Greg Kroah-Hartman | ecdfa44 | 2009-08-04 15:57:55 -0700 | [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 | |
| 17 | We want to tanks the Authors of those projects and the Ndiswrapper |
| 18 | project Authors. |
| 19 | */ |
| 20 | |
| 21 | #include "r8180_93cx6.h" |
| 22 | |
Greg Kroah-Hartman | 5e1ad18 | 2009-08-10 16:34:22 -0700 | [diff] [blame] | 23 | static void eprom_cs(struct net_device *dev, short bit) |
Greg Kroah-Hartman | ecdfa44 | 2009-08-04 15:57:55 -0700 | [diff] [blame] | 24 | { |
Tim Schofield | 01823a1 | 2010-02-04 19:57:09 +0000 | [diff] [blame] | 25 | if (bit) |
Greg Kroah-Hartman | ecdfa44 | 2009-08-04 15:57:55 -0700 | [diff] [blame] | 26 | write_nic_byte(dev, EPROM_CMD, |
| 27 | (1<<EPROM_CS_SHIFT) | \ |
| 28 | read_nic_byte(dev, EPROM_CMD)); //enable EPROM |
| 29 | else |
| 30 | write_nic_byte(dev, EPROM_CMD, read_nic_byte(dev, EPROM_CMD)\ |
| 31 | &~(1<<EPROM_CS_SHIFT)); //disable EPROM |
| 32 | |
| 33 | force_pci_posting(dev); |
| 34 | udelay(EPROM_DELAY); |
| 35 | } |
| 36 | |
| 37 | |
Greg Kroah-Hartman | 5e1ad18 | 2009-08-10 16:34:22 -0700 | [diff] [blame] | 38 | static void eprom_ck_cycle(struct net_device *dev) |
Greg Kroah-Hartman | ecdfa44 | 2009-08-04 15:57:55 -0700 | [diff] [blame] | 39 | { |
| 40 | write_nic_byte(dev, EPROM_CMD, |
Tim Schofield | 01823a1 | 2010-02-04 19:57:09 +0000 | [diff] [blame] | 41 | (1<<EPROM_CK_SHIFT) | read_nic_byte(dev, EPROM_CMD)); |
Greg Kroah-Hartman | ecdfa44 | 2009-08-04 15:57:55 -0700 | [diff] [blame] | 42 | force_pci_posting(dev); |
| 43 | udelay(EPROM_DELAY); |
| 44 | write_nic_byte(dev, EPROM_CMD, |
Tim Schofield | 01823a1 | 2010-02-04 19:57:09 +0000 | [diff] [blame] | 45 | read_nic_byte(dev, EPROM_CMD) & ~(1<<EPROM_CK_SHIFT)); |
Greg Kroah-Hartman | ecdfa44 | 2009-08-04 15:57:55 -0700 | [diff] [blame] | 46 | force_pci_posting(dev); |
| 47 | udelay(EPROM_DELAY); |
| 48 | } |
| 49 | |
| 50 | |
Tim Schofield | 01823a1 | 2010-02-04 19:57:09 +0000 | [diff] [blame] | 51 | static void eprom_w(struct net_device *dev, short bit) |
Greg Kroah-Hartman | ecdfa44 | 2009-08-04 15:57:55 -0700 | [diff] [blame] | 52 | { |
Tim Schofield | 01823a1 | 2010-02-04 19:57:09 +0000 | [diff] [blame] | 53 | if (bit) |
Greg Kroah-Hartman | ecdfa44 | 2009-08-04 15:57:55 -0700 | [diff] [blame] | 54 | write_nic_byte(dev, EPROM_CMD, (1<<EPROM_W_SHIFT) | \ |
Tim Schofield | 01823a1 | 2010-02-04 19:57:09 +0000 | [diff] [blame] | 55 | read_nic_byte(dev, EPROM_CMD)); |
Greg Kroah-Hartman | ecdfa44 | 2009-08-04 15:57:55 -0700 | [diff] [blame] | 56 | else |
Tim Schofield | 01823a1 | 2010-02-04 19:57:09 +0000 | [diff] [blame] | 57 | write_nic_byte(dev, EPROM_CMD, read_nic_byte(dev, EPROM_CMD)\ |
Greg Kroah-Hartman | ecdfa44 | 2009-08-04 15:57:55 -0700 | [diff] [blame] | 58 | &~(1<<EPROM_W_SHIFT)); |
| 59 | |
| 60 | force_pci_posting(dev); |
| 61 | udelay(EPROM_DELAY); |
| 62 | } |
| 63 | |
| 64 | |
Greg Kroah-Hartman | 5e1ad18 | 2009-08-10 16:34:22 -0700 | [diff] [blame] | 65 | static short eprom_r(struct net_device *dev) |
Greg Kroah-Hartman | ecdfa44 | 2009-08-04 15:57:55 -0700 | [diff] [blame] | 66 | { |
| 67 | short bit; |
| 68 | |
Tim Schofield | 01823a1 | 2010-02-04 19:57:09 +0000 | [diff] [blame] | 69 | bit = (read_nic_byte(dev, EPROM_CMD) & (1<<EPROM_R_SHIFT)); |
Greg Kroah-Hartman | ecdfa44 | 2009-08-04 15:57:55 -0700 | [diff] [blame] | 70 | udelay(EPROM_DELAY); |
| 71 | |
Tim Schofield | 01823a1 | 2010-02-04 19:57:09 +0000 | [diff] [blame] | 72 | if (bit) |
| 73 | return 1; |
Greg Kroah-Hartman | ecdfa44 | 2009-08-04 15:57:55 -0700 | [diff] [blame] | 74 | return 0; |
| 75 | } |
| 76 | |
| 77 | |
Greg Kroah-Hartman | 5e1ad18 | 2009-08-10 16:34:22 -0700 | [diff] [blame] | 78 | static void eprom_send_bits_string(struct net_device *dev, short b[], int len) |
Greg Kroah-Hartman | ecdfa44 | 2009-08-04 15:57:55 -0700 | [diff] [blame] | 79 | { |
| 80 | int i; |
| 81 | |
Tim Schofield | 01823a1 | 2010-02-04 19:57:09 +0000 | [diff] [blame] | 82 | for (i = 0; i < len; i++) { |
Greg Kroah-Hartman | ecdfa44 | 2009-08-04 15:57:55 -0700 | [diff] [blame] | 83 | eprom_w(dev, b[i]); |
| 84 | eprom_ck_cycle(dev); |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | |
| 89 | u32 eprom_read(struct net_device *dev, u32 addr) |
| 90 | { |
| 91 | struct r8192_priv *priv = ieee80211_priv(dev); |
Tim Schofield | 01823a1 | 2010-02-04 19:57:09 +0000 | [diff] [blame] | 92 | short read_cmd[] = {1, 1, 0}; |
Greg Kroah-Hartman | ecdfa44 | 2009-08-04 15:57:55 -0700 | [diff] [blame] | 93 | short addr_str[8]; |
| 94 | int i; |
| 95 | int addr_len; |
| 96 | u32 ret; |
| 97 | |
Tim Schofield | 01823a1 | 2010-02-04 19:57:09 +0000 | [diff] [blame] | 98 | ret = 0; |
Greg Kroah-Hartman | ecdfa44 | 2009-08-04 15:57:55 -0700 | [diff] [blame] | 99 | //enable EPROM programming |
| 100 | write_nic_byte(dev, EPROM_CMD, |
| 101 | (EPROM_CMD_PROGRAM<<EPROM_CMD_OPERATING_MODE_SHIFT)); |
| 102 | force_pci_posting(dev); |
| 103 | udelay(EPROM_DELAY); |
| 104 | |
Tim Schofield | 01823a1 | 2010-02-04 19:57:09 +0000 | [diff] [blame] | 105 | if (priv->epromtype == EPROM_93c56) { |
| 106 | addr_str[7] = addr & 1; |
| 107 | addr_str[6] = addr & (1<<1); |
| 108 | addr_str[5] = addr & (1<<2); |
| 109 | addr_str[4] = addr & (1<<3); |
| 110 | addr_str[3] = addr & (1<<4); |
| 111 | addr_str[2] = addr & (1<<5); |
| 112 | addr_str[1] = addr & (1<<6); |
| 113 | addr_str[0] = addr & (1<<7); |
| 114 | addr_len = 8; |
| 115 | } else { |
| 116 | addr_str[5] = addr & 1; |
| 117 | addr_str[4] = addr & (1<<1); |
| 118 | addr_str[3] = addr & (1<<2); |
| 119 | addr_str[2] = addr & (1<<3); |
| 120 | addr_str[1] = addr & (1<<4); |
| 121 | addr_str[0] = addr & (1<<5); |
| 122 | addr_len = 6; |
Greg Kroah-Hartman | ecdfa44 | 2009-08-04 15:57:55 -0700 | [diff] [blame] | 123 | } |
| 124 | eprom_cs(dev, 1); |
| 125 | eprom_ck_cycle(dev); |
| 126 | eprom_send_bits_string(dev, read_cmd, 3); |
| 127 | eprom_send_bits_string(dev, addr_str, addr_len); |
| 128 | |
| 129 | //keep chip pin D to low state while reading. |
| 130 | //I'm unsure if it is necessary, but anyway shouldn't hurt |
| 131 | eprom_w(dev, 0); |
| 132 | |
Tim Schofield | 01823a1 | 2010-02-04 19:57:09 +0000 | [diff] [blame] | 133 | for (i = 0; i < 16; i++) { |
Greg Kroah-Hartman | ecdfa44 | 2009-08-04 15:57:55 -0700 | [diff] [blame] | 134 | //eeprom needs a clk cycle between writing opcode&adr |
| 135 | //and reading data. (eeprom outs a dummy 0) |
| 136 | eprom_ck_cycle(dev); |
| 137 | ret |= (eprom_r(dev)<<(15-i)); |
| 138 | } |
| 139 | |
| 140 | eprom_cs(dev, 0); |
| 141 | eprom_ck_cycle(dev); |
| 142 | |
| 143 | //disable EPROM programming |
| 144 | write_nic_byte(dev, EPROM_CMD, |
| 145 | (EPROM_CMD_NORMAL<<EPROM_CMD_OPERATING_MODE_SHIFT)); |
| 146 | return ret; |
| 147 | } |