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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c 
 kernel/drivers/mtd/nand/raw/tango_nand.c
....@@ -1,9 +1,6 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * Copyright (C) 2016 Sigma Designs
3
- *
4
- * This program is free software; you can redistribute it and/or
5
- * modify it under the terms of the GNU General Public License
6
- * version 2 as published by the Free Software Foundation.
74  */
85 
96 #include <linux/io.h>
....@@ -116,54 +113,10 @@
116113 
117114 #define TIMING(t0, t1, t2, t3) ((t0) << 24 | (t1) << 16 | (t2) << 8 | (t3))
118115 
119
-static void tango_cmd_ctrl(struct mtd_info *mtd, int dat, unsigned int ctrl)
116
+static void tango_select_target(struct nand_chip *chip, unsigned int cs)
120117 {
121
-	struct tango_chip *tchip = to_tango_chip(mtd_to_nand(mtd));
122
-
123
-	if (ctrl & NAND_CLE)
124
-		writeb_relaxed(dat, tchip->base + PBUS_CMD);
125
-
126
-	if (ctrl & NAND_ALE)
127
-		writeb_relaxed(dat, tchip->base + PBUS_ADDR);
128
-}
129
-
130
-static int tango_dev_ready(struct mtd_info *mtd)
131
-{
132
-	struct nand_chip *chip = mtd_to_nand(mtd);
133
-	struct tango_nfc *nfc = to_tango_nfc(chip->controller);
134
-
135
-	return readl_relaxed(nfc->pbus_base + PBUS_CS_CTRL) & PBUS_IORDY;
136
-}
137
-
138
-static u8 tango_read_byte(struct mtd_info *mtd)
139
-{
140
-	struct tango_chip *tchip = to_tango_chip(mtd_to_nand(mtd));
141
-
142
-	return readb_relaxed(tchip->base + PBUS_DATA);
143
-}
144
-
145
-static void tango_read_buf(struct mtd_info *mtd, u8 *buf, int len)
146
-{
147
-	struct tango_chip *tchip = to_tango_chip(mtd_to_nand(mtd));
148
-
149
-	ioread8_rep(tchip->base + PBUS_DATA, buf, len);
150
-}
151
-
152
-static void tango_write_buf(struct mtd_info *mtd, const u8 *buf, int len)
153
-{
154
-	struct tango_chip *tchip = to_tango_chip(mtd_to_nand(mtd));
155
-
156
-	iowrite8_rep(tchip->base + PBUS_DATA, buf, len);
157
-}
158
-
159
-static void tango_select_chip(struct mtd_info *mtd, int idx)
160
-{
161
-	struct nand_chip *chip = mtd_to_nand(mtd);
162118 	struct tango_nfc *nfc = to_tango_nfc(chip->controller);
163119 	struct tango_chip *tchip = to_tango_chip(chip);
164
-
165
-	if (idx < 0)
166
-		return; /* No "chip unselect" function */
167120 
168121 	writel_relaxed(tchip->timing1, nfc->reg_base + NFC_TIMING1);
169122 	writel_relaxed(tchip->timing2, nfc->reg_base + NFC_TIMING2);
....@@ -171,6 +124,69 @@
171124 	writel_relaxed(tchip->pkt_0_cfg, nfc->reg_base + NFC_PKT_0_CFG);
172125 	writel_relaxed(tchip->pkt_n_cfg, nfc->reg_base + NFC_PKT_N_CFG);
173126 	writel_relaxed(tchip->bb_cfg, nfc->reg_base + NFC_BB_CFG);
127
+}
128
+
129
+static int tango_waitrdy(struct nand_chip *chip, unsigned int timeout_ms)
130
+{
131
+	struct tango_nfc *nfc = to_tango_nfc(chip->controller);
132
+	u32 status;
133
+
134
+	return readl_relaxed_poll_timeout(nfc->pbus_base + PBUS_CS_CTRL,
135
+					  status, status & PBUS_IORDY, 20,
136
+					  timeout_ms);
137
+}
138
+
139
+static int tango_exec_instr(struct nand_chip *chip,
140
+			    const struct nand_op_instr *instr)
141
+{
142
+	struct tango_chip *tchip = to_tango_chip(chip);
143
+	unsigned int i;
144
+
145
+	switch (instr->type) {
146
+	case NAND_OP_CMD_INSTR:
147
+		writeb_relaxed(instr->ctx.cmd.opcode, tchip->base + PBUS_CMD);
148
+		return 0;
149
+	case NAND_OP_ADDR_INSTR:
150
+		for (i = 0; i < instr->ctx.addr.naddrs; i++)
151
+			writeb_relaxed(instr->ctx.addr.addrs[i],
152
+				       tchip->base + PBUS_ADDR);
153
+		return 0;
154
+	case NAND_OP_DATA_IN_INSTR:
155
+		ioread8_rep(tchip->base + PBUS_DATA, instr->ctx.data.buf.in,
156
+			    instr->ctx.data.len);
157
+		return 0;
158
+	case NAND_OP_DATA_OUT_INSTR:
159
+		iowrite8_rep(tchip->base + PBUS_DATA, instr->ctx.data.buf.out,
160
+			     instr->ctx.data.len);
161
+		return 0;
162
+	case NAND_OP_WAITRDY_INSTR:
163
+		return tango_waitrdy(chip,
164
+				     instr->ctx.waitrdy.timeout_ms);
165
+	default:
166
+		break;
167
+	}
168
+
169
+	return -EINVAL;
170
+}
171
+
172
+static int tango_exec_op(struct nand_chip *chip,
173
+			 const struct nand_operation *op,
174
+			 bool check_only)
175
+{
176
+	unsigned int i;
177
+	int ret = 0;
178
+
179
+	if (check_only)
180
+		return 0;
181
+
182
+	tango_select_target(chip, op->cs);
183
+	for (i = 0; i < op->ninstrs; i++) {
184
+		ret = tango_exec_instr(chip, &op->instrs[i]);
185
+		if (ret)
186
+			break;
187
+	}
188
+
189
+	return ret;
174190 }
175191 
176192 /*
....@@ -277,14 +293,16 @@
277293 	return err;
278294 }
279295 
280
-static int tango_read_page(struct mtd_info *mtd, struct nand_chip *chip,
281
-			   u8 *buf, int oob_required, int page)
296
+static int tango_read_page(struct nand_chip *chip, u8 *buf,
297
+			   int oob_required, int page)
282298 {
299
+	struct mtd_info *mtd = nand_to_mtd(chip);
283300 	struct tango_nfc *nfc = to_tango_nfc(chip->controller);
284301 	int err, res, len = mtd->writesize;
285302 
303
+	tango_select_target(chip, chip->cur_cs);
286304 	if (oob_required)
287
-		chip->ecc.read_oob(mtd, chip, page);
305
+		chip->ecc.read_oob(chip, page);
288306 
289307 	err = do_dma(nfc, DMA_FROM_DEVICE, NFC_READ, buf, len, page);
290308 	if (err)
....@@ -292,61 +310,70 @@
292310 
293311 	res = decode_error_report(chip);
294312 	if (res < 0) {
295
-		chip->ecc.read_oob_raw(mtd, chip, page);
313
+		chip->ecc.read_oob_raw(chip, page);
296314 		res = check_erased_page(chip, buf);
297315 	}
298316 
299317 	return res;
300318 }
301319 
302
-static int tango_write_page(struct mtd_info *mtd, struct nand_chip *chip,
303
-			    const u8 *buf, int oob_required, int page)
320
+static int tango_write_page(struct nand_chip *chip, const u8 *buf,
321
+			    int oob_required, int page)
304322 {
323
+	struct mtd_info *mtd = nand_to_mtd(chip);
305324 	struct tango_nfc *nfc = to_tango_nfc(chip->controller);
306
-	int err, status, len = mtd->writesize;
325
+	const struct nand_sdr_timings *timings;
326
+	int err, len = mtd->writesize;
327
+	u8 status;
307328 
308329 	/* Calling tango_write_oob() would send PAGEPROG twice */
309330 	if (oob_required)
310331 		return -ENOTSUPP;
311332 
333
+	tango_select_target(chip, chip->cur_cs);
312334 	writel_relaxed(0xffffffff, nfc->mem_base + METADATA);
313335 	err = do_dma(nfc, DMA_TO_DEVICE, NFC_WRITE, buf, len, page);
314336 	if (err)
315337 		return err;
316338 
317
-	status = chip->waitfunc(mtd, chip);
318
-	if (status & NAND_STATUS_FAIL)
319
-		return -EIO;
339
+	timings = nand_get_sdr_timings(nand_get_interface_config(chip));
340
+	err = tango_waitrdy(chip, PSEC_TO_MSEC(timings->tR_max));
341
+	if (err)
342
+		return err;
320343 
321
-	return 0;
344
+	err = nand_status_op(chip, &status);
345
+	if (err)
346
+		return err;
347
+
348
+	return (status & NAND_STATUS_FAIL) ? -EIO : 0;
322349 }
323350 
324351 static void aux_read(struct nand_chip *chip, u8 **buf, int len, int *pos)
325352 {
326
-	struct mtd_info *mtd = nand_to_mtd(chip);
327
-
328353 	*pos += len;
329354 
330355 	if (!*buf) {
331356 		/* skip over "len" bytes */
332357 		nand_change_read_column_op(chip, *pos, NULL, 0, false);
333358 	} else {
334
-		tango_read_buf(mtd, *buf, len);
359
+		struct tango_chip *tchip = to_tango_chip(chip);
360
+
361
+		ioread8_rep(tchip->base + PBUS_DATA, *buf, len);
335362 		*buf += len;
336363 	}
337364 }
338365 
339366 static void aux_write(struct nand_chip *chip, const u8 **buf, int len, int *pos)
340367 {
341
-	struct mtd_info *mtd = nand_to_mtd(chip);
342
-
343368 	*pos += len;
344369 
345370 	if (!*buf) {
346371 		/* skip over "len" bytes */
347372 		nand_change_write_column_op(chip, *pos, NULL, 0, false);
348373 	} else {
349
-		tango_write_buf(mtd, *buf, len);
374
+		struct tango_chip *tchip = to_tango_chip(chip);
375
+
376
+		iowrite8_rep(tchip->base + PBUS_DATA, *buf, len);
350377 		*buf += len;
351378 	}
352379 }
....@@ -424,33 +451,35 @@
424451 	aux_write(chip, &oob, ecc_size, &pos);
425452 }
426453 
427
-static int tango_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
428
-			       u8 *buf, int oob_required, int page)
454
+static int tango_read_page_raw(struct nand_chip *chip, u8 *buf,
455
+			       int oob_required, int page)
429456 {
457
+	tango_select_target(chip, chip->cur_cs);
430458 	nand_read_page_op(chip, page, 0, NULL, 0);
431459 	raw_read(chip, buf, chip->oob_poi);
432460 	return 0;
433461 }
434462 
435
-static int tango_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
436
-				const u8 *buf, int oob_required, int page)
463
+static int tango_write_page_raw(struct nand_chip *chip, const u8 *buf,
464
+				int oob_required, int page)
437465 {
466
+	tango_select_target(chip, chip->cur_cs);
438467 	nand_prog_page_begin_op(chip, page, 0, NULL, 0);
439468 	raw_write(chip, buf, chip->oob_poi);
440469 	return nand_prog_page_end_op(chip);
441470 }
442471 
443
-static int tango_read_oob(struct mtd_info *mtd, struct nand_chip *chip,
444
-			  int page)
472
+static int tango_read_oob(struct nand_chip *chip, int page)
445473 {
474
+	tango_select_target(chip, chip->cur_cs);
446475 	nand_read_page_op(chip, page, 0, NULL, 0);
447476 	raw_read(chip, NULL, chip->oob_poi);
448477 	return 0;
449478 }
450479 
451
-static int tango_write_oob(struct mtd_info *mtd, struct nand_chip *chip,
452
-			   int page)
480
+static int tango_write_oob(struct nand_chip *chip, int page)
453481 {
482
+	tango_select_target(chip, chip->cur_cs);
454483 	nand_prog_page_begin_op(chip, page, 0, NULL, 0);
455484 	raw_write(chip, NULL, chip->oob_poi);
456485 	return nand_prog_page_end_op(chip);
....@@ -485,11 +514,10 @@
485514 	return DIV_ROUND_UP_ULL((u64)kHz * ps, NSEC_PER_SEC);
486515 }
487516 
488
-static int tango_set_timings(struct mtd_info *mtd, int csline,
489
-			     const struct nand_data_interface *conf)
517
+static int tango_set_timings(struct nand_chip *chip, int csline,
518
+			     const struct nand_interface_config *conf)
490519 {
491520 	const struct nand_sdr_timings *sdr = nand_get_sdr_timings(conf);
492
-	struct nand_chip *chip = mtd_to_nand(mtd);
493521 	struct tango_nfc *nfc = to_tango_nfc(chip->controller);
494522 	struct tango_chip *tchip = to_tango_chip(chip);
495523 	u32 Trdy, Textw, Twc, Twpw, Tacc, Thold, Trpw, Textr;
....@@ -521,8 +549,8 @@
521549 {
522550 	struct nand_ecc_ctrl *ecc = &chip->ecc;
523551 
524
-	ecc->mode = NAND_ECC_HW;
525
-	ecc->algo = NAND_ECC_BCH;
552
+	ecc->engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST;
553
+	ecc->algo = NAND_ECC_ALGO_BCH;
526554 	ecc->bytes = DIV_ROUND_UP(ecc->strength * FIELD_ORDER, BITS_PER_BYTE);
527555 
528556 	ecc->read_page_raw = tango_read_page_raw;
....@@ -537,6 +565,8 @@
537565 
538566 static const struct nand_controller_ops tango_controller_ops = {
539567 	.attach_chip = tango_attach_chip,
568
+	.setup_interface = tango_set_timings,
569
+	.exec_op = tango_exec_op,
540570 };
541571 
542572 static int chip_init(struct device *dev, struct device_node *np)
....@@ -571,14 +601,7 @@
571601 	ecc = &chip->ecc;
572602 	mtd = nand_to_mtd(chip);
573603 
574
-	chip->read_byte = tango_read_byte;
575
-	chip->write_buf = tango_write_buf;
576
-	chip->read_buf = tango_read_buf;
577
-	chip->select_chip = tango_select_chip;
578
-	chip->cmd_ctrl = tango_cmd_ctrl;
579
-	chip->dev_ready = tango_dev_ready;
580
-	chip->setup_data_interface = tango_set_timings;
581
-	chip->options = NAND_USE_BOUNCE_BUFFER |
604
+	chip->options = NAND_USES_DMA |
582605 			NAND_NO_SUBPAGE_WRITE |
583606 			NAND_WAIT_TCCS;
584607 	chip->controller = &nfc->hw;
....@@ -610,14 +633,19 @@
610633 
611634 static int tango_nand_remove(struct platform_device *pdev)
612635 {
613
-	int cs;
614636 	struct tango_nfc *nfc = platform_get_drvdata(pdev);
637
+	struct nand_chip *chip;
638
+	int cs, ret;
615639 
616640 	dma_release_channel(nfc->chan);
617641 
618642 	for (cs = 0; cs < MAX_CS; ++cs) {
619
-		if (nfc->chips[cs])
620
-			nand_release(&nfc->chips[cs]->nand_chip);
643
+		if (nfc->chips[cs]) {
644
+			chip = &nfc->chips[cs]->nand_chip;
645
+			ret = mtd_device_unregister(nand_to_mtd(chip));
646
+			WARN_ON(ret);
647
+			nand_cleanup(chip);
648
+		}
621649 	}
622650 
623651 	return 0;
....@@ -669,6 +697,7 @@
669697 		err = chip_init(&pdev->dev, np);
670698 		if (err) {
671699 			tango_nand_remove(pdev);
700
+			of_node_put(np);
672701 			return err;
673702 		}
674703 	}