/* * cp-clockf83.c - CP Clock F83 RTC (PCF8583) emulation. * * Written by * Marco van den Heuvel * * This file is part of VICE, the Versatile Commodore Emulator. * See README for copyright notice. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA * 02111-1307 USA. * */ /* CP Clock F83 TAPE PORT | PCF8583 | I/O ------------------------------------ MOTOR | SDA | O SENSE | SDA | I WRITE | SCL | O */ #include "vice.h" #include #include #include #include "cmdline.h" #include "machine.h" #include "pcf8583.h" #include "resources.h" #include "snapshot.h" #include "tapeport.h" #include "cp-clockf83.h" static int tapertc_enabled[TAPEPORT_MAX_PORTS] = { 0 }; /* rtc context */ static rtc_pcf8583_t *tapertc_context[TAPEPORT_MAX_PORTS] = { NULL }; /* rtc save */ static int tapertc_save = 0; /* ------------------------------------------------------------------------- */ /* Some prototypes are needed */ static void tapertc_store_sda(int port, int flag); static void tapertc_store_scl(int port, int write_bit); static int tapertc_write_snapshot(int port, struct snapshot_s *s, int write_image); static int tapertc_read_snapshot(int port, struct snapshot_s *s); static int tapertc_enable(int port, int val); static tapeport_device_t tapertc_device = { "Tape RTC (PCF8583)", /* device name */ TAPEPORT_DEVICE_TYPE_RTC, /* device is an 'RTC' type device */ VICE_MACHINE_ALL, /* device works on all machines */ TAPEPORT_PORT_ALL_MASK, /* device works on all ports */ tapertc_enable, /* device enable function */ NULL, /* NO device specific hard reset function */ tapertc_resources_shutdown, /* device shutdown function */ tapertc_store_sda, /* set motor line function */ tapertc_store_scl, /* NO set write line function */ NULL, /* NO set sense line function */ NULL, /* NO set read line function */ tapertc_write_snapshot, /* device snapshot write function */ tapertc_read_snapshot /* device snapshot read function */ }; /* ------------------------------------------------------------------------- */ static int tapertc_enable(int port, int value) { int val = value ? 1 : 0; if (tapertc_enabled[port] == val) { return 0; } if (val) { tapertc_context[port] = pcf8583_init("TAPERTC", 2); pcf8583_set_data_line(tapertc_context[port], 1); pcf8583_set_clk_line(tapertc_context[port], 1); } else { if (tapertc_context[port]) { pcf8583_destroy(tapertc_context[port], tapertc_save); tapertc_context[port] = NULL; } } tapertc_enabled[port] = val; return 0; } static int set_tapertc_save(int val, void *param) { tapertc_save = val ? 1 : 0; return 0; } static const resource_int_t resources_int[] = { { "CPClockF83Save", 0, RES_EVENT_STRICT, (resource_value_t)0, &tapertc_save, set_tapertc_save, NULL }, RESOURCE_INT_LIST_END }; int tapertc_resources_init(int amount) { if (tapeport_device_register(TAPEPORT_DEVICE_CP_CLOCK_F83, &tapertc_device) < 0) { return -1; } return resources_register_int(resources_int); } static const cmdline_option_t cmdline_options[] = { { "-cpclockf83save", SET_RESOURCE, CMDLINE_ATTRIB_NONE, NULL, NULL, "CPClockF83Save", (resource_value_t)1, NULL, "Enable saving of the CP Clock F83 (PCF8583 RTC) data when changed." }, { "+cpclockf83save", SET_RESOURCE, CMDLINE_ATTRIB_NONE, NULL, NULL, "CPClockF83Save", (resource_value_t)0, NULL, "Disable saving of the CP Clock F83 (PCF8583 RTC) data when changed." }, CMDLINE_LIST_END }; int tapertc_cmdline_options_init(void) { return cmdline_register_options(cmdline_options); } void tapertc_resources_shutdown(void) { int i; for (i = 0; i < TAPEPORT_MAX_PORTS; i++) { if (tapertc_context[i]) { pcf8583_destroy(tapertc_context[i], tapertc_save); tapertc_context[i] = NULL; } } } /* ---------------------------------------------------------------------*/ static uint8_t motor_state[TAPEPORT_MAX_PORTS]; static void check_sense(int port) { int sense_from_rtc; sense_from_rtc = pcf8583_read_data_line(tapertc_context[port]); if (!sense_from_rtc) { tapeport_set_tape_sense(0, port); } else if (motor_state[port]) { tapeport_set_tape_sense(0, port); } else { tapeport_set_tape_sense(1, port); } } static void tapertc_store_sda(int port, int flag) { motor_state[port] = flag; pcf8583_set_data_line(tapertc_context[port], (uint8_t)!motor_state[port]); check_sense(port); } static void tapertc_store_scl(int port, int write_bit) { uint8_t val = write_bit ? 1 : 0; pcf8583_set_clk_line(tapertc_context[port], val); check_sense(port); } /* ---------------------------------------------------------------------*/ /* TP_CP_CLOCK_F83 snapshot module format: type | name | description --------------------------- BYTE | motor | motor state */ static const char snap_module_name[] = "TP_CP_CLOCK_F83"; #define SNAP_MAJOR 0 #define SNAP_MINOR 1 static int tapertc_write_snapshot(int port, struct snapshot_s *s, int write_image) { snapshot_module_t *m; m = snapshot_module_create(s, snap_module_name, SNAP_MAJOR, SNAP_MINOR); if (m == NULL) { return -1; } if (SMW_B(m, motor_state[port]) < 0) { snapshot_module_close(m); return -1; } snapshot_module_close(m); return pcf8583_write_snapshot(tapertc_context[port], s); } static int tapertc_read_snapshot(int port, struct snapshot_s *s) { uint8_t major_version, minor_version; snapshot_module_t *m; m = snapshot_module_open(s, snap_module_name, &major_version, &minor_version); if (m == NULL) { return -1; } /* Do not accept versions higher than current */ if (snapshot_version_is_bigger(major_version, minor_version, SNAP_MAJOR, SNAP_MINOR)) { snapshot_set_error(SNAPSHOT_MODULE_HIGHER_VERSION); goto fail; } if (SMR_B(m, &motor_state[port]) < 0) { goto fail; } snapshot_module_close(m); return pcf8583_read_snapshot(tapertc_context[port], s); fail: snapshot_module_close(m); return -1; }