+++ /dev/null
-/*
- * File: drivers/input/keyboard/bf54x-keys.c
- * Based on:
- * Author: Michael Hennerich <hennerich@blackfin.uclinux.org>
- *
- * Created:
- * Description: keypad driver for Analog Devices Blackfin BF54x Processors
- *
- *
- * Modified:
- * Copyright 2007-2008 Analog Devices Inc.
- *
- * Bugs: Enter bugs at http://blackfin.uclinux.org/
- *
- * 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, see the file COPYING, or write
- * to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <linux/module.h>
-
-#include <linux/fs.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/slab.h>
-#include <linux/sched.h>
-#include <linux/pm.h>
-#include <linux/sysctl.h>
-#include <linux/proc_fs.h>
-#include <linux/delay.h>
-#include <linux/platform_device.h>
-#include <linux/input.h>
-
-#include <asm/portmux.h>
-#include <mach/bf54x_keys.h>
-
-#define DRV_NAME "bf54x-keys"
-#define TIME_SCALE 100 /* 100 ns */
-#define MAX_MULT (0xFF * TIME_SCALE)
-#define MAX_RC 8 /* Max Row/Col */
-
-static const u16 per_rows[] = {
- P_KEY_ROW7,
- P_KEY_ROW6,
- P_KEY_ROW5,
- P_KEY_ROW4,
- P_KEY_ROW3,
- P_KEY_ROW2,
- P_KEY_ROW1,
- P_KEY_ROW0,
- 0
-};
-
-static const u16 per_cols[] = {
- P_KEY_COL7,
- P_KEY_COL6,
- P_KEY_COL5,
- P_KEY_COL4,
- P_KEY_COL3,
- P_KEY_COL2,
- P_KEY_COL1,
- P_KEY_COL0,
- 0
-};
-
-struct bf54x_kpad {
- struct input_dev *input;
- int irq;
- unsigned short lastkey;
- unsigned short *keycode;
- struct timer_list timer;
- unsigned int keyup_test_jiffies;
- unsigned short kpad_msel;
- unsigned short kpad_prescale;
- unsigned short kpad_ctl;
-};
-
-static inline int bfin_kpad_find_key(struct bf54x_kpad *bf54x_kpad,
- struct input_dev *input, u16 keyident)
-{
- u16 i;
-
- for (i = 0; i < input->keycodemax; i++)
- if (bf54x_kpad->keycode[i + input->keycodemax] == keyident)
- return bf54x_kpad->keycode[i];
- return -1;
-}
-
-static inline void bfin_keycodecpy(unsigned short *keycode,
- const unsigned int *pdata_kc,
- unsigned short keymapsize)
-{
- unsigned int i;
-
- for (i = 0; i < keymapsize; i++) {
- keycode[i] = pdata_kc[i] & 0xffff;
- keycode[i + keymapsize] = pdata_kc[i] >> 16;
- }
-}
-
-static inline u16 bfin_kpad_get_prescale(u32 timescale)
-{
- u32 sclk = get_sclk();
-
- return ((((sclk / 1000) * timescale) / 1024) - 1);
-}
-
-static inline u16 bfin_kpad_get_keypressed(struct bf54x_kpad *bf54x_kpad)
-{
- return (bfin_read_KPAD_STAT() & KPAD_PRESSED);
-}
-
-static inline void bfin_kpad_clear_irq(void)
-{
- bfin_write_KPAD_STAT(0xFFFF);
- bfin_write_KPAD_ROWCOL(0xFFFF);
-}
-
-static void bfin_kpad_timer(struct timer_list *t)
-{
- struct bf54x_kpad *bf54x_kpad = from_timer(bf54x_kpad, t, timer);
-
- if (bfin_kpad_get_keypressed(bf54x_kpad)) {
- /* Try again later */
- mod_timer(&bf54x_kpad->timer,
- jiffies + bf54x_kpad->keyup_test_jiffies);
- return;
- }
-
- input_report_key(bf54x_kpad->input, bf54x_kpad->lastkey, 0);
- input_sync(bf54x_kpad->input);
-
- /* Clear IRQ Status */
-
- bfin_kpad_clear_irq();
- enable_irq(bf54x_kpad->irq);
-}
-
-static irqreturn_t bfin_kpad_isr(int irq, void *dev_id)
-{
- struct platform_device *pdev = dev_id;
- struct bf54x_kpad *bf54x_kpad = platform_get_drvdata(pdev);
- struct input_dev *input = bf54x_kpad->input;
- int key;
- u16 rowcol = bfin_read_KPAD_ROWCOL();
-
- key = bfin_kpad_find_key(bf54x_kpad, input, rowcol);
-
- input_report_key(input, key, 1);
- input_sync(input);
-
- if (bfin_kpad_get_keypressed(bf54x_kpad)) {
- disable_irq_nosync(bf54x_kpad->irq);
- bf54x_kpad->lastkey = key;
- mod_timer(&bf54x_kpad->timer,
- jiffies + bf54x_kpad->keyup_test_jiffies);
- } else {
- input_report_key(input, key, 0);
- input_sync(input);
-
- bfin_kpad_clear_irq();
- }
-
- return IRQ_HANDLED;
-}
-
-static int bfin_kpad_probe(struct platform_device *pdev)
-{
- struct bf54x_kpad *bf54x_kpad;
- struct bfin_kpad_platform_data *pdata = dev_get_platdata(&pdev->dev);
- struct input_dev *input;
- int i, error;
-
- if (!pdata->rows || !pdata->cols || !pdata->keymap) {
- dev_err(&pdev->dev, "no rows, cols or keymap from pdata\n");
- return -EINVAL;
- }
-
- if (!pdata->keymapsize ||
- pdata->keymapsize > (pdata->rows * pdata->cols)) {
- dev_err(&pdev->dev, "invalid keymapsize\n");
- return -EINVAL;
- }
-
- bf54x_kpad = kzalloc(sizeof(struct bf54x_kpad), GFP_KERNEL);
- if (!bf54x_kpad)
- return -ENOMEM;
-
- platform_set_drvdata(pdev, bf54x_kpad);
-
- /* Allocate memory for keymap followed by private LUT */
- bf54x_kpad->keycode = kmalloc(pdata->keymapsize *
- sizeof(unsigned short) * 2, GFP_KERNEL);
- if (!bf54x_kpad->keycode) {
- error = -ENOMEM;
- goto out;
- }
-
- if (!pdata->debounce_time || pdata->debounce_time > MAX_MULT ||
- !pdata->coldrive_time || pdata->coldrive_time > MAX_MULT) {
- dev_warn(&pdev->dev,
- "invalid platform debounce/columndrive time\n");
- bfin_write_KPAD_MSEL(0xFF0); /* Default MSEL */
- } else {
- bfin_write_KPAD_MSEL(
- ((pdata->debounce_time / TIME_SCALE)
- & DBON_SCALE) |
- (((pdata->coldrive_time / TIME_SCALE) << 8)
- & COLDRV_SCALE));
-
- }
-
- if (!pdata->keyup_test_interval)
- bf54x_kpad->keyup_test_jiffies = msecs_to_jiffies(50);
- else
- bf54x_kpad->keyup_test_jiffies =
- msecs_to_jiffies(pdata->keyup_test_interval);
-
- if (peripheral_request_list((u16 *)&per_rows[MAX_RC - pdata->rows],
- DRV_NAME)) {
- dev_err(&pdev->dev, "requesting peripherals failed\n");
- error = -EFAULT;
- goto out0;
- }
-
- if (peripheral_request_list((u16 *)&per_cols[MAX_RC - pdata->cols],
- DRV_NAME)) {
- dev_err(&pdev->dev, "requesting peripherals failed\n");
- error = -EFAULT;
- goto out1;
- }
-
- bf54x_kpad->irq = platform_get_irq(pdev, 0);
- if (bf54x_kpad->irq < 0) {
- error = -ENODEV;
- goto out2;
- }
-
- error = request_irq(bf54x_kpad->irq, bfin_kpad_isr,
- 0, DRV_NAME, pdev);
- if (error) {
- dev_err(&pdev->dev, "unable to claim irq %d\n",
- bf54x_kpad->irq);
- goto out2;
- }
-
- input = input_allocate_device();
- if (!input) {
- error = -ENOMEM;
- goto out3;
- }
-
- bf54x_kpad->input = input;
-
- input->name = pdev->name;
- input->phys = "bf54x-keys/input0";
- input->dev.parent = &pdev->dev;
-
- input->id.bustype = BUS_HOST;
- input->id.vendor = 0x0001;
- input->id.product = 0x0001;
- input->id.version = 0x0100;
-
- input->keycodesize = sizeof(unsigned short);
- input->keycodemax = pdata->keymapsize;
- input->keycode = bf54x_kpad->keycode;
-
- bfin_keycodecpy(bf54x_kpad->keycode, pdata->keymap, pdata->keymapsize);
-
- /* setup input device */
- __set_bit(EV_KEY, input->evbit);
-
- if (pdata->repeat)
- __set_bit(EV_REP, input->evbit);
-
- for (i = 0; i < input->keycodemax; i++)
- if (bf54x_kpad->keycode[i] <= KEY_MAX)
- __set_bit(bf54x_kpad->keycode[i], input->keybit);
- __clear_bit(KEY_RESERVED, input->keybit);
-
- error = input_register_device(input);
- if (error) {
- dev_err(&pdev->dev, "unable to register input device\n");
- goto out4;
- }
-
- /* Init Keypad Key Up/Release test timer */
-
- timer_setup(&bf54x_kpad->timer, bfin_kpad_timer, 0);
-
- bfin_write_KPAD_PRESCALE(bfin_kpad_get_prescale(TIME_SCALE));
-
- bfin_write_KPAD_CTL((((pdata->cols - 1) << 13) & KPAD_COLEN) |
- (((pdata->rows - 1) << 10) & KPAD_ROWEN) |
- (2 & KPAD_IRQMODE));
-
- bfin_write_KPAD_CTL(bfin_read_KPAD_CTL() | KPAD_EN);
-
- device_init_wakeup(&pdev->dev, 1);
-
- return 0;
-
-out4:
- input_free_device(input);
-out3:
- free_irq(bf54x_kpad->irq, pdev);
-out2:
- peripheral_free_list((u16 *)&per_cols[MAX_RC - pdata->cols]);
-out1:
- peripheral_free_list((u16 *)&per_rows[MAX_RC - pdata->rows]);
-out0:
- kfree(bf54x_kpad->keycode);
-out:
- kfree(bf54x_kpad);
-
- return error;
-}
-
-static int bfin_kpad_remove(struct platform_device *pdev)
-{
- struct bfin_kpad_platform_data *pdata = dev_get_platdata(&pdev->dev);
- struct bf54x_kpad *bf54x_kpad = platform_get_drvdata(pdev);
-
- del_timer_sync(&bf54x_kpad->timer);
- free_irq(bf54x_kpad->irq, pdev);
-
- input_unregister_device(bf54x_kpad->input);
-
- peripheral_free_list((u16 *)&per_rows[MAX_RC - pdata->rows]);
- peripheral_free_list((u16 *)&per_cols[MAX_RC - pdata->cols]);
-
- kfree(bf54x_kpad->keycode);
- kfree(bf54x_kpad);
-
- return 0;
-}
-
-#ifdef CONFIG_PM
-static int bfin_kpad_suspend(struct platform_device *pdev, pm_message_t state)
-{
- struct bf54x_kpad *bf54x_kpad = platform_get_drvdata(pdev);
-
- bf54x_kpad->kpad_msel = bfin_read_KPAD_MSEL();
- bf54x_kpad->kpad_prescale = bfin_read_KPAD_PRESCALE();
- bf54x_kpad->kpad_ctl = bfin_read_KPAD_CTL();
-
- if (device_may_wakeup(&pdev->dev))
- enable_irq_wake(bf54x_kpad->irq);
-
- return 0;
-}
-
-static int bfin_kpad_resume(struct platform_device *pdev)
-{
- struct bf54x_kpad *bf54x_kpad = platform_get_drvdata(pdev);
-
- bfin_write_KPAD_MSEL(bf54x_kpad->kpad_msel);
- bfin_write_KPAD_PRESCALE(bf54x_kpad->kpad_prescale);
- bfin_write_KPAD_CTL(bf54x_kpad->kpad_ctl);
-
- if (device_may_wakeup(&pdev->dev))
- disable_irq_wake(bf54x_kpad->irq);
-
- return 0;
-}
-#else
-# define bfin_kpad_suspend NULL
-# define bfin_kpad_resume NULL
-#endif
-
-static struct platform_driver bfin_kpad_device_driver = {
- .driver = {
- .name = DRV_NAME,
- },
- .probe = bfin_kpad_probe,
- .remove = bfin_kpad_remove,
- .suspend = bfin_kpad_suspend,
- .resume = bfin_kpad_resume,
-};
-module_platform_driver(bfin_kpad_device_driver);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
-MODULE_DESCRIPTION("Keypad driver for BF54x Processors");
-MODULE_ALIAS("platform:bf54x-keys");
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