X-Git-Url: http://cloudbase.mooo.com/gitweb/z180-stamp.git/blobdiff_plain/05437fb4cdb907816a4fc3ffafa2617fcf33266a..bbd45c46a75edd930486980c0d6a94c52d8cf403:/avr/z180-serv.c diff --git a/avr/z180-serv.c b/avr/z180-serv.c index a920465..22dafe1 100644 --- a/avr/z180-serv.c +++ b/avr/z180-serv.c @@ -1,14 +1,24 @@ +/* + * (C) Copyright 2014 Leo C. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + #include "common.h" +#include +#include +#include #include #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" - - /*--------------------------------------------------------------------------*/ @@ -48,6 +58,25 @@ 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 +93,215 @@ 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); +} + +/* ---------------------------------------------------------------------------*/ + +#define MAX_DRIVE 2 +#define BLOCK_SIZE 512 + + +struct cpm_drive_s { + uint8_t drv; + uint8_t device; + char *img_name; + FIL fd; +}; + +static uint8_t disk_buffer[BLOCK_SIZE]; +static struct cpm_drive_s drv_table[MAX_DRIVE]; + +/* + 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 rc = 0; + uint8_t drv; + char *np; + uint8_t result_msg[3]; + + (void)subf; + + if (len != 5) { /* TODO: check adrv, rdrv */ + rc = 0x01; + goto out; + } + + debug("\n## login: %c:\n", msg[0]+'A'); + + + drv = msg[0]; + if ( drv>= MAX_DRIVE) { + rc = 0x02; + goto out; + } + +/* + uint32_t dph = ((uint32_t)msg[4] << 16) + ((uint16_t)msg[3] << 8) + msg[2]; +*/ + + if (drv_table[drv].img_name != NULL) { + debug("## close: '%s'\n", drv_table[drv].img_name); + f_close(&drv_table[drv].fd); + 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)) { + rc = 0x03; + goto out; + } + + + res = f_open(&drv_table[drv].fd, drv_table[drv].img_name, + FA_WRITE | FA_READ); + + debug("## open: '%s', (env: '%s'), res: %d\n", + drv_table[drv].img_name, disk_buffer, res); + +out: + + if (res) + rc |= 0x80; + + result_msg[0] = rc; + result_msg[1] = res; + result_msg[2] = res >> 8; + + if (rc) { + debug("## error rc: %.02x, res: %d\n", rc, res); + }; + + /* send result*/ + 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 1 ; @cnt (8 bits) +2 + ds 2 ; @trk (16 bits) +3 + ds 2 ; @sect(16 bits) +5 + ds 3 ; phys. transfer addr +7 +*/ + +void do_msg_cpm_rw(uint8_t subf, int len, uint8_t * msg) +{ + uint8_t drv; + uint32_t addr; + uint32_t pos; + + bool dowrite = (subf == 2); + FRESULT res = 0; + uint8_t rc = 0; + bool buserr = 0; + uint8_t result_msg[3]; + + if (len != 10) { /* TODO: check adrv, rdrv */ + rc = 0x01; + goto out; + } + + drv = msg[0]; + if ( drv>= MAX_DRIVE) { + rc = 0x02; + goto out; + } + + addr = ((uint32_t)msg[9] << 16) + ((uint16_t)msg[8] << 8) + msg[7]; + + /* bytes = BLOCK_SIZE; */ /* TODO: multi sector count */ + pos = (((uint16_t)(msg[4] << 8) + msg[3]) * 8 + + ((uint32_t)(msg[6] << 8) + msg[5])) * BLOCK_SIZE; + + + debug("## cpm_rw: %s %c: trk: %4d, sec: %d, pos: 0x%.5lx, addr: 0x%.5lx\n", + dowrite ? "write" : " read", msg[0]+'A', + ((uint16_t)(msg[4] << 8) + msg[3]), msg[5], pos, addr); + + + + /* TODO: check bank boundary crossing */ + /* + if (addr + BLOCK_SIZE > MAX_MEMORY) + ... = MAX_MEMORY - addr; + */ + + + res = f_lseek(&drv_table[drv].fd, pos); + if (!res) { + unsigned int br; + + if (dowrite) { + if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) { + buserr = 1; + } else { + z80_read_block(disk_buffer, addr, BLOCK_SIZE); + z80_bus_cmd(Release); + res = f_write(&drv_table[drv].fd, disk_buffer, BLOCK_SIZE, &br); + if (!res) + res = f_sync(&drv_table[drv].fd); + } + } else { + res = f_read(&drv_table[drv].fd, disk_buffer, BLOCK_SIZE, &br); + if (res == FR_OK) { + if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) { + buserr = 1; + } else { + z80_write_block(disk_buffer, addr, br); + z80_bus_cmd(Release); + } + } + } + + if (br != BLOCK_SIZE) { + debug("## f_read res: %d, bytes rd/wr: %u\n", res, br); + dump_ram(disk_buffer, 0, 64, "Read Data"); + res = -1; + } + } + +out: + if (buserr) { + debug("Bus timeout\n"); + rc = 0x03; + } + if (res) + rc |= 0x80; + + result_msg[0] = rc; + result_msg[1] = res; + result_msg[2] = res >> 8; + + if (rc) { + debug("#### error rc: %.02x, res: %d\n", rc, res); + } + + /* send result*/ + msg_xmit(2, subf, sizeof(result_msg), result_msg); +} + const FLASH struct msg_item z80_messages[] = { @@ -73,6 +311,15 @@ 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}, { 0xff, /* end mark */ 0, 0, 0}, @@ -174,18 +421,27 @@ int msg_handling(int state) if (pending) { switch (state) { - case 0: + case 0: /* need init */ + /* Get address of fifo_list */ z80_bus_cmd(Request); - uint32_t addr = z80_read(0x40) + + uint32_t fifo_list = z80_read(0x40) + ((uint16_t) z80_read(0x41) << 8) + ((uint32_t) z80_read(0x42) << 16); z80_bus_cmd(Release); - if (addr != 0) { - z80_memfifo_init(fifo_msgin, addr); - state = 1; + 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: + case 1: /* awaiting messages */ check_msg_fifo(); break; } @@ -214,25 +470,10 @@ void restart_z180_serv(void) for (int i = 0; i < NUM_FIFOS; i++) z80_memfifo_init(i, 0); bg_setstat(handle_msg_handling, 0); -} - -/*--------------------------------------------------------------------------*/ -#if 0 -void dump_mem(const FLASH uint8_t *addr, uint32_t len) -{ - DBG_P(1, "hdrom dump:"); - while (len) { - DBG_P(1, "\n %.5x:", addr); - for (unsigned i = 0; i<16; i++) - DBG_P(1, " %.2x", *addr++); - len -= len > 16 ? 16 : len; - } - DBG_P(1, "\n"); } -#endif -/*--------------------------------------------------------------------------*/ +/*--------------------------------------------------------------------------*/ const FLASH uint8_t iniprog[] = { 0xAF, // xor a @@ -283,6 +524,3 @@ const FLASH uint8_t test1[] = { 0x00, // db 0 ;dst 0x00, 0x00, // dw 0 ;count (64k) }; - - -