- 根目录:
- drivers
- usb
- misc
- emi26.c
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/usb.h>
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/ihex.h>
#define EMI26_VENDOR_ID 0x086a
#define EMI26_PRODUCT_ID 0x0100
#define EMI26B_PRODUCT_ID 0x0102
#define ANCHOR_LOAD_INTERNAL 0xA0
#define ANCHOR_LOAD_EXTERNAL 0xA3
#define ANCHOR_LOAD_FPGA 0xA5
#define MAX_INTERNAL_ADDRESS 0x1B3F
#define CPUCS_REG 0x7F92
#define INTERNAL_RAM(address) (address <= MAX_INTERNAL_ADDRESS)
static int emi26_writememory( struct usb_device *dev, int address,
const unsigned char *data, int length,
__u8 bRequest);
static int emi26_set_reset(struct usb_device *dev, unsigned char reset_bit);
static int emi26_load_firmware (struct usb_device *dev);
static int emi26_probe(struct usb_interface *intf, const struct usb_device_id *id);
static void emi26_disconnect(struct usb_interface *intf);
static int emi26_writememory (struct usb_device *dev, int address,
const unsigned char *data, int length,
__u8 request)
{
int result;
unsigned char *buffer = kmemdup(data, length, GFP_KERNEL);
if (!buffer) {
dev_err(&dev->dev, "kmalloc(%d) failed.\n", length);
return -ENOMEM;
}
result = usb_control_msg (dev, usb_sndctrlpipe(dev, 0), request, 0x40, address, 0, buffer, length, 300);
kfree (buffer);
return result;
}
static int emi26_set_reset (struct usb_device *dev, unsigned char reset_bit)
{
int response;
dev_info(&dev->dev, "%s - %d\n", __func__, reset_bit);
response = emi26_writememory (dev, CPUCS_REG, &reset_bit, 1, 0xa0);
if (response < 0) {
dev_err(&dev->dev, "set_reset (%d) failed\n", reset_bit);
}
return response;
}
#define FW_LOAD_SIZE 1023
static int emi26_load_firmware (struct usb_device *dev)
{
const struct firmware *loader_fw = NULL;
const struct firmware *bitstream_fw = NULL;
const struct firmware *firmware_fw = NULL;
const struct ihex_binrec *rec;
int err;
int i;
__u32 addr;
__u8 *buf;
buf = kmalloc(FW_LOAD_SIZE, GFP_KERNEL);
if (!buf) {
dev_err(&dev->dev, "%s - error loading firmware: error = %d\n",
__func__, -ENOMEM);
err = -ENOMEM;
goto wraperr;
}
err = request_ihex_firmware(&loader_fw, "emi26/loader.fw", &dev->dev);
if (err)
goto nofw;
err = request_ihex_firmware(&bitstream_fw, "emi26/bitstream.fw",
&dev->dev);
if (err)
goto nofw;
err = request_ihex_firmware(&firmware_fw, "emi26/firmware.fw",
&dev->dev);
if (err) {
nofw:
dev_err(&dev->dev, "%s - request_firmware() failed\n",
__func__);
goto wraperr;
}
err = emi26_set_reset(dev,1);
if (err < 0) {
dev_err(&dev->dev,"%s - error loading firmware: error = %d\n",
__func__, err);
goto wraperr;
}
rec = (const struct ihex_binrec *)loader_fw->data;
while (rec) {
err = emi26_writememory(dev, be32_to_cpu(rec->addr),
rec->data, be16_to_cpu(rec->len),
ANCHOR_LOAD_INTERNAL);
if (err < 0) {
err("%s - error loading firmware: error = %d", __func__, err);
goto wraperr;
}
rec = ihex_next_binrec(rec);
}
err = emi26_set_reset(dev,0);
if (err < 0) {
err("%s - error loading firmware: error = %d", __func__, err);
goto wraperr;
}
msleep(250);
rec = (const struct ihex_binrec *)bitstream_fw->data;
do {
i = 0;
addr = be32_to_cpu(rec->addr);
while (rec && (i + be16_to_cpu(rec->len) < FW_LOAD_SIZE)) {
memcpy(buf + i, rec->data, be16_to_cpu(rec->len));
i += be16_to_cpu(rec->len);
rec = ihex_next_binrec(rec);
}
err = emi26_writememory(dev, addr, buf, i, ANCHOR_LOAD_FPGA);
if (err < 0) {
err("%s - error loading firmware: error = %d", __func__, err);
goto wraperr;
}
} while (rec);
err = emi26_set_reset(dev,1);
if (err < 0) {
err("%s - error loading firmware: error = %d", __func__, err);
goto wraperr;
}
for (rec = (const struct ihex_binrec *)loader_fw->data;
rec; rec = ihex_next_binrec(rec)) {
err = emi26_writememory(dev, be32_to_cpu(rec->addr),
rec->data, be16_to_cpu(rec->len),
ANCHOR_LOAD_INTERNAL);
if (err < 0) {
err("%s - error loading firmware: error = %d", __func__, err);
goto wraperr;
}
}
msleep(250);
err = emi26_set_reset(dev,0);
if (err < 0) {
err("%s - error loading firmware: error = %d", __func__, err);
goto wraperr;
}
for (rec = (const struct ihex_binrec *)firmware_fw->data;
rec; rec = ihex_next_binrec(rec)) {
if (!INTERNAL_RAM(be32_to_cpu(rec->addr))) {
err = emi26_writememory(dev, be32_to_cpu(rec->addr),
rec->data, be16_to_cpu(rec->len),
ANCHOR_LOAD_EXTERNAL);
if (err < 0) {
err("%s - error loading firmware: error = %d", __func__, err);
goto wraperr;
}
}
}
err = emi26_set_reset(dev,1);
if (err < 0) {
err("%s - error loading firmware: error = %d", __func__, err);
goto wraperr;
}
for (rec = (const struct ihex_binrec *)firmware_fw->data;
rec; rec = ihex_next_binrec(rec)) {
if (INTERNAL_RAM(be32_to_cpu(rec->addr))) {
err = emi26_writememory(dev, be32_to_cpu(rec->addr),
rec->data, be16_to_cpu(rec->len),
ANCHOR_LOAD_INTERNAL);
if (err < 0) {
err("%s - error loading firmware: error = %d", __func__, err);
goto wraperr;
}
}
}
err = emi26_set_reset(dev,0);
if (err < 0) {
err("%s - error loading firmware: error = %d", __func__, err);
goto wraperr;
}
msleep(250);
err = 1;
wraperr:
release_firmware(loader_fw);
release_firmware(bitstream_fw);
release_firmware(firmware_fw);
kfree(buf);
return err;
}
static const struct usb_device_id id_table[] = {
{ USB_DEVICE(EMI26_VENDOR_ID, EMI26_PRODUCT_ID) },
{ USB_DEVICE(EMI26_VENDOR_ID, EMI26B_PRODUCT_ID) },
{ }
};
MODULE_DEVICE_TABLE (usb, id_table);
static int emi26_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
struct usb_device *dev = interface_to_usbdev(intf);
dev_info(&intf->dev, "%s start\n", __func__);
emi26_load_firmware(dev);
return -EIO;
}
static void emi26_disconnect(struct usb_interface *intf)
{
}
static struct usb_driver emi26_driver = {
.name = "emi26 - firmware loader",
.probe = emi26_probe,
.disconnect = emi26_disconnect,
.id_table = id_table,
};
module_usb_driver(emi26_driver);
MODULE_AUTHOR("Tapio Laxström");
MODULE_DESCRIPTION("Emagic EMI 2|6 firmware loader.");
MODULE_LICENSE("GPL");
MODULE_FIRMWARE("emi26/loader.fw");
MODULE_FIRMWARE("emi26/bitstream.fw");
MODULE_FIRMWARE("emi26/firmware.fw");
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