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hm801: Implement additional button driver.

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Several HM-801 DAPs have another buttons circuit.
This patch adds support for such devices so they could work properly.

Change-Id: Ic49e8e46b3e785b91c7c4706003fac3dbc20ae59
This commit is contained in:
Andrew Ryabinin 2012-10-17 11:37:55 +04:00
parent 89254cb612
commit 04fb4b77ac
2 changed files with 99 additions and 28 deletions
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7
firmware/target/arm/rk27xx/adc-target.h
View file

@ -25,7 +25,12 @@
#define ADC_BATTERY 0
#define ADC_BUTTONS 1
#define ADC_UNKNOWN 2
/* HiFiMAN HM-801 usually use this channel for second battery,
but some of them use it for buttons.
*/
#define ADC_EXTRA 2
#define ADC_VREF 3 /* that is what datasheet says */
#define ADC_UNREG_POWER ADC_BATTERY /* For compatibility */

120
firmware/target/arm/rk27xx/hm801/button-hm801.c
View file

@ -24,45 +24,111 @@
#include "button.h"
#include "adc.h"
enum keyboard_type_t {
KEYBOARD_V1,
KEYBOARD_V2,
};
static enum keyboard_type_t kbd_type;
void button_init_device(void) {
/* setup button gpio as input */
GPIO_PCCON &= ~(POWEROFF_BUTTON);
/* identify keyboard type */
SCU_IOMUXB_CON &= ~(1<<2);
GPIO_PCCON |= (1<<4);
if (GPIO_PCDR & (1<<4)) {
kbd_type = KEYBOARD_V1;
} else {
kbd_type = KEYBOARD_V2;
}
}
int button_read_device(void) {
static int button_read_device_v1(void) {
int adc_val = adc_read(ADC_BUTTONS);
int button = 0;
if (adc_val < 480) { /* middle */
if (adc_val < 200) { /* 200 - 0 */
if (adc_val < 30) {
button = BUTTON_UP;
} else {
button = BUTTON_RIGHT; /* 30 - 200 */
}
if (adc_val < 200) { /* 0 - 200 */
if (adc_val < 30) {
button = BUTTON_UP;
} else { /* 30 - 200 */
button = BUTTON_RIGHT;
}
} else { /* 200 - 480 */
if (adc_val < 370) {
button = BUTTON_SELECT;
} else {
button = BUTTON_DOWN;
}
}
if (adc_val < 370) { /* 200 - 370 */
button = BUTTON_SELECT;
} else { /* 370 - 480 */
button = BUTTON_DOWN;
}
}
} else { /* > 480 */
if (adc_val < 690) { /* 480 - 690 */
if (adc_val < 580) {
button = BUTTON_LEFT;
} else {
button = BUTTON_NEXT;
}
} else { /* > 680 */
if (adc_val < 840) {
button = BUTTON_PREV;
} else {
if (adc_val < 920) {
button = BUTTON_PLAY;
}
}
}
if (adc_val < 580) { /* 480 - 580 */
button = BUTTON_LEFT;
} else { /* 580 - 690 */
button = BUTTON_NEXT;
}
} else { /* > 680 */
if (adc_val < 840) { /* 680 - 840 */
button = BUTTON_PREV;
} else {
if (adc_val < 920) { /* 840 - 920 */
button = BUTTON_PLAY;
}
}
}
}
return button | (GPIO_PCDR & POWEROFF_BUTTON);
}
static int button_read_device_v2(void) {
int adc_val = adc_read(ADC_BUTTONS);
int adc_val2 = adc_read(ADC_EXTRA);
int button = 0;
/* Buttons on front panel */
if (adc_val < 520) { /* middle */
if (adc_val < 360) { /* 0 - 360 */
if (adc_val < 40) { /* 0 - 40 */
button |= BUTTON_UP;
} else { /* 40 - 360 */
button |= BUTTON_RIGHT;
}
} else { /* 360 - 520 */
button |= BUTTON_SELECT;
}
} else { /* >= 520 */
if (adc_val < 770) { /* 520 - 770 */
if (adc_val < 640) { /* 520 - 640 */
button |= BUTTON_DOWN;
} else { /* 640 - 770 */
button |= BUTTON_LEFT;
}
}
}
/* Buttons on top */
if (adc_val2 < 400) { /* 0 - 400 */
if (adc_val2 < 120) { /* 0 - 120 */
button |= BUTTON_NEXT;
} else { /* 120 - 400 */
button |= BUTTON_PREV;
}
} else { /* >= 400 */
if (adc_val2 < 560) { /* 400 - 560 */
button |= BUTTON_PLAY;
}
}
return button | (GPIO_PCDR & POWEROFF_BUTTON);
}
int button_read_device(void) {
if (kbd_type == KEYBOARD_V1) {
return button_read_device_v1();
} else {
return button_read_device_v2();
}
}