input: Add Qualcomm pm8xxx keypad controller driver
Add Qualcomm PMIC8XXX based keypad controller driver supporting upto 18x8 matrix configuration. Acked-by: Dmitry Torokhov <dtor@mail.ru> Signed-off-by: Trilok Soni <tsoni@codeaurora.org> Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Trilok Soni
Samuel Ortiz
parent
7e6502d577
commit
39325b59d8
4 changed files with 863 additions and 0 deletions
|
|
@ -412,6 +412,17 @@ config KEYBOARD_PXA930_ROTARY
|
|||
To compile this driver as a module, choose M here: the
|
||||
module will be called pxa930_rotary.
|
||||
|
||||
config KEYBOARD_PMIC8XXX
|
||||
tristate "Qualcomm PMIC8XXX keypad support"
|
||||
depends on MFD_PM8XXX
|
||||
help
|
||||
Say Y here if you want to enable the driver for the PMIC8XXX
|
||||
keypad provided as a reference design from Qualcomm. This is intended
|
||||
to support upto 18x8 matrix based keypad design.
|
||||
|
||||
To compile this driver as a module, choose M here: the module will
|
||||
be called pmic8xxx-keypad.
|
||||
|
||||
config KEYBOARD_SAMSUNG
|
||||
tristate "Samsung keypad support"
|
||||
depends on SAMSUNG_DEV_KEYPAD
|
||||
|
|
|
|||
|
|
@ -34,6 +34,7 @@ obj-$(CONFIG_KEYBOARD_NOMADIK) += nomadik-ske-keypad.o
|
|||
obj-$(CONFIG_KEYBOARD_OMAP) += omap-keypad.o
|
||||
obj-$(CONFIG_KEYBOARD_OMAP4) += omap4-keypad.o
|
||||
obj-$(CONFIG_KEYBOARD_OPENCORES) += opencores-kbd.o
|
||||
obj-$(CONFIG_KEYBOARD_PMIC8XXX) += pmic8xxx-keypad.o
|
||||
obj-$(CONFIG_KEYBOARD_PXA27x) += pxa27x_keypad.o
|
||||
obj-$(CONFIG_KEYBOARD_PXA930_ROTARY) += pxa930_rotary.o
|
||||
obj-$(CONFIG_KEYBOARD_QT1070) += qt1070.o
|
||||
|
|
|
|||
799
drivers/input/keyboard/pmic8xxx-keypad.c
Normal file
799
drivers/input/keyboard/pmic8xxx-keypad.c
Normal file
|
|
@ -0,0 +1,799 @@
|
|||
/* Copyright (c) 2009-2011, Code Aurora Forum. All rights reserved.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 and
|
||||
* only version 2 as published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/input.h>
|
||||
#include <linux/bitops.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/mutex.h>
|
||||
|
||||
#include <linux/mfd/pm8xxx/core.h>
|
||||
#include <linux/mfd/pm8xxx/gpio.h>
|
||||
#include <linux/input/pmic8xxx-keypad.h>
|
||||
|
||||
#define PM8XXX_MAX_ROWS 18
|
||||
#define PM8XXX_MAX_COLS 8
|
||||
#define PM8XXX_ROW_SHIFT 3
|
||||
#define PM8XXX_MATRIX_MAX_SIZE (PM8XXX_MAX_ROWS * PM8XXX_MAX_COLS)
|
||||
|
||||
#define PM8XXX_MIN_ROWS 5
|
||||
#define PM8XXX_MIN_COLS 5
|
||||
|
||||
#define MAX_SCAN_DELAY 128
|
||||
#define MIN_SCAN_DELAY 1
|
||||
|
||||
/* in nanoseconds */
|
||||
#define MAX_ROW_HOLD_DELAY 122000
|
||||
#define MIN_ROW_HOLD_DELAY 30500
|
||||
|
||||
#define MAX_DEBOUNCE_TIME 20
|
||||
#define MIN_DEBOUNCE_TIME 5
|
||||
|
||||
#define KEYP_CTRL 0x148
|
||||
|
||||
#define KEYP_CTRL_EVNTS BIT(0)
|
||||
#define KEYP_CTRL_EVNTS_MASK 0x3
|
||||
|
||||
#define KEYP_CTRL_SCAN_COLS_SHIFT 5
|
||||
#define KEYP_CTRL_SCAN_COLS_MIN 5
|
||||
#define KEYP_CTRL_SCAN_COLS_BITS 0x3
|
||||
|
||||
#define KEYP_CTRL_SCAN_ROWS_SHIFT 2
|
||||
#define KEYP_CTRL_SCAN_ROWS_MIN 5
|
||||
#define KEYP_CTRL_SCAN_ROWS_BITS 0x7
|
||||
|
||||
#define KEYP_CTRL_KEYP_EN BIT(7)
|
||||
|
||||
#define KEYP_SCAN 0x149
|
||||
|
||||
#define KEYP_SCAN_READ_STATE BIT(0)
|
||||
#define KEYP_SCAN_DBOUNCE_SHIFT 1
|
||||
#define KEYP_SCAN_PAUSE_SHIFT 3
|
||||
#define KEYP_SCAN_ROW_HOLD_SHIFT 6
|
||||
|
||||
#define KEYP_TEST 0x14A
|
||||
|
||||
#define KEYP_TEST_CLEAR_RECENT_SCAN BIT(6)
|
||||
#define KEYP_TEST_CLEAR_OLD_SCAN BIT(5)
|
||||
#define KEYP_TEST_READ_RESET BIT(4)
|
||||
#define KEYP_TEST_DTEST_EN BIT(3)
|
||||
#define KEYP_TEST_ABORT_READ BIT(0)
|
||||
|
||||
#define KEYP_TEST_DBG_SELECT_SHIFT 1
|
||||
|
||||
/* bits of these registers represent
|
||||
* '0' for key press
|
||||
* '1' for key release
|
||||
*/
|
||||
#define KEYP_RECENT_DATA 0x14B
|
||||
#define KEYP_OLD_DATA 0x14C
|
||||
|
||||
#define KEYP_CLOCK_FREQ 32768
|
||||
|
||||
/**
|
||||
* struct pmic8xxx_kp - internal keypad data structure
|
||||
* @pdata - keypad platform data pointer
|
||||
* @input - input device pointer for keypad
|
||||
* @key_sense_irq - key press/release irq number
|
||||
* @key_stuck_irq - key stuck notification irq number
|
||||
* @keycodes - array to hold the key codes
|
||||
* @dev - parent device pointer
|
||||
* @keystate - present key press/release state
|
||||
* @stuckstate - present state when key stuck irq
|
||||
* @ctrl_reg - control register value
|
||||
*/
|
||||
struct pmic8xxx_kp {
|
||||
const struct pm8xxx_keypad_platform_data *pdata;
|
||||
struct input_dev *input;
|
||||
int key_sense_irq;
|
||||
int key_stuck_irq;
|
||||
|
||||
unsigned short keycodes[PM8XXX_MATRIX_MAX_SIZE];
|
||||
|
||||
struct device *dev;
|
||||
u16 keystate[PM8XXX_MAX_ROWS];
|
||||
u16 stuckstate[PM8XXX_MAX_ROWS];
|
||||
|
||||
u8 ctrl_reg;
|
||||
};
|
||||
|
||||
static int pmic8xxx_kp_write_u8(struct pmic8xxx_kp *kp,
|
||||
u8 data, u16 reg)
|
||||
{
|
||||
int rc;
|
||||
|
||||
rc = pm8xxx_writeb(kp->dev->parent, reg, data);
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int pmic8xxx_kp_read(struct pmic8xxx_kp *kp,
|
||||
u8 *data, u16 reg, unsigned num_bytes)
|
||||
{
|
||||
int rc;
|
||||
|
||||
rc = pm8xxx_read_buf(kp->dev->parent, reg, data, num_bytes);
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int pmic8xxx_kp_read_u8(struct pmic8xxx_kp *kp,
|
||||
u8 *data, u16 reg)
|
||||
{
|
||||
int rc;
|
||||
|
||||
rc = pmic8xxx_kp_read(kp, data, reg, 1);
|
||||
return rc;
|
||||
}
|
||||
|
||||
static u8 pmic8xxx_col_state(struct pmic8xxx_kp *kp, u8 col)
|
||||
{
|
||||
/* all keys pressed on that particular row? */
|
||||
if (col == 0x00)
|
||||
return 1 << kp->pdata->num_cols;
|
||||
else
|
||||
return col & ((1 << kp->pdata->num_cols) - 1);
|
||||
}
|
||||
|
||||
/*
|
||||
* Synchronous read protocol for RevB0 onwards:
|
||||
*
|
||||
* 1. Write '1' to ReadState bit in KEYP_SCAN register
|
||||
* 2. Wait 2*32KHz clocks, so that HW can successfully enter read mode
|
||||
* synchronously
|
||||
* 3. Read rows in old array first if events are more than one
|
||||
* 4. Read rows in recent array
|
||||
* 5. Wait 4*32KHz clocks
|
||||
* 6. Write '0' to ReadState bit of KEYP_SCAN register so that hw can
|
||||
* synchronously exit read mode.
|
||||
*/
|
||||
static int pmic8xxx_chk_sync_read(struct pmic8xxx_kp *kp)
|
||||
{
|
||||
int rc;
|
||||
u8 scan_val;
|
||||
|
||||
rc = pmic8xxx_kp_read_u8(kp, &scan_val, KEYP_SCAN);
|
||||
if (rc < 0) {
|
||||
dev_err(kp->dev, "Error reading KEYP_SCAN reg, rc=%d\n", rc);
|
||||
return rc;
|
||||
}
|
||||
|
||||
scan_val |= 0x1;
|
||||
|
||||
rc = pmic8xxx_kp_write_u8(kp, scan_val, KEYP_SCAN);
|
||||
if (rc < 0) {
|
||||
dev_err(kp->dev, "Error writing KEYP_SCAN reg, rc=%d\n", rc);
|
||||
return rc;
|
||||
}
|
||||
|
||||
/* 2 * 32KHz clocks */
|
||||
udelay((2 * DIV_ROUND_UP(USEC_PER_SEC, KEYP_CLOCK_FREQ)) + 1);
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int pmic8xxx_kp_read_data(struct pmic8xxx_kp *kp, u16 *state,
|
||||
u16 data_reg, int read_rows)
|
||||
{
|
||||
int rc, row;
|
||||
u8 new_data[PM8XXX_MAX_ROWS];
|
||||
|
||||
rc = pmic8xxx_kp_read(kp, new_data, data_reg, read_rows);
|
||||
if (rc)
|
||||
return rc;
|
||||
|
||||
for (row = 0; row < kp->pdata->num_rows; row++) {
|
||||
dev_dbg(kp->dev, "new_data[%d] = %d\n", row,
|
||||
new_data[row]);
|
||||
state[row] = pmic8xxx_col_state(kp, new_data[row]);
|
||||
}
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int pmic8xxx_kp_read_matrix(struct pmic8xxx_kp *kp, u16 *new_state,
|
||||
u16 *old_state)
|
||||
{
|
||||
int rc, read_rows;
|
||||
u8 scan_val;
|
||||
|
||||
if (kp->pdata->num_rows < PM8XXX_MIN_ROWS)
|
||||
read_rows = PM8XXX_MIN_ROWS;
|
||||
else
|
||||
read_rows = kp->pdata->num_rows;
|
||||
|
||||
pmic8xxx_chk_sync_read(kp);
|
||||
|
||||
if (old_state) {
|
||||
rc = pmic8xxx_kp_read_data(kp, old_state, KEYP_OLD_DATA,
|
||||
read_rows);
|
||||
if (rc < 0) {
|
||||
dev_err(kp->dev,
|
||||
"Error reading KEYP_OLD_DATA, rc=%d\n", rc);
|
||||
return rc;
|
||||
}
|
||||
}
|
||||
|
||||
rc = pmic8xxx_kp_read_data(kp, new_state, KEYP_RECENT_DATA,
|
||||
read_rows);
|
||||
if (rc < 0) {
|
||||
dev_err(kp->dev,
|
||||
"Error reading KEYP_RECENT_DATA, rc=%d\n", rc);
|
||||
return rc;
|
||||
}
|
||||
|
||||
/* 4 * 32KHz clocks */
|
||||
udelay((4 * DIV_ROUND_UP(USEC_PER_SEC, KEYP_CLOCK_FREQ)) + 1);
|
||||
|
||||
rc = pmic8xxx_kp_read_u8(kp, &scan_val, KEYP_SCAN);
|
||||
if (rc < 0) {
|
||||
dev_err(kp->dev, "Error reading KEYP_SCAN reg, rc=%d\n", rc);
|
||||
return rc;
|
||||
}
|
||||
|
||||
scan_val &= 0xFE;
|
||||
rc = pmic8xxx_kp_write_u8(kp, scan_val, KEYP_SCAN);
|
||||
if (rc < 0)
|
||||
dev_err(kp->dev, "Error writing KEYP_SCAN reg, rc=%d\n", rc);
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
static void __pmic8xxx_kp_scan_matrix(struct pmic8xxx_kp *kp, u16 *new_state,
|
||||
u16 *old_state)
|
||||
{
|
||||
int row, col, code;
|
||||
|
||||
for (row = 0; row < kp->pdata->num_rows; row++) {
|
||||
int bits_changed = new_state[row] ^ old_state[row];
|
||||
|
||||
if (!bits_changed)
|
||||
continue;
|
||||
|
||||
for (col = 0; col < kp->pdata->num_cols; col++) {
|
||||
if (!(bits_changed & (1 << col)))
|
||||
continue;
|
||||
|
||||
dev_dbg(kp->dev, "key [%d:%d] %s\n", row, col,
|
||||
!(new_state[row] & (1 << col)) ?
|
||||
"pressed" : "released");
|
||||
|
||||
code = MATRIX_SCAN_CODE(row, col, PM8XXX_ROW_SHIFT);
|
||||
|
||||
input_event(kp->input, EV_MSC, MSC_SCAN, code);
|
||||
input_report_key(kp->input,
|
||||
kp->keycodes[code],
|
||||
!(new_state[row] & (1 << col)));
|
||||
|
||||
input_sync(kp->input);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static bool pmic8xxx_detect_ghost_keys(struct pmic8xxx_kp *kp, u16 *new_state)
|
||||
{
|
||||
int row, found_first = -1;
|
||||
u16 check, row_state;
|
||||
|
||||
check = 0;
|
||||
for (row = 0; row < kp->pdata->num_rows; row++) {
|
||||
row_state = (~new_state[row]) &
|
||||
((1 << kp->pdata->num_cols) - 1);
|
||||
|
||||
if (hweight16(row_state) > 1) {
|
||||
if (found_first == -1)
|
||||
found_first = row;
|
||||
if (check & row_state) {
|
||||
dev_dbg(kp->dev, "detected ghost key on row[%d]"
|
||||
" and row[%d]\n", found_first, row);
|
||||
return true;
|
||||
}
|
||||
}
|
||||
check |= row_state;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
static int pmic8xxx_kp_scan_matrix(struct pmic8xxx_kp *kp, unsigned int events)
|
||||
{
|
||||
u16 new_state[PM8XXX_MAX_ROWS];
|
||||
u16 old_state[PM8XXX_MAX_ROWS];
|
||||
int rc;
|
||||
|
||||
switch (events) {
|
||||
case 0x1:
|
||||
rc = pmic8xxx_kp_read_matrix(kp, new_state, NULL);
|
||||
if (rc < 0)
|
||||
return rc;
|
||||
|
||||
/* detecting ghost key is not an error */
|
||||
if (pmic8xxx_detect_ghost_keys(kp, new_state))
|
||||
return 0;
|
||||
__pmic8xxx_kp_scan_matrix(kp, new_state, kp->keystate);
|
||||
memcpy(kp->keystate, new_state, sizeof(new_state));
|
||||
break;
|
||||
case 0x3: /* two events - eventcounter is gray-coded */
|
||||
rc = pmic8xxx_kp_read_matrix(kp, new_state, old_state);
|
||||
if (rc < 0)
|
||||
return rc;
|
||||
|
||||
__pmic8xxx_kp_scan_matrix(kp, old_state, kp->keystate);
|
||||
__pmic8xxx_kp_scan_matrix(kp, new_state, old_state);
|
||||
memcpy(kp->keystate, new_state, sizeof(new_state));
|
||||
break;
|
||||
case 0x2:
|
||||
dev_dbg(kp->dev, "Some key events were lost\n");
|
||||
rc = pmic8xxx_kp_read_matrix(kp, new_state, old_state);
|
||||
if (rc < 0)
|
||||
return rc;
|
||||
__pmic8xxx_kp_scan_matrix(kp, old_state, kp->keystate);
|
||||
__pmic8xxx_kp_scan_matrix(kp, new_state, old_state);
|
||||
memcpy(kp->keystate, new_state, sizeof(new_state));
|
||||
break;
|
||||
default:
|
||||
rc = -EINVAL;
|
||||
}
|
||||
return rc;
|
||||
}
|
||||
|
||||
/*
|
||||
* NOTE: We are reading recent and old data registers blindly
|
||||
* whenever key-stuck interrupt happens, because events counter doesn't
|
||||
* get updated when this interrupt happens due to key stuck doesn't get
|
||||
* considered as key state change.
|
||||
*
|
||||
* We are not using old data register contents after they are being read
|
||||
* because it might report the key which was pressed before the key being stuck
|
||||
* as stuck key because it's pressed status is stored in the old data
|
||||
* register.
|
||||
*/
|
||||
static irqreturn_t pmic8xxx_kp_stuck_irq(int irq, void *data)
|
||||
{
|
||||
u16 new_state[PM8XXX_MAX_ROWS];
|
||||
u16 old_state[PM8XXX_MAX_ROWS];
|
||||
int rc;
|
||||
struct pmic8xxx_kp *kp = data;
|
||||
|
||||
rc = pmic8xxx_kp_read_matrix(kp, new_state, old_state);
|
||||
if (rc < 0) {
|
||||
dev_err(kp->dev, "failed to read keypad matrix\n");
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
__pmic8xxx_kp_scan_matrix(kp, new_state, kp->stuckstate);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static irqreturn_t pmic8xxx_kp_irq(int irq, void *data)
|
||||
{
|
||||
struct pmic8xxx_kp *kp = data;
|
||||
u8 ctrl_val, events;
|
||||
int rc;
|
||||
|
||||
rc = pmic8xxx_kp_read(kp, &ctrl_val, KEYP_CTRL, 1);
|
||||
if (rc < 0) {
|
||||
dev_err(kp->dev, "failed to read keyp_ctrl register\n");
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
events = ctrl_val & KEYP_CTRL_EVNTS_MASK;
|
||||
|
||||
rc = pmic8xxx_kp_scan_matrix(kp, events);
|
||||
if (rc < 0)
|
||||
dev_err(kp->dev, "failed to scan matrix\n");
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static int __devinit pmic8xxx_kpd_init(struct pmic8xxx_kp *kp)
|
||||
{
|
||||
int bits, rc, cycles;
|
||||
u8 scan_val = 0, ctrl_val = 0;
|
||||
static const u8 row_bits[] = {
|
||||
0, 1, 2, 3, 4, 4, 5, 5, 6, 6, 6, 7, 7, 7,
|
||||
};
|
||||
|
||||
/* Find column bits */
|
||||
if (kp->pdata->num_cols < KEYP_CTRL_SCAN_COLS_MIN)
|
||||
bits = 0;
|
||||
else
|
||||
bits = kp->pdata->num_cols - KEYP_CTRL_SCAN_COLS_MIN;
|
||||
ctrl_val = (bits & KEYP_CTRL_SCAN_COLS_BITS) <<
|
||||
KEYP_CTRL_SCAN_COLS_SHIFT;
|
||||
|
||||
/* Find row bits */
|
||||
if (kp->pdata->num_rows < KEYP_CTRL_SCAN_ROWS_MIN)
|
||||
bits = 0;
|
||||
else
|
||||
bits = row_bits[kp->pdata->num_rows - KEYP_CTRL_SCAN_ROWS_MIN];
|
||||
|
||||
ctrl_val |= (bits << KEYP_CTRL_SCAN_ROWS_SHIFT);
|
||||
|
||||
rc = pmic8xxx_kp_write_u8(kp, ctrl_val, KEYP_CTRL);
|
||||
if (rc < 0) {
|
||||
dev_err(kp->dev, "Error writing KEYP_CTRL reg, rc=%d\n", rc);
|
||||
return rc;
|
||||
}
|
||||
|
||||
bits = (kp->pdata->debounce_ms / 5) - 1;
|
||||
|
||||
scan_val |= (bits << KEYP_SCAN_DBOUNCE_SHIFT);
|
||||
|
||||
bits = fls(kp->pdata->scan_delay_ms) - 1;
|
||||
scan_val |= (bits << KEYP_SCAN_PAUSE_SHIFT);
|
||||
|
||||
/* Row hold time is a multiple of 32KHz cycles. */
|
||||
cycles = (kp->pdata->row_hold_ns * KEYP_CLOCK_FREQ) / NSEC_PER_SEC;
|
||||
|
||||
scan_val |= (cycles << KEYP_SCAN_ROW_HOLD_SHIFT);
|
||||
|
||||
rc = pmic8xxx_kp_write_u8(kp, scan_val, KEYP_SCAN);
|
||||
if (rc)
|
||||
dev_err(kp->dev, "Error writing KEYP_SCAN reg, rc=%d\n", rc);
|
||||
|
||||
return rc;
|
||||
|
||||
}
|
||||
|
||||
static int __devinit pmic8xxx_kp_config_gpio(int gpio_start, int num_gpios,
|
||||
struct pmic8xxx_kp *kp, struct pm_gpio *gpio_config)
|
||||
{
|
||||
int rc, i;
|
||||
|
||||
if (gpio_start < 0 || num_gpios < 0)
|
||||
return -EINVAL;
|
||||
|
||||
for (i = 0; i < num_gpios; i++) {
|
||||
rc = pm8xxx_gpio_config(gpio_start + i, gpio_config);
|
||||
if (rc) {
|
||||
dev_err(kp->dev, "%s: FAIL pm8xxx_gpio_config():"
|
||||
"for PM GPIO [%d] rc=%d.\n",
|
||||
__func__, gpio_start + i, rc);
|
||||
return rc;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int pmic8xxx_kp_enable(struct pmic8xxx_kp *kp)
|
||||
{
|
||||
int rc;
|
||||
|
||||
kp->ctrl_reg |= KEYP_CTRL_KEYP_EN;
|
||||
|
||||
rc = pmic8xxx_kp_write_u8(kp, kp->ctrl_reg, KEYP_CTRL);
|
||||
if (rc < 0)
|
||||
dev_err(kp->dev, "Error writing KEYP_CTRL reg, rc=%d\n", rc);
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int pmic8xxx_kp_disable(struct pmic8xxx_kp *kp)
|
||||
{
|
||||
int rc;
|
||||
|
||||
kp->ctrl_reg &= ~KEYP_CTRL_KEYP_EN;
|
||||
|
||||
rc = pmic8xxx_kp_write_u8(kp, kp->ctrl_reg, KEYP_CTRL);
|
||||
if (rc < 0)
|
||||
return rc;
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int pmic8xxx_kp_open(struct input_dev *dev)
|
||||
{
|
||||
struct pmic8xxx_kp *kp = input_get_drvdata(dev);
|
||||
|
||||
return pmic8xxx_kp_enable(kp);
|
||||
}
|
||||
|
||||
static void pmic8xxx_kp_close(struct input_dev *dev)
|
||||
{
|
||||
struct pmic8xxx_kp *kp = input_get_drvdata(dev);
|
||||
|
||||
pmic8xxx_kp_disable(kp);
|
||||
}
|
||||
|
||||
/*
|
||||
* keypad controller should be initialized in the following sequence
|
||||
* only, otherwise it might get into FSM stuck state.
|
||||
*
|
||||
* - Initialize keypad control parameters, like no. of rows, columns,
|
||||
* timing values etc.,
|
||||
* - configure rows and column gpios pull up/down.
|
||||
* - set irq edge type.
|
||||
* - enable the keypad controller.
|
||||
*/
|
||||
static int __devinit pmic8xxx_kp_probe(struct platform_device *pdev)
|
||||
{
|
||||
const struct pm8xxx_keypad_platform_data *pdata = mfd_get_data(pdev);
|
||||
const struct matrix_keymap_data *keymap_data;
|
||||
struct pmic8xxx_kp *kp;
|
||||
int rc;
|
||||
u8 ctrl_val;
|
||||
|
||||
struct pm_gpio kypd_drv = {
|
||||
.direction = PM_GPIO_DIR_OUT,
|
||||
.output_buffer = PM_GPIO_OUT_BUF_OPEN_DRAIN,
|
||||
.output_value = 0,
|
||||
.pull = PM_GPIO_PULL_NO,
|
||||
.vin_sel = PM_GPIO_VIN_S3,
|
||||
.out_strength = PM_GPIO_STRENGTH_LOW,
|
||||
.function = PM_GPIO_FUNC_1,
|
||||
.inv_int_pol = 1,
|
||||
};
|
||||
|
||||
struct pm_gpio kypd_sns = {
|
||||
.direction = PM_GPIO_DIR_IN,
|
||||
.pull = PM_GPIO_PULL_UP_31P5,
|
||||
.vin_sel = PM_GPIO_VIN_S3,
|
||||
.out_strength = PM_GPIO_STRENGTH_NO,
|
||||
.function = PM_GPIO_FUNC_NORMAL,
|
||||
.inv_int_pol = 1,
|
||||
};
|
||||
|
||||
|
||||
if (!pdata || !pdata->num_cols || !pdata->num_rows ||
|
||||
pdata->num_cols > PM8XXX_MAX_COLS ||
|
||||
pdata->num_rows > PM8XXX_MAX_ROWS ||
|
||||
pdata->num_cols < PM8XXX_MIN_COLS) {
|
||||
dev_err(&pdev->dev, "invalid platform data\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (!pdata->scan_delay_ms ||
|
||||
pdata->scan_delay_ms > MAX_SCAN_DELAY ||
|
||||
pdata->scan_delay_ms < MIN_SCAN_DELAY ||
|
||||
!is_power_of_2(pdata->scan_delay_ms)) {
|
||||
dev_err(&pdev->dev, "invalid keypad scan time supplied\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (!pdata->row_hold_ns ||
|
||||
pdata->row_hold_ns > MAX_ROW_HOLD_DELAY ||
|
||||
pdata->row_hold_ns < MIN_ROW_HOLD_DELAY ||
|
||||
((pdata->row_hold_ns % MIN_ROW_HOLD_DELAY) != 0)) {
|
||||
dev_err(&pdev->dev, "invalid keypad row hold time supplied\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (!pdata->debounce_ms ||
|
||||
((pdata->debounce_ms % 5) != 0) ||
|
||||
pdata->debounce_ms > MAX_DEBOUNCE_TIME ||
|
||||
pdata->debounce_ms < MIN_DEBOUNCE_TIME) {
|
||||
dev_err(&pdev->dev, "invalid debounce time supplied\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
keymap_data = pdata->keymap_data;
|
||||
if (!keymap_data) {
|
||||
dev_err(&pdev->dev, "no keymap data supplied\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
kp = kzalloc(sizeof(*kp), GFP_KERNEL);
|
||||
if (!kp)
|
||||
return -ENOMEM;
|
||||
|
||||
platform_set_drvdata(pdev, kp);
|
||||
|
||||
kp->pdata = pdata;
|
||||
kp->dev = &pdev->dev;
|
||||
|
||||
kp->input = input_allocate_device();
|
||||
if (!kp->input) {
|
||||
dev_err(&pdev->dev, "unable to allocate input device\n");
|
||||
rc = -ENOMEM;
|
||||
goto err_alloc_device;
|
||||
}
|
||||
|
||||
kp->key_sense_irq = platform_get_irq(pdev, 0);
|
||||
if (kp->key_sense_irq < 0) {
|
||||
dev_err(&pdev->dev, "unable to get keypad sense irq\n");
|
||||
rc = -ENXIO;
|
||||
goto err_get_irq;
|
||||
}
|
||||
|
||||
kp->key_stuck_irq = platform_get_irq(pdev, 1);
|
||||
if (kp->key_stuck_irq < 0) {
|
||||
dev_err(&pdev->dev, "unable to get keypad stuck irq\n");
|
||||
rc = -ENXIO;
|
||||
goto err_get_irq;
|
||||
}
|
||||
|
||||
kp->input->name = pdata->input_name ? : "PMIC8XXX keypad";
|
||||
kp->input->phys = pdata->input_phys_device ? : "pmic8xxx_keypad/input0";
|
||||
|
||||
kp->input->dev.parent = &pdev->dev;
|
||||
|
||||
kp->input->id.bustype = BUS_I2C;
|
||||
kp->input->id.version = 0x0001;
|
||||
kp->input->id.product = 0x0001;
|
||||
kp->input->id.vendor = 0x0001;
|
||||
|
||||
kp->input->evbit[0] = BIT_MASK(EV_KEY);
|
||||
|
||||
if (pdata->rep)
|
||||
__set_bit(EV_REP, kp->input->evbit);
|
||||
|
||||
kp->input->keycode = kp->keycodes;
|
||||
kp->input->keycodemax = PM8XXX_MATRIX_MAX_SIZE;
|
||||
kp->input->keycodesize = sizeof(kp->keycodes);
|
||||
kp->input->open = pmic8xxx_kp_open;
|
||||
kp->input->close = pmic8xxx_kp_close;
|
||||
|
||||
matrix_keypad_build_keymap(keymap_data, PM8XXX_ROW_SHIFT,
|
||||
kp->input->keycode, kp->input->keybit);
|
||||
|
||||
input_set_capability(kp->input, EV_MSC, MSC_SCAN);
|
||||
input_set_drvdata(kp->input, kp);
|
||||
|
||||
/* initialize keypad state */
|
||||
memset(kp->keystate, 0xff, sizeof(kp->keystate));
|
||||
memset(kp->stuckstate, 0xff, sizeof(kp->stuckstate));
|
||||
|
||||
rc = pmic8xxx_kpd_init(kp);
|
||||
if (rc < 0) {
|
||||
dev_err(&pdev->dev, "unable to initialize keypad controller\n");
|
||||
goto err_get_irq;
|
||||
}
|
||||
|
||||
rc = pmic8xxx_kp_config_gpio(pdata->cols_gpio_start,
|
||||
pdata->num_cols, kp, &kypd_sns);
|
||||
if (rc < 0) {
|
||||
dev_err(&pdev->dev, "unable to configure keypad sense lines\n");
|
||||
goto err_gpio_config;
|
||||
}
|
||||
|
||||
rc = pmic8xxx_kp_config_gpio(pdata->rows_gpio_start,
|
||||
pdata->num_rows, kp, &kypd_drv);
|
||||
if (rc < 0) {
|
||||
dev_err(&pdev->dev, "unable to configure keypad drive lines\n");
|
||||
goto err_gpio_config;
|
||||
}
|
||||
|
||||
rc = request_any_context_irq(kp->key_sense_irq, pmic8xxx_kp_irq,
|
||||
IRQF_TRIGGER_RISING, "pmic-keypad", kp);
|
||||
if (rc < 0) {
|
||||
dev_err(&pdev->dev, "failed to request keypad sense irq\n");
|
||||
goto err_get_irq;
|
||||
}
|
||||
|
||||
rc = request_any_context_irq(kp->key_stuck_irq, pmic8xxx_kp_stuck_irq,
|
||||
IRQF_TRIGGER_RISING, "pmic-keypad-stuck", kp);
|
||||
if (rc < 0) {
|
||||
dev_err(&pdev->dev, "failed to request keypad stuck irq\n");
|
||||
goto err_req_stuck_irq;
|
||||
}
|
||||
|
||||
rc = pmic8xxx_kp_read_u8(kp, &ctrl_val, KEYP_CTRL);
|
||||
if (rc < 0) {
|
||||
dev_err(&pdev->dev, "failed to read KEYP_CTRL register\n");
|
||||
goto err_pmic_reg_read;
|
||||
}
|
||||
|
||||
kp->ctrl_reg = ctrl_val;
|
||||
|
||||
rc = input_register_device(kp->input);
|
||||
if (rc < 0) {
|
||||
dev_err(&pdev->dev, "unable to register keypad input device\n");
|
||||
goto err_pmic_reg_read;
|
||||
}
|
||||
|
||||
device_init_wakeup(&pdev->dev, pdata->wakeup);
|
||||
|
||||
return 0;
|
||||
|
||||
err_pmic_reg_read:
|
||||
free_irq(kp->key_stuck_irq, NULL);
|
||||
err_req_stuck_irq:
|
||||
free_irq(kp->key_sense_irq, NULL);
|
||||
err_gpio_config:
|
||||
err_get_irq:
|
||||
input_free_device(kp->input);
|
||||
err_alloc_device:
|
||||
platform_set_drvdata(pdev, NULL);
|
||||
kfree(kp);
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int __devexit pmic8xxx_kp_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct pmic8xxx_kp *kp = platform_get_drvdata(pdev);
|
||||
|
||||
device_init_wakeup(&pdev->dev, 0);
|
||||
free_irq(kp->key_stuck_irq, NULL);
|
||||
free_irq(kp->key_sense_irq, NULL);
|
||||
input_unregister_device(kp->input);
|
||||
kfree(kp);
|
||||
|
||||
platform_set_drvdata(pdev, NULL);
|
||||
return 0;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM_SLEEP
|
||||
static int pmic8xxx_kp_suspend(struct device *dev)
|
||||
{
|
||||
struct platform_device *pdev = to_platform_device(dev);
|
||||
struct pmic8xxx_kp *kp = platform_get_drvdata(pdev);
|
||||
struct input_dev *input_dev = kp->input;
|
||||
|
||||
if (device_may_wakeup(dev)) {
|
||||
enable_irq_wake(kp->key_sense_irq);
|
||||
} else {
|
||||
mutex_lock(&input_dev->mutex);
|
||||
|
||||
if (input_dev->users)
|
||||
pmic8xxx_kp_disable(kp);
|
||||
|
||||
mutex_unlock(&input_dev->mutex);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int pmic8xxx_kp_resume(struct device *dev)
|
||||
{
|
||||
struct platform_device *pdev = to_platform_device(dev);
|
||||
struct pmic8xxx_kp *kp = platform_get_drvdata(pdev);
|
||||
struct input_dev *input_dev = kp->input;
|
||||
|
||||
if (device_may_wakeup(dev)) {
|
||||
disable_irq_wake(kp->key_sense_irq);
|
||||
} else {
|
||||
mutex_lock(&input_dev->mutex);
|
||||
|
||||
if (input_dev->users)
|
||||
pmic8xxx_kp_enable(kp);
|
||||
|
||||
mutex_unlock(&input_dev->mutex);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
static SIMPLE_DEV_PM_OPS(pm8xxx_kp_pm_ops,
|
||||
pmic8xxx_kp_suspend, pmic8xxx_kp_resume);
|
||||
|
||||
static struct platform_driver pmic8xxx_kp_driver = {
|
||||
.probe = pmic8xxx_kp_probe,
|
||||
.remove = __devexit_p(pmic8xxx_kp_remove),
|
||||
.driver = {
|
||||
.name = PM8XXX_KEYPAD_DEV_NAME,
|
||||
.owner = THIS_MODULE,
|
||||
.pm = &pm8xxx_kp_pm_ops,
|
||||
},
|
||||
};
|
||||
|
||||
static int __init pmic8xxx_kp_init(void)
|
||||
{
|
||||
return platform_driver_register(&pmic8xxx_kp_driver);
|
||||
}
|
||||
module_init(pmic8xxx_kp_init);
|
||||
|
||||
static void __exit pmic8xxx_kp_exit(void)
|
||||
{
|
||||
platform_driver_unregister(&pmic8xxx_kp_driver);
|
||||
}
|
||||
module_exit(pmic8xxx_kp_exit);
|
||||
|
||||
MODULE_LICENSE("GPL v2");
|
||||
MODULE_DESCRIPTION("PMIC8XXX keypad driver");
|
||||
MODULE_VERSION("1.0");
|
||||
MODULE_ALIAS("platform:pmic8xxx_keypad");
|
||||
MODULE_AUTHOR("Trilok Soni <tsoni@codeaurora.org>");
|
||||
52
include/linux/input/pmic8xxx-keypad.h
Normal file
52
include/linux/input/pmic8xxx-keypad.h
Normal file
|
|
@ -0,0 +1,52 @@
|
|||
/* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 and
|
||||
* only version 2 as published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*/
|
||||
|
||||
#ifndef __PMIC8XXX_KEYPAD_H__
|
||||
#define __PMIC8XXX_KEYPAD_H__
|
||||
|
||||
#include <linux/input/matrix_keypad.h>
|
||||
|
||||
#define PM8XXX_KEYPAD_DEV_NAME "pm8xxx-keypad"
|
||||
|
||||
/**
|
||||
* struct pm8xxx_keypad_platform_data - platform data for keypad
|
||||
* @keymap_data - matrix keymap data
|
||||
* @input_name - input device name
|
||||
* @input_phys_device - input device name
|
||||
* @num_cols - number of columns of keypad
|
||||
* @num_rows - number of row of keypad
|
||||
* @debounce_ms - debounce period in milliseconds
|
||||
* @scan_delay_ms - scan delay in milliseconds
|
||||
* @row_hold_ns - row hold period in nanoseconds
|
||||
* @wakeup - configure keypad as wakeup
|
||||
* @rep - enable or disable key repeat bit
|
||||
*/
|
||||
struct pm8xxx_keypad_platform_data {
|
||||
const struct matrix_keymap_data *keymap_data;
|
||||
|
||||
const char *input_name;
|
||||
const char *input_phys_device;
|
||||
|
||||
unsigned int num_cols;
|
||||
unsigned int num_rows;
|
||||
unsigned int rows_gpio_start;
|
||||
unsigned int cols_gpio_start;
|
||||
|
||||
unsigned int debounce_ms;
|
||||
unsigned int scan_delay_ms;
|
||||
unsigned int row_hold_ns;
|
||||
|
||||
bool wakeup;
|
||||
bool rep;
|
||||
};
|
||||
|
||||
#endif /*__PMIC8XXX_KEYPAD_H__ */
|
||||
Loading…
Reference in a new issue