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[PATCH] m68knommu: FEC driver support for the ColdFire 523x CPU family
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Add support for the FEC module in the ColdFire 532x CPU family.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Matt Waddel authored and Linus Torvalds committed Jun 28, 2006
1 parent 677177c commit 6b26529
Showing 1 changed file with 179 additions and 19 deletions.
198 changes: 179 additions & 19 deletions drivers/net/fec.c
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Original file line number Diff line number Diff line change
Expand Up @@ -51,7 +51,7 @@

#if defined(CONFIG_M523x) || defined(CONFIG_M527x) || \
defined(CONFIG_M5272) || defined(CONFIG_M528x) || \
defined(CONFIG_M520x)
defined(CONFIG_M520x) || defined(CONFIG_M532x)
#include <asm/coldfire.h>
#include <asm/mcfsim.h>
#include "fec.h"
Expand Down Expand Up @@ -80,6 +80,8 @@ static unsigned int fec_hw[] = {
(MCF_MBAR + 0x1000),
#elif defined(CONFIG_M520x)
(MCF_MBAR+0x30000),
#elif defined(CONFIG_M532x)
(MCF_MBAR+0xfc030000),
#else
&(((immap_t *)IMAP_ADDR)->im_cpm.cp_fec),
#endif
Expand Down Expand Up @@ -143,7 +145,7 @@ typedef struct {
#define TX_RING_MOD_MASK 15 /* for this to work */

#if (((RX_RING_SIZE + TX_RING_SIZE) * 8) > PAGE_SIZE)
#error "FEC: descriptor ring size contants too large"
#error "FEC: descriptor ring size constants too large"
#endif

/* Interrupt events/masks.
Expand All @@ -167,12 +169,12 @@ typedef struct {


/*
* The 5270/5271/5280/5282 RX control register also contains maximum frame
* The 5270/5271/5280/5282/532x RX control register also contains maximum frame
* size bits. Other FEC hardware does not, so we need to take that into
* account when setting it.
*/
#if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
defined(CONFIG_M520x)
defined(CONFIG_M520x) || defined(CONFIG_M532x)
#define OPT_FRAME_SIZE (PKT_MAXBUF_SIZE << 16)
#else
#define OPT_FRAME_SIZE 0
Expand Down Expand Up @@ -1216,14 +1218,15 @@ static phy_info_t const * const phy_info[] = {
};

/* ------------------------------------------------------------------------- */

#if !defined(CONFIG_M532x)
#ifdef CONFIG_RPXCLASSIC
static void
mii_link_interrupt(void *dev_id);
#else
static irqreturn_t
mii_link_interrupt(int irq, void * dev_id, struct pt_regs * regs);
#endif
#endif

#if defined(CONFIG_M5272)

Expand Down Expand Up @@ -1618,6 +1621,159 @@ static void __inline__ fec_uncache(unsigned long addr)

/* ------------------------------------------------------------------------- */

#elif defined(CONFIG_M532x)
/*
* Code specific for M532x
*/
static void __inline__ fec_request_intrs(struct net_device *dev)
{
struct fec_enet_private *fep;
int b;
static const struct idesc {
char *name;
unsigned short irq;
} *idp, id[] = {
{ "fec(TXF)", 36 },
{ "fec(TXB)", 37 },
{ "fec(TXFIFO)", 38 },
{ "fec(TXCR)", 39 },
{ "fec(RXF)", 40 },
{ "fec(RXB)", 41 },
{ "fec(MII)", 42 },
{ "fec(LC)", 43 },
{ "fec(HBERR)", 44 },
{ "fec(GRA)", 45 },
{ "fec(EBERR)", 46 },
{ "fec(BABT)", 47 },
{ "fec(BABR)", 48 },
{ NULL },
};

fep = netdev_priv(dev);
b = (fep->index) ? 128 : 64;

/* Setup interrupt handlers. */
for (idp = id; idp->name; idp++) {
if (request_irq(b+idp->irq,fec_enet_interrupt,0,idp->name,dev)!=0)
printk("FEC: Could not allocate %s IRQ(%d)!\n",
idp->name, b+idp->irq);
}

/* Unmask interrupts */
MCF_INTC0_ICR36 = 0x2;
MCF_INTC0_ICR37 = 0x2;
MCF_INTC0_ICR38 = 0x2;
MCF_INTC0_ICR39 = 0x2;
MCF_INTC0_ICR40 = 0x2;
MCF_INTC0_ICR41 = 0x2;
MCF_INTC0_ICR42 = 0x2;
MCF_INTC0_ICR43 = 0x2;
MCF_INTC0_ICR44 = 0x2;
MCF_INTC0_ICR45 = 0x2;
MCF_INTC0_ICR46 = 0x2;
MCF_INTC0_ICR47 = 0x2;
MCF_INTC0_ICR48 = 0x2;

MCF_INTC0_IMRH &= ~(
MCF_INTC_IMRH_INT_MASK36 |
MCF_INTC_IMRH_INT_MASK37 |
MCF_INTC_IMRH_INT_MASK38 |
MCF_INTC_IMRH_INT_MASK39 |
MCF_INTC_IMRH_INT_MASK40 |
MCF_INTC_IMRH_INT_MASK41 |
MCF_INTC_IMRH_INT_MASK42 |
MCF_INTC_IMRH_INT_MASK43 |
MCF_INTC_IMRH_INT_MASK44 |
MCF_INTC_IMRH_INT_MASK45 |
MCF_INTC_IMRH_INT_MASK46 |
MCF_INTC_IMRH_INT_MASK47 |
MCF_INTC_IMRH_INT_MASK48 );

/* Set up gpio outputs for MII lines */
MCF_GPIO_PAR_FECI2C |= (0 |
MCF_GPIO_PAR_FECI2C_PAR_MDC_EMDC |
MCF_GPIO_PAR_FECI2C_PAR_MDIO_EMDIO);
MCF_GPIO_PAR_FEC = (0 |
MCF_GPIO_PAR_FEC_PAR_FEC_7W_FEC |
MCF_GPIO_PAR_FEC_PAR_FEC_MII_FEC);
}

static void __inline__ fec_set_mii(struct net_device *dev, struct fec_enet_private *fep)
{
volatile fec_t *fecp;

fecp = fep->hwp;
fecp->fec_r_cntrl = OPT_FRAME_SIZE | 0x04;
fecp->fec_x_cntrl = 0x00;

/*
* Set MII speed to 2.5 MHz
*/
fep->phy_speed = ((((MCF_CLK / 2) / (2500000 / 10)) + 5) / 10) * 2;
fecp->fec_mii_speed = fep->phy_speed;

fec_restart(dev, 0);
}

static void __inline__ fec_get_mac(struct net_device *dev)
{
struct fec_enet_private *fep = netdev_priv(dev);
volatile fec_t *fecp;
unsigned char *iap, tmpaddr[ETH_ALEN];

fecp = fep->hwp;

if (FEC_FLASHMAC) {
/*
* Get MAC address from FLASH.
* If it is all 1's or 0's, use the default.
*/
iap = FEC_FLASHMAC;
if ((iap[0] == 0) && (iap[1] == 0) && (iap[2] == 0) &&
(iap[3] == 0) && (iap[4] == 0) && (iap[5] == 0))
iap = fec_mac_default;
if ((iap[0] == 0xff) && (iap[1] == 0xff) && (iap[2] == 0xff) &&
(iap[3] == 0xff) && (iap[4] == 0xff) && (iap[5] == 0xff))
iap = fec_mac_default;
} else {
*((unsigned long *) &tmpaddr[0]) = fecp->fec_addr_low;
*((unsigned short *) &tmpaddr[4]) = (fecp->fec_addr_high >> 16);
iap = &tmpaddr[0];
}

memcpy(dev->dev_addr, iap, ETH_ALEN);

/* Adjust MAC if using default MAC address */
if (iap == fec_mac_default)
dev->dev_addr[ETH_ALEN-1] = fec_mac_default[ETH_ALEN-1] + fep->index;
}

static void __inline__ fec_enable_phy_intr(void)
{
}

static void __inline__ fec_disable_phy_intr(void)
{
}

static void __inline__ fec_phy_ack_intr(void)
{
}

static void __inline__ fec_localhw_setup(void)
{
}

/*
* Do not need to make region uncached on 532x.
*/
static void __inline__ fec_uncache(unsigned long addr)
{
}

/* ------------------------------------------------------------------------- */


#else

/*
Expand Down Expand Up @@ -1985,9 +2141,12 @@ fec_enet_open(struct net_device *dev)
mii_do_cmd(dev, fep->phy->config);
mii_do_cmd(dev, phy_cmd_config); /* display configuration */

/* FIXME: use netif_carrier_{on,off} ; this polls
* until link is up which is wrong... could be
* 30 seconds or more we are trapped in here. -jgarzik
/* Poll until the PHY tells us its configuration
* (not link state).
* Request is initiated by mii_do_cmd above, but answer
* comes by interrupt.
* This should take about 25 usec per register at 2.5 MHz,
* and we read approximately 5 registers.
*/
while(!fep->sequence_done)
schedule();
Expand Down Expand Up @@ -2253,15 +2412,11 @@ int __init fec_enet_init(struct net_device *dev)
*/
fec_request_intrs(dev);

/* Clear and enable interrupts */
fecp->fec_ievent = 0xffc00000;
fecp->fec_imask = (FEC_ENET_TXF | FEC_ENET_TXB |
FEC_ENET_RXF | FEC_ENET_RXB | FEC_ENET_MII);
fecp->fec_hash_table_high = 0;
fecp->fec_hash_table_low = 0;
fecp->fec_r_buff_size = PKT_MAXBLR_SIZE;
fecp->fec_ecntrl = 2;
fecp->fec_r_des_active = 0x01000000;
fecp->fec_r_des_active = 0;

dev->base_addr = (unsigned long)fecp;

Expand All @@ -2281,6 +2436,11 @@ int __init fec_enet_init(struct net_device *dev)
/* setup MII interface */
fec_set_mii(dev, fep);

/* Clear and enable interrupts */
fecp->fec_ievent = 0xffc00000;
fecp->fec_imask = (FEC_ENET_TXF | FEC_ENET_TXB |
FEC_ENET_RXF | FEC_ENET_RXB | FEC_ENET_MII);

/* Queue up command to detect the PHY and initialize the
* remainder of the interface.
*/
Expand Down Expand Up @@ -2312,11 +2472,6 @@ fec_restart(struct net_device *dev, int duplex)
fecp->fec_ecntrl = 1;
udelay(10);

/* Enable interrupts we wish to service.
*/
fecp->fec_imask = (FEC_ENET_TXF | FEC_ENET_TXB |
FEC_ENET_RXF | FEC_ENET_RXB | FEC_ENET_MII);

/* Clear any outstanding interrupt.
*/
fecp->fec_ievent = 0xffc00000;
Expand Down Expand Up @@ -2408,7 +2563,12 @@ fec_restart(struct net_device *dev, int duplex)
/* And last, enable the transmit and receive processing.
*/
fecp->fec_ecntrl = 2;
fecp->fec_r_des_active = 0x01000000;
fecp->fec_r_des_active = 0;

/* Enable interrupts we wish to service.
*/
fecp->fec_imask = (FEC_ENET_TXF | FEC_ENET_TXB |
FEC_ENET_RXF | FEC_ENET_RXB | FEC_ENET_MII);
}

static void
Expand Down

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