diff options
Diffstat (limited to 'fw/fe310/eos/soc/i2s.c')
| -rw-r--r-- | fw/fe310/eos/soc/i2s.c | 392 |
1 files changed, 392 insertions, 0 deletions
diff --git a/fw/fe310/eos/soc/i2s.c b/fw/fe310/eos/soc/i2s.c new file mode 100644 index 0000000..5e5eaa7 --- /dev/null +++ b/fw/fe310/eos/soc/i2s.c @@ -0,0 +1,392 @@ +#include <stdlib.h> +#include <stdint.h> + +#include "encoding.h" +#include "platform.h" +#include "prci_driver.h" + +#include "eos.h" +#include "interrupt.h" +#include "event.h" + +#include "board.h" + +#include "i2s.h" +#include "i2s_priv.h" + +#define I2S_REG_CK(o) _REG32(I2S_CTRL_ADDR_CK, o) +#define I2S_REG_WS_MIC(o) _REG32(I2S_CTRL_ADDR_WS_MIC, o) +#define I2S_REG_WS_SPK(o) _REG32(I2S_CTRL_ADDR_WS_SPK, o) + +#define I2S_PIN_PWM ((1 << I2S_PIN_CK) | (1 << I2S_PIN_CK_SW) | (1 << I2S_PIN_WS_MIC) | (1 << I2S_PIN_WS_SPK)) + +#define MIN(X, Y) (((X) < (Y)) ? (X) : (Y)) +#define MAX(X, Y) (((X) > (Y)) ? (X) : (Y)) + +#define EOS_ABUF_IDX_MASK(IDX, SIZE) ((IDX) & ((SIZE) - 1)) + +EOSABuf _eos_i2s_mic_buf; +EOSABuf _eos_i2s_spk_buf; +uint32_t _eos_i2s_fmt = 0; +uint32_t _eos_i2s_mic_wm = 0; +uint32_t _eos_i2s_spk_wm = 0; +uint32_t _eos_i2s_mic_evt_enable = 0; +uint32_t _eos_i2s_spk_evt_enable = 0; + +static eos_i2s_handler_t i2s_spk_handler = NULL; +static eos_i2s_handler_t i2s_mic_handler = NULL; +static uint32_t i2s_clk_period; +static uint8_t i2s_mic_volume = 0; /* 0 - 8 */ +static uint8_t i2s_spk_volume = 16; /* 0 - 16 */ + +static void _abuf_init(EOSABuf *buf, uint8_t *array, uint16_t size) { + buf->idx_r = 0; + buf->idx_w = 0; + buf->size = size; + buf->array = array; +} + +static int _abuf_push8(EOSABuf *buf, uint8_t sample) { + if ((uint16_t)(buf->idx_w - buf->idx_r) == buf->size) return EOS_ERR_FULL; + + buf->array[EOS_ABUF_IDX_MASK(buf->idx_w, buf->size)] = sample; + buf->idx_w++; + return EOS_OK; +} + +static int _abuf_push16(EOSABuf *buf, uint16_t sample) { + if ((uint16_t)(buf->idx_w - buf->idx_r) == buf->size) return EOS_ERR_FULL; + + buf->array[EOS_ABUF_IDX_MASK(buf->idx_w, buf->size)] = sample >> 8; + buf->array[EOS_ABUF_IDX_MASK(buf->idx_w + 1, buf->size)] = sample & 0xFF; + buf->idx_w += 2; + return EOS_OK; +} + +static int _abuf_pop8(EOSABuf *buf, uint8_t *sample) { + if (buf->idx_r == buf->idx_w) { + return EOS_ERR_EMPTY; + } else { + *sample = buf->array[EOS_ABUF_IDX_MASK(buf->idx_r, buf->size)]; + buf->idx_r++; + return EOS_OK; + } +} + +static int _abuf_pop16(EOSABuf *buf, uint16_t *sample) { + if (buf->idx_r == buf->idx_w) { + return EOS_ERR_EMPTY; + } else { + *sample = buf->array[EOS_ABUF_IDX_MASK(buf->idx_r, buf->size)] << 8; + *sample |= buf->array[EOS_ABUF_IDX_MASK(buf->idx_r + 1, buf->size)]; + buf->idx_r += 2; + return EOS_OK; + } +} + + +static void _abuf_flush(EOSABuf *buf) { + buf->idx_r = 0; + buf->idx_w = 0; +} + +static uint16_t _abuf_len(EOSABuf *buf) { + return buf->idx_w - buf->idx_r; +} + +static void i2s_handle_evt(unsigned char type, unsigned char *buffer, uint16_t len) { + switch(type & ~EOS_EVT_MASK) { + case EOS_I2S_ETYPE_MIC: + if (i2s_mic_handler) i2s_mic_handler(type); + clear_csr(mstatus, MSTATUS_MIE); + _eos_i2s_mic_evt_enable = 1; + set_csr(mstatus, MSTATUS_MIE); + break; + case EOS_I2S_ETYPE_SPK: + if (i2s_spk_handler) i2s_spk_handler(type); + clear_csr(mstatus, MSTATUS_MIE); + _eos_i2s_spk_evt_enable = 1; + set_csr(mstatus, MSTATUS_MIE); + break; + default: + eos_evtq_bad_handler(type, buffer, len); + break; + } +} + +static void _mic_vol_set(uint8_t vol) { + I2S_REG_WS_MIC(PWM_CMP2) = i2s_clk_period * (vol + 1); + I2S_REG_WS_MIC(PWM_CMP3) = I2S_REG_WS_MIC(PWM_CMP2) + i2s_clk_period * 16; +} + +static void _spk_vol_set(uint8_t vol) { + int spk_cmp = vol + i2s_mic_volume - 16; + + if (spk_cmp <= 0) { + I2S_REG_WS_SPK(PWM_CMP1) = i2s_clk_period * (32 + spk_cmp); + I2S_REG_WS_SPK(PWM_CMP2) = i2s_clk_period * (64 + spk_cmp); + I2S_REG_WS_SPK(PWM_CMP3) = i2s_clk_period * 33; + GPIO_REG(GPIO_OUTPUT_XOR) &= ~(1 << I2S_PIN_WS_SPK); + } else { + I2S_REG_WS_SPK(PWM_CMP1) = i2s_clk_period * spk_cmp; + I2S_REG_WS_SPK(PWM_CMP2) = i2s_clk_period * (32 + spk_cmp); + I2S_REG_WS_SPK(PWM_CMP3) = i2s_clk_period * (33 + spk_cmp); + GPIO_REG(GPIO_OUTPUT_XOR) |= (1 << I2S_PIN_WS_SPK); + } +} + +extern void _eos_i2s_start_pwm(void); + +int eos_i2s_init(uint8_t wakeup_cause) { + eos_evtq_set_handler(EOS_EVT_I2S, i2s_handle_evt); + + eos_i2s_init_mux(); + + GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << I2S_PIN_CK_SW); + GPIO_REG(GPIO_OUTPUT_VAL) &= ~(1 << I2S_PIN_CK_SR); + + GPIO_REG(GPIO_INPUT_EN) &= ~(1 << I2S_PIN_CK_SW); + GPIO_REG(GPIO_OUTPUT_EN) |= (1 << I2S_PIN_CK_SW); + + GPIO_REG(GPIO_INPUT_EN) &= ~(1 << I2S_PIN_CK_SR); + GPIO_REG(GPIO_OUTPUT_EN) |= (1 << I2S_PIN_CK_SR); + + return EOS_OK; +} + +void eos_i2s_init_mux(void) { + GPIO_REG(GPIO_OUTPUT_VAL) &= ~((1 << I2S_PIN_CK) | (1 << I2S_PIN_WS_MIC) | (1 << I2S_PIN_WS_SPK)); + + GPIO_REG(GPIO_INPUT_EN) &= ~(1 << I2S_PIN_CK); + GPIO_REG(GPIO_OUTPUT_EN) |= (1 << I2S_PIN_CK); + + GPIO_REG(GPIO_INPUT_EN) &= ~(1 << I2S_PIN_WS_MIC); + GPIO_REG(GPIO_OUTPUT_EN) |= (1 << I2S_PIN_WS_MIC); + + GPIO_REG(GPIO_INPUT_EN) &= ~(1 << I2S_PIN_WS_SPK); + GPIO_REG(GPIO_OUTPUT_EN) |= (1 << I2S_PIN_WS_SPK); + + GPIO_REG(GPIO_INPUT_EN) |= (1 << I2S_PIN_SD_IN); + GPIO_REG(GPIO_OUTPUT_EN) &= ~(1 << I2S_PIN_SD_IN); + + GPIO_REG(GPIO_INPUT_EN) &= ~(1 << I2S_PIN_SD_OUT); + GPIO_REG(GPIO_OUTPUT_EN) &= ~(1 << I2S_PIN_SD_OUT); +} + +void eos_i2s_start(uint32_t sample_rate, unsigned char fmt) { + i2s_clk_period = ((PRCI_get_cpu_freq() / (sample_rate * 64)) & ~I2S_PWM_SCALE_CK_MASK) + 1; + + GPIO_REG(GPIO_INPUT_EN) |= (1 << I2S_PIN_SD_IN); + GPIO_REG(GPIO_OUTPUT_EN) &= ~(1 << I2S_PIN_SD_IN); + + GPIO_REG(GPIO_INPUT_EN) &= ~(1 << I2S_PIN_SD_OUT); + GPIO_REG(GPIO_OUTPUT_EN) &= ~(1 << I2S_PIN_SD_OUT); + + I2S_REG_CK(PWM_CMP0) = i2s_clk_period >> I2S_PWM_SCALE_CK; + I2S_REG_CK(PWM_CMP1) = I2S_REG_CK(PWM_CMP0) / 2; + I2S_REG_CK(PWM_CMP2) = 0; + I2S_REG_CK(PWM_CMP3) = 0; + + I2S_REG_WS_MIC(PWM_CMP0) = i2s_clk_period * 64 - 1; + I2S_REG_WS_MIC(PWM_CMP1) = i2s_clk_period * 32; + _mic_vol_set(i2s_mic_volume); + + I2S_REG_WS_SPK(PWM_CMP0) = i2s_clk_period * 64 - 1; + _spk_vol_set(i2s_spk_volume); + + I2S_REG_CK(PWM_COUNT) = 0; + I2S_REG_WS_MIC(PWM_COUNT) = 0; + I2S_REG_WS_SPK(PWM_COUNT) = i2s_clk_period / 2; + + _eos_i2s_fmt = fmt; + _eos_i2s_mic_evt_enable = 1; + _eos_i2s_spk_evt_enable = 1; + + eos_intr_set_priority(I2S_IRQ_WS_ID, IRQ_PRIORITY_I2S_WS); + eos_intr_set_priority(I2S_IRQ_SD_ID, 0); + eos_intr_enable(I2S_IRQ_WS_ID); + eos_intr_enable(I2S_IRQ_SD_ID); + + _eos_i2s_start_pwm(); + /* + I2S_REG_CK(PWM_CFG) = PWM_CFG_ENALWAYS | PWM_CFG_ZEROCMP | I2S_PWM_SCALE_CK; + I2S_REG_WS_MIC(PWM_CFG) = PWM_CFG_ENALWAYS | PWM_CFG_ZEROCMP | PWM_CFG_CMP2GANG; + I2S_REG_WS_SPK(PWM_CFG) = PWM_CFG_ENALWAYS | PWM_CFG_ZEROCMP | PWM_CFG_CMP1GANG; + */ + + GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << I2S_PIN_CK_SR); + GPIO_REG(GPIO_IOF_SEL) |= I2S_PIN_PWM; + GPIO_REG(GPIO_IOF_EN) |= I2S_PIN_PWM; +} + +void eos_i2s_stop(void) { + I2S_REG_CK(PWM_CFG) = 0; + I2S_REG_WS_MIC(PWM_CFG) = 0; + I2S_REG_WS_SPK(PWM_CFG) = 0; + I2S_REG_CK(PWM_COUNT) = 0; + I2S_REG_WS_MIC(PWM_COUNT) = 0; + I2S_REG_WS_SPK(PWM_COUNT) = 0; + + _eos_i2s_mic_evt_enable = 0; + _eos_i2s_spk_evt_enable = 0; + eos_intr_set_priority(I2S_IRQ_WS_ID, 0); + eos_intr_set_priority(I2S_IRQ_SD_ID, 0); + eos_intr_disable(I2S_IRQ_WS_ID); + eos_intr_disable(I2S_IRQ_SD_ID); + + GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << I2S_PIN_CK_SW); + GPIO_REG(GPIO_OUTPUT_VAL) &= ~(1 << I2S_PIN_CK_SR); + + GPIO_REG(GPIO_OUTPUT_XOR) &= ~(1 << I2S_PIN_WS_SPK); + GPIO_REG(GPIO_IOF_EN) &= ~I2S_PIN_PWM; +} + +int eos_i2s_running(void) { + return !!(GPIO_REG(GPIO_IOF_EN) & I2S_PIN_PWM); +} + +void eos_i2s_mic_init(uint8_t *mic_arr, uint16_t mic_arr_size) { + clear_csr(mstatus, MSTATUS_MIE); + _abuf_init(&_eos_i2s_mic_buf, mic_arr, mic_arr_size); + set_csr(mstatus, MSTATUS_MIE); +} + +void eos_i2s_mic_set_handler(eos_i2s_handler_t wm_handler) { + clear_csr(mstatus, MSTATUS_MIE); + i2s_mic_handler = wm_handler; + set_csr(mstatus, MSTATUS_MIE); +} + +void eos_i2s_mic_set_wm(uint16_t wm) { + clear_csr(mstatus, MSTATUS_MIE); + _eos_i2s_mic_wm = wm; + set_csr(mstatus, MSTATUS_MIE); + +} + +uint16_t eos_i2s_mic_len(void) { + clear_csr(mstatus, MSTATUS_MIE); + uint16_t ret = _abuf_len(&_eos_i2s_mic_buf); + set_csr(mstatus, MSTATUS_MIE); + return ret; +} + +uint16_t eos_i2s_mic_read(uint8_t *sample, uint16_t ssize) { + uint16_t i; + uint16_t _ssize = 0; + + clear_csr(mstatus, MSTATUS_MIE); + _ssize = MIN(ssize, _abuf_len(&_eos_i2s_mic_buf)); + set_csr(mstatus, MSTATUS_MIE); + + for (i=0; i<_ssize; i++) { + sample[i] = _eos_i2s_mic_buf.array[EOS_ABUF_IDX_MASK(_eos_i2s_mic_buf.idx_r + i, _eos_i2s_mic_buf.size)]; + } + + clear_csr(mstatus, MSTATUS_MIE); + _eos_i2s_mic_buf.idx_r += _ssize; + set_csr(mstatus, MSTATUS_MIE); + + return _ssize; +} + +int eos_i2s_mic_pop8(uint8_t *sample) { + clear_csr(mstatus, MSTATUS_MIE); + int ret = _abuf_pop8(&_eos_i2s_mic_buf, sample); + set_csr(mstatus, MSTATUS_MIE); + return ret; +} + +int eos_i2s_mic_pop16(uint16_t *sample) { + clear_csr(mstatus, MSTATUS_MIE); + int ret = _abuf_pop16(&_eos_i2s_mic_buf, sample); + set_csr(mstatus, MSTATUS_MIE); + return ret; +} + +int eos_i2s_mic_vol_get(void) { + return i2s_mic_volume; +} + +void eos_i2s_mic_vol_set(int vol) { + if ((vol < 0) || (vol > 8)) return; + + i2s_mic_volume = vol; + + clear_csr(mstatus, MSTATUS_MIE); + _mic_vol_set(vol); + _spk_vol_set(i2s_spk_volume); + set_csr(mstatus, MSTATUS_MIE); +} + +void eos_i2s_spk_init(uint8_t *spk_arr, uint16_t spk_arr_size) { + clear_csr(mstatus, MSTATUS_MIE); + _abuf_init(&_eos_i2s_spk_buf, spk_arr, spk_arr_size); + set_csr(mstatus, MSTATUS_MIE); +} + +void eos_i2s_spk_set_handler(eos_i2s_handler_t wm_handler) { + clear_csr(mstatus, MSTATUS_MIE); + i2s_spk_handler = wm_handler; + set_csr(mstatus, MSTATUS_MIE); +} + +void eos_i2s_spk_set_wm(uint16_t wm) { + clear_csr(mstatus, MSTATUS_MIE); + _eos_i2s_spk_wm = wm; + set_csr(mstatus, MSTATUS_MIE); +} + +uint16_t eos_i2s_spk_len(void) { + clear_csr(mstatus, MSTATUS_MIE); + uint16_t ret = _abuf_len(&_eos_i2s_spk_buf); + set_csr(mstatus, MSTATUS_MIE); + return ret; +} + +uint16_t eos_i2s_spk_write(uint8_t *sample, uint16_t ssize) { + uint16_t i; + uint16_t _ssize = 0; + + clear_csr(mstatus, MSTATUS_MIE); + _ssize = MIN(ssize, _eos_i2s_spk_buf.size - _abuf_len(&_eos_i2s_spk_buf)); + set_csr(mstatus, MSTATUS_MIE); + + for (i=0; i<_ssize; i++) { + _eos_i2s_spk_buf.array[EOS_ABUF_IDX_MASK(_eos_i2s_spk_buf.idx_w + i, _eos_i2s_spk_buf.size)] = sample[i]; + } + + clear_csr(mstatus, MSTATUS_MIE); + _eos_i2s_spk_buf.idx_w += _ssize; + set_csr(mstatus, MSTATUS_MIE); + + return _ssize; +} + +int eos_i2s_spk_push8(uint8_t sample) { + clear_csr(mstatus, MSTATUS_MIE); + int ret = _abuf_push8(&_eos_i2s_spk_buf, sample); + set_csr(mstatus, MSTATUS_MIE); + return ret; +} + +int eos_i2s_spk_push16(uint16_t sample) { + clear_csr(mstatus, MSTATUS_MIE); + int ret = _abuf_push16(&_eos_i2s_spk_buf, sample); + set_csr(mstatus, MSTATUS_MIE); + return ret; +} + +int eos_i2s_spk_vol_get(void) { + return i2s_spk_volume; +} + +void eos_i2s_spk_vol_set(int vol) { + if ((vol < 0) || (vol > 16)) return; + + i2s_spk_volume = vol; + + clear_csr(mstatus, MSTATUS_MIE); + _spk_vol_set(vol); + set_csr(mstatus, MSTATUS_MIE); +} |