1/* 2 * Copyright (c) 2001 HAMAJIMA Katsuomi. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 */ 25 26#include <sys/cdefs.h> 27__KERNEL_RCSID(0, "$NetBSD: vrdcu.c,v 1.7 2012/10/27 17:17:55 chs Exp $"); 28 29#include <sys/param.h> 30#include <sys/systm.h> 31#include <sys/device.h> 32 33#include <uvm/uvm_extern.h> 34 35#include <machine/cpu.h> 36#include <machine/bus.h> 37#include <machine/bus_dma_hpcmips.h> 38 39#include <hpcmips/vr/vripif.h> 40#include <hpcmips/vr/dcureg.h> 41 42#ifdef VRDCU_DEBUG 43int vrdcu_debug = VRDCU_DEBUG; 44#define DPRINTFN(n,x) if (vrdcu_debug>(n)) printf x; 45#else 46#define DPRINTFN(n,x) 47#endif 48 49struct vrdcu_softc { 50 bus_space_tag_t sc_iot; 51 bus_space_handle_t sc_ioh; 52 struct vrdcu_chipset_tag sc_chipset; 53 int sc_status; /* DMA status */ 54}; 55 56int vrdcu_match(device_t, cfdata_t, void *); 57void vrdcu_attach(device_t, device_t, void *); 58 59CFATTACH_DECL_NEW(vrdcu, sizeof(struct vrdcu_softc), 60 vrdcu_match, vrdcu_attach, NULL, NULL); 61 62int vrdcu_enable_aiuin(vrdcu_chipset_tag_t); 63int vrdcu_enable_aiuout(vrdcu_chipset_tag_t); 64int vrdcu_enable_fir(vrdcu_chipset_tag_t); 65void vrdcu_disable(vrdcu_chipset_tag_t); 66void vrdcu_fir_direction(vrdcu_chipset_tag_t, int); 67int _vrdcu_dmamem_alloc(bus_dma_tag_t, bus_size_t, bus_size_t, 68 bus_size_t, bus_dma_segment_t *, int, int *, int); 69 70struct bus_dma_tag vrdcu_bus_dma_tag = { 71 NULL, 72 { 73 _hpcmips_bd_map_create, 74 _hpcmips_bd_map_destroy, 75 _hpcmips_bd_map_load, 76 _hpcmips_bd_map_load_mbuf, 77 _hpcmips_bd_map_load_uio, 78 _hpcmips_bd_map_load_raw, 79 _hpcmips_bd_map_unload, 80 _hpcmips_bd_map_sync, 81 _vrdcu_dmamem_alloc, 82 _hpcmips_bd_mem_free, 83 _hpcmips_bd_mem_map, 84 _hpcmips_bd_mem_unmap, 85 _hpcmips_bd_mem_mmap, 86 }, 87}; 88 89int 90vrdcu_match(device_t parent, cfdata_t cf, void *aux) 91{ 92 return 2; /* 1st attach group of vrip */ 93} 94 95void 96vrdcu_attach(device_t parent, device_t self, void *aux) 97{ 98 struct vrip_attach_args *va = aux; 99 struct vrdcu_softc *sc = device_private(self); 100 101 sc->sc_iot = va->va_iot; 102 sc->sc_chipset.dc_sc = sc; 103 sc->sc_chipset.dc_enable_aiuin = vrdcu_enable_aiuin; 104 sc->sc_chipset.dc_enable_aiuout = vrdcu_enable_aiuout; 105 sc->sc_chipset.dc_enable_fir = vrdcu_enable_fir; 106 sc->sc_chipset.dc_disable = vrdcu_disable; 107 sc->sc_chipset.dc_fir_direction = vrdcu_fir_direction; 108 109 if (bus_space_map(sc->sc_iot, va->va_addr, va->va_size, 110 0 /* no flags */, &sc->sc_ioh)) { 111 printf("%s: can't map i/o space\n", device_xname(self)); 112 return; 113 } 114 printf("\n"); 115 vrip_register_dcu(va->va_vc, &sc->sc_chipset); 116 117 sc->sc_status = DMASDS; 118 /* reset DCU */ 119 bus_space_write_2(sc->sc_iot, sc->sc_ioh, DMARST_REG_W, DMARST); 120} 121 122int 123vrdcu_enable_aiuin(vrdcu_chipset_tag_t dc) 124{ 125 struct vrdcu_softc *sc = dc->dc_sc; 126 int mask; 127 128 DPRINTFN(1, ("vrdcu_enable_aiuin\n")); 129 130 if (sc->sc_status){ 131 mask = bus_space_read_2(sc->sc_iot, sc->sc_ioh, DMAMSK_REG_W); 132 if (mask & DMAMSKAIN) { 133 DPRINTFN(0, ("vrdcu_enable_aiuin: already enabled\n")); 134 return 0; 135 } else { 136 DPRINTFN(0, ("vrdcu_enable_aiuin: device busy\n")); 137 return EBUSY; 138 } 139 } 140 sc->sc_status = DMASEN; 141 bus_space_write_2(sc->sc_iot, sc->sc_ioh, DMAMSK_REG_W, DMAMSKAIN); 142 bus_space_write_2(sc->sc_iot, sc->sc_ioh, DMASEN_REG_W, sc->sc_status); 143 return 0; 144} 145 146int 147vrdcu_enable_aiuout(vrdcu_chipset_tag_t dc) 148{ 149 struct vrdcu_softc *sc = dc->dc_sc; 150 int mask; 151 152 DPRINTFN(1, ("vrdcu_enable_aiuout\n")); 153 154 if (sc->sc_status){ 155 mask = bus_space_read_2(sc->sc_iot, sc->sc_ioh, DMAMSK_REG_W); 156 if (mask & DMAMSKAOUT) { 157 DPRINTFN(0, ("vrdcu_enable_aiuout: already enabled\n")); 158 return 0; 159 } else { 160 DPRINTFN(0, ("vrdcu_enable_aiuout: device busy\n")); 161 return EBUSY; 162 } 163 } 164 sc->sc_status = DMASEN; 165 bus_space_write_2(sc->sc_iot, sc->sc_ioh, DMAMSK_REG_W, DMAMSKAOUT); 166 bus_space_write_2(sc->sc_iot, sc->sc_ioh, DMASEN_REG_W, sc->sc_status); 167 return 0; 168} 169 170int 171vrdcu_enable_fir(vrdcu_chipset_tag_t dc) 172{ 173 struct vrdcu_softc *sc = dc->dc_sc; 174 int mask; 175 176 DPRINTFN(1, ("vrdcu_enable_fir\n")); 177 178 if (sc->sc_status){ 179 mask = bus_space_read_2(sc->sc_iot, sc->sc_ioh, DMAMSK_REG_W); 180 if (mask & DMAMSKFOUT) { 181 DPRINTFN(0, ("vrdcu_enable_fir: already enabled\n")); 182 return 0; 183 } else { 184 DPRINTFN(0, ("vrdcu_enable_fir: device busy\n")); 185 return EBUSY; 186 } 187 } 188 sc->sc_status = DMASEN; 189 bus_space_write_2(sc->sc_iot, sc->sc_ioh, DMAMSK_REG_W, DMAMSKFOUT); 190 bus_space_write_2(sc->sc_iot, sc->sc_ioh, DMASEN_REG_W, sc->sc_status); 191 return 0; 192} 193 194void 195vrdcu_disable(vrdcu_chipset_tag_t dc) 196{ 197 struct vrdcu_softc *sc = dc->dc_sc; 198 199 DPRINTFN(1, ("vrdcu_disable\n")); 200 201 sc->sc_status = DMASDS; 202 bus_space_write_2(sc->sc_iot, sc->sc_ioh, DMASEN_REG_W, sc->sc_status); 203} 204 205void 206vrdcu_fir_direction(vrdcu_chipset_tag_t dc, int dir) 207{ 208 struct vrdcu_softc *sc = dc->dc_sc; 209 210 DPRINTFN(1, ("vrdcu_fir_direction: dir %d\n", dir)); 211 212 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 213 DMATD_REG_W, dir & DMATDMASK); 214} 215 216int 217_vrdcu_dmamem_alloc(bus_dma_tag_t t, bus_size_t size, bus_size_t alignment, 218 bus_size_t boundary, bus_dma_segment_t *segs, 219 int nsegs, int *rsegs, int flags) 220{ 221 paddr_t high; 222 223 DPRINTFN(1, ("_vrdcu_dmamem_alloc\n")); 224 225 high = (pmap_limits.avail_end < VRDMAAU_BOUNCE_THRESHOLD ? 226 pmap_limits.avail_end : VRDMAAU_BOUNCE_THRESHOLD) - PAGE_SIZE; 227 alignment = alignment > VRDMAAU_ALIGNMENT ? 228 alignment : VRDMAAU_ALIGNMENT; 229 230 return _hpcmips_bd_mem_alloc_range(t, size, alignment, boundary, 231 segs, nsegs, rsegs, flags, 232 pmap_limits.avail_start, high); 233} 234