// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright ( c ) 2013 - 2016 , Linux Foundation . All rights reserved .
*/
#include <linux/acpi.h>
#include <linux/clk.h>
#include <linux/cleanup.h>
#include <linux/delay.h>
#include <linux/devfreq.h>
#include <linux/gpio/consumer.h>
#include <linux/interconnect.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/reset-controller.h>
#include <linux/time.h>
#include <linux/unaligned.h>
#include <linux/units.h>
#include <soc/qcom/ice.h>
#include <ufs/ufshcd.h>
#include <ufs/ufshci.h>
#include <ufs/ufs_quirks.h>
#include <ufs/unipro.h>
#include "ufshcd-pltfrm.h"
#include "ufs-qcom.h"
#define MCQ_QCFGPTR_MASK GENMASK(7 , 0 )
#define MCQ_QCFGPTR_UNIT 0 x200
#define MCQ_SQATTR_OFFSET(c) \
((((c) >> 16 ) & MCQ_QCFGPTR_MASK) * MCQ_QCFGPTR_UNIT)
#define MCQ_QCFG_SIZE 0 x40
/* De-emphasis for gear-5 */
#define DEEMPHASIS_3_5_dB 0 x04
#define NO_DEEMPHASIS 0 x0
#define UFS_ICE_SYNC_RST_SEL BIT(3 )
#define UFS_ICE_SYNC_RST_SW BIT(4 )
enum {
TSTBUS_UAWM,
TSTBUS_UARM,
TSTBUS_TXUC,
TSTBUS_RXUC,
TSTBUS_DFC,
TSTBUS_TRLUT,
TSTBUS_TMRLUT,
TSTBUS_OCSC,
TSTBUS_UTP_HCI,
TSTBUS_COMBINED,
TSTBUS_WRAPPER,
TSTBUS_UNIPRO,
TSTBUS_MAX,
};
#define QCOM_UFS_MAX_GEAR 5
#define QCOM_UFS_MAX_LANE 2
enum {
MODE_MIN,
MODE_PWM,
MODE_HS_RA,
MODE_HS_RB,
MODE_MAX,
};
static const struct __ufs_qcom_bw_table {
u32 mem_bw;
u32 cfg_bw;
} ufs_qcom_bw_table[MODE_MAX + 1 ][QCOM_UFS_MAX_GEAR + 1 ][QCOM_UFS_MAX_LANE + 1 ] = {
[MODE_MIN][0 ][0 ] = { 0 , 0 }, /* Bandwidth values in KB/s */
[MODE_PWM][UFS_PWM_G1][UFS_LANE_1] = { 922 , 1000 },
[MODE_PWM][UFS_PWM_G2][UFS_LANE_1] = { 1844 , 1000 },
[MODE_PWM][UFS_PWM_G3][UFS_LANE_1] = { 3688 , 1000 },
[MODE_PWM][UFS_PWM_G4][UFS_LANE_1] = { 7376 , 1000 },
[MODE_PWM][UFS_PWM_G5][UFS_LANE_1] = { 14752 , 1000 },
[MODE_PWM][UFS_PWM_G1][UFS_LANE_2] = { 1844 , 1000 },
[MODE_PWM][UFS_PWM_G2][UFS_LANE_2] = { 3688 , 1000 },
[MODE_PWM][UFS_PWM_G3][UFS_LANE_2] = { 7376 , 1000 },
[MODE_PWM][UFS_PWM_G4][UFS_LANE_2] = { 14752 , 1000 },
[MODE_PWM][UFS_PWM_G5][UFS_LANE_2] = { 29504 , 1000 },
[MODE_HS_RA][UFS_HS_G1][UFS_LANE_1] = { 127796 , 1000 },
[MODE_HS_RA][UFS_HS_G2][UFS_LANE_1] = { 255591 , 1000 },
[MODE_HS_RA][UFS_HS_G3][UFS_LANE_1] = { 1492582 , 102400 },
[MODE_HS_RA][UFS_HS_G4][UFS_LANE_1] = { 2915200 , 204800 },
[MODE_HS_RA][UFS_HS_G5][UFS_LANE_1] = { 5836800 , 409600 },
[MODE_HS_RA][UFS_HS_G1][UFS_LANE_2] = { 255591 , 1000 },
[MODE_HS_RA][UFS_HS_G2][UFS_LANE_2] = { 511181 , 1000 },
[MODE_HS_RA][UFS_HS_G3][UFS_LANE_2] = { 1492582 , 204800 },
[MODE_HS_RA][UFS_HS_G4][UFS_LANE_2] = { 2915200 , 409600 },
[MODE_HS_RA][UFS_HS_G5][UFS_LANE_2] = { 5836800 , 819200 },
[MODE_HS_RB][UFS_HS_G1][UFS_LANE_1] = { 149422 , 1000 },
[MODE_HS_RB][UFS_HS_G2][UFS_LANE_1] = { 298189 , 1000 },
[MODE_HS_RB][UFS_HS_G3][UFS_LANE_1] = { 1492582 , 102400 },
[MODE_HS_RB][UFS_HS_G4][UFS_LANE_1] = { 2915200 , 204800 },
[MODE_HS_RB][UFS_HS_G5][UFS_LANE_1] = { 5836800 , 409600 },
[MODE_HS_RB][UFS_HS_G1][UFS_LANE_2] = { 298189 , 1000 },
[MODE_HS_RB][UFS_HS_G2][UFS_LANE_2] = { 596378 , 1000 },
[MODE_HS_RB][UFS_HS_G3][UFS_LANE_2] = { 1492582 , 204800 },
[MODE_HS_RB][UFS_HS_G4][UFS_LANE_2] = { 2915200 , 409600 },
[MODE_HS_RB][UFS_HS_G5][UFS_LANE_2] = { 5836800 , 819200 },
[MODE_MAX][0 ][0 ] = { 7643136 , 819200 },
};
static const struct {
int nminor;
char *prefix;
} testbus_info[TSTBUS_MAX] = {
[TSTBUS_UAWM] = {32 , "TSTBUS_UAWM" },
[TSTBUS_UARM] = {32 , "TSTBUS_UARM" },
[TSTBUS_TXUC] = {32 , "TSTBUS_TXUC" },
[TSTBUS_RXUC] = {32 , "TSTBUS_RXUC" },
[TSTBUS_DFC] = {32 , "TSTBUS_DFC" },
[TSTBUS_TRLUT] = {32 , "TSTBUS_TRLUT" },
[TSTBUS_TMRLUT] = {32 , "TSTBUS_TMRLUT" },
[TSTBUS_OCSC] = {32 , "TSTBUS_OCSC" },
[TSTBUS_UTP_HCI] = {32 , "TSTBUS_UTP_HCI" },
[TSTBUS_COMBINED] = {32 , "TSTBUS_COMBINED" },
[TSTBUS_WRAPPER] = {32 , "TSTBUS_WRAPPER" },
[TSTBUS_UNIPRO] = {256 , "TSTBUS_UNIPRO" },
};
static void ufs_qcom_get_default_testbus_cfg(struct ufs_qcom_host *host);
static unsigned long ufs_qcom_opp_freq_to_clk_freq(struct ufs_hba *hba,
unsigned long freq, char *name);
static int ufs_qcom_set_core_clk_ctrl(struct ufs_hba *hba, bool is_scale_up, unsigned long freq);
static struct ufs_qcom_host *rcdev_to_ufs_host(struct reset_controller_dev *rcd)
{
return container_of(rcd, struct ufs_qcom_host, rcdev);
}
#ifdef CONFIG_SCSI_UFS_CRYPTO
/**
* ufs_qcom_config_ice_allocator ( ) - ICE core allocator configuration
*
* @ host : pointer to qcom specific variant structure .
*/
static void ufs_qcom_config_ice_allocator(struct ufs_qcom_host *host)
{
struct ufs_hba *hba = host->hba;
static const uint8_t val[4 ] = { NUM_RX_R1W0, NUM_TX_R0W1, NUM_RX_R1W1, NUM_TX_R1W1 };
u32 config;
if (!(host->caps & UFS_QCOM_CAP_ICE_CONFIG) ||
!(host->hba->caps & UFSHCD_CAP_CRYPTO))
return ;
config = get_unaligned_le32(val);
ufshcd_writel(hba, ICE_ALLOCATOR_TYPE, REG_UFS_MEM_ICE_CONFIG);
ufshcd_writel(hba, config, REG_UFS_MEM_ICE_NUM_CORE);
}
static inline void ufs_qcom_ice_enable(struct ufs_qcom_host *host)
{
if (host->hba->caps & UFSHCD_CAP_CRYPTO)
qcom_ice_enable(host->ice);
}
static const struct blk_crypto_ll_ops ufs_qcom_crypto_ops; /* forward decl */
static int ufs_qcom_ice_init(struct ufs_qcom_host *host)
{
struct ufs_hba *hba = host->hba;
struct blk_crypto_profile *profile = &hba->crypto_profile;
struct device *dev = hba->dev;
struct qcom_ice *ice;
union ufs_crypto_capabilities caps;
union ufs_crypto_cap_entry cap;
int err;
int i;
ice = devm_of_qcom_ice_get(dev);
if (ice == ERR_PTR(-EOPNOTSUPP)) {
dev_warn(dev, "Disabling inline encryption support\n" );
ice = NULL;
}
if (IS_ERR_OR_NULL(ice))
return PTR_ERR_OR_ZERO(ice);
host->ice = ice;
/* Initialize the blk_crypto_profile */
caps.reg_val = cpu_to_le32(ufshcd_readl(hba, REG_UFS_CCAP));
/* The number of keyslots supported is (CFGC+1) */
err = devm_blk_crypto_profile_init(dev, profile, caps.config_count + 1 );
if (err)
return err;
profile->ll_ops = ufs_qcom_crypto_ops;
profile->max_dun_bytes_supported = 8 ;
profile->key_types_supported = qcom_ice_get_supported_key_type(ice);
profile->dev = dev;
/*
* Currently this driver only supports AES - 256 - XTS . All known versions
* of ICE support it , but to be safe make sure it is really declared in
* the crypto capability registers . The crypto capability registers
* also give the supported data unit size ( s ) .
*/
for (i = 0 ; i < caps.num_crypto_cap; i++) {
cap.reg_val = cpu_to_le32(ufshcd_readl(hba,
REG_UFS_CRYPTOCAP +
i * sizeof (__le32)));
if (cap.algorithm_id == UFS_CRYPTO_ALG_AES_XTS &&
cap.key_size == UFS_CRYPTO_KEY_SIZE_256)
profile->modes_supported[BLK_ENCRYPTION_MODE_AES_256_XTS] |=
cap.sdus_mask * 512 ;
}
hba->caps |= UFSHCD_CAP_CRYPTO;
hba->quirks |= UFSHCD_QUIRK_CUSTOM_CRYPTO_PROFILE;
return 0 ;
}
static inline int ufs_qcom_ice_resume(struct ufs_qcom_host *host)
{
if (host->hba->caps & UFSHCD_CAP_CRYPTO)
return qcom_ice_resume(host->ice);
return 0 ;
}
static inline int ufs_qcom_ice_suspend(struct ufs_qcom_host *host)
{
if (host->hba->caps & UFSHCD_CAP_CRYPTO)
return qcom_ice_suspend(host->ice);
return 0 ;
}
static int ufs_qcom_ice_keyslot_program(struct blk_crypto_profile *profile,
const struct blk_crypto_key *key,
unsigned int slot)
{
struct ufs_hba *hba = ufs_hba_from_crypto_profile(profile);
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
int err;
ufshcd_hold(hba);
err = qcom_ice_program_key(host->ice, slot, key);
ufshcd_release(hba);
return err;
}
static int ufs_qcom_ice_keyslot_evict(struct blk_crypto_profile *profile,
const struct blk_crypto_key *key,
unsigned int slot)
{
struct ufs_hba *hba = ufs_hba_from_crypto_profile(profile);
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
int err;
ufshcd_hold(hba);
err = qcom_ice_evict_key(host->ice, slot);
ufshcd_release(hba);
return err;
}
static int ufs_qcom_ice_derive_sw_secret(struct blk_crypto_profile *profile,
const u8 *eph_key, size_t eph_key_size,
u8 sw_secret[BLK_CRYPTO_SW_SECRET_SIZE])
{
struct ufs_hba *hba = ufs_hba_from_crypto_profile(profile);
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
return qcom_ice_derive_sw_secret(host->ice, eph_key, eph_key_size,
sw_secret);
}
static int ufs_qcom_ice_import_key(struct blk_crypto_profile *profile,
const u8 *raw_key, size_t raw_key_size,
u8 lt_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE])
{
struct ufs_hba *hba = ufs_hba_from_crypto_profile(profile);
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
return qcom_ice_import_key(host->ice, raw_key, raw_key_size, lt_key);
}
static int ufs_qcom_ice_generate_key(struct blk_crypto_profile *profile,
u8 lt_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE])
{
struct ufs_hba *hba = ufs_hba_from_crypto_profile(profile);
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
return qcom_ice_generate_key(host->ice, lt_key);
}
static int ufs_qcom_ice_prepare_key(struct blk_crypto_profile *profile,
const u8 *lt_key, size_t lt_key_size,
u8 eph_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE])
{
struct ufs_hba *hba = ufs_hba_from_crypto_profile(profile);
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
return qcom_ice_prepare_key(host->ice, lt_key, lt_key_size, eph_key);
}
static const struct blk_crypto_ll_ops ufs_qcom_crypto_ops = {
.keyslot_program = ufs_qcom_ice_keyslot_program,
.keyslot_evict = ufs_qcom_ice_keyslot_evict,
.derive_sw_secret = ufs_qcom_ice_derive_sw_secret,
.import_key = ufs_qcom_ice_import_key,
.generate_key = ufs_qcom_ice_generate_key,
.prepare_key = ufs_qcom_ice_prepare_key,
};
#else
static inline void ufs_qcom_ice_enable(struct ufs_qcom_host *host)
{
}
static int ufs_qcom_ice_init(struct ufs_qcom_host *host)
{
return 0 ;
}
static inline int ufs_qcom_ice_resume(struct ufs_qcom_host *host)
{
return 0 ;
}
static inline int ufs_qcom_ice_suspend(struct ufs_qcom_host *host)
{
return 0 ;
}
static void ufs_qcom_config_ice_allocator(struct ufs_qcom_host *host)
{
}
#endif
static void ufs_qcom_disable_lane_clks(struct ufs_qcom_host *host)
{
if (!host->is_lane_clks_enabled)
return ;
clk_bulk_disable_unprepare(host->num_clks, host->clks);
host->is_lane_clks_enabled = false ;
}
static int ufs_qcom_enable_lane_clks(struct ufs_qcom_host *host)
{
int err;
err = clk_bulk_prepare_enable(host->num_clks, host->clks);
if (err)
return err;
host->is_lane_clks_enabled = true ;
return 0 ;
}
static int ufs_qcom_init_lane_clks(struct ufs_qcom_host *host)
{
int err;
struct device *dev = host->hba->dev;
if (has_acpi_companion(dev))
return 0 ;
err = devm_clk_bulk_get_all(dev, &host->clks);
if (err <= 0 )
return err;
host->num_clks = err;
return 0 ;
}
static int ufs_qcom_check_hibern8(struct ufs_hba *hba)
{
int err;
u32 tx_fsm_val;
unsigned long timeout = jiffies + msecs_to_jiffies(HBRN8_POLL_TOUT_MS);
do {
err = ufshcd_dme_get(hba,
UIC_ARG_MIB_SEL(MPHY_TX_FSM_STATE,
UIC_ARG_MPHY_TX_GEN_SEL_INDEX(0 )),
&tx_fsm_val);
if (err || tx_fsm_val == TX_FSM_HIBERN8)
break ;
/* sleep for max. 200us */
usleep_range(100 , 200 );
} while (time_before(jiffies, timeout));
/*
* we might have scheduled out for long during polling so
* check the state again .
*/
if (time_after(jiffies, timeout))
err = ufshcd_dme_get(hba,
UIC_ARG_MIB_SEL(MPHY_TX_FSM_STATE,
UIC_ARG_MPHY_TX_GEN_SEL_INDEX(0 )),
&tx_fsm_val);
if (err) {
dev_err(hba->dev, "%s: unable to get TX_FSM_STATE, err %d\n" ,
__func__, err);
} else if (tx_fsm_val != TX_FSM_HIBERN8) {
err = tx_fsm_val;
dev_err(hba->dev, "%s: invalid TX_FSM_STATE = %d\n" ,
__func__, err);
}
return err;
}
static void ufs_qcom_select_unipro_mode(struct ufs_qcom_host *host)
{
ufshcd_rmwl(host->hba, QUNIPRO_SEL, QUNIPRO_SEL, REG_UFS_CFG1);
if (host->hw_ver.major >= 0 x05)
ufshcd_rmwl(host->hba, QUNIPRO_G4_SEL, 0 , REG_UFS_CFG0);
}
/*
* ufs_qcom_host_reset - reset host controller and PHY
*/
static int ufs_qcom_host_reset(struct ufs_hba *hba)
{
int ret;
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
bool reenable_intr;
if (!host->core_reset)
return 0 ;
reenable_intr = hba->is_irq_enabled;
ufshcd_disable_irq(hba);
ret = reset_control_assert(host->core_reset);
if (ret) {
dev_err(hba->dev, "%s: core_reset assert failed, err = %d\n" ,
__func__, ret);
return ret;
}
/*
* The hardware requirement for delay between assert / deassert
* is at least 3 - 4 sleep clock ( 32 . 7 KHz ) cycles , which comes to
* ~ 125 us ( 4 / 32768 ) . To be on the safe side add 200 us delay .
*/
usleep_range(200 , 210 );
ret = reset_control_deassert(host->core_reset);
if (ret) {
dev_err(hba->dev, "%s: core_reset deassert failed, err = %d\n" ,
__func__, ret);
return ret;
}
usleep_range(1000 , 1100 );
if (reenable_intr)
ufshcd_enable_irq(hba);
return 0 ;
}
static u32 ufs_qcom_get_hs_gear(struct ufs_hba *hba)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
if (host->hw_ver.major >= 0 x4)
return UFS_QCOM_MAX_GEAR(ufshcd_readl(hba, REG_UFS_PARAM0));
/* Default is HS-G3 */
return UFS_HS_G3;
}
static int ufs_qcom_power_up_sequence(struct ufs_hba *hba)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
struct ufs_host_params *host_params = &host->host_params;
struct phy *phy = host->generic_phy;
enum phy_mode mode;
int ret;
/*
* HW ver 5 can only support up to HS - G5 Rate - A due to HW limitations .
* If the HS - G5 PHY gear is used , update host_params - > hs_rate to Rate - A ,
* so that the subsequent power mode change shall stick to Rate - A .
*/
if (host->hw_ver.major == 0 x5) {
if (host->phy_gear == UFS_HS_G5)
host_params->hs_rate = PA_HS_MODE_A;
else
host_params->hs_rate = PA_HS_MODE_B;
}
mode = host_params->hs_rate == PA_HS_MODE_B ? PHY_MODE_UFS_HS_B : PHY_MODE_UFS_HS_A;
/* Reset UFS Host Controller and PHY */
ret = ufs_qcom_host_reset(hba);
if (ret)
return ret;
if (phy->power_count)
phy_power_off(phy);
/* phy initialization - calibrate the phy */
ret = phy_init(phy);
if (ret) {
dev_err(hba->dev, "%s: phy init failed, ret = %d\n" ,
__func__, ret);
return ret;
}
ret = phy_set_mode_ext(phy, mode, host->phy_gear);
if (ret)
goto out_disable_phy;
/* power on phy - start serdes and phy's power and clocks */
ret = phy_power_on(phy);
if (ret) {
dev_err(hba->dev, "%s: phy power on failed, ret = %d\n" ,
__func__, ret);
goto out_disable_phy;
}
ret = phy_calibrate(phy);
if (ret) {
dev_err(hba->dev, "Failed to calibrate PHY: %d\n" , ret);
goto out_disable_phy;
}
ufs_qcom_select_unipro_mode(host);
return 0 ;
out_disable_phy:
phy_exit(phy);
return ret;
}
/*
* The UTP controller has a number of internal clock gating cells ( CGCs ) .
* Internal hardware sub - modules within the UTP controller control the CGCs .
* Hardware CGCs disable the clock to inactivate UTP sub - modules not involved
* in a specific operation , UTP controller CGCs are by default disabled and
* this function enables them ( after every UFS link startup ) to save some power
* leakage .
*/
static void ufs_qcom_enable_hw_clk_gating(struct ufs_hba *hba)
{
int err;
/* Enable UTP internal clock gating */
ufshcd_rmwl(hba, REG_UFS_CFG2_CGC_EN_ALL, REG_UFS_CFG2_CGC_EN_ALL,
REG_UFS_CFG2);
/* Ensure that HW clock gating is enabled before next operations */
ufshcd_readl(hba, REG_UFS_CFG2);
/* Enable Unipro internal clock gating */
err = ufshcd_dme_rmw(hba, DL_VS_CLK_CFG_MASK,
DL_VS_CLK_CFG_MASK, DL_VS_CLK_CFG);
if (err)
goto out;
err = ufshcd_dme_rmw(hba, PA_VS_CLK_CFG_REG_MASK,
PA_VS_CLK_CFG_REG_MASK, PA_VS_CLK_CFG_REG);
if (err)
goto out;
err = ufshcd_dme_rmw(hba, DME_VS_CORE_CLK_CTRL_DME_HW_CGC_EN,
DME_VS_CORE_CLK_CTRL_DME_HW_CGC_EN,
DME_VS_CORE_CLK_CTRL);
out:
if (err)
dev_err(hba->dev, "hw clk gating enabled failed\n" );
}
static int ufs_qcom_hce_enable_notify(struct ufs_hba *hba,
enum ufs_notify_change_status status)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
int err;
switch (status) {
case PRE_CHANGE:
err = ufs_qcom_power_up_sequence(hba);
if (err)
return err;
/*
* The PHY PLL output is the source of tx / rx lane symbol
* clocks , hence , enable the lane clocks only after PHY
* is initialized .
*/
err = ufs_qcom_enable_lane_clks(host);
break ;
case POST_CHANGE:
/* check if UFS PHY moved from DISABLED to HIBERN8 */
err = ufs_qcom_check_hibern8(hba);
ufs_qcom_enable_hw_clk_gating(hba);
ufs_qcom_ice_enable(host);
ufs_qcom_config_ice_allocator(host);
break ;
default :
dev_err(hba->dev, "%s: invalid status %d\n" , __func__, status);
err = -EINVAL;
break ;
}
return err;
}
/**
* ufs_qcom_cfg_timers - Configure ufs qcom cfg timers
*
* @ hba : host controller instance
* @ is_pre_scale_up : flag to check if pre scale up condition .
* @ freq : target opp freq
* Return : zero for success and non - zero in case of a failure .
*/
static int ufs_qcom_cfg_timers(struct ufs_hba *hba, bool is_pre_scale_up, unsigned long freq)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
struct ufs_clk_info *clki;
unsigned long clk_freq = 0 ;
u32 core_clk_cycles_per_us;
/*
* UTP controller uses SYS1CLK_1US_REG register for Interrupt
* Aggregation logic .
* It is mandatory to write SYS1CLK_1US_REG register on UFS host
* controller V4 . 0 . 0 onwards .
*/
if (host->hw_ver.major < 4 && !ufshcd_is_intr_aggr_allowed(hba))
return 0 ;
if (hba->use_pm_opp && freq != ULONG_MAX) {
clk_freq = ufs_qcom_opp_freq_to_clk_freq(hba, freq, "core_clk" );
if (clk_freq)
goto cfg_timers;
}
list_for_each_entry(clki, &hba->clk_list_head, list) {
if (!strcmp(clki->name, "core_clk" )) {
if (freq == ULONG_MAX) {
clk_freq = clki->max_freq;
break ;
}
if (is_pre_scale_up)
clk_freq = clki->max_freq;
else
clk_freq = clk_get_rate(clki->clk);
break ;
}
}
cfg_timers:
/* If frequency is smaller than 1MHz, set to 1MHz */
if (clk_freq < DEFAULT_CLK_RATE_HZ)
clk_freq = DEFAULT_CLK_RATE_HZ;
core_clk_cycles_per_us = clk_freq / USEC_PER_SEC;
if (ufshcd_readl(hba, REG_UFS_SYS1CLK_1US) != core_clk_cycles_per_us) {
ufshcd_writel(hba, core_clk_cycles_per_us, REG_UFS_SYS1CLK_1US);
/*
* make sure above write gets applied before we return from
* this function .
*/
ufshcd_readl(hba, REG_UFS_SYS1CLK_1US);
}
return 0 ;
}
static int ufs_qcom_link_startup_notify(struct ufs_hba *hba,
enum ufs_notify_change_status status)
{
int err = 0 ;
switch (status) {
case PRE_CHANGE:
if (ufs_qcom_cfg_timers(hba, false , ULONG_MAX)) {
dev_err(hba->dev, "%s: ufs_qcom_cfg_timers() failed\n" ,
__func__);
return -EINVAL;
}
err = ufs_qcom_set_core_clk_ctrl(hba, true , ULONG_MAX);
if (err)
dev_err(hba->dev, "cfg core clk ctrl failed\n" );
/*
* Some UFS devices ( and may be host ) have issues if LCC is
* enabled . So we are setting PA_Local_TX_LCC_Enable to 0
* before link startup which will make sure that both host
* and device TX LCC are disabled once link startup is
* completed .
*/
err = ufshcd_disable_host_tx_lcc(hba);
break ;
default :
break ;
}
return err;
}
static void ufs_qcom_device_reset_ctrl(struct ufs_hba *hba, bool asserted)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
/* reset gpio is optional */
if (!host->device_reset)
return ;
gpiod_set_value_cansleep(host->device_reset, asserted);
}
static int ufs_qcom_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op,
enum ufs_notify_change_status status)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
if (status == PRE_CHANGE)
return 0 ;
if (!ufs_qcom_is_link_active(hba))
ufs_qcom_disable_lane_clks(host);
/* reset the connected UFS device during power down */
if (ufs_qcom_is_link_off(hba) && host->device_reset)
ufs_qcom_device_reset_ctrl(hba, true );
return ufs_qcom_ice_suspend(host);
}
static int ufs_qcom_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
int err;
u32 reg_val;
err = ufs_qcom_enable_lane_clks(host);
if (err)
return err;
if ((!ufs_qcom_is_link_active(hba)) &&
host->hw_ver.major == 5 &&
host->hw_ver.minor == 0 &&
host->hw_ver.step == 0 ) {
ufshcd_writel(hba, UFS_ICE_SYNC_RST_SEL | UFS_ICE_SYNC_RST_SW, UFS_MEM_ICE_CFG);
reg_val = ufshcd_readl(hba, UFS_MEM_ICE_CFG);
reg_val &= ~(UFS_ICE_SYNC_RST_SEL | UFS_ICE_SYNC_RST_SW);
/*
* HW documentation doesn ' t recommend any delay between the
* reset set and clear . But we are enforcing an arbitrary delay
* to give flops enough time to settle in .
*/
usleep_range(50 , 100 );
ufshcd_writel(hba, reg_val, UFS_MEM_ICE_CFG);
ufshcd_readl(hba, UFS_MEM_ICE_CFG);
}
return ufs_qcom_ice_resume(host);
}
static void ufs_qcom_dev_ref_clk_ctrl(struct ufs_qcom_host *host, bool enable)
{
if (host->dev_ref_clk_ctrl_mmio &&
(enable ^ host->is_dev_ref_clk_enabled)) {
u32 temp = readl_relaxed(host->dev_ref_clk_ctrl_mmio);
if (enable)
temp |= host->dev_ref_clk_en_mask;
else
temp &= ~host->dev_ref_clk_en_mask;
/*
* If we are here to disable this clock it might be immediately
* after entering into hibern8 in which case we need to make
* sure that device ref_clk is active for specific time after
* hibern8 enter .
*/
if (!enable) {
unsigned long gating_wait;
gating_wait = host->hba->dev_info.clk_gating_wait_us;
if (!gating_wait) {
udelay(1 );
} else {
/*
* bRefClkGatingWaitTime defines the minimum
* time for which the reference clock is
* required by device during transition from
* HS - MODE to LS - MODE or HIBERN8 state . Give it
* more delay to be on the safe side .
*/
gating_wait += 10 ;
usleep_range(gating_wait, gating_wait + 10 );
}
}
writel_relaxed(temp, host->dev_ref_clk_ctrl_mmio);
/*
* Make sure the write to ref_clk reaches the destination and
* not stored in a Write Buffer ( WB ) .
*/
readl(host->dev_ref_clk_ctrl_mmio);
/*
* If we call hibern8 exit after this , we need to make sure that
* device ref_clk is stable for at least 1 us before the hibern8
* exit command .
*/
if (enable)
udelay(1 );
host->is_dev_ref_clk_enabled = enable;
}
}
static int ufs_qcom_icc_set_bw(struct ufs_qcom_host *host, u32 mem_bw, u32 cfg_bw)
{
struct device *dev = host->hba->dev;
int ret;
ret = icc_set_bw(host->icc_ddr, 0 , mem_bw);
if (ret < 0 ) {
dev_err(dev, "failed to set bandwidth request: %d\n" , ret);
return ret;
}
ret = icc_set_bw(host->icc_cpu, 0 , cfg_bw);
if (ret < 0 ) {
dev_err(dev, "failed to set bandwidth request: %d\n" , ret);
return ret;
}
return 0 ;
}
static struct __ufs_qcom_bw_table ufs_qcom_get_bw_table(struct ufs_qcom_host *host)
{
struct ufs_pa_layer_attr *p = &host->dev_req_params;
int gear = max_t(u32, p->gear_rx, p->gear_tx);
int lane = max_t(u32, p->lane_rx, p->lane_tx);
if (WARN_ONCE(gear > QCOM_UFS_MAX_GEAR,
"ICC scaling for UFS Gear (%d) not supported. Using Gear (%d) bandwidth\n" ,
gear, QCOM_UFS_MAX_GEAR))
gear = QCOM_UFS_MAX_GEAR;
if (WARN_ONCE(lane > QCOM_UFS_MAX_LANE,
"ICC scaling for UFS Lane (%d) not supported. Using Lane (%d) bandwidth\n" ,
lane, QCOM_UFS_MAX_LANE))
lane = QCOM_UFS_MAX_LANE;
if (ufshcd_is_hs_mode(p)) {
if (p->hs_rate == PA_HS_MODE_B)
return ufs_qcom_bw_table[MODE_HS_RB][gear][lane];
else
return ufs_qcom_bw_table[MODE_HS_RA][gear][lane];
} else {
return ufs_qcom_bw_table[MODE_PWM][gear][lane];
}
}
static int ufs_qcom_icc_update_bw(struct ufs_qcom_host *host)
{
struct __ufs_qcom_bw_table bw_table;
bw_table = ufs_qcom_get_bw_table(host);
return ufs_qcom_icc_set_bw(host, bw_table.mem_bw, bw_table.cfg_bw);
}
static void ufs_qcom_set_tx_hs_equalizer(struct ufs_hba *hba, u32 gear, u32 tx_lanes)
{
u32 equalizer_val;
int ret, i;
/* Determine the equalizer value based on the gear */
equalizer_val = (gear == 5 ) ? DEEMPHASIS_3_5_dB : NO_DEEMPHASIS;
for (i = 0 ; i < tx_lanes; i++) {
ret = ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(TX_HS_EQUALIZER, i),
equalizer_val);
if (ret)
dev_err(hba->dev, "%s: failed equalizer lane %d\n" ,
__func__, i);
}
}
static int ufs_qcom_pwr_change_notify(struct ufs_hba *hba,
enum ufs_notify_change_status status,
const struct ufs_pa_layer_attr *dev_max_params,
struct ufs_pa_layer_attr *dev_req_params)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
struct ufs_host_params *host_params = &host->host_params;
int ret = 0 ;
if (!dev_req_params) {
pr_err("%s: incoming dev_req_params is NULL\n" , __func__);
return -EINVAL;
}
switch (status) {
case PRE_CHANGE:
ret = ufshcd_negotiate_pwr_params(host_params, dev_max_params, dev_req_params);
if (ret) {
dev_err(hba->dev, "%s: failed to determine capabilities\n" ,
__func__);
return ret;
}
/*
* During UFS driver probe , always update the PHY gear to match the negotiated
* gear , so that , if quirk UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH is enabled ,
* the second init can program the optimal PHY settings . This allows one to start
* the first init with either the minimum or the maximum support gear .
*/
if (hba->ufshcd_state == UFSHCD_STATE_RESET) {
/*
* Skip REINIT if the negotiated gear matches with the
* initial phy_gear . Otherwise , update the phy_gear to
* program the optimal gear setting during REINIT .
*/
if (host->phy_gear == dev_req_params->gear_tx)
hba->quirks &= ~UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH;
else
host->phy_gear = dev_req_params->gear_tx;
}
/* enable the device ref clock before changing to HS mode */
if (!ufshcd_is_hs_mode(&hba->pwr_info) &&
ufshcd_is_hs_mode(dev_req_params))
ufs_qcom_dev_ref_clk_ctrl(host, true );
if (host->hw_ver.major >= 0 x4) {
ufshcd_dme_configure_adapt(hba,
dev_req_params->gear_tx,
PA_INITIAL_ADAPT);
}
if (hba->dev_quirks & UFS_DEVICE_QUIRK_PA_TX_DEEMPHASIS_TUNING)
ufs_qcom_set_tx_hs_equalizer(hba,
dev_req_params->gear_tx, dev_req_params->lane_tx);
break ;
case POST_CHANGE:
/* cache the power mode parameters to use internally */
memcpy(&host->dev_req_params,
dev_req_params, sizeof (*dev_req_params));
ufs_qcom_icc_update_bw(host);
/* disable the device ref clock if entered PWM mode */
if (ufshcd_is_hs_mode(&hba->pwr_info) &&
!ufshcd_is_hs_mode(dev_req_params))
ufs_qcom_dev_ref_clk_ctrl(host, false );
break ;
default :
ret = -EINVAL;
break ;
}
return ret;
}
static int ufs_qcom_quirk_host_pa_saveconfigtime(struct ufs_hba *hba)
{
int err;
u32 pa_vs_config_reg1;
err = ufshcd_dme_get(hba, UIC_ARG_MIB(PA_VS_CONFIG_REG1),
&pa_vs_config_reg1);
if (err)
return err;
/* Allow extension of MSB bits of PA_SaveConfigTime attribute */
return ufshcd_dme_set(hba, UIC_ARG_MIB(PA_VS_CONFIG_REG1),
(pa_vs_config_reg1 | (1 << 12 )));
}
static void ufs_qcom_override_pa_tx_hsg1_sync_len(struct ufs_hba *hba)
{
int err;
err = ufshcd_dme_peer_set(hba, UIC_ARG_MIB(PA_TX_HSG1_SYNC_LENGTH),
PA_TX_HSG1_SYNC_LENGTH_VAL);
if (err)
dev_err(hba->dev, "Failed (%d) set PA_TX_HSG1_SYNC_LENGTH\n" , err);
}
static int ufs_qcom_apply_dev_quirks(struct ufs_hba *hba)
{
int err = 0 ;
if (hba->dev_quirks & UFS_DEVICE_QUIRK_HOST_PA_SAVECONFIGTIME)
err = ufs_qcom_quirk_host_pa_saveconfigtime(hba);
if (hba->dev_quirks & UFS_DEVICE_QUIRK_PA_TX_HSG1_SYNC_LENGTH)
ufs_qcom_override_pa_tx_hsg1_sync_len(hba);
return err;
}
/* UFS device-specific quirks */
static struct ufs_dev_quirk ufs_qcom_dev_fixups[] = {
{ .wmanufacturerid = UFS_VENDOR_SKHYNIX,
.model = UFS_ANY_MODEL,
.quirk = UFS_DEVICE_QUIRK_DELAY_BEFORE_LPM },
{ .wmanufacturerid = UFS_VENDOR_TOSHIBA,
.model = UFS_ANY_MODEL,
.quirk = UFS_DEVICE_QUIRK_DELAY_AFTER_LPM },
{ .wmanufacturerid = UFS_VENDOR_WDC,
.model = UFS_ANY_MODEL,
.quirk = UFS_DEVICE_QUIRK_HOST_PA_TACTIVATE },
{ .wmanufacturerid = UFS_VENDOR_SAMSUNG,
.model = UFS_ANY_MODEL,
.quirk = UFS_DEVICE_QUIRK_PA_TX_HSG1_SYNC_LENGTH |
UFS_DEVICE_QUIRK_PA_TX_DEEMPHASIS_TUNING },
{}
};
static void ufs_qcom_fixup_dev_quirks(struct ufs_hba *hba)
{
ufshcd_fixup_dev_quirks(hba, ufs_qcom_dev_fixups);
}
static u32 ufs_qcom_get_ufs_hci_version(struct ufs_hba *hba)
{
return ufshci_version(2 , 0 );
}
/**
* ufs_qcom_advertise_quirks - advertise the known QCOM UFS controller quirks
* @ hba : host controller instance
*
* QCOM UFS host controller might have some non standard behaviours ( quirks )
* than what is specified by UFSHCI specification . Advertise all such
* quirks to standard UFS host controller driver so standard takes them into
* account .
*/
static void ufs_qcom_advertise_quirks(struct ufs_hba *hba)
{
const struct ufs_qcom_drvdata *drvdata = of_device_get_match_data(hba->dev);
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
if (host->hw_ver.major == 0 x2)
hba->quirks |= UFSHCD_QUIRK_BROKEN_UFS_HCI_VERSION;
if (host->hw_ver.major > 0 x3)
hba->quirks |= UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH;
if (drvdata && drvdata->quirks)
hba->quirks |= drvdata->quirks;
}
static void ufs_qcom_set_phy_gear(struct ufs_qcom_host *host)
{
struct ufs_host_params *host_params = &host->host_params;
u32 val, dev_major;
/*
* Default to powering up the PHY to the max gear possible , which is
* backwards compatible with lower gears but not optimal from
* a power usage point of view . After device negotiation , if the
* gear is lower a reinit will be performed to program the PHY
* to the ideal gear for this combo of controller and device .
*/
host->phy_gear = host_params->hs_tx_gear;
if (host->hw_ver.major < 0 x4) {
/*
* These controllers only have one PHY init sequence ,
* let ' s power up the PHY using that ( the minimum supported
* gear , UFS_HS_G2 ) .
*/
host->phy_gear = UFS_HS_G2;
} else if (host->hw_ver.major >= 0 x5) {
val = ufshcd_readl(host->hba, REG_UFS_DEBUG_SPARE_CFG);
dev_major = FIELD_GET(UFS_DEV_VER_MAJOR_MASK, val);
/*
* Since the UFS device version is populated , let ' s remove the
* REINIT quirk as the negotiated gear won ' t change during boot .
* So there is no need to do reinit .
*/
if (dev_major != 0 x0)
host->hba->quirks &= ~UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH;
/*
* For UFS 3 . 1 device and older , power up the PHY using HS - G4
* PHY gear to save power .
*/
if (dev_major > 0 x0 && dev_major < 0 x4)
host->phy_gear = UFS_HS_G4;
}
}
static void ufs_qcom_set_host_params(struct ufs_hba *hba)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
struct ufs_host_params *host_params = &host->host_params;
ufshcd_init_host_params(host_params);
/* This driver only supports symmetic gear setting i.e., hs_tx_gear == hs_rx_gear */
host_params->hs_tx_gear = host_params->hs_rx_gear = ufs_qcom_get_hs_gear(hba);
}
static void ufs_qcom_set_host_caps(struct ufs_hba *hba)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
if (host->hw_ver.major >= 0 x5)
host->caps |= UFS_QCOM_CAP_ICE_CONFIG;
}
static void ufs_qcom_set_caps(struct ufs_hba *hba)
{
hba->caps |= UFSHCD_CAP_CLK_GATING | UFSHCD_CAP_HIBERN8_WITH_CLK_GATING;
hba->caps |= UFSHCD_CAP_CLK_SCALING | UFSHCD_CAP_WB_WITH_CLK_SCALING;
hba->caps |= UFSHCD_CAP_AUTO_BKOPS_SUSPEND;
hba->caps |= UFSHCD_CAP_WB_EN;
hba->caps |= UFSHCD_CAP_AGGR_POWER_COLLAPSE;
hba->caps |= UFSHCD_CAP_RPM_AUTOSUSPEND;
ufs_qcom_set_host_caps(hba);
}
/**
* ufs_qcom_setup_clocks - enables / disable clocks
* @ hba : host controller instance
* @ on : If true , enable clocks else disable them .
* @ status : PRE_CHANGE or POST_CHANGE notify
*
* There are certain clocks which comes from the PHY so it needs
* to be managed together along with controller clocks which also
* provides a better power saving . Hence keep phy_power_off / on calls
* in ufs_qcom_setup_clocks , so that PHY ' s regulators & clks can be
* turned on / off along with UFS ' s clocks .
*
* Return : 0 on success , non - zero on failure .
*/
static int ufs_qcom_setup_clocks(struct ufs_hba *hba, bool on,
enum ufs_notify_change_status status)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
struct phy *phy;
int err;
/*
* In case ufs_qcom_init ( ) is not yet done , simply ignore .
* This ufs_qcom_setup_clocks ( ) shall be called from
* ufs_qcom_init ( ) after init is done .
*/
if (!host)
return 0 ;
phy = host->generic_phy;
switch (status) {
case PRE_CHANGE:
if (on) {
ufs_qcom_icc_update_bw(host);
if (ufs_qcom_is_link_hibern8(hba)) {
err = ufs_qcom_enable_lane_clks(host);
if (err) {
dev_err(hba->dev, "enable lane clks failed, ret=%d\n" , err);
return err;
}
}
} else {
if (!ufs_qcom_is_link_active(hba)) {
/* disable device ref_clk */
ufs_qcom_dev_ref_clk_ctrl(host, false );
}
err = phy_power_off(phy);
if (err) {
dev_err(hba->dev, "phy power off failed, ret=%d\n" , err);
return err;
}
}
break ;
case POST_CHANGE:
if (on) {
err = phy_power_on(phy);
if (err) {
dev_err(hba->dev, "phy power on failed, ret = %d\n" , err);
return err;
}
/* enable the device ref clock for HS mode*/
if (ufshcd_is_hs_mode(&hba->pwr_info))
ufs_qcom_dev_ref_clk_ctrl(host, true );
} else {
if (ufs_qcom_is_link_hibern8(hba))
ufs_qcom_disable_lane_clks(host);
ufs_qcom_icc_set_bw(host, ufs_qcom_bw_table[MODE_MIN][0 ][0 ].mem_bw,
ufs_qcom_bw_table[MODE_MIN][0 ][0 ].cfg_bw);
}
break ;
}
return 0 ;
}
static int
ufs_qcom_reset_assert(struct reset_controller_dev *rcdev, unsigned long id)
{
struct ufs_qcom_host *host = rcdev_to_ufs_host(rcdev);
ufs_qcom_assert_reset(host->hba);
/* provide 1ms delay to let the reset pulse propagate. */
usleep_range(1000 , 1100 );
return 0 ;
}
static int
ufs_qcom_reset_deassert(struct reset_controller_dev *rcdev, unsigned long id)
{
struct ufs_qcom_host *host = rcdev_to_ufs_host(rcdev);
ufs_qcom_deassert_reset(host->hba);
/*
* after reset deassertion , phy will need all ref clocks ,
* voltage , current to settle down before starting serdes .
*/
usleep_range(1000 , 1100 );
return 0 ;
}
static const struct reset_control_ops ufs_qcom_reset_ops = {
.assert = ufs_qcom_reset_assert,
.deassert = ufs_qcom_reset_deassert,
};
static int ufs_qcom_icc_init(struct ufs_qcom_host *host)
{
struct device *dev = host->hba->dev;
int ret;
host->icc_ddr = devm_of_icc_get(dev, "ufs-ddr" );
if (IS_ERR(host->icc_ddr))
return dev_err_probe(dev, PTR_ERR(host->icc_ddr),
"failed to acquire interconnect path\n" );
host->icc_cpu = devm_of_icc_get(dev, "cpu-ufs" );
if (IS_ERR(host->icc_cpu))
return dev_err_probe(dev, PTR_ERR(host->icc_cpu),
"failed to acquire interconnect path\n" );
/*
* Set Maximum bandwidth vote before initializing the UFS controller and
* device . Ideally , a minimal interconnect vote would suffice for the
* initialization , but a max vote would allow faster initialization .
*/
ret = ufs_qcom_icc_set_bw(host, ufs_qcom_bw_table[MODE_MAX][0 ][0 ].mem_bw,
ufs_qcom_bw_table[MODE_MAX][0 ][0 ].cfg_bw);
if (ret < 0 )
return dev_err_probe(dev, ret, "failed to set bandwidth request\n" );
return 0 ;
}
/**
* ufs_qcom_init - bind phy with controller
* @ hba : host controller instance
*
* Binds PHY with controller and powers up PHY enabling clocks
* and regulators .
*
* Return : - EPROBE_DEFER if binding fails , returns negative error
* on phy power up failure and returns zero on success .
*/
static int ufs_qcom_init(struct ufs_hba *hba)
{
int err;
struct device *dev = hba->dev;
struct ufs_qcom_host *host;
struct ufs_clk_info *clki;
const struct ufs_qcom_drvdata *drvdata = of_device_get_match_data(hba->dev);
host = devm_kzalloc(dev, sizeof (*host), GFP_KERNEL);
if (!host)
return -ENOMEM;
/* Make a two way bind between the qcom host and the hba */
host->hba = hba;
ufshcd_set_variant(hba, host);
/* Setup the optional reset control of HCI */
host->core_reset = devm_reset_control_get_optional(hba->dev, "rst" );
if (IS_ERR(host->core_reset)) {
err = dev_err_probe(dev, PTR_ERR(host->core_reset),
"Failed to get reset control\n" );
goto out_variant_clear;
}
/* Fire up the reset controller. Failure here is non-fatal. */
host->rcdev.of_node = dev->of_node;
host->rcdev.ops = &ufs_qcom_reset_ops;
host->rcdev.owner = dev->driver->owner;
host->rcdev.nr_resets = 1 ;
err = devm_reset_controller_register(dev, &host->rcdev);
if (err)
dev_warn(dev, "Failed to register reset controller\n" );
if (!has_acpi_companion(dev)) {
host->generic_phy = devm_phy_get(dev, "ufsphy" );
if (IS_ERR(host->generic_phy)) {
err = dev_err_probe(dev, PTR_ERR(host->generic_phy), "Failed to get PHY\n" );
goto out_variant_clear;
}
}
err = ufs_qcom_icc_init(host);
if (err)
goto out_variant_clear;
host->device_reset = devm_gpiod_get_optional(dev, "reset" ,
GPIOD_OUT_HIGH);
if (IS_ERR(host->device_reset)) {
err = dev_err_probe(dev, PTR_ERR(host->device_reset),
"Failed to acquire device reset gpio\n" );
goto out_variant_clear;
}
ufs_qcom_get_controller_revision(hba, &host->hw_ver.major,
&host->hw_ver.minor, &host->hw_ver.step);
host->dev_ref_clk_ctrl_mmio = hba->mmio_base + REG_UFS_CFG1;
host->dev_ref_clk_en_mask = BIT(26 );
list_for_each_entry(clki, &hba->clk_list_head, list) {
if (!strcmp(clki->name, "core_clk_unipro" ))
clki->keep_link_active = true ;
}
err = ufs_qcom_init_lane_clks(host);
if (err)
goto out_variant_clear;
ufs_qcom_set_caps(hba);
ufs_qcom_advertise_quirks(hba);
ufs_qcom_set_host_params(hba);
ufs_qcom_set_phy_gear(host);
err = ufs_qcom_ice_init(host);
if (err)
goto out_variant_clear;
ufs_qcom_setup_clocks(hba, true , POST_CHANGE);
ufs_qcom_get_default_testbus_cfg(host);
err = ufs_qcom_testbus_config(host);
if (err)
/* Failure is non-fatal */
dev_warn(dev, "%s: failed to configure the testbus %d\n" ,
__func__, err);
if (drvdata && drvdata->no_phy_retention)
hba->spm_lvl = UFS_PM_LVL_5;
return 0 ;
out_variant_clear:
ufshcd_set_variant(hba, NULL);
return err;
}
static void ufs_qcom_exit(struct ufs_hba *hba)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
ufs_qcom_disable_lane_clks(host);
phy_power_off(host->generic_phy);
phy_exit(host->generic_phy);
}
/**
* ufs_qcom_set_clk_40ns_cycles - Configure 40 ns clk cycles
*
* @ hba : host controller instance
* @ cycles_in_1us : No of cycles in 1 us to be configured
*
* Returns error if dme get / set configuration for 40 ns fails
* and returns zero on success .
*/
static int ufs_qcom_set_clk_40ns_cycles(struct ufs_hba *hba,
u32 cycles_in_1us)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
u32 cycles_in_40ns;
u32 reg;
int err;
/*
* UFS host controller V4 . 0 . 0 onwards needs to program
* PA_VS_CORE_CLK_40NS_CYCLES attribute per programmed
* frequency of unipro core clk of UFS host controller .
*/
if (host->hw_ver.major < 4 )
return 0 ;
/*
* Generic formulae for cycles_in_40ns = ( freq_unipro / 25 ) is not
* applicable for all frequencies . For ex : ceil ( 37 . 5 MHz / 25 ) will
* be 2 and ceil ( 403 MHZ / 25 ) will be 17 whereas Hardware
* specification expect to be 16 . Hence use exact hardware spec
* mandated value for cycles_in_40ns instead of calculating using
* generic formulae .
*/
switch (cycles_in_1us) {
case UNIPRO_CORE_CLK_FREQ_403_MHZ:
cycles_in_40ns = 16 ;
break ;
case UNIPRO_CORE_CLK_FREQ_300_MHZ:
cycles_in_40ns = 12 ;
break ;
case UNIPRO_CORE_CLK_FREQ_201_5_MHZ:
cycles_in_40ns = 8 ;
break ;
case UNIPRO_CORE_CLK_FREQ_150_MHZ:
cycles_in_40ns = 6 ;
break ;
case UNIPRO_CORE_CLK_FREQ_100_MHZ:
cycles_in_40ns = 4 ;
break ;
case UNIPRO_CORE_CLK_FREQ_75_MHZ:
cycles_in_40ns = 3 ;
break ;
case UNIPRO_CORE_CLK_FREQ_37_5_MHZ:
cycles_in_40ns = 2 ;
break ;
default :
dev_err(hba->dev, "UNIPRO clk freq %u MHz not supported\n" ,
cycles_in_1us);
return -EINVAL;
}
err = ufshcd_dme_get(hba, UIC_ARG_MIB(PA_VS_CORE_CLK_40NS_CYCLES), ®);
if (err)
return err;
reg &= ~PA_VS_CORE_CLK_40NS_CYCLES_MASK;
reg |= cycles_in_40ns;
return ufshcd_dme_set(hba, UIC_ARG_MIB(PA_VS_CORE_CLK_40NS_CYCLES), reg);
}
static int ufs_qcom_set_core_clk_ctrl(struct ufs_hba *hba, bool is_scale_up, unsigned long freq)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
struct list_head *head = &hba->clk_list_head;
struct ufs_clk_info *clki;
u32 cycles_in_1us = 0 ;
u32 core_clk_ctrl_reg;
unsigned long clk_freq;
int err;
if (hba->use_pm_opp && freq != ULONG_MAX) {
clk_freq = ufs_qcom_opp_freq_to_clk_freq(hba, freq, "core_clk_unipro" );
if (clk_freq) {
cycles_in_1us = ceil(clk_freq, HZ_PER_MHZ);
goto set_core_clk_ctrl;
}
}
list_for_each_entry(clki, head, list) {
if (!IS_ERR_OR_NULL(clki->clk) &&
!strcmp(clki->name, "core_clk_unipro" )) {
if (!clki->max_freq) {
cycles_in_1us = 150 ; /* default for backwards compatibility */
break ;
}
if (freq == ULONG_MAX) {
cycles_in_1us = ceil(clki->max_freq, HZ_PER_MHZ);
break ;
}
if (is_scale_up)
cycles_in_1us = ceil(clki->max_freq, HZ_PER_MHZ);
else
cycles_in_1us = ceil(clk_get_rate(clki->clk), HZ_PER_MHZ);
break ;
}
}
set_core_clk_ctrl:
err = ufshcd_dme_get(hba,
UIC_ARG_MIB(DME_VS_CORE_CLK_CTRL),
&core_clk_ctrl_reg);
if (err)
return err;
/* Bit mask is different for UFS host controller V4.0.0 onwards */
if (host->hw_ver.major >= 4 ) {
if (!FIELD_FIT(CLK_1US_CYCLES_MASK_V4, cycles_in_1us))
return -ERANGE;
core_clk_ctrl_reg &= ~CLK_1US_CYCLES_MASK_V4;
core_clk_ctrl_reg |= FIELD_PREP(CLK_1US_CYCLES_MASK_V4, cycles_in_1us);
} else {
if (!FIELD_FIT(CLK_1US_CYCLES_MASK, cycles_in_1us))
return -ERANGE;
core_clk_ctrl_reg &= ~CLK_1US_CYCLES_MASK;
core_clk_ctrl_reg |= FIELD_PREP(CLK_1US_CYCLES_MASK, cycles_in_1us);
}
/* Clear CORE_CLK_DIV_EN */
core_clk_ctrl_reg &= ~DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT;
err = ufshcd_dme_set(hba,
UIC_ARG_MIB(DME_VS_CORE_CLK_CTRL),
core_clk_ctrl_reg);
if (err)
return err;
/* Configure unipro core clk 40ns attribute */
return ufs_qcom_set_clk_40ns_cycles(hba, cycles_in_1us);
}
static int ufs_qcom_clk_scale_up_pre_change(struct ufs_hba *hba, unsigned long freq)
{
int ret;
ret = ufs_qcom_cfg_timers(hba, true , freq);
if (ret) {
dev_err(hba->dev, "%s ufs cfg timer failed\n" , __func__);
return ret;
}
/* set unipro core clock attributes and clear clock divider */
return ufs_qcom_set_core_clk_ctrl(hba, true , freq);
}
static int ufs_qcom_clk_scale_up_post_change(struct ufs_hba *hba)
{
return 0 ;
}
static int ufs_qcom_clk_scale_down_pre_change(struct ufs_hba *hba)
{
int err;
u32 core_clk_ctrl_reg;
err = ufshcd_dme_get(hba,
UIC_ARG_MIB(DME_VS_CORE_CLK_CTRL),
&core_clk_ctrl_reg);
/* make sure CORE_CLK_DIV_EN is cleared */
if (!err &&
(core_clk_ctrl_reg & DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT)) {
core_clk_ctrl_reg &= ~DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT;
err = ufshcd_dme_set(hba,
UIC_ARG_MIB(DME_VS_CORE_CLK_CTRL),
core_clk_ctrl_reg);
}
return err;
}
static int ufs_qcom_clk_scale_down_post_change(struct ufs_hba *hba, unsigned long freq)
{
int ret;
ret = ufs_qcom_cfg_timers(hba, false , freq);
if (ret) {
dev_err(hba->dev, "%s: ufs_qcom_cfg_timers() failed\n" , __func__);
return ret;
}
/* set unipro core clock attributes and clear clock divider */
return ufs_qcom_set_core_clk_ctrl(hba, false , freq);
}
static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba, bool scale_up,
unsigned long target_freq,
enum ufs_notify_change_status status)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
int err;
/* check the host controller state before sending hibern8 cmd */
if (!ufshcd_is_hba_active(hba))
return 0 ;
if (status == PRE_CHANGE) {
err = ufshcd_uic_hibern8_enter(hba);
if (err)
return err;
if (scale_up)
err = ufs_qcom_clk_scale_up_pre_change(hba, target_freq);
else
err = ufs_qcom_clk_scale_down_pre_change(hba);
if (err) {
ufshcd_uic_hibern8_exit(hba);
return err;
}
} else {
if (scale_up)
err = ufs_qcom_clk_scale_up_post_change(hba);
else
err = ufs_qcom_clk_scale_down_post_change(hba, target_freq);
if (err) {
ufshcd_uic_hibern8_exit(hba);
return err;
}
ufs_qcom_icc_update_bw(host);
ufshcd_uic_hibern8_exit(hba);
}
return 0 ;
}
static void ufs_qcom_enable_test_bus(struct ufs_qcom_host *host)
{
ufshcd_rmwl(host->hba, UFS_REG_TEST_BUS_EN,
UFS_REG_TEST_BUS_EN, REG_UFS_CFG1);
ufshcd_rmwl(host->hba, TEST_BUS_EN, TEST_BUS_EN, REG_UFS_CFG1);
}
static void ufs_qcom_get_default_testbus_cfg(struct ufs_qcom_host *host)
{
/* provide a legal default configuration */
host->testbus.select_major = TSTBUS_UNIPRO;
host->testbus.select_minor = 37 ;
}
static bool ufs_qcom_testbus_cfg_is_ok(struct ufs_qcom_host *host)
{
if (host->testbus.select_major >= TSTBUS_MAX) {
dev_err(host->hba->dev,
"%s: UFS_CFG1[TEST_BUS_SEL} may not equal 0x%05X\n" ,
__func__, host->testbus.select_major);
return false ;
}
return true ;
}
int ufs_qcom_testbus_config(struct ufs_qcom_host *host)
{
int reg;
int offset;
u32 mask = TEST_BUS_SUB_SEL_MASK;
if (!host)
return -EINVAL;
if (!ufs_qcom_testbus_cfg_is_ok(host))
return -EPERM;
switch (host->testbus.select_major) {
case TSTBUS_UAWM:
reg = UFS_TEST_BUS_CTRL_0;
offset = 24 ;
break ;
case TSTBUS_UARM:
reg = UFS_TEST_BUS_CTRL_0;
offset = 16 ;
break ;
case TSTBUS_TXUC:
reg = UFS_TEST_BUS_CTRL_0;
offset = 8 ;
break ;
case TSTBUS_RXUC:
reg = UFS_TEST_BUS_CTRL_0;
offset = 0 ;
break ;
case TSTBUS_DFC:
reg = UFS_TEST_BUS_CTRL_1;
offset = 24 ;
break ;
case TSTBUS_TRLUT:
reg = UFS_TEST_BUS_CTRL_1;
offset = 16 ;
break ;
case TSTBUS_TMRLUT:
reg = UFS_TEST_BUS_CTRL_1;
offset = 8 ;
break ;
case TSTBUS_OCSC:
reg = UFS_TEST_BUS_CTRL_1;
offset = 0 ;
break ;
case TSTBUS_WRAPPER:
reg = UFS_TEST_BUS_CTRL_2;
offset = 16 ;
break ;
case TSTBUS_COMBINED:
reg = UFS_TEST_BUS_CTRL_2;
offset = 8 ;
break ;
case TSTBUS_UTP_HCI:
reg = UFS_TEST_BUS_CTRL_2;
offset = 0 ;
break ;
case TSTBUS_UNIPRO:
reg = UFS_UNIPRO_CFG;
offset = 20 ;
mask = 0 xFFF;
break ;
/*
* No need for a default case , since
* ufs_qcom_testbus_cfg_is_ok ( ) checks that the configuration
* is legal
*/
}
mask <<= offset;
ufshcd_rmwl(host->hba, TEST_BUS_SEL,
(u32)host->testbus.select_major << 19 ,
REG_UFS_CFG1);
ufshcd_rmwl(host->hba, mask,
(u32)host->testbus.select_minor << offset,
reg);
ufs_qcom_enable_test_bus(host);
return 0 ;
}
static void ufs_qcom_dump_testbus(struct ufs_hba *hba)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
int i, j, nminor = 0 , testbus_len = 0 ;
u32 *testbus __free(kfree) = NULL;
char *prefix;
testbus = kmalloc_array(256 , sizeof (u32), GFP_KERNEL);
if (!testbus)
return ;
for (j = 0 ; j < TSTBUS_MAX; j++) {
nminor = testbus_info[j].nminor;
prefix = testbus_info[j].prefix;
host->testbus.select_major = j;
testbus_len = nminor * sizeof (u32);
for (i = 0 ; i < nminor; i++) {
host->testbus.select_minor = i;
ufs_qcom_testbus_config(host);
testbus[i] = ufshcd_readl(hba, UFS_TEST_BUS);
}
print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET,
16 , 4 , testbus, testbus_len, false );
}
}
static int ufs_qcom_dump_regs(struct ufs_hba *hba, size_t offset, size_t len,
const char *prefix, enum ufshcd_res id)
{
u32 *regs __free(kfree) = NULL;
size_t pos;
if (offset % 4 != 0 || len % 4 != 0 )
return -EINVAL;
regs = kzalloc(len, GFP_ATOMIC);
if (!regs)
return -ENOMEM;
for (pos = 0 ; pos < len; pos += 4 )
regs[pos / 4 ] = readl(hba->res[id].base + offset + pos);
print_hex_dump(KERN_ERR, prefix,
len > 4 ? DUMP_PREFIX_OFFSET : DUMP_PREFIX_NONE,
16 , 4 , regs, len, false );
return 0 ;
}
static void ufs_qcom_dump_mcq_hci_regs(struct ufs_hba *hba)
{
struct dump_info {
size_t offset;
size_t len;
const char *prefix;
enum ufshcd_res id;
};
struct dump_info mcq_dumps[] = {
{0 x0, 256 * 4 , "MCQ HCI-0 " , RES_MCQ},
{0 x400, 256 * 4 , "MCQ HCI-1 " , RES_MCQ},
{0 x0, 5 * 4 , "MCQ VS-0 " , RES_MCQ_VS},
{0 x0, 256 * 4 , "MCQ SQD-0 " , RES_MCQ_SQD},
{0 x400, 256 * 4 , "MCQ SQD-1 " , RES_MCQ_SQD},
{0 x800, 256 * 4 , "MCQ SQD-2 " , RES_MCQ_SQD},
{0 xc00, 256 * 4 , "MCQ SQD-3 " , RES_MCQ_SQD},
{0 x1000, 256 * 4 , "MCQ SQD-4 " , RES_MCQ_SQD},
{0 x1400, 256 * 4 , "MCQ SQD-5 " , RES_MCQ_SQD},
{0 x1800, 256 * 4 , "MCQ SQD-6 " , RES_MCQ_SQD},
{0 x1c00, 256 * 4 , "MCQ SQD-7 " , RES_MCQ_SQD},
};
for (int i = 0 ; i < ARRAY_SIZE(mcq_dumps); i++) {
ufs_qcom_dump_regs(hba, mcq_dumps[i].offset, mcq_dumps[i].len,
mcq_dumps[i].prefix, mcq_dumps[i].id);
cond_resched();
}
}
static void ufs_qcom_dump_dbg_regs(struct ufs_hba *hba)
{
u32 reg;
struct ufs_qcom_host *host;
host = ufshcd_get_variant(hba);
dev_err(hba->dev, "HW_H8_ENTER_CNT=%d\n" , ufshcd_readl(hba, REG_UFS_HW_H8_ENTER_CNT));
dev_err(hba->dev, "HW_H8_EXIT_CNT=%d\n" , ufshcd_readl(hba, REG_UFS_HW_H8_EXIT_CNT));
dev_err(hba->dev, "SW_H8_ENTER_CNT=%d\n" , ufshcd_readl(hba, REG_UFS_SW_H8_ENTER_CNT));
dev_err(hba->dev, "SW_H8_EXIT_CNT=%d\n" , ufshcd_readl(hba, REG_UFS_SW_H8_EXIT_CNT));
dev_err(hba->dev, "SW_AFTER_HW_H8_ENTER_CNT=%d\n" ,
ufshcd_readl(hba, REG_UFS_SW_AFTER_HW_H8_ENTER_CNT));
ufshcd_dump_regs(hba, REG_UFS_SYS1CLK_1US, 16 * 4 ,
"HCI Vendor Specific Registers " );
reg = ufs_qcom_get_debug_reg_offset(host, UFS_UFS_DBG_RD_REG_OCSC);
ufshcd_dump_regs(hba, reg, 44 * 4 , "UFS_UFS_DBG_RD_REG_OCSC " );
reg = ufshcd_readl(hba, REG_UFS_CFG1);
reg |= UTP_DBG_RAMS_EN;
ufshcd_writel(hba, reg, REG_UFS_CFG1);
reg = ufs_qcom_get_debug_reg_offset(host, UFS_UFS_DBG_RD_EDTL_RAM);
ufshcd_dump_regs(hba, reg, 32 * 4 , "UFS_UFS_DBG_RD_EDTL_RAM " );
reg = ufs_qcom_get_debug_reg_offset(host, UFS_UFS_DBG_RD_DESC_RAM);
ufshcd_dump_regs(hba, reg, 128 * 4 , "UFS_UFS_DBG_RD_DESC_RAM " );
reg = ufs_qcom_get_debug_reg_offset(host, UFS_UFS_DBG_RD_PRDT_RAM);
ufshcd_dump_regs(hba, reg, 64 * 4 , "UFS_UFS_DBG_RD_PRDT_RAM " );
/* clear bit 17 - UTP_DBG_RAMS_EN */
ufshcd_rmwl(hba, UTP_DBG_RAMS_EN, 0 , REG_UFS_CFG1);
reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_UAWM);
ufshcd_dump_regs(hba, reg, 4 * 4 , "UFS_DBG_RD_REG_UAWM " );
reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_UARM);
ufshcd_dump_regs(hba, reg, 4 * 4 , "UFS_DBG_RD_REG_UARM " );
reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_TXUC);
ufshcd_dump_regs(hba, reg, 48 * 4 , "UFS_DBG_RD_REG_TXUC " );
reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_RXUC);
ufshcd_dump_regs(hba, reg, 27 * 4 , "UFS_DBG_RD_REG_RXUC " );
reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_DFC);
ufshcd_dump_regs(hba, reg, 19 * 4 , "UFS_DBG_RD_REG_DFC " );
reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_TRLUT);
ufshcd_dump_regs(hba, reg, 34 * 4 , "UFS_DBG_RD_REG_TRLUT " );
reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_TMRLUT);
ufshcd_dump_regs(hba, reg, 9 * 4 , "UFS_DBG_RD_REG_TMRLUT " );
if (hba->mcq_enabled) {
reg = ufs_qcom_get_debug_reg_offset(host, UFS_RD_REG_MCQ);
ufshcd_dump_regs(hba, reg, 64 * 4 , "HCI MCQ Debug Registers " );
}
/* ensure below dumps occur only in task context due to blocking calls. */
if (in_task()) {
/* Dump MCQ Host Vendor Specific Registers */
if (hba->mcq_enabled)
ufs_qcom_dump_mcq_hci_regs(hba);
/* voluntarily yield the CPU as we are dumping too much data */
ufshcd_dump_regs(hba, UFS_TEST_BUS, 4 , "UFS_TEST_BUS " );
cond_resched();
ufs_qcom_dump_testbus(hba);
}
}
/**
* ufs_qcom_device_reset ( ) - toggle the ( optional ) device reset line
* @ hba : per - adapter instance
*
* Toggles the ( optional ) reset line to reset the attached device .
*/
static int ufs_qcom_device_reset(struct ufs_hba *hba)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
/* reset gpio is optional */
if (!host->device_reset)
return -EOPNOTSUPP;
/*
* The UFS device shall detect reset pulses of 1 us , sleep for 10 us to
* be on the safe side .
*/
ufs_qcom_device_reset_ctrl(hba, true );
usleep_range(10 , 15 );
ufs_qcom_device_reset_ctrl(hba, false );
usleep_range(10 , 15 );
return 0 ;
}
static void ufs_qcom_config_scaling_param(struct ufs_hba *hba,
struct devfreq_dev_profile *p,
struct devfreq_simple_ondemand_data *d)
{
p->polling_ms = 60 ;
p->timer = DEVFREQ_TIMER_DELAYED;
d->upthreshold = 70 ;
d->downdifferential = 5 ;
hba->clk_scaling.suspend_on_no_request = true ;
}
/* Resources */
static const struct ufshcd_res_info ufs_res_info[RES_MAX] = {
{.name = "ufs_mem" ,},
{.name = "mcq" ,},
/* Submission Queue DAO */
{.name = "mcq_sqd" ,},
/* Submission Queue Interrupt Status */
{.name = "mcq_sqis" ,},
/* Completion Queue DAO */
{.name = "mcq_cqd" ,},
/* Completion Queue Interrupt Status */
{.name = "mcq_cqis" ,},
/* MCQ vendor specific */
{.name = "mcq_vs" ,},
};
static int ufs_qcom_mcq_config_resource(struct ufs_hba *hba)
{
struct platform_device *pdev = to_platform_device(hba->dev);
struct ufshcd_res_info *res;
struct resource *res_mem, *res_mcq;
int i, ret;
memcpy(hba->res, ufs_res_info, sizeof (ufs_res_info));
for (i = 0 ; i < RES_MAX; i++) {
res = &hba->res[i];
res->resource = platform_get_resource_byname(pdev,
IORESOURCE_MEM,
res->name);
if (!res->resource) {
dev_info(hba->dev, "Resource %s not provided\n" , res->name);
if (i == RES_UFS)
return -ENODEV;
continue ;
} else if (i == RES_UFS) {
res_mem = res->resource;
res->base = hba->mmio_base;
continue ;
}
res->base = devm_ioremap_resource(hba->dev, res->resource);
if (IS_ERR(res->base)) {
dev_err(hba->dev, "Failed to map res %s, err=%d\n" ,
res->name, (int )PTR_ERR(res->base));
ret = PTR_ERR(res->base);
res->base = NULL;
return ret;
}
}
/* MCQ resource provided in DT */
res = &hba->res[RES_MCQ];
/* Bail if MCQ resource is provided */
if (res->base)
goto out;
/* Explicitly allocate MCQ resource from ufs_mem */
res_mcq = devm_kzalloc(hba->dev, sizeof (*res_mcq), GFP_KERNEL);
if (!res_mcq)
return -ENOMEM;
res_mcq->start = res_mem->start +
MCQ_SQATTR_OFFSET(hba->mcq_capabilities);
res_mcq->end = res_mcq->start + hba->nr_hw_queues * MCQ_QCFG_SIZE - 1 ;
res_mcq->flags = res_mem->flags;
res_mcq->name = "mcq" ;
ret = insert_resource(&iomem_resource, res_mcq);
if (ret) {
dev_err(hba->dev, "Failed to insert MCQ resource, err=%d\n" ,
ret);
return ret;
}
res->base = devm_ioremap_resource(hba->dev, res_mcq);
if (IS_ERR(res->base)) {
dev_err(hba->dev, "MCQ registers mapping failed, err=%d\n" ,
(int )PTR_ERR(res->base));
ret = PTR_ERR(res->base);
goto ioremap_err;
}
out:
hba->mcq_base = res->base;
return 0 ;
ioremap_err:
res->base = NULL;
remove_resource(res_mcq);
return ret;
}
static int ufs_qcom_op_runtime_config(struct ufs_hba *hba)
{
struct ufshcd_res_info *mem_res, *sqdao_res;
struct ufshcd_mcq_opr_info_t *opr;
int i;
mem_res = &hba->res[RES_UFS];
sqdao_res = &hba->res[RES_MCQ_SQD];
if (!mem_res->base || !sqdao_res->base)
return -EINVAL;
for (i = 0 ; i < OPR_MAX; i++) {
opr = &hba->mcq_opr[i];
opr->offset = sqdao_res->resource->start -
mem_res->resource->start + 0 x40 * i;
opr->stride = 0 x100;
opr->base = sqdao_res->base + 0 x40 * i;
}
return 0 ;
}
static int ufs_qcom_get_hba_mac(struct ufs_hba *hba)
{
/* Qualcomm HC supports up to 64 */
return MAX_SUPP_MAC;
}
static int ufs_qcom_get_outstanding_cqs(struct ufs_hba *hba,
unsigned long *ocqs)
{
struct ufshcd_res_info *mcq_vs_res = &hba->res[RES_MCQ_VS];
if (!mcq_vs_res->base)
return -EINVAL;
*ocqs = readl(mcq_vs_res->base + UFS_MEM_CQIS_VS);
return 0 ;
}
static void ufs_qcom_write_msi_msg(struct msi_desc *desc, struct msi_msg *msg)
{
struct device *dev = msi_desc_to_dev(desc);
struct ufs_hba *hba = dev_get_drvdata(dev);
ufshcd_mcq_config_esi(hba, msg);
}
struct ufs_qcom_irq {
unsigned int irq;
unsigned int idx;
struct ufs_hba *hba;
};
static irqreturn_t ufs_qcom_mcq_esi_handler(int irq, void *data)
{
struct ufs_qcom_irq *qi = data;
struct ufs_hba *hba = qi->hba;
struct ufs_hw_queue *hwq = &hba->uhq[qi->idx];
ufshcd_mcq_write_cqis(hba, 0 x1, qi->idx);
ufshcd_mcq_poll_cqe_lock(hba, hwq);
return IRQ_HANDLED;
}
static int ufs_qcom_config_esi(struct ufs_hba *hba)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
int nr_irqs, ret;
if (host->esi_enabled)
return 0 ;
/*
* 1 . We only handle CQs as of now .
* 2 . Poll queues do not need ESI .
*/
nr_irqs = hba->nr_hw_queues - hba->nr_queues[HCTX_TYPE_POLL];
ret = platform_device_msi_init_and_alloc_irqs(hba->dev, nr_irqs,
ufs_qcom_write_msi_msg);
if (ret) {
dev_warn(hba->dev, "Platform MSI not supported or failed, continuing without ESI\n" );
return ret; /* Continue without ESI */
}
struct ufs_qcom_irq *qi = devm_kcalloc(hba->dev, nr_irqs, sizeof (*qi), GFP_KERNEL);
if (!qi) {
platform_device_msi_free_irqs_all(hba->dev);
return -ENOMEM;
}
for (int idx = 0 ; idx < nr_irqs; idx++) {
qi[idx].irq = msi_get_virq(hba->dev, idx);
qi[idx].idx = idx;
qi[idx].hba = hba;
ret = devm_request_irq(hba->dev, qi[idx].irq, ufs_qcom_mcq_esi_handler,
IRQF_SHARED, "qcom-mcq-esi" , qi + idx);
if (ret) {
dev_err(hba->dev, "%s: Failed to request IRQ for %d, err = %d\n" ,
__func__, qi[idx].irq, ret);
/* Free previously allocated IRQs */
for (int j = 0 ; j < idx; j++)
devm_free_irq(hba->dev, qi[j].irq, qi + j);
platform_device_msi_free_irqs_all(hba->dev);
devm_kfree(hba->dev, qi);
return ret;
}
}
if (host->hw_ver.major >= 6 ) {
ufshcd_rmwl(hba, ESI_VEC_MASK, FIELD_PREP(ESI_VEC_MASK, MAX_ESI_VEC - 1 ),
REG_UFS_CFG3);
}
ufshcd_mcq_enable_esi(hba);
host->esi_enabled = true ;
return 0 ;
}
static unsigned long ufs_qcom_opp_freq_to_clk_freq(struct ufs_hba *hba,
unsigned long freq, char *name)
{
struct ufs_clk_info *clki;
struct dev_pm_opp *opp;
unsigned long clk_freq;
int idx = 0 ;
bool found = false ;
opp = dev_pm_opp_find_freq_exact_indexed(hba->dev, freq, 0 , true );
if (IS_ERR(opp)) {
dev_err(hba->dev, "Failed to find OPP for exact frequency %lu\n" , freq);
return 0 ;
}
list_for_each_entry(clki, &hba->clk_list_head, list) {
if (!strcmp(clki->name, name)) {
found = true ;
break ;
}
idx++;
}
if (!found) {
dev_err(hba->dev, "Failed to find clock '%s' in clk list\n" , name);
dev_pm_opp_put(opp);
return 0 ;
}
clk_freq = dev_pm_opp_get_freq_indexed(opp, idx);
dev_pm_opp_put(opp);
return clk_freq;
}
static u32 ufs_qcom_freq_to_gear_speed(struct ufs_hba *hba, unsigned long freq)
{
u32 gear = UFS_HS_DONT_CHANGE;
unsigned long unipro_freq;
if (!hba->use_pm_opp)
return gear;
unipro_freq = ufs_qcom_opp_freq_to_clk_freq(hba, freq, "core_clk_unipro" );
switch (unipro_freq) {
case 403000000 :
gear = UFS_HS_G5;
break ;
case 300000000 :
gear = UFS_HS_G4;
break ;
case 201500000 :
gear = UFS_HS_G3;
break ;
case 150000000 :
case 100000000 :
gear = UFS_HS_G2;
break ;
case 75000000 :
case 37500000 :
gear = UFS_HS_G1;
break ;
default :
dev_err(hba->dev, "%s: Unsupported clock freq : %lu\n" , __func__, freq);
return UFS_HS_DONT_CHANGE;
}
return min_t(u32, gear, hba->max_pwr_info.info.gear_rx);
}
/*
* struct ufs_hba_qcom_vops - UFS QCOM specific variant operations
*
* The variant operations configure the necessary controller and PHY
* handshake during initialization .
*/
static const struct ufs_hba_variant_ops ufs_hba_qcom_vops = {
.name = "qcom" ,
.init = ufs_qcom_init,
.exit = ufs_qcom_exit,
.get_ufs_hci_version = ufs_qcom_get_ufs_hci_version,
.clk_scale_notify = ufs_qcom_clk_scale_notify,
.setup_clocks = ufs_qcom_setup_clocks,
.hce_enable_notify = ufs_qcom_hce_enable_notify,
.link_startup_notify = ufs_qcom_link_startup_notify,
.pwr_change_notify = ufs_qcom_pwr_change_notify,
.apply_dev_quirks = ufs_qcom_apply_dev_quirks,
.fixup_dev_quirks = ufs_qcom_fixup_dev_quirks,
.suspend = ufs_qcom_suspend,
.resume = ufs_qcom_resume,
.dbg_register_dump = ufs_qcom_dump_dbg_regs,
.device_reset = ufs_qcom_device_reset,
.config_scaling_param = ufs_qcom_config_scaling_param,
.mcq_config_resource = ufs_qcom_mcq_config_resource,
.get_hba_mac = ufs_qcom_get_hba_mac,
.op_runtime_config = ufs_qcom_op_runtime_config,
.get_outstanding_cqs = ufs_qcom_get_outstanding_cqs,
.config_esi = ufs_qcom_config_esi,
.freq_to_gear_speed = ufs_qcom_freq_to_gear_speed,
};
/**
* ufs_qcom_probe - probe routine of the driver
* @ pdev : pointer to Platform device handle
*
* Return : zero for success and non - zero for failure .
*/
static int ufs_qcom_probe(struct platform_device *pdev)
{
int err;
struct device *dev = &pdev->dev;
/* Perform generic probe */
err = ufshcd_pltfrm_init(pdev, &ufs_hba_qcom_vops);
if (err)
return dev_err_probe(dev, err, "ufshcd_pltfrm_init() failed\n" );
return 0 ;
}
/**
* ufs_qcom_remove - set driver_data of the device to NULL
* @ pdev : pointer to platform device handle
*
* Always returns 0
*/
static void ufs_qcom_remove(struct platform_device *pdev)
{
struct ufs_hba *hba = platform_get_drvdata(pdev);
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
ufshcd_pltfrm_remove(pdev);
if (host->esi_enabled)
platform_device_msi_free_irqs_all(hba->dev);
}
static const struct ufs_qcom_drvdata ufs_qcom_sm8550_drvdata = {
.quirks = UFSHCD_QUIRK_BROKEN_LSDBS_CAP,
.no_phy_retention = true ,
};
static const struct of_device_id ufs_qcom_of_match[] __maybe_unused = {
{ .compatible = "qcom,ufshc" },
{ .compatible = "qcom,sm8550-ufshc" , .data = &ufs_qcom_sm8550_drvdata },
{ .compatible = "qcom,sm8650-ufshc" , .data = &ufs_qcom_sm8550_drvdata },
{},
};
MODULE_DEVICE_TABLE(of, ufs_qcom_of_match);
#ifdef CONFIG_ACPI
static const struct acpi_device_id ufs_qcom_acpi_match[] = {
{ "QCOM24A5" },
{ },
};
MODULE_DEVICE_TABLE(acpi, ufs_qcom_acpi_match);
#endif
static const struct dev_pm_ops ufs_qcom_pm_ops = {
SET_RUNTIME_PM_OPS(ufshcd_runtime_suspend, ufshcd_runtime_resume, NULL)
.prepare = ufshcd_suspend_prepare,
.complete = ufshcd_resume_complete,
#ifdef CONFIG_PM_SLEEP
.suspend = ufshcd_system_suspend,
.resume = ufshcd_system_resume,
.freeze = ufshcd_system_freeze,
.restore = ufshcd_system_restore,
.thaw = ufshcd_system_thaw,
#endif
};
static struct platform_driver ufs_qcom_pltform = {
.probe = ufs_qcom_probe,
.remove = ufs_qcom_remove,
.driver = {
.name = "ufshcd-qcom" ,
.pm = &ufs_qcom_pm_ops,
.of_match_table = of_match_ptr(ufs_qcom_of_match),
.acpi_match_table = ACPI_PTR(ufs_qcom_acpi_match),
},
};
module_platform_driver(ufs_qcom_pltform);
MODULE_DESCRIPTION("Qualcomm UFS host controller driver" );
MODULE_LICENSE("GPL v2" );
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