diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.1/0190-Add-SMI-NAND-driver.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.1/0190-Add-SMI-NAND-driver.patch | 491 |
1 files changed, 0 insertions, 491 deletions
diff --git a/target/linux/brcm2708/patches-4.1/0190-Add-SMI-NAND-driver.patch b/target/linux/brcm2708/patches-4.1/0190-Add-SMI-NAND-driver.patch deleted file mode 100644 index 16c1a04d89..0000000000 --- a/target/linux/brcm2708/patches-4.1/0190-Add-SMI-NAND-driver.patch +++ /dev/null @@ -1,491 +0,0 @@ -From 157d840faf0595aadf6b3c483cbed19bbeb462ea Mon Sep 17 00:00:00 2001 -From: Luke Wren <wren6991@gmail.com> -Date: Sat, 5 Sep 2015 01:16:10 +0100 -Subject: [PATCH 190/222] Add SMI NAND driver - -Signed-off-by: Luke Wren <wren6991@gmail.com> ---- - .../bindings/mtd/brcm,bcm2835-smi-nand.txt | 42 ++++ - arch/arm/boot/dts/overlays/Makefile | 1 + - arch/arm/boot/dts/overlays/smi-nand-overlay.dts | 69 ++++++ - arch/arm/configs/bcm2709_defconfig | 7 + - arch/arm/configs/bcmrpi_defconfig | 7 + - drivers/mtd/nand/Kconfig | 7 + - drivers/mtd/nand/Makefile | 1 + - drivers/mtd/nand/bcm2835_smi_nand.c | 268 +++++++++++++++++++++ - 8 files changed, 402 insertions(+) - create mode 100644 Documentation/devicetree/bindings/mtd/brcm,bcm2835-smi-nand.txt - create mode 100644 arch/arm/boot/dts/overlays/smi-nand-overlay.dts - create mode 100644 drivers/mtd/nand/bcm2835_smi_nand.c - ---- /dev/null -+++ b/Documentation/devicetree/bindings/mtd/brcm,bcm2835-smi-nand.txt -@@ -0,0 +1,42 @@ -+* BCM2835 SMI NAND flash -+ -+This driver is a shim between the BCM2835 SMI driver (SMI is a peripheral for -+talking to parallel register interfaces) and Linux's MTD layer. -+ -+Required properties: -+- compatible: "brcm,bcm2835-smi-nand" -+- status: "okay" -+ -+Optional properties: -+- partition@n, where n is an integer from a consecutive sequence starting at 0 -+ - Difficult to store partition table on NAND device - normally put it -+ in the source code, kernel bootparams, or device tree (the best way!) -+ - Sub-properties: -+ - label: the partition name, as shown by mtdinfo /dev/mtd* -+ - reg: the size and offset of this partition. -+ - (optional) read-only: an empty property flagging as read only -+ -+Example: -+ -+nand: flash@0 { -+ compatible = "brcm,bcm2835-smi-nand"; -+ status = "okay"; -+ -+ partition@0 { -+ label = "stage2"; -+ // 128k -+ reg = <0 0x20000>; -+ read-only; -+ }; -+ partition@1 { -+ label = "firmware"; -+ // 16M -+ reg = <0x20000 0x1000000>; -+ read-only; -+ }; -+ partition@2 { -+ label = "root"; -+ // 2G -+ reg = <0x1020000 0x80000000>; -+ }; -+}; -\ No newline at end of file ---- a/arch/arm/boot/dts/overlays/Makefile -+++ b/arch/arm/boot/dts/overlays/Makefile -@@ -15,6 +15,7 @@ endif - dtb-$(RPI_DT_OVERLAYS) += ads7846-overlay.dtb - dtb-$(RPI_DT_OVERLAYS) += smi-overlay.dtb - dtb-$(RPI_DT_OVERLAYS) += smi-dev-overlay.dtb -+dtb-$(RPI_DT_OVERLAYS) += smi-nand-overlay.dtb - dtb-$(RPI_DT_OVERLAYS) += bmp085_i2c-sensor-overlay.dtb - dtb-$(RPI_DT_OVERLAYS) += dht11-overlay.dtb - dtb-$(RPI_DT_OVERLAYS) += enc28j60-overlay.dtb ---- /dev/null -+++ b/arch/arm/boot/dts/overlays/smi-nand-overlay.dts -@@ -0,0 +1,69 @@ -+// Description: Overlay to enable NAND flash through -+// the secondary memory interface -+// Author: Luke Wren -+ -+/dts-v1/; -+/plugin/; -+ -+/{ -+ compatible = "brcm,bcm2708"; -+ -+ fragment@0 { -+ target = <&smi>; -+ __overlay__ { -+ pinctrl-names = "default"; -+ pinctrl-0 = <&smi_pins>; -+ status = "okay"; -+ }; -+ }; -+ -+ fragment@1 { -+ target = <&soc>; -+ __overlay__ { -+ #address-cells = <1>; -+ #size-cells = <1>; -+ -+ nand: flash@0 { -+ compatible = "brcm,bcm2835-smi-nand"; -+ smi_handle = <&smi>; -+ #address-cells = <1>; -+ #size-cells = <1>; -+ status = "okay"; -+ -+ partition@0 { -+ label = "stage2"; -+ // 128k -+ reg = <0 0x20000>; -+ read-only; -+ }; -+ partition@1 { -+ label = "firmware"; -+ // 16M -+ reg = <0x20000 0x1000000>; -+ read-only; -+ }; -+ partition@2 { -+ label = "root"; -+ // 2G (will need to use 64 bit for >=4G) -+ reg = <0x1020000 0x80000000>; -+ }; -+ }; -+ }; -+ }; -+ -+ fragment@2 { -+ target = <&gpio>; -+ __overlay__ { -+ smi_pins: smi_pins { -+ brcm,pins = <0 1 2 3 4 5 6 7 8 9 10 11 -+ 12 13 14 15>; -+ /* Alt 1: SMI */ -+ brcm,function = <5 5 5 5 5 5 5 5 5 5 5 -+ 5 5 5 5 5>; -+ /* /CS, /WE and /OE are pulled high, as they are -+ generally active low signals */ -+ brcm,pull = <2 2 2 2 2 2 2 2 0 0 0 0 0 0 0 0>; -+ }; -+ }; -+ }; -+}; ---- a/arch/arm/configs/bcm2709_defconfig -+++ b/arch/arm/configs/bcm2709_defconfig -@@ -392,6 +392,10 @@ CONFIG_DEVTMPFS=y - CONFIG_DEVTMPFS_MOUNT=y - CONFIG_DMA_CMA=y - CONFIG_CMA_SIZE_MBYTES=5 -+CONFIG_MTD=m -+CONFIG_MTD_BLOCK=m -+CONFIG_MTD_NAND=m -+CONFIG_MTD_UBI=m - CONFIG_ZRAM=m - CONFIG_ZRAM_LZ4_COMPRESS=y - CONFIG_BLK_DEV_LOOP=y -@@ -1140,6 +1144,9 @@ CONFIG_CONFIGFS_FS=y - CONFIG_ECRYPT_FS=m - CONFIG_HFS_FS=m - CONFIG_HFSPLUS_FS=m -+CONFIG_JFFS2_FS=m -+CONFIG_JFFS2_SUMMARY=y -+CONFIG_UBIFS_FS=m - CONFIG_SQUASHFS=m - CONFIG_SQUASHFS_XATTR=y - CONFIG_SQUASHFS_LZO=y ---- a/arch/arm/configs/bcmrpi_defconfig -+++ b/arch/arm/configs/bcmrpi_defconfig -@@ -385,6 +385,10 @@ CONFIG_DEVTMPFS=y - CONFIG_DEVTMPFS_MOUNT=y - CONFIG_DMA_CMA=y - CONFIG_CMA_SIZE_MBYTES=5 -+CONFIG_MTD=m -+CONFIG_MTD_BLOCK=m -+CONFIG_MTD_NAND=m -+CONFIG_MTD_UBI=m - CONFIG_ZRAM=m - CONFIG_ZRAM_LZ4_COMPRESS=y - CONFIG_BLK_DEV_LOOP=y -@@ -1133,6 +1137,9 @@ CONFIG_CONFIGFS_FS=y - CONFIG_ECRYPT_FS=m - CONFIG_HFS_FS=m - CONFIG_HFSPLUS_FS=m -+CONFIG_JFFS2_FS=m -+CONFIG_JFFS2_SUMMARY=y -+CONFIG_UBIFS_FS=m - CONFIG_SQUASHFS=m - CONFIG_SQUASHFS_XATTR=y - CONFIG_SQUASHFS_LZO=y ---- a/drivers/mtd/nand/Kconfig -+++ b/drivers/mtd/nand/Kconfig -@@ -41,6 +41,13 @@ config MTD_SM_COMMON - tristate - default n - -+config MTD_NAND_BCM2835_SMI -+ tristate "Use Broadcom's Secondary Memory Interface as a NAND controller (BCM283x)" -+ depends on (MACH_BCM2708 || MACH_BCM2709 || ARCH_BCM2835) && BCM2835_SMI && MTD_NAND -+ default m -+ help -+ Uses the BCM2835's SMI peripheral as a NAND controller. -+ - config MTD_NAND_DENALI - tristate "Support Denali NAND controller" - depends on HAS_DMA ---- a/drivers/mtd/nand/Makefile -+++ b/drivers/mtd/nand/Makefile -@@ -14,6 +14,7 @@ obj-$(CONFIG_MTD_NAND_DENALI) += denali - obj-$(CONFIG_MTD_NAND_DENALI_PCI) += denali_pci.o - obj-$(CONFIG_MTD_NAND_DENALI_DT) += denali_dt.o - obj-$(CONFIG_MTD_NAND_AU1550) += au1550nd.o -+obj-$(CONFIG_MTD_NAND_BCM2835_SMI) += bcm2835_smi_nand.o - obj-$(CONFIG_MTD_NAND_BF5XX) += bf5xx_nand.o - obj-$(CONFIG_MTD_NAND_S3C2410) += s3c2410.o - obj-$(CONFIG_MTD_NAND_DAVINCI) += davinci_nand.o ---- /dev/null -+++ b/drivers/mtd/nand/bcm2835_smi_nand.c -@@ -0,0 +1,268 @@ -+/** -+ * NAND flash driver for Broadcom Secondary Memory Interface -+ * -+ * Written by Luke Wren <luke@raspberrypi.org> -+ * Copyright (c) 2015, Raspberry Pi (Trading) Ltd. -+ * -+ * Redistribution and use in source and binary forms, with or without -+ * modification, are permitted provided that the following conditions -+ * are met: -+ * 1. Redistributions of source code must retain the above copyright -+ * notice, this list of conditions, and the following disclaimer, -+ * without modification. -+ * 2. Redistributions in binary form must reproduce the above copyright -+ * notice, this list of conditions and the following disclaimer in the -+ * documentation and/or other materials provided with the distribution. -+ * 3. The names of the above-listed copyright holders may not be used -+ * to endorse or promote products derived from this software without -+ * specific prior written permission. -+ * -+ * ALTERNATIVELY, this software may be distributed under the terms of the -+ * GNU General Public License ("GPL") version 2, as published by the Free -+ * Software Foundation. -+ * -+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS -+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, -+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR -+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR -+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, -+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, -+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR -+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF -+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING -+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS -+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -+ */ -+ -+#include <linux/kernel.h> -+#include <linux/module.h> -+#include <linux/of.h> -+#include <linux/platform_device.h> -+#include <linux/slab.h> -+#include <linux/mtd/nand.h> -+#include <linux/mtd/partitions.h> -+ -+#include <linux/broadcom/bcm2835_smi.h> -+ -+#define DEVICE_NAME "bcm2835-smi-nand" -+#define DRIVER_NAME "smi-nand-bcm2835" -+ -+struct bcm2835_smi_nand_host { -+ struct bcm2835_smi_instance *smi_inst; -+ struct nand_chip nand_chip; -+ struct mtd_info mtd; -+ struct device *dev; -+}; -+ -+/**************************************************************************** -+* -+* NAND functionality implementation -+* -+****************************************************************************/ -+ -+#define SMI_NAND_CLE_PIN 0x01 -+#define SMI_NAND_ALE_PIN 0x02 -+ -+static inline void bcm2835_smi_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, -+ unsigned int ctrl) -+{ -+ uint32_t cmd32 = cmd; -+ uint32_t addr = ~(SMI_NAND_CLE_PIN | SMI_NAND_ALE_PIN); -+ struct bcm2835_smi_nand_host *host = dev_get_drvdata(mtd->dev.parent); -+ struct bcm2835_smi_instance *inst = host->smi_inst; -+ -+ if (ctrl & NAND_CLE) -+ addr |= SMI_NAND_CLE_PIN; -+ if (ctrl & NAND_ALE) -+ addr |= SMI_NAND_ALE_PIN; -+ /* Lower ALL the CS pins! */ -+ if (ctrl & NAND_NCE) -+ addr &= (SMI_NAND_CLE_PIN | SMI_NAND_ALE_PIN); -+ -+ bcm2835_smi_set_address(inst, addr); -+ -+ if (cmd != NAND_CMD_NONE) -+ bcm2835_smi_write_buf(inst, &cmd32, 1); -+} -+ -+static inline uint8_t bcm2835_smi_nand_read_byte(struct mtd_info *mtd) -+{ -+ uint8_t byte; -+ struct bcm2835_smi_nand_host *host = dev_get_drvdata(mtd->dev.parent); -+ struct bcm2835_smi_instance *inst = host->smi_inst; -+ -+ bcm2835_smi_read_buf(inst, &byte, 1); -+ return byte; -+} -+ -+static inline void bcm2835_smi_nand_write_byte(struct mtd_info *mtd, -+ uint8_t byte) -+{ -+ struct bcm2835_smi_nand_host *host = dev_get_drvdata(mtd->dev.parent); -+ struct bcm2835_smi_instance *inst = host->smi_inst; -+ -+ bcm2835_smi_write_buf(inst, &byte, 1); -+} -+ -+static inline void bcm2835_smi_nand_write_buf(struct mtd_info *mtd, -+ const uint8_t *buf, int len) -+{ -+ struct bcm2835_smi_nand_host *host = dev_get_drvdata(mtd->dev.parent); -+ struct bcm2835_smi_instance *inst = host->smi_inst; -+ -+ bcm2835_smi_write_buf(inst, buf, len); -+} -+ -+static inline void bcm2835_smi_nand_read_buf(struct mtd_info *mtd, -+ uint8_t *buf, int len) -+{ -+ struct bcm2835_smi_nand_host *host = dev_get_drvdata(mtd->dev.parent); -+ struct bcm2835_smi_instance *inst = host->smi_inst; -+ -+ bcm2835_smi_read_buf(inst, buf, len); -+} -+ -+/**************************************************************************** -+* -+* Probe and remove functions -+* -+***************************************************************************/ -+ -+static int bcm2835_smi_nand_probe(struct platform_device *pdev) -+{ -+ struct bcm2835_smi_nand_host *host; -+ struct nand_chip *this; -+ struct mtd_info *mtd; -+ struct device *dev = &pdev->dev; -+ struct device_node *node = dev->of_node, *smi_node; -+ struct mtd_part_parser_data ppdata; -+ struct smi_settings *smi_settings; -+ struct bcm2835_smi_instance *smi_inst; -+ int ret = -ENXIO; -+ -+ if (!node) { -+ dev_err(dev, "No device tree node supplied!"); -+ return -EINVAL; -+ } -+ -+ smi_node = of_parse_phandle(node, "smi_handle", 0); -+ -+ /* Request use of SMI peripheral: */ -+ smi_inst = bcm2835_smi_get(smi_node); -+ -+ if (!smi_inst) { -+ dev_err(dev, "Could not register with SMI."); -+ return -EPROBE_DEFER; -+ } -+ -+ /* Set SMI timing and bus width */ -+ -+ smi_settings = bcm2835_smi_get_settings_from_regs(smi_inst); -+ -+ smi_settings->data_width = SMI_WIDTH_8BIT; -+ smi_settings->read_setup_time = 2; -+ smi_settings->read_hold_time = 1; -+ smi_settings->read_pace_time = 1; -+ smi_settings->read_strobe_time = 3; -+ -+ smi_settings->write_setup_time = 2; -+ smi_settings->write_hold_time = 1; -+ smi_settings->write_pace_time = 1; -+ smi_settings->write_strobe_time = 3; -+ -+ bcm2835_smi_set_regs_from_settings(smi_inst); -+ -+ host = devm_kzalloc(dev, sizeof(struct bcm2835_smi_nand_host), -+ GFP_KERNEL); -+ if (!host) -+ return -ENOMEM; -+ -+ host->dev = dev; -+ host->smi_inst = smi_inst; -+ -+ platform_set_drvdata(pdev, host); -+ -+ /* Link the structures together */ -+ -+ this = &host->nand_chip; -+ mtd = &host->mtd; -+ mtd->priv = this; -+ mtd->owner = THIS_MODULE; -+ mtd->dev.parent = dev; -+ mtd->name = DRIVER_NAME; -+ ppdata.of_node = node; -+ -+ /* 20 us command delay time... */ -+ this->chip_delay = 20; -+ -+ this->priv = host; -+ this->cmd_ctrl = bcm2835_smi_nand_cmd_ctrl; -+ this->read_byte = bcm2835_smi_nand_read_byte; -+ this->write_byte = bcm2835_smi_nand_write_byte; -+ this->write_buf = bcm2835_smi_nand_write_buf; -+ this->read_buf = bcm2835_smi_nand_read_buf; -+ -+ this->ecc.mode = NAND_ECC_SOFT; -+ -+ /* Should never be accessed directly: */ -+ -+ this->IO_ADDR_R = (void *)0xdeadbeef; -+ this->IO_ADDR_W = (void *)0xdeadbeef; -+ -+ /* First scan to find the device and get the page size */ -+ -+ if (nand_scan_ident(mtd, 1, NULL)) -+ return -ENXIO; -+ -+ /* Second phase scan */ -+ -+ if (nand_scan_tail(mtd)) -+ return -ENXIO; -+ -+ ret = mtd_device_parse_register(mtd, NULL, &ppdata, NULL, 0); -+ if (!ret) -+ return 0; -+ -+ nand_release(mtd); -+ return -EINVAL; -+} -+ -+static int bcm2835_smi_nand_remove(struct platform_device *pdev) -+{ -+ struct bcm2835_smi_nand_host *host = platform_get_drvdata(pdev); -+ -+ nand_release(&host->mtd); -+ -+ return 0; -+} -+ -+/**************************************************************************** -+* -+* Register the driver with device tree -+* -+***************************************************************************/ -+ -+static const struct of_device_id bcm2835_smi_nand_of_match[] = { -+ {.compatible = "brcm,bcm2835-smi-nand",}, -+ { /* sentinel */ } -+}; -+ -+MODULE_DEVICE_TABLE(of, bcm2835_smi_nand_of_match); -+ -+static struct platform_driver bcm2835_smi_nand_driver = { -+ .probe = bcm2835_smi_nand_probe, -+ .remove = bcm2835_smi_nand_remove, -+ .driver = { -+ .name = DRIVER_NAME, -+ .owner = THIS_MODULE, -+ .of_match_table = bcm2835_smi_nand_of_match, -+ }, -+}; -+ -+module_platform_driver(bcm2835_smi_nand_driver); -+ -+MODULE_ALIAS("platform:smi-nand-bcm2835"); -+MODULE_LICENSE("GPL"); -+MODULE_DESCRIPTION -+ ("Driver for NAND chips using Broadcom Secondary Memory Interface"); -+MODULE_AUTHOR("Luke Wren <luke@raspberrypi.org>"); |