2009-08-04 22:57:55 +00:00
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/*
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This files contains card eeprom (93c46 or 93c56) programming routines,
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memory is addressed by 16 bits words.
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This is part of rtl8180 OpenSource driver.
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Copyright (C) Andrea Merello 2004 <andreamrl@tiscali.it>
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Released under the terms of GPL (General Public Licence)
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Parts of this driver are based on the GPL part of the
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official realtek driver.
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Parts of this driver are based on the rtl8180 driver skeleton
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from Patric Schenke & Andres Salomon.
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Parts of this driver are based on the Intel Pro Wireless 2100 GPL driver.
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We want to tanks the Authors of those projects and the Ndiswrapper
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project Authors.
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*/
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#include "r8180_93cx6.h"
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2011-02-06 13:53:26 +00:00
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static void eprom_cs(struct r8192_priv *priv, short bit)
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2009-08-04 22:57:55 +00:00
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{
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2010-02-04 19:57:09 +00:00
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if (bit)
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2011-02-06 13:53:26 +00:00
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write_nic_byte(priv, EPROM_CMD,
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2010-08-10 14:44:26 +00:00
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(1<<EPROM_CS_SHIFT) |
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2011-02-06 13:53:26 +00:00
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read_nic_byte(priv, EPROM_CMD)); //enable EPROM
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2009-08-04 22:57:55 +00:00
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else
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2011-02-06 13:53:26 +00:00
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write_nic_byte(priv, EPROM_CMD, read_nic_byte(priv, EPROM_CMD)
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2009-08-04 22:57:55 +00:00
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&~(1<<EPROM_CS_SHIFT)); //disable EPROM
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udelay(EPROM_DELAY);
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}
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2011-02-06 13:53:26 +00:00
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static void eprom_ck_cycle(struct r8192_priv *priv)
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2009-08-04 22:57:55 +00:00
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{
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2011-02-06 13:53:26 +00:00
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write_nic_byte(priv, EPROM_CMD,
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(1<<EPROM_CK_SHIFT) | read_nic_byte(priv, EPROM_CMD));
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2009-08-04 22:57:55 +00:00
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udelay(EPROM_DELAY);
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2011-02-06 13:53:26 +00:00
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write_nic_byte(priv, EPROM_CMD,
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read_nic_byte(priv, EPROM_CMD) & ~(1<<EPROM_CK_SHIFT));
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2009-08-04 22:57:55 +00:00
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udelay(EPROM_DELAY);
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}
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2011-02-06 13:53:26 +00:00
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static void eprom_w(struct r8192_priv *priv, short bit)
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2009-08-04 22:57:55 +00:00
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{
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2010-02-04 19:57:09 +00:00
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if (bit)
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2011-02-06 13:53:26 +00:00
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write_nic_byte(priv, EPROM_CMD, (1<<EPROM_W_SHIFT) |
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read_nic_byte(priv, EPROM_CMD));
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2009-08-04 22:57:55 +00:00
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else
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2011-02-06 13:53:26 +00:00
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write_nic_byte(priv, EPROM_CMD, read_nic_byte(priv, EPROM_CMD)
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2009-08-04 22:57:55 +00:00
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&~(1<<EPROM_W_SHIFT));
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udelay(EPROM_DELAY);
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}
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2011-02-06 13:53:26 +00:00
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static short eprom_r(struct r8192_priv *priv)
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2009-08-04 22:57:55 +00:00
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{
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short bit;
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2011-02-06 13:53:26 +00:00
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bit = (read_nic_byte(priv, EPROM_CMD) & (1<<EPROM_R_SHIFT));
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2009-08-04 22:57:55 +00:00
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udelay(EPROM_DELAY);
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2010-02-04 19:57:09 +00:00
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if (bit)
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return 1;
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2009-08-04 22:57:55 +00:00
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return 0;
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}
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2011-02-06 13:53:26 +00:00
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static void eprom_send_bits_string(struct r8192_priv *priv, short b[], int len)
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2009-08-04 22:57:55 +00:00
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{
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int i;
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2010-02-04 19:57:09 +00:00
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for (i = 0; i < len; i++) {
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2011-02-06 13:53:26 +00:00
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eprom_w(priv, b[i]);
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eprom_ck_cycle(priv);
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2009-08-04 22:57:55 +00:00
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}
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}
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2011-03-03 13:44:58 +00:00
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u32 eprom_read(struct r8192_priv *priv, u32 addr)
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2009-08-04 22:57:55 +00:00
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{
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2010-02-04 19:57:09 +00:00
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short read_cmd[] = {1, 1, 0};
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2009-08-04 22:57:55 +00:00
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short addr_str[8];
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int i;
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int addr_len;
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u32 ret;
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2010-02-04 19:57:09 +00:00
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ret = 0;
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2009-08-04 22:57:55 +00:00
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//enable EPROM programming
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2011-02-06 13:53:26 +00:00
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write_nic_byte(priv, EPROM_CMD,
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2009-08-04 22:57:55 +00:00
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(EPROM_CMD_PROGRAM<<EPROM_CMD_OPERATING_MODE_SHIFT));
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udelay(EPROM_DELAY);
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2010-02-04 19:57:09 +00:00
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if (priv->epromtype == EPROM_93c56) {
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addr_str[7] = addr & 1;
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addr_str[6] = addr & (1<<1);
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addr_str[5] = addr & (1<<2);
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addr_str[4] = addr & (1<<3);
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addr_str[3] = addr & (1<<4);
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addr_str[2] = addr & (1<<5);
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addr_str[1] = addr & (1<<6);
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addr_str[0] = addr & (1<<7);
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addr_len = 8;
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} else {
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addr_str[5] = addr & 1;
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addr_str[4] = addr & (1<<1);
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addr_str[3] = addr & (1<<2);
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addr_str[2] = addr & (1<<3);
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addr_str[1] = addr & (1<<4);
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addr_str[0] = addr & (1<<5);
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addr_len = 6;
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2009-08-04 22:57:55 +00:00
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}
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2011-02-06 13:53:26 +00:00
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eprom_cs(priv, 1);
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eprom_ck_cycle(priv);
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eprom_send_bits_string(priv, read_cmd, 3);
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eprom_send_bits_string(priv, addr_str, addr_len);
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2009-08-04 22:57:55 +00:00
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//keep chip pin D to low state while reading.
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//I'm unsure if it is necessary, but anyway shouldn't hurt
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2011-02-06 13:53:26 +00:00
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eprom_w(priv, 0);
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2009-08-04 22:57:55 +00:00
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2010-02-04 19:57:09 +00:00
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for (i = 0; i < 16; i++) {
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2009-08-04 22:57:55 +00:00
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//eeprom needs a clk cycle between writing opcode&adr
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//and reading data. (eeprom outs a dummy 0)
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2011-02-06 13:53:26 +00:00
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eprom_ck_cycle(priv);
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ret |= (eprom_r(priv)<<(15-i));
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2009-08-04 22:57:55 +00:00
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}
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2011-02-06 13:53:26 +00:00
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eprom_cs(priv, 0);
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eprom_ck_cycle(priv);
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2009-08-04 22:57:55 +00:00
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//disable EPROM programming
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2011-02-06 13:53:26 +00:00
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write_nic_byte(priv, EPROM_CMD,
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2009-08-04 22:57:55 +00:00
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(EPROM_CMD_NORMAL<<EPROM_CMD_OPERATING_MODE_SHIFT));
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return ret;
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}
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