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emi26: use request_firmware()
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Signed-off-by: David Woodhouse <[email protected]>
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@dwmw2
dwmw2 authored and David Woodhouse committed Jul 10, 2008
1 parent 3edbf98 commit ae93a55
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Showing 7 changed files with 5,870 additions and 5,809 deletions.
96 changes: 66 additions & 30 deletions drivers/usb/misc/emi26.c
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Original file line number Diff line number Diff line change
Expand Up @@ -16,18 +16,8 @@
#include <linux/init.h>
#include <linux/usb.h>
#include <linux/delay.h>

#define MAX_INTEL_HEX_RECORD_LENGTH 16
typedef struct _INTEL_HEX_RECORD
{
__u32 length;
__u32 address;
__u32 type;
__u8 data[MAX_INTEL_HEX_RECORD_LENGTH];
} INTEL_HEX_RECORD, *PINTEL_HEX_RECORD;

/* include firmware (variables) */
#include "emi26_fw.h"
#include <linux/firmware.h>
#include <linux/ihex.h>

#define EMI26_VENDOR_ID 0x086a /* Emagic Soft-und Hardware GmBH */
#define EMI26_PRODUCT_ID 0x0100 /* EMI 2|6 without firmware */
Expand All @@ -40,7 +30,9 @@ typedef struct _INTEL_HEX_RECORD
#define CPUCS_REG 0x7F92 /* EZ-USB Control and Status Register. Bit 0 controls 8051 reset */
#define INTERNAL_RAM(address) (address <= MAX_INTERNAL_ADDRESS)

static int emi26_writememory( struct usb_device *dev, int address, unsigned char *data, int length, __u8 bRequest);
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);
Expand All @@ -50,7 +42,9 @@ static void __exit emi26_exit (void);


/* thanks to drivers/usb/serial/keyspan_pda.c code */
static int emi26_writememory (struct usb_device *dev, int address, unsigned char *data, int length, __u8 request)
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);
Expand Down Expand Up @@ -83,9 +77,12 @@ static int emi26_set_reset (struct usb_device *dev, unsigned char reset_bit)

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;
int pos = 0; /* Position in hex record */
__u32 addr; /* Address to write */
__u8 *buf;

Expand All @@ -96,20 +93,41 @@ static int emi26_load_firmware (struct usb_device *dev)
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:
err( "%s - request_firmware() failed", __func__);
goto wraperr;
}

/* Assert reset (stop the CPU in the EMI) */
err = emi26_set_reset(dev,1);
if (err < 0) {
err( "%s - error loading firmware: error = %d", __func__, err);
goto wraperr;
}

rec = (const struct ihex_binrec *)loader_fw->data;
/* 1. We need to put the loader for the FPGA into the EZ-USB */
for (i=0; g_Loader[i].type == 0; i++) {
err = emi26_writememory(dev, g_Loader[i].address, g_Loader[i].data, g_Loader[i].length, ANCHOR_LOAD_INTERNAL);
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);
}

/* De-assert reset (let the CPU run) */
Expand All @@ -123,15 +141,16 @@ static int emi26_load_firmware (struct usb_device *dev)
/* 2. We upload the FPGA firmware into the EMI
* Note: collect up to 1023 (yes!) bytes and send them with
* a single request. This is _much_ faster! */
rec = (const struct ihex_binrec *)bitstream_fw->data;
do {
i = 0;
addr = g_bitstream[pos].address;
addr = be32_to_cpu(rec->addr);

/* intel hex records are terminated with type 0 element */
while ((g_bitstream[pos].type == 0) && (i + g_bitstream[pos].length < FW_LOAD_SIZE)) {
memcpy(buf + i, g_bitstream[pos].data, g_bitstream[pos].length);
i += g_bitstream[pos].length;
pos++;
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) {
Expand All @@ -148,8 +167,11 @@ static int emi26_load_firmware (struct usb_device *dev)
}

/* 3. We need to put the loader for the firmware into the EZ-USB (again...) */
for (i=0; g_Loader[i].type == 0; i++) {
err = emi26_writememory(dev, g_Loader[i].address, g_Loader[i].data, g_Loader[i].length, ANCHOR_LOAD_INTERNAL);
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;
Expand All @@ -165,9 +187,13 @@ static int emi26_load_firmware (struct usb_device *dev)
}

/* 4. We put the part of the firmware that lies in the external RAM into the EZ-USB */
for (i=0; g_Firmware[i].type == 0; i++) {
if (!INTERNAL_RAM(g_Firmware[i].address)) {
err = emi26_writememory(dev, g_Firmware[i].address, g_Firmware[i].data, g_Firmware[i].length, ANCHOR_LOAD_EXTERNAL);

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;
Expand All @@ -182,9 +208,12 @@ static int emi26_load_firmware (struct usb_device *dev)
goto wraperr;
}

for (i=0; g_Firmware[i].type == 0; i++) {
if (INTERNAL_RAM(g_Firmware[i].address)) {
err = emi26_writememory(dev, g_Firmware[i].address, g_Firmware[i].data, g_Firmware[i].length, ANCHOR_LOAD_INTERNAL);
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;
Expand All @@ -205,6 +234,10 @@ static int emi26_load_firmware (struct usb_device *dev)
err = 1;

wraperr:
release_firmware(loader_fw);
release_firmware(bitstream_fw);
release_firmware(firmware_fw);

kfree(buf);
return err;
}
Expand Down Expand Up @@ -257,5 +290,8 @@ 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");
/* vi:ai:syntax=c:sw=8:ts=8:tw=80
*/
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