Some controller such as the ARM AMBA pl181 can not handle more than 16bits data length request. Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
1754 lines
42 KiB
C
1754 lines
42 KiB
C
/*
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* (C) Copyright 2010 Juergen Beisert, Pengutronix
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*
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* This code is havily inspired and in parts from the u-boot project:
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*
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* Copyright 2008, Freescale Semiconductor, Inc
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* Andy Fleming
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*
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* Based vaguely on the Linux code
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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/* #define DEBUG */
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#include <init.h>
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#include <common.h>
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#include <mci.h>
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#include <malloc.h>
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#include <errno.h>
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#include <asm-generic/div64.h>
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#include <asm/byteorder.h>
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#include <block.h>
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#include <disks.h>
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#include <linux/err.h>
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#define MAX_BUFFER_NUMBER 0xffffffff
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#define UNSTUFF_BITS(resp,start,size) \
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({ \
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const int __size = size; \
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const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
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const int __off = 3 - ((start) / 32); \
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const int __shft = (start) & 31; \
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u32 __res; \
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\
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__res = resp[__off] >> __shft; \
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if (__size + __shft > 32) \
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__res |= resp[__off-1] << ((32 - __shft) % 32); \
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__res & __mask; \
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})
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/**
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* @file
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* @brief Memory Card framework
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*
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* Checked with the following cards:
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* - Canon MMC 16 MiB
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* - Integral MicroSDHC, 8 GiB (Class 4)
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* - Kingston 512 MiB
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* - SanDisk 512 MiB
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* - Transcend SD Ultra, 1 GiB (Industrial)
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* - Transcend SDHC, 4 GiB (Class 6)
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* - Transcend SDHC, 8 GiB (Class 6)
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*/
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static inline unsigned mci_caps(struct mci *mci)
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{
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return mci->card_caps & mci->host->host_caps;
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}
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/**
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* Call the MMC/SD instance driver to run the command on the MMC/SD card
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* @param mci MCI instance
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* @param cmd The information about the command to run
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* @param data The data according to the command (can be NULL)
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* @return Driver's answer (0 on success)
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*/
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static int mci_send_cmd(struct mci *mci, struct mci_cmd *cmd, struct mci_data *data)
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{
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struct mci_host *host = mci->host;
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return host->send_cmd(mci->host, cmd, data);
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}
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/**
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* @param p Command definition to setup
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* @param cmd Valid SD/MMC command (refer MMC_CMD_* / SD_CMD_*)
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* @param arg Argument for the command (optional)
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* @param response Command's response type (refer MMC_RSP_*)
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*
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* Note: When calling, the 'response' must match command's requirements
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*/
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static void mci_setup_cmd(struct mci_cmd *p, unsigned cmd, unsigned arg, unsigned response)
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{
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p->cmdidx = cmd;
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p->cmdarg = arg;
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p->resp_type = response;
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}
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/**
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* Setup SD/MMC card's blocklength to be used for future transmitts
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* @param mci_dev MCI instance
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* @param len Blocklength in bytes
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* @return Transaction status (0 on success)
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*/
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static int mci_set_blocklen(struct mci *mci, unsigned len)
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{
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struct mci_cmd cmd;
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mci_setup_cmd(&cmd, MMC_CMD_SET_BLOCKLEN, len, MMC_RSP_R1);
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return mci_send_cmd(mci, &cmd, NULL);
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}
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static void *sector_buf;
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/**
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* Write one or several blocks of data to the card
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* @param mci_dev MCI instance
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* @param src Where to read from to write to the card
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* @param blocknum Block number to write
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* @param blocks Block count to write
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* @return Transaction status (0 on success)
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*/
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static int mci_block_write(struct mci *mci, const void *src, int blocknum,
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int blocks)
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{
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struct mci_cmd cmd;
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struct mci_data data;
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const void *buf;
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unsigned mmccmd;
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int ret;
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if (blocks > 1)
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mmccmd = MMC_CMD_WRITE_MULTIPLE_BLOCK;
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else
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mmccmd = MMC_CMD_WRITE_SINGLE_BLOCK;
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if ((unsigned long)src & 0x3) {
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memcpy(sector_buf, src, 512);
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buf = sector_buf;
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} else {
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buf = src;
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}
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mci_setup_cmd(&cmd,
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mmccmd,
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mci->high_capacity != 0 ? blocknum : blocknum * mci->write_bl_len,
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MMC_RSP_R1);
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data.src = buf;
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data.blocks = blocks;
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data.blocksize = mci->write_bl_len;
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data.flags = MMC_DATA_WRITE;
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ret = mci_send_cmd(mci, &cmd, &data);
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if (ret || blocks > 1) {
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mci_setup_cmd(&cmd, MMC_CMD_STOP_TRANSMISSION, 0, MMC_RSP_R1b);
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mci_send_cmd(mci, &cmd, NULL);
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}
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return ret;
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}
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/**
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* Read one or several block(s) of data from the card
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* @param mci MCI instance
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* @param dst Where to store the data read from the card
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* @param blocknum Block number to read
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* @param blocks number of blocks to read
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*/
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static int mci_read_block(struct mci *mci, void *dst, int blocknum,
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int blocks)
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{
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struct mci_cmd cmd;
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struct mci_data data;
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int ret;
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unsigned mmccmd;
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if (blocks > 1)
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mmccmd = MMC_CMD_READ_MULTIPLE_BLOCK;
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else
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mmccmd = MMC_CMD_READ_SINGLE_BLOCK;
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mci_setup_cmd(&cmd,
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mmccmd,
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mci->high_capacity != 0 ? blocknum : blocknum * mci->read_bl_len,
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MMC_RSP_R1);
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data.dest = dst;
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data.blocks = blocks;
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data.blocksize = mci->read_bl_len;
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data.flags = MMC_DATA_READ;
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ret = mci_send_cmd(mci, &cmd, &data);
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if (ret || blocks > 1) {
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mci_setup_cmd(&cmd, MMC_CMD_STOP_TRANSMISSION, 0, MMC_RSP_R1b);
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mci_send_cmd(mci, &cmd, NULL);
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}
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return ret;
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}
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/**
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* Reset the attached MMC/SD card
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* @param mci MCI instance
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* @return Transaction status (0 on success)
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*/
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static int mci_go_idle(struct mci *mci)
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{
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struct mci_cmd cmd;
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int err;
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udelay(1000);
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mci_setup_cmd(&cmd, MMC_CMD_GO_IDLE_STATE, 0, MMC_RSP_NONE);
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err = mci_send_cmd(mci, &cmd, NULL);
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if (err) {
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dev_dbg(&mci->dev, "Activating IDLE state failed: %d\n", err);
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return err;
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}
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udelay(2000); /* WTF? */
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return 0;
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}
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/**
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* FIXME
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* @param mci MCI instance
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* @return Transaction status (0 on success)
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*/
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static int sd_send_op_cond(struct mci *mci)
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{
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struct mci_host *host = mci->host;
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struct mci_cmd cmd;
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int timeout = 1000;
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int err;
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unsigned voltages;
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unsigned busy;
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unsigned arg;
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/*
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* Most cards do not answer if some reserved bits
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* in the ocr are set. However, Some controller
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* can set bit 7 (reserved for low voltages), but
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* how to manage low voltages SD card is not yet
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* specified.
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*/
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voltages = host->voltages & 0xff8000;
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do {
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mci_setup_cmd(&cmd, MMC_CMD_APP_CMD, 0, MMC_RSP_R1);
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err = mci_send_cmd(mci, &cmd, NULL);
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if (err) {
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dev_dbg(&mci->dev, "Preparing SD for operating conditions failed: %d\n", err);
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return err;
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}
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arg = mmc_host_is_spi(host) ? 0 : voltages;
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if (mci->version == SD_VERSION_2)
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arg |= OCR_HCS;
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mci_setup_cmd(&cmd, SD_CMD_APP_SEND_OP_COND, arg, MMC_RSP_R3);
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err = mci_send_cmd(mci, &cmd, NULL);
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if (err) {
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dev_dbg(&mci->dev, "SD operation condition set failed: %d\n", err);
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return err;
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}
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udelay(1000);
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if (mmc_host_is_spi(host))
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busy = cmd.response[0] & R1_SPI_IDLE;
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else
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busy = !(cmd.response[0] & OCR_BUSY);
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} while (busy && timeout--);
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if (timeout <= 0) {
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dev_dbg(&mci->dev, "SD operation condition set timed out\n");
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return -ENODEV;
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}
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if (mci->version != SD_VERSION_2)
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mci->version = SD_VERSION_1_0;
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if (mmc_host_is_spi(host)) { /* read OCR for spi */
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mci_setup_cmd(&cmd, MMC_CMD_SPI_READ_OCR, 0, MMC_RSP_R3);
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err = mci_send_cmd(mci, &cmd, NULL);
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if (err)
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return err;
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}
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mci->ocr = cmd.response[0];
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mci->high_capacity = ((mci->ocr & OCR_HCS) == OCR_HCS);
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mci->rca = 0;
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return 0;
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}
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/**
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* Setup the operation conditions to a MultiMediaCard
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* @param mci MCI instance
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* @return Transaction status (0 on success)
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*/
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static int mmc_send_op_cond(struct mci *mci)
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{
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struct mci_host *host = mci->host;
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struct mci_cmd cmd;
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int timeout = 1000;
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int err;
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/* Some cards seem to need this */
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mci_go_idle(mci);
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do {
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mci_setup_cmd(&cmd, MMC_CMD_SEND_OP_COND, OCR_HCS |
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host->voltages, MMC_RSP_R3);
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err = mci_send_cmd(mci, &cmd, NULL);
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if (err) {
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dev_dbg(&mci->dev, "Preparing MMC for operating conditions failed: %d\n", err);
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return err;
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}
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udelay(1000);
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} while (!(cmd.response[0] & OCR_BUSY) && timeout--);
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if (timeout <= 0) {
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dev_dbg(&mci->dev, "SD operation condition set timed out\n");
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return -ENODEV;
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}
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mci->version = MMC_VERSION_UNKNOWN;
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mci->ocr = cmd.response[0];
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mci->high_capacity = ((mci->ocr & OCR_HCS) == OCR_HCS);
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mci->rca = 0;
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return 0;
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}
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/**
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* FIXME
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* @param mci MCI instance
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* @param ext_csd Buffer for a 512 byte sized extended CSD
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* @return Transaction status (0 on success)
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*
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* Note: Only cards newer than Version 1.1 (Physical Layer Spec) support
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* this command
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*/
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static int mci_send_ext_csd(struct mci *mci, char *ext_csd)
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{
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struct mci_cmd cmd;
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struct mci_data data;
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/* Get the Card Status Register */
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mci_setup_cmd(&cmd, MMC_CMD_SEND_EXT_CSD, 0, MMC_RSP_R1);
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data.dest = ext_csd;
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data.blocks = 1;
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data.blocksize = 512;
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data.flags = MMC_DATA_READ;
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return mci_send_cmd(mci, &cmd, &data);
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}
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/**
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* FIXME
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* @param mci MCI instance
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* @param set FIXME
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* @param index FIXME
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* @param value FIXME
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* @return Transaction status (0 on success)
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*/
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static int mci_switch(struct mci *mci, unsigned set, unsigned index,
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unsigned value)
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{
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struct mci_cmd cmd;
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mci_setup_cmd(&cmd, MMC_CMD_SWITCH,
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(MMC_SWITCH_MODE_WRITE_BYTE << 24) |
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(index << 16) |
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(value << 8),
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MMC_RSP_R1b);
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return mci_send_cmd(mci, &cmd, NULL);
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}
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static int mci_calc_blk_cnt(uint64_t cap, unsigned shift)
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{
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unsigned ret = cap >> shift;
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if (ret > 0x7fffffff) {
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pr_warn("Limiting card size due to 31 bit contraints\n");
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return 0x7fffffff;
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}
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return (int)ret;
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}
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static void mci_part_add(struct mci *mci, uint64_t size,
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unsigned int part_cfg, char *name, char *partname, int idx, bool ro,
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int area_type)
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{
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struct mci_part *part = &mci->part[mci->nr_parts];
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part->mci = mci;
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part->size = size;
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part->blk.cdev.name = name;
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part->blk.cdev.partname = partname;
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part->blk.blockbits = SECTOR_SHIFT;
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part->blk.num_blocks = mci_calc_blk_cnt(size, part->blk.blockbits);
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part->area_type = area_type;
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part->part_cfg = part_cfg;
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mci->nr_parts++;
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}
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/**
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* Change transfer frequency for an MMC card
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* @param mci MCI instance
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* @return Transaction status (0 on success)
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*/
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static int mmc_change_freq(struct mci *mci)
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{
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char cardtype;
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int err;
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mci->ext_csd = xmalloc(512);
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mci->card_caps = 0;
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/* Only version 4 supports high-speed */
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if (mci->version < MMC_VERSION_4)
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return 0;
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mci->card_caps |= MMC_CAP_4_BIT_DATA;
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err = mci_send_ext_csd(mci, mci->ext_csd);
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if (err) {
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dev_dbg(&mci->dev, "Preparing for frequency setup failed: %d\n", err);
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return err;
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}
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cardtype = mci->ext_csd[EXT_CSD_CARD_TYPE] & EXT_CSD_CARD_TYPE_MASK;
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err = mci_switch(mci, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1);
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if (err) {
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dev_dbg(&mci->dev, "MMC frequency changing failed: %d\n", err);
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return err;
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}
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|
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/* Now check to see that it worked */
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err = mci_send_ext_csd(mci, mci->ext_csd);
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if (err) {
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dev_dbg(&mci->dev, "Verifying frequency change failed: %d\n", err);
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return err;
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}
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|
|
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/* No high-speed support */
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if (!mci->ext_csd[EXT_CSD_HS_TIMING]) {
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dev_dbg(&mci->dev, "No high-speed support\n");
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return 0;
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}
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|
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/* High Speed is set, there are two types: 52MHz and 26MHz */
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if (cardtype & EXT_CSD_CARD_TYPE_52)
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mci->card_caps |= MMC_CAP_MMC_HIGHSPEED_52MHZ | MMC_CAP_MMC_HIGHSPEED;
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else
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mci->card_caps |= MMC_CAP_MMC_HIGHSPEED;
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|
|
|
if (IS_ENABLED(CONFIG_MCI_MMC_BOOT_PARTITIONS) &&
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mci->ext_csd[EXT_CSD_REV] >= 3 && mci->ext_csd[EXT_CSD_BOOT_MULT]) {
|
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int idx;
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unsigned int part_size;
|
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|
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for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
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char *name, *partname;
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part_size = mci->ext_csd[EXT_CSD_BOOT_MULT] << 17;
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partname = asprintf("boot%d", idx);
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name = asprintf("%s.%s", mci->cdevname, partname);
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mci_part_add(mci, part_size,
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EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
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name, partname, idx, true,
|
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MMC_BLK_DATA_AREA_BOOT);
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}
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|
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mci->ext_csd_part_config = mci->ext_csd[EXT_CSD_PART_CONFIG];
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mci->bootpart = (mci->ext_csd_part_config >> 3) & 0x7;
|
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}
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|
|
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return 0;
|
|
}
|
|
|
|
/**
|
|
* FIXME
|
|
* @param mci MCI instance
|
|
* @param mode FIXME
|
|
* @param group FIXME
|
|
* @param value FIXME
|
|
* @param resp FIXME
|
|
* @return Transaction status (0 on success)
|
|
*/
|
|
static int sd_switch(struct mci *mci, unsigned mode, unsigned group,
|
|
unsigned value, uint8_t *resp)
|
|
{
|
|
struct mci_cmd cmd;
|
|
struct mci_data data;
|
|
unsigned arg;
|
|
|
|
arg = (mode << 31) | 0xffffff;
|
|
arg &= ~(0xf << (group << 2));
|
|
arg |= value << (group << 2);
|
|
|
|
/* Switch the frequency */
|
|
mci_setup_cmd(&cmd, SD_CMD_SWITCH_FUNC, arg, MMC_RSP_R1);
|
|
|
|
data.dest = resp;
|
|
data.blocksize = 64;
|
|
data.blocks = 1;
|
|
data.flags = MMC_DATA_READ;
|
|
|
|
return mci_send_cmd(mci, &cmd, &data);
|
|
}
|
|
|
|
/**
|
|
* Change transfer frequency for an SD card
|
|
* @param mci MCI instance
|
|
* @return Transaction status (0 on success)
|
|
*/
|
|
static int sd_change_freq(struct mci *mci)
|
|
{
|
|
struct mci_cmd cmd;
|
|
struct mci_data data;
|
|
struct mci_host *host = mci->host;
|
|
uint32_t *switch_status = sector_buf;
|
|
uint32_t *scr = sector_buf;
|
|
int timeout;
|
|
int err;
|
|
|
|
if (mmc_host_is_spi(host))
|
|
return 0;
|
|
|
|
dev_dbg(&mci->dev, "Changing transfer frequency\n");
|
|
mci->card_caps = 0;
|
|
|
|
/* Read the SCR to find out if this card supports higher speeds */
|
|
mci_setup_cmd(&cmd, MMC_CMD_APP_CMD, mci->rca << 16, MMC_RSP_R1);
|
|
err = mci_send_cmd(mci, &cmd, NULL);
|
|
if (err) {
|
|
dev_dbg(&mci->dev, "Query SD card capabilities failed: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
mci_setup_cmd(&cmd, SD_CMD_APP_SEND_SCR, 0, MMC_RSP_R1);
|
|
|
|
timeout = 3;
|
|
|
|
retry_scr:
|
|
dev_dbg(&mci->dev, "Trying to read the SCR (try %d of %d)\n", 4 - timeout, 3);
|
|
data.dest = (char *)scr;
|
|
data.blocksize = 8;
|
|
data.blocks = 1;
|
|
data.flags = MMC_DATA_READ;
|
|
|
|
err = mci_send_cmd(mci, &cmd, &data);
|
|
if (err) {
|
|
dev_dbg(&mci->dev, " Catch error (%d)", err);
|
|
if (timeout--) {
|
|
dev_dbg(&mci->dev, "-- retrying\n");
|
|
goto retry_scr;
|
|
}
|
|
dev_dbg(&mci->dev, "-- giving up\n");
|
|
return err;
|
|
}
|
|
|
|
mci->scr[0] = __be32_to_cpu(scr[0]);
|
|
mci->scr[1] = __be32_to_cpu(scr[1]);
|
|
|
|
switch ((mci->scr[0] >> 24) & 0xf) {
|
|
case 0:
|
|
mci->version = SD_VERSION_1_0;
|
|
break;
|
|
case 1:
|
|
mci->version = SD_VERSION_1_10;
|
|
break;
|
|
case 2:
|
|
mci->version = SD_VERSION_2;
|
|
break;
|
|
default:
|
|
mci->version = SD_VERSION_1_0;
|
|
break;
|
|
}
|
|
|
|
/* Version 1.0 doesn't support switching */
|
|
if (mci->version == SD_VERSION_1_0)
|
|
return 0;
|
|
|
|
timeout = 4;
|
|
while (timeout--) {
|
|
err = sd_switch(mci, SD_SWITCH_CHECK, 0, 1,
|
|
(uint8_t*)switch_status);
|
|
if (err) {
|
|
dev_dbg(&mci->dev, "Checking SD transfer switch frequency feature failed: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
/* The high-speed function is busy. Try again */
|
|
if (!(__be32_to_cpu(switch_status[7]) & SD_HIGHSPEED_BUSY))
|
|
break;
|
|
}
|
|
|
|
if (mci->scr[0] & SD_DATA_4BIT)
|
|
mci->card_caps |= MMC_CAP_4_BIT_DATA;
|
|
|
|
/* If high-speed isn't supported, we return */
|
|
if (!(__be32_to_cpu(switch_status[3]) & SD_HIGHSPEED_SUPPORTED))
|
|
return 0;
|
|
|
|
err = sd_switch(mci, SD_SWITCH_SWITCH, 0, 1, (uint8_t*)switch_status);
|
|
if (err) {
|
|
dev_dbg(&mci->dev, "Switching SD transfer frequency failed: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
if ((__be32_to_cpu(switch_status[4]) & 0x0f000000) == 0x01000000)
|
|
mci->card_caps |= MMC_CAP_SD_HIGHSPEED;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Setup host's interface bus width and transfer frequency
|
|
* @param mci MCI instance
|
|
*/
|
|
static void mci_set_ios(struct mci *mci)
|
|
{
|
|
struct mci_host *host = mci->host;
|
|
struct mci_ios ios;
|
|
|
|
ios.bus_width = host->bus_width;
|
|
ios.clock = host->clock;
|
|
|
|
host->set_ios(host, &ios);
|
|
}
|
|
|
|
/**
|
|
* Setup host's interface transfer frequency
|
|
* @param mci MCI instance
|
|
* @param clock New clock in Hz to set
|
|
*/
|
|
static void mci_set_clock(struct mci *mci, unsigned clock)
|
|
{
|
|
struct mci_host *host = mci->host;
|
|
|
|
/* check against any given limits at the host's side */
|
|
if (clock > host->f_max)
|
|
clock = host->f_max;
|
|
|
|
if (clock < host->f_min)
|
|
clock = host->f_min;
|
|
|
|
host->clock = clock; /* the new target frequency */
|
|
mci_set_ios(mci);
|
|
}
|
|
|
|
/**
|
|
* Setup host's interface bus width
|
|
* @param mci MCI instance
|
|
* @param width New interface bit width (1, 4 or 8)
|
|
*/
|
|
static void mci_set_bus_width(struct mci *mci, unsigned width)
|
|
{
|
|
struct mci_host *host = mci->host;
|
|
|
|
host->bus_width = width; /* the new target bus width */
|
|
mci_set_ios(mci);
|
|
}
|
|
|
|
/**
|
|
* Extract card's version from its CSD
|
|
* @param mci MCI instance
|
|
* @return 0 on success
|
|
*/
|
|
static void mci_detect_version_from_csd(struct mci *mci)
|
|
{
|
|
int version;
|
|
char *vstr;
|
|
|
|
if (mci->version == MMC_VERSION_UNKNOWN) {
|
|
/* the version is coded in the bits 127:126 (left aligned) */
|
|
version = (mci->csd[0] >> 26) & 0xf; /* FIXME why other width? */
|
|
|
|
switch (version) {
|
|
case 0:
|
|
vstr = "1.2";
|
|
mci->version = MMC_VERSION_1_2;
|
|
break;
|
|
case 1:
|
|
vstr = "1.4";
|
|
mci->version = MMC_VERSION_1_4;
|
|
break;
|
|
case 2:
|
|
vstr = "2.2";
|
|
mci->version = MMC_VERSION_2_2;
|
|
break;
|
|
case 3:
|
|
vstr = "3.0";
|
|
mci->version = MMC_VERSION_3;
|
|
break;
|
|
case 4:
|
|
vstr = "4.0";
|
|
mci->version = MMC_VERSION_4;
|
|
break;
|
|
default:
|
|
vstr = "unknown, fallback to 1.2";
|
|
mci->version = MMC_VERSION_1_2;
|
|
break;
|
|
}
|
|
|
|
dev_info(&mci->dev, "detected card version %s\n", vstr);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* meaning of the encoded 'unit' bits in the CSD's field 'TRAN_SPEED'
|
|
* (divided by 10 to be nice to platforms without floating point)
|
|
*/
|
|
static const unsigned tran_speed_unit[] = {
|
|
[0] = 10000, /* 100 kbit/s */
|
|
[1] = 100000, /* 1 Mbit/s */
|
|
[2] = 1000000, /* 10 Mbit/s */
|
|
[3] = 10000000, /* 100 Mbit/s */
|
|
/* [4]...[7] are reserved */
|
|
};
|
|
|
|
/**
|
|
* meaning of the 'time' bits in the CSD's field 'TRAN_SPEED'
|
|
* (multiplied by 10 to be nice to platforms without floating point)
|
|
*/
|
|
static const unsigned char tran_speed_time[] = {
|
|
0, /* reserved */
|
|
10, /* 1.0 ns */
|
|
12, /* 1.2 ns */
|
|
13,
|
|
15,
|
|
20,
|
|
25,
|
|
30,
|
|
35,
|
|
40,
|
|
45,
|
|
50,
|
|
55,
|
|
60,
|
|
70, /* 7.0 ns */
|
|
80, /* 8.0 ns */
|
|
};
|
|
|
|
/**
|
|
* Extract max. transfer speed from the CSD
|
|
* @param mci MCI instance
|
|
*
|
|
* Encoded in bit 103:96 (103: reserved, 102:99: time, 98:96 unit)
|
|
*/
|
|
static void mci_extract_max_tran_speed_from_csd(struct mci *mci)
|
|
{
|
|
unsigned unit, time;
|
|
|
|
unit = tran_speed_unit[(mci->csd[0] & 0x7)];
|
|
time = tran_speed_time[((mci->csd[0] >> 3) & 0xf)];
|
|
if ((unit == 0) || (time == 0)) {
|
|
dev_dbg(&mci->dev, "Unsupported 'TRAN_SPEED' unit/time value."
|
|
" Can't calculate card's max. transfer speed\n");
|
|
return;
|
|
}
|
|
|
|
mci->tran_speed = time * unit;
|
|
dev_dbg(&mci->dev, "Transfer speed: %u\n", mci->tran_speed);
|
|
}
|
|
|
|
/**
|
|
* Extract max read and write block length from the CSD
|
|
* @param mci MCI instance
|
|
*
|
|
* Encoded in bit 83:80 (read) and 25:22 (write)
|
|
*/
|
|
static void mci_extract_block_lengths_from_csd(struct mci *mci)
|
|
{
|
|
mci->read_bl_len = 1 << UNSTUFF_BITS(mci->csd, 80, 4);
|
|
|
|
if (IS_SD(mci))
|
|
mci->write_bl_len = mci->read_bl_len; /* FIXME why? */
|
|
else
|
|
mci->write_bl_len = 1 << ((mci->csd[3] >> 22) & 0xf);
|
|
|
|
dev_dbg(&mci->dev, "Max. block length are: Write=%u, Read=%u Bytes\n",
|
|
mci->write_bl_len, mci->read_bl_len);
|
|
}
|
|
|
|
/**
|
|
* Extract card's capacitiy from the CSD
|
|
* @param mci MCI instance
|
|
*/
|
|
static void mci_extract_card_capacity_from_csd(struct mci *mci)
|
|
{
|
|
uint64_t csize, cmult;
|
|
|
|
if (mci->high_capacity) {
|
|
if (IS_SD(mci)) {
|
|
csize = UNSTUFF_BITS(mci->csd, 48, 22);
|
|
mci->capacity = (1 + csize) << 10;
|
|
} else {
|
|
mci->capacity = mci->ext_csd[EXT_CSD_SEC_CNT] << 0 |
|
|
mci->ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
|
|
mci->ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
|
|
mci->ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
|
|
}
|
|
} else {
|
|
cmult = UNSTUFF_BITS(mci->csd, 47, 3);
|
|
csize = UNSTUFF_BITS(mci->csd, 62, 12);
|
|
mci->capacity = (csize + 1) << (cmult + 2);
|
|
}
|
|
|
|
mci->capacity *= 1 << UNSTUFF_BITS(mci->csd, 80, 4);;
|
|
dev_dbg(&mci->dev, "Capacity: %u MiB\n", (unsigned)(mci->capacity >> 20));
|
|
}
|
|
|
|
static int mmc_compare_ext_csds(struct mci *mci, unsigned bus_width)
|
|
{
|
|
u8 *bw_ext_csd;
|
|
int err;
|
|
|
|
if (bus_width == MMC_BUS_WIDTH_1)
|
|
return 0;
|
|
|
|
bw_ext_csd = xmalloc(512);
|
|
err = mci_send_ext_csd(mci, bw_ext_csd);
|
|
if (err) {
|
|
dev_info(&mci->dev, "mci_send_ext_csd failed with %d\n", err);
|
|
if (bus_width != MMC_BUS_WIDTH_1)
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (bus_width == MMC_BUS_WIDTH_1)
|
|
goto out;
|
|
/* only compare read only fields */
|
|
err = (mci->ext_csd[EXT_CSD_PARTITION_SUPPORT] ==
|
|
bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
|
|
(mci->ext_csd[EXT_CSD_ERASED_MEM_CONT] ==
|
|
bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
|
|
(mci->ext_csd[EXT_CSD_REV] ==
|
|
bw_ext_csd[EXT_CSD_REV]) &&
|
|
(mci->ext_csd[EXT_CSD_STRUCTURE] ==
|
|
bw_ext_csd[EXT_CSD_STRUCTURE]) &&
|
|
(mci->ext_csd[EXT_CSD_CARD_TYPE] ==
|
|
bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
|
|
(mci->ext_csd[EXT_CSD_S_A_TIMEOUT] ==
|
|
bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
|
|
(mci->ext_csd[EXT_CSD_HC_WP_GRP_SIZE] ==
|
|
bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
|
|
(mci->ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT] ==
|
|
bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
|
|
(mci->ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] ==
|
|
bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
|
|
(mci->ext_csd[EXT_CSD_SEC_TRIM_MULT] ==
|
|
bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
|
|
(mci->ext_csd[EXT_CSD_SEC_ERASE_MULT] ==
|
|
bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
|
|
(mci->ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT] ==
|
|
bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
|
|
(mci->ext_csd[EXT_CSD_TRIM_MULT] ==
|
|
bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
|
|
(mci->ext_csd[EXT_CSD_SEC_CNT + 0] ==
|
|
bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
|
|
(mci->ext_csd[EXT_CSD_SEC_CNT + 1] ==
|
|
bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
|
|
(mci->ext_csd[EXT_CSD_SEC_CNT + 2] ==
|
|
bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
|
|
(mci->ext_csd[EXT_CSD_SEC_CNT + 3] ==
|
|
bw_ext_csd[EXT_CSD_SEC_CNT + 3]) ?
|
|
0 : -EINVAL;
|
|
|
|
out:
|
|
free(bw_ext_csd);
|
|
return err;
|
|
}
|
|
|
|
static int mci_startup_sd(struct mci *mci)
|
|
{
|
|
struct mci_cmd cmd;
|
|
int err;
|
|
|
|
if (mci_caps(mci) & MMC_CAP_4_BIT_DATA) {
|
|
dev_dbg(&mci->dev, "Prepare for bus width change\n");
|
|
mci_setup_cmd(&cmd, MMC_CMD_APP_CMD, mci->rca << 16, MMC_RSP_R1);
|
|
err = mci_send_cmd(mci, &cmd, NULL);
|
|
if (err) {
|
|
dev_dbg(&mci->dev, "Preparing SD for bus width change failed: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
dev_dbg(&mci->dev, "Set SD bus width to 4 bit\n");
|
|
mci_setup_cmd(&cmd, SD_CMD_APP_SET_BUS_WIDTH, 2, MMC_RSP_R1);
|
|
err = mci_send_cmd(mci, &cmd, NULL);
|
|
if (err) {
|
|
dev_dbg(&mci->dev, "Changing SD bus width failed: %d\n", err);
|
|
/* TODO continue with 1 bit? */
|
|
return err;
|
|
}
|
|
mci_set_bus_width(mci, MMC_BUS_WIDTH_4);
|
|
}
|
|
|
|
mci_set_clock(mci, mci->tran_speed);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mci_startup_mmc(struct mci *mci)
|
|
{
|
|
struct mci_host *host = mci->host;
|
|
int err;
|
|
int idx = 0;
|
|
static unsigned ext_csd_bits[] = {
|
|
EXT_CSD_BUS_WIDTH_4,
|
|
EXT_CSD_BUS_WIDTH_8,
|
|
};
|
|
static unsigned bus_widths[] = {
|
|
MMC_BUS_WIDTH_4,
|
|
MMC_BUS_WIDTH_8,
|
|
};
|
|
|
|
/* if possible, speed up the transfer */
|
|
if (mci_caps(mci) & MMC_CAP_MMC_HIGHSPEED) {
|
|
if (mci->card_caps & MMC_CAP_MMC_HIGHSPEED_52MHZ)
|
|
mci->tran_speed = 52000000;
|
|
else
|
|
mci->tran_speed = 26000000;
|
|
}
|
|
|
|
mci_set_clock(mci, mci->tran_speed);
|
|
|
|
/*
|
|
* Unlike SD, MMC cards dont have a configuration register to notify
|
|
* supported bus width. So bus test command should be run to identify
|
|
* the supported bus width or compare the ext csd values of current
|
|
* bus width and ext csd values of 1 bit mode read earlier.
|
|
*/
|
|
if (host->host_caps & MMC_CAP_8_BIT_DATA)
|
|
idx = 1;
|
|
|
|
for (; idx >= 0; idx--) {
|
|
|
|
/*
|
|
* Host is capable of 8bit transfer, then switch
|
|
* the device to work in 8bit transfer mode. If the
|
|
* mmc switch command returns error then switch to
|
|
* 4bit transfer mode. On success set the corresponding
|
|
* bus width on the host.
|
|
*/
|
|
err = mci_switch(mci, EXT_CSD_CMD_SET_NORMAL,
|
|
EXT_CSD_BUS_WIDTH,
|
|
ext_csd_bits[idx]);
|
|
if (err)
|
|
continue;
|
|
|
|
mci_set_bus_width(mci, bus_widths[idx]);
|
|
|
|
err = mmc_compare_ext_csds(mci, bus_widths[idx]);
|
|
if (!err)
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Scan the given host interfaces and detect connected MMC/SD cards
|
|
* @param mci MCI instance
|
|
* @return 0 on success, negative value else
|
|
*/
|
|
static int mci_startup(struct mci *mci)
|
|
{
|
|
struct mci_host *host = mci->host;
|
|
struct mci_cmd cmd;
|
|
int err;
|
|
|
|
if (IS_ENABLED(CONFIG_MMC_SPI_CRC_ON) && mmc_host_is_spi(host)) { /* enable CRC check for spi */
|
|
|
|
mci_setup_cmd(&cmd, MMC_CMD_SPI_CRC_ON_OFF, 1, MMC_RSP_R1);
|
|
err = mci_send_cmd(mci, &cmd, NULL);
|
|
|
|
if (err) {
|
|
dev_dbg(&mci->dev, "Can't enable CRC check : %d\n", err);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
dev_dbg(&mci->dev, "Put the Card in Identify Mode\n");
|
|
|
|
/* Put the Card in Identify Mode */
|
|
mci_setup_cmd(&cmd, mmc_host_is_spi(host) ? MMC_CMD_SEND_CID : MMC_CMD_ALL_SEND_CID, 0, MMC_RSP_R2);
|
|
err = mci_send_cmd(mci, &cmd, NULL);
|
|
if (err) {
|
|
dev_dbg(&mci->dev, "Can't bring card into identify mode: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
memcpy(mci->cid, cmd.response, 16);
|
|
|
|
dev_dbg(&mci->dev, "Card's identification data is: %08X-%08X-%08X-%08X\n",
|
|
mci->cid[0], mci->cid[1], mci->cid[2], mci->cid[3]);
|
|
|
|
/*
|
|
* For MMC cards, set the Relative Address.
|
|
* For SD cards, get the Relatvie Address.
|
|
* This also puts the cards into Standby State
|
|
*/
|
|
if (!mmc_host_is_spi(host)) { /* cmd not supported in spi */
|
|
dev_dbg(&mci->dev, "Get/Set relative address\n");
|
|
mci_setup_cmd(&cmd, SD_CMD_SEND_RELATIVE_ADDR, mci->rca << 16, MMC_RSP_R6);
|
|
err = mci_send_cmd(mci, &cmd, NULL);
|
|
if (err) {
|
|
dev_dbg(&mci->dev, "Get/Set relative address failed: %d\n", err);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
if (IS_SD(mci))
|
|
mci->rca = (cmd.response[0] >> 16) & 0xffff;
|
|
|
|
dev_dbg(&mci->dev, "Get card's specific data\n");
|
|
/* Get the Card-Specific Data */
|
|
mci_setup_cmd(&cmd, MMC_CMD_SEND_CSD, mci->rca << 16, MMC_RSP_R2);
|
|
err = mci_send_cmd(mci, &cmd, NULL);
|
|
if (err) {
|
|
dev_dbg(&mci->dev, "Getting card's specific data failed: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
/* CSD is of 128 bit */
|
|
memcpy(mci->csd, cmd.response, 16);
|
|
|
|
dev_dbg(&mci->dev, "Card's specific data is: %08X-%08X-%08X-%08X\n",
|
|
mci->csd[0], mci->csd[1], mci->csd[2], mci->csd[3]);
|
|
|
|
mci_detect_version_from_csd(mci);
|
|
mci_extract_max_tran_speed_from_csd(mci);
|
|
mci_extract_block_lengths_from_csd(mci);
|
|
|
|
/* sanitiy? */
|
|
if (mci->read_bl_len > SECTOR_SIZE) {
|
|
mci->read_bl_len = SECTOR_SIZE;
|
|
dev_dbg(&mci->dev, "Limiting max. read block size down to %u\n",
|
|
mci->read_bl_len);
|
|
}
|
|
|
|
if (mci->write_bl_len > SECTOR_SIZE) {
|
|
mci->write_bl_len = SECTOR_SIZE;
|
|
dev_dbg(&mci->dev, "Limiting max. write block size down to %u\n",
|
|
mci->read_bl_len);
|
|
}
|
|
dev_dbg(&mci->dev, "Read block length: %u, Write block length: %u\n",
|
|
mci->read_bl_len, mci->write_bl_len);
|
|
|
|
if (!mmc_host_is_spi(host)) { /* cmd not supported in spi */
|
|
dev_dbg(&mci->dev, "Select the card, and put it into Transfer Mode\n");
|
|
/* Select the card, and put it into Transfer Mode */
|
|
mci_setup_cmd(&cmd, MMC_CMD_SELECT_CARD, mci->rca << 16, MMC_RSP_R1b);
|
|
err = mci_send_cmd(mci, &cmd, NULL);
|
|
if (err) {
|
|
dev_dbg(&mci->dev, "Putting in transfer mode failed: %d\n", err);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
if (IS_SD(mci))
|
|
err = sd_change_freq(mci);
|
|
else
|
|
err = mmc_change_freq(mci);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
mci_extract_card_capacity_from_csd(mci);
|
|
|
|
if (IS_SD(mci))
|
|
err = mci_startup_sd(mci);
|
|
else
|
|
err = mci_startup_mmc(mci);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
/* we setup the blocklength only one times for all accesses to this media */
|
|
err = mci_set_blocklen(mci, mci->read_bl_len);
|
|
|
|
mci_part_add(mci, mci->capacity, 0,
|
|
mci->cdevname, NULL, 0, true,
|
|
MMC_BLK_DATA_AREA_MAIN);
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* Detect a SD 2.0 card and enable its features
|
|
* @param mci MCI instance
|
|
* @return Transfer status (0 on success)
|
|
*
|
|
* By issuing the CMD8 command SDHC/SDXC cards realize that the host supports
|
|
* the Physical Layer Version 2.00 or later and the card can enable
|
|
* corresponding new functions.
|
|
*
|
|
* If this CMD8 command will end with a timeout it is a MultiMediaCard only.
|
|
*/
|
|
static int sd_send_if_cond(struct mci *mci)
|
|
{
|
|
struct mci_host *host = mci->host;
|
|
struct mci_cmd cmd;
|
|
int err;
|
|
|
|
mci_setup_cmd(&cmd, SD_CMD_SEND_IF_COND,
|
|
/* We set the bit if the host supports voltages between 2.7 and 3.6 V */
|
|
((host->voltages & 0x00ff8000) != 0) << 8 | 0xaa,
|
|
MMC_RSP_R7);
|
|
err = mci_send_cmd(mci, &cmd, NULL);
|
|
if (err) {
|
|
dev_dbg(&mci->dev, "Query interface conditions failed: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
if ((cmd.response[0] & 0xff) != 0xaa) {
|
|
dev_dbg(&mci->dev, "Card cannot work with hosts supply voltages\n");
|
|
return -EINVAL;
|
|
} else {
|
|
dev_dbg(&mci->dev, "SD Card Rev. 2.00 or later detected\n");
|
|
mci->version = SD_VERSION_2;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mci_blk_part_switch(struct mci_part *part)
|
|
{
|
|
struct mci *mci = part->mci;
|
|
int ret;
|
|
|
|
if (!IS_ENABLED(CONFIG_MCI_MMC_BOOT_PARTITIONS))
|
|
return 0;
|
|
|
|
if (mci->part_curr == part)
|
|
return 0;
|
|
|
|
if (!IS_SD(mci)) {
|
|
u8 part_config = mci->ext_csd_part_config;
|
|
|
|
part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
|
|
part_config |= part->part_cfg;
|
|
|
|
ret = mci_switch(mci, EXT_CSD_CMD_SET_NORMAL,
|
|
EXT_CSD_PART_CONFIG, part_config);
|
|
if (ret)
|
|
return ret;
|
|
|
|
mci->ext_csd_part_config = part_config;
|
|
}
|
|
|
|
mci->part_curr = part;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* ------------------ attach to the blocklayer --------------------------- */
|
|
|
|
/**
|
|
* Write a chunk of sectors to media
|
|
* @param blk All info about the block device we need
|
|
* @param buffer Buffer to write from
|
|
* @param block Sector's number to start write to
|
|
* @param num_blocks Sector count to write
|
|
* @return 0 on success, anything else on failure
|
|
*
|
|
* This routine expects the buffer has the correct size to read all data!
|
|
*/
|
|
static int __maybe_unused mci_sd_write(struct block_device *blk,
|
|
const void *buffer, int block, int num_blocks)
|
|
{
|
|
struct mci_part *part = container_of(blk, struct mci_part, blk);
|
|
struct mci *mci = part->mci;
|
|
struct mci_host *host = mci->host;
|
|
int rc;
|
|
unsigned max_req_block = num_blocks;
|
|
int write_block;
|
|
|
|
if (mci->host->max_req_size)
|
|
max_req_block = mci->host->max_req_size / mci->write_bl_len;
|
|
|
|
mci_blk_part_switch(part);
|
|
|
|
if (host->card_write_protected && host->card_write_protected(host)) {
|
|
dev_err(&mci->dev, "card write protected\n");
|
|
return -EPERM;
|
|
}
|
|
|
|
dev_dbg(&mci->dev, "%s: Write %d block(s), starting at %d\n",
|
|
__func__, num_blocks, block);
|
|
|
|
if (mci->write_bl_len != SECTOR_SIZE) {
|
|
dev_dbg(&mci->dev, "MMC/SD block size is not %d bytes (its %u bytes instead)\n",
|
|
SECTOR_SIZE, mci->read_bl_len);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* size of the block number field in the MMC/SD command is 32 bit only */
|
|
if (block > MAX_BUFFER_NUMBER) {
|
|
dev_dbg(&mci->dev, "Cannot handle block number %d. Too large!\n", block);
|
|
return -EINVAL;
|
|
}
|
|
|
|
while (num_blocks) {
|
|
write_block = min_t(int, num_blocks, max_req_block);
|
|
rc = mci_block_write(mci, buffer, block, write_block);
|
|
if (rc != 0) {
|
|
dev_dbg(&mci->dev, "Writing block %d failed with %d\n", block, rc);
|
|
return rc;
|
|
}
|
|
num_blocks -= write_block;
|
|
block += write_block;
|
|
buffer += write_block * mci->write_bl_len;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Read a chunk of sectors from the drive
|
|
* @param blk All info about the block device we need
|
|
* @param buffer Buffer to read into
|
|
* @param block Sector's LBA number to start read from
|
|
* @param num_blocks Sector count to read
|
|
* @return 0 on success, anything else on failure
|
|
*
|
|
* This routine expects the buffer has the correct size to store all data!
|
|
*/
|
|
static int mci_sd_read(struct block_device *blk, void *buffer, int block,
|
|
int num_blocks)
|
|
{
|
|
struct mci_part *part = container_of(blk, struct mci_part, blk);
|
|
struct mci *mci = part->mci;
|
|
unsigned max_req_block = num_blocks;
|
|
int read_block;
|
|
int rc;
|
|
|
|
if (mci->host->max_req_size)
|
|
max_req_block = mci->host->max_req_size / mci->read_bl_len;
|
|
|
|
mci_blk_part_switch(part);
|
|
|
|
dev_dbg(&mci->dev, "%s: Read %d block(s), starting at %d\n",
|
|
__func__, num_blocks, block);
|
|
|
|
if (mci->read_bl_len != 512) {
|
|
dev_dbg(&mci->dev, "MMC/SD block size is not 512 bytes (its %u bytes instead)\n",
|
|
mci->read_bl_len);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (block > MAX_BUFFER_NUMBER) {
|
|
dev_err(&mci->dev, "Cannot handle block number %d. Too large!\n", block);
|
|
return -EINVAL;
|
|
}
|
|
|
|
while (num_blocks) {
|
|
read_block = min_t(int, num_blocks, max_req_block);
|
|
rc = mci_read_block(mci, buffer, block, read_block);
|
|
if (rc != 0) {
|
|
dev_dbg(&mci->dev, "Reading block %d failed with %d\n", block, rc);
|
|
return rc;
|
|
}
|
|
num_blocks -= read_block;
|
|
block += read_block;
|
|
buffer += read_block * mci->read_bl_len;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* ------------------ attach to the device API --------------------------- */
|
|
|
|
/**
|
|
* Extract the Manufacturer ID from the CID
|
|
* @param mci Instance data
|
|
*
|
|
* The 'MID' is encoded in bit 127:120 in the CID
|
|
*/
|
|
static unsigned extract_mid(struct mci *mci)
|
|
{
|
|
if (!IS_SD(mci) && mci->version <= MMC_VERSION_1_4)
|
|
return UNSTUFF_BITS(mci->cid, 104, 24);
|
|
else
|
|
return UNSTUFF_BITS(mci->cid, 120, 8);
|
|
}
|
|
|
|
/**
|
|
* Extract the OEM/Application ID from the CID
|
|
* @param mci Instance data
|
|
*
|
|
* The 'OID' is encoded in bit 119:104 in the CID
|
|
*/
|
|
static unsigned extract_oid(struct mci *mci)
|
|
{
|
|
return (mci->cid[0] >> 8) & 0xffff;
|
|
}
|
|
|
|
/**
|
|
* Extract the product revision from the CID
|
|
* @param mci Instance data
|
|
*
|
|
* The 'PRV' is encoded in bit 63:56 in the CID
|
|
*/
|
|
static unsigned extract_prv(struct mci *mci)
|
|
{
|
|
return mci->cid[2] >> 24;
|
|
}
|
|
|
|
/**
|
|
* Extract the product serial number from the CID
|
|
* @param mci Instance data
|
|
*
|
|
* The 'PSN' is encoded in bit 55:24 in the CID
|
|
*/
|
|
static unsigned extract_psn(struct mci *mci)
|
|
{
|
|
if (IS_SD(mci)) {
|
|
return UNSTUFF_BITS(mci->csd, 24, 32);
|
|
} else {
|
|
if (mci->version > MMC_VERSION_1_4)
|
|
return UNSTUFF_BITS(mci->cid, 16, 32);
|
|
else
|
|
return UNSTUFF_BITS(mci->cid, 16, 24);
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Extract the month of the manufacturing date from the CID
|
|
* @param mci Instance data
|
|
*
|
|
* The 'MTD' is encoded in bit 19:8 in the CID, month in 11:8
|
|
*/
|
|
static unsigned extract_mtd_month(struct mci *mci)
|
|
{
|
|
if (IS_SD(mci))
|
|
return UNSTUFF_BITS(mci->cid, 8, 4);
|
|
else
|
|
return UNSTUFF_BITS(mci->cid, 12, 4);
|
|
}
|
|
|
|
/**
|
|
* Extract the year of the manufacturing date from the CID
|
|
* @param mci Instance data
|
|
*
|
|
* The 'MTD' is encoded in bit 19:8 in the CID, year in 19:12
|
|
* An encoded 0 means the year 2000
|
|
*/
|
|
static unsigned extract_mtd_year(struct mci *mci)
|
|
{
|
|
if (IS_SD(mci))
|
|
return UNSTUFF_BITS(mci->cid, 12, 8) + 2000;
|
|
else
|
|
return UNSTUFF_BITS(mci->cid, 8, 4) + 1997;
|
|
}
|
|
|
|
static void mci_print_caps(unsigned caps)
|
|
{
|
|
printf(" capabilities: %s%s%s%s%s\n",
|
|
caps & MMC_CAP_4_BIT_DATA ? "4bit " : "",
|
|
caps & MMC_CAP_8_BIT_DATA ? "8bit " : "",
|
|
caps & MMC_CAP_SD_HIGHSPEED ? "sd-hs " : "",
|
|
caps & MMC_CAP_MMC_HIGHSPEED ? "mmc-hs " : "",
|
|
caps & MMC_CAP_MMC_HIGHSPEED_52MHZ ? "mmc-52MHz " : "");
|
|
}
|
|
|
|
/**
|
|
* Output some valuable information when the user runs 'devinfo' on an MCI device
|
|
* @param mci MCI device instance
|
|
*/
|
|
static void mci_info(struct device_d *dev)
|
|
{
|
|
struct mci *mci = container_of(dev, struct mci, dev);
|
|
struct mci_host *host = mci->host;
|
|
int bw;
|
|
|
|
if (mci->ready_for_use == 0) {
|
|
printf(" No information available:\n MCI card not probed yet\n");
|
|
return;
|
|
}
|
|
|
|
printf("Host information:\n");
|
|
printf(" current clock: %d\n", host->clock);
|
|
|
|
if (host->bus_width == MMC_BUS_WIDTH_8)
|
|
bw = 8;
|
|
else if (host->bus_width == MMC_BUS_WIDTH_4)
|
|
bw = 4;
|
|
else
|
|
bw = 1;
|
|
|
|
printf(" current buswidth: %d\n", bw);
|
|
mci_print_caps(host->host_caps);
|
|
|
|
printf("Card information:\n");
|
|
if (mci->version < SD_VERSION_SD) {
|
|
printf(" Attached is a MultiMediaCard (Version: %u.%u)\n",
|
|
(mci->version >> 4) & 0xf, mci->version & 0xf);
|
|
} else {
|
|
printf(" Attached is an SD Card (Version: %u.%u)\n",
|
|
(mci->version >> 4) & 0xf, mci->version & 0xf);
|
|
}
|
|
printf(" Capacity: %u MiB\n", (unsigned)(mci->capacity >> 20));
|
|
|
|
if (mci->high_capacity)
|
|
printf(" High capacity card\n");
|
|
printf(" CID: %08X-%08X-%08X-%08X\n", mci->cid[0], mci->cid[1],
|
|
mci->cid[2], mci->cid[3]);
|
|
printf(" CSD: %08X-%08X-%08X-%08X\n", mci->csd[0], mci->csd[1],
|
|
mci->csd[2], mci->csd[3]);
|
|
printf(" Max. transfer speed: %u Hz\n", mci->tran_speed);
|
|
mci_print_caps(mci->card_caps);
|
|
printf(" Manufacturer ID: %02X\n", extract_mid(mci));
|
|
printf(" OEM/Application ID: %04X\n", extract_oid(mci));
|
|
printf(" Product name: '%c%c%c%c%c'\n", mci->cid[0] & 0xff,
|
|
(mci->cid[1] >> 24), (mci->cid[1] >> 16) & 0xff,
|
|
(mci->cid[1] >> 8) & 0xff, mci->cid[1] & 0xff);
|
|
printf(" Product revision: %u.%u\n", extract_prv(mci) >> 4,
|
|
extract_prv(mci) & 0xf);
|
|
printf(" Serial no: %0u\n", extract_psn(mci));
|
|
printf(" Manufacturing date: %u.%u\n", extract_mtd_month(mci),
|
|
extract_mtd_year(mci));
|
|
}
|
|
|
|
/**
|
|
* Check if the MCI card is already probed
|
|
* @param mci MCI device instance
|
|
* @return 0 when not probed yet, -EPERM if already probed
|
|
*
|
|
* @a barebox cannot really cope with hot plugging. So, probing an attached
|
|
* MCI card is a one time only job. If its already done, there is no way to
|
|
* return.
|
|
*/
|
|
static int mci_check_if_already_initialized(struct mci *mci)
|
|
{
|
|
if (mci->ready_for_use != 0)
|
|
return -EPERM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct block_device_ops mci_ops = {
|
|
.read = mci_sd_read,
|
|
#ifdef CONFIG_BLOCK_WRITE
|
|
.write = mci_sd_write,
|
|
#endif
|
|
};
|
|
|
|
static int mci_set_boot(struct param_d *param, void *priv)
|
|
{
|
|
struct mci *mci = priv;
|
|
|
|
mci->ext_csd_part_config &= ~(7 << 3);
|
|
mci->ext_csd_part_config |= mci->bootpart << 3;
|
|
|
|
return mci_switch(mci, EXT_CSD_CMD_SET_NORMAL,
|
|
EXT_CSD_PART_CONFIG, mci->ext_csd_part_config);
|
|
}
|
|
|
|
static const char *mci_boot_names[] = {
|
|
"disabled",
|
|
"boot0",
|
|
"boot1",
|
|
NULL, /* reserved */
|
|
NULL, /* reserved */
|
|
NULL, /* reserved */
|
|
NULL, /* reserved */
|
|
"user",
|
|
};
|
|
|
|
/**
|
|
* Probe an MCI card at the given host interface
|
|
* @param mci MCI device instance
|
|
* @return 0 on success, negative values else
|
|
*/
|
|
static int mci_card_probe(struct mci *mci)
|
|
{
|
|
struct mci_host *host = mci->host;
|
|
int i, rc, disknum;
|
|
|
|
if (host->card_present && !host->card_present(host)) {
|
|
dev_err(&mci->dev, "no card inserted\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* start with a host interface reset */
|
|
rc = (host->init)(host, &mci->dev);
|
|
if (rc) {
|
|
dev_err(&mci->dev, "Cannot reset the SD/MMC interface\n");
|
|
return rc;
|
|
}
|
|
|
|
mci_set_bus_width(mci, MMC_BUS_WIDTH_1);
|
|
/* according to the SD card spec the detection can happen at 400 kHz */
|
|
mci_set_clock(mci, 400000);
|
|
|
|
/* reset the card */
|
|
rc = mci_go_idle(mci);
|
|
if (rc) {
|
|
dev_warn(&mci->dev, "Cannot reset the SD/MMC card\n");
|
|
goto on_error;
|
|
}
|
|
|
|
/* Check if this card can handle the "SD Card Physical Layer Specification 2.0" */
|
|
rc = sd_send_if_cond(mci);
|
|
rc = sd_send_op_cond(mci);
|
|
if (rc && rc == -ETIMEDOUT) {
|
|
/* If the command timed out, we check for an MMC card */
|
|
dev_dbg(&mci->dev, "Card seems to be a MultiMediaCard\n");
|
|
rc = mmc_send_op_cond(mci);
|
|
}
|
|
|
|
if (rc)
|
|
goto on_error;
|
|
|
|
if (host->devname) {
|
|
mci->cdevname = strdup(host->devname);
|
|
} else {
|
|
disknum = cdev_find_free_index("disk");
|
|
mci->cdevname = asprintf("disk%d", disknum);
|
|
}
|
|
|
|
rc = mci_startup(mci);
|
|
if (rc) {
|
|
dev_dbg(&mci->dev, "Card's startup fails with %d\n", rc);
|
|
goto on_error;
|
|
}
|
|
|
|
dev_dbg(&mci->dev, "Card is up and running now, registering as a disk\n");
|
|
mci->ready_for_use = 1; /* TODO now or later? */
|
|
|
|
for (i = 0; i < mci->nr_parts; i++) {
|
|
struct mci_part *part = &mci->part[i];
|
|
|
|
/*
|
|
* An MMC/SD card acts like an ordinary disk.
|
|
* So, re-use the disk driver to gain access to this media
|
|
*/
|
|
part->blk.dev = &mci->dev;
|
|
part->blk.ops = &mci_ops;
|
|
|
|
rc = blockdevice_register(&part->blk);
|
|
if (rc != 0) {
|
|
dev_err(&mci->dev, "Failed to register MCI/SD blockdevice\n");
|
|
goto on_error;
|
|
}
|
|
dev_info(&mci->dev, "registered %s\n", part->blk.cdev.name);
|
|
|
|
/* create partitions on demand */
|
|
if (part->area_type == MMC_BLK_DATA_AREA_MAIN) {
|
|
rc = parse_partition_table(&part->blk);
|
|
if (rc != 0) {
|
|
dev_warn(&mci->dev, "No partition table found\n");
|
|
rc = 0; /* it's not a failure */
|
|
}
|
|
of_parse_partitions(&part->blk.cdev, host->hw_dev->device_node);
|
|
}
|
|
|
|
if (IS_ENABLED(CONFIG_MCI_MMC_BOOT_PARTITIONS) &&
|
|
part->area_type == MMC_BLK_DATA_AREA_BOOT &&
|
|
!mci->param_boot) {
|
|
mci->param_boot = dev_add_param_enum(&mci->dev, "boot",
|
|
mci_set_boot, NULL, &mci->bootpart,
|
|
mci_boot_names, ARRAY_SIZE(mci_boot_names), mci);
|
|
}
|
|
}
|
|
|
|
dev_dbg(&mci->dev, "SD Card successfully added\n");
|
|
|
|
on_error:
|
|
if (rc != 0) {
|
|
host->clock = 0; /* disable the MCI clock */
|
|
mci_set_ios(mci);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* Trigger probing of an attached MCI card
|
|
* @param mci_dev MCI device instance
|
|
* @param param FIXME
|
|
* @param val "0" does nothing, a "1" will probe for a MCI card
|
|
* @return 0 on success
|
|
*/
|
|
static int mci_set_probe(struct param_d *param, void *priv)
|
|
{
|
|
struct mci *mci = priv;
|
|
int rc;
|
|
|
|
if (!mci->probe)
|
|
return 0;
|
|
|
|
rc = mci_check_if_already_initialized(mci);
|
|
if (rc != 0)
|
|
return 0;
|
|
|
|
rc = mci_card_probe(mci);
|
|
if (rc != 0)
|
|
return rc;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mci_init(void)
|
|
{
|
|
sector_buf = xmemalign(32, 512);
|
|
|
|
return 0;
|
|
}
|
|
|
|
device_initcall(mci_init);
|
|
|
|
int mci_detect_card(struct mci_host *host)
|
|
{
|
|
int rc;
|
|
|
|
rc = mci_check_if_already_initialized(host->mci);
|
|
if (rc != 0)
|
|
return 0;
|
|
|
|
return mci_card_probe(host->mci);
|
|
}
|
|
|
|
static int mci_detect(struct device_d *dev)
|
|
{
|
|
struct mci *mci = container_of(dev, struct mci, dev);
|
|
|
|
return mci_detect_card(mci->host);
|
|
}
|
|
|
|
/**
|
|
* Create a new mci device (for convenience)
|
|
* @param host mci_host for this MCI device
|
|
* @return 0 on success
|
|
*/
|
|
int mci_register(struct mci_host *host)
|
|
{
|
|
struct mci *mci;
|
|
int ret;
|
|
|
|
mci = xzalloc(sizeof(*mci));
|
|
mci->host = host;
|
|
|
|
if (host->devname) {
|
|
strcpy(mci->dev.name, host->devname);
|
|
mci->dev.id = DEVICE_ID_SINGLE;
|
|
} else {
|
|
strcpy(mci->dev.name, "mci");
|
|
mci->dev.id = DEVICE_ID_DYNAMIC;
|
|
}
|
|
|
|
mci->dev.platform_data = host;
|
|
mci->dev.parent = host->hw_dev;
|
|
mci->host = host;
|
|
host->mci = mci;
|
|
mci->dev.detect = mci_detect;
|
|
|
|
ret = register_device(&mci->dev);
|
|
if (ret)
|
|
goto err_free;
|
|
|
|
dev_info(mci->host->hw_dev, "registered as %s\n", dev_name(&mci->dev));
|
|
|
|
mci->param_probe = dev_add_param_bool(&mci->dev, "probe",
|
|
mci_set_probe, NULL, &mci->probe, mci);
|
|
|
|
if (IS_ERR(mci->param_probe)) {
|
|
dev_dbg(&mci->dev, "Failed to add 'probe' parameter to the MCI device\n");
|
|
goto err_unregister;
|
|
}
|
|
|
|
if (IS_ENABLED(CONFIG_MCI_INFO))
|
|
mci->dev.info = mci_info;
|
|
|
|
/* if enabled, probe the attached card immediately */
|
|
if (IS_ENABLED(CONFIG_MCI_STARTUP))
|
|
mci_card_probe(mci);
|
|
|
|
return 0;
|
|
|
|
err_unregister:
|
|
unregister_device(&mci->dev);
|
|
err_free:
|
|
free(mci);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void mci_of_parse(struct mci_host *host)
|
|
{
|
|
struct device_node *np;
|
|
u32 bus_width;
|
|
|
|
if (!IS_ENABLED(CONFIG_OFDEVICE))
|
|
return;
|
|
|
|
if (!host->hw_dev || !host->hw_dev->device_node)
|
|
return;
|
|
|
|
np = host->hw_dev->device_node;
|
|
|
|
/* "bus-width" is translated to MMC_CAP_*_BIT_DATA flags */
|
|
if (of_property_read_u32(np, "bus-width", &bus_width) < 0) {
|
|
dev_dbg(host->hw_dev,
|
|
"\"bus-width\" property is missing, assuming 1 bit.\n");
|
|
bus_width = 1;
|
|
}
|
|
|
|
switch (bus_width) {
|
|
case 8:
|
|
host->host_caps |= MMC_CAP_8_BIT_DATA;
|
|
/* Hosts capable of 8-bit transfers can also do 4 bits */
|
|
case 4:
|
|
host->host_caps |= MMC_CAP_4_BIT_DATA;
|
|
break;
|
|
case 1:
|
|
break;
|
|
default:
|
|
dev_err(host->hw_dev,
|
|
"Invalid \"bus-width\" value %ud!\n", bus_width);
|
|
}
|
|
|
|
/* f_max is obtained from the optional "max-frequency" property */
|
|
of_property_read_u32(np, "max-frequency", &host->f_max);
|
|
}
|