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