+// SPDX-License-Identifier: GPL-2.0+
/*
* (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 <linux/delay.h>
+#include "mmc_private.h"
+#include <log.h>
+#include <dm/device_compat.h>
+#include <linux/err.h>
#include <linux/libfdt.h>
#include <malloc.h>
#include <sdhci.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;
+};
+
+#if defined(CONFIG_ARCH_ZYNQMP)
+#define MMC_HS200_BUS_SPEED 5
+
+static const u8 mode2timing[] = {
+ [MMC_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,
+};
+
+#define SDHCI_TUNING_LOOP_COUNT 40
+
+static void arasan_zynqmp_dll_reset(struct sdhci_host *host, u8 deviceid)
+{
+ 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);
+
+ /* 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);
+ }
+
+ 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_CONTROL2);
+ ctrl |= SDHCI_CTRL_EXEC_TUNING;
+ sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
+
+ 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_CONTROL2);
+
+ 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_CONTROL2);
+ }
+
+ 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);
+
+ return 0;
+}
+
+static void arasan_sdhci_set_tapdelay(struct sdhci_host *host)
+{
+ struct arasan_sdhci_priv *priv = dev_get_priv(host->mmc->dev);
+ struct mmc *mmc = (struct mmc *)host->mmc;
+ u8 uhsmode;
+
+ uhsmode = mode2timing[mmc->selected_mode];
+
+ 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_CONTROL2);
+ reg |= SDHCI_CTRL_VDD_180;
+ sdhci_writew(host, reg, SDHCI_HOST_CONTROL2);
+ }
+
+ if (mmc->selected_mode > SD_HS &&
+ mmc->selected_mode <= UHS_DDR50)
+ sdhci_set_uhs_timing(host);
+}
+#endif
+
+#if 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 sdhci_host *host = dev_get_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");
dev_err(dev, "failed to get rate\n");
return clock;
}
+
debug("%s: CLK %ld\n", __func__, clock);
ret = clk_enable(&clk);
SDHCI_QUIRK_BROKEN_R1B;
#ifdef CONFIG_ZYNQ_HISPD_BROKEN
- host->quirks |= SDHCI_QUIRK_NO_HISPD_BIT;
+ host->quirks |= SDHCI_QUIRK_BROKEN_HISPD_MODE;
#endif
+ plat->cfg.f_max = CONFIG_ZYNQ_SDHCI_MAX_FREQ;
+
+ ret = mmc_of_parse(dev, &plat->cfg);
+ if (ret)
+ return ret;
+
host->max_clk = clock;
- ret = sdhci_setup_cfg(&plat->cfg, host, plat->f_max,
- CONFIG_ZYNQ_SDHCI_MIN_FREQ);
host->mmc = &plat->mmc;
+ host->mmc->dev = dev;
+ host->mmc->priv = host;
+
+ ret = sdhci_setup_cfg(&plat->cfg, host, plat->cfg.f_max,
+ CONFIG_ZYNQ_SDHCI_MIN_FREQ);
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 sdhci_host *host = dev_get_priv(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_ARCH_ZYNQMP)
+ priv->host->ops = &arasan_ops;
+#endif
- host->name = dev->name;
- host->ioaddr = (void *)devfdt_get_addr(dev);
+ priv->host->ioaddr = (void *)dev_read_addr(dev);
+ if (IS_ERR(priv->host->ioaddr))
+ return PTR_ERR(priv->host->ioaddr);
- plat->f_max = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
- "max-frequency", CONFIG_ZYNQ_SDHCI_MAX_FREQ);
+ priv->deviceid = dev_read_u32_default(dev, "xlnx,device_id", -1);
+ priv->bank = dev_read_u32_default(dev, "xlnx,mio_bank", -1);
return 0;
}
.ops = &sdhci_ops,
.bind = arasan_sdhci_bind,
.probe = arasan_sdhci_probe,
- .priv_auto_alloc_size = sizeof(struct sdhci_host),
+ .priv_auto_alloc_size = sizeof(struct arasan_sdhci_priv),
.platdata_auto_alloc_size = sizeof(struct arasan_sdhci_plat),
};
projects / oweals / u-boot.git / blobdiff