[MTD] NOR flash map driver for TI OMAP boards.

From: David Brownell, Jian Zhang <jzhang@ti.com>, Tony Lindgren
<tony@atomide.com> and others.

Signed-off-by: Todd Poynor <tpoynor@mvista.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig
index dbe1716..ac853d4 100644 (file)
--- a/drivers/mtd/maps/Kconfig
+++ b/drivers/mtd/maps/Kconfig
@@ -1,5 +1,5 @@
 # drivers/mtd/maps/Kconfig
-# $Id: Kconfig,v 1.54 2005/06/30 22:41:36 tpoynor Exp $
+# $Id: Kconfig,v 1.55 2005/07/02 01:53:24 tpoynor Exp $
 
 menu "Mapping drivers for chip access"
        depends on MTD!=n
@@ -523,6 +523,15 @@ config MTD_MPC1211
          This enables access to the flash chips on the Interface MPC-1211(CTP/PCI/MPC-SH02).
          If you have such a board, say 'Y'.
 
+config MTD_OMAP_NOR
+       tristate "TI OMAP board mappings"
+       depends on MTD_CFI && ARCH_OMAP
+       help
+         This enables access to the NOR flash chips on TI OMAP-based
+         boards defining flash platform devices and flash platform data.
+         These boards include the Innovator, H2, H3, OSK, Perseus2, and
+         more.  If you have such a board, say 'Y'.
+
 # This needs CFI or JEDEC, depending on the cards found.
 config MTD_PCI
        tristate "PCI MTD driver"

diff --git a/drivers/mtd/maps/Makefile b/drivers/mtd/maps/Makefile
index 789a4b7..7bcbc49 100644 (file)
--- a/drivers/mtd/maps/Makefile
+++ b/drivers/mtd/maps/Makefile
@@ -1,7 +1,7 @@
 #
 # linux/drivers/maps/Makefile
 #
-# $Id: Makefile.common,v 1.29 2005/06/30 22:41:36 tpoynor Exp $
+# $Id: Makefile.common,v 1.30 2005/07/02 01:53:24 tpoynor Exp $
 
 ifeq ($(CONFIG_MTD_COMPLEX_MAPPINGS),y)
 obj-$(CONFIG_MTD)              += map_funcs.o
@@ -69,3 +69,4 @@ obj-$(CONFIG_MTD_WRSBC8260)   += wr_sbc82xx_flash.o
 obj-$(CONFIG_MTD_DMV182)       += dmv182.o
 obj-$(CONFIG_MTD_SHARP_SL)     += sharpsl-flash.o
 obj-$(CONFIG_MTD_PLATRAM)      += plat-ram.o
+obj-$(CONFIG_MTD_OMAP_NOR)     += omap_nor.o

diff --git a/drivers/mtd/maps/omap_nor.c b/drivers/mtd/maps/omap_nor.c
new file mode 100644 (file)
index 0000000..8cc7140
--- /dev/null
+++ b/drivers/mtd/maps/omap_nor.c
@@ -0,0 +1,179 @@
+/*
+ * Flash memory support for various TI OMAP boards
+ *
+ * Copyright (C) 2001-2002 MontaVista Software Inc.
+ * Copyright (C) 2003-2004 Texas Instruments
+ * Copyright (C) 2004 Nokia Corporation 
+ *
+ *     Assembled using driver code copyright the companies above
+ *     and written by David Brownell, Jian Zhang <jzhang@ti.com>,
+ *     Tony Lindgren <tony@atomide.com> and others.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * You should have received a copy of the  GNU General Public License along
+ * with this program; if not, write  to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+
+#include <asm/io.h>
+#include <asm/hardware.h>
+#include <asm/mach-types.h>
+#include <asm/mach/flash.h>
+#include <asm/arch/tc.h>
+
+#ifdef CONFIG_MTD_PARTITIONS
+static const char *part_probes[] = { /* "RedBoot", */ "cmdlinepart", NULL };
+#endif
+
+struct omapflash_info {
+       struct mtd_partition    *parts;
+       struct mtd_info         *mtd;
+       struct map_info         map;
+};
+
+static void omap_set_vpp(struct map_info *map, int enable)
+{
+       static int      count;
+
+       if (enable) {
+               if (count++ == 0)
+                       OMAP_EMIFS_CONFIG_REG |= OMAP_EMIFS_CONFIG_WP;
+       } else {
+               if (count && (--count == 0))
+                       OMAP_EMIFS_CONFIG_REG &= ~OMAP_EMIFS_CONFIG_WP;
+       }
+}
+
+static int __devinit omapflash_probe(struct device *dev)
+{
+       int err;
+       struct omapflash_info *info;
+       struct platform_device *pdev = to_platform_device(dev);
+       struct flash_platform_data *pdata = pdev->dev.platform_data;
+       struct resource *res = pdev->resource;
+       unsigned long size = res->end - res->start + 1;
+
+       info = kmalloc(sizeof(struct omapflash_info), GFP_KERNEL);
+       if (!info)
+               return -ENOMEM;
+
+       memset(info, 0, sizeof(struct omapflash_info));
+
+       if (!request_mem_region(res->start, size, "flash")) {
+               err = -EBUSY;
+               goto out_free_info;
+       }
+
+       info->map.virt          = ioremap(res->start, size);
+       if (!info->map.virt) {
+               err = -ENOMEM;
+               goto out_release_mem_region;
+       }
+       info->map.name          = pdev->dev.bus_id;
+       info->map.phys          = res->start;
+       info->map.size          = size;
+       info->map.bankwidth     = pdata->width;
+       info->map.set_vpp       = omap_set_vpp;
+
+       simple_map_init(&info->map);
+       info->mtd = do_map_probe(pdata->map_name, &info->map);
+       if (!info->mtd) {
+               err = -EIO;
+               goto out_iounmap;
+       }
+       info->mtd->owner = THIS_MODULE;
+
+#ifdef CONFIG_MTD_PARTITIONS
+       err = parse_mtd_partitions(info->mtd, part_probes, &info->parts, 0);
+       if (err > 0)
+               add_mtd_partitions(info->mtd, info->parts, err);
+       else if (err < 0 && pdata->parts)
+               add_mtd_partitions(info->mtd, pdata->parts, pdata->nr_parts);
+       else
+#endif
+               add_mtd_device(info->mtd);
+
+       dev_set_drvdata(&pdev->dev, info);
+
+       return 0;
+
+out_iounmap:
+       iounmap(info->map.virt);
+out_release_mem_region:
+       release_mem_region(res->start, size);
+out_free_info:
+       kfree(info);
+
+       return err;
+}
+
+static int __devexit omapflash_remove(struct device *dev)
+{
+       struct platform_device *pdev = to_platform_device(dev);
+       struct omapflash_info *info = dev_get_drvdata(&pdev->dev);
+
+       dev_set_drvdata(&pdev->dev, NULL);
+
+       if (info) {
+               if (info->parts) {
+                       del_mtd_partitions(info->mtd);
+                       kfree(info->parts);
+               } else
+                       del_mtd_device(info->mtd);
+               map_destroy(info->mtd);
+               release_mem_region(info->map.phys, info->map.size);
+               iounmap((void __iomem *) info->map.virt);
+               kfree(info);
+       }
+
+       return 0;
+}
+
+static struct device_driver omapflash_driver = {
+       .name   = "omapflash",
+       .bus    = &platform_bus_type,
+       .probe  = omapflash_probe,
+       .remove = __devexit_p(omapflash_remove),
+};
+
+static int __init omapflash_init(void)
+{
+       return driver_register(&omapflash_driver);
+}
+
+static void __exit omapflash_exit(void)
+{
+       driver_unregister(&omapflash_driver);
+}
+
+module_init(omapflash_init);
+module_exit(omapflash_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("MTD NOR map driver for TI OMAP boards");
+