1 // SPDX-License-Identifier: GPL-2.0-or-later
3 /***************************************************************************
4 * Copyright (C) 2019 Icenowy Zheng <icenowy@aosc.io> *
5 * Copyright (C) 2019 Caleb Szalacinski <contact@skiboy.net> *
6 ***************************************************************************/
13 #include <target/image.h>
15 #define SWM050_DELAY 100
17 #define SWM050_FLASH_PAGE_SIZE 0x200
18 #define SWM050_FLASH_PAGES 16
20 #define SWM050_CPU_ID 0xE000ED00
21 #define SWM050_CPU_ID_VAL 0x410CC200
23 #define SWM050_FLASH_REG1 0x1F000000
24 #define SWM050_FLASH_REG2 0x1F000038
25 #define SWM050_FLASH_KEY 0xAAAAAAAA
27 #define SWM050_SYSCTL_CFG_0 0x400F0000
28 #define SWM050_SYSCTL_DBLF 0x400F0008
30 static int swm050_erase(struct flash_bank
*bank
, unsigned int first
,
33 struct target
*target
= bank
->target
;
36 if (target
->state
!= TARGET_HALTED
) {
37 LOG_ERROR("Target not halted");
38 return ERROR_TARGET_NOT_HALTED
;
42 retval
= target_write_u32(target
, SWM050_FLASH_REG1
, 0x4);
43 if (retval
!= ERROR_OK
)
46 for (unsigned int curr_page
= first
; curr_page
<= last
; curr_page
++) {
47 uint32_t curr_addr
= bank
->base
+ (SWM050_FLASH_PAGE_SIZE
* curr_page
);
49 retval
= target_write_u32(target
, curr_addr
, SWM050_FLASH_KEY
);
50 if (retval
!= ERROR_OK
)
52 alive_sleep(SWM050_DELAY
);
55 /* Close flash interface */
56 retval
= target_write_u32(target
, SWM050_FLASH_REG1
, 0x0);
57 if (retval
!= ERROR_OK
)
63 static int swm050_write(struct flash_bank
*bank
, const uint8_t *buffer
, uint32_t offset
, uint32_t count
)
65 struct target
*target
= bank
->target
;
68 if (target
->state
!= TARGET_HALTED
) {
69 LOG_ERROR("Target not halted");
70 retval
= ERROR_TARGET_NOT_HALTED
;
75 retval
= target_write_u32(target
, SWM050_FLASH_REG1
, 0x1);
76 if (retval
!= ERROR_OK
)
79 retval
= target_write_memory(target
, bank
->base
+ offset
, 4, count
/4, buffer
);
80 if (retval
!= ERROR_OK
)
83 /* Close flash interface */
84 retval
= target_write_u32(target
, SWM050_FLASH_REG1
, 0x0);
85 if (retval
!= ERROR_OK
)
91 static int swm050_probe(struct flash_bank
*bank
)
96 static int swm050_mass_erase(struct flash_bank
*bank
)
98 struct target
*target
= bank
->target
;
101 if (target
->state
!= TARGET_HALTED
) {
102 LOG_ERROR("Target not halted");
103 return ERROR_TARGET_NOT_HALTED
;
106 /* Perform mass erase */
107 retval
= target_write_u32(target
, SWM050_FLASH_REG1
, 0x6);
108 if (retval
!= ERROR_OK
)
110 retval
= target_write_u32(target
, SWM050_FLASH_REG2
, 0x1);
111 if (retval
!= ERROR_OK
)
113 retval
= target_write_u32(target
, 0x0, SWM050_FLASH_KEY
);
114 if (retval
!= ERROR_OK
)
117 alive_sleep(SWM050_DELAY
);
119 /* Close flash interface */
120 retval
= target_write_u32(target
, SWM050_FLASH_REG1
, 0x0);
121 if (retval
!= ERROR_OK
)
127 COMMAND_HANDLER(swm050_handle_mass_erase_command
)
130 return ERROR_COMMAND_SYNTAX_ERROR
;
132 struct flash_bank
*bank
;
133 int retval
= CALL_COMMAND_HANDLER(flash_command_get_bank
, 0, &bank
);
134 if (retval
!= ERROR_OK
)
137 retval
= swm050_mass_erase(bank
);
138 if (retval
== ERROR_OK
)
139 command_print(CMD
, "swm050 mass erase complete");
141 command_print(CMD
, "swm050 mass erase failed");
146 FLASH_BANK_COMMAND_HANDLER(swm050_flash_bank_command
)
149 bank
->write_start_alignment
= 4;
150 bank
->write_end_alignment
= 4;
151 bank
->size
= SWM050_FLASH_PAGE_SIZE
* SWM050_FLASH_PAGES
;
153 bank
->num_sectors
= SWM050_FLASH_PAGES
;
154 bank
->sectors
= alloc_block_array(0, SWM050_FLASH_PAGE_SIZE
, SWM050_FLASH_PAGES
);
158 for (unsigned int i
= 0; i
< bank
->num_sectors
; i
++)
159 bank
->sectors
[i
].is_protected
= 0;
164 static const struct command_registration swm050_exec_command_handlers
[] = {
166 .name
= "mass_erase",
167 .handler
= swm050_handle_mass_erase_command
,
168 .mode
= COMMAND_EXEC
,
170 .help
= "Erase entire flash device.",
172 COMMAND_REGISTRATION_DONE
175 static const struct command_registration swm050_command_handlers
[] = {
179 .help
= "swm050 flash command group",
181 .chain
= swm050_exec_command_handlers
,
183 COMMAND_REGISTRATION_DONE
186 const struct flash_driver swm050_flash
= {
188 .commands
= swm050_command_handlers
,
189 .flash_bank_command
= swm050_flash_bank_command
,
190 .erase
= swm050_erase
,
191 .write
= swm050_write
,
192 .read
= default_flash_read
,
193 .probe
= swm050_probe
,
194 .auto_probe
= swm050_probe
,
195 .erase_check
= default_flash_blank_check
,
196 .free_driver_priv
= default_flash_free_driver_priv
,
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