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hekate/bdk/storage/sdmmc_driver.c

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/*
* Copyright (c) 2018 naehrwert
* Copyright (c) 2018-2022 CTCaer
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include <storage/mmc.h>
#include <storage/sdmmc.h>
#include <gfx_utils.h>
#include <power/max7762x.h>
#include <soc/bpmp.h>
#include <soc/clock.h>
#include <soc/gpio.h>
#include <soc/hw_init.h>
#include <soc/pinmux.h>
#include <soc/pmc.h>
#include <soc/timer.h>
#include <soc/t210.h>
//#define DPRINTF(...) gfx_printf(__VA_ARGS__)
//#define ERROR_EXTRA_PRINTING
#define DPRINTF(...)
#ifdef BDK_SDMMC_OC_AND_EXTRA_PRINT
#define ERROR_EXTRA_PRINTING
#define SDMMC_EMMC_OC
#endif
/*! SCMMC controller base addresses. */
static const u32 _sdmmc_bases[4] = {
0x700B0000,
0x700B0200,
0x700B0400,
0x700B0600,
};
int sdmmc_get_io_power(sdmmc_t *sdmmc)
{
u32 p = sdmmc->regs->pwrcon;
if (!(p & SDHCI_POWER_ON))
return SDMMC_POWER_OFF;
if (p & SDHCI_POWER_180)
return SDMMC_POWER_1_8;
if (p & SDHCI_POWER_330)
return SDMMC_POWER_3_3;
return -1;
}
static int _sdmmc_set_io_power(sdmmc_t *sdmmc, u32 power)
{
switch (power)
{
case SDMMC_POWER_OFF:
sdmmc->regs->pwrcon &= ~SDHCI_POWER_ON;
break;
case SDMMC_POWER_1_8:
sdmmc->regs->pwrcon = SDHCI_POWER_180;
break;
case SDMMC_POWER_3_3:
sdmmc->regs->pwrcon = SDHCI_POWER_330;
break;
default:
return 0;
}
if (power != SDMMC_POWER_OFF)
sdmmc->regs->pwrcon |= SDHCI_POWER_ON;
return 1;
}
u32 sdmmc_get_bus_width(sdmmc_t *sdmmc)
{
u32 h = sdmmc->regs->hostctl;
if (h & SDHCI_CTRL_8BITBUS) // eMMC only (or UHS-II).
return SDMMC_BUS_WIDTH_8;
if (h & SDHCI_CTRL_4BITBUS) // SD only.
return SDMMC_BUS_WIDTH_4;
return SDMMC_BUS_WIDTH_1;
}
void sdmmc_set_bus_width(sdmmc_t *sdmmc, u32 bus_width)
{
u32 host_control = sdmmc->regs->hostctl & ~(SDHCI_CTRL_4BITBUS | SDHCI_CTRL_8BITBUS);
if (bus_width == SDMMC_BUS_WIDTH_1)
sdmmc->regs->hostctl = host_control;
else if (bus_width == SDMMC_BUS_WIDTH_4)
sdmmc->regs->hostctl = host_control | SDHCI_CTRL_4BITBUS; // SD only.
else if (bus_width == SDMMC_BUS_WIDTH_8)
sdmmc->regs->hostctl = host_control | SDHCI_CTRL_8BITBUS; // eMMC only (or UHS-II).
}
void sdmmc_save_tap_value(sdmmc_t *sdmmc)
{
sdmmc->venclkctl_tap = sdmmc->regs->venclkctl >> 16;
sdmmc->venclkctl_set = 1;
}
static int _sdmmc_config_tap_val(sdmmc_t *sdmmc, u32 type)
{
const u32 dqs_trim_val = 0x28;
const u32 tap_values_t210[] = { 4, 0, 3, 0 };
u32 tap_val = 0;
if (type == SDHCI_TIMING_MMC_HS400)
sdmmc->regs->vencapover = (sdmmc->regs->vencapover & 0xFFFFC0FF) | (dqs_trim_val << 8);
sdmmc->regs->ventunctl0 &= ~TEGRA_MMC_VNDR_TUN_CTRL0_TAP_VAL_UPDATED_BY_HW;
if (type == SDHCI_TIMING_MMC_HS400)
{
if (!sdmmc->venclkctl_set)
return 0;
tap_val = sdmmc->venclkctl_tap;
}
else
tap_val = sdmmc->t210b01 ? 11 : tap_values_t210[sdmmc->id];
sdmmc->regs->venclkctl = (sdmmc->regs->venclkctl & 0xFF00FFFF) | (tap_val << 16);
return 1;
}
static void _sdmmc_commit_changes(sdmmc_t *sdmmc)
{
(void)sdmmc->regs->clkcon;
}
static void _sdmmc_pad_config_fallback(sdmmc_t *sdmmc, u32 power)
{
_sdmmc_commit_changes(sdmmc);
switch (sdmmc->id)
{
case SDMMC_1: // 33 Ohm 2X Driver.
if (power == SDMMC_POWER_OFF)
break;
u32 sdmmc1_pad_cfg = APB_MISC(APB_MISC_GP_SDMMC1_PAD_CFGPADCTRL) & 0xF8080FFF;
if (sdmmc->t210b01)
sdmmc1_pad_cfg |= (0x808 << 12); // Up: 8, Dn: 8. For 33 ohm.
else if (power == SDMMC_POWER_1_8)
sdmmc1_pad_cfg |= (0xB0F << 12); // Up: 11, Dn: 15. For 33 ohm.
else if (power == SDMMC_POWER_3_3)
sdmmc1_pad_cfg |= (0xC0C << 12); // Up: 12, Dn: 12. For 33 ohm.
APB_MISC(APB_MISC_GP_SDMMC1_PAD_CFGPADCTRL) = sdmmc1_pad_cfg;
(void)APB_MISC(APB_MISC_GP_SDMMC1_PAD_CFGPADCTRL); // Commit write.
break;
case SDMMC_2:
if (sdmmc->t210b01)
APB_MISC(APB_MISC_GP_EMMC2_PAD_CFGPADCTRL) = (APB_MISC(APB_MISC_GP_EMMC2_PAD_CFGPADCTRL) & 0xF8080FFF) | 0xA0A000;
else
APB_MISC(APB_MISC_GP_EMMC2_PAD_CFGPADCTRL) = (APB_MISC(APB_MISC_GP_EMMC2_PAD_CFGPADCTRL) & 0xFFFFC003) | 0x1040; // PU:16, PD:16.
(void)APB_MISC(APB_MISC_GP_EMMC2_PAD_CFGPADCTRL);
break;
case SDMMC_4: // 50 Ohm 2X Driver. PU:16, PD:16, B01: PU:10, PD:10.
APB_MISC(APB_MISC_GP_EMMC4_PAD_CFGPADCTRL) =
(APB_MISC(APB_MISC_GP_EMMC4_PAD_CFGPADCTRL) & 0xFFFFC003) | (sdmmc->t210b01 ? 0xA28 : 0x1040);
(void)APB_MISC(APB_MISC_GP_EMMC4_PAD_CFGPADCTRL); // Commit write.
break;
}
}
static void _sdmmc_autocal_execute(sdmmc_t *sdmmc, u32 power)
{
bool should_enable_sd_clock = false;
if (sdmmc->regs->clkcon & SDHCI_CLOCK_CARD_EN)
{
should_enable_sd_clock = true;
sdmmc->regs->clkcon &= ~SDHCI_CLOCK_CARD_EN;
}
// Enable E_INPUT power.
if (!(sdmmc->regs->sdmemcmppadctl & TEGRA_MMC_SDMEMCOMPPADCTRL_PAD_E_INPUT_PWRD))
{
sdmmc->regs->sdmemcmppadctl |= TEGRA_MMC_SDMEMCOMPPADCTRL_PAD_E_INPUT_PWRD;
_sdmmc_commit_changes(sdmmc);
usleep(1);
}
// Enable auto calibration and start auto configuration.
sdmmc->regs->autocalcfg |= TEGRA_MMC_AUTOCALCFG_AUTO_CAL_ENABLE | TEGRA_MMC_AUTOCALCFG_AUTO_CAL_START;
_sdmmc_commit_changes(sdmmc);
usleep(2);
u32 timeout = get_tmr_ms() + 10;
while (sdmmc->regs->autocalsts & TEGRA_MMC_AUTOCALSTS_AUTO_CAL_ACTIVE)
{
if (get_tmr_ms() > timeout)
{
timeout = 0; // Set timeout to 0 if we timed out.
break;
}
}
#ifdef ERROR_EXTRA_PRINTING
// Check if Comp pad is open or short to ground.
// SDMMC1: CZ pads - T210/T210B01: 7-bit/5-bit. SDMMC2/4: LV_CZ pads - 5-bit.
u8 code_mask = (sdmmc->t210b01 || sdmmc->id != SDMMC_1) ? 0x1F : 0x7F;
u8 autocal_pu_status = sdmmc->regs->autocalsts & code_mask;
if (!autocal_pu_status)
EPRINTF("SDMMC: Comp Pad short to gnd!");
else if (autocal_pu_status == code_mask)
EPRINTF("SDMMC: Comp Pad open!");
#endif
// In case auto calibration fails, we load suggested standard values.
if (!timeout)
{
_sdmmc_pad_config_fallback(sdmmc, power);
sdmmc->regs->autocalcfg &= ~TEGRA_MMC_AUTOCALCFG_AUTO_CAL_ENABLE;
}
// Disable E_INPUT to conserve power.
sdmmc->regs->sdmemcmppadctl &= ~TEGRA_MMC_SDMEMCOMPPADCTRL_PAD_E_INPUT_PWRD;
if(should_enable_sd_clock)
sdmmc->regs->clkcon |= SDHCI_CLOCK_CARD_EN;
}
#ifdef SDMMC_EMMC_OC
static int _sdmmc_dll_cal_execute(sdmmc_t *sdmmc, bool overclock)
#else
static int _sdmmc_dll_cal_execute(sdmmc_t *sdmmc)
#endif
{
int result = 1, should_disable_sd_clock = 0;
if (!(sdmmc->regs->clkcon & SDHCI_CLOCK_CARD_EN))
{
should_disable_sd_clock = 1;
sdmmc->regs->clkcon |= SDHCI_CLOCK_CARD_EN;
}
#ifdef SDMMC_EMMC_OC
// Add -4 TX_DLY_CODE_OFFSET if HS533.
if (sdmmc->id == SDMMC_4 && overclock)
sdmmc->regs->vendllcalcfg = sdmmc->regs->vendllcalcfg &= 0xFFFFC07F | (0x7C << 7);
#endif
sdmmc->regs->vendllcalcfg |= TEGRA_MMC_DLLCAL_CFG_EN_CALIBRATE;
_sdmmc_commit_changes(sdmmc);
u32 timeout = get_tmr_ms() + 5;
while (sdmmc->regs->vendllcalcfg & TEGRA_MMC_DLLCAL_CFG_EN_CALIBRATE)
{
if (get_tmr_ms() > timeout)
{
result = 0;
goto out;
}
}
timeout = get_tmr_ms() + 10;
while (sdmmc->regs->vendllcalcfgsts & TEGRA_MMC_DLLCAL_CFG_STATUS_DLL_ACTIVE)
{
if (get_tmr_ms() > timeout)
{
result = 0;
goto out;
}
}
out:;
if (should_disable_sd_clock)
sdmmc->regs->clkcon &= ~SDHCI_CLOCK_CARD_EN;
return result;
}
static void _sdmmc_reset(sdmmc_t *sdmmc)
{
sdmmc->regs->swrst |= SDHCI_RESET_CMD | SDHCI_RESET_DATA;
_sdmmc_commit_changes(sdmmc);
u32 timeout = get_tmr_ms() + 2000;
while ((sdmmc->regs->swrst & (SDHCI_RESET_CMD | SDHCI_RESET_DATA)) && get_tmr_ms() < timeout)
;
}
static void _sdmmc_reset_all(sdmmc_t *sdmmc)
{
sdmmc->regs->swrst |= SDHCI_RESET_ALL;
_sdmmc_commit_changes(sdmmc);
u32 timeout = get_tmr_ms() + 2000;//100ms
while ((sdmmc->regs->swrst & SDHCI_RESET_ALL) && get_tmr_ms() < timeout)
;
}
int sdmmc_setup_clock(sdmmc_t *sdmmc, u32 type)
{
// Disable the SD clock if it was enabled, and reenable it later.
bool should_enable_sd_clock = false;
if (sdmmc->regs->clkcon & SDHCI_CLOCK_CARD_EN)
{
should_enable_sd_clock = true;
sdmmc->regs->clkcon &= ~SDHCI_CLOCK_CARD_EN;
}
_sdmmc_config_tap_val(sdmmc, type);
_sdmmc_reset(sdmmc);
switch (type)
{
case SDHCI_TIMING_MMC_ID:
case SDHCI_TIMING_MMC_LS26:
case SDHCI_TIMING_SD_ID:
case SDHCI_TIMING_SD_DS12:
sdmmc->regs->hostctl &= ~SDHCI_CTRL_HISPD;
sdmmc->regs->hostctl2 &= ~SDHCI_CTRL_VDD_180;
break;
case SDHCI_TIMING_MMC_HS52:
case SDHCI_TIMING_SD_HS25:
sdmmc->regs->hostctl |= SDHCI_CTRL_HISPD; // SD only?
sdmmc->regs->hostctl2 &= ~SDHCI_CTRL_VDD_180;
break;
case SDHCI_TIMING_MMC_HS200:
case SDHCI_TIMING_UHS_SDR50: // T210 Errata for SDR50, the host must be set to SDR104.
case SDHCI_TIMING_UHS_SDR104:
case SDHCI_TIMING_UHS_SDR82:
case SDHCI_TIMING_UHS_DDR50:
case SDHCI_TIMING_MMC_HS102:
sdmmc->regs->hostctl2 = (sdmmc->regs->hostctl2 & (~SDHCI_CTRL_UHS_MASK)) | UHS_SDR104_BUS_SPEED;
sdmmc->regs->hostctl2 |= SDHCI_CTRL_VDD_180;
break;
case SDHCI_TIMING_MMC_HS400:
// Non standard.
sdmmc->regs->hostctl2 = (sdmmc->regs->hostctl2 & (~SDHCI_CTRL_UHS_MASK)) | HS400_BUS_SPEED;
sdmmc->regs->hostctl2 |= SDHCI_CTRL_VDD_180;
break;
case SDHCI_TIMING_UHS_SDR25:
sdmmc->regs->hostctl2 = (sdmmc->regs->hostctl2 & (~SDHCI_CTRL_UHS_MASK)) | UHS_SDR25_BUS_SPEED;
sdmmc->regs->hostctl2 |= SDHCI_CTRL_VDD_180;
break;
case SDHCI_TIMING_UHS_SDR12:
sdmmc->regs->hostctl2 = (sdmmc->regs->hostctl2 & (~SDHCI_CTRL_UHS_MASK)) | UHS_SDR12_BUS_SPEED;
sdmmc->regs->hostctl2 |= SDHCI_CTRL_VDD_180;
break;
}
_sdmmc_commit_changes(sdmmc);
u32 clock;
u16 divisor;
clock_sdmmc_get_card_clock_div(&clock, &divisor, type);
clock_sdmmc_config_clock_source(&clock, sdmmc->id, clock);
sdmmc->divisor = (clock + divisor - 1) / divisor;
//if divisor != 1 && divisor << 31 -> error
u16 div = divisor >> 1;
divisor = 0;
if (div > 0xFF)
divisor = div >> SDHCI_DIVIDER_SHIFT;
sdmmc->regs->clkcon = (sdmmc->regs->clkcon & ~(SDHCI_DIV_MASK | SDHCI_DIV_HI_MASK))
| (div << SDHCI_DIVIDER_SHIFT) | (divisor << SDHCI_DIVIDER_HI_SHIFT);
// Enable the SD clock again.
if (should_enable_sd_clock)
sdmmc->regs->clkcon |= SDHCI_CLOCK_CARD_EN;
if (type == SDHCI_TIMING_MMC_HS400)
{
#ifdef SDMMC_EMMC_OC
bool overclock_en = clock > 208000;
return _sdmmc_dll_cal_execute(sdmmc, overclock_en);
#else
return _sdmmc_dll_cal_execute(sdmmc);
#endif
}
return 1;
}
static void _sdmmc_card_clock_enable(sdmmc_t *sdmmc)
{
// Recalibrate conditionally.
if (sdmmc->manual_cal && !sdmmc->powersave_enabled)
_sdmmc_autocal_execute(sdmmc, sdmmc_get_io_power(sdmmc));
if (!sdmmc->powersave_enabled)
{
if (!(sdmmc->regs->clkcon & SDHCI_CLOCK_CARD_EN))
sdmmc->regs->clkcon |= SDHCI_CLOCK_CARD_EN;
}
sdmmc->card_clock_enabled = 1;
}
static void _sdmmc_sd_clock_disable(sdmmc_t *sdmmc)
{
sdmmc->card_clock_enabled = 0;
sdmmc->regs->clkcon &= ~SDHCI_CLOCK_CARD_EN;
}
void sdmmc_card_clock_powersave(sdmmc_t *sdmmc, int powersave_enable)
{
// Recalibrate periodically for SDMMC1.
if (sdmmc->manual_cal && !powersave_enable && sdmmc->card_clock_enabled)
_sdmmc_autocal_execute(sdmmc, sdmmc_get_io_power(sdmmc));
sdmmc->powersave_enabled = powersave_enable;
if (powersave_enable)
{
if (sdmmc->regs->clkcon & SDHCI_CLOCK_CARD_EN)
sdmmc->regs->clkcon &= ~SDHCI_CLOCK_CARD_EN;
return;
}
if (sdmmc->card_clock_enabled)
if (!(sdmmc->regs->clkcon & SDHCI_CLOCK_CARD_EN))
sdmmc->regs->clkcon |= SDHCI_CLOCK_CARD_EN;
}
static int _sdmmc_cache_rsp(sdmmc_t *sdmmc, u32 *rsp, u32 size, u32 type)
{
switch (type)
{
case SDMMC_RSP_TYPE_1:
case SDMMC_RSP_TYPE_3:
case SDMMC_RSP_TYPE_4:
case SDMMC_RSP_TYPE_5:
if (size < 4)
return 0;
rsp[0] = sdmmc->regs->rspreg0;
break;
case SDMMC_RSP_TYPE_2:
if (size < 0x10)
return 0;
// CRC is stripped, so shifting is needed.
u32 tempreg;
for (int i = 0; i < 4; i++)
{
switch(i)
{
case 0:
tempreg = sdmmc->regs->rspreg3;
break;
case 1:
tempreg = sdmmc->regs->rspreg2;
break;
case 2:
tempreg = sdmmc->regs->rspreg1;
break;
case 3:
tempreg = sdmmc->regs->rspreg0;
break;
}
rsp[i] = tempreg << 8;
if (i != 0)
rsp[i - 1] |= (tempreg >> 24) & 0xFF;
}
break;
default:
return 0;
}
return 1;
}
int sdmmc_get_rsp(sdmmc_t *sdmmc, u32 *rsp, u32 size, u32 type)
{
if (!rsp || sdmmc->expected_rsp_type != type)
return 0;
switch (type)
{
case SDMMC_RSP_TYPE_1:
case SDMMC_RSP_TYPE_3:
case SDMMC_RSP_TYPE_4:
case SDMMC_RSP_TYPE_5:
if (size < 4)
return 0;
rsp[0] = sdmmc->rsp[0];
break;
case SDMMC_RSP_TYPE_2:
if (size < 16)
return 0;
rsp[0] = sdmmc->rsp[0];
rsp[1] = sdmmc->rsp[1];
rsp[2] = sdmmc->rsp[2];
rsp[3] = sdmmc->rsp[3];
break;
default:
return 0;
}
return 1;
}
static int _sdmmc_wait_cmd_data_inhibit(sdmmc_t *sdmmc, bool wait_dat)
{
_sdmmc_commit_changes(sdmmc);
u32 timeout = get_tmr_ms() + 2000;
while(sdmmc->regs->prnsts & SDHCI_CMD_INHIBIT)
if (get_tmr_ms() > timeout)
{
_sdmmc_reset(sdmmc);
return 0;
}
if (wait_dat)
{
timeout = get_tmr_ms() + 2000;
while (sdmmc->regs->prnsts & SDHCI_DATA_INHIBIT)
if (get_tmr_ms() > timeout)
{
_sdmmc_reset(sdmmc);
return 0;
}
}
return 1;
}
static int _sdmmc_wait_card_busy(sdmmc_t *sdmmc)
{
_sdmmc_commit_changes(sdmmc);
u32 timeout = get_tmr_ms() + 2000;
while (!(sdmmc->regs->prnsts & SDHCI_DATA_0_LVL))
if (get_tmr_ms() > timeout)
{
_sdmmc_reset(sdmmc);
return 0;
}
return 1;
}
static int _sdmmc_setup_read_small_block(sdmmc_t *sdmmc)
{
switch (sdmmc_get_bus_width(sdmmc))
{
case SDMMC_BUS_WIDTH_1:
return 0;
case SDMMC_BUS_WIDTH_4:
sdmmc->regs->blksize = 64;
break;
case SDMMC_BUS_WIDTH_8:
sdmmc->regs->blksize = 128;
break;
}
sdmmc->regs->blkcnt = 1;
sdmmc->regs->trnmod = SDHCI_TRNS_READ;
return 1;
}
static int _sdmmc_send_cmd(sdmmc_t *sdmmc, sdmmc_cmd_t *cmd, bool is_data_present)
{
u16 cmdflags = 0;
switch (cmd->rsp_type)
{
case SDMMC_RSP_TYPE_0:
break;
case SDMMC_RSP_TYPE_1:
case SDMMC_RSP_TYPE_4:
case SDMMC_RSP_TYPE_5:
if (cmd->check_busy)
cmdflags = SDHCI_CMD_RESP_LEN48_BUSY | SDHCI_CMD_INDEX | SDHCI_CMD_CRC;
else
cmdflags = SDHCI_CMD_RESP_LEN48 | SDHCI_CMD_INDEX | SDHCI_CMD_CRC;
break;
case SDMMC_RSP_TYPE_2:
cmdflags = SDHCI_CMD_RESP_LEN136 | SDHCI_CMD_CRC;
break;
case SDMMC_RSP_TYPE_3:
cmdflags = SDHCI_CMD_RESP_LEN48;
break;
default:
return 0;
}
if (is_data_present)
cmdflags |= SDHCI_CMD_DATA;
sdmmc->regs->argument = cmd->arg;
sdmmc->regs->cmdreg = (cmd->cmd << 8) | cmdflags;
return 1;
}
static void _sdmmc_send_tuning_cmd(sdmmc_t *sdmmc, u32 cmd)
{
sdmmc_cmd_t cmdbuf;
cmdbuf.cmd = cmd;
cmdbuf.arg = 0;
cmdbuf.rsp_type = SDMMC_RSP_TYPE_1;
cmdbuf.check_busy = 0;
_sdmmc_send_cmd(sdmmc, &cmdbuf, true);
}
static int _sdmmc_tuning_execute_once(sdmmc_t *sdmmc, u32 cmd)
{
if (sdmmc->powersave_enabled)
return 0;
if (!_sdmmc_wait_cmd_data_inhibit(sdmmc, true))
return 0;
_sdmmc_setup_read_small_block(sdmmc);
sdmmc->regs->norintstsen |= SDHCI_INT_DATA_AVAIL;
sdmmc->regs->norintsts = sdmmc->regs->norintsts;
sdmmc->regs->clkcon &= ~SDHCI_CLOCK_CARD_EN;
_sdmmc_send_tuning_cmd(sdmmc, cmd);
_sdmmc_commit_changes(sdmmc);
usleep(1);
_sdmmc_reset(sdmmc);
sdmmc->regs->clkcon |= SDHCI_CLOCK_CARD_EN;
_sdmmc_commit_changes(sdmmc);
u32 timeout = get_tmr_us() + 5000;
while (get_tmr_us() < timeout)
{
if (sdmmc->regs->norintsts & SDHCI_INT_DATA_AVAIL)
{
sdmmc->regs->norintsts = SDHCI_INT_DATA_AVAIL;
sdmmc->regs->norintstsen &= ~SDHCI_INT_DATA_AVAIL;
_sdmmc_commit_changes(sdmmc);
usleep((1000 * 8 + sdmmc->divisor - 1) / sdmmc->divisor);
return 1;
}
}
_sdmmc_reset(sdmmc);
sdmmc->regs->norintstsen &= ~SDHCI_INT_DATA_AVAIL;
_sdmmc_commit_changes(sdmmc);
usleep((1000 * 8 + sdmmc->divisor - 1) / sdmmc->divisor);
return 0;
}
int sdmmc_tuning_execute(sdmmc_t *sdmmc, u32 type, u32 cmd)
{
u32 max = 0, flag = 0;
switch (type)
{
case SDHCI_TIMING_MMC_HS200:
case SDHCI_TIMING_MMC_HS400:
case SDHCI_TIMING_UHS_SDR104:
case SDHCI_TIMING_UHS_SDR82:
max = 128;
flag = (2 << 13); // 128 iterations.
break;
case SDHCI_TIMING_UHS_SDR50:
case SDHCI_TIMING_UHS_DDR50:
case SDHCI_TIMING_MMC_HS102:
max = 256;
flag = (4 << 13); // 256 iterations.
break;
case SDHCI_TIMING_UHS_SDR12:
case SDHCI_TIMING_UHS_SDR25:
return 1;
default:
return 0;
}
sdmmc->regs->ventunctl1 = 0; // step_size 1.
sdmmc->regs->ventunctl0 = (sdmmc->regs->ventunctl0 & 0xFFFF1FFF) | flag; // Tries.
sdmmc->regs->ventunctl0 = (sdmmc->regs->ventunctl0 & 0xFFFFE03F) | (1 << 6); // 1x Multiplier.
sdmmc->regs->ventunctl0 |= TEGRA_MMC_VNDR_TUN_CTRL0_TAP_VAL_UPDATED_BY_HW;
sdmmc->regs->hostctl2 |= SDHCI_CTRL_EXEC_TUNING;
for (u32 i = 0; i < max; i++)
{
_sdmmc_tuning_execute_once(sdmmc, cmd);
if (!(sdmmc->regs->hostctl2 & SDHCI_CTRL_EXEC_TUNING))
break;
}
if (sdmmc->regs->hostctl2 & SDHCI_CTRL_TUNED_CLK)
return 1;
return 0;
}
static int _sdmmc_enable_internal_clock(sdmmc_t *sdmmc)
{
//Enable internal clock and wait till it is stable.
sdmmc->regs->clkcon |= SDHCI_CLOCK_INT_EN;
_sdmmc_commit_changes(sdmmc);
u32 timeout = get_tmr_ms() + 2000;
while (!(sdmmc->regs->clkcon & SDHCI_CLOCK_INT_STABLE))
{
if (get_tmr_ms() > timeout)
return 0;
}
sdmmc->regs->hostctl2 &= ~SDHCI_CTRL_PRESET_VAL_EN;
sdmmc->regs->clkcon &= ~SDHCI_PROG_CLOCK_MODE;
// Enable 32bit addressing if used (sysad. if blkcnt it fallbacks to 16bit).
sdmmc->regs->hostctl2 |= SDHCI_HOST_VERSION_4_EN;
if (!(sdmmc->regs->capareg & SDHCI_CAN_64BIT))
return 0;
sdmmc->regs->hostctl2 |= SDHCI_ADDRESSING_64BIT_EN;
sdmmc->regs->hostctl &= ~SDHCI_CTRL_DMA_MASK;
sdmmc->regs->timeoutcon = (sdmmc->regs->timeoutcon & 0xF0) | 14; // TMCLK * 2^27.
return 1;
}
static int _sdmmc_autocal_config_offset(sdmmc_t *sdmmc, u32 power)
{
u32 off_pd = 0;
u32 off_pu = 0;
switch (sdmmc->id)
{
case SDMMC_2:
case SDMMC_4:
if (power != SDMMC_POWER_1_8)
return 0;
off_pd = 5;
off_pu = 5;
break;
case SDMMC_1:
if (power == SDMMC_POWER_1_8)
{
if (!sdmmc->t210b01)
{
off_pd = 123;
off_pu = 123;
}
else
{
off_pd = 6;
off_pu = 6;
}
}
else if (power == SDMMC_POWER_3_3)
{
if (!sdmmc->t210b01)
{
off_pd = 125;
off_pu = 0;
}
}
else
return 0;
break;
}
sdmmc->regs->autocalcfg = (sdmmc->regs->autocalcfg & 0xFFFF8080) | (off_pd << 8) | off_pu;
return 1;
}
static void _sdmmc_enable_interrupts(sdmmc_t *sdmmc)
{
sdmmc->regs->norintstsen |= SDHCI_INT_DMA_END | SDHCI_INT_DATA_END | SDHCI_INT_RESPONSE;
sdmmc->regs->errintstsen |= SDHCI_ERR_INT_ALL_EXCEPT_ADMA_BUSPWR;
sdmmc->regs->norintsts = sdmmc->regs->norintsts;
sdmmc->regs->errintsts = sdmmc->regs->errintsts;
}
static void _sdmmc_mask_interrupts(sdmmc_t *sdmmc)
{
sdmmc->regs->errintstsen &= ~SDHCI_ERR_INT_ALL_EXCEPT_ADMA_BUSPWR;
sdmmc->regs->norintstsen &= ~(SDHCI_INT_DMA_END | SDHCI_INT_DATA_END | SDHCI_INT_RESPONSE);
}
static u32 _sdmmc_check_mask_interrupt(sdmmc_t *sdmmc, u16 *pout, u16 mask)
{
u16 norintsts = sdmmc->regs->norintsts;
u16 errintsts = sdmmc->regs->errintsts;
DPRINTF("norintsts %08X, errintsts %08X\n", norintsts, errintsts);
if (pout)
*pout = norintsts;
// Check for error interrupt.
if (norintsts & SDHCI_INT_ERROR)
{
#ifdef ERROR_EXTRA_PRINTING
EPRINTFARGS("SDMMC: norintsts %08X, errintsts %08X\n", norintsts, errintsts);
#endif
sdmmc->regs->errintsts = errintsts;
return SDMMC_MASKINT_ERROR;
}
else if (norintsts & mask)
{
sdmmc->regs->norintsts = norintsts & mask;
return SDMMC_MASKINT_MASKED;
}
return SDMMC_MASKINT_NOERROR;
}
static int _sdmmc_wait_response(sdmmc_t *sdmmc)
{
_sdmmc_commit_changes(sdmmc);
u32 timeout = get_tmr_ms() + 2000;
while (true)
{
u32 result = _sdmmc_check_mask_interrupt(sdmmc, NULL, SDHCI_INT_RESPONSE);
if (result == SDMMC_MASKINT_MASKED)
break;
if (result != SDMMC_MASKINT_NOERROR || get_tmr_ms() > timeout)
{
_sdmmc_reset(sdmmc);
return 0;
}
}
return 1;
}
static int _sdmmc_stop_transmission_inner(sdmmc_t *sdmmc, u32 *rsp)
{
sdmmc_cmd_t cmd;
if (!_sdmmc_wait_cmd_data_inhibit(sdmmc, false))
return 0;
_sdmmc_enable_interrupts(sdmmc);
cmd.cmd = MMC_STOP_TRANSMISSION;
cmd.arg = 0;
cmd.rsp_type = SDMMC_RSP_TYPE_1;
cmd.check_busy = 1;
_sdmmc_send_cmd(sdmmc, &cmd, false);
int result = _sdmmc_wait_response(sdmmc);
_sdmmc_mask_interrupts(sdmmc);
if (!result)
return 0;
_sdmmc_cache_rsp(sdmmc, rsp, 4, SDMMC_RSP_TYPE_1);
return _sdmmc_wait_card_busy(sdmmc);
}
int sdmmc_stop_transmission(sdmmc_t *sdmmc, u32 *rsp)
{
if (!sdmmc->card_clock_enabled)
return 0;
// Recalibrate periodically for SDMMC1.
if (sdmmc->manual_cal && sdmmc->powersave_enabled)
_sdmmc_autocal_execute(sdmmc, sdmmc_get_io_power(sdmmc));
bool should_disable_sd_clock = false;
if (!(sdmmc->regs->clkcon & SDHCI_CLOCK_CARD_EN))
{
should_disable_sd_clock = true;
sdmmc->regs->clkcon |= SDHCI_CLOCK_CARD_EN;
_sdmmc_commit_changes(sdmmc);
usleep((8000 + sdmmc->divisor - 1) / sdmmc->divisor);
}
int result = _sdmmc_stop_transmission_inner(sdmmc, rsp);
usleep((8000 + sdmmc->divisor - 1) / sdmmc->divisor);
if (should_disable_sd_clock)
sdmmc->regs->clkcon &= ~SDHCI_CLOCK_CARD_EN;
return result;
}
static int _sdmmc_config_dma(sdmmc_t *sdmmc, u32 *blkcnt_out, sdmmc_req_t *req)
{
if (!req->blksize || !req->num_sectors)
return 0;
u32 blkcnt = req->num_sectors;
if (blkcnt >= 0xFFFF)
blkcnt = 0xFFFF;
u32 admaaddr = (u32)req->buf;
// Check alignment.
if (admaaddr & 7)
return 0;
sdmmc->regs->admaaddr = admaaddr;
sdmmc->regs->admaaddr_hi = 0;
sdmmc->dma_addr_next = (admaaddr + 0x80000) & 0xFFF80000;
sdmmc->regs->blksize = req->blksize | 0x7000; // DMA 512KB (Detects A18 carry out).
sdmmc->regs->blkcnt = blkcnt;
if (blkcnt_out)
*blkcnt_out = blkcnt;
u32 trnmode = SDHCI_TRNS_DMA;
// Set mulitblock request.
if (req->is_multi_block)
trnmode |= SDHCI_TRNS_MULTI | SDHCI_TRNS_BLK_CNT_EN;
// Set request direction.
if (!req->is_write)
trnmode |= SDHCI_TRNS_READ;
// Automatic send of stop transmission or set block count cmd.
if (req->is_auto_stop_trn)
trnmode |= SDHCI_TRNS_AUTO_CMD12;
//else if (req->is_auto_set_blkcnt)
// trnmode |= SDHCI_TRNS_AUTO_CMD23;
sdmmc->regs->trnmod = trnmode;
return 1;
}
static int _sdmmc_update_dma(sdmmc_t *sdmmc)
{
u16 blkcnt = 0;
do
{
blkcnt = sdmmc->regs->blkcnt;
u32 timeout = get_tmr_ms() + 1500;
do
{
u32 result = SDMMC_MASKINT_MASKED;
while (true)
{
u16 intr = 0;
result = _sdmmc_check_mask_interrupt(sdmmc, &intr,
SDHCI_INT_DATA_END | SDHCI_INT_DMA_END);
if (result != SDMMC_MASKINT_MASKED)
break;
if (intr & SDHCI_INT_DATA_END)
return 1; // Transfer complete.
if (intr & SDHCI_INT_DMA_END)
{
// Update DMA.
sdmmc->regs->admaaddr = sdmmc->dma_addr_next;
sdmmc->regs->admaaddr_hi = 0;
sdmmc->dma_addr_next += 0x80000;
}
}
if (result != SDMMC_MASKINT_NOERROR)
{
#ifdef ERROR_EXTRA_PRINTING
EPRINTFARGS("%08X!", result);
#endif
_sdmmc_reset(sdmmc);
return 0;
}
} while (get_tmr_ms() < timeout);
} while (sdmmc->regs->blkcnt != blkcnt);
_sdmmc_reset(sdmmc);
return 0;
}
static int _sdmmc_execute_cmd_inner(sdmmc_t *sdmmc, sdmmc_cmd_t *cmd, sdmmc_req_t *req, u32 *blkcnt_out)
{
int has_req_or_check_busy = req || cmd->check_busy;
if (!_sdmmc_wait_cmd_data_inhibit(sdmmc, has_req_or_check_busy))
return 0;
u32 blkcnt = 0;
bool is_data_present = false;
if (req)
{
if (!_sdmmc_config_dma(sdmmc, &blkcnt, req))
{
#ifdef ERROR_EXTRA_PRINTING
EPRINTF("SDMMC: DMA Wrong cfg!");
#endif
return 0;
}
// Flush cache before starting the transfer.
bpmp_mmu_maintenance(BPMP_MMU_MAINT_CLEAN_WAY, false);
is_data_present = true;
}
_sdmmc_enable_interrupts(sdmmc);
if (!_sdmmc_send_cmd(sdmmc, cmd, is_data_present))
{
#ifdef ERROR_EXTRA_PRINTING
EPRINTFARGS("SDMMC: Wrong Response type %08X!", cmd->rsp_type);
#endif
return 0;
}
int result = _sdmmc_wait_response(sdmmc);
#ifdef ERROR_EXTRA_PRINTING
if (!result)
EPRINTF("SDMMC: Transfer timeout!");
#endif
DPRINTF("rsp(%d): %08X, %08X, %08X, %08X\n", result,
sdmmc->regs->rspreg0, sdmmc->regs->rspreg1, sdmmc->regs->rspreg2, sdmmc->regs->rspreg3);
if (result)
{
if (cmd->rsp_type)
{
sdmmc->expected_rsp_type = cmd->rsp_type;
result = _sdmmc_cache_rsp(sdmmc, sdmmc->rsp, 0x10, cmd->rsp_type);
#ifdef ERROR_EXTRA_PRINTING
if (!result)
EPRINTF("SDMMC: Unknown response type!");
#endif
}
if (req && result)
{
result = _sdmmc_update_dma(sdmmc);
#ifdef ERROR_EXTRA_PRINTING
if (!result)
EPRINTF("SDMMC: DMA Update failed!");
#endif
}
}
_sdmmc_mask_interrupts(sdmmc);
if (result)
{
if (req)
{
// Invalidate cache after transfer.
bpmp_mmu_maintenance(BPMP_MMU_MAINT_INVALID_WAY, false);
if (blkcnt_out)
*blkcnt_out = blkcnt;
if (req->is_auto_stop_trn)
sdmmc->rsp3 = sdmmc->regs->rspreg3;
}
if (cmd->check_busy || req)
{
result = _sdmmc_wait_card_busy(sdmmc);
#ifdef ERROR_EXTRA_PRINTING
if (!result)
EPRINTF("SDMMC: Busy timeout!");
#endif
return result;
}
}
return result;
}
bool sdmmc_get_sd_inserted()
{
return (!gpio_read(GPIO_PORT_Z, GPIO_PIN_1));
}
static void _sdmmc_config_sdmmc1_schmitt()
{
PINMUX_AUX(PINMUX_AUX_SDMMC1_CLK) |= PINMUX_SCHMT;
PINMUX_AUX(PINMUX_AUX_SDMMC1_CMD) |= PINMUX_SCHMT;
PINMUX_AUX(PINMUX_AUX_SDMMC1_DAT3) |= PINMUX_SCHMT;
PINMUX_AUX(PINMUX_AUX_SDMMC1_DAT2) |= PINMUX_SCHMT;
PINMUX_AUX(PINMUX_AUX_SDMMC1_DAT1) |= PINMUX_SCHMT;
PINMUX_AUX(PINMUX_AUX_SDMMC1_DAT0) |= PINMUX_SCHMT;
}
static void _sdmmc_config_sdmmc2_schmitt()
{
PINMUX_AUX(PINMUX_AUX_SDMMC2_CLK) |= PINMUX_SCHMT;
PINMUX_AUX(PINMUX_AUX_SDMMC2_CMD) |= PINMUX_SCHMT;
PINMUX_AUX(PINMUX_AUX_SDMMC2_DAT7) |= PINMUX_SCHMT;
PINMUX_AUX(PINMUX_AUX_SDMMC2_DAT6) |= PINMUX_SCHMT;
PINMUX_AUX(PINMUX_AUX_SDMMC2_DAT5) |= PINMUX_SCHMT;
PINMUX_AUX(PINMUX_AUX_SDMMC2_DAT4) |= PINMUX_SCHMT;
PINMUX_AUX(PINMUX_AUX_SDMMC2_DAT3) |= PINMUX_SCHMT;
PINMUX_AUX(PINMUX_AUX_SDMMC2_DAT2) |= PINMUX_SCHMT;
PINMUX_AUX(PINMUX_AUX_SDMMC2_DAT1) |= PINMUX_SCHMT;
PINMUX_AUX(PINMUX_AUX_SDMMC2_DAT0) |= PINMUX_SCHMT;
}
static void _sdmmc_config_sdmmc1_pads(bool discharge)
{
u32 sdmmc1_pin_mask = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3 | GPIO_PIN_4 | GPIO_PIN_5;
// Set values for Reset state.
u32 function = GPIO_MODE_SPIO;
u32 level = GPIO_LOW;
u32 output = GPIO_OUTPUT_DISABLE;
// Set values for dicharging.
if (discharge)
{
function = GPIO_MODE_GPIO;
level = GPIO_HIGH;
output = GPIO_OUTPUT_ENABLE;
}
// Set all pads function.
gpio_config(GPIO_PORT_M, sdmmc1_pin_mask, function);
// Set all pads output level.
gpio_write(GPIO_PORT_M, sdmmc1_pin_mask, level);
// Set all pads output.
gpio_output_enable(GPIO_PORT_M, sdmmc1_pin_mask, output);
}
static int _sdmmc_config_sdmmc1(bool t210b01)
{
// Configure SD card detect.
PINMUX_AUX(PINMUX_AUX_GPIO_PZ1) = PINMUX_INPUT_ENABLE | PINMUX_PULL_UP | 2; // GPIO control, pull up.
APB_MISC(APB_MISC_GP_VGPIO_GPIO_MUX_SEL) = 0;
gpio_config(GPIO_PORT_Z, GPIO_PIN_1, GPIO_MODE_GPIO);
gpio_output_enable(GPIO_PORT_Z, GPIO_PIN_1, GPIO_OUTPUT_DISABLE);
usleep(100);
// Check if SD card is inserted.
if(!sdmmc_get_sd_inserted())
return 0;
/*
* Pinmux config:
* DRV_TYPE = DRIVE_2X (for 33 Ohm driver)
* E_SCHMT = ENABLE (for 1.8V), DISABLE (for 3.3V)
* E_INPUT = ENABLE
* TRISTATE = PASSTHROUGH
* APB_MISC_GP_SDMMCx_CLK_LPBK_CONTROL = SDMMCx_CLK_PAD_E_LPBK for CLK
*/
// Enable deep loopback for SDMMC1 CLK pad.
APB_MISC(APB_MISC_GP_SDMMC1_CLK_LPBK_CONTROL) = 1;
// Configure SDMMC1 CLK pinmux, based on state and SoC type.
if (PINMUX_AUX(PINMUX_AUX_SDMMC1_CLK) != (PINMUX_DRIVE_2X | PINMUX_INPUT_ENABLE | PINMUX_PULL_DOWN)) // Check if CLK pad is already configured.
PINMUX_AUX(PINMUX_AUX_SDMMC1_CLK) = PINMUX_DRIVE_2X | PINMUX_INPUT_ENABLE | (t210b01 ? PINMUX_PULL_NONE : PINMUX_PULL_DOWN);
// Configure reset state of SDMMC1 pins pinmux.
PINMUX_AUX(PINMUX_AUX_SDMMC1_CMD) = PINMUX_DRIVE_2X | PINMUX_INPUT_ENABLE | PINMUX_PULL_UP;
PINMUX_AUX(PINMUX_AUX_SDMMC1_DAT3) = PINMUX_DRIVE_2X | PINMUX_INPUT_ENABLE | PINMUX_PULL_UP;
PINMUX_AUX(PINMUX_AUX_SDMMC1_DAT2) = PINMUX_DRIVE_2X | PINMUX_INPUT_ENABLE | PINMUX_PULL_UP;
PINMUX_AUX(PINMUX_AUX_SDMMC1_DAT1) = PINMUX_DRIVE_2X | PINMUX_INPUT_ENABLE | PINMUX_PULL_UP;
PINMUX_AUX(PINMUX_AUX_SDMMC1_DAT0) = PINMUX_DRIVE_2X | PINMUX_INPUT_ENABLE | PINMUX_PULL_UP;
// Force schmitt trigger for T210B01.
if (t210b01)
_sdmmc_config_sdmmc1_schmitt();
// Make sure the SDMMC1 controller is powered.
PMC(APBDEV_PMC_NO_IOPOWER) |= PMC_NO_IOPOWER_SDMMC1_IO_EN;
usleep(1000);
PMC(APBDEV_PMC_NO_IOPOWER) &= ~(PMC_NO_IOPOWER_SDMMC1_IO_EN);
(void)PMC(APBDEV_PMC_NO_IOPOWER); // Commit write.
// Inform IO pads that voltage is gonna be 3.3V.
PMC(APBDEV_PMC_PWR_DET_VAL) |= PMC_PWR_DET_SDMMC1_IO_EN;
(void)PMC(APBDEV_PMC_PWR_DET_VAL); // Commit write.
// Set enable SD card power.
PINMUX_AUX(PINMUX_AUX_DMIC3_CLK) = PINMUX_PULL_DOWN | 2;
gpio_config(GPIO_PORT_E, GPIO_PIN_4, GPIO_MODE_GPIO);
gpio_write(GPIO_PORT_E, GPIO_PIN_4, GPIO_HIGH);
gpio_output_enable(GPIO_PORT_E, GPIO_PIN_4, GPIO_OUTPUT_ENABLE);
usleep(10000);
// Enable SD card IO power.
max7762x_regulator_set_voltage(REGULATOR_LDO2, 3300000);
max7762x_regulator_enable(REGULATOR_LDO2, true);
usleep(1000);
// Set pad slew codes to get good quality clock.
if (!t210b01)
{
APB_MISC(APB_MISC_GP_SDMMC1_PAD_CFGPADCTRL) = (APB_MISC(APB_MISC_GP_SDMMC1_PAD_CFGPADCTRL) & 0xFFFFFFF) | 0x50000000;
(void)APB_MISC(APB_MISC_GP_SDMMC1_PAD_CFGPADCTRL); // Commit write.
usleep(1000);
}
return 1;
}
static void _sdmmc_config_emmc(u32 id, bool t210b01)
{
switch (id)
{
case SDMMC_2:
if (!t210b01)
{
// Unset park for pads.
APB_MISC(APB_MISC_GP_EMMC2_PAD_CFGPADCTRL) &= 0xF8003FFF;
(void)APB_MISC(APB_MISC_GP_EMMC2_PAD_CFGPADCTRL); // Commit write.
}
else // Enable schmitt trigger for T210B01.
_sdmmc_config_sdmmc2_schmitt();
break;
case SDMMC_4:
// Unset park for pads.
APB_MISC(APB_MISC_GP_EMMC4_PAD_CFGPADCTRL) &= 0xF8003FFF;
// Set default pad cfg.
if (t210b01)
APB_MISC(APB_MISC_GP_EMMC4_PAD_PUPD_CFGPADCTRL) &= 0xFFBFFFF9; // Unset CMD/CLK/DQS powedown.
// Enable schmitt trigger.
APB_MISC(APB_MISC_GP_EMMC4_PAD_CFGPADCTRL) |= 1;
(void)APB_MISC(APB_MISC_GP_EMMC4_PAD_CFGPADCTRL); // Commit write.
break;
}
}
int sdmmc_init(sdmmc_t *sdmmc, u32 id, u32 power, u32 bus_width, u32 type, int powersave_enable)
{
u32 clock;
u16 divisor;
u8 vref_sel = 7;
const u32 trim_values_t210[] = { 2, 8, 3, 8 };
const u32 trim_values_t210b01[] = { 14, 13, 15, 13 };
const u32 *trim_values;
if (id > SDMMC_4 || id == SDMMC_3)
return 0;
memset(sdmmc, 0, sizeof(sdmmc_t));
sdmmc->regs = (t210_sdmmc_t *)_sdmmc_bases[id];
sdmmc->id = id;
sdmmc->clock_stopped = 1;
sdmmc->t210b01 = hw_get_chip_id() == GP_HIDREV_MAJOR_T210B01;
trim_values = sdmmc->t210b01 ? trim_values_t210b01 : trim_values_t210;
// Do specific SDMMC HW configuration.
switch (id)
{
case SDMMC_1:
if (!_sdmmc_config_sdmmc1(sdmmc->t210b01))
return 0;
if (sdmmc->t210b01)
vref_sel = 0;
else
sdmmc->manual_cal = 1;
break;
case SDMMC_2:
case SDMMC_4:
_sdmmc_config_emmc(id, sdmmc->t210b01);
break;
}
// Disable clock if enabled.
if (clock_sdmmc_is_not_reset_and_enabled(id))
{
_sdmmc_sd_clock_disable(sdmmc);
_sdmmc_commit_changes(sdmmc);
}
// Configure and enable selected clock.
clock_sdmmc_get_card_clock_div(&clock, &divisor, type);
clock_sdmmc_enable(id, clock);
// Make sure all sdmmc registers are reset.
_sdmmc_reset_all(sdmmc);
sdmmc->clock_stopped = 0;
// Set default pad IO trimming configuration.
sdmmc->regs->iospare |= 0x80000; // Enable muxing.
sdmmc->regs->veniotrimctl &= 0xFFFFFFFB; // Set Band Gap VREG to supply DLL.
sdmmc->regs->venclkctl = (sdmmc->regs->venclkctl & 0xE0FFFFFB) | (trim_values[sdmmc->id] << 24);
sdmmc->regs->sdmemcmppadctl =
(sdmmc->regs->sdmemcmppadctl & TEGRA_MMC_SDMEMCOMPPADCTRL_COMP_VREF_SEL_MASK) | vref_sel;
// Configure auto calibration values.
if (!_sdmmc_autocal_config_offset(sdmmc, power))
return 0;
// Calibrate pads.
_sdmmc_autocal_execute(sdmmc, power);
// Enable internal clock and power.
if (_sdmmc_enable_internal_clock(sdmmc))
{
sdmmc_set_bus_width(sdmmc, bus_width);
_sdmmc_set_io_power(sdmmc, power);
if (sdmmc_setup_clock(sdmmc, type))
{
sdmmc_card_clock_powersave(sdmmc, powersave_enable);
_sdmmc_card_clock_enable(sdmmc);
_sdmmc_commit_changes(sdmmc);
return 1;
}
}
return 0;
}
void sdmmc1_disable_power()
{
// T210B01 WAR: Clear pull down from CLK pad.
PINMUX_AUX(PINMUX_AUX_SDMMC1_CLK) &= ~PINMUX_PULL_MASK;
// T210B01 WAR: Set pads to discharge state.
_sdmmc_config_sdmmc1_pads(true);
// Disable SD card IO power regulator.
max7762x_regulator_enable(REGULATOR_LDO2, false);
usleep(4000);
// Disable SD card IO power pin.
gpio_write(GPIO_PORT_E, GPIO_PIN_4, GPIO_LOW);
// T210/T210B01 WAR: Set start timer for IO and Controller power discharge.
sd_power_cycle_time_start = get_tmr_ms();
usleep(1000); // To power cycle, min 1ms without power is needed.
// Disable SDMMC1 controller power.
PMC(APBDEV_PMC_NO_IOPOWER) |= PMC_NO_IOPOWER_SDMMC1_IO_EN;
(void)PMC(APBDEV_PMC_NO_IOPOWER); // Commit write.
// Inform IO pads that next voltage might be 3.3V.
PMC(APBDEV_PMC_PWR_DET_VAL) |= PMC_PWR_DET_SDMMC1_IO_EN;
(void)PMC(APBDEV_PMC_PWR_DET_VAL); // Commit write.
// T210B01 WAR: Restore pads to reset state.
_sdmmc_config_sdmmc1_pads(false);
// T210B01 WAR: Restore pull down to CLK pad.
PINMUX_AUX(PINMUX_AUX_SDMMC1_CLK) |= PINMUX_PULL_DOWN;
}
void sdmmc_end(sdmmc_t *sdmmc)
{
if (!sdmmc->clock_stopped)
{
_sdmmc_sd_clock_disable(sdmmc);
// Disable SDMMC power.
_sdmmc_set_io_power(sdmmc, SDMMC_POWER_OFF);
_sdmmc_commit_changes(sdmmc);
// Disable SD card power.
if (sdmmc->id == SDMMC_1)
sdmmc1_disable_power();
clock_sdmmc_disable(sdmmc->id);
sdmmc->clock_stopped = 1;
}
}
void sdmmc_init_cmd(sdmmc_cmd_t *cmdbuf, u16 cmd, u32 arg, u32 rsp_type, u32 check_busy)
{
cmdbuf->cmd = cmd;
cmdbuf->arg = arg;
cmdbuf->rsp_type = rsp_type;
cmdbuf->check_busy = check_busy;
}
int sdmmc_execute_cmd(sdmmc_t *sdmmc, sdmmc_cmd_t *cmd, sdmmc_req_t *req, u32 *blkcnt_out)
{
if (!sdmmc->card_clock_enabled)
return 0;
// Recalibrate periodically for SDMMC1.
if (sdmmc->manual_cal && sdmmc->powersave_enabled)
_sdmmc_autocal_execute(sdmmc, sdmmc_get_io_power(sdmmc));
int should_disable_sd_clock = 0;
if (!(sdmmc->regs->clkcon & SDHCI_CLOCK_CARD_EN))
{
should_disable_sd_clock = 1;
sdmmc->regs->clkcon |= SDHCI_CLOCK_CARD_EN;
_sdmmc_commit_changes(sdmmc);
usleep((8000 + sdmmc->divisor - 1) / sdmmc->divisor);
}
int result = _sdmmc_execute_cmd_inner(sdmmc, cmd, req, blkcnt_out);
usleep((8000 + sdmmc->divisor - 1) / sdmmc->divisor);
if (should_disable_sd_clock)
sdmmc->regs->clkcon &= ~SDHCI_CLOCK_CARD_EN;
return result;
}
int sdmmc_enable_low_voltage(sdmmc_t *sdmmc)
{
if(sdmmc->id != SDMMC_1)
return 0;
if (!sdmmc_setup_clock(sdmmc, SDHCI_TIMING_UHS_SDR12))
return 0;
_sdmmc_commit_changes(sdmmc);
// Switch to 1.8V and wait for regulator to stabilize. Assume max possible wait needed.
max7762x_regulator_set_voltage(REGULATOR_LDO2, 1800000);
usleep(150);
// Inform IO pads that we switched to 1.8V.
PMC(APBDEV_PMC_PWR_DET_VAL) &= ~(PMC_PWR_DET_SDMMC1_IO_EN);
(void)PMC(APBDEV_PMC_PWR_DET_VAL); // Commit write.
// Enable schmitt trigger for better duty cycle and low jitter clock.
_sdmmc_config_sdmmc1_schmitt();
_sdmmc_autocal_config_offset(sdmmc, SDMMC_POWER_1_8);
_sdmmc_autocal_execute(sdmmc, SDMMC_POWER_1_8);
_sdmmc_set_io_power(sdmmc, SDMMC_POWER_1_8);
_sdmmc_commit_changes(sdmmc);
msleep(5); // Wait minimum 5ms before turning on the card clock.
// Turn on SDCLK.
if (sdmmc->regs->hostctl2 & SDHCI_CTRL_VDD_180)
{
sdmmc->regs->clkcon |= SDHCI_CLOCK_CARD_EN;
_sdmmc_commit_changes(sdmmc);
usleep(1000);
if ((sdmmc->regs->prnsts & SDHCI_DATA_LVL_MASK) == SDHCI_DATA_LVL_MASK)
return 1;
}
return 0;
}
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