Rockchip Vendor Storage V1.3.0: Complete Layouts, IDs and U-Boot/Linux/Android APIs

int vendor_storage_init(void)
function: Initialize vendor storage
input : none
return: 0: Initialize success
        other: Initialize fail

int vendor_storage_read(u32 id, void *pbuf, u32 size)
function: read vendor storage by id
input : id, item id;
pbuf, data buffer;
size, number byte to read.
return: other: number byte have read.
        -1: read fail.

int vendor_storage_write(u32 id, void *pbuf, u32 size)
function: write vendor storage by id
input : id: item id;
pbuf: data buffer;
size: number bytes to write.
return:  0: write success
         other: write fail

int rk_vendor_read(u32 id, void *pbuf, u32 size)
function: read vendor storage by id
input : id: item id;
pbuf: data buffer;
size: number bytes to read.
return: other: number byte have read.
        -1: read fail

int rk_vendor_write(u32 id, void *pbuf, u32 size)
function: write vendor storage by id
input : id, item id;
pbuf: data buffer;
size: number bytes to write.
return: 0: write success
        other : write fail

CONFIG_ROCKCHIP_VENDOR_STORAGE:

Say Y here to enable vendor storage support.
Vendor storage is used for stored SN, MAC, BT ADDR etc.

Symbol: ROCKCHIP_VENDOR_STORAGE [=y]
Type  : boolean
Prompt: Rockchip vendor storage support
  Location:
    -> Device Drivers
      -> SOC (System On Chip) specific Drivers
  Defined at drivers/soc/rockchip/Kconfig:6
  Depends on: ARCH_ROCKCHIP [=y] || COMPILE_TEST

/*
 * vendor_storage_init must be call first
 * rerurn:  ret=0 succes   ret<0 failed
 */
 int vendor_storage_init(void);

/*
 * emmc_vendor_write
 * id: item id
 * pbuf: write data
 * size: vendor_item.size
 * rerurn:  ret>0 succes   ret<0 failed
 */
 int emmc_vendor_write(uint32 id, void *pbuf, uint32 size);

 /*
 * emmc_vendor_read
 * id: item id
 * pbuf: read data
 * size: vendor_item.size
 * rerurn:  ret>0 succes   ret<0 failed
 */
 int emmc_vendor_read(uint32 id, void *pbuf, uint32 size);

/*----------------------------------------------------------------------
Name    : RK_ReadProvisioningData
Desc    : Read provisioning data by id
Params  : (IN)nID: id
          (OUT)pDataBuffer: buffer to save data, malloc by caller
          (IN|OUT)nBufferSize: in = size of buffer,out = actual data size
          (IN)dwLayer:device layer
Return  : TRUE: SUCCESSED
          FALSE: FAILED
----------------------------------------------------------------------*/
BOOL RK_ReadProvisioningData(USHORT nID,PBYTE pDataBuffer,USHORT &nBufferSize,DWORD dwLayer=0);

 /*----------------------------------------------------------------------
Name    : RK_WriteProvisioningData
Desc    : Write provisioning data by id
Params  : (IN)nID: id
          (IN)pDataBuffer: buffer to save data, malloc by caller
          (IN)nBufferSize: size of buffer
          (IN)dwLayer:device layer
Return  : TRUE: SUCCESSED
          FALSE: FAILED
----------------------------------------------------------------------*/
BOOL RK_WriteProvisioningData(USHORT nID,PBYTE pDataBuffer,USHORT nBufferSize,DWORD dwLayer=0);

#include <fcntl.h>
#include <sys/ioctl.h>

typedef unsigned short uint16;
typedef unsigned long uint32;
typedef unsigned char uint8;

#define VENDOR_REQ_TAG      0x56524551
#define VENDOR_READ_IO      _IOW('v', 0x01, unsigned int)
#define VENDOR_WRITE_IO     _IOW('v', 0x02, unsigned int)
#define VENDOR_SN_ID        1
#define VENDOR_WIFI_MAC_ID  2
#define VENDOR_LAN_MAC_ID   3
#define VENDOR_BLUETOOTH_ID 4

struct rk_vendor_req {
    u32 tag;
    u16 id;
    u16 len;
    u8 data[1];
};

int vendor_storage_read_test(void)
{
    uint32 i;
    int ret ;
    uint8 p_buf[2048]; /* malloc req buffer or used extern buffer */
    struct rk_vendor_req *req;

    req = (struct rk_vendor_req *)p_buf;
    int sys_fd = open("/dev/vendor_storage",O_RDWR,0);
    if(sys_fd < 0){
        ERROR("vendor_storage open fail\n");
        return -1;
    }

    req->tag = VENDOR_REQ_TAG;
    req->id = VENDOR_SN_ID;
    req->len = 512; /* max read length to read*/

    ret = ioctl(sys_fd, VENDOR_READ_IO, req);
    /* return req->len is the real data length stored in the NV-storage */
    if(ret){
        ERROR("vendor read error\n");
        return -1;
    }

    return 0;
}

int vendor_storage_write_test(void)
{
    uint32 i;
    int ret ;
    uint8 p_buf[2048]; /* malloc req buffer or used extern buffer */
    struct rk_vendor_req *req;

    req = (struct rk_vendor_req *)p_buf;
    int sys_fd = open("/dev/vendor_storage",O_RDWR,0);
    if(sys_fd < 0){
        ERROR("vendor_storage open fail\n");
        return -1;
    }
    req->tag = VENDOR_REQ_TAG;
    req->id = VENDOR_SN_ID;
    req->len = 32; /* data len */
    for (i = 0; i < 32; i++)
        req->data[i] = i;
    ret = ioctl(sys_fd, VENDOR_WRITE_IO, req);
    if(ret){
        ERROR("vendor write error\n");
        return -1;
    }

    return 0;
}