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/*
* This file is part of the coreboot project.
*
* Copyright 2014 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 <arch/cache.h>
#include <boardid.h>
#include <boot/coreboot_tables.h>
#include <console/console.h>
#include <delay.h>
#include <device/device.h>
#include <gpio.h>
#include <soc/clock.h>
#include <soc/usb.h>
#include <string.h>
#include <symbols.h>
#include <vendorcode/google/chromeos/chromeos.h>
/* convenient shorthand (in MB) */
#define DRAM_START ((uintptr_t)_dram / MiB)
#define DRAM_SIZE (CONFIG_DRAM_SIZE_MB)
#define DRAM_END (DRAM_START + DRAM_SIZE)
/* DMA memory for drivers */
#define DMA_START ((uintptr_t)_dma_coherent / MiB)
#define DMA_SIZE (_dma_coherent_size / MiB)
#define USB_ENABLE_GPIO 51
static void setup_usb(void)
{
#if !CONFIG_BOARD_VARIANT_AP148
gpio_tlmm_config_set(USB_ENABLE_GPIO, FUNC_SEL_GPIO,
GPIO_PULL_UP, GPIO_10MA, GPIO_ENABLE);
gpio_set(USB_ENABLE_GPIO, 1);
#endif
usb_clock_config();
setup_usb_host1();
}
static void setup_mmu(void)
{
dcache_mmu_disable();
/* Map Device memory. */
mmu_config_range(0, DRAM_START, DCACHE_OFF);
/* Disable Page 0 for trapping NULL pointer references. */
mmu_disable_range(0, 1);
/* Map DRAM memory */
mmu_config_range(DRAM_START, DRAM_SIZE, DCACHE_WRITEBACK);
/* Map DMA memory */
mmu_config_range(DMA_START, DMA_SIZE, DCACHE_OFF);
mmu_disable_range(DRAM_END, 4096 - DRAM_END);
mmu_init();
dcache_mmu_enable();
}
#define TPM_RESET_GPIO 22
static void setup_tpm(void)
{
if (board_id() != BOARD_ID_PROTO_0)
return; /* Only proto0 have TPM reset connected to GPIO22 */
gpio_tlmm_config_set(TPM_RESET_GPIO, FUNC_SEL_GPIO, GPIO_PULL_UP,
GPIO_4MA, GPIO_ENABLE);
/*
* Generate a reset pulse. The spec calls for 80 us minimum, let's
* make it twice as long. If the output was driven low originally, the
* reset pulse will be even longer.
*/
gpio_set(TPM_RESET_GPIO, 0);
udelay(160);
gpio_set(TPM_RESET_GPIO, 1);
}
#define SW_RESET_GPIO 26
static void deassert_sw_reset(void)
{
if (board_id() == BOARD_ID_PROTO_0)
return;
/*
* only proto0.2 and later care about this. This signal is eventually
* driving the ehernet switch reset input, which is active low. But
* since this signal gets inverted along the way, the GPIO needs to be
* driven low to take the switch out of reset.
*/
gpio_tlmm_config_set(SW_RESET_GPIO, FUNC_SEL_GPIO,
GPIO_PULL_UP, GPIO_4MA, GPIO_ENABLE);
gpio_set(SW_RESET_GPIO, 0);
}
static void mainboard_init(device_t dev)
{
setup_mmu();
setup_usb();
deassert_sw_reset();
setup_tpm();
/* Functionally a 0-cost no-op if NAND is not present */
board_nand_init();
#if IS_ENABLED(CONFIG_CHROMEOS)
/* Copy WIFI calibration data into CBMEM. */
cbmem_add_vpd_calibration_data();
#endif
}
static void mainboard_enable(device_t dev)
{
dev->ops->init = &mainboard_init;
}
struct chip_operations mainboard_ops = {
.name = "storm",
.enable_dev = mainboard_enable,
};
void lb_board(struct lb_header *header)
{
struct lb_range *dma;
dma = (struct lb_range *)lb_new_record(header);
dma->tag = LB_TAB_DMA;
dma->size = sizeof(*dma);
dma->range_start = (uintptr_t)_dma_coherent;
dma->range_size = _dma_coherent_size;
#if IS_ENABLED(CONFIG_CHROMEOS)
/* Retrieve the switch interface MAC addressses. */
lb_table_add_macs_from_vpd(header);
#endif
}
static int read_gpio(gpio_t gpio_num)
{
gpio_tlmm_config_set(gpio_num, GPIO_FUNC_DISABLE,
GPIO_NO_PULL, GPIO_2MA, GPIO_DISABLE);
udelay(10); /* Should be enough to settle. */
return gpio_get(gpio_num);
}
void fill_lb_gpios(struct lb_gpios *gpios)
{
struct lb_gpio *gpio;
const int GPIO_COUNT = 5;
gpios->size = sizeof(*gpios) + (GPIO_COUNT * sizeof(struct lb_gpio));
gpios->count = GPIO_COUNT;
gpio = gpios->gpios;
fill_lb_gpio(gpio++, 15, ACTIVE_LOW, "developer", read_gpio(15));
fill_lb_gpio(gpio++, 16, ACTIVE_LOW, "recovery", read_gpio(16));
fill_lb_gpio(gpio++, 17, ACTIVE_LOW, "write protect", read_gpio(17));
fill_lb_gpio(gpio++, -1, ACTIVE_LOW, "power", 1);
fill_lb_gpio(gpio++, -1, ACTIVE_LOW, "lid", 0);
}
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