1 // SPDX-License-Identifier: GPL-2.0
12 #include <linux/fpga/fpga-mgr.h>
18 /* MachXO2 Programming Guide - sysCONFIG Programming Commands */
30  * Sheet' sysCONFIG Port Timing Specifications (3-36)
43 /* Status register bits, errors and error mask */
61 static inline u8 get_err(unsigned long *status)  in get_err()  argument
63 	return (*status >> ERRBITS) & ERRMASK;  in get_err()
66 static int get_status(struct spi_device *spi, unsigned long *status)  in get_status()  argument
69 	struct spi_transfer rx, tx;  in get_status()  local
73 	memset(&rx, 0, sizeof(rx));  in get_status()
76 	tx.len = sizeof(cmd);  in get_status()
77 	rx.rx_buf = status;  in get_status()
78 	rx.len = 4;  in get_status()
81 	spi_message_add_tail(&rx, &msg);  in get_status()
86 	*status = be32_to_cpu(*status);  in get_status()
109 static void dump_status_reg(unsigned long *status)  in dump_status_reg()  argument
112 	pr_debug("machxo2 status: 0x%08lX - done=%d, cfgena=%d, busy=%d, fail=%d, devver=%d, err=%s\n",  in dump_status_reg()
113 		 *status, test_bit(DONE, status), test_bit(ENAB, status),  in dump_status_reg()
114 		 test_bit(BUSY, status), test_bit(FAIL, status),  in dump_status_reg()
115 		 test_bit(DVER, status), get_err_string(get_err(status)));  in dump_status_reg()
121 	unsigned long status;  in wait_until_not_busy()  local
125 		ret = get_status(spi, &status);  in wait_until_not_busy()
129 			return -EBUSY;  in wait_until_not_busy()
130 	} while (test_bit(BUSY, &status));  in wait_until_not_busy()
137 	struct spi_device *spi = mgr->priv;  in machxo2_cleanup()
147 	tx[0].len = sizeof(erase);  in machxo2_cleanup()
159 	tx[1].len = sizeof(refresh);  in machxo2_cleanup()
169 	dev_err(&mgr->dev, "Cleanup failed\n");  in machxo2_cleanup()
176 	struct spi_device *spi = mgr->priv;  in machxo2_spi_state()
177 	unsigned long status;  in machxo2_spi_state()  local
179 	get_status(spi, &status);  in machxo2_spi_state()
180 	if (!test_bit(BUSY, &status) && test_bit(DONE, &status) &&  in machxo2_spi_state()
181 	    get_err(&status) == ENOERR)  in machxo2_spi_state()
191 	struct spi_device *spi = mgr->priv;  in machxo2_write_init()
197 	unsigned long status;  in machxo2_write_init()  local
200 	if ((info->flags & FPGA_MGR_PARTIAL_RECONFIG)) {  in machxo2_write_init()
201 		dev_err(&mgr->dev,  in machxo2_write_init()
203 		return -ENOTSUPP;  in machxo2_write_init()
206 	get_status(spi, &status);  in machxo2_write_init()
207 	dump_status_reg(&status);  in machxo2_write_init()
211 	tx[0].len = sizeof(enable);  in machxo2_write_init()
217 	tx[1].len = sizeof(erase);  in machxo2_write_init()
227 	get_status(spi, &status);  in machxo2_write_init()
228 	if (test_bit(FAIL, &status)) {  in machxo2_write_init()
229 		ret = -EINVAL;  in machxo2_write_init()
232 	dump_status_reg(&status);  in machxo2_write_init()
236 	tx[2].len = sizeof(initaddr);  in machxo2_write_init()
242 	get_status(spi, &status);  in machxo2_write_init()
243 	dump_status_reg(&status);  in machxo2_write_init()
247 	dev_err(&mgr->dev, "Error during FPGA init.\n");  in machxo2_write_init()
255 	struct spi_device *spi = mgr->priv;  in machxo2_write()
260 	unsigned long status;  in machxo2_write()  local
264 		dev_err(&mgr->dev, "Malformed payload.\n");  in machxo2_write()
265 		return -EINVAL;  in machxo2_write()
267 	get_status(spi, &status);  in machxo2_write()
268 	dump_status_reg(&status);  in machxo2_write()
275 		tx.len = MACHXO2_BUF_SIZE;  in machxo2_write()
281 			dev_err(&mgr->dev, "Error loading the bitstream.\n");  in machxo2_write()
285 	get_status(spi, &status);  in machxo2_write()
286 	dump_status_reg(&status);  in machxo2_write()
294 	struct spi_device *spi = mgr->priv;  in machxo2_write_complete()
299 	unsigned long status;  in machxo2_write_complete()  local
305 	tx[0].len = sizeof(progdone);  in machxo2_write_complete()
314 	get_status(spi, &status);  in machxo2_write_complete()
315 	dump_status_reg(&status);  in machxo2_write_complete()
316 	if (!test_bit(DONE, &status)) {  in machxo2_write_complete()
318 		ret = -EINVAL;  in machxo2_write_complete()
325 		tx[1].len = sizeof(refresh);  in machxo2_write_complete()
333 		/* check refresh status */  in machxo2_write_complete()
334 		get_status(spi, &status);  in machxo2_write_complete()
335 		dump_status_reg(&status);  in machxo2_write_complete()
336 		if (!test_bit(BUSY, &status) && test_bit(DONE, &status) &&  in machxo2_write_complete()
337 		    get_err(&status) == ENOERR)  in machxo2_write_complete()
341 			ret = -EINVAL;  in machxo2_write_complete()
346 	get_status(spi, &status);  in machxo2_write_complete()
347 	dump_status_reg(&status);  in machxo2_write_complete()
351 	dev_err(&mgr->dev, "Refresh failed.\n");  in machxo2_write_complete()
365 	struct device *dev = &spi->dev;  in machxo2_spi_probe()
368 	if (spi->max_speed_hz > MACHXO2_MAX_SPEED) {  in machxo2_spi_probe()
370 		return -EINVAL;  in machxo2_spi_probe()
380 	{ .compatible = "lattice,machxo2-slave-spi", },
387 	{ "machxo2-slave-spi", 0 },
394 		.name = "machxo2-slave-spi",