2 * Copyright (c) 2016 Justin Hibbits
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 #include <sys/param.h>
29 #include <sys/systm.h>
31 #include <sys/endian.h>
32 #include <sys/kernel.h>
33 #include <sys/module.h>
34 #include <sys/malloc.h>
37 #include <sys/consio.h>
42 #include <dev/fdt/fdt_common.h>
43 #include <dev/ofw/openfirm.h>
44 #include <dev/ofw/ofw_bus.h>
45 #include <dev/ofw/ofw_bus_subr.h>
47 #include <dev/videomode/videomode.h>
48 #include <dev/videomode/edidvar.h>
50 #include <dev/vt/vt.h>
51 #include <dev/vt/colors/vt_termcolors.h>
53 #include <powerpc/mpc85xx/mpc85xx.h>
55 #include <machine/bus.h>
56 #include <machine/cpu.h>
60 #define DIU_DESC_1 0x000 /* Plane1 Area Descriptor Pointer Register */
61 #define DIU_DESC_2 0x004 /* Plane2 Area Descriptor Pointer Register */
62 #define DIU_DESC_3 0x008 /* Plane3 Area Descriptor Pointer Register */
63 #define DIU_GAMMA 0x00C /* Gamma Register */
64 #define DIU_PALETTE 0x010 /* Palette Register */
65 #define DIU_CURSOR 0x014 /* Cursor Register */
66 #define DIU_CURS_POS 0x018 /* Cursor Position Register */
67 #define CURSOR_Y_SHIFT 16
68 #define CURSOR_X_SHIFT 0
69 #define DIU_DIU_MODE 0x01C /* DIU4 Mode */
70 #define DIU_MODE_M 0x7
72 #define DIU_MODE_NORMAL 0x1
73 #define DIU_MODE_2 0x2
74 #define DIU_MODE_3 0x3
75 #define DIU_MODE_COLBAR 0x4
76 #define DIU_BGND 0x020 /* Background */
77 #define DIU_BGND_WB 0x024 /* Background Color in write back Mode Register */
78 #define DIU_DISP_SIZE 0x028 /* Display Size */
81 #define DIU_WB_SIZE 0x02C /* Write back Plane Size Register */
82 #define DELTA_Y_WB_S 16
83 #define DELTA_X_WB_S 0
84 #define DIU_WB_MEM_ADDR 0x030 /* Address to Store the write back Plane Register */
85 #define DIU_HSYN_PARA 0x034 /* Horizontal Sync Parameter */
89 #define DIU_VSYN_PARA 0x038 /* Vertical Sync Parameter */
93 #define DIU_SYNPOL 0x03C /* Synchronize Polarity */
94 #define BP_VS (1 << 4)
95 #define BP_HS (1 << 3)
96 #define INV_CS (1 << 2)
97 #define INV_VS (1 << 1)
98 #define INV_HS (1 << 0)
99 #define INV_PDI_VS (1 << 8) /* Polarity of PDI input VSYNC. */
100 #define INV_PDI_HS (1 << 9) /* Polarity of PDI input HSYNC. */
101 #define INV_PDI_DE (1 << 10) /* Polarity of PDI input DE. */
102 #define DIU_THRESHOLD 0x040 /* Threshold */
103 #define LS_BF_VS_SHIFT 16
104 #define OUT_BUF_LOW_SHIFT 0
105 #define DIU_INT_STATUS 0x044 /* Interrupt Status */
106 #define DIU_INT_MASK 0x048 /* Interrupt Mask */
107 #define DIU_COLBAR_1 0x04C /* COLBAR_1 */
108 #define DIU_COLORBARn_R(x) ((x & 0xff) << 16)
109 #define DIU_COLORBARn_G(x) ((x & 0xff) << 8)
110 #define DIU_COLORBARn_B(x) ((x & 0xff) << 0)
111 #define DIU_COLBAR_2 0x050 /* COLBAR_2 */
112 #define DIU_COLBAR_3 0x054 /* COLBAR_3 */
113 #define DIU_COLBAR_4 0x058 /* COLBAR_4 */
114 #define DIU_COLBAR_5 0x05c /* COLBAR_5 */
115 #define DIU_COLBAR_6 0x060 /* COLBAR_6 */
116 #define DIU_COLBAR_7 0x064 /* COLBAR_7 */
117 #define DIU_COLBAR_8 0x068 /* COLBAR_8 */
118 #define DIU_FILLING 0x06C /* Filling Register */
119 #define DIU_PLUT 0x070 /* Priority Look Up Table Register */
121 /* Control Descriptor */
122 #define DIU_CTRLDESCL(n, m) 0x200 + (0x40 * n) + 0x4 * (m - 1)
123 #define DIU_CTRLDESCLn_1(n) DIU_CTRLDESCL(n, 1)
124 #define DIU_CTRLDESCLn_2(n) DIU_CTRLDESCL(n, 2)
125 #define DIU_CTRLDESCLn_3(n) DIU_CTRLDESCL(n, 3)
126 #define TRANS_SHIFT 20
127 #define DIU_CTRLDESCLn_4(n) DIU_CTRLDESCL(n, 4)
128 #define BPP_MASK 0xf /* Bit per pixel Mask */
129 #define BPP_SHIFT 16 /* Bit per pixel Shift */
131 #define EN_LAYER (1 << 31) /* Enable the layer */
132 #define DIU_CTRLDESCLn_5(n) DIU_CTRLDESCL(n, 5)
133 #define DIU_CTRLDESCLn_6(n) DIU_CTRLDESCL(n, 6)
134 #define DIU_CTRLDESCLn_7(n) DIU_CTRLDESCL(n, 7)
135 #define DIU_CTRLDESCLn_8(n) DIU_CTRLDESCL(n, 8)
136 #define DIU_CTRLDESCLn_9(n) DIU_CTRLDESCL(n, 9)
141 uint32_t panel_width;
142 uint32_t panel_height;
153 struct diu_area_descriptor {
154 uint32_t pixel_format;
155 uint32_t bitmap_address;
156 uint32_t source_size;
159 uint32_t display_offset;
160 uint32_t chroma_key_max;
161 uint32_t chroma_key_min;
162 uint32_t next_ad_addr;
166 struct resource *res[2];
169 device_t sc_fbd; /* fbd child */
170 struct fb_info sc_info;
171 struct panel_info sc_panel;
172 struct diu_area_descriptor *sc_planes[3];
177 static struct resource_spec diu_spec[] = {
178 { SYS_RES_MEMORY, 0, RF_ACTIVE },
179 { SYS_RES_IRQ, 0, RF_ACTIVE },
184 diu_probe(device_t dev)
187 if (!ofw_bus_status_okay(dev))
190 if (!ofw_bus_is_compatible(dev, "fsl,diu"))
193 device_set_desc(dev, "Freescale Display Interface Unit");
194 return (BUS_PROBE_DEFAULT);
200 struct diu_softc *sc;
206 reg = bus_read_4(sc->res[0], DIU_INT_STATUS);
207 bus_write_4(sc->res[0], DIU_INT_STATUS, reg);
209 /* TODO interrupt handler */
213 diu_set_pxclk(device_t dev, unsigned int freq)
215 unsigned long bus_freq;
219 if ((bus_freq = mpc85xx_get_platform_clock()) <= 0) {
220 device_printf(dev, "Unable to get bus frequency\n");
226 /* adding freq/2 to round-to-closest */
227 pxclk_set = min(max((bus_freq + freq/2) / freq, 2), 255) << 16;
228 pxclk_set |= OCP85XX_CLKDVDR_PXCKEN;
229 clkdvd = ccsr_read4(OCP85XX_CLKDVDR);
230 clkdvd &= ~(OCP85XX_CLKDVDR_PXCKEN | OCP85XX_CLKDVDR_PXCKINV |
231 OCP85XX_CLKDVDR_PXCLK_MASK);
232 ccsr_write4(OCP85XX_CLKDVDR, clkdvd);
233 ccsr_write4(OCP85XX_CLKDVDR, clkdvd | pxclk_set);
239 diu_init(struct diu_softc *sc)
241 struct panel_info *panel;
244 panel = &sc->sc_panel;
246 /* Temporarily disable the DIU while configuring */
247 reg = bus_read_4(sc->res[0], DIU_DIU_MODE);
248 reg &= ~(DIU_MODE_M << DIU_MODE_S);
249 bus_write_4(sc->res[0], DIU_DIU_MODE, reg);
251 if (diu_set_pxclk(sc->sc_dev, panel->panel_freq) < 0) {
256 /* Need to set these somehow later... */
257 bus_write_4(sc->res[0], DIU_GAMMA, vtophys(sc->sc_gamma));
258 bus_write_4(sc->res[0], DIU_CURSOR, vtophys(sc->sc_cursor));
259 bus_write_4(sc->res[0], DIU_CURS_POS, 0);
261 reg = ((sc->sc_info.fb_height) << DELTA_Y_S);
262 reg |= sc->sc_info.fb_width;
263 bus_write_4(sc->res[0], DIU_DISP_SIZE, reg);
265 reg = (panel->panel_hbp << BP_H_SHIFT);
266 reg |= (panel->panel_hpw << PW_H_SHIFT);
267 reg |= (panel->panel_hfp << FP_H_SHIFT);
268 bus_write_4(sc->res[0], DIU_HSYN_PARA, reg);
270 reg = (panel->panel_vbp << BP_V_SHIFT);
271 reg |= (panel->panel_vpw << PW_V_SHIFT);
272 reg |= (panel->panel_vfp << FP_V_SHIFT);
273 bus_write_4(sc->res[0], DIU_VSYN_PARA, reg);
275 bus_write_4(sc->res[0], DIU_BGND, 0);
277 /* Mask all the interrupts */
278 bus_write_4(sc->res[0], DIU_INT_MASK, 0x3f);
280 /* Reset all layers */
281 sc->sc_planes[0] = contigmalloc(sizeof(struct diu_area_descriptor),
282 M_DEVBUF, M_ZERO, 0, BUS_SPACE_MAXADDR_32BIT, 32, 0);
283 bus_write_4(sc->res[0], DIU_DESC_1, vtophys(sc->sc_planes[0]));
284 bus_write_4(sc->res[0], DIU_DESC_2, 0);
285 bus_write_4(sc->res[0], DIU_DESC_3, 0);
287 /* Setup first plane */
288 /* Area descriptor fields are little endian, so byte swap. */
289 /* Word 0: Pixel format */
290 /* Set to 8:8:8:8 ARGB, 4 bytes per pixel, no flip. */
291 #define MAKE_PXLFMT(as,rs,gs,bs,a,r,g,b,f,s) \
292 htole32((as << (4 * a)) | (rs << 4 * r) | \
293 (gs << 4 * g) | (bs << 4 * b) | \
294 (f << 28) | (s << 16) | \
295 (a << 25) | (r << 19) | \
296 (g << 21) | (b << 24))
297 reg = MAKE_PXLFMT(8, 8, 8, 8, 3, 2, 1, 0, 1, 3);
298 sc->sc_planes[0]->pixel_format = reg;
299 /* Word 1: Bitmap address */
300 sc->sc_planes[0]->bitmap_address = htole32(sc->sc_info.fb_pbase);
301 /* Word 2: Source size/global alpha */
302 reg = (sc->sc_info.fb_width | (sc->sc_info.fb_height << 12));
303 sc->sc_planes[0]->source_size = htole32(reg);
304 /* Word 3: AOI Size */
305 reg = (sc->sc_info.fb_width | (sc->sc_info.fb_height << 16));
306 sc->sc_planes[0]->aoi_size = htole32(reg);
307 /* Word 4: AOI Offset */
308 sc->sc_planes[0]->aoi_offset = 0;
309 /* Word 5: Display offset */
310 sc->sc_planes[0]->display_offset = 0;
311 /* Word 6: Chroma key max */
312 sc->sc_planes[0]->chroma_key_max = 0;
313 /* Word 7: Chroma key min */
314 reg = 255 << 16 | 255 << 8 | 255;
315 sc->sc_planes[0]->chroma_key_min = htole32(reg);
316 /* Word 8: Next AD */
317 sc->sc_planes[0]->next_ad_addr = 0;
319 /* TODO: derive this from the panel size */
320 bus_write_4(sc->res[0], DIU_PLUT, 0x1f5f666);
322 /* Enable DIU in normal mode */
323 reg = bus_read_4(sc->res[0], DIU_DIU_MODE);
324 reg &= ~(DIU_MODE_M << DIU_MODE_S);
325 reg |= (DIU_MODE_NORMAL << DIU_MODE_S);
326 bus_write_4(sc->res[0], DIU_DIU_MODE, reg);
332 diu_attach(device_t dev)
334 struct edid_info edid;
335 struct diu_softc *sc;
336 const struct videomode *videomode;
343 sc = device_get_softc(dev);
346 if (bus_alloc_resources(dev, diu_spec, sc->res)) {
347 device_printf(dev, "could not allocate resources\n");
351 node = ofw_bus_get_node(dev);
352 /* Setup interrupt handler */
353 err = bus_setup_intr(dev, sc->res[1], INTR_TYPE_BIO | INTR_MPSAFE,
354 NULL, diu_intr, sc, &sc->ih);
356 device_printf(dev, "Unable to alloc interrupt resource.\n");
360 /* TODO: Eventually, allow EDID to be dynamically provided. */
361 if (OF_getprop_alloc(node, "edid", &edid_cells) <= 0) {
362 /* Get a resource hint: hint.fb.N.mode */
363 if (resource_string_value(device_get_name(dev),
364 device_get_unit(dev), "mode", &vm_name) != 0) {
366 "No EDID data and no video-mode env set\n");
370 if (edid_cells != NULL) {
371 if (edid_parse(edid_cells, &edid) != 0) {
372 device_printf(dev, "Error parsing EDID\n");
373 OF_prop_free(edid_cells);
376 videomode = edid.edid_preferred_mode;
378 /* Parse video-mode kenv variable. */
379 if ((err = sscanf(vm_name, "%dx%d@%d", &w, &h, &r)) != 3) {
381 "Cannot parse video mode: %s\n", vm_name);
384 videomode = pick_mode_by_ref(w, h, r);
385 if (videomode == NULL) {
387 "Cannot find mode for %dx%d@%d", w, h, r);
392 sc->sc_panel.panel_width = videomode->hdisplay;
393 sc->sc_panel.panel_height = videomode->vdisplay;
394 sc->sc_panel.panel_hbp = videomode->hsync_start - videomode->hdisplay;
395 sc->sc_panel.panel_hfp = videomode->htotal - videomode->hsync_end;
396 sc->sc_panel.panel_hpw = videomode->hsync_end - videomode->hsync_start;
397 sc->sc_panel.panel_vbp = videomode->vsync_start - videomode->vdisplay;
398 sc->sc_panel.panel_vfp = videomode->vtotal - videomode->vsync_end;
399 sc->sc_panel.panel_vpw = videomode->vsync_end - videomode->vsync_start;
400 sc->sc_panel.panel_freq = videomode->dot_clock;
402 sc->sc_info.fb_width = sc->sc_panel.panel_width;
403 sc->sc_info.fb_height = sc->sc_panel.panel_height;
404 sc->sc_info.fb_stride = sc->sc_info.fb_width * 4;
405 sc->sc_info.fb_bpp = sc->sc_info.fb_depth = 32;
406 sc->sc_info.fb_size = sc->sc_info.fb_height * sc->sc_info.fb_stride;
407 sc->sc_info.fb_vbase = (intptr_t)contigmalloc(sc->sc_info.fb_size,
408 M_DEVBUF, M_ZERO, 0, BUS_SPACE_MAXADDR_32BIT, PAGE_SIZE, 0);
409 sc->sc_info.fb_pbase = (intptr_t)vtophys(sc->sc_info.fb_vbase);
410 sc->sc_info.fb_flags = FB_FLAG_MEMATTR;
411 sc->sc_info.fb_memattr = VM_MEMATTR_DEFAULT;
413 /* Gamma table is 3 consecutive segments of 256 bytes. */
414 sc->sc_gamma = contigmalloc(3 * 256, M_DEVBUF, 0, 0,
415 BUS_SPACE_MAXADDR_32BIT, PAGE_SIZE, 0);
416 /* Initialize gamma to default */
417 for (i = 0; i < 3 * 256; i++)
418 sc->sc_gamma[i] = (i % 256);
420 /* Cursor format is 32x32x16bpp */
421 sc->sc_cursor = contigmalloc(32 * 32 * 2, M_DEVBUF, M_ZERO, 0,
422 BUS_SPACE_MAXADDR_32BIT, PAGE_SIZE, 0);
426 sc->sc_info.fb_name = device_get_nameunit(dev);
428 /* Ask newbus to attach framebuffer device to me. */
429 sc->sc_fbd = device_add_child(dev, "fbd", device_get_unit(dev));
430 if (sc->sc_fbd == NULL)
431 device_printf(dev, "Can't attach fbd device\n");
433 if ((err = device_probe_and_attach(sc->sc_fbd)) != 0) {
434 device_printf(dev, "Failed to attach fbd device: %d\n", err);
440 static struct fb_info *
441 diu_fb_getinfo(device_t dev)
443 struct diu_softc *sc = device_get_softc(dev);
445 return (&sc->sc_info);
448 static device_method_t diu_methods[] = {
449 DEVMETHOD(device_probe, diu_probe),
450 DEVMETHOD(device_attach, diu_attach),
452 /* Framebuffer service methods */
453 DEVMETHOD(fb_getinfo, diu_fb_getinfo),
457 static driver_t diu_driver = {
460 sizeof(struct diu_softc),
463 DRIVER_MODULE(fb, simplebus, diu_driver, 0, 0);