npcx7: WoV: Add support for Wake-on-Voice (WoV) module

This CL adds the driver support for the WoV module which inludes the
following files:
  - wov.c
  - wov_chip.h
  - apm.c
  - apm_chip.h
It also supports the console commad "wov" which can test different
configuration and audio quality by entering different parameters.

The detail description of WoV console command is listed below:
------------------------------------------------------------------------
 [Note]: Before changing any of settings, please make sure the operation
 mode is on the "OFF" state. (ie. run the command wov cfgmod off
 first) .

 > wov init
 Initialize WoV interface, including pin mux and interrupt
 registration etc.

 > wov mute <enable / disable >
 mute enable / disable.

 > wov cfgsrc  <mono | stereo | left | right>
 set audio source, ex: wov cfgsrc left, means audio source from left
 MIC.

 > wov cfgbis  <16|18|20|24>
 set audio resolution, ex: wov cfgbit 16 means audio resolution are
 16bits.

 > wov cfgsfs  <8000|12000|16000|24000|32000|48000>
 set audio sampling frequency rate, ex: wov cfgsfs 48000 means audio
 sampling rate are 48Khz.

 > wov cfgbck  <32fs|48fs|64fs|128fs|256fs>
 set I2S bit clock rate, ex: wov cfgsfs 48000 and wov cfgbck 32fs
 means audio sampling rate are 1536Khz (32*48000).

 > wov cfgfmt  <i2s|right|left|pcma|pcmb|tdm>
 set I2S but format, ex: wov cfgfmt right means audio I2S format are
 Right-Justify.

 > wov cfgmod  <off|vad|ram|i2s|rami2s>
 set audio operation mode ,ex: wov cfgmod i2s means audio output via
 I2S bus.

 > wov cfgtdm  <0~496 0~496 0~3>
 set TDM time slot, the first values is left channel delay counter,
 the second is right channel, and the 3rd is startup counting condition.
 (chosen LRCK raising or falling edge) .
 [Note: this command is just working on cfgmod equal to tdm]

 > wov cfgget
  retrieve above settings.

 > wov vadsens
 (currently not support, reserve for next version)

 > wov gain (0~31)
 set audio data gain value, ex: wov gain 10 means setting audio digital
 gain are 10dB.

 > wov cfgdck <1.0 | 2.4 | 3.0 >
 set digital MIC PDM clock rate. ex: wov cfgdck 2.4 means PDM clock
 are 2.4Mhz.

-----------------------------------------------------------------------

This CL also adds the chip ID (0x24) for npcx7m7w. So the console
command "version" can show the chip is npcx7m7w.

BRANCH=none
BUG=none
TEST=No build errors for make buildall.
TEST="BOARD=npcx7_evb make"; Flash the image on EVB; Test WoV function
with console commands described above.

Change-Id: Ief2b3e89edbd3e6d2a9d82d317a93c9f0b7a20cd
Signed-off-by: Dror Goldstein <dror.goldstein@nuvoton.com>
Signed-off-by: Simon Liang <CMLiang@nuvoton.com>
Signed-off-by: CHLin <CHLIN56@nuvoton.com>
Reviewed-on: https://chromium-review.googlesource.com/897314
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: CH Lin <chlin56@nuvoton.com>
Reviewed-by: Scott Collyer <scollyer@chromium.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/board/npcx7_evb/gpio.inc b/board/npcx7_evb/gpio.inc
index 2fe60c5b71..2acec02f09 100644
--- a/board/npcx7_evb/gpio.inc
+++ b/board/npcx7_evb/gpio.inc
@@ -100,3 +100,9 @@ ALTERNATE(PIN_MASK(3, 0x03), 0, MODULE_KEYBOARD_SCAN, 0)
 ALTERNATE(PIN_MASK(D, 0x04), 1,  MODULE_PMU, 0) /* PSL_IN1     GPIOD2 */
 ALTERNATE(PIN_MASK(0, 0x07), 1,  MODULE_PMU, 0) /* PSL_IN2/3/4 GPIO00/01/02 */
 #endif
+
+#ifdef CONFIG_WAKE_ON_VOICE
+ALTERNATE(PIN_MASK(A, 0xA0), 1,  MODULE_WOV, 0) /* I2S_SYNC/I2S_SCLK  GPIOA5/A7 */
+ALTERNATE(PIN_MASK(B, 0x01), 1,  MODULE_WOV, 0) /* I2S_SDAT           GPIOB0    */
+ALTERNATE(PIN_MASK(9, 0x90), 1,  MODULE_WOV, 0) /* DMIC_CLK/DMIC_IN   GPIO94/97 */
+#endif