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sh: pci: Kill off the last remnants of the now unused pci-auto code.

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Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2009-04-20 21:46:42 +09:00
parent 2d5efc190e
commit 805fcc8899
5 changed files with 0 additions and 656 deletions
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18
arch/sh/drivers/pci/Kconfig
View file

@ -18,24 +18,6 @@ config SH_PCIDMA_NONCOHERENT
bridge integrated with your SH CPU, refer carefully to the chip specs
to see if you can say 'N' here. Otherwise, leave it as 'Y'.
# Temporary config option for transitioning off of PCI_AUTO
config PCI_NEW
def_bool y
depends on PCI
# This is also board-specific
config PCI_AUTO
bool
depends on PCI && !PCI_NEW
default y
config PCI_AUTO_UPDATE_RESOURCES
bool
depends on PCI_AUTO
default y if !SH_DREAMCAST
help
Selecting this option will cause the PCI auto code to leave your
BAR values alone. Otherwise they will be updated automatically. If
for some reason, you have a board that simply refuses to work
with its resources updated beyond what they are when the device
is powered up, set this to N. Everyone else will want this as Y.

1
arch/sh/drivers/pci/Makefile
View file

@ -2,7 +2,6 @@
# Makefile for the PCI specific kernel interface routines under Linux.
#
obj-y += pci-lib.o
obj-$(CONFIG_PCI_AUTO) += pci.o pci-auto.o
obj-$(CONFIG_PCI_NEW) += pci-new.o
obj-$(CONFIG_CPU_SUBTYPE_SH7751) += pci-sh7751.o ops-sh4.o

546
arch/sh/drivers/pci/pci-auto.c
View file

@ -1,546 +0,0 @@
/*
* PCI autoconfiguration library
*
* Author: Matt Porter <mporter@mvista.com>
*
* Copyright 2000, 2001 MontaVista Software Inc.
* Copyright 2001 Bradley D. LaRonde <brad@ltc.com>
* Copyright 2003 Paul Mundt <lethal@linux-sh.org>
*
* 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
* option) any later version.
*/
/*
* Modified for MIPS by Jun Sun, jsun@mvista.com
*
* . Simplify the interface between pci_auto and the rest: a single function.
* . Assign resources from low address to upper address.
* . change most int to u32.
*
* Further modified to include it as mips generic code, ppopov@mvista.com.
*
* 2001-10-26 Bradley D. LaRonde <brad@ltc.com>
* - Add a top_bus argument to the "early config" functions so that
* they can set a fake parent bus pointer to convince the underlying
* pci ops to use type 1 configuration for sub busses.
* - Set bridge base and limit registers correctly.
* - Align io and memory base properly before and after bridge setup.
* - Don't fall through to pci_setup_bars for bridge.
* - Reformat the debug output to look more like lspci's output.
*
* Cloned for SuperH by M. R. Brown, mrbrown@0xd6.org
*
* 2003-08-05 Paul Mundt <lethal@linux-sh.org>
* - Don't update the BAR values on systems that already have valid addresses
* and don't want these updated for whatever reason, by way of a new config
* option check. However, we still read in the old BAR values so that they
* can still be reported through the debug output.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/pci.h>
#define DEBUG
#ifdef DEBUG
#define DBG(x...) printk(x)
#else
#define DBG(x...)
#endif
/*
* These functions are used early on before PCI scanning is done
* and all of the pci_dev and pci_bus structures have been created.
*/
static struct pci_dev *fake_pci_dev(struct pci_channel *hose,
int top_bus, int busnr, int devfn)
{
static struct pci_dev dev;
static struct pci_bus bus;
dev.bus = &bus;
dev.sysdata = hose;
dev.devfn = devfn;
bus.number = busnr;
bus.ops = hose->pci_ops;
bus.sysdata = hose;
if(busnr != top_bus)
/* Fake a parent bus structure. */
bus.parent = &bus;
else
bus.parent = NULL;
return &dev;
}
#define EARLY_PCI_OP(rw, size, type) \
static int early_##rw##_config_##size(struct pci_channel *hose, \
int top_bus, int bus, int devfn, int offset, type value) \
{ \
return pci_##rw##_config_##size( \
fake_pci_dev(hose, top_bus, bus, devfn), \
offset, value); \
}
EARLY_PCI_OP(read, byte, u8 *)
EARLY_PCI_OP(read, word, u16 *)
EARLY_PCI_OP(read, dword, u32 *)
EARLY_PCI_OP(write, byte, u8)
EARLY_PCI_OP(write, word, u16)
EARLY_PCI_OP(write, dword, u32)
static struct resource *io_resource_inuse;
static struct resource *mem_resource_inuse;
static u32 pciauto_lower_iospc;
static u32 pciauto_upper_iospc;
static u32 pciauto_lower_memspc;
static u32 pciauto_upper_memspc;
static void __init
pciauto_setup_bars(struct pci_channel *hose,
int top_bus,
int current_bus,
int pci_devfn,
int bar_limit)
{
u32 bar_response, bar_size, bar_value;
u32 bar, addr_mask, bar_nr = 0;
u32 * upper_limit;
u32 * lower_limit;
int found_mem64 = 0;
for (bar = PCI_BASE_ADDRESS_0; bar <= bar_limit; bar+=4) {
u32 bar_addr;
/* Read the old BAR value */
early_read_config_dword(hose, top_bus,
current_bus,
pci_devfn,
bar,
&bar_addr);
/* Tickle the BAR and get the response */
early_write_config_dword(hose, top_bus,
current_bus,
pci_devfn,
bar,
0xffffffff);
early_read_config_dword(hose, top_bus,
current_bus,
pci_devfn,
bar,
&bar_response);
/*
* Write the old BAR value back out, only update the BAR
* if we implicitly want resources to be updated, which
* is done by the generic code further down. -- PFM.
*/
early_write_config_dword(hose, top_bus,
current_bus,
pci_devfn,
bar,
bar_addr);
/* If BAR is not implemented go to the next BAR */
if (!bar_response)
continue;
/*
* Workaround for a BAR that doesn't use its upper word,
* like the ALi 1535D+ PCI DC-97 Controller Modem (M5457).
* bdl <brad@ltc.com>
*/
if (!(bar_response & 0xffff0000))
bar_response |= 0xffff0000;
retry:
/* Check the BAR type and set our address mask */
if (bar_response & PCI_BASE_ADDRESS_SPACE) {
addr_mask = PCI_BASE_ADDRESS_IO_MASK;
upper_limit = &pciauto_upper_iospc;
lower_limit = &pciauto_lower_iospc;
DBG(" I/O");
} else {
if ((bar_response & PCI_BASE_ADDRESS_MEM_TYPE_MASK) ==
PCI_BASE_ADDRESS_MEM_TYPE_64)
found_mem64 = 1;
addr_mask = PCI_BASE_ADDRESS_MEM_MASK;
upper_limit = &pciauto_upper_memspc;
lower_limit = &pciauto_lower_memspc;
DBG(" Mem");
}
/* Calculate requested size */
bar_size = ~(bar_response & addr_mask) + 1;
/* Allocate a base address */
bar_value = ((*lower_limit - 1) & ~(bar_size - 1)) + bar_size;
if ((bar_value + bar_size) > *upper_limit) {
if (bar_response & PCI_BASE_ADDRESS_SPACE) {
if (io_resource_inuse->child) {
io_resource_inuse =
io_resource_inuse->child;
pciauto_lower_iospc =
io_resource_inuse->start;
pciauto_upper_iospc =
io_resource_inuse->end + 1;
goto retry;
}
} else {
if (mem_resource_inuse->child) {
mem_resource_inuse =
mem_resource_inuse->child;
pciauto_lower_memspc =
mem_resource_inuse->start;
pciauto_upper_memspc =
mem_resource_inuse->end + 1;
goto retry;
}
}
DBG(" unavailable -- skipping, value %x size %x\n",
bar_value, bar_size);
continue;
}
if (bar_value < *lower_limit || (bar_value + bar_size) >= *upper_limit) {
DBG(" unavailable -- skipping, value %x size %x\n",
bar_value, bar_size);
continue;
}
#ifdef CONFIG_PCI_AUTO_UPDATE_RESOURCES
/* Write it out and update our limit */
early_write_config_dword(hose, top_bus, current_bus, pci_devfn,
bar, bar_value);
#endif
*lower_limit = bar_value + bar_size;
/*
* If we are a 64-bit decoder then increment to the
* upper 32 bits of the bar and force it to locate
* in the lower 4GB of memory.
*/
if (found_mem64) {
bar += 4;
early_write_config_dword(hose, top_bus,
current_bus,
pci_devfn,
bar,
0x00000000);
}
DBG(" at 0x%.8x [size=0x%x]\n", bar_value, bar_size);
bar_nr++;
}
}
static void __init
pciauto_prescan_setup_bridge(struct pci_channel *hose,
int top_bus,
int current_bus,
int pci_devfn,
int sub_bus)
{
/* Configure bus number registers */
early_write_config_byte(hose, top_bus, current_bus, pci_devfn,
PCI_PRIMARY_BUS, current_bus);
early_write_config_byte(hose, top_bus, current_bus, pci_devfn,
PCI_SECONDARY_BUS, sub_bus + 1);
early_write_config_byte(hose, top_bus, current_bus, pci_devfn,
PCI_SUBORDINATE_BUS, 0xff);
/* Align memory and I/O to 1MB and 4KB boundaries. */
pciauto_lower_memspc = (pciauto_lower_memspc + (0x100000 - 1))
& ~(0x100000 - 1);
pciauto_lower_iospc = (pciauto_lower_iospc + (0x1000 - 1))
& ~(0x1000 - 1);
/* Set base (lower limit) of address range behind bridge. */
early_write_config_word(hose, top_bus, current_bus, pci_devfn,
PCI_MEMORY_BASE, pciauto_lower_memspc >> 16);
early_write_config_byte(hose, top_bus, current_bus, pci_devfn,
PCI_IO_BASE, (pciauto_lower_iospc & 0x0000f000) >> 8);
early_write_config_word(hose, top_bus, current_bus, pci_devfn,
PCI_IO_BASE_UPPER16, pciauto_lower_iospc >> 16);
/* We don't support prefetchable memory for now, so disable */
early_write_config_word(hose, top_bus, current_bus, pci_devfn,
PCI_PREF_MEMORY_BASE, 0);
early_write_config_word(hose, top_bus, current_bus, pci_devfn,
PCI_PREF_MEMORY_LIMIT, 0);
}
static void __init
pciauto_postscan_setup_bridge(struct pci_channel *hose,
int top_bus,
int current_bus,
int pci_devfn,
int sub_bus)
{
u32 temp;
/*
* [jsun] we always bump up baselines a little, so that if there
* nothing behind P2P bridge, we don't wind up overlapping IO/MEM
* spaces.
*/
pciauto_lower_memspc += 1;
pciauto_lower_iospc += 1;
/* Configure bus number registers */
early_write_config_byte(hose, top_bus, current_bus, pci_devfn,
PCI_SUBORDINATE_BUS, sub_bus);
/* Set upper limit of address range behind bridge. */
early_write_config_word(hose, top_bus, current_bus, pci_devfn,
PCI_MEMORY_LIMIT, pciauto_lower_memspc >> 16);
early_write_config_byte(hose, top_bus, current_bus, pci_devfn,
PCI_IO_LIMIT, (pciauto_lower_iospc & 0x0000f000) >> 8);
early_write_config_word(hose, top_bus, current_bus, pci_devfn,
PCI_IO_LIMIT_UPPER16, pciauto_lower_iospc >> 16);
/* Align memory and I/O to 1MB and 4KB boundaries. */
pciauto_lower_memspc = (pciauto_lower_memspc + (0x100000 - 1))
& ~(0x100000 - 1);
pciauto_lower_iospc = (pciauto_lower_iospc + (0x1000 - 1))
& ~(0x1000 - 1);
/* Enable memory and I/O accesses, enable bus master */
early_read_config_dword(hose, top_bus, current_bus, pci_devfn,
PCI_COMMAND, &temp);
early_write_config_dword(hose, top_bus, current_bus, pci_devfn,
PCI_COMMAND, temp | PCI_COMMAND_IO | PCI_COMMAND_MEMORY
| PCI_COMMAND_MASTER);
}
static void __init
pciauto_prescan_setup_cardbus_bridge(struct pci_channel *hose,
int top_bus,
int current_bus,
int pci_devfn,
int sub_bus)
{
/* Configure bus number registers */
early_write_config_byte(hose, top_bus, current_bus, pci_devfn,
PCI_PRIMARY_BUS, current_bus);
early_write_config_byte(hose, top_bus, current_bus, pci_devfn,
PCI_SECONDARY_BUS, sub_bus + 1);
early_write_config_byte(hose, top_bus, current_bus, pci_devfn,
PCI_SUBORDINATE_BUS, 0xff);
/* Align memory and I/O to 4KB and 4 byte boundaries. */
pciauto_lower_memspc = (pciauto_lower_memspc + (0x1000 - 1))
& ~(0x1000 - 1);
pciauto_lower_iospc = (pciauto_lower_iospc + (0x4 - 1))
& ~(0x4 - 1);
early_write_config_dword(hose, top_bus, current_bus, pci_devfn,
PCI_CB_MEMORY_BASE_0, pciauto_lower_memspc);
early_write_config_dword(hose, top_bus, current_bus, pci_devfn,
PCI_CB_IO_BASE_0, pciauto_lower_iospc);
}
static void __init
pciauto_postscan_setup_cardbus_bridge(struct pci_channel *hose,
int top_bus,
int current_bus,
int pci_devfn,
int sub_bus)
{
u32 temp;
/*
* [jsun] we always bump up baselines a little, so that if there
* nothing behind P2P bridge, we don't wind up overlapping IO/MEM
* spaces.
*/
pciauto_lower_memspc += 1;
pciauto_lower_iospc += 1;
/*
* Configure subordinate bus number. The PCI subsystem
* bus scan will renumber buses (reserving three additional
* for this PCI<->CardBus bridge for the case where a CardBus
* adapter contains a P2P or CB2CB bridge.
*/
early_write_config_byte(hose, top_bus, current_bus, pci_devfn,
PCI_SUBORDINATE_BUS, sub_bus);
/*
* Reserve an additional 4MB for mem space and 16KB for
* I/O space. This should cover any additional space
* requirement of unusual CardBus devices with
* additional bridges that can consume more address space.
*
* Although pcmcia-cs currently will reprogram bridge
* windows, the goal is to add an option to leave them
* alone and use the bridge window ranges as the regions
* that are searched for free resources upon hot-insertion
* of a device. This will allow a PCI<->CardBus bridge
* configured by this routine to happily live behind a
* P2P bridge in a system.
*/
/* Align memory and I/O to 4KB and 4 byte boundaries. */
pciauto_lower_memspc = (pciauto_lower_memspc + (0x1000 - 1))
& ~(0x1000 - 1);
pciauto_lower_iospc = (pciauto_lower_iospc + (0x4 - 1))
& ~(0x4 - 1);
/* Set up memory and I/O filter limits, assume 32-bit I/O space */
early_write_config_dword(hose, top_bus, current_bus, pci_devfn,
PCI_CB_MEMORY_LIMIT_0, pciauto_lower_memspc - 1);
early_write_config_dword(hose, top_bus, current_bus, pci_devfn,
PCI_CB_IO_LIMIT_0, pciauto_lower_iospc - 1);
/* Enable memory and I/O accesses, enable bus master */
early_read_config_dword(hose, top_bus, current_bus, pci_devfn,
PCI_COMMAND, &temp);
early_write_config_dword(hose, top_bus, current_bus, pci_devfn,
PCI_COMMAND, temp | PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
PCI_COMMAND_MASTER);
}
#define PCIAUTO_IDE_MODE_MASK 0x05
static int __init
pciauto_bus_scan(struct pci_channel *hose, int top_bus, int current_bus)
{
int sub_bus;
u32 pci_devfn, pci_class, cmdstat, found_multi=0;
unsigned short vid, did;
unsigned char header_type;
int devfn_start = 0;
int devfn_stop = 0xff;
sub_bus = current_bus;
if (hose->first_devfn)
devfn_start = hose->first_devfn;
if (hose->last_devfn)
devfn_stop = hose->last_devfn;
for (pci_devfn=devfn_start; pci_devfn<devfn_stop; pci_devfn++) {
if (PCI_FUNC(pci_devfn) && !found_multi)
continue;
early_read_config_word(hose, top_bus, current_bus, pci_devfn,
PCI_VENDOR_ID, &vid);
if (vid == 0xffff) continue;
early_read_config_byte(hose, top_bus, current_bus, pci_devfn,
PCI_HEADER_TYPE, &header_type);
if (!PCI_FUNC(pci_devfn))
found_multi = header_type & 0x80;
early_read_config_word(hose, top_bus, current_bus, pci_devfn,
PCI_DEVICE_ID, &did);
early_read_config_dword(hose, top_bus, current_bus, pci_devfn,
PCI_CLASS_REVISION, &pci_class);
DBG("%.2x:%.2x.%x Class %.4x: %.4x:%.4x",
current_bus, PCI_SLOT(pci_devfn), PCI_FUNC(pci_devfn),
pci_class >> 16, vid, did);
if (pci_class & 0xff)
DBG(" (rev %.2x)", pci_class & 0xff);
DBG("\n");
if ((pci_class >> 16) == PCI_CLASS_BRIDGE_PCI) {
DBG(" Bridge: primary=%.2x, secondary=%.2x\n",
current_bus, sub_bus + 1);
pciauto_prescan_setup_bridge(hose, top_bus, current_bus,
pci_devfn, sub_bus);
DBG("Scanning sub bus %.2x, I/O 0x%.8x, Mem 0x%.8x\n",
sub_bus + 1,
pciauto_lower_iospc, pciauto_lower_memspc);
sub_bus = pciauto_bus_scan(hose, top_bus, sub_bus+1);
DBG("Back to bus %.2x\n", current_bus);
pciauto_postscan_setup_bridge(hose, top_bus, current_bus,
pci_devfn, sub_bus);
continue;
} else if ((pci_class >> 16) == PCI_CLASS_BRIDGE_CARDBUS) {
DBG(" CARDBUS Bridge: primary=%.2x, secondary=%.2x\n",
current_bus, sub_bus + 1);
DBG("PCI Autoconfig: Found CardBus bridge, device %d function %d\n", PCI_SLOT(pci_devfn), PCI_FUNC(pci_devfn));
/* Place CardBus Socket/ExCA registers */
pciauto_setup_bars(hose, top_bus, current_bus, pci_devfn, PCI_BASE_ADDRESS_0);
pciauto_prescan_setup_cardbus_bridge(hose, top_bus,
current_bus, pci_devfn, sub_bus);
DBG("Scanning sub bus %.2x, I/O 0x%.8x, Mem 0x%.8x\n",
sub_bus + 1,
pciauto_lower_iospc, pciauto_lower_memspc);
sub_bus = pciauto_bus_scan(hose, top_bus, sub_bus+1);
DBG("Back to bus %.2x, sub_bus is %x\n", current_bus, sub_bus);
pciauto_postscan_setup_cardbus_bridge(hose, top_bus,
current_bus, pci_devfn, sub_bus);
continue;
} else if ((pci_class >> 16) == PCI_CLASS_STORAGE_IDE) {
unsigned char prg_iface;
early_read_config_byte(hose, top_bus, current_bus,
pci_devfn, PCI_CLASS_PROG, &prg_iface);
if (!(prg_iface & PCIAUTO_IDE_MODE_MASK)) {
DBG("Skipping legacy mode IDE controller\n");
continue;
}
}
/*
* Found a peripheral, enable some standard
* settings
*/
early_read_config_dword(hose, top_bus, current_bus, pci_devfn,
PCI_COMMAND, &cmdstat);
early_write_config_dword(hose, top_bus, current_bus, pci_devfn,
PCI_COMMAND, cmdstat | PCI_COMMAND_IO |
PCI_COMMAND_MEMORY |
PCI_COMMAND_MASTER);
early_write_config_byte(hose, top_bus, current_bus, pci_devfn,
PCI_LATENCY_TIMER, 0x80);
/* Allocate PCI I/O and/or memory space */
pciauto_setup_bars(hose, top_bus, current_bus, pci_devfn, PCI_BASE_ADDRESS_5);
}
return sub_bus;
}
int __init
pciauto_assign_resources(int busno, struct pci_channel *hose)
{
/* setup resource limits */
io_resource_inuse = hose->io_resource;
mem_resource_inuse = hose->mem_resource;
pciauto_lower_iospc = io_resource_inuse->start;
pciauto_upper_iospc = io_resource_inuse->end + 1;
pciauto_lower_memspc = mem_resource_inuse->start;
pciauto_upper_memspc = mem_resource_inuse->end + 1;
DBG("Autoconfig PCI channel 0x%p\n", hose);
DBG("Scanning bus %.2x, I/O 0x%.8x:0x%.8x, Mem 0x%.8x:0x%.8x\n",
busno, pciauto_lower_iospc, pciauto_upper_iospc,
pciauto_lower_memspc, pciauto_upper_memspc);
return pciauto_bus_scan(hose, busno, busno);
}

75
arch/sh/drivers/pci/pci.c
View file

@ -1,75 +0,0 @@
/*
* arch/sh/drivers/pci/pci.c
*
* Copyright (c) 2002 M. R. Brown <mrbrown@linux-sh.org>
* Copyright (c) 2004 - 2006 Paul Mundt <lethal@linux-sh.org>
*
* These functions are collected here to reduce duplication of common
* code amongst the many platform-specific PCI support code files.
*
* These routines require the following board-specific routines:
* void pcibios_fixup_irqs();
*
* See include/asm-sh/pci.h for more information.
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/dma-debug.h>
#include <asm/io.h>
static int __init pcibios_init(void)
{
struct pci_channel *p;
struct pci_bus *bus;
int busno;
/* init channels */
busno = 0;
for (p = board_pci_channels; p->init; p++) {
if (p->init(p) == 0)
p->enabled = 1;
else
pr_err("Unable to init pci channel %d\n", busno);
busno++;
}
#ifdef CONFIG_PCI_AUTO
/* assign resources */
busno = 0;
for (p = board_pci_channels; p->init; p++)
if (p->enabled)
busno = pciauto_assign_resources(busno, p) + 1;
#endif
/* scan the buses */
busno = 0;
for (p = board_pci_channels; p->init; p++) {
if (p->enabled) {
bus = pci_scan_bus(busno, p->pci_ops, p);
busno = bus->subordinate + 1;
}
}
pci_fixup_irqs(pci_common_swizzle, pcibios_map_platform_irq);
dma_debug_add_bus(&pci_bus_type);
return 0;
}
subsys_initcall(pcibios_init);
/*
* Called after each bus is probed, but before its children
* are examined.
*/
void __devinit __weak pcibios_fixup_bus(struct pci_bus *bus)
{
pci_read_bridge_bases(bus);
}
EXPORT_SYMBOL(board_pci_channels);

16
arch/sh/include/asm/pci.h
View file

@ -19,8 +19,6 @@
struct pci_channel {
struct pci_channel *next;
int (*init)(struct pci_channel *chan);
struct pci_ops *pci_ops;
struct resource *io_resource;
struct resource *mem_resource;
@ -28,20 +26,11 @@ struct pci_channel {
unsigned long io_offset;
unsigned long mem_offset;
int first_devfn;
int last_devfn;
int enabled;
unsigned long reg_base;
unsigned long io_map_base;
};
/*
* Each board initializes this array and terminates it with a NULL entry.
*/
extern struct pci_channel board_pci_channels[];
extern void register_pci_controller(struct pci_channel *hose);
extern unsigned long PCIBIOS_MIN_IO, PCIBIOS_MIN_MEM;
@ -122,13 +111,8 @@ static inline void pci_dma_burst_advice(struct pci_dev *pdev,
#endif
/* Board-specific fixup routines. */
int pcibios_init_platform(void);
int pcibios_map_platform_irq(struct pci_dev *dev, u8 slot, u8 pin);
#ifdef CONFIG_PCI_AUTO
int pciauto_assign_resources(int busno, struct pci_channel *hose);
#endif
extern void pcibios_resource_to_bus(struct pci_dev *dev,
struct pci_bus_region *region, struct resource *res);