Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/mtd/nand/au1550nd.c b/drivers/mtd/nand/au1550nd.c
new file mode 100644
index 0000000..4c7719c
--- /dev/null
+++ b/drivers/mtd/nand/au1550nd.c
@@ -0,0 +1,477 @@
+/*
+ * drivers/mtd/nand/au1550nd.c
+ *
+ * Copyright (C) 2004 Embedded Edge, LLC
+ *
+ * $Id: au1550nd.c,v 1.11 2004/11/04 12:53:10 gleixner Exp $
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/partitions.h>
+#include <asm/io.h>
+
+/* fixme: this is ugly */
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 0)
+#include <asm/mach-au1x00/au1000.h>
+#ifdef CONFIG_MIPS_PB1550
+#include <asm/mach-pb1x00/pb1550.h>
+#endif
+#ifdef CONFIG_MIPS_DB1550
+#include <asm/mach-db1x00/db1x00.h>
+#endif
+#else
+#include <asm/au1000.h>
+#ifdef CONFIG_MIPS_PB1550
+#include <asm/pb1550.h>
+#endif
+#ifdef CONFIG_MIPS_DB1550
+#include <asm/db1x00.h>
+#endif
+#endif
+
+/*
+ * MTD structure for NAND controller
+ */
+static struct mtd_info *au1550_mtd = NULL;
+static void __iomem *p_nand;
+static int nand_width = 1; /* default x8*/
+
+#define NAND_CS 1
+
+/*
+ * Define partitions for flash device
+ */
+const static struct mtd_partition partition_info[] = {
+#ifdef CONFIG_MIPS_PB1550
+#define NUM_PARTITIONS 2
+ {
+ .name = "Pb1550 NAND FS 0",
+ .offset = 0,
+ .size = 8*1024*1024
+ },
+ {
+ .name = "Pb1550 NAND FS 1",
+ .offset = MTDPART_OFS_APPEND,
+ .size = MTDPART_SIZ_FULL
+ }
+#endif
+#ifdef CONFIG_MIPS_DB1550
+#define NUM_PARTITIONS 2
+ {
+ .name = "Db1550 NAND FS 0",
+ .offset = 0,
+ .size = 8*1024*1024
+ },
+ {
+ .name = "Db1550 NAND FS 1",
+ .offset = MTDPART_OFS_APPEND,
+ .size = MTDPART_SIZ_FULL
+ }
+#endif
+};
+
+
+/**
+ * au_read_byte - read one byte from the chip
+ * @mtd: MTD device structure
+ *
+ * read function for 8bit buswith
+ */
+static u_char au_read_byte(struct mtd_info *mtd)
+{
+ struct nand_chip *this = mtd->priv;
+ u_char ret = readb(this->IO_ADDR_R);
+ au_sync();
+ return ret;
+}
+
+/**
+ * au_write_byte - write one byte to the chip
+ * @mtd: MTD device structure
+ * @byte: pointer to data byte to write
+ *
+ * write function for 8it buswith
+ */
+static void au_write_byte(struct mtd_info *mtd, u_char byte)
+{
+ struct nand_chip *this = mtd->priv;
+ writeb(byte, this->IO_ADDR_W);
+ au_sync();
+}
+
+/**
+ * au_read_byte16 - read one byte endianess aware from the chip
+ * @mtd: MTD device structure
+ *
+ * read function for 16bit buswith with
+ * endianess conversion
+ */
+static u_char au_read_byte16(struct mtd_info *mtd)
+{
+ struct nand_chip *this = mtd->priv;
+ u_char ret = (u_char) cpu_to_le16(readw(this->IO_ADDR_R));
+ au_sync();
+ return ret;
+}
+
+/**
+ * au_write_byte16 - write one byte endianess aware to the chip
+ * @mtd: MTD device structure
+ * @byte: pointer to data byte to write
+ *
+ * write function for 16bit buswith with
+ * endianess conversion
+ */
+static void au_write_byte16(struct mtd_info *mtd, u_char byte)
+{
+ struct nand_chip *this = mtd->priv;
+ writew(le16_to_cpu((u16) byte), this->IO_ADDR_W);
+ au_sync();
+}
+
+/**
+ * au_read_word - read one word from the chip
+ * @mtd: MTD device structure
+ *
+ * read function for 16bit buswith without
+ * endianess conversion
+ */
+static u16 au_read_word(struct mtd_info *mtd)
+{
+ struct nand_chip *this = mtd->priv;
+ u16 ret = readw(this->IO_ADDR_R);
+ au_sync();
+ return ret;
+}
+
+/**
+ * au_write_word - write one word to the chip
+ * @mtd: MTD device structure
+ * @word: data word to write
+ *
+ * write function for 16bit buswith without
+ * endianess conversion
+ */
+static void au_write_word(struct mtd_info *mtd, u16 word)
+{
+ struct nand_chip *this = mtd->priv;
+ writew(word, this->IO_ADDR_W);
+ au_sync();
+}
+
+/**
+ * au_write_buf - write buffer to chip
+ * @mtd: MTD device structure
+ * @buf: data buffer
+ * @len: number of bytes to write
+ *
+ * write function for 8bit buswith
+ */
+static void au_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
+{
+ int i;
+ struct nand_chip *this = mtd->priv;
+
+ for (i=0; i<len; i++) {
+ writeb(buf[i], this->IO_ADDR_W);
+ au_sync();
+ }
+}
+
+/**
+ * au_read_buf - read chip data into buffer
+ * @mtd: MTD device structure
+ * @buf: buffer to store date
+ * @len: number of bytes to read
+ *
+ * read function for 8bit buswith
+ */
+static void au_read_buf(struct mtd_info *mtd, u_char *buf, int len)
+{
+ int i;
+ struct nand_chip *this = mtd->priv;
+
+ for (i=0; i<len; i++) {
+ buf[i] = readb(this->IO_ADDR_R);
+ au_sync();
+ }
+}
+
+/**
+ * au_verify_buf - Verify chip data against buffer
+ * @mtd: MTD device structure
+ * @buf: buffer containing the data to compare
+ * @len: number of bytes to compare
+ *
+ * verify function for 8bit buswith
+ */
+static int au_verify_buf(struct mtd_info *mtd, const u_char *buf, int len)
+{
+ int i;
+ struct nand_chip *this = mtd->priv;
+
+ for (i=0; i<len; i++) {
+ if (buf[i] != readb(this->IO_ADDR_R))
+ return -EFAULT;
+ au_sync();
+ }
+
+ return 0;
+}
+
+/**
+ * au_write_buf16 - write buffer to chip
+ * @mtd: MTD device structure
+ * @buf: data buffer
+ * @len: number of bytes to write
+ *
+ * write function for 16bit buswith
+ */
+static void au_write_buf16(struct mtd_info *mtd, const u_char *buf, int len)
+{
+ int i;
+ struct nand_chip *this = mtd->priv;
+ u16 *p = (u16 *) buf;
+ len >>= 1;
+
+ for (i=0; i<len; i++) {
+ writew(p[i], this->IO_ADDR_W);
+ au_sync();
+ }
+
+}
+
+/**
+ * au_read_buf16 - read chip data into buffer
+ * @mtd: MTD device structure
+ * @buf: buffer to store date
+ * @len: number of bytes to read
+ *
+ * read function for 16bit buswith
+ */
+static void au_read_buf16(struct mtd_info *mtd, u_char *buf, int len)
+{
+ int i;
+ struct nand_chip *this = mtd->priv;
+ u16 *p = (u16 *) buf;
+ len >>= 1;
+
+ for (i=0; i<len; i++) {
+ p[i] = readw(this->IO_ADDR_R);
+ au_sync();
+ }
+}
+
+/**
+ * au_verify_buf16 - Verify chip data against buffer
+ * @mtd: MTD device structure
+ * @buf: buffer containing the data to compare
+ * @len: number of bytes to compare
+ *
+ * verify function for 16bit buswith
+ */
+static int au_verify_buf16(struct mtd_info *mtd, const u_char *buf, int len)
+{
+ int i;
+ struct nand_chip *this = mtd->priv;
+ u16 *p = (u16 *) buf;
+ len >>= 1;
+
+ for (i=0; i<len; i++) {
+ if (p[i] != readw(this->IO_ADDR_R))
+ return -EFAULT;
+ au_sync();
+ }
+ return 0;
+}
+
+
+static void au1550_hwcontrol(struct mtd_info *mtd, int cmd)
+{
+ register struct nand_chip *this = mtd->priv;
+
+ switch(cmd){
+
+ case NAND_CTL_SETCLE: this->IO_ADDR_W = p_nand + MEM_STNAND_CMD; break;
+ case NAND_CTL_CLRCLE: this->IO_ADDR_W = p_nand + MEM_STNAND_DATA; break;
+
+ case NAND_CTL_SETALE: this->IO_ADDR_W = p_nand + MEM_STNAND_ADDR; break;
+ case NAND_CTL_CLRALE:
+ this->IO_ADDR_W = p_nand + MEM_STNAND_DATA;
+ /* FIXME: Nobody knows why this is neccecary,
+ * but it works only that way */
+ udelay(1);
+ break;
+
+ case NAND_CTL_SETNCE:
+ /* assert (force assert) chip enable */
+ au_writel((1<<(4+NAND_CS)) , MEM_STNDCTL); break;
+ break;
+
+ case NAND_CTL_CLRNCE:
+ /* deassert chip enable */
+ au_writel(0, MEM_STNDCTL); break;
+ break;
+ }
+
+ this->IO_ADDR_R = this->IO_ADDR_W;
+
+ /* Drain the writebuffer */
+ au_sync();
+}
+
+int au1550_device_ready(struct mtd_info *mtd)
+{
+ int ret = (au_readl(MEM_STSTAT) & 0x1) ? 1 : 0;
+ au_sync();
+ return ret;
+}
+
+/*
+ * Main initialization routine
+ */
+int __init au1550_init (void)
+{
+ struct nand_chip *this;
+ u16 boot_swapboot = 0; /* default value */
+ int retval;
+
+ /* Allocate memory for MTD device structure and private data */
+ au1550_mtd = kmalloc (sizeof(struct mtd_info) +
+ sizeof (struct nand_chip), GFP_KERNEL);
+ if (!au1550_mtd) {
+ printk ("Unable to allocate NAND MTD dev structure.\n");
+ return -ENOMEM;
+ }
+
+ /* Get pointer to private data */
+ this = (struct nand_chip *) (&au1550_mtd[1]);
+
+ /* Initialize structures */
+ memset((char *) au1550_mtd, 0, sizeof(struct mtd_info));
+ memset((char *) this, 0, sizeof(struct nand_chip));
+
+ /* Link the private data with the MTD structure */
+ au1550_mtd->priv = this;
+
+
+ /* MEM_STNDCTL: disable ints, disable nand boot */
+ au_writel(0, MEM_STNDCTL);
+
+#ifdef CONFIG_MIPS_PB1550
+ /* set gpio206 high */
+ au_writel(au_readl(GPIO2_DIR) & ~(1<<6), GPIO2_DIR);
+
+ boot_swapboot = (au_readl(MEM_STSTAT) & (0x7<<1)) |
+ ((bcsr->status >> 6) & 0x1);
+ switch (boot_swapboot) {
+ case 0:
+ case 2:
+ case 8:
+ case 0xC:
+ case 0xD:
+ /* x16 NAND Flash */
+ nand_width = 0;
+ break;
+ case 1:
+ case 9:
+ case 3:
+ case 0xE:
+ case 0xF:
+ /* x8 NAND Flash */
+ nand_width = 1;
+ break;
+ default:
+ printk("Pb1550 NAND: bad boot:swap\n");
+ retval = -EINVAL;
+ goto outmem;
+ }
+#endif
+
+ /* Configure RCE1 - should be done by YAMON */
+ au_writel(0x5 | (nand_width << 22), 0xB4001010); /* MEM_STCFG1 */
+ au_writel(NAND_TIMING, 0xB4001014); /* MEM_STTIME1 */
+ au_sync();
+
+ /* setup and enable chip select, MEM_STADDR1 */
+ /* we really need to decode offsets only up till 0x20 */
+ au_writel((1<<28) | (NAND_PHYS_ADDR>>4) |
+ (((NAND_PHYS_ADDR + 0x1000)-1) & (0x3fff<<18)>>18),
+ MEM_STADDR1);
+ au_sync();
+
+ p_nand = ioremap(NAND_PHYS_ADDR, 0x1000);
+
+ /* Set address of hardware control function */
+ this->hwcontrol = au1550_hwcontrol;
+ this->dev_ready = au1550_device_ready;
+ /* 30 us command delay time */
+ this->chip_delay = 30;
+ this->eccmode = NAND_ECC_SOFT;
+
+ this->options = NAND_NO_AUTOINCR;
+
+ if (!nand_width)
+ this->options |= NAND_BUSWIDTH_16;
+
+ this->read_byte = (!nand_width) ? au_read_byte16 : au_read_byte;
+ this->write_byte = (!nand_width) ? au_write_byte16 : au_write_byte;
+ this->write_word = au_write_word;
+ this->read_word = au_read_word;
+ this->write_buf = (!nand_width) ? au_write_buf16 : au_write_buf;
+ this->read_buf = (!nand_width) ? au_read_buf16 : au_read_buf;
+ this->verify_buf = (!nand_width) ? au_verify_buf16 : au_verify_buf;
+
+ /* Scan to find existence of the device */
+ if (nand_scan (au1550_mtd, 1)) {
+ retval = -ENXIO;
+ goto outio;
+ }
+
+ /* Register the partitions */
+ add_mtd_partitions(au1550_mtd, partition_info, NUM_PARTITIONS);
+
+ return 0;
+
+ outio:
+ iounmap ((void *)p_nand);
+
+ outmem:
+ kfree (au1550_mtd);
+ return retval;
+}
+
+module_init(au1550_init);
+
+/*
+ * Clean up routine
+ */
+#ifdef MODULE
+static void __exit au1550_cleanup (void)
+{
+ struct nand_chip *this = (struct nand_chip *) &au1550_mtd[1];
+
+ /* Release resources, unregister device */
+ nand_release (au1550_mtd);
+
+ /* Free the MTD device structure */
+ kfree (au1550_mtd);
+
+ /* Unmap */
+ iounmap ((void *)p_nand);
+}
+module_exit(au1550_cleanup);
+#endif
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Embedded Edge, LLC");
+MODULE_DESCRIPTION("Board-specific glue layer for NAND flash on Pb1550 board");