| #include <console/console.h> |
| #include <stdint.h> |
| #include <device/device.h> |
| #include <device/path.h> |
| #include <device/smbus.h> |
| |
| struct bus *get_pbus_smbus(device_t dev) |
| { |
| struct bus *pbus = dev->bus; |
| while (pbus && pbus->dev && !ops_smbus_bus(pbus)) { |
| pbus = pbus->dev->bus; |
| } |
| if (!pbus || !pbus->dev || !pbus->dev->ops || !pbus->dev->ops->ops_smbus_bus) { |
| printk_alert("%s Cannot find smbus bus operations", dev_path(dev)); |
| die(""); |
| for(;;); |
| } |
| return pbus; |
| } |
| |
| /*multi level i2c MUX??? may need to find the first i2c device and then set link |
| * down to current dev |
| 1 store get_pbus_smbus list link |
| 2 reverse the link and call set link */ |
| |
| int smbus_set_link(device_t dev) |
| { |
| struct bus *pbus_a[4]; // 4 level mux only. Enough? |
| struct bus *pbus = dev->bus; |
| int pbus_num=0; |
| int i; |
| while(pbus && pbus->dev && (pbus->dev->path.type==DEVICE_PATH_I2C)) { |
| pbus_a[pbus_num++] = pbus; |
| pbus = pbus->dev->bus; |
| } |
| // printk_info("smbus_set_link: "); |
| for (i=pbus_num-1; i>=0; i--) { |
| // printk_info(" %s[%d] -> ", dev_path(pbus_a[i]->dev), pbus_a[i]->link); |
| if (ops_smbus_bus(get_pbus_smbus(pbus_a[i]->dev))) { |
| if (pbus_a[i]->dev->ops && pbus_a[i]->dev->ops->set_link) |
| pbus_a[i]->dev->ops->set_link(pbus_a[i]->dev, pbus_a[i]->link); |
| } |
| } |
| // printk_info(" %s\n", dev_path(dev)); |
| |
| return pbus_num; |
| } |
| |
| int smbus_quick_read(device_t dev) |
| { |
| return ops_smbus_bus(get_pbus_smbus(dev))->quick_read(dev); |
| } |
| int smbus_quick_write(device_t dev) |
| { |
| return ops_smbus_bus(get_pbus_smbus(dev))->quick_write(dev); |
| } |
| int smbus_recv_byte(device_t dev) |
| { |
| return ops_smbus_bus(get_pbus_smbus(dev))->recv_byte(dev); |
| } |
| int smbus_send_byte(device_t dev, uint8_t byte) |
| { |
| return ops_smbus_bus(get_pbus_smbus(dev))->send_byte(dev, byte); |
| } |
| int smbus_read_byte(device_t dev, uint8_t addr) |
| { |
| return ops_smbus_bus(get_pbus_smbus(dev))->read_byte(dev, addr); |
| } |
| int smbus_write_byte(device_t dev, uint8_t addr, uint8_t val) |
| { |
| return ops_smbus_bus(get_pbus_smbus(dev))->write_byte(dev, addr, val); |
| } |
| int smbus_read_word(device_t dev, uint8_t addr) |
| { |
| return ops_smbus_bus(get_pbus_smbus(dev))->read_word(dev, addr); |
| } |
| int smbus_write_word(device_t dev, uint8_t addr, uint16_t val) |
| { |
| return ops_smbus_bus(get_pbus_smbus(dev))->write_word(dev, addr, val); |
| } |
| int smbus_process_call(device_t dev, uint8_t cmd, uint16_t data) |
| { |
| return ops_smbus_bus(get_pbus_smbus(dev))->process_call(dev, cmd, data); |
| } |
| int smbus_block_read(device_t dev, uint8_t cmd, uint8_t bytes, uint8_t *buffer) |
| { |
| return ops_smbus_bus(get_pbus_smbus(dev))->block_read(dev, cmd, bytes, buffer); |
| } |
| int smbus_block_write(device_t dev, uint8_t cmd, uint8_t bytes, const uint8_t *buffer) |
| { |
| return ops_smbus_bus(get_pbus_smbus(dev))->block_write(dev, cmd, bytes, buffer); |
| } |
| |
| |