/*
* Read a sample from the WM9705 adc in polling mode.
*/
static int wm9705_poll_sample(struct wm97xx *wm, int adcsel, int *sample)
{
int timeout = 5 * delay;
if (!wm->pen_probably_down) {
u16 data = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
if (!(data & WM97XX_PEN_DOWN))
return RC_PENUP;
wm->pen_probably_down = 1;
}
/* set up digitiser */
if (adcsel & 0x8000)
adcsel = ((adcsel & 0x7fff) + 3) << 12;
if (wm->mach_ops && wm->mach_ops->pre_sample)
wm->mach_ops->pre_sample(adcsel);
wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1,
adcsel | WM97XX_POLL | WM97XX_DELAY(delay));
/* wait 3 AC97 time slots + delay for conversion */
poll_delay(delay);
/* wait for POLL to go low */
while ((wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER1) & WM97XX_POLL)
&& timeout) {
udelay(AC97_LINK_FRAME);
timeout--;
}
if (timeout == 0) {
/* If PDEN is set, we can get a timeout when pen goes up */
if (is_pden(wm))
wm->pen_probably_down = 0;
else
dev_dbg(wm->dev, "adc sample timeout");
return RC_PENUP;
}
*sample = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
if (wm->mach_ops && wm->mach_ops->post_sample)
wm->mach_ops->post_sample(adcsel);
/* check we have correct sample */
if ((*sample & WM97XX_ADCSEL_MASK) != adcsel) {
dev_dbg(wm->dev, "adc wrong sample, read %x got %x", adcsel,
*sample & WM97XX_ADCSEL_MASK);
return RC_PENUP;
}
if (!(*sample & WM97XX_PEN_DOWN)) {
wm->pen_probably_down = 0;
return RC_PENUP;
}
return RC_VALID;
}
static int wm9712_poll_sample(struct wm97xx *wm, int adcsel, int *sample)
{
int timeout = 5 * delay;
if (!wm->pen_probably_down) {
u16 data = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
if (!(data & WM97XX_PEN_DOWN))
return RC_PENUP;
wm->pen_probably_down = 1;
}
if (adcsel & 0x8000)
adcsel = ((adcsel & 0x7fff) + 3) << 12;
if (wm->mach_ops && wm->mach_ops->pre_sample)
wm->mach_ops->pre_sample(adcsel);
wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1,
adcsel | WM97XX_POLL | WM97XX_DELAY(delay));
poll_delay(delay);
while ((wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER1) & WM97XX_POLL)
&& timeout) {
udelay(AC97_LINK_FRAME);
timeout--;
}
if (timeout <= 0) {
if (is_pden(wm))
wm->pen_probably_down = 0;
else
dev_dbg(wm->dev, "adc sample timeout");
return RC_PENUP;
}
*sample = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
if (wm->mach_ops && wm->mach_ops->post_sample)
wm->mach_ops->post_sample(adcsel);
if ((*sample & WM97XX_ADCSEL_MASK) != adcsel) {
dev_dbg(wm->dev, "adc wrong sample, read %x got %x", adcsel,
*sample & WM97XX_ADCSEL_MASK);
return RC_PENUP;
}
if (!(*sample & WM97XX_PEN_DOWN)) {
wm->pen_probably_down = 0;
return RC_PENUP;
}
return RC_VALID;
}
static int rt5611_ts_poll_coord(struct rt5611_ts *rt, struct rt5611_ts_data *data)
{
bool FoundXSample = 0, FoundYSample = 0, FoundPSample = 0;
u16 val = 0;
u8 i = 0;
RT5611_TS_DEBUG("rt5611_ts_poll_coord\n");
data->x = MAX_ADC_VAL;
data->y = MAX_ADC_VAL;
data->p = MAX_ADC_VAL;
poll_delay(delay_sel);
for (i = 0; i < MAX_CONVERSIONS; i++) {
val = rt5611_ts_reg_read(rt, RT_TP_INDICATION);
if (!(val & CB3_PD_STATUS))
return RC_PENUP;
if (!FoundXSample && ((val&CB3_ADCSRC_MASK) == CB3_ADCSRC_X)) {
data->x = val & CB3_ADC_DATA; /* get X sample */
FoundXSample = 1;
} else if (!FoundYSample && ((val&CB3_ADCSRC_MASK) == CB3_ADCSRC_Y)) {
data->y = val & CB3_ADC_DATA; /* get Y sample */
FoundYSample = 1;
} else if (!FoundPSample && ((val&CB3_ADCSRC_MASK) == CB3_ADCSRC_PRE)) {
data->p = val & CB3_ADC_DATA; /* get Presure sample */
FoundPSample = 1;
} else if ((val&CB3_ADCSRC_MASK) == CB3_ADCSRC_NON) {
//when busy, using a smaller delay
udelay(100);
continue;
}
if (FoundXSample && FoundYSample && FoundPSample)
break;
/*wait some delay- delay for conversion */
poll_delay(delay_sel);
}
if (i == MAX_CONVERSIONS)
return RC_AGAIN;
else
return RC_VALID;
}
static int wm9712_poll_coord(struct wm97xx *wm, struct wm97xx_data *data)
{
int timeout = 5 * delay;
if (!wm->pen_probably_down) {
u16 data_rd = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
if (!(data_rd & WM97XX_PEN_DOWN))
return RC_PENUP;
wm->pen_probably_down = 1;
}
if (wm->mach_ops && wm->mach_ops->pre_sample)
wm->mach_ops->pre_sample(WM97XX_ADCSEL_X | WM97XX_ADCSEL_Y);
wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1,
WM97XX_COO | WM97XX_POLL | WM97XX_DELAY(delay));
poll_delay(delay);
data->x = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
while ((wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER1) & WM97XX_POLL)
&& timeout) {
udelay(AC97_LINK_FRAME);
timeout--;
}
if (timeout <= 0) {
if (is_pden(wm))
wm->pen_probably_down = 0;
else
dev_dbg(wm->dev, "adc sample timeout");
return RC_PENUP;
}
data->y = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
if (pil)
data->p = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
else
data->p = DEFAULT_PRESSURE;
if (wm->mach_ops && wm->mach_ops->post_sample)
wm->mach_ops->post_sample(WM97XX_ADCSEL_X | WM97XX_ADCSEL_Y);
if (!(data->x & WM97XX_ADCSEL_X) || !(data->y & WM97XX_ADCSEL_Y))
goto err;
if (pil && !(data->p & WM97XX_ADCSEL_PRES))
goto err;
if (!(data->x & WM97XX_PEN_DOWN) || !(data->y & WM97XX_PEN_DOWN)) {
wm->pen_probably_down = 0;
return RC_PENUP;
}
return RC_VALID;
err:
return 0;
}
/*
* Read a coord from the WM9712 adc in polling mode.
*/
static int wm9712_poll_coord(struct wm97xx *wm, struct wm97xx_data *data)
{
int timeout = 5 * delay;
if (!wm->pen_probably_down) {
u16 data_rd = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
if (!(data_rd & WM97XX_PEN_DOWN))
return RC_PENUP;
wm->pen_probably_down = 1;
}
/* set up digitiser */
if (wm->mach_ops && wm->mach_ops->pre_sample)
wm->mach_ops->pre_sample(WM97XX_ADCSEL_X | WM97XX_ADCSEL_Y);
wm97xx_reg_write(wm, AC97_WM97XX_DIGITISER1,
WM97XX_COO | WM97XX_POLL | WM97XX_DELAY(delay));
/* wait 3 AC97 time slots + delay for conversion and read x */
poll_delay(delay);
data->x = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
/* wait for POLL to go low */
while ((wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER1) & WM97XX_POLL)
&& timeout) {
udelay(AC97_LINK_FRAME);
timeout--;
}
if (timeout <= 0) {
/* If PDEN is set, we can get a timeout when pen goes up */
if (is_pden(wm))
wm->pen_probably_down = 0;
else
dev_dbg(wm->dev, "adc sample timeout");
return RC_PENUP;
}
/* read back y data */
data->y = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
if (pil)
data->p = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
else
data->p = DEFAULT_PRESSURE;
if (wm->mach_ops && wm->mach_ops->post_sample)
wm->mach_ops->post_sample(WM97XX_ADCSEL_X | WM97XX_ADCSEL_Y);
/* check we have correct sample */
if (!(data->x & WM97XX_ADCSEL_X) || !(data->y & WM97XX_ADCSEL_Y))
goto err;
if (pil && !(data->p & WM97XX_ADCSEL_PRES))
goto err;
if (!(data->x & WM97XX_PEN_DOWN) || !(data->y & WM97XX_PEN_DOWN)) {
wm->pen_probably_down = 0;
return RC_PENUP;
}
return RC_VALID;
err:
return 0;
}
