apb.c revision 206019
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 206019 2010-03-31 22:27:33Z 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> 5686231Stmm#include <machine/resource.h> 5786231Stmm 58119291Simp#include <dev/pci/pcireg.h> 59119291Simp#include <dev/pci/pcivar.h> 60119291Simp#include <dev/pci/pcib_private.h> 6186231Stmm 6286231Stmm#include "pcib_if.h" 6386231Stmm 64117119Stmm#include <sparc64/pci/ofw_pci.h> 65117119Stmm#include <sparc64/pci/ofw_pcib_subr.h> 66117119Stmm 6786231Stmm/* 6886231Stmm * Bridge-specific data. 6986231Stmm */ 7086231Stmmstruct apb_softc { 71117119Stmm struct ofw_pcib_gen_softc sc_bsc; 72153057Smarius uint8_t sc_iomap; 73153057Smarius uint8_t sc_memmap; 7486231Stmm}; 7586231Stmm 76117119Stmmstatic device_probe_t apb_probe; 77117119Stmmstatic device_attach_t apb_attach; 78117119Stmmstatic bus_alloc_resource_t apb_alloc_resource; 7986231Stmm 8086231Stmmstatic device_method_t apb_methods[] = { 8186231Stmm /* Device interface */ 8286231Stmm DEVMETHOD(device_probe, apb_probe), 8386231Stmm DEVMETHOD(device_attach, apb_attach), 8486231Stmm DEVMETHOD(device_shutdown, bus_generic_shutdown), 8586231Stmm DEVMETHOD(device_suspend, bus_generic_suspend), 8686231Stmm DEVMETHOD(device_resume, bus_generic_resume), 8786231Stmm 8886231Stmm /* Bus interface */ 8986231Stmm DEVMETHOD(bus_print_child, bus_generic_print_child), 90117119Stmm DEVMETHOD(bus_read_ivar, pcib_read_ivar), 91117119Stmm DEVMETHOD(bus_write_ivar, pcib_write_ivar), 9286231Stmm DEVMETHOD(bus_alloc_resource, apb_alloc_resource), 9386231Stmm DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 9486231Stmm DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 95190099Smarius DEVMETHOD(bus_release_resource, bus_generic_release_resource), 9686231Stmm DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 9786231Stmm DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 9886231Stmm 9986231Stmm /* pcib interface */ 100117119Stmm DEVMETHOD(pcib_maxslots, pcib_maxslots), 101117119Stmm DEVMETHOD(pcib_read_config, pcib_read_config), 102117119Stmm DEVMETHOD(pcib_write_config, pcib_write_config), 103117119Stmm DEVMETHOD(pcib_route_interrupt, ofw_pcib_gen_route_interrupt), 10486231Stmm 105133589Smarius /* ofw_bus interface */ 106133589Smarius DEVMETHOD(ofw_bus_get_node, ofw_pcib_gen_get_node), 107133589Smarius 108190099Smarius KOBJMETHOD_END 10986231Stmm}; 11086231Stmm 111154079Sjhbstatic devclass_t pcib_devclass; 11286231Stmm 113154079SjhbDEFINE_CLASS_0(pcib, apb_driver, apb_methods, sizeof(struct apb_softc)); 114200874SmariusEARLY_DRIVER_MODULE(apb, pci, apb_driver, pcib_devclass, 0, 0, BUS_PASS_BUS); 115200815SmariusMODULE_DEPEND(apb, pci, 1, 1, 1); 11686231Stmm 11786231Stmm/* APB specific registers */ 11886231Stmm#define APBR_IOMAP 0xde 11986231Stmm#define APBR_MEMMAP 0xdf 12086231Stmm 12186231Stmm/* Definitions for the mapping registers */ 12286231Stmm#define APB_IO_SCALE 0x200000 12386231Stmm#define APB_MEM_SCALE 0x20000000 12486231Stmm 12586231Stmm/* 12686231Stmm * Generic device interface 12786231Stmm */ 12886231Stmmstatic int 12986231Stmmapb_probe(device_t dev) 13086231Stmm{ 13186231Stmm 13286231Stmm if (pci_get_vendor(dev) == 0x108e && /* Sun */ 13386231Stmm pci_get_device(dev) == 0x5000) { /* APB */ 13486231Stmm device_set_desc(dev, "APB PCI-PCI bridge"); 13586231Stmm return (0); 13686231Stmm } 13786231Stmm return (ENXIO); 13886231Stmm} 13986231Stmm 14086231Stmmstatic void 141153057Smariusapb_map_print(uint8_t map, u_long scale) 14286231Stmm{ 14386231Stmm int i, first; 14486231Stmm 14586231Stmm for (first = 1, i = 0; i < 8; i++) { 14686231Stmm if ((map & (1 << i)) != 0) { 14786231Stmm printf("%s0x%lx-0x%lx", first ? "" : ", ", 14886231Stmm i * scale, (i + 1) * scale - 1); 14986231Stmm first = 0; 15086231Stmm } 15186231Stmm } 15286231Stmm} 15386231Stmm 15486231Stmmstatic int 155153057Smariusapb_checkrange(uint8_t map, u_long scale, u_long start, u_long end) 15686231Stmm{ 15786231Stmm int i, ei; 15886231Stmm 15986231Stmm i = start / scale; 16086231Stmm ei = end / scale; 16186231Stmm if (i > 7 || ei > 7) 16286231Stmm return (0); 16386231Stmm for (; i <= ei; i++) 16486231Stmm if ((map & (1 << i)) == 0) 16586231Stmm return (0); 16686231Stmm return (1); 16786231Stmm} 16886231Stmm 16986231Stmmstatic int 17086231Stmmapb_attach(device_t dev) 17186231Stmm{ 17288369Stmm struct apb_softc *sc; 17386231Stmm 17486231Stmm sc = device_get_softc(dev); 17586231Stmm 17686231Stmm /* 17786231Stmm * Get current bridge configuration. 17886231Stmm */ 179178279Smarius sc->sc_bsc.ops_pcib_sc.domain = pci_get_domain(dev); 180178279Smarius sc->sc_bsc.ops_pcib_sc.secbus = 181178279Smarius pci_read_config(dev, PCIR_SECBUS_1, 1); 182178279Smarius sc->sc_bsc.ops_pcib_sc.subbus = 183178279Smarius pci_read_config(dev, PCIR_SUBBUS_1, 1); 184117119Stmm sc->sc_iomap = pci_read_config(dev, APBR_IOMAP, 1); 185117119Stmm sc->sc_memmap = pci_read_config(dev, APBR_MEMMAP, 1); 186117119Stmm ofw_pcib_gen_setup(dev); 18786231Stmm 18886231Stmm if (bootverbose) { 189172394Smarius device_printf(dev, " domain %d\n", 190172394Smarius sc->sc_bsc.ops_pcib_sc.domain); 191117119Stmm device_printf(dev, " secondary bus %d\n", 192117119Stmm sc->sc_bsc.ops_pcib_sc.secbus); 193117119Stmm device_printf(dev, " subordinate bus %d\n", 194117119Stmm sc->sc_bsc.ops_pcib_sc.subbus); 19586231Stmm device_printf(dev, " I/O decode "); 196117119Stmm apb_map_print(sc->sc_iomap, APB_IO_SCALE); 19786231Stmm printf("\n"); 19886231Stmm device_printf(dev, " memory decode "); 199117119Stmm apb_map_print(sc->sc_memmap, APB_MEM_SCALE); 20086231Stmm printf("\n"); 20186231Stmm } 20286231Stmm 203178279Smarius device_add_child(dev, "pci", -1); 204117119Stmm return (bus_generic_attach(dev)); 20586231Stmm} 20686231Stmm 20786231Stmm/* 20886231Stmm * We have to trap resource allocation requests and ensure that the bridge 20986231Stmm * is set up to, or capable of handling them. 21086231Stmm */ 21186231Stmmstatic struct resource * 212178279Smariusapb_alloc_resource(device_t dev, device_t child, int type, int *rid, 21386231Stmm u_long start, u_long end, u_long count, u_int flags) 21486231Stmm{ 21588369Stmm struct apb_softc *sc; 21686231Stmm 21786231Stmm sc = device_get_softc(dev); 218145610Smarcel 21986231Stmm /* 22086231Stmm * If this is a "default" allocation against this rid, we can't work 221129051Smarius * out where it's coming from (we should actually never see these) so 222129051Smarius * we just have to punt. 22386231Stmm */ 224145610Smarcel if (start == 0 && end == ~0) { 22586231Stmm device_printf(dev, "can't decode default resource id %d for " 226206019Smarius "%s, bypassing\n", *rid, device_get_nameunit(child)); 227145610Smarcel goto passup; 228145610Smarcel } 22986231Stmm 230145610Smarcel /* 231145610Smarcel * Fail the allocation for this range if it's not supported. 232145610Smarcel * XXX we should probably just fix up the bridge decode and 233145610Smarcel * soldier on. 234145610Smarcel */ 235145610Smarcel switch (type) { 236145610Smarcel case SYS_RES_IOPORT: 237145610Smarcel if (!apb_checkrange(sc->sc_iomap, APB_IO_SCALE, start, end)) { 238206019Smarius device_printf(dev, "device %s requested unsupported " 239206019Smarius "I/O range 0x%lx-0x%lx\n", 240206019Smarius device_get_nameunit(child), start, end); 241145610Smarcel return (NULL); 242145610Smarcel } 243145610Smarcel if (bootverbose) 244145610Smarcel device_printf(sc->sc_bsc.ops_pcib_sc.dev, "device " 245206019Smarius "%s requested decoded I/O range 0x%lx-0x%lx\n", 246206019Smarius device_get_nameunit(child), start, end); 247145610Smarcel break; 24886231Stmm 249145610Smarcel case SYS_RES_MEMORY: 250145610Smarcel if (!apb_checkrange(sc->sc_memmap, APB_MEM_SCALE, start, end)) { 251206019Smarius device_printf(dev, "device %s requested unsupported " 252145610Smarcel "memory range 0x%lx-0x%lx\n", 253206019Smarius device_get_nameunit(child), start, end); 254145610Smarcel return (NULL); 25586231Stmm } 256145610Smarcel if (bootverbose) 257145610Smarcel device_printf(sc->sc_bsc.ops_pcib_sc.dev, "device " 258206019Smarius "%s requested decoded memory range 0x%lx-0x%lx\n", 259206019Smarius device_get_nameunit(child), start, end); 260145610Smarcel break; 261145610Smarcel 262145610Smarcel default: 263145610Smarcel break; 26486231Stmm } 26586231Stmm 266145610Smarcel passup: 26786231Stmm /* 26886231Stmm * Bridge is OK decoding this resource, so pass it up. 26986231Stmm */ 27086231Stmm return (bus_generic_alloc_resource(dev, child, type, rid, start, end, 27186231Stmm count, flags)); 27286231Stmm} 273