/**************************************************************************** * drivers/net/dm90x0.c * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. The * ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the * License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations * under the License. * ****************************************************************************/ /* References: Davicom data sheets (DM9000-DS-F03-041906.pdf, * DM9010-DS-F01-103006.pdf) and looking at lots of other DM90x0 * drivers. */ /**************************************************************************** * Included Files ****************************************************************************/ #include #if defined(CONFIG_NET) && defined(CONFIG_NET_DM90x0) /* Only one hardware interface supported at present (although there are * hooks throughout the design to that extending the support to multiple * interfaces should not be that difficult) */ #undef CONFIG_DM9X_NINTERFACES #define CONFIG_DM9X_NINTERFACES 1 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef CONFIG_NET_PKT # include #endif /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* If processing is not done at the interrupt level, then work queue support * is required. */ #if !defined(CONFIG_SCHED_WORKQUEUE) # error Work queue support is required in this configuration (CONFIG_SCHED_WORKQUEUE) #endif /* The low priority work queue is preferred. If it is not enabled, LPWORK * will be the same as HPWORK. * * NOTE: However, the network should NEVER run on the high priority work * queue! That queue is intended only to service short back end interrupt * processing that never suspends. Suspending the high priority work queue * may bring the system to its knees! */ #define ETHWORK LPWORK /* DM90000 and DM9010 register offsets */ #define DM9X_NETC 0x00 /* Network control register */ #define DM9X_NETS 0x01 /* Network Status register */ #define DM9X_TXC 0x02 /* TX control register */ #define DM9X_TXS1 0x03 /* TX status register 1 */ #define DM9X_TXS2 0x03 /* TX status register 2 */ #define DM9X_RXC 0x05 /* RX control register */ #define DM9X_RXS 0x06 /* RX status register */ #define DM9X_RXOVF 0x07 /* Receive overflow counter register */ #define DM9X_BPTHRES 0x08 /* Back pressure threshold register */ #define DM9X_FCTHRES 0x09 /* Flow control threshold register */ #define DM9X_FC 0x0a /* RX/TX flow control register */ #define DM9X_EEPHYC 0x0b /* EEPROM & PHY control register */ #define DM9X_EEPHYA 0x0c /* EEPROM & PHY address register */ #define DM9X_EEPHYDL 0x0d /* EEPROM & PHY data register (lo) */ #define DM9X_EEPHYDH 0x0e /* EEPROM & PHY data register (hi) */ #define DM9X_WAKEUP 0x0f /* Wake-up control register */ #define DM9X_PAB0 0x10 /* Physical address register (byte 0) */ #define DM9X_PAB1 0x11 /* Physical address register (byte 1) */ #define DM9X_PAB2 0x12 /* Physical address register (byte 2) */ #define DM9X_PAB3 0x13 /* Physical address register (byte 3) */ #define DM9X_PAB4 0x14 /* Physical address register (byte 4) */ #define DM9X_PAB5 0x15 /* Physical address register (byte 5) */ #define DM9X_MAB0 0x16 /* Multicast address register (byte 0) */ #define DM9X_MAB1 0x17 /* Multicast address register (byte 1) */ #define DM9X_MAB2 0x18 /* Multicast address register (byte 2) */ #define DM9X_MAB3 0x19 /* Multicast address register (byte 3) */ #define DM9X_MAB4 0x1a /* Multicast address register (byte 4) */ #define DM9X_MAB5 0x1b /* Multicast address register (byte 5) */ #define DM9X_MAB6 0x1c /* Multicast address register (byte 6) */ #define DM9X_MAB7 0x1d /* Multicast address register (byte 7) */ #define DM9X_GPC 0x1e /* General purpose control register */ #define DM9X_GPD 0x1f /* General purpose register */ #define DM9X_TRPAL 0x22 /* TX read pointer address (lo) */ #define DM9X_TRPAH 0x23 /* TX read pointer address (hi) */ #define DM9X_RWPAL 0x24 /* RX write pointer address (lo) */ #define DM9X_RWPAH 0x25 /* RX write pointer address (hi) */ #define DM9X_VIDL 0x28 /* Vendor ID (lo) */ #define DM9X_VIDH 0x29 /* Vendor ID (hi) */ #define DM9X_PIDL 0x2a /* Product ID (lo) */ #define DM9X_PIDH 0x2b /* Product ID (hi) */ #define DM9X_CHIPR 0x2c /* Product ID (lo) */ #define DM9X_TXC2 0x2d /* Transmit control register 2 (dm9010) */ #define DM9X_OTC 0x2e /* Operation test control register (dm9010) */ #define DM9X_SMODEC 0x2f /* Special mode control register */ #define DM9X_ETXCSR 0x30 /* Early transmit control/status register (dm9010) */ #define DM9X_TCCR 0x31 /* Transmit checksum control register (dm9010) */ #define DM9X_RCSR 0x32 /* Receive checksum control/status register (dm9010) */ #define DM9X_EPHYA 0x33 /* External PHY address register (dm9010) */ #define DM9X_GPC2 0x34 /* General purpose control register 2 (dm9010) */ #define DM9X_GPD2 0x35 /* General purpose register 2 */ #define DM9X_GPC3 0x36 /* General purpose control register 3 (dm9010) */ #define DM9X_GPD3 0x37 /* General purpose register 3 */ #define DM9X_PBUSC 0x38 /* Processor bus control register (dm9010) */ #define DM9X_IPINC 0x39 /* INT pin control register (dm9010) */ #define DM9X_MON1 0x40 /* Monitor register 1 (dm9010) */ #define DM9X_MON2 0x41 /* Monitor register 2 (dm9010) */ #define DM9X_SCLKC 0x50 /* System clock turn ON control register (dm9010) */ #define DM9X_SCLKR 0x51 /* Resume system clock control register (dm9010) */ #define DM9X_MRCMDX 0xf0 /* Memory data pre-fetch read command without address increment */ #define DM9X_MRCMDX1 0xf1 /* memory data read command without address increment (dm9010) */ #define DM9X_MRCMD 0xf2 /* Memory data read command with address increment */ #define DM9X_MDRAL 0xf4 /* Memory data read address register (lo) */ #define DM9X_MDRAH 0xf5 /* Memory data read address register (hi) */ #define DM9X_MWCMDX 0xf6 /* Memory data write command without address increment */ #define DM9X_MWCMD 0xf8 /* Memory data write command with address increment */ #define DM9X_MDWAL 0xfa /* Memory data write address register (lo) */ #define DM9X_MDWAH 0xfb /* Memory data write address register (lo) */ #define DM9X_TXPLL 0xfc /* Memory data write address register (lo) */ #define DM9X_TXPLH 0xfd /* Memory data write address register (hi) */ #define DM9X_ISR 0xfe /* Interrupt status register */ #define DM9X_IMR 0xff /* Interrupt mask register */ /* Network control register bit definitions */ #define DM9X_NETC_RST (1 << 0) /* Software reset */ #define DM9X_NETC_LBKM (3 << 1) /* Loopback mode mask */ #define DM9X_NETC_LBK0 (0 << 1) /* 0: Normal */ #define DM9X_NETC_LBK1 (1 << 1) /* 1: MAC internal loopback */ #define DM9X_NETC_LBK2 (2 << 1) /* 2: Internal PHY 100M mode loopback */ #define DM9X_NETC_FDX (1 << 3) /* Full dupliex mode */ #define DM9X_NETC_FCOL (1 << 4) /* Force collision mode */ #define DM9X_NETC_WAKEEN (1 << 6) /* Wakeup event enable */ #define DM9X_NETC_EXTPHY (1 << 7) /* Select external PHY */ /* Network status bit definitions */ #define DM9X_NETS_RXOV (1 << 1) /* RX Fifo overflow */ #define DM9X_NETS_TX1END (1 << 2) /* TX packet 1 complete status */ #define DM9X_NETS_TX2END (1 << 3) /* TX packet 2 complete status */ #define DM9X_NETS_WAKEST (1 << 5) /* Wakeup event status */ #define DM9X_NETS_LINKST (1 << 6) /* Link status */ #define DM9X_NETS_SPEED (1 << 7) /* Media speed */ /* IMR/ISR bit definitions */ #define DM9X_INT_PR (1 << 0) /* Packet received interrupt */ #define DM9X_INT_PT (1 << 1) /* Packet transmitted interrupt */ #define DM9X_INT_RO (1 << 2) /* Receive overflow interrupt */ #define DM9X_INT_ROO (1 << 3) /* Receive overflow counter overflow int */ #define DM9X_INT_UDRUN (1 << 4) /* Transmit underrun interrupt */ #define DM9X_INT_LNKCHG (1 << 5) /* Link status change interrupt */ #define DM9X_INT_ALL (0x3f) #define DM9X_IMR_UNUSED (1 << 6) /* (not used) */ #define DM9X_IMR_PAR (1 << 7) /* Enable auto R/W pointer reset */ #define DM9X_ISR_IOMODEM (3 << 6) /* IO mode mask */ #define DM9X_ISR_IOMODE8 (2 << 6) /* IO mode = 8 bit */ #define DM9X_ISR_IOMODE16 (0 << 6) /* IO mode = 16 bit */ #define DM9X_ISR_IOMODE32 (1 << 6) /* IO mode = 32 bit */ #define DM9X_IMRENABLE (DM9X_INT_PR | DM9X_INT_PT | DM9X_INT_LNKCHG | DM9X_IMR_PAR) #define DM9X_IMRRXDISABLE (DM9X_INT_PT | DM9X_INT_LNKCHG | DM9X_IMR_PAR) #define DM9X_IMRDISABLE (DM9X_IMR_PAR) /* EEPROM/PHY control register bits */ #define DM9X_EEPHYC_ERRE (1 << 0) /* EEPROM (vs PHY) access status */ #define DM9X_EEPHYC_ERPRW (1 << 1) /* EEPROM/PHY write access */ #define DM9X_EEPHYC_ERPRR (1 << 2) /* EEPROM/PHY read access */ #define DM9X_EEPHYC_EPOS (1 << 3) /* EEPROM/PHY operation select */ #define DM9X_EEPHYC_WEP (1 << 4) /* Write EEPROM enable */ #define DM9X_EEPHYC_REEP (1 << 5) /* Reload EEPROM */ /* Supported values from the vendor and product ID register */ #define DM9X_DAVICOMVID 0x0a46 #define DM9X_DM9000PID 0x9000 #define DM9X_DM9010PID 0x9010 /* RX control register bit settings */ #define DM9X_RXC_RXEN (1 << 0) /* RX enable */ #define DM9X_RXC_PRMSC (1 << 1) /* Promiscuous mode */ #define DM9X_RXC_RUNT (1 << 2) /* Pass runt packet */ #define DM9X_RXC_ALL (1 << 3) /* Pass all multicast */ #define DM9X_RXC_DISCRC (1 << 4) /* Discard CRC error packets */ #define DM9X_RXC_DISLONG (1 << 5) /* Discard long packets */ #define DM9X_RXC_WTDIS (1 << 6) /* Disable watchdog timer */ #define DM9X_RXC_HASHALL (1 << 7) /* Filter all addresses in hash table */ #define DM9X_RXCSETUP (DM9X_RXC_DISCRC | DM9X_RXC_DISLONG) /* EEPHY bit settings */ #define DM9X_EEPHYA_EROA 0x40 /* PHY register address 0x01 */ #define DM9X_PKTRDY 0x01 /* Packet ready to receive */ /* The RX interrupt will be disabled if more than the following RX * interrupts are received back-to-back. */ #define DM9X_CRXTHRES 10 /* All access is via an index register and a data register. Select accecss * according to user supplied base address and bus width. */ #if defined(CONFIG_DM9X_BUSWIDTH8) # define DM9X_INDEX *(volatile uint8_t*)(CONFIG_DM9X_BASE) # define DM9X_DATA *(volatile uint8_t*)(CONFIG_DM9X_BASE + 2) #elif defined(CONFIG_DM9X_BUSWIDTH16) # define DM9X_INDEX *(volatile uint16_t*)(CONFIG_DM9X_BASE) # define DM9X_DATA *(volatile uint16_t*)(CONFIG_DM9X_BASE + 2) #elif defined(CONFIG_DM9X_BUSWIDTH32) # define DM9X_INDEX *(volatile uint32_t*)(CONFIG_DM9X_BASE) # define DM9X_DATA *(volatile uint32_t*)(CONFIG_DM9X_BASE + 2) #endif /* Phy operating mode. Default is AUTO, but this setting can be overridden * in the NuttX configuration file. */ #if !defined(CONFIG_DM9X_MODE_AUTO) && !defined(CONFIG_DM9X_MODE_10MHD) && \ !defined(CONFIG_DM9X_MODE_100MHD) && !defined(CONFIG_DM9X_MODE_10MFD) && \ !defined(CONFIG_DM9X_MODE_100MFD) # define CONFIG_DM9X_MODE_AUTO 1 #endif /* TX poll deley = 1 seconds. * CLK_TCK is the number of clock ticks per second */ #define DM9X_WDDELAY (1*CLK_TCK) /* TX timeout = 1 minute */ #define DM6X_TXTIMEOUT (60*CLK_TCK) /* This is a helper pointer for accessing the contents of Ethernet header */ #define BUF ((struct eth_hdr_s *)priv->dm_dev.d_buf) /**************************************************************************** * Private Types ****************************************************************************/ union rx_desc_u { uint8_t rx_buf[4]; struct { uint8_t rx_byte; uint8_t rx_status; uint16_t rx_len; } desc; }; /* The dm9x_driver_s encapsulates all DM90x0 state information for a single * DM90x0 hardware interface */ struct dm9x_driver_s { bool dm_bifup; /* true:ifup false:ifdown */ bool dm_b100m; /* true:speed == 100M; false:speed == 10M */ uint8_t dm_ntxpending; /* Count of packets pending transmission */ uint8_t ncrxpackets; /* Number of continuous rx packets */ struct wdog_s dm_txpoll; /* TX poll timer */ struct wdog_s dm_txtimeout; /* TX timeout timer */ struct work_s dm_irqwork; /* For deferring interrupt work to the work queue */ struct work_s dm_pollwork; /* For deferring poll work to the work queue */ /* Mode-dependent function to move data in 8/16/32 I/O modes */ void (*dm_read)(uint8_t *ptr, int len); void (*dm_write)(const uint8_t *ptr, int len); void (*dm_discard)(int len); /* This holds the information visible to the NuttX network */ struct net_driver_s dm_dev; }; /**************************************************************************** * Private Data ****************************************************************************/ /* A single packet buffer is used */ static uint8_t g_pktbuf[MAX_NETDEV_PKTSIZE + CONFIG_NET_GUARDSIZE]; /* At present, only a single DM90x0 device is supported. */ static struct dm9x_driver_s g_dm9x[CONFIG_DM9X_NINTERFACES]; /**************************************************************************** * Private Function Prototypes ****************************************************************************/ /* Utility functions */ static uint8_t getreg(int reg); static void putreg(int reg, uint8_t value); static void read8(uint8_t *ptr, int len); static void read16(uint8_t *ptr, int len); static void read32(uint8_t *ptr, int len); static void discard8(int len); static void discard16(int len); static void discard32(int len); static void write8(const uint8_t *ptr, int len); static void write16(const uint8_t *ptr, int len); static void write32(const uint8_t *ptr, int len); #if 0 /* Not used */ static uint16_t dm9x_readsrom(FAR struct dm9x_driver_s *priv, int offset); #endif static uint16_t dm9x_phyread(FAR struct dm9x_driver_s *priv, int reg); static void dm9x_phywrite(FAR struct dm9x_driver_s *priv, int reg, uint16_t value); #if defined(CONFIG_DM9X_CHECKSUM) static bool dm9x_rxchecksumready(uint8_t); #else # define dm9x_rxchecksumready(a) ((a) == 0x01) #endif /* Common TX logic */ static int dm9x_transmit(FAR struct dm9x_driver_s *priv); static int dm9x_txpoll(FAR struct net_driver_s *dev); /* Interrupt handling */ static void dm9x_receive(FAR struct dm9x_driver_s *priv); static void dm9x_txdone(FAR struct dm9x_driver_s *priv); static void dm9x_interrupt_work(FAR void *arg); static int dm9x_interrupt(int irq, FAR void *context, FAR void *arg); /* Watchdog timer expirations */ static void dm9x_txtimeout_work(FAR void *arg); static void dm9x_txtimeout_expiry(wdparm_t arg); static void dm9x_poll_work(FAR void *arg); static void dm9x_poll_expiry(wdparm_t arg); /* NuttX callback functions */ static int dm9x_ifup(FAR struct net_driver_s *dev); static int dm9x_ifdown(FAR struct net_driver_s *dev); static void dm9x_txavail_work(FAR void *arg); static int dm9x_txavail(FAR struct net_driver_s *dev); #ifdef CONFIG_NET_MCASTGROUP static int dm9x_addmac(FAR struct net_driver_s *dev, FAR const uint8_t *mac); static int dm9x_rmmac(FAR struct net_driver_s *dev, FAR const uint8_t *mac); #endif /* Initialization functions */ static void dm9x_bringup(FAR struct dm9x_driver_s *priv); static void dm9x_reset(FAR struct dm9x_driver_s *priv); /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Name: getreg and setreg * * Description: * Access to memory-mapped DM90x0 8-bit registers * * Input Parameters: * reg - Register number * value - Value to write to the register (setreg only) * * Returned Value: * Value read from the register (getreg only) * * Assumptions: * ****************************************************************************/ static uint8_t getreg(int reg) { DM9X_INDEX = reg; return DM9X_DATA & 0xff; } static void putreg(int reg, uint8_t value) { DM9X_INDEX = reg; DM9X_DATA = value & 0xff; } /**************************************************************************** * Name: read8, read16, read32 * * Description: * Read packet data from the DM90x0 SRAM based on its current I/O mode * * Input Parameters: * ptr - Location to write the packet data * len - The number of bytes to read * * Returned Value: * None * * Assumptions: * ****************************************************************************/ static void read8(FAR uint8_t *ptr, int len) { ninfo("Read %d bytes (8-bit mode)\n", len); for (; len > 0; len--) { *ptr++ = DM9X_DATA; } } static void read16(FAR uint8_t *ptr, int len) { FAR uint16_t *ptr16 = (FAR uint16_t *)ptr; ninfo("Read %d bytes (16-bit mode)\n", len); for (; len > 0; len -= sizeof(uint16_t)) { *ptr16++ = DM9X_DATA; } } static void read32(FAR uint8_t *ptr, int len) { FAR uint32_t *ptr32 = (FAR uint32_t *)ptr; ninfo("Read %d bytes (32-bit mode)\n", len); for (; len > 0; len -= sizeof(uint32_t)) { *ptr32++ = DM9X_DATA; } } /**************************************************************************** * Name: discard8, discard16, discard32 * * Description: * Read and discard packet data in the DM90x0 SRAM based on its current * I/O mode * * Input Parameters: * len - The number of bytes to discard * * Returned Value: * None * * Assumptions: * ****************************************************************************/ static void discard8(int len) { ninfo("Discard %d bytes (8-bit mode)\n", len); for (; len > 0; len--) { DM9X_DATA; } } static void discard16(int len) { ninfo("Discard %d bytes (16-bit mode)\n", len); for (; len > 0; len -= sizeof(uint16_t)) { DM9X_DATA; } } static void discard32(int len) { ninfo("Discard %d bytes (32-bit mode)\n", len); for (; len > 0; len -= sizeof(uint32_t)) { DM9X_DATA; } } /**************************************************************************** * Name: write8, write16, write32 * * Description: * Write packet data into the DM90x0 SRAM based on its current I/O mode * * Input Parameters: * ptr - Location to write the packet data * len - The number of bytes to read * * Returned Value: * None * * Assumptions: * ****************************************************************************/ static void write8(FAR const uint8_t *ptr, int len) { ninfo("Write %d bytes (8-bit mode)\n", len); for (; len > 0; len--) { DM9X_DATA = (*ptr++ & 0xff); } } static void write16(const uint8_t *ptr, int len) { FAR uint16_t *ptr16 = (FAR uint16_t *)ptr; ninfo("Write %d bytes (16-bit mode)\n", len); for (; len > 0; len -= sizeof(uint16_t)) { DM9X_DATA = *ptr16++; } } static void write32(FAR const uint8_t *ptr, int len) { FAR uint32_t *ptr32 = (FAR uint32_t *)ptr; ninfo("Write %d bytes (32-bit mode)\n", len); for (; len > 0; len -= sizeof(uint32_t)) { DM9X_DATA = *ptr32++; } } /**************************************************************************** * Name: dm9x_readsrom * * Description: * Read a word from SROM * * Input Parameters: * priv - Reference to the driver state structure * offset - SROM offset to read from * * Returned Value: * SROM content at that offset * * Assumptions: * ****************************************************************************/ #if 0 /* Not used */ static uint16_t dm9x_readsrom(FAR struct dm9x_driver_s *priv, int offset) { putreg(DM9X_EEPHYA, offset); putreg(DM9X_EEPHYC, DM9X_EEPHYC_ERPRR); up_udelay(200); putreg(DM9X_EEPHYC, 0x00); return (getreg(DM9X_EEPHYDL) + (getreg(DM9X_EEPHYDH) << 8)); } #endif /**************************************************************************** * Name: dm9x_phyread and dm9x_phywrite * * Description: * Read/write data from/to the PHY * * Input Parameters: * priv - Reference to the driver state structure * reg - PHY register offset * value - The value to write to the PHY register (dm9x_write only) * * Returned Value: * The value read from the PHY (dm9x_read only) * * Assumptions: * ****************************************************************************/ static uint16_t dm9x_phyread(FAR struct dm9x_driver_s *priv, int reg) { /* Setup DM9X_EEPHYA, the EEPROM/PHY address register */ putreg(DM9X_EEPHYA, DM9X_EEPHYA_EROA | reg); /* Issue PHY read command pulse in the EEPROM/PHY control register */ putreg(DM9X_EEPHYC, (DM9X_EEPHYC_ERPRR | DM9X_EEPHYC_EPOS)); up_udelay(100); putreg(DM9X_EEPHYC, 0x00); /* Return the data from the EEPROM/PHY data register pair */ return (((uint16_t)getreg(DM9X_EEPHYDH)) << 8) | (uint16_t)getreg(DM9X_EEPHYDL); } static void dm9x_phywrite(FAR struct dm9x_driver_s *priv, int reg, uint16_t value) { /* Setup DM9X_EEPHYA, the EEPROM/PHY address register */ putreg(DM9X_EEPHYA, DM9X_EEPHYA_EROA | reg); /* Put the data to write in the EEPROM/PHY data register pair */ putreg(DM9X_EEPHYDL, (value & 0xff)); putreg(DM9X_EEPHYDH, ((value >> 8) & 0xff)); /* Issue PHY write command pulse in the EEPROM/PHY control register */ putreg(DM9X_EEPHYC, (DM9X_EEPHYC_ERPRW | DM9X_EEPHYC_EPOS)); up_udelay(500); putreg(DM9X_EEPHYC, 0x0); } /**************************************************************************** * Name: dm9x_rxchecksumready * * Description: * Return true if the RX checksum is available * * Input Parameters: * rxbyte * * Returned Value: * true: checksum is ready * * Assumptions: * ****************************************************************************/ #if defined(CONFIG_DM9X_CHECKSUM) static inline bool dm9x_rxchecksumready(uint8_t rxbyte) { if ((rxbyte & 0x01) == 0) { return false; } return ((rxbyte >> 4) | 0x01) != 0; } #endif /**************************************************************************** * Name: dm9x_transmit * * Description: * Start hardware transmission. Called either from the txdone interrupt * handling or from watchdog based polling. * * Input Parameters: * priv - Reference to the driver state structure * * Returned Value: * OK on success; a negated errno on failure * * Assumptions: * ****************************************************************************/ static int dm9x_transmit(FAR struct dm9x_driver_s *priv) { /* Check if there is room in the DM90x0 to hold another packet. In 100M * mode, that can be 2 packets, otherwise it is a single packet. */ if (priv->dm_ntxpending < 1 || (priv->dm_b100m && priv->dm_ntxpending < 2)) { /* Increment count of packets transmitted */ priv->dm_ntxpending++; NETDEV_TXPACKETS(&dm9x0->dm_dev); /* Disable all DM90x0 interrupts */ putreg(DM9X_IMR, DM9X_IMRDISABLE); /* Set the TX length */ putreg(DM9X_TXPLL, (priv->dm_dev.d_len & 0xff)); putreg(DM9X_TXPLH, (priv->dm_dev.d_len >> 8) & 0xff); /* Move the data to be sent into TX SRAM */ DM9X_INDEX = DM9X_MWCMD; priv->dm_write(priv->dm_dev.d_buf, priv->dm_dev.d_len); #if !defined(CONFIG_DM9X_ETRANS) /* Issue TX polling command */ putreg(DM9X_TXC, 0x1); /* Cleared after TX complete */ #endif /* Clear count of back-to-back RX packet transfers */ priv->ncrxpackets = 0; /* Re-enable DM90x0 interrupts */ putreg(DM9X_IMR, DM9X_IMRENABLE); /* Setup the TX timeout watchdog (perhaps restarting the timer) */ wd_start(&priv->dm_txtimeout, DM6X_TXTIMEOUT, dm9x_txtimeout_expiry, (wdparm_t)priv); return OK; } return -EBUSY; } /**************************************************************************** * Name: dm9x_txpoll * * Description: * The transmitter is available, check if the network has any outgoing * packets ready to send. This is a callback from devif_poll(). * devif_poll() may be called: * * 1. When the preceding TX packet send is complete, * 2. When the preceding TX packet send timesout and the DM90x0 is reset * 3. During normal TX polling * * Input Parameters: * dev - Reference to the NuttX driver state structure * * Returned Value: * OK on success; a negated errno on failure * * Assumptions: * ****************************************************************************/ static int dm9x_txpoll(FAR struct net_driver_s *dev) { FAR struct dm9x_driver_s *priv = (FAR struct dm9x_driver_s *)dev->d_private; /* If the polling resulted in data that should be sent out on the network, * the field d_len is set to a value > 0. */ if (priv->dm_dev.d_len > 0) { /* Look up the destination MAC address and add it to the Ethernet * header. */ #ifdef CONFIG_NET_IPv4 #ifdef CONFIG_NET_IPv6 if (IFF_IS_IPv4(priv->dm_dev.d_flags)) #endif { arp_out(&priv->dm_dev); } #endif /* CONFIG_NET_IPv4 */ #ifdef CONFIG_NET_IPv6 #ifdef CONFIG_NET_IPv4 else #endif { neighbor_out(&priv->dm_dev); } #endif /* CONFIG_NET_IPv6 */ if (!devif_loopback(&priv->dm_dev)) { /* Send the packet */ dm9x_transmit(priv); /* Check if there is room in the DM90x0 to hold another packet. * In 100M mode, that can be 2 packets, otherwise it is a single * packet. */ if (priv->dm_ntxpending > 1 || !priv->dm_b100m) { /* Returning a non-zero value terminate the poll operation */ return 1; } } } /* If zero is returned, the polling will continue until all connections * have been examined. */ return 0; } /**************************************************************************** * Name: dm9x_receive * * Description: * An interrupt was received indicating the availability of a new RX packet * * Input Parameters: * priv - Reference to the driver state structure * * Returned Value: * None * * Assumptions: * ****************************************************************************/ static void dm9x_receive(FAR struct dm9x_driver_s *priv) { union rx_desc_u rx; bool bchecksumready; uint8_t rxbyte; ninfo("Packet received\n"); do { /* Store the value of memory data read address register */ getreg(DM9X_MDRAH); getreg(DM9X_MDRAL); getreg(DM9X_MRCMDX); /* Dummy read */ rxbyte = (uint8_t)DM9X_DATA; /* Get the most up-to-date data */ /* Packet ready for receive check */ bchecksumready = dm9x_rxchecksumready(rxbyte); if (!bchecksumready) { break; } /* A packet is ready now. Get status/length */ DM9X_INDEX = DM9X_MRCMD; /* set read ptr ++ */ /* Read packet status & length */ priv->dm_read((FAR uint8_t *)&rx, 4); /* Check if any errors were reported by the hardware */ if (rx.desc.rx_status & 0xbf) { /* Bad RX packet... update statistics */ nerr("ERROR: Received packet with errors: %02x\n", rx.desc.rx_status); NETDEV_RXERRORS(&priv->dm_dev); /* Drop this packet and continue to check the next packet */ priv->dm_discard(rx.desc.rx_len); } /* Also check if the packet is a valid size for the configuration */ else if (rx.desc.rx_len < ETH_HDRLEN || rx.desc.rx_len > (CONFIG_NET_ETH_PKTSIZE + 2)) { nerr("ERROR: RX length error\n"); NETDEV_RXERRORS(&priv->dm_dev); /* Drop this packet and continue to check the next packet */ priv->dm_discard(rx.desc.rx_len); } else { /* Good packet... * Copy the packet data out of SRAM and pass it one to the network */ priv->dm_dev.d_len = rx.desc.rx_len; priv->dm_read(priv->dm_dev.d_buf, rx.desc.rx_len); #ifdef CONFIG_NET_PKT /* When packet sockets are enabled, feed the frame into the tap */ pkt_input(&priv->dm_dev); #endif /* We accept IP packets of the configured type and ARP packets */ #ifdef CONFIG_NET_IPv4 if (BUF->type == HTONS(ETHTYPE_IP)) { ninfo("IPv4 frame\n"); NETDEV_RXIPV4(&priv->dm_dev); /* Handle ARP on input then give the IPv4 packet to the network * layer */ arp_ipin(&priv->dm_dev); ipv4_input(&priv->dm_dev); /* If the above function invocation resulted in data that * should be sent out on the network, the field d_len will * set to a value > 0. */ if (priv->dm_dev.d_len > 0) { /* Update Ethernet header with the correct MAC address */ #ifdef CONFIG_NET_IPv6 if (IFF_IS_IPv4(priv->dm_dev.d_flags)) #endif { arp_out(&priv->dm_dev); } #ifdef CONFIG_NET_IPv6 else { neighbor_out(&priv->dm_dev); } #endif /* And send the packet */ dm9x_transmit(priv); } } else #endif #ifdef CONFIG_NET_IPv6 if (BUF->type == HTONS(ETHTYPE_IP6)) { ninfo("IPv6 frame\n"); NETDEV_RXIPV6(&priv->dm_dev); /* Give the IPv6 packet to the network layer */ ipv6_input(&priv->dm_dev); /* If the above function invocation resulted in data that * should be sent out on the network, the field d_len will * set to a value > 0. */ if (priv->dm_dev.d_len > 0) { /* Update Ethernet header with the correct MAC address */ #ifdef CONFIG_NET_IPv4 if (IFF_IS_IPv4(priv->dm_dev.d_flags)) { arp_out(&priv->dm_dev); } else #endif #ifdef CONFIG_NET_IPv6 { neighbor_out(&priv->dm_dev); } #endif /* And send the packet */ dm9x_transmit(priv); } } else #endif #ifdef CONFIG_NET_ARP if (BUF->type == htons(ETHTYPE_ARP)) { arp_arpin(&priv->dm_dev); NETDEV_RXARP(&priv->dm_dev); /* If the above function invocation resulted in data that * should be sent out on the network, the field d_len will set * to a value > 0. */ if (priv->dm_dev.d_len > 0) { dm9x_transmit(priv); } } #endif else { NETDEV_RXDROPPED(&priv->dm_dev); } } NETDEV_RXPACKETS(&priv->dm_dev); priv->ncrxpackets++; } while ((rxbyte & 0x01) == DM9X_PKTRDY && priv->ncrxpackets < DM9X_CRXTHRES); ninfo("All RX packets processed\n"); } /**************************************************************************** * Name: dm9x_txdone * * Description: * An interrupt was received indicating that the last TX packet(s) is done * * Input Parameters: * priv - Reference to the driver state structure * * Returned Value: * None * * Assumptions: * ****************************************************************************/ static void dm9x_txdone(FAR struct dm9x_driver_s *priv) { int nsr; ninfo("TX done\n"); /* Another packet has completed transmission. Decrement the count of * of pending TX transmissions. */ nsr = getreg(DM9X_NETS); if (nsr & DM9X_NETS_TX1END) { if (priv->dm_ntxpending) { priv->dm_ntxpending--; } else { nerr("ERROR: Bad TX count (TX1END)\n"); } } if (nsr & DM9X_NETS_TX2END) { if (priv->dm_ntxpending) { priv->dm_ntxpending--; } else { nerr("ERROR: Bad TX count (TX2END)\n"); } } /* Cancel the TX timeout */ if (priv->dm_ntxpending == 0) { wd_cancel(&priv->dm_txtimeout); } /* Then poll the network for new XMIT data */ devif_poll(&priv->dm_dev, dm9x_txpoll); } /**************************************************************************** * Name: dm9x_interrupt_work * * Description: * Perform interrupt related work from the worker thread * * Input Parameters: * arg - The argument passed when work_queue() was called. * * Returned Value: * OK on success * * Assumptions: * The network is locked. * ****************************************************************************/ static void dm9x_interrupt_work(FAR void *arg) { FAR struct dm9x_driver_s *priv = (FAR struct dm9x_driver_s *)arg; uint8_t isr; uint8_t save; int i; /* Process pending Ethernet interrupts */ net_lock(); /* Save previous register address */ save = (uint8_t)DM9X_INDEX; /* Disable all DM90x0 interrupts */ putreg(DM9X_IMR, DM9X_IMRDISABLE); /* Get and clear the DM90x0 interrupt status bits */ isr = getreg(DM9X_ISR); putreg(DM9X_ISR, isr); ninfo("Interrupt status: %02x\n", isr); /* Check for link status change */ if (isr & DM9X_INT_LNKCHG) { /* Wait up to 0.5s for link OK */ for (i = 0; i < 500; i++) { dm9x_phyread(priv, 0x1); if (dm9x_phyread(priv, 0x1) & 0x4) /* Link OK */ { /* Wait to get detected speed */ for (i = 0; i < 200; i++) { up_mdelay(1); } /* Set the new network speed */ if (dm9x_phyread(priv, 0) & 0x2000) { priv->dm_b100m = true; } else { priv->dm_b100m = false; } break; } up_mdelay(1); } nerr("ERROR: delay: %dmS speed: %s\n", i, priv->dm_b100m ? "100M" : "10M"); } /* Check if we received an incoming packet */ if (isr & DM9X_INT_PR) { dm9x_receive(priv); } /* Check if we are able to transmit a packet */ if (isr & DM9X_INT_PT) { dm9x_txdone(priv); } /* If the number of consecutive receive packets exceeds a threshold, * then disable the RX interrupt. */ if (priv->ncrxpackets >= DM9X_CRXTHRES) { /* Enable all DM90x0 interrupts EXCEPT for RX */ putreg(DM9X_IMR, DM9X_IMRRXDISABLE); } else { /* Enable all DM90x0 interrupts */ putreg(DM9X_IMR, DM9X_IMRENABLE); } /* Restore previous register address */ DM9X_INDEX = save; net_unlock(); /* Re-enable Ethernet interrupts */ up_enable_irq(CONFIG_DM9X_IRQ); } /**************************************************************************** * Name: dm9x_interrupt * * Description: * Hardware interrupt handler * * Input Parameters: * irq - Number of the IRQ that generated the interrupt * context - Interrupt register state save info (architecture-specific) * * Returned Value: * OK on success * * Assumptions: * ****************************************************************************/ static int dm9x_interrupt(int irq, FAR void *context, FAR void *arg) { #if CONFIG_DM9X_NINTERFACES == 1 FAR struct dm9x_driver_s *priv = &g_dm9x[0]; #else # error "Additional logic needed to support multiple interfaces" #endif uint8_t isr; /* Disable further Ethernet interrupts. Because Ethernet interrupts are * also disabled if the TX timeout event occurs, there can be no race * condition here. */ up_disable_irq(CONFIG_DM9X_IRQ); /* Determine if a TX transfer just completed */ isr = getreg(DM9X_ISR); if ((isr & DM9X_INT_PT) != 0) { /* If a TX transfer just completed, then cancel the TX timeout so * there will be no race condition between any subsequent timeout * expiration and the deferred interrupt processing. */ wd_cancel(&priv->dm_txtimeout); } /* Schedule to perform the interrupt processing on the worker thread. */ work_queue(ETHWORK, &priv->dm_irqwork, dm9x_interrupt_work, priv, 0); return OK; } /**************************************************************************** * Name: dm9x_txtimeout_work * * Description: * Perform TX timeout related work from the worker thread * * Input Parameters: * arg - The argument passed when work_queue() as called. * * Returned Value: * OK on success * * Assumptions: * The network is locked. * ****************************************************************************/ static void dm9x_txtimeout_work(FAR void *arg) { FAR struct dm9x_driver_s *priv = (FAR struct dm9x_driver_s *)arg; nerr("ERROR: TX timeout\n"); /* Increment statistics and dump debug info */ net_lock(); NETDEV_TXTIMEOUTS(priv->dm_dev); ninfo(" TX packet count: %d\n", priv->dm_ntxpending); ninfo(" TX read pointer address: 0x%02x:%02x\n", getreg(DM9X_TRPAH), getreg(DM9X_TRPAL)); ninfo(" Memory data write address: 0x%02x:%02x (DM9010)\n", getreg(DM9X_MDWAH), getreg(DM9X_MDWAL)); /* Then reset the DM90x0 */ dm9x_reset(priv); /* Then poll the network for new XMIT data */ devif_poll(&priv->dm_dev, dm9x_txpoll); net_unlock(); } /**************************************************************************** * Name: dm9x_txtimeout_expiry * * Description: * Our TX watchdog timed out. Called from the timer interrupt handler. * The last TX never completed. Reset the hardware and start again. * * Input Parameters: * arg - The argument * * Returned Value: * None * * Assumptions: * Global interrupts are disabled by the watchdog logic. * ****************************************************************************/ static void dm9x_txtimeout_expiry(wdparm_t arg) { FAR struct dm9x_driver_s *priv = (FAR struct dm9x_driver_s *)arg; /* Disable further Ethernet interrupts. This will prevent some race * conditions with interrupt work. There is still a potential race * condition with interrupt work that is already queued and in progress. */ up_disable_irq(CONFIG_DM9X_IRQ); /* Schedule to perform the TX timeout processing on the worker thread. */ work_queue(ETHWORK, &priv->dm_irqwork, dm9x_txtimeout_work, priv, 0); } /**************************************************************************** * Name: dm9x_poll_work * * Description: * Perform periodic polling from the worker thread * * Input Parameters: * arg - The argument passed when work_queue() as called. * * Returned Value: * OK on success * * Assumptions: * The network is locked. * ****************************************************************************/ static void dm9x_poll_work(FAR void *arg) { FAR struct dm9x_driver_s *priv = (FAR struct dm9x_driver_s *)arg; /* Perform the poll */ net_lock(); /* If the number of contiguous RX packets exceeds a threshold, reset the * counter and re-enable RX interrupts */ if (priv->ncrxpackets >= DM9X_CRXTHRES) { priv->ncrxpackets = 0; putreg(DM9X_IMR, DM9X_IMRENABLE); } /* Check if there is room in the DM90x0 to hold another packet. In 100M * mode, that can be 2 packets, otherwise it is a single packet. */ if (priv->dm_ntxpending < 1 || (priv->dm_b100m && priv->dm_ntxpending < 2)) { /* Update TCP timing states and poll the network for new XMIT data */ devif_timer(&priv->dm_dev, DM9X_WDDELAY, dm9x_txpoll); } /* Setup the watchdog poll timer again */ wd_start(&priv->dm_txpoll, DM9X_WDDELAY, dm9x_poll_expiry, (wdparm_t)priv); net_unlock(); } /**************************************************************************** * Name: dm9x_poll_expiry * * Description: * Periodic timer handler. Called from the timer interrupt handler. * * Input Parameters: * arg - The argument * * Returned Value: * None * * Assumptions: * Global interrupts are disabled by the watchdog logic. * ****************************************************************************/ static void dm9x_poll_expiry(wdparm_t arg) { FAR struct dm9x_driver_s *priv = (FAR struct dm9x_driver_s *)arg; /* Schedule to perform the interrupt processing on the worker thread. */ work_queue(ETHWORK, &priv->dm_pollwork, dm9x_poll_work, priv, 0); } /**************************************************************************** * Name: dm9x_phymode * * Description: * Configure the PHY operating mode * * Input Parameters: * priv - Reference to the driver state structure * * Returned Value: * None * * Assumptions: * ****************************************************************************/ static inline void dm9x_phymode(FAR struct dm9x_driver_s *priv) { uint16_t phyreg0; uint16_t phyreg4; #ifdef CONFIG_DM9X_MODE_AUTO phyreg0 = 0x1200; /* Auto-negotiation & Restart Auto-negotiation */ phyreg4 = 0x01e1; /* Default flow control disable */ #elif defined(CONFIG_DM9X_MODE_10MHD) phyreg4 = 0x21; phyreg0 = 0x1000; #elif defined(CONFIG_DM9X_MODE_10MFD) phyreg4 = 0x41; phyreg0 = 0x1100; #elif defined(CONFIG_DM9X_MODE_100MHD) phyreg4 = 0x81; phyreg0 = 0x3000; #elif defined(CONFIG_DM9X_MODE_100MFD) phyreg4 = 0x101; phyreg0 = 0x3100; #else # error "Recognized PHY mode" #endif dm9x_phywrite(priv, 0, phyreg0); dm9x_phywrite(priv, 4, phyreg4); } /**************************************************************************** * Name: dm9x_ifup * * Description: * NuttX Callback: Bring up the DM90x0 interface when an IP address is * provided * * Input Parameters: * dev - Reference to the NuttX driver state structure * * Returned Value: * None * * Assumptions: * ****************************************************************************/ static int dm9x_ifup(FAR struct net_driver_s *dev) { FAR struct dm9x_driver_s *priv = (FAR struct dm9x_driver_s *)dev->d_private; uint8_t netstatus; int i; ninfo("Bringing up: %d.%d.%d.%d\n", (int)(dev->d_ipaddr & 0xff), (int)((dev->d_ipaddr >> 8) & 0xff), (int)((dev->d_ipaddr >> 16) & 0xff), (int)(dev->d_ipaddr >> 24)); /* Initialize DM90x0 chip */ dm9x_bringup(priv); /* Check link state and media speed (waiting up to 3s for link OK) */ priv->dm_b100m = false; for (i = 0; i < 3000; i++) { netstatus = getreg(DM9X_NETS); if (netstatus & DM9X_NETS_LINKST) { /* Link OK... Wait a bit before getting the detected speed */ up_mdelay(200); netstatus = getreg(DM9X_NETS); if ((netstatus & DM9X_NETS_SPEED) == 0) { priv->dm_b100m = true; } break; } i++; up_mdelay(1); } ninfo("delay: %dmS speed: %s\n", i, priv->dm_b100m ? "100M" : "10M"); /* Set and activate a timer process */ wd_start(&priv->dm_txpoll, DM9X_WDDELAY, dm9x_poll_expiry, (wdparm_t)priv); /* Enable the DM9X interrupt */ priv->dm_bifup = true; up_enable_irq(CONFIG_DM9X_IRQ); return OK; } /**************************************************************************** * Name: dm9x_ifdown * * Description: * NuttX Callback: Stop the interface. * * Input Parameters: * dev - Reference to the NuttX driver state structure * * Returned Value: * None * * Assumptions: * ****************************************************************************/ static int dm9x_ifdown(FAR struct net_driver_s *dev) { FAR struct dm9x_driver_s *priv = (FAR struct dm9x_driver_s *)dev->d_private; irqstate_t flags; ninfo("Stopping\n"); /* Disable the DM9X interrupt */ flags = enter_critical_section(); up_disable_irq(CONFIG_DM9X_IRQ); /* Cancel the TX poll timer and TX timeout timers */ wd_cancel(&priv->dm_txpoll); wd_cancel(&priv->dm_txtimeout); /* Reset the device */ dm9x_phywrite(priv, 0x00, 0x8000); /* PHY reset */ putreg(DM9X_GPD, 0x01); /* Power-down PHY (GEPIO0=1) */ putreg(DM9X_IMR, DM9X_IMRDISABLE); /* Disable all interrupts */ putreg(DM9X_RXC, 0x00); /* Disable RX */ putreg(DM9X_ISR, DM9X_INT_ALL); /* Clear interrupt status */ priv->dm_bifup = false; leave_critical_section(flags); return OK; } /**************************************************************************** * Name: dm9x_txavail_work * * Description: * Perform an out-of-cycle poll on the worker thread. * * Input Parameters: * arg - Reference to the NuttX driver state structure (cast to void*) * * Returned Value: * None * * Assumptions: * Called on the higher priority worker thread. * ****************************************************************************/ static void dm9x_txavail_work(FAR void *arg) { FAR struct dm9x_driver_s *priv = (FAR struct dm9x_driver_s *)arg; ninfo("Polling\n"); /* Ignore the notification if the interface is not yet up */ net_lock(); if (priv->dm_bifup) { /* Check if there is room in the DM90x0 to hold another packet. In 100M * mode, that can be 2 packets, otherwise it is a single packet. */ if (priv->dm_ntxpending < 1 || (priv->dm_b100m && priv->dm_ntxpending < 2)) { /* If so, then poll the network for new XMIT data */ devif_timer(&priv->dm_dev, 0, dm9x_txpoll); } } net_unlock(); } /**************************************************************************** * Name: dm9x_txavail * * Description: * Driver callback invoked when new TX data is available. This is a * stimulus perform an out-of-cycle poll and, thereby, reduce the TX * latency. * * Input Parameters: * dev - Reference to the NuttX driver state structure * * Returned Value: * None * * Assumptions: * Called in normal user mode * ****************************************************************************/ static int dm9x_txavail(FAR struct net_driver_s *dev) { FAR struct dm9x_driver_s *priv = (FAR struct dm9x_driver_s *)dev->d_private; /* Is our single work structure available? It may not be if there are * pending interrupt actions and we will have to ignore the Tx * availability action. */ if (work_available(&priv->dm_pollwork)) { /* Schedule to serialize the poll on the worker thread. */ work_queue(ETHWORK, &priv->dm_pollwork, dm9x_txavail_work, priv, 0); } return OK; } /**************************************************************************** * Name: dm9x_addmac * * Description: * NuttX Callback: Add the specified MAC address to the hardware multicast * address filtering * * Input Parameters: * dev - Reference to the NuttX driver state structure * mac - The MAC address to be added * * Returned Value: * None * * Assumptions: * ****************************************************************************/ #ifdef CONFIG_NET_MCASTGROUP static int dm9x_addmac(FAR struct net_driver_s *dev, FAR const uint8_t *mac) { FAR struct dm9x_driver_s *priv = (FAR struct dm9x_driver_s *)dev->d_private; /* Add the MAC address to the hardware multicast routing table */ #warning "Multicast MAC support not implemented" return OK; } #endif /**************************************************************************** * Name: dm9x_rmmac * * Description: * NuttX Callback: Remove the specified MAC address from the hardware * multicast address filtering * * Input Parameters: * dev - Reference to the NuttX driver state structure * mac - The MAC address to be removed * * Returned Value: * None * * Assumptions: * ****************************************************************************/ #ifdef CONFIG_NET_MCASTGROUP static int dm9x_rmmac(FAR struct net_driver_s *dev, FAR const uint8_t *mac) { FAR struct dm9x_driver_s *priv = (FAR struct dm9x_driver_s *)dev->d_private; /* Add the MAC address to the hardware multicast routing table */ #warning "Multicast MAC support not implemented" return OK; } #endif /**************************************************************************** * Name: dm9x_bringup * * Description: * Initialize the dm90x0 chip * * Input Parameters: * priv - Reference to the driver state structure * * Returned Value: * None * * Assumptions: * ****************************************************************************/ static void dm9x_bringup(FAR struct dm9x_driver_s *priv) { ninfo("Initializing\n"); /* Set the internal PHY power-on, GPIOs normal, and wait 2ms */ putreg(DM9X_GPD, 0x01); /* Power-down the PHY (GEPIO0=1) */ up_udelay(500); putreg(DM9X_GPD, 0x00); /* Preactivate PHY (GPIO0=0 */ up_udelay(20); /* Wait 20us for PHY power-on ready */ /* Do a software reset and wait 20us (twice). The reset autoclears * in 10us; 20us guarantees completion of the reset */ putreg(DM9X_NETC, (DM9X_NETC_RST | DM9X_NETC_LBK1)); up_udelay(20); putreg(DM9X_NETC, (DM9X_NETC_RST | DM9X_NETC_LBK1)); up_udelay(20); /* Configure I/O mode */ switch (getreg(DM9X_ISR) & DM9X_ISR_IOMODEM) { case DM9X_ISR_IOMODE8: priv->dm_read = read8; priv->dm_write = write8; priv->dm_discard = discard8; break; case DM9X_ISR_IOMODE16: priv->dm_read = read16; priv->dm_write = write16; priv->dm_discard = discard16; break; case DM9X_ISR_IOMODE32: priv->dm_read = read32; priv->dm_write = write32; priv->dm_discard = discard32; break; default: break; } /* Program PHY operating mode */ dm9x_phymode(priv); /* Program operating mode */ putreg(DM9X_NETC, 0x00); /* Network control */ putreg(DM9X_TXC, 0x00); /* Clear TX Polling */ putreg(DM9X_BPTHRES, 0x3f); /* Less 3kb, 600us */ putreg(DM9X_SMODEC, 0x00); /* Special mode */ /* Clear TX status */ putreg(DM9X_NETS, DM9X_NETS_WAKEST | DM9X_NETS_TX1END | DM9X_NETS_TX2END); putreg(DM9X_ISR, DM9X_INT_ALL); /* Clear interrupt status */ #if defined(CONFIG_DM9X_CHECKSUM) putreg(DM9X_TCCR, 0x07); /* TX UDP/TCP/IP checksum enable */ putreg(DM9X_RCSR, 0x02); /* Receive checksum enable */ #endif #if defined(CONFIG_DM9X_ETRANS) putreg(DM9X_ETXCSR, 0x83); #endif /* Initialize statistics */ priv->ncrxpackets = 0; /* Number of continuous RX packets */ priv->dm_ntxpending = 0; /* Number of pending TX packets */ NETDEV_RESET_STATISTICS(&priv->dm_dev); /* Activate DM9000A/DM9010 */ putreg(DM9X_RXC, DM9X_RXCSETUP | 1); /* RX enable */ putreg(DM9X_IMR, DM9X_IMRENABLE); /* Enable TX/RX interrupts */ } /**************************************************************************** * Name: dm9x_reset * * Description: * Stop, reset, re-initialize, and restart the DM90x0 chip and driver. At * present, the chip is only reset after a TX timeout. * * Input Parameters: * priv - Reference to the driver state structure * * Returned Value: * None * * Assumptions: * ****************************************************************************/ static void dm9x_reset(FAR struct dm9x_driver_s *priv) { uint8_t save; int i; /* Cancel the TX poll timer and TX timeout timers */ wd_cancel(&priv->dm_txpoll); wd_cancel(&priv->dm_txtimeout); /* Save previous register address */ save = (uint8_t)DM9X_INDEX; dm9x_bringup(priv); /* Wait up to 1 second for the link to be OK */ priv->dm_b100m = false; for (i = 0; i < 1000; i++) { if (dm9x_phyread(priv, 0x1) & 0x4) { if (dm9x_phyread(priv, 0) & 0x2000) { priv->dm_b100m = true; } break; } up_mdelay(1); } /* Restore previous register address */ DM9X_INDEX = save; } /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: dm9x_initialize * * Description: * Initialize the DM90x0 driver * * Input Parameters: * None * * Returned Value: * OK on success; Negated errno on failure. * * Assumptions: * ****************************************************************************/ /* Initialize the DM90x0 chip and driver */ int dm9x_initialize(void) { uint8_t *mptr; uint16_t vid; uint16_t pid; int i; int j; /* Get the chip vendor ID and product ID */ vid = (((uint16_t)getreg(DM9X_VIDH)) << 8) | (uint16_t)getreg(DM9X_VIDL); pid = (((uint16_t)getreg(DM9X_PIDH)) << 8) | (uint16_t)getreg(DM9X_PIDL); ninfo("I/O base: %08x VID: %04x PID: %04x\n", CONFIG_DM9X_BASE, vid, pid); /* Check if a DM90x0 chip is recognized at this I/O base */ if (vid != DM9X_DAVICOMVID || (pid != DM9X_DM9000PID && pid != DM9X_DM9010PID)) { nerr("ERROR: vendor/product ID not found at this base address\n"); return -ENODEV; } /* Attach the IRQ to the driver */ if (irq_attach(CONFIG_DM9X_IRQ, dm9x_interrupt, NULL)) { /* We could not attach the ISR to the ISR */ nerr("ERROR: irq_attach() failed\n"); return -EAGAIN; } /* Initialize the driver structure */ memset(g_dm9x, 0, CONFIG_DM9X_NINTERFACES*sizeof(struct dm9x_driver_s)); g_dm9x[0].dm_dev.d_buf = g_pktbuf; /* Single packet buffer */ g_dm9x[0].dm_dev.d_ifup = dm9x_ifup; /* I/F down callback */ g_dm9x[0].dm_dev.d_ifdown = dm9x_ifdown; /* I/F up (new IP address) callback */ g_dm9x[0].dm_dev.d_txavail = dm9x_txavail; /* New TX data callback */ #ifdef CONFIG_NET_MCASTGROUP g_dm9x[0].dm_dev.d_addmac = dm9x_addmac; /* Add multicast MAC address */ g_dm9x[0].dm_dev.d_rmmac = dm9x_rmmac; /* Remove multicast MAC address */ #endif g_dm9x[0].dm_dev.d_private = g_dm9x; /* Used to recover private state from dev */ /* Read the MAC address */ mptr = g_dm9x[0].dm_dev.d_mac.ether.ether_addr_octet; for (i = 0, j = DM9X_PAB0; i < ETHER_ADDR_LEN; i++, j++) { mptr[i] = getreg(j); } ninfo("MAC: %0x:%0x:%0x:%0x:%0x:%0x\n", mptr[0], mptr[1], mptr[2], mptr[3], mptr[4], mptr[5]); /* Register the device with the OS so that socket IOCTLs can be performed */ netdev_register(&g_dm9x[0].dm_dev, NET_LL_ETHERNET); return OK; } #endif /* CONFIG_NET && CONFIG_NET_DM90x0 */