contiki/cpu/arm/stm32f103/sdcard-arch.c

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2009-07-12 15:52:28 +00:00
#include <stm32f10x_map.h>
#include <sdcard.h>
#include <sys/process.h>
#include <sys/etimer.h>
#include <cfs/cfs.h>
#include <efs.h>
#include <ls.h>
#include <interfaces/sd.h>
#include <gpio.h>
#include <stdio.h>
process_event_t sdcard_inserted_event;
process_event_t sdcard_removed_event;
static struct process *event_process = NULL;
#if 0
#undef TXT
#define TXT(x) x
#undef DBG
#define DBG(x) printf x
#endif
static void
init_spi()
{
SPI1->CR1 &= ~SPI_CR1_SPE;
RCC->APB2ENR |= RCC_APB2ENR_IOPAEN;
GPIO_CONF_INPUT_PORT(A,0,FLOATING);
GPIO_CONF_INPUT_PORT(A,1,FLOATING);
GPIO_CONF_OUTPUT_PORT(A,4,PUSH_PULL,50);
GPIOA->BSRR = GPIO_BSRR_BS4;
GPIO_CONF_OUTPUT_PORT(A,5,ALT_PUSH_PULL,50);
GPIO_CONF_INPUT_PORT(A,6,FLOATING);
GPIO_CONF_OUTPUT_PORT(A,7,ALT_PUSH_PULL,50);
RCC->APB2ENR |= RCC_APB2ENR_SPI1EN;
SPI1->CR2 = SPI_CR2_SSOE;
SPI1->CR1 = (SPI_CR1_SPE
| (SPI_CR1_BR_2) /* fPCLK / 32 */
| SPI_CR1_MSTR
| SPI_CR1_CPOL | SPI_CR1_CPHA
| SPI_CR1_SSM | SPI_CR1_SSI);
}
void
if_spiInit(hwInterface *iface)
{
unsigned int i;
GPIOA->BSRR = GPIO_BSRR_BS4;
for(i=0;i<20;i++) {
if_spiSend(iface, 0xff);
}
GPIOA->BSRR = GPIO_BSRR_BR4;
}
/* Borrowed from at91_spi.c (c)2006 Martin Thomas */
esint8
if_initInterface(hwInterface* file, eint8* opts)
{
euint32 sc;
if_spiInit(file);
if(sd_Init(file)<0) {
DBG((TXT("Card failed to init, breaking up...\n")));
return(-1);
}
if(sd_State(file)<0){
DBG((TXT("Card didn't return the ready state, breaking up...\n")
));
return(-2);
}
sd_getDriveSize(file, &sc);
file->sectorCount = sc/512;
DBG((TXT("Card Capacity is %lu Bytes (%lu Sectors)\n"), sc, file->sectorCount));
return(0);
}
/* Borrowed from lpc2000_spi.c (c)2005 Martin Thomas */
esint8
if_readBuf(hwInterface* file,euint32 address,euint8* buf)
{
return(sd_readSector(file,address,buf,512));
}
esint8
if_writeBuf(hwInterface* file,euint32 address,euint8* buf)
{
return(sd_writeSector(file,address, buf));
}
esint8
if_setPos(hwInterface* file,euint32 address)
{
return(0);
}
euint8
if_spiSend(hwInterface *iface, euint8 outgoing)
{
euint8 ingoing;
SPI1->DR = outgoing;
while(!(SPI1->SR & SPI_SR_RXNE));
ingoing = SPI1->DR;
/* printf(">%02x <%02x\n", outgoing, ingoing); */
return ingoing;
}
#define MAX_FDS 4
static EmbeddedFileSystem sdcard_efs;
static File file_descriptors[MAX_FDS];
static int
find_free_fd()
{
int fd;
for (fd = 0; fd < MAX_FDS; fd++) {
if (!file_getAttr(&file_descriptors[fd], FILE_STATUS_OPEN)) {
return fd;
}
}
return -1;
}
static File *
get_file(int fd)
{
if (sdcard_efs.myCard.sectorCount == 0) return NULL;
if (fd >= MAX_FDS || fd < 0) return NULL;
if (!file_getAttr(&file_descriptors[fd], FILE_STATUS_OPEN)) return NULL;
return &file_descriptors[fd];
}
int
cfs_open (const char *name, int flags)
{
eint8 mode;
int fd;
if (sdcard_efs.myCard.sectorCount == 0) return -1;
fd = find_free_fd();
if (fd < 0) return -1;
if (flags == CFS_READ) {
mode = MODE_READ;
} else {
mode = MODE_APPEND;
}
if (file_fopen(&file_descriptors[fd], &sdcard_efs.myFs,
(char*)name, mode) < 0) {
return -1;
}
return fd;
}
void
cfs_close(int fd)
{
File *file = get_file(fd);
if (!file) return;
file_fclose(file);
fs_flushFs(&sdcard_efs.myFs);
}
int
cfs_read (int fd, void *buf, unsigned int len)
{
File *file = get_file(fd);
if (!file) return 0;
return file_read(file, len, (euint8*)buf);
}
int
cfs_write (int fd, const void *buf, unsigned int len)
{
File *file = get_file(fd);
if (!file) return 0;
return file_write(file, len, (euint8*)buf);
}
cfs_offset_t
cfs_seek (int fd, cfs_offset_t offset, int whence)
{
File *file = get_file(fd);
if (!file) return 0;
/* TODO take whence int account */
if (file_setpos(file, offset) != 0) return -1;
return file->FilePtr;
}
int
cfs_remove(const char *name)
{
return (rmfile(&sdcard_efs.myFs,(euint8*)name) == 0) ? 0 : -1;
}
/* Cause a compile time error if expr is false */
#ifdef __GNUC__
#define COMPILE_TIME_CHECK(expr) \
(void) (__builtin_choose_expr ((expr), 0, ((void)0))+3)
#else
#define COMPILE_TIME_CHECK(expr)
#endif
#define MAX_DIR_LISTS 4
DirList dir_lists[MAX_DIR_LISTS];
static DirList *
find_free_dir_list()
{
unsigned int l;
for(l = 0; l < MAX_DIR_LISTS; l++) {
if (dir_lists[l].fs == NULL) {
return &dir_lists[l];
}
}
return NULL;
}
int
cfs_opendir (struct cfs_dir *dirp, const char *name)
{
DirList *dirs;
COMPILE_TIME_CHECK(sizeof(DirList*) <= sizeof(struct cfs_dir));
if (sdcard_efs.myCard.sectorCount == 0) return -1;
dirs = find_free_dir_list();
if (!dirs) return -1;
if (ls_openDir(dirs, &sdcard_efs.myFs, (eint8*)name) != 0) {
dirs->fs = NULL;
return -1;
}
*(DirList**)dirp = dirs;
return 0;
}
int
cfs_readdir (struct cfs_dir *dirp, struct cfs_dirent *dirent)
{
euint8 *start;
euint8 *end;
char *to = dirent->name;
DirList *dirs = *(DirList**)dirp;
if (sdcard_efs.myCard.sectorCount == 0) return 1;
if (ls_getNext(dirs) != 0) return 1;
start = dirs->currentEntry.FileName;
end = start + 7;
while(end > start) {
if (*end > ' ') {
end++;
break;
}
end--;
}
while(start < end) {
*to++ = *start++;
}
start = dirs->currentEntry.FileName + 8;
end = start + 3;
if (*start > ' ') {
*to++ = '.';
*to++ = *start++;
while(start < end && *start > ' ') {
*to++ = *start++;
}
}
*to = '\0';
if (dirs->currentEntry.Attribute & ATTR_DIRECTORY) {
dirent->size = 0;
} else {
dirent->size = dirs->currentEntry.FileSize;
}
return 0;
}
void
cfs_closedir (struct cfs_dir *dirp)
{
(*(DirList**)dirp)->fs = NULL;
}
PROCESS(sdcard_process, "SD card process");
PROCESS_THREAD(sdcard_process, ev , data)
{
int fd;
static struct etimer timer;
PROCESS_BEGIN();
/* Mark all file descriptors as free */
for (fd = 0; fd < MAX_FDS; fd++) {
file_setAttr(&file_descriptors[fd], FILE_STATUS_OPEN,0);
}
/* Card not inserted */
sdcard_efs.myCard.sectorCount = 0;
init_spi();
etimer_set(&timer, CLOCK_SECOND);
while(1) {
PROCESS_WAIT_EVENT_UNTIL(ev == PROCESS_EVENT_EXIT ||
ev== PROCESS_EVENT_TIMER || ev == PROCESS_EVENT_POLL);
if (ev == PROCESS_EVENT_EXIT) break;
if (ev == PROCESS_EVENT_TIMER) {
if (!(GPIOA->IDR & (1<<0))) {
if (sdcard_efs.myCard.sectorCount == 0) {
etimer_set(&timer,CLOCK_SECOND/2);
PROCESS_WAIT_EVENT_UNTIL(ev== PROCESS_EVENT_TIMER);
if (efs_init(&sdcard_efs,0) == 0) {
if (event_process) {
process_post(event_process, sdcard_inserted_event, NULL);
}
printf("SD card inserted\n");
} else {
printf("SD card insertion failed\n");
}
}
} else {
if (sdcard_efs.myCard.sectorCount != 0) {
/* Card removed */
fs_umount(&sdcard_efs.myFs);
sdcard_efs.myCard.sectorCount = 0;
if (event_process) {
process_post(event_process, sdcard_removed_event, NULL);
}
printf("SD card removed\n");
}
}
etimer_set(&timer, CLOCK_SECOND);
}
}
PROCESS_END();
}
void
sdcard_init()
{
sdcard_inserted_event = process_alloc_event();
sdcard_removed_event = process_alloc_event();
process_start(&sdcard_process, NULL);
}
int
sdcard_ready()
{
return sdcard_efs.myCard.sectorCount > 0;
}
void
sdcard_event_process(struct process *p)
{
event_process = p;
}