diff options
Diffstat (limited to 'drivers/staging/rtl8192e/rtl8192e/rtl_eeprom.c')
| -rw-r--r-- | drivers/staging/rtl8192e/rtl8192e/rtl_eeprom.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/drivers/staging/rtl8192e/rtl8192e/rtl_eeprom.c b/drivers/staging/rtl8192e/rtl8192e/rtl_eeprom.c new file mode 100644 index 000000000000..c1ccff4a8321 --- /dev/null +++ b/drivers/staging/rtl8192e/rtl8192e/rtl_eeprom.c @@ -0,0 +1,139 @@ +/****************************************************************************** + * Copyright(c) 2008 - 2010 Realtek Corporation. All rights reserved. + * + * Based on the r8180 driver, which is: + * Copyright 2004-2005 Andrea Merello <andreamrl@tiscali.it>, et al. + * This program is free software; you can redistribute it and/or modify it + * under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA + * + * The full GNU General Public License is included in this distribution in the + * file called LICENSE. + * + * Contact Information: + * wlanfae <wlanfae@realtek.com> +******************************************************************************/ +#include "rtl_core.h" +#include "rtl_eeprom.h" + +static void eprom_cs(struct net_device *dev, short bit) +{ + if (bit) + write_nic_byte(dev, EPROM_CMD, + (1 << EPROM_CS_SHIFT) | + read_nic_byte(dev, EPROM_CMD)); + else + write_nic_byte(dev, EPROM_CMD, read_nic_byte(dev, EPROM_CMD) + & ~(1<<EPROM_CS_SHIFT)); + + udelay(EPROM_DELAY); +} + + +static void eprom_ck_cycle(struct net_device *dev) +{ + write_nic_byte(dev, EPROM_CMD, + (1<<EPROM_CK_SHIFT) | read_nic_byte(dev, EPROM_CMD)); + udelay(EPROM_DELAY); + write_nic_byte(dev, EPROM_CMD, + read_nic_byte(dev, EPROM_CMD) & ~(1<<EPROM_CK_SHIFT)); + udelay(EPROM_DELAY); +} + + +static void eprom_w(struct net_device *dev, short bit) +{ + if (bit) + write_nic_byte(dev, EPROM_CMD, (1<<EPROM_W_SHIFT) | + read_nic_byte(dev, EPROM_CMD)); + else + write_nic_byte(dev, EPROM_CMD, read_nic_byte(dev, EPROM_CMD) + & ~(1<<EPROM_W_SHIFT)); + + udelay(EPROM_DELAY); +} + + +static short eprom_r(struct net_device *dev) +{ + short bit; + + bit = (read_nic_byte(dev, EPROM_CMD) & (1<<EPROM_R_SHIFT)); + udelay(EPROM_DELAY); + + if (bit) + return 1; + return 0; +} + +static void eprom_send_bits_string(struct net_device *dev, short b[], int len) +{ + int i; + + for (i = 0; i < len; i++) { + eprom_w(dev, b[i]); + eprom_ck_cycle(dev); + } +} + +u32 eprom_read(struct net_device *dev, u32 addr) +{ + struct r8192_priv *priv = rtllib_priv(dev); + short read_cmd[] = {1, 1, 0}; + short addr_str[8]; + int i; + int addr_len; + u32 ret; + + ret = 0; + write_nic_byte(dev, EPROM_CMD, + (EPROM_CMD_PROGRAM << EPROM_CMD_OPERATING_MODE_SHIFT)); + udelay(EPROM_DELAY); + + if (priv->epromtype == EEPROM_93C56) { + addr_str[7] = addr & 1; + addr_str[6] = addr & (1<<1); + addr_str[5] = addr & (1<<2); + addr_str[4] = addr & (1<<3); + addr_str[3] = addr & (1<<4); + addr_str[2] = addr & (1<<5); + addr_str[1] = addr & (1<<6); + addr_str[0] = addr & (1<<7); + addr_len = 8; + } else { + addr_str[5] = addr & 1; + addr_str[4] = addr & (1<<1); + addr_str[3] = addr & (1<<2); + addr_str[2] = addr & (1<<3); + addr_str[1] = addr & (1<<4); + addr_str[0] = addr & (1<<5); + addr_len = 6; + } + eprom_cs(dev, 1); + eprom_ck_cycle(dev); + eprom_send_bits_string(dev, read_cmd, 3); + eprom_send_bits_string(dev, addr_str, addr_len); + + eprom_w(dev, 0); + + for (i = 0; i < 16; i++) { + eprom_ck_cycle(dev); + ret |= (eprom_r(dev)<<(15-i)); + } + + eprom_cs(dev, 0); + eprom_ck_cycle(dev); + + write_nic_byte(dev, EPROM_CMD, + (EPROM_CMD_NORMAL<<EPROM_CMD_OPERATING_MODE_SHIFT)); + return ret; +} |