[PATCH v5 1/5] usb: dwc2: Add support for STM32F429/439/469 USB OTG HS/FS in FS mode (internal PHY)
From: Bruno Herrera <hidden>
Date: 2017-02-01 01:25:43
Also in:
linux-devicetree
Subsystem:
designware usb2 drd ip driver, the rest, usb subsystem · Maintainers:
Minas Harutyunyan, Linus Torvalds, Greg Kroah-Hartman
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 <redacted> --- 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);
--
2.10.1 (Apple Git-78)