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at91sam9263ek.c

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  • Forked from Reform / reform-boundary-uboot
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    sdhci.c 12.50 KiB
    /*
     * Copyright 2011, Marvell Semiconductor Inc.
     * Lei Wen <leiwen@marvell.com>
     *
     * See file CREDITS for list of people who contributed to this
     * 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.
     *
     * 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., 59 Temple Place, Suite 330, Boston,
     * MA 02111-1307 USA
     *
     * Back ported to the 8xx platform (from the 8260 platform) by
     * Murray.Jensen@cmst.csiro.au, 27-Jan-01.
     */
    
    #include <common.h>
    #include <malloc.h>
    #include <mmc.h>
    #include <sdhci.h>
    
    void *aligned_buffer;
    
    static void sdhci_reset(struct sdhci_host *host, u8 mask)
    {
    	unsigned long timeout;
    
    	/* Wait max 100 ms */
    	timeout = 100;
    	sdhci_writeb(host, mask, SDHCI_SOFTWARE_RESET);
    	while (sdhci_readb(host, SDHCI_SOFTWARE_RESET) & mask) {
    		if (timeout == 0) {
    			printf("Reset 0x%x never completed.\n", (int)mask);
    			return;
    		}
    		timeout--;
    		udelay(1000);
    	}
    }
    
    static void sdhci_cmd_done(struct sdhci_host *host, struct mmc_cmd *cmd)
    {
    	int i;
    	if (cmd->resp_type & MMC_RSP_136) {
    		/* CRC is stripped so we need to do some shifting. */
    		for (i = 0; i < 4; i++) {
    			cmd->response[i] = sdhci_readl(host,
    					SDHCI_RESPONSE + (3-i)*4) << 8;
    			if (i != 3)
    				cmd->response[i] |= sdhci_readb(host,
    						SDHCI_RESPONSE + (3-i)*4-1);
    		}
    	} else {
    		cmd->response[0] = sdhci_readl(host, SDHCI_RESPONSE);
    	}
    }
    
    static void sdhci_transfer_pio(struct sdhci_host *host, struct mmc_data *data)
    {
    	int i;