#include <stdio.h>
#include <stdlib.h>
+#include <string.h>
#include <unistd.h>
#include <sys/io.h>
#include <signal.h>
+#include <sys/time.h>
+
+#include "transfer.h"
/*
* PC:
* 7 TH --> 10 ACK
* 8 GND --- 21 GND
* 9 TR <-- 17 /SLCT_IN
+ *
+ * start: TH low/high, TL high
+ *
+ * TH low - lower nibble: MD ready to recv | MD sent to PC
+ * TL low - lower niblle: sent to MD | ready to recv from MD
+ * TH high - upper nibble: MD ready to recv | MD sent to PC
+ * TL high - upper nibble: sent | ready to recv from MD
*/
-static void inthandler(int u)
+#define ACK_TIMEOUT 2000000
+
+#define PORT_DATA 888
+#define PORT_STATUS 889
+#define PORT_CONTROL 890
+
+#define timediff(now, start) \
+ ((now.tv_sec - start.tv_sec) * 1000000 + now.tv_usec - start.tv_usec)
+
+static void do_exit(const char *msg)
{
/* switch TL back to high */
- outb(0xe0, 890);
- printf("\n");
+ outb(0xe0, PORT_CONTROL);
+
+ if (msg)
+ printf("%s", msg);
exit(1);
}
-int main(int argc, char *argv[])
+static void inthandler(int u)
{
- int size, byte, ret, i;
- unsigned char *data;
- char *p = NULL;
- FILE *file;
+ do_exit("\n");
+}
- if (argc != 4 || argv[1][0] != '-' || (argv[1][1] != 'r' && argv[1][1] != 'w')) {
- printf("usage:\n%s {-r,-w} <file> <size_hex>\n", argv[0]);
- return 1;
+static void wait_th_low(void)
+{
+ struct timeval start, now;
+
+ gettimeofday(&start, NULL);
+
+ while (inb(PORT_STATUS) & 0x40) {
+ gettimeofday(&now, NULL);
+ if (timediff(now, start) > ACK_TIMEOUT)
+ do_exit("timeout waiting TH low\n");
}
+}
- file = fopen(argv[2], argv[1][1] == 'r' ? "wb" : "rb");
- if (file == NULL) {
- fprintf(stderr, "can't open file: %s\n", argv[2]);
- return 1;
+static void wait_th_high(void)
+{
+ struct timeval start, now;
+
+ gettimeofday(&start, NULL);
+
+ while (!(inb(PORT_STATUS) & 0x40)) {
+ gettimeofday(&now, NULL);
+ if (timediff(now, start) > ACK_TIMEOUT)
+ do_exit("timeout waiting TH high\n");
}
+}
+
+static unsigned int recv_byte(void)
+{
+ unsigned int byte;
+
+ outb(0xe2, PORT_CONTROL); /* TL low */
+
+ wait_th_low();
+
+ byte = inb(PORT_DATA) & 0x0f;
+
+ outb(0xe0, PORT_CONTROL); /* TL high */
+
+ wait_th_high();
+
+ byte |= inb(PORT_DATA) << 4;
+
+ return byte;
+}
+
+static void send_byte(unsigned int byte)
+{
+ wait_th_low();
+
+ outb(byte & 0x0f, PORT_DATA);
+ outb(0xc2, PORT_CONTROL); /* TL low */
+
+ wait_th_high();
+
+ outb((byte >> 4) & 0x0f, PORT_DATA);
+ outb(0xc0, PORT_CONTROL); /* TL high */
+}
+
+static void send_cmd(unsigned int cmd)
+{
+ send_byte(CMD_PREFIX);
+ send_byte(cmd);
+}
+
+static void usage(const char *argv0)
+{
+ fprintf(stderr, "usage:\n%s <cmd> [args]\n"
+ "\tsend <file> <addr> [size]\n"
+ "\trecv <file> <addr> <size>\n", argv0);
+ exit(1);
+}
+
+static unsigned int atoi_or_die(const char *a)
+{
+ char *p = NULL;
+ unsigned int i;
- size = (int)strtoul(argv[3], &p, 16);
+ i = strtoul(a, &p, 0);
if (p == NULL || *p != 0) {
- fprintf(stderr, "can't convert size %s\n", argv[3]);
- return 1;
+ fprintf(stderr, "atoi: can't convert: %s\n", a);
+ exit(1);
}
- data = malloc(size);
+ return i;
+}
+
+int main(int argc, char *argv[])
+{
+ unsigned int addr = 0, size = 0, i = 0;
+ int ret;
+ unsigned char *data;
+ FILE *file = NULL;
+
+ if (argc < 2)
+ usage(argv[0]);
+
+ data = malloc(0x1000000);
if (data == NULL) {
- fprintf(stderr, "can't alloc %d bytes\n", size);
+ fprintf(stderr, "can't alloc %d bytes\n", 0x1000000);
return 1;
}
- ret = ioperm(888, 3, 1);
+ /* parse args, read files.. */
+ if (strcmp(argv[1], "send") == 0)
+ {
+ if (argc != 4 && argc != 5)
+ usage(argv[0]);
+
+ file = fopen(argv[2], "rb");
+ if (file == NULL) {
+ fprintf(stderr, "can't open file: %s\n", argv[2]);
+ return 1;
+ }
+
+ addr = atoi_or_die(argv[3]);
+ if (argv[4] == NULL) {
+ fseek(file, 0, SEEK_END);
+ size = ftell(file);
+ fseek(file, 0, SEEK_SET);
+ }
+ else
+ size = atoi_or_die(argv[4]);
+
+ ret = fread(data, 1, size, file);
+ if (ret != size) {
+ fprintf(stderr, "fread returned %d/%d\n", ret, size);
+ perror(NULL);
+ return 1;
+ }
+ }
+ else if (strcmp(argv[1], "recv") == 0)
+ {
+ if (argc != 5)
+ usage(argv[0]);
+
+ file = fopen(argv[2], "wb");
+ if (file == NULL) {
+ fprintf(stderr, "can't open file: %s\n", argv[2]);
+ return 1;
+ }
+
+ addr = atoi_or_die(argv[3]);
+ size = atoi_or_die(argv[4]);
+
+ memset(data, 0, size);
+ }
+ else
+ usage(argv[0]);
+
+ ret = ioperm(PORT_DATA, 3, 1);
if (ret != 0) {
perror("ioperm");
return 1;
signal(SIGINT, inthandler);
- printf("regs: %02x %02x %02x\n", inb(888), inb(889), inb(890));
- outb(0xe0, 890);
+ printf("regs: %02x %02x %02x\n",
+ inb(PORT_DATA), inb(PORT_STATUS), inb(PORT_CONTROL));
+ outb(0xe8, PORT_CONTROL); /* TR low - request for transfer */
- while (!(inb(889) & 0x40)) {
- printf("waiting for TH..\n");
- sleep(5);
- }
+ if (inb(PORT_STATUS) & 0x40)
+ printf("waiting for TH low..\n");
+ while (inb(PORT_STATUS) & 0x40)
+ sleep(1);
+
+ outb(0xe0, PORT_CONTROL);
- if (argv[1][1] == 'r')
+ if (strcmp(argv[1], "send") == 0)
{
+ printf("send %06x %06x\n", addr, size);
+ send_cmd(CMD_MD_SEND);
+ send_byte((addr >> 16) & 0xff);
+ send_byte((addr >> 8) & 0xff);
+ send_byte((addr >> 0) & 0xff);
+ send_byte((size >> 16) & 0xff);
+ send_byte((size >> 8) & 0xff);
+ send_byte((size >> 0) & 0xff);
+
for (i = 0; i < size; i++)
{
if ((i & 0xff) == 0) {
fflush(stdout);
}
- outb(0xe2, 890); /* TL low */
-
- /* wait for TH low */
- while (inb(889) & 0x40) ;
-
- byte = inb(888) & 0x0f;
-
- outb(0xe0, 890); /* TL high */
-
- /* wait for TH high */
- while (!(inb(889) & 0x40)) ;
-
- byte |= inb(888) << 4;
- data[i] = byte;
+ send_byte(data[i]);
}
-
- fwrite(data, 1, size, file);
}
- else
+ else if (strcmp(argv[1], "recv") == 0)
{
- ret = fread(data, 1, size, file);
- if (ret < size)
- printf("warning: read only %d/%d\n", ret, size);
-
- outb(0xc0, 890); /* out mode, TL hi */
- outb(data[0] & 0x0f, 888);
- outb(0xc2, 890); /* out mode, TL low (start condition) */
+ send_cmd(CMD_MD_RECV);
+ send_byte((addr >> 16) & 0xff);
+ send_byte((addr >> 8) & 0xff);
+ send_byte((addr >> 0) & 0xff);
+ send_byte((size >> 16) & 0xff);
+ send_byte((size >> 8) & 0xff);
+ send_byte((size >> 0) & 0xff);
+ outb(0xe0, PORT_CONTROL); /* TL high, recv mode */
for (i = 0; i < size; i++)
{
fflush(stdout);
}
- /* wait for TH low */
- while (inb(889) & 0x40) ;
-
- byte = data[i];
-
- outb(byte & 0x0f, 888);
- outb(0xc2, 890); /* TL low */
-
- /* wait for TH high */
- while (!(inb(889) & 0x40)) ;
-
- outb(byte >> 4, 888);
- outb(0xc0, 890); /* TL high */
+ data[i] = recv_byte();
}
+
+ fwrite(data, 1, size, file);
}
printf("\b\b\b\b\b\b\b\b\b\b\b\b\b");
printf("%06x/%06x\n", i, size);
fclose(file);
+ /* switch TL back to high, disable outputs */
+ outb(0xe0, PORT_CONTROL);
+
return 0;
}
notaz.gp2x.de / megadrive.git / blobdiff