+++ /dev/null
-/*==============================================================================*/
-/* rbmipsnand.c */
-/* This module is derived from the 2.4 driver shipped by Microtik for their */
-/* Routerboard 1xx and 5xx series boards. It provides support for the built in */
-/* NAND flash on the Routerboard 1xx series boards for Linux 2.6.19+. */
-/* Licence: Original Microtik code seems not to have a licence. */
-/* Rewritten code all GPL V2. */
-/* Copyright(C) 2007 david.goodenough@linkchoose.co.uk (for rewriten code) */
-/*==============================================================================*/
-
-#include <linux/init.h>
-#include <linux/mtd/nand.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/partitions.h>
-#include <linux/delay.h>
-
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/bootinfo.h>
-#include <asm/mach-adm5120/adm5120_info.h>
-#include <asm/mach-adm5120/adm5120_defs.h>
-
-#define SMEM1(x) (*((volatile unsigned char *) (KSEG1ADDR(ADM5120_SRAM1_BASE) + x)))
-
-#define NAND_RW_REG 0x0 //data register
-#define NAND_SET_CEn 0x1 //CE# low
-#define NAND_CLR_CEn 0x2 //CE# high
-#define NAND_CLR_CLE 0x3 //CLE low
-#define NAND_SET_CLE 0x4 //CLE high
-#define NAND_CLR_ALE 0x5 //ALE low
-#define NAND_SET_ALE 0x6 //ALE high
-#define NAND_SET_SPn 0x7 //SP# low (use spare area)
-#define NAND_CLR_SPn 0x8 //SP# high (do not use spare area)
-#define NAND_SET_WPn 0x9 //WP# low
-#define NAND_CLR_WPn 0xA //WP# high
-#define NAND_STS_REG 0xB //Status register
-
-#define MEM32(x) *((volatile unsigned *) (x))
-static void __iomem *p_nand;
-
-static int rb100_dev_ready(struct mtd_info *mtd) {
- return SMEM1(NAND_STS_REG) & 0x80;
-}
-
-static void rbmips_hwcontrol100(struct mtd_info *mtd, int cmd, unsigned int ctrl) {
- struct nand_chip *chip = mtd->priv;
- if (ctrl & NAND_CTRL_CHANGE) {
- SMEM1((( ctrl & NAND_CLE) ? NAND_SET_CLE : NAND_CLR_CLE)) = 0x01;
- SMEM1((( ctrl & NAND_ALE) ? NAND_SET_ALE : NAND_CLR_ALE)) = 0x01;
- SMEM1((( ctrl & NAND_NCE) ? NAND_SET_CEn : NAND_CLR_CEn)) = 0x01;
- }
- if( cmd != NAND_CMD_NONE)
- writeb( cmd, chip->IO_ADDR_W);
-}
-
-static struct mtd_partition partition_info[] = {
- {
- name: "RouterBoard NAND Boot",
- offset: 0,
- size: 4 * 1024 * 1024
- },
- {
- name: "rootfs",
- offset: MTDPART_OFS_NXTBLK,
- size: MTDPART_SIZ_FULL
- }
-};
-
-static struct mtd_info rmtd;
-static struct nand_chip rnand;
-/*========================================================================*/
-/* We need to use the OLD Yaffs-1 OOB layout, otherwise the RB bootloader */
-/* will not be able to find the kernel that we load. So set the oobinfo */
-/* when creating the partitions. */
-/*========================================================================*/
-static struct nand_ecclayout rb_ecclayout = {
- .eccbytes = 6,
- .eccpos = { 8, 9, 10, 13, 14, 15 },
- .oobavail = 9,
- .oobfree = { { 0, 4 }, { 6, 2 }, { 11, 2 }, { 4, 1} }
-};
-static unsigned init_ok = 0;
-
-unsigned get_rbnand_block_size(void) {
- return init_ok ? rmtd.writesize : 0;
-}
-
-EXPORT_SYMBOL(get_rbnand_block_size);
-
-int __init rbmips_init(void) {
-
- if (!adm5120_nand_boot)
- return -ENODEV;
-
- memset(&rmtd, 0, sizeof(rmtd));
- memset(&rnand, 0, sizeof(rnand));
- printk(KERN_INFO "RB1xx nand\n");
- MEM32(0xB2000064) = 0x100;
- MEM32(0xB2000008) = 0x1;
- SMEM1(NAND_SET_SPn) = 0x01;
- SMEM1(NAND_CLR_WPn) = 0x01;
- rnand.IO_ADDR_R = (unsigned char *)KSEG1ADDR(ADM5120_SRAM1_BASE);
- rnand.IO_ADDR_W = rnand.IO_ADDR_R;
- rnand.cmd_ctrl = rbmips_hwcontrol100;
- rnand.dev_ready = rb100_dev_ready;
- p_nand = (void __iomem *)ioremap(( unsigned long)ADM5120_SRAM1_BASE, 0x1000);
- if (!p_nand) {
- printk(KERN_WARNING "RB1xx nand Unable ioremap buffer\n");
- return -ENXIO;
- }
- rnand.ecc.mode = NAND_ECC_SOFT;
- rnand.ecc.layout = &rb_ecclayout;
- rnand.chip_delay = 25;
- rnand.options |= NAND_NO_AUTOINCR;
- rmtd.priv = &rnand;
- if (nand_scan(&rmtd, 1) && nand_scan(&rmtd, 1)
- && nand_scan(&rmtd, 1) && nand_scan(&rmtd, 1)) {
- printk(KERN_INFO "RB1xxx nand device not found\n");
- iounmap ((void *)p_nand);
- return -ENXIO;
- }
- add_mtd_partitions(&rmtd, partition_info, 2);
- init_ok = 1;
- return 0;
-}
-
-module_init(rbmips_init);
-