void clock_init(void)
{
/*
* The initial state :
* SYSCLK from HSI (=8MHz), no divider on AHB, APB1, APB2
* PLL unlocked, RTC enabled on LSE
*/
config_hispeed_clock();
/* configure RTC clock */
wait_rtc_ready();
prepare_rtc_write();
/* set RTC divider to /1 */
STM32_RTC_PRLH = 0;
STM32_RTC_PRLL = 0;
finalize_rtc_write();
/* setup RTC EXTINT17 to wake up us from STOP mode */
STM32_EXTI_IMR |= (1 << 17);
STM32_EXTI_RTSR |= (1 << 17);
/*
* Our deep sleep mode is STOP mode.
* clear PDDS (stop mode) , set LDDS (regulator in low power mode)
*/
STM32_PWR_CR = (STM32_PWR_CR & ~2) | 1;
/* Enable RTC interrupts */
task_enable_irq(STM32_IRQ_RTC_WAKEUP);
task_enable_irq(STM32_IRQ_RTC_ALARM);
}
static void lpc_task_enable_irq(void){
task_enable_irq(NPCX_IRQ_SHM);
task_enable_irq(NPCX_IRQ_KBC_IBF);
task_enable_irq(NPCX_IRQ_PM_CHAN_IBF);
task_enable_irq(NPCX_IRQ_PORT80);
}
int __hw_clock_source_init(uint32_t start_t)
{
/* Set the reload and current value. */
GR_TIMEHS_BGLOAD(0, 1) = 0xffffffff;
GR_TIMEHS_LOAD(0, 1) = 0xffffffff;
/* HW Timer enabled, periodic, interrupt enabled, 32-bit, wrapping */
GR_TIMEHS_CONTROL(0, 1) = 0xe2;
/* Event timer disabled */
__hw_clock_event_clear();
/* Account for the clock speed. */
update_prescaler();
/* Clear any pending interrupts */
GR_TIMEHS_INTCLR(0, 1) = 0x1;
/* Force the time to whatever we're told it is */
__hw_clock_source_set(start_t);
/* Here we go... */
task_enable_irq(GC_IRQNUM_TIMEHS0_TIMINT1);
task_enable_irq(GC_IRQNUM_TIMEHS0_TIMINT2);
/* Return the Event timer IRQ number (NOT the HW timer IRQ) */
return GC_IRQNUM_TIMEHS0_TIMINT2;
}
static void gpio_init(void)
{
task_enable_irq(MEC1322_IRQ_GIRQ8);
task_enable_irq(MEC1322_IRQ_GIRQ9);
task_enable_irq(MEC1322_IRQ_GIRQ10);
task_enable_irq(MEC1322_IRQ_GIRQ11);
task_enable_irq(MEC1322_IRQ_GIRQ20);
}
static void setup_ipc(void)
{
task_enable_irq(ISH_IPC_HOST2ISH_IRQ);
task_enable_irq(ISH_IPC_ISH2HOST_CLR_IRQ);
ipc_set_pimr(IPC_PEER_HOST_ID, SET_PIMR, PIMR_SIGNAL_IN);
ipc_set_pimr(IPC_PEER_HOST_ID, SET_PIMR, PIMR_SIGNAL_CLR);
}
int sps_register_rx_handler(enum sps_mode mode, rx_handler_f rx_handler)
{
if (sps_rx_handler)
return -1;
sps_rx_handler = rx_handler;
sps_configure(mode, SPI_CLOCK_MODE0);
task_enable_irq(GC_IRQNUM_SPS0_RXFIFO_LVL_INTR);
task_enable_irq(GC_IRQNUM_SPS0_CS_DEASSERT_INTR);
return 0;
}
static void i2c_init(void)
{
/*
* TODO(crosbug.com/p/23763): Add config options to determine which
* channels to init.
*/
i2c_init_port(I2C1);
i2c_init_port(I2C2);
/* Enable event and error interrupts */
task_enable_irq(STM32_IRQ_I2C2_EV);
task_enable_irq(STM32_IRQ_I2C2_ER);
}
static void adc_init(void)
{
int i;
/* Configure GPIOs */
configure_gpio();
/*
* Temporarily enable the PLL when turning on the clock to the ADC
* module, to work around chip errata (10.4). No need to notify
* other modules; the PLL isn't enabled long enough to matter.
*/
clock_enable_pll(1, 0);
/* Enable ADC0 module in run and sleep modes. */
clock_enable_peripheral(CGC_OFFSET_ADC, 0x1,
CGC_MODE_RUN | CGC_MODE_SLEEP);
/*
* Use external voltage references (VREFA+, VREFA-) instead of
* VDDA and GNDA.
*/
LM4_ADC_ADCCTL = 0x01;
/* Use internal oscillator */
LM4_ADC_ADCCC = 0x1;
/* Disable the PLL now that the ADC is using the internal oscillator */
clock_enable_pll(0, 0);
/* No tasks waiting yet */
for (i = 0; i < LM4_ADC_SEQ_COUNT; i++)
task_waiting_on_ss[i] = TASK_ID_INVALID;
/* Enable IRQs */
task_enable_irq(LM4_IRQ_ADC0_SS0);
task_enable_irq(LM4_IRQ_ADC0_SS1);
task_enable_irq(LM4_IRQ_ADC0_SS2);
task_enable_irq(LM4_IRQ_ADC0_SS3);
/* 2**6 = 64x oversampling */
LM4_ADC_ADCSAC = 6;
/* Initialize ADC sequencer */
for (i = 0; i < ADC_CH_COUNT; ++i)
adc_configure(adc_channels + i);
/* Disable ADC0 module until it is needed to conserve power. */
clock_disable_peripheral(CGC_OFFSET_ADC, 0x1,
CGC_MODE_RUN | CGC_MODE_SLEEP);
}
int __hw_clock_source_init(uint32_t start_t)
{
/*
* 1. Use ITIM16-1 as internal time reading
* 2. Use ITIM16-2 for event handling
*/
/* Enable clock for ITIM peripheral */
clock_enable_peripheral(CGC_OFFSET_TIMER, CGC_TIMER_MASK,
CGC_MODE_RUN | CGC_MODE_SLEEP);
/* init tick & event timer first */
init_hw_timer(ITIM32, ITIM_SOURCE_CLOCK_APB2);
init_hw_timer(ITIM_EVENT_NO, ITIM_SOURCE_CLOCK_32K);
/* Set initial prescaler */
update_prescaler();
/*
* Override the count with the start value now that counting has
* started.
*/
hw_clock_source_set_preload(start_t, 1);
/* Enable interrupt of ITIM */
task_enable_irq(NPCX_IRQ_ITIM32);
return NPCX_IRQ_ITIM32;
}
static void i2c_init(void)
{
const struct i2c_port_t *p = i2c_ports;
int i;
for (i = 0; i < i2c_ports_used; i++, p++)
i2c_init_port(p);
#ifdef CONFIG_HOSTCMD_I2C_SLAVE_ADDR
STM32_I2C_CR1(I2C_PORT_EC) |= STM32_I2C_CR1_RXIE | STM32_I2C_CR1_ERRIE
| STM32_I2C_CR1_ADDRIE | STM32_I2C_CR1_STOPIE
| STM32_I2C_CR1_NACKIE;
#if defined(CONFIG_LOW_POWER_IDLE) && (I2C_PORT_EC == STM32_I2C1_PORT)
/*
* If using low power idle and EC port is I2C1, then set I2C1 to wake
* from STOP mode on address match. Note, this only works on I2C1 and
* only if the clock to I2C1 is HSI 8MHz.
*/
STM32_I2C_CR1(I2C_PORT_EC) |= STM32_I2C_CR1_WUPEN;
#endif
STM32_I2C_OAR1(I2C_PORT_EC) = 0x8000 | CONFIG_HOSTCMD_I2C_SLAVE_ADDR;
#ifdef TCPCI_I2C_SLAVE
/*
* Configure TCPC address with OA2[1] masked so that we respond
* to CONFIG_TCPC_I2C_BASE_ADDR and CONFIG_TCPC_I2C_BASE_ADDR + 2.
*/
STM32_I2C_OAR2(I2C_PORT_EC) = 0x8100 | CONFIG_TCPC_I2C_BASE_ADDR;
#endif
task_enable_irq(IRQ_SLAVE);
#endif
}
static void ext_timer_ctrl(enum ext_timer_sel ext_timer,
enum ext_timer_clock_source ext_timer_clock,
int start,
int with_int,
int32_t count)
{
uint8_t intc_mask;
/* rising-edge-triggered */
intc_mask = et_ctrl_regs[ext_timer].mask;
*et_ctrl_regs[ext_timer].mode |= intc_mask;
*et_ctrl_regs[ext_timer].polarity &= ~intc_mask;
/* clear interrupt status */
task_clear_pending_irq(et_ctrl_regs[ext_timer].irq);
/* These bits control the clock input source to the exttimer 3 - 8 */
IT83XX_ETWD_ETXPSR(ext_timer) = ext_timer_clock;
/* The count number of external timer n. */
IT83XX_ETWD_ETXCNTLR(ext_timer) = count;
ext_timer_stop(ext_timer, 0);
if (start)
ext_timer_start(ext_timer, 0);
if (with_int)
task_enable_irq(et_ctrl_regs[ext_timer].irq);
else
task_disable_irq(et_ctrl_regs[ext_timer].irq);
}
void lpc_keyboard_put_char(uint8_t chr, int send_irq)
{
/* Clear programming data bit 7-4 */
IT83XX_KBC_KBHISR &= 0x0F;
/* keyboard */
IT83XX_KBC_KBHISR |= 0x10;
/*
* bit0 = 0, The IRQ1 is controlled by the IRQ1B bit in KBIRQR.
* bit1 = 0, The IRQ12 is controlled by the IRQ12B bit in KBIRQR.
*/
IT83XX_KBC_KBHICR &= 0xFC;
/*
* Enable the interrupt to keyboard driver in the host processor
* via SERIRQ when the output buffer is full.
*/
if (send_irq)
IT83XX_KBC_KBHICR |= 0x01;
udelay(16);
task_clear_pending_irq(IT83XX_IRQ_KBC_OUT);
/* The data output to the KBC Data Output Register. */
IT83XX_KBC_KBHIKDOR = chr;
task_enable_irq(IT83XX_IRQ_KBC_OUT);
}
static int i2c_tran_write(int p)
{
struct i2c_port_data *pd = pdata + p;
if (pd->flags & I2C_XFER_START) {
/* i2c enable */
IT83XX_SMB_HOCTL2(p) = 0x13;
/*
* bit0, Direction of the host transfer.
* bit[1:7}, Address of the targeted slave.
*/
IT83XX_SMB_TRASLA(p) = pd->addr;
/* Send first byte */
IT83XX_SMB_HOBDB(p) = *(pd->out++);
pd->widx++;
/* clear start flag */
pd->flags &= ~I2C_XFER_START;
/*
* bit0, Host interrupt enable.
* bit[2:4}, Extend command.
* bit6, start.
*/
IT83XX_SMB_HOCTL(p) = 0x5D;
} else {
/* Host has completed the transmission of a byte */
if (IT83XX_SMB_HOSTA(p) & HOSTA_BDS) {
if (pd->widx < pd->out_size) {
/* Send next byte */
IT83XX_SMB_HOBDB(p) = *(pd->out++);
pd->widx++;
/* W/C byte done for next byte */
IT83XX_SMB_HOSTA(p) = HOSTA_NEXT_BYTE;
if (pd->i2ccs == I2C_CH_REPEAT_START) {
pd->i2ccs = I2C_CH_NORMAL;
task_enable_irq(i2c_ctrl_regs[p].irq);
}
} else {
/* done */
pd->out_size = 0;
if (pd->in_size > 0) {
/* write to read */
i2c_w2r_change_direction(p);
} else {
if (pd->flags & I2C_XFER_STOP) {
/* set I2C_EN = 0 */
IT83XX_SMB_HOCTL2(p) = 0x11;
/* W/C byte done for finish */
IT83XX_SMB_HOSTA(p) =
HOSTA_NEXT_BYTE;
} else {
pd->i2ccs = I2C_CH_REPEAT_START;
return 0;
}
}
}
}
}
return 1;
}
static void gpio_init(void)
{
int i;
/* Enable IRQs now that pins are set up */
for (i = 0; i < ARRAY_SIZE(gpio_irqs); i++)
task_enable_irq(gpio_irqs[i]);
}
void keyboard_raw_enable_interrupt(int enable)
{
if (enable) {
task_clear_pending_irq(MEC1322_IRQ_KSC_INT);
task_enable_irq(MEC1322_IRQ_KSC_INT);
} else {
task_disable_irq(MEC1322_IRQ_KSC_INT);
}
}
int __hw_clock_source_init(uint32_t start_t)
{
#ifdef BOARD_REI
/* reload_val = (0xFFFFFFFF / SECOND) * clock_get_freq(); */
/* reload_val = 0xFFFFFFFF; */
#endif /* defined(BOARD_REI) */
/*
* Use Timer 0 as the clock. The clock source for the timer block
* cannot be prescaled down to 1MHz, therefore, we'll have to handle the
* rollovers.
*
* There's also no match functionality, so set up an additional timer,
* Timer 1, to handle events.
*/
/* Disable the timers. */
ROTOR_MCU_TMR_TNCR(0) &= ~(1 << 0);
ROTOR_MCU_TMR_TNCR(1) &= ~(1 << 0);
/*
* Timer 0
*
* Unmask interrupt, set user-defined count mode, and disable PWM.
*/
ROTOR_MCU_TMR_TNCR(0) = (1 << 1);
/* Use the specified start timer value and start the timer. */
__hw_clock_source_set(start_t);
/*
* Timer 1
*
* Unmask interrupt, set user-defined count mode, and disable PWM.
*/
ROTOR_MCU_TMR_TNCR(1) = (1 << 1);
/* Enable interrupts. */
task_enable_irq(ROTOR_MCU_IRQ_TIMER_0);
task_enable_irq(ROTOR_MCU_IRQ_TIMER_1);
/* Return event timer IRQ number. */
return ROTOR_MCU_IRQ_TIMER_1;
}
void ext_timer_start(enum ext_timer_sel ext_timer, int en_irq)
{
/* enable external timer n */
IT83XX_ETWD_ETXCTRL(ext_timer) |= 0x03;
if (en_irq) {
task_clear_pending_irq(et_ctrl_regs[ext_timer].irq);
task_enable_irq(et_ctrl_regs[ext_timer].irq);
}
}
void dma_enable_tc_interrupt(enum dma_channel channel)
{
stm32_dma_chan_t *chan = dma_get_channel(channel);
/* Store task ID so the ISR knows which task to wake */
id[channel] = task_get_current();
chan->ccr |= STM32_DMA_CCR_TCIE;
task_enable_irq(dma_get_irq(channel));
}
int gpio_enable_interrupt(enum gpio_signal signal)
{
int irq = gpio_to_irq(gpio_list[signal].port, gpio_list[signal].mask);
if (irq == -1)
return EC_ERROR_UNKNOWN;
else
task_enable_irq(irq);
return EC_SUCCESS;
}
void dma_enable_tc_interrupt_callback(enum dma_channel stream,
void (*callback)(void *),
void *callback_data)
{
stm32_dma_stream_t *dma_stream = dma_get_channel(stream);
dma_irq[stream].cb = callback;
dma_irq[stream].cb_data = callback_data;
dma_stream->scr |= STM32_DMA_CCR_TCIE;
task_enable_irq(dma_get_irq(stream));
}
/* Put a char to host buffer and send IRQ if specified. */
void lpc_keyboard_put_char(uint8_t chr, int send_irq)
{
NPCX_HIKDO = chr;
CPRINTS("KB put %02x", chr);
/* Enable OBE interrupt to detect host read data out */
SET_BIT(NPCX_HICTRL, NPCX_HICTRL_OBECIE);
task_enable_irq(NPCX_IRQ_KBC_OBE);
if (send_irq) {
keyboard_irq_assert();
}
}
static void timers_init(void)
{
/* TIM2 is a 32-bit free running counter with 1Mhz frequency */
STM32_TIM_CR2(2) = 0x0000;
STM32_TIM32_ARR(2) = 0xFFFFFFFF;
STM32_TIM32_CNT(2) = 0;
STM32_TIM_PSC(2) = CPU_CLOCK / 1000000 - 1;
STM32_TIM_EGR(2) = 0x0001; /* Reload the pre-scaler */
STM32_TIM_CR1(2) = 1;
STM32_TIM_DIER(2) = 0;
task_enable_irq(STM32_IRQ_TIM2);
}
static void gpio_init(void)
{
/* Enable IRQs now that pins are set up */
task_enable_irq(STM32_IRQ_EXTI0);
task_enable_irq(STM32_IRQ_EXTI1);
task_enable_irq(STM32_IRQ_EXTI2);
task_enable_irq(STM32_IRQ_EXTI3);
task_enable_irq(STM32_IRQ_EXTI4);
task_enable_irq(STM32_IRQ_EXTI9_5);
task_enable_irq(STM32_IRQ_EXTI15_10);
}
static void lpc_send_response_packet(struct host_packet *pkt)
{
/* Ignore in-progress on LPC since interface is synchronous anyway */
if (pkt->driver_result == EC_RES_IN_PROGRESS)
return;
/* Write result to the data byte. This sets the TOH status bit. */
LPC_POOL_CMD[1] = pkt->driver_result;
/* Clear the busy bit, so the host knows the EC is done. */
task_disable_irq(LM4_IRQ_LPC);
LM4_LPC_ST(LPC_CH_CMD) &= ~LM4_LPC_ST_BUSY;
task_enable_irq(LM4_IRQ_LPC);
}
static void configure_port(int port, int kbps)
{
MEC1322_I2C_CTRL(port) = CTRL_PIN;
MEC1322_I2C_OWN_ADDR(port) = 0x0;
configure_port_speed(port, kbps);
MEC1322_I2C_CTRL(port) = CTRL_PIN | CTRL_ESO | CTRL_ACK | CTRL_ENI;
MEC1322_I2C_CONFIG(port) |= 1 << 10; /* ENAB */
/* Enable interrupt */
MEC1322_I2C_CONFIG(port) |= 1 << 29; /* ENIDI */
MEC1322_INT_ENABLE(12) |= (1 << port);
MEC1322_INT_BLK_EN |= 1 << 12;
task_enable_irq(MEC1322_IRQ_I2C_0 + port);
}
/* HWTimer event handlers */
void __hw_clock_event_set(uint32_t deadline)
{
fp_t inv_evt_tick = FLOAT_TO_FP(INT_32K_CLOCK/(float)SECOND);
int32_t evt_cnt_us;
/* Is deadline min value? */
if (evt_expired_us != 0 && evt_expired_us < deadline)
return;
/* mark min event value */
evt_expired_us = deadline;
evt_cnt_us = deadline - __hw_clock_source_read();
#if DEBUG_TMR
evt_cnt_us_dbg = deadline - __hw_clock_source_read();
#endif
/* Deadline is behind current timer */
if (evt_cnt_us < 0)
evt_cnt_us = 1;
/* Event module disable */
CLEAR_BIT(NPCX_ITCTS(ITIM_EVENT_NO), NPCX_ITCTS_ITEN);
/*
* ITIM count down : event expired : Unit: 1/32768 sec
* It must exceed evt_expired_us for process_timers function
*/
evt_cnt = FP_TO_INT((fp_inter_t)(evt_cnt_us) * inv_evt_tick);
if (evt_cnt > TICK_EVT_MAX_CNT) {
CPRINTS("Event overflow! 0x%08x, us is %d\r\n",
evt_cnt, evt_cnt_us);
evt_cnt = TICK_EVT_MAX_CNT;
}
/* Wait for module disable to take effect before updating count */
while (IS_BIT_SET(NPCX_ITCTS(ITIM_EVENT_NO), NPCX_ITCTS_ITEN))
;
NPCX_ITCNT16(ITIM_EVENT_NO) = MAX(evt_cnt, 1);
/* Event module enable */
SET_BIT(NPCX_ITCTS(ITIM_EVENT_NO), NPCX_ITCTS_ITEN);
/* Wait for module enable */
while (!IS_BIT_SET(NPCX_ITCTS(ITIM_EVENT_NO), NPCX_ITCTS_ITEN))
;
/* Enable interrupt of ITIM */
task_enable_irq(ITIM16_INT(ITIM_EVENT_NO));
}
void __hw_clock_event_set(uint32_t deadline)
{
uint32_t wait;
/* bit0, disable event timer */
IT83XX_ETWD_ETXCTRL(EVENT_EXT_TIMER) &= ~(1 << 0);
/* w/c interrupt status */
event_timer_clear_pending_isr();
/* microseconds to timer counter */
wait = deadline - __hw_clock_source_read();
IT83XX_ETWD_ETXCNTLR(EVENT_EXT_TIMER) =
wait < EVENT_TIMER_COUNT_TO_US(0xffffffff) ?
EVENT_TIMER_US_TO_COUNT(wait) : 0xffffffff;
/* enable and re-start timer */
IT83XX_ETWD_ETXCTRL(EVENT_EXT_TIMER) |= 0x03;
task_enable_irq(et_ctrl_regs[EVENT_EXT_TIMER].irq);
}
static void usart_variant_enable(struct usart_config const *config)
{
configs[config->hw->index] = config;
/*
* All three USARTS are clocked from the HSI(8MHz) source. This is
* done because the clock sources elsewhere are setup so that the result
* of clock_get_freq() is not the input clock frequency to the USARTs
* baud rate divisors.
*/
STM32_RCC_CFGR3 |= 0x000f0003;
usart_set_baud_f0_l(config, 8000000);
task_enable_irq(config->hw->irq);
}
void lpc_keyboard_resume_irq(void)
{
if (lpc_keyboard_has_char()) {
/* The IRQ1 is controlled by the IRQ1B bit in KBIRQR. */
IT83XX_KBC_KBHICR &= ~0x01;
/*
* When the OBFKIE bit in KBC Host Interface Control Register
* (KBHICR) is 0, the bit directly controls the IRQ1 signal.
*/
IT83XX_KBC_KBIRQR |= 0x01;
task_clear_pending_irq(IT83XX_IRQ_KBC_OUT);
task_enable_irq(IT83XX_IRQ_KBC_OUT);
}
}
static void usart_variant_enable(struct usart_config const *config)
{
/* Use single-bit sampling */
STM32_USART_CR3(config->hw->base) |= STM32_USART_CR3_ONEBIT;
/*
* Make sure we register this config before enabling the HW.
* If we did it the other way around the FREQ_CHANGE hook could be
* called before we update the configs array and we would miss the
* clock frequency change event, leaving our baud rate divisor wrong.
*/
configs[config->hw->index] = config;
usart_set_baud_f0_l(config, clock_get_freq());
task_enable_irq(config->hw->irq);
}