keyboard support (Blue Swirl)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1346 c046a42c-6fe2-441c-8c8c-71466251a162

hw/slavio_serial.c

@@ -1,7 +1,7 @@
 /*
  * QEMU Sparc SLAVIO serial port emulation
  * 
- * Copyright (c) 2003-2004 Fabrice Bellard
+ * Copyright (c) 2003-2005 Fabrice Bellard
  * 
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -22,13 +22,13 @@
  * THE SOFTWARE.
  */
 #include "vl.h"
-
+/* debug serial */
 //#define DEBUG_SERIAL
 
 /* debug keyboard */
 //#define DEBUG_KBD
 
-/* debug keyboard : only mouse */
+/* debug mouse */
 //#define DEBUG_MOUSE
 
 /*
@@ -42,11 +42,49 @@
  *
  */
 
+#ifdef DEBUG_SERIAL
+#define SER_DPRINTF(fmt, args...) \
+do { printf("SER: " fmt , ##args); } while (0)
+#else
+#define SER_DPRINTF(fmt, args...)
+#endif
+#ifdef DEBUG_KBD
+#define KBD_DPRINTF(fmt, args...) \
+do { printf("KBD: " fmt , ##args); } while (0)
+#else
+#define KBD_DPRINTF(fmt, args...)
+#endif
+#ifdef DEBUG_MOUSE
+#define MS_DPRINTF(fmt, args...) \
+do { printf("SER: " fmt , ##args); } while (0)
+#else
+#define MS_DPRINTF(fmt, args...)
+#endif
+
+typedef enum {
+    chn_a, chn_b,
+} chn_id_t;
+
+typedef enum {
+    ser, kbd, mouse,
+} chn_type_t;
+
+#define KBD_QUEUE_SIZE 256
+
+typedef struct {
+    uint8_t data[KBD_QUEUE_SIZE];
+    int rptr, wptr, count;
+} KBDQueue;
+
 typedef struct ChannelState {
     int irq;
     int reg;
     int rxint, txint;
+    chn_id_t chn; // this channel, A (base+4) or B (base+0)
+    chn_type_t type;
+    struct ChannelState *otherchn;
     uint8_t rx, tx, wregs[16], rregs[16];
+    KBDQueue queue;
     CharDriverState *chr;
 } ChannelState;
 
@@ -56,6 +94,45 @@ struct SerialState {
 
 #define SERIAL_MAXADDR 7
 
+static void handle_kbd_command(ChannelState *s, int val);
+static int serial_can_receive(void *opaque);
+static void serial_receive_byte(ChannelState *s, int ch);
+
+static void put_queue(void *opaque, int b)
+{
+    ChannelState *s = opaque;
+    KBDQueue *q = &s->queue;
+
+    KBD_DPRINTF("put: 0x%02x\n", b);
+    if (q->count >= KBD_QUEUE_SIZE)
+        return;
+    q->data[q->wptr] = b;
+    if (++q->wptr == KBD_QUEUE_SIZE)
+        q->wptr = 0;
+    q->count++;
+    serial_receive_byte(s, 0);
+}
+
+static uint32_t get_queue(void *opaque)
+{
+    ChannelState *s = opaque;
+    KBDQueue *q = &s->queue;
+    int val;
+    
+    if (q->count == 0) {
+	return 0;
+    } else {
+        val = q->data[q->rptr];
+        if (++q->rptr == KBD_QUEUE_SIZE)
+            q->rptr = 0;
+        q->count--;
+    }
+    KBD_DPRINTF("get 0x%02x\n", val);
+    if (q->count > 0)
+	serial_receive_byte(s, 0);
+    return val;
+}
+
 static void slavio_serial_update_irq(ChannelState *s)
 {
     if ((s->wregs[1] & 1) && // interrupts enabled
@@ -110,6 +187,7 @@ static void slavio_serial_mem_writeb(void *opaque, target_phys_addr_t addr, uint
     s = &ser->chn[channel];
     switch (saddr) {
     case 0:
+	SER_DPRINTF("Write channel %c, reg[%d] = %2.2x\n", channel? 'b' : 'a', s->reg, val & 0xff);
 	newreg = 0;
 	switch (s->reg) {
 	case 0:
@@ -158,11 +236,23 @@ static void slavio_serial_mem_writeb(void *opaque, target_phys_addr_t addr, uint
 	    s->reg = 0;
 	break;
     case 1:
+	SER_DPRINTF("Write channel %c, ch %d\n", channel? 'b' : 'a', val);
 	if (s->wregs[5] & 8) { // tx enabled
 	    s->tx = val;
 	    if (s->chr)
 		qemu_chr_write(s->chr, &s->tx, 1);
+	    else if (s->type == kbd) {
+		handle_kbd_command(s, val);
+	    }
 	    s->txint = 1;
+	    s->rregs[0] |= 4;
+	    // Interrupts reported only on channel A
+	    if (s->chn == 0)
+		s->rregs[3] |= 0x10;
+	    else {
+		s->otherchn->rregs[3] |= 2;
+	    }
+	    slavio_serial_update_irq(s);
 	}
 	break;
     default:
@@ -183,12 +273,18 @@ static uint32_t slavio_serial_mem_readb(void *opaque, target_phys_addr_t addr)
     s = &ser->chn[channel];
     switch (saddr) {
     case 0:
+	SER_DPRINTF("Read channel %c, reg[%d] = %2.2x\n", channel? 'b' : 'a', s->reg, s->rregs[s->reg]);
 	ret = s->rregs[s->reg];
 	s->reg = 0;
 	return ret;
     case 1:
+	SER_DPRINTF("Read channel %c, ch %d\n", channel? 'b' : 'a', s->rx);
 	s->rregs[0] &= ~1;
-	return s->rx;
+	if (s->type == kbd)
+	    ret = get_queue(s);
+	else
+	    ret = s->rx;
+	return ret;
     default:
 	break;
     }
@@ -208,6 +304,12 @@ static int serial_can_receive(void *opaque)
 static void serial_receive_byte(ChannelState *s, int ch)
 {
     s->rregs[0] |= 1;
+    // Interrupts reported only on channel A
+    if (s->chn == 0)
+	s->rregs[3] |= 0x20;
+    else {
+	s->otherchn->rregs[3] |= 4;
+    }
     s->rx = ch;
     s->rxint = 1;
     slavio_serial_update_irq(s);
@@ -295,39 +397,73 @@ static int slavio_serial_load(QEMUFile *f, void *opaque, int version_id)
 
 SerialState *slavio_serial_init(int base, int irq, CharDriverState *chr1, CharDriverState *chr2)
 {
-    int slavio_serial_io_memory;
+    int slavio_serial_io_memory, i;
     SerialState *s;
 
     s = qemu_mallocz(sizeof(SerialState));
     if (!s)
         return NULL;
-    s->chn[0].irq = irq;
-    s->chn[1].irq = irq;
-    s->chn[0].chr = chr1;
-    s->chn[1].chr = chr2;
 
     slavio_serial_io_memory = cpu_register_io_memory(0, slavio_serial_mem_read, slavio_serial_mem_write, s);
     cpu_register_physical_memory(base, SERIAL_MAXADDR, slavio_serial_io_memory);
 
-    if (chr1) {
+    s->chn[0].chr = chr1;
-	qemu_chr_add_read_handler(chr1, serial_can_receive, serial_receive1, &s->chn[0]);
+    s->chn[1].chr = chr2;
-	qemu_chr_add_event_handler(chr1, serial_event);
+
-    }
+    for (i = 0; i < 2; i++) {
-    if (chr2) {
+	s->chn[i].irq = irq;
-	qemu_chr_add_read_handler(chr2, serial_can_receive, serial_receive1, &s->chn[1]);
+	s->chn[i].chn = 1 - i;
-	qemu_chr_add_event_handler(chr2, serial_event);
+	s->chn[i].type = ser;
+	if (s->chn[i].chr) {
+	    qemu_chr_add_read_handler(s->chn[i].chr, serial_can_receive, serial_receive1, &s->chn[i]);
+	    qemu_chr_add_event_handler(s->chn[i].chr, serial_event);
+	}
     }
+    s->chn[0].otherchn = &s->chn[1];
+    s->chn[1].otherchn = &s->chn[0];
     register_savevm("slavio_serial", base, 1, slavio_serial_save, slavio_serial_load, s);
     qemu_register_reset(slavio_serial_reset, s);
     slavio_serial_reset(s);
     return s;
 }
 
+static const uint8_t keycodes[128] = {
+    127, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 43, 53,
+    54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 89, 76, 77, 78,
+    79, 80, 81, 82, 83, 84, 85, 86, 87, 42, 99, 88, 100, 101, 102, 103,
+    104, 105, 106, 107, 108, 109, 110, 47, 19, 121, 119, 5, 6, 8, 10, 12,
+    14, 16, 17, 18, 7, 98, 23, 68, 69, 70, 71, 91, 92, 93, 125, 112,
+    113, 114, 94, 50, 0, 0, 124, 9, 11, 0, 0, 0, 0, 0, 0, 0,
+    90, 0, 46, 22, 13, 111, 52, 20, 96, 24, 28, 74, 27, 123, 44, 66,
+    0, 45, 2, 4, 48, 0, 0, 21, 0, 0, 0, 0, 0, 120, 122, 67,
+};
+
 static void sunkbd_event(void *opaque, int ch)
 {
     ChannelState *s = opaque;
-    // XXX: PC -> Sun Type 5 translation?
+    int release = ch & 0x80;
-    serial_receive_byte(s, ch);
+
+    ch = keycodes[ch & 0x7f];
+    KBD_DPRINTF("Keycode %d (%s)\n", ch, release? "release" : "press");
+    put_queue(s, ch | release);
+}
+
+static void handle_kbd_command(ChannelState *s, int val)
+{
+    KBD_DPRINTF("Command %d\n", val);
+    switch (val) {
+    case 1: // Reset, return type code
+	put_queue(s, 0xff);
+	put_queue(s, 0xff);
+	put_queue(s, 5); // Type 5
+	break;
+    case 7: // Query layout
+	put_queue(s, 0xfe);
+	put_queue(s, 0x20); // XXX, layout?
+	break;
+    default:
+	break;
+    }
 }
 
 static void sunmouse_event(void *opaque, 
@@ -343,22 +479,27 @@ static void sunmouse_event(void *opaque,
 
 void slavio_serial_ms_kbd_init(int base, int irq)
 {
-    int slavio_serial_io_memory;
+    int slavio_serial_io_memory, i;
     SerialState *s;
 
     s = qemu_mallocz(sizeof(SerialState));
     if (!s)
         return;
-    s->chn[0].irq = irq;
+    for (i = 0; i < 2; i++) {
-    s->chn[1].irq = irq;
+	s->chn[i].irq = irq;
-    s->chn[0].chr = NULL;
+	s->chn[i].chn = 1 - i;
-    s->chn[1].chr = NULL;
+	s->chn[i].chr = NULL;
+    }
+    s->chn[0].otherchn = &s->chn[1];
+    s->chn[1].otherchn = &s->chn[0];
+    s->chn[0].type = mouse;
+    s->chn[1].type = kbd;
 
     slavio_serial_io_memory = cpu_register_io_memory(0, slavio_serial_mem_read, slavio_serial_mem_write, s);
     cpu_register_physical_memory(base, SERIAL_MAXADDR, slavio_serial_io_memory);
 
-    qemu_add_kbd_event_handler(sunkbd_event, &s->chn[0]);
+    qemu_add_mouse_event_handler(sunmouse_event, &s->chn[0]);
-    qemu_add_mouse_event_handler(sunmouse_event, &s->chn[1]);
+    qemu_add_kbd_event_handler(sunkbd_event, &s->chn[1]);
     qemu_register_reset(slavio_serial_reset, s);
     slavio_serial_reset(s);
 }