Add a new get_max_pwr_mode callback to permit the UFS controller driver manipulate the max_pwr_mode struct right before setting the new pwr_mode to the UFS device.

It can be used to limit the HS Gear with errata and hardware limitations on some UFS controllers.

Signed-off-by: Neil Armstrong neil.armstrong@linaro.org --- drivers/ufs/ufs.c | 2 +- drivers/ufs/ufs.h | 11 +++++++++++ 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/ufs/ufs.c b/drivers/ufs/ufs.c index de8ba011d57..1edd31677b2 100644 --- a/drivers/ufs/ufs.c +++ b/drivers/ufs/ufs.c @@ -1744,7 +1744,7 @@ static int ufshcd_get_max_pwr_mode(struct ufs_hba *hba) }

hba->max_pwr_info.is_valid = true; - return 0; + return ufshcd_ops_get_max_pwr_mode(hba, &hba->max_pwr_info); }

static int ufshcd_change_power_mode(struct ufs_hba *hba, diff --git a/drivers/ufs/ufs.h b/drivers/ufs/ufs.h index faaebf1f9f7..fb47d0cd3a4 100644 --- a/drivers/ufs/ufs.h +++ b/drivers/ufs/ufs.h @@ -696,6 +696,8 @@ struct ufs_dev_cmd {

struct ufs_hba_ops { int (*init)(struct ufs_hba *hba); + int (*get_max_pwr_mode)(struct ufs_hba *hba, + struct ufs_pwr_mode_info *max_pwr_info); int (*hce_enable_notify)(struct ufs_hba *hba, enum ufs_notify_change_status); int (*link_startup_notify)(struct ufs_hba *hba, @@ -861,6 +863,15 @@ static inline int ufshcd_ops_init(struct ufs_hba *hba) return 0; }

+static inline int ufshcd_ops_get_max_pwr_mode(struct ufs_hba *hba, + struct ufs_pwr_mode_info *max_pwr_info) +{ + if (hba->ops && hba->ops->get_max_pwr_mode) + return hba->ops->get_max_pwr_mode(hba, max_pwr_info); + + return 0; +} + static inline int ufshcd_ops_hce_enable_notify(struct ufs_hba *hba, bool status) {

From: Bhupesh Sharma bhupesh.linux@gmail.com

Add Support for the Host Controller driver for UFS HC present on Qualcomm Snapdragon SoCs.

It has been successfully tested on SDM845, SM8250, SM8550 ant SM8650 SoCs.

Signed-off-by: Bhupesh Sharma bhupesh.sharma@linaro.org Signed-off-by: Neil Armstrong neil.armstrong@linaro.org --- drivers/ufs/Kconfig | 7 + drivers/ufs/Makefile | 1 + drivers/ufs/ufs-qcom.c | 670 +++++++++++++++++++++++++++++++++++++++++++++++++ drivers/ufs/ufs-qcom.h | 147 +++++++++++ drivers/ufs/unipro.h | 6 + 5 files changed, 831 insertions(+)

diff --git a/drivers/ufs/Kconfig b/drivers/ufs/Kconfig index 7da46faed6b..0ca1f2ae7dc 100644 --- a/drivers/ufs/Kconfig +++ b/drivers/ufs/Kconfig @@ -26,6 +26,13 @@ config UFS_PCI

If unsure, say N.

+config QCOM_UFS + bool "Qualcomm Host Controller driver for UFS" + depends on UFS && ARCH_SNAPDRAGON + help + This selects the platform driver for the UFS host + controller present on Qualcomm Snapdragon SoCs. + config TI_J721E_UFS bool "Glue Layer driver for UFS on TI J721E devices" help diff --git a/drivers/ufs/Makefile b/drivers/ufs/Makefile index 67c42621aba..024382cd2ce 100644 --- a/drivers/ufs/Makefile +++ b/drivers/ufs/Makefile @@ -5,6 +5,7 @@

obj-$(CONFIG_UFS) += ufs.o ufs-uclass.o obj-$(CONFIG_CADENCE_UFS) += cdns-platform.o +obj-$(CONFIG_QCOM_UFS) += ufs-qcom.o obj-$(CONFIG_TI_J721E_UFS) += ti-j721e-ufs.o obj-$(CONFIG_UFS_PCI) += ufs-pci.o obj-$(CONFIG_UFS_RENESAS) += ufs-renesas.o diff --git a/drivers/ufs/ufs-qcom.c b/drivers/ufs/ufs-qcom.c new file mode 100644 index 00000000000..843585726c7 --- /dev/null +++ b/drivers/ufs/ufs-qcom.c @@ -0,0 +1,670 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2013-2016, Linux Foundation. All rights reserved. + * Copyright (C) 2023-2024 Linaro Limited + * Authors: + * - Bhupesh Sharma bhupesh.sharma@linaro.org + * - Neil Armstrong neil.armstrong@linaro.org + * + * Based on Linux driver + */ + +#include <asm/io.h> +#include <clk.h> +#include <dm.h> +#include <dm/device_compat.h> +#include <generic-phy.h> +#include <ufs.h> +#include <asm/gpio.h> + +#include <linux/bitops.h> +#include <linux/delay.h> +#include <linux/err.h> + +#include "ufs.h" +#include "ufs-qcom.h" + +#define ceil(freq, div) ((freq) % (div) == 0 ? ((freq) / (div)) : ((freq) / (div) + 1)) + +static void ufs_qcom_dev_ref_clk_ctrl(struct ufs_hba *hba, bool enable); + +static int ufs_qcom_enable_clks(struct ufs_qcom_priv *priv) +{ + int err; + + if (priv->is_clks_enabled) + return 0; + + err = clk_enable_bulk(&priv->clks); + if (err) + return err; + + priv->is_clks_enabled = true; + + return 0; +} + +static int ufs_qcom_init_clks(struct ufs_qcom_priv *priv) +{ + int err; + struct udevice *dev = priv->hba->dev; + + err = clk_get_bulk(dev, &priv->clks); + if (err) + return err; + + return 0; +} + +static int ufs_qcom_check_hibern8(struct ufs_hba *hba) +{ + int err, retry_count = 50; + u32 tx_fsm_val = 0; + + 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; + + /* max. 200us */ + udelay(200); + retry_count--; + } while (retry_count != 0); + + /* Check the state again */ + 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_priv *priv) +{ + ufshcd_rmwl(priv->hba, QUNIPRO_SEL, QUNIPRO_SEL, REG_UFS_CFG1); + + if (priv->hw_ver.major >= 0x05) + ufshcd_rmwl(priv->hba, QUNIPRO_G4_SEL, 0, REG_UFS_CFG0); +} + +/* + * ufs_qcom_reset - reset host controller and PHY + */ +static int ufs_qcom_reset(struct ufs_hba *hba) +{ + struct ufs_qcom_priv *priv = dev_get_priv(hba->dev); + int ret; + + ret = reset_assert(&priv->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 (32.7KHz) cycles, which comes to + * ~125us (4/32768). To be on the safe side add 200us delay. + */ + udelay(210); + + ret = reset_deassert(&priv->core_reset); + if (ret) + dev_err(hba->dev, "%s: core_reset deassert failed, err = %d\n", + __func__, ret); + + udelay(1100); + + return 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) +{ + struct ufs_qcom_priv *priv = dev_get_priv(hba->dev); + + if (priv->hw_ver.major == 0x2) + hba->quirks |= UFSHCD_QUIRK_BROKEN_UFS_HCI_VERSION; + + if (priv->hw_ver.major > 0x3) + hba->quirks |= UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH; +} + +/** + * 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) +{ + switch (status) { + case PRE_CHANGE: + if (!on) + /* disable device ref_clk */ + ufs_qcom_dev_ref_clk_ctrl(hba, false); + break; + case POST_CHANGE: + if (on) + /* enable the device ref clock for HS mode*/ + ufs_qcom_dev_ref_clk_ctrl(hba, true); + break; + } + + return 0; +} + +static u32 ufs_qcom_get_hs_gear(struct ufs_hba *hba) +{ + struct ufs_qcom_priv *priv = dev_get_priv(hba->dev); + + /* + * TOFIX: v4 controllers *should* be able to support HS Gear 4 + * but so far pwr_mode switch is failing on v4 controllers and HS Gear 4. + * only enable HS Gear > 3 for Controlers major version 5 and later. + */ + if (priv->hw_ver.major > 0x4) + return UFS_QCOM_MAX_GEAR(ufshcd_readl(hba, REG_UFS_PARAM0)); + + /* Default is HS-G3 */ + return UFS_HS_G3; +} + +static int ufs_get_max_pwr_mode(struct ufs_hba *hba, + struct ufs_pwr_mode_info *max_pwr_info) +{ + struct ufs_qcom_priv *priv = dev_get_priv(hba->dev); + u32 max_gear = ufs_qcom_get_hs_gear(hba); + + max_pwr_info->info.gear_rx = min(max_pwr_info->info.gear_rx, max_gear); + /* Qualcomm UFS only support symmetric Gear */ + max_pwr_info->info.gear_tx = max_pwr_info->info.gear_rx; + + if (priv->hw_ver.major >= 0x4 && max_pwr_info->info.gear_rx > UFS_HS_G3) + ufshcd_dme_set(hba, + UIC_ARG_MIB(PA_TXHSADAPTTYPE), + PA_INITIAL_ADAPT); + + dev_info(hba->dev, "Max HS Gear: %d\n", max_pwr_info->info.gear_rx); + + return 0; +} + +static int ufs_qcom_power_up_sequence(struct ufs_hba *hba) +{ + struct ufs_qcom_priv *priv = dev_get_priv(hba->dev); + struct phy phy; + int ret; + + /* Reset UFS Host Controller and PHY */ + ret = ufs_qcom_reset(hba); + if (ret) + dev_warn(hba->dev, "%s: host reset returned %d\n", + __func__, ret); + + /* get phy */ + ret = generic_phy_get_by_name(hba->dev, "ufsphy", &phy); + if (ret) { + dev_warn(hba->dev, "%s: Unable to get QMP ufs phy, ret = %d\n", + __func__, ret); + return ret; + } + + /* phy initialization */ + ret = generic_phy_init(&phy); + if (ret) { + dev_err(hba->dev, "%s: phy init failed, ret = %d\n", + __func__, ret); + return ret; + } + + /* power on phy */ + ret = generic_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(priv); + + return 0; + +out_disable_phy: + generic_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) +{ + 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); +} + +static int ufs_qcom_hce_enable_notify(struct ufs_hba *hba, + enum ufs_notify_change_status status) +{ + struct ufs_qcom_priv *priv = dev_get_priv(hba->dev); + int err; + + 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_clks(priv); + 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; +} + +/* Look for the maximum core_clk_unipro clock value */ +static u32 ufs_qcom_get_core_clk_unipro_max_freq(struct ufs_hba *hba) +{ + struct ufs_qcom_priv *priv = dev_get_priv(hba->dev); + ofnode node = dev_ofnode(priv->hba->dev); + struct ofnode_phandle_args opp_table; + int pos, ret; + u32 clk = 0; + + /* Get core_clk_unipro clock index */ + pos = ofnode_stringlist_search(node, "clock-names", "core_clk_unipro"); + if (pos < 0) + goto fallback; + + /* Try parsing the opps */ + if (!ofnode_parse_phandle_with_args(node, "required-opps", + NULL, 0, 0, &opp_table) && + ofnode_device_is_compatible(opp_table.node, "operating-points-v2")) { + ofnode opp_node; + + ofnode_for_each_subnode(opp_node, opp_table.node) { + u64 opp_clk; + /* opp-hw contains the OPP frequency */ + ret = ofnode_read_u64_index(opp_node, "opp-hz", pos, &opp_clk); + if (ret) + continue; + + /* We don't handle larger clock values, ignore */ + if (opp_clk > U32_MAX) + continue; + + /* Only keep the largest value */ + if (opp_clk > clk) + clk = opp_clk; + } + + /* If we get a valid clock, return it or check legacy*/ + if (clk) + return clk; + } + + /* Legacy freq-table-hz has a pair of u32 per clocks entry, min then max */ + if (!ofnode_read_u32_index(node, "freq-table-hz", pos * 2 + 1, &clk) && + clk > 0) + return clk; + +fallback: + /* default for backwards compatibility */ + return UNIPRO_CORE_CLK_FREQ_150_MHZ * 1000 * 1000; +}; + +static int ufs_qcom_set_clk_40ns_cycles(struct ufs_hba *hba, + u32 cycles_in_1us) +{ + struct ufs_qcom_priv *priv = dev_get_priv(hba->dev); + u32 cycles_in_40ns; + int err; + u32 reg; + + /* + * 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 (priv->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), &reg); + 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) +{ + struct ufs_qcom_priv *priv = dev_get_priv(hba->dev); + u32 core_clk_ctrl_reg; + u32 cycles_in_1us; + int err; + + cycles_in_1us = ceil(ufs_qcom_get_core_clk_unipro_max_freq(hba), + (1000 * 1000)); + 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 (priv->hw_ver.major >= 4) { + core_clk_ctrl_reg &= ~CLK_1US_CYCLES_MASK_V4; + core_clk_ctrl_reg |= FIELD_PREP(CLK_1US_CYCLES_MASK_V4, cycles_in_1us); + } else { + 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 u32 ufs_qcom_get_local_unipro_ver(struct ufs_hba *hba) +{ + /* HCI version 1.0 and 1.1 supports UniPro 1.41 */ + switch (hba->version) { + case UFSHCI_VERSION_10: + case UFSHCI_VERSION_11: + return UFS_UNIPRO_VER_1_41; + + case UFSHCI_VERSION_20: + case UFSHCI_VERSION_21: + default: + return UFS_UNIPRO_VER_1_6; + } +} + +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: + err = ufs_qcom_set_core_clk_ctrl(hba); + 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. + */ + if (ufs_qcom_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; + default: + break; + } + + return err; +} + +static void ufs_qcom_dev_ref_clk_ctrl(struct ufs_hba *hba, bool enable) +{ + struct ufs_qcom_priv *priv = dev_get_priv(hba->dev); + + if (enable ^ priv->is_dev_ref_clk_enabled) { + u32 temp = readl_relaxed(hba->mmio_base + REG_UFS_CFG1); + + if (enable) + temp |= BIT(26); + else + temp &= ~BIT(26); + + /* + * 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) + udelay(10); + + writel_relaxed(temp, hba->mmio_base + REG_UFS_CFG1); + + /* + * Make sure the write to ref_clk reaches the destination and + * not stored in a Write Buffer (WB). + */ + readl(hba->mmio_base + REG_UFS_CFG1); + + /* + * 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); + + priv->is_dev_ref_clk_enabled = enable; + } +} + +/** + * ufs_qcom_init - bind phy with controller + * @hba: host controller instance + * + * 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) +{ + struct ufs_qcom_priv *priv = dev_get_priv(hba->dev); + int err; + + priv->hba = hba; + + /* setup clocks */ + ufs_qcom_setup_clocks(hba, true, PRE_CHANGE); + + if (priv->hw_ver.major >= 0x4) + ufshcd_dme_set(hba, + UIC_ARG_MIB(PA_TXHSADAPTTYPE), + PA_NO_ADAPT); + + ufs_qcom_setup_clocks(hba, true, POST_CHANGE); + + ufs_qcom_get_controller_revision(hba, &priv->hw_ver.major, + &priv->hw_ver.minor, + &priv->hw_ver.step); + dev_info(hba->dev, "Qcom UFS HC version: %d.%d.%d\n", + priv->hw_ver.major, + priv->hw_ver.minor, + priv->hw_ver.step); + + err = ufs_qcom_init_clks(priv); + if (err) { + dev_err(hba->dev, "failed to initialize clocks, err:%d\n", err); + return err; + } + + ufs_qcom_advertise_quirks(hba); + ufs_qcom_setup_clocks(hba, true, POST_CHANGE); + + return 0; +} + +/** + * 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_priv *priv = dev_get_priv(hba->dev); + + if (!dm_gpio_is_valid(&priv->reset)) + return 0; + + /* + * The UFS device shall detect reset pulses of 1us, sleep for 10us to + * be on the safe side. + */ + dm_gpio_set_value(&priv->reset, true); + udelay(10); + + dm_gpio_set_value(&priv->reset, false); + udelay(10); + + return 0; +} + +static struct ufs_hba_ops ufs_qcom_hba_ops = { + .init = ufs_qcom_init, + .get_max_pwr_mode = ufs_get_max_pwr_mode, + .hce_enable_notify = ufs_qcom_hce_enable_notify, + .link_startup_notify = ufs_qcom_link_startup_notify, + .device_reset = ufs_qcom_device_reset, +}; + +static int ufs_qcom_probe(struct udevice *dev) +{ + struct ufs_qcom_priv *priv = dev_get_priv(dev); + int ret; + + /* get resets */ + ret = reset_get_by_name(dev, "rst", &priv->core_reset); + if (ret) { + dev_err(dev, "failed to get reset, ret:%d\n", ret); + return ret; + } + + ret = gpio_request_by_name(dev, "reset-gpios", 0, &priv->reset, GPIOD_IS_OUT); + if (ret) { + dev_err(dev, "Warning: cannot get reset GPIO\n"); + } + + ret = ufshcd_probe(dev, &ufs_qcom_hba_ops); + if (ret) { + dev_err(dev, "ufshcd_probe() failed, ret:%d\n", ret); + return ret; + } + + return 0; +} + +static int ufs_qcom_bind(struct udevice *dev) +{ + struct udevice *scsi_dev; + + return ufs_scsi_bind(dev, &scsi_dev); +} + +static const struct udevice_id ufs_qcom_ids[] = { + { .compatible = "qcom,ufshc" }, + {}, +}; + +U_BOOT_DRIVER(qcom_ufshcd) = { + .name = "qcom-ufshcd", + .id = UCLASS_UFS, + .of_match = ufs_qcom_ids, + .probe = ufs_qcom_probe, + .bind = ufs_qcom_bind, + .priv_auto = sizeof(struct ufs_qcom_priv), +}; diff --git a/drivers/ufs/ufs-qcom.h b/drivers/ufs/ufs-qcom.h new file mode 100644 index 00000000000..de957ae60f3 --- /dev/null +++ b/drivers/ufs/ufs-qcom.h @@ -0,0 +1,147 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* Copyright (c) 2013-2015, The Linux Foundation. All rights reserved. + */ + +#ifndef UFS_QCOM_H_ +#define UFS_QCOM_H_ + +#include <reset.h> +#include <linux/bitfield.h> + +#define MPHY_TX_FSM_STATE 0x41 +#define TX_FSM_HIBERN8 0x1 +#define DEFAULT_CLK_RATE_HZ 1000000 + +#define UFS_HW_VER_MAJOR_MASK GENMASK(31, 28) +#define UFS_HW_VER_MINOR_MASK GENMASK(27, 16) +#define UFS_HW_VER_STEP_MASK GENMASK(15, 0) + +/* QCOM UFS host controller vendor specific registers */ +enum { + REG_UFS_SYS1CLK_1US = 0xC0, + REG_UFS_TX_SYMBOL_CLK_NS_US = 0xC4, + REG_UFS_LOCAL_PORT_ID_REG = 0xC8, + REG_UFS_PA_ERR_CODE = 0xCC, + /* On older UFS revisions, this register is called "RETRY_TIMER_REG" */ + REG_UFS_PARAM0 = 0xD0, + /* On older UFS revisions, this register is called "REG_UFS_PA_LINK_STARTUP_TIMER" */ + REG_UFS_CFG0 = 0xD8, + REG_UFS_CFG1 = 0xDC, + REG_UFS_CFG2 = 0xE0, + REG_UFS_HW_VERSION = 0xE4, + + UFS_TEST_BUS = 0xE8, + UFS_TEST_BUS_CTRL_0 = 0xEC, + UFS_TEST_BUS_CTRL_1 = 0xF0, + UFS_TEST_BUS_CTRL_2 = 0xF4, + UFS_UNIPRO_CFG = 0xF8, + + /* + * QCOM UFS host controller vendor specific registers + * added in HW Version 3.0.0 + */ + UFS_AH8_CFG = 0xFC, + + REG_UFS_CFG3 = 0x271C, +}; + +/* bit definitions for REG_UFS_CFG0 register */ +#define QUNIPRO_G4_SEL BIT(5) + +/* bit definitions for REG_UFS_CFG1 register */ +#define QUNIPRO_SEL BIT(0) +#define UFS_PHY_SOFT_RESET BIT(1) +#define UTP_DBG_RAMS_EN BIT(17) +#define TEST_BUS_EN BIT(18) +#define TEST_BUS_SEL GENMASK(22, 19) +#define UFS_REG_TEST_BUS_EN BIT(30) + +#define UFS_PHY_RESET_ENABLE 1 +#define UFS_PHY_RESET_DISABLE 0 + +/* bit definitions for REG_UFS_CFG2 register */ +#define UAWM_HW_CGC_EN BIT(0) +#define UARM_HW_CGC_EN BIT(1) +#define TXUC_HW_CGC_EN BIT(2) +#define RXUC_HW_CGC_EN BIT(3) +#define DFC_HW_CGC_EN BIT(4) +#define TRLUT_HW_CGC_EN BIT(5) +#define TMRLUT_HW_CGC_EN BIT(6) +#define OCSC_HW_CGC_EN BIT(7) + +/* bit definitions for REG_UFS_PARAM0 */ +#define MAX_HS_GEAR_MASK GENMASK(6, 4) +#define UFS_QCOM_MAX_GEAR(x) FIELD_GET(MAX_HS_GEAR_MASK, (x)) + +/* bit definition for UFS_UFS_TEST_BUS_CTRL_n */ +#define TEST_BUS_SUB_SEL_MASK GENMASK(4, 0) /* All XXX_SEL fields are 5 bits wide */ + +#define REG_UFS_CFG2_CGC_EN_ALL (UAWM_HW_CGC_EN | UARM_HW_CGC_EN |\ + TXUC_HW_CGC_EN | RXUC_HW_CGC_EN |\ + DFC_HW_CGC_EN | TRLUT_HW_CGC_EN |\ + TMRLUT_HW_CGC_EN | OCSC_HW_CGC_EN) + +/* bit offset */ +#define OFFSET_CLK_NS_REG 0xa + +/* bit masks */ +#define MASK_TX_SYMBOL_CLK_1US_REG GENMASK(9, 0) +#define MASK_CLK_NS_REG GENMASK(23, 10) + +/* QUniPro Vendor specific attributes */ +#define PA_VS_CONFIG_REG1 0x9000 +#define DME_VS_CORE_CLK_CTRL 0xD002 +/* bit and mask definitions for DME_VS_CORE_CLK_CTRL attribute */ +#define CLK_1US_CYCLES_MASK_V4 GENMASK(27, 16) +#define CLK_1US_CYCLES_MASK GENMASK(7, 0) +#define DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT BIT(8) +#define PA_VS_CORE_CLK_40NS_CYCLES 0x9007 +#define PA_VS_CORE_CLK_40NS_CYCLES_MASK GENMASK(6, 0) + +/* QCOM UFS host controller core clk frequencies */ +#define UNIPRO_CORE_CLK_FREQ_37_5_MHZ 38 +#define UNIPRO_CORE_CLK_FREQ_75_MHZ 75 +#define UNIPRO_CORE_CLK_FREQ_100_MHZ 100 +#define UNIPRO_CORE_CLK_FREQ_150_MHZ 150 +#define UNIPRO_CORE_CLK_FREQ_300_MHZ 300 +#define UNIPRO_CORE_CLK_FREQ_201_5_MHZ 202 +#define UNIPRO_CORE_CLK_FREQ_403_MHZ 403 + +static inline void +ufs_qcom_get_controller_revision(struct ufs_hba *hba, + u8 *major, u16 *minor, u16 *step) +{ + u32 ver = ufshcd_readl(hba, REG_UFS_HW_VERSION); + + *major = FIELD_GET(UFS_HW_VER_MAJOR_MASK, ver); + *minor = FIELD_GET(UFS_HW_VER_MINOR_MASK, ver); + *step = FIELD_GET(UFS_HW_VER_STEP_MASK, ver); +}; + +/* Host controller hardware version: major.minor.step */ +struct ufs_hw_version { + u16 step; + u16 minor; + u8 major; +}; + +struct gpio_desc; + +struct ufs_qcom_priv { + struct phy *generic_phy; + struct ufs_hba *hba; + + struct clk_bulk clks; + bool is_clks_enabled; + + struct ufs_hw_version hw_ver; + + /* Reset control of HCI */ + struct reset_ctl core_reset; + + struct gpio_desc reset; + + bool is_dev_ref_clk_enabled; +}; + +#endif /* UFS_QCOM_H_ */ diff --git a/drivers/ufs/unipro.h b/drivers/ufs/unipro.h index b30b17fa5ad..52db6324b4a 100644 --- a/drivers/ufs/unipro.h +++ b/drivers/ufs/unipro.h @@ -140,6 +140,12 @@ #define PA_SLEEPNOCONFIGTIME 0x15A2 #define PA_STALLNOCONFIGTIME 0x15A3 #define PA_SAVECONFIGTIME 0x15A4 +#define PA_TXHSADAPTTYPE 0x15D4 + +/* Adapt type for PA_TXHSADAPTTYPE attribute */ +#define PA_REFRESH_ADAPT 0x00 +#define PA_INITIAL_ADAPT 0x01 +#define PA_NO_ADAPT 0x03

#define PA_TACTIVATE_TIME_UNIT_US 10 #define PA_HIBERN8_TIME_UNIT_US 100