2 * Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved.
4 * This software is licensed under the terms of the GNU General Public
5 * License version 2, as published by the Free Software Foundation, and
6 * may be copied, distributed, and modified under those terms.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
14 #include <linux/module.h>
15 #include <linux/kernel.h>
17 #include <linux/uaccess.h>
19 #include <linux/sched.h>
20 #include <linux/slab.h>
22 #include <linux/mmc/core.h>
23 #include <linux/mmc/card.h>
24 #include <linux/mmc/sdio_func.h>
26 #include <linux/firmware.h>
29 #include "sdio_boot.h"
31 #define TYPE_A_HEADER_SIZE 4
32 #define TYPE_A_LOOKAHEAD_SIZE 16
33 #define YMEM0_SIZE 0x8000 /* 32kbytes */
34 #define DOWNLOAD_SIZE (YMEM0_SIZE - TYPE_A_HEADER_SIZE)
36 #define FW_DIR "gdm72xx/"
37 #define FW_KRN "gdmskrn.bin"
38 #define FW_RFS "gdmsrfs.bin"
42 static int ack_ready(struct sdio_func *func)
44 unsigned long wait = jiffies + HZ;
48 while (time_before(jiffies, wait)) {
49 val = sdio_readb(func, 0x13, &ret);
58 static int download_image(struct sdio_func *func, const char *img_name)
60 int ret = 0, len, pno;
64 const struct firmware *firm;
66 ret = request_firmware(&firm, img_name, &func->dev);
69 "requesting firmware %s failed with error %d\n",
74 buf = kmalloc(DOWNLOAD_SIZE + TYPE_A_HEADER_SIZE, GFP_KERNEL);
87 if (img_len > DOWNLOAD_SIZE) {
91 len = img_len; /* the last packet */
96 buf[1] = (len >> 8) & 0xff;
97 buf[2] = (len >> 16) & 0xff;
99 memcpy(buf+TYPE_A_HEADER_SIZE, firm->data + pos, len);
100 ret = sdio_memcpy_toio(func, 0, buf, len + TYPE_A_HEADER_SIZE);
103 "send image error: packet number = %d ret = %d\n",
108 if (buf[3] == 2) /* The last packet */
110 if (!ack_ready(func)) {
112 dev_err(&func->dev, "Ack is not ready.\n");
115 ret = sdio_memcpy_fromio(func, buf, 0, TYPE_A_LOOKAHEAD_SIZE);
118 "receive ack error: packet number = %d ret = %d\n",
122 sdio_writeb(func, 0x01, 0x13, &ret);
123 sdio_writeb(func, 0x00, 0x10, &ret); /* PCRRT */
125 img_len -= DOWNLOAD_SIZE;
126 pos += DOWNLOAD_SIZE;
135 int sdio_boot(struct sdio_func *func)
138 const char *krn_name = FW_DIR FW_KRN;
139 const char *rfs_name = FW_DIR FW_RFS;
141 tx_buf = kmalloc(YMEM0_SIZE, GFP_KERNEL);
145 ret = download_image(func, krn_name);
148 dev_info(&func->dev, "GCT: Kernel download success.\n");
150 ret = download_image(func, rfs_name);
153 dev_info(&func->dev, "GCT: Filesystem download success.\n");