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openwrt-xburst/target/linux/coldfire/patches/028-Add-SD-MMC-SDIO-over-SPI-support-for-MCF54451-and-MC.patch
kaloz 7e7649baa9 [coldfire]: switch to 2.6.38 
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31546 3c298f89-4303-0410-b956-a3cf2f4a3e73
2012-05-01 07:00:17 +00:00

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From d1b6aa1480c937e326bef99746299cd004a51f28 Mon Sep 17 00:00:00 2001
From: Alison Wang <b18965@freescale.com>
Date: Thu, 4 Aug 2011 09:59:46 +0800
Subject: [PATCH 28/52] Add SD/MMC/SDIO over SPI support for MCF54451 and MCF54418
Add SD/MMC/SDIO over SPI support for MCF54451 and MCF54418.
Signed-off-by: Alison Wang <b18965@freescale.com>
---
drivers/mmc/core/sdio.c | 9 +++++-
drivers/mmc/host/Kconfig | 35 +++++++++++++++++++++
drivers/mmc/host/mmc_spi.c | 73 ++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 116 insertions(+), 1 deletions(-)
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -566,8 +566,15 @@ static void mmc_sdio_detect(struct mmc_h
/*
* Just check if our card has been removed.
*/
+#if defined(M54451_SD_HW_DETECT)
+ {
+ unsigned char x;
+ err = mmc_io_rw_direct(host->card, 0, 0,
+ SDIO_FBR_BASE(0) + SDIO_FBR_CIS + 0, 0, &x);
+ }
+#else
err = mmc_select_card(host->card);
-
+#endif
mmc_release_host(host);
/*
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -368,6 +368,41 @@ config MMC_SPI
If unsure, or if your system has no SPI master driver, say N.
+config M54451_SD_HW_DETECT
+ tristate "use extern IRQ7 to detect SD/MMC card"
+ depends on MMC_SPI && M54451
+ default y
+ help
+ MMC/SD interface on 54551evb was over SPI. Enable this option will
+ use irq7 to dectect the card inserting/removing.
+
+config M5441X_SD_HW_DETECT
+ tristate "use extern IRQ to detect SD/MMC card"
+ depends on MMC_SPI && M5441X
+ help
+ MMC/SD interface on 54418evb was over SPI. Enable this option will
+ use irq7 or irq1 to dectect the card inserting/removing.
+
+choice
+ prompt "MMC/SD card detect "
+ depends on M5441X_SD_HW_DETECT
+
+config DETECT_USE_EXTERN_IRQ7
+ tristate "based extern IRQ7"
+ depends on M5441X_SD_HW_DETECT
+ help
+ MMC/SD cards using spi controller,
+ we use the extern irq7 to detect card.
+
+config DETECT_USE_EXTERN_IRQ1
+ tristate "based extern IRQ1"
+ depends on M5441X_SD_HW_DETECT
+ help
+ MMC/SD cards using spi controller,
+ we use the extern irq1 to detect card.
+
+endchoice
+
config MMC_S3C
tristate "Samsung S3C SD/MMC Card Interface support"
depends on ARCH_S3C2410
--- a/drivers/mmc/host/mmc_spi.c
+++ b/drivers/mmc/host/mmc_spi.c
@@ -9,6 +9,10 @@
* (C) Copyright 2007, ATRON electronic GmbH,
* Jan Nikitenko <jan.nikitenko@gmail.com>
*
+ * Copyright (C) 2009-2011 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Modified for M54451EVB/M54418TWR boards.
+ * Shrek Wu <b16972@freescale.com>
+ * Jingchang Lu <b22599@freescale.com>
*
* 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
@@ -32,6 +36,14 @@
#include <linux/crc7.h>
#include <linux/crc-itu-t.h>
#include <linux/scatterlist.h>
+#if defined(CONFIG_M54451_SD_HW_DETECT)
+#include <asm/mcf5445x_eport.h>
+#include <asm/mcf5445x_intc.h>
+#include <asm/mcfsim.h>
+#elif defined(CONFIG_M5441X_SD_HW_DETECT)
+#include <asm/mcf5441x_eport.h>
+#include <asm/mcfsim.h>
+#endif
#include <linux/mmc/host.h>
#include <linux/mmc/mmc.h> /* for R1_SPI_* bit values */
@@ -268,6 +280,9 @@ static int mmc_spi_response_get(struct m
unsigned short rotator;
int i;
char tag[32];
+#if defined(CONFIG_M54451_SD_HW_DETECT) || defined(CONFIG_M5441X_SD_HW_DETECT)
+ u8 oldcp_value = 0;
+#endif
snprintf(tag, sizeof(tag), " ... CMD%d response SPI_%s",
cmd->opcode, maptype(cmd));
@@ -278,6 +293,9 @@ static int mmc_spi_response_get(struct m
* first byte. After STOP_TRANSMISSION command it may include
* two data bits, but otherwise it's all ones.
*/
+#if defined(CONFIG_M54451_SD_HW_DETECT) || defined(CONFIG_M5441X_SD_HW_DETECT)
+ oldcp_value = *cp;
+#endif
cp += 8;
while (cp < end && *cp == 0xff)
cp++;
@@ -310,6 +328,15 @@ static int mmc_spi_response_get(struct m
}
checkstatus:
+#if defined(CONFIG_M54451_SD_HW_DETECT) || defined(CONFIG_M5441X_SD_HW_DETECT)
+ if ((*cp == 0) && (oldcp_value == 0)) {
+ dev_dbg(&host->spi->dev, "NO CARD in the SD SOCKET, "
+ "new status %02x, old status %02x\n",
+ *cp, oldcp_value);
+ value = -EBADR;
+ goto done;
+ }
+#endif
bitshift = 0;
if (*cp & 0x80) {
/* Houston, we have an ugly card with a bit-shifted response */
@@ -1313,7 +1340,53 @@ mmc_spi_detect_irq(int irq, void *mmc)
struct mmc_spi_host *host = mmc_priv(mmc);
u16 delay_msec = max(host->pdata->detect_delay, (u16)100);
+#if defined(CONFIG_M54451_SD_HW_DETECT)
+ dev_dbg(&host->spi->dev, "mmc_spi_detect_irq "
+ "MCF_EPORT_EPPAR %x, MCF_EPORT_EPIER %x,"
+ "MCF_INTC0_ICR7 %x, MCF_GPIO_PAR_IRQ %x,"
+ "MCF_EPORT_EPDDR %x, MCF_EPORT_EPFR %x\n",
+ MCF_EPORT_EPPAR, MCF_EPORT_EPIER,
+ MCF_INTC0_ICR7, MCF_GPIO_PAR_IRQ,
+ MCF_EPORT_EPDDR, MCF_EPORT_EPFR);
+
+ MCF_EPORT_EPIER &= (~MCF_EPORT_EPIER_EPIE7);
+#elif defined(CONFIG_M5441X_SD_HW_DETECT)
+#if defined(CONFIG_DETECT_USE_EXTERN_IRQ1)
+ MCF_EPORT_EPIER = MCF_EPORT_EPIER & (~MCF_EPORT_EPIER_EPIE1);
+#elif defined(CONFIG_DETECT_USE_EXTERN_IRQ7)
+ MCF_EPORT_EPIER = MCF_EPORT_EPIER & (~MCF_EPORT_EPIER_EPIE7);
+#else
+ MCF_EPORT_EPIER = MCF_EPORT_EPIER & (~MCF_EPORT_EPIER_EPIE7);
+#endif
+#endif
mmc_detect_change(mmc, msecs_to_jiffies(delay_msec));
+#if defined(CONFIG_M54451_SD_HW_DETECT)
+ MCF_EPORT_EPPAR |= MCF_EPORT_EPPAR_EPPA7_BOTH;
+ MCF_EPORT_EPIER = MCF_EPORT_EPIER | MCF_EPORT_EPIER_EPIE7;
+ MCF_EPORT_EPFR |= MCF_EPORT_EPFR_EPF7;
+ dev_dbg(&host->spi->dev, "mmc_spi_detect_irq "
+ "MCF_EPORT_EPPAR %x, MCF_EPORT_EPIER %x,"
+ "MCF_INTC0_ICR7 %x, MCF_GPIO_PAR_IRQ %x,"
+ "MCF_EPORT_EPDDR %x, MCF_EPORT_EPFR %x\n",
+ MCF_EPORT_EPPAR, MCF_EPORT_EPIER,
+ MCF_INTC0_ICR7, MCF_GPIO_PAR_IRQ,
+ MCF_EPORT_EPDDR, MCF_EPORT_EPFR);
+
+#elif defined(CONFIG_M5441X_SD_HW_DETECT)
+#if defined(CONFIG_DETECT_USE_EXTERN_IRQ1)
+ MCF_EPORT_EPPAR = MCF_EPORT_EPPAR | MCF_EPORT_EPPAR_EPPA1_BOTH;
+ MCF_EPORT_EPIER = MCF_EPORT_EPIER | MCF_EPORT_EPIER_EPIE1;
+ MCF_EPORT_EPFR = MCF_EPORT_EPFR | MCF_EPORT_EPFR_EPF1;
+#elif defined(CONFIG_DETECT_USE_EXTERN_IRQ7)
+ MCF_EPORT_EPPAR = MCF_EPORT_EPPAR | MCF_EPORT_EPPAR_EPPA7_BOTH;
+ MCF_EPORT_EPIER = MCF_EPORT_EPIER | MCF_EPORT_EPIER_EPIE7;
+ MCF_EPORT_EPFR = MCF_EPORT_EPFR | MCF_EPORT_EPFR_EPF7;
+#else
+ MCF_EPORT_EPPAR = MCF_EPORT_EPPAR | MCF_EPORT_EPPAR_EPPA7_BOTH;
+ MCF_EPORT_EPIER = MCF_EPORT_EPIER | MCF_EPORT_EPIER_EPIE7;
+ MCF_EPORT_EPFR = MCF_EPORT_EPFR | MCF_EPORT_EPFR_EPF7;
+#endif
+#endif
return IRQ_HANDLED;
}
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