forked from luck/tmp_suning_uos_patched
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
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@ -412,6 +412,17 @@ config KEYBOARD_PXA930_ROTARY
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To compile this driver as a module, choose M here: the
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module will be called pxa930_rotary.
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config KEYBOARD_PMIC8XXX
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tristate "Qualcomm PMIC8XXX keypad support"
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depends on MFD_PM8XXX
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help
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Say Y here if you want to enable the driver for the PMIC8XXX
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keypad provided as a reference design from Qualcomm. This is intended
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to support upto 18x8 matrix based keypad design.
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To compile this driver as a module, choose M here: the module will
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be called pmic8xxx-keypad.
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config KEYBOARD_SAMSUNG
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tristate "Samsung keypad support"
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depends on SAMSUNG_DEV_KEYPAD
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@ -34,6 +34,7 @@ obj-$(CONFIG_KEYBOARD_NOMADIK) += nomadik-ske-keypad.o
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obj-$(CONFIG_KEYBOARD_OMAP) += omap-keypad.o
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obj-$(CONFIG_KEYBOARD_OMAP4) += omap4-keypad.o
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obj-$(CONFIG_KEYBOARD_OPENCORES) += opencores-kbd.o
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obj-$(CONFIG_KEYBOARD_PMIC8XXX) += pmic8xxx-keypad.o
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obj-$(CONFIG_KEYBOARD_PXA27x) += pxa27x_keypad.o
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obj-$(CONFIG_KEYBOARD_PXA930_ROTARY) += pxa930_rotary.o
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obj-$(CONFIG_KEYBOARD_QT1070) += qt1070.o
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799
drivers/input/keyboard/pmic8xxx-keypad.c
Normal file
799
drivers/input/keyboard/pmic8xxx-keypad.c
Normal file
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@ -0,0 +1,799 @@
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/* Copyright (c) 2009-2011, Code Aurora Forum. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/kernel.h>
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#include <linux/interrupt.h>
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#include <linux/slab.h>
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#include <linux/input.h>
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#include <linux/bitops.h>
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#include <linux/delay.h>
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#include <linux/mutex.h>
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#include <linux/mfd/pm8xxx/core.h>
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#include <linux/mfd/pm8xxx/gpio.h>
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#include <linux/input/pmic8xxx-keypad.h>
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#define PM8XXX_MAX_ROWS 18
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#define PM8XXX_MAX_COLS 8
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#define PM8XXX_ROW_SHIFT 3
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#define PM8XXX_MATRIX_MAX_SIZE (PM8XXX_MAX_ROWS * PM8XXX_MAX_COLS)
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#define PM8XXX_MIN_ROWS 5
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#define PM8XXX_MIN_COLS 5
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#define MAX_SCAN_DELAY 128
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#define MIN_SCAN_DELAY 1
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/* in nanoseconds */
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#define MAX_ROW_HOLD_DELAY 122000
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#define MIN_ROW_HOLD_DELAY 30500
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#define MAX_DEBOUNCE_TIME 20
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#define MIN_DEBOUNCE_TIME 5
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#define KEYP_CTRL 0x148
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#define KEYP_CTRL_EVNTS BIT(0)
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#define KEYP_CTRL_EVNTS_MASK 0x3
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#define KEYP_CTRL_SCAN_COLS_SHIFT 5
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#define KEYP_CTRL_SCAN_COLS_MIN 5
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#define KEYP_CTRL_SCAN_COLS_BITS 0x3
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#define KEYP_CTRL_SCAN_ROWS_SHIFT 2
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#define KEYP_CTRL_SCAN_ROWS_MIN 5
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#define KEYP_CTRL_SCAN_ROWS_BITS 0x7
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#define KEYP_CTRL_KEYP_EN BIT(7)
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#define KEYP_SCAN 0x149
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#define KEYP_SCAN_READ_STATE BIT(0)
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#define KEYP_SCAN_DBOUNCE_SHIFT 1
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#define KEYP_SCAN_PAUSE_SHIFT 3
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#define KEYP_SCAN_ROW_HOLD_SHIFT 6
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#define KEYP_TEST 0x14A
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#define KEYP_TEST_CLEAR_RECENT_SCAN BIT(6)
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#define KEYP_TEST_CLEAR_OLD_SCAN BIT(5)
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#define KEYP_TEST_READ_RESET BIT(4)
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#define KEYP_TEST_DTEST_EN BIT(3)
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#define KEYP_TEST_ABORT_READ BIT(0)
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#define KEYP_TEST_DBG_SELECT_SHIFT 1
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/* bits of these registers represent
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* '0' for key press
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* '1' for key release
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*/
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#define KEYP_RECENT_DATA 0x14B
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#define KEYP_OLD_DATA 0x14C
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#define KEYP_CLOCK_FREQ 32768
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/**
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* struct pmic8xxx_kp - internal keypad data structure
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* @pdata - keypad platform data pointer
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* @input - input device pointer for keypad
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* @key_sense_irq - key press/release irq number
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* @key_stuck_irq - key stuck notification irq number
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* @keycodes - array to hold the key codes
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* @dev - parent device pointer
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* @keystate - present key press/release state
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* @stuckstate - present state when key stuck irq
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* @ctrl_reg - control register value
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*/
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struct pmic8xxx_kp {
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const struct pm8xxx_keypad_platform_data *pdata;
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struct input_dev *input;
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int key_sense_irq;
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int key_stuck_irq;
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unsigned short keycodes[PM8XXX_MATRIX_MAX_SIZE];
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struct device *dev;
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u16 keystate[PM8XXX_MAX_ROWS];
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u16 stuckstate[PM8XXX_MAX_ROWS];
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u8 ctrl_reg;
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};
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static int pmic8xxx_kp_write_u8(struct pmic8xxx_kp *kp,
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u8 data, u16 reg)
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{
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int rc;
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rc = pm8xxx_writeb(kp->dev->parent, reg, data);
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return rc;
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}
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static int pmic8xxx_kp_read(struct pmic8xxx_kp *kp,
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u8 *data, u16 reg, unsigned num_bytes)
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{
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int rc;
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rc = pm8xxx_read_buf(kp->dev->parent, reg, data, num_bytes);
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return rc;
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}
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static int pmic8xxx_kp_read_u8(struct pmic8xxx_kp *kp,
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u8 *data, u16 reg)
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{
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int rc;
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rc = pmic8xxx_kp_read(kp, data, reg, 1);
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return rc;
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}
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static u8 pmic8xxx_col_state(struct pmic8xxx_kp *kp, u8 col)
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{
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/* all keys pressed on that particular row? */
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if (col == 0x00)
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return 1 << kp->pdata->num_cols;
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else
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return col & ((1 << kp->pdata->num_cols) - 1);
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}
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/*
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* Synchronous read protocol for RevB0 onwards:
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*
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* 1. Write '1' to ReadState bit in KEYP_SCAN register
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* 2. Wait 2*32KHz clocks, so that HW can successfully enter read mode
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* synchronously
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* 3. Read rows in old array first if events are more than one
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* 4. Read rows in recent array
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* 5. Wait 4*32KHz clocks
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* 6. Write '0' to ReadState bit of KEYP_SCAN register so that hw can
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* synchronously exit read mode.
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*/
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static int pmic8xxx_chk_sync_read(struct pmic8xxx_kp *kp)
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{
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int rc;
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u8 scan_val;
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rc = pmic8xxx_kp_read_u8(kp, &scan_val, KEYP_SCAN);
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if (rc < 0) {
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dev_err(kp->dev, "Error reading KEYP_SCAN reg, rc=%d\n", rc);
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return rc;
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}
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scan_val |= 0x1;
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rc = pmic8xxx_kp_write_u8(kp, scan_val, KEYP_SCAN);
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if (rc < 0) {
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dev_err(kp->dev, "Error writing KEYP_SCAN reg, rc=%d\n", rc);
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return rc;
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}
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/* 2 * 32KHz clocks */
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udelay((2 * DIV_ROUND_UP(USEC_PER_SEC, KEYP_CLOCK_FREQ)) + 1);
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return rc;
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}
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static int pmic8xxx_kp_read_data(struct pmic8xxx_kp *kp, u16 *state,
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u16 data_reg, int read_rows)
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{
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int rc, row;
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u8 new_data[PM8XXX_MAX_ROWS];
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rc = pmic8xxx_kp_read(kp, new_data, data_reg, read_rows);
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if (rc)
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return rc;
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for (row = 0; row < kp->pdata->num_rows; row++) {
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dev_dbg(kp->dev, "new_data[%d] = %d\n", row,
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new_data[row]);
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state[row] = pmic8xxx_col_state(kp, new_data[row]);
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}
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return rc;
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}
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static int pmic8xxx_kp_read_matrix(struct pmic8xxx_kp *kp, u16 *new_state,
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u16 *old_state)
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{
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int rc, read_rows;
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u8 scan_val;
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if (kp->pdata->num_rows < PM8XXX_MIN_ROWS)
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read_rows = PM8XXX_MIN_ROWS;
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else
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read_rows = kp->pdata->num_rows;
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pmic8xxx_chk_sync_read(kp);
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if (old_state) {
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rc = pmic8xxx_kp_read_data(kp, old_state, KEYP_OLD_DATA,
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read_rows);
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if (rc < 0) {
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dev_err(kp->dev,
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"Error reading KEYP_OLD_DATA, rc=%d\n", rc);
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return rc;
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}
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}
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rc = pmic8xxx_kp_read_data(kp, new_state, KEYP_RECENT_DATA,
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read_rows);
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if (rc < 0) {
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dev_err(kp->dev,
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"Error reading KEYP_RECENT_DATA, rc=%d\n", rc);
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return rc;
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}
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/* 4 * 32KHz clocks */
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udelay((4 * DIV_ROUND_UP(USEC_PER_SEC, KEYP_CLOCK_FREQ)) + 1);
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rc = pmic8xxx_kp_read_u8(kp, &scan_val, KEYP_SCAN);
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if (rc < 0) {
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dev_err(kp->dev, "Error reading KEYP_SCAN reg, rc=%d\n", rc);
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return rc;
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}
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scan_val &= 0xFE;
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rc = pmic8xxx_kp_write_u8(kp, scan_val, KEYP_SCAN);
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if (rc < 0)
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dev_err(kp->dev, "Error writing KEYP_SCAN reg, rc=%d\n", rc);
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return rc;
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}
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static void __pmic8xxx_kp_scan_matrix(struct pmic8xxx_kp *kp, u16 *new_state,
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u16 *old_state)
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{
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int row, col, code;
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for (row = 0; row < kp->pdata->num_rows; row++) {
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int bits_changed = new_state[row] ^ old_state[row];
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if (!bits_changed)
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continue;
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for (col = 0; col < kp->pdata->num_cols; col++) {
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if (!(bits_changed & (1 << col)))
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continue;
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dev_dbg(kp->dev, "key [%d:%d] %s\n", row, col,
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!(new_state[row] & (1 << col)) ?
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"pressed" : "released");
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code = MATRIX_SCAN_CODE(row, col, PM8XXX_ROW_SHIFT);
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input_event(kp->input, EV_MSC, MSC_SCAN, code);
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input_report_key(kp->input,
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kp->keycodes[code],
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!(new_state[row] & (1 << col)));
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input_sync(kp->input);
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}
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}
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}
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static bool pmic8xxx_detect_ghost_keys(struct pmic8xxx_kp *kp, u16 *new_state)
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{
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int row, found_first = -1;
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u16 check, row_state;
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check = 0;
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for (row = 0; row < kp->pdata->num_rows; row++) {
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row_state = (~new_state[row]) &
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((1 << kp->pdata->num_cols) - 1);
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if (hweight16(row_state) > 1) {
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if (found_first == -1)
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found_first = row;
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if (check & row_state) {
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dev_dbg(kp->dev, "detected ghost key on row[%d]"
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" and row[%d]\n", found_first, row);
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return true;
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}
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}
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check |= row_state;
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}
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return false;
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}
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static int pmic8xxx_kp_scan_matrix(struct pmic8xxx_kp *kp, unsigned int events)
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{
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u16 new_state[PM8XXX_MAX_ROWS];
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u16 old_state[PM8XXX_MAX_ROWS];
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int rc;
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switch (events) {
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case 0x1:
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rc = pmic8xxx_kp_read_matrix(kp, new_state, NULL);
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if (rc < 0)
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return rc;
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/* detecting ghost key is not an error */
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if (pmic8xxx_detect_ghost_keys(kp, new_state))
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return 0;
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__pmic8xxx_kp_scan_matrix(kp, new_state, kp->keystate);
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memcpy(kp->keystate, new_state, sizeof(new_state));
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break;
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case 0x3: /* two events - eventcounter is gray-coded */
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rc = pmic8xxx_kp_read_matrix(kp, new_state, old_state);
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if (rc < 0)
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return rc;
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__pmic8xxx_kp_scan_matrix(kp, old_state, kp->keystate);
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__pmic8xxx_kp_scan_matrix(kp, new_state, old_state);
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memcpy(kp->keystate, new_state, sizeof(new_state));
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break;
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case 0x2:
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dev_dbg(kp->dev, "Some key events were lost\n");
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rc = pmic8xxx_kp_read_matrix(kp, new_state, old_state);
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if (rc < 0)
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return rc;
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__pmic8xxx_kp_scan_matrix(kp, old_state, kp->keystate);
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__pmic8xxx_kp_scan_matrix(kp, new_state, old_state);
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memcpy(kp->keystate, new_state, sizeof(new_state));
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break;
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default:
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rc = -EINVAL;
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}
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return rc;
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}
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/*
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* NOTE: We are reading recent and old data registers blindly
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* whenever key-stuck interrupt happens, because events counter doesn't
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* get updated when this interrupt happens due to key stuck doesn't get
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* considered as key state change.
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*
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* We are not using old data register contents after they are being read
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* because it might report the key which was pressed before the key being stuck
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* as stuck key because it's pressed status is stored in the old data
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* register.
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*/
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static irqreturn_t pmic8xxx_kp_stuck_irq(int irq, void *data)
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{
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u16 new_state[PM8XXX_MAX_ROWS];
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u16 old_state[PM8XXX_MAX_ROWS];
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int rc;
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struct pmic8xxx_kp *kp = data;
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rc = pmic8xxx_kp_read_matrix(kp, new_state, old_state);
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if (rc < 0) {
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dev_err(kp->dev, "failed to read keypad matrix\n");
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return IRQ_HANDLED;
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}
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__pmic8xxx_kp_scan_matrix(kp, new_state, kp->stuckstate);
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return IRQ_HANDLED;
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}
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static irqreturn_t pmic8xxx_kp_irq(int irq, void *data)
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{
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struct pmic8xxx_kp *kp = data;
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u8 ctrl_val, events;
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int rc;
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rc = pmic8xxx_kp_read(kp, &ctrl_val, KEYP_CTRL, 1);
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if (rc < 0) {
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dev_err(kp->dev, "failed to read keyp_ctrl register\n");
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return IRQ_HANDLED;
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}
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events = ctrl_val & KEYP_CTRL_EVNTS_MASK;
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rc = pmic8xxx_kp_scan_matrix(kp, events);
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if (rc < 0)
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dev_err(kp->dev, "failed to scan matrix\n");
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return IRQ_HANDLED;
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}
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static int __devinit pmic8xxx_kpd_init(struct pmic8xxx_kp *kp)
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{
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int bits, rc, cycles;
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u8 scan_val = 0, ctrl_val = 0;
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static const u8 row_bits[] = {
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0, 1, 2, 3, 4, 4, 5, 5, 6, 6, 6, 7, 7, 7,
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};
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/* Find column bits */
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if (kp->pdata->num_cols < KEYP_CTRL_SCAN_COLS_MIN)
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bits = 0;
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else
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bits = kp->pdata->num_cols - KEYP_CTRL_SCAN_COLS_MIN;
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ctrl_val = (bits & KEYP_CTRL_SCAN_COLS_BITS) <<
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KEYP_CTRL_SCAN_COLS_SHIFT;
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/* 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 New Issue
Block a user