if_iee_sbdio.c revision 1.8
1 /* $NetBSD: if_iee_sbdio.c,v 1.8 2009/05/09 03:22:20 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 1.8 2009/05/09 03:22:20 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 89 sc->sc_dev = self; 90 sc_ssc->sc_port = 91 (volatile uint32_t *)MIPS_PHYS_TO_KSEG1(sa->sa_addr1); 92 sc->sc_type = I82596_CA; 93 sc->sc_flags = IEE_NEED_SWAP; 94 95 /* bus_dma round the dma size to page size. */ 96 sc->sc_cl_align = 1; 97 98 sc->sc_dmat = sa->sa_dmat; 99 100 /* Setup SYSBUS byte. TR2 specific? -uch */ 101 sc->sc_sysbus = IEE_SYSBUS_BE | IEE_SYSBUS_INT | 102 IEE_SYSBUS_LIEAR | IEE_SYSBUS_STD; 103 104 sc->sc_iee_reset = iee_sbdio_reset; 105 sc->sc_iee_cmd = iee_sbdio_cmd; 106 sc->sc_mediachange = NULL; 107 sc->sc_mediastatus = NULL; 108 109 media[0] = IFM_ETHER | IFM_MANUAL; 110 media[1] = IFM_ETHER | IFM_10_5; 111 112 intr_establish(sa->sa_irq, iee_intr, sc); 113 (*platform.ether_addr)(eaddr); 114 iee_attach(sc, eaddr, media, 2, IFM_ETHER | IFM_10_5); 115 } 116 117 int 118 iee_sbdio_cmd(struct iee_softc *sc, uint32_t cmd) 119 { 120 int retry = 8; 121 int n; 122 uint32_t ack; 123 124 SC_SCB->scb_cmd = cmd; 125 bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_SCB_OFF, IEE_SCB_SZ, 126 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 127 128 iee_sbdio_channel_attention(sc); 129 130 /* Wait for the cmd to finish */ 131 for (n = 0 ; n < retry; n++) { 132 bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_SCB_OFF, 133 IEE_SCB_SZ, BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 134 ack = SC_SCB->scb_cmd; 135 bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_SCB_OFF, 136 IEE_SCB_SZ, BUS_DMASYNC_PREREAD); 137 if (ack == 0) 138 break; 139 delay(1); 140 } 141 if (n < retry) 142 return 0; 143 144 printf("%s: command timeout. retry=%d\n", 145 device_xname(sc->sc_dev), retry); 146 147 return -1; 148 } 149 150 int 151 iee_sbdio_reset(struct iee_softc *sc) 152 { 153 #define IEE_ISCP_BUSSY 0x1 154 int n, retry = 8; 155 uint32_t cmd, ack; 156 157 /* Make sure the busy byte is set and the cache is flushed. */ 158 SC_ISCP->iscp_bussy = IEE_ISCP_BUSSY; 159 bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, 160 IEE_SCP_OFF, IEE_SCP_SZ + IEE_ISCP_SZ + IEE_SCB_SZ, 161 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 162 163 /* Setup the PORT Command with pointer to SCP. */ 164 cmd = IEE_PORT_SCP | IEE_PHYS_SHMEM(IEE_SCP_OFF); 165 166 /* Initiate a Hardware reset. */ 167 printf("%s: reseting chip... ", device_xname(sc->sc_dev)); 168 iee_sbdio_chip_reset(sc); 169 170 /* Set SCP address to CU */ 171 iee_sbdio_set_scp(sc, cmd); 172 173 /* Wait for the chip to initialize and read SCP and ISCP. */ 174 for (n = 0 ; n < retry; n++) { 175 bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_ISCP_OFF, 176 IEE_ISCP_SZ, BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 177 ack = SC_ISCP->iscp_bussy; 178 bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_ISCP_OFF, 179 IEE_ISCP_SZ, BUS_DMASYNC_PREREAD); 180 if (ack != IEE_ISCP_BUSSY) { 181 break; 182 } 183 delay(100); 184 } 185 186 if (n < retry) { 187 /* ACK interrupts we may have caused */ 188 sc->sc_iee_cmd(sc, IEE_SCB_ACK); 189 printf("done.\n"); 190 191 return 0; 192 } 193 printf("time out.\n"); 194 195 return -1; 196 } 197 198 static void 199 iee_sbdio_channel_attention(void *cookie) 200 { 201 struct iee_sbdio_softc *sc = cookie; 202 uint32_t dummy; 203 204 /* Issue a Channel Attention */ 205 dummy = *sc->sc_port; 206 dummy = *sc->sc_port; 207 } 208 209 static void 210 iee_sbdio_chip_reset(void *cookie) 211 { 212 struct iee_sbdio_softc *sc = cookie; 213 214 *sc->sc_port = 0; 215 *sc->sc_port = 0; 216 delay(10); 217 } 218 219 static void 220 iee_sbdio_set_scp(void *cookie, uint32_t cmd) 221 { 222 struct iee_sbdio_softc *sc = cookie; 223 cmd = (cmd << 16) | (cmd >> 16); 224 225 *sc->sc_port = cmd; 226 *sc->sc_port = cmd; 227 228 /* Issue a Channel Attention to read SCP */ 229 iee_sbdio_channel_attention(cookie); 230 } 231
Indexes created Thu Oct 02 01:09:59 GMT 2025