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xNBA/src/drivers/net/ns83820.c
Marty Connor b41f754e3a Fix compile warnings, remove unused var
2006-09-14 17:58:23 +00:00

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/**************************************************************************
* ns83820.c: Etherboot device driver for the National Semiconductor 83820
* Written 2004 by Timothy Legge <tlegge@rogers.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Portions of this code based on:
* ns83820.c by Benjamin LaHaise with contributions
* for Linux kernel 2.4.x.
*
* Linux Driver Version 0.20, 20020610
*
* This development of this Etherboot driver was funded by:
*
* NXTV: http://www.nxtv.com/
*
* REVISION HISTORY:
* ================
*
* v1.0 02-16-2004 timlegge Initial port of Linux driver
* v1.1 02-19-2004 timlegge More rohbust transmit and poll
*
* Indent Options: indent -kr -i8
***************************************************************************/
/* to get some global routines like printf */
#include "etherboot.h"
/* to get the interface to the body of the program */
#include "nic.h"
/* to get the PCI support functions, if this is a PCI NIC */
#include <gpxe/pci.h>
#if ARCH == ia64 /* Support 64-bit addressing */
#define USE_64BIT_ADDR
#endif
//#define DDEBUG
#ifdef DDEBUG
#define dprintf(x) printf x
#else
#define dprintf(x)
#endif
#define HZ 100
/* Condensed operations for readability. */
#define virt_to_le32desc(addr) cpu_to_le32(virt_to_bus(addr))
#define le32desc_to_virt(addr) bus_to_virt(le32_to_cpu(addr))
/* NIC specific static variables go here */
/* Global parameters. See MODULE_PARM near the bottom. */
// static int ihr = 2;
static int reset_phy = 0;
static int lnksts = 0; /* CFG_LNKSTS bit polarity */
#if defined(CONFIG_HIGHMEM64G) || defined(__ia64__)
#define USE_64BIT_ADDR "+"
#endif
#if defined(USE_64BIT_ADDR)
#define TRY_DAC 1
#else
#define TRY_DAC 0
#endif
/* tunables */
#define RX_BUF_SIZE 1500 /* 8192 */
/* Must not exceed ~65000. */
#define NR_RX_DESC 64
#define NR_TX_DESC 1
/* not tunable *//* Extra 6 bytes for 64 bit alignment (divisable by 8) */
#define REAL_RX_BUF_SIZE (RX_BUF_SIZE + 14 + 6) /* rx/tx mac addr + type */
#define MIN_TX_DESC_FREE 8
/* register defines */
#define CFGCS 0x04
#define CR_TXE 0x00000001
#define CR_TXD 0x00000002
/* Ramit : Here's a tip, don't do a RXD immediately followed by an RXE
* The Receive engine skips one descriptor and moves
* onto the next one!! */
#define CR_RXE 0x00000004
#define CR_RXD 0x00000008
#define CR_TXR 0x00000010
#define CR_RXR 0x00000020
#define CR_SWI 0x00000080
#define CR_RST 0x00000100
#define PTSCR_EEBIST_FAIL 0x00000001
#define PTSCR_EEBIST_EN 0x00000002
#define PTSCR_EELOAD_EN 0x00000004
#define PTSCR_RBIST_FAIL 0x000001b8
#define PTSCR_RBIST_DONE 0x00000200
#define PTSCR_RBIST_EN 0x00000400
#define PTSCR_RBIST_RST 0x00002000
#define MEAR_EEDI 0x00000001
#define MEAR_EEDO 0x00000002
#define MEAR_EECLK 0x00000004
#define MEAR_EESEL 0x00000008
#define MEAR_MDIO 0x00000010
#define MEAR_MDDIR 0x00000020
#define MEAR_MDC 0x00000040
#define ISR_TXDESC3 0x40000000
#define ISR_TXDESC2 0x20000000
#define ISR_TXDESC1 0x10000000
#define ISR_TXDESC0 0x08000000
#define ISR_RXDESC3 0x04000000
#define ISR_RXDESC2 0x02000000
#define ISR_RXDESC1 0x01000000
#define ISR_RXDESC0 0x00800000
#define ISR_TXRCMP 0x00400000
#define ISR_RXRCMP 0x00200000
#define ISR_DPERR 0x00100000
#define ISR_SSERR 0x00080000
#define ISR_RMABT 0x00040000
#define ISR_RTABT 0x00020000
#define ISR_RXSOVR 0x00010000
#define ISR_HIBINT 0x00008000
#define ISR_PHY 0x00004000
#define ISR_PME 0x00002000
#define ISR_SWI 0x00001000
#define ISR_MIB 0x00000800
#define ISR_TXURN 0x00000400
#define ISR_TXIDLE 0x00000200
#define ISR_TXERR 0x00000100
#define ISR_TXDESC 0x00000080
#define ISR_TXOK 0x00000040
#define ISR_RXORN 0x00000020
#define ISR_RXIDLE 0x00000010
#define ISR_RXEARLY 0x00000008
#define ISR_RXERR 0x00000004
#define ISR_RXDESC 0x00000002
#define ISR_RXOK 0x00000001
#define TXCFG_CSI 0x80000000
#define TXCFG_HBI 0x40000000
#define TXCFG_MLB 0x20000000
#define TXCFG_ATP 0x10000000
#define TXCFG_ECRETRY 0x00800000
#define TXCFG_BRST_DIS 0x00080000
#define TXCFG_MXDMA1024 0x00000000
#define TXCFG_MXDMA512 0x00700000
#define TXCFG_MXDMA256 0x00600000
#define TXCFG_MXDMA128 0x00500000
#define TXCFG_MXDMA64 0x00400000
#define TXCFG_MXDMA32 0x00300000
#define TXCFG_MXDMA16 0x00200000
#define TXCFG_MXDMA8 0x00100000
#define CFG_LNKSTS 0x80000000
#define CFG_SPDSTS 0x60000000
#define CFG_SPDSTS1 0x40000000
#define CFG_SPDSTS0 0x20000000
#define CFG_DUPSTS 0x10000000
#define CFG_TBI_EN 0x01000000
#define CFG_MODE_1000 0x00400000
/* Ramit : Dont' ever use AUTO_1000, it never works and is buggy.
* Read the Phy response and then configure the MAC accordingly */
#define CFG_AUTO_1000 0x00200000
#define CFG_PINT_CTL 0x001c0000
#define CFG_PINT_DUPSTS 0x00100000
#define CFG_PINT_LNKSTS 0x00080000
#define CFG_PINT_SPDSTS 0x00040000
#define CFG_TMRTEST 0x00020000
#define CFG_MRM_DIS 0x00010000
#define CFG_MWI_DIS 0x00008000
#define CFG_T64ADDR 0x00004000
#define CFG_PCI64_DET 0x00002000
#define CFG_DATA64_EN 0x00001000
#define CFG_M64ADDR 0x00000800
#define CFG_PHY_RST 0x00000400
#define CFG_PHY_DIS 0x00000200
#define CFG_EXTSTS_EN 0x00000100
#define CFG_REQALG 0x00000080
#define CFG_SB 0x00000040
#define CFG_POW 0x00000020
#define CFG_EXD 0x00000010
#define CFG_PESEL 0x00000008
#define CFG_BROM_DIS 0x00000004
#define CFG_EXT_125 0x00000002
#define CFG_BEM 0x00000001
#define EXTSTS_UDPPKT 0x00200000
#define EXTSTS_TCPPKT 0x00080000
#define EXTSTS_IPPKT 0x00020000
#define SPDSTS_POLARITY (CFG_SPDSTS1 | CFG_SPDSTS0 | CFG_DUPSTS | (lnksts ? CFG_LNKSTS : 0))
#define MIBC_MIBS 0x00000008
#define MIBC_ACLR 0x00000004
#define MIBC_FRZ 0x00000002
#define MIBC_WRN 0x00000001
#define PCR_PSEN (1 << 31)
#define PCR_PS_MCAST (1 << 30)
#define PCR_PS_DA (1 << 29)
#define PCR_STHI_8 (3 << 23)
#define PCR_STLO_4 (1 << 23)
#define PCR_FFHI_8K (3 << 21)
#define PCR_FFLO_4K (1 << 21)
#define PCR_PAUSE_CNT 0xFFFE
#define RXCFG_AEP 0x80000000
#define RXCFG_ARP 0x40000000
#define RXCFG_STRIPCRC 0x20000000
#define RXCFG_RX_FD 0x10000000
#define RXCFG_ALP 0x08000000
#define RXCFG_AIRL 0x04000000
#define RXCFG_MXDMA512 0x00700000
#define RXCFG_DRTH 0x0000003e
#define RXCFG_DRTH0 0x00000002
#define RFCR_RFEN 0x80000000
#define RFCR_AAB 0x40000000
#define RFCR_AAM 0x20000000
#define RFCR_AAU 0x10000000
#define RFCR_APM 0x08000000
#define RFCR_APAT 0x07800000
#define RFCR_APAT3 0x04000000
#define RFCR_APAT2 0x02000000
#define RFCR_APAT1 0x01000000
#define RFCR_APAT0 0x00800000
#define RFCR_AARP 0x00400000
#define RFCR_MHEN 0x00200000
#define RFCR_UHEN 0x00100000
#define RFCR_ULM 0x00080000
#define VRCR_RUDPE 0x00000080
#define VRCR_RTCPE 0x00000040
#define VRCR_RIPE 0x00000020
#define VRCR_IPEN 0x00000010
#define VRCR_DUTF 0x00000008
#define VRCR_DVTF 0x00000004
#define VRCR_VTREN 0x00000002
#define VRCR_VTDEN 0x00000001
#define VTCR_PPCHK 0x00000008
#define VTCR_GCHK 0x00000004
#define VTCR_VPPTI 0x00000002
#define VTCR_VGTI 0x00000001
#define CR 0x00
#define CFG 0x04
#define MEAR 0x08
#define PTSCR 0x0c
#define ISR 0x10
#define IMR 0x14
#define IER 0x18
#define IHR 0x1c
#define TXDP 0x20
#define TXDP_HI 0x24
#define TXCFG 0x28
#define GPIOR 0x2c
#define RXDP 0x30
#define RXDP_HI 0x34
#define RXCFG 0x38
#define PQCR 0x3c
#define WCSR 0x40
#define PCR 0x44
#define RFCR 0x48
#define RFDR 0x4c
#define SRR 0x58
#define VRCR 0xbc
#define VTCR 0xc0
#define VDR 0xc4
#define CCSR 0xcc
#define TBICR 0xe0
#define TBISR 0xe4
#define TANAR 0xe8
#define TANLPAR 0xec
#define TANER 0xf0
#define TESR 0xf4
#define TBICR_MR_AN_ENABLE 0x00001000
#define TBICR_MR_RESTART_AN 0x00000200
#define TBISR_MR_LINK_STATUS 0x00000020
#define TBISR_MR_AN_COMPLETE 0x00000004
#define TANAR_PS2 0x00000100
#define TANAR_PS1 0x00000080
#define TANAR_HALF_DUP 0x00000040
#define TANAR_FULL_DUP 0x00000020
#define GPIOR_GP5_OE 0x00000200
#define GPIOR_GP4_OE 0x00000100
#define GPIOR_GP3_OE 0x00000080
#define GPIOR_GP2_OE 0x00000040
#define GPIOR_GP1_OE 0x00000020
#define GPIOR_GP3_OUT 0x00000004
#define GPIOR_GP1_OUT 0x00000001
#define LINK_AUTONEGOTIATE 0x01
#define LINK_DOWN 0x02
#define LINK_UP 0x04
#define __kick_rx() writel(CR_RXE, ns->base + CR)
#define kick_rx() do { \
dprintf(("kick_rx: maybe kicking\n")); \
writel(virt_to_le32desc(&rx_ring[ns->cur_rx]), ns->base + RXDP); \
if (ns->next_rx == ns->next_empty) \
printf("uh-oh: next_rx == next_empty???\n"); \
__kick_rx(); \
} while(0)
#ifdef USE_64BIT_ADDR
#define HW_ADDR_LEN 8
#else
#define HW_ADDR_LEN 4
#endif
#define CMDSTS_OWN 0x80000000
#define CMDSTS_MORE 0x40000000
#define CMDSTS_INTR 0x20000000
#define CMDSTS_ERR 0x10000000
#define CMDSTS_OK 0x08000000
#define CMDSTS_LEN_MASK 0x0000ffff
#define CMDSTS_DEST_MASK 0x01800000
#define CMDSTS_DEST_SELF 0x00800000
#define CMDSTS_DEST_MULTI 0x01000000
#define DESC_SIZE 8 /* Should be cache line sized */
#ifdef USE_64BIT_ADDR
struct ring_desc {
uint64_t link;
uint64_t bufptr;
u32 cmdsts;
u32 extsts; /* Extended status field */
};
#else
struct ring_desc {
u32 link;
u32 bufptr;
u32 cmdsts;
u32 extsts; /* Extended status field */
};
#endif
/* Private Storage for the NIC */
struct ns83820_private {
u8 *base;
int up;
long idle;
u32 *next_rx_desc;
u16 next_rx, next_empty;
u32 cur_rx;
u32 *descs;
unsigned ihr;
u32 CFG_cache;
u32 MEAR_cache;
u32 IMR_cache;
int linkstate;
u16 tx_done_idx;
u16 tx_idx;
u16 tx_intr_idx;
u32 phy_descs;
u32 *tx_descs;
} nsx;
static struct ns83820_private *ns;
/* Define the TX and RX Descriptor and Buffers */
struct {
struct ring_desc tx_ring[NR_TX_DESC] __attribute__ ((aligned(8)));
unsigned char txb[NR_TX_DESC * REAL_RX_BUF_SIZE];
struct ring_desc rx_ring[NR_RX_DESC] __attribute__ ((aligned(8)));
unsigned char rxb[NR_RX_DESC * REAL_RX_BUF_SIZE]
__attribute__ ((aligned(8)));
} ns83820_bufs __shared;
#define tx_ring ns83820_bufs.tx_ring
#define rx_ring ns83820_bufs.rx_ring
#define txb ns83820_bufs.txb
#define rxb ns83820_bufs.rxb
static void phy_intr(struct nic *nic __unused)
{
static char *speeds[] =
{ "10", "100", "1000", "1000(?)", "1000F" };
u32 cfg, new_cfg;
u32 tbisr, tanar, tanlpar;
int speed, fullduplex, newlinkstate;
cfg = readl(ns->base + CFG) ^ SPDSTS_POLARITY;
if (ns->CFG_cache & CFG_TBI_EN) {
/* we have an optical transceiver */
tbisr = readl(ns->base + TBISR);
tanar = readl(ns->base + TANAR);
tanlpar = readl(ns->base + TANLPAR);
dprintf(("phy_intr: tbisr=%hX, tanar=%hX, tanlpar=%hX\n",
tbisr, tanar, tanlpar));
if ((fullduplex = (tanlpar & TANAR_FULL_DUP)
&& (tanar & TANAR_FULL_DUP))) {
/* both of us are full duplex */
writel(readl(ns->base + TXCFG)
| TXCFG_CSI | TXCFG_HBI | TXCFG_ATP,
ns->base + TXCFG);
writel(readl(ns->base + RXCFG) | RXCFG_RX_FD,
ns->base + RXCFG);
/* Light up full duplex LED */
writel(readl(ns->base + GPIOR) | GPIOR_GP1_OUT,
ns->base + GPIOR);
} else if (((tanlpar & TANAR_HALF_DUP)
&& (tanar & TANAR_HALF_DUP))
|| ((tanlpar & TANAR_FULL_DUP)
&& (tanar & TANAR_HALF_DUP))
|| ((tanlpar & TANAR_HALF_DUP)
&& (tanar & TANAR_FULL_DUP))) {
/* one or both of us are half duplex */
writel((readl(ns->base + TXCFG)
& ~(TXCFG_CSI | TXCFG_HBI)) | TXCFG_ATP,
ns->base + TXCFG);
writel(readl(ns->base + RXCFG) & ~RXCFG_RX_FD,
ns->base + RXCFG);
/* Turn off full duplex LED */
writel(readl(ns->base + GPIOR) & ~GPIOR_GP1_OUT,
ns->base + GPIOR);
}
speed = 4; /* 1000F */
} else {
/* we have a copper transceiver */
new_cfg =
ns->CFG_cache & ~(CFG_SB | CFG_MODE_1000 | CFG_SPDSTS);
if (cfg & CFG_SPDSTS1)
new_cfg |= CFG_MODE_1000;
else
new_cfg &= ~CFG_MODE_1000;
speed = ((cfg / CFG_SPDSTS0) & 3);
fullduplex = (cfg & CFG_DUPSTS);
if (fullduplex)
new_cfg |= CFG_SB;
if ((cfg & CFG_LNKSTS) &&
((new_cfg ^ ns->CFG_cache) & CFG_MODE_1000)) {
writel(new_cfg, ns->base + CFG);
ns->CFG_cache = new_cfg;
}
ns->CFG_cache &= ~CFG_SPDSTS;
ns->CFG_cache |= cfg & CFG_SPDSTS;
}
newlinkstate = (cfg & CFG_LNKSTS) ? LINK_UP : LINK_DOWN;
if (newlinkstate & LINK_UP && ns->linkstate != newlinkstate) {
printf("link now %s mbps, %s duplex and up.\n",
speeds[speed], fullduplex ? "full" : "half");
} else if (newlinkstate & LINK_DOWN
&& ns->linkstate != newlinkstate) {
printf("link now down.\n");
}
ns->linkstate = newlinkstate;
}
static void ns83820_set_multicast(struct nic *nic __unused);
static void ns83820_setup_rx(struct nic *nic)
{
unsigned i;
ns->idle = 1;
ns->next_rx = 0;
ns->next_rx_desc = ns->descs;
ns->next_empty = 0;
ns->cur_rx = 0;
for (i = 0; i < NR_RX_DESC; i++) {
rx_ring[i].link = virt_to_le32desc(&rx_ring[i + 1]);
rx_ring[i].bufptr =
virt_to_le32desc(&rxb[i * REAL_RX_BUF_SIZE]);
rx_ring[i].cmdsts = cpu_to_le32(REAL_RX_BUF_SIZE);
rx_ring[i].extsts = cpu_to_le32(0);
}
// No need to wrap the ring
// rx_ring[i].link = virt_to_le32desc(&rx_ring[0]);
writel(0, ns->base + RXDP_HI);
writel(virt_to_le32desc(&rx_ring[0]), ns->base + RXDP);
dprintf(("starting receiver\n"));
writel(0x0001, ns->base + CCSR);
writel(0, ns->base + RFCR);
writel(0x7fc00000, ns->base + RFCR);
writel(0xffc00000, ns->base + RFCR);
ns->up = 1;
phy_intr(nic);
/* Okay, let it rip */
ns->IMR_cache |= ISR_PHY;
ns->IMR_cache |= ISR_RXRCMP;
//dev->IMR_cache |= ISR_RXERR;
//dev->IMR_cache |= ISR_RXOK;
ns->IMR_cache |= ISR_RXORN;
ns->IMR_cache |= ISR_RXSOVR;
ns->IMR_cache |= ISR_RXDESC;
ns->IMR_cache |= ISR_RXIDLE;
ns->IMR_cache |= ISR_TXDESC;
ns->IMR_cache |= ISR_TXIDLE;
// No reason to enable interupts...
// writel(ns->IMR_cache, ns->base + IMR);
// writel(1, ns->base + IER);
ns83820_set_multicast(nic);
kick_rx();
}
static void ns83820_do_reset(struct nic *nic __unused, u32 which)
{
dprintf(("resetting chip...\n"));
writel(which, ns->base + CR);
do {
} while (readl(ns->base + CR) & which);
dprintf(("okay!\n"));
}
static void ns83820_reset(struct nic *nic)
{
unsigned i;
dprintf(("ns83820_reset\n"));
writel(0, ns->base + PQCR);
ns83820_setup_rx(nic);
for (i = 0; i < NR_TX_DESC; i++) {
tx_ring[i].link = 0;
tx_ring[i].bufptr = 0;
tx_ring[i].cmdsts = cpu_to_le32(0);
tx_ring[i].extsts = cpu_to_le32(0);
}
ns->tx_idx = 0;
ns->tx_done_idx = 0;
writel(0, ns->base + TXDP_HI);
return;
}
static void ns83820_getmac(struct nic *nic __unused, u8 * mac)
{
unsigned i;
for (i = 0; i < 3; i++) {
u32 data;
/* Read from the perfect match memory: this is loaded by
* the chip from the EEPROM via the EELOAD self test.
*/
writel(i * 2, ns->base + RFCR);
data = readl(ns->base + RFDR);
*mac++ = data;
*mac++ = data >> 8;
}
}
static void ns83820_set_multicast(struct nic *nic __unused)
{
u8 *rfcr = ns->base + RFCR;
u32 and_mask = 0xffffffff;
u32 or_mask = 0;
u32 val;
/* Support Multicast */
and_mask &= ~(RFCR_AAU | RFCR_AAM);
or_mask |= RFCR_AAM;
val = (readl(rfcr) & and_mask) | or_mask;
/* Ramit : RFCR Write Fix doc says RFEN must be 0 modify other bits */
writel(val & ~RFCR_RFEN, rfcr);
writel(val, rfcr);
}
static void ns83820_run_bist(struct nic *nic __unused, const char *name,
u32 enable, u32 done, u32 fail)
{
int timed_out = 0;
long start;
u32 status;
int loops = 0;
dprintf(("start %s\n", name))
start = currticks();
writel(enable, ns->base + PTSCR);
for (;;) {
loops++;
status = readl(ns->base + PTSCR);
if (!(status & enable))
break;
if (status & done)
break;
if (status & fail)
break;
if ((currticks() - start) >= HZ) {
timed_out = 1;
break;
}
}
if (status & fail)
printf("%s failed! (0x%hX & 0x%hX)\n", name, status, fail);
else if (timed_out)
printf("run_bist %s timed out! (%hX)\n", name, status);
dprintf(("done %s in %d loops\n", name, loops));
}
/*************************************
Check Link
*************************************/
static void ns83820_check_intr(struct nic *nic) {
int i;
u32 isr = readl(ns->base + ISR);
if(ISR_PHY & isr)
phy_intr(nic);
if(( ISR_RXIDLE | ISR_RXDESC | ISR_RXERR) & isr)
kick_rx();
for (i = 0; i < NR_RX_DESC; i++) {
if (rx_ring[i].cmdsts == CMDSTS_OWN) {
// rx_ring[i].link = virt_to_le32desc(&rx_ring[i + 1]);
rx_ring[i].cmdsts = cpu_to_le32(REAL_RX_BUF_SIZE);
}
}
}
/**************************************************************************
POLL - Wait for a frame
***************************************************************************/
static int ns83820_poll(struct nic *nic, int retrieve)
{
/* return true if there's an ethernet packet ready to read */
/* nic->packet should contain data on return */
/* nic->packetlen should contain length of data */
u32 cmdsts;
int entry = ns->cur_rx;
ns83820_check_intr(nic);
cmdsts = le32_to_cpu(rx_ring[entry].cmdsts);
if ( ! ( (CMDSTS_OWN & (cmdsts)) && (cmdsts != (CMDSTS_OWN)) ) )
return 0;
if ( ! retrieve ) return 1;
if (! (CMDSTS_OK & cmdsts) )
return 0;
nic->packetlen = cmdsts & 0xffff;
memcpy(nic->packet,
rxb + (entry * REAL_RX_BUF_SIZE),
nic->packetlen);
// rx_ring[entry].link = 0;
rx_ring[entry].cmdsts = cpu_to_le32(CMDSTS_OWN);
ns->cur_rx = ++ns->cur_rx % NR_RX_DESC;
if (ns->cur_rx == 0) /* We have wrapped the ring */
kick_rx();
return 1;
}
static inline void kick_tx(struct nic *nic __unused)
{
dprintf(("kick_tx\n"));
writel(CR_TXE, ns->base + CR);
}
/**************************************************************************
TRANSMIT - Transmit a frame
***************************************************************************/
static void ns83820_transmit(struct nic *nic, const char *d, /* Destination */
unsigned int t, /* Type */
unsigned int s, /* size */
const char *p)
{ /* Packet */
/* send the packet to destination */
u16 nstype;
u32 cmdsts, extsts;
int cur_tx = 0;
u32 isr = readl(ns->base + ISR);
if (ISR_TXIDLE & isr)
kick_tx(nic);
/* point to the current txb incase multiple tx_rings are used */
memcpy(txb, d, ETH_ALEN);
memcpy(txb + ETH_ALEN, nic->node_addr, ETH_ALEN);
nstype = htons((u16) t);
memcpy(txb + 2 * ETH_ALEN, (u8 *) & nstype, 2);
memcpy(txb + ETH_HLEN, p, s);
s += ETH_HLEN;
s &= 0x0FFF;
while (s < ETH_ZLEN)
txb[s++] = '\0';
/* Setup the transmit descriptor */
extsts = 0;
extsts |= EXTSTS_UDPPKT;
tx_ring[cur_tx].bufptr = virt_to_le32desc(&txb);
tx_ring[cur_tx].extsts = cpu_to_le32(extsts);
cmdsts = cpu_to_le32(0);
cmdsts |= cpu_to_le32(CMDSTS_OWN | s);
tx_ring[cur_tx].cmdsts = cpu_to_le32(cmdsts);
writel(virt_to_le32desc(&tx_ring[0]), ns->base + TXDP);
kick_tx(nic);
}
/**************************************************************************
DISABLE - Turn off ethernet interface
***************************************************************************/
static void ns83820_disable ( struct nic *nic ) {
/* put the card in its initial state */
/* This function serves 3 purposes.
* This disables DMA and interrupts so we don't receive
* unexpected packets or interrupts from the card after
* etherboot has finished.
* This frees resources so etherboot may use
* this driver on another interface
* This allows etherboot to reinitialize the interface
* if something is something goes wrong.
*/
/* disable interrupts */
writel(0, ns->base + IMR);
writel(0, ns->base + IER);
readl(ns->base + IER);
ns->up = 0;
ns83820_do_reset(nic, CR_RST);
ns->IMR_cache &=
~(ISR_RXOK | ISR_RXDESC | ISR_RXERR | ISR_RXEARLY |
ISR_RXIDLE);
writel(ns->IMR_cache, ns->base + IMR);
/* touch the pci bus... */
readl(ns->base + IMR);
/* assumes the transmitter is already disabled and reset */
writel(0, ns->base + RXDP_HI);
writel(0, ns->base + RXDP);
}
/**************************************************************************
IRQ - Enable, Disable, or Force interrupts
***************************************************************************/
static void ns83820_irq(struct nic *nic __unused, irq_action_t action __unused)
{
switch ( action ) {
case DISABLE :
break;
case ENABLE :
break;
case FORCE :
break;
}
}
static struct nic_operations ns83820_operations = {
.connect = dummy_connect,
.poll = ns83820_poll,
.transmit = ns83820_transmit,
.irq = ns83820_irq,
};
static struct pci_device_id ns83820_nics[] = {
PCI_ROM(0x100b, 0x0022, "ns83820", "National Semiconductor 83820"),
};
PCI_DRIVER ( ns83820_driver, ns83820_nics, PCI_NO_CLASS );
/**************************************************************************
PROBE - Look for an adapter, this routine's visible to the outside
***************************************************************************/
#define board_found 1
#define valid_link 0
static int ns83820_probe ( struct nic *nic, struct pci_device *pci ) {
long addr;
int using_dac = 0;
if (pci->ioaddr == 0)
return 0;
printf("ns83820.c: Found %s, vendor=0x%hX, device=0x%hX\n",
pci->name, pci->vendor, pci->device);
/* point to private storage */
ns = &nsx;
adjust_pci_device(pci);
addr = pci_bar_start(pci, PCI_BASE_ADDRESS_1);
ns->base = ioremap(addr, (1UL << 12));
if (!ns->base)
return 0;
nic->irqno = 0;
pci_fill_nic ( nic, pci );
nic->ioaddr = pci->ioaddr & ~3;
/* disable interrupts */
writel(0, ns->base + IMR);
writel(0, ns->base + IER);
readl(ns->base + IER);
ns->IMR_cache = 0;
ns83820_do_reset(nic, CR_RST);
/* Must reset the ram bist before running it */
writel(PTSCR_RBIST_RST, ns->base + PTSCR);
ns83820_run_bist(nic, "sram bist", PTSCR_RBIST_EN,
PTSCR_RBIST_DONE, PTSCR_RBIST_FAIL);
ns83820_run_bist(nic, "eeprom bist", PTSCR_EEBIST_EN, 0,
PTSCR_EEBIST_FAIL);
ns83820_run_bist(nic, "eeprom load", PTSCR_EELOAD_EN, 0, 0);
/* I love config registers */
ns->CFG_cache = readl(ns->base + CFG);
if ((ns->CFG_cache & CFG_PCI64_DET)) {
printf("%s: detected 64 bit PCI data bus.\n", pci->name);
/*dev->CFG_cache |= CFG_DATA64_EN; */
if (!(ns->CFG_cache & CFG_DATA64_EN))
printf
("%s: EEPROM did not enable 64 bit bus. Disabled.\n",
pci->name);
} else
ns->CFG_cache &= ~(CFG_DATA64_EN);
ns->CFG_cache &= (CFG_TBI_EN | CFG_MRM_DIS | CFG_MWI_DIS |
CFG_T64ADDR | CFG_DATA64_EN | CFG_EXT_125 |
CFG_M64ADDR);
ns->CFG_cache |=
CFG_PINT_DUPSTS | CFG_PINT_LNKSTS | CFG_PINT_SPDSTS |
CFG_EXTSTS_EN | CFG_EXD | CFG_PESEL;
ns->CFG_cache |= CFG_REQALG;
ns->CFG_cache |= CFG_POW;
ns->CFG_cache |= CFG_TMRTEST;
/* When compiled with 64 bit addressing, we must always enable
* the 64 bit descriptor format.
*/
#ifdef USE_64BIT_ADDR
ns->CFG_cache |= CFG_M64ADDR;
#endif
//FIXME: Enable section on dac or remove this
if (using_dac)
ns->CFG_cache |= CFG_T64ADDR;
/* Big endian mode does not seem to do what the docs suggest */
ns->CFG_cache &= ~CFG_BEM;
/* setup optical transceiver if we have one */
if (ns->CFG_cache & CFG_TBI_EN) {
dprintf(("%s: enabling optical transceiver\n", pci->name));
writel(readl(ns->base + GPIOR) | 0x3e8, ns->base + GPIOR);
/* setup auto negotiation feature advertisement */
writel(readl(ns->base + TANAR)
| TANAR_HALF_DUP | TANAR_FULL_DUP,
ns->base + TANAR);
/* start auto negotiation */
writel(TBICR_MR_AN_ENABLE | TBICR_MR_RESTART_AN,
ns->base + TBICR);
writel(TBICR_MR_AN_ENABLE, ns->base + TBICR);
ns->linkstate = LINK_AUTONEGOTIATE;
ns->CFG_cache |= CFG_MODE_1000;
}
writel(ns->CFG_cache, ns->base + CFG);
dprintf(("CFG: %hX\n", ns->CFG_cache));
/* FIXME: reset_phy is defaulted to 0, should we reset anyway? */
if (reset_phy) {
dprintf(("%s: resetting phy\n", pci->name));
writel(ns->CFG_cache | CFG_PHY_RST, ns->base + CFG);
writel(ns->CFG_cache, ns->base + CFG);
}
#if 0 /* Huh? This sets the PCI latency register. Should be done via
* the PCI layer. FIXME.
*/
if (readl(dev->base + SRR))
writel(readl(dev->base + 0x20c) | 0xfe00,
dev->base + 0x20c);
#endif
/* Note! The DMA burst size interacts with packet
* transmission, such that the largest packet that
* can be transmitted is 8192 - FLTH - burst size.
* If only the transmit fifo was larger...
*/
/* Ramit : 1024 DMA is not a good idea, it ends up banging
* some DELL and COMPAQ SMP systems */
writel(TXCFG_CSI | TXCFG_HBI | TXCFG_ATP | TXCFG_MXDMA512
| ((1600 / 32) * 0x100), ns->base + TXCFG);
/* Set Rx to full duplex, don't accept runt, errored, long or length
* range errored packets. Use 512 byte DMA.
*/
/* Ramit : 1024 DMA is not a good idea, it ends up banging
* some DELL and COMPAQ SMP systems
* Turn on ALP, only we are accpeting Jumbo Packets */
writel(RXCFG_AEP | RXCFG_ARP | RXCFG_AIRL | RXCFG_RX_FD
| RXCFG_STRIPCRC
//| RXCFG_ALP
| (RXCFG_MXDMA512) | 0, ns->base + RXCFG);
/* Disable priority queueing */
writel(0, ns->base + PQCR);
/* Enable IP checksum validation and detetion of VLAN headers.
* Note: do not set the reject options as at least the 0x102
* revision of the chip does not properly accept IP fragments
* at least for UDP.
*/
/* Ramit : Be sure to turn on RXCFG_ARP if VLAN's are enabled, since
* the MAC it calculates the packetsize AFTER stripping the VLAN
* header, and if a VLAN Tagged packet of 64 bytes is received (like
* a ping with a VLAN header) then the card, strips the 4 byte VLAN
* tag and then checks the packet size, so if RXCFG_ARP is not enabled,
* it discrards it!. These guys......
*/
writel(VRCR_IPEN | VRCR_VTDEN, ns->base + VRCR);
/* Enable per-packet TCP/UDP/IP checksumming */
writel(VTCR_PPCHK, ns->base + VTCR);
/* Ramit : Enable async and sync pause frames */
// writel(0, ns->base + PCR);
writel((PCR_PS_MCAST | PCR_PS_DA | PCR_PSEN | PCR_FFLO_4K |
PCR_FFHI_8K | PCR_STLO_4 | PCR_STHI_8 | PCR_PAUSE_CNT),
ns->base + PCR);
/* Disable Wake On Lan */
writel(0, ns->base + WCSR);
ns83820_getmac(nic, nic->node_addr);
if (using_dac) {
dprintf(("%s: using 64 bit addressing.\n", pci->name));
}
dprintf(("%s: DP83820 %d.%d: %! io=0x%hX\n",
pci->name,
(unsigned) readl(ns->base + SRR) >> 8,
(unsigned) readl(ns->base + SRR) & 0xff,
nic->node_addr, pci->ioaddr));
#ifdef PHY_CODE_IS_FINISHED
ns83820_probe_phy(dev);
#endif
ns83820_reset(nic);
/* point to NIC specific routines */
nic->nic_op = &ns83820_operations;
return 1;
}
DRIVER ( "NS83820/PCI", nic_driver, pci_driver, ns83820_driver,
ns83820_probe, ns83820_disable );
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