1 files changed, 0 insertions, 384 deletions
diff --git a/chip/stm32/clock-stm32l.c b/chip/stm32/clock-stm32l.c
deleted file mode 100644
index bb0da42d14..0000000000
--- a/chip/stm32/clock-stm32l.c
+++ /dev/null
@@ -1,384 +0,0 @@
-/* Copyright 2012 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.
- */
-
-/* Clocks and power management settings */
-
-#include "chipset.h"
-#include "clock.h"
-#include "common.h"
-#include "console.h"
-#include "cpu.h"
-#include "hooks.h"
-#include "registers.h"
-#include "util.h"
-
-#ifdef CONFIG_STM32L_FAKE_HIBERNATE
-#include "extpower.h"
-#include "keyboard_config.h"
-#include "lid_switch.h"
-#include "power.h"
-#include "power_button.h"
-#include "system.h"
-#include "task.h"
-
-static int fake_hibernate;
-#endif
-
-/* High-speed oscillator is 16 MHz */
-#define HSI_CLOCK 16000000
-/*
- * MSI is 2 MHz (default) 1 MHz, depending on ICSCR setting.  We use 1 MHz
- * because it's the lowest clock rate we can still run 115200 baud serial
- * for the debug console.
- */
-#define MSI_2MHZ_CLOCK BIT(21)
-#define MSI_1MHZ_CLOCK BIT(20)
-
-enum clock_osc {
-	OSC_INIT = 0,	/* Uninitialized */
-	OSC_HSI,	/* High-speed oscillator */
-	OSC_MSI,	/* Med-speed oscillator @ 1 MHz */
-};
-
-static int freq;
-static int current_osc;
-
-int clock_get_freq(void)
-{
-	return freq;
-}
-
-int clock_get_timer_freq(void)
-{
-	return clock_get_freq();
-}
-
-void clock_wait_bus_cycles(enum bus_type bus, uint32_t cycles)
-{
-	volatile uint32_t unused __attribute__((unused));
-
-	if (bus == BUS_AHB) {
-		while (cycles--)
-			unused = STM32_DMA1_REGS->isr;
-	} else { /* APB */
-		while (cycles--)
-			unused = STM32_USART_BRR(STM32_USART1_BASE);
-	}
-}
-
-/**
- * Set which oscillator is used for the clock
- *
- * @param osc		Oscillator to use
- */
-static void clock_set_osc(enum clock_osc osc)
-{
-	uint32_t tmp_acr;
-
-	if (osc == current_osc)
-		return;
-
-	if (current_osc != OSC_INIT)
-		hook_notify(HOOK_PRE_FREQ_CHANGE);
-
-	switch (osc) {
-	case OSC_HSI:
-		/* Ensure that HSI is ON */
-		wait_for_ready(&STM32_RCC_CR,
-			       STM32_RCC_CR_HSION, STM32_RCC_CR_HSIRDY);
-
-		/* Disable LPSDSR */
-		STM32_PWR_CR &= ~STM32_PWR_CR_LPSDSR;
-
-		/*
-		 * Set the recommended flash settings for 16MHz clock.
-		 *
-		 * The 3 bits must be programmed strictly sequentially.
-		 * Also, follow the RM to check 64-bit access and latency bit
-		 * after writing those bits to the FLASH_ACR register.
-		 */
-		tmp_acr = STM32_FLASH_ACR;
-		/* Enable 64-bit access */
-		tmp_acr |= STM32_FLASH_ACR_ACC64;
-		STM32_FLASH_ACR = tmp_acr;
-		/* Check ACC64 bit == 1 */
-		while (!(STM32_FLASH_ACR & STM32_FLASH_ACR_ACC64))
-			;
-
-		/* Enable Prefetch Buffer */
-		tmp_acr |= STM32_FLASH_ACR_PRFTEN;
-		STM32_FLASH_ACR = tmp_acr;
-
-		/* Flash 1 wait state */
-		tmp_acr |= STM32_FLASH_ACR_LATENCY;
-		STM32_FLASH_ACR = tmp_acr;
-		/* Check LATENCY bit == 1 */
-		while (!(STM32_FLASH_ACR & STM32_FLASH_ACR_LATENCY))
-			;
-
-		/* Switch to HSI */
-		STM32_RCC_CFGR = STM32_RCC_CFGR_SW_HSI;
-		/* RM says to check SWS bits to make sure HSI is the sysclock */
-		while ((STM32_RCC_CFGR & STM32_RCC_CFGR_SWS_MASK) !=
-			STM32_RCC_CFGR_SWS_HSI)
-			;
-
-		/* Disable MSI */
-		STM32_RCC_CR &= ~STM32_RCC_CR_MSION;
-
-		freq = HSI_CLOCK;
-		break;
-
-	case OSC_MSI:
-		/* Switch to MSI @ 1MHz */
-		STM32_RCC_ICSCR =
-			(STM32_RCC_ICSCR & ~STM32_RCC_ICSCR_MSIRANGE_MASK) |
-			STM32_RCC_ICSCR_MSIRANGE_1MHZ;
-		/* Ensure that MSI is ON */
-		wait_for_ready(&STM32_RCC_CR,
-			       STM32_RCC_CR_MSION, STM32_RCC_CR_MSIRDY);
-
-		/* Switch to MSI */
-		STM32_RCC_CFGR = STM32_RCC_CFGR_SW_MSI;
-		/* RM says to check SWS bits to make sure MSI is the sysclock */
-		while ((STM32_RCC_CFGR & STM32_RCC_CFGR_SWS_MASK) !=
-			STM32_RCC_CFGR_SWS_MSI)
-			;
-
-		/*
-		 * Set the recommended flash settings for <= 2MHz clock.
-		 *
-		 * The 3 bits must be programmed strictly sequentially.
-		 * Also, follow the RM to check 64-bit access and latency bit
-		 * after writing those bits to the FLASH_ACR register.
-		 */
-		tmp_acr = STM32_FLASH_ACR;
-		/* Flash 0 wait state */
-		tmp_acr &= ~STM32_FLASH_ACR_LATENCY;
-		STM32_FLASH_ACR = tmp_acr;
-		/* Check LATENCY bit == 0 */
-		while (STM32_FLASH_ACR & STM32_FLASH_ACR_LATENCY)
-			;
-
-		/* Disable prefetch Buffer */
-		tmp_acr &= ~STM32_FLASH_ACR_PRFTEN;
-		STM32_FLASH_ACR = tmp_acr;
-
-		/* Disable 64-bit access */
-		tmp_acr &= ~STM32_FLASH_ACR_ACC64;
-		STM32_FLASH_ACR = tmp_acr;
-		/* Check ACC64 bit == 0 */
-		while (STM32_FLASH_ACR & STM32_FLASH_ACR_ACC64)
-			;
-
-		/* Disable HSI */
-		STM32_RCC_CR &= ~STM32_RCC_CR_HSION;
-
-		/* Enable LPSDSR */
-		STM32_PWR_CR |= STM32_PWR_CR_LPSDSR;
-
-		freq = MSI_1MHZ_CLOCK;
-		break;
-
-	default:
-		break;
-	}
-
-	/* Notify modules of frequency change unless we're initializing */
-	if (current_osc != OSC_INIT) {
-		current_osc = osc;
-		hook_notify(HOOK_FREQ_CHANGE);
-	} else {
-		current_osc = osc;
-	}
-}
-
-static uint64_t clock_mask;
-
-void clock_enable_module(enum module_id module, int enable)
-{
-	uint64_t new_mask;
-
-	if (enable)
-		new_mask = clock_mask | BIT_ULL(module);
-	else
-		new_mask = clock_mask & ~BIT_ULL(module);
-
-	/* Only change clock if needed */
-	if ((!!new_mask) != (!!clock_mask)) {
-
-		/* Flush UART before switching clock speed */
-		cflush();
-
-		clock_set_osc(new_mask ? OSC_HSI : OSC_MSI);
-	}
-
-	if (module == MODULE_USB) {
-		if (enable)
-			STM32_RCC_APB1ENR |= STM32_RCC_PB1_USB;
-		else
-			STM32_RCC_APB1ENR &= ~STM32_RCC_PB1_USB;
-	}
-
-	clock_mask = new_mask;
-}
-
-int clock_is_module_enabled(enum module_id module)
-{
-	return !!(clock_mask & BIT_ULL(module));
-}
-
-#ifdef CONFIG_STM32L_FAKE_HIBERNATE
-/*
- *  This is for NOT having enough hibernate (more precisely, the stand-by mode)
- *  wake-up source pin. STM32L100 supports 3 wake-up source pins:
- *
- *     WKUP1 (PA0)  -- used for ACOK_PMU
- *     WKUP2 (PC13) -- used for LID_OPEN
- *     WKUP3 (PE6)  -- cannot be used due to IC package.
- *
- *  However, we need the power button as a wake-up source as well and there is
- *  no available pin for us (we don't want to move the ACOK_PMU pin).
- *
- *  Fortunately, the STM32L is low-power enough so that we don't need the
- *  super-low-power mode. So, we fake this hibernate mode and accept the
- *  following wake-up source.
- *
- *     RTC alarm  (faked as well).
- *     Power button
- *     Lid open
- *     AC detected
- *
- *  The original issue is here: crosbug.com/p/25435.
- */
-void __enter_hibernate(uint32_t seconds, uint32_t microseconds)
-{
-	int i;
-	fake_hibernate = 1;
-
-#ifdef CONFIG_POWER_COMMON
-	/*
-	 * A quick hack to stop annoying messages from charger task.
-	 *
-	 * When the battery is under 3%, the power task would call
-	 * power_off() to shutdown AP. However, the power_off() would
-	 * notify the HOOK_CHIPSET_SHUTDOWN, where the last hook is
-	 * charge_shutdown() and it hibernates the power task (infinite
-	 * loop -- not real CPU hibernate mode). Unfortunately, the
-	 * charger task is still running. It keeps generating annoying
-	 * log message.
-	 *
-	 * Thus, the hack is to set the power state machine (before we
-	 * enter infinite loop) so that the charger task thinks the AP
-	 * is off and stops generating messages.
-	 */
-	power_set_state(POWER_G3);
-#endif
-
-	/*
-	 * Change keyboard outputs to high-Z to reduce power draw.
-	 * We don't need corresponding code to change them back,
-	 * because fake hibernate is always exited with a reboot.
-	 *
-	 * A little hacky to do this here.
-	 */
-	for (i = GPIO_KB_OUT00; i < GPIO_KB_OUT00 + KEYBOARD_COLS_MAX; i++)
-		gpio_set_flags(i, GPIO_INPUT);
-
-	ccprints("fake hibernate. waits for power button/lid/RTC/AC");
-	cflush();
-
-	if (seconds || microseconds) {
-		if (seconds)
-			sleep(seconds);
-		if (microseconds)
-			usleep(microseconds);
-	} else {
-		while (1)
-			task_wait_event(-1);
-	}
-
-	ccprints("fake RTC alarm fires. resets EC");
-	cflush();
-	system_reset(SYSTEM_RESET_HARD);
-}
-
-static void fake_hibernate_power_button_hook(void)
-{
-	if (fake_hibernate && lid_is_open() && !power_button_is_pressed()) {
-		ccprints("%s() resets EC", __func__);
-		cflush();
-		system_reset(SYSTEM_RESET_HARD);
-	}
-}
-DECLARE_HOOK(HOOK_POWER_BUTTON_CHANGE, fake_hibernate_power_button_hook,
-	HOOK_PRIO_DEFAULT);
-
-static void fake_hibernate_lid_hook(void)
-{
-	if (fake_hibernate && lid_is_open()) {
-		ccprints("%s() resets EC", __func__);
-		cflush();
-		system_reset(SYSTEM_RESET_HARD);
-	}
-}
-DECLARE_HOOK(HOOK_LID_CHANGE, fake_hibernate_lid_hook, HOOK_PRIO_DEFAULT);
-
-static void fake_hibernate_ac_hook(void)
-{
-	if (fake_hibernate && extpower_is_present()) {
-		ccprints("%s() resets EC", __func__);
-		cflush();
-		system_reset(SYSTEM_RESET_HARD);
-	}
-}
-DECLARE_HOOK(HOOK_AC_CHANGE, fake_hibernate_ac_hook, HOOK_PRIO_DEFAULT);
-#endif
-
-void clock_init(void)
-{
-	/*
-	 * The initial state :
-	 *  SYSCLK from MSI (=2MHz), no divider on AHB, APB1, APB2
-	 *  PLL unlocked, RTC enabled on LSE
-	 */
-
-	/* Switch to high-speed oscillator */
-	clock_set_osc(1);
-}
-
-static void clock_chipset_startup(void)
-{
-	/* Return to full speed */
-	clock_enable_module(MODULE_CHIPSET, 1);
-}
-DECLARE_HOOK(HOOK_CHIPSET_STARTUP, clock_chipset_startup, HOOK_PRIO_DEFAULT);
-DECLARE_HOOK(HOOK_CHIPSET_RESUME, clock_chipset_startup, HOOK_PRIO_DEFAULT);
-
-static void clock_chipset_shutdown(void)
-{
-	/* Drop to lower clock speed if no other module requires full speed */
-	clock_enable_module(MODULE_CHIPSET, 0);
-}
-DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, clock_chipset_shutdown, HOOK_PRIO_DEFAULT);
-DECLARE_HOOK(HOOK_CHIPSET_SUSPEND, clock_chipset_shutdown, HOOK_PRIO_DEFAULT);
-
-static int command_clock(int argc, char **argv)
-{
-	if (argc >= 2) {
-		if (!strcasecmp(argv[1], "hsi"))
-			clock_set_osc(OSC_HSI);
-		else if (!strcasecmp(argv[1], "msi"))
-			clock_set_osc(OSC_MSI);
-		else
-			return EC_ERROR_PARAM1;
-	}
-
-	ccprintf("Clock frequency is now %d Hz\n", freq);
-	return EC_SUCCESS;
-}
-DECLARE_CONSOLE_COMMAND(clock, command_clock,
-			"hsi | msi",
-			"Set clock frequency");