Jerry Chuang | 8fc8598 | 2009-11-03 07:17:11 -0200 | [diff] [blame] | 1 | /* |
| 2 | This files contains card eeprom (93c46 or 93c56) programming routines, |
| 3 | memory is addressed by 16 bits words. |
| 4 | |
| 5 | This is part of rtl8180 OpenSource driver. |
Andrea Merello | 559a4c3 | 2013-08-26 13:53:30 +0200 | [diff] [blame] | 6 | Copyright (C) Andrea Merello 2004 <andrea.merello@gmail.com> |
Jerry Chuang | 8fc8598 | 2009-11-03 07:17:11 -0200 | [diff] [blame] | 7 | Released under the terms of GPL (General Public Licence) |
| 8 | |
| 9 | Parts of this driver are based on the GPL part of the |
| 10 | official realtek driver. |
| 11 | |
| 12 | Parts of this driver are based on the rtl8180 driver skeleton |
| 13 | from Patric Schenke & Andres Salomon. |
| 14 | |
| 15 | Parts of this driver are based on the Intel Pro Wireless 2100 GPL driver. |
| 16 | |
Justin P. Mattock | ffae305 | 2012-04-30 13:45:41 -0700 | [diff] [blame] | 17 | We want to thank the Authors of those projects and the Ndiswrapper |
Jerry Chuang | 8fc8598 | 2009-11-03 07:17:11 -0200 | [diff] [blame] | 18 | project Authors. |
| 19 | */ |
| 20 | |
| 21 | #include "r8180_93cx6.h" |
| 22 | |
Ana Rey | f6bd19e | 2014-03-13 12:36:37 +0100 | [diff] [blame] | 23 | static void eprom_cs(struct net_device *dev, short bit) |
Jerry Chuang | 8fc8598 | 2009-11-03 07:17:11 -0200 | [diff] [blame] | 24 | { |
Xenia Ragiadakou | b3d42bf | 2013-06-06 16:40:51 +0300 | [diff] [blame] | 25 | u8 cmdreg; |
Salah Triki | 2fe9262 | 2016-05-04 04:42:40 +0100 | [diff] [blame] | 26 | int err; |
Xenia Ragiadakou | b3d42bf | 2013-06-06 16:40:51 +0300 | [diff] [blame] | 27 | |
Salah Triki | 2fe9262 | 2016-05-04 04:42:40 +0100 | [diff] [blame] | 28 | err = read_nic_byte_E(dev, EPROM_CMD, &cmdreg); |
| 29 | if (err) |
| 30 | return; |
Xenia Ragiadakou | fcd9f35 | 2013-05-13 20:15:49 +0300 | [diff] [blame] | 31 | if (bit) |
Xenia Ragiadakou | b3d42bf | 2013-06-06 16:40:51 +0300 | [diff] [blame] | 32 | /* enable EPROM */ |
| 33 | write_nic_byte_E(dev, EPROM_CMD, cmdreg | EPROM_CS_BIT); |
Jerry Chuang | 8fc8598 | 2009-11-03 07:17:11 -0200 | [diff] [blame] | 34 | else |
Xenia Ragiadakou | b3d42bf | 2013-06-06 16:40:51 +0300 | [diff] [blame] | 35 | /* disable EPROM */ |
| 36 | write_nic_byte_E(dev, EPROM_CMD, cmdreg & ~EPROM_CS_BIT); |
Jerry Chuang | 8fc8598 | 2009-11-03 07:17:11 -0200 | [diff] [blame] | 37 | |
| 38 | force_pci_posting(dev); |
| 39 | udelay(EPROM_DELAY); |
| 40 | } |
| 41 | |
| 42 | |
Ana Rey | f6bd19e | 2014-03-13 12:36:37 +0100 | [diff] [blame] | 43 | static void eprom_ck_cycle(struct net_device *dev) |
Jerry Chuang | 8fc8598 | 2009-11-03 07:17:11 -0200 | [diff] [blame] | 44 | { |
Xenia Ragiadakou | b3d42bf | 2013-06-06 16:40:51 +0300 | [diff] [blame] | 45 | u8 cmdreg; |
Salah Triki | 2fe9262 | 2016-05-04 04:42:40 +0100 | [diff] [blame] | 46 | int err; |
Xenia Ragiadakou | b3d42bf | 2013-06-06 16:40:51 +0300 | [diff] [blame] | 47 | |
Salah Triki | 2fe9262 | 2016-05-04 04:42:40 +0100 | [diff] [blame] | 48 | err = read_nic_byte_E(dev, EPROM_CMD, &cmdreg); |
| 49 | if (err) |
| 50 | return; |
Xenia Ragiadakou | b3d42bf | 2013-06-06 16:40:51 +0300 | [diff] [blame] | 51 | write_nic_byte_E(dev, EPROM_CMD, cmdreg | EPROM_CK_BIT); |
Jerry Chuang | 8fc8598 | 2009-11-03 07:17:11 -0200 | [diff] [blame] | 52 | force_pci_posting(dev); |
| 53 | udelay(EPROM_DELAY); |
Xenia Ragiadakou | b3d42bf | 2013-06-06 16:40:51 +0300 | [diff] [blame] | 54 | |
| 55 | read_nic_byte_E(dev, EPROM_CMD, &cmdreg); |
| 56 | write_nic_byte_E(dev, EPROM_CMD, cmdreg & ~EPROM_CK_BIT); |
Jerry Chuang | 8fc8598 | 2009-11-03 07:17:11 -0200 | [diff] [blame] | 57 | force_pci_posting(dev); |
| 58 | udelay(EPROM_DELAY); |
| 59 | } |
| 60 | |
| 61 | |
Chaitanya Hazarey | 6371f21 | 2014-05-27 15:35:09 -0700 | [diff] [blame] | 62 | static void eprom_w(struct net_device *dev, short bit) |
Jerry Chuang | 8fc8598 | 2009-11-03 07:17:11 -0200 | [diff] [blame] | 63 | { |
Xenia Ragiadakou | b3d42bf | 2013-06-06 16:40:51 +0300 | [diff] [blame] | 64 | u8 cmdreg; |
Salah Triki | 2fe9262 | 2016-05-04 04:42:40 +0100 | [diff] [blame] | 65 | int err; |
Xenia Ragiadakou | b3d42bf | 2013-06-06 16:40:51 +0300 | [diff] [blame] | 66 | |
Salah Triki | 2fe9262 | 2016-05-04 04:42:40 +0100 | [diff] [blame] | 67 | err = read_nic_byte_E(dev, EPROM_CMD, &cmdreg); |
| 68 | if (err) |
| 69 | return; |
Xenia Ragiadakou | fcd9f35 | 2013-05-13 20:15:49 +0300 | [diff] [blame] | 70 | if (bit) |
Xenia Ragiadakou | b3d42bf | 2013-06-06 16:40:51 +0300 | [diff] [blame] | 71 | write_nic_byte_E(dev, EPROM_CMD, cmdreg | EPROM_W_BIT); |
Jerry Chuang | 8fc8598 | 2009-11-03 07:17:11 -0200 | [diff] [blame] | 72 | else |
Xenia Ragiadakou | b3d42bf | 2013-06-06 16:40:51 +0300 | [diff] [blame] | 73 | write_nic_byte_E(dev, EPROM_CMD, cmdreg & ~EPROM_W_BIT); |
Jerry Chuang | 8fc8598 | 2009-11-03 07:17:11 -0200 | [diff] [blame] | 74 | |
| 75 | force_pci_posting(dev); |
| 76 | udelay(EPROM_DELAY); |
| 77 | } |
| 78 | |
| 79 | |
Ana Rey | f6bd19e | 2014-03-13 12:36:37 +0100 | [diff] [blame] | 80 | static short eprom_r(struct net_device *dev) |
Jerry Chuang | 8fc8598 | 2009-11-03 07:17:11 -0200 | [diff] [blame] | 81 | { |
Xenia Ragiadakou | b3d42bf | 2013-06-06 16:40:51 +0300 | [diff] [blame] | 82 | u8 bit; |
Salah Triki | 2fe9262 | 2016-05-04 04:42:40 +0100 | [diff] [blame] | 83 | int err; |
Jerry Chuang | 8fc8598 | 2009-11-03 07:17:11 -0200 | [diff] [blame] | 84 | |
Salah Triki | 2fe9262 | 2016-05-04 04:42:40 +0100 | [diff] [blame] | 85 | err = read_nic_byte_E(dev, EPROM_CMD, &bit); |
| 86 | if (err) |
| 87 | return err; |
| 88 | |
Jerry Chuang | 8fc8598 | 2009-11-03 07:17:11 -0200 | [diff] [blame] | 89 | udelay(EPROM_DELAY); |
| 90 | |
Xenia Ragiadakou | b3d42bf | 2013-06-06 16:40:51 +0300 | [diff] [blame] | 91 | if (bit & EPROM_R_BIT) |
| 92 | return 1; |
| 93 | |
Jerry Chuang | 8fc8598 | 2009-11-03 07:17:11 -0200 | [diff] [blame] | 94 | return 0; |
| 95 | } |
| 96 | |
| 97 | |
Ana Rey | f6bd19e | 2014-03-13 12:36:37 +0100 | [diff] [blame] | 98 | static void eprom_send_bits_string(struct net_device *dev, short b[], int len) |
Jerry Chuang | 8fc8598 | 2009-11-03 07:17:11 -0200 | [diff] [blame] | 99 | { |
| 100 | int i; |
| 101 | |
Chaitanya Hazarey | 6371f21 | 2014-05-27 15:35:09 -0700 | [diff] [blame] | 102 | for (i = 0; i < len; i++) { |
Jerry Chuang | 8fc8598 | 2009-11-03 07:17:11 -0200 | [diff] [blame] | 103 | eprom_w(dev, b[i]); |
| 104 | eprom_ck_cycle(dev); |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | |
Salah Triki | 6ceb65b | 2016-05-04 04:42:41 +0100 | [diff] [blame] | 109 | int eprom_read(struct net_device *dev, u32 addr) |
Jerry Chuang | 8fc8598 | 2009-11-03 07:17:11 -0200 | [diff] [blame] | 110 | { |
| 111 | struct r8192_priv *priv = ieee80211_priv(dev); |
Chaitanya Hazarey | 6371f21 | 2014-05-27 15:35:09 -0700 | [diff] [blame] | 112 | short read_cmd[] = {1, 1, 0}; |
Jerry Chuang | 8fc8598 | 2009-11-03 07:17:11 -0200 | [diff] [blame] | 113 | short addr_str[8]; |
| 114 | int i; |
| 115 | int addr_len; |
| 116 | u32 ret; |
Salah Triki | 6ceb65b | 2016-05-04 04:42:41 +0100 | [diff] [blame] | 117 | int err; |
Jerry Chuang | 8fc8598 | 2009-11-03 07:17:11 -0200 | [diff] [blame] | 118 | |
Chaitanya Hazarey | 6371f21 | 2014-05-27 15:35:09 -0700 | [diff] [blame] | 119 | ret = 0; |
Sanjeev Sharma | 2ad99c5 | 2014-07-31 11:13:29 +0530 | [diff] [blame] | 120 | /* enable EPROM programming */ |
Jerry Chuang | 8fc8598 | 2009-11-03 07:17:11 -0200 | [diff] [blame] | 121 | write_nic_byte_E(dev, EPROM_CMD, |
| 122 | (EPROM_CMD_PROGRAM<<EPROM_CMD_OPERATING_MODE_SHIFT)); |
| 123 | force_pci_posting(dev); |
| 124 | udelay(EPROM_DELAY); |
| 125 | |
Chaitanya Hazarey | 6371f21 | 2014-05-27 15:35:09 -0700 | [diff] [blame] | 126 | if (priv->epromtype == EPROM_93c56) { |
| 127 | addr_str[7] = addr & 1; |
| 128 | addr_str[6] = addr & (1<<1); |
| 129 | addr_str[5] = addr & (1<<2); |
| 130 | addr_str[4] = addr & (1<<3); |
| 131 | addr_str[3] = addr & (1<<4); |
| 132 | addr_str[2] = addr & (1<<5); |
| 133 | addr_str[1] = addr & (1<<6); |
| 134 | addr_str[0] = addr & (1<<7); |
| 135 | addr_len = 8; |
| 136 | } else { |
| 137 | addr_str[5] = addr & 1; |
| 138 | addr_str[4] = addr & (1<<1); |
| 139 | addr_str[3] = addr & (1<<2); |
| 140 | addr_str[2] = addr & (1<<3); |
| 141 | addr_str[1] = addr & (1<<4); |
| 142 | addr_str[0] = addr & (1<<5); |
| 143 | addr_len = 6; |
Jerry Chuang | 8fc8598 | 2009-11-03 07:17:11 -0200 | [diff] [blame] | 144 | } |
| 145 | eprom_cs(dev, 1); |
| 146 | eprom_ck_cycle(dev); |
| 147 | eprom_send_bits_string(dev, read_cmd, 3); |
| 148 | eprom_send_bits_string(dev, addr_str, addr_len); |
| 149 | |
Sanjeev Sharma | 2ad99c5 | 2014-07-31 11:13:29 +0530 | [diff] [blame] | 150 | /* |
| 151 | * keep chip pin D to low state while reading. |
| 152 | * I'm unsure if it is necessary, but anyway shouldn't hurt |
| 153 | */ |
Jerry Chuang | 8fc8598 | 2009-11-03 07:17:11 -0200 | [diff] [blame] | 154 | eprom_w(dev, 0); |
| 155 | |
Chaitanya Hazarey | 6371f21 | 2014-05-27 15:35:09 -0700 | [diff] [blame] | 156 | for (i = 0; i < 16; i++) { |
Sanjeev Sharma | 2ad99c5 | 2014-07-31 11:13:29 +0530 | [diff] [blame] | 157 | /* eeprom needs a clk cycle between writing opcode&adr |
| 158 | * and reading data. (eeprom outs a dummy 0) |
| 159 | */ |
Jerry Chuang | 8fc8598 | 2009-11-03 07:17:11 -0200 | [diff] [blame] | 160 | eprom_ck_cycle(dev); |
Salah Triki | 6ceb65b | 2016-05-04 04:42:41 +0100 | [diff] [blame] | 161 | err = eprom_r(dev); |
| 162 | if (err < 0) |
| 163 | return err; |
| 164 | |
| 165 | ret |= err<<(15-i); |
Jerry Chuang | 8fc8598 | 2009-11-03 07:17:11 -0200 | [diff] [blame] | 166 | } |
| 167 | |
| 168 | eprom_cs(dev, 0); |
| 169 | eprom_ck_cycle(dev); |
| 170 | |
Sanjeev Sharma | 2ad99c5 | 2014-07-31 11:13:29 +0530 | [diff] [blame] | 171 | /* disable EPROM programming */ |
Jerry Chuang | 8fc8598 | 2009-11-03 07:17:11 -0200 | [diff] [blame] | 172 | write_nic_byte_E(dev, EPROM_CMD, |
| 173 | (EPROM_CMD_NORMAL<<EPROM_CMD_OPERATING_MODE_SHIFT)); |
| 174 | return ret; |
| 175 | } |