NetBSD/sys/arch/ofppc/firepower/firepower_pci.c

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/* $NetBSD: firepower_pci.c,v 1.2 2001/10/30 01:21:24 thorpej Exp $ */
/*
* Copyright 2001 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* PCI Configuration Space support for the Powerhouse PowerPro
* and PowerTop system controllers, found in Firepower systems.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/lock.h>
#include <uvm/uvm_extern.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <ofppc/firepower/firepowerreg.h>
#include <ofppc/firepower/firepowervar.h>
#include <powerpc/pio.h>
void firepower_pci_attach_hook(struct device *, struct device *,
struct pcibus_attach_args *);
int firepower_pci_bus_maxdevs(void *, int);
pcitag_t firepower_pci_make_tag(void *, int, int, int);
void firepower_pci_decompose_tag(void *, pcitag_t, int *, int *,
int *);
pcireg_t firepower_pci_conf_read(void *, pcitag_t, int);
void firepower_pci_conf_write(void *, pcitag_t, int, pcireg_t);
/* Firepower systems can be multi-processor. */
struct simplelock firepower_pci_conf_slock = SIMPLELOCK_INITIALIZER;
#define PCI_CONF_LOCK(s) \
do { \
(s) = splhigh(); \
simple_lock(&firepower_pci_conf_slock); \
} while (/*CONSTCOND*/0)
#define PCI_CONF_UNLOCK(s) \
do { \
simple_unlock(&firepower_pci_conf_slock); \
splx((s)); \
} while (/*CONSTCOND*/0)
void
firepower_pci_init(pci_chipset_tag_t pc, void *v)
{
pc->pc_conf_v = v;
pc->pc_attach_hook = firepower_pci_attach_hook;
pc->pc_bus_maxdevs = firepower_pci_bus_maxdevs;
pc->pc_make_tag = firepower_pci_make_tag;
pc->pc_decompose_tag = firepower_pci_decompose_tag;
pc->pc_conf_read = firepower_pci_conf_read;
pc->pc_conf_write = firepower_pci_conf_write;
}
void
firepower_pci_attach_hook(struct device *parent, struct device *self,
struct pcibus_attach_args *pba)
{
}
int
firepower_pci_bus_maxdevs(void *v, int busno)
{
return (32);
}
pcitag_t
firepower_pci_make_tag(void *v, int b, int d, int f)
{
return (b << 16) | (d << 11) | (f << 8);
}
void
firepower_pci_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp, int *fp)
{
if (bp != NULL)
*bp = (tag >> 16) & 0xff;
if (dp != NULL)
*dp = (tag >> 11) & 0x1f;
if (fp != NULL)
*fp = (tag >> 8) & 0x7;
}
static int
firepower_pci_conf_addr(int b, int d, int f, int offset, bus_addr_t *addrp)
{
bus_addr_t addr;
if (b == 0) {
/*
* Type 0 cycles. Note the OpenFirmware on the Firepower
* numbers the device at ID SEL 11 "0", so we do to.
*/
if (d > 8) {
/* Can't represent this device. */
return (1);
}
addr = FP_MAP_PCICFG_BASE | (1U << (d + 11)) | (f << 8) |
offset;
} else {
/*
* Type 1 cycles. Note we only get 7 bits for the bus
* number in a Type 1 cycle.
*/
if (b > 127) {
/* Can't represent this device. */
return (1);
}
addr = FP_MAP_PCICFG_BASE | (b << 16) | (d << 11) | (f << 8) |
offset;
}
*addrp = addr;
return (0);
}
pcireg_t
firepower_pci_conf_read(void *v, pcitag_t tag, int offset)
{
bus_addr_t addr;
pcireg_t val;
int b, d, f, s;
firepower_pci_decompose_tag(v, tag, &b, &d, &f);
if (firepower_pci_conf_addr(b, d, f, offset, &addr))
return ((pcireg_t) -1);
PCI_CONF_LOCK(s);
if (b == 0)
CSR_WRITE4(FPR_PCI_CONFIG_TYPE, PCI_CONFIG_TYPE_0);
else
CSR_WRITE4(FPR_PCI_CONFIG_TYPE, PCI_CONFIG_TYPE_1);
val = in32rb(addr);
CSR_WRITE4(FPR_PCI_CONFIG_TYPE, PCI_CONFIG_TYPE_0);
PCI_CONF_UNLOCK(s);
return (val);
}
void
firepower_pci_conf_write(void *v, pcitag_t tag, int offset, pcireg_t data)
{
bus_addr_t addr;
int b, d, f, s;
firepower_pci_decompose_tag(v, tag, &b, &d, &f);
if (firepower_pci_conf_addr(b, d, f, offset, &addr))
return;
PCI_CONF_LOCK(s);
if (b == 0)
CSR_WRITE4(FPR_PCI_CONFIG_TYPE, PCI_CONFIG_TYPE_0);
else
CSR_WRITE4(FPR_PCI_CONFIG_TYPE, PCI_CONFIG_TYPE_1);
out32rb(addr, data);
CSR_WRITE4(FPR_PCI_CONFIG_TYPE, PCI_CONFIG_TYPE_0);
PCI_CONF_UNLOCK(s);
}