Hardware/litex
1
0
Fork 0
mirror of https://github.com/enjoy-digital/litex.git synced 2025-01-04 09:52:26 -05:00
Code Issues Projects Releases Packages Wiki Activity

software/libextra: remove blockdev + fatfs

Browse source
This commit is contained in:
Sebastien Bourdeauducq 2012-05-24 18:51:27 +02:00
parent f6f42293d1
commit 2823034a7b
4 changed files with 0 additions and 772 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

31
software/include/extra/blockdev.h
View file

@ -1,31 +0,0 @@
/*
* Milkymist SoC (Software)
* Copyright (C) 2007, 2008, 2009, 2010 Sebastien Bourdeauducq
*
* 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, version 3 of the License.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef __BLOCKDEV_H
#define __BLOCKDEV_H
enum {
BLOCKDEV_MEMORY_CARD
};
int bd_init(int devnr);
int bd_readblock(unsigned int block, void *buffer);
void bd_done(void);
int bd_has_part_table(int devnr);
#endif /* __BLOCKDEV_H */

28
software/include/extra/fatfs.h
View file

@ -1,28 +0,0 @@
/*
* Milkymist SoC (Software)
* Copyright (C) 2007, 2008, 2009, 2010 Sebastien Bourdeauducq
*
* 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, version 3 of the License.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef __FATFS_H
#define __FATFS_H
typedef int (*fatfs_dir_callback)(const char *, const char *, void *);
int fatfs_init(int devnr);
int fatfs_list_files(fatfs_dir_callback cb, void *param);
int fatfs_load(const char *filename, char *buffer, int size, int *realsize);
void fatfs_done(void);
#endif /* __FATFS_H */

273
software/libextra/blockdev.c
View file

@ -1,273 +0,0 @@
/*
* Milkymist SoC (Software)
* Copyright (C) 2007, 2008, 2009, 2010 Sebastien Bourdeauducq
*
* 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, version 3 of the License.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <hw/flash.h>
#include <hw/memcard.h>
#include <string.h>
#include <blockdev.h>
//#define MEMCARD_DEBUG
static void memcard_start_cmd_tx(void)
{
CSR_MEMCARD_ENABLE = MEMCARD_ENABLE_CMD_TX;
}
static void memcard_start_cmd_rx(void)
{
CSR_MEMCARD_PENDING = MEMCARD_PENDING_CMD_RX;
CSR_MEMCARD_START = MEMCARD_START_CMD_RX;
CSR_MEMCARD_ENABLE = MEMCARD_ENABLE_CMD_RX;
}
static void memcard_start_cmd_dat_rx(void)
{
CSR_MEMCARD_PENDING = MEMCARD_PENDING_CMD_RX|MEMCARD_PENDING_DAT_RX;
CSR_MEMCARD_START = MEMCARD_START_CMD_RX|MEMCARD_START_DAT_RX;
CSR_MEMCARD_ENABLE = MEMCARD_ENABLE_CMD_RX|MEMCARD_ENABLE_DAT_RX;
}
static void memcard_send_command(unsigned char cmd, unsigned int arg)
{
unsigned char packet[6];
int a;
int i;
unsigned char data;
unsigned char crc;
packet[0] = cmd | 0x40;
packet[1] = ((arg >> 24) & 0xff);
packet[2] = ((arg >> 16) & 0xff);
packet[3] = ((arg >> 8) & 0xff);
packet[4] = (arg & 0xff);
crc = 0;
for(a=0;a<5;a++) {
data = packet[a];
for(i=0;i<8;i++) {
crc <<= 1;
if((data & 0x80) ^ (crc & 0x80))
crc ^= 0x09;
data <<= 1;
}
}
crc = (crc<<1) | 1;
packet[5] = crc;
#ifdef MEMCARD_DEBUG
printf(">> %02x %02x %02x %02x %02x %02x\n", packet[0], packet[1], packet[2], packet[3], packet[4], packet[5]);
#endif
for(i=0;i<6;i++) {
CSR_MEMCARD_CMD = packet[i];
while(CSR_MEMCARD_PENDING & MEMCARD_PENDING_CMD_TX);
}
}
static void memcard_send_dummy(void)
{
CSR_MEMCARD_CMD = 0xff;
while(CSR_MEMCARD_PENDING & MEMCARD_PENDING_CMD_TX);
}
static int memcard_receive_command(unsigned char *buffer, int len)
{
int i;
int timeout;
for(i=0;i<len;i++) {
timeout = 2000000;
while(!(CSR_MEMCARD_PENDING & MEMCARD_PENDING_CMD_RX)) {
timeout--;
if(timeout == 0) {
#ifdef MEMCARD_DEBUG
printf("Command receive timeout\n");
#endif
return 0;
}
}
buffer[i] = CSR_MEMCARD_CMD;
CSR_MEMCARD_PENDING = MEMCARD_PENDING_CMD_RX;
}
while(!(CSR_MEMCARD_PENDING & MEMCARD_PENDING_CMD_RX));
#ifdef MEMCARD_DEBUG
printf("<< ");
for(i=0;i<len;i++)
printf("%02x ", buffer[i]);
printf("\n");
#endif
return 1;
}
static int memcard_receive_command_data(unsigned char *command, unsigned int *data)
{
int i, j;
int timeout;
i = 0;
j = 0;
while(j < 128) {
timeout = 2000000;
while(!(CSR_MEMCARD_PENDING & (MEMCARD_PENDING_CMD_RX|MEMCARD_PENDING_DAT_RX))) {
timeout--;
if(timeout == 0) {
#ifdef MEMCARD_DEBUG
printf("Command receive timeout\n");
#endif
return 0;
}
}
if(CSR_MEMCARD_PENDING & MEMCARD_PENDING_CMD_RX) {
command[i++] = CSR_MEMCARD_CMD;
CSR_MEMCARD_PENDING = MEMCARD_PENDING_CMD_RX;
if(i == 6)
CSR_MEMCARD_ENABLE = MEMCARD_ENABLE_DAT_RX; /* disable command RX */
}
if(CSR_MEMCARD_PENDING & MEMCARD_PENDING_DAT_RX) {
data[j++] = CSR_MEMCARD_DAT;
CSR_MEMCARD_PENDING = MEMCARD_PENDING_DAT_RX;
}
}
/* Get CRC (ignored) */
for(i=0;i<2;i++) {
while(!(CSR_MEMCARD_PENDING & MEMCARD_PENDING_DAT_RX));
#ifdef MEMCARD_DEBUG
printf("CRC: %08x\n", CSR_MEMCARD_DAT);
#endif
CSR_MEMCARD_PENDING = MEMCARD_PENDING_DAT_RX;
}
while(!(CSR_MEMCARD_PENDING & MEMCARD_PENDING_DAT_RX));
#ifdef MEMCARD_DEBUG
printf("<< %02x %02x %02x %02x %02x %02x\n", command[0], command[1], command[2], command[3], command[4], command[5]);
#endif
//for(i=0;i<128;i++)
// printf("%08x ", data[i]);
//printf("\n");
return 1;
}
static int memcard_init(void)
{
unsigned char b[17];
unsigned int rca;
CSR_MEMCARD_CLK2XDIV = 250;
/* CMD0 */
memcard_start_cmd_tx();
memcard_send_command(0, 0);
memcard_send_dummy();
/* CMD8 */
memcard_send_command(8, 0x1aa);
memcard_start_cmd_rx();
if(!memcard_receive_command(b, 6)) return 0;
/* ACMD41 - initialize */
while(1) {
memcard_start_cmd_tx();
memcard_send_command(55, 0);
memcard_start_cmd_rx();
if(!memcard_receive_command(b, 6)) return 0;
memcard_start_cmd_tx();
memcard_send_command(41, 0x00300000);
memcard_start_cmd_rx();
if(!memcard_receive_command(b, 6)) return 0;
if(b[1] & 0x80) break;
#ifdef MEMCARD_DEBUG
printf("Card is busy, retrying\n");
#endif
}
/* CMD2 - get CID */
memcard_start_cmd_tx();
memcard_send_command(2, 0);
memcard_start_cmd_rx();
if(!memcard_receive_command(b, 17)) return 0;
/* CMD3 - get RCA */
memcard_start_cmd_tx();
memcard_send_command(3, 0);
memcard_start_cmd_rx();
if(!memcard_receive_command(b, 6)) return 0;
rca = (((unsigned int)b[1]) << 8)|((unsigned int)b[2]);
#ifdef MEMCARD_DEBUG
printf("RCA: %04x\n", rca);
#endif
/* CMD7 - select card */
memcard_start_cmd_tx();
memcard_send_command(7, rca << 16);
memcard_start_cmd_rx();
if(!memcard_receive_command(b, 6)) return 0;
/* ACMD6 - set bus width */
memcard_start_cmd_tx();
memcard_send_command(55, rca << 16);
memcard_start_cmd_rx();
if(!memcard_receive_command(b, 6)) return 0;
memcard_start_cmd_tx();
memcard_send_command(6, 2);
memcard_start_cmd_rx();
if(!memcard_receive_command(b, 6)) return 0;
CSR_MEMCARD_CLK2XDIV = 3;
return 1;
}
static int memcard_readblock(unsigned int block, void *buffer)
{
unsigned char b[6];
/* CMD17 - read block */
memcard_start_cmd_tx();
memcard_send_command(17, block*512);
memcard_start_cmd_dat_rx();
if(!memcard_receive_command_data(b, (unsigned int *)buffer)) return 0;
return 1;
}
int bd_init(int devnr)
{
return memcard_init();
}
int bd_readblock(unsigned int block, void *buffer)
{
return memcard_readblock(block, buffer);
}
void bd_done(void)
{
}
int bd_has_part_table(int devnr)
{
return 1;
}

440
software/libextra/fatfs.c
View file

@ -1,440 +0,0 @@
/*
* Milkymist SoC (Software)
* Copyright (C) 2007, 2008, 2009, 2010 Sebastien Bourdeauducq
*
* 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, version 3 of the License.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <endian.h>
#include <console.h>
#include <blockdev.h>
#include <fatfs.h>
//#define DEBUG
#define BLOCK_SIZE 512
struct partition_descriptor {
unsigned char flags;
unsigned char start_head;
unsigned short start_cylinder;
unsigned char type;
unsigned char end_head;
unsigned short end_cylinder;
unsigned int start_sector;
unsigned int end_sector;
} __attribute__((packed));
struct firstsector {
unsigned char bootsector[446];
struct partition_descriptor partitions[4];
unsigned char signature[2];
} __attribute__((packed));
struct fat16_firstsector {
/* Common to FATxx */
char jmp[3];
char oem[8];
unsigned short bytes_per_sector;
unsigned char sectors_per_cluster;
unsigned short reserved_sectors;
unsigned char number_of_fat;
unsigned short max_root_entries;
unsigned short total_sectors_short;
unsigned char media_descriptor;
unsigned short sectors_per_fat;
unsigned short sectors_per_track;
unsigned short head_count;
unsigned int hidden_sectors;
unsigned int total_sectors;
/* FAT16 specific */
unsigned char drive_nr;
unsigned char reserved;
unsigned char ext_boot_signature;
unsigned int id;
unsigned char volume_label[11];
unsigned char fstype[8];
unsigned char bootcode[448];
unsigned char signature[2];
} __attribute__((packed));
struct directory_entry {
unsigned char filename[8];
unsigned char extension[3];
unsigned char attributes;
unsigned char reserved;
unsigned char create_time_ms;
unsigned short create_time;
unsigned short create_date;
unsigned short last_access;
unsigned short ea_index;
unsigned short lastm_time;
unsigned short lastm_date;
unsigned short first_cluster;
unsigned int file_size;
} __attribute__((packed));
struct directory_entry_lfn {
unsigned char seq;
unsigned short name1[5]; /* UTF16 */
unsigned char attributes;
unsigned char reserved;
unsigned char checksum;
unsigned short name2[6];
unsigned short first_cluster;
unsigned short name3[2];
} __attribute__((packed));
#define PARTITION_TYPE_FAT16 0x06
#define PARTITION_TYPE_FAT32 0x0b
static int fatfs_partition_start_sector; /* Sector# of the beginning of the FAT16 partition */
static int fatfs_sectors_per_cluster;
static int fatfs_fat_sector; /* Sector of the first FAT */
static int fatfs_fat_entries; /* Number of entries in the FAT */
static int fatfs_max_root_entries;
static int fatfs_root_table_sector; /* Sector# of the beginning of the root table */
static int fatfs_fat_cached_sector;
static unsigned short int fatfs_fat_sector_cache[BLOCK_SIZE/2];
static int fatfs_dir_cached_sector;
static struct directory_entry fatfs_dir_sector_cache[BLOCK_SIZE/sizeof(struct directory_entry)];
static int fatfs_data_start_sector;
int fatfs_init(int devnr)
{
struct firstsector s0;
struct fat16_firstsector s;
int i;
if(!bd_init(devnr)) {
printf("E: Unable to initialize memory card driver\n");
return 0;
}
if(bd_has_part_table(devnr)) {
/* Read sector 0, with partition table */
if(!bd_readblock(0, (void *)&s0)) {
printf("E: Unable to read block 0\n");
return 0;
}
fatfs_partition_start_sector = -1;
for(i=0;i<4;i++)
if((s0.partitions[i].type == PARTITION_TYPE_FAT16)
||(s0.partitions[i].type == PARTITION_TYPE_FAT32)) {
#ifdef DEBUG
printf("I: Using partition #%d: start sector %08x, end sector %08x\n", i,
le32toh(s0.partitions[i].start_sector), le32toh(s0.partitions[i].end_sector));
#endif
fatfs_partition_start_sector = le32toh(s0.partitions[i].start_sector);
break;
}
if(fatfs_partition_start_sector == -1) {
printf("E: No FAT partition was found\n");
return 0;
}
} else
fatfs_partition_start_sector = 0;
/* Read first FAT16 sector */
if(!bd_readblock(fatfs_partition_start_sector, (void *)&s)) {
printf("E: Unable to read first FAT sector\n");
return 0;
}
#ifdef DEBUG
{
char oem[9];
char volume_label[12];
memcpy(oem, s.oem, 8);
oem[8] = 0;
memcpy(volume_label, s.volume_label, 11);
volume_label[11] = 0;
printf("I: OEM name: %s\n", oem);
printf("I: Volume label: %s\n", volume_label);
}
#endif
if(le16toh(s.bytes_per_sector) != BLOCK_SIZE) {
printf("E: Unexpected number of bytes per sector (%d)\n", le16toh(s.bytes_per_sector));
return 0;
}
fatfs_sectors_per_cluster = s.sectors_per_cluster;
fatfs_fat_entries = (le16toh(s.sectors_per_fat)*BLOCK_SIZE)/2;
fatfs_fat_sector = fatfs_partition_start_sector + 1;
fatfs_fat_cached_sector = -1;
fatfs_max_root_entries = le16toh(s.max_root_entries);
fatfs_root_table_sector = fatfs_fat_sector + s.number_of_fat*le16toh(s.sectors_per_fat);
fatfs_dir_cached_sector = -1;
fatfs_data_start_sector = fatfs_root_table_sector + (fatfs_max_root_entries*sizeof(struct directory_entry))/BLOCK_SIZE;
if(fatfs_max_root_entries == 0) {
printf("E: Your memory card uses FAT32, which is not supported.\n");
printf("E: Please reformat your card using FAT16, e.g. use mkdosfs -F 16\n");
printf("E: FAT32 support would be an appreciated contribution.\n");
return 0;
}
#ifdef DEBUG
printf("I: Cluster is %d sectors, FAT has %d entries, FAT 1 is at sector %d,\nI: root table is at sector %d (max %d), data is at sector %d, nb of fat: %d\n",
fatfs_sectors_per_cluster, fatfs_fat_entries, fatfs_fat_sector,
fatfs_root_table_sector, fatfs_max_root_entries,
fatfs_data_start_sector, s.number_of_fat);
#endif
return 1;
}
static int fatfs_read_fat(int offset)
{
int wanted_sector;
if((offset < 0) || (offset >= fatfs_fat_entries)) {
printf("E: Incorrect offset %d in fatfs_read_fat\n", offset);
return -1;
}
wanted_sector = fatfs_fat_sector + (offset*2)/BLOCK_SIZE;
if(wanted_sector != fatfs_fat_cached_sector) {
if(!bd_readblock(wanted_sector, (void *)&fatfs_fat_sector_cache)) {
printf("E: Memory card failed (FAT), sector %d\n", wanted_sector);
return -1;
}
fatfs_fat_cached_sector = wanted_sector;
}
return le16toh(fatfs_fat_sector_cache[offset % (BLOCK_SIZE/2)]);
}
static const struct directory_entry *fatfs_read_root_directory(int offset)
{
int wanted_sector;
if((offset < 0) || (offset >= fatfs_max_root_entries))
return NULL;
wanted_sector = fatfs_root_table_sector + (offset*sizeof(struct directory_entry))/BLOCK_SIZE;
if(wanted_sector != fatfs_dir_cached_sector) {
if(!bd_readblock(wanted_sector, (void *)&fatfs_dir_sector_cache)) {
printf("E: Memory card failed (Rootdir), sector %d\n", wanted_sector);
return NULL;
}
fatfs_dir_cached_sector = wanted_sector;
}
return &fatfs_dir_sector_cache[offset % (BLOCK_SIZE/sizeof(struct directory_entry))];
}
static void lfn_to_ascii(const struct directory_entry_lfn *entry, char *name, int terminate)
{
int i;
unsigned short c;
for(i=0;i<5;i++) {
c = le16toh(entry->name1[i]);
if(c <= 255) {
*name = c;
name++;
if(c == 0) return;
}
}
for(i=0;i<6;i++) {
c = le16toh(entry->name2[i]);
if(c <= 255) {
*name = c;
name++;
if(c == 0) return;
}
}
for(i=0;i<2;i++) {
c = le16toh(entry->name3[i]);
if(c <= 255) {
*name = c;
name++;
if(c == 0) return;
}
}
if(terminate)
*name = 0;
}
static int fatfs_is_regular(const struct directory_entry *entry)
{
return ((entry->attributes & 0x10) == 0)
&& ((entry->attributes & 0x08) == 0)
&& (entry->filename[0] != 0xe5);
}
int fatfs_list_files(fatfs_dir_callback cb, void *param)
{
const struct directory_entry *entry;
char fmtbuf[8+1+3+1];
char longname[131];
int has_longname;
int i, j, k;
has_longname = 0;
longname[sizeof(longname)-1] = 0; /* avoid crashing when reading a corrupt FS */
for(k=0;k<fatfs_max_root_entries;k++) {
entry = fatfs_read_root_directory(k);
#ifdef DEBUG
printf("I: Read entry with attribute %02x\n", entry->attributes);
#endif
if(entry->attributes == 0x0f) {
const struct directory_entry_lfn *entry_lfn;
unsigned char frag;
int terminate;
entry_lfn = (const struct directory_entry_lfn *)entry;
frag = entry_lfn->seq & 0x3f;
terminate = entry_lfn->seq & 0x40;
if(frag*13 < sizeof(longname)) {
lfn_to_ascii((const struct directory_entry_lfn *)entry, &longname[(frag-1)*13], terminate);
if(frag == 1) has_longname = 1;
}
continue;
} else {
if(!fatfs_is_regular(entry)) {
has_longname = 0;
continue;
}
}
if(entry == NULL) return 0;
if(entry->filename[0] == 0) {
has_longname = 0;
break;
}
j = 0;
for(i=0;i<8;i++) {
if(entry->filename[i] == ' ') break;
fmtbuf[j++] = entry->filename[i];
}
fmtbuf[j++] = '.';
for(i=0;i<3;i++) {
if(entry->extension[i] == ' ') break;
fmtbuf[j++] = entry->extension[i];
}
fmtbuf[j++] = 0;
if(!cb(fmtbuf, has_longname ? longname : fmtbuf, param)) return 0;
has_longname = 0;
}
return 1;
}
static const struct directory_entry *fatfs_find_file_by_name(const char *filename)
{
char searched_filename[8];
char searched_extension[3];
char *dot;
const char *c;
int i;
const struct directory_entry *entry;
dot = strrchr(filename, '.');
if(dot == NULL)
return NULL;
memset(searched_filename, ' ', 8);
memset(searched_extension, ' ', 3);
i = 0;
for(c=filename;c<dot;c++)
searched_filename[i++] = toupper(*c);
i = 0;
for(c=dot+1;*c!=0;c++)
searched_extension[i++] = toupper(*c);
for(i=0;i<fatfs_max_root_entries;i++) {
entry = fatfs_read_root_directory(i);
if(entry == NULL) break;
if(entry->filename[0] == 0) break;
if(!fatfs_is_regular(entry)) continue;
if(!memcmp(searched_filename, entry->filename, 8)
&&!memcmp(searched_extension, entry->extension, 3))
return entry;
}
return NULL;
}
static int fatfs_load_cluster(int clustern, char *buffer, int maxsectors)
{
int startsector;
int i;
int toread;
clustern = clustern - 2;
startsector = fatfs_data_start_sector + clustern*fatfs_sectors_per_cluster;
if(maxsectors < fatfs_sectors_per_cluster)
toread = maxsectors;
else
toread = fatfs_sectors_per_cluster;
for(i=0;i<toread;i++)
if(!bd_readblock(startsector+i, (unsigned char *)buffer+i*BLOCK_SIZE)) {
printf("E: Memory card failed (Cluster), sector %d\n", startsector+i);
return 0;
}
return 1;
}
int fatfs_load(const char *filename, char *buffer, int size, int *realsize)
{
const struct directory_entry *entry;
int cluster_size;
int cluster;
int n;
cluster_size = fatfs_sectors_per_cluster*BLOCK_SIZE;
size /= BLOCK_SIZE;
entry = fatfs_find_file_by_name(filename);
if(entry == NULL) {
printf("E: File not found: %s\n", filename);
return 0;
}
if(realsize != NULL) *realsize = le32toh(entry->file_size);
n = 0;
cluster = le16toh(entry->first_cluster);
while(size > 0) {
if(!fatfs_load_cluster(cluster, buffer+n*cluster_size, size))
return 0;
size -= fatfs_sectors_per_cluster;
n++;
cluster = fatfs_read_fat(cluster);
if(cluster >= 0xFFF8) break;
if(cluster == -1) return 0;
}
//putsnonl("\n");
return n*cluster_size;
}
void fatfs_done(void)
{
bd_done();
}