+// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2012 SAMSUNG Electronics
* Jaehoon Chung <jh80.chung@samsung.com>
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dwmmc.h>
#include <fdtdec.h>
-#include <libfdt.h>
+#include <linux/libfdt.h>
#include <malloc.h>
+#include <errno.h>
#include <asm/arch/dwmmc.h>
#include <asm/arch/clk.h>
#include <asm/arch/pinmux.h>
+#include <asm/arch/power.h>
#include <asm/gpio.h>
-#include <asm-generic/errno.h>
#define DWMMC_MAX_CH_NUM 4
#define DWMMC_MAX_FREQ 52000000
#define DWMMC_MIN_FREQ 400000
-#define DWMMC_MMC0_CLKSEL_VAL 0x03030001
-#define DWMMC_MMC2_CLKSEL_VAL 0x03020001
+#define DWMMC_MMC0_SDR_TIMING_VAL 0x03030001
+#define DWMMC_MMC2_SDR_TIMING_VAL 0x03020001
+
+#ifdef CONFIG_DM_MMC
+#include <dm.h>
+DECLARE_GLOBAL_DATA_PTR;
+
+struct exynos_mmc_plat {
+ struct mmc_config cfg;
+ struct mmc mmc;
+};
+#endif
+
+/* Exynos implmentation specific drver private data */
+struct dwmci_exynos_priv_data {
+#ifdef CONFIG_DM_MMC
+ struct dwmci_host host;
+#endif
+ u32 sdr_timing;
+};
/*
* Function used as callback function to initialise the
*/
static void exynos_dwmci_clksel(struct dwmci_host *host)
{
- dwmci_writel(host, DWMCI_CLKSEL, host->clksel_val);
+ struct dwmci_exynos_priv_data *priv = host->priv;
+
+ dwmci_writel(host, DWMCI_CLKSEL, priv->sdr_timing);
}
-unsigned int exynos_dwmci_get_clk(struct dwmci_host *host)
+unsigned int exynos_dwmci_get_clk(struct dwmci_host *host, uint freq)
{
unsigned long sclk;
int8_t clk_div;
static void exynos_dwmci_board_init(struct dwmci_host *host)
{
+ struct dwmci_exynos_priv_data *priv = host->priv;
+
if (host->quirks & DWMCI_QUIRK_DISABLE_SMU) {
dwmci_writel(host, EMMCP_MPSBEGIN0, 0);
dwmci_writel(host, EMMCP_SEND0, 0);
MPSCTRL_NON_SECURE_READ_BIT |
MPSCTRL_NON_SECURE_WRITE_BIT | MPSCTRL_VALID);
}
+
+ /* Set to timing value at initial time */
+ if (priv->sdr_timing)
+ exynos_dwmci_clksel(host);
}
-static int exynos_dwmci_core_init(struct dwmci_host *host, int index)
+static int exynos_dwmci_core_init(struct dwmci_host *host)
{
unsigned int div;
unsigned long freq, sclk;
freq = DWMMC_MAX_FREQ;
/* request mmc clock vlaue of 52MHz. */
- sclk = get_mmc_clk(index);
+ sclk = get_mmc_clk(host->dev_index);
div = DIV_ROUND_UP(sclk, freq);
/* set the clock divisor for mmc */
- set_mmc_clk(index, div);
+ set_mmc_clk(host->dev_index, div);
host->name = "EXYNOS DWMMC";
#ifdef CONFIG_EXYNOS5420
#endif
host->board_init = exynos_dwmci_board_init;
- if (!host->clksel_val) {
- if (index == 0)
- host->clksel_val = DWMMC_MMC0_CLKSEL_VAL;
- else if (index == 2)
- host->clksel_val = DWMMC_MMC2_CLKSEL_VAL;
- }
-
host->caps = MMC_MODE_DDR_52MHz;
host->clksel = exynos_dwmci_clksel;
- host->dev_index = index;
host->get_mmc_clk = exynos_dwmci_get_clk;
+
+#ifndef CONFIG_DM_MMC
/* Add the mmc channel to be registered with mmc core */
if (add_dwmci(host, DWMMC_MAX_FREQ, DWMMC_MIN_FREQ)) {
- printf("DWMMC%d registration failed\n", index);
+ printf("DWMMC%d registration failed\n", host->dev_index);
return -1;
}
- return 0;
-}
-
-/*
- * This function adds the mmc channel to be registered with mmc core.
- * index - mmc channel number.
- * regbase - register base address of mmc channel specified in 'index'.
- * bus_width - operating bus width of mmc channel specified in 'index'.
- * clksel - value to be written into CLKSEL register in case of FDT.
- * NULL in case od non-FDT.
- */
-int exynos_dwmci_add_port(int index, u32 regbase, int bus_width, u32 clksel)
-{
- struct dwmci_host *host = NULL;
-
- host = malloc(sizeof(struct dwmci_host));
- if (!host) {
- error("dwmci_host malloc fail!\n");
- return -ENOMEM;
- }
-
- host->ioaddr = (void *)regbase;
- host->buswidth = bus_width;
-
- if (clksel)
- host->clksel_val = clksel;
+#endif
- return exynos_dwmci_core_init(host, index);
+ return 0;
}
-#ifdef CONFIG_OF_CONTROL
static struct dwmci_host dwmci_host[DWMMC_MAX_CH_NUM];
static int do_dwmci_init(struct dwmci_host *host)
{
- int index, flag, err;
-
- index = host->dev_index;
+ int flag, err;
flag = host->buswidth == 8 ? PINMUX_FLAG_8BIT_MODE : PINMUX_FLAG_NONE;
err = exynos_pinmux_config(host->dev_id, flag);
if (err) {
- printf("DWMMC%d not configure\n", index);
+ printf("DWMMC%d not configure\n", host->dev_index);
return err;
}
- return exynos_dwmci_core_init(host, index);
+ return exynos_dwmci_core_init(host);
}
static int exynos_dwmci_get_config(const void *blob, int node,
struct dwmci_host *host)
{
int err = 0;
- u32 base, clksel_val, timing[3];
+ u32 base, timing[3];
+ struct dwmci_exynos_priv_data *priv;
+
+ priv = malloc(sizeof(struct dwmci_exynos_priv_data));
+ if (!priv) {
+ pr_err("dwmci_exynos_priv_data malloc fail!\n");
+ return -ENOMEM;
+ }
/* Extract device id for each mmc channel */
host->dev_id = pinmux_decode_periph_id(blob, node);
if (host->dev_index == host->dev_id)
host->dev_index = host->dev_id - PERIPH_ID_SDMMC0;
-
- /* Get the bus width from the device node */
- host->buswidth = fdtdec_get_int(blob, node, "samsung,bus-width", 0);
- if (host->buswidth <= 0) {
- printf("DWMMC%d: Can't get bus-width\n", host->dev_index);
+ if (host->dev_index > 4) {
+ printf("DWMMC%d: Can't get the dev index\n", host->dev_index);
+ free(priv);
return -EINVAL;
}
+ /* Get the bus width from the device node (Default is 4bit buswidth) */
+ host->buswidth = fdtdec_get_int(blob, node, "samsung,bus-width", 4);
+
/* Set the base address from the device node */
base = fdtdec_get_addr(blob, node, "reg");
if (!base) {
printf("DWMMC%d: Can't get base address\n", host->dev_index);
+ free(priv);
return -EINVAL;
}
host->ioaddr = (void *)base;
if (err) {
printf("DWMMC%d: Can't get sdr-timings for devider\n",
host->dev_index);
+ free(priv);
return -EINVAL;
}
- clksel_val = (DWMCI_SET_SAMPLE_CLK(timing[0]) |
+ priv->sdr_timing = (DWMCI_SET_SAMPLE_CLK(timing[0]) |
DWMCI_SET_DRV_CLK(timing[1]) |
DWMCI_SET_DIV_RATIO(timing[2]));
- if (clksel_val)
- host->clksel_val = clksel_val;
+
+ /* sdr_timing didn't assigned anything, use the default value */
+ if (!priv->sdr_timing) {
+ if (host->dev_index == 0)
+ priv->sdr_timing = DWMMC_MMC0_SDR_TIMING_VAL;
+ else if (host->dev_index == 2)
+ priv->sdr_timing = DWMMC_MMC2_SDR_TIMING_VAL;
+ }
host->fifoth_val = fdtdec_get_int(blob, node, "fifoth_val", 0);
host->bus_hz = fdtdec_get_int(blob, node, "bus_hz", 0);
host->div = fdtdec_get_int(blob, node, "div", 0);
+ host->priv = priv;
+
return 0;
}
int exynos_dwmmc_init(const void *blob)
{
- int compat_id;
int node_list[DWMMC_MAX_CH_NUM];
+ int boot_dev_node;
int err = 0, count;
- compat_id = COMPAT_SAMSUNG_EXYNOS_DWMMC;
-
count = fdtdec_find_aliases_for_id(blob, "mmc",
- compat_id, node_list, DWMMC_MAX_CH_NUM);
+ COMPAT_SAMSUNG_EXYNOS_DWMMC, node_list,
+ DWMMC_MAX_CH_NUM);
+
+ /* For DWMMC always set boot device as mmc 0 */
+ if (count >= 3 && get_boot_mode() == BOOT_MODE_SD) {
+ boot_dev_node = node_list[2];
+ node_list[2] = node_list[0];
+ node_list[0] = boot_dev_node;
+ }
+
err = exynos_dwmci_process_node(blob, node_list, count);
return err;
}
+
+#ifdef CONFIG_DM_MMC
+static int exynos_dwmmc_probe(struct udevice *dev)
+{
+ struct exynos_mmc_plat *plat = dev_get_platdata(dev);
+ struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
+ struct dwmci_exynos_priv_data *priv = dev_get_priv(dev);
+ struct dwmci_host *host = &priv->host;
+ int err;
+
+ err = exynos_dwmci_get_config(gd->fdt_blob, dev_of_offset(dev), host);
+ if (err)
+ return err;
+ err = do_dwmci_init(host);
+ if (err)
+ return err;
+
+ dwmci_setup_cfg(&plat->cfg, host, DWMMC_MAX_FREQ, DWMMC_MIN_FREQ);
+ host->mmc = &plat->mmc;
+ host->mmc->priv = &priv->host;
+ host->priv = dev;
+ upriv->mmc = host->mmc;
+
+ return dwmci_probe(dev);
+}
+
+static int exynos_dwmmc_bind(struct udevice *dev)
+{
+ struct exynos_mmc_plat *plat = dev_get_platdata(dev);
+
+ return dwmci_bind(dev, &plat->mmc, &plat->cfg);
+}
+
+static const struct udevice_id exynos_dwmmc_ids[] = {
+ { .compatible = "samsung,exynos4412-dw-mshc" },
+ { }
+};
+
+U_BOOT_DRIVER(exynos_dwmmc_drv) = {
+ .name = "exynos_dwmmc",
+ .id = UCLASS_MMC,
+ .of_match = exynos_dwmmc_ids,
+ .bind = exynos_dwmmc_bind,
+ .ops = &dm_dwmci_ops,
+ .probe = exynos_dwmmc_probe,
+ .priv_auto_alloc_size = sizeof(struct dwmci_exynos_priv_data),
+ .platdata_auto_alloc_size = sizeof(struct exynos_mmc_plat),
+};
#endif
projects / u-boot / blobdiff