forked from Minki/linux
b8416b2fed
The UFS_RESET pin on Qualcomm SoCs are controlled by TLMM and exposed through the GPIO framework. Acquire the device-reset GPIO and use this to implement the device_reset vops, to allow resetting the attached memory. Based on downstream support implemented by Subhash Jadavani <subhashj@codeaurora.org>. Link: https://lore.kernel.org/r/20190828191756.24312-3-bjorn.andersson@linaro.org Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Acked-by: Rob Herring <robh@kernel.org> Acked-by: Avri Altman <Avri.Altman@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
265 lines
7.2 KiB
C
265 lines
7.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/* Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
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*/
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#ifndef UFS_QCOM_H_
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#define UFS_QCOM_H_
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#include <linux/reset-controller.h>
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#define MAX_UFS_QCOM_HOSTS 1
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#define MAX_U32 (~(u32)0)
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#define MPHY_TX_FSM_STATE 0x41
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#define TX_FSM_HIBERN8 0x1
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#define HBRN8_POLL_TOUT_MS 100
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#define DEFAULT_CLK_RATE_HZ 1000000
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#define BUS_VECTOR_NAME_LEN 32
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#define UFS_HW_VER_MAJOR_SHFT (28)
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#define UFS_HW_VER_MAJOR_MASK (0x000F << UFS_HW_VER_MAJOR_SHFT)
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#define UFS_HW_VER_MINOR_SHFT (16)
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#define UFS_HW_VER_MINOR_MASK (0x0FFF << UFS_HW_VER_MINOR_SHFT)
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#define UFS_HW_VER_STEP_SHFT (0)
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#define UFS_HW_VER_STEP_MASK (0xFFFF << UFS_HW_VER_STEP_SHFT)
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/* vendor specific pre-defined parameters */
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#define SLOW 1
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#define FAST 2
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#define UFS_QCOM_LIMIT_NUM_LANES_RX 2
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#define UFS_QCOM_LIMIT_NUM_LANES_TX 2
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#define UFS_QCOM_LIMIT_HSGEAR_RX UFS_HS_G3
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#define UFS_QCOM_LIMIT_HSGEAR_TX UFS_HS_G3
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#define UFS_QCOM_LIMIT_PWMGEAR_RX UFS_PWM_G4
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#define UFS_QCOM_LIMIT_PWMGEAR_TX UFS_PWM_G4
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#define UFS_QCOM_LIMIT_RX_PWR_PWM SLOW_MODE
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#define UFS_QCOM_LIMIT_TX_PWR_PWM SLOW_MODE
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#define UFS_QCOM_LIMIT_RX_PWR_HS FAST_MODE
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#define UFS_QCOM_LIMIT_TX_PWR_HS FAST_MODE
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#define UFS_QCOM_LIMIT_HS_RATE PA_HS_MODE_B
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#define UFS_QCOM_LIMIT_DESIRED_MODE FAST
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/* QCOM UFS host controller vendor specific registers */
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enum {
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REG_UFS_SYS1CLK_1US = 0xC0,
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REG_UFS_TX_SYMBOL_CLK_NS_US = 0xC4,
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REG_UFS_LOCAL_PORT_ID_REG = 0xC8,
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REG_UFS_PA_ERR_CODE = 0xCC,
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REG_UFS_RETRY_TIMER_REG = 0xD0,
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REG_UFS_PA_LINK_STARTUP_TIMER = 0xD8,
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REG_UFS_CFG1 = 0xDC,
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REG_UFS_CFG2 = 0xE0,
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REG_UFS_HW_VERSION = 0xE4,
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UFS_TEST_BUS = 0xE8,
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UFS_TEST_BUS_CTRL_0 = 0xEC,
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UFS_TEST_BUS_CTRL_1 = 0xF0,
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UFS_TEST_BUS_CTRL_2 = 0xF4,
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UFS_UNIPRO_CFG = 0xF8,
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/*
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* QCOM UFS host controller vendor specific registers
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* added in HW Version 3.0.0
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*/
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UFS_AH8_CFG = 0xFC,
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};
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/* QCOM UFS host controller vendor specific debug registers */
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enum {
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UFS_DBG_RD_REG_UAWM = 0x100,
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UFS_DBG_RD_REG_UARM = 0x200,
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UFS_DBG_RD_REG_TXUC = 0x300,
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UFS_DBG_RD_REG_RXUC = 0x400,
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UFS_DBG_RD_REG_DFC = 0x500,
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UFS_DBG_RD_REG_TRLUT = 0x600,
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UFS_DBG_RD_REG_TMRLUT = 0x700,
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UFS_UFS_DBG_RD_REG_OCSC = 0x800,
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UFS_UFS_DBG_RD_DESC_RAM = 0x1500,
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UFS_UFS_DBG_RD_PRDT_RAM = 0x1700,
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UFS_UFS_DBG_RD_RESP_RAM = 0x1800,
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UFS_UFS_DBG_RD_EDTL_RAM = 0x1900,
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};
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#define UFS_CNTLR_2_x_x_VEN_REGS_OFFSET(x) (0x000 + x)
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#define UFS_CNTLR_3_x_x_VEN_REGS_OFFSET(x) (0x400 + x)
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/* bit definitions for REG_UFS_CFG1 register */
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#define QUNIPRO_SEL 0x1
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#define UTP_DBG_RAMS_EN 0x20000
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#define TEST_BUS_EN BIT(18)
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#define TEST_BUS_SEL GENMASK(22, 19)
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#define UFS_REG_TEST_BUS_EN BIT(30)
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/* bit definitions for REG_UFS_CFG2 register */
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#define UAWM_HW_CGC_EN (1 << 0)
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#define UARM_HW_CGC_EN (1 << 1)
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#define TXUC_HW_CGC_EN (1 << 2)
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#define RXUC_HW_CGC_EN (1 << 3)
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#define DFC_HW_CGC_EN (1 << 4)
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#define TRLUT_HW_CGC_EN (1 << 5)
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#define TMRLUT_HW_CGC_EN (1 << 6)
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#define OCSC_HW_CGC_EN (1 << 7)
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/* bit definition for UFS_UFS_TEST_BUS_CTRL_n */
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#define TEST_BUS_SUB_SEL_MASK 0x1F /* All XXX_SEL fields are 5 bits wide */
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#define REG_UFS_CFG2_CGC_EN_ALL (UAWM_HW_CGC_EN | UARM_HW_CGC_EN |\
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TXUC_HW_CGC_EN | RXUC_HW_CGC_EN |\
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DFC_HW_CGC_EN | TRLUT_HW_CGC_EN |\
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TMRLUT_HW_CGC_EN | OCSC_HW_CGC_EN)
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/* bit offset */
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enum {
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OFFSET_UFS_PHY_SOFT_RESET = 1,
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OFFSET_CLK_NS_REG = 10,
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};
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/* bit masks */
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enum {
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MASK_UFS_PHY_SOFT_RESET = 0x2,
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MASK_TX_SYMBOL_CLK_1US_REG = 0x3FF,
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MASK_CLK_NS_REG = 0xFFFC00,
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};
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/* QCOM UFS debug print bit mask */
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#define UFS_QCOM_DBG_PRINT_REGS_EN BIT(0)
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#define UFS_QCOM_DBG_PRINT_ICE_REGS_EN BIT(1)
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#define UFS_QCOM_DBG_PRINT_TEST_BUS_EN BIT(2)
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#define UFS_QCOM_DBG_PRINT_ALL \
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(UFS_QCOM_DBG_PRINT_REGS_EN | UFS_QCOM_DBG_PRINT_ICE_REGS_EN | \
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UFS_QCOM_DBG_PRINT_TEST_BUS_EN)
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/* QUniPro Vendor specific attributes */
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#define PA_VS_CONFIG_REG1 0x9000
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#define DME_VS_CORE_CLK_CTRL 0xD002
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/* bit and mask definitions for DME_VS_CORE_CLK_CTRL attribute */
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#define DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT BIT(8)
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#define DME_VS_CORE_CLK_CTRL_MAX_CORE_CLK_1US_CYCLES_MASK 0xFF
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static inline void
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ufs_qcom_get_controller_revision(struct ufs_hba *hba,
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u8 *major, u16 *minor, u16 *step)
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{
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u32 ver = ufshcd_readl(hba, REG_UFS_HW_VERSION);
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*major = (ver & UFS_HW_VER_MAJOR_MASK) >> UFS_HW_VER_MAJOR_SHFT;
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*minor = (ver & UFS_HW_VER_MINOR_MASK) >> UFS_HW_VER_MINOR_SHFT;
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*step = (ver & UFS_HW_VER_STEP_MASK) >> UFS_HW_VER_STEP_SHFT;
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};
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static inline void ufs_qcom_assert_reset(struct ufs_hba *hba)
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{
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ufshcd_rmwl(hba, MASK_UFS_PHY_SOFT_RESET,
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1 << OFFSET_UFS_PHY_SOFT_RESET, REG_UFS_CFG1);
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/*
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* Make sure assertion of ufs phy reset is written to
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* register before returning
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*/
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mb();
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}
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static inline void ufs_qcom_deassert_reset(struct ufs_hba *hba)
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{
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ufshcd_rmwl(hba, MASK_UFS_PHY_SOFT_RESET,
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0 << OFFSET_UFS_PHY_SOFT_RESET, REG_UFS_CFG1);
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/*
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* Make sure de-assertion of ufs phy reset is written to
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* register before returning
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*/
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mb();
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}
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struct ufs_qcom_bus_vote {
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uint32_t client_handle;
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uint32_t curr_vote;
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int min_bw_vote;
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int max_bw_vote;
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int saved_vote;
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bool is_max_bw_needed;
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struct device_attribute max_bus_bw;
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};
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/* Host controller hardware version: major.minor.step */
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struct ufs_hw_version {
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u16 step;
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u16 minor;
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u8 major;
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};
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struct ufs_qcom_testbus {
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u8 select_major;
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u8 select_minor;
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};
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struct gpio_desc;
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struct ufs_qcom_host {
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/*
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* Set this capability if host controller supports the QUniPro mode
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* and if driver wants the Host controller to operate in QUniPro mode.
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* Note: By default this capability will be kept enabled if host
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* controller supports the QUniPro mode.
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*/
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#define UFS_QCOM_CAP_QUNIPRO 0x1
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/*
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* Set this capability if host controller can retain the secure
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* configuration even after UFS controller core power collapse.
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*/
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#define UFS_QCOM_CAP_RETAIN_SEC_CFG_AFTER_PWR_COLLAPSE 0x2
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u32 caps;
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struct phy *generic_phy;
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struct ufs_hba *hba;
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struct ufs_qcom_bus_vote bus_vote;
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struct ufs_pa_layer_attr dev_req_params;
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struct clk *rx_l0_sync_clk;
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struct clk *tx_l0_sync_clk;
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struct clk *rx_l1_sync_clk;
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struct clk *tx_l1_sync_clk;
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bool is_lane_clks_enabled;
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void __iomem *dev_ref_clk_ctrl_mmio;
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bool is_dev_ref_clk_enabled;
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struct ufs_hw_version hw_ver;
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u32 dev_ref_clk_en_mask;
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/* Bitmask for enabling debug prints */
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u32 dbg_print_en;
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struct ufs_qcom_testbus testbus;
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struct reset_controller_dev rcdev;
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struct gpio_desc *device_reset;
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};
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static inline u32
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ufs_qcom_get_debug_reg_offset(struct ufs_qcom_host *host, u32 reg)
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{
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if (host->hw_ver.major <= 0x02)
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return UFS_CNTLR_2_x_x_VEN_REGS_OFFSET(reg);
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return UFS_CNTLR_3_x_x_VEN_REGS_OFFSET(reg);
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};
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#define ufs_qcom_is_link_off(hba) ufshcd_is_link_off(hba)
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#define ufs_qcom_is_link_active(hba) ufshcd_is_link_active(hba)
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#define ufs_qcom_is_link_hibern8(hba) ufshcd_is_link_hibern8(hba)
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int ufs_qcom_testbus_config(struct ufs_qcom_host *host);
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static inline bool ufs_qcom_cap_qunipro(struct ufs_qcom_host *host)
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{
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if (host->caps & UFS_QCOM_CAP_QUNIPRO)
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return true;
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else
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return false;
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}
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#endif /* UFS_QCOM_H_ */
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