--- /dev/null
+/*
+ * (C) Copyright 2002
+ * Rich Ireland, Enterasys Networks, rireland@enterasys.com.
+ * Keith Outwater, keith_outwater@mvis.com
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+/*
+ * Configuration support for Xilinx Virtex2 devices. Based
+ * on spartan2.c (Rich Ireland, rireland@enterasys.com).
+ */
+
+#include <common.h>
+#include <virtex2.h>
+
+#if 0
+#define FPGA_DEBUG
+#endif
+
+#ifdef FPGA_DEBUG
+#define PRINTF(fmt,args...) printf (fmt ,##args)
+#else
+#define PRINTF(fmt,args...)
+#endif
+
+/*
+ * If the SelectMap interface can be overrun by the processor, define
+ * CONFIG_SYS_FPGA_CHECK_BUSY and/or CONFIG_FPGA_DELAY in the board configuration
+ * file and add board-specific support for checking BUSY status. By default,
+ * assume that the SelectMap interface cannot be overrun.
+ */
+#ifndef CONFIG_SYS_FPGA_CHECK_BUSY
+#undef CONFIG_SYS_FPGA_CHECK_BUSY
+#endif
+
+#ifndef CONFIG_FPGA_DELAY
+#define CONFIG_FPGA_DELAY()
+#endif
+
+#ifndef CONFIG_SYS_FPGA_PROG_FEEDBACK
+#define CONFIG_SYS_FPGA_PROG_FEEDBACK
+#endif
+
+/*
+ * Don't allow config cycle to be interrupted
+ */
+#ifndef CONFIG_SYS_FPGA_CHECK_CTRLC
+#undef CONFIG_SYS_FPGA_CHECK_CTRLC
+#endif
+
+/*
+ * Check for errors during configuration by default
+ */
+#ifndef CONFIG_SYS_FPGA_CHECK_ERROR
+#define CONFIG_SYS_FPGA_CHECK_ERROR
+#endif
+
+/*
+ * The default timeout in mS for INIT_B to deassert after PROG_B has
+ * been deasserted. Per the latest Virtex II Handbook (page 347), the
+ * max time from PORG_B deassertion to INIT_B deassertion is 4uS per
+ * data frame for the XC2V8000. The XC2V8000 has 2860 data frames
+ * which yields 11.44 mS. So let's make it bigger in order to handle
+ * an XC2V1000, if anyone can ever get ahold of one.
+ */
+#ifndef CONFIG_SYS_FPGA_WAIT_INIT
+#define CONFIG_SYS_FPGA_WAIT_INIT CONFIG_SYS_HZ/2 /* 500 ms */
+#endif
+
+/*
+ * The default timeout for waiting for BUSY to deassert during configuration.
+ * This is normally not necessary since for most reasonable configuration
+ * clock frequencies (i.e. 66 MHz or less), BUSY monitoring is unnecessary.
+ */
+#ifndef CONFIG_SYS_FPGA_WAIT_BUSY
+#define CONFIG_SYS_FPGA_WAIT_BUSY CONFIG_SYS_HZ/200 /* 5 ms*/
+#endif
+
+/* Default timeout for waiting for FPGA to enter operational mode after
+ * configuration data has been written.
+ */
+#ifndef CONFIG_SYS_FPGA_WAIT_CONFIG
+#define CONFIG_SYS_FPGA_WAIT_CONFIG CONFIG_SYS_HZ/5 /* 200 ms */
+#endif
+
+static int virtex2_ssm_load(xilinx_desc *desc, const void *buf, size_t bsize);
+static int virtex2_ssm_dump(xilinx_desc *desc, const void *buf, size_t bsize);
+
+static int virtex2_ss_load(xilinx_desc *desc, const void *buf, size_t bsize);
+static int virtex2_ss_dump(xilinx_desc *desc, const void *buf, size_t bsize);
+
+static int virtex2_load(xilinx_desc *desc, const void *buf, size_t bsize)
+{
+ int ret_val = FPGA_FAIL;
+
+ switch (desc->iface) {
+ case slave_serial:
+ PRINTF ("%s: Launching Slave Serial Load\n", __FUNCTION__);
+ ret_val = virtex2_ss_load(desc, buf, bsize);
+ break;
+
+ case slave_selectmap:
+ PRINTF ("%s: Launching Slave Parallel Load\n", __FUNCTION__);
+ ret_val = virtex2_ssm_load(desc, buf, bsize);
+ break;
+
+ default:
+ printf ("%s: Unsupported interface type, %d\n",
+ __FUNCTION__, desc->iface);
+ }
+ return ret_val;
+}
+
+static int virtex2_dump(xilinx_desc *desc, const void *buf, size_t bsize)
+{
+ int ret_val = FPGA_FAIL;
+
+ switch (desc->iface) {
+ case slave_serial:
+ PRINTF ("%s: Launching Slave Serial Dump\n", __FUNCTION__);
+ ret_val = virtex2_ss_dump(desc, buf, bsize);
+ break;
+
+ case slave_parallel:
+ PRINTF ("%s: Launching Slave Parallel Dump\n", __FUNCTION__);
+ ret_val = virtex2_ssm_dump(desc, buf, bsize);
+ break;
+
+ default:
+ printf ("%s: Unsupported interface type, %d\n",
+ __FUNCTION__, desc->iface);
+ }
+ return ret_val;
+}
+
+static int virtex2_info(xilinx_desc *desc)
+{
+ return FPGA_SUCCESS;
+}
+
+/*
+ * Virtex-II Slave SelectMap configuration loader. Configuration via
+ * SelectMap is as follows:
+ * 1. Set the FPGA's PROG_B line low.
+ * 2. Set the FPGA's PROG_B line high. Wait for INIT_B to go high.
+ * 3. Write data to the SelectMap port. If INIT_B goes low at any time
+ * this process, a configuration error (most likely CRC failure) has
+ * ocurred. At this point a status word may be read from the
+ * SelectMap interface to determine the source of the problem (You
+ * could, for instance, put this in your 'abort' function handler).
+ * 4. After all data has been written, test the state of the FPGA
+ * INIT_B and DONE lines. If both are high, configuration has
+ * succeeded. Congratulations!
+ */
+static int virtex2_ssm_load(xilinx_desc *desc, const void *buf, size_t bsize)
+{
+ int ret_val = FPGA_FAIL;
+ xilinx_virtex2_slave_selectmap_fns *fn = desc->iface_fns;
+
+ PRINTF ("%s:%d: Start with interface functions @ 0x%p\n",
+ __FUNCTION__, __LINE__, fn);
+
+ if (fn) {
+ size_t bytecount = 0;
+ unsigned char *data = (unsigned char *) buf;
+ int cookie = desc->cookie;
+ unsigned long ts;
+
+ /* Gotta split this one up (so the stack won't blow??) */
+ PRINTF ("%s:%d: Function Table:\n"
+ " base 0x%p\n"
+ " struct 0x%p\n"
+ " pre 0x%p\n"
+ " prog 0x%p\n"
+ " init 0x%p\n"
+ " error 0x%p\n",
+ __FUNCTION__, __LINE__,
+ &fn, fn, fn->pre, fn->pgm, fn->init, fn->err);
+ PRINTF (" clock 0x%p\n"
+ " cs 0x%p\n"
+ " write 0x%p\n"
+ " rdata 0x%p\n"
+ " wdata 0x%p\n"
+ " busy 0x%p\n"
+ " abort 0x%p\n"
+ " post 0x%p\n\n",
+ fn->clk, fn->cs, fn->wr, fn->rdata, fn->wdata,
+ fn->busy, fn->abort, fn->post);
+
+#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
+ printf ("Initializing FPGA Device %d...\n", cookie);
+#endif
+ /*
+ * Run the pre configuration function if there is one.
+ */
+ if (*fn->pre) {
+ (*fn->pre) (cookie);
+ }
+
+ /*
+ * Assert the program line. The minimum pulse width for
+ * Virtex II devices is 300 nS (Tprogram parameter in datasheet).
+ * There is no maximum value for the pulse width. Check to make
+ * sure that INIT_B goes low after assertion of PROG_B
+ */
+ (*fn->pgm) (true, true, cookie);
+ udelay (10);
+ ts = get_timer (0);
+ do {
+ if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT_INIT) {
+ printf ("%s:%d: ** Timeout after %d ticks waiting for INIT"
+ " to assert.\n", __FUNCTION__, __LINE__,
+ CONFIG_SYS_FPGA_WAIT_INIT);
+ (*fn->abort) (cookie);
+ return FPGA_FAIL;
+ }
+ } while (!(*fn->init) (cookie));
+
+ (*fn->pgm) (false, true, cookie);
+ CONFIG_FPGA_DELAY ();
+ (*fn->clk) (true, true, cookie);
+
+ /*
+ * Start a timer and wait for INIT_B to go high
+ */
+ ts = get_timer (0);
+ do {
+ CONFIG_FPGA_DELAY ();
+ if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT_INIT) {
+ printf ("%s:%d: ** Timeout after %d ticks waiting for INIT"
+ " to deassert.\n", __FUNCTION__, __LINE__,
+ CONFIG_SYS_FPGA_WAIT_INIT);
+ (*fn->abort) (cookie);
+ return FPGA_FAIL;
+ }
+ } while ((*fn->init) (cookie) && (*fn->busy) (cookie));
+
+ (*fn->wr) (true, true, cookie);
+ (*fn->cs) (true, true, cookie);
+
+ udelay (10000);
+
+ /*
+ * Load the data byte by byte
+ */
+ while (bytecount < bsize) {
+#ifdef CONFIG_SYS_FPGA_CHECK_CTRLC
+ if (ctrlc ()) {
+ (*fn->abort) (cookie);
+ return FPGA_FAIL;
+ }
+#endif
+
+ if ((*fn->done) (cookie) == FPGA_SUCCESS) {
+ PRINTF ("%s:%d:done went active early, bytecount = %d\n",
+ __FUNCTION__, __LINE__, bytecount);
+ break;
+ }
+
+#ifdef CONFIG_SYS_FPGA_CHECK_ERROR
+ if ((*fn->init) (cookie)) {
+ printf ("\n%s:%d: ** Error: INIT asserted during"
+ " configuration\n", __FUNCTION__, __LINE__);
+ printf ("%d = buffer offset, %d = buffer size\n",
+ bytecount, bsize);
+ (*fn->abort) (cookie);
+ return FPGA_FAIL;
+ }
+#endif
+
+ (*fn->wdata) (data[bytecount++], true, cookie);
+ CONFIG_FPGA_DELAY ();
+
+ /*
+ * Cycle the clock pin
+ */
+ (*fn->clk) (false, true, cookie);
+ CONFIG_FPGA_DELAY ();
+ (*fn->clk) (true, true, cookie);
+
+#ifdef CONFIG_SYS_FPGA_CHECK_BUSY
+ ts = get_timer (0);
+ while ((*fn->busy) (cookie)) {
+ if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT_BUSY) {
+ printf ("%s:%d: ** Timeout after %d ticks waiting for"
+ " BUSY to deassert\n",
+ __FUNCTION__, __LINE__, CONFIG_SYS_FPGA_WAIT_BUSY);
+ (*fn->abort) (cookie);
+ return FPGA_FAIL;
+ }
+ }
+#endif
+
+#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
+ if (bytecount % (bsize / 40) == 0)
+ putc ('.');
+#endif
+ }
+
+ /*
+ * Finished writing the data; deassert FPGA CS_B and WRITE_B signals.
+ */
+ CONFIG_FPGA_DELAY ();
+ (*fn->cs) (false, true, cookie);
+ (*fn->wr) (false, true, cookie);
+
+#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
+ putc ('\n');
+#endif
+
+ /*
+ * Check for successful configuration. FPGA INIT_B and DONE should
+ * both be high upon successful configuration.
+ */
+ ts = get_timer (0);
+ ret_val = FPGA_SUCCESS;
+ while (((*fn->done) (cookie) == FPGA_FAIL) || (*fn->init) (cookie)) {
+ if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT_CONFIG) {
+ printf ("%s:%d: ** Timeout after %d ticks waiting for DONE to"
+ "assert and INIT to deassert\n",
+ __FUNCTION__, __LINE__, CONFIG_SYS_FPGA_WAIT_CONFIG);
+ (*fn->abort) (cookie);
+ ret_val = FPGA_FAIL;
+ break;
+ }
+ }
+
+ if (ret_val == FPGA_SUCCESS) {
+#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
+ printf ("Initialization of FPGA device %d complete\n", cookie);
+#endif
+ /*
+ * Run the post configuration function if there is one.
+ */
+ if (*fn->post) {
+ (*fn->post) (cookie);
+ }
+ } else {
+#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
+ printf ("** Initialization of FPGA device %d FAILED\n",
+ cookie);
+#endif
+ }
+ } else {
+ printf ("%s:%d: NULL Interface function table!\n",
+ __FUNCTION__, __LINE__);
+ }
+ return ret_val;
+}
+
+/*
+ * Read the FPGA configuration data
+ */
+static int virtex2_ssm_dump(xilinx_desc *desc, const void *buf, size_t bsize)
+{
+ int ret_val = FPGA_FAIL;
+ xilinx_virtex2_slave_selectmap_fns *fn = desc->iface_fns;
+
+ if (fn) {
+ unsigned char *data = (unsigned char *) buf;
+ size_t bytecount = 0;
+ int cookie = desc->cookie;
+
+ printf ("Starting Dump of FPGA Device %d...\n", cookie);
+
+ (*fn->cs) (true, true, cookie);
+ (*fn->clk) (true, true, cookie);
+
+ while (bytecount < bsize) {
+#ifdef CONFIG_SYS_FPGA_CHECK_CTRLC
+ if (ctrlc ()) {
+ (*fn->abort) (cookie);
+ return FPGA_FAIL;
+ }
+#endif
+ /*
+ * Cycle the clock and read the data
+ */
+ (*fn->clk) (false, true, cookie);
+ (*fn->clk) (true, true, cookie);
+ (*fn->rdata) (&(data[bytecount++]), cookie);
+#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
+ if (bytecount % (bsize / 40) == 0)
+ putc ('.');
+#endif
+ }
+
+ /*
+ * Deassert CS_B and cycle the clock to deselect the device.
+ */
+ (*fn->cs) (false, false, cookie);
+ (*fn->clk) (false, true, cookie);
+ (*fn->clk) (true, true, cookie);
+
+#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
+ putc ('\n');
+#endif
+ puts ("Done.\n");
+ } else {
+ printf ("%s:%d: NULL Interface function table!\n",
+ __FUNCTION__, __LINE__);
+ }
+ return ret_val;
+}
+
+static int virtex2_ss_load(xilinx_desc *desc, const void *buf, size_t bsize)
+{
+ printf ("%s: Slave Serial Loading is unsupported\n", __FUNCTION__);
+ return FPGA_FAIL;
+}
+
+static int virtex2_ss_dump(xilinx_desc *desc, const void *buf, size_t bsize)
+{
+ printf ("%s: Slave Serial Dumping is unsupported\n", __FUNCTION__);
+ return FPGA_FAIL;
+}
+
+/* vim: set ts=4 tw=78: */
+
+struct xilinx_fpga_op virtex2_op = {
+ .load = virtex2_load,
+ .dump = virtex2_dump,
+ .info = virtex2_info,
+};
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