summaryrefslogtreecommitdiffstats
path: root/drivers/fsi/fsi-master-gpio.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/fsi/fsi-master-gpio.c')
-rw-r--r--drivers/fsi/fsi-master-gpio.c70
1 files changed, 36 insertions, 34 deletions
diff --git a/drivers/fsi/fsi-master-gpio.c b/drivers/fsi/fsi-master-gpio.c
index b819b3f943ef..a589a44bd805 100644
--- a/drivers/fsi/fsi-master-gpio.c
+++ b/drivers/fsi/fsi-master-gpio.c
@@ -23,26 +23,28 @@
#define FSI_BREAK_CLOCKS 256 /* Number of clocks to issue break */
#define FSI_POST_BREAK_CLOCKS 16000 /* Number clocks to set up cfam */
#define FSI_INIT_CLOCKS 5000 /* Clock out any old data */
-#define FSI_GPIO_DPOLL_CLOCKS 50 /* < 21 will cause slave to hang */
-#define FSI_GPIO_EPOLL_CLOCKS 50 /* Number of clocks for E_POLL retry */
+#define FSI_MASTER_DPOLL_CLOCKS 50 /* < 21 will cause slave to hang */
+#define FSI_MASTER_EPOLL_CLOCKS 50 /* Number of clocks for E_POLL retry */
+
#define FSI_CRC_ERR_RETRIES 10
-#define FSI_GPIO_CMD_DPOLL 0x2
-#define FSI_GPIO_CMD_EPOLL 0x3
-#define FSI_GPIO_CMD_TERM 0x3f
-#define FSI_GPIO_CMD_ABS_AR 0x4
-#define FSI_GPIO_CMD_REL_AR 0x5
-#define FSI_GPIO_CMD_SAME_AR 0x3 /* but only a 2-bit opcode... */
+#define FSI_CMD_DPOLL 0x2
+#define FSI_CMD_EPOLL 0x3
+#define FSI_CMD_TERM 0x3f
+#define FSI_CMD_ABS_AR 0x4
+#define FSI_CMD_REL_AR 0x5
+#define FSI_CMD_SAME_AR 0x3 /* but only a 2-bit opcode... */
/* Slave responses */
-#define FSI_GPIO_RESP_ACK 0 /* Success */
-#define FSI_GPIO_RESP_BUSY 1 /* Slave busy */
-#define FSI_GPIO_RESP_ERRA 2 /* Any (misc) Error */
-#define FSI_GPIO_RESP_ERRC 3 /* Slave reports master CRC error */
+#define FSI_RESP_ACK 0 /* Success */
+#define FSI_RESP_BUSY 1 /* Slave busy */
+#define FSI_RESP_ERRA 2 /* Any (misc) Error */
+#define FSI_RESP_ERRC 3 /* Slave reports master CRC error */
+
+#define FSI_MASTER_MAX_BUSY 200
-#define FSI_GPIO_MAX_BUSY 200
-#define FSI_GPIO_MTOE_COUNT 1000
-#define FSI_GPIO_CRC_SIZE 4
+#define FSI_MASTER_MTOE_COUNT 1000
+#define FSI_CRC_SIZE 4
#define LAST_ADDR_INVALID 0x1
@@ -279,19 +281,19 @@ static void build_ar_command(struct fsi_master_gpio *master,
/* we still address the byte offset within the word */
addr_bits = 2;
opcode_bits = 2;
- opcode = FSI_GPIO_CMD_SAME_AR;
+ opcode = FSI_CMD_SAME_AR;
trace_fsi_master_gpio_cmd_same_addr(master);
} else if (check_relative_address(master, id, addr, &rel_addr)) {
/* 8 bits plus sign */
addr_bits = 9;
addr = rel_addr;
- opcode = FSI_GPIO_CMD_REL_AR;
+ opcode = FSI_CMD_REL_AR;
trace_fsi_master_gpio_cmd_rel_addr(master, rel_addr);
} else {
addr_bits = 21;
- opcode = FSI_GPIO_CMD_ABS_AR;
+ opcode = FSI_CMD_ABS_AR;
trace_fsi_master_gpio_cmd_abs_addr(master, addr);
}
@@ -327,7 +329,7 @@ static void build_dpoll_command(struct fsi_gpio_msg *cmd, uint8_t slave_id)
cmd->msg = 0;
msg_push_bits(cmd, slave_id, 2);
- msg_push_bits(cmd, FSI_GPIO_CMD_DPOLL, 3);
+ msg_push_bits(cmd, FSI_CMD_DPOLL, 3);
msg_push_crc(cmd);
}
@@ -337,7 +339,7 @@ static void build_epoll_command(struct fsi_gpio_msg *cmd, uint8_t slave_id)
cmd->msg = 0;
msg_push_bits(cmd, slave_id, 2);
- msg_push_bits(cmd, FSI_GPIO_CMD_EPOLL, 3);
+ msg_push_bits(cmd, FSI_CMD_EPOLL, 3);
msg_push_crc(cmd);
}
@@ -347,7 +349,7 @@ static void build_term_command(struct fsi_gpio_msg *cmd, uint8_t slave_id)
cmd->msg = 0;
msg_push_bits(cmd, slave_id, 2);
- msg_push_bits(cmd, FSI_GPIO_CMD_TERM, 6);
+ msg_push_bits(cmd, FSI_CMD_TERM, 6);
msg_push_crc(cmd);
}
@@ -369,14 +371,14 @@ static int read_one_response(struct fsi_master_gpio *master,
local_irq_save(flags);
/* wait for the start bit */
- for (i = 0; i < FSI_GPIO_MTOE_COUNT; i++) {
+ for (i = 0; i < FSI_MASTER_MTOE_COUNT; i++) {
msg.bits = 0;
msg.msg = 0;
serial_in(master, &msg, 1);
if (msg.msg)
break;
}
- if (i == FSI_GPIO_MTOE_COUNT) {
+ if (i == FSI_MASTER_MTOE_COUNT) {
dev_dbg(master->dev,
"Master time out waiting for response\n");
local_irq_restore(flags);
@@ -392,11 +394,11 @@ static int read_one_response(struct fsi_master_gpio *master,
tag = msg.msg & 0x3;
/* If we have an ACK and we're expecting data, clock the data in too */
- if (tag == FSI_GPIO_RESP_ACK && data_size)
+ if (tag == FSI_RESP_ACK && data_size)
serial_in(master, &msg, data_size * 8);
/* read CRC */
- serial_in(master, &msg, FSI_GPIO_CRC_SIZE);
+ serial_in(master, &msg, FSI_CRC_SIZE);
local_irq_restore(flags);
@@ -439,7 +441,7 @@ static int issue_term(struct fsi_master_gpio *master, uint8_t slave)
dev_err(master->dev,
"TERM failed; lost communication with slave\n");
return -EIO;
- } else if (tag != FSI_GPIO_RESP_ACK) {
+ } else if (tag != FSI_RESP_ACK) {
dev_err(master->dev, "TERM failed; response %d\n", tag);
return -EIO;
}
@@ -475,7 +477,7 @@ retry:
trace_fsi_master_gpio_crc_rsp_error(master);
build_epoll_command(&cmd, slave);
local_irq_save(flags);
- clock_zeros(master, FSI_GPIO_EPOLL_CLOCKS);
+ clock_zeros(master, FSI_MASTER_EPOLL_CLOCKS);
serial_out(master, &cmd);
echo_delay(master);
local_irq_restore(flags);
@@ -484,7 +486,7 @@ retry:
goto fail;
switch (tag) {
- case FSI_GPIO_RESP_ACK:
+ case FSI_RESP_ACK:
if (size && data) {
uint64_t val = response.msg;
/* clear crc & mask */
@@ -497,16 +499,16 @@ retry:
}
}
break;
- case FSI_GPIO_RESP_BUSY:
+ case FSI_RESP_BUSY:
/*
* Its necessary to clock slave before issuing
* d-poll, not indicated in the hardware protocol
* spec. < 20 clocks causes slave to hang, 21 ok.
*/
- if (busy_count++ < FSI_GPIO_MAX_BUSY) {
+ if (busy_count++ < FSI_MASTER_MAX_BUSY) {
build_dpoll_command(&cmd, slave);
local_irq_save(flags);
- clock_zeros(master, FSI_GPIO_DPOLL_CLOCKS);
+ clock_zeros(master, FSI_MASTER_DPOLL_CLOCKS);
serial_out(master, &cmd);
echo_delay(master);
local_irq_restore(flags);
@@ -515,17 +517,17 @@ retry:
dev_warn(master->dev,
"ERR slave is stuck in busy state, issuing TERM\n");
local_irq_save(flags);
- clock_zeros(master, FSI_GPIO_DPOLL_CLOCKS);
+ clock_zeros(master, FSI_MASTER_DPOLL_CLOCKS);
local_irq_restore(flags);
issue_term(master, slave);
rc = -EIO;
break;
- case FSI_GPIO_RESP_ERRA:
+ case FSI_RESP_ERRA:
dev_dbg(master->dev, "ERRA received: 0x%x\n", (int)response.msg);
rc = -EIO;
break;
- case FSI_GPIO_RESP_ERRC:
+ case FSI_RESP_ERRC:
dev_dbg(master->dev, "ERRC received: 0x%x\n", (int)response.msg);
trace_fsi_master_gpio_crc_cmd_error(master);
rc = -EAGAIN;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 17:51:26 +0000