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path: root/drivers/mtd/maps/ipaq-flash.c
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Diffstat (limited to 'drivers/mtd/maps/ipaq-flash.c')
-rw-r--r--drivers/mtd/maps/ipaq-flash.c464
1 files changed, 464 insertions, 0 deletions
diff --git a/drivers/mtd/maps/ipaq-flash.c b/drivers/mtd/maps/ipaq-flash.c
new file mode 100644
index 00000000000..71240181084
--- /dev/null
+++ b/drivers/mtd/maps/ipaq-flash.c
@@ -0,0 +1,464 @@
+/*
+ * Flash memory access on iPAQ Handhelds (either SA1100 or PXA250 based)
+ *
+ * (C) 2000 Nicolas Pitre <nico@cam.org>
+ * (C) 2002 Hewlett-Packard Company <jamey.hicks@hp.com>
+ * (C) 2003 Christian Pellegrin <chri@ascensit.com>, <chri@infis.univ.ts.it>: concatenation of multiple flashes
+ *
+ * $Id: ipaq-flash.c,v 1.3 2004/11/04 13:24:15 gleixner Exp $
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/spinlock.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <asm/page.h>
+#include <asm/mach-types.h>
+#include <asm/system.h>
+#include <asm/errno.h>
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+#ifdef CONFIG_MTD_CONCAT
+#include <linux/mtd/concat.h>
+#endif
+
+#include <asm/hardware.h>
+#include <asm/arch-sa1100/h3600.h>
+#include <asm/io.h>
+
+
+#ifndef CONFIG_IPAQ_HANDHELD
+#error This is for iPAQ Handhelds only
+#endif
+#ifdef CONFIG_SA1100_JORNADA56X
+
+static void jornada56x_set_vpp(struct map_info *map, int vpp)
+{
+ if (vpp)
+ GPSR = GPIO_GPIO26;
+ else
+ GPCR = GPIO_GPIO26;
+ GPDR |= GPIO_GPIO26;
+}
+
+#endif
+
+#ifdef CONFIG_SA1100_JORNADA720
+
+static void jornada720_set_vpp(struct map_info *map, int vpp)
+{
+ if (vpp)
+ PPSR |= 0x80;
+ else
+ PPSR &= ~0x80;
+ PPDR |= 0x80;
+}
+
+#endif
+
+#define MAX_IPAQ_CS 2 /* Number of CS we are going to test */
+
+#define IPAQ_MAP_INIT(X) \
+ { \
+ name: "IPAQ flash " X, \
+ }
+
+
+static struct map_info ipaq_map[MAX_IPAQ_CS] = {
+ IPAQ_MAP_INIT("bank 1"),
+ IPAQ_MAP_INIT("bank 2")
+};
+
+static struct mtd_info *my_sub_mtd[MAX_IPAQ_CS] = {
+ NULL,
+ NULL
+};
+
+/*
+ * Here are partition information for all known IPAQ-based 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 be no more than
+ * the value specified in the "struct map_desc *_io_desc" mapping
+ * definition for the corresponding machine.
+ *
+ * Please keep these in alphabetical order, and formatted as per existing
+ * entries. Thanks.
+ */
+
+#ifdef CONFIG_IPAQ_HANDHELD
+static unsigned long h3xxx_max_flash_size = 0x04000000;
+static struct mtd_partition h3xxx_partitions[] = {
+ {
+ name: "H3XXX boot firmware",
+#ifndef CONFIG_LAB
+ size: 0x00040000,
+#else
+ size: 0x00080000,
+#endif
+ offset: 0,
+#ifndef CONFIG_LAB
+ mask_flags: MTD_WRITEABLE, /* force read-only */
+#endif
+ },
+ {
+ name: "H3XXX root jffs2",
+#ifndef CONFIG_LAB
+ size: 0x2000000 - 2*0x40000, /* Warning, this is fixed later */
+ offset: 0x00040000,
+#else
+ size: 0x2000000 - 0x40000 - 0x80000, /* Warning, this is fixed later */
+ offset: 0x00080000,
+#endif
+ },
+ {
+ name: "asset",
+ size: 0x40000,
+ offset: 0x2000000 - 0x40000, /* Warning, this is fixed later */
+ mask_flags: MTD_WRITEABLE, /* force read-only */
+ }
+};
+
+#ifndef CONFIG_MTD_CONCAT
+static struct mtd_partition h3xxx_partitions_bank2[] = {
+ /* this is used only on 2 CS machines when concat is not present */
+ {
+ name: "second H3XXX root jffs2",
+ size: 0x1000000 - 0x40000, /* Warning, this is fixed later */
+ offset: 0x00000000,
+ },
+ {
+ name: "second asset",
+ size: 0x40000,
+ offset: 0x1000000 - 0x40000, /* Warning, this is fixed later */
+ mask_flags: MTD_WRITEABLE, /* force read-only */
+ }
+};
+#endif
+
+static DEFINE_SPINLOCK(ipaq_vpp_lock);
+
+static void h3xxx_set_vpp(struct map_info *map, int vpp)
+{
+ static int nest = 0;
+
+ spin_lock(&ipaq_vpp_lock);
+ if (vpp)
+ nest++;
+ else
+ nest--;
+ if (nest)
+ assign_h3600_egpio(IPAQ_EGPIO_VPP_ON, 1);
+ else
+ assign_h3600_egpio(IPAQ_EGPIO_VPP_ON, 0);
+ spin_unlock(&ipaq_vpp_lock);
+}
+
+#endif
+
+#if defined(CONFIG_SA1100_JORNADA56X) || defined(CONFIG_SA1100_JORNADA720)
+static unsigned long jornada_max_flash_size = 0x02000000;
+static struct mtd_partition jornada_partitions[] = {
+ {
+ name: "Jornada boot firmware",
+ size: 0x00040000,
+ offset: 0,
+ mask_flags: MTD_WRITEABLE, /* force read-only */
+ }, {
+ name: "Jornada root jffs2",
+ size: MTDPART_SIZ_FULL,
+ offset: 0x00040000,
+ }
+};
+#endif
+
+
+static struct mtd_partition *parsed_parts;
+static struct mtd_info *mymtd;
+
+static unsigned long cs_phys[] = {
+#ifdef CONFIG_ARCH_SA1100
+ SA1100_CS0_PHYS,
+ SA1100_CS1_PHYS,
+ SA1100_CS2_PHYS,
+ SA1100_CS3_PHYS,
+ SA1100_CS4_PHYS,
+ SA1100_CS5_PHYS,
+#else
+ PXA_CS0_PHYS,
+ PXA_CS1_PHYS,
+ PXA_CS2_PHYS,
+ PXA_CS3_PHYS,
+ PXA_CS4_PHYS,
+ PXA_CS5_PHYS,
+#endif
+};
+
+static const char *part_probes[] = { "cmdlinepart", "RedBoot", NULL };
+
+static int __init h1900_special_case(void);
+
+int __init ipaq_mtd_init(void)
+{
+ struct mtd_partition *parts = NULL;
+ int nb_parts = 0;
+ int parsed_nr_parts = 0;
+ const char *part_type;
+ int i; /* used when we have >1 flash chips */
+ unsigned long tot_flashsize = 0; /* used when we have >1 flash chips */
+
+ /* Default flash bankwidth */
+ // ipaq_map.bankwidth = (MSC0 & MSC_RBW) ? 2 : 4;
+
+ if (machine_is_h1900())
+ {
+ /* For our intents, the h1900 is not a real iPAQ, so we special-case it. */
+ return h1900_special_case();
+ }
+
+ if (machine_is_h3100() || machine_is_h1900())
+ for(i=0; i<MAX_IPAQ_CS; i++)
+ ipaq_map[i].bankwidth = 2;
+ else
+ for(i=0; i<MAX_IPAQ_CS; i++)
+ ipaq_map[i].bankwidth = 4;
+
+ /*
+ * Static partition definition selection
+ */
+ part_type = "static";
+
+ simple_map_init(&ipaq_map[0]);
+ simple_map_init(&ipaq_map[1]);
+
+#ifdef CONFIG_IPAQ_HANDHELD
+ if (machine_is_ipaq()) {
+ parts = h3xxx_partitions;
+ nb_parts = ARRAY_SIZE(h3xxx_partitions);
+ for(i=0; i<MAX_IPAQ_CS; i++) {
+ ipaq_map[i].size = h3xxx_max_flash_size;
+ ipaq_map[i].set_vpp = h3xxx_set_vpp;
+ ipaq_map[i].phys = cs_phys[i];
+ ipaq_map[i].virt = __ioremap(cs_phys[i], 0x04000000, 0, 1);
+ if (machine_is_h3100 () || machine_is_h1900())
+ ipaq_map[i].bankwidth = 2;
+ }
+ if (machine_is_h3600()) {
+ /* No asset partition here */
+ h3xxx_partitions[1].size += 0x40000;
+ nb_parts--;
+ }
+ }
+#endif
+#ifdef CONFIG_ARCH_H5400
+ if (machine_is_h5400()) {
+ ipaq_map[0].size = 0x02000000;
+ ipaq_map[1].size = 0x02000000;
+ ipaq_map[1].phys = 0x02000000;
+ ipaq_map[1].virt = ipaq_map[0].virt + 0x02000000;
+ }
+#endif
+#ifdef CONFIG_ARCH_H1900
+ if (machine_is_h1900()) {
+ ipaq_map[0].size = 0x00400000;
+ ipaq_map[1].size = 0x02000000;
+ ipaq_map[1].phys = 0x00080000;
+ ipaq_map[1].virt = ipaq_map[0].virt + 0x00080000;
+ }
+#endif
+
+#ifdef CONFIG_SA1100_JORNADA56X
+ if (machine_is_jornada56x()) {
+ parts = jornada_partitions;
+ nb_parts = ARRAY_SIZE(jornada_partitions);
+ ipaq_map[0].size = jornada_max_flash_size;
+ ipaq_map[0].set_vpp = jornada56x_set_vpp;
+ ipaq_map[0].virt = (__u32)__ioremap(0x0, 0x04000000, 0, 1);
+ }
+#endif
+#ifdef CONFIG_SA1100_JORNADA720
+ if (machine_is_jornada720()) {
+ parts = jornada_partitions;
+ nb_parts = ARRAY_SIZE(jornada_partitions);
+ ipaq_map[0].size = jornada_max_flash_size;
+ ipaq_map[0].set_vpp = jornada720_set_vpp;
+ }
+#endif
+
+
+ if (machine_is_ipaq()) { /* for iPAQs only */
+ for(i=0; i<MAX_IPAQ_CS; i++) {
+ printk(KERN_NOTICE "iPAQ flash: probing %d-bit flash bus, window=%lx with CFI.\n", ipaq_map[i].bankwidth*8, ipaq_map[i].virt);
+ my_sub_mtd[i] = do_map_probe("cfi_probe", &ipaq_map[i]);
+ if (!my_sub_mtd[i]) {
+ printk(KERN_NOTICE "iPAQ flash: probing %d-bit flash bus, window=%lx with JEDEC.\n", ipaq_map[i].bankwidth*8, ipaq_map[i].virt);
+ my_sub_mtd[i] = do_map_probe("jedec_probe", &ipaq_map[i]);
+ }
+ if (!my_sub_mtd[i]) {
+ printk(KERN_NOTICE "iPAQ flash: failed to find flash.\n");
+ if (i)
+ break;
+ else
+ return -ENXIO;
+ } else
+ printk(KERN_NOTICE "iPAQ flash: found %d bytes\n", my_sub_mtd[i]->size);
+
+ /* do we really need this debugging? --joshua 20030703 */
+ // printk("my_sub_mtd[%d]=%p\n", i, my_sub_mtd[i]);
+ my_sub_mtd[i]->owner = THIS_MODULE;
+ tot_flashsize += my_sub_mtd[i]->size;
+ }
+#ifdef CONFIG_MTD_CONCAT
+ /* fix the asset location */
+# ifdef CONFIG_LAB
+ h3xxx_partitions[1].size = tot_flashsize - 0x40000 - 0x80000 /* extra big boot block */;
+# else
+ h3xxx_partitions[1].size = tot_flashsize - 2 * 0x40000;
+# endif
+ h3xxx_partitions[2].offset = tot_flashsize - 0x40000;
+ /* and concat the devices */
+ mymtd = mtd_concat_create(&my_sub_mtd[0], i,
+ "ipaq");
+ if (!mymtd) {
+ printk("Cannot create iPAQ concat device\n");
+ return -ENXIO;
+ }
+#else
+ mymtd = my_sub_mtd[0];
+
+ /*
+ *In the very near future, command line partition parsing
+ * will use the device name as 'mtd-id' instead of a value
+ * passed to the parse_cmdline_partitions() routine. Since
+ * the bootldr says 'ipaq', make sure it continues to work.
+ */
+ mymtd->name = "ipaq";
+
+ if ((machine_is_h3600())) {
+# ifdef CONFIG_LAB
+ h3xxx_partitions[1].size = my_sub_mtd[0]->size - 0x80000;
+# else
+ h3xxx_partitions[1].size = my_sub_mtd[0]->size - 0x40000;
+# endif
+ nb_parts = 2;
+ } else {
+# ifdef CONFIG_LAB
+ h3xxx_partitions[1].size = my_sub_mtd[0]->size - 0x40000 - 0x80000; /* extra big boot block */
+# else
+ h3xxx_partitions[1].size = my_sub_mtd[0]->size - 2*0x40000;
+# endif
+ h3xxx_partitions[2].offset = my_sub_mtd[0]->size - 0x40000;
+ }
+
+ if (my_sub_mtd[1]) {
+# ifdef CONFIG_LAB
+ h3xxx_partitions_bank2[0].size = my_sub_mtd[1]->size - 0x80000;
+# else
+ h3xxx_partitions_bank2[0].size = my_sub_mtd[1]->size - 0x40000;
+# endif
+ h3xxx_partitions_bank2[1].offset = my_sub_mtd[1]->size - 0x40000;
+ }
+#endif
+ }
+ else {
+ /*
+ * Now let's probe for the actual flash. Do it here since
+ * specific machine settings might have been set above.
+ */
+ printk(KERN_NOTICE "IPAQ flash: probing %d-bit flash bus, window=%lx\n", ipaq_map[0].bankwidth*8, ipaq_map[0].virt);
+ mymtd = do_map_probe("cfi_probe", &ipaq_map[0]);
+ if (!mymtd)
+ return -ENXIO;
+ mymtd->owner = THIS_MODULE;
+ }
+
+
+ /*
+ * Dynamic partition selection stuff (might override the static ones)
+ */
+
+ i = parse_mtd_partitions(mymtd, part_probes, &parsed_parts, 0);
+
+ if (i > 0) {
+ nb_parts = parsed_nr_parts = i;
+ parts = parsed_parts;
+ part_type = "dynamic";
+ }
+
+ if (!parts) {
+ printk(KERN_NOTICE "IPAQ flash: no partition info available, registering whole flash at once\n");
+ add_mtd_device(mymtd);
+#ifndef CONFIG_MTD_CONCAT
+ if (my_sub_mtd[1])
+ add_mtd_device(my_sub_mtd[1]);
+#endif
+ } else {
+ printk(KERN_NOTICE "Using %s partition definition\n", part_type);
+ add_mtd_partitions(mymtd, parts, nb_parts);
+#ifndef CONFIG_MTD_CONCAT
+ if (my_sub_mtd[1])
+ add_mtd_partitions(my_sub_mtd[1], h3xxx_partitions_bank2, ARRAY_SIZE(h3xxx_partitions_bank2));
+#endif
+ }
+
+ return 0;
+}
+
+static void __exit ipaq_mtd_cleanup(void)
+{
+ int i;
+
+ if (mymtd) {
+ del_mtd_partitions(mymtd);
+#ifndef CONFIG_MTD_CONCAT
+ if (my_sub_mtd[1])
+ del_mtd_partitions(my_sub_mtd[1]);
+#endif
+ map_destroy(mymtd);
+#ifdef CONFIG_MTD_CONCAT
+ for(i=0; i<MAX_IPAQ_CS; i++)
+#else
+ for(i=1; i<MAX_IPAQ_CS; i++)
+#endif
+ {
+ if (my_sub_mtd[i])
+ map_destroy(my_sub_mtd[i]);
+ }
+ if (parsed_parts)
+ kfree(parsed_parts);
+ }
+}
+
+static int __init h1900_special_case(void)
+{
+ /* The iPAQ h1900 is a special case - it has weird ROM. */
+ simple_map_init(&ipaq_map[0]);
+ ipaq_map[0].size = 0x80000;
+ ipaq_map[0].set_vpp = h3xxx_set_vpp;
+ ipaq_map[0].phys = 0x0;
+ ipaq_map[0].virt = __ioremap(0x0, 0x04000000, 0, 1);
+ ipaq_map[0].bankwidth = 2;
+
+ printk(KERN_NOTICE "iPAQ flash: probing %d-bit flash bus, window=%lx with JEDEC.\n", ipaq_map[0].bankwidth*8, ipaq_map[0].virt);
+ mymtd = do_map_probe("jedec_probe", &ipaq_map[0]);
+ if (!mymtd)
+ return -ENODEV;
+ add_mtd_device(mymtd);
+ printk(KERN_NOTICE "iPAQ flash: registered h1910 flash\n");
+
+ return 0;
+}
+
+module_init(ipaq_mtd_init);
+module_exit(ipaq_mtd_cleanup);
+
+MODULE_AUTHOR("Jamey Hicks");
+MODULE_DESCRIPTION("IPAQ CFI map driver");
+MODULE_LICENSE("MIT");
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-17 21:43:04 +0000