diff options
Diffstat (limited to 'drivers/scsi/ufs/ufs-qcom.h')
| -rw-r--r-- | drivers/scsi/ufs/ufs-qcom.h | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/drivers/scsi/ufs/ufs-qcom.h b/drivers/scsi/ufs/ufs-qcom.h new file mode 100644 index 00000000000..9a6febd007d --- /dev/null +++ b/drivers/scsi/ufs/ufs-qcom.h @@ -0,0 +1,170 @@ +/* Copyright (c) 2013-2015, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#ifndef UFS_QCOM_H_ +#define UFS_QCOM_H_ + +#define MAX_UFS_QCOM_HOSTS 1 +#define MAX_U32 (~(u32)0) +#define MPHY_TX_FSM_STATE 0x41 +#define TX_FSM_HIBERN8 0x1 +#define HBRN8_POLL_TOUT_MS 100 +#define DEFAULT_CLK_RATE_HZ 1000000 +#define BUS_VECTOR_NAME_LEN 32 + +#define UFS_HW_VER_MAJOR_SHFT (28) +#define UFS_HW_VER_MAJOR_MASK (0x000F << UFS_HW_VER_MAJOR_SHFT) +#define UFS_HW_VER_MINOR_SHFT (16) +#define UFS_HW_VER_MINOR_MASK (0x0FFF << UFS_HW_VER_MINOR_SHFT) +#define UFS_HW_VER_STEP_SHFT (0) +#define UFS_HW_VER_STEP_MASK (0xFFFF << UFS_HW_VER_STEP_SHFT) + +/* vendor specific pre-defined parameters */ +#define SLOW 1 +#define FAST 2 + +#define UFS_QCOM_LIMIT_NUM_LANES_RX 2 +#define UFS_QCOM_LIMIT_NUM_LANES_TX 2 +#define UFS_QCOM_LIMIT_HSGEAR_RX UFS_HS_G2 +#define UFS_QCOM_LIMIT_HSGEAR_TX UFS_HS_G2 +#define UFS_QCOM_LIMIT_PWMGEAR_RX UFS_PWM_G4 +#define UFS_QCOM_LIMIT_PWMGEAR_TX UFS_PWM_G4 +#define UFS_QCOM_LIMIT_RX_PWR_PWM SLOW_MODE +#define UFS_QCOM_LIMIT_TX_PWR_PWM SLOW_MODE +#define UFS_QCOM_LIMIT_RX_PWR_HS FAST_MODE +#define UFS_QCOM_LIMIT_TX_PWR_HS FAST_MODE +#define UFS_QCOM_LIMIT_HS_RATE PA_HS_MODE_B +#define UFS_QCOM_LIMIT_DESIRED_MODE FAST + +/* 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, + REG_UFS_RETRY_TIMER_REG = 0xD0, + REG_UFS_PA_LINK_STARTUP_TIMER = 0xD8, + REG_UFS_CFG1 = 0xDC, + REG_UFS_CFG2 = 0xE0, + REG_UFS_HW_VERSION = 0xE4, + + UFS_DBG_RD_REG_UAWM = 0x100, + UFS_DBG_RD_REG_UARM = 0x200, + UFS_DBG_RD_REG_TXUC = 0x300, + UFS_DBG_RD_REG_RXUC = 0x400, + UFS_DBG_RD_REG_DFC = 0x500, + UFS_DBG_RD_REG_TRLUT = 0x600, + UFS_DBG_RD_REG_TMRLUT = 0x700, + UFS_UFS_DBG_RD_REG_OCSC = 0x800, + + UFS_UFS_DBG_RD_DESC_RAM = 0x1500, + UFS_UFS_DBG_RD_PRDT_RAM = 0x1700, + UFS_UFS_DBG_RD_RESP_RAM = 0x1800, + UFS_UFS_DBG_RD_EDTL_RAM = 0x1900, +}; + +/* bit definitions for REG_UFS_CFG2 register */ +#define UAWM_HW_CGC_EN (1 << 0) +#define UARM_HW_CGC_EN (1 << 1) +#define TXUC_HW_CGC_EN (1 << 2) +#define RXUC_HW_CGC_EN (1 << 3) +#define DFC_HW_CGC_EN (1 << 4) +#define TRLUT_HW_CGC_EN (1 << 5) +#define TMRLUT_HW_CGC_EN (1 << 6) +#define OCSC_HW_CGC_EN (1 << 7) + +#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 */ +enum { + OFFSET_UFS_PHY_SOFT_RESET = 1, + OFFSET_CLK_NS_REG = 10, +}; + +/* bit masks */ +enum { + MASK_UFS_PHY_SOFT_RESET = 0x2, + MASK_TX_SYMBOL_CLK_1US_REG = 0x3FF, + MASK_CLK_NS_REG = 0xFFFC00, +}; + +enum ufs_qcom_phy_init_type { + UFS_PHY_INIT_FULL, + UFS_PHY_INIT_CFG_RESTORE, +}; + +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 = (ver & UFS_HW_VER_MAJOR_MASK) >> UFS_HW_VER_MAJOR_SHFT; + *minor = (ver & UFS_HW_VER_MINOR_MASK) >> UFS_HW_VER_MINOR_SHFT; + *step = (ver & UFS_HW_VER_STEP_MASK) >> UFS_HW_VER_STEP_SHFT; +}; + +static inline void ufs_qcom_assert_reset(struct ufs_hba *hba) +{ + ufshcd_rmwl(hba, MASK_UFS_PHY_SOFT_RESET, + 1 << OFFSET_UFS_PHY_SOFT_RESET, REG_UFS_CFG1); + + /* + * Make sure assertion of ufs phy reset is written to + * register before returning + */ + mb(); +} + +static inline void ufs_qcom_deassert_reset(struct ufs_hba *hba) +{ + ufshcd_rmwl(hba, MASK_UFS_PHY_SOFT_RESET, + 0 << OFFSET_UFS_PHY_SOFT_RESET, REG_UFS_CFG1); + + /* + * Make sure de-assertion of ufs phy reset is written to + * register before returning + */ + mb(); +} + +struct ufs_qcom_bus_vote { + uint32_t client_handle; + uint32_t curr_vote; + int min_bw_vote; + int max_bw_vote; + int saved_vote; + bool is_max_bw_needed; + struct device_attribute max_bus_bw; +}; + +struct ufs_qcom_host { + struct phy *generic_phy; + struct ufs_hba *hba; + struct ufs_qcom_bus_vote bus_vote; + struct ufs_pa_layer_attr dev_req_params; + struct clk *rx_l0_sync_clk; + struct clk *tx_l0_sync_clk; + struct clk *rx_l1_sync_clk; + struct clk *tx_l1_sync_clk; + bool is_lane_clks_enabled; +}; + +#define ufs_qcom_is_link_off(hba) ufshcd_is_link_off(hba) +#define ufs_qcom_is_link_active(hba) ufshcd_is_link_active(hba) +#define ufs_qcom_is_link_hibern8(hba) ufshcd_is_link_hibern8(hba) + +#endif /* UFS_QCOM_H_ */ |