1 /* $NetBSD: tft_plb.c,v 1.3 2009/10/25 09:32:25 ahoka Exp $ */ 2 3 /* 4 * Copyright (c) 2006 Jachym Holecek 5 * All rights reserved. 6 * 7 * Written for DFC Design, s.r.o. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: tft_plb.c,v 1.3 2009/10/25 09:32:25 ahoka Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/mbuf.h> 38 #include <sys/kernel.h> 39 #include <sys/socket.h> 40 #include <sys/ioctl.h> 41 #include <sys/device.h> 42 #include <sys/queue.h> 43 44 #include <uvm/uvm_extern.h> 45 46 #include <machine/bus.h> 47 48 #include <dev/wscons/wsdisplayvar.h> 49 #include <dev/wscons/wsconsio.h> 50 #include <dev/rasops/rasops.h> 51 #include <dev/wscons/wsdisplay_vconsvar.h> 52 53 #include <evbppc/virtex/dev/xcvbusvar.h> 54 #include <evbppc/virtex/dev/tftreg.h> 55 #include <evbppc/virtex/dev/tftvar.h> 56 57 58 struct plb_tft_softc { 59 struct tft_softc psc_sc; 60 61 bus_dma_tag_t psc_dmat; 62 bus_dmamap_t psc_dmap; /* for psc_sc.sc_image */ 63 bus_dma_segment_t psc_seg; 64 65 void *sc_sdhook; /* stop DMA */ 66 }; 67 68 static void plb_tft_attach(struct device *, struct device *, void *); 69 static paddr_t plb_tft_mmap(void *, void *, off_t, int); 70 71 CFATTACH_DECL(plb_tft, sizeof(struct plb_tft_softc), 72 xcvbus_child_match, plb_tft_attach, NULL, NULL); 73 74 75 /* Patched by tft_attach(), may be shared by all instances. */ 76 static struct wsdisplay_accessops plb_tft_accessops = { 77 .mmap = plb_tft_mmap, 78 }; 79 80 81 /* 82 * Generic device. 83 */ 84 static void 85 plb_tft_attach(struct device *parent, struct device *self, void *aux) 86 { 87 struct xcvbus_attach_args *vaa = aux; 88 struct plb_tft_softc *psc = device_private(self); 89 struct tft_softc *sc = &psc->psc_sc; 90 int nseg, error; 91 92 psc->psc_dmat = vaa->vaa_dmat; 93 sc->sc_iot = vaa->vaa_iot; 94 95 printf(": PLB_TFT\n"); 96 97 if ((error = bus_space_map(sc->sc_iot, vaa->vaa_addr, TFT_SIZE, 98 0, &sc->sc_ioh)) != 0) { 99 printf("%s: could not map device registers\n", 100 device_xname(self)); 101 goto fail_0; 102 } 103 104 /* Fill in resolution, depth, size. */ 105 tft_mode(self); 106 107 /* Allocate and map framebuffer control data. */ 108 if ((error = bus_dmamem_alloc(psc->psc_dmat, sc->sc_size, ADDR_ALIGN, 109 0, &psc->psc_seg, 1, &nseg, 0)) != 0) { 110 printf("%s: could not allocate framebuffer\n", 111 device_xname(self)); 112 goto fail_1; 113 } 114 if ((error = bus_dmamem_map(psc->psc_dmat, &psc->psc_seg, nseg, 115 sc->sc_size, &sc->sc_image, BUS_DMA_COHERENT)) != 0) { 116 printf("%s: could not map framebuffer\n", 117 device_xname(self)); 118 goto fail_2; 119 } 120 if ((error = bus_dmamap_create(psc->psc_dmat, sc->sc_size, 1, 121 sc->sc_size, 0, 0, &psc->psc_dmap)) != 0) { 122 printf("%s: could not create framebuffer DMA map\n", 123 device_xname(self)); 124 goto fail_3; 125 } 126 if ((error = bus_dmamap_load(psc->psc_dmat, psc->psc_dmap, 127 sc->sc_image, sc->sc_size, NULL, 0)) != 0) { 128 printf("%s: could not load framebuffer DMA map\n", 129 device_xname(self)); 130 goto fail_4; 131 } 132 /* XXX hack, we linear map whole RAM and we have single segment */ 133 /* sc->sc_image = (void *)psc->psc_dmap->dm_segs[0].ds_addr; */ 134 /* XXX hack, use predefined base addr */ 135 sc->sc_image = (void *)(uintptr_t)0x3c00000; 136 137 /* XXX forget the hack above, use "virtex-tft-framebuffer-base" prop */ 138 139 tft_attach(self, &plb_tft_accessops); 140 141 printf("%s: video memory pa 0x%08x\n", device_xname(self), 142 (uint32_t)psc->psc_dmap->dm_segs[0].ds_addr); 143 144 #if 0 145 /* XXX powerpc bus_dma doesn't support COHERENT. */ 146 bus_dmamap_sync(psc->psc_dmat, psc->psc_dmap, 0, 147 sc->sc_size, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 148 #endif 149 150 bus_space_write_4(sc->sc_iot, sc->sc_ioh, TFT_CTRL, CTRL_RESET); 151 bus_space_write_4(sc->sc_iot, sc->sc_ioh, TFT_CTRL, CTRL_ENABLE); 152 153 #if 0 154 /* XXX how do we change framebuffer base? */ 155 bus_space_write_4(sc->sc_iot, sc->sc_ioh, TFT_CTRL, CTRL_RESET); 156 bus_space_write_4(sc->sc_iot, sc->sc_ioh, TFT_CTRL, CTRL_ENABLE); 157 bus_space_write_4(sc->sc_iot, sc->sc_ioh, TFT_ADDR, 158 ADDR_MAKE(psc->psc_dmap->dm_segs[0].ds_addr)); 159 #endif 160 161 return ; 162 163 fail_4: 164 bus_dmamap_destroy(psc->psc_dmat, psc->psc_dmap); 165 fail_3: 166 bus_dmamem_unmap(psc->psc_dmat, sc->sc_image, sc->sc_size); 167 fail_2: 168 bus_dmamem_free(psc->psc_dmat, &psc->psc_seg, nseg); 169 fail_1: 170 bus_space_unmap(sc->sc_iot, sc->sc_ioh, TFT_SIZE); 171 fail_0: 172 printf("%s: error %d\n", device_xname(self), error); 173 } 174 175 static paddr_t 176 plb_tft_mmap(void *arg, void *scr, off_t offs, int prot) 177 { 178 struct vcons_data *vc = arg; 179 struct plb_tft_softc *psc = vc->cookie; 180 paddr_t pa = -1; 181 182 #if 0 /* XXX hack */ 183 if (offs < psc->psc_sc.sc_size) 184 pa = bus_dmamem_mmap(psc->psc_dmat, &psc->psc_seg, 1, 185 offs, prot, BUS_DMA_WAITOK | BUS_DMA_COHERENT); 186 #endif 187 if (offs < psc->psc_sc.sc_size) 188 pa = (paddr_t)(intptr_t)psc->psc_sc.sc_image + offs; 189 190 return (pa); 191 } 192