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-rw-r--r--drivers/mmc/host/sdhci-of-esdhc.c1525
1 files changed, 1525 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c
new file mode 100644
index 000000000..6ae68e379
--- /dev/null
+++ b/drivers/mmc/host/sdhci-of-esdhc.c
@@ -0,0 +1,1525 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Freescale eSDHC controller driver.
+ *
+ * Copyright (c) 2007, 2010, 2012 Freescale Semiconductor, Inc.
+ * Copyright (c) 2009 MontaVista Software, Inc.
+ * Copyright 2020 NXP
+ *
+ * Authors: Xiaobo Xie <X.Xie@freescale.com>
+ * Anton Vorontsov <avorontsov@ru.mvista.com>
+ */
+
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/sys_soc.h>
+#include <linux/clk.h>
+#include <linux/ktime.h>
+#include <linux/dma-mapping.h>
+#include <linux/iopoll.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/mmc.h>
+#include "sdhci-pltfm.h"
+#include "sdhci-esdhc.h"
+
+#define VENDOR_V_22 0x12
+#define VENDOR_V_23 0x13
+
+#define MMC_TIMING_NUM (MMC_TIMING_MMC_HS400 + 1)
+
+struct esdhc_clk_fixup {
+ const unsigned int sd_dflt_max_clk;
+ const unsigned int max_clk[MMC_TIMING_NUM];
+};
+
+static const struct esdhc_clk_fixup ls1021a_esdhc_clk = {
+ .sd_dflt_max_clk = 25000000,
+ .max_clk[MMC_TIMING_MMC_HS] = 46500000,
+ .max_clk[MMC_TIMING_SD_HS] = 46500000,
+};
+
+static const struct esdhc_clk_fixup ls1046a_esdhc_clk = {
+ .sd_dflt_max_clk = 25000000,
+ .max_clk[MMC_TIMING_UHS_SDR104] = 167000000,
+ .max_clk[MMC_TIMING_MMC_HS200] = 167000000,
+};
+
+static const struct esdhc_clk_fixup ls1012a_esdhc_clk = {
+ .sd_dflt_max_clk = 25000000,
+ .max_clk[MMC_TIMING_UHS_SDR104] = 125000000,
+ .max_clk[MMC_TIMING_MMC_HS200] = 125000000,
+};
+
+static const struct esdhc_clk_fixup p1010_esdhc_clk = {
+ .sd_dflt_max_clk = 20000000,
+ .max_clk[MMC_TIMING_LEGACY] = 20000000,
+ .max_clk[MMC_TIMING_MMC_HS] = 42000000,
+ .max_clk[MMC_TIMING_SD_HS] = 40000000,
+};
+
+static const struct of_device_id sdhci_esdhc_of_match[] = {
+ { .compatible = "fsl,ls1021a-esdhc", .data = &ls1021a_esdhc_clk},
+ { .compatible = "fsl,ls1046a-esdhc", .data = &ls1046a_esdhc_clk},
+ { .compatible = "fsl,ls1012a-esdhc", .data = &ls1012a_esdhc_clk},
+ { .compatible = "fsl,p1010-esdhc", .data = &p1010_esdhc_clk},
+ { .compatible = "fsl,mpc8379-esdhc" },
+ { .compatible = "fsl,mpc8536-esdhc" },
+ { .compatible = "fsl,esdhc" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, sdhci_esdhc_of_match);
+
+struct sdhci_esdhc {
+ u8 vendor_ver;
+ u8 spec_ver;
+ bool quirk_incorrect_hostver;
+ bool quirk_limited_clk_division;
+ bool quirk_unreliable_pulse_detection;
+ bool quirk_tuning_erratum_type1;
+ bool quirk_tuning_erratum_type2;
+ bool quirk_ignore_data_inhibit;
+ bool quirk_delay_before_data_reset;
+ bool quirk_trans_complete_erratum;
+ bool in_sw_tuning;
+ unsigned int peripheral_clock;
+ const struct esdhc_clk_fixup *clk_fixup;
+ u32 div_ratio;
+};
+
+/**
+ * esdhc_read*_fixup - Fixup the value read from incompatible eSDHC register
+ * to make it compatible with SD spec.
+ *
+ * @host: pointer to sdhci_host
+ * @spec_reg: SD spec register address
+ * @value: 32bit eSDHC register value on spec_reg address
+ *
+ * In SD spec, there are 8/16/32/64 bits registers, while all of eSDHC
+ * registers are 32 bits. There are differences in register size, register
+ * address, register function, bit position and function between eSDHC spec
+ * and SD spec.
+ *
+ * Return a fixed up register value
+ */
+static u32 esdhc_readl_fixup(struct sdhci_host *host,
+ int spec_reg, u32 value)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
+ u32 ret;
+
+ /*
+ * The bit of ADMA flag in eSDHC is not compatible with standard
+ * SDHC register, so set fake flag SDHCI_CAN_DO_ADMA2 when ADMA is
+ * supported by eSDHC.
+ * And for many FSL eSDHC controller, the reset value of field
+ * SDHCI_CAN_DO_ADMA1 is 1, but some of them can't support ADMA,
+ * only these vendor version is greater than 2.2/0x12 support ADMA.
+ */
+ if ((spec_reg == SDHCI_CAPABILITIES) && (value & SDHCI_CAN_DO_ADMA1)) {
+ if (esdhc->vendor_ver > VENDOR_V_22) {
+ ret = value | SDHCI_CAN_DO_ADMA2;
+ return ret;
+ }
+ }
+
+ /*
+ * The DAT[3:0] line signal levels and the CMD line signal level are
+ * not compatible with standard SDHC register. The line signal levels
+ * DAT[7:0] are at bits 31:24 and the command line signal level is at
+ * bit 23. All other bits are the same as in the standard SDHC
+ * register.
+ */
+ if (spec_reg == SDHCI_PRESENT_STATE) {
+ ret = value & 0x000fffff;
+ ret |= (value >> 4) & SDHCI_DATA_LVL_MASK;
+ ret |= (value << 1) & SDHCI_CMD_LVL;
+
+ /*
+ * Some controllers have unreliable Data Line Active
+ * bit for commands with busy signal. This affects
+ * Command Inhibit (data) bit. Just ignore it since
+ * MMC core driver has already polled card status
+ * with CMD13 after any command with busy siganl.
+ */
+ if (esdhc->quirk_ignore_data_inhibit)
+ ret &= ~SDHCI_DATA_INHIBIT;
+ return ret;
+ }
+
+ /*
+ * DTS properties of mmc host are used to enable each speed mode
+ * according to soc and board capability. So clean up
+ * SDR50/SDR104/DDR50 support bits here.
+ */
+ if (spec_reg == SDHCI_CAPABILITIES_1) {
+ ret = value & ~(SDHCI_SUPPORT_SDR50 | SDHCI_SUPPORT_SDR104 |
+ SDHCI_SUPPORT_DDR50);
+ return ret;
+ }
+
+ ret = value;
+ return ret;
+}
+
+static u16 esdhc_readw_fixup(struct sdhci_host *host,
+ int spec_reg, u32 value)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
+ u16 ret;
+ int shift = (spec_reg & 0x2) * 8;
+
+ if (spec_reg == SDHCI_TRANSFER_MODE)
+ return pltfm_host->xfer_mode_shadow;
+
+ if (spec_reg == SDHCI_HOST_VERSION)
+ ret = value & 0xffff;
+ else
+ ret = (value >> shift) & 0xffff;
+ /* Workaround for T4240-R1.0-R2.0 eSDHC which has incorrect
+ * vendor version and spec version information.
+ */
+ if ((spec_reg == SDHCI_HOST_VERSION) &&
+ (esdhc->quirk_incorrect_hostver))
+ ret = (VENDOR_V_23 << SDHCI_VENDOR_VER_SHIFT) | SDHCI_SPEC_200;
+ return ret;
+}
+
+static u8 esdhc_readb_fixup(struct sdhci_host *host,
+ int spec_reg, u32 value)
+{
+ u8 ret;
+ u8 dma_bits;
+ int shift = (spec_reg & 0x3) * 8;
+
+ ret = (value >> shift) & 0xff;
+
+ /*
+ * "DMA select" locates at offset 0x28 in SD specification, but on
+ * P5020 or P3041, it locates at 0x29.
+ */
+ if (spec_reg == SDHCI_HOST_CONTROL) {
+ /* DMA select is 22,23 bits in Protocol Control Register */
+ dma_bits = (value >> 5) & SDHCI_CTRL_DMA_MASK;
+ /* fixup the result */
+ ret &= ~SDHCI_CTRL_DMA_MASK;
+ ret |= dma_bits;
+ }
+ return ret;
+}
+
+/**
+ * esdhc_write*_fixup - Fixup the SD spec register value so that it could be
+ * written into eSDHC register.
+ *
+ * @host: pointer to sdhci_host
+ * @spec_reg: SD spec register address
+ * @value: 8/16/32bit SD spec register value that would be written
+ * @old_value: 32bit eSDHC register value on spec_reg address
+ *
+ * In SD spec, there are 8/16/32/64 bits registers, while all of eSDHC
+ * registers are 32 bits. There are differences in register size, register
+ * address, register function, bit position and function between eSDHC spec
+ * and SD spec.
+ *
+ * Return a fixed up register value
+ */
+static u32 esdhc_writel_fixup(struct sdhci_host *host,
+ int spec_reg, u32 value, u32 old_value)
+{
+ u32 ret;
+
+ /*
+ * Enabling IRQSTATEN[BGESEN] is just to set IRQSTAT[BGE]
+ * when SYSCTL[RSTD] is set for some special operations.
+ * No any impact on other operation.
+ */
+ if (spec_reg == SDHCI_INT_ENABLE)
+ ret = value | SDHCI_INT_BLK_GAP;
+ else
+ ret = value;
+
+ return ret;
+}
+
+static u32 esdhc_writew_fixup(struct sdhci_host *host,
+ int spec_reg, u16 value, u32 old_value)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ int shift = (spec_reg & 0x2) * 8;
+ u32 ret;
+
+ switch (spec_reg) {
+ case SDHCI_TRANSFER_MODE:
+ /*
+ * Postpone this write, we must do it together with a
+ * command write that is down below. Return old value.
+ */
+ pltfm_host->xfer_mode_shadow = value;
+ return old_value;
+ case SDHCI_COMMAND:
+ ret = (value << 16) | pltfm_host->xfer_mode_shadow;
+ return ret;
+ }
+
+ ret = old_value & (~(0xffff << shift));
+ ret |= (value << shift);
+
+ if (spec_reg == SDHCI_BLOCK_SIZE) {
+ /*
+ * Two last DMA bits are reserved, and first one is used for
+ * non-standard blksz of 4096 bytes that we don't support
+ * yet. So clear the DMA boundary bits.
+ */
+ ret &= (~SDHCI_MAKE_BLKSZ(0x7, 0));
+ }
+ return ret;
+}
+
+static u32 esdhc_writeb_fixup(struct sdhci_host *host,
+ int spec_reg, u8 value, u32 old_value)
+{
+ u32 ret;
+ u32 dma_bits;
+ u8 tmp;
+ int shift = (spec_reg & 0x3) * 8;
+
+ /*
+ * eSDHC doesn't have a standard power control register, so we do
+ * nothing here to avoid incorrect operation.
+ */
+ if (spec_reg == SDHCI_POWER_CONTROL)
+ return old_value;
+ /*
+ * "DMA select" location is offset 0x28 in SD specification, but on
+ * P5020 or P3041, it's located at 0x29.
+ */
+ if (spec_reg == SDHCI_HOST_CONTROL) {
+ /*
+ * If host control register is not standard, exit
+ * this function
+ */
+ if (host->quirks2 & SDHCI_QUIRK2_BROKEN_HOST_CONTROL)
+ return old_value;
+
+ /* DMA select is 22,23 bits in Protocol Control Register */
+ dma_bits = (value & SDHCI_CTRL_DMA_MASK) << 5;
+ ret = (old_value & (~(SDHCI_CTRL_DMA_MASK << 5))) | dma_bits;
+ tmp = (value & (~SDHCI_CTRL_DMA_MASK)) |
+ (old_value & SDHCI_CTRL_DMA_MASK);
+ ret = (ret & (~0xff)) | tmp;
+
+ /* Prevent SDHCI core from writing reserved bits (e.g. HISPD) */
+ ret &= ~ESDHC_HOST_CONTROL_RES;
+ return ret;
+ }
+
+ ret = (old_value & (~(0xff << shift))) | (value << shift);
+ return ret;
+}
+
+static u32 esdhc_be_readl(struct sdhci_host *host, int reg)
+{
+ u32 ret;
+ u32 value;
+
+ if (reg == SDHCI_CAPABILITIES_1)
+ value = ioread32be(host->ioaddr + ESDHC_CAPABILITIES_1);
+ else
+ value = ioread32be(host->ioaddr + reg);
+
+ ret = esdhc_readl_fixup(host, reg, value);
+
+ return ret;
+}
+
+static u32 esdhc_le_readl(struct sdhci_host *host, int reg)
+{
+ u32 ret;
+ u32 value;
+
+ if (reg == SDHCI_CAPABILITIES_1)
+ value = ioread32(host->ioaddr + ESDHC_CAPABILITIES_1);
+ else
+ value = ioread32(host->ioaddr + reg);
+
+ ret = esdhc_readl_fixup(host, reg, value);
+
+ return ret;
+}
+
+static u16 esdhc_be_readw(struct sdhci_host *host, int reg)
+{
+ u16 ret;
+ u32 value;
+ int base = reg & ~0x3;
+
+ value = ioread32be(host->ioaddr + base);
+ ret = esdhc_readw_fixup(host, reg, value);
+ return ret;
+}
+
+static u16 esdhc_le_readw(struct sdhci_host *host, int reg)
+{
+ u16 ret;
+ u32 value;
+ int base = reg & ~0x3;
+
+ value = ioread32(host->ioaddr + base);
+ ret = esdhc_readw_fixup(host, reg, value);
+ return ret;
+}
+
+static u8 esdhc_be_readb(struct sdhci_host *host, int reg)
+{
+ u8 ret;
+ u32 value;
+ int base = reg & ~0x3;
+
+ value = ioread32be(host->ioaddr + base);
+ ret = esdhc_readb_fixup(host, reg, value);
+ return ret;
+}
+
+static u8 esdhc_le_readb(struct sdhci_host *host, int reg)
+{
+ u8 ret;
+ u32 value;
+ int base = reg & ~0x3;
+
+ value = ioread32(host->ioaddr + base);
+ ret = esdhc_readb_fixup(host, reg, value);
+ return ret;
+}
+
+static void esdhc_be_writel(struct sdhci_host *host, u32 val, int reg)
+{
+ u32 value;
+
+ value = esdhc_writel_fixup(host, reg, val, 0);
+ iowrite32be(value, host->ioaddr + reg);
+}
+
+static void esdhc_le_writel(struct sdhci_host *host, u32 val, int reg)
+{
+ u32 value;
+
+ value = esdhc_writel_fixup(host, reg, val, 0);
+ iowrite32(value, host->ioaddr + reg);
+}
+
+static void esdhc_be_writew(struct sdhci_host *host, u16 val, int reg)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
+ int base = reg & ~0x3;
+ u32 value;
+ u32 ret;
+
+ value = ioread32be(host->ioaddr + base);
+ ret = esdhc_writew_fixup(host, reg, val, value);
+ if (reg != SDHCI_TRANSFER_MODE)
+ iowrite32be(ret, host->ioaddr + base);
+
+ /* Starting SW tuning requires ESDHC_SMPCLKSEL to be set
+ * 1us later after ESDHC_EXTN is set.
+ */
+ if (base == ESDHC_SYSTEM_CONTROL_2) {
+ if (!(value & ESDHC_EXTN) && (ret & ESDHC_EXTN) &&
+ esdhc->in_sw_tuning) {
+ udelay(1);
+ ret |= ESDHC_SMPCLKSEL;
+ iowrite32be(ret, host->ioaddr + base);
+ }
+ }
+}
+
+static void esdhc_le_writew(struct sdhci_host *host, u16 val, int reg)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
+ int base = reg & ~0x3;
+ u32 value;
+ u32 ret;
+
+ value = ioread32(host->ioaddr + base);
+ ret = esdhc_writew_fixup(host, reg, val, value);
+ if (reg != SDHCI_TRANSFER_MODE)
+ iowrite32(ret, host->ioaddr + base);
+
+ /* Starting SW tuning requires ESDHC_SMPCLKSEL to be set
+ * 1us later after ESDHC_EXTN is set.
+ */
+ if (base == ESDHC_SYSTEM_CONTROL_2) {
+ if (!(value & ESDHC_EXTN) && (ret & ESDHC_EXTN) &&
+ esdhc->in_sw_tuning) {
+ udelay(1);
+ ret |= ESDHC_SMPCLKSEL;
+ iowrite32(ret, host->ioaddr + base);
+ }
+ }
+}
+
+static void esdhc_be_writeb(struct sdhci_host *host, u8 val, int reg)
+{
+ int base = reg & ~0x3;
+ u32 value;
+ u32 ret;
+
+ value = ioread32be(host->ioaddr + base);
+ ret = esdhc_writeb_fixup(host, reg, val, value);
+ iowrite32be(ret, host->ioaddr + base);
+}
+
+static void esdhc_le_writeb(struct sdhci_host *host, u8 val, int reg)
+{
+ int base = reg & ~0x3;
+ u32 value;
+ u32 ret;
+
+ value = ioread32(host->ioaddr + base);
+ ret = esdhc_writeb_fixup(host, reg, val, value);
+ iowrite32(ret, host->ioaddr + base);
+}
+
+/*
+ * For Abort or Suspend after Stop at Block Gap, ignore the ADMA
+ * error(IRQSTAT[ADMAE]) if both Transfer Complete(IRQSTAT[TC])
+ * and Block Gap Event(IRQSTAT[BGE]) are also set.
+ * For Continue, apply soft reset for data(SYSCTL[RSTD]);
+ * and re-issue the entire read transaction from beginning.
+ */
+static void esdhc_of_adma_workaround(struct sdhci_host *host, u32 intmask)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
+ bool applicable;
+ dma_addr_t dmastart;
+ dma_addr_t dmanow;
+
+ applicable = (intmask & SDHCI_INT_DATA_END) &&
+ (intmask & SDHCI_INT_BLK_GAP) &&
+ (esdhc->vendor_ver == VENDOR_V_23);
+ if (!applicable)
+ return;
+
+ host->data->error = 0;
+ dmastart = sg_dma_address(host->data->sg);
+ dmanow = dmastart + host->data->bytes_xfered;
+ /*
+ * Force update to the next DMA block boundary.
+ */
+ dmanow = (dmanow & ~(SDHCI_DEFAULT_BOUNDARY_SIZE - 1)) +
+ SDHCI_DEFAULT_BOUNDARY_SIZE;
+ host->data->bytes_xfered = dmanow - dmastart;
+ sdhci_writel(host, dmanow, SDHCI_DMA_ADDRESS);
+}
+
+static int esdhc_of_enable_dma(struct sdhci_host *host)
+{
+ int ret;
+ u32 value;
+ struct device *dev = mmc_dev(host->mmc);
+
+ if (of_device_is_compatible(dev->of_node, "fsl,ls1043a-esdhc") ||
+ of_device_is_compatible(dev->of_node, "fsl,ls1046a-esdhc")) {
+ ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(40));
+ if (ret)
+ return ret;
+ }
+
+ value = sdhci_readl(host, ESDHC_DMA_SYSCTL);
+
+ if (of_dma_is_coherent(dev->of_node))
+ value |= ESDHC_DMA_SNOOP;
+ else
+ value &= ~ESDHC_DMA_SNOOP;
+
+ sdhci_writel(host, value, ESDHC_DMA_SYSCTL);
+ return 0;
+}
+
+static unsigned int esdhc_of_get_max_clock(struct sdhci_host *host)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
+
+ if (esdhc->peripheral_clock)
+ return esdhc->peripheral_clock;
+ else
+ return pltfm_host->clock;
+}
+
+static unsigned int esdhc_of_get_min_clock(struct sdhci_host *host)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
+ unsigned int clock;
+
+ if (esdhc->peripheral_clock)
+ clock = esdhc->peripheral_clock;
+ else
+ clock = pltfm_host->clock;
+ return clock / 256 / 16;
+}
+
+static void esdhc_clock_enable(struct sdhci_host *host, bool enable)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
+ ktime_t timeout;
+ u32 val, clk_en;
+
+ clk_en = ESDHC_CLOCK_SDCLKEN;
+
+ /*
+ * IPGEN/HCKEN/PEREN bits exist on eSDHC whose vendor version
+ * is 2.2 or lower.
+ */
+ if (esdhc->vendor_ver <= VENDOR_V_22)
+ clk_en |= (ESDHC_CLOCK_IPGEN | ESDHC_CLOCK_HCKEN |
+ ESDHC_CLOCK_PEREN);
+
+ val = sdhci_readl(host, ESDHC_SYSTEM_CONTROL);
+
+ if (enable)
+ val |= clk_en;
+ else
+ val &= ~clk_en;
+
+ sdhci_writel(host, val, ESDHC_SYSTEM_CONTROL);
+
+ /*
+ * Wait max 20 ms. If vendor version is 2.2 or lower, do not
+ * wait clock stable bit which does not exist.
+ */
+ timeout = ktime_add_ms(ktime_get(), 20);
+ while (esdhc->vendor_ver > VENDOR_V_22) {
+ bool timedout = ktime_after(ktime_get(), timeout);
+
+ if (sdhci_readl(host, ESDHC_PRSSTAT) & ESDHC_CLOCK_STABLE)
+ break;
+ if (timedout) {
+ pr_err("%s: Internal clock never stabilised.\n",
+ mmc_hostname(host->mmc));
+ break;
+ }
+ usleep_range(10, 20);
+ }
+}
+
+static void esdhc_flush_async_fifo(struct sdhci_host *host)
+{
+ ktime_t timeout;
+ u32 val;
+
+ val = sdhci_readl(host, ESDHC_DMA_SYSCTL);
+ val |= ESDHC_FLUSH_ASYNC_FIFO;
+ sdhci_writel(host, val, ESDHC_DMA_SYSCTL);
+
+ /* Wait max 20 ms */
+ timeout = ktime_add_ms(ktime_get(), 20);
+ while (1) {
+ bool timedout = ktime_after(ktime_get(), timeout);
+
+ if (!(sdhci_readl(host, ESDHC_DMA_SYSCTL) &
+ ESDHC_FLUSH_ASYNC_FIFO))
+ break;
+ if (timedout) {
+ pr_err("%s: flushing asynchronous FIFO timeout.\n",
+ mmc_hostname(host->mmc));
+ break;
+ }
+ usleep_range(10, 20);
+ }
+}
+
+static void esdhc_of_set_clock(struct sdhci_host *host, unsigned int clock)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
+ unsigned int pre_div = 1, div = 1;
+ unsigned int clock_fixup = 0;
+ ktime_t timeout;
+ u32 temp;
+
+ if (clock == 0) {
+ host->mmc->actual_clock = 0;
+ esdhc_clock_enable(host, false);
+ return;
+ }
+
+ /* Start pre_div at 2 for vendor version < 2.3. */
+ if (esdhc->vendor_ver < VENDOR_V_23)
+ pre_div = 2;
+
+ /* Fix clock value. */
+ if (host->mmc->card && mmc_card_sd(host->mmc->card) &&
+ esdhc->clk_fixup && host->mmc->ios.timing == MMC_TIMING_LEGACY)
+ clock_fixup = esdhc->clk_fixup->sd_dflt_max_clk;
+ else if (esdhc->clk_fixup)
+ clock_fixup = esdhc->clk_fixup->max_clk[host->mmc->ios.timing];
+
+ if (clock_fixup == 0 || clock < clock_fixup)
+ clock_fixup = clock;
+
+ /* Calculate pre_div and div. */
+ while (host->max_clk / pre_div / 16 > clock_fixup && pre_div < 256)
+ pre_div *= 2;
+
+ while (host->max_clk / pre_div / div > clock_fixup && div < 16)
+ div++;
+
+ esdhc->div_ratio = pre_div * div;
+
+ /* Limit clock division for HS400 200MHz clock for quirk. */
+ if (esdhc->quirk_limited_clk_division &&
+ clock == MMC_HS200_MAX_DTR &&
+ (host->mmc->ios.timing == MMC_TIMING_MMC_HS400 ||
+ host->flags & SDHCI_HS400_TUNING)) {
+ if (esdhc->div_ratio <= 4) {
+ pre_div = 4;
+ div = 1;
+ } else if (esdhc->div_ratio <= 8) {
+ pre_div = 4;
+ div = 2;
+ } else if (esdhc->div_ratio <= 12) {
+ pre_div = 4;
+ div = 3;
+ } else {
+ pr_warn("%s: using unsupported clock division.\n",
+ mmc_hostname(host->mmc));
+ }
+ esdhc->div_ratio = pre_div * div;
+ }
+
+ host->mmc->actual_clock = host->max_clk / esdhc->div_ratio;
+
+ dev_dbg(mmc_dev(host->mmc), "desired SD clock: %d, actual: %d\n",
+ clock, host->mmc->actual_clock);
+
+ /* Set clock division into register. */
+ pre_div >>= 1;
+ div--;
+
+ esdhc_clock_enable(host, false);
+
+ temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL);
+ temp &= ~ESDHC_CLOCK_MASK;
+ temp |= ((div << ESDHC_DIVIDER_SHIFT) |
+ (pre_div << ESDHC_PREDIV_SHIFT));
+ sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL);
+
+ /*
+ * Wait max 20 ms. If vendor version is 2.2 or lower, do not
+ * wait clock stable bit which does not exist.
+ */
+ timeout = ktime_add_ms(ktime_get(), 20);
+ while (esdhc->vendor_ver > VENDOR_V_22) {
+ bool timedout = ktime_after(ktime_get(), timeout);
+
+ if (sdhci_readl(host, ESDHC_PRSSTAT) & ESDHC_CLOCK_STABLE)
+ break;
+ if (timedout) {
+ pr_err("%s: Internal clock never stabilised.\n",
+ mmc_hostname(host->mmc));
+ break;
+ }
+ usleep_range(10, 20);
+ }
+
+ /* Additional setting for HS400. */
+ if (host->mmc->ios.timing == MMC_TIMING_MMC_HS400 &&
+ clock == MMC_HS200_MAX_DTR) {
+ temp = sdhci_readl(host, ESDHC_TBCTL);
+ sdhci_writel(host, temp | ESDHC_HS400_MODE, ESDHC_TBCTL);
+ temp = sdhci_readl(host, ESDHC_SDCLKCTL);
+ sdhci_writel(host, temp | ESDHC_CMD_CLK_CTL, ESDHC_SDCLKCTL);
+ esdhc_clock_enable(host, true);
+
+ temp = sdhci_readl(host, ESDHC_DLLCFG0);
+ temp |= ESDHC_DLL_ENABLE;
+ if (host->mmc->actual_clock == MMC_HS200_MAX_DTR)
+ temp |= ESDHC_DLL_FREQ_SEL;
+ sdhci_writel(host, temp, ESDHC_DLLCFG0);
+
+ temp |= ESDHC_DLL_RESET;
+ sdhci_writel(host, temp, ESDHC_DLLCFG0);
+ udelay(1);
+ temp &= ~ESDHC_DLL_RESET;
+ sdhci_writel(host, temp, ESDHC_DLLCFG0);
+
+ /* Wait max 20 ms */
+ if (read_poll_timeout(sdhci_readl, temp,
+ temp & ESDHC_DLL_STS_SLV_LOCK,
+ 10, 20000, false,
+ host, ESDHC_DLLSTAT0))
+ pr_err("%s: timeout for delay chain lock.\n",
+ mmc_hostname(host->mmc));
+
+ temp = sdhci_readl(host, ESDHC_TBCTL);
+ sdhci_writel(host, temp | ESDHC_HS400_WNDW_ADJUST, ESDHC_TBCTL);
+
+ esdhc_clock_enable(host, false);
+ esdhc_flush_async_fifo(host);
+ }
+ esdhc_clock_enable(host, true);
+}
+
+static void esdhc_pltfm_set_bus_width(struct sdhci_host *host, int width)
+{
+ u32 ctrl;
+
+ ctrl = sdhci_readl(host, ESDHC_PROCTL);
+ ctrl &= (~ESDHC_CTRL_BUSWIDTH_MASK);
+ switch (width) {
+ case MMC_BUS_WIDTH_8:
+ ctrl |= ESDHC_CTRL_8BITBUS;
+ break;
+
+ case MMC_BUS_WIDTH_4:
+ ctrl |= ESDHC_CTRL_4BITBUS;
+ break;
+
+ default:
+ break;
+ }
+
+ sdhci_writel(host, ctrl, ESDHC_PROCTL);
+}
+
+static void esdhc_reset(struct sdhci_host *host, u8 mask)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
+ u32 val, bus_width = 0;
+
+ /*
+ * Add delay to make sure all the DMA transfers are finished
+ * for quirk.
+ */
+ if (esdhc->quirk_delay_before_data_reset &&
+ (mask & SDHCI_RESET_DATA) &&
+ (host->flags & SDHCI_REQ_USE_DMA))
+ mdelay(5);
+
+ /*
+ * Save bus-width for eSDHC whose vendor version is 2.2
+ * or lower for data reset.
+ */
+ if ((mask & SDHCI_RESET_DATA) &&
+ (esdhc->vendor_ver <= VENDOR_V_22)) {
+ val = sdhci_readl(host, ESDHC_PROCTL);
+ bus_width = val & ESDHC_CTRL_BUSWIDTH_MASK;
+ }
+
+ sdhci_reset(host, mask);
+
+ /*
+ * Restore bus-width setting and interrupt registers for eSDHC
+ * whose vendor version is 2.2 or lower for data reset.
+ */
+ if ((mask & SDHCI_RESET_DATA) &&
+ (esdhc->vendor_ver <= VENDOR_V_22)) {
+ val = sdhci_readl(host, ESDHC_PROCTL);
+ val &= ~ESDHC_CTRL_BUSWIDTH_MASK;
+ val |= bus_width;
+ sdhci_writel(host, val, ESDHC_PROCTL);
+
+ sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
+ sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
+ }
+
+ /*
+ * Some bits have to be cleaned manually for eSDHC whose spec
+ * version is higher than 3.0 for all reset.
+ */
+ if ((mask & SDHCI_RESET_ALL) &&
+ (esdhc->spec_ver >= SDHCI_SPEC_300)) {
+ val = sdhci_readl(host, ESDHC_TBCTL);
+ val &= ~ESDHC_TB_EN;
+ sdhci_writel(host, val, ESDHC_TBCTL);
+
+ /*
+ * Initialize eSDHC_DLLCFG1[DLL_PD_PULSE_STRETCH_SEL] to
+ * 0 for quirk.
+ */
+ if (esdhc->quirk_unreliable_pulse_detection) {
+ val = sdhci_readl(host, ESDHC_DLLCFG1);
+ val &= ~ESDHC_DLL_PD_PULSE_STRETCH_SEL;
+ sdhci_writel(host, val, ESDHC_DLLCFG1);
+ }
+ }
+}
+
+/* The SCFG, Supplemental Configuration Unit, provides SoC specific
+ * configuration and status registers for the device. There is a
+ * SDHC IO VSEL control register on SCFG for some platforms. It's
+ * used to support SDHC IO voltage switching.
+ */
+static const struct of_device_id scfg_device_ids[] = {
+ { .compatible = "fsl,t1040-scfg", },
+ { .compatible = "fsl,ls1012a-scfg", },
+ { .compatible = "fsl,ls1046a-scfg", },
+ {}
+};
+
+/* SDHC IO VSEL control register definition */
+#define SCFG_SDHCIOVSELCR 0x408
+#define SDHCIOVSELCR_TGLEN 0x80000000
+#define SDHCIOVSELCR_VSELVAL 0x60000000
+#define SDHCIOVSELCR_SDHC_VS 0x00000001
+
+static int esdhc_signal_voltage_switch(struct mmc_host *mmc,
+ struct mmc_ios *ios)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+ struct device_node *scfg_node;
+ void __iomem *scfg_base = NULL;
+ u32 sdhciovselcr;
+ u32 val;
+
+ /*
+ * Signal Voltage Switching is only applicable for Host Controllers
+ * v3.00 and above.
+ */
+ if (host->version < SDHCI_SPEC_300)
+ return 0;
+
+ val = sdhci_readl(host, ESDHC_PROCTL);
+
+ switch (ios->signal_voltage) {
+ case MMC_SIGNAL_VOLTAGE_330:
+ val &= ~ESDHC_VOLT_SEL;
+ sdhci_writel(host, val, ESDHC_PROCTL);
+ return 0;
+ case MMC_SIGNAL_VOLTAGE_180:
+ scfg_node = of_find_matching_node(NULL, scfg_device_ids);
+ if (scfg_node)
+ scfg_base = of_iomap(scfg_node, 0);
+ of_node_put(scfg_node);
+ if (scfg_base) {
+ sdhciovselcr = SDHCIOVSELCR_TGLEN |
+ SDHCIOVSELCR_VSELVAL;
+ iowrite32be(sdhciovselcr,
+ scfg_base + SCFG_SDHCIOVSELCR);
+
+ val |= ESDHC_VOLT_SEL;
+ sdhci_writel(host, val, ESDHC_PROCTL);
+ mdelay(5);
+
+ sdhciovselcr = SDHCIOVSELCR_TGLEN |
+ SDHCIOVSELCR_SDHC_VS;
+ iowrite32be(sdhciovselcr,
+ scfg_base + SCFG_SDHCIOVSELCR);
+ iounmap(scfg_base);
+ } else {
+ val |= ESDHC_VOLT_SEL;
+ sdhci_writel(host, val, ESDHC_PROCTL);
+ }
+ return 0;
+ default:
+ return 0;
+ }
+}
+
+static struct soc_device_attribute soc_tuning_erratum_type1[] = {
+ { .family = "QorIQ T1023", },
+ { .family = "QorIQ T1040", },
+ { .family = "QorIQ T2080", },
+ { .family = "QorIQ LS1021A", },
+ { /* sentinel */ }
+};
+
+static struct soc_device_attribute soc_tuning_erratum_type2[] = {
+ { .family = "QorIQ LS1012A", },
+ { .family = "QorIQ LS1043A", },
+ { .family = "QorIQ LS1046A", },
+ { .family = "QorIQ LS1080A", },
+ { .family = "QorIQ LS2080A", },
+ { .family = "QorIQ LA1575A", },
+ { /* sentinel */ }
+};
+
+static void esdhc_tuning_block_enable(struct sdhci_host *host, bool enable)
+{
+ u32 val;
+
+ esdhc_clock_enable(host, false);
+ esdhc_flush_async_fifo(host);
+
+ val = sdhci_readl(host, ESDHC_TBCTL);
+ if (enable)
+ val |= ESDHC_TB_EN;
+ else
+ val &= ~ESDHC_TB_EN;
+ sdhci_writel(host, val, ESDHC_TBCTL);
+
+ esdhc_clock_enable(host, true);
+}
+
+static void esdhc_tuning_window_ptr(struct sdhci_host *host, u8 *window_start,
+ u8 *window_end)
+{
+ u32 val;
+
+ /* Write TBCTL[11:8]=4'h8 */
+ val = sdhci_readl(host, ESDHC_TBCTL);
+ val &= ~(0xf << 8);
+ val |= 8 << 8;
+ sdhci_writel(host, val, ESDHC_TBCTL);
+
+ mdelay(1);
+
+ /* Read TBCTL[31:0] register and rewrite again */
+ val = sdhci_readl(host, ESDHC_TBCTL);
+ sdhci_writel(host, val, ESDHC_TBCTL);
+
+ mdelay(1);
+
+ /* Read the TBSTAT[31:0] register twice */
+ val = sdhci_readl(host, ESDHC_TBSTAT);
+ val = sdhci_readl(host, ESDHC_TBSTAT);
+
+ *window_end = val & 0xff;
+ *window_start = (val >> 8) & 0xff;
+}
+
+static void esdhc_prepare_sw_tuning(struct sdhci_host *host, u8 *window_start,
+ u8 *window_end)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
+ u8 start_ptr, end_ptr;
+
+ if (esdhc->quirk_tuning_erratum_type1) {
+ *window_start = 5 * esdhc->div_ratio;
+ *window_end = 3 * esdhc->div_ratio;
+ return;
+ }
+
+ esdhc_tuning_window_ptr(host, &start_ptr, &end_ptr);
+
+ /* Reset data lines by setting ESDHCCTL[RSTD] */
+ sdhci_reset(host, SDHCI_RESET_DATA);
+ /* Write 32'hFFFF_FFFF to IRQSTAT register */
+ sdhci_writel(host, 0xFFFFFFFF, SDHCI_INT_STATUS);
+
+ /* If TBSTAT[15:8]-TBSTAT[7:0] > (4 * div_ratio) + 2
+ * or TBSTAT[7:0]-TBSTAT[15:8] > (4 * div_ratio) + 2,
+ * then program TBPTR[TB_WNDW_END_PTR] = 4 * div_ratio
+ * and program TBPTR[TB_WNDW_START_PTR] = 8 * div_ratio.
+ */
+
+ if (abs(start_ptr - end_ptr) > (4 * esdhc->div_ratio + 2)) {
+ *window_start = 8 * esdhc->div_ratio;
+ *window_end = 4 * esdhc->div_ratio;
+ } else {
+ *window_start = 5 * esdhc->div_ratio;
+ *window_end = 3 * esdhc->div_ratio;
+ }
+}
+
+static int esdhc_execute_sw_tuning(struct mmc_host *mmc, u32 opcode,
+ u8 window_start, u8 window_end)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
+ u32 val;
+ int ret;
+
+ /* Program TBPTR[TB_WNDW_END_PTR] and TBPTR[TB_WNDW_START_PTR] */
+ val = ((u32)window_start << ESDHC_WNDW_STRT_PTR_SHIFT) &
+ ESDHC_WNDW_STRT_PTR_MASK;
+ val |= window_end & ESDHC_WNDW_END_PTR_MASK;
+ sdhci_writel(host, val, ESDHC_TBPTR);
+
+ /* Program the software tuning mode by setting TBCTL[TB_MODE]=2'h3 */
+ val = sdhci_readl(host, ESDHC_TBCTL);
+ val &= ~ESDHC_TB_MODE_MASK;
+ val |= ESDHC_TB_MODE_SW;
+ sdhci_writel(host, val, ESDHC_TBCTL);
+
+ esdhc->in_sw_tuning = true;
+ ret = sdhci_execute_tuning(mmc, opcode);
+ esdhc->in_sw_tuning = false;
+ return ret;
+}
+
+static int esdhc_execute_tuning(struct mmc_host *mmc, u32 opcode)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
+ u8 window_start, window_end;
+ int ret, retries = 1;
+ bool hs400_tuning;
+ unsigned int clk;
+ u32 val;
+
+ /* For tuning mode, the sd clock divisor value
+ * must be larger than 3 according to reference manual.
+ */
+ clk = esdhc->peripheral_clock / 3;
+ if (host->clock > clk)
+ esdhc_of_set_clock(host, clk);
+
+ esdhc_tuning_block_enable(host, true);
+
+ /*
+ * The eSDHC controller takes the data timeout value into account
+ * during tuning. If the SD card is too slow sending the response, the
+ * timer will expire and a "Buffer Read Ready" interrupt without data
+ * is triggered. This leads to tuning errors.
+ *
+ * Just set the timeout to the maximum value because the core will
+ * already take care of it in sdhci_send_tuning().
+ */
+ sdhci_writeb(host, 0xe, SDHCI_TIMEOUT_CONTROL);
+
+ hs400_tuning = host->flags & SDHCI_HS400_TUNING;
+
+ do {
+ if (esdhc->quirk_limited_clk_division &&
+ hs400_tuning)
+ esdhc_of_set_clock(host, host->clock);
+
+ /* Do HW tuning */
+ val = sdhci_readl(host, ESDHC_TBCTL);
+ val &= ~ESDHC_TB_MODE_MASK;
+ val |= ESDHC_TB_MODE_3;
+ sdhci_writel(host, val, ESDHC_TBCTL);
+
+ ret = sdhci_execute_tuning(mmc, opcode);
+ if (ret)
+ break;
+
+ /* For type2 affected platforms of the tuning erratum,
+ * tuning may succeed although eSDHC might not have
+ * tuned properly. Need to check tuning window.
+ */
+ if (esdhc->quirk_tuning_erratum_type2 &&
+ !host->tuning_err) {
+ esdhc_tuning_window_ptr(host, &window_start,
+ &window_end);
+ if (abs(window_start - window_end) >
+ (4 * esdhc->div_ratio + 2))
+ host->tuning_err = -EAGAIN;
+ }
+
+ /* If HW tuning fails and triggers erratum,
+ * try workaround.
+ */
+ ret = host->tuning_err;
+ if (ret == -EAGAIN &&
+ (esdhc->quirk_tuning_erratum_type1 ||
+ esdhc->quirk_tuning_erratum_type2)) {
+ /* Recover HS400 tuning flag */
+ if (hs400_tuning)
+ host->flags |= SDHCI_HS400_TUNING;
+ pr_info("%s: Hold on to use fixed sampling clock. Try SW tuning!\n",
+ mmc_hostname(mmc));
+ /* Do SW tuning */
+ esdhc_prepare_sw_tuning(host, &window_start,
+ &window_end);
+ ret = esdhc_execute_sw_tuning(mmc, opcode,
+ window_start,
+ window_end);
+ if (ret)
+ break;
+
+ /* Retry both HW/SW tuning with reduced clock. */
+ ret = host->tuning_err;
+ if (ret == -EAGAIN && retries) {
+ /* Recover HS400 tuning flag */
+ if (hs400_tuning)
+ host->flags |= SDHCI_HS400_TUNING;
+
+ clk = host->max_clk / (esdhc->div_ratio + 1);
+ esdhc_of_set_clock(host, clk);
+ pr_info("%s: Hold on to use fixed sampling clock. Try tuning with reduced clock!\n",
+ mmc_hostname(mmc));
+ } else {
+ break;
+ }
+ } else {
+ break;
+ }
+ } while (retries--);
+
+ if (ret) {
+ esdhc_tuning_block_enable(host, false);
+ } else if (hs400_tuning) {
+ val = sdhci_readl(host, ESDHC_SDTIMNGCTL);
+ val |= ESDHC_FLW_CTL_BG;
+ sdhci_writel(host, val, ESDHC_SDTIMNGCTL);
+ }
+
+ return ret;
+}
+
+static void esdhc_set_uhs_signaling(struct sdhci_host *host,
+ unsigned int timing)
+{
+ u32 val;
+
+ /*
+ * There are specific registers setting for HS400 mode.
+ * Clean all of them if controller is in HS400 mode to
+ * exit HS400 mode before re-setting any speed mode.
+ */
+ val = sdhci_readl(host, ESDHC_TBCTL);
+ if (val & ESDHC_HS400_MODE) {
+ val = sdhci_readl(host, ESDHC_SDTIMNGCTL);
+ val &= ~ESDHC_FLW_CTL_BG;
+ sdhci_writel(host, val, ESDHC_SDTIMNGCTL);
+
+ val = sdhci_readl(host, ESDHC_SDCLKCTL);
+ val &= ~ESDHC_CMD_CLK_CTL;
+ sdhci_writel(host, val, ESDHC_SDCLKCTL);
+
+ esdhc_clock_enable(host, false);
+ val = sdhci_readl(host, ESDHC_TBCTL);
+ val &= ~ESDHC_HS400_MODE;
+ sdhci_writel(host, val, ESDHC_TBCTL);
+ esdhc_clock_enable(host, true);
+
+ val = sdhci_readl(host, ESDHC_DLLCFG0);
+ val &= ~(ESDHC_DLL_ENABLE | ESDHC_DLL_FREQ_SEL);
+ sdhci_writel(host, val, ESDHC_DLLCFG0);
+
+ val = sdhci_readl(host, ESDHC_TBCTL);
+ val &= ~ESDHC_HS400_WNDW_ADJUST;
+ sdhci_writel(host, val, ESDHC_TBCTL);
+
+ esdhc_tuning_block_enable(host, false);
+ }
+
+ if (timing == MMC_TIMING_MMC_HS400)
+ esdhc_tuning_block_enable(host, true);
+ else
+ sdhci_set_uhs_signaling(host, timing);
+}
+
+static u32 esdhc_irq(struct sdhci_host *host, u32 intmask)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
+ u32 command;
+
+ if (esdhc->quirk_trans_complete_erratum) {
+ command = SDHCI_GET_CMD(sdhci_readw(host,
+ SDHCI_COMMAND));
+ if (command == MMC_WRITE_MULTIPLE_BLOCK &&
+ sdhci_readw(host, SDHCI_BLOCK_COUNT) &&
+ intmask & SDHCI_INT_DATA_END) {
+ intmask &= ~SDHCI_INT_DATA_END;
+ sdhci_writel(host, SDHCI_INT_DATA_END,
+ SDHCI_INT_STATUS);
+ }
+ }
+ return intmask;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static u32 esdhc_proctl;
+static int esdhc_of_suspend(struct device *dev)
+{
+ struct sdhci_host *host = dev_get_drvdata(dev);
+
+ esdhc_proctl = sdhci_readl(host, SDHCI_HOST_CONTROL);
+
+ if (host->tuning_mode != SDHCI_TUNING_MODE_3)
+ mmc_retune_needed(host->mmc);
+
+ return sdhci_suspend_host(host);
+}
+
+static int esdhc_of_resume(struct device *dev)
+{
+ struct sdhci_host *host = dev_get_drvdata(dev);
+ int ret = sdhci_resume_host(host);
+
+ if (ret == 0) {
+ /* Isn't this already done by sdhci_resume_host() ? --rmk */
+ esdhc_of_enable_dma(host);
+ sdhci_writel(host, esdhc_proctl, SDHCI_HOST_CONTROL);
+ }
+ return ret;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(esdhc_of_dev_pm_ops,
+ esdhc_of_suspend,
+ esdhc_of_resume);
+
+static const struct sdhci_ops sdhci_esdhc_be_ops = {
+ .read_l = esdhc_be_readl,
+ .read_w = esdhc_be_readw,
+ .read_b = esdhc_be_readb,
+ .write_l = esdhc_be_writel,
+ .write_w = esdhc_be_writew,
+ .write_b = esdhc_be_writeb,
+ .set_clock = esdhc_of_set_clock,
+ .enable_dma = esdhc_of_enable_dma,
+ .get_max_clock = esdhc_of_get_max_clock,
+ .get_min_clock = esdhc_of_get_min_clock,
+ .adma_workaround = esdhc_of_adma_workaround,
+ .set_bus_width = esdhc_pltfm_set_bus_width,
+ .reset = esdhc_reset,
+ .set_uhs_signaling = esdhc_set_uhs_signaling,
+ .irq = esdhc_irq,
+};
+
+static const struct sdhci_ops sdhci_esdhc_le_ops = {
+ .read_l = esdhc_le_readl,
+ .read_w = esdhc_le_readw,
+ .read_b = esdhc_le_readb,
+ .write_l = esdhc_le_writel,
+ .write_w = esdhc_le_writew,
+ .write_b = esdhc_le_writeb,
+ .set_clock = esdhc_of_set_clock,
+ .enable_dma = esdhc_of_enable_dma,
+ .get_max_clock = esdhc_of_get_max_clock,
+ .get_min_clock = esdhc_of_get_min_clock,
+ .adma_workaround = esdhc_of_adma_workaround,
+ .set_bus_width = esdhc_pltfm_set_bus_width,
+ .reset = esdhc_reset,
+ .set_uhs_signaling = esdhc_set_uhs_signaling,
+ .irq = esdhc_irq,
+};
+
+static const struct sdhci_pltfm_data sdhci_esdhc_be_pdata = {
+ .quirks = ESDHC_DEFAULT_QUIRKS |
+#ifdef CONFIG_PPC
+ SDHCI_QUIRK_BROKEN_CARD_DETECTION |
+#endif
+ SDHCI_QUIRK_NO_CARD_NO_RESET |
+ SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
+ .ops = &sdhci_esdhc_be_ops,
+};
+
+static const struct sdhci_pltfm_data sdhci_esdhc_le_pdata = {
+ .quirks = ESDHC_DEFAULT_QUIRKS |
+ SDHCI_QUIRK_NO_CARD_NO_RESET |
+ SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
+ .ops = &sdhci_esdhc_le_ops,
+};
+
+static struct soc_device_attribute soc_incorrect_hostver[] = {
+ { .family = "QorIQ T4240", .revision = "1.0", },
+ { .family = "QorIQ T4240", .revision = "2.0", },
+ { /* sentinel */ }
+};
+
+static struct soc_device_attribute soc_fixup_sdhc_clkdivs[] = {
+ { .family = "QorIQ LX2160A", .revision = "1.0", },
+ { .family = "QorIQ LX2160A", .revision = "2.0", },
+ { .family = "QorIQ LS1028A", .revision = "1.0", },
+ { /* sentinel */ }
+};
+
+static struct soc_device_attribute soc_unreliable_pulse_detection[] = {
+ { .family = "QorIQ LX2160A", .revision = "1.0", },
+ { .family = "QorIQ LX2160A", .revision = "2.0", },
+ { .family = "QorIQ LS1028A", .revision = "1.0", },
+ { /* sentinel */ }
+};
+
+static void esdhc_init(struct platform_device *pdev, struct sdhci_host *host)
+{
+ const struct of_device_id *match;
+ struct sdhci_pltfm_host *pltfm_host;
+ struct sdhci_esdhc *esdhc;
+ struct device_node *np;
+ struct clk *clk;
+ u32 val;
+ u16 host_ver;
+
+ pltfm_host = sdhci_priv(host);
+ esdhc = sdhci_pltfm_priv(pltfm_host);
+
+ host_ver = sdhci_readw(host, SDHCI_HOST_VERSION);
+ esdhc->vendor_ver = (host_ver & SDHCI_VENDOR_VER_MASK) >>
+ SDHCI_VENDOR_VER_SHIFT;
+ esdhc->spec_ver = host_ver & SDHCI_SPEC_VER_MASK;
+ if (soc_device_match(soc_incorrect_hostver))
+ esdhc->quirk_incorrect_hostver = true;
+ else
+ esdhc->quirk_incorrect_hostver = false;
+
+ if (soc_device_match(soc_fixup_sdhc_clkdivs))
+ esdhc->quirk_limited_clk_division = true;
+ else
+ esdhc->quirk_limited_clk_division = false;
+
+ if (soc_device_match(soc_unreliable_pulse_detection))
+ esdhc->quirk_unreliable_pulse_detection = true;
+ else
+ esdhc->quirk_unreliable_pulse_detection = false;
+
+ match = of_match_node(sdhci_esdhc_of_match, pdev->dev.of_node);
+ if (match)
+ esdhc->clk_fixup = match->data;
+ np = pdev->dev.of_node;
+
+ if (of_device_is_compatible(np, "fsl,p2020-esdhc")) {
+ esdhc->quirk_delay_before_data_reset = true;
+ esdhc->quirk_trans_complete_erratum = true;
+ }
+
+ clk = of_clk_get(np, 0);
+ if (!IS_ERR(clk)) {
+ /*
+ * esdhc->peripheral_clock would be assigned with a value
+ * which is eSDHC base clock when use periperal clock.
+ * For some platforms, the clock value got by common clk
+ * API is peripheral clock while the eSDHC base clock is
+ * 1/2 peripheral clock.
+ */
+ if (of_device_is_compatible(np, "fsl,ls1046a-esdhc") ||
+ of_device_is_compatible(np, "fsl,ls1028a-esdhc") ||
+ of_device_is_compatible(np, "fsl,ls1088a-esdhc"))
+ esdhc->peripheral_clock = clk_get_rate(clk) / 2;
+ else
+ esdhc->peripheral_clock = clk_get_rate(clk);
+
+ clk_put(clk);
+ }
+
+ esdhc_clock_enable(host, false);
+ val = sdhci_readl(host, ESDHC_DMA_SYSCTL);
+ /*
+ * This bit is not able to be reset by SDHCI_RESET_ALL. Need to
+ * initialize it as 1 or 0 once, to override the different value
+ * which may be configured in bootloader.
+ */
+ if (esdhc->peripheral_clock)
+ val |= ESDHC_PERIPHERAL_CLK_SEL;
+ else
+ val &= ~ESDHC_PERIPHERAL_CLK_SEL;
+ sdhci_writel(host, val, ESDHC_DMA_SYSCTL);
+ esdhc_clock_enable(host, true);
+}
+
+static int esdhc_hs400_prepare_ddr(struct mmc_host *mmc)
+{
+ esdhc_tuning_block_enable(mmc_priv(mmc), false);
+ return 0;
+}
+
+static int sdhci_esdhc_probe(struct platform_device *pdev)
+{
+ struct sdhci_host *host;
+ struct device_node *np, *tp;
+ struct sdhci_pltfm_host *pltfm_host;
+ struct sdhci_esdhc *esdhc;
+ int ret;
+
+ np = pdev->dev.of_node;
+
+ if (of_property_read_bool(np, "little-endian"))
+ host = sdhci_pltfm_init(pdev, &sdhci_esdhc_le_pdata,
+ sizeof(struct sdhci_esdhc));
+ else
+ host = sdhci_pltfm_init(pdev, &sdhci_esdhc_be_pdata,
+ sizeof(struct sdhci_esdhc));
+
+ if (IS_ERR(host))
+ return PTR_ERR(host);
+
+ host->mmc_host_ops.start_signal_voltage_switch =
+ esdhc_signal_voltage_switch;
+ host->mmc_host_ops.execute_tuning = esdhc_execute_tuning;
+ host->mmc_host_ops.hs400_prepare_ddr = esdhc_hs400_prepare_ddr;
+ host->tuning_delay = 1;
+
+ esdhc_init(pdev, host);
+
+ sdhci_get_of_property(pdev);
+
+ pltfm_host = sdhci_priv(host);
+ esdhc = sdhci_pltfm_priv(pltfm_host);
+ if (soc_device_match(soc_tuning_erratum_type1))
+ esdhc->quirk_tuning_erratum_type1 = true;
+ else
+ esdhc->quirk_tuning_erratum_type1 = false;
+
+ if (soc_device_match(soc_tuning_erratum_type2))
+ esdhc->quirk_tuning_erratum_type2 = true;
+ else
+ esdhc->quirk_tuning_erratum_type2 = false;
+
+ if (esdhc->vendor_ver == VENDOR_V_22)
+ host->quirks2 |= SDHCI_QUIRK2_HOST_NO_CMD23;
+
+ if (esdhc->vendor_ver > VENDOR_V_22)
+ host->quirks &= ~SDHCI_QUIRK_NO_BUSY_IRQ;
+
+ tp = of_find_compatible_node(NULL, NULL, "fsl,p2020-esdhc");
+ if (tp) {
+ of_node_put(tp);
+ host->quirks |= SDHCI_QUIRK_RESET_AFTER_REQUEST;
+ host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
+ }
+
+ if (of_device_is_compatible(np, "fsl,p5040-esdhc") ||
+ of_device_is_compatible(np, "fsl,p5020-esdhc") ||
+ of_device_is_compatible(np, "fsl,p4080-esdhc") ||
+ of_device_is_compatible(np, "fsl,p1020-esdhc") ||
+ of_device_is_compatible(np, "fsl,t1040-esdhc"))
+ host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
+
+ if (of_device_is_compatible(np, "fsl,ls1021a-esdhc"))
+ host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
+
+ esdhc->quirk_ignore_data_inhibit = false;
+ if (of_device_is_compatible(np, "fsl,p2020-esdhc")) {
+ /*
+ * Freescale messed up with P2020 as it has a non-standard
+ * host control register
+ */
+ host->quirks2 |= SDHCI_QUIRK2_BROKEN_HOST_CONTROL;
+ esdhc->quirk_ignore_data_inhibit = true;
+ }
+
+ /* call to generic mmc_of_parse to support additional capabilities */
+ ret = mmc_of_parse(host->mmc);
+ if (ret)
+ goto err;
+
+ mmc_of_parse_voltage(host->mmc, &host->ocr_mask);
+
+ ret = sdhci_add_host(host);
+ if (ret)
+ goto err;
+
+ return 0;
+ err:
+ sdhci_pltfm_free(pdev);
+ return ret;
+}
+
+static struct platform_driver sdhci_esdhc_driver = {
+ .driver = {
+ .name = "sdhci-esdhc",
+ .probe_type = PROBE_PREFER_ASYNCHRONOUS,
+ .of_match_table = sdhci_esdhc_of_match,
+ .pm = &esdhc_of_dev_pm_ops,
+ },
+ .probe = sdhci_esdhc_probe,
+ .remove = sdhci_pltfm_unregister,
+};
+
+module_platform_driver(sdhci_esdhc_driver);
+
+MODULE_DESCRIPTION("SDHCI OF driver for Freescale MPC eSDHC");
+MODULE_AUTHOR("Xiaobo Xie <X.Xie@freescale.com>, "
+ "Anton Vorontsov <avorontsov@ru.mvista.com>");
+MODULE_LICENSE("GPL v2");