* ahennessy@mvista.com
*
* Copyright (C) 2000-2001 Toshiba Corporation
+ * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
*
* Based on arch/mips/ddb5xxx/ddb5477/pci_ops.c
*
* Much of the code is derived from the original DDB5074 port by
* Geert Uytterhoeven <geert@sonycom.com>
*
+ * Copyright 2004 MontaVista Software Inc.
+ * Author: Manish Lachwani (mlachwani@mvista.com)
+ *
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
#include <linux/init.h>
#include <asm/addrspace.h>
-#include <asm/pci_channel.h>
+#include <asm/byteorder.h>
#include <asm/tx4927/tx4927_pci.h>
-#include <asm/debug.h>
/* initialize in setup */
struct resource pci_io_resource = {
- "pci IO space",
- (PCIBIOS_MIN_IO),
- ((PCIBIOS_MIN_IO) + (TX4927_PCIIO_SIZE)) - 1,
- IORESOURCE_IO
+ .name = "TX4927 PCI IO SPACE",
+ .start = 0x1000,
+ .end = (0x1000 + (TX4927_PCIIO_SIZE)) - 1,
+ .flags = IORESOURCE_IO
};
/* initialize in setup */
struct resource pci_mem_resource = {
- "pci memory space",
- TX4927_PCIMEM,
- TX4927_PCIMEM + TX4927_PCIMEM_SIZE - 1,
- IORESOURCE_MEM
-};
-
-extern struct pci_ops tx4927_pci_ops;
-
-/*
- * h/w only supports devices 0x00 to 0x14
- */
-struct pci_controller tx4927_controller = {
- .pci_ops = &tx4927_pci_ops,
- .io_resource = &pci_io_resource,
- .mem_resource = &pci_mem_resource,
+ .name = "TX4927 PCI MEM SPACE",
+ .start = TX4927_PCIMEM,
+ .end = TX4927_PCIMEM + TX4927_PCIMEM_SIZE - 1,
+ .flags = IORESOURCE_MEM
};
-static int mkaddr(unsigned char bus, unsigned char dev_fn,
- unsigned char where, int *flagsp)
+static int mkaddr(int bus, int dev_fn, int where, int *flagsp)
{
if (bus > 0) {
/* Type 1 configuration */
return code;
}
-/*
- * We can't address 8 and 16 bit words directly. Instead we have to
- * read/write a 32bit word and mask/modify the data we actually want.
- */
-static int tx4927_pcibios_read_config_byte(struct pci_dev *dev,
- int where, unsigned char *val)
+static int tx4927_pcibios_read_config(struct pci_bus *bus, unsigned int devfn, int where,
+ int size, u32 * val)
{
- int flags, retval;
- unsigned char bus, func_num;
+ int flags, retval, dev, busno, func;
- db_assert((where & 3) == 0);
- db_assert(where < (1 << 8));
+ busno = bus->number;
+ dev = PCI_SLOT(devfn);
+ func = PCI_FUNC(devfn);
/* check if the bus is top-level */
- if (dev->bus->parent != NULL) {
- bus = dev->bus->number;
- db_assert(bus != 0);
+ if (bus->parent != NULL) {
+ busno = bus->number;
} else {
- bus = 0;
+ busno = 0;
}
- func_num = PCI_FUNC(dev->devfn);
- if (mkaddr(bus, dev->devfn, where, &flags))
+ if (mkaddr(busno, devfn, where, &flags))
return -1;
-#ifdef __BIG_ENDIAN
- *val =
- *(volatile u8 *) ((ulong) & tx4927_pcicptr->
- g2pcfgdata | ((where & 3) ^ 3));
+
+ switch (size) {
+ case 1:
+ *val = *(volatile u8 *) ((ulong) & tx4927_pcicptr->
+ g2pcfgdata |
+#ifdef __LITTLE_ENDIAN
+ (where & 3));
#else
- *val =
- *(volatile u8 *) ((ulong) & tx4927_pcicptr->
- g2pcfgdata | (where & 3));
+ ((where & 0x3) ^ 0x3));
#endif
- retval = check_abort(flags);
- if (retval == PCIBIOS_DEVICE_NOT_FOUND)
- *val = 0xff;
- return retval;
-}
-
-static int tx4927_pcibios_read_config_word(struct pci_dev *dev,
- int where, unsigned short *val)
-{
- int flags, retval;
- unsigned char bus, func_num;
-
- if (where & 1)
- return PCIBIOS_BAD_REGISTER_NUMBER;
-
- db_assert((where & 3) == 0);
- db_assert(where < (1 << 8));
-
- /* check if the bus is top-level */
- if (dev->bus->parent != NULL) {
- bus = dev->bus->number;
- db_assert(bus != 0);
- } else {
- bus = 0;
- }
-
- func_num = PCI_FUNC(dev->devfn);
- if (mkaddr(bus, dev->devfn, where, &flags))
- return -1;
-#ifdef __BIG_ENDIAN
- *val =
- *(volatile u16 *) ((ulong) & tx4927_pcicptr->
- g2pcfgdata | ((where & 3) ^ 2));
+ break;
+ case 2:
+ *val = *(volatile u16 *) ((ulong) & tx4927_pcicptr->
+ g2pcfgdata |
+#ifdef __LITTLE_ENDIAN
+ (where & 3));
#else
- *val =
- *(volatile u16 *) ((ulong) & tx4927_pcicptr->
- g2pcfgdata | (where & 3));
+ ((where & 0x3) ^ 0x2));
#endif
- retval = check_abort(flags);
- if (retval == PCIBIOS_DEVICE_NOT_FOUND)
- *val = 0xffff;
- return retval;
-}
-
-static int tx4927_pcibios_read_config_dword(struct pci_dev *dev,
- int where, unsigned int *val)
-{
- int flags, retval;
- unsigned char bus, func_num;
-
- if (where & 3)
- return PCIBIOS_BAD_REGISTER_NUMBER;
-
- db_assert((where & 3) == 0);
- db_assert(where < (1 << 8));
-
- /* check if the bus is top-level */
- if (dev->bus->parent != NULL) {
- bus = dev->bus->number;
- db_assert(bus != 0);
- } else {
- bus = 0;
+ break;
+ case 4:
+ *val = tx4927_pcicptr->g2pcfgdata;
+ break;
}
- func_num = PCI_FUNC(dev->devfn);
- if (mkaddr(bus, dev->devfn, where, &flags))
- return -1;
- *val = tx4927_pcicptr->g2pcfgdata;
retval = check_abort(flags);
if (retval == PCIBIOS_DEVICE_NOT_FOUND)
*val = 0xffffffff;
return retval;
}
-static int tx4927_pcibios_write_config_byte(struct pci_dev *dev,
- int where, unsigned char val)
+static int tx4927_pcibios_write_config(struct pci_bus *bus, unsigned int devfn, int where,
+ int size, u32 val)
{
- int flags;
- unsigned char bus, func_num;
+ int flags, dev, busno, func;
+ busno = bus->number;
+ dev = PCI_SLOT(devfn);
+ func = PCI_FUNC(devfn);
/* check if the bus is top-level */
- if (dev->bus->parent != NULL) {
- bus = dev->bus->number;
- db_assert(bus != 0);
+ if (bus->parent != NULL) {
+ busno = bus->number;
} else {
- bus = 0;
+ busno = 0;
}
- func_num = PCI_FUNC(dev->devfn);
- if (mkaddr(bus, dev->devfn, where, &flags))
+ if (mkaddr(busno, devfn, where, &flags))
return -1;
-#ifdef __BIG_ENDIAN
- *(volatile u8 *) ((ulong) & tx4927_pcicptr->
- g2pcfgdata | ((where & 3) ^ 3)) = val;
+
+ switch (size) {
+ case 1:
+ *(volatile u8 *) ((ulong) & tx4927_pcicptr->
+ g2pcfgdata |
+#ifdef __LITTLE_ENDIAN
+ (where & 3)) = val;
#else
- *(volatile u8 *) ((ulong) & tx4927_pcicptr->
- g2pcfgdata | (where & 3)) = val;
+ ((where & 0x3) ^ 0x3)) = val;
#endif
- return check_abort(flags);
-}
+ break;
-static int tx4927_pcibios_write_config_word(struct pci_dev *dev,
- int where, unsigned short val)
-{
- int flags;
- unsigned char bus, func_num;
-
- if (where & 1)
- return PCIBIOS_BAD_REGISTER_NUMBER;
-
- /* check if the bus is top-level */
- if (dev->bus->parent != NULL) {
- bus = dev->bus->number;
- db_assert(bus != 0);
- } else {
- bus = 0;
- }
-
- func_num = PCI_FUNC(dev->devfn);
- if (mkaddr(bus, dev->devfn, where, &flags))
- return -1;
-#ifdef __BIG_ENDIAN
- *(volatile u16 *) ((ulong) & tx4927_pcicptr->
- g2pcfgdata | ((where & 3) ^ 2)) = val;
+ case 2:
+ *(volatile u16 *) ((ulong) & tx4927_pcicptr->
+ g2pcfgdata |
+#ifdef __LITTLE_ENDIAN
+ (where & 3)) = val;
#else
- *(volatile u16 *) ((ulong) & tx4927_pcicptr->
- g2pcfgdata | (where & 3)) = val;
+ ((where & 0x3) ^ 0x2)) = val;
#endif
- return check_abort(flags);
-}
-
-static int tx4927_pcibios_write_config_dword(struct pci_dev *dev,
- int where, unsigned int val)
-{
- int flags;
- unsigned char bus, func_num;
-
- if (where & 3)
- return PCIBIOS_BAD_REGISTER_NUMBER;
-
- /* check if the bus is top-level */
- if (dev->bus->parent != NULL) {
- bus = dev->bus->number;
- db_assert(bus != 0);
- } else {
- bus = 0;
+ break;
+ case 4:
+ tx4927_pcicptr->g2pcfgdata = val;
+ break;
}
- func_num = PCI_FUNC(dev->devfn);
- if (mkaddr(bus, dev->devfn, where, &flags))
- return -1;
- tx4927_pcicptr->g2pcfgdata = val;
return check_abort(flags);
}
struct pci_ops tx4927_pci_ops = {
- tx4927_pcibios_read_config_byte,
- tx4927_pcibios_read_config_word,
- tx4927_pcibios_read_config_dword,
- tx4927_pcibios_write_config_byte,
- tx4927_pcibios_write_config_word,
- tx4927_pcibios_write_config_dword
+ tx4927_pcibios_read_config,
+ tx4927_pcibios_write_config
+};
+
+/*
+ * h/w only supports devices 0x00 to 0x14
+ */
+struct pci_controller tx4927_controller = {
+ .pci_ops = &tx4927_pci_ops,
+ .io_resource = &pci_io_resource,
+ .mem_resource = &pci_mem_resource,
};
git://git.onelab.eu / linux-2.6.git / blobdiff