1 // SPDX-License-Identifier: GPL-2.0
3  * Emagic EMI 2|6 usb audio interface firmware loader.
13 #include <linux/firmware.h>
16 /* include firmware (variables)*/
28 #define EMI62_VENDOR_ID 		0x086a  /* Emagic Soft-und Hardware GmBH */
29 #define EMI62_PRODUCT_ID		0x0110	/* EMI 6|2m without firmware */
32 #define ANCHOR_LOAD_EXTERNAL	0xA3	/* This command is not implemented in the core. Requires firmware…
33 #define ANCHOR_LOAD_FPGA	0xA5	/* This command is not implemented in the core. Requires firmware. Em…
35 #define CPUCS_REG		0x7F92  /* EZ-USB Control and Status Register.  Bit 0 controls 8051 reset */ 
55 		dev_err(&dev->dev, "kmalloc(%d) failed.\n", length);  in emi62_writememory()
56 		return -ENOMEM;  in emi62_writememory()
69 	dev_info(&dev->dev, "%s - %d\n", __func__, reset_bit);  in emi62_set_reset()
73 		dev_err(&dev->dev, "set_reset (%d) failed\n", reset_bit);  in emi62_set_reset()
81 	const struct firmware *loader_fw = NULL;  in emi62_load_firmware()
82 	const struct firmware *bitstream_fw = NULL;  in emi62_load_firmware()
83 	const struct firmware *firmware_fw = NULL;  in emi62_load_firmware()
85 	int err = -ENOMEM;  in emi62_load_firmware()
90 	dev_dbg(&dev->dev, "load_firmware\n");  in emi62_load_firmware()
95 	err = request_ihex_firmware(&loader_fw, "emi62/loader.fw", &dev->dev);  in emi62_load_firmware()
100 				    &dev->dev);  in emi62_load_firmware()
104 	err = request_ihex_firmware(&firmware_fw, FIRMWARE_FW, &dev->dev);  in emi62_load_firmware()
110 	/* Assert reset (stop the CPU in the EMI) */  in emi62_load_firmware()
115 	rec = (const struct ihex_binrec *)loader_fw->data;  in emi62_load_firmware()
117 	/* 1. We need to put the loader for the FPGA into the EZ-USB */  in emi62_load_firmware()
119 		err = emi62_writememory(dev, be32_to_cpu(rec->addr),  in emi62_load_firmware()
120 					rec->data, be16_to_cpu(rec->len),  in emi62_load_firmware()
127 	/* De-assert reset (let the CPU run) */  in emi62_load_firmware()
133 	/* 2. We upload the FPGA firmware into the EMI  in emi62_load_firmware()
136 	rec = (const struct ihex_binrec *)bitstream_fw->data;  in emi62_load_firmware()
139 		addr = be32_to_cpu(rec->addr);  in emi62_load_firmware()
142 		while (rec && (i + be16_to_cpu(rec->len) < FW_LOAD_SIZE)) {  in emi62_load_firmware()
143 			memcpy(buf + i, rec->data, be16_to_cpu(rec->len));  in emi62_load_firmware()
144 			i += be16_to_cpu(rec->len);  in emi62_load_firmware()
152 	/* Assert reset (stop the CPU in the EMI) */  in emi62_load_firmware()
157 	/* 3. We need to put the loader for the firmware into the EZ-USB (again...) */  in emi62_load_firmware()
158 	for (rec = (const struct ihex_binrec *)loader_fw->data;  in emi62_load_firmware()
160 		err = emi62_writememory(dev, be32_to_cpu(rec->addr),  in emi62_load_firmware()
161 					rec->data, be16_to_cpu(rec->len),  in emi62_load_firmware()
167 	/* De-assert reset (let the CPU run) */  in emi62_load_firmware()
173 	/* 4. We put the part of the firmware that lies in the external RAM into the EZ-USB */  in emi62_load_firmware()
175 	for (rec = (const struct ihex_binrec *)firmware_fw->data;  in emi62_load_firmware()
177 		if (!INTERNAL_RAM(be32_to_cpu(rec->addr))) {  in emi62_load_firmware()
178 			err = emi62_writememory(dev, be32_to_cpu(rec->addr),  in emi62_load_firmware()
179 						rec->data, be16_to_cpu(rec->len),  in emi62_load_firmware()
186 	/* Assert reset (stop the CPU in the EMI) */  in emi62_load_firmware()
191 	for (rec = (const struct ihex_binrec *)firmware_fw->data;  in emi62_load_firmware()
193 		if (INTERNAL_RAM(be32_to_cpu(rec->addr))) {  in emi62_load_firmware()
194 			err = emi62_writememory(dev, be32_to_cpu(rec->addr),  in emi62_load_firmware()
195 						rec->data, be16_to_cpu(rec->len),  in emi62_load_firmware()
202 	/* De-assert reset (let the CPU run) */  in emi62_load_firmware()
220 		dev_err(&dev->dev,"%s - error loading firmware: error = %d\n",  in emi62_load_firmware()
227 	dev_err(&dev->dev, "Error\n");  in emi62_load_firmware()
241 	dev_dbg(&intf->dev, "emi62_probe\n");  in emi62_probe()
243 	dev_info(&intf->dev, "%s start\n", __func__);  in emi62_probe()
248 	return -EIO;  in emi62_probe()
256 	.name		= "emi62 - firmware loader",
265 MODULE_DESCRIPTION("Emagic EMI 6|2m firmware loader.");