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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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+
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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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+
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+#undef NEW_BOARD_LEARNING_MODE
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+
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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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+
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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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+
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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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+
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+DECLARE_TASKLET_DISABLED(kp_tasklet, omap_kp_tasklet, 0);
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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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+ tasklet_schedule(&kp_tasklet);
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+
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+ return IRQ_HANDLED;
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+}
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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+ udelay(omap_kp->delay);
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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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+ if (sscanf(buf, "%u", &state) != 1)
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+ return -EINVAL;
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+
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+ if ((state != 1) && (state != 0))
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+ return -EINVAL;
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+
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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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+
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+ return strnlen(buf, count);
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+}
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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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+
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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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+
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+ return 0;
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+}
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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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+
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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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+
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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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+
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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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+
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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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+
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+ platform_set_drvdata(pdev, omap_kp);
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+
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+ omap_kp->input = input_dev;
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+
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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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+
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+ keymap = pdata->keymap;
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+
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+ if (pdata->rep)
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+ set_bit(EV_REP, input_dev->evbit);
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+
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+ if (pdata->delay)
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+ omap_kp->delay = pdata->delay;
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+
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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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+
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+ omap_kp->rows = pdata->rows;
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+ omap_kp->cols = pdata->cols;
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+
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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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+
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+ setup_timer(&omap_kp->timer, omap_kp_timer, (unsigned long)omap_kp);
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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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+ /* scan current status and enable interrupt */
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+ omap_kp_scan_keypad(omap_kp, keypad_state);
|
|
|
+ if (!cpu_is_omap24xx()) {
|
|
|
+ omap_kp->irq = platform_get_irq(pdev, 0);
|
|
|
+ if (omap_kp->irq >= 0) {
|
|
|
+ if (request_irq(omap_kp->irq, omap_kp_interrupt, 0,
|
|
|
+ "omap-keypad", omap_kp) < 0)
|
|
|
+ goto err4;
|
|
|
+ }
|
|
|
+ omap_writew(0, OMAP_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
|
|
|
+ } else {
|
|
|
+ for (irq_idx = 0; irq_idx < omap_kp->rows; irq_idx++) {
|
|
|
+ if (request_irq(OMAP_GPIO_IRQ(row_gpios[irq_idx]),
|
|
|
+ omap_kp_interrupt,
|
|
|
+ IRQF_TRIGGER_FALLING,
|
|
|
+ "omap-keypad", omap_kp) < 0)
|
|
|
+ goto err5;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ return 0;
|
|
|
+err5:
|
|
|
+ for (i = irq_idx-1; i >=0; i--)
|
|
|
+ free_irq(row_gpios[i], 0);
|
|
|
+err4:
|
|
|
+ input_unregister_device(omap_kp->input);
|
|
|
+ input_dev = NULL;
|
|
|
+err3:
|
|
|
+ device_remove_file(&pdev->dev, &dev_attr_enable);
|
|
|
+err2:
|
|
|
+ for (i = row_idx-1; i >=0; i--)
|
|
|
+ omap_free_gpio(row_gpios[i]);
|
|
|
+err1:
|
|
|
+ for (i = col_idx-1; i >=0; i--)
|
|
|
+ omap_free_gpio(col_gpios[i]);
|
|
|
+
|
|
|
+ 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");
|