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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /drivers/mtd/maps/impa7.c | |
parent | Initial commit. (diff) | |
download | linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.tar.xz linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | drivers/mtd/maps/impa7.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/drivers/mtd/maps/impa7.c b/drivers/mtd/maps/impa7.c new file mode 100644 index 000000000..b41401852 --- /dev/null +++ b/drivers/mtd/maps/impa7.c @@ -0,0 +1,115 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Handle mapping of the NOR flash on implementa A7 boards + * + * Copyright 2002 SYSGO Real-Time Solutions GmbH + */ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <asm/io.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/map.h> +#include <linux/mtd/partitions.h> + +#define WINDOW_ADDR0 0x00000000 /* physical properties of flash */ +#define WINDOW_SIZE0 0x00800000 +#define WINDOW_ADDR1 0x10000000 /* physical properties of flash */ +#define WINDOW_SIZE1 0x00800000 +#define NUM_FLASHBANKS 2 +#define BUSWIDTH 4 + +#define MSG_PREFIX "impA7:" /* prefix for our printk()'s */ +#define MTDID "impa7-%d" /* for mtdparts= partitioning */ + +static struct mtd_info *impa7_mtd[NUM_FLASHBANKS]; + +static const char * const rom_probe_types[] = { "jedec_probe", NULL }; + +static struct map_info impa7_map[NUM_FLASHBANKS] = { + { + .name = "impA7 NOR Flash Bank #0", + .size = WINDOW_SIZE0, + .bankwidth = BUSWIDTH, + }, + { + .name = "impA7 NOR Flash Bank #1", + .size = WINDOW_SIZE1, + .bankwidth = BUSWIDTH, + }, +}; + +/* + * MTD partitioning stuff + */ +static const struct mtd_partition partitions[] = +{ + { + .name = "FileSystem", + .size = 0x800000, + .offset = 0x00000000 + }, +}; + +static int __init init_impa7(void) +{ + const char * const *type; + int i; + static struct { u_long addr; u_long size; } pt[NUM_FLASHBANKS] = { + { WINDOW_ADDR0, WINDOW_SIZE0 }, + { WINDOW_ADDR1, WINDOW_SIZE1 }, + }; + int devicesfound = 0; + + for(i=0; i<NUM_FLASHBANKS; i++) + { + printk(KERN_NOTICE MSG_PREFIX "probing 0x%08lx at 0x%08lx\n", + pt[i].size, pt[i].addr); + + impa7_map[i].phys = pt[i].addr; + impa7_map[i].virt = ioremap(pt[i].addr, pt[i].size); + if (!impa7_map[i].virt) { + printk(MSG_PREFIX "failed to ioremap\n"); + return -EIO; + } + simple_map_init(&impa7_map[i]); + + impa7_mtd[i] = NULL; + type = rom_probe_types; + for(; !impa7_mtd[i] && *type; type++) { + impa7_mtd[i] = do_map_probe(*type, &impa7_map[i]); + } + + if (impa7_mtd[i]) { + impa7_mtd[i]->owner = THIS_MODULE; + devicesfound++; + mtd_device_register(impa7_mtd[i], partitions, + ARRAY_SIZE(partitions)); + } else { + iounmap((void __iomem *)impa7_map[i].virt); + } + } + return devicesfound == 0 ? -ENXIO : 0; +} + +static void __exit cleanup_impa7(void) +{ + int i; + for (i=0; i<NUM_FLASHBANKS; i++) { + if (impa7_mtd[i]) { + mtd_device_unregister(impa7_mtd[i]); + map_destroy(impa7_mtd[i]); + iounmap((void __iomem *)impa7_map[i].virt); + impa7_map[i].virt = NULL; + } + } +} + +module_init(init_impa7); +module_exit(cleanup_impa7); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Pavel Bartusek <pba@sysgo.de>"); +MODULE_DESCRIPTION("MTD map driver for implementa impA7"); |