-#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>
#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);
}
-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);
+
+ /* 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;
+}
+
+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);
- add_mtd_partitions(&rmtd, partition_info, 2);
- init_ok = 1;
- return 0;
+ return 0;
}
-module_init(rbmips_init);
+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");
projects / openwrt / svn-archive / archive.git / commitdiff