drivers/media/pci/saa7164/saa7164-fw.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Driver for the NXP SAA7164 PCIe bridge
  *
  *  Copyright (c) 2010-2015 Steven Toth <stoth@kernellabs.com>
  */

 #include <linux/firmware.h>
 #include <linux/slab.h>

 #include "saa7164.h"

 #define SAA7164_REV2_FIRMWARE		"NXP7164-2010-03-10.1.fw"
 #define SAA7164_REV2_FIRMWARE_SIZE	4019072

 #define SAA7164_REV3_FIRMWARE		"NXP7164-2010-03-10.1.fw"
 #define SAA7164_REV3_FIRMWARE_SIZE	4019072

 struct fw_header {
 	u32	firmwaresize;
 	u32	bslsize;
 	u32	reserved;
 	u32	version;
 };

 static int saa7164_dl_wait_ack(struct saa7164_dev *dev, u32 reg)
 {
 	u32 timeout = SAA_DEVICE_TIMEOUT;
 	while ((saa7164_readl(reg) & 0x01) == 0) {
 		timeout -= 10;
 		if (timeout == 0) {
 			printk(KERN_ERR "%s() timeout (no d/l ack)\n",
 				__func__);
 			return -EBUSY;
 		}
 		msleep(100);
 	}

 	return 0;
 }

 static int saa7164_dl_wait_clr(struct saa7164_dev *dev, u32 reg)
 {
 	u32 timeout = SAA_DEVICE_TIMEOUT;
 	while (saa7164_readl(reg) & 0x01) {
 		timeout -= 10;
 		if (timeout == 0) {
 			printk(KERN_ERR "%s() timeout (no d/l clr)\n",
 				__func__);
 			return -EBUSY;
 		}
 		msleep(100);
 	}

 	return 0;
 }

 /* TODO: move dlflags into dev-> and change to write/readl/b */
 /* TODO: Excessive levels of debug */
 static int saa7164_downloadimage(struct saa7164_dev *dev, u8 *src, u32 srcsize,
 				 u32 dlflags, u8 __iomem *dst, u32 dstsize)
 {
 	u32 reg, timeout, offset;
 	u8 *srcbuf = NULL;
 	int ret;

 	u32 dlflag = dlflags;
 	u32 dlflag_ack = dlflag + 4;
 	u32 drflag = dlflag_ack + 4;
 	u32 drflag_ack = drflag + 4;
 	u32 bleflag = drflag_ack + 4;

 	dprintk(DBGLVL_FW,
 		"%s(image=%p, size=%d, flags=0x%x, dst=%p, dstsize=0x%x)\n",
 		__func__, src, srcsize, dlflags, dst, dstsize);

 	if ((src == NULL) || (dst == NULL)) {
 		ret = -EIO;
 		goto out;
 	}

 	srcbuf = kzalloc(4 * 1048576, GFP_KERNEL);
 	if (NULL == srcbuf) {
 		ret = -ENOMEM;
 		goto out;
 	}

 	if (srcsize > (4*1048576)) {
 		ret = -ENOMEM;
 		goto out;
 	}

 	memcpy(srcbuf, src, srcsize);

 	dprintk(DBGLVL_FW, "%s() dlflag = 0x%x\n", __func__, dlflag);
 	dprintk(DBGLVL_FW, "%s() dlflag_ack = 0x%x\n", __func__, dlflag_ack);
 	dprintk(DBGLVL_FW, "%s() drflag = 0x%x\n", __func__, drflag);
 	dprintk(DBGLVL_FW, "%s() drflag_ack = 0x%x\n", __func__, drflag_ack);
 	dprintk(DBGLVL_FW, "%s() bleflag = 0x%x\n", __func__, bleflag);

 	reg = saa7164_readl(dlflag);
 	dprintk(DBGLVL_FW, "%s() dlflag (0x%x)= 0x%x\n", __func__, dlflag, reg);
 	if (reg == 1)
 		dprintk(DBGLVL_FW,
 			"%s() Download flag already set, please reboot\n",
 			__func__);

 	/* Indicate download start */
 	saa7164_writel(dlflag, 1);
 	ret = saa7164_dl_wait_ack(dev, dlflag_ack);
 	if (ret < 0)
 		goto out;

 	/* Ack download start, then wait for wait */
 	saa7164_writel(dlflag, 0);
 	ret = saa7164_dl_wait_clr(dev, dlflag_ack);
 	if (ret < 0)
 		goto out;

 	/* Deal with the raw firmware, in the appropriate chunk size */
 	for (offset = 0; srcsize > dstsize;
 		srcsize -= dstsize, offset += dstsize) {

 		dprintk(DBGLVL_FW, "%s() memcpy %d\n", __func__, dstsize);
 		memcpy_toio(dst, srcbuf + offset, dstsize);

 		/* Flag the data as ready */
 		saa7164_writel(drflag, 1);
 		ret = saa7164_dl_wait_ack(dev, drflag_ack);
 		if (ret < 0)
 			goto out;

 		/* Wait for indication data was received */
 		saa7164_writel(drflag, 0);
 		ret = saa7164_dl_wait_clr(dev, drflag_ack);
 		if (ret < 0)
 			goto out;

 	}

 	dprintk(DBGLVL_FW, "%s() memcpy(l) %d\n", __func__, dstsize);
 	/* Write last block to the device */
 	memcpy_toio(dst, srcbuf+offset, srcsize);

 	/* Flag the data as ready */
 	saa7164_writel(drflag, 1);
 	ret = saa7164_dl_wait_ack(dev, drflag_ack);
 	if (ret < 0)
 		goto out;

 	saa7164_writel(drflag, 0);
 	timeout = 0;
 	while (saa7164_readl(bleflag) != SAA_DEVICE_IMAGE_BOOTING) {
 		if (saa7164_readl(bleflag) & SAA_DEVICE_IMAGE_CORRUPT) {
 			printk(KERN_ERR "%s() image corrupt\n", __func__);
 			ret = -EBUSY;
 			goto out;
 		}

 		if (saa7164_readl(bleflag) & SAA_DEVICE_MEMORY_CORRUPT) {
 			printk(KERN_ERR "%s() device memory corrupt\n",
 				__func__);
 			ret = -EBUSY;
 			goto out;
 		}

 		msleep(10); /* Checkpatch throws a < 20ms warning */
 		if (timeout++ > 60)
 			break;
 	}

 	printk(KERN_INFO "%s() Image downloaded, booting...\n", __func__);

 	ret = saa7164_dl_wait_clr(dev, drflag_ack);
 	if (ret < 0)
 		goto out;

 	printk(KERN_INFO "%s() Image booted successfully.\n", __func__);
 	ret = 0;

 out:
 	kfree(srcbuf);
 	return ret;
 }

 /* TODO: Excessive debug */
 /* Load the firmware. Optionally it can be in ROM or newer versions
  * can be on disk, saving the expense of the ROM hardware. */
 int saa7164_downloadfirmware(struct saa7164_dev *dev)
 {
 	/* u32 second_timeout = 60 * SAA_DEVICE_TIMEOUT; */
 	u32 tmp, filesize, version, err_flags, first_timeout, fwlength;
 	u32 second_timeout, updatebootloader = 1, bootloadersize = 0;
 	const struct firmware *fw = NULL;
 	struct fw_header *hdr, *boothdr = NULL, *fwhdr;
 	u32 bootloaderversion = 0, fwloadersize;
 	u8 *bootloaderoffset = NULL, *fwloaderoffset;
 	char *fwname;
 	int ret;

 	dprintk(DBGLVL_FW, "%s()\n", __func__);

 	if (saa7164_boards[dev->board].chiprev == SAA7164_CHIP_REV2) {
 		fwname = SAA7164_REV2_FIRMWARE;
 		fwlength = SAA7164_REV2_FIRMWARE_SIZE;
 	} else {
 		fwname = SAA7164_REV3_FIRMWARE;
 		fwlength = SAA7164_REV3_FIRMWARE_SIZE;
 	}

 	version = saa7164_getcurrentfirmwareversion(dev);

 	if (version == 0x00) {

 		second_timeout = 100;
 		first_timeout = 100;
 		err_flags = saa7164_readl(SAA_BOOTLOADERERROR_FLAGS);
 		dprintk(DBGLVL_FW, "%s() err_flags = %x\n",
 			__func__, err_flags);

 		while (err_flags != SAA_DEVICE_IMAGE_BOOTING) {
 			dprintk(DBGLVL_FW, "%s() err_flags = %x\n",
 				__func__, err_flags);
 			msleep(10); /* Checkpatch throws a < 20ms warning */

 			if (err_flags & SAA_DEVICE_IMAGE_CORRUPT) {
 				printk(KERN_ERR "%s() firmware corrupt\n",
 					__func__);
 				break;
 			}
 			if (err_flags & SAA_DEVICE_MEMORY_CORRUPT) {
 				printk(KERN_ERR "%s() device memory corrupt\n",
 					__func__);
 				break;
 			}
 			if (err_flags & SAA_DEVICE_NO_IMAGE) {
 				printk(KERN_ERR "%s() no first image\n",
 				__func__);
 				break;
 			}
 			if (err_flags & SAA_DEVICE_IMAGE_SEARCHING) {
 				first_timeout -= 10;
 				if (first_timeout == 0) {
 					printk(KERN_ERR
 						"%s() no first image\n",
 						__func__);
 					break;
 				}
 			} else if (err_flags & SAA_DEVICE_IMAGE_LOADING) {
 				second_timeout -= 10;
 				if (second_timeout == 0) {
 					printk(KERN_ERR
 					"%s() FW load time exceeded\n",
 						__func__);
 					break;
 				}
 			} else {
 				second_timeout -= 10;
 				if (second_timeout == 0) {
 					printk(KERN_ERR
 					"%s() Unknown bootloader flags 0x%x\n",
 						__func__, err_flags);
 					break;
 				}
 			}

 			err_flags = saa7164_readl(SAA_BOOTLOADERERROR_FLAGS);
 		} /* While != Booting */

 		if (err_flags == SAA_DEVICE_IMAGE_BOOTING) {
 			dprintk(DBGLVL_FW, "%s() Loader 1 has loaded.\n",
 				__func__);
 			first_timeout = SAA_DEVICE_TIMEOUT;
 			second_timeout = 100;

 			err_flags = saa7164_readl(SAA_SECONDSTAGEERROR_FLAGS);
 			dprintk(DBGLVL_FW, "%s() err_flags2 = %x\n",
 				__func__, err_flags);
 			while (err_flags != SAA_DEVICE_IMAGE_BOOTING) {
 				dprintk(DBGLVL_FW, "%s() err_flags2 = %x\n",
 					__func__, err_flags);
 				msleep(10); /* Checkpatch throws a < 20ms warning */

 				if (err_flags & SAA_DEVICE_IMAGE_CORRUPT) {
 					printk(KERN_ERR
 						"%s() firmware corrupt\n",
 						__func__);
 					break;
 				}
 				if (err_flags & SAA_DEVICE_MEMORY_CORRUPT) {
 					printk(KERN_ERR
 						"%s() device memory corrupt\n",
 						__func__);
 					break;
 				}
 				if (err_flags & SAA_DEVICE_NO_IMAGE) {
 					printk(KERN_ERR "%s() no second image\n",
 						__func__);
 					break;
 				}
 				if (err_flags & SAA_DEVICE_IMAGE_SEARCHING) {
 					first_timeout -= 10;
 					if (first_timeout == 0) {
 						printk(KERN_ERR
 						"%s() no second image\n",
 							__func__);
 						break;
 					}
 				} else if (err_flags &
 					SAA_DEVICE_IMAGE_LOADING) {
 					second_timeout -= 10;
 					if (second_timeout == 0) {
 						printk(KERN_ERR
 						"%s() FW load time exceeded\n",
 							__func__);
 						break;
 					}
 				} else {
 					second_timeout -= 10;
 					if (second_timeout == 0) {
 						printk(KERN_ERR
 					"%s() Unknown bootloader flags 0x%x\n",
 							__func__, err_flags);
 						break;
 					}
 				}

 				err_flags =
 				saa7164_readl(SAA_SECONDSTAGEERROR_FLAGS);
 			} /* err_flags != SAA_DEVICE_IMAGE_BOOTING */

 			dprintk(DBGLVL_FW, "%s() Loader flags 1:0x%x 2:0x%x.\n",
 				__func__,
 				saa7164_readl(SAA_BOOTLOADERERROR_FLAGS),
 				saa7164_readl(SAA_SECONDSTAGEERROR_FLAGS));

 		} /* err_flags == SAA_DEVICE_IMAGE_BOOTING */

 		/* It's possible for both firmwares to have booted,
 		 * but that doesn't mean they've finished booting yet.
 		 */
 		if ((saa7164_readl(SAA_BOOTLOADERERROR_FLAGS) ==
 			SAA_DEVICE_IMAGE_BOOTING) &&
 			(saa7164_readl(SAA_SECONDSTAGEERROR_FLAGS) ==
 			SAA_DEVICE_IMAGE_BOOTING)) {


 			dprintk(DBGLVL_FW, "%s() Loader 2 has loaded.\n",
 				__func__);

 			first_timeout = SAA_DEVICE_TIMEOUT;
 			while (first_timeout) {
 				msleep(10); /* Checkpatch throws a < 20ms warning */

 				version =
 					saa7164_getcurrentfirmwareversion(dev);
 				if (version) {
 					dprintk(DBGLVL_FW,
 					"%s() All f/w loaded successfully\n",
 						__func__);
 					break;
 				} else {
 					first_timeout -= 10;
 					if (first_timeout == 0) {
 						printk(KERN_ERR
 						"%s() FW did not boot\n",
 							__func__);
 						break;
 					}
 				}
 			}
 		}
 		version = saa7164_getcurrentfirmwareversion(dev);
 	} /* version == 0 */

 	/* Has the firmware really booted? */
 	if ((saa7164_readl(SAA_BOOTLOADERERROR_FLAGS) ==
 		SAA_DEVICE_IMAGE_BOOTING) &&
 		(saa7164_readl(SAA_SECONDSTAGEERROR_FLAGS) ==
 		SAA_DEVICE_IMAGE_BOOTING) && (version == 0)) {

 		printk(KERN_ERR
 			"%s() The firmware hung, probably bad firmware\n",
 			__func__);

 		/* Tell the second stage loader we have a deadlock */
 		saa7164_writel(SAA_DEVICE_DEADLOCK_DETECTED_OFFSET,
 			SAA_DEVICE_DEADLOCK_DETECTED);

 		saa7164_getfirmwarestatus(dev);

 		return -ENOMEM;
 	}

 	dprintk(DBGLVL_FW, "Device has Firmware Version %d.%d.%d.%d\n",
 		(version & 0x0000fc00) >> 10,
 		(version & 0x000003e0) >> 5,
 		(version & 0x0000001f),
 		(version & 0xffff0000) >> 16);

 	/* Load the firmware from the disk if required */
 	if (version == 0) {

 		printk(KERN_INFO "%s() Waiting for firmware upload (%s)\n",
 			__func__, fwname);

 		ret = request_firmware(&fw, fwname, &dev->pci->dev);
 		if (ret) {
 			printk(KERN_ERR "%s() Upload failed. (file not found?)\n",
 			       __func__);
 			return -ENOMEM;
 		}

 		printk(KERN_INFO "%s() firmware read %zu bytes.\n",
 			__func__, fw->size);

 		if (fw->size != fwlength) {
 			printk(KERN_ERR "saa7164: firmware incorrect size %zu != %u\n",
 				fw->size, fwlength);
 			ret = -ENOMEM;
 			goto out;
 		}

 		printk(KERN_INFO "%s() firmware loaded.\n", __func__);

 		hdr = (struct fw_header *)fw->data;
 		printk(KERN_INFO "Firmware file header part 1:\n");
 		printk(KERN_INFO " .FirmwareSize = 0x%x\n", hdr->firmwaresize);
 		printk(KERN_INFO " .BSLSize = 0x%x\n", hdr->bslsize);
 		printk(KERN_INFO " .Reserved = 0x%x\n", hdr->reserved);
 		printk(KERN_INFO " .Version = 0x%x\n", hdr->version);

 		/* Retrieve bootloader if reqd */
 		if ((hdr->firmwaresize == 0) && (hdr->bslsize == 0))
 			/* Second bootloader in the firmware file */
 			filesize = hdr->reserved * 16;
 		else
 			filesize = (hdr->firmwaresize + hdr->bslsize) *
 				16 + sizeof(struct fw_header);

 		printk(KERN_INFO "%s() SecBootLoader.FileSize = %d\n",
 			__func__, filesize);

 		/* Get bootloader (if reqd) and firmware header */
 		if ((hdr->firmwaresize == 0) && (hdr->bslsize == 0)) {
 			/* Second boot loader is required */

 			/* Get the loader header */
 			boothdr = (struct fw_header *)(fw->data +
 				sizeof(struct fw_header));

 			bootloaderversion =
 				saa7164_readl(SAA_DEVICE_2ND_VERSION);
 			dprintk(DBGLVL_FW, "Onboard BootLoader:\n");
 			dprintk(DBGLVL_FW, "->Flag 0x%x\n",
 				saa7164_readl(SAA_BOOTLOADERERROR_FLAGS));
 			dprintk(DBGLVL_FW, "->Ack 0x%x\n",
 				saa7164_readl(SAA_DATAREADY_FLAG_ACK));
 			dprintk(DBGLVL_FW, "->FW Version 0x%x\n", version);
 			dprintk(DBGLVL_FW, "->Loader Version 0x%x\n",
 				bootloaderversion);

 			if ((saa7164_readl(SAA_BOOTLOADERERROR_FLAGS) ==
 				0x03) && (saa7164_readl(SAA_DATAREADY_FLAG_ACK)
 				== 0x00) && (version == 0x00)) {

 				dprintk(DBGLVL_FW, "BootLoader version in  rom %d.%d.%d.%d\n",
 					(bootloaderversion & 0x0000fc00) >> 10,
 					(bootloaderversion & 0x000003e0) >> 5,
 					(bootloaderversion & 0x0000001f),
 					(bootloaderversion & 0xffff0000) >> 16
 					);
 				dprintk(DBGLVL_FW, "BootLoader version in file %d.%d.%d.%d\n",
 					(boothdr->version & 0x0000fc00) >> 10,
 					(boothdr->version & 0x000003e0) >> 5,
 					(boothdr->version & 0x0000001f),
 					(boothdr->version & 0xffff0000) >> 16
 					);

 				if (bootloaderversion == boothdr->version)
 					updatebootloader = 0;
 			}

 			/* Calculate offset to firmware header */
 			tmp = (boothdr->firmwaresize + boothdr->bslsize) * 16 +
 				(sizeof(struct fw_header) +
 				sizeof(struct fw_header));

 			fwhdr = (struct fw_header *)(fw->data+tmp);
 		} else {
 			/* No second boot loader */
 			fwhdr = hdr;
 		}

 		dprintk(DBGLVL_FW, "Firmware version in file %d.%d.%d.%d\n",
 			(fwhdr->version & 0x0000fc00) >> 10,
 			(fwhdr->version & 0x000003e0) >> 5,
 			(fwhdr->version & 0x0000001f),
 			(fwhdr->version & 0xffff0000) >> 16
 			);

 		if (version == fwhdr->version) {
 			/* No download, firmware already on board */
 			ret = 0;
 			goto out;
 		}

 		if ((hdr->firmwaresize == 0) && (hdr->bslsize == 0)) {
 			if (updatebootloader) {
 				/* Get ready to upload the bootloader */
 				bootloadersize = (boothdr->firmwaresize +
 					boothdr->bslsize) * 16 +
 					sizeof(struct fw_header);

 				bootloaderoffset = (u8 *)(fw->data +
 					sizeof(struct fw_header));

 				dprintk(DBGLVL_FW, "bootloader d/l starts.\n");
 				printk(KERN_INFO "%s() FirmwareSize = 0x%x\n",
 					__func__, boothdr->firmwaresize);
 				printk(KERN_INFO "%s() BSLSize = 0x%x\n",
 					__func__, boothdr->bslsize);
 				printk(KERN_INFO "%s() Reserved = 0x%x\n",
 					__func__, boothdr->reserved);
 				printk(KERN_INFO "%s() Version = 0x%x\n",
 					__func__, boothdr->version);
 				ret = saa7164_downloadimage(
 					dev,
 					bootloaderoffset,
 					bootloadersize,
 					SAA_DOWNLOAD_FLAGS,
 					dev->bmmio + SAA_DEVICE_DOWNLOAD_OFFSET,
 					SAA_DEVICE_BUFFERBLOCKSIZE);
 				if (ret < 0) {
 					printk(KERN_ERR
 						"bootloader d/l has failed\n");
 					goto out;
 				}
 				dprintk(DBGLVL_FW,
 					"bootloader download complete.\n");

 			}

 			printk(KERN_ERR "starting firmware download(2)\n");
 			bootloadersize = (boothdr->firmwaresize +
 				boothdr->bslsize) * 16 +
 				sizeof(struct fw_header);

 			bootloaderoffset =
 				(u8 *)(fw->data + sizeof(struct fw_header));

 			fwloaderoffset = bootloaderoffset + bootloadersize;

 			/* TODO: fix this bounds overrun here with old f/ws */
 			fwloadersize = (fwhdr->firmwaresize + fwhdr->bslsize) *
 				16 + sizeof(struct fw_header);

 			ret = saa7164_downloadimage(
 				dev,
 				fwloaderoffset,
 				fwloadersize,
 				SAA_DEVICE_2ND_DOWNLOADFLAG_OFFSET,
 				dev->bmmio + SAA_DEVICE_2ND_DOWNLOAD_OFFSET,
 				SAA_DEVICE_2ND_BUFFERBLOCKSIZE);
 			if (ret < 0) {
 				printk(KERN_ERR "firmware download failed\n");
 				goto out;
 			}
 			printk(KERN_ERR "firmware download complete.\n");

 		} else {

 			/* No bootloader update reqd, download firmware only */
 			printk(KERN_ERR "starting firmware download(3)\n");

 			ret = saa7164_downloadimage(
 				dev,
 				(u8 *)fw->data,
 				fw->size,
 				SAA_DOWNLOAD_FLAGS,
 				dev->bmmio + SAA_DEVICE_DOWNLOAD_OFFSET,
 				SAA_DEVICE_BUFFERBLOCKSIZE);
 			if (ret < 0) {
 				printk(KERN_ERR "firmware download failed\n");
 				goto out;
 			}
 			printk(KERN_ERR "firmware download complete.\n");
 		}
 	}

 	dev->firmwareloaded = 1;
 	ret = 0;

 out:
 	release_firmware(fw);
 	return ret;
 }
	// SPDX-License-Identifier: GPL-2.0-or-later
	/*
	* Driver for the NXP SAA7164 PCIe bridge
	*
	* Copyright (c) 2010-2015 Steven Toth <stoth@kernellabs.com>
	*/

	#include <linux/firmware.h>
	#include <linux/slab.h>

	#include "saa7164.h"

	#define SAA7164_REV2_FIRMWARE "NXP7164-2010-03-10.1.fw"
	#define SAA7164_REV2_FIRMWARE_SIZE 4019072

	#define SAA7164_REV3_FIRMWARE "NXP7164-2010-03-10.1.fw"
	#define SAA7164_REV3_FIRMWARE_SIZE 4019072

	struct fw_header {
	u32 firmwaresize;
	u32 bslsize;
	u32 reserved;
	u32 version;
	};

	static int saa7164_dl_wait_ack(struct saa7164_dev *dev, u32 reg)
	{
	u32 timeout = SAA_DEVICE_TIMEOUT;
	while ((saa7164_readl(reg) & 0x01) == 0) {
	timeout -= 10;
	if (timeout == 0) {
	printk(KERN_ERR "%s() timeout (no d/l ack)\n",
	__func__);
	return -EBUSY;
	}
	msleep(100);
	}

	return 0;
	}

	static int saa7164_dl_wait_clr(struct saa7164_dev *dev, u32 reg)
	{
	u32 timeout = SAA_DEVICE_TIMEOUT;
	while (saa7164_readl(reg) & 0x01) {
	timeout -= 10;
	if (timeout == 0) {
	printk(KERN_ERR "%s() timeout (no d/l clr)\n",
	__func__);
	return -EBUSY;
	}
	msleep(100);
	}

	return 0;
	}

	/* TODO: move dlflags into dev-> and change to write/readl/b */
	/* TODO: Excessive levels of debug */
	static int saa7164_downloadimage(struct saa7164_dev dev, u8 src, u32 srcsize,
	u32 dlflags, u8 __iomem *dst, u32 dstsize)
	{
	u32 reg, timeout, offset;
	u8 *srcbuf = NULL;
	int ret;

	u32 dlflag = dlflags;
	u32 dlflag_ack = dlflag + 4;
	u32 drflag = dlflag_ack + 4;
	u32 drflag_ack = drflag + 4;
	u32 bleflag = drflag_ack + 4;

	dprintk(DBGLVL_FW,
	"%s(image=%p, size=%d, flags=0x%x, dst=%p, dstsize=0x%x)\n",
	__func__, src, srcsize, dlflags, dst, dstsize);

	if ((src == NULL) \|\| (dst == NULL)) {
	ret = -EIO;
	goto out;
	}

	srcbuf = kzalloc(4 * 1048576, GFP_KERNEL);
	if (NULL == srcbuf) {
	ret = -ENOMEM;
	goto out;
	}

	if (srcsize > (4*1048576)) {
	ret = -ENOMEM;
	goto out;
	}

	memcpy(srcbuf, src, srcsize);

	dprintk(DBGLVL_FW, "%s() dlflag = 0x%x\n", __func__, dlflag);
	dprintk(DBGLVL_FW, "%s() dlflag_ack = 0x%x\n", __func__, dlflag_ack);
	dprintk(DBGLVL_FW, "%s() drflag = 0x%x\n", __func__, drflag);
	dprintk(DBGLVL_FW, "%s() drflag_ack = 0x%x\n", __func__, drflag_ack);
	dprintk(DBGLVL_FW, "%s() bleflag = 0x%x\n", __func__, bleflag);

	reg = saa7164_readl(dlflag);
	dprintk(DBGLVL_FW, "%s() dlflag (0x%x)= 0x%x\n", __func__, dlflag, reg);
	if (reg == 1)
	dprintk(DBGLVL_FW,
	"%s() Download flag already set, please reboot\n",
	__func__);

	/* Indicate download start */
	saa7164_writel(dlflag, 1);
	ret = saa7164_dl_wait_ack(dev, dlflag_ack);
	if (ret < 0)
	goto out;

	/* Ack download start, then wait for wait */
	saa7164_writel(dlflag, 0);
	ret = saa7164_dl_wait_clr(dev, dlflag_ack);
	if (ret < 0)
	goto out;

	/* Deal with the raw firmware, in the appropriate chunk size */
	for (offset = 0; srcsize > dstsize;
	srcsize -= dstsize, offset += dstsize) {

	dprintk(DBGLVL_FW, "%s() memcpy %d\n", __func__, dstsize);
	memcpy_toio(dst, srcbuf + offset, dstsize);

	/* Flag the data as ready */
	saa7164_writel(drflag, 1);
	ret = saa7164_dl_wait_ack(dev, drflag_ack);
	if (ret < 0)
	goto out;

	/* Wait for indication data was received */
	saa7164_writel(drflag, 0);
	ret = saa7164_dl_wait_clr(dev, drflag_ack);
	if (ret < 0)
	goto out;

	}

	dprintk(DBGLVL_FW, "%s() memcpy(l) %d\n", __func__, dstsize);
	/* Write last block to the device */
	memcpy_toio(dst, srcbuf+offset, srcsize);

	/* Flag the data as ready */
	saa7164_writel(drflag, 1);
	ret = saa7164_dl_wait_ack(dev, drflag_ack);
	if (ret < 0)
	goto out;

	saa7164_writel(drflag, 0);
	timeout = 0;
	while (saa7164_readl(bleflag) != SAA_DEVICE_IMAGE_BOOTING) {
	if (saa7164_readl(bleflag) & SAA_DEVICE_IMAGE_CORRUPT) {
	printk(KERN_ERR "%s() image corrupt\n", __func__);
	ret = -EBUSY;
	goto out;
	}

	if (saa7164_readl(bleflag) & SAA_DEVICE_MEMORY_CORRUPT) {
	printk(KERN_ERR "%s() device memory corrupt\n",
	__func__);
	ret = -EBUSY;
	goto out;
	}

	msleep(10); /* Checkpatch throws a < 20ms warning */
	if (timeout++ > 60)
	break;
	}

	printk(KERN_INFO "%s() Image downloaded, booting...\n", __func__);

	ret = saa7164_dl_wait_clr(dev, drflag_ack);
	if (ret < 0)
	goto out;

	printk(KERN_INFO "%s() Image booted successfully.\n", __func__);
	ret = 0;

	out:
	kfree(srcbuf);
	return ret;
	}

	/* TODO: Excessive debug */
	/* Load the firmware. Optionally it can be in ROM or newer versions
	* can be on disk, saving the expense of the ROM hardware. */
	int saa7164_downloadfirmware(struct saa7164_dev *dev)
	{
	/* u32 second_timeout = 60 * SAA_DEVICE_TIMEOUT; */
	u32 tmp, filesize, version, err_flags, first_timeout, fwlength;
	u32 second_timeout, updatebootloader = 1, bootloadersize = 0;
	const struct firmware *fw = NULL;
	struct fw_header hdr, boothdr = NULL, *fwhdr;
	u32 bootloaderversion = 0, fwloadersize;
	u8 bootloaderoffset = NULL, fwloaderoffset;
	char *fwname;
	int ret;

	dprintk(DBGLVL_FW, "%s()\n", __func__);

	if (saa7164_boards[dev->board].chiprev == SAA7164_CHIP_REV2) {
	fwname = SAA7164_REV2_FIRMWARE;
	fwlength = SAA7164_REV2_FIRMWARE_SIZE;
	} else {
	fwname = SAA7164_REV3_FIRMWARE;
	fwlength = SAA7164_REV3_FIRMWARE_SIZE;
	}

	version = saa7164_getcurrentfirmwareversion(dev);

	if (version == 0x00) {

	second_timeout = 100;
	first_timeout = 100;
	err_flags = saa7164_readl(SAA_BOOTLOADERERROR_FLAGS);
	dprintk(DBGLVL_FW, "%s() err_flags = %x\n",
	__func__, err_flags);

	while (err_flags != SAA_DEVICE_IMAGE_BOOTING) {
	dprintk(DBGLVL_FW, "%s() err_flags = %x\n",
	__func__, err_flags);
	msleep(10); /* Checkpatch throws a < 20ms warning */

	if (err_flags & SAA_DEVICE_IMAGE_CORRUPT) {
	printk(KERN_ERR "%s() firmware corrupt\n",
	__func__);
	break;
	}
	if (err_flags & SAA_DEVICE_MEMORY_CORRUPT) {
	printk(KERN_ERR "%s() device memory corrupt\n",
	__func__);
	break;
	}
	if (err_flags & SAA_DEVICE_NO_IMAGE) {
	printk(KERN_ERR "%s() no first image\n",
	__func__);
	break;
	}
	if (err_flags & SAA_DEVICE_IMAGE_SEARCHING) {
	first_timeout -= 10;
	if (first_timeout == 0) {
	printk(KERN_ERR
	"%s() no first image\n",
	__func__);
	break;
	}
	} else if (err_flags & SAA_DEVICE_IMAGE_LOADING) {
	second_timeout -= 10;
	if (second_timeout == 0) {
	printk(KERN_ERR
	"%s() FW load time exceeded\n",
	__func__);
	break;
	}
	} else {
	second_timeout -= 10;
	if (second_timeout == 0) {
	printk(KERN_ERR
	"%s() Unknown bootloader flags 0x%x\n",
	__func__, err_flags);
	break;
	}
	}

	err_flags = saa7164_readl(SAA_BOOTLOADERERROR_FLAGS);
	} /* While != Booting */

	if (err_flags == SAA_DEVICE_IMAGE_BOOTING) {
	dprintk(DBGLVL_FW, "%s() Loader 1 has loaded.\n",
	__func__);
	first_timeout = SAA_DEVICE_TIMEOUT;
	second_timeout = 100;

	err_flags = saa7164_readl(SAA_SECONDSTAGEERROR_FLAGS);
	dprintk(DBGLVL_FW, "%s() err_flags2 = %x\n",
	__func__, err_flags);
	while (err_flags != SAA_DEVICE_IMAGE_BOOTING) {
	dprintk(DBGLVL_FW, "%s() err_flags2 = %x\n",
	__func__, err_flags);
	msleep(10); /* Checkpatch throws a < 20ms warning */

	if (err_flags & SAA_DEVICE_IMAGE_CORRUPT) {
	printk(KERN_ERR
	"%s() firmware corrupt\n",
	__func__);
	break;
	}
	if (err_flags & SAA_DEVICE_MEMORY_CORRUPT) {
	printk(KERN_ERR
	"%s() device memory corrupt\n",
	__func__);
	break;
	}
	if (err_flags & SAA_DEVICE_NO_IMAGE) {
	printk(KERN_ERR "%s() no second image\n",
	__func__);
	break;
	}
	if (err_flags & SAA_DEVICE_IMAGE_SEARCHING) {
	first_timeout -= 10;
	if (first_timeout == 0) {
	printk(KERN_ERR
	"%s() no second image\n",
	__func__);
	break;
	}
	} else if (err_flags &
	SAA_DEVICE_IMAGE_LOADING) {
	second_timeout -= 10;
	if (second_timeout == 0) {
	printk(KERN_ERR
	"%s() FW load time exceeded\n",
	__func__);
	break;
	}
	} else {
	second_timeout -= 10;
	if (second_timeout == 0) {
	printk(KERN_ERR
	"%s() Unknown bootloader flags 0x%x\n",
	__func__, err_flags);
	break;
	}
	}

	err_flags =
	saa7164_readl(SAA_SECONDSTAGEERROR_FLAGS);
	} /* err_flags != SAA_DEVICE_IMAGE_BOOTING */

	dprintk(DBGLVL_FW, "%s() Loader flags 1:0x%x 2:0x%x.\n",
	__func__,
	saa7164_readl(SAA_BOOTLOADERERROR_FLAGS),
	saa7164_readl(SAA_SECONDSTAGEERROR_FLAGS));

	} /* err_flags == SAA_DEVICE_IMAGE_BOOTING */

	/* It's possible for both firmwares to have booted,
	* but that doesn't mean they've finished booting yet.
	*/
	if ((saa7164_readl(SAA_BOOTLOADERERROR_FLAGS) ==
	SAA_DEVICE_IMAGE_BOOTING) &&
	(saa7164_readl(SAA_SECONDSTAGEERROR_FLAGS) ==
	SAA_DEVICE_IMAGE_BOOTING)) {


	dprintk(DBGLVL_FW, "%s() Loader 2 has loaded.\n",
	__func__);

	first_timeout = SAA_DEVICE_TIMEOUT;
	while (first_timeout) {
	msleep(10); /* Checkpatch throws a < 20ms warning */

	version =
	saa7164_getcurrentfirmwareversion(dev);
	if (version) {
	dprintk(DBGLVL_FW,
	"%s() All f/w loaded successfully\n",
	__func__);
	break;
	} else {
	first_timeout -= 10;
	if (first_timeout == 0) {
	printk(KERN_ERR
	"%s() FW did not boot\n",
	__func__);
	break;
	}
	}
	}
	}
	version = saa7164_getcurrentfirmwareversion(dev);
	} /* version == 0 */

	/* Has the firmware really booted? */
	if ((saa7164_readl(SAA_BOOTLOADERERROR_FLAGS) ==
	SAA_DEVICE_IMAGE_BOOTING) &&
	(saa7164_readl(SAA_SECONDSTAGEERROR_FLAGS) ==
	SAA_DEVICE_IMAGE_BOOTING) && (version == 0)) {

	printk(KERN_ERR
	"%s() The firmware hung, probably bad firmware\n",
	__func__);

	/* Tell the second stage loader we have a deadlock */
	saa7164_writel(SAA_DEVICE_DEADLOCK_DETECTED_OFFSET,
	SAA_DEVICE_DEADLOCK_DETECTED);

	saa7164_getfirmwarestatus(dev);

	return -ENOMEM;
	}

	dprintk(DBGLVL_FW, "Device has Firmware Version %d.%d.%d.%d\n",
	(version & 0x0000fc00) >> 10,
	(version & 0x000003e0) >> 5,
	(version & 0x0000001f),
	(version & 0xffff0000) >> 16);

	/* Load the firmware from the disk if required */
	if (version == 0) {

	printk(KERN_INFO "%s() Waiting for firmware upload (%s)\n",
	__func__, fwname);

	ret = request_firmware(&fw, fwname, &dev->pci->dev);
	if (ret) {
	printk(KERN_ERR "%s() Upload failed. (file not found?)\n",
	__func__);
	return -ENOMEM;
	}

	printk(KERN_INFO "%s() firmware read %zu bytes.\n",
	__func__, fw->size);

	if (fw->size != fwlength) {
	printk(KERN_ERR "saa7164: firmware incorrect size %zu != %u\n",
	fw->size, fwlength);
	ret = -ENOMEM;
	goto out;
	}

	printk(KERN_INFO "%s() firmware loaded.\n", __func__);

	hdr = (struct fw_header *)fw->data;
	printk(KERN_INFO "Firmware file header part 1:\n");
	printk(KERN_INFO " .FirmwareSize = 0x%x\n", hdr->firmwaresize);
	printk(KERN_INFO " .BSLSize = 0x%x\n", hdr->bslsize);
	printk(KERN_INFO " .Reserved = 0x%x\n", hdr->reserved);
	printk(KERN_INFO " .Version = 0x%x\n", hdr->version);

	/* Retrieve bootloader if reqd */
	if ((hdr->firmwaresize == 0) && (hdr->bslsize == 0))
	/* Second bootloader in the firmware file */
	filesize = hdr->reserved * 16;
	else
	filesize = (hdr->firmwaresize + hdr->bslsize) *
	16 + sizeof(struct fw_header);

	printk(KERN_INFO "%s() SecBootLoader.FileSize = %d\n",
	__func__, filesize);

	/* Get bootloader (if reqd) and firmware header */
	if ((hdr->firmwaresize == 0) && (hdr->bslsize == 0)) {
	/* Second boot loader is required */

	/* Get the loader header */
	boothdr = (struct fw_header *)(fw->data +
	sizeof(struct fw_header));

	bootloaderversion =
	saa7164_readl(SAA_DEVICE_2ND_VERSION);
	dprintk(DBGLVL_FW, "Onboard BootLoader:\n");
	dprintk(DBGLVL_FW, "->Flag 0x%x\n",
	saa7164_readl(SAA_BOOTLOADERERROR_FLAGS));
	dprintk(DBGLVL_FW, "->Ack 0x%x\n",
	saa7164_readl(SAA_DATAREADY_FLAG_ACK));
	dprintk(DBGLVL_FW, "->FW Version 0x%x\n", version);
	dprintk(DBGLVL_FW, "->Loader Version 0x%x\n",
	bootloaderversion);

	if ((saa7164_readl(SAA_BOOTLOADERERROR_FLAGS) ==
	0x03) && (saa7164_readl(SAA_DATAREADY_FLAG_ACK)
	== 0x00) && (version == 0x00)) {

	dprintk(DBGLVL_FW, "BootLoader version in rom %d.%d.%d.%d\n",
	(bootloaderversion & 0x0000fc00) >> 10,
	(bootloaderversion & 0x000003e0) >> 5,
	(bootloaderversion & 0x0000001f),
	(bootloaderversion & 0xffff0000) >> 16
	);
	dprintk(DBGLVL_FW, "BootLoader version in file %d.%d.%d.%d\n",
	(boothdr->version & 0x0000fc00) >> 10,
	(boothdr->version & 0x000003e0) >> 5,
	(boothdr->version & 0x0000001f),
	(boothdr->version & 0xffff0000) >> 16
	);

	if (bootloaderversion == boothdr->version)
	updatebootloader = 0;
	}

	/* Calculate offset to firmware header */
	tmp = (boothdr->firmwaresize + boothdr->bslsize) * 16 +
	(sizeof(struct fw_header) +
	sizeof(struct fw_header));

	fwhdr = (struct fw_header *)(fw->data+tmp);
	} else {
	/* No second boot loader */
	fwhdr = hdr;
	}

	dprintk(DBGLVL_FW, "Firmware version in file %d.%d.%d.%d\n",
	(fwhdr->version & 0x0000fc00) >> 10,
	(fwhdr->version & 0x000003e0) >> 5,
	(fwhdr->version & 0x0000001f),
	(fwhdr->version & 0xffff0000) >> 16
	);

	if (version == fwhdr->version) {
	/* No download, firmware already on board */
	ret = 0;
	goto out;
	}

	if ((hdr->firmwaresize == 0) && (hdr->bslsize == 0)) {
	if (updatebootloader) {
	/* Get ready to upload the bootloader */
	bootloadersize = (boothdr->firmwaresize +
	boothdr->bslsize) * 16 +
	sizeof(struct fw_header);

	bootloaderoffset = (u8 *)(fw->data +
	sizeof(struct fw_header));

	dprintk(DBGLVL_FW, "bootloader d/l starts.\n");
	printk(KERN_INFO "%s() FirmwareSize = 0x%x\n",
	__func__, boothdr->firmwaresize);
	printk(KERN_INFO "%s() BSLSize = 0x%x\n",
	__func__, boothdr->bslsize);
	printk(KERN_INFO "%s() Reserved = 0x%x\n",
	__func__, boothdr->reserved);
	printk(KERN_INFO "%s() Version = 0x%x\n",
	__func__, boothdr->version);
	ret = saa7164_downloadimage(
	dev,
	bootloaderoffset,
	bootloadersize,
	SAA_DOWNLOAD_FLAGS,
	dev->bmmio + SAA_DEVICE_DOWNLOAD_OFFSET,
	SAA_DEVICE_BUFFERBLOCKSIZE);
	if (ret < 0) {
	printk(KERN_ERR
	"bootloader d/l has failed\n");
	goto out;
	}
	dprintk(DBGLVL_FW,
	"bootloader download complete.\n");

	}

	printk(KERN_ERR "starting firmware download(2)\n");
	bootloadersize = (boothdr->firmwaresize +
	boothdr->bslsize) * 16 +
	sizeof(struct fw_header);

	bootloaderoffset =
	(u8 *)(fw->data + sizeof(struct fw_header));

	fwloaderoffset = bootloaderoffset + bootloadersize;

	/* TODO: fix this bounds overrun here with old f/ws */
	fwloadersize = (fwhdr->firmwaresize + fwhdr->bslsize) *
	16 + sizeof(struct fw_header);

	ret = saa7164_downloadimage(
	dev,
	fwloaderoffset,
	fwloadersize,
	SAA_DEVICE_2ND_DOWNLOADFLAG_OFFSET,
	dev->bmmio + SAA_DEVICE_2ND_DOWNLOAD_OFFSET,
	SAA_DEVICE_2ND_BUFFERBLOCKSIZE);
	if (ret < 0) {
	printk(KERN_ERR "firmware download failed\n");
	goto out;
	}
	printk(KERN_ERR "firmware download complete.\n");

	} else {

	/* No bootloader update reqd, download firmware only */
	printk(KERN_ERR "starting firmware download(3)\n");

	ret = saa7164_downloadimage(
	dev,
	(u8 *)fw->data,
	fw->size,
	SAA_DOWNLOAD_FLAGS,
	dev->bmmio + SAA_DEVICE_DOWNLOAD_OFFSET,
	SAA_DEVICE_BUFFERBLOCKSIZE);
	if (ret < 0) {
	printk(KERN_ERR "firmware download failed\n");
	goto out;
	}
	printk(KERN_ERR "firmware download complete.\n");
	}
	}

	dev->firmwareloaded = 1;
	ret = 0;

	out:
	release_firmware(fw);
	return ret;
	}