1 // SPDX-License-Identifier: GPL-2.0-only
4  * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.de)
5  * see dvb-usb-init.c for copyright information.
7  * This file contains functions for downloading the firmware to Cypress FX 1
15 #include <linux/firmware.h>
20 	const char *name;	/* name of the usb controller */  member
22 				 * when the firmware has been downloaded */
26 	{ .id = CYPRESS_AN2135, .name = "Cypress AN2135", .cs_reg = 0x7f92 },
27 	{ .id = CYPRESS_AN2235, .name = "Cypress AN2235", .cs_reg = 0x7f92 },
28 	{ .id = CYPRESS_FX2,    .name = "Cypress FX2",    .cs_reg = 0xe600 },
32  * load a firmware packet to the device
41 static int cypress_get_hexline(const struct firmware *fw,  in cypress_get_hexline()
44 	u8 *b = (u8 *) &fw->data[*pos];  in cypress_get_hexline()
47 	if (*pos >= fw->size)  in cypress_get_hexline()
51 	hx->len = b[0];  in cypress_get_hexline()
53 	if ((*pos + hx->len + 4) >= fw->size)  in cypress_get_hexline()
54 		return -EINVAL;  in cypress_get_hexline()
56 	hx->addr = b[1] | (b[2] << 8);  in cypress_get_hexline()
57 	hx->type = b[3];  in cypress_get_hexline()
59 	if (hx->type == 0x04) {  in cypress_get_hexline()
62 		hx->addr |= (b[4] << 24) | (b[5] << 16);  in cypress_get_hexline()
65 	memcpy(hx->data, &b[data_offs], hx->len);  in cypress_get_hexline()
66 	hx->chk = b[hx->len + data_offs];  in cypress_get_hexline()
67 	*pos += hx->len + 5;  in cypress_get_hexline()
73 		const struct firmware *fw, int type)  in cypress_load_firmware()
80 		return -ENOMEM;  in cypress_load_firmware()
83 	hx->data[0] = 1;  in cypress_load_firmware()
84 	ret = usb_cypress_writemem(udev, cypress[type].cs_reg, hx->data, 1);  in cypress_load_firmware()
86 		dev_err(&udev->dev, "%s: CPU stop failed=%d\n",  in cypress_load_firmware()
88 		ret = -EIO;  in cypress_load_firmware()
92 	/* write firmware to memory */  in cypress_load_firmware()
100 		ret = usb_cypress_writemem(udev, hx->addr, hx->data, hx->len);  in cypress_load_firmware()
103 		} else if (ret != hx->len) {  in cypress_load_firmware()
104 			dev_err(&udev->dev,  in cypress_load_firmware()
105 					"%s: error while transferring firmware (transferred size=%d, block size=%d)\n",  in cypress_load_firmware()
106 					KBUILD_MODNAME, ret, hx->len);  in cypress_load_firmware()
107 			ret = -EIO;  in cypress_load_firmware()
113 	hx->data[0] = 0;  in cypress_load_firmware()
114 	ret = usb_cypress_writemem(udev, cypress[type].cs_reg, hx->data, 1);  in cypress_load_firmware()
116 		dev_err(&udev->dev, "%s: CPU start failed=%d\n",  in cypress_load_firmware()
118 		ret = -EIO;  in cypress_load_firmware()
130 MODULE_DESCRIPTION("Cypress firmware download");