[PATCH 07/15] pcmcia: CardBus doesn't need CIS access
Dominik Brodowski
linux at dominikbrodowski.net
Wed Jan 6 06:46:18 EST 2010
At least no in-kernel CardBus-capable PCI driver makes use of the CIS
access functions. Therefore, it seems sensible to remove this unused
code, and cleanup cardbus.c a lot.
CC: Jesse Barnes <jbarnes at virtuousgeek.org>
CC: Linus Torvalds <torvalds at linux-foundation.org>
Signed-off-by: Dominik Brodowski <linux at dominikbrodowski.net>
---
drivers/pcmcia/cardbus.c | 175 +++-------------------------------------
drivers/pcmcia/cistpl.c | 200 ++++++++--------------------------------------
include/pcmcia/ss.h | 6 --
3 files changed, 46 insertions(+), 335 deletions(-)
diff --git a/drivers/pcmcia/cardbus.c b/drivers/pcmcia/cardbus.c
index cdf50f3..d244d4b 100644
--- a/drivers/pcmcia/cardbus.c
+++ b/drivers/pcmcia/cardbus.c
@@ -20,170 +20,12 @@
*/
-#include <linux/module.h>
#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/slab.h>
-#include <linux/mm.h>
+#include <linux/module.h>
#include <linux/pci.h>
-#include <linux/ioport.h>
-#include <linux/io.h>
-#include <asm/irq.h>
-#include <pcmcia/cs_types.h>
#include <pcmcia/ss.h>
-#include <pcmcia/cs.h>
-#include <pcmcia/cistpl.h>
-#include "cs_internal.h"
-
-/*====================================================================*/
-
-/* Offsets in the Expansion ROM Image Header */
-#define ROM_SIGNATURE 0x0000 /* 2 bytes */
-#define ROM_DATA_PTR 0x0018 /* 2 bytes */
-
-/* Offsets in the CardBus PC Card Data Structure */
-#define PCDATA_SIGNATURE 0x0000 /* 4 bytes */
-#define PCDATA_VPD_PTR 0x0008 /* 2 bytes */
-#define PCDATA_LENGTH 0x000a /* 2 bytes */
-#define PCDATA_REVISION 0x000c
-#define PCDATA_IMAGE_SZ 0x0010 /* 2 bytes */
-#define PCDATA_ROM_LEVEL 0x0012 /* 2 bytes */
-#define PCDATA_CODE_TYPE 0x0014
-#define PCDATA_INDICATOR 0x0015
-
-/*=====================================================================
-
- Expansion ROM's have a special layout, and pointers specify an
- image number and an offset within that image. xlate_rom_addr()
- converts an image/offset address to an absolute offset from the
- ROM's base address.
-
-=====================================================================*/
-
-static u_int xlate_rom_addr(void __iomem *b, u_int addr)
-{
- u_int img = 0, ofs = 0, sz;
- u_short data;
- while ((readb(b) == 0x55) && (readb(b + 1) == 0xaa)) {
- if (img == (addr >> 28))
- return (addr & 0x0fffffff) + ofs;
- data = readb(b + ROM_DATA_PTR) + (readb(b + ROM_DATA_PTR + 1) << 8);
- sz = 512 * (readb(b + data + PCDATA_IMAGE_SZ) +
- (readb(b + data + PCDATA_IMAGE_SZ + 1) << 8));
- if ((sz == 0) || (readb(b + data + PCDATA_INDICATOR) & 0x80))
- break;
- b += sz;
- ofs += sz;
- img++;
- }
- return 0;
-}
-
-/*=====================================================================
-
- These are similar to setup_cis_mem and release_cis_mem for 16-bit
- cards. The "result" that is used externally is the cb_cis_virt
- pointer in the struct pcmcia_socket structure.
-
-=====================================================================*/
-
-static void cb_release_cis_mem(struct pcmcia_socket *s)
-{
- if (s->cb_cis_virt) {
- dev_dbg(&s->dev, "cb_release_cis_mem()\n");
- iounmap(s->cb_cis_virt);
- s->cb_cis_virt = NULL;
- s->cb_cis_res = NULL;
- }
-}
-
-static int cb_setup_cis_mem(struct pcmcia_socket *s, struct resource *res)
-{
- unsigned int start, size;
-
- if (res == s->cb_cis_res)
- return 0;
-
- if (s->cb_cis_res)
- cb_release_cis_mem(s);
-
- start = res->start;
- size = res->end - start + 1;
- s->cb_cis_virt = ioremap(start, size);
-
- if (!s->cb_cis_virt)
- return -1;
-
- s->cb_cis_res = res;
-
- return 0;
-}
-
-/*=====================================================================
-
- This is used by the CIS processing code to read CIS information
- from a CardBus device.
-
-=====================================================================*/
-
-int read_cb_mem(struct pcmcia_socket *s, int space, u_int addr, u_int len,
- void *ptr)
-{
- struct pci_dev *dev;
- struct resource *res;
-
- dev_dbg(&s->dev, "read_cb_mem(%d, %#x, %u)\n", space, addr, len);
- dev = pci_get_slot(s->cb_dev->subordinate, 0);
- if (!dev)
- goto fail;
-
- /* Config space? */
- if (space == 0) {
- if (addr + len > 0x100)
- goto failput;
- for (; len; addr++, ptr++, len--)
- pci_read_config_byte(dev, addr, ptr);
- return 0;
- }
-
- res = dev->resource + space - 1;
-
- pci_dev_put(dev);
-
- if (!res->flags)
- goto fail;
-
- if (cb_setup_cis_mem(s, res) != 0)
- goto fail;
-
- if (space == 7) {
- addr = xlate_rom_addr(s->cb_cis_virt, addr);
- if (addr == 0)
- goto fail;
- }
-
- if (addr + len > res->end - res->start)
- goto fail;
-
- memcpy_fromio(ptr, s->cb_cis_virt + addr, len);
- return 0;
-
-failput:
- pci_dev_put(dev);
-fail:
- memset(ptr, 0xff, len);
- return -1;
-}
-
-/*=====================================================================
-
- cb_alloc() and cb_free() allocate and free the kernel data
- structures for a Cardbus device, and handle the lowest level PCI
- device setup issues.
-
-=====================================================================*/
static void cardbus_config_irq_and_cls(struct pci_bus *bus, int irq)
{
@@ -215,6 +57,13 @@ static void cardbus_config_irq_and_cls(struct pci_bus *bus, int irq)
}
}
+/**
+ * cb_alloc() - add CardBus device
+ * @s: the pcmcia_socket where the CardBus device is located
+ *
+ * cb_alloc() allocates the kernel data structures for a Cardbus device
+ * and handles the lowest level PCI device setup issues.
+ */
int __ref cb_alloc(struct pcmcia_socket *s)
{
struct pci_bus *bus = s->cb_dev->subordinate;
@@ -249,12 +98,16 @@ int __ref cb_alloc(struct pcmcia_socket *s)
return 0;
}
+/**
+ * cb_free() - remove CardBus device
+ * @s: the pcmcia_socket where the CardBus device was located
+ *
+ * cb_free() handles the lowest level PCI device cleanup.
+ */
void cb_free(struct pcmcia_socket *s)
{
struct pci_dev *bridge = s->cb_dev;
- cb_release_cis_mem(s);
-
if (bridge)
pci_remove_behind_bridge(bridge);
}
diff --git a/drivers/pcmcia/cistpl.c b/drivers/pcmcia/cistpl.c
index a8323cb..368367c 100644
--- a/drivers/pcmcia/cistpl.c
+++ b/drivers/pcmcia/cistpl.c
@@ -268,29 +268,27 @@ EXPORT_SYMBOL(pcmcia_write_cis_mem);
static void read_cis_cache(struct pcmcia_socket *s, int attr, u_int addr,
size_t len, void *ptr)
{
- struct cis_cache_entry *cis;
- int ret;
+ struct cis_cache_entry *cis;
+ int ret;
- if (s->fake_cis) {
- if (s->fake_cis_len >= addr+len)
- memcpy(ptr, s->fake_cis+addr, len);
- else
- memset(ptr, 0xff, len);
- return;
- }
+ if (s->state & SOCKET_CARDBUS)
+ return;
- list_for_each_entry(cis, &s->cis_cache, node) {
- if (cis->addr == addr && cis->len == len && cis->attr == attr) {
- memcpy(ptr, cis->cache, len);
- return;
+ if (s->fake_cis) {
+ if (s->fake_cis_len >= addr+len)
+ memcpy(ptr, s->fake_cis+addr, len);
+ else
+ memset(ptr, 0xff, len);
+ return;
+ }
+
+ list_for_each_entry(cis, &s->cis_cache, node) {
+ if (cis->addr == addr && cis->len == len && cis->attr == attr) {
+ memcpy(ptr, cis->cache, len);
+ return;
+ }
}
- }
-#ifdef CONFIG_CARDBUS
- if (s->state & SOCKET_CARDBUS)
- ret = read_cb_mem(s, attr, addr, len, ptr);
- else
-#endif
ret = pcmcia_read_cis_mem(s, attr, addr, len, ptr);
if (ret == 0) {
@@ -351,6 +349,9 @@ int verify_cis_cache(struct pcmcia_socket *s)
struct cis_cache_entry *cis;
char *buf;
+ if (s->state & SOCKET_CARDBUS)
+ return -EINVAL;
+
buf = kmalloc(256, GFP_KERNEL);
if (buf == NULL) {
dev_printk(KERN_WARNING, &s->dev,
@@ -362,12 +363,8 @@ int verify_cis_cache(struct pcmcia_socket *s)
if (len > 256)
len = 256;
-#ifdef CONFIG_CARDBUS
- if (s->state & SOCKET_CARDBUS)
- read_cb_mem(s, cis->attr, cis->addr, len, buf);
- else
-#endif
- pcmcia_read_cis_mem(s, cis->attr, cis->addr, len, buf);
+
+ pcmcia_read_cis_mem(s, cis->attr, cis->addr, len, buf);
if (memcmp(buf, cis->cache, len) != 0) {
kfree(buf);
@@ -427,25 +424,16 @@ int pccard_get_first_tuple(struct pcmcia_socket *s, unsigned int function, tuple
{
if (!s)
return -EINVAL;
- if (!(s->state & SOCKET_PRESENT))
+
+ if (!(s->state & SOCKET_PRESENT) || (s->state & SOCKET_CARDBUS))
return -ENODEV;
tuple->TupleLink = tuple->Flags = 0;
-#ifdef CONFIG_CARDBUS
- if (s->state & SOCKET_CARDBUS) {
- struct pci_dev *dev = s->cb_dev;
- u_int ptr;
- pci_bus_read_config_dword(dev->subordinate, 0, PCI_CARDBUS_CIS, &ptr);
- tuple->CISOffset = ptr & ~7;
- SPACE(tuple->Flags) = (ptr & 7);
- } else
-#endif
- {
- /* Assume presence of a LONGLINK_C to address 0 */
- tuple->CISOffset = tuple->LinkOffset = 0;
- SPACE(tuple->Flags) = HAS_LINK(tuple->Flags) = 1;
- }
- if (!(s->state & SOCKET_CARDBUS) && (s->functions > 1) &&
- !(tuple->Attributes & TUPLE_RETURN_COMMON)) {
+
+ /* Assume presence of a LONGLINK_C to address 0 */
+ tuple->CISOffset = tuple->LinkOffset = 0;
+ SPACE(tuple->Flags) = HAS_LINK(tuple->Flags) = 1;
+
+ if ((s->functions > 1) && !(tuple->Attributes & TUPLE_RETURN_COMMON)) {
cisdata_t req = tuple->DesiredTuple;
tuple->DesiredTuple = CISTPL_LONGLINK_MFC;
if (pccard_get_next_tuple(s, function, tuple) == 0) {
@@ -481,7 +469,7 @@ static int follow_link(struct pcmcia_socket *s, tuple_t *tuple)
} else {
return -1;
}
- if (!(s->state & SOCKET_CARDBUS) && SPACE(tuple->Flags)) {
+ if (SPACE(tuple->Flags)) {
/* This is ugly, but a common CIS error is to code the long
link offset incorrectly, so we check the right spot... */
read_cis_cache(s, SPACE(tuple->Flags), ofs, 5, link);
@@ -507,7 +495,7 @@ int pccard_get_next_tuple(struct pcmcia_socket *s, unsigned int function, tuple_
if (!s)
return -EINVAL;
- if (!(s->state & SOCKET_PRESENT))
+ if (!(s->state & SOCKET_PRESENT) || (s->state & SOCKET_CARDBUS))
return -ENODEV;
link[1] = tuple->TupleLink;
@@ -1192,119 +1180,6 @@ static int parse_cftable_entry(tuple_t *tuple,
/*====================================================================*/
-#ifdef CONFIG_CARDBUS
-
-static int parse_bar(tuple_t *tuple, cistpl_bar_t *bar)
-{
- u_char *p;
- if (tuple->TupleDataLen < 6)
- return -EINVAL;
- p = (u_char *)tuple->TupleData;
- bar->attr = *p;
- p += 2;
- bar->size = get_unaligned_le32(p);
- return 0;
-}
-
-static int parse_config_cb(tuple_t *tuple, cistpl_config_t *config)
-{
- u_char *p;
-
- p = (u_char *)tuple->TupleData;
- if ((*p != 3) || (tuple->TupleDataLen < 6))
- return -EINVAL;
- config->last_idx = *(++p);
- p++;
- config->base = get_unaligned_le32(p);
- config->subtuples = tuple->TupleDataLen - 6;
- return 0;
-}
-
-static int parse_cftable_entry_cb(tuple_t *tuple,
- cistpl_cftable_entry_cb_t *entry)
-{
- u_char *p, *q, features;
-
- p = tuple->TupleData;
- q = p + tuple->TupleDataLen;
- entry->index = *p & 0x3f;
- entry->flags = 0;
- if (*p & 0x40)
- entry->flags |= CISTPL_CFTABLE_DEFAULT;
-
- /* Process optional features */
- if (++p == q)
- return -EINVAL;
- features = *p; p++;
-
- /* Power options */
- if ((features & 3) > 0) {
- p = parse_power(p, q, &entry->vcc);
- if (p == NULL)
- return -EINVAL;
- } else
- entry->vcc.present = 0;
- if ((features & 3) > 1) {
- p = parse_power(p, q, &entry->vpp1);
- if (p == NULL)
- return -EINVAL;
- } else
- entry->vpp1.present = 0;
- if ((features & 3) > 2) {
- p = parse_power(p, q, &entry->vpp2);
- if (p == NULL)
- return -EINVAL;
- } else
- entry->vpp2.present = 0;
-
- /* I/O window options */
- if (features & 0x08) {
- if (p == q)
- return -EINVAL;
- entry->io = *p; p++;
- } else
- entry->io = 0;
-
- /* Interrupt options */
- if (features & 0x10) {
- p = parse_irq(p, q, &entry->irq);
- if (p == NULL)
- return -EINVAL;
- } else
- entry->irq.IRQInfo1 = 0;
-
- if (features & 0x20) {
- if (p == q)
- return -EINVAL;
- entry->mem = *p; p++;
- } else
- entry->mem = 0;
-
- /* Misc features */
- if (features & 0x80) {
- if (p == q)
- return -EINVAL;
- entry->flags |= (*p << 8);
- if (*p & 0x80) {
- if (++p == q)
- return -EINVAL;
- entry->flags |= (*p << 16);
- }
- while (*p & 0x80)
- if (++p == q)
- return -EINVAL;
- p++;
- }
-
- entry->subtuples = q-p;
-
- return 0;
-}
-
-#endif
-
-/*====================================================================*/
-
static int parse_device_geo(tuple_t *tuple, cistpl_device_geo_t *geo)
{
u_char *p, *q;
@@ -1406,17 +1281,6 @@ int pcmcia_parse_tuple(tuple_t *tuple, cisparse_t *parse)
case CISTPL_DEVICE_A:
ret = parse_device(tuple, &parse->device);
break;
-#ifdef CONFIG_CARDBUS
- case CISTPL_BAR:
- ret = parse_bar(tuple, &parse->bar);
- break;
- case CISTPL_CONFIG_CB:
- ret = parse_config_cb(tuple, &parse->config);
- break;
- case CISTPL_CFTABLE_ENTRY_CB:
- ret = parse_cftable_entry_cb(tuple, &parse->cftable_entry_cb);
- break;
-#endif
case CISTPL_CHECKSUM:
ret = parse_checksum(tuple, &parse->checksum);
break;
diff --git a/include/pcmcia/ss.h b/include/pcmcia/ss.h
index b0ebd11..b4e5cfd 100644
--- a/include/pcmcia/ss.h
+++ b/include/pcmcia/ss.h
@@ -244,12 +244,6 @@ struct pcmcia_socket {
#endif /* CONFIG_PCMCIA_IOCTL */
#endif /* CONFIG_PCMCIA */
- /* cardbus (32-bit) */
-#ifdef CONFIG_CARDBUS
- struct resource *cb_cis_res;
- void __iomem *cb_cis_virt;
-#endif /* CONFIG_CARDBUS */
-
/* socket device */
struct device dev;
/* data internal to the socket driver */
--
1.6.3.3
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