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imx233: enhance lradc driver with touchscreen specific stuff

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Change-Id: I83759a00257274c0cbde5a78306256abd2c83800
This commit is contained in:
Amaury Pouly 2012-05-19 13:36:23 +02:00
parent 01216c5ad3
commit 55e01b8de4
2 changed files with 104 additions and 5 deletions
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80
firmware/target/arm/imx233/lradc-imx233.c
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@ -22,6 +22,7 @@
#include "system-target.h"
#include "lradc-imx233.h"
#include "kernel-imx233.h"
#include "stdlib.h"
/* channels */
static struct channel_arbiter_t channel_arbiter;
@ -30,6 +31,34 @@ static struct channel_arbiter_t delay_arbiter;
/* battery is very special, dedicate a channel and a delay to it */
static int battery_chan;
static int battery_delay_chan;
/* irq callbacks */
static lradc_irq_fn_t irq_cb[HW_LRADC_NUM_CHANNELS];
#define define_cb(x) \
void INT_LRADC_CH##x(void) \
{ \
INT_LRADC_CH(x); \
}
void INT_LRADC_CH(int chan)
{
if(irq_cb[chan])
irq_cb[chan](chan);
}
define_cb(0)
define_cb(1)
define_cb(2)
define_cb(3)
define_cb(4)
define_cb(5)
define_cb(6)
define_cb(7)
void imx233_lradc_set_channel_irq_callback(int channel, lradc_irq_fn_t cb)
{
irq_cb[channel] = cb;
}
void imx233_lradc_setup_channel(int channel, bool div2, bool acc, int nr_samples, int src)
{
@ -54,9 +83,28 @@ void imx233_lradc_setup_delay(int dchan, int trigger_lradc, int trigger_delays,
delay << HW_LRADC_DELAYx__DELAY_BP;
}
void imx233_lradc_kick_channel(int channel)
void imx233_lradc_clear_channel_irq(int channel)
{
__REG_CLR(HW_LRADC_CTRL1) = HW_LRADC_CTRL1__LRADCx_IRQ(channel);
}
bool imx233_lradc_read_channel_irq(int channel)
{
return HW_LRADC_CTRL1 & HW_LRADC_CTRL1__LRADCx_IRQ(channel);
}
void imx233_lradc_enable_channel_irq(int channel, bool enable)
{
if(enable)
__REG_SET(HW_LRADC_CTRL1) = HW_LRADC_CTRL1__LRADCx_IRQ_EN(channel);
else
__REG_CLR(HW_LRADC_CTRL1) = HW_LRADC_CTRL1__LRADCx_IRQ_EN(channel);
imx233_lradc_clear_channel_irq(channel);
}
void imx233_lradc_kick_channel(int channel)
{
imx233_lradc_clear_channel_irq(channel);
__REG_SET(HW_LRADC_CTRL0) = HW_LRADC_CTRL0__SCHEDULE(channel);
}
@ -68,7 +116,7 @@ void imx233_lradc_kick_delay(int dchan)
void imx233_lradc_wait_channel(int channel)
{
/* wait for completion */
while(!(HW_LRADC_CTRL1 & HW_LRADC_CTRL1__LRADCx_IRQ(channel)))
while(!imx233_lradc_read_channel_irq(channel))
yield();
}
@ -185,7 +233,7 @@ int imx233_lradc_sense_ext_temperature(int chan, int sensor)
/* disable sensor current */
imx233_lradc_set_temp_isrc(sensor, HW_LRADC_CTRL2__TEMP_ISRC__0uA);
return (b - a) / EXT_TEMP_ACC_COUNT;
return (abs(b - a) / EXT_TEMP_ACC_COUNT) * 1104 / 1000;
}
void imx233_lradc_setup_battery_conversion(bool automatic, unsigned long scale_factor)
@ -203,6 +251,32 @@ int imx233_lradc_read_battery_voltage(void)
return __XTRACT(HW_LRADC_CONVERSION, SCALED_BATT_VOLTAGE);
}
void imx233_lradc_setup_touch(bool xminus_enable, bool yminus_enable,
bool xplus_enable, bool yplus_enable, bool touch_detect)
{
__FIELD_SET_CLR(HW_LRADC_CTRL0, XMINUS_ENABLE, xminus_enable);
__FIELD_SET_CLR(HW_LRADC_CTRL0, YMINUS_ENABLE, yminus_enable);
__FIELD_SET_CLR(HW_LRADC_CTRL0, XPLUS_ENABLE, xplus_enable);
__FIELD_SET_CLR(HW_LRADC_CTRL0, YPLUS_ENABLE, yplus_enable);
__FIELD_SET_CLR(HW_LRADC_CTRL0, TOUCH_DETECT_ENABLE, touch_detect);
}
void imx233_lradc_enable_touch_detect_irq(bool enable)
{
__FIELD_SET_CLR(HW_LRADC_CTRL1, TOUCH_DETECT_IRQ_EN, enable);
imx233_lradc_clear_touch_detect_irq();
}
void imx233_lradc_clear_touch_detect_irq(void)
{
__REG_CLR(HW_LRADC_CTRL1) = HW_LRADC_CTRL1__TOUCH_DETECT_IRQ;
}
bool imx233_lradc_read_touch_detect(void)
{
return HW_LRADC_STATUS & HW_LRADC_STATUS__TOUCH_DETECT_RAW;
}
void imx233_lradc_init(void)
{
arbiter_init(&channel_arbiter, HW_LRADC_NUM_CHANNELS);