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usb: dwc2: Add support for STM32F429/439/469 USB OTG HS/FS in FS mode (internal PHY)

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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.

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Bruno Herrera <bruherrera@gmail.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Bruno Herrera 2017-01-31 23:25:43 -02:00 committed by Felipe Balbi
parent f87599a0d7
commit e35b135055
4 changed files with 40 additions and 1 deletions
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5
drivers/usb/dwc2/core.h
View File

@ -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;

15
drivers/usb/dwc2/hcd.c
View File

@ -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);
}
}
}
/*

2
drivers/usb/dwc2/hw.h
View File

@ -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)

19
drivers/usb/dwc2/params.c
View File

@ -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);