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Input: add support for keyboards on ST SPEAr platform
Signed-off-by: Rajeev Kumar <rajeev-dlh.kumar@st.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Rajeev Kumar
Dmitry Torokhov
parent
c44f242064
commit
bc95df78c4
141
arch/arm/plat-spear/include/plat/keyboard.h
Normal file
141
arch/arm/plat-spear/include/plat/keyboard.h
Normal file
@ -0,0 +1,141 @@
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/*
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* Copyright (C) 2010 ST Microelectronics
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* Rajeev Kumar<rajeev-dlh.kumar@st.com>
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#ifndef __PLAT_KEYBOARD_H
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#define __PLAT_KEYBOARD_H
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#include <linux/bitops.h>
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#include <linux/input.h>
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#include <linux/input/matrix_keypad.h>
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#include <linux/types.h>
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#define DECLARE_KEYMAP(_name) \
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int _name[] = { \
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KEY(0, 0, KEY_ESC), \
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KEY(0, 1, KEY_1), \
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KEY(0, 2, KEY_2), \
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KEY(0, 3, KEY_3), \
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KEY(0, 4, KEY_4), \
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KEY(0, 5, KEY_5), \
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KEY(0, 6, KEY_6), \
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KEY(0, 7, KEY_7), \
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KEY(0, 8, KEY_8), \
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KEY(1, 0, KEY_9), \
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KEY(1, 1, KEY_MINUS), \
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KEY(1, 2, KEY_EQUAL), \
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KEY(1, 3, KEY_BACKSPACE), \
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KEY(1, 4, KEY_TAB), \
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KEY(1, 5, KEY_Q), \
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KEY(1, 6, KEY_W), \
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KEY(1, 7, KEY_E), \
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KEY(1, 8, KEY_R), \
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KEY(2, 0, KEY_T), \
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KEY(2, 1, KEY_Y), \
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KEY(2, 2, KEY_U), \
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KEY(2, 3, KEY_I), \
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KEY(2, 4, KEY_O), \
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KEY(2, 5, KEY_P), \
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KEY(2, 6, KEY_LEFTBRACE), \
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KEY(2, 7, KEY_RIGHTBRACE), \
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KEY(2, 8, KEY_ENTER), \
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KEY(3, 0, KEY_LEFTCTRL), \
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KEY(3, 1, KEY_A), \
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KEY(3, 2, KEY_S), \
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KEY(3, 3, KEY_D), \
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KEY(3, 4, KEY_F), \
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KEY(3, 5, KEY_G), \
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KEY(3, 6, KEY_H), \
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KEY(3, 7, KEY_J), \
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KEY(3, 8, KEY_K), \
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KEY(4, 0, KEY_L), \
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KEY(4, 1, KEY_SEMICOLON), \
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KEY(4, 2, KEY_APOSTROPHE), \
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KEY(4, 3, KEY_GRAVE), \
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KEY(4, 4, KEY_LEFTSHIFT), \
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KEY(4, 5, KEY_BACKSLASH), \
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KEY(4, 6, KEY_Z), \
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KEY(4, 7, KEY_X), \
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KEY(4, 8, KEY_C), \
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KEY(4, 0, KEY_L), \
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KEY(4, 1, KEY_SEMICOLON), \
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KEY(4, 2, KEY_APOSTROPHE), \
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KEY(4, 3, KEY_GRAVE), \
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KEY(4, 4, KEY_LEFTSHIFT), \
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KEY(4, 5, KEY_BACKSLASH), \
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KEY(4, 6, KEY_Z), \
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KEY(4, 7, KEY_X), \
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KEY(4, 8, KEY_C), \
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KEY(4, 0, KEY_L), \
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KEY(4, 1, KEY_SEMICOLON), \
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KEY(4, 2, KEY_APOSTROPHE), \
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KEY(4, 3, KEY_GRAVE), \
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KEY(4, 4, KEY_LEFTSHIFT), \
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KEY(4, 5, KEY_BACKSLASH), \
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KEY(4, 6, KEY_Z), \
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KEY(4, 7, KEY_X), \
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KEY(4, 8, KEY_C), \
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KEY(5, 0, KEY_V), \
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KEY(5, 1, KEY_B), \
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KEY(5, 2, KEY_N), \
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KEY(5, 3, KEY_M), \
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KEY(5, 4, KEY_COMMA), \
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KEY(5, 5, KEY_DOT), \
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KEY(5, 6, KEY_SLASH), \
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KEY(5, 7, KEY_RIGHTSHIFT), \
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KEY(5, 8, KEY_KPASTERISK), \
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KEY(6, 0, KEY_LEFTALT), \
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KEY(6, 1, KEY_SPACE), \
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KEY(6, 2, KEY_CAPSLOCK), \
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KEY(6, 3, KEY_F1), \
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KEY(6, 4, KEY_F2), \
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KEY(6, 5, KEY_F3), \
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KEY(6, 6, KEY_F4), \
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KEY(6, 7, KEY_F5), \
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KEY(6, 8, KEY_F6), \
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KEY(7, 0, KEY_F7), \
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KEY(7, 1, KEY_F8), \
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KEY(7, 2, KEY_F9), \
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KEY(7, 3, KEY_F10), \
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KEY(7, 4, KEY_NUMLOCK), \
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KEY(7, 5, KEY_SCROLLLOCK), \
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KEY(7, 6, KEY_KP7), \
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KEY(7, 7, KEY_KP8), \
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KEY(7, 8, KEY_KP9), \
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KEY(8, 0, KEY_KPMINUS), \
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KEY(8, 1, KEY_KP4), \
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KEY(8, 2, KEY_KP5), \
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KEY(8, 3, KEY_KP6), \
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KEY(8, 4, KEY_KPPLUS), \
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KEY(8, 5, KEY_KP1), \
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KEY(8, 6, KEY_KP2), \
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KEY(8, 7, KEY_KP3), \
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KEY(8, 8, KEY_KP0), \
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}
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/**
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* struct kbd_platform_data - spear keyboard platform data
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* keymap: pointer to keymap data (table and size)
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* rep: enables key autorepeat
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*
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* This structure is supposed to be used by platform code to supply
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* keymaps to drivers that implement keyboards.
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*/
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struct kbd_platform_data {
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const struct matrix_keymap_data *keymap;
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bool rep;
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};
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/* This function is used to set platform data field of pdev->dev */
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static inline void
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kbd_set_plat_data(struct platform_device *pdev, struct kbd_platform_data *data)
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{
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pdev->dev.platform_data = data;
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}
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#endif /* __PLAT_KEYBOARD_H */
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@ -443,6 +443,15 @@ config KEYBOARD_OMAP4
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To compile this driver as a module, choose M here: the
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module will be called omap4-keypad.
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config KEYBOARD_SPEAR
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tristate "ST SPEAR keyboard support"
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depends on PLAT_SPEAR
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help
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Say Y here if you want to use the SPEAR keyboard.
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To compile this driver as a module, choose M here: the
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module will be called spear-keboard.
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config KEYBOARD_TNETV107X
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tristate "TI TNETV107X keypad support"
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depends on ARCH_DAVINCI_TNETV107X
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@ -37,6 +37,7 @@ 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-$(CONFIG_KEYBOARD_SPEAR) += spear-keyboard.o
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obj-$(CONFIG_KEYBOARD_STMPE) += stmpe-keypad.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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344
drivers/input/keyboard/spear-keyboard.c
Normal file
344
drivers/input/keyboard/spear-keyboard.c
Normal file
@ -0,0 +1,344 @@
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/*
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* SPEAr Keyboard Driver
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* Based on omap-keypad driver
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*
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* Copyright (C) 2010 ST Microelectronics
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* Rajeev Kumar<rajeev-dlh.kumar@st.com>
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#include <linux/clk.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/input.h>
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#include <linux/io.h>
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#include <linux/irq.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/pm_wakeup.h>
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#include <linux/slab.h>
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#include <linux/types.h>
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#include <plat/keyboard.h>
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/* Keyboard Registers */
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#define MODE_REG 0x00 /* 16 bit reg */
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#define STATUS_REG 0x0C /* 2 bit reg */
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#define DATA_REG 0x10 /* 8 bit reg */
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#define INTR_MASK 0x54
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/* Register Values */
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/*
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* pclk freq mask = (APB FEQ -1)= 82 MHZ.Programme bit 15-9 in mode
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* control register as 1010010(82MHZ)
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*/
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#define PCLK_FREQ_MSK 0xA400 /* 82 MHz */
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#define START_SCAN 0x0100
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#define SCAN_RATE_10 0x0000
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#define SCAN_RATE_20 0x0004
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#define SCAN_RATE_40 0x0008
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#define SCAN_RATE_80 0x000C
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#define MODE_KEYBOARD 0x0002
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#define DATA_AVAIL 0x2
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#define KEY_MASK 0xFF000000
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#define KEY_VALUE 0x00FFFFFF
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#define ROW_MASK 0xF0
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#define COLUMN_MASK 0x0F
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#define ROW_SHIFT 4
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struct spear_kbd {
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struct input_dev *input;
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struct resource *res;
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void __iomem *io_base;
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struct clk *clk;
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unsigned int irq;
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unsigned short last_key;
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unsigned short keycodes[256];
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};
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static irqreturn_t spear_kbd_interrupt(int irq, void *dev_id)
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{
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struct spear_kbd *kbd = dev_id;
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struct input_dev *input = kbd->input;
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unsigned int key;
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u8 sts, val;
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sts = readb(kbd->io_base + STATUS_REG);
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if (sts & DATA_AVAIL)
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return IRQ_NONE;
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if (kbd->last_key != KEY_RESERVED) {
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input_report_key(input, kbd->last_key, 0);
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kbd->last_key = KEY_RESERVED;
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}
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/* following reads active (row, col) pair */
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val = readb(kbd->io_base + DATA_REG);
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key = kbd->keycodes[val];
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input_event(input, EV_MSC, MSC_SCAN, val);
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input_report_key(input, key, 1);
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input_sync(input);
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kbd->last_key = key;
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/* clear interrupt */
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writeb(0, kbd->io_base + STATUS_REG);
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return IRQ_HANDLED;
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}
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static int spear_kbd_open(struct input_dev *dev)
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{
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struct spear_kbd *kbd = input_get_drvdata(dev);
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int error;
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u16 val;
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kbd->last_key = KEY_RESERVED;
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error = clk_enable(kbd->clk);
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if (error)
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return error;
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/* program keyboard */
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val = SCAN_RATE_80 | MODE_KEYBOARD | PCLK_FREQ_MSK;
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writew(val, kbd->io_base + MODE_REG);
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writeb(1, kbd->io_base + STATUS_REG);
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/* start key scan */
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val = readw(kbd->io_base + MODE_REG);
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val |= START_SCAN;
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writew(val, kbd->io_base + MODE_REG);
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return 0;
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}
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static void spear_kbd_close(struct input_dev *dev)
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{
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struct spear_kbd *kbd = input_get_drvdata(dev);
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u16 val;
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/* stop key scan */
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val = readw(kbd->io_base + MODE_REG);
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val &= ~START_SCAN;
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writew(val, kbd->io_base + MODE_REG);
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clk_disable(kbd->clk);
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kbd->last_key = KEY_RESERVED;
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}
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static int __devinit spear_kbd_probe(struct platform_device *pdev)
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{
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const struct kbd_platform_data *pdata = pdev->dev.platform_data;
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const struct matrix_keymap_data *keymap;
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struct spear_kbd *kbd;
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struct input_dev *input_dev;
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struct resource *res;
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int irq;
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int error;
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if (!pdata) {
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dev_err(&pdev->dev, "Invalid platform data\n");
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return -EINVAL;
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}
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keymap = pdata->keymap;
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if (!keymap) {
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dev_err(&pdev->dev, "no keymap defined\n");
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return -EINVAL;
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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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dev_err(&pdev->dev, "no keyboard resource defined\n");
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return -EBUSY;
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}
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irq = platform_get_irq(pdev, 0);
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if (irq < 0) {
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dev_err(&pdev->dev, "not able to get irq for the device\n");
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return irq;
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}
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kbd = kzalloc(sizeof(*kbd), GFP_KERNEL);
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input_dev = input_allocate_device();
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if (!kbd || !input_dev) {
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dev_err(&pdev->dev, "out of memory\n");
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error = -ENOMEM;
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goto err_free_mem;
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}
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kbd->input = input_dev;
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kbd->irq = irq;
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kbd->res = request_mem_region(res->start, resource_size(res),
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pdev->name);
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if (!kbd->res) {
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dev_err(&pdev->dev, "keyboard region already claimed\n");
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error = -EBUSY;
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goto err_free_mem;
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}
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kbd->io_base = ioremap(res->start, resource_size(res));
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if (!kbd->io_base) {
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dev_err(&pdev->dev, "ioremap failed for kbd_region\n");
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error = -ENOMEM;
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goto err_release_mem_region;
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}
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kbd->clk = clk_get(&pdev->dev, NULL);
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if (IS_ERR(kbd->clk)) {
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error = PTR_ERR(kbd->clk);
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goto err_iounmap;
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}
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input_dev->name = "Spear Keyboard";
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input_dev->phys = "keyboard/input0";
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input_dev->dev.parent = &pdev->dev;
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input_dev->id.bustype = BUS_HOST;
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input_dev->id.vendor = 0x0001;
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input_dev->id.product = 0x0001;
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input_dev->id.version = 0x0100;
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input_dev->open = spear_kbd_open;
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input_dev->close = spear_kbd_close;
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__set_bit(EV_KEY, input_dev->evbit);
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if (pdata->rep)
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__set_bit(EV_REP, input_dev->evbit);
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input_set_capability(input_dev, EV_MSC, MSC_SCAN);
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input_dev->keycode = kbd->keycodes;
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input_dev->keycodesize = sizeof(kbd->keycodes[0]);
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input_dev->keycodemax = ARRAY_SIZE(kbd->keycodes);
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matrix_keypad_build_keymap(keymap, ROW_SHIFT,
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input_dev->keycode, input_dev->keybit);
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input_set_drvdata(input_dev, kbd);
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error = request_irq(irq, spear_kbd_interrupt, 0, "keyboard", kbd);
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if (error) {
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dev_err(&pdev->dev, "request_irq fail\n");
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goto err_put_clk;
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}
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error = input_register_device(input_dev);
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if (error) {
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dev_err(&pdev->dev, "Unable to register keyboard device\n");
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goto err_free_irq;
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}
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device_init_wakeup(&pdev->dev, 1);
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platform_set_drvdata(pdev, kbd);
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return 0;
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err_free_irq:
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free_irq(kbd->irq, kbd);
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err_put_clk:
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clk_put(kbd->clk);
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err_iounmap:
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iounmap(kbd->io_base);
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err_release_mem_region:
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release_mem_region(res->start, resource_size(res));
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err_free_mem:
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input_free_device(input_dev);
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kfree(kbd);
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return error;
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}
|
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static int __devexit spear_kbd_remove(struct platform_device *pdev)
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{
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struct spear_kbd *kbd = platform_get_drvdata(pdev);
|
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free_irq(kbd->irq, kbd);
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input_unregister_device(kbd->input);
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clk_put(kbd->clk);
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iounmap(kbd->io_base);
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release_mem_region(kbd->res->start, resource_size(kbd->res));
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kfree(kbd);
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device_init_wakeup(&pdev->dev, 1);
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platform_set_drvdata(pdev, NULL);
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return 0;
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}
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#ifdef CONFIG_PM
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static int spear_kbd_suspend(struct device *dev)
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{
|
||||
struct platform_device *pdev = to_platform_device(dev);
|
||||
struct spear_kbd *kbd = platform_get_drvdata(pdev);
|
||||
struct input_dev *input_dev = kbd->input;
|
||||
|
||||
mutex_lock(&input_dev->mutex);
|
||||
|
||||
if (input_dev->users)
|
||||
clk_enable(kbd->clk);
|
||||
|
||||
if (device_may_wakeup(&pdev->dev))
|
||||
enable_irq_wake(kbd->irq);
|
||||
|
||||
mutex_unlock(&input_dev->mutex);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int spear_kbd_resume(struct device *dev)
|
||||
{
|
||||
struct platform_device *pdev = to_platform_device(dev);
|
||||
struct spear_kbd *kbd = platform_get_drvdata(pdev);
|
||||
struct input_dev *input_dev = kbd->input;
|
||||
|
||||
mutex_lock(&input_dev->mutex);
|
||||
|
||||
if (device_may_wakeup(&pdev->dev))
|
||||
disable_irq_wake(kbd->irq);
|
||||
|
||||
if (input_dev->users)
|
||||
clk_enable(kbd->clk);
|
||||
|
||||
mutex_unlock(&input_dev->mutex);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct dev_pm_ops spear_kbd_pm_ops = {
|
||||
.suspend = spear_kbd_suspend,
|
||||
.resume = spear_kbd_resume,
|
||||
};
|
||||
#endif
|
||||
|
||||
static struct platform_driver spear_kbd_driver = {
|
||||
.probe = spear_kbd_probe,
|
||||
.remove = __devexit_p(spear_kbd_remove),
|
||||
.driver = {
|
||||
.name = "keyboard",
|
||||
.owner = THIS_MODULE,
|
||||
#ifdef CONFIG_PM
|
||||
.pm = &spear_kbd_pm_ops,
|
||||
#endif
|
||||
},
|
||||
};
|
||||
|
||||
static int __init spear_kbd_init(void)
|
||||
{
|
||||
return platform_driver_register(&spear_kbd_driver);
|
||||
}
|
||||
module_init(spear_kbd_init);
|
||||
|
||||
static void __exit spear_kbd_exit(void)
|
||||
{
|
||||
platform_driver_unregister(&spear_kbd_driver);
|
||||
}
|
||||
module_exit(spear_kbd_exit);
|
||||
|
||||
MODULE_AUTHOR("Rajeev Kumar");
|
||||
MODULE_DESCRIPTION("SPEAr Keyboard Driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
x
Reference in New Issue
Block a user