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path: root/drivers/mtd/chips/gen_probe.c
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Diffstat (limited to 'drivers/mtd/chips/gen_probe.c')
-rw-r--r--drivers/mtd/chips/gen_probe.c99
1 files changed, 54 insertions, 45 deletions
diff --git a/drivers/mtd/chips/gen_probe.c b/drivers/mtd/chips/gen_probe.c
index dc065b22f79..b57ceea2151 100644
--- a/drivers/mtd/chips/gen_probe.c
+++ b/drivers/mtd/chips/gen_probe.c
@@ -2,7 +2,6 @@
* Routines common to all CFI-type probes.
* (C) 2001-2003 Red Hat, Inc.
* GPL'd
- * $Id: gen_probe.c,v 1.22 2005/01/24 23:49:50 rmk Exp $
*/
#include <linux/kernel.h>
@@ -26,7 +25,7 @@ struct mtd_info *mtd_do_chip_probe(struct map_info *map, struct chip_probe *cp)
/* First probe the map to see if we have CFI stuff there. */
cfi = genprobe_ident_chips(map, cp);
-
+
if (!cfi)
return NULL;
@@ -36,12 +35,19 @@ struct mtd_info *mtd_do_chip_probe(struct map_info *map, struct chip_probe *cp)
mtd = check_cmd_set(map, 1); /* First the primary cmdset */
if (!mtd)
mtd = check_cmd_set(map, 0); /* Then the secondary */
-
- if (mtd)
+
+ if (mtd) {
+ if (mtd->size > map->size) {
+ printk(KERN_WARNING "Reducing visibility of %ldKiB chip to %ldKiB\n",
+ (unsigned long)mtd->size >> 10,
+ (unsigned long)map->size >> 10);
+ mtd->size = map->size;
+ }
return mtd;
+ }
printk(KERN_WARNING"gen_probe: No supported Vendor Command Set found\n");
-
+
kfree(cfi->cfiq);
kfree(cfi);
map->fldrv_priv = NULL;
@@ -60,14 +66,14 @@ static struct cfi_private *genprobe_ident_chips(struct map_info *map, struct chi
memset(&cfi, 0, sizeof(cfi));
- /* Call the probetype-specific code with all permutations of
+ /* Call the probetype-specific code with all permutations of
interleave and device type, etc. */
if (!genprobe_new_chip(map, cp, &cfi)) {
/* The probe didn't like it */
- printk(KERN_DEBUG "%s: Found no %s device at location zero\n",
- cp->name, map->name);
+ pr_debug("%s: Found no %s device at location zero\n",
+ cp->name, map->name);
return NULL;
- }
+ }
#if 0 /* Let the CFI probe routine do this sanity check. The Intel and AMD
probe routines won't ever return a broken CFI structure anyway,
@@ -92,22 +98,25 @@ static struct cfi_private *genprobe_ident_chips(struct map_info *map, struct chi
} else {
BUG();
}
-
+
cfi.numchips = 1;
- /*
- * Allocate memory for bitmap of valid chips.
- * Align bitmap storage size to full byte.
- */
+ /*
+ * Allocate memory for bitmap of valid chips.
+ * Align bitmap storage size to full byte.
+ */
max_chips = map->size >> cfi.chipshift;
- mapsize = (max_chips / 8) + ((max_chips % 8) ? 1 : 0);
- chip_map = kmalloc(mapsize, GFP_KERNEL);
+ if (!max_chips) {
+ printk(KERN_WARNING "NOR chip too large to fit in mapping. Attempting to cope...\n");
+ max_chips = 1;
+ }
+
+ mapsize = sizeof(long) * DIV_ROUND_UP(max_chips, BITS_PER_LONG);
+ chip_map = kzalloc(mapsize, GFP_KERNEL);
if (!chip_map) {
- printk(KERN_WARNING "%s: kmalloc failed for CFI chip map\n", map->name);
kfree(cfi.cfiq);
return NULL;
}
- memset (chip_map, 0, mapsize);
set_bit(0, chip_map); /* Mark first chip valid */
@@ -122,14 +131,13 @@ static struct cfi_private *genprobe_ident_chips(struct map_info *map, struct chi
}
/*
- * Now allocate the space for the structures we need to return to
+ * Now allocate the space for the structures we need to return to
* our caller, and copy the appropriate data into them.
*/
retcfi = kmalloc(sizeof(struct cfi_private) + cfi.numchips * sizeof(struct flchip), GFP_KERNEL);
if (!retcfi) {
- printk(KERN_WARNING "%s: kmalloc failed for CFI private structure\n", map->name);
kfree(cfi.cfiq);
kfree(chip_map);
return NULL;
@@ -145,8 +153,7 @@ static struct cfi_private *genprobe_ident_chips(struct map_info *map, struct chi
pchip->start = (i << cfi.chipshift);
pchip->state = FL_READY;
init_waitqueue_head(&pchip->wq);
- spin_lock_init(&pchip->_spinlock);
- pchip->mutex = &pchip->_spinlock;
+ mutex_init(&pchip->mutex);
}
}
@@ -154,7 +161,7 @@ static struct cfi_private *genprobe_ident_chips(struct map_info *map, struct chi
return retcfi;
}
-
+
static int genprobe_new_chip(struct map_info *map, struct chip_probe *cp,
struct cfi_private *cfi)
{
@@ -189,30 +196,33 @@ extern cfi_cmdset_fn_t cfi_cmdset_0001;
extern cfi_cmdset_fn_t cfi_cmdset_0002;
extern cfi_cmdset_fn_t cfi_cmdset_0020;
-static inline struct mtd_info *cfi_cmdset_unknown(struct map_info *map,
+static inline struct mtd_info *cfi_cmdset_unknown(struct map_info *map,
int primary)
{
struct cfi_private *cfi = map->fldrv_priv;
__u16 type = primary?cfi->cfiq->P_ID:cfi->cfiq->A_ID;
-#if defined(CONFIG_MODULES) && defined(HAVE_INTER_MODULE)
- char probename[32];
+#ifdef CONFIG_MODULES
+ char probename[sizeof(VMLINUX_SYMBOL_STR(cfi_cmdset_%4.4X))];
cfi_cmdset_fn_t *probe_function;
- sprintf(probename, "cfi_cmdset_%4.4X", type);
-
- probe_function = inter_module_get_request(probename, probename);
+ sprintf(probename, VMLINUX_SYMBOL_STR(cfi_cmdset_%4.4X), type);
+
+ probe_function = __symbol_get(probename);
+ if (!probe_function) {
+ request_module("cfi_cmdset_%4.4X", type);
+ probe_function = __symbol_get(probename);
+ }
if (probe_function) {
struct mtd_info *mtd;
mtd = (*probe_function)(map, primary);
/* If it was happy, it'll have increased its own use count */
- inter_module_put(probename);
+ symbol_put_addr(probe_function);
return mtd;
}
#endif
- printk(KERN_NOTICE "Support for command set %04X not present\n",
- type);
+ printk(KERN_NOTICE "Support for command set %04X not present\n", type);
return NULL;
}
@@ -221,33 +231,32 @@ static struct mtd_info *check_cmd_set(struct map_info *map, int primary)
{
struct cfi_private *cfi = map->fldrv_priv;
__u16 type = primary?cfi->cfiq->P_ID:cfi->cfiq->A_ID;
-
+
if (type == P_ID_NONE || type == P_ID_RESERVED)
return NULL;
switch(type){
- /* Urgh. Ifdefs. The version with weak symbols was
- * _much_ nicer. Shame it didn't seem to work on
- * anything but x86, really.
- * But we can't rely in inter_module_get() because
- * that'd mean we depend on link order.
- */
+ /* We need these for the !CONFIG_MODULES case,
+ because symbol_get() doesn't work there */
#ifdef CONFIG_MTD_CFI_INTELEXT
- case 0x0001:
- case 0x0003:
+ case P_ID_INTEL_EXT:
+ case P_ID_INTEL_STD:
+ case P_ID_INTEL_PERFORMANCE:
return cfi_cmdset_0001(map, primary);
#endif
#ifdef CONFIG_MTD_CFI_AMDSTD
- case 0x0002:
+ case P_ID_AMD_STD:
+ case P_ID_SST_OLD:
+ case P_ID_WINBOND:
return cfi_cmdset_0002(map, primary);
#endif
#ifdef CONFIG_MTD_CFI_STAA
- case 0x0020:
+ case P_ID_ST_ADV:
return cfi_cmdset_0020(map, primary);
#endif
+ default:
+ return cfi_cmdset_unknown(map, primary);
}
-
- return cfi_cmdset_unknown(map, primary);
}
MODULE_LICENSE("GPL");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-13 10:31:39 +0000