| #include "atmel_start_pins.h" |
| #include "i2c_bitbang.h" |
| |
| /* FIXME: This somehow ends up with measured 125 kHz SCL speed ?!? We should probably |
| * switch away from using delay_us() and instead use some hardware timer? */ |
| #define I2C_DELAY_US 1 |
| |
| #ifndef SDA1 |
| /* We should define those pins in Atmel START. Until they are, define them here */ |
| #define SDA1 GPIO(GPIO_PORTB, 15) |
| #define SCL1 GPIO(GPIO_PORTB, 14) |
| #define SDA2 GPIO(GPIO_PORTB, 3) |
| #define SCL2 GPIO(GPIO_PORTB, 2) |
| #define SDA3 GPIO(GPIO_PORTB, 7) |
| #define SCL3 GPIO(GPIO_PORTB, 6) |
| #define SDA4 GPIO(GPIO_PORTC, 28) |
| #define SCL4 GPIO(GPIO_PORTC, 27) |
| #endif |
| |
| /* Unfortunately the schematics count I2C busses from '1', not from '0' :( |
| * In software, we [obviously] count from '0' upwards. */ |
| const struct i2c_adapter i2c[4] = { |
| [0] = { |
| .pin_sda = SDA1, |
| .pin_scl = SCL1, |
| .udelay = I2C_DELAY_US, |
| }, |
| [1] = { |
| .pin_sda = SDA2, |
| .pin_scl = SCL2, |
| .udelay = I2C_DELAY_US, |
| }, |
| [2] = { |
| .pin_sda = SDA3, |
| .pin_scl = SCL3, |
| .udelay = I2C_DELAY_US, |
| }, |
| [3] = { |
| .pin_sda = SDA4, |
| .pin_scl = SCL4, |
| .udelay = I2C_DELAY_US, |
| } |
| }; |