| /* |
| * linux/drivers/input/keyboard/omap-keypad.c |
| * |
| * OMAP Keypad Driver |
| * |
| * Copyright (C) 2003 Nokia Corporation |
| * Written by Timo Teräs <ext-timo.teras@nokia.com> |
| * |
| * Added support for H2 & H3 Keypad |
| * Copyright (C) 2004 Texas Instruments |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/interrupt.h> |
| #include <linux/types.h> |
| #include <linux/input.h> |
| #include <linux/kernel.h> |
| #include <linux/delay.h> |
| #include <linux/platform_device.h> |
| #include <linux/mutex.h> |
| #include <linux/errno.h> |
| #include <asm/arch/gpio.h> |
| #include <asm/arch/keypad.h> |
| #include <asm/arch/menelaus.h> |
| #include <asm/irq.h> |
| #include <asm/hardware.h> |
| #include <asm/io.h> |
| #include <asm/mach-types.h> |
| #include <asm/arch/mux.h> |
| |
| #undef NEW_BOARD_LEARNING_MODE |
| |
| static void omap_kp_tasklet(unsigned long); |
| static void omap_kp_timer(unsigned long); |
| |
| static unsigned char keypad_state[8]; |
| static DEFINE_MUTEX(kp_enable_mutex); |
| static int kp_enable = 1; |
| static int kp_cur_group = -1; |
| |
| struct omap_kp { |
| struct input_dev *input; |
| struct timer_list timer; |
| int irq; |
| unsigned int rows; |
| unsigned int cols; |
| unsigned long delay; |
| unsigned int debounce; |
| }; |
| |
| DECLARE_TASKLET_DISABLED(kp_tasklet, omap_kp_tasklet, 0); |
| |
| static int *keymap; |
| static unsigned int *row_gpios; |
| static unsigned int *col_gpios; |
| |
| #ifdef CONFIG_ARCH_OMAP2 |
| static void set_col_gpio_val(struct omap_kp *omap_kp, u8 value) |
| { |
| int col; |
| for (col = 0; col < omap_kp->cols; col++) { |
| if (value & (1 << col)) |
| omap_set_gpio_dataout(col_gpios[col], 1); |
| else |
| omap_set_gpio_dataout(col_gpios[col], 0); |
| } |
| } |
| |
| static u8 get_row_gpio_val(struct omap_kp *omap_kp) |
| { |
| int row; |
| u8 value = 0; |
| |
| for (row = 0; row < omap_kp->rows; row++) { |
| if (omap_get_gpio_datain(row_gpios[row])) |
| value |= (1 << row); |
| } |
| return value; |
| } |
| #else |
| #define set_col_gpio_val(x, y) do {} while (0) |
| #define get_row_gpio_val(x) 0 |
| #endif |
| |
| static irqreturn_t omap_kp_interrupt(int irq, void *dev_id) |
| { |
| struct omap_kp *omap_kp = dev_id; |
| |
| /* disable keyboard interrupt and schedule for handling */ |
| if (cpu_is_omap24xx()) { |
| int i; |
| for (i = 0; i < omap_kp->rows; i++) |
| disable_irq(OMAP_GPIO_IRQ(row_gpios[i])); |
| } else |
| /* disable keyboard interrupt and schedule for handling */ |
| omap_writew(1, OMAP_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT); |
| |
| tasklet_schedule(&kp_tasklet); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static void omap_kp_timer(unsigned long data) |
| { |
| tasklet_schedule(&kp_tasklet); |
| } |
| |
| static void omap_kp_scan_keypad(struct omap_kp *omap_kp, unsigned char *state) |
| { |
| int col = 0; |
| |
| /* read the keypad status */ |
| if (cpu_is_omap24xx()) { |
| int i; |
| for (i = 0; i < omap_kp->rows; i++) |
| disable_irq(OMAP_GPIO_IRQ(row_gpios[i])); |
| |
| /* read the keypad status */ |
| for (col = 0; col < omap_kp->cols; col++) { |
| set_col_gpio_val(omap_kp, ~(1 << col)); |
| state[col] = ~(get_row_gpio_val(omap_kp)) & 0x3f; |
| } |
| set_col_gpio_val(omap_kp, 0); |
| |
| } else { |
| /* disable keyboard interrupt and schedule for handling */ |
| omap_writew(1, OMAP_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT); |
| |
| /* read the keypad status */ |
| omap_writew(0xff, OMAP_MPUIO_BASE + OMAP_MPUIO_KBC); |
| for (col = 0; col < omap_kp->cols; col++) { |
| omap_writew(~(1 << col) & 0xff, |
| OMAP_MPUIO_BASE + OMAP_MPUIO_KBC); |
| |
| udelay(omap_kp->delay); |
| |
| state[col] = ~omap_readw(OMAP_MPUIO_BASE + |
| OMAP_MPUIO_KBR_LATCH) & 0xff; |
| } |
| omap_writew(0x00, OMAP_MPUIO_BASE + OMAP_MPUIO_KBC); |
| udelay(2); |
| } |
| } |
| |
| static inline int omap_kp_find_key(int col, int row) |
| { |
| int i, key; |
| |
| key = KEY(col, row, 0); |
| for (i = 0; keymap[i] != 0; i++) |
| if ((keymap[i] & 0xff000000) == key) |
| return keymap[i] & 0x00ffffff; |
| return -1; |
| } |
| |
| static void omap_kp_tasklet(unsigned long data) |
| { |
| struct omap_kp *omap_kp_data = (struct omap_kp *) data; |
| unsigned char new_state[8], changed, key_down = 0; |
| int col, row; |
| int spurious = 0; |
| |
| /* check for any changes */ |
| omap_kp_scan_keypad(omap_kp_data, new_state); |
| |
| /* check for changes and print those */ |
| for (col = 0; col < omap_kp_data->cols; col++) { |
| changed = new_state[col] ^ keypad_state[col]; |
| key_down |= new_state[col]; |
| if (changed == 0) |
| continue; |
| |
| for (row = 0; row < omap_kp_data->rows; row++) { |
| int key; |
| if (!(changed & (1 << row))) |
| continue; |
| #ifdef NEW_BOARD_LEARNING_MODE |
| printk(KERN_INFO "omap-keypad: key %d-%d %s\n", col, |
| row, (new_state[col] & (1 << row)) ? |
| "pressed" : "released"); |
| #else |
| key = omap_kp_find_key(col, row); |
| if (key < 0) { |
| printk(KERN_WARNING |
| "omap-keypad: Spurious key event %d-%d\n", |
| col, row); |
| /* We scan again after a couple of seconds */ |
| spurious = 1; |
| continue; |
| } |
| |
| if (!(kp_cur_group == (key & GROUP_MASK) || |
| kp_cur_group == -1)) |
| continue; |
| |
| kp_cur_group = key & GROUP_MASK; |
| input_report_key(omap_kp_data->input, key & ~GROUP_MASK, |
| new_state[col] & (1 << row)); |
| #endif |
| } |
| } |
| memcpy(keypad_state, new_state, sizeof(keypad_state)); |
| |
| if (key_down) { |
| int delay = HZ / 20; |
| /* some key is pressed - keep irq disabled and use timer |
| * to poll the keypad */ |
| if (spurious) |
| delay = 2 * HZ; |
| mod_timer(&omap_kp_data->timer, jiffies + delay); |
| } else { |
| /* enable interrupts */ |
| if (cpu_is_omap24xx()) { |
| int i; |
| for (i = 0; i < omap_kp_data->rows; i++) |
| enable_irq(OMAP_GPIO_IRQ(row_gpios[i])); |
| } else { |
| omap_writew(0, OMAP_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT); |
| kp_cur_group = -1; |
| } |
| } |
| } |
| |
| static ssize_t omap_kp_enable_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| return sprintf(buf, "%u\n", kp_enable); |
| } |
| |
| static ssize_t omap_kp_enable_store(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| int state; |
| |
| if (sscanf(buf, "%u", &state) != 1) |
| return -EINVAL; |
| |
| if ((state != 1) && (state != 0)) |
| return -EINVAL; |
| |
| mutex_lock(&kp_enable_mutex); |
| if (state != kp_enable) { |
| if (state) |
| enable_irq(INT_KEYBOARD); |
| else |
| disable_irq(INT_KEYBOARD); |
| kp_enable = state; |
| } |
| mutex_unlock(&kp_enable_mutex); |
| |
| return strnlen(buf, count); |
| } |
| |
| static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, omap_kp_enable_show, omap_kp_enable_store); |
| |
| #ifdef CONFIG_PM |
| static int omap_kp_suspend(struct platform_device *dev, pm_message_t state) |
| { |
| /* Nothing yet */ |
| |
| return 0; |
| } |
| |
| static int omap_kp_resume(struct platform_device *dev) |
| { |
| /* Nothing yet */ |
| |
| return 0; |
| } |
| #else |
| #define omap_kp_suspend NULL |
| #define omap_kp_resume NULL |
| #endif |
| |
| static int __init omap_kp_probe(struct platform_device *pdev) |
| { |
| struct omap_kp *omap_kp; |
| struct input_dev *input_dev; |
| struct omap_kp_platform_data *pdata = pdev->dev.platform_data; |
| int i, col_idx, row_idx, irq_idx, ret; |
| |
| if (!pdata->rows || !pdata->cols || !pdata->keymap) { |
| printk(KERN_ERR "No rows, cols or keymap from pdata\n"); |
| return -EINVAL; |
| } |
| |
| omap_kp = kzalloc(sizeof(struct omap_kp), GFP_KERNEL); |
| input_dev = input_allocate_device(); |
| if (!omap_kp || !input_dev) { |
| kfree(omap_kp); |
| input_free_device(input_dev); |
| return -ENOMEM; |
| } |
| |
| platform_set_drvdata(pdev, omap_kp); |
| |
| omap_kp->input = input_dev; |
| |
| /* Disable the interrupt for the MPUIO keyboard */ |
| if (!cpu_is_omap24xx()) |
| omap_writew(1, OMAP_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT); |
| |
| keymap = pdata->keymap; |
| |
| if (pdata->rep) |
| __set_bit(EV_REP, input_dev->evbit); |
| |
| if (pdata->delay) |
| omap_kp->delay = pdata->delay; |
| |
| if (pdata->row_gpios && pdata->col_gpios) { |
| row_gpios = pdata->row_gpios; |
| col_gpios = pdata->col_gpios; |
| } |
| |
| omap_kp->rows = pdata->rows; |
| omap_kp->cols = pdata->cols; |
| |
| if (cpu_is_omap24xx()) { |
| /* Cols: outputs */ |
| for (col_idx = 0; col_idx < omap_kp->cols; col_idx++) { |
| if (omap_request_gpio(col_gpios[col_idx]) < 0) { |
| printk(KERN_ERR "Failed to request" |
| "GPIO%d for keypad\n", |
| col_gpios[col_idx]); |
| goto err1; |
| } |
| omap_set_gpio_direction(col_gpios[col_idx], 0); |
| } |
| /* Rows: inputs */ |
| for (row_idx = 0; row_idx < omap_kp->rows; row_idx++) { |
| if (omap_request_gpio(row_gpios[row_idx]) < 0) { |
| printk(KERN_ERR "Failed to request" |
| "GPIO%d for keypad\n", |
| row_gpios[row_idx]); |
| goto err2; |
| } |
| omap_set_gpio_direction(row_gpios[row_idx], 1); |
| } |
| } else { |
| col_idx = 0; |
| row_idx = 0; |
| } |
| |
| setup_timer(&omap_kp->timer, omap_kp_timer, (unsigned long)omap_kp); |
| |
| /* get the irq and init timer*/ |
| tasklet_enable(&kp_tasklet); |
| kp_tasklet.data = (unsigned long) omap_kp; |
| |
| ret = device_create_file(&pdev->dev, &dev_attr_enable); |
| if (ret < 0) |
| goto err2; |
| |
| /* setup input device */ |
| __set_bit(EV_KEY, input_dev->evbit); |
| for (i = 0; keymap[i] != 0; i++) |
| __set_bit(keymap[i] & KEY_MAX, input_dev->keybit); |
| input_dev->name = "omap-keypad"; |
| input_dev->phys = "omap-keypad/input0"; |
| input_dev->dev.parent = &pdev->dev; |
| |
| input_dev->id.bustype = BUS_HOST; |
| input_dev->id.vendor = 0x0001; |
| input_dev->id.product = 0x0001; |
| input_dev->id.version = 0x0100; |
| |
| ret = input_register_device(omap_kp->input); |
| if (ret < 0) { |
| printk(KERN_ERR "Unable to register omap-keypad input device\n"); |
| goto err3; |
| } |
| |
| if (pdata->dbounce) |
| omap_writew(0xff, OMAP_MPUIO_BASE + OMAP_MPUIO_GPIO_DEBOUNCING); |
| |
| /* scan current status and enable interrupt */ |
| 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"); |