tft_ll.c revision 1.3
1 /* $NetBSD: tft_ll.c,v 1.3 2011/06/18 06:44:27 matt 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_ll.c,v 1.3 2011/06/18 06:44:27 matt 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 /* XXX needed? */ 49 #include <dev/wscons/wsdisplayvar.h> 50 #include <dev/wscons/wsconsio.h> 51 #include <dev/rasops/rasops.h> 52 #include <dev/wscons/wsdisplay_vconsvar.h> 53 54 #include <evbppc/virtex/dev/xcvbusvar.h> 55 #include <evbppc/virtex/dev/cdmacreg.h> 56 #include <evbppc/virtex/dev/tftreg.h> 57 #include <evbppc/virtex/dev/tftvar.h> 58 59 60 struct ll_tft_control { 61 struct cdmac_descr cd_dsc; 62 u_char cd_img[]; 63 } __packed; 64 65 struct ll_tft_softc { 66 struct tft_softc lsc_sc; 67 68 bus_space_tag_t lsc_dma_iot; 69 bus_space_handle_t lsc_dma_ioh; 70 71 bus_dma_tag_t lsc_dmat; 72 bus_dmamap_t lsc_dmap; 73 74 struct ll_tft_control *lsc_cd; 75 bus_dma_segment_t lsc_seg; 76 }; 77 78 static void ll_tft_attach(device_t, device_t, void *); 79 static paddr_t ll_tft_mmap(void *, void *, off_t, int); 80 static void ll_tft_shutdown(void *); 81 82 CFATTACH_DECL_NEW(ll_tft, sizeof(struct ll_tft_softc), 83 xcvbus_child_match, ll_tft_attach, NULL, NULL); 84 85 86 static struct wsdisplay_accessops ll_tft_accessops = { 87 .mmap = ll_tft_mmap, 88 }; 89 90 91 static void 92 ll_tft_attach(device_t parent, device_t self, void *aux) 93 { 94 struct xcvbus_attach_args *vaa = aux; 95 struct ll_dmac *tx = vaa->vaa_tx_dmac; 96 struct ll_tft_softc *lsc = device_private(self); 97 struct tft_softc *sc = &lsc->lsc_sc; 98 int nseg, error; 99 100 KASSERT(tx); 101 102 lsc->lsc_dma_iot = tx->dmac_iot; 103 lsc->lsc_dmat = vaa->vaa_dmat; 104 sc->sc_iot = vaa->vaa_iot; 105 sc->sc_dev = self; 106 107 aprint_normal(": LL_TFT\n"); 108 109 if ((error = bus_space_map(sc->sc_iot, vaa->vaa_addr, TFT_SIZE, 110 0, &sc->sc_ioh)) != 0) { 111 aprint_error_dev(self, "could not map device registers\n"); 112 goto fail_0; 113 } 114 if ((error = bus_space_map(lsc->lsc_dma_iot, tx->dmac_ctrl_addr, 115 CDMAC_CTRL_SIZE, 0, &lsc->lsc_dma_ioh)) != 0) { 116 aprint_error_dev(self, "could not map dmac registers\n"); 117 goto fail_1; 118 } 119 120 /* Fill in resolution, depth, size. */ 121 tft_mode(sc->sc_dev); 122 123 /* Allocate and map framebuffer control data. */ 124 if ((error = bus_dmamem_alloc(lsc->lsc_dmat, 125 sizeof(struct ll_tft_control) + sc->sc_size, 8, 0, 126 &lsc->lsc_seg, 1, &nseg, 0)) != 0) { 127 aprint_error_dev(self, "could not allocate framebuffer\n"); 128 goto fail_2; 129 } 130 if ((error = bus_dmamem_map(lsc->lsc_dmat, &lsc->lsc_seg, nseg, 131 sizeof(struct ll_tft_control) + sc->sc_size, 132 (void **)&lsc->lsc_cd, BUS_DMA_COHERENT)) != 0) { 133 aprint_error_dev(self, "could not map framebuffer\n"); 134 goto fail_3; 135 } 136 if ((error = bus_dmamap_create(lsc->lsc_dmat, 137 sizeof(struct ll_tft_control) + sc->sc_size, 1, 138 sizeof(struct ll_tft_control) + sc->sc_size, 0, 0, 139 &lsc->lsc_dmap)) != 0) { 140 aprint_error_dev(self, "could not create framebuffer DMA map\n"); 141 goto fail_4; 142 } 143 if ((error = bus_dmamap_load(lsc->lsc_dmat, lsc->lsc_dmap, lsc->lsc_cd, 144 sizeof(struct ll_tft_control) + sc->sc_size, NULL, 0)) != 0) { 145 aprint_error_dev(self, "could not load framebuffer DMA map\n"); 146 goto fail_5; 147 } 148 149 /* Clear screen, setup descriptor. */ 150 memset(lsc->lsc_cd, 0x00, sizeof(struct ll_tft_control)); 151 sc->sc_image = lsc->lsc_cd->cd_img; 152 153 lsc->lsc_cd->cd_dsc.desc_next = lsc->lsc_dmap->dm_segs[0].ds_addr; 154 lsc->lsc_cd->cd_dsc.desc_addr = lsc->lsc_dmap->dm_segs[0].ds_addr + 155 offsetof(struct ll_tft_control, cd_img); 156 lsc->lsc_cd->cd_dsc.desc_size = sc->sc_size; 157 lsc->lsc_cd->cd_dsc.desc_stat = CDMAC_STAT_SOP; 158 159 bus_dmamap_sync(lsc->lsc_dmat, lsc->lsc_dmap, 0, 160 sizeof(struct ll_tft_control) + sc->sc_size, 161 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 162 163 sc->sc_sdhook = shutdownhook_establish(ll_tft_shutdown, sc); 164 if (sc->sc_sdhook == NULL) 165 aprint_error_dev(self, 166 "WARNING: unable to establish shutdown hook\n"); 167 168 tft_attach(self, &ll_tft_accessops); 169 170 aprint_normal_dev(self, "video memory pa 0x%08x\n", 171 (uint32_t)lsc->lsc_cd->cd_dsc.desc_addr); 172 173 /* Timing sensitive... */ 174 bus_space_write_4(sc->sc_iot, sc->sc_ioh, TFT_CTRL, CTRL_RESET); 175 bus_space_write_4(sc->sc_iot, sc->sc_ioh, TFT_CTRL, CTRL_ENABLE); 176 bus_space_write_4(lsc->lsc_dma_iot, lsc->lsc_dma_ioh, CDMAC_CURDESC, 177 lsc->lsc_dmap->dm_segs[0].ds_addr); 178 179 return ; 180 181 fail_5: 182 bus_dmamap_destroy(lsc->lsc_dmat, lsc->lsc_dmap); 183 fail_4: 184 bus_dmamem_unmap(lsc->lsc_dmat, (void *)lsc->lsc_cd, 185 sizeof(struct ll_tft_control) + sc->sc_size); 186 fail_3: 187 bus_dmamem_free(lsc->lsc_dmat, &lsc->lsc_seg, nseg); 188 fail_2: 189 bus_space_unmap(lsc->lsc_dma_iot, lsc->lsc_dma_ioh, CDMAC_CTRL_SIZE); 190 fail_1: 191 bus_space_unmap(sc->sc_iot, sc->sc_ioh, TFT_SIZE); 192 fail_0: 193 aprint_error_dev(self, "error %d\n", error); 194 } 195 196 static paddr_t 197 ll_tft_mmap(void *arg, void *scr, off_t offs, int prot) 198 { 199 struct ll_tft_softc *lsc = arg; 200 paddr_t pa; 201 202 if (offs < lsc->lsc_sc.sc_size) { 203 pa = bus_dmamem_mmap(lsc->lsc_dmat, &lsc->lsc_seg, 1, 204 offs + offsetof(struct ll_tft_control, cd_img), 205 prot, BUS_DMA_WAITOK | BUS_DMA_COHERENT); 206 207 return (pa); 208 } 209 210 return (-1); 211 } 212 213 static void 214 ll_tft_shutdown(void *arg) 215 { 216 struct ll_tft_softc *lsc = arg; 217 218 bus_space_write_4(lsc->lsc_dma_iot, lsc->lsc_dma_ioh, 0, 219 CDMAC_STAT_RESET); 220 221 tft_shutdown(&lsc->lsc_sc); 222 } 223
Indexes created Fri Sep 26 08:10:20 GMT 2025