// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Arasan Secure Digital Host Controller Interface .
* Copyright ( C ) 2011 - 2012 Michal Simek < monstr @ monstr . eu >
* Copyright ( c ) 2012 Wind River Systems , Inc .
* Copyright ( C ) 2013 Pengutronix e . K .
* Copyright ( C ) 2013 Xilinx Inc .
*
* Based on sdhci - of - esdhc . c
*
* Copyright ( c ) 2007 Freescale Semiconductor , Inc .
* Copyright ( c ) 2009 MontaVista Software , Inc .
*
* Authors : Xiaobo Xie < X . Xie @ freescale . com >
* Anton Vorontsov < avorontsov @ ru . mvista . com >
*/
#include <linux/clk-provider.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/phy/phy.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#include <linux/firmware/xlnx-zynqmp.h>
#include "cqhci.h"
#include "sdhci-cqhci.h"
#include "sdhci-pltfm.h"
#define SDHCI_ARASAN_VENDOR_REGISTER 0 x78
#define SDHCI_ARASAN_ITAPDLY_REGISTER 0 xF0F8
#define SDHCI_ARASAN_ITAPDLY_SEL_MASK 0 xFF
#define SDHCI_ARASAN_OTAPDLY_REGISTER 0 xF0FC
#define SDHCI_ARASAN_OTAPDLY_SEL_MASK 0 x3F
#define SDHCI_ARASAN_CQE_BASE_ADDR 0 x200
#define VENDOR_ENHANCED_STROBE BIT(0 )
#define PHY_CLK_TOO_SLOW_HZ 400000
#define MIN_PHY_CLK_HZ 50000000
#define SDHCI_ITAPDLY_CHGWIN 0 x200
#define SDHCI_ITAPDLY_ENABLE 0 x100
#define SDHCI_OTAPDLY_ENABLE 0 x40
#define PHY_CTRL_REG1 0 x270
#define PHY_CTRL_ITAPDLY_ENA_MASK BIT(0 )
#define PHY_CTRL_ITAPDLY_SEL_MASK GENMASK(5 , 1 )
#define PHY_CTRL_ITAPDLY_SEL_SHIFT 1
#define PHY_CTRL_ITAP_CHG_WIN_MASK BIT(6 )
#define PHY_CTRL_OTAPDLY_ENA_MASK BIT(8 )
#define PHY_CTRL_OTAPDLY_SEL_MASK GENMASK(15 , 12 )
#define PHY_CTRL_OTAPDLY_SEL_SHIFT 12
#define PHY_CTRL_STRB_SEL_MASK GENMASK(23 , 16 )
#define PHY_CTRL_STRB_SEL_SHIFT 16
#define PHY_CTRL_TEST_CTRL_MASK GENMASK(31 , 24 )
#define PHY_CTRL_REG2 0 x274
#define PHY_CTRL_EN_DLL_MASK BIT(0 )
#define PHY_CTRL_DLL_RDY_MASK BIT(1 )
#define PHY_CTRL_FREQ_SEL_MASK GENMASK(6 , 4 )
#define PHY_CTRL_FREQ_SEL_SHIFT 4
#define PHY_CTRL_SEL_DLY_TX_MASK BIT(16 )
#define PHY_CTRL_SEL_DLY_RX_MASK BIT(17 )
#define FREQSEL_200M_170M 0 x0
#define FREQSEL_170M_140M 0 x1
#define FREQSEL_140M_110M 0 x2
#define FREQSEL_110M_80M 0 x3
#define FREQSEL_80M_50M 0 x4
#define FREQSEL_275M_250M 0 x5
#define FREQSEL_250M_225M 0 x6
#define FREQSEL_225M_200M 0 x7
#define PHY_DLL_TIMEOUT_MS 100
#define SDHCI_HW_RST_EN BIT(4 )
/* Default settings for ZynqMP Clock Phases */
#define ZYNQMP_ICLK_PHASE {0 , 63 , 63 , 0 , 63 , 0 , 0 , 183 , 54 , 0 , 0 }
#define ZYNQMP_OCLK_PHASE {0 , 72 , 60 , 0 , 60 , 72 , 135 , 48 , 72 , 135 , 0 }
#define VERSAL_ICLK_PHASE {0 , 132 , 132 , 0 , 132 , 0 , 0 , 162 , 90 , 0 , 0 }
#define VERSAL_OCLK_PHASE {0 , 60 , 48 , 0 , 48 , 72 , 90 , 36 , 60 , 90 , 0 }
#define VERSAL_NET_EMMC_ICLK_PHASE {0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 39 , 0 , 0 }
#define VERSAL_NET_EMMC_OCLK_PHASE {0 , 113 , 0 , 0 , 0 , 0 , 0 , 0 , 113 , 79 , 45 }
#define VERSAL_NET_PHY_CTRL_STRB90_STRB180_VAL 0 X77
/*
* On some SoCs the syscon area has a feature where the upper 16 - bits of
* each 32 - bit register act as a write mask for the lower 16 - bits . This allows
* atomic updates of the register without locking . This macro is used on SoCs
* that have that feature .
*/
#define HIWORD_UPDATE(val, mask, shift) \
((val) << (shift) | (mask) << ((shift) + 16 ))
#define CD_STABLE_TIMEOUT_US 1000000
#define CD_STABLE_MAX_SLEEP_US 10
/**
* struct sdhci_arasan_soc_ctl_field - Field used in sdhci_arasan_soc_ctl_map
*
* @ reg : Offset within the syscon of the register containing this field
* @ width : Number of bits for this field
* @ shift : Bit offset within @ reg of this field ( or - 1 if not avail )
*/
struct sdhci_arasan_soc_ctl_field {
u32 reg;
u16 width;
s16 shift;
};
/**
* struct sdhci_arasan_soc_ctl_map - Map in syscon to corecfg registers
*
* @ baseclkfreq : Where to find corecfg_baseclkfreq
* @ clockmultiplier : Where to find corecfg_clockmultiplier
* @ support64b : Where to find SUPPORT64B bit
* @ hiword_update : If true , use HIWORD_UPDATE to access the syscon
*
* It ' s up to the licensee of the Arsan IP block to make these available
* somewhere if needed . Presumably these will be scattered somewhere that ' s
* accessible via the syscon API .
*/
struct sdhci_arasan_soc_ctl_map {
struct sdhci_arasan_soc_ctl_field baseclkfreq;
struct sdhci_arasan_soc_ctl_field clockmultiplier;
struct sdhci_arasan_soc_ctl_field support64b;
bool hiword_update;
};
/**
* struct sdhci_arasan_clk_ops - Clock Operations for Arasan SD controller
*
* @ sdcardclk_ops : The output clock related operations
* @ sampleclk_ops : The sample clock related operations
*/
struct sdhci_arasan_clk_ops {
const struct clk_ops *sdcardclk_ops;
const struct clk_ops *sampleclk_ops;
};
/**
* struct sdhci_arasan_clk_data - Arasan Controller Clock Data .
*
* @ sdcardclk_hw : Struct for the clock we might provide to a PHY .
* @ sdcardclk : Pointer to normal ' struct clock ' for sdcardclk_hw .
* @ sampleclk_hw : Struct for the clock we might provide to a PHY .
* @ sampleclk : Pointer to normal ' struct clock ' for sampleclk_hw .
* @ clk_phase_in : Array of Input Clock Phase Delays for all speed modes
* @ clk_phase_out : Array of Output Clock Phase Delays for all speed modes
* @ set_clk_delays : Function pointer for setting Clock Delays
* @ clk_of_data : Platform specific runtime clock data storage pointer
*/
struct sdhci_arasan_clk_data {
struct clk_hw sdcardclk_hw;
struct clk *sdcardclk;
struct clk_hw sampleclk_hw;
struct clk *sampleclk;
int clk_phase_in[MMC_TIMING_MMC_HS400 + 1 ];
int clk_phase_out[MMC_TIMING_MMC_HS400 + 1 ];
void (*set_clk_delays)(struct sdhci_host *host);
void *clk_of_data;
};
/**
* struct sdhci_arasan_data - Arasan Controller Data
*
* @ host : Pointer to the main SDHCI host structure .
* @ clk_ahb : Pointer to the AHB clock
* @ phy : Pointer to the generic phy
* @ is_phy_on : True if the PHY is on ; false if not .
* @ internal_phy_reg : True if the PHY is within the Host controller .
* @ has_cqe : True if controller has command queuing engine .
* @ clk_data : Struct for the Arasan Controller Clock Data .
* @ clk_ops : Struct for the Arasan Controller Clock Operations .
* @ soc_ctl_base : Pointer to regmap for syscon for soc_ctl registers .
* @ soc_ctl_map : Map to get offsets into soc_ctl registers .
* @ quirks : Arasan deviations from spec .
*/
struct sdhci_arasan_data {
struct sdhci_host *host;
struct clk *clk_ahb;
struct phy *phy;
bool is_phy_on;
bool internal_phy_reg;
bool has_cqe;
struct sdhci_arasan_clk_data clk_data;
const struct sdhci_arasan_clk_ops *clk_ops;
struct regmap *soc_ctl_base;
const struct sdhci_arasan_soc_ctl_map *soc_ctl_map;
unsigned int quirks;
/* Controller does not have CD wired and will not function normally without */
#define SDHCI_ARASAN_QUIRK_FORCE_CDTEST BIT(0 )
/* Controller immediately reports SDHCI_CLOCK_INT_STABLE after enabling the
* internal clock even when the clock isn't stable */
#define SDHCI_ARASAN_QUIRK_CLOCK_UNSTABLE BIT(1 )
/*
* Some of the Arasan variations might not have timing requirements
* met at 25 MHz for Default Speed mode , those controllers work at
* 19 MHz instead
*/
#define SDHCI_ARASAN_QUIRK_CLOCK_25_BROKEN BIT(2 )
/* Enable CD stable check before power-up */
#define SDHCI_ARASAN_QUIRK_ENSURE_CD_STABLE BIT(3 )
};
struct sdhci_arasan_of_data {
const struct sdhci_arasan_soc_ctl_map *soc_ctl_map;
const struct sdhci_pltfm_data *pdata;
const struct sdhci_arasan_clk_ops *clk_ops;
u32 quirks;
};
static const struct sdhci_arasan_soc_ctl_map rk3399_soc_ctl_map = {
.baseclkfreq = { .reg = 0 xf000, .width = 8 , .shift = 8 },
.clockmultiplier = { .reg = 0 xf02c, .width = 8 , .shift = 0 },
.hiword_update = true ,
};
static const struct sdhci_arasan_soc_ctl_map intel_lgm_emmc_soc_ctl_map = {
.baseclkfreq = { .reg = 0 xa0, .width = 8 , .shift = 2 },
.clockmultiplier = { .reg = 0 , .width = -1 , .shift = -1 },
.hiword_update = false ,
};
static const struct sdhci_arasan_soc_ctl_map intel_lgm_sdxc_soc_ctl_map = {
.baseclkfreq = { .reg = 0 x80, .width = 8 , .shift = 2 },
.clockmultiplier = { .reg = 0 , .width = -1 , .shift = -1 },
.hiword_update = false ,
};
static const struct sdhci_arasan_soc_ctl_map intel_keembay_soc_ctl_map = {
.baseclkfreq = { .reg = 0 x0, .width = 8 , .shift = 14 },
.clockmultiplier = { .reg = 0 x4, .width = 8 , .shift = 14 },
.support64b = { .reg = 0 x4, .width = 1 , .shift = 24 },
.hiword_update = false ,
};
static void sdhci_arasan_phy_set_delaychain(struct sdhci_host *host, bool enable)
{
u32 reg;
reg = readl(host->ioaddr + PHY_CTRL_REG2);
if (enable)
reg |= (PHY_CTRL_SEL_DLY_TX_MASK | PHY_CTRL_SEL_DLY_RX_MASK);
else
reg &= ~(PHY_CTRL_SEL_DLY_TX_MASK | PHY_CTRL_SEL_DLY_RX_MASK);
writel(reg, host->ioaddr + PHY_CTRL_REG2);
}
static int sdhci_arasan_phy_set_dll(struct sdhci_host *host, bool enable)
{
u32 reg;
reg = readl(host->ioaddr + PHY_CTRL_REG2);
if (enable)
reg |= PHY_CTRL_EN_DLL_MASK;
else
reg &= ~PHY_CTRL_EN_DLL_MASK;
writel(reg, host->ioaddr + PHY_CTRL_REG2);
if (!enable)
return 0 ;
return readl_relaxed_poll_timeout(host->ioaddr + PHY_CTRL_REG2, reg,
(reg & PHY_CTRL_DLL_RDY_MASK), 10 ,
1000 * PHY_DLL_TIMEOUT_MS);
}
static void sdhci_arasan_phy_dll_set_freq(struct sdhci_host *host, int clock)
{
u32 reg, freq_sel, freq;
freq = DIV_ROUND_CLOSEST(clock, 1000000 );
if (freq <= 200 && freq > 170 )
freq_sel = FREQSEL_200M_170M;
else if (freq <= 170 && freq > 140 )
freq_sel = FREQSEL_170M_140M;
else if (freq <= 140 && freq > 110 )
freq_sel = FREQSEL_140M_110M;
else if (freq <= 110 && freq > 80 )
freq_sel = FREQSEL_110M_80M;
else
freq_sel = FREQSEL_80M_50M;
reg = readl(host->ioaddr + PHY_CTRL_REG2);
reg &= ~PHY_CTRL_FREQ_SEL_MASK;
reg |= (freq_sel << PHY_CTRL_FREQ_SEL_SHIFT);
writel(reg, host->ioaddr + PHY_CTRL_REG2);
}
/**
* sdhci_arasan_syscon_write - Write to a field in soc_ctl registers
*
* @ host : The sdhci_host
* @ fld : The field to write to
* @ val : The value to write
*
* This function allows writing to fields in sdhci_arasan_soc_ctl_map .
* Note that if a field is specified as not available ( shift < 0 ) then
* this function will silently return an error code . It will be noisy
* and print errors for any other ( unexpected ) errors .
*
* Return : 0 on success and error value on error
*/
static int sdhci_arasan_syscon_write(struct sdhci_host *host,
const struct sdhci_arasan_soc_ctl_field *fld,
u32 val)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
struct regmap *soc_ctl_base = sdhci_arasan->soc_ctl_base;
u32 reg = fld->reg;
u16 width = fld->width;
s16 shift = fld->shift;
int ret;
/*
* Silently return errors for shift < 0 so caller doesn ' t have
* to check for fields which are optional . For fields that
* are required then caller needs to do something special
* anyway .
*/
if (shift < 0 )
return -EINVAL;
if (sdhci_arasan->soc_ctl_map->hiword_update)
ret = regmap_write(soc_ctl_base, reg,
HIWORD_UPDATE(val, GENMASK(width, 0 ),
shift));
else
ret = regmap_update_bits(soc_ctl_base, reg,
GENMASK(shift + width, shift),
val << shift);
/* Yell about (unexpected) regmap errors */
if (ret)
pr_warn("%s: Regmap write fail: %d\n" ,
mmc_hostname(host->mmc), ret);
return ret;
}
static void sdhci_arasan_set_clock(struct sdhci_host *host, unsigned int clock)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
struct sdhci_arasan_clk_data *clk_data = &sdhci_arasan->clk_data;
bool ctrl_phy = false ;
if (!IS_ERR(sdhci_arasan->phy)) {
if (!sdhci_arasan->is_phy_on && clock <= PHY_CLK_TOO_SLOW_HZ) {
/*
* If PHY off , set clock to max speed and power PHY on .
*
* Although PHY docs apparently suggest power cycling
* when changing the clock the PHY doesn ' t like to be
* powered on while at low speeds like those used in ID
* mode . Even worse is powering the PHY on while the
* clock is off .
*
* To workaround the PHY limitations , the best we can
* do is to power it on at a faster speed and then slam
* through low speeds without power cycling .
*/
sdhci_set_clock(host, host->max_clk);
if (phy_power_on(sdhci_arasan->phy)) {
pr_err("%s: Cannot power on phy.\n" ,
mmc_hostname(host->mmc));
return ;
}
sdhci_arasan->is_phy_on = true ;
/*
* We ' ll now fall through to the below case with
* ctrl_phy = false ( so we won ' t turn off / on ) . The
* sdhci_set_clock ( ) will set the real clock .
*/
} else if (clock > PHY_CLK_TOO_SLOW_HZ) {
/*
* At higher clock speeds the PHY is fine being power
* cycled and docs say you _ should_ power cycle when
* changing clock speeds .
*/
ctrl_phy = true ;
}
}
if (ctrl_phy && sdhci_arasan->is_phy_on) {
phy_power_off(sdhci_arasan->phy);
sdhci_arasan->is_phy_on = false ;
}
if (sdhci_arasan->quirks & SDHCI_ARASAN_QUIRK_CLOCK_25_BROKEN) {
/*
* Some of the Arasan variations might not have timing
* requirements met at 25 MHz for Default Speed mode ,
* those controllers work at 19 MHz instead .
*/
if (clock == DEFAULT_SPEED_MAX_DTR)
clock = (DEFAULT_SPEED_MAX_DTR * 19 ) / 25 ;
}
/* Set the Input and Output Clock Phase Delays */
if (clk_data->set_clk_delays && clock > PHY_CLK_TOO_SLOW_HZ)
clk_data->set_clk_delays(host);
if (sdhci_arasan->internal_phy_reg && clock >= MIN_PHY_CLK_HZ) {
sdhci_writew(host, 0 , SDHCI_CLOCK_CONTROL);
sdhci_arasan_phy_set_dll(host, 0 );
sdhci_arasan_phy_set_delaychain(host, 0 );
sdhci_arasan_phy_dll_set_freq(host, clock);
} else if (sdhci_arasan->internal_phy_reg) {
sdhci_writew(host, 0 , SDHCI_CLOCK_CONTROL);
sdhci_arasan_phy_set_delaychain(host, 1 );
}
sdhci_set_clock(host, clock);
if (sdhci_arasan->internal_phy_reg && clock >= MIN_PHY_CLK_HZ)
sdhci_arasan_phy_set_dll(host, 1 );
if (sdhci_arasan->quirks & SDHCI_ARASAN_QUIRK_CLOCK_UNSTABLE)
/*
* Some controllers immediately report SDHCI_CLOCK_INT_STABLE
* after enabling the clock even though the clock is not
* stable . Trying to use a clock without waiting here results
* in EILSEQ while detecting some older / slower cards . The
* chosen delay is the maximum delay from sdhci_set_clock .
*/
msleep(20 );
if (ctrl_phy) {
if (phy_power_on(sdhci_arasan->phy)) {
pr_err("%s: Cannot power on phy.\n" ,
mmc_hostname(host->mmc));
return ;
}
sdhci_arasan->is_phy_on = true ;
}
}
static void sdhci_arasan_hs400_enhanced_strobe(struct mmc_host *mmc,
struct mmc_ios *ios)
{
u32 vendor;
struct sdhci_host *host = mmc_priv(mmc);
vendor = sdhci_readl(host, SDHCI_ARASAN_VENDOR_REGISTER);
if (ios->enhanced_strobe)
vendor |= VENDOR_ENHANCED_STROBE;
else
vendor &= ~VENDOR_ENHANCED_STROBE;
sdhci_writel(host, vendor, SDHCI_ARASAN_VENDOR_REGISTER);
}
static void sdhci_arasan_reset(struct sdhci_host *host, u8 mask)
{
u8 ctrl;
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
sdhci_and_cqhci_reset(host, mask);
if (sdhci_arasan->quirks & SDHCI_ARASAN_QUIRK_FORCE_CDTEST) {
ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
ctrl |= SDHCI_CTRL_CDTEST_INS | SDHCI_CTRL_CDTEST_EN;
sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
}
}
static void sdhci_arasan_hw_reset(struct sdhci_host *host)
{
u8 reg;
reg = sdhci_readb(host, SDHCI_POWER_CONTROL);
reg |= SDHCI_HW_RST_EN;
sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
/* As per eMMC spec, minimum 1us is required but give it 2us for good measure */
usleep_range(2 , 5 );
reg &= ~SDHCI_HW_RST_EN;
sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
/* As per eMMC spec, minimum 200us is required but give it 300us for good measure */
usleep_range(300 , 500 );
}
static int sdhci_arasan_voltage_switch(struct mmc_host *mmc,
struct mmc_ios *ios)
{
switch (ios->signal_voltage) {
case MMC_SIGNAL_VOLTAGE_180:
/*
* Plese don ' t switch to 1 V8 as arasan , 5 . 1 doesn ' t
* actually refer to this setting to indicate the
* signal voltage and the state machine will be broken
* actually if we force to enable 1 V8 . That ' s something
* like broken quirk but we could work around here .
*/
return 0 ;
case MMC_SIGNAL_VOLTAGE_330:
case MMC_SIGNAL_VOLTAGE_120:
/* We don't support 3V3 and 1V2 */
break ;
}
return -EINVAL;
}
static void sdhci_arasan_set_power_and_bus_voltage(struct sdhci_host *host, unsigned char mode,
unsigned short vdd)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
u32 reg;
/*
* Ensure that the card detect logic has stabilized before powering up , this is
* necessary after a host controller reset .
*/
if (mode == MMC_POWER_UP && sdhci_arasan->quirks & SDHCI_ARASAN_QUIRK_ENSURE_CD_STABLE)
read_poll_timeout(sdhci_readl, reg, reg & SDHCI_CD_STABLE, CD_STABLE_MAX_SLEEP_US,
CD_STABLE_TIMEOUT_US, false , host, SDHCI_PRESENT_STATE);
sdhci_set_power_and_bus_voltage(host, mode, vdd);
}
static const struct sdhci_ops sdhci_arasan_ops = {
.set_clock = sdhci_arasan_set_clock,
.get_max_clock = sdhci_pltfm_clk_get_max_clock,
.get_timeout_clock = sdhci_pltfm_clk_get_max_clock,
.set_bus_width = sdhci_set_bus_width,
.reset = sdhci_arasan_reset,
.set_uhs_signaling = sdhci_set_uhs_signaling,
.set_power = sdhci_arasan_set_power_and_bus_voltage,
.hw_reset = sdhci_arasan_hw_reset,
};
static u32 sdhci_arasan_cqhci_irq(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 sdhci_arasan_dumpregs(struct mmc_host *mmc)
{
sdhci_dumpregs(mmc_priv(mmc));
}
static void sdhci_arasan_cqe_enable(struct mmc_host *mmc)
{
struct sdhci_host *host = mmc_priv(mmc);
u32 reg;
reg = sdhci_readl(host, SDHCI_PRESENT_STATE);
while (reg & SDHCI_DATA_AVAILABLE) {
sdhci_readl(host, SDHCI_BUFFER);
reg = sdhci_readl(host, SDHCI_PRESENT_STATE);
}
sdhci_cqe_enable(mmc);
}
static const struct cqhci_host_ops sdhci_arasan_cqhci_ops = {
.enable = sdhci_arasan_cqe_enable,
.disable = sdhci_cqe_disable,
.dumpregs = sdhci_arasan_dumpregs,
};
static const struct sdhci_ops sdhci_arasan_cqe_ops = {
.set_clock = sdhci_arasan_set_clock,
.get_max_clock = sdhci_pltfm_clk_get_max_clock,
.get_timeout_clock = sdhci_pltfm_clk_get_max_clock,
.set_bus_width = sdhci_set_bus_width,
.reset = sdhci_arasan_reset,
.set_uhs_signaling = sdhci_set_uhs_signaling,
.set_power = sdhci_arasan_set_power_and_bus_voltage,
.irq = sdhci_arasan_cqhci_irq,
};
static const struct sdhci_pltfm_data sdhci_arasan_cqe_pdata = {
.ops = &sdhci_arasan_cqe_ops,
.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN,
};
#ifdef CONFIG_PM_SLEEP
/**
* sdhci_arasan_suspend - Suspend method for the driver
* @ dev : Address of the device structure
*
* Put the device in a low power state .
*
* Return : 0 on success and error value on error
*/
static int sdhci_arasan_suspend(struct device *dev)
{
struct sdhci_host *host = dev_get_drvdata(dev);
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
int ret;
if (host->tuning_mode != SDHCI_TUNING_MODE_3)
mmc_retune_needed(host->mmc);
if (sdhci_arasan->has_cqe) {
ret = cqhci_suspend(host->mmc);
if (ret)
return ret;
}
ret = sdhci_suspend_host(host);
if (ret)
return ret;
if (!IS_ERR(sdhci_arasan->phy) && sdhci_arasan->is_phy_on) {
ret = phy_power_off(sdhci_arasan->phy);
if (ret) {
dev_err(dev, "Cannot power off phy.\n" );
if (sdhci_resume_host(host))
dev_err(dev, "Cannot resume host.\n" );
return ret;
}
sdhci_arasan->is_phy_on = false ;
}
clk_disable(pltfm_host->clk);
clk_disable(sdhci_arasan->clk_ahb);
return 0 ;
}
/**
* sdhci_arasan_resume - Resume method for the driver
* @ dev : Address of the device structure
*
* Resume operation after suspend
*
* Return : 0 on success and error value on error
*/
static int sdhci_arasan_resume(struct device *dev)
{
struct sdhci_host *host = dev_get_drvdata(dev);
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
int ret;
ret = clk_enable(sdhci_arasan->clk_ahb);
if (ret) {
dev_err(dev, "Cannot enable AHB clock.\n" );
return ret;
}
ret = clk_enable(pltfm_host->clk);
if (ret) {
dev_err(dev, "Cannot enable SD clock.\n" );
return ret;
}
if (!IS_ERR(sdhci_arasan->phy) && host->mmc->actual_clock) {
ret = phy_power_on(sdhci_arasan->phy);
if (ret) {
dev_err(dev, "Cannot power on phy.\n" );
return ret;
}
sdhci_arasan->is_phy_on = true ;
}
ret = sdhci_resume_host(host);
if (ret) {
dev_err(dev, "Cannot resume host.\n" );
return ret;
}
if (sdhci_arasan->has_cqe)
return cqhci_resume(host->mmc);
return 0 ;
}
#endif /* ! CONFIG_PM_SLEEP */
static SIMPLE_DEV_PM_OPS(sdhci_arasan_dev_pm_ops, sdhci_arasan_suspend,
sdhci_arasan_resume);
/**
* sdhci_arasan_sdcardclk_recalc_rate - Return the card clock rate
*
* @ hw : Pointer to the hardware clock structure .
* @ parent_rate : The parent rate ( should be rate of clk_xin ) .
*
* Return the current actual rate of the SD card clock . This can be used
* to communicate with out PHY .
*
* Return : The card clock rate .
*/
static unsigned long sdhci_arasan_sdcardclk_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct sdhci_arasan_clk_data *clk_data =
container_of(hw, struct sdhci_arasan_clk_data, sdcardclk_hw);
struct sdhci_arasan_data *sdhci_arasan =
container_of(clk_data, struct sdhci_arasan_data, clk_data);
struct sdhci_host *host = sdhci_arasan->host;
return host->mmc->actual_clock;
}
static const struct clk_ops arasan_sdcardclk_ops = {
.recalc_rate = sdhci_arasan_sdcardclk_recalc_rate,
};
/**
* sdhci_arasan_sampleclk_recalc_rate - Return the sampling clock rate
*
* @ hw : Pointer to the hardware clock structure .
* @ parent_rate : The parent rate ( should be rate of clk_xin ) .
*
* Return the current actual rate of the sampling clock . This can be used
* to communicate with out PHY .
*
* Return : The sample clock rate .
*/
static unsigned long sdhci_arasan_sampleclk_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct sdhci_arasan_clk_data *clk_data =
container_of(hw, struct sdhci_arasan_clk_data, sampleclk_hw);
struct sdhci_arasan_data *sdhci_arasan =
container_of(clk_data, struct sdhci_arasan_data, clk_data);
struct sdhci_host *host = sdhci_arasan->host;
return host->mmc->actual_clock;
}
static const struct clk_ops arasan_sampleclk_ops = {
.recalc_rate = sdhci_arasan_sampleclk_recalc_rate,
};
/**
* sdhci_zynqmp_sdcardclk_set_phase - Set the SD Output Clock Tap Delays
*
* @ hw : Pointer to the hardware clock structure .
* @ degrees : The clock phase shift between 0 - 359 .
*
* Set the SD Output Clock Tap Delays for Output path
*
* Return : 0 on success and error value on error
*/
static int sdhci_zynqmp_sdcardclk_set_phase(struct clk_hw *hw, int degrees)
{
struct sdhci_arasan_clk_data *clk_data =
container_of(hw, struct sdhci_arasan_clk_data, sdcardclk_hw);
struct sdhci_arasan_data *sdhci_arasan =
container_of(clk_data, struct sdhci_arasan_data, clk_data);
struct sdhci_host *host = sdhci_arasan->host;
const char *clk_name = clk_hw_get_name(hw);
u32 node_id = !strcmp(clk_name, "clk_out_sd0" ) ? NODE_SD_0 : NODE_SD_1;
u8 tap_delay, tap_max = 0 ;
int ret;
/* This is applicable for SDHCI_SPEC_300 and above */
if (host->version < SDHCI_SPEC_300)
return 0 ;
switch (host->timing) {
case MMC_TIMING_MMC_HS:
case MMC_TIMING_SD_HS:
case MMC_TIMING_UHS_SDR25:
case MMC_TIMING_UHS_DDR50:
case MMC_TIMING_MMC_DDR52:
/* For 50MHz clock, 30 Taps are available */
tap_max = 30 ;
break ;
case MMC_TIMING_UHS_SDR50:
/* For 100MHz clock, 15 Taps are available */
tap_max = 15 ;
break ;
case MMC_TIMING_UHS_SDR104:
case MMC_TIMING_MMC_HS200:
/* For 200MHz clock, 8 Taps are available */
tap_max = 8 ;
break ;
default :
break ;
}
tap_delay = (degrees * tap_max) / 360 ;
/* Set the Clock Phase */
ret = zynqmp_pm_set_sd_tapdelay(node_id, PM_TAPDELAY_OUTPUT, tap_delay);
if (ret)
pr_err("Error setting Output Tap Delay\n" );
/* Release DLL Reset */
zynqmp_pm_sd_dll_reset(node_id, PM_DLL_RESET_RELEASE);
return ret;
}
static const struct clk_ops zynqmp_sdcardclk_ops = {
.recalc_rate = sdhci_arasan_sdcardclk_recalc_rate,
.set_phase = sdhci_zynqmp_sdcardclk_set_phase,
};
/**
* sdhci_zynqmp_sampleclk_set_phase - Set the SD Input Clock Tap Delays
*
* @ hw : Pointer to the hardware clock structure .
* @ degrees : The clock phase shift between 0 - 359 .
*
* Set the SD Input Clock Tap Delays for Input path
*
* Return : 0 on success and error value on error
*/
static int sdhci_zynqmp_sampleclk_set_phase(struct clk_hw *hw, int degrees)
{
struct sdhci_arasan_clk_data *clk_data =
container_of(hw, struct sdhci_arasan_clk_data, sampleclk_hw);
struct sdhci_arasan_data *sdhci_arasan =
container_of(clk_data, struct sdhci_arasan_data, clk_data);
struct sdhci_host *host = sdhci_arasan->host;
const char *clk_name = clk_hw_get_name(hw);
u32 node_id = !strcmp(clk_name, "clk_in_sd0" ) ? NODE_SD_0 : NODE_SD_1;
u8 tap_delay, tap_max = 0 ;
int ret;
/* This is applicable for SDHCI_SPEC_300 and above */
if (host->version < SDHCI_SPEC_300)
return 0 ;
/* Assert DLL Reset */
zynqmp_pm_sd_dll_reset(node_id, PM_DLL_RESET_ASSERT);
switch (host->timing) {
case MMC_TIMING_MMC_HS:
case MMC_TIMING_SD_HS:
case MMC_TIMING_UHS_SDR25:
case MMC_TIMING_UHS_DDR50:
case MMC_TIMING_MMC_DDR52:
/* For 50MHz clock, 120 Taps are available */
tap_max = 120 ;
break ;
case MMC_TIMING_UHS_SDR50:
/* For 100MHz clock, 60 Taps are available */
tap_max = 60 ;
break ;
case MMC_TIMING_UHS_SDR104:
case MMC_TIMING_MMC_HS200:
/* For 200MHz clock, 30 Taps are available */
tap_max = 30 ;
break ;
default :
break ;
}
tap_delay = (degrees * tap_max) / 360 ;
/* Set the Clock Phase */
ret = zynqmp_pm_set_sd_tapdelay(node_id, PM_TAPDELAY_INPUT, tap_delay);
if (ret)
pr_err("Error setting Input Tap Delay\n" );
return ret;
}
static const struct clk_ops zynqmp_sampleclk_ops = {
.recalc_rate = sdhci_arasan_sampleclk_recalc_rate,
.set_phase = sdhci_zynqmp_sampleclk_set_phase,
};
/**
* sdhci_versal_sdcardclk_set_phase - Set the SD Output Clock Tap Delays
*
* @ hw : Pointer to the hardware clock structure .
* @ degrees : The clock phase shift between 0 - 359 .
*
* Set the SD Output Clock Tap Delays for Output path
*
* Return : 0 on success and error value on error
*/
static int sdhci_versal_sdcardclk_set_phase(struct clk_hw *hw, int degrees)
{
struct sdhci_arasan_clk_data *clk_data =
container_of(hw, struct sdhci_arasan_clk_data, sdcardclk_hw);
struct sdhci_arasan_data *sdhci_arasan =
container_of(clk_data, struct sdhci_arasan_data, clk_data);
struct sdhci_host *host = sdhci_arasan->host;
u8 tap_delay, tap_max = 0 ;
/* This is applicable for SDHCI_SPEC_300 and above */
if (host->version < SDHCI_SPEC_300)
return 0 ;
switch (host->timing) {
case MMC_TIMING_MMC_HS:
case MMC_TIMING_SD_HS:
case MMC_TIMING_UHS_SDR25:
case MMC_TIMING_UHS_DDR50:
case MMC_TIMING_MMC_DDR52:
/* For 50MHz clock, 30 Taps are available */
tap_max = 30 ;
break ;
case MMC_TIMING_UHS_SDR50:
/* For 100MHz clock, 15 Taps are available */
tap_max = 15 ;
break ;
case MMC_TIMING_UHS_SDR104:
case MMC_TIMING_MMC_HS200:
/* For 200MHz clock, 8 Taps are available */
tap_max = 8 ;
break ;
default :
break ;
}
tap_delay = (degrees * tap_max) / 360 ;
/* Set the Clock Phase */
if (tap_delay) {
u32 regval;
regval = sdhci_readl(host, SDHCI_ARASAN_OTAPDLY_REGISTER);
regval |= SDHCI_OTAPDLY_ENABLE;
sdhci_writel(host, regval, SDHCI_ARASAN_OTAPDLY_REGISTER);
regval &= ~SDHCI_ARASAN_OTAPDLY_SEL_MASK;
regval |= tap_delay;
sdhci_writel(host, regval, SDHCI_ARASAN_OTAPDLY_REGISTER);
}
return 0 ;
}
static const struct clk_ops versal_sdcardclk_ops = {
.recalc_rate = sdhci_arasan_sdcardclk_recalc_rate,
.set_phase = sdhci_versal_sdcardclk_set_phase,
};
/**
* sdhci_versal_sampleclk_set_phase - Set the SD Input Clock Tap Delays
*
* @ hw : Pointer to the hardware clock structure .
* @ degrees : The clock phase shift between 0 - 359 .
*
* Set the SD Input Clock Tap Delays for Input path
*
* Return : 0 on success and error value on error
*/
static int sdhci_versal_sampleclk_set_phase(struct clk_hw *hw, int degrees)
{
struct sdhci_arasan_clk_data *clk_data =
container_of(hw, struct sdhci_arasan_clk_data, sampleclk_hw);
struct sdhci_arasan_data *sdhci_arasan =
container_of(clk_data, struct sdhci_arasan_data, clk_data);
struct sdhci_host *host = sdhci_arasan->host;
u8 tap_delay, tap_max = 0 ;
/* This is applicable for SDHCI_SPEC_300 and above */
if (host->version < SDHCI_SPEC_300)
return 0 ;
switch (host->timing) {
case MMC_TIMING_MMC_HS:
case MMC_TIMING_SD_HS:
case MMC_TIMING_UHS_SDR25:
case MMC_TIMING_UHS_DDR50:
case MMC_TIMING_MMC_DDR52:
/* For 50MHz clock, 120 Taps are available */
tap_max = 120 ;
break ;
case MMC_TIMING_UHS_SDR50:
/* For 100MHz clock, 60 Taps are available */
tap_max = 60 ;
break ;
case MMC_TIMING_UHS_SDR104:
case MMC_TIMING_MMC_HS200:
/* For 200MHz clock, 30 Taps are available */
tap_max = 30 ;
break ;
default :
break ;
}
tap_delay = (degrees * tap_max) / 360 ;
/* Set the Clock Phase */
if (tap_delay) {
u32 regval;
regval = sdhci_readl(host, SDHCI_ARASAN_ITAPDLY_REGISTER);
regval |= SDHCI_ITAPDLY_CHGWIN;
sdhci_writel(host, regval, SDHCI_ARASAN_ITAPDLY_REGISTER);
regval |= SDHCI_ITAPDLY_ENABLE;
sdhci_writel(host, regval, SDHCI_ARASAN_ITAPDLY_REGISTER);
regval &= ~SDHCI_ARASAN_ITAPDLY_SEL_MASK;
regval |= tap_delay;
sdhci_writel(host, regval, SDHCI_ARASAN_ITAPDLY_REGISTER);
regval &= ~SDHCI_ITAPDLY_CHGWIN;
sdhci_writel(host, regval, SDHCI_ARASAN_ITAPDLY_REGISTER);
}
return 0 ;
}
static const struct clk_ops versal_sampleclk_ops = {
.recalc_rate = sdhci_arasan_sampleclk_recalc_rate,
.set_phase = sdhci_versal_sampleclk_set_phase,
};
static int sdhci_versal_net_emmc_sdcardclk_set_phase(struct clk_hw *hw, int degrees)
{
struct sdhci_arasan_clk_data *clk_data =
container_of(hw, struct sdhci_arasan_clk_data, sdcardclk_hw);
struct sdhci_arasan_data *sdhci_arasan =
container_of(clk_data, struct sdhci_arasan_data, clk_data);
struct sdhci_host *host = sdhci_arasan->host;
u8 tap_delay, tap_max = 0 ;
switch (host->timing) {
case MMC_TIMING_MMC_HS:
case MMC_TIMING_MMC_DDR52:
tap_max = 16 ;
break ;
case MMC_TIMING_MMC_HS200:
case MMC_TIMING_MMC_HS400:
/* For 200MHz clock, 32 Taps are available */
tap_max = 32 ;
break ;
default :
break ;
}
tap_delay = (degrees * tap_max) / 360 ;
/* Set the Clock Phase */
if (tap_delay) {
u32 regval;
regval = sdhci_readl(host, PHY_CTRL_REG1);
regval |= PHY_CTRL_OTAPDLY_ENA_MASK;
sdhci_writel(host, regval, PHY_CTRL_REG1);
regval &= ~PHY_CTRL_OTAPDLY_SEL_MASK;
regval |= tap_delay << PHY_CTRL_OTAPDLY_SEL_SHIFT;
sdhci_writel(host, regval, PHY_CTRL_REG1);
}
return 0 ;
}
static const struct clk_ops versal_net_sdcardclk_ops = {
.recalc_rate = sdhci_arasan_sdcardclk_recalc_rate,
.set_phase = sdhci_versal_net_emmc_sdcardclk_set_phase,
};
static int sdhci_versal_net_emmc_sampleclk_set_phase(struct clk_hw *hw, int degrees)
{
struct sdhci_arasan_clk_data *clk_data =
container_of(hw, struct sdhci_arasan_clk_data, sampleclk_hw);
struct sdhci_arasan_data *sdhci_arasan =
container_of(clk_data, struct sdhci_arasan_data, clk_data);
struct sdhci_host *host = sdhci_arasan->host;
u8 tap_delay, tap_max = 0 ;
u32 regval;
switch (host->timing) {
case MMC_TIMING_MMC_HS:
case MMC_TIMING_MMC_DDR52:
tap_max = 32 ;
break ;
case MMC_TIMING_MMC_HS400:
/* Strobe select tap point for strb90 and strb180 */
regval = sdhci_readl(host, PHY_CTRL_REG1);
regval &= ~PHY_CTRL_STRB_SEL_MASK;
regval |= VERSAL_NET_PHY_CTRL_STRB90_STRB180_VAL << PHY_CTRL_STRB_SEL_SHIFT;
sdhci_writel(host, regval, PHY_CTRL_REG1);
break ;
default :
break ;
}
tap_delay = (degrees * tap_max) / 360 ;
/* Set the Clock Phase */
if (tap_delay) {
regval = sdhci_readl(host, PHY_CTRL_REG1);
regval |= PHY_CTRL_ITAP_CHG_WIN_MASK;
sdhci_writel(host, regval, PHY_CTRL_REG1);
regval |= PHY_CTRL_ITAPDLY_ENA_MASK;
sdhci_writel(host, regval, PHY_CTRL_REG1);
regval &= ~PHY_CTRL_ITAPDLY_SEL_MASK;
regval |= tap_delay << PHY_CTRL_ITAPDLY_SEL_SHIFT;
sdhci_writel(host, regval, PHY_CTRL_REG1);
regval &= ~PHY_CTRL_ITAP_CHG_WIN_MASK;
sdhci_writel(host, regval, PHY_CTRL_REG1);
}
return 0 ;
}
static const struct clk_ops versal_net_sampleclk_ops = {
.recalc_rate = sdhci_arasan_sampleclk_recalc_rate,
.set_phase = sdhci_versal_net_emmc_sampleclk_set_phase,
};
static void arasan_zynqmp_dll_reset(struct sdhci_host *host, u32 deviceid)
{
u16 clk;
clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
clk &= ~(SDHCI_CLOCK_CARD_EN | SDHCI_CLOCK_INT_EN);
sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
/* Issue DLL Reset */
zynqmp_pm_sd_dll_reset(deviceid, PM_DLL_RESET_PULSE);
clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
sdhci_enable_clk(host, clk);
}
static int arasan_zynqmp_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_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
struct clk_hw *hw = &sdhci_arasan->clk_data.sdcardclk_hw;
const char *clk_name = clk_hw_get_name(hw);
u32 device_id = !strcmp(clk_name, "clk_out_sd0" ) ? NODE_SD_0 :
NODE_SD_1;
int err;
/* ZynqMP SD controller does not perform auto tuning in DDR50 mode */
if (mmc->ios.timing == MMC_TIMING_UHS_DDR50)
return 0 ;
arasan_zynqmp_dll_reset(host, device_id);
err = sdhci_execute_tuning(mmc, opcode);
if (err)
return err;
arasan_zynqmp_dll_reset(host, device_id);
return 0 ;
}
/**
* sdhci_arasan_update_clockmultiplier - Set corecfg_clockmultiplier
*
* @ host : The sdhci_host
* @ value : The value to write
*
* The corecfg_clockmultiplier is supposed to contain clock multiplier
* value of programmable clock generator .
*
* NOTES :
* - Many existing devices don ' t seem to do this and work fine . To keep
* compatibility for old hardware where the device tree doesn ' t provide a
* register map , this function is a noop if a soc_ctl_map hasn ' t been provided
* for this platform .
* - The value of corecfg_clockmultiplier should sync with that of corresponding
* value reading from sdhci_capability_register . So this function is called
* once at probe time and never called again .
*/
static void sdhci_arasan_update_clockmultiplier(struct sdhci_host *host,
u32 value)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
const struct sdhci_arasan_soc_ctl_map *soc_ctl_map =
sdhci_arasan->soc_ctl_map;
/* Having a map is optional */
if (!soc_ctl_map)
return ;
/* If we have a map, we expect to have a syscon */
if (!sdhci_arasan->soc_ctl_base) {
pr_warn("%s: Have regmap, but no soc-ctl-syscon\n" ,
mmc_hostname(host->mmc));
return ;
}
sdhci_arasan_syscon_write(host, &soc_ctl_map->clockmultiplier, value);
}
/**
* sdhci_arasan_update_baseclkfreq - Set corecfg_baseclkfreq
*
* @ host : The sdhci_host
*
* The corecfg_baseclkfreq is supposed to contain the MHz of clk_xin . This
* function can be used to make that happen .
*
* NOTES :
* - Many existing devices don ' t seem to do this and work fine . To keep
* compatibility for old hardware where the device tree doesn ' t provide a
* register map , this function is a noop if a soc_ctl_map hasn ' t been provided
* for this platform .
* - It ' s assumed that clk_xin is not dynamic and that we use the SDHCI divider
* to achieve lower clock rates . That means that this function is called once
* at probe time and never called again .
*/
static void sdhci_arasan_update_baseclkfreq(struct sdhci_host *host)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
const struct sdhci_arasan_soc_ctl_map *soc_ctl_map =
sdhci_arasan->soc_ctl_map;
u32 mhz = DIV_ROUND_CLOSEST_ULL(clk_get_rate(pltfm_host->clk), 1000000 );
/* Having a map is optional */
if (!soc_ctl_map)
return ;
/* If we have a map, we expect to have a syscon */
if (!sdhci_arasan->soc_ctl_base) {
pr_warn("%s: Have regmap, but no soc-ctl-syscon\n" ,
mmc_hostname(host->mmc));
return ;
}
sdhci_arasan_syscon_write(host, &soc_ctl_map->baseclkfreq, mhz);
}
static void sdhci_arasan_set_clk_delays(struct sdhci_host *host)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
struct sdhci_arasan_clk_data *clk_data = &sdhci_arasan->clk_data;
clk_set_phase(clk_data->sampleclk,
clk_data->clk_phase_in[host->timing]);
clk_set_phase(clk_data->sdcardclk,
clk_data->clk_phase_out[host->timing]);
}
static void arasan_dt_read_clk_phase(struct device *dev,
struct sdhci_arasan_clk_data *clk_data,
unsigned int timing, const char *prop)
{
struct device_node *np = dev->of_node;
u32 clk_phase[2 ] = {0 };
int ret;
/*
* Read Tap Delay values from DT , if the DT does not contain the
* Tap Values then use the pre - defined values .
*/
ret = of_property_read_variable_u32_array(np, prop, &clk_phase[0 ],
2 , 0 );
if (ret < 0 ) {
dev_dbg(dev, "Using predefined clock phase for %s = %d %d\n" ,
prop, clk_data->clk_phase_in[timing],
clk_data->clk_phase_out[timing]);
return ;
}
/* The values read are Input and Output Clock Delays in order */
clk_data->clk_phase_in[timing] = clk_phase[0 ];
clk_data->clk_phase_out[timing] = clk_phase[1 ];
}
/**
* arasan_dt_parse_clk_phases - Read Clock Delay values from DT
*
* @ dev : Pointer to our struct device .
* @ clk_data : Pointer to the Clock Data structure
*
* Called at initialization to parse the values of Clock Delays .
*/
static void arasan_dt_parse_clk_phases(struct device *dev,
struct sdhci_arasan_clk_data *clk_data)
{
u32 mio_bank = 0 ;
int i;
/*
* This has been kept as a pointer and is assigned a function here .
* So that different controller variants can assign their own handling
* function .
*/
clk_data->set_clk_delays = sdhci_arasan_set_clk_delays;
if (of_device_is_compatible(dev->of_node, "xlnx,zynqmp-8.9a" )) {
u32 zynqmp_iclk_phase[MMC_TIMING_MMC_HS400 + 1 ] =
ZYNQMP_ICLK_PHASE;
u32 zynqmp_oclk_phase[MMC_TIMING_MMC_HS400 + 1 ] =
ZYNQMP_OCLK_PHASE;
of_property_read_u32(dev->of_node, "xlnx,mio-bank" , &mio_bank);
if (mio_bank == 2 ) {
zynqmp_oclk_phase[MMC_TIMING_UHS_SDR104] = 90 ;
zynqmp_oclk_phase[MMC_TIMING_MMC_HS200] = 90 ;
}
for (i = 0 ; i <= MMC_TIMING_MMC_HS400; i++) {
clk_data->clk_phase_in[i] = zynqmp_iclk_phase[i];
clk_data->clk_phase_out[i] = zynqmp_oclk_phase[i];
}
}
if (of_device_is_compatible(dev->of_node, "xlnx,versal-8.9a" )) {
u32 versal_iclk_phase[MMC_TIMING_MMC_HS400 + 1 ] =
VERSAL_ICLK_PHASE;
u32 versal_oclk_phase[MMC_TIMING_MMC_HS400 + 1 ] =
VERSAL_OCLK_PHASE;
for (i = 0 ; i <= MMC_TIMING_MMC_HS400; i++) {
clk_data->clk_phase_in[i] = versal_iclk_phase[i];
clk_data->clk_phase_out[i] = versal_oclk_phase[i];
}
}
if (of_device_is_compatible(dev->of_node, "xlnx,versal-net-emmc" )) {
u32 versal_net_iclk_phase[MMC_TIMING_MMC_HS400 + 1 ] =
VERSAL_NET_EMMC_ICLK_PHASE;
u32 versal_net_oclk_phase[MMC_TIMING_MMC_HS400 + 1 ] =
VERSAL_NET_EMMC_OCLK_PHASE;
for (i = 0 ; i <= MMC_TIMING_MMC_HS400; i++) {
clk_data->clk_phase_in[i] = versal_net_iclk_phase[i];
clk_data->clk_phase_out[i] = versal_net_oclk_phase[i];
}
}
arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_LEGACY,
"clk-phase-legacy" );
arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_MMC_HS,
"clk-phase-mmc-hs" );
arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_SD_HS,
"clk-phase-sd-hs" );
arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_UHS_SDR12,
"clk-phase-uhs-sdr12" );
arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_UHS_SDR25,
"clk-phase-uhs-sdr25" );
arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_UHS_SDR50,
"clk-phase-uhs-sdr50" );
arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_UHS_SDR104,
"clk-phase-uhs-sdr104" );
arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_UHS_DDR50,
"clk-phase-uhs-ddr50" );
arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_MMC_DDR52,
"clk-phase-mmc-ddr52" );
arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_MMC_HS200,
"clk-phase-mmc-hs200" );
arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_MMC_HS400,
"clk-phase-mmc-hs400" );
}
static const struct sdhci_pltfm_data sdhci_arasan_pdata = {
.ops = &sdhci_arasan_ops,
.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN |
SDHCI_QUIRK2_STOP_WITH_TC,
};
static const struct sdhci_arasan_clk_ops arasan_clk_ops = {
.sdcardclk_ops = &arasan_sdcardclk_ops,
.sampleclk_ops = &arasan_sampleclk_ops,
};
static struct sdhci_arasan_of_data sdhci_arasan_generic_data = {
.pdata = &sdhci_arasan_pdata,
.clk_ops = &arasan_clk_ops,
};
static const struct sdhci_pltfm_data sdhci_keembay_emmc_pdata = {
.ops = &sdhci_arasan_cqe_ops,
.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN |
SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
SDHCI_QUIRK_NO_LED |
SDHCI_QUIRK_32BIT_DMA_ADDR |
SDHCI_QUIRK_32BIT_DMA_SIZE |
SDHCI_QUIRK_32BIT_ADMA_SIZE,
.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN |
SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400 |
SDHCI_QUIRK2_STOP_WITH_TC |
SDHCI_QUIRK2_BROKEN_64_BIT_DMA,
};
static const struct sdhci_pltfm_data sdhci_keembay_sd_pdata = {
.ops = &sdhci_arasan_ops,
.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN |
SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
SDHCI_QUIRK_NO_LED |
SDHCI_QUIRK_32BIT_DMA_ADDR |
SDHCI_QUIRK_32BIT_DMA_SIZE |
SDHCI_QUIRK_32BIT_ADMA_SIZE,
.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN |
SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON |
SDHCI_QUIRK2_STOP_WITH_TC |
SDHCI_QUIRK2_BROKEN_64_BIT_DMA,
};
static const struct sdhci_pltfm_data sdhci_keembay_sdio_pdata = {
.ops = &sdhci_arasan_ops,
.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN |
SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
SDHCI_QUIRK_NO_LED |
SDHCI_QUIRK_32BIT_DMA_ADDR |
SDHCI_QUIRK_32BIT_DMA_SIZE |
SDHCI_QUIRK_32BIT_ADMA_SIZE,
.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN |
SDHCI_QUIRK2_HOST_OFF_CARD_ON |
SDHCI_QUIRK2_BROKEN_64_BIT_DMA,
};
static struct sdhci_arasan_of_data sdhci_arasan_rk3399_data = {
.soc_ctl_map = &rk3399_soc_ctl_map,
.pdata = &sdhci_arasan_cqe_pdata,
.clk_ops = &arasan_clk_ops,
};
static struct sdhci_arasan_of_data intel_lgm_emmc_data = {
.soc_ctl_map = &intel_lgm_emmc_soc_ctl_map,
.pdata = &sdhci_arasan_cqe_pdata,
.clk_ops = &arasan_clk_ops,
};
static struct sdhci_arasan_of_data intel_lgm_sdxc_data = {
.soc_ctl_map = &intel_lgm_sdxc_soc_ctl_map,
.pdata = &sdhci_arasan_cqe_pdata,
.clk_ops = &arasan_clk_ops,
};
static const struct sdhci_pltfm_data sdhci_arasan_zynqmp_pdata = {
.ops = &sdhci_arasan_ops,
.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN |
SDHCI_QUIRK2_STOP_WITH_TC,
};
static const struct sdhci_pltfm_data sdhci_arasan_versal_net_pdata = {
.ops = &sdhci_arasan_ops,
.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN |
SDHCI_QUIRK2_STOP_WITH_TC |
SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400,
};
static const struct sdhci_arasan_clk_ops zynqmp_clk_ops = {
.sdcardclk_ops = &zynqmp_sdcardclk_ops,
.sampleclk_ops = &zynqmp_sampleclk_ops,
};
static struct sdhci_arasan_of_data sdhci_arasan_zynqmp_data = {
.pdata = &sdhci_arasan_zynqmp_pdata,
.clk_ops = &zynqmp_clk_ops,
.quirks = SDHCI_ARASAN_QUIRK_ENSURE_CD_STABLE,
};
static const struct sdhci_arasan_clk_ops versal_clk_ops = {
.sdcardclk_ops = &versal_sdcardclk_ops,
.sampleclk_ops = &versal_sampleclk_ops,
};
static struct sdhci_arasan_of_data sdhci_arasan_versal_data = {
.pdata = &sdhci_arasan_zynqmp_pdata,
.clk_ops = &versal_clk_ops,
.quirks = SDHCI_ARASAN_QUIRK_ENSURE_CD_STABLE,
};
static const struct sdhci_arasan_clk_ops versal_net_clk_ops = {
.sdcardclk_ops = &versal_net_sdcardclk_ops,
.sampleclk_ops = &versal_net_sampleclk_ops,
};
static struct sdhci_arasan_of_data sdhci_arasan_versal_net_data = {
.pdata = &sdhci_arasan_versal_net_pdata,
.clk_ops = &versal_net_clk_ops,
.quirks = SDHCI_ARASAN_QUIRK_ENSURE_CD_STABLE,
};
static struct sdhci_arasan_of_data intel_keembay_emmc_data = {
.soc_ctl_map = &intel_keembay_soc_ctl_map,
.pdata = &sdhci_keembay_emmc_pdata,
.clk_ops = &arasan_clk_ops,
};
static struct sdhci_arasan_of_data intel_keembay_sd_data = {
.soc_ctl_map = &intel_keembay_soc_ctl_map,
.pdata = &sdhci_keembay_sd_pdata,
.clk_ops = &arasan_clk_ops,
};
static struct sdhci_arasan_of_data intel_keembay_sdio_data = {
.soc_ctl_map = &intel_keembay_soc_ctl_map,
.pdata = &sdhci_keembay_sdio_pdata,
.clk_ops = &arasan_clk_ops,
};
static const struct of_device_id sdhci_arasan_of_match[] = {
/* SoC-specific compatible strings w/ soc_ctl_map */
{
.compatible = "rockchip,rk3399-sdhci-5.1" ,
.data = &sdhci_arasan_rk3399_data,
},
{
.compatible = "intel,lgm-sdhci-5.1-emmc" ,
.data = &intel_lgm_emmc_data,
},
{
.compatible = "intel,lgm-sdhci-5.1-sdxc" ,
.data = &intel_lgm_sdxc_data,
},
{
.compatible = "intel,keembay-sdhci-5.1-emmc" ,
.data = &intel_keembay_emmc_data,
},
{
.compatible = "intel,keembay-sdhci-5.1-sd" ,
.data = &intel_keembay_sd_data,
},
{
.compatible = "intel,keembay-sdhci-5.1-sdio" ,
.data = &intel_keembay_sdio_data,
},
/* Generic compatible below here */
{
.compatible = "arasan,sdhci-8.9a" ,
.data = &sdhci_arasan_generic_data,
},
{
.compatible = "arasan,sdhci-5.1" ,
.data = &sdhci_arasan_generic_data,
},
{
.compatible = "arasan,sdhci-4.9a" ,
.data = &sdhci_arasan_generic_data,
},
{
.compatible = "xlnx,zynqmp-8.9a" ,
.data = &sdhci_arasan_zynqmp_data,
},
{
.compatible = "xlnx,versal-8.9a" ,
.data = &sdhci_arasan_versal_data,
},
{
.compatible = "xlnx,versal-net-emmc" ,
.data = &sdhci_arasan_versal_net_data,
},
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, sdhci_arasan_of_match);
/**
* sdhci_arasan_register_sdcardclk - Register the sdcardclk for a PHY to use
*
* @ sdhci_arasan : Our private data structure .
* @ clk_xin : Pointer to the functional clock
* @ dev : Pointer to our struct device .
*
* Some PHY devices need to know what the actual card clock is . In order for
* them to find out , we ' ll provide a clock through the common clock framework
* for them to query .
*
* Return : 0 on success and error value on error
*/
static int
sdhci_arasan_register_sdcardclk(struct sdhci_arasan_data *sdhci_arasan,
struct clk *clk_xin,
struct device *dev)
{
struct sdhci_arasan_clk_data *clk_data = &sdhci_arasan->clk_data;
struct device_node *np = dev->of_node;
struct clk_init_data sdcardclk_init;
const char *parent_clk_name;
int ret;
ret = of_property_read_string_index(np, "clock-output-names" , 0 ,
&sdcardclk_init.name);
if (ret) {
dev_err(dev, "DT has #clock-cells but no clock-output-names\n" );
return ret;
}
parent_clk_name = __clk_get_name(clk_xin);
sdcardclk_init.parent_names = &parent_clk_name;
sdcardclk_init.num_parents = 1 ;
sdcardclk_init.flags = CLK_GET_RATE_NOCACHE;
sdcardclk_init.ops = sdhci_arasan->clk_ops->sdcardclk_ops;
clk_data->sdcardclk_hw.init = &sdcardclk_init;
clk_data->sdcardclk =
devm_clk_register(dev, &clk_data->sdcardclk_hw);
if (IS_ERR(clk_data->sdcardclk))
return PTR_ERR(clk_data->sdcardclk);
clk_data->sdcardclk_hw.init = NULL;
ret = of_clk_add_provider(np, of_clk_src_simple_get,
clk_data->sdcardclk);
if (ret)
dev_err(dev, "Failed to add sdcard clock provider\n" );
return ret;
}
/**
* sdhci_arasan_register_sampleclk - Register the sampleclk for a PHY to use
*
* @ sdhci_arasan : Our private data structure .
* @ clk_xin : Pointer to the functional clock
* @ dev : Pointer to our struct device .
*
* Some PHY devices need to know what the actual card clock is . In order for
* them to find out , we ' ll provide a clock through the common clock framework
* for them to query .
*
* Return : 0 on success and error value on error
*/
static int
sdhci_arasan_register_sampleclk(struct sdhci_arasan_data *sdhci_arasan,
struct clk *clk_xin,
struct device *dev)
{
struct sdhci_arasan_clk_data *clk_data = &sdhci_arasan->clk_data;
struct device_node *np = dev->of_node;
struct clk_init_data sampleclk_init;
const char *parent_clk_name;
int ret;
ret = of_property_read_string_index(np, "clock-output-names" , 1 ,
&sampleclk_init.name);
if (ret) {
dev_err(dev, "DT has #clock-cells but no clock-output-names\n" );
return ret;
}
parent_clk_name = __clk_get_name(clk_xin);
sampleclk_init.parent_names = &parent_clk_name;
sampleclk_init.num_parents = 1 ;
sampleclk_init.flags = CLK_GET_RATE_NOCACHE;
sampleclk_init.ops = sdhci_arasan->clk_ops->sampleclk_ops;
clk_data->sampleclk_hw.init = &sampleclk_init;
clk_data->sampleclk =
devm_clk_register(dev, &clk_data->sampleclk_hw);
if (IS_ERR(clk_data->sampleclk))
return PTR_ERR(clk_data->sampleclk);
clk_data->sampleclk_hw.init = NULL;
ret = of_clk_add_provider(np, of_clk_src_simple_get,
clk_data->sampleclk);
if (ret)
dev_err(dev, "Failed to add sample clock provider\n" );
return ret;
}
/**
* sdhci_arasan_unregister_sdclk - Undoes sdhci_arasan_register_sdclk ( )
*
* @ dev : Pointer to our struct device .
*
* Should be called any time we ' re exiting and sdhci_arasan_register_sdclk ( )
* returned success .
*/
static void sdhci_arasan_unregister_sdclk(struct device *dev)
{
struct device_node *np = dev->of_node;
if (!of_property_present(np, "#clock-cells" ))
return ;
of_clk_del_provider(dev->of_node);
}
/**
* sdhci_arasan_update_support64b - Set SUPPORT_64B ( 64 - bit System Bus Support )
* @ host : The sdhci_host
* @ value : The value to write
*
* This should be set based on the System Address Bus .
* 0 : the Core supports only 32 - bit System Address Bus .
* 1 : the Core supports 64 - bit System Address Bus .
*
* NOTE :
* For Keem Bay , it is required to clear this bit . Its default value is 1 ' b1 .
* Keem Bay does not support 64 - bit access .
*/
static void sdhci_arasan_update_support64b(struct sdhci_host *host, u32 value)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
const struct sdhci_arasan_soc_ctl_map *soc_ctl_map;
/* Having a map is optional */
soc_ctl_map = sdhci_arasan->soc_ctl_map;
if (!soc_ctl_map)
return ;
/* If we have a map, we expect to have a syscon */
if (!sdhci_arasan->soc_ctl_base) {
pr_warn("%s: Have regmap, but no soc-ctl-syscon\n" ,
mmc_hostname(host->mmc));
return ;
}
sdhci_arasan_syscon_write(host, &soc_ctl_map->support64b, value);
}
/**
* sdhci_arasan_register_sdclk - Register the sdcardclk for a PHY to use
*
* @ sdhci_arasan : Our private data structure .
* @ clk_xin : Pointer to the functional clock
* @ dev : Pointer to our struct device .
*
* Some PHY devices need to know what the actual card clock is . In order for
* them to find out , we ' ll provide a clock through the common clock framework
* for them to query .
*
* Note : without seriously re - architecting SDHCI ' s clock code and testing on
* all platforms , there ' s no way to create a totally beautiful clock here
* with all clock ops implemented . Instead , we ' ll just create a clock that can
* be queried and set the CLK_GET_RATE_NOCACHE attribute to tell common clock
* framework that we ' re doing things behind its back . This should be sufficient
* to create nice clean device tree bindings and later ( if needed ) we can try
* re - architecting SDHCI if we see some benefit to it .
*
* Return : 0 on success and error value on error
*/
static int sdhci_arasan_register_sdclk(struct sdhci_arasan_data *sdhci_arasan,
struct clk *clk_xin,
struct device *dev)
{
struct device_node *np = dev->of_node;
u32 num_clks = 0 ;
int ret;
/* Providing a clock to the PHY is optional; no error if missing */
if (of_property_read_u32(np, "#clock-cells" , &num_clks) < 0 )
return 0 ;
ret = sdhci_arasan_register_sdcardclk(sdhci_arasan, clk_xin, dev);
if (ret)
return ret;
if (num_clks) {
ret = sdhci_arasan_register_sampleclk(sdhci_arasan, clk_xin,
dev);
if (ret) {
sdhci_arasan_unregister_sdclk(dev);
return ret;
}
}
return 0 ;
}
static int sdhci_zynqmp_set_dynamic_config(struct device *dev,
struct sdhci_arasan_data *sdhci_arasan)
{
struct sdhci_host *host = sdhci_arasan->host;
struct clk_hw *hw = &sdhci_arasan->clk_data.sdcardclk_hw;
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
const char *clk_name = clk_hw_get_name(hw);
u32 mhz, node_id = !strcmp(clk_name, "clk_out_sd0" ) ? NODE_SD_0 : NODE_SD_1;
struct reset_control *rstc;
int ret;
/* Obtain SDHC reset control */
rstc = devm_reset_control_get_optional_exclusive(dev, NULL);
if (IS_ERR(rstc)) {
dev_err(dev, "Cannot get SDHC reset.\n" );
return PTR_ERR(rstc);
}
ret = reset_control_assert(rstc);
if (ret)
return ret;
ret = zynqmp_pm_set_sd_config(node_id, SD_CONFIG_FIXED, 0 );
if (ret)
return ret;
ret = zynqmp_pm_set_sd_config(node_id, SD_CONFIG_EMMC_SEL,
!!(host->mmc->caps & MMC_CAP_NONREMOVABLE));
if (ret)
return ret;
mhz = DIV_ROUND_CLOSEST_ULL(clk_get_rate(pltfm_host->clk), 1000000 );
if (mhz > 100 && mhz <= 200 )
mhz = 200 ;
else if (mhz > 50 && mhz <= 100 )
mhz = 100 ;
else if (mhz > 25 && mhz <= 50 )
mhz = 50 ;
else
mhz = 25 ;
ret = zynqmp_pm_set_sd_config(node_id, SD_CONFIG_BASECLK, mhz);
if (ret)
return ret;
ret = zynqmp_pm_set_sd_config(node_id, SD_CONFIG_8BIT,
!!(host->mmc->caps & MMC_CAP_8_BIT_DATA));
if (ret)
return ret;
ret = reset_control_deassert(rstc);
if (ret)
return ret;
usleep_range(1000 , 1500 );
return 0 ;
}
static int sdhci_arasan_add_host(struct sdhci_arasan_data *sdhci_arasan)
{
struct sdhci_host *host = sdhci_arasan->host;
struct cqhci_host *cq_host;
bool dma64;
int ret;
if (!sdhci_arasan->has_cqe)
return sdhci_add_host(host);
ret = sdhci_setup_host(host);
if (ret)
return ret;
cq_host = devm_kzalloc(host->mmc->parent,
sizeof (*cq_host), GFP_KERNEL);
if (!cq_host) {
ret = -ENOMEM;
goto cleanup;
}
cq_host->mmio = host->ioaddr + SDHCI_ARASAN_CQE_BASE_ADDR;
cq_host->ops = &sdhci_arasan_cqhci_ops;
dma64 = host->flags & SDHCI_USE_64_BIT_DMA;
if (dma64)
cq_host->caps |= CQHCI_TASK_DESC_SZ_128;
ret = cqhci_init(cq_host, host->mmc, dma64);
if (ret)
goto cleanup;
ret = __sdhci_add_host(host);
if (ret)
goto cleanup;
return 0 ;
cleanup:
sdhci_cleanup_host(host);
return ret;
}
static int sdhci_arasan_probe(struct platform_device *pdev)
{
int ret;
struct device_node *node;
struct clk *clk_xin;
struct clk *clk_dll;
struct sdhci_host *host;
struct sdhci_pltfm_host *pltfm_host;
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct sdhci_arasan_data *sdhci_arasan;
const struct sdhci_arasan_of_data *data;
data = of_device_get_match_data(dev);
if (!data)
return -EINVAL;
host = sdhci_pltfm_init(pdev, data->pdata, sizeof (*sdhci_arasan));
if (IS_ERR(host))
return PTR_ERR(host);
pltfm_host = sdhci_priv(host);
sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
sdhci_arasan->host = host;
sdhci_arasan->soc_ctl_map = data->soc_ctl_map;
sdhci_arasan->clk_ops = data->clk_ops;
node = of_parse_phandle(np, "arasan,soc-ctl-syscon" , 0 );
if (node) {
sdhci_arasan->soc_ctl_base = syscon_node_to_regmap(node);
of_node_put(node);
if (IS_ERR(sdhci_arasan->soc_ctl_base))
return dev_err_probe(dev,
PTR_ERR(sdhci_arasan->soc_ctl_base),
"Can't get syscon\n" );
}
sdhci_get_of_property(pdev);
sdhci_arasan->clk_ahb = devm_clk_get(dev, "clk_ahb" );
if (IS_ERR(sdhci_arasan->clk_ahb))
return dev_err_probe(dev, PTR_ERR(sdhci_arasan->clk_ahb),
"clk_ahb clock not found.\n" );
clk_xin = devm_clk_get(dev, "clk_xin" );
if (IS_ERR(clk_xin))
return dev_err_probe(dev, PTR_ERR(clk_xin), "clk_xin clock not found.\n" );
ret = clk_prepare_enable(sdhci_arasan->clk_ahb);
if (ret)
return dev_err_probe(dev, ret, "Unable to enable AHB clock.\n" );
/* If clock-frequency property is set, use the provided value */
if (pltfm_host->clock &&
pltfm_host->clock != clk_get_rate(clk_xin)) {
ret = clk_set_rate(clk_xin, pltfm_host->clock);
if (ret) {
dev_err(&pdev->dev, "Failed to set SD clock rate\n" );
goto clk_dis_ahb;
}
}
ret = clk_prepare_enable(clk_xin);
if (ret) {
dev_err(dev, "Unable to enable SD clock.\n" );
goto clk_dis_ahb;
}
clk_dll = devm_clk_get_optional_enabled(dev, "gate" );
if (IS_ERR(clk_dll)) {
ret = dev_err_probe(dev, PTR_ERR(clk_dll), "failed to get dll clk\n" );
goto clk_disable_all;
}
if (of_property_read_bool(np, "xlnx,fails-without-test-cd" ))
sdhci_arasan->quirks |= SDHCI_ARASAN_QUIRK_FORCE_CDTEST;
if (of_property_read_bool(np, "xlnx,int-clock-stable-broken" ))
sdhci_arasan->quirks |= SDHCI_ARASAN_QUIRK_CLOCK_UNSTABLE;
pltfm_host->clk = clk_xin;
if (of_device_is_compatible(np, "rockchip,rk3399-sdhci-5.1" ))
sdhci_arasan_update_clockmultiplier(host, 0 x0);
sdhci_arasan->quirks |= data->quirks;
if (of_device_is_compatible(np, "intel,keembay-sdhci-5.1-emmc" ) ||
of_device_is_compatible(np, "intel,keembay-sdhci-5.1-sd" ) ||
of_device_is_compatible(np, "intel,keembay-sdhci-5.1-sdio" )) {
sdhci_arasan_update_clockmultiplier(host, 0 x0);
sdhci_arasan_update_support64b(host, 0 x0);
host->mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY;
}
sdhci_arasan_update_baseclkfreq(host);
ret = sdhci_arasan_register_sdclk(sdhci_arasan, clk_xin, dev);
if (ret)
goto clk_disable_all;
if (of_device_is_compatible(np, "xlnx,zynqmp-8.9a" )) {
host->mmc_host_ops.execute_tuning =
arasan_zynqmp_execute_tuning;
sdhci_arasan->quirks |= SDHCI_ARASAN_QUIRK_CLOCK_25_BROKEN;
host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12;
}
arasan_dt_parse_clk_phases(dev, &sdhci_arasan->clk_data);
ret = mmc_of_parse(host->mmc);
if (ret) {
ret = dev_err_probe(dev, ret, "parsing dt failed.\n" );
goto unreg_clk;
}
if (of_device_is_compatible(np, "xlnx,zynqmp-8.9a" )) {
ret = zynqmp_pm_is_function_supported(PM_IOCTL, IOCTL_SET_SD_CONFIG);
if (!ret) {
ret = sdhci_zynqmp_set_dynamic_config(dev, sdhci_arasan);
if (ret)
goto unreg_clk;
}
}
sdhci_arasan->phy = ERR_PTR(-ENODEV);
if (of_device_is_compatible(np, "arasan,sdhci-5.1" )) {
sdhci_arasan->phy = devm_phy_get(dev, "phy_arasan" );
if (IS_ERR(sdhci_arasan->phy)) {
ret = dev_err_probe(dev, PTR_ERR(sdhci_arasan->phy),
"No phy for arasan,sdhci-5.1.\n" );
goto unreg_clk;
}
ret = phy_init(sdhci_arasan->phy);
if (ret < 0 ) {
dev_err(dev, "phy_init err.\n" );
goto unreg_clk;
}
host->mmc_host_ops.hs400_enhanced_strobe =
sdhci_arasan_hs400_enhanced_strobe;
host->mmc_host_ops.start_signal_voltage_switch =
sdhci_arasan_voltage_switch;
sdhci_arasan->has_cqe = true ;
host->mmc->caps2 |= MMC_CAP2_CQE;
if (!of_property_read_bool(np, "disable-cqe-dcmd" ))
host->mmc->caps2 |= MMC_CAP2_CQE_DCMD;
}
if (of_device_is_compatible(np, "xlnx,versal-net-emmc" ))
sdhci_arasan->internal_phy_reg = true ;
ret = sdhci_arasan_add_host(sdhci_arasan);
if (ret)
goto err_add_host;
return 0 ;
err_add_host:
if (!IS_ERR(sdhci_arasan->phy))
phy_exit(sdhci_arasan->phy);
unreg_clk:
sdhci_arasan_unregister_sdclk(dev);
clk_disable_all:
clk_disable_unprepare(clk_xin);
clk_dis_ahb:
clk_disable_unprepare(sdhci_arasan->clk_ahb);
return ret;
}
static void sdhci_arasan_remove(struct platform_device *pdev)
{
struct sdhci_host *host = platform_get_drvdata(pdev);
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
struct clk *clk_ahb = sdhci_arasan->clk_ahb;
struct clk *clk_xin = pltfm_host->clk;
if (!IS_ERR(sdhci_arasan->phy)) {
if (sdhci_arasan->is_phy_on)
phy_power_off(sdhci_arasan->phy);
phy_exit(sdhci_arasan->phy);
}
sdhci_arasan_unregister_sdclk(&pdev->dev);
sdhci_pltfm_remove(pdev);
clk_disable_unprepare(clk_xin);
clk_disable_unprepare(clk_ahb);
}
static struct platform_driver sdhci_arasan_driver = {
.driver = {
.name = "sdhci-arasan" ,
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
.of_match_table = sdhci_arasan_of_match,
.pm = &sdhci_arasan_dev_pm_ops,
},
.probe = sdhci_arasan_probe,
.remove = sdhci_arasan_remove,
};
module_platform_driver(sdhci_arasan_driver);
MODULE_DESCRIPTION("Driver for the Arasan SDHCI Controller" );
MODULE_AUTHOR("Soeren Brinkmann <soren.brinkmann@xilinx.com>" );
MODULE_LICENSE("GPL" );
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