if_iee_sbdio.c revision 1.5
1 /* $NetBSD: if_iee_sbdio.c,v 1.5 2008/04/04 17:03:42 tsutsui Exp $ */ 2 3 /* 4 * Copyright (c) 2003 Jochen Kunz. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of Jochen Kunz may not be used to endorse or promote 16 * products derived from this software without specific prior 17 * written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY JOCHEN KUNZ 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JOCHEN KUNZ 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: if_iee_sbdio.c,v 1.5 2008/04/04 17:03:42 tsutsui Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/device.h> 38 39 #include <net/if.h> 40 #include <net/if_dl.h> 41 #include <net/if_media.h> 42 #include <net/if_ether.h> 43 #include <sys/socket.h> 44 #include <sys/mbuf.h> 45 46 #include <mips/cache.h> 47 #include <machine/bus.h> 48 #include <machine/intr.h> 49 #include <machine/sbdvar.h> /* for ether_addr() */ 50 #include <machine/sbdiovar.h> 51 52 #include <dev/ic/i82596reg.h> 53 #include <dev/ic/i82596var.h> 54 55 int iee_sbdio_match(device_t, cfdata_t, void *); 56 void iee_sbdio_attach(device_t, device_t, void *); 57 int iee_sbdio_cmd(struct iee_softc *, uint32_t); 58 int iee_sbdio_reset(struct iee_softc *); 59 60 static void iee_sbdio_channel_attention(void *); 61 static void iee_sbdio_chip_reset(void *); 62 static void iee_sbdio_set_scp(void *, uint32_t); 63 64 struct iee_sbdio_softc { 65 struct iee_softc sc_iee; 66 /* CPU <-> i82589 interface */ 67 volatile uint32_t *sc_port; 68 }; 69 70 CFATTACH_DECL_NEW(iee_sbdio, sizeof(struct iee_sbdio_softc), 71 iee_sbdio_match, iee_sbdio_attach, NULL, NULL); 72 73 int 74 iee_sbdio_match(device_t parent, cfdata_t cf, void *aux) 75 { 76 struct sbdio_attach_args *sa = aux; 77 78 return strcmp(sa->sa_name, "iee") ? 0 : 1; 79 } 80 81 void 82 iee_sbdio_attach(device_t parent, device_t self, void *aux) 83 { 84 struct iee_sbdio_softc *sc_ssc = device_private(self); 85 struct iee_softc *sc = &sc_ssc->sc_iee; 86 struct sbdio_attach_args *sa = aux; 87 uint8_t eaddr[ETHER_ADDR_LEN]; 88 int media[2]; 89 int rsegs; 90 91 sc->sc_dev = self; 92 sc_ssc->sc_port = 93 (volatile uint32_t *)MIPS_PHYS_TO_KSEG1(sa->sa_addr1); 94 sc->sc_type = I82596_CA; 95 sc->sc_flags = IEE_NEED_SWAP; 96 97 98 /* bus_dma round the dma size to page size. */ 99 sc->sc_cl_align = 1; 100 101 sc->sc_dmat = sa->sa_dmat; 102 103 if (bus_dmamem_alloc(sc->sc_dmat, IEE_SHMEM_MAX, PAGE_SIZE, 0, 104 &sc->sc_dma_segs, 1, &rsegs, BUS_DMA_NOWAIT) != 0) { 105 aprint_error(": iee_sbdio_attach: can't allocate %d bytes of " 106 "DMA memory\n", (int)IEE_SHMEM_MAX); 107 return; 108 } 109 110 if (bus_dmamem_map(sc->sc_dmat, &sc->sc_dma_segs, rsegs, IEE_SHMEM_MAX, 111 (void **)sc->sc_shmem_addr, BUS_DMA_NOWAIT) != 0) { 112 aprint_error(": iee_sbdio_attach: can't map DMA memory\n"); 113 bus_dmamem_free(sc->sc_dmat, &sc->sc_dma_segs, rsegs); 114 return; 115 } 116 117 if (bus_dmamap_create(sc->sc_dmat, IEE_SHMEM_MAX, rsegs, 118 IEE_SHMEM_MAX, 0, BUS_DMA_NOWAIT, &sc->sc_shmem_map) != 0) { 119 aprint_error(": iee_sbdio_attach: can't create DMA map\n"); 120 bus_dmamem_unmap(sc->sc_dmat, sc->sc_shmem_addr, IEE_SHMEM_MAX); 121 bus_dmamem_free(sc->sc_dmat, &sc->sc_dma_segs, rsegs); 122 return; 123 } 124 125 if (bus_dmamap_load(sc->sc_dmat, sc->sc_shmem_map, sc->sc_shmem_addr, 126 IEE_SHMEM_MAX, NULL, BUS_DMA_NOWAIT) != 0) { 127 aprint_error(": iee_sbdio_attach: can't load DMA map\n"); 128 bus_dmamap_destroy(sc->sc_dmat, sc->sc_shmem_map); 129 bus_dmamem_unmap(sc->sc_dmat, sc->sc_shmem_addr, IEE_SHMEM_MAX); 130 bus_dmamem_free(sc->sc_dmat, &sc->sc_dma_segs, rsegs); 131 return; 132 } 133 memset(sc->sc_shmem_addr, 0, IEE_SHMEM_MAX); 134 135 mips_dcache_wbinv_range((vaddr_t)sc->sc_shmem_addr, IEE_SHMEM_MAX); 136 sc->sc_shmem_addr = (void *)((vaddr_t)sc->sc_shmem_addr | 137 MIPS_KSEG1_START); 138 139 /* Setup SYSBUS byte. TR2 specific? -uch */ 140 SC_SCP->scp_sysbus = IEE_SYSBUS_BE | IEE_SYSBUS_INT | 141 IEE_SYSBUS_LIEAR | IEE_SYSBUS_STD; 142 143 sc->sc_iee_reset = iee_sbdio_reset; 144 sc->sc_iee_cmd = iee_sbdio_cmd; 145 sc->sc_mediachange = NULL; 146 sc->sc_mediastatus = NULL; 147 148 media[0] = IFM_ETHER | IFM_MANUAL; 149 media[1] = IFM_ETHER | IFM_10_5; 150 151 intr_establish(sa->sa_irq, iee_intr, sc); 152 (*platform.ether_addr)(eaddr); 153 iee_attach(sc, eaddr, media, 2, IFM_ETHER | IFM_10_5); 154 } 155 156 int 157 iee_sbdio_cmd(struct iee_softc *sc, uint32_t cmd) 158 { 159 int retry = 8; 160 int n; 161 162 SC_SCB->scb_cmd = cmd; 163 bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_SCB_OFF, IEE_SCB_SZ, 164 BUS_DMASYNC_PREWRITE); 165 166 iee_sbdio_channel_attention(sc); 167 168 /* Wait for the cmd to finish */ 169 for (n = 0 ; n < retry; n++) { 170 bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_SCB_OFF, 171 IEE_SCB_SZ, BUS_DMASYNC_PREREAD); 172 173 if (SC_SCB->scb_cmd == 0) 174 break; 175 delay(1); 176 } 177 bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_SCB_OFF, IEE_SCB_SZ, 178 BUS_DMASYNC_PREREAD); 179 if (n < retry) 180 return 0; 181 182 printf("%s: command timeout. retry=%d\n", 183 device_xname(sc->sc_dev), retry); 184 185 return -1; 186 } 187 188 int 189 iee_sbdio_reset(struct iee_softc *sc) 190 { 191 #define IEE_ISCP_BUSSY 0x1 192 int n, retry = 8; 193 uint32_t cmd; 194 195 /* Make sure the busy byte is set and the cache is flushed. */ 196 SC_ISCP->iscp_bussy = IEE_ISCP_BUSSY; 197 bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_SCP_OFF, IEE_SCP_SZ 198 + IEE_ISCP_SZ + IEE_SCB_SZ, BUS_DMASYNC_PREWRITE); 199 200 /* Setup the PORT Command with pointer to SCP. */ 201 cmd = IEE_PORT_SCP | IEE_PHYS_SHMEM(IEE_SCP_OFF); 202 203 /* Initiate a Hardware reset. */ 204 printf("%s: reseting chip... ", device_xname(sc->sc_dev)); 205 iee_sbdio_chip_reset(sc); 206 207 /* Set SCP address to CU */ 208 iee_sbdio_set_scp(sc, cmd); 209 210 /* Wait for the chip to initialize and read SCP and ISCP. */ 211 for (n = 0 ; n < retry; n++) { 212 bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_ISCP_OFF, 213 IEE_ISCP_SZ, BUS_DMASYNC_PREREAD); 214 if (SC_ISCP->iscp_bussy != IEE_ISCP_BUSSY) { 215 break; 216 } 217 delay(100); 218 } 219 bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_SCB_OFF, IEE_SCB_SZ, 220 BUS_DMASYNC_PREREAD); 221 222 if (n < retry) { 223 /* ACK interrupts we may have caused */ 224 sc->sc_iee_cmd(sc, IEE_SCB_ACK); 225 printf("done.\n"); 226 227 return 0; 228 } 229 printf("time out.\n"); 230 231 return -1; 232 } 233 234 static void 235 iee_sbdio_channel_attention(void *cookie) 236 { 237 struct iee_sbdio_softc *sc = cookie; 238 uint32_t dummy; 239 240 /* Issue a Channel Attention */ 241 dummy = *sc->sc_port; 242 dummy = *sc->sc_port; 243 } 244 245 static void 246 iee_sbdio_chip_reset(void *cookie) 247 { 248 struct iee_sbdio_softc *sc = cookie; 249 250 *sc->sc_port = 0; 251 *sc->sc_port = 0; 252 delay(10); 253 } 254 255 static void 256 iee_sbdio_set_scp(void *cookie, uint32_t cmd) 257 { 258 struct iee_sbdio_softc *sc = cookie; 259 cmd = (cmd << 16) | (cmd >> 16); 260 261 *sc->sc_port = cmd; 262 *sc->sc_port = cmd; 263 264 /* Issue a Channel Attention to read SCP */ 265 iee_sbdio_channel_attention(cookie); 266 } 267
Indexes created Thu Oct 02 10:09:58 GMT 2025