kernel-ark/drivers/net/tulip/eeprom.c
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

358 lines
12 KiB
C

/*
drivers/net/tulip/eeprom.c
Maintained by Jeff Garzik <jgarzik@pobox.com>
Copyright 2000,2001 The Linux Kernel Team
Written/copyright 1994-2001 by Donald Becker.
This software may be used and distributed according to the terms
of the GNU General Public License, incorporated herein by reference.
Please refer to Documentation/DocBook/tulip-user.{pdf,ps,html}
for more information on this driver, or visit the project
Web page at http://sourceforge.net/projects/tulip/
*/
#include <linux/pci.h>
#include "tulip.h"
#include <linux/init.h>
#include <asm/unaligned.h>
/* Serial EEPROM section. */
/* The main routine to parse the very complicated SROM structure.
Search www.digital.com for "21X4 SROM" to get details.
This code is very complex, and will require changes to support
additional cards, so I'll be verbose about what is going on.
*/
/* Known cards that have old-style EEPROMs. */
static struct eeprom_fixup eeprom_fixups[] __devinitdata = {
{"Asante", 0, 0, 0x94, {0x1e00, 0x0000, 0x0800, 0x0100, 0x018c,
0x0000, 0x0000, 0xe078, 0x0001, 0x0050, 0x0018 }},
{"SMC9332DST", 0, 0, 0xC0, { 0x1e00, 0x0000, 0x0800, 0x041f,
0x0000, 0x009E, /* 10baseT */
0x0004, 0x009E, /* 10baseT-FD */
0x0903, 0x006D, /* 100baseTx */
0x0905, 0x006D, /* 100baseTx-FD */ }},
{"Cogent EM100", 0, 0, 0x92, { 0x1e00, 0x0000, 0x0800, 0x063f,
0x0107, 0x8021, /* 100baseFx */
0x0108, 0x8021, /* 100baseFx-FD */
0x0100, 0x009E, /* 10baseT */
0x0104, 0x009E, /* 10baseT-FD */
0x0103, 0x006D, /* 100baseTx */
0x0105, 0x006D, /* 100baseTx-FD */ }},
{"Maxtech NX-110", 0, 0, 0xE8, { 0x1e00, 0x0000, 0x0800, 0x0513,
0x1001, 0x009E, /* 10base2, CSR12 0x10*/
0x0000, 0x009E, /* 10baseT */
0x0004, 0x009E, /* 10baseT-FD */
0x0303, 0x006D, /* 100baseTx, CSR12 0x03 */
0x0305, 0x006D, /* 100baseTx-FD CSR12 0x03 */}},
{"Accton EN1207", 0, 0, 0xE8, { 0x1e00, 0x0000, 0x0800, 0x051F,
0x1B01, 0x0000, /* 10base2, CSR12 0x1B */
0x0B00, 0x009E, /* 10baseT, CSR12 0x0B */
0x0B04, 0x009E, /* 10baseT-FD,CSR12 0x0B */
0x1B03, 0x006D, /* 100baseTx, CSR12 0x1B */
0x1B05, 0x006D, /* 100baseTx-FD CSR12 0x1B */
}},
{"NetWinder", 0x00, 0x10, 0x57,
/* Default media = MII
* MII block, reset sequence (3) = 0x0821 0x0000 0x0001, capabilities 0x01e1
*/
{ 0x1e00, 0x0000, 0x000b, 0x8f01, 0x0103, 0x0300, 0x0821, 0x000, 0x0001, 0x0000, 0x01e1 }
},
{NULL}};
static const char *block_name[] __devinitdata = {
"21140 non-MII",
"21140 MII PHY",
"21142 Serial PHY",
"21142 MII PHY",
"21143 SYM PHY",
"21143 reset method"
};
/**
* tulip_build_fake_mediatable - Build a fake mediatable entry.
* @tp: Ptr to the tulip private data.
*
* Some cards like the 3x5 HSC cards (J3514A) do not have a standard
* srom and can not be handled under the fixup routine. These cards
* still need a valid mediatable entry for correct csr12 setup and
* mii handling.
*
* Since this is currently a parisc-linux specific function, the
* #ifdef __hppa__ should completely optimize this function away for
* non-parisc hardware.
*/
static void __devinit tulip_build_fake_mediatable(struct tulip_private *tp)
{
#ifdef CONFIG_GSC
if (tp->flags & NEEDS_FAKE_MEDIA_TABLE) {
static unsigned char leafdata[] =
{ 0x01, /* phy number */
0x02, /* gpr setup sequence length */
0x02, 0x00, /* gpr setup sequence */
0x02, /* phy reset sequence length */
0x01, 0x00, /* phy reset sequence */
0x00, 0x78, /* media capabilities */
0x00, 0xe0, /* nway advertisment */
0x00, 0x05, /* fdx bit map */
0x00, 0x06 /* ttm bit map */
};
tp->mtable = (struct mediatable *)
kmalloc(sizeof(struct mediatable) + sizeof(struct medialeaf), GFP_KERNEL);
if (tp->mtable == NULL)
return; /* Horrible, impossible failure. */
tp->mtable->defaultmedia = 0x800;
tp->mtable->leafcount = 1;
tp->mtable->csr12dir = 0x3f; /* inputs on bit7 for hsc-pci, bit6 for pci-fx */
tp->mtable->has_nonmii = 0;
tp->mtable->has_reset = 0;
tp->mtable->has_mii = 1;
tp->mtable->csr15dir = tp->mtable->csr15val = 0;
tp->mtable->mleaf[0].type = 1;
tp->mtable->mleaf[0].media = 11;
tp->mtable->mleaf[0].leafdata = &leafdata[0];
tp->flags |= HAS_PHY_IRQ;
tp->csr12_shadow = -1;
}
#endif
}
void __devinit tulip_parse_eeprom(struct net_device *dev)
{
/* The last media info list parsed, for multiport boards. */
static struct mediatable *last_mediatable;
static unsigned char *last_ee_data;
static int controller_index;
struct tulip_private *tp = netdev_priv(dev);
unsigned char *ee_data = tp->eeprom;
int i;
tp->mtable = NULL;
/* Detect an old-style (SA only) EEPROM layout:
memcmp(eedata, eedata+16, 8). */
for (i = 0; i < 8; i ++)
if (ee_data[i] != ee_data[16+i])
break;
if (i >= 8) {
if (ee_data[0] == 0xff) {
if (last_mediatable) {
controller_index++;
printk(KERN_INFO "%s: Controller %d of multiport board.\n",
dev->name, controller_index);
tp->mtable = last_mediatable;
ee_data = last_ee_data;
goto subsequent_board;
} else
printk(KERN_INFO "%s: Missing EEPROM, this interface may "
"not work correctly!\n",
dev->name);
return;
}
/* Do a fix-up based on the vendor half of the station address prefix. */
for (i = 0; eeprom_fixups[i].name; i++) {
if (dev->dev_addr[0] == eeprom_fixups[i].addr0
&& dev->dev_addr[1] == eeprom_fixups[i].addr1
&& dev->dev_addr[2] == eeprom_fixups[i].addr2) {
if (dev->dev_addr[2] == 0xE8 && ee_data[0x1a] == 0x55)
i++; /* An Accton EN1207, not an outlaw Maxtech. */
memcpy(ee_data + 26, eeprom_fixups[i].newtable,
sizeof(eeprom_fixups[i].newtable));
printk(KERN_INFO "%s: Old format EEPROM on '%s' board. Using"
" substitute media control info.\n",
dev->name, eeprom_fixups[i].name);
break;
}
}
if (eeprom_fixups[i].name == NULL) { /* No fixup found. */
printk(KERN_INFO "%s: Old style EEPROM with no media selection "
"information.\n",
dev->name);
return;
}
}
controller_index = 0;
if (ee_data[19] > 1) { /* Multiport board. */
last_ee_data = ee_data;
}
subsequent_board:
if (ee_data[27] == 0) { /* No valid media table. */
tulip_build_fake_mediatable(tp);
} else {
unsigned char *p = (void *)ee_data + ee_data[27];
unsigned char csr12dir = 0;
int count, new_advertise = 0;
struct mediatable *mtable;
u16 media = get_u16(p);
p += 2;
if (tp->flags & CSR12_IN_SROM)
csr12dir = *p++;
count = *p++;
/* there is no phy information, don't even try to build mtable */
if (count == 0) {
if (tulip_debug > 0)
printk(KERN_WARNING "%s: no phy info, aborting mtable build\n", dev->name);
return;
}
mtable = (struct mediatable *)
kmalloc(sizeof(struct mediatable) + count*sizeof(struct medialeaf),
GFP_KERNEL);
if (mtable == NULL)
return; /* Horrible, impossible failure. */
last_mediatable = tp->mtable = mtable;
mtable->defaultmedia = media;
mtable->leafcount = count;
mtable->csr12dir = csr12dir;
mtable->has_nonmii = mtable->has_mii = mtable->has_reset = 0;
mtable->csr15dir = mtable->csr15val = 0;
printk(KERN_INFO "%s: EEPROM default media type %s.\n", dev->name,
media & 0x0800 ? "Autosense" : medianame[media & MEDIA_MASK]);
for (i = 0; i < count; i++) {
struct medialeaf *leaf = &mtable->mleaf[i];
if ((p[0] & 0x80) == 0) { /* 21140 Compact block. */
leaf->type = 0;
leaf->media = p[0] & 0x3f;
leaf->leafdata = p;
if ((p[2] & 0x61) == 0x01) /* Bogus, but Znyx boards do it. */
mtable->has_mii = 1;
p += 4;
} else {
leaf->type = p[1];
if (p[1] == 0x05) {
mtable->has_reset = i;
leaf->media = p[2] & 0x0f;
} else if (tp->chip_id == DM910X && p[1] == 0x80) {
/* Hack to ignore Davicom delay period block */
mtable->leafcount--;
count--;
i--;
leaf->leafdata = p + 2;
p += (p[0] & 0x3f) + 1;
continue;
} else if (p[1] & 1) {
int gpr_len, reset_len;
mtable->has_mii = 1;
leaf->media = 11;
gpr_len=p[3]*2;
reset_len=p[4+gpr_len]*2;
new_advertise |= get_u16(&p[7+gpr_len+reset_len]);
} else {
mtable->has_nonmii = 1;
leaf->media = p[2] & MEDIA_MASK;
/* Davicom's media number for 100BaseTX is strange */
if (tp->chip_id == DM910X && leaf->media == 1)
leaf->media = 3;
switch (leaf->media) {
case 0: new_advertise |= 0x0020; break;
case 4: new_advertise |= 0x0040; break;
case 3: new_advertise |= 0x0080; break;
case 5: new_advertise |= 0x0100; break;
case 6: new_advertise |= 0x0200; break;
}
if (p[1] == 2 && leaf->media == 0) {
if (p[2] & 0x40) {
u32 base15 = get_unaligned((u16*)&p[7]);
mtable->csr15dir =
(get_unaligned((u16*)&p[9])<<16) + base15;
mtable->csr15val =
(get_unaligned((u16*)&p[11])<<16) + base15;
} else {
mtable->csr15dir = get_unaligned((u16*)&p[3])<<16;
mtable->csr15val = get_unaligned((u16*)&p[5])<<16;
}
}
}
leaf->leafdata = p + 2;
p += (p[0] & 0x3f) + 1;
}
if (tulip_debug > 1 && leaf->media == 11) {
unsigned char *bp = leaf->leafdata;
printk(KERN_INFO "%s: MII interface PHY %d, setup/reset "
"sequences %d/%d long, capabilities %2.2x %2.2x.\n",
dev->name, bp[0], bp[1], bp[2 + bp[1]*2],
bp[5 + bp[2 + bp[1]*2]*2], bp[4 + bp[2 + bp[1]*2]*2]);
}
printk(KERN_INFO "%s: Index #%d - Media %s (#%d) described "
"by a %s (%d) block.\n",
dev->name, i, medianame[leaf->media & 15], leaf->media,
leaf->type < ARRAY_SIZE(block_name) ? block_name[leaf->type] : "<unknown>",
leaf->type);
}
if (new_advertise)
tp->sym_advertise = new_advertise;
}
}
/* Reading a serial EEPROM is a "bit" grungy, but we work our way through:->.*/
/* EEPROM_Ctrl bits. */
#define EE_SHIFT_CLK 0x02 /* EEPROM shift clock. */
#define EE_CS 0x01 /* EEPROM chip select. */
#define EE_DATA_WRITE 0x04 /* Data from the Tulip to EEPROM. */
#define EE_WRITE_0 0x01
#define EE_WRITE_1 0x05
#define EE_DATA_READ 0x08 /* Data from the EEPROM chip. */
#define EE_ENB (0x4800 | EE_CS)
/* Delay between EEPROM clock transitions.
Even at 33Mhz current PCI implementations don't overrun the EEPROM clock.
We add a bus turn-around to insure that this remains true. */
#define eeprom_delay() ioread32(ee_addr)
/* The EEPROM commands include the alway-set leading bit. */
#define EE_READ_CMD (6)
/* Note: this routine returns extra data bits for size detection. */
int __devinit tulip_read_eeprom(struct net_device *dev, int location, int addr_len)
{
int i;
unsigned retval = 0;
struct tulip_private *tp = dev->priv;
void __iomem *ee_addr = tp->base_addr + CSR9;
int read_cmd = location | (EE_READ_CMD << addr_len);
iowrite32(EE_ENB & ~EE_CS, ee_addr);
iowrite32(EE_ENB, ee_addr);
/* Shift the read command bits out. */
for (i = 4 + addr_len; i >= 0; i--) {
short dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0;
iowrite32(EE_ENB | dataval, ee_addr);
eeprom_delay();
iowrite32(EE_ENB | dataval | EE_SHIFT_CLK, ee_addr);
eeprom_delay();
retval = (retval << 1) | ((ioread32(ee_addr) & EE_DATA_READ) ? 1 : 0);
}
iowrite32(EE_ENB, ee_addr);
eeprom_delay();
for (i = 16; i > 0; i--) {
iowrite32(EE_ENB | EE_SHIFT_CLK, ee_addr);
eeprom_delay();
retval = (retval << 1) | ((ioread32(ee_addr) & EE_DATA_READ) ? 1 : 0);
iowrite32(EE_ENB, ee_addr);
eeprom_delay();
}
/* Terminate the EEPROM access. */
iowrite32(EE_ENB & ~EE_CS, ee_addr);
return (tp->flags & HAS_SWAPPED_SEEPROM) ? swab16(retval) : retval;
}