platform: add Raptor Blackbird support

Based off the Raptor patch:
https://git.raptorcs.com/git/blackbird-skiboot/commit/?id=c81f9d66592dc2a7cf7f6c59c3def5cee0638c1f

Notable changes:
- slot names matching what's silkscreened on the board
- Expose IPL Observer over op-panel OPAL calls

  This means you can "printf '\xfe\xfe\xfe' > /dev/op_panel" to
  make the IPL Observer on the Raptor BMC builds to realise it
  can turn on fan control.

Signed-off-by: Stewart Smith <stewart@flamingspork.com>
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>

platforms/astbmc/Makefile.inc

@@ -6,7 +6,8 @@ ASTBMC_OBJS = pnor.o common.o slots.o \
 	      garrison.o barreleye.o \
 	      witherspoon.o zaius.o romulus.o p9dsu.o \
 	      vesnin.o nicole.o mihawk.o\
-	      talos.o swift.o
+	      talos.o blackbird.o \
+	      swift.o
 
 ASTBMC = $(PLATDIR)/astbmc/built-in.a
 $(ASTBMC): $(ASTBMC_OBJS:%=$(PLATDIR)/astbmc/%)

platforms/astbmc/blackbird.c

@@ -0,0 +1,106 @@
+// SPDX-License-Identifier: Apache-2.0
+/* Copyright 2017 IBM Corp.
+ * Copyright 2018-2019 Raptor Engineering, LLC
+ * Copyright 2019 Stewart Smith
+ */
+
+#include <skiboot.h>
+#include <device.h>
+#include <console.h>
+#include <chip.h>
+#include <ipmi.h>
+#include <psi.h>
+#include <lpc.h>
+
+#include "astbmc.h"
+
+ST_PLUGGABLE(blackbird_cpu1_slot1, "SLOT1 PCIE 4.0 X16");
+ST_PLUGGABLE(blackbird_cpu1_slot2, "SLOT2 PCIE 4.0 X8");
+
+ST_BUILTIN_DEV(blackbird_builtin_sata, "Builtin SATA");
+ST_BUILTIN_DEV(blackbird_builtin_usb, "Builtin USB");
+ST_BUILTIN_DEV(blackbird_builtin_ethernet, "Builtin Ethernet");
+ST_BUILTIN_DEV(blackbird_builtin_bmc, "BMC");
+
+static const struct slot_table_entry blackbird_phb_table[] = {
+	ST_PHB_ENTRY(0, 0, blackbird_cpu1_slot1),
+	ST_PHB_ENTRY(0, 1, blackbird_cpu1_slot2),
+
+	ST_PHB_ENTRY(0, 2, blackbird_builtin_sata),
+	ST_PHB_ENTRY(0, 3, blackbird_builtin_usb),
+	ST_PHB_ENTRY(0, 4, blackbird_builtin_ethernet),
+	ST_PHB_ENTRY(0, 5, blackbird_builtin_bmc),
+
+	{ .etype = st_end },
+};
+
+static bool blackbird_probe(void)
+{
+	if (!dt_node_is_compatible(dt_root, "rcs,blackbird"))
+		return false;
+
+	/* Lot of common early inits here */
+	astbmc_early_init();
+
+	/* Setup UART for use by OPAL (Linux hvc) */
+	uart_set_console_policy(UART_CONSOLE_OPAL);
+
+	slot_table_init(blackbird_phb_table);
+
+	return true;
+}
+
+static int64_t blackbird_write_oppanel_async(uint64_t async_token __unused,
+					     oppanel_line_t *lines,
+					     uint64_t num_lines)
+{
+	uint8_t *line;
+	int len;
+
+	if (num_lines != 1)
+		return OPAL_PARAMETER;
+
+	line = (void *) be64_to_cpu(lines[0].line);
+	len = lines[0].line_len;
+
+	if (len > 0)
+		lpc_probe_write(OPAL_LPC_IO, 0x80, line[0], 1);
+	if (len > 1)
+		lpc_probe_write(OPAL_LPC_IO, 0x81, line[1], 1);
+	if (len > 2)
+		lpc_probe_write(OPAL_LPC_IO, 0x82, line[2], 1);
+
+	return OPAL_SUCCESS;
+}
+
+static void blackbird_init(void)
+{
+	struct dt_node *oppanel;
+
+	astbmc_init();
+
+	opal_register(OPAL_WRITE_OPPANEL_ASYNC, blackbird_write_oppanel_async, 3);
+
+	oppanel = dt_new(opal_node, "oppanel");
+	dt_add_property_cells(oppanel, "#length", 3);
+	dt_add_property_cells(oppanel, "#lines", 1);
+	dt_add_property_strings(oppanel, "compatible", "ibm,opal-oppanel", "rcs,ipl-observer");
+
+}
+
+DECLARE_PLATFORM(blackbird) = {
+	.name			= "Blackbird",
+	.probe			= blackbird_probe,
+	.init			= blackbird_init,
+	.start_preload_resource	= flash_start_preload_resource,
+	.resource_loaded	= flash_resource_loaded,
+	.bmc			= &bmc_plat_ast2500_openbmc,
+	.pci_get_slot_info	= slot_table_get_slot_info,
+	.pci_probe_complete	= check_all_slot_table,
+	.cec_power_down         = astbmc_ipmi_power_down,
+	.cec_reboot             = astbmc_ipmi_reboot,
+	.elog_commit		= ipmi_elog_commit,
+	.exit			= astbmc_exit,
+	.terminate		= ipmi_terminate,
+	.op_display		= op_display_lpc,
+};