diff options
| author | wdenk <wdenk> | 2003-07-15 07:45:49 +0000 |
|---|---|---|
| committer | wdenk <wdenk> | 2003-07-15 07:45:49 +0000 |
| commit | 6dff55297283ebe16096e25f2dadb54e4b6fd9fc (patch) | |
| tree | 6fa76fdf7ddc26e5728c3b318fe7addbf04ae673 /drivers/s3c24x0_i2c.c | |
| parent | 8564acf936726c5568d71e4fa93a0ae9814e0d07 (diff) | |
| download | olio-uboot-2014.01-6dff55297283ebe16096e25f2dadb54e4b6fd9fc.tar.xz olio-uboot-2014.01-6dff55297283ebe16096e25f2dadb54e4b6fd9fc.zip | |
* Patches by Martin Krause, 14 Jul 2003:
- add I2C support for s3c2400 systems (trab board)
- (re-) add "ping" to command table
* Fix handling of "slow" POST routines
Diffstat (limited to 'drivers/s3c24x0_i2c.c')
| -rw-r--r-- | drivers/s3c24x0_i2c.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/s3c24x0_i2c.c b/drivers/s3c24x0_i2c.c index 76b9d954f..4158b148c 100644 --- a/drivers/s3c24x0_i2c.c +++ b/drivers/s3c24x0_i2c.c @@ -63,7 +63,12 @@ static int GetI2CSDA(void) { S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO(); +#ifdef CONFIG_S3C2410 return (gpio->GPEDAT & 0x8000) >> 15; +#endif +#ifdef CONFIG_S3C2400 + return (gpio->PGDAT & 0x0020) >> 5; +#endif } #if 0 @@ -77,7 +82,12 @@ static void SetI2CSCL(int x) { S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO(); +#ifdef CONFIG_S3C2410 gpio->GPEDAT = (gpio->GPEDAT & ~0x4000) | (x&1) << 14; +#endif +#ifdef CONFIG_S3C2400 + gpio->PGDAT = (gpio->PGDAT & ~0x0040) | (x&1) << 6; +#endif } @@ -129,11 +139,22 @@ void i2c_init (int speed, int slaveadd) } if ((status & I2CSTAT_BSY) || GetI2CSDA() == 0) { +#ifdef CONFIG_S3C2410 ulong old_gpecon = gpio->GPECON; +#endif +#ifdef CONFIG_S3C2400 + ulong old_gpecon = gpio->PGCON; +#endif /* bus still busy probably by (most) previously interrupted transfer */ +#ifdef CONFIG_S3C2410 /* set I2CSDA and I2CSCL (GPE15, GPE14) to GPIO */ gpio->GPECON = (gpio->GPECON & ~0xF0000000) | 0x10000000; +#endif +#ifdef CONFIG_S3C2400 + /* set I2CSDA and I2CSCL (PG5, PG6) to GPIO */ + gpio->PGCON = (gpio->PGCON & ~0x00003c00) | 0x00000c00; +#endif /* toggle I2CSCL until bus idle */ SetI2CSCL(0); udelay(1000); @@ -146,7 +167,12 @@ void i2c_init (int speed, int slaveadd) SetI2CSCL(1); udelay(1000); /* restore pin functions */ +#ifdef CONFIG_S3C2410 gpio->GPECON = old_gpecon; +#endif +#ifdef CONFIG_S3C2400 + gpio->PGCON = old_gpecon; +#endif } /* calculate prescaler and divisor values */ |