/**************************************************************************** * arch/arm/src/sama5/sam_emaca.c * * 10/100 Base-T Ethernet driver for the SAMA5D3. Denoted as 'A' to * distinguish it from the SAMA5D4 EMAC driver. * * Copyright (C) 2013-2014 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * References: * SAMA5D3 Series Data Sheet * Atmel NoOS sample code. * * The Atmel sample code has a BSD compatible license that requires this * copyright notice: * * Copyright (c) 2012, Atmel Corporation * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the names NuttX nor Atmel nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "up_arch.h" #include "up_internal.h" #include "cache.h" #include "chip.h" #include "chip/sam_pinmap.h" #include "sam_pio.h" #include "sam_periphclks.h" #include "sam_memories.h" #include "sam_ethernet.h" #include #if defined(CONFIG_NET) && defined(CONFIG_SAMA5_EMACA) /**************************************************************************** * Preprocessor Definitions ****************************************************************************/ /* Configuration ************************************************************/ /* Number of buffers for RX */ #ifndef CONFIG_SAMA5_EMAC_NRXBUFFERS # define CONFIG_SAMA5_EMAC_NRXBUFFERS 16 #endif /* Number of buffers for TX */ #ifndef CONFIG_SAMA5_EMAC_NTXBUFFERS # define CONFIG_SAMA5_EMAC_NTXBUFFERS 8 #endif #undef CONFIG_SAMA5_EMACA_NBC #ifndef CONFIG_SAMA5_EMAC_PHYADDR # error "CONFIG_SAMA5_EMAC_PHYADDR must be defined in the NuttX configuration" #endif #if !defined(CONFIG_SAMA5_EMAC_MII) && !defined(CONFIG_SAMA5_EMAC_RMII) # warning "Neither CONFIG_SAMA5_EMAC_MII nor CONFIG_SAMA5_EMAC_RMII defined" #endif #if defined(CONFIG_SAMA5_EMAC_MII) && defined(CONFIG_SAMA5_EMAC_RMII) # error "Both CONFIG_SAMA5_EMAC_MII and CONFIG_SAMA5_EMAC_RMII defined" #endif #ifdef CONFIG_SAMA5_EMAC_AUTONEG # ifndef CONFIG_SAMA5_EMAC_PHYSR # error "CONFIG_SAMA5_EMAC_PHYSR must be defined in the NuttX configuration" # endif # ifdef CONFIG_SAMA5_EMAC_PHYSR_ALTCONFIG # ifndef CONFIG_SAMA5_EMAC_PHYSR_ALTMODE # error "CONFIG_SAMA5_EMAC_PHYSR_ALTMODE must be defined in the NuttX configuration" # endif # ifndef CONFIG_SAMA5_EMAC_PHYSR_10HD # error "CONFIG_SAMA5_EMAC_PHYSR_10HD must be defined in the NuttX configuration" # endif # ifndef CONFIG_SAMA5_EMAC_PHYSR_100HD # error "CONFIG_SAMA5_EMAC_PHYSR_100HD must be defined in the NuttX configuration" # endif # ifndef CONFIG_SAMA5_EMAC_PHYSR_10FD # error "CONFIG_SAMA5_EMAC_PHYSR_10FD must be defined in the NuttX configuration" # endif # ifndef CONFIG_SAMA5_EMAC_PHYSR_100FD # error "CONFIG_SAMA5_EMAC_PHYSR_100FD must be defined in the NuttX configuration" # endif # else # ifndef CONFIG_SAMA5_EMAC_PHYSR_SPEED # error "CONFIG_SAMA5_EMAC_PHYSR_SPEED must be defined in the NuttX configuration" # endif # ifndef CONFIG_SAMA5_EMAC_PHYSR_100MBPS # error "CONFIG_SAMA5_EMAC_PHYSR_100MBPS must be defined in the NuttX configuration" # endif # ifndef CONFIG_SAMA5_EMAC_PHYSR_MODE # error "CONFIG_SAMA5_EMAC_PHYSR_MODE must be defined in the NuttX configuration" # endif # ifndef CONFIG_SAMA5_EMAC_PHYSR_FULLDUPLEX # error "CONFIG_SAMA5_EMAC_PHYSR_FULLDUPLEX must be defined in the NuttX configuration" # endif # endif #endif /* PHY definitions */ #if defined(SAMA5_EMAC_PHY_DM9161) # define MII_OUI_MSB 0x0181 # define MII_OUI_LSB 0x2e #elif defined(SAMA5_EMAC_PHY_LAN8700) # define MII_OUI_MSB 0x0007 # define MII_OUI_LSB 0x30 #elif defined(SAMA5_EMAC_PHY_KSZ8051) # define MII_OUI_MSB 0x0022 # define MII_OUI_LSB 0x05 #elif defined(SAMA5_EMAC_PHY_KSZ8081) # define MII_OUI_MSB 0x0022 # define MII_OUI_LSB 0x05 #else # error EMAC PHY unrecognized #endif #ifdef CONFIG_SAMA5_EMAC_PHYSR_ALTCONFIG # define PHYSR_MODE(sr) ((sr) & CONFIG_SAMA5_EMAC_PHYSR_ALTMODE) # define PHYSR_ISMODE(sr,m) (PHYSR_MODE(sr) == (m)) # define PHYSR_IS10HDX(sr) PHYSR_ISMODE(sr,CONFIG_SAMA5_EMAC_PHYSR_10HD) # define PHYSR_IS100HDX(sr) PHYSR_ISMODE(sr,CONFIG_SAMA5_EMAC_PHYSR_100HD) # define PHYSR_IS10FDX(sr) PHYSR_ISMODE(sr,CONFIG_SAMA5_EMAC_PHYSR_10FD) # define PHYSR_IS100FDX(sr) PHYSR_ISMODE(sr,CONFIG_SAMA5_EMAC_PHYSR_100FD) #else # define PHYSR_MODESPEED (CONFIG_PHYSR_MODE | CONFIG_PHYSR_SPEED) # define PHYSR_10HDX (0) # define PHYSR_100HDX (CONFIG_PHYSR_100MBPS) # define PHYSR_10FDX (CONFIG_PHYSR_FULLDUPLEX) # define PHYSR_100FDX (CONFIG_PHYSR_FULLDUPLEX | CONFIG_PHYSR_100MBPS) # define PHYSR_IS10HDX(sr) (((sr) & PHYSR_MODESPEED) == PHYSR_10HDX) # define PHYSR_IS100HDX(sr) (((sr) & PHYSR_MODESPEED) == PHYSR_100HDX) # define PHYSR_IS10FDX(sr) (((sr) & PHYSR_MODESPEED) == PHYSR_10FDX) # define PHYSR_IS100FDX(sr) (((sr) & PHYSR_MODESPEED) == PHYSR_100FDX) #endif /* EMAC buffer sizes, number of buffers, and number of descriptors. * * REVISIT: The CONFIG_NET_MULTIBUFFER might be useful. It might be possible * to use this option to send and receive messages directly into the DMA * buffers, saving a copy. There might be complications on the receiving * side, however, where buffers may wrap and where the size of the received * frame will typically be smaller than a full packet. */ #ifdef CONFIG_NET_MULTIBUFFER # error CONFIG_NET_MULTIBUFFER must not be set #endif #define EMAC_RX_UNITSIZE 128 /* Fixed size for RX buffer */ #define EMAC_TX_UNITSIZE CONFIG_NET_BUFSIZE /* MAX size for Ethernet packet */ /* We need at least one more free buffer than transmit buffers */ #define SAM_EMAC_NFREEBUFFERS (CONFIG_SAMA5_EMAC_NTXBUFFERS+1) /* Extremely detailed register debug that you would normally never want * enabled. */ #ifndef CONFIG_DEBUG # undef CONFIG_SAMA5_EMACA_REGDEBUG #endif #ifdef CONFIG_NET_DUMPPACKET # define sam_dumppacket(m,a,n) lib_dumpbuffer(m,a,n) #else # define sam_dumppacket(m,a,n) #endif /* Timing *******************************************************************/ /* TX poll delay = 1 seconds. CLK_TCK is the number of clock ticks per * second */ #define SAM_WDDELAY (1*CLK_TCK) #define SAM_POLLHSEC (1*2) /* TX timeout = 1 minute */ #define SAM_TXTIMEOUT (60*CLK_TCK) /* PHY read/write delays in loop counts */ #define PHY_RETRY_MAX 1000000 /* Helpers ******************************************************************/ /* This is a helper pointer for accessing the contents of the EMAC * header */ #define BUF ((struct uip_eth_hdr *)priv->dev.d_buf) /**************************************************************************** * Private Types ****************************************************************************/ /* The sam_emac_s encapsulates all state information for the EMAC peripheral */ struct sam_emac_s { uint8_t ifup : 1; /* true:ifup false:ifdown */ WDOG_ID txpoll; /* TX poll timer */ WDOG_ID txtimeout; /* TX timeout timer */ /* This holds the information visible to uIP/NuttX */ struct uip_driver_s dev; /* Interface understood by uIP */ /* Used to track transmit and receive descriptors */ uint8_t phyaddr; /* PHY address (pre-defined by pins on reset) */ uint16_t txhead; /* Circular buffer head index */ uint16_t txtail; /* Circular buffer tail index */ uint16_t rxndx; /* RX index for current processing RX descriptor */ uint8_t *rxbuffer; /* Allocated RX buffers */ uint8_t *txbuffer; /* Allocated TX buffers */ struct emac_rxdesc_s *rxdesc; /* Allocated RX descriptors */ struct emac_txdesc_s *txdesc; /* Allocated TX descriptors */ /* Debug stuff */ #ifdef CONFIG_SAMA5_EMACA_REGDEBUG bool wrlast; /* Last was a write */ uintptr_t addrlast; /* Last address */ uint32_t vallast; /* Last value */ int ntimes; /* Number of times */ #endif }; /**************************************************************************** * Private Data ****************************************************************************/ /* The driver state singleton */ static struct sam_emac_s g_emac; #ifdef CONFIG_SAMA5_EMACA_PREALLOCATE /* Preallocated data */ /* TX descriptors list */ static struct emac_txdesc_s g_txdesc[CONFIG_SAMA5_EMAC_NTXBUFFERS] __attribute__((aligned(8))); /* RX descriptors list */ static struct emac_rxdesc_s g_rxdesc[CONFIG_SAMA5_EMAC_NRXBUFFERS] __attribute__((aligned(8))); /* Transmit Buffers * * Section 3.6 of AMBA 2.0 spec states that burst should not cross 1K Boundaries. * Receive buffer manager writes are burst of 2 words => 3 lsb bits of the address * shall be set to 0 */ static uint8_t g_txbuffer[CONFIG_SAMA5_EMAC_NTXBUFFERS * EMAC_TX_UNITSIZE]; __attribute__((aligned(8))) /* Receive Buffers */ static uint8_t g_rxbuffer[CONFIG_SAMA5_EMAC_NRXBUFFERS * EMAC_RX_UNITSIZE] __attribute__((aligned(8))); #endif /**************************************************************************** * Private Function Prototypes ****************************************************************************/ /* Register operations ******************************************************/ #if defined(CONFIG_SAMA5_EMACA_REGDEBUG) && defined(CONFIG_DEBUG) static bool sam_checkreg(struct sam_emac_s *priv, bool wr, uint32_t regval, uintptr_t address); static uint32_t sam_getreg(struct sam_emac_s *priv, uintptr_t addr); static void sam_putreg(struct sam_emac_s *priv, uintptr_t addr, uint32_t val); #else # define sam_getreg(priv,addr) getreg32(addr) # define sam_putreg(priv,addr,val) putreg32(val,addr) #endif /* Buffer management */ static uint16_t sam_txinuse(struct sam_emac_s *priv); static uint16_t sam_txfree(struct sam_emac_s *priv); static int sam_buffer_initialize(struct sam_emac_s *priv); static void sam_buffer_free(struct sam_emac_s *priv); /* Common TX logic */ static int sam_transmit(struct sam_emac_s *priv); static int sam_uiptxpoll(struct uip_driver_s *dev); static void sam_dopoll(struct sam_emac_s *priv); /* Interrupt handling */ static int sam_recvframe(struct sam_emac_s *priv); static void sam_receive(struct sam_emac_s *priv); static void sam_txdone(struct sam_emac_s *priv); static int sam_emac_interrupt(int irq, void *context); /* Watchdog timer expirations */ static void sam_polltimer(int argc, uint32_t arg, ...); static void sam_txtimeout(int argc, uint32_t arg, ...); /* NuttX callback functions */ static int sam_ifup(struct uip_driver_s *dev); static int sam_ifdown(struct uip_driver_s *dev); static int sam_txavail(struct uip_driver_s *dev); #ifdef CONFIG_NET_IGMP static int sam_addmac(struct uip_driver_s *dev, const uint8_t *mac); static int sam_rmmac(struct uip_driver_s *dev, const uint8_t *mac); #endif /* PHY Initialization */ #if defined(CONFIG_DEBUG_NET) && defined(CONFIG_DEBUG_VERBOSE) static void sam_phydump(struct sam_emac_s *priv); #else # define sam_phydump(priv) #endif static int sam_phywait(struct sam_emac_s *priv); static int sam_phyreset(struct sam_emac_s *priv); static int sam_phyfind(struct sam_emac_s *priv, uint8_t *phyaddr); static int sam_phyread(struct sam_emac_s *priv, uint8_t phyaddr, uint8_t regaddr, uint16_t *phyval); static int sam_phywrite(struct sam_emac_s *priv, uint8_t phyaddr, uint8_t regaddr, uint16_t phyval); static int sam_autonegotiate(struct sam_emac_s *priv); static bool sam_linkup(struct sam_emac_s *priv); static int sam_phyinit(struct sam_emac_s *priv); /* EMAC Initialization */ static void sam_txreset(struct sam_emac_s *priv); static void sam_rxreset(struct sam_emac_s *priv); static void sam_emac_reset(struct sam_emac_s *priv); static void sam_macaddress(struct sam_emac_s *priv); static int sam_emac_configure(struct sam_emac_s *priv); /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Name: sam_checkreg * * Description: * Check if the current register access is a duplicate of the preceding. * * Input Parameters: * regval - The value to be written * address - The address of the register to write to * * Returned Value: * true: This is the first register access of this type. * flase: This is the same as the preceding register access. * ****************************************************************************/ #ifdef CONFIG_SAMA5_EMACA_REGDEBUG static bool sam_checkreg(struct sam_emac_s *priv, bool wr, uint32_t regval, uintptr_t address) { if (wr == priv->wrlast && /* Same kind of access? */ regval == priv->vallast && /* Same value? */ address == priv->addrlast) /* Same address? */ { /* Yes, then just keep a count of the number of times we did this. */ priv->ntimes++; return false; } else { /* Did we do the previous operation more than once? */ if (priv->ntimes > 0) { /* Yes... show how many times we did it */ lldbg("...[Repeats %d times]...\n", priv->ntimes); } /* Save information about the new access */ priv->wrlast = wr; priv->vallast = regval; priv->addrlast = address; priv->ntimes = 0; } /* Return true if this is the first time that we have done this operation */ return true; } #endif /**************************************************************************** * Name: sam_getreg * * Description: * Read any 32-bit register using an absolute * ****************************************************************************/ #ifdef CONFIG_SAMA5_EMACA_REGDEBUG static uint32_t sam_getreg(struct sam_emac_s *priv, uintptr_t address) { uint32_t regval = getreg32(address); if (sam_checkreg(priv, false, regval, address)) { lldbg("%08x->%08x\n", address, regval); } return regval; } #endif /**************************************************************************** * Name: sam_putreg * * Description: * Write to any 32-bit register using an absolute address * ****************************************************************************/ #ifdef CONFIG_SAMA5_EMACA_REGDEBUG static void sam_putreg(struct sam_emac_s *priv, uintptr_t address, uint32_t regval) { if (sam_checkreg(priv, true, regval, address)) { lldbg("%08x<-%08x\n", address, regval); } putreg32(regval, address); } #endif /**************************************************************************** * Function: sam_txinuse * * Description: * Return the number of TX buffers in-use * * Input Parameters: * priv - The EMAC driver state * * Returned Value: * The number of TX buffers in-use * ****************************************************************************/ static uint16_t sam_txinuse(struct sam_emac_s *priv) { uint32_t txhead32 = (uint32_t)priv->txhead; if ((uint32_t)priv->txtail > txhead32) { return txhead32 += CONFIG_SAMA5_EMAC_NTXBUFFERS; } return (uint16_t)(txhead32 - (uint32_t)priv->txtail); } /**************************************************************************** * Function: sam_txfree * * Description: * Return the number of TX buffers available * * Input Parameters: * priv - The EMAC driver state * * Returned Value: * The number of TX buffers available * ****************************************************************************/ static uint16_t sam_txfree(struct sam_emac_s *priv) { /* The number available is equal to the total number of buffers, minus the * number of buffers in use. Notice that that actual number of buffers is * the configured size minus 1. */ return (CONFIG_SAMA5_EMAC_NTXBUFFERS-1) - sam_txinuse(priv); } /**************************************************************************** * Function: sam_buffer_initialize * * Description: * Allocate aligned TX and RX descriptors and buffers. For the case of * pre-allocated structures, the function degenerates to a few assignements. * * Input Parameters: * priv - The EMAC driver state * * Returned Value: * OK on success; Negated errno on failure. * * Assumptions: * Called very early in the initialization sequence. * ****************************************************************************/ static int sam_buffer_initialize(struct sam_emac_s *priv) { #ifdef CONFIG_SAMA5_EMACA_PREALLOCATE /* Use pre-allocated buffers */ priv->txdesc = g_txdesc; priv->rxdesc = g_rxdesc; priv->txbuffer = g_txbuffer; priv->rxbuffer = g_rxbuffer; #else size_t allocsize; /* Allocate buffers */ allocsize = CONFIG_SAMA5_EMAC_NTXBUFFERS * sizeof(struct emac_txdesc_s); priv->txdesc = (struct emac_txdesc_s *)kmemalign(8, allocsize); if (!priv->txdesc) { nlldbg("ERROR: Failed to allocate TX descriptors\n"); return -ENOMEM; } memset(priv->txdesc, 0, allocsize); allocsize = CONFIG_SAMA5_EMAC_NRXBUFFERS * sizeof(struct emac_rxdesc_s); priv->rxdesc = (struct emac_rxdesc_s *)kmemalign(8, allocsize); if (!priv->rxdesc) { nlldbg("ERROR: Failed to allocate RX descriptors\n"); sam_buffer_free(priv); return -ENOMEM; } memset(priv->rxdesc, 0, allocsize); allocsize = CONFIG_SAMA5_EMAC_NTXBUFFERS * EMAC_TX_UNITSIZE; priv->txbuffer = (uint8_t *)kmemalign(8, allocsize); if (!priv->txbuffer) { nlldbg("ERROR: Failed to allocate TX buffer\n"); sam_buffer_free(priv); return -ENOMEM; } allocsize = CONFIG_SAMA5_EMAC_NRXBUFFERS * EMAC_RX_UNITSIZE; priv->rxbuffer = (uint8_t *)kmemalign(8, allocsize); if (!priv->rxbuffer) { nlldbg("ERROR: Failed to allocate RX buffer\n"); sam_buffer_free(priv); return -ENOMEM; } #endif DEBUGASSERT(((uintptr_t)priv->rxdesc & 7) == 0 && ((uintptr_t)priv->rxbuffer & 7) == 0 && ((uintptr_t)priv->txdesc & 7) == 0 && ((uintptr_t)priv->txbuffer & 7) == 0); return OK; } /**************************************************************************** * Function: sam_buffer_free * * Description: * Free aligned TX and RX descriptors and buffers. For the case of * pre-allocated structures, the function does nothing. * * Input Parameters: * priv - The EMAC driver state * * Returned Value: * None * ****************************************************************************/ static void sam_buffer_free(struct sam_emac_s *priv) { #ifndef CONFIG_SAMA5_EMACA_PREALLOCATE /* Free allocated buffers */ if (priv->txdesc) { kfree(priv->txdesc); priv->txdesc = NULL; } if (priv->rxdesc) { kfree(priv->rxdesc); priv->rxdesc = NULL; } if (priv->txbuffer) { kfree(priv->txbuffer); priv->txbuffer = NULL; } if (priv->rxbuffer) { kfree(priv->rxbuffer); priv->rxbuffer = NULL; } #endif } /**************************************************************************** * Function: sam_transmit * * Description: * Start hardware transmission. Called either from the txdone interrupt * handling or from watchdog based polling. * * Parameters: * priv - Reference to the driver state structure * * Returned Value: * OK on success; a negated errno on failure * * Assumptions: * May or may not be called from an interrupt handler. In either case, * global interrupts are disabled, either explicitly or indirectly through * interrupt handling logic. * ****************************************************************************/ static int sam_transmit(struct sam_emac_s *priv) { struct uip_driver_s *dev = &priv->dev; volatile struct emac_txdesc_s *txdesc; uintptr_t virtaddr; uint32_t regval; uint32_t status; nllvdbg("d_len: %d txhead: %d\n", dev->d_len, priv->txhead); sam_dumppacket("Transmit packet", dev->d_buf, dev->d_len); /* Check parameter */ if (dev->d_len > EMAC_TX_UNITSIZE) { nlldbg("ERROR: Packet too big: %d\n", dev->d_len); return -EINVAL; } /* Pointer to the current TX descriptor */ txdesc = &priv->txdesc[priv->txhead]; /* If no free TX descriptor, buffer can't be sent */ if (sam_txfree(priv) < 1) { nlldbg("ERROR: No free TX descriptors\n"); return -EBUSY; } /* Setup/Copy data to transmission buffer */ if (dev->d_len > 0) { /* Driver managed the ring buffer */ virtaddr = sam_virtramaddr(txdesc->addr); memcpy((void *)virtaddr, dev->d_buf, dev->d_len); cp15_clean_dcache((uint32_t)virtaddr, (uint32_t)virtaddr + dev->d_len); } /* Update TX descriptor status. */ status = dev->d_len | EMACTXD_STA_LAST; if (priv->txhead == CONFIG_SAMA5_EMAC_NTXBUFFERS-1) { status |= EMACTXD_STA_WRAP; } /* Update the descriptor status and flush the updated value to RAM */ txdesc->status = status; cp15_clean_dcache((uint32_t)txdesc, (uint32_t)txdesc + sizeof(struct emac_txdesc_s)); /* Increment the head index */ if (++priv->txhead >= CONFIG_SAMA5_EMAC_NTXBUFFERS) { priv->txhead = 0; } /* Now start transmission (if it is not already done) */ regval = sam_getreg(priv, SAM_EMAC_NCR); regval |= EMAC_NCR_TSTART; sam_putreg(priv, SAM_EMAC_NCR, regval); /* Setup the TX timeout watchdog (perhaps restarting the timer) */ (void)wd_start(priv->txtimeout, SAM_TXTIMEOUT, sam_txtimeout, 1, (uint32_t)priv); /* Set d_len to zero meaning that the d_buf[] packet buffer is again * available. */ dev->d_len = 0; /* If we have no more available TX descriptors, then we must disable the * RCOMP interrupt to stop further RX processing. Why? Because EACH RX * packet that is dispatch is also an opportunity to replay with the a TX * packet. So, if we cannot handle an RX packet replay, then we disable * all RX packet processing. */ if (sam_txfree(priv) < 1) { nllvdbg("Disabling RX interrupts\n"); sam_putreg(priv, SAM_EMAC_IDR, EMAC_INT_RCOMP); } return OK; } /**************************************************************************** * Function: sam_uiptxpoll * * Description: * The transmitter is available, check if uIP has any outgoing packets ready * to send. This is a callback from uip_poll(). uip_poll() may be called: * * 1. When the preceding TX packet send is complete, * 2. When the preceding TX packet send timesout and the interface is reset * 3. During normal TX polling * * Parameters: * dev - Reference to the NuttX driver state structure * * Returned Value: * OK on success; a negated errno on failure * * Assumptions: * May or may not be called from an interrupt handler. In either case, * global interrupts are disabled, either explicitly or indirectly through * interrupt handling logic. * ****************************************************************************/ static int sam_uiptxpoll(struct uip_driver_s *dev) { struct sam_emac_s *priv = (struct sam_emac_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->dev.d_len > 0) { /* Send the packet */ arp_out(&priv->dev); sam_transmit(priv); /* Check if the there are any free TX descriptors. We cannot perform * the TX poll if we do not have buffering for another packet. */ if (sam_txfree(priv) == 0) { /* We have to terminate the poll if we have no more descriptors * available for another transfer. */ return -EBUSY; } } /* If zero is returned, the polling will continue until all connections have * been examined. */ return 0; } /**************************************************************************** * Function: sam_dopoll * * Description: * Perform the uIP poll. * * Parameters: * priv - Reference to the driver state structure * * Returned Value: * None * * Assumptions: * Global interrupts are disabled by interrupt handling logic. * ****************************************************************************/ static void sam_dopoll(struct sam_emac_s *priv) { struct uip_driver_s *dev = &priv->dev; /* Check if the there are any free TX descriptors. We cannot perform the * TX poll if we do not have buffering for another packet. */ if (sam_txfree(priv) > 0) { /* If we have the descriptor, then poll uIP for new XMIT data. */ (void)uip_poll(dev, sam_uiptxpoll); } } /**************************************************************************** * Function: sam_recvframe * * Description: * The function is called when a frame is received. It scans the RX * descriptors of the received frame and assembles the full packet/ * * NOTE: This function will silently discard any packets containing errors. * * Parameters: * priv - Reference to the driver state structure * * Returned Value: * OK if a packet was successfully returned; -EAGAIN if there are no * further packets available * * Assumptions: * - Global interrupts are disabled by interrupt handling logic. * - The RX descriptor D-cache list has been invalided to force fetching * from RAM. * ****************************************************************************/ static int sam_recvframe(struct sam_emac_s *priv) { struct emac_rxdesc_s *rxdesc; struct uip_driver_s *dev; const uint8_t *src; uint8_t *dest; uintptr_t physaddr; uint32_t rxndx; uint32_t pktlen; uint16_t copylen; bool isframe; /* Process received RX descriptor. The ownership bit is set by the EMAC * once it has successfully written a frame to memory. */ dev = &priv->dev; dev->d_len = 0; rxndx = priv->rxndx; rxdesc = &priv->rxdesc[rxndx]; isframe = false; /* Invalidate the RX descriptor to force re-fetching from RAM */ cp15_invalidate_dcache((uintptr_t)rxdesc, (uintptr_t)rxdesc + sizeof(struct emac_rxdesc_s)); nllvdbg("rxndx: %d\n", rxndx); while ((rxdesc->addr & EMACRXD_ADDR_OWNER) != 0) { /* The start of frame bit indicates the beginning of a frame. Discard * any previous fragments. */ if ((rxdesc->status & EMACRXD_STA_SOF) != 0) { /* Skip previous fragments */ while (rxndx != priv->rxndx) { /* Give ownership back to the EMAC */ rxdesc = &priv->rxdesc[priv->rxndx]; rxdesc->addr &= ~(EMACRXD_ADDR_OWNER); /* Flush the modified RX descriptor to RAM */ cp15_clean_dcache((uintptr_t)rxdesc, (uintptr_t)rxdesc + sizeof(struct emac_rxdesc_s)); /* Increment the RX index */ if (++priv->rxndx >= CONFIG_SAMA5_EMAC_NRXBUFFERS) { priv->rxndx = 0; } } /* Reset the packet data pointer and packet length */ dest = dev->d_buf; pktlen = 0; /* Start to gather buffers into the packet buffer */ isframe = true; } /* Increment the working index */ if (++rxndx >= CONFIG_SAMA5_EMAC_NRXBUFFERS) { rxndx = 0; } /* Copy data into the packet buffer */ if (isframe) { if (rxndx == priv->rxndx) { nllvdbg("ERROR: No EOF (Invalid of buffers too small)\n"); do { /* Give ownership back to the EMAC */ rxdesc = &priv->rxdesc[priv->rxndx]; rxdesc->addr &= ~(EMACRXD_ADDR_OWNER); /* Flush the modified RX descriptor to RAM */ cp15_clean_dcache((uintptr_t)rxdesc, (uintptr_t)rxdesc + sizeof(struct emac_rxdesc_s)); /* Increment the RX index */ if (++priv->rxndx >= CONFIG_SAMA5_EMAC_NRXBUFFERS) { priv->rxndx = 0; } } while (rxndx != priv->rxndx); return -EIO; } /* Get the number of bytes to copy from the buffer */ copylen = EMAC_RX_UNITSIZE; if ((pktlen + copylen) > CONFIG_NET_BUFSIZE) { copylen = CONFIG_NET_BUFSIZE - pktlen; } /* Get the data source. Invalidate the source memory region to * force reload from RAM. */ physaddr = (uintptr_t)(rxdesc->addr & EMACRXD_ADDR_MASK); src = (const uint8_t *)sam_virtramaddr(physaddr); cp15_invalidate_dcache((uintptr_t)src, (uintptr_t)src + copylen); /* And do the copy */ memcpy(dest, src, copylen); dest += copylen; pktlen += copylen; /* If the end of frame has been received, return the data */ if ((rxdesc->status & EMACRXD_STA_EOF) != 0) { /* Frame size from the EMAC */ dev->d_len = (rxdesc->status & EMACRXD_STA_FRLEN_MASK); nllvdbg("packet %d-%d (%d)\n", priv->rxndx, rxndx, dev->d_len); /* All data have been copied in the application frame buffer, * release the RX descriptor */ while (priv->rxndx != rxndx) { /* Give ownership back to the EMAC */ rxdesc = &priv->rxdesc[priv->rxndx]; rxdesc->addr &= ~(EMACRXD_ADDR_OWNER); /* Flush the modified RX descriptor to RAM */ cp15_clean_dcache((uintptr_t)rxdesc, (uintptr_t)rxdesc + sizeof(struct emac_rxdesc_s)); /* Increment the RX index */ if (++priv->rxndx >= CONFIG_SAMA5_EMAC_NRXBUFFERS) { priv->rxndx = 0; } } /* Check if the device packet buffer was large enough to accept * all of the data. */ nllvdbg("rxndx: %d d_len: %d\n", priv->rxndx, dev->d_len); if (pktlen < dev->d_len) { nlldbg("ERROR: Buffer size %d; frame size %d\n", dev->d_len, pktlen); return -E2BIG; } return OK; } } /* We have not encountered the SOF yet... discard this fragment and * keep looking */ else { /* Give ownership back to the EMAC */ rxdesc->addr &= ~(EMACRXD_ADDR_OWNER); /* Flush the modified RX descriptor to RAM */ cp15_clean_dcache((uintptr_t)rxdesc, (uintptr_t)rxdesc + sizeof(struct emac_rxdesc_s)); priv->rxndx = rxndx; } /* Process the next buffer */ rxdesc = &priv->rxdesc[rxndx]; /* Invalidate the RX descriptor to force re-fetching from RAM */ cp15_invalidate_dcache((uintptr_t)rxdesc, (uintptr_t)rxdesc + sizeof(struct emac_rxdesc_s)); } /* No packet was found */ priv->rxndx = rxndx; nllvdbg("rxndx: %d\n", priv->rxndx); return -EAGAIN; } /**************************************************************************** * Function: sam_receive * * Description: * An interrupt was received indicating the availability of a new RX packet * in FIFO memory. * * Parameters: * priv - Reference to the driver state structure * * Returned Value: * None * * Assumptions: * Global interrupts are disabled by interrupt handling logic. * ****************************************************************************/ static void sam_receive(struct sam_emac_s *priv) { struct uip_driver_s *dev = &priv->dev; /* Loop while while sam_recvframe() successfully retrieves valid * EMAC frames. */ while (sam_recvframe(priv) == OK) { sam_dumppacket("Received packet", dev->d_buf, dev->d_len); /* Check if the packet is a valid size for the uIP buffer configuration * (this should not happen) */ if (dev->d_len > CONFIG_NET_BUFSIZE) { nlldbg("DROPPED: Too big: %d\n", dev->d_len); } /* We only accept IP packets of the configured type and ARP packets */ #ifdef CONFIG_NET_IPv6 else if (BUF->type == HTONS(UIP_ETHTYPE_IP6)) #else else if (BUF->type == HTONS(UIP_ETHTYPE_IP)) #endif { nllvdbg("IP frame\n"); /* Handle ARP on input then give the IP packet to uIP */ arp_ipin(&priv->dev); uip_input(&priv->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->dev.d_len > 0) { arp_out(&priv->dev); sam_transmit(priv); } } else if (BUF->type == htons(UIP_ETHTYPE_ARP)) { nllvdbg("ARP frame\n"); /* Handle ARP packet */ arp_arpin(&priv->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->dev.d_len > 0) { sam_transmit(priv); } } else { nlldbg("DROPPED: Unknown type: %04x\n", BUF->type); } } } /**************************************************************************** * Function: sam_txdone * * Description: * An interrupt was received indicating that a frame has completed * transmission. * * Parameters: * priv - Reference to the driver state structure * * Returned Value: * None * * Assumptions: * Global interrupts are disabled by the watchdog logic. * ****************************************************************************/ static void sam_txdone(struct sam_emac_s *priv) { struct emac_txdesc_s *txdesc; /* Are there any outstanding transmissions? Loop until either (1) all of * the TX have been examined, or (2) until we encounter the first * descriptor that is still in use by the hardware. */ while (priv->txhead != priv->txtail) { /* Yes.. check the next buffer at the tail of the list */ txdesc = &priv->txdesc[priv->txtail]; cp15_invalidate_dcache((uintptr_t)txdesc, (uintptr_t)txdesc + sizeof(struct emac_txdesc_s)); /* Is this TX descriptor still in use? */ if ((txdesc->status & EMACTXD_STA_USED) == 0) { /* Yes.. the descriptor is still in use. However, I have seen a * case (only repeatable on start-up) where the USED bit is never * set. Yikes! If we have encountered the first still busy * descriptor, then we should also have TQBD equal to the descriptor * address. If it is not, then treat is as used anyway. */ #if 0 /* The issue does not exist in the current configuration, but may return */ #warning REVISIT if (priv->txtail == 0 && sam_physramaddr((uintptr_t)txdesc) != sam_getreg(priv, SAM_EMAC_TBQP)) { txdesc->status = (uint32_t)EMACTXD_STA_USED; cp15_clean_dcache((uintptr_t)txdesc, (uintptr_t)txdesc + sizeof(struct emac_txdesc_s)); } else #endif { /* Otherwise, the descriptor is truly in use. Break out of the * loop now. */ break; } } /* Increment the tail index */ if (++priv->txtail >= CONFIG_SAMA5_EMAC_NTXBUFFERS) { /* Wrap to the beginning of the TX descriptor list */ priv->txtail = 0; } /* At least one TX descriptor is available. Re-enable RX interrupts. * RX interrupts may previously have been disabled when we ran out of * TX desciptors (see commits in sam_transmit()). */ sam_putreg(priv, SAM_EMAC_IER, EMAC_INT_RCOMP); } /* Then poll uIP for new XMIT data */ sam_dopoll(priv); } /**************************************************************************** * Function: sam_emac_interrupt * * Description: * Hardware interrupt handler * * 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 sam_emac_interrupt(int irq, void *context) { struct sam_emac_s *priv = &g_emac; uint32_t isr; uint32_t rsr; uint32_t tsr; uint32_t imr; uint32_t regval; uint32_t pending; uint32_t clrbits; isr = sam_getreg(priv, SAM_EMAC_ISR); rsr = sam_getreg(priv, SAM_EMAC_RSR); tsr = sam_getreg(priv, SAM_EMAC_TSR); imr = sam_getreg(priv, SAM_EMAC_IMR); pending = isr & ~(imr | EMAC_INT_UNUSED); nllvdbg("isr: %08x pending: %08x\n", isr, pending); /* Check for the completion of a transmission. This should be done before * checking for received data (because receiving can cause another transmission * before we had a chance to handle the last one). * * ISR:TCOMP is set when a frame has been transmitted. Cleared on read. * TSR:COMP is set when a frame has been transmitted. Cleared by writing a * one to this bit. */ if ((pending & EMAC_INT_TCOMP) != 0 || (tsr & EMAC_TSR_COMP) != 0) { /* A frame has been transmitted */ clrbits = EMAC_TSR_COMP; /* Check for Retry Limit Exceeded (RLE) */ if ((tsr & EMAC_TSR_RLES) != 0) { /* Status RLE & Number of discarded buffers */ clrbits = EMAC_TSR_RLES | sam_txinuse(priv); sam_txreset(priv); nlldbg("ERROR: Retry Limit Exceeded TSR: %08x\n", tsr); regval = sam_getreg(priv, SAM_EMAC_NCR); regval |= EMAC_NCR_TE; sam_putreg(priv, SAM_EMAC_NCR, regval); } /* Check Collision Occurred (COL) */ if ((tsr & EMAC_TSR_COL) != 0) { nlldbg("ERROR: Collision occurred TSR: %08x\n", tsr); clrbits |= EMAC_TSR_COL; } /* Check Buffers exhausted mid frame (BEX) */ if ((tsr & EMAC_TSR_BEX) != 0) { nlldbg("ERROR: Buffers exhausted mid-frame TSR: %08x\n", tsr); clrbits |= EMAC_TSR_BEX; } /* Check for Transmit Underrun (UND) * * ISR:UND is set transmit DMA was not able to read data from memory, * either because the bus was not granted in time, because a not * OK hresp(bus error) was returned or because a used bit was read * midway through frame transmission. If this occurs, the * transmitter forces bad CRC. Cleared by writing a one to this bit. */ if ((tsr & EMAC_TSR_UND) != 0) { nlldbg("ERROR: Transmit Underrun TSR: %08x\n", tsr); clrbits |= EMAC_TSR_UND; } /* Clear status */ sam_putreg(priv, SAM_EMAC_TSR, clrbits); /* And handle the TX done event */ sam_txdone(priv); } /* Check for the receipt of an RX packet. * * RXCOMP indicates that a packet has been received and stored in memory. * The RXCOMP bit is cleared whent he interrupt status register was read. * RSR:REC indicates that one or more frames have been received and placed * in memory. This indication is cleared by writing a one to this bit. */ if ((pending & EMAC_INT_RCOMP) != 0 || (rsr & EMAC_RSR_REC) != 0) { clrbits = EMAC_RSR_REC; /* Check for Receive Overrun. * * RSR:RXOVR will be set if the RX FIFO is not able to store the * receive frame due to a FIFO overflow, or if the receive status * was not taken at the end of the frame. This bit is also set in * DMA packet buffer mode if the packet buffer overflows. For DMA * operation, the buffer will be recovered if an overrun occurs. This * bit is cleared when set to 1. */ if ((rsr & EMAC_RSR_OVR) != 0) { nlldbg("ERROR: Receiver overrun RSR: %08x\n", rsr); clrbits |= EMAC_RSR_OVR; } /* Check for buffer not available (BNA) * * RSR:BNA means that an attempt was made to get a new buffer and the * pointer indicated that it was owned by the processor. The DMA will * reread the pointer each time an end of frame is received until a * valid pointer is found. This bit is set following each descriptor * read attempt that fails, even if consecutive pointers are * unsuccessful and software has in the mean time cleared the status * flag. Cleared by writing a one to this bit. */ if ((rsr & EMAC_RSR_BNA) != 0) { nlldbg("ERROR: Buffer not available RSR: %08x\n", rsr); clrbits |= EMAC_RSR_BNA; } /* Clear status */ sam_putreg(priv, SAM_EMAC_RSR, clrbits); /* Handle the received packet */ sam_receive(priv); } #ifdef CONFIG_DEBUG_NET /* Check for PAUSE Frame recieved (PFRE). * * ISR:PFRE indicates that a pause frame has been received. Cleared on a read. */ if ((pending & EMAC_INT_PFR) != 0) { nlldbg("Pause frame received\n"); } /* Check for Pause Time Zero (PTZ) * * ISR:PTZ is set Pause Time Zero */ if ((pending & EMAC_INT_PTZ) != 0) { nlldbg("Pause TO!\n"); } #endif return OK; } /**************************************************************************** * Function: sam_txtimeout * * Description: * Our TX watchdog timed out. Called from the timer interrupt handler. * The last TX never completed. Reset the hardware and start again. * * Parameters: * argc - The number of available arguments * arg - The first argument * * Returned Value: * None * * Assumptions: * Global interrupts are disabled by the watchdog logic. * ****************************************************************************/ static void sam_txtimeout(int argc, uint32_t arg, ...) { struct sam_emac_s *priv = (struct sam_emac_s *)arg; nlldbg("Timeout!\n"); /* Then reset the hardware. Just take the interface down, then back * up again. */ sam_ifdown(&priv->dev); sam_ifup(&priv->dev); /* Then poll uIP for new XMIT data */ sam_dopoll(priv); } /**************************************************************************** * Function: sam_polltimer * * Description: * Periodic timer handler. Called from the timer interrupt handler. * * Parameters: * argc - The number of available arguments * arg - The first argument * * Returned Value: * None * * Assumptions: * Global interrupts are disabled by the watchdog logic. * ****************************************************************************/ static void sam_polltimer(int argc, uint32_t arg, ...) { struct sam_emac_s *priv = (struct sam_emac_s *)arg; struct uip_driver_s *dev = &priv->dev; /* Check if the there are any free TX descriptors. We cannot perform the * TX poll if we do not have buffering for another packet. */ if (sam_txfree(priv) > 0) { /* Update TCP timing states and poll uIP for new XMIT data. */ (void)uip_timer(dev, sam_uiptxpoll, SAM_POLLHSEC); } /* Setup the watchdog poll timer again */ (void)wd_start(priv->txpoll, SAM_WDDELAY, sam_polltimer, 1, arg); } /**************************************************************************** * Function: sam_ifup * * Description: * NuttX Callback: Bring up the EMAC interface when an IP address is * provided * * Parameters: * dev - Reference to the NuttX driver state structure * * Returned Value: * None * * Assumptions: * ****************************************************************************/ static int sam_ifup(struct uip_driver_s *dev) { struct sam_emac_s *priv = (struct sam_emac_s *)dev->d_private; int ret; nlldbg("Bringing up: %d.%d.%d.%d\n", dev->d_ipaddr & 0xff, (dev->d_ipaddr >> 8) & 0xff, (dev->d_ipaddr >> 16) & 0xff, dev->d_ipaddr >> 24); /* Configure the EMAC interface for normal operation. */ nllvdbg("Initialize the EMAC\n"); sam_emac_configure(priv); /* Set the MAC address (should have been configured while we were down) */ sam_macaddress(priv); /* Initialize for PHY access */ ret = sam_phyinit(priv); if (ret < 0) { nlldbg("ERROR: sam_phyinit failed: %d\n", ret); return ret; } /* Auto Negotiate, working in RMII mode */ ret = sam_autonegotiate(priv); if (ret < 0) { nlldbg("ERROR: sam_autonegotiate failed: %d\n", ret); return ret; } while (sam_linkup(priv) == 0); nllvdbg("Link detected \n"); /* Enable normal MAC operation */ nllvdbg("Enable normal operation\n"); /* Set and activate a timer process */ (void)wd_start(priv->txpoll, SAM_WDDELAY, sam_polltimer, 1, (uint32_t)priv); /* Enable the EMAC interrupt */ priv->ifup = true; up_enable_irq(SAM_IRQ_EMAC); return OK; } /**************************************************************************** * Function: sam_ifdown * * Description: * NuttX Callback: Stop the interface. * * Parameters: * dev - Reference to the NuttX driver state structure * * Returned Value: * None * * Assumptions: * ****************************************************************************/ static int sam_ifdown(struct uip_driver_s *dev) { struct sam_emac_s *priv = (struct sam_emac_s *)dev->d_private; irqstate_t flags; nlldbg("Taking the network down\n"); /* Disable the EMAC interrupt */ flags = irqsave(); up_disable_irq(SAM_IRQ_EMAC); /* Cancel the TX poll timer and TX timeout timers */ wd_cancel(priv->txpoll); wd_cancel(priv->txtimeout); /* Put the EMAC in its reset, non-operational state. This should be * a known configuration that will guarantee the sam_ifup() always * successfully brings the interface back up. */ sam_emac_reset(priv); /* Mark the device "down" */ priv->ifup = false; irqrestore(flags); return OK; } /**************************************************************************** * Function: sam_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. * * Parameters: * dev - Reference to the NuttX driver state structure * * Returned Value: * None * * Assumptions: * Called in normal user mode * ****************************************************************************/ static int sam_txavail(struct uip_driver_s *dev) { struct sam_emac_s *priv = (struct sam_emac_s *)dev->d_private; irqstate_t flags; nllvdbg("ifup: %d\n", priv->ifup); /* Disable interrupts because this function may be called from interrupt * level processing. */ flags = irqsave(); /* Ignore the notification if the interface is not yet up */ if (priv->ifup) { /* Poll uIP for new XMIT data */ sam_dopoll(priv); } irqrestore(flags); return OK; } /**************************************************************************** * Function: sam_addmac * * Description: * NuttX Callback: Add the specified MAC address to the hardware multicast * address filtering * * Parameters: * dev - Reference to the NuttX driver state structure * mac - The MAC address to be added * * Returned Value: * None * * Assumptions: * ****************************************************************************/ #ifdef CONFIG_NET_IGMP static int sam_addmac(struct uip_driver_s *dev, const uint8_t *mac) { struct sam_emac_s *priv = (struct sam_emac_s *)dev->d_private; nllvdbg("MAC: %02x:%02x:%02x:%02x:%02x:%02x\n", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]); /* Add the MAC address to the hardware multicast routing table */ /* Add the MAC address to the hardware multicast routing table */ #error "Missing logic" return OK; } #endif /**************************************************************************** * Function: sam_rmmac * * Description: * NuttX Callback: Remove the specified MAC address from the hardware multicast * address filtering * * Parameters: * dev - Reference to the NuttX driver state structure * mac - The MAC address to be removed * * Returned Value: * None * * Assumptions: * ****************************************************************************/ #ifdef CONFIG_NET_IGMP static int sam_rmmac(struct uip_driver_s *dev, const uint8_t *mac) { struct sam_emac_s *priv = (struct sam_emac_s *)dev->d_private; nllvdbg("MAC: %02x:%02x:%02x:%02x:%02x:%02x\n", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]); /* Add the MAC address to the hardware multicast routing table */ #error "Missing logic" return OK; } #endif /**************************************************************************** * Function: sam_phydump * * Description: * Dump the contents of PHY registers * * Parameters: * priv - A reference to the private driver state structure * * Returned Value: * None * ****************************************************************************/ #if defined(CONFIG_DEBUG_NET) && defined(CONFIG_DEBUG_VERBOSE) static void sam_phydump(struct sam_emac_s *priv) { uint32_t regval; uint16_t phyval; /* Enable management port */ regval = sam_getreg(priv, SAM_EMAC_NCR); regval |= EMAC_NCR_MPE; sam_putreg(priv, SAM_EMAC_NCR, regval); #ifdef CONFIG_SAMA5_EMAC_RMII nllvdbg("RMII Registers (Address %02x)\n", priv->phyaddr); #else /* defined(CONFIG_SAMA5_EMAC_MII) */ nllvdbg("MII Registers (Address %02x)\n", priv->phyaddr); #endif sam_phyread(priv, priv->phyaddr, MII_MCR, &phyval); nllvdbg(" MCR: %04x\n", phyval); sam_phyread(priv, priv->phyaddr, MII_MSR, &phyval); nllvdbg(" MSR: %04x\n", phyval); sam_phyread(priv, priv->phyaddr, MII_ADVERTISE, &phyval); nllvdbg(" ADVERTISE: %04x\n", phyval); sam_phyread(priv, priv->phyaddr, MII_LPA, &phyval); nllvdbg(" LPR: %04x\n", phyval); sam_phyread(priv, priv->phyaddr, CONFIG_SAMA5_EMAC_PHYSR, &phyval); nllvdbg(" PHYSR: %04x\n", phyval); /* Disable management port */ regval = sam_getreg(priv, SAM_EMAC_NCR); regval &= ~EMAC_NCR_MPE; sam_putreg(priv, SAM_EMAC_NCR, regval); } #endif /**************************************************************************** * Function: sam_phywait * * Description: * Wait for the PHY to become IDLE * * Parameters: * priv - A reference to the private driver state structure * * Returned Value: * OK on success; Negated errno (-ETIMEDOUT) on failure. * ****************************************************************************/ static int sam_phywait(struct sam_emac_s *priv) { volatile unsigned int retries; /* Loop for the configured number of attempts */ for (retries = 0; retries < PHY_RETRY_MAX; retries++) { /* Is the PHY IDLE */ if ((sam_getreg(priv, SAM_EMAC_NSR) & EMAC_NSR_IDLE) != 0) { return OK; } } return -ETIMEDOUT; } /**************************************************************************** * Function: sam_phyreset * * Description: * Reset the PHY * * Parameters: * priv - A reference to the private driver state structure * * Returned Value: * OK on success; Negated errno on failure. * * Assumptions: * ****************************************************************************/ static int sam_phyreset(struct sam_emac_s *priv) { uint32_t regval; uint16_t mcr; int timeout; int ret; nllvdbg(" sam_phyreset\n"); /* Enable management port */ regval = sam_getreg(priv, SAM_EMAC_NCR); regval |= EMAC_NCR_MPE; sam_putreg(priv, SAM_EMAC_NCR, regval); /* Reset the PHY */ ret = sam_phywrite(priv, priv->phyaddr, MII_MCR, MII_MCR_RESET); if (ret < 0) { nlldbg("ERROR: sam_phywrite failed: %d\n", ret); } /* Wait for the PHY reset to complete */ ret = -ETIMEDOUT; for (timeout = 0; timeout < 10; timeout++) { mcr = MII_MCR_RESET; int result = sam_phyread(priv, priv->phyaddr, MII_MCR, &mcr); if (result < 0) { nlldbg("ERROR: Failed to read the MCR register: %d\n", ret); ret = result; } else if ((mcr & MII_MCR_RESET) == 0) { ret = OK; break; } } /* Disable management port */ regval = sam_getreg(priv, SAM_EMAC_NCR); regval &= ~EMAC_NCR_MPE; sam_putreg(priv, SAM_EMAC_NCR, regval); return ret; } /**************************************************************************** * Function: sam_phyfind * * Description: * Verify the PHY address and, if it is bad, try to one that works. * * Parameters: * priv - A reference to the private driver state structure * * Returned Value: * OK on success; Negated errno on failure. * * Assumptions: * ****************************************************************************/ static int sam_phyfind(struct sam_emac_s *priv, uint8_t *phyaddr) { uint32_t regval; uint16_t phyval; uint8_t candidate; unsigned int offset; int ret = -ESRCH; nllvdbg("Find a valid PHY address\n"); /* Enable management port */ regval = sam_getreg(priv, SAM_EMAC_NCR); regval |= EMAC_NCR_MPE; sam_putreg(priv, SAM_EMAC_NCR, regval); candidate = *phyaddr; /* Check current candidate address */ ret = sam_phyread(priv, candidate, MII_PHYID1, &phyval); if (ret == OK && phyval == MII_OUI_MSB) { *phyaddr = candidate; ret = OK; } /* The current address does not work... try another */ else { nlldbg("ERROR: sam_phyread failed for PHY address %02x: %d\n", candidate, ret); for (offset = 0; offset < 32; offset++) { /* Get the next candidate PHY address */ candidate = (candidate + 1) & 0x1f; /* Try reading the PHY ID from the candidate PHY address */ ret = sam_phyread(priv, candidate, MII_PHYID1, &phyval); if (ret == OK && phyval == MII_OUI_MSB) { ret = OK; break; } } } if (ret == OK) { nllvdbg(" PHYID1: %04x PHY addr: %d\n", phyval, candidate); *phyaddr = candidate; sam_phyread(priv, candidate, CONFIG_SAMA5_EMAC_PHYSR, &phyval); nllvdbg(" PHYSR: %04x PHY addr: %d\n", phyval, candidate); } /* Disable management port */ regval = sam_getreg(priv, SAM_EMAC_NCR); regval &= ~EMAC_NCR_MPE; sam_putreg(priv, SAM_EMAC_NCR, regval); return ret; } /**************************************************************************** * Function: sam_phyread * * Description: * Read a PHY register. * * Parameters: * priv - A reference to the private driver state structure * phyaddr - The PHY device address * regaddr - The PHY register address * phyval - The location to return the 16-bit PHY register value. * * Returned Value: * OK on success; Negated errno on failure. * * Assumptions: * ****************************************************************************/ static int sam_phyread(struct sam_emac_s *priv, uint8_t phyaddr, uint8_t regaddr, uint16_t *phyval) { uint32_t regval; int ret; /* Make sure that the PHY is idle */ ret = sam_phywait(priv); if (ret < 0) { nlldbg("ERROR: sam_phywait failed: %d\n", ret); return ret; } /* Write the PHY Maintenance register */ regval = EMAC_MAN_DATA(0) | EMAC_MAN_CODE | EMAC_MAN_REGA(regaddr) | EMAC_MAN_PHYA(phyaddr) | EMAC_MAN_READ | EMAC_MAN_SOF; sam_putreg(priv, SAM_EMAC_MAN, regval); /* Wait until the PHY is again idle */ ret = sam_phywait(priv); if (ret < 0) { nlldbg("ERROR: sam_phywait failed: %d\n", ret); return ret; } /* Return data */ *phyval = (uint16_t)(sam_getreg(priv, SAM_EMAC_MAN) & EMAC_MAN_DATA_MASK); return OK; } /**************************************************************************** * Function: sam_phywrite * * Description: * Write to a PHY register. * * Parameters: * priv - A reference to the private driver state structure * phyaddr - The PHY device address * regaddr - The PHY register address * phyval - The 16-bit value to write to the PHY register. * * Returned Value: * OK on success; Negated errno on failure. * * Assumptions: * ****************************************************************************/ static int sam_phywrite(struct sam_emac_s *priv, uint8_t phyaddr, uint8_t regaddr, uint16_t phyval) { uint32_t regval; int ret; /* Make sure that the PHY is idle */ ret = sam_phywait(priv); if (ret < 0) { nlldbg("ERROR: sam_phywait failed: %d\n", ret); return ret; } /* Write the PHY Maintenance register */ regval = EMAC_MAN_DATA(phyval) | EMAC_MAN_CODE | EMAC_MAN_REGA(regaddr) | EMAC_MAN_PHYA(phyaddr) | EMAC_MAN_WRITE| EMAC_MAN_SOF; sam_putreg(priv, SAM_EMAC_MAN, regval); /* Wait until the PHY is again IDLE */ ret = sam_phywait(priv); if (ret < 0) { nlldbg("ERROR: sam_phywait failed: %d\n", ret); return ret; } return OK; } /**************************************************************************** * Function: sam_autonegotiate * * Description: * Autonegotiate speed and duplex. * * Parameters: * priv - A reference to the private driver state structure * * Returned Value: * OK on success; Negated errno on failure. * ****************************************************************************/ static int sam_autonegotiate(struct sam_emac_s *priv) { uint32_t regval; uint16_t phyid1; uint16_t phyid2; uint16_t mcr; uint16_t msr; uint16_t advertise; uint16_t lpa; int timeout; int ret; /* Enable management port */ regval = sam_getreg(priv, SAM_EMAC_NCR); regval |= EMAC_NCR_MPE; sam_putreg(priv, SAM_EMAC_NCR, regval); /* Verify tht we can read the PHYID register */ ret = sam_phyread(priv, priv->phyaddr, MII_PHYID1, &phyid1); if (ret < 0) { nlldbg("ERROR: Failed to read PHYID1\n"); goto errout; } nllvdbg("PHYID1: %04x PHY address: %02x\n", phyid1, priv->phyaddr); ret = sam_phyread(priv, priv->phyaddr, MII_PHYID2, &phyid2); if (ret < 0) { nlldbg("ERROR: Failed to read PHYID2\n"); goto errout; } nllvdbg("PHYID2: %04x PHY address: %02x\n", phyid2, priv->phyaddr); if (phyid1 == MII_OUI_MSB && ((phyid2 & MII_PHYID2_OUI_MASK) >> MII_PHYID2_OUI_SHIFT) == MII_OUI_LSB) { nllvdbg(" Vendor Model Number: %04x\n", (phyid2 & MII_PHYID2_MODEL_MASK) >> MII_PHYID2_MODEL_SHIFT); nllvdbg(" Model Revision Number: %04x\n", (phyid2 & MII_PHYID2_REV_MASK) >> MII_PHYID2_REV_SHIFT); } else { nlldbg("ERROR: PHY not recognized\n"); } /* Setup control register */ ret = sam_phyread(priv, priv->phyaddr, MII_MCR, &mcr); if (ret < 0) { nlldbg("ERROR: Failed to read MCR\n"); goto errout; } mcr &= ~MII_MCR_ANENABLE; /* Remove autonegotiation enable */ mcr &= ~(MII_MCR_LOOPBACK | MII_MCR_PDOWN); mcr |= MII_MCR_ISOLATE; /* Electrically isolate PHY */ ret = sam_phywrite(priv, priv->phyaddr, MII_MCR, mcr); if (ret < 0) { nlldbg("ERROR: Failed to write MCR\n"); goto errout; } /* Set the Auto_negotiation Advertisement Register MII advertising for * Next page 100BaseTxFD and HD, 10BaseTFD and HD, IEEE 802.3 */ advertise = MII_ADVERTISE_100BASETXFULL | MII_ADVERTISE_100BASETXHALF | MII_ADVERTISE_10BASETXFULL | MII_ADVERTISE_10BASETXHALF | MII_ADVERTISE_8023; ret = sam_phywrite(priv, priv->phyaddr, MII_ADVERTISE, advertise); if (ret < 0) { nlldbg("ERROR: Failed to write ANAR\n"); goto errout; } /* Read and modify control register */ ret = sam_phyread(priv, priv->phyaddr, MII_MCR, &mcr); if (ret < 0) { nlldbg("ERROR: Failed to read MCR\n"); goto errout; } mcr |= (MII_MCR_SPEED100 | MII_MCR_ANENABLE | MII_MCR_FULLDPLX); ret = sam_phywrite(priv, priv->phyaddr, MII_MCR, mcr); if (ret < 0) { nlldbg("ERROR: Failed to write MCR\n"); goto errout; } /* Restart Auto_negotiation */ mcr |= MII_MCR_ANRESTART; mcr &= ~MII_MCR_ISOLATE; ret = sam_phywrite(priv, priv->phyaddr, MII_MCR, mcr); if (ret < 0) { nlldbg("ERROR: Failed to write MCR\n"); goto errout; } nllvdbg(" MCR: %04x\n", mcr); /* Check AutoNegotiate complete */ timeout = 0; for (;;) { ret = sam_phyread(priv, priv->phyaddr, MII_MSR, &msr); if (ret < 0) { nlldbg("ERROR: Failed to read MSR\n"); goto errout; } /* Completed successfully? */ if ((msr & MII_MSR_ANEGCOMPLETE) != 0) { /* Yes.. break out of the loop */ nllvdbg("AutoNegotiate complete\n"); break; } /* No.. check for a timeout */ if (++timeout >= PHY_RETRY_MAX) { nlldbg("ERROR: TimeOut\n"); sam_phydump(priv); ret = -ETIMEDOUT; goto errout; } } /* Get the AutoNeg Link partner base page */ ret = sam_phyread(priv, priv->phyaddr, MII_LPA, &lpa); if (ret < 0) { nlldbg("ERROR: Failed to read ANLPAR\n"); goto errout; } /* Setup the EMAC link speed */ regval = sam_getreg(priv, SAM_EMAC_NCFGR); regval &= (EMAC_NCFGR_SPD | EMAC_NCFGR_FD); if (((advertise & lpa) & MII_ADVERTISE_100BASETXFULL) != 0) { /* Set MII for 100BaseTX and Full Duplex */ regval |= (EMAC_NCFGR_SPD | EMAC_NCFGR_FD); } else if (((advertise & lpa) & MII_ADVERTISE_10BASETXFULL) != 0) { /* Set MII for 10BaseT and Full Duplex */ regval |= EMAC_NCFGR_FD; } else if (((advertise & lpa) & MII_ADVERTISE_100BASETXHALF) != 0) { /* Set MII for 100BaseTX and half Duplex */ regval |= EMAC_NCFGR_SPD; } #if 0 else if (((advertise & lpa) & MII_ADVERTISE_10BASETXHALF) != 0) { /* set MII for 10BaseT and half Duplex */ } #endif sam_putreg(priv, SAM_EMAC_NCFGR, regval); /* Select RMII/MII */ regval = sam_getreg(priv, SAM_EMAC_USRIO); #ifdef CONFIG_SAMA5_EMAC_RMII regval |= EMAC_USRIO_RMII; #else /* defined(CONFIG_SAMA5_EMAC_MII) */ regval &= ~EMAC_USRIO_RMII; #endif /* Enable the transceiver clock */ regval |= EMAC_USRIO_CLKEN; sam_putreg(priv, SAM_EMAC_USRIO, regval); errout: /* Disable management port */ regval = sam_getreg(priv, SAM_EMAC_NCR); regval &= ~EMAC_NCR_MPE; sam_putreg(priv, SAM_EMAC_NCR, regval); return ret; } /**************************************************************************** * Function: sam_linkup * * Description: * Check if the link is up * * Parameters: * priv - A reference to the private driver state structure * * Returned Value: * true: The link is up * ****************************************************************************/ static bool sam_linkup(struct sam_emac_s *priv) { uint32_t regval; uint16_t msr; uint16_t physr; bool linkup = false; int ret; /* Enable management port */ regval = sam_getreg(priv, SAM_EMAC_NCR); regval |= EMAC_NCR_MPE; sam_putreg(priv, SAM_EMAC_NCR, regval); ret = sam_phyread(priv, priv->phyaddr, MII_MSR, &msr); if (ret < 0) { nlldbg("ERROR: Failed to read MSR: %d\n", ret); goto errout; } if ((msr & MII_MSR_LINKSTATUS) == 0) { nlldbg("ERROR: MSR LinkStatus: %04x\n", msr); goto errout; } /* Re-configure Link speed */ ret = sam_phyread(priv, priv->phyaddr, CONFIG_SAMA5_EMAC_PHYSR, &physr); if (ret < 0) { nlldbg("ERROR: Failed to read PHYSR: %d\n", ret); goto errout; } regval = sam_getreg(priv, SAM_EMAC_NCFGR); regval &= ~(EMAC_NCFGR_SPD | EMAC_NCFGR_FD); if ((msr & MII_MSR_100BASETXFULL) != 0 && PHYSR_IS100FDX(physr)) { /* Set EMAC for 100BaseTX and Full Duplex */ regval |= (EMAC_NCFGR_SPD | EMAC_NCFGR_FD); } else if ((msr & MII_MSR_10BASETXFULL) != 0 && PHYSR_IS10FDX(physr)) { /* Set MII for 10BaseT and Full Duplex */ regval |= EMAC_NCFGR_FD; } else if ((msr & MII_MSR_100BASETXHALF) != 0 && PHYSR_IS100HDX(physr)) { /* Set MII for 100BaseTX and Half Duplex */ regval |= EMAC_NCFGR_SPD; } #if 0 else if ((msr & MII_MSR_10BASETXHALF) != 0 && PHYSR_IS10HDX(physr)) { /* Set MII for 10BaseT and Half Duplex */ } #endif sam_putreg(priv, SAM_EMAC_NCFGR, regval); /* Start the EMAC transfers */ nllvdbg("Link is up\n"); linkup = true; errout: /* Disable management port */ regval = sam_getreg(priv, SAM_EMAC_NCR); regval &= ~EMAC_NCR_MPE; sam_putreg(priv, SAM_EMAC_NCR, regval); return linkup; } /**************************************************************************** * Function: sam_phyinit * * Description: * Configure the PHY and determine the link speed/duplex. * * Parameters: * priv - A reference to the private driver state structure * * Returned Value: * OK on success; Negated errno on failure. * ****************************************************************************/ static int sam_phyinit(struct sam_emac_s *priv) { uint32_t regval; uint32_t mck; int ret; /* Configure PHY clocking */ regval = sam_getreg(priv, SAM_EMAC_NCFGR); regval &= ~EMAC_NCFGR_CLK_MASK; mck = BOARD_MCK_FREQUENCY; if (mck > (160*1000*1000)) { ndbg("ERROR: Cannot realize PHY clock\n"); return -EINVAL; } else if (mck > (80*1000*1000)) { regval |= EMAC_NCFGR_CLK_DIV64; /* MCK divided by 64 (MCK up to 160 MHz) */ } else if (mck > (40*1000*1000)) { regval |= EMAC_NCFGR_CLK_DIV32; /* MCK divided by 32 (MCK up to 80 MHz) */ } else if (mck > (20*1000*1000)) { regval |= EMAC_NCFGR_CLK_DIV16; /* MCK divided by 16 (MCK up to 40 MHz) */ } else { regval |= EMAC_NCFGR_CLK_DIV8; /* MCK divided by 8 (MCK up to 20 MHz) */ } sam_putreg(priv, SAM_EMAC_NCFGR, regval); /* Check the PHY Address */ priv->phyaddr = CONFIG_SAMA5_EMAC_PHYADDR; ret = sam_phyfind(priv, &priv->phyaddr); if (ret < 0) { nlldbg("ERROR: sam_phyfind failed: %d\n", ret); return ret; } if (priv->phyaddr != CONFIG_SAMA5_EMAC_PHYADDR) { sam_phyreset(priv); } return OK; } /**************************************************************************** * Function: sam_ethgpioconfig * * Description: * Configure PIOs for the EMAC interface. * * Parameters: * priv - A reference to the private driver state structure * * Returned Value: * None. * * Assumptions: * ****************************************************************************/ static inline void sam_ethgpioconfig(struct sam_emac_s *priv) { /* Configure PIO pins to support EMAC */ /* Configure EMAC PIO pins common to both MII and RMII */ sam_configpio(PIO_EMAC_TX0); sam_configpio(PIO_EMAC_TX1); sam_configpio(PIO_EMAC_RX0); sam_configpio(PIO_EMAC_RX1); sam_configpio(PIO_EMAC_TXEN); sam_configpio(PIO_EMAC_CRSDV); sam_configpio(PIO_EMAC_RXER); sam_configpio(PIO_EMAC_REFCK); sam_configpio(PIO_EMAC_MDC); sam_configpio(PIO_EMAC_MDIO); } /**************************************************************************** * Function: sam_txreset * * Description: * Reset the transmit logic * * Parameters: * priv - A reference to the private driver state structure * * Returned Value: * None. * * Assumptions: * ****************************************************************************/ static void sam_txreset(struct sam_emac_s *priv) { uint8_t *txbuffer = priv->txbuffer; struct emac_txdesc_s *txdesc = priv->txdesc; uintptr_t bufaddr; uint32_t physaddr; uint32_t regval; int ndx; /* Disable TX */ regval = sam_getreg(priv, SAM_EMAC_NCR); regval &= ~EMAC_NCR_TE; sam_putreg(priv, SAM_EMAC_NCR, regval); /* Configure the TX descriptors. */ priv->txhead = 0; priv->txtail = 0; for (ndx = 0; ndx < CONFIG_SAMA5_EMAC_NTXBUFFERS; ndx++) { bufaddr = (uint32_t)(&(txbuffer[ndx * EMAC_TX_UNITSIZE])); /* Set the buffer address and mark the descriptor as in used by firmware */ physaddr = sam_physramaddr(bufaddr); txdesc[ndx].addr = physaddr; txdesc[ndx].status = EMACTXD_STA_USED; } /* Mark the final descriptor in the list */ txdesc[CONFIG_SAMA5_EMAC_NTXBUFFERS - 1].status = EMACTXD_STA_USED | EMACTXD_STA_WRAP; /* Flush the entire TX descriptor table to RAM */ cp15_clean_dcache((uintptr_t)txdesc, (uintptr_t)txdesc + CONFIG_SAMA5_EMAC_NTXBUFFERS * sizeof(struct emac_txdesc_s)); /* Set the Transmit Buffer Queue Pointer Register */ physaddr = sam_physramaddr((uintptr_t)txdesc); sam_putreg(priv, SAM_EMAC_TBQP, physaddr); } /**************************************************************************** * Function: sam_rxreset * * Description: * Reset the receive logic * * Parameters: * priv - A reference to the private driver state structure * * Returned Value: * None. * * Assumptions: * ****************************************************************************/ static void sam_rxreset(struct sam_emac_s *priv) { struct emac_rxdesc_s *rxdesc = priv->rxdesc; uint8_t *rxbuffer = priv->rxbuffer; uint32_t bufaddr; uint32_t physaddr; uint32_t regval; int ndx; /* Disable RX */ regval = sam_getreg(priv, SAM_EMAC_NCR); regval &= ~EMAC_NCR_RE; sam_putreg(priv, SAM_EMAC_NCR, regval); /* Configure the RX descriptors. */ priv->rxndx = 0; for (ndx = 0; ndx < CONFIG_SAMA5_EMAC_NRXBUFFERS; ndx++) { bufaddr = (uintptr_t)(&(rxbuffer[ndx * EMAC_RX_UNITSIZE])); DEBUGASSERT((bufaddr & ~EMACRXD_ADDR_MASK) == 0); /* Set the buffer address and remove EMACRXD_ADDR_OWNER and * EMACRXD_ADDR_WRAP. */ physaddr = sam_physramaddr(bufaddr); rxdesc[ndx].addr = physaddr; rxdesc[ndx].status = 0; } /* Mark the final descriptor in the list */ rxdesc[CONFIG_SAMA5_EMAC_NRXBUFFERS - 1].addr |= EMACRXD_ADDR_WRAP; /* Flush the entire RX descriptor table to RAM */ cp15_clean_dcache((uintptr_t)rxdesc, (uintptr_t)rxdesc + CONFIG_SAMA5_EMAC_NRXBUFFERS * sizeof(struct emac_rxdesc_s)); /* Set the Receive Buffer Queue Pointer Register */ physaddr = sam_physramaddr((uintptr_t)rxdesc); sam_putreg(priv, SAM_EMAC_RBQP, physaddr); } /**************************************************************************** * Function: sam_emac_reset * * Description: * Reset the EMAC block. * * Parameters: * priv - A reference to the private driver state structure * * Returned Value: * None. * * Assumptions: * ****************************************************************************/ static void sam_emac_reset(struct sam_emac_s *priv) { uint32_t regval; /* Disable all EMAC interrupts */ sam_putreg(priv, SAM_EMAC_IDR, EMAC_INT_ALL); /* Reset RX and TX logic */ sam_rxreset(priv); sam_txreset(priv); /* Disable RX, TX, and statistics */ regval = EMAC_NCR_TE | EMAC_NCR_RE | EMAC_NCR_WESTAT | EMAC_NCR_CLRSTAT; sam_putreg(priv, SAM_EMAC_NCR, regval); /* Disable clocking to the EMAC peripheral */ sam_emac_disableclk(); } /**************************************************************************** * Function: sam_macaddress * * Description: * Configure the selected MAC address. * * Parameters: * priv - A reference to the private driver state structure * * Returned Value: * OK on success; Negated errno on failure. * * Assumptions: * ****************************************************************************/ static void sam_macaddress(struct sam_emac_s *priv) { struct uip_driver_s *dev = &priv->dev; uint32_t regval; nllvdbg("%s MAC: %02x:%02x:%02x:%02x:%02x:%02x\n", dev->d_ifname, dev->d_mac.ether_addr_octet[0], dev->d_mac.ether_addr_octet[1], dev->d_mac.ether_addr_octet[2], dev->d_mac.ether_addr_octet[3], dev->d_mac.ether_addr_octet[4], dev->d_mac.ether_addr_octet[5]); /* Set the MAC address */ regval = (uint32_t)dev->d_mac.ether_addr_octet[0] | (uint32_t)dev->d_mac.ether_addr_octet[1] << 8 | (uint32_t)dev->d_mac.ether_addr_octet[2] << 16 | (uint32_t)dev->d_mac.ether_addr_octet[3] << 24; sam_putreg(priv, SAM_EMAC_SA1B, regval); regval = (uint32_t)dev->d_mac.ether_addr_octet[4] | (uint32_t)dev->d_mac.ether_addr_octet[5] << 8; sam_putreg(priv, SAM_EMAC_SA1T, regval); } /**************************************************************************** * Function: sam_emac_configure * * Description: * Configure the EMAC interface for normal operation. * * Parameters: * priv - A reference to the private driver state structure * * Returned Value: * OK on success; Negated errno on failure. * * Assumptions: * ****************************************************************************/ static int sam_emac_configure(struct sam_emac_s *priv) { uint32_t regval; nllvdbg("Entry\n"); /* Enable clocking to the EMAC peripheral */ sam_emac_enableclk(); /* Disable TX, RX, interrupts, etc. */ sam_putreg(priv, SAM_EMAC_NCR, 0); sam_putreg(priv, SAM_EMAC_IDR, EMAC_INT_ALL); regval = sam_getreg(priv, SAM_EMAC_NCR); regval |= EMAC_NCR_CLRSTAT; sam_putreg(priv, SAM_EMAC_NCR, regval); /* Clear all status bits in the receive status register. */ regval = (EMAC_RSR_OVR | EMAC_RSR_REC | EMAC_RSR_BNA); sam_putreg(priv, SAM_EMAC_RSR, regval); /* Clear all status bits in the transmit status register */ regval = (EMAC_TSR_UBR | EMAC_TSR_COL | EMAC_TSR_RLES | EMAC_TSR_BEX | EMAC_TSR_COMP | EMAC_TSR_UND); sam_putreg(priv, SAM_EMAC_TSR, regval); /* Clear any pending interrupts */ (void)sam_getreg(priv, SAM_EMAC_ISR); /* Enable/disable the copy of data into the buffers, ignore broadcasts. * Don't copy FCS. */ regval = sam_getreg(priv, SAM_EMAC_NCFGR); regval |= (EMAC_NCFGR_DRFCS | EMAC_NCFGR_PAE); #ifdef CONFIG_NET_PROMISCUOUS regval |= EMAC_NCFGR_CAF; #else regval &= ~EMAC_NCFGR_CAF; #endif #ifdef CONFIG_SAMA5_EMACA_NBC regval |= EMAC_NCFGR_NBC; #else regval &= ~EMAC_NCFGR_NBC; #endif sam_putreg(priv, SAM_EMAC_NCFGR, regval); /* Reset TX and RX */ sam_rxreset(priv); sam_txreset(priv); /* Enable Rx and Tx, plus the stats register. */ regval = sam_getreg(priv, SAM_EMAC_NCR); regval |= (EMAC_NCR_RE | EMAC_NCR_TE | EMAC_NCR_WESTAT); sam_putreg(priv, SAM_EMAC_NCR, regval); /* Setup the interrupts for TX events, RX events, and error events */ regval = (EMAC_INT_RCOMP | EMAC_INT_RXUBR | EMAC_INT_TUND | EMAC_INT_RLE | EMAC_INT_TXERR | EMAC_INT_TCOMP | EMAC_INT_ROVR | EMAC_INT_HRESP | EMAC_INT_PFR | EMAC_INT_PTZ); sam_putreg(priv, SAM_EMAC_IER, regval); return OK; } /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Function: sam_emac_initialize * * Description: * Initialize the EMAC driver. * * Input Parameters: * None * * Returned Value: * OK on success; Negated errno on failure. * * Assumptions: * Called very early in the initialization sequence. * ****************************************************************************/ int sam_emac_initialize(void) { struct sam_emac_s *priv = &g_emac; int ret; /* Initialize the driver structure */ memset(priv, 0, sizeof(struct sam_emac_s)); priv->dev.d_ifup = sam_ifup; /* I/F up (new IP address) callback */ priv->dev.d_ifdown = sam_ifdown; /* I/F down callback */ priv->dev.d_txavail = sam_txavail; /* New TX data callback */ #ifdef CONFIG_NET_IGMP priv->dev.d_addmac = sam_addmac; /* Add multicast MAC address */ priv->dev.d_rmmac = sam_rmmac; /* Remove multicast MAC address */ #endif priv->dev.d_private = (void*)&g_emac; /* Used to recover private state from dev */ /* Create a watchdog for timing polling for and timing of transmissions */ priv->txpoll = wd_create(); if (!priv->txpoll) { ndbg("ERROR: Failed to create periodic poll timer\n"); ret = -EAGAIN; goto errout; } priv->txtimeout = wd_create(); /* Create TX timeout timer */ if (!priv->txpoll) { ndbg("ERROR: Failed to create periodic poll timer\n"); ret = -EAGAIN; goto errout_with_txpoll; } /* Configure PIO pins to support EMAC */ sam_ethgpioconfig(priv); /* Allocate buffers */ ret = sam_buffer_initialize(priv); if (ret < 0) { ndbg("ERROR: sam_buffer_initialize failed: %d\n", ret); goto errout_with_txtimeout; } /* Attach the IRQ to the driver. It will not be enabled at the AIC until * the interface is in the 'up' state. */ ret = irq_attach(SAM_IRQ_EMAC, sam_emac_interrupt); if (ret < 0) { ndbg("ERROR: Failed to attach the handler to the IRQ%d\n", SAM_IRQ_EMAC); goto errout_with_buffers; } /* Enable clocking to the EMAC peripheral (just for sam_ifdown()) */ sam_emac_enableclk(); /* Put the interface in the down state (disabling clocking again). */ ret = sam_ifdown(&priv->dev); if (ret < 0) { ndbg("ERROR: Failed to put the interface in the down state: %d\n", ret); goto errout_with_buffers; } /* Register the device with the OS so that socket IOCTLs can be performed */ ret = netdev_register(&priv->dev); if (ret >= 0) { return ret; } ndbg("ERROR: netdev_register() failed: %d\n", ret); errout_with_buffers: sam_buffer_free(priv); errout_with_txtimeout: wd_delete(priv->txtimeout); errout_with_txpoll: wd_delete(priv->txpoll); errout: return ret; } #endif /* CONFIG_NET && CONFIG_SAMA5_EMACA */