[PATCH] MTD: Add support for the PM82x Boards.
Heiko Schocher
hs at denx.de
Mon Nov 21 05:34:12 EST 2005
Hello,
the following Patch (against 2.6 kernel.org tree, COMMIT_ID:
f093182d313edde9b1f86dbdaf40ba4da2dbd0e7) adds support for
the NOR flashes and for the DiskOnChip on the PM82X Boards
from Microsys.
Signed-off-by: Heiko Schocher <hs at denx.de>
---
drivers/mtd/chips/jedec_probe.c | 50 +++++
drivers/mtd/devices/docprobe.c | 4
drivers/mtd/maps/Kconfig | 6 +
drivers/mtd/maps/Makefile | 1
drivers/mtd/maps/pm82x.c | 360
+++++++++++++++++++++++++++++++++++++++
drivers/mtd/nand/diskonchip.c | 4
6 files changed, 425 insertions(+), 0 deletions(-)
diff --git a/drivers/mtd/chips/jedec_probe.c
b/drivers/mtd/chips/jedec_probe.c
index edb306c..e230127 100644
--- a/drivers/mtd/chips/jedec_probe.c
+++ b/drivers/mtd/chips/jedec_probe.c
@@ -104,6 +104,11 @@
#define I28F320B3B 0x8897
#define I28F640B3T 0x8898
#define I28F640B3B 0x8899
+#define I28F640C3B 0x88CD
+#define I28F160F3T 0x88F3
+#define I28F160F3B 0x88F4
+#define I28F160C3T 0x88C2
+#define I28F160C3B 0x88C3
#define I82802AB 0x00ad
#define I82802AC 0x00ac
@@ -1080,6 +1085,51 @@ static const struct amd_flash_info jedec
}
}, {
.mfr_id = MANUFACTURER_INTEL,
+ .dev_id = I28F640C3B,
+ .name = "Intel 28F640C3B",
+ .uaddr = {
+ [0] = MTD_UADDR_UNNECESSARY, /* x8 */
+ [1] = MTD_UADDR_UNNECESSARY, /* x16 */
+ },
+ .DevSize = SIZE_8MiB,
+ .CmdSet = P_ID_INTEL_STD,
+ .NumEraseRegions= 2,
+ .regions = {
+ ERASEINFO(0x02000, 8),
+ ERASEINFO(0x10000, 127),
+ }
+ }, {
+ .mfr_id = MANUFACTURER_INTEL,
+ .dev_id = I28F160C3B,
+ .name = "Intel 28F160C3B",
+ .uaddr = {
+ [0] = MTD_UADDR_UNNECESSARY, /* x8 */
+ [1] = MTD_UADDR_UNNECESSARY, /* x16 */
+ },
+ .DevSize = SIZE_2MiB,
+ .CmdSet = P_ID_INTEL_STD,
+ .NumEraseRegions= 2,
+ .regions = {
+ ERASEINFO(0x02000, 8),
+ ERASEINFO(0x10000, 31),
+ }
+ }, {
+ .mfr_id = MANUFACTURER_INTEL,
+ .dev_id = I28F160C3T,
+ .name = "Intel 28F160C3T",
+ .uaddr = {
+ [0] = MTD_UADDR_UNNECESSARY, /* x8 */
+ [1] = MTD_UADDR_UNNECESSARY, /* x16 */
+ },
+ .DevSize = SIZE_2MiB,
+ .CmdSet = P_ID_INTEL_STD,
+ .NumEraseRegions= 2,
+ .regions = {
+ ERASEINFO(0x10000, 31),
+ ERASEINFO(0x02000, 8),
+ }
+ }, {
+ .mfr_id = MANUFACTURER_INTEL,
.dev_id = I82802AB,
.name = "Intel 82802AB",
.uaddr = {
diff --git a/drivers/mtd/devices/docprobe.c b/drivers/mtd/devices/docprobe.c
index 13178b9..b051bc7 100644
--- a/drivers/mtd/devices/docprobe.c
+++ b/drivers/mtd/devices/docprobe.c
@@ -81,7 +81,11 @@ static unsigned long __initdata doc_loca
0xe8000, 0xea000, 0xec000, 0xee000,
#endif /* CONFIG_MTD_DOCPROBE_HIGH */
#elif defined(__PPC__)
+#if defined(CONFIG_PM82X)
+ 0xff800000,
+#else
0xe4000000,
+#endif
#elif defined(CONFIG_MOMENCO_OCELOT)
0x2f000000,
0xff000000,
diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig
index 846a533..237abe8 100644
--- a/drivers/mtd/maps/Kconfig
+++ b/drivers/mtd/maps/Kconfig
@@ -256,6 +256,12 @@ config MTD_SBC8240
Flash access on the SBC8240 board from Wind River. See
<http://www.windriver.com/products/sbc8240/>
+config MTD_PM82X
+ tristate "Flash device on PM82X Boards"
+ depends on PPC32 && 6xx && 8260 && MTD_COMPLEX_MAPPINGS && MTD_PARTITIONS
+ help
+ Flash access on the PM82X boards from Microsys.
+
config MTD_TQM8XXL
tristate "CFI Flash device mapped on TQM8XXL"
depends on MTD_CFI && TQM8xxL
diff --git a/drivers/mtd/maps/Makefile b/drivers/mtd/maps/Makefile
index 7d9e940..ecdc515 100644
--- a/drivers/mtd/maps/Makefile
+++ b/drivers/mtd/maps/Makefile
@@ -73,3 +73,4 @@ obj-$(CONFIG_MTD_OMAP_NOR) += omap_nor.o
obj-$(CONFIG_MTD_PQ2FADS) += pq2fads.o
obj-$(CONFIG_MTD_MTX1) += mtx-1_flash.o
obj-$(CONFIG_MTD_TQM834x) += tqm834x.o
+obj-$(CONFIG_MTD_PM82X) += pm82x.o
diff --git a/drivers/mtd/maps/pm82x.c b/drivers/mtd/maps/pm82x.c
new file mode 100644
index 0000000..dc0bc48
--- /dev/null
+++ b/drivers/mtd/maps/pm82x.c
@@ -0,0 +1,360 @@
+/*
+ * Copyright(C) 2005
+ * Wolfgang Denk, DENX Software Engineering, <wd at denx.de>
+ *
+ * Copyright(C) 2005
+ * Josef Wagner, MicroSys GmbH <wagner at microsys.de>
+ *
+ * This code is GPLed
+ *
+ */
+
+/*
+ * PM825/PM826 uses 4 x Intel 28F160C3B (16 Mbit)
+ * 4 x Intel 28F160C3 (16 Mbit) in one bank (64 bit bankwidth)
+ * for a total of 8MB flash
+ *
+ * PM827/PM828 uses 4 x Intel 28F640C3 (64 Mbit)
+ * in one bank (64 bit bankwidth)
+ * for a total of 32MB flash
+
+ * Thus we have to chose:
+ * - Support 64-bit bankwidth => CONFIG_MTD_CFI_B8
+ * - Support 4-chip flash interleave => CONFIG_MTD_CFI_I4
+*/
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <asm/io.h>
+#include <asm/ppcboot.h>
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+
+#if 0 /* Debugging turned off */
+# define debugk(fmt,args...) printk(fmt ,##args)
+#else
+# define debugk(fmt,args...)
+#endif
+
+#define FLASH_BANK_MAX 1
+
+/* The "residual" data board information structure the boot loader
+ * hands to us.
+ */
+extern unsigned char __res[];
+
+/* trivial struct to describe partition information */
+struct mtd_part_def
+{
+ int nums;
+ unsigned char *type;
+ struct mtd_partition* mtd_part;
+};
+
+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 unsigned long start_scan_addr;
+
+static map_word pm82x_read64(struct map_info *map, unsigned long ofs)
+{
+ map_word val;
+ val.x[0] = *((volatile __u32 *)(map->map_priv_1 + ofs));
+ val.x[1] = *(((volatile __u32 *)(map->map_priv_1 + ofs)) + 1);
+ return val;
+}
+
+static void pm82x_copy_from(struct map_info *map,
+ void *to, unsigned long from, ssize_t len)
+{
+ memcpy_fromio(to, (void *)(map->map_priv_1 + from), len);
+}
+
+static void pm82x_write64 (struct map_info *map, map_word map_d,
+ unsigned long adr)
+{
+ ulong addr = map->map_priv_1 + adr;
+ __u64 d = ((__u64)map_d.x[0] << 32) + map_d.x[1];
+ __u64 * data = &d;
+ ulong flags;
+ volatile ulong msr;
+ ulong saved_msr;
+ volatile long saved_fr[2];
+
+ local_irq_save (flags);
+
+ __asm__ __volatile__ ("mfmsr %0" : "=r" (msr):);
+ saved_msr = msr;
+ msr |= MSR_FP;
+ msr &= ~(MSR_FE0 | MSR_FE1);
+
+ __asm__ __volatile__ (
+ "mtmsr %0\n"
+ "isync\n"
+ :
+ : "r" (msr));
+
+ __asm__ __volatile__ (
+ "stfd 1, 0(%2)\n"
+ "lfd 1, 0(%0)\n"
+ "stfd 1, 0(%1)\n"
+ "lfd 1, 0(%2)\n"
+ :
+ : "r" (data), "r" (addr), "b" (saved_fr)
+ );
+
+ __asm__ __volatile__ (
+ "mtmsr %0\n"
+ "isync\n"
+ :
+ : "r" (saved_msr));
+
+ local_irq_restore (flags);
+}
+
+static void pm82x_copy_to(struct map_info *map,
+ unsigned long to, const void *from, ssize_t len)
+{
+ memcpy_toio((void *)(map->map_priv_1 + to), from, len);
+}
+
+/*
+ * The following defines the partition layout of PM825/PM826 boards.
+ *
+ * See include/linux/mtd/partitions.h for definition of the
+ * mtd_partition structure.
+ *
+ */
+
+#ifdef CONFIG_MTD_PARTITIONS
+/* partition definition for first (and only) flash bank
+ * also ref. to "drivers/char/flash_config.c"
+ */
+static struct mtd_partition pm82x_partitions_8M[] = {
+ {
+ name: "U-Boot", /* U-Boot image */
+ offset: 0x00000000,
+ size: 0x00040000, /* 256 KB */
+ },
+ {
+ name: "kernel", /* Linux kernel image */
+ offset: 0x00040000,
+ size: 0x000C0000, /* 768 KB */
+ },
+ {
+ name: "ramdisk", /* Ramdisk image */
+ offset: 0x00100000,
+ size: 0x00300000, /* 3 MB */
+ },
+ {
+ name: "user", /* User file system */
+ offset: 0x00400000,
+ size: 0x00400000, /* 4 MB */
+ },
+};
+
+static struct mtd_partition pm82x_partitions_32M[] = {
+ {
+ name: "U-Boot", /* U-Boot image */
+ offset: 0x00000000,
+ size: 0x00040000, /* 256 KB */
+ },
+ {
+ name: "kernel", /* Linux kernel image */
+ offset: 0x00040000,
+ size: 0x000C0000, /* 768 KB */
+ },
+ {
+ name: "ramdisk", /* Ramdisk image */
+ offset: 0x00100000,
+ size: 0x00300000, /* 3 MB */
+ },
+ {
+ name: "user", /* User file system */
+ offset: 0x00400000,
+ size: 0x01C00000, /* 28 MB */
+ },
+};
+
+#endif /* CONFIG_MTD_PARTITIONS */
+
+#define NB_OF(x) (sizeof (x) / sizeof (x[0]))
+
+int __init init_pm82x_mtd(void)
+{
+ int idx = 0, ret = 0;
+ unsigned long flash_addr, flash_size, mtd_size = 0;
+
+ /* pointer to PM82x board info data */
+ bd_t *bd = (bd_t *)__res;
+
+#ifdef CONFIG_MTD_CMDLINE_PARTS
+ int n;
+ char mtdid[10];
+ const char *part_probes[] = { "cmdlinepart", NULL };
+#endif
+
+ flash_addr = bd->bi_flashstart;
+ flash_size = bd->bi_flashsize;
+
+ /* request maximum flash size address space */
+ start_scan_addr = (unsigned long)ioremap(flash_addr, flash_size);
+ if (!start_scan_addr) {
+ printk("%s: Failed to ioremap address: 0x%lx\n",
+ __FUNCTION__, flash_addr);
+ return -EIO;
+ }
+
+ for(idx = 0 ; idx < FLASH_BANK_MAX ; idx++) {
+ if (mtd_size >= flash_size)
+ break;
+
+ debugk ("%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;
+ 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 == NULL) {
+ ret = -ENOMEM;
+ goto error_mem;
+ }
+ memset((void *)map_banks[idx]->name, 0, 16);
+
+ sprintf(map_banks[idx]->name, "PM82x-%d", idx);
+ map_banks[idx]->size = flash_size;
+ map_banks[idx]->bankwidth = 8;
+ map_banks[idx]->read = pm82x_read64;
+ map_banks[idx]->copy_from = pm82x_copy_from;
+ map_banks[idx]->write = pm82x_write64;
+ map_banks[idx]->copy_to = pm82x_copy_to;
+ map_banks[idx]->map_priv_1=
+ start_scan_addr + ((idx > 0) ?
+ (mtd_banks[idx-1] ? mtd_banks[idx-1]->size : 0) : 0);
+
+ /* start to probe flash chips */
+ mtd_banks[idx] = do_map_probe("jedec_probe", map_banks[idx]);
+ if (mtd_banks[idx]) {
+ mtd_banks[idx]->owner = THIS_MODULE;
+ mtd_size += mtd_banks[idx]->size;
+ num_banks++;
+ debugk ("%s: bank %ld, name: %s, size: %d bytes \n",
+ __FUNCTION__,
+ num_banks,
+ mtd_banks[idx]->name,
+ mtd_banks[idx]->size);
+ }
+ }
+
+ /* no supported flash chips found */
+ if (!num_banks) {
+ printk("PM82x: No supported flash chips found!\n");
+ ret = -ENXIO;
+ goto error_mem;
+ }
+
+#ifdef CONFIG_MTD_PARTITIONS
+ /*
+ * Select static partition definitions
+ */
+ if (flash_size == 0x800000) {
+ part_banks[0].mtd_part = pm82x_partitions_8M;
+ part_banks[0].nums = NB_OF(pm82x_partitions_8M);
+ } else {
+ part_banks[0].mtd_part = pm82x_partitions_32M;
+ part_banks[0].nums = NB_OF(pm82x_partitions_32M);
+ }
+ part_banks[0].type = "static image";
+
+ for(idx = 0; idx < num_banks ; idx++) {
+#ifdef CONFIG_MTD_CMDLINE_PARTS
+ sprintf(mtdid, "%d", idx);
+ n = parse_mtd_partitions(mtd_banks[idx],
+ part_probes,
+ &part_banks[idx].mtd_part,
+ 0);
+ debugk ("%s: %d command line partitions on bank %s\n",
+ __FUNCTION__, n, mtdid);
+ if (n > 0) {
+ part_banks[idx].type = "command line";
+ part_banks[idx].nums = n;
+ }
+#endif /* CONFIG_MTD_CMDLINE_PARTS */
+
+ if (part_banks[idx].nums == 0) {
+ printk (KERN_NOTICE
+ "PM82x flash bank %d: no partition info "
+ "available, registering whole device\n", idx);
+ add_mtd_device(mtd_banks[idx]);
+ } else {
+ printk (KERN_NOTICE
+ "PM82x flash bank %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 /* ! CONFIG_MTD_PARTITIONS */
+ printk (KERN_NOTICE "PM82x flash: registering %d flash banks "
+ "at once\n", num_banks);
+
+ for(idx = 0 ; idx < num_banks ; idx++) {
+ add_mtd_device(mtd_banks[idx]);
+ }
+#endif /* CONFIG_MTD_PARTITIONS */
+
+ 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;
+ }
+ }
+
+ iounmap((void *)start_scan_addr);
+
+ return ret;
+}
+
+static void __exit cleanup_pm82x_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((void *)start_scan_addr);
+ start_scan_addr = 0;
+ }
+}
+
+module_init(init_pm82x_mtd);
+module_exit(cleanup_pm82x_mtd);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Wolfgang Denk <wd at denx.de>");
+MODULE_DESCRIPTION("MTD map driver for PM82x boards");
diff --git a/drivers/mtd/nand/diskonchip.c b/drivers/mtd/nand/diskonchip.c
index 21d4e8f..bf7cf54 100644
--- a/drivers/mtd/nand/diskonchip.c
+++ b/drivers/mtd/nand/diskonchip.c
@@ -55,7 +55,11 @@ static unsigned long __initdata doc_loca
0xe8000, 0xea000, 0xec000, 0xee000,
#endif /* CONFIG_MTD_DOCPROBE_HIGH */
#elif defined(__PPC__)
+#if defined(CONFIG_PM82X)
+ 0xff800000,
+#else
0xe4000000,
+#endif
#elif defined(CONFIG_MOMENCO_OCELOT)
0x2f000000,
0xff000000,
!-------------------------------------------------------------flip-
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