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LM3S ethernet driver development

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1811 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2009-05-21 00:23:53 +00:00
parent 588131b6bf
commit 4114cee9a8
2 changed files with 455 additions and 93 deletions
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547
arch/arm/src/lm3s/lm3s_ethernet.c
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@ -53,12 +53,20 @@
#include <net/uip/uip-arp.h> #include <net/uip/uip-arp.h>
#include <net/uip/uip-arch.h> #include <net/uip/uip-arch.h>
#include "up_arch.h"
#include "chip.h"
#include "lm3s_internal.h" #include "lm3s_internal.h"
/**************************************************************************** /****************************************************************************
* Definitions * Definitions
****************************************************************************/ ****************************************************************************/
#ifdef CONFIG_ARCH_CHIP_LM3S6918
# define LM3S_NINTERFACES 1
#else
# error "No Ethernet support for this LM3S chip"
#endif
/* TX poll deley = 1 seconds. CLK_TCK is the number of clock ticks per second */ /* TX poll deley = 1 seconds. CLK_TCK is the number of clock ticks per second */
#define LM3S_WDDELAY (1*CLK_TCK) #define LM3S_WDDELAY (1*CLK_TCK)
@ -70,7 +78,7 @@
/* This is a helper pointer for accessing the contents of the Ethernet header */ /* This is a helper pointer for accessing the contents of the Ethernet header */
#define BUF ((struct uip_eth_hdr *)skel->ld_dev.d_buf) #define BUF ((struct uip_eth_hdr *)priv->ld_dev.d_buf)
/**************************************************************************** /****************************************************************************
* Private Types * Private Types
@ -82,6 +90,15 @@
struct lm3s_driver_s struct lm3s_driver_s
{ {
/* The following fields would only be necessary on chips that support
* multiple Ethernet controllers.
*/
#if LM3S_NINTERFACES > 1
uint32 ld_base; /* Ethernet controller base address */
int ld-irq; /* Ethernet controller IRQ */
#endif
boolean ld_bifup; /* TRUE:ifup FALSE:ifdown */ boolean ld_bifup; /* TRUE:ifup FALSE:ifdown */
WDOG_ID ld_txpoll; /* TX poll timer */ WDOG_ID ld_txpoll; /* TX poll timer */
WDOG_ID ld_txtimeout; /* TX timeout timer */ WDOG_ID ld_txtimeout; /* TX timeout timer */
@ -95,21 +112,34 @@ struct lm3s_driver_s
* Private Data * Private Data
****************************************************************************/ ****************************************************************************/
static struct lm3s_driver_s g_lm3sdev; static struct lm3s_driver_s g_lm3sdev[LM3S_NINTERFACES];
/**************************************************************************** /****************************************************************************
* Private Function Prototypes * Private Function Prototypes
****************************************************************************/ ****************************************************************************/
/* Miscellaneous low level helpers */
#if LM3S_NINTERFACES > 1
static uint32 lm3s_ethin(struct lm3s_driver_s *priv, int offset);
static void lm3s_ethout(struct lm3s_driver_s *priv, int offset, uint32 value);
#else
static inline uint32 lm3s_ethin(struct lm3s_driver_s *priv, int offset);
static inline void lm3s_ethout(struct lm3s_driver_s *priv, int offset, uint32 value);
#endif
static void lm3s_ethreset(struct lm3s_driver_s *priv);
static void lm3s_phywrite(struct lm3s_driver_s *priv, int regaddr, uint16 value);
static uint16 lm3s_phyread(struct lm3s_driver_s *priv, int regaddr);
/* Common TX logic */ /* Common TX logic */
static int lm3s_transmit(struct lm3s_driver_s *skel); static int lm3s_transmit(struct lm3s_driver_s *priv);
static int lm3s_uiptxpoll(struct uip_driver_s *dev); static int lm3s_uiptxpoll(struct uip_driver_s *dev);
/* Interrupt handling */ /* Interrupt handling */
static void lm3s_receive(struct lm3s_driver_s *skel); static void lm3s_receive(struct lm3s_driver_s *priv);
static void lm3s_txdone(struct lm3s_driver_s *skel); static void lm3s_txdone(struct lm3s_driver_s *priv);
static int lm3s_interrupt(int irq, FAR void *context); static int lm3s_interrupt(int irq, FAR void *context);
/* Watchdog timer expirations */ /* Watchdog timer expirations */
@ -128,14 +158,68 @@ static int lm3s_txavail(struct uip_driver_s *dev);
****************************************************************************/ ****************************************************************************/
/**************************************************************************** /****************************************************************************
* Function: lm3s_transmit * Function: lm3s_ethin
* *
* Description: * Description:
* Start hardware transmission. Called either from the txdone interrupt * Read a register from the Ethernet module
* handling or from watchdog based polling.
* *
* Parameters: * Parameters:
* skel - Reference to the driver state structure * priv - Reference to the driver state structure
* offset - Byte offset of the register from the ethernet base address
*
* Returned Value:
* Register value
*
****************************************************************************/
#if LM3S_NINTERFACES > 1
static uint32 lm3s_ethin(struct lm3s_driver_s *priv, int offset)
{
return getreg32(priv->ld_base + offset);
}
#else
static inline uint32 lm3s_ethin(struct lm3s_driver_s *priv, int offset)
{
return getreg32(LM3S_ETHCON_BASE + offset);
}
#endif
/****************************************************************************
* Function: lm3s_ethout
*
* Description:
* Write a register to the Ethernet module
*
* Parameters:
* priv - Reference to the driver state structure
* offset - Byte offset of the register from the ethernet base address
* value - The value to write the the Ethernet register
*
* Returned Value:
* None
*
****************************************************************************/
#if LM3S_NINTERFACES > 1
static void lm3s_ethout(struct lm3s_driver_s *priv, int offset, uint32 value)
{
putreg32(value, priv->ld_base + offset);
}
#else
static inline void lm3s_ethout(struct lm3s_driver_s *priv, int offset, uint32 value)
{
putreg32(value, LM3S_ETHCON_BASE + offset);
}
#endif
/****************************************************************************
* Function: lm3s_ethreset
*
* Description:
* Configure and reset the Ethernet module, leaving it in a disabled state.
*
* Parameters:
* priv - Reference to the driver state structure
* *
* Returned Value: * Returned Value:
* OK on success; a negated errno on failure * OK on success; a negated errno on failure
@ -144,7 +228,136 @@ static int lm3s_txavail(struct uip_driver_s *dev);
* *
****************************************************************************/ ****************************************************************************/
static int lm3s_transmit(struct lm3s_driver_s *skel) static void lm3s_ethreset(struct lm3s_driver_s *priv)
{
irqstate_t flags;
uint32 regval;
volatile uint32 delay;
uint32 div;
#if LM3S_NINTERFACES > 1
# error "If multiple interfaces are supported, this function would have to be redesigned"
#endif
/* Make sure that clocking is enabled for the Ethernet (and PHY) peripherals */
flags = irqsave();
regval = getreg32(LM3S_SYSCON_RCGC2);
regval |= (SYSCON_RCGC2_EMAC0|SYSCON_RCGC2_EPHY0);
putreg32(regval, LM3S_SYSCON_RCGC2);
nvdbg("RCGC2: %08x\n", regval);
/* Put the Ethernet controller into the reset state */
regval = getreg32(LM3S_SYSCON_SRCR2);
regval |= (SYSCON_SRCR2_EMAC0|SYSCON_SRCR2_EPHY0);
putreg32(regval, LM3S_SYSCON_SRCR2);
/* Wait just a bit */
for (delay = 0; delay < 16; delay++);
/* Then take the Ethernet controller out of the reset state */
regval &= ~(SYSCON_SRCR2_EMAC0|SYSCON_SRCR2_EPHY0);
putreg32(regval, LM3S_SYSCON_SRCR2);
nvdbg("SRCR2: %08x\n", regval);
/* Enable Port F for Ethernet LEDs: LED0=Bit 3; LED1=Bit 2 */
#ifdef CONFIG_LM3S_ETHLEDS
/* Configure the pins for the peripheral function */
lm3s_configgpio(GPIO_ETHPHY_LED0 | GPIO_STRENGTH_2MA | GPIO_PADTYPE_STD);
lm3s_configgpio(GPIO_ETHPHY_LED1 | GPIO_STRENGTH_2MA | GPIO_PADTYPE_STD);
#endif
/* Disable all Ethernet controller interrupts */
regval = lm3s_ethin(priv, LM3S_MAC_IM_OFFSET);
regval &= ~MAC_IM_ALLINTS;
lm3s_ethout(priv, LM3S_MAC_IM_OFFSET, regval);
/* Clear any pending interrupts (shouldn't be any) */
regval = lm3s_ethin(priv, LM3S_MAC_RIS_OFFSET);
lm3s_ethout(priv, LM3S_MAC_IACK_OFFSET, regval);
/* Set the management clock divider register for access to the PHY
* register set. The MDC clock is divided down from the system clock per:
*
* MCLK_FREQUENCY = SYSCLK_FREQUENCY / (2 * (div + 1))
* div = (SYSCLK_FREQUENCY / 2 / MCLK_FREQUENCY) - 1
*
* Where MCLK_FREQUENCY is 2,500,000. We will add 1 to assure the max
* MCLK_FREQUENCY is not exceeded.
*/
div = SYSCLK_FREQUENCY / 2 / 2500000;
lm3s_ethout(priv, LM3S_MAC_MDV_OFFSET, div);
nvdbg("MDV: %08x\n", div);
irqrestore(flags);
}
/****************************************************************************
* Function: lm3s_phywrite
*
* Description:
* Write a 16-bit word to a PHY register
*
* Parameters:
* priv - Reference to the driver state structure
* regaddr - Address of the PHY register to write
* value - The value to write to the register
*
* Returned Value:
* None
*
****************************************************************************/
static void lm3s_phywrite(struct lm3s_driver_s *priv, int regaddr, uint16 value)
{
# warning "Missing Logic"
}
/****************************************************************************
* Function: lm3s_phywrite
*
* Description:
* Write a 16-bit word to a PHY register
*
* Parameters:
* priv - Reference to the driver state structure
* regaddr - Address of the PHY register to write
* value - The value to write to the register
*
* Returned Value:
* None
*
****************************************************************************/
static uint16 lm3s_phyread(struct lm3s_driver_s *priv, int regaddr)
{
# warning "Missing Logic"
return 0;
}
/****************************************************************************
* Function: lm3s_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
*
****************************************************************************/
static int lm3s_transmit(struct lm3s_driver_s *priv)
{ {
/* Verify that the hardware is ready to send another packet */ /* Verify that the hardware is ready to send another packet */
#warning "Missing logic" #warning "Missing logic"
@ -152,13 +365,13 @@ static int lm3s_transmit(struct lm3s_driver_s *skel)
/* Disable Ethernet interrupts */ /* Disable Ethernet interrupts */
/* Send the packet: address=skel->ld_dev.d_buf, length=skel->ld_dev.d_len */ /* Send the packet: address=priv->ld_dev.d_buf, length=priv->ld_dev.d_len */
/* Restore Ethernet interrupts */ /* Restore Ethernet interrupts */
/* Setup the TX timeout watchdog (perhaps restarting the timer) */ /* Setup the TX timeout watchdog (perhaps restarting the timer) */
(void)wd_start(skel->ld_txtimeout, LM3S_TXTIMEOUT, lm3s_txtimeout, 1, (uint32)skel); (void)wd_start(priv->ld_txtimeout, LM3S_TXTIMEOUT, lm3s_txtimeout, 1, (uint32)priv);
return OK; return OK;
} }
@ -185,16 +398,16 @@ static int lm3s_transmit(struct lm3s_driver_s *skel)
static int lm3s_uiptxpoll(struct uip_driver_s *dev) static int lm3s_uiptxpoll(struct uip_driver_s *dev)
{ {
struct lm3s_driver_s *skel = (struct lm3s_driver_s *)dev->d_private; struct lm3s_driver_s *priv = (struct lm3s_driver_s *)dev->d_private;
/* If the polling resulted in data that should be sent out on the network, /* If the polling resulted in data that should be sent out on the network,
* the field d_len is set to a value > 0. * the field d_len is set to a value > 0.
*/ */
if (skel->ld_dev.d_len > 0) if (priv->ld_dev.d_len > 0)
{ {
uip_arp_out(&skel->ld_dev); uip_arp_out(&priv->ld_dev);
lm3s_transmit(skel); lm3s_transmit(priv);
/* Check if there is room in the device to hold another packet. If not, /* Check if there is room in the device to hold another packet. If not,
* return a non-zero value to terminate the poll. * return a non-zero value to terminate the poll.
@ -216,7 +429,7 @@ static int lm3s_uiptxpoll(struct uip_driver_s *dev)
* An interrupt was received indicating the availability of a new RX packet * An interrupt was received indicating the availability of a new RX packet
* *
* Parameters: * Parameters:
* skel - Reference to the driver state structure * priv - Reference to the driver state structure
* *
* Returned Value: * Returned Value:
* None * None
@ -225,7 +438,7 @@ static int lm3s_uiptxpoll(struct uip_driver_s *dev)
* *
****************************************************************************/ ****************************************************************************/
static void lm3s_receive(struct lm3s_driver_s *skel) static void lm3s_receive(struct lm3s_driver_s *priv)
{ {
do do
{ {
@ -234,8 +447,8 @@ static void lm3s_receive(struct lm3s_driver_s *skel)
/* Check if the packet is a valid size for the uIP buffer configuration */ /* Check if the packet is a valid size for the uIP buffer configuration */
/* Copy the data data from the hardware to skel->ld_dev.d_buf. Set /* Copy the data data from the hardware to priv->ld_dev.d_buf. Set
* amount of data in skel->ld_dev.d_len * amount of data in priv->ld_dev.d_len
*/ */
/* We only accept IP packets of the configured type and ARP packets */ /* We only accept IP packets of the configured type and ARP packets */
@ -247,34 +460,33 @@ static void lm3s_receive(struct lm3s_driver_s *skel)
#endif #endif
{ {
uip_arp_ipin(); uip_arp_ipin();
uip_input(&skel->ld_dev); uip_input(&priv->ld_dev);
/* If the above function invocation resulted in data that should be /* 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. * sent out on the network, the field d_len will set to a value > 0.
*/ */
if (skel->ld_dev.d_len > 0) if (priv->ld_dev.d_len > 0)
{ {
uip_arp_out(&skel->ld_dev); uip_arp_out(&priv->ld_dev);
lm3s_transmit(skel); lm3s_transmit(priv);
} }
} }
else if (BUF->type == htons(UIP_ETHTYPE_ARP)) else if (BUF->type == htons(UIP_ETHTYPE_ARP))
{ {
uip_arp_arpin(&skel->ld_dev); uip_arp_arpin(&priv->ld_dev);
/* If the above function invocation resulted in data that should be /* 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. * sent out on the network, the field d_len will set to a value > 0.
*/ */
if (skel->ld_dev.d_len > 0) if (priv->ld_dev.d_len > 0)
{ {
lm3s_transmit(skel); lm3s_transmit(priv);
} }
} }
}
} }
while (); /* While there are more packets to be processed */ while ( /* FIX ME */ TRUE /* FIX ME */); /* While there are more packets to be processed */
} }
/**************************************************************************** /****************************************************************************
@ -284,7 +496,7 @@ static void lm3s_receive(struct lm3s_driver_s *skel)
* An interrupt was received indicating that the last TX packet(s) is done * An interrupt was received indicating that the last TX packet(s) is done
* *
* Parameters: * Parameters:
* skel - Reference to the driver state structure * priv - Reference to the driver state structure
* *
* Returned Value: * Returned Value:
* None * None
@ -293,18 +505,18 @@ static void lm3s_receive(struct lm3s_driver_s *skel)
* *
****************************************************************************/ ****************************************************************************/
static void lm3s_txdone(struct lm3s_driver_s *skel) static void lm3s_txdone(struct lm3s_driver_s *priv)
{ {
/* Check for errors and update statistics */ /* Check for errors and update statistics */
#warning "Missing logic" #warning "Missing logic"
/* If no further xmits are pending, then cancel the TX timeout */ /* If no further xmits are pending, then cancel the TX timeout */
wd_cancel(skel->ld_txtimeout); wd_cancel(priv->ld_txtimeout);
/* Then poll uIP for new XMIT data */ /* Then poll uIP for new XMIT data */
(void)uip_poll(&skel->ld_dev, lm3s_uiptxpoll); (void)uip_poll(&priv->ld_dev, lm3s_uiptxpoll);
} }
/**************************************************************************** /****************************************************************************
@ -326,7 +538,13 @@ static void lm3s_txdone(struct lm3s_driver_s *skel)
static int lm3s_interrupt(int irq, FAR void *context) static int lm3s_interrupt(int irq, FAR void *context)
{ {
register struct lm3s_driver_s *skel = &g_lm3sdev; register struct lm3s_driver_s *priv;
#if LM3S_NINTERFACES > 1
# error "A mechanism to associate and interface with an IRQ is needed"
#else
priv = &g_lm3sdev[0];
#endif
/* Disable Ethernet interrupts */ /* Disable Ethernet interrupts */
#warning "Missing logic" #warning "Missing logic"
@ -337,11 +555,11 @@ static int lm3s_interrupt(int irq, FAR void *context)
/* Check if we received an incoming packet, if so, call lm3s_receive() */ /* Check if we received an incoming packet, if so, call lm3s_receive() */
lm3s_receive(skel); lm3s_receive(priv);
/* Check is a packet transmission just completed. If so, call lm3s_txdone */ /* Check is a packet transmission just completed. If so, call lm3s_txdone */
lm3s_txdone(skel); lm3s_txdone(priv);
/* Enable Ethernet interrupts (perhaps excluding the TX done interrupt if /* Enable Ethernet interrupts (perhaps excluding the TX done interrupt if
* there are no pending transmissions. * there are no pending transmissions.
@ -370,7 +588,7 @@ static int lm3s_interrupt(int irq, FAR void *context)
static void lm3s_txtimeout(int argc, uint32 arg, ...) static void lm3s_txtimeout(int argc, uint32 arg, ...)
{ {
struct lm3s_driver_s *skel = (struct lm3s_driver_s *)arg; struct lm3s_driver_s *priv = (struct lm3s_driver_s *)arg;
/* Increment statistics and dump debug info */ /* Increment statistics and dump debug info */
#warning "Missing logic" #warning "Missing logic"
@ -379,7 +597,7 @@ static void lm3s_txtimeout(int argc, uint32 arg, ...)
/* Then poll uIP for new XMIT data */ /* Then poll uIP for new XMIT data */
(void)uip_poll(&skel->ld_dev, lm3s_uiptxpoll); (void)uip_poll(&priv->ld_dev, lm3s_uiptxpoll);
} }
/**************************************************************************** /****************************************************************************
@ -401,18 +619,18 @@ static void lm3s_txtimeout(int argc, uint32 arg, ...)
static void lm3s_polltimer(int argc, uint32 arg, ...) static void lm3s_polltimer(int argc, uint32 arg, ...)
{ {
struct lm3s_driver_s *skel = (struct lm3s_driver_s *)arg; struct lm3s_driver_s *priv = (struct lm3s_driver_s *)arg;
/* Check if there is room in the send another Tx packet. */ /* Check if there is room in the send another Tx packet. */
#warning "Missing logic" #warning "Missing logic"
/* If so, update TCP timing states and poll uIP for new XMIT data */ /* If so, update TCP timing states and poll uIP for new XMIT data */
(void)uip_timer(&skel->ld_dev, lm3s_uiptxpoll, LM3S_POLLHSEC); (void)uip_timer(&priv->ld_dev, lm3s_uiptxpoll, LM3S_POLLHSEC);
/* Setup the watchdog poll timer again */ /* Setup the watchdog poll timer again */
(void)wd_start(skel->ld_txpoll, LM3S_WDDELAY, lm3s_polltimer, 1, arg); (void)wd_start(priv->ld_txpoll, LM3S_WDDELAY, lm3s_polltimer, 1, arg);
} }
/**************************************************************************** /****************************************************************************
@ -434,23 +652,123 @@ static void lm3s_polltimer(int argc, uint32 arg, ...)
static int lm3s_ifup(struct uip_driver_s *dev) static int lm3s_ifup(struct uip_driver_s *dev)
{ {
struct lm3s_driver_s *skel = (struct lm3s_driver_s *)dev->d_private; struct lm3s_driver_s *priv = (struct lm3s_driver_s *)dev->d_private;
irqstate_t flags;
uint32 regval;
uint16 phyreg;
ndbg("Bringing up: %d.%d.%d.%d\n", ndbg("Bringing up: %d.%d.%d.%d\n",
dev->d_ipaddr & 0xff, (dev->d_ipaddr >> 8) & 0xff, dev->d_ipaddr & 0xff, (dev->d_ipaddr >> 8) & 0xff,
(dev->d_ipaddr >> 16) & 0xff, dev->d_ipaddr >> 24 ); (dev->d_ipaddr >> 16) & 0xff, dev->d_ipaddr >> 24 );
/* Initilize Ethernet interface */ /* Enable and reset the Ethernet controller */
#warning "Missing logic"
/* Set and activate a timer process */ flags = irqsave();
lm3s_ethreset(priv);
(void)wd_start(skel->ld_txpoll, LM3S_WDDELAY, lm3s_polltimer, 1, (uint32)skel); /* Then configure the Ethernet Controller for normal operation
*
* Setup the transmit control register (Full duplex, TX CRC Auto Generation,
* TX Padding Enabled).
*/
# warning "These should be configurable items"
regval = lm3s_ethin(priv, LM3S_MAC_TCTL_OFFSET);
regval |= (MAC_TCTL_DUPLEX|MAC_TCTL_CRC|MAC_TCTL_PADEN);
lm3s_ethout(priv, LM3S_MAC_TCTL_OFFSET, regval);
nvdbg("TCTL: %08x\n", regval);
/* Setup the receive control register (Disable multicast frames, disable
* promiscuous mode, disable bad CRC rejection). >>> These should be configurable items <<<
*/
# warning "These should be configurable items"
regval = lm3s_ethin(priv, LM3S_MAC_RCTL_OFFSET);
regval &= ~(MAC_RCTL_BADCRC | MAC_RCTL_PRMS | MAC_RCTL_AMUL);
lm3s_ethout(priv, LM3S_MAC_RCTL_OFFSET, regval);
nvdbg("RCTL: %08x\n", regval);
/* Setup the time stamp configuration register */
#ifndef CONFIG_ARCH_CHIP_LM3S6918
regval = lm3s_ethin(priv, LM3S_MAC_TS_OFFSET);
#ifdef CONFIG_LM3S_TIMESTAMP
regval |= MAC_TS_EN;
#else
regval &= ~(MAC_TS_EN);
#endif
lm3s_ethout(priv, LM3S_MAC_TS_OFFSET, regval);
nvdbg("TS: %08x\n", regval);
#endif
/* Wait for the link to come up */
# warning "This should use a semaphore and an interrupt"
ndbg("Waiting for link\n");
do
{
phyreg = lm3s_phyread(priv, MII_MSR);
}
while ((phyreg & MII_MSR_LINKSTATUS) == 0);
ndbg("Link established\n");
/* Reset the receive FIFO */
regval = lm3s_ethin(priv, LM3S_MAC_RCTL_OFFSET);
regval |= MAC_RCTL_RSTFIFO;
lm3s_ethout(priv, LM3S_MAC_RCTL_OFFSET, regval);
/* Enable the Ethernet receiver */
regval = lm3s_ethin(priv, LM3S_MAC_RCTL_OFFSET);
regval |= MAC_RCTL_RXEN;
lm3s_ethout(priv, LM3S_MAC_RCTL_OFFSET, regval);
/* Enable the Ethernet transmitter */
regval = lm3s_ethin(priv, LM3S_MAC_RCTL_OFFSET);
regval |= MAC_TCTL_TXEN;
lm3s_ethout(priv, LM3S_MAC_TCTL_OFFSET, regval);
/* Reset the receive FIFO (again) */
regval = lm3s_ethin(priv, LM3S_MAC_RCTL_OFFSET);
regval |= MAC_RCTL_RSTFIFO;
lm3s_ethout(priv, LM3S_MAC_RCTL_OFFSET, regval);
/* Enable the Ethernet interrupt */ /* Enable the Ethernet interrupt */
skel->ld_bifup = TRUE; #if LM3S_NINTERFACES > 1
up_enable_irq(CONFIG_LM3S_IRQ); up_enable_irq(priv->irq);
#else
up_enable_irq(LM3S_IRQ_ETHCON);
#endif
/* Enable the Ethernet RX packet receipt interrupt */
regval = lm3s_ethin(priv, LM3S_MAC_IM_OFFSET);
regval |= MAC_IM_RXINTM;
lm3s_ethout(priv, LM3S_MAC_IM_OFFSET, regval);
/* Program the hardware with it's MAC address (for filtering) */
regval = (uint32)priv->ld_dev.d_mac.ether_addr_octet[3] << 24 |
(uint32)priv->ld_dev.d_mac.ether_addr_octet[2] << 16 |
(uint32)priv->ld_dev.d_mac.ether_addr_octet[1] << 8 |
(uint32)priv->ld_dev.d_mac.ether_addr_octet[0];
lm3s_ethout(priv, LM3S_MAC_IA0_OFFSET, regval);
regval = (uint32)priv->ld_dev.d_mac.ether_addr_octet[5] << 8 |
(uint32)priv->ld_dev.d_mac.ether_addr_octet[4];
lm3s_ethout(priv, LM3S_MAC_IA1_OFFSET, regval);
/* Set and activate a timer process */
(void)wd_start(priv->ld_txpoll, LM3S_WDDELAY, lm3s_polltimer, 1, (uint32)priv);
priv->ld_bifup = TRUE;
irqrestore(flags);
return OK; return OK;
} }
@ -472,22 +790,26 @@ static int lm3s_ifup(struct uip_driver_s *dev)
static int lm3s_ifdown(struct uip_driver_s *dev) static int lm3s_ifdown(struct uip_driver_s *dev)
{ {
struct lm3s_driver_s *skel = (struct lm3s_driver_s *)dev->d_private; struct lm3s_driver_s *priv = (struct lm3s_driver_s *)dev->d_private;
irqstate_t flags; irqstate_t flags;
/* Disable the Ethernet interrupt */ /* Disable the Ethernet interrupt */
flags = irqsave(); flags = irqsave();
up_disable_irq(CONFIG_LM3S_IRQ); #if LM3S_NINTERFACES > 1
up_disable_irq(priv->irq);
#else
up_disable_irq(LM3S_IRQ_ETHCON);
#endif
/* Cancel the TX poll timer and TX timeout timers */ /* Cancel the TX poll timer and TX timeout timers */
wd_cancel(skel->ld_txpoll); wd_cancel(priv->ld_txpoll);
wd_cancel(skel->ld_txtimeout); wd_cancel(priv->ld_txtimeout);
/* Reset the device */ /* Reset the device */
skel->ld_bifup = FALSE; priv->ld_bifup = FALSE;
irqrestore(flags); irqrestore(flags);
return OK; return OK;
} }
@ -513,21 +835,21 @@ static int lm3s_ifdown(struct uip_driver_s *dev)
static int lm3s_txavail(struct uip_driver_s *dev) static int lm3s_txavail(struct uip_driver_s *dev)
{ {
struct lm3s_driver_s *skel = (struct lm3s_driver_s *)dev->d_private; struct lm3s_driver_s *priv = (struct lm3s_driver_s *)dev->d_private;
irqstate_t flags; irqstate_t flags;
flags = irqsave(); flags = irqsave();
/* Ignore the notification if the interface is not yet up */ /* Ignore the notification if the interface is not yet up */
if (skel->ld_bifup) if (priv->ld_bifup)
{ {
/* Check if there is room in the hardware to hold another outgoing packet. */ /* Check if there is room in the hardware to hold another outgoing packet. */
#warning "Missing logic" #warning "Missing logic"
/* If so, then poll uIP for new XMIT data */ /* If so, then poll uIP for new XMIT data */
(void)uip_poll(&skel->ld_dev, lm3s_uiptxpoll); (void)uip_poll(&priv->ld_dev, lm3s_uiptxpoll);
} }
irqrestore(flags); irqrestore(flags);
@ -542,7 +864,7 @@ static int lm3s_txavail(struct uip_driver_s *dev)
* Function: lm3s_initialize * Function: lm3s_initialize
* *
* Description: * Description:
* Initialize the Ethernet driver * Initialize the Ethernet driver for one interface
* *
* Parameters: * Parameters:
* None * None
@ -556,52 +878,91 @@ static int lm3s_txavail(struct uip_driver_s *dev)
/* Initialize the Ethernet controller and driver */ /* Initialize the Ethernet controller and driver */
int lm3s_initialize(void) #if LM3S_NINTERFACES > 1
int lm3s_initialize(int intf)
#else
static inline int lm3s_initialize(int intf)
#endif
{ {
struct lm3s_driver_s *priv = &g_lm3sdev[intf];
int ret;
/* Check if the Ethernet module is present */ /* Check if the Ethernet module is present */
#if LM3S_NINTERFACES > 1
# error "This debug check only works with one interface"
#else
DEBUGASSERT((getreg32(LM3S_SYSCON_DC4) & (SYSCON_DC4_EMAC0|SYSCON_DC4_EPHY0)) == (SYSCON_DC4_EMAC0|SYSCON_DC4_EPHY0)); DEBUGASSERT((getreg32(LM3S_SYSCON_DC4) & (SYSCON_DC4_EMAC0|SYSCON_DC4_EPHY0)) == (SYSCON_DC4_EMAC0|SYSCON_DC4_EPHY0));
#endif
DEBUGASSERT((unsigned)intf < LM3S_NINTERFACES);
/* Enable Port F for Ethernet LEDs: LED0=Bit 3; LED1=Bit 2 */ /* Initialize the driver structure */
#ifdef CONFIG_LM3S_ETHLEDS memset(priv, 0, sizeof(struct lm3s_driver_s));
/* Configure the pins for the peripheral function */ priv->ld_dev.d_ifup = lm3s_ifup; /* I/F down callback */
priv->ld_dev.d_ifdown = lm3s_ifdown; /* I/F up (new IP address) callback */
priv->ld_dev.d_txavail = lm3s_txavail; /* New TX data callback */
priv->ld_dev.d_private = (void*)&g_lm3sdev[0]; /* Used to recover private state from dev */
lm3s_configgpio(GPIO_ETHPHY_LED0 | GPIO_STRENGTH_2MA | GPIO_PADTYPE_STD); /* Create a watchdog for timing polling for and timing of transmisstions */
lm3s_configgpio(GPIO_ETHPHY_LED1 | GPIO_STRENGTH_2MA | GPIO_PADTYPE_STD);
#if LM3S_NINTERFACES > 1
# error "A mechanism to associate base address an IRQ with an interface is needed"
priv->ld_base = ??; /* Ethernet controller base address */
priv->ld_irq = ??; /* Ethernet controller IRQ number */
#endif
priv->ld_txpoll = wd_create(); /* Create periodic poll timer */
priv->ld_txtimeout = wd_create(); /* Create TX timeout timer */
/* If the board can provide us with a MAC address, get the address
* from the board now. The MAC will not be applied until lm3s_ifup()
* is caleld (and the MAC can be overwritten with a netdev ioctl call).
*/
#ifdef CONFIG_LM3S_BOARDMAC
lm3s_ethernetmac(&priv->ld_dev.d_mac);
#endif #endif
#warning "Missing logic" /* Perform minimal, one-time initialization -- just reset the controller and
* leave it disabled. The Ethernet controller will be reset and properly
* re-initialized each time lm3s_ifup() is called.
*/
lm3s_ethreset(priv);
/* Attach the IRQ to the driver */ /* Attach the IRQ to the driver */
if (irq_attach(CONFIG_LM3S_IRQ, lm3s_interrupt)) #if LM3S_NINTERFACES > 1
ret = irq_attach(priv->irq, lm3s_interrupt);
#else
ret = irq_attach(LM3S_IRQ_ETHCON, lm3s_interrupt);
#endif
if (ret != 0)
{ {
/* We could not attach the ISR to the ISR */ /* We could not attach the ISR to the IRQ */
return -EAGAIN; return -EAGAIN;
} }
/* Initialize the driver structure */
memset(g_lm3sdev, 0, sizeof(struct lm3s_driver_s));
g_lm3sdev.ld_dev.d_ifup = lm3s_ifup; /* I/F down callback */
g_lm3sdev.ld_dev.d_ifdown = lm3s_ifdown; /* I/F up (new IP address) callback */
g_lm3sdev.ld_dev.d_txavail = lm3s_txavail; /* New TX data callback */
g_lm3sdev.ld_dev.d_private = (void*)g_lm3sdev; /* Used to recover private state from dev */
/* Create a watchdog for timing polling for and timing of transmisstions */
g_lm3sdev.ld_txpoll = wd_create(); /* Create periodic poll timer */
g_lm3sdev.ld_txtimeout = wd_create(); /* Create TX timeout timer */
/* Read the MAC address from the hardware into g_lm3sdev.ld_dev.d_mac.ether_addr_octet */
/* Register the device with the OS so that socket IOCTLs can be performed */ /* Register the device with the OS so that socket IOCTLs can be performed */
(void)netdev_register(&g_lm3sdev.ld_dev); (void)netdev_register(&priv->ld_dev);
return OK; return OK;
} }
/************************************************************************************
* Name: up_netinitialize
*
* Description:
* Initialize the first network interface
*
************************************************************************************/
void up_netinitialize(void)
{
(void)lm3s_initialize(0);
}
#endif /* CONFIG_NET && CONFIG_LM3S_ETHERNET */ #endif /* CONFIG_NET && CONFIG_LM3S_ETHERNET */

1
arch/arm/src/lm3s/lm3s_ethernet.h
View File

@ -139,6 +139,7 @@
#define MAC_IM_RXERM (1 << 4) /* Bit 4: Mask Receive Error */ #define MAC_IM_RXERM (1 << 4) /* Bit 4: Mask Receive Error */
#define MAC_IM_MDINTM (1 << 5) /* Bit 5: Mask MII Transaction Complete */ #define MAC_IM_MDINTM (1 << 5) /* Bit 5: Mask MII Transaction Complete */
#define MAC_IM_PHYINTM (1 << 6) /* Bit 6: Mask PHY Interrupt */ #define MAC_IM_PHYINTM (1 << 6) /* Bit 6: Mask PHY Interrupt */
#define MAC_IM_ALLINTS 0x7f
/* Ethernet MAC Receive Control (MACRCTL), offset 0x008 */ /* Ethernet MAC Receive Control (MACRCTL), offset 0x008 */