This patch adds support for tnetv107x's on-chip keypad controller.
Signed-off-by: Cyril Chemparathy <cyril@xxxxxx>
---
drivers/input/keyboard/Kconfig | 9 +
drivers/input/keyboard/Makefile | 1 +
drivers/input/keyboard/tnetv107x-keypad.c | 324 +++++++++++++++++++++++++++++
3 files changed, 334 insertions(+), 0 deletions(-)
create mode 100644 drivers/input/keyboard/tnetv107x-keypad.c
diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
index 9cc488d..0ea8648 100644
--- a/drivers/input/keyboard/Kconfig
+++ b/drivers/input/keyboard/Kconfig
@@ -457,4 +457,13 @@ config KEYBOARD_W90P910
To compile this driver as a module, choose M here: the
module will be called w90p910_keypad.
+config KEYBOARD_TNETV107X
+ tristate "TI TNETV107X keypad support"
+ depends on ARCH_DAVINCI_TNETV107X
+ help
+ Say Y here if you want to use the TNETV107X keypad.
+
+ To compile this driver as a module, choose M here: the
+ module will be called tnetv107x-keypad.
+
endif
diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile
index 504b591..63261b0 100644
--- a/drivers/input/keyboard/Makefile
+++ b/drivers/input/keyboard/Makefile
@@ -41,3 +41,4 @@ obj-$(CONFIG_KEYBOARD_SUNKBD) += sunkbd.o
obj-$(CONFIG_KEYBOARD_TWL4030) += twl4030_keypad.o
obj-$(CONFIG_KEYBOARD_XTKBD) += xtkbd.o
obj-$(CONFIG_KEYBOARD_W90P910) += w90p910_keypad.o
+obj-$(CONFIG_KEYBOARD_TNETV107X) += tnetv107x-keypad.o
diff --git a/drivers/input/keyboard/tnetv107x-keypad.c b/drivers/input/keyboard/tnetv107x-keypad.c
new file mode 100644
index 0000000..5039164
--- /dev/null
+++ b/drivers/input/keyboard/tnetv107x-keypad.c
@@ -0,0 +1,324 @@
+/*
+ * Texas Instruments TNETV107X Keypad Driver
+ *
+ * Copyright (C) 2010 Texas Instruments
+ *
+ * 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 version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/input.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/clk.h>
+
+#include <mach/tnetv107x.h>
+
+#define KEYPAD_ROWS 9
+#define KEYPAD_COLS 9
+
+struct keypad_regs {
+ u32 rev;
+ u32 mode;
+ u32 mask;
+ u32 pol;
+ u32 dclock;
+ u32 rclock;
+ u32 stable_cnt;
+ u32 in_en;
+ u32 out;
+ u32 out_en;
+ u32 in;
+ u32 lock;
+ u32 pres[3];
+};
+
+#define keypad_read(kp, reg) __raw_readl(&(kp)->regs->reg)
+#define keypad_write(kp, reg, val) __raw_writel(val, &(kp)->regs->reg)
+
+struct keypad_data {
+ struct tnetv107x_keypad_data data;
+ struct input_dev *input_dev;
+ struct resource *res;
+ struct keypad_regs __iomem *regs;
+ struct clk *clk;
+ struct device *dev;
+ u32 irq_press;
+ u32 irq_release;
+ u32 curr_keys[3];
+ u32 prev_keys[3];
+};
+
+static void handle_change(struct keypad_data *kp)
+{
+ int bit, i;
+
+ for (bit = 0; bit < (KEYPAD_ROWS * KEYPAD_COLS); bit++) {
+ int idx = bit / 32;
+ u32 mask = 1 << (bit % 32);
+ u32 curr = kp->curr_keys[idx] & mask;
+ u32 prev = kp->prev_keys[idx] & mask;
+ int row = bit / KEYPAD_COLS;
+ int col = bit % KEYPAD_COLS;
+ int ofs = row * kp->data.cols + col;
+
+ if (col >= kp->data.cols || row >= kp->data.rows)
+ continue;
+
+ if (curr && !prev) {
+ /* Report key press */
+ if (kp->data.keynames && kp->data.keynames[ofs])
+ dev_dbg(kp->dev, "%s (%d) pressed\n",
+ kp->data.keynames[ofs], ofs);
+ input_report_key(kp->input_dev,
+ kp->data.keymap[ofs], 1);
+ } else if (!curr && prev) {
+ /* Report key release */
+ if (kp->data.keynames && kp->data.keynames[ofs])
+ dev_dbg(kp->dev, "%s (%d) released\n",
+ kp->data.keynames[ofs], ofs);
+ input_report_key(kp->input_dev,
+ kp->data.keymap[ofs], 0);
+ }
+ }
+
+ /* Update shadow copy */
+ for (i = 0; i < 3; i++)
+ kp->prev_keys[i] = kp->curr_keys[i];
+
+ input_sync(kp->input_dev);
+}
+
+static irqreturn_t keypad_irq_press(int irq, void *data)
+{
+ struct keypad_data *kp = (struct keypad_data *)data;
+ int i;
+
+ for (i = 0; i < 3; i++)
+ kp->curr_keys[i] = keypad_read(kp, pres[i]);
+ handle_change(kp);
+ keypad_write(kp, lock, 0); /* Allow hardware updates */
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t keypad_irq_release(int irq, void *data)
+{
+ struct keypad_data *kp = (struct keypad_data *)data;
+ int i;
+
+ /* Hardware says all keys have been released */
+ for (i = 0; i < 3; i++)
+ kp->curr_keys[i] = 0;
+ handle_change(kp);
+ return IRQ_HANDLED;
+}
+
+static int tnetv107x_keypad_probe(struct platform_device *pdev)
+{
+ struct tnetv107x_keypad_data *pdata = pdev->dev.platform_data;
+ struct device *dev = &pdev->dev;
+ struct keypad_data *kp;
+ int i, ret = 0;
+ u32 rev = 0;
+
+ ret = -EINVAL;
+ if (!pdata) {
+ dev_err(dev, "cannot find device data\n");
+ return ret;
+ }
+
+ ret = -ENOMEM;
+ kp = kzalloc(sizeof(struct keypad_data), GFP_KERNEL);
+ if (!kp) {
+ dev_err(dev, "cannot allocate device info\n");
+ return ret;
+ }
+
+ dev_set_drvdata(dev, kp);
+ kp->data = *pdata;
+ kp->dev = dev;
+
+ ret = -ENOMEM;
+ kp->input_dev = input_allocate_device();
+ if (!kp->input_dev) {
+ dev_err(dev, "cannot allocate input device\n");
+ goto error0;
+ }
+
+ ret = -ENODEV;
+ kp->irq_press = platform_get_irq_byname(pdev, "press");
+ kp->irq_release = platform_get_irq_byname(pdev, "release");
+ if (kp->irq_press < 0 || kp->irq_release < 0) {
+ dev_err(dev, "cannot determine device interrupts\n");
+ goto error1;
+ }
+
+ ret = -ENODEV;
+ kp->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!kp->res) {
+ dev_err(dev, "cannot determine register area\n");
+ goto error1;
+ }
+
+ ret = -EINVAL;
+ if (!request_mem_region(kp->res->start, resource_size(kp->res),
+ pdev->name)) {
+ dev_err(dev, "cannot claim register memory\n");
+ goto error1;
+ }
+
+ ret = -ENOMEM;
+ kp->regs = ioremap(kp->res->start, resource_size(kp->res));
+ if (!kp->regs) {
+ dev_err(dev, "cannot map register memory\n");
+ goto error2;
+ }
+
+ ret = -EINVAL;
+ kp->clk = clk_get(dev, NULL);
+ if (!kp->clk) {
+ dev_err(dev, "cannot claim device clock\n");
+ goto error3;
+ }
+ clk_enable(kp->clk);
+
+ /* Initialize device registers */
+ keypad_write(kp, mode, 0);
+ keypad_write(kp, mask, ~((((1 << kp->data.rows)-1) << 9) |
+ (((1 << kp->data.cols)-1))));
+ keypad_write(kp, pol, 0x3ffff);
+ keypad_write(kp, dclock, kp->data.debounce);
+ keypad_write(kp, rclock, 4*kp->data.debounce);
+ keypad_write(kp, stable_cnt, kp->data.stable);
+
+ /* Enable Input */
+ keypad_write(kp, in_en, 0);
+ mdelay(1);
+ keypad_write(kp, in_en, 1);
+
+ ret = request_irq(kp->irq_press, keypad_irq_press, 0,
+ "keypad-press", kp);
+ if (ret < 0) {
+ dev_err(dev, "Could not allocate keypad press key irq\n");
+ goto error4;
+ }
+
+ ret = request_irq(kp->irq_release, keypad_irq_release, 0,
+ "keypad-release", kp);
+ if (ret < 0) {
+ dev_err(dev, "Could not allocate keypad release key irq\n");
+ goto error5;
+ }
+
+ set_bit(EV_KEY, kp->input_dev->evbit);
+ for (i = 0; i < kp->data.keymap_size; i++)
+ set_bit(kp->data.keymap[i] & KEY_MAX, kp->input_dev->keybit);
+
+ kp->input_dev->name = "tnetv107x-keypad";
+ kp->input_dev->phys = "tnetv107x-keypad/input0";
+ kp->input_dev->dev.parent = &pdev->dev;
+ kp->input_dev->id.bustype = BUS_HOST;
+ kp->input_dev->id.vendor = 0x0001;
+
+ rev = keypad_read(kp, rev);
+ kp->input_dev->id.product = ((rev >> 8) & 0x07);
+ kp->input_dev->id.version = ((rev >> 16) & 0xfff);
+
+ kp->input_dev->keycode = kp->data.keymap;
+ kp->input_dev->keycodesize = sizeof(int);
+ kp->input_dev->keycodemax = kp->data.keymap_size;
+ ret = input_register_device(kp->input_dev);
+ if (ret < 0) {
+ dev_err(dev, "Could not register input device\n");
+ goto error6;
+ }
+
+ dev_info(dev, "registered keypad device\n");
+ return 0;
+
+error6:
+ free_irq(kp->irq_release, kp);
+error5:
+ free_irq(kp->irq_press, kp);
+error4:
+ clk_disable(kp->clk);
+ clk_put(kp->clk);
+error3:
+ iounmap(kp->regs);
+error2:
+ release_mem_region(kp->res->start, resource_size(kp->res));
+error1:
+ input_free_device(kp->input_dev);
+error0:
+ platform_set_drvdata(pdev, NULL);
+ kfree(kp);
+ return ret;
+}
+
+static int tnetv107x_keypad_remove(struct platform_device *pdev)
+{
+ struct keypad_data *kp = dev_get_drvdata(&pdev->dev);
+
+ if (kp) {
+ input_unregister_device(kp->input_dev);
+ free_irq(kp->irq_release, kp);
+ free_irq(kp->irq_press, kp);
+ clk_disable(kp->clk);
+ clk_put(kp->clk);
+ iounmap(kp->regs);
+ release_mem_region(kp->res->start, resource_size(kp->res));
+ input_free_device(kp->input_dev);
+ platform_set_drvdata(pdev, NULL);
+ kfree(kp);
+ }
+ return 0;
+}
+
+static int tnetv107x_keypad_suspend(struct platform_device *pdev,
+ pm_message_t state)
+{
+ /* Nothing yet */
+ return 0;
+}
+
+static int tnetv107x_keypad_resume(struct platform_device *pdev)
+{
+ /* Nothing yet */
+ return 0;
+}
+
+static struct platform_driver tnetv107x_keypad_driver = {
+ .probe = tnetv107x_keypad_probe,
+ .remove = tnetv107x_keypad_remove,
+ .suspend = tnetv107x_keypad_suspend,
+ .resume = tnetv107x_keypad_resume,
+ .driver.name = "tnetv107x-keypad",
+};
+
+static int __init tnetv107x_keypad_init(void)
+{
+ return platform_driver_register(&tnetv107x_keypad_driver);
+}
+
+static void __exit tnetv107x_keypad_exit(void)
+{
+ platform_driver_unregister(&tnetv107x_keypad_driver);
+}
+
+module_init(tnetv107x_keypad_init);
+module_exit(tnetv107x_keypad_exit);
+
+MODULE_AUTHOR("Cyril Chemparathy");
+MODULE_DESCRIPTION("TNETV107X Keypad Driver");
+MODULE_LICENSE("GPL");
--
1.7.0.4
--
To unsubscribe from this list: send the line "unsubscribe linux-input" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
