[ARM] 5184/1: Split ucb1400_ts into core and touchscreen

This patch splits ucb1400_ts into ucb1400_ts and ucb1400_core.
Since this chip supports more features than only touchscreen,
it was necessary to prepare it for feature addition. The
previous functionality is preserved by applying this patch.

[Build fixes for non-ARM by Stephen Rothwell and Takashi Iwai]
Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

drivers/input/touchscreen/Kconfig

@@ -220,6 +220,7 @@ config TOUCHSCREEN_ATMEL_TSADCC
 config TOUCHSCREEN_UCB1400
 	tristate "Philips UCB1400 touchscreen"
 	select AC97_BUS
+	depends on UCB1400_CORE
 	help
 	  This enables support for the Philips UCB1400 touchscreen interface.
 	  The UCB1400 is an AC97 audio codec.  The touchscreen interface

drivers/mfd/Kconfig

@@ -50,6 +50,15 @@ config HTC_PASIC3
 	  HTC Magician devices, respectively. Actual functionality is
 	  handled by the leds-pasic3 and ds1wm drivers.
 
+config UCB1400_CORE
+	tristate "Philips UCB1400 Core driver"
+	help
+	  This enables support for the Philips UCB1400 core functions.
+	  The UCB1400 is an AC97 audio codec.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ucb1400_core.
+
 config MFD_TC6393XB
 	bool "Support Toshiba TC6393XB"
 	depends on GPIOLIB && ARM

drivers/mfd/Makefile

@@ -20,3 +20,4 @@ obj-$(CONFIG_MCP_UCB1200_TS)	+= ucb1x00-ts.o
 ifeq ($(CONFIG_SA1100_ASSABET),y)
 obj-$(CONFIG_MCP_UCB1200)	+= ucb1x00-assabet.o
 endif
+obj-$(CONFIG_UCB1400_CORE)	+= ucb1400_core.o

drivers/mfd/ucb1400_core.c

+/*
+ * Core functions for:
+ *  Philips UCB1400 multifunction chip
+ *
+ * Based on ucb1400_ts.c:
+ *  Author:	Nicolas Pitre
+ *  Created:	September 25, 2006
+ *  Copyright:	MontaVista Software, Inc.
+ *
+ * Spliting done by: Marek Vasut <marek.vasut@gmail.com>
+ * If something doesnt work and it worked before spliting, e-mail me,
+ * dont bother Nicolas please ;-)
+ *
+ * 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 code is heavily based on ucb1x00-*.c copyrighted by Russell King
+ * covering the UCB1100, UCB1200 and UCB1300..  Support for the UCB1400 has
+ * been made separate from ucb1x00-core/ucb1x00-ts on Russell's request.
+ */
+
+#include <linux/module.h>
+#include <linux/ucb1400.h>
+
+static int ucb1400_core_probe(struct device *dev)
+{
+	int err;
+	struct ucb1400 *ucb;
+	struct ucb1400_ts ucb_ts;
+	struct snd_ac97 *ac97;
+
+	memset(&ucb_ts, 0, sizeof(ucb_ts));
+
+	ucb = kzalloc(sizeof(struct ucb1400), GFP_KERNEL);
+	if (!ucb) {
+		err = -ENOMEM;
+		goto err;
+	}
+
+	dev_set_drvdata(dev, ucb);
+
+	ac97 = to_ac97_t(dev);
+
+	ucb_ts.id = ucb1400_reg_read(ac97, UCB_ID);
+	if (ucb_ts.id != UCB_ID_1400) {
+		err = -ENODEV;
+		goto err0;
+	}
+
+	/* TOUCHSCREEN */
+	ucb_ts.ac97 = ac97;
+	ucb->ucb1400_ts = platform_device_alloc("ucb1400_ts", -1);
+	if (!ucb->ucb1400_ts) {
+		err = -ENOMEM;
+		goto err0;
+	}
+	err = platform_device_add_data(ucb->ucb1400_ts, &ucb_ts,
+					sizeof(ucb_ts));
+	if (err)
+		goto err1;
+	err = platform_device_add(ucb->ucb1400_ts);
+	if (err)
+		goto err1;
+
+	return 0;
+
+err1:
+	platform_device_put(ucb->ucb1400_ts);
+err0:
+	kfree(ucb);
+err:
+	return err;
+}
+
+static int ucb1400_core_remove(struct device *dev)
+{
+	struct ucb1400 *ucb = dev_get_drvdata(dev);
+
+	platform_device_unregister(ucb->ucb1400_ts);
+	kfree(ucb);
+	return 0;
+}
+
+static struct device_driver ucb1400_core_driver = {
+	.name	= "ucb1400_core",
+	.bus	= &ac97_bus_type,
+	.probe	= ucb1400_core_probe,
+	.remove	= ucb1400_core_remove,
+};
+
+static int __init ucb1400_core_init(void)
+{
+	return driver_register(&ucb1400_core_driver);
+}
+
+static void __exit ucb1400_core_exit(void)
+{
+	driver_unregister(&ucb1400_core_driver);
+}
+
+module_init(ucb1400_core_init);
+module_exit(ucb1400_core_exit);
+
+MODULE_DESCRIPTION("Philips UCB1400 driver");
+MODULE_LICENSE("GPL");

include/linux/ucb1400.h

+/*
+ * Register definitions and functions for:
+ *  Philips UCB1400 driver
+ *
+ * Based on ucb1400_ts:
+ *  Author:	Nicolas Pitre
+ *  Created:	September 25, 2006
+ *  Copyright:	MontaVista Software, Inc.
+ *
+ * Spliting done by: Marek Vasut <marek.vasut@gmail.com>
+ * If something doesnt work and it worked before spliting, e-mail me,
+ * dont bother Nicolas please ;-)
+ *
+ * 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 code is heavily based on ucb1x00-*.c copyrighted by Russell King
+ * covering the UCB1100, UCB1200 and UCB1300..  Support for the UCB1400 has
+ * been made separate from ucb1x00-core/ucb1x00-ts on Russell's request.
+ */
+
+#ifndef _LINUX__UCB1400_H
+#define _LINUX__UCB1400_H
+
+#include <sound/ac97_codec.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+
+/*
+ * UCB1400 AC-link registers
+ */
+
+#define UCB_IO_DATA		0x5a
+#define UCB_IO_DIR		0x5c
+#define UCB_IE_RIS		0x5e
+#define UCB_IE_FAL		0x60
+#define UCB_IE_STATUS		0x62
+#define UCB_IE_CLEAR		0x62
+#define UCB_IE_ADC		(1 << 11)
+#define UCB_IE_TSPX		(1 << 12)
+
+#define UCB_TS_CR		0x64
+#define UCB_TS_CR_TSMX_POW	(1 << 0)
+#define UCB_TS_CR_TSPX_POW	(1 << 1)
+#define UCB_TS_CR_TSMY_POW	(1 << 2)
+#define UCB_TS_CR_TSPY_POW	(1 << 3)
+#define UCB_TS_CR_TSMX_GND	(1 << 4)
+#define UCB_TS_CR_TSPX_GND	(1 << 5)
+#define UCB_TS_CR_TSMY_GND	(1 << 6)
+#define UCB_TS_CR_TSPY_GND	(1 << 7)
+#define UCB_TS_CR_MODE_INT	(0 << 8)
+#define UCB_TS_CR_MODE_PRES	(1 << 8)
+#define UCB_TS_CR_MODE_POS	(2 << 8)
+#define UCB_TS_CR_BIAS_ENA	(1 << 11)
+#define UCB_TS_CR_TSPX_LOW	(1 << 12)
+#define UCB_TS_CR_TSMX_LOW	(1 << 13)
+
+#define UCB_ADC_CR		0x66
+#define UCB_ADC_SYNC_ENA	(1 << 0)
+#define UCB_ADC_VREFBYP_CON	(1 << 1)
+#define UCB_ADC_INP_TSPX	(0 << 2)
+#define UCB_ADC_INP_TSMX	(1 << 2)
+#define UCB_ADC_INP_TSPY	(2 << 2)
+#define UCB_ADC_INP_TSMY	(3 << 2)
+#define UCB_ADC_INP_AD0		(4 << 2)
+#define UCB_ADC_INP_AD1		(5 << 2)
+#define UCB_ADC_INP_AD2		(6 << 2)
+#define UCB_ADC_INP_AD3		(7 << 2)
+#define UCB_ADC_EXT_REF		(1 << 5)
+#define UCB_ADC_START		(1 << 7)
+#define UCB_ADC_ENA		(1 << 15)
+
+#define UCB_ADC_DATA		0x68
+#define UCB_ADC_DAT_VALID	(1 << 15)
+#define UCB_ADC_DAT_MASK	0x3ff
+
+#define UCB_ID			0x7e
+#define UCB_ID_1400             0x4304
+
+struct ucb1400_ts {
+	struct input_dev	*ts_idev;
+	struct task_struct	*ts_task;
+	int			id;
+	wait_queue_head_t	ts_wait;
+	unsigned int		ts_restart:1;
+	int			irq;
+	unsigned int		irq_pending;	/* not bit field shared */
+	struct snd_ac97		*ac97;
+};
+
+struct ucb1400 {
+	struct platform_device	*ucb1400_ts;
+};
+
+static inline u16 ucb1400_reg_read(struct snd_ac97 *ac97, u16 reg)
+{
+	return ac97->bus->ops->read(ac97, reg);
+}
+
+static inline void ucb1400_reg_write(struct snd_ac97 *ac97, u16 reg, u16 val)
+{
+	ac97->bus->ops->write(ac97, reg, val);
+}
+
+static inline u16 ucb1400_gpio_get_value(struct snd_ac97 *ac97, u16 gpio)
+{
+	return ucb1400_reg_read(ac97, UCB_IO_DATA) & (1 << gpio);
+}
+
+static inline void ucb1400_gpio_set_value(struct snd_ac97 *ac97, u16 gpio,
+						u16 val)
+{
+	ucb1400_reg_write(ac97, UCB_IO_DATA, val ?
+			ucb1400_reg_read(ac97, UCB_IO_DATA) | (1 << gpio) :
+			ucb1400_reg_read(ac97, UCB_IO_DATA) & ~(1 << gpio));
+}
+
+static inline u16 ucb1400_gpio_get_direction(struct snd_ac97 *ac97, u16 gpio)
+{
+	return ucb1400_reg_read(ac97, UCB_IO_DIR) & (1 << gpio);
+}
+
+static inline void ucb1400_gpio_set_direction(struct snd_ac97 *ac97, u16 gpio,
+						u16 dir)
+{
+	ucb1400_reg_write(ac97, UCB_IO_DIR, dir ?
+			ucb1400_reg_read(ac97, UCB_IO_DIR) | (1 << gpio) :
+			ucb1400_reg_read(ac97, UCB_IO_DIR) & ~(1 << gpio));
+}
+
+static inline void ucb1400_adc_enable(struct snd_ac97 *ac97)
+{
+	ucb1400_reg_write(ac97, UCB_ADC_CR, UCB_ADC_ENA);
+}
+
+static unsigned int ucb1400_adc_read(struct snd_ac97 *ac97, u16 adc_channel,
+					int adcsync)
+{
+	unsigned int val;
+
+	if (adcsync)
+		adc_channel |= UCB_ADC_SYNC_ENA;
+
+	ucb1400_reg_write(ac97, UCB_ADC_CR, UCB_ADC_ENA | adc_channel);
+	ucb1400_reg_write(ac97, UCB_ADC_CR, UCB_ADC_ENA | adc_channel |
+				UCB_ADC_START);
+
+	while (!((val = ucb1400_reg_read(ac97, UCB_ADC_DATA))
+			& UCB_ADC_DAT_VALID))
+		schedule_timeout_uninterruptible(1);
+
+	return val & UCB_ADC_DAT_MASK;
+}
+
+static inline void ucb1400_adc_disable(struct snd_ac97 *ac97)
+{
+	ucb1400_reg_write(ac97, UCB_ADC_CR, 0);
+}
+
+#endif