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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [char/] [ec3104_keyb.c] - Blame information for rev 1774

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/*
 * 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/config.h>
 
#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/smp_lock.h>
 
#include <asm/keyboard.h>
#include <asm/bitops.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 spinlock_t kbd_controller_lock = SPIN_LOCK_UNLOCKED;
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 pt_regs *regs)
{
        struct e5_struct *k = &ec3104_keyb;
        u8 msr, lsr;
 
        kbd_pt_regs = regs;
 
        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 (;;) {
                schedule_timeout(HZ/10);
 
                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);
}

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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [char/] [ec3104_keyb.c] - Blame information for rev 1774

Line No.	Rev	Author	Line
1	1275	phoenix	`/*`
2			`* linux/drivers/char/ec3104_keyb.c`
3			`*`
4			`* Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>`
5			`*`
6			`* based on linux/drivers/char/pc_keyb.c, which had the following comments:`
7			`*`
8			`* Separation of the PC low-level part by Geert Uytterhoeven, May 1997`
9			`* See keyboard.c for the whole history.`
10			`*`
11			`* Major cleanup by Martin Mares, May 1997`
12			`*`
13			`* Combined the keyboard and PS/2 mouse handling into one file,`
14			`* because they share the same hardware.`
15			`* Johan Myreen <jem@iki.fi> 1998-10-08.`
16			`*`
17			`* Code fixes to handle mouse ACKs properly.`
18			`* C. Scott Ananian <cananian@alumni.princeton.edu> 1999-01-29.`
19			`*/`
20			`/* EC3104 note:`
21			`* This code was written without any documentation about the EC3104 chip. While`
22			`* I hope I got most of the basic functionality right, the register names I use`
23			`* are most likely completely different from those in the chip documentation.`
24			`*`
25			`* If you have any further information about the EC3104, please tell me`
26			`* (prumpf@tux.org).`
27			`*/`
28
29			`#include <linux/config.h>`
30
31			`#include <linux/spinlock.h>`
32			`#include <linux/sched.h>`
33			`#include <linux/interrupt.h>`
34			`#include <linux/tty.h>`
35			`#include <linux/mm.h>`
36			`#include <linux/signal.h>`
37			`#include <linux/init.h>`
38			`#include <linux/kbd_ll.h>`
39			`#include <linux/delay.h>`
40			`#include <linux/random.h>`
41			`#include <linux/poll.h>`
42			`#include <linux/miscdevice.h>`
43			`#include <linux/slab.h>`
44			`#include <linux/kbd_kern.h>`
45			`#include <linux/smp_lock.h>`
46
47			`#include <asm/keyboard.h>`
48			`#include <asm/bitops.h>`
49			`#include <asm/uaccess.h>`
50			`#include <asm/irq.h>`
51			`#include <asm/system.h>`
52			`#include <asm/ec3104.h>`
53
54			`#include <asm/io.h>`
55
56			`/* Some configuration switches are present in the include file... */`
57
58			`#include <linux/pc_keyb.h>`
59
60			`#define MSR_CTS 0x10`
61			`#define MCR_RTS 0x02`
62			`#define LSR_DR 0x01`
63			`#define LSR_BOTH_EMPTY 0x60`
64
65			`static struct e5_struct {`
66			`u8 packet[8];`
67			`int pos;`
68			`int length;`
69
70			`u8 cached_mcr;`
71			`u8 last_msr;`
72			`} ec3104_keyb;`
73
74			`/* Simple translation table for the SysRq keys */`
75
76
77			`#ifdef CONFIG_MAGIC_SYSRQ`
78			`unsigned char ec3104_kbd_sysrq_xlate[128] =`
79			`"\000\0331234567890-=\177\t" /* 0x00 - 0x0f */`
80			`"qwertyuiop[]\r\000as" /* 0x10 - 0x1f */`
81			"dfghjkl;'`\000\\zxcv" /* 0x20 - 0x2f */
82			`"bnm,./\000\000 \000\201\202\203\204\205" / 0x30 - 0x3f */`
83			`"\206\207\210\211\212\000\000789-456+1" /* 0x40 - 0x4f */`
84			`"230\177\000\000\213\214\000\000\000\000\000\000\000\000\000\000" /* 0x50 - 0x5f */`
85			`"\r\000/"; /* 0x60 - 0x6f */`
86			`#endif`
87
88			`static void kbd_write_command_w(int data);`
89			`static void kbd_write_output_w(int data);`
90			`#ifdef CONFIG_PSMOUSE`
91			`static void aux_write_ack(int val);`
92			`static void __aux_write_ack(int val);`
93			`#endif`
94
95			`static spinlock_t kbd_controller_lock = SPIN_LOCK_UNLOCKED;`
96			`static unsigned char handle_kbd_event(void);`
97
98			`/* used only by send_data - set by keyboard_interrupt */`
99			`static volatile unsigned char reply_expected;`
100			`static volatile unsigned char acknowledge;`
101			`static volatile unsigned char resend;`
102
103
104			`int ec3104_kbd_setkeycode(unsigned int scancode, unsigned int keycode)`
105			`{`
106			`return 0;`
107			`}`
108
109			`int ec3104_kbd_getkeycode(unsigned int scancode)`
110			`{`
111			`return 0;`
112			`}`
113
114
115			`/* yes, it probably would be faster to use an array. I don't care. */`
116
117			`static inline unsigned char ec3104_scan2key(unsigned char scancode)`
118			`{`
119			`switch (scancode) {`
120			case 1: /* '`' */
121			`return 41;`
122
123			`case 2 ... 27:`
124			`return scancode;`
125
126			`case 28: /* '\\' */`
127			`return 43;`
128
129			`case 29 ... 39:`
130			`return scancode + 1;`
131
132			`case 40: /* '\r' */`
133			`return 28;`
134
135			`case 41 ... 50:`
136			`return scancode + 3;`
137
138			`case 51: /* ' ' */`
139			`return 57;`
140
141			`case 52: /* escape */`
142			`return 1;`
143
144			`case 54: /* insert/delete (labelled delete) */`
145			`/* this should arguably be 110, but I'd like to have ctrl-alt-del`
146			`* working with a standard keymap */`
147			`return 111;`
148
149			`case 55: /* left */`
150			`return 105;`
151			`case 56: /* home */`
152			`return 102;`
153			`case 57: /* end */`
154			`return 107;`
155			`case 58: /* up */`
156			`return 103;`
157			`case 59: /* down */`
158			`return 108;`
159			`case 60: /* pgup */`
160			`return 104;`
161			`case 61: /* pgdown */`
162			`return 109;`
163			`case 62: /* right */`
164			`return 106;`
165
166			`case 79 ... 88: /* f1 - f10 */`
167			`return scancode - 20;`
168
169			`case 89 ... 90: /* f11 - f12 */`
170			`return scancode - 2;`
171
172			`case 91: /* left shift */`
173			`return 42;`
174
175			`case 92: /* right shift */`
176			`return 54;`
177
178			`case 93: /* left alt */`
179			`return 56;`
180			`case 94: /* right alt */`
181			`return 100;`
182			`case 95: /* left ctrl */`
183			`return 29;`
184			`case 96: /* right ctrl */`
185			`return 97;`
186
187			`case 97: /* caps lock */`
188			`return 58;`
189			`case 102: /* left windows */`
190			`return 125;`
191			`case 103: /* right windows */`
192			`return 126;`
193
194			`case 106: /* Fn */`
195			`/* this is wrong. */`
196			`return 84;`
197
198			`default:`
199			`return 0;`
200			`}`
201			`}`
202
203			`int ec3104_kbd_translate(unsigned char scancode, unsigned char *keycode,`
204			`char raw_mode)`
205			`{`
206			`scancode &= 0x7f;`
207
208			`*keycode = ec3104_scan2key(scancode);`
209
210			`return 1;`
211			`}`
212
213			`char ec3104_kbd_unexpected_up(unsigned char keycode)`
214			`{`
215			`return 0200;`
216			`}`
217
218			`static inline void handle_keyboard_event(unsigned char scancode)`
219			`{`
220			`#ifdef CONFIG_VT`
221			`handle_scancode(scancode, !(scancode & 0x80));`
222			`#endif`
223			`tasklet_schedule(&keyboard_tasklet);`
224			`}`
225
226			`void ec3104_kbd_leds(unsigned char leds)`
227			`{`
228			`}`
229
230			`static u8 e5_checksum(u8 *packet, int count)`
231			`{`
232			`int i;`
233			`u8 sum = 0;`
234
235			`for (i=0; i<count; i++)`
236			`sum ^= packet[i];`
237
238			`if (sum & 0x80)`
239			`sum ^= 0xc0;`
240
241			`return sum;`
242			`}`
243
244			`static void e5_wait_for_cts(struct e5_struct *k)`
245			`{`
246			`u8 msr;`
247
248			`do {`
249			`msr = ctrl_inb(EC3104_SER4_MSR);`
250			`} while (!(msr & MSR_CTS));`
251			`}`
252
253
254			`static void e5_send_byte(u8 byte, struct e5_struct *k)`
255			`{`
256			`u8 status;`
257
258			`do {`
259			`status = ctrl_inb(EC3104_SER4_LSR);`
260			`} while ((status & LSR_BOTH_EMPTY) != LSR_BOTH_EMPTY);`
261
262			`printk("<%02x>", byte);`
263
264			`ctrl_outb(byte, EC3104_SER4_DATA);`
265
266			`do {`
267			`status = ctrl_inb(EC3104_SER4_LSR);`
268			`} while ((status & LSR_BOTH_EMPTY) != LSR_BOTH_EMPTY);`
269
270			`}`
271
272			`static int e5_send_packet(u8 packet, int count, struct e5_struct k)`
273			`{`
274			`int i;`
275
276			`disable_irq(EC3104_IRQ_SER4);`
277
278			`if (k->cached_mcr & MCR_RTS) {`
279			`printk("e5_send_packet: too slow\n");`
280			`enable_irq(EC3104_IRQ_SER4);`
281			`return -EAGAIN;`
282			`}`
283
284			`k->cached_mcr \|= MCR_RTS;`
285			`ctrl_outb(k->cached_mcr, EC3104_SER4_MCR);`
286
287			`e5_wait_for_cts(k);`
288
289			`printk("p: ");`
290
291			`for(i=0; i<count; i++)`
292			`e5_send_byte(packet[i], k);`
293
294			`e5_send_byte(e5_checksum(packet, count), k);`
295
296			`printk("\n");`
297
298			`udelay(1500);`
299
300			`k->cached_mcr &= ~MCR_RTS;`
301			`ctrl_outb(k->cached_mcr, EC3104_SER4_MCR);`
302
303			`set_current_state(TASK_UNINTERRUPTIBLE);`
304
305
306
307			`enable_irq(EC3104_IRQ_SER4);`
308
309
310
311			`return 0;`
312			`}`
313
314			`/*`
315			`* E5 packets we know about:`
316			`* E5->host 0x80 0x05 <checksum> - resend packet`
317			`* host->E5 0x83 0x43 <contrast> - set LCD contrast`
318			`* host->E5 0x85 0x41 0x02 <brightness> 0x02 - set LCD backlight`
319			`* E5->host 0x87 <ps2 packet> 0x00 <checksum> - external PS2`
320			`* E5->host 0x88 <scancode> <checksum> - key press`
321			`*/`
322
323			`static void e5_receive(struct e5_struct *k)`
324			`{`
325			`k->packet[k->pos++] = ctrl_inb(EC3104_SER4_DATA);`
326
327			`if (k->pos == 1) {`
328			`switch(k->packet[0]) {`
329			`case 0x80:`
330			`k->length = 3;`
331			`break;`
332
333			`case 0x87: /* PS2 ext */`
334			`k->length = 6;`
335			`break;`
336
337			`case 0x88: /* keyboard */`
338			`k->length = 3;`
339			`break;`
340
341			`default:`
342			`k->length = 1;`
343			`printk(KERN_WARNING "unknown E5 packet %02x\n",`
344			`k->packet[0]);`
345			`}`
346			`}`
347
348			`if (k->pos == k->length) {`
349			`int i;`
350
351			`if (e5_checksum(k->packet, k->length) != 0)`
352			`printk(KERN_WARNING "E5: wrong checksum\n");`
353
354			`#if 0`
355			`printk("E5 packet [");`
356			`for(i=0; i<k->length; i++) {`
357			`printk("%02x ", k->packet[i]);`
358			`}`
359
360			`printk("(%02x)]\n", e5_checksum(k->packet, k->length-1));`
361			`#endif`
362
363			`switch(k->packet[0]) {`
364			`case 0x80:`
365			`case 0x88:`
366			`handle_keyboard_event(k->packet[1]);`
367			`break;`
368			`}`
369
370			`k->pos = k->length = 0;`
371			`}`
372			`}`
373
374			`static void ec3104_keyb_interrupt(int irq, void data, struct pt_regs regs)`
375			`{`
376			`struct e5_struct *k = &ec3104_keyb;`
377			`u8 msr, lsr;`
378
379			`kbd_pt_regs = regs;`
380
381			`msr = ctrl_inb(EC3104_SER4_MSR);`
382
383			`if ((msr & MSR_CTS) && !(k->last_msr & MSR_CTS)) {`
384			`if (k->cached_mcr & MCR_RTS)`
385			`printk("confused: RTS already high\n");`
386			`/* CTS went high. Send RTS. */`
387			`k->cached_mcr \|= MCR_RTS;`
388
389			`ctrl_outb(k->cached_mcr, EC3104_SER4_MCR);`
390			`} else if ((!(msr & MSR_CTS)) && (k->last_msr & MSR_CTS)) {`
391			`/* CTS went low. */`
392			`if (!(k->cached_mcr & MCR_RTS))`
393			`printk("confused: RTS already low\n");`
394
395			`k->cached_mcr &= ~MCR_RTS;`
396
397			`ctrl_outb(k->cached_mcr, EC3104_SER4_MCR);`
398			`}`
399
400			`k->last_msr = msr;`
401
402			`lsr = ctrl_inb(EC3104_SER4_LSR);`
403
404			`if (lsr & LSR_DR)`
405			`e5_receive(k);`
406			`}`
407
408			`static void ec3104_keyb_clear_state(void)`
409			`{`
410			`struct e5_struct *k = &ec3104_keyb;`
411			`u8 msr, lsr;`
412
413			`/* we want CTS to be low */`
414			`k->last_msr = 0;`
415
416			`for (;;) {`
417			`schedule_timeout(HZ/10);`
418
419			`msr = ctrl_inb(EC3104_SER4_MSR);`
420
421			`lsr = ctrl_inb(EC3104_SER4_LSR);`
422
423			`if (lsr & LSR_DR) {`
424			`e5_receive(k);`
425			`continue;`
426			`}`
427
428			`if ((msr & MSR_CTS) && !(k->last_msr & MSR_CTS)) {`
429			`if (k->cached_mcr & MCR_RTS)`
430			`printk("confused: RTS already high\n");`
431			`/* CTS went high. Send RTS. */`
432			`k->cached_mcr \|= MCR_RTS;`
433
434			`ctrl_outb(k->cached_mcr, EC3104_SER4_MCR);`
435			`} else if ((!(msr & MSR_CTS)) && (k->last_msr & MSR_CTS)) {`
436			`/* CTS went low. */`
437			`if (!(k->cached_mcr & MCR_RTS))`
438			`printk("confused: RTS already low\n");`
439
440			`k->cached_mcr &= ~MCR_RTS;`
441
442			`ctrl_outb(k->cached_mcr, EC3104_SER4_MCR);`
443			`} else`
444			`break;`
445
446			`k->last_msr = msr;`
447
448			`continue;`
449			`}`
450			`}`
451
452			`void __init ec3104_kbd_init_hw(void)`
453			`{`
454			`ec3104_keyb.last_msr = ctrl_inb(EC3104_SER4_MSR);`
455			`ec3104_keyb.cached_mcr = ctrl_inb(EC3104_SER4_MCR);`
456
457			`ec3104_keyb_clear_state();`
458
459			`/* Ok, finally allocate the IRQ, and off we go.. */`
460			`request_irq(EC3104_IRQ_SER4, ec3104_keyb_interrupt, 0, "keyboard", NULL);`
461			`}`