aboutsummaryrefslogtreecommitdiffstats
path: root/include/linux/mtd/pfow.h
blob: b730d4f84655613461dcfbd92629b72c55e50b05 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
/* Primary function overlay window definitions
 * and service functions used by LPDDR chips
 */
#ifndef __LINUX_MTD_PFOW_H
#define __LINUX_MTD_PFOW_H

#include <linux/mtd/qinfo.h>

/* PFOW registers addressing */
/* Address of symbol "P" */
#define PFOW_QUERY_STRING_P			0x0000
/* Address of symbol "F" */
#define PFOW_QUERY_STRING_F			0x0002
/* Address of symbol "O" */
#define PFOW_QUERY_STRING_O			0x0004
/* Address of symbol "W" */
#define PFOW_QUERY_STRING_W			0x0006
/* Identification info for LPDDR chip */
#define PFOW_MANUFACTURER_ID			0x0020
#define PFOW_DEVICE_ID				0x0022
/* Address in PFOW where prog buffer can can be found */
#define PFOW_PROGRAM_BUFFER_OFFSET		0x0040
/* Size of program buffer in words */
#define PFOW_PROGRAM_BUFFER_SIZE		0x0042
/* Address command code register */
#define PFOW_COMMAND_CODE			0x0080
/* command data register */
#define PFOW_COMMAND_DATA			0x0084
/* command address register lower address bits */
#define PFOW_COMMAND_ADDRESS_L			0x0088
/* command address register upper address bits */
#define PFOW_COMMAND_ADDRESS_H			0x008a
/* number of bytes to be proggrammed lower address bits */
#define PFOW_DATA_COUNT_L			0x0090
/* number of bytes to be proggrammed higher address bits */
#define PFOW_DATA_COUNT_H			0x0092
/* command execution register, the only possible value is 0x01 */
#define PFOW_COMMAND_EXECUTE			0x00c0
/* 0x01 should be written at this address to clear buffer */
#define PFOW_CLEAR_PROGRAM_BUFFER		0x00c4
/* device program/erase suspend register */
#define PFOW_PROGRAM_ERASE_SUSPEND		0x00c8
/* device status register */
#define PFOW_DSR				0x00cc

/* LPDDR memory device command codes */
/* They are possible values of PFOW command code register */
#define LPDDR_WORD_PROGRAM		0x0041
#define LPDDR_BUFF_PROGRAM		0x00E9
#define LPDDR_BLOCK_ERASE		0x0020
#define LPDDR_LOCK_BLOCK		0x0061
#define LPDDR_UNLOCK_BLOCK		0x0062
#define LPDDR_READ_BLOCK_LOCK_STATUS	0x0065
#define LPDDR_INFO_QUERY		0x0098
#define LPDDR_READ_OTP			0x0097
#define LPDDR_PROG_OTP			0x00C0
#define LPDDR_RESUME			0x00D0

/* Defines possible value of PFOW command execution register */
#define LPDDR_START_EXECUTION			0x0001

/* Defines possible value of PFOW program/erase suspend register */
#define LPDDR_SUSPEND				0x0001

/* Possible values of PFOW device status register */
/* access R - read; RC read & clearable */
#define DSR_DPS			(1<<1) /* RC; device protect status
					* 0 - not protected 1 - locked */
#define DSR_PSS			(1<<2) /* R; program suspend status;
					* 0-prog in progress/completed,
					* 1- prog suspended */
#define DSR_VPPS		(1<<3) /* RC; 0-Vpp OK, * 1-Vpp low */
#define DSR_PROGRAM_STATUS	(1<<4) /* RC; 0-successful, 1-error */
#define DSR_ERASE_STATUS	(1<<5) /* RC; erase or blank check status;
					* 0-success erase/blank check,
					* 1 blank check error */
#define DSR_ESS			(1<<6) /* R; erase suspend status;
					* 0-erase in progress/complete,
					* 1 erase suspended */
#define DSR_READY_STATUS	(1<<7) /* R; Device status
					* 0-busy,
					* 1-ready */
#define DSR_RPS			(0x3<<8) /* RC;  region program status
					* 00 - Success,
					* 01-re-program attempt in region with
					* object mode data,
					* 10-object mode program w attempt in
					* region with control mode data
					* 11-attempt to program invalid half
					* with 0x41 command */
#define DSR_AOS			(1<<12) /* RC; 1- AO related failure */
#define DSR_AVAILABLE		(1<<15) /* R; Device availbility
					* 1 - Device available
					* 0 - not available */

/* The superset of all possible error bits in DSR */
#define DSR_ERR			0x133A

static inline void send_pfow_command(struct map_info *map,
				unsigned long cmd_code, unsigned long adr,
				unsigned long len, map_word *datum)
{
	int bits_per_chip = map_bankwidth(map) * 8;
	int chipnum;
	struct lpddr_private *lpddr = map->fldrv_priv;
	chipnum = adr >> lpddr->chipshift;

	map_write(map, CMD(cmd_code), map->pfow_base + PFOW_COMMAND_CODE);
	map_write(map, CMD(adr & ((1<<bits_per_chip) - 1)),
				map->pfow_base + PFOW_COMMAND_ADDRESS_L);
	map_write(map, CMD(adr>>bits_per_chip),
				map->pfow_base + PFOW_COMMAND_ADDRESS_H);
	if (len) {
		map_write(map, CMD(len & ((1<<bits_per_chip) - 1)),
					map->pfow_base + PFOW_DATA_COUNT_L);
		map_write(map, CMD(len>>bits_per_chip),
					map->pfow_base + PFOW_DATA_COUNT_H);
	}
	if (datum)
		map_write(map, *datum, map->pfow_base + PFOW_COMMAND_DATA);

	/* Command execution start */
	map_write(map, CMD(LPDDR_START_EXECUTION),
			map->pfow_base + PFOW_COMMAND_EXECUTE);
}

static inline void print_drs_error(unsigned dsr)
{
	int prog_status = (dsr & DSR_RPS) >> 8;

	if (!(dsr & DSR_AVAILABLE))
		printk(KERN_NOTICE"DSR.15: (0) Device not Available\n");
	if (prog_status & 0x03)
		printk(KERN_NOTICE"DSR.9,8: (11) Attempt to program invalid "
						"half with 41h command\n");
	else if (prog_status & 0x02)
		printk(KERN_NOTICE"DSR.9,8: (10) Object Mode Program attempt "
					"in region with Control Mode data\n");
	else if (prog_status &  0x01)
		printk(KERN_NOTICE"DSR.9,8: (01) Program attempt in region "
						"with Object Mode data\n");
	if (!(dsr & DSR_READY_STATUS))
		printk(KERN_NOTICE"DSR.7: (0) Device is Busy\n");
	if (dsr & DSR_ESS)
		printk(KERN_NOTICE"DSR.6: (1) Erase Suspended\n");
	if (dsr & DSR_ERASE_STATUS)
		printk(KERN_NOTICE"DSR.5: (1) Erase/Blank check error\n");
	if (dsr & DSR_PROGRAM_STATUS)
		printk(KERN_NOTICE"DSR.4: (1) Program Error\n");
	if (dsr & DSR_VPPS)
		printk(KERN_NOTICE"DSR.3: (1) Vpp low detect, operation "
					"aborted\n");
	if (dsr & DSR_PSS)
		printk(KERN_NOTICE"DSR.2: (1) Program suspended\n");
	if (dsr & DSR_DPS)
		printk(KERN_NOTICE"DSR.1: (1) Aborted Erase/Program attempt "
					"on locked block\n");
}
#endif /* __LINUX_MTD_PFOW_H */