1 /* $NetBSD: tft_ll.c,v 1.5 2021/03/29 13:14:13 rin 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 1.5 2021/03/29 13:14:13 rin 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 <sys/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 };
64
65 CTASSERT(offsetof(struct ll_tft_control, cd_img) == sizeof(struct cdmac_descr));
66
67 struct ll_tft_softc {
68 struct tft_softc lsc_sc;
69
70 bus_space_tag_t lsc_dma_iot;
71 bus_space_handle_t lsc_dma_ioh;
72
73 bus_dma_tag_t lsc_dmat;
74 bus_dmamap_t lsc_dmap;
75
76 struct ll_tft_control *lsc_cd;
77 bus_dma_segment_t lsc_seg;
78 };
79
80 static void ll_tft_attach(device_t, device_t, void *);
81 static paddr_t ll_tft_mmap(void *, void *, off_t, int);
82 static void ll_tft_shutdown(void *);
83
84 CFATTACH_DECL_NEW(ll_tft, sizeof(struct ll_tft_softc),
85 xcvbus_child_match, ll_tft_attach, NULL, NULL);
86
87
88 static struct wsdisplay_accessops ll_tft_accessops = {
89 .mmap = ll_tft_mmap,
90 };
91
92
93 static void
ll_tft_attach(device_t parent,device_t self,void * aux)94 ll_tft_attach(device_t parent, device_t self, void *aux)
95 {
96 struct xcvbus_attach_args *vaa = aux;
97 struct ll_dmac *tx = vaa->vaa_tx_dmac;
98 struct ll_tft_softc *lsc = device_private(self);
99 struct tft_softc *sc = &lsc->lsc_sc;
100 int nseg, error;
101
102 KASSERT(tx);
103
104 lsc->lsc_dma_iot = tx->dmac_iot;
105 lsc->lsc_dmat = vaa->vaa_dmat;
106 sc->sc_iot = vaa->vaa_iot;
107 sc->sc_dev = self;
108
109 aprint_normal(": LL_TFT\n");
110
111 if ((error = bus_space_map(sc->sc_iot, vaa->vaa_addr, TFT_SIZE,
112 0, &sc->sc_ioh)) != 0) {
113 aprint_error_dev(self, "could not map device registers\n");
114 goto fail_0;
115 }
116 if ((error = bus_space_map(lsc->lsc_dma_iot, tx->dmac_ctrl_addr,
117 CDMAC_CTRL_SIZE, 0, &lsc->lsc_dma_ioh)) != 0) {
118 aprint_error_dev(self, "could not map dmac registers\n");
119 goto fail_1;
120 }
121
122 /* Fill in resolution, depth, size. */
123 tft_mode(sc->sc_dev);
124
125 /* Allocate and map framebuffer control data. */
126 if ((error = bus_dmamem_alloc(lsc->lsc_dmat,
127 sizeof(struct ll_tft_control) + sc->sc_size, 8, 0,
128 &lsc->lsc_seg, 1, &nseg, 0)) != 0) {
129 aprint_error_dev(self, "could not allocate framebuffer\n");
130 goto fail_2;
131 }
132 if ((error = bus_dmamem_map(lsc->lsc_dmat, &lsc->lsc_seg, nseg,
133 sizeof(struct ll_tft_control) + sc->sc_size,
134 (void **)&lsc->lsc_cd, BUS_DMA_COHERENT)) != 0) {
135 aprint_error_dev(self, "could not map framebuffer\n");
136 goto fail_3;
137 }
138 if ((error = bus_dmamap_create(lsc->lsc_dmat,
139 sizeof(struct ll_tft_control) + sc->sc_size, 1,
140 sizeof(struct ll_tft_control) + sc->sc_size, 0, 0,
141 &lsc->lsc_dmap)) != 0) {
142 aprint_error_dev(self, "could not create framebuffer DMA map\n");
143 goto fail_4;
144 }
145 if ((error = bus_dmamap_load(lsc->lsc_dmat, lsc->lsc_dmap, lsc->lsc_cd,
146 sizeof(struct ll_tft_control) + sc->sc_size, NULL, 0)) != 0) {
147 aprint_error_dev(self, "could not load framebuffer DMA map\n");
148 goto fail_5;
149 }
150
151 /* Clear screen, setup descriptor. */
152 memset(lsc->lsc_cd, 0x00, sizeof(struct ll_tft_control));
153 sc->sc_image = lsc->lsc_cd->cd_img;
154
155 lsc->lsc_cd->cd_dsc.desc_next = lsc->lsc_dmap->dm_segs[0].ds_addr;
156 lsc->lsc_cd->cd_dsc.desc_addr = lsc->lsc_dmap->dm_segs[0].ds_addr +
157 offsetof(struct ll_tft_control, cd_img);
158 lsc->lsc_cd->cd_dsc.desc_size = sc->sc_size;
159 lsc->lsc_cd->cd_dsc.desc_stat = CDMAC_STAT_SOP;
160
161 bus_dmamap_sync(lsc->lsc_dmat, lsc->lsc_dmap, 0,
162 sizeof(struct ll_tft_control) + sc->sc_size,
163 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
164
165 sc->sc_sdhook = shutdownhook_establish(ll_tft_shutdown, sc);
166 if (sc->sc_sdhook == NULL)
167 aprint_error_dev(self,
168 "WARNING: unable to establish shutdown hook\n");
169
170 tft_attach(self, &ll_tft_accessops);
171
172 aprint_normal_dev(self, "video memory pa 0x%08x\n",
173 (uint32_t)lsc->lsc_cd->cd_dsc.desc_addr);
174
175 /* Timing sensitive... */
176 bus_space_write_4(sc->sc_iot, sc->sc_ioh, TFT_CTRL, CTRL_RESET);
177 bus_space_write_4(sc->sc_iot, sc->sc_ioh, TFT_CTRL, CTRL_ENABLE);
178 bus_space_write_4(lsc->lsc_dma_iot, lsc->lsc_dma_ioh, CDMAC_CURDESC,
179 lsc->lsc_dmap->dm_segs[0].ds_addr);
180
181 return ;
182
183 fail_5:
184 bus_dmamap_destroy(lsc->lsc_dmat, lsc->lsc_dmap);
185 fail_4:
186 bus_dmamem_unmap(lsc->lsc_dmat, (void *)lsc->lsc_cd,
187 sizeof(struct ll_tft_control) + sc->sc_size);
188 fail_3:
189 bus_dmamem_free(lsc->lsc_dmat, &lsc->lsc_seg, nseg);
190 fail_2:
191 bus_space_unmap(lsc->lsc_dma_iot, lsc->lsc_dma_ioh, CDMAC_CTRL_SIZE);
192 fail_1:
193 bus_space_unmap(sc->sc_iot, sc->sc_ioh, TFT_SIZE);
194 fail_0:
195 aprint_error_dev(self, "error %d\n", error);
196 }
197
198 static paddr_t
ll_tft_mmap(void * arg,void * scr,off_t offs,int prot)199 ll_tft_mmap(void *arg, void *scr, off_t offs, int prot)
200 {
201 struct ll_tft_softc *lsc = arg;
202 paddr_t pa;
203
204 if (offs < lsc->lsc_sc.sc_size) {
205 pa = bus_dmamem_mmap(lsc->lsc_dmat, &lsc->lsc_seg, 1,
206 offs + offsetof(struct ll_tft_control, cd_img),
207 prot, BUS_DMA_WAITOK | BUS_DMA_COHERENT);
208
209 return (pa);
210 }
211
212 return (-1);
213 }
214
215 static void
ll_tft_shutdown(void * arg)216 ll_tft_shutdown(void *arg)
217 {
218 struct ll_tft_softc *lsc = arg;
219
220 bus_space_write_4(lsc->lsc_dma_iot, lsc->lsc_dma_ioh, 0,
221 CDMAC_STAT_RESET);
222
223 tft_shutdown(&lsc->lsc_sc);
224 }
225