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-rw-r--r--chip/npcx/peci.c298
1 files changed, 0 insertions, 298 deletions
diff --git a/chip/npcx/peci.c b/chip/npcx/peci.c
deleted file mode 100644
index badfbd87d9..0000000000
--- a/chip/npcx/peci.c
+++ /dev/null
@@ -1,298 +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.
- */
-
-/* PECI interface for Chrome EC */
-
-#include "chipset.h"
-#include "clock.h"
-#include "clock_chip.h"
-#include "common.h"
-#include "console.h"
-#include "gpio.h"
-#include "hooks.h"
-#include "peci.h"
-#include "registers.h"
-#include "task.h"
-#include "timer.h"
-#include "temp_sensor.h"
-#include "util.h"
-
-
-/* Initial PECI baud rate */
-#define PECI_BAUD_RATE 750000
-
-#define TEMP_AVG_LENGTH 4 /* Should be power of 2 */
-
-
-/* PECI Time-out */
-#define PECI_DONE_TIMEOUT_US (10*MSEC)
-
-#define NULL_PENDING_TASK_ID 0xFFFFFFFF
-#define PECI_MAX_FIFO_SIZE 16
-#define PROC_SOCKET 0x30
-/* PECI Command Code */
-enum peci_command_t {
- PECI_COMMAND_PING = 0x00,
- PECI_COMMAND_GET_DIB = 0xF7,
- PECI_COMMAND_GET_TEMP = 0x01,
- PECI_COMMAND_RD_PKG_CFG = 0xA1,
- PECI_COMMAND_WR_PKG_CFG = 0xA5,
- PECI_COMMAND_RD_IAMSR = 0xB1,
- PECI_COMMAND_RD_PCI_CFG = 0x61,
- PECI_COMMAND_RD_PCI_CFG_LOCAL = 0xE1,
- PECI_COMMAND_WR_PCI_CFG_LOCAL = 0xE5,
- PECI_COMMAND_NONE = 0xFF
-};
-
-#define PECI_COMMAND_GET_TEMP_WR_LENS 0x00
-#define PECI_COMMAND_GET_TEMP_RD_LENS 0x02
-
-/* PECI Domain Number */
-static int temp_vals[TEMP_AVG_LENGTH];
-static int temp_idx;
-static uint8_t peci_sts;
-/* For PECI Done interrupt usage */
-static int peci_pending_task_id;
-
-/*****************************************************************************/
-/* Internal functions */
-
-/**
- * This routine initiates the parameters of a PECI transaction
- *
- * @param wr_length How many byte of *wr_data went to be send
- * @param rd_length How many byte went to received (not include FCS)
- * @param cmd_code Command code
- * @param *wr_data Buffer pointer of write data
- * @return TASK_EVENT_PECI_DONE that mean slave had a response
- */
-static uint32_t peci_trans(
- uint8_t wr_length,
- uint8_t rd_length,
- enum peci_command_t cmd_code,
- uint8_t *wr_data
-)
-{
- uint32_t events;
- /* Ensure no PECI transaction is in progress */
- if (IS_BIT_SET(NPCX_PECI_CTL_STS, NPCX_PECI_CTL_STS_START_BUSY)) {
- /*
- * PECI transaction is in progress -
- * can not initiate a new one
- */
- return 0;
- }
- /* Set basic transaction parameters */
- NPCX_PECI_ADDR = PROC_SOCKET;
- NPCX_PECI_CMD = cmd_code;
- /* Aviod over space */
- if (rd_length > PECI_MAX_FIFO_SIZE)
- rd_length = PECI_MAX_FIFO_SIZE;
- /* Read-Length */
- NPCX_PECI_RD_LENGTH = rd_length;
- if (wr_length > PECI_MAX_FIFO_SIZE)
- wr_length = PECI_MAX_FIFO_SIZE;
- /* copy of data */
- for (events = 0; events < wr_length; events++)
- NPCX_PECI_DATA_OUT(events) = wr_data[events];
- /* Write-Length */
- if (cmd_code != PECI_COMMAND_PING) {
- if ((cmd_code == PECI_COMMAND_WR_PKG_CFG) ||
- (cmd_code == PECI_COMMAND_WR_PCI_CFG_LOCAL)) {
- /*CMD+AWFCS*/
- NPCX_PECI_WR_LENGTH = wr_length + 2;
- /* Enable AWFCS */
- SET_BIT(NPCX_PECI_CTL_STS, NPCX_PECI_CTL_STS_AWFCS_EN);
- } else {
- /*CMD*/
- NPCX_PECI_WR_LENGTH = wr_length + 1;
- /* Enable AWFCS */
- CLEAR_BIT(NPCX_PECI_CTL_STS,
- NPCX_PECI_CTL_STS_AWFCS_EN);
- }
- }
-
- /* Start the PECI transaction */
- SET_BIT(NPCX_PECI_CTL_STS, NPCX_PECI_CTL_STS_START_BUSY);
-
- /* It should be using a interrupt , don't waste cpu computing power */
- peci_pending_task_id = task_get_current();
- return task_wait_event_mask(TASK_EVENT_PECI_DONE,
- PECI_DONE_TIMEOUT_US);
-
-}
-
-/**
- * PECI transaction error status.
- *
- * @return Bit3 - CRC error Bit4 - ABRT error
- */
-static uint8_t peci_check_error_state(void)
-{
- return peci_sts;
-}
-
-/*****************************************************************************/
-/* PECI drivers */
-int peci_get_cpu_temp(void)
-{
- uint32_t events;
- int16_t cpu_temp = -1;
-
- /* Start PECI trans */
- events = peci_trans(PECI_COMMAND_GET_TEMP_WR_LENS,
- PECI_COMMAND_GET_TEMP_RD_LENS,
- PECI_COMMAND_GET_TEMP, NULL);
- /* if return DONE , that mean slave had a PECI response */
- if ((events & TASK_EVENT_PECI_DONE) == TASK_EVENT_PECI_DONE) {
- /* check CRC & ABRT */
- events = peci_check_error_state();
- if (events) {
- ;
- } else {
- uint16_t *ptr;
- ptr = (uint16_t *)&cpu_temp;
- ptr[0] = (NPCX_PECI_DATA_IN(1) << 8) |
- (NPCX_PECI_DATA_IN(0) << 0);
- }
- }
- return (int)cpu_temp;
-}
-
-int peci_temp_sensor_get_val(int idx, int *temp_ptr)
-{
- int sum = 0;
- int success_cnt = 0;
- int i;
-
- if (!chipset_in_state(CHIPSET_STATE_ON))
- return EC_ERROR_NOT_POWERED;
-
- for (i = 0; i < TEMP_AVG_LENGTH; ++i) {
- if (temp_vals[i] >= 0) {
- success_cnt++;
- sum += temp_vals[i];
- }
- }
-
- /*
- * Require at least two valid samples. When the AP transitions into S0,
- * it is possible, depending on the timing of the PECI sample, to read
- * an invalid temperature. This is very rare, but when it does happen
- * the temperature returned is CONFIG_PECI_TJMAX. Requiring two valid
- * samples here assures us that one bad maximum temperature reading
- * when entering S0 won't cause us to trigger an over temperature.
- */
- if (success_cnt < 2)
- return EC_ERROR_UNKNOWN;
-
- *temp_ptr = sum / success_cnt;
- return EC_SUCCESS;
-}
-
-static void peci_temp_sensor_poll(void)
-{
- int val;
-
- val = peci_get_cpu_temp();
- if (val != -1) {
- temp_vals[temp_idx] = val;
- temp_idx = (temp_idx + 1) & (TEMP_AVG_LENGTH - 1);
- }
-}
-DECLARE_HOOK(HOOK_TICK, peci_temp_sensor_poll, HOOK_PRIO_TEMP_SENSOR);
-
-static void peci_freq_changed(void)
-{
- /* PECI's clock source is FMCLK */
- int freq = clock_get_fm_freq();
- int baud = 0xF;
-
- /* Disable polling while reconfiguring */
- NPCX_PECI_CTL_STS = 0;
-
- /*
- * Set the maximum bit rate used by the PECI module during both
- * Address Timing Negotiation and Data Timing Negotiation.
- * The resulting maximum bit rate MAX_BIT_RATE in decimal is
- * according to the following formula:
- *
- * MAX_BIT_RATE [d] = (freq / (4 * baudrate)) - 1
- * Maximum bit rate should not extend the field's boundaries.
- */
- if (freq != 0) {
- baud = (uint8_t)(freq / (4 * PECI_BAUD_RATE)) - 1;
- /* Set maximum PECI baud rate (bit0 - bit4) */
- if (baud > 0x1F)
- baud = 0x1F;
- }
- /* Enhanced High-Speed */
- if (baud >= 7) {
- CLEAR_BIT(NPCX_PECI_RATE, 6);
- CLEAR_BIT(NPCX_PECI_CFG, 3);
- } else {
- SET_BIT(NPCX_PECI_RATE, 6);
- SET_BIT(NPCX_PECI_CFG, 3);
- }
- /* Setting Rate */
- NPCX_PECI_RATE = baud;
-}
-DECLARE_HOOK(HOOK_FREQ_CHANGE, peci_freq_changed, HOOK_PRIO_DEFAULT);
-
-static void peci_init(void)
-{
- int i;
-
- /* Enable clock for PECI peripheral */
- clock_enable_peripheral(CGC_OFFSET_PECI, CGC_PECI_MASK,
- CGC_MODE_RUN | CGC_MODE_SLEEP);
- /* Set PECI freq */
- peci_freq_changed();
-
- /* make sure PECI_DATA function pin enable */
- CLEAR_BIT(NPCX_DEVALT(0x0A), 6);
- /* Set initial clock frequency */
- peci_freq_changed();
- /* Initialize temperature reading buffer to a valid value. */
- for (i = 0; i < TEMP_AVG_LENGTH; ++i)
- temp_vals[i] = 300; /* 27 C */
-
- /* init Pending task id */
- peci_pending_task_id = NULL_PENDING_TASK_ID;
- /* Enable PECI Done interrupt */
- SET_BIT(NPCX_PECI_CTL_STS, NPCX_PECI_CTL_STS_DONE_EN);
-
- task_enable_irq(NPCX_IRQ_PECI);
-}
-DECLARE_HOOK(HOOK_INIT, peci_init, HOOK_PRIO_DEFAULT);
-
-/* If received a PECI DONE interrupt, post the event to PECI task */
-void peci_done_interrupt(void){
- if (peci_pending_task_id != NULL_PENDING_TASK_ID)
- task_set_event(peci_pending_task_id, TASK_EVENT_PECI_DONE);
- peci_sts = NPCX_PECI_CTL_STS & 0x18;
- /* no matter what, clear status bit again */
- SET_BIT(NPCX_PECI_CTL_STS, NPCX_PECI_CTL_STS_DONE);
- SET_BIT(NPCX_PECI_CTL_STS, NPCX_PECI_CTL_STS_CRC_ERR);
- SET_BIT(NPCX_PECI_CTL_STS, NPCX_PECI_CTL_STS_ABRT_ERR);
-}
-DECLARE_IRQ(NPCX_IRQ_PECI, peci_done_interrupt, 4);
-
-/*****************************************************************************/
-/* Console commands */
-
-static int command_peci_temp(int argc, char **argv)
-{
- int t = peci_get_cpu_temp();
- if (t == -1) {
- ccprintf("PECI response timeout\n");
- return EC_ERROR_UNKNOWN;
- }
- ccprintf("CPU temp = %d K = %d\n", t, K_TO_C(t));
- return EC_SUCCESS;
-}
-DECLARE_CONSOLE_COMMAND(pecitemp, command_peci_temp,
- NULL,
- "Print CPU temperature");
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