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u-boot/drivers/net/mpc8xx_fec.c
Simon Glass db41d65a97 common: Move hang() to the same header as panic() 
At present panic() is in the vsprintf.h header file. That does not seem
like an obvious choice for hang(), even though it relates to panic(). So
let's put hang() in its own header.

Signed-off-by: Simon Glass <sjg@chromium.org>
[trini: Migrate a few more files]
Signed-off-by: Tom Rini <trini@konsulko.com>
2020-01-17 17:53:40 -05:00

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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2000
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*/
#include <common.h>
#include <command.h>
#include <hang.h>
#include <malloc.h>
#include <net.h>
#include <netdev.h>
#include <asm/cpm_8xx.h>
#include <asm/io.h>
#include <phy.h>
#include <linux/mii.h>
DECLARE_GLOBAL_DATA_PTR;
/* define WANT_MII when MII support is required */
#if defined(CONFIG_SYS_DISCOVER_PHY) || defined(CONFIG_FEC1_PHY) || defined(CONFIG_FEC2_PHY)
#define WANT_MII
#else
#undef WANT_MII
#endif
#if defined(WANT_MII)
#include <miiphy.h>
#if !(defined(CONFIG_MII) || defined(CONFIG_CMD_MII))
#error "CONFIG_MII has to be defined!"
#endif
#endif
#if defined(CONFIG_RMII) && !defined(WANT_MII)
#error RMII support is unusable without a working PHY.
#endif
#ifdef CONFIG_SYS_DISCOVER_PHY
static int mii_discover_phy(struct eth_device *dev);
#endif
int fec8xx_miiphy_read(struct mii_dev *bus, int addr, int devad, int reg);
int fec8xx_miiphy_write(struct mii_dev *bus, int addr, int devad, int reg,
u16 value);
static struct ether_fcc_info_s
{
int ether_index;
int fecp_offset;
int phy_addr;
int actual_phy_addr;
int initialized;
}
ether_fcc_info[] = {
#if defined(CONFIG_ETHER_ON_FEC1)
{
0,
offsetof(immap_t, im_cpm.cp_fec1),
CONFIG_FEC1_PHY,
-1,
0,
},
#endif
#if defined(CONFIG_ETHER_ON_FEC2)
{
1,
offsetof(immap_t, im_cpm.cp_fec2),
CONFIG_FEC2_PHY,
-1,
0,
},
#endif
};
/* Ethernet Transmit and Receive Buffers */
#define DBUF_LENGTH 1520
#define TX_BUF_CNT 2
#define TOUT_LOOP 100
#define PKT_MAXBUF_SIZE 1518
#define PKT_MINBUF_SIZE 64
#define PKT_MAXBLR_SIZE 1520
#ifdef __GNUC__
static char txbuf[DBUF_LENGTH] __aligned(8);
#else
#error txbuf must be aligned.
#endif
static uint rxIdx; /* index of the current RX buffer */
static uint txIdx; /* index of the current TX buffer */
/*
* FEC Ethernet Tx and Rx buffer descriptors allocated at the
* immr->udata_bd address on Dual-Port RAM
* Provide for Double Buffering
*/
struct common_buf_desc {
cbd_t rxbd[PKTBUFSRX]; /* Rx BD */
cbd_t txbd[TX_BUF_CNT]; /* Tx BD */
};
static struct common_buf_desc __iomem *rtx;
static int fec_send(struct eth_device *dev, void *packet, int length);
static int fec_recv(struct eth_device *dev);
static int fec_init(struct eth_device *dev, bd_t *bd);
static void fec_halt(struct eth_device *dev);
#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
static void __mii_init(void);
#endif
int fec_initialize(bd_t *bis)
{
struct eth_device *dev;
struct ether_fcc_info_s *efis;
int i;
for (i = 0; i < ARRAY_SIZE(ether_fcc_info); i++) {
dev = malloc(sizeof(*dev));
if (dev == NULL)
hang();
memset(dev, 0, sizeof(*dev));
/* for FEC1 make sure that the name of the interface is the same
as the old one for compatibility reasons */
if (i == 0)
strcpy(dev->name, "FEC");
else
sprintf(dev->name, "FEC%d",
ether_fcc_info[i].ether_index + 1);
efis = &ether_fcc_info[i];
/*
* reset actual phy addr
*/
efis->actual_phy_addr = -1;
dev->priv = efis;
dev->init = fec_init;
dev->halt = fec_halt;
dev->send = fec_send;
dev->recv = fec_recv;
eth_register(dev);
#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
int retval;
struct mii_dev *mdiodev = mdio_alloc();
if (!mdiodev)
return -ENOMEM;
strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
mdiodev->read = fec8xx_miiphy_read;
mdiodev->write = fec8xx_miiphy_write;
retval = mdio_register(mdiodev);
if (retval < 0)
return retval;
#endif
}
return 1;
}
static int fec_send(struct eth_device *dev, void *packet, int length)
{
int j, rc;
struct ether_fcc_info_s *efis = dev->priv;
fec_t __iomem *fecp =
(fec_t __iomem *)(CONFIG_SYS_IMMR + efis->fecp_offset);
/* section 16.9.23.3
* Wait for ready
*/
j = 0;
while ((in_be16(&rtx->txbd[txIdx].cbd_sc) & BD_ENET_TX_READY) &&
(j < TOUT_LOOP)) {
udelay(1);
j++;
}
if (j >= TOUT_LOOP)
printf("TX not ready\n");
out_be32(&rtx->txbd[txIdx].cbd_bufaddr, (uint)packet);
out_be16(&rtx->txbd[txIdx].cbd_datlen, length);
setbits_be16(&rtx->txbd[txIdx].cbd_sc,
BD_ENET_TX_READY | BD_ENET_TX_LAST);
/* Activate transmit Buffer Descriptor polling */
/* Descriptor polling active */
out_be32(&fecp->fec_x_des_active, 0x01000000);
j = 0;
while ((in_be16(&rtx->txbd[txIdx].cbd_sc) & BD_ENET_TX_READY) &&
(j < TOUT_LOOP)) {
udelay(1);
j++;
}
if (j >= TOUT_LOOP)
printf("TX timeout\n");
/* return only status bits */;
rc = in_be16(&rtx->txbd[txIdx].cbd_sc) & BD_ENET_TX_STATS;
txIdx = (txIdx + 1) % TX_BUF_CNT;
return rc;
}
static int fec_recv(struct eth_device *dev)
{
struct ether_fcc_info_s *efis = dev->priv;
fec_t __iomem *fecp =
(fec_t __iomem *)(CONFIG_SYS_IMMR + efis->fecp_offset);
int length;
for (;;) {
/* section 16.9.23.2 */
if (in_be16(&rtx->rxbd[rxIdx].cbd_sc) & BD_ENET_RX_EMPTY) {
length = -1;
break; /* nothing received - leave for() loop */
}
length = in_be16(&rtx->rxbd[rxIdx].cbd_datlen);
if (!(in_be16(&rtx->rxbd[rxIdx].cbd_sc) & 0x003f)) {
uchar *rx = net_rx_packets[rxIdx];
length -= 4;
#if defined(CONFIG_CMD_CDP)
if ((rx[0] & 1) != 0 &&
memcmp((uchar *)rx, net_bcast_ethaddr, 6) != 0 &&
!is_cdp_packet((uchar *)rx))
rx = NULL;
#endif
/*
* Pass the packet up to the protocol layers.
*/
if (rx != NULL)
net_process_received_packet(rx, length);
}
/* Give the buffer back to the FEC. */
out_be16(&rtx->rxbd[rxIdx].cbd_datlen, 0);
/* wrap around buffer index when necessary */
if ((rxIdx + 1) >= PKTBUFSRX) {
out_be16(&rtx->rxbd[PKTBUFSRX - 1].cbd_sc,
BD_ENET_RX_WRAP | BD_ENET_RX_EMPTY);
rxIdx = 0;
} else {
out_be16(&rtx->rxbd[rxIdx].cbd_sc, BD_ENET_RX_EMPTY);
rxIdx++;
}
/* Try to fill Buffer Descriptors */
/* Descriptor polling active */
out_be32(&fecp->fec_r_des_active, 0x01000000);
}
return length;
}
/**************************************************************
*
* FEC Ethernet Initialization Routine
*
*************************************************************/
#define FEC_ECNTRL_PINMUX 0x00000004
#define FEC_ECNTRL_ETHER_EN 0x00000002
#define FEC_ECNTRL_RESET 0x00000001
#define FEC_RCNTRL_BC_REJ 0x00000010
#define FEC_RCNTRL_PROM 0x00000008
#define FEC_RCNTRL_MII_MODE 0x00000004
#define FEC_RCNTRL_DRT 0x00000002
#define FEC_RCNTRL_LOOP 0x00000001
#define FEC_TCNTRL_FDEN 0x00000004
#define FEC_TCNTRL_HBC 0x00000002
#define FEC_TCNTRL_GTS 0x00000001
#define FEC_RESET_DELAY 50
#if defined(CONFIG_RMII)
static inline void fec_10Mbps(struct eth_device *dev)
{
struct ether_fcc_info_s *efis = dev->priv;
int fecidx = efis->ether_index;
uint mask = (fecidx == 0) ? 0x0000010 : 0x0000008;
immap_t __iomem *immr = (immap_t __iomem *)CONFIG_SYS_IMMR;
if ((unsigned int)fecidx >= 2)
hang();
setbits_be32(&immr->im_cpm.cp_cptr, mask);
}
static inline void fec_100Mbps(struct eth_device *dev)
{
struct ether_fcc_info_s *efis = dev->priv;
int fecidx = efis->ether_index;
uint mask = (fecidx == 0) ? 0x0000010 : 0x0000008;
immap_t __iomem *immr = (immap_t __iomem *)CONFIG_SYS_IMMR;
if ((unsigned int)fecidx >= 2)
hang();
clrbits_be32(&immr->im_cpm.cp_cptr, mask);
}
#endif
static inline void fec_full_duplex(struct eth_device *dev)
{
struct ether_fcc_info_s *efis = dev->priv;
fec_t __iomem *fecp =
(fec_t __iomem *)(CONFIG_SYS_IMMR + efis->fecp_offset);
clrbits_be32(&fecp->fec_r_cntrl, FEC_RCNTRL_DRT);
setbits_be32(&fecp->fec_x_cntrl, FEC_TCNTRL_FDEN); /* FD enable */
}
static inline void fec_half_duplex(struct eth_device *dev)
{
struct ether_fcc_info_s *efis = dev->priv;
fec_t __iomem *fecp =
(fec_t __iomem *)(CONFIG_SYS_IMMR + efis->fecp_offset);
setbits_be32(&fecp->fec_r_cntrl, FEC_RCNTRL_DRT);
clrbits_be32(&fecp->fec_x_cntrl, FEC_TCNTRL_FDEN); /* FD disable */
}
static void fec_pin_init(int fecidx)
{
bd_t *bd = gd->bd;
immap_t __iomem *immr = (immap_t __iomem *)CONFIG_SYS_IMMR;
/*
* Set MII speed to 2.5 MHz or slightly below.
*
* According to the MPC860T (Rev. D) Fast ethernet controller user
* manual (6.2.14),
* the MII management interface clock must be less than or equal
* to 2.5 MHz.
* This MDC frequency is equal to system clock / (2 * MII_SPEED).
* Then MII_SPEED = system_clock / 2 * 2,5 MHz.
*
* All MII configuration is done via FEC1 registers:
*/
out_be32(&immr->im_cpm.cp_fec1.fec_mii_speed,
((bd->bi_intfreq + 4999999) / 5000000) << 1);
#if defined(CONFIG_MPC885) && defined(WANT_MII)
/* use MDC for MII */
setbits_be16(&immr->im_ioport.iop_pdpar, 0x0080);
clrbits_be16(&immr->im_ioport.iop_pddir, 0x0080);
#endif
if (fecidx == 0) {
#if defined(CONFIG_ETHER_ON_FEC1)
#if defined(CONFIG_MPC885) /* MPC87x/88x have got 2 FECs and different pinout */
#if !defined(CONFIG_RMII)
setbits_be16(&immr->im_ioport.iop_papar, 0xf830);
setbits_be16(&immr->im_ioport.iop_padir, 0x0830);
clrbits_be16(&immr->im_ioport.iop_padir, 0xf000);
setbits_be32(&immr->im_cpm.cp_pbpar, 0x00001001);
clrbits_be32(&immr->im_cpm.cp_pbdir, 0x00001001);
setbits_be16(&immr->im_ioport.iop_pcpar, 0x000c);
clrbits_be16(&immr->im_ioport.iop_pcdir, 0x000c);
setbits_be32(&immr->im_cpm.cp_pepar, 0x00000003);
setbits_be32(&immr->im_cpm.cp_pedir, 0x00000003);
clrbits_be32(&immr->im_cpm.cp_peso, 0x00000003);
clrbits_be32(&immr->im_cpm.cp_cptr, 0x00000100);
#else
#if !defined(CONFIG_FEC1_PHY_NORXERR)
setbits_be16(&immr->im_ioport.iop_papar, 0x1000);
clrbits_be16(&immr->im_ioport.iop_padir, 0x1000);
#endif
setbits_be16(&immr->im_ioport.iop_papar, 0xe810);
setbits_be16(&immr->im_ioport.iop_padir, 0x0810);
clrbits_be16(&immr->im_ioport.iop_padir, 0xe000);
setbits_be32(&immr->im_cpm.cp_pbpar, 0x00000001);
clrbits_be32(&immr->im_cpm.cp_pbdir, 0x00000001);
setbits_be32(&immr->im_cpm.cp_cptr, 0x00000100);
clrbits_be32(&immr->im_cpm.cp_cptr, 0x00000050);
#endif /* !CONFIG_RMII */
#else
/*
* Configure all of port D for MII.
*/
out_be16(&immr->im_ioport.iop_pdpar, 0x1fff);
out_be16(&immr->im_ioport.iop_pddir, 0x1fff);
#if defined(CONFIG_TARGET_MCR3000)
out_be16(&immr->im_ioport.iop_papar, 0xBBFF);
out_be16(&immr->im_ioport.iop_padir, 0x04F0);
out_be16(&immr->im_ioport.iop_paodr, 0x0000);
out_be32(&immr->im_cpm.cp_pbpar, 0x000133FF);
out_be32(&immr->im_cpm.cp_pbdir, 0x0003BF0F);
out_be16(&immr->im_cpm.cp_pbodr, 0x0000);
out_be16(&immr->im_ioport.iop_pcpar, 0x0400);
out_be16(&immr->im_ioport.iop_pcdir, 0x0080);
out_be16(&immr->im_ioport.iop_pcso , 0x0D53);
out_be16(&immr->im_ioport.iop_pcint, 0x0000);
out_be16(&immr->im_ioport.iop_pdpar, 0x03FE);
out_be16(&immr->im_ioport.iop_pddir, 0x1C09);
setbits_be32(&immr->im_ioport.utmode, 0x80);
#endif
#endif
#endif /* CONFIG_ETHER_ON_FEC1 */
} else if (fecidx == 1) {
#if defined(CONFIG_ETHER_ON_FEC2)
#if defined(CONFIG_MPC885) /* MPC87x/88x have got 2 FECs and different pinout */
#if !defined(CONFIG_RMII)
setbits_be32(&immr->im_cpm.cp_pepar, 0x0003fffc);
setbits_be32(&immr->im_cpm.cp_pedir, 0x0003fffc);
clrbits_be32(&immr->im_cpm.cp_peso, 0x000087fc);
setbits_be32(&immr->im_cpm.cp_peso, 0x00037800);
clrbits_be32(&immr->im_cpm.cp_cptr, 0x00000080);
#else
#if !defined(CONFIG_FEC2_PHY_NORXERR)
setbits_be32(&immr->im_cpm.cp_pepar, 0x00000010);
setbits_be32(&immr->im_cpm.cp_pedir, 0x00000010);
clrbits_be32(&immr->im_cpm.cp_peso, 0x00000010);
#endif
setbits_be32(&immr->im_cpm.cp_pepar, 0x00039620);
setbits_be32(&immr->im_cpm.cp_pedir, 0x00039620);
setbits_be32(&immr->im_cpm.cp_peso, 0x00031000);
clrbits_be32(&immr->im_cpm.cp_peso, 0x00008620);
setbits_be32(&immr->im_cpm.cp_cptr, 0x00000080);
clrbits_be32(&immr->im_cpm.cp_cptr, 0x00000028);
#endif /* CONFIG_RMII */
#endif /* CONFIG_MPC885 */
#endif /* CONFIG_ETHER_ON_FEC2 */
}
}
static int fec_reset(fec_t __iomem *fecp)
{
int i;
/* Whack a reset.
* A delay is required between a reset of the FEC block and
* initialization of other FEC registers because the reset takes
* some time to complete. If you don't delay, subsequent writes
* to FEC registers might get killed by the reset routine which is
* still in progress.
*/
out_be32(&fecp->fec_ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_RESET);
for (i = 0; (in_be32(&fecp->fec_ecntrl) & FEC_ECNTRL_RESET) &&
(i < FEC_RESET_DELAY); ++i)
udelay(1);
if (i == FEC_RESET_DELAY)
return -1;
return 0;
}
static int fec_init(struct eth_device *dev, bd_t *bd)
{
struct ether_fcc_info_s *efis = dev->priv;
immap_t __iomem *immr = (immap_t __iomem *)CONFIG_SYS_IMMR;
fec_t __iomem *fecp =
(fec_t __iomem *)(CONFIG_SYS_IMMR + efis->fecp_offset);
int i;
#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
/* the MII interface is connected to FEC1
* so for the miiphy_xxx function to work we must
* call mii_init since fec_halt messes the thing up
*/
if (efis->ether_index != 0)
__mii_init();
#endif
if (fec_reset(fecp) < 0)
printf("FEC_RESET_DELAY timeout\n");
/* We use strictly polling mode only
*/
out_be32(&fecp->fec_imask, 0);
/* Clear any pending interrupt
*/
out_be32(&fecp->fec_ievent, 0xffc0);
/* No need to set the IVEC register */
/* Set station address
*/
#define ea dev->enetaddr
out_be32(&fecp->fec_addr_low, (ea[0] << 24) | (ea[1] << 16) |
(ea[2] << 8) | ea[3]);
out_be16(&fecp->fec_addr_high, (ea[4] << 8) | ea[5]);
#undef ea
#if defined(CONFIG_CMD_CDP)
/*
* Turn on multicast address hash table
*/
out_be32(&fecp->fec_hash_table_high, 0xffffffff);
out_be32(&fecp->fec_hash_table_low, 0xffffffff);
#else
/* Clear multicast address hash table
*/
out_be32(&fecp->fec_hash_table_high, 0);
out_be32(&fecp->fec_hash_table_low, 0);
#endif
/* Set maximum receive buffer size.
*/
out_be32(&fecp->fec_r_buff_size, PKT_MAXBLR_SIZE);
/* Set maximum frame length
*/
out_be32(&fecp->fec_r_hash, PKT_MAXBUF_SIZE);
/*
* Setup Buffers and Buffer Descriptors
*/
rxIdx = 0;
txIdx = 0;
if (!rtx)
rtx = (struct common_buf_desc __iomem *)
(immr->im_cpm.cp_dpmem + CPM_FEC_BASE);
/*
* Setup Receiver Buffer Descriptors (13.14.24.18)
* Settings:
* Empty, Wrap
*/
for (i = 0; i < PKTBUFSRX; i++) {
out_be16(&rtx->rxbd[i].cbd_sc, BD_ENET_RX_EMPTY);
out_be16(&rtx->rxbd[i].cbd_datlen, 0); /* Reset */
out_be32(&rtx->rxbd[i].cbd_bufaddr, (uint)net_rx_packets[i]);
}
setbits_be16(&rtx->rxbd[PKTBUFSRX - 1].cbd_sc, BD_ENET_RX_WRAP);
/*
* Setup Ethernet Transmitter Buffer Descriptors (13.14.24.19)
* Settings:
* Last, Tx CRC
*/
for (i = 0; i < TX_BUF_CNT; i++) {
out_be16(&rtx->txbd[i].cbd_sc, BD_ENET_TX_LAST | BD_ENET_TX_TC);
out_be16(&rtx->txbd[i].cbd_datlen, 0); /* Reset */
out_be32(&rtx->txbd[i].cbd_bufaddr, (uint)txbuf);
}
setbits_be16(&rtx->txbd[TX_BUF_CNT - 1].cbd_sc, BD_ENET_TX_WRAP);
/* Set receive and transmit descriptor base
*/
out_be32(&fecp->fec_r_des_start, (__force unsigned int)rtx->rxbd);
out_be32(&fecp->fec_x_des_start, (__force unsigned int)rtx->txbd);
/* Enable MII mode
*/
/* Half duplex mode */
out_be32(&fecp->fec_r_cntrl, FEC_RCNTRL_MII_MODE | FEC_RCNTRL_DRT);
out_be32(&fecp->fec_x_cntrl, 0);
/* Enable big endian and don't care about SDMA FC.
*/
out_be32(&fecp->fec_fun_code, 0x78000000);
/*
* Setup the pin configuration of the FEC
*/
fec_pin_init(efis->ether_index);
rxIdx = 0;
txIdx = 0;
/*
* Now enable the transmit and receive processing
*/
out_be32(&fecp->fec_ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
if (efis->phy_addr == -1) {
#ifdef CONFIG_SYS_DISCOVER_PHY
/*
* wait for the PHY to wake up after reset
*/
efis->actual_phy_addr = mii_discover_phy(dev);
if (efis->actual_phy_addr == -1) {
printf("Unable to discover phy!\n");
return -1;
}
#else
efis->actual_phy_addr = -1;
#endif
} else {
efis->actual_phy_addr = efis->phy_addr;
}
#if defined(CONFIG_MII) && defined(CONFIG_RMII)
/*
* adapt the RMII speed to the speed of the phy
*/
if (miiphy_speed(dev->name, efis->actual_phy_addr) == _100BASET)
fec_100Mbps(dev);
else
fec_10Mbps(dev);
#endif
#if defined(CONFIG_MII)
/*
* adapt to the half/full speed settings
*/
if (miiphy_duplex(dev->name, efis->actual_phy_addr) == FULL)
fec_full_duplex(dev);
else
fec_half_duplex(dev);
#endif
/* And last, try to fill Rx Buffer Descriptors */
/* Descriptor polling active */
out_be32(&fecp->fec_r_des_active, 0x01000000);
efis->initialized = 1;
return 0;
}
static void fec_halt(struct eth_device *dev)
{
struct ether_fcc_info_s *efis = dev->priv;
fec_t __iomem *fecp =
(fec_t __iomem *)(CONFIG_SYS_IMMR + efis->fecp_offset);
int i;
/* avoid halt if initialized; mii gets stuck otherwise */
if (!efis->initialized)
return;
/* Whack a reset.
* A delay is required between a reset of the FEC block and
* initialization of other FEC registers because the reset takes
* some time to complete. If you don't delay, subsequent writes
* to FEC registers might get killed by the reset routine which is
* still in progress.
*/
out_be32(&fecp->fec_ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_RESET);
for (i = 0; (in_be32(&fecp->fec_ecntrl) & FEC_ECNTRL_RESET) &&
(i < FEC_RESET_DELAY); ++i)
udelay(1);
if (i == FEC_RESET_DELAY) {
printf("FEC_RESET_DELAY timeout\n");
return;
}
efis->initialized = 0;
}
#if defined(CONFIG_SYS_DISCOVER_PHY) || defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
/* Make MII read/write commands for the FEC.
*/
#define mk_mii_read(ADDR, REG) (0x60020000 | ((ADDR << 23) | \
(REG & 0x1f) << 18))
#define mk_mii_write(ADDR, REG, VAL) (0x50020000 | ((ADDR << 23) | \
(REG & 0x1f) << 18) | \
(VAL & 0xffff))
/* Interrupt events/masks.
*/
#define FEC_ENET_HBERR ((uint)0x80000000) /* Heartbeat error */
#define FEC_ENET_BABR ((uint)0x40000000) /* Babbling receiver */
#define FEC_ENET_BABT ((uint)0x20000000) /* Babbling transmitter */
#define FEC_ENET_GRA ((uint)0x10000000) /* Graceful stop complete */
#define FEC_ENET_TXF ((uint)0x08000000) /* Full frame transmitted */
#define FEC_ENET_TXB ((uint)0x04000000) /* A buffer was transmitted */
#define FEC_ENET_RXF ((uint)0x02000000) /* Full frame received */
#define FEC_ENET_RXB ((uint)0x01000000) /* A buffer was received */
#define FEC_ENET_MII ((uint)0x00800000) /* MII interrupt */
#define FEC_ENET_EBERR ((uint)0x00400000) /* SDMA bus error */
/* send command to phy using mii, wait for result */
static uint
mii_send(uint mii_cmd)
{
uint mii_reply;
fec_t __iomem *ep;
int cnt;
immap_t __iomem *immr = (immap_t __iomem *)CONFIG_SYS_IMMR;
ep = &immr->im_cpm.cp_fec;
out_be32(&ep->fec_mii_data, mii_cmd); /* command to phy */
/* wait for mii complete */
cnt = 0;
while (!(in_be32(&ep->fec_ievent) & FEC_ENET_MII)) {
if (++cnt > 1000) {
printf("mii_send STUCK!\n");
break;
}
}
mii_reply = in_be32(&ep->fec_mii_data); /* result from phy */
out_be32(&ep->fec_ievent, FEC_ENET_MII); /* clear MII complete */
return mii_reply & 0xffff; /* data read from phy */
}
#endif
#if defined(CONFIG_SYS_DISCOVER_PHY)
static int mii_discover_phy(struct eth_device *dev)
{
#define MAX_PHY_PASSES 11
uint phyno;
int pass;
uint phytype;
int phyaddr;
phyaddr = -1; /* didn't find a PHY yet */
for (pass = 1; pass <= MAX_PHY_PASSES && phyaddr < 0; ++pass) {
if (pass > 1) {
/* PHY may need more time to recover from reset.
* The LXT970 needs 50ms typical, no maximum is
* specified, so wait 10ms before try again.
* With 11 passes this gives it 100ms to wake up.
*/
udelay(10000); /* wait 10ms */
}
for (phyno = 0; phyno < 32 && phyaddr < 0; ++phyno) {
phytype = mii_send(mk_mii_read(phyno, MII_PHYSID2));
if (phytype != 0xffff) {
phyaddr = phyno;
phytype |= mii_send(mk_mii_read(phyno,
MII_PHYSID1)) << 16;
}
}
}
if (phyaddr < 0)
printf("No PHY device found.\n");
return phyaddr;
}
#endif /* CONFIG_SYS_DISCOVER_PHY */
#if (defined(CONFIG_MII) || defined(CONFIG_CMD_MII)) && !defined(CONFIG_BITBANGMII)
/****************************************************************************
* mii_init -- Initialize the MII via FEC 1 for MII command without ethernet
* This function is a subset of eth_init
****************************************************************************
*/
static void __mii_init(void)
{
immap_t __iomem *immr = (immap_t __iomem *)CONFIG_SYS_IMMR;
fec_t __iomem *fecp = &immr->im_cpm.cp_fec;
if (fec_reset(fecp) < 0)
printf("FEC_RESET_DELAY timeout\n");
/* We use strictly polling mode only
*/
out_be32(&fecp->fec_imask, 0);
/* Clear any pending interrupt
*/
out_be32(&fecp->fec_ievent, 0xffc0);
/* Now enable the transmit and receive processing
*/
out_be32(&fecp->fec_ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
}
void mii_init(void)
{
int i;
__mii_init();
/* Setup the pin configuration of the FEC(s)
*/
for (i = 0; i < ARRAY_SIZE(ether_fcc_info); i++)
fec_pin_init(ether_fcc_info[i].ether_index);
}
/*****************************************************************************
* Read and write a MII PHY register, routines used by MII Utilities
*
* FIXME: These routines are expected to return 0 on success, but mii_send
* does _not_ return an error code. Maybe 0xFFFF means error, i.e.
* no PHY connected...
* For now always return 0.
* FIXME: These routines only work after calling eth_init() at least once!
* Otherwise they hang in mii_send() !!! Sorry!
*****************************************************************************/
int fec8xx_miiphy_read(struct mii_dev *bus, int addr, int devad, int reg)
{
unsigned short value = 0;
short rdreg; /* register working value */
rdreg = mii_send(mk_mii_read(addr, reg));
value = rdreg;
return value;
}
int fec8xx_miiphy_write(struct mii_dev *bus, int addr, int devad, int reg,
u16 value)
{
(void)mii_send(mk_mii_write(addr, reg, value));
return 0;
}
#endif
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