* (C) Copyright 2009 SAMSUNG Electronics
* Minkyu Kang <mk7.kang@samsung.com>
* Jaehoon Chung <jh80.chung@samsung.com>
- * Portions Copyright 2011-2015 NVIDIA Corporation
+ * Portions Copyright 2011-2016 NVIDIA Corporation
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <asm/arch/clock.h>
#include <asm/arch-tegra/clk_rst.h>
#endif
-#include <asm/arch-tegra/mmc.h>
#include <asm/arch-tegra/tegra_mmc.h>
#include <mmc.h>
struct tegra_mmc_priv {
struct tegra_mmc *reg;
- int id; /* device id/number, 0-3 */
- int enabled; /* 1 to enable, 0 to disable */
- int width; /* Bus Width, 1, 4 or 8 */
#ifdef CONFIG_TEGRA186
struct reset_ctl reset_ctl;
struct clk clk;
unsigned int version; /* SDHCI spec. version */
unsigned int clock; /* Current clock (MHz) */
struct mmc_config cfg; /* mmc configuration */
+ struct mmc *mmc;
};
-struct tegra_mmc_priv mmc_host[CONFIG_SYS_MMC_MAX_DEVICE];
-
-#if !CONFIG_IS_ENABLED(OF_CONTROL)
-#error "Please enable device tree support to use this driver"
-#endif
-
static void tegra_mmc_set_power(struct tegra_mmc_priv *priv,
unsigned short power)
{
tegra_mmc_pad_init(priv);
}
-static int tegra_mmc_core_init(struct mmc *mmc)
+static int tegra_mmc_init(struct mmc *mmc)
{
struct tegra_mmc_priv *priv = mmc->priv;
unsigned int mask;
- debug(" mmc_core_init called\n");
+ debug(" tegra_mmc_init called\n");
tegra_mmc_reset(priv, mmc);
static const struct mmc_ops tegra_mmc_ops = {
.send_cmd = tegra_mmc_send_cmd,
.set_ios = tegra_mmc_set_ios,
- .init = tegra_mmc_core_init,
+ .init = tegra_mmc_init,
.getcd = tegra_mmc_getcd,
};
-static int do_mmc_init(int dev_index, bool removable)
+static int tegra_mmc_probe(struct udevice *dev)
{
- struct tegra_mmc_priv *priv;
- struct mmc *mmc;
+ struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
+ struct tegra_mmc_priv *priv = dev_get_priv(dev);
+ int bus_width;
#ifdef CONFIG_TEGRA186
int ret;
#endif
- /* DT should have been read & host config filled in */
- priv = &mmc_host[dev_index];
- if (!priv->enabled)
- return -1;
-
- debug(" do_mmc_init: index %d, bus width %d pwr_gpio %d cd_gpio %d\n",
- dev_index, priv->width, gpio_get_number(&priv->pwr_gpio),
- gpio_get_number(&priv->cd_gpio));
-
- priv->clock = 0;
-
-#ifdef CONFIG_TEGRA186
- ret = reset_assert(&priv->reset_ctl);
- if (ret)
- return ret;
- ret = clk_enable(&priv->clk);
- if (ret)
- return ret;
- ret = clk_set_rate(&priv->clk, 20000000);
- if (IS_ERR_VALUE(ret))
- return ret;
- ret = reset_deassert(&priv->reset_ctl);
- if (ret)
- return ret;
-#else
- clock_start_periph_pll(priv->mmc_id, CLOCK_ID_PERIPH, 20000000);
-#endif
-
- if (dm_gpio_is_valid(&priv->pwr_gpio))
- dm_gpio_set_value(&priv->pwr_gpio, 1);
-
- memset(&priv->cfg, 0, sizeof(priv->cfg));
-
priv->cfg.name = "Tegra SD/MMC";
priv->cfg.ops = &tegra_mmc_ops;
+ bus_width = fdtdec_get_int(gd->fdt_blob, dev->of_offset, "bus-width",
+ 1);
+
priv->cfg.voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
priv->cfg.host_caps = 0;
- if (priv->width == 8)
+ if (bus_width == 8)
priv->cfg.host_caps |= MMC_MODE_8BIT;
- if (priv->width >= 4)
+ if (bus_width >= 4)
priv->cfg.host_caps |= MMC_MODE_4BIT;
priv->cfg.host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
priv->cfg.b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
- mmc = mmc_create(&priv->cfg, priv);
- mmc->block_dev.removable = removable;
- if (mmc == NULL)
- return -1;
-
- return 0;
-}
-
-/**
- * Get the host address and peripheral ID for a node.
- *
- * @param blob fdt blob
- * @param node Device index (0-3)
- * @param priv Structure to fill in (reg, width, mmc_id)
- */
-static int mmc_get_config(const void *blob, int node,
- struct tegra_mmc_priv *priv, bool *removablep)
-{
- debug("%s: node = %d\n", __func__, node);
-
- priv->enabled = fdtdec_get_is_enabled(blob, node);
-
- priv->reg = (struct tegra_mmc *)fdtdec_get_addr(blob, node, "reg");
- if ((fdt_addr_t)priv->reg == FDT_ADDR_T_NONE) {
- debug("%s: no sdmmc base reg info found\n", __func__);
- return -FDT_ERR_NOTFOUND;
- }
+ priv->reg = (void *)dev_get_addr(dev);
#ifdef CONFIG_TEGRA186
- {
- /*
- * FIXME: This variable should go away when the MMC device
- * actually is a udevice.
- */
- struct udevice dev;
- int ret;
- dev.of_offset = node;
- ret = reset_get_by_name(&dev, "sdhci", &priv->reset_ctl);
- if (ret) {
- debug("reset_get_by_name() failed: %d\n", ret);
- return ret;
- }
- ret = clk_get_by_index(&dev, 0, &priv->clk);
- if (ret) {
- debug("clk_get_by_index() failed: %d\n", ret);
- return ret;
- }
+ ret = reset_get_by_name(dev, "sdhci", &priv->reset_ctl);
+ if (ret) {
+ debug("reset_get_by_name() failed: %d\n", ret);
+ return ret;
}
+ ret = clk_get_by_index(dev, 0, &priv->clk);
+ if (ret) {
+ debug("clk_get_by_index() failed: %d\n", ret);
+ return ret;
+ }
+
+ ret = reset_assert(&priv->reset_ctl);
+ if (ret)
+ return ret;
+ ret = clk_enable(&priv->clk);
+ if (ret)
+ return ret;
+ ret = clk_set_rate(&priv->clk, 20000000);
+ if (IS_ERR_VALUE(ret))
+ return ret;
+ ret = reset_deassert(&priv->reset_ctl);
+ if (ret)
+ return ret;
#else
- priv->mmc_id = clock_decode_periph_id(blob, node);
+ priv->mmc_id = clock_decode_periph_id(gd->fdt_blob, dev->of_offset);
if (priv->mmc_id == PERIPH_ID_NONE) {
debug("%s: could not decode periph id\n", __func__);
return -FDT_ERR_NOTFOUND;
}
-#endif
- /*
- * NOTE: mmc->bus_width is determined by mmc.c dynamically.
- * TBD: Override it with this value?
- */
- priv->width = fdtdec_get_int(blob, node, "bus-width", 0);
- if (!priv->width)
- debug("%s: no sdmmc width found\n", __func__);
-
- /* These GPIOs are optional */
- gpio_request_by_name_nodev(blob, node, "cd-gpios", 0, &priv->cd_gpio,
- GPIOD_IS_IN);
- gpio_request_by_name_nodev(blob, node, "wp-gpios", 0, &priv->wp_gpio,
- GPIOD_IS_IN);
- gpio_request_by_name_nodev(blob, node, "power-gpios", 0,
- &priv->pwr_gpio, GPIOD_IS_OUT);
- *removablep = !fdtdec_get_bool(blob, node, "non-removable");
-
- debug("%s: found controller at %p, width = %d, periph_id = %d\n",
- __func__, priv->reg, priv->width,
-#ifndef CONFIG_TEGRA186
- priv->mmc_id
-#else
- -1
+ clock_start_periph_pll(priv->mmc_id, CLOCK_ID_PERIPH, 20000000);
#endif
- );
- return 0;
-}
-/*
- * Process a list of nodes, adding them to our list of SDMMC ports.
- *
- * @param blob fdt blob
- * @param node_list list of nodes to process (any <=0 are ignored)
- * @param count number of nodes to process
- * @return 0 if ok, -1 on error
- */
-static int process_nodes(const void *blob, int node_list[], int count)
-{
- struct tegra_mmc_priv *priv;
- bool removable;
- int i, node;
-
- debug("%s: count = %d\n", __func__, count);
+ /* These GPIOs are optional */
+ gpio_request_by_name(dev, "cd-gpios", 0, &priv->cd_gpio,
+ GPIOD_IS_IN);
+ gpio_request_by_name(dev, "wp-gpios", 0, &priv->wp_gpio,
+ GPIOD_IS_IN);
+ gpio_request_by_name(dev, "power-gpios", 0,
+ &priv->pwr_gpio, GPIOD_IS_OUT);
+ if (dm_gpio_is_valid(&priv->pwr_gpio))
+ dm_gpio_set_value(&priv->pwr_gpio, 1);
- /* build mmc_host[] for each controller */
- for (i = 0; i < count; i++) {
- node = node_list[i];
- if (node <= 0)
- continue;
+ priv->mmc = mmc_create(&priv->cfg, priv);
+ if (priv->mmc == NULL)
+ return -1;
- priv = &mmc_host[i];
- priv->id = i;
+ priv->mmc->dev = dev;
+ upriv->mmc = priv->mmc;
- if (mmc_get_config(blob, node, priv, &removable)) {
- printf("%s: failed to decode dev %d\n", __func__, i);
- return -1;
- }
- do_mmc_init(i, removable);
- }
return 0;
}
-void tegra_mmc_init(void)
-{
- int node_list[CONFIG_SYS_MMC_MAX_DEVICE], count;
- const void *blob = gd->fdt_blob;
- debug("%s entry\n", __func__);
-
- /* See if any Tegra186 MMC controllers are present */
- count = fdtdec_find_aliases_for_id(blob, "mmc",
- COMPAT_NVIDIA_TEGRA186_SDMMC, node_list,
- CONFIG_SYS_MMC_MAX_DEVICE);
- debug("%s: count of Tegra186 sdhci nodes is %d\n", __func__, count);
- if (process_nodes(blob, node_list, count)) {
- printf("%s: Error processing T186 mmc node(s)!\n", __func__);
- return;
- }
-
- /* See if any Tegra210 MMC controllers are present */
- count = fdtdec_find_aliases_for_id(blob, "mmc",
- COMPAT_NVIDIA_TEGRA210_SDMMC, node_list,
- CONFIG_SYS_MMC_MAX_DEVICE);
- debug("%s: count of Tegra210 sdhci nodes is %d\n", __func__, count);
- if (process_nodes(blob, node_list, count)) {
- printf("%s: Error processing T210 mmc node(s)!\n", __func__);
- return;
- }
-
- /* See if any Tegra124 MMC controllers are present */
- count = fdtdec_find_aliases_for_id(blob, "mmc",
- COMPAT_NVIDIA_TEGRA124_SDMMC, node_list,
- CONFIG_SYS_MMC_MAX_DEVICE);
- debug("%s: count of Tegra124 sdhci nodes is %d\n", __func__, count);
- if (process_nodes(blob, node_list, count)) {
- printf("%s: Error processing T124 mmc node(s)!\n", __func__);
- return;
- }
-
- /* See if any Tegra30 MMC controllers are present */
- count = fdtdec_find_aliases_for_id(blob, "mmc",
- COMPAT_NVIDIA_TEGRA30_SDMMC, node_list,
- CONFIG_SYS_MMC_MAX_DEVICE);
- debug("%s: count of T30 sdhci nodes is %d\n", __func__, count);
- if (process_nodes(blob, node_list, count)) {
- printf("%s: Error processing T30 mmc node(s)!\n", __func__);
- return;
- }
+static const struct udevice_id tegra_mmc_ids[] = {
+ { .compatible = "nvidia,tegra20-sdhci" },
+ { .compatible = "nvidia,tegra30-sdhci" },
+ { .compatible = "nvidia,tegra114-sdhci" },
+ { .compatible = "nvidia,tegra124-sdhci" },
+ { .compatible = "nvidia,tegra210-sdhci" },
+ { .compatible = "nvidia,tegra186-sdhci" },
+ { }
+};
- /* Now look for any Tegra20 MMC controllers */
- count = fdtdec_find_aliases_for_id(blob, "mmc",
- COMPAT_NVIDIA_TEGRA20_SDMMC, node_list,
- CONFIG_SYS_MMC_MAX_DEVICE);
- debug("%s: count of T20 sdhci nodes is %d\n", __func__, count);
- if (process_nodes(blob, node_list, count)) {
- printf("%s: Error processing T20 mmc node(s)!\n", __func__);
- return;
- }
-}
+U_BOOT_DRIVER(tegra_mmc_drv) = {
+ .name = "tegra_mmc",
+ .id = UCLASS_MMC,
+ .of_match = tegra_mmc_ids,
+ .probe = tegra_mmc_probe,
+ .priv_auto_alloc_size = sizeof(struct tegra_mmc_priv),
+};
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