/* $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 <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: tft_ll.c,v 1.4 2011/07/01 19:03:50 dyoung Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/device.h>
#include <sys/queue.h>
#include <uvm/uvm_extern.h>
#include <sys/bus.h>
/* XXX needed? */
#include <dev/wscons/wsdisplayvar.h>
#include <dev/wscons/wsconsio.h>
#include <dev/rasops/rasops.h>
#include <dev/wscons/wsdisplay_vconsvar.h>
#include <evbppc/virtex/dev/xcvbusvar.h>
#include <evbppc/virtex/dev/cdmacreg.h>
#include <evbppc/virtex/dev/tftreg.h>
#include <evbppc/virtex/dev/tftvar.h>
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);
}