1 // SPDX-License-Identifier: GPL-2.0
3  * Emagic EMI 2|6 usb audio interface firmware loader.
15 #include <linux/firmware.h>
18 #define EMI26_VENDOR_ID 		0x086a  /* Emagic Soft-und Hardware GmBH */
19 #define EMI26_PRODUCT_ID		0x0100	/* EMI 2|6 without firmware */
20 #define EMI26B_PRODUCT_ID		0x0102	/* EMI 2|6 without firmware */
23 #define ANCHOR_LOAD_EXTERNAL	0xA3	/* This command is not implemented in the core. Requires firmware…
24 #define ANCHOR_LOAD_FPGA	0xA5	/* This command is not implemented in the core. Requires firmware. Em…
26 #define CPUCS_REG		0x7F92  /* EZ-USB Control and Status Register.  Bit 0 controls 8051 reset */ 
46 		dev_err(&dev->dev, "kmalloc(%d) failed.\n", length);  in emi26_writememory()
47 		return -ENOMEM;  in emi26_writememory()
60 	dev_info(&dev->dev, "%s - %d\n", __func__, reset_bit);  in emi26_set_reset()
61 	/* printk(KERN_DEBUG "%s - %d", __func__, reset_bit); */  in emi26_set_reset()
64 		dev_err(&dev->dev, "set_reset (%d) failed\n", reset_bit);  in emi26_set_reset()
73 	const struct firmware *loader_fw = NULL;  in emi26_load_firmware()
74 	const struct firmware *bitstream_fw = NULL;  in emi26_load_firmware()
75 	const struct firmware *firmware_fw = NULL;  in emi26_load_firmware()
77 	int err = -ENOMEM;  in emi26_load_firmware()
86 	err = request_ihex_firmware(&loader_fw, "emi26/loader.fw", &dev->dev);  in emi26_load_firmware()
91 				    &dev->dev);  in emi26_load_firmware()
95 	err = request_ihex_firmware(&firmware_fw, "emi26/firmware.fw",  in emi26_load_firmware()
96 				    &dev->dev);  in emi26_load_firmware()
99 		dev_err(&dev->dev, "%s - request_firmware() failed\n",  in emi26_load_firmware()
104 	/* Assert reset (stop the CPU in the EMI) */  in emi26_load_firmware()
109 	rec = (const struct ihex_binrec *)loader_fw->data;  in emi26_load_firmware()
110 	/* 1. We need to put the loader for the FPGA into the EZ-USB */  in emi26_load_firmware()
112 		err = emi26_writememory(dev, be32_to_cpu(rec->addr),  in emi26_load_firmware()
113 					rec->data, be16_to_cpu(rec->len),  in emi26_load_firmware()
120 	/* De-assert reset (let the CPU run) */  in emi26_load_firmware()
126 	/* 2. We upload the FPGA firmware into the EMI  in emi26_load_firmware()
129 	rec = (const struct ihex_binrec *)bitstream_fw->data;  in emi26_load_firmware()
132 		addr = be32_to_cpu(rec->addr);  in emi26_load_firmware()
135 		while (rec && (i + be16_to_cpu(rec->len) < FW_LOAD_SIZE)) {  in emi26_load_firmware()
136 			memcpy(buf + i, rec->data, be16_to_cpu(rec->len));  in emi26_load_firmware()
137 			i += be16_to_cpu(rec->len);  in emi26_load_firmware()
145 	/* Assert reset (stop the CPU in the EMI) */  in emi26_load_firmware()
150 	/* 3. We need to put the loader for the firmware into the EZ-USB (again...) */  in emi26_load_firmware()
151 	for (rec = (const struct ihex_binrec *)loader_fw->data;  in emi26_load_firmware()
153 		err = emi26_writememory(dev, be32_to_cpu(rec->addr),  in emi26_load_firmware()
154 					rec->data, be16_to_cpu(rec->len),  in emi26_load_firmware()
161 	/* De-assert reset (let the CPU run) */  in emi26_load_firmware()
166 	/* 4. We put the part of the firmware that lies in the external RAM into the EZ-USB */  in emi26_load_firmware()
168 	for (rec = (const struct ihex_binrec *)firmware_fw->data;  in emi26_load_firmware()
170 		if (!INTERNAL_RAM(be32_to_cpu(rec->addr))) {  in emi26_load_firmware()
171 			err = emi26_writememory(dev, be32_to_cpu(rec->addr),  in emi26_load_firmware()
172 						rec->data, be16_to_cpu(rec->len),  in emi26_load_firmware()
179 	/* Assert reset (stop the CPU in the EMI) */  in emi26_load_firmware()
184 	for (rec = (const struct ihex_binrec *)firmware_fw->data;  in emi26_load_firmware()
186 		if (INTERNAL_RAM(be32_to_cpu(rec->addr))) {  in emi26_load_firmware()
187 			err = emi26_writememory(dev, be32_to_cpu(rec->addr),  in emi26_load_firmware()
188 						rec->data, be16_to_cpu(rec->len),  in emi26_load_firmware()
195 	/* De-assert reset (let the CPU run) */  in emi26_load_firmware()
207 		dev_err(&dev->dev,"%s - error loading firmware: error = %d\n",  in emi26_load_firmware()
230 	dev_info(&intf->dev, "%s start\n", __func__);  in emi26_probe()
235 	return -EIO;  in emi26_probe()
243 	.name		= "emi26 - firmware loader",
252 MODULE_DESCRIPTION("Emagic EMI 2|6 firmware loader.");
257 MODULE_FIRMWARE("emi26/firmware.fw");