board: st: move type-c stusb1600 controller code in a driver

Migrate the ST Microelectronics STUSB160X Type-C controller code in
a generic I2C driver in st/common, based on Linux one in :
drivers/usb/typec/stusb160x.c

This patch simplifies the stm32mp1 board code and allows to reuse
this STUSB160X driver in other boards.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>

diff --git a/board/st/common/Kconfig b/board/st/common/Kconfig
index 750dbb6..ddcf33a 100644 (file)
--- a/board/st/common/Kconfig
+++ b/board/st/common/Kconfig
@@ -69,3 +69,10 @@ config DFU_ALT_RAM0
        depends on ARCH_STM32MP && SET_DFU_ALT_INFO
        help
          This defines the partitions of ram used to build dfu dynamically.
+
+config TYPEC_STUSB160X
+       tristate "STMicroelectronics STUSB160X Type-C controller driver"
+       depends on DM_I2C
+       help
+         Say Y if your system has STMicroelectronics STUSB160X Type-C port
+         controller.

diff --git a/board/st/common/Makefile b/board/st/common/Makefile
index 012bfbb..65bbebd 100644 (file)
--- a/board/st/common/Makefile
+++ b/board/st/common/Makefile
@@ -10,3 +10,5 @@ ifeq ($(CONFIG_ARCH_STM32MP),y)
 obj-$(CONFIG_SYS_MTDPARTS_RUNTIME) += stm32mp_mtdparts.o
 obj-$(CONFIG_SET_DFU_ALT_INFO) += stm32mp_dfu.o
 endif
+
+obj-$(CONFIG_TYPEC_STUSB160X) += stusb160x.o

diff --git a/board/st/common/stusb160x.c b/board/st/common/stusb160x.c
new file mode 100644 (file)
index 0000000..f1197f9
--- /dev/null
+++ b/board/st/common/stusb160x.c
@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
+/*
+ * STMicroelectronics STUSB Type-C controller driver
+ * based on Linux drivers/usb/typec/stusb160x.c
+ *
+ * Copyright (C) 2020, STMicroelectronics - All Rights Reserved
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <i2c.h>
+
+/* REGISTER */
+#define STUSB160X_CC_CONNECTION_STATUS         0x0E
+
+/* STUSB160X_CC_CONNECTION_STATUS bitfields */
+#define STUSB160X_CC_ATTACH                    BIT(0)
+
+int stusb160x_cable_connected(void)
+{
+       struct udevice *dev;
+       int ret;
+
+       ret = uclass_get_device_by_driver(UCLASS_I2C_GENERIC,
+                                         DM_GET_DRIVER(stusb160x),
+                                         &dev);
+       if (ret < 0)
+               return ret;
+
+       ret = dm_i2c_reg_read(dev, STUSB160X_CC_CONNECTION_STATUS);
+       if (ret < 0)
+               return 0;
+
+       return ret & STUSB160X_CC_ATTACH;
+}
+
+static const struct udevice_id stusb160x_ids[] = {
+       { .compatible = "st,stusb1600" },
+       {}
+};
+
+U_BOOT_DRIVER(stusb160x) = {
+       .name = "stusb160x",
+       .id = UCLASS_I2C_GENERIC,
+       .of_match = stusb160x_ids,
+};

diff --git a/board/st/common/stusb160x.h b/board/st/common/stusb160x.h
new file mode 100644 (file)
index 0000000..fe39840
--- /dev/null
+++ b/board/st/common/stusb160x.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020, STMicroelectronics
+ */
+
+#ifdef CONFIG_TYPEC_STUSB160X
+int stusb160x_cable_connected(void);
+#else
+int stusb160x_cable_connected(void) { return -ENODEV; }
+#endif

diff --git a/board/st/stm32mp1/stm32mp1.c b/board/st/stm32mp1/stm32mp1.c
index c5c89d2..71daf18 100644 (file)
--- a/board/st/stm32mp1/stm32mp1.c
+++ b/board/st/stm32mp1/stm32mp1.c
@@ -41,6 +41,8 @@
 #include <power/regulator.h>
 #include <usb/dwc2_udc.h>
 
+#include "../../st/common/stusb160x.h"
+
 /* SYSCFG registers */
 #define SYSCFG_BOOTR           0x00
 #define SYSCFG_PMCSETR         0x04
@@ -181,64 +183,16 @@ 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);
+       /* if typec stusb160x is present, means DK1 or DK2 board */
+       ret = stusb160x_cable_connected();
+       if (ret >= 0)
+               return ret;
 
        ret = uclass_get_device_by_driver(UCLASS_USB_GADGET_GENERIC,
                                          DM_GET_DRIVER(dwc2_udc_otg),

diff --git a/configs/stm32mp15_basic_defconfig b/configs/stm32mp15_basic_defconfig
index aa05809..e68b0b8 100644 (file)
--- a/configs/stm32mp15_basic_defconfig
+++ b/configs/stm32mp15_basic_defconfig
@@ -10,6 +10,7 @@ CONFIG_SPL_MMC_SUPPORT=y
 CONFIG_SPL=y
 CONFIG_TARGET_ST_STM32MP15x=y
 CONFIG_CMD_STM32PROG=y
+CONFIG_TYPEC_STUSB160X=y
 CONFIG_ENV_OFFSET_REDUND=0x2C0000
 CONFIG_SPL_SPI_FLASH_SUPPORT=y
 CONFIG_SPL_SPI_SUPPORT=y

diff --git a/configs/stm32mp15_trusted_defconfig b/configs/stm32mp15_trusted_defconfig
index 8db52cb..f4aa843 100644 (file)
--- a/configs/stm32mp15_trusted_defconfig
+++ b/configs/stm32mp15_trusted_defconfig
@@ -6,6 +6,7 @@ CONFIG_ENV_OFFSET=0x280000
 CONFIG_ENV_SECT_SIZE=0x40000
 CONFIG_TARGET_ST_STM32MP15x=y
 CONFIG_CMD_STM32PROG=y
+CONFIG_TYPEC_STUSB160X=y
 CONFIG_ENV_OFFSET_REDUND=0x2C0000
 CONFIG_DISTRO_DEFAULTS=y
 CONFIG_FIT=y