diff options
Diffstat (limited to 'sound/soc/codecs/wm0010.c')
| -rw-r--r-- | sound/soc/codecs/wm0010.c | 940 |
1 files changed, 940 insertions, 0 deletions
diff --git a/sound/soc/codecs/wm0010.c b/sound/soc/codecs/wm0010.c new file mode 100644 index 000000000000..99afc003a084 --- /dev/null +++ b/sound/soc/codecs/wm0010.c @@ -0,0 +1,940 @@ +/* + * wm0010.c -- WM0010 DSP Driver + * + * Copyright 2012 Wolfson Microelectronics PLC. + * + * Authors: Mark Brown <broonie@opensource.wolfsonmicro.com> + * Dimitris Papastamos <dp@opensource.wolfsonmicro.com> + * Scott Ling <sl@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/irqreturn.h> +#include <linux/init.h> +#include <linux/spi/spi.h> +#include <linux/firmware.h> +#include <linux/delay.h> +#include <linux/fs.h> +#include <linux/miscdevice.h> +#include <linux/gpio.h> +#include <linux/regulator/consumer.h> +#include <linux/mutex.h> +#include <linux/workqueue.h> + +#include <sound/soc.h> +#include <sound/wm0010.h> + +#define DEVICE_ID_WM0010 10 + +enum dfw_cmd { + DFW_CMD_FUSE = 0x01, + DFW_CMD_CODE_HDR, + DFW_CMD_CODE_DATA, + DFW_CMD_PLL, + DFW_CMD_INFO = 0xff +}; + +struct dfw_binrec { + u8 command; + u32 length:24; + u32 address; + uint8_t data[0]; +} __packed; + +struct dfw_pllrec { + u8 command; + u32 length:24; + u32 address; + u32 clkctrl1; + u32 clkctrl2; + u32 clkctrl3; + u32 ldetctrl; + u32 uart_div; + u32 spi_div; +} __packed; + +static struct pll_clock_map { + int max_sysclk; + int max_pll_spi_speed; + u32 pll_clkctrl1; +} pll_clock_map[] = { /* Dividers */ + { 22000000, 26000000, 0x00201f11 }, /* 2,32,2 */ + { 18000000, 26000000, 0x00203f21 }, /* 2,64,4 */ + { 14000000, 26000000, 0x00202620 }, /* 1,39,4 */ + { 10000000, 22000000, 0x00203120 }, /* 1,50,4 */ + { 6500000, 22000000, 0x00204520 }, /* 1,70,4 */ + { 5500000, 22000000, 0x00103f10 }, /* 1,64,2 */ +}; + +enum wm0010_state { + WM0010_POWER_OFF, + WM0010_OUT_OF_RESET, + WM0010_BOOTROM, + WM0010_STAGE2, + WM0010_FIRMWARE, +}; + +struct wm0010_priv { + struct snd_soc_codec *codec; + + struct mutex lock; + struct device *dev; + + struct wm0010_pdata pdata; + + int gpio_reset; + int gpio_reset_value; + + struct regulator_bulk_data core_supplies[2]; + struct regulator *dbvdd; + + int sysclk; + + enum wm0010_state state; + bool boot_failed; + int boot_done; + bool ready; + bool pll_running; + int max_spi_freq; + int board_max_spi_speed; + u32 pll_clkctrl1; + + spinlock_t irq_lock; + int irq; + + struct completion boot_completion; +}; + +struct wm0010_spi_msg { + struct spi_message m; + struct spi_transfer t; + u8 *tx_buf; + u8 *rx_buf; + size_t len; +}; + +static const struct snd_soc_dapm_widget wm0010_dapm_widgets[] = { +SND_SOC_DAPM_SUPPLY("CLKIN", SND_SOC_NOPM, 0, 0, NULL, 0), +}; + +static const struct snd_soc_dapm_route wm0010_dapm_routes[] = { + { "SDI2 Capture", NULL, "SDI1 Playback" }, + { "SDI1 Capture", NULL, "SDI2 Playback" }, + + { "SDI1 Capture", NULL, "CLKIN" }, + { "SDI2 Capture", NULL, "CLKIN" }, + { "SDI1 Playback", NULL, "CLKIN" }, + { "SDI2 Playback", NULL, "CLKIN" }, +}; + +static const char *wm0010_state_to_str(enum wm0010_state state) +{ + const char *state_to_str[] = { + "Power off", + "Out of reset", + "Boot ROM", + "Stage2", + "Firmware" + }; + + if (state < 0 || state >= ARRAY_SIZE(state_to_str)) + return "null"; + return state_to_str[state]; +} + +/* Called with wm0010->lock held */ +static void wm0010_halt(struct snd_soc_codec *codec) +{ + struct wm0010_priv *wm0010 = snd_soc_codec_get_drvdata(codec); + unsigned long flags; + enum wm0010_state state; + + /* Fetch the wm0010 state */ + spin_lock_irqsave(&wm0010->irq_lock, flags); + state = wm0010->state; + spin_unlock_irqrestore(&wm0010->irq_lock, flags); + + switch (state) { + case WM0010_POWER_OFF: + /* If there's nothing to do, bail out */ + return; + case WM0010_OUT_OF_RESET: + case WM0010_BOOTROM: + case WM0010_STAGE2: + case WM0010_FIRMWARE: + /* Remember to put chip back into reset */ + gpio_set_value_cansleep(wm0010->gpio_reset, + wm0010->gpio_reset_value); + /* Disable the regulators */ + regulator_disable(wm0010->dbvdd); + regulator_bulk_disable(ARRAY_SIZE(wm0010->core_supplies), + wm0010->core_supplies); + break; + } + + spin_lock_irqsave(&wm0010->irq_lock, flags); + wm0010->state = WM0010_POWER_OFF; + spin_unlock_irqrestore(&wm0010->irq_lock, flags); +} + +struct wm0010_boot_xfer { + struct list_head list; + struct snd_soc_codec *codec; + struct completion *done; + struct spi_message m; + struct spi_transfer t; +}; + +/* Called with wm0010->lock held */ +static void wm0010_mark_boot_failure(struct wm0010_priv *wm0010) +{ + enum wm0010_state state; + unsigned long flags; + + spin_lock_irqsave(&wm0010->irq_lock, flags); + state = wm0010->state; + spin_unlock_irqrestore(&wm0010->irq_lock, flags); + + dev_err(wm0010->dev, "Failed to transition from `%s' state to `%s' state\n", + wm0010_state_to_str(state), wm0010_state_to_str(state + 1)); + + wm0010->boot_failed = true; +} + +static void wm0010_boot_xfer_complete(void *data) +{ + struct wm0010_boot_xfer *xfer = data; + struct snd_soc_codec *codec = xfer->codec; + struct wm0010_priv *wm0010 = snd_soc_codec_get_drvdata(codec); + u32 *out32 = xfer->t.rx_buf; + int i; + + if (xfer->m.status != 0) { + dev_err(codec->dev, "SPI transfer failed: %d\n", + xfer->m.status); + wm0010_mark_boot_failure(wm0010); + if (xfer->done) + complete(xfer->done); + return; + } + + for (i = 0; i < xfer->t.len / 4; i++) { + dev_dbg(codec->dev, "%d: %04x\n", i, out32[i]); + + switch (be32_to_cpu(out32[i])) { + case 0xe0e0e0e0: + dev_err(codec->dev, + "%d: ROM error reported in stage 2\n", i); + wm0010_mark_boot_failure(wm0010); + break; + + case 0x55555555: + if (wm0010->boot_done == 0) + break; + dev_err(codec->dev, + "%d: ROM bootloader running in stage 2\n", i); + wm0010_mark_boot_failure(wm0010); + break; + + case 0x0fed0000: + dev_dbg(codec->dev, "Stage2 loader running\n"); + break; + + case 0x0fed0007: + dev_dbg(codec->dev, "CODE_HDR packet received\n"); + break; + + case 0x0fed0008: + dev_dbg(codec->dev, "CODE_DATA packet received\n"); + break; + + case 0x0fed0009: + dev_dbg(codec->dev, "Download complete\n"); + break; + + case 0x0fed000c: + dev_dbg(codec->dev, "Application start\n"); + break; + + case 0x0fed000e: + dev_dbg(codec->dev, "PLL packet received\n"); + wm0010->pll_running = true; + break; + + case 0x0fed0025: + dev_err(codec->dev, "Device reports image too long\n"); + wm0010_mark_boot_failure(wm0010); + break; + + case 0x0fed002c: + dev_err(codec->dev, "Device reports bad SPI packet\n"); + wm0010_mark_boot_failure(wm0010); + break; + + case 0x0fed0031: + dev_err(codec->dev, "Device reports SPI read overflow\n"); + wm0010_mark_boot_failure(wm0010); + break; + + case 0x0fed0032: + dev_err(codec->dev, "Device reports SPI underclock\n"); + wm0010_mark_boot_failure(wm0010); + break; + + case 0x0fed0033: + dev_err(codec->dev, "Device reports bad header packet\n"); + wm0010_mark_boot_failure(wm0010); + break; + + case 0x0fed0034: + dev_err(codec->dev, "Device reports invalid packet type\n"); + wm0010_mark_boot_failure(wm0010); + break; + + case 0x0fed0035: + dev_err(codec->dev, "Device reports data before header error\n"); + wm0010_mark_boot_failure(wm0010); + break; + + case 0x0fed0038: + dev_err(codec->dev, "Device reports invalid PLL packet\n"); + break; + + case 0x0fed003a: + dev_err(codec->dev, "Device reports packet alignment error\n"); + wm0010_mark_boot_failure(wm0010); + break; + + default: + dev_err(codec->dev, "Unrecognised return 0x%x\n", + be32_to_cpu(out32[i])); + wm0010_mark_boot_failure(wm0010); + break; + } + + if (wm0010->boot_failed) + break; + } + + wm0010->boot_done++; + if (xfer->done) + complete(xfer->done); +} + +static void byte_swap_64(u64 *data_in, u64 *data_out, u32 len) +{ + int i; + + for (i = 0; i < len / 8; i++) + data_out[i] = cpu_to_be64(le64_to_cpu(data_in[i])); +} + +static int wm0010_boot(struct snd_soc_codec *codec) +{ + struct spi_device *spi = to_spi_device(codec->dev); + struct wm0010_priv *wm0010 = snd_soc_codec_get_drvdata(codec); + unsigned long flags; + struct list_head xfer_list; + struct wm0010_boot_xfer *xfer; + int ret; + struct completion done; + const struct firmware *fw; + const struct dfw_binrec *rec; + struct spi_message m; + struct spi_transfer t; + struct dfw_pllrec pll_rec; + u32 *img, *p; + u64 *img_swap; + u8 *out; + u32 len, offset; + int i; + + spin_lock_irqsave(&wm0010->irq_lock, flags); + if (wm0010->state != WM0010_POWER_OFF) + dev_warn(wm0010->dev, "DSP already powered up!\n"); + spin_unlock_irqrestore(&wm0010->irq_lock, flags); + + if (wm0010->sysclk > 26000000) { + dev_err(codec->dev, "Max DSP clock frequency is 26MHz\n"); + ret = -ECANCELED; + goto err; + } + + INIT_LIST_HEAD(&xfer_list); + + mutex_lock(&wm0010->lock); + wm0010->pll_running = false; + + dev_dbg(codec->dev, "max_spi_freq: %d\n", wm0010->max_spi_freq); + + ret = regulator_bulk_enable(ARRAY_SIZE(wm0010->core_supplies), + wm0010->core_supplies); + if (ret != 0) { + dev_err(&spi->dev, "Failed to enable core supplies: %d\n", + ret); + mutex_unlock(&wm0010->lock); + goto err; + } + + ret = regulator_enable(wm0010->dbvdd); + if (ret != 0) { + dev_err(&spi->dev, "Failed to enable DBVDD: %d\n", ret); + goto err_core; + } + + /* Release reset */ + gpio_set_value_cansleep(wm0010->gpio_reset, !wm0010->gpio_reset_value); + spin_lock_irqsave(&wm0010->irq_lock, flags); + wm0010->state = WM0010_OUT_OF_RESET; + spin_unlock_irqrestore(&wm0010->irq_lock, flags); + + /* First the bootloader */ + ret = request_firmware(&fw, "wm0010_stage2.bin", codec->dev); + if (ret != 0) { + dev_err(codec->dev, "Failed to request stage2 loader: %d\n", + ret); + goto abort; + } + + if (!wait_for_completion_timeout(&wm0010->boot_completion, + msecs_to_jiffies(10))) + dev_err(codec->dev, "Failed to get interrupt from DSP\n"); + + spin_lock_irqsave(&wm0010->irq_lock, flags); + wm0010->state = WM0010_BOOTROM; + spin_unlock_irqrestore(&wm0010->irq_lock, flags); + + dev_dbg(codec->dev, "Downloading %zu byte stage 2 loader\n", fw->size); + + /* Copy to local buffer first as vmalloc causes problems for dma */ + img = kzalloc(fw->size, GFP_KERNEL); + if (!img) { + dev_err(codec->dev, "Failed to allocate image buffer\n"); + goto abort; + } + + out = kzalloc(fw->size, GFP_KERNEL); + if (!out) { + dev_err(codec->dev, "Failed to allocate output buffer\n"); + goto abort; + } + + memcpy(img, &fw->data[0], fw->size); + + spi_message_init(&m); + memset(&t, 0, sizeof(t)); + t.rx_buf = out; + t.tx_buf = img; + t.len = fw->size; + t.bits_per_word = 8; + t.speed_hz = wm0010->sysclk / 10; + spi_message_add_tail(&t, &m); + + dev_dbg(codec->dev, "Starting initial download at %dHz\n", + t.speed_hz); + + ret = spi_sync(spi, &m); + if (ret != 0) { + dev_err(codec->dev, "Initial download failed: %d\n", ret); + goto abort; + } + + /* Look for errors from the boot ROM */ + for (i = 0; i < fw->size; i++) { + if (out[i] != 0x55) { + ret = -EBUSY; + dev_err(codec->dev, "Boot ROM error: %x in %d\n", + out[i], i); + wm0010_mark_boot_failure(wm0010); + goto abort; + } + } + + release_firmware(fw); + kfree(img); + kfree(out); + + if (!wait_for_completion_timeout(&wm0010->boot_completion, + msecs_to_jiffies(10))) + dev_err(codec->dev, "Failed to get interrupt from DSP loader.\n"); + + spin_lock_irqsave(&wm0010->irq_lock, flags); + wm0010->state = WM0010_STAGE2; + spin_unlock_irqrestore(&wm0010->irq_lock, flags); + + /* Only initialise PLL if max_spi_freq initialised */ + if (wm0010->max_spi_freq) { + + /* Initialise a PLL record */ + memset(&pll_rec, 0, sizeof(pll_rec)); + pll_rec.command = DFW_CMD_PLL; + pll_rec.length = (sizeof(pll_rec) - 8); + + /* On wm0010 only the CLKCTRL1 value is used */ + pll_rec.clkctrl1 = wm0010->pll_clkctrl1; + + len = pll_rec.length + 8; + out = kzalloc(len, GFP_KERNEL); + if (!out) { + dev_err(codec->dev, + "Failed to allocate RX buffer\n"); + goto abort; + } + + img_swap = kzalloc(len, GFP_KERNEL); + if (!img_swap) { + dev_err(codec->dev, + "Failed to allocate image buffer\n"); + goto abort; + } + + /* We need to re-order for 0010 */ + byte_swap_64((u64 *)&pll_rec, img_swap, len); + + spi_message_init(&m); + memset(&t, 0, sizeof(t)); + t.rx_buf = out; + t.tx_buf = img_swap; + t.len = len; + t.bits_per_word = 8; + t.speed_hz = wm0010->sysclk / 6; + spi_message_add_tail(&t, &m); + + ret = spi_sync(spi, &m); + if (ret != 0) { + dev_err(codec->dev, "First PLL write failed: %d\n", ret); + goto abort; + } + + /* Use a second send of the message to get the return status */ + ret = spi_sync(spi, &m); + if (ret != 0) { + dev_err(codec->dev, "Second PLL write failed: %d\n", ret); + goto abort; + } + + p = (u32 *)out; + + /* Look for PLL active code from the DSP */ + for (i = 0; i < len / 4; i++) { + if (*p == 0x0e00ed0f) { + dev_dbg(codec->dev, "PLL packet received\n"); + wm0010->pll_running = true; + break; + } + p++; + } + + kfree(img_swap); + kfree(out); + } else + dev_dbg(codec->dev, "Not enabling DSP PLL."); + + ret = request_firmware(&fw, "wm0010.dfw", codec->dev); + if (ret != 0) { + dev_err(codec->dev, "Failed to request application: %d\n", + ret); + goto abort; + } + + rec = (const struct dfw_binrec *)fw->data; + offset = 0; + wm0010->boot_done = 0; + wm0010->boot_failed = false; + BUG_ON(!list_empty(&xfer_list)); + init_completion(&done); + + /* First record should be INFO */ + if (rec->command != DFW_CMD_INFO) { + dev_err(codec->dev, "First record not INFO\r\n"); + goto abort; + } + + /* Check it's a 0010 file */ + if (rec->data[0] != DEVICE_ID_WM0010) { + dev_err(codec->dev, "Not a WM0010 firmware file.\r\n"); + goto abort; + } + + /* Skip the info record as we don't need to send it */ + offset += ((rec->length) + 8); + rec = (void *)&rec->data[rec->length]; + + while (offset < fw->size) { + dev_dbg(codec->dev, + "Packet: command %d, data length = 0x%x\r\n", + rec->command, rec->length); + len = rec->length + 8; + + out = kzalloc(len, GFP_KERNEL); + if (!out) { + dev_err(codec->dev, + "Failed to allocate RX buffer\n"); + goto abort; + } + + img_swap = kzalloc(len, GFP_KERNEL); + if (!img_swap) { + dev_err(codec->dev, + "Failed to allocate image buffer\n"); + goto abort; + } + + /* We need to re-order for 0010 */ + byte_swap_64((u64 *)&rec->command, img_swap, len); + + xfer = kzalloc(sizeof(*xfer), GFP_KERNEL); + if (!xfer) { + dev_err(codec->dev, "Failed to allocate xfer\n"); + goto abort; + } + + xfer->codec = codec; + list_add_tail(&xfer->list, &xfer_list); + + spi_message_init(&xfer->m); + xfer->m.complete = wm0010_boot_xfer_complete; + xfer->m.context = xfer; + xfer->t.tx_buf = img_swap; + xfer->t.rx_buf = out; + xfer->t.len = len; + xfer->t.bits_per_word = 8; + + if (!wm0010->pll_running) { + xfer->t.speed_hz = wm0010->sysclk / 6; + } else { + xfer->t.speed_hz = wm0010->max_spi_freq; + + if (wm0010->board_max_spi_speed && + (wm0010->board_max_spi_speed < wm0010->max_spi_freq)) + xfer->t.speed_hz = wm0010->board_max_spi_speed; + } + + /* Store max usable spi frequency for later use */ + wm0010->max_spi_freq = xfer->t.speed_hz; + + spi_message_add_tail(&xfer->t, &xfer->m); + + offset += ((rec->length) + 8); + rec = (void *)&rec->data[rec->length]; + + if (offset >= fw->size) { + dev_dbg(codec->dev, "All transfers scheduled\n"); + xfer->done = &done; + } + + ret = spi_async(spi, &xfer->m); + if (ret != 0) { + dev_err(codec->dev, "Write failed: %d\n", ret); + goto abort; + } + + if (wm0010->boot_failed) + goto abort; + } + + wait_for_completion(&done); + + spin_lock_irqsave(&wm0010->irq_lock, flags); + wm0010->state = WM0010_FIRMWARE; + spin_unlock_irqrestore(&wm0010->irq_lock, flags); + + mutex_unlock(&wm0010->lock); + + release_firmware(fw); + + while (!list_empty(&xfer_list)) { + xfer = list_first_entry(&xfer_list, struct wm0010_boot_xfer, + list); + kfree(xfer->t.rx_buf); + kfree(xfer->t.tx_buf); + list_del(&xfer->list); + kfree(xfer); + } + + return 0; + +abort: + /* Put the chip back into reset */ + wm0010_halt(codec); + mutex_unlock(&wm0010->lock); + return ret; + +err_core: + mutex_unlock(&wm0010->lock); + regulator_bulk_disable(ARRAY_SIZE(wm0010->core_supplies), + wm0010->core_supplies); +err: + return ret; +} + +static int wm0010_set_bias_level(struct snd_soc_codec *codec, + enum snd_soc_bias_level level) +{ + struct wm0010_priv *wm0010 = snd_soc_codec_get_drvdata(codec); + + switch (level) { + case SND_SOC_BIAS_ON: + if (codec->dapm.bias_level == SND_SOC_BIAS_PREPARE) + wm0010_boot(codec); + break; + case SND_SOC_BIAS_PREPARE: + break; + case SND_SOC_BIAS_STANDBY: + if (codec->dapm.bias_level == SND_SOC_BIAS_PREPARE) { + mutex_lock(&wm0010->lock); + wm0010_halt(codec); + mutex_unlock(&wm0010->lock); + } + break; + case SND_SOC_BIAS_OFF: + break; + } + + codec->dapm.bias_level = level; + + return 0; +} + +static int wm0010_set_sysclk(struct snd_soc_codec *codec, int source, + int clk_id, unsigned int freq, int dir) +{ + struct wm0010_priv *wm0010 = snd_soc_codec_get_drvdata(codec); + unsigned int i; + + wm0010->sysclk = freq; + + if (freq < pll_clock_map[ARRAY_SIZE(pll_clock_map)-1].max_sysclk) { + wm0010->max_spi_freq = 0; + } else { + for (i = 0; i < ARRAY_SIZE(pll_clock_map); i++) + if (freq >= pll_clock_map[i].max_sysclk) + break; + + wm0010->max_spi_freq = pll_clock_map[i].max_pll_spi_speed; + wm0010->pll_clkctrl1 = pll_clock_map[i].pll_clkctrl1; + } + + return 0; +} + +static int wm0010_probe(struct snd_soc_codec *codec); + +static struct snd_soc_codec_driver soc_codec_dev_wm0010 = { + .probe = wm0010_probe, + .set_bias_level = wm0010_set_bias_level, + .set_sysclk = wm0010_set_sysclk, + .idle_bias_off = true, + + .dapm_widgets = wm0010_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(wm0010_dapm_widgets), + .dapm_routes = wm0010_dapm_routes, + .num_dapm_routes = ARRAY_SIZE(wm0010_dapm_routes), +}; + +#define WM0010_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000) +#define WM0010_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE |\ + SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE |\ + SNDRV_PCM_FMTBIT_S32_LE) + +static struct snd_soc_dai_driver wm0010_dai[] = { + { + .name = "wm0010-sdi1", + .playback = { + .stream_name = "SDI1 Playback", + .channels_min = 1, + .channels_max = 2, + .rates = WM0010_RATES, + .formats = WM0010_FORMATS, + }, + .capture = { + .stream_name = "SDI1 Capture", + .channels_min = 1, + .channels_max = 2, + .rates = WM0010_RATES, + .formats = WM0010_FORMATS, + }, + }, + { + .name = "wm0010-sdi2", + .playback = { + .stream_name = "SDI2 Playback", + .channels_min = 1, + .channels_max = 2, + .rates = WM0010_RATES, + .formats = WM0010_FORMATS, + }, + .capture = { + .stream_name = "SDI2 Capture", + .channels_min = 1, + .channels_max = 2, + .rates = WM0010_RATES, + .formats = WM0010_FORMATS, + }, + }, +}; + +static irqreturn_t wm0010_irq(int irq, void *data) +{ + struct wm0010_priv *wm0010 = data; + + switch (wm0010->state) { + case WM0010_POWER_OFF: + case WM0010_OUT_OF_RESET: + case WM0010_BOOTROM: + case WM0010_STAGE2: + spin_lock(&wm0010->irq_lock); + complete(&wm0010->boot_completion); + spin_unlock(&wm0010->irq_lock); + return IRQ_HANDLED; + default: + return IRQ_NONE; + } + + return IRQ_NONE; +} + +static int wm0010_probe(struct snd_soc_codec *codec) +{ + struct wm0010_priv *wm0010 = snd_soc_codec_get_drvdata(codec); + + wm0010->codec = codec; + + return 0; +} + +static int __devinit wm0010_spi_probe(struct spi_device *spi) +{ + unsigned long gpio_flags; + int ret; + int trigger; + int irq; + struct wm0010_priv *wm0010; + + wm0010 = devm_kzalloc(&spi->dev, sizeof(*wm0010), + GFP_KERNEL); + if (!wm0010) + return -ENOMEM; + + mutex_init(&wm0010->lock); + spin_lock_init(&wm0010->irq_lock); + + spi_set_drvdata(spi, wm0010); + wm0010->dev = &spi->dev; + + if (dev_get_platdata(&spi->dev)) + memcpy(&wm0010->pdata, dev_get_platdata(&spi->dev), + sizeof(wm0010->pdata)); + + init_completion(&wm0010->boot_completion); + + wm0010->core_supplies[0].supply = "AVDD"; + wm0010->core_supplies[1].supply = "DCVDD"; + ret = devm_regulator_bulk_get(wm0010->dev, ARRAY_SIZE(wm0010->core_supplies), + wm0010->core_supplies); + if (ret != 0) { + dev_err(wm0010->dev, "Failed to obtain core supplies: %d\n", + ret); + return ret; + } + + wm0010->dbvdd = devm_regulator_get(wm0010->dev, "DBVDD"); + if (IS_ERR(wm0010->dbvdd)) { + ret = PTR_ERR(wm0010->dbvdd); + dev_err(wm0010->dev, "Failed to obtain DBVDD: %d\n", ret); + return ret; + } + + if (wm0010->pdata.gpio_reset) { + wm0010->gpio_reset = wm0010->pdata.gpio_reset; + + if (wm0010->pdata.reset_active_high) + wm0010->gpio_reset_value = 1; + else + wm0010->gpio_reset_value = 0; + + if (wm0010->gpio_reset_value) + gpio_flags = GPIOF_OUT_INIT_HIGH; + else + gpio_flags = GPIOF_OUT_INIT_LOW; + + ret = devm_gpio_request_one(wm0010->dev, wm0010->gpio_reset, + gpio_flags, "wm0010 reset"); + if (ret < 0) { + dev_err(wm0010->dev, + "Failed to request GPIO for DSP reset: %d\n", + ret); + return ret; + } + } else { + dev_err(wm0010->dev, "No reset GPIO configured\n"); + return -EINVAL; + } + + wm0010->state = WM0010_POWER_OFF; + + irq = spi->irq; + if (wm0010->pdata.irq_flags) + trigger = wm0010->pdata.irq_flags; + else + trigger = IRQF_TRIGGER_FALLING; + trigger |= IRQF_ONESHOT; + + ret = request_threaded_irq(irq, NULL, wm0010_irq, trigger | IRQF_ONESHOT, + "wm0010", wm0010); + if (ret) { + dev_err(wm0010->dev, "Failed to request IRQ %d: %d\n", + irq, ret); + return ret; + } + wm0010->irq = irq; + + if (spi->max_speed_hz) + wm0010->board_max_spi_speed = spi->max_speed_hz; + else + wm0010->board_max_spi_speed = 0; + + ret = snd_soc_register_codec(&spi->dev, + &soc_codec_dev_wm0010, wm0010_dai, + ARRAY_SIZE(wm0010_dai)); + if (ret < 0) + return ret; + + return 0; +} + +static int __devexit wm0010_spi_remove(struct spi_device *spi) +{ + struct wm0010_priv *wm0010 = spi_get_drvdata(spi); + + snd_soc_unregister_codec(&spi->dev); + + gpio_set_value_cansleep(wm0010->gpio_reset, + wm0010->gpio_reset_value); + + if (wm0010->irq) + free_irq(wm0010->irq, wm0010); + + return 0; +} + +static struct spi_driver wm0010_spi_driver = { + .driver = { + .name = "wm0010", + .bus = &spi_bus_type, + .owner = THIS_MODULE, + }, + .probe = wm0010_spi_probe, + .remove = __devexit_p(wm0010_spi_remove), +}; + +module_spi_driver(wm0010_spi_driver); + +MODULE_DESCRIPTION("ASoC WM0010 driver"); +MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); +MODULE_LICENSE("GPL"); |
