2 * This files contains card eeprom (93c46 or 93c56) programming routines,
3 * memory is addressed by 16 bits words.
5 * This is part of rtl8180 OpenSource driver.
6 * Copyright (C) Andrea Merello 2004 <andrea.merello@gmail.com>
7 * Released under the terms of GPL (General Public Licence)
9 * Parts of this driver are based on the GPL part of the
10 * official realtek driver.
12 * Parts of this driver are based on the rtl8180 driver skeleton
13 * from Patric Schenke & Andres Salomon.
15 * Parts of this driver are based on the Intel Pro Wireless 2100 GPL driver.
17 * We want to thank the Authors of those projects and the Ndiswrapper
21 #include "r8180_93cx6.h"
23 static void eprom_cs(struct net_device *dev, short bit)
28 err = read_nic_byte_E(dev, EPROM_CMD, &cmdreg);
33 write_nic_byte_E(dev, EPROM_CMD, cmdreg | EPROM_CS_BIT);
36 write_nic_byte_E(dev, EPROM_CMD, cmdreg & ~EPROM_CS_BIT);
38 force_pci_posting(dev);
43 static void eprom_ck_cycle(struct net_device *dev)
48 err = read_nic_byte_E(dev, EPROM_CMD, &cmdreg);
51 write_nic_byte_E(dev, EPROM_CMD, cmdreg | EPROM_CK_BIT);
52 force_pci_posting(dev);
55 read_nic_byte_E(dev, EPROM_CMD, &cmdreg);
56 write_nic_byte_E(dev, EPROM_CMD, cmdreg & ~EPROM_CK_BIT);
57 force_pci_posting(dev);
62 static void eprom_w(struct net_device *dev, short bit)
67 err = read_nic_byte_E(dev, EPROM_CMD, &cmdreg);
71 write_nic_byte_E(dev, EPROM_CMD, cmdreg | EPROM_W_BIT);
73 write_nic_byte_E(dev, EPROM_CMD, cmdreg & ~EPROM_W_BIT);
75 force_pci_posting(dev);
80 static short eprom_r(struct net_device *dev)
85 err = read_nic_byte_E(dev, EPROM_CMD, &bit);
91 if (bit & EPROM_R_BIT)
98 static void eprom_send_bits_string(struct net_device *dev, short b[], int len)
102 for (i = 0; i < len; i++) {
109 int eprom_read(struct net_device *dev, u32 addr)
111 struct r8192_priv *priv = ieee80211_priv(dev);
112 short read_cmd[] = {1, 1, 0};
120 /* enable EPROM programming */
121 write_nic_byte_E(dev, EPROM_CMD,
122 (EPROM_CMD_PROGRAM<<EPROM_CMD_OPERATING_MODE_SHIFT));
123 force_pci_posting(dev);
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);
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);
147 eprom_send_bits_string(dev, read_cmd, 3);
148 eprom_send_bits_string(dev, addr_str, addr_len);
151 * keep chip pin D to low state while reading.
152 * I'm unsure if it is necessary, but anyway shouldn't hurt
156 for (i = 0; i < 16; i++) {
157 /* eeprom needs a clk cycle between writing opcode&adr
158 * and reading data. (eeprom outs a dummy 0)
171 /* disable EPROM programming */
172 write_nic_byte_E(dev, EPROM_CMD,
173 (EPROM_CMD_NORMAL<<EPROM_CMD_OPERATING_MODE_SHIFT));