diff options
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/keyboard/mpr121.c | 109 |
1 files changed, 108 insertions, 1 deletions
diff --git a/drivers/input/keyboard/mpr121.c b/drivers/input/keyboard/mpr121.c index 6a723235805d..589d8e7a36d5 100644 --- a/drivers/input/keyboard/mpr121.c +++ b/drivers/input/keyboard/mpr121.c @@ -30,6 +30,56 @@ #include <linux/delay.h> #include <linux/bitops.h> +#ifdef MPR121_DEBUG_THREADHOLD +#include <linux/kthread.h> +#endif + +/* Register definitions */ +#define ELE_TOUCH_STATUS_0_ADDR 0x0 +#define ELE_TOUCH_STATUS_1_ADDR 0X1 +#define MHD_RISING_ADDR 0x2b +#define NHD_RISING_ADDR 0x2c +#define NCL_RISING_ADDR 0x2d +#define FDL_RISING_ADDR 0x2e +#define MHD_FALLING_ADDR 0x2f +#define NHD_FALLING_ADDR 0x30 +#define NCL_FALLING_ADDR 0x31 +#define FDL_FALLING_ADDR 0x32 +#define ELE0_TOUCH_THRESHOLD_ADDR 0x41 +#define ELE0_RELEASE_THRESHOLD_ADDR 0x42 +/* ELE0...ELE11's threshold will set in a loop */ +#define AFE_CONF_ADDR 0x5c +#define FILTER_CONF_ADDR 0x5d + +/* ELECTRODE_CONF: this register is most important register, it + * control how many of electrode is enabled. If you set this register + * to 0x0, it make the sensor going to suspend mode. Other value(low + * bit is non-zero) will make the sensor into Run mode. This register + * should be write at last. + */ +#define ELECTRODE_CONF_ADDR 0x5e +#define ELECTRODE_CONF_QUICK_CHARGE 0x80 + +#define AUTO_CONFIG_CTRL_ADDR 0x7b +/* AUTO_CONFIG_USL: Upper Limit for auto baseline search, this + * register is related to VDD supplied on your board, the value of + * this register is calc by EQ: `((VDD-0.7)/VDD) * 256`. + * AUTO_CONFIG_LSL: Low Limit of auto baseline search. This is 65% of + * USL AUTO_CONFIG_TL: The Traget Level of auto baseline search, This + * is 90% of USL */ +#define AUTO_CONFIG_USL_ADDR 0x7d +#define AUTO_CONFIG_LSL_ADDR 0x7e +#define AUTO_CONFIG_TL_ADDR 0x7f + + +/* Threshold of touch/release trigger */ +#define TOUCH_THRESHOLD 0x08 +#define RELEASE_THRESHOLD 0x05 +/* Mask Button bits of STATUS_0 & STATUS_1 register */ +#define TOUCH_STATUS_MASK 0xfff +/* MPR121 have 12 electrodes */ +#define MPR121_MAX_KEY_COUNT 12 + struct mpr121_touchkey_data { struct i2c_client *client; struct input_dev *input_dev; @@ -58,6 +108,56 @@ static struct mpr121_init_register init_reg_table[] = { {AUTO_CONFIG_CTRL_ADDR, 0x0b}, }; +#ifdef MPR121_DEBUG_THREADHOLD + +#define MPR121_BUF_SIZE 0x2B +#define MPR121_ACTIVE_CHANNELS 13 +static int mpr121_debug_thread(void *arg) +{ + u8 reg_data[MPR121_BUF_SIZE]; + short ele_signal[MPR121_ACTIVE_CHANNELS]; + short ele_base[MPR121_ACTIVE_CHANNELS]; + short ele_delta[MPR121_ACTIVE_CHANNELS]; + int ret; + int i; + struct mpr121_touchkey_data *data = arg; + + struct i2c_client *client = data->client; + + msleep(5000); + printk(KERN_INFO "begin mpr121 debug thread\n"); +begin: + + /* Get the status, ele data and baseline from MPR121 */ + ret = i2c_smbus_read_i2c_block_data(client, ELE_TOUCH_STATUS_0_ADDR, + 32, ®_data[0]); + if (ret < 32) { + dev_err(&client->dev, "i2c block read failed:%d\n", ret); + goto begin; + } + + ret = i2c_smbus_read_i2c_block_data(client, 0x20, 0xb, ®_data[32]); + if (ret < 0xb) { + dev_err(&client->dev, "i2c block read failed:%d\n", ret); + goto begin; + } + + for (i = 0; i < MPR121_ACTIVE_CHANNELS; i++) { + ele_signal[i] = ((short)reg_data[0x04 + (2*i)]) + | (((short)reg_data[0x04 + 1 + (2 * i)]) << 8); + ele_base[i] = ((short)reg_data[i+0x1e])<<2; + ele_delta[i] = ele_base[i]-ele_signal[i]; + printk(KERN_INFO "CH%d: %d, %d, %d ", i, ele_signal[i], + ele_base[i], ele_delta[i]); + } + printk(KERN_INFO "\n"); + + msleep(40); + goto begin; + return 0; +} +#endif + static irqreturn_t mpr_touchkey_interrupt(int irq, void *dev_id) { struct mpr121_touchkey_data *data = dev_id; @@ -104,11 +204,13 @@ static int mpr121_phys_init(struct mpr121_platform_data *pdata, struct mpr121_init_register *reg; unsigned char usl, lsl, tl; int i, t, vdd, ret; + u8 ele_conf; /* setup touch/release threshold for ele0-ele11 */ for (i = 0; i <= MPR121_MAX_KEY_COUNT; i++) { t = ELE0_TOUCH_THRESHOLD_ADDR + (i * 2); ret = i2c_smbus_write_byte_data(client, t, TOUCH_THRESHOLD); + if (ret < 0) goto err_i2c_write; ret = i2c_smbus_write_byte_data(client, t + 1, @@ -137,8 +239,10 @@ static int mpr121_phys_init(struct mpr121_platform_data *pdata, ret = i2c_smbus_write_byte_data(client, AUTO_CONFIG_TL_ADDR, tl); if (ret < 0) goto err_i2c_write; + ele_conf = data->keycount | ELECTRODE_CONF_QUICK_CHARGE; + ret = i2c_smbus_write_byte_data(client, ELECTRODE_CONF_ADDR, - data->keycount); + ele_conf); if (ret < 0) goto err_i2c_write; @@ -221,6 +325,9 @@ static int __devinit mpr_touchkey_probe(struct i2c_client *client, goto err_free_irq; i2c_set_clientdata(client, data); device_init_wakeup(&client->dev, pdata->wakeup); +#ifdef MPR121_DEBUG_THREADHOLD + kthread_run(mpr121_debug_thread, data, "mpr121_debug_thread"); +#endif dev_info(&client->dev, "Mpr121 touch keyboard init success.\n"); return 0; |