aboutsummaryrefslogtreecommitdiff
path: root/drivers/mtd/maps/amd76xrom.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/mtd/maps/amd76xrom.c')
-rw-r--r--drivers/mtd/maps/amd76xrom.c85
1 files changed, 51 insertions, 34 deletions
diff --git a/drivers/mtd/maps/amd76xrom.c b/drivers/mtd/maps/amd76xrom.c
index e8a900a7768..f7207b0a76d 100644
--- a/drivers/mtd/maps/amd76xrom.c
+++ b/drivers/mtd/maps/amd76xrom.c
@@ -2,19 +2,18 @@
* amd76xrom.c
*
* Normal mappings of chips in physical memory
- * $Id: amd76xrom.c,v 1.20 2005/03/18 14:04:35 gleixner Exp $
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
+#include <linux/slab.h>
#include <asm/io.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/cfi.h>
#include <linux/mtd/flashchip.h>
-#include <linux/config.h>
#include <linux/pci.h>
#include <linux/pci_ids.h>
#include <linux/list.h>
@@ -45,6 +44,23 @@ struct amd76xrom_map_info {
char map_name[sizeof(MOD_NAME) + 2 + ADDRESS_NAME_LEN];
};
+/* The 2 bits controlling the window size are often set to allow reading
+ * the BIOS, but too small to allow writing, since the lock registers are
+ * 4MiB lower in the address space than the data.
+ *
+ * This is intended to prevent flashing the bios, perhaps accidentally.
+ *
+ * This parameter allows the normal driver to over-ride the BIOS settings.
+ *
+ * The bits are 6 and 7. If both bits are set, it is a 5MiB window.
+ * If only the 7 Bit is set, it is a 4MiB window. Otherwise, a
+ * 64KiB window.
+ *
+ */
+static uint win_size_bits;
+module_param(win_size_bits, uint, 0);
+MODULE_PARM_DESC(win_size_bits, "ROM window size bits override for 0x43 byte, normally set by BIOS.");
+
static struct amd76xrom_window amd76xrom_window = {
.maps = LIST_HEAD_INIT(amd76xrom_window.maps),
};
@@ -58,6 +74,7 @@ static void amd76xrom_cleanup(struct amd76xrom_window *window)
/* Disable writes through the rom window */
pci_read_config_byte(window->pdev, 0x40, &byte);
pci_write_config_byte(window->pdev, 0x40, byte & ~1);
+ pci_dev_put(window->pdev);
}
/* Free all of the mtd devices */
@@ -65,12 +82,12 @@ static void amd76xrom_cleanup(struct amd76xrom_window *window)
if (map->rsrc.parent) {
release_resource(&map->rsrc);
}
- del_mtd_device(map->mtd);
+ mtd_device_unregister(map->mtd);
map_destroy(map->mtd);
list_del(&map->list);
kfree(map);
}
- if (window->rsrc.parent)
+ if (window->rsrc.parent)
release_resource(&window->rsrc);
if (window->virt) {
@@ -83,8 +100,8 @@ static void amd76xrom_cleanup(struct amd76xrom_window *window)
}
-static int __devinit amd76xrom_init_one (struct pci_dev *pdev,
- const struct pci_device_id *ent)
+static int amd76xrom_init_one(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
{
static char *rom_probe_types[] = { "cfi_probe", "jedec_probe", NULL };
u8 byte;
@@ -92,9 +109,19 @@ static int __devinit amd76xrom_init_one (struct pci_dev *pdev,
struct amd76xrom_map_info *map = NULL;
unsigned long map_top;
- /* Remember the pci dev I find the window in */
+ /* Remember the pci dev I find the window in - already have a ref */
window->pdev = pdev;
+ /* Enable the selected rom window. This is often incorrectly
+ * set up by the BIOS, and the 4MiB offset for the lock registers
+ * requires the full 5MiB of window space.
+ *
+ * This 'write, then read' approach leaves the bits for
+ * other uses of the hardware info.
+ */
+ pci_read_config_byte(pdev, 0x43, &byte);
+ pci_write_config_byte(pdev, 0x43, byte | win_size_bits );
+
/* Assume the rom window is properly setup, and find it's size */
pci_read_config_byte(pdev, 0x43, &byte);
if ((byte & ((1<<7)|(1<<6))) == ((1<<7)|(1<<6))) {
@@ -107,7 +134,7 @@ static int __devinit amd76xrom_init_one (struct pci_dev *pdev,
window->phys = 0xffff0000; /* 64KiB */
}
window->size = 0xffffffffUL - window->phys + 1UL;
-
+
/*
* Try to reserve the window mem region. If this fails then
* it is likely due to a fragment of the window being
@@ -122,23 +149,16 @@ static int __devinit amd76xrom_init_one (struct pci_dev *pdev,
if (request_resource(&iomem_resource, &window->rsrc)) {
window->rsrc.parent = NULL;
printk(KERN_ERR MOD_NAME
- " %s(): Unable to register resource"
- " 0x%.08lx-0x%.08lx - kernel bug?\n",
- __func__,
- window->rsrc.start, window->rsrc.end);
+ " %s(): Unable to register resource %pR - kernel bug?\n",
+ __func__, &window->rsrc);
+ return -EBUSY;
}
-#if 0
-
- /* Enable the selected rom window */
- pci_read_config_byte(pdev, 0x43, &byte);
- pci_write_config_byte(pdev, 0x43, byte | rwindow->segen_bits);
-#endif
/* Enable writes through the rom window */
pci_read_config_byte(pdev, 0x40, &byte);
pci_write_config_byte(pdev, 0x40, byte | 1);
-
+
/* FIXME handle registers 0x80 - 0x8C the bios region locks */
/* For write accesses caches are useless */
@@ -182,11 +202,11 @@ static int __devinit amd76xrom_init_one (struct pci_dev *pdev,
(((unsigned long)(window->virt)) + offset);
map->map.size = 0xffffffffUL - map_top + 1UL;
/* Set the name of the map to the address I am trying */
- sprintf(map->map_name, "%s @%08lx",
- MOD_NAME, map->map.phys);
+ sprintf(map->map_name, "%s @%08Lx",
+ MOD_NAME, (unsigned long long)map->map.phys);
/* There is no generic VPP support */
- for(map->map.bankwidth = 32; map->map.bankwidth;
+ for(map->map.bankwidth = 32; map->map.bankwidth;
map->map.bankwidth >>= 1)
{
char **probe_type;
@@ -211,8 +231,8 @@ static int __devinit amd76xrom_init_one (struct pci_dev *pdev,
/* Trim the size if we are larger than the map */
if (map->mtd->size > map->map.size) {
printk(KERN_WARNING MOD_NAME
- " rom(%u) larger than window(%lu). fixing...\n",
- map->mtd->size, map->map.size);
+ " rom(%llu) larger than window(%lu). fixing...\n",
+ (unsigned long long)map->mtd->size, map->map.size);
map->mtd->size = map->map.size;
}
if (window->rsrc.parent) {
@@ -239,10 +259,10 @@ static int __devinit amd76xrom_init_one (struct pci_dev *pdev,
for(i = 0; i < cfi->numchips; i++) {
cfi->chips[i].start += offset;
}
-
+
/* Now that the mtd devices is complete claim and export it */
map->mtd->owner = THIS_MODULE;
- if (add_mtd_device(map->mtd)) {
+ if (mtd_device_register(map->mtd, NULL, 0)) {
map_destroy(map->mtd);
map->mtd = NULL;
goto out;
@@ -259,9 +279,7 @@ static int __devinit amd76xrom_init_one (struct pci_dev *pdev,
out:
/* Free any left over map structures */
- if (map) {
- kfree(map);
- }
+ kfree(map);
/* See if I have any map structures */
if (list_empty(&window->maps)) {
amd76xrom_cleanup(window);
@@ -271,7 +289,7 @@ static int __devinit amd76xrom_init_one (struct pci_dev *pdev,
}
-static void __devexit amd76xrom_remove_one (struct pci_dev *pdev)
+static void amd76xrom_remove_one(struct pci_dev *pdev)
{
struct amd76xrom_window *window = &amd76xrom_window;
@@ -279,9 +297,9 @@ static void __devexit amd76xrom_remove_one (struct pci_dev *pdev)
}
static struct pci_device_id amd76xrom_pci_tbl[] = {
- { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_VIPER_7410,
+ { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_VIPER_7410,
PCI_ANY_ID, PCI_ANY_ID, },
- { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_VIPER_7440,
+ { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_VIPER_7440,
PCI_ANY_ID, PCI_ANY_ID, },
{ PCI_VENDOR_ID_AMD, 0x7468 }, /* amd8111 support */
{ 0, }
@@ -304,7 +322,7 @@ static int __init init_amd76xrom(void)
struct pci_device_id *id;
pdev = NULL;
for(id = amd76xrom_pci_tbl; id->vendor; id++) {
- pdev = pci_find_device(id->vendor, id->device, NULL);
+ pdev = pci_get_device(id->vendor, id->device, NULL);
if (pdev) {
break;
}
@@ -329,4 +347,3 @@ module_exit(cleanup_amd76xrom);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Eric Biederman <ebiederman@lnxi.com>");
MODULE_DESCRIPTION("MTD map driver for BIOS chips on the AMD76X southbridge");
-
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 20:26:47 +0000