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[Hackndev-commit] SF.net SVN: hackndev: [1240] linux4palm/linux/trunk
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From: <mar...@us...> - 2007-08-18 16:13:49
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Revision: 1240
http://hackndev.svn.sourceforge.net/hackndev/?rev=1240&view=rev
Author: marex_z71
Date: 2007-08-18 09:13:40 -0700 (Sat, 18 Aug 2007)
Log Message:
-----------
PalmTX: UNTESTED NAND Flash driver ... looking for stunts ;-)
Modified Paths:
--------------
linux4palm/linux/trunk/drivers/mtd/nand/Kconfig
linux4palm/linux/trunk/drivers/mtd/nand/Makefile
linux4palm/linux/trunk/include/asm-arm/arch-pxa/palmtx-gpio.h
Added Paths:
-----------
linux4palm/linux/trunk/drivers/mtd/nand/palmtx.c
Modified: linux4palm/linux/trunk/drivers/mtd/nand/Kconfig
===================================================================
--- linux4palm/linux/trunk/drivers/mtd/nand/Kconfig 2007-08-14 15:02:54 UTC (rev 1239)
+++ linux4palm/linux/trunk/drivers/mtd/nand/Kconfig 2007-08-18 16:13:40 UTC (rev 1240)
@@ -51,6 +51,12 @@
help
This enables the driver for the iPAQ h1900 flash.
+config MTD_NAND_PALMTX
+ tristate "Palm T|X NAND flash (!UNTESTED!)"
+ depends on MTD_NAND && ARCH_PXA && MTD_PARTITIONS
+ help
+ This enables the driver for the Palm T|X NAND flash.
+
config MTD_NAND_SPIA
tristate "NAND Flash device on SPIA board"
depends on ARCH_P720T && MTD_NAND
Modified: linux4palm/linux/trunk/drivers/mtd/nand/Makefile
===================================================================
--- linux4palm/linux/trunk/drivers/mtd/nand/Makefile 2007-08-14 15:02:54 UTC (rev 1239)
+++ linux4palm/linux/trunk/drivers/mtd/nand/Makefile 2007-08-18 16:13:40 UTC (rev 1240)
@@ -18,6 +18,7 @@
obj-$(CONFIG_MTD_NAND_HAMCOP) += hamcop_nand.o
obj-$(CONFIG_MTD_NAND_DISKONCHIP) += diskonchip.o
obj-$(CONFIG_MTD_NAND_H1900) += h1910.o
+obj-$(CONFIG_MTD_NAND_PALMTX) += palmtx.o
obj-$(CONFIG_MTD_NAND_RTC_FROM4) += rtc_from4.o
obj-$(CONFIG_MTD_NAND_SHARPSL) += sharpsl.o
obj-$(CONFIG_MTD_NAND_TS7250) += ts7250.o
Added: linux4palm/linux/trunk/drivers/mtd/nand/palmtx.c
===================================================================
--- linux4palm/linux/trunk/drivers/mtd/nand/palmtx.c (rev 0)
+++ linux4palm/linux/trunk/drivers/mtd/nand/palmtx.c 2007-08-18 16:13:40 UTC (rev 1240)
@@ -0,0 +1,191 @@
+/*
+ * drivers/mtd/nand/palmtx.c
+ *
+ * Copyright (C) 2007 Marek Vasut (mar...@gm...)
+ *
+ * Derived from drivers/mtd/nand/h1910.c
+ * Copyright (C) 2003 Joshua Wise (jo...@jo...)
+ *
+ * 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.
+ *
+ * Overview:
+ * This is a device driver for the NAND flash device found on the
+ * Palm T|X board which utilizes the Samsung K9F1G08U0A part. This is
+ * a 1Gbit (128MiB x 8 bits) NAND flash device.
+ */
+
+#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>
+#include <asm/sizes.h>
+#include <asm/arch/palmtx-gpio.h>
+#include <asm/arch/pxa-regs.h>
+#include <asm/setup.h>
+#include <asm/memory.h>
+#include <asm/mach-types.h>
+
+#define PALMTX_NAND_BASE 0x08000000
+
+/*
+ * MTD structure
+ */
+static struct mtd_info *palmtx_nand_mtd = NULL;
+
+/*
+ * Module stuff
+ */
+
+#ifdef CONFIG_MTD_PARTITIONS
+/*
+ * Define static partitions for flash device
+ */
+static struct mtd_partition partition_info[] = {
+ {name:"PalmTX NAND Flash",
+ offset:0,
+ size:128 * 1024 * 1024}
+};
+
+#define NUM_PARTITIONS 1
+
+#endif
+
+/*
+ * hardware specific access to control-lines
+ *
+ * NAND_NCE: bit 0 - don't care
+ * NAND_CLE: bit 1 - address bit 2
+ * NAND_ALE: bit 2 - address bit 3
+ */
+static void palmtx_hwcontrol(struct mtd_info *mtd, int cmd,
+ unsigned int ctrl)
+{
+ struct nand_chip *chip = mtd->priv;
+
+ if (cmd != NAND_CMD_NONE)
+ writeb(cmd, (void __iomem *)((unsigned long)chip->IO_ADDR_W | ((ctrl & 0x6) << 1)));
+}
+
+/*
+ * read device ready pin
+ */
+static int palmtx_device_ready(struct mtd_info *mtd)
+{
+ return GET_PALMTX_GPIO(NAND_READY);
+}
+
+/*
+ * Main initialization routine
+ */
+static int __init palmtx_init(void)
+{
+ struct nand_chip *this;
+ const char *part_type = 0;
+ int mtd_parts_nb = 0;
+ struct mtd_partition *mtd_parts = 0;
+ void __iomem *nandaddr;
+
+ if (!machine_is_xscale_palmtx())
+ return -ENODEV;
+
+ nandaddr = ioremap(PALMTX_NAND_BASE, 0x1000);
+ if (!nandaddr) {
+ printk("Failed to ioremap NAND flash.\n");
+ return -ENOMEM;
+ }
+
+ /* Allocate memory for MTD device structure and private data */
+ palmtx_nand_mtd = kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip), GFP_KERNEL);
+ if (!palmtx_nand_mtd) {
+ printk("Unable to allocate palmtx NAND MTD device structure.\n");
+ iounmap((void *)nandaddr);
+ return -ENOMEM;
+ }
+
+ /* Get pointer to private data */
+ this = (struct nand_chip *)(&palmtx_nand_mtd[1]);
+
+ /* Initialize structures */
+ memset(palmtx_nand_mtd, 0, sizeof(struct mtd_info));
+ memset(this, 0, sizeof(struct nand_chip));
+
+ /* Link the private data with the MTD structure */
+ palmtx_nand_mtd->priv = this;
+ palmtx_nand_mtd->owner = THIS_MODULE;
+
+ /*
+ * Enable VPEN
+ */
+ SET_PALMTX_GPIO(NAND_POWER, 1);
+
+ /* insert callbacks */
+ this->IO_ADDR_R = nandaddr;
+ this->IO_ADDR_W = nandaddr;
+ this->cmd_ctrl = palmtx_hwcontrol;
+#if 0
+ this->dev_ready = palmtx_device_ready;
+#else
+ this->dev_ready = NULL;
+#endif
+ /* 15 us command delay time */
+ this->chip_delay = 50;
+ this->ecc.mode = NAND_ECC_SOFT;
+ this->options = NAND_NO_AUTOINCR;
+
+ /* Scan to find existence of the device */
+ if (nand_scan(palmtx_nand_mtd, 1)) {
+ printk(KERN_NOTICE "No NAND device - returning -ENXIO\n");
+ kfree(palmtx_nand_mtd);
+ iounmap((void *)nandaddr);
+ return -ENXIO;
+ }
+#ifdef CONFIG_MTD_CMDLINE_PARTS
+ mtd_parts_nb = parse_cmdline_partitions(palmtx_nand_mtd, &mtd_parts, "palmtx-nand");
+ if (mtd_parts_nb > 0)
+ part_type = "command line";
+ else
+ mtd_parts_nb = 0;
+#endif
+ if (mtd_parts_nb == 0) {
+ mtd_parts = partition_info;
+ mtd_parts_nb = NUM_PARTITIONS;
+ part_type = "static";
+ }
+
+ /* Register the partitions */
+ printk(KERN_NOTICE "Using %s partition definition\n", part_type);
+ add_mtd_partitions(palmtx_nand_mtd, mtd_parts, mtd_parts_nb);
+
+ /* Return happy */
+ return 0;
+}
+
+module_init(palmtx_init);
+
+/*
+ * Clean up routine
+ */
+static void __exit palmtx_cleanup(void)
+{
+ struct nand_chip *this = (struct nand_chip *)&palmtx_nand_mtd[1];
+
+ /* Release resources, unregister device */
+ nand_release(palmtx_nand_mtd);
+
+ /* Release io resource */
+ iounmap((void *)this->IO_ADDR_W);
+
+ /* Free the MTD device structure */
+ kfree(palmtx_nand_mtd);
+}
+
+module_exit(palmtx_cleanup);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Marek Vasut <mar...@gm...>");
+MODULE_DESCRIPTION("NAND flash driver for Palm T|X");
Modified: linux4palm/linux/trunk/include/asm-arm/arch-pxa/palmtx-gpio.h
===================================================================
--- linux4palm/linux/trunk/include/asm-arm/arch-pxa/palmtx-gpio.h 2007-08-14 15:02:54 UTC (rev 1239)
+++ linux4palm/linux/trunk/include/asm-arm/arch-pxa/palmtx-gpio.h 2007-08-18 16:13:40 UTC (rev 1240)
@@ -90,6 +90,11 @@
#define GPIO_NR_PALMTX_PCMCIA_RESET 79
#define GPIO_NR_PALMTX_PCMCIA_READY 116
+/* NAND Flash ... these GPIOs are probably incorrect! */
+#define GPIO_NR_PALMTX_NAND_POWER 19
+#define GPIO_NR_PALMTX_NAND_READY 37
+
+
/* INTERRUPTS */
#define IRQ_GPIO_PALMTX_SD_DETECT_N IRQ_GPIO(GPIO_NR_PALMTX_SD_DETECT_N)
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