3 * Rich Ireland, Enterasys Networks, rireland@enterasys.com.
4 * Keith Outwater, keith_outwater@mvis.com
6 * SPDX-License-Identifier: GPL-2.0+
10 * Configuration support for Xilinx Virtex2 devices. Based
11 * on spartan2.c (Rich Ireland, rireland@enterasys.com).
22 #define PRINTF(fmt,args...) printf (fmt ,##args)
24 #define PRINTF(fmt,args...)
28 * If the SelectMap interface can be overrun by the processor, define
29 * CONFIG_SYS_FPGA_CHECK_BUSY and/or CONFIG_FPGA_DELAY in the board configuration
30 * file and add board-specific support for checking BUSY status. By default,
31 * assume that the SelectMap interface cannot be overrun.
33 #ifndef CONFIG_SYS_FPGA_CHECK_BUSY
34 #undef CONFIG_SYS_FPGA_CHECK_BUSY
37 #ifndef CONFIG_FPGA_DELAY
38 #define CONFIG_FPGA_DELAY()
41 #ifndef CONFIG_SYS_FPGA_PROG_FEEDBACK
42 #define CONFIG_SYS_FPGA_PROG_FEEDBACK
46 * Don't allow config cycle to be interrupted
48 #ifndef CONFIG_SYS_FPGA_CHECK_CTRLC
49 #undef CONFIG_SYS_FPGA_CHECK_CTRLC
53 * Check for errors during configuration by default
55 #ifndef CONFIG_SYS_FPGA_CHECK_ERROR
56 #define CONFIG_SYS_FPGA_CHECK_ERROR
60 * The default timeout in mS for INIT_B to deassert after PROG_B has
61 * been deasserted. Per the latest Virtex II Handbook (page 347), the
62 * max time from PORG_B deassertion to INIT_B deassertion is 4uS per
63 * data frame for the XC2V8000. The XC2V8000 has 2860 data frames
64 * which yields 11.44 mS. So let's make it bigger in order to handle
65 * an XC2V1000, if anyone can ever get ahold of one.
67 #ifndef CONFIG_SYS_FPGA_WAIT_INIT
68 #define CONFIG_SYS_FPGA_WAIT_INIT CONFIG_SYS_HZ/2 /* 500 ms */
72 * The default timeout for waiting for BUSY to deassert during configuration.
73 * This is normally not necessary since for most reasonable configuration
74 * clock frequencies (i.e. 66 MHz or less), BUSY monitoring is unnecessary.
76 #ifndef CONFIG_SYS_FPGA_WAIT_BUSY
77 #define CONFIG_SYS_FPGA_WAIT_BUSY CONFIG_SYS_HZ/200 /* 5 ms*/
80 /* Default timeout for waiting for FPGA to enter operational mode after
81 * configuration data has been written.
83 #ifndef CONFIG_SYS_FPGA_WAIT_CONFIG
84 #define CONFIG_SYS_FPGA_WAIT_CONFIG CONFIG_SYS_HZ/5 /* 200 ms */
87 static int virtex2_ssm_load(xilinx_desc *desc, const void *buf, size_t bsize);
88 static int virtex2_ssm_dump(xilinx_desc *desc, const void *buf, size_t bsize);
90 static int virtex2_ss_load(xilinx_desc *desc, const void *buf, size_t bsize);
91 static int virtex2_ss_dump(xilinx_desc *desc, const void *buf, size_t bsize);
93 static int virtex2_load(xilinx_desc *desc, const void *buf, size_t bsize,
94 bitstream_type bstype)
96 int ret_val = FPGA_FAIL;
98 switch (desc->iface) {
100 PRINTF ("%s: Launching Slave Serial Load\n", __FUNCTION__);
101 ret_val = virtex2_ss_load(desc, buf, bsize);
104 case slave_selectmap:
105 PRINTF ("%s: Launching Slave Parallel Load\n", __FUNCTION__);
106 ret_val = virtex2_ssm_load(desc, buf, bsize);
110 printf ("%s: Unsupported interface type, %d\n",
111 __FUNCTION__, desc->iface);
116 static int virtex2_dump(xilinx_desc *desc, const void *buf, size_t bsize)
118 int ret_val = FPGA_FAIL;
120 switch (desc->iface) {
122 PRINTF ("%s: Launching Slave Serial Dump\n", __FUNCTION__);
123 ret_val = virtex2_ss_dump(desc, buf, bsize);
127 PRINTF ("%s: Launching Slave Parallel Dump\n", __FUNCTION__);
128 ret_val = virtex2_ssm_dump(desc, buf, bsize);
132 printf ("%s: Unsupported interface type, %d\n",
133 __FUNCTION__, desc->iface);
138 static int virtex2_info(xilinx_desc *desc)
144 * Virtex-II Slave SelectMap configuration loader. Configuration via
145 * SelectMap is as follows:
146 * 1. Set the FPGA's PROG_B line low.
147 * 2. Set the FPGA's PROG_B line high. Wait for INIT_B to go high.
148 * 3. Write data to the SelectMap port. If INIT_B goes low at any time
149 * this process, a configuration error (most likely CRC failure) has
150 * ocurred. At this point a status word may be read from the
151 * SelectMap interface to determine the source of the problem (You
152 * could, for instance, put this in your 'abort' function handler).
153 * 4. After all data has been written, test the state of the FPGA
154 * INIT_B and DONE lines. If both are high, configuration has
155 * succeeded. Congratulations!
157 static int virtex2_ssm_load(xilinx_desc *desc, const void *buf, size_t bsize)
159 int ret_val = FPGA_FAIL;
160 xilinx_virtex2_slave_selectmap_fns *fn = desc->iface_fns;
162 PRINTF ("%s:%d: Start with interface functions @ 0x%p\n",
163 __FUNCTION__, __LINE__, fn);
166 size_t bytecount = 0;
167 unsigned char *data = (unsigned char *) buf;
168 int cookie = desc->cookie;
171 /* Gotta split this one up (so the stack won't blow??) */
172 PRINTF ("%s:%d: Function Table:\n"
179 __FUNCTION__, __LINE__,
180 &fn, fn, fn->pre, fn->pgm, fn->init, fn->err);
181 PRINTF (" clock 0x%p\n"
189 fn->clk, fn->cs, fn->wr, fn->rdata, fn->wdata,
190 fn->busy, fn->abort, fn->post);
192 #ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
193 printf ("Initializing FPGA Device %d...\n", cookie);
196 * Run the pre configuration function if there is one.
203 * Assert the program line. The minimum pulse width for
204 * Virtex II devices is 300 nS (Tprogram parameter in datasheet).
205 * There is no maximum value for the pulse width. Check to make
206 * sure that INIT_B goes low after assertion of PROG_B
208 (*fn->pgm) (true, true, cookie);
212 if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT_INIT) {
213 printf ("%s:%d: ** Timeout after %d ticks waiting for INIT"
214 " to assert.\n", __FUNCTION__, __LINE__,
215 CONFIG_SYS_FPGA_WAIT_INIT);
216 (*fn->abort) (cookie);
219 } while (!(*fn->init) (cookie));
221 (*fn->pgm) (false, true, cookie);
222 CONFIG_FPGA_DELAY ();
223 (*fn->clk) (true, true, cookie);
226 * Start a timer and wait for INIT_B to go high
230 CONFIG_FPGA_DELAY ();
231 if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT_INIT) {
232 printf ("%s:%d: ** Timeout after %d ticks waiting for INIT"
233 " to deassert.\n", __FUNCTION__, __LINE__,
234 CONFIG_SYS_FPGA_WAIT_INIT);
235 (*fn->abort) (cookie);
238 } while ((*fn->init) (cookie) && (*fn->busy) (cookie));
240 (*fn->wr) (true, true, cookie);
241 (*fn->cs) (true, true, cookie);
246 * Load the data byte by byte
248 while (bytecount < bsize) {
249 #ifdef CONFIG_SYS_FPGA_CHECK_CTRLC
251 (*fn->abort) (cookie);
256 if ((*fn->done) (cookie) == FPGA_SUCCESS) {
257 PRINTF ("%s:%d:done went active early, bytecount = %d\n",
258 __FUNCTION__, __LINE__, bytecount);
262 #ifdef CONFIG_SYS_FPGA_CHECK_ERROR
263 if ((*fn->init) (cookie)) {
264 printf ("\n%s:%d: ** Error: INIT asserted during"
265 " configuration\n", __FUNCTION__, __LINE__);
266 printf ("%d = buffer offset, %d = buffer size\n",
268 (*fn->abort) (cookie);
273 (*fn->wdata) (data[bytecount++], true, cookie);
274 CONFIG_FPGA_DELAY ();
277 * Cycle the clock pin
279 (*fn->clk) (false, true, cookie);
280 CONFIG_FPGA_DELAY ();
281 (*fn->clk) (true, true, cookie);
283 #ifdef CONFIG_SYS_FPGA_CHECK_BUSY
285 while ((*fn->busy) (cookie)) {
286 if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT_BUSY) {
287 printf ("%s:%d: ** Timeout after %d ticks waiting for"
288 " BUSY to deassert\n",
289 __FUNCTION__, __LINE__, CONFIG_SYS_FPGA_WAIT_BUSY);
290 (*fn->abort) (cookie);
296 #ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
297 if (bytecount % (bsize / 40) == 0)
303 * Finished writing the data; deassert FPGA CS_B and WRITE_B signals.
305 CONFIG_FPGA_DELAY ();
306 (*fn->cs) (false, true, cookie);
307 (*fn->wr) (false, true, cookie);
309 #ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
314 * Check for successful configuration. FPGA INIT_B and DONE should
315 * both be high upon successful configuration.
318 ret_val = FPGA_SUCCESS;
319 while (((*fn->done) (cookie) == FPGA_FAIL) || (*fn->init) (cookie)) {
320 if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT_CONFIG) {
321 printf ("%s:%d: ** Timeout after %d ticks waiting for DONE to"
322 "assert and INIT to deassert\n",
323 __FUNCTION__, __LINE__, CONFIG_SYS_FPGA_WAIT_CONFIG);
324 (*fn->abort) (cookie);
330 if (ret_val == FPGA_SUCCESS) {
331 #ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
332 printf ("Initialization of FPGA device %d complete\n", cookie);
335 * Run the post configuration function if there is one.
338 (*fn->post) (cookie);
341 #ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
342 printf ("** Initialization of FPGA device %d FAILED\n",
347 printf ("%s:%d: NULL Interface function table!\n",
348 __FUNCTION__, __LINE__);
354 * Read the FPGA configuration data
356 static int virtex2_ssm_dump(xilinx_desc *desc, const void *buf, size_t bsize)
358 int ret_val = FPGA_FAIL;
359 xilinx_virtex2_slave_selectmap_fns *fn = desc->iface_fns;
362 unsigned char *data = (unsigned char *) buf;
363 size_t bytecount = 0;
364 int cookie = desc->cookie;
366 printf ("Starting Dump of FPGA Device %d...\n", cookie);
368 (*fn->cs) (true, true, cookie);
369 (*fn->clk) (true, true, cookie);
371 while (bytecount < bsize) {
372 #ifdef CONFIG_SYS_FPGA_CHECK_CTRLC
374 (*fn->abort) (cookie);
379 * Cycle the clock and read the data
381 (*fn->clk) (false, true, cookie);
382 (*fn->clk) (true, true, cookie);
383 (*fn->rdata) (&(data[bytecount++]), cookie);
384 #ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
385 if (bytecount % (bsize / 40) == 0)
391 * Deassert CS_B and cycle the clock to deselect the device.
393 (*fn->cs) (false, false, cookie);
394 (*fn->clk) (false, true, cookie);
395 (*fn->clk) (true, true, cookie);
397 #ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
402 printf ("%s:%d: NULL Interface function table!\n",
403 __FUNCTION__, __LINE__);
408 static int virtex2_ss_load(xilinx_desc *desc, const void *buf, size_t bsize)
410 printf ("%s: Slave Serial Loading is unsupported\n", __FUNCTION__);
414 static int virtex2_ss_dump(xilinx_desc *desc, const void *buf, size_t bsize)
416 printf ("%s: Slave Serial Dumping is unsupported\n", __FUNCTION__);
420 /* vim: set ts=4 tw=78: */
422 struct xilinx_fpga_op virtex2_op = {
423 .load = virtex2_load,
424 .dump = virtex2_dump,
425 .info = virtex2_info,