223 lines
6.7 KiB
C
223 lines
6.7 KiB
C
/* $NetBSD: tft_ll.c,v 1.4 2011/07/01 19:03:50 dyoung Exp $ */
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/*
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* Copyright (c) 2006 Jachym Holecek
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* All rights reserved.
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*
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* Written for DFC Design, s.r.o.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: tft_ll.c,v 1.4 2011/07/01 19:03:50 dyoung Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#include <sys/kernel.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <sys/device.h>
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#include <sys/queue.h>
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#include <uvm/uvm_extern.h>
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#include <sys/bus.h>
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/* XXX needed? */
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#include <dev/wscons/wsdisplayvar.h>
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#include <dev/wscons/wsconsio.h>
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#include <dev/rasops/rasops.h>
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#include <dev/wscons/wsdisplay_vconsvar.h>
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#include <evbppc/virtex/dev/xcvbusvar.h>
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#include <evbppc/virtex/dev/cdmacreg.h>
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#include <evbppc/virtex/dev/tftreg.h>
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#include <evbppc/virtex/dev/tftvar.h>
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struct ll_tft_control {
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struct cdmac_descr cd_dsc;
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u_char cd_img[];
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} __packed;
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struct ll_tft_softc {
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struct tft_softc lsc_sc;
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bus_space_tag_t lsc_dma_iot;
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bus_space_handle_t lsc_dma_ioh;
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bus_dma_tag_t lsc_dmat;
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bus_dmamap_t lsc_dmap;
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struct ll_tft_control *lsc_cd;
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bus_dma_segment_t lsc_seg;
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};
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static void ll_tft_attach(device_t, device_t, void *);
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static paddr_t ll_tft_mmap(void *, void *, off_t, int);
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static void ll_tft_shutdown(void *);
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CFATTACH_DECL_NEW(ll_tft, sizeof(struct ll_tft_softc),
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xcvbus_child_match, ll_tft_attach, NULL, NULL);
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static struct wsdisplay_accessops ll_tft_accessops = {
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.mmap = ll_tft_mmap,
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};
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static void
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ll_tft_attach(device_t parent, device_t self, void *aux)
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{
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struct xcvbus_attach_args *vaa = aux;
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struct ll_dmac *tx = vaa->vaa_tx_dmac;
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struct ll_tft_softc *lsc = device_private(self);
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struct tft_softc *sc = &lsc->lsc_sc;
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int nseg, error;
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KASSERT(tx);
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lsc->lsc_dma_iot = tx->dmac_iot;
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lsc->lsc_dmat = vaa->vaa_dmat;
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sc->sc_iot = vaa->vaa_iot;
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sc->sc_dev = self;
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aprint_normal(": LL_TFT\n");
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if ((error = bus_space_map(sc->sc_iot, vaa->vaa_addr, TFT_SIZE,
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0, &sc->sc_ioh)) != 0) {
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aprint_error_dev(self, "could not map device registers\n");
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goto fail_0;
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}
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if ((error = bus_space_map(lsc->lsc_dma_iot, tx->dmac_ctrl_addr,
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CDMAC_CTRL_SIZE, 0, &lsc->lsc_dma_ioh)) != 0) {
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aprint_error_dev(self, "could not map dmac registers\n");
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goto fail_1;
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}
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/* Fill in resolution, depth, size. */
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tft_mode(sc->sc_dev);
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/* Allocate and map framebuffer control data. */
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if ((error = bus_dmamem_alloc(lsc->lsc_dmat,
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sizeof(struct ll_tft_control) + sc->sc_size, 8, 0,
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&lsc->lsc_seg, 1, &nseg, 0)) != 0) {
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aprint_error_dev(self, "could not allocate framebuffer\n");
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goto fail_2;
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}
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if ((error = bus_dmamem_map(lsc->lsc_dmat, &lsc->lsc_seg, nseg,
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sizeof(struct ll_tft_control) + sc->sc_size,
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(void **)&lsc->lsc_cd, BUS_DMA_COHERENT)) != 0) {
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aprint_error_dev(self, "could not map framebuffer\n");
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goto fail_3;
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}
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if ((error = bus_dmamap_create(lsc->lsc_dmat,
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sizeof(struct ll_tft_control) + sc->sc_size, 1,
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sizeof(struct ll_tft_control) + sc->sc_size, 0, 0,
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&lsc->lsc_dmap)) != 0) {
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aprint_error_dev(self, "could not create framebuffer DMA map\n");
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goto fail_4;
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}
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if ((error = bus_dmamap_load(lsc->lsc_dmat, lsc->lsc_dmap, lsc->lsc_cd,
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sizeof(struct ll_tft_control) + sc->sc_size, NULL, 0)) != 0) {
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aprint_error_dev(self, "could not load framebuffer DMA map\n");
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goto fail_5;
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}
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/* Clear screen, setup descriptor. */
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memset(lsc->lsc_cd, 0x00, sizeof(struct ll_tft_control));
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sc->sc_image = lsc->lsc_cd->cd_img;
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lsc->lsc_cd->cd_dsc.desc_next = lsc->lsc_dmap->dm_segs[0].ds_addr;
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lsc->lsc_cd->cd_dsc.desc_addr = lsc->lsc_dmap->dm_segs[0].ds_addr +
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offsetof(struct ll_tft_control, cd_img);
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lsc->lsc_cd->cd_dsc.desc_size = sc->sc_size;
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lsc->lsc_cd->cd_dsc.desc_stat = CDMAC_STAT_SOP;
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bus_dmamap_sync(lsc->lsc_dmat, lsc->lsc_dmap, 0,
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sizeof(struct ll_tft_control) + sc->sc_size,
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BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
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sc->sc_sdhook = shutdownhook_establish(ll_tft_shutdown, sc);
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if (sc->sc_sdhook == NULL)
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aprint_error_dev(self,
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"WARNING: unable to establish shutdown hook\n");
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tft_attach(self, &ll_tft_accessops);
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aprint_normal_dev(self, "video memory pa 0x%08x\n",
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(uint32_t)lsc->lsc_cd->cd_dsc.desc_addr);
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/* Timing sensitive... */
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bus_space_write_4(sc->sc_iot, sc->sc_ioh, TFT_CTRL, CTRL_RESET);
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bus_space_write_4(sc->sc_iot, sc->sc_ioh, TFT_CTRL, CTRL_ENABLE);
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bus_space_write_4(lsc->lsc_dma_iot, lsc->lsc_dma_ioh, CDMAC_CURDESC,
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lsc->lsc_dmap->dm_segs[0].ds_addr);
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return ;
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fail_5:
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bus_dmamap_destroy(lsc->lsc_dmat, lsc->lsc_dmap);
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fail_4:
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bus_dmamem_unmap(lsc->lsc_dmat, (void *)lsc->lsc_cd,
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sizeof(struct ll_tft_control) + sc->sc_size);
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fail_3:
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bus_dmamem_free(lsc->lsc_dmat, &lsc->lsc_seg, nseg);
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fail_2:
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bus_space_unmap(lsc->lsc_dma_iot, lsc->lsc_dma_ioh, CDMAC_CTRL_SIZE);
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fail_1:
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bus_space_unmap(sc->sc_iot, sc->sc_ioh, TFT_SIZE);
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fail_0:
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aprint_error_dev(self, "error %d\n", error);
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}
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static paddr_t
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ll_tft_mmap(void *arg, void *scr, off_t offs, int prot)
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{
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struct ll_tft_softc *lsc = arg;
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paddr_t pa;
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if (offs < lsc->lsc_sc.sc_size) {
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pa = bus_dmamem_mmap(lsc->lsc_dmat, &lsc->lsc_seg, 1,
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offs + offsetof(struct ll_tft_control, cd_img),
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prot, BUS_DMA_WAITOK | BUS_DMA_COHERENT);
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return (pa);
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}
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return (-1);
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}
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static void
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ll_tft_shutdown(void *arg)
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{
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struct ll_tft_softc *lsc = arg;
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bus_space_write_4(lsc->lsc_dma_iot, lsc->lsc_dma_ioh, 0,
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CDMAC_STAT_RESET);
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tft_shutdown(&lsc->lsc_sc);
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}
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