Convert the NAND driver to platform_driver, allow tgz image to be built correctly

SVN-Revision: 8058
This commit is contained in:
Florian Fainelli 2007-07-19 14:53:24 +00:00
parent 90e990be2b
commit cfddec3e1d
3 changed files with 136 additions and 52 deletions

View File

@ -128,6 +128,8 @@ static struct platform_device cf_slot0 = {
static struct resource nand_slot0_res[] = {
{
.name = "nand_membase",
.start = 0x18a20000,
.end = (0x18a20000+0x1000)-1,
.flags = IORESOURCE_MEM
}
};

View File

@ -1,8 +1,11 @@
#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>
#include <linux/delay.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/bootinfo.h>
@ -29,7 +32,30 @@
#define LO_ULED (1 << 7)
#define MEM32(x) *((volatile unsigned *) (x))
static void __iomem *p_nand;
struct rb500_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
int init_ok;
int flags1;
int flags2;
};
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}
};
extern void changeLatchU5(unsigned char orMask, unsigned char nandMask);
@ -66,72 +92,121 @@ static void rbmips_hwcontrol500(struct mtd_info *mtd, int cmd,
}
static struct mtd_partition partition_info[] = {
{
name:"RouterBoard NAND Boot",
offset:0,
size:4 * 1024 * 1024},
{
name:"RouterBoard NAND Main",
offset:MTDPART_OFS_NXTBLK,
size:MTDPART_SIZ_FULL}
};
static struct mtd_info rmtd;
static struct nand_chip rnand;
static unsigned init_ok = 0;
unsigned get_rbnand_block_size(void)
unsigned get_rbnand_block_size(struct rb500_nand_info *data)
{
if (init_ok)
return rmtd.writesize;
if (data->init_ok)
return data->mtd.writesize;
else
return 0;
}
EXPORT_SYMBOL(get_rbnand_block_size);
int __init rbmips_init(void)
static int rbmips_probe(struct platform_device *pdev)
{
struct rb500_nand_info *data;
int res = 0;
int *b;
memset(&rmtd, 0, sizeof(rmtd));
memset(&rnand, 0, sizeof(rnand));
printk("RB500 nand\n");
changeLatchU5(LO_FOFF | LO_CEX,
LO_ULED | LO_ALE | LO_CLE | LO_WPX);
rnand.cmd_ctrl = rbmips_hwcontrol500;
rnand.dev_ready = rb500_dev_ready;
rnand.IO_ADDR_W = (unsigned char *)
KSEG1ADDR(MEM32(IDT434_REG_BASE + DEV2BASE));
rnand.IO_ADDR_R = rnand.IO_ADDR_W;
p_nand = (void __iomem *) ioremap((void *) 0x18a20000, 0x1000);
if (!p_nand) {
printk("RBnand Unable ioremap buffer");
return -ENXIO;
/* Allocate memory for the structure */
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data) {
dev_err(&pdev->dev, "Failed to allocate device structure\n");
return -ENOMEM;
}
rnand.ecc.mode = NAND_ECC_SOFT;
rnand.chip_delay = 25;
rnand.options |= NAND_NO_AUTOINCR;
rmtd.priv = &rnand;
data->io_base = ioremap(pdev->resource[0].start, pdev->resource[0].end - pdev->resource[0].start + 1);
if (data->io_base == NULL) {
dev_err(&pdev->dev, "ioremap failed\n");
kfree(data);
return -EIO;
}
/* FIXME : this seems to work only for newer RB500, check the version to set the right flags accordingly */
data->flags1 = LO_FOFF | LO_CEX;
data->flags2 = LO_ULED | LO_ALE | LO_CLE | LO_WPX;
changeLatchU5(data->flags1, data->flags2);
data->chip.cmd_ctrl = rbmips_hwcontrol500;
data->chip.dev_ready = rb500_dev_ready;
data->chip.IO_ADDR_W = (unsigned char *)KSEG1ADDR(MEM32(IDT434_REG_BASE + DEV2BASE));
data->chip.IO_ADDR_R = data->chip.IO_ADDR_W;
data->chip.ecc.mode = NAND_ECC_SOFT;
data->chip.chip_delay = 25;
data->chip.options |= NAND_NO_AUTOINCR;
data->chip.priv = &data;
data->mtd.priv = &data->chip;
data->mtd.owner = THIS_MODULE;
b = (int *) KSEG1ADDR(0x18010020);
printk("dev2base 0x%08x mask 0x%08x c 0x%08x tc 0x%08x\n", b[0],
b[1], b[2], b[3]);
if (nand_scan(&rmtd, 1) && nand_scan(&rmtd, 1)
&& nand_scan(&rmtd, 1) && nand_scan(&rmtd, 1)) {
printk("RBxxx nand device not found\n");
iounmap((void *) p_nand);
return -ENXIO;
}
platform_set_drvdata(pdev, data);
add_mtd_partitions(&rmtd, partition_info, 2);
init_ok = 1;
return 0;
/* 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 "RB500 nand device not found\n");
res = -ENXIO;
goto out;
}
printk(KERN_INFO "RB500 NAND\n");
add_mtd_partitions(&data->mtd, partition_info, 2);
data->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;
}
module_init(rbmips_init);
static int __devexit rbmips_remove(struct platform_device *pdev)
{
struct rb500_nand_info *data = platform_get_drvdata(pdev);
nand_release(&data->mtd);
iounmap(data->io_base);
kfree(data);
return 0;
}
static struct platform_driver rb500_nand_driver = {
.probe = rbmips_probe,
.remove = rbmips_remove,
.driver = {
.name = "rb500-nand",
.owner = THIS_MODULE,
},
};
static int __init rb500_nand_init(void)
{
int err;
err = platform_driver_register(&rb500_nand_driver);
return err;
}
static void __exit rb500_nand_exit(void)
{
platform_driver_unregister(&rb500_nand_driver);
}
module_init(rb500_nand_init);
module_exit(rb500_nand_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("David Goodenough, Felix Fietkau, Florian Fainelli");
MODULE_DESCRIPTION("RouterBOARD 500 NAND driver");

View File

@ -49,9 +49,16 @@ define Image/cmdline/squashfs
block2mtd.block2mtd=/dev/cfa2,65536 root=/dev/mtdblock0 rootfstype=squashfs init=/etc/preinit
endef
# TGZ images should be used with a yaffs2 rootfs
define Image/cmdline/tgz
root=/dev/mtdblock1 rootfstype=yaffs2 init=/etc/preinit
endef
define Image/Build
$(STAGING_DIR)/bin/patch-cmdline $(KDIR)/vmlinux.elf '$(strip $(call Image/cmdline/$(1))) '
ifneq ($(1),tgz)
./gen_image.sh $(BIN_DIR)/openwrt-$(BOARD)-$(KERNEL)-$(1).bin 4 $(KDIR)/vmlinux.elf $(CONFIG_TARGET_ROOTFS_FSPART) $(KDIR)/root.$(1)
endif
endef
$(eval $(call BuildImage))