--- /dev/null
+/*
+ * (C) Copyright 2000-2004
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * 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
+ */
+
+/*
+ * Serial up- and download support
+ */
+#include <common.h>
+
+#define putc serial_putc
+#define tstc serial_tstc
+
+/*******************************************************
+ * Routine: delay
+ * Description: spinning delay to use before udelay works
+ ******************************************************/
+static inline void delay(unsigned long loops)
+{
+ __asm__ volatile ("1:\n" "subs %0, %1, #1\n"
+ "bne 1b":"=r" (loops):"0"(loops));
+}
+static inline void udelay(unsigned long us)
+{
+ delay(us * 200); /* approximate */
+}
+
+#ifdef CFG_CMD_FAT
+extern void * memcpy(void * dest,const void *src,size_t count);
+#else
+void * memcpy(void * dest,const void *src,size_t count)
+{
+ char *tmp = (char *) dest, *s = (char *) src;
+
+ while (count--)
+ *tmp++ = *s++;
+
+ return dest;
+}
+#endif
+
+/* -------------------------------------------------------------------- */
+
+#define XON_CHAR 17
+#define XOFF_CHAR 19
+#define START_CHAR 0x01
+#define ETX_CHAR 0x03
+#define END_CHAR 0x0D
+#define SPACE 0x20
+#define K_ESCAPE 0x23
+#define SEND_TYPE 'S'
+#define DATA_TYPE 'D'
+#define ACK_TYPE 'Y'
+#define NACK_TYPE 'N'
+#define BREAK_TYPE 'B'
+#define tochar(x) ((char) (((x) + SPACE) & 0xff))
+#define untochar(x) ((int) (((x) - SPACE) & 0xff))
+
+extern int os_data_count;
+extern int os_data_header[8];
+
+static void set_kerm_bin_mode(unsigned long *);
+static int k_recv(void);
+static ulong load_serial_bin (ulong offset);
+
+
+char his_eol; /* character he needs at end of packet */
+int his_pad_count; /* number of pad chars he needs */
+char his_pad_char; /* pad chars he needs */
+char his_quote; /* quote chars he'll use */
+
+int do_load_serial_bin (ulong offset, int baudrate)
+{
+ ulong addr;
+ int rcode = 0;
+
+ printf ("## Ready for binary (kermit) download "
+ "to 0x%08lX at %d bps...\n",
+ offset,
+ baudrate);
+ addr = load_serial_bin (offset);
+ if (addr == ~0) {
+ printf ("## Binary (kermit) download aborted\n");
+ rcode = 1;
+ } else {
+ printf ("## Start Addr = 0x%08lX\n", addr);
+ }
+
+ return rcode;
+}
+
+
+static ulong load_serial_bin (ulong offset)
+{
+ int size, i;
+
+ set_kerm_bin_mode ((ulong *) offset);
+ size = k_recv ();
+
+ /*
+ * Gather any trailing characters (for instance, the ^D which
+ * is sent by 'cu' after sending a file), and give the
+ * box some time (100 * 1 ms)
+ */
+ for (i=0; i<100; ++i) {
+ if (tstc()) {
+ (void) getc();
+ }
+ udelay(1000);
+ }
+
+ printf("## Total Size = 0x%08x = %d Bytes\n", size, size);
+
+ return offset;
+}
+
+void send_pad (void)
+{
+ int count = his_pad_count;
+
+ while (count-- > 0)
+ putc (his_pad_char);
+}
+
+/* converts escaped kermit char to binary char */
+char ktrans (char in)
+{
+ if ((in & 0x60) == 0x40) {
+ return (char) (in & ~0x40);
+ } else if ((in & 0x7f) == 0x3f) {
+ return (char) (in | 0x40);
+ } else
+ return in;
+}
+
+int chk1 (char *buffer)
+{
+ int total = 0;
+
+ while (*buffer) {
+ total += *buffer++;
+ }
+ return (int) ((total + ((total >> 6) & 0x03)) & 0x3f);
+}
+
+void s1_sendpacket (char *packet)
+{
+ send_pad ();
+ while (*packet) {
+ putc (*packet++);
+ }
+}
+
+static char a_b[24];
+void send_ack (int n)
+{
+ a_b[0] = START_CHAR;
+ a_b[1] = tochar (3);
+ a_b[2] = tochar (n);
+ a_b[3] = ACK_TYPE;
+ a_b[4] = '\0';
+ a_b[4] = tochar (chk1 (&a_b[1]));
+ a_b[5] = his_eol;
+ a_b[6] = '\0';
+ s1_sendpacket (a_b);
+}
+
+void send_nack (int n)
+{
+ a_b[0] = START_CHAR;
+ a_b[1] = tochar (3);
+ a_b[2] = tochar (n);
+ a_b[3] = NACK_TYPE;
+ a_b[4] = '\0';
+ a_b[4] = tochar (chk1 (&a_b[1]));
+ a_b[5] = his_eol;
+ a_b[6] = '\0';
+ s1_sendpacket (a_b);
+}
+
+
+/* os_data_* takes an OS Open image and puts it into memory, and
+ puts the boot header in an array named os_data_header
+
+ if image is binary, no header is stored in os_data_header.
+*/
+void (*os_data_init) (void);
+void (*os_data_char) (char new_char);
+static int os_data_state, os_data_state_saved;
+int os_data_count;
+static int os_data_count_saved;
+static char *os_data_addr, *os_data_addr_saved;
+static char *bin_start_address;
+int os_data_header[8];
+static void bin_data_init (void)
+{
+ os_data_state = 0;
+ os_data_count = 0;
+ os_data_addr = bin_start_address;
+}
+static void os_data_save (void)
+{
+ os_data_state_saved = os_data_state;
+ os_data_count_saved = os_data_count;
+ os_data_addr_saved = os_data_addr;
+}
+static void os_data_restore (void)
+{
+ os_data_state = os_data_state_saved;
+ os_data_count = os_data_count_saved;
+ os_data_addr = os_data_addr_saved;
+}
+static void bin_data_char (char new_char)
+{
+ switch (os_data_state) {
+ case 0: /* data */
+ *os_data_addr++ = new_char;
+ --os_data_count;
+ break;
+ }
+}
+static void set_kerm_bin_mode (unsigned long *addr)
+{
+ bin_start_address = (char *) addr;
+ os_data_init = bin_data_init;
+ os_data_char = bin_data_char;
+}
+
+
+/* k_data_* simply handles the kermit escape translations */
+static int k_data_escape, k_data_escape_saved;
+void k_data_init (void)
+{
+ k_data_escape = 0;
+ os_data_init ();
+}
+void k_data_save (void)
+{
+ k_data_escape_saved = k_data_escape;
+ os_data_save ();
+}
+void k_data_restore (void)
+{
+ k_data_escape = k_data_escape_saved;
+ os_data_restore ();
+}
+void k_data_char (char new_char)
+{
+ if (k_data_escape) {
+ /* last char was escape - translate this character */
+ os_data_char (ktrans (new_char));
+ k_data_escape = 0;
+ } else {
+ if (new_char == his_quote) {
+ /* this char is escape - remember */
+ k_data_escape = 1;
+ } else {
+ /* otherwise send this char as-is */
+ os_data_char (new_char);
+ }
+ }
+}
+
+#define SEND_DATA_SIZE 20
+char send_parms[SEND_DATA_SIZE];
+char *send_ptr;
+
+/* handle_send_packet interprits the protocol info and builds and
+ sends an appropriate ack for what we can do */
+void handle_send_packet (int n)
+{
+ int length = 3;
+ int bytes;
+
+ /* initialize some protocol parameters */
+ his_eol = END_CHAR; /* default end of line character */
+ his_pad_count = 0;
+ his_pad_char = '\0';
+ his_quote = K_ESCAPE;
+
+ /* ignore last character if it filled the buffer */
+ if (send_ptr == &send_parms[SEND_DATA_SIZE - 1])
+ --send_ptr;
+ bytes = send_ptr - send_parms; /* how many bytes we'll process */
+ do {
+ if (bytes-- <= 0)
+ break;
+ /* handle MAXL - max length */
+ /* ignore what he says - most I'll take (here) is 94 */
+ a_b[++length] = tochar (94);
+ if (bytes-- <= 0)
+ break;
+ /* handle TIME - time you should wait for my packets */
+ /* ignore what he says - don't wait for my ack longer than 1 second */
+ a_b[++length] = tochar (1);
+ if (bytes-- <= 0)
+ break;
+ /* handle NPAD - number of pad chars I need */
+ /* remember what he says - I need none */
+ his_pad_count = untochar (send_parms[2]);
+ a_b[++length] = tochar (0);
+ if (bytes-- <= 0)
+ break;
+ /* handle PADC - pad chars I need */
+ /* remember what he says - I need none */
+ his_pad_char = ktrans (send_parms[3]);
+ a_b[++length] = 0x40; /* He should ignore this */
+ if (bytes-- <= 0)
+ break;
+ /* handle EOL - end of line he needs */
+ /* remember what he says - I need CR */
+ his_eol = untochar (send_parms[4]);
+ a_b[++length] = tochar (END_CHAR);
+ if (bytes-- <= 0)
+ break;
+ /* handle QCTL - quote control char he'll use */
+ /* remember what he says - I'll use '#' */
+ his_quote = send_parms[5];
+ a_b[++length] = '#';
+ if (bytes-- <= 0)
+ break;
+ /* handle QBIN - 8-th bit prefixing */
+ /* ignore what he says - I refuse */
+ a_b[++length] = 'N';
+ if (bytes-- <= 0)
+ break;
+ /* handle CHKT - the clock check type */
+ /* ignore what he says - I do type 1 (for now) */
+ a_b[++length] = '1';
+ if (bytes-- <= 0)
+ break;
+ /* handle REPT - the repeat prefix */
+ /* ignore what he says - I refuse (for now) */
+ a_b[++length] = 'N';
+ if (bytes-- <= 0)
+ break;
+ /* handle CAPAS - the capabilities mask */
+ /* ignore what he says - I only do long packets - I don't do windows */
+ a_b[++length] = tochar (2); /* only long packets */
+ a_b[++length] = tochar (0); /* no windows */
+ a_b[++length] = tochar (94); /* large packet msb */
+ a_b[++length] = tochar (94); /* large packet lsb */
+ } while (0);
+
+ a_b[0] = START_CHAR;
+ a_b[1] = tochar (length);
+ a_b[2] = tochar (n);
+ a_b[3] = ACK_TYPE;
+ a_b[++length] = '\0';
+ a_b[length] = tochar (chk1 (&a_b[1]));
+ a_b[++length] = his_eol;
+ a_b[++length] = '\0';
+ s1_sendpacket (a_b);
+}
+
+/* k_recv receives a OS Open image file over kermit line */
+static int k_recv (void)
+{
+ char new_char;
+ char k_state, k_state_saved;
+ int sum;
+ int done;
+ int length;
+ int n, last_n;
+ int z = 0;
+ int len_lo, len_hi;
+
+ /* initialize some protocol parameters */
+ his_eol = END_CHAR; /* default end of line character */
+ his_pad_count = 0;
+ his_pad_char = '\0';
+ his_quote = K_ESCAPE;
+
+ /* initialize the k_recv and k_data state machine */
+ done = 0;
+ k_state = 0;
+ k_data_init ();
+ k_state_saved = k_state;
+ k_data_save ();
+ n = 0; /* just to get rid of a warning */
+ last_n = -1;
+
+ /* expect this "type" sequence (but don't check):
+ S: send initiate
+ F: file header
+ D: data (multiple)
+ Z: end of file
+ B: break transmission
+ */
+
+ /* enter main loop */
+ while (!done) {
+ /* set the send packet pointer to begining of send packet parms */
+ send_ptr = send_parms;
+
+ /* With each packet, start summing the bytes starting with the length.
+ Save the current sequence number.
+ Note the type of the packet.
+ If a character less than SPACE (0x20) is received - error.
+ */
+
+#if 0
+ /* OLD CODE, Prior to checking sequence numbers */
+ /* first have all state machines save current states */
+ k_state_saved = k_state;
+ k_data_save ();
+#endif
+
+ /* get a packet */
+ /* wait for the starting character or ^C */
+ for (;;) {
+ switch (getc ()) {
+ case START_CHAR: /* start packet */
+ goto START;
+ case ETX_CHAR: /* ^C waiting for packet */
+ return (0);
+ default:
+ ;
+ }
+ }
+START:
+ /* get length of packet */
+ sum = 0;
+ new_char = getc ();
+ if ((new_char & 0xE0) == 0)
+ goto packet_error;
+ sum += new_char & 0xff;
+ length = untochar (new_char);
+ /* get sequence number */
+ new_char = getc ();
+ if ((new_char & 0xE0) == 0)
+ goto packet_error;
+ sum += new_char & 0xff;
+ n = untochar (new_char);
+ --length;
+
+ /* NEW CODE - check sequence numbers for retried packets */
+ /* Note - this new code assumes that the sequence number is correctly
+ * received. Handling an invalid sequence number adds another layer
+ * of complexity that may not be needed - yet! At this time, I'm hoping
+ * that I don't need to buffer the incoming data packets and can write
+ * the data into memory in real time.
+ */
+ if (n == last_n) {
+ /* same sequence number, restore the previous state */
+ k_state = k_state_saved;
+ k_data_restore ();
+ } else {
+ /* new sequence number, checkpoint the download */
+ last_n = n;
+ k_state_saved = k_state;
+ k_data_save ();
+ }
+ /* END NEW CODE */
+
+ /* get packet type */
+ new_char = getc ();
+ if ((new_char & 0xE0) == 0)
+ goto packet_error;
+ sum += new_char & 0xff;
+ k_state = new_char;
+ --length;
+ /* check for extended length */
+ if (length == -2) {
+ /* (length byte was 0, decremented twice) */
+ /* get the two length bytes */
+ new_char = getc ();
+ if ((new_char & 0xE0) == 0)
+ goto packet_error;
+ sum += new_char & 0xff;
+ len_hi = untochar (new_char);
+ new_char = getc ();
+ if ((new_char & 0xE0) == 0)
+ goto packet_error;
+ sum += new_char & 0xff;
+ len_lo = untochar (new_char);
+ length = len_hi * 95 + len_lo;
+ /* check header checksum */
+ new_char = getc ();
+ if ((new_char & 0xE0) == 0)
+ goto packet_error;
+ if (new_char != tochar ((sum + ((sum >> 6) & 0x03)) & 0x3f))
+ goto packet_error;
+ sum += new_char & 0xff;
+/* --length; */ /* new length includes only data and block check to come */
+ }
+ /* bring in rest of packet */
+ while (length > 1) {
+ new_char = getc ();
+ if ((new_char & 0xE0) == 0)
+ goto packet_error;
+ sum += new_char & 0xff;
+ --length;
+ if (k_state == DATA_TYPE) {
+ /* pass on the data if this is a data packet */
+ k_data_char (new_char);
+ } else if (k_state == SEND_TYPE) {
+ /* save send pack in buffer as is */
+ *send_ptr++ = new_char;
+ /* if too much data, back off the pointer */
+ if (send_ptr >= &send_parms[SEND_DATA_SIZE])
+ --send_ptr;
+ }
+ }
+ /* get and validate checksum character */
+ new_char = getc ();
+ if ((new_char & 0xE0) == 0)
+ goto packet_error;
+ if (new_char != tochar ((sum + ((sum >> 6) & 0x03)) & 0x3f))
+ goto packet_error;
+ /* get END_CHAR */
+ new_char = getc ();
+ if (new_char != END_CHAR) {
+ packet_error:
+ /* restore state machines */
+ k_state = k_state_saved;
+ k_data_restore ();
+ /* send a negative acknowledge packet in */
+ send_nack (n);
+ } else if (k_state == SEND_TYPE) {
+ /* crack the protocol parms, build an appropriate ack packet */
+ handle_send_packet (n);
+ } else {
+ /* send simple acknowledge packet in */
+ send_ack (n);
+ /* quit if end of transmission */
+ if (k_state == BREAK_TYPE)
+ done = 1;
+ }
+ ++z;
+ }
+ return ((ulong) os_data_addr - (ulong) bin_start_address);
+}
git.openpandora.org / pandora-x-loader.git / commitdiff