diff options
| -rw-r--r-- | drivers/i2c/busses/i2c-mchp-pci1xxxx.c | 60 | ||||
| -rw-r--r-- | drivers/i2c/busses/i2c-ocores.c | 35 |
2 files changed, 49 insertions, 46 deletions
diff --git a/drivers/i2c/busses/i2c-mchp-pci1xxxx.c b/drivers/i2c/busses/i2c-mchp-pci1xxxx.c index 09af75921147..b21ffd6df927 100644 --- a/drivers/i2c/busses/i2c-mchp-pci1xxxx.c +++ b/drivers/i2c/busses/i2c-mchp-pci1xxxx.c @@ -48,9 +48,9 @@ * SR_HOLD_TIME_XK_TICKS field will indicate the number of ticks of the * baud clock required to program 'Hold Time' at X KHz. */ -#define SR_HOLD_TIME_100K_TICKS 133 -#define SR_HOLD_TIME_400K_TICKS 20 -#define SR_HOLD_TIME_1000K_TICKS 11 +#define SR_HOLD_TIME_100K_TICKS 150 +#define SR_HOLD_TIME_400K_TICKS 20 +#define SR_HOLD_TIME_1000K_TICKS 12 #define SMB_CORE_COMPLETION_REG_OFF3 (SMBUS_MAST_CORE_ADDR_BASE + 0x23) @@ -65,17 +65,17 @@ * the baud clock required to program 'fair idle delay' at X KHz. Fair idle * delay establishes the MCTP T(IDLE_DELAY) period. */ -#define FAIR_BUS_IDLE_MIN_100K_TICKS 969 -#define FAIR_BUS_IDLE_MIN_400K_TICKS 157 -#define FAIR_BUS_IDLE_MIN_1000K_TICKS 157 +#define FAIR_BUS_IDLE_MIN_100K_TICKS 992 +#define FAIR_BUS_IDLE_MIN_400K_TICKS 500 +#define FAIR_BUS_IDLE_MIN_1000K_TICKS 500 /* * FAIR_IDLE_DELAY_XK_TICKS field will indicate the number of ticks of the * baud clock required to satisfy the fairness protocol at X KHz. */ -#define FAIR_IDLE_DELAY_100K_TICKS 1000 -#define FAIR_IDLE_DELAY_400K_TICKS 500 -#define FAIR_IDLE_DELAY_1000K_TICKS 500 +#define FAIR_IDLE_DELAY_100K_TICKS 963 +#define FAIR_IDLE_DELAY_400K_TICKS 156 +#define FAIR_IDLE_DELAY_1000K_TICKS 156 #define SMB_IDLE_SCALING_100K \ ((FAIR_IDLE_DELAY_100K_TICKS << 16) | FAIR_BUS_IDLE_MIN_100K_TICKS) @@ -105,7 +105,7 @@ */ #define BUS_CLK_100K_LOW_PERIOD_TICKS 156 #define BUS_CLK_400K_LOW_PERIOD_TICKS 41 -#define BUS_CLK_1000K_LOW_PERIOD_TICKS 15 +#define BUS_CLK_1000K_LOW_PERIOD_TICKS 15 /* * BUS_CLK_XK_HIGH_PERIOD_TICKS field defines the number of I2C Baud Clock @@ -131,7 +131,7 @@ */ #define CLK_SYNC_100K 4 #define CLK_SYNC_400K 4 -#define CLK_SYNC_1000K 4 +#define CLK_SYNC_1000K 4 #define SMB_CORE_DATA_TIMING_REG_OFF (SMBUS_MAST_CORE_ADDR_BASE + 0x40) @@ -142,25 +142,25 @@ * determines the SCLK hold time following SDAT driven low during the first * START bit in a transfer. */ -#define FIRST_START_HOLD_100K_TICKS 22 -#define FIRST_START_HOLD_400K_TICKS 16 -#define FIRST_START_HOLD_1000K_TICKS 6 +#define FIRST_START_HOLD_100K_TICKS 23 +#define FIRST_START_HOLD_400K_TICKS 8 +#define FIRST_START_HOLD_1000K_TICKS 12 /* * STOP_SETUP_XK_TICKS will indicate the number of ticks of the baud clock * required to program 'STOP_SETUP' timer at X KHz. This timer determines the * SDAT setup time from the rising edge of SCLK for a STOP condition. */ -#define STOP_SETUP_100K_TICKS 157 +#define STOP_SETUP_100K_TICKS 150 #define STOP_SETUP_400K_TICKS 20 -#define STOP_SETUP_1000K_TICKS 12 +#define STOP_SETUP_1000K_TICKS 12 /* * RESTART_SETUP_XK_TICKS will indicate the number of ticks of the baud clock * required to program 'RESTART_SETUP' timer at X KHz. This timer determines the * SDAT setup time from the rising edge of SCLK for a repeated START condition. */ -#define RESTART_SETUP_100K_TICKS 157 +#define RESTART_SETUP_100K_TICKS 156 #define RESTART_SETUP_400K_TICKS 20 #define RESTART_SETUP_1000K_TICKS 12 @@ -169,7 +169,7 @@ * required to program 'DATA_HOLD' timer at X KHz. This timer determines the * SDAT hold time following SCLK driven low. */ -#define DATA_HOLD_100K_TICKS 2 +#define DATA_HOLD_100K_TICKS 12 #define DATA_HOLD_400K_TICKS 2 #define DATA_HOLD_1000K_TICKS 2 @@ -190,35 +190,35 @@ * Bus Idle Minimum time = BUS_IDLE_MIN[7:0] x Baud_Clock_Period x * (BUS_IDLE_MIN_XK_TICKS[7] ? 4,1) */ -#define BUS_IDLE_MIN_100K_TICKS 167UL -#define BUS_IDLE_MIN_400K_TICKS 139UL -#define BUS_IDLE_MIN_1000K_TICKS 133UL +#define BUS_IDLE_MIN_100K_TICKS 36UL +#define BUS_IDLE_MIN_400K_TICKS 10UL +#define BUS_IDLE_MIN_1000K_TICKS 4UL /* * CTRL_CUM_TIME_OUT_XK_TICKS defines SMBus Controller Cumulative Time-Out. * SMBus Controller Cumulative Time-Out duration = * CTRL_CUM_TIME_OUT_XK_TICKS[7:0] x Baud_Clock_Period x 2048 */ -#define CTRL_CUM_TIME_OUT_100K_TICKS 159 -#define CTRL_CUM_TIME_OUT_400K_TICKS 159 -#define CTRL_CUM_TIME_OUT_1000K_TICKS 159 +#define CTRL_CUM_TIME_OUT_100K_TICKS 76 +#define CTRL_CUM_TIME_OUT_400K_TICKS 76 +#define CTRL_CUM_TIME_OUT_1000K_TICKS 76 /* * TARGET_CUM_TIME_OUT_XK_TICKS defines SMBus Target Cumulative Time-Out duration. * SMBus Target Cumulative Time-Out duration = TARGET_CUM_TIME_OUT_XK_TICKS[7:0] x * Baud_Clock_Period x 4096 */ -#define TARGET_CUM_TIME_OUT_100K_TICKS 199 -#define TARGET_CUM_TIME_OUT_400K_TICKS 199 -#define TARGET_CUM_TIME_OUT_1000K_TICKS 199 +#define TARGET_CUM_TIME_OUT_100K_TICKS 95 +#define TARGET_CUM_TIME_OUT_400K_TICKS 95 +#define TARGET_CUM_TIME_OUT_1000K_TICKS 95 /* * CLOCK_HIGH_TIME_OUT_XK defines Clock High time out period. * Clock High time out period = CLOCK_HIGH_TIME_OUT_XK[7:0] x Baud_Clock_Period x 8 */ -#define CLOCK_HIGH_TIME_OUT_100K_TICKS 204 -#define CLOCK_HIGH_TIME_OUT_400K_TICKS 204 -#define CLOCK_HIGH_TIME_OUT_1000K_TICKS 204 +#define CLOCK_HIGH_TIME_OUT_100K_TICKS 97 +#define CLOCK_HIGH_TIME_OUT_400K_TICKS 97 +#define CLOCK_HIGH_TIME_OUT_1000K_TICKS 97 #define TO_SCALING_100K \ ((BUS_IDLE_MIN_100K_TICKS << 24) | (CTRL_CUM_TIME_OUT_100K_TICKS << 16) | \ diff --git a/drivers/i2c/busses/i2c-ocores.c b/drivers/i2c/busses/i2c-ocores.c index a0af027db04c..2e575856c5cd 100644 --- a/drivers/i2c/busses/i2c-ocores.c +++ b/drivers/i2c/busses/i2c-ocores.c @@ -342,18 +342,18 @@ static int ocores_poll_wait(struct ocores_i2c *i2c) * ocores_isr(), we just add our polling code around it. * * It can run in atomic context + * + * Return: 0 on success, -ETIMEDOUT on timeout */ -static void ocores_process_polling(struct ocores_i2c *i2c) +static int ocores_process_polling(struct ocores_i2c *i2c) { - while (1) { - irqreturn_t ret; - int err; + irqreturn_t ret; + int err = 0; + while (1) { err = ocores_poll_wait(i2c); - if (err) { - i2c->state = STATE_ERROR; + if (err) break; /* timeout */ - } ret = ocores_isr(-1, i2c); if (ret == IRQ_NONE) @@ -364,13 +364,15 @@ static void ocores_process_polling(struct ocores_i2c *i2c) break; } } + + return err; } static int ocores_xfer_core(struct ocores_i2c *i2c, struct i2c_msg *msgs, int num, bool polling) { - int ret; + int ret = 0; u8 ctrl; ctrl = oc_getreg(i2c, OCI2C_CONTROL); @@ -388,15 +390,16 @@ static int ocores_xfer_core(struct ocores_i2c *i2c, oc_setreg(i2c, OCI2C_CMD, OCI2C_CMD_START); if (polling) { - ocores_process_polling(i2c); + ret = ocores_process_polling(i2c); } else { - ret = wait_event_timeout(i2c->wait, - (i2c->state == STATE_ERROR) || - (i2c->state == STATE_DONE), HZ); - if (ret == 0) { - ocores_process_timeout(i2c); - return -ETIMEDOUT; - } + if (wait_event_timeout(i2c->wait, + (i2c->state == STATE_ERROR) || + (i2c->state == STATE_DONE), HZ) == 0) + ret = -ETIMEDOUT; + } + if (ret) { + ocores_process_timeout(i2c); + return ret; } return (i2c->state == STATE_DONE) ? num : -EIO; |