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#include "cs5535_smbus.h"
#define SMBUS_IO_BASE 0x6000
/* initialization for SMBus Controller */
static int enable_smbus(void)
{
unsigned char val;
/* FixME: move to early_iobase.c */
/* setup LBAR for SMBus controller */
__builtin_wrmsr(0x5140000B, 0x00006000, 0x0000f001);
/* setup LBAR for GPIO at 0x6100 */
__builtin_wrmsr(0x5140000C, 0x00006100, 0x0000f001);
/* setup GPIO pins for SDA/SCL */
/* Setup SMBus host controller address to 0xEF */
val = inb(SMBUS_IO_BASE + SMB_ADD);
val |= (0xEF | SMB_ADD_SAEN);
outb(val, SMBUS_IO_BASE + SMB_ADD);
/* Set SCL freq and enable SMB controller */
outb(0x00, SMBUS_IO_BASE + SMB_CTRL2);
val = inb(SMBUS_IO_BASE + SMB_CTRL2);
val |= (0x7F < 1) | SMB_CTRL2_ENABLE;
outb(val, SMBUS_IO_BASE + SMB_CTRL2);
/* Is SDA pulled high ? */
val = inb(SMBUS_IO_BASE + SMB_CTRL_STS);
if (val & SMB_CSTS_TSDA)
return SMBUS_ERROR;
}
#if 0
static int smbus_recv_byte(unsigned device)
{
return do_smbus_recv_byte(SMBUS_IO_BASE, device);
}
static int smbus_send_byte(unsigned device, unsigned char val)
{
return do_smbus_send_byte(SMBUS_IO_BASE, device, val);
}
static int smbus_read_byte(unsigned device, unsigned address)
{
return do_smbus_read_byte(SMBUS_IO_BASE, device, address);
}
static int smbus_write_byte(unsigned device, unsigned address, unsigned char val)
{
return do_smbus_write_byte(SMBUS_IO_BASE, device, address, val);
}
#endif
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