[PATCH 2/2] MTD: Add initial support for DAVE "PPChameleon" board.
Wolfgang Denk
wd at denx.de
Thu Oct 13 01:44:31 EST 2005
Hello,
the following patch (against current kernel.org tree) adds MTD
support for the NOR and NAND flashes on the "PPChameleon" modules /
eval boards manufactured by DAVE s.r.l.
[PATCH] MTD: Add support for DAVE "PPChameleon" board.
Included support for the NOR and NAND flashes on the module, and for
the NAND flash on the eval board.
Note: on my system, all sectors of the NAND flash on the eval board
get flagged as bad, while there are actually only 5 bad sectors on
this device. This needs more investigation,
Signed-off-by: Wolfgang Denk <wd at denx.de>
---
commit 1fe4ae42778972c8065e5aaa1e807571798c57e8
tree 80ae5bb762dd29bb82d39f7bdd69ed7951aee629
parent c9759e3e50c6e0f7c935a0f84f6c811e0bc3bc84
author Wolfgang Denk <wd at pollux.denx.de> Wed, 12 Oct 2005 17:42:18 +0200
committer Wolfgang Denk <wd at pollux.denx.de> Wed, 12 Oct 2005 17:42:18 +0200
drivers/mtd/maps/Kconfig | 8 +++
drivers/mtd/maps/Makefile | 1
drivers/mtd/maps/ppchameleon.c | 109 +++++++++++++++++++++++++++++++++++++
drivers/mtd/nand/Kconfig | 6 +-
drivers/mtd/nand/ppchameleonevb.c | 55 +++++++++----------
5 files changed, 147 insertions(+), 32 deletions(-)
diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig
--- a/drivers/mtd/maps/Kconfig
+++ b/drivers/mtd/maps/Kconfig
@@ -356,6 +356,14 @@ config MTD_REDWOOD
Redwood board. If you have one of these boards and would like to
use the flash chips on it, say 'Y'.
+config MTD_PPCHAMELEON
+ tristate "Flash device mapped on DAVE PPChamelonEVB Boards"
+ depends on MTD_CFI && PPC32 && 40x && PPChameleonEVB
+ help
+ This enables access routines for the flash chips on the
+ DAVE PPChamelonEVB board. If you have one of these boardsr
+ and would like to use the flash chips on it, say 'Y'.
+
config MTD_UBOOT_PARTITIONS
bool "Use U-Boot partition setup"
depends on MTD_WALNUT || MTD_EBONY || MTD_OCOTEA || MTD_BAMBOO
diff --git a/drivers/mtd/maps/Makefile b/drivers/mtd/maps/Makefile
--- a/drivers/mtd/maps/Makefile
+++ b/drivers/mtd/maps/Makefile
@@ -72,3 +72,4 @@ 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
+obj-$(CONFIG_MTD_PPCHAMELEON) += ppchameleon.o
diff --git a/drivers/mtd/maps/ppchameleon.c b/drivers/mtd/maps/ppchameleon.c
new file mode 100644
--- /dev/null
+++ b/drivers/mtd/maps/ppchameleon.c
@@ -0,0 +1,109 @@
+/*
+ * drivers/mtd/maps/ppchameleon.c
+ *
+ * Mapping for DAVE PPChamelonEVB flash
+ *
+ * Maintained by Wolfgang Denk, <wd at denx.de>
+ *
+ * Copyright (c) 2005 DENX Software Engineering
+ * Wolfgang Denk <wd at denx.de>
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+#include <linux/config.h>
+#include <linux/version.h>
+#include <asm/io.h>
+#include <asm/ibm4xx.h>
+#include <asm/ppcboot.h>
+
+extern bd_t __res;
+
+static struct mtd_info *flash;
+
+static struct map_info ppchameleon_map = {
+ .name = "PPChameleon",
+ .bankwidth = 2,
+};
+
+static struct mtd_partition ppchameleon_partitions[] = {
+ {
+ name: "linux", /* Linux kernel image */
+ offset: 0x00000000,
+ size: 0x00180000,
+/* mask_flags: MTD_WRITEABLE, / * force read-only */
+ },
+ {
+ name: "user", /* unassigned */
+ offset: 0x00180000,
+ size: 0x00240000,
+ },
+ {
+ name: "u-boot", /* U-Boot Firmware */
+ offset: 0x003C0000,
+ size: 0x00040000, /* 256 KB */
+/* mask_flags: MTD_WRITEABLE, / * force read-only */
+ },
+};
+
+int __init init_ppchameleon(void)
+{
+ unsigned long flash_base, flash_size;
+
+ flash_base = __res.bi_flashstart;
+ flash_size = __res.bi_flashsize;
+
+ ppchameleon_map.size = flash_size;
+ ppchameleon_map.phys = flash_base;
+ ppchameleon_map.virt =
+ (void __iomem *)ioremap(flash_base, ppchameleon_map.size);
+
+ if (!ppchameleon_map.virt) {
+ printk("Failed to ioremap flash.\n");
+ return -EIO;
+ }
+
+ simple_map_init(&ppchameleon_map);
+
+ flash = do_map_probe("cfi_probe", &ppchameleon_map);
+ if (flash) {
+ flash->owner = THIS_MODULE;
+ add_mtd_partitions(flash, ppchameleon_partitions,
+ ARRAY_SIZE(ppchameleon_partitions));
+ } else {
+ printk("map probe failed for flash\n");
+ return -ENXIO;
+ }
+
+ return 0;
+}
+
+static void __exit cleanup_ppchameleon(void)
+{
+ if (flash) {
+ del_mtd_partitions(flash);
+ map_destroy(flash);
+ }
+
+ if (ppchameleon_map.virt) {
+ iounmap((void *)ppchameleon_map.virt);
+ ppchameleon_map.virt = 0;
+ }
+}
+
+module_init(init_ppchameleon);
+module_exit(cleanup_ppchameleon);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Wolfgang Denk <wd at denx.de>");
+MODULE_DESCRIPTION("MTD map and partitions for DAVE PPChameleonEVB boards");
diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -75,10 +75,10 @@ config MTD_NAND_RTC_FROM4
flash interface board (FROM_BOARD4)
config MTD_NAND_PPCHAMELEONEVB
- tristate "NAND Flash device on PPChameleonEVB board"
- depends on PPCHAMELEONEVB && MTD_NAND
+ tristate "NAND Flash device on DAVE PPChameleonEVB board"
+ depends on PPChameleonEVB && MTD_NAND
help
- This enables the NAND flash driver on the PPChameleon EVB Board.
+ This enables the NAND flash driver on the DAVE PPChameleonEVB Board.
config MTD_NAND_S3C2410
tristate "NAND Flash support for S3C2410/S3C2440 SoC"
diff --git a/drivers/mtd/nand/ppchameleonevb.c b/drivers/mtd/nand/ppchameleonevb.c
--- a/drivers/mtd/nand/ppchameleonevb.c
+++ b/drivers/mtd/nand/ppchameleonevb.c
@@ -1,6 +1,7 @@
/*
* drivers/mtd/nand/ppchameleonevb.c
*
+ * Copyright (C) 2005 Wolfgang Denk <wd at denx.de>
* Copyright (C) 2003 DAVE Srl (info at wawnet.biz)
*
* Derived from drivers/mtd/nand/edb7312.c
@@ -30,7 +31,7 @@
#include <linux/mtd/nand.h>
#include <linux/mtd/partitions.h>
#include <asm/io.h>
-#include <platforms/PPChameleonEVB.h>
+#include <platforms/4xx/ppchameleon.h>
#undef USE_READY_BUSY_PIN
#define USE_READY_BUSY_PIN
@@ -41,8 +42,9 @@
/* handy sizes */
#define SZ_4M 0x00400000
#define NAND_SMALL_SIZE 0x02000000
-#define NAND_MTD_NAME "ppchameleon-nand"
-#define NAND_EVB_MTD_NAME "ppchameleonevb-nand"
+
+#define NAND_MTD_NAME "ppchameleon-nand"
+#define NAND_EVB_MTD_NAME "ppchameleonevb-nand"
/* GPIO pins used to drive NAND chip mounted on processor module */
#define NAND_nCE_GPIO_PIN (0x80000000 >> 1)
@@ -50,51 +52,46 @@
#define NAND_ALE_GPIO_PIN (0x80000000 >> 3)
#define NAND_RB_GPIO_PIN (0x80000000 >> 4)
/* GPIO pins used to drive NAND chip mounted on EVB */
-#define NAND_EVB_nCE_GPIO_PIN (0x80000000 >> 14)
-#define NAND_EVB_CLE_GPIO_PIN (0x80000000 >> 15)
-#define NAND_EVB_ALE_GPIO_PIN (0x80000000 >> 16)
-#define NAND_EVB_RB_GPIO_PIN (0x80000000 >> 31)
+#define NAND_EVB_nCE_GPIO_PIN (0x80000000 >> 14)
+#define NAND_EVB_CLE_GPIO_PIN (0x80000000 >> 15)
+#define NAND_EVB_ALE_GPIO_PIN (0x80000000 >> 16)
+#define NAND_EVB_RB_GPIO_PIN (0x80000000 >> 31)
/*
* MTD structure for PPChameleonEVB board
*/
-static struct mtd_info *ppchameleon_mtd = NULL;
+static struct mtd_info *ppchameleon_mtd = NULL;
static struct mtd_info *ppchameleonevb_mtd = NULL;
/*
* Module stuff
*/
-static unsigned long ppchameleon_fio_pbase = CFG_NAND0_PADDR;
+static unsigned long ppchameleon_fio_pbase = CFG_NAND0_PADDR;
static unsigned long ppchameleonevb_fio_pbase = CFG_NAND1_PADDR;
-#ifdef MODULE
-module_param(ppchameleon_fio_pbase, ulong, 0);
-module_param(ppchameleonevb_fio_pbase, ulong, 0);
-#else
-__setup("ppchameleon_fio_pbase=",ppchameleon_fio_pbase);
-__setup("ppchameleonevb_fio_pbase=",ppchameleonevb_fio_pbase);
-#endif
-
#ifdef CONFIG_MTD_PARTITIONS
/*
* Define static partitions for flash devices
*/
static struct mtd_partition partition_info_hi[] = {
- { name: "PPChameleon HI Nand Flash",
- offset: 0,
- size: 128*1024*1024 }
+ { name: "PPChameleon HI Nand Flash",
+ offset: 0,
+ size: 128*1024*1024
+ },
};
static struct mtd_partition partition_info_me[] = {
- { name: "PPChameleon ME Nand Flash",
- offset: 0,
- size: 32*1024*1024 }
+ { name: "PPChameleon ME Nand Flash",
+ offset: 0,
+ size: 32*1024*1024
+ },
};
static struct mtd_partition partition_info_evb[] = {
- { name: "PPChameleonEVB Nand Flash",
- offset: 0,
- size: 32*1024*1024 }
+ { name: "PPChameleonEVB Nand Flash",
+ offset: 0,
+ size: 32*1024*1024
+ },
};
#define NUM_PARTITIONS 1
@@ -405,9 +402,9 @@ static void __exit ppchameleonevb_cleanu
/* Release iomaps */
this = (struct nand_chip *) &ppchameleon_mtd[1];
- iounmap((void *) this->IO_ADDR_R;
+ iounmap((void *) this->IO_ADDR_R);
this = (struct nand_chip *) &ppchameleonevb_mtd[1];
- iounmap((void *) this->IO_ADDR_R;
+ iounmap((void *) this->IO_ADDR_R);
/* Free the MTD device structure */
kfree (ppchameleon_mtd);
@@ -417,4 +414,4 @@ module_exit(ppchameleonevb_cleanup);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("DAVE Srl <support-ppchameleon at dave-tech.it>");
-MODULE_DESCRIPTION("MTD map driver for DAVE Srl PPChameleonEVB board");
+MODULE_DESCRIPTION("MTD NAND flash driver for DAVE Srl PPChameleonEVB board");
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