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2023-12-09 95099d4622f8cb224d94e314c7a8e0df60b13f87 
 kernel/drivers/mmc/host/s3cmci.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  *  linux/drivers/mmc/s3cmci.h - Samsung S3C MCI driver
34  *
....@@ -5,10 +6,6 @@
56  *
67  * Current driver maintained by Ben Dooks and Simtec Electronics
78  *  Copyright (C) 2008 Simtec Electronics <ben-linux@fluff.org>
8
- *
9
- * This program is free software; you can redistribute it and/or modify
10
- * it under the terms of the GNU General Public License version 2 as
11
- * published by the Free Software Foundation.
129  */
1310 
1411 #include <linux/module.h>
....@@ -26,13 +23,7 @@
2623 #include <linux/io.h>
2724 #include <linux/of.h>
2825 #include <linux/of_device.h>
29
-#include <linux/of_gpio.h>
3026 #include <linux/mmc/slot-gpio.h>
31
-
32
-#include <plat/gpio-cfg.h>
33
-#include <mach/dma.h>
34
-#include <mach/gpio-samsung.h>
35
-
3627 #include <linux/platform_data/mmc-s3cmci.h>
3728 
3829 #include "s3cmci.h"
....@@ -154,8 +145,8 @@
154145 
155146 static void dbg_dumpregs(struct s3cmci_host *host, char *prefix)
156147 {
157
-	u32 con, pre, cmdarg, cmdcon, cmdsta, r0, r1, r2, r3, timer, bsize;
158
-	u32 datcon, datcnt, datsta, fsta, imask;
148
+	u32 con, pre, cmdarg, cmdcon, cmdsta, r0, r1, r2, r3, timer;
149
+	u32 datcon, datcnt, datsta, fsta;
159150 
160151 	con 	= readl(host->base + S3C2410_SDICON);
161152 	pre 	= readl(host->base + S3C2410_SDIPRE);
....@@ -167,12 +158,10 @@
167158 	r2 	= readl(host->base + S3C2410_SDIRSP2);
168159 	r3 	= readl(host->base + S3C2410_SDIRSP3);
169160 	timer 	= readl(host->base + S3C2410_SDITIMER);
170
-	bsize 	= readl(host->base + S3C2410_SDIBSIZE);
171161 	datcon 	= readl(host->base + S3C2410_SDIDCON);
172162 	datcnt 	= readl(host->base + S3C2410_SDIDCNT);
173163 	datsta 	= readl(host->base + S3C2410_SDIDSTA);
174164 	fsta 	= readl(host->base + S3C2410_SDIFSTA);
175
-	imask   = readl(host->base + host->sdiimsk);
176165 
177166 	dbg(host, dbg_debug, "%s  CON:[%08x]  PRE:[%08x]  TMR:[%08x]\n",
178167 				prefix, con, pre, timer);
....@@ -311,7 +300,8 @@
311300 static void s3cmci_check_sdio_irq(struct s3cmci_host *host)
312301 {
313302 	if (host->sdio_irqen) {
314
-		if (gpio_get_value(S3C2410_GPE(8)) == 0) {
303
+		if (host->pdata->bus[3] &&
304
+		    gpiod_get_value(host->pdata->bus[3]) == 0) {
315305 			pr_debug("%s: signalling irq\n", __func__);
316306 			mmc_signal_sdio_irq(host->mmc);
317307 		}
....@@ -400,9 +390,6 @@
400390 	local_irq_restore(flags);
401391 }
402392 
403
-/**
404
- *
405
- */
406393 static void s3cmci_disable_irq(struct s3cmci_host *host, bool transfer)
407394 {
408395 	unsigned long flags;
....@@ -962,13 +949,6 @@
962949 {
963950 	u32 dcon, imsk, stoptries = 3;
964951 
965
-	/* write DCON register */
966
-
967
-	if (!data) {
968
-		writel(0, host->base + S3C2410_SDIDCON);
969
-		return 0;
970
-	}
971
-
972952 	if ((data->blksz & 3) != 0) {
973953 		/* We cannot deal with unaligned blocks with more than
974954 		 * one block being transferred. */
....@@ -1217,32 +1197,19 @@
12171197 	switch (ios->power_mode) {
12181198 	case MMC_POWER_ON:
12191199 	case MMC_POWER_UP:
1220
-		/* Configure GPE5...GPE10 pins in SD mode */
1221
-		if (!host->pdev->dev.of_node)
1222
-			s3c_gpio_cfgall_range(S3C2410_GPE(5), 6, S3C_GPIO_SFN(2),
1223
-					      S3C_GPIO_PULL_NONE);
1224
-
1225
-		if (host->pdata->set_power)
1226
-			host->pdata->set_power(ios->power_mode, ios->vdd);
1227
-
12281200 		if (!host->is2440)
12291201 			mci_con |= S3C2410_SDICON_FIFORESET;
1230
-
12311202 		break;
12321203 
12331204 	case MMC_POWER_OFF:
12341205 	default:
1235
-		if (!host->pdev->dev.of_node)
1236
-			gpio_direction_output(S3C2410_GPE(5), 0);
1237
-
12381206 		if (host->is2440)
12391207 			mci_con |= S3C2440_SDICON_SDRESET;
1240
-
1241
-		if (host->pdata->set_power)
1242
-			host->pdata->set_power(ios->power_mode, ios->vdd);
1243
-
12441208 		break;
12451209 	}
1210
+
1211
+	if (host->pdata->set_power)
1212
+		host->pdata->set_power(ios->power_mode, ios->vdd);
12461213 
12471214 	s3cmci_set_clk(host, ios);
12481215 
....@@ -1321,13 +1288,6 @@
13211288 	.enable_sdio_irq = s3cmci_enable_sdio_irq,
13221289 };
13231290 
1324
-static struct s3c24xx_mci_pdata s3cmci_def_pdata = {
1325
-	/* This is currently here to avoid a number of if (host->pdata)
1326
-	 * checks. Any zero fields to ensure reasonable defaults are picked. */
1327
-	 .no_wprotect = 1,
1328
-	 .no_detect = 1,
1329
-};
1330
-
13311291 #ifdef CONFIG_ARM_S3C24XX_CPUFREQ
13321292 
13331293 static int s3cmci_cpufreq_transition(struct notifier_block *nb,
....@@ -1390,7 +1350,7 @@
13901350 {
13911351 	struct s3cmci_host *host = seq->private;
13921352 
1393
-	seq_printf(seq, "Register base = 0x%08x\n", (u32)host->base);
1353
+	seq_printf(seq, "Register base = 0x%p\n", host->base);
13941354 	seq_printf(seq, "Clock rate = %ld\n", host->clk_rate);
13951355 	seq_printf(seq, "Prescale = %d\n", host->prescaler);
13961356 	seq_printf(seq, "is2440 = %d\n", host->is2440);
....@@ -1406,18 +1366,7 @@
14061366 	return 0;
14071367 }
14081368 
1409
-static int s3cmci_state_open(struct inode *inode, struct file *file)
1410
-{
1411
-	return single_open(file, s3cmci_state_show, inode->i_private);
1412
-}
1413
-
1414
-static const struct file_operations s3cmci_fops_state = {
1415
-	.owner		= THIS_MODULE,
1416
-	.open		= s3cmci_state_open,
1417
-	.read		= seq_read,
1418
-	.llseek		= seq_lseek,
1419
-	.release	= single_release,
1420
-};
1369
+DEFINE_SHOW_ATTRIBUTE(s3cmci_state);
14211370 
14221371 #define DBG_REG(_r) { .addr = S3C2410_SDI##_r, .name = #_r }
14231372 
....@@ -1459,49 +1408,23 @@
14591408 	return 0;
14601409 }
14611410 
1462
-static int s3cmci_regs_open(struct inode *inode, struct file *file)
1463
-{
1464
-	return single_open(file, s3cmci_regs_show, inode->i_private);
1465
-}
1466
-
1467
-static const struct file_operations s3cmci_fops_regs = {
1468
-	.owner		= THIS_MODULE,
1469
-	.open		= s3cmci_regs_open,
1470
-	.read		= seq_read,
1471
-	.llseek		= seq_lseek,
1472
-	.release	= single_release,
1473
-};
1411
+DEFINE_SHOW_ATTRIBUTE(s3cmci_regs);
14741412 
14751413 static void s3cmci_debugfs_attach(struct s3cmci_host *host)
14761414 {
14771415 	struct device *dev = &host->pdev->dev;
1416
+	struct dentry *root;
14781417 
1479
-	host->debug_root = debugfs_create_dir(dev_name(dev), NULL);
1480
-	if (IS_ERR(host->debug_root)) {
1481
-		dev_err(dev, "failed to create debugfs root\n");
1482
-		return;
1483
-	}
1418
+	root = debugfs_create_dir(dev_name(dev), NULL);
1419
+	host->debug_root = root;
14841420 
1485
-	host->debug_state = debugfs_create_file("state", 0444,
1486
-						host->debug_root, host,
1487
-						&s3cmci_fops_state);
1488
-
1489
-	if (IS_ERR(host->debug_state))
1490
-		dev_err(dev, "failed to create debug state file\n");
1491
-
1492
-	host->debug_regs = debugfs_create_file("regs", 0444,
1493
-					       host->debug_root, host,
1494
-					       &s3cmci_fops_regs);
1495
-
1496
-	if (IS_ERR(host->debug_regs))
1497
-		dev_err(dev, "failed to create debug regs file\n");
1421
+	debugfs_create_file("state", 0444, root, host, &s3cmci_state_fops);
1422
+	debugfs_create_file("regs", 0444, root, host, &s3cmci_regs_fops);
14981423 }
14991424 
15001425 static void s3cmci_debugfs_remove(struct s3cmci_host *host)
15011426 {
1502
-	debugfs_remove(host->debug_regs);
1503
-	debugfs_remove(host->debug_state);
1504
-	debugfs_remove(host->debug_root);
1427
+	debugfs_remove_recursive(host->debug_root);
15051428 }
15061429 
15071430 #else
....@@ -1518,23 +1441,20 @@
15181441 	int i, ret;
15191442 
15201443 	host->is2440 = platform_get_device_id(pdev)->driver_data;
1521
-
1522
-	for (i = S3C2410_GPE(5); i <= S3C2410_GPE(10); i++) {
1523
-		ret = gpio_request(i, dev_name(&pdev->dev));
1524
-		if (ret) {
1525
-			dev_err(&pdev->dev, "failed to get gpio %d\n", i);
1526
-
1527
-			for (i--; i >= S3C2410_GPE(5); i--)
1528
-				gpio_free(i);
1529
-
1530
-			return ret;
1531
-		}
1444
+	pdata = pdev->dev.platform_data;
1445
+	if (!pdata) {
1446
+		dev_err(&pdev->dev, "need platform data");
1447
+		return -ENXIO;
15321448 	}
15331449 
1534
-	if (!pdev->dev.platform_data)
1535
-		pdev->dev.platform_data = &s3cmci_def_pdata;
1536
-
1537
-	pdata = pdev->dev.platform_data;
1450
+	for (i = 0; i < 6; i++) {
1451
+		pdata->bus[i] = devm_gpiod_get_index(&pdev->dev, "bus", i,
1452
+						     GPIOD_OUT_LOW);
1453
+		if (IS_ERR(pdata->bus[i])) {
1454
+			dev_err(&pdev->dev, "failed to get gpio %d\n", i);
1455
+			return PTR_ERR(pdata->bus[i]);
1456
+		}
1457
+	}
15381458 
15391459 	if (pdata->no_wprotect)
15401460 		mmc->caps2 |= MMC_CAP2_NO_WRITE_PROTECT;
....@@ -1545,25 +1465,19 @@
15451465 	if (pdata->wprotect_invert)
15461466 		mmc->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH;
15471467 
1548
-	if (pdata->detect_invert)
1549
-		 mmc->caps2 |= MMC_CAP2_CD_ACTIVE_HIGH;
1550
-
1551
-	if (gpio_is_valid(pdata->gpio_detect)) {
1552
-		ret = mmc_gpio_request_cd(mmc, pdata->gpio_detect, 0);
1553
-		if (ret) {
1554
-			dev_err(&pdev->dev, "error requesting GPIO for CD %d\n",
1555
-				ret);
1556
-			return ret;
1557
-		}
1468
+	/* If we get -ENOENT we have no card detect GPIO line */
1469
+	ret = mmc_gpiod_request_cd(mmc, "cd", 0, false, 0);
1470
+	if (ret != -ENOENT) {
1471
+		dev_err(&pdev->dev, "error requesting GPIO for CD %d\n",
1472
+			ret);
1473
+		return ret;
15581474 	}
15591475 
1560
-	if (gpio_is_valid(pdata->gpio_wprotect)) {
1561
-		ret = mmc_gpio_request_ro(mmc, pdata->gpio_wprotect);
1562
-		if (ret) {
1563
-			dev_err(&pdev->dev, "error requesting GPIO for WP %d\n",
1564
-				ret);
1565
-			return ret;
1566
-		}
1476
+	ret = mmc_gpiod_request_ro(host->mmc, "wp", 0, 0);
1477
+	if (ret != -ENOENT) {
1478
+		dev_err(&pdev->dev, "error requesting GPIO for WP %d\n",
1479
+			ret);
1480
+		return ret;
15671481 	}
15681482 
15691483 	return 0;
....@@ -1576,7 +1490,7 @@
15761490 	struct mmc_host *mmc = host->mmc;
15771491 	int ret;
15781492 
1579
-	host->is2440 = (int) of_device_get_match_data(&pdev->dev);
1493
+	host->is2440 = (long) of_device_get_match_data(&pdev->dev);
15801494 
15811495 	ret = mmc_of_parse(mmc);
15821496 	if (ret)
....@@ -1596,7 +1510,6 @@
15961510 	struct s3cmci_host *host;
15971511 	struct mmc_host	*mmc;
15981512 	int ret;
1599
-	int i;
16001513 
16011514 	mmc = mmc_alloc_host(sizeof(struct s3cmci_host), &pdev->dev);
16021515 	if (!mmc) {
....@@ -1640,7 +1553,7 @@
16401553 			"failed to get io memory region resource.\n");
16411554 
16421555 		ret = -ENOENT;
1643
-		goto probe_free_gpio;
1556
+		goto probe_free_host;
16441557 	}
16451558 
16461559 	host->mem = request_mem_region(host->mem->start,
....@@ -1649,7 +1562,7 @@
16491562 	if (!host->mem) {
16501563 		dev_err(&pdev->dev, "failed to request io memory region.\n");
16511564 		ret = -ENOENT;
1652
-		goto probe_free_gpio;
1565
+		goto probe_free_host;
16531566 	}
16541567 
16551568 	host->base = ioremap(host->mem->start, resource_size(host->mem));
....@@ -1661,7 +1574,6 @@
16611574 
16621575 	host->irq = platform_get_irq(pdev, 0);
16631576 	if (host->irq <= 0) {
1664
-		dev_err(&pdev->dev, "failed to get interrupt resource.\n");
16651577 		ret = -EINVAL;
16661578 		goto probe_iounmap;
16671579 	}
....@@ -1774,11 +1686,6 @@
17741686  probe_free_mem_region:
17751687 	release_mem_region(host->mem->start, resource_size(host->mem));
17761688 
1777
- probe_free_gpio:
1778
-	if (!pdev->dev.of_node)
1779
-		for (i = S3C2410_GPE(5); i <= S3C2410_GPE(10); i++)
1780
-			gpio_free(i);
1781
-
17821689  probe_free_host:
17831690 	mmc_free_host(mmc);
17841691 
....@@ -1804,7 +1711,6 @@
18041711 {
18051712 	struct mmc_host		*mmc  = platform_get_drvdata(pdev);
18061713 	struct s3cmci_host	*host = mmc_priv(mmc);
1807
-	int i;
18081714 
18091715 	s3cmci_shutdown(pdev);
18101716 
....@@ -1816,10 +1722,6 @@
18161722 		dma_release_channel(host->dma);
18171723 
18181724 	free_irq(host->irq, host);
1819
-
1820
-	if (!pdev->dev.of_node)
1821
-		for (i = S3C2410_GPE(5); i <= S3C2410_GPE(10); i++)
1822
-			gpio_free(i);
18231725 
18241726 	iounmap(host->base);
18251727 	release_mem_region(host->mem->start, resource_size(host->mem));