diff options
Diffstat (limited to 'sound/soc/codecs/wm2000.c')
| -rw-r--r-- | sound/soc/codecs/wm2000.c | 888 |
1 files changed, 888 insertions, 0 deletions
diff --git a/sound/soc/codecs/wm2000.c b/sound/soc/codecs/wm2000.c new file mode 100644 index 00000000000..217b0268059 --- /dev/null +++ b/sound/soc/codecs/wm2000.c @@ -0,0 +1,888 @@ +/* + * wm2000.c -- WM2000 ALSA Soc Audio driver + * + * Copyright 2008-2010 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. + * + * The download image for the WM2000 will be requested as + * 'wm2000_anc.bin' by default (overridable via platform data) at + * runtime and is expected to be in flat binary format. This is + * generated by Wolfson configuration tools and includes + * system-specific callibration information. If supplied as a + * sequence of ASCII-encoded hexidecimal bytes this can be converted + * into a flat binary with a command such as this on the command line: + * + * perl -e 'while (<>) { s/[\r\n]+// ; printf("%c", hex($_)); }' + * < file > wm2000_anc.bin + */ + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/version.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/firmware.h> +#include <linux/delay.h> +#include <linux/pm.h> +#include <linux/i2c.h> +#include <linux/platform_device.h> +#include <linux/debugfs.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include <sound/soc-dapm.h> +#include <sound/initval.h> +#include <sound/tlv.h> + +#include <sound/wm2000.h> + +#include "wm2000.h" + +enum wm2000_anc_mode { + ANC_ACTIVE = 0, + ANC_BYPASS = 1, + ANC_STANDBY = 2, + ANC_OFF = 3, +}; + +struct wm2000_priv { + struct i2c_client *i2c; + + enum wm2000_anc_mode anc_mode; + + unsigned int anc_active:1; + unsigned int anc_eng_ena:1; + unsigned int spk_ena:1; + + unsigned int mclk_div:1; + unsigned int speech_clarity:1; + + int anc_download_size; + char *anc_download; +}; + +static struct i2c_client *wm2000_i2c; + +static int wm2000_write(struct i2c_client *i2c, unsigned int reg, + unsigned int value) +{ + u8 data[3]; + int ret; + + data[0] = (reg >> 8) & 0xff; + data[1] = reg & 0xff; + data[2] = value & 0xff; + + dev_vdbg(&i2c->dev, "write %x = %x\n", reg, value); + + ret = i2c_master_send(i2c, data, 3); + if (ret == 3) + return 0; + if (ret < 0) + return ret; + else + return -EIO; +} + +static unsigned int wm2000_read(struct i2c_client *i2c, unsigned int r) +{ + struct i2c_msg xfer[2]; + u8 reg[2]; + u8 data; + int ret; + + /* Write register */ + reg[0] = (r >> 8) & 0xff; + reg[1] = r & 0xff; + xfer[0].addr = i2c->addr; + xfer[0].flags = 0; + xfer[0].len = sizeof(reg); + xfer[0].buf = ®[0]; + + /* Read data */ + xfer[1].addr = i2c->addr; + xfer[1].flags = I2C_M_RD; + xfer[1].len = 1; + xfer[1].buf = &data; + + ret = i2c_transfer(i2c->adapter, xfer, 2); + if (ret != 2) { + dev_err(&i2c->dev, "i2c_transfer() returned %d\n", ret); + return 0; + } + + dev_vdbg(&i2c->dev, "read %x from %x\n", data, r); + + return data; +} + +static void wm2000_reset(struct wm2000_priv *wm2000) +{ + struct i2c_client *i2c = wm2000->i2c; + + wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR); + wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR); + wm2000_write(i2c, WM2000_REG_ID1, 0); + + wm2000->anc_mode = ANC_OFF; +} + +static int wm2000_poll_bit(struct i2c_client *i2c, + unsigned int reg, u8 mask, int timeout) +{ + int val; + + val = wm2000_read(i2c, reg); + + while (!(val & mask) && --timeout) { + msleep(1); + val = wm2000_read(i2c, reg); + } + + if (timeout == 0) + return 0; + else + return 1; +} + +static int wm2000_power_up(struct i2c_client *i2c, int analogue) +{ + struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev); + int ret, timeout; + + BUG_ON(wm2000->anc_mode != ANC_OFF); + + dev_dbg(&i2c->dev, "Beginning power up\n"); + + if (!wm2000->mclk_div) { + dev_dbg(&i2c->dev, "Disabling MCLK divider\n"); + wm2000_write(i2c, WM2000_REG_SYS_CTL2, + WM2000_MCLK_DIV2_ENA_CLR); + } else { + dev_dbg(&i2c->dev, "Enabling MCLK divider\n"); + wm2000_write(i2c, WM2000_REG_SYS_CTL2, + WM2000_MCLK_DIV2_ENA_SET); + } + + wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR); + wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_SET); + + /* Wait for ANC engine to become ready */ + if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT, + WM2000_ANC_ENG_IDLE, 1)) { + dev_err(&i2c->dev, "ANC engine failed to reset\n"); + return -ETIMEDOUT; + } + + if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS, + WM2000_STATUS_BOOT_COMPLETE, 1)) { + dev_err(&i2c->dev, "ANC engine failed to initialise\n"); + return -ETIMEDOUT; + } + + wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET); + + /* Open code download of the data since it is the only bulk + * write we do. */ + dev_dbg(&i2c->dev, "Downloading %d bytes\n", + wm2000->anc_download_size - 2); + + ret = i2c_master_send(i2c, wm2000->anc_download, + wm2000->anc_download_size); + if (ret < 0) { + dev_err(&i2c->dev, "i2c_transfer() failed: %d\n", ret); + return ret; + } + if (ret != wm2000->anc_download_size) { + dev_err(&i2c->dev, "i2c_transfer() failed, %d != %d\n", + ret, wm2000->anc_download_size); + return -EIO; + } + + dev_dbg(&i2c->dev, "Download complete\n"); + + if (analogue) { + timeout = 248; + wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, timeout / 4); + + wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, + WM2000_MODE_ANA_SEQ_INCLUDE | + WM2000_MODE_MOUSE_ENABLE | + WM2000_MODE_THERMAL_ENABLE); + } else { + timeout = 10; + + wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, + WM2000_MODE_MOUSE_ENABLE | + WM2000_MODE_THERMAL_ENABLE); + } + + ret = wm2000_read(i2c, WM2000_REG_SPEECH_CLARITY); + if (wm2000->speech_clarity) + ret &= ~WM2000_SPEECH_CLARITY; + else + ret |= WM2000_SPEECH_CLARITY; + wm2000_write(i2c, WM2000_REG_SPEECH_CLARITY, ret); + + wm2000_write(i2c, WM2000_REG_SYS_START0, 0x33); + wm2000_write(i2c, WM2000_REG_SYS_START1, 0x02); + + wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR); + + if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS, + WM2000_STATUS_MOUSE_ACTIVE, timeout)) { + dev_err(&i2c->dev, "Timed out waiting for device after %dms\n", + timeout * 10); + return -ETIMEDOUT; + } + + dev_dbg(&i2c->dev, "ANC active\n"); + if (analogue) + dev_dbg(&i2c->dev, "Analogue active\n"); + wm2000->anc_mode = ANC_ACTIVE; + + return 0; +} + +static int wm2000_power_down(struct i2c_client *i2c, int analogue) +{ + struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev); + int timeout; + + if (analogue) { + timeout = 248; + wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, timeout / 4); + wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, + WM2000_MODE_ANA_SEQ_INCLUDE | + WM2000_MODE_POWER_DOWN); + } else { + timeout = 10; + wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, + WM2000_MODE_POWER_DOWN); + } + + if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS, + WM2000_STATUS_POWER_DOWN_COMPLETE, timeout)) { + dev_err(&i2c->dev, "Timeout waiting for ANC power down\n"); + return -ETIMEDOUT; + } + + if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT, + WM2000_ANC_ENG_IDLE, 1)) { + dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n"); + return -ETIMEDOUT; + } + + dev_dbg(&i2c->dev, "powered off\n"); + wm2000->anc_mode = ANC_OFF; + + return 0; +} + +static int wm2000_enter_bypass(struct i2c_client *i2c, int analogue) +{ + struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev); + + BUG_ON(wm2000->anc_mode != ANC_ACTIVE); + + if (analogue) { + wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, + WM2000_MODE_ANA_SEQ_INCLUDE | + WM2000_MODE_THERMAL_ENABLE | + WM2000_MODE_BYPASS_ENTRY); + } else { + wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, + WM2000_MODE_THERMAL_ENABLE | + WM2000_MODE_BYPASS_ENTRY); + } + + if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS, + WM2000_STATUS_ANC_DISABLED, 10)) { + dev_err(&i2c->dev, "Timeout waiting for ANC disable\n"); + return -ETIMEDOUT; + } + + if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT, + WM2000_ANC_ENG_IDLE, 1)) { + dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n"); + return -ETIMEDOUT; + } + + wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY); + wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR); + + wm2000->anc_mode = ANC_BYPASS; + dev_dbg(&i2c->dev, "bypass enabled\n"); + + return 0; +} + +static int wm2000_exit_bypass(struct i2c_client *i2c, int analogue) +{ + struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev); + + BUG_ON(wm2000->anc_mode != ANC_BYPASS); + + wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0); + + if (analogue) { + wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, + WM2000_MODE_ANA_SEQ_INCLUDE | + WM2000_MODE_MOUSE_ENABLE | + WM2000_MODE_THERMAL_ENABLE); + } else { + wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, + WM2000_MODE_MOUSE_ENABLE | + WM2000_MODE_THERMAL_ENABLE); + } + + wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET); + wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR); + + if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS, + WM2000_STATUS_MOUSE_ACTIVE, 10)) { + dev_err(&i2c->dev, "Timed out waiting for MOUSE\n"); + return -ETIMEDOUT; + } + + wm2000->anc_mode = ANC_ACTIVE; + dev_dbg(&i2c->dev, "MOUSE active\n"); + + return 0; +} + +static int wm2000_enter_standby(struct i2c_client *i2c, int analogue) +{ + struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev); + int timeout; + + BUG_ON(wm2000->anc_mode != ANC_ACTIVE); + + if (analogue) { + timeout = 248; + wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, timeout / 4); + + wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, + WM2000_MODE_ANA_SEQ_INCLUDE | + WM2000_MODE_THERMAL_ENABLE | + WM2000_MODE_STANDBY_ENTRY); + } else { + timeout = 10; + + wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, + WM2000_MODE_THERMAL_ENABLE | + WM2000_MODE_STANDBY_ENTRY); + } + + if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS, + WM2000_STATUS_ANC_DISABLED, timeout)) { + dev_err(&i2c->dev, + "Timed out waiting for ANC disable after 1ms\n"); + return -ETIMEDOUT; + } + + if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT, WM2000_ANC_ENG_IDLE, + 1)) { + dev_err(&i2c->dev, + "Timed out waiting for standby after %dms\n", + timeout * 10); + return -ETIMEDOUT; + } + + wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY); + wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR); + + wm2000->anc_mode = ANC_STANDBY; + dev_dbg(&i2c->dev, "standby\n"); + if (analogue) + dev_dbg(&i2c->dev, "Analogue disabled\n"); + + return 0; +} + +static int wm2000_exit_standby(struct i2c_client *i2c, int analogue) +{ + struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev); + int timeout; + + BUG_ON(wm2000->anc_mode != ANC_STANDBY); + + wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0); + + if (analogue) { + timeout = 248; + wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, timeout / 4); + + wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, + WM2000_MODE_ANA_SEQ_INCLUDE | + WM2000_MODE_THERMAL_ENABLE | + WM2000_MODE_MOUSE_ENABLE); + } else { + timeout = 10; + + wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, + WM2000_MODE_THERMAL_ENABLE | + WM2000_MODE_MOUSE_ENABLE); + } + + wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET); + wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR); + + if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS, + WM2000_STATUS_MOUSE_ACTIVE, timeout)) { + dev_err(&i2c->dev, "Timed out waiting for MOUSE after %dms\n", + timeout * 10); + return -ETIMEDOUT; + } + + wm2000->anc_mode = ANC_ACTIVE; + dev_dbg(&i2c->dev, "MOUSE active\n"); + if (analogue) + dev_dbg(&i2c->dev, "Analogue enabled\n"); + + return 0; +} + +typedef int (*wm2000_mode_fn)(struct i2c_client *i2c, int analogue); + +static struct { + enum wm2000_anc_mode source; + enum wm2000_anc_mode dest; + int analogue; + wm2000_mode_fn step[2]; +} anc_transitions[] = { + { + .source = ANC_OFF, + .dest = ANC_ACTIVE, + .analogue = 1, + .step = { + wm2000_power_up, + }, + }, + { + .source = ANC_OFF, + .dest = ANC_STANDBY, + .step = { + wm2000_power_up, + wm2000_enter_standby, + }, + }, + { + .source = ANC_OFF, + .dest = ANC_BYPASS, + .analogue = 1, + .step = { + wm2000_power_up, + wm2000_enter_bypass, + }, + }, + { + .source = ANC_ACTIVE, + .dest = ANC_BYPASS, + .analogue = 1, + .step = { + wm2000_enter_bypass, + }, + }, + { + .source = ANC_ACTIVE, + .dest = ANC_STANDBY, + .analogue = 1, + .step = { + wm2000_enter_standby, + }, + }, + { + .source = ANC_ACTIVE, + .dest = ANC_OFF, + .analogue = 1, + .step = { + wm2000_power_down, + }, + }, + { + .source = ANC_BYPASS, + .dest = ANC_ACTIVE, + .analogue = 1, + .step = { + wm2000_exit_bypass, + }, + }, + { + .source = ANC_BYPASS, + .dest = ANC_STANDBY, + .analogue = 1, + .step = { + wm2000_exit_bypass, + wm2000_enter_standby, + }, + }, + { + .source = ANC_BYPASS, + .dest = ANC_OFF, + .step = { + wm2000_exit_bypass, + wm2000_power_down, + }, + }, + { + .source = ANC_STANDBY, + .dest = ANC_ACTIVE, + .analogue = 1, + .step = { + wm2000_exit_standby, + }, + }, + { + .source = ANC_STANDBY, + .dest = ANC_BYPASS, + .analogue = 1, + .step = { + wm2000_exit_standby, + wm2000_enter_bypass, + }, + }, + { + .source = ANC_STANDBY, + .dest = ANC_OFF, + .step = { + wm2000_exit_standby, + wm2000_power_down, + }, + }, +}; + +static int wm2000_anc_transition(struct wm2000_priv *wm2000, + enum wm2000_anc_mode mode) +{ + struct i2c_client *i2c = wm2000->i2c; + int i, j; + int ret; + + if (wm2000->anc_mode == mode) + return 0; + + for (i = 0; i < ARRAY_SIZE(anc_transitions); i++) + if (anc_transitions[i].source == wm2000->anc_mode && + anc_transitions[i].dest == mode) + break; + if (i == ARRAY_SIZE(anc_transitions)) { + dev_err(&i2c->dev, "No transition for %d->%d\n", + wm2000->anc_mode, mode); + return -EINVAL; + } + + for (j = 0; j < ARRAY_SIZE(anc_transitions[j].step); j++) { + if (!anc_transitions[i].step[j]) + break; + ret = anc_transitions[i].step[j](i2c, + anc_transitions[i].analogue); + if (ret != 0) + return ret; + } + + return 0; +} + +static int wm2000_anc_set_mode(struct wm2000_priv *wm2000) +{ + struct i2c_client *i2c = wm2000->i2c; + enum wm2000_anc_mode mode; + + if (wm2000->anc_eng_ena && wm2000->spk_ena) + if (wm2000->anc_active) + mode = ANC_ACTIVE; + else + mode = ANC_BYPASS; + else + mode = ANC_STANDBY; + + dev_dbg(&i2c->dev, "Set mode %d (enabled %d, mute %d, active %d)\n", + mode, wm2000->anc_eng_ena, !wm2000->spk_ena, + wm2000->anc_active); + + return wm2000_anc_transition(wm2000, mode); +} + +static int wm2000_anc_mode_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev); + + ucontrol->value.enumerated.item[0] = wm2000->anc_active; + + return 0; +} + +static int wm2000_anc_mode_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev); + int anc_active = ucontrol->value.enumerated.item[0]; + + if (anc_active > 1) + return -EINVAL; + + wm2000->anc_active = anc_active; + + return wm2000_anc_set_mode(wm2000); +} + +static int wm2000_speaker_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev); + + ucontrol->value.enumerated.item[0] = wm2000->spk_ena; + + return 0; +} + +static int wm2000_speaker_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev); + int val = ucontrol->value.enumerated.item[0]; + + if (val > 1) + return -EINVAL; + + wm2000->spk_ena = val; + + return wm2000_anc_set_mode(wm2000); +} + +static const struct snd_kcontrol_new wm2000_controls[] = { + SOC_SINGLE_BOOL_EXT("WM2000 ANC Switch", 0, + wm2000_anc_mode_get, + wm2000_anc_mode_put), + SOC_SINGLE_BOOL_EXT("WM2000 Switch", 0, + wm2000_speaker_get, + wm2000_speaker_put), +}; + +static int wm2000_anc_power_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *kcontrol, int event) +{ + struct wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev); + + if (SND_SOC_DAPM_EVENT_ON(event)) + wm2000->anc_eng_ena = 1; + + if (SND_SOC_DAPM_EVENT_OFF(event)) + wm2000->anc_eng_ena = 0; + + return wm2000_anc_set_mode(wm2000); +} + +static const struct snd_soc_dapm_widget wm2000_dapm_widgets[] = { +/* Externally visible pins */ +SND_SOC_DAPM_OUTPUT("WM2000 SPKN"), +SND_SOC_DAPM_OUTPUT("WM2000 SPKP"), + +SND_SOC_DAPM_INPUT("WM2000 LINN"), +SND_SOC_DAPM_INPUT("WM2000 LINP"), + +SND_SOC_DAPM_PGA_E("ANC Engine", SND_SOC_NOPM, 0, 0, NULL, 0, + wm2000_anc_power_event, + SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), +}; + +/* Target, Path, Source */ +static const struct snd_soc_dapm_route audio_map[] = { + { "WM2000 SPKN", NULL, "ANC Engine" }, + { "WM2000 SPKP", NULL, "ANC Engine" }, + { "ANC Engine", NULL, "WM2000 LINN" }, + { "ANC Engine", NULL, "WM2000 LINP" }, +}; + +/* Called from the machine driver */ +int wm2000_add_controls(struct snd_soc_codec *codec) +{ + int ret; + + if (!wm2000_i2c) { + pr_err("WM2000 not yet probed\n"); + return -ENODEV; + } + + ret = snd_soc_dapm_new_controls(codec, wm2000_dapm_widgets, + ARRAY_SIZE(wm2000_dapm_widgets)); + if (ret < 0) + return ret; + + ret = snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map)); + if (ret < 0) + return ret; + + return snd_soc_add_controls(codec, wm2000_controls, + ARRAY_SIZE(wm2000_controls)); +} +EXPORT_SYMBOL_GPL(wm2000_add_controls); + +static int __devinit wm2000_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *i2c_id) +{ + struct wm2000_priv *wm2000; + struct wm2000_platform_data *pdata; + const char *filename; + const struct firmware *fw; + int reg, ret; + u16 id; + + if (wm2000_i2c) { + dev_err(&i2c->dev, "Another WM2000 is already registered\n"); + return -EINVAL; + } + + wm2000 = kzalloc(sizeof(struct wm2000_priv), GFP_KERNEL); + if (wm2000 == NULL) { + dev_err(&i2c->dev, "Unable to allocate private data\n"); + return -ENOMEM; + } + + /* Verify that this is a WM2000 */ + reg = wm2000_read(i2c, WM2000_REG_ID1); + id = reg << 8; + reg = wm2000_read(i2c, WM2000_REG_ID2); + id |= reg & 0xff; + + if (id != 0x2000) { + dev_err(&i2c->dev, "Device is not a WM2000 - ID %x\n", id); + ret = -ENODEV; + goto err; + } + + reg = wm2000_read(i2c, WM2000_REG_REVISON); + dev_info(&i2c->dev, "revision %c\n", reg + 'A'); + + filename = "wm2000_anc.bin"; + pdata = dev_get_platdata(&i2c->dev); + if (pdata) { + wm2000->mclk_div = pdata->mclkdiv2; + wm2000->speech_clarity = !pdata->speech_enh_disable; + + if (pdata->download_file) + filename = pdata->download_file; + } + + ret = request_firmware(&fw, filename, &i2c->dev); + if (ret != 0) { + dev_err(&i2c->dev, "Failed to acquire ANC data: %d\n", ret); + goto err; + } + + /* Pre-cook the concatenation of the register address onto the image */ + wm2000->anc_download_size = fw->size + 2; + wm2000->anc_download = kmalloc(wm2000->anc_download_size, GFP_KERNEL); + if (wm2000->anc_download == NULL) { + dev_err(&i2c->dev, "Out of memory\n"); + ret = -ENOMEM; + goto err_fw; + } + + wm2000->anc_download[0] = 0x80; + wm2000->anc_download[1] = 0x00; + memcpy(wm2000->anc_download + 2, fw->data, fw->size); + + release_firmware(fw); + + dev_set_drvdata(&i2c->dev, wm2000); + wm2000->anc_eng_ena = 1; + wm2000->i2c = i2c; + + wm2000_reset(wm2000); + + /* This will trigger a transition to standby mode by default */ + wm2000_anc_set_mode(wm2000); + + wm2000_i2c = i2c; + + return 0; + +err_fw: + release_firmware(fw); +err: + kfree(wm2000); + return ret; +} + +static __devexit int wm2000_i2c_remove(struct i2c_client *i2c) +{ + struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev); + + wm2000_anc_transition(wm2000, ANC_OFF); + + wm2000_i2c = NULL; + kfree(wm2000->anc_download); + kfree(wm2000); + + return 0; +} + +static void wm2000_i2c_shutdown(struct i2c_client *i2c) +{ + struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev); + + wm2000_anc_transition(wm2000, ANC_OFF); +} + +#ifdef CONFIG_PM +static int wm2000_i2c_suspend(struct i2c_client *i2c, pm_message_t mesg) +{ + struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev); + + return wm2000_anc_transition(wm2000, ANC_OFF); +} + +static int wm2000_i2c_resume(struct i2c_client *i2c) +{ + struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev); + + return wm2000_anc_set_mode(wm2000); +} +#else +#define wm2000_i2c_suspend NULL +#define wm2000_i2c_resume NULL +#endif + +static const struct i2c_device_id wm2000_i2c_id[] = { + { "wm2000", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, wm2000_i2c_id); + +static struct i2c_driver wm2000_i2c_driver = { + .driver = { + .name = "wm2000", + .owner = THIS_MODULE, + }, + .probe = wm2000_i2c_probe, + .remove = __devexit_p(wm2000_i2c_remove), + .suspend = wm2000_i2c_suspend, + .resume = wm2000_i2c_resume, + .shutdown = wm2000_i2c_shutdown, + .id_table = wm2000_i2c_id, +}; + +static int __init wm2000_init(void) +{ + return i2c_add_driver(&wm2000_i2c_driver); +} +module_init(wm2000_init); + +static void __exit wm2000_exit(void) +{ + i2c_del_driver(&wm2000_i2c_driver); +} +module_exit(wm2000_exit); + +MODULE_DESCRIPTION("ASoC WM2000 driver"); +MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfonmicro.com>"); +MODULE_LICENSE("GPL"); |