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2023-12-09 95099d4622f8cb224d94e314c7a8e0df60b13f87 
 kernel/drivers/mmc/host/renesas_sdhi_sys_dmac.c
....@@ -1,14 +1,11 @@
1
+// SPDX-License-Identifier: GPL-2.0
12 /*
23  * DMA support use of SYS DMAC with SDHI SD/SDIO controller
34  *
4
- * Copyright (C) 2016-17 Renesas Electronics Corporation
5
- * Copyright (C) 2016-17 Sang Engineering, Wolfram Sang
5
+ * Copyright (C) 2016-19 Renesas Electronics Corporation
6
+ * Copyright (C) 2016-19 Sang Engineering, Wolfram Sang
67  * Copyright (C) 2017 Horms Solutions, Simon Horman
78  * Copyright (C) 2010-2011 Guennadi Liakhovetski
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/device.h>
....@@ -68,40 +65,7 @@
6865 	.scc_offset	= 0x0300,
6966 	.taps		= rcar_gen2_scc_taps,
7067 	.taps_num	= ARRAY_SIZE(rcar_gen2_scc_taps),
71
-	.max_blk_count  = 0xffffffff,
72
-};
73
-
74
-/* Definitions for sampling clocks */
75
-static struct renesas_sdhi_scc rcar_gen3_scc_taps[] = {
76
-	{
77
-		.clk_rate = 0,
78
-		.tap = 0x00000300,
79
-	},
80
-};
81
-
82
-static const struct renesas_sdhi_of_data of_rcar_r8a7795_compatible = {
83
-	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_CLK_ACTUAL |
84
-			  TMIO_MMC_HAVE_CBSY | TMIO_MMC_MIN_RCAR2 |
85
-			  TMIO_MMC_HAVE_4TAP_HS400,
86
-	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ |
87
-			  MMC_CAP_CMD23,
88
-	.capabilities2	= MMC_CAP2_NO_WRITE_PROTECT,
89
-	.bus_shift	= 2,
90
-	.scc_offset	= 0x1000,
91
-	.taps		= rcar_gen3_scc_taps,
92
-	.taps_num	= ARRAY_SIZE(rcar_gen3_scc_taps),
93
-};
94
-
95
-static const struct renesas_sdhi_of_data of_rcar_gen3_compatible = {
96
-	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_CLK_ACTUAL |
97
-			  TMIO_MMC_HAVE_CBSY | TMIO_MMC_MIN_RCAR2,
98
-	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ |
99
-			  MMC_CAP_CMD23,
100
-	.capabilities2	= MMC_CAP2_NO_WRITE_PROTECT,
101
-	.bus_shift	= 2,
102
-	.scc_offset	= 0x1000,
103
-	.taps		= rcar_gen3_scc_taps,
104
-	.taps_num	= ARRAY_SIZE(rcar_gen3_scc_taps),
68
+	.max_blk_count	= UINT_MAX / TMIO_MAX_BLK_SIZE,
10569 };
10670 
10771 static const struct of_device_id renesas_sdhi_sys_dmac_of_match[] = {
....@@ -118,11 +82,8 @@
11882 	{ .compatible = "renesas,sdhi-r8a7792", .data = &of_rcar_gen2_compatible, },
11983 	{ .compatible = "renesas,sdhi-r8a7793", .data = &of_rcar_gen2_compatible, },
12084 	{ .compatible = "renesas,sdhi-r8a7794", .data = &of_rcar_gen2_compatible, },
121
-	{ .compatible = "renesas,sdhi-r8a7795", .data = &of_rcar_r8a7795_compatible, },
122
-	{ .compatible = "renesas,sdhi-r8a7796", .data = &of_rcar_r8a7795_compatible, },
12385 	{ .compatible = "renesas,rcar-gen1-sdhi", .data = &of_rcar_gen1_compatible, },
12486 	{ .compatible = "renesas,rcar-gen2-sdhi", .data = &of_rcar_gen2_compatible, },
125
-	{ .compatible = "renesas,rcar-gen3-sdhi", .data = &of_rcar_gen3_compatible, },
12687 	{ .compatible = "renesas,sdhi-shmobile" },
12788 	{},
12889 };
....@@ -214,10 +175,8 @@
214175 		goto pio;
215176 	}
216177 
217
-	if (sg->length < TMIO_MMC_MIN_DMA_LEN) {
218
-		host->force_pio = true;
178
+	if (sg->length < TMIO_MMC_MIN_DMA_LEN)
219179 		return;
220
-	}
221180 
222181 	/* The only sg element can be unaligned, use our bounce buffer then */
223182 	if (!aligned) {
....@@ -241,6 +200,7 @@
241200 			desc = NULL;
242201 			ret = cookie;
243202 		}
203
+		host->dma_on = true;
244204 	}
245205 pio:
246206 	if (!desc) {
....@@ -287,10 +247,8 @@
287247 		goto pio;
288248 	}
289249 
290
-	if (sg->length < TMIO_MMC_MIN_DMA_LEN) {
291
-		host->force_pio = true;
250
+	if (sg->length < TMIO_MMC_MIN_DMA_LEN)
292251 		return;
293
-	}
294252 
295253 	/* The only sg element can be unaligned, use our bounce buffer then */
296254 	if (!aligned) {
....@@ -319,6 +277,7 @@
319277 			desc = NULL;
320278 			ret = cookie;
321279 		}
280
+		host->dma_on = true;
322281 	}
323282 pio:
324283 	if (!desc) {
....@@ -488,22 +447,8 @@
488447 	.dataend = renesas_sdhi_sys_dmac_dataend_dma,
489448 };
490449 
491
-/*
492
- * Whitelist of specific R-Car Gen3 SoC ES versions to use this DMAC
493
- * implementation. Currently empty as all supported ES versions use
494
- * the internal DMAC.
495
- */
496
-static const struct soc_device_attribute gen3_soc_whitelist[] = {
497
-        { /* sentinel */ }
498
-};
499
-
500450 static int renesas_sdhi_sys_dmac_probe(struct platform_device *pdev)
501451 {
502
-	if ((of_device_get_match_data(&pdev->dev) == &of_rcar_gen3_compatible ||
503
-	    of_device_get_match_data(&pdev->dev) == &of_rcar_r8a7795_compatible) &&
504
-	    !soc_device_match(gen3_soc_whitelist))
505
-		return -ENODEV;
506
-
507452 	return renesas_sdhi_probe(pdev, &renesas_sdhi_sys_dmac_dma_ops);
508453 }
509454 
....@@ -518,6 +463,7 @@
518463 static struct platform_driver renesas_sys_dmac_sdhi_driver = {
519464 	.driver		= {
520465 		.name	= "sh_mobile_sdhi",
466
+		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
521467 		.pm	= &renesas_sdhi_sys_dmac_dev_pm_ops,
522468 		.of_match_table = renesas_sdhi_sys_dmac_of_match,
523469 	},