diff options
Diffstat (limited to 'src/southbridge/nvidia/ck804/smbus.h')
| -rw-r--r-- | src/southbridge/nvidia/ck804/smbus.h | 185 |
1 files changed, 0 insertions, 185 deletions
diff --git a/src/southbridge/nvidia/ck804/smbus.h b/src/southbridge/nvidia/ck804/smbus.h deleted file mode 100644 index 9aad5e14f0..0000000000 --- a/src/southbridge/nvidia/ck804/smbus.h +++ /dev/null @@ -1,185 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright (C) 2004 Tyan Computer - * Written by Yinghai Lu <yhlu@tyan.com> for Tyan Computer. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#include <arch/io.h> -#include <device/smbus_def.h> - -#define SMBHSTSTAT 0x1 -#define SMBHSTPRTCL 0x0 -#define SMBHSTCMD 0x3 -#define SMBXMITADD 0x2 -#define SMBHSTDAT0 0x4 -#define SMBHSTDAT1 0x5 - -/* - * Between 1-10 seconds, We should never timeout normally. - * Longer than this is just painful when a timeout condition occurs. - */ -#define SMBUS_TIMEOUT (100 * 1000 * 10) - -static inline void smbus_delay(void) -{ - outb(0x80, 0x80); -} - -static int smbus_wait_until_done(unsigned int smbus_io_base) -{ - unsigned long loops; - loops = SMBUS_TIMEOUT; - do { - unsigned char val; - smbus_delay(); - val = inb(smbus_io_base + SMBHSTSTAT); - if ((val & 0xff) != 0) - return 0; - } while (--loops); - return -3; -} - - -/* Platform has severe issues placing non-inlined functions in headers. */ -#if ENV_RAMSTAGE -static int do_smbus_recv_byte(unsigned int smbus_io_base, unsigned int device) -{ - unsigned char global_status_register, byte; - - /* Set the device I'm talking to. */ - outb(((device & 0x7f) << 1) | 1, smbus_io_base + SMBXMITADD); - smbus_delay(); - - /* Set the command/address. */ - outb(0, smbus_io_base + SMBHSTCMD); - smbus_delay(); - - /* Byte data recv. */ - outb(0x05, smbus_io_base + SMBHSTPRTCL); - smbus_delay(); - - /* Poll for transaction completion. */ - if (smbus_wait_until_done(smbus_io_base) < 0) - return -3; - - /* Lose check. */ - global_status_register = inb(smbus_io_base + SMBHSTSTAT) & 0x80; - - /* Read results of transaction. */ - byte = inb(smbus_io_base + SMBHSTDAT0); - - /* Lose check, otherwise it should be 0. */ - if (global_status_register != 0x80) - return -1; - - return byte; -} - -static int do_smbus_send_byte(unsigned int smbus_io_base, unsigned int device, - unsigned char val) -{ - unsigned int global_status_register; - - outb(val, smbus_io_base + SMBHSTDAT0); - smbus_delay(); - - /* Set the device I'm talking to. */ - outb(((device & 0x7f) << 1) | 0, smbus_io_base + SMBXMITADD); - smbus_delay(); - - outb(0, smbus_io_base + SMBHSTCMD); - smbus_delay(); - - /* Set up for a byte data write. */ - outb(0x04, smbus_io_base + SMBHSTPRTCL); - smbus_delay(); - - /* Poll for transaction completion. */ - if (smbus_wait_until_done(smbus_io_base) < 0) - return -3; - - /* Lose check. */ - global_status_register = inb(smbus_io_base + SMBHSTSTAT) & 0x80; - - if (global_status_register != 0x80) - return -1; - - return 0; -} -#endif /* ENV_RAMSTAGE */ - -static int do_smbus_read_byte(unsigned int smbus_io_base, unsigned int device, - unsigned int address) -{ - unsigned char global_status_register, byte; - - /* Set the device I'm talking to. */ - outb(((device & 0x7f) << 1) | 1, smbus_io_base + SMBXMITADD); - smbus_delay(); - - /* Set the command/address. */ - outb(address & 0xff, smbus_io_base + SMBHSTCMD); - smbus_delay(); - - /* Byte data read. */ - outb(0x07, smbus_io_base + SMBHSTPRTCL); - smbus_delay(); - - /* Poll for transaction completion. */ - if (smbus_wait_until_done(smbus_io_base) < 0) - return -3; - - /* Lose check. */ - global_status_register = inb(smbus_io_base + SMBHSTSTAT) & 0x80; - - /* Read results of transaction. */ - byte = inb(smbus_io_base + SMBHSTDAT0); - - /* Lose check, otherwise it should be 0. */ - if (global_status_register != 0x80) - return -1; - - return byte; -} - -static int do_smbus_write_byte(unsigned int smbus_io_base, unsigned int device, - unsigned int address, unsigned char val) -{ - unsigned int global_status_register; - - outb(val, smbus_io_base + SMBHSTDAT0); - smbus_delay(); - - /* Set the device I'm talking to. */ - outb(((device & 0x7f) << 1) | 0, smbus_io_base + SMBXMITADD); - smbus_delay(); - - outb(address & 0xff, smbus_io_base + SMBHSTCMD); - smbus_delay(); - - /* Set up for a byte data write. */ - outb(0x06, smbus_io_base + SMBHSTPRTCL); - smbus_delay(); - - /* Poll for transaction completion. */ - if (smbus_wait_until_done(smbus_io_base) < 0) - return -3; - - /* Lose check. */ - global_status_register = inb(smbus_io_base + SMBHSTSTAT) & 0x80; - - if (global_status_register != 0x80) - return -1; - - return 0; -} |