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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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <baytrail/gpio.h>
#include <device/pci.h>
#include <console/console.h>
/* GPIO-to-Pad LUTs */
static const u8 gpncore_gpio_to_pad[GPNCORE_COUNT] =
{ 25, 24, 23, 32, 33, 34, 36, 37, 35, 22,
20, 21, 18, 38, 39, 1, 4, 8, 17, 0,
3, 6, 16, 19, 2, 5, 9 };
static const u8 gpscore_gpio_to_pad[GPSCORE_COUNT] =
{ 85, 89, 93, 96, 99, 102, 98, 101, 34, 37,
36, 38, 39, 35, 40, 84, 62, 61, 64, 59,
54, 56, 60, 55, 63, 57, 51, 50, 53, 47,
52, 49, 48, 43, 46, 41, 45, 42, 58, 44,
95, 105, 70, 68, 67, 66, 69, 71, 65, 72,
86, 90, 88, 92, 103, 77, 79, 83, 78, 81,
80, 82, 13, 12, 15, 14, 17, 18, 19, 16,
2, 1, 0, 4, 6, 7, 9, 8, 33, 32,
31, 30, 29, 27, 25, 28, 26, 23, 21, 20,
24, 22, 5, 3, 10, 11, 106, 87, 91, 104,
97, 100 };
static const u8 gpssus_gpio_to_pad[GPSSUS_COUNT] =
{ 29, 33, 30, 31, 32, 34, 36, 35, 38, 37,
18, 7, 11, 20, 17, 1, 8, 10, 19, 12,
0, 2, 23, 39, 28, 27, 22, 21, 24, 25,
26, 51, 56, 54, 49, 55, 48, 47, 50, 58,
52, 53, 59, 40 };
/* 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,
};
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,
};
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,
};
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;
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 */
reg = bank->pad_base + 16 * bank->gpio_to_pad[gpio];
#ifdef GPIO_DEBUG
printk(BIOS_DEBUG, "Write Pad: Base(%x) - %x %x %x\n",
reg, config->pad_conf0, config->pad_conf1,
config->pad_val );
#endif
write32(reg + PAD_CONF0_REG, config->pad_conf0);
write32(reg + PAD_CONF1_REG, config->pad_conf1);
write32(reg + PAD_VAL_REG, 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);
}
}
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);
}
}
struct soc_gpio_config* __attribute__((weak)) mainboard_get_gpios(void)
{
printk(BIOS_DEBUG, "Default/empty GPIO config\n");
return NULL;
}
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