eeprom.c
上传用户:lgb322
上传日期:2013-02-24
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文件大小:10k
- /*
- drivers/net/tulip/eeprom.c
- Maintained by Jeff Garzik <jgarzik@mandrakesoft.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.{pdf,ps,html}
- for more information on this driver, or visit the project
- Web page at http://sourceforge.net/projects/tulip/
- */
- #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 }
- },
- {0, 0, 0, 0, {}}};
- static const char *block_name[] __devinitdata = {
- "21140 non-MII",
- "21140 MII PHY",
- "21142 Serial PHY",
- "21142 MII PHY",
- "21143 SYM PHY",
- "21143 reset method"
- };
- 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 = (struct tulip_private *)dev->priv;
- unsigned char *ee_data = tp->eeprom;
- int i;
- tp->mtable = 0;
- /* 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. */
- } else if (tp->chip_id == DC21041) {
- unsigned char *p = (void *)ee_data + ee_data[27 + controller_index*3];
- int media = get_u16(p);
- int count = p[2];
- p += 3;
- printk(KERN_INFO "%s: 21041 Media table, default media %4.4x (%s).n",
- dev->name, media,
- media & 0x0800 ? "Autosense" : medianame[media & MEDIA_MASK]);
- for (i = 0; i < count; i++) {
- unsigned char media_block = *p++;
- int media_code = media_block & MEDIA_MASK;
- if (media_block & 0x40)
- p += 6;
- printk(KERN_INFO "%s: 21041 media #%d, %s.n",
- dev->name, media_code, medianame[media_code]);
- }
- } 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 buildn", 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() inl(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(long ioaddr, int location, int addr_len)
- {
- int i;
- unsigned retval = 0;
- long ee_addr = ioaddr + CSR9;
- int read_cmd = location | (EE_READ_CMD << addr_len);
- outl(EE_ENB & ~EE_CS, ee_addr);
- outl(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;
- outl(EE_ENB | dataval, ee_addr);
- eeprom_delay();
- outl(EE_ENB | dataval | EE_SHIFT_CLK, ee_addr);
- eeprom_delay();
- retval = (retval << 1) | ((inl(ee_addr) & EE_DATA_READ) ? 1 : 0);
- }
- outl(EE_ENB, ee_addr);
- eeprom_delay();
- for (i = 16; i > 0; i--) {
- outl(EE_ENB | EE_SHIFT_CLK, ee_addr);
- eeprom_delay();
- retval = (retval << 1) | ((inl(ee_addr) & EE_DATA_READ) ? 1 : 0);
- outl(EE_ENB, ee_addr);
- eeprom_delay();
- }
- /* Terminate the EEPROM access. */
- outl(EE_ENB & ~EE_CS, ee_addr);
- return retval;
- }