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author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2012-07-25 07:43:04 +0200 |
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committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2012-07-25 07:43:04 +0200 |
commit | 314820c9e892d8f41ba4db300ec96770d9c8294b (patch) | |
tree | 3d5c59a429239b180c77e57f998a78d3f2b79827 /drivers/input/keyboard/nomadik-ske-keypad.c | |
parent | Input: xpad - add Andamiro Pump It Up pad (diff) | |
parent | Input: add MELFAS mms114 touchscreen driver (diff) | |
download | linux-314820c9e892d8f41ba4db300ec96770d9c8294b.tar.xz linux-314820c9e892d8f41ba4db300ec96770d9c8294b.zip |
Merge branch 'next' into for-linus
Diffstat (limited to 'drivers/input/keyboard/nomadik-ske-keypad.c')
-rw-r--r-- | drivers/input/keyboard/nomadik-ske-keypad.c | 76 |
1 files changed, 48 insertions, 28 deletions
diff --git a/drivers/input/keyboard/nomadik-ske-keypad.c b/drivers/input/keyboard/nomadik-ske-keypad.c index 4ea4341a68c5..a880e7414202 100644 --- a/drivers/input/keyboard/nomadik-ske-keypad.c +++ b/drivers/input/keyboard/nomadik-ske-keypad.c @@ -49,6 +49,7 @@ #define SKE_ASR3 0x2C #define SKE_NUM_ASRX_REGISTERS (4) +#define KEY_PRESSED_DELAY 10 /** * struct ske_keypad - data structure used by keypad driver @@ -92,7 +93,7 @@ static void ske_keypad_set_bits(struct ske_keypad *keypad, u16 addr, static int __init ske_keypad_chip_init(struct ske_keypad *keypad) { u32 value; - int timeout = 50; + int timeout = keypad->board->debounce_ms; /* check SKE_RIS to be 0 */ while ((readl(keypad->reg_base + SKE_RIS) != 0x00000000) && timeout--) @@ -135,12 +136,37 @@ static int __init ske_keypad_chip_init(struct ske_keypad *keypad) return 0; } -static void ske_keypad_read_data(struct ske_keypad *keypad) +static void ske_keypad_report(struct ske_keypad *keypad, u8 status, int col) { + int row = 0, code, pos; struct input_dev *input = keypad->input; - u16 status; - int col = 0, row = 0, code; - int ske_asr, ske_ris, key_pressed, i; + u32 ske_ris; + int key_pressed; + int num_of_rows; + + /* find out the row */ + num_of_rows = hweight8(status); + do { + pos = __ffs(status); + row = pos; + status &= ~(1 << pos); + + code = MATRIX_SCAN_CODE(row, col, SKE_KEYPAD_ROW_SHIFT); + ske_ris = readl(keypad->reg_base + SKE_RIS); + key_pressed = ske_ris & SKE_KPRISA; + + input_event(input, EV_MSC, MSC_SCAN, code); + input_report_key(input, keypad->keymap[code], key_pressed); + input_sync(input); + num_of_rows--; + } while (num_of_rows); +} + +static void ske_keypad_read_data(struct ske_keypad *keypad) +{ + u8 status; + int col = 0; + int ske_asr, i; /* * Read the auto scan registers @@ -154,44 +180,38 @@ static void ske_keypad_read_data(struct ske_keypad *keypad) if (!ske_asr) continue; - /* now that ASRx is zero, find out the column x and row y*/ - if (ske_asr & 0xff) { + /* now that ASRx is zero, find out the coloumn x and row y */ + status = ske_asr & 0xff; + if (status) { col = i * 2; - status = ske_asr & 0xff; - } else { + ske_keypad_report(keypad, status, col); + } + status = (ske_asr & 0xff00) >> 8; + if (status) { col = (i * 2) + 1; - status = (ske_asr & 0xff00) >> 8; + ske_keypad_report(keypad, status, col); } - - /* find out the row */ - row = __ffs(status); - - code = MATRIX_SCAN_CODE(row, col, SKE_KEYPAD_ROW_SHIFT); - ske_ris = readl(keypad->reg_base + SKE_RIS); - key_pressed = ske_ris & SKE_KPRISA; - - input_event(input, EV_MSC, MSC_SCAN, code); - input_report_key(input, keypad->keymap[code], key_pressed); - input_sync(input); } } static irqreturn_t ske_keypad_irq(int irq, void *dev_id) { struct ske_keypad *keypad = dev_id; - int retries = 20; + int timeout = keypad->board->debounce_ms; /* disable auto scan interrupt; mask the interrupt generated */ ske_keypad_set_bits(keypad, SKE_IMSC, ~SKE_KPIMA, 0x0); ske_keypad_set_bits(keypad, SKE_ICR, 0x0, SKE_KPICA); - while ((readl(keypad->reg_base + SKE_CR) & SKE_KPASON) && --retries) - msleep(5); + while ((readl(keypad->reg_base + SKE_CR) & SKE_KPASON) && --timeout) + cpu_relax(); - if (retries) { - /* SKEx registers are stable and can be read */ - ske_keypad_read_data(keypad); - } + /* SKEx registers are stable and can be read */ + ske_keypad_read_data(keypad); + + /* wait until raw interrupt is clear */ + while ((readl(keypad->reg_base + SKE_RIS)) && --timeout) + msleep(KEY_PRESSED_DELAY); /* enable auto scan interrupts */ ske_keypad_set_bits(keypad, SKE_IMSC, 0x0, SKE_KPIMA); |