| /* |
| * OpenFirmware bindings for Secure Digital Host Controller Interface. |
| * |
| * 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/err.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/io.h> |
| #include <linux/interrupt.h> |
| #include <linux/delay.h> |
| #include <linux/of.h> |
| #include <linux/of_platform.h> |
| #include <linux/of_address.h> |
| #include <linux/of_irq.h> |
| #include <linux/mmc/host.h> |
| #ifdef CONFIG_PPC |
| #include <asm/machdep.h> |
| #endif |
| #include "sdhci-of.h" |
| #include "sdhci.h" |
| |
| #ifdef CONFIG_MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER |
| |
| /* |
| * These accessors are designed for big endian hosts doing I/O to |
| * little endian controllers incorporating a 32-bit hardware byte swapper. |
| */ |
| |
| u32 sdhci_be32bs_readl(struct sdhci_host *host, int reg) |
| { |
| return in_be32(host->ioaddr + reg); |
| } |
| |
| u16 sdhci_be32bs_readw(struct sdhci_host *host, int reg) |
| { |
| return in_be16(host->ioaddr + (reg ^ 0x2)); |
| } |
| |
| u8 sdhci_be32bs_readb(struct sdhci_host *host, int reg) |
| { |
| return in_8(host->ioaddr + (reg ^ 0x3)); |
| } |
| |
| void sdhci_be32bs_writel(struct sdhci_host *host, u32 val, int reg) |
| { |
| out_be32(host->ioaddr + reg, val); |
| } |
| |
| void sdhci_be32bs_writew(struct sdhci_host *host, u16 val, int reg) |
| { |
| struct sdhci_of_host *of_host = sdhci_priv(host); |
| int base = reg & ~0x3; |
| int shift = (reg & 0x2) * 8; |
| |
| switch (reg) { |
| case SDHCI_TRANSFER_MODE: |
| /* |
| * Postpone this write, we must do it together with a |
| * command write that is down below. |
| */ |
| of_host->xfer_mode_shadow = val; |
| return; |
| case SDHCI_COMMAND: |
| sdhci_be32bs_writel(host, val << 16 | of_host->xfer_mode_shadow, |
| SDHCI_TRANSFER_MODE); |
| return; |
| } |
| clrsetbits_be32(host->ioaddr + base, 0xffff << shift, val << shift); |
| } |
| |
| void sdhci_be32bs_writeb(struct sdhci_host *host, u8 val, int reg) |
| { |
| int base = reg & ~0x3; |
| int shift = (reg & 0x3) * 8; |
| |
| clrsetbits_be32(host->ioaddr + base , 0xff << shift, val << shift); |
| } |
| #endif /* CONFIG_MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER */ |
| |
| #ifdef CONFIG_PM |
| |
| static int sdhci_of_suspend(struct platform_device *ofdev, pm_message_t state) |
| { |
| struct sdhci_host *host = dev_get_drvdata(&ofdev->dev); |
| |
| return mmc_suspend_host(host->mmc); |
| } |
| |
| static int sdhci_of_resume(struct platform_device *ofdev) |
| { |
| struct sdhci_host *host = dev_get_drvdata(&ofdev->dev); |
| |
| return mmc_resume_host(host->mmc); |
| } |
| |
| #else |
| |
| #define sdhci_of_suspend NULL |
| #define sdhci_of_resume NULL |
| |
| #endif |
| |
| static bool __devinit sdhci_of_wp_inverted(struct device_node *np) |
| { |
| if (of_get_property(np, "sdhci,wp-inverted", NULL)) |
| return true; |
| |
| /* Old device trees don't have the wp-inverted property. */ |
| #ifdef CONFIG_PPC |
| return machine_is(mpc837x_rdb) || machine_is(mpc837x_mds); |
| #else |
| return false; |
| #endif |
| } |
| |
| static int __devinit sdhci_of_probe(struct platform_device *ofdev, |
| const struct of_device_id *match) |
| { |
| struct device_node *np = ofdev->dev.of_node; |
| struct sdhci_of_data *sdhci_of_data = match->data; |
| struct sdhci_host *host; |
| struct sdhci_of_host *of_host; |
| const __be32 *clk; |
| int size; |
| int ret; |
| |
| if (!of_device_is_available(np)) |
| return -ENODEV; |
| |
| host = sdhci_alloc_host(&ofdev->dev, sizeof(*of_host)); |
| if (IS_ERR(host)) |
| return -ENOMEM; |
| |
| of_host = sdhci_priv(host); |
| dev_set_drvdata(&ofdev->dev, host); |
| |
| host->ioaddr = of_iomap(np, 0); |
| if (!host->ioaddr) { |
| ret = -ENOMEM; |
| goto err_addr_map; |
| } |
| |
| host->irq = irq_of_parse_and_map(np, 0); |
| if (!host->irq) { |
| ret = -EINVAL; |
| goto err_no_irq; |
| } |
| |
| host->hw_name = dev_name(&ofdev->dev); |
| if (sdhci_of_data) { |
| host->quirks = sdhci_of_data->quirks; |
| host->ops = &sdhci_of_data->ops; |
| } |
| |
| if (of_get_property(np, "sdhci,auto-cmd12", NULL)) |
| host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12; |
| |
| |
| if (of_get_property(np, "sdhci,1-bit-only", NULL)) |
| host->quirks |= SDHCI_QUIRK_FORCE_1_BIT_DATA; |
| |
| if (sdhci_of_wp_inverted(np)) |
| host->quirks |= SDHCI_QUIRK_INVERTED_WRITE_PROTECT; |
| |
| clk = of_get_property(np, "clock-frequency", &size); |
| if (clk && size == sizeof(*clk) && *clk) |
| of_host->clock = be32_to_cpup(clk); |
| |
| ret = sdhci_add_host(host); |
| if (ret) |
| goto err_add_host; |
| |
| return 0; |
| |
| err_add_host: |
| irq_dispose_mapping(host->irq); |
| err_no_irq: |
| iounmap(host->ioaddr); |
| err_addr_map: |
| sdhci_free_host(host); |
| return ret; |
| } |
| |
| static int __devexit sdhci_of_remove(struct platform_device *ofdev) |
| { |
| struct sdhci_host *host = dev_get_drvdata(&ofdev->dev); |
| |
| sdhci_remove_host(host, 0); |
| sdhci_free_host(host); |
| irq_dispose_mapping(host->irq); |
| iounmap(host->ioaddr); |
| return 0; |
| } |
| |
| static const struct of_device_id sdhci_of_match[] = { |
| #ifdef CONFIG_MMC_SDHCI_OF_ESDHC |
| { .compatible = "fsl,mpc8379-esdhc", .data = &sdhci_esdhc, }, |
| { .compatible = "fsl,mpc8536-esdhc", .data = &sdhci_esdhc, }, |
| { .compatible = "fsl,esdhc", .data = &sdhci_esdhc, }, |
| #endif |
| #ifdef CONFIG_MMC_SDHCI_OF_HLWD |
| { .compatible = "nintendo,hollywood-sdhci", .data = &sdhci_hlwd, }, |
| #endif |
| { .compatible = "generic-sdhci", }, |
| {}, |
| }; |
| MODULE_DEVICE_TABLE(of, sdhci_of_match); |
| |
| static struct of_platform_driver sdhci_of_driver = { |
| .driver = { |
| .name = "sdhci-of", |
| .owner = THIS_MODULE, |
| .of_match_table = sdhci_of_match, |
| }, |
| .probe = sdhci_of_probe, |
| .remove = __devexit_p(sdhci_of_remove), |
| .suspend = sdhci_of_suspend, |
| .resume = sdhci_of_resume, |
| }; |
| |
| static int __init sdhci_of_init(void) |
| { |
| return of_register_platform_driver(&sdhci_of_driver); |
| } |
| module_init(sdhci_of_init); |
| |
| static void __exit sdhci_of_exit(void) |
| { |
| of_unregister_platform_driver(&sdhci_of_driver); |
| } |
| module_exit(sdhci_of_exit); |
| |
| MODULE_DESCRIPTION("Secure Digital Host Controller Interface OF driver"); |
| MODULE_AUTHOR("Xiaobo Xie <X.Xie@freescale.com>, " |
| "Anton Vorontsov <avorontsov@ru.mvista.com>"); |
| MODULE_LICENSE("GPL"); |