diff options
Diffstat (limited to 'chip/mec1322/lfw/ec_lfw.c')
| -rw-r--r-- | chip/mec1322/lfw/ec_lfw.c | 283 |
1 files changed, 0 insertions, 283 deletions
diff --git a/chip/mec1322/lfw/ec_lfw.c b/chip/mec1322/lfw/ec_lfw.c deleted file mode 100644 index 1fb334e144..0000000000 --- a/chip/mec1322/lfw/ec_lfw.c +++ /dev/null @@ -1,283 +0,0 @@ -/* Copyright 2015 The Chromium OS Authors. All rights reserved. - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - * - * MEC1322 SoC little FW - * - */ - -#include <stdint.h> - -#include "config.h" -#include "cros_version.h" -#include "gpio.h" -#include "spi.h" -#include "spi_flash.h" -#include "util.h" -#include "timer.h" -#include "dma.h" -#include "registers.h" -#include "cpu.h" -#include "clock.h" -#include "system.h" -#include "hwtimer.h" -#include "gpio_list.h" - -#include "ec_lfw.h" - -__attribute__ ((section(".intvector"))) -const struct int_vector_t hdr_int_vect = { - (void *)0x11FA00, /* init sp, unused, - set by MEC ROM loader*/ - &lfw_main, /* reset vector */ - &fault_handler, /* NMI handler */ - &fault_handler, /* HardFault handler */ - &fault_handler, /* MPU fault handler */ - &fault_handler /* Bus fault handler */ -}; - -/* SPI devices - from glados/board.c*/ -const struct spi_device_t spi_devices[] = { - { CONFIG_SPI_FLASH_PORT, 0, GPIO_PVT_CS0}, -}; -const unsigned int spi_devices_used = ARRAY_SIZE(spi_devices); - - -void timer_init() -{ - uint32_t val = 0; - - /* Ensure timer is not running */ - MEC1322_TMR32_CTL(0) &= ~BIT(5); - - /* Enable timer */ - MEC1322_TMR32_CTL(0) |= BIT(0); - - val = MEC1322_TMR32_CTL(0); - - /* Pre-scale = 48 -> 1MHz -> Period = 1us */ - val = (val & 0xffff) | (47 << 16); - - MEC1322_TMR32_CTL(0) = val; - - /* Set preload to use the full 32 bits of the timer */ - MEC1322_TMR32_PRE(0) = 0xffffffff; - - /* Override the count */ - MEC1322_TMR32_CNT(0) = 0xffffffff; - - /* Auto restart */ - MEC1322_TMR32_CTL(0) |= BIT(3); - - /* Start counting in timer 0 */ - MEC1322_TMR32_CTL(0) |= BIT(5); - -} - -static int spi_flash_readloc(uint8_t *buf_usr, - unsigned int offset, - unsigned int bytes) -{ - uint8_t cmd[4] = {SPI_FLASH_READ, - (offset >> 16) & 0xFF, - (offset >> 8) & 0xFF, - offset & 0xFF}; - - if (offset + bytes > CONFIG_FLASH_SIZE_BYTES) - return EC_ERROR_INVAL; - - return spi_transaction(SPI_FLASH_DEVICE, cmd, 4, buf_usr, bytes); -} - -int spi_image_load(uint32_t offset) -{ - uint8_t *buf = (uint8_t *) (CONFIG_RW_MEM_OFF + - CONFIG_PROGRAM_MEMORY_BASE); - uint32_t i; - - BUILD_ASSERT(CONFIG_RO_SIZE == CONFIG_RW_SIZE); - memset((void *)buf, 0xFF, (CONFIG_RO_SIZE - 4)); - - for (i = 0; i < CONFIG_RO_SIZE; i += SPI_CHUNK_SIZE) - spi_flash_readloc(&buf[i], offset + i, SPI_CHUNK_SIZE); - - return 0; - -} - -void udelay(unsigned us) -{ - uint32_t t0 = __hw_clock_source_read(); - while (__hw_clock_source_read() - t0 < us) - ; -} - -void usleep(unsigned us) -{ - udelay(us); -} - -int timestamp_expired(timestamp_t deadline, const timestamp_t *now) -{ - timestamp_t now_val; - - if (!now) { - now_val = get_time(); - now = &now_val; - } - - return now->le.lo >= deadline.le.lo; -} - - -timestamp_t get_time(void) -{ - timestamp_t ts; - - ts.le.hi = 0; - ts.le.lo = __hw_clock_source_read(); - return ts; -} - -void uart_write_c(char c) -{ - /* Put in carriage return prior to newline to mimic uart_vprintf() */ - if (c == '\n') - uart_write_c('\r'); - - /* Wait for space in transmit FIFO. */ - while (!(MEC1322_UART_LSR & BIT(5))) - ; - MEC1322_UART_TB = c; -} - -void uart_puts(const char *str) -{ - if (!str || !*str) - return; - - do { - uart_write_c(*str++); - } while (*str); -} - -void fault_handler(void) -{ - uart_puts("EXCEPTION!\nTriggering watchdog reset\n"); - /* trigger reset in 1 ms */ - MEC1322_WDG_LOAD = 1; - MEC1322_WDG_CTL |= 1; - while (1) - ; - -} - -void jump_to_image(uintptr_t init_addr) -{ - void (*resetvec)(void) = (void(*)(void))init_addr; - resetvec(); -} - -void uart_init(void) -{ - /* Set UART to reset on VCC1_RESET instaed of nSIO_RESET */ - MEC1322_UART_CFG &= ~BIT(1); - - /* Baud rate = 115200. 1.8432MHz clock. Divisor = 1 */ - - /* Set CLK_SRC = 0 */ - MEC1322_UART_CFG &= ~BIT(0); - - /* Set DLAB = 1 */ - MEC1322_UART_LCR |= BIT(7); - - /* PBRG0/PBRG1 */ - MEC1322_UART_PBRG0 = 1; - MEC1322_UART_PBRG1 = 0; - - /* Set DLAB = 0 */ - MEC1322_UART_LCR &= ~BIT(7); - - /* Set word length to 8-bit */ - MEC1322_UART_LCR |= BIT(0) | BIT(1); - - /* Enable FIFO */ - MEC1322_UART_FCR = BIT(0); - - /* Activate UART */ - MEC1322_UART_ACT |= BIT(0); - - gpio_config_module(MODULE_UART, 1); -} - -void system_init(void) -{ - - uint32_t wdt_sts = MEC1322_VBAT_STS & MEC1322_VBAT_STS_WDT; - uint32_t rst_sts = MEC1322_PCR_CHIP_PWR_RST & - MEC1322_PWR_RST_STS_VCC1; - - if (rst_sts || wdt_sts) - MEC1322_VBAT_RAM(MEC1322_IMAGETYPE_IDX) = EC_IMAGE_RO; -} - -enum ec_image system_get_image_copy(void) -{ - return MEC1322_VBAT_RAM(MEC1322_IMAGETYPE_IDX); -} - -void lfw_main() -{ - - uintptr_t init_addr; - - /* install vector table */ - *((uintptr_t *) 0xe000ed08) = (uintptr_t) &hdr_int_vect; - - /* Use 48 MHz processor clock to power through boot */ - MEC1322_PCR_PROC_CLK_CTL = 1; - -#ifdef CONFIG_WATCHDOG - /* Reload watchdog which may be running in case of sysjump */ - MEC1322_WDG_KICK = 1; -#ifdef CONFIG_WATCHDOG_HELP - /* Stop aux timer */ - MEC1322_TMR16_CTL(0) &= ~1; -#endif -#endif - - timer_init(); - clock_init(); - cpu_init(); - dma_init(); - uart_init(); - system_init(); - spi_enable(SPI_FLASH_DEVICE, 1); - - uart_puts("littlefw "); - uart_puts(current_image_data.version); - uart_puts("\n"); - - switch (system_get_image_copy()) { - case EC_IMAGE_RW: - uart_puts("lfw-RW load\n"); - init_addr = CONFIG_RW_MEM_OFF + CONFIG_PROGRAM_MEMORY_BASE; - spi_image_load(CONFIG_EC_WRITABLE_STORAGE_OFF + - CONFIG_RW_STORAGE_OFF); - break; - case EC_IMAGE_RO: - uart_puts("lfw-RO load\n"); - spi_image_load(CONFIG_EC_PROTECTED_STORAGE_OFF + - CONFIG_RO_STORAGE_OFF); - /* fall through */ - default: - MEC1322_VBAT_RAM(MEC1322_IMAGETYPE_IDX) = EC_IMAGE_RO; - init_addr = CONFIG_RO_MEM_OFF + CONFIG_PROGRAM_MEMORY_BASE; - } - - jump_to_image(*(uintptr_t *)(init_addr + 4)); - - /* should never get here */ - while (1) - ; -} |