1 /* $NetBSD: simplefb.c,v 1.15 2021/08/30 22:47:24 jmcneill Exp $ */
2
3 /*-
4 * Copyright (c) 2017 Jared McNeill <jmcneill@invisible.ca>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include "opt_wsdisplay_compat.h"
30
31 #include <sys/cdefs.h>
32 __KERNEL_RCSID(0, "$NetBSD: simplefb.c,v 1.15 2021/08/30 22:47:24 jmcneill Exp $");
33
34 #include <sys/param.h>
35 #include <sys/bus.h>
36 #include <sys/device.h>
37 #include <sys/systm.h>
38
39 #include <dev/fdt/fdtvar.h>
40
41 #include <dev/wsfb/genfbvar.h>
42
43 static const struct device_compatible_entry compat_data[] = {
44 { .compat = "simple-framebuffer" },
45 DEVICE_COMPAT_EOL
46 };
47
48 struct simplefb_softc {
49 struct genfb_softc sc_gen;
50 bus_space_tag_t sc_bst;
51 bus_space_handle_t sc_bsh;
52 int sc_phandle;
53
54 bus_addr_t sc_paddr;
55 };
56
57 static int simplefb_console_phandle = -1;
58
59 static bool
simplefb_shutdown(device_t self,int flags)60 simplefb_shutdown(device_t self, int flags)
61 {
62 genfb_enable_polling(self);
63 return true;
64 }
65
66 static int
simplefb_ioctl(void * v,void * vs,u_long cmd,void * data,int flag,lwp_t * l)67 simplefb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, lwp_t *l)
68 {
69 struct simplefb_softc * const sc = v;
70 struct wsdisplayio_bus_id *busid;
71 struct wsdisplayio_fbinfo *fbi;
72 struct rasops_info *ri;
73 u_int video;
74 int error;
75
76 switch (cmd) {
77 case WSDISPLAYIO_GTYPE:
78 *(u_int *)data = WSDISPLAY_TYPE_GENFB;
79 return 0;
80 case WSDISPLAYIO_GET_BUSID:
81 busid = data;
82 busid->bus_type = WSDISPLAYIO_BUS_SOC;
83 return 0;
84 case WSDISPLAYIO_GET_FBINFO:
85 fbi = data;
86 ri = &sc->sc_gen.vd.active->scr_ri;
87 error = wsdisplayio_get_fbinfo(ri, fbi);
88 if (error == 0) {
89 /*
90 * XXX
91 * if the fb isn't page aligned, tell wsfb to skip the
92 * unaligned part
93 */
94 fbi->fbi_fboffset = sc->sc_paddr & PAGE_MASK;
95 fbi->fbi_flags |= WSFB_VRAM_IS_RAM;
96 }
97 return error;
98 case WSDISPLAYIO_SVIDEO:
99 video = *(u_int *)data;
100 if (video == WSDISPLAYIO_VIDEO_OFF)
101 pmf_event_inject(NULL, PMFE_DISPLAY_OFF);
102 else if (video == WSDISPLAYIO_VIDEO_ON)
103 pmf_event_inject(NULL, PMFE_DISPLAY_ON);
104 else
105 return EINVAL;
106 return 0;
107 default:
108 return EPASSTHROUGH;
109 }
110 }
111
112 static paddr_t
simplefb_mmap(void * v,void * vs,off_t off,int prot)113 simplefb_mmap(void *v, void *vs, off_t off, int prot)
114 {
115 struct simplefb_softc * const sc = v;
116
117 if (off < 0 || off >= (sc->sc_paddr & PAGE_MASK) +
118 sc->sc_gen.sc_fbsize)
119 return -1;
120
121 return bus_space_mmap(sc->sc_bst, trunc_page(sc->sc_paddr), off, prot,
122 BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE);
123 }
124
125 static int
simplefb_attach_genfb(struct simplefb_softc * sc)126 simplefb_attach_genfb(struct simplefb_softc *sc)
127 {
128 device_t dev = sc->sc_gen.sc_dev;
129 prop_dictionary_t dict = device_properties(dev);
130 const int phandle = sc->sc_phandle;
131 struct genfb_ops ops;
132 uint32_t width, height, stride;
133 uint16_t depth;
134 const char *format;
135 uint64_t sfb_addr;
136 bus_addr_t addr;
137 bus_size_t size;
138
139 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
140 aprint_error(": couldn't get registers\n");
141 return ENXIO;
142 }
143
144 if (size == 0) {
145 aprint_naive("\n");
146 aprint_normal(": disabled\n");
147 return ENXIO;
148 }
149
150 if (of_getprop_uint32(phandle, "width", &width) != 0 ||
151 of_getprop_uint32(phandle, "height", &height) != 0 ||
152 of_getprop_uint32(phandle, "stride", &stride) != 0 ||
153 (format = fdtbus_get_string(phandle, "format")) == NULL) {
154 aprint_error(": missing property in DT\n");
155 return ENXIO;
156 }
157
158 if (strcmp(format, "a8b8g8r8") == 0 ||
159 strcmp(format, "x8r8g8b8") == 0) {
160 depth = 32;
161 } else if (strcmp(format, "r8g8b8a8") == 0 ||
162 strcmp(format, "b8g8r8x8") == 0) {
163 depth = 32;
164 prop_dictionary_set_bool(dict, "is_swapped", true);
165 } else if (strcmp(format, "x2r10g10b10") == 0) {
166 depth = 32;
167 prop_dictionary_set_bool(dict, "is_10bit", true);
168 } else if (strcmp(format, "r5g6b5") == 0) {
169 depth = 16;
170 } else {
171 aprint_error(": unsupported format '%s'\n", format);
172 return ENXIO;
173 }
174
175 if (size < stride * height) {
176 aprint_error(": incorrect size\n");
177 return ENXIO;
178 }
179
180 /* Device may have been reconfigured. MD code will tell us. */
181 if (prop_dictionary_get_uint64(dict, "simplefb-physaddr", &sfb_addr) &&
182 sfb_addr != 0) {
183 addr = (bus_addr_t)sfb_addr;
184 }
185
186 if (bus_space_map(sc->sc_bst, addr, size,
187 BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE,
188 &sc->sc_bsh) != 0) {
189 aprint_error(": failed to map fb\n");
190 return ENXIO;
191 }
192
193 sc->sc_paddr = addr;
194
195 prop_dictionary_set_uint32(dict, "width", width);
196 prop_dictionary_set_uint32(dict, "height", height);
197 prop_dictionary_set_uint8(dict, "depth", depth);
198 prop_dictionary_set_uint16(dict, "linebytes", stride);
199 prop_dictionary_set_uint32(dict, "address", addr);
200 prop_dictionary_set_uint64(dict, "virtual_address",
201 (uintptr_t)bus_space_vaddr(sc->sc_bst, sc->sc_bsh));
202
203 genfb_init(&sc->sc_gen);
204
205 if (sc->sc_gen.sc_width == 0 || sc->sc_gen.sc_fbsize == 0) {
206 aprint_normal(": disabled\n");
207 return ENXIO;
208 }
209
210 aprint_naive("\n");
211 aprint_normal(": Simple Framebuffer (%ux%u %u-bpp @ 0x%" PRIxBUSADDR ")\n",
212 width, height, depth, addr);
213
214 pmf_device_register1(dev, NULL, NULL, simplefb_shutdown);
215
216 memset(&ops, 0, sizeof(ops));
217 ops.genfb_ioctl = simplefb_ioctl;
218 ops.genfb_mmap = simplefb_mmap;
219
220 #ifdef WSDISPLAY_MULTICONS
221 const bool is_console = true;
222 genfb_cnattach();
223 #else
224 const bool is_console = phandle == simplefb_console_phandle;
225 if (is_console)
226 aprint_normal_dev(sc->sc_gen.sc_dev,
227 "switching to framebuffer console\n");
228 #endif
229
230 prop_dictionary_set_bool(dict, "is_console", is_console);
231
232 genfb_attach(&sc->sc_gen, &ops);
233
234 return 0;
235 }
236
237 static int
simplefb_match(device_t parent,cfdata_t cf,void * aux)238 simplefb_match(device_t parent, cfdata_t cf, void *aux)
239 {
240 struct fdt_attach_args * const faa = aux;
241
242 return of_compatible_match(faa->faa_phandle, compat_data);
243 }
244
245 static void
simplefb_attach(device_t parent,device_t self,void * aux)246 simplefb_attach(device_t parent, device_t self, void *aux)
247 {
248 struct simplefb_softc * const sc = device_private(self);
249 struct fdt_attach_args * const faa = aux;
250 const int phandle = faa->faa_phandle;
251
252 sc->sc_gen.sc_dev = self;
253 sc->sc_phandle = phandle;
254 sc->sc_bst = faa->faa_bst;
255
256 if (simplefb_attach_genfb(sc) != 0)
257 return;
258 }
259
260 CFATTACH_DECL_NEW(simplefb, sizeof(struct simplefb_softc),
261 simplefb_match, simplefb_attach, NULL, NULL);
262
263 static int
simplefb_console_match(int phandle)264 simplefb_console_match(int phandle)
265 {
266 return of_compatible_match(phandle, compat_data);
267 }
268
269 static void
simplefb_console_consinit(struct fdt_attach_args * faa,u_int uart_freq)270 simplefb_console_consinit(struct fdt_attach_args *faa, u_int uart_freq)
271 {
272 simplefb_console_phandle = faa->faa_phandle;
273 genfb_cnattach();
274 }
275
276 static const struct fdt_console simplefb_fdt_console = {
277 .match = simplefb_console_match,
278 .consinit = simplefb_console_consinit
279 };
280
281 FDT_CONSOLE(simplefb, &simplefb_fdt_console);
282