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SAROO/Firm_v11_STM32/stm32_sdio.c
tpu e94a66d26d update Firm_v11_STM32
2023-02-13 17:25:51 +08:00

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/*
* stm32_sdio.c
* low level driver for STM32F10x SDIO
* only SD card suport. no MMC support.
*
* writen by tpu, 2014-10-28
*/
#include "string.h"
#include "main.h"
/******************************************************************************/
#define SDCLK_LOW 198
#define SDCLK_HIGH 3 // 24MHz
//#define SDCLK_HIGH 4 // 18MHz
//#define SDCLK_HIGH 6 // 12MHz
#define RESP_NONE(cmd) ((cmd&0x00c0)==0x0000)
#define RESP_SHORT(cmd) ((cmd&0x00c0)==0x0040)
#define RESP_LONG(cmd) ((cmd&0x00c0)==0x00c0)
#define RESP_NOCRC(cmd) ((cmd&0x0400)!=0x0000)
#define HAS_DATA_R(cmd) ((cmd&0x0100)==0x0100)
#define HAS_DATA_W(cmd) ((cmd&0x0200)==0x0200)
#define HAS_DATA(cmd) ((cmd&0x0300)!=0x0000)
#define NO_DATA(cmd) ((cmd&0x0300)==0x0000)
#define CMD_RESP_NONE 0x0000
#define CMD_RESP_SHORT 0x0040
#define CMD_RESP_LONG 0x00c0
#define CMD_RESP_NOCRC 0x0400
#define CMD_HAS_DATA_R 0x0100
#define CMD_HAS_DATA_W 0x0200
#define CMD_00 ( 0 | CMD_RESP_NONE)
#define CMD_02 ( 2 | CMD_RESP_LONG | CMD_RESP_NOCRC)
#define CMD_03 ( 3 | CMD_RESP_SHORT)
#define CMD_06 ( 6 | CMD_RESP_SHORT)
#define CMD_07 ( 7 | CMD_RESP_SHORT)
#define CMD_08 ( 8 | CMD_RESP_SHORT)
#define CMD_09 ( 9 | CMD_RESP_LONG | CMD_RESP_NOCRC)
#define CMD_12 (12 | CMD_RESP_SHORT)
#define CMD_13 (13 | CMD_RESP_SHORT)
#define CMD_16 (16 | CMD_RESP_SHORT)
#define CMD_17 (17 | CMD_RESP_SHORT | CMD_HAS_DATA_R)
#define CMD_18 (18 | CMD_RESP_SHORT | CMD_HAS_DATA_R)
#define CMD_23 (23 | CMD_RESP_SHORT)
#define CMD_24 (24 | CMD_RESP_SHORT | CMD_HAS_DATA_W)
#define CMD_25 (25 | CMD_RESP_SHORT | CMD_HAS_DATA_W)
#define CMD_41 (41 | CMD_RESP_SHORT | CMD_RESP_NOCRC)
#define CMD_55 (55 | CMD_RESP_SHORT)
#define CMD_ERROR (SDIO_STA_CTIMEOUT | SDIO_STA_CCRCFAIL)
#define DATA_ERROR (SDIO_STA_STBITERR | SDIO_STA_RXOVERR | SDIO_STA_TXUNDERR | SDIO_STA_DTIMEOUT | SDIO_STA_DCRCFAIL)
/******************************************************************************/
static u32 cmd_resp[4];
static u8 sd_cid[16];
static u8 sd_csd[16];
static int is_sdhc;
static int sd_rca;
static int bsize;
static int csize;
static int cblock;
static OS_SEM cmd_sem;
/******************************************************************************/
static void sd_clk_set(int div)
{
u32 val;
val = SDIO->CLKCR;
val &= 0xfffffd00;
val |= div;
if(div!=SDCLK_LOW){
//val |= 0x0200;
}
SDIO->CLKCR = val;
}
static void sd_clk_enable(int en)
{
if(en)
SDIO->CLKCR |= 0x0100;
else
SDIO->CLKCR &= ~0x0100;
}
static void sd_bus_width(int width)
{
u32 val;
val = SDIO->CLKCR;
val &= 0xffffe7ff;
if(width==4)
val |= 0x00000800;
SDIO->CLKCR = val;
}
static void sd_power_on(int on)
{
if(on)
SDIO->POWER = 0x00000003;
else
SDIO->POWER = 0x00000000;
}
static int sd_card_insert(void)
{
return (GPIOA->IDR&0x8000)? 0: 1;
}
/******************************************************************************/
void SDIO_IRQHandler(void)
{
SDIO->MASK = 0;
isr_sem_send(&cmd_sem);
}
static int sd_cmd(u32 cmd, u32 arg)
{
u32 mask, stat;
int retv;
if(HAS_DATA(cmd)){
mask = SDIO_STA_DATAEND | DATA_ERROR | CMD_ERROR;
}else if(RESP_NONE(cmd)){
mask = SDIO_STA_CMDSENT | CMD_ERROR;
}else{
mask = SDIO_STA_CMDREND | CMD_ERROR;
}
SDIO->MASK = mask;
SDIO->ARG = arg;
SDIO->CMD = 0x0400|(cmd&0x00ff);
retv = os_sem_wait(&cmd_sem, 0x8000);
if(retv==OS_R_TMO){
printk("sd_cmd: irq timeout!\n");
stat = 0xffffffff;
goto _exit;
}
stat = SDIO->STA;
if(RESP_NOCRC(cmd)){
stat &= 0xfffffffe;
}
if(stat&(CMD_ERROR|DATA_ERROR)){
// CMD or DATA error
printk("sd_cmd: CMD_%02d error %08x!\n", (cmd&0x3f), stat);
goto _exit;
}
stat = 0;
if(RESP_SHORT(cmd)){
cmd_resp[0] = SDIO->RESP1;
}else if(RESP_LONG(cmd)){
cmd_resp[0] = SDIO->RESP4;
cmd_resp[1] = SDIO->RESP3;
cmd_resp[2] = SDIO->RESP2;
cmd_resp[3] = SDIO->RESP1;
}
if(HAS_DATA(cmd)){
while(DMA2_Channel4->CNDTR);
}
_exit:
DMA2_Channel4->CCR = 0;
SDIO->DCTRL = 0;
SDIO->MASK = 0;
SDIO->CMD = 0;
SDIO->ICR = 0x000007ff;
return stat;
}
static int sd_acmd(u32 cmd, u32 arg)
{
int retv;
retv = sd_cmd(CMD_55, sd_rca<<16);
if(retv)
return retv;
retv = sd_cmd(cmd, arg);
return retv;
}
/******************************************************************************/
int sd_read_blocks(u32 block, int count, u8 *buf)
{
int retv, dsize;
dsize = count*512;
SDIO->DTIMER = 0x0fffffff;
SDIO->DLEN = dsize;
SDIO->DCTRL = 0x0000009b;
DMA2_Channel4->CCR = 0;
DMA2_Channel4->CNDTR = dsize/4;
DMA2_Channel4->CPAR = (u32)&(SDIO->FIFO);
DMA2_Channel4->CMAR = (u32)buf;
DMA2_Channel4->CCR = 0x2a81;
if(!is_sdhc)
block *= 512;
if(count==1){
retv = sd_cmd(CMD_17, block);
}else{
retv = sd_cmd(CMD_18, block);
if(retv==0){
retv = sd_cmd(CMD_12, 0);
}
}
return retv;
}
int sd_write_blocks(u32 block, int count, u8 *buf)
{
int retv, dsize;
dsize = count*512;
SDIO->DTIMER = 0x0fffffff;
SDIO->DLEN = dsize;
SDIO->DCTRL = 0x00000099;
DMA2_Channel4->CCR = 0;
DMA2_Channel4->CNDTR = dsize/4;
DMA2_Channel4->CPAR = (u32)&(SDIO->FIFO);
DMA2_Channel4->CMAR = (u32)buf;
DMA2_Channel4->CCR = 0x2a91;
if(!is_sdhc)
block *= 512;
if(count==1){
retv = sd_cmd(CMD_24, block);
}else{
retv = sd_acmd(CMD_23, count);
if(retv){
return retv;
}
retv = sd_cmd(CMD_25, block);
if(retv==0){
retv = sd_cmd(CMD_12, 0);
}
}
return retv;
}
/******************************************************************************/
#if 0
#define SDBUF_SIZE 8
static u8 sdbuf[SDBUF_SIZE*512];
int sd_read_sector(u32 start, int size, u8 *buf)
{
int rsize, retv;
u32 type = ((u32)buf)>>24;
if(sd_rca==0)
return -1;
if(type==0x20){
return sd_read_blocks(start, size, buf);
}
while(size){
rsize = (size>SDBUF_SIZE)? SDBUF_SIZE : size;
retv = sd_read_blocks(start, rsize, sdbuf);
if(retv)
return retv;
memcpy(buf, sdbuf, rsize*512);
buf += rsize*512;
size -= rsize;
start += rsize;
}
return 0;
}
int sd_write_sector(u32 start, int size, u8 *buf)
{
int rsize, retv;
u32 type = ((u32)buf)>>24;
if(sd_rca==0)
return -1;
if(type==0x20){
return sd_write_blocks(start, size, buf);
}
while(size){
rsize = (size>SDBUF_SIZE)? SDBUF_SIZE : size;
memcpy(sdbuf, buf, rsize*512);
retv = sd_write_blocks(start, rsize, sdbuf);
if(retv)
return retv;
buf += rsize*512;
size -= rsize;
start += rsize;
}
return 0;
}
#else
int sd_read_sector(u32 start, int size, u8 *buf)
{
return sd_read_blocks(start, size, buf);
}
int sd_write_sector(u32 start, int size, u8 *buf)
{
return sd_write_blocks(start, size, buf);
}
#endif
/******************************************************************************/
int sdcard_identify(void)
{
int retv, hcs;
char tmp[8];
os_dly_wait(10);
sd_cmd(CMD_00, 0);
os_dly_wait(10);
sd_cmd(CMD_00, 0);
os_dly_wait(10);
retv = sd_cmd(CMD_08, 0x000001aa);
printk("CMD_08: retv=%08x resp0=%08x\n", retv, cmd_resp[0]);
if(retv)
hcs = 0;
else
hcs = 1<<30;
while(1){
retv = sd_acmd(CMD_41, 0x80100000|hcs);
if(retv)
break;
if(cmd_resp[0]&0x80000000)
break;
}
if(retv){
printk("ACMD41 error! %08x\n", retv);
return -1;
}
is_sdhc = 0;
if(cmd_resp[0]&0x40000000)
is_sdhc = 1;
printk(" V2.0: %s\n", (hcs?"Yes":"No"));
printk(" SDHC: %s\n", (is_sdhc?"Yes":"No"));
// Send CID
retv = sd_cmd(CMD_02, 0x00000000);
if(retv)
return retv;
memcpy(sd_cid, (u8*)cmd_resp, 16);
tmp[0] = sd_cid[12];
tmp[1] = sd_cid[11];
tmp[2] = sd_cid[10];
tmp[3] = sd_cid[9];
tmp[4] = sd_cid[8];
tmp[5] = 0;
printk(" Name: %s\n", tmp);
// Send RCA
retv = sd_cmd(CMD_03, 0x00000000);
if(retv)
return retv;
sd_rca = cmd_resp[0]>>16;
// Send CSD
retv = sd_cmd(CMD_09, (sd_rca<<16));
if(retv){
sd_rca =0;
return retv;
}
memcpy(sd_csd, (u8*)cmd_resp, 16);
// Get Size form CSD
bsize = 1<<(sd_csd[10]&0x0f);
printk(" Blen: %d\n", bsize);
if(is_sdhc){
csize = (sd_csd[8]<<16) | (sd_csd[7]<<8) | sd_csd[6];
csize &= 0x003fffff;
csize = (csize+1)*512;
if(bsize==512){
cblock = csize*2;
}else if(bsize==1024){
cblock = csize;
}else{
cblock = csize/2;
}
}else{
int m;
m = (sd_csd[6]<<8) | sd_csd[5];
m = (m>>7)&7;
m = 1<<(m+2);
csize = (sd_csd[9]<<16) | (sd_csd[8]<<8) | sd_csd[7];
csize = (csize>>6)&0x00000fff;
csize = (csize+1)*m;
cblock = csize;
if(bsize==512) csize /= 2;
if(bsize==2048) csize *= 2;
}
printk(" Blks: %d\n", cblock);
printk(" Size: %d K\n", csize);
// Select CARD
retv = sd_cmd(CMD_07, sd_rca<<16);
if(retv){
sd_rca = 0;
return retv;
}
//printk("CMD_07: resp=%08x\n", cmd_resp[0]);
sd_clk_set(SDCLK_HIGH);
// Set Block Len
sd_cmd(CMD_16, 512);
//printk("CMD_16: resp=%08x\n", cmd_resp[0]);
#if 1
// Switch to 4bit
retv = sd_acmd(CMD_06, 2);
if(retv)
return retv;
//printk("ACMD06: resp=%08x\n", cmd_resp[0]);
sd_bus_width(4);
#endif
retv = sd_acmd(CMD_13, 0);
if(retv)
return retv;
os_dly_wait(1);
//printk("ACMD13: resp=%08x\n", cmd_resp[0]);
return 0;
}
/******************************************************************************/
int sdio_init(void)
{
SDIO->MASK = 0x00000000;
SDIO->ICR = 0x00c007ff;
SDIO->DCTRL= 0;
SDIO->CMD = 0;
SDIO->CLKCR = 0x0000;
SDIO->CLKCR = 0x2000;
sd_rca = 0;
os_sem_init(&cmd_sem, 0);
NVIC_SetPriority(SDIO_IRQn, 6);
NVIC_EnableIRQ(SDIO_IRQn);
sd_clk_set(SDCLK_LOW);
sd_bus_width(1);
sd_power_on(1);
sd_clk_enable(1);
if(sd_card_insert()){
printk("SDCARD insert!\n");
sdcard_identify();
}
return 0;
}
/******************************************************************************/
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