cm1_qp1 -> cm5200: single U-Boot image for modules from the cm5200 family.

Add the ability for modules from the Schindler cm5200 family to use a
single U-Boot image:
- rename cm1_qp1 to cm5200
- add run-time module detection
- parametrize SDRAM configuration according to the module we are running on

Few minor, board-specific fixes included in this patch:
- better MAC address handling
- updated default environment ('update' command uses +{filesize} now)
- improved error messages in the auto-update code
- allow booting U-Boot from RAM (CFG_RAMBOOT)

Signed-off-by: Grzegorz Bernacki <gjb@semihalf.com>
Signed-off-by: Piotr Kruszynski <ppk@semihalf.com>
Signed-off-by: Bartlomiej Sieka <tur@semihalf.com>

1 files changed, 425 insertions, 0 deletions

diff --git a/board/cm5200/cm5200.c b/board/cm5200/cm5200.c
new file mode 100644
index 0000000..6804e33
--- /dev/null
+++ b/board/cm5200/cm5200.c
@@ -0,0 +1,425 @@
+/*
+ * (C) Copyright 2003-2007
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2004
+ * Mark Jonas, Freescale Semiconductor, mark.jonas@motorola.com.
+ *
+ * (C) Copyright 2004-2005
+ * Martin Krause, TQ-Systems GmbH, martin.krause@tqs.de
+ *
+ * Adapted to U-Boot 1.2 by:
+ *   Bartlomiej Sieka <tur@semihalf.com>:
+ *      - HW ID readout from EEPROM
+ *      - module detection
+ *   Grzegorz Bernacki <gjb@semihalf.com>:
+ *      - run-time SDRAM controller configuration
+ *      - LIBFDT support
+ *
+ * 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 <mpc5xxx.h>
+#include <pci.h>
+#include <asm/processor.h>
+#include <i2c.h>
+#include <linux/ctype.h>
+
+#ifdef CONFIG_OF_LIBFDT
+#include <libfdt.h>
+#include <libfdt_env.h>
+#include <fdt_support.h>
+#endif /* CONFIG_OF_LIBFDT */
+
+
+#include "cm5200.h"
+#include "fwupdate.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static hw_id_t hw_id;
+
+
+#ifndef CFG_RAMBOOT
+/*
+ * Helper function to initialize SDRAM controller.
+ */
+static void sdram_start(int hi_addr, mem_conf_t *mem_conf)
+{
+	long hi_addr_bit = hi_addr ? 0x01000000 : 0;
+
+	/* unlock mode register */
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = mem_conf->control | 0x80000000 |
+						hi_addr_bit;
+
+	/* precharge all banks */
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = mem_conf->control | 0x80000002 |
+						hi_addr_bit;
+
+	/* auto refresh */
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = mem_conf->control | 0x80000004 |
+						hi_addr_bit;
+
+	/* auto refresh, second time */
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = mem_conf->control | 0x80000004 |
+						hi_addr_bit;
+
+	/* set mode register */
+	*(vu_long *)MPC5XXX_SDRAM_MODE = mem_conf->mode;
+
+	/* normal operation */
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = mem_conf->control | hi_addr_bit;
+}
+#endif /* CFG_RAMBOOT */
+
+
+/*
+ * Retrieve memory configuration for a given module. board_type is the index
+ * in hw_id_list[] corresponding to the module we are executing on; we return
+ * SDRAM controller settings approprate for this module.
+ */
+static mem_conf_t* get_mem_config(int board_type)
+{
+	switch(board_type){
+		case CM1_QA:
+			return memory_config[0];
+		case CM11_QA:
+		case CMU1_QA:
+			return memory_config[1];
+		default:
+			printf("ERROR: Unknown module, using a default SDRAM "
+				"configuration - things may not work!!!.\n");
+			return memory_config[0];
+	}
+}
+
+
+/*
+ * Initalize SDRAM - configure SDRAM controller, detect memory size.
+ */
+long int initdram(int board_type)
+{
+	ulong dramsize = 0;
+#ifndef CFG_RAMBOOT
+	ulong test1, test2;
+	mem_conf_t *mem_conf;
+
+	mem_conf = get_mem_config(board_type);
+	
+	/* configure SDRAM start/end for detection */
+	*(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x0000001e; /* 2G at 0x0 */
+
+	/* setup config registers */
+	*(vu_long *)MPC5XXX_SDRAM_CONFIG1 = mem_conf->config1;
+	*(vu_long *)MPC5XXX_SDRAM_CONFIG2 = mem_conf->config2;
+
+	sdram_start(0, mem_conf);
+	test1 = get_ram_size((long *)CFG_SDRAM_BASE, 0x80000000);
+	sdram_start(1, mem_conf);
+	test2 = get_ram_size((long *)CFG_SDRAM_BASE, 0x80000000);
+	if (test1 > test2) {
+		sdram_start(0, mem_conf);
+		dramsize = test1;
+	} else
+		dramsize = test2;
+
+	/* memory smaller than 1MB is impossible */
+	if (dramsize < (1 << 20))
+		dramsize = 0;
+
+	/* set SDRAM CS0 size according to the amount of RAM found */
+	if (dramsize > 0) {
+		*(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x13 +
+			__builtin_ffs(dramsize >> 20) - 1;
+	} else
+		*(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0; /* disabled */
+#else /* CFG_RAMBOOT */
+	/* retrieve size of memory connected to SDRAM CS0 */
+	dramsize = *(vu_long *)MPC5XXX_SDRAM_CS0CFG & 0xFF;
+	if (dramsize >= 0x13)
+		dramsize = (1 << (dramsize - 0x13)) << 20;
+	else
+		dramsize = 0;
+#endif /* !CFG_RAMBOOT */
+
+	/*
+	 * On MPC5200B we need to set the special configuration delay in the
+	 * DDR controller.  Refer to chapter 8.7.5 SDelay--MBAR + 0x0190 of
+	 * the MPC5200B User's Manual.
+	 */
+	*(vu_long *)MPC5XXX_SDRAM_SDELAY = 0x04;
+	__asm__ volatile ("sync");
+
+	return dramsize;
+}
+
+
+/*
+ * Read module hardware identification data from the I2C EEPROM.
+ */
+static void read_hw_id(hw_id_t hw_id)
+{
+	int i;
+	for (i = 0; i < HW_ID_ELEM_COUNT; ++i)
+		if (i2c_read(CFG_I2C_EEPROM,
+				hw_id_format[i].offset,
+				2,
+				(uchar *)&hw_id[i][0],
+				hw_id_format[i].length) != 0)
+			printf("ERROR: can't read HW ID from EEPROM\n");
+}
+
+
+/*
+ * Identify module we are running on, set gd->board_type to the index in
+ * hw_id_list[] corresponding to the module identifed, or to
+ * CM5200_UNKNOWN_MODULE if we can't identify the module.
+ */
+static void identify_module(hw_id_t hw_id)
+{
+	int i, j, element;
+	char match;
+	gd->board_type = CM5200_UNKNOWN_MODULE;
+	for (i = 0; i < sizeof (hw_id_list) / sizeof (char **); ++i) {
+		match = 1;
+		for (j = 0; j < sizeof (hw_id_identify) / sizeof (int); ++j) {
+			element = hw_id_identify[j];
+			if (strncmp(hw_id_list[i][element],
+					&hw_id[element][0],
+					hw_id_format[element].length) != 0) {
+				match = 0;
+				break;
+			}
+		}
+		if (match) {
+			gd->board_type = i;
+			break;
+		}
+	}
+}
+
+
+/*
+ * Compose string with module name.
+ * buf is assumed to have enough space, and be null-terminated.
+ */
+static void compose_module_name(hw_id_t hw_id, char *buf)
+{
+	char tmp[MODULE_NAME_MAXLEN];
+	strncat(buf, &hw_id[PCB_NAME][0], hw_id_format[PCB_NAME].length);
+	strncat(buf, ".", 1);
+	strncat(buf, &hw_id[FORM][0], hw_id_format[FORM].length);
+	strncat(buf, &hw_id[VERSION][0], hw_id_format[VERSION].length);
+	strncat(buf, " (", 2);
+	strncat(buf, &hw_id[IDENTIFICATION_NUMBER][0],
+		hw_id_format[IDENTIFICATION_NUMBER].length);
+	sprintf(tmp, " / %u.%u)",
+		hw_id[MAJOR_SW_VERSION][0],
+		hw_id[MINOR_SW_VERSION][0]);
+	strcat(buf, tmp);
+}
+
+
+/*
+ * Compose string with hostname.
+ * buf is assumed to have enough space, and be null-terminated.
+ */
+static void compose_hostname(hw_id_t hw_id, char *buf)
+{
+	char *p;
+	strncat(buf, &hw_id[PCB_NAME][0], hw_id_format[PCB_NAME].length);
+	strncat(buf, "_", 1);
+	strncat(buf, &hw_id[FORM][0], hw_id_format[FORM].length);
+	strncat(buf, &hw_id[VERSION][0], hw_id_format[VERSION].length);
+	for (p = buf; *p; ++p)
+		*p = tolower(*p);
+
+}
+
+
+#if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT)
+/*
+ * Update 'model' and 'memory' properties in the blob according to the module
+ * that we are running on.
+ */
+static void ft_blob_update(void *blob, bd_t *bd)
+{
+	int len, ret, nodeoffset = 0;
+	char module_name[MODULE_NAME_MAXLEN] = {0};
+	ulong memory_data[2] = {0};
+
+	compose_module_name(hw_id, module_name);
+	len = strlen(module_name) + 1;
+
+	ret = fdt_setprop(blob, nodeoffset, "model", module_name, len);
+	if (ret < 0)
+	printf("ft_blob_update(): cannot set /model property err:%s\n",
+		fdt_strerror(ret));
+
+	memory_data[0] = cpu_to_be32(bd->bi_memstart);
+	memory_data[1] = cpu_to_be32(bd->bi_memsize);
+
+	nodeoffset = fdt_find_node_by_path (blob, "/memory");
+	if (nodeoffset >= 0) {
+		ret = fdt_setprop(blob, nodeoffset, "reg", memory_data,
+					sizeof(memory_data));
+	if (ret < 0)
+		printf("ft_blob_update): cannot set /memory/reg "
+			"property err:%s\n", fdt_strerror(ret));
+	}
+	else {
+		/* memory node is required in dts */
+		printf("ft_blob_update(): cannot find /memory node "
+		"err:%s\n", fdt_strerror(nodeoffset));
+	}
+}
+#endif /* defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT) */
+
+
+/*
+ * Read HW ID from I2C EEPROM and detect the modue we are running on. Note
+ * that we need to use local variable for readout, because global data is not
+ * writable yet (and we'll have to redo the readout later on).
+ */
+int checkboard(void)
+{
+	hw_id_t hw_id_tmp;
+	char module_name_tmp[MODULE_NAME_MAXLEN] = "";
+
+	/* 
+	 * We need I2C to access HW ID data from EEPROM, so we call i2c_init()
+	 * here despite the fact that it will be called again later on. We
+	 * also use a little trick to silence I2C-related output.
+	 */
+	gd->flags |= GD_FLG_SILENT;
+	i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
+	gd->flags &= ~GD_FLG_SILENT;
+
+	read_hw_id(hw_id_tmp);
+	identify_module(hw_id_tmp);	/* this sets gd->board_type */
+	compose_module_name(hw_id_tmp, module_name_tmp);
+
+	if (gd->board_type != CM5200_UNKNOWN_MODULE)
+		printf("Board: %s\n", module_name_tmp);
+	else
+		printf("Board: unrecognized cm5200 module (%s)\n",
+			module_name_tmp);
+	
+	return 0;
+}
+
+
+int board_early_init_r(void)
+{
+	/*
+	 * Now, when we are in RAM, enable flash write access for detection
+	 * process. Note that CS_BOOT cannot be cleared when executing in
+	 * flash.
+	 */
+	*(vu_long *)MPC5XXX_BOOTCS_CFG &= ~0x1; /* clear RO */
+
+	/* Now that we can write to global data, read HW ID again. */
+	read_hw_id(hw_id);
+	return 0;
+}
+
+
+#ifdef CONFIG_POST
+int post_hotkeys_pressed(void)
+{
+	return 0;
+}
+#endif /* CONFIG_POST */
+
+
+#if defined(CONFIG_POST) || defined(CONFIG_LOGBUFFER)
+void post_word_store(ulong a)
+{
+	vu_long *save_addr = (vu_long *)(MPC5XXX_SRAM + MPC5XXX_SRAM_POST_SIZE);
+	*save_addr = a;
+}
+
+
+ulong post_word_load(void)
+{
+	vu_long *save_addr = (vu_long *)(MPC5XXX_SRAM + MPC5XXX_SRAM_POST_SIZE);
+	return *save_addr;
+}
+#endif /* CONFIG_POST || CONFIG_LOGBUFFER */
+
+
+#ifdef CONFIG_MISC_INIT_R
+int misc_init_r(void)
+{
+#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
+	uchar buf[6];
+	char str[18];
+	char hostname[MODULE_NAME_MAXLEN];
+
+	/* Read ethaddr from EEPROM */
+	if (i2c_read(CFG_I2C_EEPROM, CONFIG_MAC_OFFSET, 2, buf, 6) == 0) {
+		sprintf(str, "%02X:%02X:%02X:%02X:%02X:%02X",
+			buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
+		/* Check if MAC addr is owned by Schindler */
+		if (strstr(str, "00:06:C3") != str)
+			printf(LOG_PREFIX "Warning - Illegal MAC address (%s)"
+				" in EEPROM.\n", str);
+		else {
+			printf(LOG_PREFIX "Using MAC (%s) from I2C EEPROM\n",
+				str);
+			setenv("ethaddr", str);
+		}
+	} else {
+		printf(LOG_PREFIX "Warning - Unable to read MAC from I2C"
+			" device at address %02X:%04X\n", CFG_I2C_EEPROM,
+			CONFIG_MAC_OFFSET);
+	}
+#endif /* defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C) */
+	if (!getenv("ethaddr"))
+		printf(LOG_PREFIX "MAC address not set, networking is not "
+					"operational\n");
+
+	/* set the hostname appropriate to the module we're running on */
+	compose_hostname(hw_id, hostname);
+	setenv("hostname", hostname);
+
+	return 0;
+}
+#endif /* CONFIG_MISC_INIT_R */
+
+
+#ifdef CONFIG_LAST_STAGE_INIT
+int last_stage_init(void)
+{
+#ifdef CONFIG_USB_STORAGE
+	cm5200_fwupdate();
+#endif /* CONFIG_USB_STORAGE */
+	return 0;
+}
+#endif /* CONFIG_LAST_STAGE_INIT */
+
+
+#if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
+void ft_board_setup(void *blob, bd_t *bd)
+{
+	ft_cpu_setup(blob, bd);
+	ft_blob_update(blob, bd);
+}
+#endif /* defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP) */