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espi: Add support for debug helper to print slave capabilities

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This change adds a Kconfig option to enable eSPI debugging that pulls
in a helper function to print slave capabilities.

BUG=b:153675913

Signed-off-by: Furquan Shaikh <furquan@google.com>
Change-Id: I8ff250fe85dfa9370bf93ce3c7e2de5c069bf9e9
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41254
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This commit is contained in:
Furquan Shaikh
2020-05-11 12:11:27 -07:00
parent 470f627c2b
commit 5cc41f2a6b
4 changed files with 111 additions and 0 deletions
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94
src/lib/espi_debug.c Normal file
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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#include <console/console.h>
#include <espi.h>
#include <stdint.h>
void espi_show_slave_general_configuration(uint32_t config)
{
uint32_t io_mode;
uint32_t op_freq;
printk(BIOS_DEBUG, "eSPI Slave configuration:\n");
if (config & ESPI_SLAVE_CRC_ENABLE)
printk(BIOS_DEBUG, " CRC checking enabled\n");
if (config & ESPI_SLAVE_RESP_MOD_ENABLE)
printk(BIOS_DEBUG, " Response modifier enabled\n");
if (config & ESPI_SLAVE_ALERT_MODE_PIN)
printk(BIOS_DEBUG, " Dedicated Alert# used to signal alert event\n");
else
printk(BIOS_DEBUG, " IO bit1 pin used to signal alert event\n");
io_mode = config & ESPI_SLAVE_IO_MODE_SEL_MASK;
if (io_mode == ESPI_SLAVE_IO_MODE_SEL_SINGLE)
printk(BIOS_DEBUG, " eSPI single IO mode selected\n");
else if (io_mode == ESPI_SLAVE_IO_MODE_SEL_DUAL)
printk(BIOS_DEBUG, " eSPI dual IO mode selected\n");
else if (io_mode == ESPI_SLAVE_IO_MODE_SEL_QUAD)
printk(BIOS_DEBUG, " eSPI quad IO mode selected\n");
else
printk(BIOS_DEBUG, " Error: Invalid eSPI IO mode selected\n");
io_mode = config & ESPI_SLAVE_IO_MODE_SUPP_MASK;
if (io_mode == ESPI_SLAVE_IO_MODE_SUPP_SINGLE_QUAD)
printk(BIOS_DEBUG, " eSPI quad and single IO modes supported\n");
else if (io_mode == ESPI_SLAVE_IO_MODE_SUPP_SINGLE_DUAL)
printk(BIOS_DEBUG, " eSPI dual and single IO mode supported\n");
else if (io_mode == ESPI_SLAVE_IO_MODE_SUPP_SINGLE_DUAL_QUAD)
printk(BIOS_DEBUG, " eSPI quad, dual, and single IO modes supported\n");
else
printk(BIOS_DEBUG, " Only eSPI single IO mode supported\n");
if (config & ESPI_SLAVE_OPEN_DRAIN_ALERT_SEL)
printk(BIOS_DEBUG, " Alert# pin is open-drain\n");
else
printk(BIOS_DEBUG, " Alert# pin is driven\n");
op_freq = config & ESPI_SLAVE_OP_FREQ_SEL_MASK;
if (op_freq == ESPI_SLAVE_OP_FREQ_SEL_20_MHZ)
printk(BIOS_DEBUG, " eSPI 20MHz selected\n");
else if (op_freq == ESPI_SLAVE_OP_FREQ_SEL_25_MHZ)
printk(BIOS_DEBUG, " eSPI 25MHz selected\n");
else if (op_freq == ESPI_SLAVE_OP_FREQ_SEL_33_MHZ)
printk(BIOS_DEBUG, " eSPI 33MHz selected\n");
else if (op_freq == ESPI_SLAVE_OP_FREQ_SEL_50_MHZ)
printk(BIOS_DEBUG, " eSPI 50MHz selected\n");
else if (op_freq == ESPI_SLAVE_OP_FREQ_SEL_66_MHZ)
printk(BIOS_DEBUG, " eSPI 66MHz selected\n");
else
printk(BIOS_DEBUG, " Error: Invalid eSPI frequency\n");
if (config & ESPI_SLAVE_OPEN_DRAIN_ALERT_SUPP)
printk(BIOS_DEBUG, " Open-drain Alert# pin supported\n");
op_freq = config & ESPI_SLAVE_OP_FREQ_SUPP_MASK;
if (op_freq == ESPI_SLAVE_OP_FREQ_SUPP_20_MHZ)
printk(BIOS_DEBUG, " eSPI 20MHz supported\n");
else if (op_freq == ESPI_SLAVE_OP_FREQ_SUPP_25_MHZ)
printk(BIOS_DEBUG, " eSPI 25MHz supported\n");
else if (op_freq == ESPI_SLAVE_OP_FREQ_SUPP_33_MHZ)
printk(BIOS_DEBUG, " eSPI 33MHz supported\n");
else if (op_freq == ESPI_SLAVE_OP_FREQ_SUPP_50_MHZ)
printk(BIOS_DEBUG, " eSPI 50MHz supported\n");
else if (op_freq == ESPI_SLAVE_OP_FREQ_SUPP_66_MHZ)
printk(BIOS_DEBUG, " eSPI 66MHz supported\n");
else
printk(BIOS_DEBUG, " Error: Invalid eSPI frequency\n");
printk(BIOS_DEBUG, " Maximum Wait state: %d\n",
(config & ESPI_SLAVE_MAX_WAIT_MASK) >> ESPI_SLAVE_MAX_WAIT_SHIFT);
if (config & ESPI_SLAVE_PERIPH_CH_SUPP)
printk(BIOS_DEBUG, " Peripheral Channel supported\n");
if (config & ESPI_SLAVE_VW_CH_SUPP)
printk(BIOS_DEBUG, " Virtual Wire Channel supported\n");
if (config & ESPI_SLAVE_OOB_CH_SUPP)
printk(BIOS_DEBUG, " OOB Channel supported\n");
if (config & ESPI_SLAVE_FLASH_CH_SUPP)
printk(BIOS_DEBUG, " Flash Access Channel supported\n");
printk(BIOS_DEBUG, "\n");
}