diff options
Diffstat (limited to 'drivers/staging/rtl8712/rtl871x_eeprom.c')
| -rw-r--r-- | drivers/staging/rtl8712/rtl871x_eeprom.c | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/drivers/staging/rtl8712/rtl871x_eeprom.c b/drivers/staging/rtl8712/rtl871x_eeprom.c new file mode 100644 index 0000000..2f145d6 --- /dev/null +++ b/drivers/staging/rtl8712/rtl871x_eeprom.c @@ -0,0 +1,233 @@ +/****************************************************************************** + * rtl871x_eeprom.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 _RTL871X_EEPROM_C_ + +#include "osdep_service.h" +#include "drv_types.h" + +static void up_clk(struct _adapter *padapter, u16 *x) +{ + *x = *x | _EESK; + r8712_write8(padapter, EE_9346CR, (u8)*x); + udelay(CLOCK_RATE); +} + +static void down_clk(struct _adapter *padapter, u16 *x) +{ + *x = *x & ~_EESK; + r8712_write8(padapter, EE_9346CR, (u8)*x); + udelay(CLOCK_RATE); +} + +static void shift_out_bits(struct _adapter *padapter, u16 data, u16 count) +{ + u16 x, mask; + + if (padapter->bSurpriseRemoved == true) + goto out; + mask = 0x01 << (count - 1); + x = r8712_read8(padapter, EE_9346CR); + x &= ~(_EEDO | _EEDI); + do { + x &= ~_EEDI; + if (data & mask) + x |= _EEDI; + if (padapter->bSurpriseRemoved == true) + goto out; + r8712_write8(padapter, EE_9346CR, (u8)x); + udelay(CLOCK_RATE); + up_clk(padapter, &x); + down_clk(padapter, &x); + mask = mask >> 1; + } while (mask); + if (padapter->bSurpriseRemoved == true) + goto out; + x &= ~_EEDI; + r8712_write8(padapter, EE_9346CR, (u8)x); +out:; +} + +static u16 shift_in_bits(struct _adapter *padapter) +{ + u16 x, d = 0, i; + + if (padapter->bSurpriseRemoved == true) + goto out; + x = r8712_read8(padapter, EE_9346CR); + x &= ~(_EEDO | _EEDI); + d = 0; + for (i = 0; i < 16; i++) { + d = d << 1; + up_clk(padapter, &x); + if (padapter->bSurpriseRemoved == true) + goto out; + x = r8712_read8(padapter, EE_9346CR); + x &= ~(_EEDI); + if (x & _EEDO) + d |= 1; + down_clk(padapter, &x); + } +out: + return d; +} + +static void standby(struct _adapter *padapter) +{ + u8 x; + + x = r8712_read8(padapter, EE_9346CR); + x &= ~(_EECS | _EESK); + r8712_write8(padapter, EE_9346CR, x); + udelay(CLOCK_RATE); + x |= _EECS; + r8712_write8(padapter, EE_9346CR, x); + udelay(CLOCK_RATE); +} + +static u16 wait_eeprom_cmd_done(struct _adapter *padapter) +{ + u8 x; + u16 i; + + standby(padapter); + for (i = 0; i < 200; i++) { + x = r8712_read8(padapter, EE_9346CR); + if (x & _EEDO) + return true; + udelay(CLOCK_RATE); + } + return false; +} + +static void eeprom_clean(struct _adapter *padapter) +{ + u16 x; + + if (padapter->bSurpriseRemoved == true) + return; + x = r8712_read8(padapter, EE_9346CR); + if (padapter->bSurpriseRemoved == true) + return; + x &= ~(_EECS | _EEDI); + r8712_write8(padapter, EE_9346CR, (u8)x); + if (padapter->bSurpriseRemoved == true) + return; + up_clk(padapter, &x); + if (padapter->bSurpriseRemoved == true) + return; + down_clk(padapter, &x); +} + +void r8712_eeprom_write16(struct _adapter *padapter, u16 reg, u16 data) +{ + u8 x; + u8 tmp8_ori, tmp8_new, tmp8_clk_ori, tmp8_clk_new; + + tmp8_ori = r8712_read8(padapter, 0x102502f1); + tmp8_new = tmp8_ori & 0xf7; + if (tmp8_ori != tmp8_new) + r8712_write8(padapter, 0x102502f1, tmp8_new); + tmp8_clk_ori = r8712_read8(padapter, 0x10250003); + tmp8_clk_new = tmp8_clk_ori | 0x20; + if (tmp8_clk_new != tmp8_clk_ori) + r8712_write8(padapter, 0x10250003, tmp8_clk_new); + x = r8712_read8(padapter, EE_9346CR); + x &= ~(_EEDI | _EEDO | _EESK | _EEM0); + x |= _EEM1 | _EECS; + r8712_write8(padapter, EE_9346CR, x); + shift_out_bits(padapter, EEPROM_EWEN_OPCODE, 5); + if (padapter->EepromAddressSize == 8) /*CF+ and SDIO*/ + shift_out_bits(padapter, 0, 6); + else /* USB */ + shift_out_bits(padapter, 0, 4); + standby(padapter); + /* Erase this particular word. Write the erase opcode and register + * number in that order. The opcode is 3bits in length; reg is 6 + * bits long. + */ + standby(padapter); + /* write the new word to the EEPROM + * send the write opcode the EEPORM + */ + shift_out_bits(padapter, EEPROM_WRITE_OPCODE, 3); + /* select which word in the EEPROM that we are writing to. */ + shift_out_bits(padapter, reg, padapter->EepromAddressSize); + /* write the data to the selected EEPROM word. */ + shift_out_bits(padapter, data, 16); + if (wait_eeprom_cmd_done(padapter)) { + standby(padapter); + shift_out_bits(padapter, EEPROM_EWDS_OPCODE, 5); + shift_out_bits(padapter, reg, 4); + eeprom_clean(padapter); + } + if (tmp8_clk_new != tmp8_clk_ori) + r8712_write8(padapter, 0x10250003, tmp8_clk_ori); + if (tmp8_new != tmp8_ori) + r8712_write8(padapter, 0x102502f1, tmp8_ori); +} + +u16 r8712_eeprom_read16(struct _adapter *padapter, u16 reg) /*ReadEEprom*/ +{ + u16 x; + u16 data = 0; + u8 tmp8_ori, tmp8_new, tmp8_clk_ori, tmp8_clk_new; + + tmp8_ori = r8712_read8(padapter, 0x102502f1); + tmp8_new = tmp8_ori & 0xf7; + if (tmp8_ori != tmp8_new) + r8712_write8(padapter, 0x102502f1, tmp8_new); + tmp8_clk_ori = r8712_read8(padapter, 0x10250003); + tmp8_clk_new = tmp8_clk_ori | 0x20; + if (tmp8_clk_new != tmp8_clk_ori) + r8712_write8(padapter, 0x10250003, tmp8_clk_new); + if (padapter->bSurpriseRemoved == true) + goto out; + /* select EEPROM, reset bits, set _EECS */ + x = r8712_read8(padapter, EE_9346CR); + if (padapter->bSurpriseRemoved == true) + goto out; + x &= ~(_EEDI | _EEDO | _EESK | _EEM0); + x |= _EEM1 | _EECS; + r8712_write8(padapter, EE_9346CR, (unsigned char)x); + /* write the read opcode and register number in that order + * The opcode is 3bits in length, reg is 6 bits long + */ + shift_out_bits(padapter, EEPROM_READ_OPCODE, 3); + shift_out_bits(padapter, reg, padapter->EepromAddressSize); + /* Now read the data (16 bits) in from the selected EEPROM word */ + data = shift_in_bits(padapter); + eeprom_clean(padapter); +out: + if (tmp8_clk_new != tmp8_clk_ori) + r8712_write8(padapter, 0x10250003, tmp8_clk_ori); + if (tmp8_new != tmp8_ori) + r8712_write8(padapter, 0x102502f1, tmp8_ori); + return data; +} + |
