Commit fff71312 authored by Richard Purdie's avatar Richard Purdie Committed by Linus Torvalds
Browse files

[PATCH] SharpSL: Add an input keyboard driver for Zaurus cxx00 series



Add a input driver for the keyboard found on the Zaurus Cxx00 series (Spitz,
Akita, Borzoi).  Its based on corgikbd but there are enough subtle differences
to justify a separate driver.
Signed-Off-by: default avatarRichard Purdie <rpurdie@rpsys.net>
Cc: Vojtech Pavlik <vojtech@suse.cz>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 0dd28f1d
......@@ -132,6 +132,17 @@ config KEYBOARD_CORGI
To compile this driver as a module, choose M here: the
module will be called corgikbd.
config KEYBOARD_SPITZ
tristate "Spitz keyboard"
depends on PXA_SHARPSL
default y
help
Say Y here to enable the keyboard on the Sharp Zaurus SL-C1000,
SL-C3000 and Sl-C3100 series of PDAs.
To compile this driver as a module, choose M here: the
module will be called spitzkbd.
config KEYBOARD_MAPLE
tristate "Maple bus keyboard"
depends on SH_DREAMCAST && MAPLE
......
......@@ -14,6 +14,7 @@ obj-$(CONFIG_KEYBOARD_LOCOMO) += locomokbd.o
obj-$(CONFIG_KEYBOARD_NEWTON) += newtonkbd.o
obj-$(CONFIG_KEYBOARD_98KBD) += 98kbd.o
obj-$(CONFIG_KEYBOARD_CORGI) += corgikbd.o
obj-$(CONFIG_KEYBOARD_SPITZ) += spitzkbd.o
obj-$(CONFIG_KEYBOARD_HIL) += hil_kbd.o
obj-$(CONFIG_KEYBOARD_HIL_OLD) += hilkbd.o
/*
* Keyboard driver for Sharp Spitz, Borzoi and Akita (SL-Cxx00 series)
*
* Copyright (c) 2005 Richard Purdie
*
* Based on corgikbd.c
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/jiffies.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <asm/irq.h>
#include <asm/arch/spitz.h>
#include <asm/arch/hardware.h>
#include <asm/arch/pxa-regs.h>
#define KB_ROWS 7
#define KB_COLS 11
#define KB_ROWMASK(r) (1 << (r))
#define SCANCODE(r,c) (((r)<<4) + (c) + 1)
#define NR_SCANCODES ((KB_ROWS<<4) + 1)
#define HINGE_SCAN_INTERVAL (150) /* ms */
#define SPITZ_KEY_CALENDER KEY_F1
#define SPITZ_KEY_ADDRESS KEY_F2
#define SPITZ_KEY_FN KEY_F3
#define SPITZ_KEY_CANCEL KEY_F4
#define SPITZ_KEY_EXOK KEY_F5
#define SPITZ_KEY_EXCANCEL KEY_F6
#define SPITZ_KEY_EXJOGDOWN KEY_F7
#define SPITZ_KEY_EXJOGUP KEY_F8
#define SPITZ_KEY_JAP1 KEY_LEFTALT
#define SPITZ_KEY_JAP2 KEY_RIGHTCTRL
#define SPITZ_KEY_SYNC KEY_F9
#define SPITZ_KEY_MAIL KEY_F10
#define SPITZ_KEY_OK KEY_F11
#define SPITZ_KEY_MENU KEY_F12
static unsigned char spitzkbd_keycode[NR_SCANCODES] = {
0, /* 0 */
KEY_LEFTCTRL, KEY_1, KEY_3, KEY_5, KEY_6, KEY_7, KEY_9, KEY_0, KEY_BACKSPACE, SPITZ_KEY_EXOK, SPITZ_KEY_EXCANCEL, 0, 0, 0, 0, 0, /* 1-16 */
0, KEY_2, KEY_4, KEY_R, KEY_Y, KEY_8, KEY_I, KEY_O, KEY_P, SPITZ_KEY_EXJOGDOWN, SPITZ_KEY_EXJOGUP, 0, 0, 0, 0, 0, /* 17-32 */
KEY_TAB, KEY_Q, KEY_E, KEY_T, KEY_G, KEY_U, KEY_J, KEY_K, 0, 0, 0, 0, 0, 0, 0, 0, /* 33-48 */
SPITZ_KEY_CALENDER, KEY_W, KEY_S, KEY_F, KEY_V, KEY_H, KEY_M, KEY_L, 0, 0, KEY_RIGHTSHIFT, 0, 0, 0, 0, 0, /* 49-64 */
SPITZ_KEY_ADDRESS, KEY_A, KEY_D, KEY_C, KEY_B, KEY_N, KEY_DOT, 0, KEY_ENTER, KEY_LEFTSHIFT, 0, 0, 0, 0, 0, 0, /* 65-80 */
SPITZ_KEY_MAIL, KEY_Z, KEY_X, KEY_MINUS, KEY_SPACE, KEY_COMMA, 0, KEY_UP, 0, 0, SPITZ_KEY_FN, 0, 0, 0, 0, 0, /* 81-96 */
KEY_SYSRQ, SPITZ_KEY_JAP1, SPITZ_KEY_JAP2, SPITZ_KEY_CANCEL, SPITZ_KEY_OK, SPITZ_KEY_MENU, KEY_LEFT, KEY_DOWN, KEY_RIGHT, 0, 0, 0, 0, 0, 0, 0 /* 97-112 */
};
static int spitz_strobes[] = {
SPITZ_GPIO_KEY_STROBE0,
SPITZ_GPIO_KEY_STROBE1,
SPITZ_GPIO_KEY_STROBE2,
SPITZ_GPIO_KEY_STROBE3,
SPITZ_GPIO_KEY_STROBE4,
SPITZ_GPIO_KEY_STROBE5,
SPITZ_GPIO_KEY_STROBE6,
SPITZ_GPIO_KEY_STROBE7,
SPITZ_GPIO_KEY_STROBE8,
SPITZ_GPIO_KEY_STROBE9,
SPITZ_GPIO_KEY_STROBE10,
};
static int spitz_senses[] = {
SPITZ_GPIO_KEY_SENSE0,
SPITZ_GPIO_KEY_SENSE1,
SPITZ_GPIO_KEY_SENSE2,
SPITZ_GPIO_KEY_SENSE3,
SPITZ_GPIO_KEY_SENSE4,
SPITZ_GPIO_KEY_SENSE5,
SPITZ_GPIO_KEY_SENSE6,
};
struct spitzkbd {
unsigned char keycode[ARRAY_SIZE(spitzkbd_keycode)];
struct input_dev input;
char phys[32];
spinlock_t lock;
struct timer_list timer;
struct timer_list htimer;
unsigned int suspended;
unsigned long suspend_jiffies;
};
#define KB_DISCHARGE_DELAY 10
#define KB_ACTIVATE_DELAY 10
/* Helper functions for reading the keyboard matrix
* Note: We should really be using pxa_gpio_mode to alter GPDR but it
* requires a function call per GPIO bit which is excessive
* when we need to access 11 bits at once, multiple times.
* These functions must be called within local_irq_save()/local_irq_restore()
* or similar.
*/
static inline void spitzkbd_discharge_all(void)
{
/* STROBE All HiZ */
GPCR0 = SPITZ_GPIO_G0_STROBE_BIT;
GPDR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
GPCR1 = SPITZ_GPIO_G1_STROBE_BIT;
GPDR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
GPCR2 = SPITZ_GPIO_G2_STROBE_BIT;
GPDR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
GPCR3 = SPITZ_GPIO_G3_STROBE_BIT;
GPDR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
}
static inline void spitzkbd_activate_all(void)
{
/* STROBE ALL -> High */
GPSR0 = SPITZ_GPIO_G0_STROBE_BIT;
GPDR0 |= SPITZ_GPIO_G0_STROBE_BIT;
GPSR1 = SPITZ_GPIO_G1_STROBE_BIT;
GPDR1 |= SPITZ_GPIO_G1_STROBE_BIT;
GPSR2 = SPITZ_GPIO_G2_STROBE_BIT;
GPDR2 |= SPITZ_GPIO_G2_STROBE_BIT;
GPSR3 = SPITZ_GPIO_G3_STROBE_BIT;
GPDR3 |= SPITZ_GPIO_G3_STROBE_BIT;
udelay(KB_DISCHARGE_DELAY);
/* Clear any interrupts we may have triggered when altering the GPIO lines */
GEDR0 = SPITZ_GPIO_G0_SENSE_BIT;
GEDR1 = SPITZ_GPIO_G1_SENSE_BIT;
GEDR2 = SPITZ_GPIO_G2_SENSE_BIT;
GEDR3 = SPITZ_GPIO_G3_SENSE_BIT;
}
static inline void spitzkbd_activate_col(int col)
{
int gpio = spitz_strobes[col];
GPDR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
GPDR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
GPDR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
GPDR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
GPSR(gpio) = GPIO_bit(gpio);
GPDR(gpio) |= GPIO_bit(gpio);
}
static inline void spitzkbd_reset_col(int col)
{
int gpio = spitz_strobes[col];
GPDR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
GPDR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
GPDR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
GPDR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
GPCR(gpio) = GPIO_bit(gpio);
GPDR(gpio) |= GPIO_bit(gpio);
}
static inline int spitzkbd_get_row_status(int col)
{
return ((GPLR0 >> 12) & 0x01) | ((GPLR0 >> 16) & 0x02)
| ((GPLR2 >> 25) & 0x04) | ((GPLR1 << 1) & 0x08)
| ((GPLR1 >> 0) & 0x10) | ((GPLR1 >> 1) & 0x60);
}
/*
* The spitz keyboard only generates interrupts when a key is pressed.
* When a key is pressed, we enable a timer which then scans the
* keyboard to detect when the key is released.
*/
/* Scan the hardware keyboard and push any changes up through the input layer */
static void spitzkbd_scankeyboard(struct spitzkbd *spitzkbd_data, struct pt_regs *regs)
{
unsigned int row, col, rowd;
unsigned long flags;
unsigned int num_pressed, pwrkey = ((GPLR(SPITZ_GPIO_ON_KEY) & GPIO_bit(SPITZ_GPIO_ON_KEY)) != 0);
if (spitzkbd_data->suspended)
return;
spin_lock_irqsave(&spitzkbd_data->lock, flags);
if (regs)
input_regs(&spitzkbd_data->input, regs);
num_pressed = 0;
for (col = 0; col < KB_COLS; col++) {
/*
* Discharge the output driver capacitatance
* in the keyboard matrix. (Yes it is significant..)
*/
spitzkbd_discharge_all();
udelay(KB_DISCHARGE_DELAY);
spitzkbd_activate_col(col);
udelay(KB_ACTIVATE_DELAY);
rowd = spitzkbd_get_row_status(col);
for (row = 0; row < KB_ROWS; row++) {
unsigned int scancode, pressed;
scancode = SCANCODE(row, col);
pressed = rowd & KB_ROWMASK(row);
input_report_key(&spitzkbd_data->input, spitzkbd_data->keycode[scancode], pressed);
if (pressed)
num_pressed++;
}
spitzkbd_reset_col(col);
}
spitzkbd_activate_all();
input_report_key(&spitzkbd_data->input, SPITZ_KEY_SYNC, (GPLR(SPITZ_GPIO_SYNC) & GPIO_bit(SPITZ_GPIO_SYNC)) != 0 );
input_report_key(&spitzkbd_data->input, KEY_SUSPEND, pwrkey);
if (pwrkey && time_after(jiffies, spitzkbd_data->suspend_jiffies + msecs_to_jiffies(1000))) {
input_event(&spitzkbd_data->input, EV_PWR, KEY_SUSPEND, 1);
spitzkbd_data->suspend_jiffies = jiffies;
}
input_sync(&spitzkbd_data->input);
/* if any keys are pressed, enable the timer */
if (num_pressed)
mod_timer(&spitzkbd_data->timer, jiffies + msecs_to_jiffies(100));
spin_unlock_irqrestore(&spitzkbd_data->lock, flags);
}
/*
* spitz keyboard interrupt handler.
*/
static irqreturn_t spitzkbd_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
struct spitzkbd *spitzkbd_data = dev_id;
if (!timer_pending(&spitzkbd_data->timer)) {
/** wait chattering delay **/
udelay(20);
spitzkbd_scankeyboard(spitzkbd_data, regs);
}
return IRQ_HANDLED;
}
/*
* spitz timer checking for released keys
*/
static void spitzkbd_timer_callback(unsigned long data)
{
struct spitzkbd *spitzkbd_data = (struct spitzkbd *) data;
spitzkbd_scankeyboard(spitzkbd_data, NULL);
}
/*
* The hinge switches generate an interrupt.
* We debounce the switches and pass them to the input system.
*/
static irqreturn_t spitzkbd_hinge_isr(int irq, void *dev_id, struct pt_regs *regs)
{
struct spitzkbd *spitzkbd_data = dev_id;
if (!timer_pending(&spitzkbd_data->htimer))
mod_timer(&spitzkbd_data->htimer, jiffies + msecs_to_jiffies(HINGE_SCAN_INTERVAL));
return IRQ_HANDLED;
}
#define HINGE_STABLE_COUNT 2
static int sharpsl_hinge_state;
static int hinge_count;
static void spitzkbd_hinge_timer(unsigned long data)
{
struct spitzkbd *spitzkbd_data = (struct spitzkbd *) data;
unsigned long state;
unsigned long flags;
state = GPLR(SPITZ_GPIO_SWA) & (GPIO_bit(SPITZ_GPIO_SWA)|GPIO_bit(SPITZ_GPIO_SWB));
if (state != sharpsl_hinge_state) {
hinge_count = 0;
sharpsl_hinge_state = state;
} else if (hinge_count < HINGE_STABLE_COUNT) {
hinge_count++;
}
if (hinge_count >= HINGE_STABLE_COUNT) {
spin_lock_irqsave(&spitzkbd_data->lock, flags);
input_report_switch(&spitzkbd_data->input, SW_0, ((GPLR(SPITZ_GPIO_SWA) & GPIO_bit(SPITZ_GPIO_SWA)) != 0));
input_report_switch(&spitzkbd_data->input, SW_1, ((GPLR(SPITZ_GPIO_SWB) & GPIO_bit(SPITZ_GPIO_SWB)) != 0));
input_sync(&spitzkbd_data->input);
spin_unlock_irqrestore(&spitzkbd_data->lock, flags);
} else {
mod_timer(&spitzkbd_data->htimer, jiffies + msecs_to_jiffies(HINGE_SCAN_INTERVAL));
}
}
#ifdef CONFIG_PM
static int spitzkbd_suspend(struct device *dev, pm_message_t state, uint32_t level)
{
if (level == SUSPEND_POWER_DOWN) {
int i;
struct spitzkbd *spitzkbd = dev_get_drvdata(dev);
spitzkbd->suspended = 1;
/* Set Strobe lines as inputs - *except* strobe line 0 leave this
enabled so we can detect a power button press for resume */
for (i = 1; i < SPITZ_KEY_STROBE_NUM; i++)
pxa_gpio_mode(spitz_strobes[i] | GPIO_IN);
}
return 0;
}
static int spitzkbd_resume(struct device *dev, uint32_t level)
{
if (level == RESUME_POWER_ON) {
int i;
struct spitzkbd *spitzkbd = dev_get_drvdata(dev);
for (i = 0; i < SPITZ_KEY_STROBE_NUM; i++)
pxa_gpio_mode(spitz_strobes[i] | GPIO_OUT | GPIO_DFLT_HIGH);
/* Upon resume, ignore the suspend key for a short while */
spitzkbd->suspend_jiffies = jiffies;
spitzkbd->suspended = 0;
}
return 0;
}
#else
#define spitzkbd_suspend NULL
#define spitzkbd_resume NULL
#endif
static int __init spitzkbd_probe(struct device *dev)
{
int i;
struct spitzkbd *spitzkbd;
spitzkbd = kzalloc(sizeof(struct spitzkbd), GFP_KERNEL);
if (!spitzkbd)
return -ENOMEM;
dev_set_drvdata(dev,spitzkbd);
strcpy(spitzkbd->phys, "spitzkbd/input0");
spin_lock_init(&spitzkbd->lock);
/* Init Keyboard rescan timer */
init_timer(&spitzkbd->timer);
spitzkbd->timer.function = spitzkbd_timer_callback;
spitzkbd->timer.data = (unsigned long) spitzkbd;
/* Init Hinge Timer */
init_timer(&spitzkbd->htimer);
spitzkbd->htimer.function = spitzkbd_hinge_timer;
spitzkbd->htimer.data = (unsigned long) spitzkbd;
spitzkbd->suspend_jiffies=jiffies;
init_input_dev(&spitzkbd->input);
spitzkbd->input.private = spitzkbd;
spitzkbd->input.name = "Spitz Keyboard";
spitzkbd->input.dev = dev;
spitzkbd->input.phys = spitzkbd->phys;
spitzkbd->input.id.bustype = BUS_HOST;
spitzkbd->input.id.vendor = 0x0001;
spitzkbd->input.id.product = 0x0001;
spitzkbd->input.id.version = 0x0100;
spitzkbd->input.evbit[0] = BIT(EV_KEY) | BIT(EV_REP) | BIT(EV_PWR) | BIT(EV_SW);
spitzkbd->input.keycode = spitzkbd->keycode;
spitzkbd->input.keycodesize = sizeof(unsigned char);
spitzkbd->input.keycodemax = ARRAY_SIZE(spitzkbd_keycode);
memcpy(spitzkbd->keycode, spitzkbd_keycode, sizeof(spitzkbd->keycode));
for (i = 0; i < ARRAY_SIZE(spitzkbd_keycode); i++)
set_bit(spitzkbd->keycode[i], spitzkbd->input.keybit);
clear_bit(0, spitzkbd->input.keybit);
set_bit(SW_0, spitzkbd->input.swbit);
set_bit(SW_1, spitzkbd->input.swbit);
input_register_device(&spitzkbd->input);
mod_timer(&spitzkbd->htimer, jiffies + msecs_to_jiffies(HINGE_SCAN_INTERVAL));
/* Setup sense interrupts - RisingEdge Detect, sense lines as inputs */
for (i = 0; i < SPITZ_KEY_SENSE_NUM; i++) {
pxa_gpio_mode(spitz_senses[i] | GPIO_IN);
if (request_irq(IRQ_GPIO(spitz_senses[i]), spitzkbd_interrupt,
SA_INTERRUPT, "Spitzkbd Sense", spitzkbd))
printk(KERN_WARNING "spitzkbd: Can't get Sense IRQ: %d!\n", i);
else
set_irq_type(IRQ_GPIO(spitz_senses[i]),IRQT_RISING);
}
/* Set Strobe lines as outputs - set high */
for (i = 0; i < SPITZ_KEY_STROBE_NUM; i++)
pxa_gpio_mode(spitz_strobes[i] | GPIO_OUT | GPIO_DFLT_HIGH);
pxa_gpio_mode(SPITZ_GPIO_SYNC | GPIO_IN);
pxa_gpio_mode(SPITZ_GPIO_ON_KEY | GPIO_IN);
pxa_gpio_mode(SPITZ_GPIO_SWA | GPIO_IN);
pxa_gpio_mode(SPITZ_GPIO_SWB | GPIO_IN);
request_irq(SPITZ_IRQ_GPIO_SYNC, spitzkbd_interrupt, SA_INTERRUPT, "Spitzkbd Sync", spitzkbd);
request_irq(SPITZ_IRQ_GPIO_ON_KEY, spitzkbd_interrupt, SA_INTERRUPT, "Spitzkbd PwrOn", spitzkbd);
request_irq(SPITZ_IRQ_GPIO_SWA, spitzkbd_hinge_isr, SA_INTERRUPT, "Spitzkbd SWA", spitzkbd);
request_irq(SPITZ_IRQ_GPIO_SWB, spitzkbd_hinge_isr, SA_INTERRUPT, "Spitzkbd SWB", spitzkbd);
set_irq_type(SPITZ_IRQ_GPIO_SYNC, IRQT_BOTHEDGE);
set_irq_type(SPITZ_IRQ_GPIO_ON_KEY, IRQT_BOTHEDGE);
set_irq_type(SPITZ_IRQ_GPIO_SWA, IRQT_BOTHEDGE);
set_irq_type(SPITZ_IRQ_GPIO_SWB, IRQT_BOTHEDGE);
printk(KERN_INFO "input: Spitz Keyboard Registered\n");
return 0;
}
static int spitzkbd_remove(struct device *dev)
{
int i;
struct spitzkbd *spitzkbd = dev_get_drvdata(dev);
for (i = 0; i < SPITZ_KEY_SENSE_NUM; i++)
free_irq(IRQ_GPIO(spitz_senses[i]), spitzkbd);
free_irq(SPITZ_IRQ_GPIO_SYNC, spitzkbd);
free_irq(SPITZ_IRQ_GPIO_ON_KEY, spitzkbd);
free_irq(SPITZ_IRQ_GPIO_SWA, spitzkbd);
free_irq(SPITZ_IRQ_GPIO_SWB, spitzkbd);
del_timer_sync(&spitzkbd->htimer);
del_timer_sync(&spitzkbd->timer);
input_unregister_device(&spitzkbd->input);
kfree(spitzkbd);
return 0;
}
static struct device_driver spitzkbd_driver = {
.name = "spitz-keyboard",
.bus = &platform_bus_type,
.probe = spitzkbd_probe,
.remove = spitzkbd_remove,
.suspend = spitzkbd_suspend,
.resume = spitzkbd_resume,
};
static int __devinit spitzkbd_init(void)
{
return driver_register(&spitzkbd_driver);
}
static void __exit spitzkbd_exit(void)
{
driver_unregister(&spitzkbd_driver);
}
module_init(spitzkbd_init);
module_exit(spitzkbd_exit);
MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>");
MODULE_DESCRIPTION("Spitz Keyboard Driver");
MODULE_LICENSE("GPLv2");
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