1 /* $NetBSD: if_cs.c,v 1.10 2015/04/13 21:18:40 riastradh Exp $ */ 2 3 /* 4 * Copyright (c) 2004 Christopher Gilbert 5 * All rights reserved. 6 * 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 * 3. The name of the author may be used to endorse or promote products 13 * derived from this software without specific prior written permission. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 16 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 17 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 /* 28 * Copyright 1997 29 * Digital Equipment Corporation. All rights reserved. 30 * 31 * This software is furnished under license and may be used and 32 * copied only in accordance with the following terms and conditions. 33 * Subject to these conditions, you may download, copy, install, 34 * use, modify and distribute this software in source and/or binary 35 * form. No title or ownership is transferred hereby. 36 * 37 * 1) Any source code used, modified or distributed must reproduce 38 * and retain this copyright notice and list of conditions as 39 * they appear in the source file. 40 * 41 * 2) No right is granted to use any trade name, trademark, or logo of 42 * Digital Equipment Corporation. Neither the "Digital Equipment 43 * Corporation" name nor any trademark or logo of Digital Equipment 44 * Corporation may be used to endorse or promote products derived 45 * from this software without the prior written permission of 46 * Digital Equipment Corporation. 47 * 48 * 3) This software is provided "AS-IS" and any express or implied 49 * warranties, including but not limited to, any implied warranties 50 * of merchantability, fitness for a particular purpose, or 51 * non-infringement are disclaimed. In no event shall DIGITAL be 52 * liable for any damages whatsoever, and in particular, DIGITAL 53 * shall not be liable for special, indirect, consequential, or 54 * incidental damages or damages for lost profits, loss of 55 * revenue or loss of use, whether such damages arise in contract, 56 * negligence, tort, under statute, in equity, at law or otherwise, 57 * even if advised of the possibility of such damage. 58 */ 59 60 #include <sys/cdefs.h> 61 __KERNEL_RCSID(0, "$NetBSD: if_cs.c,v 1.10 2015/04/13 21:18:40 riastradh Exp $"); 62 63 #include <sys/param.h> 64 #include <sys/systm.h> 65 #include <sys/socket.h> 66 #include <sys/device.h> 67 #include <sys/bus.h> 68 69 #include <net/if.h> 70 #include <net/if_ether.h> 71 #include <net/if_media.h> 72 73 #include <machine/intr.h> 74 75 #include <acorn32/eb7500atx/rsbus.h> 76 77 #include <dev/ic/cs89x0reg.h> 78 #include <dev/ic/cs89x0var.h> 79 80 /* 81 * the CS network interface is accessed at the following address locations: 82 * 030104f1 CS8920 PNP Low 83 * 03010600 03010640 CS8920 Default I/O registers 84 * 030114f1 CS8920 PNP High 85 * 03014000 03016000 CS8920 Default Memory 86 * 87 * IRQ is mapped as: 88 * CS8920 IRQ 3 INT5 89 * 90 * It must be configured as the following: 91 * The CS8920 PNP address should be configured for ISA base at 0x300 92 * to achieve the default register mapping as specified. 93 * Note memory addresses are all have bit 23 tied high in hardware. 94 * This only effects the value programmed into the CS8920 memory offset 95 * registers. 96 * 97 * Just to add to the fun the I/O registers are layed out as: 98 * xxxxR1R0 99 * xxxxR3R2 100 * xxxxR5R4 101 * 102 * This works fine for 16bit accesses, but it makes access to single 103 * register hard (which does happen on a reset, as we've got to toggle 104 * the chip into 16bit mode) 105 * 106 * Network DRQ is connected to DRQ5 107 */ 108 109 /* 110 * make a private tag so that we can use rsbus's map/unmap 111 */ 112 static struct bus_space cs_rsbus_bs_tag; 113 114 int cs_rsbus_probe(device_t, cfdata_t, void *); 115 void cs_rsbus_attach(device_t, device_t, void *); 116 117 static uint8_t cs_rbus_read_1(struct cs_softc *, bus_size_t); 118 119 CFATTACH_DECL_NEW(cs_rsbus, sizeof(struct cs_softc), 120 cs_rsbus_probe, cs_rsbus_attach, NULL, NULL); 121 122 /* Available media */ 123 int cs_rbus_media [] = { 124 IFM_ETHER|IFM_10_T|IFM_FDX, 125 IFM_ETHER|IFM_10_T 126 }; 127 128 int 129 cs_rsbus_probe(device_t parent, cfdata_t cf, void *aux) 130 { 131 /* for now it'll always attach */ 132 return 1; 133 } 134 135 void 136 cs_rsbus_attach(device_t parent, device_t self, void *aux) 137 { 138 struct cs_softc *sc = device_private(self); 139 struct rsbus_attach_args *rs = aux; 140 u_int iobase; 141 142 sc->sc_dev = self; 143 144 /* member copy */ 145 cs_rsbus_bs_tag = *rs->sa_iot; 146 147 /* registers are normally accessed in pairs, on a 4 byte aligned */ 148 cs_rsbus_bs_tag.bs_cookie = (void *) 1; 149 150 sc->sc_iot = sc->sc_memt = &cs_rsbus_bs_tag; 151 152 #if 0 /* Do DMA later */ 153 if (ia->ia_ndrq > 0) 154 isc->sc_drq = ia->ia_drq[0].ir_drq; 155 else 156 isc->sc_drq = -1; 157 #endif 158 159 /* device always interrupts on 3 but that routes to IRQ 5 */ 160 sc->sc_irq = 3; 161 162 printf("\n"); 163 164 /* 165 * Map the device. 166 */ 167 iobase = 0x03010600; 168 if (bus_space_map(sc->sc_iot, iobase, CS8900_IOSIZE * 4, 169 0, &sc->sc_ioh)) { 170 printf("%s: unable to map i/o space\n", device_xname(self)); 171 return; 172 } 173 174 #if 0 175 if (bus_space_map(sc->sc_memt, iobase + 0x3A00, 176 CS8900_MEMSIZE * 4, 0, &sc->sc_memh)) { 177 printf("%s: unable to map memory space\n", device_xname(self)); 178 } else { 179 sc->sc_cfgflags |= CFGFLG_MEM_MODE | CFGFLG_USE_SA; 180 sc->sc_pktpgaddr = 1<<23; 181 //(0x4000 >> 1) | (1<<23); 182 } 183 #endif 184 sc->sc_ih = intr_claim(IRQ_INT5, IPL_NET, "cs", cs_intr, sc); 185 if (sc->sc_ih == NULL) { 186 printf("%s: unable to establish interrupt\n", 187 device_xname(sc->sc_dev)); 188 return; 189 } 190 191 /* DMA is for later */ 192 sc->sc_dma_chipinit = NULL; 193 sc->sc_dma_attach = NULL; 194 sc->sc_dma_process_rx = NULL; 195 196 sc->sc_cfgflags |= CFGFLG_PARSE_EEPROM; 197 sc->sc_io_read_1 = cs_rbus_read_1; 198 199 /* 200 * also provide media, otherwise it attempts to read the media from 201 * the EEPROM, which again fails 202 */ 203 cs_attach(sc, NULL, cs_rbus_media, sizeof(cs_rbus_media) / sizeof(cs_rbus_media[0]), 204 IFM_ETHER|IFM_10_T|IFM_FDX); 205 } 206 207 /* 208 * Provide a function to correctly do reading from oddly numbered registers 209 * as you can't simply shift the register number 210 */ 211 static uint8_t 212 cs_rbus_read_1(struct cs_softc *sc, bus_size_t a) 213 { 214 bus_size_t offset; 215 /* 216 * if it's an even address then just use the bus_space_read_1 217 */ 218 if ((a & 1) == 0) 219 { 220 return bus_space_read_1(sc->sc_iot, sc->sc_ioh, a); 221 } 222 /* 223 * otherwise we've get to work out the aligned address and then add 224 * one 225 */ 226 offset = (a & ~1) << 1; 227 offset++; 228 229 /* and read it, with no shift (cookie is 0) */ 230 return sc->sc_iot->bs_r_1(0, (sc)->sc_ioh, offset); 231 } 232