1 /***************************************************************************
2 * Copyright (C) 2015 by Tobias Diedrich *
3 * <ranma+openwrt@tdiedrich.de> *
5 * based on the stmsmi code written by Antonio Borneo *
6 * <borneo.antonio@gmail.com> *
8 * This program is free software; you can redistribute it and/or modify *
9 * it under the terms of the GNU General Public License as published by *
10 * the Free Software Foundation; either version 2 of the License, or *
11 * (at your option) any later version. *
13 * This program is distributed in the hope that it will be useful, *
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16 * GNU General Public License for more details. *
18 * You should have received a copy of the GNU General Public License *
19 * along with this program; if not, write to the *
20 * Free Software Foundation, Inc. *
22 ***************************************************************************/
24 * Driver for the Atheros AR7xxx/AR9xxx SPI flash interface.
26 * Since no SPI mode register is present, presumably only
27 * SPI "mode 3" (CPOL=1 and CPHA=1) is supported.
29 * The SPI interface supports up to 3 chip selects, however the SPI flash
30 * used for booting the system must be connected to CS0.
32 * On boot, the first 4MiB of flash space are memory-mapped into the
33 * area bf000000 - bfffffff (4 copies), so the MIPS bootstrap
34 * vector bfc00000 is mapped to the beginning of the flash.
36 * By writing a 1 to the REMAP_DISABLE bit in the SPI_CONTROL register,
37 * the full area of 16MiB is mapped.
39 * By writing a 0 to the SPI_FUNCTION_SELECT register (write-only dword
40 * register @bf000000), memory mapping is disabled and the SPI registers
41 * are exposed to the CPU instead:
42 * bf000000 SPI_FUNCTION_SELECT
43 * bf000004 SPI_CONTROL
44 * bf000008 SPI_IO_CONTROL
45 * bf00000c SPI_READ_DATA
47 * When not memory-mapped, the SPI interface is essentially bitbanged
48 * using SPI_CONTROL and SPI_IO_CONTROL with the only hardware-assistance
49 * being the 32bit read-only shift-register SPI_READ_DATA.
58 #include <jtag/jtag.h>
59 #include <helper/time_support.h>
60 #include <helper/types.h>
61 #include <target/mips32.h>
62 #include <target/mips32_pracc.h>
63 #include <target/target.h>
65 #define BITS_PER_BYTE 8
67 #define ATH79_REG_FS 0
68 #define ATH79_REG_CLOCK 4
69 #define ATH79_REG_WRITE 8
70 #define ATH79_REG_DATA 12
72 #define ATH79_SPI_CS_ALLHI 0x70000
73 #define ATH79_SPI_CS0_HI 0x10000
74 #define ATH79_SPI_CS1_HI 0x20000
75 #define ATH79_SPI_CS2_HI 0x40000
76 #define ATH79_SPI_CE_HI 0x00100
77 #define ATH79_SPI_DO_HI 0x00001
79 #define ATH79_XFER_FINAL 0x00000001
80 #define ATH79_XFER_PARTIAL 0x00000000
83 #define ATH79_MAX_TIMEOUT (3000)
85 struct ath79_spi_ctx
{
91 struct ath79_flash_bank
{
95 const struct flash_device
*dev
;
96 struct ath79_spi_ctx spi
;
105 static const struct ath79_target target_devices
[] = {
106 /* name, tap_idcode, io_base */
107 { "ATH79", 0x00000001, 0xbf000000 },
111 static const uint32_t ath79_chipselects
[] = {
112 (~ATH79_SPI_CS0_HI
& ATH79_SPI_CS_ALLHI
),
113 (~ATH79_SPI_CS1_HI
& ATH79_SPI_CS_ALLHI
),
114 (~ATH79_SPI_CS2_HI
& ATH79_SPI_CS_ALLHI
),
117 static void ath79_pracc_addn(struct pracc_queue_info
*ctx
,
118 const uint32_t *instr
,
121 for (int i
= 0; i
< n
; i
++)
122 pracc_add(ctx
, 0, instr
[i
]);
125 static int ath79_spi_bitbang_codegen(struct ath79_flash_bank
*ath79_info
,
126 struct pracc_queue_info
*ctx
,
127 uint8_t *data
, int len
,
130 uint32_t cs_high
= ATH79_SPI_CS_ALLHI
;
131 uint32_t cs_low
= ath79_chipselects
[ath79_info
->chipselect
];
132 uint32_t clock_high
= cs_low
| ATH79_SPI_CE_HI
;
133 uint32_t clock_low
= cs_low
;
134 uint32_t pracc_out
= 0;
135 uint32_t io_base
= ath79_info
->io_base
;
137 const uint32_t preamble1
[] = {
138 /* $15 = MIPS32_PRACC_BASE_ADDR */
139 MIPS32_LUI(0, 15, PRACC_UPPER_BASE_ADDR
),
141 MIPS32_LUI(0, 1, UPPER16(io_base
)),
143 ath79_pracc_addn(ctx
, preamble1
, ARRAY_SIZE(preamble1
));
144 if (ath79_info
->spi
.pre_deselect
) {
145 /* Clear deselect flag so we don't deselect again if
146 * this is a partial xfer.
148 ath79_info
->spi
.pre_deselect
= 0;
149 const uint32_t pre_deselect
[] = {
150 /* [$1 + FS] = 1 (enable flash io register access) */
151 MIPS32_LUI(0, 2, UPPER16(1)),
152 MIPS32_ORI(0, 2, 2, LOWER16(1)),
153 MIPS32_SW(0, 2, ATH79_REG_FS
, 1),
154 /* deselect flash just in case */
155 /* $2 = SPI_CS_DIS */
156 MIPS32_LUI(0, 2, UPPER16(cs_high
)),
157 MIPS32_ORI(0, 2, 2, LOWER16(cs_high
)),
158 /* [$1 + WRITE] = $2 */
159 MIPS32_SW(0, 2, ATH79_REG_WRITE
, 1),
161 ath79_pracc_addn(ctx
, pre_deselect
, ARRAY_SIZE(pre_deselect
));
163 const uint32_t preamble2
[] = {
164 /* t0 = CLOCK_LOW + 0-bit */
165 MIPS32_LUI(0, 8, UPPER16((clock_low
+ 0))),
166 MIPS32_ORI(0, 8, 8, LOWER16((clock_low
+ 0))),
167 /* t1 = CLOCK_LOW + 1-bit */
168 MIPS32_LUI(0, 9, UPPER16((clock_low
+ 1))),
169 MIPS32_ORI(0, 9, 9, LOWER16((clock_low
+ 1))),
170 /* t2 = CLOCK_HIGH + 0-bit */
171 MIPS32_LUI(0, 10, UPPER16((clock_high
+ 0))),
172 MIPS32_ORI(0, 10, 10, LOWER16((clock_high
+ 0))),
173 /* t3 = CLOCK_HIGH + 1-bit */
174 MIPS32_LUI(0, 11, UPPER16((clock_high
+ 1))),
175 MIPS32_ORI(0, 11, 11, LOWER16((clock_high
+ 1))),
177 ath79_pracc_addn(ctx
, preamble2
, ARRAY_SIZE(preamble2
));
179 for (int i
= 0; i
< len
; i
++) {
182 /* Generate bitbang code for one byte, highest bit first .*/
183 for (int j
= BITS_PER_BYTE
- 1; j
>= 0; j
--) {
184 int bit
= ((x
>> j
) & 1);
187 /* [$1 + WRITE] = t1 */
189 MIPS32_SW(0, 9, ATH79_REG_WRITE
, 1));
190 /* [$1 + WRITE] = t3 */
192 MIPS32_SW(0, 11, ATH79_REG_WRITE
, 1));
194 /* [$1 + WRITE] = t0 */
196 MIPS32_SW(0, 8, ATH79_REG_WRITE
, 1));
197 /* [$1 + WRITE] = t2 */
199 MIPS32_SW(0, 10, ATH79_REG_WRITE
, 1));
203 /* $3 = [$1 + DATA] */
204 pracc_add(ctx
, 0, MIPS32_LW(0, 3, ATH79_REG_DATA
, 1));
206 pracc_add(ctx
, MIPS32_PRACC_PARAM_OUT
+ pracc_out
,
207 MIPS32_SW(0, 3, PRACC_OUT_OFFSET
+
212 if (len
& 3) { /* not a multiple of 4 bytes */
213 /* $3 = [$1 + DATA] */
214 pracc_add(ctx
, 0, MIPS32_LW(0, 3, ATH79_REG_DATA
, 1));
216 pracc_add(ctx
, MIPS32_PRACC_PARAM_OUT
+ pracc_out
,
217 MIPS32_SW(0, 3, PRACC_OUT_OFFSET
+ pracc_out
, 15));
221 if (ath79_info
->spi
.post_deselect
&& !partial_xfer
) {
222 const uint32_t post_deselect
[] = {
223 /* $2 = SPI_CS_DIS */
224 MIPS32_LUI(0, 2, UPPER16(cs_high
)),
225 MIPS32_ORI(0, 2, 2, LOWER16(cs_high
)),
226 /* [$1 + WRITE] = $2 */
227 MIPS32_SW(0, 2, ATH79_REG_WRITE
, 1),
229 /* [$1 + FS] = 0 (disable flash io register access) */
230 MIPS32_XORI(0, 2, 2, 0),
231 MIPS32_SW(0, 2, ATH79_REG_FS
, 1),
233 ath79_pracc_addn(ctx
, post_deselect
, ARRAY_SIZE(post_deselect
));
236 /* common pracc epilogue */
238 pracc_add(ctx
, 0, MIPS32_B(0, NEG16(ctx
->code_count
+ 1)));
239 /* restore $15 from DeSave */
240 pracc_add(ctx
, 0, MIPS32_MFC0(0, 15, 31, 0));
242 return pracc_out
/ 4;
245 static int ath79_spi_bitbang_chunk(struct flash_bank
*bank
,
246 uint8_t *data
, int len
, int *transferred
)
248 struct target
*target
= bank
->target
;
249 struct ath79_flash_bank
*ath79_info
= bank
->driver_priv
;
250 struct mips32_common
*mips32
= target_to_mips32(target
);
251 struct mips_ejtag
*ejtag_info
= &mips32
->ejtag_info
;
255 * These constants must match the worst case in the above code
256 * generator function ath79_spi_bitbang_codegen.
258 const int pracc_pre_post
= 26;
259 const int pracc_loop_byte
= 8 * 2 + 2;
261 struct pracc_queue_info ctx
= {
262 .ejtag_info
= ejtag_info
264 int max_len
= (PRACC_MAX_INSTRUCTIONS
- pracc_pre_post
) / pracc_loop_byte
;
265 int to_xfer
= len
> max_len
? max_len
: len
;
266 int partial_xfer
= len
!= to_xfer
;
267 int padded_len
= (to_xfer
+ 3) & ~3;
268 uint32_t *out
= malloc(padded_len
);
271 LOG_ERROR("not enough memory");
276 pracc_queue_init(&ctx
);
278 LOG_DEBUG("ath79_spi_bitbang_bytes(%p, %08x, %p, %d)",
279 target
, ath79_info
->io_base
, data
, len
);
281 LOG_DEBUG("max code %d => max len %d. to_xfer %d",
282 PRACC_MAX_INSTRUCTIONS
, max_len
, to_xfer
);
284 pracc_words
= ath79_spi_bitbang_codegen(
285 ath79_info
, &ctx
, data
, to_xfer
, partial_xfer
);
287 LOG_DEBUG("Assembled %d instructions, %d stores",
288 ctx
.code_count
, ctx
.store_count
);
290 ctx
.retval
= mips32_pracc_queue_exec(ejtag_info
, &ctx
, out
, 1);
291 if (ctx
.retval
!= ERROR_OK
)
294 if (to_xfer
& 3) { /* Not a multiple of 4 bytes. */
296 * Need to realign last word since we didn't shift the
299 int missed_bytes
= 4 - (to_xfer
& 3);
301 out
[pracc_words
- 1] <<= BITS_PER_BYTE
* missed_bytes
;
305 * pracc reads return uint32_t in host endianness, convert to
307 * Since we know the ATH79 target is big endian and the SPI
308 * shift register has the bytes in highest to lowest bit order,
309 * this will ensure correct memory byte order regardless of host
312 target_buffer_set_u32_array(target
, (uint8_t *)out
, pracc_words
, out
);
314 if (LOG_LEVEL_IS(LOG_LVL_DEBUG
)) {
315 for (int i
= 0; i
< to_xfer
; i
++) {
316 LOG_DEBUG("bitbang %02x => %02x",
317 data
[i
], ((uint8_t *)out
)[i
]);
320 memcpy(data
, out
, to_xfer
);
321 *transferred
= to_xfer
;
324 pracc_queue_free(&ctx
);
329 static void ath79_spi_bitbang_prepare(struct flash_bank
*bank
)
331 struct ath79_flash_bank
*ath79_info
= bank
->driver_priv
;
333 ath79_info
->spi
.pre_deselect
= 1;
336 static int ath79_spi_bitbang_bytes(struct flash_bank
*bank
,
337 uint8_t *data
, int len
, uint32_t flags
)
339 struct ath79_flash_bank
*ath79_info
= bank
->driver_priv
;
343 ath79_info
->spi
.post_deselect
= !!(flags
& ATH79_XFER_FINAL
);
347 retval
= ath79_spi_bitbang_chunk(
348 bank
, data
, len
, &transferred
);
349 if (retval
!= ERROR_OK
)
359 FLASH_BANK_COMMAND_HANDLER(ath79_flash_bank_command
)
361 struct ath79_flash_bank
*ath79_info
;
364 LOG_DEBUG("%s", __func__
);
366 if (CMD_ARGC
< 6 || CMD_ARGC
> 7)
367 return ERROR_COMMAND_SYNTAX_ERROR
;
370 if (strcmp(CMD_ARGV
[6], "cs0") == 0)
371 chipselect
= 0; /* default */
372 else if (strcmp(CMD_ARGV
[6], "cs1") == 0)
374 else if (strcmp(CMD_ARGV
[6], "cs2") == 0)
377 LOG_ERROR("Unknown arg: %s", CMD_ARGV
[6]);
378 return ERROR_COMMAND_SYNTAX_ERROR
;
382 ath79_info
= calloc(1, sizeof(struct ath79_flash_bank
));
384 LOG_ERROR("not enough memory");
388 ath79_info
->chipselect
= chipselect
;
389 bank
->driver_priv
= ath79_info
;
394 /* Read the status register of the external SPI flash chip. */
395 static int read_status_reg(struct flash_bank
*bank
, uint32_t *status
)
397 uint8_t spi_bytes
[] = {SPIFLASH_READ_STATUS
, 0};
400 /* Send SPI command "read STATUS" */
401 ath79_spi_bitbang_prepare(bank
);
402 retval
= ath79_spi_bitbang_bytes(
403 bank
, spi_bytes
, sizeof(spi_bytes
),
406 *status
= spi_bytes
[1];
411 /* check for WIP (write in progress) bit in status register */
413 static int wait_till_ready(struct flash_bank
*bank
, int timeout
)
419 endtime
= timeval_ms() + timeout
;
421 /* read flash status register */
422 retval
= read_status_reg(bank
, &status
);
423 if (retval
!= ERROR_OK
)
426 if ((status
& SPIFLASH_BSY_BIT
) == 0)
429 } while (timeval_ms() < endtime
);
431 LOG_ERROR("timeout");
435 /* Send "write enable" command to SPI flash chip. */
436 static int ath79_write_enable(struct flash_bank
*bank
)
441 uint8_t spi_bytes
[] = {SPIFLASH_WRITE_ENABLE
};
443 /* Send SPI command "write enable" */
444 ath79_spi_bitbang_prepare(bank
);
445 retval
= ath79_spi_bitbang_bytes(
446 bank
, spi_bytes
, sizeof(spi_bytes
),
448 if (retval
!= ERROR_OK
)
451 /* read flash status register */
452 retval
= read_status_reg(bank
, &status
);
453 if (retval
!= ERROR_OK
)
456 /* Check write enabled */
457 if ((status
& SPIFLASH_WE_BIT
) == 0) {
458 LOG_ERROR("Cannot enable write to flash. Status=0x%08" PRIx32
,
466 static int erase_command(struct flash_bank
*bank
, int sector
)
468 struct ath79_flash_bank
*ath79_info
= bank
->driver_priv
;
469 uint32_t offset
= bank
->sectors
[sector
].offset
;
471 uint8_t spi_bytes
[] = {
472 ath79_info
->dev
->erase_cmd
,
478 /* bitbang command */
479 ath79_spi_bitbang_prepare(bank
);
480 return ath79_spi_bitbang_bytes(
481 bank
, spi_bytes
, sizeof(spi_bytes
),
485 static int ath79_erase_sector(struct flash_bank
*bank
, int sector
)
487 int retval
= ath79_write_enable(bank
);
489 if (retval
!= ERROR_OK
)
492 /* send SPI command "block erase" */
493 retval
= erase_command(bank
, sector
);
494 if (retval
!= ERROR_OK
)
497 /* poll WIP for end of self timed Sector Erase cycle */
498 return wait_till_ready(bank
, ATH79_MAX_TIMEOUT
);
501 static int ath79_erase(struct flash_bank
*bank
, int first
, int last
)
503 struct target
*target
= bank
->target
;
504 struct ath79_flash_bank
*ath79_info
= bank
->driver_priv
;
505 int retval
= ERROR_OK
;
508 LOG_DEBUG("%s: from sector %d to sector %d", __func__
, first
, last
);
510 if (target
->state
!= TARGET_HALTED
) {
511 LOG_ERROR("Target not halted");
512 return ERROR_TARGET_NOT_HALTED
;
515 if ((first
< 0) || (last
< first
) || (last
>= bank
->num_sectors
)) {
516 LOG_ERROR("Flash sector invalid");
517 return ERROR_FLASH_SECTOR_INVALID
;
520 if (!ath79_info
->probed
) {
521 LOG_ERROR("Flash bank not probed");
522 return ERROR_FLASH_BANK_NOT_PROBED
;
525 if (ath79_info
->dev
->erase_cmd
== 0x00)
526 return ERROR_FLASH_OPER_UNSUPPORTED
;
528 for (sector
= first
; sector
<= last
; sector
++) {
529 if (bank
->sectors
[sector
].is_protected
) {
530 LOG_ERROR("Flash sector %d protected", sector
);
535 for (sector
= first
; sector
<= last
; sector
++) {
536 retval
= ath79_erase_sector(bank
, sector
);
537 if (retval
!= ERROR_OK
)
545 static int ath79_protect(struct flash_bank
*bank
, int set
,
550 for (sector
= first
; sector
<= last
; sector
++)
551 bank
->sectors
[sector
].is_protected
= set
;
555 static int ath79_write_page(struct flash_bank
*bank
, const uint8_t *buffer
,
556 uint32_t address
, uint32_t len
)
558 struct ath79_flash_bank
*ath79_info
= bank
->driver_priv
;
559 uint8_t spi_bytes
[] = {
560 SPIFLASH_PAGE_PROGRAM
,
566 uint32_t i
, pagesize
;
568 /* if no write pagesize, use reasonable default */
569 pagesize
= ath79_info
->dev
->pagesize
?
570 ath79_info
->dev
->pagesize
: SPIFLASH_DEF_PAGESIZE
;
572 if (address
& 0xff) {
573 LOG_ERROR("ath79_write_page: unaligned write address: %08x",
577 if (!ath79_info
->spi
.page_buf
) {
578 LOG_ERROR("ath79_write_page: page buffer not initialized");
581 if (len
> ath79_info
->dev
->pagesize
) {
582 LOG_ERROR("ath79_write_page: len bigger than page size %d: %d",
587 for (i
= 0; i
< len
; i
++) {
588 if (buffer
[i
] != 0xff)
591 if (i
== len
) /* all 0xff, no need to program. */
594 LOG_INFO("writing %d bytes to flash page @0x%08x", len
, address
);
596 memcpy(ath79_info
->spi
.page_buf
, buffer
, len
);
599 retval
= ath79_write_enable(bank
);
600 if (retval
!= ERROR_OK
)
603 /* bitbang command */
604 ath79_spi_bitbang_prepare(bank
);
605 retval
= ath79_spi_bitbang_bytes(
606 bank
, spi_bytes
, sizeof(spi_bytes
),
608 if (retval
!= ERROR_OK
)
612 return ath79_spi_bitbang_bytes(
613 bank
, ath79_info
->spi
.page_buf
, len
,
617 static int ath79_write_buffer(struct flash_bank
*bank
, const uint8_t *buffer
,
618 uint32_t address
, uint32_t len
)
620 struct ath79_flash_bank
*ath79_info
= bank
->driver_priv
;
624 LOG_DEBUG("%s: address=0x%08" PRIx32
" len=0x%08" PRIx32
,
625 __func__
, address
, len
);
627 /* if no valid page_size, use reasonable default */
628 page_size
= ath79_info
->dev
->pagesize
?
629 ath79_info
->dev
->pagesize
: SPIFLASH_DEF_PAGESIZE
;
632 int page_len
= len
> page_size
? page_size
: len
;
634 retval
= ath79_write_page(
635 bank
, buffer
, address
, page_len
);
636 if (retval
!= ERROR_OK
)
640 address
+= page_size
;
647 static int ath79_write(struct flash_bank
*bank
, const uint8_t *buffer
,
648 uint32_t offset
, uint32_t count
)
650 struct target
*target
= bank
->target
;
653 LOG_DEBUG("%s: offset=0x%08" PRIx32
" count=0x%08" PRIx32
,
654 __func__
, offset
, count
);
656 if (offset
< bank
->base
|| offset
>= bank
->base
+ bank
->size
) {
657 LOG_ERROR("Start address out of range");
661 offset
-= bank
->base
;
663 if (target
->state
!= TARGET_HALTED
) {
664 LOG_ERROR("Target not halted");
665 return ERROR_TARGET_NOT_HALTED
;
668 if (offset
+ count
> bank
->size
) {
669 LOG_WARNING("Write pasts end of flash. Extra data discarded.");
670 count
= bank
->size
- offset
;
673 /* Check sector protection */
674 for (sector
= 0; sector
< bank
->num_sectors
; sector
++) {
675 /* Start offset in or before this sector? */
676 /* End offset in or behind this sector? */
677 struct flash_sector
*bs
= &bank
->sectors
[sector
];
679 if ((offset
< (bs
->offset
+ bs
->size
)) &&
680 ((offset
+ count
- 1) >= bs
->offset
) &&
682 LOG_ERROR("Flash sector %d protected", sector
);
687 return ath79_write_buffer(bank
, buffer
, offset
, count
);
690 static int ath79_read_buffer(struct flash_bank
*bank
, uint8_t *buffer
,
691 uint32_t address
, uint32_t len
)
693 uint8_t spi_bytes
[] = {
701 LOG_DEBUG("%s: address=0x%08" PRIx32
" len=0x%08" PRIx32
,
702 __func__
, address
, len
);
704 if (address
& 0xff) {
705 LOG_ERROR("ath79_read_buffer: unaligned read address: %08x",
710 LOG_INFO("reading %d bytes from flash @0x%08x", len
, address
);
712 /* bitbang command */
713 ath79_spi_bitbang_prepare(bank
);
714 retval
= ath79_spi_bitbang_bytes(
715 bank
, spi_bytes
, sizeof(spi_bytes
), ATH79_XFER_PARTIAL
);
716 if (retval
!= ERROR_OK
)
720 return ath79_spi_bitbang_bytes(
721 bank
, buffer
, len
, ATH79_XFER_FINAL
);
724 static int ath79_read(struct flash_bank
*bank
, uint8_t *buffer
,
725 uint32_t offset
, uint32_t count
)
727 struct target
*target
= bank
->target
;
729 LOG_DEBUG("%s: offset=0x%08" PRIx32
" count=0x%08" PRIx32
,
730 __func__
, offset
, count
);
732 if (offset
< bank
->base
|| offset
>= bank
->base
+ bank
->size
) {
733 LOG_ERROR("Start address out of range");
737 offset
-= bank
->base
;
739 if (target
->state
!= TARGET_HALTED
) {
740 LOG_ERROR("Target not halted");
741 return ERROR_TARGET_NOT_HALTED
;
744 if (offset
+ count
> bank
->size
) {
745 LOG_WARNING("Reads past end of flash. Extra data discarded.");
746 count
= bank
->size
- offset
;
749 return ath79_read_buffer(bank
, buffer
, offset
, count
);
752 /* Return ID of flash device */
753 static int read_flash_id(struct flash_bank
*bank
, uint32_t *id
)
755 struct target
*target
= bank
->target
;
757 uint8_t spi_bytes
[] = {SPIFLASH_READ_ID
, 0, 0, 0};
759 if (target
->state
!= TARGET_HALTED
) {
760 LOG_ERROR("Target not halted");
761 return ERROR_TARGET_NOT_HALTED
;
764 /* Send SPI command "read ID" */
765 ath79_spi_bitbang_prepare(bank
);
766 retval
= ath79_spi_bitbang_bytes(
767 bank
, spi_bytes
, sizeof(spi_bytes
), ATH79_XFER_FINAL
);
768 if (retval
!= ERROR_OK
)
771 *id
= (spi_bytes
[1] << 0)
772 | (spi_bytes
[2] << 8)
773 | (spi_bytes
[3] << 16);
775 if (*id
== 0xffffff) {
776 LOG_ERROR("No SPI flash found");
783 static int ath79_probe(struct flash_bank
*bank
)
785 struct target
*target
= bank
->target
;
786 struct ath79_flash_bank
*ath79_info
= bank
->driver_priv
;
787 struct flash_sector
*sectors
;
788 uint32_t id
= 0; /* silence uninitialized warning */
789 uint32_t pagesize
, sectorsize
;
790 const struct ath79_target
*target_device
;
793 if (ath79_info
->probed
) {
795 free(ath79_info
->spi
.page_buf
);
797 ath79_info
->probed
= 0;
799 for (target_device
= target_devices
; target_device
->name
;
801 if (target_device
->tap_idcode
== target
->tap
->idcode
)
803 if (!target_device
->name
) {
804 LOG_ERROR("Device ID 0x%" PRIx32
" is not known",
805 target
->tap
->idcode
);
809 ath79_info
->io_base
= target_device
->io_base
;
811 LOG_DEBUG("Found device %s at address 0x%" PRIx32
,
812 target_device
->name
, bank
->base
);
814 retval
= read_flash_id(bank
, &id
);
815 if (retval
!= ERROR_OK
)
818 ath79_info
->dev
= NULL
;
819 for (const struct flash_device
*p
= flash_devices
; p
->name
; p
++)
820 if (p
->device_id
== id
) {
825 if (!ath79_info
->dev
) {
826 LOG_ERROR("Unknown flash device (ID 0x%08" PRIx32
")", id
);
830 LOG_INFO("Found flash device \'%s\' (ID 0x%08" PRIx32
")",
831 ath79_info
->dev
->name
, ath79_info
->dev
->device_id
);
833 /* Set correct size value */
834 bank
->size
= ath79_info
->dev
->size_in_bytes
;
835 if (bank
->size
<= (1UL << 16))
836 LOG_WARNING("device needs 2-byte addresses - not implemented");
837 if (bank
->size
> (1UL << 24))
838 LOG_WARNING("device needs paging or 4-byte addresses - not implemented");
840 /* if no sectors, treat whole bank as single sector */
841 sectorsize
= ath79_info
->dev
->sectorsize
?
842 ath79_info
->dev
->sectorsize
: ath79_info
->dev
->size_in_bytes
;
844 /* create and fill sectors array */
845 bank
->num_sectors
= ath79_info
->dev
->size_in_bytes
/ sectorsize
;
846 sectors
= calloc(1, sizeof(struct flash_sector
) * bank
->num_sectors
);
848 LOG_ERROR("not enough memory");
852 /* if no write pagesize, use reasonable default */
853 pagesize
= ath79_info
->dev
->pagesize
? ath79_info
->dev
->pagesize
: SPIFLASH_DEF_PAGESIZE
;
855 ath79_info
->spi
.page_buf
= malloc(pagesize
);
856 if (!ath79_info
->spi
.page_buf
) {
857 LOG_ERROR("not enough memory");
862 for (int sector
= 0; sector
< bank
->num_sectors
; sector
++) {
863 sectors
[sector
].offset
= sector
* sectorsize
;
864 sectors
[sector
].size
= sectorsize
;
865 sectors
[sector
].is_erased
= 0;
866 sectors
[sector
].is_protected
= 1;
869 bank
->sectors
= sectors
;
870 ath79_info
->probed
= 1;
874 static int ath79_auto_probe(struct flash_bank
*bank
)
876 struct ath79_flash_bank
*ath79_info
= bank
->driver_priv
;
878 if (ath79_info
->probed
)
880 return ath79_probe(bank
);
883 static int ath79_flash_blank_check(struct flash_bank
*bank
)
885 /* Not implemented */
889 static int ath79_protect_check(struct flash_bank
*bank
)
891 /* Not implemented */
895 static int get_ath79_info(struct flash_bank
*bank
, char *buf
, int buf_size
)
897 struct ath79_flash_bank
*ath79_info
= bank
->driver_priv
;
899 if (!ath79_info
->probed
) {
900 snprintf(buf
, buf_size
,
901 "\nATH79 flash bank not probed yet\n");
905 snprintf(buf
, buf_size
, "\nATH79 flash information:\n"
906 " Device \'%s\' (ID 0x%08" PRIx32
")\n",
907 ath79_info
->dev
->name
, ath79_info
->dev
->device_id
);
912 struct flash_driver ath79_flash
= {
914 .flash_bank_command
= ath79_flash_bank_command
,
915 .erase
= ath79_erase
,
916 .protect
= ath79_protect
,
917 .write
= ath79_write
,
919 .probe
= ath79_probe
,
920 .auto_probe
= ath79_auto_probe
,
921 .erase_check
= ath79_flash_blank_check
,
922 .protect_check
= ath79_protect_check
,
923 .info
= get_ath79_info
,
924 .free_driver_priv
= default_flash_free_driver_priv
,
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