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Atmosphere/emummc/source/soc/clock.c

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/*
* Copyright (c) 2018 naehrwert
* Copyright (c) 2018-2020 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 "../soc/clock.h"
#include "../soc/t210.h"
#include "../utils/util.h"
#include "../emmc/sdmmc.h"
static const sclock_t _clock_i2c5 = {
CLK_RST_CONTROLLER_RST_DEVICES_H, CLK_RST_CONTROLLER_CLK_OUT_ENB_H, CLK_RST_CONTROLLER_CLK_SOURCE_I2C5, 0xF, 0, 4 //81.6MHz -> 400KHz
};
static sclock_t _clock_sdmmc_legacy_tm = {
CLK_RST_CONTROLLER_RST_DEVICES_Y, CLK_RST_CONTROLLER_CLK_OUT_ENB_Y, CLK_RST_CONTROLLER_CLK_SOURCE_SDMMC_LEGACY_TM, 1, 4, 66
};
void clock_enable(const sclock_t *clk)
{
// Put clock into reset.
CLOCK(clk->reset) = (CLOCK(clk->reset) & ~(1 << clk->index)) | (1 << clk->index);
// Disable.
CLOCK(clk->enable) &= ~(1 << clk->index);
// Configure clock source if required.
if (clk->source)
CLOCK(clk->source) = clk->clk_div | (clk->clk_src << 29);
// Enable.
CLOCK(clk->enable) = (CLOCK(clk->enable) & ~(1 << clk->index)) | (1 << clk->index);
usleep(2);
// Take clock off reset.
CLOCK(clk->reset) &= ~(1 << clk->index);
}
void clock_disable(const sclock_t *clk)
{
// Put clock into reset.
CLOCK(clk->reset) = (CLOCK(clk->reset) & ~(1 << clk->index)) | (1 << clk->index);
// Disable.
CLOCK(clk->enable) &= ~(1 << clk->index);
}
void clock_enable_i2c5()
{
clock_enable(&_clock_i2c5);
}
void clock_disable_i2c5()
{
clock_disable(&_clock_i2c5);
}
static void _clock_enable_pllc4()
{
if ((CLOCK(CLK_RST_CONTROLLER_PLLC4_BASE) & (PLLCX_BASE_ENABLE | PLLCX_BASE_LOCK | 0xFFFFFF))
== (PLLCX_BASE_ENABLE | PLLCX_BASE_LOCK | (104 << 8) | 4))
return;
// Enable Phase and Frequency lock detection.
//CLOCK(CLK_RST_CONTROLLER_PLLC4_MISC) = PLLC4_MISC_EN_LCKDET;
// Disable PLL and IDDQ in case they are on.
CLOCK(CLK_RST_CONTROLLER_PLLC4_BASE) &= ~PLLCX_BASE_ENABLE;
CLOCK(CLK_RST_CONTROLLER_PLLC4_BASE) &= ~PLLC4_BASE_IDDQ;
(void)CLOCK(CLK_RST_CONTROLLER_PLLC4_BASE);
usleep(10);
// Set PLLC4 dividers.
CLOCK(CLK_RST_CONTROLLER_PLLC4_BASE) = (104 << 8) | 4; // DIVM: 4, DIVP: 1.
// Enable PLLC4 and wait for Phase and Frequency lock.
CLOCK(CLK_RST_CONTROLLER_PLLC4_BASE) |= PLLCX_BASE_ENABLE;
(void)CLOCK(CLK_RST_CONTROLLER_PLLC4_BASE);
while (!(CLOCK(CLK_RST_CONTROLLER_PLLC4_BASE) & PLLCX_BASE_LOCK))
;
msleep(1); // Wait a bit for PLL to stabilize.
}
#define L_SWR_SDMMC1_RST (1 << 14)
#define L_SWR_SDMMC2_RST (1 << 9)
#define L_SWR_SDMMC4_RST (1 << 15)
#define U_SWR_SDMMC3_RST (1 << 5)
#define L_CLK_ENB_SDMMC1 (1 << 14)
#define L_CLK_ENB_SDMMC2 (1 << 9)
#define L_CLK_ENB_SDMMC4 (1 << 15)
#define U_CLK_ENB_SDMMC3 (1 << 5)
#define L_SET_SDMMC1_RST (1 << 14)
#define L_SET_SDMMC2_RST (1 << 9)
#define L_SET_SDMMC4_RST (1 << 15)
#define U_SET_SDMMC3_RST (1 << 5)
#define L_CLR_SDMMC1_RST (1 << 14)
#define L_CLR_SDMMC2_RST (1 << 9)
#define L_CLR_SDMMC4_RST (1 << 15)
#define U_CLR_SDMMC3_RST (1 << 5)
#define L_SET_CLK_ENB_SDMMC1 (1 << 14)
#define L_SET_CLK_ENB_SDMMC2 (1 << 9)
#define L_SET_CLK_ENB_SDMMC4 (1 << 15)
#define U_SET_CLK_ENB_SDMMC3 (1 << 5)
#define L_CLR_CLK_ENB_SDMMC1 (1 << 14)
#define L_CLR_CLK_ENB_SDMMC2 (1 << 9)
#define L_CLR_CLK_ENB_SDMMC4 (1 << 15)
#define U_CLR_CLK_ENB_SDMMC3 (1 << 5)
static int _clock_sdmmc_is_reset(u32 id)
{
switch (id)
{
case SDMMC_1:
return CLOCK(CLK_RST_CONTROLLER_RST_DEVICES_L) & L_SWR_SDMMC1_RST;
case SDMMC_2:
return CLOCK(CLK_RST_CONTROLLER_RST_DEVICES_L) & L_SWR_SDMMC2_RST;
case SDMMC_3:
return CLOCK(CLK_RST_CONTROLLER_RST_DEVICES_U) & U_SWR_SDMMC3_RST;
case SDMMC_4:
return CLOCK(CLK_RST_CONTROLLER_RST_DEVICES_L) & L_SWR_SDMMC4_RST;
}
return 0;
}
static void _clock_sdmmc_set_reset(u32 id)
{
switch (id)
{
case SDMMC_1:
CLOCK(CLK_RST_CONTROLLER_RST_DEV_L_SET) = L_SET_SDMMC1_RST;
break;
case SDMMC_2:
CLOCK(CLK_RST_CONTROLLER_RST_DEV_L_SET) = L_SET_SDMMC2_RST;
break;
case SDMMC_3:
CLOCK(CLK_RST_CONTROLLER_RST_DEV_U_SET) = U_SET_SDMMC3_RST;
break;
case SDMMC_4:
CLOCK(CLK_RST_CONTROLLER_RST_DEV_L_SET) = L_SET_SDMMC4_RST;
break;
}
}
static void _clock_sdmmc_clear_reset(u32 id)
{
switch (id)
{
case SDMMC_1:
CLOCK(CLK_RST_CONTROLLER_RST_DEV_L_CLR) = L_CLR_SDMMC1_RST;
break;
case SDMMC_2:
CLOCK(CLK_RST_CONTROLLER_RST_DEV_L_CLR) = L_CLR_SDMMC2_RST;
break;
case SDMMC_3:
CLOCK(CLK_RST_CONTROLLER_RST_DEV_U_CLR) = U_CLR_SDMMC3_RST;
break;
case SDMMC_4:
CLOCK(CLK_RST_CONTROLLER_RST_DEV_L_CLR) = L_CLR_SDMMC4_RST;
break;
}
}
static int _clock_sdmmc_is_enabled(u32 id)
{
switch (id)
{
case SDMMC_1:
return CLOCK(CLK_RST_CONTROLLER_CLK_OUT_ENB_L) & L_CLK_ENB_SDMMC1;
case SDMMC_2:
return CLOCK(CLK_RST_CONTROLLER_CLK_OUT_ENB_L) & L_CLK_ENB_SDMMC2;
case SDMMC_3:
return CLOCK(CLK_RST_CONTROLLER_CLK_OUT_ENB_U) & U_CLK_ENB_SDMMC3;
case SDMMC_4:
return CLOCK(CLK_RST_CONTROLLER_CLK_OUT_ENB_L) & L_CLK_ENB_SDMMC4;
}
return 0;
}
static void _clock_sdmmc_set_enable(u32 id)
{
switch (id)
{
case SDMMC_1:
CLOCK(CLK_RST_CONTROLLER_CLK_ENB_L_SET) = L_SET_CLK_ENB_SDMMC1;
break;
case SDMMC_2:
CLOCK(CLK_RST_CONTROLLER_CLK_ENB_L_SET) = L_SET_CLK_ENB_SDMMC2;
break;
case SDMMC_3:
CLOCK(CLK_RST_CONTROLLER_CLK_ENB_U_SET) = U_SET_CLK_ENB_SDMMC3;
break;
case SDMMC_4:
CLOCK(CLK_RST_CONTROLLER_CLK_ENB_L_SET) = L_SET_CLK_ENB_SDMMC4;
break;
}
}
static void _clock_sdmmc_clear_enable(u32 id)
{
switch (id)
{
case SDMMC_1:
CLOCK(CLK_RST_CONTROLLER_CLK_ENB_L_CLR) = L_CLR_CLK_ENB_SDMMC1;
break;
case SDMMC_2:
CLOCK(CLK_RST_CONTROLLER_CLK_ENB_L_CLR) = L_CLR_CLK_ENB_SDMMC2;
break;
case SDMMC_3:
CLOCK(CLK_RST_CONTROLLER_CLK_ENB_U_CLR) = U_CLR_CLK_ENB_SDMMC3;
break;
case SDMMC_4:
CLOCK(CLK_RST_CONTROLLER_CLK_ENB_L_CLR) = L_CLR_CLK_ENB_SDMMC4;
break;
}
}
static void _clock_sdmmc_config_legacy_tm()
{
sclock_t *clk = &_clock_sdmmc_legacy_tm;
if (!(CLOCK(clk->enable) & (1 << clk->index)))
clock_enable(clk);
}
typedef struct _clock_sdmmc_t
{
u32 clock;
u32 real_clock;
} clock_sdmmc_t;
static clock_sdmmc_t _clock_sdmmc_table[4] = { 0 };
#define SDMMC_CLOCK_SRC_PLLP_OUT0 0x0
#define SDMMC_CLOCK_SRC_PLLC4_OUT2 0x3
#define SDMMC4_CLOCK_SRC_PLLC4_OUT2_LJ 0x1
static int _clock_sdmmc_config_clock_host(u32 *pclock, u32 id, u32 val)
{
u32 divisor = 0;
u32 source = SDMMC_CLOCK_SRC_PLLP_OUT0;
if (id > SDMMC_4)
return 0;
// Get IO clock divisor.
switch (val)
{
case 25000:
*pclock = 24728;
divisor = 31; // 16.5 div.
break;
case 26000:
*pclock = 25500;
divisor = 30; // 16 div.
break;
case 40800:
*pclock = 40800;
divisor = 18; // 10 div.
break;
case 50000:
*pclock = 48000;
divisor = 15; // 8.5 div.
break;
case 52000:
*pclock = 51000;
divisor = 14; // 8 div.
break;
case 100000:
source = SDMMC_CLOCK_SRC_PLLC4_OUT2;
*pclock = 99840;
divisor = 2; // 2 div.
break;
case 164000:
*pclock = 163200;
divisor = 3; // 2.5 div.
break;
case 200000:
switch (id)
{
case SDMMC_1:
source = SDMMC_CLOCK_SRC_PLLC4_OUT2;
break;
case SDMMC_2:
source = SDMMC4_CLOCK_SRC_PLLC4_OUT2_LJ;
break;
case SDMMC_3:
source = SDMMC_CLOCK_SRC_PLLC4_OUT2;
break;
case SDMMC_4:
source = SDMMC4_CLOCK_SRC_PLLC4_OUT2_LJ;
break;
}
*pclock = 199680;
divisor = 0; // 1 div.
break;
default:
*pclock = 24728;
divisor = 31; // 16.5 div.
}
_clock_sdmmc_table[id].clock = val;
_clock_sdmmc_table[id].real_clock = *pclock;
// PLLC4 and LEGACY_TM clocks are already initialized,
// because we init at the first eMMC read.
// // Enable PLLC4 if in use by any SDMMC.
// if (source)
// _clock_enable_pllc4();
// // Set SDMMC legacy timeout clock.
// _clock_sdmmc_config_legacy_tm();
// Set SDMMC clock.
switch (id)
{
case SDMMC_1:
CLOCK(CLK_RST_CONTROLLER_CLK_SOURCE_SDMMC1) = (source << 29) | divisor;
break;
case SDMMC_2:
CLOCK(CLK_RST_CONTROLLER_CLK_SOURCE_SDMMC2) = (source << 29) | divisor;
break;
case SDMMC_3:
CLOCK(CLK_RST_CONTROLLER_CLK_SOURCE_SDMMC3) = (source << 29) | divisor;
break;
case SDMMC_4:
CLOCK(CLK_RST_CONTROLLER_CLK_SOURCE_SDMMC4) = (source << 29) | divisor;
break;
}
return 1;
}
void clock_sdmmc_config_clock_source(u32 *pclock, u32 id, u32 val)
{
if (_clock_sdmmc_table[id].clock == val)
{
*pclock = _clock_sdmmc_table[id].real_clock;
}
else
{
int is_enabled = _clock_sdmmc_is_enabled(id);
if (is_enabled)
_clock_sdmmc_clear_enable(id);
_clock_sdmmc_config_clock_host(pclock, id, val);
if (is_enabled)
_clock_sdmmc_set_enable(id);
_clock_sdmmc_is_reset(id);
}
}
void clock_sdmmc_get_card_clock_div(u32 *pclock, u16 *pdivisor, u32 type)
{
// Get Card clock divisor.
switch (type)
{
case SDHCI_TIMING_MMC_ID: // Actual IO Freq: 380.59 KHz.
*pclock = 26000;
*pdivisor = 66;
break;
case SDHCI_TIMING_MMC_LS26:
*pclock = 26000;
*pdivisor = 1;
break;
case SDHCI_TIMING_MMC_HS52:
*pclock = 52000;
*pdivisor = 1;
break;
case SDHCI_TIMING_MMC_HS200:
case SDHCI_TIMING_MMC_HS400:
case SDHCI_TIMING_UHS_SDR104:
*pclock = 200000;
*pdivisor = 1;
break;
case SDHCI_TIMING_SD_ID: // Actual IO Freq: 380.43 KHz.
*pclock = 25000;
*pdivisor = 64;
break;
case SDHCI_TIMING_SD_DS12:
case SDHCI_TIMING_UHS_SDR12:
*pclock = 25000;
*pdivisor = 1;
break;
case SDHCI_TIMING_SD_HS25:
case SDHCI_TIMING_UHS_SDR25:
*pclock = 50000;
*pdivisor = 1;
break;
case SDHCI_TIMING_UHS_SDR50:
*pclock = 100000;
*pdivisor = 1;
break;
case SDHCI_TIMING_UHS_SDR82:
*pclock = 164000;
*pdivisor = 1;
break;
case SDHCI_TIMING_UHS_DDR50:
*pclock = 40800;
*pdivisor = 1;
break;
case SDHCI_TIMING_MMC_HS102: // Actual IO Freq: 99.84 MHz.
*pclock = 200000;
*pdivisor = 2;
break;
}
}
int clock_sdmmc_is_not_reset_and_enabled(u32 id)
{
return !_clock_sdmmc_is_reset(id) && _clock_sdmmc_is_enabled(id);
}
void clock_sdmmc_enable(u32 id, u32 val)
{
u32 clock = 0;
if (_clock_sdmmc_is_enabled(id))
_clock_sdmmc_clear_enable(id);
_clock_sdmmc_set_reset(id);
_clock_sdmmc_config_clock_host(&clock, id, val);
_clock_sdmmc_set_enable(id);
_clock_sdmmc_is_reset(id);
usleep((100000 + clock - 1) / clock);
_clock_sdmmc_clear_reset(id);
_clock_sdmmc_is_reset(id);
}
void clock_sdmmc_disable(u32 id)
{
_clock_sdmmc_set_reset(id);
_clock_sdmmc_clear_enable(id);
_clock_sdmmc_is_reset(id);
}