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131 lines
3.1 KiB
131 lines
3.1 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* cypress_firmware.c is part of the DVB USB library. |
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* |
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* Copyright (C) 2004-6 Patrick Boettcher ([email protected]) |
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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 |
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* and 2 based devices. |
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* |
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*/ |
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#include <linux/module.h> |
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#include <linux/slab.h> |
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#include <linux/usb.h> |
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#include <linux/firmware.h> |
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#include "cypress_firmware.h" |
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struct usb_cypress_controller { |
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u8 id; |
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const char *name; /* name of the usb controller */ |
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u16 cs_reg; /* needs to be restarted, |
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* when the firmware has been downloaded */ |
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}; |
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static const struct usb_cypress_controller cypress[] = { |
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{ .id = CYPRESS_AN2135, .name = "Cypress AN2135", .cs_reg = 0x7f92 }, |
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{ .id = CYPRESS_AN2235, .name = "Cypress AN2235", .cs_reg = 0x7f92 }, |
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{ .id = CYPRESS_FX2, .name = "Cypress FX2", .cs_reg = 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, |
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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, 5000); |
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} |
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static int cypress_get_hexline(const struct firmware *fw, |
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struct hexline *hx, int *pos) |
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{ |
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u8 *b = (u8 *) &fw->data[*pos]; |
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int data_offs = 4; |
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if (*pos >= fw->size) |
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return 0; |
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memset(hx, 0, sizeof(struct hexline)); |
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hx->len = b[0]; |
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if ((*pos + hx->len + 4) >= fw->size) |
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return -EINVAL; |
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hx->addr = b[1] | (b[2] << 8); |
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hx->type = b[3]; |
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if (hx->type == 0x04) { |
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/* b[4] and b[5] are the Extended linear address record data |
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* field */ |
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hx->addr |= (b[4] << 24) | (b[5] << 16); |
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} |
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memcpy(hx->data, &b[data_offs], hx->len); |
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hx->chk = b[hx->len + data_offs]; |
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*pos += hx->len + 5; |
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return *pos; |
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} |
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int cypress_load_firmware(struct usb_device *udev, |
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const struct firmware *fw, int type) |
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{ |
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struct hexline *hx; |
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int ret, pos = 0; |
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hx = kmalloc(sizeof(*hx), GFP_KERNEL); |
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if (!hx) |
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return -ENOMEM; |
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/* stop the CPU */ |
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hx->data[0] = 1; |
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ret = usb_cypress_writemem(udev, cypress[type].cs_reg, hx->data, 1); |
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if (ret != 1) { |
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dev_err(&udev->dev, "%s: CPU stop failed=%d\n", |
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KBUILD_MODNAME, ret); |
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ret = -EIO; |
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goto err_kfree; |
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} |
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/* write firmware to memory */ |
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for (;;) { |
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ret = cypress_get_hexline(fw, hx, &pos); |
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if (ret < 0) |
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goto err_kfree; |
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else if (ret == 0) |
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break; |
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ret = usb_cypress_writemem(udev, hx->addr, hx->data, hx->len); |
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if (ret < 0) { |
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goto err_kfree; |
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} else if (ret != hx->len) { |
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dev_err(&udev->dev, |
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"%s: error while transferring firmware (transferred size=%d, block size=%d)\n", |
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KBUILD_MODNAME, ret, hx->len); |
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ret = -EIO; |
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goto err_kfree; |
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} |
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} |
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/* start the CPU */ |
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hx->data[0] = 0; |
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ret = usb_cypress_writemem(udev, cypress[type].cs_reg, hx->data, 1); |
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if (ret != 1) { |
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dev_err(&udev->dev, "%s: CPU start failed=%d\n", |
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KBUILD_MODNAME, ret); |
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ret = -EIO; |
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goto err_kfree; |
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} |
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ret = 0; |
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err_kfree: |
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kfree(hx); |
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return ret; |
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} |
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EXPORT_SYMBOL(cypress_load_firmware); |
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MODULE_AUTHOR("Antti Palosaari <[email protected]>"); |
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MODULE_DESCRIPTION("Cypress firmware download"); |
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MODULE_LICENSE("GPL");
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