/* The MIT License (MIT) Copyright (c) 2016 Fred Sundvik Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #ifndef VISUALIZER_H #define VISUALIZER_H #include #include #include #include "gfx.h" #ifdef LCD_BACKLIGHT_ENABLE #include "lcd_backlight.h" #endif // This need to be called once at the start void visualizer_init(void); // This should be called at every matrix scan void visualizer_update(uint32_t default_state, uint32_t state, uint32_t leds); // This should be called when the keyboard goes to suspend state void visualizer_suspend(void); // This should be called when the keyboard wakes up from suspend state void visualizer_resume(void); // These functions are week, so they can be overridden by the keyboard // if needed GDisplay* get_lcd_display(void); GDisplay* get_led_display(void); // For emulator builds, this function need to be implemented #ifdef EMULATOR void draw_emulator(void); #endif // If you need support for more than 16 keyframes per animation, you can change this #define MAX_VISUALIZER_KEY_FRAMES 16 struct keyframe_animation_t; typedef struct { uint32_t layer; uint32_t default_layer; uint32_t leds; // See led.h for available statuses bool suspended; } visualizer_keyboard_status_t; // The state struct is used by the various keyframe functions // It's also used for setting the LCD color and layer text // from the user customized code typedef struct visualizer_state_t { // The user code should primarily be modifying these uint32_t target_lcd_color; const char* layer_text; // The user visualizer(and animation functions) can read these visualizer_keyboard_status_t status; // These are used by the animation functions uint32_t current_lcd_color; uint32_t prev_lcd_color; #ifdef LCD_ENABLE font_t font_fixed5x8; font_t font_dejavusansbold12; #endif } visualizer_state_t; // Any custom keyframe function should have this signature // return true to get continuous updates, otherwise you will only get one // update per frame typedef bool (*frame_func)(struct keyframe_animation_t*, visualizer_state_t*); // Represents a keyframe animation, so fields are internal to the system // while others are meant to be initialized by the user code typedef struct keyframe_animation_t { // These should be initialized int num_frames; bool loop; int frame_lengths[MAX_VISUALIZER_KEY_FRAMES]; frame_func frame_functions[MAX_VISUALIZER_KEY_FRAMES]; // Used internally by the system, and can also be read by // keyframe update functions int current_frame; int time_left_in_frame; bool first_update_of_frame; bool last_update_of_frame; bool need_update; } keyframe_animation_t; extern GDisplay* LCD_DISPLAY; extern GDisplay* LED_DISPLAY; void start_keyframe_animation(keyframe_animation_t* animation); void stop_keyframe_animation(keyframe_animation_t* animation); // This runs the next keyframe, but does not update the animation state // Useful for crossfades for example void run_next_keyframe(keyframe_animation_t* animation, visualizer_state_t* state); // Some predefined keyframe functions that can be used by the user code // Does nothing, useful for adding delays bool keyframe_no_operation(keyframe_animation_t* animation, visualizer_state_t* state); // Animates the LCD backlight color between the current color and the target color (of the state) bool keyframe_animate_backlight_color(keyframe_animation_t* animation, visualizer_state_t* state); // Sets the backlight color to the target color bool keyframe_set_backlight_color(keyframe_animation_t* animation, visualizer_state_t* state); // Displays the layer text centered vertically on the screen bool keyframe_display_layer_text(keyframe_animation_t* animation, visualizer_state_t* state); // Displays a bitmap (0/1) of all the currently active layers bool keyframe_display_layer_bitmap(keyframe_animation_t* animation, visualizer_state_t* state); bool keyframe_disable_lcd_and_backlight(keyframe_animation_t* animation, visualizer_state_t* state); bool keyframe_enable_lcd_and_backlight(keyframe_animation_t* animation, visualizer_state_t* state); // Call this once, when the initial animation has finished, alternatively you can call it // directly from the initalize_user_visualizer function (the animation can be null) bool enable_visualization(keyframe_animation_t* animation, visualizer_state_t* state); // These functions have to be implemented by the user void initialize_user_visualizer(visualizer_state_t* state); void update_user_visualizer_state(visualizer_state_t* state); void user_visualizer_suspend(visualizer_state_t* state); void user_visualizer_resume(visualizer_state_t* state); #endif /* VISUALIZER_H */ n97' href='#n97'>97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 
/*
 * Support for Atmel AT45DB series DataFlash chips.
 * This file is part of the flashrom project.
 *
 * Copyright (C) 2012 Aidan Thornton
 * Copyright (C) 2013 Stefan Tauner
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <string.h>
#include "flash.h"
#include "chipdrivers.h"
#include "programmer.h"
#include "spi.h"

/* Status register bits */
#define AT45DB_READY	(1<<7)
#define AT45DB_CMP	(1<<6)
#define AT45DB_PROT	(1<<1)
#define AT45DB_POWEROF2	(1<<0)

/* Opcodes */
#define AT45DB_STATUS 0xD7 /* NB: this is a block erase command on most other chips(!). */
#define AT45DB_DISABLE_PROTECT 0x3D, 0x2A, 0x7F, 0x9A
#define AT45DB_READ_ARRAY 0xE8
#define AT45DB_READ_PROTECT 0x32
#define AT45DB_READ_LOCKDOWN 0x35
#define AT45DB_PAGE_ERASE 0x81
#define AT45DB_BLOCK_ERASE 0x50
#define AT45DB_SECTOR_ERASE 0x7C
#define AT45DB_CHIP_ERASE 0xC7
#define AT45DB_CHIP_ERASE_ADDR 0x94809A /* Magic address. See usage. */
#define AT45DB_BUFFER1_WRITE 0x84
#define AT45DB_BUFFER1_PAGE_PROGRAM 0x88
/* Buffer 2 is unused yet.
#define AT45DB_BUFFER2_WRITE 0x87
#define AT45DB_BUFFER2_PAGE_PROGRAM 0x89
*/

static uint8_t at45db_read_status_register(struct flashctx *flash, uint8_t *status)
{
	static const uint8_t cmd[] = { AT45DB_STATUS };

	int ret = spi_send_command(flash, sizeof(cmd), 1, cmd, status);
	if (ret != 0)
		msg_cerr("Reading the status register failed!\n");
	else
		msg_cspew("Status register: 0x%02x.\n", *status);
	return ret;
}

int spi_disable_blockprotect_at45db(struct flashctx *flash)
{
	static const uint8_t cmd[4] = { AT45DB_DISABLE_PROTECT }; /* NB: 4 bytes magic number */
	int ret = spi_send_command(flash, sizeof(cmd), 0, cmd, NULL);
	if (ret != 0) {
		msg_cerr("Sending disable lockdown failed!\n");
		return ret;
	}
	uint8_t status;
	ret = at45db_read_status_register(flash, &status);
	if (ret != 0 || ((status & AT45DB_PROT) != 0)) {
		msg_cerr("Disabling lockdown failed!\n");
		return 1;
	}

	return 0;
}

static unsigned int at45db_get_sector_count(struct flashctx *flash)
{
	unsigned int i, j;
	unsigned int cnt = 0;
	for (i = 0; i < NUM_ERASEFUNCTIONS; i++) {
		if (flash->chip->block_erasers[i].block_erase == &spi_erase_at45db_sector) {
			for (j = 0; j < NUM_ERASEREGIONS; j++) {
				cnt += flash->chip->block_erasers[i].eraseblocks[j].count;
			}
		}
	}
	msg_cspew("%s: number of sectors=%u\n", __func__, cnt);
	return cnt;
}

/* Reads and prettyprints protection/lockdown registers.
 * Some elegance of the printouts had to be cut down a bit to share this code. */
static uint8_t at45db_prettyprint_protection_register(struct flashctx *flash, uint8_t opcode, const char *regname)
{
	const uint8_t cmd[] = { opcode, 0, 0, 0 };
	const size_t sec_count = at45db_get_sector_count(flash);
	if (sec_count < 2)
		return 0;

	/* The first two sectors share the first result byte. */
	uint8_t buf[at45db_get_sector_count(flash) - 1];

	int ret = spi_send_command(flash, sizeof(cmd), sizeof(buf), cmd, buf);
	if (ret != 0) {
		msg_cerr("Reading the %s register failed!\n", regname);
		return ret;
	}

	unsigned int i;
	for (i = 0; i < sizeof(buf); i++) {
		if (buf[i] != 0x00)
			break;
		if (i == sizeof(buf) - 1) {
			msg_cdbg("No Sector is %sed.\n", regname);
			return 0;
		}
	}

	/* TODO: print which addresses are mapped to (un)locked sectors. */
	msg_cdbg("Sector 0a is %s%sed.\n", ((buf[0] & 0xC0) == 0x00) ? "un" : "", regname);
	msg_cdbg("Sector 0b is %s%sed.\n", ((buf[0] & 0x30) == 0x00) ? "un" : "", regname);
	for (i = 1; i < sizeof(buf); i++)
		msg_cdbg("Sector %2u is %s%sed.\n", i, (buf[i] == 0x00) ? "un" : "", regname);

	return 0;
}

/* bit 7: busy flag
 * bit 6: memory/buffer compare result
 * bit 5-2: density (encoding see below)
 * bit 1: protection enabled (soft or hard)
 * bit 0: "power of 2" page size indicator (e.g. 1 means 256B; 0 means 264B)
 *
 * 5-2 encoding: bit 2 is always 1, bits 3-5 encode the density as "2^(bits - 1)" in Mb e.g.:
 * AT45DB161D  1011  16Mb */
int spi_prettyprint_status_register_at45db(struct flashctx *flash)
{
	uint8_t status;
	if (at45db_read_status_register(flash, &status) != 0) {
		return 1;
	}

	/* AT45DB321C does not support lockdown or a page size of a power of 2... */
	const bool isAT45DB321C = (strcmp(flash->chip->name, "AT45DB321C") == 0);
	msg_cdbg("Chip status register is 0x%02x\n", status);
	msg_cdbg("Chip status register: Bit 7 / Ready is %sset\n", (status & AT45DB_READY) ? "" : "not ");
	msg_cdbg("Chip status register: Bit 6 / Compare match is %sset\n", (status & AT45DB_CMP) ? "" : "not ");
	spi_prettyprint_status_register_bit(status, 5);
	spi_prettyprint_status_register_bit(status, 4);
	spi_prettyprint_status_register_bit(status, 3);
	spi_prettyprint_status_register_bit(status, 2);
	const uint8_t dens = (status >> 3) & 0x7; /* Bit 2 is always 1, we use the other bits only */
	msg_cdbg("Chip status register: Density is %u Mb\n", 1 << (dens - 1));
	msg_cdbg("Chip status register: Bit 1 / Protection is %sset\n", (status & AT45DB_PROT) ? "" : "not ");

	if (isAT45DB321C)
		spi_prettyprint_status_register_bit(status, 0);
	else
		msg_cdbg("Chip status register: Bit 0 / \"Power of 2\" is %sset\n",
			 (status & AT45DB_POWEROF2) ? "" : "not ");

	if (status & AT45DB_PROT)
		at45db_prettyprint_protection_register(flash, AT45DB_READ_PROTECT, "protect");

	if (!isAT45DB321C)
		at45db_prettyprint_protection_register(flash, AT45DB_READ_LOCKDOWN, "lock");

	return 0;
}

/* Probe function for AT45DB* chips that support multiple page sizes. */
int probe_spi_at45db(struct flashctx *flash)
{
	uint8_t status;
	struct flashchip *chip = flash->chip;

	if (!probe_spi_rdid(flash))
		return 0;

	/* Some AT45DB* chips support two different page sizes each (e.g. 264 and 256 B). In order to tell which
	 * page size this chip has we need to read the status register. */
	if (at45db_read_status_register(flash, &status) != 0)
		return 0;

	/* We assume sane power-of-2 page sizes and adjust the chip attributes in case this is not the case. */
	if ((status & AT45DB_POWEROF2) == 0) {
		chip->total_size = (chip->total_size / 32) * 33;
		chip->page_size = (chip->page_size / 32) * 33;

		unsigned int i, j;
		for (i = 0; i < NUM_ERASEFUNCTIONS; i++) {
			struct block_eraser *eraser = &chip->block_erasers[i];
			for (j = 0; j < NUM_ERASEREGIONS; j++) {
				eraser->eraseblocks[j].size = (eraser->eraseblocks[j].size / 32) * 33;
			}
		}
	}

	switch (chip->page_size) {
	case 256: chip->gran = write_gran_256bytes; break;
	case 264: chip->gran = write_gran_264bytes; break;
	case 512: chip->gran = write_gran_512bytes; break;
	case 528: chip->gran = write_gran_528bytes; break;
	case 1024: chip->gran = write_gran_1024bytes; break;
	case 1056: chip->gran = write_gran_1056bytes; break;
	default:
		msg_cerr("%s: unknown page size %d.\n", __func__, chip->page_size);
		return 0;
	}

	msg_cdbg2("%s: total size %i kB, page size %i B\n", __func__, chip->total_size * 1024, chip->page_size);

	return 1;
}

/* In case of non-power-of-two page sizes we need to convert the address flashrom uses to the address the
 * DataFlash chips use. The latter uses a segmented address space where the page address is encoded in the
 * more significant bits and the offset within the page is encoded in the less significant bits. The exact
 * partition depends on the page size.
 */
static unsigned int at45db_convert_addr(unsigned int addr, unsigned int page_size)
{
	unsigned int page_bits = address_to_bits(page_size - 1);
	unsigned int at45db_addr = ((addr / page_size) << page_bits) | (addr % page_size);
	msg_cspew("%s: addr=0x%x, page_size=%u, page_bits=%u -> at45db_addr=0x%x\n",
		  __func__, addr, page_size, page_bits, at45db_addr);
	return at45db_addr;
}

int spi_read_at45db(struct flashctx *flash, uint8_t *buf, unsigned int addr, unsigned int len)
{
	const unsigned int page_size = flash->chip->page_size;
	const unsigned int total_size = flash->chip->total_size * 1024;
	if ((addr + len) > total_size) {
		msg_cerr("%s: tried to read beyond flash boundary: addr=%u, len=%u, size=%u\n",
			 __func__, addr, len, total_size);
		return 1;
	}

	/* We have to split this up into chunks to fit within the programmer's read size limit, but those
	 * chunks can cross page boundaries. */
	const unsigned int max_data_read = flash->mst->spi.max_data_read;
	const unsigned int max_chunk = (max_data_read > 0) ? max_data_read : page_size;
	while (len > 0) {
		unsigned int chunk = min(max_chunk, len);
		int ret = spi_nbyte_read(flash, at45db_convert_addr(addr, page_size), buf, chunk);
		if (ret) {
			msg_cerr("%s: error sending read command!\n", __func__);
			return ret;
		}
		addr += chunk;
		buf += chunk;
		len -= chunk;
	}

	return 0;
}

/* Legacy continuous read, used where spi_read_at45db() is not available.
 * The first 4 (dummy) bytes read need to be discarded. */
int spi_read_at45db_e8(struct flashctx *flash, uint8_t *buf, unsigned int addr, unsigned int len)
{
	const unsigned int page_size = flash->chip->page_size;
	const unsigned int total_size = flash->chip->total_size * 1024;
	if ((addr + len) > total_size) {
		msg_cerr("%s: tried to read beyond flash boundary: addr=%u, len=%u, size=%u\n",
			 __func__, addr, len, total_size);
		return 1;
	}

	/* We have to split this up into chunks to fit within the programmer's read size limit, but those
	 * chunks can cross page boundaries. */
	const unsigned int max_data_read = flash->mst->spi.max_data_read;
	const unsigned int max_chunk = (max_data_read > 0) ? max_data_read : page_size;
	while (len > 0) {
		const unsigned int addr_at45 = at45db_convert_addr(addr, page_size);
		const unsigned char cmd[] = {
			AT45DB_READ_ARRAY,
			(addr_at45 >> 16) & 0xff,
			(addr_at45 >> 8) & 0xff,
			(addr_at45 >> 0) & 0xff
		};
		/* We need to leave place for 4 dummy bytes and handle them explicitly. */
		unsigned int chunk = min(max_chunk, len + 4);
		uint8_t tmp[chunk];
		int ret = spi_send_command(flash, sizeof(cmd), chunk, cmd, tmp);
		if (ret) {
			msg_cerr("%s: error sending read command!\n", __func__);
			return ret;
		}
		/* Copy result without dummy bytes into buf and advance address counter respectively. */
		memcpy(buf, tmp + 4, chunk - 4);
		addr += chunk - 4;
		buf += chunk - 4;
		len -= chunk - 4;
	}
	return 0;
}

/* Returns 0 when ready, 1 on errors and timeouts. */
static int at45db_wait_ready (struct flashctx *flash, unsigned int us, unsigned int retries)
{
	while (true) {
		uint8_t status;
		int ret = at45db_read_status_register(flash, &status);
		if ((status & AT45DB_READY) == AT45DB_READY)
			return 0;
		if (ret != 0 || retries-- == 0)
			return 1;
		programmer_delay(us);
	}
}

static int at45db_erase(struct flashctx *flash, uint8_t opcode, unsigned int at45db_addr, unsigned int stepsize, unsigned int retries)
{
	const uint8_t cmd[] = {
		opcode,
		(at45db_addr >> 16) & 0xff,
		(at45db_addr >> 8) & 0xff,
		(at45db_addr >> 0) & 0xff
	};

	/* Send erase command. */
	int ret = spi_send_command(flash, sizeof(cmd), 0, cmd, NULL);
	if (ret != 0) {
		msg_cerr("%s: error sending erase command!\n", __func__);
		return ret;
	}

	/* Wait for completion. */
	ret = at45db_wait_ready(flash, stepsize, retries);
	if (ret != 0)
		msg_cerr("%s: chip did not become ready again after sending the erase command!\n", __func__);

	return ret;
}

int spi_erase_at45db_page(struct flashctx *flash, unsigned int addr, unsigned int blocklen)
{
	const unsigned int page_size = flash->chip->page_size;
	const unsigned int total_size = flash->chip->total_size * 1024;

	if ((addr % page_size) != 0 || (blocklen % page_size) != 0) {
		msg_cerr("%s: cannot erase partial pages: addr=%u, blocklen=%u\n", __func__, addr, blocklen);
		return 1;
	}

	if ((addr + blocklen) > total_size) {
		msg_cerr("%s: tried to erase a block beyond flash boundary: addr=%u, blocklen=%u, size=%u\n",
			 __func__, addr, blocklen, total_size);
		return 1;
	}

	/* Needs typically about 35 ms for completion, so let's wait 100 ms in 500 us steps. */
	return at45db_erase(flash, AT45DB_PAGE_ERASE, at45db_convert_addr(addr, page_size), 500, 200);
}

int spi_erase_at45db_block(struct flashctx *flash, unsigned int addr, unsigned int blocklen)
{
	const unsigned int page_size = flash->chip->page_size;
	const unsigned int total_size = flash->chip->total_size * 1024;

	if ((addr % page_size) != 0 || (blocklen % page_size) != 0) { // FIXME: should check blocks not pages
		msg_cerr("%s: cannot erase partial pages: addr=%u, blocklen=%u\n", __func__, addr, blocklen);
		return 1;
	}

	if ((addr + blocklen) > total_size) {
		msg_cerr("%s: tried to erase a block beyond flash boundary: addr=%u, blocklen=%u, size=%u\n",
			 __func__, addr, blocklen, total_size);
		return 1;
	}

	/* Needs typically between 20 and 100 ms for completion, so let's wait 300 ms in 1 ms steps. */
	return at45db_erase(flash, AT45DB_BLOCK_ERASE, at45db_convert_addr(addr, page_size), 1000, 300);
}

int spi_erase_at45db_sector(struct flashctx *flash, unsigned int addr, unsigned int blocklen)
{
	const unsigned int page_size = flash->chip->page_size;
	const unsigned int total_size = flash->chip->total_size * 1024;

	if ((addr % page_size) != 0 || (blocklen % page_size) != 0) { // FIXME: should check sectors not pages
		msg_cerr("%s: cannot erase partial pages: addr=%u, blocklen=%u\n", __func__, addr, blocklen);
		return 1;
	}

	if ((addr + blocklen) > total_size) {
		msg_cerr("%s: tried to erase a sector beyond flash boundary: addr=%u, blocklen=%u, size=%u\n",
			 __func__, addr, blocklen, total_size);
		return 1;
	}

	/* Needs typically about 5 s for completion, so let's wait 20 seconds in 200 ms steps. */
	return at45db_erase(flash, AT45DB_SECTOR_ERASE, at45db_convert_addr(addr, page_size), 200000, 100);
}

int spi_erase_at45db_chip(struct flashctx *flash, unsigned int addr, unsigned int blocklen)
{
	const unsigned int total_size = flash->chip->total_size * 1024;

	if ((addr + blocklen) > total_size) {
		msg_cerr("%s: tried to erase beyond flash boundary: addr=%u, blocklen=%u, size=%u\n",
			 __func__, addr, blocklen, total_size);
		return 1;
	}

	/* Needs typically from about 5 to over 60 s for completion, so let's wait 100 s in 500 ms steps.
	 * NB: the address is not a real address but a magic number. This hack allows to share code. */
	return at45db_erase(flash, AT45DB_CHIP_ERASE, AT45DB_CHIP_ERASE_ADDR, 500000, 200);
}

/* This one is really special and works only for AT45CS1282. It uses two different opcodes depending on the
 * address and has an asymmetric layout. */
int spi_erase_at45cs_sector(struct flashctx *flash, unsigned int addr, unsigned int blocklen)
{
	const unsigned int page_size = flash->chip->page_size;
	const unsigned int total_size = flash->chip->total_size * 1024;
	const struct block_eraser be = flash->chip->block_erasers[0];
	const unsigned int sec_0a_top = be.eraseblocks[0].size;
	const unsigned int sec_0b_top = be.eraseblocks[0].size + be.eraseblocks[1].size;

	if ((addr + blocklen) > total_size) {
		msg_cerr("%s: tried to erase a sector beyond flash boundary: addr=%u, blocklen=%u, size=%u\n",
			 __func__, addr, blocklen, total_size);
		return 1;
	}

	bool partial_range = false;
	uint8_t opcode = 0x7C; /* Used for all but sector 0a. */
	if (addr < sec_0a_top) {
		opcode = 0x50;
		/* One single sector of 8 pages at address 0. */
		if (addr != 0 || blocklen != (8 * page_size))
			partial_range = true;
	} else if (addr < sec_0b_top) {
		/* One single sector of 248 pages adjacent to the first. */
		if (addr != sec_0a_top || blocklen != (248 * page_size))
			partial_range = true;
	} else {
		/* The rest is filled by 63 aligned sectors of 256 pages. */
		if ((addr % (256 * page_size)) != 0 || (blocklen % (256 * page_size)) != 0)
			partial_range = true;
	}
	if (partial_range) {
		msg_cerr("%s: cannot erase partial sectors: addr=%u, blocklen=%u\n", __func__, addr, blocklen);
		return 1;
	}

	/* Needs up to 4 s for completion, so let's wait 20 seconds in 200 ms steps. */
	return at45db_erase(flash, opcode, at45db_convert_addr(addr, page_size), 200000, 100);
}

static int at45db_fill_buffer1(struct flashctx *flash, const uint8_t *bytes, unsigned int off, unsigned int len)
{
	const unsigned int page_size = flash->chip->page_size;
	if ((off + len) > page_size) {
		msg_cerr("Tried to write %u bytes at offset %u into a buffer of only %u B.\n",
			 len, off, page_size);
		return 1;
	}

	/* Create a suitable buffer to store opcode, address and data chunks for buffer1. */
	const unsigned int max_data_write = flash->mst->spi.max_data_write;
	const unsigned int max_chunk = max_data_write > 4 && max_data_write - 4 <= page_size ?
				       max_data_write - 4 : page_size;
	uint8_t buf[4 + max_chunk];

	buf[0] = AT45DB_BUFFER1_WRITE;
	while (off < page_size) {
		unsigned int cur_chunk = min(max_chunk, page_size - off);
		buf[1] = (off >> 16) & 0xff;
		buf[2] = (off >> 8) & 0xff;
		buf[3] = (off >> 0) & 0xff;
		memcpy(&buf[4], bytes + off, cur_chunk);
		int ret = spi_send_command(flash, 4 + cur_chunk, 0, buf, NULL);
		if (ret != 0) {
			msg_cerr("%s: error sending buffer write!\n", __func__);
			return ret;
		}
		off += cur_chunk;
	}
	return 0;
}

static int at45db_commit_buffer1(struct flashctx *flash, unsigned int at45db_addr)
{
	const uint8_t cmd[] = {
		AT45DB_BUFFER1_PAGE_PROGRAM,
		(at45db_addr >> 16) & 0xff,
		(at45db_addr >> 8) & 0xff,
		(at45db_addr >> 0) & 0xff
	};

	/* Send buffer to device. */
	int ret = spi_send_command(flash, sizeof(cmd), 0, cmd, NULL);
	if (ret != 0) {
		msg_cerr("%s: error sending buffer to main memory command!\n", __func__);
		return ret;
	}

	/* Wait for completion (typically a few ms). */
	ret = at45db_wait_ready(flash, 250, 200); // 50 ms
	if (ret != 0) {
		msg_cerr("%s: chip did not become ready again!\n", __func__);
		return ret;
	}

	return 0;
}

static int at45db_program_page(struct flashctx *flash, const uint8_t *buf, unsigned int at45db_addr)
{
	int ret = at45db_fill_buffer1(flash, buf, 0, flash->chip->page_size);
	if (ret != 0) {
		msg_cerr("%s: filling the buffer failed!\n", __func__);
		return ret;
	}

	ret = at45db_commit_buffer1(flash, at45db_addr);
	if (ret != 0) {
		msg_cerr("%s: committing page failed!\n", __func__);
		return ret;
	}

	return 0;
}

int spi_write_at45db(struct flashctx *flash, const uint8_t *buf, unsigned int start, unsigned int len)
{
	const unsigned int page_size = flash->chip->page_size;
	const unsigned int total_size = flash->chip->total_size;

	if ((start % page_size) != 0 || (len % page_size) != 0) {
		msg_cerr("%s: cannot write partial pages: start=%u, len=%u\n", __func__, start, len);
		return 1;
	}

	if ((start + len) > (total_size * 1024)) {
		msg_cerr("%s: tried to write beyond flash boundary: start=%u, len=%u, size=%u\n",
			 __func__, start, len, total_size);
		return 1;
	}

	unsigned int i;
	for (i = 0; i < len; i += page_size) {
		if (at45db_program_page(flash, buf + i, at45db_convert_addr(start + i, page_size)) != 0) {
			msg_cerr("Writing page %u failed!\n", i);
			return 1;
		}
		update_progress(flash, FLASHROM_PROGRESS_WRITE, i + page_size, len);
	}
	return 0;
}