• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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