mmc_card_ddr52(card) ? "DDR " : "",
type);
} else {
- pr_info("%s: new %s%s%s%s%s card at address %04x\n",
+ pr_info("%s: new %s%s%s%s%s%s card at address %04x\n",
mmc_hostname(card->host),
mmc_card_uhs(card) ? "ultra high speed " :
(mmc_card_hs(card) ? "high speed " : ""),
mmc_card_hs400(card) ? "HS400 " :
(mmc_card_hs200(card) ? "HS200 " : ""),
+ mmc_card_hs400es(card) ? "Enhanced strobe " : "",
mmc_card_ddr52(card) ? "DDR " : "",
uhs_bus_speed_mode, type, card->rca);
}
host->caps2 |= MMC_CAP2_HS400_1_8V | MMC_CAP2_HS200_1_8V_SDR;
if (of_property_read_bool(np, "mmc-hs400-1_2v"))
host->caps2 |= MMC_CAP2_HS400_1_2V | MMC_CAP2_HS200_1_2V_SDR;
+ if (of_property_read_bool(np, "mmc-hs400-enhanced-strobe"))
+ host->caps2 |= MMC_CAP2_HS400_ENHANCED_STROBE;
if (of_property_read_bool(np, "supports-sd"))
host->restrict_caps |= RESTRICT_CARD_TYPE_SD;
avail_type |= EXT_CSD_CARD_TYPE_HS400_1_2V;
}
+ if ((caps2 & MMC_CAP2_HS400_ENHANCED_STROBE) &&
+ card->ext_csd.strobe_support &&
+ ((card_type & EXT_CSD_CARD_TYPE_HS400_1_2V) ||
+ (card_type & EXT_CSD_CARD_TYPE_HS400_1_8V)))
+ avail_type |= EXT_CSD_CARD_TYPE_HS400ES;
+
card->ext_csd.hs_max_dtr = hs_max_dtr;
card->ext_csd.hs200_max_dtr = hs200_max_dtr;
card->mmc_avail_type = avail_type;
mmc_card_set_blockaddr(card);
}
+ /*
+ * Enhance Strobe is supported since v5.1 which rev should be
+ * 8 but some eMMC devices can support it with rev 7. So handle
+ * Enhance Strobe here.
+ */
+ card->ext_csd.strobe_support = ext_csd[EXT_CSD_STROBE_SUPPORT];
+
card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
mmc_select_card_type(card);
u8 val;
/*
- * HS400 mode requires 8-bit bus width
+ * HS400(ES) mode requires 8-bit bus width
*/
- if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
- host->ios.bus_width == MMC_BUS_WIDTH_8))
+ if (!(((card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400) ||
+ (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES)) &&
+ host->ios.bus_width == MMC_BUS_WIDTH_8))
return 0;
if (host->caps & MMC_CAP_WAIT_WHILE_BUSY)
}
/* Switch card to DDR */
+ val = EXT_CSD_DDR_BUS_WIDTH_8;
+ if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES) {
+ val |= EXT_CSD_BUS_WIDTH_STROBE;
+ /*
+ * Make sure we are in non-enhanced strobe mode before we
+ * actually enable it in ext_csd.
+ */
+ if (host->ops->prepare_enhanced_strobe)
+ err = host->ops->prepare_enhanced_strobe(host, false);
+
+ if (err) {
+ pr_err("%s: unprepare_enhanced strobe failed, err:%d\n",
+ mmc_hostname(host), err);
+ return err;
+ }
+ }
+
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_BUS_WIDTH,
- EXT_CSD_DDR_BUS_WIDTH_8,
+ val,
card->ext_csd.generic_cmd6_time);
if (err) {
pr_err("%s: switch to bus width for hs400 failed, err:%d\n",
mmc_set_timing(host, MMC_TIMING_MMC_HS400);
mmc_set_bus_speed(card);
+ if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES) {
+ /* Controller enable enhanced strobe function */
+ if (host->ops->prepare_enhanced_strobe)
+ err = host->ops->prepare_enhanced_strobe(host, true);
+
+ if (err) {
+ pr_err("%s: prepare enhanced strobe failed, err:%d\n",
+ mmc_hostname(host), err);
+ return err;
+ }
+
+ /*
+ * After switching to hs400 enhanced strobe mode, we expect to
+ * verify whether it works or not. If controller can't handle
+ * bus width test, compare ext_csd previously read in 1 bit mode
+ * against ext_csd at new bus width
+ */
+ if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
+ err = mmc_compare_ext_csds(card, MMC_BUS_WIDTH_8);
+ else
+ err = mmc_bus_test(card, MMC_BUS_WIDTH_8);
+
+ if (err) {
+ pr_warn("%s: switch to enhanced strobe failed\n",
+ mmc_hostname(host));
+ return err;
+ }
+ }
+
if (!send_status) {
err = mmc_switch_status(card);
if (err)
}
/*
- * Activate High Speed or HS200 mode if supported.
+ * Activate High Speed or HS200 mode if supported. For HS400
+ * with enhanced strobe mode, we should activate High Speed.
*/
static int mmc_select_timing(struct mmc_card *card)
{
if (!mmc_can_ext_csd(card))
goto bus_speed;
- if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200)
+ if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES)
+ err = mmc_select_hs(card);
+ else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200)
err = mmc_select_hs200(card);
else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS)
err = mmc_select_hs(card);
} else if (mmc_card_hs(card)) {
/* Select the desired bus width optionally */
err = mmc_select_bus_width(card);
- if (!IS_ERR_VALUE(err)) {
+ if (IS_ERR_VALUE(err))
+ goto free_card;
+
+ if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES) {
+ /* Directly from HS to HS400-ES */
+ err = mmc_select_hs400(card);
+ if (err)
+ goto free_card;
+ } else {
err = mmc_select_hs_ddr(card);
if (err)
goto free_card;
#include "sdhci-pltfm.h"
#define SDHCI_ARASAN_CLK_CTRL_OFFSET 0x2c
+#define SDHCI_ARASAN_VENDOR_REGISTER 0x78
+#define VENDOR_ENHANCED_STROBE BIT(0)
#define CLK_CTRL_TIMEOUT_SHIFT 16
#define CLK_CTRL_TIMEOUT_MASK (0xf << CLK_CTRL_TIMEOUT_SHIFT)
#define CLK_CTRL_TIMEOUT_MIN_EXP 13
return freq;
}
+static int sdhci_arasan_enhanced_strobe(struct mmc_host *mmc,
+ bool enable)
+{
+ u32 vendor;
+ struct sdhci_host *host = mmc_priv(mmc);
+
+ vendor = readl(host->ioaddr + SDHCI_ARASAN_VENDOR_REGISTER);
+ if (enable)
+ vendor |= VENDOR_ENHANCED_STROBE;
+ else
+ vendor &= (~VENDOR_ENHANCED_STROBE);
+
+ writel(vendor, host->ioaddr + SDHCI_ARASAN_VENDOR_REGISTER);
+
+ return 0;
+}
+
static void sdhci_arasan_set_clock(struct sdhci_host *host, unsigned int clock)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
dev_err(&pdev->dev, "phy_power_on err.\n");
goto err_phy_power;
}
+
+ host->mmc_host_ops.prepare_enhanced_strobe =
+ sdhci_arasan_enhanced_strobe;
}
ret = sdhci_add_host(host);
return err;
}
+static int sdhci_prepare_enhanced_strobe(struct mmc_host *mmc, bool enable)
+{
+ /*
+ * Currently we can't find a register to enable enhanced strobe
+ * function for standard sdhci, so we expect variant drivers to
+ * overwrite it.
+ */
+ return -EINVAL;
+}
+
static int sdhci_select_drive_strength(struct mmc_card *card,
unsigned int max_dtr, int host_drv,
int card_drv, int *drv_type)
.enable_sdio_irq = sdhci_enable_sdio_irq,
.start_signal_voltage_switch = sdhci_start_signal_voltage_switch,
.prepare_hs400_tuning = sdhci_prepare_hs400_tuning,
+ .prepare_enhanced_strobe = sdhci_prepare_enhanced_strobe,
.execute_tuning = sdhci_execute_tuning,
.select_drive_strength = sdhci_select_drive_strength,
.card_event = sdhci_card_event,
u8 raw_partition_support; /* 160 */
u8 raw_rpmb_size_mult; /* 168 */
u8 raw_erased_mem_count; /* 181 */
+ u8 strobe_support; /* 184 */
u8 raw_ext_csd_structure; /* 194 */
u8 raw_card_type; /* 196 */
u8 raw_driver_strength; /* 197 */
#include <linux/mmc/core.h>
#include <linux/mmc/card.h>
+#include <linux/mmc/mmc.h>
#include <linux/mmc/pm.h>
struct mmc_ios {
/* Prepare HS400 target operating frequency depending host driver */
int (*prepare_hs400_tuning)(struct mmc_host *host, struct mmc_ios *ios);
+ /* Prepare enhanced strobe depending host driver */
+ int (*prepare_enhanced_strobe)(struct mmc_host *host, bool enable);
int (*select_drive_strength)(struct mmc_card *card,
unsigned int max_dtr, int host_drv,
int card_drv, int *drv_type);
#define MMC_CAP2_HSX00_1_2V (MMC_CAP2_HS200_1_2V_SDR | MMC_CAP2_HS400_1_2V)
#define MMC_CAP2_SDIO_IRQ_NOTHREAD (1 << 17)
#define MMC_CAP2_NO_WRITE_PROTECT (1 << 18) /* No physical write protect pin, assume that card is always read-write */
+#define MMC_CAP2_HS400_ENHANCED_STROBE (1 << 20) /* Host supports enhanced strobe */
mmc_pm_flag_t pm_caps; /* supported pm features */
MMC_CAP_UHS_DDR50);
}
+static inline int mmc_host_hs400_enhanced_strobe(struct mmc_host *host)
+{
+ return host->caps2 & MMC_CAP2_HS400_ENHANCED_STROBE;
+}
+
static inline int mmc_host_packed_wr(struct mmc_host *host)
{
return host->caps2 & MMC_CAP2_PACKED_WR;
return card->host->ios.timing == MMC_TIMING_MMC_HS400;
}
+static inline bool mmc_card_hs400es(struct mmc_card *card)
+{
+ if (mmc_card_hs400(card) &&
+ (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES))
+ return 1;
+
+ return 0;
+}
+
void mmc_retune_timer_stop(struct mmc_host *host);
static inline void mmc_retune_needed(struct mmc_host *host)
#define EXT_CSD_PART_CONFIG 179 /* R/W */
#define EXT_CSD_ERASED_MEM_CONT 181 /* RO */
#define EXT_CSD_BUS_WIDTH 183 /* R/W */
+#define EXT_CSD_STROBE_SUPPORT 184 /* RO */
#define EXT_CSD_HS_TIMING 185 /* R/W */
#define EXT_CSD_POWER_CLASS 187 /* R/W */
#define EXT_CSD_REV 192 /* RO */
#define EXT_CSD_CARD_TYPE_HS400_1_2V (1<<7) /* Card can run at 200MHz DDR, 1.2V */
#define EXT_CSD_CARD_TYPE_HS400 (EXT_CSD_CARD_TYPE_HS400_1_8V | \
EXT_CSD_CARD_TYPE_HS400_1_2V)
+#define EXT_CSD_CARD_TYPE_HS400ES (1<<8) /* Card can run at HS400ES */
#define EXT_CSD_BUS_WIDTH_1 0 /* Card is in 1 bit mode */
#define EXT_CSD_BUS_WIDTH_4 1 /* Card is in 4 bit mode */
#define EXT_CSD_BUS_WIDTH_8 2 /* Card is in 8 bit mode */
#define EXT_CSD_DDR_BUS_WIDTH_4 5 /* Card is in 4 bit DDR mode */
#define EXT_CSD_DDR_BUS_WIDTH_8 6 /* Card is in 8 bit DDR mode */
+#define EXT_CSD_BUS_WIDTH_STROBE BIT(7) /* Enhanced strobe mode */
#define EXT_CSD_TIMING_BC 0 /* Backwards compatility */
#define EXT_CSD_TIMING_HS 1 /* High speed */
projects / firefly-linux-kernel-4.4.55.git / commitdiff