This is a low level driver for the KSZ8851SNL ethernet PHY through 4-wire SPI.
It provides functions for configuring and communicating with the ethernet PHY.
Before writing data to the ethernet PHY call ksz8851snl_init() which will set up the physical interface and the PHY. A file named conf_eth.h is needed to define which interface to use. In addition one also need to define the pins KSZ8851SNL_RSTN_PIN, KSZ8851SNL_CS_PIN and KSZ8851SNL_INTN_EIC_PIN and the PHY KSZ8851SNL_CLOCK_SPEED.
An example conf_eth.h file could look like
This driver depends on the following modules:
Variables | |
struct spi_module | ksz8851snl_master |
struct spi_slave_inst | ksz8851snl_slave |
PHY register read/write functions | |
uint16_t | ksz8851_reg_read (uint16_t reg) |
Read a register value. More... | |
void | ksz8851_reg_write (uint16_t reg, uint16_t wrdata) |
Write a register value. More... | |
void | ksz8851_reg_setbits (uint16_t reg, uint16_t bits_to_set) |
Read register content, set bitmask and write back to register. More... | |
void | ksz8851_reg_clrbits (uint16_t reg, uint16_t bits_to_clr) |
Read register content, clear bitmask and write back to register. More... | |
PHY FIFO read/write functions | |
void | ksz8851_fifo_read (uint8_t *buf, uint32_t len) |
Read internal fifo buffer. More... | |
void | ksz8851_fifo_write_begin (uint32_t tot_len) |
Start to write internal fifo buffer. More... | |
void | ksz8851_fifo_write (uint8_t *buf, uint32_t len) |
Write internal fifo buffer. More... | |
void | ksz8851_fifo_write_end (uint32_t pad) |
Complete write operation. More... | |
Initialization and configuration | |
uint32_t | ksz8851snl_init (void) |
Initialize the PHY controller. More... | |
void | configure_intn (void(*p_handler)(void)) |
Configure the INTN interrupt. More... | |
void configure_intn | ( | void(*)(void) | p_handler | ) |
Configure the INTN interrupt.
p_handler | callback pointer to use when INTN interrupt raises. |
References extint_chan_conf::detection_criteria, EXTINT_CALLBACK_TYPE_DETECT, extint_chan_enable_callback(), extint_chan_get_config_defaults(), extint_chan_set_config(), EXTINT_DETECT_FALLING, EXTINT_PULL_UP, extint_register_callback(), extint_chan_conf::filter_input_signal, extint_chan_conf::gpio_pin, extint_chan_conf::gpio_pin_mux, and extint_chan_conf::gpio_pin_pull.
Referenced by ksz8851snl_low_level_init().
void ksz8851_fifo_read | ( | uint8_t * | buf, |
uint32_t | len | ||
) |
Read internal fifo buffer.
buf | the buffer to store the data from the fifo buffer. |
len | the amount of data to read. |
References FIFO_READ, ksz8851snl_master, ksz8851snl_slave, spi_read_buffer_wait(), spi_select_slave(), and spi_transceive_buffer_wait().
Referenced by ksz8851snl_update().
void ksz8851_fifo_write | ( | uint8_t * | buf, |
uint32_t | len | ||
) |
Write internal fifo buffer.
buf | the buffer to send to the fifo buffer. |
len | the size of the pbuf element to write. |
References ksz8851snl_master, and spi_write_buffer_wait().
Referenced by ksz8851snl_update().
void ksz8851_fifo_write_begin | ( | uint32_t | tot_len | ) |
Start to write internal fifo buffer.
tot_len | the total amount of data to write. |
References FIFO_WRITE, ksz8851snl_master, ksz8851snl_slave, spi_select_slave(), and spi_write_buffer_wait().
Referenced by ksz8851snl_update().
void ksz8851_fifo_write_end | ( | uint32_t | pad | ) |
Complete write operation.
pad | amount of dummy data (bytes) to write to keep 32 bits alignment in the internal FIFO. |
References ksz8851snl_master, ksz8851snl_slave, spi_select_slave(), and spi_write_buffer_wait().
Referenced by ksz8851snl_update().
void ksz8851_reg_clrbits | ( | uint16_t | reg, |
uint16_t | bits_to_clr | ||
) |
Read register content, clear bitmask and write back to register.
reg | the register address to modify. |
bits_to_set | bitmask to apply. |
References ksz8851_reg_read(), and ksz8851_reg_write().
Referenced by ksz8851snl_init(), and ksz8851snl_update().
uint16_t ksz8851_reg_read | ( | uint16_t | reg | ) |
Read a register value.
reg | the register address to modify. |
References CMD_READ, ksz8851snl_master, ksz8851snl_slave, REG_ADDR_MASK, spi_select_slave(), and spi_transceive_buffer_wait().
Referenced by ksz8851_reg_clrbits(), ksz8851_reg_setbits(), ksz8851snl_init(), and ksz8851snl_update().
void ksz8851_reg_setbits | ( | uint16_t | reg, |
uint16_t | bits_to_set | ||
) |
Read register content, set bitmask and write back to register.
reg | the register address to modify. |
bits_to_set | bitmask to apply. |
References ksz8851_reg_read(), and ksz8851_reg_write().
Referenced by ksz8851snl_init(), and ksz8851snl_update().
void ksz8851_reg_write | ( | uint16_t | reg, |
uint16_t | wrdata | ||
) |
Write a register value.
reg | the register address to modify. |
wrdata | the new register value. |
References CMD_WRITE, ksz8851snl_master, ksz8851snl_slave, REG_ADDR_MASK, spi_select_slave(), and spi_transceive_buffer_wait().
Referenced by ksz8851_reg_clrbits(), ksz8851_reg_setbits(), ksz8851snl_init(), and ksz8851snl_update().
uint32_t ksz8851snl_init | ( | void | ) |
Initialize the PHY controller.
Call this function to initialize the hardware interface and the PHY controller. When initialization is done the PHY is turned on and ready to receive data.
References ADDR_PTR_AUTO_INC, BUS_CLOCK_166, BUS_CLOCK_DIVIDEDBY_1, CHIP_ID_8851_16, delay_init(), INT_RX, ksz8851_reg_clrbits(), ksz8851_reg_read(), ksz8851_reg_setbits(), ksz8851_reg_write(), ksz8851snl_hard_reset(), ksz8851snl_interface_init(), PORT_AUTO_NEG_RESTART, PORT_FORCE_FULL_DUPLEX, REG_BUS_CLOCK_CTRL, REG_CHIP_ID, REG_INT_MASK, REG_INT_STATUS, REG_MAC_ADDR_0, REG_MAC_ADDR_2, REG_MAC_ADDR_4, REG_PORT_CTRL, REG_RX_ADDR_PTR, REG_RX_CTRL1, REG_RX_CTRL2, REG_RX_FRAME_CNT_THRES, REG_RXQ_CMD, REG_TX_ADDR_PTR, REG_TX_CTRL, RX_CTRL_ALL_MULTICAST, RX_CTRL_BROADCAST, RX_CTRL_BURST_LEN_FRAME, RX_CTRL_ENABLE, RX_CTRL_FLOW_ENABLE, RX_CTRL_ICMP_CHECKSUM, RX_CTRL_IP_CHECKSUM, RX_CTRL_IPV6_UDP_NOCHECKSUM, RX_CTRL_MAC_FILTER, RX_CTRL_TCP_CHECKSUM, RX_CTRL_UDP_CHECKSUM, RX_CTRL_UDP_LITE_CHECKSUM, RX_CTRL_UNICAST, RXQ_CMD_CNTL, RXQ_TWOBYTE_OFFSET, TX_CTRL_CRC_ENABLE, TX_CTRL_ENABLE, TX_CTRL_FLOW_ENABLE, TX_CTRL_ICMP_CHECKSUM, TX_CTRL_IP_CHECKSUM, TX_CTRL_PAD_ENABLE, TX_CTRL_TCP_CHECKSUM, and TX_CTRL_UDP_CHECKSUM.
Referenced by ksz8851snl_low_level_init().
struct spi_module ksz8851snl_master |
struct spi_slave_inst ksz8851snl_slave |