies + msecs_to_jiffies(900));
+ }
+}
+
static int s3c2410_vbus_draw(struct usb_gadget *_gadget, unsigned ma)
{
dprintk(DEBUG_NORMAL, "%s()\n", __func__);
@@ -1676,6 +1697,11 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
goto register_error;
}
+ if (udc_info && udc_info->get_vbus_status && !udc_info->vbus_pin) {
+ mod_timer(&vbus_poll_timer, jiffies + msecs_to_jiffies(50));
+ return 0; /* just return, vbus change will enable udc */
+ }
+
/* Enable udc */
s3c2410_udc_enable(udc);
@@ -1706,6 +1732,7 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
if (driver->disconnect)
driver->disconnect(&udc->gadget);
+ driver->unbind(&udc->gadget);
device_del(&udc->gadget.dev);
udc->driver = NULL;
@@ -1892,10 +1919,16 @@ static int s3c2410_udc_probe(struct platform_device *pdev)
}
dev_dbg(dev, "got irq %i\n", irq);
+ } else if (udc_info && udc_info->get_vbus_status) {
+ udc->vbus = 0;
+ init_timer(&vbus_poll_timer);
+ vbus_poll_timer.function = s3c2410_udc_vbus_poll;
+ vbus_poll_timer.data = (unsigned long) udc;
} else {
udc->vbus = 1;
}
+#ifdef CONFIG_USB_GADGET_DEBUG_FS
if (s3c2410_udc_debugfs_root) {
udc->regs_info = debugfs_create_file("registers", S_IRUGO,
s3c2410_udc_debugfs_root,
@@ -1903,6 +1936,7 @@ static int s3c2410_udc_probe(struct platform_device *pdev)
if (!udc->regs_info)
dev_warn(dev, "debugfs file creation failed\n");
}
+#endif
dev_dbg(dev, "probe ok\n");
@@ -1938,6 +1972,8 @@ static int s3c2410_udc_remove(struct platform_device *pdev)
if (udc_info && udc_info->vbus_pin > 0) {
irq = gpio_to_irq(udc_info->vbus_pin);
free_irq(irq, udc);
+ } else if (udc_info && udc_info->get_vbus_status) {
+ del_timer_sync(&vbus_poll_timer);
}
free_irq(IRQ_USBD, udc);
@@ -2012,12 +2048,14 @@ static int __init udc_init(void)
dprintk(DEBUG_NORMAL, "%s: version %s\n", gadget_name, DRIVER_VERSION);
+#ifdef CONFIG_USB_GADGET_DEBUG_FS
s3c2410_udc_debugfs_root = debugfs_create_dir(gadget_name, NULL);
if (IS_ERR(s3c2410_udc_debugfs_root)) {
printk(KERN_ERR "%s: debugfs dir creation failed %ld\n",
gadget_name, PTR_ERR(s3c2410_udc_debugfs_root));
s3c2410_udc_debugfs_root = NULL;
}
+#endif
retval = platform_driver_register(&udc_driver_2410);
if (retval)
diff --git a/drivers/usb/host/ohci-s3c2410.c b/drivers/usb/host/ohci-s3c2410.c
index a68af2d..3b85d41 100644
--- a/drivers/usb/host/ohci-s3c2410.c
+++ b/drivers/usb/host/ohci-s3c2410.c
@@ -21,6 +21,8 @@
#include <linux/platform_device.h>
#include <linux/clk.h>
+#include <mach/gpio-fns.h>
+#include <mach/regs-gpio.h>
#include <plat/usb-control.h>
#define valid_port(idx) ((idx) == 1 || (idx) == 2)
@@ -306,6 +308,42 @@ 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(KERN_WARNING "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(S3C2410_GPB(9), 0);
+ } else if (!strncmp(buf, "device", 6)) {
+ printk(KERN_WARNING "s3c2410: changing usb to device\n");
+ s3c2410_modify_misccr(S3C2410_MISCCR_USBHOST, 0);
+ s3c2410_gpio_setpin(S3C2410_GPB(9), 1);
+ } else {
+ printk(KERN_WARNING "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 */
@@ -486,15 +524,23 @@ static int ohci_hcd_s3c2410_drv_remove(struct platform_device *pdev)
return 0;
}
+static int ohci_hcd_s3c2410_drv_resume(struct platform_device *pdev)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(pdev);
+
+ ohci_finish_controller_resume(hcd);
+ return 0;
+}
+
static struct platform_driver ohci_hcd_s3c2410_driver = {
.probe = ohci_hcd_s3c2410_drv_probe,
.remove = ohci_hcd_s3c2410_drv_remove,
.shutdown = usb_hcd_platform_shutdown,
/*.suspend = ohci_hcd_s3c2410_drv_suspend, */
- /*.resume = ohci_hcd_s3c2410_drv_resume, */
+ .resume = ohci_hcd_s3c2410_drv_resume,
.driver = {
.owner = THIS_MODULE,
- .name = "s3c2410-ohci",
+ .name = "s3c-ohci",
},
};
--
1.5.6.5
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