Input: add support for keyboards on ST SPEAr platform
Signed-off-by: Rajeev Kumar <rajeev-dlh.kumar@st.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/arch/arm/plat-spear/include/plat/keyboard.h b/arch/arm/plat-spear/include/plat/keyboard.h
new file mode 100644
index 0000000..68b5394
--- /dev/null
+++ b/arch/arm/plat-spear/include/plat/keyboard.h
@@ -0,0 +1,141 @@
+/*
+ * Copyright (C) 2010 ST Microelectronics
+ * Rajeev Kumar<rajeev-dlh.kumar@st.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef __PLAT_KEYBOARD_H
+#define __PLAT_KEYBOARD_H
+
+#include <linux/bitops.h>
+#include <linux/input.h>
+#include <linux/input/matrix_keypad.h>
+#include <linux/types.h>
+
+#define DECLARE_KEYMAP(_name) \
+int _name[] = { \
+ KEY(0, 0, KEY_ESC), \
+ KEY(0, 1, KEY_1), \
+ KEY(0, 2, KEY_2), \
+ KEY(0, 3, KEY_3), \
+ KEY(0, 4, KEY_4), \
+ KEY(0, 5, KEY_5), \
+ KEY(0, 6, KEY_6), \
+ KEY(0, 7, KEY_7), \
+ KEY(0, 8, KEY_8), \
+ KEY(1, 0, KEY_9), \
+ KEY(1, 1, KEY_MINUS), \
+ KEY(1, 2, KEY_EQUAL), \
+ KEY(1, 3, KEY_BACKSPACE), \
+ KEY(1, 4, KEY_TAB), \
+ KEY(1, 5, KEY_Q), \
+ KEY(1, 6, KEY_W), \
+ KEY(1, 7, KEY_E), \
+ KEY(1, 8, KEY_R), \
+ KEY(2, 0, KEY_T), \
+ KEY(2, 1, KEY_Y), \
+ KEY(2, 2, KEY_U), \
+ KEY(2, 3, KEY_I), \
+ KEY(2, 4, KEY_O), \
+ KEY(2, 5, KEY_P), \
+ KEY(2, 6, KEY_LEFTBRACE), \
+ KEY(2, 7, KEY_RIGHTBRACE), \
+ KEY(2, 8, KEY_ENTER), \
+ KEY(3, 0, KEY_LEFTCTRL), \
+ KEY(3, 1, KEY_A), \
+ KEY(3, 2, KEY_S), \
+ KEY(3, 3, KEY_D), \
+ KEY(3, 4, KEY_F), \
+ KEY(3, 5, KEY_G), \
+ KEY(3, 6, KEY_H), \
+ KEY(3, 7, KEY_J), \
+ KEY(3, 8, KEY_K), \
+ KEY(4, 0, KEY_L), \
+ KEY(4, 1, KEY_SEMICOLON), \
+ KEY(4, 2, KEY_APOSTROPHE), \
+ KEY(4, 3, KEY_GRAVE), \
+ KEY(4, 4, KEY_LEFTSHIFT), \
+ KEY(4, 5, KEY_BACKSLASH), \
+ KEY(4, 6, KEY_Z), \
+ KEY(4, 7, KEY_X), \
+ KEY(4, 8, KEY_C), \
+ KEY(4, 0, KEY_L), \
+ KEY(4, 1, KEY_SEMICOLON), \
+ KEY(4, 2, KEY_APOSTROPHE), \
+ KEY(4, 3, KEY_GRAVE), \
+ KEY(4, 4, KEY_LEFTSHIFT), \
+ KEY(4, 5, KEY_BACKSLASH), \
+ KEY(4, 6, KEY_Z), \
+ KEY(4, 7, KEY_X), \
+ KEY(4, 8, KEY_C), \
+ KEY(4, 0, KEY_L), \
+ KEY(4, 1, KEY_SEMICOLON), \
+ KEY(4, 2, KEY_APOSTROPHE), \
+ KEY(4, 3, KEY_GRAVE), \
+ KEY(4, 4, KEY_LEFTSHIFT), \
+ KEY(4, 5, KEY_BACKSLASH), \
+ KEY(4, 6, KEY_Z), \
+ KEY(4, 7, KEY_X), \
+ KEY(4, 8, KEY_C), \
+ KEY(5, 0, KEY_V), \
+ KEY(5, 1, KEY_B), \
+ KEY(5, 2, KEY_N), \
+ KEY(5, 3, KEY_M), \
+ KEY(5, 4, KEY_COMMA), \
+ KEY(5, 5, KEY_DOT), \
+ KEY(5, 6, KEY_SLASH), \
+ KEY(5, 7, KEY_RIGHTSHIFT), \
+ KEY(5, 8, KEY_KPASTERISK), \
+ KEY(6, 0, KEY_LEFTALT), \
+ KEY(6, 1, KEY_SPACE), \
+ KEY(6, 2, KEY_CAPSLOCK), \
+ KEY(6, 3, KEY_F1), \
+ KEY(6, 4, KEY_F2), \
+ KEY(6, 5, KEY_F3), \
+ KEY(6, 6, KEY_F4), \
+ KEY(6, 7, KEY_F5), \
+ KEY(6, 8, KEY_F6), \
+ KEY(7, 0, KEY_F7), \
+ KEY(7, 1, KEY_F8), \
+ KEY(7, 2, KEY_F9), \
+ KEY(7, 3, KEY_F10), \
+ KEY(7, 4, KEY_NUMLOCK), \
+ KEY(7, 5, KEY_SCROLLLOCK), \
+ KEY(7, 6, KEY_KP7), \
+ KEY(7, 7, KEY_KP8), \
+ KEY(7, 8, KEY_KP9), \
+ KEY(8, 0, KEY_KPMINUS), \
+ KEY(8, 1, KEY_KP4), \
+ KEY(8, 2, KEY_KP5), \
+ KEY(8, 3, KEY_KP6), \
+ KEY(8, 4, KEY_KPPLUS), \
+ KEY(8, 5, KEY_KP1), \
+ KEY(8, 6, KEY_KP2), \
+ KEY(8, 7, KEY_KP3), \
+ KEY(8, 8, KEY_KP0), \
+}
+
+/**
+ * struct kbd_platform_data - spear keyboard platform data
+ * keymap: pointer to keymap data (table and size)
+ * rep: enables key autorepeat
+ *
+ * This structure is supposed to be used by platform code to supply
+ * keymaps to drivers that implement keyboards.
+ */
+struct kbd_platform_data {
+ const struct matrix_keymap_data *keymap;
+ bool rep;
+};
+
+/* This function is used to set platform data field of pdev->dev */
+static inline void
+kbd_set_plat_data(struct platform_device *pdev, struct kbd_platform_data *data)
+{
+ pdev->dev.platform_data = data;
+}
+
+#endif /* __PLAT_KEYBOARD_H */
diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
index b8c51b9..ee85e5b 100644
--- a/drivers/input/keyboard/Kconfig
+++ b/drivers/input/keyboard/Kconfig
@@ -443,6 +443,15 @@
To compile this driver as a module, choose M here: the
module will be called omap4-keypad.
+config KEYBOARD_SPEAR
+ tristate "ST SPEAR keyboard support"
+ depends on PLAT_SPEAR
+ help
+ Say Y here if you want to use the SPEAR keyboard.
+
+ To compile this driver as a module, choose M here: the
+ module will be called spear-keboard.
+
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..8449c73 100644
--- a/drivers/input/keyboard/Makefile
+++ b/drivers/input/keyboard/Makefile
@@ -37,6 +37,7 @@
obj-$(CONFIG_KEYBOARD_QT2160) += qt2160.o
obj-$(CONFIG_KEYBOARD_SAMSUNG) += samsung-keypad.o
obj-$(CONFIG_KEYBOARD_SH_KEYSC) += sh_keysc.o
+obj-$(CONFIG_KEYBOARD_SPEAR) += spear-keyboard.o
obj-$(CONFIG_KEYBOARD_STMPE) += stmpe-keypad.o
obj-$(CONFIG_KEYBOARD_STOWAWAY) += stowaway.o
obj-$(CONFIG_KEYBOARD_SUNKBD) += sunkbd.o
diff --git a/drivers/input/keyboard/spear-keyboard.c b/drivers/input/keyboard/spear-keyboard.c
new file mode 100644
index 0000000..bee03d6
--- /dev/null
+++ b/drivers/input/keyboard/spear-keyboard.c
@@ -0,0 +1,344 @@
+/*
+ * SPEAr Keyboard Driver
+ * Based on omap-keypad driver
+ *
+ * Copyright (C) 2010 ST Microelectronics
+ * Rajeev Kumar<rajeev-dlh.kumar@st.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/clk.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/input.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_wakeup.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <plat/keyboard.h>
+
+/* Keyboard Registers */
+#define MODE_REG 0x00 /* 16 bit reg */
+#define STATUS_REG 0x0C /* 2 bit reg */
+#define DATA_REG 0x10 /* 8 bit reg */
+#define INTR_MASK 0x54
+
+/* Register Values */
+/*
+ * pclk freq mask = (APB FEQ -1)= 82 MHZ.Programme bit 15-9 in mode
+ * control register as 1010010(82MHZ)
+ */
+#define PCLK_FREQ_MSK 0xA400 /* 82 MHz */
+#define START_SCAN 0x0100
+#define SCAN_RATE_10 0x0000
+#define SCAN_RATE_20 0x0004
+#define SCAN_RATE_40 0x0008
+#define SCAN_RATE_80 0x000C
+#define MODE_KEYBOARD 0x0002
+#define DATA_AVAIL 0x2
+
+#define KEY_MASK 0xFF000000
+#define KEY_VALUE 0x00FFFFFF
+#define ROW_MASK 0xF0
+#define COLUMN_MASK 0x0F
+#define ROW_SHIFT 4
+
+struct spear_kbd {
+ struct input_dev *input;
+ struct resource *res;
+ void __iomem *io_base;
+ struct clk *clk;
+ unsigned int irq;
+ unsigned short last_key;
+ unsigned short keycodes[256];
+};
+
+static irqreturn_t spear_kbd_interrupt(int irq, void *dev_id)
+{
+ struct spear_kbd *kbd = dev_id;
+ struct input_dev *input = kbd->input;
+ unsigned int key;
+ u8 sts, val;
+
+ sts = readb(kbd->io_base + STATUS_REG);
+ if (sts & DATA_AVAIL)
+ return IRQ_NONE;
+
+ if (kbd->last_key != KEY_RESERVED) {
+ input_report_key(input, kbd->last_key, 0);
+ kbd->last_key = KEY_RESERVED;
+ }
+
+ /* following reads active (row, col) pair */
+ val = readb(kbd->io_base + DATA_REG);
+ key = kbd->keycodes[val];
+
+ input_event(input, EV_MSC, MSC_SCAN, val);
+ input_report_key(input, key, 1);
+ input_sync(input);
+
+ kbd->last_key = key;
+
+ /* clear interrupt */
+ writeb(0, kbd->io_base + STATUS_REG);
+
+ return IRQ_HANDLED;
+}
+
+static int spear_kbd_open(struct input_dev *dev)
+{
+ struct spear_kbd *kbd = input_get_drvdata(dev);
+ int error;
+ u16 val;
+
+ kbd->last_key = KEY_RESERVED;
+
+ error = clk_enable(kbd->clk);
+ if (error)
+ return error;
+
+ /* program keyboard */
+ val = SCAN_RATE_80 | MODE_KEYBOARD | PCLK_FREQ_MSK;
+ writew(val, kbd->io_base + MODE_REG);
+ writeb(1, kbd->io_base + STATUS_REG);
+
+ /* start key scan */
+ val = readw(kbd->io_base + MODE_REG);
+ val |= START_SCAN;
+ writew(val, kbd->io_base + MODE_REG);
+
+ return 0;
+}
+
+static void spear_kbd_close(struct input_dev *dev)
+{
+ struct spear_kbd *kbd = input_get_drvdata(dev);
+ u16 val;
+
+ /* stop key scan */
+ val = readw(kbd->io_base + MODE_REG);
+ val &= ~START_SCAN;
+ writew(val, kbd->io_base + MODE_REG);
+
+ clk_disable(kbd->clk);
+
+ kbd->last_key = KEY_RESERVED;
+}
+
+static int __devinit spear_kbd_probe(struct platform_device *pdev)
+{
+ const struct kbd_platform_data *pdata = pdev->dev.platform_data;
+ const struct matrix_keymap_data *keymap;
+ struct spear_kbd *kbd;
+ struct input_dev *input_dev;
+ struct resource *res;
+ int irq;
+ int error;
+
+ if (!pdata) {
+ dev_err(&pdev->dev, "Invalid platform data\n");
+ return -EINVAL;
+ }
+
+ keymap = pdata->keymap;
+ if (!keymap) {
+ dev_err(&pdev->dev, "no keymap defined\n");
+ return -EINVAL;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "no keyboard resource defined\n");
+ return -EBUSY;
+ }
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "not able to get irq for the device\n");
+ return irq;
+ }
+
+ kbd = kzalloc(sizeof(*kbd), GFP_KERNEL);
+ input_dev = input_allocate_device();
+ if (!kbd || !input_dev) {
+ dev_err(&pdev->dev, "out of memory\n");
+ error = -ENOMEM;
+ goto err_free_mem;
+ }
+
+ kbd->input = input_dev;
+ kbd->irq = irq;
+ kbd->res = request_mem_region(res->start, resource_size(res),
+ pdev->name);
+ if (!kbd->res) {
+ dev_err(&pdev->dev, "keyboard region already claimed\n");
+ error = -EBUSY;
+ goto err_free_mem;
+ }
+
+ kbd->io_base = ioremap(res->start, resource_size(res));
+ if (!kbd->io_base) {
+ dev_err(&pdev->dev, "ioremap failed for kbd_region\n");
+ error = -ENOMEM;
+ goto err_release_mem_region;
+ }
+
+ kbd->clk = clk_get(&pdev->dev, NULL);
+ if (IS_ERR(kbd->clk)) {
+ error = PTR_ERR(kbd->clk);
+ goto err_iounmap;
+ }
+
+ input_dev->name = "Spear Keyboard";
+ input_dev->phys = "keyboard/input0";
+ input_dev->dev.parent = &pdev->dev;
+ input_dev->id.bustype = BUS_HOST;
+ input_dev->id.vendor = 0x0001;
+ input_dev->id.product = 0x0001;
+ input_dev->id.version = 0x0100;
+ input_dev->open = spear_kbd_open;
+ input_dev->close = spear_kbd_close;
+
+ __set_bit(EV_KEY, input_dev->evbit);
+ if (pdata->rep)
+ __set_bit(EV_REP, input_dev->evbit);
+ input_set_capability(input_dev, EV_MSC, MSC_SCAN);
+
+ input_dev->keycode = kbd->keycodes;
+ input_dev->keycodesize = sizeof(kbd->keycodes[0]);
+ input_dev->keycodemax = ARRAY_SIZE(kbd->keycodes);
+
+ matrix_keypad_build_keymap(keymap, ROW_SHIFT,
+ input_dev->keycode, input_dev->keybit);
+
+ input_set_drvdata(input_dev, kbd);
+
+ error = request_irq(irq, spear_kbd_interrupt, 0, "keyboard", kbd);
+ if (error) {
+ dev_err(&pdev->dev, "request_irq fail\n");
+ goto err_put_clk;
+ }
+
+ error = input_register_device(input_dev);
+ if (error) {
+ dev_err(&pdev->dev, "Unable to register keyboard device\n");
+ goto err_free_irq;
+ }
+
+ device_init_wakeup(&pdev->dev, 1);
+ platform_set_drvdata(pdev, kbd);
+
+ return 0;
+
+err_free_irq:
+ free_irq(kbd->irq, kbd);
+err_put_clk:
+ clk_put(kbd->clk);
+err_iounmap:
+ iounmap(kbd->io_base);
+err_release_mem_region:
+ release_mem_region(res->start, resource_size(res));
+err_free_mem:
+ input_free_device(input_dev);
+ kfree(kbd);
+
+ return error;
+}
+
+static int __devexit spear_kbd_remove(struct platform_device *pdev)
+{
+ struct spear_kbd *kbd = platform_get_drvdata(pdev);
+
+ free_irq(kbd->irq, kbd);
+ input_unregister_device(kbd->input);
+ clk_put(kbd->clk);
+ iounmap(kbd->io_base);
+ release_mem_region(kbd->res->start, resource_size(kbd->res));
+ kfree(kbd);
+
+ device_init_wakeup(&pdev->dev, 1);
+ platform_set_drvdata(pdev, NULL);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int spear_kbd_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct spear_kbd *kbd = platform_get_drvdata(pdev);
+ struct input_dev *input_dev = kbd->input;
+
+ mutex_lock(&input_dev->mutex);
+
+ if (input_dev->users)
+ clk_enable(kbd->clk);
+
+ if (device_may_wakeup(&pdev->dev))
+ enable_irq_wake(kbd->irq);
+
+ mutex_unlock(&input_dev->mutex);
+
+ return 0;
+}
+
+static int spear_kbd_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct spear_kbd *kbd = platform_get_drvdata(pdev);
+ struct input_dev *input_dev = kbd->input;
+
+ mutex_lock(&input_dev->mutex);
+
+ if (device_may_wakeup(&pdev->dev))
+ disable_irq_wake(kbd->irq);
+
+ if (input_dev->users)
+ clk_enable(kbd->clk);
+
+ mutex_unlock(&input_dev->mutex);
+
+ return 0;
+}
+
+static const struct dev_pm_ops spear_kbd_pm_ops = {
+ .suspend = spear_kbd_suspend,
+ .resume = spear_kbd_resume,
+};
+#endif
+
+static struct platform_driver spear_kbd_driver = {
+ .probe = spear_kbd_probe,
+ .remove = __devexit_p(spear_kbd_remove),
+ .driver = {
+ .name = "keyboard",
+ .owner = THIS_MODULE,
+#ifdef CONFIG_PM
+ .pm = &spear_kbd_pm_ops,
+#endif
+ },
+};
+
+static int __init spear_kbd_init(void)
+{
+ return platform_driver_register(&spear_kbd_driver);
+}
+module_init(spear_kbd_init);
+
+static void __exit spear_kbd_exit(void)
+{
+ platform_driver_unregister(&spear_kbd_driver);
+}
+module_exit(spear_kbd_exit);
+
+MODULE_AUTHOR("Rajeev Kumar");
+MODULE_DESCRIPTION("SPEAr Keyboard Driver");
+MODULE_LICENSE("GPL");