diff options
Diffstat (limited to 'drivers/usb/gadget/tegra_udc.c')
| -rw-r--r-- | drivers/usb/gadget/tegra_udc.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/drivers/usb/gadget/tegra_udc.c b/drivers/usb/gadget/tegra_udc.c index c130dae3a8e9..074a9b1ce6d9 100644 --- a/drivers/usb/gadget/tegra_udc.c +++ b/drivers/usb/gadget/tegra_udc.c @@ -52,8 +52,8 @@ #include "tegra_udc.h" -#define DRIVER_DESC "Nvidia Tegra High-Speed USB SOC \ - Device Controller driver" +#define DRIVER_DESC "Nvidia Tegra High-Speed USB SOC " \ + "Device Controller driver" #define DRIVER_AUTHOR "Venkat Moganty/Rakesh Bodla" #define DRIVER_VERSION "Apr 30, 2012" @@ -95,6 +95,11 @@ static const u8 tegra_udc_test_packet[53] = { 0xfc, 0x7e, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd, 0x7e }; +#ifdef CONFIG_MACH_COLIBRI_T20 +/* To limit the speed of USB to full speed */ +extern int g_usb_high_speed; +#endif /* CONFIG_MACH_COLIBRI_T20 */ + static struct tegra_udc *the_udc; #ifdef CONFIG_TEGRA_GADGET_BOOST_CPU_FREQ @@ -253,6 +258,16 @@ static int dr_controller_reset(struct tegra_udc *udc) cpu_relax(); } +#ifdef CONFIG_MACH_COLIBRI_T20 + /* To limit the speed of USB to full speed */ + if (!g_usb_high_speed) { + tmp = udc_readl(udc, PORTSCX_REG_OFFSET); + tmp |= PORTSCX_PORT_FORCE_FULL_SPEED; + udc_writel(udc, tmp, PORTSCX_REG_OFFSET); + tmp = udc_readl(udc, PORTSCX_REG_OFFSET); + } +#endif /* CONFIG_MACH_COLIBRI_T20 */ + DBG("%s(%d) END\n", __func__, __LINE__); return 0; } |