diff options
Diffstat (limited to 'src/soc/amd/stoneyridge/i2c.c')
-rw-r--r-- | src/soc/amd/stoneyridge/i2c.c | 78 |
1 files changed, 74 insertions, 4 deletions
diff --git a/src/soc/amd/stoneyridge/i2c.c b/src/soc/amd/stoneyridge/i2c.c index 7ce1c244ca..d3e01090ff 100644 --- a/src/soc/amd/stoneyridge/i2c.c +++ b/src/soc/amd/stoneyridge/i2c.c @@ -13,17 +13,87 @@ * GNU General Public License for more details. */ +#include <arch/acpi.h> +#include <arch/acpigen.h> +#include <console/console.h> #include <drivers/i2c/designware/dw_i2c.h> #include <soc/iomap.h> +#include "chip.h" + +#define I2C_BUS_ADDRESS(x) (I2C_BASE_ADDRESS + I2C_DEVICE_SIZE * (x)) +#define I2CA_BASE_ADDRESS (I2C_BUS_ADDRESS(0)) +#define I2CB_BASE_ADDRESS (I2C_BUS_ADDRESS(1)) +#define I2CC_BASE_ADDRESS (I2C_BUS_ADDRESS(2)) +#define I2CD_BASE_ADDRESS (I2C_BUS_ADDRESS(3)) + +/* Global to provide access to chip.c */ +const char *i2c_acpi_name(const struct device *dev); static const uintptr_t i2c_bus_address[] = { - I2C_BASE_ADDRESS + I2C_DEVICE_SIZE * 0, - I2C_BASE_ADDRESS + I2C_DEVICE_SIZE * 1, - I2C_BASE_ADDRESS + I2C_DEVICE_SIZE * 2, - I2C_BASE_ADDRESS + I2C_DEVICE_SIZE * 3, + I2CA_BASE_ADDRESS, + I2CB_BASE_ADDRESS, + I2CC_BASE_ADDRESS, + I2CD_BASE_ADDRESS, }; uintptr_t dw_i2c_base_address(unsigned int bus) { return bus < I2C_DEVICE_COUNT ? i2c_bus_address[bus] : 0; } + +const struct dw_i2c_bus_config *dw_i2c_get_soc_cfg(unsigned int bus, + const struct device *dev) +{ + const struct soc_amd_stoneyridge_config *config; + if (!dev || !dev->chip_info) { + printk(BIOS_ERR, "%s: Could not find SoC devicetree config!\n", + __func__); + return NULL; + } + if (bus >= ARRAY_SIZE(i2c_bus_address)) + return NULL; + + config = dev->chip_info; + return &config->i2c[bus]; +} + +const char *i2c_acpi_name(const struct device *dev) +{ + switch (dev->path.mmio.addr) { + case I2CA_BASE_ADDRESS: + return "I2CA"; + case I2CB_BASE_ADDRESS: + return "I2CB"; + case I2CC_BASE_ADDRESS: + return "I2CC"; + case I2CD_BASE_ADDRESS: + return "I2CD"; + default: + return NULL; + } +} + +int dw_i2c_soc_dev_to_bus(struct device *dev) +{ + switch (dev->path.mmio.addr) { + case I2CA_BASE_ADDRESS: + return 0; + case I2CB_BASE_ADDRESS: + return 1; + case I2CC_BASE_ADDRESS: + return 2; + case I2CD_BASE_ADDRESS: + return 3; + } + return -1; +} + +struct device_operations stoneyridge_i2c_mmio_ops = { + /* TODO(teravest): Move I2C resource info here. */ + .read_resources = DEVICE_NOOP, + .set_resources = DEVICE_NOOP, + .enable_resources = DEVICE_NOOP, + .scan_bus = scan_smbus, + .acpi_name = i2c_acpi_name, + .acpi_fill_ssdt_generator = dw_i2c_acpi_fill_ssdt, +}; |