1 /***************************************************************************
2 * Copyright (C) 2019 Icenowy Zheng <icenowy@aosc.io> *
3 * Copyright (C) 2019 Caleb Szalacinski <contact@skiboy.net> *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) any later version. *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program. If not, see <http://www.gnu.org/licenses/>. *
17 ***************************************************************************/
24 #include <target/image.h>
26 #define SWM050_DELAY 100
28 #define SWM050_FLASH_PAGE_SIZE 0x200
29 #define SWM050_FLASH_PAGES 16
31 #define SWM050_CPU_ID 0xE000ED00
32 #define SWM050_CPU_ID_VAL 0x410CC200
34 #define SWM050_FLASH_REG1 0x1F000000
35 #define SWM050_FLASH_REG2 0x1F000038
36 #define SWM050_FLASH_KEY 0xAAAAAAAA
38 #define SWM050_SYSCTL_CFG_0 0x400F0000
39 #define SWM050_SYSCTL_DBLF 0x400F0008
41 static int swm050_erase(struct flash_bank
*bank
, unsigned int first
,
44 struct target
*target
= bank
->target
;
47 if (target
->state
!= TARGET_HALTED
) {
48 LOG_ERROR("Target not halted");
49 return ERROR_TARGET_NOT_HALTED
;
53 retval
= target_write_u32(target
, SWM050_FLASH_REG1
, 0x4);
54 if (retval
!= ERROR_OK
)
57 for (unsigned int curr_page
= first
; curr_page
<= last
; curr_page
++) {
58 uint32_t curr_addr
= bank
->base
+ (SWM050_FLASH_PAGE_SIZE
* curr_page
);
60 retval
= target_write_u32(target
, curr_addr
, SWM050_FLASH_KEY
);
61 if (retval
!= ERROR_OK
)
63 alive_sleep(SWM050_DELAY
);
66 /* Close flash interface */
67 retval
= target_write_u32(target
, SWM050_FLASH_REG1
, 0x0);
68 if (retval
!= ERROR_OK
)
74 static int swm050_write(struct flash_bank
*bank
, const uint8_t *buffer
, uint32_t offset
, uint32_t count
)
76 struct target
*target
= bank
->target
;
79 if (target
->state
!= TARGET_HALTED
) {
80 LOG_ERROR("Target not halted");
81 retval
= ERROR_TARGET_NOT_HALTED
;
86 retval
= target_write_u32(target
, SWM050_FLASH_REG1
, 0x1);
87 if (retval
!= ERROR_OK
)
90 retval
= target_write_memory(target
, bank
->base
+ offset
, 4, count
/4, buffer
);
91 if (retval
!= ERROR_OK
)
94 /* Close flash interface */
95 retval
= target_write_u32(target
, SWM050_FLASH_REG1
, 0x0);
96 if (retval
!= ERROR_OK
)
102 static int swm050_probe(struct flash_bank
*bank
)
107 static int swm050_mass_erase(struct flash_bank
*bank
)
109 struct target
*target
= bank
->target
;
112 if (target
->state
!= TARGET_HALTED
) {
113 LOG_ERROR("Target not halted");
114 return ERROR_TARGET_NOT_HALTED
;
117 /* Perform mass erase */
118 retval
= target_write_u32(target
, SWM050_FLASH_REG1
, 0x6);
119 if (retval
!= ERROR_OK
)
121 retval
= target_write_u32(target
, SWM050_FLASH_REG2
, 0x1);
122 if (retval
!= ERROR_OK
)
124 retval
= target_write_u32(target
, 0x0, SWM050_FLASH_KEY
);
125 if (retval
!= ERROR_OK
)
128 alive_sleep(SWM050_DELAY
);
130 /* Close flash interface */
131 retval
= target_write_u32(target
, SWM050_FLASH_REG1
, 0x0);
132 if (retval
!= ERROR_OK
)
138 COMMAND_HANDLER(swm050_handle_mass_erase_command
)
141 return ERROR_COMMAND_SYNTAX_ERROR
;
143 struct flash_bank
*bank
;
144 int retval
= CALL_COMMAND_HANDLER(flash_command_get_bank
, 0, &bank
);
145 if (retval
!= ERROR_OK
)
148 retval
= swm050_mass_erase(bank
);
149 if (retval
== ERROR_OK
)
150 command_print(CMD
, "swm050 mass erase complete");
152 command_print(CMD
, "swm050 mass erase failed");
157 FLASH_BANK_COMMAND_HANDLER(swm050_flash_bank_command
)
160 bank
->write_start_alignment
= 4;
161 bank
->write_end_alignment
= 4;
162 bank
->size
= SWM050_FLASH_PAGE_SIZE
* SWM050_FLASH_PAGES
;
164 bank
->num_sectors
= SWM050_FLASH_PAGES
;
165 bank
->sectors
= alloc_block_array(0, SWM050_FLASH_PAGE_SIZE
, SWM050_FLASH_PAGES
);
169 for (unsigned int i
= 0; i
< bank
->num_sectors
; i
++)
170 bank
->sectors
[i
].is_protected
= 0;
175 static const struct command_registration swm050_exec_command_handlers
[] = {
177 .name
= "mass_erase",
178 .handler
= swm050_handle_mass_erase_command
,
179 .mode
= COMMAND_EXEC
,
181 .help
= "Erase entire flash device.",
183 COMMAND_REGISTRATION_DONE
186 static const struct command_registration swm050_command_handlers
[] = {
190 .help
= "swm050 flash command group",
192 .chain
= swm050_exec_command_handlers
,
194 COMMAND_REGISTRATION_DONE
197 struct flash_driver swm050_flash
= {
199 .commands
= swm050_command_handlers
,
200 .flash_bank_command
= swm050_flash_bank_command
,
201 .erase
= swm050_erase
,
202 .write
= swm050_write
,
203 .read
= default_flash_read
,
204 .probe
= swm050_probe
,
205 .auto_probe
= swm050_probe
,
206 .erase_check
= default_flash_blank_check
,
207 .free_driver_priv
= default_flash_free_driver_priv
,
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