1 // SPDX-License-Identifier: GPL-2.0
11 #include <linux/delay.h>
12 #include <linux/fpga/fpga-mgr.h>
18 /* MachXO2 Programming Guide - sysCONFIG Programming Commands */
30  * Sheet' sysCONFIG Port Timing Specifications (3-36)
69 	struct spi_transfer rx, tx;  in get_status()  local
74 	memset(&tx, 0, sizeof(tx));  in get_status()
75 	tx.tx_buf = cmd;  in get_status()
76 	tx.len = sizeof(cmd);  in get_status()
80 	spi_message_add_tail(&tx, &msg);  in get_status()
112 	pr_debug("machxo2 status: 0x%08lX - done=%d, cfgena=%d, busy=%d, fail=%d, devver=%d, err=%s\n",  in dump_status_reg()
129 			return -EBUSY;  in wait_until_not_busy()
137 	struct spi_device *spi = mgr->priv;  in machxo2_cleanup()
139 	struct spi_transfer tx[2];  in machxo2_cleanup()  local
144 	memset(tx, 0, sizeof(tx));  in machxo2_cleanup()
146 	tx[0].tx_buf = &erase;  in machxo2_cleanup()
147 	tx[0].len = sizeof(erase);  in machxo2_cleanup()
148 	spi_message_add_tail(&tx[0], &msg);  in machxo2_cleanup()
158 	tx[1].tx_buf = &refresh;  in machxo2_cleanup()
159 	tx[1].len = sizeof(refresh);  in machxo2_cleanup()
160 	tx[1].delay.value = MACHXO2_REFRESH_USEC;  in machxo2_cleanup()
161 	tx[1].delay.unit = SPI_DELAY_UNIT_USECS;  in machxo2_cleanup()
162 	spi_message_add_tail(&tx[1], &msg);  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()
191 	struct spi_device *spi = mgr->priv;  in machxo2_write_init()
193 	struct spi_transfer tx[3];  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()
208 	memset(tx, 0, sizeof(tx));  in machxo2_write_init()
210 	tx[0].tx_buf = &enable;  in machxo2_write_init()
211 	tx[0].len = sizeof(enable);  in machxo2_write_init()
212 	tx[0].delay.value = MACHXO2_LOW_DELAY_USEC;  in machxo2_write_init()
213 	tx[0].delay.unit = SPI_DELAY_UNIT_USECS;  in machxo2_write_init()
214 	spi_message_add_tail(&tx[0], &msg);  in machxo2_write_init()
216 	tx[1].tx_buf = &erase;  in machxo2_write_init()
217 	tx[1].len = sizeof(erase);  in machxo2_write_init()
218 	spi_message_add_tail(&tx[1], &msg);  in machxo2_write_init()
229 		ret = -EINVAL;  in machxo2_write_init()
235 	tx[2].tx_buf = &initaddr;  in machxo2_write_init()
236 	tx[2].len = sizeof(initaddr);  in machxo2_write_init()
237 	spi_message_add_tail(&tx[2], &msg);  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()
257 	struct spi_transfer tx;  in machxo2_write()  local
264 		dev_err(&mgr->dev, "Malformed payload.\n");  in machxo2_write()
265 		return -EINVAL;  in machxo2_write()
272 		memset(&tx, 0, sizeof(tx));  in machxo2_write()
274 		tx.tx_buf = payload;  in machxo2_write()
275 		tx.len = MACHXO2_BUF_SIZE;  in machxo2_write()
276 		tx.delay.value = MACHXO2_HIGH_DELAY_USEC;  in machxo2_write()
277 		tx.delay.unit = SPI_DELAY_UNIT_USECS;  in machxo2_write()
278 		spi_message_add_tail(&tx, &msg);  in machxo2_write()
281 			dev_err(&mgr->dev, "Error loading the bitstream.\n");  in machxo2_write()
294 	struct spi_device *spi = mgr->priv;  in machxo2_write_complete()
296 	struct spi_transfer tx[2];  in machxo2_write_complete()  local
302 	memset(tx, 0, sizeof(tx));  in machxo2_write_complete()
304 	tx[0].tx_buf = &progdone;  in machxo2_write_complete()
305 	tx[0].len = sizeof(progdone);  in machxo2_write_complete()
306 	spi_message_add_tail(&tx[0], &msg);  in machxo2_write_complete()
318 		ret = -EINVAL;  in machxo2_write_complete()
324 		tx[1].tx_buf = &refresh;  in machxo2_write_complete()
325 		tx[1].len = sizeof(refresh);  in machxo2_write_complete()
326 		tx[1].delay.value = MACHXO2_REFRESH_USEC;  in machxo2_write_complete()
327 		tx[1].delay.unit = SPI_DELAY_UNIT_USECS;  in machxo2_write_complete()
328 		spi_message_add_tail(&tx[1], &msg);  in machxo2_write_complete()
341 			ret = -EINVAL;  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",