arm: imx8m: imx8mm-cl-iot-gate: detect extension board
Extension boards can be added to Compulab's iot-gate-imx8mm.
We implement extension board manager for detecting the extension
boards.
Signed-off-by: Uri Mashiach <uri.mashiach@compulab.co.il>
Signed-off-by: Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
Cc: uboot-imx <uboot-imx@nxp.com>
diff --git a/arch/arm/mach-imx/imx8m/Kconfig b/arch/arm/mach-imx/imx8m/Kconfig
index d6a8690..6c20d08 100644
--- a/arch/arm/mach-imx/imx8m/Kconfig
+++ b/arch/arm/mach-imx/imx8m/Kconfig
@@ -153,6 +153,7 @@
select IMX8MM
select SUPPORT_SPL
select IMX8M_LPDDR4
+ select SUPPORT_EXTENSION_SCAN
config TARGET_IMX8MM_CL_IOT_GATE_OPTEE
bool "CompuLab iot-gate-imx8 with optee support"
@@ -160,6 +161,7 @@
select IMX8MM
select SUPPORT_SPL
select IMX8M_LPDDR4
+ select SUPPORT_EXTENSION_SCAN
endchoice
source "board/beacon/imx8mm/Kconfig"
diff --git a/board/compulab/imx8mm-cl-iot-gate/imx8mm-cl-iot-gate.c b/board/compulab/imx8mm-cl-iot-gate/imx8mm-cl-iot-gate.c
index cd15410..7e2d88f 100644
--- a/board/compulab/imx8mm-cl-iot-gate/imx8mm-cl-iot-gate.c
+++ b/board/compulab/imx8mm-cl-iot-gate/imx8mm-cl-iot-gate.c
@@ -6,14 +6,21 @@
#include <common.h>
#include <env.h>
+#include <extension_board.h>
#include <hang.h>
+#include <i2c.h>
#include <init.h>
#include <miiphy.h>
#include <netdev.h>
#include <asm/arch/clock.h>
+#include <asm/arch/imx8mm_pins.h>
#include <asm/arch/sys_proto.h>
+#include <asm/global_data.h>
#include <asm/io.h>
+#include <asm/mach-imx/gpio.h>
+#include <asm/mach-imx/mxc_i2c.h>
+#include <asm/sections.h>
#include "ddr/ddr.h"
@@ -41,6 +48,25 @@
return 0;
}
+/* IOT_GATE-iMX8 extension boards ID */
+typedef enum {
+ IOT_GATE_EXT_EMPTY, /* No extension */
+ IOT_GATE_EXT_CAN, /* CAN bus */
+ IOT_GATE_EXT_IED, /* Bridge */
+ IOT_GATE_EXT_POE, /* POE */
+ IOT_GATE_EXT_POEV2, /* POEv2 */
+} iot_gate_imx8_ext;
+
+typedef enum {
+ IOT_GATE_IMX8_CARD_ID_EMPTY = 0, /* card id - uninhabited */
+ IOT_GATE_IMX8_CARD_ID_DI4O4 = 1, /* Card ID - IED-DI4O4 */
+ IOT_GATE_IMX8_CARD_ID_RS_485 = 2, /* Card ID - IED-RS485 */
+ IOT_GATE_IMX8_CARD_ID_TPM = 3, /* Card ID - IED-TPM */
+ IOT_GATE_IMX8_CARD_ID_CAN = 4, /* Card ID - IED-CAN */
+ IOT_GATE_IMX8_CARD_ID_CL420 = 5, /* Card ID - IED-CL420 */
+ IOT_GATE_IMX8_CARD_ID_RS_232 = 6, /* Card ID - IED-RS232 */
+} iot_gate_imx8_ied_ext;
+
static int setup_fec(void)
{
if (IS_ENABLED(CONFIG_FEC_MXC)) {
@@ -85,6 +111,313 @@
return devno;
}
+#define IOT_GATE_IMX8_EXT_I2C 3 /* I2C ID of the extension board */
+#define IOT_GATE_IMX8_EXT_I2C_ADDR_EEPROM 0x54 /* I2C address of the EEPROM */
+
+/* I2C address of the EEPROM in the POE extension */
+#define IOT_GATE_IMX8_EXT_I2C_ADDR_EEPROM_POE 0x50
+#define IOT_GATE_IMX8_EXT_I2C_ADDR_EEPROM_POEV2 0x51
+#define IOT_GATE_IMX8_EXT_I2C_ADDR_GPIO 0x22 /* I2C address of the GPIO
+ extender */
+
+static int iot_gate_imx8_ext_id = IOT_GATE_EXT_EMPTY; /* Extension board ID */
+static int iot_gate_imx8_ext_ied_id [3] = {
+ IOT_GATE_IMX8_CARD_ID_EMPTY,
+ IOT_GATE_IMX8_CARD_ID_EMPTY,
+ IOT_GATE_IMX8_CARD_ID_EMPTY };
+
+/*
+ * iot_gate_imx8_detect_ext() - extended board detection
+ * The detection is done according to the detected I2C devices.
+ */
+static void iot_gate_imx8_detect_ext(void)
+{
+ int ret;
+ struct udevice *i2c_bus, *i2c_dev;
+
+ ret = uclass_get_device_by_seq(UCLASS_I2C, IOT_GATE_IMX8_EXT_I2C,
+ &i2c_bus);
+ if (ret) {
+ printf("%s: Failed getting i2c device\n", __func__);
+ return;
+ }
+
+ ret = dm_i2c_probe(i2c_bus, IOT_GATE_IMX8_EXT_I2C_ADDR_EEPROM_POE, 0,
+ &i2c_dev);
+ if (!ret) {
+ iot_gate_imx8_ext_id = IOT_GATE_EXT_POE;
+ return;
+ }
+
+ ret = dm_i2c_probe(i2c_bus, IOT_GATE_IMX8_EXT_I2C_ADDR_EEPROM_POEV2, 0,
+ &i2c_dev);
+ if (!ret) {
+ iot_gate_imx8_ext_id = IOT_GATE_EXT_POEV2;
+ return;
+ }
+
+ ret = dm_i2c_probe(i2c_bus, IOT_GATE_IMX8_EXT_I2C_ADDR_EEPROM, 0,
+ &i2c_dev);
+ if (ret){
+ iot_gate_imx8_ext_id = IOT_GATE_EXT_EMPTY;
+ return;
+ }
+ /* Only the bridge extension includes the GPIO extender */
+ ret = dm_i2c_probe(i2c_bus, IOT_GATE_IMX8_EXT_I2C_ADDR_GPIO, 0,
+ &i2c_dev);
+ if (ret) /* GPIO extender not detected */
+ iot_gate_imx8_ext_id = IOT_GATE_EXT_CAN;
+ else /* GPIO extender detected */
+ iot_gate_imx8_ext_id = IOT_GATE_EXT_IED;
+}
+
+static iomux_v3_cfg_t const iot_gate_imx8_ext_ied_pads[] = {
+ IMX8MM_PAD_NAND_ALE_GPIO3_IO0 | MUX_PAD_CTRL(PAD_CTL_PE),
+ IMX8MM_PAD_NAND_CE0_B_GPIO3_IO1 | MUX_PAD_CTRL(PAD_CTL_PE),
+ IMX8MM_PAD_NAND_DATA00_GPIO3_IO6 | MUX_PAD_CTRL(PAD_CTL_PE),
+ IMX8MM_PAD_NAND_DATA01_GPIO3_IO7 | MUX_PAD_CTRL(PAD_CTL_PE),
+ IMX8MM_PAD_NAND_DATA02_GPIO3_IO8 | MUX_PAD_CTRL(PAD_CTL_PE),
+ IMX8MM_PAD_NAND_DATA03_GPIO3_IO9 | MUX_PAD_CTRL(PAD_CTL_PE),
+};
+
+static iomux_v3_cfg_t const iot_gate_imx8_ext_poev2_pads[] = {
+ IMX8MM_PAD_SAI3_TXD_GPIO5_IO1 | MUX_PAD_CTRL(PAD_CTL_PE |
+ PAD_CTL_PUE),
+};
+
+/* Extension board bridge GPIOs */
+#define IOT_GATE_IMX8_GPIO_EXT_IED_I0 IMX_GPIO_NR(3, 0) /* IN 0 */
+#define IOT_GATE_IMX8_GPIO_EXT_IED_I1 IMX_GPIO_NR(3, 1) /* IN 1 */
+#define IOT_GATE_IMX8_GPIO_EXT_IED_I2 IMX_GPIO_NR(3, 6) /* IN 2 */
+#define IOT_GATE_IMX8_GPIO_EXT_IED_I3 IMX_GPIO_NR(3, 7) /* IN 3 */
+#define IOT_GATE_IMX8_GPIO_EXT_IED_O0 IMX_GPIO_NR(3, 8) /* OUT 0 */
+#define IOT_GATE_IMX8_GPIO_EXT_IED_O1 IMX_GPIO_NR(3, 9) /* OUT 1 */
+#define IOT_GATE_IMX8_GPIO_EXT_IED_O2 IMX_GPIO_NR(6, 9) /* OUT 2 */
+#define IOT_GATE_IMX8_GPIO_EXT_IED_O3 IMX_GPIO_NR(6, 10)/* OUT 3 */
+
+/* Extension board POE GPIOs */
+#define IOT_GATE_IMX8_GPIO_EXT_POE_MUX IMX_GPIO_NR(5, 1)/* USB_MUX */
+
+/*
+ * iot_gate_imx8_update_pinmux() - update the pinmux
+ * Update the pinmux according to the detected extended board.
+ */
+static void iot_gate_imx8_update_pinmux(void)
+{
+ if (iot_gate_imx8_ext_id == IOT_GATE_EXT_POEV2) {
+ imx_iomux_v3_setup_multiple_pads(iot_gate_imx8_ext_poev2_pads,
+ ARRAY_SIZE(iot_gate_imx8_ext_poev2_pads));
+ gpio_request(IOT_GATE_IMX8_GPIO_EXT_POE_MUX, "poev2_usb-mux");
+ /* Update USB MUX state */
+ gpio_direction_output(IOT_GATE_IMX8_GPIO_EXT_POE_MUX, 1);
+
+ return;
+ }
+ if (iot_gate_imx8_ext_id != IOT_GATE_EXT_IED)
+ return;
+
+ imx_iomux_v3_setup_multiple_pads(iot_gate_imx8_ext_ied_pads,
+ ARRAY_SIZE(iot_gate_imx8_ext_ied_pads));
+
+ gpio_request(IOT_GATE_IMX8_GPIO_EXT_IED_I0, "ied-di4o4_i0");
+ gpio_direction_input(IOT_GATE_IMX8_GPIO_EXT_IED_I0);
+ gpio_request(IOT_GATE_IMX8_GPIO_EXT_IED_I1, "ied-di4o4_i1");
+ gpio_direction_input(IOT_GATE_IMX8_GPIO_EXT_IED_I1);
+ gpio_request(IOT_GATE_IMX8_GPIO_EXT_IED_I2, "ied-di4o4_i2");
+ gpio_direction_input(IOT_GATE_IMX8_GPIO_EXT_IED_I2);
+ gpio_request(IOT_GATE_IMX8_GPIO_EXT_IED_I3, "ied-di4o4_i3");
+ gpio_direction_input(IOT_GATE_IMX8_GPIO_EXT_IED_I3);
+ gpio_request(IOT_GATE_IMX8_GPIO_EXT_IED_O0, "ied-di4o4_o0");
+ gpio_direction_output(IOT_GATE_IMX8_GPIO_EXT_IED_O0, 0);
+ gpio_request(IOT_GATE_IMX8_GPIO_EXT_IED_O1, "ied-di4o4_o1");
+ gpio_direction_output(IOT_GATE_IMX8_GPIO_EXT_IED_O1, 0);
+ gpio_request(IOT_GATE_IMX8_GPIO_EXT_IED_O2, "ied-di4o4_o2");
+ gpio_direction_output(IOT_GATE_IMX8_GPIO_EXT_IED_O2, 0);
+ gpio_request(IOT_GATE_IMX8_GPIO_EXT_IED_O3, "ied-di4o4_o3");
+ gpio_direction_output(IOT_GATE_IMX8_GPIO_EXT_IED_O3, 0);
+}
+
+#define IOT_GATE_IMX8_GPIO_S0B0 IMX_GPIO_NR(6, 0) /* Slot ID slot 0 bit 0 */
+#define IOT_GATE_IMX8_GPIO_S0B1 IMX_GPIO_NR(6, 1) /* Slot ID slot 0 bit 1 */
+#define IOT_GATE_IMX8_GPIO_S0B2 IMX_GPIO_NR(6, 2) /* Slot ID slot 0 bit 2 */
+#define IOT_GATE_IMX8_GPIO_S1B0 IMX_GPIO_NR(6, 3) /* Slot ID slot 1 bit 0 */
+#define IOT_GATE_IMX8_GPIO_S1B1 IMX_GPIO_NR(6, 4) /* Slot ID slot 1 bit 1 */
+#define IOT_GATE_IMX8_GPIO_S1B2 IMX_GPIO_NR(6, 5) /* Slot ID slot 1 bit 2 */
+#define IOT_GATE_IMX8_GPIO_S2B0 IMX_GPIO_NR(6, 6) /* Slot ID slot 2 bit 0 */
+#define IOT_GATE_IMX8_GPIO_S2B1 IMX_GPIO_NR(6, 7) /* Slot ID slot 2 bit 1 */
+#define IOT_GATE_IMX8_GPIO_S2B2 IMX_GPIO_NR(6, 8) /* Slot ID slot 2 bit 2 */
+
+/*
+ * iot_gate_imx8_update_ext_ied()
+ * Update device tree of the extended board IED-BASE.
+ * The device tree is updated according to the detected sub modules.
+ *
+ * Return 0 for success, 1 for failure.
+ */
+static int iot_gate_imx8_update_ext_ied(void)
+{
+ int revision;
+
+ if (iot_gate_imx8_ext_id != IOT_GATE_EXT_IED)
+ return 0;
+
+ /* ID GPIO initializations */
+ if (gpio_request(IOT_GATE_IMX8_GPIO_S0B0, "id_s0b0") ||
+ gpio_request(IOT_GATE_IMX8_GPIO_S0B1, "id_s0b1") ||
+ gpio_request(IOT_GATE_IMX8_GPIO_S0B2, "id_s0b2") ||
+ gpio_request(IOT_GATE_IMX8_GPIO_S1B0, "id_s1b0") ||
+ gpio_request(IOT_GATE_IMX8_GPIO_S1B1, "id_s1b1") ||
+ gpio_request(IOT_GATE_IMX8_GPIO_S1B2, "id_s1b2") ||
+ gpio_request(IOT_GATE_IMX8_GPIO_S2B0, "id_s2b0") ||
+ gpio_request(IOT_GATE_IMX8_GPIO_S2B1, "id_s2b1") ||
+ gpio_request(IOT_GATE_IMX8_GPIO_S2B2, "id_s2b2")) {
+ printf("%s: ID GPIO request failure\n", __func__);
+ return 1;
+ }
+ gpio_direction_input(IOT_GATE_IMX8_GPIO_S0B0);
+ gpio_direction_input(IOT_GATE_IMX8_GPIO_S0B1);
+ gpio_direction_input(IOT_GATE_IMX8_GPIO_S0B2);
+ gpio_direction_input(IOT_GATE_IMX8_GPIO_S1B0);
+ gpio_direction_input(IOT_GATE_IMX8_GPIO_S1B1);
+ gpio_direction_input(IOT_GATE_IMX8_GPIO_S1B2);
+ gpio_direction_input(IOT_GATE_IMX8_GPIO_S2B0);
+ gpio_direction_input(IOT_GATE_IMX8_GPIO_S2B1);
+ gpio_direction_input(IOT_GATE_IMX8_GPIO_S2B2);
+
+ /* Get slot 0 card ID */
+ revision = gpio_get_value(IOT_GATE_IMX8_GPIO_S0B0) |
+ gpio_get_value(IOT_GATE_IMX8_GPIO_S0B1) << 1 |
+ gpio_get_value(IOT_GATE_IMX8_GPIO_S0B2) << 2;
+ iot_gate_imx8_ext_ied_id[0] = revision;
+
+ /* Get slot 1 card ID */
+ revision = gpio_get_value(IOT_GATE_IMX8_GPIO_S1B0) |
+ gpio_get_value(IOT_GATE_IMX8_GPIO_S1B1) << 1 |
+ gpio_get_value(IOT_GATE_IMX8_GPIO_S1B2) << 2;
+ iot_gate_imx8_ext_ied_id[1] = revision;
+
+ /* Get slot 2 card ID */
+ revision = gpio_get_value(IOT_GATE_IMX8_GPIO_S2B0) |
+ gpio_get_value(IOT_GATE_IMX8_GPIO_S2B1) << 1 |
+ gpio_get_value(IOT_GATE_IMX8_GPIO_S2B2) << 2;
+ iot_gate_imx8_ext_ied_id[2] = revision;
+
+ return 0;
+}
+
+int board_fix_fdt(void *rw_fdt_blob)
+{
+ return 0;
+}
+
+int extension_board_scan(struct list_head *extension_list)
+{
+ struct extension *extension = NULL;
+ int i;
+ int ret = 0;
+
+ iot_gate_imx8_detect_ext(); /* Extended board detection */
+
+ switch(iot_gate_imx8_ext_id) {
+ case IOT_GATE_EXT_EMPTY:
+ break;
+ case IOT_GATE_EXT_CAN:
+ extension = calloc(1, sizeof(struct extension));
+ snprintf(extension->name, sizeof(extension->name),
+ "IOT_GATE_EXT_CAN");
+ break;
+ case IOT_GATE_EXT_IED:
+ extension = calloc(1, sizeof(struct extension));
+ snprintf(extension->name, sizeof(extension->name),
+ "IOT_GATE_EXT_IED");
+ snprintf(extension->overlay, sizeof(extension->overlay),
+ "imx8mm-cl-iot-gate-ied.dtbo");
+ break;
+ case IOT_GATE_EXT_POE:
+ extension = calloc(1, sizeof(struct extension));
+ snprintf(extension->name, sizeof(extension->name),
+ "IOT_GATE_EXT_POE");
+ break;
+ case IOT_GATE_EXT_POEV2:
+ extension = calloc(1, sizeof(struct extension));
+ snprintf(extension->name, sizeof(extension->name),
+ "IOT_GATE_EXT_POEV2");
+ break;
+ default:
+ printf("IOT_GATE-iMX8 extension board: unknown\n");
+ break;
+ }
+
+ if (extension) {
+ snprintf(extension->owner, sizeof(extension->owner),
+ "Compulab");
+ list_add_tail(&extension->list, extension_list);
+ ret = 1;
+ } else
+ return ret;
+
+ iot_gate_imx8_update_pinmux();
+
+ iot_gate_imx8_update_ext_ied();
+ for (i=0; i<ARRAY_SIZE(iot_gate_imx8_ext_ied_id); i++) {
+ extension = NULL;
+ switch (iot_gate_imx8_ext_ied_id[i]) {
+ case IOT_GATE_IMX8_CARD_ID_EMPTY:
+ break;
+ case IOT_GATE_IMX8_CARD_ID_RS_485:
+ extension = calloc(1, sizeof(struct extension));
+ snprintf(extension->name, sizeof(extension->name),
+ "IOT_GATE_IMX8_CARD_ID_RS_485");
+ break;
+ case IOT_GATE_IMX8_CARD_ID_RS_232:
+ extension = calloc(1, sizeof(struct extension));
+ snprintf(extension->name, sizeof(extension->name),
+ "IOT_GATE_IMX8_CARD_ID_RS_232");
+ break;
+ case IOT_GATE_IMX8_CARD_ID_CAN:
+ extension = calloc(1, sizeof(struct extension));
+ snprintf(extension->name, sizeof(extension->name),
+ "IOT_GATE_IMX8_CARD_ID_CAN");
+ snprintf(extension->overlay, sizeof(extension->overlay),
+ "imx8mm-cl-iot-gate-ied-can%d.dtbo", i);
+ break;
+ case IOT_GATE_IMX8_CARD_ID_TPM:
+ extension = calloc(1, sizeof(struct extension));
+ snprintf(extension->name, sizeof(extension->name),
+ "IOT_GATE_IMX8_CARD_ID_TPM");
+ snprintf(extension->overlay, sizeof(extension->overlay),
+ "imx8mm-cl-iot-gate-ied-tpm%d.dtbo", i);
+ break;
+ case IOT_GATE_IMX8_CARD_ID_CL420:
+ extension = calloc(1, sizeof(struct extension));
+ snprintf(extension->name, sizeof(extension->name),
+ "IOT_GATE_IMX8_CARD_ID_CL420");
+ snprintf(extension->overlay, sizeof(extension->overlay),
+ "imx8mm-cl-iot-gate-ied-can%d.dtbo", i);
+ break;
+ case IOT_GATE_IMX8_CARD_ID_DI4O4:
+ extension = calloc(1, sizeof(struct extension));
+ snprintf(extension->name, sizeof(extension->name),
+ "IOT_GATE_IMX8_CARD_ID_DI4O4");
+ break;
+ default:
+ printf("%s: invalid slot %d card ID: %d\n",
+ __func__, i, iot_gate_imx8_ext_ied_id[i]);
+ break;
+ }
+ if (extension) {
+ snprintf(extension->owner, sizeof(extension->owner),
+ "Compulab");
+ snprintf(extension->other, sizeof(extension->other),
+ "On slot %d", i);
+ list_add_tail(&extension->list, extension_list);
+ ret = ret + 1;
+ }
+ }
+
+ return ret;
+}
+
int board_late_init(void)
{
if (IS_ENABLED(CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG)) {