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>

2 files changed, 281 insertions, 9 deletions

diff --git a/board/imgtec/malta/lowlevel_init.S b/board/imgtec/malta/lowlevel_init.S
index fa0b6a7..1af34f1 100644
--- a/board/imgtec/malta/lowlevel_init.S
+++ b/board/imgtec/malta/lowlevel_init.S
@@ -6,6 +6,8 @@
 
 #include <config.h>
 #include <gt64120.h>
+#include <msc01.h>
+#include <pci.h>
 
 #include <asm/addrspace.h>
 #include <asm/regdef.h>
@@ -25,6 +27,25 @@
 
 	.globl	lowlevel_init
 lowlevel_init:
+	/* detect the core card */
+	li	t0, KSEG1ADDR(MALTA_REVISION)
+	lw	t0, 0(t0)
+	srl	t0, t0, MALTA_REVISION_CORID_SHF
+	andi	t0, t0, (MALTA_REVISION_CORID_MSK >> \
+			 MALTA_REVISION_CORID_SHF)
+
+	/* core cards using the gt64120 system controller */
+	li	t1, MALTA_REVISION_CORID_CORE_LV
+	beq	t0, t1, _gt64120
+
+	/* core cards using the MSC01 system controller */
+	 li	t1, MALTA_REVISION_CORID_CORE_FPGA6
+	beq	t0, t1, _msc01
+	 nop
+
+	/* unknown system controller */
+	b	.
+	 nop
 
 	/*
 	 * Load BAR registers of GT64120 as done by YAMON
@@ -39,7 +60,7 @@ lowlevel_init:
 	 * based on write_bootloader() in qemu.git/hw/mips_malta.c
 	 * see GT64120 manual and qemu.git/hw/gt64xxx.c for details
 	 */
-
+_gt64120:
 	/* move GT64120 registers from 0x14000000 to 0x1be00000 */
 	li	t1, KSEG1ADDR(GT_DEF_BASE)
 	li	t0, CPU_TO_GT32(0xdf000000)
@@ -67,3 +88,144 @@ lowlevel_init:
 
 	jr	ra
 	 nop
+
+	/*
+	 *
+	 */
+_msc01:
+	/* setup peripheral bus controller clock divide */
+	li	t0, KSEG1ADDR(MALTA_MSC01_PBC_BASE)
+	li	t1, 0x1 << MSC01_PBC_CLKCFG_SHF
+	sw	t1, MSC01_PBC_CLKCFG_OFS(t0)
+
+	/* tweak peripheral bus controller timings */
+	li	t1, (0x1 << MSC01_PBC_CS0TIM_CDT_SHF) | \
+		    (0x1 << MSC01_PBC_CS0TIM_CAT_SHF)
+	sw	t1, MSC01_PBC_CS0TIM_OFS(t0)
+	li	t1, (0x0 << MSC01_PBC_CS0RW_RDT_SHF) | \
+		    (0x2 << MSC01_PBC_CS0RW_RAT_SHF) | \
+		    (0x0 << MSC01_PBC_CS0RW_WDT_SHF) | \
+		    (0x2 << MSC01_PBC_CS0RW_WAT_SHF)
+	sw	t1, MSC01_PBC_CS0RW_OFS(t0)
+	lw	t1, MSC01_PBC_CS0CFG_OFS(t0)
+	li	t2, MSC01_PBC_CS0CFG_DTYP_MSK
+	and	t1, t2
+	ori	t1, (0x0 << MSC01_PBC_CS0CFG_ADM_SHF) | \
+		    (0x3 << MSC01_PBC_CS0CFG_WSIDLE_SHF) | \
+		    (0x10 << MSC01_PBC_CS0CFG_WS_SHF)
+	sw	t1, MSC01_PBC_CS0CFG_OFS(t0)
+
+	/* setup basic address decode */
+	li	t0, KSEG1ADDR(MALTA_MSC01_BIU_BASE)
+	li	t1, 0x0
+	li	t2, -CONFIG_SYS_MEM_SIZE
+	sw	t1, MSC01_BIU_MCBAS1L_OFS(t0)
+	sw	t2, MSC01_BIU_MCMSK1L_OFS(t0)
+	sw	t1, MSC01_BIU_MCBAS2L_OFS(t0)
+	sw	t2, MSC01_BIU_MCMSK2L_OFS(t0)
+
+	/* initialise IP1 - unused */
+	li	t1, MALTA_MSC01_IP1_BASE
+	li	t2, -MALTA_MSC01_IP1_SIZE
+	sw	t1, MSC01_BIU_IP1BAS1L_OFS(t0)
+	sw	t2, MSC01_BIU_IP1MSK1L_OFS(t0)
+	sw	t1, MSC01_BIU_IP1BAS2L_OFS(t0)
+	sw	t2, MSC01_BIU_IP1MSK2L_OFS(t0)
+
+	/* initialise IP2 - PCI */
+	li	t1, MALTA_MSC01_IP2_BASE1
+	li	t2, -MALTA_MSC01_IP2_SIZE1
+	sw	t1, MSC01_BIU_IP2BAS1L_OFS(t0)
+	sw	t2, MSC01_BIU_IP2MSK1L_OFS(t0)
+	li	t1, MALTA_MSC01_IP2_BASE2
+	li	t2, -MALTA_MSC01_IP2_SIZE2
+	sw	t1, MSC01_BIU_IP2BAS2L_OFS(t0)
+	sw	t2, MSC01_BIU_IP2MSK2L_OFS(t0)
+
+	/* initialise IP3 - peripheral bus controller */
+	li	t1, MALTA_MSC01_IP3_BASE
+	li	t2, -MALTA_MSC01_IP3_SIZE
+	sw	t1, MSC01_BIU_IP3BAS1L_OFS(t0)
+	sw	t2, MSC01_BIU_IP3MSK1L_OFS(t0)
+	sw	t1, MSC01_BIU_IP3BAS2L_OFS(t0)
+	sw	t2, MSC01_BIU_IP3MSK2L_OFS(t0)
+
+	/* setup PCI memory */
+	li	t0, KSEG1ADDR(MALTA_MSC01_PCI_BASE)
+	li	t1, MALTA_MSC01_PCIMEM_BASE
+	li	t2, (-MALTA_MSC01_PCIMEM_SIZE) & MSC01_PCI_SC2PMMSKL_MSK_MSK
+	li	t3, MALTA_MSC01_PCIMEM_MAP
+	sw	t1, MSC01_PCI_SC2PMBASL_OFS(t0)
+	sw	t2, MSC01_PCI_SC2PMMSKL_OFS(t0)
+	sw	t3, MSC01_PCI_SC2PMMAPL_OFS(t0)
+
+	/* setup PCI I/O */
+	li	t1, MALTA_MSC01_PCIIO_BASE
+	li	t2, (-MALTA_MSC01_PCIIO_SIZE) & MSC01_PCI_SC2PIOMSKL_MSK_MSK
+	li	t3, MALTA_MSC01_PCIIO_MAP
+	sw	t1, MSC01_PCI_SC2PIOBASL_OFS(t0)
+	sw	t2, MSC01_PCI_SC2PIOMSKL_OFS(t0)
+	sw	t3, MSC01_PCI_SC2PIOMAPL_OFS(t0)
+
+	/* setup PCI_BAR0 memory window */
+	li	t1, -CONFIG_SYS_MEM_SIZE
+	sw	t1, MSC01_PCI_BAR0_OFS(t0)
+
+	/* setup PCI to SysCon/CPU translation */
+	sw	t1, MSC01_PCI_P2SCMSKL_OFS(t0)
+	sw	zero, MSC01_PCI_P2SCMAPL_OFS(t0)
+
+	/* setup PCI vendor & device IDs */
+	li	t1, (PCI_VENDOR_ID_MIPS << MSC01_PCI_HEAD0_VENDORID_SHF) | \
+		    (PCI_DEVICE_ID_MIPS_MSC01 << MSC01_PCI_HEAD0_DEVICEID_SHF)
+	sw	t1, MSC01_PCI_HEAD0_OFS(t0)
+
+	/* setup PCI subsystem vendor & device IDs */
+	sw	t1, MSC01_PCI_HEAD11_OFS(t0)
+
+	/* setup PCI class, revision */
+	li	t1, (PCI_CLASS_BRIDGE_HOST << MSC01_PCI_HEAD2_CLASS_SHF) | \
+		    (0x1 << MSC01_PCI_HEAD2_REV_SHF)
+	sw	t1, MSC01_PCI_HEAD2_OFS(t0)
+
+	/* ensure a sane setup */
+	sw	zero, MSC01_PCI_HEAD3_OFS(t0)
+	sw	zero, MSC01_PCI_HEAD4_OFS(t0)
+	sw	zero, MSC01_PCI_HEAD5_OFS(t0)
+	sw	zero, MSC01_PCI_HEAD6_OFS(t0)
+	sw	zero, MSC01_PCI_HEAD7_OFS(t0)
+	sw	zero, MSC01_PCI_HEAD8_OFS(t0)
+	sw	zero, MSC01_PCI_HEAD9_OFS(t0)
+	sw	zero, MSC01_PCI_HEAD10_OFS(t0)
+	sw	zero, MSC01_PCI_HEAD12_OFS(t0)
+	sw	zero, MSC01_PCI_HEAD13_OFS(t0)
+	sw	zero, MSC01_PCI_HEAD14_OFS(t0)
+	sw	zero, MSC01_PCI_HEAD15_OFS(t0)
+
+	/* setup PCI command register */
+	li	t1, (PCI_COMMAND_FAST_BACK | \
+		     PCI_COMMAND_SERR | \
+		     PCI_COMMAND_PARITY | \
+		     PCI_COMMAND_MASTER | \
+		     PCI_COMMAND_MEMORY)
+	sw	t1, MSC01_PCI_HEAD1_OFS(t0)
+
+	/* setup PCI byte swapping */
+#ifdef CONFIG_SYS_BIG_ENDIAN
+	li	t1, (0x1 << MSC01_PCI_SWAP_BAR0_BSWAP_SHF) | \
+		    (0x1 << MSC01_PCI_SWAP_IO_BSWAP_SHF)
+	sw	t1, MSC01_PCI_SWAP_OFS(t0)
+#else
+	sw	zero, MSC01_PCI_SWAP_OFS(t0)
+#endif
+
+	/* enable PCI host configuration cycles */
+	lw	t1, MSC01_PCI_CFG_OFS(t0)
+	li	t2, MSC01_PCI_CFG_RA_MSK | \
+		    MSC01_PCI_CFG_G_MSK | \
+		    MSC01_PCI_CFG_EN_MSK
+	or	t1, t1, t2
+	sw	t1, MSC01_PCI_CFG_OFS(t0)
+
+	jr	ra
+	 nop
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;
+	}
 }