add m1n1HEADmaster

1 files changed, 148 insertions, 0 deletions

diff --git a/tools/proxyclient/experiments/speaker_amp.py b/tools/proxyclient/experiments/speaker_amp.py
new file mode 100755
index 0000000..7a592c3
--- /dev/null
+++ b/tools/proxyclient/experiments/speaker_amp.py
@@ -0,0 +1,148 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: MIT
+import sys, pathlib
+import time
+sys.path.append(str(pathlib.Path(__file__).resolve().parents[1]))
+
+# speaker_amp.py -- play audio through the embedded speaker on Mac mini
+#
+# sample usage with sox:
+#
+#   sox INPUT_FILE -t raw -r 48000 -c 1 -e signed-int -b 32 -L - gain -63 | python3 ./speaker_amp.py
+#
+# (expects mono, 24-bit signed samples padded to 32 bits on the msb side)
+
+import argparse
+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 *
+
+argparser = argparse.ArgumentParser()
+argparser.add_argument("-f", "--file", "--input", "--samples",
+                       type=str, default=None,
+                       help='input filename to take samples from ' \
+                            '(default: standard input)')
+argparser.add_argument("-b", "--bufsize", type=int, default=1024*32,
+                       help='size of buffers to keep submitting to DMA')
+args = argparser.parse_args()
+
+inputf = open(args.file, "rb") if args.file is not None \
+            else sys.stdin.buffer 
+
+p.pmgr_adt_clocks_enable("/arm-io/i2c1")
+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")
+
+# reset AUDIO_P
+PS_AUDIO_P = PMGR(u).regs[0].PS4[5]
+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)
+
+i2c1 = I2C(u, "/arm-io/i2c1")
+
+dart_base, _ = u.adt["/arm-io/dart-sio"].get_reg(0) # stream index 2
+dart = DART(iface, DARTRegs(u, dart_base), util=u)
+dart.initialize()
+
+cl_no = 0
+
+admac = ADMAC(u, "/arm-io/admac-sio", dart, debug=True)
+tx_chan = admac.chans[4*cl_no]
+
+tx_chan.disable()
+tx_chan.reset()
+tx_chan.read_reports() # read stale reports
+tx_chan.buswidth = E_BUSWIDTH.W_32BIT
+tx_chan.framesize = E_FRAME.F_1_WORD
+
+nco = NCO(u, "/arm-io/nco")
+nco[cl_no].set_rate(48000 * 256)
+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.txa
+
+regs.SYNCGEN_STATUS.set(RST=1, EN=0)
+regs.SYNCGEN_STATUS.set(RST=0)
+regs.SYNCGEN_MCLK_SEL.val =(1 + cl_no)
+regs.SYNCGEN_HI_PERIOD.val = 0
+regs.SYNCGEN_LO_PERIOD.val = 0xfe  # full period minus two
+
+serdes.STATUS.set(EN=0)
+serdes.CONF.set(
+    NSLOTS=0,
+    SLOT_WIDTH=E_SLOT_WIDTH.W_32BIT,
+    BCLK_POL=1,
+    UNK1=1, UNK2=1,
+    IDLE_UNDRIVEN=1,
+    SYNC_SEL=(1 + cl_no)
+)
+serdes.BITDELAY.val = 0
+
+serdes.CHANMASK[0].val = 0xffff_fffe
+serdes.CHANMASK[1].val = 0xffff_fffe
+
+regs.PORT_ENABLES.set(CLOCK1=1, CLOCK2=1, DATA=1)
+regs.PORT_CLK_SEL.set(SEL=(cl_no + 1))
+regs.PORT_DATA_SEL.val = cl_no + 1
+regs.MCLK_STATUS.set(EN=1)
+regs.SYNCGEN_STATUS.set(EN=1)
+
+p.write32(mca_switch1_base + 0x8000*cl_no, 0x102048)
+
+# toggle the GPIO line driving the speaker-amp IC reset
+p.write32(0x23c1002d4, 0x76a02) # invoke reset
+p.write32(0x23c1002d4, 0x76a03) # take out of reset
+
+tx_chan.submit(inputf.read(args.bufsize))
+tx_chan.enable()
+while tx_chan.can_submit():
+    tx_chan.submit(inputf.read(args.bufsize))
+
+serdes.STATUS.set(EN=1)
+
+# by ADT and leaked schematic, i2c1 contains TAS5770L,
+# which is not a public part. but there's e.g. TAS2770
+# with similar registers
+#
+# https://www.ti.com/product/TAS2770
+#
+# if the speaker-amp IC loses clock on the serial sample input,
+# it automatically switches to software shutdown.
+#
+
+i2c1.write_reg(0x31, 0x08, [0x40])
+i2c1.write_reg(0x31, 0x0a, [0x06, 0x00, 0x1a])
+i2c1.write_reg(0x31, 0x1b, [0x01, 0x82, 0x06])
+i2c1.write_reg(0x31, 0x16, [0x50, 0x04])
+i2c1.write_reg(0x31, 0x0d, [0x00])
+#i2c1.write_reg(0x31, 0x03, [0x14])
+
+# amplifier gain, presumably this is the lowest setting
+i2c1.write_reg(0x31, 0x03, [0x0])
+
+# take the IC out of software shutdown
+i2c1.write_reg(0x31, 0x02, [0x0c])
+
+while (buf := inputf.read(args.bufsize)):
+    while not tx_chan.can_submit():
+        tx_chan.poll()
+    tx_chan.submit(buf)
+
+# mute
+i2c1.write_reg(0x31, 0x02, [0x0d])
+
+# software shutdown
+i2c1.write_reg(0x31, 0x02, [0x0e])
+
+tx_chan.disable()