Larry Finger | 2865d42 | 2010-08-20 10:15:30 -0500 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * rtl871x_eeprom.c |
| 3 | * |
| 4 | * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved. |
| 5 | * Linux device driver for RTL8192SU |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify it |
| 8 | * under the terms of version 2 of the GNU General Public License as |
| 9 | * published by the Free Software Foundation. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 14 | * more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License along with |
| 17 | * this program; if not, write to the Free Software Foundation, Inc., |
| 18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA |
| 19 | * |
| 20 | * Modifications for inclusion into the Linux staging tree are |
| 21 | * Copyright(c) 2010 Larry Finger. All rights reserved. |
| 22 | * |
| 23 | * Contact information: |
| 24 | * WLAN FAE <wlanfae@realtek.com> |
| 25 | * Larry Finger <Larry.Finger@lwfinger.net> |
| 26 | * |
| 27 | ******************************************************************************/ |
| 28 | |
| 29 | #define _RTL871X_EEPROM_C_ |
| 30 | |
| 31 | #include "osdep_service.h" |
| 32 | #include "drv_types.h" |
| 33 | |
| 34 | static void up_clk(struct _adapter *padapter, u16 *x) |
| 35 | { |
| 36 | *x = *x | _EESK; |
| 37 | r8712_write8(padapter, EE_9346CR, (u8)*x); |
| 38 | udelay(CLOCK_RATE); |
| 39 | } |
| 40 | |
| 41 | static void down_clk(struct _adapter *padapter, u16 *x) |
| 42 | { |
| 43 | *x = *x & ~_EESK; |
| 44 | r8712_write8(padapter, EE_9346CR, (u8)*x); |
| 45 | udelay(CLOCK_RATE); |
| 46 | } |
| 47 | |
| 48 | static void shift_out_bits(struct _adapter *padapter, u16 data, u16 count) |
| 49 | { |
| 50 | u16 x, mask; |
| 51 | |
| 52 | if (padapter->bSurpriseRemoved == true) |
| 53 | goto out; |
| 54 | mask = 0x01 << (count - 1); |
| 55 | x = r8712_read8(padapter, EE_9346CR); |
| 56 | x &= ~(_EEDO | _EEDI); |
| 57 | do { |
| 58 | x &= ~_EEDI; |
| 59 | if (data & mask) |
| 60 | x |= _EEDI; |
| 61 | if (padapter->bSurpriseRemoved == true) |
| 62 | goto out; |
| 63 | r8712_write8(padapter, EE_9346CR, (u8)x); |
| 64 | udelay(CLOCK_RATE); |
| 65 | up_clk(padapter, &x); |
| 66 | down_clk(padapter, &x); |
Aya Mahfouz | bc5b749 | 2015-02-26 11:35:45 +0200 | [diff] [blame] | 67 | mask >>= 1; |
Larry Finger | 2865d42 | 2010-08-20 10:15:30 -0500 | [diff] [blame] | 68 | } while (mask); |
| 69 | if (padapter->bSurpriseRemoved == true) |
| 70 | goto out; |
| 71 | x &= ~_EEDI; |
| 72 | r8712_write8(padapter, EE_9346CR, (u8)x); |
| 73 | out:; |
| 74 | } |
| 75 | |
| 76 | static u16 shift_in_bits(struct _adapter *padapter) |
| 77 | { |
| 78 | u16 x, d = 0, i; |
| 79 | |
| 80 | if (padapter->bSurpriseRemoved == true) |
| 81 | goto out; |
| 82 | x = r8712_read8(padapter, EE_9346CR); |
| 83 | x &= ~(_EEDO | _EEDI); |
| 84 | d = 0; |
| 85 | for (i = 0; i < 16; i++) { |
Aya Mahfouz | bc5b749 | 2015-02-26 11:35:45 +0200 | [diff] [blame] | 86 | d <<= 1; |
Larry Finger | 2865d42 | 2010-08-20 10:15:30 -0500 | [diff] [blame] | 87 | up_clk(padapter, &x); |
| 88 | if (padapter->bSurpriseRemoved == true) |
| 89 | goto out; |
| 90 | x = r8712_read8(padapter, EE_9346CR); |
| 91 | x &= ~(_EEDI); |
| 92 | if (x & _EEDO) |
| 93 | d |= 1; |
| 94 | down_clk(padapter, &x); |
| 95 | } |
| 96 | out: |
| 97 | return d; |
| 98 | } |
| 99 | |
| 100 | static void standby(struct _adapter *padapter) |
| 101 | { |
| 102 | u8 x; |
| 103 | |
| 104 | x = r8712_read8(padapter, EE_9346CR); |
| 105 | x &= ~(_EECS | _EESK); |
| 106 | r8712_write8(padapter, EE_9346CR, x); |
| 107 | udelay(CLOCK_RATE); |
| 108 | x |= _EECS; |
| 109 | r8712_write8(padapter, EE_9346CR, x); |
| 110 | udelay(CLOCK_RATE); |
| 111 | } |
| 112 | |
| 113 | static u16 wait_eeprom_cmd_done(struct _adapter *padapter) |
| 114 | { |
| 115 | u8 x; |
| 116 | u16 i; |
| 117 | |
| 118 | standby(padapter); |
| 119 | for (i = 0; i < 200; i++) { |
| 120 | x = r8712_read8(padapter, EE_9346CR); |
| 121 | if (x & _EEDO) |
| 122 | return true; |
| 123 | udelay(CLOCK_RATE); |
| 124 | } |
| 125 | return false; |
| 126 | } |
| 127 | |
| 128 | static void eeprom_clean(struct _adapter *padapter) |
| 129 | { |
| 130 | u16 x; |
| 131 | |
| 132 | if (padapter->bSurpriseRemoved == true) |
| 133 | return; |
| 134 | x = r8712_read8(padapter, EE_9346CR); |
| 135 | if (padapter->bSurpriseRemoved == true) |
| 136 | return; |
| 137 | x &= ~(_EECS | _EEDI); |
| 138 | r8712_write8(padapter, EE_9346CR, (u8)x); |
| 139 | if (padapter->bSurpriseRemoved == true) |
| 140 | return; |
| 141 | up_clk(padapter, &x); |
| 142 | if (padapter->bSurpriseRemoved == true) |
| 143 | return; |
| 144 | down_clk(padapter, &x); |
| 145 | } |
| 146 | |
| 147 | void r8712_eeprom_write16(struct _adapter *padapter, u16 reg, u16 data) |
| 148 | { |
| 149 | u8 x; |
| 150 | u8 tmp8_ori, tmp8_new, tmp8_clk_ori, tmp8_clk_new; |
| 151 | |
| 152 | tmp8_ori = r8712_read8(padapter, 0x102502f1); |
| 153 | tmp8_new = tmp8_ori & 0xf7; |
| 154 | if (tmp8_ori != tmp8_new) |
| 155 | r8712_write8(padapter, 0x102502f1, tmp8_new); |
| 156 | tmp8_clk_ori = r8712_read8(padapter, 0x10250003); |
| 157 | tmp8_clk_new = tmp8_clk_ori | 0x20; |
| 158 | if (tmp8_clk_new != tmp8_clk_ori) |
| 159 | r8712_write8(padapter, 0x10250003, tmp8_clk_new); |
| 160 | x = r8712_read8(padapter, EE_9346CR); |
| 161 | x &= ~(_EEDI | _EEDO | _EESK | _EEM0); |
| 162 | x |= _EEM1 | _EECS; |
| 163 | r8712_write8(padapter, EE_9346CR, x); |
| 164 | shift_out_bits(padapter, EEPROM_EWEN_OPCODE, 5); |
| 165 | if (padapter->EepromAddressSize == 8) /*CF+ and SDIO*/ |
| 166 | shift_out_bits(padapter, 0, 6); |
| 167 | else /* USB */ |
| 168 | shift_out_bits(padapter, 0, 4); |
| 169 | standby(padapter); |
| 170 | /* Erase this particular word. Write the erase opcode and register |
| 171 | * number in that order. The opcode is 3bits in length; reg is 6 |
| 172 | * bits long. |
| 173 | */ |
| 174 | standby(padapter); |
| 175 | /* write the new word to the EEPROM |
| 176 | * send the write opcode the EEPORM |
| 177 | */ |
| 178 | shift_out_bits(padapter, EEPROM_WRITE_OPCODE, 3); |
| 179 | /* select which word in the EEPROM that we are writing to. */ |
| 180 | shift_out_bits(padapter, reg, padapter->EepromAddressSize); |
| 181 | /* write the data to the selected EEPROM word. */ |
| 182 | shift_out_bits(padapter, data, 16); |
| 183 | if (wait_eeprom_cmd_done(padapter)) { |
| 184 | standby(padapter); |
| 185 | shift_out_bits(padapter, EEPROM_EWDS_OPCODE, 5); |
| 186 | shift_out_bits(padapter, reg, 4); |
| 187 | eeprom_clean(padapter); |
| 188 | } |
| 189 | if (tmp8_clk_new != tmp8_clk_ori) |
| 190 | r8712_write8(padapter, 0x10250003, tmp8_clk_ori); |
| 191 | if (tmp8_new != tmp8_ori) |
| 192 | r8712_write8(padapter, 0x102502f1, tmp8_ori); |
| 193 | } |
| 194 | |
| 195 | u16 r8712_eeprom_read16(struct _adapter *padapter, u16 reg) /*ReadEEprom*/ |
| 196 | { |
| 197 | u16 x; |
| 198 | u16 data = 0; |
| 199 | u8 tmp8_ori, tmp8_new, tmp8_clk_ori, tmp8_clk_new; |
| 200 | |
| 201 | tmp8_ori = r8712_read8(padapter, 0x102502f1); |
| 202 | tmp8_new = tmp8_ori & 0xf7; |
| 203 | if (tmp8_ori != tmp8_new) |
| 204 | r8712_write8(padapter, 0x102502f1, tmp8_new); |
| 205 | tmp8_clk_ori = r8712_read8(padapter, 0x10250003); |
| 206 | tmp8_clk_new = tmp8_clk_ori | 0x20; |
| 207 | if (tmp8_clk_new != tmp8_clk_ori) |
| 208 | r8712_write8(padapter, 0x10250003, tmp8_clk_new); |
| 209 | if (padapter->bSurpriseRemoved == true) |
| 210 | goto out; |
| 211 | /* select EEPROM, reset bits, set _EECS */ |
| 212 | x = r8712_read8(padapter, EE_9346CR); |
| 213 | if (padapter->bSurpriseRemoved == true) |
| 214 | goto out; |
| 215 | x &= ~(_EEDI | _EEDO | _EESK | _EEM0); |
| 216 | x |= _EEM1 | _EECS; |
| 217 | r8712_write8(padapter, EE_9346CR, (unsigned char)x); |
| 218 | /* write the read opcode and register number in that order |
| 219 | * The opcode is 3bits in length, reg is 6 bits long |
| 220 | */ |
| 221 | shift_out_bits(padapter, EEPROM_READ_OPCODE, 3); |
| 222 | shift_out_bits(padapter, reg, padapter->EepromAddressSize); |
| 223 | /* Now read the data (16 bits) in from the selected EEPROM word */ |
| 224 | data = shift_in_bits(padapter); |
| 225 | eeprom_clean(padapter); |
| 226 | out: |
| 227 | if (tmp8_clk_new != tmp8_clk_ori) |
| 228 | r8712_write8(padapter, 0x10250003, tmp8_clk_ori); |
| 229 | if (tmp8_new != tmp8_ori) |
| 230 | r8712_write8(padapter, 0x102502f1, tmp8_ori); |
| 231 | return data; |
| 232 | } |
| 233 | |