www.pudn.com > ev44b0ii_kbd.rar > ev44b0ii_kbd.c
/*
* linux/drivers/char/ev44b0_kbd.c
*
* Copyright (C) 2003 MICETEK International Inc.,
* Qin Wei
*
* 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
*
* This keyboard driver drives a PS/2 keyboard and mouse connected
* to the KMI interfaces. The KMI interfaces are nothing more than
* a uart; there is no inteligence in them to do keycode translation.
* We leave all that up to the keyboard itself.
*/
#include
#include
#include
#include /* for in_interrupt */
#include
#include
#include /* for udelay */
#include /* for keyboard_tasklet */
#include
#include
#include
#include
#include
#include
/*
* Responses : SPI STATUS Reigster SPSTA
*/
#define SPI_COLLISION_ERROR 0x4
#define SPI_MULTI_MASTER_ERROR 0x2
#define SPI_RX_TX_READY 0x1
#define UNSET_OUTPUT() (rGPBDAT &= ~(0x1<<6))
#define SET_OUTPUT() (rGPBDAT |= (0x1<<6))
/************** from 2.2.12 **********************/
#define KBCTL_NODATA -1
#define KBCTL_AGAIN -2
static int key_fn_down = 0;
static int key_numl_down = 0;
/****************************************************/
static struct kbd_info s3c2410_keyboard __initdata = {
irq: IRQ_EINT1,
};
static struct kbd_info *s3c_keyb= &s3c2410_keyboard;
#define ONEBIT 0x1
/*
* The "program" we send to the keyboard to set it up how we want it:
* - default typematic delays
* - scancode set 1
*/
static void key_interrupt(int nr, void *devid, struct pt_regs *regs)
{
u_int val= 0 ;
int x=0 ,y=0;
static int lastc = -1;
int ret = 0;
kbd_pt_regs = regs;
UNSET_OUTPUT();
while (! ( (rSPSTA1) & SPI_RX_TX_READY ));
while (! ( (rSPSTA1) & SPI_RX_TX_READY ));
SET_OUTPUT();
x = val&0xff; /* get char by sending one */
if (x == lastc || x == 0 || x == 0xff) {
ret = KBCTL_NODATA;
tasklet_schedule(&keyboard_tasklet);
}
lastc = x;
if ( x & 0x80) { /* key up */
x &= 0x7f;
if (x == 0x21) { /* fn key up */
key_fn_down = 0;
ret = KBCTL_AGAIN;
}
else {
if (key_fn_down) { /* this is a fn modified key */
y = kbmapFN[x];
if (y == KK_NUML) ret= KBCTL_AGAIN;
}
else {
if (key_numl_down) /* this is a numlock modified key */
y = kbmapNL[x];
else y = kbmap[x];
}
}
ret = (y | 0x80);
} else { /* key down */
/* key down */
if (x == 0x21) { /* fn key down */
key_fn_down = 1;
ret = KBCTL_AGAIN;
}
else {
if (key_fn_down) { /* this is a fn modified key */
y = kbmapFN[x];
if (y == KK_NUML) { /* toggle local numlock */
key_numl_down = !key_numl_down;
ret= KBCTL_AGAIN;
}
}
else {
if (key_numl_down) /* this is a numlock modified key */
y = kbmapNL[x];
else
y = kbmap[x];
}
}
ret = y;
}
if ( ret != KBCTL_NODATA ) {
if ( ret != KBCTL_AGAIN && ret != KK_NONE)
handle_scancode(ret, !(ret & 0x80));
tasklet_schedule(&keyboard_tasklet);
}
}
/********************
* You must see SPIcoder 06 UR5HCSPI-06 manual and Schematic of S3C2410
*/
static int __init HW_kbd_init(struct kbd_info *kbd)
{
int ret = -ENODEV;
int delay ;
printk(KERN_INFO "Loading keyboard on irq %d \n",kbd->irq);
rGPFCON &= ~(0x3 << 2); // Clear GPF1
rGPFCON |= (0x2 << 2); // Set GPF1 to EINT1 for Keyboard interrupt
rEXTINT0 &= ~(0x7 << 4); // Clear EINT1
rEXTINT0 |= (0x2 << 4); // fallig edge triggered for EINT1
// setup SPI interface
// GPG5 : SPIMISO (KBDSPIMISO)
// GPG6 : SPIMOSI (KBDSPIMOSI)
// GPG7 : SPICLK (KBDSPICLK)
rGPGCON &= ~((0x3 << 10) | (0x3 << 12) | (0x3 << 14)); // Clear GPG5,6,7
rGPGCON |= ((0x3 << 10) | (0x3 << 12) | (0x3 << 14));
// setup _SS signal(nSS_KBD)
rGPBCON &= ~(0x3 << 12); // Clear GPB6
rGPBCON |= (ONEBIT << 12); // Set Port GPB6 to output for nSS signal
// setup _PWR_OK signal (KEYBOARD)
rGPBCON &= ~(0x3 << 0); // Clear GPB0
rGPBCON |= (ONEBIT << 0); // Set Port GPB0 to output for _PWR_OK signal
rGPDDAT &=~(ONEBIT << 0); // set _PWR_OK to 0
// Setup SPI registers
// Interrupt mode, prescaler enable, master mode, active high clock, format B, normal mode
rSPCON1 = (ONEBIT<<5)|(ONEBIT<<4)|(ONEBIT<<3)|(0x0<<2)|(ONEBIT<<1);
// Developer MUST change the value of prescaler properly whenever value of PCLK is changed.
rSPPRE1 = 255;
// 99.121K = 203M/4/2/(255+1) PCLK=50.75Mhz FCLK=203Mhz SPICLK=99.121Khz
/*
* Claim the appropriate interrupts
*/
if (ret = request_irq(kbd->irq, key_interrupt, SA_INTERRUPT,"keyboard", kbd))
printk(KERN_INFO " ---> can't get assinged irq %d\n", kbd->irq);
if (ret)goto bad;
kbd->present = 1;
return ret;
bad:
/*
* Oh dear, the interface was bad, disable it.
*/
printk(" Oh dear, the interface was bas ..\n");
return ret;
}
#ifdef CONFIG_VT
/*
* The fragment between #ifdef above and #endif * CONFIG_VT *
* is from the pc_keyb.c driver. It is not copyrighted under the
* above notice. This code is by various authors; please see
* drivers/char/pc_keyb.c for further information.
*/
/*
* Translation of escaped scancodes to keycodes.
* This is now user-settable.
* The keycodes 1-88,96-111,119 are fairly standard, and
* should probably not be changed - changing might confuse X.
* X also interprets scancode 0x5d (KEY_Begin).
*
* For 1-88 keycode equals scancode.
*/
#define E0_KPENTER 96
#define E0_RCTRL 97
#define E0_KPSLASH 98
#define E0_PRSCR 99
#define E0_RALT 100
#define E0_BREAK 101 /* (control-pause) */
#define E0_HOME 102
#define E0_UP 103
#define E0_PGUP 104
#define E0_LEFT 105
#define E0_RIGHT 106
#define E0_END 107
#define E0_DOWN 108
#define E0_PGDN 109
#define E0_INS 110
#define E0_DEL 111
#define E1_PAUSE 119
/*
* The keycodes below are randomly located in 89-95,112-118,120-127.
* They could be thrown away (and all occurrences below replaced by 0),
* but that would force many users to use the `setkeycodes' utility, where
* they needed not before. It does not matter that there are duplicates, as
* long as no duplication occurs for any single keyboard.
*/
#define SC_LIM 89
#define FOCUS_PF1 85 /* actual code! */
#define FOCUS_PF2 89
#define FOCUS_PF3 90
#define FOCUS_PF4 91
#define FOCUS_PF5 92
#define FOCUS_PF6 93
#define FOCUS_PF7 94
#define FOCUS_PF8 95
#define FOCUS_PF9 120
#define FOCUS_PF10 121
#define FOCUS_PF11 122
#define FOCUS_PF12 123
#define JAP_86 124
/* tfj@olivia.ping.dk:
* The four keys are located over the numeric keypad, and are
* labelled A1-A4. It's an rc930 keyboard, from
* Regnecentralen/RC International, Now ICL.
* Scancodes: 59, 5a, 5b, 5c.
*/
#define RGN1 124
#define RGN2 125
#define RGN3 126
#define RGN4 127
static unsigned char high_keys[128 - SC_LIM] = {
RGN1, RGN2, RGN3, RGN4, 0, 0, 0, /* 0x59-0x5f */
0, 0, 0, 0, 0, 0, 0, 0, /* 0x60-0x67 */
0, 0, 0, 0, 0, FOCUS_PF11, 0, FOCUS_PF12, /* 0x68-0x6f */
0, 0, 0, FOCUS_PF2, FOCUS_PF9, 0, 0, FOCUS_PF3, /* 0x70-0x77 */
FOCUS_PF4, FOCUS_PF5, FOCUS_PF6, FOCUS_PF7, /* 0x78-0x7b */
FOCUS_PF8, JAP_86, FOCUS_PF10, 0 /* 0x7c-0x7f */
};
/* BTC */
#define E0_MACRO 112
/* LK450 */
#define E0_F13 113
#define E0_F14 114
#define E0_HELP 115
#define E0_DO 116
#define E0_F17 117
#define E0_KPMINPLUS 118
/*
* My OmniKey generates e0 4c for the "OMNI" key and the
* right alt key does nada. [kkoller@nyx10.cs.du.edu]
*/
#define E0_OK 124
/*
* New microsoft keyboard is rumoured to have
* e0 5b (left window button), e0 5c (right window button),
* e0 5d (menu button). [or: LBANNER, RBANNER, RMENU]
* [or: Windows_L, Windows_R, TaskMan]
*/
#define E0_MSLW 125
#define E0_MSRW 126
#define E0_MSTM 127
static unsigned char e0_keys[128] = {
0, 0, 0, 0, 0, 0, 0, 0, /* 0x00-0x07 */
0, 0, 0, 0, 0, 0, 0, 0, /* 0x08-0x0f */
0, 0, 0, 0, 0, 0, 0, 0, /* 0x10-0x17 */
0, 0, 0, 0, E0_KPENTER, E0_RCTRL, 0, 0, /* 0x18-0x1f */
0, 0, 0, 0, 0, 0, 0, 0, /* 0x20-0x27 */
0, 0, 0, 0, 0, 0, 0, 0, /* 0x28-0x2f */
0, 0, 0, 0, 0, E0_KPSLASH, 0, E0_PRSCR, /* 0x30-0x37 */
E0_RALT, 0, 0, 0, 0, E0_F13, E0_F14, E0_HELP, /* 0x38-0x3f */
E0_DO, E0_F17, 0, 0, 0, 0, E0_BREAK, E0_HOME, /* 0x40-0x47 */
E0_UP, E0_PGUP, 0, E0_LEFT, E0_OK, E0_RIGHT, E0_KPMINPLUS, E0_END,/* 0x48-0x4f */
E0_DOWN, E0_PGDN, E0_INS, E0_DEL, 0, 0, 0, 0, /* 0x50-0x57 */
0, 0, 0, E0_MSLW, E0_MSRW, E0_MSTM, 0, 0, /* 0x58-0x5f */
0, 0, 0, 0, 0, 0, 0, 0, /* 0x60-0x67 */
0, 0, 0, 0, 0, 0, 0, E0_MACRO, /* 0x68-0x6f */
0, 0, 0, 0, 0, 0, 0, 0, /* 0x70-0x77 */
0, 0, 0, 0, 0, 0, 0, 0 /* 0x78-0x7f */
};
#ifdef CONFIG_MAGIC_SYSRQ
u_char s3c_kbd_sysrq_xlate[128] =
"\000\0331234567890-=\177\t" /* 0x00 - 0x0f */
"qwertyuiop[]\r\000as" /* 0x10 - 0x1f */
"dfghjkl;'`\000\\zxcv" /* 0x20 - 0x2f */
"bnm,./\000*\000 \000\201\202\203\204\205" /* 0x30 - 0x3f */
"\206\207\210\211\212\000\000789-456+1" /* 0x40 - 0x4f */
"230\177\000\000\213\214\000\000\000\000\000\000\000\000\000\000" /* 0x50 - 0x5f */
"\r\000/"; /* 0x60 - 0x6f */
#endif
int s3c_kbd_setkeycode(u_int scancode, u_int keycode)
{
if (scancode < SC_LIM || scancode > 255 || keycode > 127)
return -EINVAL;
if (scancode < 128)
high_keys[scancode - SC_LIM] = keycode;
else
e0_keys[scancode - 128] = keycode;
return 0;
}
int s3c_kbd_getkeycode(u_int scancode)
{
return
(scancode < SC_LIM || scancode > 255) ? -EINVAL :
(scancode < 128) ? high_keys[scancode - SC_LIM] :
e0_keys[scancode - 128];
}
int s3c_kbd_translate(u_char scancode, u_char *keycode, char raw_mode)
{
*keycode = scancode & 0x7f;
return 1;
}
char s3c_kbd_unexpected_up(u_char keycode)
{
/* unexpected, but this can happen: maybe this was a key release for a
FOCUS 9000 PF key; if we want to see it, we have to clear up_flag */
if (keycode >= SC_LIM || keycode == 85)
return 0;
else
return 0200;
}
void s3c_kbd_leds(u_char leds)
{
}
extern int s3c2410_kbd_init(void);
int __init s3c2410_kbd_init(void)
{
int ret = -ENODEV;
ret = HW_kbd_init(s3c_keyb);
if (ret == 0) {
/* include/asm/keyboard.h , we have not key_ops_struct */
// k_setkeycode = s3c_kbd_setkeycode;
// k_getkeycode = s3c_kbd_getkeycode;
k_translate = s3c_kbd_translate;
k_unexpected_up = s3c_kbd_unexpected_up;
k_leds = s3c_kbd_leds;
#ifdef CONFIG_MAGIC_SYSRQ
k_sysrq_xlate = s3c_kbd_sysrq_xlate;
k_sysrq_key = 0x54;
#endif
}
return ret;
}
#endif /* CONFIG_VT */