/*
 * wm_adsp.c  --  Wolfson ADSP support
 *
 * Copyright 2012 Wolfson Microelectronics plc
 *
 * Author: Mark Brown <broonie@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.
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/list.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/workqueue.h>
#include <linux/debugfs.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/jack.h>
#include <sound/initval.h>
#include <sound/tlv.h>

#include "wm_adsp.h"

#define adsp_crit(_dsp, fmt, ...) \
        dev_crit(_dsp->dev, "DSP%d: " fmt, _dsp->num, ##__VA_ARGS__)
#define adsp_err(_dsp, fmt, ...) \
        dev_err(_dsp->dev, "DSP%d: " fmt, _dsp->num, ##__VA_ARGS__)
#define adsp_warn(_dsp, fmt, ...) \
        dev_warn(_dsp->dev, "DSP%d: " fmt, _dsp->num, ##__VA_ARGS__)
#define adsp_info(_dsp, fmt, ...) \
        dev_info(_dsp->dev, "DSP%d: " fmt, _dsp->num, ##__VA_ARGS__)
#define adsp_dbg(_dsp, fmt, ...) \
        dev_dbg(_dsp->dev, "DSP%d: " fmt, _dsp->num, ##__VA_ARGS__)

#define ADSP1_CONTROL_1                   0x00
#define ADSP1_CONTROL_2                   0x02
#define ADSP1_CONTROL_3                   0x03
#define ADSP1_CONTROL_4                   0x04
#define ADSP1_CONTROL_5                   0x06
#define ADSP1_CONTROL_6                   0x07
#define ADSP1_CONTROL_7                   0x08
#define ADSP1_CONTROL_8                   0x09
#define ADSP1_CONTROL_9                   0x0A
#define ADSP1_CONTROL_10                  0x0B
#define ADSP1_CONTROL_11                  0x0C
#define ADSP1_CONTROL_12                  0x0D
#define ADSP1_CONTROL_13                  0x0F
#define ADSP1_CONTROL_14                  0x10
#define ADSP1_CONTROL_15                  0x11
#define ADSP1_CONTROL_16                  0x12
#define ADSP1_CONTROL_17                  0x13
#define ADSP1_CONTROL_18                  0x14
#define ADSP1_CONTROL_19                  0x16
#define ADSP1_CONTROL_20                  0x17
#define ADSP1_CONTROL_21                  0x18
#define ADSP1_CONTROL_22                  0x1A
#define ADSP1_CONTROL_23                  0x1B
#define ADSP1_CONTROL_24                  0x1C
#define ADSP1_CONTROL_25                  0x1E
#define ADSP1_CONTROL_26                  0x20
#define ADSP1_CONTROL_27                  0x21
#define ADSP1_CONTROL_28                  0x22
#define ADSP1_CONTROL_29                  0x23
#define ADSP1_CONTROL_30                  0x24
#define ADSP1_CONTROL_31                  0x26

/*
 * ADSP1 Control 19
 */
#define ADSP1_WDMA_BUFFER_LENGTH_MASK     0x00FF  /* DSP1_WDMA_BUFFER_LENGTH - [7:0] */
#define ADSP1_WDMA_BUFFER_LENGTH_SHIFT         0  /* DSP1_WDMA_BUFFER_LENGTH - [7:0] */
#define ADSP1_WDMA_BUFFER_LENGTH_WIDTH         8  /* DSP1_WDMA_BUFFER_LENGTH - [7:0] */


/*
 * ADSP1 Control 30
 */
#define ADSP1_DBG_CLK_ENA                 0x0008  /* DSP1_DBG_CLK_ENA */
#define ADSP1_DBG_CLK_ENA_MASK            0x0008  /* DSP1_DBG_CLK_ENA */
#define ADSP1_DBG_CLK_ENA_SHIFT                3  /* DSP1_DBG_CLK_ENA */
#define ADSP1_DBG_CLK_ENA_WIDTH                1  /* DSP1_DBG_CLK_ENA */
#define ADSP1_SYS_ENA                     0x0004  /* DSP1_SYS_ENA */
#define ADSP1_SYS_ENA_MASK                0x0004  /* DSP1_SYS_ENA */
#define ADSP1_SYS_ENA_SHIFT                    2  /* DSP1_SYS_ENA */
#define ADSP1_SYS_ENA_WIDTH                    1  /* DSP1_SYS_ENA */
#define ADSP1_CORE_ENA                    0x0002  /* DSP1_CORE_ENA */
#define ADSP1_CORE_ENA_MASK               0x0002  /* DSP1_CORE_ENA */
#define ADSP1_CORE_ENA_SHIFT                   1  /* DSP1_CORE_ENA */
#define ADSP1_CORE_ENA_WIDTH                   1  /* DSP1_CORE_ENA */
#define ADSP1_START                       0x0001  /* DSP1_START */
#define ADSP1_START_MASK                  0x0001  /* DSP1_START */
#define ADSP1_START_SHIFT                      0  /* DSP1_START */
#define ADSP1_START_WIDTH                      1  /* DSP1_START */

/*
 * ADSP1 Control 31
 */
#define ADSP1_CLK_SEL_MASK                0x0007  /* CLK_SEL_ENA */
#define ADSP1_CLK_SEL_SHIFT                    0  /* CLK_SEL_ENA */
#define ADSP1_CLK_SEL_WIDTH                    3  /* CLK_SEL_ENA */

#define ADSP2_CONTROL        0x0
#define ADSP2_CLOCKING       0x1
#define ADSP2_STATUS1        0x4
#define ADSP2_WDMA_CONFIG_1 0x30
#define ADSP2_WDMA_CONFIG_2 0x31
#define ADSP2_RDMA_CONFIG_1 0x34

#define ADSP2_SCRATCH0        0x40
#define ADSP2_SCRATCH1        0x41
#define ADSP2_SCRATCH2        0x42
#define ADSP2_SCRATCH3        0x43

/*
 * ADSP2 Control
 */

#define ADSP2_MEM_ENA                     0x0010  /* DSP1_MEM_ENA */
#define ADSP2_MEM_ENA_MASK                0x0010  /* DSP1_MEM_ENA */
#define ADSP2_MEM_ENA_SHIFT                    4  /* DSP1_MEM_ENA */
#define ADSP2_MEM_ENA_WIDTH                    1  /* DSP1_MEM_ENA */
#define ADSP2_SYS_ENA                     0x0004  /* DSP1_SYS_ENA */
#define ADSP2_SYS_ENA_MASK                0x0004  /* DSP1_SYS_ENA */
#define ADSP2_SYS_ENA_SHIFT                    2  /* DSP1_SYS_ENA */
#define ADSP2_SYS_ENA_WIDTH                    1  /* DSP1_SYS_ENA */
#define ADSP2_CORE_ENA                    0x0002  /* DSP1_CORE_ENA */
#define ADSP2_CORE_ENA_MASK               0x0002  /* DSP1_CORE_ENA */
#define ADSP2_CORE_ENA_SHIFT                   1  /* DSP1_CORE_ENA */
#define ADSP2_CORE_ENA_WIDTH                   1  /* DSP1_CORE_ENA */
#define ADSP2_START                       0x0001  /* DSP1_START */
#define ADSP2_START_MASK                  0x0001  /* DSP1_START */
#define ADSP2_START_SHIFT                      0  /* DSP1_START */
#define ADSP2_START_WIDTH                      1  /* DSP1_START */

/*
 * ADSP2 clocking
 */
#define ADSP2_CLK_SEL_MASK                0x0007  /* CLK_SEL_ENA */
#define ADSP2_CLK_SEL_SHIFT                    0  /* CLK_SEL_ENA */
#define ADSP2_CLK_SEL_WIDTH                    3  /* CLK_SEL_ENA */

/*
 * ADSP2 Status 1
 */
#define ADSP2_RAM_RDY                     0x0001
#define ADSP2_RAM_RDY_MASK                0x0001
#define ADSP2_RAM_RDY_SHIFT                    0
#define ADSP2_RAM_RDY_WIDTH                    1

#define ADSP_MAX_STD_CTRL_SIZE               512

struct wm_adsp_buf {
        struct list_head list;
        void *buf;
};

static struct wm_adsp_buf *wm_adsp_buf_alloc(const void *src, size_t len,
                                             struct list_head *list)
{
        struct wm_adsp_buf *buf = kzalloc(sizeof(*buf), GFP_KERNEL);

        if (buf == NULL)
                return NULL;

        buf->buf = vmalloc(len);
        if (!buf->buf) {
                vfree(buf);
                return NULL;
        }
        memcpy(buf->buf, src, len);

        if (list)
                list_add_tail(&buf->list, list);

        return buf;
}

static void wm_adsp_buf_free(struct list_head *list)
{
        while (!list_empty(list)) {
                struct wm_adsp_buf *buf = list_first_entry(list,
                                                           struct wm_adsp_buf,
                                                           list);
                list_del(&buf->list);
                vfree(buf->buf);
                kfree(buf);
        }
}

#define WM_ADSP_FW_MBC_VSS  0
#define WM_ADSP_FW_HIFI     1
#define WM_ADSP_FW_TX       2
#define WM_ADSP_FW_TX_SPK   3
#define WM_ADSP_FW_RX       4
#define WM_ADSP_FW_RX_ANC   5
#define WM_ADSP_FW_CTRL     6
#define WM_ADSP_FW_ASR      7
#define WM_ADSP_FW_TRACE    8
#define WM_ADSP_FW_SPK_PROT 9
#define WM_ADSP_FW_MISC     10

#define WM_ADSP_NUM_FW      11

static const char *wm_adsp_fw_text[WM_ADSP_NUM_FW] = {
        [WM_ADSP_FW_MBC_VSS] =  "MBC/VSS",
        [WM_ADSP_FW_HIFI] =     "MasterHiFi",
        [WM_ADSP_FW_TX] =       "Tx",
        [WM_ADSP_FW_TX_SPK] =   "Tx Speaker",
        [WM_ADSP_FW_RX] =       "Rx",
        [WM_ADSP_FW_RX_ANC] =   "Rx ANC",
        [WM_ADSP_FW_CTRL] =     "Voice Ctrl",
        [WM_ADSP_FW_ASR] =      "ASR Assist",
        [WM_ADSP_FW_TRACE] =    "Dbg Trace",
        [WM_ADSP_FW_SPK_PROT] = "Protection",
        [WM_ADSP_FW_MISC] =     "Misc",
};

struct wm_adsp_system_config_xm_hdr {
        __be32 sys_enable;
        __be32 fw_id;
        __be32 fw_rev;
        __be32 boot_status;
        __be32 watchdog;
        __be32 dma_buffer_size;
        __be32 rdma[6];
        __be32 wdma[8];
        __be32 build_job_name[3];
        __be32 build_job_number;
};

struct wm_adsp_alg_xm_struct {
        __be32 magic;
        __be32 smoothing;
        __be32 threshold;
        __be32 host_buf_ptr;
        __be32 start_seq;
        __be32 high_water_mark;
        __be32 low_water_mark;
        __be64 smoothed_power;
};

struct wm_adsp_buffer {
        __be32 X_buf_base;              /* XM base addr of first X area */
        __be32 X_buf_size;              /* Size of 1st X area in words */
        __be32 X_buf_base2;             /* XM base addr of 2nd X area */
        __be32 X_buf_brk;               /* Total X size in words */
        __be32 Y_buf_base;              /* YM base addr of Y area */
        __be32 wrap;                    /* Total size X and Y in words */
        __be32 high_water_mark;         /* Point at which IRQ is asserted */
        __be32 irq_count;               /* bits 1-31 count IRQ assertions */
        __be32 irq_ack;                 /* acked IRQ count, bit 0 enables IRQ */
        __be32 next_write_index;        /* word index of next write */
        __be32 next_read_index;         /* word index of next read */
        __be32 error;                   /* error if any */
        __be32 oldest_block_index;      /* word index of oldest surviving */
        __be32 requested_rewind;        /* how many blocks rewind was done */
        __be32 reserved_space;          /* internal */
        __be32 min_free;                /* min free space since stream start */
        __be32 blocks_written[2];       /* total blocks written (64 bit) */
        __be32 words_written[2];        /* total words written (64 bit) */
};

struct wm_adsp_compr;

struct wm_adsp_compr_buf {
        struct wm_adsp *dsp;
        struct wm_adsp_compr *compr;

        struct wm_adsp_buffer_region *regions;
        u32 host_buf_ptr;

        u32 error;
        u32 irq_count;
        int read_index;
        int avail;
};

struct wm_adsp_compr {
        struct wm_adsp *dsp;
        struct wm_adsp_compr_buf *buf;

        struct snd_compr_stream *stream;
        struct snd_compressed_buffer size;

        u32 *raw_buf;
        unsigned int copied_total;

        unsigned int sample_rate;
};

#define WM_ADSP_DATA_WORD_SIZE         3

#define WM_ADSP_MIN_FRAGMENTS          1
#define WM_ADSP_MAX_FRAGMENTS          256
#define WM_ADSP_MIN_FRAGMENT_SIZE      (64 * WM_ADSP_DATA_WORD_SIZE)
#define WM_ADSP_MAX_FRAGMENT_SIZE      (4096 * WM_ADSP_DATA_WORD_SIZE)

#define WM_ADSP_ALG_XM_STRUCT_MAGIC    0x49aec7

#define HOST_BUFFER_FIELD(field) \
        (offsetof(struct wm_adsp_buffer, field) / sizeof(__be32))

#define ALG_XM_FIELD(field) \
        (offsetof(struct wm_adsp_alg_xm_struct, field) / sizeof(__be32))

static int wm_adsp_buffer_init(struct wm_adsp *dsp);
static int wm_adsp_buffer_free(struct wm_adsp *dsp);

struct wm_adsp_buffer_region {
        unsigned int offset;
        unsigned int cumulative_size;
        unsigned int mem_type;
        unsigned int base_addr;
};

struct wm_adsp_buffer_region_def {
        unsigned int mem_type;
        unsigned int base_offset;
        unsigned int size_offset;
};

static const struct wm_adsp_buffer_region_def default_regions[] = {
        {
                .mem_type = WMFW_ADSP2_XM,
                .base_offset = HOST_BUFFER_FIELD(X_buf_base),
                .size_offset = HOST_BUFFER_FIELD(X_buf_size),
        },
        {
                .mem_type = WMFW_ADSP2_XM,
                .base_offset = HOST_BUFFER_FIELD(X_buf_base2),
                .size_offset = HOST_BUFFER_FIELD(X_buf_brk),
        },
        {
                .mem_type = WMFW_ADSP2_YM,
                .base_offset = HOST_BUFFER_FIELD(Y_buf_base),
                .size_offset = HOST_BUFFER_FIELD(wrap),
        },
};

struct wm_adsp_fw_caps {
        u32 id;
        struct snd_codec_desc desc;
        int num_regions;
        const struct wm_adsp_buffer_region_def *region_defs;
};

static const struct wm_adsp_fw_caps ctrl_caps[] = {
        {
                .id = SND_AUDIOCODEC_BESPOKE,
                .desc = {
                        .max_ch = 1,
                        .sample_rates = { 16000 },
                        .num_sample_rates = 1,
                        .formats = SNDRV_PCM_FMTBIT_S16_LE,
                },
                .num_regions = ARRAY_SIZE(default_regions),
                .region_defs = default_regions,
        },
};

static const struct wm_adsp_fw_caps trace_caps[] = {
        {
                .id = SND_AUDIOCODEC_BESPOKE,
                .desc = {
                        .max_ch = 8,
                        .sample_rates = {
                                4000, 8000, 11025, 12000, 16000, 22050,
                                24000, 32000, 44100, 48000, 64000, 88200,
                                96000, 176400, 192000
                        },
                        .num_sample_rates = 15,
                        .formats = SNDRV_PCM_FMTBIT_S16_LE,
                },
                .num_regions = ARRAY_SIZE(default_regions),
                .region_defs = default_regions,
        },
};

static const struct {
        const char *file;
        int compr_direction;
        int num_caps;
        const struct wm_adsp_fw_caps *caps;
        bool voice_trigger;
} wm_adsp_fw[WM_ADSP_NUM_FW] = {
        [WM_ADSP_FW_MBC_VSS] =  { .file = "mbc-vss" },
        [WM_ADSP_FW_HIFI] =     { .file = "hifi" },
        [WM_ADSP_FW_TX] =       { .file = "tx" },
        [WM_ADSP_FW_TX_SPK] =   { .file = "tx-spk" },
        [WM_ADSP_FW_RX] =       { .file = "rx" },
        [WM_ADSP_FW_RX_ANC] =   { .file = "rx-anc" },
        [WM_ADSP_FW_CTRL] =     {
                .file = "ctrl",
                .compr_direction = SND_COMPRESS_CAPTURE,
                .num_caps = ARRAY_SIZE(ctrl_caps),
                .caps = ctrl_caps,
                .voice_trigger = true,
        },
        [WM_ADSP_FW_ASR] =      { .file = "asr" },
        [WM_ADSP_FW_TRACE] =    {
                .file = "trace",
                .compr_direction = SND_COMPRESS_CAPTURE,
                .num_caps = ARRAY_SIZE(trace_caps),
                .caps = trace_caps,
        },
        [WM_ADSP_FW_SPK_PROT] = { .file = "spk-prot" },
        [WM_ADSP_FW_MISC] =     { .file = "misc" },
};

struct wm_coeff_ctl_ops {
        int (*xget)(struct snd_kcontrol *kcontrol,
                    struct snd_ctl_elem_value *ucontrol);
        int (*xput)(struct snd_kcontrol *kcontrol,
                    struct snd_ctl_elem_value *ucontrol);
        int (*xinfo)(struct snd_kcontrol *kcontrol,
                     struct snd_ctl_elem_info *uinfo);
};

struct wm_coeff_ctl {
        const char *name;
        const char *fw_name;
        struct wm_adsp_alg_region alg_region;
        struct wm_coeff_ctl_ops ops;
        struct wm_adsp *dsp;
        unsigned int enabled:1;
        struct list_head list;
        void *cache;
        unsigned int offset;
        size_t len;
        unsigned int set:1;
        struct snd_kcontrol *kcontrol;
        struct soc_bytes_ext bytes_ext;
        unsigned int flags;
};

#ifdef CONFIG_DEBUG_FS
static void wm_adsp_debugfs_save_wmfwname(struct wm_adsp *dsp, const char *s)
{
        char *tmp = kasprintf(GFP_KERNEL, "%s\n", s);

        kfree(dsp->wmfw_file_name);
        dsp->wmfw_file_name = tmp;
}

static void wm_adsp_debugfs_save_binname(struct wm_adsp *dsp, const char *s)
{
        char *tmp = kasprintf(GFP_KERNEL, "%s\n", s);

        kfree(dsp->bin_file_name);
        dsp->bin_file_name = tmp;
}

static void wm_adsp_debugfs_clear(struct wm_adsp *dsp)
{
        kfree(dsp->wmfw_file_name);
        kfree(dsp->bin_file_name);
        dsp->wmfw_file_name = NULL;
        dsp->bin_file_name = NULL;
}

static ssize_t wm_adsp_debugfs_wmfw_read(struct file *file,
                                         char __user *user_buf,
                                         size_t count, loff_t *ppos)
{
        struct wm_adsp *dsp = file->private_data;
        ssize_t ret;

        mutex_lock(&dsp->pwr_lock);

        if (!dsp->wmfw_file_name || !dsp->booted)
                ret = 0;
        else
                ret = simple_read_from_buffer(user_buf, count, ppos,
                                              dsp->wmfw_file_name,
                                              strlen(dsp->wmfw_file_name));

        mutex_unlock(&dsp->pwr_lock);
        return ret;
}

static ssize_t wm_adsp_debugfs_bin_read(struct file *file,
                                        char __user *user_buf,
                                        size_t count, loff_t *ppos)
{
        struct wm_adsp *dsp = file->private_data;
        ssize_t ret;

        mutex_lock(&dsp->pwr_lock);

        if (!dsp->bin_file_name || !dsp->booted)
                ret = 0;
        else
                ret = simple_read_from_buffer(user_buf, count, ppos,
                                              dsp->bin_file_name,
                                              strlen(dsp->bin_file_name));

        mutex_unlock(&dsp->pwr_lock);
        return ret;
}

static const struct {
        const char *name;
        const struct file_operations fops;
} wm_adsp_debugfs_fops[] = {
        {
                .name = "wmfw_file_name",
                .fops = {
                        .open = simple_open,
                        .read = wm_adsp_debugfs_wmfw_read,
                },
        },
        {
                .name = "bin_file_name",
                .fops = {
                        .open = simple_open,
                        .read = wm_adsp_debugfs_bin_read,
                },
        },
};

static void wm_adsp2_init_debugfs(struct wm_adsp *dsp,
                                  struct snd_soc_codec *codec)
{
        struct dentry *root = NULL;
        char *root_name;
        int i;

        if (!codec->component.debugfs_root) {
                adsp_err(dsp, "No codec debugfs root\n");
                goto err;
        }

        root_name = kmalloc(PAGE_SIZE, GFP_KERNEL);
        if (!root_name)
                goto err;

        snprintf(root_name, PAGE_SIZE, "dsp%d", dsp->num);
        root = debugfs_create_dir(root_name, codec->component.debugfs_root);
        kfree(root_name);

        if (!root)
                goto err;

        if (!debugfs_create_bool("booted", S_IRUGO, root, &dsp->booted))
                goto err;

        if (!debugfs_create_bool("running", S_IRUGO, root, &dsp->running))
                goto err;

        if (!debugfs_create_x32("fw_id", S_IRUGO, root, &dsp->fw_id))
                goto err;

        if (!debugfs_create_x32("fw_version", S_IRUGO, root,
                                &dsp->fw_id_version))
                goto err;

        for (i = 0; i < ARRAY_SIZE(wm_adsp_debugfs_fops); ++i) {
                if (!debugfs_create_file(wm_adsp_debugfs_fops[i].name,
                                         S_IRUGO, root, dsp,
                                         &wm_adsp_debugfs_fops[i].fops))
                        goto err;
        }

        dsp->debugfs_root = root;
        return;

err:
        debugfs_remove_recursive(root);
        adsp_err(dsp, "Failed to create debugfs\n");
}

static void wm_adsp2_cleanup_debugfs(struct wm_adsp *dsp)
{
        wm_adsp_debugfs_clear(dsp);
        debugfs_remove_recursive(dsp->debugfs_root);
}
#else
static inline void wm_adsp2_init_debugfs(struct wm_adsp *dsp,
                                         struct snd_soc_codec *codec)
{
}

static inline void wm_adsp2_cleanup_debugfs(struct wm_adsp *dsp)
{
}

static inline void wm_adsp_debugfs_save_wmfwname(struct wm_adsp *dsp,
                                                 const char *s)
{
}

static inline void wm_adsp_debugfs_save_binname(struct wm_adsp *dsp,
                                                const char *s)
{
}

static inline void wm_adsp_debugfs_clear(struct wm_adsp *dsp)
{
}
#endif

static int wm_adsp_fw_get(struct snd_kcontrol *kcontrol,
                          struct snd_ctl_elem_value *ucontrol)
{
        struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
        struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
        struct wm_adsp *dsp = snd_soc_codec_get_drvdata(codec);

        ucontrol->value.enumerated.item[0] = dsp[e->shift_l].fw;

        return 0;
}

static int wm_adsp_fw_put(struct snd_kcontrol *kcontrol,
                          struct snd_ctl_elem_value *ucontrol)
{
        struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
        struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
        struct wm_adsp *dsp = snd_soc_codec_get_drvdata(codec);
        int ret = 0;

        if (ucontrol->value.enumerated.item[0] == dsp[e->shift_l].fw)
                return 0;

        if (ucontrol->value.enumerated.item[0] >= WM_ADSP_NUM_FW)
                return -EINVAL;

        mutex_lock(&dsp[e->shift_l].pwr_lock);

        if (dsp[e->shift_l].booted || dsp[e->shift_l].compr)
                ret = -EBUSY;
        else
                dsp[e->shift_l].fw = ucontrol->value.enumerated.item[0];

        mutex_unlock(&dsp[e->shift_l].pwr_lock);

        return ret;
}

static const struct soc_enum wm_adsp_fw_enum[] = {
        SOC_ENUM_SINGLE(0, 0, ARRAY_SIZE(wm_adsp_fw_text), wm_adsp_fw_text),
        SOC_ENUM_SINGLE(0, 1, ARRAY_SIZE(wm_adsp_fw_text), wm_adsp_fw_text),
        SOC_ENUM_SINGLE(0, 2, ARRAY_SIZE(wm_adsp_fw_text), wm_adsp_fw_text),
        SOC_ENUM_SINGLE(0, 3, ARRAY_SIZE(wm_adsp_fw_text), wm_adsp_fw_text),
};

const struct snd_kcontrol_new wm_adsp_fw_controls[] = {
        SOC_ENUM_EXT("DSP1 Firmware", wm_adsp_fw_enum[0],
                     wm_adsp_fw_get, wm_adsp_fw_put),
        SOC_ENUM_EXT("DSP2 Firmware", wm_adsp_fw_enum[1],
                     wm_adsp_fw_get, wm_adsp_fw_put),
        SOC_ENUM_EXT("DSP3 Firmware", wm_adsp_fw_enum[2],
                     wm_adsp_fw_get, wm_adsp_fw_put),
        SOC_ENUM_EXT("DSP4 Firmware", wm_adsp_fw_enum[3],
                     wm_adsp_fw_get, wm_adsp_fw_put),
};
EXPORT_SYMBOL_GPL(wm_adsp_fw_controls);

static struct wm_adsp_region const *wm_adsp_find_region(struct wm_adsp *dsp,
                                                        int type)
{
        int i;

        for (i = 0; i < dsp->num_mems; i++)
                if (dsp->mem[i].type == type)
                        return &dsp->mem[i];

        return NULL;
}

static unsigned int wm_adsp_region_to_reg(struct wm_adsp_region const *mem,
                                          unsigned int offset)
{
        if (WARN_ON(!mem))
                return offset;
        switch (mem->type) {
        case WMFW_ADSP1_PM:
                return mem->base + (offset * 3);
        case WMFW_ADSP1_DM:
                return mem->base + (offset * 2);
        case WMFW_ADSP2_XM:
                return mem->base + (offset * 2);
        case WMFW_ADSP2_YM:
                return mem->base + (offset * 2);
        case WMFW_ADSP1_ZM:
                return mem->base + (offset * 2);
        default:
                WARN(1, "Unknown memory region type");
                return offset;
        }
}

static void wm_adsp2_show_fw_status(struct wm_adsp *dsp)
{
        u16 scratch[4];
        int ret;

        ret = regmap_raw_read(dsp->regmap, dsp->base + ADSP2_SCRATCH0,
                                scratch, sizeof(scratch));
        if (ret) {
                adsp_err(dsp, "Failed to read SCRATCH regs: %d\n", ret);
                return;
        }

        adsp_dbg(dsp, "FW SCRATCH 0:0x%x 1:0x%x 2:0x%x 3:0x%x\n",
                 be16_to_cpu(scratch[0]),
                 be16_to_cpu(scratch[1]),
                 be16_to_cpu(scratch[2]),
                 be16_to_cpu(scratch[3]));
}

static inline struct wm_coeff_ctl *bytes_ext_to_ctl(struct soc_bytes_ext *ext)
{
        return container_of(ext, struct wm_coeff_ctl, bytes_ext);
}

static int wm_coeff_info(struct snd_kcontrol *kctl,
                         struct snd_ctl_elem_info *uinfo)
{
        struct soc_bytes_ext *bytes_ext =
                (struct soc_bytes_ext *)kctl->private_value;
        struct wm_coeff_ctl *ctl = bytes_ext_to_ctl(bytes_ext);

        uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
        uinfo->count = ctl->len;
        return 0;
}

static int wm_coeff_write_control(struct wm_coeff_ctl *ctl,
                                  const void *buf, size_t len)
{
        struct wm_adsp_alg_region *alg_region = &ctl->alg_region;
        const struct wm_adsp_region *mem;
        struct wm_adsp *dsp = ctl->dsp;
        void *scratch;
        int ret;
        unsigned int reg;

        mem = wm_adsp_find_region(dsp, alg_region->type);
        if (!mem) {
                adsp_err(dsp, "No base for region %x\n",
                         alg_region->type);
                return -EINVAL;
        }

        reg = ctl->alg_region.base + ctl->offset;
        reg = wm_adsp_region_to_reg(mem, reg);

        scratch = kmemdup(buf, len, GFP_KERNEL | GFP_DMA);
        if (!scratch)
                return -ENOMEM;

        ret = regmap_raw_write(dsp->regmap, reg, scratch,
                               len);
        if (ret) {
                adsp_err(dsp, "Failed to write %zu bytes to %x: %d\n",
                         len, reg, ret);
                kfree(scratch);
                return ret;
        }
        adsp_dbg(dsp, "Wrote %zu bytes to %x\n", len, reg);

        kfree(scratch);

        return 0;
}

static int wm_coeff_put(struct snd_kcontrol *kctl,
                        struct snd_ctl_elem_value *ucontrol)
{
        struct soc_bytes_ext *bytes_ext =
                (struct soc_bytes_ext *)kctl->private_value;
        struct wm_coeff_ctl *ctl = bytes_ext_to_ctl(bytes_ext);
        char *p = ucontrol->value.bytes.data;
        int ret = 0;

        mutex_lock(&ctl->dsp->pwr_lock);

        memcpy(ctl->cache, p, ctl->len);

        ctl->set = 1;
        if (ctl->enabled && ctl->dsp->running)
                ret = wm_coeff_write_control(ctl, p, ctl->len);

        mutex_unlock(&ctl->dsp->pwr_lock);

        return ret;
}

static int wm_coeff_tlv_put(struct snd_kcontrol *kctl,
                            const unsigned int __user *bytes, unsigned int size)
{
        struct soc_bytes_ext *bytes_ext =
                (struct soc_bytes_ext *)kctl->private_value;
        struct wm_coeff_ctl *ctl = bytes_ext_to_ctl(bytes_ext);
        int ret = 0;

        mutex_lock(&ctl->dsp->pwr_lock);

        if (copy_from_user(ctl->cache, bytes, size)) {
                ret = -EFAULT;
        } else {
                ctl->set = 1;
                if (ctl->enabled && ctl->dsp->running)
                        ret = wm_coeff_write_control(ctl, ctl->cache, size);
        }

        mutex_unlock(&ctl->dsp->pwr_lock);

        return ret;
}

static int wm_coeff_read_control(struct wm_coeff_ctl *ctl,
                                 void *buf, size_t len)
{
        struct wm_adsp_alg_region *alg_region = &ctl->alg_region;
        const struct wm_adsp_region *mem;
        struct wm_adsp *dsp = ctl->dsp;
        void *scratch;
        int ret;
        unsigned int reg;

        mem = wm_adsp_find_region(dsp, alg_region->type);
        if (!mem) {
                adsp_err(dsp, "No base for region %x\n",
                         alg_region->type);
                return -EINVAL;
        }

        reg = ctl->alg_region.base + ctl->offset;
        reg = wm_adsp_region_to_reg(mem, reg);

        scratch = kmalloc(len, GFP_KERNEL | GFP_DMA);
        if (!scratch)
                return -ENOMEM;

        ret = regmap_raw_read(dsp->regmap, reg, scratch, len);
        if (ret) {
                adsp_err(dsp, "Failed to read %zu bytes from %x: %d\n",
                         len, reg, ret);
                kfree(scratch);
                return ret;
        }
        adsp_dbg(dsp, "Read %zu bytes from %x\n", len, reg);

        memcpy(buf, scratch, len);
        kfree(scratch);

        return 0;
}

static int wm_coeff_get(struct snd_kcontrol *kctl,
                        struct snd_ctl_elem_value *ucontrol)
{
        struct soc_bytes_ext *bytes_ext =
                (struct soc_bytes_ext *)kctl->private_value;
        struct wm_coeff_ctl *ctl = bytes_ext_to_ctl(bytes_ext);
        char *p = ucontrol->value.bytes.data;
        int ret = 0;

        mutex_lock(&ctl->dsp->pwr_lock);

        if (ctl->flags & WMFW_CTL_FLAG_VOLATILE) {
                if (ctl->enabled && ctl->dsp->running)
                        ret = wm_coeff_read_control(ctl, p, ctl->len);
                else
                        ret = -EPERM;
        } else {
                if (!ctl->flags && ctl->enabled && ctl->dsp->running)
                        ret = wm_coeff_read_control(ctl, ctl->cache, ctl->len);

                memcpy(p, ctl->cache, ctl->len);
        }

        mutex_unlock(&ctl->dsp->pwr_lock);

        return ret;
}

static int wm_coeff_tlv_get(struct snd_kcontrol *kctl,
                            unsigned int __user *bytes, unsigned int size)
{
        struct soc_bytes_ext *bytes_ext =
                (struct soc_bytes_ext *)kctl->private_value;
        struct wm_coeff_ctl *ctl = bytes_ext_to_ctl(bytes_ext);
        int ret = 0;

        mutex_lock(&ctl->dsp->pwr_lock);

        if (ctl->flags & WMFW_CTL_FLAG_VOLATILE) {
                if (ctl->enabled && ctl->dsp->running)
                        ret = wm_coeff_read_control(ctl, ctl->cache, size);
                else
                        ret = -EPERM;
        } else {
                if (!ctl->flags && ctl->enabled && ctl->dsp->running)
                        ret = wm_coeff_read_control(ctl, ctl->cache, size);
        }

        if (!ret && copy_to_user(bytes, ctl->cache, size))
                ret = -EFAULT;

        mutex_unlock(&ctl->dsp->pwr_lock);

        return ret;
}

struct wmfw_ctl_work {
        struct wm_adsp *dsp;
        struct wm_coeff_ctl *ctl;
        struct work_struct work;
};

static unsigned int wmfw_convert_flags(unsigned int in, unsigned int len)
{
        unsigned int out, rd, wr, vol;

        if (len > ADSP_MAX_STD_CTRL_SIZE) {
                rd = SNDRV_CTL_ELEM_ACCESS_TLV_READ;
                wr = SNDRV_CTL_ELEM_ACCESS_TLV_WRITE;
                vol = SNDRV_CTL_ELEM_ACCESS_VOLATILE;

                out = SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK;
        } else {
                rd = SNDRV_CTL_ELEM_ACCESS_READ;
                wr = SNDRV_CTL_ELEM_ACCESS_WRITE;
                vol = SNDRV_CTL_ELEM_ACCESS_VOLATILE;

                out = 0;
        }

        if (in) {
                if (in & WMFW_CTL_FLAG_READABLE)
                        out |= rd;
                if (in & WMFW_CTL_FLAG_WRITEABLE)
                        out |= wr;
                if (in & WMFW_CTL_FLAG_VOLATILE)
                        out |= vol;
        } else {
                out |= rd | wr | vol;
        }

        return out;
}

static int wmfw_add_ctl(struct wm_adsp *dsp, struct wm_coeff_ctl *ctl)
{
        struct snd_kcontrol_new *kcontrol;
        int ret;

        if (!ctl || !ctl->name)
                return -EINVAL;

        kcontrol = kzalloc(sizeof(*kcontrol), GFP_KERNEL);
        if (!kcontrol)
                return -ENOMEM;
        kcontrol->iface = SNDRV_CTL_ELEM_IFACE_MIXER;

        kcontrol->name = ctl->name;
        kcontrol->info = wm_coeff_info;
        kcontrol->get = wm_coeff_get;
        kcontrol->put = wm_coeff_put;
        kcontrol->iface = SNDRV_CTL_ELEM_IFACE_MIXER;
        kcontrol->tlv.c = snd_soc_bytes_tlv_callback;
        kcontrol->private_value = (unsigned long)&ctl->bytes_ext;

        ctl->bytes_ext.max = ctl->len;
        ctl->bytes_ext.get = wm_coeff_tlv_get;
        ctl->bytes_ext.put = wm_coeff_tlv_put;

        kcontrol->access = wmfw_convert_flags(ctl->flags, ctl->len);

        ret = snd_soc_add_card_controls(dsp->card, kcontrol, 1);
        if (ret < 0)
                goto err_kcontrol;

        kfree(kcontrol);

        ctl->kcontrol = snd_soc_card_get_kcontrol(dsp->card, ctl->name);

        return 0;

err_kcontrol:
        kfree(kcontrol);
        return ret;
}

static int wm_coeff_init_control_caches(struct wm_adsp *dsp)
{
        struct wm_coeff_ctl *ctl;
        int ret;

        list_for_each_entry(ctl, &dsp->ctl_list, list) {
                if (!ctl->enabled || ctl->set)
                        continue;
                if (ctl->flags & WMFW_CTL_FLAG_VOLATILE)
                        continue;

                ret = wm_coeff_read_control(ctl, ctl->cache, ctl->len);
                if (ret < 0)
                        return ret;
        }

        return 0;
}

static int wm_coeff_sync_controls(struct wm_adsp *dsp)
{
        struct wm_coeff_ctl *ctl;
        int ret;

        list_for_each_entry(ctl, &dsp->ctl_list, list) {
                if (!ctl->enabled)
                        continue;
                if (ctl->set && !(ctl->flags & WMFW_CTL_FLAG_VOLATILE)) {
                        ret = wm_coeff_write_control(ctl, ctl->cache, ctl->len);
                        if (ret < 0)
                                return ret;
                }
        }

        return 0;
}

static void wm_adsp_ctl_work(struct work_struct *work)
{
        struct wmfw_ctl_work *ctl_work = container_of(work,
                                                      struct wmfw_ctl_work,
                                                      work);

        wmfw_add_ctl(ctl_work->dsp, ctl_work->ctl);
        kfree(ctl_work);
}

static void wm_adsp_free_ctl_blk(struct wm_coeff_ctl *ctl)
{
        kfree(ctl->cache);
        kfree(ctl->name);
        kfree(ctl);
}

static int wm_adsp_create_control(struct wm_adsp *dsp,
                                  const struct wm_adsp_alg_region *alg_region,
                                  unsigned int offset, unsigned int len,
                                  const char *subname, unsigned int subname_len,
                                  unsigned int flags)
{
        struct wm_coeff_ctl *ctl;
        struct wmfw_ctl_work *ctl_work;
        char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
        char *region_name;
        int ret;

        if (flags & WMFW_CTL_FLAG_SYS)
                return 0;

        switch (alg_region->type) {
        case WMFW_ADSP1_PM:
                region_name = "PM";
                break;
        case WMFW_ADSP1_DM:
                region_name = "DM";
                break;
        case WMFW_ADSP2_XM:
                region_name = "XM";
                break;
        case WMFW_ADSP2_YM:
                region_name = "YM";
                break;
        case WMFW_ADSP1_ZM:
                region_name = "ZM";
                break;
        default:
                adsp_err(dsp, "Unknown region type: %d\n", alg_region->type);
                return -EINVAL;
        }

        switch (dsp->fw_ver) {
        case 0:
        case 1:
                snprintf(name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN, "DSP%d %s %x",
                         dsp->num, region_name, alg_region->alg);
                break;
        default:
                ret = snprintf(name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN,
                                "DSP%d%c %.12s %x", dsp->num, *region_name,
                                wm_adsp_fw_text[dsp->fw], alg_region->alg);

                /* Truncate the subname from the start if it is too long */
                if (subname) {
                        int avail = SNDRV_CTL_ELEM_ID_NAME_MAXLEN - ret - 2;
                        int skip = 0;

                        if (subname_len > avail)
                                skip = subname_len - avail;

                        snprintf(name + ret,
                                 SNDRV_CTL_ELEM_ID_NAME_MAXLEN - ret, " %.*s",
                                 subname_len - skip, subname + skip);
                }
                break;
        }

        list_for_each_entry(ctl, &dsp->ctl_list, list) {
                if (!strcmp(ctl->name, name)) {
                        if (!ctl->enabled)
                                ctl->enabled = 1;
                        return 0;
                }
        }

        ctl = kzalloc(sizeof(*ctl), GFP_KERNEL);
        if (!ctl)
                return -ENOMEM;
        ctl->fw_name = wm_adsp_fw_text[dsp->fw];
        ctl->alg_region = *alg_region;
        ctl->name = kmemdup(name, strlen(name) + 1, GFP_KERNEL);
        if (!ctl->name) {
                ret = -ENOMEM;
                goto err_ctl;
        }
        ctl->enabled = 1;
        ctl->set = 0;
        ctl->ops.xget = wm_coeff_get;
        ctl->ops.xput = wm_coeff_put;
        ctl->dsp = dsp;

        ctl->flags = flags;
        ctl->offset = offset;
        ctl->len = len;
        ctl->cache = kzalloc(ctl->len, GFP_KERNEL);
        if (!ctl->cache) {
                ret = -ENOMEM;
                goto err_ctl_name;
        }

        list_add(&ctl->list, &dsp->ctl_list);

        ctl_work = kzalloc(sizeof(*ctl_work), GFP_KERNEL);
        if (!ctl_work) {
                ret = -ENOMEM;
                goto err_ctl_cache;
        }

        ctl_work->dsp = dsp;
        ctl_work->ctl = ctl;
        INIT_WORK(&ctl_work->work, wm_adsp_ctl_work);
        schedule_work(&ctl_work->work);

        return 0;

err_ctl_cache:
        kfree(ctl->cache);
err_ctl_name:
        kfree(ctl->name);
err_ctl:
        kfree(ctl);

        return ret;
}

struct wm_coeff_parsed_alg {
        int id;
        const u8 *name;
        int name_len;
        int ncoeff;
};

struct wm_coeff_parsed_coeff {
        int offset;
        int mem_type;
        const u8 *name;
        int name_len;
        int ctl_type;
        int flags;
        int len;
};

static int wm_coeff_parse_string(int bytes, const u8 **pos, const u8 **str)
{
        int length;

        switch (bytes) {
        case 1:
                length = **pos;
                break;
        case 2:
                length = le16_to_cpu(*((__le16 *)*pos));
                break;
        default:
                return 0;
        }

        if (str)
                *str = *pos + bytes;

        *pos += ((length + bytes) + 3) & ~0x03;

        return length;
}

static int wm_coeff_parse_int(int bytes, const u8 **pos)
{
        int val = 0;

        switch (bytes) {
        case 2:
                val = le16_to_cpu(*((__le16 *)*pos));
                break;
        case 4:
                val = le32_to_cpu(*((__le32 *)*pos));
                break;
        default:
                break;
        }

        *pos += bytes;

        return val;
}

static inline void wm_coeff_parse_alg(struct wm_adsp *dsp, const u8 **data,
                                      struct wm_coeff_parsed_alg *blk)
{
        const struct wmfw_adsp_alg_data *raw;

        switch (dsp->fw_ver) {
        case 0:
        case 1:
                raw = (const struct wmfw_adsp_alg_data *)*data;
                *data = raw->data;

                blk->id = le32_to_cpu(raw->id);
                blk->name = raw->name;
                blk->name_len = strlen(raw->name);
                blk->ncoeff = le32_to_cpu(raw->ncoeff);
                break;
        default:
                blk->id = wm_coeff_parse_int(sizeof(raw->id), data);
                blk->name_len = wm_coeff_parse_string(sizeof(u8), data,
                                                      &blk->name);
                wm_coeff_parse_string(sizeof(u16), data, NULL);
                blk->ncoeff = wm_coeff_parse_int(sizeof(raw->ncoeff), data);
                break;
        }

        adsp_dbg(dsp, "Algorithm ID: %#x\n", blk->id);
        adsp_dbg(dsp, "Algorithm name: %.*s\n", blk->name_len, blk->name);
        adsp_dbg(dsp, "# of coefficient descriptors: %#x\n", blk->ncoeff);
}

static inline void wm_coeff_parse_coeff(struct wm_adsp *dsp, const u8 **data,
                                        struct wm_coeff_parsed_coeff *blk)
{
        const struct wmfw_adsp_coeff_data *raw;
        const u8 *tmp;
        int length;

        switch (dsp->fw_ver) {
        case 0:
        case 1:
                raw = (const struct wmfw_adsp_coeff_data *)*data;
                *data = *data + sizeof(raw->hdr) + le32_to_cpu(raw->hdr.size);

                blk->offset = le16_to_cpu(raw->hdr.offset);
                blk->mem_type = le16_to_cpu(raw->hdr.type);
                blk->name = raw->name;
                blk->name_len = strlen(raw->name);
                blk->ctl_type = le16_to_cpu(raw->ctl_type);
                blk->flags = le16_to_cpu(raw->flags);
                blk->len = le32_to_cpu(raw->len);
                break;
        default:
                tmp = *data;
                blk->offset = wm_coeff_parse_int(sizeof(raw->hdr.offset), &tmp);
                blk->mem_type = wm_coeff_parse_int(sizeof(raw->hdr.type), &tmp);
                length = wm_coeff_parse_int(sizeof(raw->hdr.size), &tmp);
                blk->name_len = wm_coeff_parse_string(sizeof(u8), &tmp,
                                                      &blk->name);
                wm_coeff_parse_string(sizeof(u8), &tmp, NULL);
                wm_coeff_parse_string(sizeof(u16), &tmp, NULL);
                blk->ctl_type = wm_coeff_parse_int(sizeof(raw->ctl_type), &tmp);
                blk->flags = wm_coeff_parse_int(sizeof(raw->flags), &tmp);
                blk->len = wm_coeff_parse_int(sizeof(raw->len), &tmp);

                *data = *data + sizeof(raw->hdr) + length;
                break;
        }

        adsp_dbg(dsp, "\tCoefficient type: %#x\n", blk->mem_type);
        adsp_dbg(dsp, "\tCoefficient offset: %#x\n", blk->offset);
        adsp_dbg(dsp, "\tCoefficient name: %.*s\n", blk->name_len, blk->name);
        adsp_dbg(dsp, "\tCoefficient flags: %#x\n", blk->flags);
        adsp_dbg(dsp, "\tALSA control type: %#x\n", blk->ctl_type);
        adsp_dbg(dsp, "\tALSA control len: %#x\n", blk->len);
}

static int wm_adsp_parse_coeff(struct wm_adsp *dsp,
                               const struct wmfw_region *region)
{
        struct wm_adsp_alg_region alg_region = {};
        struct wm_coeff_parsed_alg alg_blk;
        struct wm_coeff_parsed_coeff coeff_blk;
        const u8 *data = region->data;
        int i, ret;

        wm_coeff_parse_alg(dsp, &data, &alg_blk);
        for (i = 0; i < alg_blk.ncoeff; i++) {
                wm_coeff_parse_coeff(dsp, &data, &coeff_blk);

                switch (coeff_blk.ctl_type) {
                case SNDRV_CTL_ELEM_TYPE_BYTES:
                        break;
                default:
                        adsp_err(dsp, "Unknown control type: %d\n",
                                 coeff_blk.ctl_type);
                        return -EINVAL;
                }

                alg_region.type = coeff_blk.mem_type;
                alg_region.alg = alg_blk.id;

                ret = wm_adsp_create_control(dsp, &alg_region,
                                             coeff_blk.offset,
                                             coeff_blk.len,
                                             coeff_blk.name,
                                             coeff_blk.name_len,
                                             coeff_blk.flags);
                if (ret < 0)
                        adsp_err(dsp, "Failed to create control: %.*s, %d\n",
                                 coeff_blk.name_len, coeff_blk.name, ret);
        }

        return 0;
}

static int wm_adsp_load(struct wm_adsp *dsp)
{
        LIST_HEAD(buf_list);
        const struct firmware *firmware;
        struct regmap *regmap = dsp->regmap;
        unsigned int pos = 0;
        const struct wmfw_header *header;
        const struct wmfw_adsp1_sizes *adsp1_sizes;
        const struct wmfw_adsp2_sizes *adsp2_sizes;
        const struct wmfw_footer *footer;
        const struct wmfw_region *region;
        const struct wm_adsp_region *mem;
        const char *region_name;
        char *file, *text;
        struct wm_adsp_buf *buf;
        unsigned int reg;
        int regions = 0;
        int ret, offset, type, sizes;

        file = kzalloc(PAGE_SIZE, GFP_KERNEL);
        if (file == NULL)
                return -ENOMEM;

        snprintf(file, PAGE_SIZE, "%s-dsp%d-%s.wmfw", dsp->part, dsp->num,
                 wm_adsp_fw[dsp->fw].file);
        file[PAGE_SIZE - 1] = '\0';

        ret = request_firmware(&firmware, file, dsp->dev);
        if (ret != 0) {
                adsp_err(dsp, "Failed to request '%s'\n", file);
                goto out;
        }
        ret = -EINVAL;

        pos = sizeof(*header) + sizeof(*adsp1_sizes) + sizeof(*footer);
        if (pos >= firmware->size) {
                adsp_err(dsp, "%s: file too short, %zu bytes\n",
                         file, firmware->size);
                goto out_fw;
        }

        header = (void *)&firmware->data[0];

        if (memcmp(&header->magic[0], "WMFW", 4) != 0) {
                adsp_err(dsp, "%s: invalid magic\n", file);
                goto out_fw;
        }

        switch (header->ver) {
        case 0:
                adsp_warn(dsp, "%s: Depreciated file format %d\n",
                          file, header->ver);
                break;
        case 1:
        case 2:
                break;
        default:
                adsp_err(dsp, "%s: unknown file format %d\n",
                         file, header->ver);
                goto out_fw;
        }

        adsp_info(dsp, "Firmware version: %d\n", header->ver);
        dsp->fw_ver = header->ver;

        if (header->core != dsp->type) {
                adsp_err(dsp, "%s: invalid core %d != %d\n",
                         file, header->core, dsp->type);
                goto out_fw;
        }

        switch (dsp->type) {
        case WMFW_ADSP1:
                pos = sizeof(*header) + sizeof(*adsp1_sizes) + sizeof(*footer);
                adsp1_sizes = (void *)&(header[1]);
                footer = (void *)&(adsp1_sizes[1]);
                sizes = sizeof(*adsp1_sizes);

                adsp_dbg(dsp, "%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));
                break;

        case WMFW_ADSP2:
                pos = sizeof(*header) + sizeof(*adsp2_sizes) + sizeof(*footer);
                adsp2_sizes = (void *)&(header[1]);
                footer = (void *)&(adsp2_sizes[1]);
                sizes = sizeof(*adsp2_sizes);

                adsp_dbg(dsp, "%s: %d XM, %d YM %d PM, %d ZM\n",
                         file, le32_to_cpu(adsp2_sizes->xm),
                         le32_to_cpu(adsp2_sizes->ym),
                         le32_to_cpu(adsp2_sizes->pm),
                         le32_to_cpu(adsp2_sizes->zm));
                break;

        default:
                WARN(1, "Unknown DSP type");
                goto out_fw;
        }

        if (le32_to_cpu(header->len) != sizeof(*header) +
            sizes + sizeof(*footer)) {
                adsp_err(dsp, "%s: unexpected header length %d\n",
                         file, le32_to_cpu(header->len));
                goto out_fw;
        }

        adsp_dbg(dsp, "%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;
                mem = wm_adsp_find_region(dsp, type);

                switch (type) {
                case WMFW_NAME_TEXT:
                        region_name = "Firmware name";
                        text = kzalloc(le32_to_cpu(region->len) + 1,
                                       GFP_KERNEL);
                        break;
                case WMFW_ALGORITHM_DATA:
                        region_name = "Algorithm";
                        ret = wm_adsp_parse_coeff(dsp, region);
                        if (ret != 0)
                                goto out_fw;
                        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 = wm_adsp_region_to_reg(mem, offset);
                        break;
                case WMFW_ADSP1_DM:
                        region_name = "DM";
                        reg = wm_adsp_region_to_reg(mem, offset);
                        break;
                case WMFW_ADSP2_XM:
                        region_name = "XM";
                        reg = wm_adsp_region_to_reg(mem, offset);
                        break;
                case WMFW_ADSP2_YM:
                        region_name = "YM";
                        reg = wm_adsp_region_to_reg(mem, offset);
                        break;
                case WMFW_ADSP1_ZM:
                        region_name = "ZM";
                        reg = wm_adsp_region_to_reg(mem, offset);
                        break;
                default:
                        adsp_warn(dsp,
                                  "%s.%d: Unknown region type %x at %d(%x)\n",
                                  file, regions, type, pos, pos);
                        break;
                }

                adsp_dbg(dsp, "%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));
                        adsp_info(dsp, "%s: %s\n", file, text);
                        kfree(text);
                }

                if (reg) {
                        buf = wm_adsp_buf_alloc(region->data,
                                                le32_to_cpu(region->len),
                                                &buf_list);
                        if (!buf) {
                                adsp_err(dsp, "Out of memory\n");
                                ret = -ENOMEM;
                                goto out_fw;
                        }

                        ret = regmap_raw_write_async(regmap, reg, buf->buf,
                                                     le32_to_cpu(region->len));
                        if (ret != 0) {
                                adsp_err(dsp,
                                        "%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_fw;
                        }
                }

                pos += le32_to_cpu(region->len) + sizeof(*region);
                regions++;
        }

        ret = regmap_async_complete(regmap);
        if (ret != 0) {
                adsp_err(dsp, "Failed to complete async write: %d\n", ret);
                goto out_fw;
        }

        if (pos > firmware->size)
                adsp_warn(dsp, "%s.%d: %zu bytes at end of file\n",
                          file, regions, pos - firmware->size);

        wm_adsp_debugfs_save_wmfwname(dsp, file);

out_fw:
        regmap_async_complete(regmap);
        wm_adsp_buf_free(&buf_list);
        release_firmware(firmware);
out:
        kfree(file);

        return ret;
}

static void wm_adsp_ctl_fixup_base(struct wm_adsp *dsp,
                                  const struct wm_adsp_alg_region *alg_region)
{
        struct wm_coeff_ctl *ctl;

        list_for_each_entry(ctl, &dsp->ctl_list, list) {
                if (ctl->fw_name == wm_adsp_fw_text[dsp->fw] &&
                    alg_region->alg == ctl->alg_region.alg &&
                    alg_region->type == ctl->alg_region.type) {
                        ctl->alg_region.base = alg_region->base;
                }
        }
}

static void *wm_adsp_read_algs(struct wm_adsp *dsp, size_t n_algs,
                               unsigned int pos, unsigned int len)
{
        void *alg;
        int ret;
        __be32 val;

        if (n_algs == 0) {
                adsp_err(dsp, "No algorithms\n");
                return ERR_PTR(-EINVAL);
        }

        if (n_algs > 1024) {
                adsp_err(dsp, "Algorithm count %zx excessive\n", n_algs);
                return ERR_PTR(-EINVAL);
        }

        /* Read the terminator first to validate the length */
        ret = regmap_raw_read(dsp->regmap, pos + len, &val, sizeof(val));
        if (ret != 0) {
                adsp_err(dsp, "Failed to read algorithm list end: %d\n",
                        ret);
                return ERR_PTR(ret);
        }

        if (be32_to_cpu(val) != 0xbedead)
                adsp_warn(dsp, "Algorithm list end %x 0x%x != 0xbeadead\n",
                          pos + len, be32_to_cpu(val));

        alg = kzalloc(len * 2, GFP_KERNEL | GFP_DMA);
        if (!alg)
                return ERR_PTR(-ENOMEM);

        ret = regmap_raw_read(dsp->regmap, pos, alg, len * 2);
        if (ret != 0) {
                adsp_err(dsp, "Failed to read algorithm list: %d\n", ret);
                kfree(alg);
                return ERR_PTR(ret);
        }

        return alg;
}

static struct wm_adsp_alg_region *
        wm_adsp_find_alg_region(struct wm_adsp *dsp, int type, unsigned int id)
{
        struct wm_adsp_alg_region *alg_region;

        list_for_each_entry(alg_region, &dsp->alg_regions, list) {
                if (id == alg_region->alg && type == alg_region->type)
                        return alg_region;
        }

        return NULL;
}

static struct wm_adsp_alg_region *wm_adsp_create_region(struct wm_adsp *dsp,
                                                        int type, __be32 id,
                                                        __be32 base)
{
        struct wm_adsp_alg_region *alg_region;

        alg_region = kzalloc(sizeof(*alg_region), GFP_KERNEL);
        if (!alg_region)
                return ERR_PTR(-ENOMEM);

        alg_region->type = type;
        alg_region->alg = be32_to_cpu(id);
        alg_region->base = be32_to_cpu(base);

        list_add_tail(&alg_region->list, &dsp->alg_regions);

        if (dsp->fw_ver > 0)
                wm_adsp_ctl_fixup_base(dsp, alg_region);

        return alg_region;
}

static void wm_adsp_free_alg_regions(struct wm_adsp *dsp)
{
        struct wm_adsp_alg_region *alg_region;

        while (!list_empty(&dsp->alg_regions)) {
                alg_region = list_first_entry(&dsp->alg_regions,
                                              struct wm_adsp_alg_region,
                                              list);
                list_del(&alg_region->list);
                kfree(alg_region);
        }
}

static int wm_adsp1_setup_algs(struct wm_adsp *dsp)
{
        struct wmfw_adsp1_id_hdr adsp1_id;
        struct wmfw_adsp1_alg_hdr *adsp1_alg;
        struct wm_adsp_alg_region *alg_region;
        const struct wm_adsp_region *mem;
        unsigned int pos, len;
        size_t n_algs;
        int i, ret;

        mem = wm_adsp_find_region(dsp, WMFW_ADSP1_DM);
        if (WARN_ON(!mem))
                return -EINVAL;

        ret = regmap_raw_read(dsp->regmap, mem->base, &adsp1_id,
                              sizeof(adsp1_id));
        if (ret != 0) {
                adsp_err(dsp, "Failed to read algorithm info: %d\n",
                         ret);
                return ret;
        }

        n_algs = be32_to_cpu(adsp1_id.n_algs);
        dsp->fw_id = be32_to_cpu(adsp1_id.fw.id);
        adsp_info(dsp, "Firmware: %x v%d.%d.%d, %zu algorithms\n",
                  dsp->fw_id,
                  (be32_to_cpu(adsp1_id.fw.ver) & 0xff0000) >> 16,
                  (be32_to_cpu(adsp1_id.fw.ver) & 0xff00) >> 8,
                  be32_to_cpu(adsp1_id.fw.ver) & 0xff,
                  n_algs);

        alg_region = wm_adsp_create_region(dsp, WMFW_ADSP1_ZM,
                                           adsp1_id.fw.id, adsp1_id.zm);
        if (IS_ERR(alg_region))
                return PTR_ERR(alg_region);

        alg_region = wm_adsp_create_region(dsp, WMFW_ADSP1_DM,
                                           adsp1_id.fw.id, adsp1_id.dm);
        if (IS_ERR(alg_region))
                return PTR_ERR(alg_region);

        pos = sizeof(adsp1_id) / 2;
        len = (sizeof(*adsp1_alg) * n_algs) / 2;

        adsp1_alg = wm_adsp_read_algs(dsp, n_algs, mem->base + pos, len);
        if (IS_ERR(adsp1_alg))
                return PTR_ERR(adsp1_alg);

        for (i = 0; i < n_algs; i++) {
                adsp_info(dsp, "%d: ID %x v%d.%d.%d DM@%x ZM@%x\n",
                          i, be32_to_cpu(adsp1_alg[i].alg.id),
                          (be32_to_cpu(adsp1_alg[i].alg.ver) & 0xff0000) >> 16,
                          (be32_to_cpu(adsp1_alg[i].alg.ver) & 0xff00) >> 8,
                          be32_to_cpu(adsp1_alg[i].alg.ver) & 0xff,
                          be32_to_cpu(adsp1_alg[i].dm),
                          be32_to_cpu(adsp1_alg[i].zm));

                alg_region = wm_adsp_create_region(dsp, WMFW_ADSP1_DM,
                                                   adsp1_alg[i].alg.id,
                                                   adsp1_alg[i].dm);
                if (IS_ERR(alg_region)) {
                        ret = PTR_ERR(alg_region);
                        goto out;
                }
                if (dsp->fw_ver == 0) {
                        if (i + 1 < n_algs) {
                                len = be32_to_cpu(adsp1_alg[i + 1].dm);
                                len -= be32_to_cpu(adsp1_alg[i].dm);
                                len *= 4;
                                wm_adsp_create_control(dsp, alg_region, 0,
                                                       len, NULL, 0, 0);
                        } else {
                                adsp_warn(dsp, "Missing length info for region DM with ID %x\n",
                                          be32_to_cpu(adsp1_alg[i].alg.id));
                        }
                }

                alg_region = wm_adsp_create_region(dsp, WMFW_ADSP1_ZM,
                                                   adsp1_alg[i].alg.id,
                                                   adsp1_alg[i].zm);
                if (IS_ERR(alg_region)) {
                        ret = PTR_ERR(alg_region);
                        goto out;
                }
                if (dsp->fw_ver == 0) {
                        if (i + 1 < n_algs) {
                                len = be32_to_cpu(adsp1_alg[i + 1].zm);
                                len -= be32_to_cpu(adsp1_alg[i].zm);
                                len *= 4;
                                wm_adsp_create_control(dsp, alg_region, 0,
                                                       len, NULL, 0, 0);
                        } else {
                                adsp_warn(dsp, "Missing length info for region ZM with ID %x\n",
                                          be32_to_cpu(adsp1_alg[i].alg.id));
                        }
                }
        }

out:
        kfree(adsp1_alg);
        return ret;
}

static int wm_adsp2_setup_algs(struct wm_adsp *dsp)
{
        struct wmfw_adsp2_id_hdr adsp2_id;
        struct wmfw_adsp2_alg_hdr *adsp2_alg;
        struct wm_adsp_alg_region *alg_region;
        const struct wm_adsp_region *mem;
        unsigned int pos, len;
        size_t n_algs;
        int i, ret;

        mem = wm_adsp_find_region(dsp, WMFW_ADSP2_XM);
        if (WARN_ON(!mem))
                return -EINVAL;

        ret = regmap_raw_read(dsp->regmap, mem->base, &adsp2_id,
                              sizeof(adsp2_id));
        if (ret != 0) {
                adsp_err(dsp, "Failed to read algorithm info: %d\n",
                         ret);
                return ret;
        }

        n_algs = be32_to_cpu(adsp2_id.n_algs);
        dsp->fw_id = be32_to_cpu(adsp2_id.fw.id);
        dsp->fw_id_version = be32_to_cpu(adsp2_id.fw.ver);
        adsp_info(dsp, "Firmware: %x v%d.%d.%d, %zu algorithms\n",
                  dsp->fw_id,
                  (dsp->fw_id_version & 0xff0000) >> 16,
                  (dsp->fw_id_version & 0xff00) >> 8,
                  dsp->fw_id_version & 0xff,
                  n_algs);

        alg_region = wm_adsp_create_region(dsp, WMFW_ADSP2_XM,
                                           adsp2_id.fw.id, adsp2_id.xm);
        if (IS_ERR(alg_region))
                return PTR_ERR(alg_region);

        alg_region = wm_adsp_create_region(dsp, WMFW_ADSP2_YM,
                                           adsp2_id.fw.id, adsp2_id.ym);
        if (IS_ERR(alg_region))
                return PTR_ERR(alg_region);

        alg_region = wm_adsp_create_region(dsp, WMFW_ADSP2_ZM,
                                           adsp2_id.fw.id, adsp2_id.zm);
        if (IS_ERR(alg_region))
                return PTR_ERR(alg_region);

        pos = sizeof(adsp2_id) / 2;
        len = (sizeof(*adsp2_alg) * n_algs) / 2;

        adsp2_alg = wm_adsp_read_algs(dsp, n_algs, mem->base + pos, len);
        if (IS_ERR(adsp2_alg))
                return PTR_ERR(adsp2_alg);

        for (i = 0; i < n_algs; i++) {
                adsp_info(dsp,
                          "%d: ID %x v%d.%d.%d XM@%x YM@%x ZM@%x\n",
                          i, be32_to_cpu(adsp2_alg[i].alg.id),
                          (be32_to_cpu(adsp2_alg[i].alg.ver) & 0xff0000) >> 16,
                          (be32_to_cpu(adsp2_alg[i].alg.ver) & 0xff00) >> 8,
                          be32_to_cpu(adsp2_alg[i].alg.ver) & 0xff,
                          be32_to_cpu(adsp2_alg[i].xm),
                          be32_to_cpu(adsp2_alg[i].ym),
                          be32_to_cpu(adsp2_alg[i].zm));

                alg_region = wm_adsp_create_region(dsp, WMFW_ADSP2_XM,
                                                   adsp2_alg[i].alg.id,
                                                   adsp2_alg[i].xm);
                if (IS_ERR(alg_region)) {
                        ret = PTR_ERR(alg_region);
                        goto out;
                }
                if (dsp->fw_ver == 0) {
                        if (i + 1 < n_algs) {
                                len = be32_to_cpu(adsp2_alg[i + 1].xm);
                                len -= be32_to_cpu(adsp2_alg[i].xm);
                                len *= 4;
                                wm_adsp_create_control(dsp, alg_region, 0,
                                                       len, NULL, 0, 0);
                        } else {
                                adsp_warn(dsp, "Missing length info for region XM with ID %x\n",
                                          be32_to_cpu(adsp2_alg[i].alg.id));
                        }
                }

                alg_region = wm_adsp_create_region(dsp, WMFW_ADSP2_YM,
                                                   adsp2_alg[i].alg.id,
                                                   adsp2_alg[i].ym);
                if (IS_ERR(alg_region)) {
                        ret = PTR_ERR(alg_region);
                        goto out;
                }
                if (dsp->fw_ver == 0) {
                        if (i + 1 < n_algs) {
                                len = be32_to_cpu(adsp2_alg[i + 1].ym);
                                len -= be32_to_cpu(adsp2_alg[i].ym);
                                len *= 4;
                                wm_adsp_create_control(dsp, alg_region, 0,
                                                       len, NULL, 0, 0);
                        } else {
                                adsp_warn(dsp, "Missing length info for region YM with ID %x\n",
                                          be32_to_cpu(adsp2_alg[i].alg.id));
                        }
                }

                alg_region = wm_adsp_create_region(dsp, WMFW_ADSP2_ZM,
                                                   adsp2_alg[i].alg.id,
                                                   adsp2_alg[i].zm);
                if (IS_ERR(alg_region)) {
                        ret = PTR_ERR(alg_region);
                        goto out;
                }
                if (dsp->fw_ver == 0) {
                        if (i + 1 < n_algs) {
                                len = be32_to_cpu(adsp2_alg[i + 1].zm);
                                len -= be32_to_cpu(adsp2_alg[i].zm);
                                len *= 4;
                                wm_adsp_create_control(dsp, alg_region, 0,
                                                       len, NULL, 0, 0);
                        } else {
                                adsp_warn(dsp, "Missing length info for region ZM with ID %x\n",
                                          be32_to_cpu(adsp2_alg[i].alg.id));
                        }
                }
        }

out:
        kfree(adsp2_alg);
        return ret;
}

static int wm_adsp_load_coeff(struct wm_adsp *dsp)
{
        LIST_HEAD(buf_list);
        struct regmap *regmap = dsp->regmap;
        struct wmfw_coeff_hdr *hdr;
        struct wmfw_coeff_item *blk;
        const struct firmware *firmware;
        const struct wm_adsp_region *mem;
        struct wm_adsp_alg_region *alg_region;
        const char *region_name;
        int ret, pos, blocks, type, offset, reg;
        char *file;
        struct wm_adsp_buf *buf;

        file = kzalloc(PAGE_SIZE, GFP_KERNEL);
        if (file == NULL)
                return -ENOMEM;

        snprintf(file, PAGE_SIZE, "%s-dsp%d-%s.bin", dsp->part, dsp->num,
                 wm_adsp_fw[dsp->fw].file);
        file[PAGE_SIZE - 1] = '\0';

        ret = request_firmware(&firmware, file, dsp->dev);
        if (ret != 0) {
                adsp_warn(dsp, "Failed to request '%s'\n", file);
                ret = 0;
                goto out;
        }
        ret = -EINVAL;

        if (sizeof(*hdr) >= firmware->size) {
                adsp_err(dsp, "%s: file too short, %zu bytes\n",
                        file, firmware->size);
                goto out_fw;
        }

        hdr = (void *)&firmware->data[0];
        if (memcmp(hdr->magic, "WMDR", 4) != 0) {
                adsp_err(dsp, "%s: invalid magic\n", file);
                goto out_fw;
        }

        switch (be32_to_cpu(hdr->rev) & 0xff) {
        case 1:
                break;
        default:
                adsp_err(dsp, "%s: Unsupported coefficient file format %d\n",
                         file, be32_to_cpu(hdr->rev) & 0xff);
                ret = -EINVAL;
                goto out_fw;
        }

        adsp_dbg(dsp, "%s: v%d.%d.%d\n", file,
                (le32_to_cpu(hdr->ver) >> 16) & 0xff,
                (le32_to_cpu(hdr->ver) >>  8) & 0xff,
                le32_to_cpu(hdr->ver) & 0xff);

        pos = le32_to_cpu(hdr->len);

        blocks = 0;
        while (pos < firmware->size &&
               pos - firmware->size > sizeof(*blk)) {
                blk = (void *)(&firmware->data[pos]);

                type = le16_to_cpu(blk->type);
                offset = le16_to_cpu(blk->offset);

                adsp_dbg(dsp, "%s.%d: %x v%d.%d.%d\n",
                         file, blocks, le32_to_cpu(blk->id),
                         (le32_to_cpu(blk->ver) >> 16) & 0xff,
                         (le32_to_cpu(blk->ver) >>  8) & 0xff,
                         le32_to_cpu(blk->ver) & 0xff);
                adsp_dbg(dsp, "%s.%d: %d bytes at 0x%x in %x\n",
                         file, blocks, le32_to_cpu(blk->len), offset, type);

                reg = 0;
                region_name = "Unknown";
                switch (type) {
                case (WMFW_NAME_TEXT << 8):
                case (WMFW_INFO_TEXT << 8):
                        break;
                case (WMFW_ABSOLUTE << 8):
                        /*
                         * Old files may use this for global

                         * coefficients.
                         */
                        if (le32_to_cpu(blk->id) == dsp->fw_id &&
                            offset == 0) {
                                region_name = "global coefficients";
                                mem = wm_adsp_find_region(dsp, type);
                                if (!mem) {
                                        adsp_err(dsp, "No ZM\n");
                                        break;
                                }
                                reg = wm_adsp_region_to_reg(mem, 0);

                        } else {
                                region_name = "register";
                                reg = offset;
                        }
                        break;

                case WMFW_ADSP1_DM:
                case WMFW_ADSP1_ZM:
                case WMFW_ADSP2_XM:
                case WMFW_ADSP2_YM:
                        adsp_dbg(dsp, "%s.%d: %d bytes in %x for %x\n",
                                 file, blocks, le32_to_cpu(blk->len),
                                 type, le32_to_cpu(blk->id));

                        mem = wm_adsp_find_region(dsp, type);
                        if (!mem) {
                                adsp_err(dsp, "No base for region %x\n", type);
                                break;
                        }

                        alg_region = wm_adsp_find_alg_region(dsp, type,
                                                le32_to_cpu(blk->id));
                        if (alg_region) {
                                reg = alg_region->base;
                                reg = wm_adsp_region_to_reg(mem, reg);
                                reg += offset;
                        } else {
                                adsp_err(dsp, "No %x for algorithm %x\n",
                                         type, le32_to_cpu(blk->id));
                        }
                        break;

                default:
                        adsp_err(dsp, "%s.%d: Unknown region type %x at %d\n",
                                 file, blocks, type, pos);
                        break;
                }

                if (reg) {
                        buf = wm_adsp_buf_alloc(blk->data,
                                                le32_to_cpu(blk->len),
                                                &buf_list);
                        if (!buf) {
                                adsp_err(dsp, "Out of memory\n");
                                ret = -ENOMEM;
                                goto out_fw;
                        }

                        adsp_dbg(dsp, "%s.%d: Writing %d bytes at %x\n",
                                 file, blocks, le32_to_cpu(blk->len),
                                 reg);
                        ret = regmap_raw_write_async(regmap, reg, buf->buf,
                                                     le32_to_cpu(blk->len));
                        if (ret != 0) {
                                adsp_err(dsp,
                                        "%s.%d: Failed to write to %x in %s: %d\n",
                                        file, blocks, reg, region_name, ret);
                        }
                }

                pos += (le32_to_cpu(blk->len) + sizeof(*blk) + 3) & ~0x03;
                blocks++;
        }

        ret = regmap_async_complete(regmap);
        if (ret != 0)
                adsp_err(dsp, "Failed to complete async write: %d\n", ret);

        if (pos > firmware->size)
                adsp_warn(dsp, "%s.%d: %zu bytes at end of file\n",
                          file, blocks, pos - firmware->size);

        wm_adsp_debugfs_save_binname(dsp, file);

out_fw:
        regmap_async_complete(regmap);
        release_firmware(firmware);
        wm_adsp_buf_free(&buf_list);
out:
        kfree(file);
        return ret;
}

int wm_adsp1_init(struct wm_adsp *dsp)
{
        INIT_LIST_HEAD(&dsp->alg_regions);

        mutex_init(&dsp->pwr_lock);

        return 0;
}
EXPORT_SYMBOL_GPL(wm_adsp1_init);

int wm_adsp1_event(struct snd_soc_dapm_widget *w,
                   struct snd_kcontrol *kcontrol,
                   int event)
{
        struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
        struct wm_adsp *dsps = snd_soc_codec_get_drvdata(codec);
        struct wm_adsp *dsp = &dsps[w->shift];
        struct wm_coeff_ctl *ctl;
        int ret;
        unsigned int val;

        dsp->card = codec->component.card;

        mutex_lock(&dsp->pwr_lock);

        switch (event) {
        case SND_SOC_DAPM_POST_PMU:
                regmap_update_bits(dsp->regmap, dsp->base + ADSP1_CONTROL_30,
                                   ADSP1_SYS_ENA, ADSP1_SYS_ENA);

                /*
                 * For simplicity set the DSP clock rate to be the
                 * SYSCLK rate rather than making it configurable.
                 */
                if (dsp->sysclk_reg) {
                        ret = regmap_read(dsp->regmap, dsp->sysclk_reg, &val);
                        if (ret != 0) {
                                adsp_err(dsp, "Failed to read SYSCLK state: %d\n",
                                ret);
                                goto err_mutex;
                        }

                        val = (val & dsp->sysclk_mask) >> dsp->sysclk_shift;

                        ret = regmap_update_bits(dsp->regmap,
                                                 dsp->base + ADSP1_CONTROL_31,
                                                 ADSP1_CLK_SEL_MASK, val);
                        if (ret != 0) {
                                adsp_err(dsp, "Failed to set clock rate: %d\n",
                                         ret);
                                goto err_mutex;
                        }
                }

                ret = wm_adsp_load(dsp);
                if (ret != 0)
                        goto err_ena;

                ret = wm_adsp1_setup_algs(dsp);
                if (ret != 0)
                        goto err_ena;

                ret = wm_adsp_load_coeff(dsp);
                if (ret != 0)
                        goto err_ena;

                /* Initialize caches for enabled and unset controls */
                ret = wm_coeff_init_control_caches(dsp);
                if (ret != 0)
                        goto err_ena;

                /* Sync set controls */
                ret = wm_coeff_sync_controls(dsp);
                if (ret != 0)
                        goto err_ena;

                dsp->booted = true;

                /* Start the core running */
                regmap_update_bits(dsp->regmap, dsp->base + ADSP1_CONTROL_30,
                                   ADSP1_CORE_ENA | ADSP1_START,
                                   ADSP1_CORE_ENA | ADSP1_START);

                dsp->running = true;
                break;

        case SND_SOC_DAPM_PRE_PMD:
                dsp->running = false;
                dsp->booted = false;

                /* Halt the core */
                regmap_update_bits(dsp->regmap, dsp->base + ADSP1_CONTROL_30,
                                   ADSP1_CORE_ENA | ADSP1_START, 0);

                regmap_update_bits(dsp->regmap, dsp->base + ADSP1_CONTROL_19,
                                   ADSP1_WDMA_BUFFER_LENGTH_MASK, 0);

                regmap_update_bits(dsp->regmap, dsp->base + ADSP1_CONTROL_30,
                                   ADSP1_SYS_ENA, 0);

                list_for_each_entry(ctl, &dsp->ctl_list, list)
                        ctl->enabled = 0;


                wm_adsp_free_alg_regions(dsp);
                break;

        default:
                break;
        }

        mutex_unlock(&dsp->pwr_lock);

        return 0;

err_ena:
        regmap_update_bits(dsp->regmap, dsp->base + ADSP1_CONTROL_30,
                           ADSP1_SYS_ENA, 0);
err_mutex:
        mutex_unlock(&dsp->pwr_lock);

        return ret;
}
EXPORT_SYMBOL_GPL(wm_adsp1_event);

static int wm_adsp2_ena(struct wm_adsp *dsp)
{
        unsigned int val;
        int ret, count;

        ret = regmap_update_bits_async(dsp->regmap, dsp->base + ADSP2_CONTROL,
                                       ADSP2_SYS_ENA, ADSP2_SYS_ENA);
        if (ret != 0)
                return ret;

        /* Wait for the RAM to start, should be near instantaneous */
        for (count = 0; count < 10; ++count) {
                ret = regmap_read(dsp->regmap, dsp->base + ADSP2_STATUS1, &val);
                if (ret != 0)
                        return ret;

                if (val & ADSP2_RAM_RDY)
                        break;

                usleep_range(250, 500);
        }

        if (!(val & ADSP2_RAM_RDY)) {
                adsp_err(dsp, "Failed to start DSP RAM\n");
                return -EBUSY;
        }

        adsp_dbg(dsp, "RAM ready after %d polls\n", count);

        return 0;
}

static void wm_adsp2_boot_work(struct work_struct *work)
{
        struct wm_adsp *dsp = container_of(work,
                                           struct wm_adsp,
                                           boot_work);
        int ret;

        mutex_lock(&dsp->pwr_lock);

        ret = regmap_update_bits(dsp->regmap, dsp->base + ADSP2_CONTROL,
                                 ADSP2_MEM_ENA, ADSP2_MEM_ENA);
        if (ret != 0)
                goto err_mutex;

        ret = wm_adsp2_ena(dsp);
        if (ret != 0)
                goto err_mutex;

        ret = wm_adsp_load(dsp);
        if (ret != 0)
                goto err_ena;

        ret = wm_adsp2_setup_algs(dsp);
        if (ret != 0)
                goto err_ena;

        ret = wm_adsp_load_coeff(dsp);
        if (ret != 0)
                goto err_ena;

        /* Initialize caches for enabled and unset controls */
        ret = wm_coeff_init_control_caches(dsp);
        if (ret != 0)
                goto err_ena;

        dsp->booted = true;

        /* Turn DSP back off until we are ready to run */
        ret = regmap_update_bits(dsp->regmap, dsp->base + ADSP2_CONTROL,
                                 ADSP2_SYS_ENA, 0);
        if (ret != 0)
                goto err_ena;

        mutex_unlock(&dsp->pwr_lock);

        return;

err_ena:
        regmap_update_bits(dsp->regmap, dsp->base + ADSP2_CONTROL,
                           ADSP2_SYS_ENA | ADSP2_CORE_ENA | ADSP2_START, 0);
err_mutex:
        mutex_unlock(&dsp->pwr_lock);
}

static void wm_adsp2_set_dspclk(struct wm_adsp *dsp, unsigned int freq)
{
        int ret;

        ret = regmap_update_bits_async(dsp->regmap,
                                       dsp->base + ADSP2_CLOCKING,
                                       ADSP2_CLK_SEL_MASK,
                                       freq << ADSP2_CLK_SEL_SHIFT);
        if (ret != 0)
                adsp_err(dsp, "Failed to set clock rate: %d\n", ret);
}

int wm_adsp2_early_event(struct snd_soc_dapm_widget *w,
                         struct snd_kcontrol *kcontrol, int event,
                         unsigned int freq)
{
        struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
        struct wm_adsp *dsps = snd_soc_codec_get_drvdata(codec);
        struct wm_adsp *dsp = &dsps[w->shift];
        struct wm_coeff_ctl *ctl;

        dsp->card = codec->component.card;

        switch (event) {
        case SND_SOC_DAPM_PRE_PMU:
                wm_adsp2_set_dspclk(dsp, freq);
                queue_work(system_unbound_wq, &dsp->boot_work);
                break;
        case SND_SOC_DAPM_PRE_PMD:
                wm_adsp_debugfs_clear(dsp);

                dsp->fw_id = 0;
                dsp->fw_id_version = 0;

                dsp->booted = false;

                regmap_update_bits(dsp->regmap, dsp->base + ADSP2_CONTROL,
                                   ADSP2_MEM_ENA, 0);

                list_for_each_entry(ctl, &dsp->ctl_list, list)
                        ctl->enabled = 0;

                wm_adsp_free_alg_regions(dsp);

                adsp_dbg(dsp, "Shutdown complete\n");
                break;
        default:
                break;
        }

        return 0;
}
EXPORT_SYMBOL_GPL(wm_adsp2_early_event);

int wm_adsp2_event(struct snd_soc_dapm_widget *w,
                   struct snd_kcontrol *kcontrol, int event)
{
        struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
        struct wm_adsp *dsps = snd_soc_codec_get_drvdata(codec);
        struct wm_adsp *dsp = &dsps[w->shift];
        int ret;

        switch (event) {
        case SND_SOC_DAPM_POST_PMU:
                flush_work(&dsp->boot_work);

                if (!dsp->booted)
                        return -EIO;

                ret = wm_adsp2_ena(dsp);
                if (ret != 0)
                        goto err;

                /* Sync set controls */
                ret = wm_coeff_sync_controls(dsp);
                if (ret != 0)
                        goto err;

                ret = regmap_update_bits(dsp->regmap,
                                         dsp->base + ADSP2_CONTROL,
                                         ADSP2_CORE_ENA | ADSP2_START,
                                         ADSP2_CORE_ENA | ADSP2_START);
                if (ret != 0)
                        goto err;

                dsp->running = true;

                mutex_lock(&dsp->pwr_lock);

                if (wm_adsp_fw[dsp->fw].num_caps != 0)
                        ret = wm_adsp_buffer_init(dsp);

                mutex_unlock(&dsp->pwr_lock);

                break;

        case SND_SOC_DAPM_PRE_PMD:
                /* Log firmware state, it can be useful for analysis */
                wm_adsp2_show_fw_status(dsp);

                mutex_lock(&dsp->pwr_lock);

                dsp->running = false;

                regmap_update_bits(dsp->regmap, dsp->base + ADSP2_CONTROL,
                                   ADSP2_CORE_ENA | ADSP2_START, 0);

                /* Make sure DMAs are quiesced */
                regmap_write(dsp->regmap, dsp->base + ADSP2_RDMA_CONFIG_1, 0);
                regmap_write(dsp->regmap, dsp->base + ADSP2_WDMA_CONFIG_1, 0);
                regmap_write(dsp->regmap, dsp->base + ADSP2_WDMA_CONFIG_2, 0);

                regmap_update_bits(dsp->regmap, dsp->base + ADSP2_CONTROL,
                                   ADSP2_SYS_ENA, 0);

                if (wm_adsp_fw[dsp->fw].num_caps != 0)
                        wm_adsp_buffer_free(dsp);

                mutex_unlock(&dsp->pwr_lock);

                adsp_dbg(dsp, "Execution stopped\n");
                break;

        default:
                break;
        }

        return 0;
err:
        regmap_update_bits(dsp->regmap, dsp->base + ADSP2_CONTROL,
                           ADSP2_SYS_ENA | ADSP2_CORE_ENA | ADSP2_START, 0);
        return ret;
}
EXPORT_SYMBOL_GPL(wm_adsp2_event);

int wm_adsp2_codec_probe(struct wm_adsp *dsp, struct snd_soc_codec *codec)
{
        wm_adsp2_init_debugfs(dsp, codec);

        return snd_soc_add_codec_controls(codec,
                                          &wm_adsp_fw_controls[dsp->num - 1],
                                          1);
}
EXPORT_SYMBOL_GPL(wm_adsp2_codec_probe);

int wm_adsp2_codec_remove(struct wm_adsp *dsp, struct snd_soc_codec *codec)
{
        wm_adsp2_cleanup_debugfs(dsp);

        return 0;
}
EXPORT_SYMBOL_GPL(wm_adsp2_codec_remove);

int wm_adsp2_init(struct wm_adsp *dsp)
{
        int ret;

        /*
         * Disable the DSP memory by default when in reset for a small
         * power saving.
         */
        ret = regmap_update_bits(dsp->regmap, dsp->base + ADSP2_CONTROL,
                                 ADSP2_MEM_ENA, 0);
        if (ret != 0) {
                adsp_err(dsp, "Failed to clear memory retention: %d\n", ret);
                return ret;
        }

        INIT_LIST_HEAD(&dsp->alg_regions);
        INIT_LIST_HEAD(&dsp->ctl_list);
        INIT_WORK(&dsp->boot_work, wm_adsp2_boot_work);

        mutex_init(&dsp->pwr_lock);

        return 0;
}
EXPORT_SYMBOL_GPL(wm_adsp2_init);

void wm_adsp2_remove(struct wm_adsp *dsp)
{
        struct wm_coeff_ctl *ctl;

        while (!list_empty(&dsp->ctl_list)) {
                ctl = list_first_entry(&dsp->ctl_list, struct wm_coeff_ctl,
                                        list);
                list_del(&ctl->list);
                wm_adsp_free_ctl_blk(ctl);
        }
}
EXPORT_SYMBOL_GPL(wm_adsp2_remove);

static inline int wm_adsp_compr_attached(struct wm_adsp_compr *compr)
{
        return compr->buf != NULL;
}

static int wm_adsp_compr_attach(struct wm_adsp_compr *compr)
{
        /*
         * Note this will be more complex once each DSP can support multiple
         * streams
         */
        if (!compr->dsp->buffer)
                return -EINVAL;

        compr->buf = compr->dsp->buffer;
        compr->buf->compr = compr;

        return 0;
}

static void wm_adsp_compr_detach(struct wm_adsp_compr *compr)
{
        if (!compr)
                return;

        /* Wake the poll so it can see buffer is no longer attached */
        if (compr->stream)
                snd_compr_fragment_elapsed(compr->stream);

        if (wm_adsp_compr_attached(compr)) {
                compr->buf->compr = NULL;
                compr->buf = NULL;
        }
}

int wm_adsp_compr_open(struct wm_adsp *dsp, struct snd_compr_stream *stream)
{
        struct wm_adsp_compr *compr;
        int ret = 0;

        mutex_lock(&dsp->pwr_lock);

        if (wm_adsp_fw[dsp->fw].num_caps == 0) {
                adsp_err(dsp, "Firmware does not support compressed API\n");
                ret = -ENXIO;
                goto out;
        }

        if (wm_adsp_fw[dsp->fw].compr_direction != stream->direction) {
                adsp_err(dsp, "Firmware does not support stream direction\n");
                ret = -EINVAL;
                goto out;
        }

        if (dsp->compr) {
                /* It is expect this limitation will be removed in future */
                adsp_err(dsp, "Only a single stream supported per DSP\n");
                ret = -EBUSY;
                goto out;
        }

        compr = kzalloc(sizeof(*compr), GFP_KERNEL);
        if (!compr) {
                ret = -ENOMEM;
                goto out;
        }

        compr->dsp = dsp;
        compr->stream = stream;

        dsp->compr = compr;

        stream->runtime->private_data = compr;

out:
        mutex_unlock(&dsp->pwr_lock);

        return ret;
}
EXPORT_SYMBOL_GPL(wm_adsp_compr_open);

int wm_adsp_compr_free(struct snd_compr_stream *stream)
{
        struct wm_adsp_compr *compr = stream->runtime->private_data;
        struct wm_adsp *dsp = compr->dsp;

        mutex_lock(&dsp->pwr_lock);

        wm_adsp_compr_detach(compr);
        dsp->compr = NULL;

        kfree(compr->raw_buf);
        kfree(compr);

        mutex_unlock(&dsp->pwr_lock);

        return 0;
}
EXPORT_SYMBOL_GPL(wm_adsp_compr_free);

static int wm_adsp_compr_check_params(struct snd_compr_stream *stream,
                                      struct snd_compr_params *params)
{
        struct wm_adsp_compr *compr = stream->runtime->private_data;
        struct wm_adsp *dsp = compr->dsp;
        const struct wm_adsp_fw_caps *caps;
        const struct snd_codec_desc *desc;
        int i, j;

        if (params->buffer.fragment_size < WM_ADSP_MIN_FRAGMENT_SIZE ||
            params->buffer.fragment_size > WM_ADSP_MAX_FRAGMENT_SIZE ||
            params->buffer.fragments < WM_ADSP_MIN_FRAGMENTS ||
            params->buffer.fragments > WM_ADSP_MAX_FRAGMENTS ||
            params->buffer.fragment_size % WM_ADSP_DATA_WORD_SIZE) {
                adsp_err(dsp, "Invalid buffer fragsize=%d fragments=%d\n",
                         params->buffer.fragment_size,
                         params->buffer.fragments);

                return -EINVAL;
        }

        for (i = 0; i < wm_adsp_fw[dsp->fw].num_caps; i++) {
                caps = &wm_adsp_fw[dsp->fw].caps[i];
                desc = &caps->desc;

                if (caps->id != params->codec.id)
                        continue;

                if (stream->direction == SND_COMPRESS_PLAYBACK) {
                        if (desc->max_ch < params->codec.ch_out)
                                continue;
                } else {
                        if (desc->max_ch < params->codec.ch_in)
                                continue;
                }

                if (!(desc->formats & (1 << params->codec.format)))
                        continue;

                for (j = 0; j < desc->num_sample_rates; ++j)
                        if (desc->sample_rates[j] == params->codec.sample_rate)
                                return 0;
        }

        adsp_err(dsp, "Invalid params id=%u ch=%u,%u rate=%u fmt=%u\n",
                 params->codec.id, params->codec.ch_in, params->codec.ch_out,
                 params->codec.sample_rate, params->codec.format);
        return -EINVAL;
}

static inline unsigned int wm_adsp_compr_frag_words(struct wm_adsp_compr *compr)
{
        return compr->size.fragment_size / WM_ADSP_DATA_WORD_SIZE;
}

int wm_adsp_compr_set_params(struct snd_compr_stream *stream,
                             struct snd_compr_params *params)
{
        struct wm_adsp_compr *compr = stream->runtime->private_data;
        unsigned int size;
        int ret;

        ret = wm_adsp_compr_check_params(stream, params);
        if (ret)
                return ret;

        compr->size = params->buffer;

        adsp_dbg(compr->dsp, "fragment_size=%d fragments=%d\n",
                 compr->size.fragment_size, compr->size.fragments);

        size = wm_adsp_compr_frag_words(compr) * sizeof(*compr->raw_buf);
        compr->raw_buf = kmalloc(size, GFP_DMA | GFP_KERNEL);
        if (!compr->raw_buf)
                return -ENOMEM;

        compr->sample_rate = params->codec.sample_rate;

        return 0;
}
EXPORT_SYMBOL_GPL(wm_adsp_compr_set_params);

int wm_adsp_compr_get_caps(struct snd_compr_stream *stream,
                           struct snd_compr_caps *caps)
{
        struct wm_adsp_compr *compr = stream->runtime->private_data;
        int fw = compr->dsp->fw;
        int i;

        if (wm_adsp_fw[fw].caps) {
                for (i = 0; i < wm_adsp_fw[fw].num_caps; i++)
                        caps->codecs[i] = wm_adsp_fw[fw].caps[i].id;

                caps->num_codecs = i;
                caps->direction = wm_adsp_fw[fw].compr_direction;

                caps->min_fragment_size = WM_ADSP_MIN_FRAGMENT_SIZE;
                caps->max_fragment_size = WM_ADSP_MAX_FRAGMENT_SIZE;
                caps->min_fragments = WM_ADSP_MIN_FRAGMENTS;
                caps->max_fragments = WM_ADSP_MAX_FRAGMENTS;
        }

        return 0;
}
EXPORT_SYMBOL_GPL(wm_adsp_compr_get_caps);

static int wm_adsp_read_data_block(struct wm_adsp *dsp, int mem_type,
                                   unsigned int mem_addr,
                                   unsigned int num_words, u32 *data)
{
        struct wm_adsp_region const *mem = wm_adsp_find_region(dsp, mem_type);
        unsigned int i, reg;
        int ret;

        if (!mem)
                return -EINVAL;

        reg = wm_adsp_region_to_reg(mem, mem_addr);

        ret = regmap_raw_read(dsp->regmap, reg, data,
                              sizeof(*data) * num_words);
        if (ret < 0)
                return ret;

        for (i = 0; i < num_words; ++i)
                data[i] = be32_to_cpu(data[i]) & 0x00ffffffu;

        return 0;
}

static inline int wm_adsp_read_data_word(struct wm_adsp *dsp, int mem_type,
                                         unsigned int mem_addr, u32 *data)
{
        return wm_adsp_read_data_block(dsp, mem_type, mem_addr, 1, data);
}

static int wm_adsp_write_data_word(struct wm_adsp *dsp, int mem_type,
                                   unsigned int mem_addr, u32 data)
{
        struct wm_adsp_region const *mem = wm_adsp_find_region(dsp, mem_type);
        unsigned int reg;

        if (!mem)
                return -EINVAL;

        reg = wm_adsp_region_to_reg(mem, mem_addr);

        data = cpu_to_be32(data & 0x00ffffffu);

        return regmap_raw_write(dsp->regmap, reg, &data, sizeof(data));
}

static inline int wm_adsp_buffer_read(struct wm_adsp_compr_buf *buf,
                                      unsigned int field_offset, u32 *data)
{
        return wm_adsp_read_data_word(buf->dsp, WMFW_ADSP2_XM,
                                      buf->host_buf_ptr + field_offset, data);
}

static inline int wm_adsp_buffer_write(struct wm_adsp_compr_buf *buf,
                                       unsigned int field_offset, u32 data)
{
        return wm_adsp_write_data_word(buf->dsp, WMFW_ADSP2_XM,
                                       buf->host_buf_ptr + field_offset, data);
}

static int wm_adsp_buffer_locate(struct wm_adsp_compr_buf *buf)
{
        struct wm_adsp_alg_region *alg_region;
        struct wm_adsp *dsp = buf->dsp;
        u32 xmalg, addr, magic;
        int i, ret;

        alg_region = wm_adsp_find_alg_region(dsp, WMFW_ADSP2_XM, dsp->fw_id);
        xmalg = sizeof(struct wm_adsp_system_config_xm_hdr) / sizeof(__be32);

        addr = alg_region->base + xmalg + ALG_XM_FIELD(magic);
        ret = wm_adsp_read_data_word(dsp, WMFW_ADSP2_XM, addr, &magic);
        if (ret < 0)
                return ret;

        if (magic != WM_ADSP_ALG_XM_STRUCT_MAGIC)
                return -EINVAL;

        addr = alg_region->base + xmalg + ALG_XM_FIELD(host_buf_ptr);
        for (i = 0; i < 5; ++i) {
                ret = wm_adsp_read_data_word(dsp, WMFW_ADSP2_XM, addr,
                                             &buf->host_buf_ptr);
                if (ret < 0)
                        return ret;

                if (buf->host_buf_ptr)
                        break;

                usleep_range(1000, 2000);
        }

        if (!buf->host_buf_ptr)
                return -EIO;

        adsp_dbg(dsp, "host_buf_ptr=%x\n", buf->host_buf_ptr);

        return 0;
}

static int wm_adsp_buffer_populate(struct wm_adsp_compr_buf *buf)
{
        const struct wm_adsp_fw_caps *caps = wm_adsp_fw[buf->dsp->fw].caps;
        struct wm_adsp_buffer_region *region;
        u32 offset = 0;
        int i, ret;

        for (i = 0; i < caps->num_regions; ++i) {
                region = &buf->regions[i];

                region->offset = offset;
                region->mem_type = caps->region_defs[i].mem_type;

                ret = wm_adsp_buffer_read(buf, caps->region_defs[i].base_offset,
                                          &region->base_addr);
                if (ret < 0)
                        return ret;

                ret = wm_adsp_buffer_read(buf, caps->region_defs[i].size_offset,
                                          &offset);
                if (ret < 0)
                        return ret;

                region->cumulative_size = offset;

                adsp_dbg(buf->dsp,
                         "region=%d type=%d base=%04x off=%04x size=%04x\n",
                         i, region->mem_type, region->base_addr,
                         region->offset, region->cumulative_size);
        }

        return 0;
}

static int wm_adsp_buffer_init(struct wm_adsp *dsp)
{
        struct wm_adsp_compr_buf *buf;
        int ret;

        buf = kzalloc(sizeof(*buf), GFP_KERNEL);
        if (!buf)
                return -ENOMEM;

        buf->dsp = dsp;
        buf->read_index = -1;
        buf->irq_count = 0xFFFFFFFF;

        ret = wm_adsp_buffer_locate(buf);
        if (ret < 0) {
                adsp_err(dsp, "Failed to acquire host buffer: %d\n", ret);
                goto err_buffer;
        }

        buf->regions = kcalloc(wm_adsp_fw[dsp->fw].caps->num_regions,
                               sizeof(*buf->regions), GFP_KERNEL);
        if (!buf->regions) {
                ret = -ENOMEM;
                goto err_buffer;
        }

        ret = wm_adsp_buffer_populate(buf);
        if (ret < 0) {
                adsp_err(dsp, "Failed to populate host buffer: %d\n", ret);
                goto err_regions;
        }

        dsp->buffer = buf;

        return 0;

err_regions:
        kfree(buf->regions);
err_buffer:
        kfree(buf);
        return ret;
}

static int wm_adsp_buffer_free(struct wm_adsp *dsp)
{
        if (dsp->buffer) {
                wm_adsp_compr_detach(dsp->buffer->compr);

                kfree(dsp->buffer->regions);
                kfree(dsp->buffer);

                dsp->buffer = NULL;
        }

        return 0;
}

int wm_adsp_compr_trigger(struct snd_compr_stream *stream, int cmd)
{
        struct wm_adsp_compr *compr = stream->runtime->private_data;
        struct wm_adsp *dsp = compr->dsp;
        int ret = 0;

        adsp_dbg(dsp, "Trigger: %d\n", cmd);

        mutex_lock(&dsp->pwr_lock);

        switch (cmd) {
        case SNDRV_PCM_TRIGGER_START:
                if (wm_adsp_compr_attached(compr))
                        break;

                ret = wm_adsp_compr_attach(compr);
                if (ret < 0) {
                        adsp_err(dsp, "Failed to link buffer and stream: %d\n",
                                 ret);
                        break;
                }

                /* Trigger the IRQ at one fragment of data */
                ret = wm_adsp_buffer_write(compr->buf,
                                           HOST_BUFFER_FIELD(high_water_mark),
                                           wm_adsp_compr_frag_words(compr));
                if (ret < 0) {
                        adsp_err(dsp, "Failed to set high water mark: %d\n",
                                 ret);
                        break;
                }
                break;
        case SNDRV_PCM_TRIGGER_STOP:
                break;
        default:
                ret = -EINVAL;
                break;
        }

        mutex_unlock(&dsp->pwr_lock);

        return ret;
}
EXPORT_SYMBOL_GPL(wm_adsp_compr_trigger);

static inline int wm_adsp_buffer_size(struct wm_adsp_compr_buf *buf)
{
        int last_region = wm_adsp_fw[buf->dsp->fw].caps->num_regions - 1;

        return buf->regions[last_region].cumulative_size;
}

static int wm_adsp_buffer_update_avail(struct wm_adsp_compr_buf *buf)
{
        u32 next_read_index, next_write_index;
        int write_index, read_index, avail;
        int ret;

        /* Only sync read index if we haven't already read a valid index */
        if (buf->read_index < 0) {
                ret = wm_adsp_buffer_read(buf,
                                HOST_BUFFER_FIELD(next_read_index),
                                &next_read_index);
                if (ret < 0)
                        return ret;

                read_index = sign_extend32(next_read_index, 23);

                if (read_index < 0) {
                        adsp_dbg(buf->dsp, "Avail check on unstarted stream\n");
                        return 0;
                }

                buf->read_index = read_index;
        }

        ret = wm_adsp_buffer_read(buf, HOST_BUFFER_FIELD(next_write_index),
                        &next_write_index);
        if (ret < 0)
                return ret;

        write_index = sign_extend32(next_write_index, 23);

        avail = write_index - buf->read_index;
        if (avail < 0)
                avail += wm_adsp_buffer_size(buf);

        adsp_dbg(buf->dsp, "readindex=0x%x, writeindex=0x%x, avail=%d\n",
                 buf->read_index, write_index, avail * WM_ADSP_DATA_WORD_SIZE);

        buf->avail = avail;

        return 0;
}

static int wm_adsp_buffer_get_error(struct wm_adsp_compr_buf *buf)
{
        int ret;

        ret = wm_adsp_buffer_read(buf, HOST_BUFFER_FIELD(error), &buf->error);
        if (ret < 0) {
                adsp_err(buf->dsp, "Failed to check buffer error: %d\n", ret);
                return ret;
        }
        if (buf->error != 0) {
                adsp_err(buf->dsp, "Buffer error occurred: %d\n", buf->error);
                return -EIO;