kernel/include/linux/mtd/pfow.h

   1 /* Primary function overlay window definitions
   2  * and service functions used by LPDDR chips
   3  */
   4 #ifndef __LINUX_MTD_PFOW_H
   5 #define __LINUX_MTD_PFOW_H
   6
   7 #include <linux/mtd/qinfo.h>
   8
   9 /* PFOW registers addressing */
  10 /* Address of symbol "P" */
  11 #define PFOW_QUERY_STRING_P                     0x0000
  12 /* Address of symbol "F" */
  13 #define PFOW_QUERY_STRING_F                     0x0002
  14 /* Address of symbol "O" */
  15 #define PFOW_QUERY_STRING_O                     0x0004
  16 /* Address of symbol "W" */
  17 #define PFOW_QUERY_STRING_W                     0x0006
  18 /* Identification info for LPDDR chip */
  19 #define PFOW_MANUFACTURER_ID                    0x0020
  20 #define PFOW_DEVICE_ID                          0x0022
  21 /* Address in PFOW where prog buffer can can be found */
  22 #define PFOW_PROGRAM_BUFFER_OFFSET              0x0040
  23 /* Size of program buffer in words */
  24 #define PFOW_PROGRAM_BUFFER_SIZE                0x0042
  25 /* Address command code register */
  26 #define PFOW_COMMAND_CODE                       0x0080
  27 /* command data register */
  28 #define PFOW_COMMAND_DATA                       0x0084
  29 /* command address register lower address bits */
  30 #define PFOW_COMMAND_ADDRESS_L                  0x0088
  31 /* command address register upper address bits */
  32 #define PFOW_COMMAND_ADDRESS_H                  0x008a
  33 /* number of bytes to be proggrammed lower address bits */
  34 #define PFOW_DATA_COUNT_L                       0x0090
  35 /* number of bytes to be proggrammed higher address bits */
  36 #define PFOW_DATA_COUNT_H                       0x0092
  37 /* command execution register, the only possible value is 0x01 */
  38 #define PFOW_COMMAND_EXECUTE                    0x00c0
  39 /* 0x01 should be written at this address to clear buffer */
  40 #define PFOW_CLEAR_PROGRAM_BUFFER               0x00c4
  41 /* device program/erase suspend register */
  42 #define PFOW_PROGRAM_ERASE_SUSPEND              0x00c8
  43 /* device status register */
  44 #define PFOW_DSR                                0x00cc
  45
  46 /* LPDDR memory device command codes */
  47 /* They are possible values of PFOW command code register */
  48 #define LPDDR_WORD_PROGRAM              0x0041
  49 #define LPDDR_BUFF_PROGRAM              0x00E9
  50 #define LPDDR_BLOCK_ERASE               0x0020
  51 #define LPDDR_LOCK_BLOCK                0x0061
  52 #define LPDDR_UNLOCK_BLOCK              0x0062
  53 #define LPDDR_READ_BLOCK_LOCK_STATUS    0x0065
  54 #define LPDDR_INFO_QUERY                0x0098
  55 #define LPDDR_READ_OTP                  0x0097
  56 #define LPDDR_PROG_OTP                  0x00C0
  57 #define LPDDR_RESUME                    0x00D0
  58
  59 /* Defines possible value of PFOW command execution register */
  60 #define LPDDR_START_EXECUTION                   0x0001
  61
  62 /* Defines possible value of PFOW program/erase suspend register */
  63 #define LPDDR_SUSPEND                           0x0001
  64
  65 /* Possible values of PFOW device status register */
  66 /* access R - read; RC read & clearable */
  67 #define DSR_DPS                 (1<<1) /* RC; device protect status
  68                                         * 0 - not protected 1 - locked */
  69 #define DSR_PSS                 (1<<2) /* R; program suspend status;
  70                                         * 0-prog in progress/completed,
  71                                         * 1- prog suspended */
  72 #define DSR_VPPS                (1<<3) /* RC; 0-Vpp OK, * 1-Vpp low */
  73 #define DSR_PROGRAM_STATUS      (1<<4) /* RC; 0-successful, 1-error */
  74 #define DSR_ERASE_STATUS        (1<<5) /* RC; erase or blank check status;
  75                                         * 0-success erase/blank check,
  76                                         * 1 blank check error */
  77 #define DSR_ESS                 (1<<6) /* R; erase suspend status;
  78                                         * 0-erase in progress/complete,
  79                                         * 1 erase suspended */
  80 #define DSR_READY_STATUS        (1<<7) /* R; Device status
  81                                         * 0-busy,
  82                                         * 1-ready */
  83 #define DSR_RPS                 (0x3<<8) /* RC;  region program status
  84                                         * 00 - Success,
  85                                         * 01-re-program attempt in region with
  86                                         * object mode data,
  87                                         * 10-object mode program w attempt in
  88                                         * region with control mode data
  89                                         * 11-attempt to program invalid half
  90                                         * with 0x41 command */
  91 #define DSR_AOS                 (1<<12) /* RC; 1- AO related failure */
  92 #define DSR_AVAILABLE           (1<<15) /* R; Device availbility
  93                                         * 1 - Device available
  94                                         * 0 - not available */
  95
  96 /* The superset of all possible error bits in DSR */
  97 #define DSR_ERR                 0x133A
  98
  99 static inline void send_pfow_command(struct map_info *map,
 100                                 unsigned long cmd_code, unsigned long adr,
 101                                 unsigned long len, map_word *datum)
 102 {
 103         int bits_per_chip = map_bankwidth(map) * 8;
 104
 105         map_write(map, CMD(cmd_code), map->pfow_base + PFOW_COMMAND_CODE);
 106         map_write(map, CMD(adr & ((1<<bits_per_chip) - 1)),
 107                                 map->pfow_base + PFOW_COMMAND_ADDRESS_L);
 108         map_write(map, CMD(adr>>bits_per_chip),
 109                                 map->pfow_base + PFOW_COMMAND_ADDRESS_H);
 110         if (len) {
 111                 map_write(map, CMD(len & ((1<<bits_per_chip) - 1)),
 112                                         map->pfow_base + PFOW_DATA_COUNT_L);
 113                 map_write(map, CMD(len>>bits_per_chip),
 114                                         map->pfow_base + PFOW_DATA_COUNT_H);
 115         }
 116         if (datum)
 117                 map_write(map, *datum, map->pfow_base + PFOW_COMMAND_DATA);
 118
 119         /* Command execution start */
 120         map_write(map, CMD(LPDDR_START_EXECUTION),
 121                         map->pfow_base + PFOW_COMMAND_EXECUTE);
 122 }
 123
 124 static inline void print_drs_error(unsigned dsr)
 125 {
 126         int prog_status = (dsr & DSR_RPS) >> 8;
 127
 128         if (!(dsr & DSR_AVAILABLE))
 129                 printk(KERN_NOTICE"DSR.15: (0) Device not Available\n");
 130         if (prog_status & 0x03)
 131                 printk(KERN_NOTICE"DSR.9,8: (11) Attempt to program invalid "
 132                                                 "half with 41h command\n");
 133         else if (prog_status & 0x02)
 134                 printk(KERN_NOTICE"DSR.9,8: (10) Object Mode Program attempt "
 135                                         "in region with Control Mode data\n");
 136         else if (prog_status &  0x01)
 137                 printk(KERN_NOTICE"DSR.9,8: (01) Program attempt in region "
 138                                                 "with Object Mode data\n");
 139         if (!(dsr & DSR_READY_STATUS))
 140                 printk(KERN_NOTICE"DSR.7: (0) Device is Busy\n");
 141         if (dsr & DSR_ESS)
 142                 printk(KERN_NOTICE"DSR.6: (1) Erase Suspended\n");
 143         if (dsr & DSR_ERASE_STATUS)
 144                 printk(KERN_NOTICE"DSR.5: (1) Erase/Blank check error\n");
 145         if (dsr & DSR_PROGRAM_STATUS)
 146                 printk(KERN_NOTICE"DSR.4: (1) Program Error\n");
 147         if (dsr & DSR_VPPS)
 148                 printk(KERN_NOTICE"DSR.3: (1) Vpp low detect, operation "
 149                                         "aborted\n");
 150         if (dsr & DSR_PSS)
 151                 printk(KERN_NOTICE"DSR.2: (1) Program suspended\n");
 152         if (dsr & DSR_DPS)
 153                 printk(KERN_NOTICE"DSR.1: (1) Aborted Erase/Program attempt "
 154                                         "on locked block\n");
 155 }
 156 #endif /* __LINUX_MTD_PFOW_H */