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| Current File : //sys/arm/xscale/i80321/i80321.c |
/* $NetBSD: i80321.c,v 1.15 2003/10/06 16:06:05 thorpej Exp $ */
/*-
* Copyright (c) 2002 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.
*/
/*
* Autoconfiguration support for the Intel i80321 I/O Processor.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/arm/xscale/i80321/i80321.c 193847 2009-06-09 18:18:41Z marcel $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
#define _ARM32_BUS_DMA_PRIVATE
#include <machine/bus.h>
#include <machine/intr.h>
#include <arm/xscale/i80321/i80321reg.h>
#include <arm/xscale/i80321/i80321var.h>
#include <arm/xscale/i80321/i80321_intr.h>
#include <dev/pci/pcireg.h>
volatile uint32_t intr_enabled;
uint32_t intr_steer = 0;
/*
* Statically-allocated bus_space stucture used to access the
* i80321's own registers.
*/
struct bus_space i80321_bs_tag;
/*
* There can be only one i80321, so we keep a global pointer to
* the softc, so board-specific code can use features of the
* i80321 without having to have a handle on the softc itself.
*/
struct i80321_softc *i80321_softc;
#define PCI_MAPREG_MEM_ADDR(x) ((x) & 0xfffffff0)
/*
* i80321_attach:
*
* Board-independent attach routine for the i80321.
*/
void
i80321_attach(struct i80321_softc *sc)
{
i80321_softc = sc;
uint32_t preg;
/* We expect the Memory Controller to be already sliced off. */
/*
* Program the Inbound windows.
*/
bus_space_write_4(sc->sc_st, sc->sc_atu_sh, ATU_IALR0,
(0xffffffff - (sc->sc_iwin[0].iwin_size - 1)) & 0xffffffc0);
bus_space_write_4(sc->sc_st, sc->sc_atu_sh, ATU_IATVR0,
sc->sc_iwin[0].iwin_xlate);
if (sc->sc_is_host) {
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
PCIR_BARS, sc->sc_iwin[0].iwin_base_lo);
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
PCIR_BARS + 0x04, sc->sc_iwin[0].iwin_base_hi);
} else {
sc->sc_iwin[0].iwin_base_lo = bus_space_read_4(sc->sc_st,
sc->sc_atu_sh, PCIR_BARS);
sc->sc_iwin[0].iwin_base_hi = bus_space_read_4(sc->sc_st,
sc->sc_atu_sh, PCIR_BARS + 0x04);
sc->sc_iwin[0].iwin_base_lo =
PCI_MAPREG_MEM_ADDR(sc->sc_iwin[0].iwin_base_lo);
}
bus_space_write_4(sc->sc_st, sc->sc_atu_sh, ATU_IALR1,
(0xffffffff - (sc->sc_iwin[1].iwin_size - 1)) & 0xffffffc0);
/* no xlate for window 1 */
if (sc->sc_is_host) {
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
PCIR_BARS + 0x08, sc->sc_iwin[1].iwin_base_lo);
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
PCIR_BARS + 0x0c, sc->sc_iwin[1].iwin_base_hi);
} else {
sc->sc_iwin[1].iwin_base_lo = bus_space_read_4(sc->sc_st,
sc->sc_atu_sh, PCIR_BARS + 0x08);
sc->sc_iwin[1].iwin_base_hi = bus_space_read_4(sc->sc_st,
sc->sc_atu_sh, PCIR_BARS + 0x0c);
sc->sc_iwin[1].iwin_base_lo =
PCI_MAPREG_MEM_ADDR(sc->sc_iwin[1].iwin_base_lo);
}
bus_space_write_4(sc->sc_st, sc->sc_atu_sh, ATU_IALR2,
(0xffffffff - (sc->sc_iwin[2].iwin_size - 1)) & 0xffffffc0);
bus_space_write_4(sc->sc_st, sc->sc_atu_sh, ATU_IATVR2,
sc->sc_iwin[2].iwin_xlate);
if (sc->sc_is_host) {
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
PCIR_BARS + 0x10, sc->sc_iwin[2].iwin_base_lo);
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
PCIR_BARS + 0x14, sc->sc_iwin[2].iwin_base_hi);
} else {
sc->sc_iwin[2].iwin_base_lo = bus_space_read_4(sc->sc_st,
sc->sc_atu_sh, PCIR_BARS + 0x10);
sc->sc_iwin[2].iwin_base_hi = bus_space_read_4(sc->sc_st,
sc->sc_atu_sh, PCIR_BARS + 0x14);
sc->sc_iwin[2].iwin_base_lo =
PCI_MAPREG_MEM_ADDR(sc->sc_iwin[2].iwin_base_lo);
}
bus_space_write_4(sc->sc_st, sc->sc_atu_sh, ATU_IALR3,
(0xffffffff - (sc->sc_iwin[3].iwin_size - 1)) & 0xffffffc0);
bus_space_write_4(sc->sc_st, sc->sc_atu_sh, ATU_IATVR3,
sc->sc_iwin[3].iwin_xlate);
if (sc->sc_is_host) {
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
ATU_IABAR3, sc->sc_iwin[3].iwin_base_lo);
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
ATU_IAUBAR3, sc->sc_iwin[3].iwin_base_hi);
} else {
sc->sc_iwin[3].iwin_base_lo = bus_space_read_4(sc->sc_st,
sc->sc_atu_sh, ATU_IABAR3);
sc->sc_iwin[3].iwin_base_hi = bus_space_read_4(sc->sc_st,
sc->sc_atu_sh, ATU_IAUBAR3);
sc->sc_iwin[3].iwin_base_lo =
PCI_MAPREG_MEM_ADDR(sc->sc_iwin[3].iwin_base_lo);
}
/*
* Mask (disable) the ATU interrupt sources.
* XXX May want to revisit this if we encounter
* XXX an application that wants it.
*/
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
ATU_ATUIMR,
ATUIMR_IMW1BU|ATUIMR_ISCEM|ATUIMR_RSCEM|ATUIMR_PST|
ATUIMR_DPE|ATUIMR_P_SERR_ASRT|ATUIMR_PMA|ATUIMR_PTAM|
ATUIMR_PTAT|ATUIMR_PMPE);
/*
* Program the outbound windows.
*/
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
ATU_OIOWTVR, sc->sc_ioout_xlate);
if (!sc->sc_is_host) {
sc->sc_owin[0].owin_xlate_lo = sc->sc_iwin[1].iwin_base_lo;
sc->sc_owin[0].owin_xlate_hi = sc->sc_iwin[1].iwin_base_hi;
}
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
ATU_OMWTVR0, sc->sc_owin[0].owin_xlate_lo);
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
ATU_OUMWTVR0, sc->sc_owin[0].owin_xlate_hi);
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
ATU_OMWTVR1, sc->sc_owin[1].owin_xlate_lo);
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
ATU_OUMWTVR1, sc->sc_owin[1].owin_xlate_hi);
/*
* Set up the ATU configuration register. All we do
* right now is enable Outbound Windows.
*/
bus_space_write_4(sc->sc_st, sc->sc_atu_sh, ATU_ATUCR,
ATUCR_OUT_EN);
/*
* Enable bus mastering, memory access, SERR, and parity
* checking on the ATU.
*/
if (sc->sc_is_host) {
preg = bus_space_read_4(sc->sc_st, sc->sc_atu_sh,
PCIR_COMMAND);
preg |= PCIM_CMD_MEMEN |
PCIM_CMD_BUSMASTEREN | PCIM_CMD_PERRESPEN |
PCIM_CMD_SERRESPEN;
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
PCIR_COMMAND, preg);
}
/* Initialize the bus space tags. */
i80321_io_bs_init(&sc->sc_pci_iot, sc);
i80321_mem_bs_init(&sc->sc_pci_memt, sc);
intr_enabled = 0;
i80321_set_intrmask();
i80321_set_intrsteer();
}
static __inline uint32_t
i80321_iintsrc_read(void)
{
uint32_t iintsrc;
__asm __volatile("mrc p6, 0, %0, c8, c0, 0"
: "=r" (iintsrc));
/*
* The IINTSRC register shows bits that are active even
* if they are masked in INTCTL, so we have to mask them
* off with the interrupts we consider enabled.
*/
return (iintsrc & intr_enabled);
}
int
arm_get_next_irq(int last __unused)
{
int irq;
if ((irq = i80321_iintsrc_read()))
return (ffs(irq) - 1);
return (-1);
}