diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/i2c/busses/i2c-mv64xxx.c | 33 |
1 files changed, 15 insertions, 18 deletions
diff --git a/drivers/i2c/busses/i2c-mv64xxx.c b/drivers/i2c/busses/i2c-mv64xxx.c index 81031eb5105..22781d84f79 100644 --- a/drivers/i2c/busses/i2c-mv64xxx.c +++ b/drivers/i2c/busses/i2c-mv64xxx.c @@ -1,6 +1,4 @@ /* - * drivers/i2c/busses/i2c-mv64xxx.c - * * Driver for the i2c controller on the Marvell line of host bridges for MIPS * and PPC (e.g, gt642[46]0, mv643[46]0, mv644[46]0). * @@ -65,7 +63,6 @@ enum { MV64XXX_I2C_STATE_WAITING_FOR_ADDR_2_ACK, MV64XXX_I2C_STATE_WAITING_FOR_SLAVE_ACK, MV64XXX_I2C_STATE_WAITING_FOR_SLAVE_DATA, - MV64XXX_I2C_STATE_ABORTING, }; /* Driver actions */ @@ -85,6 +82,7 @@ struct mv64xxx_i2c_data { int irq; u32 state; u32 action; + u32 aborting; u32 cntl_bits; void __iomem *reg_base; u32 reg_base_p; @@ -122,12 +120,6 @@ mv64xxx_i2c_fsm(struct mv64xxx_i2c_data *drv_data, u32 status) return; } - if (drv_data->state == MV64XXX_I2C_STATE_ABORTING) { - drv_data->action = MV64XXX_I2C_ACTION_SEND_STOP; - drv_data->state = MV64XXX_I2C_STATE_IDLE; - return; - } - /* The status from the ctlr [mostly] tells us what to do next */ switch (status) { /* Start condition interrupt */ @@ -148,14 +140,16 @@ mv64xxx_i2c_fsm(struct mv64xxx_i2c_data *drv_data, u32 status) /* FALLTHRU */ case MV64XXX_I2C_STATUS_MAST_WR_ADDR_2_ACK: /* 0xd0 */ case MV64XXX_I2C_STATUS_MAST_WR_ACK: /* 0x28 */ - if (drv_data->bytes_left > 0) { + if ((drv_data->bytes_left == 0) + || (drv_data->aborting + && (drv_data->byte_posn != 0))) { + drv_data->action = MV64XXX_I2C_ACTION_SEND_STOP; + drv_data->state = MV64XXX_I2C_STATE_IDLE; + } else { drv_data->action = MV64XXX_I2C_ACTION_SEND_DATA; drv_data->state = MV64XXX_I2C_STATE_WAITING_FOR_SLAVE_ACK; drv_data->bytes_left--; - } else { - drv_data->action = MV64XXX_I2C_ACTION_SEND_STOP; - drv_data->state = MV64XXX_I2C_STATE_IDLE; } break; @@ -184,7 +178,7 @@ mv64xxx_i2c_fsm(struct mv64xxx_i2c_data *drv_data, u32 status) } drv_data->state = MV64XXX_I2C_STATE_WAITING_FOR_SLAVE_DATA; - if (drv_data->bytes_left == 1) + if ((drv_data->bytes_left == 1) || drv_data->aborting) drv_data->cntl_bits &= ~MV64XXX_I2C_REG_CONTROL_ACK; break; @@ -320,6 +314,7 @@ mv64xxx_i2c_prepare_for_io(struct mv64xxx_i2c_data *drv_data, drv_data->msg = msg; drv_data->byte_posn = 0; drv_data->bytes_left = msg->len; + drv_data->aborting = 0; drv_data->rc = 0; drv_data->cntl_bits = MV64XXX_I2C_REG_CONTROL_ACK | MV64XXX_I2C_REG_CONTROL_INTEN | MV64XXX_I2C_REG_CONTROL_TWSIEN; @@ -359,17 +354,19 @@ mv64xxx_i2c_wait_for_completion(struct mv64xxx_i2c_data *drv_data) } if (abort && drv_data->block) { - drv_data->state = MV64XXX_I2C_STATE_ABORTING; + drv_data->aborting = 1; spin_unlock_irqrestore(&drv_data->lock, flags); time_left = wait_event_timeout(drv_data->waitq, !drv_data->block, msecs_to_jiffies(drv_data->adapter.timeout)); - if (time_left <= 0) { + if ((time_left <= 0) && drv_data->block) { drv_data->state = MV64XXX_I2C_STATE_IDLE; dev_err(&drv_data->adapter.dev, - "mv64xxx: I2C bus locked\n"); + "mv64xxx: I2C bus locked, block: %d, " + "time_left: %d\n", drv_data->block, + (int)time_left); } } else spin_unlock_irqrestore(&drv_data->lock, flags); @@ -510,7 +507,7 @@ mv64xxx_i2c_probe(struct platform_device *pd) goto exit_kfree; } - strncpy(drv_data->adapter.name, MV64XXX_I2C_CTLR_NAME " adapter", + strlcpy(drv_data->adapter.name, MV64XXX_I2C_CTLR_NAME " adapter", I2C_NAME_SIZE); init_waitqueue_head(&drv_data->waitq); |