1 /* SPDX-License-Identifier: GPL-2.0-only */
2
3 #define __SIMPLE_DEVICE__
4
5 #include <soc/iomap.h>
6 #include <soc/pci_devs.h>
7 #include <device/pci_def.h>
8 #include <device/pci_type.h>
9 #include <device/pci_ops.h>
10 #include <device/smbus_host.h>
11 #include <soc/smbus.h>
12
smbus_i2c_block_write(u8 addr,u8 bytes,u8 * buf)13 int smbus_i2c_block_write(u8 addr, u8 bytes, u8 *buf)
14 {
15 const pci_devfn_t dev = PCI_DEV(0, SMBUS_DEV, SMBUS_FUNC);
16
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 }
35