From: Miguel Aguilar <miguel.agui...@ridgerun.com>
Adds the driver for enabling keypad support on DM365 platform.
This driver was tested on DM365 EVM rev c.
Signed-off-by: Miguel Aguilar <miguel.agui...@ridgerun.com>
---
arch/arm/mach-davinci/include/mach/keypad.h | 44 ++++
drivers/input/keyboard/Kconfig | 6 +
drivers/input/keyboard/Makefile | 1 +
drivers/input/keyboard/davinci_dm365_keypad.c | 315 +++++++++++++++++++++++++
4 files changed, 366 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-davinci/include/mach/keypad.h
create mode 100644 drivers/input/keyboard/davinci_dm365_keypad.c
diff --git a/arch/arm/mach-davinci/include/mach/keypad.h
b/arch/arm/mach-davinci/include/mach/keypad.h
new file mode 100644
index 0000000..16f4419
--- /dev/null
+++ b/arch/arm/mach-davinci/include/mach/keypad.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2009 Texas Instruments, Inc
+ *
+ * Author: Miguel Aguilar <miguel.agui...@ridgerun.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 DAVINCI_KEYPAD_H
+#define DAVINCI_KEYPAD_H
+
+#include <linux/io.h>
+
+struct davinci_kp_platform_data {
+ int *keymap;
+ u32 keymapsize;
+ u32 rep:1;
+ u32 strobe;
+ u32 interval;
+};
+
+struct davinci_kp {
+ struct input_dev *input;
+ struct davinci_kp_platform_data *pdata;
+ int irq;
+ void __iomem *base;
+ resource_size_t pbase;
+ size_t base_size;
+};
+
+#endif
+
diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
index a6b989a..08ed7d4 100644
--- a/drivers/input/keyboard/Kconfig
+++ b/drivers/input/keyboard/Kconfig
@@ -361,4 +361,10 @@ config KEYBOARD_XTKBD
To compile this driver as a module, choose M here: the
module will be called xtkbd.
+config KEYBOARD_DAVINCI_DM365
+ tristate "TI DaVinci DM365 Keypad"
+ depends on ARCH_DAVINCI_DM365
+ help
+ Supports the keypad module on the DM365
+
endif
diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile
index b5b5eae..1921bac 100644
--- a/drivers/input/keyboard/Makefile
+++ b/drivers/input/keyboard/Makefile
@@ -31,3 +31,4 @@ obj-$(CONFIG_KEYBOARD_STOWAWAY) += stowaway.o
obj-$(CONFIG_KEYBOARD_SUNKBD) += sunkbd.o
obj-$(CONFIG_KEYBOARD_TOSA) += tosakbd.o
obj-$(CONFIG_KEYBOARD_XTKBD) += xtkbd.o
+obj-$(CONFIG_KEYBOARD_DAVINCI_DM365) += davinci_dm365_keypad.o
diff --git a/drivers/input/keyboard/davinci_dm365_keypad.c
b/drivers/input/keyboard/davinci_dm365_keypad.c
new file mode 100644
index 0000000..be52fae
--- /dev/null
+++ b/drivers/input/keyboard/davinci_dm365_keypad.c
@@ -0,0 +1,315 @@
+/*
+ * DaVinci DM365 Keypad Driver
+ *
+ * Copyright (C) 2009 Texas Instruments, Inc
+ *
+ * Author: Miguel Aguilar <miguel.agui...@ridgerun.com>
+ *
+ * Intial Code: Sandeep Paulraj <s-paul...@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/delay.h>
+#include <linux/platform_device.h>
+#include <linux/errno.h>
+#include <linux/mutex.h>
+#include <asm/irq.h>
+#include <mach/hardware.h>
+#include <mach/irqs.h>
+#include <mach/mux.h>
+#include <mach/keypad.h>
+
+/* Keypad registers */
+#define KEYPAD_BASE DM365_KEYSCAN_BASE
+#define DM365_KEYPAD_KEYCTRL (0x0000)
+#define DM365_KEYPAD_INTENA (0x0004)
+#define DM365_KEYPAD_INTFLAG (0x0008)
+#define DM365_KEYPAD_INTCLR (0x000c)
+#define DM365_KEYPAD_STRBWIDTH (0x0010)
+#define DM365_KEYPAD_INTERVAL (0x0014)
+#define DM365_KEYPAD_CONTTIME (0x0018)
+#define DM365_KEYPAD_CURRENTST (0x001c)
+#define DM365_KEYPAD_PREVSTATE (0x0020)
+#define DM365_KEYPAD_EMUCTRL (0x0024)
+#define DM365_KEYPAD_IODFTCTRL (0x002c)
+
+/* Key Control Register (KEYCTRL) */
+#define DM365_KEYPAD_KEYEN 0x00000001
+#define DM365_KEYPAD_PREVMODE 0x00000002
+#define DM365_KEYPAD_CHATOFF 0x00000004
+#define DM365_KEYPAD_AUTODET 0x00000008
+#define DM365_KEYPAD_SCANMODE 0x00000010
+#define DM365_KEYPAD_OUTTYPE 0x00000020
+#define DM365_KEYPAD_4X4 0x00000040
+
+/* Masks for the interrupts */
+#define DM365_KEYPAD_INT_CONT 0x00000008
+#define DM365_KEYPAD_INT_OFF 0x00000004
+#define DM365_KEYPAD_INT_ON 0x00000002
+#define DM365_KEYPAD_INT_CHANGE 0x00000001
+#define DM365_KEYPAD_INT_ALL 0x0000000f
+
+/* Debug flag */
+#undef DEBUG
+
+void dm365_kp_write(struct davinci_kp *dm365_kp, u32 val, u32 addr)
+{
+ u32 base = (u32)dm365_kp->base;
+
+ __raw_writel(val,(u32 *)(base + addr));
+}
+
+u32 dm365_kp_read(struct davinci_kp *dm365_kp, u32 addr)
+{
+ u32 base = (u32)dm365_kp->base;
+
+ return __raw_readl((u32 *)(base + addr));
+}
+
+/* Initializing the kp Module */
+void dm365_kp_initialize(struct davinci_kp *dm365_kp)
+{
+ u32 strobe = dm365_kp->pdata->strobe;
+ u32 interval = dm365_kp->pdata->interval;
+
+ /* Enable all interrupts */
+ dm365_kp_write(dm365_kp, DM365_KEYPAD_INT_ALL, DM365_KEYPAD_INTENA);
+
+ /* Clear interrupts if any */
+ dm365_kp_write(dm365_kp, DM365_KEYPAD_INT_ALL, DM365_KEYPAD_INTCLR);
+
+ /* Setup the scan period = strobe + interval */
+ dm365_kp_write(dm365_kp, strobe, DM365_KEYPAD_STRBWIDTH);
+ dm365_kp_write(dm365_kp, interval, DM365_KEYPAD_INTERVAL);
+ dm365_kp_write(dm365_kp, 0x01, DM365_KEYPAD_CONTTIME);
+
+ /* Enable Keyscan module and enable */
+ dm365_kp_write(dm365_kp, DM365_KEYPAD_AUTODET | DM365_KEYPAD_KEYEN,
+ DM365_KEYPAD_KEYCTRL);
+}
+
+static irqreturn_t dm365_kp_interrupt(int irq, void *dev_id)
+{
+ int i;
+ u32 prev_status, new_status, changed;
+ int keycode = KEY_UNKNOWN;
+ struct davinci_kp *dm365_kp = dev_id;
+ int *keymap = dm365_kp->pdata->keymap;
+ u32 keymapsize = dm365_kp->pdata->keymapsize;
+
+ /* Disable interrupt */
+ dm365_kp_write(dm365_kp, 0x0, DM365_KEYPAD_INTENA);
+
+ /* Reading previous and new status of the keypad */
+ prev_status = dm365_kp_read(dm365_kp, DM365_KEYPAD_PREVSTATE);
+ new_status = dm365_kp_read(dm365_kp, DM365_KEYPAD_CURRENTST);
+
+ changed = prev_status ^ new_status;
+
+ for (i = 0; i < keymapsize; i++) {
+ if ((changed >> i) & 0x1) {
+ keycode = keymap[i];
+ if((new_status >> i) & 0x1) {
+ /* Report release */
+ input_report_key(dm365_kp->input, keycode, 0);
+ input_sync(dm365_kp->input);
+#ifdef DEBUG
+ printk(KERN_INFO "dm365_keypad: key %d
released\n",
+ keycode);
+#endif
+ } else {
+ /* Report press */
+ input_report_key(dm365_kp->input, keycode, 1);
+ input_sync(dm365_kp->input);
+#ifdef DEBUG
+ printk(KERN_INFO "dm365_keypad: key %d
pressed\n",
+ keycode);
+#endif
+ }
+ }
+ }
+
+ /* Clearing interrupt */
+ dm365_kp_write(dm365_kp, DM365_KEYPAD_INT_ALL, DM365_KEYPAD_INTCLR);
+
+ /* Enable interrupts */
+ dm365_kp_write(dm365_kp, 0x1, DM365_KEYPAD_INTENA);
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * Registers keypad device with input sub system and configures
+ * DM365 keypad registers
+ */
+static int dm365_kp_probe(struct platform_device *pdev)
+{
+ struct davinci_kp *dm365_kp;
+ struct input_dev *key_dev;
+ struct resource *res, *mem;
+ int ret, i;
+ struct davinci_kp_platform_data *pdata = pdev->dev.platform_data;
+
+ if (!pdata->keymap) {
+ printk(KERN_ERR "No keymap from pdata\n");
+ return -EINVAL;
+ }
+
+ dm365_kp = kzalloc(sizeof *dm365_kp, GFP_KERNEL);
+ key_dev = input_allocate_device();
+
+ if (!dm365_kp || !key_dev) {
+ printk(KERN_ERR "Could not allocate input device\n");
+ return -EINVAL;
+ }
+
+ platform_set_drvdata(pdev, dm365_kp);
+
+ dm365_kp->input = key_dev;
+
+ dm365_kp->irq = platform_get_irq(pdev, 0);
+ if (dm365_kp->irq <= 0) {
+ pr_debug("%s: No DM365 Keypad irq\n", pdev->name);
+ goto fail1;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+ dm365_kp->pbase = res->start;
+ dm365_kp->base_size = res->end - res->start + 1;
+
+ if (res)
+ mem = request_mem_region(res->start,
+ dm365_kp->base_size, pdev->name);
+ else
+ mem = NULL;
+
+ if (!mem) {
+ pr_debug("%s: KEYSCAN registers at %08x are not free\n",
+ pdev->name, dm365_kp->pbase);
+ goto fail1;
+ }
+
+ dm365_kp->base = ioremap(res->start, dm365_kp->base_size);
+ if (dm365_kp->base == NULL) {
+ pr_debug("%s: Can't ioremap MEM resource.\n", pdev->name);
+ goto fail2;
+ }
+
+ /* Enable auto repeat feature of Linux input subsystem */
+ if (pdata->rep)
+ __set_bit(EV_REP, key_dev->evbit);
+
+ /* Setup input device */
+ __set_bit(EV_KEY, key_dev->evbit);
+
+ /* Setup the keymap */
+ dm365_kp->pdata = pdata;
+
+ for (i = 0; i < dm365_kp->pdata->keymapsize; i++)
+ __set_bit(dm365_kp->pdata->keymap[i], key_dev->keybit);
+
+ key_dev->name = "dm365_keypad";
+ key_dev->phys = "dm365_keypad/input0";
+ key_dev->dev.parent = &pdev->dev;
+ key_dev->id.bustype = BUS_HOST;
+ key_dev->id.vendor = 0x0001;
+ key_dev->id.product = 0x0365;
+ key_dev->id.version = 0x0001;
+ key_dev->keycode = dm365_kp->pdata->keymap;
+ key_dev->keycodesize = sizeof(unsigned int);
+ key_dev->keycodemax = dm365_kp->pdata->keymapsize;
+
+ ret = input_register_device(dm365_kp->input);
+ if (ret < 0) {
+ printk(KERN_ERR
+ "Unable to register DaVinci DM365 keypad device\n");
+ goto fail3;
+ }
+
+ ret = request_irq(dm365_kp->irq, dm365_kp_interrupt, IRQF_DISABLED,
+ "dm365_keypad", dm365_kp);
+ if (ret < 0) {
+ printk(KERN_ERR
+ "Unable to register DaVinci DM365 keypad Interrupt\n");
+ goto fail4;
+ }
+
+ dm365_kp_initialize(dm365_kp);
+
+ return 0;
+fail4:
+ input_unregister_device(dm365_kp->input);
+ key_dev = NULL;
+fail3:
+ iounmap(dm365_kp->base);
+fail2:
+ release_mem_region(dm365_kp->pbase, dm365_kp->base_size);
+fail1:
+ kfree(dm365_kp);
+ input_free_device(key_dev);
+
+ return -EINVAL;
+}
+
+static int __devexit dm365_kp_remove(struct platform_device *pdev)
+{
+ struct davinci_kp *dm365_kp = platform_get_drvdata(pdev);
+
+ input_unregister_device(dm365_kp->input);
+ free_irq(dm365_kp->irq, dm365_kp);
+ kfree(dm365_kp);
+
+ iounmap(dm365_kp->base);
+ release_mem_region(dm365_kp->pbase, dm365_kp->base_size);
+
+ platform_set_drvdata(pdev, NULL);
+
+ return 0;
+}
+
+static struct platform_driver dm365_kp_driver = {
+ .probe = dm365_kp_probe,
+ .remove = __devexit_p(dm365_kp_remove),
+ .driver = {
+ .name = "dm365_keypad",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init dm365_kp_init(void)
+{
+ printk(KERN_INFO "DaVinci DM365 Keypad Driver\n");
+
+ return platform_driver_register(&dm365_kp_driver);
+}
+
+static void __exit dm365_kp_exit(void)
+{
+ platform_driver_unregister(&dm365_kp_driver);
+}
+
+module_init(dm365_kp_init);
+module_exit(dm365_kp_exit);
+
+MODULE_AUTHOR("Miguel Aguilar");
+MODULE_DESCRIPTION("Texas Instruments DaVinci DM365 EVM Keypad Driver");
+MODULE_LICENSE("GPL");
