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 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/systm.h>
33 #include <sys/endian.h>
34 #include <sys/kernel.h>
35 #include <sys/module.h>
36 #include <sys/malloc.h>
39 #include <sys/consio.h>
44 #include <dev/fdt/fdt_common.h>
45 #include <dev/ofw/openfirm.h>
46 #include <dev/ofw/ofw_bus.h>
47 #include <dev/ofw/ofw_bus_subr.h>
49 #include <dev/videomode/videomode.h>
50 #include <dev/videomode/edidvar.h>
52 #include <dev/vt/vt.h>
53 #include <dev/vt/colors/vt_termcolors.h>
55 #include <powerpc/mpc85xx/mpc85xx.h>
57 #include <machine/bus.h>
58 #include <machine/cpu.h>
62 #define DIU_DESC_1 0x000 /* Plane1 Area Descriptor Pointer Register */
63 #define DIU_DESC_2 0x004 /* Plane2 Area Descriptor Pointer Register */
64 #define DIU_DESC_3 0x008 /* Plane3 Area Descriptor Pointer Register */
65 #define DIU_GAMMA 0x00C /* Gamma Register */
66 #define DIU_PALETTE 0x010 /* Palette Register */
67 #define DIU_CURSOR 0x014 /* Cursor Register */
68 #define DIU_CURS_POS 0x018 /* Cursor Position Register */
69 #define CURSOR_Y_SHIFT 16
70 #define CURSOR_X_SHIFT 0
71 #define DIU_DIU_MODE 0x01C /* DIU4 Mode */
72 #define DIU_MODE_M 0x7
74 #define DIU_MODE_NORMAL 0x1
75 #define DIU_MODE_2 0x2
76 #define DIU_MODE_3 0x3
77 #define DIU_MODE_COLBAR 0x4
78 #define DIU_BGND 0x020 /* Background */
79 #define DIU_BGND_WB 0x024 /* Background Color in write back Mode Register */
80 #define DIU_DISP_SIZE 0x028 /* Display Size */
83 #define DIU_WB_SIZE 0x02C /* Write back Plane Size Register */
84 #define DELTA_Y_WB_S 16
85 #define DELTA_X_WB_S 0
86 #define DIU_WB_MEM_ADDR 0x030 /* Address to Store the write back Plane Register */
87 #define DIU_HSYN_PARA 0x034 /* Horizontal Sync Parameter */
91 #define DIU_VSYN_PARA 0x038 /* Vertical Sync Parameter */
95 #define DIU_SYNPOL 0x03C /* Synchronize Polarity */
96 #define BP_VS (1 << 4)
97 #define BP_HS (1 << 3)
98 #define INV_CS (1 << 2)
99 #define INV_VS (1 << 1)
100 #define INV_HS (1 << 0)
101 #define INV_PDI_VS (1 << 8) /* Polarity of PDI input VSYNC. */
102 #define INV_PDI_HS (1 << 9) /* Polarity of PDI input HSYNC. */
103 #define INV_PDI_DE (1 << 10) /* Polarity of PDI input DE. */
104 #define DIU_THRESHOLD 0x040 /* Threshold */
105 #define LS_BF_VS_SHIFT 16
106 #define OUT_BUF_LOW_SHIFT 0
107 #define DIU_INT_STATUS 0x044 /* Interrupt Status */
108 #define DIU_INT_MASK 0x048 /* Interrupt Mask */
109 #define DIU_COLBAR_1 0x04C /* COLBAR_1 */
110 #define DIU_COLORBARn_R(x) ((x & 0xff) << 16)
111 #define DIU_COLORBARn_G(x) ((x & 0xff) << 8)
112 #define DIU_COLORBARn_B(x) ((x & 0xff) << 0)
113 #define DIU_COLBAR_2 0x050 /* COLBAR_2 */
114 #define DIU_COLBAR_3 0x054 /* COLBAR_3 */
115 #define DIU_COLBAR_4 0x058 /* COLBAR_4 */
116 #define DIU_COLBAR_5 0x05c /* COLBAR_5 */
117 #define DIU_COLBAR_6 0x060 /* COLBAR_6 */
118 #define DIU_COLBAR_7 0x064 /* COLBAR_7 */
119 #define DIU_COLBAR_8 0x068 /* COLBAR_8 */
120 #define DIU_FILLING 0x06C /* Filling Register */
121 #define DIU_PLUT 0x070 /* Priority Look Up Table Register */
123 /* Control Descriptor */
124 #define DIU_CTRLDESCL(n, m) 0x200 + (0x40 * n) + 0x4 * (m - 1)
125 #define DIU_CTRLDESCLn_1(n) DIU_CTRLDESCL(n, 1)
126 #define DIU_CTRLDESCLn_2(n) DIU_CTRLDESCL(n, 2)
127 #define DIU_CTRLDESCLn_3(n) DIU_CTRLDESCL(n, 3)
128 #define TRANS_SHIFT 20
129 #define DIU_CTRLDESCLn_4(n) DIU_CTRLDESCL(n, 4)
130 #define BPP_MASK 0xf /* Bit per pixel Mask */
131 #define BPP_SHIFT 16 /* Bit per pixel Shift */
133 #define EN_LAYER (1 << 31) /* Enable the layer */
134 #define DIU_CTRLDESCLn_5(n) DIU_CTRLDESCL(n, 5)
135 #define DIU_CTRLDESCLn_6(n) DIU_CTRLDESCL(n, 6)
136 #define DIU_CTRLDESCLn_7(n) DIU_CTRLDESCL(n, 7)
137 #define DIU_CTRLDESCLn_8(n) DIU_CTRLDESCL(n, 8)
138 #define DIU_CTRLDESCLn_9(n) DIU_CTRLDESCL(n, 9)
143 uint32_t panel_width;
144 uint32_t panel_height;
155 struct diu_area_descriptor {
156 uint32_t pixel_format;
157 uint32_t bitmap_address;
158 uint32_t source_size;
161 uint32_t display_offset;
162 uint32_t chroma_key_max;
163 uint32_t chroma_key_min;
164 uint32_t next_ad_addr;
168 struct resource *res[2];
171 device_t sc_fbd; /* fbd child */
172 struct fb_info sc_info;
173 struct panel_info sc_panel;
174 struct diu_area_descriptor *sc_planes[3];
179 static struct resource_spec diu_spec[] = {
180 { SYS_RES_MEMORY, 0, RF_ACTIVE },
181 { SYS_RES_IRQ, 0, RF_ACTIVE },
186 diu_probe(device_t dev)
189 if (!ofw_bus_status_okay(dev))
192 if (!ofw_bus_is_compatible(dev, "fsl,diu"))
195 device_set_desc(dev, "Freescale Display Interface Unit");
196 return (BUS_PROBE_DEFAULT);
202 struct diu_softc *sc;
208 reg = bus_read_4(sc->res[0], DIU_INT_STATUS);
209 bus_write_4(sc->res[0], DIU_INT_STATUS, reg);
211 /* TODO interrupt handler */
215 diu_set_pxclk(device_t dev, unsigned int freq)
217 unsigned long bus_freq;
221 if ((bus_freq = mpc85xx_get_platform_clock()) <= 0) {
222 device_printf(dev, "Unable to get bus frequency\n");
228 /* adding freq/2 to round-to-closest */
229 pxclk_set = min(max((bus_freq + freq/2) / freq, 2), 255) << 16;
230 pxclk_set |= OCP85XX_CLKDVDR_PXCKEN;
231 clkdvd = ccsr_read4(OCP85XX_CLKDVDR);
232 clkdvd &= ~(OCP85XX_CLKDVDR_PXCKEN | OCP85XX_CLKDVDR_PXCKINV |
233 OCP85XX_CLKDVDR_PXCLK_MASK);
234 ccsr_write4(OCP85XX_CLKDVDR, clkdvd);
235 ccsr_write4(OCP85XX_CLKDVDR, clkdvd | pxclk_set);
241 diu_init(struct diu_softc *sc)
243 struct panel_info *panel;
246 panel = &sc->sc_panel;
248 /* Temporarily disable the DIU while configuring */
249 reg = bus_read_4(sc->res[0], DIU_DIU_MODE);
250 reg &= ~(DIU_MODE_M << DIU_MODE_S);
251 bus_write_4(sc->res[0], DIU_DIU_MODE, reg);
253 if (diu_set_pxclk(sc->sc_dev, panel->panel_freq) < 0) {
258 /* Need to set these somehow later... */
259 bus_write_4(sc->res[0], DIU_GAMMA, vtophys(sc->sc_gamma));
260 bus_write_4(sc->res[0], DIU_CURSOR, vtophys(sc->sc_cursor));
261 bus_write_4(sc->res[0], DIU_CURS_POS, 0);
263 reg = ((sc->sc_info.fb_height) << DELTA_Y_S);
264 reg |= sc->sc_info.fb_width;
265 bus_write_4(sc->res[0], DIU_DISP_SIZE, reg);
267 reg = (panel->panel_hbp << BP_H_SHIFT);
268 reg |= (panel->panel_hpw << PW_H_SHIFT);
269 reg |= (panel->panel_hfp << FP_H_SHIFT);
270 bus_write_4(sc->res[0], DIU_HSYN_PARA, reg);
272 reg = (panel->panel_vbp << BP_V_SHIFT);
273 reg |= (panel->panel_vpw << PW_V_SHIFT);
274 reg |= (panel->panel_vfp << FP_V_SHIFT);
275 bus_write_4(sc->res[0], DIU_VSYN_PARA, reg);
277 bus_write_4(sc->res[0], DIU_BGND, 0);
279 /* Mask all the interrupts */
280 bus_write_4(sc->res[0], DIU_INT_MASK, 0x3f);
282 /* Reset all layers */
283 sc->sc_planes[0] = contigmalloc(sizeof(struct diu_area_descriptor),
284 M_DEVBUF, M_ZERO, 0, BUS_SPACE_MAXADDR_32BIT, 32, 0);
285 bus_write_4(sc->res[0], DIU_DESC_1, vtophys(sc->sc_planes[0]));
286 bus_write_4(sc->res[0], DIU_DESC_2, 0);
287 bus_write_4(sc->res[0], DIU_DESC_3, 0);
289 /* Setup first plane */
290 /* Area descriptor fields are little endian, so byte swap. */
291 /* Word 0: Pixel format */
292 /* Set to 8:8:8:8 ARGB, 4 bytes per pixel, no flip. */
293 #define MAKE_PXLFMT(as,rs,gs,bs,a,r,g,b,f,s) \
294 htole32((as << (4 * a)) | (rs << 4 * r) | \
295 (gs << 4 * g) | (bs << 4 * b) | \
296 (f << 28) | (s << 16) | \
297 (a << 25) | (r << 19) | \
298 (g << 21) | (b << 24))
299 reg = MAKE_PXLFMT(8, 8, 8, 8, 3, 2, 1, 0, 1, 3);
300 sc->sc_planes[0]->pixel_format = reg;
301 /* Word 1: Bitmap address */
302 sc->sc_planes[0]->bitmap_address = htole32(sc->sc_info.fb_pbase);
303 /* Word 2: Source size/global alpha */
304 reg = (sc->sc_info.fb_width | (sc->sc_info.fb_height << 12));
305 sc->sc_planes[0]->source_size = htole32(reg);
306 /* Word 3: AOI Size */
307 reg = (sc->sc_info.fb_width | (sc->sc_info.fb_height << 16));
308 sc->sc_planes[0]->aoi_size = htole32(reg);
309 /* Word 4: AOI Offset */
310 sc->sc_planes[0]->aoi_offset = 0;
311 /* Word 5: Display offset */
312 sc->sc_planes[0]->display_offset = 0;
313 /* Word 6: Chroma key max */
314 sc->sc_planes[0]->chroma_key_max = 0;
315 /* Word 7: Chroma key min */
316 reg = 255 << 16 | 255 << 8 | 255;
317 sc->sc_planes[0]->chroma_key_min = htole32(reg);
318 /* Word 8: Next AD */
319 sc->sc_planes[0]->next_ad_addr = 0;
321 /* TODO: derive this from the panel size */
322 bus_write_4(sc->res[0], DIU_PLUT, 0x1f5f666);
324 /* Enable DIU in normal mode */
325 reg = bus_read_4(sc->res[0], DIU_DIU_MODE);
326 reg &= ~(DIU_MODE_M << DIU_MODE_S);
327 reg |= (DIU_MODE_NORMAL << DIU_MODE_S);
328 bus_write_4(sc->res[0], DIU_DIU_MODE, reg);
334 diu_attach(device_t dev)
336 struct edid_info edid;
337 struct diu_softc *sc;
338 const struct videomode *videomode;
345 sc = device_get_softc(dev);
348 if (bus_alloc_resources(dev, diu_spec, sc->res)) {
349 device_printf(dev, "could not allocate resources\n");
353 node = ofw_bus_get_node(dev);
354 /* Setup interrupt handler */
355 err = bus_setup_intr(dev, sc->res[1], INTR_TYPE_BIO | INTR_MPSAFE,
356 NULL, diu_intr, sc, &sc->ih);
358 device_printf(dev, "Unable to alloc interrupt resource.\n");
362 /* TODO: Eventually, allow EDID to be dynamically provided. */
363 if (OF_getprop_alloc(node, "edid", &edid_cells) <= 0) {
364 /* Get a resource hint: hint.fb.N.mode */
365 if (resource_string_value(device_get_name(dev),
366 device_get_unit(dev), "mode", &vm_name) != 0) {
368 "No EDID data and no video-mode env set\n");
372 if (edid_cells != NULL) {
373 if (edid_parse(edid_cells, &edid) != 0) {
374 device_printf(dev, "Error parsing EDID\n");
375 OF_prop_free(edid_cells);
378 videomode = edid.edid_preferred_mode;
380 /* Parse video-mode kenv variable. */
381 if ((err = sscanf(vm_name, "%dx%d@%d", &w, &h, &r)) != 3) {
383 "Cannot parse video mode: %s\n", vm_name);
386 videomode = pick_mode_by_ref(w, h, r);
387 if (videomode == NULL) {
389 "Cannot find mode for %dx%d@%d", w, h, r);
394 sc->sc_panel.panel_width = videomode->hdisplay;
395 sc->sc_panel.panel_height = videomode->vdisplay;
396 sc->sc_panel.panel_hbp = videomode->hsync_start - videomode->hdisplay;
397 sc->sc_panel.panel_hfp = videomode->htotal - videomode->hsync_end;
398 sc->sc_panel.panel_hpw = videomode->hsync_end - videomode->hsync_start;
399 sc->sc_panel.panel_vbp = videomode->vsync_start - videomode->vdisplay;
400 sc->sc_panel.panel_vfp = videomode->vtotal - videomode->vsync_end;
401 sc->sc_panel.panel_vpw = videomode->vsync_end - videomode->vsync_start;
402 sc->sc_panel.panel_freq = videomode->dot_clock;
404 sc->sc_info.fb_width = sc->sc_panel.panel_width;
405 sc->sc_info.fb_height = sc->sc_panel.panel_height;
406 sc->sc_info.fb_stride = sc->sc_info.fb_width * 4;
407 sc->sc_info.fb_bpp = sc->sc_info.fb_depth = 32;
408 sc->sc_info.fb_size = sc->sc_info.fb_height * sc->sc_info.fb_stride;
409 sc->sc_info.fb_vbase = (intptr_t)contigmalloc(sc->sc_info.fb_size,
410 M_DEVBUF, M_ZERO, 0, BUS_SPACE_MAXADDR_32BIT, PAGE_SIZE, 0);
411 sc->sc_info.fb_pbase = (intptr_t)vtophys(sc->sc_info.fb_vbase);
412 sc->sc_info.fb_flags = FB_FLAG_MEMATTR;
413 sc->sc_info.fb_memattr = VM_MEMATTR_DEFAULT;
415 /* Gamma table is 3 consecutive segments of 256 bytes. */
416 sc->sc_gamma = contigmalloc(3 * 256, M_DEVBUF, 0, 0,
417 BUS_SPACE_MAXADDR_32BIT, PAGE_SIZE, 0);
418 /* Initialize gamma to default */
419 for (i = 0; i < 3 * 256; i++)
420 sc->sc_gamma[i] = (i % 256);
422 /* Cursor format is 32x32x16bpp */
423 sc->sc_cursor = contigmalloc(32 * 32 * 2, M_DEVBUF, M_ZERO, 0,
424 BUS_SPACE_MAXADDR_32BIT, PAGE_SIZE, 0);
428 sc->sc_info.fb_name = device_get_nameunit(dev);
430 /* Ask newbus to attach framebuffer device to me. */
431 sc->sc_fbd = device_add_child(dev, "fbd", device_get_unit(dev));
432 if (sc->sc_fbd == NULL)
433 device_printf(dev, "Can't attach fbd device\n");
435 if ((err = device_probe_and_attach(sc->sc_fbd)) != 0) {
436 device_printf(dev, "Failed to attach fbd device: %d\n", err);
442 static struct fb_info *
443 diu_fb_getinfo(device_t dev)
445 struct diu_softc *sc = device_get_softc(dev);
447 return (&sc->sc_info);
450 static device_method_t diu_methods[] = {
451 DEVMETHOD(device_probe, diu_probe),
452 DEVMETHOD(device_attach, diu_attach),
454 /* Framebuffer service methods */
455 DEVMETHOD(fb_getinfo, diu_fb_getinfo),
459 static driver_t diu_driver = {
462 sizeof(struct diu_softc),
465 DRIVER_MODULE(fb, simplebus, diu_driver, 0, 0);