2 * (C) Copyright 2012,2013 Lothar Waßmann <LW@KARO-electronics.de>
4 * See file CREDITS for list of people who contributed to this
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * version 2 as published by the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
21 #include <fdt_support.h>
24 #include <linux/list.h>
26 #include <jffs2/load_kernel.h>
31 #ifdef CONFIG_MAX_DTB_SIZE
32 #define MAX_DTB_SIZE CONFIG_MAX_DTB_SIZE
34 #define MAX_DTB_SIZE SZ_64K
37 DECLARE_GLOBAL_DATA_PTR;
39 static void karo_set_fdtsize(void *fdt)
41 size_t fdtsize = getenv_ulong("fdtsize", 16, 0);
43 if (fdtsize == fdt_totalsize(fdt)) {
46 debug("FDT size changed from %u to %u\n",
47 fdtsize, fdt_totalsize(fdt));
48 setenv_hex("fdtsize", fdt_totalsize(fdt));
51 static int karo_load_part(const char *part, void *addr, size_t len)
54 struct mtd_device *dev;
55 struct part_info *part_info;
59 debug("Initializing mtd_parts\n");
60 ret = mtdparts_init();
64 debug("Trying to find NAND partition '%s'\n", part);
65 ret = find_dev_and_part(part, &dev, &part_num, &part_info);
67 printf("Failed to find flash partition '%s': %d\n",
72 debug("Found partition '%s': offset=%08x size=%08x\n",
73 part, part_info->offset, part_info->size);
74 if (part_info->size < len) {
75 printf("Warning: partition '%s' smaller than requested size: %u; truncating data to %u byte\n",
76 part, len, part_info->size);
77 len = part_info->size;
79 debug("Reading NAND partition '%s' to %p\n", part, addr);
80 ret = nand_read_skip_bad(&nand_info[0], part_info->offset, &len,
83 printf("Failed to load partition '%s' to %p\n", part, addr);
87 printf("Read only %u of %u bytes due to bad blocks\n",
90 debug("Read %u byte from partition '%s' @ offset %08x\n",
91 len, part, part_info->offset);
95 static void *karo_fdt_load_dtb(void)
98 void *fdt = (void *)getenv_ulong("fdtaddr", 16, CONFIG_SYS_FDT_ADDR);
101 debug("aborting DTB load\n");
105 /* clear FDT header in memory */
108 ret = karo_load_part("dtb", fdt, MAX_DTB_SIZE);
110 printf("Failed to load dtb from flash: %d\n", ret);
114 if (fdt_check_header(fdt)) {
115 debug("No valid DTB in flash\n");
118 debug("Using DTB from flash\n");
119 karo_set_fdtsize(fdt);
123 void karo_fdt_move_fdt(void)
126 unsigned long fdt_addr = getenv_ulong("fdtaddr", 16, 0);
129 debug("DTB already loaded\n");
133 setenv("fdtsize", 0);
136 fdt_addr = CONFIG_SYS_FDT_ADDR;
137 printf("fdtaddr is not set; using default: %08lx\n",
141 fdt = karo_fdt_load_dtb();
143 fdt = (void *)gd->fdt_blob;
145 #ifdef CONFIG_OF_EMBED
146 printf("Compiled in FDT not found");
148 printf("No FDT found");
150 printf("; creating empty DTB\n");
151 fdt = (void *)fdt_addr;
152 fdt_create_empty_tree(fdt, 256);
154 printf("No DTB in flash; using default DTB\n");
156 debug("Checking FDT header @ %p\n", fdt);
157 if (fdt_check_header(fdt)) {
158 printf("ERROR: No valid DTB found at %p\n", fdt);
161 debug("Moving FDT from %p..%p to %08lx..%08lx\n",
162 fdt, fdt + fdt_totalsize(fdt) - 1,
163 fdt_addr, fdt_addr + fdt_totalsize(fdt) - 1);
164 memmove((void *)fdt_addr, fdt, fdt_totalsize(fdt));
166 set_working_fdt_addr((void *)fdt_addr);
168 karo_set_fdtsize(fdt);
171 void karo_fdt_remove_node(void *blob, const char *node)
173 int off = fdt_path_offset(blob, node);
176 debug("Removing node '%s' from DT\n", node);
179 printf("Could not find node '%s': %s\n", node,
182 ret = fdt_del_node(blob, off);
184 printf("Failed to remove node '%s': %s\n",
185 node, fdt_strerror(ret));
187 karo_set_fdtsize(blob);
190 void karo_fdt_enable_node(void *blob, const char *node, int enable)
192 int off = fdt_path_offset(blob, node);
194 debug("%sabling node '%s'\n", enable ? "En" : "Dis", node);
196 printf("Could not find node '%s': %s\n", node,
200 fdt_set_node_status(blob, off,
201 enable ? FDT_STATUS_OKAY : FDT_STATUS_DISABLED, 0);
203 karo_set_fdtsize(blob);
206 static const char *karo_touchpanels[] = {
214 static void fdt_disable_tp_node(void *blob, const char *name)
216 int offs = fdt_node_offset_by_compatible(blob, -1, name);
219 debug("node '%s' not found: %s\n", name, fdt_strerror(offs));
223 debug("Disabling node '%s'\n", name);
224 fdt_set_node_status(blob, offs, FDT_STATUS_DISABLED, 0);
227 void karo_fdt_fixup_touchpanel(void *blob)
230 const char *model = getenv("touchpanel");
232 for (i = 0; i < ARRAY_SIZE(karo_touchpanels); i++) {
233 const char *tp = karo_touchpanels[i];
235 if (model != NULL && strcmp(model, tp) == 0)
239 if (strcmp(model, tp) == 0)
241 tp = strchr(tp, ',');
242 if (tp != NULL && *tp != '\0' && strcmp(model, tp + 1) == 0)
245 fdt_disable_tp_node(blob, karo_touchpanels[i]);
247 karo_set_fdtsize(blob);
250 void karo_fdt_fixup_usb_otg(void *blob, const char *node, const char *phy)
252 const char *otg_mode = getenv("otg_mode");
257 int disable_phy_pins = 1;
259 debug("OTG mode is '%s'\n", otg_mode ? otg_mode : "<UNSET>");
261 off = fdt_path_offset(blob, node);
263 debug("Failed to find node %s\n", node);
267 if (otg_mode && (strcmp(otg_mode, "device") == 0 ||
268 strcmp(otg_mode, "gadget") == 0)) {
269 debug("Setting dr_mode to 'peripheral'\n");
270 ret = fdt_setprop_string(blob, off, "dr_mode", "peripheral");
271 } else if (otg_mode && strcmp(otg_mode, "host") == 0) {
272 debug("Setting dr_mode to 'host'\n");
273 ret = fdt_setprop_string(blob, off, "dr_mode", "host");
274 disable_phy_pins = 0;
275 } else if (otg_mode && strcmp(otg_mode, "otg") == 0) {
276 debug("Setting dr_mode to 'host'\n");
277 ret = fdt_setprop_string(blob, off, "dr_mode", "otg");
279 if (otg_mode && strcmp(otg_mode, "none") != 0)
280 printf("Invalid 'otg_mode' setting '%s'; disabling usbotg port\n",
286 if ((!disable_phy_pins && !disable_otg) || ret)
290 ret = fdt_set_node_status(blob, off, FDT_STATUS_DISABLED, 0);
295 ph = fdt_getprop(blob, off, phy, NULL);
297 printf("Failed to find '%s' phandle in node '%s'\n", phy,
298 fdt_get_name(blob, off, NULL));
302 off = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*ph));
304 printf("Failed to find '%s' node via phandle %04x\n",
305 phy, fdt32_to_cpu(*ph));
310 debug("Disabling usbphy\n");
311 ret = fdt_set_node_status(blob, off, FDT_STATUS_DISABLED, 0);
315 printf("Failed to update usbotg: %s\n", fdt_strerror(ret));
317 debug("node '%s' updated\n", node);
318 karo_set_fdtsize(blob);
321 static int karo_fdt_flexcan_enabled(void *blob)
323 const char *can_ifs[] = {
329 for (i = 0; i < ARRAY_SIZE(can_ifs); i++) {
331 int off = fdt_path_offset(blob, can_ifs[i]);
334 debug("node '%s' not found\n", can_ifs[i]);
337 status = fdt_getprop(blob, off, "status", NULL);
338 if (status && strcmp(status, "okay") == 0) {
339 debug("%s is enabled\n", can_ifs[i]);
343 debug("can driver is disabled\n");
347 static void karo_fdt_set_lcd_pins(void *blob, const char *name)
349 int off = fdt_path_offset(blob, name);
351 const struct fdt_property *pc;
357 ph = fdt_create_phandle(blob, off);
361 off = fdt_path_offset(blob, "display");
365 pc = fdt_get_property(blob, off, "pinctrl-0", &len);
366 if (!pc || len < sizeof(ph))
369 memcpy((void *)pc->data, &ph, sizeof(ph));
370 fdt_setprop_cell(blob, off, "pinctrl-0", ph);
373 void karo_fdt_fixup_flexcan(void *blob, int xcvr_present)
375 const char *xcvr_status = "disabled";
378 if (karo_fdt_flexcan_enabled(blob)) {
379 karo_fdt_set_lcd_pins(blob, "lcdif_23bit_pins_a");
380 xcvr_status = "okay";
382 karo_fdt_set_lcd_pins(blob, "lcdif_24bit_pins_a");
385 const char *otg_mode = getenv("otg_mode");
387 if (otg_mode && (strcmp(otg_mode, "host") == 0))
388 karo_fdt_enable_node(blob, "can1", 0);
390 karo_fdt_set_lcd_pins(blob, "lcdif_24bit_pins_a");
392 fdt_find_and_setprop(blob, "/regulators/can-xcvr", "status",
393 xcvr_status, strlen(xcvr_status) + 1, 1);
396 void karo_fdt_del_prop(void *blob, const char *compat, phys_addr_t offs,
401 const uint32_t *phandle;
404 offset = fdt_node_offset_by_compat_reg(blob, compat, offs);
408 phandle = fdt_getprop(blob, offset, prop, NULL);
410 ph = fdt32_to_cpu(*phandle);
413 debug("Removing property '%s' from node %s@%08lx\n", prop, compat, offs);
414 ret = fdt_delprop(blob, offset, prop);
416 karo_set_fdtsize(blob);
421 offset = fdt_node_offset_by_phandle(blob, ph);
425 debug("Removing node @ %08x\n", offset);
426 fdt_del_node(blob, offset);
427 karo_set_fdtsize(blob);
430 static int fdt_init_fb_mode(const void *blob, int off, struct fb_videomode *fb_mode)
432 const uint32_t *prop;
434 memset(fb_mode, 0, sizeof(*fb_mode));
436 prop = fdt_getprop(blob, off, "clock-frequency", NULL);
438 fb_mode->pixclock = KHZ2PICOS(fdt32_to_cpu(*prop) / 1000);
440 prop = fdt_getprop(blob, off, "hactive", NULL);
442 fb_mode->xres = fdt32_to_cpu(*prop);
444 prop = fdt_getprop(blob, off, "vactive", NULL);
446 fb_mode->yres = fdt32_to_cpu(*prop);
448 prop = fdt_getprop(blob, off, "hback-porch", NULL);
450 fb_mode->left_margin = fdt32_to_cpu(*prop);
452 prop = fdt_getprop(blob, off, "hsync-len", NULL);
454 fb_mode->hsync_len = fdt32_to_cpu(*prop);
456 prop = fdt_getprop(blob, off, "hfront-porch", NULL);
458 fb_mode->right_margin = fdt32_to_cpu(*prop);
460 prop = fdt_getprop(blob, off, "vback-porch", NULL);
462 fb_mode->upper_margin = fdt32_to_cpu(*prop);
464 prop = fdt_getprop(blob, off, "vsync-len", NULL);
466 fb_mode->vsync_len = fdt32_to_cpu(*prop);
468 prop = fdt_getprop(blob, off, "vfront-porch", NULL);
470 fb_mode->lower_margin = fdt32_to_cpu(*prop);
472 prop = fdt_getprop(blob, off, "hsync-active", NULL);
474 fb_mode->sync |= *prop ? FB_SYNC_VERT_HIGH_ACT : 0;
476 prop = fdt_getprop(blob, off, "vsync-active", NULL);
478 fb_mode->sync |= *prop ? FB_SYNC_VERT_HIGH_ACT : 0;
480 prop = fdt_getprop(blob, off, "de-active", NULL);
482 fb_mode->sync |= *prop ? 0 : FB_SYNC_OE_LOW_ACT;
484 prop = fdt_getprop(blob, off, "pixelclk-active", NULL);
486 fb_mode->sync |= *prop ? 0 : FB_SYNC_CLK_LAT_FALL;
491 static int fdt_update_native_fb_mode(void *blob, int off)
496 ret = fdt_increase_size(blob, 64);
498 printf("Warning: Failed to increase FDT size: %s\n",
501 debug("Creating phandle at offset %d\n", off);
502 ph = fdt_create_phandle(blob, off);
504 printf("Failed to create phandle for video timing\n");
508 debug("phandle of %s @ %06x=%04x\n", fdt_get_name(blob, off, NULL),
510 off = fdt_parent_offset(blob, off);
513 debug("parent offset=%06x\n", off);
514 ret = fdt_setprop_cell(blob, off, "native-mode", ph);
516 printf("Failed to set property 'native-mode': %s\n",
518 karo_set_fdtsize(blob);
522 static int karo_fdt_find_video_timings(void *blob)
524 int off = fdt_path_offset(blob, "display");
525 const char *subnode = "display-timings";
528 debug("Could not find node 'display' in FDT: %s\n",
533 off = fdt_subnode_offset(blob, off, subnode);
535 debug("Could not find node '%s' in FDT: %s\n", subnode,
541 int karo_fdt_get_fb_mode(void *blob, const char *name, struct fb_videomode *fb_mode)
543 int off = karo_fdt_find_video_timings(blob);
548 const char *n, *endp;
551 off = fdt_next_node(blob, off, &d);
557 debug("Skipping node @ %04x %s depth %d\n", off,
558 fdt_get_name(blob, off, NULL), d);
561 debug("parsing subnode @ %04x %s depth %d\n", off,
562 fdt_get_name(blob, off, NULL), d);
564 n = fdt_getprop(blob, off, "panel-name", &len);
566 n = fdt_get_name(blob, off, NULL);
567 if (strcasecmp(n, name) == 0) {
573 for (endp = n + len; n < endp; n += strlen(n) + 1) {
574 debug("Checking panel-name '%s'\n", n);
575 if (strcasecmp(n, name) == 0) {
576 debug("Using node %s @ %04x\n",
577 fdt_get_name(blob, off, NULL), off);
587 return fdt_init_fb_mode(blob, off, fb_mode);
592 #define SET_FB_PROP(n, v) ({ \
594 ret = fdt_setprop_u32(blob, off, n, v); \
596 printf("Failed to set property %s: %s\n", name, \
597 fdt_strerror(ret)); \
603 int karo_fdt_create_fb_mode(void *blob, const char *name,
604 struct fb_videomode *fb_mode)
606 int off = fdt_path_offset(blob, "display");
608 const char *subnode = "display-timings";
611 printf("'display' node not found in FDT\n");
615 ret = fdt_increase_size(blob, 512);
617 printf("Failed to increase FDT size: %s\n", fdt_strerror(ret));
621 ret = fdt_subnode_offset(blob, off, subnode);
623 debug("Could not find node '%s' in FDT: %s\n", subnode,
625 ret = fdt_add_subnode(blob, off, subnode);
627 printf("Failed to add %s subnode: %s\n", subnode,
633 ret = fdt_add_subnode(blob, ret, name);
635 printf("Failed to add %s subnode: %s\n", name,
641 ret = SET_FB_PROP("clock-frequency",
642 PICOS2KHZ(fb_mode->pixclock) * 1000);
645 ret = SET_FB_PROP("hactive", fb_mode->xres);
648 ret = SET_FB_PROP("vactive", fb_mode->yres);
651 ret = SET_FB_PROP("hback-porch", fb_mode->left_margin);
654 ret = SET_FB_PROP("hsync-len", fb_mode->hsync_len);
657 ret = SET_FB_PROP("hfront-porch", fb_mode->right_margin);
660 ret = SET_FB_PROP("vback-porch", fb_mode->upper_margin);
663 ret = SET_FB_PROP("vsync-len", fb_mode->vsync_len);
666 ret = SET_FB_PROP("vfront-porch", fb_mode->lower_margin);
669 ret = SET_FB_PROP("hsync-active",
670 fb_mode->sync & FB_SYNC_VERT_HIGH_ACT ? 1 : 0);
673 ret = SET_FB_PROP("vsync-active",
674 fb_mode->sync & FB_SYNC_VERT_HIGH_ACT ? 1 : 0);
677 ret = SET_FB_PROP("de-active",
678 !(fb_mode->sync & FB_SYNC_OE_LOW_ACT));
681 ret = SET_FB_PROP("pixelclk-active",
682 !(fb_mode->sync & FB_SYNC_CLK_LAT_FALL));
684 karo_set_fdtsize(blob);
688 static int karo_fdt_set_display_alias(void *blob, const char *path,
693 size_t size = strlen(path) + strlen(name) + 2;
696 display = malloc(size);
697 if (display == NULL) {
698 printf("%s: Failed to allocate buffer\n", __func__);
701 sprintf(display, "%s/%s", path, name);
702 if (strlen(display) != size - 1)
704 off = fdt_path_offset(blob, "/aliases");
705 if (off == FDT_ERR_BADMAGIC)
707 ret = fdt_resize(blob);
709 printf("%s: Failed to resize FDT: %s\n",
710 __func__, fdt_strerror(ret));
713 off = fdt_add_subnode(blob, 0, "aliases");
715 printf("%s: Failed to create 'aliases' node: %s\n",
716 __func__, fdt_strerror(off));
720 ret = fdt_setprop_string(blob, off, "display", display);
721 debug("setprop_string(display='%s') returned %d (%s)\n", display, ret,
722 ret < 0 ? fdt_strerror(ret) : "OK");
726 const char *karo_fdt_set_display(const char *video_mode, const char *lcd_path,
727 const char *lvds_path)
729 const char *vmode = NULL;
731 void *blob = working_fdt;
733 if (video_mode == NULL || strlen(video_mode) == 0)
736 vmode = strchr(video_mode, ':');
738 if (lvds_path == NULL)
739 return vmode ? vmode + 1 : video_mode;
741 if (lvds_path != NULL && vmode != NULL) {
742 if (strncmp(video_mode, "LVDS:", 5) == 0 ||
743 strncmp(video_mode, "LVDS0:", 6) == 0) {
744 ret = karo_fdt_set_display_alias(blob, lvds_path,
746 } else if (strncmp(video_mode, "LVDS1:", 6) == 0) {
747 ret = karo_fdt_set_display_alias(blob, lvds_path,
750 debug("%s: Syntax error in video_mode\n", __func__);
753 video_mode = vmode + 1;
757 ret = karo_fdt_set_display_alias(blob, lcd_path,
760 off = fdt_path_offset(blob, "lvds0");
762 ret = fdt_set_node_status(blob, off,
763 FDT_STATUS_DISABLED, 0);
765 off = fdt_path_offset(blob, "lvds1");
767 ret = fdt_set_node_status(blob, off,
768 FDT_STATUS_DISABLED, 0);
772 printf("%s: failed to set 'display' alias: %s\n",
773 __func__, fdt_strerror(ret));
778 int karo_fdt_update_fb_mode(void *blob, const char *name)
780 int off = fdt_path_offset(blob, "display");
781 const char *subnode = "display-timings";
789 debug("Disabling node '%s' at %03x\n",
790 fdt_get_name(blob, off, NULL), off);
791 ret = fdt_set_node_status(blob, off, FDT_STATUS_DISABLED, 0);
795 off = fdt_subnode_offset(blob, off, subnode);
797 debug("Could not find node '%s' in FDT: %s\n", subnode,
802 const char *n, *endp;
805 off = fdt_next_node(blob, off, &d);
811 debug("Skipping node @ %04x %s depth %d\n", off,
812 fdt_get_name(blob, off, NULL), d);
815 debug("parsing subnode @ %04x %s depth %d\n", off,
816 fdt_get_name(blob, off, NULL), d);
818 n = fdt_getprop(blob, off, "panel-name", &len);
820 n = fdt_get_name(blob, off, NULL);
821 if (strcasecmp(n, name) == 0) {
827 for (endp = n + len; n < endp; n += strlen(n) + 1) {
828 debug("Checking panel-name '%s'\n", n);
829 if (strcasecmp(n, name) == 0) {
830 debug("Using node %s @ %04x\n",
831 fdt_get_name(blob, off, NULL), off);
841 return fdt_update_native_fb_mode(blob, off);