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stm32mp1: add stusb1600 support for DK1 and DK2 board

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The DK1 and DK2 boards use the USB Type-C controller STUSB1600.
This patch updates:
- the device tree to add the I2C node in the DT
- the board stm32mp1 to probe this I2C device and use this controller
  to check cable detection.
- the DWC2 driver to support a new dt property
  "u-boot,force-b-session-valid" which forces B session and
  device mode; it is a workaround because the VBUS sensing and
  ID detection isn't available with stusb1600.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
This commit is contained in:
Patrick Delaunay
2019-03-29 15:42:24 +01:00
committed by Marek Vasut
parent c31000c534
commit 6fe7dd3327
6 changed files with 90 additions and 3 deletions
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56
board/st/stm32mp1/stm32mp1.c
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@@ -9,15 +9,18 @@
#include <dm.h>
#include <g_dnl.h>
#include <generic-phy.h>
#include <i2c.h>
#include <led.h>
#include <misc.h>
#include <phy.h>
#include <reset.h>
#include <syscon.h>
#include <usb.h>
#include <asm/io.h>
#include <asm/gpio.h>
#include <asm/arch/stm32.h>
#include <power/regulator.h>
#include <usb/dwc2_udc.h>
/* SYSCFG registers */
#define SYSCFG_BOOTR 0x00
@@ -151,11 +154,64 @@ static void board_key_check(void)
#if defined(CONFIG_USB_GADGET) && defined(CONFIG_USB_GADGET_DWC2_OTG)
/* STMicroelectronics STUSB1600 Type-C controller */
#define STUSB1600_CC_CONNECTION_STATUS 0x0E
/* STUSB1600_CC_CONNECTION_STATUS bitfields */
#define STUSB1600_CC_ATTACH BIT(0)
static int stusb1600_init(struct udevice **dev_stusb1600)
{
ofnode node;
struct udevice *dev, *bus;
int ret;
u32 chip_addr;
*dev_stusb1600 = NULL;
/* if node stusb1600 is present, means DK1 or DK2 board */
node = ofnode_by_compatible(ofnode_null(), "st,stusb1600");
if (!ofnode_valid(node))
return -ENODEV;
ret = ofnode_read_u32(node, "reg", &chip_addr);
if (ret)
return -EINVAL;
ret = uclass_get_device_by_ofnode(UCLASS_I2C, ofnode_get_parent(node),
&bus);
if (ret) {
printf("bus for stusb1600 not found\n");
return -ENODEV;
}
ret = dm_i2c_probe(bus, chip_addr, 0, &dev);
if (!ret)
*dev_stusb1600 = dev;
return ret;
}
static int stusb1600_cable_connected(struct udevice *dev)
{
u8 status;
if (dm_i2c_read(dev, STUSB1600_CC_CONNECTION_STATUS, &status, 1))
return 0;
return status & STUSB1600_CC_ATTACH;
}
#include <usb/dwc2_udc.h>
int g_dnl_board_usb_cable_connected(void)
{
struct udevice *stusb1600;
struct udevice *dwc2_udc_otg;
int ret;
if (!stusb1600_init(&stusb1600))
return stusb1600_cable_connected(stusb1600);
ret = uclass_get_device_by_driver(UCLASS_USB_GADGET_GENERIC,
DM_GET_DRIVER(dwc2_udc_otg),
&dwc2_udc_otg);