apb.c revision 172394
186231Stmm/*- 286231Stmm * Copyright (c) 1994,1995 Stefan Esser, Wolfgang StanglMeier 386231Stmm * Copyright (c) 2000 Michael Smith <msmith@freebsd.org> 486231Stmm * Copyright (c) 2000 BSDi 5117119Stmm * Copyright (c) 2001, 2003 Thomas Moestl <tmm@FreeBSD.org> 686231Stmm * All rights reserved. 786231Stmm * 886231Stmm * Redistribution and use in source and binary forms, with or without 986231Stmm * modification, are permitted provided that the following conditions 1086231Stmm * are met: 1186231Stmm * 1. Redistributions of source code must retain the above copyright 1286231Stmm * notice, this list of conditions and the following disclaimer. 1386231Stmm * 2. Redistributions in binary form must reproduce the above copyright 1486231Stmm * notice, this list of conditions and the following disclaimer in the 1586231Stmm * documentation and/or other materials provided with the distribution. 1686231Stmm * 3. The name of the author may not be used to endorse or promote products 1786231Stmm * derived from this software without specific prior written permission. 1886231Stmm * 1986231Stmm * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 2086231Stmm * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2186231Stmm * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2286231Stmm * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 2386231Stmm * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2486231Stmm * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2586231Stmm * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2686231Stmm * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2786231Stmm * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2886231Stmm * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2986231Stmm * SUCH DAMAGE. 3086231Stmm * 3186231Stmm * from: FreeBSD: src/sys/dev/pci/pci_pci.c,v 1.3 2000/12/13 3286231Stmm */ 3386231Stmm 34153057Smarius#include <sys/cdefs.h> 35153057Smarius__FBSDID("$FreeBSD: head/sys/sparc64/pci/apb.c 172394 2007-09-30 11:05:18Z marius $"); 36153057Smarius 3786231Stmm/* 3886231Stmm * Support for the Sun APB (Advanced PCI Bridge) PCI-PCI bridge. 3986231Stmm * This bridge does not fully comply to the PCI bridge specification, and is 4086231Stmm * therefore not supported by the generic driver. 41129051Smarius * We can use some of the pcib methods anyway. 4286231Stmm */ 4386231Stmm 44117119Stmm#include "opt_ofw_pci.h" 45117119Stmm 4686231Stmm#include <sys/param.h> 4786231Stmm#include <sys/systm.h> 4886231Stmm#include <sys/kernel.h> 49130025Sphk#include <sys/module.h> 5086231Stmm#include <sys/bus.h> 5186231Stmm 52133589Smarius#include <dev/ofw/ofw_bus.h> 5393067Stmm#include <dev/ofw/openfirm.h> 5493067Stmm 55117119Stmm#include <machine/bus.h> 56117119Stmm#include <machine/ofw_bus.h> 5786231Stmm#include <machine/resource.h> 5886231Stmm 59119291Simp#include <dev/pci/pcireg.h> 60119291Simp#include <dev/pci/pcivar.h> 61119291Simp#include <dev/pci/pcib_private.h> 6286231Stmm 6386231Stmm#include "pcib_if.h" 6486231Stmm 65117119Stmm#include <sparc64/pci/ofw_pci.h> 66117119Stmm#include <sparc64/pci/ofw_pcib_subr.h> 67117119Stmm 6886231Stmm/* 6986231Stmm * Bridge-specific data. 7086231Stmm */ 7186231Stmmstruct apb_softc { 72117119Stmm struct ofw_pcib_gen_softc sc_bsc; 73153057Smarius uint8_t sc_iomap; 74153057Smarius uint8_t sc_memmap; 7586231Stmm}; 7686231Stmm 77117119Stmmstatic device_probe_t apb_probe; 78117119Stmmstatic device_attach_t apb_attach; 79117119Stmmstatic bus_alloc_resource_t apb_alloc_resource; 8086231Stmm 8186231Stmmstatic device_method_t apb_methods[] = { 8286231Stmm /* Device interface */ 8386231Stmm DEVMETHOD(device_probe, apb_probe), 8486231Stmm DEVMETHOD(device_attach, apb_attach), 8586231Stmm DEVMETHOD(device_shutdown, bus_generic_shutdown), 8686231Stmm DEVMETHOD(device_suspend, bus_generic_suspend), 8786231Stmm DEVMETHOD(device_resume, bus_generic_resume), 8886231Stmm 8986231Stmm /* Bus interface */ 9086231Stmm DEVMETHOD(bus_print_child, bus_generic_print_child), 91117119Stmm DEVMETHOD(bus_read_ivar, pcib_read_ivar), 92117119Stmm DEVMETHOD(bus_write_ivar, pcib_write_ivar), 9386231Stmm DEVMETHOD(bus_alloc_resource, apb_alloc_resource), 9486231Stmm DEVMETHOD(bus_release_resource, bus_generic_release_resource), 9586231Stmm DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 9686231Stmm DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 9786231Stmm DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 9886231Stmm DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 9986231Stmm 10086231Stmm /* pcib interface */ 101117119Stmm DEVMETHOD(pcib_maxslots, pcib_maxslots), 102117119Stmm DEVMETHOD(pcib_read_config, pcib_read_config), 103117119Stmm DEVMETHOD(pcib_write_config, pcib_write_config), 104117119Stmm DEVMETHOD(pcib_route_interrupt, ofw_pcib_gen_route_interrupt), 10586231Stmm 106133589Smarius /* ofw_bus interface */ 107133589Smarius DEVMETHOD(ofw_bus_get_node, ofw_pcib_gen_get_node), 108133589Smarius 109117119Stmm /* ofw_pci interface */ 110117119Stmm DEVMETHOD(ofw_pci_adjust_busrange, ofw_pcib_gen_adjust_busrange), 111117119Stmm 11286231Stmm { 0, 0 } 11386231Stmm}; 11486231Stmm 115154079Sjhbstatic devclass_t pcib_devclass; 11686231Stmm 117154079SjhbDEFINE_CLASS_0(pcib, apb_driver, apb_methods, sizeof(struct apb_softc)); 118117119StmmDRIVER_MODULE(apb, pci, apb_driver, pcib_devclass, 0, 0); 11986231Stmm 12086231Stmm/* APB specific registers */ 12186231Stmm#define APBR_IOMAP 0xde 12286231Stmm#define APBR_MEMMAP 0xdf 12386231Stmm 12486231Stmm/* Definitions for the mapping registers */ 12586231Stmm#define APB_IO_SCALE 0x200000 12686231Stmm#define APB_MEM_SCALE 0x20000000 12786231Stmm 12886231Stmm/* 12986231Stmm * Generic device interface 13086231Stmm */ 13186231Stmmstatic int 13286231Stmmapb_probe(device_t dev) 13386231Stmm{ 13486231Stmm 13586231Stmm if (pci_get_vendor(dev) == 0x108e && /* Sun */ 13686231Stmm pci_get_device(dev) == 0x5000) { /* APB */ 13786231Stmm device_set_desc(dev, "APB PCI-PCI bridge"); 13886231Stmm return (0); 13986231Stmm } 14086231Stmm return (ENXIO); 14186231Stmm} 14286231Stmm 14386231Stmmstatic void 144153057Smariusapb_map_print(uint8_t map, u_long scale) 14586231Stmm{ 14686231Stmm int i, first; 14786231Stmm 14886231Stmm for (first = 1, i = 0; i < 8; i++) { 14986231Stmm if ((map & (1 << i)) != 0) { 15086231Stmm printf("%s0x%lx-0x%lx", first ? "" : ", ", 15186231Stmm i * scale, (i + 1) * scale - 1); 15286231Stmm first = 0; 15386231Stmm } 15486231Stmm } 15586231Stmm} 15686231Stmm 15786231Stmmstatic int 158153057Smariusapb_checkrange(uint8_t map, u_long scale, u_long start, u_long end) 15986231Stmm{ 16086231Stmm int i, ei; 16186231Stmm 16286231Stmm i = start / scale; 16386231Stmm ei = end / scale; 16486231Stmm if (i > 7 || ei > 7) 16586231Stmm return (0); 16686231Stmm for (; i <= ei; i++) 16786231Stmm if ((map & (1 << i)) == 0) 16886231Stmm return (0); 16986231Stmm return (1); 17086231Stmm} 17186231Stmm 17286231Stmmstatic int 17386231Stmmapb_attach(device_t dev) 17486231Stmm{ 17588369Stmm struct apb_softc *sc; 17686231Stmm 17786231Stmm sc = device_get_softc(dev); 17886231Stmm 17986231Stmm /* 18086231Stmm * Get current bridge configuration. 18186231Stmm */ 182117119Stmm sc->sc_iomap = pci_read_config(dev, APBR_IOMAP, 1); 183117119Stmm sc->sc_memmap = pci_read_config(dev, APBR_MEMMAP, 1); 184117119Stmm ofw_pcib_gen_setup(dev); 18586231Stmm 18686231Stmm if (bootverbose) { 187172394Smarius device_printf(dev, " domain %d\n", 188172394Smarius sc->sc_bsc.ops_pcib_sc.domain); 189117119Stmm device_printf(dev, " secondary bus %d\n", 190117119Stmm sc->sc_bsc.ops_pcib_sc.secbus); 191117119Stmm device_printf(dev, " subordinate bus %d\n", 192117119Stmm sc->sc_bsc.ops_pcib_sc.subbus); 19386231Stmm device_printf(dev, " I/O decode "); 194117119Stmm apb_map_print(sc->sc_iomap, APB_IO_SCALE); 19586231Stmm printf("\n"); 19686231Stmm device_printf(dev, " memory decode "); 197117119Stmm apb_map_print(sc->sc_memmap, APB_MEM_SCALE); 19886231Stmm printf("\n"); 19986231Stmm } 20086231Stmm 201117119Stmm device_add_child(dev, "pci", sc->sc_bsc.ops_pcib_sc.secbus); 202117119Stmm return (bus_generic_attach(dev)); 20386231Stmm} 20486231Stmm 20586231Stmm/* 20686231Stmm * We have to trap resource allocation requests and ensure that the bridge 20786231Stmm * is set up to, or capable of handling them. 20886231Stmm */ 20986231Stmmstatic struct resource * 21086231Stmmapb_alloc_resource(device_t dev, device_t child, int type, int *rid, 21186231Stmm u_long start, u_long end, u_long count, u_int flags) 21286231Stmm{ 21388369Stmm struct apb_softc *sc; 21486231Stmm 21586231Stmm sc = device_get_softc(dev); 216145610Smarcel 21786231Stmm /* 21886231Stmm * If this is a "default" allocation against this rid, we can't work 219129051Smarius * out where it's coming from (we should actually never see these) so 220129051Smarius * we just have to punt. 22186231Stmm */ 222145610Smarcel if (start == 0 && end == ~0) { 22386231Stmm device_printf(dev, "can't decode default resource id %d for " 22486231Stmm "%s%d, bypassing\n", *rid, device_get_name(child), 22586231Stmm device_get_unit(child)); 226145610Smarcel goto passup; 227145610Smarcel } 22886231Stmm 229145610Smarcel /* 230145610Smarcel * Fail the allocation for this range if it's not supported. 231145610Smarcel * XXX we should probably just fix up the bridge decode and 232145610Smarcel * soldier on. 233145610Smarcel */ 234145610Smarcel switch (type) { 235145610Smarcel case SYS_RES_IOPORT: 236145610Smarcel if (!apb_checkrange(sc->sc_iomap, APB_IO_SCALE, start, end)) { 237145610Smarcel device_printf(dev, "device %s%d requested unsupported " 238145610Smarcel "I/O range 0x%lx-0x%lx\n", device_get_name(child), 239145610Smarcel device_get_unit(child), start, end); 240145610Smarcel return (NULL); 241145610Smarcel } 242145610Smarcel if (bootverbose) 243145610Smarcel device_printf(sc->sc_bsc.ops_pcib_sc.dev, "device " 244145610Smarcel "%s%d requested decoded I/O range 0x%lx-0x%lx\n", 245145610Smarcel device_get_name(child), device_get_unit(child), 246145610Smarcel start, end); 247145610Smarcel break; 24886231Stmm 249145610Smarcel case SYS_RES_MEMORY: 250145610Smarcel if (!apb_checkrange(sc->sc_memmap, APB_MEM_SCALE, start, end)) { 251145610Smarcel device_printf(dev, "device %s%d requested unsupported " 252145610Smarcel "memory range 0x%lx-0x%lx\n", 253145610Smarcel device_get_name(child), device_get_unit(child), 254145610Smarcel start, end); 255145610Smarcel return (NULL); 25686231Stmm } 257145610Smarcel if (bootverbose) 258145610Smarcel device_printf(sc->sc_bsc.ops_pcib_sc.dev, "device " 259145610Smarcel "%s%d requested decoded memory range 0x%lx-0x%lx\n", 260145610Smarcel device_get_name(child), device_get_unit(child), 261145610Smarcel start, end); 262145610Smarcel break; 263145610Smarcel 264145610Smarcel default: 265145610Smarcel break; 26686231Stmm } 26786231Stmm 268145610Smarcel passup: 26986231Stmm /* 27086231Stmm * Bridge is OK decoding this resource, so pass it up. 27186231Stmm */ 27286231Stmm return (bus_generic_alloc_resource(dev, child, type, rid, start, end, 27386231Stmm count, flags)); 27486231Stmm} 275