From 85f88ca4beafa8d00a073ab5430f53c891eac0ed Mon Sep 17 00:00:00 2001
From: Florian Fainelli <florian@openwrt.org>
Date: Wed, 18 Jul 2007 17:16:36 +0000
Subject: Convert the nand driver to a platform_device, should only allow
routerboards to use it
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@8045 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
.../files/arch/mips/adm5120/boards/mikrotik.c | 1 +
.../adm5120-2.6/files/arch/mips/adm5120/platform.c | 19 +++
.../files/drivers/mtd/nand/rbmipsnand.c | 190 +++++++++++++++------
.../asm-mips/mach-adm5120/adm5120_platform.h | 8 +
4 files changed, 162 insertions(+), 56 deletions(-)
(limited to 'target')
diff --git a/target/linux/adm5120-2.6/files/arch/mips/adm5120/boards/mikrotik.c b/target/linux/adm5120-2.6/files/arch/mips/adm5120/boards/mikrotik.c
index 7ced1f196c..fccb284d6c 100644
--- a/target/linux/adm5120-2.6/files/arch/mips/adm5120/boards/mikrotik.c
+++ b/target/linux/adm5120-2.6/files/arch/mips/adm5120/boards/mikrotik.c
@@ -47,6 +47,7 @@ static struct mtd_partition rb1xx_partitions[] = {
static struct platform_device *rb1xx_devices[] __initdata = {
&adm5120_flash0_device,
+ &adm5120_nand_device,
};
static void __init rb1xx_setup(void)
diff --git a/target/linux/adm5120-2.6/files/arch/mips/adm5120/platform.c b/target/linux/adm5120-2.6/files/arch/mips/adm5120/platform.c
index 8fd89ae7c7..44598825d9 100644
--- a/target/linux/adm5120-2.6/files/arch/mips/adm5120/platform.c
+++ b/target/linux/adm5120-2.6/files/arch/mips/adm5120/platform.c
@@ -109,3 +109,22 @@ struct platform_device adm5120_flash1_device = {
.id = 1,
.dev.platform_data = &adm5120_flash1_data,
};
+
+/* NAND flash */
+struct resource adm5120_nand_resource[] = {
+ [0] = {
+ .start = ADM5120_SRAM1_BASE,
+ .end = ADM5120_SRAM1_BASE+0x1000-1,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+struct adm5120_nand_platform_data adm5120_nand_data;
+
+struct platform_device adm5120_nand_device = {
+ .name = "adm5120-nand",
+ .id = -1,
+ .dev.platform_data = &adm5120_nand_data,
+ .num_resources = ARRAY_SIZE(adm5120_nand_resource),
+ .resource = adm5120_nand_resource,
+};
diff --git a/target/linux/adm5120-2.6/files/drivers/mtd/nand/rbmipsnand.c b/target/linux/adm5120-2.6/files/drivers/mtd/nand/rbmipsnand.c
index 5b98833c06..9e6ae1b577 100644
--- a/target/linux/adm5120-2.6/files/drivers/mtd/nand/rbmipsnand.c
+++ b/target/linux/adm5120-2.6/files/drivers/mtd/nand/rbmipsnand.c
@@ -8,7 +8,9 @@
/* Copyright(C) 2007 david.goodenough@linkchoose.co.uk (for rewriten code) */
/*==============================================================================*/
-#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
@@ -36,93 +38,169 @@
#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
+ size: 4 * 1024 * 1024
},
{
name: "rootfs",
- offset: MTDPART_OFS_NXTBLK,
- size: MTDPART_SIZ_FULL
+ 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,
+ .oobavail = 9,
.oobfree = { { 0, 4 }, { 6, 2 }, { 11, 2 }, { 4, 1} }
};
+
+struct adm5120_nand_info {
+ struct nand_chip chip;
+ struct mtd_info mtd;
+ void __iomem *io_base;
+#ifdef CONFIG_MTD_PARTITIONS
+ int nr_parts;
+ struct mtd_partition *parts;
+#endif
+};
+
+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);
+}
+
+/*========================================================================*/
+/* 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 unsigned init_ok = 0;
-unsigned get_rbnand_block_size(void) {
- return init_ok ? rmtd.writesize : 0;
+unsigned get_rbnand_block_size(struct adm5120_nand_info *data)
+{
+ return init_ok ? data->mtd.writesize : 0;
}
EXPORT_SYMBOL(get_rbnand_block_size);
-int __init rbmips_init(void) {
+static int rbmips_probe(struct platform_device *pdev)
+{
+ struct adm5120_nand_info *data;
+ int res = 0;
+
+ /* Allocate memory for the nand_chip structure */
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data) {
+ dev_err(&pdev->dev, "Failed to allocate device structure\n");
+ return -ENOMEM;
+
+ }
+
+ data->io_base = ioremap(pdev->resource[0].start, 0x1000);
- if (!adm5120_nand_boot)
- return -ENODEV;
+ if (data->io_base == NULL) {
+ dev_err(&pdev->dev, "ioremap failed\n");
+ kfree(data);
+ return -EIO;
+ }
- 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)) {
+
+ data->chip.priv = &data;
+ data->mtd.priv = &data->chip;
+ data->mtd.owner = THIS_MODULE;
+
+ data->chip.IO_ADDR_R = (unsigned char *)KSEG1ADDR(ADM5120_SRAM1_BASE);
+ data->chip.IO_ADDR_W = data->chip.IO_ADDR_R;
+ data->chip.cmd_ctrl = rbmips_hwcontrol100;
+ data->chip.dev_ready = rb100_dev_ready;
+ data->chip.ecc.mode = NAND_ECC_SOFT;
+ data->chip.ecc.layout = &rb_ecclayout;
+ data->chip.chip_delay = 25;
+ data->chip.options |= NAND_NO_AUTOINCR;
+
+ platform_set_drvdata(pdev, data);
+
+ /* Why do we need to scan 4 times ? */
+ if (nand_scan(&data->mtd, 1) && nand_scan(&data->mtd, 1) && nand_scan(&data->mtd, 1) && nand_scan(&data->mtd, 1)) {
printk(KERN_INFO "RB1xxx nand device not found\n");
- iounmap ((void *)p_nand);
- return -ENXIO;
+ res = -ENXIO;
+ goto out;
}
- add_mtd_partitions(&rmtd, partition_info, 2);
+
+ add_mtd_partitions(&data->mtd, partition_info, 2);
init_ok = 1;
+
+ res = add_mtd_device(&data->mtd);
+ if (!res)
+ return res;
+
+ nand_release(&data->mtd);
+out:
+ platform_set_drvdata(pdev, NULL);
+ iounmap(data->io_base);
+ kfree(data);
+ return res;
+}
+
+static int __devexit rbmips_remove(struct platform_device *pdev)
+{
+ struct adm5120_nand_info *data = platform_get_drvdata(pdev);
+
+ nand_release(&data->mtd);
+ iounmap(data->io_base);
+ kfree(data);
+
return 0;
}
-module_init(rbmips_init);
+static struct platform_driver adm5120_nand_driver = {
+ .probe = rbmips_probe,
+ .remove = rbmips_remove,
+ .driver = {
+ .name = "adm5120-nand",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init adm5120_nand_init(void)
+{
+ int err;
+ err = platform_driver_register(&adm5120_nand_driver);
+ return err;
+}
+
+static void __exit adm5120_nand_exit(void)
+{
+ platform_driver_unregister(&adm5120_nand_driver);
+}
+
+module_init(adm5120_nand_init);
+module_exit(adm5120_nand_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("David Goodenough, Florian Fainelli");
+MODULE_DESCRIPTION("RouterBOARD 100 NAND driver");
diff --git a/target/linux/adm5120-2.6/files/include/asm-mips/mach-adm5120/adm5120_platform.h b/target/linux/adm5120-2.6/files/include/asm-mips/mach-adm5120/adm5120_platform.h
index b9822983c7..e63611912a 100644
--- a/target/linux/adm5120-2.6/files/include/asm-mips/mach-adm5120/adm5120_platform.h
+++ b/target/linux/adm5120-2.6/files/include/asm-mips/mach-adm5120/adm5120_platform.h
@@ -32,8 +32,14 @@
struct adm5120_flash_platform_data {
void (*set_vpp)(struct map_info *, int);
void (*switch_bank)(unsigned);
+#ifdef CONFIG_MTD_PARTITIONS
unsigned int nr_parts;
struct mtd_partition *parts;
+#endif
+};
+
+struct adm5120_nand_platform_data {
+ /* TODO : not yet implemented */
};
struct adm5120_switch_platform_data {
@@ -54,11 +60,13 @@ struct adm5120_pci_platform_data {
extern struct adm5120_flash_platform_data adm5120_flash0_data;
extern struct adm5120_flash_platform_data adm5120_flash1_data;
+extern struct adm5120_nand_platform_data adm5120_nand_data;
extern struct adm5120_pci_platform_data adm5120_pci_data;
extern struct adm5120_switch_platform_data adm5120_switch_data;
extern struct platform_device adm5120_flash0_device;
extern struct platform_device adm5120_flash1_device;
+extern struct platform_device adm5120_nand_device;
extern struct platform_device adm5120_usbc_device;
extern struct platform_device adm5120_pci_device;
extern struct platform_device adm5120_switch_device;
--
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