| #include "i440bx_smbus.h" |
| |
| #define SMBUS_IO_BASE 0x0f00 |
| |
| static void enable_smbus(void) |
| { |
| device_t dev; |
| dev = pci_locate_device(PCI_ID(0x8086, 0x7113), 0); |
| if (dev == PCI_DEV_INVALID) { |
| die("SMBUS controller not found\r\n"); |
| } |
| uint8_t enable; |
| print_spew("SMBus controller enabled\r\n"); |
| pci_write_config32(dev, 0x90, SMBUS_IO_BASE | 1 ); |
| // Enable and set SMBBus |
| // 0x01 Interrupt to SMI# |
| // (0x4<<1)|1 set interrupt to IRQ9 |
| pci_write_config8(dev, 0xd2, (0x4<<1)|1); |
| |
| // Enable the IO space |
| pci_write_config16(dev, 0x04, 1); |
| |
| /* clear any lingering errors, so the transaction will run */ |
| outb(0x1e, SMBUS_IO_BASE + SMBHST_STATUS); |
| } |
| |
| |
| |
| static int smbus_read_byte(unsigned device, unsigned address) |
| { |
| return do_smbus_read_byte(SMBUS_IO_BASE, device, address); |
| } |
| |
| |
| // The following functions are broken. Do no use until you |
| // have fixed the low level code to do the right thing. |
| // |
| #if 0 |
| static int smbus_write_byte(unsigned device, unsigned address, unsigned char val) |
| { |
| return do_smbus_write_byte(SMBUS_IO_BASE, device, address, val); |
| } |
| |
| 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); |
| } |
| #endif |