michaelh/zephyr
1
0
Fork 0
Code Releases Activity

drivers: bluetooth: hci: Multiple write transaction support for BlueNRG-MS

Browse source 
Provide multiple write transaction support for BlueNRG-MS, st_hci_spi_v1
protocol. Since by default, BlueNRG-MS write buffer supports up to 127
bytes; however, it is possible to have consecutive write transactions
so as to send data more than 127 bytes.

Signed-off-by: Ali Hozhabri <ali.hozhabri@st.com>
This commit is contained in:
Ali Hozhabri 2024-01-16 16:26:31 +01:00 • committed by Alberto Escolar
commit 88369606e2
1 changed files with 23 additions and 14 deletions
Download patch file Download diff file Expand all files Collapse all files

37
drivers/bluetooth/hci/hci_spi_st.c
View file

@ -57,8 +57,8 @@ LOG_MODULE_REGISTER(bt_driver);
#define CMD_OGF 1
#define CMD_OCF 2
#define SPI_MAX_MSG_LEN 255
/* packet type (1) + opcode (2) + Parameter Total Length (1) + max parameter length (255) */
#define SPI_MAX_MSG_LEN 259
/* Single byte header denoting the buffer type */
#define H4_HDR_SIZE 1
@ -462,6 +462,8 @@ static int bt_spi_send(struct net_buf *buf)
uint16_t size;
uint8_t rx_first[1];
int ret;
uint8_t *data_ptr;
uint16_t remaining_bytes;
LOG_DBG("");
@ -485,21 +487,28 @@ static int bt_spi_send(struct net_buf *buf)
/* Wait for SPI bus to be available */
k_sem_take(&sem_busy, K_FOREVER);
data_ptr = buf->data;
remaining_bytes = buf->len;
do {
ret = bt_spi_get_header(SPI_WRITE, &size);
size = MIN(remaining_bytes, size);
ret = bt_spi_get_header(SPI_WRITE, &size);
size = MIN(buf->len, size);
#if DT_HAS_COMPAT_STATUS_OKAY(st_hci_spi_v2)
if (size < buf->len) {
LOG_WRN("Unable to write full data, skipping");
size = 0;
ret = -ECANCELED;
}
if (size < remaining_bytes) {
LOG_WRN("Unable to write full data, skipping");
size = 0;
ret = -ECANCELED;
}
#endif /* DT_HAS_COMPAT_STATUS_OKAY(st_hci_spi_v2) */
if (!ret) {
/* Transmit the message */
ret = bt_spi_transceive(buf->data, size,
rx_first, 1);
}
if (!ret) {
/* Transmit the message */
ret = bt_spi_transceive(data_ptr, size, rx_first, 1);
}
remaining_bytes -= size;
data_ptr += size;
} while (remaining_bytes > 0 && !ret);
release_cs(size > 0);