+++ /dev/null
-From 63e56392b9024aceb610d7b4e1979e2d2cebd217 Mon Sep 17 00:00:00 2001
-From: Marat Radchenko <marat@slonopotamus.org>
-Date: Tue, 18 Oct 2011 21:48:23 +0400
-Subject: [PATCH 1/2] TSC2301 driver (touchscreen and keypad)
-
-This patch adds support for TSC2301 touchscreen/keypad/audio chip found on Nokia N800.
-Touchscreen and keypad are fully functional, audio part only provides power management.
----
- drivers/input/keyboard/Kconfig | 6 +
- drivers/input/keyboard/Makefile | 1 +
- drivers/input/keyboard/tsc2301_kp.c | 475 +++++++++++++++
- drivers/input/touchscreen/Kconfig | 6 +
- drivers/input/touchscreen/Makefile | 1 +
- drivers/input/touchscreen/tsc2301_ts.c | 676 +++++++++++++++++++++
- drivers/spi/Kconfig | 22 +
- drivers/spi/Makefile | 3 +
- drivers/spi/tsc2301-core.c | 297 ++++++++++
- drivers/spi/tsc2301-mixer.c | 1003 ++++++++++++++++++++++++++++++++
- include/linux/spi/tsc2301.h | 208 +++++++
- 11 files changed, 2698 insertions(+), 0 deletions(-)
- create mode 100644 drivers/input/keyboard/tsc2301_kp.c
- create mode 100644 drivers/input/touchscreen/tsc2301_ts.c
- create mode 100644 drivers/spi/tsc2301-core.c
- create mode 100644 drivers/spi/tsc2301-mixer.c
- create mode 100644 include/linux/spi/tsc2301.h
-
---- a/drivers/input/keyboard/Kconfig
-+++ b/drivers/input/keyboard/Kconfig
-@@ -547,6 +547,12 @@ config KEYBOARD_TNETV107X
- To compile this driver as a module, choose M here: the
- module will be called tnetv107x-keypad.
-
-+config KEYBOARD_TSC2301
-+ tristate "TSC2301 keypad support"
-+ depends on SPI_TSC2301
-+ help
-+ Say Y here for if you are using the keypad features of TSC2301.
-+
- config KEYBOARD_TWL4030
- tristate "TI TWL4030/TWL5030/TPS659x0 keypad support"
- depends on TWL4030_CORE
---- a/drivers/input/keyboard/Makefile
-+++ b/drivers/input/keyboard/Makefile
-@@ -49,6 +49,7 @@ obj-$(CONFIG_KEYBOARD_SUNKBD) += sunkbd
- obj-$(CONFIG_KEYBOARD_TC3589X) += tc3589x-keypad.o
- obj-$(CONFIG_KEYBOARD_TEGRA) += tegra-kbc.o
- obj-$(CONFIG_KEYBOARD_TNETV107X) += tnetv107x-keypad.o
-+obj-$(CONFIG_KEYBOARD_TSC2301) += tsc2301_kp.o
- obj-$(CONFIG_KEYBOARD_TWL4030) += twl4030_keypad.o
- obj-$(CONFIG_KEYBOARD_XTKBD) += xtkbd.o
- obj-$(CONFIG_KEYBOARD_W90P910) += w90p910_keypad.o
---- /dev/null
-+++ b/drivers/input/keyboard/tsc2301_kp.c
-@@ -0,0 +1,475 @@
-+/*
-+ * 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>
-+
-+#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_RELEASE_TIMEOUT 50
-+
-+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 data;
-+ u16 mask;
-+
-+ int irq;
-+ s16 keymap[16];
-+};
-+
-+static inline int tsc2301_kp_disabled(struct tsc2301 *tsc)
-+{
-+ return tsc->kp->disable_depth != 0;
-+}
-+
-+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 _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;
-+ struct tsc2301_kp *kp = tsc->kp;
-+ unsigned long flags;
-+
-+ tsc2301_kp_send_key_events(tsc, kp->keys_pressed, 0);
-+ spin_lock_irqsave(&kp->lock, flags);
-+ kp->keys_pressed = 0;
-+ spin_unlock_irqrestore(&kp->lock, flags);
-+}
-+
-+static void tsc2301_kp_rx(void *arg)
-+{
-+ struct tsc2301 *tsc = arg;
-+ struct tsc2301_kp *kp = tsc->kp;
-+ unsigned long flags;
-+ u16 kp_data;
-+
-+ kp_data = kp->data;
-+ dev_dbg(&tsc->spi->dev, "KP data %04x\n", kp_data);
-+
-+ tsc2301_filter_ghost_keys(tsc, kp->keys_pressed, &kp_data);
-+ tsc2301_kp_send_key_events(tsc, kp->keys_pressed, kp_data);
-+ spin_lock_irqsave(&kp->lock, flags);
-+ kp->keys_pressed = kp_data;
-+ 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;
-+ int r;
-+
-+ spin_lock_irqsave(&kp->lock, flags);
-+ if (tsc2301_kp_disabled(tsc)) {
-+ spin_unlock_irqrestore(&kp->lock, flags);
-+ return IRQ_HANDLED;
-+ }
-+ kp->pending = 1;
-+ spin_unlock_irqrestore(&kp->lock, flags);
-+ mod_timer(&kp->timer,
-+ jiffies + msecs_to_jiffies(TSC2301_RELEASE_TIMEOUT));
-+ r = spi_async(tsc->spi, &tsc->kp->read_msg);
-+ if (r)
-+ dev_err(&tsc->spi->dev, "kp: spi_async() failed");
-+ 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);
-+}
-+
-+/* 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;
-+ }
-+ spin_unlock_irqrestore(&kp->lock, flags);
-+
-+ irq_set_irq_type(kp->irq, IRQ_TYPE_EDGE_FALLING);
-+ tsc2301_kp_start_scan(tsc);
-+ 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;
-+ }
-+ disable_irq_nosync(kp->irq);
-+ irq_set_irq_type(kp->irq, IRQ_TYPE_NONE);
-+ spin_unlock_irqrestore(&kp->lock, flags);
-+
-+ while (kp->pending) {
-+ msleep(1);
-+ }
-+
-+ tsc2301_kp_stop_scan(tsc);
-+out:
-+ if (!release_keys)
-+ del_timer(&kp->timer); /* let timeout release keys */
-+
-+ 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)
-+{
-+ if (!tsc2301_kp_disabled(tsc)) {
-+ tsc2301_kp_start_scan(tsc);
-+ }
-+}
-+
-+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 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);
-+
-+ 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;
-+
-+ idev = input_allocate_device();
-+ if (idev == NULL) {
-+ r = -ENOMEM;
-+ goto err1;
-+ }
-+ if (pdata->keyb_name)
-+ idev->name = pdata->keyb_name;
-+ else
-+ idev->name = "TSC2301 keypad";
-+ snprintf(kp->phys, sizeof(kp->phys), "%s/input-kp", dev_name(&tsc->spi->dev));
-+ 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;
-+
-+ irq_set_irq_type(kp->irq, IRQ_TYPE_EDGE_FALLING);
-+
-+ r = request_irq(kp->irq, tsc2301_kp_irq_handler, 0,
-+ "tsc2301-kp", tsc);
-+ if (r < 0) {
-+ dev_err(&tsc->spi->dev, "unable to get kbirq IRQ");
-+ goto err3;
-+ }
-+ irq_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);
-+}
---- a/drivers/input/touchscreen/Kconfig
-+++ b/drivers/input/touchscreen/Kconfig
-@@ -726,6 +726,12 @@ config TOUCHSCREEN_TSC2007
- To compile this driver as a module, choose M here: the
- module will be called tsc2007.
-
-+config TOUCHSCREEN_TSC2301
-+ tristate "TSC2301 touchscreen support"
-+ depends on SPI_TSC2301
-+ help
-+ Say Y here for if you are using the touchscreen features of TSC2301.
-+
- config TOUCHSCREEN_W90X900
- tristate "W90P910 touchscreen driver"
- depends on HAVE_CLK
---- a/drivers/input/touchscreen/Makefile
-+++ b/drivers/input/touchscreen/Makefile
-@@ -52,6 +52,7 @@ obj-$(CONFIG_TOUCHSCREEN_TOUCHWIN) += to
- obj-$(CONFIG_TOUCHSCREEN_TSC_SERIO) += tsc40.o
- obj-$(CONFIG_TOUCHSCREEN_TSC2005) += tsc2005.o
- obj-$(CONFIG_TOUCHSCREEN_TSC2007) += tsc2007.o
-+obj-$(CONFIG_TOUCHSCREEN_TSC2301) += tsc2301_ts.o
- obj-$(CONFIG_TOUCHSCREEN_UCB1400) += ucb1400_ts.o
- obj-$(CONFIG_TOUCHSCREEN_WACOM_W8001) += wacom_w8001.o
- obj-$(CONFIG_TOUCHSCREEN_WM831X) += wm831x-ts.o
---- /dev/null
-+++ b/drivers/input/touchscreen/tsc2301_ts.c
-@@ -0,0 +1,676 @@
-+/*
-+ * TSC2301 touchscreen driver
-+ *
-+ * Copyright (C) 2005-2008 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>
-+
-+#include <linux/spi/tsc2301.h>
-+
-+/**
-+ * The touchscreen interface operates as follows:
-+ *
-+ * Initialize:
-+ * Request access to GPIO103 (DAV)
-+ * tsc2301_ts_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_ts_irq_handler is called
-+ * 5) tsc2301_ts_irq_handler queues up an spi transfer to fetch
-+ * the x, y, z1, z2 values
-+ * 6) SPI framework calls tsc2301_ts_rx after the coordinates are read
-+ * 7) When the penup_timer expires, there have not been DAV interrupts
-+ * during the last 20ms which means the pen has been lifted.
-+ */
-+
-+
-+#define TSC2301_TOUCHSCREEN_PRODUCT_ID 0x0052
-+#define TSC2301_TOUCHSCREEN_PRODUCT_VERSION 0x0001
-+
-+#define TSC2301_TS_PENUP_TIME 20
-+
-+#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)
-+
-+#define TS_RECT_SIZE 8
-+#define TSF_MIN_Z1 100
-+#define TSF_MAX_Z2 4000
-+
-+#define TSF_SAMPLES 4
-+
-+struct ts_filter {
-+ int sample_cnt;
-+
-+ int avg_x;
-+ int avg_y;
-+ int avg_z1;
-+ int avg_z2;
-+};
-+
-+struct ts_coords {
-+ u16 x;
-+ u16 y;
-+ u16 z1;
-+ u16 z2;
-+};
-+
-+struct tsc2301_ts {
-+ struct input_dev *idev;
-+ char phys[32];
-+ struct timer_list penup_timer;
-+ struct mutex mutex;
-+
-+ struct spi_transfer read_xfer[2];
-+ struct spi_message read_msg;
-+ struct ts_coords *coords;
-+
-+ struct ts_filter filter;
-+
-+ int hw_avg_max;
-+ u16 x;
-+ u16 y;
-+ u16 p;
-+
-+ u16 x_plate_ohm;
-+ int stab_time;
-+ int max_pressure;
-+ int touch_pressure;
-+
-+ u8 event_sent;
-+ u8 pen_down;
-+ u8 disabled;
-+ u8 disable_depth;
-+
-+ int hw_flags;
-+ 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[5];
-+ struct spi_transfer *x;
-+ struct spi_message m;
-+ int i;
-+ u16 val1, val2, val3;
-+ u16 data[10];
-+
-+ 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_2MHZ |
-+ flags;
-+
-+ /* Now we prepare the command for transferring */
-+ data[0] = TSC2301_REG_ADC;
-+ data[1] = val1;
-+ data[2] = TSC2301_REG_ADC;
-+ data[3] = val2;
-+ data[4] = TSC2301_REG_ADC;
-+ data[5] = val3;
-+ data[6] = TSC2301_REG_REF;
-+ data[7] = 1 << 4 | 1 << 2 | 1; /* intref, 100uS settl, 2.5V ref */
-+ data[8] = TSC2301_REG_CONFIG;
-+ data[9] = 3 << 3 | 2 << 0; /* 340uS pre-chrg, 544us delay */
-+
-+ spi_message_init(&m);
-+ m.spi = tsc->spi;
-+
-+ memset(xfer, 0, sizeof(xfer));
-+ x = &xfer[0];
-+
-+ for (i = 0; i < 10; i += 2) {
-+ x->tx_buf = &data[i];
-+ x->len = 4;
-+ if (i != 8)
-+ x->cs_change = 1;
-+ spi_message_add_tail(x, &m);
-+ x++;
-+ }
-+ spi_sync(m.spi, &m);
-+
-+ return 0;
-+}
-+
-+static void tsc2301_ts_start_scan(struct tsc2301 *tsc)
-+{
-+ tsc2301_ts_configure(tsc, tsc->ts->hw_flags);
-+ tsc2301_kp_restart(tsc);
-+}
-+
-+static void tsc2301_ts_stop_scan(struct tsc2301 *tsc)
-+{
-+ tsc2301_write_reg(tsc, TSC2301_REG_ADC, TSC2301_ADCREG_STOP_CONVERSION);
-+ tsc2301_kp_restart(tsc);
-+}
-+
-+static void update_pen_state(struct tsc2301_ts *ts, int x, int y, int pressure)
-+{
-+ 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);
-+ ts->pen_down = 1;
-+ } else {
-+ input_report_abs(ts->idev, ABS_PRESSURE, 0);
-+ if (ts->pen_down)
-+ input_report_key(ts->idev, BTN_TOUCH, 0);
-+ ts->pen_down = 0;
-+ }
-+
-+ input_sync(ts->idev);
-+
-+#ifdef VERBOSE
-+ dev_dbg(&tsc->spi->dev, "x %4d y %4d p %4d\n", x, y, pressure);
-+#endif
-+}
-+
-+static int filter(struct tsc2301_ts *ts, int x, int y, int z1, int z2)
-+{
-+ int inside_rect, pressure_limit, Rt;
-+ struct ts_filter *tsf = &ts->filter;
-+
-+ /* validate pressure and position */
-+ if (x > MAX_12BIT || y > MAX_12BIT)
-+ return 0;
-+
-+ /* skip coords if the pressure-components are out of range */
-+ if (z1 < TSF_MIN_Z1 || z2 > TSF_MAX_Z2)
-+ return 0;
-+
-+ /* Use the x,y,z1,z2 directly on the first "pen down" event */
-+ if (ts->event_sent) {
-+ tsf->avg_x += x;
-+ tsf->avg_y += y;
-+ tsf->avg_z1 += z1;
-+ tsf->avg_z2 += z2;
-+
-+ if (++tsf->sample_cnt < TSF_SAMPLES)
-+ return 0;
-+ x = tsf->avg_x / TSF_SAMPLES;
-+ y = tsf->avg_y / TSF_SAMPLES;
-+ z1 = tsf->avg_z1 / TSF_SAMPLES;
-+ z2 = tsf->avg_z2 / TSF_SAMPLES;
-+ }
-+ tsf->sample_cnt = 0;
-+ tsf->avg_x = 0;
-+ tsf->avg_y = 0;
-+ tsf->avg_z1 = 0;
-+ tsf->avg_z2 = 0;
-+
-+ pressure_limit = ts->event_sent? ts->max_pressure: ts->touch_pressure;
-+
-+ /* z1 is always at least 100: */
-+ Rt = x * (z2 - z1) / z1;
-+ Rt = Rt * ts->x_plate_ohm / 4096;
-+ if (Rt > pressure_limit)
-+ return 0;
-+
-+ /* discard the event if it still is within the previous rect - unless
-+ * if the pressure is harder, but then use previous x,y position */
-+ inside_rect = (
-+ x > (int)ts->x - TS_RECT_SIZE && x < (int)ts->x + TS_RECT_SIZE &&
-+ y > (int)ts->y - TS_RECT_SIZE && y < (int)ts->y + TS_RECT_SIZE);
-+
-+ if (!ts->event_sent || !inside_rect) {
-+ ts->x = x;
-+ ts->y = y;
-+ ts->p = Rt;
-+ return 1;
-+ } else if (Rt < ts->p) {
-+ ts->p = Rt;
-+ return 1;
-+ }
-+ return 0;
-+}
-+
-+/*
-+ * 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;
-+ int send_event;
-+ int x, y, z1, z2;
-+
-+ x = ts->coords->x;
-+ y = ts->coords->y;
-+ z1 = ts->coords->z1;
-+ z2 = ts->coords->z2;
-+
-+ send_event = filter(ts, x, y, z1, z2);
-+ if (send_event) {
-+ update_pen_state(ts, ts->x, ts->y, ts->p);
-+ ts->event_sent = 1;
-+ }
-+
-+ mod_timer(&ts->penup_timer,
-+ jiffies + msecs_to_jiffies(TSC2301_TS_PENUP_TIME));
-+}
-+
-+/*
-+ * Timer is called TSC2301_TS_PENUP_TIME after pen is up
-+ */
-+static void tsc2301_ts_timer_handler(unsigned long data)
-+{
-+ struct tsc2301 *tsc = (struct tsc2301 *)data;
-+ struct tsc2301_ts *ts = tsc->ts;
-+
-+ if (ts->event_sent) {
-+ ts->event_sent = 0;
-+ update_pen_state(ts, 0, 0, 0);
-+ }
-+}
-+
-+/*
-+ * This interrupt is called when pen is down and coordinates are
-+ * available. That is indicated by a falling edge on DEV line.
-+ */
-+static irqreturn_t tsc2301_ts_irq_handler(int irq, void *dev_id)
-+{
-+ struct tsc2301 *tsc = dev_id;
-+ struct tsc2301_ts *ts = tsc->ts;
-+ int r;
-+
-+ r = spi_async(tsc->spi, &ts->read_msg);
-+ if (r)
-+ dev_err(&tsc->spi->dev, "ts: spi_async() failed");
-+
-+ mod_timer(&ts->penup_timer,
-+ jiffies + msecs_to_jiffies(TSC2301_TS_PENUP_TIME));
-+
-+ return IRQ_HANDLED;
-+}
-+
-+static void tsc2301_ts_disable(struct tsc2301 *tsc)
-+{
-+ struct tsc2301_ts *ts = tsc->ts;
-+
-+ if (ts->disable_depth++ != 0)
-+ return;
-+
-+ disable_irq(ts->irq);
-+
-+ /* wait until penup timer expire normally */
-+ do {
-+ msleep(1);
-+ } while (ts->event_sent);
-+
-+ tsc2301_ts_stop_scan(tsc);
-+}
-+
-+static void tsc2301_ts_enable(struct tsc2301 *tsc)
-+{
-+ struct tsc2301_ts *ts = tsc->ts;
-+
-+ if (--ts->disable_depth != 0)
-+ return;
-+
-+ enable_irq(ts->irq);
-+
-+ tsc2301_ts_start_scan(tsc);
-+}
-+
-+#ifdef CONFIG_PM
-+int tsc2301_ts_suspend(struct tsc2301 *tsc)
-+{
-+ struct tsc2301_ts *ts = tsc->ts;
-+
-+ mutex_lock(&ts->mutex);
-+ tsc2301_ts_disable(tsc);
-+ mutex_unlock(&ts->mutex);
-+
-+ return 0;
-+}
-+
-+void tsc2301_ts_resume(struct tsc2301 *tsc)
-+{
-+ struct tsc2301_ts *ts = tsc->ts;
-+
-+ mutex_lock(&ts->mutex);
-+ tsc2301_ts_enable(tsc);
-+ mutex_unlock(&ts->mutex);
-+}
-+#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->coords;
-+ 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", tsc->ts->pen_down);
-+}
-+
-+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);
-+ i = i ? 1 : 0;
-+ mutex_lock(&ts->mutex);
-+ if (i == ts->disabled) goto out;
-+ ts->disabled = i;
-+
-+ if (i)
-+ tsc2301_ts_disable(tsc);
-+ else
-+ tsc2301_ts_enable(tsc);
-+out:
-+ mutex_unlock(&ts->mutex);
-+ 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 r;
-+ int x_max, y_max;
-+ int x_fudge, y_fudge, p_fudge;
-+
-+ if (pdata->dav_int <= 0) {
-+ dev_err(&tsc->spi->dev, "need DAV IRQ");
-+ return -EINVAL;
-+ }
-+
-+ ts = kzalloc(sizeof(*ts), GFP_KERNEL);
-+ if (ts == NULL)
-+ return -ENOMEM;
-+ tsc->ts = ts;
-+
-+ ts->coords = kzalloc(sizeof(*ts->coords), GFP_KERNEL);
-+ if (ts->coords == NULL) {
-+ kfree(ts);
-+ return -ENOMEM;
-+ }
-+
-+ ts->irq = pdata->dav_int;
-+
-+ init_timer(&ts->penup_timer);
-+ setup_timer(&ts->penup_timer, tsc2301_ts_timer_handler,
-+ (unsigned long)tsc);
-+
-+ mutex_init(&ts->mutex);
-+
-+ 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->stab_time = pdata->ts_stab_time;
-+
-+ x_max = pdata->ts_x_max ? : 4096;
-+ y_max = pdata->ts_y_max ? : 4096;
-+ x_fudge = pdata->ts_x_fudge ? : 4;
-+ y_fudge = pdata->ts_y_fudge ? : 8;
-+ p_fudge = pdata->ts_pressure_fudge ? : 2;
-+
-+ 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", dev_name(&tsc->spi->dev));
-+ idev->phys = ts->phys;
-+ idev->dev.parent = &tsc->spi->dev;
-+
-+ 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, x_max, x_fudge, 0);
-+ input_set_abs_params(idev, ABS_Y, 0, y_max, y_fudge, 0);
-+ input_set_abs_params(idev, ABS_PRESSURE, 0, ts->max_pressure,
-+ p_fudge, 0);
-+
-+ tsc2301_ts_start_scan(tsc);
-+
-+ r = request_irq(ts->irq, tsc2301_ts_irq_handler,
-+ IRQF_TRIGGER_FALLING,
-+ "tsc2301-ts", tsc);
-+ if (r < 0) {
-+ dev_err(&tsc->spi->dev, "unable to get DAV IRQ");
-+ goto err3;
-+ }
-+ irq_set_irq_wake(ts->irq, 1);
-+
-+ if (device_create_file(&tsc->spi->dev, &dev_attr_pen_down) < 0)
-+ goto err4;
-+ if (device_create_file(&tsc->spi->dev, &dev_attr_disable_ts) < 0)
-+ goto err5;
-+
-+ r = input_register_device(idev);
-+ if (r < 0) {
-+ dev_err(&tsc->spi->dev, "can't register touchscreen device\n");
-+ goto err6;
-+ }
-+
-+ return 0;
-+err6:
-+ device_remove_file(&tsc->spi->dev, &dev_attr_disable_ts);
-+err5:
-+ device_remove_file(&tsc->spi->dev, &dev_attr_pen_down);
-+err4:
-+ free_irq(ts->irq, tsc);
-+err3:
-+ tsc2301_ts_stop_scan(tsc);
-+ input_free_device(idev);
-+err2:
-+ kfree(ts->coords);
-+ kfree(ts);
-+ return r;
-+}
-+
-+void __devexit tsc2301_ts_exit(struct tsc2301 *tsc)
-+{
-+ struct tsc2301_ts *ts = tsc->ts;
-+
-+ tsc2301_ts_disable(tsc);
-+
-+ 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);
-+
-+ kfree(ts->coords);
-+ kfree(ts);
-+}
-+MODULE_AUTHOR("Jarkko Oikarinen <jarkko.oikarinen@nokia.com>");
-+MODULE_LICENSE("GPL");
---- a/drivers/spi/Kconfig
-+++ b/drivers/spi/Kconfig
-@@ -433,6 +433,28 @@ config SPI_TLE62X0
- sysfs interface, with each line presented as a kind of GPIO
- exposing both switch control and diagnostic feedback.
-
-+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.
-+
- #
- # Add new SPI protocol masters in alphabetical order above this line
- #
---- a/drivers/spi/Makefile
-+++ b/drivers/spi/Makefile
-@@ -59,4 +59,6 @@ obj-$(CONFIG_SPI_TLE62X0) += spi-tle62x
- obj-$(CONFIG_SPI_TOPCLIFF_PCH) += spi-topcliff-pch.o
- obj-$(CONFIG_SPI_TXX9) += spi-txx9.o
- obj-$(CONFIG_SPI_XILINX) += spi-xilinx.o
--
-+obj-$(CONFIG_SPI_TSC2301) += tsc2301.o
-+tsc2301-objs := tsc2301-core.o
-+tsc2301-$(CONFIG_SPI_TSC2301_AUDIO) += tsc2301-mixer.o
---- /dev/null
-+++ b/drivers/spi/tsc2301-core.c
-@@ -0,0 +1,297 @@
-+/*
-+ * 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/gpio.h>
-+#include <linux/spi/spi.h>
-+#include <linux/spi/tsc2301.h>
-+
-+u16 tsc2301_read_reg(struct tsc2301 *tsc, int reg)
-+{
-+ struct spi_transfer t[2];
-+ struct spi_message m;
-+ u16 data = 0, cmd;
-+
-+ cmd = reg;
-+ cmd |= 0x8000;
-+
-+ memset(t, 0, sizeof(t));
-+ spi_message_init(&m);
-+ m.spi = tsc->spi;
-+
-+ t[0].tx_buf = &cmd;
-+ t[0].rx_buf = NULL;
-+ t[0].len = 2;
-+ spi_message_add_tail(&t[0], &m);
-+
-+ t[1].tx_buf = NULL;
-+ t[1].rx_buf = &data;
-+ t[1].len = 2;
-+ spi_message_add_tail(&t[1], &m);
-+
-+ spi_sync(m.spi, &m);
-+
-+ return data;
-+}
-+
-+void tsc2301_write_reg(struct tsc2301 *tsc, int reg, u16 val)
-+{
-+ struct spi_transfer t;
-+ struct spi_message m;
-+ u16 data[2];
-+
-+ /* Now we prepare the command for transferring */
-+ data[0] = reg;
-+ data[1] = val;
-+
-+ spi_message_init(&m);
-+ m.spi = tsc->spi;
-+
-+ memset(&t, 0, sizeof(t));
-+ t.tx_buf = data;
-+ t.rx_buf = NULL;
-+ t.len = 4;
-+ spi_message_add_tail(&t, &m);
-+
-+ spi_sync(m.spi, &m);
-+}
-+
-+void tsc2301_write_kbc(struct tsc2301 *tsc, int val)
-+{
-+ u16 w;
-+
-+ w = tsc->config2_shadow;
-+ w &= ~(0x03 << 14);
-+ w |= (val & 0x03) << 14;
-+ tsc2301_write_reg(tsc, TSC2301_REG_CONFIG2, w);
-+ tsc->config2_shadow = w;
-+}
-+
-+void tsc2301_write_pll(struct tsc2301 *tsc,
-+ int pll_n, int pll_a, int pll_pdc, int pct_e, int pll_o)
-+{
-+ u16 w;
-+
-+ w = tsc->config2_shadow;
-+ w &= ~0x3fff;
-+ w |= (pll_n & 0x0f) | ((pll_a & 0x0f) << 4) | ((pll_pdc & 0x0f) << 8);
-+ w |= pct_e ? (1 << 12) : 0;
-+ w |= pll_o ? (1 << 13) : 0;
-+ tsc2301_write_reg(tsc, TSC2301_REG_CONFIG2, w);
-+ tsc->config2_shadow = w;
-+}
-+
-+void tsc2301_read_buf(struct tsc2301 *tsc, int reg, u16 *rx_buf, int len)
-+{
-+ struct spi_transfer t[2];
-+ struct spi_message m;
-+ u16 cmd, i;
-+
-+ cmd = reg;
-+ cmd |= 0x8000;
-+
-+ spi_message_init(&m);
-+ m.spi = tsc->spi;
-+
-+ memset(t, 0, sizeof(t));
-+ t[0].tx_buf = &cmd;
-+ t[0].rx_buf = NULL;
-+ t[0].len = 2;
-+ spi_message_add_tail(&t[0], &m);
-+
-+ t[1].tx_buf = NULL;
-+ t[1].rx_buf = rx_buf;
-+ t[1].len = 2 * len;
-+ spi_message_add_tail(&t[1], &m);
-+
-+ spi_sync(m.spi, &m);
-+
-+ for (i = 0; i < len; i++)
-+ printk(KERN_DEBUG "rx_buf[%d]: %04x\n", i, rx_buf[i]);
-+}
-+
-+static int __devinit tsc2301_probe(struct spi_device *spi)
-+{
-+ struct tsc2301 *tsc;
-+ struct tsc2301_platform_data *pdata = spi->dev.platform_data;
-+ int r;
-+ u16 w;
-+
-+ if (!pdata) {
-+ dev_dbg(&spi->dev, "no platform data?\n");
-+ return -ENODEV;
-+ }
-+
-+ tsc = kzalloc(sizeof(*tsc), GFP_KERNEL);
-+ if (tsc == NULL)
-+ return -ENOMEM;
-+
-+ dev_set_drvdata(&spi->dev, tsc);
-+ tsc->spi = spi;
-+
-+ tsc->enable_clock = pdata->enable_clock;
-+ tsc->disable_clock = pdata->disable_clock;
-+
-+ if (pdata->reset_gpio >= 0) {
-+ tsc->reset_gpio = pdata->reset_gpio;
-+ r = gpio_request(tsc->reset_gpio, "TSC2301 reset");
-+ if (r < 0)
-+ goto err1;
-+ gpio_direction_output(tsc->reset_gpio, 1);
-+ mdelay(1);
-+ gpio_set_value(tsc->reset_gpio, 0);
-+ } else
-+ tsc->reset_gpio = -1;
-+
-+ spi->mode = SPI_MODE_1;
-+ spi->bits_per_word = 16;
-+ /* The max speed might've been defined by the board-specific
-+ * struct */
-+ if (!spi->max_speed_hz)
-+ spi->max_speed_hz = TSC2301_HZ;
-+ spi_setup(spi);
-+
-+ /* Soft reset */
-+ tsc2301_write_reg(tsc, TSC2301_REG_RESET, 0xbb00);
-+ msleep(1);
-+
-+ w = tsc2301_read_reg(tsc, TSC2301_REG_ADC);
-+ if (!(w & (1 << 14))) {
-+ dev_err(&spi->dev, "invalid ADC reg value: %04x\n", w);
-+ r = -ENODEV;
-+ goto err1;
-+ }
-+
-+ w = tsc2301_read_reg(tsc, TSC2301_REG_DAC);
-+ if (!(w & (1 << 15))) {
-+ dev_err(&spi->dev, "invalid DAC reg value: %04x\n", w);
-+ r = -ENODEV;
-+ goto err1;
-+ }
-+
-+ /* Stop keypad scanning */
-+ tsc2301_write_reg(tsc, TSC2301_REG_KEY, 0x4000);
-+
-+ /* We have to cache this for read-modify-write, since we can't
-+ * read back BIT15 */
-+ w = tsc2301_read_reg(tsc, TSC2301_REG_CONFIG2);
-+ /* By default BIT15 is set */
-+ w |= 1 << 15;
-+ tsc->config2_shadow = w;
-+
-+ r = tsc2301_kp_init(tsc, pdata);
-+ if (r)
-+ goto err1;
-+ r = tsc2301_ts_init(tsc, pdata);
-+ if (r)
-+ goto err2;
-+ r = tsc2301_mixer_init(tsc, pdata);
-+ if (r)
-+ goto err3;
-+ return 0;
-+
-+err3:
-+ tsc2301_ts_exit(tsc);
-+err2:
-+ tsc2301_kp_exit(tsc);
-+err1:
-+ kfree(tsc);
-+ return r;
-+}
-+
-+static int __devexit tsc2301_remove(struct spi_device *spi)
-+{
-+ struct tsc2301 *tsc = dev_get_drvdata(&spi->dev);
-+
-+ tsc2301_mixer_exit(tsc);
-+ tsc2301_ts_exit(tsc);
-+ tsc2301_kp_exit(tsc);
-+ if (tsc->reset_gpio >= 0)
-+ gpio_free(tsc->reset_gpio);
-+ 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
-+++ b/drivers/spi/tsc2301-mixer.c
-@@ -0,0 +1,1003 @@
-+/*
-+ * 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/core.h>
-+#include <sound/control.h>
-+
-+/* shadow register indexes */
-+enum {
-+ /* audio control and volume registers */
-+ AUDCNTL_INDEX,
-+ ADCVOL_INDEX,
-+ DACVOL_INDEX,
-+ BPVOL_INDEX,
-+ /* keyclick control register (not needed here) */
-+ /* audio power control register */
-+ PD_MISC_INDEX,
-+ /* TSC2301 GPIO control register */
-+ GPIO_INDEX,
-+
-+ SHADOW_REG_COUNT,
-+};
-+
-+/* structure for driver private data */
-+struct tsc2301_mixer {
-+ struct tsc2301 *tsc;
-+ struct mutex mutex;
-+
-+ /* shadow registers holding TSC2301 audio registers. Used to hold
-+ * their states during the sleep and also to reduce communication with
-+ * the chip since get callback functions could get register values
-+ * directly from these shadow registers without needing to read them
-+ * from the chip */
-+ u16 shadow_regs[SHADOW_REG_COUNT];
-+
-+ /* audio controller driver usage of the ADC and DAC */
-+ unsigned adc_enabled:1, dac_enabled:1;
-+ unsigned pll_output:1;
-+ unsigned mclk_enabled;
-+
-+ /* latest audio power-up timestamp */
-+ unsigned long pu_jiffies;
-+
-+ /* these are used when upper layer(s) are going to power-down TSC2301
-+ * before 100 msec is passed from power-up */
-+ struct delayed_work delayed_power_down;
-+ unsigned delayed_pd_active:1;
-+
-+ int (* platform_init)(struct device *);
-+ void (* platform_cleanup)(struct device *);
-+
-+ struct tsc2301_mixer_gpio *mixer_gpios;
-+ int n_mixer_gpios;
-+};
-+
-+#define TSC2301_DAC_DELAY msecs_to_jiffies(100)
-+#define TSC2301_MIN_PU_PERIOD msecs_to_jiffies(100)
-+
-+#define TSC2301_REG_TO_PVAL(reg) \
-+ (TSC2301_REG_TO_PAGE(reg) << 6 | TSC2301_REG_TO_ADDR(reg))
-+#define TSC2301_PVAL_TO_REG(v) \
-+ (TSC2301_REG((((v) >> 6) & 3),((v) & 0x1f)))
-+
-+#define TSC2301_VOLUME_MASK 0x7f
-+#define TSC2301_MIN_ADCVOL 6
-+#define TSC2301_MIN_DACVOL 0
-+#define TSC2301_MIN_BPVOL 31
-+#define TSC2301_MUTE_LEFT_SHIFT 15
-+#define TSC2301_VOL_LEFT_SHIFT 8
-+#define TSC2301_MUTE_RIGHT_SHIFT 7
-+#define TSC2301_VOL_RIGHT_SHIFT 0
-+
-+#define TSC2301_INM_MASK 3
-+#define TSC2301_INML_SHIFT 12
-+#define TSC2301_INMR_SHIFT 10
-+
-+#define TSC2301_MICG_MASK 3
-+#define TSC2301_MICG_MIN 1 /* values 0 & 1 both mean 0 dB */
-+#define TSC2301_MICG_SHIFT 8
-+
-+#define TSC2301_REG_AUDCNTL_MCLK(v) (((v) & 3) << 6)
-+#define TSC2301_REG_AUDCNTL_I2SFS(v) (((v) & 0xf) << 2)
-+#define TSC2301_REG_AUDCNTL_I2SFM(v) (((v) & 3) << 0)
-+
-+#define TSC2301_SINGLE(xname, xindex, reg, shadow_index, shift, mask, min) \
-+{\
-+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
-+ .name = xname, \
-+ .index = xindex, \
-+ .info = snd_tsc2301_info_single, \
-+ .get = snd_tsc2301_get_single, \
-+ .put = snd_tsc2301_put_single, \
-+ .private_value = TSC2301_REG_TO_PVAL(reg) | \
-+ (shadow_index << 8) | (shift << 16) | (mask << 24) | \
-+ (min << 28) \
-+}
-+#define TSC2301_SINGLE_MINVAL(v) (((v) >> 28) & 15)
-+#define TSC2301_SINGLE_SHIFT(v) (((v) >> 16) & 15)
-+#define TSC2301_SINGLE_MASK(v) (((v) >> 24) & 15)
-+
-+#define TSC2301_DOUBLE(xname, xindex, reg, shadow_index, ls, rs, mask, min) \
-+{\
-+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
-+ .name = xname, \
-+ .index = xindex, \
-+ .info = snd_tsc2301_info_double, \
-+ .get = snd_tsc2301_get_double, \
-+ .put = snd_tsc2301_put_double, \
-+ .private_value = TSC2301_REG_TO_PVAL(reg) | \
-+ (shadow_index << 8) | (min << 11) | \
-+ (ls << 16) | (rs << 20) | (mask << 24) \
-+}
-+#define TSC2301_DOUBLE_MINVAL(v) (((v) >> 11) & 0x1f)
-+#define TSC2301_DOUBLE_LEFT_SHIFT(v) (((v) >> 16) & 15)
-+#define TSC2301_DOUBLE_RIGHT_SHIFT(v) (((v) >> 20) & 15)
-+#define TSC2301_DOUBLE_MASK(v) (((v) >> 24) & TSC2301_VOLUME_MASK)
-+
-+#define TSC2301_MUX(xname, xindex, reg, shadow_index, ls, rs, mask) \
-+{\
-+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
-+ .name = xname, \
-+ .index = xindex, \
-+ .info = snd_tsc2301_info_mux, \
-+ .get = snd_tsc2301_get_mux, \
-+ .put = snd_tsc2301_put_mux, \
-+ .private_value = TSC2301_REG_TO_PVAL(reg) | \
-+ (shadow_index << 8) | (ls << 16) | (rs << 20) | (mask << 24) \
-+}
-+#define TSC2301_MUX_LEFT_SHIFT(v) (((v) >> 16) & 15)
-+#define TSC2301_MUX_RIGHT_SHIFT(v) (((v) >> 20) & 15)
-+#define TSC2301_MUX_MASK(v) (((v) >> 24) & TSC2301_VOLUME_MASK)
-+
-+#define TSC2301_BOOL(xname, xindex, reg, shadow_index, shift, invert, state) \
-+{ \
-+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
-+ .name = xname, \
-+ .index = xindex, \
-+ .info = snd_tsc2301_info_bool, \
-+ .get = snd_tsc2301_get_bool, \
-+ .put = snd_tsc2301_put_bool, \
-+ .private_value = TSC2301_REG_TO_PVAL(reg) | \
-+ (shadow_index << 8) | (shift << 16) | \
-+ (invert << 24) | (state << 25) \
-+}
-+#define TSC2301_BOOL_SHIFT(v) (((v) >> 16) & 7)
-+#define TSC2301_BOOL_INVERT(v) (((v) >> 24) & 1)
-+#define TSC2301_BOOL_STATE(v) (((v) >> 25) & 1)
-+
-+#define TSC2301_SHADOW_INDEX(v) (((v) >> 8) & 7)
-+
-+/*
-+ * Power-down handler for additional GPIO mixer controls. GPIO state of GPIO
-+ * controls whose power-down flag is enabled are set to their false/deactivate
-+ * state
-+ *
-+ * Must be called tsc->mixer->mutex locked
-+ */
-+static void tsc2301_gpio_power_down(struct tsc2301 *tsc)
-+{
-+ struct tsc2301_mixer *mix = tsc->mixer;
-+ u16 temp;
-+ int i;
-+
-+ temp = mix->shadow_regs[GPIO_INDEX];
-+ for (i = 0; i < mix->n_mixer_gpios; i++) {
-+ const struct tsc2301_mixer_gpio *mg;
-+
-+ mg = mix->mixer_gpios + i;
-+ if (mg->deactivate_on_pd) {
-+ int gpio = mg->gpio;
-+
-+ temp &= ~(1 << gpio);
-+ temp |= mg->inverted << gpio;
-+ }
-+ }
-+ tsc2301_write_reg(tsc, TSC2301_REG_GPIO, temp);
-+}
-+
-+/*
-+ * Powers down/up audio blocks which are muted or become unused.
-+ * shadow_index >= 0, changes power state of single audio block
-+ * shadow_index < 0, changes power state of all blocks
-+ *
-+ * Must be called tsc->mixer->mutex locked
-+ */
-+#define TSC2301_MUTE_MASK \
-+ ((1 << TSC2301_MUTE_LEFT_SHIFT) | (1 << TSC2301_MUTE_RIGHT_SHIFT))
-+static void tsc2301_power_ctrl(struct tsc2301 *tsc, int shadow_index,
-+ int poll_pdsts)
-+{
-+ struct tsc2301_mixer *mix = tsc->mixer;
-+ u16 pd_ctrl, pd_ctrl_old, w;
-+ unsigned long timeout;
-+ int power_up = 0;
-+
-+ if (mix->delayed_pd_active) {
-+ mix->delayed_pd_active = 0;
-+ mix->mclk_enabled--;
-+ cancel_delayed_work(&mix->delayed_power_down);
-+ }
-+
-+ pd_ctrl = pd_ctrl_old = mix->shadow_regs[PD_MISC_INDEX];
-+ /* power control helper based on used space mixer selections. See
-+ * actual power control decisions below */
-+ if (shadow_index < 0 || shadow_index == ADCVOL_INDEX) {
-+ /* ADC left and right power down control */
-+ if (mix->shadow_regs[ADCVOL_INDEX] &
-+ (1 << TSC2301_MUTE_LEFT_SHIFT))
-+ /* left ADC muted. Power down the left ADC */
-+ pd_ctrl |= TSC2301_REG_PD_MISC_ADPDL;
-+ else
-+ pd_ctrl &= ~TSC2301_REG_PD_MISC_ADPDL;
-+ if (mix->shadow_regs[ADCVOL_INDEX] &
-+ (1 << TSC2301_MUTE_LEFT_SHIFT))
-+ /* right ADC muted. Power down the right ADC */
-+ pd_ctrl |= TSC2301_REG_PD_MISC_ADPDR;
-+ else
-+ pd_ctrl &= ~TSC2301_REG_PD_MISC_ADPDR;
-+ }
-+ if (shadow_index < 0 || shadow_index == DACVOL_INDEX) {
-+ /* DAC power down control */
-+ if ((mix->shadow_regs[DACVOL_INDEX] &
-+ TSC2301_MUTE_MASK) == TSC2301_MUTE_MASK)
-+ /* both DACs muted. Power down the DAC */
-+ pd_ctrl |= TSC2301_REG_PD_MISC_DAPD;
-+ else
-+ pd_ctrl &= ~TSC2301_REG_PD_MISC_DAPD;
-+ }
-+ if (shadow_index < 0 || shadow_index == BPVOL_INDEX) {
-+ /* line bypass power down control */
-+ if ((mix->shadow_regs[BPVOL_INDEX] &
-+ TSC2301_MUTE_MASK) == TSC2301_MUTE_MASK)
-+ /* both line bypasses muted. Power down the bypass
-+ * path */
-+ pd_ctrl |= TSC2301_REG_PD_MISC_ABPD;
-+ else
-+ pd_ctrl &= ~TSC2301_REG_PD_MISC_ABPD;
-+ }
-+ if (shadow_index < 0 || shadow_index == AUDCNTL_INDEX) {
-+ /* mic bias power down control */
-+ if ((mix->shadow_regs[AUDCNTL_INDEX] &
-+ (3 << TSC2301_INML_SHIFT)) &&
-+ (mix->shadow_regs[AUDCNTL_INDEX] &
-+ (3 << TSC2301_INMR_SHIFT)))
-+ /* both ADC channels use other than mic input. Power
-+ * down the mic bias output */
-+ pd_ctrl |= TSC2301_REG_PD_MISC_MIBPD;
-+ else
-+ pd_ctrl &= ~TSC2301_REG_PD_MISC_MIBPD;
-+ }
-+
-+ /* power control decisions based on codec usage and user space mixer
-+ * selections detected above */
-+ pd_ctrl &= ~TSC2301_REG_PD_MISC_APD; /* audio not powered down */
-+ if (mix->mclk_enabled) {
-+ if (!mix->adc_enabled) {
-+ /* ADC not used, power down both ADC's and mic bias
-+ * output independently of user space mixer
-+ * selections */
-+ pd_ctrl |= TSC2301_REG_PD_MISC_ADPDL;
-+ pd_ctrl |= TSC2301_REG_PD_MISC_ADPDR;
-+ pd_ctrl |= TSC2301_REG_PD_MISC_MIBPD;
-+ }
-+ if (!mix->dac_enabled) {
-+ /* DAC not used, power down DAC independently of user
-+ * space mixer selections */
-+ pd_ctrl |= TSC2301_REG_PD_MISC_DAPD;
-+ }
-+
-+ if (mix->pll_output) {
-+ /* GPIO_0 is configured as PLL output so audio
-+ * controller is expecting clock from TSC2301. Either
-+ * ADC or DAC must be active in order to keep PLL on */
-+ if ((pd_ctrl & TSC2301_REG_PD_MISC_ADPDL) &&
-+ (pd_ctrl & TSC2301_REG_PD_MISC_ADPDR) &&
-+ (pd_ctrl & TSC2301_REG_PD_MISC_DAPD)) {
-+ /* neither ADC or DAC used. Force ADC on in
-+ * order to keep PLL active */
-+ pd_ctrl &= ~(TSC2301_REG_PD_MISC_ADPDL |
-+ TSC2301_REG_PD_MISC_ADPDR);
-+ }
-+ }
-+ } else {
-+ /* audio input clock is not enabled so power down DAC and ADC
-+ * in order to shutdown PLL and to keep touchscreen and keypad
-+ * parts working. Touchscreen and keypad use audio clock when
-+ * PLL is on and internal clock otherwise */
-+ pd_ctrl |= TSC2301_REG_PD_MISC_DAPD |
-+ TSC2301_REG_PD_MISC_ADPDL |
-+ TSC2301_REG_PD_MISC_ADPDR;
-+ }
-+
-+ if ((pd_ctrl & TSC2301_REG_PD_MISC_ADPDL) &&
-+ (pd_ctrl & TSC2301_REG_PD_MISC_ADPDR) &&
-+ (pd_ctrl & TSC2301_REG_PD_MISC_DAPD) &&
-+ (pd_ctrl & TSC2301_REG_PD_MISC_ABPD)) {
-+ /* all ADC, DAC and line bypass path unused. Power down the
-+ * whole audio part of the TSC2301 */
-+ pd_ctrl |= TSC2301_REG_PD_MISC_APD;
-+ }
-+
-+ if (pd_ctrl == pd_ctrl_old)
-+ return;
-+
-+ /* power down control changed. Update into TSC2301 */
-+ if ((pd_ctrl ^ pd_ctrl_old) & TSC2301_REG_PD_MISC_APD) {
-+ /* whole audio power state changed. Update GPIO states */
-+ if (pd_ctrl & TSC2301_REG_PD_MISC_APD) {
-+ /* power down GPIO controls before powering down
-+ * the codec */
-+ tsc2301_gpio_power_down(tsc);
-+ /* we must really ensure that codec has been on no less
-+ * than 100 msec before doing power-down */
-+ timeout = mix->pu_jiffies + TSC2301_MIN_PU_PERIOD -
-+ jiffies;
-+ if (timeout <= TSC2301_MIN_PU_PERIOD) {
-+ mix->delayed_pd_active = 1;
-+ mix->mclk_enabled++;
-+ schedule_delayed_work(&mix->delayed_power_down,
-+ timeout + 1);
-+ return;
-+ }
-+ } else
-+ /* restore GPIOs after codec is powered up */
-+ power_up = 1;
-+ }
-+ mix->shadow_regs[PD_MISC_INDEX] = pd_ctrl;
-+ tsc2301_write_reg(tsc, TSC2301_REG_PD_MISC, pd_ctrl);
-+ if (power_up)
-+ mix->pu_jiffies = jiffies;
-+ if (!poll_pdsts) {
-+ if (power_up)
-+ tsc2301_write_reg(tsc, TSC2301_REG_GPIO,
-+ mix->shadow_regs[GPIO_INDEX]);
-+ return;
-+ }
-+
-+ /* wait until power-up/-down is completed */
-+ timeout = jiffies + msecs_to_jiffies(100);
-+ w = 0;
-+ do {
-+ if (time_after(jiffies, timeout)) {
-+ /* Print a warning only if the I2S clock is not
-+ * present / out of sync. This can happen during
-+ * init time, when that clock will be turned on
-+ * by another driver like in the OMAP EAC with
-+ * external clock case.
-+ */
-+ if (w & TSC2301_REG_PD_MISC_OTSYN) {
-+ dev_warn(&tsc->spi->dev,
-+ "I2S clock not in sync or off.\n");
-+ } else {
-+ dev_err(&tsc->spi->dev,
-+ "power-up/-down timed out "
-+ "(0x%04x, 0x%04x -> 0x%04x)\n",
-+ w, pd_ctrl_old, pd_ctrl);
-+ }
-+ goto out;
-+ }
-+ w = tsc2301_read_reg(tsc, TSC2301_REG_PD_MISC);
-+ } while (!(w & TSC2301_REG_PD_MISC_PDSTS));
-+
-+out:
-+ if (((pd_ctrl ^ pd_ctrl_old) & TSC2301_REG_PD_MISC_DAPD) &&
-+ !(pd_ctrl & TSC2301_REG_PD_MISC_DAPD)) {
-+ /* DAC powered up now. Ensure that DAC and audio outputs are
-+ * activated. They are up 100 msec after the chip power-up
-+ * command */
-+ timeout = mix->pu_jiffies + TSC2301_DAC_DELAY - jiffies;
-+ if (timeout <= TSC2301_DAC_DELAY)
-+ schedule_timeout_interruptible(timeout);
-+ /* FIXME: This is lazy. We restore GPIOs only after activating
-+ * the DAC. It would be better to do some kind of delayed GPIO
-+ * restore. That ensures that we restore them also if only ADC
-+ * path is activated. But this is required only if there is
-+ * some input amplifier, bias control, etc. and their power
-+ * state is under TSC GPIO control */
-+ tsc2301_write_reg(tsc, TSC2301_REG_GPIO,
-+ mix->shadow_regs[GPIO_INDEX]);
-+ }
-+}
-+
-+static int snd_tsc2301_info_single(struct snd_kcontrol *kcontrol,
-+ struct snd_ctl_elem_info *uinfo)
-+{
-+ int mask = TSC2301_SINGLE_MASK(kcontrol->private_value);
-+ int minval = TSC2301_SINGLE_MINVAL(kcontrol->private_value);
-+
-+ uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
-+ uinfo->count = 1;
-+ uinfo->value.integer.min = minval;
-+ uinfo->value.integer.max = mask;
-+
-+ return 0;
-+}
-+
-+static int snd_tsc2301_get_single(struct snd_kcontrol *kcontrol,
-+ struct snd_ctl_elem_value *ucontrol)
-+{
-+ struct tsc2301 *tsc = kcontrol->private_data;
-+ unsigned long priv = kcontrol->private_value;
-+ int mask = TSC2301_SINGLE_MASK(priv);
-+ int shift = TSC2301_SINGLE_SHIFT(priv);
-+ int shadow_index = TSC2301_SHADOW_INDEX(priv);
-+ u16 shadow_reg;
-+
-+ shadow_reg = tsc->mixer->shadow_regs[shadow_index];
-+
-+ ucontrol->value.integer.value[0] = (shadow_reg >> shift) & mask;
-+
-+ return 0;
-+}
-+
-+static int snd_tsc2301_put_single(struct snd_kcontrol *kcontrol,
-+ struct snd_ctl_elem_value *ucontrol)
-+{
-+ struct tsc2301 *tsc = kcontrol->private_data;
-+ unsigned long priv = kcontrol->private_value;
-+ int mask = TSC2301_SINGLE_MASK(priv);
-+ int shadow_index = TSC2301_SHADOW_INDEX(priv);
-+ u16 shadow_reg, shadow_reg_old;
-+ int shift = TSC2301_SINGLE_SHIFT(priv);
-+ int reg = TSC2301_PVAL_TO_REG(priv);
-+ int changed;
-+
-+ mutex_lock(&tsc->mixer->mutex);
-+ shadow_reg = shadow_reg_old = tsc->mixer->shadow_regs[shadow_index];
-+
-+ /* zero bits to be modified */
-+ shadow_reg &= ~(mask << shift);
-+ /* modify with new value */
-+ shadow_reg |= ((ucontrol->value.integer.value[0] & mask) << shift);
-+
-+ changed = (shadow_reg != shadow_reg_old);
-+ tsc->mixer->shadow_regs[shadow_index] = shadow_reg;
-+
-+ /* update into TSC2301 if necessary */
-+ if (changed)
-+ tsc2301_write_reg(tsc, reg, shadow_reg);
-+ mutex_unlock(&tsc->mixer->mutex);
-+
-+ return changed;
-+}
-+
-+static int snd_tsc2301_info_double(struct snd_kcontrol *kcontrol,
-+ struct snd_ctl_elem_info *uinfo)
-+{
-+ /* mask == 1 : Switch
-+ * mask > 1 : Max volume */
-+ int mask = TSC2301_DOUBLE_MASK(kcontrol->private_value);
-+ int minval = TSC2301_DOUBLE_MINVAL(kcontrol->private_value);
-+
-+ uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN :
-+ SNDRV_CTL_ELEM_TYPE_INTEGER;
-+ uinfo->count = 2;
-+ uinfo->value.integer.min = minval;
-+ uinfo->value.integer.max = mask;
-+
-+ return 0;
-+}
-+
-+static int snd_tsc2301_get_double(struct snd_kcontrol *kcontrol,
-+ struct snd_ctl_elem_value *ucontrol)
-+{
-+ struct tsc2301 *tsc = kcontrol->private_data;
-+ unsigned long priv = kcontrol->private_value;
-+ /* mask == 1 : Switch
-+ * mask > 1 : Volume */
-+ int mask = TSC2301_DOUBLE_MASK(priv);
-+ int ls = TSC2301_DOUBLE_LEFT_SHIFT(priv);
-+ int rs = TSC2301_DOUBLE_RIGHT_SHIFT(priv);
-+ int shadow_index = TSC2301_SHADOW_INDEX(priv);
-+ u16 shadow_reg;
-+
-+ shadow_reg = tsc->mixer->shadow_regs[shadow_index];
-+
-+ /* invert mute bits for the switches */
-+ if (mask == 1)
-+ shadow_reg = ~shadow_reg;
-+
-+ ucontrol->value.integer.value[0] = (shadow_reg >> ls) & mask;
-+ ucontrol->value.integer.value[1] = (shadow_reg >> rs) & mask;
-+
-+ return 0;
-+}
-+
-+static int snd_tsc2301_put_double(struct snd_kcontrol *kcontrol,
-+ struct snd_ctl_elem_value *ucontrol)
-+{
-+ struct tsc2301 *tsc = kcontrol->private_data;
-+ unsigned long priv = kcontrol->private_value;
-+ /* mask == 1 : Switch
-+ * mask > 1 : Volume */
-+ int mask = TSC2301_DOUBLE_MASK(priv);
-+ int shadow_index = TSC2301_SHADOW_INDEX(priv);
-+ u16 shadow_reg, shadow_reg_old;
-+ int ls = TSC2301_DOUBLE_LEFT_SHIFT(priv);
-+ int rs = TSC2301_DOUBLE_RIGHT_SHIFT(priv);
-+ int reg = TSC2301_PVAL_TO_REG(priv);
-+ int changed;
-+
-+ mutex_lock(&tsc->mixer->mutex);
-+ shadow_reg = shadow_reg_old = tsc->mixer->shadow_regs[shadow_index];
-+
-+ /* zero bits to be modified */
-+ shadow_reg &= ~((mask << ls) | (mask << rs));
-+ /* modify with new value */
-+ if (mask == 1) {
-+ /* switch. Invert switch values for the mute bits */
-+ shadow_reg |=
-+ ((~ucontrol->value.integer.value[0] & mask) << ls) |
-+ ((~ucontrol->value.integer.value[1] & mask) << rs);
-+ } else {
-+ /* volume */
-+ shadow_reg |=
-+ (ucontrol->value.integer.value[0] << ls) |
-+ (ucontrol->value.integer.value[1] << rs);
-+ }
-+
-+ changed = (shadow_reg != shadow_reg_old);
-+ tsc->mixer->shadow_regs[shadow_index] = shadow_reg;
-+
-+ /* update into TSC2301 if necessary */
-+ if (changed)
-+ tsc2301_write_reg(tsc, reg, shadow_reg);
-+
-+ if (mask == 1)
-+ /* check is need to power down/up audio blocks in case of
-+ * muted state change */
-+ tsc2301_power_ctrl(tsc, shadow_index, 0);
-+ mutex_unlock(&tsc->mixer->mutex);
-+
-+ return changed;
-+}
-+
-+static int snd_tsc2301_info_mux(struct snd_kcontrol *kcontrol,
-+ struct snd_ctl_elem_info *uinfo)
-+{
-+ static char *texts[4] = {"Mic", "Line", "Line swapped", "Line mono"};
-+
-+ uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
-+ uinfo->count = 2;
-+ uinfo->value.enumerated.items = 4;
-+ if (uinfo->value.enumerated.item > 3)
-+ uinfo->value.enumerated.item = 3;
-+ strcpy(uinfo->value.enumerated.name,
-+ texts[uinfo->value.enumerated.item]);
-+
-+ return 0;
-+}
-+
-+static int snd_tsc2301_get_mux(struct snd_kcontrol *kcontrol,
-+ struct snd_ctl_elem_value *ucontrol)
-+{
-+ struct tsc2301 *tsc = kcontrol->private_data;
-+ unsigned long priv = kcontrol->private_value;
-+ int mask = TSC2301_MUX_MASK(priv);
-+ int ls = TSC2301_MUX_LEFT_SHIFT(priv);
-+ int rs = TSC2301_MUX_RIGHT_SHIFT(priv);
-+ int shadow_index = TSC2301_SHADOW_INDEX(priv);
-+ u16 shadow_reg;
-+
-+ shadow_reg = tsc->mixer->shadow_regs[shadow_index];
-+ ucontrol->value.enumerated.item[0] = (shadow_reg >> ls) & mask;
-+ ucontrol->value.enumerated.item[1] = (shadow_reg >> rs) & mask;
-+
-+ return 0;
-+}
-+
-+static int snd_tsc2301_put_mux(struct snd_kcontrol *kcontrol,
-+ struct snd_ctl_elem_value *ucontrol)
-+{
-+ struct tsc2301 *tsc = kcontrol->private_data;
-+ unsigned long priv = kcontrol->private_value;
-+ int mask = TSC2301_MUX_MASK(priv);
-+ int shadow_index = TSC2301_SHADOW_INDEX(priv);
-+ u16 shadow_reg, shadow_reg_old;
-+ int ls = TSC2301_MUX_LEFT_SHIFT(priv);
-+ int rs = TSC2301_MUX_RIGHT_SHIFT(priv);
-+ int reg = TSC2301_PVAL_TO_REG(priv);
-+ int changed;
-+
-+ mutex_lock(&tsc->mixer->mutex);
-+ shadow_reg = shadow_reg_old = tsc->mixer->shadow_regs[shadow_index];
-+
-+ /* zero bits to be modified */
-+ shadow_reg &= ~((mask << ls) | (mask << rs));
-+ /* modify with new value */
-+ shadow_reg |= (ucontrol->value.enumerated.item[0] << ls);
-+ shadow_reg |= (ucontrol->value.enumerated.item[1] << rs);
-+
-+ changed = (shadow_reg != shadow_reg_old);
-+
-+ /* update into TSC2301 if necessary */
-+ if (changed) {
-+ tsc->mixer->shadow_regs[shadow_index] = shadow_reg;
-+ tsc2301_write_reg(tsc, reg, shadow_reg);
-+ }
-+
-+ /* check is need to power up/down audio blocks in case of ADC input
-+ * change */
-+ tsc2301_power_ctrl(tsc, shadow_index, 0);
-+ mutex_unlock(&tsc->mixer->mutex);
-+
-+ return changed;
-+}
-+
-+static int snd_tsc2301_info_bool(struct snd_kcontrol *kcontrol,
-+ struct snd_ctl_elem_info *uinfo)
-+{
-+ uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
-+ uinfo->count = 1;
-+ uinfo->value.integer.min = 0;
-+ uinfo->value.integer.max = 1;
-+
-+ return 0;
-+}
-+
-+static int snd_tsc2301_get_bool(struct snd_kcontrol *kcontrol,
-+ struct snd_ctl_elem_value *ucontrol)
-+{
-+ struct tsc2301 *tsc = kcontrol->private_data;
-+ unsigned long priv = kcontrol->private_value;
-+ int shadow_index = TSC2301_SHADOW_INDEX(priv);
-+ int shift = TSC2301_BOOL_SHIFT(priv);
-+ int invert = TSC2301_BOOL_INVERT(priv);
-+ u16 shadow_reg;
-+
-+ shadow_reg = tsc->mixer->shadow_regs[shadow_index];
-+ ucontrol->value.integer.value[0] =
-+ invert ^ ((shadow_reg >> shift) & 1);
-+
-+ return 0;
-+}
-+
-+static int snd_tsc2301_put_bool(struct snd_kcontrol *kcontrol,
-+ struct snd_ctl_elem_value *ucontrol)
-+{
-+ struct tsc2301 *tsc = kcontrol->private_data;
-+ unsigned long priv = kcontrol->private_value;
-+ int shadow_index = TSC2301_SHADOW_INDEX(priv);
-+ int shift = TSC2301_BOOL_SHIFT(priv);
-+ int invert = TSC2301_BOOL_INVERT(priv);
-+ int reg = TSC2301_PVAL_TO_REG(priv);
-+ u16 shadow_reg, shadow_reg_old;
-+ int changed;
-+
-+ mutex_lock(&tsc->mixer->mutex);
-+ shadow_reg = shadow_reg_old = tsc->mixer->shadow_regs[shadow_index];
-+
-+ /* zero bit to be modified */
-+ shadow_reg &= ~(1 << shift);
-+ /* modify with new value */
-+ shadow_reg |=
-+ (invert ^ (ucontrol->value.integer.value[0] & 1)) << shift;
-+
-+ changed = (shadow_reg != shadow_reg_old);
-+
-+ /* update into TSC2301 if necessary */
-+ if (changed) {
-+ tsc->mixer->shadow_regs[shadow_index] = shadow_reg;
-+ if ((shadow_index == GPIO_INDEX) &&
-+ (tsc->mixer->shadow_regs[PD_MISC_INDEX] &
-+ TSC2301_REG_PD_MISC_APD)) {
-+ /* changing GPIO control and audio is powered down.
-+ * Update GPIO states according to their power-down
-+ * flag */
-+ tsc2301_gpio_power_down(tsc);
-+ } else
-+ tsc2301_write_reg(tsc, reg, shadow_reg);
-+ }
-+ mutex_unlock(&tsc->mixer->mutex);
-+
-+ return changed;
-+}
-+
-+/* TSC2301 internal mixer controls */
-+static struct snd_kcontrol_new snd_tsc2301_controls[] = {
-+ /* stereo ADC input switches and volumes */
-+ TSC2301_DOUBLE("Capture Switch", 0,
-+ TSC2301_REG_ADCVOL, ADCVOL_INDEX,
-+ TSC2301_MUTE_LEFT_SHIFT, TSC2301_MUTE_RIGHT_SHIFT,
-+ 1, 0),
-+ TSC2301_DOUBLE("Capture Volume", 0,
-+ TSC2301_REG_ADCVOL, ADCVOL_INDEX,
-+ TSC2301_VOL_LEFT_SHIFT, TSC2301_VOL_RIGHT_SHIFT,
-+ TSC2301_VOLUME_MASK, TSC2301_MIN_ADCVOL),
-+
-+ /* stereo DAC output switches and volumes */
-+ TSC2301_DOUBLE("PCM Playback Switch", 0,
-+ TSC2301_REG_DACVOL, DACVOL_INDEX,
-+ TSC2301_MUTE_LEFT_SHIFT, TSC2301_MUTE_RIGHT_SHIFT,
-+ 1, 0),
-+ TSC2301_DOUBLE("PCM Playback Volume", 0,
-+ TSC2301_REG_DACVOL, DACVOL_INDEX,
-+ TSC2301_VOL_LEFT_SHIFT, TSC2301_VOL_RIGHT_SHIFT,
-+ TSC2301_VOLUME_MASK, TSC2301_MIN_DACVOL),
-+
-+ /* stereo line input bypass switches and volumes */
-+ TSC2301_DOUBLE("Line Playback Switch", 0,
-+ TSC2301_REG_BPVOL, BPVOL_INDEX,
-+ TSC2301_MUTE_LEFT_SHIFT, TSC2301_MUTE_RIGHT_SHIFT,
-+ 1, 0),
-+ TSC2301_DOUBLE("Line Playback Volume", 0,
-+ TSC2301_REG_BPVOL, BPVOL_INDEX,
-+ TSC2301_VOL_LEFT_SHIFT, TSC2301_VOL_RIGHT_SHIFT,
-+ TSC2301_VOLUME_MASK, TSC2301_MIN_BPVOL),
-+
-+ /* mono microphone input gain */
-+ TSC2301_SINGLE("Mic Boost", 0,
-+ TSC2301_REG_AUDCNTL, AUDCNTL_INDEX,
-+ TSC2301_MICG_SHIFT,
-+ TSC2301_MICG_MASK, TSC2301_MICG_MIN),
-+
-+ /* ADC input sources. Both channels could be selected separately */
-+ TSC2301_MUX("Capture Source", 0,
-+ TSC2301_REG_AUDCNTL, AUDCNTL_INDEX,
-+ TSC2301_INML_SHIFT, TSC2301_INMR_SHIFT,
-+ TSC2301_INM_MASK),
-+};
-+
-+/* must be called tsc->mixer->mutex locked */
-+static void tsc2301_flush_shadow_regs(struct tsc2301 *tsc)
-+{
-+ int i, page, addr;
-+ u16 temp;
-+
-+ page = TSC2301_REG_TO_PAGE(TSC2301_REG_AUDCNTL);
-+ addr = TSC2301_REG_TO_ADDR(TSC2301_REG_AUDCNTL);
-+
-+ for (i = 0; i < 4; i++) {
-+ temp = tsc->mixer->shadow_regs[i];
-+ tsc2301_write_reg(tsc, TSC2301_REG(page, addr + i), temp);
-+ }
-+ temp = tsc->mixer->shadow_regs[GPIO_INDEX];
-+ tsc2301_write_reg(tsc, TSC2301_REG_GPIO, temp);
-+
-+ /* Update power state of all audio blocks depending are they
-+ * muted or unused. */
-+ tsc2301_power_ctrl(tsc, -1, 0);
-+}
-+
-+#ifdef CONFIG_PM
-+int tsc2301_mixer_suspend(struct tsc2301 *tsc)
-+{
-+ /* power down entire audio section inside TSC2301 in case the
-+ * chip is still powered during the system sleep. However this driver
-+ * doesn't require that chip is powered because registers are restored
-+ * in function tsc2301_mixer_resume */
-+ mutex_lock(&tsc->mixer->mutex);
-+ tsc2301_gpio_power_down(tsc);
-+ tsc->mixer->shadow_regs[PD_MISC_INDEX] |= TSC2301_REG_PD_MISC_APD;
-+ tsc2301_write_reg(tsc, TSC2301_REG_PD_MISC,
-+ tsc->mixer->shadow_regs[PD_MISC_INDEX]);
-+ mutex_unlock(&tsc->mixer->mutex);
-+ return 0;
-+}
-+
-+void tsc2301_mixer_resume(struct tsc2301 *tsc)
-+{
-+ /* power up the TSC2301 audio section and restore registers */
-+ mutex_lock(&tsc->mixer->mutex);
-+ tsc->mixer->shadow_regs[PD_MISC_INDEX] &= ~TSC2301_REG_PD_MISC_APD;
-+ tsc2301_flush_shadow_regs(tsc);
-+ mutex_unlock(&tsc->mixer->mutex);
-+}
-+#endif
-+
-+void tsc2301_mixer_enable_mclk(struct device *dev)
-+{
-+ struct tsc2301 *tsc = dev_get_drvdata(dev);
-+ struct tsc2301_mixer *mix = tsc->mixer;
-+
-+ mutex_lock(&mix->mutex);
-+ if (!mix->mclk_enabled++ && tsc->enable_clock != NULL) {
-+ tsc->enable_clock(dev);
-+ }
-+ tsc2301_power_ctrl(tsc, -1, 1);
-+ mutex_unlock(&mix->mutex);
-+}
-+
-+void tsc2301_mixer_disable_mclk(struct device *dev)
-+{
-+ struct tsc2301 *tsc = dev_get_drvdata(dev);
-+ struct tsc2301_mixer *mix = tsc->mixer;
-+
-+ mutex_lock(&mix->mutex);
-+ mix->mclk_enabled--;
-+ tsc2301_power_ctrl(tsc, -1, 1);
-+ if (!mix->mclk_enabled && tsc->disable_clock != NULL) {
-+ tsc->disable_clock(dev);
-+ }
-+ mutex_unlock(&mix->mutex);
-+}
-+
-+static void tsc2301_mixer_delayed_power_down(struct work_struct *work)
-+{
-+ struct tsc2301_mixer *mix = container_of(work, struct tsc2301_mixer,
-+ delayed_power_down.work);
-+ struct tsc2301 *tsc = mix->tsc;
-+
-+ mutex_lock(&mix->mutex);
-+ if (!mix->delayed_pd_active) {
-+ mutex_unlock(&mix->mutex);
-+ return;
-+ }
-+ mix->delayed_pd_active = 0;
-+ mutex_unlock(&mix->mutex);
-+ tsc2301_mixer_disable_mclk(&tsc->spi->dev);
-+}
-+
-+/*
-+ * Allows audio controller driver to notify its usage of ADC and DAC
-+ */
-+void tsc2301_mixer_set_power(struct device *dev, int dac, int adc)
-+{
-+ struct tsc2301 *tsc = dev_get_drvdata(dev);
-+
-+ mutex_lock(&tsc->mixer->mutex);
-+ tsc->mixer->adc_enabled = adc;
-+ tsc->mixer->dac_enabled = dac;
-+
-+ /* update power state of all audio blocks */
-+ tsc2301_power_ctrl(tsc, -1, 1);
-+ mutex_unlock(&tsc->mixer->mutex);
-+}
-+
-+/*
-+ * Registers TSC2301 ALSA Mixer controls for the given sound card
-+ */
-+int tsc2301_mixer_register_controls(struct device *dev, struct snd_card *card)
-+{
-+ struct tsc2301 *tsc = dev_get_drvdata(dev);
-+ struct tsc2301_mixer *mix = tsc->mixer;
-+ int i, err;
-+
-+ /* Register ALSA mixer controls */
-+ for (i = 0; i < ARRAY_SIZE(snd_tsc2301_controls); i++) {
-+ err = snd_ctl_add(card,
-+ snd_ctl_new1(&snd_tsc2301_controls[i], tsc));
-+ if (err < 0)
-+ return err;
-+ }
-+
-+ if (!mix->n_mixer_gpios)
-+ return 0;
-+
-+ /* Register additional GPIO controls if defined */
-+ for (i = 0; i < mix->n_mixer_gpios; i++) {
-+ const struct tsc2301_mixer_gpio *mg = mix->mixer_gpios + i;
-+ struct snd_kcontrol *ctrlp;
-+ struct snd_kcontrol_new ctrl =
-+ TSC2301_BOOL((char *)mg->name, 0,
-+ TSC2301_REG_GPIO, GPIO_INDEX,
-+ mg->gpio, mg->inverted, mg->def_enable);
-+
-+ ctrlp = snd_ctl_new1(&ctrl, tsc);
-+ err = snd_ctl_add(card, ctrlp);
-+ if (err < 0)
-+ return err;
-+ }
-+
-+ return 0;
-+}
-+
-+int tsc2301_mixer_init(struct tsc2301 *tsc,
-+ struct tsc2301_platform_data *pdata)
-+{
-+ struct tsc2301_mixer *mix;
-+ int err = 0;
-+ u16 w;
-+
-+ mix = kzalloc(sizeof(*mix), GFP_KERNEL);
-+ if (mix == NULL)
-+ return -ENOMEM;
-+ tsc->mixer = mix;
-+
-+ mix->tsc = tsc;
-+ mutex_init(&mix->mutex);
-+ mix->platform_init = pdata->codec_init;
-+ mix->platform_cleanup = pdata->codec_cleanup;
-+ mix->pll_output = pdata->pll_output;
-+
-+ INIT_DELAYED_WORK(&mix->delayed_power_down,
-+ tsc2301_mixer_delayed_power_down);
-+
-+ /* initialize shadow register default values */
-+ w = 0xc000;
-+ w |= (pdata->mclk_ratio << 6) | (pdata->i2s_sample_rate << 2);
-+ w |= pdata->i2s_format;
-+ mix->shadow_regs[AUDCNTL_INDEX] = w;
-+ mix->shadow_regs[ADCVOL_INDEX] = 0xd7d7;
-+ mix->shadow_regs[DACVOL_INDEX] = 0xffff;
-+ mix->shadow_regs[BPVOL_INDEX] = 0xe7e7;
-+ mix->shadow_regs[PD_MISC_INDEX] = pdata->power_down_blocks;
-+
-+ /* if extra mixer controls configured, then configure associated
-+ * GPIOs as output and drive their default state */
-+ if (pdata->n_mixer_gpios) {
-+ int i;
-+
-+ w = 0;
-+ for (i = 0; i < pdata->n_mixer_gpios; i++) {
-+ const struct tsc2301_mixer_gpio *mg;
-+ int gpio;
-+
-+ mg = pdata->mixer_gpios + i;
-+ gpio = mg->gpio;
-+ w |= (1 << gpio) << 8;
-+ w |= (mg->inverted ^ mg->def_enable) << gpio;
-+ }
-+ mix->shadow_regs[GPIO_INDEX] = w;
-+
-+ mix->mixer_gpios = kmalloc(sizeof(*pdata->mixer_gpios) *
-+ pdata->n_mixer_gpios,
-+ GFP_KERNEL);
-+ if (mix->mixer_gpios == NULL) {
-+ err = -ENOMEM;
-+ goto err1;
-+ }
-+ memcpy(mix->mixer_gpios, pdata->mixer_gpios,
-+ sizeof(*pdata->mixer_gpios) * pdata->n_mixer_gpios);
-+ mix->n_mixer_gpios = pdata->n_mixer_gpios;
-+ }
-+
-+ /* PLL control */
-+ tsc2301_write_pll(tsc, pdata->pll_n, pdata->pll_a, pdata->pll_pdc,
-+ 0, mix->pll_output ? 0 : 1);
-+
-+ tsc2301_flush_shadow_regs(tsc);
-+
-+ if (mix->platform_init != NULL) {
-+ err = mix->platform_init(&tsc->spi->dev);
-+ if (err < 0)
-+ goto err2;
-+ }
-+
-+ return 0;
-+err2:
-+ if (mix->mixer_gpios != NULL)
-+ kfree(mix->mixer_gpios);
-+err1:
-+ kfree(mix);
-+ return err;
-+}
-+
-+void tsc2301_mixer_exit(struct tsc2301 *tsc)
-+{
-+ struct tsc2301_mixer *mixer = tsc->mixer;
-+
-+ if (mixer->platform_cleanup != NULL)
-+ mixer->platform_cleanup(&tsc->spi->dev);
-+
-+ if (mixer->mixer_gpios != NULL)
-+ kfree(mixer->mixer_gpios);
-+}
-+
-+MODULE_AUTHOR("Jarkko Nikula <jarkko.nikula@nokia.com>");
-+MODULE_LICENSE("GPL");
---- /dev/null
-+++ b/include/linux/spi/tsc2301.h
-@@ -0,0 +1,208 @@
-+#ifndef _LINUX_SPI_TSC2301_H
-+#define _LINUX_SPI_TSC2301_H
-+
-+#include <linux/types.h>
-+#include <linux/timer.h>
-+
-+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 */
-+ char *keyb_name; /* Keyboard device name */
-+
-+ /*
-+ * Touchscreen
-+ */
-+ s16 dav_int;
-+ 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. */
-+ u32 ts_pressure_fudge;
-+ u32 ts_x_max;
-+ u32 ts_x_fudge;
-+ u32 ts_y_max;
-+ u32 ts_y_fudge;
-+
-+ /*
-+ * 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);
-+
-+ 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
projects / 15.05 / openwrt.git / blobdiff