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ASoC: add support for TAS5805M digital amplifier
Merge series from Daniel Beer <daniel.beer@igorinstitute.com>: This pair of patches implements support for the TAS5805M class D audio amplifier. This driver, and the example configuration in the device-tree file, were originally based on a 4.19 series kernel and have been modified slightly from the tested version.
This commit is contained in:
Mark Brown
commit
2e5a74c68d
56
Documentation/devicetree/bindings/sound/tas5805m.yaml
Normal file
56
Documentation/devicetree/bindings/sound/tas5805m.yaml
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@ -0,0 +1,56 @@
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/sound/tas5805m.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: TAS5805M audio amplifier
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maintainers:
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- Daniel Beer <daniel.beer@igorinstitute.com>
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description: |
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The TAS5805M is a class D audio amplifier with a built-in DSP.
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properties:
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compatible:
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enum:
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- ti,tas5805m
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reg:
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maxItems: 1
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description: |
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I2C address of the amplifier. See the datasheet for possible values.
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pvdd-supply:
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description: |
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Regulator for audio power supply (PVDD in the datasheet).
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pdn-gpios:
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description: |
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Power-down control GPIO (PDN pin in the datasheet).
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ti,dsp-config-name:
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description: |
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The name of the DSP configuration that should be loaded for this
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instance. Configuration blobs are sequences of register writes
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generated from TI's PPC3 tool.
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$ref: /schemas/types.yaml#/definitions/string
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examples:
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- |
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i2c0 {
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#address-cells = <1>;
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#size-cells = <0>;
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tas5805m: tas5805m@2c {
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reg = <0x2c>;
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compatible = "ti,tas5805m";
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pvdd-supply = <&audiopwr>;
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pdn-gpios = <&tlmm 160 0>;
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ti,dsp-config-name = "mono_pbtl_48khz";
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};
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};
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additionalProperties: true
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@ -1485,6 +1485,15 @@ config SND_SOC_TAS5720
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Enable support for Texas Instruments TAS5720L/M high-efficiency mono
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Class-D audio power amplifiers.
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config SND_SOC_TAS5805M
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tristate "Texas Instruments TAS5805M speaker amplifier"
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depends on I2C
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help
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Enable support for Texas Instruments TAS5805M Class-D
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amplifiers. This is a speaker amplifier with an integrated
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DSP. DSP configuration for each instance needs to be supplied
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via a device-tree attribute.
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config SND_SOC_TAS6424
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tristate "Texas Instruments TAS6424 Quad-Channel Audio amplifier"
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depends on I2C
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@ -236,6 +236,7 @@ snd-soc-sti-sas-objs := sti-sas.o
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snd-soc-tas5086-objs := tas5086.o
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snd-soc-tas571x-objs := tas571x.o
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snd-soc-tas5720-objs := tas5720.o
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snd-soc-tas5805m-objs := tas5805m.o
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snd-soc-tas6424-objs := tas6424.o
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snd-soc-tda7419-objs := tda7419.o
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snd-soc-tas2770-objs := tas2770.o
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@ -574,6 +575,7 @@ obj-$(CONFIG_SND_SOC_TAS2764) += snd-soc-tas2764.o
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obj-$(CONFIG_SND_SOC_TAS5086) += snd-soc-tas5086.o
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obj-$(CONFIG_SND_SOC_TAS571X) += snd-soc-tas571x.o
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obj-$(CONFIG_SND_SOC_TAS5720) += snd-soc-tas5720.o
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obj-$(CONFIG_SND_SOC_TAS5805M) += snd-soc-tas5805m.o
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obj-$(CONFIG_SND_SOC_TAS6424) += snd-soc-tas6424.o
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obj-$(CONFIG_SND_SOC_TDA7419) += snd-soc-tda7419.o
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obj-$(CONFIG_SND_SOC_TAS2770) += snd-soc-tas2770.o
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567
sound/soc/codecs/tas5805m.c
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567
sound/soc/codecs/tas5805m.c
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@ -0,0 +1,567 @@
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// SPDX-License-Identifier: GPL-2.0
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//
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// Driver for the TAS5805M Audio Amplifier
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//
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// Author: Andy Liu <andy-liu@ti.com>
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// Author: Daniel Beer <daniel.beer@igorinstitute.com>
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//
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// This is based on a driver originally written by Andy Liu at TI and
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// posted here:
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//
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// https://e2e.ti.com/support/audio-group/audio/f/audio-forum/722027/linux-tas5825m-linux-drivers
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//
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// It has been simplified a little and reworked for the 5.x ALSA SoC API.
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/kernel.h>
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#include <linux/firmware.h>
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#include <linux/slab.h>
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#include <linux/of.h>
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#include <linux/init.h>
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#include <linux/i2c.h>
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#include <linux/regmap.h>
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#include <linux/gpio/consumer.h>
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#include <linux/regulator/consumer.h>
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#include <linux/atomic.h>
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#include <linux/workqueue.h>
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#include <sound/soc.h>
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#include <sound/pcm.h>
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#include <sound/initval.h>
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/* Datasheet-defined registers on page 0, book 0 */
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#define REG_PAGE 0x00
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#define REG_DEVICE_CTRL_1 0x02
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#define REG_DEVICE_CTRL_2 0x03
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#define REG_SIG_CH_CTRL 0x28
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#define REG_SAP_CTRL_1 0x33
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#define REG_FS_MON 0x37
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#define REG_BCK_MON 0x38
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#define REG_CLKDET_STATUS 0x39
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#define REG_VOL_CTL 0x4c
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#define REG_AGAIN 0x54
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#define REG_ADR_PIN_CTRL 0x60
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#define REG_ADR_PIN_CONFIG 0x61
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#define REG_CHAN_FAULT 0x70
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#define REG_GLOBAL_FAULT1 0x71
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#define REG_GLOBAL_FAULT2 0x72
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#define REG_FAULT 0x78
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#define REG_BOOK 0x7f
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/* DEVICE_CTRL_2 register values */
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#define DCTRL2_MODE_DEEP_SLEEP 0x00
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#define DCTRL2_MODE_SLEEP 0x01
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#define DCTRL2_MODE_HIZ 0x02
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#define DCTRL2_MODE_PLAY 0x03
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#define DCTRL2_MUTE 0x08
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#define DCTRL2_DIS_DSP 0x10
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/* This sequence of register writes must always be sent, prior to the
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* 5ms delay while we wait for the DSP to boot.
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*/
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static const uint8_t dsp_cfg_preboot[] = {
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0x00, 0x00, 0x7f, 0x00, 0x03, 0x02, 0x01, 0x11,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x7f, 0x00, 0x03, 0x02,
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};
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static const uint32_t tas5805m_volume[] = {
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0x0000001B, /* 0, -110dB */ 0x0000001E, /* 1, -109dB */
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0x00000021, /* 2, -108dB */ 0x00000025, /* 3, -107dB */
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0x0000002A, /* 4, -106dB */ 0x0000002F, /* 5, -105dB */
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0x00000035, /* 6, -104dB */ 0x0000003B, /* 7, -103dB */
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0x00000043, /* 8, -102dB */ 0x0000004B, /* 9, -101dB */
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0x00000054, /* 10, -100dB */ 0x0000005E, /* 11, -99dB */
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0x0000006A, /* 12, -98dB */ 0x00000076, /* 13, -97dB */
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0x00000085, /* 14, -96dB */ 0x00000095, /* 15, -95dB */
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0x000000A7, /* 16, -94dB */ 0x000000BC, /* 17, -93dB */
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0x000000D3, /* 18, -92dB */ 0x000000EC, /* 19, -91dB */
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0x00000109, /* 20, -90dB */ 0x0000012A, /* 21, -89dB */
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0x0000014E, /* 22, -88dB */ 0x00000177, /* 23, -87dB */
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0x000001A4, /* 24, -86dB */ 0x000001D8, /* 25, -85dB */
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0x00000211, /* 26, -84dB */ 0x00000252, /* 27, -83dB */
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0x0000029A, /* 28, -82dB */ 0x000002EC, /* 29, -81dB */
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0x00000347, /* 30, -80dB */ 0x000003AD, /* 31, -79dB */
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0x00000420, /* 32, -78dB */ 0x000004A1, /* 33, -77dB */
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0x00000532, /* 34, -76dB */ 0x000005D4, /* 35, -75dB */
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0x0000068A, /* 36, -74dB */ 0x00000756, /* 37, -73dB */
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0x0000083B, /* 38, -72dB */ 0x0000093C, /* 39, -71dB */
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0x00000A5D, /* 40, -70dB */ 0x00000BA0, /* 41, -69dB */
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0x00000D0C, /* 42, -68dB */ 0x00000EA3, /* 43, -67dB */
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0x0000106C, /* 44, -66dB */ 0x0000126D, /* 45, -65dB */
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0x000014AD, /* 46, -64dB */ 0x00001733, /* 47, -63dB */
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0x00001A07, /* 48, -62dB */ 0x00001D34, /* 49, -61dB */
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0x000020C5, /* 50, -60dB */ 0x000024C4, /* 51, -59dB */
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0x00002941, /* 52, -58dB */ 0x00002E49, /* 53, -57dB */
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0x000033EF, /* 54, -56dB */ 0x00003A45, /* 55, -55dB */
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0x00004161, /* 56, -54dB */ 0x0000495C, /* 57, -53dB */
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0x0000524F, /* 58, -52dB */ 0x00005C5A, /* 59, -51dB */
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0x0000679F, /* 60, -50dB */ 0x00007444, /* 61, -49dB */
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0x00008274, /* 62, -48dB */ 0x0000925F, /* 63, -47dB */
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0x0000A43B, /* 64, -46dB */ 0x0000B845, /* 65, -45dB */
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0x0000CEC1, /* 66, -44dB */ 0x0000E7FB, /* 67, -43dB */
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0x00010449, /* 68, -42dB */ 0x0001240C, /* 69, -41dB */
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0x000147AE, /* 70, -40dB */ 0x00016FAA, /* 71, -39dB */
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0x00019C86, /* 72, -38dB */ 0x0001CEDC, /* 73, -37dB */
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0x00020756, /* 74, -36dB */ 0x000246B5, /* 75, -35dB */
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0x00028DCF, /* 76, -34dB */ 0x0002DD96, /* 77, -33dB */
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0x00033718, /* 78, -32dB */ 0x00039B87, /* 79, -31dB */
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0x00040C37, /* 80, -30dB */ 0x00048AA7, /* 81, -29dB */
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0x00051884, /* 82, -28dB */ 0x0005B7B1, /* 83, -27dB */
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0x00066A4A, /* 84, -26dB */ 0x000732AE, /* 85, -25dB */
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0x00081385, /* 86, -24dB */ 0x00090FCC, /* 87, -23dB */
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0x000A2ADB, /* 88, -22dB */ 0x000B6873, /* 89, -21dB */
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0x000CCCCD, /* 90, -20dB */ 0x000E5CA1, /* 91, -19dB */
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0x00101D3F, /* 92, -18dB */ 0x0012149A, /* 93, -17dB */
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0x00144961, /* 94, -16dB */ 0x0016C311, /* 95, -15dB */
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0x00198A13, /* 96, -14dB */ 0x001CA7D7, /* 97, -13dB */
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0x002026F3, /* 98, -12dB */ 0x00241347, /* 99, -11dB */
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0x00287A27, /* 100, -10dB */ 0x002D6A86, /* 101, -9dB */
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0x0032F52D, /* 102, -8dB */ 0x00392CEE, /* 103, -7dB */
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0x004026E7, /* 104, -6dB */ 0x0047FACD, /* 105, -5dB */
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0x0050C336, /* 106, -4dB */ 0x005A9DF8, /* 107, -3dB */
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0x0065AC8C, /* 108, -2dB */ 0x00721483, /* 109, -1dB */
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0x00800000, /* 110, 0dB */ 0x008F9E4D, /* 111, 1dB */
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0x00A12478, /* 112, 2dB */ 0x00B4CE08, /* 113, 3dB */
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0x00CADDC8, /* 114, 4dB */ 0x00E39EA9, /* 115, 5dB */
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0x00FF64C1, /* 116, 6dB */ 0x011E8E6A, /* 117, 7dB */
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0x0141857F, /* 118, 8dB */ 0x0168C0C6, /* 119, 9dB */
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0x0194C584, /* 120, 10dB */ 0x01C62940, /* 121, 11dB */
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0x01FD93C2, /* 122, 12dB */ 0x023BC148, /* 123, 13dB */
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0x02818508, /* 124, 14dB */ 0x02CFCC01, /* 125, 15dB */
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0x0327A01A, /* 126, 16dB */ 0x038A2BAD, /* 127, 17dB */
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0x03F8BD7A, /* 128, 18dB */ 0x0474CD1B, /* 129, 19dB */
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0x05000000, /* 130, 20dB */ 0x059C2F02, /* 131, 21dB */
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0x064B6CAE, /* 132, 22dB */ 0x07100C4D, /* 133, 23dB */
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0x07ECA9CD, /* 134, 24dB */ 0x08E43299, /* 135, 25dB */
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0x09F9EF8E, /* 136, 26dB */ 0x0B319025, /* 137, 27dB */
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0x0C8F36F2, /* 138, 28dB */ 0x0E1787B8, /* 139, 29dB */
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0x0FCFB725, /* 140, 30dB */ 0x11BD9C84, /* 141, 31dB */
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0x13E7C594, /* 142, 32dB */ 0x16558CCB, /* 143, 33dB */
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0x190F3254, /* 144, 34dB */ 0x1C1DF80E, /* 145, 35dB */
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0x1F8C4107, /* 146, 36dB */ 0x2365B4BF, /* 147, 37dB */
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0x27B766C2, /* 148, 38dB */ 0x2C900313, /* 149, 39dB */
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0x32000000, /* 150, 40dB */ 0x3819D612, /* 151, 41dB */
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0x3EF23ECA, /* 152, 42dB */ 0x46A07B07, /* 153, 43dB */
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0x4F3EA203, /* 154, 44dB */ 0x58E9F9F9, /* 155, 45dB */
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0x63C35B8E, /* 156, 46dB */ 0x6FEFA16D, /* 157, 47dB */
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0x7D982575, /* 158, 48dB */
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};
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#define TAS5805M_VOLUME_MAX ((int)ARRAY_SIZE(tas5805m_volume) - 1)
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#define TAS5805M_VOLUME_MIN 0
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struct tas5805m_priv {
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struct regulator *pvdd;
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struct gpio_desc *gpio_pdn_n;
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uint8_t *dsp_cfg_data;
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int dsp_cfg_len;
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struct regmap *regmap;
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int vol[2];
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bool is_powered;
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bool is_muted;
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};
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static void set_dsp_scale(struct regmap *rm, int offset, int vol)
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{
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uint8_t v[4];
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uint32_t x = tas5805m_volume[vol];
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int i;
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for (i = 0; i < 4; i++) {
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v[3 - i] = x;
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x >>= 8;
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}
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regmap_bulk_write(rm, offset, v, ARRAY_SIZE(v));
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}
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static void tas5805m_refresh(struct snd_soc_component *component)
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{
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struct tas5805m_priv *tas5805m =
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snd_soc_component_get_drvdata(component);
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struct regmap *rm = tas5805m->regmap;
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dev_dbg(component->dev, "refresh: is_muted=%d, vol=%d/%d\n",
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tas5805m->is_muted, tas5805m->vol[0], tas5805m->vol[1]);
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regmap_write(rm, REG_PAGE, 0x00);
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regmap_write(rm, REG_BOOK, 0x8c);
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regmap_write(rm, REG_PAGE, 0x2a);
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/* Refresh volume. The actual volume control documented in the
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* datasheet doesn't seem to work correctly. This is a pair of
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* DSP registers which are *not* documented in the datasheet.
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*/
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set_dsp_scale(rm, 0x24, tas5805m->vol[0]);
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set_dsp_scale(rm, 0x28, tas5805m->vol[1]);
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/* Set/clear digital soft-mute */
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regmap_write(rm, REG_DEVICE_CTRL_2,
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(tas5805m->is_muted ? DCTRL2_MUTE : 0) |
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DCTRL2_MODE_PLAY);
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}
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static int tas5805m_vol_info(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_info *uinfo)
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{
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uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
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uinfo->count = 2;
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uinfo->value.integer.min = TAS5805M_VOLUME_MIN;
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uinfo->value.integer.max = TAS5805M_VOLUME_MAX;
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return 0;
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}
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static int tas5805m_vol_get(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_soc_component *component =
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snd_soc_kcontrol_component(kcontrol);
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struct tas5805m_priv *tas5805m =
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snd_soc_component_get_drvdata(component);
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ucontrol->value.integer.value[0] = tas5805m->vol[0];
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ucontrol->value.integer.value[1] = tas5805m->vol[1];
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return 0;
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}
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static inline int volume_is_valid(int v)
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{
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return (v >= TAS5805M_VOLUME_MIN) && (v <= TAS5805M_VOLUME_MAX);
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}
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static int tas5805m_vol_put(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_soc_component *component =
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snd_soc_kcontrol_component(kcontrol);
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struct tas5805m_priv *tas5805m =
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snd_soc_component_get_drvdata(component);
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if (!(volume_is_valid(ucontrol->value.integer.value[0]) &&
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volume_is_valid(ucontrol->value.integer.value[1])))
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return -EINVAL;
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if (tas5805m->vol[0] != ucontrol->value.integer.value[0] ||
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tas5805m->vol[1] != ucontrol->value.integer.value[1]) {
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tas5805m->vol[0] = ucontrol->value.integer.value[0];
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tas5805m->vol[1] = ucontrol->value.integer.value[1];
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dev_dbg(component->dev, "set vol=%d/%d (is_powered=%d)\n",
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||||
tas5805m->vol[0], tas5805m->vol[1],
|
||||
tas5805m->is_powered);
|
||||
if (tas5805m->is_powered)
|
||||
tas5805m_refresh(component);
|
||||
return 1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct snd_kcontrol_new tas5805m_snd_controls[] = {
|
||||
{
|
||||
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
|
||||
.name = "Master Playback Volume",
|
||||
.access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |
|
||||
SNDRV_CTL_ELEM_ACCESS_READWRITE,
|
||||
.info = tas5805m_vol_info,
|
||||
.get = tas5805m_vol_get,
|
||||
.put = tas5805m_vol_put,
|
||||
},
|
||||
};
|
||||
|
||||
static void send_cfg(struct regmap *rm,
|
||||
const uint8_t *s, unsigned int len)
|
||||
{
|
||||
unsigned int i;
|
||||
|
||||
for (i = 0; i + 1 < len; i += 2)
|
||||
regmap_write(rm, s[i], s[i + 1]);
|
||||
}
|
||||
|
||||
/* The TAS5805M DSP can't be configured until the I2S clock has been
|
||||
* present and stable for 5ms, or else it won't boot and we get no
|
||||
* sound.
|
||||
*/
|
||||
static int tas5805m_trigger(struct snd_pcm_substream *substream, int cmd,
|
||||
struct snd_soc_dai *dai)
|
||||
{
|
||||
struct snd_soc_component *component = dai->component;
|
||||
struct tas5805m_priv *tas5805m =
|
||||
snd_soc_component_get_drvdata(component);
|
||||
struct regmap *rm = tas5805m->regmap;
|
||||
unsigned int chan, global1, global2;
|
||||
|
||||
switch (cmd) {
|
||||
case SNDRV_PCM_TRIGGER_START:
|
||||
case SNDRV_PCM_TRIGGER_RESUME:
|
||||
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
|
||||
dev_dbg(component->dev, "DSP startup\n");
|
||||
|
||||
/* We mustn't issue any I2C transactions until the I2S
|
||||
* clock is stable. Furthermore, we must allow a 5ms
|
||||
* delay after the first set of register writes to
|
||||
* allow the DSP to boot before configuring it.
|
||||
*/
|
||||
usleep_range(5000, 10000);
|
||||
send_cfg(rm, dsp_cfg_preboot,
|
||||
ARRAY_SIZE(dsp_cfg_preboot));
|
||||
usleep_range(5000, 15000);
|
||||
send_cfg(rm, tas5805m->dsp_cfg_data,
|
||||
tas5805m->dsp_cfg_len);
|
||||
|
||||
tas5805m->is_powered = true;
|
||||
tas5805m_refresh(component);
|
||||
break;
|
||||
|
||||
case SNDRV_PCM_TRIGGER_STOP:
|
||||
case SNDRV_PCM_TRIGGER_SUSPEND:
|
||||
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
|
||||
dev_dbg(component->dev, "DSP shutdown\n");
|
||||
|
||||
tas5805m->is_powered = false;
|
||||
|
||||
regmap_write(rm, REG_PAGE, 0x00);
|
||||
regmap_write(rm, REG_BOOK, 0x00);
|
||||
|
||||
regmap_read(rm, REG_CHAN_FAULT, &chan);
|
||||
regmap_read(rm, REG_GLOBAL_FAULT1, &global1);
|
||||
regmap_read(rm, REG_GLOBAL_FAULT2, &global2);
|
||||
|
||||
dev_dbg(component->dev,
|
||||
"fault regs: CHAN=%02x, GLOBAL1=%02x, GLOBAL2=%02x\n",
|
||||
chan, global1, global2);
|
||||
|
||||
regmap_write(rm, REG_DEVICE_CTRL_2, DCTRL2_MODE_HIZ);
|
||||
break;
|
||||
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct snd_soc_dapm_route tas5805m_audio_map[] = {
|
||||
{ "DAC", NULL, "DAC IN" },
|
||||
{ "OUT", NULL, "DAC" },
|
||||
};
|
||||
|
||||
static const struct snd_soc_dapm_widget tas5805m_dapm_widgets[] = {
|
||||
SND_SOC_DAPM_AIF_IN("DAC IN", "Playback", 0, SND_SOC_NOPM, 0, 0),
|
||||
SND_SOC_DAPM_DAC("DAC", NULL, SND_SOC_NOPM, 0, 0),
|
||||
SND_SOC_DAPM_OUTPUT("OUT")
|
||||
};
|
||||
|
||||
static const struct snd_soc_component_driver soc_codec_dev_tas5805m = {
|
||||
.controls = tas5805m_snd_controls,
|
||||
.num_controls = ARRAY_SIZE(tas5805m_snd_controls),
|
||||
.dapm_widgets = tas5805m_dapm_widgets,
|
||||
.num_dapm_widgets = ARRAY_SIZE(tas5805m_dapm_widgets),
|
||||
.dapm_routes = tas5805m_audio_map,
|
||||
.num_dapm_routes = ARRAY_SIZE(tas5805m_audio_map),
|
||||
.use_pmdown_time = 1,
|
||||
.endianness = 1,
|
||||
.non_legacy_dai_naming = 1,
|
||||
};
|
||||
|
||||
static int tas5805m_mute(struct snd_soc_dai *dai, int mute, int direction)
|
||||
{
|
||||
struct snd_soc_component *component = dai->component;
|
||||
struct tas5805m_priv *tas5805m =
|
||||
snd_soc_component_get_drvdata(component);
|
||||
|
||||
dev_dbg(component->dev, "set mute=%d (is_powered=%d)\n",
|
||||
mute, tas5805m->is_powered);
|
||||
tas5805m->is_muted = mute;
|
||||
if (tas5805m->is_powered)
|
||||
tas5805m_refresh(component);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct snd_soc_dai_ops tas5805m_dai_ops = {
|
||||
.trigger = tas5805m_trigger,
|
||||
.mute_stream = tas5805m_mute,
|
||||
.no_capture_mute = 1,
|
||||
};
|
||||
|
||||
static struct snd_soc_dai_driver tas5805m_dai = {
|
||||
.name = "tas5805m-amplifier",
|
||||
.playback = {
|
||||
.stream_name = "Playback",
|
||||
.channels_min = 2,
|
||||
.channels_max = 2,
|
||||
.rates = SNDRV_PCM_RATE_48000,
|
||||
.formats = SNDRV_PCM_FMTBIT_S32_LE,
|
||||
},
|
||||
.ops = &tas5805m_dai_ops,
|
||||
};
|
||||
|
||||
static const struct regmap_config tas5805m_regmap = {
|
||||
.reg_bits = 8,
|
||||
.val_bits = 8,
|
||||
|
||||
/* We have quite a lot of multi-level bank switching and a
|
||||
* relatively small number of register writes between bank
|
||||
* switches.
|
||||
*/
|
||||
.cache_type = REGCACHE_NONE,
|
||||
};
|
||||
|
||||
static int tas5805m_i2c_probe(struct i2c_client *i2c)
|
||||
{
|
||||
struct device *dev = &i2c->dev;
|
||||
struct regmap *regmap;
|
||||
struct tas5805m_priv *tas5805m;
|
||||
char filename[128];
|
||||
const char *config_name;
|
||||
const struct firmware *fw;
|
||||
int ret;
|
||||
|
||||
regmap = devm_regmap_init_i2c(i2c, &tas5805m_regmap);
|
||||
if (IS_ERR(regmap)) {
|
||||
ret = PTR_ERR(regmap);
|
||||
dev_err(dev, "unable to allocate register map: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
tas5805m = devm_kzalloc(dev, sizeof(struct tas5805m_priv), GFP_KERNEL);
|
||||
if (!tas5805m)
|
||||
return -ENOMEM;
|
||||
|
||||
tas5805m->pvdd = devm_regulator_get(dev, "pvdd");
|
||||
if (IS_ERR(tas5805m->pvdd)) {
|
||||
dev_err(dev, "failed to get pvdd supply: %ld\n",
|
||||
PTR_ERR(tas5805m->pvdd));
|
||||
return PTR_ERR(tas5805m->pvdd);
|
||||
}
|
||||
|
||||
dev_set_drvdata(dev, tas5805m);
|
||||
tas5805m->regmap = regmap;
|
||||
tas5805m->gpio_pdn_n = devm_gpiod_get(dev, "pdn", GPIOD_OUT_LOW);
|
||||
if (IS_ERR(tas5805m->gpio_pdn_n)) {
|
||||
dev_err(dev, "error requesting PDN gpio: %ld\n",
|
||||
PTR_ERR(tas5805m->gpio_pdn_n));
|
||||
return PTR_ERR(tas5805m->gpio_pdn_n);
|
||||
}
|
||||
|
||||
/* This configuration must be generated by PPC3. The file loaded
|
||||
* consists of a sequence of register writes, where bytes at
|
||||
* even indices are register addresses and those at odd indices
|
||||
* are register values.
|
||||
*
|
||||
* The fixed portion of PPC3's output prior to the 5ms delay
|
||||
* should be omitted.
|
||||
*/
|
||||
if (device_property_read_string(dev, "ti,dsp-config-name",
|
||||
&config_name))
|
||||
config_name = "default";
|
||||
|
||||
snprintf(filename, sizeof(filename), "tas5805m_dsp_%s.bin",
|
||||
config_name);
|
||||
ret = request_firmware(&fw, filename, dev);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
if ((fw->size < 2) || (fw->size & 1)) {
|
||||
dev_err(dev, "firmware is invalid\n");
|
||||
release_firmware(fw);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
tas5805m->dsp_cfg_len = fw->size;
|
||||
tas5805m->dsp_cfg_data = devm_kmalloc(dev, fw->size, GFP_KERNEL);
|
||||
if (!tas5805m->dsp_cfg_data) {
|
||||
release_firmware(fw);
|
||||
return -ENOMEM;
|
||||
}
|
||||
memcpy(tas5805m->dsp_cfg_data, fw->data, fw->size);
|
||||
|
||||
release_firmware(fw);
|
||||
|
||||
/* Do the first part of the power-on here, while we can expect
|
||||
* the I2S interface to be quiet. We must raise PDN# and then
|
||||
* wait 5ms before any I2S clock is sent, or else the internal
|
||||
* regulator apparently won't come on.
|
||||
*
|
||||
* Also, we must keep the device in power down for 100ms or so
|
||||
* after PVDD is applied, or else the ADR pin is sampled
|
||||
* incorrectly and the device comes up with an unpredictable I2C
|
||||
* address.
|
||||
*/
|
||||
tas5805m->vol[0] = TAS5805M_VOLUME_MIN;
|
||||
tas5805m->vol[1] = TAS5805M_VOLUME_MIN;
|
||||
|
||||
ret = regulator_enable(tas5805m->pvdd);
|
||||
if (ret < 0) {
|
||||
dev_err(dev, "failed to enable pvdd: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
usleep_range(100000, 150000);
|
||||
gpiod_set_value(tas5805m->gpio_pdn_n, 1);
|
||||
usleep_range(10000, 15000);
|
||||
|
||||
/* Don't register through devm. We need to be able to unregister
|
||||
* the component prior to deasserting PDN#
|
||||
*/
|
||||
ret = snd_soc_register_component(dev, &soc_codec_dev_tas5805m,
|
||||
&tas5805m_dai, 1);
|
||||
if (ret < 0) {
|
||||
dev_err(dev, "unable to register codec: %d\n", ret);
|
||||
gpiod_set_value(tas5805m->gpio_pdn_n, 0);
|
||||
regulator_disable(tas5805m->pvdd);
|
||||
return ret;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int tas5805m_i2c_remove(struct i2c_client *i2c)
|
||||
{
|
||||
struct device *dev = &i2c->dev;
|
||||
struct tas5805m_priv *tas5805m = dev_get_drvdata(dev);
|
||||
|
||||
snd_soc_unregister_component(dev);
|
||||
gpiod_set_value(tas5805m->gpio_pdn_n, 0);
|
||||
usleep_range(10000, 15000);
|
||||
regulator_disable(tas5805m->pvdd);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct i2c_device_id tas5805m_i2c_id[] = {
|
||||
{ "tas5805m", },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, tas5805m_i2c_id);
|
||||
|
||||
#if IS_ENABLED(CONFIG_OF)
|
||||
static const struct of_device_id tas5805m_of_match[] = {
|
||||
{ .compatible = "ti,tas5805m", },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, tas5805m_of_match);
|
||||
#endif
|
||||
|
||||
static struct i2c_driver tas5805m_i2c_driver = {
|
||||
.probe_new = tas5805m_i2c_probe,
|
||||
.remove = tas5805m_i2c_remove,
|
||||
.id_table = tas5805m_i2c_id,
|
||||
.driver = {
|
||||
.name = "tas5805m",
|
||||
.of_match_table = of_match_ptr(tas5805m_of_match),
|
||||
},
|
||||
};
|
||||
|
||||
module_i2c_driver(tas5805m_i2c_driver);
|
||||
|
||||
MODULE_AUTHOR("Andy Liu <andy-liu@ti.com>");
|
||||
MODULE_AUTHOR("Daniel Beer <daniel.beer@igorinstitute.com>");
|
||||
MODULE_DESCRIPTION("TAS5805M Audio Amplifier Driver");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
Loading…
Reference in New Issue
Block a user