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Add support for the Freescale eSDHC found on 8379 and 8536 SoCs

Browse source 
This uses the new MMC framework

Some contributions by Dave Liu <daveliu@freescale.com>

Signed-off-by: Andy Fleming <afleming@freescale.com>
This commit is contained in:
Andy Fleming 2008-10-30 16:47:16 -05:00
parent 272cc70b21
commit 50586ef24e
3 changed files with 494 additions and 0 deletions
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1
drivers/mmc/Makefile
View file

@ -29,6 +29,7 @@ COBJS-$(CONFIG_GENERIC_MMC) += mmc.o
COBJS-$(CONFIG_ATMEL_MCI) += atmel_mci.o
COBJS-$(CONFIG_BFIN_SDH) += bfin_sdh.o
COBJS-$(CONFIG_OMAP3_MMC) += omap3_mmc.o
COBJS-$(CONFIG_FSL_ESDHC) += fsl_esdhc.o
COBJS := $(COBJS-y)
SRCS := $(COBJS:.o=.c)

348
drivers/mmc/fsl_esdhc.c Normal file
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@ -0,0 +1,348 @@
/*
* Copyright 2007, Freescale Semiconductor, Inc
* Andy Fleming
*
* Based vaguely on the pxa mmc code:
* (C) Copyright 2003
* Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
*
* 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
*/
#include <config.h>
#include <common.h>
#include <command.h>
#include <mmc.h>
#include <part.h>
#include <malloc.h>
#include <mmc.h>
#include <fsl_esdhc.h>
#include <asm/io.h>
DECLARE_GLOBAL_DATA_PTR;
struct fsl_esdhc {
uint dsaddr;
uint blkattr;
uint cmdarg;
uint xfertyp;
uint cmdrsp0;
uint cmdrsp1;
uint cmdrsp2;
uint cmdrsp3;
uint datport;
uint prsstat;
uint proctl;
uint sysctl;
uint irqstat;
uint irqstaten;
uint irqsigen;
uint autoc12err;
uint hostcapblt;
uint wml;
char reserved1[8];
uint fevt;
char reserved2[168];
uint hostver;
char reserved3[780];
uint scr;
};
/* Return the XFERTYP flags for a given command and data packet */
uint esdhc_xfertyp(struct mmc_cmd *cmd, struct mmc_data *data)
{
uint xfertyp = 0;
if (data) {
xfertyp |= XFERTYP_DPSEL | XFERTYP_DMAEN;
if (data->blocks > 1) {
xfertyp |= XFERTYP_MSBSEL;
xfertyp |= XFERTYP_BCEN;
}
if (data->flags & MMC_DATA_READ)
xfertyp |= XFERTYP_DTDSEL;
}
if (cmd->resp_type & MMC_RSP_CRC)
xfertyp |= XFERTYP_CCCEN;
if (cmd->resp_type & MMC_RSP_OPCODE)
xfertyp |= XFERTYP_CICEN;
if (cmd->resp_type & MMC_RSP_136)
xfertyp |= XFERTYP_RSPTYP_136;
else if (cmd->resp_type & MMC_RSP_BUSY)
xfertyp |= XFERTYP_RSPTYP_48_BUSY;
else if (cmd->resp_type & MMC_RSP_PRESENT)
xfertyp |= XFERTYP_RSPTYP_48;
return XFERTYP_CMD(cmd->cmdidx) | xfertyp;
}
static int esdhc_setup_data(struct mmc *mmc, struct mmc_data *data)
{
uint wml_value;
int timeout;
struct fsl_esdhc *regs = mmc->priv;
wml_value = data->blocksize/4;
if (data->flags & MMC_DATA_READ) {
if (wml_value > 0x10)
wml_value = 0x10;
wml_value = 0x100000 | wml_value;
out_be32(&regs->dsaddr, (u32)data->dest);
} else {
if (wml_value > 0x80)
wml_value = 0x80;
if ((in_be32(&regs->prsstat) & PRSSTAT_WPSPL) == 0) {
printf("\nThe SD card is locked. Can not write to a locked card.\n\n");
return TIMEOUT;
}
wml_value = wml_value << 16 | 0x10;
out_be32(&regs->dsaddr, (u32)data->src);
}
out_be32(&regs->wml, wml_value);
out_be32(&regs->blkattr, data->blocks << 16 | data->blocksize);
/* Calculate the timeout period for data transactions */
timeout = __ilog2(mmc->tran_speed/10);
timeout -= 13;
if (timeout > 14)
timeout = 14;
if (timeout < 0)
timeout = 0;
clrsetbits_be32(&regs->sysctl, SYSCTL_TIMEOUT_MASK, timeout << 16);
return 0;
}
/*
* Sends a command out on the bus. Takes the mmc pointer,
* a command pointer, and an optional data pointer.
*/
static int
esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
{
uint xfertyp;
uint irqstat;
volatile struct fsl_esdhc *regs = mmc->priv;
out_be32(&regs->irqstat, -1);
sync();
/* Wait for the bus to be idle */
while ((in_be32(&regs->prsstat) & PRSSTAT_CICHB) ||
(in_be32(&regs->prsstat) & PRSSTAT_CIDHB));
while (in_be32(&regs->prsstat) & PRSSTAT_DLA);
/* Wait at least 8 SD clock cycles before the next command */
/*
* Note: This is way more than 8 cycles, but 1ms seems to
* resolve timing issues with some cards
*/
udelay(1000);
/* Set up for a data transfer if we have one */
if (data) {
int err;
err = esdhc_setup_data(mmc, data);
if(err)
return err;
}
/* Figure out the transfer arguments */
xfertyp = esdhc_xfertyp(cmd, data);
/* Send the command */
out_be32(&regs->cmdarg, cmd->cmdarg);
out_be32(&regs->xfertyp, xfertyp);
/* Wait for the command to complete */
while (!(in_be32(&regs->irqstat) & IRQSTAT_CC));
irqstat = in_be32(&regs->irqstat);
out_be32(&regs->irqstat, irqstat);
if (irqstat & CMD_ERR)
return COMM_ERR;
if (irqstat & IRQSTAT_CTOE)
return TIMEOUT;
/* Copy the response to the response buffer */
if (cmd->resp_type & MMC_RSP_136) {
u32 cmdrsp3, cmdrsp2, cmdrsp1, cmdrsp0;
cmdrsp3 = in_be32(&regs->cmdrsp3);
cmdrsp2 = in_be32(&regs->cmdrsp2);
cmdrsp1 = in_be32(&regs->cmdrsp1);
cmdrsp0 = in_be32(&regs->cmdrsp0);
((uint *)(cmd->response))[0] = (cmdrsp3 << 8) | (cmdrsp2 >> 24);
((uint *)(cmd->response))[1] = (cmdrsp2 << 8) | (cmdrsp1 >> 24);
((uint *)(cmd->response))[2] = (cmdrsp1 << 8) | (cmdrsp0 >> 24);
((uint *)(cmd->response))[3] = (cmdrsp0 << 8);
} else
((uint *)(cmd->response))[0] = in_be32(&regs->cmdrsp0);
/* Wait until all of the blocks are transferred */
if (data) {
do {
irqstat = in_be32(&regs->irqstat);
if (irqstat & DATA_ERR)
return COMM_ERR;
if (irqstat & IRQSTAT_DTOE)
return TIMEOUT;
} while (!(irqstat & IRQSTAT_TC) &&
(in_be32(&regs->prsstat) & PRSSTAT_DLA));
}
out_be32(&regs->irqstat, -1);
return 0;
}
void set_sysctl(struct mmc *mmc, uint clock)
{
int sdhc_clk = gd->sdhc_clk;
int div, pre_div;
volatile struct fsl_esdhc *regs = mmc->priv;
uint clk;
if (sdhc_clk / 16 > clock) {
for (pre_div = 2; pre_div < 256; pre_div *= 2)
if ((sdhc_clk / pre_div) <= (clock * 16))
break;
} else
pre_div = 2;
for (div = 1; div <= 16; div++)
if ((sdhc_clk / (div * pre_div)) <= clock)
break;
pre_div >>= 1;
div -= 1;
clk = (pre_div << 8) | (div << 4);
clrsetbits_be32(&regs->sysctl, SYSCTL_CLOCK_MASK, clk);
udelay(10000);
setbits_be32(&regs->sysctl, SYSCTL_PEREN);
}
static void esdhc_set_ios(struct mmc *mmc)
{
struct fsl_esdhc *regs = mmc->priv;
/* Set the clock speed */
set_sysctl(mmc, mmc->clock);
/* Set the bus width */
clrbits_be32(&regs->proctl, PROCTL_DTW_4 | PROCTL_DTW_8);
if (mmc->bus_width == 4)
setbits_be32(&regs->proctl, PROCTL_DTW_4);
else if (mmc->bus_width == 8)
setbits_be32(&regs->proctl, PROCTL_DTW_8);
}
static int esdhc_init(struct mmc *mmc)
{
struct fsl_esdhc *regs = mmc->priv;
int timeout = 1000;
/* Enable cache snooping */
out_be32(&regs->scr, 0x00000040);
out_be32(&regs->sysctl, SYSCTL_HCKEN | SYSCTL_IPGEN);
/* Set the initial clock speed */
set_sysctl(mmc, 400000);
/* Disable the BRR and BWR bits in IRQSTAT */
clrbits_be32(&regs->irqstaten, IRQSTATEN_BRR | IRQSTATEN_BWR);
/* Put the PROCTL reg back to the default */
out_be32(&regs->proctl, PROCTL_INIT);
while (!(in_be32(&regs->prsstat) & PRSSTAT_CINS) && --timeout)
udelay(1000);
if (timeout <= 0)
return NO_CARD_ERR;
return 0;
}
static int esdhc_initialize(bd_t *bis)
{
struct fsl_esdhc *regs = (struct fsl_esdhc *)CONFIG_SYS_FSL_ESDHC_ADDR;
struct mmc *mmc;
u32 caps;
mmc = malloc(sizeof(struct mmc));
sprintf(mmc->name, "FSL_ESDHC");
mmc->priv = regs;
mmc->send_cmd = esdhc_send_cmd;
mmc->set_ios = esdhc_set_ios;
mmc->init = esdhc_init;
caps = regs->hostcapblt;
if (caps & ESDHC_HOSTCAPBLT_VS18)
mmc->voltages |= MMC_VDD_165_195;
if (caps & ESDHC_HOSTCAPBLT_VS30)
mmc->voltages |= MMC_VDD_29_30 | MMC_VDD_30_31;
if (caps & ESDHC_HOSTCAPBLT_VS33)
mmc->voltages |= MMC_VDD_32_33 | MMC_VDD_33_34;
mmc->host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT;
if (caps & ESDHC_HOSTCAPBLT_HSS)
mmc->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
mmc->f_min = 400000;
mmc->f_max = MIN(gd->sdhc_clk, 50000000);
mmc_register(mmc);
return 0;
}
int fsl_esdhc_mmc_init(bd_t *bis)
{
return esdhc_initialize(bis);
}

145
include/fsl_esdhc.h Normal file
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@ -0,0 +1,145 @@
/*
* FSL SD/MMC Defines
*-------------------------------------------------------------------
*
* Copyright 2007-2008, Freescale Semiconductor, Inc
*
* 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
*
*-------------------------------------------------------------------
*
*/
#ifndef __FSL_ESDHC_H__
#define __FSL_ESDHC_H__
/* FSL eSDHC-specific constants */
#define SYSCTL 0x0002e02c
#define SYSCTL_INITA 0x08000000
#define SYSCTL_TIMEOUT_MASK 0x000f0000
#define SYSCTL_CLOCK_MASK 0x00000fff
#define SYSCTL_PEREN 0x00000004
#define SYSCTL_HCKEN 0x00000002
#define SYSCTL_IPGEN 0x00000001
#define IRQSTAT 0x0002e030
#define IRQSTAT_DMAE (0x10000000)
#define IRQSTAT_AC12E (0x01000000)
#define IRQSTAT_DEBE (0x00400000)
#define IRQSTAT_DCE (0x00200000)
#define IRQSTAT_DTOE (0x00100000)
#define IRQSTAT_CIE (0x00080000)
#define IRQSTAT_CEBE (0x00040000)
#define IRQSTAT_CCE (0x00020000)
#define IRQSTAT_CTOE (0x00010000)
#define IRQSTAT_CINT (0x00000100)
#define IRQSTAT_CRM (0x00000080)
#define IRQSTAT_CINS (0x00000040)
#define IRQSTAT_BRR (0x00000020)
#define IRQSTAT_BWR (0x00000010)
#define IRQSTAT_DINT (0x00000008)
#define IRQSTAT_BGE (0x00000004)
#define IRQSTAT_TC (0x00000002)
#define IRQSTAT_CC (0x00000001)
#define CMD_ERR (IRQSTAT_CIE | IRQSTAT_CEBE | IRQSTAT_CCE)
#define DATA_ERR (IRQSTAT_DEBE | IRQSTAT_DCE | IRQSTAT_DTOE)
#define IRQSTATEN 0x0002e034
#define IRQSTATEN_DMAE (0x10000000)
#define IRQSTATEN_AC12E (0x01000000)
#define IRQSTATEN_DEBE (0x00400000)
#define IRQSTATEN_DCE (0x00200000)
#define IRQSTATEN_DTOE (0x00100000)
#define IRQSTATEN_CIE (0x00080000)
#define IRQSTATEN_CEBE (0x00040000)
#define IRQSTATEN_CCE (0x00020000)
#define IRQSTATEN_CTOE (0x00010000)
#define IRQSTATEN_CINT (0x00000100)
#define IRQSTATEN_CRM (0x00000080)
#define IRQSTATEN_CINS (0x00000040)
#define IRQSTATEN_BRR (0x00000020)
#define IRQSTATEN_BWR (0x00000010)
#define IRQSTATEN_DINT (0x00000008)
#define IRQSTATEN_BGE (0x00000004)
#define IRQSTATEN_TC (0x00000002)
#define IRQSTATEN_CC (0x00000001)
#define PRSSTAT 0x0002e024
#define PRSSTAT_CLSL (0x00800000)
#define PRSSTAT_WPSPL (0x00080000)
#define PRSSTAT_CDPL (0x00040000)
#define PRSSTAT_CINS (0x00010000)
#define PRSSTAT_BREN (0x00000800)
#define PRSSTAT_DLA (0x00000004)
#define PRSSTAT_CICHB (0x00000002)
#define PRSSTAT_CIDHB (0x00000001)
#define PROCTL 0x0002e028
#define PROCTL_INIT 0x00000020
#define PROCTL_DTW_4 0x00000002
#define PROCTL_DTW_8 0x00000004
#define CMDARG 0x0002e008
#define XFERTYP 0x0002e00c
#define XFERTYP_CMD(x) ((x & 0x3f) << 24)
#define XFERTYP_CMDTYP_NORMAL 0x0
#define XFERTYP_CMDTYP_SUSPEND 0x00400000
#define XFERTYP_CMDTYP_RESUME 0x00800000
#define XFERTYP_CMDTYP_ABORT 0x00c00000
#define XFERTYP_DPSEL 0x00200000
#define XFERTYP_CICEN 0x00100000
#define XFERTYP_CCCEN 0x00080000
#define XFERTYP_RSPTYP_NONE 0
#define XFERTYP_RSPTYP_136 0x00010000
#define XFERTYP_RSPTYP_48 0x00020000
#define XFERTYP_RSPTYP_48_BUSY 0x00030000
#define XFERTYP_MSBSEL 0x00000020
#define XFERTYP_DTDSEL 0x00000010
#define XFERTYP_AC12EN 0x00000004
#define XFERTYP_BCEN 0x00000002
#define XFERTYP_DMAEN 0x00000001
#define CINS_TIMEOUT 1000
#define DSADDR 0x2e004
#define CMDRSP0 0x2e010
#define CMDRSP1 0x2e014
#define CMDRSP2 0x2e018
#define CMDRSP3 0x2e01c
#define DATPORT 0x2e020
#define WML 0x2e044
#define WML_WRITE 0x00010000
#define BLKATTR 0x2e004
#define BLKATTR_CNT(x) ((x & 0xffff) << 16)
#define BLKATTR_SIZE(x) (x & 0x1fff)
#define MAX_BLK_CNT 0x7fff /* so malloc will have enough room with 32M */
#define ESDHC_HOSTCAPBLT_VS18 0x04000000
#define ESDHC_HOSTCAPBLT_VS30 0x02000000
#define ESDHC_HOSTCAPBLT_VS33 0x01000000
#define ESDHC_HOSTCAPBLT_SRS 0x00800000
#define ESDHC_HOSTCAPBLT_DMAS 0x00400000
#define ESDHC_HOSTCAPBLT_HSS 0x00200000
int fsl_esdhc_mmc_init(bd_t *bis);
#endif /* __FSL_ESDHC_H__ */