1 // SPDX-License-Identifier: GPL-2.0
5  * Manage Lattice FPGA firmware that is loaded over SPI using
12 #include <linux/fpga/fpga-mgr.h>
18 /* MachXO2 Programming Guide - sysCONFIG Programming Commands */
30  * Sheet' sysCONFIG Port Timing Specifications (3-36)
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()
135 static int machxo2_cleanup(struct fpga_manager *mgr)  in machxo2_cleanup()  argument
137 	struct spi_device *spi = mgr->priv;  in machxo2_cleanup()
169 	dev_err(&mgr->dev, "Cleanup failed\n");  in machxo2_cleanup()
174 static enum fpga_mgr_states machxo2_spi_state(struct fpga_manager *mgr)  in machxo2_spi_state()  argument
176 	struct spi_device *spi = mgr->priv;  in machxo2_spi_state()
187 static int machxo2_write_init(struct fpga_manager *mgr,  in machxo2_write_init()  argument
191 	struct spi_device *spi = mgr->priv;  in machxo2_write_init()
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()
229 		ret = -EINVAL;  in machxo2_write_init()
247 	dev_err(&mgr->dev, "Error during FPGA init.\n");  in machxo2_write_init()
252 static int machxo2_write(struct fpga_manager *mgr, const char *buf,  in machxo2_write()  argument
255 	struct spi_device *spi = mgr->priv;  in machxo2_write()
264 		dev_err(&mgr->dev, "Malformed payload.\n");  in machxo2_write()
265 		return -EINVAL;  in machxo2_write()
281 			dev_err(&mgr->dev, "Error loading the bitstream.\n");  in machxo2_write()
291 static int machxo2_write_complete(struct fpga_manager *mgr,  in machxo2_write_complete()  argument
294 	struct spi_device *spi = mgr->priv;  in machxo2_write_complete()
317 		machxo2_cleanup(mgr);  in machxo2_write_complete()
318 		ret = -EINVAL;  in machxo2_write_complete()
340 			machxo2_cleanup(mgr);  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()
366 	struct fpga_manager *mgr;  in machxo2_spi_probe()  local
368 	if (spi->max_speed_hz > MACHXO2_MAX_SPEED) {  in machxo2_spi_probe()
370 		return -EINVAL;  in machxo2_spi_probe()
373 	mgr = devm_fpga_mgr_register(dev, "Lattice MachXO2 SPI FPGA Manager",  in machxo2_spi_probe()
375 	return PTR_ERR_OR_ZERO(mgr);  in machxo2_spi_probe()
380 	{ .compatible = "lattice,machxo2-slave-spi", },
387 	{ "machxo2-slave-spi", 0 },
394 		.name = "machxo2-slave-spi",
404 MODULE_DESCRIPTION("Load Lattice FPGA firmware over SPI");