On 1/31/2017 5:26 PM, Bruno Herrera wrote:
> This patch introduces a new parameter to activate USB OTG HS/FS core
> embedded phy transceiver. The STM32F4x9 SoC uses the GGPIO register
> to enable the transceiver.
> Also add the dwc2_set_params function for stm32f4 otg fs.
>
> Signed-off-by: Bruno Herrera <bruherr...@gmail.com>
Acked-by: John Youn <johny...@synopsys.com>
Regards,
John
> ---
> drivers/usb/dwc2/core.h | 5 +++++
> drivers/usb/dwc2/hcd.c | 15 ++++++++++++++-
> drivers/usb/dwc2/hw.h | 2 ++
> drivers/usb/dwc2/params.c | 19 +++++++++++++++++++
> 4 files changed, 40 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
> index b9b62f1..252400b 100644
> --- a/drivers/usb/dwc2/core.h
> +++ b/drivers/usb/dwc2/core.h
> @@ -423,6 +423,10 @@ enum dwc2_ep0_state {
> * needed.
> * 0 - No (default)
> * 1 - Yes
> + * @activate_stm_fs_transceiver: Activate internal transceiver using GGPIO
> + * register.
> + * 0 - Deactivate the transceiver (default)
> + * 1 - Activate the transceiver
> * @g_dma: Enables gadget dma usage (default: autodetect).
> * @g_dma_desc: Enables gadget descriptor DMA (default: autodetect).
> * @g_rx_fifo_size: The periodic rx fifo size for the device, in
> @@ -477,6 +481,7 @@ struct dwc2_core_params {
> bool uframe_sched;
> bool external_id_pin_ctl;
> bool hibernation;
> + bool activate_stm_fs_transceiver;
> u16 max_packet_count;
> u32 max_transfer_size;
> u32 ahbcfg;
> diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
> index a73722e..b5a70b6 100644
> --- a/drivers/usb/dwc2/hcd.c
> +++ b/drivers/usb/dwc2/hcd.c
> @@ -121,7 +121,7 @@ static void dwc2_init_fs_ls_pclk_sel(struct dwc2_hsotg
> *hsotg)
>
> static int dwc2_fs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
> {
> - u32 usbcfg, i2cctl;
> + u32 usbcfg, ggpio, i2cctl;
> int retval = 0;
>
> /*
> @@ -145,6 +145,19 @@ static int dwc2_fs_phy_init(struct dwc2_hsotg *hsotg,
> bool select_phy)
> return retval;
> }
> }
> +
> + if (hsotg->params.activate_stm_fs_transceiver) {
> + ggpio = dwc2_readl(hsotg->regs + GGPIO);
> + if (!(ggpio & GGPIO_STM32_OTG_GCCFG_PWRDWN)) {
> + dev_dbg(hsotg->dev, "Activating transceiver\n");
> + /*
> + * STM32F4x9 uses the GGPIO register as general
> + * core configuration register.
> + */
> + ggpio |= GGPIO_STM32_OTG_GCCFG_PWRDWN;
> + dwc2_writel(ggpio, hsotg->regs + GGPIO);
> + }
> + }
> }
>
> /*
> diff --git a/drivers/usb/dwc2/hw.h b/drivers/usb/dwc2/hw.h
> index bde7248..4592012 100644
> --- a/drivers/usb/dwc2/hw.h
> +++ b/drivers/usb/dwc2/hw.h
> @@ -225,6 +225,8 @@
>
> #define GPVNDCTL HSOTG_REG(0x0034)
> #define GGPIO HSOTG_REG(0x0038)
> +#define GGPIO_STM32_OTG_GCCFG_PWRDWN BIT(16)
> +
> #define GUID HSOTG_REG(0x003c)
> #define GSNPSID HSOTG_REG(0x0040)
> #define GHWCFG1 HSOTG_REG(0x0044)
> diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c
> index 2990c34..9cd8722 100644
> --- a/drivers/usb/dwc2/params.c
> +++ b/drivers/usb/dwc2/params.c
> @@ -120,6 +120,22 @@ static void dwc2_set_amcc_params(struct dwc2_hsotg
> *hsotg)
> p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT;
> }
>
> +static void dwc2_set_stm32f4x9_fsotg_params(struct dwc2_hsotg *hsotg)
> +{
> + struct dwc2_core_params *p = &hsotg->params;
> +
> + p->otg_cap = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
> + p->speed = DWC2_SPEED_PARAM_FULL;
> + p->host_rx_fifo_size = 128;
> + p->host_nperio_tx_fifo_size = 96;
> + p->host_perio_tx_fifo_size = 96;
> + p->max_packet_count = 256;
> + p->phy_type = DWC2_PHY_TYPE_PARAM_FS;
> + p->i2c_enable = false;
> + p->uframe_sched = false;
> + p->activate_stm_fs_transceiver = true;
> +}
> +
> const struct of_device_id dwc2_of_match_table[] = {
> { .compatible = "brcm,bcm2835-usb", .data = dwc2_set_bcm_params },
> { .compatible = "hisilicon,hi6220-usb", .data = dwc2_set_his_params },
> @@ -133,6 +149,9 @@ const struct of_device_id dwc2_of_match_table[] = {
> { .compatible = "amlogic,meson-gxbb-usb",
> .data = dwc2_set_amlogic_params },
> { .compatible = "amcc,dwc-otg", .data = dwc2_set_amcc_params },
> + { .compatible = "st,stm32f4x9-fsotg",
> + .data = dwc2_set_stm32f4x9_fsotg_params },
> + { .compatible = "st,stm32f4x9-hsotg" },
> {},
> };
> MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
>
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