+++ /dev/null
-/*
- * linux/drivers/char/ec3104_keyb.c
- *
- * Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
- *
- * based on linux/drivers/char/pc_keyb.c, which had the following comments:
- *
- * Separation of the PC low-level part by Geert Uytterhoeven, May 1997
- * See keyboard.c for the whole history.
- *
- * Major cleanup by Martin Mares, May 1997
- *
- * Combined the keyboard and PS/2 mouse handling into one file,
- * because they share the same hardware.
- * Johan Myreen <jem@iki.fi> 1998-10-08.
- *
- * Code fixes to handle mouse ACKs properly.
- * C. Scott Ananian <cananian@alumni.princeton.edu> 1999-01-29.
- */
-/* EC3104 note:
- * This code was written without any documentation about the EC3104 chip. While
- * I hope I got most of the basic functionality right, the register names I use
- * are most likely completely different from those in the chip documentation.
- *
- * If you have any further information about the EC3104, please tell me
- * (prumpf@tux.org).
- */
-
-
-#include <linux/spinlock.h>
-#include <linux/sched.h>
-#include <linux/interrupt.h>
-#include <linux/tty.h>
-#include <linux/mm.h>
-#include <linux/signal.h>
-#include <linux/init.h>
-#include <linux/kbd_ll.h>
-#include <linux/delay.h>
-#include <linux/random.h>
-#include <linux/poll.h>
-#include <linux/miscdevice.h>
-#include <linux/slab.h>
-#include <linux/kbd_kern.h>
-#include <linux/bitops.h>
-
-#include <asm/keyboard.h>
-#include <asm/uaccess.h>
-#include <asm/irq.h>
-#include <asm/system.h>
-#include <asm/ec3104.h>
-
-#include <asm/io.h>
-
-/* Some configuration switches are present in the include file... */
-
-#include <linux/pc_keyb.h>
-
-#define MSR_CTS 0x10
-#define MCR_RTS 0x02
-#define LSR_DR 0x01
-#define LSR_BOTH_EMPTY 0x60
-
-static struct e5_struct {
- u8 packet[8];
- int pos;
- int length;
-
- u8 cached_mcr;
- u8 last_msr;
-} ec3104_keyb;
-
-/* Simple translation table for the SysRq keys */
-
-
-#ifdef CONFIG_MAGIC_SYSRQ
-unsigned char ec3104_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
-
-static void kbd_write_command_w(int data);
-static void kbd_write_output_w(int data);
-#ifdef CONFIG_PSMOUSE
-static void aux_write_ack(int val);
-static void __aux_write_ack(int val);
-#endif
-
-static DEFINE_SPINLOCK(kbd_controller_lock);
-static unsigned char handle_kbd_event(void);
-
-/* used only by send_data - set by keyboard_interrupt */
-static volatile unsigned char reply_expected;
-static volatile unsigned char acknowledge;
-static volatile unsigned char resend;
-
-
-int ec3104_kbd_setkeycode(unsigned int scancode, unsigned int keycode)
-{
- return 0;
-}
-
-int ec3104_kbd_getkeycode(unsigned int scancode)
-{
- return 0;
-}
-
-
-/* yes, it probably would be faster to use an array. I don't care. */
-
-static inline unsigned char ec3104_scan2key(unsigned char scancode)
-{
- switch (scancode) {
- case 1: /* '`' */
- return 41;
-
- case 2 ... 27:
- return scancode;
-
- case 28: /* '\\' */
- return 43;
-
- case 29 ... 39:
- return scancode + 1;
-
- case 40: /* '\r' */
- return 28;
-
- case 41 ... 50:
- return scancode + 3;
-
- case 51: /* ' ' */
- return 57;
-
- case 52: /* escape */
- return 1;
-
- case 54: /* insert/delete (labelled delete) */
- /* this should arguably be 110, but I'd like to have ctrl-alt-del
- * working with a standard keymap */
- return 111;
-
- case 55: /* left */
- return 105;
- case 56: /* home */
- return 102;
- case 57: /* end */
- return 107;
- case 58: /* up */
- return 103;
- case 59: /* down */
- return 108;
- case 60: /* pgup */
- return 104;
- case 61: /* pgdown */
- return 109;
- case 62: /* right */
- return 106;
-
- case 79 ... 88: /* f1 - f10 */
- return scancode - 20;
-
- case 89 ... 90: /* f11 - f12 */
- return scancode - 2;
-
- case 91: /* left shift */
- return 42;
-
- case 92: /* right shift */
- return 54;
-
- case 93: /* left alt */
- return 56;
- case 94: /* right alt */
- return 100;
- case 95: /* left ctrl */
- return 29;
- case 96: /* right ctrl */
- return 97;
-
- case 97: /* caps lock */
- return 58;
- case 102: /* left windows */
- return 125;
- case 103: /* right windows */
- return 126;
-
- case 106: /* Fn */
- /* this is wrong. */
- return 84;
-
- default:
- return 0;
- }
-}
-
-int ec3104_kbd_translate(unsigned char scancode, unsigned char *keycode,
- char raw_mode)
-{
- scancode &= 0x7f;
-
- *keycode = ec3104_scan2key(scancode);
-
- return 1;
-}
-
-char ec3104_kbd_unexpected_up(unsigned char keycode)
-{
- return 0200;
-}
-
-static inline void handle_keyboard_event(unsigned char scancode)
-{
-#ifdef CONFIG_VT
- handle_scancode(scancode, !(scancode & 0x80));
-#endif
- tasklet_schedule(&keyboard_tasklet);
-}
-
-void ec3104_kbd_leds(unsigned char leds)
-{
-}
-
-static u8 e5_checksum(u8 *packet, int count)
-{
- int i;
- u8 sum = 0;
-
- for (i=0; i<count; i++)
- sum ^= packet[i];
-
- if (sum & 0x80)
- sum ^= 0xc0;
-
- return sum;
-}
-
-static void e5_wait_for_cts(struct e5_struct *k)
-{
- u8 msr;
-
- do {
- msr = ctrl_inb(EC3104_SER4_MSR);
- } while (!(msr & MSR_CTS));
-}
-
-
-static void e5_send_byte(u8 byte, struct e5_struct *k)
-{
- u8 status;
-
- do {
- status = ctrl_inb(EC3104_SER4_LSR);
- } while ((status & LSR_BOTH_EMPTY) != LSR_BOTH_EMPTY);
-
- printk("<%02x>", byte);
-
- ctrl_outb(byte, EC3104_SER4_DATA);
-
- do {
- status = ctrl_inb(EC3104_SER4_LSR);
- } while ((status & LSR_BOTH_EMPTY) != LSR_BOTH_EMPTY);
-
-}
-
-static int e5_send_packet(u8 *packet, int count, struct e5_struct *k)
-{
- int i;
-
- disable_irq(EC3104_IRQ_SER4);
-
- if (k->cached_mcr & MCR_RTS) {
- printk("e5_send_packet: too slow\n");
- enable_irq(EC3104_IRQ_SER4);
- return -EAGAIN;
- }
-
- k->cached_mcr |= MCR_RTS;
- ctrl_outb(k->cached_mcr, EC3104_SER4_MCR);
-
- e5_wait_for_cts(k);
-
- printk("p: ");
-
- for(i=0; i<count; i++)
- e5_send_byte(packet[i], k);
-
- e5_send_byte(e5_checksum(packet, count), k);
-
- printk("\n");
-
- udelay(1500);
-
- k->cached_mcr &= ~MCR_RTS;
- ctrl_outb(k->cached_mcr, EC3104_SER4_MCR);
-
- set_current_state(TASK_UNINTERRUPTIBLE);
-
-
-
- enable_irq(EC3104_IRQ_SER4);
-
-
-
- return 0;
-}
-
-/*
- * E5 packets we know about:
- * E5->host 0x80 0x05 <checksum> - resend packet
- * host->E5 0x83 0x43 <contrast> - set LCD contrast
- * host->E5 0x85 0x41 0x02 <brightness> 0x02 - set LCD backlight
- * E5->host 0x87 <ps2 packet> 0x00 <checksum> - external PS2
- * E5->host 0x88 <scancode> <checksum> - key press
- */
-
-static void e5_receive(struct e5_struct *k)
-{
- k->packet[k->pos++] = ctrl_inb(EC3104_SER4_DATA);
-
- if (k->pos == 1) {
- switch(k->packet[0]) {
- case 0x80:
- k->length = 3;
- break;
-
- case 0x87: /* PS2 ext */
- k->length = 6;
- break;
-
- case 0x88: /* keyboard */
- k->length = 3;
- break;
-
- default:
- k->length = 1;
- printk(KERN_WARNING "unknown E5 packet %02x\n",
- k->packet[0]);
- }
- }
-
- if (k->pos == k->length) {
- int i;
-
- if (e5_checksum(k->packet, k->length) != 0)
- printk(KERN_WARNING "E5: wrong checksum\n");
-
-#if 0
- printk("E5 packet [");
- for(i=0; i<k->length; i++) {
- printk("%02x ", k->packet[i]);
- }
-
- printk("(%02x)]\n", e5_checksum(k->packet, k->length-1));
-#endif
-
- switch(k->packet[0]) {
- case 0x80:
- case 0x88:
- handle_keyboard_event(k->packet[1]);
- break;
- }
-
- k->pos = k->length = 0;
- }
-}
-
-static void ec3104_keyb_interrupt(int irq, void *data)
-{
- struct e5_struct *k = &ec3104_keyb;
- u8 msr, lsr;
-
- msr = ctrl_inb(EC3104_SER4_MSR);
-
- if ((msr & MSR_CTS) && !(k->last_msr & MSR_CTS)) {
- if (k->cached_mcr & MCR_RTS)
- printk("confused: RTS already high\n");
- /* CTS went high. Send RTS. */
- k->cached_mcr |= MCR_RTS;
-
- ctrl_outb(k->cached_mcr, EC3104_SER4_MCR);
- } else if ((!(msr & MSR_CTS)) && (k->last_msr & MSR_CTS)) {
- /* CTS went low. */
- if (!(k->cached_mcr & MCR_RTS))
- printk("confused: RTS already low\n");
-
- k->cached_mcr &= ~MCR_RTS;
-
- ctrl_outb(k->cached_mcr, EC3104_SER4_MCR);
- }
-
- k->last_msr = msr;
-
- lsr = ctrl_inb(EC3104_SER4_LSR);
-
- if (lsr & LSR_DR)
- e5_receive(k);
-}
-
-static void ec3104_keyb_clear_state(void)
-{
- struct e5_struct *k = &ec3104_keyb;
- u8 msr, lsr;
-
- /* we want CTS to be low */
- k->last_msr = 0;
-
- for (;;) {
- msleep(100);
-
- msr = ctrl_inb(EC3104_SER4_MSR);
-
- lsr = ctrl_inb(EC3104_SER4_LSR);
-
- if (lsr & LSR_DR) {
- e5_receive(k);
- continue;
- }
-
- if ((msr & MSR_CTS) && !(k->last_msr & MSR_CTS)) {
- if (k->cached_mcr & MCR_RTS)
- printk("confused: RTS already high\n");
- /* CTS went high. Send RTS. */
- k->cached_mcr |= MCR_RTS;
-
- ctrl_outb(k->cached_mcr, EC3104_SER4_MCR);
- } else if ((!(msr & MSR_CTS)) && (k->last_msr & MSR_CTS)) {
- /* CTS went low. */
- if (!(k->cached_mcr & MCR_RTS))
- printk("confused: RTS already low\n");
-
- k->cached_mcr &= ~MCR_RTS;
-
- ctrl_outb(k->cached_mcr, EC3104_SER4_MCR);
- } else
- break;
-
- k->last_msr = msr;
-
- continue;
- }
-}
-
-void __init ec3104_kbd_init_hw(void)
-{
- ec3104_keyb.last_msr = ctrl_inb(EC3104_SER4_MSR);
- ec3104_keyb.cached_mcr = ctrl_inb(EC3104_SER4_MCR);
-
- ec3104_keyb_clear_state();
-
- /* Ok, finally allocate the IRQ, and off we go.. */
- request_irq(EC3104_IRQ_SER4, ec3104_keyb_interrupt, 0, "keyboard", NULL);
-}
projects / linux-beck.git / commitdiff