highbank: use the provided dtb by the firmware to probe barebox device and mem size

the dtb is at 0x1000

if no dtb present use C code device

keep in C the timer/gpio/uart

have a nice tree

barebox 2013.02.0-00294-g6802ddf #124 Wed Feb 13 02:31:01 CST 2013

Board: Calxeda Highbank
memory: ram0: 0xff900000@0x0
highbank: dtb probed memory size
registered netconsole as cs1
malloc space: 0x03500000 -> 0x03efffff (size 10 MiB)
Open /dev/env0 No such file or directory
no valid environment found on /dev/env0. Using default environment
running /env/bin/init...
ahci ffe08000.sata: port 0: SATA link ok
ahci ffe08000.sata: port 0: Spinning up device...
ahci ffe08000.sata: port 0: ok.
ahci ffe08000.sata: registered /dev/ata0
eth0: got preset MAC address: 52:54:00:12:34:56
eth1: got preset MAC address: 52:54:00:12:34:57

Hit any key to stop autoboot:  3
[barebox@Calxeda Highbank]:/
 # devinfo
devices:
`---- platform
     `---- mem0
          `---- 0x00000000-0x3fffffff: /dev/ram0
          `---- 0x00001000-0x00010fff: /dev/dtb
     `---- mem1
          `---- 0x00000000-0x000051af: /dev/defaultenv
     `---- mem2
          `---- 0x00000000-0xfffffffe: /dev/mem
     `---- cs1
     `---- fff10600.timer
     `---- fff10620.watchdog
     `---- fff11000.interrupt-controller
     `---- l2-cache
     `---- ffe08000.sata
          `---- 0x00000000-0x3fffffff: /dev/ata0
          `---- 0x00100000-0x014fffff: /dev/ata0.0
          `---- 0x01500000-0x3fffffff: /dev/ata0.1
     `---- ffe0e000.sdhci
     `---- fff00000.memory-controller
     `---- mem3
     `---- fff3c000.sregs
     `---- fff3c200.sregs
     `---- fff50000.ethernet
          `---- eth0
     `---- fff51000.ethernet
          `---- eth1
`---- amba
     `---- sp804
     `---- uart-pl011
          `---- cs0
     `---- fff30000.gpio
     `---- fff31000.gpio
     `---- fff32000.gpio
     `---- fff33000.gpio
     `---- fff35000.rtc
`---- fs
     `---- ramfs0
     `---- devfs0
`---- net
`---- global

drivers:
uart-pl011
sp804
pl061_gpio
ramfs
devfs
tftp
hb-xgmac
ahci
mem
[barebox@Calxeda Highbank]:/
 #

Cc: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 44 insertions, 8 deletions

diff --git a/arch/arm/boards/highbank/init.c b/arch/arm/boards/highbank/init.c
index b7936428dc..bcd2783a72 100644
--- a/arch/arm/boards/highbank/init.c
+++ b/arch/arm/boards/highbank/init.c
@@ -15,23 +15,59 @@
 #include <sizes.h>
 #include <io.h>
 
+#define FIRMWARE_DTB_BASE	0x1000
+
+struct fdt_header *fdt = NULL;
+
 static int highbank_mem_init(void)
 {
-	highbank_add_ddram(4089 << 20);
+	struct device_node *np;
+	int ret;
+
+	/* load by the firmware at 0x1000 */
+	fdt = IOMEM(FIRMWARE_DTB_BASE);
+
+	ret = of_unflatten_dtb(fdt);
+	if (ret) {
+		pr_warn("no dtb found at 0x1000 use default configuration\n");
+		fdt = NULL;
+		goto not_found;
+	}
 
+	np = of_find_node_by_path("/memory");
+	if (!np) {
+		pr_warn("no memory node use default configuration\n");
+		goto not_found;
+	}
+
+	ret = of_add_memory(np, true);
+	if (ret) {
+		pr_warn("memory node: probe failed use default configuration\n");
+		goto not_found;
+	}
+
+	pr_info("highbank: dtb probed memory size\n");
+
+	return 0;
+not_found:
+	highbank_add_ddram(4089 << 20);
 	return 0;
 }
 mem_initcall(highbank_mem_init);
 
 static int highbank_devices_init(void)
 {
-	highbank_register_gpio(0);
-	highbank_register_gpio(1);
-	highbank_register_gpio(2);
-	highbank_register_gpio(3);
-	highbank_register_ahci();
-	highbank_register_xgmac(0);
-	highbank_register_xgmac(1);
+	if (!fdt) {
+		highbank_register_gpio(0);
+		highbank_register_gpio(1);
+		highbank_register_gpio(2);
+		highbank_register_gpio(3);
+		highbank_register_ahci();
+		highbank_register_xgmac(0);
+		highbank_register_xgmac(1);
+	} else {
+		devfs_add_partition("ram0", FIRMWARE_DTB_BASE, SZ_64K, DEVFS_PARTITION_FIXED, "dtb");
+	}
 
 	armlinux_set_bootparams((void *)(0x00000100));