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 printf("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 void fdt_disable_tp_node(void *blob, const char *name)
208 int offs = fdt_node_offset_by_compatible(blob, -1, name);
211 debug("Disabling node '%s'\n", name);
212 fdt_set_node_status(blob, offs, FDT_STATUS_DISABLED, 0);
213 offs = fdt_node_offset_by_compatible(blob, offs, name);
217 void karo_fdt_fixup_touchpanel(void *blob, const char *panels[],
221 const char *model = getenv("touchpanel");
223 for (i = 0; i < num_panels; i++) {
224 const char *tp = panels[i];
227 if (strcmp(model, tp) == 0)
230 if (*tp != '\0' && strcmp(model, tp + 1) == 0)
232 tp = strpbrk(tp + 1, ",-");
237 fdt_disable_tp_node(blob, panels[i]);
239 karo_set_fdtsize(blob);
242 static int karo_fdt_disable_node_phandle(void *blob, const char *parent,
248 off = fdt_path_offset(blob, parent);
250 printf("Failed to find node '%s'\n", parent);
254 ph = fdt_getprop(blob, off, name, NULL);
256 printf("Failed to find '%s' phandle in node '%s'\n", name,
257 fdt_get_name(blob, off, NULL));
258 return -FDT_ERR_NOTFOUND;
261 off = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*ph));
263 printf("Failed to find '%s' node via phandle %04x\n",
264 name, fdt32_to_cpu(*ph));
265 return -FDT_ERR_NOTFOUND;
267 return fdt_set_node_status(blob, off, FDT_STATUS_DISABLED, 0);
270 void karo_fdt_fixup_usb_otg(void *blob, const char *node, const char *phy)
272 const char *otg_mode = getenv("otg_mode");
276 int disable_phy_pins = 1;
278 debug("OTG mode is '%s'\n", otg_mode ? otg_mode : "<UNSET>");
280 off = fdt_path_offset(blob, node);
282 debug("Failed to find node %s\n", node);
286 if (otg_mode && (strcmp(otg_mode, "device") == 0 ||
287 strcmp(otg_mode, "gadget") == 0)) {
288 debug("Setting dr_mode to 'peripheral'\n");
289 ret = fdt_setprop_string(blob, off, "dr_mode", "peripheral");
290 } else if (otg_mode && strcmp(otg_mode, "host") == 0) {
291 debug("Setting dr_mode to 'host'\n");
292 ret = fdt_setprop_string(blob, off, "dr_mode", "host");
293 disable_phy_pins = 0;
294 } else if (otg_mode && strcmp(otg_mode, "otg") == 0) {
295 debug("Setting dr_mode to 'host'\n");
296 ret = fdt_setprop_string(blob, off, "dr_mode", "otg");
298 if (otg_mode && strcmp(otg_mode, "none") != 0)
299 printf("Invalid 'otg_mode' setting '%s'; disabling usbotg port\n",
305 if ((!disable_phy_pins && !disable_otg) || ret)
308 ret = karo_fdt_disable_node_phandle(blob, node, "vbus-supply");
313 debug("Disabling usbphy\n");
314 ret = fdt_set_node_status(blob, off, FDT_STATUS_DISABLED, 0);
318 ret = karo_fdt_disable_node_phandle(blob, node, phy);
322 printf("Failed to update usbotg: %s\n", fdt_strerror(ret));
324 debug("node '%s' updated\n", node);
325 karo_set_fdtsize(blob);
328 static inline int karo_fdt_flexcan_enabled(void *blob)
330 static const char *can_ifs[] = {
336 for (i = 0; i < ARRAY_SIZE(can_ifs); i++) {
338 int off = fdt_path_offset(blob, can_ifs[i]);
341 debug("node '%s' not found\n", can_ifs[i]);
344 status = fdt_getprop(blob, off, "status", NULL);
345 if (status && strcmp(status, "okay") == 0) {
346 debug("%s is enabled\n", can_ifs[i]);
350 debug("can driver is disabled\n");
354 static inline void karo_fdt_set_lcd_pins(void *blob, const char *name)
356 int off = fdt_path_offset(blob, name);
358 const struct fdt_property *pc;
364 ph = fdt_create_phandle(blob, off);
368 off = fdt_path_offset(blob, "display");
372 pc = fdt_get_property(blob, off, "pinctrl-0", &len);
373 if (!pc || len < sizeof(ph))
376 memcpy((void *)pc->data, &ph, sizeof(ph));
377 fdt_setprop_cell(blob, off, "pinctrl-0", ph);
380 void karo_fdt_fixup_flexcan(void *blob, int xcvr_present)
383 const char *xcvr_status = xcvr_present ? "disabled" : NULL;
384 const char *otg_mode = getenv("otg_mode");
386 #ifndef CONFIG_SYS_LVDS_IF
388 if (karo_fdt_flexcan_enabled(blob)) {
389 karo_fdt_set_lcd_pins(blob, "lcdif_23bit_pins_a");
392 karo_fdt_set_lcd_pins(blob, "lcdif_24bit_pins_a");
395 karo_fdt_set_lcd_pins(blob, "lcdif_24bit_pins_a");
398 if (otg_mode && strcmp(otg_mode, "host") == 0)
399 karo_fdt_enable_node(blob, "can1", 0);
402 debug("Disabling CAN XCVR\n");
403 ret = fdt_find_and_setprop(blob, "reg_can_xcvr", "status",
404 xcvr_status, strlen(xcvr_status) + 1, 1);
406 printf("Failed to disable CAN transceiver switch: %s\n",
411 void karo_fdt_del_prop(void *blob, const char *compat, phys_addr_t offs,
416 const uint32_t *phandle;
419 offset = fdt_node_offset_by_compat_reg(blob, compat, offs);
423 phandle = fdt_getprop(blob, offset, prop, NULL);
425 ph = fdt32_to_cpu(*phandle);
428 debug("Removing property '%s' from node %s@%08lx\n", prop, compat, offs);
429 ret = fdt_delprop(blob, offset, prop);
431 karo_set_fdtsize(blob);
436 offset = fdt_node_offset_by_phandle(blob, ph);
440 debug("Removing node @ %08x\n", offset);
441 fdt_del_node(blob, offset);
442 karo_set_fdtsize(blob);
445 static int fdt_init_fb_mode(const void *blob, int off, struct fb_videomode *fb_mode)
447 const uint32_t *prop;
449 memset(fb_mode, 0, sizeof(*fb_mode));
451 prop = fdt_getprop(blob, off, "clock-frequency", NULL);
453 fb_mode->pixclock = KHZ2PICOS(fdt32_to_cpu(*prop) / 1000);
455 prop = fdt_getprop(blob, off, "hactive", NULL);
457 fb_mode->xres = fdt32_to_cpu(*prop);
459 prop = fdt_getprop(blob, off, "vactive", NULL);
461 fb_mode->yres = fdt32_to_cpu(*prop);
463 prop = fdt_getprop(blob, off, "hback-porch", NULL);
465 fb_mode->left_margin = fdt32_to_cpu(*prop);
467 prop = fdt_getprop(blob, off, "hsync-len", NULL);
469 fb_mode->hsync_len = fdt32_to_cpu(*prop);
471 prop = fdt_getprop(blob, off, "hfront-porch", NULL);
473 fb_mode->right_margin = fdt32_to_cpu(*prop);
475 prop = fdt_getprop(blob, off, "vback-porch", NULL);
477 fb_mode->upper_margin = fdt32_to_cpu(*prop);
479 prop = fdt_getprop(blob, off, "vsync-len", NULL);
481 fb_mode->vsync_len = fdt32_to_cpu(*prop);
483 prop = fdt_getprop(blob, off, "vfront-porch", NULL);
485 fb_mode->lower_margin = fdt32_to_cpu(*prop);
487 prop = fdt_getprop(blob, off, "hsync-active", NULL);
489 fb_mode->sync |= *prop ? FB_SYNC_VERT_HIGH_ACT : 0;
491 prop = fdt_getprop(blob, off, "vsync-active", NULL);
493 fb_mode->sync |= *prop ? FB_SYNC_VERT_HIGH_ACT : 0;
495 prop = fdt_getprop(blob, off, "de-active", NULL);
497 fb_mode->sync |= *prop ? 0 : FB_SYNC_OE_LOW_ACT;
499 prop = fdt_getprop(blob, off, "pixelclk-active", NULL);
501 fb_mode->sync |= *prop ? 0 : FB_SYNC_CLK_LAT_FALL;
506 static int fdt_update_native_fb_mode(void *blob, int off)
511 ret = fdt_increase_size(blob, 64);
513 printf("Warning: Failed to increase FDT size: %s\n",
516 debug("Creating phandle at offset %d\n", off);
517 ph = fdt_create_phandle(blob, off);
519 printf("Failed to create phandle for video timing\n");
523 debug("phandle of %s @ %06x=%04x\n", fdt_get_name(blob, off, NULL),
525 off = fdt_parent_offset(blob, off);
528 debug("parent offset=%06x\n", off);
529 ret = fdt_setprop_cell(blob, off, "native-mode", ph);
531 printf("Failed to set property 'native-mode': %s\n",
533 karo_set_fdtsize(blob);
537 static int karo_fdt_find_video_timings(void *blob)
539 int off = fdt_path_offset(blob, "display");
540 const char *subnode = "display-timings";
543 debug("Could not find node 'display' in FDT: %s\n",
548 off = fdt_subnode_offset(blob, off, subnode);
550 debug("Could not find node '%s' in FDT: %s\n", subnode,
556 int karo_fdt_get_fb_mode(void *blob, const char *name, struct fb_videomode *fb_mode)
558 int off = karo_fdt_find_video_timings(blob);
563 const char *n, *endp;
566 off = fdt_next_node(blob, off, &d);
572 debug("Skipping node @ %04x %s depth %d\n", off,
573 fdt_get_name(blob, off, NULL), d);
576 debug("parsing subnode @ %04x %s depth %d\n", off,
577 fdt_get_name(blob, off, NULL), d);
579 n = fdt_getprop(blob, off, "panel-name", &len);
581 n = fdt_get_name(blob, off, NULL);
582 if (strcasecmp(n, name) == 0) {
588 for (endp = n + len; n < endp; n += strlen(n) + 1) {
589 debug("Checking panel-name '%s'\n", n);
590 if (strcasecmp(n, name) == 0) {
591 debug("Using node %s @ %04x\n",
592 fdt_get_name(blob, off, NULL), off);
602 return fdt_init_fb_mode(blob, off, fb_mode);
607 #define SET_FB_PROP(n, v) ({ \
609 ret = fdt_setprop_u32(blob, off, n, v); \
611 printf("Failed to set property %s: %s\n", name, \
612 fdt_strerror(ret)); \
618 int karo_fdt_create_fb_mode(void *blob, const char *name,
619 struct fb_videomode *fb_mode)
621 int off = fdt_path_offset(blob, "display");
623 const char *subnode = "display-timings";
626 printf("'display' node not found in FDT\n");
630 ret = fdt_increase_size(blob, 512);
632 printf("Failed to increase FDT size: %s\n", fdt_strerror(ret));
636 ret = fdt_subnode_offset(blob, off, subnode);
638 debug("Could not find node '%s' in FDT: %s\n", subnode,
640 ret = fdt_add_subnode(blob, off, subnode);
642 printf("Failed to add %s subnode: %s\n", subnode,
648 ret = fdt_add_subnode(blob, ret, name);
650 printf("Failed to add %s subnode: %s\n", name,
656 ret = SET_FB_PROP("clock-frequency",
657 PICOS2KHZ(fb_mode->pixclock) * 1000);
660 ret = SET_FB_PROP("hactive", fb_mode->xres);
663 ret = SET_FB_PROP("vactive", fb_mode->yres);
666 ret = SET_FB_PROP("hback-porch", fb_mode->left_margin);
669 ret = SET_FB_PROP("hsync-len", fb_mode->hsync_len);
672 ret = SET_FB_PROP("hfront-porch", fb_mode->right_margin);
675 ret = SET_FB_PROP("vback-porch", fb_mode->upper_margin);
678 ret = SET_FB_PROP("vsync-len", fb_mode->vsync_len);
681 ret = SET_FB_PROP("vfront-porch", fb_mode->lower_margin);
684 ret = SET_FB_PROP("hsync-active",
685 fb_mode->sync & FB_SYNC_VERT_HIGH_ACT ? 1 : 0);
688 ret = SET_FB_PROP("vsync-active",
689 fb_mode->sync & FB_SYNC_VERT_HIGH_ACT ? 1 : 0);
692 ret = SET_FB_PROP("de-active",
693 !(fb_mode->sync & FB_SYNC_OE_LOW_ACT));
696 ret = SET_FB_PROP("pixelclk-active",
697 !(fb_mode->sync & FB_SYNC_CLK_LAT_FALL));
699 karo_set_fdtsize(blob);
703 int karo_fdt_update_fb_mode(void *blob, const char *name)
705 int off = fdt_path_offset(blob, "display");
706 const char *subnode = "display-timings";
714 debug("Disabling node '%s' at %03x\n",
715 fdt_get_name(blob, off, NULL), off);
716 ret = fdt_set_node_status(blob, off, FDT_STATUS_DISABLED, 0);
720 off = fdt_subnode_offset(blob, off, subnode);
722 debug("Could not find node '%s' in FDT: %s\n", subnode,
727 const char *n, *endp;
730 off = fdt_next_node(blob, off, &d);
736 debug("Skipping node @ %04x %s depth %d\n", off,
737 fdt_get_name(blob, off, NULL), d);
740 debug("parsing subnode @ %04x %s depth %d\n", off,
741 fdt_get_name(blob, off, NULL), d);
743 n = fdt_getprop(blob, off, "panel-name", &len);
745 n = fdt_get_name(blob, off, NULL);
746 if (strcasecmp(n, name) == 0) {
752 for (endp = n + len; n < endp; n += strlen(n) + 1) {
753 debug("Checking panel-name '%s'\n", n);
754 if (strcasecmp(n, name) == 0) {
755 debug("Using node %s @ %04x\n",
756 fdt_get_name(blob, off, NULL), off);
766 return fdt_update_native_fb_mode(blob, off);
770 int karo_fdt_get_lcd_bus_width(const void *blob, int default_width)
772 int off = fdt_path_offset(blob, "display");
775 const uint32_t *prop;
777 prop = fdt_getprop(blob, off, "fsl,data-width", NULL);
779 return fdt32_to_cpu(*prop);
781 return default_width;
784 int karo_fdt_get_lvds_mapping(const void *blob, int default_mapping)
786 int off = fdt_path_offset(blob, "display");
791 prop = fdt_getprop(blob, off, "fsl,data-mapping", NULL);
793 return strcmp(prop, "jeida") == 0;
795 return default_mapping;
798 u8 karo_fdt_get_lvds_channels(const void *blob)
800 static const char *lvds_chans[] = {
804 u8 lvds_chan_mask = 0;
807 for (i = 0; i < ARRAY_SIZE(lvds_chans); i++) {
809 int off = fdt_path_offset(blob, lvds_chans[i]);
814 status = fdt_getprop(blob, off, "status", NULL);
815 if (status && strcmp(status, "okay") == 0) {
816 debug("%s is enabled\n", lvds_chans[i]);
817 lvds_chan_mask |= 1 << i;
820 return lvds_chan_mask;