forked from ~ljy/RK356X_SDK_RELEASE
blame | history | patch | commit | commitdiff
hc
2023-12-09 95099d4622f8cb224d94e314c7a8e0df60b13f87 
 kernel/drivers/mmc/host/usdhi6rol0.c
....@@ -1,10 +1,7 @@
1
+// SPDX-License-Identifier: GPL-2.0
12 /*
23  * Copyright (C) 2013-2014 Renesas Electronics Europe Ltd.
34  * Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
4
- *
5
- * This program is free software; you can redistribute it and/or modify
6
- * it under the terms of version 2 of the GNU General Public License as
7
- * published by the Free Software Foundation.
85  */
96 
107 #include <linux/clk.h>
....@@ -139,6 +136,8 @@
139136 
140137 #define USDHI6_MIN_DMA 64
141138 
139
+#define USDHI6_REQ_TIMEOUT_MS 4000
140
+
142141 enum usdhi6_wait_for {
143142 	USDHI6_WAIT_FOR_REQUEST,
144143 	USDHI6_WAIT_FOR_CMD,
....@@ -202,7 +201,6 @@
202201 
203202 	/* Pin control */
204203 	struct pinctrl *pinctrl;
205
-	struct pinctrl_state *pins_default;
206204 	struct pinctrl_state *pins_uhs;
207205 };
208206 
....@@ -680,12 +678,14 @@
680678 	};
681679 	int ret;
682680 
683
-	host->chan_tx = dma_request_slave_channel(mmc_dev(host->mmc), "tx");
681
+	host->chan_tx = dma_request_chan(mmc_dev(host->mmc), "tx");
684682 	dev_dbg(mmc_dev(host->mmc), "%s: TX: got channel %p\n", __func__,
685683 		host->chan_tx);
686684 
687
-	if (!host->chan_tx)
685
+	if (IS_ERR(host->chan_tx)) {
686
+		host->chan_tx = NULL;
688687 		return;
688
+	}
689689 
690690 	cfg.direction = DMA_MEM_TO_DEV;
691691 	cfg.dst_addr = start + USDHI6_SD_BUF0;
....@@ -695,12 +695,14 @@
695695 	if (ret < 0)
696696 		goto e_release_tx;
697697 
698
-	host->chan_rx = dma_request_slave_channel(mmc_dev(host->mmc), "rx");
698
+	host->chan_rx = dma_request_chan(mmc_dev(host->mmc), "rx");
699699 	dev_dbg(mmc_dev(host->mmc), "%s: RX: got channel %p\n", __func__,
700700 		host->chan_rx);
701701 
702
-	if (!host->chan_rx)
702
+	if (IS_ERR(host->chan_rx)) {
703
+		host->chan_rx = NULL;
703704 		goto e_release_tx;
705
+	}
704706 
705707 	cfg.direction = DMA_DEV_TO_MEM;
706708 	cfg.src_addr = cfg.dst_addr;
....@@ -1165,8 +1167,7 @@
11651167 					    host->pins_uhs);
11661168 
11671169 	default:
1168
-		return pinctrl_select_state(host->pinctrl,
1169
-					    host->pins_default);
1170
+		return pinctrl_select_default_state(mmc_dev(host->mmc));
11701171 	}
11711172 }
11721173 
....@@ -1342,7 +1343,7 @@
13421343 			host->wait = USDHI6_WAIT_FOR_STOP;
13431344 			return 0;
13441345 		}
1345
-		/* Unsupported STOP command */
1346
+		fallthrough;	/* Unsupported STOP command */
13461347 	default:
13471348 		dev_err(mmc_dev(host->mmc),
13481349 			"unsupported stop CMD%d for CMD%d\n",
....@@ -1690,7 +1691,7 @@
16901691 	switch (host->wait) {
16911692 	default:
16921693 		dev_err(mmc_dev(host->mmc), "Invalid state %u\n", host->wait);
1693
-		/* mrq can be NULL in this actually impossible case */
1694
+		fallthrough;	/* mrq can be NULL, but is impossible */
16941695 	case USDHI6_WAIT_FOR_CMD:
16951696 		usdhi6_error_code(host);
16961697 		if (mrq)
....@@ -1712,10 +1713,7 @@
17121713 			host->offset, data->blocks, data->blksz, data->sg_len,
17131714 			sg_dma_len(sg), sg->offset);
17141715 		usdhi6_sg_unmap(host, true);
1715
-		/*
1716
-		 * If USDHI6_WAIT_FOR_DATA_END times out, we have already unmapped
1717
-		 * the page
1718
-		 */
1716
+		fallthrough;	/* page unmapped in USDHI6_WAIT_FOR_DATA_END */
17191717 	case USDHI6_WAIT_FOR_DATA_END:
17201718 		usdhi6_error_code(host);
17211719 		data->error = -ETIMEDOUT;
....@@ -1767,7 +1765,12 @@
17671765 	host		= mmc_priv(mmc);
17681766 	host->mmc	= mmc;
17691767 	host->wait	= USDHI6_WAIT_FOR_REQUEST;
1770
-	host->timeout	= msecs_to_jiffies(4000);
1768
+	host->timeout	= msecs_to_jiffies(USDHI6_REQ_TIMEOUT_MS);
1769
+	/*
1770
+	 * We use a fixed timeout of 4s, hence inform the core about it. A
1771
+	 * future improvement should instead respect the cmd->busy_timeout.
1772
+	 */
1773
+	mmc->max_busy_timeout = USDHI6_REQ_TIMEOUT_MS;
17711774 
17721775 	host->pinctrl = devm_pinctrl_get(&pdev->dev);
17731776 	if (IS_ERR(host->pinctrl)) {
....@@ -1776,17 +1779,6 @@
17761779 	}
17771780 
17781781 	host->pins_uhs = pinctrl_lookup_state(host->pinctrl, "state_uhs");
1779
-	if (!IS_ERR(host->pins_uhs)) {
1780
-		host->pins_default = pinctrl_lookup_state(host->pinctrl,
1781
-							  PINCTRL_STATE_DEFAULT);
1782
-
1783
-		if (IS_ERR(host->pins_default)) {
1784
-			dev_err(dev,
1785
-				"UHS pinctrl requires a default pin state.\n");
1786
-			ret = PTR_ERR(host->pins_default);
1787
-			goto e_free_mmc;
1788
-		}
1789
-	}
17901782 
17911783 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
17921784 	host->base = devm_ioremap_resource(dev, res);
....@@ -1901,6 +1893,7 @@
19011893 	.remove		= usdhi6_remove,
19021894 	.driver		= {
19031895 		.name	= "usdhi6rol0",
1896
+		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
19041897 		.of_match_table = usdhi6_of_match,
19051898 	},
19061899 };