SPI: Add TSC2102 main SPI driver

This adds a driver for the TSC2102 chip by Texas Instruments. This
driver is responsible for all communication with the chip and doesn't
export anything for user-space, but for other drivers controlling
devices connected to the chip.
Signed-off-by: Andrzej Zaborowski <balrog@zabor.org>

drivers/spi/Kconfig

@@ -166,6 +166,13 @@ config SPI_TSC2101
 	 At the moment it provides basic register read / write interface
 	 as well as a way to enable the MCLK clock.
 
+config SPI_TSC2102
+       depends on SPI_MASTER
+       tristate "TSC2102 codec support"
+       ---help---
+         Say Y here if you want support for the TSC2102 chip.  It
+	 will be needed for the touchscreen driver on some boards.
+
 #
 # Add new SPI protocol masters in alphabetical order above this line
 #

drivers/spi/Makefile

@@ -26,6 +26,7 @@ obj-$(CONFIG_SPI_S3C24XX)		+= spi_s3c24xx.o
 # SPI protocol drivers (device/link on bus)
 obj-$(CONFIG_SPI_AT25)		+= at25.o
 obj-$(CONFIG_SPI_TSC2101)	+= tsc2101.o
+obj-$(CONFIG_SPI_TSC2102)	+= tsc2102.o
 # 	... add above this line ...
 
 # SPI slave controller drivers (upstream link)

include/linux/spi/tsc2102.h

+/*
+ * include/linux/spi/tsc2102.h
+ *
+ * TI TSC2102 Touchscreen, Audio and Battery control register definitions 
+ *
+ * Copyright (c) 2005 Andrzej Zaborowski  <balrog@zabor.org>
+ *
+ * This package 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 package 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 package; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef __LINUX_SPI_TSC2102_H
+#define __LINUX_SPI_TSC2102_H
+
+struct apm_power_info;
+struct tsc2102_config {
+	int use_internal;	/* Use internal reference voltage */
+	uint32_t monitor;	/* What inputs are relevant */
+	int temp_at25c[2];	/* Thermometer calibration data */
+	void (*apm_report)(struct apm_power_info *info, int *battery);
+				/* Report status to APM based on battery[] */
+	void *alsa_config;	/* .platform_data for the ALSA device */
+};
+
+#define TSC_BAT1	(1 << 0)
+#define TSC_BAT2	(1 << 1)
+#define TSC_AUX		(1 << 2)
+#define TSC_TEMP	(1 << 4)
+
+extern u16 tsc2102_read_sync(int page, u8 address);
+extern void tsc2102_reads_sync(int page, u8 startaddress, u16 *data,
+		int numregs);
+extern void tsc2102_write_sync(int page, u8 address, u16 data);
+
+typedef void (*tsc2102_touch_t)(int touching);
+typedef void (*tsc2102_coords_t)(int x, int y, int z1, int z2);
+typedef void (*tsc2102_ports_t)(int bat1, int bat2, int aux);
+typedef void (*tsc2102_temp_t)(int temp);
+extern int tsc2102_touch_cb(tsc2102_touch_t handler);
+extern int tsc2102_coords_cb(tsc2102_coords_t handler);
+extern int tsc2102_ports_cb(tsc2102_ports_t handler);
+extern int tsc2102_temp1_cb(tsc2102_temp_t handler);
+extern int tsc2102_temp2_cb(tsc2102_temp_t handler);
+
+#ifdef CONFIG_SOUND
+extern void tsc2102_set_volume(uint8_t left_ch, uint8_t right_ch);
+extern void tsc2102_set_mute(int left_ch, int right_ch);
+extern void tsc2102_get_mute(int *left_ch, int *right_ch);
+extern void tsc2102_dac_power(int state);
+extern int tsc2102_set_rate(int rate);
+extern void tsc2102_set_i2s_master(int state);
+extern void tsc2102_set_deemphasis(int enable);
+extern void tsc2102_set_bassboost(int enable);
+#endif
+
+extern void tsc2102_keyclick(int amplitude, int freq, int length);
+
+#define TSC2102_REG(pg, addr)		pg, addr
+
+/* Page 0, Touch Screen & Keypad Data registers */
+#define TSC2102_TS_X			TSC2102_REG(0, 0x00)
+#define TSC2102_TS_Y			TSC2102_REG(0, 0x01)
+#define TSC2102_TS_Z1			TSC2102_REG(0, 0x02)
+#define TSC2102_TS_Z2			TSC2102_REG(0, 0x03)
+#define TSC2102_TS_BAT1			TSC2102_REG(0, 0x05)
+#define TSC2102_TS_BAT2			TSC2102_REG(0, 0x06)
+#define TSC2102_TS_AUX			TSC2102_REG(0, 0x07)
+#define TSC2102_TS_TEMP1		TSC2102_REG(0, 0x09)
+#define TSC2102_TS_TEMP2		TSC2102_REG(0, 0x0a)
+
+/* Page 1, Touch Screen & Keypad Control registers */
+#define TSC2102_TS_ADC_CTRL		TSC2102_REG(1, 0x00)
+#define TSC2102_TS_STATUS_CTRL		TSC2102_REG(1, 0x01)
+#define TSC2102_TS_REF_CTRL		TSC2102_REG(1, 0x03)
+#define TSC2102_TS_RESET_CTRL		TSC2102_REG(1, 0x04)
+#define TSC2102_TS_CONFIG_CTRL		TSC2102_REG(1, 0x05)
+
+/* Page 2, Audio Control registers */
+#define TSC2102_AUDIO1_CTRL		TSC2102_REG(2, 0x00)
+#define TSC2102_DAC_GAIN_CTRL		TSC2102_REG(2, 0x02)
+#define TSC2102_AUDIO2_CTRL		TSC2102_REG(2, 0x04)
+#define TSC2102_DAC_POWER_CTRL		TSC2102_REG(2, 0x05)
+#define TSC2102_AUDIO3_CTRL		TSC2102_REG(2, 0x06)
+#define TSC2102_LCH_BASS_BOOST_N0	TSC2102_REG(2, 0x07)
+#define TSC2102_LCH_BASS_BOOST_N1	TSC2102_REG(2, 0x08)
+#define TSC2102_LCH_BASS_BOOST_N2	TSC2102_REG(2, 0x09)
+#define TSC2102_LCH_BASS_BOOST_N3	TSC2102_REG(2, 0x0a)
+#define TSC2102_LCH_BASS_BOOST_N4	TSC2102_REG(2, 0x0b)
+#define TSC2102_LCH_BASS_BOOST_N5	TSC2102_REG(2, 0x0c)
+#define TSC2102_LCH_BASS_BOOST_D1	TSC2102_REG(2, 0x0d)
+#define TSC2102_LCH_BASS_BOOST_D2	TSC2102_REG(2, 0x0e)
+#define TSC2102_LCH_BASS_BOOST_D4	TSC2102_REG(2, 0x0f)
+#define TSC2102_LCH_BASS_BOOST_D5	TSC2102_REG(2, 0x10)
+#define TSC2102_RCH_BASS_BOOST_N0	TSC2102_REG(2, 0x11)
+#define TSC2102_RCH_BASS_BOOST_N1	TSC2102_REG(2, 0x12)
+#define TSC2102_RCH_BASS_BOOST_N2	TSC2102_REG(2, 0x13)
+#define TSC2102_RCH_BASS_BOOST_N3	TSC2102_REG(2, 0x14)
+#define TSC2102_RCH_BASS_BOOST_N4	TSC2102_REG(2, 0x15)
+#define TSC2102_RCH_BASS_BOOST_N5	TSC2102_REG(2, 0x16)
+#define TSC2102_RCH_BASS_BOOST_D1	TSC2102_REG(2, 0x17)
+#define TSC2102_RCH_BASS_BOOST_D2	TSC2102_REG(2, 0x18)
+#define TSC2102_RCH_BASS_BOOST_D4	TSC2102_REG(2, 0x19)
+#define TSC2102_RCH_BASS_BOOST_D5	TSC2102_REG(2, 0x1a)
+#define TSC2102_PLL1_CTRL		TSC2102_REG(2, 0x1b)
+#define TSC2102_PLL2_CTRL		TSC2102_REG(2, 0x1c)
+#define TSC2102_AUDIO4_CTRL		TSC2102_REG(2, 0x1d)
+
+/* Field masks for Audio Control 1 */
+#define AC1_WLEN(ARG)			(((ARG) & 0x03) << 10)
+#define AC1_DATFM(ARG)			(((ARG) & 0x03) << 8)
+#define AC1_DACFS(ARG)			((ARG) & 0x3f)
+
+/* Field masks for TSC2102_DAC_GAIN_CTRL */
+#define DGC_DALMU			(1 << 15)
+#define DGC_DALVL(ARG)			(((ARG) & 0x7f) << 8)
+#define DGC_DARMU			(1 << 7)
+#define DGC_DARVL(ARG)			(((ARG) & 0x7f))
+
+/* Field formats for TSC2102_AUDIO2_CTRL */
+#define AC2_KCLEN			(1 << 15)
+#define AC2_KCLAC(ARG)			(((ARG) & 0x07) << 12)
+#define AC2_KCLFRQ(ARG)			(((ARG) & 0x07) << 8)
+#define AC2_KCLLN(ARG)			(((ARG) & 0x0f) << 4)
+#define AC2_DLGAF			(1 << 3)
+#define AC2_DRGAF			(1 << 2)
+#define AC2_DASTC			(1 << 1)
+
+/* Field masks for TSC2102_DAC_POWER_CTRL */
+#define CPC_PWDNC			(1 << 15)
+#define CPC_DAODRC			(1 << 12)
+#define CPC_DAPWDN			(1 << 10)
+#define CPC_VGPWDN			(1 << 8)
+#define CPC_DAPWDF			(1 << 6)
+#define CPC_BASSBC			(1 << 1)
+#define CPC_DEEMPF			(0x01)
+
+/* Field masks for TSC2101_AUDIO_CTRL_3 */
+#define AC3_DMSVOL(ARG)			(((ARG) & 0x03) << 14)
+#define AC3_REFFS			(1 << 13)
+#define AC3_DAXFM			(1 << 12)
+#define AC3_SLVMS			(1 << 11)
+#define AC3_DALOVF			(1 << 7)
+#define AC3_DAROVF			(1 << 6)
+#define AC3_REVID(ARG)			(((ARG) & 0x07))
+
+/* Field masks for TSC2102_PLL1_CTRL */
+#define PLL1_PLLEN			(1 << 15)
+#define PLL1_Q_VAL(ARG)			(((ARG) & 0x0f) << 11)
+#define PLL1_P_VAL(ARG)			(((ARG) & 0x07) << 8)
+#define PLL1_I_VAL(ARG)			(((ARG) & 0x3f) << 2)
+
+/* Field masks for TSC2102_PLL2_CTRL */
+#define PLL2_D_VAL(ARG)			(((ARG) & 0x3fff) << 2)
+
+/* Field masks for TSC2101_AUDIO_CTRL_4 */
+#define AC4_DASTPD			(1 << 14)
+
+struct tsc2102_rate_info_s {
+	u16 sample_rate;
+	u8 divisor;
+	u8 fs_44k;	/* 44.1 kHz Fsref if 1, 48 kHz if 0 */
+};
+
+#endif	/* __LINUX_SPI_TSC2102_H */