From: Jarkko Nikula Date: Mon, 2 Apr 2007 17:21:35 +0000 (-0400) Subject: SPI: Add support for TSC2301 protocol driver X-Git-Tag: v2.6.22-omap1~10^2~5 X-Git-Url: http://www.pilppa.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=e9fb342a856822f1ed3e6806961184f8a07515b6;p=linux-2.6-omap-h63xx.git SPI: Add support for TSC2301 protocol driver This adds a driver for TSC2301 including support for audio, keypad and touchscreen. Patch is originally developed for Nokia N800 by Imre Deak, Jarkko Nikula, Jarkko Oikarinen and Juha Yrjola. Signed-off-by: Jarkko Nikula --- diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index 9daa4bb76d3..6fd6a477f67 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -198,6 +198,28 @@ config SPI_TSC2102 Say Y here if you want support for the TSC2102 chip. It will be needed for the touchscreen driver on some boards. +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 SPI_MASTER && EXPERIMENTAL diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile index d44d6516d29..bbb3ca95ee9 100644 --- a/drivers/spi/Makefile +++ b/drivers/spi/Makefile @@ -31,6 +31,9 @@ obj-$(CONFIG_SPI_AT25) += at25.o obj-$(CONFIG_SPI_SPIDEV) += spidev.o obj-$(CONFIG_SPI_TSC2101) += tsc2101.o obj-$(CONFIG_SPI_TSC2102) += tsc2102.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 00000000000..ae15ca93e65 --- /dev/null +++ b/drivers/spi/tsc2301-core.c @@ -0,0 +1,302 @@ +/* + * 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 +#include +#include +#include +#include + +#ifdef CONFIG_ARCH_OMAP +#include +#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; + spi->dev.power.power_state = PMSG_ON; + + 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_0; + 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 "); +MODULE_LICENSE("GPL"); diff --git a/drivers/spi/tsc2301-mixer.c b/drivers/spi/tsc2301-mixer.c new file mode 100644 index 00000000000..31ec87c0083 --- /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 + * 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 +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +/* 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 "); +MODULE_LICENSE("GPL"); diff --git a/include/linux/spi/tsc2301.h b/include/linux/spi/tsc2301.h new file mode 100644 index 00000000000..059cc5811f1 --- /dev/null +++ b/include/linux/spi/tsc2301.h @@ -0,0 +1,205 @@ +#ifndef _LINUX_SPI_TSC2301_H +#define _LINUX_SPI_TSC2301_H + +#include +#include + +struct tsc2301_platform_data { + /* + * Keypad + */ + s16 reset_gpio; + s16 keyb_int; + s16 keymap[16]; /* Set a key to a negative value if not used */ + unsigned kp_rep:1; /* Enable keypad repeating */ + + /* + * Touchscreen + */ + s16 dav_gpio; + s16 pen_int_gpio; + u16 ts_x_plate_ohm; + u32 ts_stab_time; /* voltage settling time */ + u8 ts_hw_avg; /* HW assiseted averaging. Can be + 0, 4, 8, 16 samples per reading */ + u32 ts_max_pressure;/* Samples with bigger pressure value will + be ignored, since the corresponding X, Y + values are unreliable */ + u32 ts_touch_pressure; /* Pressure limit until we report a + touch event. After that we switch + to ts_max_pressure. */ + unsigned ts_ignore_last : 1; + + /* + * Audio + */ + unsigned pll_pdc:4; + unsigned pll_a:4; + unsigned pll_n:4; + unsigned pll_output:1; /* Output PLL on GPIO_0 */ + + unsigned mclk_ratio:2; + unsigned i2s_sample_rate:4; + unsigned i2s_format:2; + /* Mask for audio blocks to be powered down */ + u16 power_down_blocks; + + /* Called after codec has been initialized, can be NULL */ + int (* codec_init)(struct device *tsc2301_dev); + /* Called when codec is being removed, can be NULL */ + void (* codec_cleanup)(struct device *tsc2301_dev); + int (*enable_clock)(struct device *dev); + void (*disable_clock)(struct device *dev); + int (*get_keyb_irq_state)(struct device *dev); + + const struct tsc2301_mixer_gpio { + const char *name; + unsigned gpio:4; + unsigned inverted:1; + unsigned def_enable:1; /* enable by default */ + unsigned deactivate_on_pd:1; /* power-down flag */ + } *mixer_gpios; + int n_mixer_gpios; +}; + +struct tsc2301_kp; +struct tsc2301_ts; +struct tsc2301_mixer; + +struct tsc2301 { + struct spi_device *spi; + + s16 reset_gpio; + u16 config2_shadow; + + struct tsc2301_kp *kp; + struct tsc2301_ts *ts; + struct tsc2301_mixer *mixer; + + int (*enable_clock)(struct device *dev); + void (*disable_clock)(struct device *dev); +}; + + +#define TSC2301_HZ 33000000 + +#define TSC2301_REG(page, addr) (((page) << 11) | ((addr) << 5)) +#define TSC2301_REG_TO_PAGE(reg) (((reg) >> 11) & 0x03) +#define TSC2301_REG_TO_ADDR(reg) (((reg) >> 5) & 0x1f) + +#define TSC2301_REG_X TSC2301_REG(0, 0) +#define TSC2301_REG_Y TSC2301_REG(0, 1) +#define TSC2301_REG_Z1 TSC2301_REG(0, 2) +#define TSC2301_REG_Z2 TSC2301_REG(0, 3) +#define TSC2301_REG_KPDATA TSC2301_REG(0, 4) +#define TSC2301_REG_ADC TSC2301_REG(1, 0) +#define TSC2301_REG_KEY TSC2301_REG(1, 1) +#define TSC2301_REG_DAC TSC2301_REG(1, 2) +#define TSC2301_REG_REF TSC2301_REG(1, 3) +#define TSC2301_REG_RESET TSC2301_REG(1, 4) +#define TSC2301_REG_CONFIG TSC2301_REG(1, 5) +#define TSC2301_REG_CONFIG2 TSC2301_REG(1, 6) +#define TSC2301_REG_KPMASK TSC2301_REG(1, 16) +#define TSC2301_REG_AUDCNTL TSC2301_REG(2, 0) +#define TSC2301_REG_ADCVOL TSC2301_REG(2, 1) +#define TSC2301_REG_DACVOL TSC2301_REG(2, 2) +#define TSC2301_REG_BPVOL TSC2301_REG(2, 3) +#define TSC2301_REG_KEYCTL TSC2301_REG(2, 4) +#define TSC2301_REG_PD_MISC TSC2301_REG(2, 5) +#define TSC2301_REG_GPIO TSC2301_REG(2, 6) +#define TSC2301_REG_ADCLKCFG TSC2301_REG(2, 27) + +#define TSC2301_REG_PD_MISC_APD (1 << 15) +#define TSC2301_REG_PD_MISC_AVPD (1 << 14) +#define TSC2301_REG_PD_MISC_ABPD (1 << 13) +#define TSC2301_REG_PD_MISC_HAPD (1 << 12) +#define TSC2301_REG_PD_MISC_MOPD (1 << 11) +#define TSC2301_REG_PD_MISC_DAPD (1 << 10) +#define TSC2301_REG_PD_MISC_ADPDL (1 << 9) +#define TSC2301_REG_PD_MISC_ADPDR (1 << 8) +#define TSC2301_REG_PD_MISC_PDSTS (1 << 7) +#define TSC2301_REG_PD_MISC_MIBPD (1 << 6) +#define TSC2301_REG_PD_MISC_OTSYN (1 << 2) + +/* I2S sample rate */ +#define TSC2301_I2S_SR_48000 0x00 +#define TSC2301_I2S_SR_44100 0x01 +#define TSC2301_I2S_SR_32000 0x02 +#define TSC2301_I2S_SR_24000 0x03 +#define TSC2301_I2S_SR_22050 0x04 +#define TSC2301_I2S_SR_16000 0x05 +#define TSC2301_I2S_SR_12000 0x06 +#define TSC2301_I2S_SR_11050 0x07 +#define TSC2301_I2S_SR_8000 0x08 + +/* 16-bit, MSB-first. DAC Right-Justified, ADC Left-Justified */ +#define TSC2301_I2S_FORMAT0 0x00 +/* 20-bit, MSB-first. DAC Right-Justified, ADC Left-Justified */ +#define TSC2301_I2S_FORMAT1 0x01 +/* 20-bit, MSB-first. DAC Left-Justified, ADC Left-Justified */ +#define TSC2301_I2S_FORMAT2 0x02 +/* 20-bit, MSB-first */ +#define TSC2301_I2S_FORMAT3 0x03 + +/* Master Clock Ratio */ +#define TSC2301_MCLK_256xFS 0x00 /* default */ +#define TSC2301_MCLK_384xFS 0x01 +#define TSC2301_MCLK_512xFS 0x02 + + +extern u16 tsc2301_read_reg(struct tsc2301 *tsc, int reg); +extern void tsc2301_write_reg(struct tsc2301 *tsc, int reg, u16 val); +extern void tsc2301_write_kbc(struct tsc2301 *tsc, int val); +extern void tsc2301_write_pll(struct tsc2301 *tsc, int pll_n, int pll_a, + int pll_pdc, int pct_e, int pll_o); +extern void tsc2301_read_buf(struct tsc2301 *tsc, int reg, u16 *buf, int len); + +#define TSC2301_DECL_MOD(module) \ +extern int tsc2301_##module##_init(struct tsc2301 *tsc, \ + struct tsc2301_platform_data *pdata); \ +extern void tsc2301_##module##_exit(struct tsc2301 *tsc); \ +extern int tsc2301_##module##_suspend(struct tsc2301 *tsc); \ +extern void tsc2301_##module##_resume(struct tsc2301 *tsc); + +#define TSC2301_DECL_EMPTY_MOD(module) \ +static inline int tsc2301_##module##_init(struct tsc2301 *tsc, \ + struct tsc2301_platform_data *pdata) \ +{ \ + return 0; \ +} \ +static inline void tsc2301_##module##_exit(struct tsc2301 *tsc) {} \ +static inline int tsc2301_##module##_suspend(struct tsc2301 *tsc) \ +{ \ + return 0; \ +} \ +static inline void tsc2301_##module##_resume(struct tsc2301 *tsc) {} + +#ifdef CONFIG_KEYBOARD_TSC2301 +TSC2301_DECL_MOD(kp) +void tsc2301_kp_restart(struct tsc2301 *tsc); +#else +TSC2301_DECL_EMPTY_MOD(kp) +static inline void tsc2301_kp_restart(struct tsc2301 *tsc) {} +#endif + +#ifdef CONFIG_TOUCHSCREEN_TSC2301 +TSC2301_DECL_MOD(ts) +#else +TSC2301_DECL_EMPTY_MOD(ts) +#endif + +#ifdef CONFIG_SPI_TSC2301_AUDIO +TSC2301_DECL_MOD(mixer) +extern void tsc2301_mixer_set_power(struct device *tsc_dev, int dac, int adc); + +struct snd_card; +extern int tsc2301_mixer_register_controls(struct device *tsc_dev, + struct snd_card *card); +#else +TSC2301_DECL_EMPTY_MOD(mixer) +#endif + +extern void tsc2301_mixer_enable_mclk(struct device *tsc_dev); +extern void tsc2301_mixer_disable_mclk(struct device *tsc_dev); + +#endif