| /* |
| * Freescale eSDHC controller driver. |
| * |
| * Copyright (c) 2007 Freescale Semiconductor, Inc. |
| * Copyright (c) 2009 MontaVista Software, Inc. |
| * |
| * Authors: Xiaobo Xie <X.Xie@freescale.com> |
| * Anton Vorontsov <avorontsov@ru.mvista.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or (at |
| * your option) any later version. |
| */ |
| |
| #include <linux/io.h> |
| #include <linux/delay.h> |
| #include <linux/mmc/host.h> |
| #include "sdhci-pltfm.h" |
| #include "sdhci.h" |
| #include "sdhci-esdhc.h" |
| |
| static u16 esdhc_readw(struct sdhci_host *host, int reg) |
| { |
| u16 ret; |
| |
| if (unlikely(reg == SDHCI_HOST_VERSION)) |
| ret = in_be16(host->ioaddr + reg); |
| else |
| ret = sdhci_be32bs_readw(host, reg); |
| return ret; |
| } |
| |
| static void esdhc_writew(struct sdhci_host *host, u16 val, int reg) |
| { |
| if (reg == SDHCI_BLOCK_SIZE) { |
| /* |
| * Two last DMA bits are reserved, and first one is used for |
| * non-standard blksz of 4096 bytes that we don't support |
| * yet. So clear the DMA boundary bits. |
| */ |
| val &= ~SDHCI_MAKE_BLKSZ(0x7, 0); |
| } |
| sdhci_be32bs_writew(host, val, reg); |
| } |
| |
| static void esdhc_writeb(struct sdhci_host *host, u8 val, int reg) |
| { |
| /* Prevent SDHCI core from writing reserved bits (e.g. HISPD). */ |
| if (reg == SDHCI_HOST_CONTROL) |
| val &= ~ESDHC_HOST_CONTROL_RES; |
| sdhci_be32bs_writeb(host, val, reg); |
| } |
| |
| static int esdhc_of_enable_dma(struct sdhci_host *host) |
| { |
| setbits32(host->ioaddr + ESDHC_DMA_SYSCTL, ESDHC_DMA_SNOOP); |
| return 0; |
| } |
| |
| static unsigned int esdhc_of_get_max_clock(struct sdhci_host *host) |
| { |
| struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); |
| |
| return pltfm_host->clock; |
| } |
| |
| static unsigned int esdhc_of_get_min_clock(struct sdhci_host *host) |
| { |
| struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); |
| |
| return pltfm_host->clock / 256 / 16; |
| } |
| |
| static struct sdhci_ops sdhci_esdhc_ops = { |
| .read_l = sdhci_be32bs_readl, |
| .read_w = esdhc_readw, |
| .read_b = sdhci_be32bs_readb, |
| .write_l = sdhci_be32bs_writel, |
| .write_w = esdhc_writew, |
| .write_b = esdhc_writeb, |
| .set_clock = esdhc_set_clock, |
| .enable_dma = esdhc_of_enable_dma, |
| .get_max_clock = esdhc_of_get_max_clock, |
| .get_min_clock = esdhc_of_get_min_clock, |
| }; |
| |
| static struct sdhci_pltfm_data sdhci_esdhc_pdata = { |
| /* card detection could be handled via GPIO */ |
| .quirks = ESDHC_DEFAULT_QUIRKS | SDHCI_QUIRK_BROKEN_CARD_DETECTION |
| | SDHCI_QUIRK_NO_CARD_NO_RESET, |
| .ops = &sdhci_esdhc_ops, |
| }; |
| |
| static int __devinit sdhci_esdhc_probe(struct platform_device *pdev) |
| { |
| return sdhci_pltfm_register(pdev, &sdhci_esdhc_pdata); |
| } |
| |
| static int __devexit sdhci_esdhc_remove(struct platform_device *pdev) |
| { |
| return sdhci_pltfm_unregister(pdev); |
| } |
| |
| static const struct of_device_id sdhci_esdhc_of_match[] = { |
| { .compatible = "fsl,mpc8379-esdhc" }, |
| { .compatible = "fsl,mpc8536-esdhc" }, |
| { .compatible = "fsl,esdhc" }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(of, sdhci_esdhc_of_match); |
| |
| static struct platform_driver sdhci_esdhc_driver = { |
| .driver = { |
| .name = "sdhci-esdhc", |
| .owner = THIS_MODULE, |
| .of_match_table = sdhci_esdhc_of_match, |
| }, |
| .probe = sdhci_esdhc_probe, |
| .remove = __devexit_p(sdhci_esdhc_remove), |
| #ifdef CONFIG_PM |
| .suspend = sdhci_pltfm_suspend, |
| .resume = sdhci_pltfm_resume, |
| #endif |
| }; |
| |
| static int __init sdhci_esdhc_init(void) |
| { |
| return platform_driver_register(&sdhci_esdhc_driver); |
| } |
| module_init(sdhci_esdhc_init); |
| |
| static void __exit sdhci_esdhc_exit(void) |
| { |
| platform_driver_unregister(&sdhci_esdhc_driver); |
| } |
| module_exit(sdhci_esdhc_exit); |
| |
| MODULE_DESCRIPTION("SDHCI OF driver for Freescale MPC eSDHC"); |
| MODULE_AUTHOR("Xiaobo Xie <X.Xie@freescale.com>, " |
| "Anton Vorontsov <avorontsov@ru.mvista.com>"); |
| MODULE_LICENSE("GPL v2"); |