From b4080ba6521fc6bf8576459acea533a3cc5efed9 Mon Sep 17 00:00:00 2001 From: Rong Dian Date: Thu, 26 Apr 2012 15:04:55 +0800 Subject: [PATCH] ENGR00180647-2: MAX11801: Add adc sample function in DCM mode. add aux adc sample function in dcm mode for max11801 driver on SABRESD_rev.B board. Signed-off-by: Rong Dian --- drivers/input/touchscreen/max11801_ts.c | 286 +++++++++++++++++++----- 1 file changed, 224 insertions(+), 62 deletions(-) diff --git a/drivers/input/touchscreen/max11801_ts.c b/drivers/input/touchscreen/max11801_ts.c index ca88d6823a98..0784687d231b 100755 --- a/drivers/input/touchscreen/max11801_ts.c +++ b/drivers/input/touchscreen/max11801_ts.c @@ -2,7 +2,7 @@ * Driver for MAXI MAX11801 - A Resistive touch screen controller with * i2c interface * - * Copyright (C) 2011 Freescale Semiconductor, Inc. + * Copyright (C) 2011-2012 Freescale Semiconductor, Inc. * Author: Zhang Jiejing * * Based on mcs5000_ts.c @@ -38,6 +38,8 @@ #include #include #include +#include + /* Register Address define */ #define GENERNAL_STATUS_REG 0x00 @@ -53,13 +55,32 @@ #define AUX_MESURE_CONF_REG 0x0a #define OP_MODE_CONF_REG 0x0b +#define Panel_Setup_X (0x69 << 1) +#define Panel_Setup_Y (0x6b << 1) + +#define XY_combined_measurement (0x70 << 1) +#define X_measurement (0x78 << 1) +#define Y_measurement (0x7a << 1) +#define AUX_measurement (0x76 << 1) + /* FIFO is found only in max11800 and max11801 */ #define FIFO_RD_CMD (0x50 << 1) #define MAX11801_FIFO_INT (1 << 2) #define MAX11801_FIFO_OVERFLOW (1 << 3) +#define MAX11801_EDGE_INT (1 << 1) + +#define FIFO_RD_X_MSB (0x52 << 1) +#define FIFO_RD_X_LSB (0x53 << 1) +#define FIFO_RD_Y_MSB (0x54 << 1) +#define FIFO_RD_Y_LSB (0x55 << 1) +#define FIFO_RD_AUX_MSB (0x5a << 1) +#define FIFO_RD_AUX_LSB (0x5b << 1) #define XY_BUFSIZE 4 #define XY_BUF_OFFSET 4 +#define X_BUFSIZE 2 +#define Y_BUFSIZE 2 +#define AUX_BUFSIZE 2 #define MAX11801_MAX_X 0xfff #define MAX11801_MAX_Y 0xfff @@ -83,6 +104,57 @@ struct max11801_data { struct i2c_client *client; struct input_dev *input_dev; }; +struct i2c_client *max11801_client; +unsigned int max11801_workmode; + +static int max11801_dcm_write_command(struct i2c_client *client, int command) +{ + return i2c_smbus_write_byte(client, command); +} + +static u32 max11801_dcm_sample_aux(struct i2c_client *client) +{ + u8 temp_buf; + u8 aux_buf[AUX_BUFSIZE]; + int ret; + int aux = 0; + u32 sample_data = 0; + /* AUX_measurement*/ + max11801_dcm_write_command(client, AUX_measurement); + mdelay(5); + ret = i2c_smbus_read_i2c_block_data(client, FIFO_RD_AUX_MSB, + 1, &temp_buf); + aux_buf[0] = temp_buf; + if (ret < 1) + printk(KERN_DEBUG "FIFO_RD_AUX_MSB read fails\n"); + mdelay(5); + ret = i2c_smbus_read_i2c_block_data(client, FIFO_RD_AUX_LSB, + 1, &temp_buf); + aux_buf[1] = temp_buf; + if (ret < 1) + printk(KERN_DEBUG "FIFO_RD_AUX_LSB read fails\n"); + aux = (aux_buf[0] << 4) + + (aux_buf[1] >> 4); + printk(KERN_DEBUG "aux: %4x\n", aux); + /* + voltage = (9170*aux)/7371; + voltage is (26.2*3150*aux)/(16.2*0xFFF) + V(aux)=3150*sample/0xFFF,V(battery)=212*V(aux)/81 + sample_data = (14840*aux)/7371-1541; + */ + sample_data = (14840*aux)/7371; + pr_debug("FIFO_RD_AUX_MSB: %2x,FIFO_RD_AUX_LSB: %2x\n", + aux_buf[0], aux_buf[1]); + return sample_data; +} + +u32 max11801_read_adc(void) +{ + u32 adc_data; + adc_data = max11801_dcm_sample_aux(max11801_client); + return adc_data; +} +EXPORT_SYMBOL_GPL(max11801_read_adc); static u8 read_register(struct i2c_client *client, int addr) { @@ -109,76 +181,166 @@ static irqreturn_t max11801_ts_interrupt(int irq, void *dev_id) struct i2c_client *client = data->client; int status, i, ret; u8 buf[XY_BUFSIZE]; + u8 x_buf[X_BUFSIZE]; + u8 y_buf[Y_BUFSIZE]; + u8 temp_buf[1]; int x = -1; int y = -1; status = read_register(data->client, GENERNAL_STATUS_REG); - - if (status & (MAX11801_FIFO_INT | MAX11801_FIFO_OVERFLOW)) { - status = read_register(data->client, GENERNAL_STATUS_REG); - - ret = i2c_smbus_read_i2c_block_data(client, FIFO_RD_CMD, - XY_BUFSIZE, buf); - - /* - * We should get 4 bytes buffer that contains X,Y - * and event tag - */ - if (ret < XY_BUFSIZE) - goto out; - - for (i = 0; i < XY_BUFSIZE; i += XY_BUFSIZE / 2) { - if ((buf[i + 1] & MEASURE_TAG_MASK) == MEASURE_X_TAG) - x = (buf[i] << XY_BUF_OFFSET) + - (buf[i + 1] >> XY_BUF_OFFSET); - else if ((buf[i + 1] & MEASURE_TAG_MASK) == MEASURE_Y_TAG) - y = (buf[i] << XY_BUF_OFFSET) + - (buf[i + 1] >> XY_BUF_OFFSET); - } - - if ((buf[1] & EVENT_TAG_MASK) != (buf[3] & EVENT_TAG_MASK)) - goto out; - - switch (buf[1] & EVENT_TAG_MASK) { - case EVENT_INIT: - /* fall through */ - case EVENT_MIDDLE: - calibration_pointer(&x, &y); - input_report_abs(data->input_dev, ABS_X, x); - input_report_abs(data->input_dev, ABS_Y, y); - input_event(data->input_dev, EV_KEY, BTN_TOUCH, 1); - input_sync(data->input_dev); - break; - - case EVENT_RELEASE: - input_event(data->input_dev, EV_KEY, BTN_TOUCH, 0); - input_sync(data->input_dev); - break; - - case EVENT_FIFO_END: - break; - } - } + if (max11801_workmode == 0) { + if (status & (MAX11801_FIFO_INT | MAX11801_FIFO_OVERFLOW)) { + status = read_register(data->client, GENERNAL_STATUS_REG); + + ret = i2c_smbus_read_i2c_block_data(client, FIFO_RD_CMD, + XY_BUFSIZE, buf); + + /* + * We should get 4 bytes buffer that contains X,Y + * and event tag + */ + if (ret < XY_BUFSIZE) + goto out; + + for (i = 0; i < XY_BUFSIZE; i += XY_BUFSIZE / 2) { + if ((buf[i + 1] & MEASURE_TAG_MASK) == MEASURE_X_TAG) + x = (buf[i] << XY_BUF_OFFSET) + + (buf[i + 1] >> XY_BUF_OFFSET); + else if ((buf[i + 1] & MEASURE_TAG_MASK) == MEASURE_Y_TAG) + y = (buf[i] << XY_BUF_OFFSET) + + (buf[i + 1] >> XY_BUF_OFFSET); + } + + if ((buf[1] & EVENT_TAG_MASK) != (buf[3] & EVENT_TAG_MASK)) + goto out; + + switch (buf[1] & EVENT_TAG_MASK) { + case EVENT_INIT: + /* fall through */ + case EVENT_MIDDLE: + calibration_pointer(&x, &y); + input_report_abs(data->input_dev, ABS_X, x); + input_report_abs(data->input_dev, ABS_Y, y); + input_event(data->input_dev, EV_KEY, BTN_TOUCH, 1); + input_sync(data->input_dev); + break; + + case EVENT_RELEASE: + input_event(data->input_dev, EV_KEY, BTN_TOUCH, 0); + input_sync(data->input_dev); + break; + + case EVENT_FIFO_END: + break; + } + } out: - return IRQ_HANDLED; +return IRQ_HANDLED; + } + else if (max11801_workmode == 1) { + if (status & (MAX11801_EDGE_INT)) { + status = read_register(data->client, GENERNAL_STATUS_REG); + + /* X = panel setup*/ + max11801_dcm_write_command(client, Panel_Setup_X); + /* X_measurement*/ + max11801_dcm_write_command(client, X_measurement); + ret = i2c_smbus_read_i2c_block_data(client, FIFO_RD_X_MSB, + 1, temp_buf); + x_buf[0] = temp_buf[0]; + if (ret < 1) + goto out2; + ret = i2c_smbus_read_i2c_block_data(client, FIFO_RD_X_LSB, + 1, temp_buf); + x_buf[1] = temp_buf[0]; + if (ret < 1) + goto out2; + /* Y = panel setup*/ + max11801_dcm_write_command(client, Panel_Setup_Y); + /* Y_measurement*/ + max11801_dcm_write_command(client, Y_measurement); + ret = i2c_smbus_read_i2c_block_data(client, FIFO_RD_Y_MSB, + 1, temp_buf); + y_buf[0] = temp_buf[0]; + if (ret < 1) + goto out2; + ret = i2c_smbus_read_i2c_block_data(client, FIFO_RD_Y_LSB, + 1, temp_buf); + y_buf[1] = temp_buf[0]; + if (ret < 1) + goto out2; + + if ((x_buf[1] & MEASURE_TAG_MASK) == MEASURE_X_TAG) + x = (x_buf[0] << XY_BUF_OFFSET) + + (x_buf[1] >> XY_BUF_OFFSET); + if ((y_buf[1] & MEASURE_TAG_MASK) == MEASURE_Y_TAG) + y = (y_buf[0] << XY_BUF_OFFSET) + + (y_buf[1] >> XY_BUF_OFFSET); + + if ((x_buf[1] & EVENT_TAG_MASK) != (y_buf[1] & EVENT_TAG_MASK)) + goto out2; + + switch (x_buf[1] & EVENT_TAG_MASK) { + case EVENT_INIT: + /* fall through */ + case EVENT_MIDDLE: + calibration_pointer(&x, &y); + input_report_abs(data->input_dev, ABS_X, x); + input_report_abs(data->input_dev, ABS_Y, y); + input_event(data->input_dev, EV_KEY, BTN_TOUCH, 1); + input_sync(data->input_dev); + break; + + case EVENT_RELEASE: + input_event(data->input_dev, EV_KEY, BTN_TOUCH, 0); + input_sync(data->input_dev); + break; + + case EVENT_FIFO_END: + break; + } + } + } +out2: +return IRQ_HANDLED; } static void __devinit max11801_ts_phy_init(struct max11801_data *data) { struct i2c_client *client = data->client; - - /* Average X,Y, take 16 samples, average eight media sample */ - max11801_write_reg(client, MESURE_AVER_CONF_REG, 0xff); - /* X,Y panel setup time set to 20us */ - max11801_write_reg(client, PANEL_SETUPTIME_CONF_REG, 0x11); - /* Rough pullup time (2uS), Fine pullup time (10us) */ - max11801_write_reg(client, TOUCH_DETECT_PULLUP_CONF_REG, 0x10); - /* Auto mode init period = 5ms , scan period = 5ms*/ - max11801_write_reg(client, AUTO_MODE_TIME_CONF_REG, 0xaa); - /* Aperture X,Y set to +- 4LSB */ - max11801_write_reg(client, APERTURE_CONF_REG, 0x33); - /* Enable Power, enable Automode, enable Aperture, enable Average X,Y */ - max11801_write_reg(client, OP_MODE_CONF_REG, 0x36); + max11801_client = client; + if (max11801_workmode == 0) { + /* Average X,Y, take 16 samples, average eight media sample */ + max11801_write_reg(client, MESURE_AVER_CONF_REG, 0xff); + /* X,Y panel setup time set to 20us */ + max11801_write_reg(client, PANEL_SETUPTIME_CONF_REG, 0x11); + /* Rough pullup time (2uS), Fine pullup time (10us) */ + max11801_write_reg(client, TOUCH_DETECT_PULLUP_CONF_REG, 0x10); + /* Auto mode init period = 5ms , scan period = 5ms*/ + max11801_write_reg(client, AUTO_MODE_TIME_CONF_REG, 0xaa); + /* Aperture X,Y set to +- 4LSB */ + max11801_write_reg(client, APERTURE_CONF_REG, 0x33); + /* Enable Power, enable Automode, enable Aperture, enable Average X,Y */ + max11801_write_reg(client, OP_MODE_CONF_REG, 0x36); + } + if (max11801_workmode == 1) { + /* Average X,Y, take 16 samples, average eight media sample */ + max11801_write_reg(client, MESURE_AVER_CONF_REG, 0xff); + /* X,Y panel setup time set to 20us */ + max11801_write_reg(client, PANEL_SETUPTIME_CONF_REG, 0x11); + /* Rough pullup time (2uS), Fine pullup time (10us) */ + max11801_write_reg(client, TOUCH_DETECT_PULLUP_CONF_REG, 0x10); + /* Auto mode init period = 5ms , scan period = 5ms*/ + max11801_write_reg(client, AUTO_MODE_TIME_CONF_REG, 0xaa); + /* Aperture X,Y set to +- 4LSB */ + max11801_write_reg(client, APERTURE_CONF_REG, 0x33); + /* Enable Power, enable Direct conversion mode , enable Aperture, enable Average X,Y */ + max11801_write_reg(client, OP_MODE_CONF_REG, 0x16); + /* Delay initial=1ms, Sampling time 2us ,Averaging sample depth 2 samples, Resolution 12bit */ + max11801_write_reg(client, AUX_MESURE_CONF_REG, 0x76); + /* Use edge interrupt with direct conversion mode */ + max11801_write_reg(client, GENERNAL_CONF_REG, 0xf3); + } } static int __devinit max11801_ts_probe(struct i2c_client *client, @@ -195,7 +357,7 @@ static int __devinit max11801_ts_probe(struct i2c_client *client, error = -ENOMEM; goto err_free_mem; } - + max11801_workmode = *(int *)(client->dev).platform_data; data->client = client; data->input_dev = input_dev; -- 2.39.5