1 // SPDX-License-Identifier: GPL-2.0-only
3  * datasheet: https://www.nxp.com/docs/en/data-sheet/K20P144M120SF3.pdf
5  * Copyright (C) 2018-2021 Collabora
6  * Copyright (C) 2018-2021 GE Healthcare
15 #include <linux/spi/spi.h>
42 #define EZPORT_SECTOR_MASK	(EZPORT_SECTOR_SIZE - 1)
59 static int ezport_start_programming(struct spi_device *spi, struct gpio_desc *reset)  in ezport_start_programming()  argument
68 	spi_bus_lock(spi->controller);  in ezport_start_programming()
73 	ret = spi_sync_locked(spi, &msg);  in ezport_start_programming()
85 	ret = spi_sync_locked(spi, &msg);  in ezport_start_programming()
88 	spi_bus_unlock(spi->controller);  in ezport_start_programming()
92 static void ezport_stop_programming(struct spi_device *spi, struct gpio_desc *reset)  in ezport_stop_programming()  argument
95 	spi_bus_lock(spi->controller);  in ezport_stop_programming()
97 	spi_bus_unlock(spi->controller);  in ezport_stop_programming()
100 static int ezport_get_status_register(struct spi_device *spi)  in ezport_get_status_register()  argument
104 	ret = spi_w8r8(spi, EZPORT_CMD_RDSR);  in ezport_get_status_register()
108 		dev_err(&spi->dev, "Invalid EzPort status, EzPort is not functional!\n");  in ezport_get_status_register()
109 		return -EINVAL;  in ezport_get_status_register()
115 static int ezport_soft_reset(struct spi_device *spi)  in ezport_soft_reset()  argument
120 	ret = spi_write(spi, &cmd, 1);  in ezport_soft_reset()
129 static int ezport_send_simple(struct spi_device *spi, u8 cmd)  in ezport_send_simple()  argument
133 	ret = spi_write(spi, &cmd, 1);  in ezport_send_simple()
137 	return ezport_get_status_register(spi);  in ezport_send_simple()
140 static int ezport_wait_write(struct spi_device *spi, u32 retries)  in ezport_wait_write()  argument
146 		ret = ezport_get_status_register(spi);  in ezport_wait_write()
155 static int ezport_write_enable(struct spi_device *spi)  in ezport_write_enable()  argument
160 		ret = ezport_send_simple(spi, EZPORT_CMD_WREN);  in ezport_write_enable()
166 		dev_err(&spi->dev, "EzPort write enable timed out\n");  in ezport_write_enable()
167 		return -ETIMEDOUT;  in ezport_write_enable()
172 static int ezport_bulk_erase(struct spi_device *spi)  in ezport_bulk_erase()  argument
177 	dev_dbg(&spi->dev, "EzPort bulk erase...\n");  in ezport_bulk_erase()
179 	ret = ezport_write_enable(spi);  in ezport_bulk_erase()
183 	ret = spi_write(spi, &cmd, 1);  in ezport_bulk_erase()
187 	ret = ezport_wait_write(spi, 1000);  in ezport_bulk_erase()
194 static int ezport_section_erase(struct spi_device *spi, u32 address)  in ezport_section_erase()  argument
199 	dev_dbg(&spi->dev, "Ezport section erase @ 0x%06x...\n", address);  in ezport_section_erase()
202 		return -EINVAL;  in ezport_section_erase()
204 	ret = ezport_write_enable(spi);  in ezport_section_erase()
208 	ret = spi_write(spi, query, sizeof(query));  in ezport_section_erase()
212 	return ezport_wait_write(spi, 200);  in ezport_section_erase()
215 static int ezport_flash_transfer(struct spi_device *spi, u32 address,  in ezport_flash_transfer()  argument
222 	dev_dbg(&spi->dev, "EzPort write %zu bytes @ 0x%06x...\n", payload_size, address);  in ezport_flash_transfer()
224 	ret = ezport_write_enable(spi);  in ezport_flash_transfer()
230 		return -ENOMEM;  in ezport_flash_transfer()
243 	ret = spi_sync_transfer(spi, xfers, 2);  in ezport_flash_transfer()
248 	return ezport_wait_write(spi, 40);  in ezport_flash_transfer()
251 static int ezport_flash_compare(struct spi_device *spi, u32 address,  in ezport_flash_compare()  argument
260 		return -ENOMEM;  in ezport_flash_compare()
275 	ret = spi_sync_transfer(spi, xfers, 2);  in ezport_flash_compare()
282 		ret = -EBADMSG;  in ezport_flash_compare()
283 		dev_dbg(&spi->dev, "Verification failure @ %06x", address);  in ezport_flash_compare()
293 static int ezport_firmware_compare_data(struct spi_device *spi,  in ezport_firmware_compare_data()  argument
300 	dev_dbg(&spi->dev, "EzPort compare data with %zu bytes...\n", size);  in ezport_firmware_compare_data()
302 	ret = ezport_get_status_register(spi);  in ezport_firmware_compare_data()
307 		dev_info(&spi->dev, "Device is in secure mode (status=0x%02x)!\n", ret);  in ezport_firmware_compare_data()
308 		dev_info(&spi->dev, "FW verification is not possible\n");  in ezport_firmware_compare_data()
309 		return -EACCES;  in ezport_firmware_compare_data()
312 	while (size - address > 0) {  in ezport_firmware_compare_data()
313 		transfer_size = min((size_t) EZPORT_TRANSFER_SIZE, size - address);  in ezport_firmware_compare_data()
315 		ret = ezport_flash_compare(spi, address, data+address, transfer_size);  in ezport_firmware_compare_data()
325 static int ezport_firmware_flash_data(struct spi_device *spi,  in ezport_firmware_flash_data()  argument
332 	dev_dbg(&spi->dev, "EzPort flash data with %zu bytes...\n", size);  in ezport_firmware_flash_data()
334 	ret = ezport_get_status_register(spi);  in ezport_firmware_flash_data()
339 		ret = ezport_bulk_erase(spi);  in ezport_firmware_flash_data()
343 			return -EINVAL;  in ezport_firmware_flash_data()
346 	while (size - address > 0) {  in ezport_firmware_flash_data()
348 			ret = ezport_section_erase(spi, address);  in ezport_firmware_flash_data()
352 				return -EIO;  in ezport_firmware_flash_data()
355 		transfer_size = min((size_t) EZPORT_TRANSFER_SIZE, size - address);  in ezport_firmware_flash_data()
357 		ret = ezport_flash_transfer(spi, address,  in ezport_firmware_flash_data()
362 			return -ETIMEDOUT;  in ezport_firmware_flash_data()
364 			return -EIO;  in ezport_firmware_flash_data()
369 	dev_dbg(&spi->dev, "EzPort verify flashed data...\n");  in ezport_firmware_flash_data()
370 	ret = ezport_firmware_compare_data(spi, data, size);  in ezport_firmware_flash_data()
373 	if (ret == -EACCES)  in ezport_firmware_flash_data()
377 		dev_err(&spi->dev, "Failed to verify flashed data: %d\n", ret);  in ezport_firmware_flash_data()
379 	ret = ezport_soft_reset(spi);  in ezport_firmware_flash_data()
381 		dev_warn(&spi->dev, "EzPort reset failed!\n");  in ezport_firmware_flash_data()
386 static int ezport_firmware_load(struct spi_device *spi, const char *fwname)  in ezport_firmware_load()  argument
391 	ret = request_firmware(&fw, fwname, &spi->dev);  in ezport_firmware_load()
393 		dev_err(&spi->dev, "Could not get firmware: %d\n", ret);  in ezport_firmware_load()
397 	ret = ezport_firmware_flash_data(spi, fw->data, fw->size);  in ezport_firmware_load()
405  * ezport_flash - flash device firmware
406  * @spi: SPI device for NXP EzPort interface
414 static int ezport_flash(struct spi_device *spi, struct gpio_desc *reset, const char *fwname)  in ezport_flash()  argument
418 	ret = ezport_start_programming(spi, reset);  in ezport_flash()
422 	ret = ezport_firmware_load(spi, fwname);  in ezport_flash()
424 	ezport_stop_programming(spi, reset);  in ezport_flash()
427 		dev_err(&spi->dev, "Failed to flash firmware: %d\n", ret);  in ezport_flash()
429 		dev_dbg(&spi->dev, "Finished FW flashing!\n");  in ezport_flash()
443 		return -EINVAL;  in update_firmware_store()
445 	mutex_lock(&achc->device_lock);  in update_firmware_store()
446 	ret = ezport_flash(achc->ezport, achc->reset, "achc.bin");  in update_firmware_store()
447 	mutex_unlock(&achc->device_lock);  in update_firmware_store()
461 	mutex_lock(&achc->device_lock);  in reset_show()
462 	ret = gpiod_get_value(achc->reset);  in reset_show()
463 	mutex_unlock(&achc->device_lock);  in reset_show()
480 		return -EINVAL;  in reset_store()
482 	mutex_lock(&achc->device_lock);  in reset_store()
483 	gpiod_set_value(achc->reset, value);  in reset_store()
484 	mutex_unlock(&achc->device_lock);  in reset_store()
504 static int gehc_achc_probe(struct spi_device *spi)  in gehc_achc_probe()  argument
509 	spi->max_speed_hz = ACHC_MAX_FREQ_HZ;  in gehc_achc_probe()
510 	spi->bits_per_word = 8;  in gehc_achc_probe()
511 	spi->mode = SPI_MODE_0;  in gehc_achc_probe()
513 	achc = devm_kzalloc(&spi->dev, sizeof(*achc), GFP_KERNEL);  in gehc_achc_probe()
515 		return -ENOMEM;  in gehc_achc_probe()
516 	spi_set_drvdata(spi, achc);  in gehc_achc_probe()
517 	achc->main = spi;  in gehc_achc_probe()
519 	mutex_init(&achc->device_lock);  in gehc_achc_probe()
521 	ret = of_property_read_u32_index(spi->dev.of_node, "reg", 1, &ezport_reg);  in gehc_achc_probe()
523 		return dev_err_probe(&spi->dev, ret, "missing second reg entry!\n");  in gehc_achc_probe()
525 	achc->ezport = spi_new_ancillary_device(spi, ezport_reg);  in gehc_achc_probe()
526 	if (IS_ERR(achc->ezport))  in gehc_achc_probe()
527 		return PTR_ERR(achc->ezport);  in gehc_achc_probe()
529 	ret = devm_add_action_or_reset(&spi->dev, unregister_ezport, achc->ezport);  in gehc_achc_probe()
533 	achc->reset = devm_gpiod_get(&spi->dev, "reset", GPIOD_OUT_LOW);  in gehc_achc_probe()
534 	if (IS_ERR(achc->reset))  in gehc_achc_probe()
535 		return dev_err_probe(&spi->dev, PTR_ERR(achc->reset), "Could not get reset gpio\n");  in gehc_achc_probe()
545 MODULE_DEVICE_TABLE(spi, gehc_achc_id);
555 		.name	= "gehc-achc",