1 files changed, 263 insertions, 0 deletions

diff --git a/drivers/mtd/maps/tqm8xxl.c b/drivers/mtd/maps/tqm8xxl.c
new file mode 100644
index 000000000000..995e9991cb8d
--- /dev/null
+++ b/drivers/mtd/maps/tqm8xxl.c
@@ -0,0 +1,263 @@
+/*
+ * Handle mapping of the flash memory access routines 
+ * on TQM8xxL based devices.
+ *
+ * $Id: tqm8xxl.c,v 1.13 2004/10/20 22:21:53 dwmw2 Exp $
+ *
+ * based on rpxlite.c
+ *
+ * Copyright(C) 2001 Kirk Lee <kirk@hpc.ee.ntu.edu.tw>
+ *
+ * This code is GPLed
+ * 
+ */
+
+/*
+ * According to TQM8xxL hardware manual, TQM8xxL series have
+ * following flash memory organisations:
+ *      | capacity |    | chip type |   | bank0 |       | bank1 |
+ *          2MiB           512Kx16        2MiB             0
+ *          4MiB           1Mx16          4MiB             0
+ *          8MiB           1Mx16          4MiB             4MiB
+ * Thus, we choose CONFIG_MTD_CFI_I2 & CONFIG_MTD_CFI_B4 at 
+ * kernel configuration.
+ */
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <asm/io.h>
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+
+#define FLASH_ADDR 0x40000000
+#define FLASH_SIZE 0x00800000
+#define FLASH_BANK_MAX 4
+
+// trivial struct to describe partition information
+struct mtd_part_def
+{
+        int nums;
+        unsigned char *type;
+        struct mtd_partition* mtd_part;
+};
+
+//static struct mtd_info *mymtd;
+static struct mtd_info* mtd_banks[FLASH_BANK_MAX];
+static struct map_info* map_banks[FLASH_BANK_MAX];
+static struct mtd_part_def part_banks[FLASH_BANK_MAX];
+static unsigned long num_banks;
+static void __iomem *start_scan_addr;
+
+/*
+ * Here are partition information for all known TQM8xxL series devices.
+ * See include/linux/mtd/partitions.h for definition of the mtd_partition
+ * structure.
+ * 
+ * The *_max_flash_size is the maximum possible mapped flash size which
+ * is not necessarily the actual flash size.  It must correspond to the 
+ * value specified in the mapping definition defined by the
+ * "struct map_desc *_io_desc" for the corresponding machine.
+ */
+
+#ifdef CONFIG_MTD_PARTITIONS
+/* Currently, TQM8xxL has upto 8MiB flash */
+static unsigned long tqm8xxl_max_flash_size = 0x00800000;
+
+/* partition definition for first flash bank
+ * (cf. "drivers/char/flash_config.c")
+ */
+static struct mtd_partition tqm8xxl_partitions[] = {
+        {
+          .name = "ppcboot",
+          .offset = 0x00000000,
+          .size = 0x00020000,           /* 128KB           */
+          .mask_flags = MTD_WRITEABLE,  /* force read-only */
+        },
+        {
+          .name = "kernel",             /* default kernel image */
+          .offset = 0x00020000,
+          .size = 0x000e0000,
+          .mask_flags = MTD_WRITEABLE,  /* force read-only */
+        },
+        {
+          .name = "user",
+          .offset = 0x00100000,
+          .size = 0x00100000,
+        },
+        {
+          .name = "initrd",
+          .offset = 0x00200000,
+          .size = 0x00200000,
+        }
+};
+/* partition definition for second flash bank */
+static struct mtd_partition tqm8xxl_fs_partitions[] = {
+        {
+          .name = "cramfs",
+          .offset = 0x00000000,
+          .size = 0x00200000,
+        },
+        {
+          .name = "jffs",
+          .offset = 0x00200000,
+          .size = 0x00200000,
+          //.size = MTDPART_SIZ_FULL,
+        }
+};
+#endif
+
+int __init init_tqm_mtd(void)
+{
+        int idx = 0, ret = 0;
+        unsigned long flash_addr, flash_size, mtd_size = 0;
+        /* pointer to TQM8xxL board info data */
+        bd_t *bd = (bd_t *)__res;
+
+        flash_addr = bd->bi_flashstart;
+        flash_size = bd->bi_flashsize;
+
+        //request maximum flash size address space
+        start_scan_addr = ioremap(flash_addr, flash_size);
+        if (!start_scan_addr) {
+                printk(KERN_WARNING "%s:Failed to ioremap address:0x%x\n", __FUNCTION__, flash_addr);
+                return -EIO;
+        }
+
+        for (idx = 0 ; idx < FLASH_BANK_MAX ; idx++) {
+                if(mtd_size >= flash_size)
+                        break;
+                
+                printk(KERN_INFO "%s: chip probing count %d\n", __FUNCTION__, idx);
+                
+                map_banks[idx] = (struct map_info *)kmalloc(sizeof(struct map_info), GFP_KERNEL);
+                if(map_banks[idx] == NULL) {
+                        ret = -ENOMEM;
+                        /* FIXME: What if some MTD devices were probed already? */
+                        goto error_mem;
+                }
+
+                memset((void *)map_banks[idx], 0, sizeof(struct map_info));
+                map_banks[idx]->name = (char *)kmalloc(16, GFP_KERNEL);
+
+                if (!map_banks[idx]->name) {
+                        ret = -ENOMEM;
+                        /* FIXME: What if some MTD devices were probed already? */
+                        goto error_mem;
+                }
+                sprintf(map_banks[idx]->name, "TQM8xxL%d", idx);
+
+                map_banks[idx]->size = flash_size;
+                map_banks[idx]->bankwidth = 4;
+
+                simple_map_init(map_banks[idx]);
+
+                map_banks[idx]->virt = start_scan_addr;
+                map_banks[idx]->phys = flash_addr;
+                /* FIXME: This looks utterly bogus, but I'm trying to
+                   preserve the behaviour of the original (shown here)...
+
+                map_banks[idx]->map_priv_1 =
+                start_scan_addr + ((idx > 0) ?
+                (mtd_banks[idx-1] ? mtd_banks[idx-1]->size : 0) : 0);
+                */
+
+                if (idx && mtd_banks[idx-1]) {
+                        map_banks[idx]->virt += mtd_banks[idx-1]->size;
+                        map_banks[idx]->phys += mtd_banks[idx-1]->size;
+                }
+
+                //start to probe flash chips
+                mtd_banks[idx] = do_map_probe("cfi_probe", map_banks[idx]);
+
+                if (mtd_banks[idx]) {
+                        mtd_banks[idx]->owner = THIS_MODULE;
+                        mtd_size += mtd_banks[idx]->size;
+                        num_banks++;
+
+                        printk(KERN_INFO "%s: bank%d, name:%s, size:%dbytes \n", __FUNCTION__, num_banks, 
+                        mtd_banks[idx]->name, mtd_banks[idx]->size);
+                }
+        }
+
+        /* no supported flash chips found */
+        if (!num_banks) {
+                printk(KERN_NOTICE "TQM8xxL: No support flash chips found!\n");
+                ret = -ENXIO;
+                goto error_mem;
+        }
+
+#ifdef CONFIG_MTD_PARTITIONS
+        /*
+         * Select Static partition definitions
+         */
+        part_banks[0].mtd_part = tqm8xxl_partitions;
+        part_banks[0].type = "Static image";
+        part_banks[0].nums = ARRAY_SIZE(tqm8xxl_partitions);
+
+        part_banks[1].mtd_part = tqm8xxl_fs_partitions;
+        part_banks[1].type = "Static file system";
+        part_banks[1].nums = ARRAY_SIZE(tqm8xxl_fs_partitions);
+
+        for(idx = 0; idx < num_banks ; idx++) {
+                if (part_banks[idx].nums == 0) {
+                        printk(KERN_NOTICE "TQM flash%d: no partition info available, registering whole flash at once\n", idx);
+                        add_mtd_device(mtd_banks[idx]);
+                } else {
+                        printk(KERN_NOTICE "TQM flash%d: Using %s partition definition\n",
+                                        idx, part_banks[idx].type);
+                        add_mtd_partitions(mtd_banks[idx], part_banks[idx].mtd_part, 
+                                                                part_banks[idx].nums);
+                }
+        }
+#else
+        printk(KERN_NOTICE "TQM flash: registering %d whole flash banks at once\n", num_banks);
+        for(idx = 0 ; idx < num_banks ; idx++)
+                add_mtd_device(mtd_banks[idx]);
+#endif
+        return 0;
+error_mem:
+        for(idx = 0 ; idx < FLASH_BANK_MAX ; idx++) {
+                if(map_banks[idx] != NULL) {
+                        if(map_banks[idx]->name != NULL) {
+                                kfree(map_banks[idx]->name);
+                                map_banks[idx]->name = NULL;
+                        }
+                        kfree(map_banks[idx]);
+                        map_banks[idx] = NULL;
+                }
+        }
+error:
+        iounmap(start_scan_addr);
+        return ret;
+}
+
+static void __exit cleanup_tqm_mtd(void)
+{
+        unsigned int idx = 0;
+        for(idx = 0 ; idx < num_banks ; idx++) {
+                /* destroy mtd_info previously allocated */
+                if (mtd_banks[idx]) {
+                        del_mtd_partitions(mtd_banks[idx]);
+                        map_destroy(mtd_banks[idx]);
+                }
+                /* release map_info not used anymore */
+                kfree(map_banks[idx]->name);
+                kfree(map_banks[idx]);
+        }
+
+        if (start_scan_addr) {
+                iounmap(start_scan_addr);
+                start_scan_addr = 0;
+        }
+}
+
+module_init(init_tqm_mtd);
+module_exit(cleanup_tqm_mtd);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Kirk Lee <kirk@hpc.ee.ntu.edu.tw>");
+MODULE_DESCRIPTION("MTD map driver for TQM8xxL boards");