/*
* rtl8712_efuse.c
*
* Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
* Linux device driver for RTL8192SU
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
*
* Modifications for inclusion into the Linux staging tree are
* Copyright(c) 2010 Larry Finger. All rights reserved.
*
* Contact information:
* WLAN FAE <wlanfae@realtek.com>.
* Larry Finger <Larry.Finger@lwfinger.net>
*
******************************************************************************/
#define _RTL8712_EFUSE_C_
#include "osdep_service.h"
#include "drv_types.h"
#include "rtl8712_efuse.h"
/* reserve 3 bytes for HW stop read */
static int efuse_available_max_size = EFUSE_MAX_SIZE - 3 /*0x1FD*/;
static void efuse_reg_ctrl(struct _adapter *padapter, u8 bPowerOn)
{
u8 tmpu8 = 0;
if (true == bPowerOn) {
/* -----------------e-fuse pwr & clk reg ctrl ---------------
* Enable LDOE25 Macro Block
*/
tmpu8 = r8712_read8(padapter, EFUSE_TEST + 3);
tmpu8 |= 0x80;
r8712_write8(padapter, EFUSE_TEST + 3, tmpu8);
msleep(20); /* for some platform , need some delay time */
/* Change Efuse Clock for write action to 40MHZ */
r8712_write8(padapter, EFUSE_CLK_CTRL, 0x03);
msleep(20); /* for some platform , need some delay time */
} else {
/* -----------------e-fuse pwr & clk reg ctrl -----------------
* Disable LDOE25 Macro Block
*/
tmpu8 = r8712_read8(padapter, EFUSE_TEST + 3);
tmpu8 &= 0x7F;
r8712_write8(padapter, EFUSE_TEST + 3, tmpu8);
/* Change Efuse Clock for write action to 500K */
r8712_write8(padapter, EFUSE_CLK_CTRL, 0x02);
}
}
/*
* Before write E-Fuse, this function must be called.
*/
u8 r8712_efuse_reg_init(struct _adapter *padapter)
{
return true;
}
void r8712_efuse_reg_uninit(struct _adapter *padapter)
{
efuse_reg_ctrl(padapter, false);
}
static u8 efuse_one_byte_read(struct _adapter *padapter, u16 addr, u8 *data)
{
u8 tmpidx = 0, bResult;
/* -----------------e-fuse reg ctrl --------------------------------- */
r8712_write8(padapter, EFUSE_CTRL+1, (u8)(addr&0xFF)); /* address */
r8712_write8(padapter, EFUSE_CTRL+2, ((u8)((addr>>8)&0x03)) |
(r8712_read8(padapter, EFUSE_CTRL+2)&0xFC));
r8712_write8(padapter, EFUSE_CTRL+3, 0x72); /* read cmd */
/* wait for complete */
while (!(0x80 & r8712_read8(padapter, EFUSE_CTRL+3)) && (tmpidx < 100))
tmpidx++;
if (tmpidx < 100) {
*data = r8712_read8(padapter, EFUSE_CTRL);
bResult = true;
} else {
*data = 0xff;
bResult = false;
}
return bResult;
}
static u8 efuse_one_byte_write(struct _adapter *padapter, u16 addr, u8 data)
{
u8 tmpidx = 0, bResult;
/* -----------------e-fuse reg ctrl -------------------------------- */
r8712_write8(padapter, EFUSE_CTRL+1, (u8)(addr&0xFF)); /* address */
r8712_write8(padapter, EFUSE_CTRL+2, ((u8)((addr>>8)&0x03)) |
(r8712_read8(padapter, EFUSE_CTRL+2)&0xFC));
r8712_write8(padapter, EFUSE_CTRL, data); /* data */
r8712_write8(padapter, EFUSE_CTRL+3, 0xF2); /* write cmd */
/* wait for complete */
while ((0x80 & r8712_read8(padapter, EFUSE_CTRL+3)) && (tmpidx < 100))
tmpidx++;
if (tmpidx < 100)
bResult = true;
else
bResult = false;
return bResult;
}
static u8 efuse_one_byte_rw(struct _adapter *padapter, u8 bRead, u16 addr,
u8 *data)
{
u8 tmpidx = 0, tmpv8 = 0, bResult;
/* -----------------e-fuse reg ctrl --------------------------------- */
r8712_write8(padapter, EFUSE_CTRL+1, (u8)(addr&0xFF)); /* address */
tmpv8 = ((u8)((addr >> 8) & 0x03)) |
(r8712_read8(padapter, EFUSE_CTRL + 2) & 0xFC);
r8712_write8(padapter, EFUSE_CTRL+2, tmpv8);
if (true == bRead) {
r8712_write8(padapter, EFUSE_CTRL+3, 0x72); /* read cmd */
while (!(0x80 & r8712_read8(padapter, EFUSE_CTRL+3)) &&
(tmpidx < 100))
tmpidx++;
if (tmpidx < 100) {
*data = r8712_read8(padapter, EFUSE_CTRL);
bResult = true;
} else {
*data = 0;
bResult = false;
}
} else {
r8712_write8(padapter, EFUSE_CTRL, *data); /* data */
r8712_write8(padapter, EFUSE_CTRL+3, 0xF2); /* write cmd */
while ((0x80 & r8712_read8(padapter, EFUSE_CTRL+3)) &&
(tmpidx < 100))
tmpidx++;
if (tmpidx < 100)
bResult = true;
else
bResult = false;
}
return bResult;
}
static u8 efuse_is_empty(struct _adapter *padapter, u8 *empty)
{
u8 value, ret = true;
/* read one byte to check if E-Fuse is empty */
if (efuse_one_byte_rw(padapter, true, 0, &value) == true) {
if (0xFF == value)
*empty = true;
else
*empty = false;
} else
ret = false;
return ret;
}
void r8712_efuse_change_max_size(struct _adapter *padapter)
{
u16 pre_pg_data_saddr = 0x1FB;
u16 i;
u16 pre_pg_data_size = 5;
u8 pre_pg_data[5];
for (i = 0; i < pre_pg_data_size; i++)
efuse_one_byte_read(padapter, pre_pg_data_saddr + i,
&pre_pg_data[i]);
if ((pre_pg_data[0] == 0x03) && (pre_pg_data[1] == 0x00) &&
(pre_pg_data[2] == 0x00) && (pre_pg_data[3] == 0x00) &&
(pre_pg_data[4] == 0x0C))
efuse_available_max_size -= pre_pg_data_size;
}
int r8712_efuse_get_max_size(struct _adapter *padapter)
{
return efuse_available_max_size;
}
static u8 calculate_word_cnts(const u8 word_en)
{
u8 word_cnts = 0;
u8 word_idx;
for (word_idx = 0; word_idx < PGPKG_MAX_WORDS; word_idx++)
if (!(word_en & BIT(word_idx)))
word_cnts++; /* 0 : write enable */
return word_cnts;
}
static void pgpacket_copy_data(const u8 word_en, const u8 *sourdata,
u8 *targetdata)
{
u8 tmpindex = 0;
u8 word_idx, byte_idx;
for (word_idx = 0; word_idx < PGPKG_MAX_WORDS; word_idx++) {
if (!(word_en&BIT(word_idx))) {
byte_idx = word_idx * 2;
targetdata[byte_idx] = sourdata[tmpindex++];
targetdata[byte_idx + 1] = sourdata[tmpindex++];
}
}
}
u16 r8712_efuse_get_current_size(struct _adapter *padapter)
{
int bContinual = true;
u16 efuse_addr = 0;
u8 hoffset = 0, hworden = 0;
u8 efuse_data, word_cnts = 0;
while (bContinual && efuse_one_byte_read(padapter, efuse_addr,
&efuse_data) && (efuse_addr < efuse_available_max_size)) {
if (efuse_data != 0xFF) {
hoffset = (efuse_data >> 4) & 0x0F;
hworden = efuse_data & 0x0F;
word_cnts = calculate_word_cnts(hworden);
/* read next header */
efuse_addr = efuse_addr + (word_cnts * 2) + 1;
} else
bContinual = false ;
}
return efuse_addr;
}
u8 r8712_efuse_pg_packet_read(struct _adapter *padapter, u8 offset, u8 *data)
{
u8 hoffset = 0, hworden = 0, word_cnts = 0;
u16 efuse_addr = 0;
u8 efuse_data;
u8 tmpidx = 0;
u8 tmpdata[PGPKT_DATA_SIZE];
u8 ret = true;
if (data == NULL)
return false;
if (offset > 0x0f)
return false;
memset(data, 0xFF, sizeof(u8)*PGPKT_DATA_SIZE);
while (efuse_addr < efuse_available_max_size) {
if (efuse_one_byte_read(padapter, efuse_addr, &efuse_data) ==
true) {
if (efuse_data == 0xFF)
break;
hoffset = (efuse_data >> 4) & 0x0F;
hworden = efuse_data & 0x0F;
word_cnts = calculate_word_cnts(hworden);
if (hoffset == offset) {
memset(tmpdata, 0xFF, PGPKT_DATA_SIZE);
for (tmpidx = 0; tmpidx < word_cnts * 2;
tmpidx++) {
if (efuse_one_byte_read(padapter,
efuse_addr+1+tmpidx, &efuse_data) ==
true) {
tmpdata[tmpidx] = efuse_data;
} else
ret = false;
}
pgpacket_copy_data(hworden, tmpdata, data);
}
efuse_addr += 1 + (word_cnts*2);
} else {
ret = false;
break;
}
}
return ret;
}
static u8 fix_header(struct _adapter *padapter, u8 header, u16 header_addr)
{
struct PGPKT_STRUCT pkt;
u8 offset, word_en, value;
u16 addr;
int i;
u8 ret = true;
pkt.offset = GET_EFUSE_OFFSET(header);
pkt.word_en = GET_EFUSE_WORD_EN(header);
addr = header_addr + 1 + calculate_word_cnts(pkt.word_en) * 2;
if (addr > efuse_available_max_size)
return false;
/* retrieve original data */
addr = 0;
while (addr < header_addr) {
if (efuse_one_byte_read(padapter, addr++, &value) == false) {
ret = false;
break;
}
offset = GET_EFUSE_OFFSET(value);
word_en = GET_EFUSE_WORD_EN(value);
if (pkt.offset != offset) {
addr += calculate_word_cnts(word_en)*2;
continue;
}
for (i = 0; i < PGPKG_MAX_WORDS; i++) {
if (BIT(i) & word_en)
continue;
if (!(BIT(i) & pkt.word_en)) {
if (efuse_one_byte_read(padapter, addr,
&value) == true)
pkt.data[i*2] = value;
else
return false;
if (efuse_one_byte_read(padapter, addr + 1,
&value) == true)
pkt.data[i*2 + 1] = value;
else
return false;
}
addr += 2;
}
}
if (addr != header_addr)
return false;
addr++;
/* fill original data */
for (i = 0; i < PGPKG_MAX_WORDS; i++) {
if (BIT(i) & pkt.word_en)
continue;
efuse_one_byte_write(padapter, addr, pkt.data[i*2]);
efuse_one_byte_write(padapter, addr+1, pkt.data[i*2 + 1]);
/* additional check */
if (efuse_one_byte_read(padapter, addr, &value) == false)
ret = false;
else if (pkt.data[i*2] != value) {
ret = false;
if (0xFF == value) /* write again */
efuse_one_byte_write(padapter, addr,
pkt.data[i * 2]);
}
if (efuse_one_byte_read(padapter, addr+1, &value) == false)
ret = false;
else if (pkt.data[i*2 + 1] != value) {
ret = false;
if (0xFF == value) /* write again */
efuse_one_byte_write(padapter, addr+1,
pkt.data[i*2 + 1]);
}
addr += 2;
}
return ret;
}
u8 r8712_efuse_pg_packet_write(struct _adapter *padapter, const u8 offset,
const u8 word_en, const u8 *data)
{
u8 pg_header = 0;
u16 efuse_addr = 0, curr_size = 0;
u8 efuse_data, target_word_cnts = 0;
static int repeat_times;
int sub_repeat;
u8 bResult = true;
/* check if E-Fuse Clock Enable and E-Fuse Clock is 40M */
efuse_data = r8712_read8(padapter, EFUSE_CLK_CTRL);
if (efuse_data != 0x03)
return false;
pg_header = MAKE_EFUSE_HEADER(offset, word_en);
target_word_cnts = calculate_word_cnts(word_en);
repeat_times = 0;
efuse_addr = 0;
while (efuse_addr < efuse_available_max_size) {
curr_size = r8712_efuse_get_current_size(padapter);
if ((curr_size + 1 + target_word_cnts * 2) >
efuse_available_max_size)
return false; /*target_word_cnts + pg header(1 byte)*/
efuse_addr = curr_size; /* current size is also the last addr*/
efuse_one_byte_write(padapter, efuse_addr, pg_header); /*hdr*/
sub_repeat = 0;
/* check if what we read is what we write */
while (efuse_one_byte_read(padapter, efuse_addr,
&efuse_data) == false) {
if (++sub_repeat > _REPEAT_THRESHOLD_) {
bResult = false; /* continue to blind write */
break; /* continue to blind write */
}
}
if ((sub_repeat > _REPEAT_THRESHOLD_) ||
(pg_header == efuse_data)) {
/* write header ok OR can't check header(creep) */
u8 i;
/* go to next address */
efuse_addr++;
for (i = 0; i < target_word_cnts*2; i++) {
efuse_one_byte_write(padapter,
efuse_addr + i,
*(data + i));
if (efuse_one_byte_read(padapter,
efuse_addr + i, &efuse_data) == false)
bResult = false;
else if (*(data+i) != efuse_data) /* fail */
bResult = false;
}
break;
} else { /* write header fail */
bResult = false;
if (0xFF == efuse_data)
return bResult; /* not thing damaged. */
/* call rescue procedure */
if (fix_header(padapter, efuse_data, efuse_addr) ==
false)
return false; /* rescue fail */
if (++repeat_times > _REPEAT_THRESHOLD_) /* fail */
break;
/* otherwise, take another risk... */
}
}
return bResult;
}
u8 r8712_efuse_access(struct _adapter *padapter, u8 bRead, u16 start_addr,
u16 cnts, u8 *data)
{
int i;
u8 res = true;
if (start_addr > EFUSE_MAX_SIZE)
return false;
if ((bRead == false) && ((start_addr + cnts) >
efuse_available_max_size))
return false;
if ((false == bRead) && (r8712_efuse_reg_init(padapter) == false))
return false;
/* -----------------e-fuse one byte read / write ---------------------*/
for (i = 0; i < cnts; i++) {
if ((start_addr + i) > EFUSE_MAX_SIZE) {
res = false;
break;
}
res = efuse_one_byte_rw(padapter, bRead, start_addr + i,
data + i);
if ((false == bRead) && (false == res))
break;
}
if (false == bRead)
r8712_efuse_reg_uninit(padapter);
return res;
}
u8 r8712_efuse_map_read(struct _adapter *padapter, u16 addr, u16 cnts, u8 *data)
{
u8 offset, ret = true;
u8 pktdata[PGPKT_DATA_SIZE];
int i, idx;
if ((addr + cnts) > EFUSE_MAP_MAX_SIZE)
return false;
if ((efuse_is_empty(padapter, &offset) == true) && (offset ==
true)) {
for (i = 0; i < cnts; i++)
data[i] = 0xFF;
return ret;
}
offset = (addr >> 3) & 0xF;
ret = r8712_efuse_pg_packet_read(padapter, offset, pktdata);
i = addr & 0x7; /* pktdata index */
idx = 0; /* data index */
do {
for (; i < PGPKT_DATA_SIZE; i++) {
data[idx++] = pktdata[i];
if (idx == cnts)
return ret;
}
offset++;
if (!r8712_efuse_pg_packet_read(padapter, offset, pktdata))
ret = false;
i = 0;
} while (1);
return ret;
}
u8 r8712_efuse_map_write(struct _adapter *padapter, u16 addr, u16 cnts,
u8 *data)
{
u8 offset, word_en, empty;
u8 pktdata[PGPKT_DATA_SIZE], newdata[PGPKT_DATA_SIZE];
int i, j, idx;
if ((addr + cnts) > EFUSE_MAP_MAX_SIZE)
return false;
/* check if E-Fuse Clock Enable and E-Fuse Clock is 40M */
empty = r8712_read8(padapter, EFUSE_CLK_CTRL);
if (empty != 0x03)
return false;
if (efuse_is_empty(padapter, &empty) == true) {
if (true == empty)
memset(pktdata, 0xFF, PGPKT_DATA_SIZE);
} else
return false;
offset = (addr >> 3) & 0xF;
if (empty == false)
if (!r8712_efuse_pg_packet_read(padapter, offset, pktdata))
return false;
word_en = 0xF;
memset(newdata, 0xFF, PGPKT_DATA_SIZE);
i = addr & 0x7; /* pktdata index */
j = 0; /* newdata index */
idx = 0; /* data index */
if (i & 0x1) {
/* odd start */
if (data[idx] != pktdata[i]) {
word_en &= ~BIT(i >> 1);
newdata[j++] = pktdata[i - 1];
newdata[j++] = data[idx];
}
i++;
idx++;
}
do {
for (; i < PGPKT_DATA_SIZE; i += 2) {
if ((cnts - idx) == 1) {
if (data[idx] != pktdata[i]) {
word_en &= ~BIT(i >> 1);
newdata[j++] = data[idx];
newdata[j++] = pktdata[1 + 1];
}
idx++;
break;
} else {
if ((data[idx] != pktdata[i]) || (data[idx+1] !=
pktdata[i+1])) {
word_en &= ~BIT(i >> 1);
newdata[j++] = data[idx];
newdata[j++] = data[idx + 1];
}
idx += 2;
}
if (idx == cnts)
break;
}
if (word_en != 0xF)
if (r8712_efuse_pg_packet_write(padapter, offset,
word_en, newdata) == false)
return false;
if (idx == cnts)
break;
offset++;
if (empty == false)
if (!r8712_efuse_pg_packet_read(padapter, offset,
pktdata))
return false;
i = 0;
j = 0;
word_en = 0xF;
memset(newdata, 0xFF, PGPKT_DATA_SIZE);
} while (1);
return true;
}