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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 | // SPDX-License-Identifier: GPL-2.0 /****************************************************************************** * rtl871x_eeprom.c * * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved. * Linux device driver for RTL8192SU * * 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->surprise_removed) 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->surprise_removed) goto out; r8712_write8(padapter, EE_9346CR, (u8)x); udelay(CLOCK_RATE); up_clk(padapter, &x); down_clk(padapter, &x); mask >>= 1; } while (mask); if (padapter->surprise_removed) 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->surprise_removed) goto out; x = r8712_read8(padapter, EE_9346CR); x &= ~(_EEDO | _EEDI); d = 0; for (i = 0; i < 16; i++) { d <<= 1; up_clk(padapter, &x); if (padapter->surprise_removed) 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->surprise_removed) return; x = r8712_read8(padapter, EE_9346CR); if (padapter->surprise_removed) return; x &= ~(_EECS | _EEDI); r8712_write8(padapter, EE_9346CR, (u8)x); if (padapter->surprise_removed) return; up_clk(padapter, &x); if (padapter->surprise_removed) 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->eeprom_address_size == 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->eeprom_address_size); /* 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->surprise_removed) goto out; /* select EEPROM, reset bits, set _EECS */ x = r8712_read8(padapter, EE_9346CR); if (padapter->surprise_removed) 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->eeprom_address_size); /* 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; } |