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@@ -8,7 +8,9 @@
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/* Copyright(C) 2007 [email protected] (for rewriten code) */
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/*==============================================================================*/
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-#include <linux/init.h>
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+#include <linux/io.h>
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+#include <linux/module.h>
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+#include <linux/platform_device.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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@@ -36,93 +38,169 @@
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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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-
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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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-
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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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+ size: 4 * 1024 * 1024
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},
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{
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name: "rootfs",
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- offset: MTDPART_OFS_NXTBLK,
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- size: MTDPART_SIZ_FULL
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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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-/*========================================================================*/
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-/* We need to use the OLD Yaffs-1 OOB layout, otherwise the RB bootloader */
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-/* will not be able to find the kernel that we load. So set the oobinfo */
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-/* when creating the partitions. */
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-/*========================================================================*/
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static struct nand_ecclayout rb_ecclayout = {
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.eccbytes = 6,
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.eccpos = { 8, 9, 10, 13, 14, 15 },
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- .oobavail = 9,
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+ .oobavail = 9,
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.oobfree = { { 0, 4 }, { 6, 2 }, { 11, 2 }, { 4, 1} }
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};
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+
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+struct adm5120_nand_info {
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+ struct nand_chip chip;
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+ struct mtd_info mtd;
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+ void __iomem *io_base;
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+#ifdef CONFIG_MTD_PARTITIONS
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+ int nr_parts;
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+ struct mtd_partition *parts;
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+#endif
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+};
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+
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+static int rb100_dev_ready(struct mtd_info *mtd)
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+{
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+ return SMEM1(NAND_STS_REG) & 0x80;
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+}
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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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+{
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+ struct nand_chip *chip = mtd->priv;
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+ if (ctrl & NAND_CTRL_CHANGE)
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+ {
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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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+
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+/*========================================================================*/
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+/* We need to use the OLD Yaffs-1 OOB layout, otherwise the RB bootloader */
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+/* will not be able to find the kernel that we load. So set the oobinfo */
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+/* when creating the partitions. */
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+/*========================================================================*/
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+
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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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+unsigned get_rbnand_block_size(struct adm5120_nand_info *data)
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+{
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+ return init_ok ? data->mtd.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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+static int rbmips_probe(struct platform_device *pdev)
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+{
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+ struct adm5120_nand_info *data;
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+ int res = 0;
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+
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+ /* Allocate memory for the nand_chip structure */
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+ data = kzalloc(sizeof(*data), GFP_KERNEL);
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+ if (!data) {
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+ dev_err(&pdev->dev, "Failed to allocate device structure\n");
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+ return -ENOMEM;
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+
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+ }
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+
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+ data->io_base = ioremap(pdev->resource[0].start, 0x1000);
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- if (!adm5120_nand_boot)
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- return -ENODEV;
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+ if (data->io_base == NULL) {
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+ dev_err(&pdev->dev, "ioremap failed\n");
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+ kfree(data);
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+ return -EIO;
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+ }
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- memset(&rmtd, 0, sizeof(rmtd));
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- memset(&rnand, 0, sizeof(rnand));
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- printk(KERN_INFO "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(ADM5120_SRAM1_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)ADM5120_SRAM1_BASE, 0x1000);
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- if (!p_nand) {
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- printk(KERN_WARNING "RB1xx nand Unable ioremap buffer\n");
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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.ecc.layout = &rb_ecclayout;
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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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+
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+ data->chip.priv = &data;
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+ data->mtd.priv = &data->chip;
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+ data->mtd.owner = THIS_MODULE;
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+
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+ data->chip.IO_ADDR_R = (unsigned char *)KSEG1ADDR(ADM5120_SRAM1_BASE);
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+ data->chip.IO_ADDR_W = data->chip.IO_ADDR_R;
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+ data->chip.cmd_ctrl = rbmips_hwcontrol100;
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+ data->chip.dev_ready = rb100_dev_ready;
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+ data->chip.ecc.mode = NAND_ECC_SOFT;
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+ data->chip.ecc.layout = &rb_ecclayout;
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+ data->chip.chip_delay = 25;
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+ data->chip.options |= NAND_NO_AUTOINCR;
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+
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+ platform_set_drvdata(pdev, data);
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+
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+ /* Why do we need to scan 4 times ? */
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+ if (nand_scan(&data->mtd, 1) && nand_scan(&data->mtd, 1) && nand_scan(&data->mtd, 1) && nand_scan(&data->mtd, 1)) {
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printk(KERN_INFO "RB1xxx nand device not found\n");
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- iounmap ((void *)p_nand);
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- return -ENXIO;
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+ res = -ENXIO;
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+ goto out;
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}
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- add_mtd_partitions(&rmtd, partition_info, 2);
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+
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+ add_mtd_partitions(&data->mtd, partition_info, 2);
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init_ok = 1;
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+
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+ res = add_mtd_device(&data->mtd);
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+ if (!res)
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+ return res;
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+
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+ nand_release(&data->mtd);
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+out:
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+ platform_set_drvdata(pdev, NULL);
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+ iounmap(data->io_base);
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+ kfree(data);
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+ return res;
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+}
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+
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+static int __devexit rbmips_remove(struct platform_device *pdev)
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+{
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+ struct adm5120_nand_info *data = platform_get_drvdata(pdev);
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+
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+ nand_release(&data->mtd);
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+ iounmap(data->io_base);
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+ kfree(data);
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+
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return 0;
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}
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-module_init(rbmips_init);
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+static struct platform_driver adm5120_nand_driver = {
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+ .probe = rbmips_probe,
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+ .remove = rbmips_remove,
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+ .driver = {
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+ .name = "adm5120-nand",
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+ .owner = THIS_MODULE,
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+ },
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+};
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+
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+static int __init adm5120_nand_init(void)
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+{
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+ int err;
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+ err = platform_driver_register(&adm5120_nand_driver);
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+ return err;
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+}
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+
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+static void __exit adm5120_nand_exit(void)
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+{
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+ platform_driver_unregister(&adm5120_nand_driver);
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+}
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+
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+module_init(adm5120_nand_init);
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+module_exit(adm5120_nand_exit);
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+
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+MODULE_LICENSE("GPL");
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+MODULE_AUTHOR("David Goodenough, Florian Fainelli");
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+MODULE_DESCRIPTION("RouterBOARD 100 NAND driver");
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Florian Fainelli