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/*
* This file is part of the coreboot project.
*
* 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; either version 2 of
* the License, or (at your option) any later version.
*
* 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.
*
* Secure Digital (SD) Host Controller interface DMA support code
*/
#include <commonlib/sdhci.h>
#include <commonlib/storage.h>
#include <console/console.h>
#include <delay.h>
#include <endian.h>
#include <string.h>
#include "sdhci.h"
#include "sd_mmc.h"
#include "storage.h"
static void sdhci_alloc_adma_descs(struct sdhci_ctrlr *sdhci_ctrlr,
u32 need_descriptors)
{
if (sdhci_ctrlr->adma_descs) {
if (sdhci_ctrlr->adma_desc_count < need_descriptors) {
/* Previously allocated array is too small */
free(sdhci_ctrlr->adma_descs);
sdhci_ctrlr->adma_desc_count = 0;
sdhci_ctrlr->adma_descs = NULL;
}
}
/* use dma_malloc() to make sure we get the coherent/uncached memory */
if (!sdhci_ctrlr->adma_descs) {
sdhci_ctrlr->adma_descs = malloc(need_descriptors
* sizeof(*sdhci_ctrlr->adma_descs));
if (sdhci_ctrlr->adma_descs == NULL)
die("fail to malloc adma_descs\n");
sdhci_ctrlr->adma_desc_count = need_descriptors;
}
memset(sdhci_ctrlr->adma_descs, 0, sizeof(*sdhci_ctrlr->adma_descs)
* need_descriptors);
}
static void sdhci_alloc_adma64_descs(struct sdhci_ctrlr *sdhci_ctrlr,
u32 need_descriptors)
{
if (sdhci_ctrlr->adma64_descs) {
if (sdhci_ctrlr->adma_desc_count < need_descriptors) {
/* Previously allocated array is too small */
free(sdhci_ctrlr->adma64_descs);
sdhci_ctrlr->adma_desc_count = 0;
sdhci_ctrlr->adma64_descs = NULL;
}
}
/* use dma_malloc() to make sure we get the coherent/uncached memory */
if (!sdhci_ctrlr->adma64_descs) {
sdhci_ctrlr->adma64_descs = malloc(need_descriptors
* sizeof(*sdhci_ctrlr->adma64_descs));
if (sdhci_ctrlr->adma64_descs == NULL)
die("fail to malloc adma64_descs\n");
sdhci_ctrlr->adma_desc_count = need_descriptors;
}
memset(sdhci_ctrlr->adma64_descs, 0, sizeof(*sdhci_ctrlr->adma64_descs)
* need_descriptors);
}
int sdhci_setup_adma(struct sdhci_ctrlr *sdhci_ctrlr, struct mmc_data *data)
{
int i, togo, need_descriptors;
int dma64;
char *buffer_data;
u16 attributes;
togo = data->blocks * data->blocksize;
if (!togo) {
sdhc_error("%s: MmcData corrupted: %d blocks of %d bytes\n",
__func__, data->blocks, data->blocksize);
return -1;
}
need_descriptors = 1 + togo / SDHCI_MAX_PER_DESCRIPTOR;
dma64 = sdhci_ctrlr->sd_mmc_ctrlr.caps & DRVR_CAP_DMA_64BIT;
if (dma64)
sdhci_alloc_adma64_descs(sdhci_ctrlr, need_descriptors);
else
sdhci_alloc_adma_descs(sdhci_ctrlr, need_descriptors);
buffer_data = data->dest;
/* Now set up the descriptor chain. */
for (i = 0; togo; i++) {
unsigned int desc_length;
if (togo < SDHCI_MAX_PER_DESCRIPTOR)
desc_length = togo;
else
desc_length = SDHCI_MAX_PER_DESCRIPTOR;
togo -= desc_length;
attributes = SDHCI_ADMA_VALID | SDHCI_ACT_TRAN;
if (togo == 0)
attributes |= SDHCI_ADMA_END;
if (dma64) {
sdhci_ctrlr->adma64_descs[i].addr =
(uintptr_t)buffer_data;
sdhci_ctrlr->adma64_descs[i].addr_hi = 0;
sdhci_ctrlr->adma64_descs[i].length = desc_length;
sdhci_ctrlr->adma64_descs[i].attributes = attributes;
} else {
sdhci_ctrlr->adma_descs[i].addr =
(uintptr_t)buffer_data;
sdhci_ctrlr->adma_descs[i].length = desc_length;
sdhci_ctrlr->adma_descs[i].attributes = attributes;
}
buffer_data += desc_length;
}
if (dma64)
sdhci_writel(sdhci_ctrlr, (uintptr_t) sdhci_ctrlr->adma64_descs,
SDHCI_ADMA_ADDRESS);
else
sdhci_writel(sdhci_ctrlr, (uintptr_t) sdhci_ctrlr->adma_descs,
SDHCI_ADMA_ADDRESS);
return 0;
}
int sdhci_complete_adma(struct sdhci_ctrlr *sdhci_ctrlr,
struct mmc_command *cmd)
{
int retry;
u32 stat = 0, mask;
mask = SDHCI_INT_RESPONSE | SDHCI_INT_ERROR;
retry = 10000; /* Command should be done in way less than 10 ms. */
while (--retry) {
stat = sdhci_readl(sdhci_ctrlr, SDHCI_INT_STATUS);
if (stat & mask)
break;
udelay(1);
}
sdhci_writel(sdhci_ctrlr, SDHCI_INT_RESPONSE, SDHCI_INT_STATUS);
if (retry && !(stat & SDHCI_INT_ERROR)) {
/* Command OK, let's wait for data transfer completion. */
mask = SDHCI_INT_DATA_END |
SDHCI_INT_ERROR | SDHCI_INT_ADMA_ERROR;
/* Transfer should take 10 seconds tops. */
retry = 10 * 1000 * 1000;
while (--retry) {
stat = sdhci_readl(sdhci_ctrlr, SDHCI_INT_STATUS);
if (stat & mask)
break;
udelay(1);
}
sdhci_writel(sdhci_ctrlr, stat, SDHCI_INT_STATUS);
if (retry && !(stat & SDHCI_INT_ERROR)) {
sdhci_cmd_done(sdhci_ctrlr, cmd);
return 0;
}
}
sdhc_error("%s: transfer error, stat %#x, adma error %#x, retry %d\n",
__func__, stat, sdhci_readl(sdhci_ctrlr, SDHCI_ADMA_ERROR),
retry);
sdhci_reset(sdhci_ctrlr, SDHCI_RESET_CMD);
sdhci_reset(sdhci_ctrlr, SDHCI_RESET_DATA);
if (stat & SDHCI_INT_TIMEOUT)
return CARD_TIMEOUT;
return CARD_COMM_ERR;
}
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