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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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776338e121
Add generalized dvb-usb driver which supports a wide variety of devices. Signed-off-by: Patrick Boettcher <pb@linuxtv.org> Signed-off-by: Johannes Stezenbach <js@linuxtv.org> Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
101 lines
2.7 KiB
C
101 lines
2.7 KiB
C
/* dvb-usb-firmware.c is part of the DVB USB library.
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*
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* Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de)
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* see dvb-usb-init.c for copyright information.
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*
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* This file contains functions for downloading the firmware to Cypress FX 1 and 2 based devices.
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*
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* FIXME: This part does actually not belong to dvb-usb, but to the usb-subsystem.
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*/
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#include "dvb-usb-common.h"
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#include <linux/firmware.h>
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#include <linux/usb.h>
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struct usb_cypress_controller {
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int id;
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const char *name; /* name of the usb controller */
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u16 cpu_cs_register; /* needs to be restarted, when the firmware has been downloaded. */
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};
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static struct usb_cypress_controller cypress[] = {
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{ .id = CYPRESS_AN2135, .name = "Cypress AN2135", .cpu_cs_register = 0x7f92 },
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{ .id = CYPRESS_AN2235, .name = "Cypress AN2235", .cpu_cs_register = 0x7f92 },
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{ .id = CYPRESS_FX2, .name = "Cypress FX2", .cpu_cs_register = 0xe600 },
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};
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/*
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* load a firmware packet to the device
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*/
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static int usb_cypress_writemem(struct usb_device *udev,u16 addr,u8 *data, u8 len)
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{
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return usb_control_msg(udev, usb_sndctrlpipe(udev,0),
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0xa0, USB_TYPE_VENDOR, addr, 0x00, data, len, 5*HZ);
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}
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int usb_cypress_load_firmware(struct usb_device *udev, const char *filename, int type)
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{
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const struct firmware *fw = NULL;
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u16 addr;
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u8 *b,*p;
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int ret = 0,i;
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if ((ret = request_firmware(&fw, filename, &udev->dev)) != 0) {
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err("did not find the firmware file. (%s) "
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"Please see linux/Documentation/dvb/ for more details on firmware-problems.",
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filename);
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return ret;
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}
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info("downloading firmware from file '%s' to the '%s'",filename,cypress[type].name);
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p = kmalloc(fw->size,GFP_KERNEL);
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if (p != NULL) {
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u8 reset;
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/*
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* you cannot use the fw->data as buffer for
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* usb_control_msg, a new buffer has to be
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* created
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*/
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memcpy(p,fw->data,fw->size);
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/* stop the CPU */
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reset = 1;
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if ((ret = usb_cypress_writemem(udev,cypress[type].cpu_cs_register,&reset,1)) != 1)
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err("could not stop the USB controller CPU.");
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for(i = 0; p[i+3] == 0 && i < fw->size; ) {
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b = (u8 *) &p[i];
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addr = cpu_to_le16( *((u16 *) &b[1]) );
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deb_fw("writing to address 0x%04x (buffer: 0x%02x%02x)\n",addr,b[1],b[2]);
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ret = usb_cypress_writemem(udev,addr,&b[4],b[0]);
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if (ret != b[0]) {
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err("error while transferring firmware "
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"(transferred size: %d, block size: %d)",
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ret,b[0]);
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ret = -EINVAL;
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break;
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}
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i += 5 + b[0];
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}
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/* length in ret */
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if (ret > 0)
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ret = 0;
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/* restart the CPU */
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reset = 0;
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if (ret || usb_cypress_writemem(udev,cypress[type].cpu_cs_register,&reset,1) != 1) {
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err("could not restart the USB controller CPU.");
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ret = -EINVAL;
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}
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kfree(p);
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} else {
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ret = -ENOMEM;
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}
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release_firmware(fw);
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return ret;
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}
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