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#include <stdint.h>
#include <stdbool.h>

#include "plf.h"
#include "driver_system.h"
#include "driver_psram.h"

#include "co_log.h"
#include "co_printf.h"
#include "driver_gpio.h"
#include "sys_utils.h"
#include "bsp_psram.h"

#undef LOG_LOCAL_LEVEL
#define LOG_LOCAL_LEVEL (LOG_LEVEL_INFO)
static const char *psram_tag = "psram";

#define PSRAM_BASE QSPI1_DAC_ADDRESS

extern void psram_reset(void);
extern void psram_set_delay(uint8_t d);
extern void psram_set_ahb_trigger(uint32_t addr);
extern void psram_set_frame(uint8_t r_op, uint8_t r_it, uint8_t r_at, uint8_t r_dt, uint8_t r_dummy,
uint8_t w_op, uint8_t w_at, uint8_t w_dt, uint8_t w_dummy);

static void psram_pins_qspi0(void)
{
system_set_port_mux(GPIO_PORT_C, GPIO_BIT_0, PORTC0_FUNC_QSPI0_IO3);
system_set_port_mux(GPIO_PORT_C, GPIO_BIT_1, PORTC1_FUNC_QSPI0_SCLK0);
system_set_port_mux(GPIO_PORT_C, GPIO_BIT_2, PORTC2_FUNC_QSPI0_CSN0);
system_set_port_mux(GPIO_PORT_C, GPIO_BIT_3, PORTC3_FUNC_QSPI0_IO1);
system_set_port_mux(GPIO_PORT_C, GPIO_BIT_4, PORTC4_FUNC_QSPI0_IO2);
system_set_port_mux(GPIO_PORT_C, GPIO_BIT_5, PORTC5_FUNC_QSPI0_IO0);
}

static void psram_lines_gpio_check(void)
{
GPIO_InitTypeDef io;
__SYSTEM_GPIO_CLK_ENABLE();

LOG_INFO(psram_tag, "line check: PORTC mux=%08x", system_regs->port_mux[2]);

for (uint8_t pin = 0; pin < 6; pin++)
{
    system_set_port_mux(GPIO_PORT_C, pin, PORT_FUNC_GPIO);
    io.Mode = GPIO_MODE_INPUT;
    io.Pull = GPIO_PULLUP;
    io.Pin  = (GPIO_PIN_0 << pin);
    gpio_init(GPIO_C, &io);
    co_delay_100us(1); 
    uint8_t up = gpio_read_pin(GPIO_C, (GPIO_PIN_0 << pin)) ? 1 : 0;

    io.Pull = GPIO_PULLDOWN;
    gpio_init(GPIO_C, &io);
    co_delay_100us(1);
    uint8_t dn = gpio_read_pin(GPIO_C, (GPIO_PIN_0 << pin)) ? 1 : 0;

    co_printf("psram line PC%d: pullup=%d pulldown=%d %s\r\n", pin, up, dn,
              (up == 1 && dn == 0) ? "ok" : "!!");
}

io.Mode = GPIO_MODE_INPUT;
io.Pin  = GPIO_PIN_2;
io.Pull = GPIO_PULLUP;
gpio_init(GPIO_D, &io);
uint8_t cup = gpio_read_pin(GPIO_D, GPIO_PIN_2) ? 1 : 0;
io.Pull = GPIO_PULLDOWN;
gpio_init(GPIO_D, &io);
uint8_t cdn = gpio_read_pin(GPIO_D, GPIO_PIN_2) ? 1 : 0;
co_printf("psram ctrl PD2: pullup=%d pulldown=%d\r\n", cup, cdn);

}

bool bsp_psram_init(void)
{
co_delay_100us(500);

psram_lines_gpio_check(); 

__SYSTEM_GPIO_CLK_ENABLE();
/* 参考例程(lvgl_knob_open_demo)同款参考时钟配置 */
system_regs->mdm_qspi_cfg.qspi_ref_128m_en = 1;
system_regs->mdm_qspi_cfg.qspi_ref_clk_sel = 1;
system_set_internal_flash_clock_div(1); 

psram_pins_qspi0();

(void)psram_init(PSRAM_CLK_SEL_COREH_96M);
system_regs->mdm_qspi_cfg.qspi0_ref_clk_en = 1;
system_regs->mdm_qspi_cfg.qspi0_hclk_en = 1;
psram_set_ahb_trigger(PSRAM_BASE);

volatile uint8_t *img = (volatile uint8_t *)PSRAM_BASE;

for (int attempt = 0; attempt < 3; attempt++)
{
    psram_reset();
    co_delay_100us(10);
    psram_set_frame(0x03, 0, 0, 0, 0, 0x02, 0, 0, 0);
    img[0] = 0x5Au;
    img[1] = 0xA5u;
    co_delay_100us(1);

    for (int d = 0; d < 16; d++)
    {
        psram_set_delay((uint8_t)d);
        co_delay_100us(1);
        if (img[0] == 0x5Au && img[1] == 0xA5u)
        {
            psram_set_delay((uint8_t)d);
            LOG_INFO(psram_tag, "psram ready (spi, delay tap %d)", d);
            return true;
        }
    }
    LOG_INFO(psram_tag, "spi scan fail attempt %d, retry", attempt);
}

LOG_INFO(psram_tag, "psram init FAIL (spi x3)");
return false;

}

#include <stdint.h>
#include <string.h>

#include "plf.h"
#include "driver_qspi.h"
#include "driver_psram.h"
#include "driver_system.h"
#include "driver_pmu.h"
#include "driver_cache.h"

#include "co_printf.h"
#include "sys_utils.h"

#ifdef INLINE
#undef INLINE
#endif
#define INLINE

#define PSRAM_ENABLE_Q_MODE 1 /* TEST: all-quad framing at slow clock */
#define PSRAM_CLK_DIV_SEL QSPI_BAUDRATE_DIV_2
#define PSRAM_BASE QSPI1_DAC_ADDRESS

#define PSRAM_READ_IDENTIFICATION 0x9F

#define PSRAM_READ_OPCODE 0x03
#define PSRAM_FAST_READ_OPCODE 0x0B
#define PSRAM_FAST_QUAL_READ_OPCODE 0xEB

#define PSRAM_PAGE_PROGRAM_OPCODE 0x02
#define PSRAM_PAGE_QUAL_PROGRAM_OPCODE 0x38

#define PSRAM_ENTER_QUAD_MODE_OPCODE 0x35
#define PSRAM_EXIT_QUAD_MODE_OPCODE 0xF5

#define PSRAM_RESET_ENABLE_OPCODE 0x66
#define PSRAM_RESET_OPCODE 0x99

#define QSPI0_STIG_MAX_SINGLE_LEN 8
#define QSPI0_STIG_BANK_DEPTH 128

#define QSPI0_HIGH_SPEED 1
uint8_t psram_delay = 0xFF;
static const struct qspi_stig_reg_t psram_read_id_cmd = {
.enable_bank = 0,
.dummy_cycles = 0,
.write_bytes = 0,
.enable_write = 0,
.addr_bytes = 0,
.enable_mode = 0,
.enable_cmd_addr = 0,
.read_bytes = 3,
.enable_read = 1,
.opcode = PSRAM_READ_IDENTIFICATION,
};

static const struct qspi_stig_reg_t enter_quad_mode_cmd = {
.enable_bank = 0,
.dummy_cycles = 0,
.write_bytes = 0,
.enable_write = 0,
.addr_bytes = 0,
.enable_mode = 0,
.enable_cmd_addr = 0,
.read_bytes = 0,
.enable_read = 0,
.opcode = PSRAM_ENTER_QUAD_MODE_OPCODE,
};

static const struct qspi_stig_reg_t reset_enable_cmd = {
.enable_bank = 0,
.dummy_cycles = 0,
.write_bytes = 0,
.enable_write = 0,
.addr_bytes = 0,
.enable_mode = 0,
.enable_cmd_addr = 0,
.read_bytes = 0,
.enable_read = 0,
.opcode = PSRAM_RESET_ENABLE_OPCODE,
};

static const struct qspi_stig_reg_t reset_cmd = {
.enable_bank = 0,
.dummy_cycles = 0,
.write_bytes = 0,
.enable_write = 0,
.addr_bytes = 0,
.enable_mode = 0,
.enable_cmd_addr = 0,
.read_bytes = 0,
.enable_read = 0,
.opcode = PSRAM_RESET_OPCODE,
};

//static const struct qspi_stig_reg_t exit_quad_mode_cmd = {
// .enable_bank = 0,
// .dummy_cycles = 0,
// .write_bytes = 0,
// .enable_write = 0,
// .addr_bytes = 0,
// .enable_mode = 0,
// .enable_cmd_addr = 0,
// .read_bytes = 0,
// .enable_read = 0,
// .opcode = PSRAM_EXIT_QUAD_MODE_OPCODE,
//};

volatile struct qspi_regs_t *qspi0_ctrl = (volatile struct qspi_regs_t *)QSPI0_APB_BASE;

INLINE void qspi0_cfg_set_enable(uint8_t en)
{
qspi0_ctrl->config.enable = en;
}

INLINE void qspi0_cfg_set_cpol(uint8_t high)
{
qspi0_ctrl->config.cpol = high;
}

INLINE void qspi0_cfg_set_cpha(uint8_t rising)
{
qspi0_ctrl->config.cpha = rising;
}

INLINE void qspi0_cfg_set_hold(uint8_t hold)
{
qspi0_ctrl->config.hold_pin = hold;
}

INLINE void qspi0_cfg_set_reset(uint8_t reset)
{
qspi0_ctrl->config.reset_pin = reset;
}

INLINE void qspi0_cfg_set_reset_sel(uint8_t dedicated)
{
qspi0_ctrl->config.reset_pin_conf = dedicated;
}

INLINE void qspi0_cfg_set_enable_dac(uint8_t en)
{
qspi0_ctrl->config.enable_DAC = en;
}

INLINE void qspi0_cfg_set_enable_legacy(uint8_t en)
{
qspi0_ctrl->config.enable_legacy = en;
}

INLINE void qspi0_cfg_set_write_protect(uint8_t wp)
{
qspi0_ctrl->config.write_en_pin = wp;
}

INLINE void qspi0_cfg_set_enable_remap(uint8_t en)
{
qspi0_ctrl->config.enable_AHB_remap = en;
}

static void qspi0_cfg_set_baudrate(uint8_t baudrate);

INLINE void qspi0_cfg_set_enable_AHB_decoder(uint8_t en)
{
qspi0_ctrl->config.enable_AHB_decoder = en;
}

INLINE int qspi0_is_busy(void)
{
return (qspi0_ctrl->config.status == 0);
}

INLINE void qspi0_read_set_opcode(uint8_t opcode)
{
qspi0_ctrl->read_conf.opcode_no_XIP = opcode;
}

INLINE void qspi0_read_set_instruction_type(uint8_t type)
{
qspi0_ctrl->read_conf.instruction_type = type;
}

INLINE void qspi0_read_set_address_type(uint8_t type)
{
qspi0_ctrl->read_conf.addr_type = type;
}

INLINE void qspi0_read_set_data_type(uint8_t type)
{
qspi0_ctrl->read_conf.data_type = type;
}

INLINE void qspi0_read_set_mode_en(uint8_t en)
{
qspi0_ctrl->read_conf.enable_mode = en;
}

INLINE void qspi0_read_set_dummy_cycles(uint8_t cycles)
{
qspi0_ctrl->read_conf.dummy_cycles = cycles;
}

INLINE void qspi0_write_set_opcode(uint8_t opcode)
{
qspi0_ctrl->write_conf.opcode = opcode;
}

INLINE void qspi0_write_set_wel_dis(uint8_t disable)
{
qspi0_ctrl->write_conf.disable_WEL = disable;
}

INLINE void qspi0_write_set_address_type(uint8_t type)
{
qspi0_ctrl->write_conf.addr_type = type;
}

INLINE void qspi0_write_set_data_type(uint8_t type)
{
qspi0_ctrl->write_conf.data_type = type;
}

INLINE void qspi0_write_set_dummy_cycles(uint8_t cycles)
{
qspi0_ctrl->write_conf.dummy_cycles = cycles;
}

INLINE void qspi0_set_remap_address(uint32_t address)
{
qspi0_ctrl->remap_address = address;
}

INLINE void qspi0_set_mode_bit(uint8_t mode)
{
qspi0_ctrl->mode_bits = (uint32_t)mode;
}

INLINE void qspi0_poll_set_opcode(uint8_t opcode)
{
qspi0_ctrl->poll_cfg.opcode_poll = opcode;
}

INLINE void qspi0_poll_set_bit_index(uint8_t index)
{
qspi0_ctrl->poll_cfg.poll_bit_index = index;
}

INLINE void qspi0_poll_set_polarity(uint8_t pol)
{
qspi0_ctrl->poll_cfg.poll_polarity = pol;
}

INLINE void qspi0_poll_set_disable(uint8_t dis)
{
qspi0_ctrl->poll_cfg.disable_poll = dis;
}

INLINE void qspi0_poll_set_expire(uint8_t en, uint32_t duration)
{
qspi0_ctrl->poll_cfg.enable_expiration = en;
if(en) {
qspi0_ctrl->poll_expiration = duration;
}
}

INLINE void qspi0_poll_set_poll_count(uint8_t count)
{
qspi0_ctrl->poll_cfg.poll_count = count;
}

INLINE void qspi0_poll_set_poll_delay(uint8_t delay)
{
qspi0_ctrl->poll_cfg.poll_repetition_delay = delay;
}

INLINE void qspi0_set_cmd_addr(uint32_t addr)
{
qspi0_ctrl->cmd_address = addr;
}

INLINE void qspi0_stig_set_opcode(uint8_t opcode)
{
qspi0_ctrl->cmd_ctrl.opcode = opcode;
}

INLINE void qspi0_stig_set_read_en(uint8_t en)
{
qspi0_ctrl->cmd_ctrl.enable_read = en;
}

INLINE void qspi0_stig_set_read_bytes(uint8_t bytes)
{
qspi0_ctrl->cmd_ctrl.read_bytes = bytes;
}

INLINE void qspi0_stig_set_addr(uint8_t en, uint8_t bytes, uint32_t addr)
{
qspi0_ctrl->cmd_ctrl.enable_cmd_addr = en;
qspi0_ctrl->cmd_ctrl.addr_bytes = bytes;
if(en) {
qspi0_ctrl->cmd_address = addr;
}
}

INLINE void qspi0_stig_set_mode_en(uint8_t en)
{
qspi0_ctrl->cmd_ctrl.enable_mode = en;
}

INLINE void qspi0_stig_set_write_en(uint8_t en)
{
qspi0_ctrl->cmd_ctrl.enable_write = en;
}

INLINE void qspi0_stig_set_write_bytes(uint8_t bytes)
{
qspi0_ctrl->cmd_ctrl.write_bytes = bytes;
}

INLINE void qspi0_stig_set_dummy_cycles(uint8_t cycles)
{
qspi0_ctrl->cmd_ctrl.dummy_cycles = cycles;
}

INLINE void qspi0_stig_set_mem_bank(uint8_t en, uint8_t bytes)
{
qspi0_ctrl->cmd_ctrl.enable_bank = en;
if(en) {
qspi0_ctrl->cmd_ctrl_mem.mem_bank_req_bytes = bytes;
}
}

static void qspi0_cfg_set_baudrate(uint8_t baudrate)
{
qspi0_ctrl->config.baud_rate = baudrate;
}

static const struct qspi_stig_reg_t psram_stig_read_cmd = {
.enable_bank = 0,
.dummy_cycles = 0,
.write_bytes = 0,
.enable_write = 0,
.addr_bytes = 2, /* QSPI_STIG_ADDR_BYTES_3 /
.enable_mode = 0,
.enable_cmd_addr = 1,
.read_bytes = 3,
.enable_read = 1,
.opcode = PSRAM_READ_OPCODE, / 0x03 */
};

static const struct qspi_stig_reg_t psram_stig_write_cmd = {
.enable_bank = 0,
.dummy_cycles = 0,
.write_bytes = 3,
.enable_write = 1,
.addr_bytes = 2, /* QSPI_STIG_ADDR_BYTES_3 /
.enable_mode = 0,
.enable_cmd_addr = 1,
.read_bytes = 0,
.enable_read = 0,
.opcode = PSRAM_PAGE_PROGRAM_OPCODE, / 0x02 */
};

static int qspi0_stig_cmd(struct qspi_stig_reg_t cmd, enum qspi_stig_cmd_type_t type, int len, uint8_t *buffer)
{
uint32_t tmp_u32[2];
uint8_t *tmp_u8 = (uint8_t *)tmp_u32;

if(type == QSPI_STIG_CMD_BANK_READ) {
    if(QSPI0_STIG_BANK_DEPTH < len) {
        return -1;
    }
}
else {
    if(QSPI0_STIG_MAX_SINGLE_LEN < len) {
        return -1;
    }
}

while(qspi0_is_busy());

if(type == QSPI_STIG_CMD_EXE) {
    qspi0_ctrl->cmd_ctrl = cmd;
    qspi0_ctrl->cmd_ctrl.execute = 1;
    while(qspi0_ctrl->cmd_ctrl.progress_status);
}
else {
    if(type == QSPI_STIG_CMD_WRITE) {
        memcpy(tmp_u8, buffer, len);
        qspi0_ctrl->write_data_L = tmp_u32[0];
        qspi0_ctrl->write_data_H = tmp_u32[1];
        cmd.write_bytes = len - 1;
        qspi0_ctrl->cmd_ctrl = cmd;
        qspi0_ctrl->cmd_ctrl.execute = 1;
        while(qspi0_ctrl->cmd_ctrl.progress_status);
    }
    else {
        cmd.read_bytes = len - 1;
        qspi0_ctrl->cmd_ctrl = cmd;
        qspi0_ctrl->cmd_ctrl.execute = 1;
        while(qspi0_ctrl->cmd_ctrl.progress_status);
        if(type == QSPI_STIG_CMD_READ) {
            tmp_u32[0] = qspi0_ctrl->read_data_L;
            tmp_u32[1] = qspi0_ctrl->read_data_H;
            //co_printf("READ_L: 0x%08x, READ_H: 0x%08x.\r\n", tmp_u32[0], tmp_u32[1]);
            memcpy(buffer, tmp_u8, len);
        }
        else {
            //TBD, BANK READ
        }
    }
}

return 0;

}

void psram_enter_quad(void)
{
qspi0_stig_cmd(enter_quad_mode_cmd, QSPI_STIG_CMD_EXE, 0, NULL);
}

uint32_t psram_read_id(void)
{
uint32_t flash_id;
qspi0_stig_cmd(psram_read_id_cmd, QSPI_STIG_CMD_READ, 3, (uint8_t *)&flash_id);
return (flash_id&0xffffff);
}

static void psram_controller_init(uint16_t page_boundary)
{
while(qspi0_is_busy());

#if PSRAM_ENABLE_Q_MODE == 1
qspi0_read_set_opcode(PSRAM_FAST_READ_OPCODE);
qspi0_read_set_instruction_type(QSPI_WIRE_TYPE_QIO);
qspi0_read_set_address_type(QSPI_WIRE_TYPE_QIO);
qspi0_read_set_data_type(QSPI_WIRE_TYPE_QIO);
qspi0_read_set_dummy_cycles(4);
qspi0_read_set_mode_en(0);
qspi0_set_mode_bit(0);//8 bits data after addr

qspi0_write_set_opcode(PSRAM_PAGE_QUAL_PROGRAM_OPCODE);
qspi0_write_set_address_type(QSPI_WIRE_TYPE_QIO);
qspi0_write_set_data_type(QSPI_WIRE_TYPE_QIO);
qspi0_write_set_dummy_cycles(0);

#else
qspi0_read_set_opcode(PSRAM_FAST_QUAL_READ_OPCODE);
qspi0_read_set_instruction_type(QSPI_WIRE_TYPE_STAND);
qspi0_read_set_address_type(QSPI_WIRE_TYPE_QIO);
qspi0_read_set_data_type(QSPI_WIRE_TYPE_QIO);
qspi0_read_set_dummy_cycles(6);
qspi0_read_set_mode_en(0);
qspi0_set_mode_bit(0);//8 bits data after addr

qspi0_write_set_opcode(PSRAM_PAGE_QUAL_PROGRAM_OPCODE);
qspi0_write_set_address_type(QSPI_WIRE_TYPE_QIO);
qspi0_write_set_data_type(QSPI_WIRE_TYPE_QIO);
qspi0_write_set_dummy_cycles(0);

#endif

//init configuration register
qspi0_cfg_set_cpol(0);
qspi0_cfg_set_cpha(0);
qspi0_cfg_set_enable_dac(1);
qspi0_cfg_set_enable_legacy(0);
qspi0_cfg_set_enable_remap(1);

#if QSPI0_HIGH_SPEED
qspi0_cfg_set_baudrate(PSRAM_CLK_DIV_SEL);
#else
qspi0_cfg_set_baudrate(QSPI_BAUDRATE_DIV_32);
#endif
qspi0_cfg_set_enable_AHB_decoder(1);
qspi0_write_set_wel_dis(1);
qspi0_poll_set_disable(1);

#if QSPI0_HIGH_SPEED
qspi0_ctrl->read_cap.delay_capture = 3;
#else
qspi0_ctrl->read_cap.delay_capture = 0;
#endif
qspi0_ctrl->read_cap.enable_loopback_clk = 1;
qspi0_ctrl->delay.sel_start_offset = 2;
qspi0_ctrl->delay.sel_end_offset = 2;
qspi0_ctrl->delay.sel_dessert = 2;
qspi0_ctrl->cs_ctrl.rd_brk_en = 1;
qspi0_ctrl->cs_ctrl.disable_cs_after_first_byte = 0; /* forum-verified working value for quad PSRAM (was 1 in SDK) /
qspi0_ctrl->cs_ctrl.page_boundary_protect_en = 1;
qspi0_ctrl->cs_ctrl.page_boundary = page_boundary;
qspi0_set_remap_address(QSPI1_DAC_ADDRESS);
qspi0_ctrl->AHB_trigger_address = PSRAM_BASE; / DAC window trigger (old project set it; default points elsewhere) */
qspi0_cfg_set_enable(1);
}

void psram_cache_enable(void)
{
__CACHE_FLUSH(CACHE);
__CACHE_WR_MODE_SET(CACHE, CACHE_WR_WRITE_THROUGH);
__CACHE_ADDR_RANGEx_BANK_SET(CACHE, 0, 0x0000);
__CACHE_ADDR_RANGEx_MASK_SET(CACHE, 0, 0x0000);
__CACHE_ADDR_RANGEx_POL_SET(CACHE, 0, CACHE_POL_CACHABLE);
__CACHE_ADDR_RANGEx_ENABLE(CACHE, 0);
__CACHE_ENABLE(CACHE);
}

bool psram_init(enum psram_clk_sel_t clk_sel)
{
uint32_t ref_clk;

if (clk_sel >= PSRAM_CLK_SEL_MAX) {
    return false;
}

switch (clk_sel) {
    case PSRAM_CLK_SEL_COREH_48M:
        system_regs->mdm_qspi_cfg.qspi0_ref_clk_sel = 0;
        ref_clk = 48000000;
        break;
    case PSRAM_CLK_SEL_COREH_96M:
        system_regs->mdm_qspi_cfg.qspi0_ref_clk_sel = 1;
        ref_clk = 96000000;
        break;      
    case PSRAM_CLK_SEL_COREH_192M:
        system_regs->mdm_qspi_cfg.qspi0_ref_clk_sel = 2;
        ref_clk = 192000000;
        break;
    default:
        return false;
}
system_regs->mdm_qspi_cfg.qspi0_ref_clk_en=1;
system_regs->mdm_qspi_cfg.qspi0_hclk_en=1;
system_regs->mdm_qspi_cfg.qspi0_io_ctl_oen=0;

if(psram_delay == 0xFF)
{
    qspi0_stig_cmd(reset_enable_cmd, QSPI_STIG_CMD_EXE, 0, NULL);
    qspi0_stig_cmd(reset_cmd, QSPI_STIG_CMD_EXE, 0, NULL);
    co_delay_10us(20);  /* 200us reset recovery before quad entry */
    /* serial write magic @0 while die in SPI mode (baseline) */
    {
        uint32_t magic = 0xc3c3c3c3;
        uint32_t chk = 0;
        qspi0_ctrl->cmd_address = 0;
        qspi0_stig_cmd(psram_stig_write_cmd, QSPI_STIG_CMD_WRITE, 4, (uint8_t *)&magic);
        qspi0_ctrl->cmd_address = 0;
        qspi0_stig_cmd(psram_stig_read_cmd, QSPI_STIG_CMD_READ, 4, (uint8_t *)&chk);
        co_printf("psram serial w/r chk=%x\r\n", chk);
    }

#if PSRAM_ENABLE_Q_MODE == 1
psram_enter_quad();
#endif // PSRAM_ENABLE_Q_MODE == 1
}

/* about 100 bytes can be transmitted during 8us when QSPI clock is 24MHz */
ref_clk /= ((PSRAM_CLK_DIV_SEL+1) * 2);
uint32_t bytes = ref_clk / 240000;
uint32_t boundary_cfg = 1 << (31 - __CLZ(bytes));
if (boundary_cfg >= 0x100) {
    boundary_cfg = 0x100;
}
psram_controller_init(boundary_cfg);

if(psram_delay != 0xFF)
{
    qspi0_ctrl->read_cap.delay_capture = psram_delay;
}
else
{
    /* detect read capture delay configuration */
    uint8_t delay_lower, delay_upper, index;
    /* QUAD READ test v2: sweep dummy cycles x capture taps.
       Serial-written c3c3c3c3 @0 must appear via quad DAC read. Log non-zero only. */
    {
        static const uint8_t dummies[] = {4, 2, 6, 8, 0, 3, 5, 1, 7};
        uint8_t found = 0;
        for (uint8_t di = 0; di < sizeof(dummies) && !found; di++) {
            qspi0_read_set_dummy_cycles(dummies[di]);
            for (index = 0; index < 16; index++) {
                while(qspi0_is_busy());
                qspi0_ctrl->read_cap.delay_capture = index;
                uint32_t dbg = *(volatile uint32_t *)(PSRAM_BASE);
                if (dbg != 0) {
                    co_printf("psram qt(d=%d,t=%d)=%x\r\n", dummies[di], index, dbg);
                }
                if (dbg == 0xc3c3c3c3) {
                    co_printf("psram QUAD READ OK (dummy=%d tap=%d)\r\n", dummies[di], index);
                    found = 1;
                    break;
                }
            }
        }
        if (!found) {
            co_printf("psram QUAD READ DEAD (9 dummies x 16 taps)\r\n");
        }
    }
    /* QUAD WRITE test: write via quad DAC @4, verify via SERIAL read @4 */
    {
        *(volatile uint32_t *)(PSRAM_BASE + 4) = 0x5a5a5a5a;
        while(qspi0_is_busy());
        uint32_t chk4 = 0;
        qspi0_ctrl->cmd_address = 4;
        qspi0_stig_cmd(psram_stig_read_cmd, QSPI_STIG_CMD_READ, 4, (uint8_t *)&chk4);
        co_printf("psram quad w @4, serial sees=%x %s\r\n", chk4,
                  (chk4 == 0x5a5a5a5a) ? "QUAD WRITE OK" : "QUAD WRITE DEAD");
    }
    *(volatile uint32_t *)(PSRAM_BASE) = 0x5a5a5a5a;
    while(qspi0_is_busy());

    for (index = 0; index < 16; index++) {
        while(qspi0_is_busy());
        qspi0_ctrl->read_cap.delay_capture = index;
        if (*(volatile uint32_t *)(PSRAM_BASE) == 0x5a5a5a5a) {
            break;
        }
    }
    if (index == 16) {
        system_regs->mdm_qspi_cfg.qspi0_ref_clk_en=0;
        return false;
    }
    else {
        delay_lower = index;
    }
    for (; index < 16; index++) {
        while(qspi0_is_busy());        
        qspi0_ctrl->read_cap.delay_capture = index;
        delay_upper = index;
        if (*(volatile uint32_t *)(PSRAM_BASE) != 0x5a5a5a5a) {
            break;
        }
    }
    
    psram_delay = ((delay_lower + delay_upper)>>1);
    while(qspi0_is_busy());
    qspi0_ctrl->read_cap.delay_capture = psram_delay;      
}
return true;

}

/* ---- old-project helpers restored: the only PSRAM path proven on this

 board+die (single-lane DAC, verified working on FR8008GPU 2026-10-27).

 SDK quad framings (all-quad and 1-4-4) both fail on this die. ---- */

void psram_reset(void)
{
qspi0_stig_cmd(reset_enable_cmd, QSPI_STIG_CMD_EXE, 0, NULL);
qspi0_stig_cmd(reset_cmd, QSPI_STIG_CMD_EXE, 0, NULL);
}

void psram_set_delay(uint8_t d)
{
qspi0_ctrl->read_cap.delay_capture = d;
}

void psram_set_ahb_trigger(uint32_t addr)
{
qspi0_ctrl->AHB_trigger_address = addr;
}

void psram_set_frame(uint8_t r_op, uint8_t r_it, uint8_t r_at, uint8_t r_dt, uint8_t r_dummy,
uint8_t w_op, uint8_t w_at, uint8_t w_dt, uint8_t w_dummy)
{
qspi0_read_set_opcode(r_op);
qspi0_read_set_instruction_type(r_it);
qspi0_read_set_address_type(r_at);
qspi0_read_set_data_type(r_dt);
qspi0_read_set_dummy_cycles(r_dummy);
qspi0_read_set_mode_en(0);
qspi0_set_mode_bit(0);
qspi0_write_set_opcode(w_op);
qspi0_write_set_address_type(w_at);
qspi0_write_set_data_type(w_dt);
qspi0_write_set_dummy_cycles(w_dummy);
}

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