88 lines
2.1 KiB
C
88 lines
2.1 KiB
C
/* vim: tabstop=4 shiftwidth=4 noexpandtab
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*
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* Serial communication device
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*
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*/
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#include <system.h>
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#include <fs.h>
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#include <logging.h>
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uint32_t read_serial(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer);
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uint32_t write_serial(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer);
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void open_serial(fs_node_t *node, uint8_t read, uint8_t write);
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void close_serial(fs_node_t *node);
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uint32_t read_serial(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer) {
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if (size < 1) {
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return 0;
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}
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memset(buffer, 0x00, 1);
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uint32_t collected = 0;
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while (collected < size) {
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while (!serial_rcvd((int)node->device)) {
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switch_task(1);
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}
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debug_print(NOTICE, "Data received from TTY");
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buffer[collected] = serial_recv((int)node->device);
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collected++;
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}
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return collected;
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}
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uint32_t write_serial(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer) {
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uint32_t sent = 0;
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while (sent < size) {
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serial_send((int)node->device, buffer[sent]);
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sent++;
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}
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return size;
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}
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void open_serial(fs_node_t * node, uint8_t read, uint8_t write) {
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return;
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}
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void close_serial(fs_node_t * node) {
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return;
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}
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fs_node_t * serial_device_create(int device) {
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fs_node_t * fnode = malloc(sizeof(fs_node_t));
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memset(fnode, 0x00, sizeof(fs_node_t));
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fnode->device= (void *)device;
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strcpy(fnode->name, "serial");
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fnode->uid = 0;
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fnode->gid = 0;
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fnode->flags = FS_CHARDEVICE;
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fnode->read = read_serial;
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fnode->write = write_serial;
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fnode->open = open_serial;
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fnode->close = close_serial;
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fnode->readdir = NULL;
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fnode->finddir = NULL;
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fnode->ioctl = NULL; /* TODO ioctls for raw serial devices */
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fnode->atime = now();
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fnode->mtime = fnode->atime;
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fnode->ctime = fnode->atime;
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return fnode;
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}
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void serial_mount_devices() {
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fs_node_t * ttyS0 = serial_device_create(SERIAL_PORT_A);
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vfs_mount("/dev/ttyS0", ttyS0);
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fs_node_t * ttyS1 = serial_device_create(SERIAL_PORT_B);
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vfs_mount("/dev/ttyS1", ttyS1);
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fs_node_t * ttyS2 = serial_device_create(SERIAL_PORT_C);
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vfs_mount("/dev/ttyS2", ttyS2);
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fs_node_t * ttyS3 = serial_device_create(SERIAL_PORT_D);
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vfs_mount("/dev/ttyS3", ttyS3);
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}
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