1 #include "cs5535_smbus.h"
3 #define SMBUS_IO_BASE 0x6000
5 /* initialization for SMBus Controller */
6 static int cs5535_enable_smbus(void)
10 /* reset SMBUS controller */
11 outb(0, SMBUS_IO_BASE + SMB_CTRL2);
13 /* Set SCL freq and enable SMB controller */
14 val = inb(SMBUS_IO_BASE + SMB_CTRL2);
15 val |= ((0x20 << 1) | SMB_CTRL2_ENABLE);
16 outb(val, SMBUS_IO_BASE + SMB_CTRL2);
18 /* Setup SMBus host controller address to 0xEF */
19 val = inb(SMBUS_IO_BASE + SMB_ADD);
20 val |= (0xEF | SMB_ADD_SAEN);
21 outb(val, SMBUS_IO_BASE + SMB_ADD);
24 static int smbus_read_byte(unsigned device, unsigned address)
26 return do_smbus_read_byte(SMBUS_IO_BASE, device, address-1);
30 static int smbus_recv_byte(unsigned device)
32 return do_smbus_recv_byte(SMBUS_IO_BASE, device);
35 static int smbus_send_byte(unsigned device, unsigned char val)
37 return do_smbus_send_byte(SMBUS_IO_BASE, device, val);
41 static int smbus_write_byte(unsigned device, unsigned address, unsigned char val)
43 return do_smbus_write_byte(SMBUS_IO_BASE, device, address, val);