1 files changed, 177 insertions, 0 deletions

diff --git a/drivers/mtd/maps/sun_uflash.c b/drivers/mtd/maps/sun_uflash.c
new file mode 100644
index 000000000000..29091d10030a
--- /dev/null
+++ b/drivers/mtd/maps/sun_uflash.c
@@ -0,0 +1,177 @@
+/* $Id: sun_uflash.c,v 1.11 2004/11/04 13:24:15 gleixner Exp $
+ *
+ * sun_uflash - Driver implementation for user-programmable flash
+ * present on many Sun Microsystems SME boardsets.
+ *
+ * This driver does NOT provide access to the OBP-flash for
+ * safety reasons-- use <linux>/drivers/sbus/char/flash.c instead.
+ *
+ * Copyright (c) 2001 Eric Brower (ebrower@usa.net)
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <asm/ebus.h>
+#include <asm/oplib.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+
+#define UFLASH_OBPNAME  "flashprom"
+#define UFLASH_DEVNAME  "userflash"
+
+#define UFLASH_WINDOW_SIZE      0x200000
+#define UFLASH_BUSWIDTH         1                       /* EBus is 8-bit */
+
+MODULE_AUTHOR
+        ("Eric Brower <ebrower@usa.net>");
+MODULE_DESCRIPTION
+        ("User-programmable flash device on Sun Microsystems boardsets");
+MODULE_SUPPORTED_DEVICE
+        ("userflash");
+MODULE_LICENSE
+        ("GPL");
+
+static LIST_HEAD(device_list);
+struct uflash_dev {
+        char *                  name;   /* device name */
+        struct map_info         map;    /* mtd map info */
+        struct mtd_info *       mtd;    /* mtd info */
+        struct list_head        list;
+};
+
+
+struct map_info uflash_map_templ = {
+                .name =         "SUNW,???-????",
+                .size =         UFLASH_WINDOW_SIZE,
+                .bankwidth =    UFLASH_BUSWIDTH,
+};
+
+int uflash_devinit(struct linux_ebus_device* edev)
+{
+        int iTmp, nregs;
+        struct linux_prom_registers regs[2];
+        struct uflash_dev *pdev;
+
+        iTmp = prom_getproperty(
+                edev->prom_node, "reg", (void *)regs, sizeof(regs));
+        if ((iTmp % sizeof(regs[0])) != 0) {
+                printk("%s: Strange reg property size %d\n", 
+                        UFLASH_DEVNAME, iTmp);
+                return -ENODEV;
+        }
+
+        nregs = iTmp / sizeof(regs[0]);
+
+        if (nregs != 1) {
+                /* Non-CFI userflash device-- once I find one we
+                 * can work on supporting it.
+                 */
+                printk("%s: unsupported device at 0x%lx (%d regs): " \
+                        "email ebrower@usa.net\n", 
+                        UFLASH_DEVNAME, edev->resource[0].start, nregs);
+                return -ENODEV;
+        }
+
+        if(0 == (pdev = kmalloc(sizeof(struct uflash_dev), GFP_KERNEL))) {
+                printk("%s: unable to kmalloc new device\n", UFLASH_DEVNAME);
+                return(-ENOMEM);
+        }
+        
+        /* copy defaults and tweak parameters */
+        memcpy(&pdev->map, &uflash_map_templ, sizeof(uflash_map_templ));
+        pdev->map.size = regs[0].reg_size;
+
+        iTmp = prom_getproplen(edev->prom_node, "model");
+        pdev->name = kmalloc(iTmp, GFP_KERNEL);
+        prom_getstring(edev->prom_node, "model", pdev->name, iTmp);
+        if(0 != pdev->name && 0 < strlen(pdev->name)) {
+                pdev->map.name = pdev->name;
+        }
+        pdev->map.phys = edev->resource[0].start;
+        pdev->map.virt = ioremap_nocache(edev->resource[0].start, pdev->map.size);
+        if(0 == pdev->map.virt) {
+                printk("%s: failed to map device\n", __FUNCTION__);
+                kfree(pdev->name);
+                kfree(pdev);
+                return(-1);
+        }
+
+        simple_map_init(&pdev->map);
+
+        /* MTD registration */
+        pdev->mtd = do_map_probe("cfi_probe", &pdev->map);
+        if(0 == pdev->mtd) {
+                iounmap(pdev->map.virt);
+                kfree(pdev->name);
+                kfree(pdev);
+                return(-ENXIO);
+        }
+
+        list_add(&pdev->list, &device_list);
+
+        pdev->mtd->owner = THIS_MODULE;
+
+        add_mtd_device(pdev->mtd);
+        return(0);
+}
+
+static int __init uflash_init(void)
+{
+        struct linux_ebus *ebus = NULL;
+        struct linux_ebus_device *edev = NULL;
+
+        for_each_ebus(ebus) {
+                for_each_ebusdev(edev, ebus) {
+                        if (!strcmp(edev->prom_name, UFLASH_OBPNAME)) {
+                                if(0 > prom_getproplen(edev->prom_node, "user")) {
+                                        DEBUG(2, "%s: ignoring device at 0x%lx\n",
+                                                        UFLASH_DEVNAME, edev->resource[0].start);
+                                } else {
+                                        uflash_devinit(edev);
+                                }
+                        }
+                }
+        }
+
+        if(list_empty(&device_list)) {
+                printk("%s: unable to locate device\n", UFLASH_DEVNAME);
+                return -ENODEV;
+        }
+        return(0);
+}
+
+static void __exit uflash_cleanup(void)
+{
+        struct list_head *udevlist;
+        struct uflash_dev *udev;
+
+        list_for_each(udevlist, &device_list) {
+                udev = list_entry(udevlist, struct uflash_dev, list);
+                DEBUG(2, "%s: removing device %s\n", 
+                        UFLASH_DEVNAME, udev->name);
+
+                if(0 != udev->mtd) {
+                        del_mtd_device(udev->mtd);
+                        map_destroy(udev->mtd);
+                }
+                if(0 != udev->map.virt) {
+                        iounmap(udev->map.virt);
+                        udev->map.virt = NULL;
+                }
+                if(0 != udev->name) {
+                        kfree(udev->name);
+                }
+                kfree(udev);
+        }       
+}
+
+module_init(uflash_init);
+module_exit(uflash_cleanup);