1 /* cypress_firmware.c is part of the DVB USB library.
4 * see dvb-usb-init.c for copyright information.
6 * This file contains functions for downloading the firmware to Cypress FX 1
11 #include <linux/module.h>
12 #include <linux/slab.h>
13 #include <linux/usb.h>
14 #include <linux/firmware.h>
15 #include "cypress_firmware.h"
17 struct usb_cypress_controller {
19 const char *name; /* name of the usb controller */
20 u16 cs_reg; /* needs to be restarted,
21 * when the firmware has been downloaded */
24 static const struct usb_cypress_controller cypress[] = {
25 { .id = CYPRESS_AN2135, .name = "Cypress AN2135", .cs_reg = 0x7f92 },
26 { .id = CYPRESS_AN2235, .name = "Cypress AN2235", .cs_reg = 0x7f92 },
27 { .id = CYPRESS_FX2, .name = "Cypress FX2", .cs_reg = 0xe600 },
31 * load a firmware packet to the device
33 static int usb_cypress_writemem(struct usb_device *udev, u16 addr, u8 *data,
36 return usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
37 0xa0, USB_TYPE_VENDOR, addr, 0x00, data, len, 5000);
40 static int cypress_get_hexline(const struct firmware *fw,
41 struct hexline *hx, int *pos)
43 u8 *b = (u8 *) &fw->data[*pos];
49 memset(hx, 0, sizeof(struct hexline));
52 if ((*pos + hx->len + 4) >= fw->size)
55 hx->addr = b[1] | (b[2] << 8);
58 if (hx->type == 0x04) {
59 /* b[4] and b[5] are the Extended linear address record data
61 hx->addr |= (b[4] << 24) | (b[5] << 16);
64 memcpy(hx->data, &b[data_offs], hx->len);
65 hx->chk = b[hx->len + data_offs];
71 int cypress_load_firmware(struct usb_device *udev,
72 const struct firmware *fw, int type)
77 hx = kmalloc(sizeof(struct hexline), GFP_KERNEL);
79 dev_err(&udev->dev, "%s: kmalloc() failed\n", KBUILD_MODNAME);
85 ret = usb_cypress_writemem(udev, cypress[type].cs_reg, hx->data, 1);
87 dev_err(&udev->dev, "%s: CPU stop failed=%d\n",
93 /* write firmware to memory */
95 ret = cypress_get_hexline(fw, hx, &pos);
101 ret = usb_cypress_writemem(udev, hx->addr, hx->data, hx->len);
104 } else if (ret != hx->len) {
106 "%s: error while transferring firmware (transferred size=%d, block size=%d)\n",
107 KBUILD_MODNAME, ret, hx->len);
115 ret = usb_cypress_writemem(udev, cypress[type].cs_reg, hx->data, 1);
117 dev_err(&udev->dev, "%s: CPU start failed=%d\n",
118 KBUILD_MODNAME, ret);
128 EXPORT_SYMBOL(cypress_load_firmware);
131 MODULE_DESCRIPTION("Cypress firmware download");
132 MODULE_LICENSE("GPL");