| Angel Pons | ba38f37 | 2020-04-05 15:46:45 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| Michał Żygowski | 1119428 | 2019-03-27 10:39:55 +0100 | [diff] [blame] | 2 | |
| Angel Pons | fc8e997 | 2021-04-17 12:12:52 +0200 | [diff] [blame] | 3 | #define __SIMPLE_DEVICE__ |
| 4 | |
| Michał Żygowski | 1119428 | 2019-03-27 10:39:55 +0100 | [diff] [blame] | 5 | #include <soc/iomap.h> |
| Frans Hendriks | 863853c | 2019-06-18 12:18:55 +0200 | [diff] [blame] | 6 | #include <soc/pci_devs.h> |
| 7 | #include <device/pci_def.h> |
| 8 | #include <device/pci_type.h> |
| 9 | #include <device/pci_ops.h> |
| Kyösti Mälkki | 1cae454 | 2020-01-06 12:31:34 +0200 | [diff] [blame] | 10 | #include <device/smbus_host.h> |
| Frans Hendriks | 863853c | 2019-06-18 12:18:55 +0200 | [diff] [blame] | 11 | #include <soc/smbus.h> |
| Michał Żygowski | 1119428 | 2019-03-27 10:39:55 +0100 | [diff] [blame] | 12 | |
| Frans Hendriks | 863853c | 2019-06-18 12:18:55 +0200 | [diff] [blame] | 13 | int smbus_i2c_block_write(u8 addr, u8 bytes, u8 *buf) |
| 14 | { |
| Angel Pons | fc8e997 | 2021-04-17 12:12:52 +0200 | [diff] [blame] | 15 | const pci_devfn_t dev = PCI_DEV(0, SMBUS_DEV, SMBUS_FUNC); |
| 16 | |
| Frans Hendriks | 863853c | 2019-06-18 12:18:55 +0200 | [diff] [blame] | 17 | u32 smbase; |
| 18 | u32 smb_ctrl_reg; |
| 19 | int status; |
| 20 | |
| 21 | /* SMBus I/O BAR */ |
| 22 | smbase = pci_read_config32(dev, PCI_BASE_ADDRESS_4) & 0xFFFFFFFE; |
| 23 | |
| 24 | /* Enable I2C_EN bit in HOSTC register */ |
| 25 | smb_ctrl_reg = pci_read_config32(dev, HOSTC); |
| 26 | pci_write_config32(dev, HOSTC, smb_ctrl_reg | HOSTC_I2C_EN); |
| 27 | |
| 28 | status = do_i2c_block_write(smbase, addr, bytes, buf); |
| 29 | |
| 30 | /* Restore I2C_EN bit */ |
| 31 | pci_write_config32(dev, HOSTC, smb_ctrl_reg); |
| 32 | |
| 33 | return status; |
| 34 | } |