diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/input/keyboard/twl4030_keypad.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/input/keyboard/twl4030_keypad.c | 467 |
1 files changed, 0 insertions, 467 deletions
diff --git a/ANDROID_3.4.5/drivers/input/keyboard/twl4030_keypad.c b/ANDROID_3.4.5/drivers/input/keyboard/twl4030_keypad.c deleted file mode 100644 index 67bec14e..00000000 --- a/ANDROID_3.4.5/drivers/input/keyboard/twl4030_keypad.c +++ /dev/null @@ -1,467 +0,0 @@ -/* - * twl4030_keypad.c - driver for 8x8 keypad controller in twl4030 chips - * - * 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/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/input.h> -#include <linux/platform_device.h> -#include <linux/i2c/twl.h> -#include <linux/slab.h> - -/* - * The TWL4030 family chips include a keypad controller that supports - * up to an 8x8 switch matrix. The controller can issue system wakeup - * events, since it uses only the always-on 32KiHz oscillator, and has - * an internal state machine that decodes pressed keys, including - * multi-key combinations. - * - * This driver lets boards define what keycodes they wish to report for - * which scancodes, as part of the "struct twl4030_keypad_data" used in - * the probe() routine. - * - * See the TPS65950 documentation; that's the general availability - * version of the TWL5030 second generation part. - */ -#define TWL4030_MAX_ROWS 8 /* TWL4030 hard limit */ -#define TWL4030_MAX_COLS 8 -/* - * Note that we add space for an extra column so that we can handle - * row lines connected to the gnd (see twl4030_col_xlate()). - */ -#define TWL4030_ROW_SHIFT 4 -#define TWL4030_KEYMAP_SIZE (TWL4030_MAX_ROWS << TWL4030_ROW_SHIFT) - -struct twl4030_keypad { - unsigned short keymap[TWL4030_KEYMAP_SIZE]; - u16 kp_state[TWL4030_MAX_ROWS]; - unsigned n_rows; - unsigned n_cols; - unsigned irq; - - struct device *dbg_dev; - struct input_dev *input; -}; - -/*----------------------------------------------------------------------*/ - -/* arbitrary prescaler value 0..7 */ -#define PTV_PRESCALER 4 - -/* Register Offsets */ -#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_KBC 0x06 -#define KEYP_KBR 0x07 -#define KEYP_SMS 0x08 -#define KEYP_FULL_CODE_7_0 0x09 /* row 0 column status */ -#define KEYP_FULL_CODE_15_8 0x0a /* ... row 1 ... */ -#define KEYP_FULL_CODE_23_16 0x0b -#define KEYP_FULL_CODE_31_24 0x0c -#define KEYP_FULL_CODE_39_32 0x0d -#define KEYP_FULL_CODE_47_40 0x0e -#define KEYP_FULL_CODE_55_48 0x0f -#define KEYP_FULL_CODE_63_56 0x10 -#define KEYP_ISR1 0x11 -#define KEYP_IMR1 0x12 -#define KEYP_ISR2 0x13 -#define KEYP_IMR2 0x14 -#define KEYP_SIR 0x15 -#define KEYP_EDR 0x16 /* edge triggers */ -#define KEYP_SIH_CTRL 0x17 - -/* KEYP_CTRL_REG Fields */ -#define KEYP_CTRL_SOFT_NRST BIT(0) -#define KEYP_CTRL_SOFTMODEN BIT(1) -#define KEYP_CTRL_LK_EN BIT(2) -#define KEYP_CTRL_TOE_EN BIT(3) -#define KEYP_CTRL_TOLE_EN BIT(4) -#define KEYP_CTRL_RP_EN BIT(5) -#define KEYP_CTRL_KBD_ON BIT(6) - -/* 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_{IMR,ISR,SIR} Fields */ -#define KEYP_IMR1_MIS BIT(3) -#define KEYP_IMR1_TO BIT(2) -#define KEYP_IMR1_LK BIT(1) -#define KEYP_IMR1_KP BIT(0) - -/* 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 - - -/*----------------------------------------------------------------------*/ - -static int twl4030_kpread(struct twl4030_keypad *kp, - u8 *data, u32 reg, u8 num_bytes) -{ - int ret = twl_i2c_read(TWL4030_MODULE_KEYPAD, 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; -} - -static int twl4030_kpwrite_u8(struct twl4030_keypad *kp, u8 data, u32 reg) -{ - int ret = twl_i2c_write_u8(TWL4030_MODULE_KEYPAD, data, reg); - - if (ret < 0) - dev_warn(kp->dbg_dev, - "Could not write TWL4030: %X - ret %d[%x]\n", - reg, ret, ret); - - return ret; -} - -static inline u16 twl4030_col_xlate(struct twl4030_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 twl4030_read_kp_matrix_state(struct twl4030_keypad *kp, u16 *state) -{ - u8 new_state[TWL4030_MAX_ROWS]; - int row; - int ret = twl4030_kpread(kp, new_state, - KEYP_FULL_CODE_7_0, kp->n_rows); - if (ret >= 0) - for (row = 0; row < kp->n_rows; row++) - state[row] = twl4030_col_xlate(kp, new_state[row]); - - return ret; -} - -static bool twl4030_is_in_ghost_state(struct twl4030_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 true; - - check |= col; - } - - return false; -} - -static void twl4030_kp_scan(struct twl4030_keypad *kp, bool release_all) -{ - struct input_dev *input = kp->input; - u16 new_state[TWL4030_MAX_ROWS]; - int col, row; - - if (release_all) - memset(new_state, 0, sizeof(new_state)); - else { - /* check for any changes */ - int ret = twl4030_read_kp_matrix_state(kp, new_state); - - if (ret < 0) /* panic ... */ - return; - - if (twl4030_is_in_ghost_state(kp, new_state)) - return; - } - - /* 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; - - /* Extra column handles "all gnd" rows */ - for (col = 0; col < kp->n_cols + 1; col++) { - int code; - - if (!(changed & (1 << col))) - continue; - - dev_dbg(kp->dbg_dev, "key [%d:%d] %s\n", row, col, - (new_state[row] & (1 << col)) ? - "press" : "release"); - - code = MATRIX_SCAN_CODE(row, col, TWL4030_ROW_SHIFT); - input_event(input, EV_MSC, MSC_SCAN, code); - input_report_key(input, kp->keymap[code], - new_state[row] & (1 << col)); - } - kp->kp_state[row] = new_state[row]; - } - input_sync(input); -} - -/* - * Keypad interrupt handler - */ -static irqreturn_t do_kp_irq(int irq, void *_kp) -{ - struct twl4030_keypad *kp = _kp; - u8 reg; - int ret; - - /* Read & Clear TWL4030 pending interrupt */ - ret = twl4030_kpread(kp, ®, 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, false); - else - twl4030_kp_scan(kp, true); - - return IRQ_HANDLED; -} - -static int __devinit twl4030_kp_program(struct twl4030_keypad *kp) -{ - u8 reg; - int i; - - /* Enable controller, with hardware decoding but not autorepeat */ - reg = KEYP_CTRL_SOFT_NRST | KEYP_CTRL_SOFTMODEN - | KEYP_CTRL_TOE_EN | KEYP_CTRL_KBD_ON; - if (twl4030_kpwrite_u8(kp, reg, KEYP_CTRL) < 0) - return -EIO; - - /* NOTE: we could use sih_setup() here to package keypad - * event sources as four different IRQs ... but we don't. - */ - - /* Enable TO rising and KP rising and falling edge detection */ - reg = KEYP_EDR_KP_BOTH | KEYP_EDR_TO_RISING; - if (twl4030_kpwrite_u8(kp, reg, KEYP_EDR) < 0) - return -EIO; - - /* Set PTV prescaler Field */ - reg = (PTV_PRESCALER << KEYP_LK_PTV_PTV_SHIFT); - if (twl4030_kpwrite_u8(kp, reg, KEYP_LK_PTV) < 0) - return -EIO; - - /* Set key debounce time to 20 ms */ - i = KEYP_PERIOD_US(20000, PTV_PRESCALER); - if (twl4030_kpwrite_u8(kp, i, KEYP_DEB) < 0) - return -EIO; - - /* Set timeout period to 200 ms */ - i = KEYP_PERIOD_US(200000, PTV_PRESCALER); - if (twl4030_kpwrite_u8(kp, (i & 0xFF), KEYP_TIMEOUT_L) < 0) - return -EIO; - - if (twl4030_kpwrite_u8(kp, (i >> 8), KEYP_TIMEOUT_H) < 0) - return -EIO; - - /* - * Enable Clear-on-Read; disable remembering events that fire - * after the IRQ but before our handler acks (reads) them, - */ - reg = TWL4030_SIH_CTRL_COR_MASK | TWL4030_SIH_CTRL_PENDDIS_MASK; - if (twl4030_kpwrite_u8(kp, reg, KEYP_SIH_CTRL) < 0) - return -EIO; - - /* initialize key state; irqs update it from here on */ - if (twl4030_read_kp_matrix_state(kp, kp->kp_state) < 0) - return -EIO; - - return 0; -} - -/* - * Registers keypad device with input subsystem - * and configures TWL4030 keypad registers - */ -static int __devinit twl4030_kp_probe(struct platform_device *pdev) -{ - struct twl4030_keypad_data *pdata = pdev->dev.platform_data; - const struct matrix_keymap_data *keymap_data; - struct twl4030_keypad *kp; - struct input_dev *input; - u8 reg; - int error; - - if (!pdata || !pdata->rows || !pdata->cols || !pdata->keymap_data || - pdata->rows > TWL4030_MAX_ROWS || pdata->cols > TWL4030_MAX_COLS) { - dev_err(&pdev->dev, "Invalid platform_data\n"); - return -EINVAL; - } - - keymap_data = pdata->keymap_data; - - kp = kzalloc(sizeof(*kp), GFP_KERNEL); - input = input_allocate_device(); - if (!kp || !input) { - error = -ENOMEM; - goto err1; - } - - /* Get the debug Device */ - kp->dbg_dev = &pdev->dev; - kp->input = input; - - kp->n_rows = pdata->rows; - kp->n_cols = pdata->cols; - kp->irq = platform_get_irq(pdev, 0); - - /* setup input device */ - __set_bit(EV_KEY, input->evbit); - - /* Enable auto repeat feature of Linux input subsystem */ - if (pdata->rep) - __set_bit(EV_REP, input->evbit); - - input_set_capability(input, EV_MSC, MSC_SCAN); - - input->name = "TWL4030 Keypad"; - input->phys = "twl4030_keypad/input0"; - input->dev.parent = &pdev->dev; - - input->id.bustype = BUS_HOST; - input->id.vendor = 0x0001; - input->id.product = 0x0001; - input->id.version = 0x0003; - - input->keycode = kp->keymap; - input->keycodesize = sizeof(kp->keymap[0]); - input->keycodemax = ARRAY_SIZE(kp->keymap); - - matrix_keypad_build_keymap(keymap_data, TWL4030_ROW_SHIFT, - input->keycode, input->keybit); - - error = input_register_device(input); - if (error) { - dev_err(kp->dbg_dev, - "Unable to register twl4030 keypad device\n"); - goto err1; - } - - error = twl4030_kp_program(kp); - if (error) - goto err2; - - /* - * This ISR will always execute in kernel thread context because of - * the need to access the TWL4030 over the I2C bus. - * - * NOTE: we assume this host is wired to TWL4040 INT1, not INT2 ... - */ - error = request_threaded_irq(kp->irq, NULL, do_kp_irq, - 0, pdev->name, kp); - if (error) { - dev_info(kp->dbg_dev, "request_irq failed for irq no=%d\n", - kp->irq); - goto err2; - } - - /* Enable KP and TO interrupts now. */ - reg = (u8) ~(KEYP_IMR1_KP | KEYP_IMR1_TO); - if (twl4030_kpwrite_u8(kp, reg, KEYP_IMR1)) { - error = -EIO; - goto err3; - } - - platform_set_drvdata(pdev, kp); - return 0; - -err3: - /* mask all events - we don't care about the result */ - (void) twl4030_kpwrite_u8(kp, 0xff, KEYP_IMR1); - free_irq(kp->irq, NULL); -err2: - input_unregister_device(input); - input = NULL; -err1: - input_free_device(input); - kfree(kp); - return error; -} - -static int __devexit twl4030_kp_remove(struct platform_device *pdev) -{ - struct twl4030_keypad *kp = platform_get_drvdata(pdev); - - free_irq(kp->irq, kp); - input_unregister_device(kp->input); - platform_set_drvdata(pdev, NULL); - kfree(kp); - - return 0; -} - -/* - * NOTE: twl4030 are multi-function devices connected via I2C. - * So this device is a child of an I2C parent, thus it needs to - * support unplug/replug (which most platform devices don't). - */ - -static struct platform_driver twl4030_kp_driver = { - .probe = twl4030_kp_probe, - .remove = __devexit_p(twl4030_kp_remove), - .driver = { - .name = "twl4030_keypad", - .owner = THIS_MODULE, - }, -}; -module_platform_driver(twl4030_kp_driver); - -MODULE_AUTHOR("Texas Instruments"); -MODULE_DESCRIPTION("TWL4030 Keypad Driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:twl4030_keypad"); |