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openwrt-xburst/target/linux/omap24xx/patches-3.1/315-n800-touchscreen-and-keypad-drivers.patch
mb 9c6027e5b7 omap24xx: Refresh 3.1 patches 
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@28676 3c298f89-4303-0410-b956-a3cf2f4a3e73
2011-10-29 22:52:07 +00:00

2814 lines
79 KiB
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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
Index: linux-3.1/drivers/input/keyboard/Kconfig
===================================================================
--- linux-3.1.orig/drivers/input/keyboard/Kconfig 2011-10-30 00:48:29.357056963 +0200
+++ linux-3.1/drivers/input/keyboard/Kconfig 2011-10-30 00:48:48.989043470 +0200
@@ -530,6 +530,12 @@ 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
Index: linux-3.1/drivers/input/keyboard/Makefile
===================================================================
--- linux-3.1.orig/drivers/input/keyboard/Makefile 2011-10-30 00:48:29.365056957 +0200
+++ linux-3.1/drivers/input/keyboard/Makefile 2011-10-30 00:48:48.989043470 +0200
@@ -48,6 +48,7 @@ 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
Index: linux-3.1/drivers/input/keyboard/tsc2301_kp.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-3.1/drivers/input/keyboard/tsc2301_kp.c 2011-10-30 00:48:48.989043470 +0200
@@ -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, IRQF_SAMPLE_RANDOM,
+ "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);
+}
Index: linux-3.1/drivers/input/touchscreen/Kconfig
===================================================================
--- linux-3.1.orig/drivers/input/touchscreen/Kconfig 2011-10-30 00:48:29.341056972 +0200
+++ linux-3.1/drivers/input/touchscreen/Kconfig 2011-10-30 00:48:48.989043470 +0200
@@ -673,6 +673,12 @@ 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
Index: linux-3.1/drivers/input/touchscreen/Makefile
===================================================================
--- linux-3.1.orig/drivers/input/touchscreen/Makefile 2011-10-30 00:48:29.349056969 +0200
+++ linux-3.1/drivers/input/touchscreen/Makefile 2011-10-30 00:48:48.989043470 +0200
@@ -48,6 +48,7 @@ obj-$(CONFIG_TOUCHSCREEN_TOUCHRIGHT) +=
obj-$(CONFIG_TOUCHSCREEN_TOUCHWIN) += touchwin.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
Index: linux-3.1/drivers/input/touchscreen/tsc2301_ts.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-3.1/drivers/input/touchscreen/tsc2301_ts.c 2011-10-30 00:48:48.989043470 +0200
@@ -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_SAMPLE_RANDOM | 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");
Index: linux-3.1/drivers/spi/Kconfig
===================================================================
--- linux-3.1.orig/drivers/spi/Kconfig 2011-10-30 00:48:29.373056952 +0200
+++ linux-3.1/drivers/spi/Kconfig 2011-10-30 00:48:48.989043470 +0200
@@ -435,6 +435,28 @@ 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
#
Index: linux-3.1/drivers/spi/Makefile
===================================================================
--- linux-3.1.orig/drivers/spi/Makefile 2011-10-30 00:48:29.385056944 +0200
+++ linux-3.1/drivers/spi/Makefile 2011-10-30 00:48:48.989043470 +0200
@@ -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
Index: linux-3.1/drivers/spi/tsc2301-core.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-3.1/drivers/spi/tsc2301-core.c 2011-10-30 00:48:48.989043470 +0200
@@ -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 Yrj<72>l<EFBFBD> <juha.yrjola@nokia.com>");
+MODULE_LICENSE("GPL");
Index: linux-3.1/drivers/spi/tsc2301-mixer.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-3.1/drivers/spi/tsc2301-mixer.c 2011-10-30 00:48:48.989043470 +0200
@@ -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");
Index: linux-3.1/include/linux/spi/tsc2301.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-3.1/include/linux/spi/tsc2301.h 2011-10-30 00:48:48.989043470 +0200
@@ -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
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