[PATCH v11 0/3] mtd: nand: jz4780: Add NAND and BCH drivers

[PATCH v11 0/3] mtd: nand: jz4780: Add NAND and BCH drivers

[Harvey Hunt]

Hi,

This series adds support for the BCH controller and NAND devices on
the Ingenic JZ4780 SoC.

Tested on the MIPS Creator Ci20 board. All dependencies are now in
mainline.

This version of the series is based on l2-mtd/master.

As suggested by Boris [0], refactoring work has been done to treat NAND
chips as children nodes of the NAND controller.

Review and feedback welcome.

Thanks,

Harvey

Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org

Alex Smith (3):
  dt-bindings: binding for jz4780-{nand,bch}
  mtd: nand: jz4780: driver for NAND devices on JZ4780 SoCs
  MIPS: dts: jz4780/ci20: Add NEMC, BCH and NAND device tree nodes

 .../bindings/mtd/ingenic,jz4780-nand.txt           |  86 +++++
 arch/mips/boot/dts/ingenic/ci20.dts                |  63 +++
 arch/mips/boot/dts/ingenic/jz4780.dtsi             |  26 ++
 drivers/mtd/nand/Kconfig                           |   7 +
 drivers/mtd/nand/Makefile                          |   1 +
 drivers/mtd/nand/jz4780_bch.c                      | 380 ++++++++++++++++++
 drivers/mtd/nand/jz4780_bch.h                      |  43 +++
 drivers/mtd/nand/jz4780_nand.c                     | 424 +++++++++++++++++++++
 8 files changed, 1030 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mtd/ingenic,jz4780-nand.txt
 create mode 100644 drivers/mtd/nand/jz4780_bch.c
 create mode 100644 drivers/mtd/nand/jz4780_bch.h
 create mode 100644 drivers/mtd/nand/jz4780_nand.c

-- 
2.6.4

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[PATCH v11 1/3] dt-bindings: binding for jz4780-{nand,bch}

[Harvey Hunt]

From: Alex Smith <alex.smith-1AXoQHu6uovQT0dZR+AlfA@public.gmane.org>

Add DT bindings for NAND devices connected to the NEMC on JZ4780 SoCs,
as well as the hardware BCH controller, used by the jz4780_{nand,bch}
drivers.

Signed-off-by: Alex Smith <alex.smith-1AXoQHu6uovQT0dZR+AlfA@public.gmane.org>
Cc: Zubair Lutfullah Kakakhel <Zubair.Kakakhel-1AXoQHu6uovQT0dZR+AlfA@public.gmane.org>
Cc: David Woodhouse <dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
Cc: Brian Norris <computersforpeace-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: linux-mtd-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org
Signed-off-by: Harvey Hunt <harvey.hunt-1AXoQHu6uovQT0dZR+AlfA@public.gmane.org>
Acked-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Reviewed-by: Boris Brezillon <boris.brezillon-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
---
v10 -> v11:
 - Added Boris Brezillon's Reviewed-By.

v9 -> v10:
 - Added Rob Herring's Acked-by.

v8 -> v9:
 - Document that partitions are represented as a child node of a NAND chip.

v7 -> v8:
 - Describe how NAND chips are now child nodes of the NAND controller.

v6 -> v7:
 - Add nand-ecc-mode to DT bindings.
 - Add nand-on-flash-bbt to DT bindings.

v5 -> v6:
 - No change.

v4 -> v5:
 - Rename ingenic,bch-device to ingenic,bch-controller to fit with
   existing convention.

v3 -> v4:
 - No change

v2 -> v3:
 - Rebase to 4.0-rc6
 - Changed ingenic,ecc-size to common nand-ecc-step-size
 - Changed ingenic,ecc-strength to common nand-ecc-strength
 - Changed ingenic,busy-gpio to common rb-gpios
 - Changed ingenic,wp-gpio to common wp-gpios

v1 -> v2:
 - Rebase to 4.0-rc3

 .../bindings/mtd/ingenic,jz4780-nand.txt           | 86 ++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mtd/ingenic,jz4780-nand.txt

diff --git a/Documentation/devicetree/bindings/mtd/ingenic,jz4780-nand.txt b/Documentation/devicetree/bindings/mtd/ingenic,jz4780-nand.txt
new file mode 100644
index 0000000..29ea585
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/ingenic,jz4780-nand.txt
@@ -0,0 +1,86 @@
+* Ingenic JZ4780 NAND/BCH
+
+This file documents the device tree bindings for NAND flash devices on the
+JZ4780. NAND devices are connected to the NEMC controller (described in
+memory-controllers/ingenic,jz4780-nemc.txt), and thus NAND device nodes must
+be children of the NEMC node.
+
+Required NAND controller device properties:
+- compatible: Should be set to "ingenic,jz4780-nand".
+- reg: For each bank with a NAND chip attached, should specify a bank number,
+  an offset of 0 and a size of 0x1000000 (i.e. the whole NEMC bank).
+
+Optional NAND controller device properties:
+- ingenic,bch-controller: To make use of the hardware BCH controller, this
+  property must contain a phandle for the BCH controller node. The required
+  properties for this node are described below. If this is not specified,
+  software BCH will be used instead.
+
+Optional children nodes:
+- Individual NAND chips are children of the NAND controller node.
+
+Required children node properties:
+- reg: An integer ranging from 1 to 6 representing the CS line to use.
+
+Optional children node properties:
+- nand-ecc-step-size: ECC block size in bytes.
+- nand-ecc-strength: ECC strength (max number of correctable bits).
+- nand-ecc-mode: String, operation mode of the NAND ecc mode. "hw" by default
+- nand-on-flash-bbt: boolean to enable on flash bbt option, if not present false
+- rb-gpios: GPIO specifier for the busy pin.
+- wp-gpios: GPIO specifier for the write protect pin.
+
+Optional child node of NAND chip nodes:
+- partitions: see Documentation/devicetree/bindings/mtd/partition.txt
+
+Example:
+
+nemc: nemc@13410000 {
+	...
+
+	nandc: nand-controller@1 {
+		compatible = "ingenic,jz4780-nand";
+		reg = <1 0 0x1000000>;	/* Bank 1 */
+
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		ingenic,bch-controller = <&bch>;
+
+		nand@1 {
+			reg = <1>;
+
+			nand-ecc-step-size = <1024>;
+			nand-ecc-strength = <24>;
+			nand-ecc-mode = "hw";
+			nand-on-flash-bbt;
+
+			rb-gpios = <&gpa 20 GPIO_ACTIVE_LOW>;
+			wp-gpios = <&gpf 22 GPIO_ACTIVE_LOW>;
+
+			partitions {
+				#address-cells = <2>;
+				#size-cells = <2>;
+				...
+			}
+		};
+	};
+};
+
+The BCH controller is a separate SoC component used for error correction on
+NAND devices. The following is a description of the device properties for a
+BCH controller.
+
+Required BCH properties:
+- compatible: Should be set to "ingenic,jz4780-bch".
+- reg: Should specify the BCH controller registers location and length.
+- clocks: Clock for the BCH controller.
+
+Example:
+
+bch: bch@134d0000 {
+	compatible = "ingenic,jz4780-bch";
+	reg = <0x134d0000 0x10000>;
+
+	clocks = <&cgu JZ4780_CLK_BCH>;
+};
-- 
2.6.4

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[PATCH v11 3/3] MIPS: dts: jz4780/ci20: Add NEMC, BCH and NAND device tree nodes

[Harvey Hunt]

From: Alex Smith <alex.smith@imgtec.com>

Add device tree nodes for the NEMC and BCH to the JZ4780 device tree,
and make use of them in the Ci20 device tree to add a node for the
board's NAND.

Note that since the pinctrl driver is not yet upstream, this includes
neither pin configuration nor busy/write-protect GPIO pins for the
NAND. Use of the NAND relies on the boot loader to have left the pins
configured in a usable state, which should be the case when booted
from the NAND.

Signed-off-by: Alex Smith <alex.smith@imgtec.com>
Cc: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mtd@lists.infradead.org
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: robh@kernel.org
Signed-off-by: Harvey Hunt <harvey.hunt@imgtec.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
---
v10 -> v11:
 - Added Boris Brezillon's Reviewed-By.

v9 -> v10:
 - No change.

v8 -> v9:
 - Represent the partition table as a subnode of a NAND chip. 

v7 -> v8:
 - Describe the NAND chips as children nodes of the NAND controller.
 - Remove ingenic, prefix from ECC settings.
 - Renamed some ECC settings.

v6 -> v7:
 - Add nand-ecc-mode to DT.
 - Add nand-on-flash-bbt to DT.

v4 -> v5:
 - New patch adding DT nodes for the NAND so that the driver can be
   tested.

 arch/mips/boot/dts/ingenic/ci20.dts    | 63 ++++++++++++++++++++++++++++++++++
 arch/mips/boot/dts/ingenic/jz4780.dtsi | 26 ++++++++++++++
 2 files changed, 89 insertions(+)

diff --git a/arch/mips/boot/dts/ingenic/ci20.dts b/arch/mips/boot/dts/ingenic/ci20.dts
index 9fcb9e7..782258c 100644
--- a/arch/mips/boot/dts/ingenic/ci20.dts
+++ b/arch/mips/boot/dts/ingenic/ci20.dts
@@ -42,3 +42,66 @@
 &uart4 {
 	status = "okay";
 };
+
+&nemc {
+	status = "okay";
+
+	nandc: nand-controller@1 {
+		compatible = "ingenic,jz4780-nand";
+		reg = <1 0 0x1000000>;
+
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		ingenic,bch-controller = <&bch>;
+
+		ingenic,nemc-tAS = <10>;
+		ingenic,nemc-tAH = <5>;
+		ingenic,nemc-tBP = <10>;
+		ingenic,nemc-tAW = <15>;
+		ingenic,nemc-tSTRV = <100>;
+
+		nand@1 {
+			reg = <1>;
+
+			nand-ecc-step-size = <1024>;
+			nand-ecc-strength = <24>;
+			nand-ecc-mode = "hw";
+			nand-on-flash-bbt;
+
+			partitions {
+				#address-cells = <2>;
+				#size-cells = <2>;
+
+				partition@0 {
+					label = "u-boot-spl";
+					reg = <0x0 0x0 0x0 0x800000>;
+				};
+
+				partition@0x800000 {
+					label = "u-boot";
+					reg = <0x0 0x800000 0x0 0x200000>;
+				};
+
+				partition@0xa00000 {
+					label = "u-boot-env";
+					reg = <0x0 0xa00000 0x0 0x200000>;
+				};
+
+				partition@0xc00000 {
+					label = "boot";
+					reg = <0x0 0xc00000 0x0 0x4000000>;
+				};
+
+				partition@0x8c00000 {
+					label = "system";
+					reg = <0x0 0x4c00000 0x1 0xfb400000>;
+				};
+			};
+		};
+	};
+};
+
+&bch {
+	status = "okay";
+};
diff --git a/arch/mips/boot/dts/ingenic/jz4780.dtsi b/arch/mips/boot/dts/ingenic/jz4780.dtsi
index 65389f6..b868b42 100644
--- a/arch/mips/boot/dts/ingenic/jz4780.dtsi
+++ b/arch/mips/boot/dts/ingenic/jz4780.dtsi
@@ -108,4 +108,30 @@
 
 		status = "disabled";
 	};
+
+	nemc: nemc@13410000 {
+		compatible = "ingenic,jz4780-nemc";
+		reg = <0x13410000 0x10000>;
+		#address-cells = <2>;
+		#size-cells = <1>;
+		ranges = <1 0 0x1b000000 0x1000000
+			  2 0 0x1a000000 0x1000000
+			  3 0 0x19000000 0x1000000
+			  4 0 0x18000000 0x1000000
+			  5 0 0x17000000 0x1000000
+			  6 0 0x16000000 0x1000000>;
+
+		clocks = <&cgu JZ4780_CLK_NEMC>;
+
+		status = "disabled";
+	};
+
+	bch: bch@134d0000 {
+		compatible = "ingenic,jz4780-bch";
+		reg = <0x134d0000 0x10000>;
+
+		clocks = <&cgu JZ4780_CLK_BCH>;
+
+		status = "disabled";
+	};
 };
-- 
2.6.4

Re: [PATCH v11 1/3] dt-bindings: binding for jz4780-{nand,bch}

[Brian Norris]

On Mon, Jan 04, 2016 at 12:34:42PM +0000, Harvey Hunt wrote:
> From: Alex Smith <alex.smith-1AXoQHu6uovQT0dZR+AlfA@public.gmane.org>
> 
> Add DT bindings for NAND devices connected to the NEMC on JZ4780 SoCs,
> as well as the hardware BCH controller, used by the jz4780_{nand,bch}
> drivers.
> 
> Signed-off-by: Alex Smith <alex.smith-1AXoQHu6uovQT0dZR+AlfA@public.gmane.org>
> Cc: Zubair Lutfullah Kakakhel <Zubair.Kakakhel-1AXoQHu6uovQT0dZR+AlfA@public.gmane.org>
> Cc: David Woodhouse <dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
> Cc: Brian Norris <computersforpeace-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> Cc: linux-mtd-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
> Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> Cc: robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org
> Signed-off-by: Harvey Hunt <harvey.hunt-1AXoQHu6uovQT0dZR+AlfA@public.gmane.org>
> Acked-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
> Reviewed-by: Boris Brezillon <boris.brezillon-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
> ---
> v10 -> v11:
>  - Added Boris Brezillon's Reviewed-By.

Applied just patch 1 for now. I had some small comments on patch 2. And
you need to send patch 3 to linux-mips and the MIPS maintainer.

Brian
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Re: [PATCH v11 3/3] MIPS: dts: jz4780/ci20: Add NEMC, BCH and NAND device tree nodes

[Brian Norris]

On Mon, Jan 04, 2016 at 12:34:44PM +0000, Harvey Hunt wrote:
> diff --git a/arch/mips/boot/dts/ingenic/ci20.dts b/arch/mips/boot/dts/ingenic/ci20.dts
> index 9fcb9e7..782258c 100644
> --- a/arch/mips/boot/dts/ingenic/ci20.dts
> +++ b/arch/mips/boot/dts/ingenic/ci20.dts

As I noted on patch 1, you need to send this to linux-mips + Ralf.

> @@ -42,3 +42,66 @@
>  &uart4 {
>  	status = "okay";
>  };
> +
> +&nemc {
> +	status = "okay";
> +
> +	nandc: nand-controller@1 {
> +		compatible = "ingenic,jz4780-nand";
> +		reg = <1 0 0x1000000>;
> +
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		ingenic,bch-controller = <&bch>;
> +
> +		ingenic,nemc-tAS = <10>;
> +		ingenic,nemc-tAH = <5>;
> +		ingenic,nemc-tBP = <10>;
> +		ingenic,nemc-tAW = <15>;
> +		ingenic,nemc-tSTRV = <100>;
> +
> +		nand@1 {
> +			reg = <1>;
> +
> +			nand-ecc-step-size = <1024>;
> +			nand-ecc-strength = <24>;
> +			nand-ecc-mode = "hw";
> +			nand-on-flash-bbt;
> +
> +			partitions {
> +				#address-cells = <2>;
> +				#size-cells = <2>;

This binding was updated, so you need:

				compatible = "fixed-partitions";

Brian

> +
> +				partition@0 {
> +					label = "u-boot-spl";
> +					reg = <0x0 0x0 0x0 0x800000>;
> +				};
> +
> +				partition@0x800000 {
> +					label = "u-boot";
> +					reg = <0x0 0x800000 0x0 0x200000>;
> +				};
> +
> +				partition@0xa00000 {
> +					label = "u-boot-env";
> +					reg = <0x0 0xa00000 0x0 0x200000>;
> +				};
> +
> +				partition@0xc00000 {
> +					label = "boot";
> +					reg = <0x0 0xc00000 0x0 0x4000000>;
> +				};
> +
> +				partition@0x8c00000 {
> +					label = "system";
> +					reg = <0x0 0x4c00000 0x1 0xfb400000>;
> +				};
> +			};
> +		};
> +	};
> +};
> +
> +&bch {
> +	status = "okay";
> +};

Brian

Re: [PATCH v11 3/3] MIPS: dts: jz4780/ci20: Add NEMC, BCH and NAND device tree nodes

[Harvey Hunt]

Hi Brian,

On 07/01/16 01:29, Brian Norris wrote:
> On Mon, Jan 04, 2016 at 12:34:44PM +0000, Harvey Hunt wrote:
>> diff --git a/arch/mips/boot/dts/ingenic/ci20.dts b/arch/mips/boot/dts/ingenic/ci20.dts
>> index 9fcb9e7..782258c 100644
>> --- a/arch/mips/boot/dts/ingenic/ci20.dts
>> +++ b/arch/mips/boot/dts/ingenic/ci20.dts
>
> As I noted on patch 1, you need to send this to linux-mips + Ralf.

I forgot to CC Ralf on this version, but he took v9 (no change between 
v9 and v11) through linux-mips as can be seen here: 
http://patchwork.linux-mips.org/patch/11695/

>
>> @@ -42,3 +42,66 @@
>>   &uart4 {
>>   	status = "okay";
>>   };
>> +
>> +&nemc {
>> +	status = "okay";
>> +
>> +	nandc: nand-controller@1 {
>> +		compatible = "ingenic,jz4780-nand";
>> +		reg = <1 0 0x1000000>;
>> +
>> +		#address-cells = <1>;
>> +		#size-cells = <0>;
>> +
>> +		ingenic,bch-controller = <&bch>;
>> +
>> +		ingenic,nemc-tAS = <10>;
>> +		ingenic,nemc-tAH = <5>;
>> +		ingenic,nemc-tBP = <10>;
>> +		ingenic,nemc-tAW = <15>;
>> +		ingenic,nemc-tSTRV = <100>;
>> +
>> +		nand@1 {
>> +			reg = <1>;
>> +
>> +			nand-ecc-step-size = <1024>;
>> +			nand-ecc-strength = <24>;
>> +			nand-ecc-mode = "hw";
>> +			nand-on-flash-bbt;
>> +
>> +			partitions {
>> +				#address-cells = <2>;
>> +				#size-cells = <2>;
>
> This binding was updated, so you need:
>
> 				compatible = "fixed-partitions";

This has been fixed in mips-linux here: 
http://patchwork.linux-mips.org/patch/11914/

Thanks,

Harvey

>
> Brian
>
>> +
>> +				partition@0 {
>> +					label = "u-boot-spl";
>> +					reg = <0x0 0x0 0x0 0x800000>;
>> +				};
>> +
>> +				partition@0x800000 {
>> +					label = "u-boot";
>> +					reg = <0x0 0x800000 0x0 0x200000>;
>> +				};
>> +
>> +				partition@0xa00000 {
>> +					label = "u-boot-env";
>> +					reg = <0x0 0xa00000 0x0 0x200000>;
>> +				};
>> +
>> +				partition@0xc00000 {
>> +					label = "boot";
>> +					reg = <0x0 0xc00000 0x0 0x4000000>;
>> +				};
>> +
>> +				partition@0x8c00000 {
>> +					label = "system";
>> +					reg = <0x0 0x4c00000 0x1 0xfb400000>;
>> +				};
>> +			};
>> +		};
>> +	};
>> +};
>> +
>> +&bch {
>> +	status = "okay";
>> +};
>
> Brian
>

Re: [PATCH v11 3/3] MIPS: dts: jz4780/ci20: Add NEMC, BCH and NAND device tree nodes

[Brian Norris]

Hi Harvey + Ralf,

On Thu, Jan 07, 2016 at 09:40:13AM +0000, Harvey Hunt wrote:
> On 07/01/16 01:29, Brian Norris wrote:
> >On Mon, Jan 04, 2016 at 12:34:44PM +0000, Harvey Hunt wrote:
> >>diff --git a/arch/mips/boot/dts/ingenic/ci20.dts b/arch/mips/boot/dts/ingenic/ci20.dts
> >>index 9fcb9e7..782258c 100644
> >>--- a/arch/mips/boot/dts/ingenic/ci20.dts
> >>+++ b/arch/mips/boot/dts/ingenic/ci20.dts
> >
> >As I noted on patch 1, you need to send this to linux-mips + Ralf.
> 
> I forgot to CC Ralf on this version, but he took v9 (no change
> between v9 and v11) through linux-mips as can be seen here:
> http://patchwork.linux-mips.org/patch/11695/

OK.

> >>@@ -42,3 +42,66 @@
> >>  &uart4 {
> >>  	status = "okay";
> >>  };
> >>+
> >>+&nemc {
> >>+	status = "okay";
> >>+
> >>+	nandc: nand-controller@1 {
> >>+		compatible = "ingenic,jz4780-nand";
> >>+		reg = <1 0 0x1000000>;
> >>+
> >>+		#address-cells = <1>;
> >>+		#size-cells = <0>;
> >>+
> >>+		ingenic,bch-controller = <&bch>;
> >>+
> >>+		ingenic,nemc-tAS = <10>;
> >>+		ingenic,nemc-tAH = <5>;
> >>+		ingenic,nemc-tBP = <10>;
> >>+		ingenic,nemc-tAW = <15>;
> >>+		ingenic,nemc-tSTRV = <100>;
> >>+
> >>+		nand@1 {
> >>+			reg = <1>;
> >>+
> >>+			nand-ecc-step-size = <1024>;
> >>+			nand-ecc-strength = <24>;
> >>+			nand-ecc-mode = "hw";
> >>+			nand-on-flash-bbt;
> >>+
> >>+			partitions {
> >>+				#address-cells = <2>;
> >>+				#size-cells = <2>;
> >
> >This binding was updated, so you need:
> >
> >				compatible = "fixed-partitions";
> 
> This has been fixed in mips-linux here:
> http://patchwork.linux-mips.org/patch/11914/

Ralf: it looks like you applied the DTS changes twice, essentially.
Might want to fix that:

[From arch/mips/boot/dts/ingenic/ci20.dts]
...
&nemc {
	...
	nandc: nand-controller@1 {
		...
		nand@1 {
			...
			partitions {
				compatible = "fixed-partitions";
				...
			};
		};
	};
};

&bch {
	status = "okay";
};

&nemc {
	...
	nandc: nand-controller@1 {
		...
		nand@1 {
			...
			partitions {
				...
			};
		};
	};
};

&bch {
	status = "okay";
};


Brian
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