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linux/drivers/mmc/core/sd_ops.c
Thomas Gleixner 2874c5fd28 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:32 -07:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* linux/drivers/mmc/core/sd_ops.h
*
* Copyright 2006-2007 Pierre Ossman
*/
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/export.h>
#include <linux/scatterlist.h>
#include <linux/mmc/host.h>
#include <linux/mmc/card.h>
#include <linux/mmc/mmc.h>
#include <linux/mmc/sd.h>
#include "core.h"
#include "sd_ops.h"
int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card)
{
int err;
struct mmc_command cmd = {};
if (WARN_ON(card && card->host != host))
return -EINVAL;
cmd.opcode = MMC_APP_CMD;
if (card) {
cmd.arg = card->rca << 16;
cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
} else {
cmd.arg = 0;
cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_BCR;
}
err = mmc_wait_for_cmd(host, &cmd, 0);
if (err)
return err;
/* Check that card supported application commands */
if (!mmc_host_is_spi(host) && !(cmd.resp[0] & R1_APP_CMD))
return -EOPNOTSUPP;
return 0;
}
EXPORT_SYMBOL_GPL(mmc_app_cmd);
static int mmc_wait_for_app_cmd(struct mmc_host *host, struct mmc_card *card,
struct mmc_command *cmd)
{
struct mmc_request mrq = {};
int i, err = -EIO;
/*
* We have to resend MMC_APP_CMD for each attempt so
* we cannot use the retries field in mmc_command.
*/
for (i = 0; i <= MMC_CMD_RETRIES; i++) {
err = mmc_app_cmd(host, card);
if (err) {
/* no point in retrying; no APP commands allowed */
if (mmc_host_is_spi(host)) {
if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
break;
}
continue;
}
memset(&mrq, 0, sizeof(struct mmc_request));
memset(cmd->resp, 0, sizeof(cmd->resp));
cmd->retries = 0;
mrq.cmd = cmd;
cmd->data = NULL;
mmc_wait_for_req(host, &mrq);
err = cmd->error;
if (!cmd->error)
break;
/* no point in retrying illegal APP commands */
if (mmc_host_is_spi(host)) {
if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
break;
}
}
return err;
}
int mmc_app_set_bus_width(struct mmc_card *card, int width)
{
struct mmc_command cmd = {};
cmd.opcode = SD_APP_SET_BUS_WIDTH;
cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
switch (width) {
case MMC_BUS_WIDTH_1:
cmd.arg = SD_BUS_WIDTH_1;
break;
case MMC_BUS_WIDTH_4:
cmd.arg = SD_BUS_WIDTH_4;
break;
default:
return -EINVAL;
}
return mmc_wait_for_app_cmd(card->host, card, &cmd);
}
int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
{
struct mmc_command cmd = {};
int i, err = 0;
cmd.opcode = SD_APP_OP_COND;
if (mmc_host_is_spi(host))
cmd.arg = ocr & (1 << 30); /* SPI only defines one bit */
else
cmd.arg = ocr;
cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR;
for (i = 100; i; i--) {
err = mmc_wait_for_app_cmd(host, NULL, &cmd);
if (err)
break;
/* if we're just probing, do a single pass */
if (ocr == 0)
break;
/* otherwise wait until reset completes */
if (mmc_host_is_spi(host)) {
if (!(cmd.resp[0] & R1_SPI_IDLE))
break;
} else {
if (cmd.resp[0] & MMC_CARD_BUSY)
break;
}
err = -ETIMEDOUT;
mmc_delay(10);
}
if (!i)
pr_err("%s: card never left busy state\n", mmc_hostname(host));
if (rocr && !mmc_host_is_spi(host))
*rocr = cmd.resp[0];
return err;
}
int mmc_send_if_cond(struct mmc_host *host, u32 ocr)
{
struct mmc_command cmd = {};
int err;
static const u8 test_pattern = 0xAA;
u8 result_pattern;
/*
* To support SD 2.0 cards, we must always invoke SD_SEND_IF_COND
* before SD_APP_OP_COND. This command will harmlessly fail for
* SD 1.0 cards.
*/
cmd.opcode = SD_SEND_IF_COND;
cmd.arg = ((ocr & 0xFF8000) != 0) << 8 | test_pattern;
cmd.flags = MMC_RSP_SPI_R7 | MMC_RSP_R7 | MMC_CMD_BCR;
err = mmc_wait_for_cmd(host, &cmd, 0);
if (err)
return err;
if (mmc_host_is_spi(host))
result_pattern = cmd.resp[1] & 0xFF;
else
result_pattern = cmd.resp[0] & 0xFF;
if (result_pattern != test_pattern)
return -EIO;
return 0;
}
int mmc_send_relative_addr(struct mmc_host *host, unsigned int *rca)
{
int err;
struct mmc_command cmd = {};
cmd.opcode = SD_SEND_RELATIVE_ADDR;
cmd.arg = 0;
cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR;
err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
if (err)
return err;
*rca = cmd.resp[0] >> 16;
return 0;
}
int mmc_app_send_scr(struct mmc_card *card)
{
int err;
struct mmc_request mrq = {};
struct mmc_command cmd = {};
struct mmc_data data = {};
struct scatterlist sg;
__be32 *scr;
/* NOTE: caller guarantees scr is heap-allocated */
err = mmc_app_cmd(card->host, card);
if (err)
return err;
/* dma onto stack is unsafe/nonportable, but callers to this
* routine normally provide temporary on-stack buffers ...
*/
scr = kmalloc(sizeof(card->raw_scr), GFP_KERNEL);
if (!scr)
return -ENOMEM;
mrq.cmd = &cmd;
mrq.data = &data;
cmd.opcode = SD_APP_SEND_SCR;
cmd.arg = 0;
cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
data.blksz = 8;
data.blocks = 1;
data.flags = MMC_DATA_READ;
data.sg = &sg;
data.sg_len = 1;
sg_init_one(&sg, scr, 8);
mmc_set_data_timeout(&data, card);
mmc_wait_for_req(card->host, &mrq);
card->raw_scr[0] = be32_to_cpu(scr[0]);
card->raw_scr[1] = be32_to_cpu(scr[1]);
kfree(scr);
if (cmd.error)
return cmd.error;
if (data.error)
return data.error;
return 0;
}
int mmc_sd_switch(struct mmc_card *card, int mode, int group,
u8 value, u8 *resp)
{
struct mmc_request mrq = {};
struct mmc_command cmd = {};
struct mmc_data data = {};
struct scatterlist sg;
/* NOTE: caller guarantees resp is heap-allocated */
mode = !!mode;
value &= 0xF;
mrq.cmd = &cmd;
mrq.data = &data;
cmd.opcode = SD_SWITCH;
cmd.arg = mode << 31 | 0x00FFFFFF;
cmd.arg &= ~(0xF << (group * 4));
cmd.arg |= value << (group * 4);
cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
data.blksz = 64;
data.blocks = 1;
data.flags = MMC_DATA_READ;
data.sg = &sg;
data.sg_len = 1;
sg_init_one(&sg, resp, 64);
mmc_set_data_timeout(&data, card);
mmc_wait_for_req(card->host, &mrq);
if (cmd.error)
return cmd.error;
if (data.error)
return data.error;
return 0;
}
int mmc_app_sd_status(struct mmc_card *card, void *ssr)
{
int err;
struct mmc_request mrq = {};
struct mmc_command cmd = {};
struct mmc_data data = {};
struct scatterlist sg;
/* NOTE: caller guarantees ssr is heap-allocated */
err = mmc_app_cmd(card->host, card);
if (err)
return err;
mrq.cmd = &cmd;
mrq.data = &data;
cmd.opcode = SD_APP_SD_STATUS;
cmd.arg = 0;
cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_ADTC;
data.blksz = 64;
data.blocks = 1;
data.flags = MMC_DATA_READ;
data.sg = &sg;
data.sg_len = 1;
sg_init_one(&sg, ssr, 64);
mmc_set_data_timeout(&data, card);
mmc_wait_for_req(card->host, &mrq);
if (cmd.error)
return cmd.error;
if (data.error)
return data.error;
return 0;
}
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