Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756905Ab1BANsZ (ORCPT ); Tue, 1 Feb 2011 08:48:25 -0500 Received: from wolverine01.qualcomm.com ([199.106.114.254]:7704 "EHLO wolverine01.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756790Ab1BANsV (ORCPT ); Tue, 1 Feb 2011 08:48:21 -0500 X-IronPort-AV: E=McAfee;i="5400,1158,6243"; a="72780249" From: Anirudh Ghayal To: linux-kernel@vger.kernel.org Cc: linux-input@vger.kernel.org, rtc-linux@googlegroups.com, linux-arm-msm@vger.kernel.org, Trilok Soni , Dmitry Torokhov Subject: [RFC v2 PATCH 2/7] input: pm8058_keypad: Qualcomm PMIC8058 keypad controller driver Date: Tue, 1 Feb 2011 19:17:38 +0530 Message-Id: <1296568063-12010-3-git-send-email-aghayal@codeaurora.org> X-Mailer: git-send-email 1.7.3.5 In-Reply-To: <1296568063-12010-1-git-send-email-aghayal@codeaurora.org> References: <1296568063-12010-1-git-send-email-aghayal@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 23971 Lines: 882 From: Trilok Soni Add Qualcomm PMIC8058 based keypad controller driver supporting upto 18x8 matrix configuration. Cc: Dmitry Torokhov Signed-off-by: Trilok Soni --- Changes from v1: Addressed review comments from Dmitry. Race condition handling in suspend/resume Statically allocate keycode array. drivers/input/keyboard/Kconfig | 11 + drivers/input/keyboard/Makefile | 1 + drivers/input/keyboard/pmic8058-keypad.c | 754 ++++++++++++++++++++++++++++++ include/linux/input/pmic8058-keypad.h | 53 +++ 4 files changed, 819 insertions(+), 0 deletions(-) create mode 100644 drivers/input/keyboard/pmic8058-keypad.c create mode 100644 include/linux/input/pmic8058-keypad.h diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig index 4175073..e85fe36 100644 --- a/drivers/input/keyboard/Kconfig +++ b/drivers/input/keyboard/Kconfig @@ -370,6 +370,17 @@ config KEYBOARD_PXA930_ROTARY To compile this driver as a module, choose M here: the module will be called pxa930_rotary. +config KEYBOARD_PMIC8058 + tristate "Qualcomm PMIC8058 keypad support" + depends on PMIC8058 + help + Say Y here if you want to enable the driver for the PMIC8058 + 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 pmic8058-keypad. + config KEYBOARD_SAMSUNG tristate "Samsung keypad support" depends on SAMSUNG_DEV_KEYPAD diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile index 4e5571b..23e82cf 100644 --- a/drivers/input/keyboard/Makefile +++ b/drivers/input/keyboard/Makefile @@ -34,6 +34,7 @@ obj-$(CONFIG_KEYBOARD_OMAP4) += omap4-keypad.o obj-$(CONFIG_KEYBOARD_OPENCORES) += opencores-kbd.o obj-$(CONFIG_KEYBOARD_PXA27x) += pxa27x_keypad.o obj-$(CONFIG_KEYBOARD_PXA930_ROTARY) += pxa930_rotary.o +obj-$(CONFIG_KEYBOARD_PMIC8058) += pmic8058-keypad.o obj-$(CONFIG_KEYBOARD_QT2160) += qt2160.o obj-$(CONFIG_KEYBOARD_SAMSUNG) += samsung-keypad.o obj-$(CONFIG_KEYBOARD_SH_KEYSC) += sh_keysc.o diff --git a/drivers/input/keyboard/pmic8058-keypad.c b/drivers/input/keyboard/pmic8058-keypad.c new file mode 100644 index 0000000..9f641a1 --- /dev/null +++ b/drivers/input/keyboard/pmic8058-keypad.c @@ -0,0 +1,754 @@ +/* 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#define PM8058_MAX_ROWS 18 +#define PM8058_MAX_COLS 8 +#define PM8058_ROW_SHIFT 3 +#define PM8058_MATRIX_MAX_SIZE (PM8058_MAX_ROWS * PM8058_MAX_COLS) + +#define PM8058_MIN_ROWS 5 +#define PM8058_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 pmic8058_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 + * @pm_chip - parent MFD core device + * @ctrl_reg - control register value + */ +struct pmic8058_kp { + const struct pmic8058_keypad_data *pdata; + struct input_dev *input; + int key_sense_irq; + int key_stuck_irq; + + unsigned short keycodes[PM8058_MATRIX_MAX_SIZE]; + + struct device *dev; + u16 keystate[PM8058_MAX_ROWS]; + u16 stuckstate[PM8058_MAX_ROWS]; + + struct pm8058_chip *pm_chip; + + u8 ctrl_reg; +}; + +static int pmic8058_kp_write_u8(struct pmic8058_kp *kp, + u8 data, u16 reg) +{ + int rc; + + rc = pm8058_write(kp->pm_chip, reg, &data, 1); + if (rc < 0) + dev_warn(kp->dev, "Error writing pmic8058: %X - ret %X\n", + reg, rc); + return rc; +} + +static int pmic8058_kp_read(struct pmic8058_kp *kp, + u8 *data, u16 reg, unsigned num_bytes) +{ + int rc; + + rc = pm8058_read(kp->pm_chip, reg, data, num_bytes); + if (rc < 0) + dev_warn(kp->dev, "Error reading pmic8058: %X - ret %X\n", + reg, rc); + + return rc; +} + +static int pmic8058_kp_read_u8(struct pmic8058_kp *kp, + u8 *data, u16 reg) +{ + int rc; + + rc = pmic8058_kp_read(kp, data, reg, 1); + if (rc < 0) + dev_warn(kp->dev, "Error reading pmic8058: %X - ret %X\n", + reg, rc); + return rc; +} + +static u8 pmic8058_col_state(struct pmic8058_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 pmic8058_chk_sync_read(struct pmic8058_kp *kp) +{ + int rc; + u8 scan_val; + + rc = pmic8058_kp_read_u8(kp, &scan_val, KEYP_SCAN); + if (rc < 0) + return rc; + + scan_val |= 0x1; + + rc = pmic8058_kp_write_u8(kp, scan_val, KEYP_SCAN); + if (rc < 0) + return rc; + + /* 2 * 32KHz clocks */ + udelay((2 * DIV_ROUND_UP(USEC_PER_SEC, KEYP_CLOCK_FREQ)) + 1); + + return rc; +} + +static int pmic8058_kp_read_data(struct pmic8058_kp *kp, u16 *state, + u16 data_reg, int read_rows) +{ + int rc, row; + u8 new_data[PM8058_MAX_ROWS]; + + rc = pmic8058_kp_read(kp, new_data, data_reg, read_rows); + + if (!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] = pmic8058_col_state(kp, new_data[row]); + } + } + + return rc; +} + +static int pmic8058_kp_read_matrix(struct pmic8058_kp *kp, u16 *new_state, + u16 *old_state) +{ + int rc, read_rows; + u8 scan_val; + + read_rows = kp->pdata->num_rows; + + pmic8058_chk_sync_read(kp); + + if (old_state) { + rc = pmic8058_kp_read_data(kp, old_state, KEYP_OLD_DATA, + read_rows); + if (rc < 0) + return rc; + } + + rc = pmic8058_kp_read_data(kp, new_state, KEYP_RECENT_DATA, + read_rows); + if (rc < 0) + return rc; + + /* 4 * 32KHz clocks */ + udelay((4 * DIV_ROUND_UP(USEC_PER_SEC, KEYP_CLOCK_FREQ)) + 1); + + rc = pmic8058_kp_read_u8(kp, &scan_val, KEYP_SCAN); + if (rc < 0) + return rc; + scan_val &= 0xFE; + rc = pmic8058_kp_write_u8(kp, scan_val, KEYP_SCAN); + if (rc < 0) + return rc; + + return rc; +} + +static void __pmic8058_kp_scan_matrix(struct pmic8058_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, PM8058_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 pmic8058_detect_ghost_keys(struct pmic8058_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 pmic8058_kp_scan_matrix(struct pmic8058_kp *kp, unsigned int events) +{ + u16 new_state[PM8058_MAX_ROWS]; + u16 old_state[PM8058_MAX_ROWS]; + int rc; + + switch (events) { + case 0x1: + rc = pmic8058_kp_read_matrix(kp, new_state, NULL); + if (rc < 0) + return rc; + + /* detecting ghost key is not an error */ + if (pmic8058_detect_ghost_keys(kp, new_state)) + return 0; + __pmic8058_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 = pmic8058_kp_read_matrix(kp, new_state, old_state); + if (rc < 0) + return rc; + + __pmic8058_kp_scan_matrix(kp, old_state, kp->keystate); + __pmic8058_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 = pmic8058_kp_read_matrix(kp, new_state, old_state); + if (rc < 0) + return rc; + __pmic8058_kp_scan_matrix(kp, old_state, kp->keystate); + __pmic8058_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 pmic8058_kp_stuck_irq(int irq, void *data) +{ + u16 new_state[PM8058_MAX_ROWS]; + u16 old_state[PM8058_MAX_ROWS]; + int rc; + struct pmic8058_kp *kp = data; + + rc = pmic8058_kp_read_matrix(kp, new_state, old_state); + if (rc < 0) { + dev_err(kp->dev, "failed to read keypad matrix\n"); + return IRQ_HANDLED; + } + + __pmic8058_kp_scan_matrix(kp, new_state, kp->stuckstate); + + return IRQ_HANDLED; +} + +static irqreturn_t pmic8058_kp_irq(int irq, void *data) +{ + struct pmic8058_kp *kp = data; + u8 ctrl_val, events; + int rc; + + rc = pmic8058_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 = pmic8058_kp_scan_matrix(kp, events); + if (rc < 0) + dev_err(kp->dev, "failed to scan matrix\n"); + + return IRQ_HANDLED; +} + +static int pmic8058_kpd_init(struct pmic8058_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 = pmic8058_kp_write_u8(kp, ctrl_val, KEYP_CTRL); + if (rc < 0) + 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 = pmic8058_kp_write_u8(kp, scan_val, KEYP_SCAN); + + return rc; +} + +static int pmic8058_kp_enable(struct pmic8058_kp *kp) +{ + int rc; + + kp->ctrl_reg |= KEYP_CTRL_KEYP_EN; + + rc = pmic8058_kp_write_u8(kp, kp->ctrl_reg, KEYP_CTRL); + if (rc < 0) + return rc; + + return rc; +} + +static int pmic8058_kp_disable(struct pmic8058_kp *kp) +{ + int rc; + + kp->ctrl_reg &= ~KEYP_CTRL_KEYP_EN; + + rc = pmic8058_kp_write_u8(kp, kp->ctrl_reg, KEYP_CTRL); + if (rc < 0) + return rc; + + return rc; +} + +static int pmic8058_kp_open(struct input_dev *dev) +{ + struct pmic8058_kp *kp = input_get_drvdata(dev); + + return pmic8058_kp_enable(kp); +} + +static void pmic8058_kp_close(struct input_dev *dev) +{ + struct pmic8058_kp *kp = input_get_drvdata(dev); + + pmic8058_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 pmic8058_kp_probe(struct platform_device *pdev) +{ + struct pmic8058_keypad_data *pdata = pdev->dev.platform_data; + const struct matrix_keymap_data *keymap_data; + struct pmic8058_kp *kp; + int rc; + u8 ctrl_val; + struct pm8058_chip *pm_chip; + + pm_chip = platform_get_drvdata(pdev); + if (pm_chip == NULL) { + dev_err(&pdev->dev, "no parent data passed in\n"); + return -EINVAL; + } + + /* Check PMIC8058 version. 1.0 version is not supported */ + if (pm8058_rev(pm_chip) == PM_8058_REV_1p0) { + dev_err(&pdev->dev, "PMIC8058 1.0 version is not supported\n"); + return -ENODEV; + } + + if (!pdata || !pdata->num_cols || !pdata->num_rows || + pdata->num_cols > PM8058_MAX_COLS || + pdata->num_rows > PM8058_MAX_ROWS || + pdata->num_cols < PM8058_MIN_COLS || + pdata->num_rows < PM8058_MIN_ROWS) { + 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->pm_chip = pm_chip; + + 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 ? : "PMIC8058 keypad"; + kp->input->phys = pdata->input_phys_device ? : "pmic8058_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 = PM8058_MATRIX_MAX_SIZE; + kp->input->keycodesize = sizeof(kp->keycodes); + kp->input->open = pmic8058_kp_open; + kp->input->close = pmic8058_kp_close; + + matrix_keypad_build_keymap(keymap_data, PM8058_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 = pmic8058_kpd_init(kp); + if (rc < 0) { + dev_err(&pdev->dev, "unable to initialize keypad controller\n"); + goto err_kpd_init; + } + + rc = request_any_context_irq(kp->key_sense_irq, pmic8058_kp_irq, + IRQF_TRIGGER_RISING, "pmic-keypad", kp); + if (rc < 0) { + dev_err(&pdev->dev, "failed to request keypad sense irq\n"); + goto err_req_sense_irq; + } + + rc = request_any_context_irq(kp->key_stuck_irq, pmic8058_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 = pmic8058_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_reg_input_dev; + } + + device_init_wakeup(&pdev->dev, pdata->wakeup); + + return 0; + +err_reg_input_dev: +err_pmic_reg_read: + free_irq(kp->key_stuck_irq, NULL); +err_req_stuck_irq: + free_irq(kp->key_sense_irq, NULL); +err_req_sense_irq: +err_kpd_init: +err_get_irq: + input_free_device(kp->input); +err_alloc_device: + kfree(kp); + return rc; +} + +static int __devexit pmic8058_kp_remove(struct platform_device *pdev) +{ + struct pmic8058_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); + + return 0; +} + +#ifdef CONFIG_PM +static int pmic8058_kp_suspend(struct device *dev) +{ + struct pmic8058_kp *kp = dev_get_drvdata(dev); + 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) + pmic8058_kp_disable(kp); + + mutex_unlock(&input_dev->mutex); + } + + return 0; +} + +static int pmic8058_kp_resume(struct device *dev) +{ + struct pmic8058_kp *kp = dev_get_drvdata(dev); + 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) + pmic8058_kp_enable(kp); + + mutex_unlock(&input_dev->mutex); + } + + return 0; +} + +static const struct dev_pm_ops pm8058_kp_pm_ops = { + .suspend = pmic8058_kp_suspend, + .resume = pmic8058_kp_resume, +}; +#endif + +static struct platform_driver pmic8058_kp_driver = { + .probe = pmic8058_kp_probe, + .remove = __devexit_p(pmic8058_kp_remove), + .driver = { + .name = "pm8058-keypad", + .owner = THIS_MODULE, +#ifdef CONFIG_PM + .pm = &pm8058_kp_pm_ops, +#endif + }, +}; + +static int __init pmic8058_kp_init(void) +{ + return platform_driver_register(&pmic8058_kp_driver); +} +module_init(pmic8058_kp_init); + +static void __exit pmic8058_kp_exit(void) +{ + platform_driver_unregister(&pmic8058_kp_driver); +} +module_exit(pmic8058_kp_exit); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("PMIC8058 keypad driver"); +MODULE_VERSION("1.0"); +MODULE_ALIAS("platform:pmic8058_keypad"); +MODULE_AUTHOR("Trilok Soni "); diff --git a/include/linux/input/pmic8058-keypad.h b/include/linux/input/pmic8058-keypad.h new file mode 100644 index 0000000..f5acfb9 --- /dev/null +++ b/include/linux/input/pmic8058-keypad.h @@ -0,0 +1,53 @@ +/* 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#ifndef __PMIC8058_KEYPAD_H__ +#define __PMIC8058_KEYPAD_H__ + +#include + +/** + * struct pmic8058_keypad_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 pmic8058_keypad_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 debounce_ms; + unsigned int scan_delay_ms; + unsigned int row_hold_ns; + + bool wakeup; + bool rep; +}; + +#endif /*__PMIC8058_KEYPAD_H__ */ -- 1.7.3.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/