/*
* Registers keypad device with input subsystem
* and configures TWL4030 keypad registers
*/
static int __devinit twl4030_kp_probe(struct platform_device *pdev)
{
u8 reg;
int i;
int ret = 0;
struct twl4030_keypad *kp;
struct twl4030_keypad_data *pdata = pdev->dev.platform_data;
if (!pdata || !pdata->rows || !pdata->cols || !pdata->keymap
|| pdata->rows > 8 || pdata->cols > 8) {
dev_err(&pdev->dev, "Invalid platform_data\n");
return -EINVAL;
}
kp = kzalloc(sizeof(*kp), GFP_KERNEL);
if (!kp)
return -ENOMEM;
platform_set_drvdata(pdev, kp);
/* Get the debug Device */
kp->dbg_dev = &pdev->dev;
kp->input = input_allocate_device();
if (!kp->input) {
kfree(kp);
return -ENOMEM;
}
kp->keymap = pdata->keymap;
kp->keymapsize = pdata->keymapsize;
kp->n_rows = pdata->rows;
kp->n_cols = pdata->cols;
kp->irq = platform_get_irq(pdev, 0);
/* setup input device */
__set_bit(EV_KEY, kp->input->evbit);
/* Enable auto repeat feature of Linux input subsystem */
if (pdata->rep)
__set_bit(EV_REP, kp->input->evbit);
for (i = 0; i < kp->keymapsize; i++)
__set_bit(kp->keymap[i] & KEYNUM_MASK,
kp->input->keybit);
kp->input->name = "TWL4030 Keypad";
kp->input->phys = "twl4030_keypad/input0";
kp->input->dev.parent = &pdev->dev;
kp->input->id.bustype = BUS_HOST;
kp->input->id.vendor = 0x0001;
kp->input->id.product = 0x0001;
kp->input->id.version = 0x0003;
kp->input->keycode = kp->keymap;
kp->input->keycodesize = sizeof(unsigned int);
kp->input->keycodemax = kp->keymapsize;
ret = input_register_device(kp->input);
if (ret < 0) {
dev_err(kp->dbg_dev,
"Unable to register twl4030 keypad device\n");
goto err2;
}
/* Enable controller, with hardware decoding but not autorepeat */
reg = KEYP_CTRL_SOFT_NRST | KEYP_CTRL_SOFTMODEN
| KEYP_CTRL_TOE_EN | KEYP_CTRL_KBD_ON;
ret = twl4030_kpwrite_u8(kp, reg, KEYP_CTRL);
if (ret < 0)
goto err3;
/* NOTE: we could use sih_setup() here to package keypad
* event sources as four different IRQs ... but we don't.
*/
/* Enable TO rising and KP rising and falling edge detection */
reg = KEYP_EDR_KP_BOTH | KEYP_EDR_TO_RISING;
ret = twl4030_kpwrite_u8(kp, reg, KEYP_EDR);
if (ret < 0)
goto err3;
/* Set PTV prescaler Field */
reg = (PTV_PRESCALER << KEYP_LK_PTV_PTV_SHIFT);
ret = twl4030_kpwrite_u8(kp, reg, KEYP_LK_PTV);
if (ret < 0)
goto err3;
/* Set key debounce time to 20 ms */
i = KEYP_PERIOD_US(20000, PTV_PRESCALER);
ret = twl4030_kpwrite_u8(kp, i, KEYP_DEB);
if (ret < 0)
goto err3;
/* Set timeout period to 100 ms */
i = KEYP_PERIOD_US(200000, PTV_PRESCALER);
ret = twl4030_kpwrite_u8(kp, (i & 0xFF), KEYP_TIMEOUT_L);
if (ret < 0)
goto err3;
ret = twl4030_kpwrite_u8(kp, (i >> 8), KEYP_TIMEOUT_H);
if (ret < 0)
goto err3;
/* Enable Clear-on-Read; disable remembering events that fire
* after the IRQ but before our handler acks (reads) them,
*/
reg = TWL4030_SIH_CTRL_COR_MASK | TWL4030_SIH_CTRL_PENDDIS_MASK;
ret = twl4030_kpwrite_u8(kp, reg, KEYP_SIH_CTRL);
if (ret < 0)
goto err3;
/* initialize key state; irqs update it from here on */
ret = twl4030_read_kp_matrix_state(kp, kp->kp_state);
if (ret < 0)
goto err3;
/*
* This ISR will always execute in kernel thread context because of
* the need to access the TWL4030 over the I2C bus.
*
* NOTE: we assume this host is wired to TWL4040 INT1, not INT2 ...
*/
ret = request_irq(kp->irq, do_kp_irq, 0, pdev->name, kp);
if (ret < 0) {
dev_info(kp->dbg_dev, "request_irq failed for irq no=%d\n",
kp->irq);
goto err3;
} else {
/* Enable KP and TO interrupts now. */
reg = (u8) ~(KEYP_IMR1_KP | KEYP_IMR1_TO);
ret = twl4030_kpwrite_u8(kp, reg, KEYP_IMR1);
if (ret < 0)
goto err5;
}
return ret;
err5:
/* mask all events - we don't care about the result */
(void) twl4030_kpwrite_u8(kp, 0xff, KEYP_IMR1);
free_irq(kp->irq, NULL);
err3:
input_unregister_device(kp->input);
kp->input = NULL;
err2:
input_free_device(kp->input);
kfree(kp);
return -ENODEV;
}
/*
* Registers keypad device with input sub system
* and configures TWL4030 keypad registers
*/
static int __init omap_kp_probe(struct platform_device *pdev)
{
u8 reg;
int i;
int ret = 0;
struct omap_keypad *kp;
struct twl4030_keypad_data *pdata = pdev->dev.platform_data;
kp = kzalloc(sizeof(*kp), GFP_KERNEL);
if (!kp)
return -ENOMEM;
if (!pdata->rows || !pdata->cols || !pdata->keymap) {
dev_err(&pdev->dev, "No rows, cols or keymap from pdata\n");
kfree(kp);
return -EINVAL;
}
dev_set_drvdata(&pdev->dev, kp);
/* Get the debug Device */
kp->dbg_dev = &pdev->dev;
kp->omap_twl4030kp = input_allocate_device();
if (!kp->omap_twl4030kp) {
kfree(kp);
return -ENOMEM;
}
mutex_init(&kp->mutex);
kp->keymap = pdata->keymap;
kp->keymapsize = pdata->keymapsize;
kp->n_rows = pdata->rows;
kp->n_cols = pdata->cols;
kp->irq = pdata->irq;
/* setup input device */
set_bit(EV_KEY, kp->omap_twl4030kp->evbit);
/* Enable auto repeat feature of Linux input subsystem */
if (pdata->rep)
set_bit(EV_REP, kp->omap_twl4030kp->evbit);
for (i = 0; i < kp->keymapsize; i++)
set_bit(kp->keymap[i] & KEYNUM_MASK,
kp->omap_twl4030kp->keybit);
kp->omap_twl4030kp->name = "omap_twl4030keypad";
kp->omap_twl4030kp->phys = "omap_twl4030keypad/input0";
kp->omap_twl4030kp->dev.parent = &pdev->dev;
kp->omap_twl4030kp->id.bustype = BUS_HOST;
kp->omap_twl4030kp->id.vendor = 0x0001;
kp->omap_twl4030kp->id.product = 0x0001;
kp->omap_twl4030kp->id.version = 0x0003;
kp->omap_twl4030kp->keycode = kp->keymap;
kp->omap_twl4030kp->keycodesize = sizeof(unsigned int);
kp->omap_twl4030kp->keycodemax = kp->keymapsize;
ret = input_register_device(kp->omap_twl4030kp);
if (ret < 0) {
dev_err(kp->dbg_dev,
"Unable to register twl4030 keypad device\n");
goto err2;
}
/* Disable auto-repeat */
reg = KEYP_CTRL_NOAUTORPT;
ret = twl4030_kpwrite_u8(kp, TWL4030_MODULE_KEYPAD, reg, KEYP_CTRL);
if (ret < 0)
goto err3;
/* Enable TO rising and KP rising and falling edge detection */
reg = KEYP_EDR_KP_BOTH | KEYP_EDR_TO_RISING;
ret = twl4030_kpwrite_u8(kp, TWL4030_MODULE_KEYPAD, reg, KEYP_EDR);
if (ret < 0)
goto err3;
/* Set PTV prescaler Field */
reg = (PTV_PRESCALER << KEYP_LK_PTV_PTV_SHIFT);
ret = twl4030_kpwrite_u8(kp, TWL4030_MODULE_KEYPAD, reg, KEYP_LK_PTV);
if (ret < 0)
goto err3;
/* Set key debounce time to 20 ms */
i = KEYP_PERIOD_US(20000, PTV_PRESCALER);
ret = twl4030_kpwrite_u8(kp, TWL4030_MODULE_KEYPAD, i, KEYP_DEB);
if (ret < 0)
goto err3;
/* Set timeout period to 100 ms */
i = KEYP_PERIOD_US(200000, PTV_PRESCALER);
ret = twl4030_kpwrite_u8(kp, TWL4030_MODULE_KEYPAD,
(i & 0xFF), KEYP_TIMEOUT_L);
if (ret < 0)
goto err3;
ret = twl4030_kpwrite_u8(kp, TWL4030_MODULE_KEYPAD,
(i >> 8), KEYP_TIMEOUT_H);
if (ret < 0)
goto err3;
/* Enable Clear-on-Read */
reg = KEYP_SIH_CTRL_COR | KEYP_SIH_CTRL_PEND_DIS;
ret = twl4030_kpwrite_u8(kp, TWL4030_MODULE_KEYPAD,
reg, KEYP_SIH_CTRL);
if (ret < 0)
goto err3;
/*
* This ISR will always execute in kernel thread context because of
* the need to access the TWL4030 over the I2C bus.
*/
ret = request_irq(kp->irq, do_kp_irq, 0, pdev->name, kp);
if (ret < 0) {
dev_info(kp->dbg_dev, "request_irq failed for irq no=%d\n",
kp->irq);
goto err3;
} else {
/* Enable KP and TO interrupts now. */
reg = ~(KEYP_IMR1_KP | KEYP_IMR1_TO);
ret = twl4030_kpwrite_u8(kp, TWL4030_MODULE_KEYPAD,
reg, KEYP_IMR1);
if (ret < 0)
goto err5;
}
ret = omap_kp_read_kp_matrix_state(kp, kp->kp_state);
if (ret < 0)
goto err4;
return ret;
err5:
/* mask all events - we don't care about the result */
(void) twl4030_kpwrite_u8(kp, TWL4030_MODULE_KEYPAD, 0xff, KEYP_IMR1);
err4:
free_irq(kp->irq, NULL);
err3:
input_unregister_device(kp->omap_twl4030kp);
err2:
input_free_device(kp->omap_twl4030kp);
return -ENODEV;
}