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diosmios/sdmmc.c
0xD15EA5E@gmail.com 82602a7ff0 dml 
git-svn-id: svn://localhost/Users/andi/Downloads/code/DML@30 be6c1b03-d731-4111-a574-e37d80d43941
2012-09-25 11:48:20 +00:00

374 lines
8.3 KiB
C
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/*
mini - a Free Software replacement for the Nintendo/BroadOn IOS.
SD/MMC interface
Copyright (C) 2008, 2009 Sven Peter <svenpeter@gmail.com>
# This code is licensed to you under the terms of the GNU GPL, version 2;
# see file COPYING or http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
*/
#include "bsdtypes.h"
#include "sdhc.h"
#include "string.h"
#include "utils.h"
//#define SDMMC_DEBUG
#ifdef SDMMC_DEBUG
static int sdmmcdebug = 0;
#define DPRINTF(n,s) do { if ((n) <= sdmmcdebug) dbgprintf s; } while (0)
#else
#define DPRINTF(n,s) do {} while(0)
#endif
struct sdmmc_card {
sdmmc_chipset_handle_t handle;
int inserted;
int sdhc_blockmode;
int selected;
int new_card; // set to 1 everytime a new card is inserted
u32 timeout;
u32 num_sectors;
u32 cid;
u16 rca;
};
#ifdef LOADER
static struct sdmmc_card card;
#else
static struct sdmmc_card card;
#endif
void sdmmc_attach(sdmmc_chipset_handle_t handle)
{
memset8(&card, 0, sizeof(card));
card.handle = handle;
//DPRINTF(0, ("sdmmc: attached new SD/MMC card\n"));
sdhc_host_reset(card.handle);
if (sdhc_card_detect(card.handle)) {
//DPRINTF(1, ("card is inserted. starting init sequence.\n"));
sdmmc_needs_discover();
}
}
void sdmmc_abort(void) {
struct sdmmc_command cmd;
//dbgprintf("abortion kthx\n");
memset8(&cmd, 0, sizeof(cmd));
cmd.c_opcode = MMC_STOP_TRANSMISSION;
cmd.c_arg = 0;
cmd.c_flags = SCF_RSP_R1B;
sdhc_exec_command(card.handle, &cmd);
}
void sdmmc_needs_discover(void)
{
struct sdmmc_command cmd;
u32 ocr;
//DPRINTF(0, ("sdmmc: card needs discovery.\n"));
sdhc_host_reset(card.handle);
card.new_card = 1;
if (!sdhc_card_detect(card.handle)) {
//DPRINTF(1, ("sdmmc: card (no longer?) inserted.\n"));
card.inserted = 0;
return;
}
if (sdhc_bus_power(card.handle, 1) != 0) {
//dbgprintf("sdmmc: powerup failed for card\n");
goto out;
}
if (sdhc_bus_clock(card.handle, SDMMC_DEFAULT_CLOCK) != 0) {
//dbgprintf("sdmmc: could not enable clock for card\n");
goto out_power;
}
memset8(&cmd, 0, sizeof(cmd));
cmd.c_opcode = MMC_GO_IDLE_STATE;
cmd.c_flags = SCF_RSP_R0;
sdhc_exec_command(card.handle, &cmd);
if (cmd.c_error) {
//dbgprintf("sdmmc: GO_IDLE_STATE failed with %d\n", cmd.c_error);
goto out_clock;
}
memset8(&cmd, 0, sizeof(cmd));
cmd.c_opcode = SD_SEND_IF_COND;
cmd.c_arg = 0x1aa;
cmd.c_flags = SCF_RSP_R7;
cmd.c_timeout = 100;
sdhc_exec_command(card.handle, &cmd);
ocr = card.handle->ocr;
if (cmd.c_error || (cmd.c_resp[0] & 0xff) != 0xaa)
ocr &= ~SD_OCR_SDHC_CAP;
else
ocr |= SD_OCR_SDHC_CAP;
int tries;
for (tries = 100; tries > 0; tries--) {
udelay(100000);
memset8(&cmd, 0, sizeof(cmd));
cmd.c_opcode = MMC_APP_CMD;
cmd.c_arg = 0;
cmd.c_flags = SCF_RSP_R1;
sdhc_exec_command(card.handle, &cmd);
if (cmd.c_error)
continue;
memset8(&cmd, 0, sizeof(cmd));
cmd.c_opcode = SD_APP_OP_COND;
cmd.c_arg = ocr;
cmd.c_flags = SCF_RSP_R3;
sdhc_exec_command(card.handle, &cmd);
if (cmd.c_error)
continue;
if (ISSET(MMC_R1(cmd.c_resp), MMC_OCR_MEM_READY))
break;
}
if (!ISSET(cmd.c_resp[0], MMC_OCR_MEM_READY)) {
//dbgprintf("sdmmc: card failed to powerup.\n");
goto out_power;
}
if (ISSET(MMC_R1(cmd.c_resp), SD_OCR_SDHC_CAP))
card.sdhc_blockmode = 1;
else
card.sdhc_blockmode = 0;
u8 *resp;
memset8(&cmd, 0, sizeof(cmd));
cmd.c_opcode = MMC_ALL_SEND_CID;
cmd.c_arg = 0;
cmd.c_flags = SCF_RSP_R2;
sdhc_exec_command(card.handle, &cmd);
if (cmd.c_error) {
goto out_clock;
}
card.cid = MMC_R1(cmd.c_resp);
resp = (u8 *)cmd.c_resp;
memset8(&cmd, 0, sizeof(cmd));
cmd.c_opcode = SD_SEND_RELATIVE_ADDR;
cmd.c_arg = 0;
cmd.c_flags = SCF_RSP_R6;
sdhc_exec_command(card.handle, &cmd);
if (cmd.c_error) {
//dbgprintf("sdmmc: SD_SEND_RCA failed with %d\n", cmd.c_error);
goto out_clock;
}
card.rca = MMC_R1(cmd.c_resp)>>16;
card.selected = 0;
card.inserted = 1;
memset8(&cmd, 0, sizeof(cmd));
cmd.c_opcode = MMC_SEND_CSD;
cmd.c_arg = ((u32)card.rca)<<16;
cmd.c_flags = SCF_RSP_R2;
sdhc_exec_command(card.handle, &cmd);
if (cmd.c_error) {
//dbgprintf("sdmmc: MMC_SEND_CSD failed with %d\n", cmd.c_error);
goto out_power;
}
resp = (u8 *)cmd.c_resp;
if (resp[13] == 0xe) { // sdhc
unsigned int c_size = resp[7] << 16 | resp[6] << 8 | resp[5];
//dbgprintf("sdmmc: sdhc mode, c_size=%u, card size = %uk\n", c_size, (c_size + 1)* 512);
card.timeout = 250 * 1000000; // spec says read timeout is 100ms and write/erase timeout is 250ms
card.num_sectors = (c_size + 1) * 1024; // number of 512-byte sectors
}
else {
unsigned int taac, nsac, read_bl_len, c_size, c_size_mult;
taac = resp[13];
nsac = resp[12];
read_bl_len = resp[9] & 0xF;
c_size = (resp[8] & 3) << 10;
c_size |= (resp[7] << 2);
c_size |= (resp[6] >> 6);
c_size_mult = (resp[5] & 3) << 1;
c_size_mult |= resp[4] >> 7;
//dbgprintf("taac=%u nsac=%u read_bl_len=%u c_size=%u c_size_mult=%u card size=%u bytes\n",
// taac, nsac, read_bl_len, c_size, c_size_mult, (c_size + 1) * (4 << c_size_mult) * (1 << read_bl_len));
static const unsigned int time_unit[] = {1, 10, 100, 1000, 10000, 100000, 1000000, 10000000};
static const unsigned int time_value[] = {1, 10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80}; // must div by 10
card.timeout = time_unit[taac & 7] * time_value[(taac >> 3) & 0xf] / 10;
//dbgprintf("calculated timeout = %uns\n", card.timeout);
card.num_sectors = (c_size + 1) * (4 << c_size_mult) * (1 << read_bl_len) / 512;
}
sdmmc_select();
memset8(&cmd, 0, sizeof(cmd));
cmd.c_opcode = MMC_SET_BLOCKLEN;
cmd.c_arg = SDMMC_DEFAULT_BLOCKLEN;
cmd.c_flags = SCF_RSP_R1;
sdhc_exec_command(card.handle, &cmd);
if (cmd.c_error) {
//dbgprintf("sdmmc: MMC_SET_BLOCKLEN failed with %d\n", cmd.c_error);
card.inserted = card.selected = 0;
goto out_clock;
}
return;
out_clock:
sdhc_bus_clock(card.handle, SDMMC_SDCLK_OFF);
out_power:
sdhc_bus_power(card.handle, 0);
out:
return;
}
int sdmmc_select(void)
{
struct sdmmc_command cmd;
memset8(&cmd, 0, sizeof(cmd));
cmd.c_opcode = MMC_SELECT_CARD;
cmd.c_arg = ((u32)card.rca)<<16;
cmd.c_flags = SCF_RSP_R1B;
sdhc_exec_command(card.handle, &cmd);
if (cmd.c_error)
{
return -1;
}
card.selected = 1;
return 0;
}
int sdmmc_check_card(void)
{
if (card.inserted == 0)
return SDMMC_NO_CARD;
if (card.new_card == 1)
return SDMMC_NEW_CARD;
return SDMMC_INSERTED;
}
int sdmmc_ack_card(void)
{
if (card.new_card == 1) {
card.new_card = 0;
return 0;
}
return -1;
}
int sdmmc_read(u32 blk_start, u32 blk_count, void *data)
{
struct sdmmc_command cmd;
if (card.inserted == 0)
{
return -1;
}
if (card.selected == 0) {
if (sdmmc_select() < 0) {
return -1;
}
}
if (card.new_card == 1) {
return -1;
}
memset8(&cmd, 0, sizeof(cmd));
cmd.c_opcode = MMC_READ_BLOCK_MULTIPLE;
if (card.sdhc_blockmode)
cmd.c_arg = blk_start;
else
cmd.c_arg = blk_start * SDMMC_DEFAULT_BLOCKLEN;
cmd.c_data = data;
cmd.c_datalen = blk_count * SDMMC_DEFAULT_BLOCKLEN;
cmd.c_blklen = SDMMC_DEFAULT_BLOCKLEN;
cmd.c_flags = SCF_RSP_R1 | SCF_CMD_READ;
sdhc_exec_command(card.handle, &cmd);
if (cmd.c_error)
{
return -1;
}
return 0;
}
int sdmmc_write(u32 blk_start, u32 blk_count, void *data)
{
struct sdmmc_command cmd;
if (card.inserted == 0) {
return -1;
}
if (card.selected == 0) {
if (sdmmc_select() < 0) {
return -1;
}
}
if (card.new_card == 1) {
return -1;
}
memset8(&cmd, 0, sizeof(cmd));
cmd.c_opcode = MMC_WRITE_BLOCK_MULTIPLE;
if (card.sdhc_blockmode)
cmd.c_arg = blk_start;
else
cmd.c_arg = blk_start * SDMMC_DEFAULT_BLOCKLEN;
cmd.c_data = data;
cmd.c_datalen = blk_count * SDMMC_DEFAULT_BLOCKLEN;
cmd.c_blklen = SDMMC_DEFAULT_BLOCKLEN;
cmd.c_flags = SCF_RSP_R1;
sdhc_exec_command(card.handle, &cmd);
if (cmd.c_error)
{
return -1;
}
return 0;
}
int sdmmc_get_sectors(void)
{
if (card.inserted == 0) {
return -1;
}
if (card.new_card == 1) {
return -1;
}
// sdhc_error(sdhci->reg_base, "num sectors = %u", sdhci->num_sectors);
return card.num_sectors;
}
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