[PATCH v7 8/9] hwmon: pmbus: adm1266: program configuration

alexandru.tachici
2020-07-27T16:18:35Z

Writing the configuration Intel hex file to the nvmem,
of an adm1266, with offset 0x30000, will now
trigger the configuration programming.

During this process the adm1266 sequencer will be
stopped and at the end will be issued a seq reset
(see AN-1453 Programming the configuration).

Signed-off-by: Alexandru Tachici <alexandru.tachici@analog.com>
---
drivers/hwmon/pmbus/adm1266.c | 179 +++++++++++++++++++++++++++++++++-
1 file changed, 178 insertions(+), 1 deletion(-)

diff --git a/drivers/hwmon/pmbus/adm1266.c b/drivers/hwmon/pmbus/adm1266.c
index f851c6617870..50386c98d714 100644
--- a/drivers/hwmon/pmbus/adm1266.c
+++ b/drivers/hwmon/pmbus/adm1266.c
@@ -40,7 +40,10 @@
#define ADM1266_BLACKBOX_INFO 0xE6
#define ADM1266_PDIO_STATUS 0xE9
#define ADM1266_GPIO_STATUS 0xEA
+#define ADM1266_STATUS_MFR_2 0xED
+#define ADM1266_REFRESH_FLASH 0xF5
#define ADM1266_MEMORY_CONFIG 0xF8
+#define ADM1266_MEMORY_CRC 0xF9
#define ADM1266_SWITCH_MEMORY 0xFA
#define ADM1266_UPDATE_FW 0xFC
#define ADM1266_FW_PASSWORD 0xFD
@@ -66,6 +69,11 @@

/* ADM1266 STATUS_MFR defines */
#define ADM1266_STATUS_PART_LOCKED(x) FIELD_GET(BIT(2), x)
+#define ADM1266_RUNNING_REFRESH(x) FIELD_GET(BIT(3), x)
+#define ADM1266_ALL_CRC_FAULT(x) FIELD_GET(BIT(5), x)
+
+/* ADM1266 STATUS_MFR_2 defines */
+#define ADM1266_MAIN_CONFIG_FAULT(x) FIELD_GET(GENMASK(9, 8), x)

/* ADM1266 GO_COMMAND defines */
#define ADM1266_GO_COMMAND_STOP BIT(0)
@@ -74,6 +82,8 @@

#define ADM1266_FIRMWARE_OFFSET 0x00000
#define ADM1266_FIRMWARE_SIZE 131072
+#define ADM1266_CONFIG_OFFSET 0x30000
+#define ADM1266_CONFIG_SIZE 131072
#define ADM1266_BLACKBOX_OFFSET 0x7F700
#define ADM1266_BLACKBOX_SIZE 64

@@ -117,6 +127,11 @@ static const struct nvmem_cell_info adm1266_nvmem_cells[] = {
.offset = ADM1266_FIRMWARE_OFFSET,
.bytes = ADM1266_FIRMWARE_SIZE,
},
+ {
+ .name = "configuration",
+ .offset = ADM1266_CONFIG_OFFSET,
+ .bytes = ADM1266_CONFIG_SIZE,
+ },
};

DECLARE_CRC8_TABLE(pmbus_crc_table);
@@ -520,6 +535,9 @@ static int adm1266_read_mem_cell(struct adm1266_data *data, const struct nvmem_c
case ADM1266_FIRMWARE_OFFSET:
/* firmware is write-only */
return 0;
+ case ADM1266_CONFIG_OFFSET:
+ /* configuration is write-only */
+ return 0;
default:
return -EINVAL;
}
@@ -676,6 +694,7 @@ static int adm1266_write_hex(struct adm1266_data *data,
u8 first_writes[7];
u8 byte_count;
u8 reg_address;
+ bool to_slaves = false;
int ret;
int i;

@@ -706,7 +725,10 @@ static int adm1266_write_hex(struct adm1266_data *data,
if (ret < 0)
return ret;

- ret = adm1266_group_cmd(data, reg_address, write_buf, byte_count, true);
+ if (offset == ADM1266_FIRMWARE_OFFSET)
+ to_slaves = true;
+
+ ret = adm1266_group_cmd(data, reg_address, write_buf, byte_count, to_slaves);
if (ret < 0) {
dev_err(&data->client->dev, "Firmware write error: %d.", ret);
return ret;
@@ -731,6 +753,87 @@ static int adm1266_write_hex(struct adm1266_data *data,
return 0;
}

+static int adm1266_verify_memory(struct adm1266_data *data)
+{
+ char cmd[2];
+ int ret;
+ int reg;
+
+ cmd[0] = 0x1;
+ cmd[1] = 0x0;
+ ret = adm1266_group_cmd(data, ADM1266_MEMORY_CRC, cmd,
+ sizeof(cmd), true);
+ if (ret < 0)
+ return ret;
+
+ /* after issuing a memory recalculate crc command, wait 1000 ms */
+ msleep(1000);
+
+ reg = pmbus_read_word_data(data->client, 0, 0xFF, ADM1266_STATUS_MFR_2);
+ if (reg < 0)
+ return reg;
+
+ if (ADM1266_MAIN_CONFIG_FAULT(reg)) {
+ dev_err(&data->client->dev, "Main memory corrupted.");
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
+static int adm1266_refresh_memory(struct adm1266_data *data)
+{
+ unsigned int timeout = 9000;
+ int ret;
+ u8 cmd[2];
+
+ cmd[0] = 0x2;
+ ret = adm1266_group_cmd(data, ADM1266_REFRESH_FLASH, cmd, 1, true);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Could not refresh flash.");
+ return ret;
+ }
+
+ /* after issuing a refresh flash command, wait 9000 ms */
+ msleep(9000);
+
+ do {
+ msleep(1000);
+ timeout -= 1000;
+
+ ret = pmbus_read_byte_data(data->client, 0, ADM1266_STATUS_MFR);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Could not read status.");
+ return ret;
+ }
+
+ } while (ADM1266_RUNNING_REFRESH(ret) && timeout > 0);
+
+ if (timeout == 0)
+ return -ETIMEDOUT;
+
+ cmd[0] = 0x1;
+ cmd[1] = 0x0;
+ ret = adm1266_group_cmd(data, ADM1266_MEMORY_CRC, cmd,
+ sizeof(cmd), true);
+ if (ret < 0)
+ return ret;
+
+ /* after issuing a memory recalculate crc command, wait 1000 ms */
+ msleep(1000);
+
+ ret = pmbus_read_byte_data(data->client, 0, ADM1266_STATUS_MFR);
+ if (ret < 0)
+ return ret;
+
+ if (ADM1266_ALL_CRC_FAULT(ret)) {
+ dev_err(&data->client->dev, "CRC checks failed.");
+ return ret;
+ }
+
+ return 0;
+}
+
static int adm1266_program_firmware(struct adm1266_data *data)
{
u8 write_data[3];
@@ -783,6 +886,77 @@ static int adm1266_program_firmware(struct adm1266_data *data)
return ret;
}

+static int adm1266_program_config(struct adm1266_data *data)
+{
+ u8 cmd[2];
+ u8 value;
+ int ret;
+
+ value = ADM1266_GO_COMMAND_STOP | ADM1266_GO_COMMAND_SEQ_RES;
+ ret = pmbus_write_word_data(data->client, 0, ADM1266_GO_COMMAND, value);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Could not stop sequence.");
+ return ret;
+ }
+
+ /* after issuing a stop command, wait 100 ms */
+ msleep(100);
+
+ ret = adm1266_unlock_all_dev(data);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Could not unlock dev.");
+ goto lock_all_devices;
+ }
+
+ value = 0;
+ ret = i2c_smbus_write_block_data(data->client, ADM1266_SWITCH_MEMORY, 1, &value);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Could not switch to main mem.");
+ goto lock_all_devices;
+ }
+
+ /* after issuing a SWITCH_MEMORY command, wait 1000 ms */
+ msleep(1000);
+
+ ret = adm1266_write_hex(data, ADM1266_CONFIG_OFFSET, ADM1266_CONFIG_SIZE);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Could not write configuration.");
+ goto lock_all_devices;
+ }
+
+ ret = pmbus_write_byte(data->client, 0, ADM1266_STORE_USER_ALL);
+ if (ret < 0)
+ return ret;
+
+ /* after issuing a STORE_USER_ALL command, wait 300 ms */
+ msleep(300);
+
+ if (!data->master_dev)
+ goto lock_all_devices;
+
+ ret = adm1266_verify_memory(data);
+ if (ret < 0)
+ goto lock_all_devices;
+
+ cmd[0] = 0;
+ cmd[1] = 0;
+ ret = adm1266_group_cmd(data, ADM1266_GO_COMMAND, cmd, sizeof(cmd), true);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Could not restart sequence.");
+ goto lock_all_devices;
+ }
+
+ /* after issuing a restart sequence command, wait 350 ms */
+ msleep(350);
+
+ ret = adm1266_refresh_memory(data);
+
+lock_all_devices:
+ adm1266_lock_all_dev(data);
+
+ return ret;
+}
+
/* check if firmware/config write has ended */
static bool adm1266_check_ending(struct adm1266_data *data, unsigned int offset,
unsigned int size)
@@ -824,6 +998,9 @@ static int adm1266_write_mem_cell(struct adm1266_data *data,

program_func = &adm1266_program_firmware;
break;
+ case ADM1266_CONFIG_OFFSET:
+ program_func = &adm1266_program_config;
+ break;
default:
return -EINVAL;
}
--
2.20.1