86 lines
1.7 KiB
C
86 lines
1.7 KiB
C
/*
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* linux/drivers/mmc/sdio_ops.c
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*
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* Copyright 2006-2007 Pierre Ossman
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*/
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#include <linux/mmc/host.h>
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#include <linux/mmc/card.h>
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#include <linux/mmc/mmc.h>
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#include <linux/mmc/sdio.h>
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#include "core.h"
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int mmc_send_io_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
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{
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struct mmc_command cmd;
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int i, err = 0;
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BUG_ON(!host);
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memset(&cmd, 0, sizeof(struct mmc_command));
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cmd.opcode = SD_IO_SEND_OP_COND;
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cmd.arg = ocr;
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cmd.flags = MMC_RSP_R4 | MMC_CMD_BCR;
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for (i = 100; i; i--) {
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err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
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if (err)
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break;
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if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0)
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break;
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err = -ETIMEDOUT;
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mmc_delay(10);
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}
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if (rocr)
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*rocr = cmd.resp[0];
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return err;
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}
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int mmc_io_rw_direct(struct mmc_card *card, int write, unsigned fn,
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unsigned addr, u8 in, u8* out)
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{
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struct mmc_command cmd;
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int err;
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BUG_ON(!card);
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BUG_ON(fn > 7);
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memset(&cmd, 0, sizeof(struct mmc_command));
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cmd.opcode = SD_IO_RW_DIRECT;
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cmd.arg = write ? 0x80000000 : 0x00000000;
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cmd.arg |= fn << 28;
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cmd.arg |= (write && out) ? 0x08000000 : 0x00000000;
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cmd.arg |= addr << 9;
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cmd.arg |= in;
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cmd.flags = MMC_RSP_R5 | MMC_CMD_AC;
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err = mmc_wait_for_cmd(card->host, &cmd, 0);
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if (err)
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return err;
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if (cmd.resp[0] & R5_ERROR)
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return -EIO;
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if (cmd.resp[0] & R5_FUNCTION_NUMBER)
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return -EINVAL;
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if (cmd.resp[0] & R5_OUT_OF_RANGE)
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return -ERANGE;
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if (out)
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*out = cmd.resp[0] & 0xFF;
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return 0;
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}
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