/* $NetBSD: simide.c,v 1.10 1998/12/03 18:24:30 bouyer Exp $ */ /* * Copyright (c) 1997-1998 Mark Brinicombe * Copyright (c) 1997-1998 Causality Limited * * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Mark Brinicombe * for the NetBSD Project. * 4. 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. * * Card driver and probe and attach functions to use generic IDE driver * for the Simtec IDE podule */ /* * Thanks to Gareth Simpson, Simtec Electronics for providing * the hardware information */ #include #include #include #include #include #include #include #include #include #include #include #include #include /* * Simtec IDE podule device. * * This probes and attaches the top level Simtec IDE device to the podulebus. * It then configures any children of the Simtec IDE device. * The attach args specify whether it is configuring the primary or * secondary channel. * The children are expected to be wdc devices using simide attachments. */ /* * Simtec IDE card softc structure. * * Contains the device node, podule information and global information * required by the driver such as the card version and the interrupt mask. */ struct simide_softc { struct wdc_softc sc_wdcdev; /* common wdc definitions */ struct channel_softc *wdc_chanarray[2]; /* channels definition */ podule_t *sc_podule; /* Our podule info */ int sc_podule_number; /* Our podule number */ int sc_ctl_reg; /* Global ctl reg */ int sc_version; /* Card version */ bus_space_tag_t sc_ctliot; /* Bus tag */ bus_space_handle_t sc_ctlioh; /* control handle */ struct bus_space sc_tag; /* custom tag */ struct simide_channel { struct channel_softc wdc_channel; /* generic part */ irqhandler_t sc_ih; /* interrupt handler */ int sc_irqmask; /* IRQ mask for this channel */ } simide_channels[2]; }; int simide_probe __P((struct device *, struct cfdata *, void *)); void simide_attach __P((struct device *, struct device *, void *)); void simide_shutdown __P((void *arg)); int simide_intr __P((void *arg)); struct cfattach simide_ca = { sizeof(struct simide_softc), simide_probe, simide_attach }; /* * Define prototypes for custom bus space functions. */ bs_rm_2_proto(simide); bs_wm_2_proto(simide); /* * Create an array of address structures. These define the addresses and * masks needed for the different channels. * * index = channel */ struct { u_int drive_registers; u_int aux_register; u_int irq_mask; } simide_info[] = { { PRIMARY_DRIVE_REGISTERS_POFFSET, PRIMARY_AUX_REGISTER_POFFSET, CONTROL_PRIMARY_IRQ }, { SECONDARY_DRIVE_REGISTERS_POFFSET, SECONDARY_AUX_REGISTER_POFFSET, CONTROL_SECONDARY_IRQ } }; /* * Card probe function * * Just match the manufacturer and podule ID's */ int simide_probe(parent, cf, aux) struct device *parent; struct cfdata *cf; void *aux; { struct podule_attach_args *pa = (void *)aux; if (matchpodule(pa, MANUFACTURER_SIMTEC, PODULE_SIMTEC_IDE, -1) == 0) return(0); return(1); } /* * Card attach function * * Identify the card version and configure any children. * Install a shutdown handler to kill interrupts on shutdown */ void simide_attach(parent, self, aux) struct device *parent, *self; void *aux; { struct simide_softc *sc = (void *)self; struct podule_attach_args *pa = (void *)aux; int status; u_int iobase; int channel; struct simide_channel *scp; struct channel_softc *cp; irqhandler_t *ihp; /* Note the podule number and validate */ if (pa->pa_podule_number == -1) panic("Podule has disappeared !"); sc->sc_podule_number = pa->pa_podule_number; sc->sc_podule = pa->pa_podule; podules[sc->sc_podule_number].attached = 1; /* * Ok we need our own bus tag as the register spacing * is not the default. * * For the podulebus the bus tag cookie is the shift * to apply to registers * So duplicate the bus space tag and change the * cookie. * * Also while we are at it replace the default * read/write mulitple short functions with * optimised versions */ sc->sc_tag = *pa->pa_iot; sc->sc_tag.bs_cookie = (void *) DRIVE_REGISTER_SPACING_SHIFT; sc->sc_tag.bs_rm_2 = simide_bs_rm_2; sc->sc_tag.bs_wm_2 = simide_bs_wm_2; sc->sc_ctliot = pa->pa_iot; /* Obtain bus space handles for all the control registers */ if (bus_space_map(sc->sc_ctliot, pa->pa_podule->mod_base + CONTROL_REGISTERS_POFFSET, CONTROL_REGISTER_SPACE, 0, &sc->sc_ctlioh)) panic("%s: Cannot map control registers\n", self->dv_xname); /* Install a clean up handler to make sure IRQ's are disabled */ if (shutdownhook_establish(simide_shutdown, (void *)sc) == NULL) panic("%s: Cannot install shutdown handler", self->dv_xname); /* Set the interrupt info for this podule */ sc->sc_podule->irq_addr = pa->pa_podule->mod_base + CONTROL_REGISTERS_POFFSET + (CONTROL_REGISTER_OFFSET << 2); sc->sc_podule->irq_mask = STATUS_IRQ; sc->sc_ctl_reg = 0; status = bus_space_read_1(sc->sc_ctliot, sc->sc_ctlioh, STATUS_REGISTER_OFFSET); /* If any of the bits in STATUS_FAULT are zero then we have a fault. */ if ((status & STATUS_FAULT) != STATUS_FAULT) printf(" card/cable fault (%02x) -", status); if (!(status & STATUS_RESET)) printf(" (reset)"); if (!(status & STATUS_ADDR_TEST)) printf(" (addr)"); if (!(status & STATUS_CS_TEST)) printf(" (cs)"); if (!(status & STATUS_RW_TEST)) printf(" (rw)"); printf("\n"); /* Perhaps we should just abort at this point. */ /* if ((status & STATUS_FAULT) != STATUS_FAULT) return;*/ /* * Enable IDE, Obey IORDY and disabled slow mode */ sc->sc_ctl_reg |= CONTROL_IDE_ENABLE | CONTROL_IORDY | CONTROL_SLOW_MODE_OFF; bus_space_write_1(sc->sc_ctliot, sc->sc_ctlioh, CONTROL_REGISTER_OFFSET, sc->sc_ctl_reg); /* Fill in wdc and channel infos */ sc->sc_wdcdev.cap |= WDC_CAPABILITY_DATA16; sc->sc_wdcdev.PIO_cap = 0; sc->sc_wdcdev.channels = sc->wdc_chanarray; sc->sc_wdcdev.nchannels = 2; for (channel = 0 ; channel < 2; channel++) { scp = &sc->simide_channels[channel]; sc->wdc_chanarray[channel] = &scp->wdc_channel; cp = &scp->wdc_channel; cp->channel = channel; cp->wdc = &sc->sc_wdcdev; cp->ch_queue = malloc(sizeof(struct channel_queue), M_DEVBUF, M_NOWAIT); if (cp->ch_queue == NULL) { printf("%s %s channel: can't allocate memory for " "command queue", self->dv_xname, (channel == 0) ? "primary" : "secondary"); continue; } cp->cmd_iot = cp->ctl_iot = &sc->sc_tag; iobase = pa->pa_podule->mod_base; if (bus_space_map(cp->cmd_iot, iobase + simide_info[channel].drive_registers, DRIVE_REGISTERS_SPACE, 0, &cp->cmd_ioh)) continue; if (bus_space_map(cp->ctl_iot, iobase + simide_info[channel].aux_register, 4, 0, &cp->ctl_ioh)) { bus_space_unmap(cp->cmd_iot, cp->cmd_ioh, DRIVE_REGISTERS_SPACE); continue; } /* Disable interrupts and clear any pending interrupts */ scp->sc_irqmask = simide_info[channel].irq_mask; sc->sc_ctl_reg &= ~scp->sc_irqmask; bus_space_write_1(sc->sc_ctliot, sc->sc_ctlioh, CONTROL_REGISTER_OFFSET, sc->sc_ctl_reg); wdcattach(cp); ihp = &scp->sc_ih; ihp->ih_func = simide_intr; ihp->ih_arg = scp; ihp->ih_level = IPL_BIO; ihp->ih_name = "simide"; ihp->ih_maskaddr = pa->pa_podule->irq_addr; ihp->ih_maskbits = scp->sc_irqmask; if (irq_claim(sc->sc_podule->interrupt, ihp)) panic("%s: Cannot claim interrupt %d\n", self->dv_xname, sc->sc_podule->interrupt); /* clear any pending interrupts and enable interrupts */ sc->sc_ctl_reg |= scp->sc_irqmask; bus_space_write_1(sc->sc_ctliot, sc->sc_ctlioh, CONTROL_REGISTER_OFFSET, sc->sc_ctl_reg); } } /* * Card shutdown function * * Called via do_shutdown_hooks() during kernel shutdown. * Clear the cards's interrupt mask to stop any podule interrupts. */ void simide_shutdown(arg) void *arg; { struct simide_softc *sc = arg; sc->sc_ctl_reg &= (CONTROL_PRIMARY_IRQ | CONTROL_SECONDARY_IRQ); /* Disable card interrupts */ bus_space_write_1(sc->sc_ctliot, sc->sc_ctlioh, CONTROL_REGISTER_OFFSET, sc->sc_ctl_reg); } /* * Podule interrupt handler * * If the interrupt was from our card pass it on to the wdc interrupt handler */ int simide_intr(arg) void *arg; { struct simide_channel *scp = arg; irqhandler_t *ihp = &scp->sc_ih; volatile u_char *intraddr = (volatile u_char *)ihp->ih_maskaddr; /* XXX - not bus space yet - should really be handled by podulebus */ if ((*intraddr) & ihp->ih_maskbits) wdcintr(&scp->wdc_channel); return(0); }