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Commit bc95df78 authored by Rajeev Kumar's avatar Rajeev Kumar Committed by Dmitry Torokhov
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Input: add support for keyboards on ST SPEAr platform 

Signed-off-by: default avatarRajeev Kumar <rajeev-dlh.kumar@st.com>
Signed-off-by: default avatarDmitry Torokhov <dtor@mail.ru>
parent c44f2420
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arch/arm/plat-spear/include/plat/keyboard.h 0 → 100644
View file @ bc95df78
/*
* 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 */
drivers/input/keyboard/Kconfig
View file @ bc95df78
......@@ -443,6 +443,15 @@ config KEYBOARD_OMAP4
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
......
drivers/input/keyboard/Makefile
View file @ bc95df78
......@@ -37,6 +37,7 @@ obj-$(CONFIG_KEYBOARD_PXA930_ROTARY) += pxa930_rotary.o
obj-$(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
......
drivers/input/keyboard/spear-keyboard.c 0 → 100644
View file @ bc95df78
/*
* 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");
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