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#ifndef _REALTEK_H
#define _REALTEK_H
/** @file
*
* Realtek 10/100/1000 network card driver
*
*/
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <ipxe/spi.h>
#include <ipxe/spi_bit.h>
#include <ipxe/nvo.h>
#include <ipxe/if_ether.h>
/** PCI memory BAR size */
#define RTL_BAR_SIZE 0x100
/** A packet descriptor */
struct realtek_descriptor {
/** Buffer size */
uint16_t length;
/** Flags */
uint16_t flags;
/** Reserved */
uint32_t reserved;
/** Buffer address */
uint64_t address;
} __attribute__ (( packed ));
/** Descriptor buffer size mask */
#define RTL_DESC_SIZE_MASK 0x3fff
/** Packet descriptor flags */
enum realtek_descriptor_flags {
/** Descriptor is owned by NIC */
RTL_DESC_OWN = 0x8000,
/** End of descriptor ring */
RTL_DESC_EOR = 0x4000,
/** First segment descriptor */
RTL_DESC_FS = 0x2000,
/** Last segment descriptor */
RTL_DESC_LS = 0x1000,
/** Receive error summary */
RTL_DESC_RES = 0x0020,
};
/** Descriptor ring alignment */
#define RTL_RING_ALIGN 256
/** A legacy mode receive packet header */
struct realtek_legacy_header {
/** Status */
uint16_t status;
/** Length */
uint16_t length;
/** Packet data */
uint8_t data[0];
} __attribute__ (( packed ));
/** Legacy mode status bits */
enum realtek_legacy_status {
/** Received OK */
RTL_STAT_ROK = 0x0001,
};
/** ID Register 0 (6 bytes) */
#define RTL_IDR0 0x00
/** Multicast Register 0 (dword) */
#define RTL_MAR0 0x08
/** Multicast Register 4 (dword) */
#define RTL_MAR4 0x0c
/** Transmit Status of Descriptor N (dword, 8139 only) */
#define RTL_TSD(n) ( 0x10 + 4 * (n) )
#define RTL_TSD_ERTXTH(x) ( (x) << 16 ) /**< Early TX threshold */
#define RTL_TSD_ERTXTH_DEFAULT RTL_TSD_ERTXTH ( 256 / 32 )
#define RTL_TSD_OWN 0x00002000UL /**< Ownership */
/** Transmit Start Address of Descriptor N (dword, 8139 only) */
#define RTL_TSAD(n) ( 0x20 + 4 * (n) )
/** Transmit Normal Priority Descriptors (qword) */
#define RTL_TNPDS 0x20
/** Number of transmit descriptors
*
* This is a hardware limit when using legacy mode.
*/
#define RTL_NUM_TX_DESC 4
/** Receive Buffer Start Address (dword, 8139 only) */
#define RTL_RBSTART 0x30
/** Receive buffer length */
#define RTL_RXBUF_LEN 8192
/** Receive buffer padding */
#define RTL_RXBUF_PAD 2038 /* Allow space for WRAP */
/** Receive buffer alignment */
#define RTL_RXBUF_ALIGN 16
/** Command Register (byte) */
#define RTL_CR 0x37
#define RTL_CR_RST 0x10 /**< Reset */
#define RTL_CR_RE 0x08 /**< Receiver Enable */
#define RTL_CR_TE 0x04 /**< Transmit Enable */
#define RTL_CR_BUFE 0x01 /**< Receive buffer empty */
/** Maximum time to wait for a reset, in milliseconds */
#define RTL_RESET_MAX_WAIT_MS 100
/** Current Address of Packet Read (word, 8139 only) */
#define RTL_CAPR 0x38
/** Transmit Priority Polling Register (byte, 8169 only) */
#define RTL_TPPOLL_8169 0x38
#define RTL_TPPOLL_NPQ 0x40 /**< Normal Priority Queue Polling */
/** Interrupt Mask Register (word) */
#define RTL_IMR 0x3c
#define RTL_IRQ_PUN_LINKCHG 0x0020 /**< Packet underrun / link change */
#define RTL_IRQ_TER 0x0008 /**< Transmit error */
#define RTL_IRQ_TOK 0x0004 /**< Transmit OK */
#define RTL_IRQ_RER 0x0002 /**< Receive error */
#define RTL_IRQ_ROK 0x0001 /**< Receive OK */
/** Interrupt Status Register (word) */
#define RTL_ISR 0x3e
/** Transmit (Tx) Configuration Register (dword) */
#define RTL_TCR 0x40
#define RTL_TCR_MXDMA(x) ( (x) << 8 ) /**< Max DMA burst size */
#define RTL_TCR_MXDMA_MASK RTL_TCR_MXDMA ( 0x7 )
#define RTL_TCR_MXDMA_DEFAULT RTL_TCR_MXDMA ( 0x7 /* Unlimited */ )
/** Receive (Rx) Configuration Register (dword) */
#define RTL_RCR 0x44
#define RTL_RCR_STOP_WORKING 0x01000000UL /**< Here be dragons */
#define RTL_RCR_RXFTH(x) ( (x) << 13 ) /**< Receive FIFO threshold */
#define RTL_RCR_RXFTH_MASK RTL_RCR_RXFTH ( 0x7 )
#define RTL_RCR_RXFTH_DEFAULT RTL_RCR_RXFTH ( 0x7 /* Whole packet */ )
#define RTL_RCR_RBLEN(x) ( (x) << 11 ) /**< Receive buffer length */
#define RTL_RCR_RBLEN_MASK RTL_RCR_RBLEN ( 0x3 )
#define RTL_RCR_RBLEN_DEFAULT RTL_RCR_RBLEN ( 0 /* 8kB */ )
#define RTL_RCR_MXDMA(x) ( (x) << 8 ) /**< Max DMA burst size */
#define RTL_RCR_MXDMA_MASK RTL_RCR_MXDMA ( 0x7 )
#define RTL_RCR_MXDMA_DEFAULT RTL_RCR_MXDMA ( 0x7 /* Unlimited */ )
#define RTL_RCR_WRAP 0x00000080UL /**< Overrun receive buffer */
#define RTL_RCR_9356SEL 0x00000040UL /**< EEPROM is a 93C56 */
#define RTL_RCR_AB 0x00000008UL /**< Accept broadcast packets */
#define RTL_RCR_AM 0x00000004UL /**< Accept multicast packets */
#define RTL_RCR_APM 0x00000002UL /**< Accept physical match */
#define RTL_RCR_AAP 0x00000001UL /**< Accept all packets */
/** 93C46 (93C56) Command Register (byte) */
#define RTL_9346CR 0x50
#define RTL_9346CR_EEM(x) ( (x) << 6 ) /**< Mode select */
#define RTL_9346CR_EEM_EEPROM RTL_9346CR_EEM ( 0x2 ) /**< EEPROM mode */
#define RTL_9346CR_EEM_NORMAL RTL_9346CR_EEM ( 0x0 ) /**< Normal mode */
#define RTL_9346CR_EECS 0x08 /**< Chip select */
#define RTL_9346CR_EESK 0x04 /**< Clock */
#define RTL_9346CR_EEDI 0x02 /**< Data in */
#define RTL_9346CR_EEDO 0x01 /**< Data out */
/** Word offset of ID code word within EEPROM */
#define RTL_EEPROM_ID ( 0x00 / 2 )
/** EEPROM code word magic value */
#define RTL_EEPROM_ID_MAGIC 0x8129
/** Word offset of MAC address within EEPROM */
#define RTL_EEPROM_MAC ( 0x0e / 2 )
/** Word offset of VPD / non-volatile options within EEPROM */
#define RTL_EEPROM_VPD ( 0x40 / 2 )
/** Length of VPD / non-volatile options within EEPROM */
#define RTL_EEPROM_VPD_LEN 0x40
/** Configuration Register 1 (byte) */
#define RTL_CONFIG1 0x52
#define RTL_CONFIG1_VPD 0x02 /**< Vital Product Data enabled */
/** Media Status Register (byte, 8139 only) */
#define RTL_MSR 0x58
#define RTL_MSR_TXFCE 0x80 /**< TX flow control enabled */
#define RTL_MSR_RXFCE 0x40 /**< RX flow control enabled */
#define RTL_MSR_AUX_STATUS 0x10 /**< Aux power present */
#define RTL_MSR_SPEED_10 0x08 /**< 10Mbps */
#define RTL_MSR_LINKB 0x04 /**< Inverse of link status */
#define RTL_MSR_TXPF 0x02 /**< TX pause flag */
#define RTL_MSR_RXPF 0x01 /**< RX pause flag */
/** PHY Access Register (dword, 8169 only) */
#define RTL_PHYAR 0x60
#define RTL_PHYAR_FLAG 0x80000000UL /**< Read/write flag */
/** Construct PHY Access Register value */
#define RTL_PHYAR_VALUE( flag, reg, data ) ( (flag) | ( (reg) << 16 ) | (data) )
/** Extract PHY Access Register data */
#define RTL_PHYAR_DATA( value ) ( (value) & 0xffff )
/** Maximum time to wait for PHY access, in microseconds */
#define RTL_MII_MAX_WAIT_US 500
/** PHY (GMII, MII, or TBI) Status Register (byte, 8169 only) */
#define RTL_PHYSTATUS 0x6c
#define RTL_PHYSTATUS_ENTBI 0x80 /**< TBI / GMII mode */
#define RTL_PHYSTATUS_TXFLOW 0x40 /**< TX flow control enabled */
#define RTL_PHYSTATUS_RXFLOW 0x20 /**< RX flow control enabled */
#define RTL_PHYSTATUS_1000MF 0x10 /**< 1000Mbps full-duplex */
#define RTL_PHYSTATUS_100M 0x08 /**< 100Mbps */
#define RTL_PHYSTATUS_10M 0x04 /**< 10Mbps */
#define RTL_PHYSTATUS_LINKSTS 0x02 /**< Link ok */
#define RTL_PHYSTATUS_FULLDUP 0x01 /**< Full duplex */
/** Transmit Priority Polling Register (byte, 8139C+ only) */
#define RTL_TPPOLL_8139CP 0xd9
/** RX Packet Maximum Size Register (word) */
#define RTL_RMS 0xda
/** C+ Command Register (word) */
#define RTL_CPCR 0xe0
#define RTL_CPCR_DAC 0x0010 /**< PCI Dual Address Cycle Enable */
#define RTL_CPCR_MULRW 0x0008 /**< PCI Multiple Read/Write Enable */
#define RTL_CPCR_CPRX 0x0002 /**< C+ receive enable */
#define RTL_CPCR_CPTX 0x0001 /**< C+ transmit enable */
/** Receive Descriptor Start Address Register (qword) */
#define RTL_RDSAR 0xe4
/** Number of receive descriptors */
#define RTL_NUM_RX_DESC 4
/** Receive buffer length */
#define RTL_RX_MAX_LEN \
( ETH_FRAME_LEN + 4 /* VLAN */ + 4 /* CRC */ + 4 /* extra space */ )
/** A Realtek descriptor ring */
struct realtek_ring {
/** Descriptors */
struct realtek_descriptor *desc;
/** Producer index */
unsigned int prod;
/** Consumer index */
unsigned int cons;
/** Descriptor start address register */
unsigned int reg;
/** Length (in bytes) */
size_t len;
};
/**
* Initialise descriptor ring
*
* @v ring Descriptor ring
* @v count Number of descriptors
* @v reg Descriptor start address register
*/
static inline __attribute__ (( always_inline)) void
realtek_init_ring ( struct realtek_ring *ring, unsigned int count,
unsigned int reg ) {
ring->len = ( count * sizeof ( ring->desc[0] ) );
ring->reg = reg;
}
/** A Realtek network card */
struct realtek_nic {
/** Registers */
void *regs;
/** SPI bit-bashing interface */
struct spi_bit_basher spibit;
/** EEPROM */
struct spi_device eeprom;
/** Non-volatile options */
struct nvo_block nvo;
/** MII interface */
struct mii_interface mdio;
/** MII device */
struct mii_device mii;
/** Legacy datapath mode */
int legacy;
/** PHYAR and PHYSTATUS registers are present */
int have_phy_regs;
/** TPPoll register offset */
unsigned int tppoll;
/** Transmit descriptor ring */
struct realtek_ring tx;
/** Receive descriptor ring */
struct realtek_ring rx;
/** Receive I/O buffers */
struct io_buffer *rx_iobuf[RTL_NUM_RX_DESC];
/** Receive buffer (legacy mode) */
void *rx_buffer;
/** Offset within receive buffer (legacy mode) */
unsigned int rx_offset;
};
#endif /* _REALTEK_H */
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