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path: root/emb/pastilda/hw/usb_device/ramdisk.c
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Diffstat (limited to 'emb/pastilda/hw/usb_device/ramdisk.c')
-rw-r--r--emb/pastilda/hw/usb_device/ramdisk.c160
1 files changed, 0 insertions, 160 deletions
diff --git a/emb/pastilda/hw/usb_device/ramdisk.c b/emb/pastilda/hw/usb_device/ramdisk.c
deleted file mode 100644
index 15ea8a1..0000000
--- a/emb/pastilda/hw/usb_device/ramdisk.c
+++ /dev/null
@@ -1,160 +0,0 @@
-#include <string.h>
-#include "ramdisk.h"
-
-#define WBVAL(x) ((x) & 0xFF), (((x) >> 8) & 0xFF)
-#define QBVAL(x) ((x) & 0xFF), (((x) >> 8) & 0xFF),\
- (((x) >> 16) & 0xFF), (((x) >> 24) & 0xFF)
-
-// filesystem size is 512kB (1024 * SECTOR_SIZE)
-#define SECTOR_COUNT 1024
-#define SECTOR_SIZE 512
-#define BYTES_PER_SECTOR 512
-#define SECTORS_PER_CLUSTER 4
-#define RESERVED_SECTORS 1
-#define FAT_COPIES 2
-#define ROOT_ENTRIES 512
-#define ROOT_ENTRY_LENGTH 32
-#define FILEDATA_START_CLUSTER 3
-#define DATA_REGION_SECTOR (RESERVED_SECTORS + FAT_COPIES + \
- (ROOT_ENTRIES * ROOT_ENTRY_LENGTH) / BYTES_PER_SECTOR)
-#define FILEDATA_START_SECTOR (DATA_REGION_SECTOR + \
- (FILEDATA_START_CLUSTER - 2) * SECTORS_PER_CLUSTER)
-
-// filesize is 64kB (128 * SECTOR_SIZE)
-#define FILEDATA_SECTOR_COUNT 128
-
-uint8_t BootSector[] = {
- 0xEB, 0x3C, 0x90, // code to jump to the bootstrap code
- 'm', 'k', 'd', 'o', 's', 'f', 's', 0x00, // OEM ID
- WBVAL(BYTES_PER_SECTOR), // bytes per sector
- SECTORS_PER_CLUSTER, // sectors per cluster
- WBVAL(RESERVED_SECTORS), // # of reserved sectors (1 boot sector)
- FAT_COPIES, // FAT copies (2)
- WBVAL(ROOT_ENTRIES), // root entries (512)
- WBVAL(SECTOR_COUNT), // total number of sectors
- 0xF8, // media descriptor (0xF8 = Fixed disk)
- 0x01, 0x00, // sectors per FAT (1)
- 0x20, 0x00, // sectors per track (32)
- 0x40, 0x00, // number of heads (64)
- 0x00, 0x00, 0x00, 0x00, // hidden sectors (0)
- 0x00, 0x00, 0x00, 0x00, // large number of sectors (0)
- 0x00, // drive number (0)
- 0x00, // reserved
- 0x29, // extended boot signature
- 0x69, 0x17, 0xAD, 0x53, // volume serial number
- 'R', 'A', 'M', 'D', 'I', 'S', 'K', ' ', ' ', ' ', ' ', // volume label
- 'F', 'A', 'T', '1', '2', ' ', ' ', ' ' // filesystem type
-};
-
-uint8_t FatSector[] = {
- 0xF8, 0xFF, 0xFF, 0x00, 0x40, 0x00, 0x05, 0x60, 0x00, 0x07, 0x80, 0x00,
- 0x09, 0xA0, 0x00, 0x0B, 0xC0, 0x00, 0x0D, 0xE0, 0x00, 0x0F, 0x00, 0x01,
- 0x11, 0x20, 0x01, 0x13, 0x40, 0x01, 0x15, 0x60, 0x01, 0x17, 0x80, 0x01,
- 0x19, 0xA0, 0x01, 0x1B, 0xC0, 0x01, 0x1D, 0xE0, 0x01, 0x1F, 0x00, 0x02,
- 0x21, 0x20, 0x02, 0x23, 0x40, 0x02, 0x25, 0x60, 0x02, 0x27, 0x80, 0x02,
- 0x29, 0xA0, 0x02, 0x2B, 0xC0, 0x02, 0x2D, 0xE0, 0x02, 0x2F, 0x00, 0x03,
- 0x31, 0x20, 0x03, 0x33, 0x40, 0x03, 0x35, 0x60, 0x03, 0x37, 0x80, 0x03,
- 0x39, 0xA0, 0x03, 0x3B, 0xC0, 0x03, 0x3D, 0xE0, 0x03, 0x3F, 0x00, 0x04,
- 0x41, 0x20, 0x04, 0x43, 0x40, 0x04, 0x45, 0x60, 0x04, 0x47, 0x80, 0x04,
- 0x49, 0xA0, 0x04, 0x4B, 0xC0, 0x04, 0x4D, 0xE0, 0x04, 0x4F, 0x00, 0x05,
- 0x51, 0x20, 0x05, 0x53, 0x40, 0x05, 0x55, 0x60, 0x05, 0x57, 0x80, 0x05,
- 0x59, 0xA0, 0x05, 0x5B, 0xC0, 0x05, 0x5D, 0xE0, 0x05, 0x5F, 0x00, 0x06,
- 0x61, 0x20, 0x06, 0x63, 0x40, 0x06, 0x65, 0x60, 0x06, 0x67, 0x80, 0x06,
- 0x69, 0xA0, 0x06, 0x6B, 0xC0, 0x06, 0x6D, 0xE0, 0x06, 0x6F, 0x00, 0x07,
- 0x71, 0x20, 0x07, 0x73, 0x40, 0x07, 0x75, 0x60, 0x07, 0x77, 0x80, 0x07,
- 0x79, 0xA0, 0x07, 0x7B, 0xC0, 0x07, 0x7D, 0xE0, 0x07, 0x7F, 0x00, 0x08,
- 0x81, 0x20, 0x08, 0xFF, 0x0F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00
-};
-
-uint8_t DirSector[] = {
- // long filename entry
- 0x41, // sequence number
- WBVAL('r'), WBVAL('a'), WBVAL('m'), WBVAL('d'), WBVAL('i'), // five name characters in UTF-16
- 0x0F, // attributes
- 0x00, // type
- 0x00, // checksum of DOS filename (computed in ramdisk_init)
- WBVAL('s'), WBVAL('k'), WBVAL('.'), WBVAL('d'), WBVAL('a'), WBVAL('t'), // six name characters in UTF-16
- 0x00, 0x00, // first cluster
- WBVAL(0), WBVAL(0), // two name characters in UTF-16
- // actual entry
- 'R', 'A', 'M', 'D', 'I', 'S', 'K', ' ', // filename
- 'D', 'A', 'T', // extension
- 0x20, // attribute byte
- 0x00, // reserved for Windows NT
- 0x00, // creation millisecond
- 0xCE, 0x01, // creation time
- 0x86, 0x41, // creation date
- 0x86, 0x41, // last access date
- 0x00, 0x00, // reserved for FAT32
- 0xCE, 0x01, // last write time
- 0x86, 0x41, // last write date
- WBVAL(FILEDATA_START_CLUSTER), // start cluster
- QBVAL(FILEDATA_SECTOR_COUNT * SECTOR_SIZE) // file size in bytes
-};
-
-static uint8_t ramdata[FILEDATA_SECTOR_COUNT * SECTOR_SIZE];
-
-int ramdisk_init(void)
-{
- uint32_t i = 0;
-
- // compute checksum in the directory entry
- uint8_t chk = 0;
- for (i = 32; i < 43; i++) {
- chk = (((chk & 1) << 7) | ((chk & 0xFE) >> 1)) + DirSector[i];
- }
- DirSector[13] = chk;
-
- // fill ramdata
- const uint8_t text[] = "USB Mass Storage Class example. ";
- i = 0;
- while (i < sizeof(ramdata)) {
- ramdata[i] = text[i % (sizeof(text) -1)];
- i++;
- }
- return (0);
-}
-
-int ramdisk_read(uint32_t lba, uint8_t *copy_to)
-{
- memset(copy_to, 0, SECTOR_SIZE);
- switch (lba) {
- case 0: // sector 0 is the boot sector
- memcpy(copy_to, BootSector, sizeof(BootSector));
- copy_to[SECTOR_SIZE - 2] = 0x55;
- copy_to[SECTOR_SIZE - 1] = 0xAA;
- break;
- case 1: // sector 1 is FAT 1st copy
- case 2: // sector 2 is FAT 2nd copy
- memcpy(copy_to, FatSector, sizeof(FatSector));
- break;
- case 3: // sector 3 is the directory entry
- memcpy(copy_to, DirSector, sizeof(DirSector));
- break;
- default:
- // ignore reads outside of the data section
- if (lba >= FILEDATA_START_SECTOR && lba < FILEDATA_START_SECTOR + FILEDATA_SECTOR_COUNT) {
- memcpy(copy_to, ramdata + (lba - FILEDATA_START_SECTOR) * SECTOR_SIZE, SECTOR_SIZE);
- }
- break;
- }
- return (0);
-}
-
-int ramdisk_write(uint32_t lba, const uint8_t *copy_from)
-{
- (void)lba;
- (void)copy_from;
- // ignore writes
- return (0);
-}
-
-int ramdisk_blocks(void)
-{
- return (SECTOR_COUNT);
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-15 07:52:50 +0300