diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/input/keyboard/tc3589x-keypad.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/input/keyboard/tc3589x-keypad.c | 463 |
1 files changed, 0 insertions, 463 deletions
diff --git a/ANDROID_3.4.5/drivers/input/keyboard/tc3589x-keypad.c b/ANDROID_3.4.5/drivers/input/keyboard/tc3589x-keypad.c deleted file mode 100644 index 2dee3e4e..00000000 --- a/ANDROID_3.4.5/drivers/input/keyboard/tc3589x-keypad.c +++ /dev/null @@ -1,463 +0,0 @@ -/* - * Copyright (C) ST-Ericsson SA 2010 - * - * Author: Jayeeta Banerjee <jayeeta.banerjee@stericsson.com> - * Author: Sundar Iyer <sundar.iyer@stericsson.com> - * - * License Terms: GNU General Public License, version 2 - * - * TC35893 MFD Keypad Controller driver - */ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/input.h> -#include <linux/platform_device.h> -#include <linux/input/matrix_keypad.h> -#include <linux/i2c.h> -#include <linux/slab.h> -#include <linux/mfd/tc3589x.h> - -/* Maximum supported keypad matrix row/columns size */ -#define TC3589x_MAX_KPROW 8 -#define TC3589x_MAX_KPCOL 12 - -/* keypad related Constants */ -#define TC3589x_MAX_DEBOUNCE_SETTLE 0xFF -#define DEDICATED_KEY_VAL 0xFF - -/* Pull up/down masks */ -#define TC3589x_NO_PULL_MASK 0x0 -#define TC3589x_PULL_DOWN_MASK 0x1 -#define TC3589x_PULL_UP_MASK 0x2 -#define TC3589x_PULLUP_ALL_MASK 0xAA -#define TC3589x_IO_PULL_VAL(index, mask) ((mask)<<((index)%4)*2)) - -/* Bit masks for IOCFG register */ -#define IOCFG_BALLCFG 0x01 -#define IOCFG_IG 0x08 - -#define KP_EVCODE_COL_MASK 0x0F -#define KP_EVCODE_ROW_MASK 0x70 -#define KP_RELEASE_EVT_MASK 0x80 - -#define KP_ROW_SHIFT 4 - -#define KP_NO_VALID_KEY_MASK 0x7F - -/* bit masks for RESTCTRL register */ -#define TC3589x_KBDRST 0x2 -#define TC3589x_IRQRST 0x10 -#define TC3589x_RESET_ALL 0x1B - -/* KBDMFS register bit mask */ -#define TC3589x_KBDMFS_EN 0x1 - -/* CLKEN register bitmask */ -#define KPD_CLK_EN 0x1 - -/* RSTINTCLR register bit mask */ -#define IRQ_CLEAR 0x1 - -/* bit masks for keyboard interrupts*/ -#define TC3589x_EVT_LOSS_INT 0x8 -#define TC3589x_EVT_INT 0x4 -#define TC3589x_KBD_LOSS_INT 0x2 -#define TC3589x_KBD_INT 0x1 - -/* bit masks for keyboard interrupt clear*/ -#define TC3589x_EVT_INT_CLR 0x2 -#define TC3589x_KBD_INT_CLR 0x1 - -#define TC3589x_KBD_KEYMAP_SIZE 64 - -/** - * struct tc_keypad - data structure used by keypad driver - * @tc3589x: pointer to tc35893 - * @input: pointer to input device object - * @board: keypad platform device - * @krow: number of rows - * @kcol: number of coloumns - * @keymap: matrix scan code table for keycodes - * @keypad_stopped: holds keypad status - */ -struct tc_keypad { - struct tc3589x *tc3589x; - struct input_dev *input; - const struct tc3589x_keypad_platform_data *board; - unsigned int krow; - unsigned int kcol; - unsigned short keymap[TC3589x_KBD_KEYMAP_SIZE]; - bool keypad_stopped; -}; - -static int tc3589x_keypad_init_key_hardware(struct tc_keypad *keypad) -{ - int ret; - struct tc3589x *tc3589x = keypad->tc3589x; - u8 settle_time = keypad->board->settle_time; - u8 dbounce_period = keypad->board->debounce_period; - u8 rows = keypad->board->krow & 0xf; /* mask out the nibble */ - u8 column = keypad->board->kcol & 0xf; /* mask out the nibble */ - - /* validate platform configurations */ - if (keypad->board->kcol > TC3589x_MAX_KPCOL || - keypad->board->krow > TC3589x_MAX_KPROW || - keypad->board->debounce_period > TC3589x_MAX_DEBOUNCE_SETTLE || - keypad->board->settle_time > TC3589x_MAX_DEBOUNCE_SETTLE) - return -EINVAL; - - /* configure KBDSIZE 4 LSbits for cols and 4 MSbits for rows */ - ret = tc3589x_reg_write(tc3589x, TC3589x_KBDSIZE, - (rows << KP_ROW_SHIFT) | column); - if (ret < 0) - return ret; - - /* configure dedicated key config, no dedicated key selected */ - ret = tc3589x_reg_write(tc3589x, TC3589x_KBCFG_LSB, DEDICATED_KEY_VAL); - if (ret < 0) - return ret; - - ret = tc3589x_reg_write(tc3589x, TC3589x_KBCFG_MSB, DEDICATED_KEY_VAL); - if (ret < 0) - return ret; - - /* Configure settle time */ - ret = tc3589x_reg_write(tc3589x, TC3589x_KBDSETTLE_REG, settle_time); - if (ret < 0) - return ret; - - /* Configure debounce time */ - ret = tc3589x_reg_write(tc3589x, TC3589x_KBDBOUNCE, dbounce_period); - if (ret < 0) - return ret; - - /* Start of initialise keypad GPIOs */ - ret = tc3589x_set_bits(tc3589x, TC3589x_IOCFG, 0x0, IOCFG_IG); - if (ret < 0) - return ret; - - /* Configure pull-up resistors for all row GPIOs */ - ret = tc3589x_reg_write(tc3589x, TC3589x_IOPULLCFG0_LSB, - TC3589x_PULLUP_ALL_MASK); - if (ret < 0) - return ret; - - ret = tc3589x_reg_write(tc3589x, TC3589x_IOPULLCFG0_MSB, - TC3589x_PULLUP_ALL_MASK); - if (ret < 0) - return ret; - - /* Configure pull-up resistors for all column GPIOs */ - ret = tc3589x_reg_write(tc3589x, TC3589x_IOPULLCFG1_LSB, - TC3589x_PULLUP_ALL_MASK); - if (ret < 0) - return ret; - - ret = tc3589x_reg_write(tc3589x, TC3589x_IOPULLCFG1_MSB, - TC3589x_PULLUP_ALL_MASK); - if (ret < 0) - return ret; - - ret = tc3589x_reg_write(tc3589x, TC3589x_IOPULLCFG2_LSB, - TC3589x_PULLUP_ALL_MASK); - - return ret; -} - -#define TC35893_DATA_REGS 4 -#define TC35893_KEYCODE_FIFO_EMPTY 0x7f -#define TC35893_KEYCODE_FIFO_CLEAR 0xff -#define TC35893_KEYPAD_ROW_SHIFT 0x3 - -static irqreturn_t tc3589x_keypad_irq(int irq, void *dev) -{ - struct tc_keypad *keypad = dev; - struct tc3589x *tc3589x = keypad->tc3589x; - u8 i, row_index, col_index, kbd_code, up; - u8 code; - - for (i = 0; i < TC35893_DATA_REGS * 2; i++) { - kbd_code = tc3589x_reg_read(tc3589x, TC3589x_EVTCODE_FIFO); - - /* loop till fifo is empty and no more keys are pressed */ - if (kbd_code == TC35893_KEYCODE_FIFO_EMPTY || - kbd_code == TC35893_KEYCODE_FIFO_CLEAR) - continue; - - /* valid key is found */ - col_index = kbd_code & KP_EVCODE_COL_MASK; - row_index = (kbd_code & KP_EVCODE_ROW_MASK) >> KP_ROW_SHIFT; - code = MATRIX_SCAN_CODE(row_index, col_index, - TC35893_KEYPAD_ROW_SHIFT); - up = kbd_code & KP_RELEASE_EVT_MASK; - - input_event(keypad->input, EV_MSC, MSC_SCAN, code); - input_report_key(keypad->input, keypad->keymap[code], !up); - input_sync(keypad->input); - } - - /* clear IRQ */ - tc3589x_set_bits(tc3589x, TC3589x_KBDIC, - 0x0, TC3589x_EVT_INT_CLR | TC3589x_KBD_INT_CLR); - /* enable IRQ */ - tc3589x_set_bits(tc3589x, TC3589x_KBDMSK, - 0x0, TC3589x_EVT_LOSS_INT | TC3589x_EVT_INT); - - return IRQ_HANDLED; -} - -static int tc3589x_keypad_enable(struct tc_keypad *keypad) -{ - struct tc3589x *tc3589x = keypad->tc3589x; - int ret; - - /* pull the keypad module out of reset */ - ret = tc3589x_set_bits(tc3589x, TC3589x_RSTCTRL, TC3589x_KBDRST, 0x0); - if (ret < 0) - return ret; - - /* configure KBDMFS */ - ret = tc3589x_set_bits(tc3589x, TC3589x_KBDMFS, 0x0, TC3589x_KBDMFS_EN); - if (ret < 0) - return ret; - - /* enable the keypad clock */ - ret = tc3589x_set_bits(tc3589x, TC3589x_CLKEN, 0x0, KPD_CLK_EN); - if (ret < 0) - return ret; - - /* clear pending IRQs */ - ret = tc3589x_set_bits(tc3589x, TC3589x_RSTINTCLR, 0x0, 0x1); - if (ret < 0) - return ret; - - /* enable the IRQs */ - ret = tc3589x_set_bits(tc3589x, TC3589x_KBDMSK, 0x0, - TC3589x_EVT_LOSS_INT | TC3589x_EVT_INT); - if (ret < 0) - return ret; - - keypad->keypad_stopped = false; - - return ret; -} - -static int tc3589x_keypad_disable(struct tc_keypad *keypad) -{ - struct tc3589x *tc3589x = keypad->tc3589x; - int ret; - - /* clear IRQ */ - ret = tc3589x_set_bits(tc3589x, TC3589x_KBDIC, - 0x0, TC3589x_EVT_INT_CLR | TC3589x_KBD_INT_CLR); - if (ret < 0) - return ret; - - /* disable all interrupts */ - ret = tc3589x_set_bits(tc3589x, TC3589x_KBDMSK, - ~(TC3589x_EVT_LOSS_INT | TC3589x_EVT_INT), 0x0); - if (ret < 0) - return ret; - - /* disable the keypad module */ - ret = tc3589x_set_bits(tc3589x, TC3589x_CLKEN, 0x1, 0x0); - if (ret < 0) - return ret; - - /* put the keypad module into reset */ - ret = tc3589x_set_bits(tc3589x, TC3589x_RSTCTRL, TC3589x_KBDRST, 0x1); - - keypad->keypad_stopped = true; - - return ret; -} - -static int tc3589x_keypad_open(struct input_dev *input) -{ - int error; - struct tc_keypad *keypad = input_get_drvdata(input); - - /* enable the keypad module */ - error = tc3589x_keypad_enable(keypad); - if (error < 0) { - dev_err(&input->dev, "failed to enable keypad module\n"); - return error; - } - - error = tc3589x_keypad_init_key_hardware(keypad); - if (error < 0) { - dev_err(&input->dev, "failed to configure keypad module\n"); - return error; - } - - return 0; -} - -static void tc3589x_keypad_close(struct input_dev *input) -{ - struct tc_keypad *keypad = input_get_drvdata(input); - - /* disable the keypad module */ - tc3589x_keypad_disable(keypad); -} - -static int __devinit tc3589x_keypad_probe(struct platform_device *pdev) -{ - struct tc3589x *tc3589x = dev_get_drvdata(pdev->dev.parent); - struct tc_keypad *keypad; - struct input_dev *input; - const struct tc3589x_keypad_platform_data *plat; - int error, irq; - - plat = tc3589x->pdata->keypad; - if (!plat) { - dev_err(&pdev->dev, "invalid keypad platform data\n"); - return -EINVAL; - } - - irq = platform_get_irq(pdev, 0); - if (irq < 0) - return irq; - - keypad = kzalloc(sizeof(struct tc_keypad), GFP_KERNEL); - input = input_allocate_device(); - if (!keypad || !input) { - dev_err(&pdev->dev, "failed to allocate keypad memory\n"); - error = -ENOMEM; - goto err_free_mem; - } - - keypad->board = plat; - keypad->input = input; - keypad->tc3589x = tc3589x; - - input->id.bustype = BUS_I2C; - input->name = pdev->name; - input->dev.parent = &pdev->dev; - - input->keycode = keypad->keymap; - input->keycodesize = sizeof(keypad->keymap[0]); - input->keycodemax = ARRAY_SIZE(keypad->keymap); - - input->open = tc3589x_keypad_open; - input->close = tc3589x_keypad_close; - - input_set_drvdata(input, keypad); - - input_set_capability(input, EV_MSC, MSC_SCAN); - - __set_bit(EV_KEY, input->evbit); - if (!plat->no_autorepeat) - __set_bit(EV_REP, input->evbit); - - matrix_keypad_build_keymap(plat->keymap_data, 0x3, - input->keycode, input->keybit); - - error = request_threaded_irq(irq, NULL, - tc3589x_keypad_irq, plat->irqtype, - "tc3589x-keypad", keypad); - if (error < 0) { - dev_err(&pdev->dev, - "Could not allocate irq %d,error %d\n", - irq, error); - goto err_free_mem; - } - - error = input_register_device(input); - if (error) { - dev_err(&pdev->dev, "Could not register input device\n"); - goto err_free_irq; - } - - /* let platform decide if keypad is a wakeup source or not */ - device_init_wakeup(&pdev->dev, plat->enable_wakeup); - device_set_wakeup_capable(&pdev->dev, plat->enable_wakeup); - - platform_set_drvdata(pdev, keypad); - - return 0; - -err_free_irq: - free_irq(irq, keypad); -err_free_mem: - input_free_device(input); - kfree(keypad); - return error; -} - -static int __devexit tc3589x_keypad_remove(struct platform_device *pdev) -{ - struct tc_keypad *keypad = platform_get_drvdata(pdev); - int irq = platform_get_irq(pdev, 0); - - if (!keypad->keypad_stopped) - tc3589x_keypad_disable(keypad); - - free_irq(irq, keypad); - - input_unregister_device(keypad->input); - - kfree(keypad); - - return 0; -} - -#ifdef CONFIG_PM_SLEEP -static int tc3589x_keypad_suspend(struct device *dev) -{ - struct platform_device *pdev = to_platform_device(dev); - struct tc_keypad *keypad = platform_get_drvdata(pdev); - int irq = platform_get_irq(pdev, 0); - - /* keypad is already off; we do nothing */ - if (keypad->keypad_stopped) - return 0; - - /* if device is not a wakeup source, disable it for powersave */ - if (!device_may_wakeup(&pdev->dev)) - tc3589x_keypad_disable(keypad); - else - enable_irq_wake(irq); - - return 0; -} - -static int tc3589x_keypad_resume(struct device *dev) -{ - struct platform_device *pdev = to_platform_device(dev); - struct tc_keypad *keypad = platform_get_drvdata(pdev); - int irq = platform_get_irq(pdev, 0); - - if (!keypad->keypad_stopped) - return 0; - - /* enable the device to resume normal operations */ - if (!device_may_wakeup(&pdev->dev)) - tc3589x_keypad_enable(keypad); - else - disable_irq_wake(irq); - - return 0; -} -#endif - -static SIMPLE_DEV_PM_OPS(tc3589x_keypad_dev_pm_ops, - tc3589x_keypad_suspend, tc3589x_keypad_resume); - -static struct platform_driver tc3589x_keypad_driver = { - .driver = { - .name = "tc3589x-keypad", - .owner = THIS_MODULE, - .pm = &tc3589x_keypad_dev_pm_ops, - }, - .probe = tc3589x_keypad_probe, - .remove = __devexit_p(tc3589x_keypad_remove), -}; -module_platform_driver(tc3589x_keypad_driver); - -MODULE_LICENSE("GPL v2"); -MODULE_AUTHOR("Jayeeta Banerjee/Sundar Iyer"); -MODULE_DESCRIPTION("TC35893 Keypad Driver"); -MODULE_ALIAS("platform:tc3589x-keypad"); |