diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/brcm/emmc/emmc_chal_sd.c | 1017 |
1 files changed, 1017 insertions, 0 deletions
diff --git a/drivers/brcm/emmc/emmc_chal_sd.c b/drivers/brcm/emmc/emmc_chal_sd.c new file mode 100644 index 0000000..34d761c --- /dev/null +++ b/drivers/brcm/emmc/emmc_chal_sd.c @@ -0,0 +1,1017 @@ +/* + * Copyright (c) 2016 - 2020, Broadcom + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <assert.h> +#include <string.h> + +#include <lib/mmio.h> + +#include <platform_def.h> + +#include "bcm_emmc.h" +#include "emmc_chal_types.h" +#include "emmc_chal_sd.h" +#include "emmc_pboot_hal_memory_drv.h" + +extern void emmc_soft_reset(void); + +#define SD_VDD_WINDOW_1_6_TO_1_7 0x00000010 // 1.6 V to 1.7 Volts +#define SD_VDD_WINDOW_1_7_TO_1_8 0x00000020 // 1.7 V to 1.8 Volts +#define SD_VDD_WINDOW_1_8_TO_1_9 0x00000040 // 1.8 V to 1.9 Volts +#define SD_VDD_WINDOW_1_9_TO_2_0 0x00000080 // 1.9 V to 2.0 Volts +#define SD_VDD_WINDOW_2_0_TO_2_1 0x00000100 // 2.0 V to 2.1 Volts +#define SD_VDD_WINDOW_2_1_TO_2_2 0x00000200 // 2.1 V to 2.2 Volts +#define SD_VDD_WINDOW_2_2_TO_2_3 0x00000400 // 2.2 V to 2.3 Volts +#define SD_VDD_WINDOW_2_3_TO_2_4 0x00000800 // 2.3 V to 2.4 Volts +#define SD_VDD_WINDOW_2_4_TO_2_5 0x00001000 // 2.4 V to 2.5 Volts +#define SD_VDD_WINDOW_2_5_TO_2_6 0x00002000 // 2.5 V to 2.6 Volts +#define SD_VDD_WINDOW_2_6_TO_2_7 0x00004000 // 2.6 V to 2.7 Volts +#define SD_VDD_WINDOW_2_7_TO_2_8 0x00008000 // 2.7 V to 2.8 Volts +#define SD_VDD_WINDOW_2_8_TO_2_9 0x00010000 // 2.8 V to 2.9 Volts +#define SD_VDD_WINDOW_2_9_TO_3_0 0x00020000 // 2.9 V to 3.0 Volts +#define SD_VDD_WINDOW_3_0_TO_3_1 0x00040000 // 3.0 V to 3.1 Volts +#define SD_VDD_WINDOW_3_1_TO_3_2 0x00080000 // 3.1 V to 3.2 Volts +#define SD_VDD_WINDOW_3_2_TO_3_3 0x00100000 // 3.2 V to 3.3 Volts +#define SD_VDD_WINDOW_3_3_TO_3_4 0x00200000 // 3.3 V to 3.4 Volts +#define SD_VDD_WINDOW_3_4_TO_3_5 0x00400000 // 3.4 V to 3.5 Volts +#define SD_VDD_WINDOW_3_5_TO_3_6 0x00800000 // 3.5 V to 3.6 Volts + +#define SD_VDD_WINDOW_1_6_TO_2_6 (SD_VDD_WINDOW_1_6_TO_1_7 | \ + SD_VDD_WINDOW_1_7_TO_1_8 | \ + SD_VDD_WINDOW_1_8_TO_1_9 | \ + SD_VDD_WINDOW_1_9_TO_2_0 | \ + SD_VDD_WINDOW_2_0_TO_2_1 | \ + SD_VDD_WINDOW_2_1_TO_2_2 | \ + SD_VDD_WINDOW_2_2_TO_2_3 | \ + SD_VDD_WINDOW_2_3_TO_2_4 | \ + SD_VDD_WINDOW_2_4_TO_2_5 | \ + SD_VDD_WINDOW_2_5_TO_2_6) + +#define SD_VDD_WINDOW_2_6_TO_3_2 (SD_VDD_WINDOW_2_6_TO_2_7 | \ + SD_VDD_WINDOW_2_7_TO_2_8 | \ + SD_VDD_WINDOW_2_8_TO_2_9 | \ + SD_VDD_WINDOW_2_9_TO_3_0 | \ + SD_VDD_WINDOW_3_0_TO_3_1 | \ + SD_VDD_WINDOW_3_1_TO_3_2) + +#define SD_VDD_WINDOW_3_2_TO_3_6 (SD_VDD_WINDOW_3_2_TO_3_3 | \ + SD_VDD_WINDOW_3_3_TO_3_4 | \ + SD_VDD_WINDOW_3_4_TO_3_5 | \ + SD_VDD_WINDOW_3_5_TO_3_6) + + +static int32_t chal_sd_set_power(struct sd_dev *handle, + uint32_t voltage, uint32_t state); + +static void chal_sd_set_dma_boundary(struct sd_dev *handle, uint32_t boundary); + +static int32_t chal_sd_setup_handler(struct sd_dev *handle, + uint32_t sdBbase, uint32_t hostBase); + +/* + * Configure host controller pwr settings, + * to match voltage requirements by SD Card + */ +static int32_t chal_sd_set_power(struct sd_dev *handle, + uint32_t voltage, uint32_t state) +{ + int32_t rc, rval = SD_FAIL; + uint32_t time = 0; + + if (handle == NULL) + return SD_INVALID_HANDLE; + + mmio_clrsetbits_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_CTRL_OFFSET, + (SD4_EMMC_TOP_CTRL_SDVSELVDD1_MASK | + SD4_EMMC_TOP_CTRL_SDPWR_MASK), + (voltage << 9)); + + /* + * Long delay is required here in emulation. Without this, the initial + * commands sent to the eMMC card timeout. We don't know if this + * delay is necessary with silicon, leaving in for safety. + * It is observed that 403ms on emulation system and as per the clock + * calculations it is expected to complete with in 1ms on chip + */ + do { + rc = mmio_read_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_INTR_OFFSET); + + if ((rc & SD4_EMMC_TOP_INTR_CRDINS_MASK) == + SD4_EMMC_TOP_INTR_CRDINS_MASK) + break; + + mdelay(1); + } while (time++ < EMMC_CARD_DETECT_TIMEOUT_MS); + + if (time >= EMMC_CARD_DETECT_TIMEOUT_MS) { + ERROR("EMMC: Card insert event detection timeout\n"); + return rval; + } + + VERBOSE("EMMC: Card detection delay: %dms\n", time); + + if (state) + mmio_setbits_32(handle->ctrl.sdRegBaseAddr + SD4_EMMC_TOP_CTRL_OFFSET, + SD4_EMMC_TOP_CTRL_SDPWR_MASK); + + /* dummy write & ack to verify if the sdio is ready to send commads */ + mmio_write_32(handle->ctrl.sdRegBaseAddr + SD4_EMMC_TOP_ARG_OFFSET, 0); + mmio_write_32(handle->ctrl.sdRegBaseAddr + SD4_EMMC_TOP_CMD_OFFSET, 0); + + /* + * 63ms observed on emulation system, As per clock calculations + * it will complete < 1ms on chip. + */ + time = 0; + do { + rc = mmio_read_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_INTR_OFFSET); + + if (rc & SD4_EMMC_TOP_INTR_ERRIRQ_MASK) + break; + + if ((rc & SD4_EMMC_TOP_INTR_CMDDONE_MASK) == + SD4_EMMC_TOP_INTR_CMDDONE_MASK) + break; + + mdelay(1); + } while (time++ < EMMC_CMD_TIMEOUT_MS); + + if (time >= EMMC_CMD_TIMEOUT_MS) { + WARN("%s %d Initial dummy command timeout is happened\n", + __func__, __LINE__); + return rval; + } + + VERBOSE("EMMC: Dummy Command delay: %dms\n", time); + + return SD_OK; +} + +/* + * Configure DMA Boundaries + */ +static void chal_sd_set_dma_boundary(struct sd_dev *handle, uint32_t boundary) +{ + if (handle == NULL) + return; + + mmio_clrsetbits_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_BLOCK_OFFSET, + SD4_EMMC_TOP_BLOCK_HSBS_MASK, boundary); +} + +static int32_t chal_sd_setup_handler(struct sd_dev *handle, uint32_t sdBase, + uint32_t hostBase) +{ + if (handle == NULL) + return SD_INVALID_HANDLE; + + handle->ctrl.sdRegBaseAddr = sdBase; + handle->ctrl.hostRegBaseAddr = hostBase; + handle->ctrl.present = 0; + handle->ctrl.rca = 0; + handle->ctrl.blkGapEnable = 0; + handle->ctrl.cmdStatus = 0; + + return SD_OK; +} + +/* + * Initialize SD Host controller + */ +int32_t chal_sd_init(CHAL_HANDLE *sd_handle) +{ + uint32_t cap_val_l = 0; + uint32_t ctl_val, voltage; + uint32_t timeout_val; + struct sd_dev *handle; + uint32_t reg_val; + int32_t rval = SD_FAIL; + + if (sd_handle == NULL) + return SD_INVALID_HANDLE; + + handle = (struct sd_dev *)sd_handle; + + /* + * Set SDIO Host Controller capabilities register + */ + EMMC_TRACE("Set Host Controller Capabilities register\n"); + + reg_val = 0; + reg_val |= (1 << ICFG_SDIO0_CAP0__SLOT_TYPE_R); + reg_val |= (0 << ICFG_SDIO0_CAP0__INT_MODE_R); + reg_val |= (0 << ICFG_SDIO0_CAP0__SYS_BUS_64BIT_R); + reg_val |= (1 << ICFG_SDIO0_CAP0__VOLTAGE_1P8V_R); + reg_val |= (1 << ICFG_SDIO0_CAP0__VOLTAGE_3P0V_R); + reg_val |= (1 << ICFG_SDIO0_CAP0__VOLTAGE_3P3V_R); + reg_val |= (1 << ICFG_SDIO0_CAP0__SUSPEND_RESUME_R); + reg_val |= (1 << ICFG_SDIO0_CAP0__SDMA_R); + reg_val |= (1 << ICFG_SDIO0_CAP0__HIGH_SPEED_R); + reg_val |= (1 << ICFG_SDIO0_CAP0__ADMA2_R); + reg_val |= (1 << ICFG_SDIO0_CAP0__EXTENDED_MEDIA_R); + reg_val |= (2 << ICFG_SDIO0_CAP0__MAX_BLOCK_LEN_R); + reg_val |= (0xd0 << ICFG_SDIO0_CAP0__BASE_CLK_FREQ_R); + reg_val |= (1 << ICFG_SDIO0_CAP0__TIMEOUT_UNIT_R); + reg_val |= (0x30 << ICFG_SDIO0_CAP0__TIMEOUT_CLK_FREQ_R); + + mmio_write_32(ICFG_SDIO0_CAP0, reg_val); + + reg_val = 0; + reg_val |= (1 << ICFG_SDIO0_CAP1__SPI_BLOCK_MODE_R); + reg_val |= (1 << ICFG_SDIO0_CAP1__SPI_MODE_R); + reg_val |= (0 << ICFG_SDIO0_CAP1__CLK_MULT_R); + reg_val |= (0 << ICFG_SDIO0_CAP1__RETUNING_MODE_R); + reg_val |= (1 << ICFG_SDIO0_CAP1__TUNE_SDR50_R); + reg_val |= (1 << ICFG_SDIO0_CAP1__TIME_RETUNE_R); + reg_val |= (1 << ICFG_SDIO0_CAP1__DRIVER_D_R); + reg_val |= (1 << ICFG_SDIO0_CAP1__DRIVER_C_R); + reg_val |= (1 << ICFG_SDIO0_CAP1__DRIVER_A_R); + reg_val |= (1 << ICFG_SDIO0_CAP1__DDR50_R); + reg_val |= (1 << ICFG_SDIO0_CAP1__SDR104_R); + reg_val |= (1 << ICFG_SDIO0_CAP1__SDR50_R); + + mmio_write_32(ICFG_SDIO0_CAP1, reg_val); + + /* Reset the SDIO controller */ + chal_sd_stop(); + + /* Turn on SD clock */ + chal_sd_set_clock(sd_handle, + chal_sd_freq_2_div_ctrl_setting(INIT_CLK_FREQ), 1); + + /* program data time out value to the max */ + timeout_val = SD_HOST_CORE_TIMEOUT; + + ctl_val = mmio_read_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_CTRL1_OFFSET); + ctl_val |= ((timeout_val & 0xf) << SD4_EMMC_TOP_CTRL1_DTCNT_SHIFT); + + mmio_write_32(handle->ctrl.sdRegBaseAddr + SD4_EMMC_TOP_CTRL1_OFFSET, + ctl_val); + + /* enable all interrupt status */ + mmio_write_32(handle->ctrl.sdRegBaseAddr + SD4_EMMC_TOP_INTREN1_OFFSET, + 0); + mmio_write_32(handle->ctrl.sdRegBaseAddr + SD4_EMMC_TOP_INTREN2_OFFSET, + 0); + + SD_US_DELAY(100); + + mmio_write_32(handle->ctrl.sdRegBaseAddr + SD4_EMMC_TOP_INTREN1_OFFSET, + SD_NOR_INTERRUPTS | SD_ERR_INTERRUPTS); + mmio_write_32(handle->ctrl.sdRegBaseAddr + SD4_EMMC_TOP_INTREN2_OFFSET, + SD_NOR_INTERRUPTS | SD_ERR_INTERRUPTS); + + /* Select SD bus voltage */ + cap_val_l = mmio_read_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_CAPABILITIES1_OFFSET); + handle->cfg.voltage = 0; + voltage = 0x7; + + if (cap_val_l & SD4_EMMC_TOP_CAPABILITIES1_V33_MASK) { + handle->cfg.voltage |= SD_VDD_WINDOW_3_3_TO_3_4; + voltage = 0x7; + } else if (cap_val_l & SD4_EMMC_TOP_CAPABILITIES1_V3_MASK) { + handle->cfg.voltage |= SD_VDD_WINDOW_3_0_TO_3_1; + voltage = 0x6; + } else if (cap_val_l & SD4_EMMC_TOP_CAPABILITIES1_V18_MASK) { + handle->cfg.voltage |= SD_VDD_WINDOW_1_8_TO_1_9; + voltage = 0x5; + } + + rval = chal_sd_set_power(handle, voltage, SD4_EMMC_TOP_CTRL_SDPWR_MASK); + + ctl_val = mmio_read_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_HCVERSIRQ_OFFSET); + handle->ctrl.version = ((ctl_val >> 16) & 0xFF); + + return rval; +} + +void chal_sd_set_speed(CHAL_HANDLE *sd_handle, uint32_t speed) +{ + struct sd_dev *handle; + + if (sd_handle == NULL) + return; + + handle = (struct sd_dev *) sd_handle; + + if (speed) { + EMMC_TRACE("enable HighSpeed\n"); + mmio_setbits_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_CTRL_OFFSET, + SD4_EMMC_TOP_CTRL_HSEN_MASK); + } else { + EMMC_TRACE("disable HighSpeed\n"); + mmio_clrbits_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_CTRL_OFFSET, + SD4_EMMC_TOP_CTRL_HSEN_MASK); + } +} + +int32_t chal_sd_stop(void) +{ + uintptr_t idm_rst_ctrl_addr = EMMC_IDM_RESET_CTRL_ADDR; + + /* Configure IO pins */ + emmc_soft_reset(); + + /* Reset the SDIO controller */ + mmio_write_32(idm_rst_ctrl_addr, 1); + SD_US_DELAY(100); + mmio_write_32(idm_rst_ctrl_addr, 0); + SD_US_DELAY(100); + + return SD_OK; +} + +/* + * Check if host supports specified capability + * returns -ve val on error, 0 if capability not supported else 1. + */ +int32_t chal_sd_check_cap(CHAL_HANDLE *sd_handle, uint32_t caps) +{ + struct sd_dev *handle; + + if (sd_handle == NULL) + return SD_INVALID_HANDLE; + + handle = (struct sd_dev *) sd_handle; + + if (caps & mmio_read_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_CAPABILITIES1_OFFSET)) + return 1; + else + return 0; +} + +int32_t chal_sd_start(CHAL_HANDLE *sd_handle, + uint32_t mode, uint32_t sd_base, uint32_t host_base) +{ + + struct sd_dev *handle; + int32_t rval = SD_FAIL; + + if (sd_handle == NULL) + return SD_INVALID_HANDLE; + + handle = (struct sd_dev *) sd_handle; + + handle->cfg.mode = SD_PIO_MODE; /* set to PIO mode first for init */ + handle->cfg.dma = SD_DMA_OFF; + + chal_sd_setup_handler(handle, sd_base, host_base); + + /* init and start hw */ + rval = chal_sd_init(sd_handle); + if (rval != SD_OK) + return rval; + + chal_sd_clear_pending_irq(sd_handle); + + handle->ctrl.eventList = 0; + handle->cfg.mode = mode; + + return SD_OK; +} + +/* + * Function to check 8bits of err generated from auto CMD12 + */ +int32_t chal_sd_get_atuo12_error(CHAL_HANDLE *sd_handle) +{ + struct sd_dev *handle; + + if (sd_handle == NULL) + return SD_INVALID_HANDLE; + + handle = (struct sd_dev *) sd_handle; + + return (mmio_read_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_ERRSTAT_OFFSET) & 0xFF); +} + +/* + * Read present state register + */ +uint32_t chal_sd_get_present_status(CHAL_HANDLE *sd_handle) +{ + struct sd_dev *handle; + + if (sd_handle == NULL) + return SD_INVALID_HANDLE; + + handle = (struct sd_dev *) sd_handle; + + return mmio_read_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_PSTATE_OFFSET); +} + +/* + * Set SD bus width + */ +int32_t chal_sd_config_bus_width(CHAL_HANDLE *sd_handle, int32_t width) +{ + uint32_t ctl_val; + struct sd_dev *handle; + + if (sd_handle == NULL) + return SD_INVALID_HANDLE; + + handle = (struct sd_dev *)sd_handle; + + ctl_val = mmio_read_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_CTRL_OFFSET); + + switch (width) { +#ifdef DRIVER_EMMC_ENABLE_DATA_WIDTH_8BIT + case SD_BUS_DATA_WIDTH_8BIT: + ctl_val &= ~SD_BUS_DATA_WIDTH_4BIT; + ctl_val |= SD_BUS_DATA_WIDTH_8BIT; + break; +#endif + case SD_BUS_DATA_WIDTH_4BIT: + ctl_val &= ~SD_BUS_DATA_WIDTH_8BIT; + ctl_val |= SD_BUS_DATA_WIDTH_4BIT; + break; + case SD_BUS_DATA_WIDTH_1BIT: + ctl_val &= ~(SD_BUS_DATA_WIDTH_4BIT | SD_BUS_DATA_WIDTH_8BIT); + break; + default: + return SD_INV_DATA_WIDTH; + }; + + mmio_write_32(handle->ctrl.sdRegBaseAddr + SD4_EMMC_TOP_CTRL_OFFSET, + ctl_val); + + return SD_OK; +} + +/* + * Function to enable or disable DMA control. + */ +int32_t chal_sd_set_dma(CHAL_HANDLE *sd_handle, uint32_t mode) +{ + uint32_t val; + struct sd_dev *handle; + int32_t rc; + + if (sd_handle == NULL) + return SD_INVALID_HANDLE; + + handle = (struct sd_dev *)sd_handle; + + if (mode) { + rc = chal_sd_check_cap(sd_handle, + SD4_EMMC_TOP_CAPABILITIES1_SDMA_MASK | + SD4_EMMC_TOP_CAPABILITIES1_ADMA2_MASK); + if (rc < 0) + return rc; + + if (rc) { + + handle->cfg.dma = mode; + val = mmio_read_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_CTRL_OFFSET); + val &= ~(SD4_EMMC_TOP_CTRL_DMASEL_MASK); + val |= handle->cfg.dma - 1; + mmio_write_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_CTRL_OFFSET, val); + return SD_OK; + } + } + handle->cfg.dma = 0; + + return SD_FAIL; +} + +/* + * Get current DMA address. + * Called only when there is no data transaction activity. + */ +uintptr_t chal_sd_get_dma_addr(CHAL_HANDLE *sd_handle) +{ + struct sd_dev *handle; + + if (sd_handle == NULL) + return SD_INVALID_HANDLE; + + handle = (struct sd_dev *) sd_handle; + + if (handle->cfg.dma == SD_DMA_OFF) + return 0; + + return (uintptr_t)mmio_read_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_SYSADDR_OFFSET); +} + +int32_t chal_sd_send_cmd(CHAL_HANDLE *sd_handle, uint32_t cmd_idx, + uint32_t argument, uint32_t options) +{ + uint32_t cmd_mode_reg = 0; + struct sd_dev *handle; + + if (sd_handle == NULL) + return SD_INVALID_HANDLE; + + handle = (struct sd_dev *) sd_handle; + + EMMC_TRACE("%s %d cmd:%d argReg:%x options:%x\n", + __func__, __LINE__, cmd_idx, argument, options); + + /* Configure the value for command and mode registers */ + cmd_mode_reg = (cmd_idx << 24) | options; + + /* + * 1. Write block size reg & block count reg, + * this is done in the tx or rx setup + */ + mmio_write_32(handle->ctrl.sdRegBaseAddr + SD4_EMMC_TOP_BLOCK_OFFSET, + handle->ctrl.blkReg); + + /* 2. Write argument reg */ + mmio_write_32(handle->ctrl.sdRegBaseAddr + SD4_EMMC_TOP_ARG_OFFSET, + argument); + handle->ctrl.argReg = argument; + + /* + * 3. Write transfer mode reg & command reg, check the DMA bit which is + * set before this function call if it is selected. + */ + if (cmd_idx == 24 || cmd_idx == 25 || cmd_idx == 18 || cmd_idx == 17 || + cmd_idx == 42 || cmd_idx == 51 || cmd_idx == 53) + cmd_mode_reg |= ((handle->cfg.dma) ? 1 : 0); + + mmio_write_32(handle->ctrl.sdRegBaseAddr + SD4_EMMC_TOP_CMD_OFFSET, + cmd_mode_reg); + + handle->ctrl.cmdIndex = cmd_idx; + + return SD_OK; +} + +int32_t chal_sd_set_dma_addr(CHAL_HANDLE *sd_handle, uintptr_t address) +{ + struct sd_dev *handle; + + if (sd_handle == NULL) + return SD_INVALID_HANDLE; + + handle = (struct sd_dev *) sd_handle; + + if (handle->cfg.dma == SD_DMA_OFF) + return SD_FAIL; + + mmio_write_32(handle->ctrl.sdRegBaseAddr + SD4_EMMC_TOP_SYSADDR_OFFSET, + address); + return SD_OK; +} + +uint32_t chal_sd_freq_2_div_ctrl_setting(uint32_t desired_freq) +{ + /* + * Divider control setting represents 1/2 of the actual divider value. + * + * DesiredFreq = BaseClockFreq / (2 * div_ctrl_setting) + * + * ==> div_ctrl_setting = BaseClockFreq / (2 * DesiredFreq) + */ + uint32_t div_ctrl_setting; + uint32_t actual_freq; + + assert(desired_freq != 0); + + /* Special case, 0 = divider of 1. */ + if (desired_freq >= BASE_CLK_FREQ) + return 0; + + /* Normal case, desired_freq < BASE_CLK_FREQ */ + div_ctrl_setting = BASE_CLK_FREQ / (2 * desired_freq); + + actual_freq = BASE_CLK_FREQ / (2 * div_ctrl_setting); + + if (actual_freq > desired_freq) { + /* + * Division does not result in exact freqency match. + * Make sure resulting frequency does not exceed requested freq. + */ + div_ctrl_setting++; + } + + return div_ctrl_setting; +} + +int32_t chal_sd_set_clock(CHAL_HANDLE *sd_handle, uint32_t div_ctrl_setting, + uint32_t on) +{ + uint32_t value; + struct sd_dev *handle; + uint32_t time; + uint32_t clk_sel_high_byte = 0xFF & (div_ctrl_setting >> 8); + uint32_t clk_sel_low_byte = 0xFF & div_ctrl_setting; + + if (sd_handle == NULL) + return SD_INVALID_HANDLE; + + EMMC_TRACE("set_clock(div_ctrl_setting=%d,on=%d)\n", + div_ctrl_setting, on); + + handle = (struct sd_dev *) sd_handle; + + /* Read control register content. */ + value = mmio_read_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_CTRL1_OFFSET); + + /* Disable Clock */ + value &= ~(SD4_EMMC_TOP_CTRL1_SDCLKEN_MASK); + + mmio_write_32(handle->ctrl.sdRegBaseAddr + SD4_EMMC_TOP_CTRL1_OFFSET, + value); + + /* Clear bits of interest. */ + value &= ~(SD4_EMMC_TOP_CTRL1_SDCLKSEL_MASK | + SD4_EMMC_TOP_CTRL1_SDCLKSEL_UP_MASK); + + /* Set bits of interest to new value. */ + value |= (SD4_EMMC_TOP_CTRL1_SDCLKSEL_MASK & + (clk_sel_low_byte << SD4_EMMC_TOP_CTRL1_SDCLKSEL_SHIFT)); + value |= (SD4_EMMC_TOP_CTRL1_SDCLKSEL_UP_MASK & + (clk_sel_high_byte << SD4_EMMC_TOP_CTRL1_SDCLKSEL_UP_SHIFT)); + value |= SD4_EMMC_TOP_CTRL1_ICLKEN_MASK; + + /* Write updated value back to control register. */ + mmio_write_32(handle->ctrl.sdRegBaseAddr + SD4_EMMC_TOP_CTRL1_OFFSET, + value); + + time = 0; + do { + value = mmio_read_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_CTRL1_OFFSET); + + if ((value & SD4_EMMC_TOP_CTRL1_ICLKSTB_MASK) == + SD4_EMMC_TOP_CTRL1_ICLKSTB_MASK) + break; + + mdelay(1); + } while (time++ < EMMC_CLOCK_SETTING_TIMEOUT_MS); + + if (time >= EMMC_CLOCK_SETTING_TIMEOUT_MS) + WARN("%s %d clock settings timeout happenedi (%dms)\n", + __func__, __LINE__, time); + + VERBOSE("EMMC: clock settings delay: %dms\n", time); + + value = mmio_read_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_CTRL1_OFFSET); + + if (on) + value |= SD4_EMMC_TOP_CTRL1_SDCLKEN_MASK; + + mmio_write_32(handle->ctrl.sdRegBaseAddr + SD4_EMMC_TOP_CTRL1_OFFSET, + value); + + return SD_OK; +} + +/* + * function to setup DMA buffer and data length, calculates block + * size and the number of blocks to be transferred and return + * the DMA buffer address. + */ +int32_t chal_sd_setup_xfer(CHAL_HANDLE *sd_handle, + uint8_t *data, uint32_t length, int32_t dir) +{ + uint32_t blocks = 0; + struct sd_dev *handle; + + if (sd_handle == NULL) + return SD_INVALID_HANDLE; + + handle = (struct sd_dev *) sd_handle; + + if (length <= handle->cfg.blockSize) { + handle->ctrl.blkReg = length | handle->cfg.dmaBoundary; + } else { + blocks = length / handle->cfg.blockSize; + handle->ctrl.blkReg = (blocks << 16) | handle->cfg.blockSize | + handle->cfg.dmaBoundary; + } + + if (handle->cfg.dma != SD_DMA_OFF) { + /* For DMA target address setting, physical address should be used */ + mmio_write_32(handle->ctrl.sdRegBaseAddr + SD4_EMMC_TOP_SYSADDR_OFFSET, + (uintptr_t)data); + } + + return SD_OK; +} + +#ifdef INCLUDE_EMMC_DRIVER_WRITE_CODE +/* + * function to write one block data directly to the + * host controller's FIFO which is 1K uint8_t or + * 2K uint8_t in size. + * It is used in Non-DMA mode for data transmission. + */ +int32_t chal_sd_write_buffer(CHAL_HANDLE *sd_handle, uint32_t length, + uint8_t *data) +{ + uint32_t i, leftOver = 0, blockSize, size, value = 0; + struct sd_dev *handle; + + if (sd_handle == NULL) + return SD_INVALID_HANDLE; + + handle = (struct sd_dev *) sd_handle; + + blockSize = handle->cfg.blockSize; + + if (length == 0) + return SD_OK; + + /* PIO mode, push into fifo word by word */ + if (length >= blockSize) { + size = blockSize; + } else { + size = ((length >> 2) << 2); + leftOver = length % 4; + } + + for (i = 0; i < size; i += 4) { + value = *(uint32_t *)(data + i); + mmio_write_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_BUFDAT_OFFSET, value); + } +/* + * BUG ALERT: + * This implementation has TWO issues that must be addressed before you + * can safely INCLUDE_EMMC_DRIVER_WRITE_CODE. + * + * (1) For the last leftOver bytes, driver writes full word, which means + * some of the eMMC content (i.e. "4 - leftOver" will be erroneously + * overwritten). + * (2) eMMC is a block device. What happens when less than a full block of + * data is submitted??? + */ + if (leftOver > 0) { + value = ((*(uint32_t *)(data + i)) << (4 - leftOver)); + mmio_write_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_BUFDAT_OFFSET, value); + } + + return SD_OK; +} +#endif /* INCLUDE_EMMC_DRIVER_WRITE_CODE */ + +/* + * Function to read maximal one block data directly + * from the data port of the host controller (FIFO). It is used + * in Non-DMA mode for data transmission. + */ +int32_t chal_sd_read_buffer(CHAL_HANDLE *sd_handle, uint32_t length, + uint8_t *data) +{ + uint32_t i, size, leftOver, blockSize, value; + struct sd_dev *handle; + + if (sd_handle == NULL) + return SD_INVALID_HANDLE; + + handle = (struct sd_dev *)sd_handle; + + value = 0; + + blockSize = handle->cfg.blockSize; + + /* PIO mode, extract fifo word by word */ + if (length >= blockSize) { + size = blockSize; + leftOver = 0; + } else { + leftOver = length % 4; + size = ((length >> 2) << 2); + } + + for (i = 0; i < size; i += 4) { + value = + mmio_read_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_BUFDAT_OFFSET); + memcpy((void *)(data + i), &value, sizeof(uint32_t)); + } + + if (leftOver > 0) { + value = mmio_read_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_BUFDAT_OFFSET); + + /* + * Copy remaining non-full word bytes. + * (We run ARM as Little Endian) + */ + uint8_t j = 0; + + for (j = 0; j < leftOver; j++) { + data[i + j] = (value >> (j * 8)) & 0xFF; + } + } + + return SD_OK; +} + +/* + * Resets both DAT or CMD line. + */ +int32_t chal_sd_reset_line(CHAL_HANDLE *sd_handle, uint32_t line) +{ + uint32_t control, flag; + struct sd_dev *handle; + + if (sd_handle == NULL) + return SD_INVALID_HANDLE; + + handle = (struct sd_dev *) sd_handle; + + flag = SD4_EMMC_TOP_CTRL1_CMDRST_MASK | SD4_EMMC_TOP_CTRL1_DATRST_MASK; + + if (flag != (line | flag)) + return SD_FAIL; + + control = mmio_read_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_CTRL1_OFFSET); + control |= line; + mmio_write_32(handle->ctrl.sdRegBaseAddr + SD4_EMMC_TOP_CTRL1_OFFSET, + control); + + /* reset CMD and DATA line should always work, no need to timed out */ + do { + control = mmio_read_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_CTRL1_OFFSET); + } while (control & line); + + return SD_OK; +} + +/* + * Function to be called once a SD command is done to read + * back it's response data. + */ +int32_t chal_sd_get_response(CHAL_HANDLE *sd_handle, uint32_t *resp) +{ + struct sd_dev *handle; + + if (sd_handle == NULL) + return SD_INVALID_HANDLE; + + handle = (struct sd_dev *) sd_handle; + resp[0] = mmio_read_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_RESP0_OFFSET); + resp[1] = mmio_read_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_RESP2_OFFSET); + resp[2] = mmio_read_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_RESP4_OFFSET); + resp[3] = mmio_read_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_RESP6_OFFSET); + + return SD_OK; +} + +/* + * The function is called to clean all the pending interrupts. + */ +int32_t chal_sd_clear_pending_irq(CHAL_HANDLE *sd_handle) +{ + uint32_t status = SD_OK; + struct sd_dev *handle; + + if (sd_handle == NULL) + return SD_INVALID_HANDLE; + + handle = (struct sd_dev *)sd_handle; + + /* Make sure clean all interrupts */ + do { + mmio_write_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_INTR_OFFSET, 0xFFFFFFFF); + SD_US_DELAY(10); + } while (mmio_read_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_INTR_OFFSET)); + + return status; +} + +/* + * The function returns interrupt status register value. + */ +int32_t chal_sd_get_irq_status(CHAL_HANDLE *sd_handle) +{ + struct sd_dev *handle; + + if (sd_handle == NULL) + return SD_INVALID_HANDLE; + + handle = (struct sd_dev *) sd_handle; + + return (mmio_read_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_INTR_OFFSET)); +} + +/* + * The function clears interrupt(s) specified in the mask. + */ +int32_t chal_sd_clear_irq(CHAL_HANDLE *sd_handle, uint32_t mask) +{ + struct sd_dev *handle; + + if (sd_handle == NULL) + return SD_INVALID_HANDLE; + + handle = (struct sd_dev *) sd_handle; + + /* Make sure clean masked interrupts */ + do { + mmio_write_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_INTR_OFFSET, mask); + SD_US_DELAY(10); + } while (mask & + mmio_read_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_INTR_OFFSET)); + + return SD_OK; +} + +/* + * Description: The function configures the SD host controller. + */ +int32_t chal_sd_config(CHAL_HANDLE *sd_handle, uint32_t speed, uint32_t retry, + uint32_t boundary, uint32_t blkSize, uint32_t dma) +{ + struct sd_dev *handle; + + if (sd_handle == NULL) + return SD_INVALID_HANDLE; + + handle = (struct sd_dev *) sd_handle; + + handle->cfg.speedMode = speed; + handle->cfg.retryLimit = retry; + handle->cfg.dmaBoundary = boundary; + handle->cfg.blockSize = blkSize; + + chal_sd_set_dma(sd_handle, dma); + SD_US_DELAY(100); + chal_sd_set_dma_boundary(handle, boundary); + SD_US_DELAY(100); + + chal_sd_set_speed(sd_handle, speed); + + SD_US_DELAY(100); + return SD_OK; +} + +/* + * Cleans up HC FIFO. + */ +void chal_sd_dump_fifo(CHAL_HANDLE *sd_handle) +{ + struct sd_dev *handle; + + if (sd_handle == NULL) + return; + + handle = (struct sd_dev *)sd_handle; + + /* in case there still data in the host buffer */ + while (mmio_read_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_PSTATE_OFFSET) & 0x800) { + mmio_read_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_BUFDAT_OFFSET); + }; +} + +/* + * Enable or disable a SD interrupt signal. + */ +void chal_sd_set_irq_signal(CHAL_HANDLE *sd_handle, uint32_t mask, + uint32_t state) +{ + struct sd_dev *handle; + + if (sd_handle == NULL) + return; + + handle = (struct sd_dev *)sd_handle; + + if (state) + mmio_setbits_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_INTREN2_OFFSET, mask); + else + mmio_clrbits_32(handle->ctrl.sdRegBaseAddr + + SD4_EMMC_TOP_INTREN2_OFFSET, mask); +} |