125 lines
4.4 KiB
C
125 lines
4.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Primary function overlay window definitions
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* and service functions used by LPDDR chips
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*/
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#ifndef __LINUX_MTD_PFOW_H
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#define __LINUX_MTD_PFOW_H
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#include <linux/mtd/qinfo.h>
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/* PFOW registers addressing */
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/* Address of symbol "P" */
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#define PFOW_QUERY_STRING_P 0x0000
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/* Address of symbol "F" */
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#define PFOW_QUERY_STRING_F 0x0002
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/* Address of symbol "O" */
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#define PFOW_QUERY_STRING_O 0x0004
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/* Address of symbol "W" */
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#define PFOW_QUERY_STRING_W 0x0006
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/* Identification info for LPDDR chip */
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#define PFOW_MANUFACTURER_ID 0x0020
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#define PFOW_DEVICE_ID 0x0022
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/* Address in PFOW where prog buffer can be found */
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#define PFOW_PROGRAM_BUFFER_OFFSET 0x0040
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/* Size of program buffer in words */
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#define PFOW_PROGRAM_BUFFER_SIZE 0x0042
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/* Address command code register */
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#define PFOW_COMMAND_CODE 0x0080
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/* command data register */
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#define PFOW_COMMAND_DATA 0x0084
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/* command address register lower address bits */
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#define PFOW_COMMAND_ADDRESS_L 0x0088
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/* command address register upper address bits */
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#define PFOW_COMMAND_ADDRESS_H 0x008a
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/* number of bytes to be proggrammed lower address bits */
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#define PFOW_DATA_COUNT_L 0x0090
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/* number of bytes to be proggrammed higher address bits */
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#define PFOW_DATA_COUNT_H 0x0092
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/* command execution register, the only possible value is 0x01 */
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#define PFOW_COMMAND_EXECUTE 0x00c0
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/* 0x01 should be written at this address to clear buffer */
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#define PFOW_CLEAR_PROGRAM_BUFFER 0x00c4
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/* device program/erase suspend register */
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#define PFOW_PROGRAM_ERASE_SUSPEND 0x00c8
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/* device status register */
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#define PFOW_DSR 0x00cc
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/* LPDDR memory device command codes */
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/* They are possible values of PFOW command code register */
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#define LPDDR_WORD_PROGRAM 0x0041
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#define LPDDR_BUFF_PROGRAM 0x00E9
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#define LPDDR_BLOCK_ERASE 0x0020
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#define LPDDR_LOCK_BLOCK 0x0061
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#define LPDDR_UNLOCK_BLOCK 0x0062
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#define LPDDR_READ_BLOCK_LOCK_STATUS 0x0065
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#define LPDDR_INFO_QUERY 0x0098
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#define LPDDR_READ_OTP 0x0097
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#define LPDDR_PROG_OTP 0x00C0
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#define LPDDR_RESUME 0x00D0
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/* Defines possible value of PFOW command execution register */
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#define LPDDR_START_EXECUTION 0x0001
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/* Defines possible value of PFOW program/erase suspend register */
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#define LPDDR_SUSPEND 0x0001
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/* Possible values of PFOW device status register */
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/* access R - read; RC read & clearable */
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#define DSR_DPS (1<<1) /* RC; device protect status
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* 0 - not protected 1 - locked */
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#define DSR_PSS (1<<2) /* R; program suspend status;
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* 0-prog in progress/completed,
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* 1- prog suspended */
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#define DSR_VPPS (1<<3) /* RC; 0-Vpp OK, * 1-Vpp low */
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#define DSR_PROGRAM_STATUS (1<<4) /* RC; 0-successful, 1-error */
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#define DSR_ERASE_STATUS (1<<5) /* RC; erase or blank check status;
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* 0-success erase/blank check,
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* 1 blank check error */
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#define DSR_ESS (1<<6) /* R; erase suspend status;
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* 0-erase in progress/complete,
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* 1 erase suspended */
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#define DSR_READY_STATUS (1<<7) /* R; Device status
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* 0-busy,
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* 1-ready */
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#define DSR_RPS (0x3<<8) /* RC; region program status
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* 00 - Success,
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* 01-re-program attempt in region with
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* object mode data,
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* 10-object mode program w attempt in
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* region with control mode data
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* 11-attempt to program invalid half
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* with 0x41 command */
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#define DSR_AOS (1<<12) /* RC; 1- AO related failure */
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#define DSR_AVAILABLE (1<<15) /* R; Device availbility
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* 1 - Device available
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* 0 - not available */
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/* The superset of all possible error bits in DSR */
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#define DSR_ERR 0x133A
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static inline void send_pfow_command(struct map_info *map,
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unsigned long cmd_code, unsigned long adr,
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unsigned long len, map_word *datum)
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{
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int bits_per_chip = map_bankwidth(map) * 8;
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map_write(map, CMD(cmd_code), map->pfow_base + PFOW_COMMAND_CODE);
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map_write(map, CMD(adr & ((1<<bits_per_chip) - 1)),
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map->pfow_base + PFOW_COMMAND_ADDRESS_L);
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map_write(map, CMD(adr>>bits_per_chip),
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map->pfow_base + PFOW_COMMAND_ADDRESS_H);
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if (len) {
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map_write(map, CMD(len & ((1<<bits_per_chip) - 1)),
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map->pfow_base + PFOW_DATA_COUNT_L);
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map_write(map, CMD(len>>bits_per_chip),
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map->pfow_base + PFOW_DATA_COUNT_H);
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}
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if (datum)
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map_write(map, *datum, map->pfow_base + PFOW_COMMAND_DATA);
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/* Command execution start */
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map_write(map, CMD(LPDDR_START_EXECUTION),
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map->pfow_base + PFOW_COMMAND_EXECUTE);
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}
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#endif /* __LINUX_MTD_PFOW_H */
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