--- /dev/null
+/*
+ * Copyright (c) 2016, Fuzhou Rockchip Electronics Co., Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ */
+
+#include <linux/miscdevice.h>
+#include <linux/platform_device.h>
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/mm.h>
+#include <linux/list.h>
+#include <linux/debugfs.h>
+#include <linux/mempolicy.h>
+#include <linux/sched.h>
+#include <linux/dma-mapping.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
+#include <linux/module.h>
+#include <linux/soc/rockchip/rk_vendor_storage.h>
+#include <linux/kthread.h>
+#include <linux/delay.h>
+
+#define EMMC_IDB_PART_OFFSET 64
+#define EMMC_SYS_PART_OFFSET 8064
+#define EMMC_BOOT_PART_SIZE 1024
+#define EMMC_VENDOR_PART_START (1024 * 7)
+#define EMMC_VENDOR_PART_SIZE 128
+#define EMMC_VENDOR_PART_NUM 4
+#define EMMC_VENDOR_TAG 0x524B5644
+
+struct rk_sys_req {
+ u32 tag;
+ u32 len;
+ u8 data[512];
+};
+
+struct rk_vendor_req {
+ u32 tag;
+ u16 id;
+ u16 len;
+ u8 data[1024];
+};
+
+struct vendor_item {
+ u16 id;
+ u16 offset;
+ u16 size;
+ u16 flag;
+};
+
+struct vendor_info {
+ u32 tag;
+ u32 version;
+ u16 next_index;
+ u16 item_num;
+ u16 free_offset;
+ u16 free_size;
+ struct vendor_item item[126]; /* 126 * 8*/
+ u8 data[EMMC_VENDOR_PART_SIZE * 512 - 1024 - 8];
+ u32 hash;
+ u32 version2;
+};
+
+#define READ_SECTOR_IO _IOW('r', 0x04, unsigned int)
+#define WRITE_SECTOR_IO _IOW('r', 0x05, unsigned int)
+#define END_WRITE_SECTOR_IO _IOW('r', 0x52, unsigned int)
+#define GET_FLASH_INFO_IO _IOW('r', 0x1A, unsigned int)
+#define GET_BAD_BLOCK_IO _IOW('r', 0x03, unsigned int)
+#define GET_LOCK_FLAG_IO _IOW('r', 0x53, unsigned int)
+
+#define VENDOR_REQ_TAG 0x56524551
+#define VENDOR_READ_IO _IOW('v', 0x01, unsigned int)
+#define VENDOR_WRITE_IO _IOW('v', 0x02, unsigned int)
+
+static u8 *g_idb_buffer;
+static struct vendor_info *g_vendor;
+
+extern int rk_emmc_transfer(u8 *buffer, unsigned addr, unsigned blksz,
+ int write);
+
+static int emmc_vendor_ops(u8 *buffer, u32 addr, u32 n_sec, int write)
+{
+ u32 i, ret;
+
+ for (i = 0; i < n_sec; i++)
+ ret = rk_emmc_transfer(buffer + i * 512, addr + i, 512, write);
+
+ return ret;
+}
+
+static int emmc_vendor_storage_init(void)
+{
+ u32 i, max_ver, max_index;
+ u8 *p_buf;
+
+ g_vendor = kmalloc(sizeof(*g_vendor), GFP_KERNEL | GFP_DMA);
+ if (!g_vendor)
+ return -1;
+
+ max_ver = 0;
+ max_index = 0;
+ for (i = 0; i < EMMC_VENDOR_PART_NUM; i++) {
+ /* read first 512 bytes */
+ p_buf = (u8 *)g_vendor;
+ if (rk_emmc_transfer(p_buf, EMMC_VENDOR_PART_START +
+ EMMC_VENDOR_PART_SIZE * i, 512, 0))
+ goto error_exit;
+ /* read last 512 bytes */
+ p_buf += (EMMC_VENDOR_PART_SIZE - 1) * 512;
+ if (rk_emmc_transfer(p_buf, EMMC_VENDOR_PART_START +
+ EMMC_VENDOR_PART_SIZE * (i + 1) - 1,
+ 512, 0))
+ goto error_exit;
+
+ if (g_vendor->tag == EMMC_VENDOR_TAG &&
+ g_vendor->version2 == g_vendor->version) {
+ if (max_ver < g_vendor->version) {
+ max_index = i;
+ max_ver = g_vendor->version;
+ }
+ }
+ }
+ if (max_ver) {
+ if (emmc_vendor_ops((u8 *)g_vendor, EMMC_VENDOR_PART_START +
+ EMMC_VENDOR_PART_SIZE * max_index,
+ EMMC_VENDOR_PART_SIZE, 0))
+ goto error_exit;
+ } else {
+ memset((void *)g_vendor, 0, sizeof(g_vendor));
+ g_vendor->version = 1;
+ g_vendor->tag = EMMC_VENDOR_TAG;
+ g_vendor->version2 = g_vendor->version;
+ g_vendor->free_offset = 0;
+ g_vendor->free_size = sizeof(g_vendor->data);
+ }
+ return 0;
+error_exit:
+ kfree(g_vendor);
+ g_vendor = NULL;
+ return -1;
+}
+
+static int emmc_vendor_read(u32 id, void *pbuf, u32 size)
+{
+ u32 i;
+
+ if (!g_vendor)
+ return -1;
+
+ for (i = 0; i < g_vendor->item_num; i++) {
+ if (g_vendor->item[i].id == id) {
+ if (size > g_vendor->item[i].size)
+ size = g_vendor->item[i].size;
+ memcpy(pbuf,
+ &g_vendor->data[g_vendor->item[i].offset],
+ size);
+ return size;
+ }
+ }
+ return (-1);
+}
+
+static int emmc_vendor_write(u32 id, void *pbuf, u32 size)
+{
+ u32 i, next_index, algin_size;
+ struct vendor_item *item;
+
+ if (!g_vendor)
+ return -1;
+
+ algin_size = (size + 0x3F) & (~0x3F); /* algin to 32 bytes*/
+ next_index = g_vendor->next_index;
+ for (i = 0; i < g_vendor->item_num; i++) {
+ if (g_vendor->item[i].id == id) {
+ if (size > algin_size)
+ return -1;
+ memcpy(&g_vendor->data[g_vendor->item[i].offset],
+ pbuf,
+ size);
+ g_vendor->item[i].size = size;
+ g_vendor->version++;
+ g_vendor->version2 = g_vendor->version;
+ g_vendor->next_index++;
+ if (g_vendor->next_index >= EMMC_VENDOR_PART_NUM)
+ g_vendor->next_index = 0;
+ emmc_vendor_ops((u8 *)g_vendor, EMMC_VENDOR_PART_START +
+ EMMC_VENDOR_PART_SIZE * next_index,
+ EMMC_VENDOR_PART_SIZE, 1);
+ return 0;
+ }
+ }
+
+ if (g_vendor->free_size >= algin_size) {
+ item = &g_vendor->item[g_vendor->item_num];
+ item->id = id;
+ item->offset = g_vendor->free_offset;
+ item->size = size;
+ g_vendor->free_offset += algin_size;
+ g_vendor->free_size -= algin_size;
+ memcpy(&g_vendor->data[item->offset], pbuf, size);
+ g_vendor->item_num++;
+ g_vendor->version++;
+ g_vendor->version2 = g_vendor->version;
+ g_vendor->next_index++;
+ if (g_vendor->next_index >= EMMC_VENDOR_PART_NUM)
+ g_vendor->next_index = 0;
+ emmc_vendor_ops((u8 *)g_vendor, EMMC_VENDOR_PART_START +
+ EMMC_VENDOR_PART_SIZE * next_index,
+ EMMC_VENDOR_PART_SIZE, 1);
+ return 0;
+ }
+ return(-1);
+}
+
+static int id_blk_read_data(u32 index, u32 n_sec, u8 *buf)
+{
+ u32 i;
+ u32 ret = 0;
+
+ if (index + n_sec >= 1024 * 5)
+ return 0;
+ index = index + EMMC_IDB_PART_OFFSET;
+ for (i = 0; i < n_sec; i++) {
+ ret = rk_emmc_transfer(buf + i * 512, index + i, 512, 0);
+ if (ret)
+ return ret;
+ }
+ return ret;
+}
+
+static int id_blk_write_data(u32 index, u32 n_sec, u8 *buf)
+{
+ u32 i;
+ u32 ret = 0;
+
+ if (index + n_sec >= 1024 * 5)
+ return 0;
+ index = index + EMMC_IDB_PART_OFFSET;
+ for (i = 0; i < n_sec; i++) {
+ ret = rk_emmc_transfer(buf + i * 512, index + i, 512, 1);
+ if (ret)
+ return ret;
+ }
+ return ret;
+}
+
+static int emmc_write_idblock(u32 size, u8 *buf, u32 *id_blk_tbl)
+{
+ u32 i, totle_sec, j;
+ u32 totle_write_count = 0;
+ u32 *p_raw_data = (u32 *)buf;
+ u32 *p_check_buf = kmalloc(EMMC_BOOT_PART_SIZE * 512, GFP_KERNEL);
+
+ if (!p_check_buf)
+ return -1;
+
+ totle_sec = (size + 511) >> 9;
+ if (totle_sec <= 8)
+ totle_sec = 8;
+
+ for (i = 0; i < 5; i++) {
+ memset(p_check_buf, 0, 512);
+ id_blk_write_data(EMMC_BOOT_PART_SIZE * i, 1,
+ (u8 *)p_check_buf);
+ id_blk_write_data(EMMC_BOOT_PART_SIZE * i + 1,
+ totle_sec - 1, buf + 512);
+ id_blk_write_data(EMMC_BOOT_PART_SIZE * i, 1, buf);
+ id_blk_read_data(EMMC_BOOT_PART_SIZE * i, totle_sec,
+ (u8 *)p_check_buf);
+ for (j = 0; j < totle_sec * 128; j++) {
+ if (p_check_buf[j] != p_raw_data[j]) {
+ memset(p_check_buf, 0, 512);
+ id_blk_write_data(EMMC_BOOT_PART_SIZE * i, 1,
+ (u8 *)p_check_buf);
+ break;
+ }
+ }
+ if (j >= totle_sec * 128)
+ totle_write_count++;
+ }
+ kfree(p_check_buf);
+ if (totle_write_count)
+ return 0;
+ return (-1);
+}
+
+static int vendor_storage_open(struct inode *inode, struct file *file)
+{
+ return 0;
+}
+
+static int vendor_storage_release(struct inode *inode, struct file *file)
+{
+ return 0;
+}
+
+static const u32 g_crc32_tbl[256] = {
+ 0x00000000, 0x04c10db7, 0x09821b6e, 0x0d4316d9,
+ 0x130436dc, 0x17c53b6b, 0x1a862db2, 0x1e472005,
+ 0x26086db8, 0x22c9600f, 0x2f8a76d6, 0x2b4b7b61,
+ 0x350c5b64, 0x31cd56d3, 0x3c8e400a, 0x384f4dbd,
+ 0x4c10db70, 0x48d1d6c7, 0x4592c01e, 0x4153cda9,
+ 0x5f14edac, 0x5bd5e01b, 0x5696f6c2, 0x5257fb75,
+ 0x6a18b6c8, 0x6ed9bb7f, 0x639aada6, 0x675ba011,
+ 0x791c8014, 0x7ddd8da3, 0x709e9b7a, 0x745f96cd,
+ 0x9821b6e0, 0x9ce0bb57, 0x91a3ad8e, 0x9562a039,
+ 0x8b25803c, 0x8fe48d8b, 0x82a79b52, 0x866696e5,
+ 0xbe29db58, 0xbae8d6ef, 0xb7abc036, 0xb36acd81,
+ 0xad2ded84, 0xa9ece033, 0xa4aff6ea, 0xa06efb5d,
+ 0xd4316d90, 0xd0f06027, 0xddb376fe, 0xd9727b49,
+ 0xc7355b4c, 0xc3f456fb, 0xceb74022, 0xca764d95,
+ 0xf2390028, 0xf6f80d9f, 0xfbbb1b46, 0xff7a16f1,
+ 0xe13d36f4, 0xe5fc3b43, 0xe8bf2d9a, 0xec7e202d,
+ 0x34826077, 0x30436dc0, 0x3d007b19, 0x39c176ae,
+ 0x278656ab, 0x23475b1c, 0x2e044dc5, 0x2ac54072,
+ 0x128a0dcf, 0x164b0078, 0x1b0816a1, 0x1fc91b16,
+ 0x018e3b13, 0x054f36a4, 0x080c207d, 0x0ccd2dca,
+ 0x7892bb07, 0x7c53b6b0, 0x7110a069, 0x75d1adde,
+ 0x6b968ddb, 0x6f57806c, 0x621496b5, 0x66d59b02,
+ 0x5e9ad6bf, 0x5a5bdb08, 0x5718cdd1, 0x53d9c066,
+ 0x4d9ee063, 0x495fedd4, 0x441cfb0d, 0x40ddf6ba,
+ 0xaca3d697, 0xa862db20, 0xa521cdf9, 0xa1e0c04e,
+ 0xbfa7e04b, 0xbb66edfc, 0xb625fb25, 0xb2e4f692,
+ 0x8aabbb2f, 0x8e6ab698, 0x8329a041, 0x87e8adf6,
+ 0x99af8df3, 0x9d6e8044, 0x902d969d, 0x94ec9b2a,
+ 0xe0b30de7, 0xe4720050, 0xe9311689, 0xedf01b3e,
+ 0xf3b73b3b, 0xf776368c, 0xfa352055, 0xfef42de2,
+ 0xc6bb605f, 0xc27a6de8, 0xcf397b31, 0xcbf87686,
+ 0xd5bf5683, 0xd17e5b34, 0xdc3d4ded, 0xd8fc405a,
+ 0x6904c0ee, 0x6dc5cd59, 0x6086db80, 0x6447d637,
+ 0x7a00f632, 0x7ec1fb85, 0x7382ed5c, 0x7743e0eb,
+ 0x4f0cad56, 0x4bcda0e1, 0x468eb638, 0x424fbb8f,
+ 0x5c089b8a, 0x58c9963d, 0x558a80e4, 0x514b8d53,
+ 0x25141b9e, 0x21d51629, 0x2c9600f0, 0x28570d47,
+ 0x36102d42, 0x32d120f5, 0x3f92362c, 0x3b533b9b,
+ 0x031c7626, 0x07dd7b91, 0x0a9e6d48, 0x0e5f60ff,
+ 0x101840fa, 0x14d94d4d, 0x199a5b94, 0x1d5b5623,
+ 0xf125760e, 0xf5e47bb9, 0xf8a76d60, 0xfc6660d7,
+ 0xe22140d2, 0xe6e04d65, 0xeba35bbc, 0xef62560b,
+ 0xd72d1bb6, 0xd3ec1601, 0xdeaf00d8, 0xda6e0d6f,
+ 0xc4292d6a, 0xc0e820dd, 0xcdab3604, 0xc96a3bb3,
+ 0xbd35ad7e, 0xb9f4a0c9, 0xb4b7b610, 0xb076bba7,
+ 0xae319ba2, 0xaaf09615, 0xa7b380cc, 0xa3728d7b,
+ 0x9b3dc0c6, 0x9ffccd71, 0x92bfdba8, 0x967ed61f,
+ 0x8839f61a, 0x8cf8fbad, 0x81bbed74, 0x857ae0c3,
+ 0x5d86a099, 0x5947ad2e, 0x5404bbf7, 0x50c5b640,
+ 0x4e829645, 0x4a439bf2, 0x47008d2b, 0x43c1809c,
+ 0x7b8ecd21, 0x7f4fc096, 0x720cd64f, 0x76cddbf8,
+ 0x688afbfd, 0x6c4bf64a, 0x6108e093, 0x65c9ed24,
+ 0x11967be9, 0x1557765e, 0x18146087, 0x1cd56d30,
+ 0x02924d35, 0x06534082, 0x0b10565b, 0x0fd15bec,
+ 0x379e1651, 0x335f1be6, 0x3e1c0d3f, 0x3add0088,
+ 0x249a208d, 0x205b2d3a, 0x2d183be3, 0x29d93654,
+ 0xc5a71679, 0xc1661bce, 0xcc250d17, 0xc8e400a0,
+ 0xd6a320a5, 0xd2622d12, 0xdf213bcb, 0xdbe0367c,
+ 0xe3af7bc1, 0xe76e7676, 0xea2d60af, 0xeeec6d18,
+ 0xf0ab4d1d, 0xf46a40aa, 0xf9295673, 0xfde85bc4,
+ 0x89b7cd09, 0x8d76c0be, 0x8035d667, 0x84f4dbd0,
+ 0x9ab3fbd5, 0x9e72f662, 0x9331e0bb, 0x97f0ed0c,
+ 0xafbfa0b1, 0xab7ead06, 0xa63dbbdf, 0xa2fcb668,
+ 0xbcbb966d, 0xb87a9bda, 0xb5398d03, 0xb1f880b4,
+};
+
+static u32 rk_crc_32(unsigned char *buf, u32 len)
+{
+ u32 i;
+ u32 crc = 0;
+
+ for (i = 0; i < len; i++)
+ crc = (crc << 8) ^ g_crc32_tbl[(crc >> 24) ^ *buf++];
+ return crc;
+}
+
+static long vendor_storage_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ long ret = -1;
+ u32 size;
+ struct rk_sys_req *s_req;
+ struct rk_vendor_req *v_req;
+ u32 *page_buf;
+
+ page_buf = kmalloc(4096, GFP_KERNEL);
+ if (!page_buf)
+ return ret;
+
+ v_req = (struct rk_vendor_req *)page_buf;
+ s_req = (struct rk_sys_req *)page_buf;
+
+ switch (cmd) {
+ case VENDOR_READ_IO:
+ {
+ if (copy_from_user(page_buf, (void __user *)arg, 8)) {
+ ret = -EFAULT;
+ break;
+ }
+ if (v_req->tag == VENDOR_REQ_TAG) {
+ size = emmc_vendor_read(v_req->id, v_req->data,
+ v_req->len);
+ if (size != -1) {
+ v_req->len = size;
+ ret = 0;
+ if (copy_to_user((void __user *)arg,
+ page_buf,
+ v_req->len + 8))
+ ret = -EFAULT;
+ }
+ }
+ } break;
+ case VENDOR_WRITE_IO:
+ {
+ if (copy_from_user(page_buf, (void __user *)arg, 8)) {
+ ret = -EFAULT;
+ break;
+ }
+ if (v_req->tag == VENDOR_REQ_TAG && (v_req->len < 4096 - 8)) {
+ if (copy_from_user(page_buf, (void __user *)arg,
+ v_req->len + 8)) {
+ ret = -EFAULT;
+ break;
+ }
+ ret = emmc_vendor_write(v_req->id,
+ v_req->data,
+ v_req->len);
+ }
+ } break;
+
+ case READ_SECTOR_IO:
+ {
+ if (copy_from_user(page_buf, (void __user *)arg, 512)) {
+ ret = -EFAULT;
+ goto exit;
+ }
+
+ size = page_buf[1];
+ if (size <= 8) {
+ id_blk_read_data(page_buf[0], size, (u8 *)page_buf);
+ if (copy_to_user((void __user *)arg, page_buf,
+ size * 512)) {
+ ret = -EFAULT;
+ goto exit;
+ }
+ } else {
+ return -EFAULT;
+ }
+ ret = 0;
+ } break;
+
+ case WRITE_SECTOR_IO:
+ {
+ if (copy_from_user(page_buf, (void __user *)arg, 4096)) {
+ ret = -EFAULT;
+ goto exit;
+ }
+ if (!g_idb_buffer) {
+ g_idb_buffer = kmalloc(4096 + EMMC_BOOT_PART_SIZE * 512,
+ GFP_KERNEL);
+ if (!g_idb_buffer) {
+ ret = -EFAULT;
+ goto exit;
+ }
+ }
+ if (page_buf[1] <= 4088 && page_buf[0] <=
+ (EMMC_BOOT_PART_SIZE * 512 - 4096)) {
+ memcpy(g_idb_buffer + page_buf[0], page_buf + 2,
+ page_buf[1]);
+ } else {
+ ret = -EFAULT;
+ goto exit;
+ }
+ ret = 0;
+ } break;
+
+ case END_WRITE_SECTOR_IO:
+ {
+ if (copy_from_user(page_buf, (void __user *)arg, 28)) {
+ ret = -EFAULT;
+ goto exit;
+ }
+ if (page_buf[0] <= (EMMC_BOOT_PART_SIZE * 512)) {
+ if (!g_idb_buffer) {
+ ret = -EFAULT;
+ goto exit;
+ }
+ if (page_buf[1] !=
+ rk_crc_32(g_idb_buffer, page_buf[0])) {
+ ret = -2;
+ goto exit;
+ }
+ ret = emmc_write_idblock(page_buf[0],
+ (u8 *)g_idb_buffer,
+ &page_buf[2]);
+ kfree(g_idb_buffer);
+ g_idb_buffer = NULL;
+ } else {
+ ret = -EFAULT;
+ goto exit;
+ }
+ ret = 0;
+ } break;
+
+ case GET_BAD_BLOCK_IO:
+ {
+ memset(page_buf, 0, 64);
+ if (copy_to_user((void __user *)arg, page_buf, 64)) {
+ ret = -EFAULT;
+ goto exit;
+ }
+ ret = 0;
+ } break;
+
+ case GET_LOCK_FLAG_IO:
+ {
+ page_buf[0] = 0;
+ if (copy_to_user((void __user *)arg, page_buf, 4)) {
+ ret = -EFAULT;
+ goto exit;
+ }
+ ret = 0;
+ } break;
+
+ case GET_FLASH_INFO_IO:
+ {
+ page_buf[0] = 0x00800000;
+ page_buf[1] = 0x00040400;
+ page_buf[2] = 0x00010028;
+ if (copy_to_user((void __user *)arg, page_buf, 11)) {
+ ret = -EFAULT;
+ goto exit;
+ }
+ ret = 0;
+ } break;
+
+ default:
+ ret = -EFAULT;
+ goto exit;
+ }
+exit:
+ pr_info("ret = %lx\n", ret);
+ kfree(page_buf);
+ return ret;
+}
+
+const struct file_operations vendor_storage_fops = {
+ .open = vendor_storage_open,
+ .compat_ioctl = vendor_storage_ioctl,
+ .unlocked_ioctl = vendor_storage_ioctl,
+ .release = vendor_storage_release,
+};
+
+static struct miscdevice vender_storage_dev = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "vendor_storage",
+ .fops = &vendor_storage_fops,
+};
+
+static int vendor_init_thread(void *arg)
+{
+ int ret;
+
+ /* sleep 500ms wait emmc initialize completed */
+ msleep(500);
+ ret = emmc_vendor_storage_init();
+ if (!ret) {
+ ret = misc_register(&vender_storage_dev);
+ rk_vendor_register(emmc_vendor_read, emmc_vendor_write);
+ }
+ pr_info("vendor storage:20160801 ret = %d\n", ret);
+ return ret;
+}
+
+static int __init vendor_storage_init(void)
+{
+ g_idb_buffer = NULL;
+ kthread_run(vendor_init_thread, (void *)NULL, "vendor_storage_init");
+ return 0;
+}
+
+static __exit void vendor_storage_deinit(void)
+{
+ if (g_vendor)
+ misc_deregister(&vender_storage_dev);
+}
+
+device_initcall_sync(vendor_storage_init);
+module_exit(vendor_storage_deinit);
projects / firefly-linux-kernel-4.4.55.git / commitdiff