Merge branch 'master' of git://git.denx.de/u-boot-cfi-flash

README

@@ -2157,6 +2157,11 @@ Configuration Settings:
 		This option also enables the building of the cfi_flash driver
 		in the drivers directory
 
+- CONFIG_FLASH_CFI_MTD
+		This option enables the building of the cfi_mtd driver
+		in the drivers directory. The driver exports CFI flash
+		to the MTD layer.
+
 - CONFIG_SYS_FLASH_USE_BUFFER_WRITE
 		Use buffered writes to flash.
 

drivers/mtd/Makefile

@@ -27,6 +27,7 @@ LIB	:= $(obj)libmtd.a
 
 COBJS-$(CONFIG_HAS_DATAFLASH) += at45.o
 COBJS-$(CONFIG_FLASH_CFI_DRIVER) += cfi_flash.o
+COBJS-$(CONFIG_FLASH_CFI_MTD) += cfi_mtd.o
 COBJS-$(CONFIG_HAS_DATAFLASH) += dataflash.o
 COBJS-$(CONFIG_FLASH_CFI_LEGACY) += jedec_flash.o
 COBJS-$(CONFIG_MW_EEPROM) += mw_eeprom.o

drivers/mtd/cfi_flash.c

@@ -158,6 +158,7 @@ typedef union {
 #define NUM_ERASE_REGIONS	4 /* max. number of erase regions */
 
 static uint flash_offset_cfi[2] = { FLASH_OFFSET_CFI, FLASH_OFFSET_CFI_ALT };
+static uint flash_verbose = 1;
 
 /* use CONFIG_SYS_MAX_FLASH_BANKS_DETECT if defined */
 #ifdef CONFIG_SYS_MAX_FLASH_BANKS_DETECT
@@ -175,8 +176,6 @@ flash_info_t flash_info[CFI_MAX_FLASH_BANKS];	/* FLASH chips info */
 #define CONFIG_SYS_FLASH_CFI_WIDTH	FLASH_CFI_8BIT
 #endif
 
-typedef unsigned long flash_sect_t;
-
 /* CFI standard query structure */
 struct cfi_qry {
 	u8	qry[3];
@@ -209,38 +208,38 @@ struct cfi_pri_hdr {
 	u8	minor_version;
 } __attribute__((packed));
 
-static void flash_write8(u8 value, void *addr)
+static void __flash_write8(u8 value, void *addr)
 {
 	__raw_writeb(value, addr);
 }
 
-static void flash_write16(u16 value, void *addr)
+static void __flash_write16(u16 value, void *addr)
 {
 	__raw_writew(value, addr);
 }
 
-static void flash_write32(u32 value, void *addr)
+static void __flash_write32(u32 value, void *addr)
 {
 	__raw_writel(value, addr);
 }
 
-static void flash_write64(u64 value, void *addr)
+static void __flash_write64(u64 value, void *addr)
 {
 	/* No architectures currently implement __raw_writeq() */
 	*(volatile u64 *)addr = value;
 }
 
-static u8 flash_read8(void *addr)
+static u8 __flash_read8(void *addr)
 {
 	return __raw_readb(addr);
 }
 
-static u16 flash_read16(void *addr)
+static u16 __flash_read16(void *addr)
 {
 	return __raw_readw(addr);
 }
 
-static u32 flash_read32(void *addr)
+static u32 __flash_read32(void *addr)
 {
 	return __raw_readl(addr);
 }
@@ -251,7 +250,25 @@ static u64 __flash_read64(void *addr)
 	return *(volatile u64 *)addr;
 }
 
+#ifdef CONFIG_CFI_FLASH_USE_WEAK_ACCESSORS
+void flash_write8(u8 value, void *addr)__attribute__((weak, alias("__flash_write8")));
+void flash_write16(u16 value, void *addr)__attribute__((weak, alias("__flash_write16")));
+void flash_write32(u32 value, void *addr)__attribute__((weak, alias("__flash_write32")));
+void flash_write64(u64 value, void *addr)__attribute__((weak, alias("__flash_write64")));
+u8 flash_read8(void *addr)__attribute__((weak, alias("__flash_read8")));
+u16 flash_read16(void *addr)__attribute__((weak, alias("__flash_read16")));
+u32 flash_read32(void *addr)__attribute__((weak, alias("__flash_read32")));
 u64 flash_read64(void *addr)__attribute__((weak, alias("__flash_read64")));
+#else
+#define flash_write8	__flash_write8
+#define flash_write16	__flash_write16
+#define flash_write32	__flash_write32
+#define flash_write64	__flash_write64
+#define flash_read8	__flash_read8
+#define flash_read16	__flash_read16
+#define flash_read32	__flash_read32
+#define flash_read64	__flash_read64
+#endif
 
 /*-----------------------------------------------------------------------
  */
@@ -1054,7 +1071,7 @@ int flash_erase (flash_info_t * info, int s_first, int s_last)
 	if (prot) {
 		printf ("- Warning: %d protected sectors will not be erased!\n",
 			prot);
-	} else {
+	} else if (flash_verbose) {
 		putc ('\n');
 	}
 
@@ -1101,11 +1118,14 @@ int flash_erase (flash_info_t * info, int s_first, int s_last)
 			if (flash_full_status_check
 			    (info, sect, info->erase_blk_tout, "erase")) {
 				rcode = 1;
-			} else
+			} else if (flash_verbose)
 				putc ('.');
 		}
 	}
+
+	if (flash_verbose)
 		puts (" done\n");
+
 	return rcode;
 }
 
@@ -1217,6 +1237,7 @@ void flash_print_info (flash_info_t * info)
  */
 #ifdef CONFIG_FLASH_SHOW_PROGRESS
 #define FLASH_SHOW_PROGRESS(scale, dots, digit, dots_sub) \
+	if (flash_verbose) { \
 		dots -= dots_sub; \
 		if ((scale > 0) && (dots <= 0)) { \
 			if ((digit % 5) == 0) \
@@ -1225,6 +1246,7 @@ void flash_print_info (flash_info_t * info)
 				putc ('.'); \
 			digit--; \
 			dots += scale; \
+		} \
 	}
 #else
 #define FLASH_SHOW_PROGRESS(scale, dots, digit, dots_sub)
@@ -1942,6 +1964,11 @@ ulong flash_get_size (ulong base, int banknum)
 	return (info->size);
 }
 
+void flash_set_verbose(uint v)
+{
+	flash_verbose = v;
+}
+
 /*-----------------------------------------------------------------------
  */
 unsigned long flash_init (void)
@@ -2060,5 +2087,10 @@ unsigned long flash_init (void)
 			       flash_get_info(apl[i].start));
 	}
 #endif
+
+#ifdef CONFIG_FLASH_CFI_MTD
+	cfi_mtd_init();
+#endif
+
 	return (size);
 }

drivers/mtd/cfi_mtd.c

+/*
+ * (C) Copyright 2008 Semihalf
+ *
+ * Written by: Piotr Ziecik <kosmo@semihalf.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ */
+
+#include <common.h>
+#include <flash.h>
+
+#include <asm/errno.h>
+#include <linux/mtd/mtd.h>
+
+extern flash_info_t flash_info[];
+
+static struct mtd_info cfi_mtd_info[CONFIG_SYS_MAX_FLASH_BANKS];
+
+static int cfi_mtd_erase(struct mtd_info *mtd, struct erase_info *instr)
+{
+	flash_info_t *fi = mtd->priv;
+	size_t a_start = fi->start[0] + instr->addr;
+	size_t a_end = a_start + instr->len;
+	int s_first = -1;
+	int s_last = -1;
+	int error, sect;
+
+	for (sect = 0; sect < fi->sector_count - 1; sect++) {
+		if (a_start == fi->start[sect])
+			s_first = sect;
+
+		if (a_end == fi->start[sect + 1]) {
+			s_last = sect;
+			break;
+		}
+	}
+
+	if (s_first >= 0 && s_first <= s_last) {
+		instr->state = MTD_ERASING;
+
+		flash_set_verbose(0);
+		error = flash_erase(fi, s_first, s_last);
+		flash_set_verbose(1);
+
+		if (error) {
+			instr->state = MTD_ERASE_FAILED;
+			return -EIO;
+		}
+
+		instr->state = MTD_ERASE_DONE;
+		mtd_erase_callback(instr);
+		return 0;
+	}
+
+	return -EINVAL;
+}
+
+static int cfi_mtd_read(struct mtd_info *mtd, loff_t from, size_t len,
+	size_t *retlen, u_char *buf)
+{
+	flash_info_t *fi = mtd->priv;
+	u_char *f = (u_char*)(fi->start[0]) + from;
+
+	memcpy(buf, f, len);
+	*retlen = len;
+
+	return 0;
+}
+
+static int cfi_mtd_write(struct mtd_info *mtd, loff_t to, size_t len,
+	size_t *retlen, const u_char *buf)
+{
+	flash_info_t *fi = mtd->priv;
+	u_long t = fi->start[0] + to;
+	int error;
+
+	flash_set_verbose(0);
+	error = write_buff(fi, (u_char*)buf, t, len);
+	flash_set_verbose(1);
+
+	if (!error) {
+		*retlen = len;
+		return 0;
+	}
+
+	return -EIO;
+}
+
+static void cfi_mtd_sync(struct mtd_info *mtd)
+{
+	/*
+	 * This function should wait until all pending operations
+	 * finish. However this driver is fully synchronous, so
+	 * this function returns immediately
+	 */
+}
+
+static int cfi_mtd_lock(struct mtd_info *mtd, loff_t ofs, size_t len)
+{
+	flash_info_t *fi = mtd->priv;
+
+	flash_set_verbose(0);
+	flash_protect(FLAG_PROTECT_SET, fi->start[0] + ofs,
+					fi->start[0] + ofs + len - 1, fi);
+	flash_set_verbose(1);
+
+	return 0;
+}
+
+static int cfi_mtd_unlock(struct mtd_info *mtd, loff_t ofs, size_t len)
+{
+	flash_info_t *fi = mtd->priv;
+
+	flash_set_verbose(0);
+	flash_protect(FLAG_PROTECT_CLEAR, fi->start[0] + ofs,
+					fi->start[0] + ofs + len - 1, fi);
+	flash_set_verbose(1);
+
+	return 0;
+}
+
+static int cfi_mtd_set_erasesize(struct mtd_info *mtd, flash_info_t *fi)
+{
+	int sect_size = 0;
+	int sect;
+
+	for (sect = 0; sect < fi->sector_count; sect++) {
+		if (!sect_size) {
+			sect_size = flash_sector_size(fi, sect);
+			continue;
+		}
+
+		if (sect_size != flash_sector_size(fi, sect)) {
+			sect_size = 0;
+			break;
+		}
+	}
+
+	if (!sect_size) {
+		puts("cfi-mtd: devices with multiple sector sizes are"
+							"not supported\n");
+		return -EINVAL;
+	}
+
+	mtd->erasesize = sect_size;
+
+	return 0;
+}
+
+int cfi_mtd_init(void)
+{
+	struct mtd_info *mtd;
+	flash_info_t *fi;
+	int error, i;
+
+	for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
+		fi = &flash_info[i];
+		mtd = &cfi_mtd_info[i];
+
+		memset(mtd, 0, sizeof(struct mtd_info));
+
+		error = cfi_mtd_set_erasesize(mtd, fi);
+		if (error)
+			continue;
+
+		mtd->name		= CFI_MTD_DEV_NAME;
+		mtd->type		= MTD_NORFLASH;
+		mtd->flags		= MTD_CAP_NORFLASH;
+		mtd->size		= fi->size;
+		mtd->writesize		= 1;
+
+		mtd->erase		= cfi_mtd_erase;
+		mtd->read		= cfi_mtd_read;
+		mtd->write		= cfi_mtd_write;
+		mtd->sync		= cfi_mtd_sync;
+		mtd->lock		= cfi_mtd_lock;
+		mtd->unlock		= cfi_mtd_unlock;
+		mtd->priv		= fi;
+
+		if (add_mtd_device(mtd))
+			return -ENOMEM;
+	}
+
+	return 0;
+}

include/flash.h

@@ -58,6 +58,8 @@ typedef struct {
 #endif
 } flash_info_t;
 
+typedef unsigned long flash_sect_t;
+
 /*
  * Values for the width of the port
  */
@@ -84,6 +86,9 @@ typedef struct {
 
 /* convert between bit value and numeric value */
 #define CFI_FLASH_SHIFT_WIDTH	3
+
+/* cfi-mtd device name */
+#define	CFI_MTD_DEV_NAME	"cfi-mtd"
 /* Prototypes */
 
 extern unsigned long flash_init (void);
@@ -92,6 +97,8 @@ extern int flash_erase	(flash_info_t *, int, int);
 extern int flash_sect_erase (ulong addr_first, ulong addr_last);
 extern int flash_sect_protect (int flag, ulong addr_first, ulong addr_last);
 extern int flash_sect_roundb (ulong *addr);
+extern unsigned long flash_sector_size(flash_info_t *info, flash_sect_t sect);
+extern void flash_set_verbose(uint);
 
 /* common/flash.c */
 extern void flash_protect (int flag, ulong from, ulong to, flash_info_t *info);
@@ -99,6 +106,11 @@ extern int flash_write (char *, ulong, ulong);
 extern flash_info_t *addr2info (ulong);
 extern int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt);
 
+/* drivers/mtd/cfi_mtd.c */
+#ifdef CONFIG_FLASH_CFI_MTD
+extern int cfi_mtd_init(void);
+#endif
+
 /* board/?/flash.c */
 #if defined(CONFIG_SYS_FLASH_PROTECTION)
 extern int flash_real_protect(flash_info_t *info, long sector, int prot);