X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fi2c%2Fbusses%2Fi2c-mv64xxx.c;h=ac5cde1bbd2ba24333d2360ce3b253d60a3426c8;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=5b852782d2f5956cc4984a617facd1da2e64f592;hpb=cee37fe97739d85991964371c1f3a745c00dd236;p=linux-2.6.git diff --git a/drivers/i2c/busses/i2c-mv64xxx.c b/drivers/i2c/busses/i2c-mv64xxx.c index 5b852782d..ac5cde1bb 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). * @@ -17,6 +15,8 @@ #include #include #include +#include + #include /* Register defines */ @@ -63,7 +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 */ @@ -83,6 +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; @@ -120,12 +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 */ @@ -146,14 +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; @@ -182,7 +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; @@ -318,6 +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; @@ -357,17 +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); @@ -423,18 +422,16 @@ static int mv64xxx_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num) { struct mv64xxx_i2c_data *drv_data = i2c_get_adapdata(adap); - int i, rc = 0; + int i, rc; for (i=0; iplatform_data; + struct mv64xxx_i2c_pdata *pdata = pd->dev.platform_data; int rc; if ((pd->id != 0) || !pdata) return -ENODEV; - drv_data = kmalloc(sizeof(struct mv64xxx_i2c_data), GFP_KERNEL); - + drv_data = kzalloc(sizeof(struct mv64xxx_i2c_data), GFP_KERNEL); if (!drv_data) return -ENOMEM; - memset(drv_data, 0, sizeof(struct mv64xxx_i2c_data)); - if (mv64xxx_i2c_map_regs(pd, drv_data)) { rc = -ENODEV; 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); @@ -523,24 +516,29 @@ mv64xxx_i2c_probe(struct device *dev) drv_data->freq_m = pdata->freq_m; drv_data->freq_n = pdata->freq_n; drv_data->irq = platform_get_irq(pd, 0); - drv_data->adapter.id = I2C_ALGO_MV64XXX | I2C_HW_MV64XXX; + if (drv_data->irq < 0) { + rc = -ENXIO; + goto exit_unmap_regs; + } + drv_data->adapter.id = I2C_HW_MV64XXX; drv_data->adapter.algo = &mv64xxx_i2c_algo; drv_data->adapter.owner = THIS_MODULE; drv_data->adapter.class = I2C_CLASS_HWMON; drv_data->adapter.timeout = pdata->timeout; drv_data->adapter.retries = pdata->retries; - dev_set_drvdata(dev, drv_data); + platform_set_drvdata(pd, drv_data); i2c_set_adapdata(&drv_data->adapter, drv_data); if (request_irq(drv_data->irq, mv64xxx_i2c_intr, 0, - MV64XXX_I2C_CTLR_NAME, drv_data)) { - - dev_err(dev, "mv64xxx: Can't register intr handler " - "irq: %d\n", drv_data->irq); + MV64XXX_I2C_CTLR_NAME, drv_data)) { + dev_err(&drv_data->adapter.dev, + "mv64xxx: Can't register intr handler irq: %d\n", + drv_data->irq); rc = -EINVAL; goto exit_unmap_regs; } else if ((rc = i2c_add_adapter(&drv_data->adapter)) != 0) { - dev_err(dev, "mv64xxx: Can't add i2c adapter, rc: %d\n", -rc); + dev_err(&drv_data->adapter.dev, + "mv64xxx: Can't add i2c adapter, rc: %d\n", -rc); goto exit_free_irq; } @@ -558,9 +556,9 @@ mv64xxx_i2c_probe(struct device *dev) } static int __devexit -mv64xxx_i2c_remove(struct device *dev) +mv64xxx_i2c_remove(struct platform_device *dev) { - struct mv64xxx_i2c_data *drv_data = dev_get_drvdata(dev); + struct mv64xxx_i2c_data *drv_data = platform_get_drvdata(dev); int rc; rc = i2c_del_adapter(&drv_data->adapter); @@ -571,23 +569,25 @@ mv64xxx_i2c_remove(struct device *dev) return rc; } -static struct device_driver mv64xxx_i2c_driver = { - .name = MV64XXX_I2C_CTLR_NAME, - .bus = &platform_bus_type, +static struct platform_driver mv64xxx_i2c_driver = { .probe = mv64xxx_i2c_probe, .remove = mv64xxx_i2c_remove, + .driver = { + .owner = THIS_MODULE, + .name = MV64XXX_I2C_CTLR_NAME, + }, }; static int __init mv64xxx_i2c_init(void) { - return driver_register(&mv64xxx_i2c_driver); + return platform_driver_register(&mv64xxx_i2c_driver); } static void __exit mv64xxx_i2c_exit(void) { - driver_unregister(&mv64xxx_i2c_driver); + platform_driver_unregister(&mv64xxx_i2c_driver); } module_init(mv64xxx_i2c_init);