[J-u-boot.git] / drivers / fpga / virtex2.c

/*
 * (C) Copyright 2002
 * Rich Ireland, Enterasys Networks, [email protected].
 * Keith Outwater, [email protected]
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

/*
 * Configuration support for Xilinx Virtex2 devices.  Based
 * on spartan2.c (Rich Ireland, [email protected]).
 */

#include <common.h>
#include <console.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,
			bitstream_type bstype)
{
	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,
};
Commit	Line	Data
5d3207da WD	1	/*
	2	* (C) Copyright 2002
	3	* Rich Ireland, Enterasys Networks, [email protected].
	4	* Keith Outwater, [email protected]
	5	*
1a459660	6	* SPDX-License-Identifier: GPL-2.0+
5d3207da WD	7	*/
	8
	9	/*
	10	* Configuration support for Xilinx Virtex2 devices. Based
	11	* on spartan2.c (Rich Ireland, [email protected]).
	12	*/
	13
	14	#include <common.h>
24b852a7	15	#include <console.h>
5d3207da WD	16	#include <virtex2.h>
5d3207da WD	17
9a9200b4 WD	18	#if 0
9a9200b4 WD	19	#define FPGA_DEBUG
265817c7	20	#endif
9a9200b4	21
5d3207da WD	22	#ifdef FPGA_DEBUG
	23	#define PRINTF(fmt,args...) printf (fmt ,##args)
	24	#else
	25	#define PRINTF(fmt,args...)
	26	#endif
	27
	28	/*
	29	* If the SelectMap interface can be overrun by the processor, define
6d0f6bcf	30	* CONFIG_SYS_FPGA_CHECK_BUSY and/or CONFIG_FPGA_DELAY in the board configuration
5d3207da WD	31	* file and add board-specific support for checking BUSY status. By default,
	32	* assume that the SelectMap interface cannot be overrun.
	33	*/
6d0f6bcf JCPV	34	#ifndef CONFIG_SYS_FPGA_CHECK_BUSY
6d0f6bcf JCPV	35	#undef CONFIG_SYS_FPGA_CHECK_BUSY
5d3207da WD	36	#endif
	37
	38	#ifndef CONFIG_FPGA_DELAY
	39	#define CONFIG_FPGA_DELAY()
	40	#endif
	41
6d0f6bcf JCPV	42	#ifndef CONFIG_SYS_FPGA_PROG_FEEDBACK
6d0f6bcf JCPV	43	#define CONFIG_SYS_FPGA_PROG_FEEDBACK
5d3207da WD	44	#endif
	45
	46	/*
	47	* Don't allow config cycle to be interrupted
	48	*/
6d0f6bcf JCPV	49	#ifndef CONFIG_SYS_FPGA_CHECK_CTRLC
6d0f6bcf JCPV	50	#undef CONFIG_SYS_FPGA_CHECK_CTRLC
5d3207da WD	51	#endif
	52
	53	/*
	54	* Check for errors during configuration by default
	55	*/
6d0f6bcf JCPV	56	#ifndef CONFIG_SYS_FPGA_CHECK_ERROR
6d0f6bcf JCPV	57	#define CONFIG_SYS_FPGA_CHECK_ERROR
5d3207da WD	58	#endif
	59
	60	/*
	61	* The default timeout in mS for INIT_B to deassert after PROG_B has
	62	* been deasserted. Per the latest Virtex II Handbook (page 347), the
	63	* max time from PORG_B deassertion to INIT_B deassertion is 4uS per
	64	* data frame for the XC2V8000. The XC2V8000 has 2860 data frames
	65	* which yields 11.44 mS. So let's make it bigger in order to handle
	66	* an XC2V1000, if anyone can ever get ahold of one.
	67	*/
6d0f6bcf JCPV	68	#ifndef CONFIG_SYS_FPGA_WAIT_INIT
6d0f6bcf JCPV	69	#define CONFIG_SYS_FPGA_WAIT_INIT CONFIG_SYS_HZ/2 /* 500 ms */
5d3207da WD	70	#endif
	71
	72	/*
	73	* The default timeout for waiting for BUSY to deassert during configuration.
	74	* This is normally not necessary since for most reasonable configuration
	75	* clock frequencies (i.e. 66 MHz or less), BUSY monitoring is unnecessary.
	76	*/
6d0f6bcf JCPV	77	#ifndef CONFIG_SYS_FPGA_WAIT_BUSY
6d0f6bcf JCPV	78	#define CONFIG_SYS_FPGA_WAIT_BUSY CONFIG_SYS_HZ/200 /* 5 ms*/
5d3207da WD	79	#endif
	80
	81	/* Default timeout for waiting for FPGA to enter operational mode after
	82	* configuration data has been written.
	83	*/
6d0f6bcf JCPV	84	#ifndef CONFIG_SYS_FPGA_WAIT_CONFIG
6d0f6bcf JCPV	85	#define CONFIG_SYS_FPGA_WAIT_CONFIG CONFIG_SYS_HZ/5 /* 200 ms */
5d3207da WD	86	#endif
5d3207da WD	87
f8c1be98 MS	88	static int virtex2_ssm_load(xilinx_desc desc, const void buf, size_t bsize);
f8c1be98 MS	89	static int virtex2_ssm_dump(xilinx_desc desc, const void buf, size_t bsize);
5d3207da	90
f8c1be98 MS	91	static int virtex2_ss_load(xilinx_desc desc, const void buf, size_t bsize);
f8c1be98 MS	92	static int virtex2_ss_dump(xilinx_desc desc, const void buf, size_t bsize);
5d3207da	93
7a78bd26 MS	94	static int virtex2_load(xilinx_desc desc, const void buf, size_t bsize,
7a78bd26 MS	95	bitstream_type bstype)
5d3207da WD	96	{
	97	int ret_val = FPGA_FAIL;
	98
	99	switch (desc->iface) {
	100	case slave_serial:
	101	PRINTF ("%s: Launching Slave Serial Load\n", __FUNCTION__);
d9071ce0	102	ret_val = virtex2_ss_load(desc, buf, bsize);
5d3207da WD	103	break;
	104
	105	case slave_selectmap:
	106	PRINTF ("%s: Launching Slave Parallel Load\n", __FUNCTION__);
d9071ce0	107	ret_val = virtex2_ssm_load(desc, buf, bsize);
5d3207da WD	108	break;
	109
	110	default:
	111	printf ("%s: Unsupported interface type, %d\n",
	112	__FUNCTION__, desc->iface);
	113	}
	114	return ret_val;
	115	}
	116
14cfc4f3	117	static int virtex2_dump(xilinx_desc desc, const void buf, size_t bsize)
5d3207da WD	118	{
	119	int ret_val = FPGA_FAIL;
	120
	121	switch (desc->iface) {
	122	case slave_serial:
	123	PRINTF ("%s: Launching Slave Serial Dump\n", __FUNCTION__);
d9071ce0	124	ret_val = virtex2_ss_dump(desc, buf, bsize);
5d3207da WD	125	break;
	126
	127	case slave_parallel:
	128	PRINTF ("%s: Launching Slave Parallel Dump\n", __FUNCTION__);
d9071ce0	129	ret_val = virtex2_ssm_dump(desc, buf, bsize);
5d3207da WD	130	break;
	131
	132	default:
	133	printf ("%s: Unsupported interface type, %d\n",
	134	__FUNCTION__, desc->iface);
	135	}
	136	return ret_val;
	137	}
	138
14cfc4f3	139	static int virtex2_info(xilinx_desc *desc)
5d3207da WD	140	{
	141	return FPGA_SUCCESS;
	142	}
	143
5d3207da WD	144	/*
	145	* Virtex-II Slave SelectMap configuration loader. Configuration via
	146	* SelectMap is as follows:
	147	* 1. Set the FPGA's PROG_B line low.
	148	* 2. Set the FPGA's PROG_B line high. Wait for INIT_B to go high.
	149	* 3. Write data to the SelectMap port. If INIT_B goes low at any time
	150	* this process, a configuration error (most likely CRC failure) has
	151	* ocurred. At this point a status word may be read from the
	152	* SelectMap interface to determine the source of the problem (You
9a9200b4	153	* could, for instance, put this in your 'abort' function handler).
5d3207da WD	154	* 4. After all data has been written, test the state of the FPGA
	155	* INIT_B and DONE lines. If both are high, configuration has
	156	* succeeded. Congratulations!
	157	*/
f8c1be98	158	static int virtex2_ssm_load(xilinx_desc desc, const void buf, size_t bsize)
5d3207da WD	159	{
5d3207da WD	160	int ret_val = FPGA_FAIL;
d9071ce0	161	xilinx_virtex2_slave_selectmap_fns *fn = desc->iface_fns;
5d3207da WD	162
	163	PRINTF ("%s:%d: Start with interface functions @ 0x%p\n",
	164	__FUNCTION__, __LINE__, fn);
	165
	166	if (fn) {
	167	size_t bytecount = 0;
	168	unsigned char data = (unsigned char ) buf;
	169	int cookie = desc->cookie;
	170	unsigned long ts;
	171
	172	/* Gotta split this one up (so the stack won't blow??) */
	173	PRINTF ("%s:%d: Function Table:\n"
	174	" base 0x%p\n"
	175	" struct 0x%p\n"
	176	" pre 0x%p\n"
	177	" prog 0x%p\n"
	178	" init 0x%p\n"
	179	" error 0x%p\n",
	180	__FUNCTION__, __LINE__,
	181	&fn, fn, fn->pre, fn->pgm, fn->init, fn->err);
	182	PRINTF (" clock 0x%p\n"
	183	" cs 0x%p\n"
	184	" write 0x%p\n"
	185	" rdata 0x%p\n"
	186	" wdata 0x%p\n"
	187	" busy 0x%p\n"
	188	" abort 0x%p\n"
	189	" post 0x%p\n\n",
	190	fn->clk, fn->cs, fn->wr, fn->rdata, fn->wdata,
	191	fn->busy, fn->abort, fn->post);
	192
6d0f6bcf	193	#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
5d3207da WD	194	printf ("Initializing FPGA Device %d...\n", cookie);
	195	#endif
	196	/*
	197	* Run the pre configuration function if there is one.
	198	*/
	199	if (*fn->pre) {
	200	(*fn->pre) (cookie);
	201	}
	202
	203	/*
	204	* Assert the program line. The minimum pulse width for
	205	* Virtex II devices is 300 nS (Tprogram parameter in datasheet).
	206	* There is no maximum value for the pulse width. Check to make
	207	* sure that INIT_B goes low after assertion of PROG_B
	208	*/
472d5460	209	(*fn->pgm) (true, true, cookie);
5d3207da WD	210	udelay (10);
	211	ts = get_timer (0);
	212	do {
6d0f6bcf	213	if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT_INIT) {
9a9200b4	214	printf ("%s:%d: ** Timeout after %d ticks waiting for INIT"
5d3207da	215	" to assert.\n", __FUNCTION__, __LINE__,
6d0f6bcf	216	CONFIG_SYS_FPGA_WAIT_INIT);
5d3207da WD	217	(*fn->abort) (cookie);
	218	return FPGA_FAIL;
	219	}
	220	} while (!(*fn->init) (cookie));
	221
472d5460	222	(*fn->pgm) (false, true, cookie);
5d3207da	223	CONFIG_FPGA_DELAY ();
472d5460	224	(*fn->clk) (true, true, cookie);
5d3207da WD	225
	226	/*
	227	* Start a timer and wait for INIT_B to go high
	228	*/
	229	ts = get_timer (0);
	230	do {
	231	CONFIG_FPGA_DELAY ();
6d0f6bcf	232	if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT_INIT) {
9a9200b4	233	printf ("%s:%d: ** Timeout after %d ticks waiting for INIT"
5d3207da	234	" to deassert.\n", __FUNCTION__, __LINE__,
6d0f6bcf	235	CONFIG_SYS_FPGA_WAIT_INIT);
5d3207da WD	236	(*fn->abort) (cookie);
	237	return FPGA_FAIL;
	238	}
	239	} while ((fn->init) (cookie) && (fn->busy) (cookie));
	240
472d5460 YS	241	(*fn->wr) (true, true, cookie);
472d5460 YS	242	(*fn->cs) (true, true, cookie);
5d3207da WD	243
	244	udelay (10000);
	245
	246	/*
	247	* Load the data byte by byte
	248	*/
	249	while (bytecount < bsize) {
6d0f6bcf	250	#ifdef CONFIG_SYS_FPGA_CHECK_CTRLC
5d3207da WD	251	if (ctrlc ()) {
	252	(*fn->abort) (cookie);
	253	return FPGA_FAIL;
	254	}
	255	#endif
9a9200b4 WD	256
	257	if ((*fn->done) (cookie) == FPGA_SUCCESS) {
	258	PRINTF ("%s:%d:done went active early, bytecount = %d\n",
	259	__FUNCTION__, __LINE__, bytecount);
	260	break;
	261	}
	262
6d0f6bcf	263	#ifdef CONFIG_SYS_FPGA_CHECK_ERROR
5d3207da	264	if ((*fn->init) (cookie)) {
9a9200b4	265	printf ("\n%s:%d: ** Error: INIT asserted during"
5d3207da	266	" configuration\n", __FUNCTION__, __LINE__);
9a9200b4 WD	267	printf ("%d = buffer offset, %d = buffer size\n",
9a9200b4 WD	268	bytecount, bsize);
5d3207da WD	269	(*fn->abort) (cookie);
	270	return FPGA_FAIL;
	271	}
	272	#endif
9a9200b4	273
472d5460	274	(*fn->wdata) (data[bytecount++], true, cookie);
5d3207da WD	275	CONFIG_FPGA_DELAY ();
	276
	277	/*
	278	* Cycle the clock pin
	279	*/
472d5460	280	(*fn->clk) (false, true, cookie);
5d3207da	281	CONFIG_FPGA_DELAY ();
472d5460	282	(*fn->clk) (true, true, cookie);
5d3207da	283
6d0f6bcf	284	#ifdef CONFIG_SYS_FPGA_CHECK_BUSY
5d3207da WD	285	ts = get_timer (0);
5d3207da WD	286	while ((*fn->busy) (cookie)) {
6d0f6bcf	287	if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT_BUSY) {
9a9200b4	288	printf ("%s:%d: ** Timeout after %d ticks waiting for"
5d3207da	289	" BUSY to deassert\n",
6d0f6bcf	290	__FUNCTION__, __LINE__, CONFIG_SYS_FPGA_WAIT_BUSY);
5d3207da WD	291	(*fn->abort) (cookie);
	292	return FPGA_FAIL;
	293	}
	294	}
	295	#endif
	296
6d0f6bcf	297	#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
5d3207da WD	298	if (bytecount % (bsize / 40) == 0)
	299	putc ('.');
	300	#endif
	301	}
	302
	303	/*
	304	* Finished writing the data; deassert FPGA CS_B and WRITE_B signals.
	305	*/
	306	CONFIG_FPGA_DELAY ();
472d5460 YS	307	(*fn->cs) (false, true, cookie);
472d5460 YS	308	(*fn->wr) (false, true, cookie);
5d3207da	309
6d0f6bcf	310	#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
5d3207da WD	311	putc ('\n');
	312	#endif
	313
	314	/*
	315	* Check for successful configuration. FPGA INIT_B and DONE should
	316	* both be high upon successful configuration.
	317	*/
	318	ts = get_timer (0);
	319	ret_val = FPGA_SUCCESS;
	320	while (((fn->done) (cookie) == FPGA_FAIL) \|\| (fn->init) (cookie)) {
6d0f6bcf	321	if (get_timer (ts) > CONFIG_SYS_FPGA_WAIT_CONFIG) {
9a9200b4	322	printf ("%s:%d: ** Timeout after %d ticks waiting for DONE to"
5d3207da	323	"assert and INIT to deassert\n",
6d0f6bcf	324	__FUNCTION__, __LINE__, CONFIG_SYS_FPGA_WAIT_CONFIG);
5d3207da WD	325	(*fn->abort) (cookie);
	326	ret_val = FPGA_FAIL;
	327	break;
	328	}
	329	}
	330
	331	if (ret_val == FPGA_SUCCESS) {
6d0f6bcf	332	#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
5d3207da WD	333	printf ("Initialization of FPGA device %d complete\n", cookie);
	334	#endif
	335	/*
	336	* Run the post configuration function if there is one.
	337	*/
	338	if (*fn->post) {
	339	(*fn->post) (cookie);
	340	}
	341	} else {
6d0f6bcf	342	#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
5d3207da WD	343	printf ("** Initialization of FPGA device %d FAILED\n",
	344	cookie);
	345	#endif
	346	}
	347	} else {
	348	printf ("%s:%d: NULL Interface function table!\n",
	349	__FUNCTION__, __LINE__);
	350	}
	351	return ret_val;
	352	}
	353
	354	/*
	355	* Read the FPGA configuration data
	356	*/
f8c1be98	357	static int virtex2_ssm_dump(xilinx_desc desc, const void buf, size_t bsize)
5d3207da WD	358	{
5d3207da WD	359	int ret_val = FPGA_FAIL;
d9071ce0	360	xilinx_virtex2_slave_selectmap_fns *fn = desc->iface_fns;
5d3207da WD	361
	362	if (fn) {
	363	unsigned char data = (unsigned char ) buf;
	364	size_t bytecount = 0;
	365	int cookie = desc->cookie;
	366
	367	printf ("Starting Dump of FPGA Device %d...\n", cookie);
	368
472d5460 YS	369	(*fn->cs) (true, true, cookie);
472d5460 YS	370	(*fn->clk) (true, true, cookie);
5d3207da WD	371
5d3207da WD	372	while (bytecount < bsize) {
6d0f6bcf	373	#ifdef CONFIG_SYS_FPGA_CHECK_CTRLC
5d3207da WD	374	if (ctrlc ()) {
	375	(*fn->abort) (cookie);
	376	return FPGA_FAIL;
	377	}
	378	#endif
	379	/*
	380	* Cycle the clock and read the data
	381	*/
472d5460 YS	382	(*fn->clk) (false, true, cookie);
472d5460 YS	383	(*fn->clk) (true, true, cookie);
5d3207da	384	(*fn->rdata) (&(data[bytecount++]), cookie);
6d0f6bcf	385	#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
5d3207da WD	386	if (bytecount % (bsize / 40) == 0)
	387	putc ('.');
	388	#endif
	389	}
	390
	391	/*
	392	* Deassert CS_B and cycle the clock to deselect the device.
	393	*/
472d5460 YS	394	(*fn->cs) (false, false, cookie);
	395	(*fn->clk) (false, true, cookie);
	396	(*fn->clk) (true, true, cookie);
5d3207da	397
6d0f6bcf	398	#ifdef CONFIG_SYS_FPGA_PROG_FEEDBACK
5d3207da WD	399	putc ('\n');
	400	#endif
	401	puts ("Done.\n");
	402	} else {
	403	printf ("%s:%d: NULL Interface function table!\n",
	404	__FUNCTION__, __LINE__);
	405	}
	406	return ret_val;
	407	}
	408
f8c1be98	409	static int virtex2_ss_load(xilinx_desc desc, const void buf, size_t bsize)
5d3207da WD	410	{
	411	printf ("%s: Slave Serial Loading is unsupported\n", __FUNCTION__);
	412	return FPGA_FAIL;
	413	}
	414
f8c1be98	415	static int virtex2_ss_dump(xilinx_desc desc, const void buf, size_t bsize)
5d3207da WD	416	{
	417	printf ("%s: Slave Serial Dumping is unsupported\n", __FUNCTION__);
	418	return FPGA_FAIL;
	419	}
	420
5d3207da	421	/* vim: set ts=4 tw=78: */
14cfc4f3 MS	422
	423	struct xilinx_fpga_op virtex2_op = {
	424	.load = virtex2_load,
	425	.dump = virtex2_dump,
	426	.info = virtex2_info,
	427	};