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nuttx/drivers/net/dm90x0.c
Juha Niskanen f3490e42c3 Fix typos in comments
2020-03-03 09:11:57 -06:00

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/****************************************************************************
* drivers/net/dm90x0.c
*
* Copyright (C) 2007-2010, 2014-2016, 2018 Gregory Nutt. All rights
* reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* References: Davicom data sheets (DM9000-DS-F03-041906.pdf,
* DM9010-DS-F01-103006.pdf) and looking at lots of other DM90x0
* drivers.
*
* 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 name NuttX 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 <nuttx/config.h>
#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 <stdint.h>
#include <stdbool.h>
#include <time.h>
#include <string.h>
#include <debug.h>
#include <errno.h>
#include <arpa/inet.h>
#include <net/ethernet.h>
#include <nuttx/arch.h>
#include <nuttx/irq.h>
#include <nuttx/wdog.h>
#include <nuttx/wqueue.h>
#include <nuttx/net/arp.h>
#include <nuttx/net/netdev.h>
#ifdef CONFIG_NET_PKT
# include <nuttx/net/pkt.h>
#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 the 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 */
WDOG_ID dm_txpoll; /* TX poll timer */
WDOG_ID 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(int argc, uint32_t arg, ...);
static void dm9x_poll_work(FAR void *arg);
static void dm9x_poll_expiry(int argc, uint32_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, 1, (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 will 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 network 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 packet tap */
pkt_input(&priv->dm_dev);
#endif
/* We only 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 the 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 the 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:
* argc - The number of available arguments
* arg - The first argument
*
* Returned Value:
* None
*
* Assumptions:
* Global interrupts are disabled by the watchdog logic.
*
****************************************************************************/
static void dm9x_txtimeout_expiry(int argc, 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))
{
/* If so, 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, 1,
(wdparm_t)priv);
net_unlock();
}
/****************************************************************************
* Name: dm9x_poll_expiry
*
* Description:
* Periodic timer handler. Called from the timer interrupt handler.
*
* Input 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 dm9x_poll_expiry(int argc, 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",
dev->d_ipaddr & 0xff, (dev->d_ipaddr >> 8) & 0xff,
(dev->d_ipaddr >> 16) & 0xff, 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, 1,
(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_poll(&priv->dm_dev, 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 */
putreg(DM9X_NETS, (DM9X_NETS_WAKEST | DM9X_NETS_TX1END | DM9X_NETS_TX2END)); /* Clear TX status */
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: DM90x0 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 = (FAR void *)g_dm9x; /* Used to recover private state from dev */
/* Create a watchdog for timing polling for and timing of transmissions */
g_dm9x[0].dm_txpoll = wd_create(); /* Create periodic poll timer */
g_dm9x[0].dm_txtimeout = wd_create(); /* Create TX timeout timer */
/* 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 */
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