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circuitpython/lib/sdmmc/test/test_sdio.c

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// Copyright 2015-2017 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "soc/soc_caps.h"
#if SOC_SDMMC_HOST_SUPPORTED
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "esp_log.h"
#include "esp_heap_caps.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/gpio.h"
#include "driver/sdmmc_host.h"
#include "driver/sdmmc_defs.h"
#include "sdmmc_cmd.h"
#include "unity.h"
/* Second ESP32 board attached as follows:
* Master Slave
* IO18 EN
* IO19 IO0
* IO14 SD_CLK
* IO15 SD_CMD
* IO2 SD_D0
* IO4 SD_D1
* IO12 SD_D2
* IO13 SD_D3
*/
/* TODO: add SDIO slave header files, remove these definitions */
#define DR_REG_SLC_MASK 0xfffffc00
#define SLCCONF1 (DR_REG_SLC_BASE + 0x60)
#define SLC_SLC0_RX_STITCH_EN (BIT(6))
#define SLC_SLC0_TX_STITCH_EN (BIT(5))
#define SLC0TX_LINK (DR_REG_SLC_BASE + 0x40)
#define SLC_SLC0_TXLINK_PARK (BIT(31))
#define SLC_SLC0_TXLINK_RESTART (BIT(30))
#define SLC_SLC0_TXLINK_START (BIT(29))
#define DR_REG_SLCHOST_MASK 0xfffffc00
#define SLCHOST_STATE_W0 (DR_REG_SLCHOST_BASE + 0x64)
#define SLCHOST_CONF_W0 (DR_REG_SLCHOST_BASE + 0x6C)
#define SLCHOST_CONF_W5 (DR_REG_SLCHOST_BASE + 0x80)
#define SLCHOST_WIN_CMD (DR_REG_SLCHOST_BASE + 0x84)
#define SLC_WIN_CMD_READ 0x80
#define SLC_WIN_CMD_WRITE 0xC0
#define SLC_WIN_CMD_S 8
#define SLC_THRESHOLD_ADDR 0x1f800
static const char* TAG = "sdio_test";
static esp_err_t slave_slchost_reg_read(sdmmc_card_t* card, uint32_t addr, uint32_t* out_val)
{
if ((addr & DR_REG_SLCHOST_MASK) != DR_REG_SLCHOST_BASE) {
ESP_LOGW(TAG, "%s: invalid addr 0x%08x\n", __func__, addr);
return ESP_ERR_INVALID_ARG;
}
return sdmmc_io_read_bytes(card, 1, addr & (~DR_REG_SLCHOST_MASK), out_val, sizeof(*out_val));
}
static esp_err_t slave_slchost_reg_write(sdmmc_card_t* card, uint32_t addr, uint32_t val)
{
if ((addr & DR_REG_SLCHOST_MASK) != DR_REG_SLCHOST_BASE) {
ESP_LOGW(TAG, "%s: invalid addr 0x%08x\n", __func__, addr);
return ESP_ERR_INVALID_ARG;
}
return sdmmc_io_write_bytes(card, 1, addr & (~DR_REG_SLCHOST_MASK), &val, sizeof(val));
}
static esp_err_t slave_slc_reg_read(sdmmc_card_t* card, uint32_t addr, uint32_t* val)
{
if ((addr & DR_REG_SLC_MASK) != DR_REG_SLC_BASE) {
ESP_LOGW(TAG, "%s: invalid addr 0x%08x\n", __func__, addr);
return ESP_ERR_INVALID_ARG;
}
uint32_t word = (addr - DR_REG_SLC_BASE) / 4;
if (word > INT8_MAX) {
return ESP_ERR_INVALID_ARG;
}
uint32_t window_command = word | (SLC_WIN_CMD_READ << SLC_WIN_CMD_S);
esp_err_t err = slave_slchost_reg_write(card, SLCHOST_WIN_CMD, window_command);
if (err != ESP_OK) {
return err;
}
return slave_slchost_reg_read(card, SLCHOST_STATE_W0, val);
}
static esp_err_t slave_slc_reg_write(sdmmc_card_t* card, uint32_t addr, uint32_t val)
{
if ((addr & DR_REG_SLC_MASK) != DR_REG_SLC_BASE) {
ESP_LOGW(TAG, "%s: invalid addr 0x%08x\n", __func__, addr);
return ESP_ERR_INVALID_ARG;
}
uint32_t word = (addr - DR_REG_SLC_BASE) / 4;
if (word > INT8_MAX) {
return ESP_ERR_INVALID_ARG;
}
esp_err_t err = slave_slchost_reg_write(card, SLCHOST_CONF_W5, val);
if (err != ESP_OK) {
return err;
}
uint32_t window_command = word | (SLC_WIN_CMD_WRITE << SLC_WIN_CMD_S);
return slave_slchost_reg_write(card, SLCHOST_WIN_CMD, window_command);
}
/** Reset and put slave into download mode */
static void reset_slave(void)
{
const int pin_en = 18;
const int pin_io0 = 19;
gpio_config_t gpio_cfg = {
.pin_bit_mask = BIT64(pin_en) | BIT64(pin_io0),
.mode = GPIO_MODE_OUTPUT_OD,
};
TEST_ESP_OK(gpio_config(&gpio_cfg));
gpio_set_level(pin_en, 0);
gpio_set_level(pin_io0, 0);
vTaskDelay(10 / portTICK_PERIOD_MS);
gpio_set_level(pin_en, 1);
vTaskDelay(10 / portTICK_PERIOD_MS);
gpio_set_level(pin_io0, 1);
}
static void sdio_slave_common_init(sdmmc_card_t* card)
{
uint8_t card_cap;
esp_err_t err = sdmmc_io_read_byte(card, 0, SD_IO_CCCR_CARD_CAP, &card_cap);
TEST_ESP_OK(err);
printf("CAP: 0x%02x\n", card_cap);
uint8_t hs;
err = sdmmc_io_read_byte(card, 0, SD_IO_CCCR_HIGHSPEED, &hs);
TEST_ESP_OK(err);
printf("HS: 0x%02x\n", hs);
#define FUNC1_EN_MASK (BIT(1))
uint8_t ioe;
err = sdmmc_io_read_byte(card, 0, SD_IO_CCCR_FN_ENABLE, &ioe);
TEST_ESP_OK(err);
printf("IOE: 0x%02x\n", ioe);
uint8_t ior = 0;
err = sdmmc_io_read_byte(card, 0, SD_IO_CCCR_FN_READY, &ior);
TEST_ESP_OK(err);
printf("IOR: 0x%02x\n", ior);
// enable function 1
ioe |= FUNC1_EN_MASK;
err = sdmmc_io_write_byte(card, 0, SD_IO_CCCR_FN_ENABLE, ioe, NULL);
TEST_ESP_OK(err);
err = sdmmc_io_read_byte(card, 0, SD_IO_CCCR_FN_ENABLE, &ioe);
TEST_ESP_OK(err);
printf("IOE: 0x%02x\n", ioe);
// wait for the card to become ready
while ( (ior & FUNC1_EN_MASK) == 0 ) {
err = sdmmc_io_read_byte(card, 0, SD_IO_CCCR_FN_READY, &ior);
TEST_ESP_OK(err);
printf("IOR: 0x%02x\n", ior);
}
// get interrupt status
uint8_t ie;
err = sdmmc_io_read_byte(card, 0, SD_IO_CCCR_INT_ENABLE, &ie);
TEST_ESP_OK(err);
printf("IE: 0x%02x\n", ie);
// enable interrupts for function 1&2 and master enable
ie |= BIT(0) | FUNC1_EN_MASK;
err = sdmmc_io_write_byte(card, 0, SD_IO_CCCR_INT_ENABLE, ie, NULL);
TEST_ESP_OK(err);
err = sdmmc_io_read_byte(card, 0, SD_IO_CCCR_INT_ENABLE, &ie);
TEST_ESP_OK(err);
printf("IE: 0x%02x\n", ie);
}
/** Common for all SDIO devices, set block size for specific function */
static void sdio_slave_set_blocksize(sdmmc_card_t* card, int function, uint16_t bs)
{
const uint8_t* bs_u8 = (const uint8_t*) &bs;
uint16_t bs_read = 0;
uint8_t* bs_read_u8 = (uint8_t*) &bs_read;
uint32_t offset = SD_IO_FBR_START * function;
TEST_ESP_OK( sdmmc_io_write_byte(card, 0, offset + SD_IO_CCCR_BLKSIZEL, bs_u8[0], NULL));
TEST_ESP_OK( sdmmc_io_write_byte(card, 0, offset + SD_IO_CCCR_BLKSIZEH, bs_u8[1], NULL));
TEST_ESP_OK( sdmmc_io_read_byte(card, 0, offset + SD_IO_CCCR_BLKSIZEL, &bs_read_u8[0]));
TEST_ESP_OK( sdmmc_io_read_byte(card, 0, offset + SD_IO_CCCR_BLKSIZEH, &bs_read_u8[1]));
TEST_ASSERT_EQUAL_HEX16(bs, bs_read);
}
/**
* ESP32 ROM code does not set some SDIO slave registers to the defaults
* we need, this function clears/sets some bits.
*/
static void esp32_slave_init_extra(sdmmc_card_t* card)
{
printf("Initialize some ESP32 SDIO slave registers\n");
uint32_t reg_val;
TEST_ESP_OK( slave_slc_reg_read(card, SLCCONF1, &reg_val) );
reg_val &= ~(SLC_SLC0_RX_STITCH_EN | SLC_SLC0_TX_STITCH_EN);
TEST_ESP_OK( slave_slc_reg_write(card, SLCCONF1, reg_val) );
TEST_ESP_OK( slave_slc_reg_read(card, SLC0TX_LINK, &reg_val) );
reg_val |= SLC_SLC0_TXLINK_START;
TEST_ESP_OK( slave_slc_reg_write(card, SLC0TX_LINK, reg_val) );
}
/**
* ESP32 bootloader implements "SIP" protocol which can be used to exchange
* some commands, events, and data packets between the host and the slave.
* This function sends a SIP command, testing CMD53 block writes along the way.
*/
static void esp32_send_sip_command(sdmmc_card_t* card)
{
printf("Test block write using CMD53\n");
const size_t block_size = 512;
uint8_t* data = heap_caps_calloc(1, block_size, MALLOC_CAP_DMA);
struct sip_cmd_bootup {
uint32_t boot_addr;
uint32_t discard_link;
};
struct sip_cmd_write_reg {
uint32_t addr;
uint32_t val;
};
struct sip_hdr {
uint8_t fc[2];
uint16_t len;
uint32_t cmdid;
uint32_t seq;
};
struct sip_hdr* hdr = (struct sip_hdr*) data;
size_t len;
#define SEND_WRITE_REG_CMD
#ifdef SEND_WRITE_REG_CMD
struct sip_cmd_write_reg *write_reg = (struct sip_cmd_write_reg*) (data + sizeof(*hdr));
len = sizeof(*hdr) + sizeof(*write_reg);
hdr->cmdid = 3; /* SIP_CMD_WRITE_REG */
write_reg->addr = GPIO_ENABLE_W1TS_REG;
write_reg->val = BIT(0) | BIT(2) | BIT(4); /* Turn of RGB LEDs on WROVER-KIT */
#else
struct sip_cmd_bootup *bootup = (struct sip_cmd_bootup*) (data + sizeof(*hdr));
len = sizeof(*hdr) + sizeof(*bootup);
hdr->cmdid = 5; /* SIP_CMD_BOOTUP */
bootup->boot_addr = 0x4005a980; /* start_tb_console function in ROM */
bootup->discard_link = 1;
#endif
hdr->len = len;
TEST_ESP_OK( sdmmc_io_write_blocks(card, 1, SLC_THRESHOLD_ADDR - len, data, block_size) );
free(data);
}
static void test_cmd52_read_write_single_byte(sdmmc_card_t* card)
{
esp_err_t err;
printf("Write bytes to slave's W0_REG using CMD52\n");
const size_t scratch_area_reg = SLCHOST_CONF_W0 - DR_REG_SLCHOST_BASE;
const uint8_t test_byte_1 = 0xa5;
const uint8_t test_byte_2 = 0xb6;
// used to check Read-After-Write
uint8_t test_byte_1_raw;
uint8_t test_byte_2_raw;
uint8_t val = 0;
err = sdmmc_io_write_byte(card, 1, scratch_area_reg, test_byte_1, &test_byte_1_raw);
TEST_ESP_OK(err);
TEST_ASSERT_EQUAL_UINT8(test_byte_1, test_byte_1_raw);
err = sdmmc_io_write_byte(card, 1, scratch_area_reg + 1, test_byte_2, &test_byte_2_raw);
TEST_ESP_OK(err);
TEST_ASSERT_EQUAL_UINT8(test_byte_2, test_byte_2_raw);
printf("Read back bytes using CMD52\n");
TEST_ESP_OK(sdmmc_io_read_byte(card, 1, scratch_area_reg, &val));
TEST_ASSERT_EQUAL_UINT8(test_byte_1, val);
TEST_ESP_OK(sdmmc_io_read_byte(card, 1, scratch_area_reg + 1, &val));
TEST_ASSERT_EQUAL_UINT8(test_byte_2, val);
}
static void test_cmd53_read_write_multiple_bytes(sdmmc_card_t* card, size_t n_bytes)
{
printf("Write multiple bytes using CMD53\n");
const size_t scratch_area_reg = SLCHOST_CONF_W0 - DR_REG_SLCHOST_BASE;
uint8_t* src = heap_caps_malloc(512, MALLOC_CAP_DMA);
uint32_t* src_32 = (uint32_t*) src;
for (size_t i = 0; i < (n_bytes + 3) / 4; ++i) {
src_32[i] = rand();
}
TEST_ESP_OK(sdmmc_io_write_bytes(card, 1, scratch_area_reg, src, n_bytes));
ESP_LOG_BUFFER_HEX(TAG, src, n_bytes);
printf("Read back using CMD52\n");
uint8_t* dst = heap_caps_malloc(512, MALLOC_CAP_DMA);
for (size_t i = 0; i < n_bytes; ++i) {
TEST_ESP_OK(sdmmc_io_read_byte(card, 1, scratch_area_reg + i, &dst[i]));
}
ESP_LOG_BUFFER_HEX(TAG, dst, n_bytes);
TEST_ASSERT_EQUAL_UINT8_ARRAY(src, dst, n_bytes);
printf("Read back using CMD53\n");
TEST_ESP_OK(sdmmc_io_read_bytes(card, 1, scratch_area_reg, dst, n_bytes));
ESP_LOG_BUFFER_HEX(TAG, dst, n_bytes);
TEST_ASSERT_EQUAL_UINT8_ARRAY(src, dst, n_bytes);
free(src);
free(dst);
}
TEST_CASE("can probe and talk to ESP32 SDIO slave", "[sdio][ignore]")
{
reset_slave();
/* Probe */
sdmmc_host_t config = SDMMC_HOST_DEFAULT();
config.flags = SDMMC_HOST_FLAG_1BIT;
config.max_freq_khz = SDMMC_FREQ_PROBING;
sdmmc_slot_config_t slot_config = SDMMC_SLOT_CONFIG_DEFAULT();
(sdmmc_host_init());
(sdmmc_host_init_slot(SDMMC_HOST_SLOT_1, &slot_config));
sdmmc_card_t* card = malloc(sizeof(sdmmc_card_t));
TEST_ASSERT_NOT_NULL(card);
TEST_ESP_OK(sdmmc_card_init(&config, card));
sdmmc_card_print_info(stdout, card);
/* Set up standard SDIO registers */
sdio_slave_common_init(card);
srand(0);
for (int repeat = 0; repeat < 4; ++repeat) {
test_cmd52_read_write_single_byte(card);
test_cmd53_read_write_multiple_bytes(card, 1);
test_cmd53_read_write_multiple_bytes(card, 2);
test_cmd53_read_write_multiple_bytes(card, 3);
test_cmd53_read_write_multiple_bytes(card, 4);
test_cmd53_read_write_multiple_bytes(card, 5);
test_cmd53_read_write_multiple_bytes(card, 23);
test_cmd53_read_write_multiple_bytes(card, 24);
}
sdio_slave_set_blocksize(card, 0, 512);
sdio_slave_set_blocksize(card, 1, 512);
esp32_slave_init_extra(card);
esp32_send_sip_command(card);
TEST_ESP_OK(sdmmc_host_deinit());
free(card);
}
#endif //SOC_SDMMC_HOST_SUPPORTED
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