This adds support for the TC35893 keypad controller
as a MFD client to the TC3589x driver
Signed-off-by: Sundar Iyer <sundar.iyer@xxxxxxxxxxxxxx>
---
drivers/input/keyboard/Kconfig | 19 ++
drivers/input/keyboard/Makefile | 1 +
drivers/input/keyboard/tc3589x-keypad.c | 498 +++++++++++++++++++++++++++++++
3 files changed, 518 insertions(+), 0 deletions(-)
create mode 100755 drivers/input/keyboard/tc3589x-keypad.c
diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
index b8c51b9..01326fd 100644
--- a/drivers/input/keyboard/Kconfig
+++ b/drivers/input/keyboard/Kconfig
@@ -443,6 +443,25 @@ config KEYBOARD_OMAP4
To compile this driver as a module, choose M here: the
module will be called omap4-keypad.
To compile this driver as a module, choose M here: the
module will be called spear-keboard.
+
+config KEYBOARD_TC3589X
+ tristate "TC3589X Keypad support"
+ depends on MFD_TC3589X
+ help
+ Say Y here if you want to use the keypad controller on
+ TC35892/3 I/O expander
+
+ To compile this driver as a module, choose M here: the
+ module will be called tc3589x-keypad
+
config KEYBOARD_TNETV107X
tristate "TI TNETV107X keypad support"
depends on ARCH_DAVINCI_TNETV107X
diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile
index a34452e..4411c70 100644
--- a/drivers/input/keyboard/Makefile
+++ b/drivers/input/keyboard/Makefile
@@ -40,6 +40,7 @@ obj-$(CONFIG_KEYBOARD_SH_KEYSC) += sh_keysc.o
obj-$(CONFIG_KEYBOARD_STMPE) += stmpe-keypad.o
obj-$(CONFIG_KEYBOARD_STOWAWAY) += stowaway.o
obj-$(CONFIG_KEYBOARD_SUNKBD) += sunkbd.o
+obj-$(CONFIG_KEYBOARD_TC3589X) += tc3589x-keypad.o
obj-$(CONFIG_KEYBOARD_TNETV107X) += tnetv107x-keypad.o
obj-$(CONFIG_KEYBOARD_TWL4030) += twl4030_keypad.o
obj-$(CONFIG_KEYBOARD_XTKBD) += xtkbd.o
diff --git a/drivers/input/keyboard/tc3589x-keypad.c b/drivers/input/keyboard/tc3589x-keypad.c
new file mode 100755
index 0000000..fb1a2f2
--- /dev/null
+++ b/drivers/input/keyboard/tc3589x-keypad.c
@@ -0,0 +1,498 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * Author: Jayeeta Banerjee <jayeeta.banerjee@xxxxxxxxxxxxxx>
+ * Author: Sundar Iyer <sundar.iyer@xxxxxxxxxxxxxx>
+ *
+ * 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/spinlock.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
+ * @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
+ * @enable: bool to enable/disable keypad operation
+ */
+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 enable;
+};
+
+static int __devinit 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_set_bits(tc3589x, TC3589x_KBDSIZE, 0x0,
+ (rows << KP_ROW_SHIFT) | column);
+ if (ret < 0)
+ return ret;
+
+ /* configure dedicated key config, no dedicated key selected */
+ ret = tc3589x_set_bits(tc3589x, TC3589x_KBCFG_LSB,
+ 0x0, DEDICATED_KEY_VAL);
+ if (ret < 0)
+ return ret;
+
+ ret = tc3589x_set_bits(tc3589x, TC3589x_KBCFG_MSB,
+ 0x0, DEDICATED_KEY_VAL);
+ if (ret < 0)
+ return ret;
+
+ /* Configure settle time */
+ ret = tc3589x_set_bits(tc3589x, TC3589x_KBDSETTLE_REG,
+ 0x0, settle_time);
+ if (ret < 0)
+ return ret;
+
+ /* Configure debounce time */
+ ret = tc3589x_set_bits(tc3589x, TC3589x_KBDBOUNCE, 0x0, 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_set_bits(tc3589x, TC3589x_IOPULLCFG0_LSB, 0x0,
+ TC3589x_PULLUP_ALL_MASK);
+ if (ret < 0)
+ return ret;
+
+ ret = tc3589x_set_bits(tc3589x, TC3589x_IOPULLCFG0_MSB, 0x0,
+ TC3589x_PULLUP_ALL_MASK);
+ if (ret < 0)
+ return ret;
+
+ /* Configure pull-up resistors for all column GPIOs */
+ ret = tc3589x_set_bits(tc3589x, TC3589x_IOPULLCFG1_LSB, 0x0,
+ TC3589x_PULLUP_ALL_MASK);
+ if (ret < 0)
+ return ret;
+
+ ret = tc3589x_set_bits(tc3589x, TC3589x_IOPULLCFG1_MSB, 0x0,
+ TC3589x_PULLUP_ALL_MASK);
+ if (ret < 0)
+ return ret;
+
+ ret = tc3589x_set_bits(tc3589x, TC3589x_IOPULLCFG2_LSB, 0x0,
+ TC3589x_PULLUP_ALL_MASK);
+
+ return ret;
+}
+
+#define TC35893_DATA_REGS 4
+#define TC35893_KEYCODE_FIFO_EMPTY 0x7f
+#define TC35893_KEYCODE_FIFO_CLEAR 0xff
+
+static irqreturn_t tc3589x_keypad_irq(int irq, void *dev)
+{
+ struct tc_keypad *keypad = (struct tc_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, 0x3);
+ 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 __devinit tc3589x_keypad_enable(struct tc3589x *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);
+
+ return ret;
+}
+
+static int __devexit tc3589x_keypad_disable(struct tc3589x *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);
+
+ return ret;
+}
+
+static ssize_t keypad_show_attr_enable(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct tc_keypad *keypad = platform_get_drvdata(pdev);
+
+ return sprintf(buf, "%u\n", keypad->enable);
+}
+
+static ssize_t keypad_store_attr_enable(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct tc_keypad *keypad = platform_get_drvdata(pdev);
+ struct tc3589x *tc3589x = keypad->tc3589x;
+ unsigned long state;
+
+ if (sscanf(buf, "%lu", &state) != 1)
+ return -EINVAL;
+
+ if ((state != 1) && (state != 0))
+ return -EINVAL;
+
+ if (state != keypad->enable) {
+ if (state)
+ tc3589x_keypad_enable(tc3589x);
+ else
+ tc3589x_keypad_disable(tc3589x);
+ keypad->enable = state;
+ }
+
+ return strnlen(buf, count);
+}
+
+static DEVICE_ATTR(enable, S_IWUSR | S_IRUGO,
+ keypad_show_attr_enable, keypad_store_attr_enable);
+
+static struct attribute *tc3589x_keypad_attrs[] = {
+ &dev_attr_enable.attr,
+ NULL,
+};
+
+static struct attribute_group tc3589x_attr_group = {
+ .attrs = tc3589x_keypad_attrs,
+};
+
+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;
+
+ /* enable the keypad module */
+ error = tc3589x_keypad_enable(tc3589x);
+ if (error < 0) {
+ dev_err(&pdev->dev, "failed to enable keypad module\n");
+ goto err_free_mem;
+ }
+
+ error = tc3589x_keypad_init_key_hardware(keypad);
+ if (error < 0) {
+ dev_err(&pdev->dev, "failed to configure keypad module\n");
+ goto err_free_mem;
+ }
+
+ input->id.bustype = BUS_HOST;
+ 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_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",
+ plat->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;
+ }
+
+ device_init_wakeup(&pdev->dev, plat->enable_wakeup);
+ device_set_wakeup_capable(&pdev->dev, plat->enable_wakeup);
+
+ /* sysfs implementation for dynamic enable/disable the input event */
+ error = sysfs_create_group(&pdev->dev.kobj, &tc3589x_attr_group);
+ if (error) {
+ dev_err(&pdev->dev, "Could not register sysfs entries\n");
+ goto err_free_irq;
+ }
+
+ keypad->enable = true;
+ platform_set_drvdata(pdev, keypad);
+
+ return 0;
+
+err_free_irq:
+ free_irq(plat->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);
+ struct tc3589x *tc3589x = keypad->tc3589x;
+
+ free_irq(keypad->board->irq, keypad);
+
+ sysfs_remove_group(&pdev->dev.kobj, &tc3589x_attr_group);
+
+ input_unregister_device(keypad->input);
+
+ tc3589x_keypad_disable(tc3589x);
+
+ kfree(keypad);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int tc3589x_keypad_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct tc_keypad *keypad = platform_get_drvdata(pdev);
+ struct tc3589x *tc3589x = keypad->tc3589x;
+ int irq = keypad->board->irq;
+
+ /* disable the IRQ */
+ if (!device_may_wakeup(&pdev->dev))
+ tc3589x_keypad_disable(tc3589x);
+ 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);
+ struct tc3589x *tc3589x = keypad->tc3589x;
+ int irq = keypad->board->irq;
+
+ /* enable the IRQ */
+ if (!device_may_wakeup(&pdev->dev))
+ tc3589x_keypad_enable(tc3589x);
+ else
+ disable_irq_wake(irq);
+
+ return 0;
+}
+
+static const struct dev_pm_ops tc3589x_keypad_dev_pm_ops = {
+ .suspend = tc3589x_keypad_suspend,
+ .resume = tc3589x_keypad_resume,
+};
+#endif
+
+static struct platform_driver tc3589x_keypad_driver = {
+ .driver.name = "tc3589x-keypad",
+ .driver.owner = THIS_MODULE,
+#ifdef CONFIG_PM
+ .driver.pm = &tc3589x_keypad_dev_pm_ops,
+#endif
+ .probe = tc3589x_keypad_probe,
+ .remove = __devexit_p(tc3589x_keypad_remove),
+};
+
+static int __init tc3589x_keypad_init(void)
+{
+ return platform_driver_register(&tc3589x_keypad_driver);
+}
+
+static void __exit tc3589x_keypad_exit(void)
+{
+ return platform_driver_unregister(&tc3589x_keypad_driver);
+}
+
+module_init(tc3589x_keypad_init);
+module_exit(tc3589x_keypad_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Jayeeta Banerjee/Sundar Iyer");
+MODULE_DESCRIPTION("TC35893 Keypad Driver");
+
--
1.7.2.dirty
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