MPC8308RDB: minimal support for devboard from Freescale

This patch provides support for MPC8308RDB development board from
Freescale with a minimal set of features:
 Dual UART is supported
 NOR flash is supported
 Both TSEC Ethernet controllers are supported
 PCI Express initialization is supported

The following features are enabled in configuration but not fully tested:
 I2C (used to get the board revision)
 I2C-connected RTC
 VSC7385 switch

There is one (hopefully) minor issue: on soft reset the board sometimes
resets twice. I've not managed to find the fix for this problem yet.
As a workaround instruction cache can be disabled.

Signed-off-by: Ilya Yanok <yanok@emcraft.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>

1 files changed, 160 insertions, 0 deletions

diff --git a/board/freescale/mpc8308rdb/mpc8308rdb.c b/board/freescale/mpc8308rdb/mpc8308rdb.c
new file mode 100644
index 0000000..a864189
--- /dev/null
+++ b/board/freescale/mpc8308rdb/mpc8308rdb.c
@@ -0,0 +1,160 @@
+/*
+ * Copyright (C) 2010 Freescale Semiconductor, Inc.
+ * Copyright (C) 2010 Ilya Yanok, Emcraft Systems, yanok@emcraft.com
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS for A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <hwconfig.h>
+#include <i2c.h>
+#include <libfdt.h>
+#include <fdt_support.h>
+#include <pci.h>
+#include <mpc83xx.h>
+#include <vsc7385.h>
+#include <netdev.h>
+#include <asm/io.h>
+#include <asm/fsl_serdes.h>
+#include <asm/fsl_mpc83xx_serdes.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int board_early_init_f(void)
+{
+	immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
+
+	if (in_be32(&im->pmc.pmccr1) & PMCCR1_POWER_OFF)
+		gd->flags |= GD_FLG_SILENT;
+
+	return 0;
+}
+
+static u8 read_board_info(void)
+{
+	u8 val8;
+	i2c_set_bus_num(0);
+
+	if (i2c_read(CONFIG_SYS_I2C_PCF8574A_ADDR, 0, 0, &val8, 1) == 0)
+		return val8;
+	else
+		return 0;
+}
+
+int checkboard(void)
+{
+	static const char * const rev_str[] = {
+		"1.0",
+		"<reserved>",
+		"<reserved>",
+		"<reserved>",
+		"<unknown>",
+	};
+	u8 info;
+	int i;
+
+	info = read_board_info();
+	i = (!info) ? 4 : info & 0x03;
+
+	printf("Board: Freescale MPC8308RDB Rev %s\n", rev_str[i]);
+
+	return 0;
+}
+
+static struct pci_region pcie_regions_0[] = {
+	{
+		.bus_start = CONFIG_SYS_PCIE1_MEM_BASE,
+		.phys_start = CONFIG_SYS_PCIE1_MEM_PHYS,
+		.size = CONFIG_SYS_PCIE1_MEM_SIZE,
+		.flags = PCI_REGION_MEM,
+	},
+	{
+		.bus_start = CONFIG_SYS_PCIE1_IO_BASE,
+		.phys_start = CONFIG_SYS_PCIE1_IO_PHYS,
+		.size = CONFIG_SYS_PCIE1_IO_SIZE,
+		.flags = PCI_REGION_IO,
+	},
+};
+
+void pci_init_board(void)
+{
+	immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
+	sysconf83xx_t *sysconf = &immr->sysconf;
+	clk83xx_t *clk = (clk83xx_t *)&immr->clk;
+	law83xx_t *pcie_law = sysconf->pcielaw;
+	struct pci_region *pcie_reg[] = { pcie_regions_0 };
+
+	fsl_setup_serdes(CONFIG_FSL_SERDES1, FSL_SERDES_PROTO_PEX,
+					FSL_SERDES_CLK_100, FSL_SERDES_VDD_1V);
+
+	clrsetbits_be32(&clk->sccr, SCCR_PCIEXP1CM ,
+				    SCCR_PCIEXP1CM_1);
+
+	/* Deassert the resets in the control register */
+	out_be32(&sysconf->pecr1, 0xE0008000);
+	udelay(2000);
+
+	/* Configure PCI Express Local Access Windows */
+	out_be32(&pcie_law[0].bar, CONFIG_SYS_PCIE1_BASE & LAWBAR_BAR);
+	out_be32(&pcie_law[0].ar, LBLAWAR_EN | LBLAWAR_512MB);
+
+	mpc83xx_pcie_init(1, pcie_reg, 0);
+}
+/*
+ * Miscellaneous late-boot configurations
+ *
+ * If a VSC7385 microcode image is present, then upload it.
+*/
+int misc_init_r(void)
+{
+#ifdef CONFIG_VSC7385_IMAGE
+	if (vsc7385_upload_firmware((void *) CONFIG_VSC7385_IMAGE,
+		CONFIG_VSC7385_IMAGE_SIZE)) {
+		puts("Failure uploading VSC7385 microcode.\n");
+		return 1;
+	}
+#endif
+
+	return 0;
+}
+#if defined(CONFIG_OF_BOARD_SETUP)
+void ft_board_setup(void *blob, bd_t *bd)
+{
+	ft_cpu_setup(blob, bd);
+	fdt_fixup_dr_usb(blob, bd);
+}
+#endif
+
+int board_eth_init(bd_t *bis)
+{
+	int rv, num_if = 0;
+
+	/* Initialize TSECs first */
+	if ((rv = cpu_eth_init(bis)) >= 0)
+		num_if += rv;
+	else
+		printf("ERROR: failed to initialize TSECs.\n");
+
+	if ((rv = pci_eth_init(bis)) >= 0)
+		num_if += rv;
+	else
+		printf("ERROR: failed to initialize PCI Ethernet.\n");
+
+	return num_if;
+}