[PATCH v7] mmc: moxart: Add MOXA ART SD/MMC driver
Add SD/MMC driver for MOXA ART SoCs.
Signed-off-by: Jonas Jensen
---
Notes:
v6 was supposed to fix a panic from dmaengine_tx_status() but it
still happened. This is the sort of panic that lasts between reboots
but not between kernel reflash.
dmaengine_tx_status() is used only to print DMA error, that's why
I decided to remove it, instead of risking permanent kernel panic.
Changes since v6:
1. use mmc_of_parse()
2. remove duplicate defines MSD_*
3. add reference to bindings/mmc/mmc.txt in DT binding
4. update DT binding example
("coreclk" renamed "clk_apb", DMA channel number is no longer needed)
5. rename "sdhci-moxart" "moxart-mmc"
6. remove dmaengine_tx_status() / don't print DMA error
7. format comments / use correct grammar
Applies to next-20140121
.../devicetree/bindings/mmc/moxa,moxart-mmc.txt| 32 +
drivers/mmc/host/Kconfig | 9 +
drivers/mmc/host/Makefile | 1 +
drivers/mmc/host/moxart-mmc.c | 872 +
4 files changed, 914 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mmc/moxa,moxart-mmc.txt
create mode 100644 drivers/mmc/host/moxart-mmc.c
diff --git a/Documentation/devicetree/bindings/mmc/moxa,moxart-mmc.txt
b/Documentation/devicetree/bindings/mmc/moxa,moxart-mmc.txt
new file mode 100644
index 000..c2045d1
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/moxa,moxart-mmc.txt
@@ -0,0 +1,32 @@
+MOXA ART SD Host Controller Interface
+
+ Inherits from mmc binding[1].
+
+ [1] Documentation/devicetree/bindings/mmc/mmc.txt
+
+Required properties:
+
+- compatible : Must be "moxa,moxart-mmc"
+- reg :Should contain registers location and length
+- interrupts : Should contain the interrupt number
+- clocks : Should contain phandle for the clock feeding the SDHCI
controller
+
+Optional properties:
+
+These are optional but required to enable DMA transfer mode:
+
+- dmas : Should contain two DMA channels, line request number must be 5
for
+ both channels
+- dma-names : Must be "tx", "rx"
+
+Example:
+
+ mmc: mmc@98e0 {
+ compatible = "moxa,moxart-mmc";
+ reg = <0x98e0 0x5C>;
+ interrupts = <5 0>;
+ clocks = <_apb>;
+ dmas = < 5>,
+ < 5>;
+ dma-names = "tx", "rx";
+ };
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 1384f67..15806d6 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -283,6 +283,15 @@ config MMC_SDHCI_BCM2835
If unsure, say N.
+config MMC_MOXART
+ tristate "MOXART SD/MMC Host Controller support"
+ depends on ARCH_MOXART && MMC
+ help
+ This selects support for the MOXART SD/MMC Host Controller.
+ MOXA provides one multi-functional card reader which can
+ be found on some embedded hardware such as UC-7112-LX.
+ If you have a controller with this interface, say Y here.
+
config MMC_OMAP
tristate "TI OMAP Multimedia Card Interface support"
depends on ARCH_OMAP
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index 3483b6b..6b90eda 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -51,6 +51,7 @@ obj-$(CONFIG_MMC_JZ4740) += jz4740_mmc.o
obj-$(CONFIG_MMC_VUB300) += vub300.o
obj-$(CONFIG_MMC_USHC) += ushc.o
obj-$(CONFIG_MMC_WMT) += wmt-sdmmc.o
+obj-$(CONFIG_MMC_MOXART) += moxart-mmc.o
obj-$(CONFIG_MMC_REALTEK_PCI) += rtsx_pci_sdmmc.o
diff --git a/drivers/mmc/host/moxart-mmc.c b/drivers/mmc/host/moxart-mmc.c
new file mode 100644
index 000..be12e12
--- /dev/null
+++ b/drivers/mmc/host/moxart-mmc.c
@@ -0,0 +1,872 @@
+/*
+ * MOXA ART MMC host driver.
+ *
+ * Copyright (C) 2013 Jonas Jensen
+ *
+ * Jonas Jensen
+ *
+ * Based on code from
+ * Moxa Technologies Co., Ltd.
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+
+#include
+#include
+
+#define MMC_RSP_SHORT 1
+#define MMC_RSP_LONG 2
+#define MMC_RSP_MASK 3
+#define MMC_ERR_NONE 0
+#define MMC_ERR_TIMEOUT1
+#define MMC_MODE_MMC 0
+#define MMC_MODE_SD1
+#define MMC_ERR_BADCRC 2
+#define MMC_VDD_36023
+
+#define MSD_RETRY_COUNT10
+
+#define REG_COMMAND0
+#define REG_ARGUMENT 4
+#define REG_RESPONSE0 8
+#define
[PATCH v7] mmc: moxart: Add MOXA ART SD/MMC driver
Add SD/MMC driver for MOXA ART SoCs.
Signed-off-by: Jonas Jensen jonas.jen...@gmail.com
---
Notes:
v6 was supposed to fix a panic from dmaengine_tx_status() but it
still happened. This is the sort of panic that lasts between reboots
but not between kernel reflash.
dmaengine_tx_status() is used only to print DMA error, that's why
I decided to remove it, instead of risking permanent kernel panic.
Changes since v6:
1. use mmc_of_parse()
2. remove duplicate defines MSD_*
3. add reference to bindings/mmc/mmc.txt in DT binding
4. update DT binding example
(coreclk renamed clk_apb, DMA channel number is no longer needed)
5. rename sdhci-moxart moxart-mmc
6. remove dmaengine_tx_status() / don't print DMA error
7. format comments / use correct grammar
Applies to next-20140121
.../devicetree/bindings/mmc/moxa,moxart-mmc.txt| 32 +
drivers/mmc/host/Kconfig | 9 +
drivers/mmc/host/Makefile | 1 +
drivers/mmc/host/moxart-mmc.c | 872 +
4 files changed, 914 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mmc/moxa,moxart-mmc.txt
create mode 100644 drivers/mmc/host/moxart-mmc.c
diff --git a/Documentation/devicetree/bindings/mmc/moxa,moxart-mmc.txt
b/Documentation/devicetree/bindings/mmc/moxa,moxart-mmc.txt
new file mode 100644
index 000..c2045d1
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/moxa,moxart-mmc.txt
@@ -0,0 +1,32 @@
+MOXA ART SD Host Controller Interface
+
+ Inherits from mmc binding[1].
+
+ [1] Documentation/devicetree/bindings/mmc/mmc.txt
+
+Required properties:
+
+- compatible : Must be moxa,moxart-mmc
+- reg :Should contain registers location and length
+- interrupts : Should contain the interrupt number
+- clocks : Should contain phandle for the clock feeding the SDHCI
controller
+
+Optional properties:
+
+These are optional but required to enable DMA transfer mode:
+
+- dmas : Should contain two DMA channels, line request number must be 5
for
+ both channels
+- dma-names : Must be tx, rx
+
+Example:
+
+ mmc: mmc@98e0 {
+ compatible = moxa,moxart-mmc;
+ reg = 0x98e0 0x5C;
+ interrupts = 5 0;
+ clocks = clk_apb;
+ dmas = dma 5,
+ dma 5;
+ dma-names = tx, rx;
+ };
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 1384f67..15806d6 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -283,6 +283,15 @@ config MMC_SDHCI_BCM2835
If unsure, say N.
+config MMC_MOXART
+ tristate MOXART SD/MMC Host Controller support
+ depends on ARCH_MOXART MMC
+ help
+ This selects support for the MOXART SD/MMC Host Controller.
+ MOXA provides one multi-functional card reader which can
+ be found on some embedded hardware such as UC-7112-LX.
+ If you have a controller with this interface, say Y here.
+
config MMC_OMAP
tristate TI OMAP Multimedia Card Interface support
depends on ARCH_OMAP
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index 3483b6b..6b90eda 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -51,6 +51,7 @@ obj-$(CONFIG_MMC_JZ4740) += jz4740_mmc.o
obj-$(CONFIG_MMC_VUB300) += vub300.o
obj-$(CONFIG_MMC_USHC) += ushc.o
obj-$(CONFIG_MMC_WMT) += wmt-sdmmc.o
+obj-$(CONFIG_MMC_MOXART) += moxart-mmc.o
obj-$(CONFIG_MMC_REALTEK_PCI) += rtsx_pci_sdmmc.o
diff --git a/drivers/mmc/host/moxart-mmc.c b/drivers/mmc/host/moxart-mmc.c
new file mode 100644
index 000..be12e12
--- /dev/null
+++ b/drivers/mmc/host/moxart-mmc.c
@@ -0,0 +1,872 @@
+/*
+ * MOXA ART MMC host driver.
+ *
+ * Copyright (C) 2013 Jonas Jensen
+ *
+ * Jonas Jensen jonas.jen...@gmail.com
+ *
+ * Based on code from
+ * Moxa Technologies Co., Ltd. www.moxa.com
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed as is without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include linux/version.h
+#include linux/module.h
+#include linux/init.h
+#include linux/ioport.h
+#include linux/platform_device.h
+#include linux/delay.h
+#include linux/interrupt.h
+#include linux/blkdev.h
+#include linux/dma-mapping.h
+#include linux/dmaengine.h
+#include linux/mmc/host.h
+#include linux/mmc/sd.h
+#include linux/mmc/mmc.h
+#include linux/sched.h
+#include linux/io.h
+#include linux/gpio.h
+#include linux/sizes.h
+#include linux/of_address.h
+#include linux/of_irq.h
+#include linux/clk.h
+#include linux/bitops.h
+#include linux/of_dma.h
+
+#include asm/dma.h
+#include asm/irq.h
+
+#define MMC_RSP_SHORT 1
+#define MMC_RSP_LONG 2
+#define MMC_RSP_MASK 3
+#define
