^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Handle mapping of the NOR flash on implementa A7 boards
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright 2002 SYSGO Real-Time Solutions GmbH
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/mtd/mtd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/mtd/map.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/mtd/partitions.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define WINDOW_ADDR0 0x00000000 /* physical properties of flash */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define WINDOW_SIZE0 0x00800000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define WINDOW_ADDR1 0x10000000 /* physical properties of flash */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define WINDOW_SIZE1 0x00800000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define NUM_FLASHBANKS 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define BUSWIDTH 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define MSG_PREFIX "impA7:" /* prefix for our printk()'s */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define MTDID "impa7-%d" /* for mtdparts= partitioning */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) static struct mtd_info *impa7_mtd[NUM_FLASHBANKS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static const char * const rom_probe_types[] = { "jedec_probe", NULL };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static struct map_info impa7_map[NUM_FLASHBANKS] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) .name = "impA7 NOR Flash Bank #0",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) .size = WINDOW_SIZE0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) .bankwidth = BUSWIDTH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) .name = "impA7 NOR Flash Bank #1",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) .size = WINDOW_SIZE1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) .bankwidth = BUSWIDTH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * MTD partitioning stuff
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) static const struct mtd_partition partitions[] =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) .name = "FileSystem",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) .size = 0x800000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) .offset = 0x00000000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) static int __init init_impa7(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) const char * const *type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static struct { u_long addr; u_long size; } pt[NUM_FLASHBANKS] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) { WINDOW_ADDR0, WINDOW_SIZE0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) { WINDOW_ADDR1, WINDOW_SIZE1 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) int devicesfound = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) for(i=0; i<NUM_FLASHBANKS; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) printk(KERN_NOTICE MSG_PREFIX "probing 0x%08lx at 0x%08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) pt[i].size, pt[i].addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) impa7_map[i].phys = pt[i].addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) impa7_map[i].virt = ioremap(pt[i].addr, pt[i].size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) if (!impa7_map[i].virt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) printk(MSG_PREFIX "failed to ioremap\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) simple_map_init(&impa7_map[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) impa7_mtd[i] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) type = rom_probe_types;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) for(; !impa7_mtd[i] && *type; type++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) impa7_mtd[i] = do_map_probe(*type, &impa7_map[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) if (impa7_mtd[i]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) impa7_mtd[i]->owner = THIS_MODULE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) devicesfound++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) mtd_device_register(impa7_mtd[i], partitions,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) ARRAY_SIZE(partitions));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) iounmap((void __iomem *)impa7_map[i].virt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) return devicesfound == 0 ? -ENXIO : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) static void __exit cleanup_impa7(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) for (i=0; i<NUM_FLASHBANKS; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) if (impa7_mtd[i]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) mtd_device_unregister(impa7_mtd[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) map_destroy(impa7_mtd[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) iounmap((void __iomem *)impa7_map[i].virt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) impa7_map[i].virt = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) module_init(init_impa7);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) module_exit(cleanup_impa7);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) MODULE_AUTHOR("Pavel Bartusek <pba@sysgo.de>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) MODULE_DESCRIPTION("MTD map driver for implementa impA7");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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