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coreboot-kgpe-d16/src/southbridge/intel/common/smbus.c

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sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2005 Yinghai Lu <yinghailu@gmail.com>
* Copyright (C) 2009 coresystems GmbH
* Copyright (C) 2013 Vladimir Serbinenko
*
* 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>
sb/intel/common: Add HAVE_DEBUG_SMBUS Change-Id: Ifb1a1eff71968f31af9004ff00717f202d3ec29e Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/21117 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2017-08-20 20:36:08 +02:00
#include <console/console.h>
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
#include <device/smbus_def.h>
sb/intel/common: Fix SMBus block commands Clear LAST_BYTE flag at beginning of block commands. For reads, slave device determines in the message format how many bytes it has to transfer out, host firmware only dictates the maximum buffer length. Return SMBUS_ERROR if only partial message was received. For writes, return SMBUS_ERROR if length > 32. For writes, fix off-by-one error reading memory one byte past the buffer end. Change-Id: If9e5d24255a0a03039b52d2863bc278d0eefc311 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/20879 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2017-08-04 14:28:50 +02:00
#include <stdlib.h>
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
#include "smbus.h"
sb/intel/common: Add HAVE_DEBUG_SMBUS Change-Id: Ifb1a1eff71968f31af9004ff00717f202d3ec29e Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/21117 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2017-08-20 20:36:08 +02:00
#if IS_ENABLED(CONFIG_DEBUG_SMBUS)
#define dprintk(args...) printk(BIOS_DEBUG, ##args)
#else
#define dprintk(args...) do {} while (0)
#endif
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
/* I801 command constants */
#define I801_QUICK (0 << 2)
#define I801_BYTE (1 << 2)
#define I801_BYTE_DATA (2 << 2)
#define I801_WORD_DATA (3 << 2)
#define I801_BLOCK_DATA (5 << 2)
#define I801_I2C_BLOCK_DATA (6 << 2) /* ICH5 and later */
/* I801 Host Control register bits */
#define SMBHSTCNT_INTREN (1 << 0)
#define SMBHSTCNT_KILL (1 << 1)
#define SMBHSTCNT_LAST_BYTE (1 << 5)
#define SMBHSTCNT_START (1 << 6)
#define SMBHSTCNT_PEC_EN (1 << 7) /* ICH3 and later */
/* I801 Hosts Status register bits */
#define SMBHSTSTS_BYTE_DONE (1 << 7)
#define SMBHSTSTS_INUSE_STS (1 << 6)
#define SMBHSTSTS_SMBALERT_STS (1 << 5)
#define SMBHSTSTS_FAILED (1 << 4)
#define SMBHSTSTS_BUS_ERR (1 << 3)
#define SMBHSTSTS_DEV_ERR (1 << 2)
#define SMBHSTSTS_INTR (1 << 1)
#define SMBHSTSTS_HOST_BUSY (1 << 0)
sb/intel/common: SMBus setup_command() Implements the common parts of any SMBus transaction with a stub to log and recover (TBD) from timeout errors. Bits in SMBHSTCTL register are no longer preserved between transactions. Change-Id: I7ce14d3e895c30d595a94ce29ce0dc8cf51eb453 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21118 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:11 +02:00
/* For SMBXMITADD register. */
#define XMIT_WRITE(dev) (((dev) << 1) | 0)
#define XMIT_READ(dev) (((dev) << 1) | 1)
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
#define SMBUS_TIMEOUT (10 * 1000 * 100)
src: Get rid of unneeded whitespace Change-Id: I630d49ab504d9f6e052806b516a600fa41b9a8da Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/26991 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2018-06-09 11:59:00 +02:00
#define SMBUS_BLOCK_MAXLEN 32
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
static void smbus_delay(void)
{
inb(0x80);
}
sb/intel/common: SMBus complete_command() Adds helper to test for SMBHSTSTAT flags for hardware having finished or failed a transaction. Change-Id: Idea15e03edde7aeedf198c1529f09c24a5bc0b06 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21120 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:18 +02:00
static int host_completed(u8 status)
{
if (status & SMBHSTSTS_HOST_BUSY)
return 0;
status &= ~(SMBHSTSTS_SMBALERT_STS | SMBHSTSTS_INUSE_STS);
return status != 0;
}
sb/intel/common: SMBus setup_command() Implements the common parts of any SMBus transaction with a stub to log and recover (TBD) from timeout errors. Bits in SMBHSTCTL register are no longer preserved between transactions. Change-Id: I7ce14d3e895c30d595a94ce29ce0dc8cf51eb453 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21118 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:11 +02:00
static int recover_master(int smbus_base, int ret)
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
{
sb/intel/common: SMBus setup_command() Implements the common parts of any SMBus transaction with a stub to log and recover (TBD) from timeout errors. Bits in SMBHSTCTL register are no longer preserved between transactions. Change-Id: I7ce14d3e895c30d595a94ce29ce0dc8cf51eb453 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21118 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:11 +02:00
/* TODO: Depending of the failure, drive KILL transaction
* or force soft reset on SMBus master controller.
*/
printk(BIOS_ERR, "SMBus: Fatal master timeout (%d)\n", ret);
return ret;
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
}
sb/intel/common: SMBus complete_command() Adds helper to test for SMBHSTSTAT flags for hardware having finished or failed a transaction. Change-Id: Idea15e03edde7aeedf198c1529f09c24a5bc0b06 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21120 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:18 +02:00
static int cb_err_from_stat(u8 status)
{
/* Ignore the "In Use" status... */
status &= ~(SMBHSTSTS_SMBALERT_STS | SMBHSTSTS_INUSE_STS);
if (status == SMBHSTSTS_INTR)
return 0;
return SMBUS_ERROR;
}
sb/intel/common: SMBus setup_command() Implements the common parts of any SMBus transaction with a stub to log and recover (TBD) from timeout errors. Bits in SMBHSTCTL register are no longer preserved between transactions. Change-Id: I7ce14d3e895c30d595a94ce29ce0dc8cf51eb453 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21118 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:11 +02:00
static int setup_command(unsigned int smbus_base, u8 ctrl, u8 xmitadd)
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
{
unsigned int loops = SMBUS_TIMEOUT;
sb/intel/common: SMBus setup_command() Implements the common parts of any SMBus transaction with a stub to log and recover (TBD) from timeout errors. Bits in SMBHSTCTL register are no longer preserved between transactions. Change-Id: I7ce14d3e895c30d595a94ce29ce0dc8cf51eb453 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21118 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:11 +02:00
u8 host_busy;
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
do {
smbus_delay();
sb/intel/common: SMBus setup_command() Implements the common parts of any SMBus transaction with a stub to log and recover (TBD) from timeout errors. Bits in SMBHSTCTL register are no longer preserved between transactions. Change-Id: I7ce14d3e895c30d595a94ce29ce0dc8cf51eb453 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21118 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:11 +02:00
host_busy = inb(smbus_base + SMBHSTSTAT) & SMBHSTSTS_HOST_BUSY;
} while (--loops && host_busy);
if (loops == 0)
return recover_master(smbus_base,
SMBUS_WAIT_UNTIL_READY_TIMEOUT);
/* Clear any lingering errors, so the transaction will run. */
outb(inb(smbus_base + SMBHSTSTAT), smbus_base + SMBHSTSTAT);
/* Set up transaction */
/* Disable interrupts */
outb(ctrl, (smbus_base + SMBHSTCTL));
/* Set the device I'm talking to. */
outb(xmitadd, smbus_base + SMBXMITADD);
return 0;
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
}
sb/intel/common: SMBus execute_command() Implement the common start of transaction. Fixes a problem where smbus_wait_until_active() can miss SMBHSTSTS_HOST_BUSY being set, if transaction completes very fast. Or if we are single-stepping or executing under SerialIce emulation. Change-Id: Icb27d7d6a1c54968950ca292dbae05415f97e461 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21119 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:15 +02:00
static int execute_command(unsigned int smbus_base)
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
{
sb/intel/common: SMBus execute_command() Implement the common start of transaction. Fixes a problem where smbus_wait_until_active() can miss SMBHSTSTS_HOST_BUSY being set, if transaction completes very fast. Or if we are single-stepping or executing under SerialIce emulation. Change-Id: Icb27d7d6a1c54968950ca292dbae05415f97e461 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21119 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:15 +02:00
unsigned int loops = SMBUS_TIMEOUT;
u8 status;
/* Start the command. */
outb((inb(smbus_base + SMBHSTCTL) | SMBHSTCNT_START),
smbus_base + SMBHSTCTL);
/* Poll for it to start. */
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
do {
smbus_delay();
sb/intel/common: SMBus execute_command() Implement the common start of transaction. Fixes a problem where smbus_wait_until_active() can miss SMBHSTSTS_HOST_BUSY being set, if transaction completes very fast. Or if we are single-stepping or executing under SerialIce emulation. Change-Id: Icb27d7d6a1c54968950ca292dbae05415f97e461 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21119 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:15 +02:00
/* If we poll too slow, we could miss HOST_BUSY flag
* set and detect INTR or x_ERR flags instead here.
*/
status = inb(smbus_base + SMBHSTSTAT);
status &= ~(SMBHSTSTS_SMBALERT_STS | SMBHSTSTS_INUSE_STS);
} while (--loops && status == 0);
if (loops == 0)
return recover_master(smbus_base,
SMBUS_WAIT_UNTIL_ACTIVE_TIMEOUT);
return 0;
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
}
sb/intel/common: SMBus complete_command() Adds helper to test for SMBHSTSTAT flags for hardware having finished or failed a transaction. Change-Id: Idea15e03edde7aeedf198c1529f09c24a5bc0b06 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21120 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:18 +02:00
static int complete_command(unsigned int smbus_base)
sb/intel/common: SMBus setup_command() Implements the common parts of any SMBus transaction with a stub to log and recover (TBD) from timeout errors. Bits in SMBHSTCTL register are no longer preserved between transactions. Change-Id: I7ce14d3e895c30d595a94ce29ce0dc8cf51eb453 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21118 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:11 +02:00
{
unsigned int loops = SMBUS_TIMEOUT;
sb/intel/common: SMBus complete_command() Adds helper to test for SMBHSTSTAT flags for hardware having finished or failed a transaction. Change-Id: Idea15e03edde7aeedf198c1529f09c24a5bc0b06 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21120 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:18 +02:00
u8 status;
sb/intel/common: SMBus setup_command() Implements the common parts of any SMBus transaction with a stub to log and recover (TBD) from timeout errors. Bits in SMBHSTCTL register are no longer preserved between transactions. Change-Id: I7ce14d3e895c30d595a94ce29ce0dc8cf51eb453 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21118 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:11 +02:00
do {
smbus_delay();
sb/intel/common: SMBus complete_command() Adds helper to test for SMBHSTSTAT flags for hardware having finished or failed a transaction. Change-Id: Idea15e03edde7aeedf198c1529f09c24a5bc0b06 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21120 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:18 +02:00
status = inb(smbus_base + SMBHSTSTAT);
} while (--loops && !host_completed(status));
if (loops == 0)
return recover_master(smbus_base,
SMBUS_WAIT_UNTIL_DONE_TIMEOUT);
return cb_err_from_stat(status);
sb/intel/common: SMBus setup_command() Implements the common parts of any SMBus transaction with a stub to log and recover (TBD) from timeout errors. Bits in SMBHSTCTL register are no longer preserved between transactions. Change-Id: I7ce14d3e895c30d595a94ce29ce0dc8cf51eb453 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21118 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:11 +02:00
}
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
int do_smbus_read_byte(unsigned int smbus_base, u8 device,
unsigned int address)
{
sb/intel/common: SMBus setup_command() Implements the common parts of any SMBus transaction with a stub to log and recover (TBD) from timeout errors. Bits in SMBHSTCTL register are no longer preserved between transactions. Change-Id: I7ce14d3e895c30d595a94ce29ce0dc8cf51eb453 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21118 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:11 +02:00
int ret;
sb/intel/common: SMBus complete_command() Adds helper to test for SMBHSTSTAT flags for hardware having finished or failed a transaction. Change-Id: Idea15e03edde7aeedf198c1529f09c24a5bc0b06 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21120 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:18 +02:00
u8 byte;
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
sb/intel/common: SMBus setup_command() Implements the common parts of any SMBus transaction with a stub to log and recover (TBD) from timeout errors. Bits in SMBHSTCTL register are no longer preserved between transactions. Change-Id: I7ce14d3e895c30d595a94ce29ce0dc8cf51eb453 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21118 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:11 +02:00
/* Set up for a byte data read. */
ret = setup_command(smbus_base, I801_BYTE_DATA, XMIT_READ(device));
if (ret < 0)
return ret;
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
/* Set the command/address... */
sb/intel/common: SMBus setup_command() Implements the common parts of any SMBus transaction with a stub to log and recover (TBD) from timeout errors. Bits in SMBHSTCTL register are no longer preserved between transactions. Change-Id: I7ce14d3e895c30d595a94ce29ce0dc8cf51eb453 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21118 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:11 +02:00
outb(address, smbus_base + SMBHSTCMD);
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
/* Clear the data byte... */
outb(0, smbus_base + SMBHSTDAT0);
/* Start the command */
sb/intel/common: SMBus execute_command() Implement the common start of transaction. Fixes a problem where smbus_wait_until_active() can miss SMBHSTSTS_HOST_BUSY being set, if transaction completes very fast. Or if we are single-stepping or executing under SerialIce emulation. Change-Id: Icb27d7d6a1c54968950ca292dbae05415f97e461 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21119 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:15 +02:00
ret = execute_command(smbus_base);
if (ret < 0)
return ret;
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
/* Poll for transaction completion */
sb/intel/common: SMBus complete_command() Adds helper to test for SMBHSTSTAT flags for hardware having finished or failed a transaction. Change-Id: Idea15e03edde7aeedf198c1529f09c24a5bc0b06 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21120 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:18 +02:00
ret = complete_command(smbus_base);
if (ret < 0)
return ret;
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
/* Read results of transaction */
byte = inb(smbus_base + SMBHSTDAT0);
return byte;
}
int do_smbus_write_byte(unsigned int smbus_base, u8 device,
unsigned int address, unsigned int data)
{
sb/intel/common: SMBus setup_command() Implements the common parts of any SMBus transaction with a stub to log and recover (TBD) from timeout errors. Bits in SMBHSTCTL register are no longer preserved between transactions. Change-Id: I7ce14d3e895c30d595a94ce29ce0dc8cf51eb453 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21118 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:11 +02:00
int ret;
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
sb/intel/common: SMBus setup_command() Implements the common parts of any SMBus transaction with a stub to log and recover (TBD) from timeout errors. Bits in SMBHSTCTL register are no longer preserved between transactions. Change-Id: I7ce14d3e895c30d595a94ce29ce0dc8cf51eb453 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21118 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:11 +02:00
/* Set up for a byte data write. */
ret = setup_command(smbus_base, I801_BYTE_DATA, XMIT_WRITE(device));
if (ret < 0)
return ret;
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
/* Set the command/address... */
sb/intel/common: SMBus setup_command() Implements the common parts of any SMBus transaction with a stub to log and recover (TBD) from timeout errors. Bits in SMBHSTCTL register are no longer preserved between transactions. Change-Id: I7ce14d3e895c30d595a94ce29ce0dc8cf51eb453 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21118 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:11 +02:00
outb(address, smbus_base + SMBHSTCMD);
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
sb/intel/common: SMBus setup_command() Implements the common parts of any SMBus transaction with a stub to log and recover (TBD) from timeout errors. Bits in SMBHSTCTL register are no longer preserved between transactions. Change-Id: I7ce14d3e895c30d595a94ce29ce0dc8cf51eb453 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21118 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:11 +02:00
/* Set the data byte... */
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
outb(data, smbus_base + SMBHSTDAT0);
/* Start the command */
sb/intel/common: SMBus execute_command() Implement the common start of transaction. Fixes a problem where smbus_wait_until_active() can miss SMBHSTSTS_HOST_BUSY being set, if transaction completes very fast. Or if we are single-stepping or executing under SerialIce emulation. Change-Id: Icb27d7d6a1c54968950ca292dbae05415f97e461 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21119 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:15 +02:00
ret = execute_command(smbus_base);
if (ret < 0)
return ret;
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
/* Poll for transaction completion */
sb/intel/common: SMBus complete_command() Adds helper to test for SMBHSTSTAT flags for hardware having finished or failed a transaction. Change-Id: Idea15e03edde7aeedf198c1529f09c24a5bc0b06 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21120 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:18 +02:00
return complete_command(smbus_base);
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
}
int do_smbus_block_read(unsigned int smbus_base, u8 device, u8 cmd,
sb/intel/common: Fix SMBus block commands Clear LAST_BYTE flag at beginning of block commands. For reads, slave device determines in the message format how many bytes it has to transfer out, host firmware only dictates the maximum buffer length. Return SMBUS_ERROR if only partial message was received. For writes, return SMBUS_ERROR if length > 32. For writes, fix off-by-one error reading memory one byte past the buffer end. Change-Id: If9e5d24255a0a03039b52d2863bc278d0eefc311 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/20879 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2017-08-04 14:28:50 +02:00
unsigned int max_bytes, u8 *buf)
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
{
u8 status;
sb/intel/common: SMBus setup_command() Implements the common parts of any SMBus transaction with a stub to log and recover (TBD) from timeout errors. Bits in SMBHSTCTL register are no longer preserved between transactions. Change-Id: I7ce14d3e895c30d595a94ce29ce0dc8cf51eb453 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21118 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:11 +02:00
int ret, slave_bytes;
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
int bytes_read = 0;
unsigned int loops = SMBUS_TIMEOUT;
sb/intel/common: Tidy up SMBus block commands I forgot to push these changes before merging commit 1b04aa2 sb/intel/common: Fix SMBus block commands Change-Id: I7217f8c0cc78f2161faf31a4c49e3e9515026d15 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/21115 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2017-08-20 22:48:23 +02:00
max_bytes = MIN(SMBUS_BLOCK_MAXLEN, max_bytes);
sb/intel/common: Fix SMBus block commands Clear LAST_BYTE flag at beginning of block commands. For reads, slave device determines in the message format how many bytes it has to transfer out, host firmware only dictates the maximum buffer length. Return SMBUS_ERROR if only partial message was received. For writes, return SMBUS_ERROR if length > 32. For writes, fix off-by-one error reading memory one byte past the buffer end. Change-Id: If9e5d24255a0a03039b52d2863bc278d0eefc311 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/20879 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2017-08-04 14:28:50 +02:00
sb/intel/common: SMBus setup_command() Implements the common parts of any SMBus transaction with a stub to log and recover (TBD) from timeout errors. Bits in SMBHSTCTL register are no longer preserved between transactions. Change-Id: I7ce14d3e895c30d595a94ce29ce0dc8cf51eb453 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21118 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:11 +02:00
/* Set up for a block data read. */
ret = setup_command(smbus_base, I801_BLOCK_DATA, XMIT_READ(device));
if (ret < 0)
return ret;
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
/* Set the command/address... */
sb/intel/common: SMBus setup_command() Implements the common parts of any SMBus transaction with a stub to log and recover (TBD) from timeout errors. Bits in SMBHSTCTL register are no longer preserved between transactions. Change-Id: I7ce14d3e895c30d595a94ce29ce0dc8cf51eb453 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21118 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:11 +02:00
outb(cmd, smbus_base + SMBHSTCMD);
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
sb/intel/common: Fix SMBus block commands Clear LAST_BYTE flag at beginning of block commands. For reads, slave device determines in the message format how many bytes it has to transfer out, host firmware only dictates the maximum buffer length. Return SMBUS_ERROR if only partial message was received. For writes, return SMBUS_ERROR if length > 32. For writes, fix off-by-one error reading memory one byte past the buffer end. Change-Id: If9e5d24255a0a03039b52d2863bc278d0eefc311 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/20879 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2017-08-04 14:28:50 +02:00
/* Reset number of bytes to transfer so we notice later it
* was really updated with the transaction. */
outb(0, smbus_base + SMBHSTDAT0);
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
/* Start the command */
sb/intel/common: SMBus execute_command() Implement the common start of transaction. Fixes a problem where smbus_wait_until_active() can miss SMBHSTSTS_HOST_BUSY being set, if transaction completes very fast. Or if we are single-stepping or executing under SerialIce emulation. Change-Id: Icb27d7d6a1c54968950ca292dbae05415f97e461 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21119 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:15 +02:00
ret = execute_command(smbus_base);
if (ret < 0)
return ret;
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
/* Poll for transaction completion */
do {
status = inb(smbus_base + SMBHSTSTAT);
if (status & SMBHSTSTS_BYTE_DONE) { /* Byte done */
sb/intel/common: Fix SMBus block commands Clear LAST_BYTE flag at beginning of block commands. For reads, slave device determines in the message format how many bytes it has to transfer out, host firmware only dictates the maximum buffer length. Return SMBUS_ERROR if only partial message was received. For writes, return SMBUS_ERROR if length > 32. For writes, fix off-by-one error reading memory one byte past the buffer end. Change-Id: If9e5d24255a0a03039b52d2863bc278d0eefc311 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/20879 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2017-08-04 14:28:50 +02:00
if (bytes_read < max_bytes) {
sb/intel/common: Tidy up SMBus block commands I forgot to push these changes before merging commit 1b04aa2 sb/intel/common: Fix SMBus block commands Change-Id: I7217f8c0cc78f2161faf31a4c49e3e9515026d15 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/21115 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2017-08-20 22:48:23 +02:00
*buf++ = inb(smbus_base + SMBBLKDAT);
sb/intel/common: Fix SMBus block commands Clear LAST_BYTE flag at beginning of block commands. For reads, slave device determines in the message format how many bytes it has to transfer out, host firmware only dictates the maximum buffer length. Return SMBUS_ERROR if only partial message was received. For writes, return SMBUS_ERROR if length > 32. For writes, fix off-by-one error reading memory one byte past the buffer end. Change-Id: If9e5d24255a0a03039b52d2863bc278d0eefc311 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/20879 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2017-08-04 14:28:50 +02:00
bytes_read++;
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
}
sb/intel/common: Fix SMBus block commands Clear LAST_BYTE flag at beginning of block commands. For reads, slave device determines in the message format how many bytes it has to transfer out, host firmware only dictates the maximum buffer length. Return SMBUS_ERROR if only partial message was received. For writes, return SMBUS_ERROR if length > 32. For writes, fix off-by-one error reading memory one byte past the buffer end. Change-Id: If9e5d24255a0a03039b52d2863bc278d0eefc311 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/20879 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2017-08-04 14:28:50 +02:00
/* Engine internally completes the transaction
* and clears HOST_BUSY flag once the byte count
* from slave is reached.
*/
sb/intel/common: SMBus complete_command() Adds helper to test for SMBHSTSTAT flags for hardware having finished or failed a transaction. Change-Id: Idea15e03edde7aeedf198c1529f09c24a5bc0b06 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21120 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:18 +02:00
outb(SMBHSTSTS_BYTE_DONE, smbus_base + SMBHSTSTAT);
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
}
sb/intel/common: SMBus complete_command() Adds helper to test for SMBHSTSTAT flags for hardware having finished or failed a transaction. Change-Id: Idea15e03edde7aeedf198c1529f09c24a5bc0b06 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21120 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:18 +02:00
} while (--loops && !host_completed(status));
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
sb/intel/common: Fix HAVE_DEBUG_SMBUS Failed to build with DEBUG_SMBUS=y, slave_bytes is not initialized until inb(). Change-Id: Ia53717756ed74bc797a9529e36fc6965d6872101 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/21470 Reviewed-by: Nico Huber <nico.h@gmx.de> Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
2017-09-09 19:45:47 +02:00
/* Post-check we received complete message. */
slave_bytes = inb(smbus_base + SMBHSTDAT0);
sb/intel/common: Add HAVE_DEBUG_SMBUS Change-Id: Ifb1a1eff71968f31af9004ff00717f202d3ec29e Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/21117 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2017-08-20 20:36:08 +02:00
dprintk("%s: status = %02x, len = %d / %d, loops = %d\n",
__func__, status, bytes_read, slave_bytes, loops);
sb/intel/common: SMBus complete_command() Adds helper to test for SMBHSTSTAT flags for hardware having finished or failed a transaction. Change-Id: Idea15e03edde7aeedf198c1529f09c24a5bc0b06 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21120 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:18 +02:00
if (loops == 0)
return recover_master(smbus_base,
SMBUS_WAIT_UNTIL_DONE_TIMEOUT);
ret = cb_err_from_stat(status);
if (ret < 0)
return ret;
sb/intel/common: Fix SMBus block commands Clear LAST_BYTE flag at beginning of block commands. For reads, slave device determines in the message format how many bytes it has to transfer out, host firmware only dictates the maximum buffer length. Return SMBUS_ERROR if only partial message was received. For writes, return SMBUS_ERROR if length > 32. For writes, fix off-by-one error reading memory one byte past the buffer end. Change-Id: If9e5d24255a0a03039b52d2863bc278d0eefc311 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/20879 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2017-08-04 14:28:50 +02:00
if (bytes_read < slave_bytes)
return SMBUS_ERROR;
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
return bytes_read;
}
int do_smbus_block_write(unsigned int smbus_base, u8 device, u8 cmd,
sb/intel/common: Fix SMBus block commands Clear LAST_BYTE flag at beginning of block commands. For reads, slave device determines in the message format how many bytes it has to transfer out, host firmware only dictates the maximum buffer length. Return SMBUS_ERROR if only partial message was received. For writes, return SMBUS_ERROR if length > 32. For writes, fix off-by-one error reading memory one byte past the buffer end. Change-Id: If9e5d24255a0a03039b52d2863bc278d0eefc311 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/20879 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2017-08-04 14:28:50 +02:00
const unsigned int bytes, const u8 *buf)
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
{
u8 status;
sb/intel/common: SMBus setup_command() Implements the common parts of any SMBus transaction with a stub to log and recover (TBD) from timeout errors. Bits in SMBHSTCTL register are no longer preserved between transactions. Change-Id: I7ce14d3e895c30d595a94ce29ce0dc8cf51eb453 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21118 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:11 +02:00
int ret, bytes_sent = 0;
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
unsigned int loops = SMBUS_TIMEOUT;
sb/intel/common: Tidy up SMBus block commands I forgot to push these changes before merging commit 1b04aa2 sb/intel/common: Fix SMBus block commands Change-Id: I7217f8c0cc78f2161faf31a4c49e3e9515026d15 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/21115 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2017-08-20 22:48:23 +02:00
if (bytes > SMBUS_BLOCK_MAXLEN)
sb/intel/common: Fix SMBus block commands Clear LAST_BYTE flag at beginning of block commands. For reads, slave device determines in the message format how many bytes it has to transfer out, host firmware only dictates the maximum buffer length. Return SMBUS_ERROR if only partial message was received. For writes, return SMBUS_ERROR if length > 32. For writes, fix off-by-one error reading memory one byte past the buffer end. Change-Id: If9e5d24255a0a03039b52d2863bc278d0eefc311 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/20879 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2017-08-04 14:28:50 +02:00
return SMBUS_ERROR;
sb/intel/common: SMBus setup_command() Implements the common parts of any SMBus transaction with a stub to log and recover (TBD) from timeout errors. Bits in SMBHSTCTL register are no longer preserved between transactions. Change-Id: I7ce14d3e895c30d595a94ce29ce0dc8cf51eb453 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21118 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:11 +02:00
/* Set up for a block data write. */
ret = setup_command(smbus_base, I801_BLOCK_DATA, XMIT_WRITE(device));
if (ret < 0)
return ret;
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
/* Set the command/address... */
sb/intel/common: SMBus setup_command() Implements the common parts of any SMBus transaction with a stub to log and recover (TBD) from timeout errors. Bits in SMBHSTCTL register are no longer preserved between transactions. Change-Id: I7ce14d3e895c30d595a94ce29ce0dc8cf51eb453 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21118 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:11 +02:00
outb(cmd, smbus_base + SMBHSTCMD);
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
sb/intel/common: SMBus setup_command() Implements the common parts of any SMBus transaction with a stub to log and recover (TBD) from timeout errors. Bits in SMBHSTCTL register are no longer preserved between transactions. Change-Id: I7ce14d3e895c30d595a94ce29ce0dc8cf51eb453 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21118 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:11 +02:00
/* Set number of bytes to transfer. */
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
outb(bytes, smbus_base + SMBHSTDAT0);
sb/intel/common: Fix SMBus block commands Clear LAST_BYTE flag at beginning of block commands. For reads, slave device determines in the message format how many bytes it has to transfer out, host firmware only dictates the maximum buffer length. Return SMBUS_ERROR if only partial message was received. For writes, return SMBUS_ERROR if length > 32. For writes, fix off-by-one error reading memory one byte past the buffer end. Change-Id: If9e5d24255a0a03039b52d2863bc278d0eefc311 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/20879 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2017-08-04 14:28:50 +02:00
/* Send first byte from buffer, bytes_sent increments after
* hardware acknowledges it.
*/
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
outb(*buf++, smbus_base + SMBBLKDAT);
/* Start the command */
sb/intel/common: SMBus execute_command() Implement the common start of transaction. Fixes a problem where smbus_wait_until_active() can miss SMBHSTSTS_HOST_BUSY being set, if transaction completes very fast. Or if we are single-stepping or executing under SerialIce emulation. Change-Id: Icb27d7d6a1c54968950ca292dbae05415f97e461 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21119 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:15 +02:00
ret = execute_command(smbus_base);
if (ret < 0)
return ret;
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
/* Poll for transaction completion */
do {
status = inb(smbus_base + SMBHSTSTAT);
if (status & SMBHSTSTS_BYTE_DONE) {
sb/intel/common: Fix SMBus block commands Clear LAST_BYTE flag at beginning of block commands. For reads, slave device determines in the message format how many bytes it has to transfer out, host firmware only dictates the maximum buffer length. Return SMBUS_ERROR if only partial message was received. For writes, return SMBUS_ERROR if length > 32. For writes, fix off-by-one error reading memory one byte past the buffer end. Change-Id: If9e5d24255a0a03039b52d2863bc278d0eefc311 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/20879 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2017-08-04 14:28:50 +02:00
bytes_sent++;
if (bytes_sent < bytes)
outb(*buf++, smbus_base + SMBBLKDAT);
/* Engine internally completes the transaction
* and clears HOST_BUSY flag once the byte count
* has been reached.
*/
sb/intel/common: SMBus complete_command() Adds helper to test for SMBHSTSTAT flags for hardware having finished or failed a transaction. Change-Id: Idea15e03edde7aeedf198c1529f09c24a5bc0b06 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21120 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:18 +02:00
outb(SMBHSTSTS_BYTE_DONE, smbus_base + SMBHSTSTAT);
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
}
sb/intel/common: SMBus complete_command() Adds helper to test for SMBHSTSTAT flags for hardware having finished or failed a transaction. Change-Id: Idea15e03edde7aeedf198c1529f09c24a5bc0b06 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21120 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:18 +02:00
} while (--loops && !host_completed(status));
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
sb/intel/common: Add HAVE_DEBUG_SMBUS Change-Id: Ifb1a1eff71968f31af9004ff00717f202d3ec29e Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/21117 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2017-08-20 20:36:08 +02:00
dprintk("%s: status = %02x, len = %d / %d, loops = %d\n",
__func__, status, bytes_sent, bytes, loops);
sb/intel/common: SMBus complete_command() Adds helper to test for SMBHSTSTAT flags for hardware having finished or failed a transaction. Change-Id: Idea15e03edde7aeedf198c1529f09c24a5bc0b06 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21120 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:18 +02:00
if (loops == 0)
return recover_master(smbus_base,
SMBUS_WAIT_UNTIL_DONE_TIMEOUT);
ret = cb_err_from_stat(status);
if (ret < 0)
return ret;
sb/intel/common: Tidy up SMBus block commands I forgot to push these changes before merging commit 1b04aa2 sb/intel/common: Fix SMBus block commands Change-Id: I7217f8c0cc78f2161faf31a4c49e3e9515026d15 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/21115 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2017-08-20 22:48:23 +02:00
if (bytes_sent < bytes)
return SMBUS_ERROR;
sb/intel/common: Fix SMBus block commands Clear LAST_BYTE flag at beginning of block commands. For reads, slave device determines in the message format how many bytes it has to transfer out, host firmware only dictates the maximum buffer length. Return SMBUS_ERROR if only partial message was received. For writes, return SMBUS_ERROR if length > 32. For writes, fix off-by-one error reading memory one byte past the buffer end. Change-Id: If9e5d24255a0a03039b52d2863bc278d0eefc311 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/20879 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2017-08-04 14:28:50 +02:00
return bytes_sent;
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
}
/* Only since ICH5 */
int do_i2c_block_read(unsigned int smbus_base, u8 device,
sb/intel/common: Fix i2c block command Coding style, sync implementation with SMBus counterpart. Change-Id: I75f24e2308de945fc03289636ae914bb87070838 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/21116 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:03 +02:00
unsigned int offset, const unsigned int bytes, u8 *buf)
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
{
u8 status;
sb/intel/common: SMBus setup_command() Implements the common parts of any SMBus transaction with a stub to log and recover (TBD) from timeout errors. Bits in SMBHSTCTL register are no longer preserved between transactions. Change-Id: I7ce14d3e895c30d595a94ce29ce0dc8cf51eb453 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21118 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:11 +02:00
int ret, bytes_read = 0;
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
unsigned int loops = SMBUS_TIMEOUT;
sb/intel/common: SMBus setup_command() Implements the common parts of any SMBus transaction with a stub to log and recover (TBD) from timeout errors. Bits in SMBHSTCTL register are no longer preserved between transactions. Change-Id: I7ce14d3e895c30d595a94ce29ce0dc8cf51eb453 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21118 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:11 +02:00
/* Set up for a i2c block data read.
*
* FIXME: Address parameter changes to XMIT_READ(device) with
* some revision of PCH. Presumably hardware revisions that
* do not have i2c block write support internally set LSB.
*/
ret = setup_command(smbus_base, I801_I2C_BLOCK_DATA,
XMIT_WRITE(device));
if (ret < 0)
return ret;
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
/* device offset */
outb(offset, smbus_base + SMBHSTDAT1);
/* Start the command */
sb/intel/common: SMBus execute_command() Implement the common start of transaction. Fixes a problem where smbus_wait_until_active() can miss SMBHSTSTS_HOST_BUSY being set, if transaction completes very fast. Or if we are single-stepping or executing under SerialIce emulation. Change-Id: Icb27d7d6a1c54968950ca292dbae05415f97e461 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21119 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:15 +02:00
ret = execute_command(smbus_base);
if (ret < 0)
return ret;
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
/* Poll for transaction completion */
do {
status = inb(smbus_base + SMBHSTSTAT);
if (status & SMBHSTSTS_BYTE_DONE) {
sb/intel/common: Fix i2c block command Coding style, sync implementation with SMBus counterpart. Change-Id: I75f24e2308de945fc03289636ae914bb87070838 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/21116 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:03 +02:00
if (bytes_read < bytes) {
*buf++ = inb(smbus_base + SMBBLKDAT);
bytes_read++;
}
if (bytes_read + 1 >= bytes) {
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
/* indicate that next byte is the last one */
outb(inb(smbus_base + SMBHSTCTL)
| SMBHSTCNT_LAST_BYTE,
smbus_base + SMBHSTCTL);
}
sb/intel/common: Fix i2c block command Coding style, sync implementation with SMBus counterpart. Change-Id: I75f24e2308de945fc03289636ae914bb87070838 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/21116 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:03 +02:00
sb/intel/common: SMBus complete_command() Adds helper to test for SMBHSTSTAT flags for hardware having finished or failed a transaction. Change-Id: Idea15e03edde7aeedf198c1529f09c24a5bc0b06 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21120 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:18 +02:00
outb(SMBHSTSTS_BYTE_DONE, smbus_base + SMBHSTSTAT);
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
}
sb/intel/common: SMBus complete_command() Adds helper to test for SMBHSTSTAT flags for hardware having finished or failed a transaction. Change-Id: Idea15e03edde7aeedf198c1529f09c24a5bc0b06 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21120 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:18 +02:00
} while (--loops && !host_completed(status));
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
sb/intel/common: Add HAVE_DEBUG_SMBUS Change-Id: Ifb1a1eff71968f31af9004ff00717f202d3ec29e Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/21117 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2017-08-20 20:36:08 +02:00
dprintk("%s: status = %02x, len = %d / %d, loops = %d\n",
__func__, status, bytes_read, bytes, loops);
sb/intel/common: SMBus complete_command() Adds helper to test for SMBHSTSTAT flags for hardware having finished or failed a transaction. Change-Id: Idea15e03edde7aeedf198c1529f09c24a5bc0b06 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/21120 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:18 +02:00
if (loops == 0)
return recover_master(smbus_base,
SMBUS_WAIT_UNTIL_DONE_TIMEOUT);
ret = cb_err_from_stat(status);
if (ret < 0)
return ret;
sb/intel/common: Fix i2c block command Coding style, sync implementation with SMBus counterpart. Change-Id: I75f24e2308de945fc03289636ae914bb87070838 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/21116 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2017-08-20 20:36:03 +02:00
if (bytes_read < bytes)
return SMBUS_ERROR;
sb/intel/*: Use common SMBus functions All Intel southbridges implement the same SMBus functions. This patch replaces all these similar and mostly identical implementations with a common file. This also makes i2c block read available to all those southbridges. If the northbridge has to read a lot of SPD bytes sequentially, using this function can reduce the time being spent to read SPD five-fold. Change-Id: I93bb186e04e8c32dff04fc1abe4b5ecbc4c9c962 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/19258 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2017-04-12 17:01:31 +02:00
return bytes_read;
}
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