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List: linux-omap
Subject: [PATCH 28/33] add tsc2301 driver
From: Felipe Balbi <me () felipebalbi ! com>
Date: 2008-08-30 17:16:28
Message-ID: 1220116593-862-29-git-send-email-me () felipebalbi ! com
[Download RAW message or body]
From: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
---
drivers/spi/Kconfig | 22 +
drivers/spi/Makefile | 3 +
drivers/spi/tsc2301-core.c | 301 +++++++++++++
drivers/spi/tsc2301-mixer.c | 1004 +++++++++++++++++++++++++++++++++++++++++++
4 files changed, 1330 insertions(+), 0 deletions(-)
create mode 100644 drivers/spi/tsc2301-core.c
create mode 100644 drivers/spi/tsc2301-mixer.c
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 2a200ff..c891c1e 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -244,6 +244,28 @@ config SPI_TSC210X
automatically enable touchscreen, sensors or audio
functionality - enable these in their respective menus.
+config SPI_TSC2301
+ tristate "TSC2301 driver"
+ depends on SPI_MASTER
+ help
+ Say Y here if you have a TSC2301 chip connected to an SPI
+ bus on your board.
+
+ The TSC2301 is a highly integrated PDA analog interface circuit.
+ It contains a complete 12-bit A/D resistive touch screen
+ converter (ADC) including drivers, touch pressure measurement
+ capability, keypad controller, and 8-bit D/A converter (DAC) output
+ for LCD contrast control.
+
+ To compile this driver as a module, choose M here: the
+ module will be called tsc2301.
+
+config SPI_TSC2301_AUDIO
+ boolean "TSC2301 audio support"
+ depends on SPI_TSC2301 && SND
+ help
+ Say Y here for if you are using the audio features of TSC2301.
+
config SPI_SPIDEV
tristate "User mode SPI device driver support"
depends on EXPERIMENTAL
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index bf12723..f3841c8 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -36,6 +36,9 @@ obj-$(CONFIG_SPI_AT25) += at25.o
obj-$(CONFIG_SPI_SPIDEV) += spidev.o
obj-$(CONFIG_SPI_TLE62X0) += tle62x0.o
obj-$(CONFIG_SPI_TSC210X) += tsc210x.o
+obj-$(CONFIG_SPI_TSC2301) += tsc2301.o
+tsc2301-objs := tsc2301-core.o
+tsc2301-$(CONFIG_SPI_TSC2301_AUDIO) += tsc2301-mixer.o
# ... add above this line ...
# SPI slave controller drivers (upstream link)
diff --git a/drivers/spi/tsc2301-core.c b/drivers/spi/tsc2301-core.c
new file mode 100644
index 0000000..939bc48
--- /dev/null
+++ b/drivers/spi/tsc2301-core.c
@@ -0,0 +1,301 @@
+/*
+ * TSC2301 driver
+ *
+ * Copyright (C) 2005, 2006 Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/tsc2301.h>
+
+#ifdef CONFIG_ARCH_OMAP
+#include <mach/gpio.h>
+#endif
+
+u16 tsc2301_read_reg(struct tsc2301 *tsc, int reg)
+{
+ struct spi_transfer t[2];
+ struct spi_message m;
+ u16 data = 0, cmd;
+
+ cmd = reg;
+ cmd |= 0x8000;
+
+ memset(t, 0, sizeof(t));
+ spi_message_init(&m);
+ m.spi = tsc->spi;
+
+ t[0].tx_buf = &cmd;
+ t[0].rx_buf = NULL;
+ t[0].len = 2;
+ spi_message_add_tail(&t[0], &m);
+
+ t[1].tx_buf = NULL;
+ t[1].rx_buf = &data;
+ t[1].len = 2;
+ spi_message_add_tail(&t[1], &m);
+
+ spi_sync(m.spi, &m);
+
+ return data;
+}
+
+void tsc2301_write_reg(struct tsc2301 *tsc, int reg, u16 val)
+{
+ struct spi_transfer t;
+ struct spi_message m;
+ u16 data[2];
+
+ /* Now we prepare the command for transferring */
+ data[0] = reg;
+ data[1] = val;
+
+ spi_message_init(&m);
+ m.spi = tsc->spi;
+
+ memset(&t, 0, sizeof(t));
+ t.tx_buf = data;
+ t.rx_buf = NULL;
+ t.len = 4;
+ spi_message_add_tail(&t, &m);
+
+ spi_sync(m.spi, &m);
+}
+
+void tsc2301_write_kbc(struct tsc2301 *tsc, int val)
+{
+ u16 w;
+
+ w = tsc->config2_shadow;
+ w &= ~(0x03 << 14);
+ w |= (val & 0x03) << 14;
+ tsc2301_write_reg(tsc, TSC2301_REG_CONFIG2, w);
+ tsc->config2_shadow = w;
+}
+
+void tsc2301_write_pll(struct tsc2301 *tsc,
+ int pll_n, int pll_a, int pll_pdc, int pct_e, int pll_o)
+{
+ u16 w;
+
+ w = tsc->config2_shadow;
+ w &= ~0x3fff;
+ w |= (pll_n & 0x0f) | ((pll_a & 0x0f) << 4) | ((pll_pdc & 0x0f) << 8);
+ w |= pct_e ? (1 << 12) : 0;
+ w |= pll_o ? (1 << 13) : 0;
+ tsc2301_write_reg(tsc, TSC2301_REG_CONFIG2, w);
+ tsc->config2_shadow = w;
+}
+
+void tsc2301_read_buf(struct tsc2301 *tsc, int reg, u16 *rx_buf, int len)
+{
+ struct spi_transfer t[2];
+ struct spi_message m;
+ u16 cmd, i;
+
+ cmd = reg;
+ cmd |= 0x8000;
+
+ spi_message_init(&m);
+ m.spi = tsc->spi;
+
+ memset(t, 0, sizeof(t));
+ t[0].tx_buf = &cmd;
+ t[0].rx_buf = NULL;
+ t[0].len = 2;
+ spi_message_add_tail(&t[0], &m);
+
+ t[1].tx_buf = NULL;
+ t[1].rx_buf = rx_buf;
+ t[1].len = 2 * len;
+ spi_message_add_tail(&t[1], &m);
+
+ spi_sync(m.spi, &m);
+
+ for (i = 0; i < len; i++)
+ printk(KERN_DEBUG "rx_buf[%d]: %04x\n", i, rx_buf[i]);
+}
+
+static int __devinit tsc2301_probe(struct spi_device *spi)
+{
+ struct tsc2301 *tsc;
+ struct tsc2301_platform_data *pdata = spi->dev.platform_data;
+ int r;
+ u16 w;
+
+ if (!pdata) {
+ dev_dbg(&spi->dev, "no platform data?\n");
+ return -ENODEV;
+ }
+
+ tsc = kzalloc(sizeof(*tsc), GFP_KERNEL);
+ if (tsc == NULL)
+ return -ENOMEM;
+
+ dev_set_drvdata(&spi->dev, tsc);
+ tsc->spi = spi;
+
+ tsc->enable_clock = pdata->enable_clock;
+ tsc->disable_clock = pdata->disable_clock;
+
+ if (pdata->reset_gpio >= 0) {
+ tsc->reset_gpio = pdata->reset_gpio;
+#ifdef CONFIG_ARCH_OMAP
+ r = omap_request_gpio(tsc->reset_gpio);
+ if (r < 0)
+ goto err1;
+ omap_set_gpio_dataout(tsc->reset_gpio, 1);
+ omap_set_gpio_direction(tsc->reset_gpio, 0);
+ mdelay(1);
+ omap_set_gpio_dataout(tsc->reset_gpio, 0);
+#endif
+ } else
+ tsc->reset_gpio = -1;
+
+ spi->mode = SPI_MODE_1;
+ spi->bits_per_word = 16;
+ /* The max speed might've been defined by the board-specific
+ * struct */
+ if (!spi->max_speed_hz)
+ spi->max_speed_hz = TSC2301_HZ;
+ spi_setup(spi);
+
+ /* Soft reset */
+ tsc2301_write_reg(tsc, TSC2301_REG_RESET, 0xbb00);
+ msleep(1);
+
+ w = tsc2301_read_reg(tsc, TSC2301_REG_ADC);
+ if (!(w & (1 << 14))) {
+ dev_err(&spi->dev, "invalid ADC reg value: %04x\n", w);
+ r = -ENODEV;
+ goto err1;
+ }
+
+ w = tsc2301_read_reg(tsc, TSC2301_REG_DAC);
+ if (!(w & (1 << 15))) {
+ dev_err(&spi->dev, "invalid DAC reg value: %04x\n", w);
+ r = -ENODEV;
+ goto err1;
+ }
+
+ /* Stop keypad scanning */
+ tsc2301_write_reg(tsc, TSC2301_REG_KEY, 0x4000);
+
+ /* We have to cache this for read-modify-write, since we can't
+ * read back BIT15 */
+ w = tsc2301_read_reg(tsc, TSC2301_REG_CONFIG2);
+ /* By default BIT15 is set */
+ w |= 1 << 15;
+ tsc->config2_shadow = w;
+
+ r = tsc2301_kp_init(tsc, pdata);
+ if (r)
+ goto err1;
+ r = tsc2301_ts_init(tsc, pdata);
+ if (r)
+ goto err2;
+ r = tsc2301_mixer_init(tsc, pdata);
+ if (r)
+ goto err3;
+ return 0;
+
+err3:
+ tsc2301_ts_exit(tsc);
+err2:
+ tsc2301_kp_exit(tsc);
+err1:
+ kfree(tsc);
+ return r;
+}
+
+static int __devexit tsc2301_remove(struct spi_device *spi)
+{
+ struct tsc2301 *tsc = dev_get_drvdata(&spi->dev);
+
+ tsc2301_mixer_exit(tsc);
+ tsc2301_ts_exit(tsc);
+ tsc2301_kp_exit(tsc);
+ kfree(tsc);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int tsc2301_suspend(struct spi_device *spi, pm_message_t mesg)
+{
+ struct tsc2301 *tsc = dev_get_drvdata(&spi->dev);
+ int r;
+
+ if ((r = tsc2301_mixer_suspend(tsc)) < 0)
+ return r;
+ if ((r = tsc2301_kp_suspend(tsc)) < 0)
+ goto err1;
+ if ((r = tsc2301_ts_suspend(tsc)) < 0)
+ goto err2;
+
+ return 0;
+err2:
+ tsc2301_kp_resume(tsc);
+err1:
+ tsc2301_mixer_resume(tsc);
+ return r;
+}
+
+static int tsc2301_resume(struct spi_device *spi)
+{
+ struct tsc2301 *tsc = dev_get_drvdata(&spi->dev);
+
+ tsc2301_ts_resume(tsc);
+ tsc2301_kp_resume(tsc);
+ tsc2301_mixer_resume(tsc);
+ return 0;
+}
+#endif
+
+static struct spi_driver tsc2301_driver = {
+ .driver = {
+ .name = "tsc2301",
+ .bus = &spi_bus_type,
+ .owner = THIS_MODULE,
+ },
+#ifdef CONFIG_PM
+ .suspend = tsc2301_suspend,
+ .resume = tsc2301_resume,
+#endif
+ .probe = tsc2301_probe,
+ .remove = __devexit_p(tsc2301_remove),
+};
+
+static int __init tsc2301_init(void)
+{
+ printk("TSC2301 driver initializing\n");
+
+ return spi_register_driver(&tsc2301_driver);
+}
+module_init(tsc2301_init);
+
+static void __exit tsc2301_exit(void)
+{
+ spi_unregister_driver(&tsc2301_driver);
+}
+module_exit(tsc2301_exit);
+
+MODULE_AUTHOR("Juha Yrjölä <juha.yrjola@nokia.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/spi/tsc2301-mixer.c b/drivers/spi/tsc2301-mixer.c
new file mode 100644
index 0000000..31ec87c
--- /dev/null
+++ b/drivers/spi/tsc2301-mixer.c
@@ -0,0 +1,1004 @@
+/*
+ * ALSA Mixer implementation for TSC2301
+ *
+ * Copyright (C) 2006 Nokia Corporation.
+ *
+ * Contact: Jarkko Nikula <jarkko.nikula@nokia.com>
+ * Juha Yrjola
+ *
+ * Some notes about TSC2301:
+ * - PLL will stop when DAC and ADC's are powered down.
+ * - Touchscreen will stop working when audio part is powered up and if audio
+ * MCLK is stopped. Problem is avoided if audio is powered down before
+ * stopping MCLK.
+ * - Audio DAC or audio outputs will activate only after 100 msec from the
+ * chip power-up. Reason seems to be VCM since there is no this delay if the
+ * chip and VCM (bit AVPD on PD/MISC) were not powered down. The chip will
+ * consume about 1 mA if all other audio blocks are powered down except the
+ * chip itself and VCM. Full power down consumes only about few uA.
+ * - Power-down transition could happen earliest about 100 msec after the chip
+ * power-up. Otherwise power-down will fail if there is no that 100 msec
+ * on time before it. It's not obvious why is that since chip reports
+ * power-up to be completed and also PLL output on GPIO_0 is active in few
+ * milliseconds.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/tsc2301.h>
+
+#include <sound/driver.h>
+#include <sound/core.h>
+#include <sound/control.h>
+
+/* shadow register indexes */
+enum {
+ /* audio control and volume registers */
+ AUDCNTL_INDEX,
+ ADCVOL_INDEX,
+ DACVOL_INDEX,
+ BPVOL_INDEX,
+ /* keyclick control register (not needed here) */
+ /* audio power control register */
+ PD_MISC_INDEX,
+ /* TSC2301 GPIO control register */
+ GPIO_INDEX,
+
+ SHADOW_REG_COUNT,
+};
+
+/* structure for driver private data */
+struct tsc2301_mixer {
+ struct tsc2301 *tsc;
+ struct mutex mutex;
+
+ /* shadow registers holding TSC2301 audio registers. Used to hold
+ * their states during the sleep and also to reduce communication with
+ * the chip since get callback functions could get register values
+ * directly from these shadow registers without needing to read them
+ * from the chip */
+ u16 shadow_regs[SHADOW_REG_COUNT];
+
+ /* audio controller driver usage of the ADC and DAC */
+ unsigned adc_enabled:1, dac_enabled:1;
+ unsigned pll_output:1;
+ unsigned mclk_enabled;
+
+ /* latest audio power-up timestamp */
+ unsigned long pu_jiffies;
+
+ /* these are used when upper layer(s) are going to power-down TSC2301
+ * before 100 msec is passed from power-up */
+ struct delayed_work delayed_power_down;
+ unsigned delayed_pd_active:1;
+
+ int (* platform_init)(struct device *);
+ void (* platform_cleanup)(struct device *);
+
+ struct tsc2301_mixer_gpio *mixer_gpios;
+ int n_mixer_gpios;
+};
+
+#define TSC2301_DAC_DELAY msecs_to_jiffies(100)
+#define TSC2301_MIN_PU_PERIOD msecs_to_jiffies(100)
+
+#define TSC2301_REG_TO_PVAL(reg) \
+ (TSC2301_REG_TO_PAGE(reg) << 6 | TSC2301_REG_TO_ADDR(reg))
+#define TSC2301_PVAL_TO_REG(v) \
+ (TSC2301_REG((((v) >> 6) & 3),((v) & 0x1f)))
+
+#define TSC2301_VOLUME_MASK 0x7f
+#define TSC2301_MIN_ADCVOL 6
+#define TSC2301_MIN_DACVOL 0
+#define TSC2301_MIN_BPVOL 31
+#define TSC2301_MUTE_LEFT_SHIFT 15
+#define TSC2301_VOL_LEFT_SHIFT 8
+#define TSC2301_MUTE_RIGHT_SHIFT 7
+#define TSC2301_VOL_RIGHT_SHIFT 0
+
+#define TSC2301_INM_MASK 3
+#define TSC2301_INML_SHIFT 12
+#define TSC2301_INMR_SHIFT 10
+
+#define TSC2301_MICG_MASK 3
+#define TSC2301_MICG_MIN 1 /* values 0 & 1 both mean 0 dB */
+#define TSC2301_MICG_SHIFT 8
+
+#define TSC2301_REG_AUDCNTL_MCLK(v) (((v) & 3) << 6)
+#define TSC2301_REG_AUDCNTL_I2SFS(v) (((v) & 0xf) << 2)
+#define TSC2301_REG_AUDCNTL_I2SFM(v) (((v) & 3) << 0)
+
+#define TSC2301_SINGLE(xname, xindex, reg, shadow_index, shift, mask, min) \
+{\
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
+ .name = xname, \
+ .index = xindex, \
+ .info = snd_tsc2301_info_single, \
+ .get = snd_tsc2301_get_single, \
+ .put = snd_tsc2301_put_single, \
+ .private_value = TSC2301_REG_TO_PVAL(reg) | \
+ (shadow_index << 8) | (shift << 16) | (mask << 24) | \
+ (min << 28) \
+}
+#define TSC2301_SINGLE_MINVAL(v) (((v) >> 28) & 15)
+#define TSC2301_SINGLE_SHIFT(v) (((v) >> 16) & 15)
+#define TSC2301_SINGLE_MASK(v) (((v) >> 24) & 15)
+
+#define TSC2301_DOUBLE(xname, xindex, reg, shadow_index, ls, rs, mask, min) \
+{\
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
+ .name = xname, \
+ .index = xindex, \
+ .info = snd_tsc2301_info_double, \
+ .get = snd_tsc2301_get_double, \
+ .put = snd_tsc2301_put_double, \
+ .private_value = TSC2301_REG_TO_PVAL(reg) | \
+ (shadow_index << 8) | (min << 11) | \
+ (ls << 16) | (rs << 20) | (mask << 24) \
+}
+#define TSC2301_DOUBLE_MINVAL(v) (((v) >> 11) & 0x1f)
+#define TSC2301_DOUBLE_LEFT_SHIFT(v) (((v) >> 16) & 15)
+#define TSC2301_DOUBLE_RIGHT_SHIFT(v) (((v) >> 20) & 15)
+#define TSC2301_DOUBLE_MASK(v) (((v) >> 24) & TSC2301_VOLUME_MASK)
+
+#define TSC2301_MUX(xname, xindex, reg, shadow_index, ls, rs, mask) \
+{\
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
+ .name = xname, \
+ .index = xindex, \
+ .info = snd_tsc2301_info_mux, \
+ .get = snd_tsc2301_get_mux, \
+ .put = snd_tsc2301_put_mux, \
+ .private_value = TSC2301_REG_TO_PVAL(reg) | \
+ (shadow_index << 8) | (ls << 16) | (rs << 20) | (mask << 24) \
+}
+#define TSC2301_MUX_LEFT_SHIFT(v) (((v) >> 16) & 15)
+#define TSC2301_MUX_RIGHT_SHIFT(v) (((v) >> 20) & 15)
+#define TSC2301_MUX_MASK(v) (((v) >> 24) & TSC2301_VOLUME_MASK)
+
+#define TSC2301_BOOL(xname, xindex, reg, shadow_index, shift, invert, state) \
+{ \
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
+ .name = xname, \
+ .index = xindex, \
+ .info = snd_tsc2301_info_bool, \
+ .get = snd_tsc2301_get_bool, \
+ .put = snd_tsc2301_put_bool, \
+ .private_value = TSC2301_REG_TO_PVAL(reg) | \
+ (shadow_index << 8) | (shift << 16) | \
+ (invert << 24) | (state << 25) \
+}
+#define TSC2301_BOOL_SHIFT(v) (((v) >> 16) & 7)
+#define TSC2301_BOOL_INVERT(v) (((v) >> 24) & 1)
+#define TSC2301_BOOL_STATE(v) (((v) >> 25) & 1)
+
+#define TSC2301_SHADOW_INDEX(v) (((v) >> 8) & 7)
+
+/*
+ * Power-down handler for additional GPIO mixer controls. GPIO state of GPIO
+ * controls whose power-down flag is enabled are set to their false/deactivate
+ * state
+ *
+ * Must be called tsc->mixer->mutex locked
+ */
+static void tsc2301_gpio_power_down(struct tsc2301 *tsc)
+{
+ struct tsc2301_mixer *mix = tsc->mixer;
+ u16 temp;
+ int i;
+
+ temp = mix->shadow_regs[GPIO_INDEX];
+ for (i = 0; i < mix->n_mixer_gpios; i++) {
+ const struct tsc2301_mixer_gpio *mg;
+
+ mg = mix->mixer_gpios + i;
+ if (mg->deactivate_on_pd) {
+ int gpio = mg->gpio;
+
+ temp &= ~(1 << gpio);
+ temp |= mg->inverted << gpio;
+ }
+ }
+ tsc2301_write_reg(tsc, TSC2301_REG_GPIO, temp);
+}
+
+/*
+ * Powers down/up audio blocks which are muted or become unused.
+ * shadow_index >= 0, changes power state of single audio block
+ * shadow_index < 0, changes power state of all blocks
+ *
+ * Must be called tsc->mixer->mutex locked
+ */
+#define TSC2301_MUTE_MASK \
+ ((1 << TSC2301_MUTE_LEFT_SHIFT) | (1 << TSC2301_MUTE_RIGHT_SHIFT))
+static void tsc2301_power_ctrl(struct tsc2301 *tsc, int shadow_index,
+ int poll_pdsts)
+{
+ struct tsc2301_mixer *mix = tsc->mixer;
+ u16 pd_ctrl, pd_ctrl_old, w;
+ unsigned long timeout;
+ int power_up = 0;
+
+ if (mix->delayed_pd_active) {
+ mix->delayed_pd_active = 0;
+ mix->mclk_enabled--;
+ cancel_delayed_work(&mix->delayed_power_down);
+ }
+
+ pd_ctrl = pd_ctrl_old = mix->shadow_regs[PD_MISC_INDEX];
+ /* power control helper based on used space mixer selections. See
+ * actual power control decisions below */
+ if (shadow_index < 0 || shadow_index == ADCVOL_INDEX) {
+ /* ADC left and right power down control */
+ if (mix->shadow_regs[ADCVOL_INDEX] &
+ (1 << TSC2301_MUTE_LEFT_SHIFT))
+ /* left ADC muted. Power down the left ADC */
+ pd_ctrl |= TSC2301_REG_PD_MISC_ADPDL;
+ else
+ pd_ctrl &= ~TSC2301_REG_PD_MISC_ADPDL;
+ if (mix->shadow_regs[ADCVOL_INDEX] &
+ (1 << TSC2301_MUTE_LEFT_SHIFT))
+ /* right ADC muted. Power down the right ADC */
+ pd_ctrl |= TSC2301_REG_PD_MISC_ADPDR;
+ else
+ pd_ctrl &= ~TSC2301_REG_PD_MISC_ADPDR;
+ }
+ if (shadow_index < 0 || shadow_index == DACVOL_INDEX) {
+ /* DAC power down control */
+ if ((mix->shadow_regs[DACVOL_INDEX] &
+ TSC2301_MUTE_MASK) == TSC2301_MUTE_MASK)
+ /* both DACs muted. Power down the DAC */
+ pd_ctrl |= TSC2301_REG_PD_MISC_DAPD;
+ else
+ pd_ctrl &= ~TSC2301_REG_PD_MISC_DAPD;
+ }
+ if (shadow_index < 0 || shadow_index == BPVOL_INDEX) {
+ /* line bypass power down control */
+ if ((mix->shadow_regs[BPVOL_INDEX] &
+ TSC2301_MUTE_MASK) == TSC2301_MUTE_MASK)
+ /* both line bypasses muted. Power down the bypass
+ * path */
+ pd_ctrl |= TSC2301_REG_PD_MISC_ABPD;
+ else
+ pd_ctrl &= ~TSC2301_REG_PD_MISC_ABPD;
+ }
+ if (shadow_index < 0 || shadow_index == AUDCNTL_INDEX) {
+ /* mic bias power down control */
+ if ((mix->shadow_regs[AUDCNTL_INDEX] &
+ (3 << TSC2301_INML_SHIFT)) &&
+ (mix->shadow_regs[AUDCNTL_INDEX] &
+ (3 << TSC2301_INMR_SHIFT)))
+ /* both ADC channels use other than mic input. Power
+ * down the mic bias output */
+ pd_ctrl |= TSC2301_REG_PD_MISC_MIBPD;
+ else
+ pd_ctrl &= ~TSC2301_REG_PD_MISC_MIBPD;
+ }
+
+ /* power control decisions based on codec usage and user space mixer
+ * selections detected above */
+ pd_ctrl &= ~TSC2301_REG_PD_MISC_APD; /* audio not powered down */
+ if (mix->mclk_enabled) {
+ if (!mix->adc_enabled) {
+ /* ADC not used, power down both ADC's and mic bias
+ * output independently of user space mixer
+ * selections */
+ pd_ctrl |= TSC2301_REG_PD_MISC_ADPDL;
+ pd_ctrl |= TSC2301_REG_PD_MISC_ADPDR;
+ pd_ctrl |= TSC2301_REG_PD_MISC_MIBPD;
+ }
+ if (!mix->dac_enabled) {
+ /* DAC not used, power down DAC independently of user
+ * space mixer selections */
+ pd_ctrl |= TSC2301_REG_PD_MISC_DAPD;
+ }
+
+ if (mix->pll_output) {
+ /* GPIO_0 is configured as PLL output so audio
+ * controller is expecting clock from TSC2301. Either
+ * ADC or DAC must be active in order to keep PLL on */
+ if ((pd_ctrl & TSC2301_REG_PD_MISC_ADPDL) &&
+ (pd_ctrl & TSC2301_REG_PD_MISC_ADPDR) &&
+ (pd_ctrl & TSC2301_REG_PD_MISC_DAPD)) {
+ /* neither ADC or DAC used. Force ADC on in
+ * order to keep PLL active */
+ pd_ctrl &= ~(TSC2301_REG_PD_MISC_ADPDL |
+ TSC2301_REG_PD_MISC_ADPDR);
+ }
+ }
+ } else {
+ /* audio input clock is not enabled so power down DAC and ADC
+ * in order to shutdown PLL and to keep touchscreen and keypad
+ * parts working. Touchscreen and keypad use audio clock when
+ * PLL is on and internal clock otherwise */
+ pd_ctrl |= TSC2301_REG_PD_MISC_DAPD |
+ TSC2301_REG_PD_MISC_ADPDL |
+ TSC2301_REG_PD_MISC_ADPDR;
+ }
+
+ if ((pd_ctrl & TSC2301_REG_PD_MISC_ADPDL) &&
+ (pd_ctrl & TSC2301_REG_PD_MISC_ADPDR) &&
+ (pd_ctrl & TSC2301_REG_PD_MISC_DAPD) &&
+ (pd_ctrl & TSC2301_REG_PD_MISC_ABPD)) {
+ /* all ADC, DAC and line bypass path unused. Power down the
+ * whole audio part of the TSC2301 */
+ pd_ctrl |= TSC2301_REG_PD_MISC_APD;
+ }
+
+ if (pd_ctrl == pd_ctrl_old)
+ return;
+
+ /* power down control changed. Update into TSC2301 */
+ if ((pd_ctrl ^ pd_ctrl_old) & TSC2301_REG_PD_MISC_APD) {
+ /* whole audio power state changed. Update GPIO states */
+ if (pd_ctrl & TSC2301_REG_PD_MISC_APD) {
+ /* power down GPIO controls before powering down
+ * the codec */
+ tsc2301_gpio_power_down(tsc);
+ /* we must really ensure that codec has been on no less
+ * than 100 msec before doing power-down */
+ timeout = mix->pu_jiffies + TSC2301_MIN_PU_PERIOD -
+ jiffies;
+ if (timeout <= TSC2301_MIN_PU_PERIOD) {
+ mix->delayed_pd_active = 1;
+ mix->mclk_enabled++;
+ schedule_delayed_work(&mix->delayed_power_down,
+ timeout + 1);
+ return;
+ }
+ } else
+ /* restore GPIOs after codec is powered up */
+ power_up = 1;
+ }
+ mix->shadow_regs[PD_MISC_INDEX] = pd_ctrl;
+ tsc2301_write_reg(tsc, TSC2301_REG_PD_MISC, pd_ctrl);
+ if (power_up)
+ mix->pu_jiffies = jiffies;
+ if (!poll_pdsts) {
+ if (power_up)
+ tsc2301_write_reg(tsc, TSC2301_REG_GPIO,
+ mix->shadow_regs[GPIO_INDEX]);
+ return;
+ }
+
+ /* wait until power-up/-down is completed */
+ timeout = jiffies + msecs_to_jiffies(100);
+ w = 0;
+ do {
+ if (time_after(jiffies, timeout)) {
+ /* Print a warning only if the I2S clock is not
+ * present / out of sync. This can happen during
+ * init time, when that clock will be turned on
+ * by another driver like in the OMAP EAC with
+ * external clock case.
+ */
+ if (w & TSC2301_REG_PD_MISC_OTSYN) {
+ dev_warn(&tsc->spi->dev,
+ "I2S clock not in sync or off.\n");
+ } else {
+ dev_err(&tsc->spi->dev,
+ "power-up/-down timed out "
+ "(0x%04x, 0x%04x -> 0x%04x)\n",
+ w, pd_ctrl_old, pd_ctrl);
+ }
+ goto out;
+ }
+ w = tsc2301_read_reg(tsc, TSC2301_REG_PD_MISC);
+ } while (!(w & TSC2301_REG_PD_MISC_PDSTS));
+
+out:
+ if (((pd_ctrl ^ pd_ctrl_old) & TSC2301_REG_PD_MISC_DAPD) &&
+ !(pd_ctrl & TSC2301_REG_PD_MISC_DAPD)) {
+ /* DAC powered up now. Ensure that DAC and audio outputs are
+ * activated. They are up 100 msec after the chip power-up
+ * command */
+ timeout = mix->pu_jiffies + TSC2301_DAC_DELAY - jiffies;
+ if (timeout <= TSC2301_DAC_DELAY)
+ schedule_timeout_interruptible(timeout);
+ /* FIXME: This is lazy. We restore GPIOs only after activating
+ * the DAC. It would be better to do some kind of delayed GPIO
+ * restore. That ensures that we restore them also if only ADC
+ * path is activated. But this is required only if there is
+ * some input amplifier, bias control, etc. and their power
+ * state is under TSC GPIO control */
+ tsc2301_write_reg(tsc, TSC2301_REG_GPIO,
+ mix->shadow_regs[GPIO_INDEX]);
+ }
+}
+
+static int snd_tsc2301_info_single(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ int mask = TSC2301_SINGLE_MASK(kcontrol->private_value);
+ int minval = TSC2301_SINGLE_MINVAL(kcontrol->private_value);
+
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+ uinfo->count = 1;
+ uinfo->value.integer.min = minval;
+ uinfo->value.integer.max = mask;
+
+ return 0;
+}
+
+static int snd_tsc2301_get_single(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct tsc2301 *tsc = kcontrol->private_data;
+ unsigned long priv = kcontrol->private_value;
+ int mask = TSC2301_SINGLE_MASK(priv);
+ int shift = TSC2301_SINGLE_SHIFT(priv);
+ int shadow_index = TSC2301_SHADOW_INDEX(priv);
+ u16 shadow_reg;
+
+ shadow_reg = tsc->mixer->shadow_regs[shadow_index];
+
+ ucontrol->value.integer.value[0] = (shadow_reg >> shift) & mask;
+
+ return 0;
+}
+
+static int snd_tsc2301_put_single(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct tsc2301 *tsc = kcontrol->private_data;
+ unsigned long priv = kcontrol->private_value;
+ int mask = TSC2301_SINGLE_MASK(priv);
+ int shadow_index = TSC2301_SHADOW_INDEX(priv);
+ u16 shadow_reg, shadow_reg_old;
+ int shift = TSC2301_SINGLE_SHIFT(priv);
+ int reg = TSC2301_PVAL_TO_REG(priv);
+ int changed;
+
+ mutex_lock(&tsc->mixer->mutex);
+ shadow_reg = shadow_reg_old = tsc->mixer->shadow_regs[shadow_index];
+
+ /* zero bits to be modified */
+ shadow_reg &= ~(mask << shift);
+ /* modify with new value */
+ shadow_reg |= ((ucontrol->value.integer.value[0] & mask) << shift);
+
+ changed = (shadow_reg != shadow_reg_old);
+ tsc->mixer->shadow_regs[shadow_index] = shadow_reg;
+
+ /* update into TSC2301 if necessary */
+ if (changed)
+ tsc2301_write_reg(tsc, reg, shadow_reg);
+ mutex_unlock(&tsc->mixer->mutex);
+
+ return changed;
+}
+
+static int snd_tsc2301_info_double(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ /* mask == 1 : Switch
+ * mask > 1 : Max volume */
+ int mask = TSC2301_DOUBLE_MASK(kcontrol->private_value);
+ int minval = TSC2301_DOUBLE_MINVAL(kcontrol->private_value);
+
+ uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN :
+ SNDRV_CTL_ELEM_TYPE_INTEGER;
+ uinfo->count = 2;
+ uinfo->value.integer.min = minval;
+ uinfo->value.integer.max = mask;
+
+ return 0;
+}
+
+static int snd_tsc2301_get_double(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct tsc2301 *tsc = kcontrol->private_data;
+ unsigned long priv = kcontrol->private_value;
+ /* mask == 1 : Switch
+ * mask > 1 : Volume */
+ int mask = TSC2301_DOUBLE_MASK(priv);
+ int ls = TSC2301_DOUBLE_LEFT_SHIFT(priv);
+ int rs = TSC2301_DOUBLE_RIGHT_SHIFT(priv);
+ int shadow_index = TSC2301_SHADOW_INDEX(priv);
+ u16 shadow_reg;
+
+ shadow_reg = tsc->mixer->shadow_regs[shadow_index];
+
+ /* invert mute bits for the switches */
+ if (mask == 1)
+ shadow_reg = ~shadow_reg;
+
+ ucontrol->value.integer.value[0] = (shadow_reg >> ls) & mask;
+ ucontrol->value.integer.value[1] = (shadow_reg >> rs) & mask;
+
+ return 0;
+}
+
+static int snd_tsc2301_put_double(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct tsc2301 *tsc = kcontrol->private_data;
+ unsigned long priv = kcontrol->private_value;
+ /* mask == 1 : Switch
+ * mask > 1 : Volume */
+ int mask = TSC2301_DOUBLE_MASK(priv);
+ int shadow_index = TSC2301_SHADOW_INDEX(priv);
+ u16 shadow_reg, shadow_reg_old;
+ int ls = TSC2301_DOUBLE_LEFT_SHIFT(priv);
+ int rs = TSC2301_DOUBLE_RIGHT_SHIFT(priv);
+ int reg = TSC2301_PVAL_TO_REG(priv);
+ int changed;
+
+ mutex_lock(&tsc->mixer->mutex);
+ shadow_reg = shadow_reg_old = tsc->mixer->shadow_regs[shadow_index];
+
+ /* zero bits to be modified */
+ shadow_reg &= ~((mask << ls) | (mask << rs));
+ /* modify with new value */
+ if (mask == 1) {
+ /* switch. Invert switch values for the mute bits */
+ shadow_reg |=
+ ((~ucontrol->value.integer.value[0] & mask) << ls) |
+ ((~ucontrol->value.integer.value[1] & mask) << rs);
+ } else {
+ /* volume */
+ shadow_reg |=
+ (ucontrol->value.integer.value[0] << ls) |
+ (ucontrol->value.integer.value[1] << rs);
+ }
+
+ changed = (shadow_reg != shadow_reg_old);
+ tsc->mixer->shadow_regs[shadow_index] = shadow_reg;
+
+ /* update into TSC2301 if necessary */
+ if (changed)
+ tsc2301_write_reg(tsc, reg, shadow_reg);
+
+ if (mask == 1)
+ /* check is need to power down/up audio blocks in case of
+ * muted state change */
+ tsc2301_power_ctrl(tsc, shadow_index, 0);
+ mutex_unlock(&tsc->mixer->mutex);
+
+ return changed;
+}
+
+static int snd_tsc2301_info_mux(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ static char *texts[4] = {"Mic", "Line", "Line swapped", "Line mono"};
+
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
+ uinfo->count = 2;
+ uinfo->value.enumerated.items = 4;
+ if (uinfo->value.enumerated.item > 3)
+ uinfo->value.enumerated.item = 3;
+ strcpy(uinfo->value.enumerated.name,
+ texts[uinfo->value.enumerated.item]);
+
+ return 0;
+}
+
+static int snd_tsc2301_get_mux(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct tsc2301 *tsc = kcontrol->private_data;
+ unsigned long priv = kcontrol->private_value;
+ int mask = TSC2301_MUX_MASK(priv);
+ int ls = TSC2301_MUX_LEFT_SHIFT(priv);
+ int rs = TSC2301_MUX_RIGHT_SHIFT(priv);
+ int shadow_index = TSC2301_SHADOW_INDEX(priv);
+ u16 shadow_reg;
+
+ shadow_reg = tsc->mixer->shadow_regs[shadow_index];
+ ucontrol->value.enumerated.item[0] = (shadow_reg >> ls) & mask;
+ ucontrol->value.enumerated.item[1] = (shadow_reg >> rs) & mask;
+
+ return 0;
+}
+
+static int snd_tsc2301_put_mux(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct tsc2301 *tsc = kcontrol->private_data;
+ unsigned long priv = kcontrol->private_value;
+ int mask = TSC2301_MUX_MASK(priv);
+ int shadow_index = TSC2301_SHADOW_INDEX(priv);
+ u16 shadow_reg, shadow_reg_old;
+ int ls = TSC2301_MUX_LEFT_SHIFT(priv);
+ int rs = TSC2301_MUX_RIGHT_SHIFT(priv);
+ int reg = TSC2301_PVAL_TO_REG(priv);
+ int changed;
+
+ mutex_lock(&tsc->mixer->mutex);
+ shadow_reg = shadow_reg_old = tsc->mixer->shadow_regs[shadow_index];
+
+ /* zero bits to be modified */
+ shadow_reg &= ~((mask << ls) | (mask << rs));
+ /* modify with new value */
+ shadow_reg |= (ucontrol->value.enumerated.item[0] << ls);
+ shadow_reg |= (ucontrol->value.enumerated.item[1] << rs);
+
+ changed = (shadow_reg != shadow_reg_old);
+
+ /* update into TSC2301 if necessary */
+ if (changed) {
+ tsc->mixer->shadow_regs[shadow_index] = shadow_reg;
+ tsc2301_write_reg(tsc, reg, shadow_reg);
+ }
+
+ /* check is need to power up/down audio blocks in case of ADC input
+ * change */
+ tsc2301_power_ctrl(tsc, shadow_index, 0);
+ mutex_unlock(&tsc->mixer->mutex);
+
+ return changed;
+}
+
+static int snd_tsc2301_info_bool(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
+ uinfo->count = 1;
+ uinfo->value.integer.min = 0;
+ uinfo->value.integer.max = 1;
+
+ return 0;
+}
+
+static int snd_tsc2301_get_bool(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct tsc2301 *tsc = kcontrol->private_data;
+ unsigned long priv = kcontrol->private_value;
+ int shadow_index = TSC2301_SHADOW_INDEX(priv);
+ int shift = TSC2301_BOOL_SHIFT(priv);
+ int invert = TSC2301_BOOL_INVERT(priv);
+ u16 shadow_reg;
+
+ shadow_reg = tsc->mixer->shadow_regs[shadow_index];
+ ucontrol->value.integer.value[0] =
+ invert ^ ((shadow_reg >> shift) & 1);
+
+ return 0;
+}
+
+static int snd_tsc2301_put_bool(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct tsc2301 *tsc = kcontrol->private_data;
+ unsigned long priv = kcontrol->private_value;
+ int shadow_index = TSC2301_SHADOW_INDEX(priv);
+ int shift = TSC2301_BOOL_SHIFT(priv);
+ int invert = TSC2301_BOOL_INVERT(priv);
+ int reg = TSC2301_PVAL_TO_REG(priv);
+ u16 shadow_reg, shadow_reg_old;
+ int changed;
+
+ mutex_lock(&tsc->mixer->mutex);
+ shadow_reg = shadow_reg_old = tsc->mixer->shadow_regs[shadow_index];
+
+ /* zero bit to be modified */
+ shadow_reg &= ~(1 << shift);
+ /* modify with new value */
+ shadow_reg |=
+ (invert ^ (ucontrol->value.integer.value[0] & 1)) << shift;
+
+ changed = (shadow_reg != shadow_reg_old);
+
+ /* update into TSC2301 if necessary */
+ if (changed) {
+ tsc->mixer->shadow_regs[shadow_index] = shadow_reg;
+ if ((shadow_index == GPIO_INDEX) &&
+ (tsc->mixer->shadow_regs[PD_MISC_INDEX] &
+ TSC2301_REG_PD_MISC_APD)) {
+ /* changing GPIO control and audio is powered down.
+ * Update GPIO states according to their power-down
+ * flag */
+ tsc2301_gpio_power_down(tsc);
+ } else
+ tsc2301_write_reg(tsc, reg, shadow_reg);
+ }
+ mutex_unlock(&tsc->mixer->mutex);
+
+ return changed;
+}
+
+/* TSC2301 internal mixer controls */
+static struct snd_kcontrol_new snd_tsc2301_controls[] = {
+ /* stereo ADC input switches and volumes */
+ TSC2301_DOUBLE("Capture Switch", 0,
+ TSC2301_REG_ADCVOL, ADCVOL_INDEX,
+ TSC2301_MUTE_LEFT_SHIFT, TSC2301_MUTE_RIGHT_SHIFT,
+ 1, 0),
+ TSC2301_DOUBLE("Capture Volume", 0,
+ TSC2301_REG_ADCVOL, ADCVOL_INDEX,
+ TSC2301_VOL_LEFT_SHIFT, TSC2301_VOL_RIGHT_SHIFT,
+ TSC2301_VOLUME_MASK, TSC2301_MIN_ADCVOL),
+
+ /* stereo DAC output switches and volumes */
+ TSC2301_DOUBLE("PCM Playback Switch", 0,
+ TSC2301_REG_DACVOL, DACVOL_INDEX,
+ TSC2301_MUTE_LEFT_SHIFT, TSC2301_MUTE_RIGHT_SHIFT,
+ 1, 0),
+ TSC2301_DOUBLE("PCM Playback Volume", 0,
+ TSC2301_REG_DACVOL, DACVOL_INDEX,
+ TSC2301_VOL_LEFT_SHIFT, TSC2301_VOL_RIGHT_SHIFT,
+ TSC2301_VOLUME_MASK, TSC2301_MIN_DACVOL),
+
+ /* stereo line input bypass switches and volumes */
+ TSC2301_DOUBLE("Line Playback Switch", 0,
+ TSC2301_REG_BPVOL, BPVOL_INDEX,
+ TSC2301_MUTE_LEFT_SHIFT, TSC2301_MUTE_RIGHT_SHIFT,
+ 1, 0),
+ TSC2301_DOUBLE("Line Playback Volume", 0,
+ TSC2301_REG_BPVOL, BPVOL_INDEX,
+ TSC2301_VOL_LEFT_SHIFT, TSC2301_VOL_RIGHT_SHIFT,
+ TSC2301_VOLUME_MASK, TSC2301_MIN_BPVOL),
+
+ /* mono microphone input gain */
+ TSC2301_SINGLE("Mic Boost", 0,
+ TSC2301_REG_AUDCNTL, AUDCNTL_INDEX,
+ TSC2301_MICG_SHIFT,
+ TSC2301_MICG_MASK, TSC2301_MICG_MIN),
+
+ /* ADC input sources. Both channels could be selected separately */
+ TSC2301_MUX("Capture Source", 0,
+ TSC2301_REG_AUDCNTL, AUDCNTL_INDEX,
+ TSC2301_INML_SHIFT, TSC2301_INMR_SHIFT,
+ TSC2301_INM_MASK),
+};
+
+/* must be called tsc->mixer->mutex locked */
+static void tsc2301_flush_shadow_regs(struct tsc2301 *tsc)
+{
+ int i, page, addr;
+ u16 temp;
+
+ page = TSC2301_REG_TO_PAGE(TSC2301_REG_AUDCNTL);
+ addr = TSC2301_REG_TO_ADDR(TSC2301_REG_AUDCNTL);
+
+ for (i = 0; i < 4; i++) {
+ temp = tsc->mixer->shadow_regs[i];
+ tsc2301_write_reg(tsc, TSC2301_REG(page, addr + i), temp);
+ }
+ temp = tsc->mixer->shadow_regs[GPIO_INDEX];
+ tsc2301_write_reg(tsc, TSC2301_REG_GPIO, temp);
+
+ /* Update power state of all audio blocks depending are they
+ * muted or unused. */
+ tsc2301_power_ctrl(tsc, -1, 0);
+}
+
+#ifdef CONFIG_PM
+int tsc2301_mixer_suspend(struct tsc2301 *tsc)
+{
+ /* power down entire audio section inside TSC2301 in case the
+ * chip is still powered during the system sleep. However this driver
+ * doesn't require that chip is powered because registers are restored
+ * in function tsc2301_mixer_resume */
+ mutex_lock(&tsc->mixer->mutex);
+ tsc2301_gpio_power_down(tsc);
+ tsc->mixer->shadow_regs[PD_MISC_INDEX] |= TSC2301_REG_PD_MISC_APD;
+ tsc2301_write_reg(tsc, TSC2301_REG_PD_MISC,
+ tsc->mixer->shadow_regs[PD_MISC_INDEX]);
+ mutex_unlock(&tsc->mixer->mutex);
+ return 0;
+}
+
+void tsc2301_mixer_resume(struct tsc2301 *tsc)
+{
+ /* power up the TSC2301 audio section and restore registers */
+ mutex_lock(&tsc->mixer->mutex);
+ tsc->mixer->shadow_regs[PD_MISC_INDEX] &= ~TSC2301_REG_PD_MISC_APD;
+ tsc2301_flush_shadow_regs(tsc);
+ mutex_unlock(&tsc->mixer->mutex);
+}
+#endif
+
+void tsc2301_mixer_enable_mclk(struct device *dev)
+{
+ struct tsc2301 *tsc = dev_get_drvdata(dev);
+ struct tsc2301_mixer *mix = tsc->mixer;
+
+ mutex_lock(&mix->mutex);
+ if (!mix->mclk_enabled++ && tsc->enable_clock != NULL) {
+ tsc->enable_clock(dev);
+ }
+ tsc2301_power_ctrl(tsc, -1, 1);
+ mutex_unlock(&mix->mutex);
+}
+
+void tsc2301_mixer_disable_mclk(struct device *dev)
+{
+ struct tsc2301 *tsc = dev_get_drvdata(dev);
+ struct tsc2301_mixer *mix = tsc->mixer;
+
+ mutex_lock(&mix->mutex);
+ mix->mclk_enabled--;
+ tsc2301_power_ctrl(tsc, -1, 1);
+ if (!mix->mclk_enabled && tsc->disable_clock != NULL) {
+ tsc->disable_clock(dev);
+ }
+ mutex_unlock(&mix->mutex);
+}
+
+static void tsc2301_mixer_delayed_power_down(struct work_struct *work)
+{
+ struct tsc2301_mixer *mix = container_of(work, struct tsc2301_mixer,
+ delayed_power_down.work);
+ struct tsc2301 *tsc = mix->tsc;
+
+ mutex_lock(&mix->mutex);
+ if (!mix->delayed_pd_active) {
+ mutex_unlock(&mix->mutex);
+ return;
+ }
+ mix->delayed_pd_active = 0;
+ mutex_unlock(&mix->mutex);
+ tsc2301_mixer_disable_mclk(&tsc->spi->dev);
+}
+
+/*
+ * Allows audio controller driver to notify its usage of ADC and DAC
+ */
+void tsc2301_mixer_set_power(struct device *dev, int dac, int adc)
+{
+ struct tsc2301 *tsc = dev_get_drvdata(dev);
+
+ mutex_lock(&tsc->mixer->mutex);
+ tsc->mixer->adc_enabled = adc;
+ tsc->mixer->dac_enabled = dac;
+
+ /* update power state of all audio blocks */
+ tsc2301_power_ctrl(tsc, -1, 1);
+ mutex_unlock(&tsc->mixer->mutex);
+}
+
+/*
+ * Registers TSC2301 ALSA Mixer controls for the given sound card
+ */
+int tsc2301_mixer_register_controls(struct device *dev, struct snd_card *card)
+{
+ struct tsc2301 *tsc = dev_get_drvdata(dev);
+ struct tsc2301_mixer *mix = tsc->mixer;
+ int i, err;
+
+ /* Register ALSA mixer controls */
+ for (i = 0; i < ARRAY_SIZE(snd_tsc2301_controls); i++) {
+ err = snd_ctl_add(card,
+ snd_ctl_new1(&snd_tsc2301_controls[i], tsc));
+ if (err < 0)
+ return err;
+ }
+
+ if (!mix->n_mixer_gpios)
+ return 0;
+
+ /* Register additional GPIO controls if defined */
+ for (i = 0; i < mix->n_mixer_gpios; i++) {
+ const struct tsc2301_mixer_gpio *mg = mix->mixer_gpios + i;
+ struct snd_kcontrol *ctrlp;
+ struct snd_kcontrol_new ctrl =
+ TSC2301_BOOL((char *)mg->name, 0,
+ TSC2301_REG_GPIO, GPIO_INDEX,
+ mg->gpio, mg->inverted, mg->def_enable);
+
+ ctrlp = snd_ctl_new1(&ctrl, tsc);
+ err = snd_ctl_add(card, ctrlp);
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
+
+int tsc2301_mixer_init(struct tsc2301 *tsc,
+ struct tsc2301_platform_data *pdata)
+{
+ struct tsc2301_mixer *mix;
+ int err = 0;
+ u16 w;
+
+ mix = kzalloc(sizeof(*mix), GFP_KERNEL);
+ if (mix == NULL)
+ return -ENOMEM;
+ tsc->mixer = mix;
+
+ mix->tsc = tsc;
+ mutex_init(&mix->mutex);
+ mix->platform_init = pdata->codec_init;
+ mix->platform_cleanup = pdata->codec_cleanup;
+ mix->pll_output = pdata->pll_output;
+
+ INIT_DELAYED_WORK(&mix->delayed_power_down,
+ tsc2301_mixer_delayed_power_down);
+
+ /* initialize shadow register default values */
+ w = 0xc000;
+ w |= (pdata->mclk_ratio << 6) | (pdata->i2s_sample_rate << 2);
+ w |= pdata->i2s_format;
+ mix->shadow_regs[AUDCNTL_INDEX] = w;
+ mix->shadow_regs[ADCVOL_INDEX] = 0xd7d7;
+ mix->shadow_regs[DACVOL_INDEX] = 0xffff;
+ mix->shadow_regs[BPVOL_INDEX] = 0xe7e7;
+ mix->shadow_regs[PD_MISC_INDEX] = pdata->power_down_blocks;
+
+ /* if extra mixer controls configured, then configure associated
+ * GPIOs as output and drive their default state */
+ if (pdata->n_mixer_gpios) {
+ int i;
+
+ w = 0;
+ for (i = 0; i < pdata->n_mixer_gpios; i++) {
+ const struct tsc2301_mixer_gpio *mg;
+ int gpio;
+
+ mg = pdata->mixer_gpios + i;
+ gpio = mg->gpio;
+ w |= (1 << gpio) << 8;
+ w |= (mg->inverted ^ mg->def_enable) << gpio;
+ }
+ mix->shadow_regs[GPIO_INDEX] = w;
+
+ mix->mixer_gpios = kmalloc(sizeof(*pdata->mixer_gpios) *
+ pdata->n_mixer_gpios,
+ GFP_KERNEL);
+ if (mix->mixer_gpios == NULL) {
+ err = -ENOMEM;
+ goto err1;
+ }
+ memcpy(mix->mixer_gpios, pdata->mixer_gpios,
+ sizeof(*pdata->mixer_gpios) * pdata->n_mixer_gpios);
+ mix->n_mixer_gpios = pdata->n_mixer_gpios;
+ }
+
+ /* PLL control */
+ tsc2301_write_pll(tsc, pdata->pll_n, pdata->pll_a, pdata->pll_pdc,
+ 0, mix->pll_output ? 0 : 1);
+
+ tsc2301_flush_shadow_regs(tsc);
+
+ if (mix->platform_init != NULL) {
+ err = mix->platform_init(&tsc->spi->dev);
+ if (err < 0)
+ goto err2;
+ }
+
+ return 0;
+err2:
+ if (mix->mixer_gpios != NULL)
+ kfree(mix->mixer_gpios);
+err1:
+ kfree(mix);
+ return err;
+}
+
+void tsc2301_mixer_exit(struct tsc2301 *tsc)
+{
+ struct tsc2301_mixer *mixer = tsc->mixer;
+
+ if (mixer->platform_cleanup != NULL)
+ mixer->platform_cleanup(&tsc->spi->dev);
+
+ if (mixer->mixer_gpios != NULL)
+ kfree(mixer->mixer_gpios);
+}
+
+MODULE_AUTHOR("Jarkko Nikula <jarkko.nikula@nokia.com>");
+MODULE_LICENSE("GPL");
--
1.6.0.1.141.g445ca
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