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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2013 Google 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc.
*/
#include <device/pci.h>
#include <console/console.h>
#include <baytrail/gpio.h>
#include <baytrail/pmc.h>
#include <baytrail/smm.h>
/*
* GPIO-to-Pad LUTs
*
* These tables translate the GPIO number to the pad configuration register
* for that GPIO in the memory-mapped pad configuration registers.
* See the tables:
* PCU iLB GPIO CFIO_SCORE Address Map
* PCU iLB GPIO CFIO_SSUS Address Map
*/
#ifndef __PRE_RAM__
static const u8 gpncore_gpio_to_pad[GPNCORE_COUNT] =
{ 19, 18, 17, 20, 21, 22, 24, 25, /* [ 0: 7] */
23, 16, 14, 15, 12, 26, 27, 1, /* [ 8:15] */
4, 8, 11, 0, 3, 6, 10, 13, /* [16:23] */
2, 5, 9 }; /* [24:26] */
#endif
static const u8 gpscore_gpio_to_pad[GPSCORE_COUNT] =
{ 85, 89, 93, 96, 99, 102, 98, 101, /* [ 0: 7] */
34, 37, 36, 38, 39, 35, 40, 84, /* [ 8: 15] */
62, 61, 64, 59, 54, 56, 60, 55, /* [16: 23] */
63, 57, 51, 50, 53, 47, 52, 49, /* [24: 31] */
48, 43, 46, 41, 45, 42, 58, 44, /* [32: 39] */
95, 105, 70, 68, 67, 66, 69, 71, /* [40: 47] */
65, 72, 86, 90, 88, 92, 103, 77, /* [48: 55] */
79, 83, 78, 81, 80, 82, 13, 12, /* [56: 63] */
15, 14, 17, 18, 19, 16, 2, 1, /* [64: 71] */
0, 4, 6, 7, 9, 8, 33, 32, /* [72: 79] */
31, 30, 29, 27, 25, 28, 26, 23, /* [80: 87] */
21, 20, 24, 22, 5, 3, 10, 11, /* [88: 95] */
106, 87, 91, 104, 97, 100 }; /* [96:101] */
static const u8 gpssus_gpio_to_pad[GPSSUS_COUNT] =
{ 29, 33, 30, 31, 32, 34, 36, 35, /* [ 0: 7] */
38, 37, 18, 7, 11, 20, 17, 1, /* [ 8:15] */
8, 10, 19, 12, 0, 2, 23, 39, /* [16:23] */
28, 27, 22, 21, 24, 25, 26, 51, /* [24:31] */
56, 54, 49, 55, 48, 57, 50, 58, /* [32:39] */
52, 53, 59, 40 }; /* [40:43] */
#ifndef __PRE_RAM__
/* GPIO bank descriptions */
static const struct gpio_bank gpncore_bank = {
.gpio_count = GPNCORE_COUNT,
.gpio_to_pad = gpncore_gpio_to_pad,
.legacy_base = GP_LEGACY_BASE_NONE,
.pad_base = GPNCORE_PAD_BASE,
.has_wake_en = 0,
.gpio_f1_range_start = GPNCORE_GPIO_F1_RANGE_START,
.gpio_f1_range_end = GPNCORE_GPIO_F1_RANGE_END,
};
static const struct gpio_bank gpscore_bank = {
.gpio_count = GPSCORE_COUNT,
.gpio_to_pad = gpscore_gpio_to_pad,
.legacy_base = GPSCORE_LEGACY_BASE,
.pad_base = GPSCORE_PAD_BASE,
.has_wake_en = 0,
.gpio_f1_range_start = GPSCORE_GPIO_F1_RANGE_START,
.gpio_f1_range_end = GPSCORE_GPIO_F1_RANGE_END,
};
static const struct gpio_bank gpssus_bank = {
.gpio_count = GPSSUS_COUNT,
.gpio_to_pad = gpssus_gpio_to_pad,
.legacy_base = GPSSUS_LEGACY_BASE,
.pad_base = GPSSUS_PAD_BASE,
.has_wake_en = 1,
.gpio_f1_range_start = GPSSUS_GPIO_F1_RANGE_START,
.gpio_f1_range_end = GPSSUS_GPIO_F1_RANGE_END,
};
static void setup_gpios(const struct soc_gpio_map *gpios,
const struct gpio_bank *bank)
{
const struct soc_gpio_map *config;
int gpio = 0;
u32 reg, pad_conf0, *regmmio;
u8 set, bit;
u32 use_sel[4] = {0};
u32 io_sel[4] = {0};
u32 gp_lvl[4] = {0};
u32 tpe[4] = {0};
u32 tne[4] = {0};
u32 wake_en[4] = {0};
if (!gpios)
return;
for (config = gpios; config->pad_conf0 != GPIO_LIST_END;
config++, gpio++) {
if (gpio > bank->gpio_count)
break;
set = gpio >> 5;
bit = gpio % 32;
if (bank->legacy_base != GP_LEGACY_BASE_NONE) {
/* Legacy IO configuration */
use_sel[set] |= config->use_sel << bit;
io_sel[set] |= config->io_sel << bit;
gp_lvl[set] |= config->gp_lvl << bit;
tpe[set] |= config->tpe << bit;
tne[set] |= config->tne << bit;
/* Some banks do not have wake_en ability */
if (bank->has_wake_en)
wake_en[set] |= config->wake_en << bit;
}
/* Pad configuration registers */
regmmio = (u32 *)(bank->pad_base + 16 *
bank->gpio_to_pad[gpio]);
/* Add correct func to GPIO pad config */
pad_conf0 = config->pad_conf0;
if (config->is_gpio)
{
if (gpio >= bank->gpio_f1_range_start &&
gpio <= bank->gpio_f1_range_end)
pad_conf0 |= PAD_FUNC1;
else
pad_conf0 |= PAD_FUNC0;
}
#ifdef GPIO_DEBUG
printk(BIOS_DEBUG, "Write Pad: Base(%p) - %x %x %x\n",
regmmio, pad_conf0, config->pad_conf1, config->pad_val);
#endif
write32(regmmio + (PAD_CONF0_REG/sizeof(u32)), pad_conf0);
write32(regmmio + (PAD_CONF1_REG/sizeof(u32)),
config->pad_conf1);
write32(regmmio + (PAD_VAL_REG/sizeof(u32)), config->pad_val);
}
if (bank->legacy_base != GP_LEGACY_BASE_NONE)
for (set = 0; set <= (bank->gpio_count - 1) / 32; ++set) {
reg = bank->legacy_base + 0x20 * set;
#ifdef GPIO_DEBUG
printk(BIOS_DEBUG,
"Write GPIO: Reg(%x) - %x %x %x %x %x\n",
reg, use_sel[set], io_sel[set], gp_lvl[set],
tpe[set], tne[set]);
#endif
outl(use_sel[set], reg + LEGACY_USE_SEL_REG);
outl(io_sel[set], reg + LEGACY_IO_SEL_REG);
outl(gp_lvl[set], reg + LEGACY_GP_LVL_REG);
outl(tpe[set], reg + LEGACY_TPE_REG);
outl(tne[set], reg + LEGACY_TNE_REG);
/* TS registers are WOC */
outl(0, reg + LEGACY_TS_REG);
if (bank->has_wake_en)
outl(wake_en[set], reg + LEGACY_WAKE_EN_REG);
}
}
static void setup_gpio_route(const struct soc_gpio_map *sus,
const struct soc_gpio_map *core)
{
uint32_t route_reg = 0;
int i;
for (i = 0; i < 8; i++) {
/* SMI takes precedence and wake_en implies SCI. */
if (sus[i].smi) {
route_reg |= ROUTE_SMI << (2 * i);
} else if (sus[i].sci) {
route_reg |= ROUTE_SCI << (2 * i);
}
if (core[i].smi) {
route_reg |= ROUTE_SMI << (2 * (i + 8));
} else if (core[i].sci) {
route_reg |= ROUTE_SCI << (2 * (i + 8));
}
}
#if IS_ENABLED(CONFIG_HAVE_SMI_HANDLER)
southcluster_smm_save_gpio_route(route_reg);
#endif
}
static void setup_dirqs(const u8 dirq[GPIO_MAX_DIRQS],
const struct gpio_bank *bank)
{
u32 *reg = (u32 *)(bank->pad_base + PAD_BASE_DIRQ_OFFSET);
u32 val;
int i;
/* Write all four DIRQ registers */
for (i=0; i<4; ++i) {
val = dirq[i * 4 + 3] << 24 | dirq[i * 4 + 2] << 16 |
dirq[i * 4 + 1] << 8 | dirq[i * 4];
write32(reg + i, val);
#ifdef GPIO_DEBUG
printk(BIOS_DEBUG, "Write DIRQ reg(%x) - %x\n",
reg + i, val);
#endif
}
}
void setup_soc_gpios(struct soc_gpio_config *config)
{
if (config) {
setup_gpios(config->ncore, &gpncore_bank);
setup_gpios(config->score, &gpscore_bank);
setup_gpios(config->ssus, &gpssus_bank);
setup_gpio_route(config->ssus, config->score);
if (config->core_dirq)
setup_dirqs(*config->core_dirq, &gpscore_bank);
if (config->sus_dirq)
setup_dirqs(*config->sus_dirq, &gpssus_bank);
}
}
struct soc_gpio_config* __attribute__((weak)) mainboard_get_gpios(void)
{
printk(BIOS_DEBUG, "Default/empty GPIO config\n");
return NULL;
}
#endif /* #ifndef __PRE_RAM__ */
/** \brief returns the input / output value from an SCORE GPIO
*
* @param gpio_num The GPIO number being read
* @return The current input or output value of the GPIO
*/
uint8_t read_score_gpio(uint8_t gpio_num)
{
uint8_t retval = 0;
if (gpio_num < GPSCORE_COUNT)
retval = score_get_gpio(gpscore_gpio_to_pad[gpio_num]);
return retval;
}
/** \brief returns the input / output value from an SSUS GPIO
*
* @param gpio_num The GPIO number being read
* @return The current input or output value of the GPIO
*/
uint8_t read_ssus_gpio(uint8_t gpio_num)
{
uint8_t retval = 0;
if (gpio_num < GPSSUS_COUNT)
retval = ssus_get_gpio(gpssus_gpio_to_pad[gpio_num]);
return retval;
}
/** \brief Sets up the function, pulls, and Input/Output of a Baytrail
* SSUS (S5) or SCORE (S0) GPIO
*
* @param ssus_gpio 1 if SSUS GPIO is being configured 0 if SCORE GPIO
* @param gpio_num The GPIO number being configured
* @param pconf0 function, pull direction, and pull value
* function: PAD_FUNC0 - PAD_FUNC7
* pull assign: PAD_PULL_DISABLE / PAD_PULL_UP / PAD_PULL_DOWN
* pull_value: PAD_PU_2K / PAD_PU_10K / PAD_PU_20K / PAD_PU_40K
* @param pad_val input / output state and pad value
* io state: PAD_VAL_INPUT / PAD_VAL_OUTPUT
* pad value: PAD_VAL_HIGH / PAD_VAL_LOW
*/
static void configure_ssus_score_gpio(uint8_t ssus_gpio, uint8_t gpio_num,
uint32_t pconf0, uint32_t pad_val)
{
uint32_t reg;
uint32_t *pad_addr;
if (ssus_gpio)
pad_addr = ssus_pconf0(gpssus_gpio_to_pad[gpio_num]);
else
pad_addr = score_pconf0(gpscore_gpio_to_pad[gpio_num]);
if ((ssus_gpio && gpio_num >= GPSSUS_COUNT) ||
(gpio_num >= GPSCORE_COUNT)){
printk(BIOS_WARNING,"Warning: Invalid %s GPIO specified (%d)\n",
ssus_gpio ? "SSUS" : "SCORE", gpio_num);
return;
}
/*
* Pad Configuration 0 Register
* 2:0 - func_pin_mux
* 8:7 - Pull assignment: 00 - Non pull 01 - Pull Up 10 - Pull down
* 11 - reserved
* 10:9 - Pull strength: 00 - 2K 01 - 10K 10 - 20K 11 - 40K
*/
reg = PAD_CONFIG0_DEFAULT;
reg |= pconf0 & 0x787;
write32(pad_addr + (PAD_CONF0_REG/sizeof(u32)), reg);
/*
* Pad Value Register
* 0: Pad value
* 1: output enable (0 is enabled)
* 2: input enable (0 is enabled)
*/
reg = read32(pad_addr + (PAD_VAL_REG/sizeof(u32)));
reg &= ~0x7;
reg |= pad_val & 0x7;
write32(pad_addr + (PAD_VAL_REG/sizeof(u32)), reg);
}
/** \brief Sets up the function, pulls, and Input/Output of a Baytrail S5 GPIO
*
*/
void configure_ssus_gpio(uint8_t gpio_num, uint32_t pconf0, uint32_t pad_val)
{
configure_ssus_score_gpio(1, gpio_num, pconf0, pad_val);
}
/** \brief Sets up the function, pulls, and Input/Output of a Baytrail S5 GPIO
*
*/
void configure_score_gpio(uint8_t gpio_num, uint32_t pconf0, uint32_t pad_val)
{
configure_ssus_score_gpio(0, gpio_num, pconf0, pad_val);
}
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