| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * UFS Host Controller driver for Exynos specific extensions |
| * |
| * Copyright (C) 2014-2015 Samsung Electronics Co., Ltd. |
| * Author: Seungwon Jeon <essuuj@gmail.com> |
| * Author: Alim Akhtar <alim.akhtar@samsung.com> |
| * |
| */ |
| |
| #include <linux/clk.h> |
| #include <linux/module.h> |
| #include <linux/of.h> |
| #include <linux/of_address.h> |
| #include <linux/phy/phy.h> |
| #include <linux/platform_device.h> |
| |
| #include "ufshcd.h" |
| #include "ufshcd-pltfrm.h" |
| #include "ufshci.h" |
| #include "unipro.h" |
| |
| #include "ufs-exynos.h" |
| |
| /* |
| * Exynos's Vendor specific registers for UFSHCI |
| */ |
| #define HCI_TXPRDT_ENTRY_SIZE 0x00 |
| #define PRDT_PREFECT_EN BIT(31) |
| #define PRDT_SET_SIZE(x) ((x) & 0x1F) |
| #define HCI_RXPRDT_ENTRY_SIZE 0x04 |
| #define HCI_1US_TO_CNT_VAL 0x0C |
| #define CNT_VAL_1US_MASK 0x3FF |
| #define HCI_UTRL_NEXUS_TYPE 0x40 |
| #define HCI_UTMRL_NEXUS_TYPE 0x44 |
| #define HCI_SW_RST 0x50 |
| #define UFS_LINK_SW_RST BIT(0) |
| #define UFS_UNIPRO_SW_RST BIT(1) |
| #define UFS_SW_RST_MASK (UFS_UNIPRO_SW_RST | UFS_LINK_SW_RST) |
| #define HCI_DATA_REORDER 0x60 |
| #define HCI_UNIPRO_APB_CLK_CTRL 0x68 |
| #define UNIPRO_APB_CLK(v, x) (((v) & ~0xF) | ((x) & 0xF)) |
| #define HCI_AXIDMA_RWDATA_BURST_LEN 0x6C |
| #define HCI_GPIO_OUT 0x70 |
| #define HCI_ERR_EN_PA_LAYER 0x78 |
| #define HCI_ERR_EN_DL_LAYER 0x7C |
| #define HCI_ERR_EN_N_LAYER 0x80 |
| #define HCI_ERR_EN_T_LAYER 0x84 |
| #define HCI_ERR_EN_DME_LAYER 0x88 |
| #define HCI_CLKSTOP_CTRL 0xB0 |
| #define REFCLK_STOP BIT(2) |
| #define UNIPRO_MCLK_STOP BIT(1) |
| #define UNIPRO_PCLK_STOP BIT(0) |
| #define CLK_STOP_MASK (REFCLK_STOP |\ |
| UNIPRO_MCLK_STOP |\ |
| UNIPRO_PCLK_STOP) |
| #define HCI_MISC 0xB4 |
| #define REFCLK_CTRL_EN BIT(7) |
| #define UNIPRO_PCLK_CTRL_EN BIT(6) |
| #define UNIPRO_MCLK_CTRL_EN BIT(5) |
| #define HCI_CORECLK_CTRL_EN BIT(4) |
| #define CLK_CTRL_EN_MASK (REFCLK_CTRL_EN |\ |
| UNIPRO_PCLK_CTRL_EN |\ |
| UNIPRO_MCLK_CTRL_EN) |
| /* Device fatal error */ |
| #define DFES_ERR_EN BIT(31) |
| #define DFES_DEF_L2_ERRS (UIC_DATA_LINK_LAYER_ERROR_RX_BUF_OF |\ |
| UIC_DATA_LINK_LAYER_ERROR_PA_INIT) |
| #define DFES_DEF_L3_ERRS (UIC_NETWORK_UNSUPPORTED_HEADER_TYPE |\ |
| UIC_NETWORK_BAD_DEVICEID_ENC |\ |
| UIC_NETWORK_LHDR_TRAP_PACKET_DROPPING) |
| #define DFES_DEF_L4_ERRS (UIC_TRANSPORT_UNSUPPORTED_HEADER_TYPE |\ |
| UIC_TRANSPORT_UNKNOWN_CPORTID |\ |
| UIC_TRANSPORT_NO_CONNECTION_RX |\ |
| UIC_TRANSPORT_BAD_TC) |
| |
| enum { |
| UNIPRO_L1_5 = 0,/* PHY Adapter */ |
| UNIPRO_L2, /* Data Link */ |
| UNIPRO_L3, /* Network */ |
| UNIPRO_L4, /* Transport */ |
| UNIPRO_DME, /* DME */ |
| }; |
| |
| /* |
| * UNIPRO registers |
| */ |
| #define UNIPRO_COMP_VERSION 0x000 |
| #define UNIPRO_DME_PWR_REQ 0x090 |
| #define UNIPRO_DME_PWR_REQ_POWERMODE 0x094 |
| #define UNIPRO_DME_PWR_REQ_LOCALL2TIMER0 0x098 |
| #define UNIPRO_DME_PWR_REQ_LOCALL2TIMER1 0x09C |
| #define UNIPRO_DME_PWR_REQ_LOCALL2TIMER2 0x0A0 |
| #define UNIPRO_DME_PWR_REQ_REMOTEL2TIMER0 0x0A4 |
| #define UNIPRO_DME_PWR_REQ_REMOTEL2TIMER1 0x0A8 |
| #define UNIPRO_DME_PWR_REQ_REMOTEL2TIMER2 0x0AC |
| |
| /* |
| * UFS Protector registers |
| */ |
| #define UFSPRSECURITY 0x010 |
| #define NSSMU BIT(14) |
| #define UFSPSBEGIN0 0x200 |
| #define UFSPSEND0 0x204 |
| #define UFSPSLUN0 0x208 |
| #define UFSPSCTRL0 0x20C |
| |
| #define CNTR_DIV_VAL 40 |
| |
| static void exynos_ufs_auto_ctrl_hcc(struct exynos_ufs *ufs, bool en); |
| static void exynos_ufs_ctrl_clkstop(struct exynos_ufs *ufs, bool en); |
| |
| static inline void exynos_ufs_enable_auto_ctrl_hcc(struct exynos_ufs *ufs) |
| { |
| exynos_ufs_auto_ctrl_hcc(ufs, true); |
| } |
| |
| static inline void exynos_ufs_disable_auto_ctrl_hcc(struct exynos_ufs *ufs) |
| { |
| exynos_ufs_auto_ctrl_hcc(ufs, false); |
| } |
| |
| static inline void exynos_ufs_disable_auto_ctrl_hcc_save( |
| struct exynos_ufs *ufs, u32 *val) |
| { |
| *val = hci_readl(ufs, HCI_MISC); |
| exynos_ufs_auto_ctrl_hcc(ufs, false); |
| } |
| |
| static inline void exynos_ufs_auto_ctrl_hcc_restore( |
| struct exynos_ufs *ufs, u32 *val) |
| { |
| hci_writel(ufs, *val, HCI_MISC); |
| } |
| |
| static inline void exynos_ufs_gate_clks(struct exynos_ufs *ufs) |
| { |
| exynos_ufs_ctrl_clkstop(ufs, true); |
| } |
| |
| static inline void exynos_ufs_ungate_clks(struct exynos_ufs *ufs) |
| { |
| exynos_ufs_ctrl_clkstop(ufs, false); |
| } |
| |
| static int exynos7_ufs_drv_init(struct device *dev, struct exynos_ufs *ufs) |
| { |
| return 0; |
| } |
| |
| static int exynos7_ufs_pre_link(struct exynos_ufs *ufs) |
| { |
| struct ufs_hba *hba = ufs->hba; |
| u32 val = ufs->drv_data->uic_attr->pa_dbg_option_suite; |
| int i; |
| |
| exynos_ufs_enable_ov_tm(hba); |
| for_each_ufs_tx_lane(ufs, i) |
| ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(0x297, i), 0x17); |
| for_each_ufs_rx_lane(ufs, i) { |
| ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(0x362, i), 0xff); |
| ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(0x363, i), 0x00); |
| } |
| exynos_ufs_disable_ov_tm(hba); |
| |
| for_each_ufs_tx_lane(ufs, i) |
| ufshcd_dme_set(hba, |
| UIC_ARG_MIB_SEL(TX_HIBERN8_CONTROL, i), 0x0); |
| ufshcd_dme_set(hba, UIC_ARG_MIB(PA_DBG_TXPHY_CFGUPDT), 0x1); |
| udelay(1); |
| ufshcd_dme_set(hba, UIC_ARG_MIB(PA_DBG_OPTION_SUITE), val | (1 << 12)); |
| ufshcd_dme_set(hba, UIC_ARG_MIB(PA_DBG_SKIP_RESET_PHY), 0x1); |
| ufshcd_dme_set(hba, UIC_ARG_MIB(PA_DBG_SKIP_LINE_RESET), 0x1); |
| ufshcd_dme_set(hba, UIC_ARG_MIB(PA_DBG_LINE_RESET_REQ), 0x1); |
| udelay(1600); |
| ufshcd_dme_set(hba, UIC_ARG_MIB(PA_DBG_OPTION_SUITE), val); |
| |
| return 0; |
| } |
| |
| static int exynos7_ufs_post_link(struct exynos_ufs *ufs) |
| { |
| struct ufs_hba *hba = ufs->hba; |
| int i; |
| |
| exynos_ufs_enable_ov_tm(hba); |
| for_each_ufs_tx_lane(ufs, i) { |
| ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(0x28b, i), 0x83); |
| ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(0x29a, i), 0x07); |
| ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(0x277, i), |
| TX_LINERESET_N(exynos_ufs_calc_time_cntr(ufs, 200000))); |
| } |
| exynos_ufs_disable_ov_tm(hba); |
| |
| exynos_ufs_enable_dbg_mode(hba); |
| ufshcd_dme_set(hba, UIC_ARG_MIB(PA_SAVECONFIGTIME), 0xbb8); |
| exynos_ufs_disable_dbg_mode(hba); |
| |
| return 0; |
| } |
| |
| static int exynos7_ufs_pre_pwr_change(struct exynos_ufs *ufs, |
| struct ufs_pa_layer_attr *pwr) |
| { |
| unipro_writel(ufs, 0x22, UNIPRO_DBG_FORCE_DME_CTRL_STATE); |
| |
| return 0; |
| } |
| |
| static int exynos7_ufs_post_pwr_change(struct exynos_ufs *ufs, |
| struct ufs_pa_layer_attr *pwr) |
| { |
| struct ufs_hba *hba = ufs->hba; |
| int lanes = max_t(u32, pwr->lane_rx, pwr->lane_tx); |
| |
| ufshcd_dme_set(hba, UIC_ARG_MIB(PA_DBG_RXPHY_CFGUPDT), 0x1); |
| |
| if (lanes == 1) { |
| exynos_ufs_enable_dbg_mode(hba); |
| ufshcd_dme_set(hba, UIC_ARG_MIB(PA_CONNECTEDTXDATALANES), 0x1); |
| exynos_ufs_disable_dbg_mode(hba); |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * exynos_ufs_auto_ctrl_hcc - HCI core clock control by h/w |
| * Control should be disabled in the below cases |
| * - Before host controller S/W reset |
| * - Access to UFS protector's register |
| */ |
| static void exynos_ufs_auto_ctrl_hcc(struct exynos_ufs *ufs, bool en) |
| { |
| u32 misc = hci_readl(ufs, HCI_MISC); |
| |
| if (en) |
| hci_writel(ufs, misc | HCI_CORECLK_CTRL_EN, HCI_MISC); |
| else |
| hci_writel(ufs, misc & ~HCI_CORECLK_CTRL_EN, HCI_MISC); |
| } |
| |
| static void exynos_ufs_ctrl_clkstop(struct exynos_ufs *ufs, bool en) |
| { |
| u32 ctrl = hci_readl(ufs, HCI_CLKSTOP_CTRL); |
| u32 misc = hci_readl(ufs, HCI_MISC); |
| |
| if (en) { |
| hci_writel(ufs, misc | CLK_CTRL_EN_MASK, HCI_MISC); |
| hci_writel(ufs, ctrl | CLK_STOP_MASK, HCI_CLKSTOP_CTRL); |
| } else { |
| hci_writel(ufs, ctrl & ~CLK_STOP_MASK, HCI_CLKSTOP_CTRL); |
| hci_writel(ufs, misc & ~CLK_CTRL_EN_MASK, HCI_MISC); |
| } |
| } |
| |
| static int exynos_ufs_get_clk_info(struct exynos_ufs *ufs) |
| { |
| struct ufs_hba *hba = ufs->hba; |
| struct list_head *head = &hba->clk_list_head; |
| struct ufs_clk_info *clki; |
| u32 pclk_rate; |
| u32 f_min, f_max; |
| u8 div = 0; |
| int ret = 0; |
| |
| if (list_empty(head)) |
| goto out; |
| |
| list_for_each_entry(clki, head, list) { |
| if (!IS_ERR(clki->clk)) { |
| if (!strcmp(clki->name, "core_clk")) |
| ufs->clk_hci_core = clki->clk; |
| else if (!strcmp(clki->name, "sclk_unipro_main")) |
| ufs->clk_unipro_main = clki->clk; |
| } |
| } |
| |
| if (!ufs->clk_hci_core || !ufs->clk_unipro_main) { |
| dev_err(hba->dev, "failed to get clk info\n"); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| ufs->mclk_rate = clk_get_rate(ufs->clk_unipro_main); |
| pclk_rate = clk_get_rate(ufs->clk_hci_core); |
| f_min = ufs->pclk_avail_min; |
| f_max = ufs->pclk_avail_max; |
| |
| if (ufs->opts & EXYNOS_UFS_OPT_HAS_APB_CLK_CTRL) { |
| do { |
| pclk_rate /= (div + 1); |
| |
| if (pclk_rate <= f_max) |
| break; |
| div++; |
| } while (pclk_rate >= f_min); |
| } |
| |
| if (unlikely(pclk_rate < f_min || pclk_rate > f_max)) { |
| dev_err(hba->dev, "not available pclk range %d\n", pclk_rate); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| ufs->pclk_rate = pclk_rate; |
| ufs->pclk_div = div; |
| |
| out: |
| return ret; |
| } |
| |
| static void exynos_ufs_set_unipro_pclk_div(struct exynos_ufs *ufs) |
| { |
| if (ufs->opts & EXYNOS_UFS_OPT_HAS_APB_CLK_CTRL) { |
| u32 val; |
| |
| val = hci_readl(ufs, HCI_UNIPRO_APB_CLK_CTRL); |
| hci_writel(ufs, UNIPRO_APB_CLK(val, ufs->pclk_div), |
| HCI_UNIPRO_APB_CLK_CTRL); |
| } |
| } |
| |
| static void exynos_ufs_set_pwm_clk_div(struct exynos_ufs *ufs) |
| { |
| struct ufs_hba *hba = ufs->hba; |
| struct exynos_ufs_uic_attr *attr = ufs->drv_data->uic_attr; |
| |
| ufshcd_dme_set(hba, |
| UIC_ARG_MIB(CMN_PWM_CLK_CTRL), attr->cmn_pwm_clk_ctrl); |
| } |
| |
| static void exynos_ufs_calc_pwm_clk_div(struct exynos_ufs *ufs) |
| { |
| struct ufs_hba *hba = ufs->hba; |
| struct exynos_ufs_uic_attr *attr = ufs->drv_data->uic_attr; |
| const unsigned int div = 30, mult = 20; |
| const unsigned long pwm_min = 3 * 1000 * 1000; |
| const unsigned long pwm_max = 9 * 1000 * 1000; |
| const int divs[] = {32, 16, 8, 4}; |
| unsigned long clk = 0, _clk, clk_period; |
| int i = 0, clk_idx = -1; |
| |
| clk_period = UNIPRO_PCLK_PERIOD(ufs); |
| for (i = 0; i < ARRAY_SIZE(divs); i++) { |
| _clk = NSEC_PER_SEC * mult / (clk_period * divs[i] * div); |
| if (_clk >= pwm_min && _clk <= pwm_max) { |
| if (_clk > clk) { |
| clk_idx = i; |
| clk = _clk; |
| } |
| } |
| } |
| |
| if (clk_idx == -1) { |
| ufshcd_dme_get(hba, UIC_ARG_MIB(CMN_PWM_CLK_CTRL), &clk_idx); |
| dev_err(hba->dev, |
| "failed to decide pwm clock divider, will not change\n"); |
| } |
| |
| attr->cmn_pwm_clk_ctrl = clk_idx & PWM_CLK_CTRL_MASK; |
| } |
| |
| long exynos_ufs_calc_time_cntr(struct exynos_ufs *ufs, long period) |
| { |
| const int precise = 10; |
| long pclk_rate = ufs->pclk_rate; |
| long clk_period, fraction; |
| |
| clk_period = UNIPRO_PCLK_PERIOD(ufs); |
| fraction = ((NSEC_PER_SEC % pclk_rate) * precise) / pclk_rate; |
| |
| return (period * precise) / ((clk_period * precise) + fraction); |
| } |
| |
| static void exynos_ufs_specify_phy_time_attr(struct exynos_ufs *ufs) |
| { |
| struct exynos_ufs_uic_attr *attr = ufs->drv_data->uic_attr; |
| struct ufs_phy_time_cfg *t_cfg = &ufs->t_cfg; |
| |
| t_cfg->tx_linereset_p = |
| exynos_ufs_calc_time_cntr(ufs, attr->tx_dif_p_nsec); |
| t_cfg->tx_linereset_n = |
| exynos_ufs_calc_time_cntr(ufs, attr->tx_dif_n_nsec); |
| t_cfg->tx_high_z_cnt = |
| exynos_ufs_calc_time_cntr(ufs, attr->tx_high_z_cnt_nsec); |
| t_cfg->tx_base_n_val = |
| exynos_ufs_calc_time_cntr(ufs, attr->tx_base_unit_nsec); |
| t_cfg->tx_gran_n_val = |
| exynos_ufs_calc_time_cntr(ufs, attr->tx_gran_unit_nsec); |
| t_cfg->tx_sleep_cnt = |
| exynos_ufs_calc_time_cntr(ufs, attr->tx_sleep_cnt); |
| |
| t_cfg->rx_linereset = |
| exynos_ufs_calc_time_cntr(ufs, attr->rx_dif_p_nsec); |
| t_cfg->rx_hibern8_wait = |
| exynos_ufs_calc_time_cntr(ufs, attr->rx_hibern8_wait_nsec); |
| t_cfg->rx_base_n_val = |
| exynos_ufs_calc_time_cntr(ufs, attr->rx_base_unit_nsec); |
| t_cfg->rx_gran_n_val = |
| exynos_ufs_calc_time_cntr(ufs, attr->rx_gran_unit_nsec); |
| t_cfg->rx_sleep_cnt = |
| exynos_ufs_calc_time_cntr(ufs, attr->rx_sleep_cnt); |
| t_cfg->rx_stall_cnt = |
| exynos_ufs_calc_time_cntr(ufs, attr->rx_stall_cnt); |
| } |
| |
| static void exynos_ufs_config_phy_time_attr(struct exynos_ufs *ufs) |
| { |
| struct ufs_hba *hba = ufs->hba; |
| struct ufs_phy_time_cfg *t_cfg = &ufs->t_cfg; |
| int i; |
| |
| exynos_ufs_set_pwm_clk_div(ufs); |
| |
| exynos_ufs_enable_ov_tm(hba); |
| |
| for_each_ufs_rx_lane(ufs, i) { |
| ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(RX_FILLER_ENABLE, i), |
| ufs->drv_data->uic_attr->rx_filler_enable); |
| ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(RX_LINERESET_VAL, i), |
| RX_LINERESET(t_cfg->rx_linereset)); |
| ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(RX_BASE_NVAL_07_00, i), |
| RX_BASE_NVAL_L(t_cfg->rx_base_n_val)); |
| ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(RX_BASE_NVAL_15_08, i), |
| RX_BASE_NVAL_H(t_cfg->rx_base_n_val)); |
| ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(RX_GRAN_NVAL_07_00, i), |
| RX_GRAN_NVAL_L(t_cfg->rx_gran_n_val)); |
| ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(RX_GRAN_NVAL_10_08, i), |
| RX_GRAN_NVAL_H(t_cfg->rx_gran_n_val)); |
| ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(RX_OV_SLEEP_CNT_TIMER, i), |
| RX_OV_SLEEP_CNT(t_cfg->rx_sleep_cnt)); |
| ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(RX_OV_STALL_CNT_TIMER, i), |
| RX_OV_STALL_CNT(t_cfg->rx_stall_cnt)); |
| } |
| |
| for_each_ufs_tx_lane(ufs, i) { |
| ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(TX_LINERESET_P_VAL, i), |
| TX_LINERESET_P(t_cfg->tx_linereset_p)); |
| ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(TX_HIGH_Z_CNT_07_00, i), |
| TX_HIGH_Z_CNT_L(t_cfg->tx_high_z_cnt)); |
| ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(TX_HIGH_Z_CNT_11_08, i), |
| TX_HIGH_Z_CNT_H(t_cfg->tx_high_z_cnt)); |
| ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(TX_BASE_NVAL_07_00, i), |
| TX_BASE_NVAL_L(t_cfg->tx_base_n_val)); |
| ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(TX_BASE_NVAL_15_08, i), |
| TX_BASE_NVAL_H(t_cfg->tx_base_n_val)); |
| ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(TX_GRAN_NVAL_07_00, i), |
| TX_GRAN_NVAL_L(t_cfg->tx_gran_n_val)); |
| ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(TX_GRAN_NVAL_10_08, i), |
| TX_GRAN_NVAL_H(t_cfg->tx_gran_n_val)); |
| ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(TX_OV_SLEEP_CNT_TIMER, i), |
| TX_OV_H8_ENTER_EN | |
| TX_OV_SLEEP_CNT(t_cfg->tx_sleep_cnt)); |
| ufshcd_dme_set(hba, UIC_ARG_MIB_SEL(TX_MIN_ACTIVATETIME, i), |
| ufs->drv_data->uic_attr->tx_min_activatetime); |
| } |
| |
| exynos_ufs_disable_ov_tm(hba); |
| } |
| |
| static void exynos_ufs_config_phy_cap_attr(struct exynos_ufs *ufs) |
| { |
| struct ufs_hba *hba = ufs->hba; |
| struct exynos_ufs_uic_attr *attr = ufs->drv_data->uic_attr; |
| int i; |
| |
| exynos_ufs_enable_ov_tm(hba); |
| |
| for_each_ufs_rx_lane(ufs, i) { |
| ufshcd_dme_set(hba, |
| UIC_ARG_MIB_SEL(RX_HS_G1_SYNC_LENGTH_CAP, i), |
| attr->rx_hs_g1_sync_len_cap); |
| ufshcd_dme_set(hba, |
| UIC_ARG_MIB_SEL(RX_HS_G2_SYNC_LENGTH_CAP, i), |
| attr->rx_hs_g2_sync_len_cap); |
| ufshcd_dme_set(hba, |
| UIC_ARG_MIB_SEL(RX_HS_G3_SYNC_LENGTH_CAP, i), |
| attr->rx_hs_g3_sync_len_cap); |
| ufshcd_dme_set(hba, |
| UIC_ARG_MIB_SEL(RX_HS_G1_PREP_LENGTH_CAP, i), |
| attr->rx_hs_g1_prep_sync_len_cap); |
| ufshcd_dme_set(hba, |
| UIC_ARG_MIB_SEL(RX_HS_G2_PREP_LENGTH_CAP, i), |
| attr->rx_hs_g2_prep_sync_len_cap); |
| ufshcd_dme_set(hba, |
| UIC_ARG_MIB_SEL(RX_HS_G3_PREP_LENGTH_CAP, i), |
| attr->rx_hs_g3_prep_sync_len_cap); |
| } |
| |
| if (attr->rx_adv_fine_gran_sup_en == 0) { |
| for_each_ufs_rx_lane(ufs, i) { |
| ufshcd_dme_set(hba, |
| UIC_ARG_MIB_SEL(RX_ADV_GRANULARITY_CAP, i), 0); |
| |
| if (attr->rx_min_actv_time_cap) |
| ufshcd_dme_set(hba, |
| UIC_ARG_MIB_SEL(RX_MIN_ACTIVATETIME_CAP, |
| i), attr->rx_min_actv_time_cap); |
| |
| if (attr->rx_hibern8_time_cap) |
| ufshcd_dme_set(hba, |
| UIC_ARG_MIB_SEL(RX_HIBERN8TIME_CAP, i), |
| attr->rx_hibern8_time_cap); |
| } |
| } else if (attr->rx_adv_fine_gran_sup_en == 1) { |
| for_each_ufs_rx_lane(ufs, i) { |
| if (attr->rx_adv_fine_gran_step) |
| ufshcd_dme_set(hba, |
| UIC_ARG_MIB_SEL(RX_ADV_GRANULARITY_CAP, |
| i), RX_ADV_FINE_GRAN_STEP( |
| attr->rx_adv_fine_gran_step)); |
| |
| if (attr->rx_adv_min_actv_time_cap) |
| ufshcd_dme_set(hba, |
| UIC_ARG_MIB_SEL( |
| RX_ADV_MIN_ACTIVATETIME_CAP, i), |
| attr->rx_adv_min_actv_time_cap); |
| |
| if (attr->rx_adv_hibern8_time_cap) |
| ufshcd_dme_set(hba, |
| UIC_ARG_MIB_SEL(RX_ADV_HIBERN8TIME_CAP, |
| i), |
| attr->rx_adv_hibern8_time_cap); |
| } |
| } |
| |
| exynos_ufs_disable_ov_tm(hba); |
| } |
| |
| static void exynos_ufs_establish_connt(struct exynos_ufs *ufs) |
| { |
| struct ufs_hba *hba = ufs->hba; |
| enum { |
| DEV_ID = 0x00, |
| PEER_DEV_ID = 0x01, |
| PEER_CPORT_ID = 0x00, |
| TRAFFIC_CLASS = 0x00, |
| }; |
| |
| /* allow cport attributes to be set */ |
| ufshcd_dme_set(hba, UIC_ARG_MIB(T_CONNECTIONSTATE), CPORT_IDLE); |
| |
| /* local unipro attributes */ |
| ufshcd_dme_set(hba, UIC_ARG_MIB(N_DEVICEID), DEV_ID); |
| ufshcd_dme_set(hba, UIC_ARG_MIB(N_DEVICEID_VALID), TRUE); |
| ufshcd_dme_set(hba, UIC_ARG_MIB(T_PEERDEVICEID), PEER_DEV_ID); |
| ufshcd_dme_set(hba, UIC_ARG_MIB(T_PEERCPORTID), PEER_CPORT_ID); |
| ufshcd_dme_set(hba, UIC_ARG_MIB(T_CPORTFLAGS), CPORT_DEF_FLAGS); |
| ufshcd_dme_set(hba, UIC_ARG_MIB(T_TRAFFICCLASS), TRAFFIC_CLASS); |
| ufshcd_dme_set(hba, UIC_ARG_MIB(T_CONNECTIONSTATE), CPORT_CONNECTED); |
| } |
| |
| static void exynos_ufs_config_smu(struct exynos_ufs *ufs) |
| { |
| u32 reg, val; |
| |
| exynos_ufs_disable_auto_ctrl_hcc_save(ufs, &val); |
| |
| /* make encryption disabled by default */ |
| reg = ufsp_readl(ufs, UFSPRSECURITY); |
| ufsp_writel(ufs, reg | NSSMU, UFSPRSECURITY); |
| ufsp_writel(ufs, 0x0, UFSPSBEGIN0); |
| ufsp_writel(ufs, 0xffffffff, UFSPSEND0); |
| ufsp_writel(ufs, 0xff, UFSPSLUN0); |
| ufsp_writel(ufs, 0xf1, UFSPSCTRL0); |
| |
| exynos_ufs_auto_ctrl_hcc_restore(ufs, &val); |
| } |
| |
| static void exynos_ufs_config_sync_pattern_mask(struct exynos_ufs *ufs, |
| struct ufs_pa_layer_attr *pwr) |
| { |
| struct ufs_hba *hba = ufs->hba; |
| u8 g = max_t(u32, pwr->gear_rx, pwr->gear_tx); |
| u32 mask, sync_len; |
| enum { |
| SYNC_LEN_G1 = 80 * 1000, /* 80us */ |
| SYNC_LEN_G2 = 40 * 1000, /* 44us */ |
| SYNC_LEN_G3 = 20 * 1000, /* 20us */ |
| }; |
| int i; |
| |
| if (g == 1) |
| sync_len = SYNC_LEN_G1; |
| else if (g == 2) |
| sync_len = SYNC_LEN_G2; |
| else if (g == 3) |
| sync_len = SYNC_LEN_G3; |
| else |
| return; |
| |
| mask = exynos_ufs_calc_time_cntr(ufs, sync_len); |
| mask = (mask >> 8) & 0xff; |
| |
| exynos_ufs_enable_ov_tm(hba); |
| |
| for_each_ufs_rx_lane(ufs, i) |
| ufshcd_dme_set(hba, |
| UIC_ARG_MIB_SEL(RX_SYNC_MASK_LENGTH, i), mask); |
| |
| exynos_ufs_disable_ov_tm(hba); |
| } |
| |
| static int exynos_ufs_pre_pwr_mode(struct ufs_hba *hba, |
| struct ufs_pa_layer_attr *dev_max_params, |
| struct ufs_pa_layer_attr *dev_req_params) |
| { |
| struct exynos_ufs *ufs = ufshcd_get_variant(hba); |
| struct phy *generic_phy = ufs->phy; |
| struct ufs_dev_params ufs_exynos_cap; |
| int ret; |
| |
| if (!dev_req_params) { |
| pr_err("%s: incoming dev_req_params is NULL\n", __func__); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| |
| ufs_exynos_cap.tx_lanes = UFS_EXYNOS_LIMIT_NUM_LANES_TX; |
| ufs_exynos_cap.rx_lanes = UFS_EXYNOS_LIMIT_NUM_LANES_RX; |
| ufs_exynos_cap.hs_rx_gear = UFS_EXYNOS_LIMIT_HSGEAR_RX; |
| ufs_exynos_cap.hs_tx_gear = UFS_EXYNOS_LIMIT_HSGEAR_TX; |
| ufs_exynos_cap.pwm_rx_gear = UFS_EXYNOS_LIMIT_PWMGEAR_RX; |
| ufs_exynos_cap.pwm_tx_gear = UFS_EXYNOS_LIMIT_PWMGEAR_TX; |
| ufs_exynos_cap.rx_pwr_pwm = UFS_EXYNOS_LIMIT_RX_PWR_PWM; |
| ufs_exynos_cap.tx_pwr_pwm = UFS_EXYNOS_LIMIT_TX_PWR_PWM; |
| ufs_exynos_cap.rx_pwr_hs = UFS_EXYNOS_LIMIT_RX_PWR_HS; |
| ufs_exynos_cap.tx_pwr_hs = UFS_EXYNOS_LIMIT_TX_PWR_HS; |
| ufs_exynos_cap.hs_rate = UFS_EXYNOS_LIMIT_HS_RATE; |
| ufs_exynos_cap.desired_working_mode = |
| UFS_EXYNOS_LIMIT_DESIRED_MODE; |
| |
| ret = ufshcd_get_pwr_dev_param(&ufs_exynos_cap, |
| dev_max_params, dev_req_params); |
| if (ret) { |
| pr_err("%s: failed to determine capabilities\n", __func__); |
| goto out; |
| } |
| |
| if (ufs->drv_data->pre_pwr_change) |
| ufs->drv_data->pre_pwr_change(ufs, dev_req_params); |
| |
| if (ufshcd_is_hs_mode(dev_req_params)) { |
| exynos_ufs_config_sync_pattern_mask(ufs, dev_req_params); |
| |
| switch (dev_req_params->hs_rate) { |
| case PA_HS_MODE_A: |
| case PA_HS_MODE_B: |
| phy_calibrate(generic_phy); |
| break; |
| } |
| } |
| |
| /* setting for three timeout values for traffic class #0 */ |
| ufshcd_dme_set(hba, UIC_ARG_MIB(PA_PWRMODEUSERDATA0), 8064); |
| ufshcd_dme_set(hba, UIC_ARG_MIB(PA_PWRMODEUSERDATA1), 28224); |
| ufshcd_dme_set(hba, UIC_ARG_MIB(PA_PWRMODEUSERDATA2), 20160); |
| |
| return 0; |
| out: |
| return ret; |
| } |
| |
| #define PWR_MODE_STR_LEN 64 |
| static int exynos_ufs_post_pwr_mode(struct ufs_hba *hba, |
| struct ufs_pa_layer_attr *pwr_max, |
| struct ufs_pa_layer_attr *pwr_req) |
| { |
| struct exynos_ufs *ufs = ufshcd_get_variant(hba); |
| struct phy *generic_phy = ufs->phy; |
| int gear = max_t(u32, pwr_req->gear_rx, pwr_req->gear_tx); |
| int lanes = max_t(u32, pwr_req->lane_rx, pwr_req->lane_tx); |
| char pwr_str[PWR_MODE_STR_LEN] = ""; |
| |
| /* let default be PWM Gear 1, Lane 1 */ |
| if (!gear) |
| gear = 1; |
| |
| if (!lanes) |
| lanes = 1; |
| |
| if (ufs->drv_data->post_pwr_change) |
| ufs->drv_data->post_pwr_change(ufs, pwr_req); |
| |
| if ((ufshcd_is_hs_mode(pwr_req))) { |
| switch (pwr_req->hs_rate) { |
| case PA_HS_MODE_A: |
| case PA_HS_MODE_B: |
| phy_calibrate(generic_phy); |
| break; |
| } |
| |
| snprintf(pwr_str, PWR_MODE_STR_LEN, "%s series_%s G_%d L_%d", |
| "FAST", pwr_req->hs_rate == PA_HS_MODE_A ? "A" : "B", |
| gear, lanes); |
| } else { |
| snprintf(pwr_str, PWR_MODE_STR_LEN, "%s G_%d L_%d", |
| "SLOW", gear, lanes); |
| } |
| |
| dev_info(hba->dev, "Power mode changed to : %s\n", pwr_str); |
| |
| return 0; |
| } |
| |
| static void exynos_ufs_specify_nexus_t_xfer_req(struct ufs_hba *hba, |
| int tag, bool op) |
| { |
| struct exynos_ufs *ufs = ufshcd_get_variant(hba); |
| u32 type; |
| |
| type = hci_readl(ufs, HCI_UTRL_NEXUS_TYPE); |
| |
| if (op) |
| hci_writel(ufs, type | (1 << tag), HCI_UTRL_NEXUS_TYPE); |
| else |
| hci_writel(ufs, type & ~(1 << tag), HCI_UTRL_NEXUS_TYPE); |
| } |
| |
| static void exynos_ufs_specify_nexus_t_tm_req(struct ufs_hba *hba, |
| int tag, u8 func) |
| { |
| struct exynos_ufs *ufs = ufshcd_get_variant(hba); |
| u32 type; |
| |
| type = hci_readl(ufs, HCI_UTMRL_NEXUS_TYPE); |
| |
| switch (func) { |
| case UFS_ABORT_TASK: |
| case UFS_QUERY_TASK: |
| hci_writel(ufs, type | (1 << tag), HCI_UTMRL_NEXUS_TYPE); |
| break; |
| case UFS_ABORT_TASK_SET: |
| case UFS_CLEAR_TASK_SET: |
| case UFS_LOGICAL_RESET: |
| case UFS_QUERY_TASK_SET: |
| hci_writel(ufs, type & ~(1 << tag), HCI_UTMRL_NEXUS_TYPE); |
| break; |
| } |
| } |
| |
| static int exynos_ufs_phy_init(struct exynos_ufs *ufs) |
| { |
| struct ufs_hba *hba = ufs->hba; |
| struct phy *generic_phy = ufs->phy; |
| int ret = 0; |
| |
| if (ufs->avail_ln_rx == 0 || ufs->avail_ln_tx == 0) { |
| ufshcd_dme_get(hba, UIC_ARG_MIB(PA_AVAILRXDATALANES), |
| &ufs->avail_ln_rx); |
| ufshcd_dme_get(hba, UIC_ARG_MIB(PA_AVAILTXDATALANES), |
| &ufs->avail_ln_tx); |
| WARN(ufs->avail_ln_rx != ufs->avail_ln_tx, |
| "available data lane is not equal(rx:%d, tx:%d)\n", |
| ufs->avail_ln_rx, ufs->avail_ln_tx); |
| } |
| |
| phy_set_bus_width(generic_phy, ufs->avail_ln_rx); |
| ret = phy_init(generic_phy); |
| if (ret) { |
| dev_err(hba->dev, "%s: phy init failed, ret = %d\n", |
| __func__, ret); |
| goto out_exit_phy; |
| } |
| |
| return 0; |
| |
| out_exit_phy: |
| phy_exit(generic_phy); |
| |
| return ret; |
| } |
| |
| static void exynos_ufs_config_unipro(struct exynos_ufs *ufs) |
| { |
| struct ufs_hba *hba = ufs->hba; |
| |
| ufshcd_dme_set(hba, UIC_ARG_MIB(PA_DBG_CLK_PERIOD), |
| DIV_ROUND_UP(NSEC_PER_SEC, ufs->mclk_rate)); |
| ufshcd_dme_set(hba, UIC_ARG_MIB(PA_TXTRAILINGCLOCKS), |
| ufs->drv_data->uic_attr->tx_trailingclks); |
| ufshcd_dme_set(hba, UIC_ARG_MIB(PA_DBG_OPTION_SUITE), |
| ufs->drv_data->uic_attr->pa_dbg_option_suite); |
| } |
| |
| static void exynos_ufs_config_intr(struct exynos_ufs *ufs, u32 errs, u8 index) |
| { |
| switch (index) { |
| case UNIPRO_L1_5: |
| hci_writel(ufs, DFES_ERR_EN | errs, HCI_ERR_EN_PA_LAYER); |
| break; |
| case UNIPRO_L2: |
| hci_writel(ufs, DFES_ERR_EN | errs, HCI_ERR_EN_DL_LAYER); |
| break; |
| case UNIPRO_L3: |
| hci_writel(ufs, DFES_ERR_EN | errs, HCI_ERR_EN_N_LAYER); |
| break; |
| case UNIPRO_L4: |
| hci_writel(ufs, DFES_ERR_EN | errs, HCI_ERR_EN_T_LAYER); |
| break; |
| case UNIPRO_DME: |
| hci_writel(ufs, DFES_ERR_EN | errs, HCI_ERR_EN_DME_LAYER); |
| break; |
| } |
| } |
| |
| static int exynos_ufs_pre_link(struct ufs_hba *hba) |
| { |
| struct exynos_ufs *ufs = ufshcd_get_variant(hba); |
| |
| /* hci */ |
| exynos_ufs_config_intr(ufs, DFES_DEF_L2_ERRS, UNIPRO_L2); |
| exynos_ufs_config_intr(ufs, DFES_DEF_L3_ERRS, UNIPRO_L3); |
| exynos_ufs_config_intr(ufs, DFES_DEF_L4_ERRS, UNIPRO_L4); |
| exynos_ufs_set_unipro_pclk_div(ufs); |
| |
| /* unipro */ |
| exynos_ufs_config_unipro(ufs); |
| |
| /* m-phy */ |
| exynos_ufs_phy_init(ufs); |
| exynos_ufs_config_phy_time_attr(ufs); |
| exynos_ufs_config_phy_cap_attr(ufs); |
| |
| if (ufs->drv_data->pre_link) |
| ufs->drv_data->pre_link(ufs); |
| |
| return 0; |
| } |
| |
| static void exynos_ufs_fit_aggr_timeout(struct exynos_ufs *ufs) |
| { |
| u32 val; |
| |
| val = exynos_ufs_calc_time_cntr(ufs, IATOVAL_NSEC / CNTR_DIV_VAL); |
| hci_writel(ufs, val & CNT_VAL_1US_MASK, HCI_1US_TO_CNT_VAL); |
| } |
| |
| static int exynos_ufs_post_link(struct ufs_hba *hba) |
| { |
| struct exynos_ufs *ufs = ufshcd_get_variant(hba); |
| struct phy *generic_phy = ufs->phy; |
| struct exynos_ufs_uic_attr *attr = ufs->drv_data->uic_attr; |
| |
| exynos_ufs_establish_connt(ufs); |
| exynos_ufs_fit_aggr_timeout(ufs); |
| |
| hci_writel(ufs, 0xa, HCI_DATA_REORDER); |
| hci_writel(ufs, PRDT_SET_SIZE(12), HCI_TXPRDT_ENTRY_SIZE); |
| hci_writel(ufs, PRDT_SET_SIZE(12), HCI_RXPRDT_ENTRY_SIZE); |
| hci_writel(ufs, (1 << hba->nutrs) - 1, HCI_UTRL_NEXUS_TYPE); |
| hci_writel(ufs, (1 << hba->nutmrs) - 1, HCI_UTMRL_NEXUS_TYPE); |
| hci_writel(ufs, 0xf, HCI_AXIDMA_RWDATA_BURST_LEN); |
| |
| if (ufs->opts & EXYNOS_UFS_OPT_SKIP_CONNECTION_ESTAB) |
| ufshcd_dme_set(hba, |
| UIC_ARG_MIB(T_DBG_SKIP_INIT_HIBERN8_EXIT), TRUE); |
| |
| if (attr->pa_granularity) { |
| exynos_ufs_enable_dbg_mode(hba); |
| ufshcd_dme_set(hba, UIC_ARG_MIB(PA_GRANULARITY), |
| attr->pa_granularity); |
| exynos_ufs_disable_dbg_mode(hba); |
| |
| if (attr->pa_tactivate) |
| ufshcd_dme_set(hba, UIC_ARG_MIB(PA_TACTIVATE), |
| attr->pa_tactivate); |
| if (attr->pa_hibern8time && |
| !(ufs->opts & EXYNOS_UFS_OPT_USE_SW_HIBERN8_TIMER)) |
| ufshcd_dme_set(hba, UIC_ARG_MIB(PA_HIBERN8TIME), |
| attr->pa_hibern8time); |
| } |
| |
| if (ufs->opts & EXYNOS_UFS_OPT_USE_SW_HIBERN8_TIMER) { |
| if (!attr->pa_granularity) |
| ufshcd_dme_get(hba, UIC_ARG_MIB(PA_GRANULARITY), |
| &attr->pa_granularity); |
| if (!attr->pa_hibern8time) |
| ufshcd_dme_get(hba, UIC_ARG_MIB(PA_HIBERN8TIME), |
| &attr->pa_hibern8time); |
| /* |
| * not wait for HIBERN8 time to exit hibernation |
| */ |
| ufshcd_dme_set(hba, UIC_ARG_MIB(PA_HIBERN8TIME), 0); |
| |
| if (attr->pa_granularity < 1 || attr->pa_granularity > 6) { |
| /* Valid range for granularity: 1 ~ 6 */ |
| dev_warn(hba->dev, |
| "%s: pa_granularity %d is invalid, assuming backwards compatibility\n", |
| __func__, |
| attr->pa_granularity); |
| attr->pa_granularity = 6; |
| } |
| } |
| |
| phy_calibrate(generic_phy); |
| |
| if (ufs->drv_data->post_link) |
| ufs->drv_data->post_link(ufs); |
| |
| return 0; |
| } |
| |
| static int exynos_ufs_parse_dt(struct device *dev, struct exynos_ufs *ufs) |
| { |
| struct device_node *np = dev->of_node; |
| struct exynos_ufs_drv_data *drv_data = &exynos_ufs_drvs; |
| struct exynos_ufs_uic_attr *attr; |
| int ret = 0; |
| |
| while (drv_data->compatible) { |
| if (of_device_is_compatible(np, drv_data->compatible)) { |
| ufs->drv_data = drv_data; |
| break; |
| } |
| drv_data++; |
| } |
| |
| if (ufs->drv_data && ufs->drv_data->uic_attr) { |
| attr = ufs->drv_data->uic_attr; |
| } else { |
| dev_err(dev, "failed to get uic attributes\n"); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| ufs->pclk_avail_min = PCLK_AVAIL_MIN; |
| ufs->pclk_avail_max = PCLK_AVAIL_MAX; |
| |
| attr->rx_adv_fine_gran_sup_en = RX_ADV_FINE_GRAN_SUP_EN; |
| attr->rx_adv_fine_gran_step = RX_ADV_FINE_GRAN_STEP_VAL; |
| attr->rx_adv_min_actv_time_cap = RX_ADV_MIN_ACTV_TIME_CAP; |
| attr->pa_granularity = PA_GRANULARITY_VAL; |
| attr->pa_tactivate = PA_TACTIVATE_VAL; |
| attr->pa_hibern8time = PA_HIBERN8TIME_VAL; |
| |
| out: |
| return ret; |
| } |
| |
| static int exynos_ufs_init(struct ufs_hba *hba) |
| { |
| struct device *dev = hba->dev; |
| struct platform_device *pdev = to_platform_device(dev); |
| struct exynos_ufs *ufs; |
| int ret; |
| |
| ufs = devm_kzalloc(dev, sizeof(*ufs), GFP_KERNEL); |
| if (!ufs) |
| return -ENOMEM; |
| |
| /* exynos-specific hci */ |
| ufs->reg_hci = devm_platform_ioremap_resource_byname(pdev, "vs_hci"); |
| if (IS_ERR(ufs->reg_hci)) { |
| dev_err(dev, "cannot ioremap for hci vendor register\n"); |
| return PTR_ERR(ufs->reg_hci); |
| } |
| |
| /* unipro */ |
| ufs->reg_unipro = devm_platform_ioremap_resource_byname(pdev, "unipro"); |
| if (IS_ERR(ufs->reg_unipro)) { |
| dev_err(dev, "cannot ioremap for unipro register\n"); |
| return PTR_ERR(ufs->reg_unipro); |
| } |
| |
| /* ufs protector */ |
| ufs->reg_ufsp = devm_platform_ioremap_resource_byname(pdev, "ufsp"); |
| if (IS_ERR(ufs->reg_ufsp)) { |
| dev_err(dev, "cannot ioremap for ufs protector register\n"); |
| return PTR_ERR(ufs->reg_ufsp); |
| } |
| |
| ret = exynos_ufs_parse_dt(dev, ufs); |
| if (ret) { |
| dev_err(dev, "failed to get dt info.\n"); |
| goto out; |
| } |
| |
| ufs->phy = devm_phy_get(dev, "ufs-phy"); |
| if (IS_ERR(ufs->phy)) { |
| ret = PTR_ERR(ufs->phy); |
| dev_err(dev, "failed to get ufs-phy\n"); |
| goto out; |
| } |
| |
| ret = phy_power_on(ufs->phy); |
| if (ret) |
| goto phy_off; |
| |
| ufs->hba = hba; |
| ufs->opts = ufs->drv_data->opts; |
| ufs->rx_sel_idx = PA_MAXDATALANES; |
| if (ufs->opts & EXYNOS_UFS_OPT_BROKEN_RX_SEL_IDX) |
| ufs->rx_sel_idx = 0; |
| hba->priv = (void *)ufs; |
| hba->quirks = ufs->drv_data->quirks; |
| if (ufs->drv_data->drv_init) { |
| ret = ufs->drv_data->drv_init(dev, ufs); |
| if (ret) { |
| dev_err(dev, "failed to init drv-data\n"); |
| goto out; |
| } |
| } |
| |
| ret = exynos_ufs_get_clk_info(ufs); |
| if (ret) |
| goto out; |
| exynos_ufs_specify_phy_time_attr(ufs); |
| exynos_ufs_config_smu(ufs); |
| return 0; |
| |
| phy_off: |
| phy_power_off(ufs->phy); |
| out: |
| hba->priv = NULL; |
| return ret; |
| } |
| |
| static int exynos_ufs_host_reset(struct ufs_hba *hba) |
| { |
| struct exynos_ufs *ufs = ufshcd_get_variant(hba); |
| unsigned long timeout = jiffies + msecs_to_jiffies(1); |
| u32 val; |
| int ret = 0; |
| |
| exynos_ufs_disable_auto_ctrl_hcc_save(ufs, &val); |
| |
| hci_writel(ufs, UFS_SW_RST_MASK, HCI_SW_RST); |
| |
| do { |
| if (!(hci_readl(ufs, HCI_SW_RST) & UFS_SW_RST_MASK)) |
| goto out; |
| } while (time_before(jiffies, timeout)); |
| |
| dev_err(hba->dev, "timeout host sw-reset\n"); |
| ret = -ETIMEDOUT; |
| |
| out: |
| exynos_ufs_auto_ctrl_hcc_restore(ufs, &val); |
| return ret; |
| } |
| |
| static void exynos_ufs_dev_hw_reset(struct ufs_hba *hba) |
| { |
| struct exynos_ufs *ufs = ufshcd_get_variant(hba); |
| |
| hci_writel(ufs, 0 << 0, HCI_GPIO_OUT); |
| udelay(5); |
| hci_writel(ufs, 1 << 0, HCI_GPIO_OUT); |
| } |
| |
| static void exynos_ufs_pre_hibern8(struct ufs_hba *hba, u8 enter) |
| { |
| struct exynos_ufs *ufs = ufshcd_get_variant(hba); |
| struct exynos_ufs_uic_attr *attr = ufs->drv_data->uic_attr; |
| |
| if (!enter) { |
| if (ufs->opts & EXYNOS_UFS_OPT_BROKEN_AUTO_CLK_CTRL) |
| exynos_ufs_disable_auto_ctrl_hcc(ufs); |
| exynos_ufs_ungate_clks(ufs); |
| |
| if (ufs->opts & EXYNOS_UFS_OPT_USE_SW_HIBERN8_TIMER) { |
| const unsigned int granularity_tbl[] = { |
| 1, 4, 8, 16, 32, 100 |
| }; |
| int h8_time = attr->pa_hibern8time * |
| granularity_tbl[attr->pa_granularity - 1]; |
| unsigned long us; |
| s64 delta; |
| |
| do { |
| delta = h8_time - ktime_us_delta(ktime_get(), |
| ufs->entry_hibern8_t); |
| if (delta <= 0) |
| break; |
| |
| us = min_t(s64, delta, USEC_PER_MSEC); |
| if (us >= 10) |
| usleep_range(us, us + 10); |
| } while (1); |
| } |
| } |
| } |
| |
| static void exynos_ufs_post_hibern8(struct ufs_hba *hba, u8 enter) |
| { |
| struct exynos_ufs *ufs = ufshcd_get_variant(hba); |
| |
| if (!enter) { |
| u32 cur_mode = 0; |
| u32 pwrmode; |
| |
| if (ufshcd_is_hs_mode(&ufs->dev_req_params)) |
| pwrmode = FAST_MODE; |
| else |
| pwrmode = SLOW_MODE; |
| |
| ufshcd_dme_get(hba, UIC_ARG_MIB(PA_PWRMODE), &cur_mode); |
| if (cur_mode != (pwrmode << 4 | pwrmode)) { |
| dev_warn(hba->dev, "%s: power mode change\n", __func__); |
| hba->pwr_info.pwr_rx = (cur_mode >> 4) & 0xf; |
| hba->pwr_info.pwr_tx = cur_mode & 0xf; |
| ufshcd_config_pwr_mode(hba, &hba->max_pwr_info.info); |
| } |
| |
| if (!(ufs->opts & EXYNOS_UFS_OPT_SKIP_CONNECTION_ESTAB)) |
| exynos_ufs_establish_connt(ufs); |
| } else { |
| ufs->entry_hibern8_t = ktime_get(); |
| exynos_ufs_gate_clks(ufs); |
| if (ufs->opts & EXYNOS_UFS_OPT_BROKEN_AUTO_CLK_CTRL) |
| exynos_ufs_enable_auto_ctrl_hcc(ufs); |
| } |
| } |
| |
| static int exynos_ufs_hce_enable_notify(struct ufs_hba *hba, |
| enum ufs_notify_change_status status) |
| { |
| struct exynos_ufs *ufs = ufshcd_get_variant(hba); |
| int ret = 0; |
| |
| switch (status) { |
| case PRE_CHANGE: |
| ret = exynos_ufs_host_reset(hba); |
| if (ret) |
| return ret; |
| exynos_ufs_dev_hw_reset(hba); |
| break; |
| case POST_CHANGE: |
| exynos_ufs_calc_pwm_clk_div(ufs); |
| if (!(ufs->opts & EXYNOS_UFS_OPT_BROKEN_AUTO_CLK_CTRL)) |
| exynos_ufs_enable_auto_ctrl_hcc(ufs); |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static int exynos_ufs_link_startup_notify(struct ufs_hba *hba, |
| enum ufs_notify_change_status status) |
| { |
| int ret = 0; |
| |
| switch (status) { |
| case PRE_CHANGE: |
| ret = exynos_ufs_pre_link(hba); |
| break; |
| case POST_CHANGE: |
| ret = exynos_ufs_post_link(hba); |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static int exynos_ufs_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) |
| { |
| int ret = 0; |
| |
| switch (status) { |
| case PRE_CHANGE: |
| ret = exynos_ufs_pre_pwr_mode(hba, dev_max_params, |
| dev_req_params); |
| break; |
| case POST_CHANGE: |
| ret = exynos_ufs_post_pwr_mode(hba, NULL, dev_req_params); |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static void exynos_ufs_hibern8_notify(struct ufs_hba *hba, |
| enum uic_cmd_dme enter, |
| enum ufs_notify_change_status notify) |
| { |
| switch ((u8)notify) { |
| case PRE_CHANGE: |
| exynos_ufs_pre_hibern8(hba, enter); |
| break; |
| case POST_CHANGE: |
| exynos_ufs_post_hibern8(hba, enter); |
| break; |
| } |
| } |
| |
| static int exynos_ufs_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) |
| { |
| struct exynos_ufs *ufs = ufshcd_get_variant(hba); |
| |
| if (!ufshcd_is_link_active(hba)) |
| phy_power_off(ufs->phy); |
| |
| return 0; |
| } |
| |
| static int exynos_ufs_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op) |
| { |
| struct exynos_ufs *ufs = ufshcd_get_variant(hba); |
| |
| if (!ufshcd_is_link_active(hba)) |
| phy_power_on(ufs->phy); |
| |
| exynos_ufs_config_smu(ufs); |
| |
| return 0; |
| } |
| |
| static struct ufs_hba_variant_ops ufs_hba_exynos_ops = { |
| .name = "exynos_ufs", |
| .init = exynos_ufs_init, |
| .hce_enable_notify = exynos_ufs_hce_enable_notify, |
| .link_startup_notify = exynos_ufs_link_startup_notify, |
| .pwr_change_notify = exynos_ufs_pwr_change_notify, |
| .setup_xfer_req = exynos_ufs_specify_nexus_t_xfer_req, |
| .setup_task_mgmt = exynos_ufs_specify_nexus_t_tm_req, |
| .hibern8_notify = exynos_ufs_hibern8_notify, |
| .suspend = exynos_ufs_suspend, |
| .resume = exynos_ufs_resume, |
| }; |
| |
| static int exynos_ufs_probe(struct platform_device *pdev) |
| { |
| int err; |
| struct device *dev = &pdev->dev; |
| |
| err = ufshcd_pltfrm_init(pdev, &ufs_hba_exynos_ops); |
| if (err) |
| dev_err(dev, "ufshcd_pltfrm_init() failed %d\n", err); |
| |
| return err; |
| } |
| |
| static int exynos_ufs_remove(struct platform_device *pdev) |
| { |
| struct ufs_hba *hba = platform_get_drvdata(pdev); |
| |
| pm_runtime_get_sync(&(pdev)->dev); |
| ufshcd_remove(hba); |
| return 0; |
| } |
| |
| struct exynos_ufs_drv_data exynos_ufs_drvs = { |
| |
| .compatible = "samsung,exynos7-ufs", |
| .uic_attr = &exynos7_uic_attr, |
| .quirks = UFSHCD_QUIRK_PRDT_BYTE_GRAN | |
| UFSHCI_QUIRK_BROKEN_REQ_LIST_CLR | |
| UFSHCI_QUIRK_BROKEN_HCE | |
| UFSHCI_QUIRK_SKIP_RESET_INTR_AGGR | |
| UFSHCD_QUIRK_BROKEN_OCS_FATAL_ERROR | |
| UFSHCI_QUIRK_SKIP_MANUAL_WB_FLUSH_CTRL | |
| UFSHCD_QUIRK_SKIP_DEF_UNIPRO_TIMEOUT_SETTING | |
| UFSHCD_QUIRK_ALIGN_SG_WITH_PAGE_SIZE, |
| .opts = EXYNOS_UFS_OPT_HAS_APB_CLK_CTRL | |
| EXYNOS_UFS_OPT_BROKEN_AUTO_CLK_CTRL | |
| EXYNOS_UFS_OPT_BROKEN_RX_SEL_IDX | |
| EXYNOS_UFS_OPT_SKIP_CONNECTION_ESTAB | |
| EXYNOS_UFS_OPT_USE_SW_HIBERN8_TIMER | |
| UFSHCD_QUIRK_ALIGN_SG_WITH_PAGE_SIZE, |
| .drv_init = exynos7_ufs_drv_init, |
| .pre_link = exynos7_ufs_pre_link, |
| .post_link = exynos7_ufs_post_link, |
| .pre_pwr_change = exynos7_ufs_pre_pwr_change, |
| .post_pwr_change = exynos7_ufs_post_pwr_change, |
| }; |
| |
| static const struct of_device_id exynos_ufs_of_match[] = { |
| { .compatible = "samsung,exynos7-ufs", |
| .data = &exynos_ufs_drvs }, |
| {}, |
| }; |
| |
| static const struct dev_pm_ops exynos_ufs_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 exynos_ufs_pltform = { |
| .probe = exynos_ufs_probe, |
| .remove = exynos_ufs_remove, |
| .shutdown = ufshcd_pltfrm_shutdown, |
| .driver = { |
| .name = "exynos-ufshc", |
| .pm = &exynos_ufs_pm_ops, |
| .of_match_table = of_match_ptr(exynos_ufs_of_match), |
| }, |
| }; |
| module_platform_driver(exynos_ufs_pltform); |
| |
| MODULE_AUTHOR("Alim Akhtar <alim.akhtar@samsung.com>"); |
| MODULE_AUTHOR("Seungwon Jeon <essuuj@gmail.com>"); |
| MODULE_DESCRIPTION("Exynos UFS HCI Driver"); |
| MODULE_LICENSE("GPL v2"); |