#define DRIVER_NAME "pxa27x-keypad"
-#define KPASMKP(col) (col/2 == 0 ? KPASMKP0 : \
- col/2 == 1 ? KPASMKP1 : \
- col/2 == 2 ? KPASMKP2 : KPASMKP3)
-#define KPASMKPx_MKC(row, col) (1 << (row + 16 * (col % 2)))
+#define KPAS_MUKP(n) (((n) >> 26) & 0x1f)
+#define KPAS_RP(n) (((n) >> 4) & 0xf)
+#define KPAS_CP(n) ((n) & 0xf)
-static struct clk *pxa27x_keypad_clk;
+#define KPASMKP_MKC_MASK (0xff)
+
+#define MAX_MATRIX_KEY_NUM (8 * 8)
+
+struct pxa27x_keypad {
+ struct pxa27x_keypad_platform_data *pdata;
+
+ struct clk *clk;
+ struct input_dev *input_dev;
+
+ /* matrix key code map */
+ unsigned int matrix_keycodes[MAX_MATRIX_KEY_NUM];
+
+ /* state row bits of each column scan */
+ uint32_t matrix_key_state[MAX_MATRIX_KEY_COLS];
+};
+
+static void pxa27x_keypad_build_keycode(struct pxa27x_keypad *keypad)
+{
+ struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
+ struct input_dev *input_dev = keypad->input_dev;
+ unsigned int *key;
+ int i;
+
+ key = &pdata->matrix_key_map[0];
+ for (i = 0; i < pdata->matrix_key_map_size; i++, key++) {
+ int row = ((*key) >> 28) & 0xf;
+ int col = ((*key) >> 24) & 0xf;
+ int code = (*key) & 0xffffff;
+
+ keypad->matrix_keycodes[(row << 3) + col] = code;
+ set_bit(code, input_dev->keybit);
+ }
+}
+
+static inline unsigned int lookup_matrix_keycode(
+ struct pxa27x_keypad *keypad, int row, int col)
+{
+ return keypad->matrix_keycodes[(row << 3) + col];
+}
+
+static void pxa27x_keypad_scan_matrix(struct pxa27x_keypad *keypad)
+{
+ struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
+ int row, col, num_keys_pressed = 0;
+ uint32_t new_state[MAX_MATRIX_KEY_COLS];
+ uint32_t kpas = KPAS;
+
+ num_keys_pressed = KPAS_MUKP(kpas);
+
+ memset(new_state, 0, sizeof(new_state));
+
+ if (num_keys_pressed == 0)
+ goto scan;
+
+ if (num_keys_pressed == 1) {
+ col = KPAS_CP(kpas);
+ row = KPAS_RP(kpas);
+
+ /* if invalid row/col, treat as no key pressed */
+ if (col >= pdata->matrix_key_cols ||
+ row >= pdata->matrix_key_rows)
+ goto scan;
+
+ new_state[col] = (1 << row);
+ goto scan;
+ }
+
+ if (num_keys_pressed > 1) {
+ uint32_t kpasmkp0 = KPASMKP0;
+ uint32_t kpasmkp1 = KPASMKP1;
+ uint32_t kpasmkp2 = KPASMKP2;
+ uint32_t kpasmkp3 = KPASMKP3;
+
+ new_state[0] = kpasmkp0 & KPASMKP_MKC_MASK;
+ new_state[1] = (kpasmkp0 >> 16) & KPASMKP_MKC_MASK;
+ new_state[2] = kpasmkp1 & KPASMKP_MKC_MASK;
+ new_state[3] = (kpasmkp1 >> 16) & KPASMKP_MKC_MASK;
+ new_state[4] = kpasmkp2 & KPASMKP_MKC_MASK;
+ new_state[5] = (kpasmkp2 >> 16) & KPASMKP_MKC_MASK;
+ new_state[6] = kpasmkp3 & KPASMKP_MKC_MASK;
+ new_state[7] = (kpasmkp3 >> 16) & KPASMKP_MKC_MASK;
+ }
+scan:
+ for (col = 0; col < pdata->matrix_key_cols; col++) {
+ uint32_t bits_changed;
+
+ bits_changed = keypad->matrix_key_state[col] ^ new_state[col];
+ if (bits_changed == 0)
+ continue;
+
+ for (row = 0; row < pdata->matrix_key_rows; row++) {
+ if ((bits_changed & (1 << row)) == 0)
+ continue;
+
+ input_report_key(keypad->input_dev,
+ lookup_matrix_keycode(keypad, row, col),
+ new_state[col] & (1 << row));
+ }
+ }
+ input_sync(keypad->input_dev);
+ memcpy(keypad->matrix_key_state, new_state, sizeof(new_state));
+}
static irqreturn_t pxa27x_keypad_irq_handler(int irq, void *dev_id)
{
- struct platform_device *pdev = dev_id;
- struct pxa27x_keypad_platform_data *pdata = pdev->dev.platform_data;
- struct input_dev *input_dev = platform_get_drvdata(pdev);
+ struct pxa27x_keypad *keypad = dev_id;
+ struct input_dev *input_dev = keypad->input_dev;
unsigned long kpc = KPC;
- int p, row, col, rel;
+ int rel;
if (kpc & KPC_DI) {
unsigned long kpdk = KPDK;
}
}
- if (kpc & KPC_MI) {
- /* report the status of every button */
- for (row = 0; row < pdata->nr_rows; row++) {
- for (col = 0; col < pdata->nr_cols; col++) {
- p = KPASMKP(col) & KPASMKPx_MKC(row, col) ?
- 1 : 0;
- pr_debug("keycode %x - pressed %x\n",
- pdata->keycodes[row][col], p);
- input_report_key(input_dev,
- pdata->keycodes[row][col], p);
- }
- }
- input_sync(input_dev);
- }
+ if (kpc & KPC_MI)
+ pxa27x_keypad_scan_matrix(keypad);
return IRQ_HANDLED;
}
static int pxa27x_keypad_open(struct input_dev *dev)
{
+ struct pxa27x_keypad *keypad = input_get_drvdata(dev);
+
/* Set keypad control register */
KPC |= (KPC_ASACT |
KPC_MS_ALL |
KPREC = 0x7F;
/* Enable unit clock */
- clk_enable(pxa27x_keypad_clk);
+ clk_enable(keypad->clk);
return 0;
}
static void pxa27x_keypad_close(struct input_dev *dev)
{
+ struct pxa27x_keypad *keypad = input_get_drvdata(dev);
+
/* Disable clock unit */
- clk_disable(pxa27x_keypad_clk);
+ clk_disable(keypad->clk);
}
#ifdef CONFIG_PM
static int pxa27x_keypad_suspend(struct platform_device *pdev, pm_message_t state)
{
- struct pxa27x_keypad_platform_data *pdata = pdev->dev.platform_data;
+ struct pxa27x_keypad *keypad = platform_get_drvdata(pdev);
+ struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
/* Save controller status */
pdata->reg_kpc = KPC;
static int pxa27x_keypad_resume(struct platform_device *pdev)
{
- struct pxa27x_keypad_platform_data *pdata = pdev->dev.platform_data;
- struct input_dev *input_dev = platform_get_drvdata(pdev);
+ struct pxa27x_keypad *keypad = platform_get_drvdata(pdev);
+ struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
+ struct input_dev *input_dev = keypad->input_dev;
mutex_lock(&input_dev->mutex);
KPREC = pdata->reg_kprec;
/* Enable unit clock */
- clk_disable(pxa27x_keypad_clk);
- clk_enable(pxa27x_keypad_clk);
+ clk_enable(keypad->clk);
}
mutex_unlock(&input_dev->mutex);
static int __devinit pxa27x_keypad_probe(struct platform_device *pdev)
{
- struct pxa27x_keypad_platform_data *pdata = pdev->dev.platform_data;
+ struct pxa27x_keypad *keypad;
struct input_dev *input_dev;
- int i, row, col, error;
+ int col, error;
- pxa27x_keypad_clk = clk_get(&pdev->dev, "KBDCLK");
- if (IS_ERR(pxa27x_keypad_clk)) {
- error = PTR_ERR(pxa27x_keypad_clk);
- goto err_clk;
+ keypad = kzalloc(sizeof(struct pxa27x_keypad), GFP_KERNEL);
+ if (keypad == NULL) {
+ dev_err(&pdev->dev, "failed to allocate driver data\n");
+ return -ENOMEM;
+ }
+
+ keypad->pdata = pdev->dev.platform_data;
+ if (keypad->pdata == NULL) {
+ dev_err(&pdev->dev, "no platform data defined\n");
+ error = -EINVAL;
+ goto failed_free;
+ }
+
+ keypad->clk = clk_get(&pdev->dev, "KBDCLK");
+ if (IS_ERR(keypad->clk)) {
+ dev_err(&pdev->dev, "failed to get keypad clock\n");
+ error = PTR_ERR(keypad->clk);
+ goto failed_free;
}
/* Create and register the input driver. */
input_dev = input_allocate_device();
if (!input_dev) {
- printk(KERN_ERR "Cannot request keypad device\n");
+ dev_err(&pdev->dev, "failed to allocate input device\n");
error = -ENOMEM;
- goto err_alloc;
+ goto failed_put_clk;
}
input_dev->name = DRIVER_NAME;
input_dev->close = pxa27x_keypad_close;
input_dev->dev.parent = &pdev->dev;
+ keypad->input_dev = input_dev;
+ input_set_drvdata(input_dev, keypad);
+
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);
- for (row = 0; row < pdata->nr_rows; row++) {
- for (col = 0; col < pdata->nr_cols; col++) {
- int code = pdata->keycodes[row][col];
- if (code > 0)
- set_bit(code, input_dev->keybit);
- }
- }
+
+ pxa27x_keypad_build_keycode(keypad);
error = request_irq(IRQ_KEYPAD, pxa27x_keypad_irq_handler, IRQF_DISABLED,
- DRIVER_NAME, pdev);
+ DRIVER_NAME, keypad);
if (error) {
printk(KERN_ERR "Cannot request keypad IRQ\n");
goto err_free_dev;
}
- platform_set_drvdata(pdev, input_dev);
+ platform_set_drvdata(pdev, keypad);
/* Register the input device */
error = input_register_device(input_dev);
* Store rows/cols info into keyboard registers.
*/
- KPC |= (pdata->nr_rows - 1) << 26;
- KPC |= (pdata->nr_cols - 1) << 23;
+ KPC |= (keypad->pdata->matrix_key_rows - 1) << 26;
+ KPC |= (keypad->pdata->matrix_key_cols - 1) << 23;
- for (col = 0; col < pdata->nr_cols; col++)
+ for (col = 0; col < keypad->pdata->matrix_key_cols; col++)
KPC |= KPC_MS0 << col;
return 0;
free_irq(IRQ_KEYPAD, pdev);
err_free_dev:
input_free_device(input_dev);
- err_alloc:
- clk_put(pxa27x_keypad_clk);
- err_clk:
+failed_put_clk:
+ clk_put(keypad->clk);
+failed_free:
+ kfree(keypad);
return error;
}
static int __devexit pxa27x_keypad_remove(struct platform_device *pdev)
{
- struct input_dev *input_dev = platform_get_drvdata(pdev);
+ struct pxa27x_keypad *keypad = platform_get_drvdata(pdev);
- input_unregister_device(input_dev);
free_irq(IRQ_KEYPAD, pdev);
- clk_put(pxa27x_keypad_clk);
- platform_set_drvdata(pdev, NULL);
+ clk_disable(keypad->clk);
+ clk_put(keypad->clk);
+
+ input_unregister_device(keypad->input_dev);
+
+ platform_set_drvdata(pdev, NULL);
+ kfree(keypad);
return 0;
}
git.openpandora.org / pandora-kernel.git / blobdiff