diff options
Diffstat (limited to 'src/target/firmware/calypso/keypad.c')
| -rw-r--r-- | src/target/firmware/calypso/keypad.c | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/src/target/firmware/calypso/keypad.c b/src/target/firmware/calypso/keypad.c new file mode 100644 index 00000000..27f48c0b --- /dev/null +++ b/src/target/firmware/calypso/keypad.c @@ -0,0 +1,165 @@ +/* Driver for the keypad attached to the TI Calypso */ + +/* (C) 2010 by roh <roh@hyte.de> + * + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + * + */ + +#include <stdint.h> +#include <stdio.h> + +#include <debug.h> +#include <delay.h> +#include <memory.h> +#include <keypad.h> + +#include <calypso/irq.h> +#include <abb/twl3025.h> + + +#define KBR_LATCH_REG 0xfffe480a +#define KBC_REG 0xfffe480c +#define KBD_GPIO_INT 0xfffe4816 +#define KBD_GPIO_MASKIT 0xfffe4818 + +static key_handler_t key_handler = NULL; + +void emit_key(uint8_t key, uint8_t state) +{ + printf("key=%u %s\n", key, state == PRESSED ? "pressed" : "released"); + + if (state == RELEASED) + if (key == KEY_POWER) + twl3025_power_off(); + + if(key_handler) { + key_handler(key, state); + } +} + +volatile uint32_t lastbuttons; + +#define BTN_TO_KEY(name) \ + ((diff & BTN_##name) == BTN_##name) \ + { \ + key = KEY_##name; \ + diff = diff & ~BTN_##name; \ + } + +void dispatch_buttons(uint32_t buttons) +{ + uint8_t state; + + if (buttons == lastbuttons) + return; + + if (buttons > lastbuttons) + state = PRESSED; + else + state = RELEASED; + + uint32_t diff = buttons ^ lastbuttons; + uint8_t key=KEY_INV; + + while (diff != 0) + { + if BTN_TO_KEY(POWER) + else if BTN_TO_KEY(0) + else if BTN_TO_KEY(1) + else if BTN_TO_KEY(2) + else if BTN_TO_KEY(3) + else if BTN_TO_KEY(4) + else if BTN_TO_KEY(5) + else if BTN_TO_KEY(6) + else if BTN_TO_KEY(7) + else if BTN_TO_KEY(8) + else if BTN_TO_KEY(9) + else if BTN_TO_KEY(STAR) + else if BTN_TO_KEY(HASH) + else if BTN_TO_KEY(MENU) + else if BTN_TO_KEY(LEFT_SB) + else if BTN_TO_KEY(RIGHT_SB) + else if BTN_TO_KEY(UP) + else if BTN_TO_KEY(DOWN) + else if BTN_TO_KEY(LEFT) + else if BTN_TO_KEY(RIGHT) + else if BTN_TO_KEY(OK) + else + { + printf("\nunknown keycode: 0x%08x\n", diff); + break; + } + if ( key == KEY_POWER ) + diff = 0; + emit_key(key, state); + } + lastbuttons = buttons; +} + +static void keypad_irq(enum irq_nr nr) +{ + keypad_scan(); +} + +void keypad_init() +{ + lastbuttons = 0; + writew(0, KBD_GPIO_MASKIT); + writew(0, KBC_REG); + + irq_register_handler(IRQ_KEYPAD_GPIO, &keypad_irq); + irq_config(IRQ_KEYPAD_GPIO, 0, 0, 0); + irq_enable(IRQ_KEYPAD_GPIO); +} + +void keypad_set_handler(key_handler_t handler) +{ + key_handler = handler; +} + +void keypad_scan() +{ + uint16_t reg; + uint16_t col; + uint32_t buttons; + +// putchar('\n'); + buttons = 0x0; + //scan for BTN_POWER + writew(0xff, KBC_REG); + delay_ms(1); + reg = readw(KBR_LATCH_REG); +// printd("%02x ", (~reg & 0x1f)); + buttons = buttons | ((~reg & 0x1f) << 20 ); + + //scan for muxed keys if not powerbtn + if ((~reg & 0x1f) != 0x10) + for (col=0;col<4;col++) + { + writew(0x1f & ~(0x1 << col ), KBC_REG); + delay_ms(1); + reg = readw(KBR_LATCH_REG); + buttons = buttons | ((~reg & 0x1f) << (col * 5 )); +// printd("%02x ", (~reg & 0x1f)); + } + //enable keypad irq via master 'or' gate (needs col lines low in idle to work) + writew(0, KBC_REG); + dispatch_buttons(buttons); + +} + |