1 files changed, 132 insertions, 0 deletions
diff --git a/tools/proxyclient/experiments/audio_capture.py b/tools/proxyclient/experiments/audio_capture.py
new file mode 100755
index 0000000..d79cbd4
--- /dev/null
+++ b/tools/proxyclient/experiments/audio_capture.py
@@ -0,0 +1,132 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: MIT
+import sys, pathlib
+import time
+sys.path.append(str(pathlib.Path(__file__).resolve().parents[1]))
+
+# audio_capture.py -- capture audio on jack microphone input (on M1 macs with cs42l83)
+#
+# sample usage with sox: (recoding can be loud!)
+#
+#  ./audio_capture.py | sox -t raw -r 48000 -c 1 -e signed-int -b 32 -L - OUTPUT_FILE
+
+from m1n1.setup import *
+from m1n1.hw.dart import DART, DARTRegs
+from m1n1.hw.i2c import I2C
+from m1n1.hw.pmgr import PMGR
+from m1n1.hw.nco import NCO
+from m1n1.hw.admac import *
+from m1n1.hw.mca import *
+
+p.pmgr_adt_clocks_enable("/arm-io/i2c2")
+p.pmgr_adt_clocks_enable("/arm-io/admac-sio")
+p.pmgr_adt_clocks_enable("/arm-io/dart-sio")
+p.pmgr_adt_clocks_enable("/arm-io/mca-switch")
+p.pmgr_adt_clocks_enable("/arm-io/mca3")
+
+# reset AUDIO_P
+PS_AUDIO_P = PMGR(u).regs[0].PS4[10]
+PS_AUDIO_P.set(DEV_DISABLE=1)
+PS_AUDIO_P.set(RESET=1)
+PS_AUDIO_P.set(RESET=0)
+PS_AUDIO_P.set(DEV_DISABLE=0)
+
+dart_base, _ = u.adt["/arm-io/dart-sio"].get_reg(0)
+dart = DART(iface, DARTRegs(u, dart_base), util=u)
+dart.initialize()
+
+cl_no = 2
+
+admac = ADMAC(u, "/arm-io/admac-sio", dart, debug=True)
+dmachan = admac.chans[4*cl_no+1]
+dmachan.buswidth = E_BUSWIDTH.W_32BIT
+dmachan.framesize = E_FRAME.F_1_WORD
+
+nco = NCO(u, "/arm-io/nco")
+nco[cl_no].set_rate(6000000)
+nco[cl_no].enable()
+
+mca_switch1_base = u.adt["/arm-io/mca-switch"].get_reg(1)[0]
+mca_cl_base = u.adt["/arm-io/mca-switch"].get_reg(0)[0] + 0x4000*cl_no
+cl = MCACluster(u, mca_cl_base)
+
+regs, serdes = cl.regs, cl.rxa
+
+regs.SYNCGEN_STATUS.set(EN=0)
+regs.SYNCGEN_MCLK_SEL.val =(1 + cl_no)
+regs.SYNCGEN_HI_PERIOD.val = 0    # period minus one
+regs.SYNCGEN_LO_PERIOD.val = 0x7b # period minus one
+
+serdes.STATUS.set(EN=0)
+serdes.CONF.set(
+	NSLOTS=0,
+	SLOT_WIDTH=E_SLOT_WIDTH.W_32BIT,
+	BCLK_POL=1,
+	UNK1=1, UNK2=1,
+	SYNC_SEL=(1 + cl_no)
+)
+serdes.UNK1.val = 0x4
+
+serdes.BITDELAY.val = 1
+
+serdes.CHANMASK[0].val = 0xffff_ffff
+serdes.CHANMASK[1].val = 0xffff_fffe
+
+regs.PORT_ENABLES.set(CLOCK1=1, CLOCK2=1, DATA=0)
+regs.PORT_CLK_SEL.set(SEL=(cl_no + 1))
+regs.MCLK_STATUS.set(EN=1)
+regs.SYNCGEN_STATUS.set(EN=1)
+
+cs42l_addr = 0x48
+i2c2 = I2C(u, "/arm-io/i2c2")
+def cs42l_write(regaddr, val):
+	i2c2.write_reg(cs42l_addr, 0x0, [regaddr >> 8])
+	i2c2.write_reg(cs42l_addr, regaddr & 0xff, [val])
+
+p.write32(0x23d1f002c, 0x76a02)
+p.write32(0x23d1f002c, 0x76a03) # take jack codec out of reset
+
+cs42l_write(0x1009, 0x0)  # FS_int = MCLK/250
+cs42l_write(0x1101, 0x7a) # power on
+cs42l_write(0x1103, 0x22) # power on ring sense
+cs42l_write(0x1107, 0x1)  # SCLK present
+cs42l_write(0x1121, 0xa6) # Headset Switch Control
+cs42l_write(0x1129, 0x1)  # Headset Clamp Disable
+cs42l_write(0x1205, 0x7c) # FSYNC period
+cs42l_write(0x1207, 0x20) # ASP Clock Configuration
+cs42l_write(0x1208, 0x12) # BITDELAY = 1
+cs42l_write(0x120c, 0x1)  # SCLK_PREDIV = div-by-2
+cs42l_write(0x150a, 0x55) # PLL
+cs42l_write(0x151b, 0x1)  # PLL
+cs42l_write(0x1501, 0x1)  # power on PLL
+cs42l_write(0x1b70, 0xc3) # HSBIAS sense
+cs42l_write(0x1b71, 0xe0) # v-- headset 
+cs42l_write(0x1b73, 0xc0)
+cs42l_write(0x1b74, 0x1f)
+cs42l_write(0x1b75, 0xb6)
+cs42l_write(0x1b76, 0x8f)
+cs42l_write(0x1b79, 0x0)
+cs42l_write(0x1b7a, 0xfc)
+cs42l_write(0x1c03, 0xc0) # HSBIAS
+cs42l_write(0x2506, 0xc)  # ASP TX samp. rate
+cs42l_write(0x2609, 0x4c) # SRC output samp. rate
+cs42l_write(0x2901, 0x1)  # ASP TX enable & size
+cs42l_write(0x2902, 0x1)  # ASP TX channel enable
+
+time.sleep(0.01)
+
+cs42l_write(0x1201, 0x1) # transition to PLL clock
+
+# drain garbled samples (why are they garbled? i am not sure)
+time.sleep(0.5)
+
+dmachan.submit(buflen=0x4000)
+dmachan.enable()
+
+p.write32(mca_switch1_base + 0x8000*cl_no, 0x24800)
+serdes.STATUS.set(EN=1)
+
+while True:
+	while dmachan.can_submit():
+		dmachan.submit(buflen=0x4000)
+	sys.stdout.buffer.write(dmachan.poll())