r1970 - trunk/src/target/kernel/patches
laforge at sita.openmoko.org
laforge at sita.openmoko.org
Wed May 16 17:47:09 CEST 2007
Author: laforge
Date: 2007-05-16 17:46:56 +0200 (Wed, 16 May 2007)
New Revision: 1970
Added:
trunk/src/target/kernel/patches/hxd8-tsl256x.patch
Modified:
trunk/src/target/kernel/patches/series
Log:
* Add new TSL256x ambient light sensor driver
Added: trunk/src/target/kernel/patches/hxd8-tsl256x.patch
===================================================================
--- trunk/src/target/kernel/patches/hxd8-tsl256x.patch 2007-05-16 15:16:48 UTC (rev 1969)
+++ trunk/src/target/kernel/patches/hxd8-tsl256x.patch 2007-05-16 15:46:56 UTC (rev 1970)
@@ -0,0 +1,517 @@
+Index: linux-2.6.21-moko/drivers/i2c/chips/tsl256x.c
+===================================================================
+--- /dev/null
++++ linux-2.6.21-moko/drivers/i2c/chips/tsl256x.c
+@@ -0,0 +1,310 @@
++/*
++ * tsl256x.c -- TSL256x Light Sensor driver
++ *
++ * Copyright 2007 by Fiwin.
++ * Author: Alec Tsai <alec_tsai at fiwin.com.tw>
++ *
++ * 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 I2C client driver refers to pcf50606.c.
++ */
++
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/i2c.h>
++#include <linux/types.h>
++#include <linux/input.h>
++
++#include "tsl256x.h"
++
++static unsigned short normal_i2c[] = { 0x39, I2C_CLIENT_END };
++/* Magic definition of all other variables and things */
++I2C_CLIENT_INSMOD;
++
++struct tsl256x_data {
++ struct i2c_client client;
++ struct mutex lock;
++ struct input_dev *input_dev;
++};
++
++static struct i2c_driver tsl256x_driver;
++
++/******************************************************************************
++ * Low-Level routines
++ *****************************************************************************/
++static inline int __reg_write(struct tsl256x_data *tsl, u_int8_t reg,
++ u_int8_t val)
++{
++ return i2c_smbus_write_byte_data(&tsl->client, reg, val);
++}
++
++static int reg_write(struct tsl256x_data *tsl, u_int8_t reg, u_int8_t val)
++{
++ int ret;
++
++ mutex_lock(&tsl->lock);
++ ret = __reg_write(tsl, reg, val);
++ mutex_unlock(&tsl->lock);
++
++ return ret;
++}
++
++static inline int32_t __reg_read(struct tsl256x_data *tsl, u_int8_t reg)
++{
++ int32_t ret;
++
++ ret = i2c_smbus_read_byte_data(&tsl->client, reg);
++
++ return ret;
++}
++
++static u_int8_t reg_read(struct tsl256x_data *tsl, u_int8_t reg)
++{
++ int32_t ret;
++
++ mutex_lock(&tsl->lock);
++ ret = __reg_read(tsl, reg);
++ mutex_unlock(&tsl->lock);
++
++ return ret & 0xff;
++}
++
++u_int32_t calculate_lux(u_int32_t iGain, u_int32_t iType, u_int32_t ch0,
++ u_int32_t ch1)
++{
++ u_int32_t channel0 = ch0 * 636 / 10;
++ u_int32_t channel1 = ch1 * 636 / 10;
++ u_int32_t lux_value = 0;
++ u_int32_t ratio = (channel1 * (2^RATIO_SCALE)) / channel0;
++ u_int32_t b = 0, m = 0;
++
++ if (0 == ch0)
++ return 0;
++ else {
++ if (ratio > (13 * (2^RATIO_SCALE) / 10))
++ return 0;
++ }
++
++ switch (iType) {
++ case 0: // T package
++ if ((ratio >= 0) && (ratio <= K1T)) {
++ b = B1T;
++ m = M1T;
++ } else if (ratio <= K2T) {
++ b = B2T;
++ m = M2T;
++ } else if (ratio <= K3T) {
++ b = B3T;
++ m = M3T;
++ } else if (ratio <= K4T) {
++ b = B4T;
++ m = M4T;
++ } else if (ratio <= K5T) {
++ b = B5T;
++ m = M5T;
++ } else if (ratio <= K6T) {
++ b = B6T;
++ m = M6T;
++ } else if (ratio <= K7T) {
++ b = B7T;
++ m = M7T;
++ } else if (ratio > K8T) {
++ b = B8T;
++ m = M8T;
++ }
++ break;
++ case 1:// CS package
++ if ((ratio >= 0) && (ratio <= K1C)) {
++ b = B1C;
++ m = M1C;
++ } else if (ratio <= K2C) {
++ b = B2C;
++ m = M2C;
++ } else if (ratio <= K3C) {
++ b = B3C;
++ m = M3C;
++ } else if (ratio <= K4C) {
++ b = B4C;
++ m = M4C;
++ } else if (ratio <= K5C) {
++ b = B5C;
++ m = M5C;
++ } else if (ratio <= K6C) {
++ b = B6C;
++ m = M6C;
++ } else if (ratio <= K7C) {
++ b = B7C;
++ m = M7C;
++ } else if (ratio > K8C) {
++ b = B8C;
++ m = M8C;
++ }
++ break;
++ default:
++ return 0;
++ break;
++ }
++
++ lux_value = ((channel0 * b) - (channel1 * m)) / 16384;
++ return(lux_value);
++}
++
++static ssize_t tsl256x_show_light_lux(struct device *dev,
++ struct device_attribute *attr, char *buf)
++{
++ struct i2c_client *client = to_i2c_client(dev);
++ struct tsl256x_data *tsl = i2c_get_clientdata(client);
++ u_int8_t low_byte_of_ch0 = 0, high_byte_of_ch0 = 0;
++ u_int8_t low_byte_of_ch1 = 0, high_byte_of_ch1 = 0;
++ u_int32_t adc_value_ch0, adc_value_ch1, adc_value;
++
++ low_byte_of_ch0 = reg_read(tsl, TSL256X_REG_DATA0LOW);
++ high_byte_of_ch0 = reg_read(tsl, TSL256X_REG_DATA0HIGH);
++ low_byte_of_ch1 = reg_read(tsl, TSL256X_REG_DATA1LOW);
++ high_byte_of_ch1 = reg_read(tsl, TSL256X_REG_DATA1HIGH);
++
++ adc_value_ch0 = (high_byte_of_ch0 * 256 + low_byte_of_ch0) * 16;
++ adc_value_ch1 = (high_byte_of_ch1 * 256 + low_byte_of_ch1) * 16;
++
++ adc_value = calculate_lux(0, 0, adc_value_ch0, adc_value_ch1);
++ return sprintf(buf, "%d\n", adc_value);
++}
++
++static DEVICE_ATTR(light_lux, S_IRUGO, tsl256x_show_light_lux, NULL);
++
++static int tsl256x_detect(struct i2c_adapter *adapter, int address, int kind)
++{
++ struct i2c_client *new_client = NULL;
++ struct tsl256x_data *tsl256x = NULL;
++ u_int8_t id = 0;
++ int res = 0;
++
++ if (!(tsl256x = kzalloc(sizeof(*tsl256x), GFP_KERNEL)))
++ return -ENOMEM;
++
++ mutex_init(&tsl256x->lock);
++ new_client = &tsl256x->client;
++ i2c_set_clientdata(new_client, tsl256x);
++ new_client->addr = address;
++ new_client->adapter = adapter;
++ new_client->driver = &tsl256x_driver;
++ new_client->flags = 0;
++ strlcpy(new_client->name, "tsl256x", I2C_NAME_SIZE);
++
++ /* now we try to detect the chip */
++ /* register with i2c core */
++ res = i2c_attach_client(new_client);
++ if (res) {
++ printk(KERN_DEBUG "[%s]Error: during i2c_attach_client()\n",
++ new_client->name);
++ goto exit_free;
++ } else {
++ printk(KERN_INFO "TSL256X is attached to I2C bus.\n");
++ }
++
++ /* Configure TSL256X. */
++ {
++ /* Power up TSL256X. */
++ reg_write(tsl256x, TSL256X_REG_CONTROL, 0x03);
++
++ /* Check TSL256X ID. */
++ id = reg_read(tsl256x, TSL256X_REG_ID);
++ if (TSL2561_ID == (id & 0xF0)) {
++ /* Configuring the Timing Register.
++ High Gain (16x), integration time of 101ms. */
++ reg_write(tsl256x, TSL256X_REG_TIMING, 0x11);
++ } else {
++ goto exit_free;
++ }
++ }
++
++ res = device_create_file(&new_client->dev, &dev_attr_light_lux);
++ if (res)
++ goto exit_detach;
++
++ return 0;
++
++exit_free:
++ kfree(tsl256x);
++ return res;
++exit_detach:
++ i2c_detach_client(new_client);
++ return res;
++}
++
++static int tsl256x_attach_adapter(struct i2c_adapter *adapter)
++{
++ return i2c_probe(adapter, &addr_data, &tsl256x_detect);
++}
++
++static int tsl256x_detach_client(struct i2c_client *client)
++{
++ struct tsl256x_data *tsl256x = i2c_get_clientdata(client);
++
++ printk(KERN_INFO "Detach TSL256X from I2C bus.\n");
++
++ /* Power down TSL256X. */
++ reg_write(tsl256x, TSL256X_REG_CONTROL, 0x00);
++
++ device_remove_file(&client->dev, &dev_attr_light_lux);
++ kfree(tsl256x);
++
++ return 0;
++}
++
++#ifdef CONFIG_PM
++static int tsl256x_suspend(struct device *dev, pm_message_t state)
++{
++ struct i2c_client *client = to_i2c_client(dev);
++ struct tsl256x_data *tsl256x = i2c_get_clientdata(client);
++
++ /* Power down TSL256X. */
++ reg_write(tsl256x, TSL256X_REG_CONTROL, 0x00);
++
++ return 0;
++}
++
++static int tsl256x_resume(struct device *dev)
++{
++ struct i2c_client *client = to_i2c_client(dev);
++ struct tsl256x_data *tsl256x = i2c_get_clientdata(client);
++
++ /* Power up TSL256X. */
++ reg_write(tsl256x, TSL256X_REG_CONTROL, 0x03);
++
++ return 0;
++}
++#endif
++
++static struct i2c_driver tsl256x_driver = {
++ .driver = {
++ .name = "tsl256x",
++ .owner = THIS_MODULE,
++#ifdef CONFIG_PM
++ .suspend = &tsl256x_suspend,
++ .resume = &tsl256x_resume,
++#endif
++ },
++ .id = I2C_DRIVERID_TSL256X,
++ .attach_adapter = &tsl256x_attach_adapter,
++ .detach_client = &tsl256x_detach_client,
++};
++
++static int __init tsl256x_init(void)
++{
++ return i2c_add_driver(&tsl256x_driver);
++}
++
++static void __exit tsl256x_exit(void)
++{
++ i2c_del_driver(&tsl256x_driver);
++}
++
++MODULE_AUTHOR("Alec Tsai <alec_tsai at fiwin.com.tw>");
++MODULE_LICENSE("GPL");
++
++module_init(tsl256x_init);
++module_exit(tsl256x_exit);
++
+Index: linux-2.6.21-moko/drivers/i2c/chips/tsl256x.h
+===================================================================
+--- /dev/null
++++ linux-2.6.21-moko/drivers/i2c/chips/tsl256x.h
+@@ -0,0 +1,154 @@
++/*
++ * tsl256x.h -- TSL256x Light Sensor driver
++ *
++ * Copyright 2007 by Fiwin.
++ * Author: Alec Tsai <alec_tsai at fiwin.com.tw>
++ *
++ * 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.
++ *
++ * The contents of header file is copied from TSL256x Datasheet.
++ */
++
++#ifndef _TSL256X_H
++#define _TSL256X_H
++
++#define TSL2560_ID 0x00
++#define TSL2561_ID 0x10
++
++#define LUX_SCALE 14 /* scale by 2^14 */
++#define RATIO_SCALE 9 /*scale ratio by 2^9 */
++
++/******************************************************************************
++ * Integration time scaling factors
++ *****************************************************************************/
++#define CH_SCALE 10 /* scale channel values by 2^10 */
++#define CHSCALE_TINT0 0x7517 /* 322/11 * 2^CH_SCALE */
++#define CHSCALE_TINT1 0x0fe7 /* 322/81 * 2^CH_SCALE */
++
++/******************************************************************************
++ * T Package coefficients
++ *****************************************************************************/
++/*
++ * For Ch1/Ch0=0.00 to 0.50
++ * Lux/Ch0=0.0304.0.062*((Ch1/Ch0)^1.4)
++ * piecewise approximation
++ * For Ch1/Ch0=0.00 to 0.125:
++ * Lux/Ch0=0.0304.0.0272*(Ch1/Ch0)
++ *
++ * For Ch1/Ch0=0.125 to 0.250:
++ * Lux/Ch0=0.0325.0.0440*(Ch1/Ch0)
++ *
++ * For Ch1/Ch0=0.250 to 0.375:
++ * Lux/Ch0=0.0351.0.0544*(Ch1/Ch0)
++ *
++ * For Ch1/Ch0=0.375 to 0.50:
++ * Lux/Ch0=0.0381.0.0624*(Ch1/Ch0)
++ *
++ * For Ch1/Ch0=0.50 to 0.61:
++ * Lux/Ch0=0.0224.0.031*(Ch1/Ch0)
++ *
++ * For Ch1/Ch0=0.61 to 0.80:
++ * Lux/Ch0=0.0128.0.0153*(Ch1/Ch0)
++ *
++ * For Ch1/Ch0=0.80 to 1.30:
++ * Lux/Ch0=0.00146.0.00112*(Ch1/Ch0)
++ *
++ * For Ch1/Ch0>1.3:
++ * Lux/Ch0=0
++ */
++#define K1T 0x0040 /* 0.125 * 2^RATIO_SCALE */
++#define B1T 0x01f2 /* 0.0304 * 2^LUX_SCALE */
++#define M1T 0x01be /* 0.0272 * 2^LUX_SCALE */
++#define K2T 0x0080 /* 0.250 * 2^RATIO_SCALE */
++#define B2T 0x0214 /* 0.0325 * 2^LUX_SCALE */
++#define M2T 0x02d1 /* 0.0440 * 2^LUX_SCALE */
++#define K3T 0x00c0 /* 0.375 * 2^RATIO_SCALE */
++#define B3T 0x023f /* 0.0351 * 2^LUX_SCALE */
++#define M3T 0x037b /* 0.0544 * 2^LUX_SCALE */
++#define K4T 0x0100 /* 0.50 * 2^RATIO_SCALE */
++#define B4T 0x0270 /* 0.0381 * 2^LUX_SCALE */
++#define M4T 0x03fe /* 0.0624 * 2^LUX_SCALE */
++#define K5T 0x0138 /* 0.61 * 2^RATIO_SCALE */
++#define B5T 0x016f /* 0.0224 * 2^LUX_SCALE */
++#define M5T 0x01fc /* 0.0310 * 2^LUX_SCALE */
++#define K6T 0x019a /* 0.80 * 2^RATIO_SCALE */
++#define B6T 0x00d2 /* 0.0128 * 2^LUX_SCALE */
++#define M6T 0x00fb /* 0.0153 * 2^LUX_SCALE */
++#define K7T 0x029a /* 1.3 * 2^RATIO_SCALE */
++#define B7T 0x0018 /* 0.00146 * 2^LUX_SCALE */
++#define M7T 0x0012 /* 0.00112 * 2^LUX_SCALE */
++#define K8T 0x029a /* 1.3 * 2^RATIO_SCALE */
++#define B8T 0x0000 /* 0.000 * 2^LUX_SCALE */
++#define M8T 0x0000 /* 0.000 * 2^LUX_SCALE */
++
++/******************************************************************************
++ * CS package coefficients
++ *****************************************************************************/
++/*
++ * For 0 <= Ch1/Ch0 <= 0.52
++ * Lux/Ch0 = 0.0315.0.0593*((Ch1/Ch0)^1.4)
++ * piecewise approximation
++ * For 0 <= Ch1/Ch0 <= 0.13
++ * Lux/Ch0 = 0.0315.0.0262*(Ch1/Ch0)
++ * For 0.13 <= Ch1/Ch0 <= 0.26
++ * Lux/Ch0 = 0.0337.0.0430*(Ch1/Ch0)
++ * For 0.26 <= Ch1/Ch0 <= 0.39
++ * Lux/Ch0 = 0.0363.0.0529*(Ch1/Ch0)
++ * For 0.39 <= Ch1/Ch0 <= 0.52
++ * Lux/Ch0 = 0.0392.0.0605*(Ch1/Ch0)
++ * For 0.52 < Ch1/Ch0 <= 0.65
++ * Lux/Ch0 = 0.0229.0.0291*(Ch1/Ch0)
++ * For 0.65 < Ch1/Ch0 <= 0.80
++ * Lux/Ch0 = 0.00157.0.00180*(Ch1/Ch0)
++ * For 0.80 < Ch1/Ch0 <= 1.30
++ * Lux/Ch0 = 0.00338.0.00260*(Ch1/Ch0)
++ * For Ch1/Ch0 > 1.30
++ * Lux = 0
++ */
++#define K1C 0x0043 /* 0.130 * 2^RATIO_SCALE */
++#define B1C 0x0204 /* 0.0315 * 2^LUX_SCALE */
++#define M1C 0x01ad /* 0.0262 * 2^LUX_SCALE */
++#define K2C 0x0085 /* 0.260 * 2^RATIO_SCALE */
++#define B2C 0x0228 /* 0.0337 * 2^LUX_SCALE */
++#define M2C 0x02c1 /* 0.0430 * 2^LUX_SCALE */
++#define K3C 0x00c8 /* 0.390 * 2^RATIO_SCALE */
++#define B3C 0x0253 /* 0.0363 * 2^LUX_SCALE */
++#define M3C 0x0363 /* 0.0529 * 2^LUX_SCALE */
++#define K4C 0x010a /* 0.520 * 2^RATIO_SCALE */
++#define B4C 0x0282 /* 0.0392 * 2^LUX_SCALE */
++#define M4C 0x03df /* 0.0605 * 2^LUX_SCALE */
++#define K5C 0x014d /* 0.65 * 2^RATIO_SCALE */
++#define B5C 0x0177 /* 0.0229 * 2^LUX_SCALE */
++#define M5C 0x01dd /* 0.0291 * 2^LUX_SCALE */
++#define K6C 0x019a /* 0.80 * 2^RATIO_SCALE */
++#define B6C 0x0101 /* 0.0157 * 2^LUX_SCALE */
++#define M6C 0x0127 /* 0.0180 * 2^LUX_SCALE */
++#define K7C 0x029a /* 1.3 * 2^RATIO_SCALE */
++#define B7C 0x0037 /* 0.00338 * 2^LUX_SCALE */
++#define M7C 0x002b /* 0.00260 * 2^LUX_SCALE */
++#define K8C 0x029a /* 1.3 * 2^RATIO_SCALE */
++#define B8C 0x0000 /* 0.000 * 2^LUX_SCALE */
++#define M8C 0x0000 /* 0.000 * 2^LUX_SCALE */
++
++/* TSL256x registers definition . */
++enum tsl256x_regs {
++ TSL256X_REG_CONTROL = 0x80, /* Control of basic functions */
++ TSL256X_REG_TIMING = 0x81, /* Integration time/gain control */
++ TSL256X_REG_THRESHLOWLOW = 0x82, /* Low byte of low interrupt threshold */
++ TSL256X_REG_THRESHLOWHIGH = 0x83, /* High byte of low interrupt threshold */
++ TSL256X_REG_THRESHHIGHLOW = 0x84, /* Low byte of high interrupt threshold */
++ TSL256X_REG_THRESHHIGHHIGH = 0x85, /* High byte of high interrupt threshold */
++ TSL256X_REG_INTERRUPT = 0x86, /* Interrupt control */
++ TSL256X_REG_CRC = 0x88, /* Factory test - not a user register */
++ TSL256X_REG_ID = 0x8A, /* Part number/ Rev ID */
++ TSL256X_REG_DATA0LOW = 0x8C, /* Low byte of ADC channel 0 */
++ TSL256X_REG_DATA0HIGH = 0x8D, /* High byte of ADC channel 0 */
++ TSL256X_REG_DATA1LOW = 0x8E, /* Low byte of ADC channel 1 */
++ TSL256X_REG_DATA1HIGH = 0x8F, /* High byte of ADC channel 1 */
++ __NUM_TSL256X_REGS
++};
++
++#endif /* _TSL256X_H */
++
+Index: linux-2.6.21-moko/drivers/i2c/chips/Kconfig
+===================================================================
+--- linux-2.6.21-moko.orig/drivers/i2c/chips/Kconfig
++++ linux-2.6.21-moko/drivers/i2c/chips/Kconfig
+@@ -136,4 +136,14 @@
+ This driver can also be built as a module. If so, the module
+ will be called max6875.
+
++config SENSORS_TSL256X
++ tristate "Texas TSL256X Ambient Light Sensor"
++ depends on I2C
++ help
++ If you say yes here you get support for the Texas TSL256X
++ ambient light sensor chip.
++
++ This driver can also be built as a module. If so, the module
++ will be called tsl256x.
++
+ endmenu
+Index: linux-2.6.21-moko/drivers/i2c/chips/Makefile
+===================================================================
+--- linux-2.6.21-moko.orig/drivers/i2c/chips/Makefile
++++ linux-2.6.21-moko/drivers/i2c/chips/Makefile
+@@ -13,6 +13,7 @@
+ obj-$(CONFIG_SENSORS_PCF8591) += pcf8591.o
+ obj-$(CONFIG_ISP1301_OMAP) += isp1301_omap.o
+ obj-$(CONFIG_TPS65010) += tps65010.o
++obj-$(CONFIG_SENSORS_TSL256X) += tsl256x.o
+
+ ifeq ($(CONFIG_I2C_DEBUG_CHIP),y)
+ EXTRA_CFLAGS += -DDEBUG
+Index: linux-2.6.21-moko/include/linux/i2c-id.h
+===================================================================
+--- linux-2.6.21-moko.orig/include/linux/i2c-id.h
++++ linux-2.6.21-moko/include/linux/i2c-id.h
+@@ -160,6 +160,7 @@
+ #define I2C_DRIVERID_W83L785TS 1047
+ #define I2C_DRIVERID_OV7670 1048 /* Omnivision 7670 camera */
+ #define I2C_DRIVERID_PCF50606 1049
++#define I2C_DRIVERID_TSL256X 1050
+
+ /*
+ * ---- Adapter types ----------------------------------------------------
Modified: trunk/src/target/kernel/patches/series
===================================================================
--- trunk/src/target/kernel/patches/series 2007-05-16 15:16:48 UTC (rev 1969)
+++ trunk/src/target/kernel/patches/series 2007-05-16 15:46:56 UTC (rev 1970)
@@ -35,3 +35,4 @@
hxd8-core.patch
s3c2410_fb-truecolor.patch
s3c2440-nand-disable-hwecc.patch
+hxd8-tsl256x.patch
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