/* $NetBSD: if_ei.c,v 1.4 2001/12/21 22:33:28 bjh21 Exp $ */ /*- * Copyright (c) 2000, 2001 Ben Harris * All rights reserved. * * 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. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. */ /* * if_ei.c -- driver for Acorn AKA25 Ether1 card */ /* * This is not directly based on the arm32 ie driver, as that doesn't * use the MI 82586 driver, and generally looks a mess (not to mention * having dodgy copyright status). Let's try again. */ #include __KERNEL_RCSID(0, "$NetBSD: if_ei.c,v 1.4 2001/12/21 22:33:28 bjh21 Exp $"); #include #include #include #include /* For bootverbose */ #include #include #include #include #include #include #include #include #include #include #include #include /* Callbacks from the MI 82586 driver */ static void ei_hwreset(struct ie_softc *, int); /* static void ei_hwinit(struct ie_softc *); */ static void ei_attn(struct ie_softc *, int); static int ei_intrhook(struct ie_softc *, int); static void ei_copyin(struct ie_softc *, void *, int, size_t); static void ei_copyout(struct ie_softc *, const void *, int, size_t); static u_int16_t ei_read16(struct ie_softc *, int); static void ei_write16(struct ie_softc *, int, u_int16_t); static void ei_write24(struct ie_softc *, int, int); /* autoconfiguration glue */ static int ei_match(struct device *, struct cfdata *, void *); static void ei_attach(struct device *, struct device *, void *); struct ei_softc { struct ie_softc sc_ie; bus_space_tag_t sc_ctl_t; bus_space_handle_t sc_ctl_h; bus_space_tag_t sc_mem_t; bus_space_handle_t sc_mem_h; bus_space_tag_t sc_rom_t; bus_space_handle_t sc_rom_h; u_int8_t sc_idrom[EI_ROMSIZE]; void *sc_ih; struct evcnt sc_intrcnt; }; struct cfattach ei_ca = { sizeof(struct ei_softc), ei_match, ei_attach }; static inline void ei_setpage(struct ei_softc *sc, int page) { bus_space_write_1(sc->sc_ctl_t, sc->sc_ctl_h, EI_PAGE, page); } static inline void ei_cli(struct ei_softc *sc) { bus_space_write_1(sc->sc_ctl_t, sc->sc_ctl_h, EI_CONTROL, EI_CTL_CLI); } static int ei_match(struct device *parent, struct cfdata *cf, void *aux) { struct podulebus_attach_args *pa = aux; return IS_PODULE(pa, MANUFACTURER_ACORN, PODULE_ACORN_ETHER1); } static void ei_attach(struct device *parent, struct device *self, void *aux) { struct podulebus_attach_args *pa = aux; struct ei_softc *sc = (struct ei_softc *)self; int i; char descr[16]; /* Set up bus spaces */ sc->sc_ctl_t = sc->sc_mem_t = pa->pa_fast_t; bus_space_map(pa->pa_fast_t, pa->pa_fast_base, EI_MEMOFF, 0, &sc->sc_ctl_h); bus_space_map(pa->pa_fast_t, pa->pa_fast_base + EI_MEMOFF, EI_PAGESIZE * 2, 0, &sc->sc_mem_h); sc->sc_rom_t = pa->pa_sync_t; bus_space_map(pa->pa_sync_t, pa->pa_sync_base, EI_ROMSIZE, 0, &sc->sc_rom_h); /* Set up callbacks */ sc->sc_ie.hwinit = NULL; sc->sc_ie.intrhook = ei_intrhook; sc->sc_ie.hwreset = ei_hwreset; sc->sc_ie.chan_attn = ei_attn; sc->sc_ie.memcopyin = ei_copyin; sc->sc_ie.memcopyout = ei_copyout; sc->sc_ie.ie_bus_barrier = NULL; sc->sc_ie.ie_bus_read16 = ei_read16; sc->sc_ie.ie_bus_write16 = ei_write16; sc->sc_ie.ie_bus_write24 = ei_write24; sc->sc_ie.do_xmitnopchain = 0; /* Does it listen? */ sc->sc_ie.sc_mediachange = NULL; sc->sc_ie.sc_mediastatus = NULL; sc->sc_ie.bt = sc->sc_mem_t; /* XXX hope it doesn't use them */ sc->sc_ie.bh = sc->sc_mem_h; printf(":"); /* All Ether1s are 64k (I believe) */ sc->sc_ie.sc_msize = EI_MEMSIZE; /* set up pointers to important on-card control structures */ sc->sc_ie.iscp = 0; sc->sc_ie.scb = IE_ISCP_SZ; sc->sc_ie.scp = sc->sc_ie.sc_msize + IE_SCP_ADDR - (1 << 24); sc->sc_ie.buf_area = sc->sc_ie.scb + IE_SCB_SZ; sc->sc_ie.buf_area_sz = sc->sc_ie.sc_msize - IE_ISCP_SZ - IE_SCB_SZ - IE_SCP_SZ; /* Wipe the whole of the card's memory */ for (i = 0; i < EI_NPAGES; i++) { ei_setpage(sc, i); bus_space_set_region_2(sc->sc_mem_t, sc->sc_mem_h, 0, 0,EI_PAGESIZE / 2); } /* set up pointers to key structures */ ei_write24(&sc->sc_ie, IE_SCP_ISCP((u_long)sc->sc_ie.scp), (u_long) sc->sc_ie.iscp); ei_write16(&sc->sc_ie, IE_ISCP_SCB((u_long)sc->sc_ie.iscp), (u_long) sc->sc_ie.scb); ei_write24(&sc->sc_ie, IE_ISCP_BASE((u_long)sc->sc_ie.iscp), (u_long) sc->sc_ie.iscp); /* check if chip answers */ if (i82586_proberam(&sc->sc_ie) == 0) { printf(" memory probe failed\n"); return; } /* Read ROM */ bus_space_read_region_1(sc->sc_rom_t, sc->sc_rom_h, 0, sc->sc_idrom, EI_ROMSIZE); snprintf(descr, 15, "AKA25 iss. %d", sc->sc_idrom[EI_ROM_HWREV]); i82586_attach(&sc->sc_ie, descr, sc->sc_idrom + EI_ROM_EADDR, NULL, 0, 0); evcnt_attach_dynamic(&sc->sc_intrcnt, EVCNT_TYPE_INTR, NULL, self->dv_xname, "intr"); sc->sc_ih = podulebus_irq_establish(pa->pa_ih, IPL_NET, i82586_intr, self, &sc->sc_intrcnt); ei_cli(sc); } static void ei_hwreset(struct ie_softc *sc_ie, int why) { struct ei_softc *sc = (struct ei_softc *)sc_ie; bus_space_write_1(sc->sc_ctl_t, sc->sc_ctl_h, EI_CONTROL, EI_CTL_RST); DELAY(1000); bus_space_write_1(sc->sc_ctl_t, sc->sc_ctl_h, EI_CONTROL, 0); DELAY(1000); ei_cli(sc); } static int ei_intrhook(struct ie_softc *sc_ie, int why) { struct ei_softc *sc = (struct ei_softc *)sc_ie; switch (why) { case INTR_EXIT: case INTR_ACK: ei_cli(sc); break; } return 0; } static void ei_attn(struct ie_softc *sc_ie, int why) { struct ei_softc *sc = (void *)sc_ie; bus_space_write_1(sc->sc_ctl_t, sc->sc_ctl_h, EI_CONTROL, EI_CTL_CA); } /* * Various access functions to allow the MI 82586 driver to get at the * board's memory. All memory accesses must go through these, as * nothing else knows how to manipulate the page register. Note that * all addresses and lengths passed in are in bytes of actual data. * The bus_space functions deal in words, though, so we have to * convert on the way through. */ static void ei_copyin(struct ie_softc *sc_ie, void *dest, int src, size_t size) { struct ei_softc *sc = (struct ei_softc *)sc_ie; int cnt, s, extra_byte; u_int16_t *wptr; #ifdef DIAGNOSTIC if (src % 2 != 0 || !ALIGNED_POINTER(dest, u_int16_t)) panic("%s: unaligned copyin", sc_ie->sc_dev.dv_xname); #endif wptr = dest; extra_byte = size % 2; size -= extra_byte; while (size > 0) { cnt = EI_PAGESIZE - src % EI_PAGESIZE; if (cnt > size) cnt = size; s = splnet(); ei_setpage(sc, ei_atop(src)); /* bus ops are in words */ bus_space_read_region_2(sc->sc_mem_t, sc->sc_mem_h, ei_atopo(src) / 2, wptr, cnt / 2); splx(s); src += cnt; wptr += cnt / 2; size -= cnt; } if (extra_byte) { /* Do we need to be this careful? */ s = splnet(); ei_setpage(sc, ei_atop(src)); *(u_int8_t *)wptr = bus_space_read_2(sc->sc_mem_t, sc->sc_mem_h, ei_atopo(src) / 2) & 0xff; splx(s); } } static void ei_copyout(struct ie_softc *sc_ie, const void *src, int dest, size_t size) { struct ei_softc *sc = (struct ei_softc *)sc_ie; int cnt, s; const u_int16_t *wptr; u_int16_t *bounce = NULL; #ifdef DIAGNOSTIC if (dest % 2 != 0) panic("%s: unaligned copyout", sc_ie->sc_dev.dv_xname); #endif if (!ALIGNED_POINTER(src, u_int16_t)) { MALLOC(bounce, u_int16_t *, size, M_DEVBUF, M_NOWAIT); if (bounce == NULL) panic("%s: no memory to align copyout", sc_ie->sc_dev.dv_xname); memcpy(bounce, src, size); src = bounce; } wptr = src; if (size % 2 != 0) size++; /* This is safe, since the buffer is 16bit aligned */ while (size > 0) { cnt = EI_PAGESIZE - dest % EI_PAGESIZE; if (cnt > size) cnt = size; s = splnet(); ei_setpage(sc, ei_atop(dest)); /* bus ops are in words */ bus_space_write_region_2(sc->sc_mem_t, sc->sc_mem_h, ei_atopo(dest) / 2, wptr, cnt / 2); splx(s); wptr += cnt / 2; dest += cnt; size -= cnt; } if (bounce != NULL) FREE(bounce, M_DEVBUF); } static u_int16_t ei_read16(struct ie_softc *sc_ie, int addr) { struct ei_softc *sc = (struct ei_softc *)sc_ie; int result, s; #ifdef DIAGNOSTIC if (addr % 2 != 0) panic("%s: unaligned read16", sc_ie->sc_dev.dv_xname); #endif s = splnet(); ei_setpage(sc, ei_atop(addr)); result = bus_space_read_2(sc->sc_mem_t, sc->sc_mem_h, ei_atopo(addr) / 2); splx(s); return result; } static void ei_write16(struct ie_softc *sc_ie, int addr, u_int16_t value) { struct ei_softc *sc = (struct ei_softc *)sc_ie; int s; #ifdef DIAGNOSTIC if (addr % 2 != 0) panic("%s: unaligned write16", sc_ie->sc_dev.dv_xname); #endif s = splnet(); ei_setpage(sc, ei_atop(addr)); bus_space_write_2(sc->sc_mem_t, sc->sc_mem_h, ei_atopo(addr) / 2, value); splx(s); } static void ei_write24(struct ie_softc *sc_ie, int addr, int value) { int s; #ifdef DIAGNOSTIC if (addr % 2 != 0) panic("%s: unaligned write24", sc_ie->sc_dev.dv_xname); #endif s = splnet(); ei_write16(sc_ie, addr, value & 0xffff); ei_write16(sc_ie, addr + 2, (value >> 16) & 0xff); splx(s); }