[alsa-devel] [PATCH 5/7] ASoC: wm2200: Initial DSP support
Mark Brown
broonie at opensource.wolfsonmicro.com
Fri Oct 5 20:55:34 CEST 2012
Support download and execution of firmwares to the DSPs on the WM2200.
Signed-off-by: Mark Brown <broonie at opensource.wolfsonmicro.com>
---
sound/soc/codecs/wm2200.c | 240 ++++++++++++++++++++++++++++++++++++++++++++-
sound/soc/codecs/wmfw.h | 56 +++++++++++
2 files changed, 294 insertions(+), 2 deletions(-)
create mode 100644 sound/soc/codecs/wmfw.h
diff --git a/sound/soc/codecs/wm2200.c b/sound/soc/codecs/wm2200.c
index f24ef0a..e3f549b 100644
--- a/sound/soc/codecs/wm2200.c
+++ b/sound/soc/codecs/wm2200.c
@@ -15,6 +15,7 @@
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
+#include <linux/firmware.h>
#include <linux/gcd.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
@@ -32,6 +33,39 @@
#include <sound/wm2200.h>
#include "wm2200.h"
+#include "wmfw.h"
+
+#define WM2200_DSP_CONTROL_1 0x00
+#define WM2200_DSP_CONTROL_2 0x02
+#define WM2200_DSP_CONTROL_3 0x03
+#define WM2200_DSP_CONTROL_4 0x04
+#define WM2200_DSP_CONTROL_5 0x06
+#define WM2200_DSP_CONTROL_6 0x07
+#define WM2200_DSP_CONTROL_7 0x08
+#define WM2200_DSP_CONTROL_8 0x09
+#define WM2200_DSP_CONTROL_9 0x0A
+#define WM2200_DSP_CONTROL_10 0x0B
+#define WM2200_DSP_CONTROL_11 0x0C
+#define WM2200_DSP_CONTROL_12 0x0D
+#define WM2200_DSP_CONTROL_13 0x0F
+#define WM2200_DSP_CONTROL_14 0x10
+#define WM2200_DSP_CONTROL_15 0x11
+#define WM2200_DSP_CONTROL_16 0x12
+#define WM2200_DSP_CONTROL_17 0x13
+#define WM2200_DSP_CONTROL_18 0x14
+#define WM2200_DSP_CONTROL_19 0x16
+#define WM2200_DSP_CONTROL_20 0x17
+#define WM2200_DSP_CONTROL_21 0x18
+#define WM2200_DSP_CONTROL_22 0x1A
+#define WM2200_DSP_CONTROL_23 0x1B
+#define WM2200_DSP_CONTROL_24 0x1C
+#define WM2200_DSP_CONTROL_25 0x1E
+#define WM2200_DSP_CONTROL_26 0x20
+#define WM2200_DSP_CONTROL_27 0x21
+#define WM2200_DSP_CONTROL_28 0x22
+#define WM2200_DSP_CONTROL_29 0x23
+#define WM2200_DSP_CONTROL_30 0x24
+#define WM2200_DSP_CONTROL_31 0x26
/* The code assumes DCVDD is generated internally */
#define WM2200_NUM_CORE_SUPPLIES 2
@@ -953,6 +987,206 @@ static int wm2200_reset(struct wm2200_priv *wm2200)
}
}
+static int wm2200_dsp_load(struct snd_soc_codec *codec, int base)
+{
+ const struct firmware *firmware;
+ struct regmap *regmap = codec->control_data;
+ unsigned int pos = 0;
+ const struct wmfw_header *header;
+ const struct wmfw_adsp1_sizes *adsp1_sizes;
+ const struct wmfw_footer *footer;
+ const struct wmfw_region *region;
+ const char *file, *region_name;
+ char *text;
+ unsigned int dm, pm, zm, reg;
+ int regions = 0;
+ int ret, offset, type;
+
+ switch (base) {
+ case WM2200_DSP1_CONTROL_1:
+ file = "wm2200-dsp1.wmfw";
+ dm = WM2200_DSP1_DM_BASE;
+ pm = WM2200_DSP1_PM_BASE;
+ zm = WM2200_DSP1_ZM_BASE;
+ break;
+ case WM2200_DSP2_CONTROL_1:
+ file = "wm2200-dsp2.wmfw";
+ dm = WM2200_DSP2_DM_BASE;
+ pm = WM2200_DSP2_PM_BASE;
+ zm = WM2200_DSP2_ZM_BASE;
+ break;
+ default:
+ dev_err(codec->dev, "BASE %x\n", base);
+ BUG_ON(1);
+ return -EINVAL;
+ }
+
+ ret = request_firmware(&firmware, file, codec->dev);
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to request '%s'\n", file);
+ return ret;
+ }
+
+ pos = sizeof(*header) + sizeof(*adsp1_sizes) + sizeof(*footer);
+ if (pos >= firmware->size) {
+ dev_err(codec->dev, "%s: file too short, %d bytes\n",
+ file, firmware->size);
+ return -EINVAL;
+ }
+
+ header = (void*)&firmware->data[0];
+
+ if (memcmp(&header->magic[0], "WMFW", 4) != 0) {
+ dev_err(codec->dev, "%s: invalid magic\n", file);
+ return -EINVAL;
+ }
+
+ if (header->ver != 0) {
+ dev_err(codec->dev, "%s: unknown file format %d\n",
+ file, header->ver);
+ return -EINVAL;
+ }
+
+ if (le32_to_cpu(header->len) != sizeof(*header) +
+ sizeof(*adsp1_sizes) + sizeof(*footer)) {
+ dev_err(codec->dev, "%s: unexpected header length %d\n",
+ file, le32_to_cpu(header->len));
+ return -EINVAL;
+ }
+
+ if (header->core != WMFW_ADSP1) {
+ dev_err(codec->dev, "%s: invalid core %d\n",
+ file, header->core);
+ return -EINVAL;
+ }
+
+ adsp1_sizes = (void *)&(header[1]);
+ footer = (void *)&(adsp1_sizes[1]);
+
+ dev_dbg(codec->dev, "%s: %d DM, %d PM, %d ZM\n",
+ file, le32_to_cpu(adsp1_sizes->dm),
+ le32_to_cpu(adsp1_sizes->pm), le32_to_cpu(adsp1_sizes->zm));
+
+ dev_dbg(codec->dev, "%s: timestamp %llu\n", file,
+ le64_to_cpu(footer->timestamp));
+
+ while (pos < firmware->size &&
+ pos - firmware->size > sizeof(*region)) {
+ region = (void *)&(firmware->data[pos]);
+ region_name = "Unknown";
+ reg = 0;
+ text = NULL;
+ offset = le32_to_cpu(region->offset) & 0xffffff;
+ type = be32_to_cpu(region->type) & 0xff;
+
+ switch (type) {
+ case WMFW_NAME_TEXT:
+ region_name = "Firmware name";
+ text = kzalloc(le32_to_cpu(region->len) + 1,
+ GFP_KERNEL);
+ break;
+ case WMFW_INFO_TEXT:
+ region_name = "Information";
+ text = kzalloc(le32_to_cpu(region->len) + 1,
+ GFP_KERNEL);
+ break;
+ case WMFW_ABSOLUTE:
+ region_name = "Absolute";
+ reg = offset;
+ break;
+ case WMFW_ADSP1_PM:
+ region_name = "PM";
+ reg = pm + (offset * 3);
+ break;
+ case WMFW_ADSP1_DM:
+ region_name = "DM";
+ reg = dm + (offset * 2);
+ break;
+ case WMFW_ADSP1_ZM:
+ region_name = "ZM";
+ reg = zm + (offset * 2);
+ break;
+ default:
+ dev_warn(codec->dev,
+ "%s.%d: Unknown region type %x at %d(%x)\n",
+ file, regions, type, pos, pos);
+ break;
+ }
+
+ dev_dbg(codec->dev, "%s.%d: %d bytes at %d in %s\n", file,
+ regions, le32_to_cpu(region->len), offset,
+ region_name);
+
+ if (text) {
+ memcpy(text, region->data, le32_to_cpu(region->len));
+ dev_info(codec->dev, "%s: %s\n", file, text);
+ kfree(text);
+ }
+
+ if (reg) {
+ ret = regmap_raw_write(regmap, reg, region->data,
+ le32_to_cpu(region->len));
+ if (ret != 0) {
+ dev_err(codec->dev,
+ "%s.%d: Failed to write %d bytes at %d in %s: %d\n",
+ file, regions,
+ le32_to_cpu(region->len), offset,
+ region_name, ret);
+ goto out;
+ }
+ }
+
+ pos += le32_to_cpu(region->len) + sizeof(*region);
+ regions++;
+ }
+
+ if (pos > firmware->size)
+ dev_warn(codec->dev, "%s.%d: %d bytes at end of file\n",
+ file, regions, pos - firmware->size);
+
+out:
+ release_firmware(firmware);
+
+ return ret;
+}
+
+static int wm2200_dsp_ev(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *kcontrol,
+ int event)
+{
+ struct snd_soc_codec *codec = w->codec;
+ int base = w->reg - WM2200_DSP_CONTROL_30;
+ int ret;
+
+ switch (event) {
+ case SND_SOC_DAPM_POST_PMU:
+ ret = wm2200_dsp_load(codec, base);
+ if (ret != 0)
+ return ret;
+
+ /* Start the core running */
+ snd_soc_update_bits(codec, w->reg,
+ WM2200_DSP1_CORE_ENA | WM2200_DSP1_START,
+ WM2200_DSP1_CORE_ENA | WM2200_DSP1_START);
+ break;
+
+ case SND_SOC_DAPM_PRE_PMD:
+ /* Halt the core */
+ snd_soc_update_bits(codec, w->reg,
+ WM2200_DSP1_CORE_ENA | WM2200_DSP1_START,
+ 0);
+
+ snd_soc_update_bits(codec, base + WM2200_DSP_CONTROL_19,
+ WM2200_DSP1_WDMA_BUFFER_LENGTH_MASK, 0);
+ break;
+
+ default:
+ break;
+ }
+
+ return 0;
+}
+
static DECLARE_TLV_DB_SCALE(in_tlv, -6300, 100, 0);
static DECLARE_TLV_DB_SCALE(digital_tlv, -6400, 50, 0);
static DECLARE_TLV_DB_SCALE(out_tlv, -6400, 100, 0);
@@ -1301,9 +1535,11 @@ SND_SOC_DAPM_PGA("LHPF2", WM2200_HPLPF2_1, WM2200_LHPF2_ENA_SHIFT, 0,
NULL, 0),
SND_SOC_DAPM_PGA_E("DSP1", WM2200_DSP1_CONTROL_30, WM2200_DSP1_SYS_ENA_SHIFT,
- 0, NULL, 0, NULL, 0),
+ 0, NULL, 0, wm2200_dsp_ev,
+ SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
SND_SOC_DAPM_PGA_E("DSP2", WM2200_DSP2_CONTROL_30, WM2200_DSP2_SYS_ENA_SHIFT,
- 0, NULL, 0, NULL, 0),
+ 0, NULL, 0, wm2200_dsp_ev,
+ SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
SND_SOC_DAPM_AIF_OUT("AIF1TX1", "Capture", 0,
WM2200_AUDIO_IF_1_22, WM2200_AIF1TX1_ENA_SHIFT, 0),
diff --git a/sound/soc/codecs/wmfw.h b/sound/soc/codecs/wmfw.h
new file mode 100644
index 0000000..ef37316
--- /dev/null
+++ b/sound/soc/codecs/wmfw.h
@@ -0,0 +1,56 @@
+/*
+ * wmfw.h - Wolfson firmware format information
+ *
+ * Copyright 2012 Wolfson Microelectronics plc
+ *
+ * Author: Mark Brown <broonie at opensource.wolfsonmicro.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __WMFW_H
+#define __WMFW_H
+
+#include <linux/types.h>
+
+struct wmfw_header {
+ char magic[4];
+ __le32 len;
+ __le16 rev;
+ u8 core;
+ u8 ver;
+} __packed;
+
+struct wmfw_footer {
+ __le64 timestamp;
+ __le32 checksum;
+} __packed;
+
+struct wmfw_adsp1_sizes {
+ __le32 dm;
+ __le32 pm;
+ __le32 zm;
+} __packed;
+
+struct wmfw_region {
+ union {
+ __be32 type;
+ __le32 offset;
+ };
+ __le32 len;
+ u8 data[];
+} __packed;
+
+#define WMFW_ADSP1 1
+
+#define WMFW_ABSOLUTE 0xf0
+#define WMFW_NAME_TEXT 0xfe
+#define WMFW_INFO_TEXT 0xff
+
+#define WMFW_ADSP1_PM 2
+#define WMFW_ADSP1_DM 3
+#define WMFW_ADSP1_ZM 4
+
+#endif
--
1.7.10.4
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