104 lines
3.1 KiB
C
104 lines
3.1 KiB
C
#include <kernel/fs/smemfs.h>
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#include <kernel/fs/filesystem.h>
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#include <kernel/devices/earlyterm.h>
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#include <kernel/util/atomic.h>
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// Casio SMEM FileSystem primitives
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// @note: We use USB PowerGraphic 2 primitives
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struct file_system_type smemfs_filesystem =
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{
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// internal informations
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.fs_name = "smemfs",
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.fs_flags = FS_RDONLY,
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// FS specific openrations
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.filesystem_operations = {
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.mount = &smemfs_USB2_mount,
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.umount = &smemfs_USB2_umount
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},
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// File operations
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.file_operations = {
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.read = &smemfs_USB2_read,
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.write = NULL,
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.ioctl = NULL
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},
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// Inode operations
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.inode_operations = {
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// Walk
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.find_next_sibling = &smemfs_USB2_find_next_sibling,
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.find_first_child = &smemfs_USB2_find_first_child,
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.find_parent = &smemfs_USB2_find_parent,
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// Memory
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.create = NULL,
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.mkdir = NULL,
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.rmdir = NULL,
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.rename = NULL,
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// Informations
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.get_name = &smemfs_USB2_get_name,
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.get_mode = &smemfs_USB2_get_mode
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}
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};
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// Internal superblock informations
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struct smemfs_USB2_superblock smemfs_USB2_superblock;
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struct smemfs_USB3_superblock smemfs_USB3_superblock;
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// switch USB Power Graphic II driver to
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// USB Power Graphic III (Casio syscall wrapper)
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static void use_dump_smem_driver(void)
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{
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smemfs_USB3_superblock.root_inode = NULL;
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smemfs_filesystem.filesystem_operations.mount = &smemfs_USB3_mount;
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smemfs_filesystem.filesystem_operations.umount = NULL;
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smemfs_filesystem.file_operations.read = &smemfs_USB3_read;
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smemfs_filesystem.inode_operations.find_next_sibling = &smemfs_USB3_find_next_sibling;
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smemfs_filesystem.inode_operations.find_first_child = &smemfs_USB3_find_first_child;
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smemfs_filesystem.inode_operations.find_parent = &smemfs_USB3_find_parent;
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smemfs_filesystem.inode_operations.get_name = &smemfs_USB3_get_name;
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smemfs_filesystem.inode_operations.get_mode = &smemfs_USB3_get_mode;
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atomic_stop();
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}
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void smemfs_initialize(void)
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{
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// Start atomic operations
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atomic_start();
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// Get / check Casio SMEM sector table
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// @note:
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// Casio SMEM sector table start
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// always (?) at 0xa0270000 (tested with OS 1.00.0000).
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// TODO: return error !!
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smemfs_USB2_superblock.sector_table = (void *)0xa0270000;
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if (smemfs_USB2_superblock.sector_table->magic_start != CASIO_SMEM_BLOCK_ENTRY_MAGIC)
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{
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earlyterm_write("SMEMFS: sector table error !\n");
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return (use_dump_smem_driver());
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}
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// Try to find Casio SMEM inode table start always at the end of
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// the sector table. Normaly start at 0xa0270320 but not always (?)
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int i = -1;
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while (smemfs_USB2_superblock.sector_table[++i].magic_start == CASIO_SMEM_BLOCK_ENTRY_MAGIC);
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// Get the inode table
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// TODO: return error !!
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smemfs_USB2_superblock.inode_table = (void *)&smemfs_USB2_superblock.sector_table[i];
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if ((smemfs_USB2_superblock.inode_table->info != 0x51 &&
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smemfs_USB2_superblock.inode_table->info != 0x01) ||
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smemfs_USB2_superblock.inode_table->parent.id != 0xffff ||
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smemfs_USB2_superblock.inode_table->parent.type != 0xffff)
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{
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earlyterm_write("SMEMFS: Casio inode table error !");
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return (use_dump_smem_driver());
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}
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// Stop atomic operations
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atomic_stop();
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}
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