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Diffstat (limited to 'target/linux/lantiq/patches-2.6.32/0004-MIPS-Lantiq-Add-NOR-flash-support.patch')
-rw-r--r--target/linux/lantiq/patches-2.6.32/0004-MIPS-Lantiq-Add-NOR-flash-support.patch301
1 files changed, 0 insertions, 301 deletions
diff --git a/target/linux/lantiq/patches-2.6.32/0004-MIPS-Lantiq-Add-NOR-flash-support.patch b/target/linux/lantiq/patches-2.6.32/0004-MIPS-Lantiq-Add-NOR-flash-support.patch
deleted file mode 100644
index 03e86bb523..0000000000
--- a/target/linux/lantiq/patches-2.6.32/0004-MIPS-Lantiq-Add-NOR-flash-support.patch
+++ /dev/null
@@ -1,301 +0,0 @@
-From cd0d53b24ca744295d2cdf69bb2b659571091b75 Mon Sep 17 00:00:00 2001
-From: John Crispin <blogic@openwrt.org>
-Date: Tue, 12 Apr 2011 18:10:01 +0200
-Subject: [PATCH 04/13] MIPS: Lantiq: Add NOR flash support
-
-This patch adds the driver/map for NOR devices attached to the SoC via the
-External Bus Unit (EBU).
-
-Signed-off-by: John Crispin <blogic@openwrt.org>
-Signed-off-by: Ralph Hempel <ralph.hempel@lantiq.com>
-Cc: David Woodhouse <dwmw2@infradead.org>
-Cc: Daniel Schwierzeck <daniel.schwierzeck@googlemail.com>
-Cc: linux-mips@linux-mips.org
-Cc: linux-mtd@lists.infradead.org
-Acked-by: Artem Bityutskiy <dedekind1@gmail.com>
-Patchwork: https://patchwork.linux-mips.org/patch/2285/
-Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
----
- drivers/mtd/maps/Kconfig | 7 +
- drivers/mtd/maps/Makefile | 1 +
- drivers/mtd/maps/lantiq-flash.c | 251 +++++++++++++++++++++++++++++++++++++++
- 3 files changed, 259 insertions(+), 0 deletions(-)
- create mode 100644 drivers/mtd/maps/lantiq-flash.c
-
---- a/drivers/mtd/maps/Kconfig
-+++ b/drivers/mtd/maps/Kconfig
-@@ -259,6 +259,13 @@
- help
- Flash memory access on AMD Alchemy Pb/Db/RDK Reference Boards
-
-+config MTD_LANTIQ
-+ tristate "Lantiq SoC NOR support"
-+ depends on LANTIQ
-+ select MTD_PARTITIONS
-+ help
-+ Support for NOR flash attached to the Lantiq SoC's External Bus Unit.
-+
- config MTD_DILNETPC
- tristate "CFI Flash device mapped on DIL/Net PC"
- depends on X86 && MTD_CONCAT && MTD_PARTITIONS && MTD_CFI_INTELEXT && BROKEN
---- a/drivers/mtd/maps/Makefile
-+++ b/drivers/mtd/maps/Makefile
-@@ -61,3 +61,4 @@
- obj-$(CONFIG_MTD_RBTX4939) += rbtx4939-flash.o
- obj-$(CONFIG_MTD_VMU) += vmu-flash.o
- obj-$(CONFIG_MTD_GPIO_ADDR) += gpio-addr-flash.o
-+obj-$(CONFIG_MTD_LANTIQ) += lantiq-flash.o
---- /dev/null
-+++ b/drivers/mtd/maps/lantiq-flash.c
-@@ -0,0 +1,251 @@
-+/*
-+ * This program is free software; you can redistribute it and/or modify it
-+ * under the terms of the GNU General Public License version 2 as published
-+ * by the Free Software Foundation.
-+ *
-+ * Copyright (C) 2004 Liu Peng Infineon IFAP DC COM CPE
-+ * Copyright (C) 2010 John Crispin <blogic@openwrt.org>
-+ */
-+
-+#include <linux/module.h>
-+#include <linux/types.h>
-+#include <linux/kernel.h>
-+#include <linux/io.h>
-+#include <linux/slab.h>
-+#include <linux/init.h>
-+#include <linux/mtd/mtd.h>
-+#include <linux/mtd/map.h>
-+#include <linux/mtd/partitions.h>
-+#include <linux/mtd/cfi.h>
-+#include <linux/platform_device.h>
-+#include <linux/mtd/physmap.h>
-+
-+#include <lantiq_soc.h>
-+#include <lantiq_platform.h>
-+
-+/*
-+ * The NOR flash is connected to the same external bus unit (EBU) as PCI.
-+ * To make PCI work we need to enable the endianness swapping for the address
-+ * written to the EBU. This endianness swapping works for PCI correctly but
-+ * fails for attached NOR devices. To workaround this we need to use a complex
-+ * map. The workaround involves swapping all addresses whilst probing the chip.
-+ * Once probing is complete we stop swapping the addresses but swizzle the
-+ * unlock addresses to ensure that access to the NOR device works correctly.
-+ */
-+
-+enum {
-+ LTQ_NOR_PROBING,
-+ LTQ_NOR_NORMAL
-+};
-+
-+struct ltq_mtd {
-+ struct resource *res;
-+ struct mtd_info *mtd;
-+ struct map_info *map;
-+};
-+
-+static char ltq_map_name[] = "ltq_nor";
-+
-+static map_word
-+ltq_read16(struct map_info *map, unsigned long adr)
-+{
-+ unsigned long flags;
-+ map_word temp;
-+
-+ if (map->map_priv_1 == LTQ_NOR_PROBING)
-+ adr ^= 2;
-+ spin_lock_irqsave(&ebu_lock, flags);
-+ temp.x[0] = *(u16 *)(map->virt + adr);
-+ spin_unlock_irqrestore(&ebu_lock, flags);
-+ return temp;
-+}
-+
-+static void
-+ltq_write16(struct map_info *map, map_word d, unsigned long adr)
-+{
-+ unsigned long flags;
-+
-+ if (map->map_priv_1 == LTQ_NOR_PROBING)
-+ adr ^= 2;
-+ spin_lock_irqsave(&ebu_lock, flags);
-+ *(u16 *)(map->virt + adr) = d.x[0];
-+ spin_unlock_irqrestore(&ebu_lock, flags);
-+}
-+
-+/*
-+ * The following 2 functions copy data between iomem and a cached memory
-+ * section. As memcpy() makes use of pre-fetching we cannot use it here.
-+ * The normal alternative of using memcpy_{to,from}io also makes use of
-+ * memcpy() on MIPS so it is not applicable either. We are therefore stuck
-+ * with having to use our own loop.
-+ */
-+static void
-+ltq_copy_from(struct map_info *map, void *to,
-+ unsigned long from, ssize_t len)
-+{
-+ unsigned char *f = (unsigned char *)map->virt + from;
-+ unsigned char *t = (unsigned char *)to;
-+ unsigned long flags;
-+
-+ spin_lock_irqsave(&ebu_lock, flags);
-+ while (len--)
-+ *t++ = *f++;
-+ spin_unlock_irqrestore(&ebu_lock, flags);
-+}
-+
-+static void
-+ltq_copy_to(struct map_info *map, unsigned long to,
-+ const void *from, ssize_t len)
-+{
-+ unsigned char *f = (unsigned char *)from;
-+ unsigned char *t = (unsigned char *)map->virt + to;
-+ unsigned long flags;
-+
-+ spin_lock_irqsave(&ebu_lock, flags);
-+ while (len--)
-+ *t++ = *f++;
-+ spin_unlock_irqrestore(&ebu_lock, flags);
-+}
-+
-+static const char const *part_probe_types[] = { "cmdlinepart", NULL };
-+
-+static int __init
-+ltq_mtd_probe(struct platform_device *pdev)
-+{
-+ struct physmap_flash_data *ltq_mtd_data = dev_get_platdata(&pdev->dev);
-+ struct ltq_mtd *ltq_mtd;
-+ struct mtd_partition *parts;
-+ struct resource *res;
-+ int nr_parts = 0;
-+ struct cfi_private *cfi;
-+ int err;
-+
-+ ltq_mtd = kzalloc(sizeof(struct ltq_mtd), GFP_KERNEL);
-+ platform_set_drvdata(pdev, ltq_mtd);
-+
-+ ltq_mtd->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-+ if (!ltq_mtd->res) {
-+ dev_err(&pdev->dev, "failed to get memory resource");
-+ err = -ENOENT;
-+ goto err_out;
-+ }
-+
-+ res = devm_request_mem_region(&pdev->dev, ltq_mtd->res->start,
-+ resource_size(ltq_mtd->res), dev_name(&pdev->dev));
-+ if (!ltq_mtd->res) {
-+ dev_err(&pdev->dev, "failed to request mem resource");
-+ err = -EBUSY;
-+ goto err_out;
-+ }
-+
-+ ltq_mtd->map = kzalloc(sizeof(struct map_info), GFP_KERNEL);
-+ ltq_mtd->map->phys = res->start;
-+ ltq_mtd->map->size = resource_size(res);
-+ ltq_mtd->map->virt = devm_ioremap_nocache(&pdev->dev,
-+ ltq_mtd->map->phys, ltq_mtd->map->size);
-+ if (!ltq_mtd->map->virt) {
-+ dev_err(&pdev->dev, "failed to ioremap!\n");
-+ err = -ENOMEM;
-+ goto err_free;
-+ }
-+
-+ ltq_mtd->map->name = ltq_map_name;
-+ ltq_mtd->map->bankwidth = 2;
-+ ltq_mtd->map->read = ltq_read16;
-+ ltq_mtd->map->write = ltq_write16;
-+ ltq_mtd->map->copy_from = ltq_copy_from;
-+ ltq_mtd->map->copy_to = ltq_copy_to;
-+
-+ ltq_mtd->map->map_priv_1 = LTQ_NOR_PROBING;
-+ ltq_mtd->mtd = do_map_probe("cfi_probe", ltq_mtd->map);
-+ ltq_mtd->map->map_priv_1 = LTQ_NOR_NORMAL;
-+
-+ if (!ltq_mtd->mtd) {
-+ dev_err(&pdev->dev, "probing failed\n");
-+ err = -ENXIO;
-+ goto err_unmap;
-+ }
-+
-+ ltq_mtd->mtd->owner = THIS_MODULE;
-+
-+ cfi = ltq_mtd->map->fldrv_priv;
-+ cfi->addr_unlock1 ^= 1;
-+ cfi->addr_unlock2 ^= 1;
-+
-+ nr_parts = parse_mtd_partitions(ltq_mtd->mtd,
-+ part_probe_types, &parts, 0);
-+ if (nr_parts > 0) {
-+ dev_info(&pdev->dev,
-+ "using %d partitions from cmdline", nr_parts);
-+ } else {
-+ nr_parts = ltq_mtd_data->nr_parts;
-+ parts = ltq_mtd_data->parts;
-+ }
-+
-+ err = add_mtd_partitions(ltq_mtd->mtd, parts, nr_parts);
-+ if (err) {
-+ dev_err(&pdev->dev, "failed to add partitions\n");
-+ goto err_destroy;
-+ }
-+
-+ return 0;
-+
-+err_destroy:
-+ map_destroy(ltq_mtd->mtd);
-+err_unmap:
-+ iounmap(ltq_mtd->map->virt);
-+err_free:
-+ kfree(ltq_mtd->map);
-+err_out:
-+ kfree(ltq_mtd);
-+ return err;
-+}
-+
-+static int __devexit
-+ltq_mtd_remove(struct platform_device *pdev)
-+{
-+ struct ltq_mtd *ltq_mtd = platform_get_drvdata(pdev);
-+
-+ if (ltq_mtd) {
-+ if (ltq_mtd->mtd) {
-+ del_mtd_partitions(ltq_mtd->mtd);
-+ map_destroy(ltq_mtd->mtd);
-+ }
-+ if (ltq_mtd->map->virt)
-+ iounmap(ltq_mtd->map->virt);
-+ kfree(ltq_mtd->map);
-+ kfree(ltq_mtd);
-+ }
-+ return 0;
-+}
-+
-+static struct platform_driver ltq_mtd_driver = {
-+ .remove = __devexit_p(ltq_mtd_remove),
-+ .driver = {
-+ .name = "ltq_nor",
-+ .owner = THIS_MODULE,
-+ },
-+};
-+
-+static int __init
-+init_ltq_mtd(void)
-+{
-+ int ret = platform_driver_probe(&ltq_mtd_driver, ltq_mtd_probe);
-+
-+ if (ret)
-+ pr_err("ltq_nor: error registering platform driver");
-+ return ret;
-+}
-+
-+static void __exit
-+exit_ltq_mtd(void)
-+{
-+ platform_driver_unregister(&ltq_mtd_driver);
-+}
-+
-+module_init(init_ltq_mtd);
-+module_exit(exit_ltq_mtd);
-+
-+MODULE_LICENSE("GPL");
-+MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
-+MODULE_DESCRIPTION("Lantiq SoC NOR");
generated by cgit v1.2.3 (git 2.46.0) at 2024-12-25 19:15:24 +0000