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Input: samsung-keypad - Add samsung keypad driver
This patch adds support for keypad driver running on Samsung cpus. This driver is tested on GONI and Aquila board using S5PC110 cpu. [ch.naveen@samsung.com: tested on SMDK6410, SMDKC100, and SMDKV210] Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Tested-by: Naveen Krishna Ch <ch.naveen@samsung.com> Acked-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Joonyoung Shim
Dmitry Torokhov
parent
1ca56e513a
commit
0fffed27f9
43
arch/arm/plat-samsung/include/plat/keypad.h
Normal file
43
arch/arm/plat-samsung/include/plat/keypad.h
Normal file
@ -0,0 +1,43 @@
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/*
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* Samsung Platform - Keypad platform data definitions
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*
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* Copyright (C) 2010 Samsung Electronics Co.Ltd
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* Author: Joonyoung Shim <jy0922.shim@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#ifndef __PLAT_SAMSUNG_KEYPAD_H
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#define __PLAT_SAMSUNG_KEYPAD_H
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#include <linux/input/matrix_keypad.h>
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#define SAMSUNG_MAX_ROWS 8
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#define SAMSUNG_MAX_COLS 8
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/**
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* struct samsung_keypad_platdata - Platform device data for Samsung Keypad.
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* @keymap_data: pointer to &matrix_keymap_data.
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* @rows: number of keypad row supported.
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* @cols: number of keypad col supported.
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* @no_autorepeat: disable key autorepeat.
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* @wakeup: controls whether the device should be set up as wakeup source.
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* @cfg_gpio: configure the GPIO.
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*
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* Initialisation data specific to either the machine or the platform
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* for the device driver to use or call-back when configuring gpio.
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*/
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struct samsung_keypad_platdata {
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const struct matrix_keymap_data *keymap_data;
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unsigned int rows;
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unsigned int cols;
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bool no_autorepeat;
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bool wakeup;
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void (*cfg_gpio)(unsigned int rows, unsigned int cols);
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};
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#endif /* __PLAT_SAMSUNG_KEYPAD_H */
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@ -354,6 +354,15 @@ 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_SAMSUNG
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tristate "Samsung keypad support"
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depends on SAMSUNG_DEV_KEYPAD
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help
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Say Y here if you want to use the Samsung keypad.
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To compile this driver as a module, choose M here: the
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module will be called samsung-keypad.
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config KEYBOARD_STOWAWAY
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tristate "Stowaway keyboard"
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select SERIO
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@ -33,6 +33,7 @@ obj-$(CONFIG_KEYBOARD_OPENCORES) += opencores-kbd.o
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obj-$(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_QT2160) += qt2160.o
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obj-$(CONFIG_KEYBOARD_SAMSUNG) += samsung-keypad.o
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obj-$(CONFIG_KEYBOARD_SH_KEYSC) += sh_keysc.o
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obj-$(CONFIG_KEYBOARD_STOWAWAY) += stowaway.o
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obj-$(CONFIG_KEYBOARD_SUNKBD) += sunkbd.o
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491
drivers/input/keyboard/samsung-keypad.c
Normal file
491
drivers/input/keyboard/samsung-keypad.c
Normal file
@ -0,0 +1,491 @@
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/*
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* Samsung keypad driver
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*
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* Copyright (C) 2010 Samsung Electronics Co.Ltd
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* Author: Joonyoung Shim <jy0922.shim@samsung.com>
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* Author: Donghwa Lee <dh09.lee@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/clk.h>
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/input.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/sched.h>
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#include <plat/keypad.h>
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#define SAMSUNG_KEYIFCON 0x00
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#define SAMSUNG_KEYIFSTSCLR 0x04
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#define SAMSUNG_KEYIFCOL 0x08
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#define SAMSUNG_KEYIFROW 0x0c
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#define SAMSUNG_KEYIFFC 0x10
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/* SAMSUNG_KEYIFCON */
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#define SAMSUNG_KEYIFCON_INT_F_EN (1 << 0)
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#define SAMSUNG_KEYIFCON_INT_R_EN (1 << 1)
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#define SAMSUNG_KEYIFCON_DF_EN (1 << 2)
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#define SAMSUNG_KEYIFCON_FC_EN (1 << 3)
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#define SAMSUNG_KEYIFCON_WAKEUPEN (1 << 4)
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/* SAMSUNG_KEYIFSTSCLR */
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#define SAMSUNG_KEYIFSTSCLR_P_INT_MASK (0xff << 0)
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#define SAMSUNG_KEYIFSTSCLR_R_INT_MASK (0xff << 8)
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#define SAMSUNG_KEYIFSTSCLR_R_INT_OFFSET 8
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#define S5PV210_KEYIFSTSCLR_P_INT_MASK (0x3fff << 0)
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#define S5PV210_KEYIFSTSCLR_R_INT_MASK (0x3fff << 16)
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#define S5PV210_KEYIFSTSCLR_R_INT_OFFSET 16
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/* SAMSUNG_KEYIFCOL */
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#define SAMSUNG_KEYIFCOL_MASK (0xff << 0)
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#define S5PV210_KEYIFCOLEN_MASK (0xff << 8)
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/* SAMSUNG_KEYIFROW */
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#define SAMSUNG_KEYIFROW_MASK (0xff << 0)
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#define S5PV210_KEYIFROW_MASK (0x3fff << 0)
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/* SAMSUNG_KEYIFFC */
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#define SAMSUNG_KEYIFFC_MASK (0x3ff << 0)
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enum samsung_keypad_type {
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KEYPAD_TYPE_SAMSUNG,
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KEYPAD_TYPE_S5PV210,
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};
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struct samsung_keypad {
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struct input_dev *input_dev;
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struct clk *clk;
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void __iomem *base;
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wait_queue_head_t wait;
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bool stopped;
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int irq;
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unsigned int row_shift;
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unsigned int rows;
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unsigned int cols;
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unsigned int row_state[SAMSUNG_MAX_COLS];
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unsigned short keycodes[];
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};
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static int samsung_keypad_is_s5pv210(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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enum samsung_keypad_type type =
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platform_get_device_id(pdev)->driver_data;
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return type == KEYPAD_TYPE_S5PV210;
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}
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static void samsung_keypad_scan(struct samsung_keypad *keypad,
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unsigned int *row_state)
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{
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struct device *dev = keypad->input_dev->dev.parent;
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unsigned int col;
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unsigned int val;
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for (col = 0; col < keypad->cols; col++) {
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if (samsung_keypad_is_s5pv210(dev)) {
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val = S5PV210_KEYIFCOLEN_MASK;
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val &= ~(1 << col) << 8;
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} else {
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val = SAMSUNG_KEYIFCOL_MASK;
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val &= ~(1 << col);
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}
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writel(val, keypad->base + SAMSUNG_KEYIFCOL);
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mdelay(1);
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val = readl(keypad->base + SAMSUNG_KEYIFROW);
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row_state[col] = ~val & ((1 << keypad->rows) - 1);
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}
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/* KEYIFCOL reg clear */
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writel(0, keypad->base + SAMSUNG_KEYIFCOL);
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}
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static bool samsung_keypad_report(struct samsung_keypad *keypad,
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unsigned int *row_state)
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{
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struct input_dev *input_dev = keypad->input_dev;
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unsigned int changed;
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unsigned int pressed;
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unsigned int key_down = 0;
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unsigned int val;
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unsigned int col, row;
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for (col = 0; col < keypad->cols; col++) {
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changed = row_state[col] ^ keypad->row_state[col];
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key_down |= row_state[col];
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if (!changed)
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continue;
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for (row = 0; row < keypad->rows; row++) {
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if (!(changed & (1 << row)))
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continue;
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pressed = row_state[col] & (1 << row);
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dev_dbg(&keypad->input_dev->dev,
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"key %s, row: %d, col: %d\n",
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pressed ? "pressed" : "released", row, col);
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val = MATRIX_SCAN_CODE(row, col, keypad->row_shift);
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input_event(input_dev, EV_MSC, MSC_SCAN, val);
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input_report_key(input_dev,
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keypad->keycodes[val], pressed);
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}
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input_sync(keypad->input_dev);
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}
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memcpy(keypad->row_state, row_state, sizeof(keypad->row_state));
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return key_down;
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}
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static irqreturn_t samsung_keypad_irq(int irq, void *dev_id)
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{
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struct samsung_keypad *keypad = dev_id;
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unsigned int row_state[SAMSUNG_MAX_COLS];
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unsigned int val;
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bool key_down;
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do {
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val = readl(keypad->base + SAMSUNG_KEYIFSTSCLR);
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/* Clear interrupt. */
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writel(~0x0, keypad->base + SAMSUNG_KEYIFSTSCLR);
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samsung_keypad_scan(keypad, row_state);
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key_down = samsung_keypad_report(keypad, row_state);
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if (key_down)
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wait_event_timeout(keypad->wait, keypad->stopped,
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msecs_to_jiffies(50));
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} while (key_down && !keypad->stopped);
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return IRQ_HANDLED;
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}
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static void samsung_keypad_start(struct samsung_keypad *keypad)
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{
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unsigned int val;
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/* Tell IRQ thread that it may poll the device. */
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keypad->stopped = false;
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clk_enable(keypad->clk);
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/* Enable interrupt bits. */
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val = readl(keypad->base + SAMSUNG_KEYIFCON);
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val |= SAMSUNG_KEYIFCON_INT_F_EN | SAMSUNG_KEYIFCON_INT_R_EN;
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writel(val, keypad->base + SAMSUNG_KEYIFCON);
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/* KEYIFCOL reg clear. */
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writel(0, keypad->base + SAMSUNG_KEYIFCOL);
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}
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static void samsung_keypad_stop(struct samsung_keypad *keypad)
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{
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unsigned int val;
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/* Signal IRQ thread to stop polling and disable the handler. */
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keypad->stopped = true;
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wake_up(&keypad->wait);
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disable_irq(keypad->irq);
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/* Clear interrupt. */
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writel(~0x0, keypad->base + SAMSUNG_KEYIFSTSCLR);
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/* Disable interrupt bits. */
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val = readl(keypad->base + SAMSUNG_KEYIFCON);
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val &= ~(SAMSUNG_KEYIFCON_INT_F_EN | SAMSUNG_KEYIFCON_INT_R_EN);
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writel(val, keypad->base + SAMSUNG_KEYIFCON);
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clk_disable(keypad->clk);
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/*
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* Now that chip should not generate interrupts we can safely
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* re-enable the handler.
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*/
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enable_irq(keypad->irq);
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}
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static int samsung_keypad_open(struct input_dev *input_dev)
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{
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struct samsung_keypad *keypad = input_get_drvdata(input_dev);
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samsung_keypad_start(keypad);
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return 0;
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}
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static void samsung_keypad_close(struct input_dev *input_dev)
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{
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struct samsung_keypad *keypad = input_get_drvdata(input_dev);
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samsung_keypad_stop(keypad);
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}
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static int __devinit samsung_keypad_probe(struct platform_device *pdev)
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{
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const struct samsung_keypad_platdata *pdata;
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const struct matrix_keymap_data *keymap_data;
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struct samsung_keypad *keypad;
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struct resource *res;
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struct input_dev *input_dev;
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unsigned int row_shift;
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unsigned int keymap_size;
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int error;
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pdata = pdev->dev.platform_data;
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if (!pdata) {
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dev_err(&pdev->dev, "no platform data defined\n");
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return -EINVAL;
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}
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keymap_data = pdata->keymap_data;
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if (!keymap_data) {
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dev_err(&pdev->dev, "no keymap data defined\n");
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return -EINVAL;
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}
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if (!pdata->rows || pdata->rows > SAMSUNG_MAX_ROWS)
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return -EINVAL;
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if (!pdata->cols || pdata->cols > SAMSUNG_MAX_COLS)
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return -EINVAL;
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/* initialize the gpio */
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if (pdata->cfg_gpio)
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pdata->cfg_gpio(pdata->rows, pdata->cols);
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row_shift = get_count_order(pdata->cols);
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keymap_size = (pdata->rows << row_shift) * sizeof(keypad->keycodes[0]);
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keypad = kzalloc(sizeof(*keypad) + keymap_size, GFP_KERNEL);
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input_dev = input_allocate_device();
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if (!keypad || !input_dev) {
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error = -ENOMEM;
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goto err_free_mem;
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}
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res) {
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error = -ENODEV;
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goto err_free_mem;
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}
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keypad->base = ioremap(res->start, resource_size(res));
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if (!keypad->base) {
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error = -EBUSY;
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goto err_free_mem;
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}
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keypad->clk = clk_get(&pdev->dev, "keypad");
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if (IS_ERR(keypad->clk)) {
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dev_err(&pdev->dev, "failed to get keypad clk\n");
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error = PTR_ERR(keypad->clk);
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goto err_unmap_base;
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}
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keypad->input_dev = input_dev;
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keypad->row_shift = row_shift;
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keypad->rows = pdata->rows;
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keypad->cols = pdata->cols;
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init_waitqueue_head(&keypad->wait);
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input_dev->name = pdev->name;
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input_dev->id.bustype = BUS_HOST;
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input_dev->dev.parent = &pdev->dev;
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input_set_drvdata(input_dev, keypad);
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input_dev->open = samsung_keypad_open;
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input_dev->close = samsung_keypad_close;
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input_dev->evbit[0] = BIT_MASK(EV_KEY);
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if (!pdata->no_autorepeat)
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input_dev->evbit[0] |= BIT_MASK(EV_REP);
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input_set_capability(input_dev, EV_MSC, MSC_SCAN);
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input_dev->keycode = keypad->keycodes;
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input_dev->keycodesize = sizeof(keypad->keycodes[0]);
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input_dev->keycodemax = pdata->rows << row_shift;
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matrix_keypad_build_keymap(keymap_data, row_shift,
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input_dev->keycode, input_dev->keybit);
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keypad->irq = platform_get_irq(pdev, 0);
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if (keypad->irq < 0) {
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error = keypad->irq;
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goto err_put_clk;
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}
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error = request_threaded_irq(keypad->irq, NULL, samsung_keypad_irq,
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IRQF_ONESHOT, dev_name(&pdev->dev), keypad);
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if (error) {
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dev_err(&pdev->dev, "failed to register keypad interrupt\n");
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goto err_put_clk;
|
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}
|
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|
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error = input_register_device(keypad->input_dev);
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if (error)
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goto err_free_irq;
|
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|
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device_init_wakeup(&pdev->dev, pdata->wakeup);
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platform_set_drvdata(pdev, keypad);
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return 0;
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err_free_irq:
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free_irq(keypad->irq, keypad);
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err_put_clk:
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clk_put(keypad->clk);
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err_unmap_base:
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iounmap(keypad->base);
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err_free_mem:
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input_free_device(input_dev);
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kfree(keypad);
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|
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return error;
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}
|
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|
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static int __devexit samsung_keypad_remove(struct platform_device *pdev)
|
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{
|
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struct samsung_keypad *keypad = platform_get_drvdata(pdev);
|
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|
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device_init_wakeup(&pdev->dev, 0);
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platform_set_drvdata(pdev, NULL);
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input_unregister_device(keypad->input_dev);
|
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/*
|
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* It is safe to free IRQ after unregistering device because
|
||||
* samsung_keypad_close will shut off interrupts.
|
||||
*/
|
||||
free_irq(keypad->irq, keypad);
|
||||
|
||||
clk_put(keypad->clk);
|
||||
|
||||
iounmap(keypad->base);
|
||||
kfree(keypad);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM
|
||||
static void samsung_keypad_toggle_wakeup(struct samsung_keypad *keypad,
|
||||
bool enable)
|
||||
{
|
||||
struct device *dev = keypad->input_dev->dev.parent;
|
||||
unsigned int val;
|
||||
|
||||
clk_enable(keypad->clk);
|
||||
|
||||
val = readl(keypad->base + SAMSUNG_KEYIFCON);
|
||||
if (enable) {
|
||||
val |= SAMSUNG_KEYIFCON_WAKEUPEN;
|
||||
if (device_may_wakeup(dev))
|
||||
enable_irq_wake(keypad->irq);
|
||||
} else {
|
||||
val &= ~SAMSUNG_KEYIFCON_WAKEUPEN;
|
||||
if (device_may_wakeup(dev))
|
||||
disable_irq_wake(keypad->irq);
|
||||
}
|
||||
writel(val, keypad->base + SAMSUNG_KEYIFCON);
|
||||
|
||||
clk_disable(keypad->clk);
|
||||
}
|
||||
|
||||
static int samsung_keypad_suspend(struct device *dev)
|
||||
{
|
||||
struct platform_device *pdev = to_platform_device(dev);
|
||||
struct samsung_keypad *keypad = platform_get_drvdata(pdev);
|
||||
struct input_dev *input_dev = keypad->input_dev;
|
||||
|
||||
mutex_lock(&input_dev->mutex);
|
||||
|
||||
if (input_dev->users)
|
||||
samsung_keypad_stop(keypad);
|
||||
|
||||
samsung_keypad_toggle_wakeup(keypad, true);
|
||||
|
||||
mutex_unlock(&input_dev->mutex);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int samsung_keypad_resume(struct device *dev)
|
||||
{
|
||||
struct platform_device *pdev = to_platform_device(dev);
|
||||
struct samsung_keypad *keypad = platform_get_drvdata(pdev);
|
||||
struct input_dev *input_dev = keypad->input_dev;
|
||||
|
||||
mutex_lock(&input_dev->mutex);
|
||||
|
||||
samsung_keypad_toggle_wakeup(keypad, false);
|
||||
|
||||
if (input_dev->users)
|
||||
samsung_keypad_start(keypad);
|
||||
|
||||
mutex_unlock(&input_dev->mutex);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct dev_pm_ops samsung_keypad_pm_ops = {
|
||||
.suspend = samsung_keypad_suspend,
|
||||
.resume = samsung_keypad_resume,
|
||||
};
|
||||
#endif
|
||||
|
||||
static struct platform_device_id samsung_keypad_driver_ids[] = {
|
||||
{
|
||||
.name = "samsung-keypad",
|
||||
.driver_data = KEYPAD_TYPE_SAMSUNG,
|
||||
}, {
|
||||
.name = "s5pv210-keypad",
|
||||
.driver_data = KEYPAD_TYPE_S5PV210,
|
||||
},
|
||||
{ },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(platform, samsung_keypad_driver_ids);
|
||||
|
||||
static struct platform_driver samsung_keypad_driver = {
|
||||
.probe = samsung_keypad_probe,
|
||||
.remove = __devexit_p(samsung_keypad_remove),
|
||||
.driver = {
|
||||
.name = "samsung-keypad",
|
||||
.owner = THIS_MODULE,
|
||||
#ifdef CONFIG_PM
|
||||
.pm = &samsung_keypad_pm_ops,
|
||||
#endif
|
||||
},
|
||||
.id_table = samsung_keypad_driver_ids,
|
||||
};
|
||||
|
||||
static int __init samsung_keypad_init(void)
|
||||
{
|
||||
return platform_driver_register(&samsung_keypad_driver);
|
||||
}
|
||||
module_init(samsung_keypad_init);
|
||||
|
||||
static void __exit samsung_keypad_exit(void)
|
||||
{
|
||||
platform_driver_unregister(&samsung_keypad_driver);
|
||||
}
|
||||
module_exit(samsung_keypad_exit);
|
||||
|
||||
MODULE_DESCRIPTION("Samsung keypad driver");
|
||||
MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
|
||||
MODULE_AUTHOR("Donghwa Lee <dh09.lee@samsung.com>");
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_ALIAS("platform:samsung-keypad");
|
||||
Loading…
Reference in New Issue
Block a user