[PATCH] OMAP: Add keypad driver
This patch adds support for keypad driver running on different TI OMAP(http://www.ti.com/omap) processor based boards like OSK, H2, H3, H4, Persuas and Nokia 770. Signed-off-by: Komal Shah <komal_shah802003@yahoo.com> Acked-by: Dmitry Torokhov <dtor@mail.ru> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Komal Shah
Linus Torvalds
parent
7768a13c25
commit
ad4e09b16a
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@ -183,4 +183,13 @@ config KEYBOARD_HIL
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This driver implements support for HIL-keyboards attached
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to your machine, so normally you should say Y here.
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config KEYBOARD_OMAP
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tristate "TI OMAP keypad support"
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depends on (ARCH_OMAP1 || ARCH_OMAP2)
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help
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Say Y here if you want to use the OMAP keypad.
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To compile this driver as a module, choose M here: the
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module will be called omap-keypad.
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endif
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@ -15,4 +15,5 @@ obj-$(CONFIG_KEYBOARD_CORGI) += corgikbd.o
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obj-$(CONFIG_KEYBOARD_SPITZ) += spitzkbd.o
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obj-$(CONFIG_KEYBOARD_HIL) += hil_kbd.o
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obj-$(CONFIG_KEYBOARD_HIL_OLD) += hilkbd.o
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obj-$(CONFIG_KEYBOARD_OMAP) += omap-keypad.o
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@ -0,0 +1,492 @@
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/*
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* linux/drivers/input/keyboard/omap-keypad.c
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*
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* OMAP Keypad Driver
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*
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* Copyright (C) 2003 Nokia Corporation
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* Written by Timo Teräs <ext-timo.teras@nokia.com>
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*
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* Added support for H2 & H3 Keypad
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* Copyright (C) 2004 Texas Instruments
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/types.h>
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#include <linux/input.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/platform_device.h>
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#include <linux/mutex.h>
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#include <linux/errno.h>
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#include <asm/arch/gpio.h>
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#include <asm/arch/keypad.h>
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#include <asm/arch/menelaus.h>
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#include <asm/irq.h>
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#include <asm/hardware.h>
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#include <asm/io.h>
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#include <asm/mach-types.h>
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#include <asm/arch/mux.h>
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#undef NEW_BOARD_LEARNING_MODE
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static void omap_kp_tasklet(unsigned long);
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static void omap_kp_timer(unsigned long);
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static unsigned char keypad_state[8];
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static DEFINE_MUTEX(kp_enable_mutex);
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static int kp_enable = 1;
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static int kp_cur_group = -1;
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struct omap_kp {
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struct input_dev *input;
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struct timer_list timer;
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int irq;
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unsigned int rows;
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unsigned int cols;
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unsigned long delay;
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unsigned int debounce;
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};
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DECLARE_TASKLET_DISABLED(kp_tasklet, omap_kp_tasklet, 0);
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static int *keymap;
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static unsigned int *row_gpios;
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static unsigned int *col_gpios;
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#ifdef CONFIG_ARCH_OMAP2
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static void set_col_gpio_val(struct omap_kp *omap_kp, u8 value)
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{
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int col;
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for (col = 0; col < omap_kp->cols; col++) {
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if (value & (1 << col))
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omap_set_gpio_dataout(col_gpios[col], 1);
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else
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omap_set_gpio_dataout(col_gpios[col], 0);
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}
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}
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static u8 get_row_gpio_val(struct omap_kp *omap_kp)
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{
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int row;
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u8 value = 0;
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for (row = 0; row < omap_kp->rows; row++) {
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if (omap_get_gpio_datain(row_gpios[row]))
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value |= (1 << row);
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}
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return value;
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}
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#else
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#define set_col_gpio_val(x, y) do {} while (0)
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#define get_row_gpio_val(x) 0
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#endif
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static irqreturn_t omap_kp_interrupt(int irq, void *dev_id,
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struct pt_regs *regs)
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{
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struct omap_kp *omap_kp = dev_id;
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/* disable keyboard interrupt and schedule for handling */
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if (cpu_is_omap24xx()) {
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int i;
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for (i = 0; i < omap_kp->rows; i++)
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disable_irq(OMAP_GPIO_IRQ(row_gpios[i]));
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} else
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/* disable keyboard interrupt and schedule for handling */
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omap_writew(1, OMAP_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
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tasklet_schedule(&kp_tasklet);
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return IRQ_HANDLED;
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}
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static void omap_kp_timer(unsigned long data)
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{
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tasklet_schedule(&kp_tasklet);
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}
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static void omap_kp_scan_keypad(struct omap_kp *omap_kp, unsigned char *state)
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{
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int col = 0;
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/* read the keypad status */
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if (cpu_is_omap24xx()) {
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int i;
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for (i = 0; i < omap_kp->rows; i++)
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disable_irq(OMAP_GPIO_IRQ(row_gpios[i]));
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/* read the keypad status */
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for (col = 0; col < omap_kp->cols; col++) {
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set_col_gpio_val(omap_kp, ~(1 << col));
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state[col] = ~(get_row_gpio_val(omap_kp)) & 0x3f;
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}
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set_col_gpio_val(omap_kp, 0);
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} else {
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/* disable keyboard interrupt and schedule for handling */
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omap_writew(1, OMAP_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
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/* read the keypad status */
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omap_writew(0xff, OMAP_MPUIO_BASE + OMAP_MPUIO_KBC);
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for (col = 0; col < omap_kp->cols; col++) {
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omap_writew(~(1 << col) & 0xff,
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OMAP_MPUIO_BASE + OMAP_MPUIO_KBC);
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udelay(omap_kp->delay);
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state[col] = ~omap_readw(OMAP_MPUIO_BASE +
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OMAP_MPUIO_KBR_LATCH) & 0xff;
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}
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omap_writew(0x00, OMAP_MPUIO_BASE + OMAP_MPUIO_KBC);
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udelay(2);
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}
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}
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static inline int omap_kp_find_key(int col, int row)
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{
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int i, key;
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key = KEY(col, row, 0);
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for (i = 0; keymap[i] != 0; i++)
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if ((keymap[i] & 0xff000000) == key)
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return keymap[i] & 0x00ffffff;
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return -1;
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}
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static void omap_kp_tasklet(unsigned long data)
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{
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struct omap_kp *omap_kp_data = (struct omap_kp *) data;
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unsigned char new_state[8], changed, key_down = 0;
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int col, row;
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int spurious = 0;
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/* check for any changes */
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omap_kp_scan_keypad(omap_kp_data, new_state);
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/* check for changes and print those */
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for (col = 0; col < omap_kp_data->cols; col++) {
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changed = new_state[col] ^ keypad_state[col];
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key_down |= new_state[col];
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if (changed == 0)
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continue;
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for (row = 0; row < omap_kp_data->rows; row++) {
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int key;
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if (!(changed & (1 << row)))
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continue;
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#ifdef NEW_BOARD_LEARNING_MODE
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printk(KERN_INFO "omap-keypad: key %d-%d %s\n", col,
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row, (new_state[col] & (1 << row)) ?
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"pressed" : "released");
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#else
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key = omap_kp_find_key(col, row);
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if (key < 0) {
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printk(KERN_WARNING
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"omap-keypad: Spurious key event %d-%d\n",
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col, row);
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/* We scan again after a couple of seconds */
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spurious = 1;
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continue;
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}
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if (!(kp_cur_group == (key & GROUP_MASK) ||
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kp_cur_group == -1))
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continue;
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kp_cur_group = key & GROUP_MASK;
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input_report_key(omap_kp_data->input, key & ~GROUP_MASK,
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new_state[col] & (1 << row));
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#endif
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}
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}
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memcpy(keypad_state, new_state, sizeof(keypad_state));
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if (key_down) {
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int delay = HZ / 20;
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/* some key is pressed - keep irq disabled and use timer
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* to poll the keypad */
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if (spurious)
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delay = 2 * HZ;
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mod_timer(&omap_kp_data->timer, jiffies + delay);
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} else {
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/* enable interrupts */
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if (cpu_is_omap24xx()) {
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int i;
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for (i = 0; i < omap_kp_data->rows; i++)
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enable_irq(OMAP_GPIO_IRQ(row_gpios[i]));
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} else {
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omap_writew(0, OMAP_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
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kp_cur_group = -1;
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}
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}
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}
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static ssize_t omap_kp_enable_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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return sprintf(buf, "%u\n", kp_enable);
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}
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static ssize_t omap_kp_enable_store(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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int state;
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if (sscanf(buf, "%u", &state) != 1)
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return -EINVAL;
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if ((state != 1) && (state != 0))
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return -EINVAL;
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mutex_lock(&kp_enable_mutex);
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if (state != kp_enable) {
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if (state)
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enable_irq(INT_KEYBOARD);
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else
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disable_irq(INT_KEYBOARD);
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kp_enable = state;
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}
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mutex_unlock(&kp_enable_mutex);
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return strnlen(buf, count);
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}
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static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, omap_kp_enable_show, omap_kp_enable_store);
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#ifdef CONFIG_PM
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static int omap_kp_suspend(struct platform_device *dev, pm_message_t state)
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{
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/* Nothing yet */
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return 0;
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}
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static int omap_kp_resume(struct platform_device *dev)
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{
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/* Nothing yet */
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return 0;
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}
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#else
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#define omap_kp_suspend NULL
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#define omap_kp_resume NULL
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#endif
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static int __init omap_kp_probe(struct platform_device *pdev)
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{
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struct omap_kp *omap_kp;
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struct input_dev *input_dev;
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struct omap_kp_platform_data *pdata = pdev->dev.platform_data;
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int i, col_idx, row_idx, irq_idx, ret;
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if (!pdata->rows || !pdata->cols || !pdata->keymap) {
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printk(KERN_ERR "No rows, cols or keymap from pdata\n");
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return -EINVAL;
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}
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omap_kp = kzalloc(sizeof(struct omap_kp), GFP_KERNEL);
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input_dev = input_allocate_device();
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if (!omap_kp || !input_dev) {
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kfree(omap_kp);
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input_free_device(input_dev);
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return -ENOMEM;
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}
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platform_set_drvdata(pdev, omap_kp);
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omap_kp->input = input_dev;
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/* Disable the interrupt for the MPUIO keyboard */
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if (!cpu_is_omap24xx())
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omap_writew(1, OMAP_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
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keymap = pdata->keymap;
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if (pdata->rep)
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set_bit(EV_REP, input_dev->evbit);
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if (pdata->delay)
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omap_kp->delay = pdata->delay;
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if (pdata->row_gpios && pdata->col_gpios) {
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row_gpios = pdata->row_gpios;
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col_gpios = pdata->col_gpios;
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}
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omap_kp->rows = pdata->rows;
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omap_kp->cols = pdata->cols;
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if (cpu_is_omap24xx()) {
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/* Cols: outputs */
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for (col_idx = 0; col_idx < omap_kp->cols; col_idx++) {
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if (omap_request_gpio(col_gpios[col_idx]) < 0) {
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printk(KERN_ERR "Failed to request"
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"GPIO%d for keypad\n",
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col_gpios[col_idx]);
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goto err1;
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}
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omap_set_gpio_direction(col_gpios[col_idx], 0);
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}
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/* Rows: inputs */
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for (row_idx = 0; row_idx < omap_kp->rows; row_idx++) {
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if (omap_request_gpio(row_gpios[row_idx]) < 0) {
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printk(KERN_ERR "Failed to request"
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"GPIO%d for keypad\n",
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row_gpios[row_idx]);
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goto err2;
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}
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omap_set_gpio_direction(row_gpios[row_idx], 1);
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}
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}
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setup_timer(&omap_kp->timer, omap_kp_timer, (unsigned long)omap_kp);
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/* get the irq and init timer*/
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tasklet_enable(&kp_tasklet);
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kp_tasklet.data = (unsigned long) omap_kp;
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ret = device_create_file(&pdev->dev, &dev_attr_enable);
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if (ret < 0)
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goto err2;
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/* setup input device */
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set_bit(EV_KEY, input_dev->evbit);
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for (i = 0; keymap[i] != 0; i++)
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set_bit(keymap[i] & KEY_MAX, input_dev->keybit);
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input_dev->name = "omap-keypad";
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input_dev->phys = "omap-keypad/input0";
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input_dev->cdev.dev = &pdev->dev;
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input_dev->private = omap_kp;
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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->keycode = keymap;
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input_dev->keycodesize = sizeof(unsigned int);
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input_dev->keycodemax = pdata->keymapsize;
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ret = input_register_device(omap_kp->input);
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if (ret < 0) {
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printk(KERN_ERR "Unable to register omap-keypad input device\n");
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goto err3;
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}
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if (pdata->dbounce)
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omap_writew(0xff, OMAP_MPUIO_BASE + OMAP_MPUIO_GPIO_DEBOUNCING);
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/* scan current status and enable interrupt */
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omap_kp_scan_keypad(omap_kp, keypad_state);
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if (!cpu_is_omap24xx()) {
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omap_kp->irq = platform_get_irq(pdev, 0);
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if (omap_kp->irq >= 0) {
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if (request_irq(omap_kp->irq, omap_kp_interrupt, 0,
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"omap-keypad", omap_kp) < 0)
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goto err4;
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}
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omap_writew(0, OMAP_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
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} else {
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for (irq_idx = 0; irq_idx < omap_kp->rows; irq_idx++) {
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if (request_irq(OMAP_GPIO_IRQ(row_gpios[irq_idx]),
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omap_kp_interrupt,
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IRQF_TRIGGER_FALLING,
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"omap-keypad", omap_kp) < 0)
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goto err5;
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}
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}
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return 0;
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err5:
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for (i = irq_idx-1; i >=0; i--)
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free_irq(row_gpios[i], 0);
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err4:
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input_unregister_device(omap_kp->input);
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input_dev = NULL;
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err3:
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device_remove_file(&pdev->dev, &dev_attr_enable);
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err2:
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for (i = row_idx-1; i >=0; i--)
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omap_free_gpio(row_gpios[i]);
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err1:
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for (i = col_idx-1; i >=0; i--)
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omap_free_gpio(col_gpios[i]);
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|
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kfree(omap_kp);
|
||||
input_free_device(input_dev);
|
||||
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static int omap_kp_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct omap_kp *omap_kp = platform_get_drvdata(pdev);
|
||||
|
||||
/* disable keypad interrupt handling */
|
||||
tasklet_disable(&kp_tasklet);
|
||||
if (cpu_is_omap24xx()) {
|
||||
int i;
|
||||
for (i = 0; i < omap_kp->cols; i++)
|
||||
omap_free_gpio(col_gpios[i]);
|
||||
for (i = 0; i < omap_kp->rows; i++) {
|
||||
omap_free_gpio(row_gpios[i]);
|
||||
free_irq(OMAP_GPIO_IRQ(row_gpios[i]), 0);
|
||||
}
|
||||
} else {
|
||||
omap_writew(1, OMAP_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
|
||||
free_irq(omap_kp->irq, 0);
|
||||
}
|
||||
|
||||
del_timer_sync(&omap_kp->timer);
|
||||
tasklet_kill(&kp_tasklet);
|
||||
|
||||
/* unregister everything */
|
||||
input_unregister_device(omap_kp->input);
|
||||
|
||||
kfree(omap_kp);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver omap_kp_driver = {
|
||||
.probe = omap_kp_probe,
|
||||
.remove = omap_kp_remove,
|
||||
.suspend = omap_kp_suspend,
|
||||
.resume = omap_kp_resume,
|
||||
.driver = {
|
||||
.name = "omap-keypad",
|
||||
},
|
||||
};
|
||||
|
||||
static int __devinit omap_kp_init(void)
|
||||
{
|
||||
printk(KERN_INFO "OMAP Keypad Driver\n");
|
||||
return platform_driver_register(&omap_kp_driver);
|
||||
}
|
||||
|
||||
static void __exit omap_kp_exit(void)
|
||||
{
|
||||
platform_driver_unregister(&omap_kp_driver);
|
||||
}
|
||||
|
||||
module_init(omap_kp_init);
|
||||
module_exit(omap_kp_exit);
|
||||
|
||||
MODULE_AUTHOR("Timo Teräs");
|
||||
MODULE_DESCRIPTION("OMAP Keypad Driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
|
@ -14,7 +14,10 @@ struct omap_kp_platform_data {
|
|||
int rows;
|
||||
int cols;
|
||||
int *keymap;
|
||||
unsigned int keymapsize;
|
||||
unsigned int rep:1;
|
||||
unsigned long delay;
|
||||
unsigned int dbounce:1;
|
||||
/* specific to OMAP242x*/
|
||||
unsigned int *row_gpios;
|
||||
unsigned int *col_gpios;
|
||||
|
|
|
|||
Loading…
Reference in New Issue