stm32mp1: add stusb1600 support for DK1 and DK2 board
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>
diff --git a/board/st/stm32mp1/stm32mp1.c b/board/st/stm32mp1/stm32mp1.c
index b369b7a..76917b0 100644
--- a/board/st/stm32mp1/stm32mp1.c
+++ b/board/st/stm32mp1/stm32mp1.c
@@ -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 @@
#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);