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 void *karo_fdt_load_dtb(void)
54 void *fdt = (void *)getenv_ulong("fdtaddr", 16, CONFIG_SYS_FDT_ADDR);
57 printf("aborting DTB load\n");
61 /* clear FDT header in memory */
64 ret = karo_load_part("dtb", fdt, MAX_DTB_SIZE);
66 printf("Failed to load dtb from flash: %d\n", ret);
70 if (fdt_check_header(fdt)) {
71 debug("No valid DTB in flash\n");
74 debug("Using DTB from flash\n");
75 karo_set_fdtsize(fdt);
79 void karo_fdt_move_fdt(void)
82 unsigned long fdt_addr = getenv_ulong("fdtaddr", 16, 0);
85 debug("DTB already loaded\n");
92 fdt_addr = CONFIG_SYS_FDT_ADDR;
93 printf("fdtaddr is not set; using default: %08lx\n",
97 fdt = karo_fdt_load_dtb();
99 fdt = (void *)gd->fdt_blob;
101 #ifdef CONFIG_OF_EMBED
102 printf("Compiled in FDT not found");
104 printf("No FDT found");
106 printf("; creating empty DTB\n");
107 fdt = (void *)fdt_addr;
108 fdt_create_empty_tree(fdt, 256);
110 printf("No DTB in flash; using default DTB\n");
112 debug("Checking FDT header @ %p\n", fdt);
113 if (fdt_check_header(fdt)) {
114 printf("ERROR: No valid DTB found at %p\n", fdt);
117 debug("Moving FDT from %p..%p to %08lx..%08lx\n",
118 fdt, fdt + fdt_totalsize(fdt) - 1,
119 fdt_addr, fdt_addr + fdt_totalsize(fdt) - 1);
120 memmove((void *)fdt_addr, fdt, fdt_totalsize(fdt));
122 set_working_fdt_addr((void *)fdt_addr);
124 karo_set_fdtsize(fdt);
127 void karo_fdt_remove_node(void *blob, const char *node)
129 int off = fdt_path_offset(blob, node);
132 debug("Removing node '%s' from DT\n", node);
135 printf("Could not find node '%s': %s\n", node,
138 ret = fdt_del_node(blob, off);
140 printf("Failed to remove node '%s': %s\n",
141 node, fdt_strerror(ret));
143 karo_set_fdtsize(blob);
146 void karo_fdt_enable_node(void *blob, const char *node, int enable)
148 int off = fdt_path_offset(blob, node);
150 debug("%sabling node '%s'\n", enable ? "En" : "Dis", node);
152 printf("Could not find node '%s': %s\n", node,
156 fdt_set_node_status(blob, off,
157 enable ? FDT_STATUS_OKAY : FDT_STATUS_DISABLED, 0);
159 karo_set_fdtsize(blob);
162 static void fdt_disable_tp_node(void *blob, const char *name)
164 int offs = fdt_node_offset_by_compatible(blob, -1, name);
167 debug("Disabling node '%s'\n", name);
168 fdt_set_node_status(blob, offs, FDT_STATUS_DISABLED, 0);
169 offs = fdt_node_offset_by_compatible(blob, offs, name);
173 void karo_fdt_fixup_touchpanel(void *blob, const char *panels[],
177 const char *model = getenv("touchpanel");
179 for (i = 0; i < num_panels; i++) {
180 const char *tp = panels[i];
183 if (strcmp(model, tp) == 0)
186 if (*tp != '\0' && strcmp(model, tp + 1) == 0)
188 tp = strpbrk(tp + 1, ",-");
193 fdt_disable_tp_node(blob, panels[i]);
195 karo_set_fdtsize(blob);
198 static int karo_fdt_disable_node_phandle(void *blob, const char *parent,
204 off = fdt_path_offset(blob, parent);
206 printf("Failed to find node '%s'\n", parent);
210 ph = fdt_getprop(blob, off, name, NULL);
212 printf("Failed to find '%s' phandle in node '%s'\n", name,
213 fdt_get_name(blob, off, NULL));
214 return -FDT_ERR_NOTFOUND;
217 off = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*ph));
219 printf("Failed to find '%s' node via phandle %04x\n",
220 name, fdt32_to_cpu(*ph));
221 return -FDT_ERR_NOTFOUND;
223 return fdt_set_node_status(blob, off, FDT_STATUS_DISABLED, 0);
226 void karo_fdt_fixup_usb_otg(void *blob, const char *node, const char *phy)
228 const char *otg_mode = getenv("otg_mode");
232 int disable_phy_pins = 1;
234 debug("OTG mode is '%s'\n", otg_mode ? otg_mode : "<UNSET>");
236 off = fdt_path_offset(blob, node);
238 debug("Failed to find node %s\n", node);
242 if (otg_mode && (strcmp(otg_mode, "device") == 0 ||
243 strcmp(otg_mode, "gadget") == 0)) {
244 debug("Setting dr_mode to 'peripheral'\n");
245 ret = fdt_setprop_string(blob, off, "dr_mode", "peripheral");
246 } else if (otg_mode && strcmp(otg_mode, "host") == 0) {
247 debug("Setting dr_mode to 'host'\n");
248 ret = fdt_setprop_string(blob, off, "dr_mode", "host");
249 disable_phy_pins = 0;
250 } else if (otg_mode && strcmp(otg_mode, "otg") == 0) {
251 debug("Setting dr_mode to 'host'\n");
252 ret = fdt_setprop_string(blob, off, "dr_mode", "otg");
254 if (otg_mode && strcmp(otg_mode, "none") != 0)
255 printf("Invalid 'otg_mode' setting '%s'; disabling usbotg port\n",
261 if ((!disable_phy_pins && !disable_otg) || ret)
264 ret = karo_fdt_disable_node_phandle(blob, node, "vbus-supply");
269 debug("Disabling usbphy\n");
270 ret = fdt_set_node_status(blob, off, FDT_STATUS_DISABLED, 0);
274 ret = karo_fdt_disable_node_phandle(blob, node, phy);
278 printf("Failed to update usbotg: %s\n", fdt_strerror(ret));
280 debug("node '%s' updated\n", node);
281 karo_set_fdtsize(blob);
284 static inline int karo_fdt_flexcan_enabled(void *blob)
286 static const char *can_ifs[] = {
292 for (i = 0; i < ARRAY_SIZE(can_ifs); i++) {
294 int off = fdt_path_offset(blob, can_ifs[i]);
297 debug("node '%s' not found\n", can_ifs[i]);
300 status = fdt_getprop(blob, off, "status", NULL);
301 if (status && strcmp(status, "okay") == 0) {
302 debug("%s is enabled\n", can_ifs[i]);
306 debug("can driver is disabled\n");
310 static inline void karo_fdt_set_lcd_pins(void *blob, const char *name)
312 int off = fdt_path_offset(blob, name);
314 const struct fdt_property *pc;
320 ph = fdt_create_phandle(blob, off);
324 off = fdt_path_offset(blob, "display");
328 pc = fdt_get_property(blob, off, "pinctrl-0", &len);
329 if (!pc || len < sizeof(ph))
332 memcpy((void *)pc->data, &ph, sizeof(ph));
333 fdt_setprop_cell(blob, off, "pinctrl-0", ph);
336 void karo_fdt_fixup_flexcan(void *blob, int xcvr_present)
339 const char *xcvr_status = "disabled";
340 const char *otg_mode = getenv("otg_mode");
343 if (karo_fdt_flexcan_enabled(blob)) {
345 debug("Changing LCD to use 23bits only\n");
346 karo_fdt_set_lcd_pins(blob, "lcdif_23bit_pins_a");
349 } else if (!is_lvds()) {
350 debug("Changing LCD to use 24bits\n");
351 karo_fdt_set_lcd_pins(blob, "lcdif_24bit_pins_a");
354 int off = fdt_path_offset(blob, "can0");
357 fdt_delprop(blob, off, "xceiver-supply");
358 off = fdt_path_offset(blob, "can1");
360 fdt_delprop(blob, off, "xceiver-supply");
362 karo_fdt_set_lcd_pins(blob, "lcdif_24bit_pins_a");
365 if (otg_mode && strcmp(otg_mode, "host") == 0)
366 karo_fdt_enable_node(blob, "can1", 0);
369 debug("Disabling CAN XCVR\n");
370 ret = fdt_find_and_setprop(blob, "reg_can_xcvr", "status",
371 xcvr_status, strlen(xcvr_status) + 1, 1);
373 printf("Failed to disable CAN transceiver switch: %s\n",
378 void karo_fdt_del_prop(void *blob, const char *compat, phys_addr_t offs,
383 const uint32_t *phandle;
386 offset = fdt_node_offset_by_compat_reg(blob, compat, offs);
390 phandle = fdt_getprop(blob, offset, prop, NULL);
392 ph = fdt32_to_cpu(*phandle);
395 debug("Removing property '%s' from node %s@%08lx\n", prop, compat, offs);
396 ret = fdt_delprop(blob, offset, prop);
398 karo_set_fdtsize(blob);
403 offset = fdt_node_offset_by_phandle(blob, ph);
407 debug("Removing node @ %08x\n", offset);
408 fdt_del_node(blob, offset);
409 karo_set_fdtsize(blob);
412 static int fdt_init_fb_mode(const void *blob, int off, struct fb_videomode *fb_mode)
414 const uint32_t *prop;
416 memset(fb_mode, 0, sizeof(*fb_mode));
418 prop = fdt_getprop(blob, off, "clock-frequency", NULL);
420 fb_mode->pixclock = KHZ2PICOS(fdt32_to_cpu(*prop) / 1000);
422 prop = fdt_getprop(blob, off, "hactive", NULL);
424 fb_mode->xres = fdt32_to_cpu(*prop);
426 prop = fdt_getprop(blob, off, "vactive", NULL);
428 fb_mode->yres = fdt32_to_cpu(*prop);
430 prop = fdt_getprop(blob, off, "hback-porch", NULL);
432 fb_mode->left_margin = fdt32_to_cpu(*prop);
434 prop = fdt_getprop(blob, off, "hsync-len", NULL);
436 fb_mode->hsync_len = fdt32_to_cpu(*prop);
438 prop = fdt_getprop(blob, off, "hfront-porch", NULL);
440 fb_mode->right_margin = fdt32_to_cpu(*prop);
442 prop = fdt_getprop(blob, off, "vback-porch", NULL);
444 fb_mode->upper_margin = fdt32_to_cpu(*prop);
446 prop = fdt_getprop(blob, off, "vsync-len", NULL);
448 fb_mode->vsync_len = fdt32_to_cpu(*prop);
450 prop = fdt_getprop(blob, off, "vfront-porch", NULL);
452 fb_mode->lower_margin = fdt32_to_cpu(*prop);
454 prop = fdt_getprop(blob, off, "hsync-active", NULL);
456 fb_mode->sync |= *prop ? FB_SYNC_VERT_HIGH_ACT : 0;
458 prop = fdt_getprop(blob, off, "vsync-active", NULL);
460 fb_mode->sync |= *prop ? FB_SYNC_VERT_HIGH_ACT : 0;
462 prop = fdt_getprop(blob, off, "de-active", NULL);
464 fb_mode->sync |= *prop ? 0 : FB_SYNC_OE_LOW_ACT;
466 prop = fdt_getprop(blob, off, "pixelclk-active", NULL);
468 fb_mode->sync |= *prop ? 0 : FB_SYNC_CLK_LAT_FALL;
473 static int fdt_update_native_fb_mode(void *blob, int off)
478 ret = fdt_increase_size(blob, 64);
480 printf("Warning: Failed to increase FDT size: %s\n",
483 debug("Creating phandle at offset %d\n", off);
484 ph = fdt_create_phandle(blob, off);
486 printf("Failed to create phandle for video timing\n");
490 debug("phandle of %s @ %06x=%04x\n", fdt_get_name(blob, off, NULL),
492 off = fdt_parent_offset(blob, off);
495 debug("parent offset=%06x\n", off);
496 ret = fdt_setprop_cell(blob, off, "native-mode", ph);
498 printf("Failed to set property 'native-mode': %s\n",
500 karo_set_fdtsize(blob);
504 static int karo_fdt_find_video_timings(void *blob)
506 int off = fdt_path_offset(blob, "display");
507 const char *subnode = "display-timings";
510 debug("Could not find node 'display' in FDT: %s\n",
515 off = fdt_subnode_offset(blob, off, subnode);
517 debug("Could not find node '%s' in FDT: %s\n", subnode,
523 int karo_fdt_get_fb_mode(void *blob, const char *name, struct fb_videomode *fb_mode)
525 int off = karo_fdt_find_video_timings(blob);
530 const char *n, *endp;
533 off = fdt_next_node(blob, off, &d);
539 debug("Skipping node @ %04x %s depth %d\n", off,
540 fdt_get_name(blob, off, NULL), d);
543 debug("parsing subnode @ %04x %s depth %d\n", off,
544 fdt_get_name(blob, off, NULL), d);
546 n = fdt_getprop(blob, off, "panel-name", &len);
548 n = fdt_get_name(blob, off, NULL);
549 if (strcasecmp(n, name) == 0) {
555 for (endp = n + len; n < endp; n += strlen(n) + 1) {
556 debug("Checking panel-name '%s'\n", n);
557 if (strcasecmp(n, name) == 0) {
558 debug("Using node %s @ %04x\n",
559 fdt_get_name(blob, off, NULL), off);
569 return fdt_init_fb_mode(blob, off, fb_mode);
574 #define SET_FB_PROP(n, v) ({ \
576 ret = fdt_setprop_u32(blob, off, n, v); \
578 printf("Failed to set property %s: %s\n", name, \
579 fdt_strerror(ret)); \
585 int karo_fdt_create_fb_mode(void *blob, const char *name,
586 struct fb_videomode *fb_mode)
588 int off = fdt_path_offset(blob, "display");
590 const char *subnode = "display-timings";
593 printf("'display' node not found in FDT\n");
597 ret = fdt_increase_size(blob, 512);
599 printf("Failed to increase FDT size: %s\n", fdt_strerror(ret));
603 ret = fdt_subnode_offset(blob, off, subnode);
605 debug("Could not find node '%s' in FDT: %s\n", subnode,
607 ret = fdt_add_subnode(blob, off, subnode);
609 printf("Failed to add %s subnode: %s\n", subnode,
615 ret = fdt_add_subnode(blob, ret, name);
617 printf("Failed to add %s subnode: %s\n", name,
623 ret = SET_FB_PROP("clock-frequency",
624 PICOS2KHZ(fb_mode->pixclock) * 1000);
627 ret = SET_FB_PROP("hactive", fb_mode->xres);
630 ret = SET_FB_PROP("vactive", fb_mode->yres);
633 ret = SET_FB_PROP("hback-porch", fb_mode->left_margin);
636 ret = SET_FB_PROP("hsync-len", fb_mode->hsync_len);
639 ret = SET_FB_PROP("hfront-porch", fb_mode->right_margin);
642 ret = SET_FB_PROP("vback-porch", fb_mode->upper_margin);
645 ret = SET_FB_PROP("vsync-len", fb_mode->vsync_len);
648 ret = SET_FB_PROP("vfront-porch", fb_mode->lower_margin);
651 ret = SET_FB_PROP("hsync-active",
652 fb_mode->sync & FB_SYNC_VERT_HIGH_ACT ? 1 : 0);
655 ret = SET_FB_PROP("vsync-active",
656 fb_mode->sync & FB_SYNC_VERT_HIGH_ACT ? 1 : 0);
659 ret = SET_FB_PROP("de-active",
660 !(fb_mode->sync & FB_SYNC_OE_LOW_ACT));
663 ret = SET_FB_PROP("pixelclk-active",
664 !(fb_mode->sync & FB_SYNC_CLK_LAT_FALL));
666 karo_set_fdtsize(blob);
670 int karo_fdt_update_fb_mode(void *blob, const char *name)
672 int off = fdt_path_offset(blob, "display");
673 const char *subnode = "display-timings";
681 debug("Disabling node '%s' at %03x\n",
682 fdt_get_name(blob, off, NULL), off);
683 ret = fdt_set_node_status(blob, off, FDT_STATUS_DISABLED, 0);
687 off = fdt_subnode_offset(blob, off, subnode);
689 debug("Could not find node '%s' in FDT: %s\n", subnode,
694 const char *n, *endp;
697 off = fdt_next_node(blob, off, &d);
703 debug("Skipping node @ %04x %s depth %d\n", off,
704 fdt_get_name(blob, off, NULL), d);
707 debug("parsing subnode @ %04x %s depth %d\n", off,
708 fdt_get_name(blob, off, NULL), d);
710 n = fdt_getprop(blob, off, "panel-name", &len);
712 n = fdt_get_name(blob, off, NULL);
713 if (strcasecmp(n, name) == 0) {
719 for (endp = n + len; n < endp; n += strlen(n) + 1) {
720 debug("Checking panel-name '%s'\n", n);
721 if (strcasecmp(n, name) == 0) {
722 debug("Using node %s @ %04x\n",
723 fdt_get_name(blob, off, NULL), off);
733 return fdt_update_native_fb_mode(blob, off);
737 #ifdef CONFIG_SYS_LVDS_IF
738 int karo_fdt_get_lcd_bus_width(const void *blob, int default_width)
740 int off = fdt_path_offset(blob, "display");
743 const uint32_t *prop;
745 prop = fdt_getprop(blob, off, "fsl,data-width", NULL);
747 return fdt32_to_cpu(*prop);
749 return default_width;
752 int karo_fdt_get_lvds_mapping(const void *blob, int default_mapping)
754 int off = fdt_path_offset(blob, "display");
759 prop = fdt_getprop(blob, off, "fsl,data-mapping", NULL);
761 return strcmp(prop, "jeida") == 0;
763 return default_mapping;
766 u8 karo_fdt_get_lvds_channels(const void *blob)
768 static const char *lvds_chans[] = {
772 u8 lvds_chan_mask = 0;
775 for (i = 0; i < ARRAY_SIZE(lvds_chans); i++) {
777 int off = fdt_path_offset(blob, lvds_chans[i]);
782 status = fdt_getprop(blob, off, "status", NULL);
783 if (status && strcmp(status, "okay") == 0) {
784 debug("%s is enabled\n", lvds_chans[i]);
785 lvds_chan_mask |= 1 << i;
788 return lvds_chan_mask;
792 int karo_fdt_get_backlight_polarity(const void *blob)
794 #ifdef CONFIG_SYS_LVDS_IF
795 const char *backlight_node = "/backlight0";
797 const char *backlight_node = "/backlight";
799 int off = fdt_path_offset(blob, "backlight"); /* first try alias */
800 const struct fdt_property *prop;
805 * if no 'backlight' alias exists try finding '/backlight0'
806 * or '/backlight' depending on LVDS or not
808 off = fdt_path_offset(blob, backlight_node);
810 printf("/backlight node not found in DT\n");
815 prop = fdt_get_property(blob, off, "pwms", &len);
817 printf("'pwms' property not found\n");
819 debug("'pwms' property has len %d\n", len);
822 if (prop && len > 3) {
823 const u32 *data = (const u32 *)prop->data;
824 return fdt32_to_cpu(data[3]) == 0;