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/*
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* SMSC LAN9118 Ethernet interface emulation
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*
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* Copyright (c) 2009 CodeSourcery, LLC.
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* Written by Paul Brook
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*
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* This code is licenced under the GNU GPL v2
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*/
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#include "sysbus.h" |
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#include "net.h" |
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#include "devices.h" |
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/* For crc32 */
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#include <zlib.h> |
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|
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//#define DEBUG_LAN9118
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|
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#ifdef DEBUG_LAN9118
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#define DPRINTF(fmt, ...) \
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do { printf("lan9118: " fmt , ## __VA_ARGS__); } while (0) |
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#define BADF(fmt, ...) \
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do { hw_error("lan9118: error: " fmt , ## __VA_ARGS__);} while (0) |
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#else
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#define DPRINTF(fmt, ...) do {} while(0) |
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#define BADF(fmt, ...) \
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do { fprintf(stderr, "lan9118: error: " fmt , ## __VA_ARGS__);} while (0) |
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#endif
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|
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#define CSR_ID_REV 0x50 |
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#define CSR_IRQ_CFG 0x54 |
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#define CSR_INT_STS 0x58 |
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#define CSR_INT_EN 0x5c |
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#define CSR_BYTE_TEST 0x64 |
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#define CSR_FIFO_INT 0x68 |
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#define CSR_RX_CFG 0x6c |
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#define CSR_TX_CFG 0x70 |
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#define CSR_HW_CFG 0x74 |
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#define CSR_RX_DP_CTRL 0x78 |
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#define CSR_RX_FIFO_INF 0x7c |
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#define CSR_TX_FIFO_INF 0x80 |
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#define CSR_PMT_CTRL 0x84 |
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#define CSR_GPIO_CFG 0x88 |
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#define CSR_GPT_CFG 0x8c |
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#define CSR_GPT_CNT 0x90 |
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#define CSR_WORD_SWAP 0x98 |
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#define CSR_FREE_RUN 0x9c |
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#define CSR_RX_DROP 0xa0 |
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#define CSR_MAC_CSR_CMD 0xa4 |
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#define CSR_MAC_CSR_DATA 0xa8 |
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#define CSR_AFC_CFG 0xac |
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#define CSR_E2P_CMD 0xb0 |
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#define CSR_E2P_DATA 0xb4 |
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|
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/* IRQ_CFG */
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#define IRQ_INT 0x00001000 |
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#define IRQ_EN 0x00000100 |
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#define IRQ_POL 0x00000010 |
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#define IRQ_TYPE 0x00000001 |
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|
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/* INT_STS/INT_EN */
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#define SW_INT 0x80000000 |
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#define TXSTOP_INT 0x02000000 |
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#define RXSTOP_INT 0x01000000 |
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#define RXDFH_INT 0x00800000 |
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#define TX_IOC_INT 0x00200000 |
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#define RXD_INT 0x00100000 |
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#define GPT_INT 0x00080000 |
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#define PHY_INT 0x00040000 |
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#define PME_INT 0x00020000 |
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#define TXSO_INT 0x00010000 |
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#define RWT_INT 0x00008000 |
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#define RXE_INT 0x00004000 |
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#define TXE_INT 0x00002000 |
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#define TDFU_INT 0x00000800 |
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#define TDFO_INT 0x00000400 |
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#define TDFA_INT 0x00000200 |
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#define TSFF_INT 0x00000100 |
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#define TSFL_INT 0x00000080 |
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#define RXDF_INT 0x00000040 |
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#define RDFL_INT 0x00000020 |
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#define RSFF_INT 0x00000010 |
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#define RSFL_INT 0x00000008 |
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#define GPIO2_INT 0x00000004 |
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#define GPIO1_INT 0x00000002 |
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#define GPIO0_INT 0x00000001 |
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#define RESERVED_INT 0x7c001000 |
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|
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#define MAC_CR 1 |
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#define MAC_ADDRH 2 |
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#define MAC_ADDRL 3 |
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#define MAC_HASHH 4 |
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#define MAC_HASHL 5 |
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#define MAC_MII_ACC 6 |
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#define MAC_MII_DATA 7 |
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#define MAC_FLOW 8 |
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#define MAC_VLAN1 9 /* TODO */ |
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#define MAC_VLAN2 10 /* TODO */ |
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#define MAC_WUFF 11 /* TODO */ |
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#define MAC_WUCSR 12 /* TODO */ |
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|
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#define MAC_CR_RXALL 0x80000000 |
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#define MAC_CR_RCVOWN 0x00800000 |
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#define MAC_CR_LOOPBK 0x00200000 |
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#define MAC_CR_FDPX 0x00100000 |
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#define MAC_CR_MCPAS 0x00080000 |
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#define MAC_CR_PRMS 0x00040000 |
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#define MAC_CR_INVFILT 0x00020000 |
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#define MAC_CR_PASSBAD 0x00010000 |
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#define MAC_CR_HO 0x00008000 |
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#define MAC_CR_HPFILT 0x00002000 |
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#define MAC_CR_LCOLL 0x00001000 |
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#define MAC_CR_BCAST 0x00000800 |
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#define MAC_CR_DISRTY 0x00000400 |
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#define MAC_CR_PADSTR 0x00000100 |
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#define MAC_CR_BOLMT 0x000000c0 |
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#define MAC_CR_DFCHK 0x00000020 |
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#define MAC_CR_TXEN 0x00000008 |
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#define MAC_CR_RXEN 0x00000004 |
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#define MAC_CR_RESERVED 0x7f404213 |
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|
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#define PHY_INT_ENERGYON 0x80 |
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#define PHY_INT_AUTONEG_COMPLETE 0x40 |
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#define PHY_INT_FAULT 0x20 |
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#define PHY_INT_DOWN 0x10 |
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#define PHY_INT_AUTONEG_LP 0x08 |
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#define PHY_INT_PARFAULT 0x04 |
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#define PHY_INT_AUTONEG_PAGE 0x02 |
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|
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#define GPT_TIMER_EN 0x20000000 |
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enum tx_state {
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TX_IDLE, |
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TX_B, |
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TX_DATA |
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}; |
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typedef struct { |
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enum tx_state state;
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uint32_t cmd_a; |
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uint32_t cmd_b; |
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int buffer_size;
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int offset;
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int pad;
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int fifo_used;
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int len;
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uint8_t data[2048];
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} LAN9118Packet; |
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typedef struct { |
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SysBusDevice busdev; |
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NICState *nic; |
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NICConf conf; |
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qemu_irq irq; |
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int mmio_index;
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ptimer_state *timer; |
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|
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uint32_t irq_cfg; |
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uint32_t int_sts; |
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uint32_t int_en; |
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uint32_t fifo_int; |
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uint32_t rx_cfg; |
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uint32_t tx_cfg; |
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uint32_t hw_cfg; |
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uint32_t pmt_ctrl; |
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uint32_t gpio_cfg; |
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uint32_t gpt_cfg; |
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uint32_t word_swap; |
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uint32_t free_timer_start; |
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uint32_t mac_cmd; |
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uint32_t mac_data; |
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uint32_t afc_cfg; |
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uint32_t e2p_cmd; |
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uint32_t e2p_data; |
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|
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uint32_t mac_cr; |
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uint32_t mac_hashh; |
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uint32_t mac_hashl; |
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uint32_t mac_mii_acc; |
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uint32_t mac_mii_data; |
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uint32_t mac_flow; |
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uint32_t phy_status; |
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uint32_t phy_control; |
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uint32_t phy_advertise; |
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uint32_t phy_int; |
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uint32_t phy_int_mask; |
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int eeprom_writable;
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uint8_t eeprom[8];
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int tx_fifo_size;
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LAN9118Packet *txp; |
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LAN9118Packet tx_packet; |
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int tx_status_fifo_used;
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int tx_status_fifo_head;
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uint32_t tx_status_fifo[512];
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int rx_status_fifo_size;
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int rx_status_fifo_used;
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int rx_status_fifo_head;
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uint32_t rx_status_fifo[896];
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int rx_fifo_size;
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int rx_fifo_used;
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int rx_fifo_head;
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uint32_t rx_fifo[3360];
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int rx_packet_size_head;
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int rx_packet_size_tail;
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int rx_packet_size[1024]; |
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int rxp_offset;
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int rxp_size;
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int rxp_pad;
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} lan9118_state; |
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static void lan9118_update(lan9118_state *s) |
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{ |
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int level;
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/* TODO: Implement FIFO level IRQs. */
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level = (s->int_sts & s->int_en) != 0;
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if (level) {
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s->irq_cfg |= IRQ_INT; |
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} else {
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s->irq_cfg &= ~IRQ_INT; |
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} |
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if ((s->irq_cfg & IRQ_EN) == 0) { |
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level = 0;
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} |
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qemu_set_irq(s->irq, level); |
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} |
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static void lan9118_mac_changed(lan9118_state *s) |
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{ |
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qemu_format_nic_info_str(&s->nic->nc, s->conf.macaddr.a); |
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} |
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static void lan9118_reload_eeprom(lan9118_state *s) |
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{ |
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int i;
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if (s->eeprom[0] != 0xa5) { |
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s->e2p_cmd &= ~0x10;
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DPRINTF("MACADDR load failed\n");
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return;
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} |
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for (i = 0; i < 6; i++) { |
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s->conf.macaddr.a[i] = s->eeprom[i + 1];
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} |
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s->e2p_cmd |= 0x10;
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DPRINTF("MACADDR loaded from eeprom\n");
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lan9118_mac_changed(s); |
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} |
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static void phy_update_irq(lan9118_state *s) |
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{ |
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if (s->phy_int & s->phy_int_mask) {
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s->int_sts |= PHY_INT; |
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} else {
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s->int_sts &= ~PHY_INT; |
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} |
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lan9118_update(s); |
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} |
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static void phy_update_link(lan9118_state *s) |
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{ |
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/* Autonegotiation status mirrors link status. */
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if (s->nic->nc.link_down) {
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s->phy_status &= ~0x0024;
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s->phy_int |= PHY_INT_DOWN; |
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} else {
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s->phy_status |= 0x0024;
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s->phy_int |= PHY_INT_ENERGYON; |
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s->phy_int |= PHY_INT_AUTONEG_COMPLETE; |
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} |
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phy_update_irq(s); |
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} |
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static void lan9118_set_link(VLANClientState *nc) |
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{ |
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phy_update_link(DO_UPCAST(NICState, nc, nc)->opaque); |
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} |
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static void phy_reset(lan9118_state *s) |
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{ |
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s->phy_status = 0x7809;
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s->phy_control = 0x3000;
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s->phy_advertise = 0x01e1;
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s->phy_int_mask = 0;
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s->phy_int = 0;
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phy_update_link(s); |
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} |
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static void lan9118_reset(DeviceState *d) |
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{ |
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lan9118_state *s = FROM_SYSBUS(lan9118_state, sysbus_from_qdev(d)); |
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s->irq_cfg &= ~(IRQ_TYPE | IRQ_POL); |
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s->int_sts = 0;
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s->int_en = 0;
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s->fifo_int = 0x48000000;
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s->rx_cfg = 0;
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s->tx_cfg = 0;
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s->hw_cfg = 0x00050000;
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s->pmt_ctrl &= 0x45;
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s->gpio_cfg = 0;
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s->txp->fifo_used = 0;
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s->txp->state = TX_IDLE; |
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s->txp->cmd_a = 0xffffffffu;
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s->txp->cmd_b = 0xffffffffu;
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s->txp->len = 0;
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s->txp->fifo_used = 0;
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s->tx_fifo_size = 4608;
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s->tx_status_fifo_used = 0;
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s->rx_status_fifo_size = 704;
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s->rx_fifo_size = 2640;
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s->rx_fifo_used = 0;
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s->rx_status_fifo_size = 176;
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s->rx_status_fifo_used = 0;
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s->rxp_offset = 0;
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s->rxp_size = 0;
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s->rxp_pad = 0;
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s->rx_packet_size_tail = s->rx_packet_size_head; |
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s->rx_packet_size[s->rx_packet_size_head] = 0;
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s->mac_cmd = 0;
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s->mac_data = 0;
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s->afc_cfg = 0;
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s->e2p_cmd = 0;
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s->e2p_data = 0;
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s->free_timer_start = qemu_get_clock(vm_clock) / 40;
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ptimer_stop(s->timer); |
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ptimer_set_count(s->timer, 0xffff);
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s->gpt_cfg = 0xffff;
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|
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s->mac_cr = MAC_CR_PRMS; |
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s->mac_hashh = 0;
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s->mac_hashl = 0;
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s->mac_mii_acc = 0;
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s->mac_mii_data = 0;
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s->mac_flow = 0;
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phy_reset(s); |
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|
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s->eeprom_writable = 0;
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lan9118_reload_eeprom(s); |
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} |
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|
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static int lan9118_can_receive(VLANClientState *nc) |
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{ |
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return 1; |
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} |
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|
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static void rx_fifo_push(lan9118_state *s, uint32_t val) |
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{ |
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int fifo_pos;
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fifo_pos = s->rx_fifo_head + s->rx_fifo_used; |
357 |
if (fifo_pos >= s->rx_fifo_size)
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fifo_pos -= s->rx_fifo_size; |
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s->rx_fifo[fifo_pos] = val; |
360 |
s->rx_fifo_used++; |
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} |
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|
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/* Return nonzero if the packet is accepted by the filter. */
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static int lan9118_filter(lan9118_state *s, const uint8_t *addr) |
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{ |
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int multicast;
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uint32_t hash; |
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|
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if (s->mac_cr & MAC_CR_PRMS) {
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return 1; |
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} |
372 |
if (addr[0] == 0xff && addr[1] == 0xff && addr[2] == 0xff && |
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addr[3] == 0xff && addr[4] == 0xff && addr[5] == 0xff) { |
374 |
return (s->mac_cr & MAC_CR_BCAST) == 0; |
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} |
376 |
|
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multicast = addr[0] & 1; |
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if (multicast &&s->mac_cr & MAC_CR_MCPAS) {
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return 1; |
380 |
} |
381 |
if (multicast ? (s->mac_cr & MAC_CR_HPFILT) == 0 |
382 |
: (s->mac_cr & MAC_CR_HO) == 0) {
|
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/* Exact matching. */
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hash = memcmp(addr, s->conf.macaddr.a, 6);
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if (s->mac_cr & MAC_CR_INVFILT) {
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return hash != 0; |
387 |
} else {
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return hash == 0; |
389 |
} |
390 |
} else {
|
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/* Hash matching */
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hash = (crc32(~0, addr, 6) >> 26); |
393 |
if (hash & 0x20) { |
394 |
return (s->mac_hashh >> (hash & 0x1f)) & 1; |
395 |
} else {
|
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return (s->mac_hashl >> (hash & 0x1f)) & 1; |
397 |
} |
398 |
} |
399 |
} |
400 |
|
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static ssize_t lan9118_receive(VLANClientState *nc, const uint8_t *buf, |
402 |
size_t size) |
403 |
{ |
404 |
lan9118_state *s = DO_UPCAST(NICState, nc, nc)->opaque; |
405 |
int fifo_len;
|
406 |
int offset;
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407 |
int src_pos;
|
408 |
int n;
|
409 |
int filter;
|
410 |
uint32_t val; |
411 |
uint32_t crc; |
412 |
uint32_t status; |
413 |
|
414 |
if ((s->mac_cr & MAC_CR_RXEN) == 0) { |
415 |
return -1; |
416 |
} |
417 |
|
418 |
if (size >= 2048 || size < 14) { |
419 |
return -1; |
420 |
} |
421 |
|
422 |
/* TODO: Implement FIFO overflow notification. */
|
423 |
if (s->rx_status_fifo_used == s->rx_status_fifo_size) {
|
424 |
return -1; |
425 |
} |
426 |
|
427 |
filter = lan9118_filter(s, buf); |
428 |
if (!filter && (s->mac_cr & MAC_CR_RXALL) == 0) { |
429 |
return size;
|
430 |
} |
431 |
|
432 |
offset = (s->rx_cfg >> 8) & 0x1f; |
433 |
n = offset & 3;
|
434 |
fifo_len = (size + n + 3) >> 2; |
435 |
/* Add a word for the CRC. */
|
436 |
fifo_len++; |
437 |
if (s->rx_fifo_size - s->rx_fifo_used < fifo_len) {
|
438 |
return -1; |
439 |
} |
440 |
|
441 |
DPRINTF("Got packet len:%d fifo:%d filter:%s\n",
|
442 |
(int)size, fifo_len, filter ? "pass" : "fail"); |
443 |
val = 0;
|
444 |
crc = bswap32(crc32(~0, buf, size));
|
445 |
for (src_pos = 0; src_pos < size; src_pos++) { |
446 |
val = (val >> 8) | ((uint32_t)buf[src_pos] << 24); |
447 |
n++; |
448 |
if (n == 4) { |
449 |
n = 0;
|
450 |
rx_fifo_push(s, val); |
451 |
val = 0;
|
452 |
} |
453 |
} |
454 |
if (n) {
|
455 |
val >>= ((4 - n) * 8); |
456 |
val |= crc << (n * 8);
|
457 |
rx_fifo_push(s, val); |
458 |
val = crc >> ((4 - n) * 8); |
459 |
rx_fifo_push(s, val); |
460 |
} else {
|
461 |
rx_fifo_push(s, crc); |
462 |
} |
463 |
n = s->rx_status_fifo_head + s->rx_status_fifo_used; |
464 |
if (n >= s->rx_status_fifo_size) {
|
465 |
n -= s->rx_status_fifo_size; |
466 |
} |
467 |
s->rx_packet_size[s->rx_packet_size_tail] = fifo_len; |
468 |
s->rx_packet_size_tail = (s->rx_packet_size_tail + 1023) & 1023; |
469 |
s->rx_status_fifo_used++; |
470 |
|
471 |
status = (size + 4) << 16; |
472 |
if (buf[0] == 0xff && buf[1] == 0xff && buf[2] == 0xff && |
473 |
buf[3] == 0xff && buf[4] == 0xff && buf[5] == 0xff) { |
474 |
status |= 0x00002000;
|
475 |
} else if (buf[0] & 1) { |
476 |
status |= 0x00000400;
|
477 |
} |
478 |
if (!filter) {
|
479 |
status |= 0x40000000;
|
480 |
} |
481 |
s->rx_status_fifo[n] = status; |
482 |
|
483 |
if (s->rx_status_fifo_used > (s->fifo_int & 0xff)) { |
484 |
s->int_sts |= RSFL_INT; |
485 |
} |
486 |
lan9118_update(s); |
487 |
|
488 |
return size;
|
489 |
} |
490 |
|
491 |
static uint32_t rx_fifo_pop(lan9118_state *s)
|
492 |
{ |
493 |
int n;
|
494 |
uint32_t val; |
495 |
|
496 |
if (s->rxp_size == 0 && s->rxp_pad == 0) { |
497 |
s->rxp_size = s->rx_packet_size[s->rx_packet_size_head]; |
498 |
s->rx_packet_size[s->rx_packet_size_head] = 0;
|
499 |
if (s->rxp_size != 0) { |
500 |
s->rx_packet_size_head = (s->rx_packet_size_head + 1023) & 1023; |
501 |
s->rxp_offset = (s->rx_cfg >> 10) & 7; |
502 |
n = s->rxp_offset + s->rxp_size; |
503 |
switch (s->rx_cfg >> 30) { |
504 |
case 1: |
505 |
n = (-n) & 3;
|
506 |
break;
|
507 |
case 2: |
508 |
n = (-n) & 7;
|
509 |
break;
|
510 |
default:
|
511 |
n = 0;
|
512 |
break;
|
513 |
} |
514 |
s->rxp_pad = n; |
515 |
DPRINTF("Pop packet size:%d offset:%d pad: %d\n",
|
516 |
s->rxp_size, s->rxp_offset, s->rxp_pad); |
517 |
} |
518 |
} |
519 |
if (s->rxp_offset > 0) { |
520 |
s->rxp_offset--; |
521 |
val = 0;
|
522 |
} else if (s->rxp_size > 0) { |
523 |
s->rxp_size--; |
524 |
val = s->rx_fifo[s->rx_fifo_head++]; |
525 |
if (s->rx_fifo_head >= s->rx_fifo_size) {
|
526 |
s->rx_fifo_head -= s->rx_fifo_size; |
527 |
} |
528 |
s->rx_fifo_used--; |
529 |
} else if (s->rxp_pad > 0) { |
530 |
s->rxp_pad--; |
531 |
val = 0;
|
532 |
} else {
|
533 |
DPRINTF("RX underflow\n");
|
534 |
s->int_sts |= RXE_INT; |
535 |
val = 0;
|
536 |
} |
537 |
lan9118_update(s); |
538 |
return val;
|
539 |
} |
540 |
|
541 |
static void do_tx_packet(lan9118_state *s) |
542 |
{ |
543 |
int n;
|
544 |
uint32_t status; |
545 |
|
546 |
/* FIXME: Honor TX disable, and allow queueing of packets. */
|
547 |
if (s->phy_control & 0x4000) { |
548 |
/* This assumes the receive routine doesn't touch the VLANClient. */
|
549 |
lan9118_receive(&s->nic->nc, s->txp->data, s->txp->len); |
550 |
} else {
|
551 |
qemu_send_packet(&s->nic->nc, s->txp->data, s->txp->len); |
552 |
} |
553 |
s->txp->fifo_used = 0;
|
554 |
|
555 |
if (s->tx_status_fifo_used == 512) { |
556 |
/* Status FIFO full */
|
557 |
return;
|
558 |
} |
559 |
/* Add entry to status FIFO. */
|
560 |
status = s->txp->cmd_b & 0xffff0000u;
|
561 |
DPRINTF("Sent packet tag:%04x len %d\n", status >> 16, s->txp->len); |
562 |
n = (s->tx_status_fifo_head + s->tx_status_fifo_used) & 511;
|
563 |
s->tx_status_fifo[n] = status; |
564 |
s->tx_status_fifo_used++; |
565 |
if (s->tx_status_fifo_used == 512) { |
566 |
s->int_sts |= TSFF_INT; |
567 |
/* TODO: Stop transmission. */
|
568 |
} |
569 |
} |
570 |
|
571 |
static uint32_t rx_status_fifo_pop(lan9118_state *s)
|
572 |
{ |
573 |
uint32_t val; |
574 |
|
575 |
val = s->rx_status_fifo[s->rx_status_fifo_head]; |
576 |
if (s->rx_status_fifo_used != 0) { |
577 |
s->rx_status_fifo_used--; |
578 |
s->rx_status_fifo_head++; |
579 |
if (s->rx_status_fifo_head >= s->rx_status_fifo_size) {
|
580 |
s->rx_status_fifo_head -= s->rx_status_fifo_size; |
581 |
} |
582 |
/* ??? What value should be returned when the FIFO is empty? */
|
583 |
DPRINTF("RX status pop 0x%08x\n", val);
|
584 |
} |
585 |
return val;
|
586 |
} |
587 |
|
588 |
static uint32_t tx_status_fifo_pop(lan9118_state *s)
|
589 |
{ |
590 |
uint32_t val; |
591 |
|
592 |
val = s->tx_status_fifo[s->tx_status_fifo_head]; |
593 |
if (s->tx_status_fifo_used != 0) { |
594 |
s->tx_status_fifo_used--; |
595 |
s->tx_status_fifo_head = (s->tx_status_fifo_head + 1) & 511; |
596 |
/* ??? What value should be returned when the FIFO is empty? */
|
597 |
} |
598 |
return val;
|
599 |
} |
600 |
|
601 |
static void tx_fifo_push(lan9118_state *s, uint32_t val) |
602 |
{ |
603 |
int n;
|
604 |
|
605 |
if (s->txp->fifo_used == s->tx_fifo_size) {
|
606 |
s->int_sts |= TDFO_INT; |
607 |
return;
|
608 |
} |
609 |
switch (s->txp->state) {
|
610 |
case TX_IDLE:
|
611 |
s->txp->cmd_a = val & 0x831f37ff;
|
612 |
s->txp->fifo_used++; |
613 |
s->txp->state = TX_B; |
614 |
break;
|
615 |
case TX_B:
|
616 |
if (s->txp->cmd_a & 0x2000) { |
617 |
/* First segment */
|
618 |
s->txp->cmd_b = val; |
619 |
s->txp->fifo_used++; |
620 |
s->txp->buffer_size = s->txp->cmd_a & 0x7ff;
|
621 |
s->txp->offset = (s->txp->cmd_a >> 16) & 0x1f; |
622 |
/* End alignment does not include command words. */
|
623 |
n = (s->txp->buffer_size + s->txp->offset + 3) >> 2; |
624 |
switch ((n >> 24) & 3) { |
625 |
case 1: |
626 |
n = (-n) & 3;
|
627 |
break;
|
628 |
case 2: |
629 |
n = (-n) & 7;
|
630 |
break;
|
631 |
default:
|
632 |
n = 0;
|
633 |
} |
634 |
s->txp->pad = n; |
635 |
s->txp->len = 0;
|
636 |
} |
637 |
DPRINTF("Block len:%d offset:%d pad:%d cmd %08x\n",
|
638 |
s->txp->buffer_size, s->txp->offset, s->txp->pad, |
639 |
s->txp->cmd_a); |
640 |
s->txp->state = TX_DATA; |
641 |
break;
|
642 |
case TX_DATA:
|
643 |
if (s->txp->offset >= 4) { |
644 |
s->txp->offset -= 4;
|
645 |
break;
|
646 |
} |
647 |
if (s->txp->buffer_size <= 0 && s->txp->pad != 0) { |
648 |
s->txp->pad--; |
649 |
} else {
|
650 |
n = 4;
|
651 |
while (s->txp->offset) {
|
652 |
val >>= 8;
|
653 |
n--; |
654 |
s->txp->offset--; |
655 |
} |
656 |
/* Documentation is somewhat unclear on the ordering of bytes
|
657 |
in FIFO words. Empirical results show it to be little-endian.
|
658 |
*/
|
659 |
/* TODO: FIFO overflow checking. */
|
660 |
while (n--) {
|
661 |
s->txp->data[s->txp->len] = val & 0xff;
|
662 |
s->txp->len++; |
663 |
val >>= 8;
|
664 |
s->txp->buffer_size--; |
665 |
} |
666 |
s->txp->fifo_used++; |
667 |
} |
668 |
if (s->txp->buffer_size <= 0 && s->txp->pad == 0) { |
669 |
if (s->txp->cmd_a & 0x1000) { |
670 |
do_tx_packet(s); |
671 |
} |
672 |
if (s->txp->cmd_a & 0x80000000) { |
673 |
s->int_sts |= TX_IOC_INT; |
674 |
} |
675 |
s->txp->state = TX_IDLE; |
676 |
} |
677 |
break;
|
678 |
} |
679 |
} |
680 |
|
681 |
static uint32_t do_phy_read(lan9118_state *s, int reg) |
682 |
{ |
683 |
uint32_t val; |
684 |
|
685 |
switch (reg) {
|
686 |
case 0: /* Basic Control */ |
687 |
return s->phy_control;
|
688 |
case 1: /* Basic Status */ |
689 |
return s->phy_status;
|
690 |
case 2: /* ID1 */ |
691 |
return 0x0007; |
692 |
case 3: /* ID2 */ |
693 |
return 0xc0d1; |
694 |
case 4: /* Auto-neg advertisment */ |
695 |
return s->phy_advertise;
|
696 |
case 5: /* Auto-neg Link Partner Ability */ |
697 |
return 0x0f71; |
698 |
case 6: /* Auto-neg Expansion */ |
699 |
return 1; |
700 |
/* TODO 17, 18, 27, 29, 30, 31 */
|
701 |
case 29: /* Interrupt source. */ |
702 |
val = s->phy_int; |
703 |
s->phy_int = 0;
|
704 |
phy_update_irq(s); |
705 |
return val;
|
706 |
case 30: /* Interrupt mask */ |
707 |
return s->phy_int_mask;
|
708 |
default:
|
709 |
BADF("PHY read reg %d\n", reg);
|
710 |
return 0; |
711 |
} |
712 |
} |
713 |
|
714 |
static void do_phy_write(lan9118_state *s, int reg, uint32_t val) |
715 |
{ |
716 |
switch (reg) {
|
717 |
case 0: /* Basic Control */ |
718 |
if (val & 0x8000) { |
719 |
phy_reset(s); |
720 |
break;
|
721 |
} |
722 |
s->phy_control = val & 0x7980;
|
723 |
/* Complete autonegotiation imediately. */
|
724 |
if (val & 0x1000) { |
725 |
s->phy_status |= 0x0020;
|
726 |
} |
727 |
break;
|
728 |
case 4: /* Auto-neg advertisment */ |
729 |
s->phy_advertise = (val & 0x2d7f) | 0x80; |
730 |
break;
|
731 |
/* TODO 17, 18, 27, 31 */
|
732 |
case 30: /* Interrupt mask */ |
733 |
s->phy_int_mask = val & 0xff;
|
734 |
phy_update_irq(s); |
735 |
break;
|
736 |
default:
|
737 |
BADF("PHY write reg %d = 0x%04x\n", reg, val);
|
738 |
} |
739 |
} |
740 |
|
741 |
static void do_mac_write(lan9118_state *s, int reg, uint32_t val) |
742 |
{ |
743 |
switch (reg) {
|
744 |
case MAC_CR:
|
745 |
if ((s->mac_cr & MAC_CR_RXEN) != 0 && (val & MAC_CR_RXEN) == 0) { |
746 |
s->int_sts |= RXSTOP_INT; |
747 |
} |
748 |
s->mac_cr = val & ~MAC_CR_RESERVED; |
749 |
DPRINTF("MAC_CR: %08x\n", val);
|
750 |
break;
|
751 |
case MAC_ADDRH:
|
752 |
s->conf.macaddr.a[4] = val & 0xff; |
753 |
s->conf.macaddr.a[5] = (val >> 8) & 0xff; |
754 |
lan9118_mac_changed(s); |
755 |
break;
|
756 |
case MAC_ADDRL:
|
757 |
s->conf.macaddr.a[0] = val & 0xff; |
758 |
s->conf.macaddr.a[1] = (val >> 8) & 0xff; |
759 |
s->conf.macaddr.a[2] = (val >> 16) & 0xff; |
760 |
s->conf.macaddr.a[3] = (val >> 24) & 0xff; |
761 |
lan9118_mac_changed(s); |
762 |
break;
|
763 |
case MAC_HASHH:
|
764 |
s->mac_hashh = val; |
765 |
break;
|
766 |
case MAC_HASHL:
|
767 |
s->mac_hashl = val; |
768 |
break;
|
769 |
case MAC_MII_ACC:
|
770 |
s->mac_mii_acc = val & 0xffc2;
|
771 |
if (val & 2) { |
772 |
DPRINTF("PHY write %d = 0x%04x\n",
|
773 |
(val >> 6) & 0x1f, s->mac_mii_data); |
774 |
do_phy_write(s, (val >> 6) & 0x1f, s->mac_mii_data); |
775 |
} else {
|
776 |
s->mac_mii_data = do_phy_read(s, (val >> 6) & 0x1f); |
777 |
DPRINTF("PHY read %d = 0x%04x\n",
|
778 |
(val >> 6) & 0x1f, s->mac_mii_data); |
779 |
} |
780 |
break;
|
781 |
case MAC_MII_DATA:
|
782 |
s->mac_mii_data = val & 0xffff;
|
783 |
break;
|
784 |
case MAC_FLOW:
|
785 |
s->mac_flow = val & 0xffff0000;
|
786 |
break;
|
787 |
default:
|
788 |
hw_error("lan9118: Unimplemented MAC register write: %d = 0x%x\n",
|
789 |
s->mac_cmd & 0xf, val);
|
790 |
} |
791 |
} |
792 |
|
793 |
static uint32_t do_mac_read(lan9118_state *s, int reg) |
794 |
{ |
795 |
switch (reg) {
|
796 |
case MAC_CR:
|
797 |
return s->mac_cr;
|
798 |
case MAC_ADDRH:
|
799 |
return s->conf.macaddr.a[4] | (s->conf.macaddr.a[5] << 8); |
800 |
case MAC_ADDRL:
|
801 |
return s->conf.macaddr.a[0] | (s->conf.macaddr.a[1] << 8) |
802 |
| (s->conf.macaddr.a[2] << 16) | (s->conf.macaddr.a[3] << 24); |
803 |
case MAC_HASHH:
|
804 |
return s->mac_hashh;
|
805 |
break;
|
806 |
case MAC_HASHL:
|
807 |
return s->mac_hashl;
|
808 |
break;
|
809 |
case MAC_MII_ACC:
|
810 |
return s->mac_mii_acc;
|
811 |
case MAC_MII_DATA:
|
812 |
return s->mac_mii_data;
|
813 |
case MAC_FLOW:
|
814 |
return s->mac_flow;
|
815 |
default:
|
816 |
hw_error("lan9118: Unimplemented MAC register read: %d\n",
|
817 |
s->mac_cmd & 0xf);
|
818 |
} |
819 |
} |
820 |
|
821 |
static void lan9118_eeprom_cmd(lan9118_state *s, int cmd, int addr) |
822 |
{ |
823 |
s->e2p_cmd = (s->e2p_cmd & 0x10) | (cmd << 28) | addr; |
824 |
switch (cmd) {
|
825 |
case 0: |
826 |
s->e2p_data = s->eeprom[addr]; |
827 |
DPRINTF("EEPROM Read %d = 0x%02x\n", addr, s->e2p_data);
|
828 |
break;
|
829 |
case 1: |
830 |
s->eeprom_writable = 0;
|
831 |
DPRINTF("EEPROM Write Disable\n");
|
832 |
break;
|
833 |
case 2: /* EWEN */ |
834 |
s->eeprom_writable = 1;
|
835 |
DPRINTF("EEPROM Write Enable\n");
|
836 |
break;
|
837 |
case 3: /* WRITE */ |
838 |
if (s->eeprom_writable) {
|
839 |
s->eeprom[addr] &= s->e2p_data; |
840 |
DPRINTF("EEPROM Write %d = 0x%02x\n", addr, s->e2p_data);
|
841 |
} else {
|
842 |
DPRINTF("EEPROM Write %d (ignored)\n", addr);
|
843 |
} |
844 |
break;
|
845 |
case 4: /* WRAL */ |
846 |
if (s->eeprom_writable) {
|
847 |
for (addr = 0; addr < 128; addr++) { |
848 |
s->eeprom[addr] &= s->e2p_data; |
849 |
} |
850 |
DPRINTF("EEPROM Write All 0x%02x\n", s->e2p_data);
|
851 |
} else {
|
852 |
DPRINTF("EEPROM Write All (ignored)\n");
|
853 |
} |
854 |
case 5: /* ERASE */ |
855 |
if (s->eeprom_writable) {
|
856 |
s->eeprom[addr] = 0xff;
|
857 |
DPRINTF("EEPROM Erase %d\n", addr);
|
858 |
} else {
|
859 |
DPRINTF("EEPROM Erase %d (ignored)\n", addr);
|
860 |
} |
861 |
break;
|
862 |
case 6: /* ERAL */ |
863 |
if (s->eeprom_writable) {
|
864 |
memset(s->eeprom, 0xff, 128); |
865 |
DPRINTF("EEPROM Erase All\n");
|
866 |
} else {
|
867 |
DPRINTF("EEPROM Erase All (ignored)\n");
|
868 |
} |
869 |
break;
|
870 |
case 7: /* RELOAD */ |
871 |
lan9118_reload_eeprom(s); |
872 |
break;
|
873 |
} |
874 |
} |
875 |
|
876 |
static void lan9118_tick(void *opaque) |
877 |
{ |
878 |
lan9118_state *s = (lan9118_state *)opaque; |
879 |
if (s->int_en & GPT_INT) {
|
880 |
s->int_sts |= GPT_INT; |
881 |
} |
882 |
lan9118_update(s); |
883 |
} |
884 |
|
885 |
static void lan9118_writel(void *opaque, target_phys_addr_t offset, |
886 |
uint32_t val) |
887 |
{ |
888 |
lan9118_state *s = (lan9118_state *)opaque; |
889 |
offset &= 0xff;
|
890 |
|
891 |
//DPRINTF("Write reg 0x%02x = 0x%08x\n", (int)offset, val);
|
892 |
if (offset >= 0x20 && offset < 0x40) { |
893 |
/* TX FIFO */
|
894 |
tx_fifo_push(s, val); |
895 |
return;
|
896 |
} |
897 |
switch (offset) {
|
898 |
case CSR_IRQ_CFG:
|
899 |
/* TODO: Implement interrupt deassertion intervals. */
|
900 |
s->irq_cfg = (s->irq_cfg & IRQ_INT) | (val & IRQ_EN); |
901 |
break;
|
902 |
case CSR_INT_STS:
|
903 |
s->int_sts &= ~val; |
904 |
break;
|
905 |
case CSR_INT_EN:
|
906 |
s->int_en = val & ~RESERVED_INT; |
907 |
s->int_sts |= val & SW_INT; |
908 |
break;
|
909 |
case CSR_FIFO_INT:
|
910 |
DPRINTF("FIFO INT levels %08x\n", val);
|
911 |
s->fifo_int = val; |
912 |
break;
|
913 |
case CSR_RX_CFG:
|
914 |
if (val & 0x8000) { |
915 |
/* RX_DUMP */
|
916 |
s->rx_fifo_used = 0;
|
917 |
s->rx_status_fifo_used = 0;
|
918 |
s->rx_packet_size_tail = s->rx_packet_size_head; |
919 |
s->rx_packet_size[s->rx_packet_size_head] = 0;
|
920 |
} |
921 |
s->rx_cfg = val & 0xcfff1ff0;
|
922 |
break;
|
923 |
case CSR_TX_CFG:
|
924 |
if (val & 0x8000) { |
925 |
s->tx_status_fifo_used = 0;
|
926 |
} |
927 |
if (val & 0x4000) { |
928 |
s->txp->state = TX_IDLE; |
929 |
s->txp->fifo_used = 0;
|
930 |
s->txp->cmd_a = 0xffffffff;
|
931 |
} |
932 |
s->tx_cfg = val & 6;
|
933 |
break;
|
934 |
case CSR_HW_CFG:
|
935 |
if (val & 1) { |
936 |
/* SRST */
|
937 |
lan9118_reset(&s->busdev.qdev); |
938 |
} else {
|
939 |
s->hw_cfg = val & 0x003f300;
|
940 |
} |
941 |
break;
|
942 |
case CSR_RX_DP_CTRL:
|
943 |
if (val & 0x80000000) { |
944 |
/* Skip forward to next packet. */
|
945 |
s->rxp_pad = 0;
|
946 |
s->rxp_offset = 0;
|
947 |
if (s->rxp_size == 0) { |
948 |
/* Pop a word to start the next packet. */
|
949 |
rx_fifo_pop(s); |
950 |
s->rxp_pad = 0;
|
951 |
s->rxp_offset = 0;
|
952 |
} |
953 |
s->rx_fifo_head += s->rxp_size; |
954 |
if (s->rx_fifo_head >= s->rx_fifo_size) {
|
955 |
s->rx_fifo_head -= s->rx_fifo_size; |
956 |
} |
957 |
} |
958 |
break;
|
959 |
case CSR_PMT_CTRL:
|
960 |
if (val & 0x400) { |
961 |
phy_reset(s); |
962 |
} |
963 |
s->pmt_ctrl &= ~0x34e;
|
964 |
s->pmt_ctrl |= (val & 0x34e);
|
965 |
break;
|
966 |
case CSR_GPIO_CFG:
|
967 |
/* Probably just enabling LEDs. */
|
968 |
s->gpio_cfg = val & 0x7777071f;
|
969 |
break;
|
970 |
case CSR_GPT_CFG:
|
971 |
if ((s->gpt_cfg ^ val) & GPT_TIMER_EN) {
|
972 |
if (val & GPT_TIMER_EN) {
|
973 |
ptimer_set_count(s->timer, val & 0xffff);
|
974 |
ptimer_run(s->timer, 0);
|
975 |
} else {
|
976 |
ptimer_stop(s->timer); |
977 |
ptimer_set_count(s->timer, 0xffff);
|
978 |
} |
979 |
} |
980 |
s->gpt_cfg = val & (GPT_TIMER_EN | 0xffff);
|
981 |
break;
|
982 |
case CSR_WORD_SWAP:
|
983 |
/* Ignored because we're in 32-bit mode. */
|
984 |
s->word_swap = val; |
985 |
break;
|
986 |
case CSR_MAC_CSR_CMD:
|
987 |
s->mac_cmd = val & 0x4000000f;
|
988 |
if (val & 0x80000000) { |
989 |
if (val & 0x40000000) { |
990 |
s->mac_data = do_mac_read(s, val & 0xf);
|
991 |
DPRINTF("MAC read %d = 0x%08x\n", val & 0xf, s->mac_data); |
992 |
} else {
|
993 |
DPRINTF("MAC write %d = 0x%08x\n", val & 0xf, s->mac_data); |
994 |
do_mac_write(s, val & 0xf, s->mac_data);
|
995 |
} |
996 |
} |
997 |
break;
|
998 |
case CSR_MAC_CSR_DATA:
|
999 |
s->mac_data = val; |
1000 |
break;
|
1001 |
case CSR_AFC_CFG:
|
1002 |
s->afc_cfg = val & 0x00ffffff;
|
1003 |
break;
|
1004 |
case CSR_E2P_CMD:
|
1005 |
lan9118_eeprom_cmd(s, (val >> 28) & 7, val & 0xff); |
1006 |
break;
|
1007 |
case CSR_E2P_DATA:
|
1008 |
s->e2p_data = val & 0xff;
|
1009 |
break;
|
1010 |
|
1011 |
default:
|
1012 |
hw_error("lan9118_write: Bad reg 0x%x = %x\n", (int)offset, val); |
1013 |
break;
|
1014 |
} |
1015 |
lan9118_update(s); |
1016 |
} |
1017 |
|
1018 |
static uint32_t lan9118_readl(void *opaque, target_phys_addr_t offset) |
1019 |
{ |
1020 |
lan9118_state *s = (lan9118_state *)opaque; |
1021 |
|
1022 |
//DPRINTF("Read reg 0x%02x\n", (int)offset);
|
1023 |
if (offset < 0x20) { |
1024 |
/* RX FIFO */
|
1025 |
return rx_fifo_pop(s);
|
1026 |
} |
1027 |
switch (offset) {
|
1028 |
case 0x40: |
1029 |
return rx_status_fifo_pop(s);
|
1030 |
case 0x44: |
1031 |
return s->rx_status_fifo[s->tx_status_fifo_head];
|
1032 |
case 0x48: |
1033 |
return tx_status_fifo_pop(s);
|
1034 |
case 0x4c: |
1035 |
return s->tx_status_fifo[s->tx_status_fifo_head];
|
1036 |
case CSR_ID_REV:
|
1037 |
return 0x01180001; |
1038 |
case CSR_IRQ_CFG:
|
1039 |
return s->irq_cfg;
|
1040 |
case CSR_INT_STS:
|
1041 |
return s->int_sts;
|
1042 |
case CSR_INT_EN:
|
1043 |
return s->int_en;
|
1044 |
case CSR_BYTE_TEST:
|
1045 |
return 0x87654321; |
1046 |
case CSR_FIFO_INT:
|
1047 |
return s->fifo_int;
|
1048 |
case CSR_RX_CFG:
|
1049 |
return s->rx_cfg;
|
1050 |
case CSR_TX_CFG:
|
1051 |
return s->tx_cfg;
|
1052 |
case CSR_HW_CFG:
|
1053 |
return s->hw_cfg | 0x4; |
1054 |
case CSR_RX_DP_CTRL:
|
1055 |
return 0; |
1056 |
case CSR_RX_FIFO_INF:
|
1057 |
return (s->rx_status_fifo_used << 16) | (s->rx_fifo_used << 2); |
1058 |
case CSR_TX_FIFO_INF:
|
1059 |
return (s->tx_status_fifo_used << 16) |
1060 |
| (s->tx_fifo_size - s->txp->fifo_used); |
1061 |
case CSR_PMT_CTRL:
|
1062 |
return s->pmt_ctrl;
|
1063 |
case CSR_GPIO_CFG:
|
1064 |
return s->gpio_cfg;
|
1065 |
case CSR_GPT_CFG:
|
1066 |
return s->gpt_cfg;
|
1067 |
case CSR_GPT_CNT:
|
1068 |
return ptimer_get_count(s->timer);
|
1069 |
case CSR_WORD_SWAP:
|
1070 |
return s->word_swap;
|
1071 |
case CSR_FREE_RUN:
|
1072 |
return (qemu_get_clock(vm_clock) / 40) - s->free_timer_start; |
1073 |
case CSR_RX_DROP:
|
1074 |
/* TODO: Implement dropped frames counter. */
|
1075 |
return 0; |
1076 |
case CSR_MAC_CSR_CMD:
|
1077 |
return s->mac_cmd;
|
1078 |
case CSR_MAC_CSR_DATA:
|
1079 |
return s->mac_data;
|
1080 |
case CSR_AFC_CFG:
|
1081 |
return s->afc_cfg;
|
1082 |
case CSR_E2P_CMD:
|
1083 |
return s->e2p_cmd;
|
1084 |
case CSR_E2P_DATA:
|
1085 |
return s->e2p_data;
|
1086 |
} |
1087 |
hw_error("lan9118_read: Bad reg 0x%x\n", (int)offset); |
1088 |
return 0; |
1089 |
} |
1090 |
|
1091 |
static CPUReadMemoryFunc * const lan9118_readfn[] = { |
1092 |
lan9118_readl, |
1093 |
lan9118_readl, |
1094 |
lan9118_readl |
1095 |
}; |
1096 |
|
1097 |
static CPUWriteMemoryFunc * const lan9118_writefn[] = { |
1098 |
lan9118_writel, |
1099 |
lan9118_writel, |
1100 |
lan9118_writel |
1101 |
}; |
1102 |
|
1103 |
static void lan9118_cleanup(VLANClientState *nc) |
1104 |
{ |
1105 |
lan9118_state *s = DO_UPCAST(NICState, nc, nc)->opaque; |
1106 |
|
1107 |
s->nic = NULL;
|
1108 |
} |
1109 |
|
1110 |
static NetClientInfo net_lan9118_info = {
|
1111 |
.type = NET_CLIENT_TYPE_NIC, |
1112 |
.size = sizeof(NICState),
|
1113 |
.can_receive = lan9118_can_receive, |
1114 |
.receive = lan9118_receive, |
1115 |
.cleanup = lan9118_cleanup, |
1116 |
.link_status_changed = lan9118_set_link, |
1117 |
}; |
1118 |
|
1119 |
static int lan9118_init1(SysBusDevice *dev) |
1120 |
{ |
1121 |
lan9118_state *s = FROM_SYSBUS(lan9118_state, dev); |
1122 |
QEMUBH *bh; |
1123 |
int i;
|
1124 |
|
1125 |
s->mmio_index = cpu_register_io_memory(lan9118_readfn, |
1126 |
lan9118_writefn, s); |
1127 |
sysbus_init_mmio(dev, 0x100, s->mmio_index);
|
1128 |
sysbus_init_irq(dev, &s->irq); |
1129 |
qemu_macaddr_default_if_unset(&s->conf.macaddr); |
1130 |
|
1131 |
s->nic = qemu_new_nic(&net_lan9118_info, &s->conf, |
1132 |
dev->qdev.info->name, dev->qdev.id, s); |
1133 |
qemu_format_nic_info_str(&s->nic->nc, s->conf.macaddr.a); |
1134 |
s->eeprom[0] = 0xa5; |
1135 |
for (i = 0; i < 6; i++) { |
1136 |
s->eeprom[i + 1] = s->conf.macaddr.a[i];
|
1137 |
} |
1138 |
s->pmt_ctrl = 1;
|
1139 |
s->txp = &s->tx_packet; |
1140 |
|
1141 |
bh = qemu_bh_new(lan9118_tick, s); |
1142 |
s->timer = ptimer_init(bh); |
1143 |
ptimer_set_freq(s->timer, 10000);
|
1144 |
ptimer_set_limit(s->timer, 0xffff, 1); |
1145 |
|
1146 |
/* ??? Save/restore. */
|
1147 |
return 0; |
1148 |
} |
1149 |
|
1150 |
static SysBusDeviceInfo lan9118_info = {
|
1151 |
.init = lan9118_init1, |
1152 |
.qdev.name = "lan9118",
|
1153 |
.qdev.size = sizeof(lan9118_state),
|
1154 |
.qdev.reset = lan9118_reset, |
1155 |
.qdev.props = (Property[]) { |
1156 |
DEFINE_NIC_PROPERTIES(lan9118_state, conf), |
1157 |
DEFINE_PROP_END_OF_LIST(), |
1158 |
} |
1159 |
}; |
1160 |
|
1161 |
static void lan9118_register_devices(void) |
1162 |
{ |
1163 |
sysbus_register_withprop(&lan9118_info); |
1164 |
} |
1165 |
|
1166 |
/* Legacy helper function. Should go away when machine config files are
|
1167 |
implemented. */
|
1168 |
void lan9118_init(NICInfo *nd, uint32_t base, qemu_irq irq)
|
1169 |
{ |
1170 |
DeviceState *dev; |
1171 |
SysBusDevice *s; |
1172 |
|
1173 |
qemu_check_nic_model(nd, "lan9118");
|
1174 |
dev = qdev_create(NULL, "lan9118"); |
1175 |
qdev_set_nic_properties(dev, nd); |
1176 |
qdev_init_nofail(dev); |
1177 |
s = sysbus_from_qdev(dev); |
1178 |
sysbus_mmio_map(s, 0, base);
|
1179 |
sysbus_connect_irq(s, 0, irq);
|
1180 |
} |
1181 |
|
1182 |
device_init(lan9118_register_devices) |