u-boot/drivers/net/mpc512x_fec.c
Joe Hershberger 1fd92db83d net: cosmetic: Fix var naming net <-> eth drivers
Update the naming convention used in the network stack functions and
variables that Ethernet drivers use to interact with it.

This cleans up the temporary hacks that were added to this interface
along with the DM support.

This patch has a few remaining checkpatch.pl failures that would be out
of the scope of this patch to fix (drivers that are in gross violation
of checkpatch.pl).

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Acked-by: Simon Glass <sjg@chromium.org>
2015-04-18 11:11:33 -06:00

755 lines
17 KiB
C

/*
* (C) Copyright 2003-2010
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* Derived from the MPC8xx FEC driver.
* Adapted for MPC512x by Grzegorz Bernacki <gjb@semihalf.com>
*/
#include <common.h>
#include <malloc.h>
#include <net.h>
#include <netdev.h>
#include <miiphy.h>
#include <asm/io.h>
#include "mpc512x_fec.h"
DECLARE_GLOBAL_DATA_PTR;
#define DEBUG 0
#if !(defined(CONFIG_MII) || defined(CONFIG_CMD_MII))
#error "CONFIG_MII has to be defined!"
#endif
int fec512x_miiphy_read(const char *devname, u8 phyAddr, u8 regAddr, u16 * retVal);
int fec512x_miiphy_write(const char *devname, u8 phyAddr, u8 regAddr, u16 data);
int mpc512x_fec_init_phy(struct eth_device *dev, bd_t * bis);
static uchar rx_buff[FEC_BUFFER_SIZE];
static int rx_buff_idx = 0;
/********************************************************************/
#if (DEBUG & 0x2)
static void mpc512x_fec_phydump (char *devname)
{
u16 phyStatus, i;
u8 phyAddr = CONFIG_PHY_ADDR;
u8 reg_mask[] = {
/* regs to print: 0...8, 21,27,31 */
1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1,
};
for (i = 0; i < 32; i++) {
if (reg_mask[i]) {
miiphy_read (devname, phyAddr, i, &phyStatus);
printf ("Mii reg %d: 0x%04x\n", i, phyStatus);
}
}
}
#endif
/********************************************************************/
static int mpc512x_fec_bd_init (mpc512x_fec_priv *fec)
{
int ix;
/*
* Receive BDs init
*/
for (ix = 0; ix < FEC_RBD_NUM; ix++) {
fec->bdBase->rbd[ix].dataPointer =
(u32)&fec->bdBase->recv_frames[ix];
fec->bdBase->rbd[ix].status = FEC_RBD_EMPTY;
fec->bdBase->rbd[ix].dataLength = 0;
}
/*
* have the last RBD to close the ring
*/
fec->bdBase->rbd[ix - 1].status |= FEC_RBD_WRAP;
fec->rbdIndex = 0;
/*
* Trasmit BDs init
*/
for (ix = 0; ix < FEC_TBD_NUM; ix++) {
fec->bdBase->tbd[ix].status = 0;
}
/*
* Have the last TBD to close the ring
*/
fec->bdBase->tbd[ix - 1].status |= FEC_TBD_WRAP;
/*
* Initialize some indices
*/
fec->tbdIndex = 0;
fec->usedTbdIndex = 0;
fec->cleanTbdNum = FEC_TBD_NUM;
return 0;
}
/********************************************************************/
static void mpc512x_fec_rbd_clean (mpc512x_fec_priv *fec, volatile FEC_RBD * pRbd)
{
/*
* Reset buffer descriptor as empty
*/
if ((fec->rbdIndex) == (FEC_RBD_NUM - 1))
pRbd->status = (FEC_RBD_WRAP | FEC_RBD_EMPTY);
else
pRbd->status = FEC_RBD_EMPTY;
pRbd->dataLength = 0;
/*
* Increment BD count
*/
fec->rbdIndex = (fec->rbdIndex + 1) % FEC_RBD_NUM;
/*
* Now, we have an empty RxBD, notify FEC
* Set Descriptor polling active
*/
out_be32(&fec->eth->r_des_active, 0x01000000);
}
/********************************************************************/
static void mpc512x_fec_tbd_scrub (mpc512x_fec_priv *fec)
{
volatile FEC_TBD *pUsedTbd;
#if (DEBUG & 0x1)
printf ("tbd_scrub: fec->cleanTbdNum = %d, fec->usedTbdIndex = %d\n",
fec->cleanTbdNum, fec->usedTbdIndex);
#endif
/*
* process all the consumed TBDs
*/
while (fec->cleanTbdNum < FEC_TBD_NUM) {
pUsedTbd = &fec->bdBase->tbd[fec->usedTbdIndex];
if (pUsedTbd->status & FEC_TBD_READY) {
#if (DEBUG & 0x20)
printf ("Cannot clean TBD %d, in use\n", fec->usedTbdIndex);
#endif
return;
}
/*
* clean this buffer descriptor
*/
if (fec->usedTbdIndex == (FEC_TBD_NUM - 1))
pUsedTbd->status = FEC_TBD_WRAP;
else
pUsedTbd->status = 0;
/*
* update some indeces for a correct handling of the TBD ring
*/
fec->cleanTbdNum++;
fec->usedTbdIndex = (fec->usedTbdIndex + 1) % FEC_TBD_NUM;
}
}
/********************************************************************/
static void mpc512x_fec_set_hwaddr (mpc512x_fec_priv *fec, unsigned char *mac)
{
u8 currByte; /* byte for which to compute the CRC */
int byte; /* loop - counter */
int bit; /* loop - counter */
u32 crc = 0xffffffff; /* initial value */
/*
* The algorithm used is the following:
* we loop on each of the six bytes of the provided address,
* and we compute the CRC by left-shifting the previous
* value by one position, so that each bit in the current
* byte of the address may contribute the calculation. If
* the latter and the MSB in the CRC are different, then
* the CRC value so computed is also ex-ored with the
* "polynomium generator". The current byte of the address
* is also shifted right by one bit at each iteration.
* This is because the CRC generatore in hardware is implemented
* as a shift-register with as many ex-ores as the radixes
* in the polynomium. This suggests that we represent the
* polynomiumm itself as a 32-bit constant.
*/
for (byte = 0; byte < 6; byte++) {
currByte = mac[byte];
for (bit = 0; bit < 8; bit++) {
if ((currByte & 0x01) ^ (crc & 0x01)) {
crc >>= 1;
crc = crc ^ 0xedb88320;
} else {
crc >>= 1;
}
currByte >>= 1;
}
}
crc = crc >> 26;
/*
* Set individual hash table register
*/
if (crc >= 32) {
out_be32(&fec->eth->iaddr1, (1 << (crc - 32)));
out_be32(&fec->eth->iaddr2, 0);
} else {
out_be32(&fec->eth->iaddr1, 0);
out_be32(&fec->eth->iaddr2, (1 << crc));
}
/*
* Set physical address
*/
out_be32(&fec->eth->paddr1, (mac[0] << 24) + (mac[1] << 16) +
(mac[2] << 8) + mac[3]);
out_be32(&fec->eth->paddr2, (mac[4] << 24) + (mac[5] << 16) +
0x8808);
}
/********************************************************************/
static int mpc512x_fec_init (struct eth_device *dev, bd_t * bis)
{
mpc512x_fec_priv *fec = (mpc512x_fec_priv *)dev->priv;
#if (DEBUG & 0x1)
printf ("mpc512x_fec_init... Begin\n");
#endif
mpc512x_fec_set_hwaddr (fec, dev->enetaddr);
out_be32(&fec->eth->gaddr1, 0x00000000);
out_be32(&fec->eth->gaddr2, 0x00000000);
mpc512x_fec_init_phy (dev, bis);
/* Set interrupt mask register */
out_be32(&fec->eth->imask, 0x00000000);
/* Clear FEC-Lite interrupt event register(IEVENT) */
out_be32(&fec->eth->ievent, 0xffffffff);
/* Set transmit fifo watermark register(X_WMRK), default = 64 */
out_be32(&fec->eth->x_wmrk, 0x0);
/* Set Opcode/Pause Duration Register */
out_be32(&fec->eth->op_pause, 0x00010020);
/* Frame length=1522; MII mode */
out_be32(&fec->eth->r_cntrl, (FEC_MAX_FRAME_LEN << 16) | 0x24);
/* Half-duplex, heartbeat disabled */
out_be32(&fec->eth->x_cntrl, 0x00000000);
/* Enable MIB counters */
out_be32(&fec->eth->mib_control, 0x0);
/* Setup recv fifo start and buff size */
out_be32(&fec->eth->r_fstart, 0x500);
out_be32(&fec->eth->r_buff_size, FEC_BUFFER_SIZE);
/* Setup BD base addresses */
out_be32(&fec->eth->r_des_start, (u32)fec->bdBase->rbd);
out_be32(&fec->eth->x_des_start, (u32)fec->bdBase->tbd);
/* DMA Control */
out_be32(&fec->eth->dma_control, 0xc0000000);
/* Enable FEC */
setbits_be32(&fec->eth->ecntrl, 0x00000006);
/* Initilize addresses and status words of BDs */
mpc512x_fec_bd_init (fec);
/* Descriptor polling active */
out_be32(&fec->eth->r_des_active, 0x01000000);
#if (DEBUG & 0x1)
printf("mpc512x_fec_init... Done \n");
#endif
return 1;
}
/********************************************************************/
int mpc512x_fec_init_phy (struct eth_device *dev, bd_t * bis)
{
mpc512x_fec_priv *fec = (mpc512x_fec_priv *)dev->priv;
const u8 phyAddr = CONFIG_PHY_ADDR; /* Only one PHY */
int timeout = 1;
u16 phyStatus;
#if (DEBUG & 0x1)
printf ("mpc512x_fec_init_phy... Begin\n");
#endif
/*
* Clear FEC-Lite interrupt event register(IEVENT)
*/
out_be32(&fec->eth->ievent, 0xffffffff);
/*
* Set interrupt mask register
*/
out_be32(&fec->eth->imask, 0x00000000);
if (fec->xcv_type != SEVENWIRE) {
/*
* Set MII_SPEED = (1/(mii_speed * 2)) * System Clock
* and do not drop the Preamble.
*/
out_be32(&fec->eth->mii_speed,
(((gd->arch.ips_clk / 1000000) / 5) + 1) << 1);
/*
* Reset PHY, then delay 300ns
*/
miiphy_write (dev->name, phyAddr, 0x0, 0x8000);
udelay (1000);
if (fec->xcv_type == MII10) {
/*
* Force 10Base-T, FDX operation
*/
#if (DEBUG & 0x2)
printf ("Forcing 10 Mbps ethernet link... ");
#endif
miiphy_read (dev->name, phyAddr, 0x1, &phyStatus);
miiphy_write (dev->name, phyAddr, 0x0, 0x0180);
timeout = 20;
do { /* wait for link status to go down */
udelay (10000);
if ((timeout--) == 0) {
#if (DEBUG & 0x2)
printf ("hmmm, should not have waited...");
#endif
break;
}
miiphy_read (dev->name, phyAddr, 0x1, &phyStatus);
#if (DEBUG & 0x2)
printf ("=");
#endif
} while ((phyStatus & 0x0004)); /* !link up */
timeout = 1000;
do { /* wait for link status to come back up */
udelay (10000);
if ((timeout--) == 0) {
printf ("failed. Link is down.\n");
break;
}
miiphy_read (dev->name, phyAddr, 0x1, &phyStatus);
#if (DEBUG & 0x2)
printf ("+");
#endif
} while (!(phyStatus & 0x0004)); /* !link up */
#if (DEBUG & 0x2)
printf ("done.\n");
#endif
} else { /* MII100 */
/*
* Set the auto-negotiation advertisement register bits
*/
miiphy_write (dev->name, phyAddr, 0x4, 0x01e1);
/*
* Set MDIO bit 0.12 = 1(&& bit 0.9=1?) to enable auto-negotiation
*/
miiphy_write (dev->name, phyAddr, 0x0, 0x1200);
/*
* Wait for AN completion
*/
timeout = 2500;
do {
udelay (1000);
if ((timeout--) == 0) {
#if (DEBUG & 0x2)
printf ("PHY auto neg 0 failed...\n");
#endif
return -1;
}
if (miiphy_read (dev->name, phyAddr, 0x1, &phyStatus) != 0) {
#if (DEBUG & 0x2)
printf ("PHY auto neg 1 failed 0x%04x...\n", phyStatus);
#endif
return -1;
}
} while (!(phyStatus & 0x0004));
#if (DEBUG & 0x2)
printf ("PHY auto neg complete! \n");
#endif
}
}
#if (DEBUG & 0x2)
if (fec->xcv_type != SEVENWIRE)
mpc512x_fec_phydump (dev->name);
#endif
#if (DEBUG & 0x1)
printf ("mpc512x_fec_init_phy... Done \n");
#endif
return 1;
}
/********************************************************************/
static void mpc512x_fec_halt (struct eth_device *dev)
{
mpc512x_fec_priv *fec = (mpc512x_fec_priv *)dev->priv;
int counter = 0xffff;
#if (DEBUG & 0x2)
if (fec->xcv_type != SEVENWIRE)
mpc512x_fec_phydump (dev->name);
#endif
/*
* mask FEC chip interrupts
*/
out_be32(&fec->eth->imask, 0);
/*
* issue graceful stop command to the FEC transmitter if necessary
*/
setbits_be32(&fec->eth->x_cntrl, 0x00000001);
/*
* wait for graceful stop to register
*/
while ((counter--) && (!(in_be32(&fec->eth->ievent) & 0x10000000)))
;
/*
* Disable the Ethernet Controller
*/
clrbits_be32(&fec->eth->ecntrl, 0x00000002);
/*
* Issue a reset command to the FEC chip
*/
setbits_be32(&fec->eth->ecntrl, 0x1);
/*
* wait at least 16 clock cycles
*/
udelay (10);
#if (DEBUG & 0x3)
printf ("Ethernet task stopped\n");
#endif
}
/********************************************************************/
static int mpc512x_fec_send(struct eth_device *dev, void *eth_data,
int data_length)
{
/*
* This routine transmits one frame. This routine only accepts
* 6-byte Ethernet addresses.
*/
mpc512x_fec_priv *fec = (mpc512x_fec_priv *)dev->priv;
volatile FEC_TBD *pTbd;
#if (DEBUG & 0x20)
printf("tbd status: 0x%04x\n", fec->tbdBase[fec->tbdIndex].status);
#endif
/*
* Clear Tx BD ring at first
*/
mpc512x_fec_tbd_scrub (fec);
/*
* Check for valid length of data.
*/
if ((data_length > 1500) || (data_length <= 0)) {
return -1;
}
/*
* Check the number of vacant TxBDs.
*/
if (fec->cleanTbdNum < 1) {
#if (DEBUG & 0x20)
printf ("No available TxBDs ...\n");
#endif
return -1;
}
/*
* Get the first TxBD to send the mac header
*/
pTbd = &fec->bdBase->tbd[fec->tbdIndex];
pTbd->dataLength = data_length;
pTbd->dataPointer = (u32)eth_data;
pTbd->status |= FEC_TBD_LAST | FEC_TBD_TC | FEC_TBD_READY;
fec->tbdIndex = (fec->tbdIndex + 1) % FEC_TBD_NUM;
/* Activate transmit Buffer Descriptor polling */
out_be32(&fec->eth->x_des_active, 0x01000000);
#if (DEBUG & 0x8)
printf ( "+" );
#endif
fec->cleanTbdNum -= 1;
/*
* wait until frame is sent .
*/
while (pTbd->status & FEC_TBD_READY) {
udelay (10);
#if (DEBUG & 0x8)
printf ("TDB status = %04x\n", pTbd->status);
#endif
}
return 0;
}
/********************************************************************/
static int mpc512x_fec_recv (struct eth_device *dev)
{
/*
* This command pulls one frame from the card
*/
mpc512x_fec_priv *fec = (mpc512x_fec_priv *)dev->priv;
volatile FEC_RBD *pRbd = &fec->bdBase->rbd[fec->rbdIndex];
unsigned long ievent;
int frame_length = 0;
#if (DEBUG & 0x1)
printf ("mpc512x_fec_recv %d Start...\n", fec->rbdIndex);
#endif
#if (DEBUG & 0x8)
printf( "-" );
#endif
/*
* Check if any critical events have happened
*/
ievent = in_be32(&fec->eth->ievent);
out_be32(&fec->eth->ievent, ievent);
if (ievent & 0x20060000) {
/* BABT, Rx/Tx FIFO errors */
mpc512x_fec_halt (dev);
mpc512x_fec_init (dev, NULL);
return 0;
}
if (ievent & 0x80000000) {
/* Heartbeat error */
setbits_be32(&fec->eth->x_cntrl, 0x00000001);
}
if (ievent & 0x10000000) {
/* Graceful stop complete */
if (in_be32(&fec->eth->x_cntrl) & 0x00000001) {
mpc512x_fec_halt (dev);
clrbits_be32(&fec->eth->x_cntrl, 0x00000001);;
mpc512x_fec_init (dev, NULL);
}
}
if (!(pRbd->status & FEC_RBD_EMPTY)) {
if (!(pRbd->status & FEC_RBD_ERR) &&
((pRbd->dataLength - 4) > 14)) {
/*
* Get buffer size
*/
if (pRbd->status & FEC_RBD_LAST)
frame_length = pRbd->dataLength - 4;
else
frame_length = pRbd->dataLength;
#if (DEBUG & 0x20)
{
int i;
printf ("recv data length 0x%08x data hdr: ",
pRbd->dataLength);
for (i = 0; i < 14; i++)
printf ("%x ", *((u8*)pRbd->dataPointer + i));
printf("\n");
}
#endif
/*
* Fill the buffer and pass it to upper layers
*/
memcpy (&rx_buff[rx_buff_idx], (void*)pRbd->dataPointer,
frame_length - rx_buff_idx);
rx_buff_idx = frame_length;
if (pRbd->status & FEC_RBD_LAST) {
net_process_received_packet((uchar *)rx_buff,
frame_length);
rx_buff_idx = 0;
}
}
/*
* Reset buffer descriptor as empty
*/
mpc512x_fec_rbd_clean (fec, pRbd);
}
/* Try to fill Buffer Descriptors */
out_be32(&fec->eth->r_des_active, 0x01000000);
return frame_length;
}
/********************************************************************/
int mpc512x_fec_initialize (bd_t * bis)
{
volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
mpc512x_fec_priv *fec;
struct eth_device *dev;
void * bd;
fec = (mpc512x_fec_priv *) malloc (sizeof(*fec));
dev = (struct eth_device *) malloc (sizeof(*dev));
memset (dev, 0, sizeof *dev);
fec->eth = &im->fec;
# ifndef CONFIG_FEC_10MBIT
fec->xcv_type = MII100;
# else
fec->xcv_type = MII10;
# endif
dev->priv = (void *)fec;
dev->iobase = (int)&im->fec;
dev->init = mpc512x_fec_init;
dev->halt = mpc512x_fec_halt;
dev->send = mpc512x_fec_send;
dev->recv = mpc512x_fec_recv;
sprintf (dev->name, "FEC");
eth_register (dev);
#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
miiphy_register (dev->name,
fec512x_miiphy_read, fec512x_miiphy_write);
#endif
/* Clean up space FEC's MIB and FIFO RAM ...*/
memset ((void *)&im->fec.mib, 0x00, sizeof(im->fec.mib));
memset ((void *)&im->fec.fifo, 0x00, sizeof(im->fec.fifo));
/*
* Malloc space for BDs (must be quad word-aligned)
* this pointer is lost, so cannot be freed
*/
bd = malloc (sizeof(mpc512x_buff_descs) + 0x1f);
fec->bdBase = (mpc512x_buff_descs*)((u32)bd & 0xfffffff0);
memset ((void *) bd, 0x00, sizeof(mpc512x_buff_descs) + 0x1f);
/*
* Set interrupt mask register
*/
out_be32(&fec->eth->imask, 0x00000000);
/*
* Clear FEC-Lite interrupt event register(IEVENT)
*/
out_be32(&fec->eth->ievent, 0xffffffff);
return 1;
}
/* MII-interface related functions */
/********************************************************************/
int fec512x_miiphy_read(const char *devname, u8 phyAddr, u8 regAddr, u16 *retVal)
{
volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
volatile fec512x_t *eth = &im->fec;
u32 reg; /* convenient holder for the PHY register */
u32 phy; /* convenient holder for the PHY */
int timeout = 0xffff;
/*
* reading from any PHY's register is done by properly
* programming the FEC's MII data register.
*/
reg = regAddr << FEC_MII_DATA_RA_SHIFT;
phy = phyAddr << FEC_MII_DATA_PA_SHIFT;
out_be32(&eth->mii_data, FEC_MII_DATA_ST |
FEC_MII_DATA_OP_RD |
FEC_MII_DATA_TA |
phy | reg);
/*
* wait for the related interrupt
*/
while ((timeout--) && (!(in_be32(&eth->ievent) & 0x00800000)))
;
if (timeout == 0) {
#if (DEBUG & 0x2)
printf ("Read MDIO failed...\n");
#endif
return -1;
}
/*
* clear mii interrupt bit
*/
out_be32(&eth->ievent, 0x00800000);
/*
* it's now safe to read the PHY's register
*/
*retVal = (u16) in_be32(&eth->mii_data);
return 0;
}
/********************************************************************/
int fec512x_miiphy_write(const char *devname, u8 phyAddr, u8 regAddr, u16 data)
{
volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
volatile fec512x_t *eth = &im->fec;
u32 reg; /* convenient holder for the PHY register */
u32 phy; /* convenient holder for the PHY */
int timeout = 0xffff;
reg = regAddr << FEC_MII_DATA_RA_SHIFT;
phy = phyAddr << FEC_MII_DATA_PA_SHIFT;
out_be32(&eth->mii_data, FEC_MII_DATA_ST |
FEC_MII_DATA_OP_WR |
FEC_MII_DATA_TA |
phy | reg | data);
/*
* wait for the MII interrupt
*/
while ((timeout--) && (!(in_be32(&eth->ievent) & 0x00800000)))
;
if (timeout == 0) {
#if (DEBUG & 0x2)
printf ("Write MDIO failed...\n");
#endif
return -1;
}
/*
* clear MII interrupt bit
*/
out_be32(&eth->ievent, 0x00800000);
return 0;
}