23  * nand_read_byte - [DEFAULT] read one byte from the chip
24  * @chip: NAND chip object
28 static uint8_t nand_read_byte(struct nand_chip *chip)  in nand_read_byte()  argument
30 	return readb(chip->legacy.IO_ADDR_R);  in nand_read_byte()
34  * nand_read_byte16 - [DEFAULT] read one byte endianness aware from the chip
35  * @chip: NAND chip object
40 static uint8_t nand_read_byte16(struct nand_chip *chip)  in nand_read_byte16()  argument
42 	return (uint8_t) cpu_to_le16(readw(chip->legacy.IO_ADDR_R));  in nand_read_byte16()
47  * @chip: NAND chip object
50  * Default select function for 1 chip devices.
52 static void nand_select_chip(struct nand_chip *chip, int chipnr)  in nand_select_chip()  argument
56 		chip->legacy.cmd_ctrl(chip, NAND_CMD_NONE,  in nand_select_chip()
68  * nand_write_byte - [DEFAULT] write single byte to chip
69  * @chip: NAND chip object
74 static void nand_write_byte(struct nand_chip *chip, uint8_t byte)  in nand_write_byte()  argument
76 	chip->legacy.write_buf(chip, &byte, 1);  in nand_write_byte()
80  * nand_write_byte16 - [DEFAULT] write single byte to a chip with width 16
81  * @chip: NAND chip object
84  * Default function to write a byte to I/O[7:0] on a 16-bit wide chip.
86 static void nand_write_byte16(struct nand_chip *chip, uint8_t byte)  in nand_write_byte16()  argument
106 	chip->legacy.write_buf(chip, (uint8_t *)&word, 2);  in nand_write_byte16()
110  * nand_write_buf - [DEFAULT] write buffer to chip
111  * @chip: NAND chip object
117 static void nand_write_buf(struct nand_chip *chip, const uint8_t *buf, int len)  in nand_write_buf()  argument
119 	iowrite8_rep(chip->legacy.IO_ADDR_W, buf, len);  in nand_write_buf()
123  * nand_read_buf - [DEFAULT] read chip data into buffer
124  * @chip: NAND chip object
130 static void nand_read_buf(struct nand_chip *chip, uint8_t *buf, int len)  in nand_read_buf()  argument
132 	ioread8_rep(chip->legacy.IO_ADDR_R, buf, len);  in nand_read_buf()
136  * nand_write_buf16 - [DEFAULT] write buffer to chip
137  * @chip: NAND chip object
143 static void nand_write_buf16(struct nand_chip *chip, const uint8_t *buf,  in nand_write_buf16()  argument
148 	iowrite16_rep(chip->legacy.IO_ADDR_W, p, len >> 1);  in nand_write_buf16()
152  * nand_read_buf16 - [DEFAULT] read chip data into buffer
153  * @chip: NAND chip object
159 static void nand_read_buf16(struct nand_chip *chip, uint8_t *buf, int len)  in nand_read_buf16()  argument
163 	ioread16_rep(chip->legacy.IO_ADDR_R, p, len >> 1);  in nand_read_buf16()
168  * @chip: NAND chip object
174 static void panic_nand_wait_ready(struct nand_chip *chip, unsigned long timeo)  in panic_nand_wait_ready()  argument
180 		if (chip->legacy.dev_ready(chip))  in panic_nand_wait_ready()
189  * @chip: NAND chip object
193 void nand_wait_ready(struct nand_chip *chip)  in nand_wait_ready()  argument
198 		return panic_nand_wait_ready(chip, timeo);  in nand_wait_ready()
203 		if (chip->legacy.dev_ready(chip))  in nand_wait_ready()
208 	if (!chip->legacy.dev_ready(chip))  in nand_wait_ready()
209 		pr_warn_ratelimited("timeout while waiting for chip to become ready\n");  in nand_wait_ready()
215  * @chip: NAND chip object
220 static void nand_wait_status_ready(struct nand_chip *chip, unsigned long timeo)  in nand_wait_status_ready()  argument
228 		ret = nand_read_data_op(chip, &status, sizeof(status), true);  in nand_wait_status_ready()
240  * @chip: NAND chip object
248 static void nand_command(struct nand_chip *chip, unsigned int command,  in nand_command()  argument
251 	struct mtd_info *mtd = nand_to_mtd(chip);  in nand_command()
269 		chip->legacy.cmd_ctrl(chip, readcmd, ctrl);  in nand_command()
273 		chip->legacy.cmd_ctrl(chip, command, ctrl);  in nand_command()
280 		if (chip->options & NAND_BUSWIDTH_16 &&  in nand_command()
283 		chip->legacy.cmd_ctrl(chip, column, ctrl);  in nand_command()
287 		chip->legacy.cmd_ctrl(chip, page_addr, ctrl);  in nand_command()
289 		chip->legacy.cmd_ctrl(chip, page_addr >> 8, ctrl);  in nand_command()
290 		if (chip->options & NAND_ROW_ADDR_3)  in nand_command()
291 			chip->legacy.cmd_ctrl(chip, page_addr >> 16, ctrl);  in nand_command()
293 	chip->legacy.cmd_ctrl(chip, NAND_CMD_NONE,  in nand_command()
313 		if (chip->legacy.dev_ready)  in nand_command()
315 		udelay(chip->legacy.chip_delay);  in nand_command()
316 		chip->legacy.cmd_ctrl(chip, NAND_CMD_STATUS,  in nand_command()
318 		chip->legacy.cmd_ctrl(chip, NAND_CMD_NONE,  in nand_command()
321 		nand_wait_status_ready(chip, 250);  in nand_command()
341 		if (!chip->legacy.dev_ready) {  in nand_command()
342 			udelay(chip->legacy.chip_delay);  in nand_command()
352 	nand_wait_ready(chip);  in nand_command()
355 static void nand_ccs_delay(struct nand_chip *chip)  in nand_ccs_delay()  argument
361 	if (!(chip->options & NAND_WAIT_TCCS))  in nand_ccs_delay()
368 	if (nand_has_setup_data_iface(chip))  in nand_ccs_delay()
369 		ndelay(chip->data_interface.timings.sdr.tCCS_min / 1000);  in nand_ccs_delay()
376  * @chip: NAND chip object
385 static void nand_command_lp(struct nand_chip *chip, unsigned int command,  in nand_command_lp()  argument
388 	struct mtd_info *mtd = nand_to_mtd(chip);  in nand_command_lp()
398 		chip->legacy.cmd_ctrl(chip, command,  in nand_command_lp()
407 			if (chip->options & NAND_BUSWIDTH_16 &&  in nand_command_lp()
410 			chip->legacy.cmd_ctrl(chip, column, ctrl);  in nand_command_lp()
415 				chip->legacy.cmd_ctrl(chip, column >> 8, ctrl);  in nand_command_lp()
418 			chip->legacy.cmd_ctrl(chip, page_addr, ctrl);  in nand_command_lp()
419 			chip->legacy.cmd_ctrl(chip, page_addr >> 8,  in nand_command_lp()
421 			if (chip->options & NAND_ROW_ADDR_3)  in nand_command_lp()
422 				chip->legacy.cmd_ctrl(chip, page_addr >> 16,  in nand_command_lp()
426 	chip->legacy.cmd_ctrl(chip, NAND_CMD_NONE,  in nand_command_lp()
447 		nand_ccs_delay(chip);  in nand_command_lp()
451 		if (chip->legacy.dev_ready)  in nand_command_lp()
453 		udelay(chip->legacy.chip_delay);  in nand_command_lp()
454 		chip->legacy.cmd_ctrl(chip, NAND_CMD_STATUS,  in nand_command_lp()
456 		chip->legacy.cmd_ctrl(chip, NAND_CMD_NONE,  in nand_command_lp()
459 		nand_wait_status_ready(chip, 250);  in nand_command_lp()
464 		chip->legacy.cmd_ctrl(chip, NAND_CMD_RNDOUTSTART,  in nand_command_lp()
466 		chip->legacy.cmd_ctrl(chip, NAND_CMD_NONE,  in nand_command_lp()
469 		nand_ccs_delay(chip);  in nand_command_lp()
482 		chip->legacy.cmd_ctrl(chip, NAND_CMD_READSTART,  in nand_command_lp()
484 		chip->legacy.cmd_ctrl(chip, NAND_CMD_NONE,  in nand_command_lp()
493 		if (!chip->legacy.dev_ready) {  in nand_command_lp()
494 			udelay(chip->legacy.chip_delay);  in nand_command_lp()
505 	nand_wait_ready(chip);  in nand_command_lp()
510  * @chip: nand chip info structure
517 int nand_get_set_features_notsupp(struct nand_chip *chip, int addr,  in nand_get_set_features_notsupp()  argument
526  * @chip: NAND chip structure
530 static int nand_wait(struct nand_chip *chip)  in nand_wait()  argument
543 	ret = nand_status_op(chip, NULL);  in nand_wait()
548 		panic_nand_wait(chip, timeo);  in nand_wait()
552 			if (chip->legacy.dev_ready) {  in nand_wait()
553 				if (chip->legacy.dev_ready(chip))  in nand_wait()
556 				ret = nand_read_data_op(chip, &status,  in nand_wait()
568 	ret = nand_read_data_op(chip, &status, sizeof(status), true);  in nand_wait()
577 void nand_legacy_set_defaults(struct nand_chip *chip)  in nand_legacy_set_defaults()  argument
579 	unsigned int busw = chip->options & NAND_BUSWIDTH_16;  in nand_legacy_set_defaults()
581 	if (nand_has_exec_op(chip))  in nand_legacy_set_defaults()
585 	if (!chip->legacy.chip_delay)  in nand_legacy_set_defaults()
586 		chip->legacy.chip_delay = 20;  in nand_legacy_set_defaults()
589 	if (!chip->legacy.cmdfunc)  in nand_legacy_set_defaults()
590 		chip->legacy.cmdfunc = nand_command;  in nand_legacy_set_defaults()
593 	if (chip->legacy.waitfunc == NULL)  in nand_legacy_set_defaults()
594 		chip->legacy.waitfunc = nand_wait;  in nand_legacy_set_defaults()
596 	if (!chip->legacy.select_chip)  in nand_legacy_set_defaults()
597 		chip->legacy.select_chip = nand_select_chip;  in nand_legacy_set_defaults()
600 	if (!chip->legacy.read_byte || chip->legacy.read_byte == nand_read_byte)  in nand_legacy_set_defaults()
601 		chip->legacy.read_byte = busw ? nand_read_byte16 : nand_read_byte;  in nand_legacy_set_defaults()
602 	if (!chip->legacy.write_buf || chip->legacy.write_buf == nand_write_buf)  in nand_legacy_set_defaults()
603 		chip->legacy.write_buf = busw ? nand_write_buf16 : nand_write_buf;  in nand_legacy_set_defaults()
604 	if (!chip->legacy.write_byte || chip->legacy.write_byte == nand_write_byte)  in nand_legacy_set_defaults()
605 		chip->legacy.write_byte = busw ? nand_write_byte16 : nand_write_byte;  in nand_legacy_set_defaults()
606 	if (!chip->legacy.read_buf || chip->legacy.read_buf == nand_read_buf)  in nand_legacy_set_defaults()
607 		chip->legacy.read_buf = busw ? nand_read_buf16 : nand_read_buf;  in nand_legacy_set_defaults()
610 void nand_legacy_adjust_cmdfunc(struct nand_chip *chip)  in nand_legacy_adjust_cmdfunc()  argument
612 	struct mtd_info *mtd = nand_to_mtd(chip);  in nand_legacy_adjust_cmdfunc()
615 	if (mtd->writesize > 512 && chip->legacy.cmdfunc == nand_command)  in nand_legacy_adjust_cmdfunc()
616 		chip->legacy.cmdfunc = nand_command_lp;  in nand_legacy_adjust_cmdfunc()
619 int nand_legacy_check_hooks(struct nand_chip *chip)  in nand_legacy_check_hooks()  argument
625 	if (nand_has_exec_op(chip))  in nand_legacy_check_hooks()
633 	if ((!chip->legacy.cmdfunc || !chip->legacy.select_chip) &&  in nand_legacy_check_hooks()
634 	    !chip->legacy.cmd_ctrl) {  in nand_legacy_check_hooks()