This driver can also be built as a module. If so, the module
will be called at25.
+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_KEYPAD
+ boolean "TSC2301 keypad support"
+ depends on SPI_TSC2301
+ select INPUT_KEYBOARD
+ help
+ Say Y here for if you are using the keypad features of TSC2301.
+
+config SPI_TSC2301_TOUCHSCREEN
+ boolean "TSC2301 touchscreen support"
+ depends on SPI_TSC2301
+ select INPUT_TOUCHSCREEN
+ help
+ Say Y here for if you are using the touchscreen features of 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.
+
#
# Add new SPI protocol masters in alphabetical order above this line
#
# SPI protocol drivers (device/link on bus)
obj-$(CONFIG_TSC2102) += tsc2102.o
obj-$(CONFIG_SPI_AT25) += at25.o
+obj-$(CONFIG_SPI_TSC2301) += tsc2301.o
+tsc2301-objs := tsc2301-core.o
+tsc2301-$(CONFIG_SPI_TSC2301_TOUCHSCREEN) += tsc2301-ts.o
+tsc2301-$(CONFIG_SPI_TSC2301_KEYPAD) += tsc2301-kp.o
+tsc2301-$(CONFIG_SPI_TSC2301_AUDIO) += tsc2301-mixer.o
# ... add above this line ...
# SPI slave controller drivers (upstream link)
--- /dev/null
+/*
+ * 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 <asm/arch/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;
+ 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 <juha.yrjola@nokia.com>");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * TSC2301 keypad driver
+ *
+ * Copyright (C) 2005-2006 Nokia Corporation
+ *
+ * Written by Jarkko Oikarinen
+ * Rewritten by Juha Yrjola <juha.yrjola@nokia.com>
+ *
+ * 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/kernel.h>
+#include <linux/module.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/delay.h>
+#include <linux/spi/spi.h>
+
+#ifdef CONFIG_ARCH_OMAP
+#include <asm/arch/gpio.h>
+#endif
+
+#include <linux/spi/tsc2301.h>
+
+#define TSC2301_KEYBOARD_PRODUCT_ID 0x0051
+#define TSC2301_KEYBOARD_PRODUCT_VERSION 0x0001
+#define TSC2301_DEBOUNCE_TIME_2MS 0x0000
+#define TSC2301_DEBOUNCE_TIME_10MS 0x0800
+#define TSC2301_DEBOUNCE_TIME_20MS 0x1000
+#define TSC2301_DEBOUNCE_TIME_50MS 0x1800
+#define TSC2301_DEBOUNCE_TIME_60MS 0x2000
+#define TSC2301_DEBOUNCE_TIME_80MS 0x2800
+#define TSC2301_DEBOUNCE_TIME_100MS 0x3000
+#define TSC2301_DEBOUNCE_TIME_120MS 0x3800
+
+#define TSC2301_DEBOUNCE_TIME TSC2301_DEBOUNCE_TIME_20MS
+
+#define TSC2301_POLL_TIME 30
+
+struct tsc2301_kp {
+ struct input_dev *idev;
+ char phys[32];
+ spinlock_t lock;
+ struct mutex mutex;
+ struct timer_list timer;
+ u16 keys_pressed;
+ unsigned pending:1;
+ unsigned user_disabled:1;
+ unsigned disable_depth;
+
+ struct spi_transfer read_xfer[4];
+ struct spi_message read_msg;
+ u16 state;
+ u16 data;
+ u16 mask;
+
+ int irq;
+ s16 keymap[16];
+
+ int (*get_keyb_irq_state)(struct device *dev);
+};
+
+static inline int tsc2301_kp_disabled(struct tsc2301 *tsc)
+{
+ return tsc->kp->disable_depth != 0;
+}
+
+static inline void tsc2301_kp_set_keypressed_state(struct tsc2301 *tsc)
+{
+ struct tsc2301_kp *kp = tsc->kp;
+
+ /* kp->state is updated only if we don't have the callback */
+ if (kp->get_keyb_irq_state != NULL) {
+ if (kp->get_keyb_irq_state(&tsc->spi->dev))
+ kp->state = 1 << 15;
+ else
+ kp->state = 0;
+ }
+}
+
+static inline int tsc2301_kp_key_is_pressed(struct tsc2301 *tsc)
+{
+ return tsc->kp->state & (1 << 15);
+}
+
+static void tsc2301_kp_send_key_events(struct tsc2301 *tsc,
+ u16 prev_state,
+ u16 new_state)
+{
+ struct tsc2301_kp *kp = tsc->kp;
+ u16 common, released, pressed;
+ int i;
+
+ common = prev_state & new_state;
+ released = common ^ prev_state;
+ pressed = common ^ new_state;
+ if (!released && !pressed)
+ return;
+ for (i = 0; i < 16 && (released || pressed); i++) {
+ if (released & 1) {
+ dev_dbg(&tsc->spi->dev, "key %d released\n", i);
+ input_report_key(kp->idev, kp->keymap[i], 0);
+ }
+ released >>= 1;
+ if (pressed & 1) {
+ dev_dbg(&tsc->spi->dev, "key %d pressed\n", i);
+ input_report_key(kp->idev, kp->keymap[i], 1);
+ }
+ pressed >>= 1;
+ }
+ input_sync(kp->idev);
+}
+
+static inline void tsc2301_kp_release_all_keys(struct tsc2301 *tsc)
+{
+ struct tsc2301_kp *kp = tsc->kp;
+ unsigned long flags;
+ int keys_pressed;
+
+ spin_lock_irqsave(&kp->lock, flags);
+ keys_pressed = kp->keys_pressed;
+ kp->keys_pressed = 0;
+ spin_unlock_irqrestore(&kp->lock, flags);
+ if (keys_pressed)
+ tsc2301_kp_send_key_events(tsc, keys_pressed, 0);
+}
+
+static inline void _filter_out(struct tsc2301 *tsc, u16 prev_state,
+ u16 *new_state, int row1, int row2, u8 rect_pat)
+{
+ u16 mask;
+
+ mask = (rect_pat << (row1 * 4)) | (rect_pat << (row2 * 4));
+ mask &= ~prev_state;
+ *new_state &= ~mask;
+ dev_dbg(&tsc->spi->dev, "filtering ghost keys %02x\n", mask);
+}
+
+static void tsc2301_filter_ghost_keys(struct tsc2301 *tsc, u16 prev_state,
+ u16 *new_state)
+{
+ int row1, row2;
+ u16 key_map;
+ u16 row1_map;
+ static const u8 rect_pat[] = {
+ 0x3, 0x5, 0x9, 0x6, 0xa, 0xc, 0,
+ };
+
+ key_map = *new_state;
+ for (row1 = 0; row1 < 4; row1++) {
+ row1_map = (key_map >> (row1 * 4)) & 0xf;
+ if (!row1_map)
+ continue;
+ for (row2 = row1 + 1; row2 < 4; row2++) {
+ u16 rect_map = (key_map >> (row2 * 4)) & 0xf;
+ const u8 *rp;
+
+ rect_map &= row1_map;
+ if (!rect_map)
+ continue;
+ for (rp = rect_pat; *rp; rp++)
+ if ((rect_map & *rp) == *rp)
+ _filter_out(tsc, prev_state, new_state,
+ row1, row2, *rp);
+ }
+ }
+}
+
+static void tsc2301_kp_timer(unsigned long arg)
+{
+ struct tsc2301 *tsc = (void *) arg;
+ int r;
+
+ /* This needs to be done early enough, since reading the key data
+ * register clears the IRQ line, which may be used to determine
+ * the key pressed state.
+ */
+ tsc2301_kp_set_keypressed_state(tsc);
+ r = spi_async(tsc->spi, &tsc->kp->read_msg);
+ if (unlikely(r < 0 && printk_ratelimit()))
+ dev_err(&tsc->spi->dev, "kp: spi_async() failed");
+}
+
+static void tsc2301_kp_rx(void *arg)
+{
+ struct tsc2301 *tsc = arg;
+ struct tsc2301_kp *kp = tsc->kp;
+ unsigned long flags;
+ int key_pressed;
+ u16 kp_data;
+
+ kp_data = kp->data;
+ key_pressed = tsc2301_kp_key_is_pressed(tsc);
+ dev_dbg(&tsc->spi->dev, "KP data %04x (%s)\n",
+ kp_data, key_pressed ? "pressed" : "not pressed");
+ if (!key_pressed)
+ kp_data = 0;
+ else
+ tsc2301_filter_ghost_keys(tsc, kp->keys_pressed, &kp_data);
+ tsc2301_kp_send_key_events(tsc, kp->keys_pressed, kp_data);
+ kp->keys_pressed = kp_data;
+ spin_lock_irqsave(&kp->lock, flags);
+ if (likely(!tsc2301_kp_disabled(tsc))) {
+ if (likely(key_pressed))
+ mod_timer(&kp->timer,
+ jiffies + msecs_to_jiffies(TSC2301_POLL_TIME));
+ else {
+ kp->pending = 0;
+ enable_irq(kp->irq);
+ }
+ } else
+ kp->pending = 0;
+ spin_unlock_irqrestore(&kp->lock, flags);
+}
+
+static irqreturn_t tsc2301_kp_irq_handler(int irq, void *dev_id)
+{
+ struct tsc2301 *tsc = dev_id;
+ struct tsc2301_kp *kp = tsc->kp;
+ unsigned long flags;
+
+ spin_lock_irqsave(&kp->lock, flags);
+ BUG_ON(kp->pending);
+ if (tsc2301_kp_disabled(tsc)) {
+ spin_unlock_irqrestore(&kp->lock, flags);
+ return IRQ_HANDLED;
+ }
+ kp->pending = 1;
+ disable_irq_nosync(irq);
+ spin_unlock_irqrestore(&kp->lock, flags);
+ tsc2301_kp_timer((unsigned long) tsc);
+ return IRQ_HANDLED;
+}
+
+static void tsc2301_kp_start_scan(struct tsc2301 *tsc)
+{
+ tsc2301_write_reg(tsc, TSC2301_REG_KPMASK, tsc->kp->mask);
+ tsc2301_write_reg(tsc, TSC2301_REG_KEY, TSC2301_DEBOUNCE_TIME);
+}
+
+static void tsc2301_kp_stop_scan(struct tsc2301 *tsc)
+{
+ tsc2301_write_reg(tsc, TSC2301_REG_KEY, 1 << 14);
+ tsc2301_write_reg(tsc, TSC2301_REG_KPMASK, 0xffff);
+}
+
+/* Must be called with the mutex held */
+static void tsc2301_kp_enable(struct tsc2301 *tsc)
+{
+ struct tsc2301_kp *kp = tsc->kp;
+ unsigned long flags;
+
+ spin_lock_irqsave(&kp->lock, flags);
+ BUG_ON(!tsc2301_kp_disabled(tsc));
+ if (--kp->disable_depth != 0) {
+ spin_unlock_irqrestore(&kp->lock, flags);
+ return;
+ }
+ if (kp->keys_pressed)
+ kp->pending = 1;
+ spin_unlock_irqrestore(&kp->lock, flags);
+
+ set_irq_type(kp->irq, IRQT_FALLING);
+ tsc2301_kp_start_scan(tsc);
+ if (kp->pending)
+ /* continue an interrupted polling */
+ mod_timer(&kp->timer,
+ jiffies + msecs_to_jiffies(TSC2301_POLL_TIME));
+ else
+ enable_irq(kp->irq);
+}
+
+/* Must be called with the mutex held */
+static int tsc2301_kp_disable(struct tsc2301 *tsc, int release_keys)
+{
+ struct tsc2301_kp *kp = tsc->kp;
+ unsigned long flags;
+
+ spin_lock_irqsave(&kp->lock, flags);
+ if (kp->disable_depth++ != 0) {
+ spin_unlock_irqrestore(&kp->lock, flags);
+ goto out;
+ }
+ if (!kp->pending)
+ disable_irq_nosync(kp->irq);
+
+ while (kp->pending) {
+ spin_unlock_irqrestore(&kp->lock, flags);
+ msleep(1);
+ spin_lock_irqsave(&kp->lock, flags);
+ }
+ spin_unlock_irqrestore(&kp->lock, flags);
+
+ tsc2301_kp_stop_scan(tsc);
+ set_irq_type(kp->irq, IRQT_NOEDGE);
+out:
+ if (release_keys)
+ tsc2301_kp_release_all_keys(tsc);
+
+ return 0;
+}
+
+/* The following workaround is needed for a HW bug triggered by the
+ * following:
+ * 1. keep any key pressed
+ * 2. disable keypad
+ * 3. release all keys
+ * 4. reenable keypad
+ * 5. disable touch screen controller
+ *
+ * After this the keypad scanner will get stuck in busy state and won't
+ * report any interrupts for further keypresses. One way to recover is to
+ * restart the keypad scanner whenever we enable / disable the
+ * touchscreen controller.
+ */
+void tsc2301_kp_restart(struct tsc2301 *tsc)
+{
+ struct tsc2301_kp *kp = tsc->kp;
+
+ mutex_lock(&kp->mutex);
+ if (!kp->user_disabled) {
+ tsc2301_kp_disable(tsc, 0);
+ tsc2301_kp_enable(tsc);
+ }
+ mutex_unlock(&kp->mutex);
+}
+
+static ssize_t tsc2301_kp_disable_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct tsc2301 *tsc = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%u\n", tsc2301_kp_disabled(tsc) ? 1 : 0);
+}
+
+static ssize_t tsc2301_kp_disable_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct tsc2301 *tsc = dev_get_drvdata(dev);
+ struct tsc2301_kp *kp = tsc->kp;
+ char *endp;
+ int i;
+
+ i = simple_strtoul(buf, &endp, 10);
+ i = i ? 1 : 0;
+
+ mutex_lock(&kp->mutex);
+ if (i == kp->user_disabled) {
+ mutex_unlock(&kp->mutex);
+ return count;
+ }
+ kp->user_disabled = i;
+
+ if (i)
+ tsc2301_kp_disable(tsc, 1);
+ else
+ tsc2301_kp_enable(tsc);
+ mutex_unlock(&kp->mutex);
+
+ return count;
+}
+
+static DEVICE_ATTR(disable_kp, 0664, tsc2301_kp_disable_show,
+ tsc2301_kp_disable_store);
+
+static const u16 tsc2301_kp_read_data = 0x8000 | TSC2301_REG_KPDATA;
+static const u16 tsc2301_kp_read_state = 0x8000 | TSC2301_REG_KEY;
+
+static void tsc2301_kp_setup_spi_xfer(struct tsc2301 *tsc)
+{
+ struct tsc2301_kp *kp = tsc->kp;
+ struct spi_message *m = &kp->read_msg;
+ struct spi_transfer *x = &kp->read_xfer[0];
+
+ spi_message_init(&kp->read_msg);
+
+ if (kp->get_keyb_irq_state == NULL) {
+ /* No platform specific way for determining the keypress
+ * state, so we'll need an extra status register read.
+ */
+ x->tx_buf = &tsc2301_kp_read_state;
+ x->len = 2;
+ spi_message_add_tail(x, m);
+ x++;
+
+ x->rx_buf = &kp->state;
+ x->len = 2;
+ x->cs_change = 1;
+ spi_message_add_tail(x, m);
+ x++;
+ }
+
+ x->tx_buf = &tsc2301_kp_read_data;
+ x->len = 2;
+ spi_message_add_tail(x, m);
+ x++;
+
+ x->rx_buf = &kp->data;
+ x->len = 2;
+ spi_message_add_tail(x, m);
+
+ m->complete = tsc2301_kp_rx;
+ m->context = tsc;
+}
+
+#ifdef CONFIG_PM
+int tsc2301_kp_suspend(struct tsc2301 *tsc)
+{
+ struct tsc2301_kp *kp = tsc->kp;
+
+ mutex_lock(&kp->mutex);
+ tsc2301_kp_disable(tsc, 1);
+ mutex_unlock(&kp->mutex);
+ return 0;
+}
+
+void tsc2301_kp_resume(struct tsc2301 *tsc)
+{
+ struct tsc2301_kp *kp = tsc->kp;
+
+ mutex_lock(&kp->mutex);
+ tsc2301_kp_enable(tsc);
+ mutex_unlock(&kp->mutex);
+}
+#endif
+
+int __devinit tsc2301_kp_init(struct tsc2301 *tsc,
+ struct tsc2301_platform_data *pdata)
+{
+ struct input_dev *idev;
+ struct tsc2301_kp *kp;
+ int r, i;
+ u16 mask;
+
+ if (pdata->keyb_int < 0) {
+ dev_err(&tsc->spi->dev, "need kbirq");
+ return -EINVAL;
+ }
+
+ kp = kzalloc(sizeof(*kp), GFP_KERNEL);
+ if (kp == NULL)
+ return -ENOMEM;
+ tsc->kp = kp;
+
+ kp->irq = pdata->keyb_int;
+ spin_lock_init(&kp->lock);
+ mutex_init(&kp->mutex);
+
+ init_timer(&kp->timer);
+ kp->timer.data = (unsigned long) tsc;
+ kp->timer.function = tsc2301_kp_timer;
+
+ kp->get_keyb_irq_state = pdata->get_keyb_irq_state;
+
+ idev = input_allocate_device();
+ if (idev == NULL) {
+ r = -ENOMEM;
+ goto err1;
+ }
+ idev->name = "TSC2301 keypad";
+ snprintf(kp->phys, sizeof(kp->phys), "%s/input-kp", tsc->spi->dev.bus_id);
+ idev->phys = kp->phys;
+
+ mask = 0;
+ idev->evbit[0] = BIT(EV_KEY);
+ for (i = 0; i < 16; i++) {
+ if (pdata->keymap[i] > 0) {
+ set_bit(pdata->keymap[i], idev->keybit);
+ kp->keymap[i] = pdata->keymap[i];
+ } else {
+ kp->keymap[i] = -1;
+ mask |= 1 << i;
+ }
+ }
+
+ if (pdata->kp_rep)
+ set_bit(EV_REP, idev->evbit);
+
+ kp->idev = idev;
+
+ tsc2301_kp_setup_spi_xfer(tsc);
+
+ r = device_create_file(&tsc->spi->dev, &dev_attr_disable_kp);
+ if (r < 0)
+ goto err2;
+
+ tsc2301_kp_start_scan(tsc);
+
+ /* IRQ mode 0 is faulty, it can cause the KBIRQ to get stuck.
+ * Mode 2 deasserts the IRQ at:
+ * - HW or SW reset
+ * - Setting SCS flag in REG_KEY register
+ * - Releasing all keys
+ * - Reading the REG_KPDATA
+ */
+ tsc2301_write_kbc(tsc, 2);
+
+ tsc2301_write_reg(tsc, TSC2301_REG_KPMASK, mask);
+ kp->mask = mask;
+
+ set_irq_type(kp->irq, IRQT_FALLING);
+
+ r = request_irq(kp->irq, tsc2301_kp_irq_handler, SA_SAMPLE_RANDOM,
+ "tsc2301-kp", tsc);
+ if (r < 0) {
+ dev_err(&tsc->spi->dev, "unable to get kbirq IRQ");
+ goto err3;
+ }
+ set_irq_wake(kp->irq, 1);
+
+ /* We need to read the register once..? */
+ tsc2301_read_reg(tsc, TSC2301_REG_KPDATA);
+
+ r = input_register_device(idev);
+ if (r < 0) {
+ dev_err(&tsc->spi->dev, "can't register keypad device\n");
+ goto err4;
+ }
+
+ return 0;
+
+err4:
+ free_irq(kp->irq, tsc);
+err3:
+ tsc2301_kp_stop_scan(tsc);
+ device_remove_file(&tsc->spi->dev, &dev_attr_disable_kp);
+err2:
+ input_free_device(kp->idev);
+err1:
+ kfree(kp);
+ return r;
+}
+
+void __devexit tsc2301_kp_exit(struct tsc2301 *tsc)
+{
+ struct tsc2301_kp *kp = tsc->kp;
+
+ tsc2301_kp_disable(tsc, 1);
+ input_unregister_device(kp->idev);
+ free_irq(kp->irq, tsc);
+ device_remove_file(&tsc->spi->dev, &dev_attr_disable_kp);
+
+ kfree(kp);
+}
--- /dev/null
+/*
+ * drivers/spi/tsc2301-mixer.c
+ *
+ * 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>
+
+#ifdef TSC2301_MIXER_SELF_REGISTRATION
+static char *id = NULL;
+MODULE_PARM_DESC(id, "TSC2301 ALSA Mixer Driver");
+#endif
+
+/* 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;
+
+#ifdef TSC2301_MIXER_SELF_REGISTRATION
+ struct snd_card *card;
+#endif
+
+ /* 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;
+}
+
+#ifdef TSC2301_MIXER_SELF_REGISTRATION
+static int tsc2301_mixer_register_card(struct tsc2301 *tsc)
+{
+ struct snd_card *card;
+ int err;
+
+ /* create new sound card instance */
+ card = snd_card_new(-1, id, THIS_MODULE, 0);
+ if (card == NULL)
+ return -ENOMEM;
+
+ tsc->mixer->card = card;
+
+ strcpy(card->driver, "TSC2301");
+ strcpy(card->shortname, "TSC2301");
+ sprintf(card->longname, "TSC2301 ALSA Mixer");
+ strcpy(card->mixername, "TSC2301 Mixer");
+
+ /* register mixer controls for the sound card */
+ if ((err = tsc2301_mixer_register_controls(&tsc->spi->dev, card)) != 0)
+ goto err1;
+
+ /* register the sound card instance */
+ if ((err = snd_card_register(card)) != 0)
+ goto err1;
+
+ printk(KERN_INFO "TSC2301 ALSA Mixer support initialized\n");
+
+ return 0;
+err1:
+ snd_card_free(card);
+ return err;
+}
+#endif
+
+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);
+
+#ifdef TSC2301_MIXER_SELF_REGISTRATION
+ err = tsc2301_mixer_register_card(tsc);
+ if (err < 0)
+ goto err2;
+#endif
+
+ if (mix->platform_init != NULL) {
+ err = mix->platform_init(&tsc->spi->dev);
+ if (err < 0)
+ goto err3;
+ }
+
+ return 0;
+err3:
+#ifdef TSC2301_MIXER_SELF_REGISTRATION
+ snd_card_free(mix->card);
+err2:
+#endif
+ 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;
+
+#ifdef TSC2301_MIXER_SELF_REGISTRATION
+ snd_card_free(mixer->card);
+#endif
+
+ 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");
--- /dev/null
+/*
+ * TSC2301 touchscreen driver
+ *
+ * Copyright (C) 2005-2006 Nokia Corporation
+ *
+ * Written by Jarkko Oikarinen, Imre Deak and Juha Yrjola
+ *
+ * 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/kernel.h>
+#include <linux/module.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/spi/spi.h>
+
+#ifdef CONFIG_ARCH_OMAP
+#include <asm/arch/gpio.h>
+#endif
+
+#include <linux/spi/tsc2301.h>
+
+/**
+ * The touchscreen interface operates as follows:
+ *
+ * Initialize:
+ * Request access to GPIO103 (DAV)
+ * tsc2301_dav_irq_handler will trigger when DAV line goes down
+ *
+ * 1) Pen is pressed against touchscreeen
+ * 2) TSC2301 performs AD conversion
+ * 3) After the conversion is done TSC2301 drives DAV line down
+ * 4) GPIO IRQ is received and tsc2301_dav_irq_handler is called
+ * 5) tsc2301_dav_irq_handler sets up tsc2301_ts_timer in TSC2301_TS_SCAN_TIME
+ * 6) tsc2301_ts_timer disables the irq and requests spi driver
+ * to read X, Y, Z1 and Z2
+ * 7) SPI framework calls tsc2301_ts_rx after the coordinates are read
+ * 8) tsc2301_ts_rx reports coordinates to input layer and
+ * sets up tsc2301_ts_timer to be called after TSC2301_TS_SCAN_TIME
+ * 9) if tsc2301_tx_timer notices that the pen has been lifted, the lift event
+ * is sent, and irq is again enabled.
+ */
+
+
+#define TSC2301_TOUCHSCREEN_PRODUCT_ID 0x0052
+#define TSC2301_TOUCHSCREEN_PRODUCT_VERSION 0x0001
+
+#define TSC2301_TS_SCAN_TIME 1
+
+#define TSC2301_ADCREG_CONVERSION_CTRL_BY_TSC2301 0x8000
+#define TSC2301_ADCREG_CONVERSION_CTRL_BY_HOST 0x0000
+
+#define TSC2301_ADCREG_FUNCTION_NONE 0x0000
+#define TSC2301_ADCREG_FUNCTION_XY 0x0400
+#define TSC2301_ADCREG_FUNCTION_XYZ 0x0800
+#define TSC2301_ADCREG_FUNCTION_X 0x0C00
+#define TSC2301_ADCREG_FUNCTION_Y 0x1000
+#define TSC2301_ADCREG_FUNCTION_Z 0x1400
+#define TSC2301_ADCREG_FUNCTION_DAT1 0x1800
+#define TSC2301_ADCREG_FUNCTION_DAT2 0x1C00
+#define TSC2301_ADCREG_FUNCTION_AUX1 0x2000
+#define TSC2301_ADCREG_FUNCTION_AUX2 0x2400
+#define TSC2301_ADCREG_FUNCTION_TEMP 0x2800
+
+#define TSC2301_ADCREG_RESOLUTION_8BIT 0x0100
+#define TSC2301_ADCREG_RESOLUTION_10BIT 0x0200
+#define TSC2301_ADCREG_RESOLUTION_12BIT 0x0300
+
+#define TSC2301_ADCREG_AVERAGING_NONE 0x0000
+#define TSC2301_ADCREG_AVERAGING_4AVG 0x0040
+#define TSC2301_ADCREG_AVERAGING_8AVG 0x0080
+#define TSC2301_ADCREG_AVERAGING_16AVG 0x00C0
+
+#define TSC2301_ADCREG_CLOCK_8MHZ 0x0000
+#define TSC2301_ADCREG_CLOCK_4MHZ 0x0010
+#define TSC2301_ADCREG_CLOCK_2MHZ 0x0020
+#define TSC2301_ADCREG_CLOCK_1MHZ 0x0030
+
+#define TSC2301_ADCREG_VOLTAGE_STAB_0US 0x0000
+#define TSC2301_ADCREG_VOLTAGE_STAB_100US 0x0002
+#define TSC2301_ADCREG_VOLTAGE_STAB_500US 0x0004
+#define TSC2301_ADCREG_VOLTAGE_STAB_1MS 0x0006
+#define TSC2301_ADCREG_VOLTAGE_STAB_5MS 0x0008
+#define TSC2301_ADCREG_VOLTAGE_STAB_10MS 0x000A
+#define TSC2301_ADCREG_VOLTAGE_STAB_50MS 0x000C
+#define TSC2301_ADCREG_VOLTAGE_STAB_100MS 0x000E
+
+#define TSC2301_ADCREG_STOP_CONVERSION 0x4000
+
+#define MAX_12BIT ((1 << 12) - 1)
+
+struct tsc2301_ts {
+ struct input_dev *idev;
+ char phys[32];
+ struct timer_list timer;
+ spinlock_t lock;
+
+ struct spi_transfer read_xfer[2];
+ struct spi_message read_msg;
+ u16 data[4];
+
+ int hw_avg_max;
+ u16 x;
+ u16 y;
+ u16 p;
+ int sample_cnt;
+
+ int ignore_last : 1;
+ u16 x_plate_ohm;
+ int stab_time;
+ int max_pressure;
+ int touch_pressure;
+ int pressure_limit;
+
+ u16 irq_enabled:1;
+ u16 pen_down:1;
+ u16 disabled:1;
+ u16 pending:1;
+
+ int hw_flags;
+
+ s16 dav_gpio;
+ int irq;
+};
+
+
+static const u16 tsc2301_ts_read_data = 0x8000 | TSC2301_REG_X;
+
+static int tsc2301_ts_check_config(struct tsc2301_ts *ts, int *hw_flags)
+{
+ int flags;
+
+ flags = 0;
+ switch (ts->hw_avg_max) {
+ case 0:
+ flags |= TSC2301_ADCREG_AVERAGING_NONE;
+ break;
+ case 4:
+ flags |= TSC2301_ADCREG_AVERAGING_4AVG;
+ break;
+ case 8:
+ flags |= TSC2301_ADCREG_AVERAGING_8AVG;
+ break;
+ case 16:
+ flags |= TSC2301_ADCREG_AVERAGING_16AVG;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (ts->stab_time) {
+ case 0:
+ flags |= TSC2301_ADCREG_VOLTAGE_STAB_0US;
+ break;
+ case 100:
+ flags |= TSC2301_ADCREG_VOLTAGE_STAB_100US;
+ break;
+ case 500:
+ flags |= TSC2301_ADCREG_VOLTAGE_STAB_500US;
+ break;
+ case 1000:
+ flags |= TSC2301_ADCREG_VOLTAGE_STAB_1MS;
+ break;
+ case 5000:
+ flags |= TSC2301_ADCREG_VOLTAGE_STAB_5MS;
+ break;
+ case 10000:
+ flags |= TSC2301_ADCREG_VOLTAGE_STAB_10MS;
+ break;
+ case 50000:
+ flags |= TSC2301_ADCREG_VOLTAGE_STAB_50MS;
+ break;
+ case 100000:
+ flags |= TSC2301_ADCREG_VOLTAGE_STAB_100MS;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ *hw_flags = flags;
+ return 0;
+}
+
+/*
+ * This odd three-time initialization is to work around a bug in TSC2301.
+ * See TSC2301 errata for details.
+ */
+static int tsc2301_ts_configure(struct tsc2301 *tsc, int flags)
+{
+ struct spi_transfer xfer[3];
+ struct spi_transfer *x;
+ struct spi_message m;
+ int reg = TSC2301_REG_ADC;
+ u16 val1, val2, val3;
+ u16 data[6];
+
+ val1 = TSC2301_ADCREG_CONVERSION_CTRL_BY_HOST |
+ TSC2301_ADCREG_STOP_CONVERSION |
+ TSC2301_ADCREG_FUNCTION_NONE |
+ TSC2301_ADCREG_RESOLUTION_12BIT |
+ TSC2301_ADCREG_AVERAGING_NONE |
+ TSC2301_ADCREG_CLOCK_2MHZ |
+ TSC2301_ADCREG_VOLTAGE_STAB_100MS;
+
+ val2 = TSC2301_ADCREG_CONVERSION_CTRL_BY_HOST |
+ TSC2301_ADCREG_FUNCTION_XYZ |
+ TSC2301_ADCREG_RESOLUTION_12BIT |
+ TSC2301_ADCREG_AVERAGING_16AVG |
+ TSC2301_ADCREG_CLOCK_1MHZ |
+ TSC2301_ADCREG_VOLTAGE_STAB_100MS;
+
+ /* Averaging and voltage stabilization settings in flags */
+ val3 = TSC2301_ADCREG_CONVERSION_CTRL_BY_TSC2301 |
+ TSC2301_ADCREG_FUNCTION_XYZ |
+ TSC2301_ADCREG_RESOLUTION_12BIT |
+ TSC2301_ADCREG_CLOCK_1MHZ |
+ flags;
+
+ /* Now we prepare the command for transferring */
+ data[0] = reg;
+ data[1] = val1;
+ data[2] = reg;
+ data[3] = val2;
+ data[4] = reg;
+ data[5] = val3;
+
+ spi_message_init(&m);
+ m.spi = tsc->spi;
+
+ memset(xfer, 0, sizeof(xfer));
+ x = &xfer[0];
+
+ x->tx_buf = &data[0];
+ x->len = 4;
+ x->cs_change = 1;
+ spi_message_add_tail(x, &m);
+
+ x++;
+ x->tx_buf = &data[2];
+ x->len = 4;
+ x->cs_change = 1;
+ spi_message_add_tail(x, &m);
+
+ x++;
+ x->tx_buf = &data[4];
+ x->len = 4;
+ spi_message_add_tail(x, &m);
+
+ spi_sync(m.spi, &m);
+
+ return 0;
+}
+
+static void tsc2301_ts_start_scan(struct tsc2301 *tsc)
+{
+ tsc2301_ts_configure(tsc, tsc->ts->hw_flags);
+}
+
+static void tsc2301_ts_stop_scan(struct tsc2301 *tsc)
+{
+ tsc2301_ts_configure(tsc, TSC2301_ADCREG_STOP_CONVERSION);
+}
+
+static int device_suspended(struct device *dev)
+{
+ struct tsc2301 *tsc = dev_get_drvdata(dev);
+ return dev->power.power_state.event != PM_EVENT_ON || tsc->ts->disabled;
+}
+
+static void update_pen_state(struct tsc2301_ts *ts, int x, int y, int pressure)
+{
+ int sync = 0;
+
+ if (pressure) {
+ input_report_abs(ts->idev, ABS_X, x);
+ input_report_abs(ts->idev, ABS_Y, y);
+ input_report_abs(ts->idev, ABS_PRESSURE, pressure);
+ if (!ts->pen_down)
+ input_report_key(ts->idev, BTN_TOUCH, 1);
+ sync = 1;
+ } else if (ts->pen_down) {
+ input_report_abs(ts->idev, ABS_PRESSURE, 0);
+ input_report_key(ts->idev, BTN_TOUCH, 0);
+ sync = 1;
+ }
+
+ if (sync)
+ input_sync(ts->idev);
+
+ ts->pen_down = pressure ? 1 : 0;
+#ifdef VERBOSE
+ dev_dbg(&tsc->spi->dev, "x %4d y %4d p %4d\n", x, y, pressure);
+#endif
+}
+
+/*
+ * This procedure is called by the SPI framework after the coordinates
+ * have been read from TSC2301
+ */
+static void tsc2301_ts_rx(void *arg)
+{
+ struct tsc2301 *tsc = arg;
+ struct tsc2301_ts *ts = tsc->ts;
+ unsigned int x, y, z1, z2, pressure;
+
+ x = ts->data[0];
+ y = ts->data[1];
+ z1 = ts->data[2];
+ z2 = ts->data[3];
+
+ if (z1) {
+ pressure = ts->x_plate_ohm * x;
+ pressure /= 4096;
+ pressure *= z2 - z1;
+ pressure /= z1;
+ } else
+ pressure = 0;
+
+ /* If pressure value is above a preset limit (pen is barely
+ * touching the screen) we can't trust the coordinate values.
+ */
+ if (pressure < ts->pressure_limit && x < MAX_12BIT && y < MAX_12BIT) {
+ ts->pressure_limit = ts->max_pressure;
+ if (ts->ignore_last) {
+ if (ts->sample_cnt)
+ update_pen_state(ts, ts->x, ts->y, ts->p);
+ ts->x = x;
+ ts->y = y;
+ ts->p = pressure;
+ } else
+ update_pen_state(ts, x, y, pressure);
+ ts->sample_cnt++;
+ }
+
+ mod_timer(&ts->timer,
+ jiffies + msecs_to_jiffies(TSC2301_TS_SCAN_TIME));
+}
+
+static int is_pen_down(struct tsc2301_ts *ts)
+{
+ return ts->pen_down;
+}
+
+/*
+ * Timer is called every TSC2301_TS_SCAN_TIME when the pen is down
+ */
+static void tsc2301_ts_timer(unsigned long arg)
+{
+ struct tsc2301 *tsc = (void *) arg;
+ struct tsc2301_ts *ts = tsc->ts;
+ unsigned long flags;
+ int ndav;
+ int r;
+
+ spin_lock_irqsave(&ts->lock, flags);
+ ndav = omap_get_gpio_datain(ts->dav_gpio);
+ if (ndav || device_suspended(&tsc->spi->dev)) {
+ /* Pen has been lifted */
+ if (!device_suspended(&tsc->spi->dev)) {
+ ts->irq_enabled = 1;
+ enable_irq(ts->irq);
+ }
+ update_pen_state(ts, 0, 0, 0);
+ ts->pending = 0;
+ spin_unlock_irqrestore(&ts->lock, flags);
+
+ } else {
+ ts->pen_down = 1;
+ spin_unlock_irqrestore(&ts->lock, flags);
+
+ r = spi_async(tsc->spi, &ts->read_msg);
+ if (r)
+ dev_err(&tsc->spi->dev, "ts: spi_async() failed");
+ }
+}
+
+/*
+ * This interrupt is called when pen is down and first coordinates are
+ * available. That is indicated by a falling edge on DEV line. IRQ is
+ * disabled here because while the pen is down the coordinates are
+ * read by a timer.
+ */
+static irqreturn_t tsc2301_ts_irq_handler(int irq, void *dev_id)
+{
+ struct tsc2301 *tsc = dev_id;
+ struct tsc2301_ts *ts = tsc->ts;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ts->lock, flags);
+ if (ts->irq_enabled) {
+ ts->irq_enabled = 0;
+ disable_irq(ts->irq);
+ ts->pending = 1;
+ ts->pressure_limit = ts->touch_pressure;
+ ts->sample_cnt = 0;
+ mod_timer(&ts->timer,
+ jiffies + msecs_to_jiffies(TSC2301_TS_SCAN_TIME));
+ }
+ spin_unlock_irqrestore(&ts->lock, flags);
+
+ return IRQ_HANDLED;
+}
+
+/* Must be called with ts->lock held */
+static void tsc2301_ts_disable(struct tsc2301 *tsc)
+{
+ struct tsc2301_ts *ts = tsc->ts;
+
+ if (ts->disabled)
+ return;
+
+ ts->disabled = 1;
+ if (!ts->pending) {
+ ts->irq_enabled = 0;
+ disable_irq(ts->irq);
+ } else {
+ while (ts->pending) {
+ spin_unlock_irq(&ts->lock);
+ msleep(1);
+ spin_lock_irq(&ts->lock);
+ }
+ }
+
+ spin_unlock_irq(&ts->lock);
+ tsc2301_ts_stop_scan(tsc);
+ /* Workaround a bug where turning on / off touchscreen scanner
+ * can get the keypad scanner stuck.
+ */
+ tsc2301_kp_restart(tsc);
+ spin_lock_irq(&ts->lock);
+}
+
+static void tsc2301_ts_enable(struct tsc2301 *tsc)
+{
+ struct tsc2301_ts *ts = tsc->ts;
+
+ if (!ts->disabled)
+ return;
+
+ ts->disabled = 0;
+ ts->irq_enabled = 1;
+ enable_irq(ts->irq);
+
+ spin_unlock_irq(&ts->lock);
+ tsc2301_ts_start_scan(tsc);
+ /* Same workaround as above. */
+ tsc2301_kp_restart(tsc);
+ spin_lock_irq(&ts->lock);
+}
+
+#ifdef CONFIG_PM
+int tsc2301_ts_suspend(struct tsc2301 *tsc)
+{
+ struct tsc2301_ts *ts = tsc->ts;
+
+ spin_lock_irq(&ts->lock);
+ tsc2301_ts_disable(tsc);
+ spin_unlock_irq(&ts->lock);
+
+ return 0;
+}
+
+void tsc2301_ts_resume(struct tsc2301 *tsc)
+{
+ struct tsc2301_ts *ts = tsc->ts;
+
+ spin_lock_irq(&ts->lock);
+ tsc2301_ts_enable(tsc);
+ spin_unlock_irq(&ts->lock);
+}
+#endif
+
+static void tsc2301_ts_setup_spi_xfer(struct tsc2301 *tsc)
+{
+ struct tsc2301_ts *ts = tsc->ts;
+ struct spi_message *m = &ts->read_msg;
+ struct spi_transfer *x = &ts->read_xfer[0];
+
+ spi_message_init(m);
+
+ x->tx_buf = &tsc2301_ts_read_data;
+ x->len = 2;
+ spi_message_add_tail(x, m);
+
+ x++;
+ x->rx_buf = &ts->data;
+ x->len = 8;
+ spi_message_add_tail(x, m);
+
+ m->complete = tsc2301_ts_rx;
+ m->context = tsc;
+}
+
+static ssize_t tsc2301_ts_pen_down_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct tsc2301 *tsc = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%u\n", is_pen_down(tsc->ts));
+}
+
+static DEVICE_ATTR(pen_down, S_IRUGO, tsc2301_ts_pen_down_show, NULL);
+
+static ssize_t tsc2301_ts_disable_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct tsc2301 *tsc = dev_get_drvdata(dev);
+ struct tsc2301_ts *ts = tsc->ts;
+
+ return sprintf(buf, "%u\n", ts->disabled);
+}
+
+static ssize_t tsc2301_ts_disable_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct tsc2301 *tsc = dev_get_drvdata(dev);
+ struct tsc2301_ts *ts = tsc->ts;
+ char *endp;
+ int i;
+
+ i = simple_strtoul(buf, &endp, 10);
+ spin_lock_irq(&ts->lock);
+
+ if (i)
+ tsc2301_ts_disable(tsc);
+ else
+ tsc2301_ts_enable(tsc);
+
+ spin_unlock_irq(&ts->lock);
+
+ return count;
+}
+
+static DEVICE_ATTR(disable_ts, 0664, tsc2301_ts_disable_show,
+ tsc2301_ts_disable_store);
+
+int __devinit tsc2301_ts_init(struct tsc2301 *tsc,
+ struct tsc2301_platform_data *pdata)
+{
+ struct tsc2301_ts *ts;
+ struct input_dev *idev;
+ int dav_gpio, r;
+
+ if (pdata->dav_gpio < 0) {
+ dev_err(&tsc->spi->dev, "need DAV GPIO");
+ return -EINVAL;
+ }
+ dav_gpio = pdata->dav_gpio;
+
+ ts = kzalloc(sizeof(*ts), GFP_KERNEL);
+ if (ts == NULL)
+ return -ENOMEM;
+ tsc->ts = ts;
+
+ ts->dav_gpio = dav_gpio;
+#ifdef CONFIG_ARCH_OMAP
+ r = omap_request_gpio(dav_gpio);
+ if (r < 0) {
+ dev_err(&tsc->spi->dev, "unable to get DAV GPIO");
+ goto err1;
+ }
+ omap_set_gpio_direction(dav_gpio, 1);
+ ts->irq = OMAP_GPIO_IRQ(dav_gpio);
+#endif
+ init_timer(&ts->timer);
+ ts->timer.data = (unsigned long) tsc;
+ ts->timer.function = tsc2301_ts_timer;
+
+ spin_lock_init(&ts->lock);
+
+ ts->x_plate_ohm = pdata->ts_x_plate_ohm ? : 280;
+ ts->hw_avg_max = pdata->ts_hw_avg;
+ ts->max_pressure= pdata->ts_max_pressure ? : MAX_12BIT;
+ ts->touch_pressure = pdata->ts_touch_pressure ? : ts->max_pressure;
+ ts->ignore_last = pdata->ts_ignore_last;
+ ts->stab_time = pdata->ts_stab_time;
+
+ if ((r = tsc2301_ts_check_config(ts, &ts->hw_flags))) {
+ dev_err(&tsc->spi->dev, "invalid configuration\n");
+ goto err2;
+ }
+
+ idev = input_allocate_device();
+ if (idev == NULL) {
+ r = -ENOMEM;
+ goto err2;
+ }
+ idev->name = "TSC2301 touchscreen";
+ snprintf(ts->phys, sizeof(ts->phys),
+ "%s/input-ts", tsc->spi->dev.bus_id);
+ idev->phys = ts->phys;
+
+ idev->evbit[0] = BIT(EV_ABS) | BIT(EV_KEY);
+ idev->absbit[0] = BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE);
+ ts->idev = idev;
+
+ tsc2301_ts_setup_spi_xfer(tsc);
+
+ /* These parameters should perhaps be configurable? */
+ input_set_abs_params(idev, ABS_X, 0, 4096, 0, 0);
+ input_set_abs_params(idev, ABS_Y, 0, 4096, 0, 0);
+ input_set_abs_params(idev, ABS_PRESSURE, 0, 1024, 0, 0);
+
+ tsc2301_ts_start_scan(tsc);
+
+ ts->irq_enabled = 1;
+ r = request_irq(ts->irq, tsc2301_ts_irq_handler,
+ SA_SAMPLE_RANDOM | SA_TRIGGER_FALLING,
+ "tsc2301-ts", tsc);
+ if (r < 0) {
+ dev_err(&tsc->spi->dev, "unable to get DAV IRQ");
+ goto err3;
+ }
+ set_irq_wake(ts->irq, 1);
+
+ device_create_file(&tsc->spi->dev, &dev_attr_pen_down);
+ device_create_file(&tsc->spi->dev, &dev_attr_disable_ts);
+
+ r = input_register_device(idev);
+ if (r < 0) {
+ dev_err(&tsc->spi->dev, "can't register touchscreen device\n");
+ goto err4;
+ }
+
+ return 0;
+err4:
+ device_remove_file(&tsc->spi->dev, &dev_attr_disable_ts);
+ device_remove_file(&tsc->spi->dev, &dev_attr_pen_down);
+ free_irq(ts->irq, tsc);
+err3:
+ tsc2301_ts_stop_scan(tsc);
+ input_free_device(idev);
+err2:
+#ifdef CONFIG_ARCH_OMAP
+ omap_free_gpio(dav_gpio);
+#endif
+err1:
+ kfree(ts);
+ return r;
+}
+
+void __devexit tsc2301_ts_exit(struct tsc2301 *tsc)
+{
+ struct tsc2301_ts *ts = tsc->ts;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ts->lock, flags);
+ tsc2301_ts_disable(tsc);
+ spin_unlock_irqrestore(&ts->lock, flags);
+
+ device_remove_file(&tsc->spi->dev, &dev_attr_disable_ts);
+ device_remove_file(&tsc->spi->dev, &dev_attr_pen_down);
+
+ free_irq(ts->irq, tsc);
+ input_unregister_device(ts->idev);
+
+#ifdef CONFIG_ARCH_OMAP
+ omap_free_gpio(ts->dav_gpio);
+#endif
+ kfree(ts);
+}
+MODULE_AUTHOR("Jarkko Oikarinen <jarkko.oikarinen@nokia.com>");
+MODULE_LICENSE("GPL");
#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_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
extern int tsc2301_##module##_init(struct tsc2301 *tsc, \
struct tsc2301_platform_data *pdata); \
extern void tsc2301_##module##_exit(struct tsc2301 *tsc); \
-extern void tsc2301_##module##_prep_for_clk_stop(struct tsc2301 *tsc); \
-extern void tsc2301_##module##_cont_after_clk_stop(struct tsc2301 *tsc);\
extern int tsc2301_##module##_suspend(struct tsc2301 *tsc); \
extern void tsc2301_##module##_resume(struct tsc2301 *tsc);
return 0; \
} \
static inline void tsc2301_##module##_exit(struct tsc2301 *tsc) {} \
-static inline void tsc2301_##module##_prep_for_clk_stop \
- (struct tsc2301 *tsc) {} \
-static inline void tsc2301_##module##_cont_after_clk_stop \
- (struct tsc2301 *tsc) {} \
static inline int tsc2301_##module##_suspend(struct tsc2301 *tsc) \
{ \
return 0; \
#ifdef CONFIG_SPI_TSC2301_KEYPAD
TSC2301_DECL_MOD(kp)
+void tsc2301_kp_restart(struct tsc2301 *tsc);
#else
TSC2301_DECL_EMPTY_MOD(kp)
+void tsc2301_kp_restart(struct tsc2301 *tsc) {}
#endif
#ifdef CONFIG_SPI_TSC2301_TOUCHSCREEN
TSC2301_DECL_EMPTY_MOD(mixer)
#endif
-extern void tsc2301_enable_mclk(struct device *tsc_dev);
-extern void tsc2301_disable_mclk(struct device *tsc_dev);
+extern void tsc2301_mixer_enable_mclk(struct device *tsc_dev);
+extern void tsc2301_mixer_disable_mclk(struct device *tsc_dev);
#endif
projects / linux-2.6-omap-h63xx.git / commitdiff