soc/amd: unify SMBus support

The SMBus support is identical between stoneyridge and picasso.
Unify on common support code.

Change-Id: Ic3412c5ee67977a45c50b68f36acc45c3d560db5
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38616
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>

1 files changed, 0 insertions, 196 deletions

diff --git a/src/soc/amd/stoneyridge/smbus.c b/src/soc/amd/stoneyridge/smbus.c
deleted file mode 100644
index 5474c5cd45..0000000000
--- a/src/soc/amd/stoneyridge/smbus.c
+++ /dev/null
@@ -1,196 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2010 Advanced Micro Devices, Inc.
- *
- * 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 <stdint.h>
-#include <console/console.h>
-#include <device/smbus_host.h>
-#include <amdblocks/acpimmio.h>
-#include <soc/southbridge.h>
-
-/*
- * 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 u8 controller_read8(uintptr_t base, u8 reg)
-{
-	switch (base) {
-	case ACPIMMIO_SMBUS_BASE:
-		return smbus_read8(reg);
-	case ACPIMMIO_ASF_BASE:
-		return asf_read8(reg);
-	default:
-		printk(BIOS_ERR, "Error attempting to read SMBus at address 0x%lx\n",
-				base);
-	}
-	return 0xff;
-}
-
-static void controller_write8(uintptr_t base, u8 reg, u8 val)
-{
-	switch (base) {
-	case ACPIMMIO_SMBUS_BASE:
-		smbus_write8(reg, val);
-		break;
-	case ACPIMMIO_ASF_BASE:
-		asf_write8(reg, val);
-		break;
-	default:
-		printk(BIOS_ERR, "Error attempting to write SMBus at address 0x%lx\n",
-				base);
-	}
-}
-
-static int smbus_wait_until_ready(uintptr_t mmio)
-{
-	u32 loops;
-	loops = SMBUS_TIMEOUT;
-	do {
-		u8 val;
-		val = controller_read8(mmio, SMBHSTSTAT);
-		val &= SMBHST_STAT_VAL_BITS;
-		if (val == 0) {	/* ready now */
-			return 0;
-		}
-		controller_write8(mmio, SMBHSTSTAT, val);
-	} while (--loops);
-	return -2;		/* time out */
-}
-
-static int smbus_wait_until_done(uintptr_t mmio)
-{
-	u32 loops;
-	loops = SMBUS_TIMEOUT;
-	do {
-		u8 val;
-
-		val = controller_read8(mmio, SMBHSTSTAT);
-		val &= SMBHST_STAT_VAL_BITS;	/* mask off reserved bits */
-		if (val & SMBHST_STAT_ERROR_BITS)
-			return -5;	/* error */
-		if (val == SMBHST_STAT_NOERROR) {
-			controller_write8(mmio, SMBHSTSTAT, val); /* clr sts */
-			return 0;
-		}
-	} while (--loops);
-	return -3;		/* timeout */
-}
-
-int do_smbus_recv_byte(uintptr_t mmio, u8 device)
-{
-	u8 byte;
-
-	if (smbus_wait_until_ready(mmio) < 0)
-		return -2;	/* not ready */
-
-	/* set the device I'm talking to */
-	controller_write8(mmio, SMBHSTADDR, ((device & 0x7f) << 1) | 1);
-
-	byte = controller_read8(mmio, SMBHSTCTRL);
-	byte &= ~SMBHST_CTRL_MODE_BITS;			/* Clear [4:2] */
-	byte |= SMBHST_CTRL_STRT | SMBHST_CTRL_BTE_RW;	/* set mode, start */
-	controller_write8(mmio, SMBHSTCTRL, byte);
-
-	/* poll for transaction completion */
-	if (smbus_wait_until_done(mmio) < 0)
-		return -3;	/* timeout or error */
-
-	/* read results of transaction */
-	byte = controller_read8(mmio, SMBHSTDAT0);
-
-	return byte;
-}
-
-int do_smbus_send_byte(uintptr_t mmio, u8 device, u8 val)
-{
-	u8 byte;
-
-	if (smbus_wait_until_ready(mmio) < 0)
-		return -2;	/* not ready */
-
-	/* set the command... */
-	controller_write8(mmio, SMBHSTDAT0, val);
-
-	/* set the device I'm talking to */
-	controller_write8(mmio, SMBHSTADDR, ((device & 0x7f) << 1) | 0);
-
-	byte = controller_read8(mmio, SMBHSTCTRL);
-	byte &= ~SMBHST_CTRL_MODE_BITS;			/* Clear [4:2] */
-	byte |= SMBHST_CTRL_STRT | SMBHST_CTRL_BTE_RW;	/* set mode, start */
-	controller_write8(mmio, SMBHSTCTRL, byte);
-
-	/* poll for transaction completion */
-	if (smbus_wait_until_done(mmio) < 0)
-		return -3;	/* timeout or error */
-
-	return 0;
-}
-
-int do_smbus_read_byte(uintptr_t mmio, u8 device, u8 address)
-{
-	u8 byte;
-
-	if (smbus_wait_until_ready(mmio) < 0)
-		return -2;	/* not ready */
-
-	/* set the command/address... */
-	controller_write8(mmio, SMBHSTCMD, address & 0xff);
-
-	/* set the device I'm talking to */
-	controller_write8(mmio, SMBHSTADDR, ((device & 0x7f) << 1) | 1);
-
-	byte = controller_read8(mmio, SMBHSTCTRL);
-	byte &= ~SMBHST_CTRL_MODE_BITS;			/* Clear [4:2] */
-	byte |= SMBHST_CTRL_STRT | SMBHST_CTRL_BDT_RW;	/* set mode, start */
-	controller_write8(mmio, SMBHSTCTRL, byte);
-
-	/* poll for transaction completion */
-	if (smbus_wait_until_done(mmio) < 0)
-		return -3;	/* timeout or error */
-
-	/* read results of transaction */
-	byte = controller_read8(mmio, SMBHSTDAT0);
-
-	return byte;
-}
-
-int do_smbus_write_byte(uintptr_t mmio, u8 device, u8 address, u8 val)
-{
-	u8 byte;
-
-	if (smbus_wait_until_ready(mmio) < 0)
-		return -2;	/* not ready */
-
-	/* set the command/address... */
-	controller_write8(mmio, SMBHSTCMD, address & 0xff);
-
-	/* set the device I'm talking to */
-	controller_write8(mmio, SMBHSTADDR, ((device & 0x7f) << 1) | 0);
-
-	/* output value */
-	controller_write8(mmio, SMBHSTDAT0, val);
-
-	byte = controller_read8(mmio, SMBHSTCTRL);
-	byte &= ~SMBHST_CTRL_MODE_BITS;			/* Clear [4:2] */
-	byte |= SMBHST_CTRL_STRT | SMBHST_CTRL_BDT_RW;	/* set mode, start */
-	controller_write8(mmio, SMBHSTCTRL, byte);
-
-	/* poll for transaction completion */
-	if (smbus_wait_until_done(mmio) < 0)
-		return -3;	/* timeout or error */
-
-	return 0;
-}