/* $NetBSD: tft_ll.c,v 1.4 2011/07/01 19:03:50 dyoung Exp $ */ /* * Copyright (c) 2006 Jachym Holecek * All rights reserved. * * Written for DFC Design, s.r.o. * * 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. * * 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. */ #include __KERNEL_RCSID(0, "$NetBSD: tft_ll.c,v 1.4 2011/07/01 19:03:50 dyoung Exp $"); #include #include #include #include #include #include #include #include #include #include /* XXX needed? */ #include #include #include #include #include #include #include #include struct ll_tft_control { struct cdmac_descr cd_dsc; u_char cd_img[]; } __packed; struct ll_tft_softc { struct tft_softc lsc_sc; bus_space_tag_t lsc_dma_iot; bus_space_handle_t lsc_dma_ioh; bus_dma_tag_t lsc_dmat; bus_dmamap_t lsc_dmap; struct ll_tft_control *lsc_cd; bus_dma_segment_t lsc_seg; }; static void ll_tft_attach(device_t, device_t, void *); static paddr_t ll_tft_mmap(void *, void *, off_t, int); static void ll_tft_shutdown(void *); CFATTACH_DECL_NEW(ll_tft, sizeof(struct ll_tft_softc), xcvbus_child_match, ll_tft_attach, NULL, NULL); static struct wsdisplay_accessops ll_tft_accessops = { .mmap = ll_tft_mmap, }; static void ll_tft_attach(device_t parent, device_t self, void *aux) { struct xcvbus_attach_args *vaa = aux; struct ll_dmac *tx = vaa->vaa_tx_dmac; struct ll_tft_softc *lsc = device_private(self); struct tft_softc *sc = &lsc->lsc_sc; int nseg, error; KASSERT(tx); lsc->lsc_dma_iot = tx->dmac_iot; lsc->lsc_dmat = vaa->vaa_dmat; sc->sc_iot = vaa->vaa_iot; sc->sc_dev = self; aprint_normal(": LL_TFT\n"); if ((error = bus_space_map(sc->sc_iot, vaa->vaa_addr, TFT_SIZE, 0, &sc->sc_ioh)) != 0) { aprint_error_dev(self, "could not map device registers\n"); goto fail_0; } if ((error = bus_space_map(lsc->lsc_dma_iot, tx->dmac_ctrl_addr, CDMAC_CTRL_SIZE, 0, &lsc->lsc_dma_ioh)) != 0) { aprint_error_dev(self, "could not map dmac registers\n"); goto fail_1; } /* Fill in resolution, depth, size. */ tft_mode(sc->sc_dev); /* Allocate and map framebuffer control data. */ if ((error = bus_dmamem_alloc(lsc->lsc_dmat, sizeof(struct ll_tft_control) + sc->sc_size, 8, 0, &lsc->lsc_seg, 1, &nseg, 0)) != 0) { aprint_error_dev(self, "could not allocate framebuffer\n"); goto fail_2; } if ((error = bus_dmamem_map(lsc->lsc_dmat, &lsc->lsc_seg, nseg, sizeof(struct ll_tft_control) + sc->sc_size, (void **)&lsc->lsc_cd, BUS_DMA_COHERENT)) != 0) { aprint_error_dev(self, "could not map framebuffer\n"); goto fail_3; } if ((error = bus_dmamap_create(lsc->lsc_dmat, sizeof(struct ll_tft_control) + sc->sc_size, 1, sizeof(struct ll_tft_control) + sc->sc_size, 0, 0, &lsc->lsc_dmap)) != 0) { aprint_error_dev(self, "could not create framebuffer DMA map\n"); goto fail_4; } if ((error = bus_dmamap_load(lsc->lsc_dmat, lsc->lsc_dmap, lsc->lsc_cd, sizeof(struct ll_tft_control) + sc->sc_size, NULL, 0)) != 0) { aprint_error_dev(self, "could not load framebuffer DMA map\n"); goto fail_5; } /* Clear screen, setup descriptor. */ memset(lsc->lsc_cd, 0x00, sizeof(struct ll_tft_control)); sc->sc_image = lsc->lsc_cd->cd_img; lsc->lsc_cd->cd_dsc.desc_next = lsc->lsc_dmap->dm_segs[0].ds_addr; lsc->lsc_cd->cd_dsc.desc_addr = lsc->lsc_dmap->dm_segs[0].ds_addr + offsetof(struct ll_tft_control, cd_img); lsc->lsc_cd->cd_dsc.desc_size = sc->sc_size; lsc->lsc_cd->cd_dsc.desc_stat = CDMAC_STAT_SOP; bus_dmamap_sync(lsc->lsc_dmat, lsc->lsc_dmap, 0, sizeof(struct ll_tft_control) + sc->sc_size, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); sc->sc_sdhook = shutdownhook_establish(ll_tft_shutdown, sc); if (sc->sc_sdhook == NULL) aprint_error_dev(self, "WARNING: unable to establish shutdown hook\n"); tft_attach(self, &ll_tft_accessops); aprint_normal_dev(self, "video memory pa 0x%08x\n", (uint32_t)lsc->lsc_cd->cd_dsc.desc_addr); /* Timing sensitive... */ bus_space_write_4(sc->sc_iot, sc->sc_ioh, TFT_CTRL, CTRL_RESET); bus_space_write_4(sc->sc_iot, sc->sc_ioh, TFT_CTRL, CTRL_ENABLE); bus_space_write_4(lsc->lsc_dma_iot, lsc->lsc_dma_ioh, CDMAC_CURDESC, lsc->lsc_dmap->dm_segs[0].ds_addr); return ; fail_5: bus_dmamap_destroy(lsc->lsc_dmat, lsc->lsc_dmap); fail_4: bus_dmamem_unmap(lsc->lsc_dmat, (void *)lsc->lsc_cd, sizeof(struct ll_tft_control) + sc->sc_size); fail_3: bus_dmamem_free(lsc->lsc_dmat, &lsc->lsc_seg, nseg); fail_2: bus_space_unmap(lsc->lsc_dma_iot, lsc->lsc_dma_ioh, CDMAC_CTRL_SIZE); fail_1: bus_space_unmap(sc->sc_iot, sc->sc_ioh, TFT_SIZE); fail_0: aprint_error_dev(self, "error %d\n", error); } static paddr_t ll_tft_mmap(void *arg, void *scr, off_t offs, int prot) { struct ll_tft_softc *lsc = arg; paddr_t pa; if (offs < lsc->lsc_sc.sc_size) { pa = bus_dmamem_mmap(lsc->lsc_dmat, &lsc->lsc_seg, 1, offs + offsetof(struct ll_tft_control, cd_img), prot, BUS_DMA_WAITOK | BUS_DMA_COHERENT); return (pa); } return (-1); } static void ll_tft_shutdown(void *arg) { struct ll_tft_softc *lsc = arg; bus_space_write_4(lsc->lsc_dma_iot, lsc->lsc_dma_ioh, 0, CDMAC_STAT_RESET); tft_shutdown(&lsc->lsc_sc); }