diff options
Diffstat (limited to 'rr-cache/b99949bc1ff147a83e2e82fb563d2bcdc8be2c85/preimage')
| -rw-r--r-- | rr-cache/b99949bc1ff147a83e2e82fb563d2bcdc8be2c85/preimage | 1737 |
1 files changed, 1737 insertions, 0 deletions
diff --git a/rr-cache/b99949bc1ff147a83e2e82fb563d2bcdc8be2c85/preimage b/rr-cache/b99949bc1ff147a83e2e82fb563d2bcdc8be2c85/preimage new file mode 100644 index 0000000..2bfeff7 --- /dev/null +++ b/rr-cache/b99949bc1ff147a83e2e82fb563d2bcdc8be2c85/preimage @@ -0,0 +1,1737 @@ +/* + * drivers/mmc/host/sdhci-msm.c - Qualcomm SDHCI Platform driver + * + * Copyright (c) 2013-2014, 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. + * + */ + +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/delay.h> +#include <linux/mmc/mmc.h> +#include <linux/pm_runtime.h> +#include <linux/slab.h> +#include <linux/interconnect.h> +#include <linux/iopoll.h> +#include <linux/regulator/consumer.h> + +#include "sdhci-pltfm.h" + +#define CORE_MCI_VERSION 0x50 +#define CORE_VERSION_MAJOR_SHIFT 28 +#define CORE_VERSION_MAJOR_MASK (0xf << CORE_VERSION_MAJOR_SHIFT) +#define CORE_VERSION_MINOR_MASK 0xff + +#define CORE_MCI_GENERICS 0x70 +#define SWITCHABLE_SIGNALING_VOLTAGE BIT(29) + +#define CORE_HC_MODE 0x78 +#define HC_MODE_EN 0x1 +#define CORE_POWER 0x0 +#define CORE_SW_RST BIT(7) +#define FF_CLK_SW_RST_DIS BIT(13) + +#define CORE_PWRCTL_STATUS 0xdc +#define CORE_PWRCTL_MASK 0xe0 +#define CORE_PWRCTL_CLEAR 0xe4 +#define CORE_PWRCTL_CTL 0xe8 +#define CORE_PWRCTL_BUS_OFF BIT(0) +#define CORE_PWRCTL_BUS_ON BIT(1) +#define CORE_PWRCTL_IO_LOW BIT(2) +#define CORE_PWRCTL_IO_HIGH BIT(3) +#define CORE_PWRCTL_BUS_SUCCESS BIT(0) +#define CORE_PWRCTL_IO_SUCCESS BIT(2) +#define REQ_BUS_OFF BIT(0) +#define REQ_BUS_ON BIT(1) +#define REQ_IO_LOW BIT(2) +#define REQ_IO_HIGH BIT(3) +#define INT_MASK 0xf +#define MAX_PHASES 16 +#define CORE_DLL_LOCK BIT(7) +#define CORE_DDR_DLL_LOCK BIT(11) +#define CORE_DLL_EN BIT(16) +#define CORE_CDR_EN BIT(17) +#define CORE_CK_OUT_EN BIT(18) +#define CORE_CDR_EXT_EN BIT(19) +#define CORE_DLL_PDN BIT(29) +#define CORE_DLL_RST BIT(30) +#define CORE_DLL_CONFIG 0x100 +#define CORE_CMD_DAT_TRACK_SEL BIT(0) +#define CORE_DLL_STATUS 0x108 + +#define CORE_DLL_CONFIG_2 0x1b4 +#define CORE_DDR_CAL_EN BIT(0) +#define CORE_FLL_CYCLE_CNT BIT(18) +#define CORE_DLL_CLOCK_DISABLE BIT(21) + +#define CORE_VENDOR_SPEC 0x10c +#define CORE_VENDOR_SPEC_POR_VAL 0xa1c +#define CORE_CLK_PWRSAVE BIT(1) +#define CORE_HC_MCLK_SEL_DFLT (2 << 8) +#define CORE_HC_MCLK_SEL_HS400 (3 << 8) +#define CORE_HC_MCLK_SEL_MASK (3 << 8) +#define CORE_IO_PAD_PWR_SWITCH_EN (1 << 15) +#define CORE_IO_PAD_PWR_SWITCH (1 << 16) +#define CORE_HC_SELECT_IN_EN BIT(18) +#define CORE_HC_SELECT_IN_HS400 (6 << 19) +#define CORE_HC_SELECT_IN_MASK (7 << 19) + +#define CORE_3_0V_SUPPORT (1 << 25) +#define CORE_1_8V_SUPPORT (1 << 26) +#define CORE_VOLT_SUPPORT (CORE_3_0V_SUPPORT | CORE_1_8V_SUPPORT) + +#define CORE_CSR_CDC_CTLR_CFG0 0x130 +#define CORE_SW_TRIG_FULL_CALIB BIT(16) +#define CORE_HW_AUTOCAL_ENA BIT(17) + +#define CORE_CSR_CDC_CTLR_CFG1 0x134 +#define CORE_CSR_CDC_CAL_TIMER_CFG0 0x138 +#define CORE_TIMER_ENA BIT(16) + +#define CORE_CSR_CDC_CAL_TIMER_CFG1 0x13C +#define CORE_CSR_CDC_REFCOUNT_CFG 0x140 +#define CORE_CSR_CDC_COARSE_CAL_CFG 0x144 +#define CORE_CDC_OFFSET_CFG 0x14C +#define CORE_CSR_CDC_DELAY_CFG 0x150 +#define CORE_CDC_SLAVE_DDA_CFG 0x160 +#define CORE_CSR_CDC_STATUS0 0x164 +#define CORE_CALIBRATION_DONE BIT(0) + +#define CORE_CDC_ERROR_CODE_MASK 0x7000000 + +#define CORE_CSR_CDC_GEN_CFG 0x178 +#define CORE_CDC_SWITCH_BYPASS_OFF BIT(0) +#define CORE_CDC_SWITCH_RC_EN BIT(1) + +#define CORE_DDR_200_CFG 0x184 +#define CORE_CDC_T4_DLY_SEL BIT(0) +#define CORE_CMDIN_RCLK_EN BIT(1) +#define CORE_START_CDC_TRAFFIC BIT(6) +#define CORE_VENDOR_SPEC3 0x1b0 +#define CORE_PWRSAVE_DLL BIT(3) + +#define CORE_DDR_CONFIG 0x1b8 +#define DDR_CONFIG_POR_VAL 0x80040853 + +#define CORE_VENDOR_SPEC_CAPABILITIES0 0x11c + +#define INVALID_TUNING_PHASE -1 +#define SDHCI_MSM_MIN_CLOCK 400000 +#define CORE_FREQ_100MHZ (100 * 1000 * 1000) + +#define CDR_SELEXT_SHIFT 20 +#define CDR_SELEXT_MASK (0xf << CDR_SELEXT_SHIFT) +#define CMUX_SHIFT_PHASE_SHIFT 24 +#define CMUX_SHIFT_PHASE_MASK (7 << CMUX_SHIFT_PHASE_SHIFT) + +#define MSM_MMC_AUTOSUSPEND_DELAY_MS 50 + +/* Timeout value to avoid infinite waiting for pwr_irq */ +#define MSM_PWR_IRQ_TIMEOUT_MS 5000 + +struct sdhci_msm_host { + struct platform_device *pdev; + void __iomem *core_mem; /* MSM SDCC mapped address */ + int pwr_irq; /* power irq */ + struct clk *bus_clk; /* SDHC bus voter clock */ + struct clk *xo_clk; /* TCXO clk needed for FLL feature of cm_dll*/ + struct clk_bulk_data bulk_clks[4]; /* core, iface, cal, sleep clocks */ + unsigned long clk_rate; + struct mmc_host *mmc; + bool use_14lpp_dll_reset; + bool tuning_done; + bool calibration_done; + u8 saved_tuning_phase; + bool use_cdclp533; + u32 curr_pwr_state; + u32 curr_io_level; + wait_queue_head_t pwr_irq_wait; + bool pwr_irq_flag; +<<<<<<< + struct icc_path *path; +======= + u32 caps_0; +>>>>>>> +}; + +static unsigned int msm_get_clock_rate_for_bus_mode(struct sdhci_host *host, + unsigned int clock) +{ + struct mmc_ios ios = host->mmc->ios; + /* + * The SDHC requires internal clock frequency to be double the + * actual clock that will be set for DDR mode. The controller + * uses the faster clock(100/400MHz) for some of its parts and + * send the actual required clock (50/200MHz) to the card. + */ + if (ios.timing == MMC_TIMING_UHS_DDR50 || + ios.timing == MMC_TIMING_MMC_DDR52 || + ios.timing == MMC_TIMING_MMC_HS400 || + host->flags & SDHCI_HS400_TUNING) + clock *= 2; + return clock; +} + +static void msm_set_clock_rate_for_bus_mode(struct sdhci_host *host, + unsigned int clock) +{ + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + struct mmc_ios curr_ios = host->mmc->ios; + struct clk *core_clk = msm_host->bulk_clks[0].clk; + int rc; + + clock = msm_get_clock_rate_for_bus_mode(host, clock); + rc = clk_set_rate(core_clk, clock); + if (rc) { + pr_err("%s: Failed to set clock at rate %u at timing %d\n", + mmc_hostname(host->mmc), clock, + curr_ios.timing); + return; + } + msm_host->clk_rate = clock; + pr_debug("%s: Setting clock at rate %lu at timing %d\n", + mmc_hostname(host->mmc), clk_get_rate(core_clk), + curr_ios.timing); +} + +/* Platform specific tuning */ +static inline int msm_dll_poll_ck_out_en(struct sdhci_host *host, u8 poll) +{ + u32 wait_cnt = 50; + u8 ck_out_en; + struct mmc_host *mmc = host->mmc; + + /* Poll for CK_OUT_EN bit. max. poll time = 50us */ + ck_out_en = !!(readl_relaxed(host->ioaddr + CORE_DLL_CONFIG) & + CORE_CK_OUT_EN); + + while (ck_out_en != poll) { + if (--wait_cnt == 0) { + dev_err(mmc_dev(mmc), "%s: CK_OUT_EN bit is not %d\n", + mmc_hostname(mmc), poll); + return -ETIMEDOUT; + } + udelay(1); + + ck_out_en = !!(readl_relaxed(host->ioaddr + CORE_DLL_CONFIG) & + CORE_CK_OUT_EN); + } + + return 0; +} + +static int msm_config_cm_dll_phase(struct sdhci_host *host, u8 phase) +{ + int rc; + static const u8 grey_coded_phase_table[] = { + 0x0, 0x1, 0x3, 0x2, 0x6, 0x7, 0x5, 0x4, + 0xc, 0xd, 0xf, 0xe, 0xa, 0xb, 0x9, 0x8 + }; + unsigned long flags; + u32 config; + struct mmc_host *mmc = host->mmc; + + if (phase > 0xf) + return -EINVAL; + + spin_lock_irqsave(&host->lock, flags); + + config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG); + config &= ~(CORE_CDR_EN | CORE_CK_OUT_EN); + config |= (CORE_CDR_EXT_EN | CORE_DLL_EN); + writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG); + + /* Wait until CK_OUT_EN bit of DLL_CONFIG register becomes '0' */ + rc = msm_dll_poll_ck_out_en(host, 0); + if (rc) + goto err_out; + + /* + * Write the selected DLL clock output phase (0 ... 15) + * to CDR_SELEXT bit field of DLL_CONFIG register. + */ + config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG); + config &= ~CDR_SELEXT_MASK; + config |= grey_coded_phase_table[phase] << CDR_SELEXT_SHIFT; + writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG); + + config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG); + config |= CORE_CK_OUT_EN; + writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG); + + /* Wait until CK_OUT_EN bit of DLL_CONFIG register becomes '1' */ + rc = msm_dll_poll_ck_out_en(host, 1); + if (rc) + goto err_out; + + config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG); + config |= CORE_CDR_EN; + config &= ~CORE_CDR_EXT_EN; + writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG); + goto out; + +err_out: + dev_err(mmc_dev(mmc), "%s: Failed to set DLL phase: %d\n", + mmc_hostname(mmc), phase); +out: + spin_unlock_irqrestore(&host->lock, flags); + return rc; +} + +/* + * Find out the greatest range of consecuitive selected + * DLL clock output phases that can be used as sampling + * setting for SD3.0 UHS-I card read operation (in SDR104 + * timing mode) or for eMMC4.5 card read operation (in + * HS400/HS200 timing mode). + * Select the 3/4 of the range and configure the DLL with the + * selected DLL clock output phase. + */ + +static int msm_find_most_appropriate_phase(struct sdhci_host *host, + u8 *phase_table, u8 total_phases) +{ + int ret; + u8 ranges[MAX_PHASES][MAX_PHASES] = { {0}, {0} }; + u8 phases_per_row[MAX_PHASES] = { 0 }; + int row_index = 0, col_index = 0, selected_row_index = 0, curr_max = 0; + int i, cnt, phase_0_raw_index = 0, phase_15_raw_index = 0; + bool phase_0_found = false, phase_15_found = false; + struct mmc_host *mmc = host->mmc; + + if (!total_phases || (total_phases > MAX_PHASES)) { + dev_err(mmc_dev(mmc), "%s: Invalid argument: total_phases=%d\n", + mmc_hostname(mmc), total_phases); + return -EINVAL; + } + + for (cnt = 0; cnt < total_phases; cnt++) { + ranges[row_index][col_index] = phase_table[cnt]; + phases_per_row[row_index] += 1; + col_index++; + + if ((cnt + 1) == total_phases) { + continue; + /* check if next phase in phase_table is consecutive or not */ + } else if ((phase_table[cnt] + 1) != phase_table[cnt + 1]) { + row_index++; + col_index = 0; + } + } + + if (row_index >= MAX_PHASES) + return -EINVAL; + + /* Check if phase-0 is present in first valid window? */ + if (!ranges[0][0]) { + phase_0_found = true; + phase_0_raw_index = 0; + /* Check if cycle exist between 2 valid windows */ + for (cnt = 1; cnt <= row_index; cnt++) { + if (phases_per_row[cnt]) { + for (i = 0; i < phases_per_row[cnt]; i++) { + if (ranges[cnt][i] == 15) { + phase_15_found = true; + phase_15_raw_index = cnt; + break; + } + } + } + } + } + + /* If 2 valid windows form cycle then merge them as single window */ + if (phase_0_found && phase_15_found) { + /* number of phases in raw where phase 0 is present */ + u8 phases_0 = phases_per_row[phase_0_raw_index]; + /* number of phases in raw where phase 15 is present */ + u8 phases_15 = phases_per_row[phase_15_raw_index]; + + if (phases_0 + phases_15 >= MAX_PHASES) + /* + * If there are more than 1 phase windows then total + * number of phases in both the windows should not be + * more than or equal to MAX_PHASES. + */ + return -EINVAL; + + /* Merge 2 cyclic windows */ + i = phases_15; + for (cnt = 0; cnt < phases_0; cnt++) { + ranges[phase_15_raw_index][i] = + ranges[phase_0_raw_index][cnt]; + if (++i >= MAX_PHASES) + break; + } + + phases_per_row[phase_0_raw_index] = 0; + phases_per_row[phase_15_raw_index] = phases_15 + phases_0; + } + + for (cnt = 0; cnt <= row_index; cnt++) { + if (phases_per_row[cnt] > curr_max) { + curr_max = phases_per_row[cnt]; + selected_row_index = cnt; + } + } + + i = (curr_max * 3) / 4; + if (i) + i--; + + ret = ranges[selected_row_index][i]; + + if (ret >= MAX_PHASES) { + ret = -EINVAL; + dev_err(mmc_dev(mmc), "%s: Invalid phase selected=%d\n", + mmc_hostname(mmc), ret); + } + + return ret; +} + +static inline void msm_cm_dll_set_freq(struct sdhci_host *host) +{ + u32 mclk_freq = 0, config; + + /* Program the MCLK value to MCLK_FREQ bit field */ + if (host->clock <= 112000000) + mclk_freq = 0; + else if (host->clock <= 125000000) + mclk_freq = 1; + else if (host->clock <= 137000000) + mclk_freq = 2; + else if (host->clock <= 150000000) + mclk_freq = 3; + else if (host->clock <= 162000000) + mclk_freq = 4; + else if (host->clock <= 175000000) + mclk_freq = 5; + else if (host->clock <= 187000000) + mclk_freq = 6; + else if (host->clock <= 200000000) + mclk_freq = 7; + + config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG); + config &= ~CMUX_SHIFT_PHASE_MASK; + config |= mclk_freq << CMUX_SHIFT_PHASE_SHIFT; + writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG); +} + +/* Initialize the DLL (Programmable Delay Line) */ +static int msm_init_cm_dll(struct sdhci_host *host) +{ + struct mmc_host *mmc = host->mmc; + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + int wait_cnt = 50; + unsigned long flags; + u32 config; + + spin_lock_irqsave(&host->lock, flags); + + /* + * Make sure that clock is always enabled when DLL + * tuning is in progress. Keeping PWRSAVE ON may + * turn off the clock. + */ + config = readl_relaxed(host->ioaddr + CORE_VENDOR_SPEC); + config &= ~CORE_CLK_PWRSAVE; + writel_relaxed(config, host->ioaddr + CORE_VENDOR_SPEC); + + if (msm_host->use_14lpp_dll_reset) { + config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG); + config &= ~CORE_CK_OUT_EN; + writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG); + + config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG_2); + config |= CORE_DLL_CLOCK_DISABLE; + writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG_2); + } + + config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG); + config |= CORE_DLL_RST; + writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG); + + config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG); + config |= CORE_DLL_PDN; + writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG); + msm_cm_dll_set_freq(host); + + if (msm_host->use_14lpp_dll_reset && + !IS_ERR_OR_NULL(msm_host->xo_clk)) { + u32 mclk_freq = 0; + + config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG_2); + config &= CORE_FLL_CYCLE_CNT; + if (config) + mclk_freq = DIV_ROUND_CLOSEST_ULL((host->clock * 8), + clk_get_rate(msm_host->xo_clk)); + else + mclk_freq = DIV_ROUND_CLOSEST_ULL((host->clock * 4), + clk_get_rate(msm_host->xo_clk)); + + config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG_2); + config &= ~(0xFF << 10); + config |= mclk_freq << 10; + + writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG_2); + /* wait for 5us before enabling DLL clock */ + udelay(5); + } + + config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG); + config &= ~CORE_DLL_RST; + writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG); + + config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG); + config &= ~CORE_DLL_PDN; + writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG); + + if (msm_host->use_14lpp_dll_reset) { + msm_cm_dll_set_freq(host); + config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG_2); + config &= ~CORE_DLL_CLOCK_DISABLE; + writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG_2); + } + + config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG); + config |= CORE_DLL_EN; + writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG); + + config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG); + config |= CORE_CK_OUT_EN; + writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG); + + /* Wait until DLL_LOCK bit of DLL_STATUS register becomes '1' */ + while (!(readl_relaxed(host->ioaddr + CORE_DLL_STATUS) & + CORE_DLL_LOCK)) { + /* max. wait for 50us sec for LOCK bit to be set */ + if (--wait_cnt == 0) { + dev_err(mmc_dev(mmc), "%s: DLL failed to LOCK\n", + mmc_hostname(mmc)); + spin_unlock_irqrestore(&host->lock, flags); + return -ETIMEDOUT; + } + udelay(1); + } + + spin_unlock_irqrestore(&host->lock, flags); + return 0; +} + +static void msm_hc_select_default(struct sdhci_host *host) +{ + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + u32 config; + + if (!msm_host->use_cdclp533) { + config = readl_relaxed(host->ioaddr + + CORE_VENDOR_SPEC3); + config &= ~CORE_PWRSAVE_DLL; + writel_relaxed(config, host->ioaddr + + CORE_VENDOR_SPEC3); + } + + config = readl_relaxed(host->ioaddr + CORE_VENDOR_SPEC); + config &= ~CORE_HC_MCLK_SEL_MASK; + config |= CORE_HC_MCLK_SEL_DFLT; + writel_relaxed(config, host->ioaddr + CORE_VENDOR_SPEC); + + /* + * Disable HC_SELECT_IN to be able to use the UHS mode select + * configuration from Host Control2 register for all other + * modes. + * Write 0 to HC_SELECT_IN and HC_SELECT_IN_EN field + * in VENDOR_SPEC_FUNC + */ + config = readl_relaxed(host->ioaddr + CORE_VENDOR_SPEC); + config &= ~CORE_HC_SELECT_IN_EN; + config &= ~CORE_HC_SELECT_IN_MASK; + writel_relaxed(config, host->ioaddr + CORE_VENDOR_SPEC); + + /* + * Make sure above writes impacting free running MCLK are completed + * before changing the clk_rate at GCC. + */ + wmb(); +} + +static void msm_hc_select_hs400(struct sdhci_host *host) +{ + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + struct mmc_ios ios = host->mmc->ios; + u32 config, dll_lock; + int rc; + + /* Select the divided clock (free running MCLK/2) */ + config = readl_relaxed(host->ioaddr + CORE_VENDOR_SPEC); + config &= ~CORE_HC_MCLK_SEL_MASK; + config |= CORE_HC_MCLK_SEL_HS400; + + writel_relaxed(config, host->ioaddr + CORE_VENDOR_SPEC); + /* + * Select HS400 mode using the HC_SELECT_IN from VENDOR SPEC + * register + */ + if ((msm_host->tuning_done || ios.enhanced_strobe) && + !msm_host->calibration_done) { + config = readl_relaxed(host->ioaddr + CORE_VENDOR_SPEC); + config |= CORE_HC_SELECT_IN_HS400; + config |= CORE_HC_SELECT_IN_EN; + writel_relaxed(config, host->ioaddr + CORE_VENDOR_SPEC); + } + if (!msm_host->clk_rate && !msm_host->use_cdclp533) { + /* + * Poll on DLL_LOCK or DDR_DLL_LOCK bits in + * CORE_DLL_STATUS to be set. This should get set + * within 15 us at 200 MHz. + */ + rc = readl_relaxed_poll_timeout(host->ioaddr + + CORE_DLL_STATUS, + dll_lock, + (dll_lock & + (CORE_DLL_LOCK | + CORE_DDR_DLL_LOCK)), 10, + 1000); + if (rc == -ETIMEDOUT) + pr_err("%s: Unable to get DLL_LOCK/DDR_DLL_LOCK, dll_status: 0x%08x\n", + mmc_hostname(host->mmc), dll_lock); + } + /* + * Make sure above writes impacting free running MCLK are completed + * before changing the clk_rate at GCC. + */ + wmb(); +} + +/* + * sdhci_msm_hc_select_mode :- In general all timing modes are + * controlled via UHS mode select in Host Control2 register. + * eMMC specific HS200/HS400 doesn't have their respective modes + * defined here, hence we use these values. + * + * HS200 - SDR104 (Since they both are equivalent in functionality) + * HS400 - This involves multiple configurations + * Initially SDR104 - when tuning is required as HS200 + * Then when switching to DDR @ 400MHz (HS400) we use + * the vendor specific HC_SELECT_IN to control the mode. + * + * In addition to controlling the modes we also need to select the + * correct input clock for DLL depending on the mode. + * + * HS400 - divided clock (free running MCLK/2) + * All other modes - default (free running MCLK) + */ +static void sdhci_msm_hc_select_mode(struct sdhci_host *host) +{ + struct mmc_ios ios = host->mmc->ios; + + if (ios.timing == MMC_TIMING_MMC_HS400 || + host->flags & SDHCI_HS400_TUNING) + msm_hc_select_hs400(host); + else + msm_hc_select_default(host); +} + +static int sdhci_msm_cdclp533_calibration(struct sdhci_host *host) +{ + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + u32 config, calib_done; + int ret; + + pr_debug("%s: %s: Enter\n", mmc_hostname(host->mmc), __func__); + + /* + * Retuning in HS400 (DDR mode) will fail, just reset the + * tuning block and restore the saved tuning phase. + */ + ret = msm_init_cm_dll(host); + if (ret) + goto out; + + /* Set the selected phase in delay line hw block */ + ret = msm_config_cm_dll_phase(host, msm_host->saved_tuning_phase); + if (ret) + goto out; + + config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG); + config |= CORE_CMD_DAT_TRACK_SEL; + writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG); + + config = readl_relaxed(host->ioaddr + CORE_DDR_200_CFG); + config &= ~CORE_CDC_T4_DLY_SEL; + writel_relaxed(config, host->ioaddr + CORE_DDR_200_CFG); + + config = readl_relaxed(host->ioaddr + CORE_CSR_CDC_GEN_CFG); + config &= ~CORE_CDC_SWITCH_BYPASS_OFF; + writel_relaxed(config, host->ioaddr + CORE_CSR_CDC_GEN_CFG); + + config = readl_relaxed(host->ioaddr + CORE_CSR_CDC_GEN_CFG); + config |= CORE_CDC_SWITCH_RC_EN; + writel_relaxed(config, host->ioaddr + CORE_CSR_CDC_GEN_CFG); + + config = readl_relaxed(host->ioaddr + CORE_DDR_200_CFG); + config &= ~CORE_START_CDC_TRAFFIC; + writel_relaxed(config, host->ioaddr + CORE_DDR_200_CFG); + + /* Perform CDC Register Initialization Sequence */ + + writel_relaxed(0x11800EC, host->ioaddr + CORE_CSR_CDC_CTLR_CFG0); + writel_relaxed(0x3011111, host->ioaddr + CORE_CSR_CDC_CTLR_CFG1); + writel_relaxed(0x1201000, host->ioaddr + CORE_CSR_CDC_CAL_TIMER_CFG0); + writel_relaxed(0x4, host->ioaddr + CORE_CSR_CDC_CAL_TIMER_CFG1); + writel_relaxed(0xCB732020, host->ioaddr + CORE_CSR_CDC_REFCOUNT_CFG); + writel_relaxed(0xB19, host->ioaddr + CORE_CSR_CDC_COARSE_CAL_CFG); + writel_relaxed(0x4E2, host->ioaddr + CORE_CSR_CDC_DELAY_CFG); + writel_relaxed(0x0, host->ioaddr + CORE_CDC_OFFSET_CFG); + writel_relaxed(0x16334, host->ioaddr + CORE_CDC_SLAVE_DDA_CFG); + + /* CDC HW Calibration */ + + config = readl_relaxed(host->ioaddr + CORE_CSR_CDC_CTLR_CFG0); + config |= CORE_SW_TRIG_FULL_CALIB; + writel_relaxed(config, host->ioaddr + CORE_CSR_CDC_CTLR_CFG0); + + config = readl_relaxed(host->ioaddr + CORE_CSR_CDC_CTLR_CFG0); + config &= ~CORE_SW_TRIG_FULL_CALIB; + writel_relaxed(config, host->ioaddr + CORE_CSR_CDC_CTLR_CFG0); + + config = readl_relaxed(host->ioaddr + CORE_CSR_CDC_CTLR_CFG0); + config |= CORE_HW_AUTOCAL_ENA; + writel_relaxed(config, host->ioaddr + CORE_CSR_CDC_CTLR_CFG0); + + config = readl_relaxed(host->ioaddr + CORE_CSR_CDC_CAL_TIMER_CFG0); + config |= CORE_TIMER_ENA; + writel_relaxed(config, host->ioaddr + CORE_CSR_CDC_CAL_TIMER_CFG0); + + ret = readl_relaxed_poll_timeout(host->ioaddr + CORE_CSR_CDC_STATUS0, + calib_done, + (calib_done & CORE_CALIBRATION_DONE), + 1, 50); + + if (ret == -ETIMEDOUT) { + pr_err("%s: %s: CDC calibration was not completed\n", + mmc_hostname(host->mmc), __func__); + goto out; + } + + ret = readl_relaxed(host->ioaddr + CORE_CSR_CDC_STATUS0) + & CORE_CDC_ERROR_CODE_MASK; + if (ret) { + pr_err("%s: %s: CDC error code %d\n", + mmc_hostname(host->mmc), __func__, ret); + ret = -EINVAL; + goto out; + } + + config = readl_relaxed(host->ioaddr + CORE_DDR_200_CFG); + config |= CORE_START_CDC_TRAFFIC; + writel_relaxed(config, host->ioaddr + CORE_DDR_200_CFG); +out: + pr_debug("%s: %s: Exit, ret %d\n", mmc_hostname(host->mmc), + __func__, ret); + return ret; +} + +static int sdhci_msm_cm_dll_sdc4_calibration(struct sdhci_host *host) +{ + struct mmc_host *mmc = host->mmc; + u32 dll_status, config; + int ret; + + pr_debug("%s: %s: Enter\n", mmc_hostname(host->mmc), __func__); + + /* + * Currently the CORE_DDR_CONFIG register defaults to desired + * configuration on reset. Currently reprogramming the power on + * reset (POR) value in case it might have been modified by + * bootloaders. In the future, if this changes, then the desired + * values will need to be programmed appropriately. + */ + writel_relaxed(DDR_CONFIG_POR_VAL, host->ioaddr + CORE_DDR_CONFIG); + + if (mmc->ios.enhanced_strobe) { + config = readl_relaxed(host->ioaddr + CORE_DDR_200_CFG); + config |= CORE_CMDIN_RCLK_EN; + writel_relaxed(config, host->ioaddr + CORE_DDR_200_CFG); + } + + config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG_2); + config |= CORE_DDR_CAL_EN; + writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG_2); + + ret = readl_relaxed_poll_timeout(host->ioaddr + CORE_DLL_STATUS, + dll_status, + (dll_status & CORE_DDR_DLL_LOCK), + 10, 1000); + + if (ret == -ETIMEDOUT) { + pr_err("%s: %s: CM_DLL_SDC4 calibration was not completed\n", + mmc_hostname(host->mmc), __func__); + goto out; + } + + config = readl_relaxed(host->ioaddr + CORE_VENDOR_SPEC3); + config |= CORE_PWRSAVE_DLL; + writel_relaxed(config, host->ioaddr + CORE_VENDOR_SPEC3); + + /* + * Drain writebuffer to ensure above DLL calibration + * and PWRSAVE DLL is enabled. + */ + wmb(); +out: + pr_debug("%s: %s: Exit, ret %d\n", mmc_hostname(host->mmc), + __func__, ret); + return ret; +} + +static int sdhci_msm_hs400_dll_calibration(struct sdhci_host *host) +{ + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + struct mmc_host *mmc = host->mmc; + int ret; + u32 config; + + pr_debug("%s: %s: Enter\n", mmc_hostname(host->mmc), __func__); + + /* + * Retuning in HS400 (DDR mode) will fail, just reset the + * tuning block and restore the saved tuning phase. + */ + ret = msm_init_cm_dll(host); + if (ret) + goto out; + + if (!mmc->ios.enhanced_strobe) { + /* Set the selected phase in delay line hw block */ + ret = msm_config_cm_dll_phase(host, + msm_host->saved_tuning_phase); + if (ret) + goto out; + config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG); + config |= CORE_CMD_DAT_TRACK_SEL; + writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG); + } + + if (msm_host->use_cdclp533) + ret = sdhci_msm_cdclp533_calibration(host); + else + ret = sdhci_msm_cm_dll_sdc4_calibration(host); +out: + pr_debug("%s: %s: Exit, ret %d\n", mmc_hostname(host->mmc), + __func__, ret); + return ret; +} + +static int sdhci_msm_execute_tuning(struct mmc_host *mmc, u32 opcode) +{ + struct sdhci_host *host = mmc_priv(mmc); + int tuning_seq_cnt = 3; + u8 phase, tuned_phases[16], tuned_phase_cnt = 0; + int rc; + struct mmc_ios ios = host->mmc->ios; + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + + /* + * Tuning is required for SDR104, HS200 and HS400 cards and + * if clock frequency is greater than 100MHz in these modes. + */ + if (host->clock <= CORE_FREQ_100MHZ || + !(ios.timing == MMC_TIMING_MMC_HS400 || + ios.timing == MMC_TIMING_MMC_HS200 || + ios.timing == MMC_TIMING_UHS_SDR104)) + return 0; + + /* + * For HS400 tuning in HS200 timing requires: + * - select MCLK/2 in VENDOR_SPEC + * - program MCLK to 400MHz (or nearest supported) in GCC + */ + if (host->flags & SDHCI_HS400_TUNING) { + sdhci_msm_hc_select_mode(host); + msm_set_clock_rate_for_bus_mode(host, ios.clock); + host->flags &= ~SDHCI_HS400_TUNING; + } + +retry: + /* First of all reset the tuning block */ + rc = msm_init_cm_dll(host); + if (rc) + return rc; + + phase = 0; + do { + /* Set the phase in delay line hw block */ + rc = msm_config_cm_dll_phase(host, phase); + if (rc) + return rc; + + msm_host->saved_tuning_phase = phase; + rc = mmc_send_tuning(mmc, opcode, NULL); + if (!rc) { + /* Tuning is successful at this tuning point */ + tuned_phases[tuned_phase_cnt++] = phase; + dev_dbg(mmc_dev(mmc), "%s: Found good phase = %d\n", + mmc_hostname(mmc), phase); + } + } while (++phase < ARRAY_SIZE(tuned_phases)); + + if (tuned_phase_cnt) { + rc = msm_find_most_appropriate_phase(host, tuned_phases, + tuned_phase_cnt); + if (rc < 0) + return rc; + else + phase = rc; + + /* + * Finally set the selected phase in delay + * line hw block. + */ + rc = msm_config_cm_dll_phase(host, phase); + if (rc) + return rc; + dev_dbg(mmc_dev(mmc), "%s: Setting the tuning phase to %d\n", + mmc_hostname(mmc), phase); + } else { + if (--tuning_seq_cnt) + goto retry; + /* Tuning failed */ + dev_dbg(mmc_dev(mmc), "%s: No tuning point found\n", + mmc_hostname(mmc)); + rc = -EIO; + } + + if (!rc) + msm_host->tuning_done = true; + return rc; +} + +/* + * sdhci_msm_hs400 - Calibrate the DLL for HS400 bus speed mode operation. + * This needs to be done for both tuning and enhanced_strobe mode. + * DLL operation is only needed for clock > 100MHz. For clock <= 100MHz + * fixed feedback clock is used. + */ +static void sdhci_msm_hs400(struct sdhci_host *host, struct mmc_ios *ios) +{ + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + int ret; + + if (host->clock > CORE_FREQ_100MHZ && + (msm_host->tuning_done || ios->enhanced_strobe) && + !msm_host->calibration_done) { + ret = sdhci_msm_hs400_dll_calibration(host); + if (!ret) + msm_host->calibration_done = true; + else + pr_err("%s: Failed to calibrate DLL for hs400 mode (%d)\n", + mmc_hostname(host->mmc), ret); + } +} + +static void sdhci_msm_set_uhs_signaling(struct sdhci_host *host, + unsigned int uhs) +{ + struct mmc_host *mmc = host->mmc; + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + u16 ctrl_2; + u32 config; + + ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2); + /* Select Bus Speed Mode for host */ + ctrl_2 &= ~SDHCI_CTRL_UHS_MASK; + switch (uhs) { + case MMC_TIMING_UHS_SDR12: + ctrl_2 |= SDHCI_CTRL_UHS_SDR12; + break; + case MMC_TIMING_UHS_SDR25: + ctrl_2 |= SDHCI_CTRL_UHS_SDR25; + break; + case MMC_TIMING_UHS_SDR50: + ctrl_2 |= SDHCI_CTRL_UHS_SDR50; + break; + case MMC_TIMING_MMC_HS400: + case MMC_TIMING_MMC_HS200: + case MMC_TIMING_UHS_SDR104: + ctrl_2 |= SDHCI_CTRL_UHS_SDR104; + break; + case MMC_TIMING_UHS_DDR50: + case MMC_TIMING_MMC_DDR52: + ctrl_2 |= SDHCI_CTRL_UHS_DDR50; + break; + } + + /* + * When clock frequency is less than 100MHz, the feedback clock must be + * provided and DLL must not be used so that tuning can be skipped. To + * provide feedback clock, the mode selection can be any value less + * than 3'b011 in bits [2:0] of HOST CONTROL2 register. + */ + if (host->clock <= CORE_FREQ_100MHZ) { + if (uhs == MMC_TIMING_MMC_HS400 || + uhs == MMC_TIMING_MMC_HS200 || + uhs == MMC_TIMING_UHS_SDR104) + ctrl_2 &= ~SDHCI_CTRL_UHS_MASK; + /* + * DLL is not required for clock <= 100MHz + * Thus, make sure DLL it is disabled when not required + */ + config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG); + config |= CORE_DLL_RST; + writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG); + + config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG); + config |= CORE_DLL_PDN; + writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG); + + /* + * The DLL needs to be restored and CDCLP533 recalibrated + * when the clock frequency is set back to 400MHz. + */ + msm_host->calibration_done = false; + } + + dev_dbg(mmc_dev(mmc), "%s: clock=%u uhs=%u ctrl_2=0x%x\n", + mmc_hostname(host->mmc), host->clock, uhs, ctrl_2); + sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2); + + if (mmc->ios.timing == MMC_TIMING_MMC_HS400) + sdhci_msm_hs400(host, &mmc->ios); +} + +static inline void sdhci_msm_init_pwr_irq_wait(struct sdhci_msm_host *msm_host) +{ + init_waitqueue_head(&msm_host->pwr_irq_wait); +} + +static inline void sdhci_msm_complete_pwr_irq_wait( + struct sdhci_msm_host *msm_host) +{ + wake_up(&msm_host->pwr_irq_wait); +} + +/* + * sdhci_msm_check_power_status API should be called when registers writes + * which can toggle sdhci IO bus ON/OFF or change IO lines HIGH/LOW happens. + * To what state the register writes will change the IO lines should be passed + * as the argument req_type. This API will check whether the IO line's state + * is already the expected state and will wait for power irq only if + * power irq is expected to be trigerred based on the current IO line state + * and expected IO line state. + */ +static void sdhci_msm_check_power_status(struct sdhci_host *host, u32 req_type) +{ + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + bool done = false; + u32 val; + + pr_debug("%s: %s: request %d curr_pwr_state %x curr_io_level %x\n", + mmc_hostname(host->mmc), __func__, req_type, + msm_host->curr_pwr_state, msm_host->curr_io_level); + + /* + * The power interrupt will not be generated for signal voltage + * switches if SWITCHABLE_SIGNALING_VOLTAGE in MCI_GENERICS is not set. + */ + val = readl(msm_host->core_mem + CORE_MCI_GENERICS); + if ((req_type & REQ_IO_HIGH || req_type & REQ_IO_LOW) && + !(val & SWITCHABLE_SIGNALING_VOLTAGE)) { + return; + } + + /* + * The IRQ for request type IO High/LOW will be generated when - + * there is a state change in 1.8V enable bit (bit 3) of + * SDHCI_HOST_CONTROL2 register. The reset state of that bit is 0 + * which indicates 3.3V IO voltage. So, when MMC core layer tries + * to set it to 3.3V before card detection happens, the + * IRQ doesn't get triggered as there is no state change in this bit. + * The driver already handles this case by changing the IO voltage + * level to high as part of controller power up sequence. Hence, check + * for host->pwr to handle a case where IO voltage high request is + * issued even before controller power up. + */ + if ((req_type & REQ_IO_HIGH) && !host->pwr) { + pr_debug("%s: do not wait for power IRQ that never comes, req_type: %d\n", + mmc_hostname(host->mmc), req_type); + return; + } + if ((req_type & msm_host->curr_pwr_state) || + (req_type & msm_host->curr_io_level)) + done = true; + /* + * This is needed here to handle cases where register writes will + * not change the current bus state or io level of the controller. + * In this case, no power irq will be triggerred and we should + * not wait. + */ + if (!done) { + if (!wait_event_timeout(msm_host->pwr_irq_wait, + msm_host->pwr_irq_flag, + msecs_to_jiffies(MSM_PWR_IRQ_TIMEOUT_MS))) + dev_warn(&msm_host->pdev->dev, + "%s: pwr_irq for req: (%d) timed out\n", + mmc_hostname(host->mmc), req_type); + } + pr_debug("%s: %s: request %d done\n", mmc_hostname(host->mmc), + __func__, req_type); +} + +static void sdhci_msm_dump_pwr_ctrl_regs(struct sdhci_host *host) +{ + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + + pr_err("%s: PWRCTL_STATUS: 0x%08x | PWRCTL_MASK: 0x%08x | PWRCTL_CTL: 0x%08x\n", + mmc_hostname(host->mmc), + readl_relaxed(msm_host->core_mem + CORE_PWRCTL_STATUS), + readl_relaxed(msm_host->core_mem + CORE_PWRCTL_MASK), + readl_relaxed(msm_host->core_mem + CORE_PWRCTL_CTL)); +} + +static void sdhci_msm_handle_pwr_irq(struct sdhci_host *host, int irq) +{ + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + u32 irq_status, irq_ack = 0; + int retry = 10; + u32 pwr_state = 0, io_level = 0; + u32 config; + + irq_status = readl_relaxed(msm_host->core_mem + CORE_PWRCTL_STATUS); + irq_status &= INT_MASK; + + writel_relaxed(irq_status, msm_host->core_mem + CORE_PWRCTL_CLEAR); + + /* + * There is a rare HW scenario where the first clear pulse could be + * lost when actual reset and clear/read of status register is + * happening at a time. Hence, retry for at least 10 times to make + * sure status register is cleared. Otherwise, this will result in + * a spurious power IRQ resulting in system instability. + */ + while (irq_status & readl_relaxed(msm_host->core_mem + + CORE_PWRCTL_STATUS)) { + if (retry == 0) { + pr_err("%s: Timedout clearing (0x%x) pwrctl status register\n", + mmc_hostname(host->mmc), irq_status); + sdhci_msm_dump_pwr_ctrl_regs(host); + WARN_ON(1); + break; + } + writel_relaxed(irq_status, + msm_host->core_mem + CORE_PWRCTL_CLEAR); + retry--; + udelay(10); + } + + /* Handle BUS ON/OFF*/ + if (irq_status & CORE_PWRCTL_BUS_ON) { + pwr_state = REQ_BUS_ON; + io_level = REQ_IO_HIGH; + irq_ack |= CORE_PWRCTL_BUS_SUCCESS; + } + if (irq_status & CORE_PWRCTL_BUS_OFF) { + pwr_state = REQ_BUS_OFF; + io_level = REQ_IO_LOW; + irq_ack |= CORE_PWRCTL_BUS_SUCCESS; + } + /* Handle IO LOW/HIGH */ + if (irq_status & CORE_PWRCTL_IO_LOW) { + io_level = REQ_IO_LOW; + irq_ack |= CORE_PWRCTL_IO_SUCCESS; + } + if (irq_status & CORE_PWRCTL_IO_HIGH) { + io_level = REQ_IO_HIGH; + irq_ack |= CORE_PWRCTL_IO_SUCCESS; + } + + /* + * The driver has to acknowledge the interrupt, switch voltages and + * report back if it succeded or not to this register. The voltage + * switches are handled by the sdhci core, so just report success. + */ + writel_relaxed(irq_ack, msm_host->core_mem + CORE_PWRCTL_CTL); + + /* + * If we don't have info regarding the voltage levels supported by + * regulators, don't change the IO PAD PWR SWITCH. + */ + if (msm_host->caps_0 & CORE_VOLT_SUPPORT) { + u32 new_config; + /* + * We should unset IO PAD PWR switch only if the register write + * can set IO lines high and the regulator also switches to 3 V. + * Else, we should keep the IO PAD PWR switch set. + * This is applicable to certain targets where eMMC vccq supply + * is only 1.8V. In such targets, even during REQ_IO_HIGH, the + * IO PAD PWR switch must be kept set to reflect actual + * regulator voltage. This way, during initialization of + * controllers with only 1.8V, we will set the IO PAD bit + * without waiting for a REQ_IO_LOW. + */ + config = readl_relaxed(host->ioaddr + CORE_VENDOR_SPEC); + new_config = config; + + if ((io_level & REQ_IO_HIGH) && + (msm_host->caps_0 & CORE_3_0V_SUPPORT)) + new_config &= ~CORE_IO_PAD_PWR_SWITCH; + else if ((io_level & REQ_IO_LOW) || + (msm_host->caps_0 & CORE_1_8V_SUPPORT)) + new_config |= CORE_IO_PAD_PWR_SWITCH; + + if (config ^ new_config) + writel_relaxed(new_config, + host->ioaddr + CORE_VENDOR_SPEC); + } + + if (pwr_state) + msm_host->curr_pwr_state = pwr_state; + if (io_level) + msm_host->curr_io_level = io_level; + + pr_debug("%s: %s: Handled IRQ(%d), irq_status=0x%x, ack=0x%x\n", + mmc_hostname(msm_host->mmc), __func__, irq, irq_status, + irq_ack); +} + +static irqreturn_t sdhci_msm_pwr_irq(int irq, void *data) +{ + struct sdhci_host *host = (struct sdhci_host *)data; + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + + sdhci_msm_handle_pwr_irq(host, irq); + msm_host->pwr_irq_flag = 1; + sdhci_msm_complete_pwr_irq_wait(msm_host); + + + return IRQ_HANDLED; +} + +static unsigned int sdhci_msm_get_max_clock(struct sdhci_host *host) +{ + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + struct clk *core_clk = msm_host->bulk_clks[0].clk; + + return clk_round_rate(core_clk, ULONG_MAX); +} + +static unsigned int sdhci_msm_get_min_clock(struct sdhci_host *host) +{ + return SDHCI_MSM_MIN_CLOCK; +} + +/** + * __sdhci_msm_set_clock - sdhci_msm clock control. + * + * Description: + * MSM controller does not use internal divider and + * instead directly control the GCC clock as per + * HW recommendation. + **/ +static void __sdhci_msm_set_clock(struct sdhci_host *host, unsigned int clock) +{ + u16 clk; + /* + * Keep actual_clock as zero - + * - since there is no divider used so no need of having actual_clock. + * - MSM controller uses SDCLK for data timeout calculation. If + * actual_clock is zero, host->clock is taken for calculation. + */ + host->mmc->actual_clock = 0; + + sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL); + + if (clock == 0) + return; + + /* + * MSM controller do not use clock divider. + * Thus read SDHCI_CLOCK_CONTROL and only enable + * clock with no divider value programmed. + */ + clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL); + sdhci_enable_clk(host, clk); +} + +/* sdhci_msm_set_clock - Called with (host->lock) spinlock held. */ +static void sdhci_msm_set_clock(struct sdhci_host *host, unsigned int clock) +{ + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + + if (!clock) { + msm_host->clk_rate = clock; + goto out; + } + + sdhci_msm_hc_select_mode(host); + + msm_set_clock_rate_for_bus_mode(host, clock); +out: + __sdhci_msm_set_clock(host, clock); +} + +/* + * Platform specific register write functions. This is so that, if any + * register write needs to be followed up by platform specific actions, + * they can be added here. These functions can go to sleep when writes + * to certain registers are done. + * These functions are relying on sdhci_set_ios not using spinlock. + */ +static int __sdhci_msm_check_write(struct sdhci_host *host, u16 val, int reg) +{ + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + u32 req_type = 0; + + switch (reg) { + case SDHCI_HOST_CONTROL2: + req_type = (val & SDHCI_CTRL_VDD_180) ? REQ_IO_LOW : + REQ_IO_HIGH; + break; + case SDHCI_SOFTWARE_RESET: + if (host->pwr && (val & SDHCI_RESET_ALL)) + req_type = REQ_BUS_OFF; + break; + case SDHCI_POWER_CONTROL: + req_type = !val ? REQ_BUS_OFF : REQ_BUS_ON; + break; + } + + if (req_type) { + msm_host->pwr_irq_flag = 0; + /* + * Since this register write may trigger a power irq, ensure + * all previous register writes are complete by this point. + */ + mb(); + } + return req_type; +} + +/* This function may sleep*/ +static void sdhci_msm_writew(struct sdhci_host *host, u16 val, int reg) +{ + u32 req_type = 0; + + req_type = __sdhci_msm_check_write(host, val, reg); + writew_relaxed(val, host->ioaddr + reg); + + if (req_type) + sdhci_msm_check_power_status(host, req_type); +} + +/* This function may sleep*/ +static void sdhci_msm_writeb(struct sdhci_host *host, u8 val, int reg) +{ + u32 req_type = 0; + + req_type = __sdhci_msm_check_write(host, val, reg); + + writeb_relaxed(val, host->ioaddr + reg); + + if (req_type) + sdhci_msm_check_power_status(host, req_type); +} + +<<<<<<< +static int sdhci_msm_set_icc(struct sdhci_msm_host *msm_host, unsigned int rate) +{ + + if (IS_ERR(msm_host->path)) { + WARN_ON(1); + return 0; + } + + if (rate == INT_MAX) + icc_set(msm_host->path, 2048000, 4096000); + else + icc_set(msm_host->path, 0, 0); + + return 0; +} + +static void sdhci_msm_deinit_icc(struct sdhci_msm_host *msm_host) +{ + if (!IS_ERR(msm_host->path)) + icc_put(msm_host->path); +======= +static void sdhci_msm_set_regulator_caps(struct sdhci_msm_host *msm_host) +{ + struct mmc_host *mmc = msm_host->mmc; + struct regulator *supply = mmc->supply.vqmmc; + u32 caps = 0, config; + struct sdhci_host *host = mmc_priv(mmc); + + if (!IS_ERR(mmc->supply.vqmmc)) { + if (regulator_is_supported_voltage(supply, 1700000, 1950000)) + caps |= CORE_1_8V_SUPPORT; + if (regulator_is_supported_voltage(supply, 2700000, 3600000)) + caps |= CORE_3_0V_SUPPORT; + + if (!caps) + pr_warn("%s: 1.8/3V not supported for vqmmc\n", + mmc_hostname(mmc)); + } + + if (caps) { + /* + * Set the PAD_PWR_SWITCH_EN bit so that the PAD_PWR_SWITCH + * bit can be used as required later on. + */ + u32 io_level = msm_host->curr_io_level; + + config = readl_relaxed(host->ioaddr + CORE_VENDOR_SPEC); + config |= CORE_IO_PAD_PWR_SWITCH_EN; + + if ((io_level & REQ_IO_HIGH) && (caps & CORE_3_0V_SUPPORT)) + config &= ~CORE_IO_PAD_PWR_SWITCH; + else if ((io_level & REQ_IO_LOW) || (caps & CORE_1_8V_SUPPORT)) + config |= CORE_IO_PAD_PWR_SWITCH; + + writel_relaxed(config, host->ioaddr + CORE_VENDOR_SPEC); + } + msm_host->caps_0 |= caps; + pr_debug("%s: supported caps: 0x%08x\n", mmc_hostname(mmc), caps); +>>>>>>> +} + +static const struct of_device_id sdhci_msm_dt_match[] = { + { .compatible = "qcom,sdhci-msm-v4" }, + {}, +}; + +MODULE_DEVICE_TABLE(of, sdhci_msm_dt_match); + +static const struct sdhci_ops sdhci_msm_ops = { + .reset = sdhci_reset, + .set_clock = sdhci_msm_set_clock, + .get_min_clock = sdhci_msm_get_min_clock, + .get_max_clock = sdhci_msm_get_max_clock, + .set_bus_width = sdhci_set_bus_width, + .set_uhs_signaling = sdhci_msm_set_uhs_signaling, + .write_w = sdhci_msm_writew, + .write_b = sdhci_msm_writeb, +}; + +static const struct sdhci_pltfm_data sdhci_msm_pdata = { + .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION | + SDHCI_QUIRK_SINGLE_POWER_WRITE | + SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN, + .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN, + .ops = &sdhci_msm_ops, +}; + +static int sdhci_msm_probe(struct platform_device *pdev) +{ + struct sdhci_host *host; + struct sdhci_pltfm_host *pltfm_host; + struct sdhci_msm_host *msm_host; + struct resource *core_memres; + struct clk *clk; + int ret; + u16 host_version, core_minor; + u32 core_version, config; + u8 core_major; + + host = sdhci_pltfm_init(pdev, &sdhci_msm_pdata, sizeof(*msm_host)); + if (IS_ERR(host)) + return PTR_ERR(host); + + host->sdma_boundary = 0; + pltfm_host = sdhci_priv(host); + msm_host = sdhci_pltfm_priv(pltfm_host); + msm_host->mmc = host->mmc; + msm_host->pdev = pdev; + + ret = mmc_of_parse(host->mmc); + if (ret) + goto pltfm_free; + + sdhci_get_of_property(pdev); + + msm_host->saved_tuning_phase = INVALID_TUNING_PHASE; + + /* Setup SDCC bus voter clock. */ + msm_host->bus_clk = devm_clk_get(&pdev->dev, "bus"); + if (!IS_ERR(msm_host->bus_clk)) { + /* Vote for max. clk rate for max. performance */ + ret = clk_set_rate(msm_host->bus_clk, INT_MAX); + if (ret) + goto pltfm_free; + ret = clk_prepare_enable(msm_host->bus_clk); + if (ret) + goto pltfm_free; + } + + /* Setup main peripheral bus clock */ + clk = devm_clk_get(&pdev->dev, "iface"); + if (IS_ERR(clk)) { + ret = PTR_ERR(clk); + dev_err(&pdev->dev, "Peripheral clk setup failed (%d)\n", ret); + goto bus_clk_disable; + } + msm_host->bulk_clks[1].clk = clk; + + /* Setup SDC MMC clock */ + clk = devm_clk_get(&pdev->dev, "core"); + if (IS_ERR(clk)) { + ret = PTR_ERR(clk); + dev_err(&pdev->dev, "SDC MMC clk setup failed (%d)\n", ret); + goto bus_clk_disable; + } + msm_host->bulk_clks[0].clk = clk; + + /* Vote for maximum clock rate for maximum performance */ + ret = clk_set_rate(clk, INT_MAX); + if (ret) + dev_warn(&pdev->dev, "core clock boost failed\n"); + + clk = devm_clk_get(&pdev->dev, "cal"); + if (IS_ERR(clk)) + clk = NULL; + msm_host->bulk_clks[2].clk = clk; + + clk = devm_clk_get(&pdev->dev, "sleep"); + if (IS_ERR(clk)) + clk = NULL; + msm_host->bulk_clks[3].clk = clk; + + ret = clk_bulk_prepare_enable(ARRAY_SIZE(msm_host->bulk_clks), + msm_host->bulk_clks); + if (ret) + goto bus_clk_disable; + + msm_host->path = of_icc_get(&pdev->dev, "ddr"); + if (IS_ERR(msm_host->path)) { + ret = PTR_ERR(msm_host->path); + goto clk_disable; + } + sdhci_msm_set_icc(msm_host, INT_MAX); + + /* + * xo clock is needed for FLL feature of cm_dll. + * In case if xo clock is not mentioned in DT, warn and proceed. + */ + msm_host->xo_clk = devm_clk_get(&pdev->dev, "xo"); + if (IS_ERR(msm_host->xo_clk)) { + ret = PTR_ERR(msm_host->xo_clk); + dev_warn(&pdev->dev, "TCXO clk not present (%d)\n", ret); + } + + core_memres = platform_get_resource(pdev, IORESOURCE_MEM, 1); + msm_host->core_mem = devm_ioremap_resource(&pdev->dev, core_memres); + + if (IS_ERR(msm_host->core_mem)) { + dev_err(&pdev->dev, "Failed to remap registers\n"); + ret = PTR_ERR(msm_host->core_mem); + goto clk_disable; + } + + /* Reset the vendor spec register to power on reset state */ + writel_relaxed(CORE_VENDOR_SPEC_POR_VAL, + host->ioaddr + CORE_VENDOR_SPEC); + + /* Set HC_MODE_EN bit in HC_MODE register */ + writel_relaxed(HC_MODE_EN, (msm_host->core_mem + CORE_HC_MODE)); + + config = readl_relaxed(msm_host->core_mem + CORE_HC_MODE); + config |= FF_CLK_SW_RST_DIS; + writel_relaxed(config, msm_host->core_mem + CORE_HC_MODE); + + host_version = readw_relaxed((host->ioaddr + SDHCI_HOST_VERSION)); + dev_dbg(&pdev->dev, "Host Version: 0x%x Vendor Version 0x%x\n", + host_version, ((host_version & SDHCI_VENDOR_VER_MASK) >> + SDHCI_VENDOR_VER_SHIFT)); + + core_version = readl_relaxed(msm_host->core_mem + CORE_MCI_VERSION); + core_major = (core_version & CORE_VERSION_MAJOR_MASK) >> + CORE_VERSION_MAJOR_SHIFT; + core_minor = core_version & CORE_VERSION_MINOR_MASK; + dev_dbg(&pdev->dev, "MCI Version: 0x%08x, major: 0x%04x, minor: 0x%02x\n", + core_version, core_major, core_minor); + + if (core_major == 1 && core_minor >= 0x42) + msm_host->use_14lpp_dll_reset = true; + + /* + * SDCC 5 controller with major version 1, minor version 0x34 and later + * with HS 400 mode support will use CM DLL instead of CDC LP 533 DLL. + */ + if (core_major == 1 && core_minor < 0x34) + msm_host->use_cdclp533 = true; + + /* + * Support for some capabilities is not advertised by newer + * controller versions and must be explicitly enabled. + */ + if (core_major >= 1 && core_minor != 0x11 && core_minor != 0x12) { + config = readl_relaxed(host->ioaddr + SDHCI_CAPABILITIES); + config |= SDHCI_CAN_VDD_300 | SDHCI_CAN_DO_8BIT; + writel_relaxed(config, host->ioaddr + + CORE_VENDOR_SPEC_CAPABILITIES0); + } + + /* + * Power on reset state may trigger power irq if previous status of + * PWRCTL was either BUS_ON or IO_HIGH_V. So before enabling pwr irq + * interrupt in GIC, any pending power irq interrupt should be + * acknowledged. Otherwise power irq interrupt handler would be + * fired prematurely. + */ + sdhci_msm_handle_pwr_irq(host, 0); + + /* + * Ensure that above writes are propogated before interrupt enablement + * in GIC. + */ + mb(); + + /* Setup IRQ for handling power/voltage tasks with PMIC */ + msm_host->pwr_irq = platform_get_irq_byname(pdev, "pwr_irq"); + if (msm_host->pwr_irq < 0) { + dev_err(&pdev->dev, "Get pwr_irq failed (%d)\n", + msm_host->pwr_irq); + ret = msm_host->pwr_irq; + goto clk_disable; + } + + sdhci_msm_init_pwr_irq_wait(msm_host); + /* Enable pwr irq interrupts */ + writel_relaxed(INT_MASK, msm_host->core_mem + CORE_PWRCTL_MASK); + + ret = devm_request_threaded_irq(&pdev->dev, msm_host->pwr_irq, NULL, + sdhci_msm_pwr_irq, IRQF_ONESHOT, + dev_name(&pdev->dev), host); + if (ret) { + dev_err(&pdev->dev, "Request IRQ failed (%d)\n", ret); + goto clk_disable; + } + + pm_runtime_get_noresume(&pdev->dev); + pm_runtime_set_active(&pdev->dev); + pm_runtime_enable(&pdev->dev); + pm_runtime_set_autosuspend_delay(&pdev->dev, + MSM_MMC_AUTOSUSPEND_DELAY_MS); + pm_runtime_use_autosuspend(&pdev->dev); + + host->mmc_host_ops.execute_tuning = sdhci_msm_execute_tuning; + ret = sdhci_add_host(host); + if (ret) + goto pm_runtime_disable; + sdhci_msm_set_regulator_caps(msm_host); + + pm_runtime_mark_last_busy(&pdev->dev); + pm_runtime_put_autosuspend(&pdev->dev); + + return 0; + +pm_runtime_disable: + pm_runtime_disable(&pdev->dev); + pm_runtime_set_suspended(&pdev->dev); + pm_runtime_put_noidle(&pdev->dev); +clk_disable: + clk_bulk_disable_unprepare(ARRAY_SIZE(msm_host->bulk_clks), + msm_host->bulk_clks); +bus_clk_disable: + if (!IS_ERR(msm_host->bus_clk)) + clk_disable_unprepare(msm_host->bus_clk); +pltfm_free: + sdhci_pltfm_free(pdev); + return ret; +} + +static int sdhci_msm_remove(struct platform_device *pdev) +{ + struct sdhci_host *host = platform_get_drvdata(pdev); + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + int dead = (readl_relaxed(host->ioaddr + SDHCI_INT_STATUS) == + 0xffffffff); + + sdhci_remove_host(host, dead); + + pm_runtime_get_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); + pm_runtime_put_noidle(&pdev->dev); + + clk_bulk_disable_unprepare(ARRAY_SIZE(msm_host->bulk_clks), + msm_host->bulk_clks); + sdhci_msm_deinit_icc(msm_host); + + if (!IS_ERR(msm_host->bus_clk)) + clk_disable_unprepare(msm_host->bus_clk); + sdhci_pltfm_free(pdev); + return 0; +} + +#ifdef CONFIG_PM +static int sdhci_msm_runtime_suspend(struct device *dev) +{ + struct sdhci_host *host = dev_get_drvdata(dev); + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + + clk_bulk_disable_unprepare(ARRAY_SIZE(msm_host->bulk_clks), + msm_host->bulk_clks); + + return 0; +} + +static int sdhci_msm_runtime_resume(struct device *dev) +{ + struct sdhci_host *host = dev_get_drvdata(dev); + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + + return clk_bulk_prepare_enable(ARRAY_SIZE(msm_host->bulk_clks), + msm_host->bulk_clks); +} +#endif + +static const struct dev_pm_ops sdhci_msm_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, + pm_runtime_force_resume) + SET_RUNTIME_PM_OPS(sdhci_msm_runtime_suspend, + sdhci_msm_runtime_resume, + NULL) +}; + +static struct platform_driver sdhci_msm_driver = { + .probe = sdhci_msm_probe, + .remove = sdhci_msm_remove, + .driver = { + .name = "sdhci_msm", + .of_match_table = sdhci_msm_dt_match, + .pm = &sdhci_msm_pm_ops, + }, +}; + +module_platform_driver(sdhci_msm_driver); + +MODULE_DESCRIPTION("Qualcomm Secure Digital Host Controller Interface driver"); +MODULE_LICENSE("GPL v2"); |