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path: root/drivers/mmc/host/mmc_spi.c
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Diffstat (limited to 'drivers/mmc/host/mmc_spi.c')
-rw-r--r--drivers/mmc/host/mmc_spi.c98
1 files changed, 37 insertions, 61 deletions
diff --git a/drivers/mmc/host/mmc_spi.c b/drivers/mmc/host/mmc_spi.c
index 1b1498805972..19544b121276 100644
--- a/drivers/mmc/host/mmc_spi.c
+++ b/drivers/mmc/host/mmc_spi.c
@@ -1,5 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
- * mmc_spi.c - Access SD/MMC cards through SPI master controllers
+ * Access SD/MMC cards through SPI master controllers
*
* (C) Copyright 2005, Intec Automation,
* Mike Lavender (mike@steroidmicros)
@@ -8,21 +9,6 @@
* Hans-Peter Nilsson (hp@axis.com)
* (C) Copyright 2007, ATRON electronic GmbH,
* Jan Nikitenko <jan.nikitenko@gmail.com>
- *
- *
- * 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/sched.h>
#include <linux/delay.h>
@@ -197,7 +183,7 @@ mmc_spi_readbytes(struct mmc_spi_host *host, unsigned len)
static int mmc_spi_skip(struct mmc_spi_host *host, unsigned long timeout,
unsigned n, u8 byte)
{
- u8 *cp = host->data->status;
+ u8 *cp = host->data->status;
unsigned long start = jiffies;
while (1) {
@@ -220,7 +206,7 @@ static int mmc_spi_skip(struct mmc_spi_host *host, unsigned long timeout,
* We use jiffies here because we want to have a relation
* between elapsed time and the blocking of the scheduler.
*/
- if (time_is_before_jiffies(start+1))
+ if (time_is_before_jiffies(start + 1))
schedule();
}
return -ETIMEDOUT;
@@ -415,7 +401,7 @@ checkstatus:
default:
dev_dbg(&host->spi->dev, "bad response type %04x\n",
- mmc_spi_resp_type(cmd));
+ mmc_spi_resp_type(cmd));
if (value >= 0)
value = -EINVAL;
goto done;
@@ -467,8 +453,8 @@ mmc_spi_command_send(struct mmc_spi_host *host,
memset(cp, 0xff, sizeof(data->status));
cp[1] = 0x40 | cmd->opcode;
- put_unaligned_be32(cmd->arg, cp+2);
- cp[6] = crc7_be(0, cp+1, 5) | 0x01;
+ put_unaligned_be32(cmd->arg, cp + 2);
+ cp[6] = crc7_be(0, cp + 1, 5) | 0x01;
cp += 7;
/* Then, read up to 13 bytes (while writing all-ones):
@@ -642,9 +628,7 @@ mmc_spi_setup_data_message(
if (multiple || direction == DMA_TO_DEVICE) {
t = &host->early_status;
memset(t, 0, sizeof(*t));
- t->len = (direction == DMA_TO_DEVICE)
- ? sizeof(scratch->status)
- : 1;
+ t->len = (direction == DMA_TO_DEVICE) ? sizeof(scratch->status) : 1;
t->tx_buf = host->ones;
t->tx_dma = host->ones_dma;
t->rx_buf = scratch->status;
@@ -677,8 +661,7 @@ mmc_spi_writeblock(struct mmc_spi_host *host, struct spi_transfer *t,
u32 pattern;
if (host->mmc->use_spi_crc)
- scratch->crc_val = cpu_to_be16(
- crc_itu_t(0, t->tx_buf, t->len));
+ scratch->crc_val = cpu_to_be16(crc_itu_t(0, t->tx_buf, t->len));
if (host->dma_dev)
dma_sync_single_for_device(host->dma_dev,
host->data_dma, sizeof(*scratch),
@@ -819,6 +802,10 @@ mmc_spi_readblock(struct mmc_spi_host *host, struct spi_transfer *t,
}
status = spi_sync_locked(spi, &host->m);
+ if (status < 0) {
+ dev_dbg(&spi->dev, "read error %d\n", status);
+ return status;
+ }
if (host->dma_dev) {
dma_sync_single_for_cpu(host->dma_dev,
@@ -855,9 +842,9 @@ mmc_spi_readblock(struct mmc_spi_host *host, struct spi_transfer *t,
be16_to_cpus(&scratch->crc_val);
if (scratch->crc_val != crc) {
- dev_dbg(&spi->dev, "read - crc error: crc_val=0x%04x, "
- "computed=0x%04x len=%d\n",
- scratch->crc_val, crc, t->len);
+ dev_dbg(&spi->dev,
+ "read - crc error: crc_val=0x%04x, computed=0x%04x len=%d\n",
+ scratch->crc_val, crc, t->len);
return -EILSEQ;
}
}
@@ -945,9 +932,7 @@ mmc_spi_data_do(struct mmc_spi_host *host, struct mmc_command *cmd,
dev_dbg(&host->spi->dev,
" mmc_spi: %s block, %d bytes\n",
- (direction == DMA_TO_DEVICE)
- ? "write"
- : "read",
+ (direction == DMA_TO_DEVICE) ? "write" : "read",
t->len);
if (direction == DMA_TO_DEVICE)
@@ -974,8 +959,7 @@ mmc_spi_data_do(struct mmc_spi_host *host, struct mmc_command *cmd,
if (status < 0) {
data->error = status;
dev_dbg(&spi->dev, "%s status %d\n",
- (direction == DMA_TO_DEVICE)
- ? "write" : "read",
+ (direction == DMA_TO_DEVICE) ? "write" : "read",
status);
break;
}
@@ -1249,8 +1233,7 @@ static void mmc_spi_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
mres = spi_setup(host->spi);
if (mres < 0)
dev_dbg(&host->spi->dev,
- "switch back to SPI mode 3"
- " failed\n");
+ "switch back to SPI mode 3 failed\n");
}
}
@@ -1470,7 +1453,7 @@ static int mmc_spi_probe(struct spi_device *spi)
return 0;
fail_add_host:
- mmc_remove_host (mmc);
+ mmc_remove_host(mmc);
fail_glue_init:
if (host->dma_dev)
dma_unmap_single(host->dma_dev, host->data_dma,
@@ -1485,7 +1468,6 @@ fail_ones_dma:
fail_nobuf1:
mmc_free_host(mmc);
mmc_spi_put_pdata(spi);
- dev_set_drvdata(&spi->dev, NULL);
nomem:
kfree(ones);
@@ -1496,32 +1478,27 @@ nomem:
static int mmc_spi_remove(struct spi_device *spi)
{
struct mmc_host *mmc = dev_get_drvdata(&spi->dev);
- struct mmc_spi_host *host;
-
- if (mmc) {
- host = mmc_priv(mmc);
+ struct mmc_spi_host *host = mmc_priv(mmc);
- /* prevent new mmc_detect_change() calls */
- if (host->pdata && host->pdata->exit)
- host->pdata->exit(&spi->dev, mmc);
+ /* prevent new mmc_detect_change() calls */
+ if (host->pdata && host->pdata->exit)
+ host->pdata->exit(&spi->dev, mmc);
- mmc_remove_host(mmc);
+ mmc_remove_host(mmc);
- if (host->dma_dev) {
- dma_unmap_single(host->dma_dev, host->ones_dma,
- MMC_SPI_BLOCKSIZE, DMA_TO_DEVICE);
- dma_unmap_single(host->dma_dev, host->data_dma,
- sizeof(*host->data), DMA_BIDIRECTIONAL);
- }
+ if (host->dma_dev) {
+ dma_unmap_single(host->dma_dev, host->ones_dma,
+ MMC_SPI_BLOCKSIZE, DMA_TO_DEVICE);
+ dma_unmap_single(host->dma_dev, host->data_dma,
+ sizeof(*host->data), DMA_BIDIRECTIONAL);
+ }
- kfree(host->data);
- kfree(host->ones);
+ kfree(host->data);
+ kfree(host->ones);
- spi->max_speed_hz = mmc->f_max;
- mmc_free_host(mmc);
- mmc_spi_put_pdata(spi);
- dev_set_drvdata(&spi->dev, NULL);
- }
+ spi->max_speed_hz = mmc->f_max;
+ mmc_free_host(mmc);
+ mmc_spi_put_pdata(spi);
return 0;
}
@@ -1542,8 +1519,7 @@ static struct spi_driver mmc_spi_driver = {
module_spi_driver(mmc_spi_driver);
-MODULE_AUTHOR("Mike Lavender, David Brownell, "
- "Hans-Peter Nilsson, Jan Nikitenko");
+MODULE_AUTHOR("Mike Lavender, David Brownell, Hans-Peter Nilsson, Jan Nikitenko");
MODULE_DESCRIPTION("SPI SD/MMC host driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("spi:mmc_spi");
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.