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esp-idf/components/esp_psram/esp32s2/esp_psram_impl_quad.c

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/*
Driver bits for PSRAM chips (at the moment only the ESP-PSRAM32 chip).
*/
/*
* SPDX-FileCopyrightText: 2013-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "sdkconfig.h"
#include "string.h"
#include "esp_attr.h"
#include "esp_err.h"
#include "esp_types.h"
#include "esp_log.h"
#include "../esp_psram_impl.h"
#include "esp32s2/rom/spi_flash.h"
#include "esp32s2/rom/opi_flash.h"
#include "esp32s2/rom/efuse.h"
#include "esp_rom_efuse.h"
#include "soc/spi_reg.h"
#include "soc/io_mux_reg.h"
static const char* TAG = "quad_psram";
//Commands for PSRAM chip
#define PSRAM_READ 0x03
#define PSRAM_FAST_READ 0x0B
#define PSRAM_FAST_READ_DUMMY 0x3
#define PSRAM_FAST_READ_QUAD 0xEB
#define PSRAM_FAST_READ_QUAD_DUMMY 0x5
#define PSRAM_WRITE 0x02
#define PSRAM_QUAD_WRITE 0x38
#define PSRAM_ENTER_QMODE 0x35
#define PSRAM_EXIT_QMODE 0xF5
#define PSRAM_RESET_EN 0x66
#define PSRAM_RESET 0x99
#define PSRAM_SET_BURST_LEN 0xC0
#define PSRAM_DEVICE_ID 0x9F
// ID
#define PSRAM_ID_KGD_M 0xff
#define PSRAM_ID_KGD_S 8
#define PSRAM_ID_KGD 0x5d
#define PSRAM_ID_EID_M 0xff
#define PSRAM_ID_EID_S 16
// Use the [7:5](bit7~bit5) of EID to distinguish the psram size:
//
// BIT7 | BIT6 | BIT5 | SIZE(MBIT)
// -------------------------------------
// 0 | 0 | 0 | 16
// 0 | 0 | 1 | 32
// 0 | 1 | 0 | 64
#define PSRAM_EID_SIZE_M 0x07
#define PSRAM_EID_SIZE_S 5
#define PSRAM_KGD(id) (((id) >> PSRAM_ID_KGD_S) & PSRAM_ID_KGD_M)
#define PSRAM_EID(id) (((id) >> PSRAM_ID_EID_S) & PSRAM_ID_EID_M)
#define PSRAM_SIZE_ID(id) ((PSRAM_EID(id) >> PSRAM_EID_SIZE_S) & PSRAM_EID_SIZE_M)
#define PSRAM_IS_VALID(id) (PSRAM_KGD(id) == PSRAM_ID_KGD)
// For the old version 32Mbit psram, using the spicial driver */
#define PSRAM_IS_32MBIT_VER0(id) (PSRAM_EID(id) == 0x20)
#define PSRAM_IS_64MBIT_TRIAL(id) (PSRAM_EID(id) == 0x26)
// IO-pins for PSRAM.
// WARNING: PSRAM shares all but the CS and CLK pins with the flash, so these defines
// hardcode the flash pins as well, making this code incompatible with either a setup
// that has the flash on non-standard pins or ESP32s with built-in flash.
#define FLASH_CLK_IO SPI_CLK_GPIO_NUM
#define FLASH_CS_IO SPI_CS0_GPIO_NUM
// PSRAM clock and cs IO should be configured based on hardware design.
#define PSRAM_CLK_IO SPI_CLK_GPIO_NUM
#define PSRAM_CS_IO SPI_CS1_GPIO_NUM
#define PSRAM_SPIQ_SD0_IO SPI_Q_GPIO_NUM
#define PSRAM_SPID_SD1_IO SPI_D_GPIO_NUM
#define PSRAM_SPIWP_SD3_IO SPI_WP_GPIO_NUM
#define PSRAM_SPIHD_SD2_IO SPI_HD_GPIO_NUM
#define CS_PSRAM_SEL SPI_MEM_CS1_DIS_M
#define CS_FLASH_SEL SPI_MEM_CS0_DIS_M
#define PSRAM_IO_MATRIX_DUMMY_20M 0
#define PSRAM_IO_MATRIX_DUMMY_40M 0
#define PSRAM_IO_MATRIX_DUMMY_80M 0
#define _SPI_CACHE_PORT 0
#define _SPI_FLASH_PORT 1
#define _SPI_80M_CLK_DIV 1
#define _SPI_40M_CLK_DIV 2
#define _SPI_20M_CLK_DIV 4
typedef enum {
PSRAM_CLK_MODE_NORM = 0, /*!< Normal SPI mode */
PSRAM_CLK_MODE_A1C, /*!< ONE extra clock cycles after CS is set high level */
PSRAM_CLK_MODE_A2C, /*!< Two extra clock cycles after CS is set high level */
PSRAM_CLK_MODE_ALON, /*!< clock always on */
PSRAM_CLK_MODE_MAX,
} psram_clk_mode_t;
typedef enum {
PSRAM_EID_SIZE_16MBITS = 0,
PSRAM_EID_SIZE_32MBITS = 1,
PSRAM_EID_SIZE_64MBITS = 2,
} psram_eid_size_t;
typedef struct {
uint8_t flash_clk_io;
uint8_t flash_cs_io;
uint8_t psram_clk_io;
uint8_t psram_cs_io;
uint8_t psram_spiq_sd0_io;
uint8_t psram_spid_sd1_io;
uint8_t psram_spiwp_sd3_io;
uint8_t psram_spihd_sd2_io;
} psram_io_t;
#define PSRAM_IO_CONF_DEFAULT() { \
.flash_clk_io = FLASH_CLK_IO, \
.flash_cs_io = FLASH_CS_IO, \
.psram_clk_io = PSRAM_CLK_IO, \
.psram_cs_io = PSRAM_CS_IO, \
.psram_spiq_sd0_io = PSRAM_SPIQ_SD0_IO, \
.psram_spid_sd1_io = PSRAM_SPID_SD1_IO, \
.psram_spiwp_sd3_io = PSRAM_SPIWP_SD3_IO, \
.psram_spihd_sd2_io = PSRAM_SPIHD_SD2_IO, \
}
typedef enum {
PSRAM_SPI_1 = 0x1,
/* PSRAM_SPI_2, */
/* PSRAM_SPI_3, */
PSRAM_SPI_MAX ,
} psram_spi_num_t;
typedef enum {
PSRAM_CMD_QPI,
PSRAM_CMD_SPI,
} psram_cmd_mode_t;
typedef enum {
PSRAM_CACHE_S80M = 1,
PSRAM_CACHE_S40M,
PSRAM_CACHE_S26M,
PSRAM_CACHE_S20M,
PSRAM_CACHE_MAX,
} psram_cache_speed_t;
#if CONFIG_SPIRAM_SPEED_40M
#define PSRAM_SPEED PSRAM_CACHE_S40M
#elif CONFIG_SPIRAM_SPEED_80M
#define PSRAM_SPEED PSRAM_CACHE_S80M
#else
#define PSRAM_SPEED PSRAM_CACHE_S20M
#endif
typedef esp_rom_spi_cmd_t psram_cmd_t;
static uint32_t s_psram_id = 0;
static void psram_cache_init(psram_cache_speed_t psram_cache_mode, psram_vaddr_mode_t vaddrmode);
extern void esp_rom_spi_set_op_mode(int spi_num, esp_rom_spiflash_read_mode_t mode);
static uint8_t s_psram_cs_io = (uint8_t)-1;
uint8_t esp_psram_impl_get_cs_io(void)
{
return s_psram_cs_io;
}
static void psram_set_op_mode(int spi_num, psram_cmd_mode_t mode)
{
if (mode == PSRAM_CMD_QPI) {
esp_rom_spi_set_op_mode(spi_num, ESP_ROM_SPIFLASH_QIO_MODE);
SET_PERI_REG_MASK(SPI_MEM_CTRL_REG(spi_num), SPI_MEM_FCMD_QUAD_M);
} else if (mode == PSRAM_CMD_SPI) {
esp_rom_spi_set_op_mode(spi_num, ESP_ROM_SPIFLASH_SLOWRD_MODE);
}
}
static void _psram_exec_cmd(int spi_num,
uint32_t cmd, int cmd_bit_len,
uint32_t addr, int addr_bit_len,
int dummy_bits,
uint8_t* mosi_data, int mosi_bit_len,
uint8_t* miso_data, int miso_bit_len)
{
esp_rom_spi_cmd_t conf;
uint32_t _addr = addr;
conf.addr = &_addr;
conf.addrBitLen = addr_bit_len;
conf.cmd = cmd;
conf.cmdBitLen = cmd_bit_len;
conf.dummyBitLen = dummy_bits; // There is a hardware approach on chip723
conf.txData = (uint32_t*) mosi_data;
conf.txDataBitLen = mosi_bit_len;
conf.rxData = (uint32_t*) miso_data;
conf.rxDataBitLen = miso_bit_len;
esp_rom_spi_cmd_config(spi_num, &conf);
}
void psram_exec_cmd(int spi_num, psram_cmd_mode_t mode,
uint32_t cmd, int cmd_bit_len,
uint32_t addr, int addr_bit_len,
int dummy_bits,
uint8_t* mosi_data, int mosi_bit_len,
uint8_t* miso_data, int miso_bit_len,
uint32_t cs_mask,
bool is_write_erase_operation)
{
uint32_t backup_usr = READ_PERI_REG(SPI_MEM_USER_REG(spi_num));
uint32_t backup_usr1 = READ_PERI_REG(SPI_MEM_USER1_REG(spi_num));
uint32_t backup_usr2 = READ_PERI_REG(SPI_MEM_USER2_REG(spi_num));
uint32_t backup_ctrl = READ_PERI_REG(SPI_MEM_CTRL_REG(spi_num));
psram_set_op_mode(spi_num, mode);
_psram_exec_cmd(spi_num, cmd, cmd_bit_len, addr, addr_bit_len,
dummy_bits, mosi_data, mosi_bit_len, miso_data, miso_bit_len);
esp_rom_spi_cmd_start(spi_num, miso_data, miso_bit_len / 8, cs_mask, is_write_erase_operation);
WRITE_PERI_REG(SPI_MEM_USER_REG(spi_num), backup_usr);
WRITE_PERI_REG(SPI_MEM_USER1_REG(spi_num), backup_usr1);
WRITE_PERI_REG(SPI_MEM_USER2_REG(spi_num), backup_usr2);
WRITE_PERI_REG(SPI_MEM_CTRL_REG(spi_num), backup_ctrl);
}
//exit QPI mode(set back to SPI mode)
static void psram_disable_qio_mode(int spi_num)
{
psram_exec_cmd(spi_num, PSRAM_CMD_QPI,
PSRAM_EXIT_QMODE, 8, /* command and command bit len*/
0, 0, /* address and address bit len*/
0, /* dummy bit len */
NULL, 0, /* tx data and tx bit len*/
NULL, 0, /* rx data and rx bit len*/
CS_PSRAM_SEL, /* cs bit mask*/
false); /* whether is program/erase operation */
}
//switch psram burst length(32 bytes or 1024 bytes)
//datasheet says it should be 1024 bytes by default
static void psram_set_wrap_burst_length(int spi_num, psram_cmd_mode_t mode)
{
psram_exec_cmd(spi_num, mode,
PSRAM_SET_BURST_LEN, 8, /* command and command bit len*/
0, 0, /* address and address bit len*/
0, /* dummy bit len */
NULL, 0, /* tx data and tx bit len*/
NULL, 0, /* rx data and rx bit len*/
CS_PSRAM_SEL, /* cs bit mask*/
false); /* whether is program/erase operation */
}
//send reset command to psram, in spi mode
static void psram_reset_mode(int spi_num)
{
psram_exec_cmd(spi_num, PSRAM_CMD_SPI,
PSRAM_RESET_EN, 8, /* command and command bit len*/
0, 0, /* address and address bit len*/
0, /* dummy bit len */
NULL, 0, /* tx data and tx bit len*/
NULL, 0, /* rx data and rx bit len*/
CS_PSRAM_SEL, /* cs bit mask*/
false); /* whether is program/erase operation */
psram_exec_cmd(spi_num, PSRAM_CMD_SPI,
PSRAM_RESET, 8, /* command and command bit len*/
0, 0, /* address and address bit len*/
0, /* dummy bit len */
NULL, 0, /* tx data and tx bit len*/
NULL, 0, /* rx data and rx bit len*/
CS_PSRAM_SEL, /* cs bit mask*/
false); /* whether is program/erase operation */
}
esp_err_t psram_enable_wrap(uint32_t wrap_size)
{
static uint32_t current_wrap_size = 0;
if (current_wrap_size == wrap_size) {
return ESP_OK;
}
switch (wrap_size) {
case 32:
case 0:
psram_set_wrap_burst_length(PSRAM_SPI_1, PSRAM_CMD_QPI);
current_wrap_size = wrap_size;
return ESP_OK;
case 16:
case 64:
default:
return ESP_FAIL;
}
}
bool psram_support_wrap_size(uint32_t wrap_size)
{
switch (wrap_size) {
case 0:
case 32:
return true;
case 16:
case 64:
default:
return false;
}
}
//read psram id, should issue `psram_disable_qio_mode` before calling this
static void psram_read_id(int spi_num, uint32_t* dev_id)
{
psram_exec_cmd(spi_num, PSRAM_CMD_SPI,
PSRAM_DEVICE_ID, 8, /* command and command bit len*/
0, 24, /* address and address bit len*/
0, /* dummy bit len */
NULL, 0, /* tx data and tx bit len*/
(uint8_t*) dev_id, 24, /* rx data and rx bit len*/
CS_PSRAM_SEL, /* cs bit mask*/
false); /* whether is program/erase operation */
}
//enter QPI mode
static void IRAM_ATTR psram_enable_qio_mode(int spi_num)
{
psram_exec_cmd(spi_num, PSRAM_CMD_SPI,
PSRAM_ENTER_QMODE, 8, /* command and command bit len*/
0, 0, /* address and address bit len*/
0, /* dummy bit len */
NULL, 0, /* tx data and tx bit len*/
NULL, 0, /* rx data and rx bit len*/
CS_PSRAM_SEL, /* cs bit mask*/
false); /* whether is program/erase operation */
}
static void psram_set_spi1_cmd_cs_timing(psram_clk_mode_t clk_mode)
{
if (clk_mode == PSRAM_CLK_MODE_NORM) {
// SPI1 Flash Operation port
SET_PERI_REG_BITS(SPI_MEM_CTRL2_REG(_SPI_FLASH_PORT), SPI_MEM_CS_HOLD_TIME_V, 1, SPI_MEM_CS_HOLD_TIME_S);
SET_PERI_REG_BITS(SPI_MEM_CTRL2_REG(_SPI_FLASH_PORT), SPI_MEM_CS_SETUP_TIME_V, 0, SPI_MEM_CS_SETUP_TIME_S);
SET_PERI_REG_MASK(SPI_MEM_USER_REG(_SPI_FLASH_PORT), SPI_MEM_CS_HOLD_M | SPI_MEM_CS_SETUP_M);
} else {
SET_PERI_REG_MASK(SPI_MEM_USER_REG(_SPI_FLASH_PORT), SPI_MEM_CS_HOLD_M | SPI_MEM_CS_SETUP_M);
}
}
static void psram_set_spi0_cache_cs_timing(psram_clk_mode_t clk_mode)
{
if (clk_mode == PSRAM_CLK_MODE_NORM) {
// SPI0 SRAM Cache port
SET_PERI_REG_BITS(SPI_MEM_SPI_SMEM_AC_REG(_SPI_CACHE_PORT), SPI_MEM_SPI_SMEM_CS_HOLD_TIME_V, 1, SPI_MEM_SPI_SMEM_CS_HOLD_TIME_S);
SET_PERI_REG_BITS(SPI_MEM_SPI_SMEM_AC_REG(_SPI_CACHE_PORT), SPI_MEM_SPI_SMEM_CS_SETUP_TIME_V, 0, SPI_MEM_SPI_SMEM_CS_SETUP_TIME_S);
SET_PERI_REG_MASK(SPI_MEM_SPI_SMEM_AC_REG(_SPI_CACHE_PORT), SPI_MEM_SPI_SMEM_CS_HOLD_M | SPI_MEM_SPI_SMEM_CS_SETUP_M);
// SPI0 Flash Cache port
SET_PERI_REG_BITS(SPI_MEM_CTRL2_REG(_SPI_CACHE_PORT), SPI_MEM_CS_HOLD_TIME_V, 0, SPI_MEM_CS_HOLD_TIME_S);
SET_PERI_REG_BITS(SPI_MEM_CTRL2_REG(_SPI_CACHE_PORT), SPI_MEM_CS_SETUP_TIME_V, 0, SPI_MEM_CS_SETUP_TIME_S);
SET_PERI_REG_MASK(SPI_MEM_USER_REG(_SPI_CACHE_PORT), SPI_MEM_CS_HOLD_M | SPI_MEM_CS_SETUP_M);
} else {
CLEAR_PERI_REG_MASK(SPI_MEM_USER_REG(_SPI_CACHE_PORT), SPI_CS_HOLD_M | SPI_CS_SETUP_M);
}
}
//psram gpio init , different working frequency we have different solutions
static void IRAM_ATTR psram_gpio_config(psram_cache_speed_t mode)
{
psram_io_t psram_io = PSRAM_IO_CONF_DEFAULT();
const uint32_t spiconfig = esp_rom_efuse_get_flash_gpio_info();
if (spiconfig == ESP_ROM_EFUSE_FLASH_DEFAULT_SPI) {
/* FLASH pins(except wp / hd) are all configured via IO_MUX in rom. */
} else {
// FLASH pins are all configured via GPIO matrix in ROM.
psram_io.flash_clk_io = EFUSE_SPICONFIG_RET_SPICLK(spiconfig);
psram_io.flash_cs_io = EFUSE_SPICONFIG_RET_SPICS0(spiconfig);
psram_io.psram_spiq_sd0_io = EFUSE_SPICONFIG_RET_SPIQ(spiconfig);
psram_io.psram_spid_sd1_io = EFUSE_SPICONFIG_RET_SPID(spiconfig);
psram_io.psram_spihd_sd2_io = EFUSE_SPICONFIG_RET_SPIHD(spiconfig);
psram_io.psram_spiwp_sd3_io = esp_rom_efuse_get_flash_wp_gpio();
}
esp_rom_spiflash_select_qio_pins(psram_io.psram_spiwp_sd3_io, spiconfig);
s_psram_cs_io = psram_io.psram_cs_io;
}
//used in UT only
bool psram_is_32mbit_ver0(void)
{
return PSRAM_IS_32MBIT_VER0(s_psram_id);
}
static void psram_set_clk_mode(int spi_num, psram_clk_mode_t clk_mode)
{
if (spi_num == _SPI_CACHE_PORT) {
REG_SET_FIELD(SPI_MEM_SRAM_CMD_REG(0), SPI_MEM_SCLK_MODE, clk_mode);
} else if (spi_num == _SPI_FLASH_PORT) {
REG_SET_FIELD(SPI_MEM_CTRL1_REG(1), SPI_MEM_CLK_MODE, clk_mode);
}
}
/*
* Psram mode init will overwrite original flash speed mode, so that it is possible to change psram and flash speed after OTA.
* Flash read mode(QIO/QOUT/DIO/DOUT) will not be changed in app bin. It is decided by bootloader, OTA can not change this mode.
*/
esp_err_t IRAM_ATTR esp_psram_impl_enable(psram_vaddr_mode_t vaddrmode) //psram init
{
psram_cache_speed_t mode = PSRAM_SPEED;
assert(mode < PSRAM_CACHE_MAX && "we don't support any other mode for now.");
// GPIO related settings
psram_gpio_config(mode);
/* SPI1: set spi1 clk mode, in order to send commands on SPI1 */
/* SPI1: set cs timing(hold time) in order to send commands on SPI1 */
psram_set_clk_mode(_SPI_FLASH_PORT, PSRAM_CLK_MODE_A1C);
psram_set_spi1_cmd_cs_timing(PSRAM_CLK_MODE_A1C);
int spi_num = PSRAM_SPI_1;
psram_disable_qio_mode(spi_num);
psram_read_id(spi_num, &s_psram_id);
if (!PSRAM_IS_VALID(s_psram_id)) {
/* 16Mbit psram ID read error workaround:
* treat the first read id as a dummy one as the pre-condition,
* Send Read ID command again
*/
psram_read_id(spi_num, &s_psram_id);
if (!PSRAM_IS_VALID(s_psram_id)) {
ESP_EARLY_LOGE(TAG, "PSRAM ID read error: 0x%08x", s_psram_id);
return ESP_FAIL;
}
}
psram_clk_mode_t clk_mode = PSRAM_CLK_MODE_MAX;
if (psram_is_32mbit_ver0()) {
clk_mode = PSRAM_CLK_MODE_A1C;
// SPI1: keep clock mode and cs timing for spi1
} else {
// For other psram, we don't need any extra clock cycles after cs get back to high level
clk_mode = PSRAM_CLK_MODE_NORM;
// SPI1: set clock mode and cs timing to normal mode
psram_set_clk_mode(_SPI_FLASH_PORT, PSRAM_CLK_MODE_NORM);
psram_set_spi1_cmd_cs_timing(PSRAM_CLK_MODE_NORM);
}
/* SPI1: send psram reset command */
/* SPI1: send QPI enable command */
psram_reset_mode(PSRAM_SPI_1);
psram_enable_qio_mode(PSRAM_SPI_1);
// after sending commands, set spi1 clock mode and cs timing to normal mode.
// since all the operations are sent via SPI0 Cache
/* SPI1: set clock mode to normal mode. */
/* SPI1: set cs timing to normal */
psram_set_clk_mode(_SPI_FLASH_PORT, PSRAM_CLK_MODE_NORM);
psram_set_spi1_cmd_cs_timing(PSRAM_CLK_MODE_NORM);
/* SPI0: set spi0 clock mode */
/* SPI0: set spi0 flash/cache cs timing */
psram_set_clk_mode(_SPI_CACHE_PORT, clk_mode);
psram_set_spi0_cache_cs_timing(clk_mode);
// SPI0: init SPI commands for Cache
psram_cache_init(mode, vaddrmode);
return ESP_OK;
}
static void IRAM_ATTR psram_clock_set(int spi_num, int8_t freqdiv)
{
uint32_t freqbits;
if (1 >= freqdiv) {
WRITE_PERI_REG(SPI_MEM_SRAM_CLK_REG(spi_num), SPI_MEM_SCLK_EQU_SYSCLK);
} else {
freqbits = (((freqdiv-1)<<SPI_MEM_SCLKCNT_N_S)) | (((freqdiv/2-1)<<SPI_MEM_SCLKCNT_H_S)) | ((freqdiv-1)<<SPI_MEM_SCLKCNT_L_S);
WRITE_PERI_REG(SPI_MEM_SRAM_CLK_REG(spi_num), freqbits);
}
}
//register initialization for sram cache params and r/w commands
static void IRAM_ATTR psram_cache_init(psram_cache_speed_t psram_cache_mode, psram_vaddr_mode_t vaddrmode)
{
int extra_dummy = 0;
switch (psram_cache_mode) {
case PSRAM_CACHE_S80M:
psram_clock_set(0, 1);
extra_dummy = PSRAM_IO_MATRIX_DUMMY_80M;
break;
case PSRAM_CACHE_S40M:
psram_clock_set(0, 2);
extra_dummy = PSRAM_IO_MATRIX_DUMMY_40M;
break;
case PSRAM_CACHE_S26M:
psram_clock_set(0, 3);
extra_dummy = PSRAM_IO_MATRIX_DUMMY_20M;
break;
case PSRAM_CACHE_S20M:
psram_clock_set(0, 4);
extra_dummy = PSRAM_IO_MATRIX_DUMMY_20M;
break;
default:
psram_clock_set(0, 2);
break;
}
CLEAR_PERI_REG_MASK(SPI_MEM_CACHE_SCTRL_REG(0), SPI_MEM_USR_SRAM_DIO_M); //disable dio mode for cache command
SET_PERI_REG_MASK(SPI_MEM_CACHE_SCTRL_REG(0), SPI_MEM_USR_SRAM_QIO_M); //enable qio mode for cache command
SET_PERI_REG_MASK(SPI_MEM_CACHE_SCTRL_REG(0), SPI_MEM_CACHE_SRAM_USR_RCMD_M); //enable cache read command
SET_PERI_REG_MASK(SPI_MEM_CACHE_SCTRL_REG(0), SPI_MEM_CACHE_SRAM_USR_WCMD_M); //enable cache write command
SET_PERI_REG_BITS(SPI_MEM_CACHE_SCTRL_REG(0), SPI_MEM_SRAM_ADDR_BITLEN_V, 23, SPI_MEM_SRAM_ADDR_BITLEN_S); //write address for cache command.
SET_PERI_REG_MASK(SPI_MEM_CACHE_SCTRL_REG(0), SPI_MEM_USR_RD_SRAM_DUMMY_M); //enable cache read dummy
//config sram cache r/w command
SET_PERI_REG_BITS(SPI_MEM_SRAM_DWR_CMD_REG(0), SPI_MEM_CACHE_SRAM_USR_WR_CMD_BITLEN, 7,
SPI_MEM_CACHE_SRAM_USR_WR_CMD_BITLEN_S);
SET_PERI_REG_BITS(SPI_MEM_SRAM_DWR_CMD_REG(0), SPI_MEM_CACHE_SRAM_USR_WR_CMD_VALUE, PSRAM_QUAD_WRITE,
SPI_MEM_CACHE_SRAM_USR_WR_CMD_VALUE_S); //0x38
SET_PERI_REG_BITS(SPI_MEM_SRAM_DRD_CMD_REG(0), SPI_MEM_CACHE_SRAM_USR_RD_CMD_BITLEN_V, 7,
SPI_MEM_CACHE_SRAM_USR_RD_CMD_BITLEN_S);
SET_PERI_REG_BITS(SPI_MEM_SRAM_DRD_CMD_REG(0), SPI_MEM_CACHE_SRAM_USR_RD_CMD_VALUE_V, PSRAM_FAST_READ_QUAD,
SPI_MEM_CACHE_SRAM_USR_RD_CMD_VALUE_S); //0x0b
SET_PERI_REG_BITS(SPI_MEM_CACHE_SCTRL_REG(0), SPI_MEM_SRAM_RDUMMY_CYCLELEN_V, PSRAM_FAST_READ_QUAD_DUMMY + extra_dummy,
SPI_MEM_SRAM_RDUMMY_CYCLELEN_S); //dummy, psram cache : 40m--+1dummy,80m--+2dummy
#if !CONFIG_FREERTOS_UNICORE
DPORT_CLEAR_PERI_REG_MASK(DPORT_PRO_CACHE_CTRL_REG, DPORT_PRO_DRAM_HL|DPORT_PRO_DRAM_SPLIT);
DPORT_CLEAR_PERI_REG_MASK(DPORT_APP_CACHE_CTRL_REG, DPORT_APP_DRAM_HL|DPORT_APP_DRAM_SPLIT);
if (vaddrmode == PSRAM_VADDR_MODE_LOWHIGH) {
DPORT_SET_PERI_REG_MASK(DPORT_PRO_CACHE_CTRL_REG, DPORT_PRO_DRAM_HL);
DPORT_SET_PERI_REG_MASK(DPORT_APP_CACHE_CTRL_REG, DPORT_APP_DRAM_HL);
} else if (vaddrmode == PSRAM_VADDR_MODE_EVENODD) {
DPORT_SET_PERI_REG_MASK(DPORT_PRO_CACHE_CTRL_REG, DPORT_PRO_DRAM_SPLIT);
DPORT_SET_PERI_REG_MASK(DPORT_APP_CACHE_CTRL_REG, DPORT_APP_DRAM_SPLIT);
}
#endif
CLEAR_PERI_REG_MASK(SPI_MEM_MISC_REG(0), SPI_MEM_CS1_DIS_M); //ENABLE SPI0 CS1 TO PSRAM(CS0--FLASH; CS1--SRAM)
}
/*---------------------------------------------------------------------------------
* Following APIs are not required to be IRAM-Safe
*
* Consider moving these to another file if this kind of APIs grows dramatically
*-------------------------------------------------------------------------------*/
esp_err_t esp_psram_impl_get_physical_size(uint32_t *out_size_bytes)
{
if (!out_size_bytes) {
return ESP_ERR_INVALID_ARG;
}
if ((PSRAM_SIZE_ID(s_psram_id) == PSRAM_EID_SIZE_64MBITS) || PSRAM_IS_64MBIT_TRIAL(s_psram_id)) {
*out_size_bytes = PSRAM_SIZE_8MB;
} else if (PSRAM_SIZE_ID(s_psram_id) == PSRAM_EID_SIZE_32MBITS) {
*out_size_bytes = PSRAM_SIZE_4MB;
} else if (PSRAM_SIZE_ID(s_psram_id) == PSRAM_EID_SIZE_16MBITS) {
*out_size_bytes = PSRAM_SIZE_2MB;
} else {
return ESP_ERR_NOT_SUPPORTED;
}
return ESP_OK;
}
/**
* This function is to get the available physical psram size in bytes.
* On ESP32S2, all of the PSRAM physical region are available
*/
esp_err_t esp_psram_impl_get_available_size(uint32_t *out_size_bytes)
{
return esp_psram_impl_get_physical_size(out_size_bytes);
}
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