if_iee_sbdio.c revision 1.6
1 /* $NetBSD: if_iee_sbdio.c,v 1.6 2009/05/05 16:38:41 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 1.6 2009/05/05 16:38:41 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 volatile uint32_t *sc_port; /* CPU <-> i82596 interface */ 67 }; 68 69 CFATTACH_DECL_NEW(iee_sbdio, sizeof(struct iee_sbdio_softc), 70 iee_sbdio_match, iee_sbdio_attach, NULL, NULL); 71 72 int 73 iee_sbdio_match(device_t parent, cfdata_t cf, void *aux) 74 { 75 struct sbdio_attach_args *sa = aux; 76 77 return strcmp(sa->sa_name, "iee") ? 0 : 1; 78 } 79 80 void 81 iee_sbdio_attach(device_t parent, device_t self, void *aux) 82 { 83 struct iee_sbdio_softc *sc_ssc = device_private(self); 84 struct iee_softc *sc = &sc_ssc->sc_iee; 85 struct sbdio_attach_args *sa = aux; 86 uint8_t eaddr[ETHER_ADDR_LEN]; 87 int media[2]; 88 int rsegs; 89 90 sc->sc_dev = self; 91 sc_ssc->sc_port = 92 (volatile uint32_t *)MIPS_PHYS_TO_KSEG1(sa->sa_addr1); 93 sc->sc_type = I82596_CA; 94 sc->sc_flags = IEE_NEED_SWAP; 95 96 /* bus_dma round the dma size to page size. */ 97 sc->sc_cl_align = 1; 98 99 sc->sc_dmat = sa->sa_dmat; 100 101 if (bus_dmamem_alloc(sc->sc_dmat, IEE_SHMEM_MAX, PAGE_SIZE, 0, 102 &sc->sc_dma_segs, 1, &rsegs, BUS_DMA_NOWAIT) != 0) { 103 aprint_error(": can't allocate %d bytes of DMA memory\n", 104 (int)IEE_SHMEM_MAX); 105 return; 106 } 107 108 if (bus_dmamem_map(sc->sc_dmat, &sc->sc_dma_segs, rsegs, IEE_SHMEM_MAX, 109 (void **)sc->sc_shmem_addr, BUS_DMA_NOWAIT) != 0) { 110 aprint_error(": can't map DMA memory\n"); 111 bus_dmamem_free(sc->sc_dmat, &sc->sc_dma_segs, rsegs); 112 return; 113 } 114 115 if (bus_dmamap_create(sc->sc_dmat, IEE_SHMEM_MAX, rsegs, 116 IEE_SHMEM_MAX, 0, BUS_DMA_NOWAIT, &sc->sc_shmem_map) != 0) { 117 aprint_error(": can't create DMA map\n"); 118 bus_dmamem_unmap(sc->sc_dmat, sc->sc_shmem_addr, IEE_SHMEM_MAX); 119 bus_dmamem_free(sc->sc_dmat, &sc->sc_dma_segs, rsegs); 120 return; 121 } 122 123 if (bus_dmamap_load(sc->sc_dmat, sc->sc_shmem_map, sc->sc_shmem_addr, 124 IEE_SHMEM_MAX, NULL, BUS_DMA_NOWAIT) != 0) { 125 aprint_error(": can't load DMA map\n"); 126 bus_dmamap_destroy(sc->sc_dmat, sc->sc_shmem_map); 127 bus_dmamem_unmap(sc->sc_dmat, sc->sc_shmem_addr, IEE_SHMEM_MAX); 128 bus_dmamem_free(sc->sc_dmat, &sc->sc_dma_segs, rsegs); 129 return; 130 } 131 memset(sc->sc_shmem_addr, 0, IEE_SHMEM_MAX); 132 133 mips_dcache_wbinv_range((vaddr_t)sc->sc_shmem_addr, IEE_SHMEM_MAX); 134 sc->sc_shmem_addr = (void *)((vaddr_t)sc->sc_shmem_addr | 135 MIPS_KSEG1_START); 136 137 /* Setup SYSBUS byte. TR2 specific? -uch */ 138 SC_SCP->scp_sysbus = IEE_SYSBUS_BE | IEE_SYSBUS_INT | 139 IEE_SYSBUS_LIEAR | IEE_SYSBUS_STD; 140 141 sc->sc_iee_reset = iee_sbdio_reset; 142 sc->sc_iee_cmd = iee_sbdio_cmd; 143 sc->sc_mediachange = NULL; 144 sc->sc_mediastatus = NULL; 145 146 media[0] = IFM_ETHER | IFM_MANUAL; 147 media[1] = IFM_ETHER | IFM_10_5; 148 149 intr_establish(sa->sa_irq, iee_intr, sc); 150 (*platform.ether_addr)(eaddr); 151 iee_attach(sc, eaddr, media, 2, IFM_ETHER | IFM_10_5); 152 } 153 154 int 155 iee_sbdio_cmd(struct iee_softc *sc, uint32_t cmd) 156 { 157 int retry = 8; 158 int n; 159 160 SC_SCB->scb_cmd = cmd; 161 bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_SCB_OFF, IEE_SCB_SZ, 162 BUS_DMASYNC_PREWRITE); 163 164 iee_sbdio_channel_attention(sc); 165 166 /* Wait for the cmd to finish */ 167 for (n = 0 ; n < retry; n++) { 168 bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_SCB_OFF, 169 IEE_SCB_SZ, BUS_DMASYNC_PREREAD); 170 171 if (SC_SCB->scb_cmd == 0) 172 break; 173 delay(1); 174 } 175 bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_SCB_OFF, IEE_SCB_SZ, 176 BUS_DMASYNC_PREREAD); 177 if (n < retry) 178 return 0; 179 180 printf("%s: command timeout. retry=%d\n", 181 device_xname(sc->sc_dev), retry); 182 183 return -1; 184 } 185 186 int 187 iee_sbdio_reset(struct iee_softc *sc) 188 { 189 #define IEE_ISCP_BUSSY 0x1 190 int n, retry = 8; 191 uint32_t cmd; 192 193 /* Make sure the busy byte is set and the cache is flushed. */ 194 SC_ISCP->iscp_bussy = IEE_ISCP_BUSSY; 195 bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_SCP_OFF, IEE_SCP_SZ 196 + IEE_ISCP_SZ + IEE_SCB_SZ, BUS_DMASYNC_PREWRITE); 197 198 /* Setup the PORT Command with pointer to SCP. */ 199 cmd = IEE_PORT_SCP | IEE_PHYS_SHMEM(IEE_SCP_OFF); 200 201 /* Initiate a Hardware reset. */ 202 printf("%s: reseting chip... ", device_xname(sc->sc_dev)); 203 iee_sbdio_chip_reset(sc); 204 205 /* Set SCP address to CU */ 206 iee_sbdio_set_scp(sc, cmd); 207 208 /* Wait for the chip to initialize and read SCP and ISCP. */ 209 for (n = 0 ; n < retry; n++) { 210 bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_ISCP_OFF, 211 IEE_ISCP_SZ, BUS_DMASYNC_PREREAD); 212 if (SC_ISCP->iscp_bussy != IEE_ISCP_BUSSY) { 213 break; 214 } 215 delay(100); 216 } 217 bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_SCB_OFF, IEE_SCB_SZ, 218 BUS_DMASYNC_PREREAD); 219 220 if (n < retry) { 221 /* ACK interrupts we may have caused */ 222 sc->sc_iee_cmd(sc, IEE_SCB_ACK); 223 printf("done.\n"); 224 225 return 0; 226 } 227 printf("time out.\n"); 228 229 return -1; 230 } 231 232 static void 233 iee_sbdio_channel_attention(void *cookie) 234 { 235 struct iee_sbdio_softc *sc = cookie; 236 uint32_t dummy; 237 238 /* Issue a Channel Attention */ 239 dummy = *sc->sc_port; 240 dummy = *sc->sc_port; 241 } 242 243 static void 244 iee_sbdio_chip_reset(void *cookie) 245 { 246 struct iee_sbdio_softc *sc = cookie; 247 248 *sc->sc_port = 0; 249 *sc->sc_port = 0; 250 delay(10); 251 } 252 253 static void 254 iee_sbdio_set_scp(void *cookie, uint32_t cmd) 255 { 256 struct iee_sbdio_softc *sc = cookie; 257 cmd = (cmd << 16) | (cmd >> 16); 258 259 *sc->sc_port = cmd; 260 *sc->sc_port = cmd; 261 262 /* Issue a Channel Attention to read SCP */ 263 iee_sbdio_channel_attention(cookie); 264 } 265
Indexes created Wed Oct 01 15:09:59 GMT 2025