+++ /dev/null
-/*
- * drivers/input/keyboard/omap-twl4030keypad.c
- *
- * Copyright (C) 2007 Texas Instruments, Inc.
- * Copyright (C) 2008 Nokia Corporation
- *
- * Code re-written for 2430SDP by:
- * Syed Mohammed Khasim <x0khasim@ti.com>
- *
- * Initial Code:
- * Manjunatha G K <manjugk@ti.com>
- *
- * 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/mutex.h>
-#include <linux/delay.h>
-#include <linux/bitops.h>
-#include <linux/platform_device.h>
-#include <linux/i2c.h>
-#include <linux/i2c/twl4030.h>
-#include <linux/irq.h>
-#include "twl4030-keypad.h"
-
-#define PTV_PRESCALER 4
-
-#define MAX_ROWS 8 /* TWL4030 hardlimit */
-#define ROWCOL_MASK 0xFF000000
-#define KEYNUM_MASK 0x00FFFFFF
-#define KEY(col, row, val) (((col) << 28) | ((row) << 24) | (val))
-
-/* Global variables */
-
-struct omap_keypad {
- int *keymap;
- unsigned int keymapsize;
- u16 kp_state[MAX_ROWS];
- int n_rows;
- int n_cols;
- int irq;
-
- struct device *dbg_dev;
- struct input_dev *omap_twl4030kp;
-
- /* sync read/write */
- struct mutex mutex;
-};
-
-static int twl4030_kpread(struct omap_keypad *kp,
- u32 module, u8 *data, u32 reg, u8 num_bytes)
-{
- int ret;
-
- ret = twl4030_i2c_read(module, data, reg, num_bytes);
- if (ret < 0) {
- dev_warn(kp->dbg_dev,
- "Couldn't read TWL4030: %X - ret %d[%x]\n",
- reg, ret, ret);
- return ret;
- }
- return ret;
-}
-
-static int twl4030_kpwrite_u8(struct omap_keypad *kp,
- u32 module, u8 data, u32 reg)
-{
- int ret;
-
- ret = twl4030_i2c_write_u8(module, data, reg);
- if (ret < 0) {
- dev_warn(kp->dbg_dev,
- "Could not write TWL4030: %X - ret %d[%x]\n",
- reg, ret, ret);
- return ret;
- }
- return ret;
-}
-
-static int omap_kp_find_key(struct omap_keypad *kp, int col, int row)
-{
- int i, rc;
-
- rc = KEY(col, row, 0);
- for (i = 0; i < kp->keymapsize; i++)
- if ((kp->keymap[i] & ROWCOL_MASK) == rc)
- return kp->keymap[i] & KEYNUM_MASK;
-
- return -EINVAL;
-}
-
-static inline u16 omap_kp_col_xlate(struct omap_keypad *kp, u8 col)
-{
- /* If all bits in a row are active for all coloumns then
- * we have that row line connected to gnd. Mark this
- * key on as if it was on matrix position n_cols (ie
- * one higher than the size of the matrix).
- */
- if (col == 0xFF)
- return 1 << kp->n_cols;
- else
- return col & ((1 << kp->n_cols) - 1);
-}
-
-static int omap_kp_read_kp_matrix_state(struct omap_keypad *kp, u16 *state)
-{
- u8 new_state[MAX_ROWS];
- int row;
- int ret = twl4030_kpread(kp, TWL4030_MODULE_KEYPAD,
- new_state, KEYP_FULL_CODE_7_0, kp->n_rows);
- if (ret >= 0) {
- for (row = 0; row < kp->n_rows; row++)
- state[row] = omap_kp_col_xlate(kp, new_state[row]);
- }
- return ret;
-}
-
-static int omap_kp_is_in_ghost_state(struct omap_keypad *kp, u16 *key_state)
-{
- int i;
- u16 check = 0;
-
- for (i = 0; i < kp->n_rows; i++) {
- u16 col = key_state[i];
-
- if ((col & check) && hweight16(col) > 1)
- return 1;
- check |= col;
- }
-
- return 0;
-}
-
-static void twl4030_kp_scan(struct omap_keypad *kp, int release_all)
-{
- u16 new_state[MAX_ROWS];
- int col, row;
-
- if (release_all)
- memset(new_state, 0, sizeof(new_state));
- else {
- /* check for any changes */
- int ret = omap_kp_read_kp_matrix_state(kp, new_state);
- if (ret < 0) /* panic ... */
- return;
-
- if (omap_kp_is_in_ghost_state(kp, new_state))
- return;
- }
-
- mutex_lock(&kp->mutex);
-
- /* check for changes and print those */
- for (row = 0; row < kp->n_rows; row++) {
- int changed = new_state[row] ^ kp->kp_state[row];
-
- if (!changed)
- continue;
-
- for (col = 0; col < kp->n_cols; col++) {
- int key;
-
- if (!(changed & (1 << col)))
- continue;
-
- dev_dbg(kp->dbg_dev, "key [%d:%d] %s\n", row, col,
- (new_state[row] & (1 << col)) ?
- "press" : "release");
-
- key = omap_kp_find_key(kp, col, row);
- if (key < 0)
- dev_warn(kp->dbg_dev,
- "Spurious key event %d-%d\n",
- col, row);
- else
- input_report_key(kp->omap_twl4030kp, key,
- new_state[row] & (1 << col));
- }
- kp->kp_state[row] = new_state[row];
- }
-
- mutex_unlock(&kp->mutex);
-}
-
-/*
- * Keypad interrupt handler
- */
-static irqreturn_t do_kp_irq(int irq, void *_kp)
-{
- struct omap_keypad *kp = _kp;
- u8 reg;
- int ret;
-
-#ifdef CONFIG_LOCKDEP
- /* WORKAROUND for lockdep forcing IRQF_DISABLED on us, which
- * we don't want and can't tolerate. Although it might be
- * friendlier not to borrow this thread context...
- */
- local_irq_enable();
-#endif
-
- /* Read & Clear TWL4030 pending interrupt */
- ret = twl4030_kpread(kp, TWL4030_MODULE_KEYPAD, ®, KEYP_ISR1, 1);
-
- /* Release all keys if I2C has gone bad or
- * the KEYP has gone to idle state */
- if ((ret >= 0) && (reg & KEYP_IMR1_KP))
- twl4030_kp_scan(kp, 0);
- else
- twl4030_kp_scan(kp, 1);
-
- return IRQ_HANDLED;
-}
-
-/*
- * Registers keypad device with input sub system
- * and configures TWL4030 keypad registers
- */
-static int __init omap_kp_probe(struct platform_device *pdev)
-{
- u8 reg;
- int i;
- int ret = 0;
- struct omap_keypad *kp;
- struct twl4030_keypad_data *pdata = pdev->dev.platform_data;
-
- kp = kzalloc(sizeof(*kp), GFP_KERNEL);
- if (!kp)
- return -ENOMEM;
-
- if (!pdata->rows || !pdata->cols || !pdata->keymap) {
- dev_err(&pdev->dev, "No rows, cols or keymap from pdata\n");
- kfree(kp);
- return -EINVAL;
- }
-
- dev_set_drvdata(&pdev->dev, kp);
-
- /* Get the debug Device */
- kp->dbg_dev = &pdev->dev;
-
- kp->omap_twl4030kp = input_allocate_device();
- if (!kp->omap_twl4030kp) {
- kfree(kp);
- return -ENOMEM;
- }
-
- mutex_init(&kp->mutex);
-
- kp->keymap = pdata->keymap;
- kp->keymapsize = pdata->keymapsize;
- kp->n_rows = pdata->rows;
- kp->n_cols = pdata->cols;
- kp->irq = pdata->irq;
-
- /* setup input device */
- set_bit(EV_KEY, kp->omap_twl4030kp->evbit);
-
- /* Enable auto repeat feature of Linux input subsystem */
- if (pdata->rep)
- set_bit(EV_REP, kp->omap_twl4030kp->evbit);
-
- for (i = 0; i < kp->keymapsize; i++)
- set_bit(kp->keymap[i] & KEYNUM_MASK,
- kp->omap_twl4030kp->keybit);
-
- kp->omap_twl4030kp->name = "omap_twl4030keypad";
- kp->omap_twl4030kp->phys = "omap_twl4030keypad/input0";
- kp->omap_twl4030kp->dev.parent = &pdev->dev;
-
- kp->omap_twl4030kp->id.bustype = BUS_HOST;
- kp->omap_twl4030kp->id.vendor = 0x0001;
- kp->omap_twl4030kp->id.product = 0x0001;
- kp->omap_twl4030kp->id.version = 0x0003;
-
- kp->omap_twl4030kp->keycode = kp->keymap;
- kp->omap_twl4030kp->keycodesize = sizeof(unsigned int);
- kp->omap_twl4030kp->keycodemax = kp->keymapsize;
-
- ret = input_register_device(kp->omap_twl4030kp);
- if (ret < 0) {
- dev_err(kp->dbg_dev,
- "Unable to register twl4030 keypad device\n");
- goto err2;
- }
-
- /* Disable auto-repeat */
- reg = KEYP_CTRL_NOAUTORPT;
- ret = twl4030_kpwrite_u8(kp, TWL4030_MODULE_KEYPAD, reg, KEYP_CTRL);
- if (ret < 0)
- goto err3;
-
- /* Enable TO rising and KP rising and falling edge detection */
- reg = KEYP_EDR_KP_BOTH | KEYP_EDR_TO_RISING;
- ret = twl4030_kpwrite_u8(kp, TWL4030_MODULE_KEYPAD, reg, KEYP_EDR);
- if (ret < 0)
- goto err3;
-
- /* Set PTV prescaler Field */
- reg = (PTV_PRESCALER << KEYP_LK_PTV_PTV_SHIFT);
- ret = twl4030_kpwrite_u8(kp, TWL4030_MODULE_KEYPAD, reg, KEYP_LK_PTV);
- if (ret < 0)
- goto err3;
-
- /* Set key debounce time to 20 ms */
- i = KEYP_PERIOD_US(20000, PTV_PRESCALER);
- ret = twl4030_kpwrite_u8(kp, TWL4030_MODULE_KEYPAD, i, KEYP_DEB);
- if (ret < 0)
- goto err3;
-
- /* Set timeout period to 100 ms */
- i = KEYP_PERIOD_US(200000, PTV_PRESCALER);
- ret = twl4030_kpwrite_u8(kp, TWL4030_MODULE_KEYPAD,
- (i & 0xFF), KEYP_TIMEOUT_L);
- if (ret < 0)
- goto err3;
-
- ret = twl4030_kpwrite_u8(kp, TWL4030_MODULE_KEYPAD,
- (i >> 8), KEYP_TIMEOUT_H);
- if (ret < 0)
- goto err3;
-
- /* Enable Clear-on-Read */
- reg = KEYP_SIH_CTRL_COR | KEYP_SIH_CTRL_PEND_DIS;
- ret = twl4030_kpwrite_u8(kp, TWL4030_MODULE_KEYPAD,
- reg, KEYP_SIH_CTRL);
- if (ret < 0)
- goto err3;
-
- /*
- * This ISR will always execute in kernel thread context because of
- * the need to access the TWL4030 over the I2C bus.
- */
- ret = request_irq(kp->irq, do_kp_irq, 0, pdev->name, kp);
- if (ret < 0) {
- dev_info(kp->dbg_dev, "request_irq failed for irq no=%d\n",
- kp->irq);
- goto err3;
- } else {
- /* Enable KP and TO interrupts now. */
- reg = ~(KEYP_IMR1_KP | KEYP_IMR1_TO);
- ret = twl4030_kpwrite_u8(kp, TWL4030_MODULE_KEYPAD,
- reg, KEYP_IMR1);
- if (ret < 0)
- goto err5;
- }
-
- ret = omap_kp_read_kp_matrix_state(kp, kp->kp_state);
- if (ret < 0)
- goto err4;
-
- return ret;
-err5:
- /* mask all events - we don't care about the result */
- (void) twl4030_kpwrite_u8(kp, TWL4030_MODULE_KEYPAD, 0xff, KEYP_IMR1);
-err4:
- free_irq(kp->irq, NULL);
-err3:
- input_unregister_device(kp->omap_twl4030kp);
-err2:
- input_free_device(kp->omap_twl4030kp);
-
- return -ENODEV;
-}
-
-static int omap_kp_remove(struct platform_device *pdev)
-{
- struct omap_keypad *kp = dev_get_drvdata(&pdev->dev);
-
- free_irq(kp->irq, kp);
- input_unregister_device(kp->omap_twl4030kp);
- kfree(kp);
-
- return 0;
-}
-
-
-static struct platform_driver omap_kp_driver = {
- .probe = omap_kp_probe,
- .remove = __devexit_p(omap_kp_remove),
- .driver = {
- .name = "twl4030_keypad",
- .owner = THIS_MODULE,
- },
-};
-
-/*
- * OMAP TWL4030 Keypad init
- */
-static int __devinit omap_kp_init(void)
-{
- 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_ALIAS("platform:twl4030_keypad");
-MODULE_AUTHOR("Texas Instruments");
-MODULE_DESCRIPTION("OMAP TWL4030 Keypad Driver");
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * drivers/input/keyboard/twl4030-keypad.h
- *
- * Copyright (C) 2006-2007 Texas Instruments, Inc.
- *
- * Intial Code:
- * Syed Mohammed Khasim <x0khasim@ti.com>
- *
- * 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
- */
-#ifndef __TWL4030_KEYPAD_H__
-#define __TWL4030_KEYPAD_H__
-
-/* Register Definitions */
-#define KEYP_CTRL 0x00
-#define KEYP_DEB 0x01
-#define KEYP_LONG_KEY 0x02
-#define KEYP_LK_PTV 0x03
-#define KEYP_TIMEOUT_L 0x04
-#define KEYP_TIMEOUT_H 0x05
-#define KEYP_FULL_CODE_7_0 0x09
-#define KEYP_ISR1 0x11
-#define KEYP_IMR1 0x12
-#define KEYP_EDR 0x16
-#define KEYP_SIH_CTRL 0x17
-
-/* KEYP_CTRL_REG Fields */
-#define KEYP_CTRL_SOFT_NRST 0x01
-#define KEYP_CTRL_SOFTMODEN 0x02
-#define KEYP_CTRL_LK_EN 0x04
-#define KEYP_CTRL_TOE_EN 0x08
-#define KEYP_CTRL_TOLE_EN 0x10
-#define KEYP_CTRL_RP_EN 0x20
-#define KEYP_CTRL_KBD_ON 0x40
-
-
-#define KEYP_CTRL_NOAUTORPT (KEYP_CTRL_SOFT_NRST | \
- KEYP_CTRL_SOFTMODEN | \
- KEYP_CTRL_TOE_EN | \
- KEYP_CTRL_KBD_ON)
-
-/* KEYP_DEB, KEYP_LONG_KEY, KEYP_TIMEOUT_x*/
-#define KEYP_PERIOD_US(T, prescale) (T / (31 << (prescale + 1)) - 1)
-
-/* KEYP_LK_PTV_REG Fields */
-#define KEYP_LK_PTV_PTV_SHIFT 5
-
-/* KEYP_IMR1 Fields */
-#define KEYP_IMR1_MIS 0x08
-#define KEYP_IMR1_TO 0x04
-#define KEYP_IMR1_LK 0x02
-#define KEYP_IMR1_KP 0x01
-
-/* KEYP_EDR Fields */
-#define KEYP_EDR_KP_FALLING 0x01
-#define KEYP_EDR_KP_RISING 0x02
-#define KEYP_EDR_KP_BOTH 0x03
-#define KEYP_EDR_LK_FALLING 0x04
-#define KEYP_EDR_LK_RISING 0x08
-#define KEYP_EDR_TO_FALLING 0x10
-#define KEYP_EDR_TO_RISING 0x20
-#define KEYP_EDR_MIS_FALLING 0x40
-#define KEYP_EDR_MIS_RISING 0x80
-
-/* KEYP_SIH_CTRL Fields */
-#define KEYP_SIH_CTRL_COR 0x04
-#define KEYP_SIH_CTRL_PEND_DIS 0x02
-#define KEYP_SIH_CTRL_EXCL_EN 0x01
-
-#endif /* End of __TWL4030-KEYPAD_H__ */
git.openpandora.org / pandora-kernel.git / commitdiff