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-rw-r--r--drivers/input/keyboard/pxa27x_keypad.c163
-rw-r--r--include/asm-arm/arch-pxa/pxa27x_keypad.h30
2 files changed, 164 insertions, 29 deletions
diff --git a/drivers/input/keyboard/pxa27x_keypad.c b/drivers/input/keyboard/pxa27x_keypad.c
index e9d4e227a00..cd25b341449 100644
--- a/drivers/input/keyboard/pxa27x_keypad.c
+++ b/drivers/input/keyboard/pxa27x_keypad.c
@@ -41,6 +41,9 @@
#define KPC_MKCN(n) ((((n) & 0x7) - 1) << 23) /* matrix key column number */
#define KPC_DKN(n) ((((n) & 0x7) - 1) << 6) /* direct key number */
+#define KPDK_DKP (0x1 << 31)
+#define KPDK_DK(n) ((n) & 0xff)
+
#define KPAS_MUKP(n) (((n) >> 26) & 0x1f)
#define KPAS_RP(n) (((n) >> 4) & 0xf)
#define KPAS_CP(n) ((n) & 0xf)
@@ -60,6 +63,13 @@ struct pxa27x_keypad {
/* state row bits of each column scan */
uint32_t matrix_key_state[MAX_MATRIX_KEY_COLS];
+ uint32_t direct_key_state;
+
+ unsigned int direct_key_mask;
+
+ int rotary_rel_code[2];
+ int rotary_up_key[2];
+ int rotary_down_key[2];
};
static void pxa27x_keypad_build_keycode(struct pxa27x_keypad *keypad)
@@ -78,6 +88,25 @@ static void pxa27x_keypad_build_keycode(struct pxa27x_keypad *keypad)
keypad->matrix_keycodes[(row << 3) + col] = code;
set_bit(code, input_dev->keybit);
}
+
+ keypad->rotary_up_key[0] = pdata->rotary0_up_key;
+ keypad->rotary_up_key[1] = pdata->rotary1_up_key;
+ keypad->rotary_down_key[0] = pdata->rotary0_down_key;
+ keypad->rotary_down_key[1] = pdata->rotary1_down_key;
+ keypad->rotary_rel_code[0] = pdata->rotary0_rel_code;
+ keypad->rotary_rel_code[1] = pdata->rotary1_rel_code;
+
+ if (pdata->rotary0_up_key && pdata->rotary0_down_key) {
+ set_bit(pdata->rotary0_up_key, input_dev->keybit);
+ set_bit(pdata->rotary0_down_key, input_dev->keybit);
+ } else
+ set_bit(pdata->rotary0_rel_code, input_dev->relbit);
+
+ if (pdata->rotary1_up_key && pdata->rotary1_down_key) {
+ set_bit(pdata->rotary1_up_key, input_dev->keybit);
+ set_bit(pdata->rotary1_down_key, input_dev->keybit);
+ } else
+ set_bit(pdata->rotary1_rel_code, input_dev->relbit);
}
static inline unsigned int lookup_matrix_keycode(
@@ -151,35 +180,92 @@ scan:
#define DEFAULT_KPREC (0x007f007f)
+static inline int rotary_delta(uint32_t kprec)
+{
+ if (kprec & KPREC_OF0)
+ return (kprec & 0xff) + 0x7f;
+ else if (kprec & KPREC_UF0)
+ return (kprec & 0xff) - 0x7f - 0xff;
+ else
+ return (kprec & 0xff) - 0x7f;
+}
+
+static void report_rotary_event(struct pxa27x_keypad *keypad, int r, int delta)
+{
+ struct input_dev *dev = keypad->input_dev;
+
+ if (delta == 0)
+ return;
+
+ if (keypad->rotary_up_key[r] && keypad->rotary_down_key[r]) {
+ int keycode = (delta > 0) ? keypad->rotary_up_key[r] :
+ keypad->rotary_down_key[r];
+
+ /* simulate a press-n-release */
+ input_report_key(dev, keycode, 1);
+ input_sync(dev);
+ input_report_key(dev, keycode, 0);
+ input_sync(dev);
+ } else {
+ input_report_rel(dev, keypad->rotary_rel_code[r], delta);
+ input_sync(dev);
+ }
+}
+
+static void pxa27x_keypad_scan_rotary(struct pxa27x_keypad *keypad)
+{
+ struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
+ uint32_t kprec;
+
+ /* read and reset to default count value */
+ kprec = KPREC;
+ KPREC = DEFAULT_KPREC;
+
+ if (pdata->enable_rotary0)
+ report_rotary_event(keypad, 0, rotary_delta(kprec));
+
+ if (pdata->enable_rotary1)
+ report_rotary_event(keypad, 1, rotary_delta(kprec >> 16));
+}
+
+static void pxa27x_keypad_scan_direct(struct pxa27x_keypad *keypad)
+{
+ struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
+ unsigned int new_state;
+ uint32_t kpdk, bits_changed;
+ int i;
+
+ kpdk = KPDK;
+
+ if (pdata->enable_rotary0 || pdata->enable_rotary1)
+ pxa27x_keypad_scan_rotary(keypad);
+
+ if (pdata->direct_key_map == NULL)
+ return;
+
+ new_state = KPDK_DK(kpdk) & keypad->direct_key_mask;
+ bits_changed = keypad->direct_key_state ^ new_state;
+
+ if (bits_changed == 0)
+ return;
+
+ for (i = 0; i < pdata->direct_key_num; i++) {
+ if (bits_changed & (1 << i))
+ input_report_key(keypad->input_dev,
+ pdata->direct_key_map[i],
+ (new_state & (1 << i)));
+ }
+ input_sync(keypad->input_dev);
+ keypad->direct_key_state = new_state;
+}
+
static irqreturn_t pxa27x_keypad_irq_handler(int irq, void *dev_id)
{
struct pxa27x_keypad *keypad = dev_id;
- struct input_dev *input_dev = keypad->input_dev;
unsigned long kpc = KPC;
- int rel;
-
- if (kpc & KPC_DI) {
- unsigned long kpdk = KPDK;
-
- if (!(kpdk & KPDK_DKP)) {
- /* better luck next time */
- } else if (kpc & KPC_REE0) {
- unsigned long kprec = KPREC;
- KPREC = 0x7f;
-
- if (kprec & KPREC_OF0)
- rel = (kprec & 0xff) + 0x7f;
- else if (kprec & KPREC_UF0)
- rel = (kprec & 0xff) - 0x7f - 0xff;
- else
- rel = (kprec & 0xff) - 0x7f;
-
- if (rel) {
- input_report_rel(input_dev, REL_WHEEL, rel);
- input_sync(input_dev);
- }
- }
- }
+
+ if (kpc & KPC_DI)
+ pxa27x_keypad_scan_direct(keypad);
if (kpc & KPC_MI)
pxa27x_keypad_scan_matrix(keypad);
@@ -190,6 +276,7 @@ static irqreturn_t pxa27x_keypad_irq_handler(int irq, void *dev_id)
static void pxa27x_keypad_config(struct pxa27x_keypad *keypad)
{
struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
+ unsigned int mask = 0, direct_key_num = 0;
unsigned long kpc = 0;
/* enable matrix keys with automatic scan */
@@ -199,10 +286,29 @@ static void pxa27x_keypad_config(struct pxa27x_keypad *keypad)
KPC_MKCN(pdata->matrix_key_cols);
}
- /* FIXME: hardcoded to enable rotary 0 _only_ */
- kpc |= KPC_DKN(2) | KPC_REE0 | KPC_DI | KPC_DIE;
+ /* enable rotary key, debounce interval same as direct keys */
+ if (pdata->enable_rotary0) {
+ mask |= 0x03;
+ direct_key_num = 2;
+ kpc |= KPC_REE0;
+ }
+
+ if (pdata->enable_rotary1) {
+ mask |= 0x0c;
+ direct_key_num = 4;
+ kpc |= KPC_REE1;
+ }
+
+ if (pdata->direct_key_num > direct_key_num)
+ direct_key_num = pdata->direct_key_num;
+
+ keypad->direct_key_mask = ((2 << direct_key_num) - 1) & ~mask;
+
+ /* enable direct key */
+ if (direct_key_num)
+ kpc |= KPC_DE | KPC_DIE | KPC_DKN(direct_key_num);
- KPC = kpc;
+ KPC = kpc | KPC_RE_ZERO_DEB;
KPREC = DEFAULT_KPREC;
}
@@ -301,7 +407,6 @@ static int __devinit pxa27x_keypad_probe(struct platform_device *pdev)
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) |
BIT_MASK(EV_REL);
- input_dev->relbit[BIT_WORD(REL_WHEEL)] = BIT_MASK(REL_WHEEL);
pxa27x_keypad_build_keycode(keypad);
diff --git a/include/asm-arm/arch-pxa/pxa27x_keypad.h b/include/asm-arm/arch-pxa/pxa27x_keypad.h
index 23f4ebc4102..6b832329ebc 100644
--- a/include/asm-arm/arch-pxa/pxa27x_keypad.h
+++ b/include/asm-arm/arch-pxa/pxa27x_keypad.h
@@ -6,6 +6,20 @@
#define MAX_MATRIX_KEY_ROWS (8)
#define MAX_MATRIX_KEY_COLS (8)
+/* pxa3xx keypad platform specific parameters
+ *
+ * NOTE:
+ * 1. direct_key_num indicates the number of keys in the direct keypad
+ * _plus_ the number of rotary-encoder sensor inputs, this can be
+ * left as 0 if only rotary encoders are enabled, the driver will
+ * automatically calculate this
+ *
+ * 2. direct_key_map is the key code map for the direct keys, if rotary
+ * encoder(s) are enabled, direct key 0/1(2/3) will be ignored
+ *
+ * 3. rotary can be either interpreted as a relative input event (e.g.
+ * REL_WHEEL/REL_HWHEEL) or specific keys (e.g. UP/DOWN/LEFT/RIGHT)
+ */
struct pxa27x_keypad_platform_data {
/* code map for the matrix keys */
@@ -13,6 +27,22 @@ struct pxa27x_keypad_platform_data {
unsigned int matrix_key_cols;
unsigned int *matrix_key_map;
int matrix_key_map_size;
+
+ /* direct keys */
+ int direct_key_num;
+ unsigned int direct_key_map[8];
+
+ /* rotary encoders 0 */
+ int enable_rotary0;
+ int rotary0_rel_code;
+ int rotary0_up_key;
+ int rotary0_down_key;
+
+ /* rotary encoders 1 */
+ int enable_rotary1;
+ int rotary1_rel_code;
+ int rotary1_up_key;
+ int rotary1_down_key;
};
#define KEY(row, col, val) (((row) << 28) | ((col) << 24) | (val))