// SPDX-License-Identifier: GPL-2.0
/*
* Driver for Synopsys DesignWare Cores Mobile Storage Host Controller
*
* Copyright ( C ) 2018 Synaptics Incorporated
*
* Author : Jisheng Zhang < jszhang @ kernel . org >
*/
#include <linux/acpi.h>
#include <linux/arm-smccc.h>
#include <linux/bitfield.h>
#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/iopoll.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_domain.h>
#include <linux/pm_runtime.h>
#include <linux/reset.h>
#include <linux/sizes.h>
#include "sdhci-pltfm.h"
#include "cqhci.h"
#define SDHCI_DWCMSHC_ARG2_STUFF GENMASK(31 , 16 )
/* DWCMSHC specific Mode Select value */
#define DWCMSHC_CTRL_HS400 0 x7
/* DWC IP vendor area 1 pointer */
#define DWCMSHC_P_VENDOR_AREA1 0 xe8
#define DWCMSHC_AREA1_MASK GENMASK(11 , 0 )
/* Offset inside the vendor area 1 */
#define DWCMSHC_HOST_CTRL3 0 x8
#define DWCMSHC_EMMC_CONTROL 0 x2c
#define DWCMSHC_CARD_IS_EMMC BIT(0 )
#define DWCMSHC_ENHANCED_STROBE BIT(8 )
#define DWCMSHC_EMMC_ATCTRL 0 x40
/* Tuning and auto-tuning fields in AT_CTRL_R control register */
#define AT_CTRL_AT_EN BIT(0 ) /* autotuning is enabled */
#define AT_CTRL_CI_SEL BIT(1 ) /* interval to drive center phase select */
#define AT_CTRL_SWIN_TH_EN BIT(2 ) /* sampling window threshold enable */
#define AT_CTRL_RPT_TUNE_ERR BIT(3 ) /* enable reporting framing errors */
#define AT_CTRL_SW_TUNE_EN BIT(4 ) /* enable software managed tuning */
#define AT_CTRL_WIN_EDGE_SEL_MASK GENMASK(11 , 8 ) /* bits [11:8] */
#define AT_CTRL_WIN_EDGE_SEL 0 xf /* sampling window edge select */
#define AT_CTRL_TUNE_CLK_STOP_EN BIT(16 ) /* clocks stopped during phase code change */
#define AT_CTRL_PRE_CHANGE_DLY_MASK GENMASK(18 , 17 ) /* bits [18:17] */
#define AT_CTRL_PRE_CHANGE_DLY 0 x1 /* 2-cycle latency */
#define AT_CTRL_POST_CHANGE_DLY_MASK GENMASK(20 , 19 ) /* bits [20:19] */
#define AT_CTRL_POST_CHANGE_DLY 0 x3 /* 4-cycle latency */
#define AT_CTRL_SWIN_TH_VAL_MASK GENMASK(31 , 24 ) /* bits [31:24] */
#define AT_CTRL_SWIN_TH_VAL 0 x9 /* sampling window threshold */
/* DWC IP vendor area 2 pointer */
#define DWCMSHC_P_VENDOR_AREA2 0 xea
/* Sophgo CV18XX specific Registers */
#define CV18XX_SDHCI_MSHC_CTRL 0 x00
#define CV18XX_EMMC_FUNC_EN BIT(0 )
#define CV18XX_LATANCY_1T BIT(1 )
#define CV18XX_SDHCI_PHY_TX_RX_DLY 0 x40
#define CV18XX_PHY_TX_DLY_MSK GENMASK(6 , 0 )
#define CV18XX_PHY_TX_SRC_MSK GENMASK(9 , 8 )
#define CV18XX_PHY_TX_SRC_INVERT_CLK_TX 0 x1
#define CV18XX_PHY_RX_DLY_MSK GENMASK(22 , 16 )
#define CV18XX_PHY_RX_SRC_MSK GENMASK(25 , 24 )
#define CV18XX_PHY_RX_SRC_INVERT_RX_CLK 0 x1
#define CV18XX_SDHCI_PHY_CONFIG 0 x4c
#define CV18XX_PHY_TX_BPS BIT(0 )
#define CV18XX_TUNE_MAX 128
#define CV18XX_TUNE_STEP 1
#define CV18XX_RETRY_TUNING_MAX 50
/* Rockchip specific Registers */
#define DWCMSHC_EMMC_DLL_CTRL 0 x800
#define DWCMSHC_EMMC_DLL_RXCLK 0 x804
#define DWCMSHC_EMMC_DLL_TXCLK 0 x808
#define DWCMSHC_EMMC_DLL_STRBIN 0 x80c
#define DECMSHC_EMMC_DLL_CMDOUT 0 x810
#define DWCMSHC_EMMC_DLL_STATUS0 0 x840
#define DWCMSHC_EMMC_DLL_START BIT(0 )
#define DWCMSHC_EMMC_DLL_LOCKED BIT(8 )
#define DWCMSHC_EMMC_DLL_TIMEOUT BIT(9 )
#define DWCMSHC_EMMC_DLL_RXCLK_SRCSEL 29
#define DWCMSHC_EMMC_DLL_START_POINT 16
#define DWCMSHC_EMMC_DLL_INC 8
#define DWCMSHC_EMMC_DLL_BYPASS BIT(24 )
#define DWCMSHC_EMMC_DLL_DLYENA BIT(27 )
#define DLL_TXCLK_TAPNUM_DEFAULT 0 x10
#define DLL_TXCLK_TAPNUM_90_DEGREES 0 xA
#define DLL_TXCLK_TAPNUM_FROM_SW BIT(24 )
#define DLL_STRBIN_TAPNUM_DEFAULT 0 x4
#define DLL_STRBIN_TAPNUM_FROM_SW BIT(24 )
#define DLL_STRBIN_DELAY_NUM_SEL BIT(26 )
#define DLL_STRBIN_DELAY_NUM_OFFSET 16
#define DLL_STRBIN_DELAY_NUM_DEFAULT 0 x16
#define DLL_RXCLK_NO_INVERTER 1
#define DLL_RXCLK_INVERTER 0
#define DLL_CMDOUT_TAPNUM_90_DEGREES 0 x8
#define DLL_RXCLK_ORI_GATE BIT(31 )
#define DLL_CMDOUT_TAPNUM_FROM_SW BIT(24 )
#define DLL_CMDOUT_SRC_CLK_NEG BIT(28 )
#define DLL_CMDOUT_EN_SRC_CLK_NEG BIT(29 )
#define DLL_LOCK_WO_TMOUT(x) \
((((x) & DWCMSHC_EMMC_DLL_LOCKED) == DWCMSHC_EMMC_DLL_LOCKED) && \
(((x) & DWCMSHC_EMMC_DLL_TIMEOUT) == 0 ))
/* PHY register area pointer */
#define DWC_MSHC_PTR_PHY_R 0 x300
/* PHY general configuration */
#define PHY_CNFG_R (DWC_MSHC_PTR_PHY_R + 0 x00)
#define PHY_CNFG_RSTN_DEASSERT 0 x1 /* Deassert PHY reset */
#define PHY_CNFG_PHY_PWRGOOD_MASK BIT_MASK(1 ) /* bit [1] */
#define PHY_CNFG_PAD_SP_MASK GENMASK(19 , 16 ) /* bits [19:16] */
#define PHY_CNFG_PAD_SP 0 x0c /* PMOS TX drive strength */
#define PHY_CNFG_PAD_SP_SG2042 0 x09 /* PMOS TX drive strength for SG2042 */
#define PHY_CNFG_PAD_SN_MASK GENMASK(23 , 20 ) /* bits [23:20] */
#define PHY_CNFG_PAD_SN 0 x0c /* NMOS TX drive strength */
#define PHY_CNFG_PAD_SN_SG2042 0 x08 /* NMOS TX drive strength for SG2042 */
/* PHY command/response pad settings */
#define PHY_CMDPAD_CNFG_R (DWC_MSHC_PTR_PHY_R + 0 x04)
/* PHY data pad settings */
#define PHY_DATAPAD_CNFG_R (DWC_MSHC_PTR_PHY_R + 0 x06)
/* PHY clock pad settings */
#define PHY_CLKPAD_CNFG_R (DWC_MSHC_PTR_PHY_R + 0 x08)
/* PHY strobe pad settings */
#define PHY_STBPAD_CNFG_R (DWC_MSHC_PTR_PHY_R + 0 x0a)
/* PHY reset pad settings */
#define PHY_RSTNPAD_CNFG_R (DWC_MSHC_PTR_PHY_R + 0 x0c)
/* Bitfields are common for all pad settings */
#define PHY_PAD_RXSEL_1V8 0 x1 /* Receiver type select for 1.8V */
#define PHY_PAD_RXSEL_3V3 0 x2 /* Receiver type select for 3.3V */
#define PHY_PAD_WEAKPULL_MASK GENMASK(4 , 3 ) /* bits [4:3] */
#define PHY_PAD_WEAKPULL_PULLUP 0 x1 /* Weak pull up enabled */
#define PHY_PAD_WEAKPULL_PULLDOWN 0 x2 /* Weak pull down enabled */
#define PHY_PAD_TXSLEW_CTRL_P_MASK GENMASK(8 , 5 ) /* bits [8:5] */
#define PHY_PAD_TXSLEW_CTRL_P 0 x3 /* Slew control for P-Type pad TX */
#define PHY_PAD_TXSLEW_CTRL_N_MASK GENMASK(12 , 9 ) /* bits [12:9] */
#define PHY_PAD_TXSLEW_CTRL_N 0 x3 /* Slew control for N-Type pad TX */
#define PHY_PAD_TXSLEW_CTRL_N_SG2042 0 x2 /* Slew control for N-Type pad TX for SG2042 */
/* PHY CLK delay line settings */
#define PHY_SDCLKDL_CNFG_R (DWC_MSHC_PTR_PHY_R + 0 x1d)
#define PHY_SDCLKDL_CNFG_EXTDLY_EN BIT(0 )
#define PHY_SDCLKDL_CNFG_UPDATE BIT(4 ) /* set before writing to SDCLKDL_DC */
/* PHY CLK delay line delay code */
#define PHY_SDCLKDL_DC_R (DWC_MSHC_PTR_PHY_R + 0 x1e)
#define PHY_SDCLKDL_DC_INITIAL 0 x40 /* initial delay code */
#define PHY_SDCLKDL_DC_DEFAULT 0 x32 /* default delay code */
#define PHY_SDCLKDL_DC_HS400 0 x18 /* delay code for HS400 mode */
#define PHY_SMPLDL_CNFG_R (DWC_MSHC_PTR_PHY_R + 0 x20)
#define PHY_SMPLDL_CNFG_BYPASS_EN BIT(1 )
/* PHY drift_cclk_rx delay line configuration setting */
#define PHY_ATDL_CNFG_R (DWC_MSHC_PTR_PHY_R + 0 x21)
#define PHY_ATDL_CNFG_INPSEL_MASK GENMASK(3 , 2 ) /* bits [3:2] */
#define PHY_ATDL_CNFG_INPSEL 0 x3 /* delay line input source */
#define PHY_ATDL_CNFG_INPSEL_SG2042 0 x2 /* delay line input source for SG2042 */
/* PHY DLL control settings */
#define PHY_DLL_CTRL_R (DWC_MSHC_PTR_PHY_R + 0 x24)
#define PHY_DLL_CTRL_DISABLE 0 x0 /* PHY DLL is enabled */
#define PHY_DLL_CTRL_ENABLE 0 x1 /* PHY DLL is disabled */
/* PHY DLL configuration register 1 */
#define PHY_DLL_CNFG1_R (DWC_MSHC_PTR_PHY_R + 0 x25)
#define PHY_DLL_CNFG1_SLVDLY_MASK GENMASK(5 , 4 ) /* bits [5:4] */
#define PHY_DLL_CNFG1_SLVDLY 0 x2 /* DLL slave update delay input */
#define PHY_DLL_CNFG1_WAITCYCLE 0 x5 /* DLL wait cycle input */
/* PHY DLL configuration register 2 */
#define PHY_DLL_CNFG2_R (DWC_MSHC_PTR_PHY_R + 0 x26)
#define PHY_DLL_CNFG2_JUMPSTEP 0 xa /* DLL jump step input */
/* PHY DLL master and slave delay line configuration settings */
#define PHY_DLLDL_CNFG_R (DWC_MSHC_PTR_PHY_R + 0 x28)
#define PHY_DLLDL_CNFG_SLV_INPSEL_MASK GENMASK(6 , 5 ) /* bits [6:5] */
#define PHY_DLLDL_CNFG_SLV_INPSEL 0 x3 /* clock source select for slave DL */
#define FLAG_IO_FIXED_1V8 BIT(0 )
#define BOUNDARY_OK(addr, len) \
((addr | (SZ_128M - 1 )) == ((addr + len - 1 ) | (SZ_128M - 1 )))
#define DWCMSHC_SDHCI_CQE_TRNS_MODE (SDHCI_TRNS_MULTI | \
SDHCI_TRNS_BLK_CNT_EN | \
SDHCI_TRNS_DMA)
/* SMC call for BlueField-3 eMMC RST_N */
#define BLUEFIELD_SMC_SET_EMMC_RST_N 0 x82000007
enum dwcmshc_rk_type {
DWCMSHC_RK3568,
DWCMSHC_RK3588,
};
struct rk35xx_priv {
struct reset_control *reset;
enum dwcmshc_rk_type devtype;
u8 txclk_tapnum;
};
#define DWCMSHC_MAX_OTHER_CLKS 3
struct dwcmshc_priv {
struct clk *bus_clk;
int vendor_specific_area1; /* P_VENDOR_SPECIFIC_AREA1 reg */
int vendor_specific_area2; /* P_VENDOR_SPECIFIC_AREA2 reg */
int num_other_clks;
struct clk_bulk_data other_clks[DWCMSHC_MAX_OTHER_CLKS];
void *priv; /* pointer to SoC private stuff */
u16 delay_line;
u16 flags;
};
struct dwcmshc_pltfm_data {
const struct sdhci_pltfm_data pdata;
int (*init)(struct device *dev, struct sdhci_host *host, struct dwcmshc_priv *dwc_priv);
void (*postinit)(struct sdhci_host *host, struct dwcmshc_priv *dwc_priv);
};
static int dwcmshc_get_enable_other_clks(struct device *dev,
struct dwcmshc_priv *priv,
int num_clks,
const char * const clk_ids[])
{
int err;
if (num_clks > DWCMSHC_MAX_OTHER_CLKS)
return -EINVAL;
for (int i = 0 ; i < num_clks; i++)
priv->other_clks[i].id = clk_ids[i];
err = devm_clk_bulk_get_optional(dev, num_clks, priv->other_clks);
if (err) {
dev_err(dev, "failed to get clocks %d\n" , err);
return err;
}
err = clk_bulk_prepare_enable(num_clks, priv->other_clks);
if (err)
dev_err(dev, "failed to enable clocks %d\n" , err);
priv->num_other_clks = num_clks;
return err;
}
/*
* If DMA addr spans 128 MB boundary , we split the DMA transfer into two
* so that each DMA transfer doesn ' t exceed the boundary .
*/
static void dwcmshc_adma_write_desc(struct sdhci_host *host, void **desc,
dma_addr_t addr, int len, unsigned int cmd)
{
int tmplen, offset;
if (likely(!len || BOUNDARY_OK(addr, len))) {
sdhci_adma_write_desc(host, desc, addr, len, cmd);
return ;
}
offset = addr & (SZ_128M - 1 );
tmplen = SZ_128M - offset;
sdhci_adma_write_desc(host, desc, addr, tmplen, cmd);
addr += tmplen;
len -= tmplen;
sdhci_adma_write_desc(host, desc, addr, len, cmd);
}
static unsigned int dwcmshc_get_max_clock(struct sdhci_host *host)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
if (pltfm_host->clk)
return sdhci_pltfm_clk_get_max_clock(host);
else
return pltfm_host->clock;
}
static unsigned int rk35xx_get_max_clock(struct sdhci_host *host)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
return clk_round_rate(pltfm_host->clk, ULONG_MAX);
}
static void dwcmshc_check_auto_cmd23(struct mmc_host *mmc,
struct mmc_request *mrq)
{
struct sdhci_host *host = mmc_priv(mmc);
/*
* No matter V4 is enabled or not , ARGUMENT2 register is 32 - bit
* block count register which doesn ' t support stuff bits of
* CMD23 argument on dwcmsch host controller .
*/
if (mrq->sbc && (mrq->sbc->arg & SDHCI_DWCMSHC_ARG2_STUFF))
host->flags &= ~SDHCI_AUTO_CMD23;
else
host->flags |= SDHCI_AUTO_CMD23;
}
static void dwcmshc_request(struct mmc_host *mmc, struct mmc_request *mrq)
{
dwcmshc_check_auto_cmd23(mmc, mrq);
sdhci_request(mmc, mrq);
}
static void dwcmshc_phy_init(struct sdhci_host *host)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
u32 rxsel = PHY_PAD_RXSEL_3V3;
u32 val;
if (priv->flags & FLAG_IO_FIXED_1V8 ||
host->mmc->ios.timing & MMC_SIGNAL_VOLTAGE_180)
rxsel = PHY_PAD_RXSEL_1V8;
/* deassert phy reset & set tx drive strength */
val = PHY_CNFG_RSTN_DEASSERT;
val |= FIELD_PREP(PHY_CNFG_PAD_SP_MASK, PHY_CNFG_PAD_SP);
val |= FIELD_PREP(PHY_CNFG_PAD_SN_MASK, PHY_CNFG_PAD_SN);
sdhci_writel(host, val, PHY_CNFG_R);
/* disable delay line */
sdhci_writeb(host, PHY_SDCLKDL_CNFG_UPDATE, PHY_SDCLKDL_CNFG_R);
/* set delay line */
sdhci_writeb(host, priv->delay_line, PHY_SDCLKDL_DC_R);
sdhci_writeb(host, PHY_DLL_CNFG2_JUMPSTEP, PHY_DLL_CNFG2_R);
/* enable delay lane */
val = sdhci_readb(host, PHY_SDCLKDL_CNFG_R);
val &= ~(PHY_SDCLKDL_CNFG_UPDATE);
sdhci_writeb(host, val, PHY_SDCLKDL_CNFG_R);
/* configure phy pads */
val = rxsel;
val |= FIELD_PREP(PHY_PAD_WEAKPULL_MASK, PHY_PAD_WEAKPULL_PULLUP);
val |= FIELD_PREP(PHY_PAD_TXSLEW_CTRL_P_MASK, PHY_PAD_TXSLEW_CTRL_P);
val |= FIELD_PREP(PHY_PAD_TXSLEW_CTRL_N_MASK, PHY_PAD_TXSLEW_CTRL_N);
sdhci_writew(host, val, PHY_CMDPAD_CNFG_R);
sdhci_writew(host, val, PHY_DATAPAD_CNFG_R);
sdhci_writew(host, val, PHY_RSTNPAD_CNFG_R);
val = FIELD_PREP(PHY_PAD_TXSLEW_CTRL_P_MASK, PHY_PAD_TXSLEW_CTRL_P);
val |= FIELD_PREP(PHY_PAD_TXSLEW_CTRL_N_MASK, PHY_PAD_TXSLEW_CTRL_N);
sdhci_writew(host, val, PHY_CLKPAD_CNFG_R);
val = rxsel;
val |= FIELD_PREP(PHY_PAD_WEAKPULL_MASK, PHY_PAD_WEAKPULL_PULLDOWN);
val |= FIELD_PREP(PHY_PAD_TXSLEW_CTRL_P_MASK, PHY_PAD_TXSLEW_CTRL_P);
val |= FIELD_PREP(PHY_PAD_TXSLEW_CTRL_N_MASK, PHY_PAD_TXSLEW_CTRL_N);
sdhci_writew(host, val, PHY_STBPAD_CNFG_R);
/* enable data strobe mode */
if (rxsel == PHY_PAD_RXSEL_1V8) {
u8 sel = FIELD_PREP(PHY_DLLDL_CNFG_SLV_INPSEL_MASK, PHY_DLLDL_CNFG_SLV_INPSEL);
sdhci_writeb(host, sel, PHY_DLLDL_CNFG_R);
}
/* enable phy dll */
sdhci_writeb(host, PHY_DLL_CTRL_ENABLE, PHY_DLL_CTRL_R);
}
static void th1520_sdhci_set_phy(struct sdhci_host *host)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
u32 emmc_caps = MMC_CAP2_NO_SD | MMC_CAP2_NO_SDIO;
u16 emmc_ctrl;
dwcmshc_phy_init(host);
if ((host->mmc->caps2 & emmc_caps) == emmc_caps) {
emmc_ctrl = sdhci_readw(host, priv->vendor_specific_area1 + DWCMSHC_EMMC_CONTROL);
emmc_ctrl |= DWCMSHC_CARD_IS_EMMC;
sdhci_writew(host, emmc_ctrl, priv->vendor_specific_area1 + DWCMSHC_EMMC_CONTROL);
}
sdhci_writeb(host, FIELD_PREP(PHY_DLL_CNFG1_SLVDLY_MASK, PHY_DLL_CNFG1_SLVDLY) |
PHY_DLL_CNFG1_WAITCYCLE, PHY_DLL_CNFG1_R);
}
static void dwcmshc_set_uhs_signaling(struct sdhci_host *host,
unsigned int timing)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
u16 ctrl, ctrl_2;
ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
/* Select Bus Speed Mode for host */
ctrl_2 &= ~SDHCI_CTRL_UHS_MASK;
if ((timing == MMC_TIMING_MMC_HS200) ||
(timing == MMC_TIMING_UHS_SDR104))
ctrl_2 |= SDHCI_CTRL_UHS_SDR104;
else if (timing == MMC_TIMING_UHS_SDR12)
ctrl_2 |= SDHCI_CTRL_UHS_SDR12;
else if ((timing == MMC_TIMING_UHS_SDR25) ||
(timing == MMC_TIMING_MMC_HS))
ctrl_2 |= SDHCI_CTRL_UHS_SDR25;
else if (timing == MMC_TIMING_UHS_SDR50)
ctrl_2 |= SDHCI_CTRL_UHS_SDR50;
else if ((timing == MMC_TIMING_UHS_DDR50) ||
(timing == MMC_TIMING_MMC_DDR52))
ctrl_2 |= SDHCI_CTRL_UHS_DDR50;
else if (timing == MMC_TIMING_MMC_HS400) {
/* set CARD_IS_EMMC bit to enable Data Strobe for HS400 */
ctrl = sdhci_readw(host, priv->vendor_specific_area1 + DWCMSHC_EMMC_CONTROL);
ctrl |= DWCMSHC_CARD_IS_EMMC;
sdhci_writew(host, ctrl, priv->vendor_specific_area1 + DWCMSHC_EMMC_CONTROL);
ctrl_2 |= DWCMSHC_CTRL_HS400;
}
if (priv->flags & FLAG_IO_FIXED_1V8)
ctrl_2 |= SDHCI_CTRL_VDD_180;
sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
}
static void th1520_set_uhs_signaling(struct sdhci_host *host,
unsigned int timing)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
dwcmshc_set_uhs_signaling(host, timing);
if (timing == MMC_TIMING_MMC_HS400)
priv->delay_line = PHY_SDCLKDL_DC_HS400;
else
sdhci_writeb(host, 0 , PHY_DLLDL_CNFG_R);
th1520_sdhci_set_phy(host);
}
static void dwcmshc_hs400_enhanced_strobe(struct mmc_host *mmc,
struct mmc_ios *ios)
{
u32 vendor;
struct sdhci_host *host = mmc_priv(mmc);
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
int reg = priv->vendor_specific_area1 + DWCMSHC_EMMC_CONTROL;
vendor = sdhci_readl(host, reg);
if (ios->enhanced_strobe)
vendor |= DWCMSHC_ENHANCED_STROBE;
else
vendor &= ~DWCMSHC_ENHANCED_STROBE;
sdhci_writel(host, vendor, reg);
}
static int dwcmshc_execute_tuning(struct mmc_host *mmc, u32 opcode)
{
int err = sdhci_execute_tuning(mmc, opcode);
struct sdhci_host *host = mmc_priv(mmc);
if (err)
return err;
/*
* Tuning can leave the IP in an active state ( Buffer Read Enable bit
* set ) which prevents the entry to low power states ( i . e . S0i3 ) . Data
* reset will clear it .
*/
sdhci_reset(host, SDHCI_RESET_DATA);
return 0 ;
}
static u32 dwcmshc_cqe_irq_handler(struct sdhci_host *host, u32 intmask)
{
int cmd_error = 0 ;
int data_error = 0 ;
if (!sdhci_cqe_irq(host, intmask, &cmd_error, &data_error))
return intmask;
cqhci_irq(host->mmc, intmask, cmd_error, data_error);
return 0 ;
}
static void dwcmshc_sdhci_cqe_enable(struct mmc_host *mmc)
{
struct sdhci_host *host = mmc_priv(mmc);
u8 ctrl;
sdhci_writew(host, DWCMSHC_SDHCI_CQE_TRNS_MODE, SDHCI_TRANSFER_MODE);
sdhci_cqe_enable(mmc);
/*
* The " DesignWare Cores Mobile Storage Host Controller
* DWC_mshc / DWC_mshc_lite Databook " says :
* when Host Version 4 Enable " is 1 in Host Control 2 register ,
* SDHCI_CTRL_ADMA32 bit means ADMA2 is selected .
* Selection of 32 - bit / 64 - bit System Addressing :
* either 32 - bit or 64 - bit system addressing is selected by
* 64 - bit Addressing bit in Host Control 2 register .
*
* On the other hand the " DesignWare Cores Mobile Storage Host
* Controller DWC_mshc / DWC_mshc_lite User Guide " says , that we have to
* set DMA_SEL to ADMA2 _ only_ mode in the Host Control 2 register .
*/
ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
ctrl &= ~SDHCI_CTRL_DMA_MASK;
ctrl |= SDHCI_CTRL_ADMA32;
sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
}
static void dwcmshc_set_tran_desc(struct cqhci_host *cq_host, u8 **desc,
dma_addr_t addr, int len, bool end, bool dma64)
{
int tmplen, offset;
if (likely(!len || BOUNDARY_OK(addr, len))) {
cqhci_set_tran_desc(*desc, addr, len, end, dma64);
return ;
}
offset = addr & (SZ_128M - 1 );
tmplen = SZ_128M - offset;
cqhci_set_tran_desc(*desc, addr, tmplen, false , dma64);
addr += tmplen;
len -= tmplen;
*desc += cq_host->trans_desc_len;
cqhci_set_tran_desc(*desc, addr, len, end, dma64);
}
static void dwcmshc_cqhci_dumpregs(struct mmc_host *mmc)
{
sdhci_dumpregs(mmc_priv(mmc));
}
static void dwcmshc_rk3568_set_clock(struct sdhci_host *host, unsigned int clock)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct dwcmshc_priv *dwc_priv = sdhci_pltfm_priv(pltfm_host);
struct rk35xx_priv *priv = dwc_priv->priv;
u8 txclk_tapnum = DLL_TXCLK_TAPNUM_DEFAULT;
u32 extra, reg;
int err;
host->mmc->actual_clock = 0 ;
if (clock == 0 ) {
/* Disable interface clock at initial state. */
sdhci_set_clock(host, clock);
return ;
}
/* Rockchip platform only support 375KHz for identify mode */
if (clock <= 400000 )
clock = 375000 ;
err = clk_set_rate(pltfm_host->clk, clock);
if (err)
dev_err(mmc_dev(host->mmc), "fail to set clock %d" , clock);
sdhci_set_clock(host, clock);
/* Disable cmd conflict check */
reg = dwc_priv->vendor_specific_area1 + DWCMSHC_HOST_CTRL3;
extra = sdhci_readl(host, reg);
extra &= ~BIT(0 );
sdhci_writel(host, extra, reg);
if (clock <= 52000000 ) {
/*
* Disable DLL and reset both of sample and drive clock .
* The bypass bit and start bit need to be set if DLL is not locked .
*/
sdhci_writel(host, DWCMSHC_EMMC_DLL_BYPASS | DWCMSHC_EMMC_DLL_START, DWCMSHC_EMMC_DLL_CTRL);
sdhci_writel(host, DLL_RXCLK_ORI_GATE, DWCMSHC_EMMC_DLL_RXCLK);
sdhci_writel(host, 0 , DWCMSHC_EMMC_DLL_TXCLK);
sdhci_writel(host, 0 , DECMSHC_EMMC_DLL_CMDOUT);
/*
* Before switching to hs400es mode , the driver will enable
* enhanced strobe first . PHY needs to configure the parameters
* of enhanced strobe first .
*/
extra = DWCMSHC_EMMC_DLL_DLYENA |
DLL_STRBIN_DELAY_NUM_SEL |
DLL_STRBIN_DELAY_NUM_DEFAULT << DLL_STRBIN_DELAY_NUM_OFFSET;
sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_STRBIN);
return ;
}
/* Reset DLL */
sdhci_writel(host, BIT(1 ), DWCMSHC_EMMC_DLL_CTRL);
udelay(1 );
sdhci_writel(host, 0 x0, DWCMSHC_EMMC_DLL_CTRL);
/*
* We shouldn ' t set DLL_RXCLK_NO_INVERTER for identify mode but
* we must set it in higher speed mode .
*/
extra = DWCMSHC_EMMC_DLL_DLYENA;
if (priv->devtype == DWCMSHC_RK3568)
extra |= DLL_RXCLK_NO_INVERTER << DWCMSHC_EMMC_DLL_RXCLK_SRCSEL;
sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_RXCLK);
/* Init DLL settings */
extra = 0 x5 << DWCMSHC_EMMC_DLL_START_POINT |
0 x2 << DWCMSHC_EMMC_DLL_INC |
DWCMSHC_EMMC_DLL_START;
sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_CTRL);
err = readl_poll_timeout(host->ioaddr + DWCMSHC_EMMC_DLL_STATUS0,
extra, DLL_LOCK_WO_TMOUT(extra), 1 ,
500 * USEC_PER_MSEC);
if (err) {
dev_err(mmc_dev(host->mmc), "DLL lock timeout!\n" );
return ;
}
extra = 0 x1 << 16 | /* tune clock stop en */
0 x3 << 17 | /* pre-change delay */
0 x3 << 19 ; /* post-change delay */
sdhci_writel(host, extra, dwc_priv->vendor_specific_area1 + DWCMSHC_EMMC_ATCTRL);
if (host->mmc->ios.timing == MMC_TIMING_MMC_HS200 ||
host->mmc->ios.timing == MMC_TIMING_MMC_HS400)
txclk_tapnum = priv->txclk_tapnum;
if ((priv->devtype == DWCMSHC_RK3588) && host->mmc->ios.timing == MMC_TIMING_MMC_HS400) {
txclk_tapnum = DLL_TXCLK_TAPNUM_90_DEGREES;
extra = DLL_CMDOUT_SRC_CLK_NEG |
DLL_CMDOUT_EN_SRC_CLK_NEG |
DWCMSHC_EMMC_DLL_DLYENA |
DLL_CMDOUT_TAPNUM_90_DEGREES |
DLL_CMDOUT_TAPNUM_FROM_SW;
sdhci_writel(host, extra, DECMSHC_EMMC_DLL_CMDOUT);
}
extra = DWCMSHC_EMMC_DLL_DLYENA |
DLL_TXCLK_TAPNUM_FROM_SW |
DLL_RXCLK_NO_INVERTER << DWCMSHC_EMMC_DLL_RXCLK_SRCSEL |
txclk_tapnum;
sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_TXCLK);
extra = DWCMSHC_EMMC_DLL_DLYENA |
DLL_STRBIN_TAPNUM_DEFAULT |
DLL_STRBIN_TAPNUM_FROM_SW;
sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_STRBIN);
}
static void rk35xx_sdhci_reset(struct sdhci_host *host, u8 mask)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct dwcmshc_priv *dwc_priv = sdhci_pltfm_priv(pltfm_host);
struct rk35xx_priv *priv = dwc_priv->priv;
if (mask & SDHCI_RESET_ALL && priv->reset) {
reset_control_assert(priv->reset);
udelay(1 );
reset_control_deassert(priv->reset);
}
sdhci_reset(host, mask);
}
static int dwcmshc_rk35xx_init(struct device *dev, struct sdhci_host *host,
struct dwcmshc_priv *dwc_priv)
{
static const char * const clk_ids[] = {"axi" , "block" , "timer" };
struct rk35xx_priv *priv;
int err;
priv = devm_kzalloc(dev, sizeof (struct rk35xx_priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
if (of_device_is_compatible(dev->of_node, "rockchip,rk3588-dwcmshc" ))
priv->devtype = DWCMSHC_RK3588;
else
priv->devtype = DWCMSHC_RK3568;
priv->reset = devm_reset_control_array_get_optional_exclusive(mmc_dev(host->mmc));
if (IS_ERR(priv->reset)) {
err = PTR_ERR(priv->reset);
dev_err(mmc_dev(host->mmc), "failed to get reset control %d\n" , err);
return err;
}
err = dwcmshc_get_enable_other_clks(mmc_dev(host->mmc), dwc_priv,
ARRAY_SIZE(clk_ids), clk_ids);
if (err)
return err;
if (of_property_read_u8(mmc_dev(host->mmc)->of_node, "rockchip,txclk-tapnum" ,
&priv->txclk_tapnum))
priv->txclk_tapnum = DLL_TXCLK_TAPNUM_DEFAULT;
/* Disable cmd conflict check */
sdhci_writel(host, 0 x0, dwc_priv->vendor_specific_area1 + DWCMSHC_HOST_CTRL3);
/* Reset previous settings */
sdhci_writel(host, 0 , DWCMSHC_EMMC_DLL_TXCLK);
sdhci_writel(host, 0 , DWCMSHC_EMMC_DLL_STRBIN);
dwc_priv->priv = priv;
return 0 ;
}
static void dwcmshc_rk35xx_postinit(struct sdhci_host *host, struct dwcmshc_priv *dwc_priv)
{
/*
* Don ' t support highspeed bus mode with low clk speed as we
* cannot use DLL for this condition .
*/
if (host->mmc->f_max <= 52000000 ) {
dev_info(mmc_dev(host->mmc), "Disabling HS200/HS400, frequency too low (%d)\n" ,
host->mmc->f_max);
host->mmc->caps2 &= ~(MMC_CAP2_HS200 | MMC_CAP2_HS400);
host->mmc->caps &= ~(MMC_CAP_3_3V_DDR | MMC_CAP_1_8V_DDR);
}
}
static void dwcmshc_rk3576_postinit(struct sdhci_host *host, struct dwcmshc_priv *dwc_priv)
{
struct device *dev = mmc_dev(host->mmc);
int ret;
/*
* This works around the design of the RK3576 ' s power domains , which
* makes the PD_NVM power domain , which the sdhci controller on the
* RK3576 is in , never come back the same way once it ' s run - time
* suspended once . This can happen during early kernel boot if no driver
* is using either PD_NVM or its child power domain PD_SDGMAC for a
* short moment , leading to it being turned off to save power . By
* keeping it on , sdhci suspending won ' t lead to PD_NVM becoming a
* candidate for getting turned off .
*/
ret = dev_pm_genpd_rpm_always_on(dev, true );
if (ret && ret != -EOPNOTSUPP)
dev_warn(dev, "failed to set PD rpm always on, SoC may hang later: %pe\n" ,
ERR_PTR(ret));
dwcmshc_rk35xx_postinit(host, dwc_priv);
}
static int th1520_execute_tuning(struct sdhci_host *host, u32 opcode)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
u32 val = 0 ;
if (host->flags & SDHCI_HS400_TUNING)
return 0 ;
sdhci_writeb(host, FIELD_PREP(PHY_ATDL_CNFG_INPSEL_MASK, PHY_ATDL_CNFG_INPSEL),
PHY_ATDL_CNFG_R);
val = sdhci_readl(host, priv->vendor_specific_area1 + DWCMSHC_EMMC_ATCTRL);
/*
* configure tuning settings :
* - center phase select code driven in block gap interval
* - disable reporting of framing errors
* - disable software managed tuning
* - disable user selection of sampling window edges ,
* instead tuning calculated edges are used
*/
val &= ~(AT_CTRL_CI_SEL | AT_CTRL_RPT_TUNE_ERR | AT_CTRL_SW_TUNE_EN |
FIELD_PREP(AT_CTRL_WIN_EDGE_SEL_MASK, AT_CTRL_WIN_EDGE_SEL));
/*
* configure tuning settings :
* - enable auto - tuning
* - enable sampling window threshold
* - stop clocks during phase code change
* - set max latency in cycles between tx and rx clocks
* - set max latency in cycles to switch output phase
* - set max sampling window threshold value
*/
val |= AT_CTRL_AT_EN | AT_CTRL_SWIN_TH_EN | AT_CTRL_TUNE_CLK_STOP_EN;
val |= FIELD_PREP(AT_CTRL_PRE_CHANGE_DLY_MASK, AT_CTRL_PRE_CHANGE_DLY);
val |= FIELD_PREP(AT_CTRL_POST_CHANGE_DLY_MASK, AT_CTRL_POST_CHANGE_DLY);
val |= FIELD_PREP(AT_CTRL_SWIN_TH_VAL_MASK, AT_CTRL_SWIN_TH_VAL);
sdhci_writel(host, val, priv->vendor_specific_area1 + DWCMSHC_EMMC_ATCTRL);
val = sdhci_readl(host, priv->vendor_specific_area1 + DWCMSHC_EMMC_ATCTRL);
/* perform tuning */
sdhci_start_tuning(host);
host->tuning_loop_count = 128 ;
host->tuning_err = __sdhci_execute_tuning(host, opcode);
if (host->tuning_err) {
/* disable auto-tuning upon tuning error */
val &= ~AT_CTRL_AT_EN;
sdhci_writel(host, val, priv->vendor_specific_area1 + DWCMSHC_EMMC_ATCTRL);
dev_err(mmc_dev(host->mmc), "tuning failed: %d\n" , host->tuning_err);
return -EIO;
}
sdhci_end_tuning(host);
return 0 ;
}
static void th1520_sdhci_reset(struct sdhci_host *host, u8 mask)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
u16 ctrl_2;
sdhci_reset(host, mask);
/* The T-Head 1520 SoC does not comply with the SDHCI specification
* regarding the " Software Reset for CMD line should clear ' Command
* Complete ' in the Normal Interrupt Status Register . " Clear the bit
* here to compensate for this quirk .
*/
if (mask & SDHCI_RESET_CMD)
sdhci_writel(host, SDHCI_INT_RESPONSE, SDHCI_INT_STATUS);
if (priv->flags & FLAG_IO_FIXED_1V8) {
ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
if (!(ctrl_2 & SDHCI_CTRL_VDD_180)) {
ctrl_2 |= SDHCI_CTRL_VDD_180;
sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
}
}
}
static int th1520_init(struct device *dev,
struct sdhci_host *host,
struct dwcmshc_priv *dwc_priv)
{
dwc_priv->delay_line = PHY_SDCLKDL_DC_DEFAULT;
if (device_property_read_bool(dev, "mmc-ddr-1_8v" ) ||
device_property_read_bool(dev, "mmc-hs200-1_8v" ) ||
device_property_read_bool(dev, "mmc-hs400-1_8v" ))
dwc_priv->flags |= FLAG_IO_FIXED_1V8;
else
dwc_priv->flags &= ~FLAG_IO_FIXED_1V8;
/*
* start_signal_voltage_switch ( ) will try 3 . 3 V first
* then 1 . 8 V . Use SDHCI_SIGNALING_180 rather than
* SDHCI_SIGNALING_330 to avoid setting voltage to 3 . 3 V
* in sdhci_start_signal_voltage_switch ( ) .
*/
if (dwc_priv->flags & FLAG_IO_FIXED_1V8) {
host->flags &= ~SDHCI_SIGNALING_330;
host->flags |= SDHCI_SIGNALING_180;
}
sdhci_enable_v4_mode(host);
return 0 ;
}
static void cv18xx_sdhci_reset(struct sdhci_host *host, u8 mask)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
u32 val, emmc_caps = MMC_CAP2_NO_SD | MMC_CAP2_NO_SDIO;
sdhci_reset(host, mask);
if ((host->mmc->caps2 & emmc_caps) == emmc_caps) {
val = sdhci_readl(host, priv->vendor_specific_area1 + CV18XX_SDHCI_MSHC_CTRL);
val |= CV18XX_EMMC_FUNC_EN;
sdhci_writel(host, val, priv->vendor_specific_area1 + CV18XX_SDHCI_MSHC_CTRL);
}
val = sdhci_readl(host, priv->vendor_specific_area1 + CV18XX_SDHCI_MSHC_CTRL);
val |= CV18XX_LATANCY_1T;
sdhci_writel(host, val, priv->vendor_specific_area1 + CV18XX_SDHCI_MSHC_CTRL);
val = sdhci_readl(host, priv->vendor_specific_area1 + CV18XX_SDHCI_PHY_CONFIG);
val |= CV18XX_PHY_TX_BPS;
sdhci_writel(host, val, priv->vendor_specific_area1 + CV18XX_SDHCI_PHY_CONFIG);
val = (FIELD_PREP(CV18XX_PHY_TX_DLY_MSK, 0 ) |
FIELD_PREP(CV18XX_PHY_TX_SRC_MSK, CV18XX_PHY_TX_SRC_INVERT_CLK_TX) |
FIELD_PREP(CV18XX_PHY_RX_DLY_MSK, 0 ) |
FIELD_PREP(CV18XX_PHY_RX_SRC_MSK, CV18XX_PHY_RX_SRC_INVERT_RX_CLK));
sdhci_writel(host, val, priv->vendor_specific_area1 + CV18XX_SDHCI_PHY_TX_RX_DLY);
}
static void cv18xx_sdhci_set_tap(struct sdhci_host *host, int tap)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
u16 clk;
u32 val;
clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
clk &= ~SDHCI_CLOCK_CARD_EN;
sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
val = sdhci_readl(host, priv->vendor_specific_area1 + CV18XX_SDHCI_MSHC_CTRL);
val &= ~CV18XX_LATANCY_1T;
sdhci_writel(host, val, priv->vendor_specific_area1 + CV18XX_SDHCI_MSHC_CTRL);
val = (FIELD_PREP(CV18XX_PHY_TX_DLY_MSK, 0 ) |
FIELD_PREP(CV18XX_PHY_TX_SRC_MSK, CV18XX_PHY_TX_SRC_INVERT_CLK_TX) |
FIELD_PREP(CV18XX_PHY_RX_DLY_MSK, tap));
sdhci_writel(host, val, priv->vendor_specific_area1 + CV18XX_SDHCI_PHY_TX_RX_DLY);
sdhci_writel(host, 0 , priv->vendor_specific_area1 + CV18XX_SDHCI_PHY_CONFIG);
clk |= SDHCI_CLOCK_CARD_EN;
sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
usleep_range(1000 , 2000 );
}
static int cv18xx_retry_tuning(struct mmc_host *mmc, u32 opcode, int *cmd_error)
{
int ret, retry = 0 ;
while (retry < CV18XX_RETRY_TUNING_MAX) {
ret = mmc_send_tuning(mmc, opcode, NULL);
if (ret)
return ret;
retry++;
}
return 0 ;
}
static void cv18xx_sdhci_post_tuning(struct sdhci_host *host)
{
u32 val;
val = sdhci_readl(host, SDHCI_INT_STATUS);
val |= SDHCI_INT_DATA_AVAIL;
sdhci_writel(host, val, SDHCI_INT_STATUS);
sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
}
static int cv18xx_sdhci_execute_tuning(struct sdhci_host *host, u32 opcode)
{
int min, max, avg, ret;
int win_length, target_min, target_max, target_win_length;
min = max = 0 ;
target_win_length = 0 ;
sdhci_reset_tuning(host);
while (max < CV18XX_TUNE_MAX) {
/* find the mininum delay first which can pass tuning */
while (min < CV18XX_TUNE_MAX) {
cv18xx_sdhci_set_tap(host, min);
if (!cv18xx_retry_tuning(host->mmc, opcode, NULL))
break ;
min += CV18XX_TUNE_STEP;
}
/* find the maxinum delay which can not pass tuning */
max = min + CV18XX_TUNE_STEP;
while (max < CV18XX_TUNE_MAX) {
cv18xx_sdhci_set_tap(host, max);
if (cv18xx_retry_tuning(host->mmc, opcode, NULL)) {
max -= CV18XX_TUNE_STEP;
break ;
}
max += CV18XX_TUNE_STEP;
}
win_length = max - min + 1 ;
/* get the largest pass window */
if (win_length > target_win_length) {
target_win_length = win_length;
target_min = min;
target_max = max;
}
/* continue to find the next pass window */
min = max + CV18XX_TUNE_STEP;
}
cv18xx_sdhci_post_tuning(host);
/* use average delay to get the best timing */
avg = (target_min + target_max) / 2 ;
cv18xx_sdhci_set_tap(host, avg);
ret = mmc_send_tuning(host->mmc, opcode, NULL);
dev_dbg(mmc_dev(host->mmc), "tuning %s at 0x%x ret %d\n" ,
ret ? "failed" : "passed" , avg, ret);
return ret;
}
static inline void sg2042_sdhci_phy_init(struct sdhci_host *host)
{
u32 val;
/* Asset phy reset & set tx drive strength */
val = sdhci_readl(host, PHY_CNFG_R);
val &= ~PHY_CNFG_RSTN_DEASSERT;
val |= FIELD_PREP(PHY_CNFG_PHY_PWRGOOD_MASK, 1 );
val |= FIELD_PREP(PHY_CNFG_PAD_SP_MASK, PHY_CNFG_PAD_SP_SG2042);
val |= FIELD_PREP(PHY_CNFG_PAD_SN_MASK, PHY_CNFG_PAD_SN_SG2042);
sdhci_writel(host, val, PHY_CNFG_R);
/* Configure phy pads */
val = PHY_PAD_RXSEL_3V3;
val |= FIELD_PREP(PHY_PAD_WEAKPULL_MASK, PHY_PAD_WEAKPULL_PULLUP);
val |= FIELD_PREP(PHY_PAD_TXSLEW_CTRL_P_MASK, PHY_PAD_TXSLEW_CTRL_P);
val |= FIELD_PREP(PHY_PAD_TXSLEW_CTRL_N_MASK, PHY_PAD_TXSLEW_CTRL_N_SG2042);
sdhci_writew(host, val, PHY_CMDPAD_CNFG_R);
sdhci_writew(host, val, PHY_DATAPAD_CNFG_R);
sdhci_writew(host, val, PHY_RSTNPAD_CNFG_R);
val = PHY_PAD_RXSEL_3V3;
val |= FIELD_PREP(PHY_PAD_TXSLEW_CTRL_P_MASK, PHY_PAD_TXSLEW_CTRL_P);
val |= FIELD_PREP(PHY_PAD_TXSLEW_CTRL_N_MASK, PHY_PAD_TXSLEW_CTRL_N_SG2042);
sdhci_writew(host, val, PHY_CLKPAD_CNFG_R);
val = PHY_PAD_RXSEL_3V3;
val |= FIELD_PREP(PHY_PAD_WEAKPULL_MASK, PHY_PAD_WEAKPULL_PULLDOWN);
val |= FIELD_PREP(PHY_PAD_TXSLEW_CTRL_P_MASK, PHY_PAD_TXSLEW_CTRL_P);
val |= FIELD_PREP(PHY_PAD_TXSLEW_CTRL_N_MASK, PHY_PAD_TXSLEW_CTRL_N_SG2042);
sdhci_writew(host, val, PHY_STBPAD_CNFG_R);
/* Configure delay line */
/* Enable fixed delay */
sdhci_writeb(host, PHY_SDCLKDL_CNFG_EXTDLY_EN, PHY_SDCLKDL_CNFG_R);
/*
* Set delay line .
* Its recommended that bit UPDATE_DC [ 4 ] is 1 when SDCLKDL_DC is being written .
* Ensure UPDATE_DC [ 4 ] is ' 0 ' when not updating code .
*/
val = sdhci_readb(host, PHY_SDCLKDL_CNFG_R);
val |= PHY_SDCLKDL_CNFG_UPDATE;
sdhci_writeb(host, val, PHY_SDCLKDL_CNFG_R);
/* Add 10 * 70ps = 0.7ns for output delay */
sdhci_writeb(host, 10 , PHY_SDCLKDL_DC_R);
val = sdhci_readb(host, PHY_SDCLKDL_CNFG_R);
val &= ~(PHY_SDCLKDL_CNFG_UPDATE);
sdhci_writeb(host, val, PHY_SDCLKDL_CNFG_R);
/* Set SMPLDL_CNFG, Bypass */
sdhci_writeb(host, PHY_SMPLDL_CNFG_BYPASS_EN, PHY_SMPLDL_CNFG_R);
/* Set ATDL_CNFG, tuning clk not use for init */
val = FIELD_PREP(PHY_ATDL_CNFG_INPSEL_MASK, PHY_ATDL_CNFG_INPSEL_SG2042);
sdhci_writeb(host, val, PHY_ATDL_CNFG_R);
/* Deasset phy reset */
val = sdhci_readl(host, PHY_CNFG_R);
val |= PHY_CNFG_RSTN_DEASSERT;
sdhci_writel(host, val, PHY_CNFG_R);
}
static void sg2042_sdhci_reset(struct sdhci_host *host, u8 mask)
{
sdhci_reset(host, mask);
if (mask & SDHCI_RESET_ALL)
sg2042_sdhci_phy_init(host);
}
static int sg2042_init(struct device *dev, struct sdhci_host *host,
struct dwcmshc_priv *dwc_priv)
{
static const char * const clk_ids[] = {"timer" };
return dwcmshc_get_enable_other_clks(mmc_dev(host->mmc), dwc_priv,
ARRAY_SIZE(clk_ids), clk_ids);
}
static const struct sdhci_ops sdhci_dwcmshc_ops = {
.set_clock = sdhci_set_clock,
.set_bus_width = sdhci_set_bus_width,
.set_uhs_signaling = dwcmshc_set_uhs_signaling,
.get_max_clock = dwcmshc_get_max_clock,
.reset = sdhci_reset,
.adma_write_desc = dwcmshc_adma_write_desc,
.irq = dwcmshc_cqe_irq_handler,
};
#ifdef CONFIG_ACPI
static void dwcmshc_bf3_hw_reset(struct sdhci_host *host)
{
struct arm_smccc_res res = { 0 };
arm_smccc_smc(BLUEFIELD_SMC_SET_EMMC_RST_N, 0 , 0 , 0 , 0 , 0 , 0 , 0 , &res);
if (res.a0)
pr_err("%s: RST_N failed.\n" , mmc_hostname(host->mmc));
}
static const struct sdhci_ops sdhci_dwcmshc_bf3_ops = {
.set_clock = sdhci_set_clock,
.set_bus_width = sdhci_set_bus_width,
.set_uhs_signaling = dwcmshc_set_uhs_signaling,
.get_max_clock = dwcmshc_get_max_clock,
.reset = sdhci_reset,
.adma_write_desc = dwcmshc_adma_write_desc,
.irq = dwcmshc_cqe_irq_handler,
.hw_reset = dwcmshc_bf3_hw_reset,
};
#endif
static const struct sdhci_ops sdhci_dwcmshc_rk35xx_ops = {
.set_clock = dwcmshc_rk3568_set_clock,
.set_bus_width = sdhci_set_bus_width,
.set_uhs_signaling = dwcmshc_set_uhs_signaling,
.get_max_clock = rk35xx_get_max_clock,
.reset = rk35xx_sdhci_reset,
.adma_write_desc = dwcmshc_adma_write_desc,
.irq = dwcmshc_cqe_irq_handler,
};
static const struct sdhci_ops sdhci_dwcmshc_th1520_ops = {
.set_clock = sdhci_set_clock,
.set_bus_width = sdhci_set_bus_width,
.set_uhs_signaling = th1520_set_uhs_signaling,
.get_max_clock = dwcmshc_get_max_clock,
.reset = th1520_sdhci_reset,
.adma_write_desc = dwcmshc_adma_write_desc,
.voltage_switch = dwcmshc_phy_init,
.platform_execute_tuning = th1520_execute_tuning,
};
static const struct sdhci_ops sdhci_dwcmshc_cv18xx_ops = {
.set_clock = sdhci_set_clock,
.set_bus_width = sdhci_set_bus_width,
.set_uhs_signaling = dwcmshc_set_uhs_signaling,
.get_max_clock = dwcmshc_get_max_clock,
.reset = cv18xx_sdhci_reset,
.adma_write_desc = dwcmshc_adma_write_desc,
.platform_execute_tuning = cv18xx_sdhci_execute_tuning,
};
static const struct sdhci_ops sdhci_dwcmshc_sg2042_ops = {
.set_clock = sdhci_set_clock,
.set_bus_width = sdhci_set_bus_width,
.set_uhs_signaling = dwcmshc_set_uhs_signaling,
.get_max_clock = dwcmshc_get_max_clock,
.reset = sg2042_sdhci_reset,
.adma_write_desc = dwcmshc_adma_write_desc,
.platform_execute_tuning = th1520_execute_tuning,
};
static const struct dwcmshc_pltfm_data sdhci_dwcmshc_pdata = {
.pdata = {
.ops = &sdhci_dwcmshc_ops,
.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
},
};
#ifdef CONFIG_ACPI
static const struct dwcmshc_pltfm_data sdhci_dwcmshc_bf3_pdata = {
.pdata = {
.ops = &sdhci_dwcmshc_bf3_ops,
.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
SDHCI_QUIRK2_ACMD23_BROKEN,
},
};
#endif
static const struct dwcmshc_pltfm_data sdhci_dwcmshc_rk35xx_pdata = {
.pdata = {
.ops = &sdhci_dwcmshc_rk35xx_ops,
.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN |
SDHCI_QUIRK_BROKEN_TIMEOUT_VAL,
.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN,
},
.init = dwcmshc_rk35xx_init,
.postinit = dwcmshc_rk35xx_postinit,
};
static const struct dwcmshc_pltfm_data sdhci_dwcmshc_rk3576_pdata = {
.pdata = {
.ops = &sdhci_dwcmshc_rk35xx_ops,
.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN |
SDHCI_QUIRK_BROKEN_TIMEOUT_VAL,
.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN,
},
.init = dwcmshc_rk35xx_init,
.postinit = dwcmshc_rk3576_postinit,
};
static const struct dwcmshc_pltfm_data sdhci_dwcmshc_th1520_pdata = {
.pdata = {
.ops = &sdhci_dwcmshc_th1520_ops,
.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
},
.init = th1520_init,
};
static const struct dwcmshc_pltfm_data sdhci_dwcmshc_cv18xx_pdata = {
.pdata = {
.ops = &sdhci_dwcmshc_cv18xx_ops,
.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
},
};
static const struct dwcmshc_pltfm_data sdhci_dwcmshc_sg2042_pdata = {
.pdata = {
.ops = &sdhci_dwcmshc_sg2042_ops,
.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
},
.init = sg2042_init,
};
static const struct cqhci_host_ops dwcmshc_cqhci_ops = {
.enable = dwcmshc_sdhci_cqe_enable,
.disable = sdhci_cqe_disable,
.dumpregs = dwcmshc_cqhci_dumpregs,
.set_tran_desc = dwcmshc_set_tran_desc,
};
static void dwcmshc_cqhci_init(struct sdhci_host *host, struct platform_device *pdev)
{
struct cqhci_host *cq_host;
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
bool dma64 = false ;
u16 clk;
int err;
host->mmc->caps2 |= MMC_CAP2_CQE | MMC_CAP2_CQE_DCMD;
cq_host = devm_kzalloc(&pdev->dev, sizeof (*cq_host), GFP_KERNEL);
if (!cq_host) {
dev_err(mmc_dev(host->mmc), "Unable to setup CQE: not enough memory\n" );
goto dsbl_cqe_caps;
}
/*
* For dwcmshc host controller we have to enable internal clock
* before access to some registers from Vendor Specific Area 2 .
*/
clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
clk |= SDHCI_CLOCK_INT_EN;
sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
if (!(clk & SDHCI_CLOCK_INT_EN)) {
dev_err(mmc_dev(host->mmc), "Unable to setup CQE: internal clock enable error\n" );
goto free_cq_host;
}
cq_host->mmio = host->ioaddr + priv->vendor_specific_area2;
cq_host->ops = &dwcmshc_cqhci_ops;
/* Enable using of 128-bit task descriptors */
dma64 = host->flags & SDHCI_USE_64_BIT_DMA;
if (dma64) {
dev_dbg(mmc_dev(host->mmc), "128-bit task descriptors\n" );
cq_host->caps |= CQHCI_TASK_DESC_SZ_128;
}
err = cqhci_init(cq_host, host->mmc, dma64);
if (err) {
dev_err(mmc_dev(host->mmc), "Unable to setup CQE: error %d\n" , err);
goto int_clock_disable;
}
dev_dbg(mmc_dev(host->mmc), "CQE init done\n" );
return ;
int_clock_disable:
clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
clk &= ~SDHCI_CLOCK_INT_EN;
sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
free_cq_host:
devm_kfree(&pdev->dev, cq_host);
dsbl_cqe_caps:
host->mmc->caps2 &= ~(MMC_CAP2_CQE | MMC_CAP2_CQE_DCMD);
}
static const struct of_device_id sdhci_dwcmshc_dt_ids[] = {
{
.compatible = "rockchip,rk3588-dwcmshc" ,
.data = &sdhci_dwcmshc_rk35xx_pdata,
},
{
.compatible = "rockchip,rk3576-dwcmshc" ,
.data = &sdhci_dwcmshc_rk3576_pdata,
},
{
.compatible = "rockchip,rk3568-dwcmshc" ,
.data = &sdhci_dwcmshc_rk35xx_pdata,
},
{
.compatible = "snps,dwcmshc-sdhci" ,
.data = &sdhci_dwcmshc_pdata,
},
{
.compatible = "sophgo,cv1800b-dwcmshc" ,
.data = &sdhci_dwcmshc_cv18xx_pdata,
},
{
.compatible = "sophgo,sg2002-dwcmshc" ,
.data = &sdhci_dwcmshc_cv18xx_pdata,
},
{
.compatible = "thead,th1520-dwcmshc" ,
.data = &sdhci_dwcmshc_th1520_pdata,
},
{
.compatible = "sophgo,sg2042-dwcmshc" ,
.data = &sdhci_dwcmshc_sg2042_pdata,
},
{},
};
MODULE_DEVICE_TABLE(of, sdhci_dwcmshc_dt_ids);
#ifdef CONFIG_ACPI
static const struct acpi_device_id sdhci_dwcmshc_acpi_ids[] = {
{
.id = "MLNXBF30" ,
.driver_data = (kernel_ulong_t)&sdhci_dwcmshc_bf3_pdata,
},
{}
};
MODULE_DEVICE_TABLE(acpi, sdhci_dwcmshc_acpi_ids);
#endif
static int dwcmshc_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct sdhci_pltfm_host *pltfm_host;
struct sdhci_host *host;
struct dwcmshc_priv *priv;
const struct dwcmshc_pltfm_data *pltfm_data;
int err;
u32 extra, caps;
pltfm_data = device_get_match_data(&pdev->dev);
if (!pltfm_data) {
dev_err(&pdev->dev, "Error: No device match data found\n" );
return -ENODEV;
}
host = sdhci_pltfm_init(pdev, &pltfm_data->pdata,
sizeof (struct dwcmshc_priv));
if (IS_ERR(host))
return PTR_ERR(host);
/*
* extra adma table cnt for cross 128 M boundary handling .
*/
extra = DIV_ROUND_UP_ULL(dma_get_required_mask(dev), SZ_128M);
if (extra > SDHCI_MAX_SEGS)
extra = SDHCI_MAX_SEGS;
host->adma_table_cnt += extra;
pltfm_host = sdhci_priv(host);
priv = sdhci_pltfm_priv(pltfm_host);
if (dev->of_node) {
pltfm_host->clk = devm_clk_get(dev, "core" );
if (IS_ERR(pltfm_host->clk))
return dev_err_probe(dev, PTR_ERR(pltfm_host->clk),
"failed to get core clk\n" );
err = clk_prepare_enable(pltfm_host->clk);
if (err)
return err;
priv->bus_clk = devm_clk_get(dev, "bus" );
if (!IS_ERR(priv->bus_clk))
clk_prepare_enable(priv->bus_clk);
}
err = mmc_of_parse(host->mmc);
if (err)
goto err_clk;
sdhci_get_of_property(pdev);
priv->vendor_specific_area1 =
sdhci_readl(host, DWCMSHC_P_VENDOR_AREA1) & DWCMSHC_AREA1_MASK;
host->mmc_host_ops.request = dwcmshc_request;
host->mmc_host_ops.hs400_enhanced_strobe = dwcmshc_hs400_enhanced_strobe;
host->mmc_host_ops.execute_tuning = dwcmshc_execute_tuning;
if (pltfm_data->init) {
err = pltfm_data->init(&pdev->dev, host, priv);
if (err)
goto err_clk;
}
#ifdef CONFIG_ACPI
if (pltfm_data == &sdhci_dwcmshc_bf3_pdata)
sdhci_enable_v4_mode(host);
#endif
caps = sdhci_readl(host, SDHCI_CAPABILITIES);
if (caps & SDHCI_CAN_64BIT_V4)
sdhci_enable_v4_mode(host);
host->mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY;
pm_runtime_get_noresume(dev);
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
err = sdhci_setup_host(host);
if (err)
goto err_rpm;
/* Setup Command Queue Engine if enabled */
if (device_property_read_bool(&pdev->dev, "supports-cqe" )) {
priv->vendor_specific_area2 =
sdhci_readw(host, DWCMSHC_P_VENDOR_AREA2);
dwcmshc_cqhci_init(host, pdev);
}
if (pltfm_data->postinit)
pltfm_data->postinit(host, priv);
err = __sdhci_add_host(host);
if (err)
goto err_setup_host;
pm_runtime_put(dev);
return 0 ;
err_setup_host:
sdhci_cleanup_host(host);
err_rpm:
pm_runtime_disable(dev);
pm_runtime_put_noidle(dev);
err_clk:
clk_disable_unprepare(pltfm_host->clk);
clk_disable_unprepare(priv->bus_clk);
clk_bulk_disable_unprepare(priv->num_other_clks, priv->other_clks);
return err;
}
static void dwcmshc_disable_card_clk(struct sdhci_host *host)
{
u16 ctrl;
ctrl = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
if (ctrl & SDHCI_CLOCK_CARD_EN) {
ctrl &= ~SDHCI_CLOCK_CARD_EN;
sdhci_writew(host, ctrl, SDHCI_CLOCK_CONTROL);
}
}
static void dwcmshc_remove(struct platform_device *pdev)
{
struct sdhci_host *host = platform_get_drvdata(pdev);
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
pm_runtime_get_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
pm_runtime_put_noidle(&pdev->dev);
sdhci_remove_host(host, 0 );
dwcmshc_disable_card_clk(host);
clk_disable_unprepare(pltfm_host->clk);
clk_disable_unprepare(priv->bus_clk);
clk_bulk_disable_unprepare(priv->num_other_clks, priv->other_clks);
}
#ifdef CONFIG_PM_SLEEP
static int dwcmshc_suspend(struct device *dev)
{
struct sdhci_host *host = dev_get_drvdata(dev);
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
int ret;
pm_runtime_resume(dev);
if (host->mmc->caps2 & MMC_CAP2_CQE) {
ret = cqhci_suspend(host->mmc);
if (ret)
return ret;
}
ret = sdhci_suspend_host(host);
if (ret)
return ret;
clk_disable_unprepare(pltfm_host->clk);
if (!IS_ERR(priv->bus_clk))
clk_disable_unprepare(priv->bus_clk);
clk_bulk_disable_unprepare(priv->num_other_clks, priv->other_clks);
return ret;
}
static int dwcmshc_resume(struct device *dev)
{
struct sdhci_host *host = dev_get_drvdata(dev);
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
int ret;
ret = clk_prepare_enable(pltfm_host->clk);
if (ret)
return ret;
if (!IS_ERR(priv->bus_clk)) {
ret = clk_prepare_enable(priv->bus_clk);
if (ret)
goto disable_clk;
}
ret = clk_bulk_prepare_enable(priv->num_other_clks, priv->other_clks);
if (ret)
goto disable_bus_clk;
ret = sdhci_resume_host(host);
if (ret)
goto disable_other_clks;
if (host->mmc->caps2 & MMC_CAP2_CQE) {
ret = cqhci_resume(host->mmc);
if (ret)
goto disable_other_clks;
}
return 0 ;
disable_other_clks:
clk_bulk_disable_unprepare(priv->num_other_clks, priv->other_clks);
disable_bus_clk:
if (!IS_ERR(priv->bus_clk))
clk_disable_unprepare(priv->bus_clk);
disable_clk:
clk_disable_unprepare(pltfm_host->clk);
return ret;
}
#endif
#ifdef CONFIG_PM
static void dwcmshc_enable_card_clk(struct sdhci_host *host)
{
u16 ctrl;
ctrl = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
if ((ctrl & SDHCI_CLOCK_INT_EN) && !(ctrl & SDHCI_CLOCK_CARD_EN)) {
ctrl |= SDHCI_CLOCK_CARD_EN;
sdhci_writew(host, ctrl, SDHCI_CLOCK_CONTROL);
}
}
static int dwcmshc_runtime_suspend(struct device *dev)
{
struct sdhci_host *host = dev_get_drvdata(dev);
dwcmshc_disable_card_clk(host);
return 0 ;
}
static int dwcmshc_runtime_resume(struct device *dev)
{
struct sdhci_host *host = dev_get_drvdata(dev);
dwcmshc_enable_card_clk(host);
return 0 ;
}
#endif
static const struct dev_pm_ops dwcmshc_pmops = {
SET_SYSTEM_SLEEP_PM_OPS(dwcmshc_suspend, dwcmshc_resume)
SET_RUNTIME_PM_OPS(dwcmshc_runtime_suspend,
dwcmshc_runtime_resume, NULL)
};
static struct platform_driver sdhci_dwcmshc_driver = {
.driver = {
.name = "sdhci-dwcmshc" ,
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
.of_match_table = sdhci_dwcmshc_dt_ids,
.acpi_match_table = ACPI_PTR(sdhci_dwcmshc_acpi_ids),
.pm = &dwcmshc_pmops,
},
.probe = dwcmshc_probe,
.remove = dwcmshc_remove,
};
module_platform_driver(sdhci_dwcmshc_driver);
MODULE_DESCRIPTION("SDHCI platform driver for Synopsys DWC MSHC" );
MODULE_AUTHOR("Jisheng Zhang <jszhang@kernel.org>" );
MODULE_LICENSE("GPL v2" );
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