1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * drivers/mmc/host/sdhci-of-hlwd.c
4 *
5 * Nintendo Wii Secure Digital Host Controller Interface.
6 * Copyright (C) 2009 The GameCube Linux Team
7 * Copyright (C) 2009 Albert Herranz
8 *
9 * Based on sdhci-of-esdhc.c
10 *
11 * Copyright (c) 2007 Freescale Semiconductor, Inc.
12 * Copyright (c) 2009 MontaVista Software, Inc.
13 *
14 * Authors: Xiaobo Xie <X.Xie@freescale.com>
15 * Anton Vorontsov <avorontsov@ru.mvista.com>
16 */
17
18 #include <linux/delay.h>
19 #include <linux/module.h>
20 #include <linux/mmc/host.h>
21 #include "sdhci-pltfm.h"
22
23 /*
24 * Ops and quirks for the Nintendo Wii SDHCI controllers.
25 */
26
27 /*
28 * We need a small delay after each write, or things go horribly wrong.
29 */
30 #define SDHCI_HLWD_WRITE_DELAY 5 /* usecs */
31
sdhci_hlwd_writel(struct sdhci_host * host,u32 val,int reg)32 static void sdhci_hlwd_writel(struct sdhci_host *host, u32 val, int reg)
33 {
34 sdhci_be32bs_writel(host, val, reg);
35 udelay(SDHCI_HLWD_WRITE_DELAY);
36 }
37
sdhci_hlwd_writew(struct sdhci_host * host,u16 val,int reg)38 static void sdhci_hlwd_writew(struct sdhci_host *host, u16 val, int reg)
39 {
40 sdhci_be32bs_writew(host, val, reg);
41 udelay(SDHCI_HLWD_WRITE_DELAY);
42 }
43
sdhci_hlwd_writeb(struct sdhci_host * host,u8 val,int reg)44 static void sdhci_hlwd_writeb(struct sdhci_host *host, u8 val, int reg)
45 {
46 sdhci_be32bs_writeb(host, val, reg);
47 udelay(SDHCI_HLWD_WRITE_DELAY);
48 }
49
50 static const struct sdhci_ops sdhci_hlwd_ops = {
51 .read_l = sdhci_be32bs_readl,
52 .read_w = sdhci_be32bs_readw,
53 .read_b = sdhci_be32bs_readb,
54 .write_l = sdhci_hlwd_writel,
55 .write_w = sdhci_hlwd_writew,
56 .write_b = sdhci_hlwd_writeb,
57 .set_clock = sdhci_set_clock,
58 .set_bus_width = sdhci_set_bus_width,
59 .reset = sdhci_reset,
60 .set_uhs_signaling = sdhci_set_uhs_signaling,
61 };
62
63 static const struct sdhci_pltfm_data sdhci_hlwd_pdata = {
64 .quirks = SDHCI_QUIRK_32BIT_DMA_ADDR |
65 SDHCI_QUIRK_32BIT_DMA_SIZE,
66 .ops = &sdhci_hlwd_ops,
67 };
68
sdhci_hlwd_probe(struct platform_device * pdev)69 static int sdhci_hlwd_probe(struct platform_device *pdev)
70 {
71 return sdhci_pltfm_register(pdev, &sdhci_hlwd_pdata, 0);
72 }
73
74 static const struct of_device_id sdhci_hlwd_of_match[] = {
75 { .compatible = "nintendo,hollywood-sdhci" },
76 { }
77 };
78 MODULE_DEVICE_TABLE(of, sdhci_hlwd_of_match);
79
80 static struct platform_driver sdhci_hlwd_driver = {
81 .driver = {
82 .name = "sdhci-hlwd",
83 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
84 .of_match_table = sdhci_hlwd_of_match,
85 .pm = &sdhci_pltfm_pmops,
86 },
87 .probe = sdhci_hlwd_probe,
88 .remove = sdhci_pltfm_unregister,
89 };
90
91 module_platform_driver(sdhci_hlwd_driver);
92
93 MODULE_DESCRIPTION("Nintendo Wii SDHCI OF driver");
94 MODULE_AUTHOR("The GameCube Linux Team, Albert Herranz");
95 MODULE_LICENSE("GPL v2");
96