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-rw-r--r--chip/npcx/spi.c259
1 files changed, 0 insertions, 259 deletions
diff --git a/chip/npcx/spi.c b/chip/npcx/spi.c
deleted file mode 100644
index 55fa8f85ab..0000000000
--- a/chip/npcx/spi.c
+++ /dev/null
@@ -1,259 +0,0 @@
-/* Copyright 2014 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.
- */
-
-/* SPI module for Chrome EC */
-
-#include "console.h"
-#include "gpio.h"
-#include "hooks.h"
-#include "clock.h"
-#include "clock_chip.h"
-#include "registers.h"
-#include "spi.h"
-#include "task.h"
-#include "timer.h"
-#include "util.h"
-
-/* Console output macros */
-#if !DEBUG_SPI
-#define CPUTS(...)
-#define CPRINTS(...)
-#else
-#define CPUTS(outstr) cputs(CC_SPI, outstr)
-#define CPRINTS(format, args...) cprints(CC_SPI, format, ## args)
-#endif
-
-/* SPI IP as SPI controller */
-#define SPI_CLK 8000000
-/**
- * Clear SPI data buffer.
- *
- * @param none
- * @return none.
- */
-static void clear_databuf(void)
-{
- volatile uint8_t unused __attribute__((unused));
- while (IS_BIT_SET(NPCX_SPI_STAT, NPCX_SPI_STAT_RBF))
- unused = NPCX_SPI_DATA;
-}
-
-/**
- * Preset SPI operation clock.
- *
- * @param none
- * @return none
- * @notes changed when initial or HOOK_FREQ_CHANGE command
- */
-void spi_freq_changed(void)
-{
- uint8_t prescaler_divider = 0;
-
- /* Set clock prescaler divider to SPI module*/
- prescaler_divider = (uint8_t)((uint32_t)clock_get_apb2_freq()
- / 2 / SPI_CLK);
- if (prescaler_divider >= 1)
- prescaler_divider = prescaler_divider - 1;
- if (prescaler_divider > 0x7F)
- prescaler_divider = 0x7F;
-
- /* Set core clock division factor in order to obtain the SPI clock */
- NPCX_SPI_CTL1 = (NPCX_SPI_CTL1&(~(((1<<7)-1)<<NPCX_SPI_CTL1_SCDV)))
- |(prescaler_divider<<NPCX_SPI_CTL1_SCDV);
-}
-DECLARE_HOOK(HOOK_FREQ_CHANGE, spi_freq_changed, HOOK_PRIO_FIRST);
-
-/**
- * Set SPI enabled.
- *
- * @spi_device SPI device to act on.
- * @param enable enabled flag
- * @return success
- */
-int spi_enable(const struct spi_device_t *spi_device, int enable)
-{
- enum gpio_signal gpio;
-
- if (enable) {
- /* Enabling spi module for gpio configuration */
- gpio_config_module(MODULE_SPI, 1);
- /* GPIO No SPI Select */
- CLEAR_BIT(NPCX_DEVALT(0), NPCX_DEVALT0_GPIO_NO_SPIP);
-
- gpio = spi_device->gpio_cs;
- /* Make sure CS# is in GPIO output mode. */
- gpio_set_flags(gpio, GPIO_OUTPUT);
- /* Make sure CS# is deselected */
- gpio_set_level(gpio, 1);
-
- /* Enabling spi module */
- SET_BIT(NPCX_SPI_CTL1, NPCX_SPI_CTL1_SPIEN);
- } else {
- /* Disabling spi module */
- CLEAR_BIT(NPCX_SPI_CTL1, NPCX_SPI_CTL1_SPIEN);
- gpio = spi_device->gpio_cs;
- /* Make sure CS# is deselected */
- gpio_set_level(gpio, 1);
- gpio_set_flags(gpio, GPIO_ODR_HIGH);
- /* Disabling spi module for gpio configuration */
- gpio_config_module(MODULE_SPI, 0);
- /* GPIO No SPI Select */
- SET_BIT(NPCX_DEVALT(0), NPCX_DEVALT0_GPIO_NO_SPIP);
- }
- return EC_SUCCESS;
-}
-
-
-/**
- * Flush an SPI transaction and receive data from peripheral.
- *
- * @param spi_device device to talk to
- * @param txdata transfer data
- * @param txlen transfer length
- * @param rxdata receive data
- * @param rxlen receive length
- * @return success
- * @notes set controller transaction mode in npcx chip
- */
-int spi_transaction(const struct spi_device_t *spi_device,
- const uint8_t *txdata, int txlen,
- uint8_t *rxdata, int rxlen)
-{
- int i = 0;
- enum gpio_signal gpio = spi_device->gpio_cs;
- static struct mutex spi_lock;
-
- mutex_lock(&spi_lock);
- /* Make sure CS# is a GPIO output mode. */
- gpio_set_flags(gpio, GPIO_OUTPUT);
- /* Make sure CS# is deselected */
- gpio_set_level(gpio, 1);
- /* Cleaning junk data in the buffer */
- clear_databuf();
- /* Assert CS# to start transaction */
- gpio_set_level(gpio, 0);
- CPRINTS("NPCX_SPI_DATA=%x", NPCX_SPI_DATA);
- CPRINTS("NPCX_SPI_CTL1=%x", NPCX_SPI_CTL1);
- CPRINTS("NPCX_SPI_STAT=%x", NPCX_SPI_STAT);
- /* Writing the data */
- for (i = 0; i < txlen; ++i) {
- /* Making sure we can write */
- while (IS_BIT_SET(NPCX_SPI_STAT, NPCX_SPI_STAT_BSY))
- ;
- /* Write the data */
- NPCX_SPI_DATA = txdata[i];
- CPRINTS("txdata[i]=%x", txdata[i]);
- /* Waiting till reading is finished */
- while (!IS_BIT_SET(NPCX_SPI_STAT, NPCX_SPI_STAT_RBF))
- ;
- /* Reading the (unused) data */
- clear_databuf();
- }
- CPRINTS("write end");
- /* Reading the data */
- for (i = 0; i < rxlen; ++i) {
- /* Making sure we can write */
- while (IS_BIT_SET(NPCX_SPI_STAT, NPCX_SPI_STAT_BSY))
- ;
- /* Write the (unused) data */
- NPCX_SPI_DATA = 0;
- /* Wait till reading is finished */
- while (!IS_BIT_SET(NPCX_SPI_STAT, NPCX_SPI_STAT_RBF))
- ;
- /* Reading the data */
- rxdata[i] = (uint8_t)NPCX_SPI_DATA;
- CPRINTS("rxdata[i]=%x", rxdata[i]);
- }
- /* Deassert CS# (high) to end transaction */
- gpio_set_level(gpio, 1);
- mutex_unlock(&spi_lock);
-
- return EC_SUCCESS;
-}
-
-/**
- * SPI initial.
- *
- * @param none
- * @return none
- */
-static void spi_init(void)
-{
- int i;
- /* Enable clock for SPI peripheral */
- clock_enable_peripheral(CGC_OFFSET_SPI, CGC_SPI_MASK,
- CGC_MODE_RUN | CGC_MODE_SLEEP);
-
- /* Disabling spi module */
- for (i = 0; i < spi_devices_used; i++)
- spi_enable(&spi_devices[i], 0);
-
- /* Disabling spi irq */
- CLEAR_BIT(NPCX_SPI_CTL1, NPCX_SPI_CTL1_EIR);
- CLEAR_BIT(NPCX_SPI_CTL1, NPCX_SPI_CTL1_EIW);
-
- /* Setting clocking mode to normal mode */
- CLEAR_BIT(NPCX_SPI_CTL1, NPCX_SPI_CTL1_SCM);
- /* Setting 8bit mode transfer */
- CLEAR_BIT(NPCX_SPI_CTL1, NPCX_SPI_CTL1_MOD);
- /* Set core clock division factor in order to obtain the spi clock */
- spi_freq_changed();
-
- /* We emit zeros in idle (default behaivor) */
- CLEAR_BIT(NPCX_SPI_CTL1, NPCX_SPI_CTL1_SCIDL);
-
- CPRINTS("nSPI_COMP=%x", IS_BIT_SET(NPCX_STRPST, NPCX_STRPST_SPI_COMP));
- CPRINTS("SPI_SP_SEL=%x", IS_BIT_SET(NPCX_DEV_CTL4,
- NPCX_DEV_CTL4_SPI_SP_SEL));
- /* Cleaning junk data in the buffer */
- clear_databuf();
-}
-DECLARE_HOOK(HOOK_INIT, spi_init, HOOK_PRIO_INIT_SPI);
-
-/*****************************************************************************/
-/* Console commands */
-#ifdef CONFIG_CMD_SPI_FLASH
-static int printrx(const char *desc, const uint8_t *txdata, int txlen,
- int rxlen)
-{
- uint8_t rxdata[32];
- int rv;
- int i;
-
- rv = spi_transaction(SPI_FLASH_DEVICE, txdata, txlen, rxdata, rxlen);
- if (rv)
- return rv;
-
- CPRINTS("%-12s:", desc);
- for (i = 0; i < rxlen; i++)
- CPRINTS(" 0x%02x", rxdata[i]);
- CPUTS("\n");
- return EC_SUCCESS;
-}
-
-static int command_spirom(int argc, char **argv)
-{
- uint8_t txmandev[] = {0x90, 0x00, 0x00, 0x00};
- uint8_t txjedec[] = {0x9f};
- uint8_t txunique[] = {0x4b, 0x00, 0x00, 0x00, 0x00};
- uint8_t txsr1[] = {0x05};
- uint8_t txsr2[] = {0x35};
-
- spi_enable(SPI_FLASH_DEVICE, 1);
-
- printrx("Man/Dev ID", txmandev, sizeof(txmandev), 2);
- printrx("JEDEC ID", txjedec, sizeof(txjedec), 3);
- printrx("Unique ID", txunique, sizeof(txunique), 8);
- printrx("Status reg 1", txsr1, sizeof(txsr1), 1);
- printrx("Status reg 2", txsr2, sizeof(txsr2), 1);
-
- spi_enable(SPI_FLASH_DEVICE, 0);
-
- return EC_SUCCESS;
-}
-DECLARE_CONSOLE_COMMAND(spirom, command_spirom,
- NULL,
- "Test reading SPI EEPROM");
-#endif
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