From cdb97a6678826f85e7c69eae6a1c113d034c9b10 Mon Sep 17 00:00:00 2001
From: Andrei Safronov <safronov@pollux.denx.de>
Date: Fri, 8 Dec 2006 16:23:08 +0100
Subject: automatic update mechanism


diff --git a/board/mcc200/Makefile b/board/mcc200/Makefile
index 75808cb..5869119 100644
--- a/board/mcc200/Makefile
+++ b/board/mcc200/Makefile
@@ -25,7 +25,7 @@ include $(TOPDIR)/config.mk
 
 LIB	= $(obj)lib$(BOARD).a
 
-COBJS	:= $(BOARD).o lcd.o
+COBJS	:= $(BOARD).o lcd.o auto_update.o
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS))
diff --git a/board/mcc200/auto_update.c b/board/mcc200/auto_update.c
new file mode 100644
index 0000000..786543e
--- /dev/null
+++ b/board/mcc200/auto_update.c
@@ -0,0 +1,469 @@
+/*
+ * (C) Copyright 2006
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * 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 <command.h>
+#include <malloc.h>
+#include <image.h>
+#include <asm/byteorder.h>
+#include <usb.h>
+
+#ifdef CFG_HUSH_PARSER
+#include <hush.h>
+#endif
+
+
+#ifdef CONFIG_AUTO_UPDATE
+
+#ifndef CONFIG_USB_OHCI
+#error "must define CONFIG_USB_OHCI"
+#endif
+
+#ifndef CONFIG_USB_STORAGE
+#error "must define CONFIG_USB_STORAGE"
+#endif
+
+#ifndef CFG_HUSH_PARSER
+#error "must define CFG_HUSH_PARSER"
+#endif
+
+#if !(CONFIG_COMMANDS & CFG_CMD_FAT)
+#error "must define CFG_CMD_FAT"
+#endif
+
+/*
+ * Check whether a USB memory stick is plugged in.
+ * If one is found:
+ *	1) if prepare.img ist found load it into memory. If it is
+ *		valid then run it.
+ *	2) if preinst.img is found load it into memory. If it is
+ *		valid then run it. Update the EEPROM.
+ *	3) if firmw_01.img is found load it into memory. If it is valid,
+ *		burn it into FLASH and update the EEPROM.
+ *	4) if kernl_01.img is found load it into memory. If it is valid,
+ *		burn it into FLASH and update the EEPROM.
+ *	5) if app.img is found load it into memory. If it is valid,
+ *		burn it into FLASH and update the EEPROM.
+ *	6) if disk.img is found load it into memory. If it is valid,
+ *		burn it into FLASH and update the EEPROM.
+ *	7) if postinst.img is found load it into memory. If it is
+ *		valid then run it. Update the EEPROM.
+ */
+
+#undef AU_DEBUG
+
+#undef debug
+#ifdef	AU_DEBUG
+#define debug(fmt,args...)	printf (fmt ,##args)
+#else
+#define debug(fmt,args...)
+#endif	/* AU_DEBUG */
+
+/* possible names of files on the USB stick. */
+#define AU_FIRMWARE	"u-boot.img"
+#define AU_KERNEL	"kernel.img"
+
+struct flash_layout
+{
+	long start;
+	long end;
+};
+
+/* layout of the FLASH. ST = start address, ND = end address. */
+#define AU_FL_FIRMWARE_ST	0xfC000000
+#define AU_FL_FIRMWARE_ND	0xfC03FFFF
+#define AU_FL_KERNEL_ST		0xfC0C0000
+#define AU_FL_KERNEL_ND		0xfC1BFFFF
+
+static int au_usb_stor_curr_dev; /* current device */
+
+/* index of each file in the following arrays */
+#define IDX_FIRMWARE	0
+#define IDX_KERNEL	1
+
+/* max. number of files which could interest us */
+#define AU_MAXFILES 2
+
+/* pointers to file names */
+char *aufile[AU_MAXFILES];
+
+/* sizes of flash areas for each file */
+long ausize[AU_MAXFILES];
+
+/* array of flash areas start and end addresses */
+struct flash_layout aufl_layout[AU_MAXFILES] = { \
+	{AU_FL_FIRMWARE_ST, AU_FL_FIRMWARE_ND,}, \
+	{AU_FL_KERNEL_ST, AU_FL_KERNEL_ND,}, \
+};
+
+/* where to load files into memory */
+#define LOAD_ADDR ((unsigned char *)0x00200000)
+
+/* the app is the largest image */
+#define MAX_LOADSZ ausize[IDX_KERNEL]
+
+/*i2c address of the keypad status*/
+#define I2C_PSOC_KEYPAD_ADDR	0x53
+
+/* keypad mask */
+#define KEYPAD_ROW	3
+#define KEYPAD_COL	3
+#define KEYPAD_MASK_LO	((1<<(KEYPAD_COL-1+(KEYPAD_ROW*4-4)))&0xFF)
+#define KEYPAD_MASK_HI	((1<<(KEYPAD_COL-1+(KEYPAD_ROW*4-4)))>>8)
+
+/* externals */
+extern int fat_register_device(block_dev_desc_t *, int);
+extern int file_fat_detectfs(void);
+extern long file_fat_read(const char *, void *, unsigned long);
+extern int i2c_read (unsigned char, unsigned int, int , unsigned char* , int);
+extern int flash_sect_erase(ulong, ulong);
+extern int flash_sect_protect (int, ulong, ulong);
+extern int flash_write (char *, ulong, ulong);
+/* change char* to void* to shutup the compiler */
+extern block_dev_desc_t *get_dev (char*, int);
+extern int u_boot_hush_start(void);
+
+int
+au_check_cksum_valid(int idx, long nbytes)
+{
+	image_header_t *hdr;
+	unsigned long checksum;
+
+	hdr = (image_header_t *)LOAD_ADDR;
+
+	if (nbytes != (sizeof(*hdr) + ntohl(hdr->ih_size)))
+	{
+		printf ("Image %s bad total SIZE\n", aufile[idx]);
+		return -1;
+	}
+	/* check the data CRC */
+	checksum = ntohl(hdr->ih_dcrc);
+
+	if (crc32 (0, (uchar *)(LOAD_ADDR + sizeof(*hdr)), ntohl(hdr->ih_size))
+		!= checksum)
+	{
+		printf ("Image %s bad data checksum\n", aufile[idx]);
+		return -1;
+	}
+	return 0;
+}
+
+int
+au_check_header_valid(int idx, long nbytes)
+{
+	image_header_t *hdr;
+	unsigned long checksum;
+	unsigned char buf[4];
+
+	hdr = (image_header_t *)LOAD_ADDR;
+	/* check the easy ones first */
+#undef CHECK_VALID_DEBUG
+#ifdef CHECK_VALID_DEBUG
+	printf("magic %#x %#x ", ntohl(hdr->ih_magic), IH_MAGIC);
+	printf("arch %#x %#x ", hdr->ih_arch, IH_CPU_ARM);
+	printf("size %#x %#lx ", ntohl(hdr->ih_size), nbytes);
+	printf("type %#x %#x ", hdr->ih_type, IH_TYPE_KERNEL);
+#endif
+	if (nbytes < sizeof(*hdr))
+	{
+		printf ("Image %s bad header SIZE\n", aufile[idx]);
+		return -1;
+	}
+	if (ntohl(hdr->ih_magic) != IH_MAGIC || hdr->ih_arch != IH_CPU_PPC)
+	{
+		printf ("Image %s bad MAGIC or ARCH\n", aufile[idx]);
+		return -1;
+	}
+	/* check the hdr CRC */
+	checksum = ntohl(hdr->ih_hcrc);
+	hdr->ih_hcrc = 0;
+
+	if (crc32 (0, (uchar *)hdr, sizeof(*hdr)) != checksum) {
+		printf ("Image %s bad header checksum\n", aufile[idx]);
+		return -1;
+	}
+	hdr->ih_hcrc = htonl(checksum);
+	/* check the type - could do this all in one gigantic if() */
+	if ((idx == IDX_FIRMWARE) && (hdr->ih_type != IH_TYPE_FIRMWARE)) {
+		printf ("Image %s wrong type\n", aufile[idx]);
+		return -1;
+	}
+	if ((idx == IDX_KERNEL) && (hdr->ih_type != IH_TYPE_KERNEL)) {
+		printf ("Image %s wrong type\n", aufile[idx]);
+		return -1;
+	}
+	/* recycle checksum */
+	checksum = ntohl(hdr->ih_size);
+	/* for kernel and app the image header must also fit into flash */
+	if (idx != IDX_FIRMWARE)
+		checksum += sizeof(*hdr);
+	/* check the size does not exceed space in flash. HUSH scripts */
+	/* all have ausize[] set to 0 */
+	if ((ausize[idx] != 0) && (ausize[idx] < checksum)) {
+		printf ("Image %s is bigger than FLASH\n", aufile[idx]);
+		return -1;
+	}
+	return 0;
+}
+
+
+int
+au_do_update(int idx, long sz)
+{
+	image_header_t *hdr;
+	char *addr;
+	long start, end;
+	int off, rc;
+	uint nbytes;
+
+	hdr = (image_header_t *)LOAD_ADDR;
+
+	/* execute a script */
+	if (hdr->ih_type == IH_TYPE_SCRIPT) {
+		addr = (char *)((char *)hdr + sizeof(*hdr));
+		/* stick a NULL at the end of the script, otherwise */
+		/* parse_string_outer() runs off the end. */
+		addr[ntohl(hdr->ih_size)] = 0;
+		addr += 8;
+		parse_string_outer(addr, FLAG_PARSE_SEMICOLON);
+		return 0;
+	}
+
+	start = aufl_layout[idx].start;
+	end = aufl_layout[idx].end;
+
+	/* unprotect the address range */
+	/* this assumes that ONLY the firmware is protected! */
+	if (idx == IDX_FIRMWARE) {
+#undef AU_UPDATE_TEST
+#ifdef AU_UPDATE_TEST
+		/* erase it where Linux goes */
+		start = aufl_layout[1].start;
+		end = aufl_layout[1].end;
+#endif
+		flash_sect_protect(0, start, end);
+	}
+
+	/*
+	 * erase the address range.
+	 */
+	debug ("flash_sect_erase(%lx, %lx);\n", start, end);
+	flash_sect_erase(start, end);
+	wait_ms(100);
+	/* strip the header - except for the kernel and ramdisk */
+	if (hdr->ih_type == IH_TYPE_KERNEL) {
+		addr = (char *)hdr;
+		off = sizeof(*hdr);
+		nbytes = sizeof(*hdr) + ntohl(hdr->ih_size);
+	} else {
+		addr = (char *)((char *)hdr + sizeof(*hdr));
+#ifdef AU_UPDATE_TEST
+		/* copy it to where Linux goes */
+		if (idx == IDX_FIRMWARE)
+			start = aufl_layout[1].start;
+#endif
+		off = 0;
+		nbytes = ntohl(hdr->ih_size);
+	}
+
+	/* copy the data from RAM to FLASH */
+	debug ("flash_write(%p, %lx %x)\n", addr, start, nbytes);
+	rc = flash_write(addr, start, nbytes);
+	if (rc != 0) {
+		printf("Flashing failed due to error %d\n", rc);
+		return -1;
+	}
+
+	/* check the dcrc of the copy */
+	if (crc32 (0, (uchar *)(start + off), ntohl(hdr->ih_size)) != ntohl(hdr->ih_dcrc)) {
+		printf ("Image %s Bad Data Checksum After COPY\n", aufile[idx]);
+		return -1;
+	}
+
+	/* protect the address range */
+	/* this assumes that ONLY the firmware is protected! */
+	if (idx == IDX_FIRMWARE)
+		flash_sect_protect(1, start, end);
+	return 0;
+}
+
+
+/*
+ * this is called from board_init() after the hardware has been set up
+ * and is usable. That seems like a good time to do this.
+ * Right now the return value is ignored.
+ */
+int 
+do_auto_update(void)
+{
+	block_dev_desc_t *stor_dev;
+	long sz;
+	int i, res, bitmap_first, cnt, old_ctrlc, got_ctrlc;
+	char *env;
+	long start, end;
+	char keypad_status1[2] = {0,0}, keypad_status2[2] = {0,0};
+
+	/*
+	 * Read keypad status
+	 */
+	i2c_read(I2C_PSOC_KEYPAD_ADDR, 0, 0, keypad_status1, 2);
+	wait_ms(500);
+	i2c_read(I2C_PSOC_KEYPAD_ADDR, 0, 0, keypad_status2, 2);
+
+	/*
+	 * Check keypad
+	 */
+	if ( !(keypad_status1[0] & KEYPAD_MASK_HI) ||
+	      (keypad_status1[0] != keypad_status2[0])) {
+		return 0;
+	}
+	if ( !(keypad_status1[1] & KEYPAD_MASK_LO) ||
+	      (keypad_status1[1] != keypad_status2[1])) {
+		return 0;
+	}
+	au_usb_stor_curr_dev = -1;
+	/* start USB */
+	if (usb_stop() < 0) {
+		debug ("usb_stop failed\n");
+		return -1;
+	}
+	if (usb_init() < 0) {
+		debug ("usb_init failed\n");
+		return -1;
+	}
+	/*
+	 * check whether a storage device is attached (assume that it's
+	 * a USB memory stick, since nothing else should be attached).
+	 */
+	au_usb_stor_curr_dev = usb_stor_scan(0);
+	if (au_usb_stor_curr_dev == -1) {
+		debug ("No device found. Not initialized?\n");
+		return -1;
+	}
+	/* check whether it has a partition table */
+	stor_dev = get_dev("usb", 0);
+	if (stor_dev == NULL) {
+		debug ("uknown device type\n");
+		return -1;
+	}
+	if (fat_register_device(stor_dev, 1) != 0) {
+		debug ("Unable to use USB %d:%d for fatls\n",
+			au_usb_stor_curr_dev, 1);
+		return -1;
+	}
+	if (file_fat_detectfs() != 0) {
+		debug ("file_fat_detectfs failed\n");
+	}
+
+	/* initialize the array of file names */
+	memset(aufile, 0, sizeof(aufile));
+	aufile[IDX_FIRMWARE] = AU_FIRMWARE;
+	aufile[IDX_KERNEL] = AU_KERNEL;
+	/* initialize the array of flash sizes */
+	memset(ausize, 0, sizeof(ausize));
+	ausize[IDX_FIRMWARE] = (AU_FL_FIRMWARE_ND + 1) - AU_FL_FIRMWARE_ST;
+	ausize[IDX_KERNEL] = (AU_FL_KERNEL_ND + 1) - AU_FL_KERNEL_ST;
+	/*
+	 * now check whether start and end are defined using environment
+	 * variables.
+	 */
+	start = -1;
+	end = 0;
+	env = getenv("firmware_st");
+	if (env != NULL)
+		start = simple_strtoul(env, NULL, 16);
+	env = getenv("firmware_nd");
+	if (env != NULL)
+		end = simple_strtoul(env, NULL, 16);
+	if (start >= 0 && end && end > start) {
+		ausize[IDX_FIRMWARE] = (end + 1) - start;
+		aufl_layout[0].start = start;
+		aufl_layout[0].end = end;
+	}
+	start = -1;
+	end = 0;
+	env = getenv("kernel_st");
+	if (env != NULL)
+		start = simple_strtoul(env, NULL, 16);
+	env = getenv("kernel_nd");
+	if (env != NULL)
+		end = simple_strtoul(env, NULL, 16);
+	if (start >= 0 && end && end > start) {
+		ausize[IDX_KERNEL] = (end + 1) - start;
+		aufl_layout[1].start = start;
+		aufl_layout[1].end = end;
+	}
+	/* make certain that HUSH is runnable */
+	u_boot_hush_start();
+	/* make sure that we see CTRL-C and save the old state */
+	old_ctrlc = disable_ctrlc(0);
+
+	bitmap_first = 0;
+	/* just loop thru all the possible files */
+	for (i = 0; i < AU_MAXFILES; i++) {
+		/* just read the header */
+		sz = file_fat_read(aufile[i], LOAD_ADDR, sizeof(image_header_t));
+		debug ("read %s sz %ld hdr %d\n",
+			aufile[i], sz, sizeof(image_header_t));
+		if (sz <= 0 || sz < sizeof(image_header_t)) {
+			debug ("%s not found\n", aufile[i]);
+			continue;
+		}
+		if (au_check_header_valid(i, sz) < 0) {
+			debug ("%s header not valid\n", aufile[i]);
+			continue;
+		}
+		sz = file_fat_read(aufile[i], LOAD_ADDR, MAX_LOADSZ);
+		debug ("read %s sz %ld hdr %d\n",
+			aufile[i], sz, sizeof(image_header_t));
+		if (sz <= 0 || sz <= sizeof(image_header_t)) {
+			debug ("%s not found\n", aufile[i]);
+			continue;
+		}
+		if (au_check_cksum_valid(i, sz) < 0) {
+			debug ("%s checksum not valid\n", aufile[i]);
+			continue;
+		}
+		/* this is really not a good idea, but it's what the */
+		/* customer wants. */
+		cnt = 0;
+		got_ctrlc = 0;
+		do {
+			res = au_do_update(i, sz);
+			/* let the user break out of the loop */
+			if (ctrlc() || had_ctrlc()) {
+				clear_ctrlc();
+				if (res < 0)
+					got_ctrlc = 1;
+				break;
+			}
+			cnt++;
+#ifdef AU_TEST_ONLY
+		} while (res < 0 && cnt < 3);
+		if (cnt < 3)
+#else
+		} while (res < 0);
+#endif
+	}
+	usb_stop();
+	/* restore the old state */
+	disable_ctrlc(old_ctrlc);
+	return 0;
+}
+#endif /* CONFIG_AUTO_UPDATE */
diff --git a/board/mcc200/mcc200.c b/board/mcc200/mcc200.c
index 5d74bde..67969a6 100644
--- a/board/mcc200/mcc200.c
+++ b/board/mcc200/mcc200.c
@@ -44,6 +44,7 @@ DECLARE_GLOBAL_DATA_PTR;
 
 extern flash_info_t flash_info[];	/* FLASH chips info */
 
+extern int do_auto_update(void);
 ulong flash_get_size (ulong base, int banknum);
 
 #ifndef CFG_RAMBOOT
@@ -227,6 +228,10 @@ int misc_init_r (void)
 {
 	ulong flash_sup_end, snum;
 
+#ifdef CONFIG_AUTO_UPDATE
+	/* this has priority over all else */
+	do_auto_update();
+#endif
 	/*
 	 * Adjust flash start and offset to detected values
 	 */
diff --git a/include/configs/mcc200.h b/include/configs/mcc200.h
index 0c935bf..f60973b 100644
--- a/include/configs/mcc200.h
+++ b/include/configs/mcc200.h
@@ -94,6 +94,8 @@
 #define CONFIG_USB_OHCI
 #define ADD_USB_CMD		CFG_CMD_USB | CFG_CMD_FAT
 #define CONFIG_USB_STORAGE
+/* automatic software updates (see board/mcc200/auto_update.c) */
+#define CONFIG_AUTO_UPDATE 1
 
 /*
  * Supported commands
@@ -173,7 +175,7 @@
  * I2C configuration
  */
 #define CONFIG_HARD_I2C		1	/* I2C with hardware support */
-#define CFG_I2C_MODULE		1	/* Select I2C module #1 or #2 */
+#define CFG_I2C_MODULE		2	/* Select I2C module #1 or #2 */
 
 #define CFG_I2C_SPEED		100000 /* 100 kHz */
 #define CFG_I2C_SLAVE		0x7F
-- 
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