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Linux/drivers/mmc/host/sdhci-of-hlwd.c

  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 int sdhci_hlwd_remove(struct platform_device *pdev)
 79 {
 80         return sdhci_pltfm_unregister(pdev);
 81 }
 82 
 83 static const struct of_device_id sdhci_hlwd_of_match[] = {
 84         { .compatible = "nintendo,hollywood-sdhci" },
 85         { }
 86 };
 87 MODULE_DEVICE_TABLE(of, sdhci_hlwd_of_match);
 88 
 89 static struct platform_driver sdhci_hlwd_driver = {
 90         .driver = {
 91                 .name = "sdhci-hlwd",
 92                 .owner = THIS_MODULE,
 93                 .of_match_table = sdhci_hlwd_of_match,
 94                 .pm = SDHCI_PLTFM_PMOPS,
 95         },
 96         .probe = sdhci_hlwd_probe,
 97         .remove = sdhci_hlwd_remove,
 98 };
 99 
100 module_platform_driver(sdhci_hlwd_driver);
101 
102 MODULE_DESCRIPTION("Nintendo Wii SDHCI OF driver");
103 MODULE_AUTHOR("The GameCube Linux Team, Albert Herranz");
104 MODULE_LICENSE("GPL v2");
105 

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