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_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