| /* |
| * 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/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 <linux/slab.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) |
| { |
| 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 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"); |