1 files changed, 106 insertions, 131 deletions

diff --git a/drivers/mtd/chips/cfi_probe.c b/drivers/mtd/chips/cfi_probe.c
index cf750038ce6..e8d0164498b 100644
--- a/drivers/mtd/chips/cfi_probe.c
+++ b/drivers/mtd/chips/cfi_probe.c
@@ -1,10 +1,8 @@
-/* 
+/*
    Common Flash Interface probe code.
    (C) 2000 Red Hat. GPL'd.
-   $Id: cfi_probe.c,v 1.83 2004/11/16 18:19:02 nico Exp $
 */
 
-#include <linux/config.h>
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/kernel.h>
@@ -20,7 +18,7 @@
 #include <linux/mtd/cfi.h>
 #include <linux/mtd/gen_probe.h>
 
-//#define DEBUG_CFI 
+//#define DEBUG_CFI
 
 #ifdef DEBUG_CFI
 static void print_cfi_ident(struct cfi_ident *);
@@ -40,23 +38,20 @@ struct mtd_info *cfi_probe(struct map_info *map);
 #define xip_allowed(base, map) \
 do { \
 	(void) map_read(map, base); \
-	asm volatile (".rep 8; nop; .endr"); \
+	xip_iprefetch(); \
 	local_irq_enable(); \
 } while (0)
 
 #define xip_enable(base, map, cfi) \
 do { \
-	cfi_send_gen_cmd(0xF0, 0, base, map, cfi, cfi->device_type, NULL); \
-	cfi_send_gen_cmd(0xFF, 0, base, map, cfi, cfi->device_type, NULL); \
+	cfi_qry_mode_off(base, map, cfi);		\
 	xip_allowed(base, map); \
 } while (0)
 
 #define xip_disable_qry(base, map, cfi) \
 do { \
 	xip_disable(); \
-	cfi_send_gen_cmd(0xF0, 0, base, map, cfi, cfi->device_type, NULL); \
-	cfi_send_gen_cmd(0xFF, 0, base, map, cfi, cfi->device_type, NULL); \
-	cfi_send_gen_cmd(0x98, 0x55, base, map, cfi, cfi->device_type, NULL); \
+	cfi_qry_mode_on(base, map, cfi); \
 } while (0)
 
 #else
@@ -72,38 +67,12 @@ do { \
    in: interleave,type,mode
    ret: table index, <0 for error
  */
-static int __xipram qry_present(struct map_info *map, __u32 base,
-				struct cfi_private *cfi)
-{
-	int osf = cfi->interleave * cfi->device_type;	// scale factor
-	map_word val[3];
-	map_word qry[3];
-
-	qry[0] = cfi_build_cmd('Q', map, cfi);
-	qry[1] = cfi_build_cmd('R', map, cfi);
-	qry[2] = cfi_build_cmd('Y', map, cfi);
-
-	val[0] = map_read(map, base + osf*0x10);
-	val[1] = map_read(map, base + osf*0x11);
-	val[2] = map_read(map, base + osf*0x12);
-
-	if (!map_word_equal(map, qry[0], val[0]))
-		return 0;
-
-	if (!map_word_equal(map, qry[1], val[1]))
-		return 0;
-
-	if (!map_word_equal(map, qry[2], val[2]))
-		return 0;
-
-	return 1; 	// "QRY" found
-}
 
 static int __xipram cfi_probe_chip(struct map_info *map, __u32 base,
 				   unsigned long *chip_map, struct cfi_private *cfi)
 {
 	int i;
-	
+
 	if ((base + 0) >= map->size) {
 		printk(KERN_NOTICE
 			"Probe at base[0x00](0x%08lx) past the end of the map(0x%08lx)\n",
@@ -118,17 +87,13 @@ static int __xipram cfi_probe_chip(struct map_info *map, __u32 base,
 	}
 
 	xip_disable();
-	cfi_send_gen_cmd(0xF0, 0, base, map, cfi, cfi->device_type, NULL);
-	cfi_send_gen_cmd(0xFF, 0, base, map, cfi, cfi->device_type, NULL);
-	cfi_send_gen_cmd(0x98, 0x55, base, map, cfi, cfi->device_type, NULL);
-
-	if (!qry_present(map,base,cfi)) {
+	if (!cfi_qry_mode_on(base, map, cfi)) {
 		xip_enable(base, map, cfi);
 		return 0;
 	}
 
 	if (!cfi->numchips) {
-		/* This is the first time we're called. Set up the CFI 
+		/* This is the first time we're called. Set up the CFI
 		   stuff accordingly and return */
 		return cfi_chip_setup(map, cfi);
 	}
@@ -138,32 +103,30 @@ static int __xipram cfi_probe_chip(struct map_info *map, __u32 base,
  		unsigned long start;
  		if(!test_bit(i, chip_map)) {
 			/* Skip location; no valid chip at this address */
- 			continue; 
+ 			continue;
  		}
  		start = i << cfi->chipshift;
 		/* This chip should be in read mode if it's one
 		   we've already touched. */
-		if (qry_present(map, start, cfi)) {
-			/* Eep. This chip also had the QRY marker. 
+		if (cfi_qry_present(map, start, cfi)) {
+			/* Eep. This chip also had the QRY marker.
 			 * Is it an alias for the new one? */
-			cfi_send_gen_cmd(0xF0, 0, start, map, cfi, cfi->device_type, NULL);
-			cfi_send_gen_cmd(0xFF, 0, start, map, cfi, cfi->device_type, NULL);
+			cfi_qry_mode_off(start, map, cfi);
 
 			/* If the QRY marker goes away, it's an alias */
-			if (!qry_present(map, start, cfi)) {
+			if (!cfi_qry_present(map, start, cfi)) {
 				xip_allowed(base, map);
 				printk(KERN_DEBUG "%s: Found an alias at 0x%x for the chip at 0x%lx\n",
 				       map->name, base, start);
 				return 0;
 			}
-			/* Yes, it's actually got QRY for data. Most 
+			/* Yes, it's actually got QRY for data. Most
 			 * unfortunate. Stick the new chip in read mode
 			 * too and if it's the same, assume it's an alias. */
 			/* FIXME: Use other modes to do a proper check */
-			cfi_send_gen_cmd(0xF0, 0, base, map, cfi, cfi->device_type, NULL);
-			cfi_send_gen_cmd(0xFF, 0, start, map, cfi, cfi->device_type, NULL);
-			
-			if (qry_present(map, base, cfi)) {
+			cfi_qry_mode_off(base, map, cfi);
+
+			if (cfi_qry_present(map, base, cfi)) {
 				xip_allowed(base, map);
 				printk(KERN_DEBUG "%s: Found an alias at 0x%x for the chip at 0x%lx\n",
 				       map->name, base, start);
@@ -171,31 +134,31 @@ static int __xipram cfi_probe_chip(struct map_info *map, __u32 base,
 			}
 		}
 	}
-	
+
 	/* OK, if we got to here, then none of the previous chips appear to
 	   be aliases for the current one. */
 	set_bit((base >> cfi->chipshift), chip_map); /* Update chip map */
 	cfi->numchips++;
-	
+
 	/* Put it back into Read Mode */
-	cfi_send_gen_cmd(0xF0, 0, base, map, cfi, cfi->device_type, NULL);
-	cfi_send_gen_cmd(0xFF, 0, base, map, cfi, cfi->device_type, NULL);
+	cfi_qry_mode_off(base, map, cfi);
 	xip_allowed(base, map);
 
 	printk(KERN_INFO "%s: Found %d x%d devices at 0x%x in %d-bit bank\n",
 	       map->name, cfi->interleave, cfi->device_type*8, base,
 	       map->bankwidth*8);
-	
+
 	return 1;
 }
 
-static int __xipram cfi_chip_setup(struct map_info *map, 
+static int __xipram cfi_chip_setup(struct map_info *map,
 				   struct cfi_private *cfi)
 {
 	int ofs_factor = cfi->interleave*cfi->device_type;
 	__u32 base = 0;
 	int num_erase_regions = cfi_read_query(map, base + (0x10 + 28)*ofs_factor);
 	int i;
+	int addr_unlock1 = 0x555, addr_unlock2 = 0x2AA;
 
 	xip_enable(base, map, cfi);
 #ifdef DEBUG_CFI
@@ -205,40 +168,20 @@ static int __xipram cfi_chip_setup(struct map_info *map,
 		return 0;
 
 	cfi->cfiq = kmalloc(sizeof(struct cfi_ident) + num_erase_regions * 4, GFP_KERNEL);
-	if (!cfi->cfiq) {
-		printk(KERN_WARNING "%s: kmalloc failed for CFI ident structure\n", map->name);
+	if (!cfi->cfiq)
 		return 0;
-	}
-	
-	memset(cfi->cfiq,0,sizeof(struct cfi_ident));	
-	
+
+	memset(cfi->cfiq,0,sizeof(struct cfi_ident));
+
 	cfi->cfi_mode = CFI_MODE_CFI;
-	
+
+	cfi->sector_erase_cmd = CMD(0x30);
+
 	/* Read the CFI info structure */
 	xip_disable_qry(base, map, cfi);
 	for (i=0; i<(sizeof(struct cfi_ident) + num_erase_regions * 4); i++)
 		((unsigned char *)cfi->cfiq)[i] = cfi_read_query(map,base + (0x10 + i)*ofs_factor);
 
-	/* Note we put the device back into Read Mode BEFORE going into Auto
-	 * Select Mode, as some devices support nesting of modes, others
-	 * don't. This way should always work.
-	 * On cmdset 0001 the writes of 0xaa and 0x55 are not needed, and
-	 * so should be treated as nops or illegal (and so put the device
-	 * back into Read Mode, which is a nop in this case).
-	 */
-	cfi_send_gen_cmd(0xf0,     0, base, map, cfi, cfi->device_type, NULL);
-	cfi_send_gen_cmd(0xaa, 0x555, base, map, cfi, cfi->device_type, NULL);
-	cfi_send_gen_cmd(0x55, 0x2aa, base, map, cfi, cfi->device_type, NULL);
-	cfi_send_gen_cmd(0x90, 0x555, base, map, cfi, cfi->device_type, NULL);
-	cfi->mfr = cfi_read_query(map, base);
-	cfi->id = cfi_read_query(map, base + ofs_factor);    
-
-	/* Put it back into Read Mode */
-	cfi_send_gen_cmd(0xF0, 0, base, map, cfi, cfi->device_type, NULL);
-	/* ... even if it's an Intel chip */
-	cfi_send_gen_cmd(0xFF, 0, base, map, cfi, cfi->device_type, NULL);
-	xip_allowed(base, map);
-
 	/* Do any necessary byteswapping */
 	cfi->cfiq->P_ID = le16_to_cpu(cfi->cfiq->P_ID);
 
@@ -255,64 +198,96 @@ static int __xipram cfi_chip_setup(struct map_info *map,
 
 	for (i=0; i<cfi->cfiq->NumEraseRegions; i++) {
 		cfi->cfiq->EraseRegionInfo[i] = le32_to_cpu(cfi->cfiq->EraseRegionInfo[i]);
-		
-#ifdef DEBUG_CFI		
+
+#ifdef DEBUG_CFI
 		printk("  Erase Region #%d: BlockSize 0x%4.4X bytes, %d blocks\n",
-		       i, (cfi->cfiq->EraseRegionInfo[i] >> 8) & ~0xff, 
+		       i, (cfi->cfiq->EraseRegionInfo[i] >> 8) & ~0xff,
 		       (cfi->cfiq->EraseRegionInfo[i] & 0xffff) + 1);
 #endif
 	}
 
-	printk(KERN_INFO "%s: Found %d x%d devices at 0x%x in %d-bit bank\n",
+	if (cfi->cfiq->P_ID == P_ID_SST_OLD) {
+		addr_unlock1 = 0x5555;
+		addr_unlock2 = 0x2AAA;
+	}
+
+	/*
+	 * Note we put the device back into Read Mode BEFORE going into Auto
+	 * Select Mode, as some devices support nesting of modes, others
+	 * don't. This way should always work.
+	 * On cmdset 0001 the writes of 0xaa and 0x55 are not needed, and
+	 * so should be treated as nops or illegal (and so put the device
+	 * back into Read Mode, which is a nop in this case).
+	 */
+	cfi_send_gen_cmd(0xf0,     0, base, map, cfi, cfi->device_type, NULL);
+	cfi_send_gen_cmd(0xaa, addr_unlock1, base, map, cfi, cfi->device_type, NULL);
+	cfi_send_gen_cmd(0x55, addr_unlock2, base, map, cfi, cfi->device_type, NULL);
+	cfi_send_gen_cmd(0x90, addr_unlock1, base, map, cfi, cfi->device_type, NULL);
+	cfi->mfr = cfi_read_query16(map, base);
+	cfi->id = cfi_read_query16(map, base + ofs_factor);
+
+	/* Get AMD/Spansion extended JEDEC ID */
+	if (cfi->mfr == CFI_MFR_AMD && (cfi->id & 0xff) == 0x7e)
+		cfi->id = cfi_read_query(map, base + 0xe * ofs_factor) << 8 |
+			  cfi_read_query(map, base + 0xf * ofs_factor);
+
+	/* Put it back into Read Mode */
+	cfi_qry_mode_off(base, map, cfi);
+	xip_allowed(base, map);
+
+	printk(KERN_INFO "%s: Found %d x%d devices at 0x%x in %d-bit bank. Manufacturer ID %#08x Chip ID %#08x\n",
 	       map->name, cfi->interleave, cfi->device_type*8, base,
-	       map->bankwidth*8);
+	       map->bankwidth*8, cfi->mfr, cfi->id);
 
 	return 1;
 }
 
 #ifdef DEBUG_CFI
-static char *vendorname(__u16 vendor) 
+static char *vendorname(__u16 vendor)
 {
 	switch (vendor) {
 	case P_ID_NONE:
 		return "None";
-		
+
 	case P_ID_INTEL_EXT:
 		return "Intel/Sharp Extended";
-		
+
 	case P_ID_AMD_STD:
 		return "AMD/Fujitsu Standard";
-		
+
 	case P_ID_INTEL_STD:
 		return "Intel/Sharp Standard";
-		
+
 	case P_ID_AMD_EXT:
 		return "AMD/Fujitsu Extended";
 
 	case P_ID_WINBOND:
 		return "Winbond Standard";
-		
+
 	case P_ID_ST_ADV:
 		return "ST Advanced";
 
 	case P_ID_MITSUBISHI_STD:
 		return "Mitsubishi Standard";
-		
+
 	case P_ID_MITSUBISHI_EXT:
 		return "Mitsubishi Extended";
 
 	case P_ID_SST_PAGE:
 		return "SST Page Write";
 
+	case P_ID_SST_OLD:
+		return "SST 39VF160x/39VF320x";
+
 	case P_ID_INTEL_PERFORMANCE:
 		return "Intel Performance Code";
-		
+
 	case P_ID_INTEL_DATA:
 		return "Intel Data";
-		
+
 	case P_ID_RESERVED:
 		return "Not Allowed / Reserved for Future Use";
-		
+
 	default:
 		return "Unknown";
 	}
@@ -325,21 +300,21 @@ static void print_cfi_ident(struct cfi_ident *cfip)
 	if (cfip->qry[0] != 'Q' || cfip->qry[1] != 'R' || cfip->qry[2] != 'Y') {
 		printk("Invalid CFI ident structure.\n");
 		return;
-	}	
-#endif		
+	}
+#endif
 	printk("Primary Vendor Command Set: %4.4X (%s)\n", cfip->P_ID, vendorname(cfip->P_ID));
 	if (cfip->P_ADR)
 		printk("Primary Algorithm Table at %4.4X\n", cfip->P_ADR);
 	else
 		printk("No Primary Algorithm Table\n");
-	
+
 	printk("Alternative Vendor Command Set: %4.4X (%s)\n", cfip->A_ID, vendorname(cfip->A_ID));
 	if (cfip->A_ADR)
 		printk("Alternate Algorithm Table at %4.4X\n", cfip->A_ADR);
 	else
 		printk("No Alternate Algorithm Table\n");
-		
-		
+
+
 	printk("Vcc Minimum: %2d.%d V\n", cfip->VccMin >> 4, cfip->VccMin & 0xf);
 	printk("Vcc Maximum: %2d.%d V\n", cfip->VccMax >> 4, cfip->VccMax & 0xf);
 	if (cfip->VppMin) {
@@ -348,61 +323,61 @@ static void print_cfi_ident(struct cfi_ident *cfip)
 	}
 	else
 		printk("No Vpp line\n");
-	
-	printk("Typical byte/word write timeout: %d µs\n", 1<<cfip->WordWriteTimeoutTyp);
-	printk("Maximum byte/word write timeout: %d µs\n", (1<<cfip->WordWriteTimeoutMax) * (1<<cfip->WordWriteTimeoutTyp));
-	
+
+	printk("Typical byte/word write timeout: %d µs\n", 1<<cfip->WordWriteTimeoutTyp);
+	printk("Maximum byte/word write timeout: %d µs\n", (1<<cfip->WordWriteTimeoutMax) * (1<<cfip->WordWriteTimeoutTyp));
+
 	if (cfip->BufWriteTimeoutTyp || cfip->BufWriteTimeoutMax) {
-		printk("Typical full buffer write timeout: %d µs\n", 1<<cfip->BufWriteTimeoutTyp);
-		printk("Maximum full buffer write timeout: %d µs\n", (1<<cfip->BufWriteTimeoutMax) * (1<<cfip->BufWriteTimeoutTyp));
+		printk("Typical full buffer write timeout: %d µs\n", 1<<cfip->BufWriteTimeoutTyp);
+		printk("Maximum full buffer write timeout: %d µs\n", (1<<cfip->BufWriteTimeoutMax) * (1<<cfip->BufWriteTimeoutTyp));
 	}
 	else
 		printk("Full buffer write not supported\n");
-	
+
 	printk("Typical block erase timeout: %d ms\n", 1<<cfip->BlockEraseTimeoutTyp);
 	printk("Maximum block erase timeout: %d ms\n", (1<<cfip->BlockEraseTimeoutMax) * (1<<cfip->BlockEraseTimeoutTyp));
 	if (cfip->ChipEraseTimeoutTyp || cfip->ChipEraseTimeoutMax) {
-		printk("Typical chip erase timeout: %d ms\n", 1<<cfip->ChipEraseTimeoutTyp); 
+		printk("Typical chip erase timeout: %d ms\n", 1<<cfip->ChipEraseTimeoutTyp);
 		printk("Maximum chip erase timeout: %d ms\n", (1<<cfip->ChipEraseTimeoutMax) * (1<<cfip->ChipEraseTimeoutTyp));
 	}
 	else
 		printk("Chip erase not supported\n");
-	
+
 	printk("Device size: 0x%X bytes (%d MiB)\n", 1 << cfip->DevSize, 1<< (cfip->DevSize - 20));
 	printk("Flash Device Interface description: 0x%4.4X\n", cfip->InterfaceDesc);
 	switch(cfip->InterfaceDesc) {
-	case 0:
+	case CFI_INTERFACE_X8_ASYNC:
 		printk("  - x8-only asynchronous interface\n");
 		break;
-		
-	case 1:
+
+	case CFI_INTERFACE_X16_ASYNC:
 		printk("  - x16-only asynchronous interface\n");
 		break;
-		
-	case 2:
+
+	case CFI_INTERFACE_X8_BY_X16_ASYNC:
 		printk("  - supports x8 and x16 via BYTE# with asynchronous interface\n");
 		break;
-		
-	case 3:
+
+	case CFI_INTERFACE_X32_ASYNC:
 		printk("  - x32-only asynchronous interface\n");
 		break;
-		
-	case 4:
+
+	case CFI_INTERFACE_X16_BY_X32_ASYNC:
 		printk("  - supports x16 and x32 via Word# with asynchronous interface\n");
 		break;
-		
-	case 65535:
+
+	case CFI_INTERFACE_NOT_ALLOWED:
 		printk("  - Not Allowed / Reserved\n");
 		break;
-		
+
 	default:
 		printk("  - Unknown\n");
 		break;
 	}
-	
+
 	printk("Max. bytes in buffer write: 0x%x\n", 1<< cfip->MaxBufWriteSize);
 	printk("Number of Erase Block Regions: %d\n", cfip->NumEraseRegions);
-	
+
 }
 #endif /* DEBUG_CFI */
 
@@ -426,7 +401,7 @@ static struct mtd_chip_driver cfi_chipdrv = {
 	.module		= THIS_MODULE
 };
 
-int __init cfi_probe_init(void)
+static int __init cfi_probe_init(void)
 {
 	register_mtd_chip_driver(&cfi_chipdrv);
 	return 0;