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115 lines
2.7 KiB
115 lines
2.7 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Handle mapping of the NOR flash on implementa A7 boards |
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* |
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* Copyright 2002 SYSGO Real-Time Solutions GmbH |
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*/ |
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#include <linux/module.h> |
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#include <linux/types.h> |
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#include <linux/kernel.h> |
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#include <linux/init.h> |
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#include <asm/io.h> |
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#include <linux/mtd/mtd.h> |
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#include <linux/mtd/map.h> |
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#include <linux/mtd/partitions.h> |
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#define WINDOW_ADDR0 0x00000000 /* physical properties of flash */ |
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#define WINDOW_SIZE0 0x00800000 |
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#define WINDOW_ADDR1 0x10000000 /* physical properties of flash */ |
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#define WINDOW_SIZE1 0x00800000 |
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#define NUM_FLASHBANKS 2 |
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#define BUSWIDTH 4 |
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#define MSG_PREFIX "impA7:" /* prefix for our printk()'s */ |
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#define MTDID "impa7-%d" /* for mtdparts= partitioning */ |
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static struct mtd_info *impa7_mtd[NUM_FLASHBANKS]; |
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static const char * const rom_probe_types[] = { "jedec_probe", NULL }; |
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static struct map_info impa7_map[NUM_FLASHBANKS] = { |
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{ |
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.name = "impA7 NOR Flash Bank #0", |
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.size = WINDOW_SIZE0, |
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.bankwidth = BUSWIDTH, |
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}, |
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{ |
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.name = "impA7 NOR Flash Bank #1", |
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.size = WINDOW_SIZE1, |
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.bankwidth = BUSWIDTH, |
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}, |
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}; |
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/* |
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* MTD partitioning stuff |
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*/ |
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static const struct mtd_partition partitions[] = |
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{ |
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{ |
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.name = "FileSystem", |
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.size = 0x800000, |
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.offset = 0x00000000 |
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}, |
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}; |
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static int __init init_impa7(void) |
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{ |
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const char * const *type; |
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int i; |
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static struct { u_long addr; u_long size; } pt[NUM_FLASHBANKS] = { |
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{ WINDOW_ADDR0, WINDOW_SIZE0 }, |
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{ WINDOW_ADDR1, WINDOW_SIZE1 }, |
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}; |
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int devicesfound = 0; |
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for(i=0; i<NUM_FLASHBANKS; i++) |
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{ |
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printk(KERN_NOTICE MSG_PREFIX "probing 0x%08lx at 0x%08lx\n", |
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pt[i].size, pt[i].addr); |
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impa7_map[i].phys = pt[i].addr; |
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impa7_map[i].virt = ioremap(pt[i].addr, pt[i].size); |
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if (!impa7_map[i].virt) { |
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printk(MSG_PREFIX "failed to ioremap\n"); |
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return -EIO; |
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} |
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simple_map_init(&impa7_map[i]); |
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impa7_mtd[i] = NULL; |
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type = rom_probe_types; |
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for(; !impa7_mtd[i] && *type; type++) { |
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impa7_mtd[i] = do_map_probe(*type, &impa7_map[i]); |
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} |
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if (impa7_mtd[i]) { |
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impa7_mtd[i]->owner = THIS_MODULE; |
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devicesfound++; |
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mtd_device_register(impa7_mtd[i], partitions, |
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ARRAY_SIZE(partitions)); |
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} else { |
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iounmap((void __iomem *)impa7_map[i].virt); |
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} |
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} |
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return devicesfound == 0 ? -ENXIO : 0; |
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} |
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static void __exit cleanup_impa7(void) |
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{ |
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int i; |
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for (i=0; i<NUM_FLASHBANKS; i++) { |
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if (impa7_mtd[i]) { |
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mtd_device_unregister(impa7_mtd[i]); |
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map_destroy(impa7_mtd[i]); |
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iounmap((void __iomem *)impa7_map[i].virt); |
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impa7_map[i].virt = NULL; |
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} |
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} |
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} |
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module_init(init_impa7); |
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module_exit(cleanup_impa7); |
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MODULE_LICENSE("GPL"); |
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MODULE_AUTHOR("Pavel Bartusek <[email protected]>"); |
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MODULE_DESCRIPTION("MTD map driver for implementa impA7");
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