Bluetooth: SPI: introduce CONFIG_BLUETOOTH_SPI_BLUENRG
This new option is used to encapsulate the logic specific to devices implementing the BlueNRG Bluetooth stack (e.g. X-NUCLEO-IDB05A1). The current BlueNRG specific logic covers the HCI Reset handling and the manual control of the SPI Chip Select line (normally not needed since spi_transceive is also responsible for controlling the SPI CS line). Change-Id: I5db4addf873eee0af2d957e2181c50aac53ab656 Signed-off-by: Ricardo Salveti <ricardo.salveti@linaro.org>
This commit is contained in:
Ricardo Salveti
Johan Hedberg
parent
ef7f2bd54e
commit
4afe063aad
2 changed files with 29 additions and 2 deletions
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@ -46,7 +46,7 @@ config BLUETOOTH_SPI
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HCI packets are sent and received as single Byte transferrs,
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prepended after a known header. Headers may vary per device, so
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additional platform specific knowlege may need to be added as
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devices are. Current driver supports; ST X-NUCLEO BLE series.
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devices are.
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config BLUETOOTH_NO_DRIVER
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bool "No default HCI driver"
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@ -108,8 +108,16 @@ config BLUETOOTH_HCI_RECV_RESERVE
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if BLUETOOTH_SPI
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config BLUETOOTH_SPI_BLUENRG
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bool "Enable compatibility with BlueNRG-based devices"
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default n
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help
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Enable support for devices compatible with the BlueNRG Bluetooth
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Stack. Current driver supports: ST X-NUCLEO BLE series.
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config BLUETOOTH_SPI_CHIP_SELECT_DEV_NAME
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string "Chip Select (CS) line driver name"
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depends on BLUETOOTH_SPI_BLUENRG
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help
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This option specifies the name of GPIO driver controlling
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the Chip Select (CS) line.
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@ -128,6 +136,7 @@ config BLUETOOTH_SPI_RESET_DEV_NAME
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config BLUETOOTH_SPI_CHIP_SELECT_PIN
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int "SPI Chip Select (CS) line number"
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depends on BLUETOOTH_SPI_BLUENRG
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help
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This option specifies the Chip Select (CS) line number on the SPI
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device
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@ -43,14 +43,18 @@
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#define CMD_OCF 2
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#define GPIO_IRQ_PIN CONFIG_BLUETOOTH_SPI_IRQ_PIN
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#define GPIO_CS_PIN CONFIG_BLUETOOTH_SPI_CHIP_SELECT_PIN
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#define GPIO_RESET_PIN CONFIG_BLUETOOTH_SPI_RESET_PIN
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#if defined(CONFIG_BLUETOOTH_SPI_BLUENRG)
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#define GPIO_CS_PIN CONFIG_BLUETOOTH_SPI_CHIP_SELECT_PIN
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#endif /* CONFIG_BLUETOOTH_SPI_BLUENRG */
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#define MAX_RX_MSG_LEN CONFIG_BLUETOOTH_SPI_RX_BUFFER_SIZE
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#define MAX_TX_MSG_LEN CONFIG_BLUETOOTH_SPI_TX_BUFFER_SIZE
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static struct device *spi_dev;
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#if defined(CONFIG_BLUETOOTH_SPI_BLUENRG)
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static struct device *cs_dev;
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#endif /* CONFIG_BLUETOOTH_SPI_BLUENRG */
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static struct device *irq_dev;
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static struct device *rst_dev;
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@ -131,8 +135,10 @@ static void bt_spi_rx_thread(void)
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k_sem_take(&sem_busy, K_FOREVER);
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do {
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#if defined(CONFIG_BLUETOOTH_SPI_BLUENRG)
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gpio_pin_write(cs_dev, GPIO_CS_PIN, 1);
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gpio_pin_write(cs_dev, GPIO_CS_PIN, 0);
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#endif /* CONFIG_BLUETOOTH_SPI_BLUENRG */
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spi_transceive(spi_dev,
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header_master, 5, header_slave, 5);
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} while (header_slave[STATUS_HEADER_TOREAD] == 0 ||
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@ -144,7 +150,9 @@ static void bt_spi_rx_thread(void)
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spi_transceive(spi_dev, &dummy, 1, &rxmsg[i], 1);
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}
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#if defined(CONFIG_BLUETOOTH_SPI_BLUENRG)
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gpio_pin_write(cs_dev, GPIO_CS_PIN, 1);
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#endif /* CONFIG_BLUETOOTH_SPI_BLUENRG */
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k_sem_give(&sem_busy);
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spi_dump_message("RX:ed", rxmsg, size);
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@ -221,8 +229,10 @@ static int bt_spi_send(struct net_buf *buf)
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/* Poll sanity values until device has woken-up */
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do {
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#if defined(CONFIG_BLUETOOTH_SPI_BLUENRG)
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gpio_pin_write(cs_dev, GPIO_CS_PIN, 1);
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gpio_pin_write(cs_dev, GPIO_CS_PIN, 0);
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#endif /* CONFIG_BLUETOOTH_SPI_BLUENRG */
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spi_transceive(spi_dev, header, 5, rxmsg, 5);
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/*
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@ -236,12 +246,15 @@ static int bt_spi_send(struct net_buf *buf)
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/* Transmit the message */
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spi_transceive(spi_dev, buf->data, buf->len, rxmsg, buf->len);
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#if defined(CONFIG_BLUETOOTH_SPI_BLUENRG)
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/* Deselect chip */
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gpio_pin_write(cs_dev, GPIO_CS_PIN, 1);
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#endif /* CONFIG_BLUETOOTH_SPI_BLUENRG */
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k_sem_give(&sem_busy);
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spi_dump_message("TX:ed", buf->data, buf->len);
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#if defined(CONFIG_BLUETOOTH_SPI_BLUENRG)
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/*
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* Since a RESET has been requested, the chip will now restart.
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* Unfortunately the BlueNRG will reply with "reset received" but
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@ -252,6 +265,7 @@ static int bt_spi_send(struct net_buf *buf)
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if (bt_spi_get_cmd(buf->data) == BT_HCI_OP_RESET) {
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k_sem_take(&sem_initialised, K_FOREVER);
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}
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#endif /* CONFIG_BLUETOOTH_SPI_BLUENRG */
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net_buf_unref(buf);
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@ -267,10 +281,12 @@ static int bt_spi_open(void)
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spi_configure(spi_dev, &spi_conf);
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#if defined(CONFIG_BLUETOOTH_SPI_BLUENRG)
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/* Configure the CS (Chip Select) pin */
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gpio_pin_configure(cs_dev, GPIO_CS_PIN,
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GPIO_DIR_OUT | GPIO_PUD_PULL_UP);
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gpio_pin_write(cs_dev, GPIO_CS_PIN, 1);
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#endif /* CONFIG_BLUETOOTH_SPI_BLUENRG */
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/* Configure IRQ pin and the IRQ call-back/handler */
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gpio_pin_configure(irq_dev, GPIO_IRQ_PIN,
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@ -319,12 +335,14 @@ static int _bt_spi_init(struct device *unused)
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return -EIO;
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}
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#if defined(CONFIG_BLUETOOTH_SPI_BLUENRG)
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cs_dev = device_get_binding(CONFIG_BLUETOOTH_SPI_CHIP_SELECT_DEV_NAME);
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if (!cs_dev) {
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BT_ERR("Failed to initialize GPIO driver: %s",
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CONFIG_BLUETOOTH_SPI_CHIP_SELECT_DEV_NAME);
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return -EIO;
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}
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#endif /* CONFIG_BLUETOOTH_SPI_BLUENRG */
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irq_dev = device_get_binding(CONFIG_BLUETOOTH_SPI_IRQ_DEV_NAME);
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if (!irq_dev) {
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