summaryrefslogtreecommitdiff
path: root/arch/mips/pci/ops-au1000.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/mips/pci/ops-au1000.c')
-rw-r--r--arch/mips/pci/ops-au1000.c115
1 files changed, 53 insertions, 62 deletions
diff --git a/arch/mips/pci/ops-au1000.c b/arch/mips/pci/ops-au1000.c
index 1314bd58f036..9a57c5ab91dd 100644
--- a/arch/mips/pci/ops-au1000.c
+++ b/arch/mips/pci/ops-au1000.c
@@ -1,10 +1,9 @@
/*
* BRIEF MODULE DESCRIPTION
- * Alchemy/AMD Au1x00 PCI support.
+ * Alchemy/AMD Au1xx0 PCI support.
*
- * Copyright 2001-2003, 2007 MontaVista Software Inc.
- * Author: MontaVista Software, Inc.
- * ppopov@mvista.com or source@mvista.com
+ * Copyright 2001-2003, 2007-2008 MontaVista Software Inc.
+ * Author: MontaVista Software, Inc. <source@mvista.com>
*
* Support for all devices (greater than 16) added by David Gathright.
*
@@ -28,6 +27,7 @@
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
+
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/kernel.h>
@@ -36,9 +36,9 @@
#include <asm/mach-au1x00/au1000.h>
-#undef DEBUG
-#ifdef DEBUG
-#define DBG(x...) printk(x)
+#undef DEBUG
+#ifdef DEBUG
+#define DBG(x...) printk(KERN_DEBUG x)
#else
#define DBG(x...)
#endif
@@ -46,7 +46,6 @@
#define PCI_ACCESS_READ 0
#define PCI_ACCESS_WRITE 1
-
int (*board_pci_idsel)(unsigned int devsel, int assert);
void mod_wired_entry(int entry, unsigned long entrylo0,
@@ -92,10 +91,9 @@ void __init au1x_pci_cfg_init(void)
}
static int config_access(unsigned char access_type, struct pci_bus *bus,
- unsigned int dev_fn, unsigned char where,
- u32 * data)
+ unsigned int dev_fn, unsigned char where, u32 *data)
{
-#if defined( CONFIG_SOC_AU1500 ) || defined( CONFIG_SOC_AU1550 )
+#if defined(CONFIG_SOC_AU1500) || defined(CONFIG_SOC_AU1550)
unsigned int device = PCI_SLOT(dev_fn);
unsigned int function = PCI_FUNC(dev_fn);
unsigned long offset, status;
@@ -114,38 +112,36 @@ static int config_access(unsigned char access_type, struct pci_bus *bus,
Au1500_PCI_STATCMD);
au_sync_udelay(1);
- /* Allow board vendors to implement their own off-chip idsel.
+ /*
+ * Allow board vendors to implement their own off-chip IDSEL.
* If it doesn't succeed, may as well bail out at this point.
*/
- if (board_pci_idsel) {
- if (board_pci_idsel(device, 1) == 0) {
- *data = 0xffffffff;
- local_irq_restore(flags);
- return -1;
- }
+ if (board_pci_idsel && board_pci_idsel(device, 1) == 0) {
+ *data = 0xffffffff;
+ local_irq_restore(flags);
+ return -1;
}
- /* setup the config window */
- if (bus->number == 0) {
- cfg_base = ((1<<device)<<11);
- } else {
- cfg_base = 0x80000000 | (bus->number<<16) | (device<<11);
- }
+ /* Setup the config window */
+ if (bus->number == 0)
+ cfg_base = (1 << device) << 11;
+ else
+ cfg_base = 0x80000000 | (bus->number << 16) | (device << 11);
- /* setup the lower bits of the 36 bit address */
- offset = (function << 8) | (where & ~0x3);
- /* pick up any address that falls below the page mask */
+ /* Setup the lower bits of the 36-bit address */
+ offset = (function << 8) | (where & ~0x3);
+ /* Pick up any address that falls below the page mask */
offset |= cfg_base & ~PAGE_MASK;
- /* page boundary */
+ /* Page boundary */
cfg_base = cfg_base & PAGE_MASK;
/*
* To improve performance, if the current device is the same as
* the last device accessed, we don't touch the TLB.
*/
- entryLo0 = (6 << 26) | (cfg_base >> 6) | (2 << 3) | 7;
- entryLo1 = (6 << 26) | (cfg_base >> 6) | (0x1000 >> 6) | (2 << 3) | 7;
+ entryLo0 = (6 << 26) | (cfg_base >> 6) | (2 << 3) | 7;
+ entryLo1 = (6 << 26) | (cfg_base >> 6) | (0x1000 >> 6) | (2 << 3) | 7;
if ((entryLo0 != last_entryLo0) || (entryLo1 != last_entryLo1)) {
mod_wired_entry(pci_cfg_wired_entry, entryLo0, entryLo1,
(unsigned long)pci_cfg_vm->addr, PM_4K);
@@ -153,38 +149,37 @@ static int config_access(unsigned char access_type, struct pci_bus *bus,
last_entryLo1 = entryLo1;
}
- if (access_type == PCI_ACCESS_WRITE) {
+ if (access_type == PCI_ACCESS_WRITE)
au_writel(*data, (int)(pci_cfg_vm->addr + offset));
- } else {
+ else
*data = au_readl((int)(pci_cfg_vm->addr + offset));
- }
+
au_sync_udelay(2);
- DBG("cfg_access %d bus->number %d dev %d at %x *data %x conf %x\n",
- access_type, bus->number, device, where, *data, offset);
+ DBG("cfg_access %d bus->number %u dev %u at %x *data %x conf %lx\n",
+ access_type, bus->number, device, where, *data, offset);
- /* check master abort */
+ /* Check master abort */
status = au_readl(Au1500_PCI_STATCMD);
- if (status & (1<<29)) {
+ if (status & (1 << 29)) {
*data = 0xffffffff;
error = -1;
DBG("Au1x Master Abort\n");
} else if ((status >> 28) & 0xf) {
- DBG("PCI ERR detected: device %d, status %x\n", device, ((status >> 28) & 0xf));
+ DBG("PCI ERR detected: device %u, status %lx\n",
+ device, (status >> 28) & 0xf);
- /* clear errors */
+ /* Clear errors */
au_writel(status & 0xf000ffff, Au1500_PCI_STATCMD);
*data = 0xffffffff;
error = -1;
}
- /* Take away the idsel.
- */
- if (board_pci_idsel) {
+ /* Take away the IDSEL. */
+ if (board_pci_idsel)
(void)board_pci_idsel(device, 0);
- }
local_irq_restore(flags);
return error;
@@ -192,7 +187,7 @@ static int config_access(unsigned char access_type, struct pci_bus *bus,
}
static int read_config_byte(struct pci_bus *bus, unsigned int devfn,
- int where, u8 * val)
+ int where, u8 *val)
{
u32 data;
int ret;
@@ -206,9 +201,8 @@ static int read_config_byte(struct pci_bus *bus, unsigned int devfn,
return ret;
}
-
static int read_config_word(struct pci_bus *bus, unsigned int devfn,
- int where, u16 * val)
+ int where, u16 *val)
{
u32 data;
int ret;
@@ -221,7 +215,7 @@ static int read_config_word(struct pci_bus *bus, unsigned int devfn,
}
static int read_config_dword(struct pci_bus *bus, unsigned int devfn,
- int where, u32 * val)
+ int where, u32 *val)
{
int ret;
@@ -229,9 +223,8 @@ static int read_config_dword(struct pci_bus *bus, unsigned int devfn,
return ret;
}
-static int
-write_config_byte(struct pci_bus *bus, unsigned int devfn, int where,
- u8 val)
+static int write_config_byte(struct pci_bus *bus, unsigned int devfn,
+ int where, u8 val)
{
u32 data = 0;
@@ -239,7 +232,7 @@ write_config_byte(struct pci_bus *bus, unsigned int devfn, int where,
return -1;
data = (data & ~(0xff << ((where & 3) << 3))) |
- (val << ((where & 3) << 3));
+ (val << ((where & 3) << 3));
if (config_access(PCI_ACCESS_WRITE, bus, devfn, where, &data))
return -1;
@@ -247,9 +240,8 @@ write_config_byte(struct pci_bus *bus, unsigned int devfn, int where,
return PCIBIOS_SUCCESSFUL;
}
-static int
-write_config_word(struct pci_bus *bus, unsigned int devfn, int where,
- u16 val)
+static int write_config_word(struct pci_bus *bus, unsigned int devfn,
+ int where, u16 val)
{
u32 data = 0;
@@ -257,18 +249,16 @@ write_config_word(struct pci_bus *bus, unsigned int devfn, int where,
return -1;
data = (data & ~(0xffff << ((where & 3) << 3))) |
- (val << ((where & 3) << 3));
+ (val << ((where & 3) << 3));
if (config_access(PCI_ACCESS_WRITE, bus, devfn, where, &data))
return -1;
-
return PCIBIOS_SUCCESSFUL;
}
-static int
-write_config_dword(struct pci_bus *bus, unsigned int devfn, int where,
- u32 val)
+static int write_config_dword(struct pci_bus *bus, unsigned int devfn,
+ int where, u32 val)
{
if (config_access(PCI_ACCESS_WRITE, bus, devfn, where, &val))
return -1;
@@ -277,18 +267,20 @@ write_config_dword(struct pci_bus *bus, unsigned int devfn, int where,
}
static int config_read(struct pci_bus *bus, unsigned int devfn,
- int where, int size, u32 * val)
+ int where, int size, u32 *val)
{
switch (size) {
case 1: {
u8 _val;
int rc = read_config_byte(bus, devfn, where, &_val);
+
*val = _val;
return rc;
}
- case 2: {
+ case 2: {
u16 _val;
int rc = read_config_word(bus, devfn, where, &_val);
+
*val = _val;
return rc;
}
@@ -310,7 +302,6 @@ static int config_write(struct pci_bus *bus, unsigned int devfn,
}
}
-
struct pci_ops au1x_pci_ops = {
config_read,
config_write
generated by cgit v1.2.3 (git 2.0.4) at 2024-04-20 09:49:47 +0000