mmc: sdhci-tegra: Explicitly support Tegra30
Tegra30 differs from Tegra20 in a number of ways. This patch implements a minimal set of differences in order to get the Cardhu board's SD slot and eMMC working. Given the diffs between the mainline sdhci-tegra.c and our downstream versions, I expect we'll eventually need to add many more differences, hence the seemingly heavy-weight addition of the soc_data structure. * Tegra30 doesn't need to override register access to SDHCI_HOST_VERSION or SDHCI_INT_ENABLE. * Tegra30 needs quirk SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
parent
192b537242
commit
3e44a1a7d2
|
@ -19,6 +19,7 @@
|
||||||
#include <linux/clk.h>
|
#include <linux/clk.h>
|
||||||
#include <linux/io.h>
|
#include <linux/io.h>
|
||||||
#include <linux/of.h>
|
#include <linux/of.h>
|
||||||
|
#include <linux/of_device.h>
|
||||||
#include <linux/of_gpio.h>
|
#include <linux/of_gpio.h>
|
||||||
#include <linux/gpio.h>
|
#include <linux/gpio.h>
|
||||||
#include <linux/mmc/card.h>
|
#include <linux/mmc/card.h>
|
||||||
|
@ -32,6 +33,19 @@
|
||||||
|
|
||||||
#include "sdhci-pltfm.h"
|
#include "sdhci-pltfm.h"
|
||||||
|
|
||||||
|
#define NVQUIRK_FORCE_SDHCI_SPEC_200 BIT(0)
|
||||||
|
#define NVQUIRK_ENABLE_BLOCK_GAP_DET BIT(1)
|
||||||
|
|
||||||
|
struct sdhci_tegra_soc_data {
|
||||||
|
struct sdhci_pltfm_data *pdata;
|
||||||
|
u32 nvquirks;
|
||||||
|
};
|
||||||
|
|
||||||
|
struct sdhci_tegra {
|
||||||
|
const struct tegra_sdhci_platform_data *plat;
|
||||||
|
const struct sdhci_tegra_soc_data *soc_data;
|
||||||
|
};
|
||||||
|
|
||||||
static u32 tegra_sdhci_readl(struct sdhci_host *host, int reg)
|
static u32 tegra_sdhci_readl(struct sdhci_host *host, int reg)
|
||||||
{
|
{
|
||||||
u32 val;
|
u32 val;
|
||||||
|
@ -47,7 +61,12 @@ static u32 tegra_sdhci_readl(struct sdhci_host *host, int reg)
|
||||||
|
|
||||||
static u16 tegra_sdhci_readw(struct sdhci_host *host, int reg)
|
static u16 tegra_sdhci_readw(struct sdhci_host *host, int reg)
|
||||||
{
|
{
|
||||||
if (unlikely(reg == SDHCI_HOST_VERSION)) {
|
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
|
||||||
|
struct sdhci_tegra *tegra_host = pltfm_host->priv;
|
||||||
|
const struct sdhci_tegra_soc_data *soc_data = tegra_host->soc_data;
|
||||||
|
|
||||||
|
if (unlikely((soc_data->nvquirks & NVQUIRK_FORCE_SDHCI_SPEC_200) &&
|
||||||
|
(reg == SDHCI_HOST_VERSION))) {
|
||||||
/* Erratum: Version register is invalid in HW. */
|
/* Erratum: Version register is invalid in HW. */
|
||||||
return SDHCI_SPEC_200;
|
return SDHCI_SPEC_200;
|
||||||
}
|
}
|
||||||
|
@ -57,6 +76,10 @@ static u16 tegra_sdhci_readw(struct sdhci_host *host, int reg)
|
||||||
|
|
||||||
static void tegra_sdhci_writel(struct sdhci_host *host, u32 val, int reg)
|
static void tegra_sdhci_writel(struct sdhci_host *host, u32 val, int reg)
|
||||||
{
|
{
|
||||||
|
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
|
||||||
|
struct sdhci_tegra *tegra_host = pltfm_host->priv;
|
||||||
|
const struct sdhci_tegra_soc_data *soc_data = tegra_host->soc_data;
|
||||||
|
|
||||||
/* Seems like we're getting spurious timeout and crc errors, so
|
/* Seems like we're getting spurious timeout and crc errors, so
|
||||||
* disable signalling of them. In case of real errors software
|
* disable signalling of them. In case of real errors software
|
||||||
* timers should take care of eventually detecting them.
|
* timers should take care of eventually detecting them.
|
||||||
|
@ -66,7 +89,8 @@ static void tegra_sdhci_writel(struct sdhci_host *host, u32 val, int reg)
|
||||||
|
|
||||||
writel(val, host->ioaddr + reg);
|
writel(val, host->ioaddr + reg);
|
||||||
|
|
||||||
if (unlikely(reg == SDHCI_INT_ENABLE)) {
|
if (unlikely((soc_data->nvquirks & NVQUIRK_ENABLE_BLOCK_GAP_DET) &&
|
||||||
|
(reg == SDHCI_INT_ENABLE))) {
|
||||||
/* Erratum: Must enable block gap interrupt detection */
|
/* Erratum: Must enable block gap interrupt detection */
|
||||||
u8 gap_ctrl = readb(host->ioaddr + SDHCI_BLOCK_GAP_CONTROL);
|
u8 gap_ctrl = readb(host->ioaddr + SDHCI_BLOCK_GAP_CONTROL);
|
||||||
if (val & SDHCI_INT_CARD_INT)
|
if (val & SDHCI_INT_CARD_INT)
|
||||||
|
@ -77,10 +101,11 @@ static void tegra_sdhci_writel(struct sdhci_host *host, u32 val, int reg)
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
static unsigned int tegra_sdhci_get_ro(struct sdhci_host *sdhci)
|
static unsigned int tegra_sdhci_get_ro(struct sdhci_host *host)
|
||||||
{
|
{
|
||||||
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(sdhci);
|
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
|
||||||
struct tegra_sdhci_platform_data *plat = pltfm_host->priv;
|
struct sdhci_tegra *tegra_host = pltfm_host->priv;
|
||||||
|
const struct tegra_sdhci_platform_data *plat = tegra_host->plat;
|
||||||
|
|
||||||
if (!gpio_is_valid(plat->wp_gpio))
|
if (!gpio_is_valid(plat->wp_gpio))
|
||||||
return -1;
|
return -1;
|
||||||
|
@ -99,7 +124,8 @@ static irqreturn_t carddetect_irq(int irq, void *data)
|
||||||
static int tegra_sdhci_8bit(struct sdhci_host *host, int bus_width)
|
static int tegra_sdhci_8bit(struct sdhci_host *host, int bus_width)
|
||||||
{
|
{
|
||||||
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
|
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
|
||||||
struct tegra_sdhci_platform_data *plat = pltfm_host->priv;
|
struct sdhci_tegra *tegra_host = pltfm_host->priv;
|
||||||
|
const struct tegra_sdhci_platform_data *plat = tegra_host->plat;
|
||||||
u32 ctrl;
|
u32 ctrl;
|
||||||
|
|
||||||
ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
|
ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
|
||||||
|
@ -125,7 +151,8 @@ static struct sdhci_ops tegra_sdhci_ops = {
|
||||||
.platform_8bit_width = tegra_sdhci_8bit,
|
.platform_8bit_width = tegra_sdhci_8bit,
|
||||||
};
|
};
|
||||||
|
|
||||||
static struct sdhci_pltfm_data sdhci_tegra_pdata = {
|
#ifdef CONFIG_ARCH_TEGRA_2x_SOC
|
||||||
|
static struct sdhci_pltfm_data sdhci_tegra20_pdata = {
|
||||||
.quirks = SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
|
.quirks = SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
|
||||||
SDHCI_QUIRK_SINGLE_POWER_WRITE |
|
SDHCI_QUIRK_SINGLE_POWER_WRITE |
|
||||||
SDHCI_QUIRK_NO_HISPD_BIT |
|
SDHCI_QUIRK_NO_HISPD_BIT |
|
||||||
|
@ -133,8 +160,35 @@ static struct sdhci_pltfm_data sdhci_tegra_pdata = {
|
||||||
.ops = &tegra_sdhci_ops,
|
.ops = &tegra_sdhci_ops,
|
||||||
};
|
};
|
||||||
|
|
||||||
|
static struct sdhci_tegra_soc_data soc_data_tegra20 = {
|
||||||
|
.pdata = &sdhci_tegra20_pdata,
|
||||||
|
.nvquirks = NVQUIRK_FORCE_SDHCI_SPEC_200 |
|
||||||
|
NVQUIRK_ENABLE_BLOCK_GAP_DET,
|
||||||
|
};
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#ifdef CONFIG_ARCH_TEGRA_3x_SOC
|
||||||
|
static struct sdhci_pltfm_data sdhci_tegra30_pdata = {
|
||||||
|
.quirks = SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
|
||||||
|
SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK |
|
||||||
|
SDHCI_QUIRK_SINGLE_POWER_WRITE |
|
||||||
|
SDHCI_QUIRK_NO_HISPD_BIT |
|
||||||
|
SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC,
|
||||||
|
.ops = &tegra_sdhci_ops,
|
||||||
|
};
|
||||||
|
|
||||||
|
static struct sdhci_tegra_soc_data soc_data_tegra30 = {
|
||||||
|
.pdata = &sdhci_tegra30_pdata,
|
||||||
|
};
|
||||||
|
#endif
|
||||||
|
|
||||||
static const struct of_device_id sdhci_tegra_dt_match[] __devinitdata = {
|
static const struct of_device_id sdhci_tegra_dt_match[] __devinitdata = {
|
||||||
{ .compatible = "nvidia,tegra20-sdhci", },
|
#ifdef CONFIG_ARCH_TEGRA_3x_SOC
|
||||||
|
{ .compatible = "nvidia,tegra30-sdhci", .data = &soc_data_tegra30 },
|
||||||
|
#endif
|
||||||
|
#ifdef CONFIG_ARCH_TEGRA_2x_SOC
|
||||||
|
{ .compatible = "nvidia,tegra20-sdhci", .data = &soc_data_tegra20 },
|
||||||
|
#endif
|
||||||
{}
|
{}
|
||||||
};
|
};
|
||||||
MODULE_DEVICE_TABLE(of, sdhci_dt_ids);
|
MODULE_DEVICE_TABLE(of, sdhci_dt_ids);
|
||||||
|
@ -165,13 +219,22 @@ static struct tegra_sdhci_platform_data * __devinit sdhci_tegra_dt_parse_pdata(
|
||||||
|
|
||||||
static int __devinit sdhci_tegra_probe(struct platform_device *pdev)
|
static int __devinit sdhci_tegra_probe(struct platform_device *pdev)
|
||||||
{
|
{
|
||||||
|
const struct of_device_id *match;
|
||||||
|
const struct sdhci_tegra_soc_data *soc_data;
|
||||||
|
struct sdhci_host *host;
|
||||||
struct sdhci_pltfm_host *pltfm_host;
|
struct sdhci_pltfm_host *pltfm_host;
|
||||||
struct tegra_sdhci_platform_data *plat;
|
struct tegra_sdhci_platform_data *plat;
|
||||||
struct sdhci_host *host;
|
struct sdhci_tegra *tegra_host;
|
||||||
struct clk *clk;
|
struct clk *clk;
|
||||||
int rc;
|
int rc;
|
||||||
|
|
||||||
host = sdhci_pltfm_init(pdev, &sdhci_tegra_pdata);
|
match = of_match_device(sdhci_tegra_dt_match, &pdev->dev);
|
||||||
|
if (match)
|
||||||
|
soc_data = match->data;
|
||||||
|
else
|
||||||
|
soc_data = &soc_data_tegra20;
|
||||||
|
|
||||||
|
host = sdhci_pltfm_init(pdev, soc_data->pdata);
|
||||||
if (IS_ERR(host))
|
if (IS_ERR(host))
|
||||||
return PTR_ERR(host);
|
return PTR_ERR(host);
|
||||||
|
|
||||||
|
@ -188,7 +251,17 @@ static int __devinit sdhci_tegra_probe(struct platform_device *pdev)
|
||||||
goto err_no_plat;
|
goto err_no_plat;
|
||||||
}
|
}
|
||||||
|
|
||||||
pltfm_host->priv = plat;
|
tegra_host = devm_kzalloc(&pdev->dev, sizeof(*tegra_host), GFP_KERNEL);
|
||||||
|
if (!tegra_host) {
|
||||||
|
dev_err(mmc_dev(host->mmc), "failed to allocate tegra_host\n");
|
||||||
|
rc = -ENOMEM;
|
||||||
|
goto err_no_plat;
|
||||||
|
}
|
||||||
|
|
||||||
|
tegra_host->plat = plat;
|
||||||
|
tegra_host->soc_data = soc_data;
|
||||||
|
|
||||||
|
pltfm_host->priv = tegra_host;
|
||||||
|
|
||||||
if (gpio_is_valid(plat->power_gpio)) {
|
if (gpio_is_valid(plat->power_gpio)) {
|
||||||
rc = gpio_request(plat->power_gpio, "sdhci_power");
|
rc = gpio_request(plat->power_gpio, "sdhci_power");
|
||||||
|
@ -284,7 +357,8 @@ static int __devexit sdhci_tegra_remove(struct platform_device *pdev)
|
||||||
{
|
{
|
||||||
struct sdhci_host *host = platform_get_drvdata(pdev);
|
struct sdhci_host *host = platform_get_drvdata(pdev);
|
||||||
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
|
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
|
||||||
struct tegra_sdhci_platform_data *plat = pltfm_host->priv;
|
struct sdhci_tegra *tegra_host = pltfm_host->priv;
|
||||||
|
const struct tegra_sdhci_platform_data *plat = tegra_host->plat;
|
||||||
int dead = (readl(host->ioaddr + SDHCI_INT_STATUS) == 0xffffffff);
|
int dead = (readl(host->ioaddr + SDHCI_INT_STATUS) == 0xffffffff);
|
||||||
|
|
||||||
sdhci_remove_host(host, dead);
|
sdhci_remove_host(host, dead);
|
||||||
|
@ -327,5 +401,5 @@ static struct platform_driver sdhci_tegra_driver = {
|
||||||
module_platform_driver(sdhci_tegra_driver);
|
module_platform_driver(sdhci_tegra_driver);
|
||||||
|
|
||||||
MODULE_DESCRIPTION("SDHCI driver for Tegra");
|
MODULE_DESCRIPTION("SDHCI driver for Tegra");
|
||||||
MODULE_AUTHOR(" Google, Inc.");
|
MODULE_AUTHOR("Google, Inc.");
|
||||||
MODULE_LICENSE("GPL v2");
|
MODULE_LICENSE("GPL v2");
|
||||||
|
|
Loading…
Reference in New Issue