+ if (readqueue_pos == 0) {
+ /* simply debugging by allowing easy breakpoints when there
+ * is something to do. */
+ return;
+ }
+ int i;
+ tcpip_open();
+ for (i = 0; i < readqueue_pos; i++) {
+ uint32_t value;
+ if (!readLong(&value)) {
+ fprintf(stderr, "Could not read from zy1000 server\n");
+ exit(-1);
+ }
+
+ uint8_t *in_value = readqueue[i].dest;
+ int k = readqueue[i].bits;
+
+ /* we're shifting in data to MSB, shift data to be aligned for returning the value */
+ value >>= 32-k;
+
+ for (int l = 0; l < k; l += 8)
+ in_value[l/8] = (value >> l)&0xff;
+ }
+ readqueue_pos = 0;
+}
+
+/* By queuing the callback's we avoid flushing the
+ * read queue until jtag_execute_queue(). This can
+ * reduce latency dramatically for cases where
+ * callbacks are used extensively.
+*/
+#define callbackqueue_size 128
+static struct callbackentry {
+ jtag_callback_t callback;
+ jtag_callback_data_t data0;
+ jtag_callback_data_t data1;
+ jtag_callback_data_t data2;
+ jtag_callback_data_t data3;
+} callbackqueue[callbackqueue_size];
+
+static int callbackqueue_pos;
+
+void zy1000_jtag_add_callback4(jtag_callback_t callback,
+ jtag_callback_data_t data0,
+ jtag_callback_data_t data1,
+ jtag_callback_data_t data2,
+ jtag_callback_data_t data3)
+{
+ if (callbackqueue_pos >= callbackqueue_size)
+ zy1000_flush_callbackqueue();
+
+ callbackqueue[callbackqueue_pos].callback = callback;
+ callbackqueue[callbackqueue_pos].data0 = data0;
+ callbackqueue[callbackqueue_pos].data1 = data1;
+ callbackqueue[callbackqueue_pos].data2 = data2;
+ callbackqueue[callbackqueue_pos].data3 = data3;
+ callbackqueue_pos++;
+
+ /* KLUDGE!
+ * make callbacks synchronous for now as minidriver requires callback
+ * to be synchronous.
+ *
+ * We can get away with making read and writes asynchronous so we
+ * don't completely kill performance.
+ */
+ zy1000_flush_callbackqueue();
+}
+
+static int zy1000_jtag_convert_to_callback4(jtag_callback_data_t data0,
+ jtag_callback_data_t data1,
+ jtag_callback_data_t data2,
+ jtag_callback_data_t data3)
+{
+ ((jtag_callback1_t)data1)(data0);
+ return ERROR_OK;
+}
+
+void zy1000_jtag_add_callback(jtag_callback1_t callback, jtag_callback_data_t data0)
+{
+ zy1000_jtag_add_callback4(zy1000_jtag_convert_to_callback4,
+ data0,
+ (jtag_callback_data_t)callback,
+ 0,
+ 0);
+}
+
+void zy1000_flush_callbackqueue(void)
+{
+ /* we have to flush the read queue so we have access to
+ the data the callbacks will use
+ */
+ zy1000_flush_readqueue();
+ int i;
+ for (i = 0; i < callbackqueue_pos; i++) {
+ struct callbackentry *entry = &callbackqueue[i];
+ jtag_set_error(entry->callback(entry->data0, entry->data1, entry->data2,
+ entry->data3));
+ }
+ callbackqueue_pos = 0;
+}
+
+static void writeShiftValue(uint8_t *data, int bits)
+{
+ waitIdle();
+
+ if (!writeLong((ZY1000_CMD_PEEK << 24) | (ZY1000_JTAG_BASE + 0xc))) {
+ fprintf(stderr, "Could not read from zy1000 server\n");
+ exit(-1);
+ }
+
+ if (readqueue_pos >= readqueue_size)
+ zy1000_flush_readqueue();
+
+ readqueue[readqueue_pos].dest = data;
+ readqueue[readqueue_pos].bits = bits;
+ readqueue_pos++;
+
+ /* KLUDGE!!! minidriver requires readqueue to be synchronous */
+ zy1000_flush_readqueue();
+}
+
+#else
+
+static void writeShiftValue(uint8_t *data, int bits)
+{
+ uint32_t value;
+ waitIdle();
+ ZY1000_PEEK(ZY1000_JTAG_BASE + 0xc, value);
+ VERBOSE(LOG_INFO("getShiftValue %08x", value));
+
+ /* data in, LSB to MSB */
+ /* we're shifting in data to MSB, shift data to be aligned for returning the value */
+ value >>= 32 - bits;
+
+ for (int l = 0; l < bits; l += 8)
+ data[l/8] = (value >> l)&0xff;
+}
+
+#endif
+
+#if BUILD_ZY1000_MASTER
+
+#ifdef WATCHDOG_BASE
+/* If we connect to port 8888 we must send a char every 10s or the board resets itself */
+static void watchdog_server(cyg_addrword_t data)
+{
+ int so_reuseaddr_option = 1;
+
+ int fd = socket(AF_INET, SOCK_STREAM, 0);
+ if (fd == -1) {
+ LOG_ERROR("error creating socket: %s", strerror(errno));
+ exit(-1);
+ }
+
+ setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (void *) &so_reuseaddr_option,
+ sizeof(int));
+
+ struct sockaddr_in sin;
+ unsigned int address_size;
+ address_size = sizeof(sin);
+ memset(&sin, 0, sizeof(sin));
+ sin.sin_family = AF_INET;
+ sin.sin_addr.s_addr = INADDR_ANY;
+ sin.sin_port = htons(8888);
+
+ if (bind(fd, (struct sockaddr *) &sin, sizeof(sin)) == -1) {
+ LOG_ERROR("couldn't bind to socket: %s", strerror(errno));
+ exit(-1);
+ }
+
+ if (listen(fd, 1) == -1) {
+ LOG_ERROR("couldn't listen on socket: %s", strerror(errno));
+ exit(-1);
+ }
+
+
+ for (;; ) {
+ int watchdog_ip = accept(fd, (struct sockaddr *) &sin, &address_size);
+
+ /* Start watchdog, must be reset every 10 seconds. */
+ HAL_WRITE_UINT32(WATCHDOG_BASE + 4, 4);
+
+ if (watchdog_ip < 0) {
+ LOG_ERROR("couldn't open watchdog socket: %s", strerror(errno));
+ exit(-1);
+ }
+
+ int flag = 1;
+ setsockopt(watchdog_ip, /* socket affected */
+ IPPROTO_TCP, /* set option at TCP level */
+ TCP_NODELAY, /* name of option */
+ (char *)&flag, /* the cast is historical cruft */
+ sizeof(int)); /* length of option value */
+
+
+ char buf;
+ for (;; ) {
+ if (read(watchdog_ip, &buf, 1) == 1) {
+ /* Reset timer */
+ HAL_WRITE_UINT32(WATCHDOG_BASE + 8, 0x1234);
+ /* Echo so we can telnet in and see that resetting works */
+ write(watchdog_ip, &buf, 1);
+ } else {
+ /* Stop tickling the watchdog, the CPU will reset in < 10 seconds
+ * now.
+ */
+ return;
+ }
+
+ }
+
+ /* Never reached */
+ }
+}
+#endif
+
+#endif
+
+#if BUILD_ZY1000_MASTER
+int interface_jtag_add_sleep(uint32_t us)
+{
+ jtag_sleep(us);
+ return ERROR_OK;
+}
+#endif
+
+#if BUILD_ZY1000_MASTER
+volatile void *zy1000_jtag_master;
+#include <sys/mman.h>
+#endif
+
+int zy1000_init(void)
+{
+#if BUILD_ZY1000_MASTER
+ int fd = open("/dev/mem", O_RDWR | O_SYNC);
+ if (fd == -1) {
+ LOG_ERROR("No access to /dev/mem");
+ return ERROR_FAIL;
+ }
+#ifndef REGISTERS_BASE
+#define REGISTERS_BASE 0x9002000
+#define REGISTERS_SPAN 128
+#endif
+
+ zy1000_jtag_master = mmap(0,
+ REGISTERS_SPAN,
+ PROT_READ | PROT_WRITE,
+ MAP_SHARED,
+ fd,
+ REGISTERS_BASE);
+
+ if (zy1000_jtag_master == (void *) -1) {
+ close(fd);
+ LOG_ERROR("No access to /dev/mem");
+ return ERROR_FAIL;
+ }
+#endif
+
+ ZY1000_POKE(ZY1000_JTAG_BASE + 0x10, 0x30); /* Turn on LED1 & LED2 */
+
+ setPower(true); /* on by default */
+
+ /* deassert resets. Important to avoid infinite loop waiting for SRST to deassert */
+ zy1000_reset(0, 0);
+
+ return ERROR_OK;
+}
+
+struct jtag_interface zy1000_interface = {