forked from len0rd/rockbox
Button and click wheel driver for iPod 4g and Nano.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8256 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Thom Johansen
parent
a601fb8d19
commit
8bf079ffc1
3 changed files with 185 additions and 4 deletions
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@ -63,6 +63,143 @@ static int button_read(void);
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static bool remote_button_hold_only(void);
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#endif
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#if CONFIG_KEYPAD == IPOD_4G_PAD || CONFIG_KEYPAD == IPOD_NANO_PAD
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/* Variable to use for setting button status in interrupt handler */
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int int_btn = BUTTON_NONE;
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static void opto_i2c_init(void)
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{
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int i, curr_value;
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/* wait for value to settle */
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i = 1000;
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curr_value = (inl(0x7000c104) << 16) >> 24;
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while (i > 0)
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{
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int new_value = (inl(0x7000c104) << 16) >> 24;
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if (new_value != curr_value) {
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i = 10000;
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curr_value = new_value;
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}
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else {
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i--;
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}
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}
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GPIOB_OUTPUT_VAL |= 0x10;
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DEV_EN |= 0x10000;
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DEV_RS |= 0x10000;
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udelay(5);
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DEV_RS &= ~0x10000; /* finish reset */
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outl(0xffffffff, 0x7000c120);
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outl(0xffffffff, 0x7000c124);
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outl(0xc00a1f00, 0x7000c100);
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outl(0x1000000, 0x7000c104);
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}
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static int ipod_4g_button_read(void)
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{
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unsigned reg, status;
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static int clickwheel_down = 0;
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static int old_wheel_value = -1;
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int wheel_keycode = BUTTON_NONE;
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int wheel_delta, wheel_delta_abs;
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int new_wheel_value;
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int btn = BUTTON_NONE;
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udelay(250);
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reg = 0x7000c104;
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if ((inl(0x7000c104) & 0x4000000) != 0) {
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reg = reg + 0x3C; /* 0x7000c140 */
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status = inl(0x7000c140);
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outl(0x0, 0x7000c140); /* clear interrupt status? */
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if ((status & 0x800000ff) == 0x8000001a) {
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/* NB: highest wheel = 0x5F, clockwise increases */
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new_wheel_value = ((status << 9) >> 25) & 0xff;
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if (status & 0x100)
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btn |= BUTTON_SELECT;
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if (status & 0x200)
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btn |= BUTTON_RIGHT;
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if (status & 0x400)
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btn |= BUTTON_LEFT;
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if (status & 0x800)
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btn |= BUTTON_PLAY;
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if (status & 0x1000)
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btn |= BUTTON_MENU;
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if (status & 0x40000000) {
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/* scroll wheel down */
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clickwheel_down = 1;
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backlight_on();
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if (old_wheel_value != -1) {
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wheel_delta = new_wheel_value - old_wheel_value;
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wheel_delta_abs = wheel_delta < 0 ? -wheel_delta : wheel_delta;
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wheel_delta = new_wheel_value - old_wheel_value;
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/* TODO: these thresholds should most definitely be
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settings, and we're probably going to want a more
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advanced scheme than this anyway. */
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if (wheel_delta > 4) {
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wheel_keycode = BUTTON_SCROLL_FWD;
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old_wheel_value = new_wheel_value;
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} else if (wheel_delta < -4) {
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wheel_keycode = BUTTON_SCROLL_BACK;
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old_wheel_value = new_wheel_value;
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}
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if (wheel_keycode != BUTTON_NONE)
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queue_post(&button_queue, wheel_keycode, NULL);
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}
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else {
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old_wheel_value = new_wheel_value;
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}
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}
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else if (clickwheel_down) {
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/* scroll wheel up */
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old_wheel_value = -1;
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clickwheel_down = 0;
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}
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}
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/*
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Don't know why this should be needed, let me know if you do.
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else if ((status & 0x800000FF) == 0x8000003A) {
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wheel_value = status & 0x800000FF;
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}
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*/
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else if (status == 0xffffffff) {
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opto_i2c_init();
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}
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}
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if ((inl(reg) & 0x8000000) != 0) {
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outl(0xffffffff, 0x7000c120);
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outl(0xffffffff, 0x7000c124);
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}
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return btn;
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}
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void ipod_4g_button_int(void)
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{
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PP5020_CPU_HI_INT_CLR = PP5020_I2C_MASK;
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udelay(250);
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outl(0x0, 0x7000c140);
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int_btn = ipod_4g_button_read();
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outl(inl(0x7000c104) | 0xC000000, 0x7000c104);
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outl(0x400a1f00, 0x7000c100);
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GPIOB_OUTPUT_VAL |= 0x10;
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PP5020_CPU_INT_EN = 0x40000000;
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PP5020_CPU_HI_INT_EN = PP5020_I2C_MASK;
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}
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#endif
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static void button_tick(void)
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{
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static int tick = 0;
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@ -234,6 +371,18 @@ void button_init(void)
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/* nothing to initialize here */
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#elif CONFIG_KEYPAD == GMINI100_PAD
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/* nothing to initialize here */
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#elif CONFIG_KEYPAD == IPOD_4G_PAD || CONFIG_KEYPAD == IPOD_NANO_PAD
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opto_i2c_init();
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/* hold button - enable as input */
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GPIOA_ENABLE |= 0x20;
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GPIOA_OUTPUT_EN &= ~0x20;
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/* hold button - set interrupt levels */
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GPIOA_INT_LEV = ~(GPIOA_INPUT_VAL & 0x20);
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GPIOA_INT_CLR = GPIOA_INT_STAT & 0x20;
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/* enable interrupts */
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GPIOA_INT_EN = 0x20;
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PP5020_CPU_INT_EN = 0x40000000;
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PP5020_CPU_HI_INT_EN = PP5020_I2C_MASK;
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#endif /* CONFIG_KEYPAD */
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queue_init(&button_queue);
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@ -673,8 +822,9 @@ static int button_read(void)
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btn |= BUTTON_ON;
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#elif CONFIG_KEYPAD == IPOD_4G_PAD || CONFIG_KEYPAD == IPOD_NANO_PAD
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/* TODO: Implement for iPod */
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(void)data;
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/* The int_btn variable is set in the button interrupt handler */
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btn = int_btn;
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#endif /* CONFIG_KEYPAD */
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@ -26,12 +26,36 @@
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#define GPIOC_ENABLE (*(volatile unsigned long *)(0x6000d008))
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#define GPIOD_ENABLE (*(volatile unsigned long *)(0x6000d00c))
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#define GPIOA_OUTPUT_EN (*(volatile unsigned long *)(0x6000d010))
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#define GPIOB_OUTPUT_EN (*(volatile unsigned long *)(0x6000d014))
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#define GPIOC_OUTPUT_EN (*(volatile unsigned long *)(0x6000d018))
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#define GPIOD_OUTPUT_EN (*(volatile unsigned long *)(0x6000d01c))
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#define GPIOA_OUTPUT_VAL (*(volatile unsigned long *)(0x6000d020))
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#define GPIOB_OUTPUT_VAL (*(volatile unsigned long *)(0x6000d024))
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#define GPIOC_OUTPUT_VAL (*(volatile unsigned long *)(0x6000d028))
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#define GPIOD_OUTPUT_VAL (*(volatile unsigned long *)(0x6000d02c))
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#define GPIOA_INPUT_VAL (*(volatile unsigned long *)(0x6000d030))
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#define GPIOB_INPUT_VAL (*(volatile unsigned long *)(0x6000d034))
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#define GPIOC_INPUT_VAL (*(volatile unsigned long *)(0x6000d038))
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#define GPIOD_INPUT_VAL (*(volatile unsigned long *)(0x6000d03c))
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#define GPIOA_INT_STAT (*(volatile unsigned long *)(0x6000d040))
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#define GPIOB_INT_STAT (*(volatile unsigned long *)(0x6000d044))
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#define GPIOC_INT_STAT (*(volatile unsigned long *)(0x6000d048))
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#define GPIOD_INT_STAT (*(volatile unsigned long *)(0x6000d04c))
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#define GPIOA_INT_EN (*(volatile unsigned long *)(0x6000d050))
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#define GPIOB_INT_EN (*(volatile unsigned long *)(0x6000d054))
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#define GPIOC_INT_EN (*(volatile unsigned long *)(0x6000d058))
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#define GPIOD_INT_EN (*(volatile unsigned long *)(0x6000d05c))
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#define GPIOA_INT_LEV (*(volatile unsigned long *)(0x6000d060))
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#define GPIOB_INT_LEV (*(volatile unsigned long *)(0x6000d064))
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#define GPIOC_INT_LEV (*(volatile unsigned long *)(0x6000d068))
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#define GPIOD_INT_LEV (*(volatile unsigned long *)(0x6000d06c))
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#define GPIOA_INT_CLR (*(volatile unsigned long *)(0x6000d070))
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#define GPIOB_INT_CLR (*(volatile unsigned long *)(0x6000d074))
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#define GPIOC_INT_CLR (*(volatile unsigned long *)(0x6000d078))
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#define GPIOD_INT_CLR (*(volatile unsigned long *)(0x6000d07c))
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#define DEV_RS (*(volatile unsigned long *)(0x60006004))
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#define DEV_EN (*(volatile unsigned long *)(0x6000600c))
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#define PP5020_TIMER1 (*(volatile unsigned long *)(0x60005000))
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#define PP5020_TIMER1_ACK (*(volatile unsigned long *)(0x60005004))
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@ -39,9 +63,13 @@
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#define PP5020_TIMER2_ACK (*(volatile unsigned long *)(0x6000500c))
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#define PP5020_TIMER_STATUS (*(volatile unsigned long *)(0x60005010))
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#define PP5020_CPU_INT_STAT (*(volatile unsigned long*)(0x64004000))
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#define PP5020_CPU_INT_EN (*(volatile unsigned long*)(0x60004024))
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#define PP5020_CPU_INT_STAT (*(volatile unsigned long*)(0x64004000))
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#define PP5020_CPU_HI_INT_STAT (*(volatile unsigned long*)(0x64004100))
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#define PP5020_CPU_INT_EN (*(volatile unsigned long*)(0x60004024))
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#define PP5020_CPU_HI_INT_EN (*(volatile unsigned long*)(0x60004124))
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#define PP5020_CPU_INT_CLR (*(volatile unsigned long*)(0x60004028))
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#define PP5020_CPU_HI_INT_CLR (*(volatile unsigned long*)(0x60004128))
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#define PP5020_TIMER1_IRQ 0
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#define PP5020_TIMER2_IRQ 1
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#define PP5020_I2S_IRQ 10
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@ -1107,11 +1107,14 @@ int system_memory_guard(int newmode)
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#elif CONFIG_CPU==PP5020
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extern void TIMER1(void);
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extern void ipod_4g_button_int(void);
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void irq(void)
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{
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if (PP5020_CPU_INT_STAT & PP5020_TIMER1_MASK)
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TIMER1();
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else if (PP5020_CPU_HI_INT_STAT & PP5020_I2C_MASK)
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ipod_4g_button_int();
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}
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void system_init(void)
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