1 /* 2 * drivers/mmc/host/sdhci-of-hlwd.c 3 * 4 * Nintendo Wii Secure Digital Host Controller Interface. 5 * Copyright (C) 2009 The GameCube Linux Team 6 * Copyright (C) 2009 Albert Herranz 7 * 8 * Based on sdhci-of-esdhc.c 9 * 10 * Copyright (c) 2007 Freescale Semiconductor, Inc. 11 * Copyright (c) 2009 MontaVista Software, Inc. 12 * 13 * Authors: Xiaobo Xie <X.Xie@freescale.com> 14 * Anton Vorontsov <avorontsov@ru.mvista.com> 15 * 16 * This program is free software; you can redistribute it and/or modify 17 * it under the terms of the GNU General Public License as published by 18 * the Free Software Foundation; either version 2 of the License, or (at 19 * your option) any later version. 20 */ 21 22 #include <linux/delay.h> 23 #include <linux/module.h> 24 #include <linux/mmc/host.h> 25 #include "sdhci-pltfm.h" 26 27 /* 28 * Ops and quirks for the Nintendo Wii SDHCI controllers. 29 */ 30 31 /* 32 * We need a small delay after each write, or things go horribly wrong. 33 */ 34 #define SDHCI_HLWD_WRITE_DELAY 5 /* usecs */ 35 36 static void sdhci_hlwd_writel(struct sdhci_host *host, u32 val, int reg) 37 { 38 sdhci_be32bs_writel(host, val, reg); 39 udelay(SDHCI_HLWD_WRITE_DELAY); 40 } 41 42 static void sdhci_hlwd_writew(struct sdhci_host *host, u16 val, int reg) 43 { 44 sdhci_be32bs_writew(host, val, reg); 45 udelay(SDHCI_HLWD_WRITE_DELAY); 46 } 47 48 static void sdhci_hlwd_writeb(struct sdhci_host *host, u8 val, int reg) 49 { 50 sdhci_be32bs_writeb(host, val, reg); 51 udelay(SDHCI_HLWD_WRITE_DELAY); 52 } 53 54 static const struct sdhci_ops sdhci_hlwd_ops = { 55 .read_l = sdhci_be32bs_readl, 56 .read_w = sdhci_be32bs_readw, 57 .read_b = sdhci_be32bs_readb, 58 .write_l = sdhci_hlwd_writel, 59 .write_w = sdhci_hlwd_writew, 60 .write_b = sdhci_hlwd_writeb, 61 .set_clock = sdhci_set_clock, 62 .set_bus_width = sdhci_set_bus_width, 63 .reset = sdhci_reset, 64 .set_uhs_signaling = sdhci_set_uhs_signaling, 65 }; 66 67 static const struct sdhci_pltfm_data sdhci_hlwd_pdata = { 68 .quirks = SDHCI_QUIRK_32BIT_DMA_ADDR | 69 SDHCI_QUIRK_32BIT_DMA_SIZE, 70 .ops = &sdhci_hlwd_ops, 71 }; 72 73 static int sdhci_hlwd_probe(struct platform_device *pdev) 74 { 75 return sdhci_pltfm_register(pdev, &sdhci_hlwd_pdata, 0); 76 } 77 78 static const struct of_device_id sdhci_hlwd_of_match[] = { 79 { .compatible = "nintendo,hollywood-sdhci" }, 80 { } 81 }; 82 MODULE_DEVICE_TABLE(of, sdhci_hlwd_of_match); 83 84 static struct platform_driver sdhci_hlwd_driver = { 85 .driver = { 86 .name = "sdhci-hlwd", 87 .of_match_table = sdhci_hlwd_of_match, 88 .pm = SDHCI_PLTFM_PMOPS, 89 }, 90 .probe = sdhci_hlwd_probe, 91 .remove = sdhci_pltfm_unregister, 92 }; 93 94 module_platform_driver(sdhci_hlwd_driver); 95 96 MODULE_DESCRIPTION("Nintendo Wii SDHCI OF driver"); 97 MODULE_AUTHOR("The GameCube Linux Team, Albert Herranz"); 98 MODULE_LICENSE("GPL v2"); 99