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90 lines
2.6 KiB
Diff
90 lines
2.6 KiB
Diff
From 7cb1e9a0797dd5d372f943f0ed971a5b432d16aa Mon Sep 17 00:00:00 2001
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From: mokopatches <mokopatches@openmoko.org>
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Date: Fri, 25 Jul 2008 22:21:23 +0100
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Subject: [PATCH] s3c2410-usb-switch.patch
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---
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drivers/usb/host/ohci-s3c2410.c | 43 +++++++++++++++++++++++++++++++++++++++
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1 files changed, 43 insertions(+), 0 deletions(-)
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diff --git a/drivers/usb/host/ohci-s3c2410.c b/drivers/usb/host/ohci-s3c2410.c
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index 3c7a740..5877fc9 100644
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--- a/drivers/usb/host/ohci-s3c2410.c
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+++ b/drivers/usb/host/ohci-s3c2410.c
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@@ -24,6 +24,7 @@
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#include <asm/hardware.h>
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#include <asm/arch/usb-control.h>
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+#include <asm/arch/regs-gpio.h>
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#define valid_port(idx) ((idx) == 1 || (idx) == 2)
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@@ -308,6 +309,40 @@ static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc)
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local_irq_restore(flags);
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}
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+/* switching of USB pads */
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+static ssize_t show_usb_mode(struct device *dev, struct device_attribute *attr,
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+ char *buf)
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+{
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+ if (__raw_readl(S3C24XX_MISCCR) & S3C2410_MISCCR_USBHOST)
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+ return sprintf(buf, "host\n");
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+
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+ return sprintf(buf, "device\n");
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+}
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+
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+static ssize_t set_usb_mode(struct device *dev, struct device_attribute *attr,
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+ const char *buf, size_t count)
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+{
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+ if (!strncmp(buf, "host", 4)) {
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+ printk("s3c2410: changing usb to host\n");
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+ s3c2410_modify_misccr(S3C2410_MISCCR_USBHOST,
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+ S3C2410_MISCCR_USBHOST);
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+ /* FIXME:
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+ * - call machine-specific disable-pullup function i
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+ * - enable +Vbus (if hardware supports it)
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+ */
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+ s3c2410_gpio_setpin(S3C2410_GPB9, 0);
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+ } else if (!strncmp(buf, "device", 6)) {
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+ printk("s3c2410: changing usb to device\n");
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+ s3c2410_modify_misccr(S3C2410_MISCCR_USBHOST, 0);
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+ s3c2410_gpio_setpin(S3C2410_GPB9, 1);
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+ } else
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+ printk("s3c2410: unknown mode\n");
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+ return -EINVAL;
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+ return count;
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+}
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+
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+static DEVICE_ATTR(usb_mode, S_IRUGO | S_IWUSR, show_usb_mode, set_usb_mode);
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+
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/* may be called without controller electrically present */
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/* may be called with controller, bus, and devices active */
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@@ -325,6 +360,7 @@ static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc)
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static void
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usb_hcd_s3c2410_remove (struct usb_hcd *hcd, struct platform_device *dev)
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{
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+ device_remove_file(&dev->dev, &dev_attr_usb_mode);
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usb_remove_hcd(hcd);
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s3c2410_stop_hc(dev);
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iounmap(hcd->regs);
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@@ -392,8 +428,15 @@ static int usb_hcd_s3c2410_probe (const struct hc_driver *driver,
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if (retval != 0)
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goto err_ioremap;
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+ retval = device_create_file(&dev->dev, &dev_attr_usb_mode);
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+ if (retval != 0)
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+ goto err_hcd;
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+
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return 0;
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+ err_hcd:
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+ usb_remove_hcd(hcd);
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+
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err_ioremap:
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s3c2410_stop_hc(dev);
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iounmap(hcd->regs);
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--
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1.5.6.3
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