malta: support for coreFPGA6 boards

This patch adds support for running on Malta boards using coreFPGA6
core cards, including support for the msc01 system controller used
with them. The system controller is detected at runtime allowing one
U-boot binary to run on a Malta with either.

Due to the PCI I/O base differing between Maltas using gt64120 & msc01
system controllers, the UART setup is modified slightly. A second UART
is added so that there is one pointing at the correct address for each
system controller. The Malta board then defines its own
default_serial_console function to select the correct one at runtime.
The incorrect UART will simply not function.

Tested on:
  - A coreFPGA6 Malta running interAptiv and proAptiv bitstreams, both
    with and without an L2 cache.
  - QEMU.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>

1 files changed, 118 insertions, 8 deletions

diff --git a/board/imgtec/malta/malta.c b/board/imgtec/malta/malta.c
index 09da9ea..2af0067 100644
--- a/board/imgtec/malta/malta.c
+++ b/board/imgtec/malta/malta.c
@@ -1,19 +1,67 @@
 /*
  * Copyright (C) 2013 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2013 Imagination Technologies
  *
  * SPDX-License-Identifier:	GPL-2.0
  */
 
 #include <common.h>
 #include <netdev.h>
+#include <pci_gt64120.h>
+#include <pci_msc01.h>
+#include <serial.h>
 
 #include <asm/addrspace.h>
 #include <asm/io.h>
 #include <asm/malta.h>
-#include <pci_gt64120.h>
 
 #include "superio.h"
 
+enum core_card {
+	CORE_UNKNOWN,
+	CORE_LV,
+	CORE_FPGA6,
+};
+
+enum sys_con {
+	SYSCON_UNKNOWN,
+	SYSCON_GT64120,
+	SYSCON_MSC01,
+};
+
+static enum core_card malta_core_card(void)
+{
+	u32 corid, rev;
+
+	rev = __raw_readl(CKSEG1ADDR(MALTA_REVISION));
+	corid = (rev & MALTA_REVISION_CORID_MSK) >> MALTA_REVISION_CORID_SHF;
+
+	switch (corid) {
+	case MALTA_REVISION_CORID_CORE_LV:
+		return CORE_LV;
+
+	case MALTA_REVISION_CORID_CORE_FPGA6:
+		return CORE_FPGA6;
+
+	default:
+		return CORE_UNKNOWN;
+	}
+}
+
+static enum sys_con malta_sys_con(void)
+{
+	switch (malta_core_card()) {
+	case CORE_LV:
+		return SYSCON_GT64120;
+
+	case CORE_FPGA6:
+		return SYSCON_MSC01;
+
+	default:
+		return SYSCON_UNKNOWN;
+	}
+}
+
 phys_size_t initdram(int board_type)
 {
 	return CONFIG_SYS_MEM_SIZE;
@@ -21,7 +69,25 @@ phys_size_t initdram(int board_type)
 
 int checkboard(void)
 {
-	puts("Board: MIPS Malta CoreLV (Qemu)\n");
+	enum core_card core;
+
+	puts("Board: MIPS Malta");
+
+	core = malta_core_card();
+	switch (core) {
+	case CORE_LV:
+		puts(" CoreLV");
+		break;
+
+	case CORE_FPGA6:
+		puts(" CoreFPGA6");
+		break;
+
+	default:
+		puts(" CoreUnknown");
+	}
+
+	putc('\n');
 	return 0;
 }
 
@@ -40,18 +106,62 @@ void _machine_restart(void)
 
 int board_early_init_f(void)
 {
+	void *io_base;
+
+	/* choose correct PCI I/O base */
+	switch (malta_sys_con()) {
+	case SYSCON_GT64120:
+		io_base = (void *)CKSEG1ADDR(MALTA_GT_PCIIO_BASE);
+		break;
+
+	case SYSCON_MSC01:
+		io_base = (void *)CKSEG1ADDR(MALTA_MSC01_PCIIO_BASE);
+		break;
+
+	default:
+		return -1;
+	}
+
 	/* setup FDC37M817 super I/O controller */
-	malta_superio_init((void *)CKSEG1ADDR(MALTA_IO_PORT_BASE));
+	malta_superio_init(io_base);
 
 	return 0;
 }
 
+struct serial_device *default_serial_console(void)
+{
+	switch (malta_sys_con()) {
+	case SYSCON_GT64120:
+		return &eserial1_device;
+
+	default:
+	case SYSCON_MSC01:
+		return &eserial2_device;
+	}
+}
+
 void pci_init_board(void)
 {
-	set_io_port_base(CKSEG1ADDR(MALTA_IO_PORT_BASE));
+	switch (malta_sys_con()) {
+	case SYSCON_GT64120:
+		set_io_port_base(CKSEG1ADDR(MALTA_GT_PCIIO_BASE));
+
+		gt64120_pci_init((void *)CKSEG1ADDR(MALTA_GT_BASE),
+				 0x00000000, 0x00000000, CONFIG_SYS_MEM_SIZE,
+				 0x10000000, 0x10000000, 128 * 1024 * 1024,
+				 0x00000000, 0x00000000, 0x20000);
+		break;
+
+	default:
+	case SYSCON_MSC01:
+		set_io_port_base(CKSEG1ADDR(MALTA_MSC01_PCIIO_BASE));
 
-	gt64120_pci_init((void *)CKSEG1ADDR(MALTA_GT_BASE),
-			 0x00000000, 0x00000000, CONFIG_SYS_MEM_SIZE,
-			 0x10000000, 0x10000000, 128 * 1024 * 1024,
-			 0x00000000, 0x00000000, 0x20000);
+		msc01_pci_init((void *)CKSEG1ADDR(MALTA_MSC01_PCI_BASE),
+			       0x00000000, 0x00000000, CONFIG_SYS_MEM_SIZE,
+			       MALTA_MSC01_PCIMEM_MAP,
+			       CKSEG1ADDR(MALTA_MSC01_PCIMEM_BASE),
+			       MALTA_MSC01_PCIMEM_SIZE, MALTA_MSC01_PCIIO_MAP,
+			       0x00000000, MALTA_MSC01_PCIIO_SIZE);
+		break;
+	}
 }