Input: pxa27x_keypad - allow modifying keymap from userspace
Tested-by: Mike Rapoport <mike@compulab.co.il> Acked-by: Eric Miao <eric.y.miao@gmail.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Dmitry Torokhov
parent
7cac9cd935
commit
bd96f37895
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@ -6,6 +6,8 @@
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#define MAX_MATRIX_KEY_ROWS (8)
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#define MAX_MATRIX_KEY_COLS (8)
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#define MATRIX_ROW_SHIFT (3)
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#define MAX_DIRECT_KEY_NUM (8)
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/* pxa3xx keypad platform specific parameters
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*
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@ -34,7 +36,7 @@ struct pxa27x_keypad_platform_data {
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/* direct keys */
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int direct_key_num;
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unsigned int direct_key_map[8];
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unsigned int direct_key_map[MAX_DIRECT_KEY_NUM];
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/* rotary encoders 0 */
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int enable_rotary0;
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@ -32,7 +32,6 @@
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#include <mach/hardware.h>
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#include <mach/pxa27x_keypad.h>
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/*
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* Keypad Controller registers
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*/
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@ -96,7 +95,8 @@
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#define keypad_readl(off) __raw_readl(keypad->mmio_base + (off))
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#define keypad_writel(off, v) __raw_writel((v), keypad->mmio_base + (off))
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#define MAX_MATRIX_KEY_NUM (8 * 8)
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#define MAX_MATRIX_KEY_NUM (MAX_MATRIX_KEY_ROWS * MAX_MATRIX_KEY_COLS)
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#define MAX_KEYPAD_KEYS (MAX_MATRIX_KEY_NUM + MAX_DIRECT_KEY_NUM)
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struct pxa27x_keypad {
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struct pxa27x_keypad_platform_data *pdata;
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@ -107,73 +107,82 @@ struct pxa27x_keypad {
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int irq;
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/* matrix key code map */
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unsigned short matrix_keycodes[MAX_MATRIX_KEY_NUM];
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unsigned short keycodes[MAX_KEYPAD_KEYS];
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int rotary_rel_code[2];
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/* state row bits of each column scan */
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uint32_t matrix_key_state[MAX_MATRIX_KEY_COLS];
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uint32_t direct_key_state;
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unsigned int direct_key_mask;
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int rotary_rel_code[2];
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int rotary_up_key[2];
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int rotary_down_key[2];
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};
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static void pxa27x_keypad_build_keycode(struct pxa27x_keypad *keypad)
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{
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struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
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struct input_dev *input_dev = keypad->input_dev;
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unsigned short keycode;
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int i;
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for (i = 0; i < pdata->matrix_key_map_size; i++) {
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unsigned int key = pdata->matrix_key_map[i];
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unsigned int row = KEY_ROW(key);
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unsigned int col = KEY_COL(key);
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unsigned short code = KEY_VAL(key);
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unsigned int scancode = MATRIX_SCAN_CODE(row, col,
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MATRIX_ROW_SHIFT);
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keypad->matrix_keycodes[(row << 3) + col] = code;
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__set_bit(code, input_dev->keybit);
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keycode = KEY_VAL(key);
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keypad->keycodes[scancode] = keycode;
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__set_bit(keycode, input_dev->keybit);
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}
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__clear_bit(KEY_RESERVED, input_dev->keybit);
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for (i = 0; i < pdata->direct_key_num; i++)
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__set_bit(pdata->direct_key_map[i], input_dev->keybit);
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keypad->rotary_up_key[0] = pdata->rotary0_up_key;
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keypad->rotary_up_key[1] = pdata->rotary1_up_key;
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keypad->rotary_down_key[0] = pdata->rotary0_down_key;
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keypad->rotary_down_key[1] = pdata->rotary1_down_key;
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keypad->rotary_rel_code[0] = pdata->rotary0_rel_code;
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keypad->rotary_rel_code[1] = pdata->rotary1_rel_code;
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for (i = 0; i < pdata->direct_key_num; i++) {
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keycode = pdata->direct_key_map[i];
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keypad->keycodes[MAX_MATRIX_KEY_NUM + i] = keycode;
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__set_bit(keycode, input_dev->keybit);
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}
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if (pdata->enable_rotary0) {
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if (pdata->rotary0_up_key && pdata->rotary0_down_key) {
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__set_bit(pdata->rotary0_up_key, input_dev->keybit);
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__set_bit(pdata->rotary0_down_key, input_dev->keybit);
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} else
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keycode = pdata->rotary0_up_key;
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keypad->keycodes[MAX_MATRIX_KEY_NUM + 0] = keycode;
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__set_bit(keycode, input_dev->keybit);
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keycode = pdata->rotary0_down_key;
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keypad->keycodes[MAX_MATRIX_KEY_NUM + 1] = keycode;
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__set_bit(keycode, input_dev->keybit);
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keypad->rotary_rel_code[0] = -1;
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} else {
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keypad->rotary_rel_code[0] = pdata->rotary0_rel_code;
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__set_bit(pdata->rotary0_rel_code, input_dev->relbit);
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}
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}
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if (pdata->enable_rotary1) {
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if (pdata->rotary1_up_key && pdata->rotary1_down_key) {
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__set_bit(pdata->rotary1_up_key, input_dev->keybit);
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__set_bit(pdata->rotary1_down_key, input_dev->keybit);
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} else
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__set_bit(pdata->rotary1_rel_code, input_dev->relbit);
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}
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}
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keycode = pdata->rotary1_up_key;
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keypad->keycodes[MAX_MATRIX_KEY_NUM + 2] = keycode;
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__set_bit(keycode, input_dev->keybit);
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static inline unsigned int lookup_matrix_keycode(
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struct pxa27x_keypad *keypad, int row, int col)
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{
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return keypad->matrix_keycodes[(row << 3) + col];
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keycode = pdata->rotary1_down_key;
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keypad->keycodes[MAX_MATRIX_KEY_NUM + 3] = keycode;
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__set_bit(keycode, input_dev->keybit);
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keypad->rotary_rel_code[1] = -1;
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} else {
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keypad->rotary_rel_code[1] = pdata->rotary1_rel_code;
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__set_bit(pdata->rotary1_rel_code, input_dev->relbit);
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}
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}
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__clear_bit(KEY_RESERVED, input_dev->keybit);
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}
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static void pxa27x_keypad_scan_matrix(struct pxa27x_keypad *keypad)
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{
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struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
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struct input_dev *input_dev = keypad->input_dev;
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int row, col, num_keys_pressed = 0;
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uint32_t new_state[MAX_MATRIX_KEY_COLS];
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uint32_t kpas = keypad_readl(KPAS);
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@ -216,6 +225,7 @@ static void pxa27x_keypad_scan_matrix(struct pxa27x_keypad *keypad)
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scan:
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for (col = 0; col < pdata->matrix_key_cols; col++) {
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uint32_t bits_changed;
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int code;
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bits_changed = keypad->matrix_key_state[col] ^ new_state[col];
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if (bits_changed == 0)
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@ -225,12 +235,13 @@ scan:
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if ((bits_changed & (1 << row)) == 0)
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continue;
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input_report_key(keypad->input_dev,
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lookup_matrix_keycode(keypad, row, col),
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new_state[col] & (1 << row));
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code = MATRIX_SCAN_CODE(row, col, MATRIX_ROW_SHIFT);
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input_event(input_dev, EV_MSC, MSC_SCAN, code);
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input_report_key(input_dev, keypad->keycodes[code],
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new_state[col] & (1 << row));
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}
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}
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input_sync(keypad->input_dev);
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input_sync(input_dev);
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memcpy(keypad->matrix_key_state, new_state, sizeof(new_state));
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}
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@ -253,13 +264,15 @@ static void report_rotary_event(struct pxa27x_keypad *keypad, int r, int delta)
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if (delta == 0)
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return;
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if (keypad->rotary_up_key[r] && keypad->rotary_down_key[r]) {
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int keycode = (delta > 0) ? keypad->rotary_up_key[r] :
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keypad->rotary_down_key[r];
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if (keypad->rotary_rel_code[r] == -1) {
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int code = MAX_MATRIX_KEY_NUM + 2 * r + (delta > 0 ? 0 : 1);
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unsigned char keycode = keypad->keycodes[code];
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/* simulate a press-n-release */
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input_event(dev, EV_MSC, MSC_SCAN, code);
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input_report_key(dev, keycode, 1);
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input_sync(dev);
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input_event(dev, EV_MSC, MSC_SCAN, code);
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input_report_key(dev, keycode, 0);
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input_sync(dev);
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} else {
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@ -287,6 +300,7 @@ static void pxa27x_keypad_scan_rotary(struct pxa27x_keypad *keypad)
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static void pxa27x_keypad_scan_direct(struct pxa27x_keypad *keypad)
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{
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struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
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struct input_dev *input_dev = keypad->input_dev;
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unsigned int new_state;
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uint32_t kpdk, bits_changed;
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int i;
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@ -296,9 +310,6 @@ static void pxa27x_keypad_scan_direct(struct pxa27x_keypad *keypad)
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if (pdata->enable_rotary0 || pdata->enable_rotary1)
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pxa27x_keypad_scan_rotary(keypad);
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if (pdata->direct_key_map == NULL)
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return;
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new_state = KPDK_DK(kpdk) & keypad->direct_key_mask;
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bits_changed = keypad->direct_key_state ^ new_state;
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@ -306,12 +317,15 @@ static void pxa27x_keypad_scan_direct(struct pxa27x_keypad *keypad)
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return;
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for (i = 0; i < pdata->direct_key_num; i++) {
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if (bits_changed & (1 << i))
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input_report_key(keypad->input_dev,
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pdata->direct_key_map[i],
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(new_state & (1 << i)));
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if (bits_changed & (1 << i)) {
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int code = MAX_MATRIX_KEY_NUM + i;
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input_event(input_dev, EV_MSC, MSC_SCAN, code);
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input_report_key(input_dev, keypad->keycodes[code],
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new_state & (1 << i));
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}
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}
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input_sync(keypad->input_dev);
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input_sync(input_dev);
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keypad->direct_key_state = new_state;
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}
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@ -432,38 +446,41 @@ static const struct dev_pm_ops pxa27x_keypad_pm_ops = {
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static int __devinit pxa27x_keypad_probe(struct platform_device *pdev)
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{
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struct pxa27x_keypad_platform_data *pdata = pdev->dev.platform_data;
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struct pxa27x_keypad *keypad;
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struct input_dev *input_dev;
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struct resource *res;
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int irq, error;
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keypad = kzalloc(sizeof(struct pxa27x_keypad), GFP_KERNEL);
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if (keypad == NULL) {
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dev_err(&pdev->dev, "failed to allocate driver data\n");
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return -ENOMEM;
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}
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keypad->pdata = pdev->dev.platform_data;
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if (keypad->pdata == NULL) {
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if (pdata == NULL) {
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dev_err(&pdev->dev, "no platform data defined\n");
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error = -EINVAL;
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goto failed_free;
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return -EINVAL;
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}
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irq = platform_get_irq(pdev, 0);
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if (irq < 0) {
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dev_err(&pdev->dev, "failed to get keypad irq\n");
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error = -ENXIO;
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goto failed_free;
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return -ENXIO;
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}
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (res == NULL) {
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dev_err(&pdev->dev, "failed to get I/O memory\n");
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error = -ENXIO;
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return -ENXIO;
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}
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keypad = kzalloc(sizeof(struct pxa27x_keypad), GFP_KERNEL);
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input_dev = input_allocate_device();
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if (!keypad || !input_dev) {
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dev_err(&pdev->dev, "failed to allocate memory\n");
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error = -ENOMEM;
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goto failed_free;
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}
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keypad->pdata = pdata;
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keypad->input_dev = input_dev;
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keypad->irq = irq;
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res = request_mem_region(res->start, resource_size(res), pdev->name);
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if (res == NULL) {
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dev_err(&pdev->dev, "failed to request I/O memory\n");
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@ -485,43 +502,35 @@ static int __devinit pxa27x_keypad_probe(struct platform_device *pdev)
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goto failed_free_io;
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}
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/* Create and register the input driver. */
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input_dev = input_allocate_device();
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if (!input_dev) {
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dev_err(&pdev->dev, "failed to allocate input device\n");
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error = -ENOMEM;
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goto failed_put_clk;
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}
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input_dev->name = pdev->name;
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input_dev->id.bustype = BUS_HOST;
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input_dev->open = pxa27x_keypad_open;
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input_dev->close = pxa27x_keypad_close;
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input_dev->dev.parent = &pdev->dev;
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keypad->input_dev = input_dev;
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input_dev->keycode = keypad->keycodes;
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input_dev->keycodesize = sizeof(keypad->keycodes[0]);
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input_dev->keycodemax = ARRAY_SIZE(keypad->keycodes);
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input_set_drvdata(input_dev, keypad);
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input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
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if ((keypad->pdata->enable_rotary0 &&
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keypad->pdata->rotary0_rel_code) ||
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(keypad->pdata->enable_rotary1 &&
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keypad->pdata->rotary1_rel_code)) {
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input_dev->evbit[0] |= BIT_MASK(EV_REL);
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}
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input_set_capability(input_dev, EV_MSC, MSC_SCAN);
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pxa27x_keypad_build_keycode(keypad);
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platform_set_drvdata(pdev, keypad);
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if ((pdata->enable_rotary0 && keypad->rotary_rel_code[0] != -1) ||
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(pdata->enable_rotary1 && keypad->rotary_rel_code[1] != -1)) {
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input_dev->evbit[0] |= BIT_MASK(EV_REL);
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}
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error = request_irq(irq, pxa27x_keypad_irq_handler, IRQF_DISABLED,
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pdev->name, keypad);
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if (error) {
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dev_err(&pdev->dev, "failed to request IRQ\n");
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goto failed_free_dev;
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goto failed_put_clk;
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}
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keypad->irq = irq;
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/* Register the input device */
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error = input_register_device(input_dev);
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if (error) {
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@ -529,15 +538,13 @@ static int __devinit pxa27x_keypad_probe(struct platform_device *pdev)
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goto failed_free_irq;
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}
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platform_set_drvdata(pdev, keypad);
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device_init_wakeup(&pdev->dev, 1);
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return 0;
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failed_free_irq:
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free_irq(irq, pdev);
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platform_set_drvdata(pdev, NULL);
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failed_free_dev:
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input_free_device(input_dev);
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failed_put_clk:
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clk_put(keypad->clk);
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failed_free_io:
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@ -545,6 +552,7 @@ failed_free_io:
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failed_free_mem:
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release_mem_region(res->start, resource_size(res));
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failed_free:
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input_free_device(input_dev);
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kfree(keypad);
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return error;
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}
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@ -567,6 +575,7 @@ static int __devexit pxa27x_keypad_remove(struct platform_device *pdev)
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platform_set_drvdata(pdev, NULL);
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kfree(keypad);
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return 0;
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}
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