[z180-stamp.git] / avr / z180-serv.c

/*
 * (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 */

#define debug_cpmsd(fmt, args...)		                                            \
	debug_cond(DEBUG_CPM_SDIO, fmt, ##args)


/*--------------------------------------------------------------------------*/


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;
}


/*--------------------------------------------------------------------------*/

struct msg_item {
	uint8_t fct;
	uint8_t sub_min, sub_max;
	void (*func)(uint8_t, int, uint8_t *);
};

uint32_t msg_to_addr(uint8_t *msg)
{
	union {
		uint32_t as32;
		uint8_t as8[4];
	} addr;

	addr.as8[0] = msg[0];
	addr.as8[1] = msg[1];
	addr.as8[2] = msg[2];
	addr.as8[3] = 0;

	return addr.as32;
}


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;

	z80_memfifo_init(subf, msg_to_addr(msg));
}


void do_msg_char_out(uint8_t subf, int len, uint8_t * msg)
{
	(void)subf;

	while (len--)
		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]) * 3600;
	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;

	debug("## mk_cpmtime: tm_year: %d, tm_yday: %d, days: %d\n",
	tmp->tm_year, tmp->tm_yday, days);
}

/* 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 cnt, br;

		/* check bank boundary crossing */
		cnt = 0;
		if (addr < (TPA_BASE + COMMON_BASE) &&
					(addr + BLOCK_SIZE) > (TPA_BASE + COMMON_BASE)) {
			cnt = (TPA_BASE + COMMON_BASE) - addr;
		}

		if (cnt) {
			debug_cpmsd("## %67c addr: %.5lx, cnt: %3d\n", ' ', addr, cnt);
			debug_cpmsd("## %67c addr: %.5lx, cnt: %3d\n", ' ', addr+cnt-TPA_BASE, BLOCK_SIZE-cnt);
		}

		if (dowrite) {
			if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) {
				buserr = 1;
				break;
			} else {
				if (cnt) {
					z80_read_block(disk_buffer, addr, cnt);
					addr = addr + cnt - TPA_BASE;
				}
				z80_read_block(disk_buffer+cnt, addr, BLOCK_SIZE - cnt);
				z80_bus_cmd(Release);
			}
			res = f_write(&drv_table[drv].fd, disk_buffer, BLOCK_SIZE, &br);
		} else {
			res = f_read(&drv_table[drv].fd, disk_buffer, BLOCK_SIZE, &br);
			if (res == FR_OK && br == BLOCK_SIZE) {
				if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) {
					buserr = 1;
					break;
				} else {
					if (cnt) {
						z80_write_block(disk_buffer, addr, cnt);
						addr = addr + cnt - TPA_BASE;
					}
					z80_write_block(disk_buffer+cnt, addr, BLOCK_SIZE - cnt);
					z80_bus_cmd(Release);
				}
			}
		}

		if (br != BLOCK_SIZE) {
			debug_cpmsd("## %7lu f_read res: %d, bytes rd/wr: %u\n", get_timer(0), res, br);
			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[] =
{
	{ 0,			/* fct nr. */
	  1, 3,			/* sub fct nr. from, to */
	  do_msg_ini_memfifo},
	{ 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},

};


void do_message(int len, uint8_t *msg)
{
	uint8_t fct, sub_fct;
	int_fast8_t i = 0;

	if (len >= 2) {
		fct = *msg++;
		sub_fct = *msg++;
		len -= 2;

		while (fct != z80_messages[i].fct) {
			if (z80_messages[i].fct == 0xff) {
				DBG_P(1, "do_message: Unknown function: %i, %i\n",
						fct, sub_fct);
				return; /* TODO: unknown message # */
			}

			++i;
		}

		while (fct == z80_messages[i].fct) {
			if (sub_fct >= z80_messages[i].sub_min &&
					sub_fct <= z80_messages[i].sub_max )
				break;
			++i;
		}

		if (z80_messages[i].fct != fct) {
			DBG_P(1, "do_message: Unknown sub function: %i, %i\n",
					fct, sub_fct);
			return; /* TODO: unknown message sub# */
		}

		(z80_messages[i].func)(sub_fct, len, msg);


	} else {
		/* TODO: error */
		DBG_P(1, "do_message: to few arguments (%i); this shouldn't happen!\n", len);
	}
}


#define CTRBUF_LEN 256

void check_msg_fifo(void)
{
	int ch;
	static int_fast8_t state;
	static int msglen,idx;
	static uint8_t buffer[CTRBUF_LEN];

	while ((ch = z80_memfifo_getc(fifo_msgin)) >= 0) {
		switch (state) {
		case 0:		/* wait for start of message */
			if (ch == 0xAE)	{ /* TODO: magic number */
				msglen = 0;
				idx = 0;
				state = 1;
			}
			break;
		case 1:		/* get msg len */
			if (ch > 0 && ch <= CTRBUF_LEN) {
				msglen = ch;
				state = 2;
			} else
				state = 0;
			break;
		case 2: 	/* get message */
			buffer[idx++] = ch;
			if (idx == msglen) {
				do_message(msglen, buffer);
				state = 0;
			}
			break;
		}
	}
}


int msg_handling(int state)
{
	uint8_t pending;

	ATOMIC_BLOCK(ATOMIC_FORCEON) {
		pending = (Stat & S_MSG_PENDING) != 0;
		Stat &= ~S_MSG_PENDING;
	}
/*
 * TODO: if pending but no message chr --> special condition. ie init,...
 */

	if (pending) {
		switch (state) {
		case 0:			/* need init */
			/* Get address of fifo_list */
			z80_bus_cmd(Request);
			uint32_t fifo_list = z80_read(0x40) +
				((uint16_t) z80_read(0x41) << 8) +
				((uint32_t) z80_read(0x42) << 16);
			z80_bus_cmd(Release);
			if (fifo_list != 0) {
				/* Get address of fifo 0 */
				z80_bus_cmd(Request);
				uint32_t fifo_addr = z80_read(fifo_list) +
					((uint16_t) z80_read(fifo_list+1) << 8) +
					((uint32_t) z80_read(fifo_list+2) << 16);
				z80_bus_cmd(Release);
				if (fifo_addr != 0) {
					z80_memfifo_init(fifo_msgin, fifo_addr);
					state = 1;
				}
			}
			break;
		case 1:			/* awaiting messages */
			check_msg_fifo();
			break;
		}
	}

	return state;
}


static int handle_msg_handling;

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_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[] = {
	0xAF,			// xor     a
	0xED, 0x39, 0x36,	// out0    (rcr),a         ;disable  DRAM refresh
	0x3E, 0x30,		// ld      a,030h
	0xED, 0x39, 0x32	//out0    (dcntl),a       ;0 mem, max i/0 wait states
};

const FLASH uint8_t sertest[] = {
	0xAF,              //  	xor	a
	0xED, 0x39, 0x36,  //  	out0	(rcr),a		;disable  DRAM refresh
	0x3E, 0x30,        //  	ld	a,030h
	0xED, 0x39, 0x32,  //  	out0	(dcntl),a	;0 mem, max i/0 wait states
	0x3E, 0x80,        //  	ld	a,M_MPBT		;no MP, PS=10, DR=16, SS=0
	0xED, 0x39, 0x03,  //  	out0	(cntlb1),a
	0x3E, 0x64,        //  	ld	a,M_RE + M_TE + M_MOD2	;
	0xED, 0x39, 0x01,  //  	out0	(cntla1),a
	0x3E, 0x00,        //  	ld	a,0
	0xED, 0x39, 0x05,  //  	out0	(stat1),a	;Enable rx interrupts
	0xED, 0x38, 0x05,  //l0:in0	a,(stat1)
	0xE6, 0x80,        //  	and	80h
	0x28, 0xF9,        //  	jr	z,l0
	0xED, 0x00, 0x09,  //  	in0	b,(rdr1)
	0xED, 0x38, 0x05,  //l1:in0	a,(stat1)
	0xE6, 0x02,        //  	and	02h
	0x28, 0xF9,        //  	jr	z,l1
	0xED, 0x01, 0x07,  //  	out0	(tdr1),b
	0x18, 0xEA,        //  	jr	l0
};

const FLASH uint8_t test1[] = {
	0xAF,              //	xor	a
	0xED, 0x39, 0x36,  //	out0	(rcr),a		;disable  DRAM refresh
	0x3E, 0x30,        //	ld	a,030h
	0xED, 0x39, 0x32,  //	out0	(dcntl),a	;0 mem, max i/0 wait states
	0x21, 0x1E, 0x00,  // 	ld	hl,dmclrt	;load DMA registers
	0x06, 0x08,        //	ld	b,dmct_e-dmclrt
	0x0E, 0x20,        //	ld	c,sar0l
	0xED, 0x93,        //	otimr
	0x3E, 0xC3,        //	ld	a,0c3h		;dst +1, src +1, burst
	0xED, 0x39, 0x31,  //	out0	(dmode),a	;
	0x3E, 0x62,        //	ld	a,062h		;enable dma0,
	0xED, 0x39, 0x30,  //cl_1:	out0	(dstat),a	;copy 64k
	0x18, 0xFB,        //	jr	cl_1		;
	0x00, 0x00,        //dmclrt:	dw	0		;src (inc)
	0x00,              //	db 	0		;src
	0x00, 0x00,        //	dw	0		;dst (inc),
	0x00,              //	db	0		;dst
	0x00, 0x00,        //	dw 	0		;count (64k)
};
#endif
Commit	Line	Data
35edb766 L	1	/*
	2	* (C) Copyright 2014 Leo C. <erbl259-lmu@yahoo.de>
	3	*
	4	* SPDX-License-Identifier: GPL-2.0+
	5	*/
	6
72f58822	7	#include "common.h"
5f7f3586 L	8	#include <stdlib.h>
	9	#include <string.h>
	10	#include <stdbool.h>
89adce76	11	#include <util/atomic.h>
72f58822	12
89adce76	13	#include "background.h"
5f7f3586 L	14	#include "env.h"
5f7f3586 L	15	#include "ff.h"
72f58822 L	16	#include "serial.h"
72f58822 L	17	#include "z80-if.h"
889202c4	18	#include "debug.h"
5f7f3586	19	#include "print-utils.h"
89adce76	20	#include "z180-serv.h"
daacc6f9	21	#include "timer.h"
845cbdbd L	22	#include "time.h"
	23	#include "bcd.h"
	24	#include "rtc.h"
7d60b20b L	25
	26	#define DEBUG_CPM_SDIO 0 /* set to 1 to debug */
	27
	28	#define debug_cpmsd(fmt, args...) \
	29	debug_cond(DEBUG_CPM_SDIO, fmt, ##args)
	30
	31
	32
72f58822 L	33	/--------------------------------------------------------------------------/
72f58822 L	34
72f58822 L	35
	36	uint8_t z80_get_byte(uint32_t adr)
	37	{
	38	uint8_t data;
8a7decea	39
62f624d3	40	z80_bus_cmd(Request);
89adce76	41	data = z80_read(adr);
62f624d3	42	z80_bus_cmd(Release);
8a7decea	43
72f58822 L	44	return data;
	45	}
	46
	47
	48	/--------------------------------------------------------------------------/
	49
	50	struct msg_item {
	51	uint8_t fct;
	52	uint8_t sub_min, sub_max;
	53	void (func)(uint8_t, int, uint8_t );
	54	};
	55
	56	uint32_t msg_to_addr(uint8_t *msg)
	57	{
	58	union {
	59	uint32_t as32;
	60	uint8_t as8[4];
	61	} addr;
	62
	63	addr.as8[0] = msg[0];
	64	addr.as8[1] = msg[1];
	65	addr.as8[2] = msg[2];
	66	addr.as8[3] = 0;
	67
	68	return addr.as32;
	69	}
	70
72f58822	71
1a2460dc L	72	static int msg_xmit_header(uint8_t func, uint8_t subf, int len)
	73	{
	74	z80_memfifo_putc(fifo_msgout, 0xAE);
	75	z80_memfifo_putc(fifo_msgout, len+2);
	76	z80_memfifo_putc(fifo_msgout, func);
	77	z80_memfifo_putc(fifo_msgout, subf);
	78
	79	return 0;
	80	}
	81
	82	int msg_xmit(uint8_t func, uint8_t subf, int len, uint8_t *msg)
	83	{
	84	msg_xmit_header(func, subf, len);
	85	while (len--)
	86	z80_memfifo_putc(fifo_msgout, *msg++);
	87
	88	return 0;
	89	}
	90
72f58822 L	91	void do_msg_ini_memfifo(uint8_t subf, int len, uint8_t * msg)
	92	{
	93	(void)len;
	94
89adce76	95	z80_memfifo_init(subf, msg_to_addr(msg));
72f58822 L	96	}
	97
	98
	99	void do_msg_char_out(uint8_t subf, int len, uint8_t * msg)
	100	{
	101	(void)subf;
	102
	103	while (len--)
	104	putchar(*msg++);
	105	}
	106
1a2460dc L	107	/* echo message */
	108	void do_msg_echo(uint8_t subf, int len, uint8_t * msg)
	109	{
	110	(void)subf;
	111
	112	/* send re-echo */
	113	msg_xmit(1, 3, len, msg);
	114	}
	115
8590a76b L	116	/* get timer */
	117	void do_msg_get_timer(uint8_t subf, int len, uint8_t * msg)
	118	{
a8eb521f	119	uint32_t time_ms = (len >= 4) ? (uint32_t ) msg : 0;
8590a76b	120
a8eb521f	121	time_ms = get_timer(time_ms);
8590a76b L	122	msg_xmit(3, subf, sizeof(time_ms), (uint8_t *) &time_ms);
	123	}
	124
5f7f3586 L	125	/* ---------------------------------------------------------------------------*/
5f7f3586 L	126
845cbdbd L	127	#define CPM_DAY_OFFSET ((1978-1900) * 365 + 19) /* 19 leap years */
	128
	129	/*
	130	* Convert CP/M time stamp to a broken-down time structure
	131	*
	132	*/
	133	int mk_date_time (int len, uint8_t msg, struct tm tmp)
	134	{
	135	time_t stamp;
	136
	137	if (len != 5)
	138	return -1;
	139
	140	/* days since 2000-01-01 */
	141	long days = msg[3] + (msg[4] << 8) - 8036;
	142
	143	if (days < 0)
	144	return -1;
	145
	146	stamp = days * ONE_DAY;
	147	stamp += bcd2bin(msg[0]);
	148	stamp += bcd2bin(msg[1]) * 60 ;
	149	stamp += bcd2bin(msg[2]) * 3600;
	150	gmtime_r(&stamp, tmp);
	151	return 0;
	152	}
	153
	154	void mk_cpm_time(struct tm *tmp, uint8_t cpm_time[5])
	155	{
	156	uint16_t days = 1;
	157	uint_fast8_t leap=2;
	158
	159	for (int year=78; year < tmp->tm_year; year++) {
	160	days = days + 365 + (leap == 0);
	161	leap = (leap+1)%4;
	162	}
	163	days += tmp->tm_yday;
	164
	165	cpm_time[0] = bin2bcd(tmp->tm_sec);
	166	cpm_time[1] = bin2bcd(tmp->tm_min);
	167	cpm_time[2] = bin2bcd(tmp->tm_hour);
	168	cpm_time[3] = days;
	169	cpm_time[4] = days >> 8;
	170
	171	debug("## mk_cpmtime: tm_year: %d, tm_yday: %d, days: %d\n",
	172	tmp->tm_year, tmp->tm_yday, days);
	173	}
	174
	175	/* get/set cp/m time */
	176	void do_msg_get_set_time(uint8_t subf, int len, uint8_t * msg)
	177	{
	178	struct tm t;
	179	uint8_t cpm_time[5];
	180	int rc;
	181
	182	memset(cpm_time, 0, ARRAY_SIZE(cpm_time));
	183
	184	switch (subf) {
	185	case 3: /* set date & time */
	186	/* initialize t with current time */
	187	rc = rtc_get (&t);
	188
	189	if (rc == 0) {
	190	/* insert new date & time */
191	if (mk_date_time (len, msg, &t) != 0) {
192	my_puts_P(PSTR("## set_time: Bad date format\n"));
193	break;
194	}
195
196	time_t time;
197	time = mk_gmtime(&t);
198	gmtime_r(&time, &t);
199
200	/* and write to RTC */
201	rc = rtc_set (&t);
202	if(rc)
203	my_puts_P(PSTR("## set_time: Set date failed\n"));
204	} else {
205	my_puts_P(PSTR("## set_time: Get date failed\n"));
206	}
207	/* FALL TROUGH */
208	case 2: /* get date & time */
209	rc = rtc_get (&t);
210
211	if (rc) {
212	my_puts_P(PSTR("## get_time: Get date failed\n"));
213	break;
214	}
215
216	time_t time;
217	time = mk_gmtime(&t);
218	//mktime(&t);
219	gmtime_r(&time, &t);
220
221
222	mk_cpm_time(&t, cpm_time);
223	break;
224	}
225
226	msg_xmit(3, subf, sizeof(cpm_time), cpm_time);
227	}
228
229	/* ---------------------------------------------------------------------------*/
230
01484095	231	#define MAX_DRIVE 4
5f7f3586	232	#define BLOCK_SIZE 512
daacc6f9 L	233	#define TPA_BASE 0x10000
daacc6f9 L	234	#define COMMON_BASE 0xC000
5f7f3586 L	235
	236	struct cpm_drive_s {
	237	uint8_t drv;
	238	uint8_t device;
	239	char *img_name;
393b1897	240	bool dirty;
5f7f3586 L	241	FIL fd;
	242	};
	243
	244	static uint8_t disk_buffer[BLOCK_SIZE];
5f7f3586	245	static struct cpm_drive_s drv_table[MAX_DRIVE];
393b1897 L	246	static int handle_cpm_drv_to;
	247
	248	#define f_dirty(fp) ((fp)->fs->wflag != 0)
	249
	250
	251	int cpm_drv_to(int state)
	252	{
	253	static uint32_t ts;
	254
	255	switch(state) {
	256	case 0:
	257	break;
	258
	259	case 1:
	260	ts = get_timer(0);
	261	state = 2;
	262	break;
	263
	264	case 2:
	265	if (get_timer(ts) > 1000) {
	266	for (uint_fast8_t i=0; i < MAX_DRIVE; i++) {
	267	// if (&drv_table[i].fd && f_dirty(&drv_table[i].fd)) {
	268	if (drv_table[i].dirty) {
	269	f_sync(&drv_table[i].fd);
	270	drv_table[i].dirty = false;
	271	debug_cpmsd("## %7lu f_sync: %c:\n", get_timer(0), i+'A');
	272	}
	273	}
	274	state = 0;
	275	}
	276	}
	277	return state;
	278	}
	279
	280
	281	void msg_cpm_result(uint8_t subf, uint8_t rc, int res)
	282	{
	283	uint8_t result_msg[3];
	284
	285	if (res)
	286	rc \|= 0x80;
	287
	288	result_msg[0] = rc;
	289	result_msg[1] = res;
	290	result_msg[2] = res >> 8;
	291
	292	if (rc) {
	293	debug_cpmsd("###%7lu error rc: %.02x, res: %d\n", get_timer(0), rc, res);
	294	}
	295
	296	msg_xmit(2, subf, sizeof(result_msg), result_msg);
	297	}
5f7f3586 L	298
	299	/*
	300	db 2 ; disk command
	301	ds 1 ; subcommand (login/read/write)
	302	ds 1 ; @adrv (8 bits) +0
	303	ds 1 ; @rdrv (8 bits) +1
	304	ds 3 ; @xdph (24 bits) +2
	305	*/
	306
	307	void do_msg_cpm_login(uint8_t subf, int len, uint8_t * msg)
	308	{
	309
	310	FRESULT res = 0;
5f7f3586 L	311	uint8_t drv;
5f7f3586 L	312	char *np;
5f7f3586 L	313
	314	(void)subf;
	315
	316	if (len != 5) { /* TODO: check adrv, rdrv */
393b1897	317	return msg_cpm_result(subf, 0x01, res);
5f7f3586 L	318	}
5f7f3586 L	319
7d60b20b	320	debug_cpmsd("\n## %7lu login: %c:\n", get_timer(0), msg[0]+'A');
5f7f3586 L	321
	322
	323	drv = msg[0];
	324	if ( drv>= MAX_DRIVE) {
393b1897	325	return msg_cpm_result(subf, 0x02, res);
5f7f3586 L	326	}
5f7f3586 L	327
5f7f3586 L	328	/*
	329	uint32_t dph = ((uint32_t)msg[4] << 16) + ((uint16_t)msg[3] << 8) + msg[2];
	330	*/
	331
	332	if (drv_table[drv].img_name != NULL) {
7d60b20b	333	debug_cpmsd("## %7lu close: '%s'\n", get_timer(0), drv_table[drv].img_name);
5f7f3586	334	f_close(&drv_table[drv].fd);
393b1897	335	drv_table[drv].dirty = false;
5f7f3586 L	336	free(drv_table[drv].img_name);
	337	drv_table[drv].img_name = NULL;
	338	}
	339
	340	strcpy_P((char *)disk_buffer, PSTR("dsk0"));
	341	disk_buffer[3] = msg[0] + '0';
	342	if (((np = getenv((char*)disk_buffer)) == NULL) \|\|
	343	((drv_table[drv].img_name = strdup(np)) == NULL)) {
393b1897	344	return msg_cpm_result(subf, 0x03, res);
5f7f3586 L	345	}
	346
	347
	348	res = f_open(&drv_table[drv].fd, drv_table[drv].img_name,
	349	FA_WRITE \| FA_READ);
	350
7d60b20b	351	debug_cpmsd("## %7lu open: '%s', (env: '%s'), res: %d\n", get_timer(0),
5f7f3586 L	352	drv_table[drv].img_name, disk_buffer, res);
5f7f3586 L	353
5f7f3586	354	/* send result*/
393b1897	355	msg_cpm_result(subf, 0x00, res);
5f7f3586 L	356	}
	357
	358
	359	/*
	360	db 2 ; disk command
	361	ds 1 ; subcommand (login/read/write)
daacc6f9 L	362	ds 1 ; @adrv (8 bits) +0
	363	ds 1 ; @rdrv (8 bits) +1
	364	ds 2 ; @trk (16 bits) +2
	365	ds 2 ; @sect(16 bits) +4
	366	ds 1 ; @cnt (8 bits) +6
5f7f3586 L	367	ds 3 ; phys. transfer addr +7
	368	*/
	369
daacc6f9 L	370	#define ADRV 0
	371	#define RDRV 1
	372	#define TRK 2
	373	#define SEC 4
	374	#define CNT 6
	375	#define ADDR 7
	376
5f7f3586 L	377	void do_msg_cpm_rw(uint8_t subf, int len, uint8_t * msg)
	378	{
	379	uint8_t drv;
	380	uint32_t addr;
	381	uint32_t pos;
7d60b20b	382	uint8_t secs;
5f7f3586 L	383	bool dowrite = (subf == 2);
	384	FRESULT res = 0;
	385	uint8_t rc = 0;
	386	bool buserr = 0;
5f7f3586 L	387
5f7f3586 L	388	if (len != 10) { /* TODO: check adrv, rdrv */
393b1897	389	return msg_cpm_result(subf, 0x01, res);
5f7f3586 L	390	}
5f7f3586 L	391
daacc6f9	392	drv = msg[ADRV];
5f7f3586	393	if ( drv>= MAX_DRIVE) {
393b1897	394	return msg_cpm_result(subf, 0x02, res);
5f7f3586 L	395	}
5f7f3586 L	396
7d60b20b	397	secs = msg[CNT];
daacc6f9	398	addr = ((uint32_t)msg[ADDR+2] << 16) + ((uint16_t)msg[ADDR+1] << 8) + msg[ADDR];
5f7f3586	399
5f7f3586	400
daacc6f9 L	401	/* TODO: tracks per sector from dpb */
	402	pos = (((uint16_t)(msg[TRK+1] << 8) + msg[TRK]) * 8
	403	+ ((uint32_t)(msg[SEC+1] << 8) + msg[SEC])) * BLOCK_SIZE;
5f7f3586	404
7d60b20b L	405	debug_cpmsd("## %7lu cpm_rw: %s %c: trk:%4d, sec: %d, pos: %.8lx, secs: %2d, "
	406	"addr: %.5lx\n", get_timer(0), dowrite ? "write" : " read",
	407	msg[ADRV]+'A', ((uint16_t)(msg[TRK+1] << 8) + msg[TRK]), msg[SEC],
	408	pos, msg[CNT], addr);
5f7f3586 L	409
5f7f3586 L	410	res = f_lseek(&drv_table[drv].fd, pos);
7d60b20b	411	while (!res && secs--) {
daacc6f9 L	412	unsigned int cnt, br;
daacc6f9 L	413
7d60b20b L	414	/* check bank boundary crossing */
7d60b20b L	415	cnt = 0;
daacc6f9	416	if (addr < (TPA_BASE + COMMON_BASE) &&
7d60b20b	417	(addr + BLOCK_SIZE) > (TPA_BASE + COMMON_BASE)) {
daacc6f9	418	cnt = (TPA_BASE + COMMON_BASE) - addr;
daacc6f9 L	419	}
daacc6f9 L	420
7d60b20b L	421	if (cnt) {
	422	debug_cpmsd("## %67c addr: %.5lx, cnt: %3d\n", ' ', addr, cnt);
	423	debug_cpmsd("## %67c addr: %.5lx, cnt: %3d\n", ' ', addr+cnt-TPA_BASE, BLOCK_SIZE-cnt);
	424	}
5f7f3586 L	425
	426	if (dowrite) {
	427	if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) {
	428	buserr = 1;
7d60b20b	429	break;
5f7f3586	430	} else {
7d60b20b L	431	if (cnt) {
	432	z80_read_block(disk_buffer, addr, cnt);
	433	addr = addr + cnt - TPA_BASE;
	434	}
	435	z80_read_block(disk_buffer+cnt, addr, BLOCK_SIZE - cnt);
5f7f3586	436	z80_bus_cmd(Release);
5f7f3586	437	}
7d60b20b	438	res = f_write(&drv_table[drv].fd, disk_buffer, BLOCK_SIZE, &br);
5f7f3586	439	} else {
7d60b20b L	440	res = f_read(&drv_table[drv].fd, disk_buffer, BLOCK_SIZE, &br);
7d60b20b L	441	if (res == FR_OK && br == BLOCK_SIZE) {
5f7f3586 L	442	if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) {
5f7f3586 L	443	buserr = 1;
7d60b20b	444	break;
5f7f3586	445	} else {
7d60b20b L	446	if (cnt) {
	447	z80_write_block(disk_buffer, addr, cnt);
	448	addr = addr + cnt - TPA_BASE;
	449	}
	450	z80_write_block(disk_buffer+cnt, addr, BLOCK_SIZE - cnt);
5f7f3586 L	451	z80_bus_cmd(Release);
	452	}
	453	}
	454	}
	455
7d60b20b L	456	if (br != BLOCK_SIZE) {
7d60b20b L	457	debug_cpmsd("## %7lu f_read res: %d, bytes rd/wr: %u\n", get_timer(0), res, br);
5f7f3586 L	458	dump_ram(disk_buffer, 0, 64, "Read Data");
	459	res = -1;
	460	}
daacc6f9	461
7d60b20b	462	addr += BLOCK_SIZE;
5f7f3586 L	463	}
5f7f3586 L	464
393b1897 L	465	if (dowrite && !res) {
	466	// res = f_sync(&drv_table[drv].fd);
	467	drv_table[drv].dirty = true;
	468	bg_setstat(handle_cpm_drv_to, 1);
	469	}
	470
daacc6f9	471
5f7f3586	472	if (buserr) {
7d60b20b	473	debug_cpmsd("Bus timeout\n");
5f7f3586 L	474	rc = 0x03;
5f7f3586 L	475	}
5f7f3586 L	476
5f7f3586 L	477	/* send result*/
393b1897	478	msg_cpm_result(subf, rc, res);
5f7f3586 L	479	}
5f7f3586 L	480
72f58822 L	481
	482	const FLASH struct msg_item z80_messages[] =
	483	{
	484	{ 0, /* fct nr. */
89adce76	485	1, 3, /* sub fct nr. from, to */
72f58822 L	486	do_msg_ini_memfifo},
	487	{ 1,
	488	1, 1,
	489	do_msg_char_out},
1a2460dc L	490	{ 1,
	491	2, 2,
	492	do_msg_echo},
5f7f3586 L	493	{ 2,
	494	0, 0,
	495	do_msg_cpm_login},
	496	{ 2,
	497	1, 2,
	498	do_msg_cpm_rw},
8590a76b L	499	{ 3,
	500	1, 1,
	501	do_msg_get_timer},
845cbdbd L	502	{ 3,
	503	2, 3, /* 2: get, 3: set time and date */
	504	do_msg_get_set_time},
72f58822 L	505	{ 0xff, /* end mark */
	506	0, 0,
	507	0},
	508
	509	};
	510
	511
	512
	513
	514	void do_message(int len, uint8_t *msg)
	515	{
	516	uint8_t fct, sub_fct;
	517	int_fast8_t i = 0;
	518
	519	if (len >= 2) {
	520	fct = *msg++;
	521	sub_fct = *msg++;
	522	len -= 2;
	523
89adce76 L	524	while (fct != z80_messages[i].fct) {
	525	if (z80_messages[i].fct == 0xff) {
	526	DBG_P(1, "do_message: Unknown function: %i, %i\n",
	527	fct, sub_fct);
	528	return; /* TODO: unknown message # */
	529	}
8a7decea	530
72f58822	531	++i;
72f58822 L	532	}
	533
	534	while (fct == z80_messages[i].fct) {
8a7decea	535	if (sub_fct >= z80_messages[i].sub_min &&
89adce76	536	sub_fct <= z80_messages[i].sub_max )
72f58822 L	537	break;
	538	++i;
	539	}
	540
	541	if (z80_messages[i].fct != fct) {
	542	DBG_P(1, "do_message: Unknown sub function: %i, %i\n",
	543	fct, sub_fct);
	544	return; /* TODO: unknown message sub# */
	545	}
	546
	547	(z80_messages[i].func)(sub_fct, len, msg);
	548
	549
	550	} else {
	551	/* TODO: error */
	552	DBG_P(1, "do_message: to few arguments (%i); this shouldn't happen!\n", len);
	553	}
	554	}
	555
	556
	557
	558	#define CTRBUF_LEN 256
	559
	560	void check_msg_fifo(void)
	561	{
	562	int ch;
	563	static int_fast8_t state;
	564	static int msglen,idx;
	565	static uint8_t buffer[CTRBUF_LEN];
	566
89adce76	567	while ((ch = z80_memfifo_getc(fifo_msgin)) >= 0) {
72f58822 L	568	switch (state) {
72f58822 L	569	case 0: /* wait for start of message */
3531528e	570	if (ch == 0xAE) { /* TODO: magic number */
72f58822 L	571	msglen = 0;
	572	idx = 0;
	573	state = 1;
	574	}
	575	break;
	576	case 1: /* get msg len */
	577	if (ch > 0 && ch <= CTRBUF_LEN) {
	578	msglen = ch;
	579	state = 2;
	580	} else
	581	state = 0;
	582	break;
	583	case 2: /* get message */
	584	buffer[idx++] = ch;
89adce76 L	585	if (idx == msglen) {
	586	do_message(msglen, buffer);
	587	state = 0;
	588	}
	589	break;
	590	}
	591	}
	592	}
	593
	594
	595	int msg_handling(int state)
	596	{
	597	uint8_t pending;
8a7decea L	598
8a7decea L	599	ATOMIC_BLOCK(ATOMIC_FORCEON) {
89adce76 L	600	pending = (Stat & S_MSG_PENDING) != 0;
	601	Stat &= ~S_MSG_PENDING;
	602	}
ad9bc17c L	603	/*
	604	* TODO: if pending but no message chr --> special condition. ie init,...
	605	*/
8a7decea	606
89adce76 L	607	if (pending) {
89adce76 L	608	switch (state) {
1a2460dc	609	case 0: /* need init */
cdc4625b	610	/* Get address of fifo_list */
89adce76	611	z80_bus_cmd(Request);
cdc4625b	612	uint32_t fifo_list = z80_read(0x40) +
89adce76 L	613	((uint16_t) z80_read(0x41) << 8) +
	614	((uint32_t) z80_read(0x42) << 16);
	615	z80_bus_cmd(Release);
cdc4625b L	616	if (fifo_list != 0) {
	617	/* Get address of fifo 0 */
	618	z80_bus_cmd(Request);
	619	uint32_t fifo_addr = z80_read(fifo_list) +
	620	((uint16_t) z80_read(fifo_list+1) << 8) +
	621	((uint32_t) z80_read(fifo_list+2) << 16);
	622	z80_bus_cmd(Release);
	623	if (fifo_addr != 0) {
	624	z80_memfifo_init(fifo_msgin, fifo_addr);
	625	state = 1;
	626	}
89adce76 L	627	}
89adce76 L	628	break;
1a2460dc	629	case 1: /* awaiting messages */
89adce76	630	check_msg_fifo();
72f58822 L	631	break;
	632	}
	633	}
	634
89adce76 L	635	return state;
89adce76 L	636	}
89adce76 L	637
	638
	639	static int handle_msg_handling;
	640
	641	void setup_z180_serv(void)
	642	{
8a7decea	643
89adce76	644	handle_msg_handling = bg_register(msg_handling, 0);
393b1897	645	handle_cpm_drv_to = bg_register(cpm_drv_to, 0);
72f58822 L	646	}
72f58822 L	647
89adce76 L	648	void restart_z180_serv(void)
	649	{
	650	z80_bus_cmd(Request);
	651	z80_write(0x40, 0);
	652	z80_write(0x41, 0);
	653	z80_write(0x42, 0);
	654	z80_bus_cmd(Release);
8a7decea L	655
	656	for (int i = 0; i < NUM_FIFOS; i++)
	657	z80_memfifo_init(i, 0);
89adce76	658	bg_setstat(handle_msg_handling, 0);
5f7f3586	659
89adce76	660	}
72f58822	661
845cbdbd	662	#if 0
72f58822 L	663	/--------------------------------------------------------------------------/
72f58822 L	664
72f58822 L	665	const FLASH uint8_t iniprog[] = {
	666	0xAF, // xor a
	667	0xED, 0x39, 0x36, // out0 (rcr),a ;disable DRAM refresh
	668	0x3E, 0x30, // ld a,030h
	669	0xED, 0x39, 0x32 //out0 (dcntl),a ;0 mem, max i/0 wait states
	670	};
	671
	672	const FLASH uint8_t sertest[] = {
	673	0xAF, // xor a
	674	0xED, 0x39, 0x36, // out0 (rcr),a ;disable DRAM refresh
	675	0x3E, 0x30, // ld a,030h
	676	0xED, 0x39, 0x32, // out0 (dcntl),a ;0 mem, max i/0 wait states
	677	0x3E, 0x80, // ld a,M_MPBT ;no MP, PS=10, DR=16, SS=0
	678	0xED, 0x39, 0x03, // out0 (cntlb1),a
	679	0x3E, 0x64, // ld a,M_RE + M_TE + M_MOD2 ;
	680	0xED, 0x39, 0x01, // out0 (cntla1),a
	681	0x3E, 0x00, // ld a,0
	682	0xED, 0x39, 0x05, // out0 (stat1),a ;Enable rx interrupts
	683	0xED, 0x38, 0x05, //l0:in0 a,(stat1)
	684	0xE6, 0x80, // and 80h
	685	0x28, 0xF9, // jr z,l0
	686	0xED, 0x00, 0x09, // in0 b,(rdr1)
	687	0xED, 0x38, 0x05, //l1:in0 a,(stat1)
	688	0xE6, 0x02, // and 02h
	689	0x28, 0xF9, // jr z,l1
	690	0xED, 0x01, 0x07, // out0 (tdr1),b
	691	0x18, 0xEA, // jr l0
	692	};
	693
	694	const FLASH uint8_t test1[] = {
	695	0xAF, // xor a
	696	0xED, 0x39, 0x36, // out0 (rcr),a ;disable DRAM refresh
	697	0x3E, 0x30, // ld a,030h
	698	0xED, 0x39, 0x32, // out0 (dcntl),a ;0 mem, max i/0 wait states
	699	0x21, 0x1E, 0x00, // ld hl,dmclrt ;load DMA registers
	700	0x06, 0x08, // ld b,dmct_e-dmclrt
	701	0x0E, 0x20, // ld c,sar0l
8a7decea	702	0xED, 0x93, // otimr
72f58822 L	703	0x3E, 0xC3, // ld a,0c3h ;dst +1, src +1, burst
72f58822 L	704	0xED, 0x39, 0x31, // out0 (dmode),a ;
8a7decea	705	0x3E, 0x62, // ld a,062h ;enable dma0,
72f58822 L	706	0xED, 0x39, 0x30, //cl_1: out0 (dstat),a ;copy 64k
72f58822 L	707	0x18, 0xFB, // jr cl_1 ;
8a7decea	708	0x00, 0x00, //dmclrt: dw 0 ;src (inc)
72f58822 L	709	0x00, // db 0 ;src
	710	0x00, 0x00, // dw 0 ;dst (inc),
	711	0x00, // db 0 ;dst
	712	0x00, 0x00, // dw 0 ;count (64k)
	713	};
845cbdbd	714	#endif