061fed753e
When we send MMC commads that contain data the controller provides no description of the order of events and we need to be able to send data from and to the controller "when needed". Changed the code to react on buffer read and buffer write ready based on interrupts. Change-Id: I60c9140bf0e45b74be6475054564d4e1bd89f21e
171 lines
3.6 KiB
C
171 lines
3.6 KiB
C
/* kernel headers */
|
|
#include <minix/blockdriver.h>
|
|
#include <minix/minlib.h>
|
|
#include <minix/log.h>
|
|
|
|
/* usr headers */
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <stdarg.h>
|
|
#include <assert.h>
|
|
#include <unistd.h>
|
|
|
|
/* local headers */
|
|
#include "mmchost.h"
|
|
#include "sdmmcreg.h"
|
|
|
|
/*
|
|
* Define a structure to be used for logging
|
|
*/
|
|
static struct log log = {
|
|
.name = "mmc_host_memory",
|
|
.log_level = LEVEL_INFO,
|
|
.log_func = default_log
|
|
};
|
|
|
|
/* This is currently a dummy driver using an in-memory structure */
|
|
#define DUMMY_SIZE_IN_BLOCKS 0xFFFFFu
|
|
#define DUMMY_BLOCK_SIZE 512
|
|
static char *dummy_data = NULL;
|
|
|
|
static struct sd_card *
|
|
init_dummy_sdcard(struct sd_slot *slot)
|
|
{
|
|
int i;
|
|
struct sd_card *card;
|
|
|
|
assert(slot != NULL);
|
|
|
|
log_info(&log, "Using a dummy card \n");
|
|
if (dummy_data == NULL) {
|
|
dummy_data = malloc(DUMMY_BLOCK_SIZE * DUMMY_SIZE_IN_BLOCKS);
|
|
if (dummy_data == NULL) {
|
|
panic
|
|
("Failed to allocate data for dummy mmc driver\n");
|
|
}
|
|
}
|
|
|
|
card = &slot->card;
|
|
memset(card, 0, sizeof(struct sd_card));
|
|
card->slot = slot;
|
|
|
|
for (i = 0; i < MINOR_PER_DISK + PARTITONS_PER_DISK; i++) {
|
|
card->part[i].dv_base = 0;
|
|
card->part[i].dv_size = 0;
|
|
}
|
|
|
|
for (i = 0; i < PARTITONS_PER_DISK * SUBPARTITION_PER_PARTITION; i++) {
|
|
card->subpart[i].dv_base = 0;
|
|
card->subpart[i].dv_size = 0;
|
|
}
|
|
|
|
card->part[0].dv_base = 0;
|
|
card->part[0].dv_size = DUMMY_BLOCK_SIZE * DUMMY_SIZE_IN_BLOCKS;
|
|
return card;
|
|
}
|
|
|
|
int
|
|
dummy_host_init(struct mmc_host *host)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
dummy_set_log_level(int level)
|
|
{
|
|
if (level >= 0 && level <= 4) {
|
|
log.log_level = level;
|
|
}
|
|
}
|
|
|
|
int
|
|
dummy_host_set_instance(struct mmc_host *host, int instance)
|
|
{
|
|
log_info(&log, "Using instance number %d\n", instance);
|
|
if (instance != 0) {
|
|
return EIO;
|
|
}
|
|
return OK;
|
|
}
|
|
|
|
int
|
|
dummy_host_reset(struct mmc_host *host)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
dummy_card_detect(struct sd_slot *slot)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
struct sd_card *
|
|
dummy_card_initialize(struct sd_slot *slot)
|
|
{
|
|
slot->card.blk_size = DUMMY_BLOCK_SIZE;
|
|
slot->card.blk_count = DUMMY_SIZE_IN_BLOCKS;
|
|
slot->card.state = SD_MODE_DATA_TRANSFER_MODE;
|
|
|
|
memset(slot->card.part, 0, sizeof(slot->card.part));
|
|
memset(slot->card.subpart, 0, sizeof(slot->card.subpart));
|
|
slot->card.part[0].dv_base = 0;
|
|
slot->card.part[0].dv_size = DUMMY_BLOCK_SIZE * DUMMY_SIZE_IN_BLOCKS;
|
|
return &slot->card;
|
|
}
|
|
|
|
int
|
|
dummy_card_release(struct sd_card *card)
|
|
{
|
|
assert(card->open_ct == 1);
|
|
card->open_ct--;
|
|
card->state = SD_MODE_UNINITIALIZED;
|
|
/* TODO:Set card state */
|
|
return OK;
|
|
}
|
|
|
|
/* read count blocks into existing buf */
|
|
int
|
|
dummy_host_read(struct sd_card *card,
|
|
uint32_t blknr, uint32_t count, unsigned char *buf)
|
|
{
|
|
memcpy(buf, &dummy_data[blknr * DUMMY_BLOCK_SIZE],
|
|
count * DUMMY_BLOCK_SIZE);
|
|
return OK;
|
|
}
|
|
|
|
/* write count blocks */
|
|
int
|
|
dummy_host_write(struct sd_card *card,
|
|
uint32_t blknr, uint32_t count, unsigned char *buf)
|
|
{
|
|
memcpy(&dummy_data[blknr * DUMMY_BLOCK_SIZE], buf,
|
|
count * DUMMY_BLOCK_SIZE);
|
|
return OK;
|
|
}
|
|
|
|
void
|
|
host_initialize_host_structure_dummy(struct mmc_host *host)
|
|
{
|
|
/* Initialize the basic data structures host slots and cards */
|
|
int i;
|
|
|
|
host->host_set_instance = dummy_host_set_instance;
|
|
host->host_init = dummy_host_init;
|
|
host->set_log_level = dummy_set_log_level;
|
|
host->host_reset = dummy_host_reset;
|
|
host->card_detect = dummy_card_detect;
|
|
host->card_initialize = dummy_card_initialize;
|
|
host->card_release = dummy_card_release;
|
|
host->read = dummy_host_read;
|
|
host->write = dummy_host_write;
|
|
|
|
/* initialize data structures */
|
|
for (i = 0; i < sizeof(host->slot) / sizeof(host->slot[0]); i++) {
|
|
// @TODO set initial card and slot state
|
|
host->slot[i].host = host;
|
|
host->slot[i].card.slot = &host->slot[i];
|
|
}
|
|
init_dummy_sdcard(&host->slot[0]);
|
|
}
|