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 | |
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 | |
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 | |
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 | |
69 | static int sdhci_hlwd_probe(struct platform_device *pdev) |
70 | { |
71 | return sdhci_pltfm_init_and_add_host(pdev, pdata: &sdhci_hlwd_pdata, priv_size: 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_new = sdhci_pltfm_remove, |
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 | |