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1b3f626e64
This doesn't seem to be used any longer and removing the include fixes 64-bit ARM builds. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
334 lines
9.5 KiB
C
334 lines
9.5 KiB
C
/*
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* Copyright (C) 2010 Google, Inc.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_gpio.h>
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#include <linux/gpio.h>
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#include <linux/mmc/card.h>
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#include <linux/mmc/host.h>
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#include <linux/mmc/slot-gpio.h>
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#include "sdhci-pltfm.h"
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/* Tegra SDHOST controller vendor register definitions */
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#define SDHCI_TEGRA_VENDOR_MISC_CTRL 0x120
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#define SDHCI_MISC_CTRL_ENABLE_SDR104 0x8
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#define SDHCI_MISC_CTRL_ENABLE_SDR50 0x10
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#define SDHCI_MISC_CTRL_ENABLE_SDHCI_SPEC_300 0x20
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#define SDHCI_MISC_CTRL_ENABLE_DDR50 0x200
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#define NVQUIRK_FORCE_SDHCI_SPEC_200 BIT(0)
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#define NVQUIRK_ENABLE_BLOCK_GAP_DET BIT(1)
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#define NVQUIRK_ENABLE_SDHCI_SPEC_300 BIT(2)
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#define NVQUIRK_DISABLE_SDR50 BIT(3)
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#define NVQUIRK_DISABLE_SDR104 BIT(4)
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#define NVQUIRK_DISABLE_DDR50 BIT(5)
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struct sdhci_tegra_soc_data {
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const struct sdhci_pltfm_data *pdata;
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u32 nvquirks;
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};
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struct sdhci_tegra {
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const struct sdhci_tegra_soc_data *soc_data;
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int power_gpio;
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};
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static u16 tegra_sdhci_readw(struct sdhci_host *host, int reg)
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{
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struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
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struct sdhci_tegra *tegra_host = pltfm_host->priv;
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const struct sdhci_tegra_soc_data *soc_data = tegra_host->soc_data;
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if (unlikely((soc_data->nvquirks & NVQUIRK_FORCE_SDHCI_SPEC_200) &&
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(reg == SDHCI_HOST_VERSION))) {
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/* Erratum: Version register is invalid in HW. */
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return SDHCI_SPEC_200;
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}
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return readw(host->ioaddr + reg);
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}
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static void tegra_sdhci_writel(struct sdhci_host *host, u32 val, int reg)
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{
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struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
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struct sdhci_tegra *tegra_host = pltfm_host->priv;
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const struct sdhci_tegra_soc_data *soc_data = tegra_host->soc_data;
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/* Seems like we're getting spurious timeout and crc errors, so
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* disable signalling of them. In case of real errors software
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* timers should take care of eventually detecting them.
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*/
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if (unlikely(reg == SDHCI_SIGNAL_ENABLE))
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val &= ~(SDHCI_INT_TIMEOUT|SDHCI_INT_CRC);
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writel(val, host->ioaddr + reg);
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if (unlikely((soc_data->nvquirks & NVQUIRK_ENABLE_BLOCK_GAP_DET) &&
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(reg == SDHCI_INT_ENABLE))) {
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/* Erratum: Must enable block gap interrupt detection */
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u8 gap_ctrl = readb(host->ioaddr + SDHCI_BLOCK_GAP_CONTROL);
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if (val & SDHCI_INT_CARD_INT)
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gap_ctrl |= 0x8;
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else
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gap_ctrl &= ~0x8;
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writeb(gap_ctrl, host->ioaddr + SDHCI_BLOCK_GAP_CONTROL);
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}
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}
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static unsigned int tegra_sdhci_get_ro(struct sdhci_host *host)
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{
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return mmc_gpio_get_ro(host->mmc);
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}
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static void tegra_sdhci_reset(struct sdhci_host *host, u8 mask)
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{
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struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
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struct sdhci_tegra *tegra_host = pltfm_host->priv;
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const struct sdhci_tegra_soc_data *soc_data = tegra_host->soc_data;
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u32 misc_ctrl;
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sdhci_reset(host, mask);
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if (!(mask & SDHCI_RESET_ALL))
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return;
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misc_ctrl = sdhci_readw(host, SDHCI_TEGRA_VENDOR_MISC_CTRL);
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/* Erratum: Enable SDHCI spec v3.00 support */
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if (soc_data->nvquirks & NVQUIRK_ENABLE_SDHCI_SPEC_300)
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misc_ctrl |= SDHCI_MISC_CTRL_ENABLE_SDHCI_SPEC_300;
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/* Don't advertise UHS modes which aren't supported yet */
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if (soc_data->nvquirks & NVQUIRK_DISABLE_SDR50)
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misc_ctrl &= ~SDHCI_MISC_CTRL_ENABLE_SDR50;
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if (soc_data->nvquirks & NVQUIRK_DISABLE_DDR50)
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misc_ctrl &= ~SDHCI_MISC_CTRL_ENABLE_DDR50;
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if (soc_data->nvquirks & NVQUIRK_DISABLE_SDR104)
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misc_ctrl &= ~SDHCI_MISC_CTRL_ENABLE_SDR104;
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sdhci_writew(host, misc_ctrl, SDHCI_TEGRA_VENDOR_MISC_CTRL);
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}
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static void tegra_sdhci_set_bus_width(struct sdhci_host *host, int bus_width)
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{
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u32 ctrl;
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ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
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if ((host->mmc->caps & MMC_CAP_8_BIT_DATA) &&
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(bus_width == MMC_BUS_WIDTH_8)) {
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ctrl &= ~SDHCI_CTRL_4BITBUS;
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ctrl |= SDHCI_CTRL_8BITBUS;
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} else {
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ctrl &= ~SDHCI_CTRL_8BITBUS;
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if (bus_width == MMC_BUS_WIDTH_4)
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ctrl |= SDHCI_CTRL_4BITBUS;
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else
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ctrl &= ~SDHCI_CTRL_4BITBUS;
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}
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sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
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}
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static const struct sdhci_ops tegra_sdhci_ops = {
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.get_ro = tegra_sdhci_get_ro,
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.read_w = tegra_sdhci_readw,
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.write_l = tegra_sdhci_writel,
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.set_clock = sdhci_set_clock,
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.set_bus_width = tegra_sdhci_set_bus_width,
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.reset = tegra_sdhci_reset,
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.set_uhs_signaling = sdhci_set_uhs_signaling,
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.get_max_clock = sdhci_pltfm_clk_get_max_clock,
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};
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static const struct sdhci_pltfm_data sdhci_tegra20_pdata = {
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.quirks = SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
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SDHCI_QUIRK_SINGLE_POWER_WRITE |
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SDHCI_QUIRK_NO_HISPD_BIT |
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SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC |
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SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
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.ops = &tegra_sdhci_ops,
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};
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static struct sdhci_tegra_soc_data soc_data_tegra20 = {
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.pdata = &sdhci_tegra20_pdata,
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.nvquirks = NVQUIRK_FORCE_SDHCI_SPEC_200 |
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NVQUIRK_ENABLE_BLOCK_GAP_DET,
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};
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static const struct sdhci_pltfm_data sdhci_tegra30_pdata = {
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.quirks = SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
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SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK |
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SDHCI_QUIRK_SINGLE_POWER_WRITE |
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SDHCI_QUIRK_NO_HISPD_BIT |
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SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC |
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SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
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.ops = &tegra_sdhci_ops,
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};
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static struct sdhci_tegra_soc_data soc_data_tegra30 = {
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.pdata = &sdhci_tegra30_pdata,
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.nvquirks = NVQUIRK_ENABLE_SDHCI_SPEC_300 |
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NVQUIRK_DISABLE_SDR50 |
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NVQUIRK_DISABLE_SDR104,
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};
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static const struct sdhci_pltfm_data sdhci_tegra114_pdata = {
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.quirks = SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
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SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK |
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SDHCI_QUIRK_SINGLE_POWER_WRITE |
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SDHCI_QUIRK_NO_HISPD_BIT |
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SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC |
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SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
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.ops = &tegra_sdhci_ops,
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};
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static struct sdhci_tegra_soc_data soc_data_tegra114 = {
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.pdata = &sdhci_tegra114_pdata,
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.nvquirks = NVQUIRK_DISABLE_SDR50 |
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NVQUIRK_DISABLE_DDR50 |
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NVQUIRK_DISABLE_SDR104,
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};
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static const struct of_device_id sdhci_tegra_dt_match[] = {
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{ .compatible = "nvidia,tegra124-sdhci", .data = &soc_data_tegra114 },
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{ .compatible = "nvidia,tegra114-sdhci", .data = &soc_data_tegra114 },
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{ .compatible = "nvidia,tegra30-sdhci", .data = &soc_data_tegra30 },
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{ .compatible = "nvidia,tegra20-sdhci", .data = &soc_data_tegra20 },
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{}
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};
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MODULE_DEVICE_TABLE(of, sdhci_tegra_dt_match);
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static int sdhci_tegra_parse_dt(struct device *dev)
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{
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struct device_node *np = dev->of_node;
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struct sdhci_host *host = dev_get_drvdata(dev);
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struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
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struct sdhci_tegra *tegra_host = pltfm_host->priv;
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tegra_host->power_gpio = of_get_named_gpio(np, "power-gpios", 0);
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return mmc_of_parse(host->mmc);
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}
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static int sdhci_tegra_probe(struct platform_device *pdev)
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{
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const struct of_device_id *match;
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const struct sdhci_tegra_soc_data *soc_data;
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struct sdhci_host *host;
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struct sdhci_pltfm_host *pltfm_host;
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struct sdhci_tegra *tegra_host;
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struct clk *clk;
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int rc;
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match = of_match_device(sdhci_tegra_dt_match, &pdev->dev);
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if (!match)
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return -EINVAL;
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soc_data = match->data;
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host = sdhci_pltfm_init(pdev, soc_data->pdata, 0);
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if (IS_ERR(host))
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return PTR_ERR(host);
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pltfm_host = sdhci_priv(host);
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tegra_host = devm_kzalloc(&pdev->dev, sizeof(*tegra_host), GFP_KERNEL);
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if (!tegra_host) {
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dev_err(mmc_dev(host->mmc), "failed to allocate tegra_host\n");
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rc = -ENOMEM;
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goto err_alloc_tegra_host;
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}
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tegra_host->soc_data = soc_data;
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pltfm_host->priv = tegra_host;
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rc = sdhci_tegra_parse_dt(&pdev->dev);
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if (rc)
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goto err_parse_dt;
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if (gpio_is_valid(tegra_host->power_gpio)) {
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rc = gpio_request(tegra_host->power_gpio, "sdhci_power");
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if (rc) {
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dev_err(mmc_dev(host->mmc),
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"failed to allocate power gpio\n");
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goto err_power_req;
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}
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gpio_direction_output(tegra_host->power_gpio, 1);
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}
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clk = clk_get(mmc_dev(host->mmc), NULL);
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if (IS_ERR(clk)) {
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dev_err(mmc_dev(host->mmc), "clk err\n");
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rc = PTR_ERR(clk);
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goto err_clk_get;
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}
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clk_prepare_enable(clk);
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pltfm_host->clk = clk;
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rc = sdhci_add_host(host);
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if (rc)
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goto err_add_host;
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return 0;
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err_add_host:
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clk_disable_unprepare(pltfm_host->clk);
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clk_put(pltfm_host->clk);
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err_clk_get:
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if (gpio_is_valid(tegra_host->power_gpio))
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gpio_free(tegra_host->power_gpio);
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err_power_req:
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err_parse_dt:
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err_alloc_tegra_host:
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sdhci_pltfm_free(pdev);
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return rc;
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}
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static int sdhci_tegra_remove(struct platform_device *pdev)
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{
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struct sdhci_host *host = platform_get_drvdata(pdev);
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struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
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struct sdhci_tegra *tegra_host = pltfm_host->priv;
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int dead = (readl(host->ioaddr + SDHCI_INT_STATUS) == 0xffffffff);
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sdhci_remove_host(host, dead);
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if (gpio_is_valid(tegra_host->power_gpio))
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gpio_free(tegra_host->power_gpio);
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clk_disable_unprepare(pltfm_host->clk);
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clk_put(pltfm_host->clk);
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sdhci_pltfm_free(pdev);
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return 0;
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}
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static struct platform_driver sdhci_tegra_driver = {
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.driver = {
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.name = "sdhci-tegra",
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.owner = THIS_MODULE,
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.of_match_table = sdhci_tegra_dt_match,
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.pm = SDHCI_PLTFM_PMOPS,
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},
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.probe = sdhci_tegra_probe,
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.remove = sdhci_tegra_remove,
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};
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module_platform_driver(sdhci_tegra_driver);
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MODULE_DESCRIPTION("SDHCI driver for Tegra");
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MODULE_AUTHOR("Google, Inc.");
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MODULE_LICENSE("GPL v2");
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