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u-boot/drivers/mmc/s5p_sdhci.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2012 SAMSUNG Electronics
* Jaehoon Chung <jh80.chung@samsung.com>
*/
#include <common.h>
#include <dm.h>
#include <malloc.h>
#include <sdhci.h>
#include <fdtdec.h>
#include <linux/libfdt.h>
#include <asm/gpio.h>
#include <asm/arch/mmc.h>
#include <asm/arch/clk.h>
#include <errno.h>
#include <asm/arch/pinmux.h>
#ifdef CONFIG_DM_MMC
struct s5p_sdhci_plat {
struct mmc_config cfg;
struct mmc mmc;
};
DECLARE_GLOBAL_DATA_PTR;
#endif
static char *S5P_NAME = "SAMSUNG SDHCI";
static void s5p_sdhci_set_control_reg(struct sdhci_host *host)
{
unsigned long val, ctrl;
/*
* SELCLKPADDS[17:16]
* 00 = 2mA
* 01 = 4mA
* 10 = 7mA
* 11 = 9mA
*/
sdhci_writel(host, SDHCI_CTRL4_DRIVE_MASK(0x3), SDHCI_CONTROL4);
val = sdhci_readl(host, SDHCI_CONTROL2);
val &= SDHCI_CTRL2_SELBASECLK_MASK(3);
val |= SDHCI_CTRL2_ENSTAASYNCCLR |
SDHCI_CTRL2_ENCMDCNFMSK |
SDHCI_CTRL2_ENFBCLKRX |
SDHCI_CTRL2_ENCLKOUTHOLD;
sdhci_writel(host, val, SDHCI_CONTROL2);
/*
* FCSEL3[31] FCSEL2[23] FCSEL1[15] FCSEL0[7]
* FCSel[1:0] : Rx Feedback Clock Delay Control
* Inverter delay means10ns delay if SDCLK 50MHz setting
* 01 = Delay1 (basic delay)
* 11 = Delay2 (basic delay + 2ns)
* 00 = Delay3 (inverter delay)
* 10 = Delay4 (inverter delay + 2ns)
*/
val = SDHCI_CTRL3_FCSEL0 | SDHCI_CTRL3_FCSEL1;
sdhci_writel(host, val, SDHCI_CONTROL3);
/*
* SELBASECLK[5:4]
* 00/01 = HCLK
* 10 = EPLL
* 11 = XTI or XEXTCLK
*/
ctrl = sdhci_readl(host, SDHCI_CONTROL2);
ctrl &= ~SDHCI_CTRL2_SELBASECLK_MASK(0x3);
ctrl |= SDHCI_CTRL2_SELBASECLK_MASK(0x2);
sdhci_writel(host, ctrl, SDHCI_CONTROL2);
}
static void s5p_set_clock(struct sdhci_host *host, u32 div)
{
/* ToDo : Use the Clock Framework */
set_mmc_clk(host->index, div);
}
static const struct sdhci_ops s5p_sdhci_ops = {
.set_clock = &s5p_set_clock,
.set_control_reg = &s5p_sdhci_set_control_reg,
};
static int s5p_sdhci_core_init(struct sdhci_host *host)
{
host->name = S5P_NAME;
host->quirks = SDHCI_QUIRK_NO_HISPD_BIT | SDHCI_QUIRK_BROKEN_VOLTAGE |
SDHCI_QUIRK_32BIT_DMA_ADDR |
SDHCI_QUIRK_WAIT_SEND_CMD | SDHCI_QUIRK_USE_WIDE8;
host->max_clk = 52000000;
host->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
host->ops = &s5p_sdhci_ops;
if (host->bus_width == 8)
host->host_caps |= MMC_MODE_8BIT;
#ifndef CONFIG_BLK
return add_sdhci(host, 0, 400000);
#else
return 0;
#endif
}
int s5p_sdhci_init(u32 regbase, int index, int bus_width)
{
struct sdhci_host *host = calloc(1, sizeof(struct sdhci_host));
if (!host) {
printf("sdhci__host allocation fail!\n");
return -ENOMEM;
}
host->ioaddr = (void *)regbase;
host->index = index;
host->bus_width = bus_width;
return s5p_sdhci_core_init(host);
}
#if CONFIG_IS_ENABLED(OF_CONTROL)
struct sdhci_host sdhci_host[SDHCI_MAX_HOSTS];
static int do_sdhci_init(struct sdhci_host *host)
{
int dev_id, flag, ret;
flag = host->bus_width == 8 ? PINMUX_FLAG_8BIT_MODE : PINMUX_FLAG_NONE;
dev_id = host->index + PERIPH_ID_SDMMC0;
ret = exynos_pinmux_config(dev_id, flag);
if (ret) {
printf("external SD not configured\n");
return ret;
}
if (dm_gpio_is_valid(&host->pwr_gpio)) {
dm_gpio_set_value(&host->pwr_gpio, 1);
ret = exynos_pinmux_config(dev_id, flag);
if (ret) {
debug("MMC not configured\n");
return ret;
}
}
if (dm_gpio_is_valid(&host->cd_gpio)) {
ret = dm_gpio_get_value(&host->cd_gpio);
if (ret) {
debug("no SD card detected (%d)\n", ret);
return -ENODEV;
}
}
return s5p_sdhci_core_init(host);
}
static int sdhci_get_config(const void *blob, int node, struct sdhci_host *host)
{
int bus_width, dev_id;
unsigned int base;
/* Get device id */
dev_id = pinmux_decode_periph_id(blob, node);
if (dev_id < PERIPH_ID_SDMMC0 || dev_id > PERIPH_ID_SDMMC3) {
debug("MMC: Can't get device id\n");
return -EINVAL;
}
host->index = dev_id - PERIPH_ID_SDMMC0;
/* Get bus width */
bus_width = fdtdec_get_int(blob, node, "samsung,bus-width", 0);
if (bus_width <= 0) {
debug("MMC: Can't get bus-width\n");
return -EINVAL;
}
host->bus_width = bus_width;
/* Get the base address from the device node */
base = fdtdec_get_addr(blob, node, "reg");
if (!base) {
debug("MMC: Can't get base address\n");
return -EINVAL;
}
host->ioaddr = (void *)base;
gpio_request_by_name_nodev(offset_to_ofnode(node), "pwr-gpios", 0,
&host->pwr_gpio, GPIOD_IS_OUT);
gpio_request_by_name_nodev(offset_to_ofnode(node), "cd-gpios", 0,
&host->cd_gpio, GPIOD_IS_IN);
return 0;
}
static int process_nodes(const void *blob, int node_list[], int count)
{
struct sdhci_host *host;
int i, node, ret;
int failed = 0;
debug("%s: count = %d\n", __func__, count);
/* build sdhci_host[] for each controller */
for (i = 0; i < count; i++) {
node = node_list[i];
if (node <= 0)
continue;
host = &sdhci_host[i];
ret = sdhci_get_config(blob, node, host);
if (ret) {
printf("%s: failed to decode dev %d (%d)\n", __func__, i, ret);
failed++;
continue;
}
ret = do_sdhci_init(host);
if (ret && ret != -ENODEV) {
printf("%s: failed to initialize dev %d (%d)\n", __func__, i, ret);
failed++;
}
}
/* we only consider it an error when all nodes fail */
return (failed == count ? -1 : 0);
}
int exynos_mmc_init(const void *blob)
{
int count;
int node_list[SDHCI_MAX_HOSTS];
count = fdtdec_find_aliases_for_id(blob, "mmc",
COMPAT_SAMSUNG_EXYNOS_MMC, node_list,
SDHCI_MAX_HOSTS);
return process_nodes(blob, node_list, count);
}
#endif
#ifdef CONFIG_DM_MMC
static int s5p_sdhci_probe(struct udevice *dev)
{
struct s5p_sdhci_plat *plat = dev_get_platdata(dev);
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
struct sdhci_host *host = dev_get_priv(dev);
int ret;
ret = sdhci_get_config(gd->fdt_blob, dev_of_offset(dev), host);
if (ret)
return ret;
ret = do_sdhci_init(host);
if (ret)
return ret;
ret = sdhci_setup_cfg(&plat->cfg, host, 0, 400000);
if (ret)
return ret;
host->mmc = &plat->mmc;
host->mmc->priv = host;
host->mmc->dev = dev;
upriv->mmc = host->mmc;
return sdhci_probe(dev);
}
static int s5p_sdhci_bind(struct udevice *dev)
{
struct s5p_sdhci_plat *plat = dev_get_platdata(dev);
int ret;
ret = sdhci_bind(dev, &plat->mmc, &plat->cfg);
if (ret)
return ret;
return 0;
}
static const struct udevice_id s5p_sdhci_ids[] = {
{ .compatible = "samsung,exynos4412-sdhci"},
{ }
};
U_BOOT_DRIVER(s5p_sdhci_drv) = {
.name = "s5p_sdhci",
.id = UCLASS_MMC,
.of_match = s5p_sdhci_ids,
.bind = s5p_sdhci_bind,
.ops = &sdhci_ops,
.probe = s5p_sdhci_probe,
.priv_auto_alloc_size = sizeof(struct sdhci_host),
.platdata_auto_alloc_size = sizeof(struct s5p_sdhci_plat),
};
#endif /* CONFIG_DM_MMC */
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