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drivers/sdcard_spi: remove copy of sdcard_spi_params_t from device

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It is not necessary to hold a complete copy `sdcard_spi_params_t` in the device descriptor. Constant parameters can be used directly from ROM instead. This saves 24 bytes of RAM.
This commit is contained in:
Gunar Schorcht 2023-05-01 14:21:19 +02:00
parent 7213c0ad3e
commit bfc2a51f70
2 changed files with 33 additions and 33 deletions
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2
drivers/include/sdcard_spi.h
View File

@ -186,7 +186,7 @@ typedef struct {
* @brief Device descriptor for sdcard_spi
*/
typedef struct {
sdcard_spi_params_t params; /**< parameters for pin and spi config */
const sdcard_spi_params_t *params; /**< parameters for pin and spi config */
spi_clk_t spi_clk; /**< active SPI clock speed */
bool use_block_addr; /**< true if block addressing (vs. byte addressing) is used */
bool init_done; /**< set to true once the init procedure completed successfully */

64
drivers/sdcard_spi/sdcard_spi.c
View File

@ -89,7 +89,7 @@ int sdcard_spi_init(sdcard_spi_t *card, const sdcard_spi_params_t *params)
{
sd_init_fsm_state_t state = SD_INIT_START;
card->params = *params;
card->params = params;
card->spi_clk = SD_CARD_SPI_SPEED_PREINIT;
do {
@ -112,14 +112,14 @@ static sd_init_fsm_state_t _init_sd_fsm_step(sdcard_spi_t *card, sd_init_fsm_sta
DEBUG("SD_INIT_START\n");
#ifdef MODULE_PERIPH_SPI_RECONFIGURE
spi_deinit_pins(card->params.spi_dev);
spi_deinit_pins(card->params->spi_dev);
#endif
if ((gpio_init(card->params.mosi, GPIO_OUT) == 0) &&
(gpio_init(card->params.clk, GPIO_OUT) == 0) &&
(gpio_init(card->params.cs, GPIO_OUT) == 0) &&
(gpio_init(card->params.miso, GPIO_IN_PU) == 0) &&
((!gpio_is_valid(card->params.power)) ||
(gpio_init(card->params.power, GPIO_OUT) == 0))) {
if ((gpio_init(card->params->mosi, GPIO_OUT) == 0) &&
(gpio_init(card->params->clk, GPIO_OUT) == 0) &&
(gpio_init(card->params->cs, GPIO_OUT) == 0) &&
(gpio_init(card->params->miso, GPIO_IN_PU) == 0) &&
((!gpio_is_valid(card->params->power)) ||
(gpio_init(card->params->power, GPIO_OUT) == 0))) {
DEBUG("gpio_init(): [OK]\n");
return SD_INIT_SPI_POWER_SEQ;
@ -131,20 +131,20 @@ static sd_init_fsm_state_t _init_sd_fsm_step(sdcard_spi_t *card, sd_init_fsm_sta
case SD_INIT_SPI_POWER_SEQ:
DEBUG("SD_INIT_SPI_POWER_SEQ\n");
if (gpio_is_valid(card->params.power)) {
gpio_write(card->params.power, card->params.power_act_high);
if (gpio_is_valid(card->params->power)) {
gpio_write(card->params->power, card->params->power_act_high);
ztimer_sleep(ZTIMER_USEC, SD_CARD_WAIT_AFTER_POWER_UP_US);
}
gpio_set(card->params.mosi);
gpio_set(card->params.cs); /* unselect sdcard for power up sequence */
gpio_set(card->params->mosi);
gpio_set(card->params->cs); /* unselect sdcard for power up sequence */
/* powersequence: perform at least 74 clockcycles with mosi_pin being high
* (same as sending dummy bytes with 0xFF) */
for (int i = 0; i < SD_POWERSEQUENCE_CLOCK_COUNT; i += 1) {
gpio_set(card->params.clk);
gpio_set(card->params->clk);
ztimer_sleep(ZTIMER_USEC, SD_CARD_PREINIT_CLOCK_PERIOD_US / 2);
gpio_clear(card->params.clk);
gpio_clear(card->params->clk);
ztimer_sleep(ZTIMER_USEC, SD_CARD_PREINIT_CLOCK_PERIOD_US / 2);
}
return SD_INIT_SEND_CMD0;
@ -152,21 +152,21 @@ static sd_init_fsm_state_t _init_sd_fsm_step(sdcard_spi_t *card, sd_init_fsm_sta
case SD_INIT_SEND_CMD0:
DEBUG("SD_INIT_SEND_CMD0\n");
gpio_clear(card->params.mosi);
gpio_clear(card->params->mosi);
/* use soft-spi to perform init command to allow use of internal pull-ups on miso */
_dyn_spi_rxtx_byte = &_sw_spi_rxtx_byte;
/* select sdcard for cmd0 */
gpio_clear(card->params.cs);
gpio_clear(card->params->cs);
uint8_t cmd0_r1 = sdcard_spi_send_cmd(card, SD_CMD_0, SD_CMD_NO_ARG, INIT_CMD0_RETRY_US);
gpio_set(card->params.cs);
gpio_set(card->params->cs);
if (R1_VALID(cmd0_r1) && !R1_ERROR(cmd0_r1) && R1_IDLE_BIT_SET(cmd0_r1)) {
DEBUG("CMD0: [OK]\n");
/* give control over SPI pins back to HW SPI device */
spi_init_pins(card->params.spi_dev);
spi_init_pins(card->params->spi_dev);
/* switch to HW SPI since SD card is now in real SPI mode */
_dyn_spi_rxtx_byte = &_hw_spi_rxtx_byte;
return SD_INIT_ENABLE_CRC;
@ -366,7 +366,7 @@ static inline bool _wait_for_token(sdcard_spi_t *card, uint8_t token, uint32_t r
do {
uint8_t read_byte = 0;
read_byte = spi_transfer_byte(card->params.spi_dev, SPI_CS_UNDEF, true,
read_byte = spi_transfer_byte(card->params->spi_dev, SPI_CS_UNDEF, true,
SD_CARD_DUMMY_BYTE);
if (read_byte == token) {
DEBUG("_wait_for_token: [MATCH]\n");
@ -540,15 +540,15 @@ static inline uint8_t _wait_for_r1(sdcard_spi_t *card, uint32_t retry_us)
void _select_card_spi(sdcard_spi_t *card)
{
spi_acquire(card->params.spi_dev, SPI_CS_UNDEF,
spi_acquire(card->params->spi_dev, SPI_CS_UNDEF,
SD_CARD_SPI_MODE, card->spi_clk);
gpio_clear(card->params.cs);
gpio_clear(card->params->cs);
}
void _unselect_card_spi(sdcard_spi_t *card)
{
gpio_set(card->params.cs);
spi_release(card->params.spi_dev);
gpio_set(card->params->cs);
spi_release(card->params->spi_dev);
}
static inline void _sw_spi_rxtx_byte(sdcard_spi_t *card, uint8_t out, uint8_t *in)
@ -558,23 +558,23 @@ static inline void _sw_spi_rxtx_byte(sdcard_spi_t *card, uint8_t out, uint8_t *i
for (; i >= 0; i--) {
if (((out >> (i)) & 0x01) == 1) {
gpio_set(card->params.mosi);
gpio_set(card->params->mosi);
}
else {
gpio_clear(card->params.mosi);
gpio_clear(card->params->mosi);
}
ztimer_sleep(ZTIMER_USEC, SD_CARD_PREINIT_CLOCK_PERIOD_US / 2);
gpio_set(card->params.clk);
rx = (rx | ((gpio_read(card->params.miso) > 0) << i));
gpio_set(card->params->clk);
rx = (rx | ((gpio_read(card->params->miso) > 0) << i));
ztimer_sleep(ZTIMER_USEC, SD_CARD_PREINIT_CLOCK_PERIOD_US / 2);
gpio_clear(card->params.clk);
gpio_clear(card->params->clk);
}
*in = rx;
}
static inline void _hw_spi_rxtx_byte(sdcard_spi_t *card, uint8_t out, uint8_t *in)
{
*in = spi_transfer_byte(card->params.spi_dev, SPI_CS_UNDEF, true, out);
*in = spi_transfer_byte(card->params->spi_dev, SPI_CS_UNDEF, true, out);
}
static inline uint16_t _transfer_bytes(sdcard_spi_t *card, const uint8_t *out,
@ -712,7 +712,7 @@ static sd_rw_response_t _write_data_packet(sdcard_spi_t *card, uint8_t token,
const uint8_t *data, uint16_t size)
{
spi_transfer_byte(card->params.spi_dev, SPI_CS_UNDEF, true, token);
spi_transfer_byte(card->params->spi_dev, SPI_CS_UNDEF, true, token);
if (_transfer_bytes(card, data, 0, size) == size) {
@ -721,7 +721,7 @@ static sd_rw_response_t _write_data_packet(sdcard_spi_t *card, uint8_t token,
if (_transfer_bytes(card, crc, 0, sizeof(crc)) == sizeof(crc)) {
uint8_t data_response = spi_transfer_byte(card->params.spi_dev, SPI_CS_UNDEF,
uint8_t data_response = spi_transfer_byte(card->params->spi_dev, SPI_CS_UNDEF,
true, SD_CARD_DUMMY_BYTE);
DEBUG("_write_data_packet: DATA_RESPONSE: 0x%02x\n", data_response);
@ -804,7 +804,7 @@ static uint16_t _write_blocks(sdcard_spi_t *card, uint8_t cmd_idx,
/* if this is a multi-block write it is needed to issue a stop
command */
if (cmd_idx == SD_CMD_25) {
spi_transfer_byte(card->params.spi_dev, SPI_CS_UNDEF, true,
spi_transfer_byte(card->params->spi_dev, SPI_CS_UNDEF, true,
SD_DATA_TOKEN_CMD_25_STOP);
DEBUG("_write_blocks: write multi (%d) blocks: [OK]\n", nbl);