/* * wm2000.c -- WM2000 ALSA Soc Audio driver * * Copyright 2008-2010 Wolfson Microelectronics PLC. * * Author: Mark Brown * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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) { struct snd_soc_dapm_context *dapm = &codec->dapm; int ret; if (!wm2000_i2c) { pr_err("WM2000 not yet probed\n"); return -ENODEV; } ret = snd_soc_dapm_new_controls(dapm, wm2000_dapm_widgets, ARRAY_SIZE(wm2000_dapm_widgets)); if (ret < 0) return ret; ret = snd_soc_dapm_add_routes(dapm, 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->anc_active = 1; wm2000->spk_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 device *dev) { struct i2c_client *i2c = to_i2c_client(dev); struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev); return wm2000_anc_transition(wm2000, ANC_OFF); } static int wm2000_i2c_resume(struct device *dev) { struct i2c_client *i2c = to_i2c_client(dev); struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev); return wm2000_anc_set_mode(wm2000); } #endif static SIMPLE_DEV_PM_OPS(wm2000_pm, wm2000_i2c_suspend, wm2000_i2c_resume); 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, .pm = &wm2000_pm, }, .probe = wm2000_i2c_probe, .remove = __devexit_p(wm2000_i2c_remove), .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 "); MODULE_LICENSE("GPL");