1 /*- 2 * Copyright (c) 2010, 2011 The NetBSD Foundation, Inc. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to The NetBSD Foundation 6 * by Matt Thomas of 3am Software Foundry. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 * POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include "locators.h" 31 32 #include <sys/cdefs.h> 33 34 __KERNEL_RCSID(0, "$NetBSD: wdc_obio.c,v 1.1 2011/01/18 01:10:25 matt Exp $"); 35 36 #include <sys/param.h> 37 #include <sys/cpu.h> 38 #include <sys/device.h> 39 #include <sys/tty.h> 40 41 #include "ioconf.h" 42 43 #include <sys/intr.h> 44 #include <sys/bus.h> 45 46 #include <powerpc/booke/cpuvar.h> 47 48 #include <dev/ic/wdcreg.h> 49 #include <dev/ata/atavar.h> 50 #include <dev/ic/wdcvar.h> 51 52 struct wdc_obio_softc { 53 struct wdc_softc sc_wdcdev; 54 struct ata_channel *wdc_chanlist[1]; 55 struct ata_channel ata_channel; 56 struct ata_queue wdc_chqueue; 57 struct wdc_regs wdc_regs; 58 void *sc_ih; 59 }; 60 61 #define WDC_OBIO_AUXREG_OFFSET (WDC_NREG + 6) 62 63 static int wdc_obio_match(device_t, cfdata_t, void *); 64 static void wdc_obio_attach(device_t, device_t, void *); 65 66 CFATTACH_DECL_NEW(wdc_obio, sizeof(struct wdc_obio_softc), 67 wdc_obio_match, wdc_obio_attach, NULL, NULL); 68 69 static bool 70 wdc_obio_initregmap(struct wdc_regs *wdr, bus_space_tag_t bst, 71 bus_addr_t addr, bus_size_t size) 72 { 73 int error; 74 75 wdr->cmd_iot = bst; 76 wdr->ctl_iot = bst; 77 78 error = bus_space_map(wdr->cmd_iot, addr, size, 0, &wdr->cmd_baseioh); 79 if (error) { 80 wdr->cmd_baseioh = 0; 81 return false; 82 } 83 84 for (u_int i = 0; i < WDC_NREG; i++) { 85 if (bus_space_subregion(wdr->cmd_iot, wdr->cmd_baseioh, 86 i, (i == 0) ? 2 : 1, &wdr->cmd_iohs[i])) { 87 return false; 88 } 89 } 90 91 if (bus_space_subregion(wdr->ctl_iot, wdr->cmd_baseioh, 92 WDC_OBIO_AUXREG_OFFSET, 1, &wdr->ctl_ioh)) { 93 return false; 94 } 95 96 return true; 97 } 98 99 static int 100 wdc_obio_match(device_t parent, cfdata_t cf, void *aux) 101 { 102 struct generic_attach_args * const ga = aux; 103 bus_size_t size = ga->ga_size; 104 struct ata_channel ch; 105 struct wdc_softc wdc; 106 struct wdc_regs wdr; 107 struct device dev; 108 int rv = 0; 109 110 if (ga->ga_addr == OBIOCF_ADDR_DEFAULT) 111 return 0; 112 if (size == OBIOCF_SIZE_DEFAULT || size > PAGE_SIZE) 113 size = 2 * WDC_NREG; 114 115 /* 116 * We need to see if a CF is attached in True-IDE mode 117 */ 118 memset(&dev, 0, sizeof(dev)); 119 memset(&wdc, 0, sizeof(wdc)); 120 memset(&ch, 0, sizeof(ch)); 121 memset(&wdr, 0, sizeof(wdr)); 122 123 dev.dv_xname[0] = '?'; 124 wdc.sc_atac.atac_dev = &dev; 125 ch.ch_atac = &wdc.sc_atac; 126 wdc.regs = &wdr; 127 128 if (wdc_obio_initregmap(&wdr, ga->ga_bst, ga->ga_addr, size)) { 129 wdc_init_shadow_regs(&ch); 130 rv = wdcprobe(&ch); 131 bus_space_unmap(wdr.cmd_iot, wdr.cmd_baseioh, size); 132 } 133 134 return rv; 135 } 136 137 static void 138 wdc_obio_attach(device_t parent, device_t self, void *aux) 139 { 140 struct wdc_obio_softc *sc = device_private(self); 141 struct wdc_regs * const wdr = &sc->wdc_regs; 142 struct generic_attach_args * const ga = aux; 143 bus_size_t size = ga->ga_size; 144 145 if (size == OBIOCF_SIZE_DEFAULT || size > PAGE_SIZE) 146 size = 2 * WDC_NREG; 147 148 sc->sc_wdcdev.sc_atac.atac_dev = self; 149 sc->sc_wdcdev.regs = wdr; 150 if (!wdc_obio_initregmap(wdr, ga->ga_bst, ga->ga_addr, size)) { 151 aprint_error(": couldn't map registers\n"); 152 return; 153 } 154 155 //sc->sc_wdcdev.cap |= WDC_CAPABILITY_NO_EXTRA_RESETS; 156 sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_DATA16; 157 158 sc->sc_wdcdev.sc_atac.atac_pio_cap = 0; 159 sc->wdc_chanlist[0] = &sc->ata_channel; 160 sc->sc_wdcdev.sc_atac.atac_channels = sc->wdc_chanlist; 161 sc->sc_wdcdev.sc_atac.atac_nchannels = 1; 162 sc->ata_channel.ch_channel = 0; 163 sc->ata_channel.ch_atac = &sc->sc_wdcdev.sc_atac; 164 sc->ata_channel.ch_queue = &sc->wdc_chqueue; 165 sc->ata_channel.ch_ndrive = 2; 166 167 wdc_init_shadow_regs(&sc->ata_channel); 168 169 170 /* 171 * The interrupt line is controlled by a jumper. We can't detect 172 * this, except by allowing a request to time out, so assume that 173 * if the config file hasn't specified the IRQ, then the jumper isn't 174 * fitted. 175 */ 176 if (ga->ga_irq != OBIOCF_IRQ_DEFAULT) { 177 sc->sc_ih = intr_establish(ga->ga_irq, IPL_BIO, IST_EDGE, 178 wdcintr, &sc->ata_channel); 179 aprint_normal(": interrupting at irq %d\n", ga->ga_irq); 180 } else { 181 sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_NOIRQ; 182 aprint_normal(": using polled I/O\n"); 183 } 184 185 wdcattach(&sc->ata_channel); 186 } 187