summaryrefslogtreecommitdiff
path: root/avr/z180-serv.c
diff options
context:
space:
mode:
Diffstat (limited to 'avr/z180-serv.c')
-rw-r--r--avr/z180-serv.c455
1 files changed, 426 insertions, 29 deletions
diff --git a/avr/z180-serv.c b/avr/z180-serv.c
index e3bca16..69bcd9c 100644
--- a/avr/z180-serv.c
+++ b/avr/z180-serv.c
@@ -1,27 +1,32 @@
+/*
+ * (C) Copyright 2014 Leo C. <erbl259-lmu@yahoo.de>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
#include "common.h"
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
#include <util/atomic.h>
#include "background.h"
+#include "env.h"
+#include "ff.h"
#include "serial.h"
#include "z80-if.h"
#include "debug.h"
+#include "print-utils.h"
#include "z180-serv.h"
+#include "timer.h"
+#include "time.h"
+#include "bcd.h"
+#include "rtc.h"
+#define DEBUG_CPM_SDIO 0 /* set to 1 to debug */
-
-/*--------------------------------------------------------------------------*/
-
-
-uint8_t z80_get_byte(uint32_t adr)
-{
- uint8_t data;
-
- z80_bus_cmd(Request);
- data = z80_read(adr);
- z80_bus_cmd(Release);
-
- return data;
-}
+#define debug_cpmsd(fmt, args...) \
+ debug_cond(DEBUG_CPM_SDIO, fmt, ##args)
/*--------------------------------------------------------------------------*/
@@ -48,6 +53,25 @@ uint32_t msg_to_addr(uint8_t *msg)
}
+static int msg_xmit_header(uint8_t func, uint8_t subf, int len)
+{
+ z80_memfifo_putc(fifo_msgout, 0xAE);
+ z80_memfifo_putc(fifo_msgout, len+2);
+ z80_memfifo_putc(fifo_msgout, func);
+ z80_memfifo_putc(fifo_msgout, subf);
+
+ return 0;
+}
+
+int msg_xmit(uint8_t func, uint8_t subf, int len, uint8_t *msg)
+{
+ msg_xmit_header(func, subf, len);
+ while (len--)
+ z80_memfifo_putc(fifo_msgout, *msg++);
+
+ return 0;
+}
+
void do_msg_ini_memfifo(uint8_t subf, int len, uint8_t * msg)
{
(void)len;
@@ -64,6 +88,356 @@ void do_msg_char_out(uint8_t subf, int len, uint8_t * msg)
putchar(*msg++);
}
+/* echo message */
+void do_msg_echo(uint8_t subf, int len, uint8_t * msg)
+{
+ (void)subf;
+
+ /* send re-echo */
+ msg_xmit(1, 3, len, msg);
+}
+
+/* get timer */
+void do_msg_get_timer(uint8_t subf, int len, uint8_t * msg)
+{
+ uint32_t time_ms = (len >= 4) ? *(uint32_t *) msg : 0;
+
+ time_ms = get_timer(time_ms);
+ msg_xmit(3, subf, sizeof(time_ms), (uint8_t *) &time_ms);
+}
+
+/* ---------------------------------------------------------------------------*/
+
+#define CPM_DAY_OFFSET ((1978-1900) * 365 + 19) /* 19 leap years */
+
+/*
+ * Convert CP/M time stamp to a broken-down time structure
+ *
+ */
+int mk_date_time (int len, uint8_t *msg, struct tm *tmp)
+{
+ time_t stamp;
+
+ if (len != 5)
+ return -1;
+
+ /* days since 2000-01-01 */
+ long days = msg[3] + (msg[4] << 8) - 8036;
+
+ if (days < 0)
+ return -1;
+
+ stamp = days * ONE_DAY;
+ stamp += bcd2bin(msg[0]);
+ stamp += bcd2bin(msg[1]) * 60 ;
+ stamp += bcd2bin(msg[2]) * 3600L;
+ gmtime_r(&stamp, tmp);
+ return 0;
+}
+
+void mk_cpm_time(struct tm *tmp, uint8_t cpm_time[5])
+{
+ uint16_t days = 1;
+ uint_fast8_t leap=2;
+
+ for (int year=78; year < tmp->tm_year; year++) {
+ days = days + 365 + (leap == 0);
+ leap = (leap+1)%4;
+ }
+ days += tmp->tm_yday;
+
+ cpm_time[0] = bin2bcd(tmp->tm_sec);
+ cpm_time[1] = bin2bcd(tmp->tm_min);
+ cpm_time[2] = bin2bcd(tmp->tm_hour);
+ cpm_time[3] = days;
+ cpm_time[4] = days >> 8;
+}
+
+/* get/set cp/m time */
+void do_msg_get_set_time(uint8_t subf, int len, uint8_t * msg)
+{
+ struct tm t;
+ uint8_t cpm_time[5];
+ int rc;
+
+ memset(cpm_time, 0, ARRAY_SIZE(cpm_time));
+
+ switch (subf) {
+ case 3: /* set date & time */
+ /* initialize t with current time */
+ rc = rtc_get (&t);
+
+ if (rc == 0) {
+ /* insert new date & time */
+ if (mk_date_time (len, msg, &t) != 0) {
+ my_puts_P(PSTR("## set_time: Bad date format\n"));
+ break;
+ }
+
+ time_t time;
+ time = mk_gmtime(&t);
+ gmtime_r(&time, &t);
+
+ /* and write to RTC */
+ rc = rtc_set (&t);
+ if(rc)
+ my_puts_P(PSTR("## set_time: Set date failed\n"));
+ } else {
+ my_puts_P(PSTR("## set_time: Get date failed\n"));
+ }
+ /* FALL TROUGH */
+ case 2: /* get date & time */
+ rc = rtc_get (&t);
+
+ if (rc) {
+ my_puts_P(PSTR("## get_time: Get date failed\n"));
+ break;
+ }
+
+ time_t time;
+ time = mk_gmtime(&t);
+ //mktime(&t);
+ gmtime_r(&time, &t);
+
+
+ mk_cpm_time(&t, cpm_time);
+ break;
+ }
+
+ msg_xmit(3, subf, sizeof(cpm_time), cpm_time);
+}
+
+/* ---------------------------------------------------------------------------*/
+
+#define MAX_DRIVE 4
+#define BLOCK_SIZE 512
+//#define TPA_BASE 0x10000
+//#define COMMON_BASE 0xC000
+
+struct cpm_drive_s {
+ uint8_t drv;
+ uint8_t device;
+ char *img_name;
+ bool dirty;
+ FIL fd;
+};
+
+static uint8_t disk_buffer[BLOCK_SIZE];
+static struct cpm_drive_s drv_table[MAX_DRIVE];
+static int handle_cpm_drv_to;
+
+#define f_dirty(fp) ((fp)->fs->wflag != 0)
+
+
+int cpm_drv_to(int state)
+{
+ static uint32_t ts;
+
+ switch(state) {
+ case 0:
+ break;
+
+ case 1:
+ ts = get_timer(0);
+ state = 2;
+ break;
+
+ case 2:
+ if (get_timer(ts) > 1000) {
+ for (uint_fast8_t i=0; i < MAX_DRIVE; i++) {
+// if (&drv_table[i].fd && f_dirty(&drv_table[i].fd)) {
+ if (drv_table[i].dirty) {
+ f_sync(&drv_table[i].fd);
+ drv_table[i].dirty = false;
+ debug_cpmsd("## %7lu f_sync: %c:\n", get_timer(0), i+'A');
+ }
+ }
+ state = 0;
+ }
+ }
+ return state;
+}
+
+
+void msg_cpm_result(uint8_t subf, uint8_t rc, int res)
+{
+ uint8_t result_msg[3];
+
+ if (res)
+ rc |= 0x80;
+
+ result_msg[0] = rc;
+ result_msg[1] = res;
+ result_msg[2] = res >> 8;
+
+ if (rc) {
+ debug_cpmsd("###%7lu error rc: %.02x, res: %d\n", get_timer(0), rc, res);
+ }
+
+ msg_xmit(2, subf, sizeof(result_msg), result_msg);
+}
+
+/*
+ db 2 ; disk command
+ ds 1 ; subcommand (login/read/write)
+ ds 1 ; @adrv (8 bits) +0
+ ds 1 ; @rdrv (8 bits) +1
+ ds 3 ; @xdph (24 bits) +2
+*/
+
+void do_msg_cpm_login(uint8_t subf, int len, uint8_t * msg)
+{
+
+ FRESULT res = 0;
+ uint8_t drv;
+ char *np;
+
+ (void)subf;
+
+ if (len != 5) { /* TODO: check adrv, rdrv */
+ return msg_cpm_result(subf, 0x01, res);
+ }
+
+ debug_cpmsd("\n## %7lu login: %c:\n", get_timer(0), msg[0]+'A');
+
+
+ drv = msg[0];
+ if ( drv>= MAX_DRIVE) {
+ return msg_cpm_result(subf, 0x02, res);
+ }
+
+/*
+ uint32_t dph = ((uint32_t)msg[4] << 16) + ((uint16_t)msg[3] << 8) + msg[2];
+*/
+
+ if (drv_table[drv].img_name != NULL) {
+ debug_cpmsd("## %7lu close: '%s'\n", get_timer(0), drv_table[drv].img_name);
+ f_close(&drv_table[drv].fd);
+ drv_table[drv].dirty = false;
+ free(drv_table[drv].img_name);
+ drv_table[drv].img_name = NULL;
+ }
+
+ strcpy_P((char *)disk_buffer, PSTR("dsk0"));
+ disk_buffer[3] = msg[0] + '0';
+ if (((np = getenv((char*)disk_buffer)) == NULL) ||
+ ((drv_table[drv].img_name = strdup(np)) == NULL)) {
+ return msg_cpm_result(subf, 0x03, res);
+ }
+
+
+ res = f_open(&drv_table[drv].fd, drv_table[drv].img_name,
+ FA_WRITE | FA_READ);
+
+ debug_cpmsd("## %7lu open: '%s', (env: '%s'), res: %d\n", get_timer(0),
+ drv_table[drv].img_name, disk_buffer, res);
+
+ /* send result*/
+ msg_cpm_result(subf, 0x00, res);
+}
+
+
+/*
+ db 2 ; disk command
+ ds 1 ; subcommand (login/read/write)
+ ds 1 ; @adrv (8 bits) +0
+ ds 1 ; @rdrv (8 bits) +1
+ ds 2 ; @trk (16 bits) +2
+ ds 2 ; @sect(16 bits) +4
+ ds 1 ; @cnt (8 bits) +6
+ ds 3 ; phys. transfer addr +7
+*/
+
+#define ADRV 0
+#define RDRV 1
+#define TRK 2
+#define SEC 4
+#define CNT 6
+#define ADDR 7
+
+void do_msg_cpm_rw(uint8_t subf, int len, uint8_t * msg)
+{
+ uint8_t drv;
+ uint32_t addr;
+ uint32_t pos;
+ uint8_t secs;
+ bool dowrite = (subf == 2);
+ FRESULT res = 0;
+ uint8_t rc = 0;
+ bool buserr = 0;
+
+ if (len != 10) { /* TODO: check adrv, rdrv */
+ return msg_cpm_result(subf, 0x01, res);
+ }
+
+ drv = msg[ADRV];
+ if ( drv>= MAX_DRIVE) {
+ return msg_cpm_result(subf, 0x02, res);
+ }
+
+ secs = msg[CNT];
+ addr = ((uint32_t)msg[ADDR+2] << 16) + ((uint16_t)msg[ADDR+1] << 8) + msg[ADDR];
+
+
+ /* TODO: tracks per sector from dpb */
+ pos = (((uint16_t)(msg[TRK+1] << 8) + msg[TRK]) * 8
+ + ((uint32_t)(msg[SEC+1] << 8) + msg[SEC])) * BLOCK_SIZE;
+
+ debug_cpmsd("## %7lu cpm_rw: %s %c: trk:%4d, sec: %d, pos: %.8lx, secs: %2d, "
+ "addr: %.5lx\n", get_timer(0), dowrite ? "write" : " read",
+ msg[ADRV]+'A', ((uint16_t)(msg[TRK+1] << 8) + msg[TRK]), msg[SEC],
+ pos, msg[CNT], addr);
+
+ res = f_lseek(&drv_table[drv].fd, pos);
+ while (!res && secs--) {
+ unsigned int brw;
+ if (dowrite) {
+ if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) {
+ buserr = 1;
+ break;
+ } else {
+ z80_read_block(disk_buffer, addr, BLOCK_SIZE);
+ z80_bus_cmd(Release);
+ }
+ res = f_write(&drv_table[drv].fd, disk_buffer, BLOCK_SIZE, &brw);
+ } else {
+ res = f_read(&drv_table[drv].fd, disk_buffer, BLOCK_SIZE, &brw);
+ if (res == FR_OK && brw == BLOCK_SIZE) {
+ if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) {
+ buserr = 1;
+ break;
+ } else {
+ z80_write_block(disk_buffer, addr, BLOCK_SIZE);
+ z80_bus_cmd(Release);
+ }
+ }
+ }
+
+ if (brw != BLOCK_SIZE) {
+ debug_cpmsd("## %7lu f_read res: %d, bytes rd/wr: %u\n", get_timer(0), res, brw);
+ dump_ram(disk_buffer, 0, 64, "Read Data");
+ res = -1;
+ }
+
+ addr += BLOCK_SIZE;
+ }
+
+ if (dowrite && !res) {
+// res = f_sync(&drv_table[drv].fd);
+ drv_table[drv].dirty = true;
+ bg_setstat(handle_cpm_drv_to, 1);
+ }
+
+
+ if (buserr) {
+ debug_cpmsd("Bus timeout\n");
+ rc = 0x03;
+ }
+
+ /* send result*/
+ msg_cpm_result(subf, rc, res);
+}
+
const FLASH struct msg_item z80_messages[] =
{
@@ -73,6 +447,21 @@ const FLASH struct msg_item z80_messages[] =
{ 1,
1, 1,
do_msg_char_out},
+ { 1,
+ 2, 2,
+ do_msg_echo},
+ { 2,
+ 0, 0,
+ do_msg_cpm_login},
+ { 2,
+ 1, 2,
+ do_msg_cpm_rw},
+ { 3,
+ 1, 1,
+ do_msg_get_timer},
+ { 3,
+ 2, 3, /* 2: get, 3: set time and date */
+ do_msg_get_set_time},
{ 0xff, /* end mark */
0, 0,
0},
@@ -165,7 +554,7 @@ void check_msg_fifo(void)
int msg_handling(int state)
{
- uint8_t pending;
+ bool pending;
ATOMIC_BLOCK(ATOMIC_FORCEON) {
pending = (Stat & S_MSG_PENDING) != 0;
@@ -173,21 +562,27 @@ int msg_handling(int state)
}
if (pending) {
- switch (state) {
- case 0:
+ uint8_t init_request;
+ z80_bus_cmd(Request);
+ init_request = z80_read(0x43);
+ z80_bus_cmd(Release);
+ if ( init_request != 0) {
+ /* Get address of fifo 0 */
z80_bus_cmd(Request);
- uint32_t addr = z80_read(0x40) +
- ((uint16_t) z80_read(0x41) << 8) +
- ((uint32_t) z80_read(0x42) << 16);
+ uint32_t fifo_addr = z80_read(0x40) +
+ ((uint16_t) z80_read(0x40+1) << 8) +
+ ((uint32_t) z80_read(0x40+2) << 16);
+ z80_write(0x43, 0);
z80_bus_cmd(Release);
- if (addr != 0) {
- z80_memfifo_init(fifo_msgin, addr);
+
+ if (fifo_addr != 0) {
+ z80_memfifo_init(fifo_msgin, fifo_addr);
state = 1;
- }
- break;
- case 1:
+ } else
+ state = 0;
+
+ } else {
check_msg_fifo();
- break;
}
}
@@ -201,21 +596,22 @@ void setup_z180_serv(void)
{
handle_msg_handling = bg_register(msg_handling, 0);
+ handle_cpm_drv_to = bg_register(cpm_drv_to, 0);
}
void restart_z180_serv(void)
{
z80_bus_cmd(Request);
- z80_write(0x40, 0);
- z80_write(0x41, 0);
- z80_write(0x42, 0);
+ z80_memset(0x40, 0, 4);
z80_bus_cmd(Release);
for (int i = 0; i < NUM_FIFOS; i++)
z80_memfifo_init(i, 0);
bg_setstat(handle_msg_handling, 0);
+
}
+#if 0
/*--------------------------------------------------------------------------*/
const FLASH uint8_t iniprog[] = {
@@ -267,3 +663,4 @@ const FLASH uint8_t test1[] = {
0x00, // db 0 ;dst
0x00, 0x00, // dw 0 ;count (64k)
};
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-20 05:42:29 +0000