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linux-sg2042/drivers/scsi/ufs/ufs-qcom.c

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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2013-2016, Linux Foundation. All rights reserved.
*/
#include <linux/acpi.h>
#include <linux/time.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/phy/phy.h>
#include <linux/gpio/consumer.h>
#include <linux/reset-controller.h>
#include "ufshcd.h"
#include "ufshcd-pltfrm.h"
#include "unipro.h"
#include "ufs-qcom.h"
#include "ufshci.h"
#include "ufs_quirks.h"
#define UFS_QCOM_DEFAULT_DBG_PRINT_EN \
(UFS_QCOM_DBG_PRINT_REGS_EN | UFS_QCOM_DBG_PRINT_TEST_BUS_EN)
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,
};
static struct ufs_qcom_host *ufs_qcom_hosts[MAX_UFS_QCOM_HOSTS];
static int ufs_qcom_set_bus_vote(struct ufs_qcom_host *host, int vote);
static void ufs_qcom_get_default_testbus_cfg(struct ufs_qcom_host *host);
static int ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(struct ufs_hba *hba,
u32 clk_cycles);
static struct ufs_qcom_host *rcdev_to_ufs_host(struct reset_controller_dev *rcd)
{
return container_of(rcd, struct ufs_qcom_host, rcdev);
}
static void ufs_qcom_dump_regs_wrapper(struct ufs_hba *hba, int offset, int len,
const char *prefix, void *priv)
{
ufshcd_dump_regs(hba, offset, len * 4, prefix);
}
static int ufs_qcom_get_connected_tx_lanes(struct ufs_hba *hba, u32 *tx_lanes)
{
int err = 0;
err = ufshcd_dme_get(hba,
UIC_ARG_MIB(PA_CONNECTEDTXDATALANES), tx_lanes);
if (err)
dev_err(hba->dev, "%s: couldn't read PA_CONNECTEDTXDATALANES %d\n",
__func__, err);
return err;
}
static int ufs_qcom_host_clk_get(struct device *dev,
const char *name, struct clk **clk_out, bool optional)
{
struct clk *clk;
int err = 0;
clk = devm_clk_get(dev, name);
if (!IS_ERR(clk)) {
*clk_out = clk;
return 0;
}
err = PTR_ERR(clk);
if (optional && err == -ENOENT) {
*clk_out = NULL;
return 0;
}
if (err != -EPROBE_DEFER)
dev_err(dev, "failed to get %s err %d\n", name, err);
return err;
}
static int ufs_qcom_host_clk_enable(struct device *dev,
const char *name, struct clk *clk)
{
int err = 0;
err = clk_prepare_enable(clk);
if (err)
dev_err(dev, "%s: %s enable failed %d\n", __func__, name, err);
return err;
}
static void ufs_qcom_disable_lane_clks(struct ufs_qcom_host *host)
{
if (!host->is_lane_clks_enabled)
return;
clk_disable_unprepare(host->tx_l1_sync_clk);
clk_disable_unprepare(host->tx_l0_sync_clk);
clk_disable_unprepare(host->rx_l1_sync_clk);
clk_disable_unprepare(host->rx_l0_sync_clk);
host->is_lane_clks_enabled = false;
}
static int ufs_qcom_enable_lane_clks(struct ufs_qcom_host *host)
{
int err = 0;
struct device *dev = host->hba->dev;
if (host->is_lane_clks_enabled)
return 0;
err = ufs_qcom_host_clk_enable(dev, "rx_lane0_sync_clk",
host->rx_l0_sync_clk);
if (err)
goto out;
err = ufs_qcom_host_clk_enable(dev, "tx_lane0_sync_clk",
host->tx_l0_sync_clk);
if (err)
goto disable_rx_l0;
err = ufs_qcom_host_clk_enable(dev, "rx_lane1_sync_clk",
host->rx_l1_sync_clk);
if (err)
goto disable_tx_l0;
err = ufs_qcom_host_clk_enable(dev, "tx_lane1_sync_clk",
host->tx_l1_sync_clk);
if (err)
goto disable_rx_l1;
host->is_lane_clks_enabled = true;
goto out;
disable_rx_l1:
clk_disable_unprepare(host->rx_l1_sync_clk);
disable_tx_l0:
clk_disable_unprepare(host->tx_l0_sync_clk);
disable_rx_l0:
clk_disable_unprepare(host->rx_l0_sync_clk);
out:
return err;
}
static int ufs_qcom_init_lane_clks(struct ufs_qcom_host *host)
{
int err = 0;
struct device *dev = host->hba->dev;
if (has_acpi_companion(dev))
return 0;
err = ufs_qcom_host_clk_get(dev, "rx_lane0_sync_clk",
&host->rx_l0_sync_clk, false);
if (err)
goto out;
err = ufs_qcom_host_clk_get(dev, "tx_lane0_sync_clk",
&host->tx_l0_sync_clk, false);
if (err)
goto out;
/* In case of single lane per direction, don't read lane1 clocks */
if (host->hba->lanes_per_direction > 1) {
err = ufs_qcom_host_clk_get(dev, "rx_lane1_sync_clk",
&host->rx_l1_sync_clk, false);
if (err)
goto out;
err = ufs_qcom_host_clk_get(dev, "tx_lane1_sync_clk",
&host->tx_l1_sync_clk, true);
}
out:
return err;
}
static int ufs_qcom_link_startup_post_change(struct ufs_hba *hba)
{
u32 tx_lanes;
return ufs_qcom_get_connected_tx_lanes(hba, &tx_lanes);
}
static int ufs_qcom_check_hibern8(struct ufs_hba *hba)
{
int err;
u32 tx_fsm_val = 0;
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,
ufs_qcom_cap_qunipro(host) ? QUNIPRO_SEL : 0,
REG_UFS_CFG1);
/* make sure above configuration is applied before we return */
mb();
}
/**
* ufs_qcom_host_reset - reset host controller and PHY
*/
static int ufs_qcom_host_reset(struct ufs_hba *hba)
{
int ret = 0;
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
if (!host->core_reset) {
dev_warn(hba->dev, "%s: reset control not set\n", __func__);
goto out;
}
ret = reset_control_assert(host->core_reset);
if (ret) {
dev_err(hba->dev, "%s: core_reset assert failed, err = %d\n",
__func__, ret);
goto out;
}
/*
* The hardware requirement for delay between assert/deassert
* is at least 3-4 sleep clock (32.7KHz) cycles, which comes to
* ~125us (4/32768). To be on the safe side add 200us 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);
usleep_range(1000, 1100);
out:
return ret;
}
static int ufs_qcom_power_up_sequence(struct ufs_hba *hba)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
struct phy *phy = host->generic_phy;
int ret = 0;
bool is_rate_B = (UFS_QCOM_LIMIT_HS_RATE == PA_HS_MODE_B)
? true : false;
/* Reset UFS Host Controller and PHY */
ret = ufs_qcom_host_reset(hba);
if (ret)
dev_warn(hba->dev, "%s: host reset returned %d\n",
__func__, ret);
if (is_rate_B)
phy_set_mode(phy, PHY_MODE_UFS_HS_B);
/* phy initialization - calibrate the phy */
ret = phy_init(phy);
if (ret) {
dev_err(hba->dev, "%s: phy init failed, ret = %d\n",
__func__, ret);
goto out;
}
/* 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;
}
ufs_qcom_select_unipro_mode(host);
return 0;
out_disable_phy:
phy_exit(phy);
out:
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)
{
ufshcd_writel(hba,
ufshcd_readl(hba, REG_UFS_CFG2) | REG_UFS_CFG2_CGC_EN_ALL,
REG_UFS_CFG2);
/* Ensure that HW clock gating is enabled before next operations */
mb();
}
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 = 0;
switch (status) {
case PRE_CHANGE:
ufs_qcom_power_up_sequence(hba);
/*
* 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);
break;
default:
dev_err(hba->dev, "%s: invalid status %d\n", __func__, status);
err = -EINVAL;
break;
}
return err;
}
/**
* Returns zero for success and non-zero in case of a failure
*/
static int ufs_qcom_cfg_timers(struct ufs_hba *hba, u32 gear,
u32 hs, u32 rate, bool update_link_startup_timer)
{
int ret = 0;
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
struct ufs_clk_info *clki;
u32 core_clk_period_in_ns;
u32 tx_clk_cycles_per_us = 0;
unsigned long core_clk_rate = 0;
u32 core_clk_cycles_per_us = 0;
static u32 pwm_fr_table[][2] = {
{UFS_PWM_G1, 0x1},
{UFS_PWM_G2, 0x1},
{UFS_PWM_G3, 0x1},
{UFS_PWM_G4, 0x1},
};
static u32 hs_fr_table_rA[][2] = {
{UFS_HS_G1, 0x1F},
{UFS_HS_G2, 0x3e},
{UFS_HS_G3, 0x7D},
};
static u32 hs_fr_table_rB[][2] = {
{UFS_HS_G1, 0x24},
{UFS_HS_G2, 0x49},
{UFS_HS_G3, 0x92},
};
/*
* The Qunipro controller does not use following registers:
* SYS1CLK_1US_REG, TX_SYMBOL_CLK_1US_REG, CLK_NS_REG &
* UFS_REG_PA_LINK_STARTUP_TIMER
* But UTP controller uses SYS1CLK_1US_REG register for Interrupt
* Aggregation logic.
*/
if (ufs_qcom_cap_qunipro(host) && !ufshcd_is_intr_aggr_allowed(hba))
goto out;
if (gear == 0) {
dev_err(hba->dev, "%s: invalid gear = %d\n", __func__, gear);
goto out_error;
}
list_for_each_entry(clki, &hba->clk_list_head, list) {
if (!strcmp(clki->name, "core_clk"))
core_clk_rate = clk_get_rate(clki->clk);
}
/* If frequency is smaller than 1MHz, set to 1MHz */
if (core_clk_rate < DEFAULT_CLK_RATE_HZ)
core_clk_rate = DEFAULT_CLK_RATE_HZ;
core_clk_cycles_per_us = core_clk_rate / 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.
*/
mb();
}
if (ufs_qcom_cap_qunipro(host))
goto out;
core_clk_period_in_ns = NSEC_PER_SEC / core_clk_rate;
core_clk_period_in_ns <<= OFFSET_CLK_NS_REG;
core_clk_period_in_ns &= MASK_CLK_NS_REG;
switch (hs) {
case FASTAUTO_MODE:
case FAST_MODE:
if (rate == PA_HS_MODE_A) {
if (gear > ARRAY_SIZE(hs_fr_table_rA)) {
dev_err(hba->dev,
"%s: index %d exceeds table size %zu\n",
__func__, gear,
ARRAY_SIZE(hs_fr_table_rA));
goto out_error;
}
tx_clk_cycles_per_us = hs_fr_table_rA[gear-1][1];
} else if (rate == PA_HS_MODE_B) {
if (gear > ARRAY_SIZE(hs_fr_table_rB)) {
dev_err(hba->dev,
"%s: index %d exceeds table size %zu\n",
__func__, gear,
ARRAY_SIZE(hs_fr_table_rB));
goto out_error;
}
tx_clk_cycles_per_us = hs_fr_table_rB[gear-1][1];
} else {
dev_err(hba->dev, "%s: invalid rate = %d\n",
__func__, rate);
goto out_error;
}
break;
case SLOWAUTO_MODE:
case SLOW_MODE:
if (gear > ARRAY_SIZE(pwm_fr_table)) {
dev_err(hba->dev,
"%s: index %d exceeds table size %zu\n",
__func__, gear,
ARRAY_SIZE(pwm_fr_table));
goto out_error;
}
tx_clk_cycles_per_us = pwm_fr_table[gear-1][1];
break;
case UNCHANGED:
default:
dev_err(hba->dev, "%s: invalid mode = %d\n", __func__, hs);
goto out_error;
}
if (ufshcd_readl(hba, REG_UFS_TX_SYMBOL_CLK_NS_US) !=
(core_clk_period_in_ns | tx_clk_cycles_per_us)) {
/* this register 2 fields shall be written at once */
ufshcd_writel(hba, core_clk_period_in_ns | tx_clk_cycles_per_us,
REG_UFS_TX_SYMBOL_CLK_NS_US);
/*
* make sure above write gets applied before we return from
* this function.
*/
mb();
}
if (update_link_startup_timer) {
ufshcd_writel(hba, ((core_clk_rate / MSEC_PER_SEC) * 100),
REG_UFS_PA_LINK_STARTUP_TIMER);
/*
* make sure that this configuration is applied before
* we return
*/
mb();
}
goto out;
out_error:
ret = -EINVAL;
out:
return ret;
}
static int ufs_qcom_link_startup_notify(struct ufs_hba *hba,
enum ufs_notify_change_status status)
{
int err = 0;
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
switch (status) {
case PRE_CHANGE:
if (ufs_qcom_cfg_timers(hba, UFS_PWM_G1, SLOWAUTO_MODE,
0, true)) {
dev_err(hba->dev, "%s: ufs_qcom_cfg_timers() failed\n",
__func__);
err = -EINVAL;
goto out;
}
if (ufs_qcom_cap_qunipro(host))
/*
* set unipro core clock cycles to 150 & clear clock
* divider
*/
err = ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(hba,
150);
/*
* 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.
*/
if (ufshcd_get_local_unipro_ver(hba) != UFS_UNIPRO_VER_1_41)
err = ufshcd_dme_set(hba,
UIC_ARG_MIB(PA_LOCAL_TX_LCC_ENABLE),
0);
break;
case POST_CHANGE:
ufs_qcom_link_startup_post_change(hba);
break;
default:
break;
}
out:
return err;
}
static int ufs_qcom_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
struct phy *phy = host->generic_phy;
int ret = 0;
if (ufs_qcom_is_link_off(hba)) {
/*
* Disable the tx/rx lane symbol clocks before PHY is
* powered down as the PLL source should be disabled
* after downstream clocks are disabled.
*/
ufs_qcom_disable_lane_clks(host);
phy_power_off(phy);
} else if (!ufs_qcom_is_link_active(hba)) {
ufs_qcom_disable_lane_clks(host);
}
return ret;
}
static int ufs_qcom_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
struct phy *phy = host->generic_phy;
int err;
if (ufs_qcom_is_link_off(hba)) {
err = phy_power_on(phy);
if (err) {
dev_err(hba->dev, "%s: failed PHY power on: %d\n",
__func__, err);
return err;
}
err = ufs_qcom_enable_lane_clks(host);
if (err)
return err;
} else if (!ufs_qcom_is_link_active(hba)) {
err = ufs_qcom_enable_lane_clks(host);
if (err)
return err;
}
hba->is_sys_suspended = false;
return 0;
}
#ifdef CONFIG_MSM_BUS_SCALING
static int ufs_qcom_get_bus_vote(struct ufs_qcom_host *host,
const char *speed_mode)
{
struct device *dev = host->hba->dev;
struct device_node *np = dev->of_node;
int err;
const char *key = "qcom,bus-vector-names";
if (!speed_mode) {
err = -EINVAL;
goto out;
}
if (host->bus_vote.is_max_bw_needed && !!strcmp(speed_mode, "MIN"))
err = of_property_match_string(np, key, "MAX");
else
err = of_property_match_string(np, key, speed_mode);
out:
if (err < 0)
dev_err(dev, "%s: Invalid %s mode %d\n",
__func__, speed_mode, err);
return err;
}
static void ufs_qcom_get_speed_mode(struct ufs_pa_layer_attr *p, char *result)
{
int gear = max_t(u32, p->gear_rx, p->gear_tx);
int lanes = max_t(u32, p->lane_rx, p->lane_tx);
int pwr;
/* default to PWM Gear 1, Lane 1 if power mode is not initialized */
if (!gear)
gear = 1;
if (!lanes)
lanes = 1;
if (!p->pwr_rx && !p->pwr_tx) {
pwr = SLOWAUTO_MODE;
snprintf(result, BUS_VECTOR_NAME_LEN, "MIN");
} else if (p->pwr_rx == FAST_MODE || p->pwr_rx == FASTAUTO_MODE ||
p->pwr_tx == FAST_MODE || p->pwr_tx == FASTAUTO_MODE) {
pwr = FAST_MODE;
snprintf(result, BUS_VECTOR_NAME_LEN, "%s_R%s_G%d_L%d", "HS",
p->hs_rate == PA_HS_MODE_B ? "B" : "A", gear, lanes);
} else {
pwr = SLOW_MODE;
snprintf(result, BUS_VECTOR_NAME_LEN, "%s_G%d_L%d",
"PWM", gear, lanes);
}
}
static int ufs_qcom_set_bus_vote(struct ufs_qcom_host *host, int vote)
{
int err = 0;
if (vote != host->bus_vote.curr_vote) {
err = msm_bus_scale_client_update_request(
host->bus_vote.client_handle, vote);
if (err) {
dev_err(host->hba->dev,
"%s: msm_bus_scale_client_update_request() failed: bus_client_handle=0x%x, vote=%d, err=%d\n",
__func__, host->bus_vote.client_handle,
vote, err);
goto out;
}
host->bus_vote.curr_vote = vote;
}
out:
return err;
}
static int ufs_qcom_update_bus_bw_vote(struct ufs_qcom_host *host)
{
int vote;
int err = 0;
char mode[BUS_VECTOR_NAME_LEN];
ufs_qcom_get_speed_mode(&host->dev_req_params, mode);
vote = ufs_qcom_get_bus_vote(host, mode);
if (vote >= 0)
err = ufs_qcom_set_bus_vote(host, vote);
else
err = vote;
if (err)
dev_err(host->hba->dev, "%s: failed %d\n", __func__, err);
else
host->bus_vote.saved_vote = vote;
return err;
}
static ssize_t
show_ufs_to_mem_max_bus_bw(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct ufs_hba *hba = dev_get_drvdata(dev);
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
return snprintf(buf, PAGE_SIZE, "%u\n",
host->bus_vote.is_max_bw_needed);
}
static ssize_t
store_ufs_to_mem_max_bus_bw(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct ufs_hba *hba = dev_get_drvdata(dev);
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
uint32_t value;
if (!kstrtou32(buf, 0, &value)) {
host->bus_vote.is_max_bw_needed = !!value;
ufs_qcom_update_bus_bw_vote(host);
}
return count;
}
static int ufs_qcom_bus_register(struct ufs_qcom_host *host)
{
int err;
struct msm_bus_scale_pdata *bus_pdata;
struct device *dev = host->hba->dev;
struct platform_device *pdev = to_platform_device(dev);
struct device_node *np = dev->of_node;
bus_pdata = msm_bus_cl_get_pdata(pdev);
if (!bus_pdata) {
dev_err(dev, "%s: failed to get bus vectors\n", __func__);
err = -ENODATA;
goto out;
}
err = of_property_count_strings(np, "qcom,bus-vector-names");
if (err < 0 || err != bus_pdata->num_usecases) {
dev_err(dev, "%s: qcom,bus-vector-names not specified correctly %d\n",
__func__, err);
goto out;
}
host->bus_vote.client_handle = msm_bus_scale_register_client(bus_pdata);
if (!host->bus_vote.client_handle) {
dev_err(dev, "%s: msm_bus_scale_register_client failed\n",
__func__);
err = -EFAULT;
goto out;
}
/* cache the vote index for minimum and maximum bandwidth */
host->bus_vote.min_bw_vote = ufs_qcom_get_bus_vote(host, "MIN");
host->bus_vote.max_bw_vote = ufs_qcom_get_bus_vote(host, "MAX");
host->bus_vote.max_bus_bw.show = show_ufs_to_mem_max_bus_bw;
host->bus_vote.max_bus_bw.store = store_ufs_to_mem_max_bus_bw;
sysfs_attr_init(&host->bus_vote.max_bus_bw.attr);
host->bus_vote.max_bus_bw.attr.name = "max_bus_bw";
host->bus_vote.max_bus_bw.attr.mode = S_IRUGO | S_IWUSR;
err = device_create_file(dev, &host->bus_vote.max_bus_bw);
out:
return err;
}
#else /* CONFIG_MSM_BUS_SCALING */
static int ufs_qcom_update_bus_bw_vote(struct ufs_qcom_host *host)
{
return 0;
}
static int ufs_qcom_set_bus_vote(struct ufs_qcom_host *host, int vote)
{
return 0;
}
static int ufs_qcom_bus_register(struct ufs_qcom_host *host)
{
return 0;
}
#endif /* CONFIG_MSM_BUS_SCALING */
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 at least 1us after the
* hibern8 enter.
*/
if (!enable)
udelay(1);
writel_relaxed(temp, host->dev_ref_clk_ctrl_mmio);
/* ensure that ref_clk is enabled/disabled before we return */
wmb();
/*
* If we call hibern8 exit after this, we need to make sure that
* device ref_clk is stable for at least 1us before the hibern8
* exit command.
*/
if (enable)
udelay(1);
host->is_dev_ref_clk_enabled = enable;
}
}
static int ufs_qcom_pwr_change_notify(struct ufs_hba *hba,
enum ufs_notify_change_status status,
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_dev_params ufs_qcom_cap;
int ret = 0;
if (!dev_req_params) {
pr_err("%s: incoming dev_req_params is NULL\n", __func__);
ret = -EINVAL;
goto out;
}
switch (status) {
case PRE_CHANGE:
ufs_qcom_cap.tx_lanes = UFS_QCOM_LIMIT_NUM_LANES_TX;
ufs_qcom_cap.rx_lanes = UFS_QCOM_LIMIT_NUM_LANES_RX;
ufs_qcom_cap.hs_rx_gear = UFS_QCOM_LIMIT_HSGEAR_RX;
ufs_qcom_cap.hs_tx_gear = UFS_QCOM_LIMIT_HSGEAR_TX;
ufs_qcom_cap.pwm_rx_gear = UFS_QCOM_LIMIT_PWMGEAR_RX;
ufs_qcom_cap.pwm_tx_gear = UFS_QCOM_LIMIT_PWMGEAR_TX;
ufs_qcom_cap.rx_pwr_pwm = UFS_QCOM_LIMIT_RX_PWR_PWM;
ufs_qcom_cap.tx_pwr_pwm = UFS_QCOM_LIMIT_TX_PWR_PWM;
ufs_qcom_cap.rx_pwr_hs = UFS_QCOM_LIMIT_RX_PWR_HS;
ufs_qcom_cap.tx_pwr_hs = UFS_QCOM_LIMIT_TX_PWR_HS;
ufs_qcom_cap.hs_rate = UFS_QCOM_LIMIT_HS_RATE;
ufs_qcom_cap.desired_working_mode =
UFS_QCOM_LIMIT_DESIRED_MODE;
if (host->hw_ver.major == 0x1) {
/*
* HS-G3 operations may not reliably work on legacy QCOM
* UFS host controller hardware even though capability
* exchange during link startup phase may end up
* negotiating maximum supported gear as G3.
* Hence downgrade the maximum supported gear to HS-G2.
*/
if (ufs_qcom_cap.hs_tx_gear > UFS_HS_G2)
ufs_qcom_cap.hs_tx_gear = UFS_HS_G2;
if (ufs_qcom_cap.hs_rx_gear > UFS_HS_G2)
ufs_qcom_cap.hs_rx_gear = UFS_HS_G2;
}
ret = ufshcd_get_pwr_dev_param(&ufs_qcom_cap,
dev_max_params,
dev_req_params);
if (ret) {
pr_err("%s: failed to determine capabilities\n",
__func__);
goto out;
}
/* 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);
break;
case POST_CHANGE:
if (ufs_qcom_cfg_timers(hba, dev_req_params->gear_rx,
dev_req_params->pwr_rx,
dev_req_params->hs_rate, false)) {
dev_err(hba->dev, "%s: ufs_qcom_cfg_timers() failed\n",
__func__);
/*
* we return error code at the end of the routine,
* but continue to configure UFS_PHY_TX_LANE_ENABLE
* and bus voting as usual
*/
ret = -EINVAL;
}
/* cache the power mode parameters to use internally */
memcpy(&host->dev_req_params,
dev_req_params, sizeof(*dev_req_params));
ufs_qcom_update_bus_bw_vote(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;
}
out:
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)
goto out;
/* Allow extension of MSB bits of PA_SaveConfigTime attribute */
err = ufshcd_dme_set(hba, UIC_ARG_MIB(PA_VS_CONFIG_REG1),
(pa_vs_config_reg1 | (1 << 12)));
out:
return 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);
return err;
}
static u32 ufs_qcom_get_ufs_hci_version(struct ufs_hba *hba)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
if (host->hw_ver.major == 0x1)
return UFSHCI_VERSION_11;
else
return UFSHCI_VERSION_20;
}
/**
* 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)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
if (host->hw_ver.major == 0x01) {
hba->quirks |= UFSHCD_QUIRK_DELAY_BEFORE_DME_CMDS
| UFSHCD_QUIRK_BROKEN_PA_RXHSUNTERMCAP
| UFSHCD_QUIRK_DME_PEER_ACCESS_AUTO_MODE;
if (host->hw_ver.minor == 0x0001 && host->hw_ver.step == 0x0001)
hba->quirks |= UFSHCD_QUIRK_BROKEN_INTR_AGGR;
hba->quirks |= UFSHCD_QUIRK_BROKEN_LCC;
}
if (host->hw_ver.major == 0x2) {
hba->quirks |= UFSHCD_QUIRK_BROKEN_UFS_HCI_VERSION;
if (!ufs_qcom_cap_qunipro(host))
/* Legacy UniPro mode still need following quirks */
hba->quirks |= (UFSHCD_QUIRK_DELAY_BEFORE_DME_CMDS
| UFSHCD_QUIRK_DME_PEER_ACCESS_AUTO_MODE
| UFSHCD_QUIRK_BROKEN_PA_RXHSUNTERMCAP);
}
}
static void ufs_qcom_set_caps(struct ufs_hba *hba)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
hba->caps |= UFSHCD_CAP_CLK_GATING | UFSHCD_CAP_HIBERN8_WITH_CLK_GATING;
hba->caps |= UFSHCD_CAP_CLK_SCALING;
hba->caps |= UFSHCD_CAP_AUTO_BKOPS_SUSPEND;
if (host->hw_ver.major >= 0x2) {
host->caps = UFS_QCOM_CAP_QUNIPRO |
UFS_QCOM_CAP_RETAIN_SEC_CFG_AFTER_PWR_COLLAPSE;
}
}
/**
* 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
*
* Returns 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);
int err;
int vote = 0;
/*
* 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;
if (on && (status == POST_CHANGE)) {
/* enable the device ref clock for HS mode*/
if (ufshcd_is_hs_mode(&hba->pwr_info))
ufs_qcom_dev_ref_clk_ctrl(host, true);
vote = host->bus_vote.saved_vote;
if (vote == host->bus_vote.min_bw_vote)
ufs_qcom_update_bus_bw_vote(host);
} else if (!on && (status == PRE_CHANGE)) {
if (!ufs_qcom_is_link_active(hba)) {
/* disable device ref_clk */
ufs_qcom_dev_ref_clk_ctrl(host, false);
}
vote = host->bus_vote.min_bw_vote;
}
err = ufs_qcom_set_bus_vote(host, vote);
if (err)
dev_err(hba->dev, "%s: set bus vote failed %d\n",
__func__, err);
return err;
}
static int
ufs_qcom_reset_assert(struct reset_controller_dev *rcdev, unsigned long id)
{
struct ufs_qcom_host *host = rcdev_to_ufs_host(rcdev);
/* Currently this code only knows about a single reset. */
WARN_ON(id);
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);
/* Currently this code only knows about a single reset. */
WARN_ON(id);
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,
};
#define ANDROID_BOOT_DEV_MAX 30
static char android_boot_dev[ANDROID_BOOT_DEV_MAX];
#ifndef MODULE
static int __init get_android_boot_dev(char *str)
{
strlcpy(android_boot_dev, str, ANDROID_BOOT_DEV_MAX);
return 1;
}
__setup("androidboot.bootdevice=", get_android_boot_dev);
#endif
/**
* ufs_qcom_init - bind phy with controller
* @hba: host controller instance
*
* Binds PHY with controller and powers up PHY enabling clocks
* and regulators.
*
* Returns -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 platform_device *pdev = to_platform_device(dev);
struct ufs_qcom_host *host;
struct resource *res;
if (strlen(android_boot_dev) && strcmp(android_boot_dev, dev_name(dev)))
return -ENODEV;
host = devm_kzalloc(dev, sizeof(*host), GFP_KERNEL);
if (!host) {
err = -ENOMEM;
dev_err(dev, "%s: no memory for qcom ufs host\n", __func__);
goto out;
}
/* Make a two way bind between the qcom host and the hba */
host->hba = hba;
ufshcd_set_variant(hba, host);
/* Setup the reset control of HCI */
host->core_reset = devm_reset_control_get(hba->dev, "rst");
if (IS_ERR(host->core_reset)) {
err = PTR_ERR(host->core_reset);
dev_warn(dev, "Failed to get reset control %d\n", err);
host->core_reset = NULL;
err = 0;
}
/* 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");
err = 0;
}
/*
* voting/devoting device ref_clk source is time consuming hence
* skip devoting it during aggressive clock gating. This clock
* will still be gated off during runtime suspend.
*/
host->generic_phy = devm_phy_get(dev, "ufsphy");
if (host->generic_phy == ERR_PTR(-EPROBE_DEFER)) {
/*
* UFS driver might be probed before the phy driver does.
* In that case we would like to return EPROBE_DEFER code.
*/
err = -EPROBE_DEFER;
dev_warn(dev, "%s: required phy device. hasn't probed yet. err = %d\n",
__func__, err);
goto out_variant_clear;
} else if (IS_ERR(host->generic_phy)) {
if (has_acpi_companion(dev)) {
host->generic_phy = NULL;
} else {
err = PTR_ERR(host->generic_phy);
dev_err(dev, "%s: PHY get failed %d\n", __func__, err);
goto out_variant_clear;
}
}
host->device_reset = devm_gpiod_get_optional(dev, "reset",
GPIOD_OUT_HIGH);
if (IS_ERR(host->device_reset)) {
err = PTR_ERR(host->device_reset);
if (err != -EPROBE_DEFER)
dev_err(dev, "failed to acquire reset gpio: %d\n", err);
goto out_variant_clear;
}
err = ufs_qcom_bus_register(host);
if (err)
goto out_variant_clear;
ufs_qcom_get_controller_revision(hba, &host->hw_ver.major,
&host->hw_ver.minor, &host->hw_ver.step);
/*
* for newer controllers, device reference clock control bit has
* moved inside UFS controller register address space itself.
*/
if (host->hw_ver.major >= 0x02) {
host->dev_ref_clk_ctrl_mmio = hba->mmio_base + REG_UFS_CFG1;
host->dev_ref_clk_en_mask = BIT(26);
} else {
/* "dev_ref_clk_ctrl_mem" is optional resource */
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
if (res) {
host->dev_ref_clk_ctrl_mmio =
devm_ioremap_resource(dev, res);
if (IS_ERR(host->dev_ref_clk_ctrl_mmio)) {
dev_warn(dev,
"%s: could not map dev_ref_clk_ctrl_mmio, err %ld\n",
__func__,
PTR_ERR(host->dev_ref_clk_ctrl_mmio));
host->dev_ref_clk_ctrl_mmio = NULL;
}
host->dev_ref_clk_en_mask = BIT(5);
}
}
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_setup_clocks(hba, true, POST_CHANGE);
if (hba->dev->id < MAX_UFS_QCOM_HOSTS)
ufs_qcom_hosts[hba->dev->id] = host;
host->dbg_print_en |= UFS_QCOM_DEFAULT_DBG_PRINT_EN;
ufs_qcom_get_default_testbus_cfg(host);
err = ufs_qcom_testbus_config(host);
if (err) {
dev_warn(dev, "%s: failed to configure the testbus %d\n",
__func__, err);
err = 0;
}
goto out;
out_variant_clear:
ufshcd_set_variant(hba, NULL);
out:
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);
}
static int ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(struct ufs_hba *hba,
u32 clk_cycles)
{
int err;
u32 core_clk_ctrl_reg;
if (clk_cycles > DME_VS_CORE_CLK_CTRL_MAX_CORE_CLK_1US_CYCLES_MASK)
return -EINVAL;
err = ufshcd_dme_get(hba,
UIC_ARG_MIB(DME_VS_CORE_CLK_CTRL),
&core_clk_ctrl_reg);
if (err)
goto out;
core_clk_ctrl_reg &= ~DME_VS_CORE_CLK_CTRL_MAX_CORE_CLK_1US_CYCLES_MASK;
core_clk_ctrl_reg |= clk_cycles;
/* 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);
out:
return err;
}
static int ufs_qcom_clk_scale_up_pre_change(struct ufs_hba *hba)
{
/* nothing to do as of now */
return 0;
}
static int ufs_qcom_clk_scale_up_post_change(struct ufs_hba *hba)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
if (!ufs_qcom_cap_qunipro(host))
return 0;
/* set unipro core clock cycles to 150 and clear clock divider */
return ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(hba, 150);
}
static int ufs_qcom_clk_scale_down_pre_change(struct ufs_hba *hba)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
int err;
u32 core_clk_ctrl_reg;
if (!ufs_qcom_cap_qunipro(host))
return 0;
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)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
if (!ufs_qcom_cap_qunipro(host))
return 0;
/* set unipro core clock cycles to 75 and clear clock divider */
return ufs_qcom_set_dme_vs_core_clk_ctrl_clear_div(hba, 75);
}
static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba,
bool scale_up, enum ufs_notify_change_status status)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
struct ufs_pa_layer_attr *dev_req_params = &host->dev_req_params;
int err = 0;
if (status == PRE_CHANGE) {
if (scale_up)
err = ufs_qcom_clk_scale_up_pre_change(hba);
else
err = ufs_qcom_clk_scale_down_pre_change(hba);
} else {
if (scale_up)
err = ufs_qcom_clk_scale_up_post_change(hba);
else
err = ufs_qcom_clk_scale_down_post_change(hba);
if (err || !dev_req_params)
goto out;
ufs_qcom_cfg_timers(hba,
dev_req_params->gear_rx,
dev_req_params->pwr_rx,
dev_req_params->hs_rate,
false);
ufs_qcom_update_bus_bw_vote(host);
}
out:
return err;
}
static void ufs_qcom_print_hw_debug_reg_all(struct ufs_hba *hba,
void *priv, void (*print_fn)(struct ufs_hba *hba,
int offset, int num_regs, const char *str, void *priv))
{
u32 reg;
struct ufs_qcom_host *host;
if (unlikely(!hba)) {
pr_err("%s: hba is NULL\n", __func__);
return;
}
if (unlikely(!print_fn)) {
dev_err(hba->dev, "%s: print_fn is NULL\n", __func__);
return;
}
host = ufshcd_get_variant(hba);
if (!(host->dbg_print_en & UFS_QCOM_DBG_PRINT_REGS_EN))
return;
reg = ufs_qcom_get_debug_reg_offset(host, UFS_UFS_DBG_RD_REG_OCSC);
print_fn(hba, reg, 44, "UFS_UFS_DBG_RD_REG_OCSC ", priv);
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);
print_fn(hba, reg, 32, "UFS_UFS_DBG_RD_EDTL_RAM ", priv);
reg = ufs_qcom_get_debug_reg_offset(host, UFS_UFS_DBG_RD_DESC_RAM);
print_fn(hba, reg, 128, "UFS_UFS_DBG_RD_DESC_RAM ", priv);
reg = ufs_qcom_get_debug_reg_offset(host, UFS_UFS_DBG_RD_PRDT_RAM);
print_fn(hba, reg, 64, "UFS_UFS_DBG_RD_PRDT_RAM ", priv);
/* 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);
print_fn(hba, reg, 4, "UFS_DBG_RD_REG_UAWM ", priv);
reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_UARM);
print_fn(hba, reg, 4, "UFS_DBG_RD_REG_UARM ", priv);
reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_TXUC);
print_fn(hba, reg, 48, "UFS_DBG_RD_REG_TXUC ", priv);
reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_RXUC);
print_fn(hba, reg, 27, "UFS_DBG_RD_REG_RXUC ", priv);
reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_DFC);
print_fn(hba, reg, 19, "UFS_DBG_RD_REG_DFC ", priv);
reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_TRLUT);
print_fn(hba, reg, 34, "UFS_DBG_RD_REG_TRLUT ", priv);
reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_TMRLUT);
print_fn(hba, reg, 9, "UFS_DBG_RD_REG_TMRLUT ", priv);
}
static void ufs_qcom_enable_test_bus(struct ufs_qcom_host *host)
{
if (host->dbg_print_en & UFS_QCOM_DBG_PRINT_TEST_BUS_EN) {
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);
} else {
ufshcd_rmwl(host->hba, UFS_REG_TEST_BUS_EN, 0, REG_UFS_CFG1);
ufshcd_rmwl(host->hba, TEST_BUS_EN, 0, 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 = 0xFFF;
break;
/*
* No need for a default case, since
* ufs_qcom_testbus_cfg_is_ok() checks that the configuration
* is legal
*/
}
mask <<= offset;
pm_runtime_get_sync(host->hba->dev);
ufshcd_hold(host->hba, false);
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);
/*
* Make sure the test bus configuration is
* committed before returning.
*/
mb();
ufshcd_release(host->hba);
pm_runtime_put_sync(host->hba->dev);
return 0;
}
static void ufs_qcom_testbus_read(struct ufs_hba *hba)
{
ufshcd_dump_regs(hba, UFS_TEST_BUS, 4, "UFS_TEST_BUS ");
}
static void ufs_qcom_print_unipro_testbus(struct ufs_hba *hba)
{
struct ufs_qcom_host *host = ufshcd_get_variant(hba);
u32 *testbus = NULL;
int i, nminor = 256, testbus_len = nminor * sizeof(u32);
testbus = kmalloc(testbus_len, GFP_KERNEL);
if (!testbus)
return;
host->testbus.select_major = TSTBUS_UNIPRO;
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, "UNIPRO_TEST_BUS ", DUMP_PREFIX_OFFSET,
16, 4, testbus, testbus_len, false);
kfree(testbus);
}
static void ufs_qcom_dump_dbg_regs(struct ufs_hba *hba)
{
ufshcd_dump_regs(hba, REG_UFS_SYS1CLK_1US, 16 * 4,
"HCI Vendor Specific Registers ");
/* sleep a bit intermittently as we are dumping too much data */
ufs_qcom_print_hw_debug_reg_all(hba, NULL, ufs_qcom_dump_regs_wrapper);
usleep_range(1000, 1100);
ufs_qcom_testbus_read(hba);
usleep_range(1000, 1100);
ufs_qcom_print_unipro_testbus(hba);
usleep_range(1000, 1100);
}
/**
* 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 void 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;
/*
* The UFS device shall detect reset pulses of 1us, sleep for 10us to
* be on the safe side.
*/
gpiod_set_value_cansleep(host->device_reset, 1);
usleep_range(10, 15);
gpiod_set_value_cansleep(host->device_reset, 0);
usleep_range(10, 15);
}
/**
* 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,
.suspend = ufs_qcom_suspend,
.resume = ufs_qcom_resume,
.dbg_register_dump = ufs_qcom_dump_dbg_regs,
.device_reset = ufs_qcom_device_reset,
};
/**
* 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)
dev_err(dev, "ufshcd_pltfrm_init() failed %d\n", err);
return err;
}
/**
* ufs_qcom_remove - set driver_data of the device to NULL
* @pdev: pointer to platform device handle
*
* Always returns 0
*/
static int ufs_qcom_remove(struct platform_device *pdev)
{
struct ufs_hba *hba = platform_get_drvdata(pdev);
pm_runtime_get_sync(&(pdev)->dev);
ufshcd_remove(hba);
return 0;
}
static const struct of_device_id ufs_qcom_of_match[] = {
{ .compatible = "qcom,ufshc"},
{},
};
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 = {
.suspend = ufshcd_pltfrm_suspend,
.resume = ufshcd_pltfrm_resume,
.runtime_suspend = ufshcd_pltfrm_runtime_suspend,
.runtime_resume = ufshcd_pltfrm_runtime_resume,
.runtime_idle = ufshcd_pltfrm_runtime_idle,
};
static struct platform_driver ufs_qcom_pltform = {
.probe = ufs_qcom_probe,
.remove = ufs_qcom_remove,
.shutdown = ufshcd_pltfrm_shutdown,
.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_LICENSE("GPL v2");
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