159 lines
3.4 KiB
C
159 lines
3.4 KiB
C
/*
|
|
* Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved.
|
|
*
|
|
* This software is licensed under the terms of the GNU General Public
|
|
* License version 2, as published by the Free Software Foundation, and
|
|
* may be copied, distributed, and modified under those terms.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <linux/mmc/core.h>
|
|
#include <linux/mmc/card.h>
|
|
#include <linux/mmc/sdio_func.h>
|
|
|
|
#include <linux/firmware.h>
|
|
|
|
#include "gdm_sdio.h"
|
|
|
|
#define TYPE_A_HEADER_SIZE 4
|
|
#define TYPE_A_LOOKAHEAD_SIZE 16
|
|
#define YMEM0_SIZE 0x8000 /* 32kbytes */
|
|
#define DOWNLOAD_SIZE (YMEM0_SIZE - TYPE_A_HEADER_SIZE)
|
|
|
|
#define FW_DIR "gdm72xx/"
|
|
#define FW_KRN "gdmskrn.bin"
|
|
#define FW_RFS "gdmsrfs.bin"
|
|
|
|
static u8 *tx_buf;
|
|
|
|
static int ack_ready(struct sdio_func *func)
|
|
{
|
|
unsigned long start = jiffies;
|
|
u8 val;
|
|
int ret;
|
|
|
|
while ((jiffies - start) < HZ) {
|
|
val = sdio_readb(func, 0x13, &ret);
|
|
if (val & 0x01)
|
|
return 1;
|
|
schedule();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int download_image(struct sdio_func *func, const char *img_name)
|
|
{
|
|
int ret = 0, len, pno;
|
|
u8 *buf = tx_buf;
|
|
loff_t pos = 0;
|
|
int img_len;
|
|
const struct firmware *firm;
|
|
|
|
ret = request_firmware(&firm, img_name, &func->dev);
|
|
if (ret < 0) {
|
|
dev_err(&func->dev,
|
|
"requesting firmware %s failed with error %d\n",
|
|
img_name, ret);
|
|
return ret;
|
|
}
|
|
|
|
buf = kmalloc(DOWNLOAD_SIZE + TYPE_A_HEADER_SIZE, GFP_KERNEL);
|
|
if (buf == NULL)
|
|
return -ENOMEM;
|
|
|
|
img_len = firm->size;
|
|
|
|
if (img_len <= 0) {
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
pno = 0;
|
|
while (img_len > 0) {
|
|
if (img_len > DOWNLOAD_SIZE) {
|
|
len = DOWNLOAD_SIZE;
|
|
buf[3] = 0;
|
|
} else {
|
|
len = img_len; /* the last packet */
|
|
buf[3] = 2;
|
|
}
|
|
|
|
buf[0] = len & 0xff;
|
|
buf[1] = (len >> 8) & 0xff;
|
|
buf[2] = (len >> 16) & 0xff;
|
|
|
|
memcpy(buf+TYPE_A_HEADER_SIZE, firm->data + pos, len);
|
|
ret = sdio_memcpy_toio(func, 0, buf, len + TYPE_A_HEADER_SIZE);
|
|
if (ret < 0) {
|
|
dev_err(&func->dev,
|
|
"send image error: packet number = %d ret = %d\n",
|
|
pno, ret);
|
|
goto out;
|
|
}
|
|
|
|
if (buf[3] == 2) /* The last packet */
|
|
break;
|
|
if (!ack_ready(func)) {
|
|
ret = -EIO;
|
|
dev_err(&func->dev, "Ack is not ready.\n");
|
|
goto out;
|
|
}
|
|
ret = sdio_memcpy_fromio(func, buf, 0, TYPE_A_LOOKAHEAD_SIZE);
|
|
if (ret < 0) {
|
|
dev_err(&func->dev,
|
|
"receive ack error: packet number = %d ret = %d\n",
|
|
pno, ret);
|
|
goto out;
|
|
}
|
|
sdio_writeb(func, 0x01, 0x13, &ret);
|
|
sdio_writeb(func, 0x00, 0x10, &ret); /* PCRRT */
|
|
|
|
img_len -= DOWNLOAD_SIZE;
|
|
pos += DOWNLOAD_SIZE;
|
|
pno++;
|
|
}
|
|
|
|
out:
|
|
kfree(buf);
|
|
return ret;
|
|
}
|
|
|
|
int sdio_boot(struct sdio_func *func)
|
|
{
|
|
int ret;
|
|
const char *krn_name = FW_DIR FW_KRN;
|
|
const char *rfs_name = FW_DIR FW_RFS;
|
|
|
|
tx_buf = kmalloc(YMEM0_SIZE, GFP_KERNEL);
|
|
if (tx_buf == NULL)
|
|
return -ENOMEM;
|
|
|
|
ret = download_image(func, krn_name);
|
|
if (ret)
|
|
goto restore_fs;
|
|
dev_info(&func->dev, "GCT: Kernel download success.\n");
|
|
|
|
ret = download_image(func, rfs_name);
|
|
if (ret)
|
|
goto restore_fs;
|
|
dev_info(&func->dev, "GCT: Filesystem download success.\n");
|
|
|
|
restore_fs:
|
|
kfree(tx_buf);
|
|
return ret;
|
|
}
|