| /* |
| * 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/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" |
| #include "sdio_boot.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 wait = jiffies + HZ; |
| u8 val; |
| int ret; |
| |
| while (time_before(jiffies, wait)) { |
| 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) |
| 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) |
| 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; |
| } |