/* $NetBSD: if_ed_zbus.c,v 1.2 2012/10/27 21:13:03 phx Exp $ */ /*- * Copyright (c) 2012 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Frank Wille. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * Device driver for the Hydra Systems and ASDG ethernet cards. * Based on the National Semiconductor DS8390/WD83C690. */ #include __KERNEL_RCSID(0, "$NetBSD: if_ed_zbus.c,v 1.2 2012/10/27 21:13:03 phx Exp $"); #include #include #include #include #include #include #include #include #include #include #include #define ETHER_PAD_LEN (ETHER_MIN_LEN - ETHER_CRC_LEN) /* Hydra Systems AmigaNet */ #define HYDRA_MANID 2121 #define HYDRA_PRODID 1 #define HYDRA_REGADDR 0xffe1 #define HYDRA_MEMADDR 0 #define HYDRA_PROMADDR 0xffc0 /* ASDG LANRover */ #define ASDG_MANID 1023 #define ASDG_PRODID 254 #define ASDG_REGADDR 0x1 #define ASDG_MEMADDR 0x8000 #define ASDG_PROMADDR 0x100 /* Buffer size is always 16k */ #define ED_ZBUS_MEMSIZE 0x4000 int ed_zbus_match(device_t, cfdata_t , void *); void ed_zbus_attach(device_t, device_t, void *); int ed_zbus_test_mem(struct dp8390_softc *); void ed_zbus_read_hdr(struct dp8390_softc *, int, struct dp8390_ring *); int ed_zbus_ring_copy(struct dp8390_softc *, int, void *, u_short); int ed_zbus_write_mbuf(struct dp8390_softc *, struct mbuf *, int); struct ed_zbus_softc { struct dp8390_softc sc_dp8390; struct bus_space_tag sc_bst; struct isr sc_isr; }; CFATTACH_DECL_NEW(ed_zbus, sizeof(struct ed_zbus_softc), ed_zbus_match, ed_zbus_attach, NULL, NULL); int ed_zbus_match(device_t parent, cfdata_t cf, void *aux) { struct zbus_args *zap = aux; if (zap->manid == HYDRA_MANID && zap->prodid == HYDRA_PRODID) return 1; else if (zap->manid == ASDG_MANID && zap->prodid == ASDG_PRODID) return 1; return 0; } void ed_zbus_attach(device_t parent, device_t self, void *aux) { struct ed_zbus_softc *zsc = device_private(self); struct dp8390_softc *sc = &zsc->sc_dp8390; struct zbus_args *zap = aux; bus_space_handle_t promh; bus_addr_t memaddr, promaddr, regaddr; int i; zsc->sc_bst.base = (bus_addr_t)zap->va; zsc->sc_bst.absm = &amiga_bus_stride_1; if (zap->manid == HYDRA_MANID) { regaddr = HYDRA_REGADDR; memaddr = HYDRA_MEMADDR; promaddr = HYDRA_PROMADDR; } else { regaddr = ASDG_REGADDR; memaddr = ASDG_MEMADDR; promaddr = ASDG_PROMADDR; } sc->sc_dev = self; sc->sc_regt = &zsc->sc_bst; sc->sc_buft = &zsc->sc_bst; if (bus_space_map(sc->sc_regt, regaddr, 0x20, 0, &sc->sc_regh)) { aprint_error_dev(self, "can't map i/o space\n"); return; } if (bus_space_map(sc->sc_buft, memaddr, ED_ZBUS_MEMSIZE, 0, &sc->sc_bufh)) { aprint_error_dev(self, "can't map buffer space\n"); return; } /* SRAM buffer size is always 16K */ sc->mem_start = 0; sc->mem_size = ED_ZBUS_MEMSIZE; /* * Read the ethernet address from the PROM. * Interrupts must be inactive when reading the PROM, as the * interrupt line is shared with one of its address lines. */ NIC_PUT(sc->sc_regt, sc->sc_regh, ED_P0_IMR, 0x00); NIC_PUT(sc->sc_regt, sc->sc_regh, ED_P0_ISR, 0xff); if (bus_space_map(&zsc->sc_bst, promaddr, ETHER_ADDR_LEN * 2, 0, &promh) == 0) { for (i = 0; i < ETHER_ADDR_LEN; i++) sc->sc_enaddr[i] = bus_space_read_1(&zsc->sc_bst, promh, i * 2); bus_space_unmap(&zsc->sc_bst, promh, ETHER_ADDR_LEN * 2); } /* Initialize sc_reg_map[]. Registers have stride 2 on the bus. */ for (i = 0; i < 16; i++) sc->sc_reg_map[i] = i << 1; /* * Set 2 word FIFO threshold, no auto-init Remote DMA, * byte order 68k, word-wide DMA xfers. */ sc->dcr_reg = ED_DCR_FT0 | ED_DCR_WTS | ED_DCR_LS | ED_DCR_BOS; /* Remote DMA abort .*/ sc->cr_proto = ED_CR_RD2; /* * Override all functions which deal with the buffer, because * this implementation only allows 16-bit buffer accesses. */ sc->test_mem = ed_zbus_test_mem; sc->read_hdr = ed_zbus_read_hdr; sc->ring_copy = ed_zbus_ring_copy; sc->write_mbuf = ed_zbus_write_mbuf; sc->sc_flags = device_cfdata(self)->cf_flags; sc->is790 = 0; sc->sc_media_init = dp8390_media_init; sc->sc_enabled = 1; /* Do generic DS8390/WD83C690 config. */ if (dp8390_config(sc)) { bus_space_unmap(sc->sc_buft, sc->sc_bufh, ED_ZBUS_MEMSIZE); bus_space_unmap(sc->sc_regt, sc->sc_regh, 0x10); return; } /* establish level 2 interrupt handler */ zsc->sc_isr.isr_intr = dp8390_intr; zsc->sc_isr.isr_arg = sc; zsc->sc_isr.isr_ipl = 2; add_isr(&zsc->sc_isr); } int ed_zbus_test_mem(struct dp8390_softc *sc) { bus_space_tag_t buft = sc->sc_buft; bus_space_handle_t bufh = sc->sc_bufh; int i; bus_space_set_region_2(buft, bufh, sc->mem_start, 0, sc->mem_size >> 1); for (i = 0; i < sc->mem_size; i += 2) { if (bus_space_read_2(sc->sc_buft, sc->sc_bufh, i)) { printf(": failed to clear NIC buffer at offset %x - " "check configuration\n", (sc->mem_start + i)); return 1; } } return 0; } void ed_zbus_read_hdr(struct dp8390_softc *sc, int src, struct dp8390_ring *hdrp) { bus_space_tag_t buft = sc->sc_buft; bus_space_handle_t bufh = sc->sc_bufh; uint16_t wrd[2]; /* * Read the 4-byte header as two 16-bit words in little-endian * format. Convert into big-endian and put them into hdrp. */ bus_space_read_region_stream_2(buft, bufh, src, wrd, 2); hdrp->rsr = wrd[0] & 0xff; hdrp->next_packet = wrd[0] >> 8; hdrp->count = bswap16(wrd[1]); } /* * Copy `amount' bytes from a packet in the ring buffer to a linear * destination buffer, given a source offset and destination address. * Takes into account ring-wrap. */ int ed_zbus_ring_copy(struct dp8390_softc *sc, int src, void *dst, u_short amount) { bus_space_tag_t buft = sc->sc_buft; bus_space_handle_t bufh = sc->sc_bufh; u_short tmp_amount; u_char readbyte[2]; /* Does copy wrap to lower addr in ring buffer? */ if (src + amount > sc->mem_end) { tmp_amount = sc->mem_end - src; /* copy amount up to end of NIC memory */ bus_space_read_region_stream_2(buft, bufh, src, dst, tmp_amount >> 1); amount -= tmp_amount; src = sc->mem_ring; dst = (u_char *)dst + tmp_amount; } bus_space_read_region_stream_2(buft, bufh, src, dst, amount >> 1); /* handle odd length packet */ if (amount & 1) { bus_space_read_region_stream_2(buft, bufh, src + amount - 1, (u_int16_t *)readbyte, 1); *((u_char *)dst + amount - 1) = readbyte[0]; amount++; } return src + amount; } /* * Copy packet from mbuf to the board memory. Currently uses an extra * buffer/extra memory copy, unless the whole packet fits in one mbuf. * As in the test_mem function, we use word-wide writes. */ int ed_zbus_write_mbuf(struct dp8390_softc *sc, struct mbuf *m, int buf) { u_char *data, savebyte[2]; int len, wantbyte; u_short totlen = 0; wantbyte = 0; for (; m ; m = m->m_next) { data = mtod(m, u_char *); len = m->m_len; totlen += len; if (len > 0) { /* Finish the last word. */ if (wantbyte) { savebyte[1] = *data; bus_space_write_region_stream_2(sc->sc_buft, sc->sc_bufh, buf, (u_int16_t *)savebyte, 1); buf += 2; data++; len--; wantbyte = 0; } /* Output contiguous words. */ if (len > 1) { bus_space_write_region_stream_2(sc->sc_buft, sc->sc_bufh, buf, (u_int16_t *)data, len >> 1); buf += len & ~1; data += len & ~1; len &= 1; } /* Save last byte, if necessary. */ if (len == 1) { savebyte[0] = *data; wantbyte = 1; } } } len = ETHER_PAD_LEN - totlen; if (wantbyte) { savebyte[1] = 0; bus_space_write_region_stream_2(sc->sc_buft, sc->sc_bufh, buf, (u_int16_t *)savebyte, 1); buf += 2; totlen++; len--; } /* if sent data is shorter than EHTER_PAD_LEN, put 0 to padding */ if (len > 0) { bus_space_set_region_2(sc->sc_buft, sc->sc_bufh, buf, 0, len >> 1); totlen = ETHER_PAD_LEN; } return totlen; }