On Monday, November 09, 2015 at 03:59:56 PM, Sanchayan Maity wrote:
> Add board_usb_phy_mode function for detecting whether a port is
> being used as host or client using a GPIO. On Colibri Vybrid we
> provide GPIO 102 for this very same purpose.
>
> Signed-off-by: Sanchayan Maity <maitysancha...@gmail.com>
> ---
> Changes since v3:
> Return USB_INIT_DEVICE or USB_INIT_HOST after checking for
> the GPIO state to account for the fact that the previous
> logic breaks in case if the enum for USB mode were to ever
> be changed.
>
> Add comments based on Stefan's feedback.
>
> Changes since v2:
>
> Instead of returning 0 from board_usb_phy_mode return it as
> USB_INIT_HOST.
>
> Changes since v1:
>
> Move the GPIO request call to the board_init function as all
> further calls to board_usb_phy_mode will actually result in the
> gpio_request failing.
> ---
> board/toradex/colibri_vf/colibri_vf.c | 36
> ++++++++++++++++++++++++++++++++++- 1 file changed, 35 insertions(+), 1
> deletion(-)
>
> diff --git a/board/toradex/colibri_vf/colibri_vf.c
> b/board/toradex/colibri_vf/colibri_vf.c index a6d1c5b..b1a3375 100644
> --- a/board/toradex/colibri_vf/colibri_vf.c
> +++ b/board/toradex/colibri_vf/colibri_vf.c
> @@ -21,6 +21,7 @@
> #include <i2c.h>
> #include <g_dnl.h>
> #include <asm/gpio.h>
> +#include <usb.h>
>
> DECLARE_GLOBAL_DATA_PTR;
>
> @@ -34,6 +35,7 @@ DECLARE_GLOBAL_DATA_PTR;
> PAD_CTL_DSE_50ohm | PAD_CTL_OBE_IBE_ENABLE)
>
> #define USB_PEN_GPIO 83
> +#define USB_CDET_GPIO 102
>
> static struct ddrmc_cr_setting colibri_vf_cr_settings[] = {
> /* levelling */
> @@ -92,6 +94,7 @@ static struct ddrmc_cr_setting colibri_vf_cr_settings[] =
> {
>
> static const iomux_v3_cfg_t usb_pads[] = {
> VF610_PAD_PTD4__GPIO_83,
> + VF610_PAD_PTC29__GPIO_102,
> };
>
> int dram_init(void)
> @@ -280,7 +283,6 @@ static void setup_iomux_gpio(void)
> VF610_PAD_PTB23__GPIO_93,
> VF610_PAD_PTB26__GPIO_96,
> VF610_PAD_PTB28__GPIO_98,
> - VF610_PAD_PTC29__GPIO_102,
> VF610_PAD_PTC30__GPIO_103,
> VF610_PAD_PTA7__GPIO_134,
> };
> @@ -509,6 +511,10 @@ int board_init(void)
>
> setbits_le32(&scsc->sosc_ctr, SCSC_SOSC_CTR_SOSC_EN);
>
> +#ifdef CONFIG_USB_EHCI_VF
> + gpio_request(USB_CDET_GPIO, "usb-cdet-gpio");
> +#endif
> +
> return 0;
> }
>
> @@ -554,4 +560,32 @@ int board_ehci_hcd_init(int port)
> }
> return 0;
> }
> +
> +int board_usb_phy_mode(int port)
> +{
> + switch (port) {
> + case 0:
> + /*
> + * Port 0 is used only in client mode on Colibri Vybrid modules
> + * Check for state of USB client gpio pin and accordingly return
> + * USB_INIT_DEVICE or USB_INIT_HOST.
> + */
> + if (gpio_get_value(USB_CDET_GPIO))
> + return USB_INIT_DEVICE;
> + else
> + return USB_INIT_HOST;
> + break;
You don't have to break after return.
> + case 1:
> + /* Port 1 is used only in host mode on Colibri Vybrid modules */
> + return USB_INIT_HOST;
> + break;
DTTO
> + default:
> + /*
> + * There are only two USB controllers on Vybrid. Ideally we will
> + * not reach here. However return USB_INIT_HOST if we do.
> + */
> + return USB_INIT_HOST;
> + break;
DTTO.
> + }
> +}
> #endif
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