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. |
| 6 | Copyright (C) Andrea Merello 2004 <andreamrl@tiscali.it> |
| 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 | |
| 23 | void eprom_cs(struct net_device *dev, short bit) |
| 24 | { |
| 25 | if(bit) |
| 26 | write_nic_byte_E(dev, EPROM_CMD, |
| 27 | (1<<EPROM_CS_SHIFT) | \ |
| 28 | read_nic_byte_E(dev, EPROM_CMD)); //enable EPROM |
| 29 | else |
| 30 | write_nic_byte_E(dev, EPROM_CMD, read_nic_byte_E(dev, EPROM_CMD)\ |
| 31 | &~(1<<EPROM_CS_SHIFT)); //disable EPROM |
| 32 | |
| 33 | force_pci_posting(dev); |
| 34 | udelay(EPROM_DELAY); |
| 35 | } |
| 36 | |
| 37 | |
| 38 | void eprom_ck_cycle(struct net_device *dev) |
| 39 | { |
| 40 | write_nic_byte_E(dev, EPROM_CMD, |
| 41 | (1<<EPROM_CK_SHIFT) | read_nic_byte_E(dev,EPROM_CMD)); |
| 42 | force_pci_posting(dev); |
| 43 | udelay(EPROM_DELAY); |
| 44 | write_nic_byte_E(dev, EPROM_CMD, |
| 45 | read_nic_byte_E(dev, EPROM_CMD) &~ (1<<EPROM_CK_SHIFT)); |
| 46 | force_pci_posting(dev); |
| 47 | udelay(EPROM_DELAY); |
| 48 | } |
| 49 | |
| 50 | |
| 51 | void eprom_w(struct net_device *dev,short bit) |
| 52 | { |
| 53 | if(bit) |
| 54 | write_nic_byte_E(dev, EPROM_CMD, (1<<EPROM_W_SHIFT) | \ |
| 55 | read_nic_byte_E(dev,EPROM_CMD)); |
| 56 | else |
| 57 | write_nic_byte_E(dev, EPROM_CMD, read_nic_byte_E(dev,EPROM_CMD)\ |
| 58 | &~(1<<EPROM_W_SHIFT)); |
| 59 | |
| 60 | force_pci_posting(dev); |
| 61 | udelay(EPROM_DELAY); |
| 62 | } |
| 63 | |
| 64 | |
| 65 | short eprom_r(struct net_device *dev) |
| 66 | { |
| 67 | short bit; |
| 68 | |
| 69 | bit=(read_nic_byte_E(dev, EPROM_CMD) & (1<<EPROM_R_SHIFT) ); |
| 70 | udelay(EPROM_DELAY); |
| 71 | |
| 72 | if(bit) return 1; |
| 73 | return 0; |
| 74 | } |
| 75 | |
| 76 | |
| 77 | void eprom_send_bits_string(struct net_device *dev, short b[], int len) |
| 78 | { |
| 79 | int i; |
| 80 | |
| 81 | for(i=0; i<len; i++){ |
| 82 | eprom_w(dev, b[i]); |
| 83 | eprom_ck_cycle(dev); |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | |
| 88 | u32 eprom_read(struct net_device *dev, u32 addr) |
| 89 | { |
| 90 | struct r8192_priv *priv = ieee80211_priv(dev); |
| 91 | short read_cmd[]={1,1,0}; |
| 92 | short addr_str[8]; |
| 93 | int i; |
| 94 | int addr_len; |
| 95 | u32 ret; |
| 96 | |
| 97 | ret=0; |
| 98 | //enable EPROM programming |
| 99 | write_nic_byte_E(dev, EPROM_CMD, |
| 100 | (EPROM_CMD_PROGRAM<<EPROM_CMD_OPERATING_MODE_SHIFT)); |
| 101 | force_pci_posting(dev); |
| 102 | udelay(EPROM_DELAY); |
| 103 | |
| 104 | if (priv->epromtype==EPROM_93c56){ |
| 105 | addr_str[7]=addr & 1; |
| 106 | addr_str[6]=addr & (1<<1); |
| 107 | addr_str[5]=addr & (1<<2); |
| 108 | addr_str[4]=addr & (1<<3); |
| 109 | addr_str[3]=addr & (1<<4); |
| 110 | addr_str[2]=addr & (1<<5); |
| 111 | addr_str[1]=addr & (1<<6); |
| 112 | addr_str[0]=addr & (1<<7); |
| 113 | addr_len=8; |
| 114 | }else{ |
| 115 | addr_str[5]=addr & 1; |
| 116 | addr_str[4]=addr & (1<<1); |
| 117 | addr_str[3]=addr & (1<<2); |
| 118 | addr_str[2]=addr & (1<<3); |
| 119 | addr_str[1]=addr & (1<<4); |
| 120 | addr_str[0]=addr & (1<<5); |
| 121 | addr_len=6; |
| 122 | } |
| 123 | eprom_cs(dev, 1); |
| 124 | eprom_ck_cycle(dev); |
| 125 | eprom_send_bits_string(dev, read_cmd, 3); |
| 126 | eprom_send_bits_string(dev, addr_str, addr_len); |
| 127 | |
| 128 | //keep chip pin D to low state while reading. |
| 129 | //I'm unsure if it is necessary, but anyway shouldn't hurt |
| 130 | eprom_w(dev, 0); |
| 131 | |
| 132 | for(i=0;i<16;i++){ |
| 133 | //eeprom needs a clk cycle between writing opcode&adr |
| 134 | //and reading data. (eeprom outs a dummy 0) |
| 135 | eprom_ck_cycle(dev); |
| 136 | ret |= (eprom_r(dev)<<(15-i)); |
| 137 | } |
| 138 | |
| 139 | eprom_cs(dev, 0); |
| 140 | eprom_ck_cycle(dev); |
| 141 | |
| 142 | //disable EPROM programming |
| 143 | write_nic_byte_E(dev, EPROM_CMD, |
| 144 | (EPROM_CMD_NORMAL<<EPROM_CMD_OPERATING_MODE_SHIFT)); |
| 145 | return ret; |
| 146 | } |