powerpc/40x: Add support for the ESTeem 195E (PPC405EP) SBC

This patch adds support for the ESTeem 195E Hotfoot SBC.

There are several variants of the SBC deployed, single/dual
ethernet+serial, and also 4MB/8MB flash variations.  In the interest of
having a single kernel image boot on all boards, the cuboot shim detects
the differences and mangles the DTS tree appropriately.

With the exception of the CF interface that was never populated on
production boards, this code/DTS supports all boardpop options.

Signed-off-by: Solomon Peachy <solomon@linux-wlan.com>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>

1 files changed, 142 insertions, 0 deletions

diff --git a/arch/powerpc/boot/cuboot-hotfoot.c b/arch/powerpc/boot/cuboot-hotfoot.c
new file mode 100644
index 000000000000..8f697b958e45
--- /dev/null
+++ b/arch/powerpc/boot/cuboot-hotfoot.c
@@ -0,0 +1,142 @@
+/*
+ * Old U-boot compatibility for Esteem 195E Hotfoot CPU Board
+ *
+ * Author: Solomon Peachy <solomon@linux-wlan.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#include "ops.h"
+#include "stdio.h"
+#include "reg.h"
+#include "dcr.h"
+#include "4xx.h"
+#include "cuboot.h"
+
+#define TARGET_4xx
+#define TARGET_HOTFOOT
+
+#include "ppcboot-hotfoot.h"
+
+static bd_t bd;
+
+#define NUM_REGS 3
+
+static void hotfoot_fixups(void)
+{
+        u32 uart = mfdcr(DCRN_CPC0_UCR) & 0x7f;
+
+        dt_fixup_memory(bd.bi_memstart, bd.bi_memsize); 
+
+        dt_fixup_cpu_clocks(bd.bi_procfreq, bd.bi_procfreq, 0);
+        dt_fixup_clock("/plb", bd.bi_plb_busfreq);
+        dt_fixup_clock("/plb/opb", bd.bi_opbfreq);
+        dt_fixup_clock("/plb/ebc", bd.bi_pci_busfreq);
+        dt_fixup_clock("/plb/opb/serial@ef600300", bd.bi_procfreq / uart); 
+        dt_fixup_clock("/plb/opb/serial@ef600400", bd.bi_procfreq / uart); 
+        
+        dt_fixup_mac_address_by_alias("ethernet0", bd.bi_enetaddr);
+        dt_fixup_mac_address_by_alias("ethernet1", bd.bi_enet1addr);
+
+        /* Is this a single eth/serial board? */
+        if ((bd.bi_enet1addr[0] == 0) && 
+            (bd.bi_enet1addr[1] == 0) &&
+            (bd.bi_enet1addr[2] == 0) &&
+            (bd.bi_enet1addr[3] == 0) &&
+            (bd.bi_enet1addr[4] == 0) &&
+            (bd.bi_enet1addr[5] == 0)) {
+                void *devp;
+
+                printf("Trimming devtree for single serial/eth board\n");
+
+                devp = finddevice("/plb/opb/serial@ef600300");
+                if (!devp)
+                        fatal("Can't find node for /plb/opb/serial@ef600300");
+                del_node(devp);
+
+                devp = finddevice("/plb/opb/ethernet@ef600900");
+                if (!devp)
+                        fatal("Can't find node for /plb/opb/ethernet@ef600900");
+                del_node(devp);
+        }
+
+        ibm4xx_quiesce_eth((u32 *)0xef600800, (u32 *)0xef600900);
+
+        /* Fix up flash size in fdt for 4M boards. */
+        if (bd.bi_flashsize < 0x800000) {
+                u32 regs[NUM_REGS];
+                void *devp = finddevice("/plb/ebc/nor_flash@0");
+                if (!devp)
+                        fatal("Can't find FDT node for nor_flash!??");
+
+                printf("Fixing devtree for 4M Flash\n");
+                
+                /* First fix up the base addresse */
+                getprop(devp, "reg", regs, sizeof(regs));
+                regs[0] = 0;
+                regs[1] = 0xffc00000;
+                regs[2] = 0x00400000;
+                setprop(devp, "reg", regs, sizeof(regs));
+                
+                /* Then the offsets */
+                devp = finddevice("/plb/ebc/nor_flash@0/partition@0");
+                if (!devp)
+                        fatal("Can't find FDT node for partition@0");
+                getprop(devp, "reg", regs, 2*sizeof(u32));
+                regs[0] -= 0x400000;
+                setprop(devp, "reg", regs,  2*sizeof(u32));
+
+                devp = finddevice("/plb/ebc/nor_flash@0/partition@1");
+                if (!devp)
+                        fatal("Can't find FDT node for partition@1");
+                getprop(devp, "reg", regs, 2*sizeof(u32));
+                regs[0] -= 0x400000;
+                setprop(devp, "reg", regs,  2*sizeof(u32));
+
+                devp = finddevice("/plb/ebc/nor_flash@0/partition@2");
+                if (!devp)
+                        fatal("Can't find FDT node for partition@2");
+                getprop(devp, "reg", regs, 2*sizeof(u32));
+                regs[0] -= 0x400000;
+                setprop(devp, "reg", regs,  2*sizeof(u32));
+
+                devp = finddevice("/plb/ebc/nor_flash@0/partition@3");
+                if (!devp)
+                        fatal("Can't find FDT node for partition@3");
+                getprop(devp, "reg", regs, 2*sizeof(u32));
+                regs[0] -= 0x400000;
+                setprop(devp, "reg", regs,  2*sizeof(u32));
+
+                devp = finddevice("/plb/ebc/nor_flash@0/partition@4");
+                if (!devp)
+                        fatal("Can't find FDT node for partition@4");
+                getprop(devp, "reg", regs, 2*sizeof(u32));
+                regs[0] -= 0x400000;
+                setprop(devp, "reg", regs,  2*sizeof(u32));
+
+                devp = finddevice("/plb/ebc/nor_flash@0/partition@6");
+                if (!devp)
+                        fatal("Can't find FDT node for partition@6");
+                getprop(devp, "reg", regs, 2*sizeof(u32));
+                regs[0] -= 0x400000;
+                setprop(devp, "reg", regs,  2*sizeof(u32));
+
+                /* Delete the FeatFS node */
+                devp = finddevice("/plb/ebc/nor_flash@0/partition@5");
+                if (!devp)
+                        fatal("Can't find FDT node for partition@5");
+                del_node(devp);
+        }
+}
+
+void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
+                   unsigned long r6, unsigned long r7)
+{
+        CUBOOT_INIT();
+        platform_ops.fixups = hotfoot_fixups;
+        platform_ops.exit = ibm40x_dbcr_reset;
+        fdt_init(_dtb_start);
+        serial_console_init();
+}