SVN-Revision: 6991master
Florian Fainelli
18 years ago
parent
29300267d3
commit
d22c77b808
@ -0,0 +1,111 @@ |
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/*==============================================================================*/ |
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/* rbmipsnand.c */ |
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/* This module is derived from the 2.4 driver shipped by Microtik for their */ |
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/* Routerboard 1xx and 5xx series boards. It provides support for the built in */ |
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/* NAND flash on the Routerboard 1xx series boards for Linux 2.6.19+. */ |
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/* Licence: Original Microtik code seems not to have a licence. */ |
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/* Rewritten code all GPL V2. */ |
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/* Copyright(C) 2007 david.goodenough@linkchoose.co.uk (for rewriten code) */ |
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/*==============================================================================*/ |
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#include <linux/init.h> |
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#include <linux/mtd/nand.h> |
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#include <linux/mtd/mtd.h> |
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#include <linux/mtd/partitions.h> |
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#include <linux/delay.h> |
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#include <asm/io.h> |
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#include <asm/irq.h> |
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#include <asm/bootinfo.h> |
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#define SMEM1_BASE 0x10000000 // from ADM5120 documentation
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#define SMEM1(x) (*((volatile unsigned char *) (KSEG1ADDR(SMEM1_BASE) + x))) |
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#define NAND_RW_REG 0x0 //data register
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#define NAND_SET_CEn 0x1 //CE# low
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#define NAND_CLR_CEn 0x2 //CE# high
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#define NAND_CLR_CLE 0x3 //CLE low
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#define NAND_SET_CLE 0x4 //CLE high
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#define NAND_CLR_ALE 0x5 //ALE low
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#define NAND_SET_ALE 0x6 //ALE high
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#define NAND_SET_SPn 0x7 //SP# low (use spare area)
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#define NAND_CLR_SPn 0x8 //SP# high (do not use spare area)
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#define NAND_SET_WPn 0x9 //WP# low
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#define NAND_CLR_WPn 0xA //WP# high
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#define NAND_STS_REG 0xB //Status register
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#define MEM32(x) *((volatile unsigned *) (x)) |
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static void __iomem *p_nand; |
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static int rb100_dev_ready(struct mtd_info *mtd) { |
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return SMEM1(NAND_STS_REG) & 0x80; |
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} |
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static void rbmips_hwcontrol100(struct mtd_info *mtd, int cmd, unsigned int ctrl) { |
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struct nand_chip *chip = mtd->priv; |
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if (ctrl & NAND_CTRL_CHANGE) { |
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SMEM1((( ctrl & NAND_CLE) ? NAND_SET_CLE : NAND_CLR_CLE)) = 0x01; |
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SMEM1((( ctrl & NAND_ALE) ? NAND_SET_ALE : NAND_CLR_ALE)) = 0x01; |
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SMEM1((( ctrl & NAND_NCE) ? NAND_SET_CEn : NAND_CLR_CEn)) = 0x01; |
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} |
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if( cmd != NAND_CMD_NONE) |
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writeb( cmd, chip->IO_ADDR_W); |
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} |
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static struct mtd_partition partition_info[] = { |
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{ |
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name: "RouterBoard NAND Boot", |
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offset: 0, |
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size: 4 * 1024 * 1024 |
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}, |
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{ |
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name: "RouterBoard NAND Main", |
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offset: MTDPART_OFS_NXTBLK, |
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size: MTDPART_SIZ_FULL |
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} |
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}; |
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static struct mtd_info rmtd; |
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static struct nand_chip rnand; |
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static unsigned init_ok = 0; |
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unsigned get_rbnand_block_size(void) { |
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return init_ok ? rmtd.writesize : 0; |
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} |
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EXPORT_SYMBOL(get_rbnand_block_size); |
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int __init rbmips_init(void) { |
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memset(&rmtd, 0, sizeof(rmtd)); |
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memset(&rnand, 0, sizeof(rnand)); |
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printk("RB1xx nand\n"); |
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MEM32(0xB2000064) = 0x100; |
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MEM32(0xB2000008) = 0x1; |
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SMEM1(NAND_SET_SPn) = 0x01; |
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SMEM1(NAND_CLR_WPn) = 0x01; |
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rnand.IO_ADDR_R = (unsigned char *)KSEG1ADDR(SMEM1_BASE); |
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rnand.IO_ADDR_W = rnand.IO_ADDR_R; |
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rnand.cmd_ctrl = rbmips_hwcontrol100; |
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rnand.dev_ready = rb100_dev_ready; |
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p_nand = (void __iomem *)ioremap(( unsigned long)SMEM1_BASE, 0x1000); |
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if (!p_nand) { |
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printk("RB1xx nand Unable ioremap buffer"); |
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return -ENXIO; |
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} |
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rnand.ecc.mode = NAND_ECC_SOFT; |
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rnand.chip_delay = 25; |
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rnand.options |= NAND_NO_AUTOINCR; |
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rmtd.priv = &rnand; |
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if (nand_scan(&rmtd, 1) && nand_scan(&rmtd, 1) |
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&& nand_scan(&rmtd, 1) && nand_scan(&rmtd, 1)) { |
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printk("RB1xxx nand device not found"); |
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iounmap ((void *)p_nand); |
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return -ENXIO; |
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} |
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add_mtd_partitions(&rmtd, partition_info, 2); |
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init_ok = 1; |
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return 0; |
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} |
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module_init(rbmips_init); |
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@ -0,0 +1,29 @@ |
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diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
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index cfe288a..c528024 100644
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--- a/drivers/mtd/nand/Kconfig
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+++ b/drivers/mtd/nand/Kconfig
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@@ -55,6 +55,12 @@ config MTD_NAND_TOTO
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help
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Support for NAND flash on Texas Instruments Toto platform.
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+config MTD_NAND_RB100
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+ tristate "NAND Flash device on RB100 board"
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+ depends on MTD_NAND
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+ help
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+ Support for NAND flash on RB100 platform.
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+
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config MTD_NAND_IDS
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tristate
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diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
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index 4174202..2be57c1 100644
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--- a/drivers/mtd/nand/Makefile
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+++ b/drivers/mtd/nand/Makefile
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@@ -8,6 +8,7 @@ obj-$(CONFIG_MTD_NAND_IDS) += nand_ids.
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obj-$(CONFIG_MTD_NAND_SPIA) += spia.o
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obj-$(CONFIG_MTD_NAND_TOTO) += toto.o
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+obj-$(CONFIG_MTD_NAND_RB100) += rbmipsnand.o
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obj-$(CONFIG_MTD_NAND_AUTCPU12) += autcpu12.o
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obj-$(CONFIG_MTD_NAND_EDB7312) += edb7312.o
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obj-$(CONFIG_MTD_NAND_AU1550) += au1550nd.o
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