#define timediff(now, start) \
((now.tv_sec - start.tv_sec) * 1000000 + now.tv_usec - start.tv_usec)
-static void do_exit(const char *msg)
+#define PBE2(p) ((*(p) << 8) | *(p+1))
+#define PBE3(p) ((*(p) << 16) | (*(p + 1) << 8) | *(p + 2))
+#define PBE4(p) ((*(p) << 24) | (*(p + 1) << 16) | (*(p + 2) << 8) | *(p + 3))
+
+static void do_exit(const char *msg, const char *where)
{
/* switch TL back to high */
outb(0xe0, PORT_CONTROL);
+ if (where)
+ fprintf(stderr, "%s: ", where);
if (msg)
- printf("%s", msg);
+ fprintf(stderr, "%s", msg);
exit(1);
}
static void inthandler(int u)
{
- do_exit("\n");
+ do_exit("\n", NULL);
}
-static void wait_th_low(void)
+static void wait_th_low(const char *where)
{
struct timeval start, now;
while (inb(PORT_STATUS) & 0x40) {
gettimeofday(&now, NULL);
if (timediff(now, start) > ACK_TIMEOUT)
- do_exit("timeout waiting TH low\n");
+ do_exit("timeout waiting TH low\n", where);
}
}
-static void wait_th_high(void)
+static void wait_th_high(const char *where)
{
struct timeval start, now;
while (!(inb(PORT_STATUS) & 0x40)) {
gettimeofday(&now, NULL);
if (timediff(now, start) > ACK_TIMEOUT)
- do_exit("timeout waiting TH high\n");
+ do_exit("timeout waiting TH high\n", where);
}
}
+static void output_to_input(void)
+{
+ /* TL high, recv mode; also give time
+ * MD to see TL before we lower it in recv_byte */
+ outb(0xe0, PORT_CONTROL);
+ usleep(4*10); /* must be at least 12+8+8 M68k cycles, 28/7.67M */
+}
+
+static void input_to_output(void)
+{
+ wait_th_low("input_to_output");
+ outb(0xc0, PORT_CONTROL); /* TL high, out mode */
+}
+
static unsigned int recv_byte(void)
{
unsigned int byte;
outb(0xe2, PORT_CONTROL); /* TL low */
- wait_th_low();
+ wait_th_low("recv_byte");
byte = inb(PORT_DATA) & 0x0f;
outb(0xe0, PORT_CONTROL); /* TL high */
- wait_th_high();
+ wait_th_high("recv_byte");
byte |= inb(PORT_DATA) << 4;
return byte;
}
+static void recv_bytes(unsigned char *b, size_t count)
+{
+ while (count-- > 0)
+ *b++ = recv_byte();
+}
+
static void send_byte(unsigned int byte)
{
- wait_th_low();
+ wait_th_low("recv_bytes");
outb(byte & 0x0f, PORT_DATA);
outb(0xc2, PORT_CONTROL); /* TL low */
- wait_th_high();
+ wait_th_high("recv_bytes");
outb((byte >> 4) & 0x0f, PORT_DATA);
outb(0xc0, PORT_CONTROL); /* TL high */
}
+static void send_bytes(unsigned char *b, size_t count)
+{
+ while (count-- > 0)
+ send_byte(*b++);
+}
+
static void send_cmd(unsigned int cmd)
{
send_byte(CMD_PREFIX);
int main(int argc, char *argv[])
{
- unsigned int addr = 0, size = 0, i = 0;
+ unsigned int addr = 0, size = 0;
+ unsigned int count = 0, i = 0;
int ret;
unsigned char *data;
FILE *file = NULL;
addr = atoi_or_die(argv[2]);
}
+ else if (strcmp(argv[1], "io") == 0)
+ {
+ unsigned int cmd = 0, value, iosize;
+ unsigned char *p = data;
+
+ for (i = 2; i < argc; ) {
+ if (argv[i][0] == 'r')
+ cmd = IOSEQ_R8;
+ else if (argv[i][0] == 'w')
+ cmd = IOSEQ_W8;
+ else
+ usage(argv[0]);
+
+ iosize = atoi_or_die(&argv[i][1]);
+ if (iosize == 32)
+ cmd += 2;
+ else if (iosize == 16)
+ cmd += 1;
+ else if (iosize != 8)
+ usage(argv[0]);
+ *p++ = cmd;
+ i++;
+
+ addr = atoi_or_die(argv[i]);
+ *p++ = addr >> 16;
+ *p++ = addr >> 8;
+ *p++ = addr >> 0;
+ i++;
+
+ if (cmd == IOSEQ_W8 || cmd == IOSEQ_W16 || cmd == IOSEQ_W32) {
+ value = atoi_or_die(argv[i]);
+ switch (iosize) {
+ case 32:
+ *p++ = value >> 24;
+ *p++ = value >> 16;
+ case 16:
+ *p++ = value >> 8;
+ case 8:
+ *p++ = value >> 0;
+ }
+ i++;
+ }
+
+ count++;
+ }
+ }
else
usage(argv[0]);
send_byte((size >> 16) & 0xff);
send_byte((size >> 8) & 0xff);
send_byte((size >> 0) & 0xff);
- outb(0xe0, PORT_CONTROL); /* TL high, recv mode */
+ output_to_input();
for (i = 0; i < size; i++)
{
send_byte((addr >> 8) & 0xff);
send_byte((addr >> 0) & 0xff);
}
+ else if (strcmp(argv[1], "io") == 0)
+ {
+ unsigned char *p = data;
+ unsigned char rdata[4];
+ send_cmd(CMD_IOSEQ);
+ send_byte((count >> 8) & 0xff);
+ send_byte((count >> 0) & 0xff);
+
+ for (; count > 0; count--) {
+ input_to_output();
+ send_bytes(p, 4); /* cmd + addr */
+
+ switch (p[0]) {
+ case IOSEQ_R8:
+ output_to_input();
+ recv_bytes(rdata, 1);
+ printf("r8 %06x %02x\n", PBE3(p + 1), rdata[0]);
+ p += 4;
+ break;
+ case IOSEQ_R16:
+ output_to_input();
+ recv_bytes(rdata, 2);
+ printf("r16 %06x %04x\n", PBE3(p + 1), PBE2(rdata));
+ p += 4;
+ break;
+ case IOSEQ_R32:
+ output_to_input();
+ recv_bytes(rdata, 4);
+ printf("r32 %06x %08x\n", PBE3(p + 1), PBE4(rdata));
+ p += 4;
+ break;
+ case IOSEQ_W8:
+ send_bytes(&p[4], 1);
+ printf("w8 %06x %02x\n", PBE3(p + 1), p[4]);
+ p += 5;
+ break;
+ case IOSEQ_W16:
+ send_bytes(&p[4], 2);
+ printf("w16 %06x %04x\n", PBE3(p + 1), PBE2(p + 4));
+ p += 6;
+ break;
+ case IOSEQ_W32:
+ send_bytes(&p[4], 4);
+ printf("w32 %06x %08x\n", PBE3(p + 1), PBE4(p + 4));
+ p += 8;
+ break;
+ default:
+ do_exit("error in ioseq data\n", NULL);
+ break;
+ }
+ }
+ }
if (file != NULL) {
printf("\b\b\b\b\b\b\b\b\b\b\b\b\b");
notaz.gp2x.de / megadrive.git / blobdiff