+// SPDX-License-Identifier: GPL-2.0+
/*
- * (C) Copyright 2013 Inc.
+ * (C) Copyright 2013 - 2015 Xilinx, Inc.
*
* Xilinx Zynq SD Host Controller Interface
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
+#include <clk.h>
#include <common.h>
+#include <dm.h>
#include <fdtdec.h>
-#include <libfdt.h>
+#include "mmc_private.h"
+#include <linux/libfdt.h>
#include <malloc.h>
#include <sdhci.h>
-#include <asm/arch/sys_proto.h>
+#include <zynqmp_tap_delay.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct arasan_sdhci_plat {
+ struct mmc_config cfg;
+ struct mmc mmc;
+ unsigned int f_max;
+};
+
+struct arasan_sdhci_priv {
+ struct sdhci_host *host;
+ u8 deviceid;
+ u8 bank;
+ u8 no_1p8;
+ bool pwrseq;
+};
+
+#if defined(CONFIG_ARCH_ZYNQMP)
+#define MMC_HS200_BUS_SPEED 5
+
+static const u8 mode2timing[] = {
+ [MMC_LEGACY] = UHS_SDR12_BUS_SPEED,
+ [SD_LEGACY] = UHS_SDR12_BUS_SPEED,
+ [MMC_HS] = HIGH_SPEED_BUS_SPEED,
+ [SD_HS] = HIGH_SPEED_BUS_SPEED,
+ [MMC_HS_52] = HIGH_SPEED_BUS_SPEED,
+ [MMC_DDR_52] = HIGH_SPEED_BUS_SPEED,
+ [UHS_SDR12] = UHS_SDR12_BUS_SPEED,
+ [UHS_SDR25] = UHS_SDR25_BUS_SPEED,
+ [UHS_SDR50] = UHS_SDR50_BUS_SPEED,
+ [UHS_DDR50] = UHS_DDR50_BUS_SPEED,
+ [UHS_SDR104] = UHS_SDR104_BUS_SPEED,
+ [MMC_HS_200] = MMC_HS200_BUS_SPEED,
+};
-int zynq_sdhci_init(phys_addr_t regbase)
+#define SDHCI_HOST_CTRL2 0x3E
+#define SDHCI_CTRL2_MODE_MASK 0x7
+#define SDHCI_18V_SIGNAL 0x8
+#define SDHCI_CTRL_EXEC_TUNING 0x0040
+#define SDHCI_CTRL_TUNED_CLK 0x80
+#define SDHCI_TUNING_LOOP_COUNT 40
+
+static void arasan_zynqmp_dll_reset(struct sdhci_host *host, u8 deviceid)
{
- struct sdhci_host *host = NULL;
+ u16 clk;
+ unsigned long timeout;
+
+ clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
+ clk &= ~(SDHCI_CLOCK_CARD_EN);
+ sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
+
+ /* Issue DLL Reset */
+ zynqmp_dll_reset(deviceid);
- host = (struct sdhci_host *)malloc(sizeof(struct sdhci_host));
- if (!host) {
- printf("zynq_sdhci_init: sdhci_host malloc fail\n");
- return 1;
+ /* Wait max 20 ms */
+ timeout = 100;
+ while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL))
+ & SDHCI_CLOCK_INT_STABLE)) {
+ if (timeout == 0) {
+ dev_err(mmc_dev(host->mmc),
+ ": Internal clock never stabilised.\n");
+ return;
+ }
+ timeout--;
+ udelay(1000);
}
- host->name = "zynq_sdhci";
- host->ioaddr = (void *)regbase;
- host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD |
- SDHCI_QUIRK_BROKEN_R1B;
- host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
+ clk |= SDHCI_CLOCK_CARD_EN;
+ sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
+}
+
+static int arasan_sdhci_execute_tuning(struct mmc *mmc, u8 opcode)
+{
+ struct mmc_cmd cmd;
+ struct mmc_data data;
+ u32 ctrl;
+ struct sdhci_host *host;
+ struct arasan_sdhci_priv *priv = dev_get_priv(mmc->dev);
+ char tuning_loop_counter = SDHCI_TUNING_LOOP_COUNT;
+ u8 deviceid;
+
+ debug("%s\n", __func__);
+
+ host = priv->host;
+ deviceid = priv->deviceid;
+
+ ctrl = sdhci_readw(host, SDHCI_HOST_CTRL2);
+ ctrl |= SDHCI_CTRL_EXEC_TUNING;
+ sdhci_writew(host, ctrl, SDHCI_HOST_CTRL2);
+
+ mdelay(1);
+
+ arasan_zynqmp_dll_reset(host, deviceid);
+
+ sdhci_writel(host, SDHCI_INT_DATA_AVAIL, SDHCI_INT_ENABLE);
+ sdhci_writel(host, SDHCI_INT_DATA_AVAIL, SDHCI_SIGNAL_ENABLE);
+
+ do {
+ cmd.cmdidx = opcode;
+ cmd.resp_type = MMC_RSP_R1;
+ cmd.cmdarg = 0;
+
+ data.blocksize = 64;
+ data.blocks = 1;
+ data.flags = MMC_DATA_READ;
+
+ if (tuning_loop_counter-- == 0)
+ break;
+
+ if (cmd.cmdidx == MMC_CMD_SEND_TUNING_BLOCK_HS200 &&
+ mmc->bus_width == 8)
+ data.blocksize = 128;
+
+ sdhci_writew(host, SDHCI_MAKE_BLKSZ(SDHCI_DEFAULT_BOUNDARY_ARG,
+ data.blocksize),
+ SDHCI_BLOCK_SIZE);
+ sdhci_writew(host, data.blocks, SDHCI_BLOCK_COUNT);
+ sdhci_writew(host, SDHCI_TRNS_READ, SDHCI_TRANSFER_MODE);
+
+ mmc_send_cmd(mmc, &cmd, NULL);
+ ctrl = sdhci_readw(host, SDHCI_HOST_CTRL2);
+
+ if (cmd.cmdidx == MMC_CMD_SEND_TUNING_BLOCK)
+ udelay(1);
+
+ } while (ctrl & SDHCI_CTRL_EXEC_TUNING);
+
+ if (tuning_loop_counter < 0) {
+ ctrl &= ~SDHCI_CTRL_TUNED_CLK;
+ sdhci_writel(host, ctrl, SDHCI_HOST_CTRL2);
+ }
+
+ if (!(ctrl & SDHCI_CTRL_TUNED_CLK)) {
+ printf("%s:Tuning failed\n", __func__);
+ return -1;
+ }
+
+ udelay(1);
+ arasan_zynqmp_dll_reset(host, deviceid);
+
+ /* Enable only interrupts served by the SD controller */
+ sdhci_writel(host, SDHCI_INT_DATA_MASK | SDHCI_INT_CMD_MASK,
+ SDHCI_INT_ENABLE);
+ /* Mask all sdhci interrupt sources */
+ sdhci_writel(host, 0x0, SDHCI_SIGNAL_ENABLE);
- add_sdhci(host, CONFIG_ZYNQ_SDHCI_MAX_FREQ, 0);
return 0;
}
-#if CONFIG_IS_ENABLED(OF_CONTROL)
-int zynq_sdhci_of_init(const void *blob)
+static void arasan_sdhci_set_tapdelay(struct sdhci_host *host)
{
- int offset = 0;
- u32 ret = 0;
- phys_addr_t reg;
+ struct arasan_sdhci_priv *priv = dev_get_priv(host->mmc->dev);
+ struct mmc *mmc = (struct mmc *)host->mmc;
+ u8 uhsmode;
- debug("ZYNQ SDHCI: Initialization\n");
+ uhsmode = mode2timing[mmc->selected_mode];
- do {
- offset = fdt_node_offset_by_compatible(blob, offset,
- "arasan,sdhci-8.9a");
- if (offset != -1) {
- reg = fdtdec_get_addr(blob, offset, "reg");
- if (reg != FDT_ADDR_T_NONE) {
- ret |= zynq_sdhci_init(reg);
- } else {
- debug("ZYNQ SDHCI: Can't get base address\n");
- return -1;
- }
+ if (uhsmode >= UHS_SDR25_BUS_SPEED)
+ arasan_zynqmp_set_tapdelay(priv->deviceid, uhsmode,
+ priv->bank);
+}
+
+static void arasan_sdhci_set_control_reg(struct sdhci_host *host)
+{
+ struct mmc *mmc = (struct mmc *)host->mmc;
+ u32 reg;
+
+ if (!IS_SD(mmc))
+ return;
+
+ if (mmc->signal_voltage == MMC_SIGNAL_VOLTAGE_180) {
+ reg = sdhci_readw(host, SDHCI_HOST_CTRL2);
+ reg |= SDHCI_18V_SIGNAL;
+ sdhci_writew(host, reg, SDHCI_HOST_CTRL2);
+ }
+
+ if (mmc->selected_mode > SD_HS &&
+ mmc->selected_mode <= UHS_DDR50) {
+ reg = sdhci_readw(host, SDHCI_HOST_CTRL2);
+ reg &= ~SDHCI_CTRL2_MODE_MASK;
+ switch (mmc->selected_mode) {
+ case UHS_SDR12:
+ reg |= UHS_SDR12_BUS_SPEED;
+ break;
+ case UHS_SDR25:
+ reg |= UHS_SDR25_BUS_SPEED;
+ break;
+ case UHS_SDR50:
+ reg |= UHS_SDR50_BUS_SPEED;
+ break;
+ case UHS_SDR104:
+ reg |= UHS_SDR104_BUS_SPEED;
+ break;
+ case UHS_DDR50:
+ reg |= UHS_DDR50_BUS_SPEED;
+ break;
+ default:
+ break;
}
- } while (offset != -1);
+ sdhci_writew(host, reg, SDHCI_HOST_CTRL2);
+ }
+}
+#endif
- return ret;
+#if defined(CONFIG_DM_MMC) && defined(CONFIG_ARCH_ZYNQMP)
+const struct sdhci_ops arasan_ops = {
+ .platform_execute_tuning = &arasan_sdhci_execute_tuning,
+ .set_delay = &arasan_sdhci_set_tapdelay,
+ .set_control_reg = &arasan_sdhci_set_control_reg,
+};
+#endif
+
+static int arasan_sdhci_probe(struct udevice *dev)
+{
+ struct arasan_sdhci_plat *plat = dev_get_platdata(dev);
+ struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
+ struct arasan_sdhci_priv *priv = dev_get_priv(dev);
+ struct sdhci_host *host;
+ struct clk clk;
+ unsigned long clock;
+ int ret;
+
+ host = priv->host;
+
+ ret = clk_get_by_index(dev, 0, &clk);
+ if (ret < 0) {
+ dev_err(dev, "failed to get clock\n");
+ return ret;
+ }
+
+ clock = clk_get_rate(&clk);
+ if (IS_ERR_VALUE(clock)) {
+ dev_err(dev, "failed to get rate\n");
+ return clock;
+ }
+
+ debug("%s: CLK %ld\n", __func__, clock);
+
+ ret = clk_enable(&clk);
+ if (ret && ret != -ENOSYS) {
+ dev_err(dev, "failed to enable clock\n");
+ return ret;
+ }
+
+ host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD |
+ SDHCI_QUIRK_BROKEN_R1B;
+
+#ifdef CONFIG_ZYNQ_HISPD_BROKEN
+ host->quirks |= SDHCI_QUIRK_BROKEN_HISPD_MODE;
+#endif
+
+ if (priv->no_1p8)
+ host->quirks |= SDHCI_QUIRK_NO_1_8_V;
+
+ host->max_clk = clock;
+
+ ret = sdhci_setup_cfg(&plat->cfg, host, plat->f_max,
+ CONFIG_ZYNQ_SDHCI_MIN_FREQ);
+ host->mmc = &plat->mmc;
+ if (ret)
+ return ret;
+ host->mmc->priv = host;
+ host->mmc->dev = dev;
+ upriv->mmc = host->mmc;
+
+ return sdhci_probe(dev);
}
+
+static int arasan_sdhci_ofdata_to_platdata(struct udevice *dev)
+{
+ struct arasan_sdhci_plat *plat = dev_get_platdata(dev);
+ struct arasan_sdhci_priv *priv = dev_get_priv(dev);
+
+ priv->host = calloc(1, sizeof(struct sdhci_host));
+ if (!priv->host)
+ return -1;
+
+ priv->host->name = dev->name;
+
+#if defined(CONFIG_DM_MMC) && defined(CONFIG_ARCH_ZYNQMP)
+ priv->host->ops = &arasan_ops;
#endif
+
+ priv->host->ioaddr = (void *)dev_read_addr(dev);
+ if (IS_ERR(priv->host->ioaddr))
+ return PTR_ERR(priv->host->ioaddr);
+
+ priv->deviceid = dev_read_u32_default(dev, "xlnx,device_id", -1);
+ priv->bank = dev_read_u32_default(dev, "xlnx,mio_bank", -1);
+ priv->no_1p8 = dev_read_bool(dev, "no-1-8-v");
+
+ plat->f_max = dev_read_u32_default(dev, "max-frequency",
+ CONFIG_ZYNQ_SDHCI_MAX_FREQ);
+ return 0;
+}
+
+static int arasan_sdhci_bind(struct udevice *dev)
+{
+ struct arasan_sdhci_plat *plat = dev_get_platdata(dev);
+
+ return sdhci_bind(dev, &plat->mmc, &plat->cfg);
+}
+
+static const struct udevice_id arasan_sdhci_ids[] = {
+ { .compatible = "arasan,sdhci-8.9a" },
+ { }
+};
+
+U_BOOT_DRIVER(arasan_sdhci_drv) = {
+ .name = "arasan_sdhci",
+ .id = UCLASS_MMC,
+ .of_match = arasan_sdhci_ids,
+ .ofdata_to_platdata = arasan_sdhci_ofdata_to_platdata,
+ .ops = &sdhci_ops,
+ .bind = arasan_sdhci_bind,
+ .probe = arasan_sdhci_probe,
+ .priv_auto_alloc_size = sizeof(struct arasan_sdhci_priv),
+ .platdata_auto_alloc_size = sizeof(struct arasan_sdhci_plat),
+};