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@@ -1,238 +0,0 @@
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-/* Three-wire (MicroWire) serial eeprom driver (for 93C46 and compatibles) */
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-
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-#include <common.h>
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-#include <eeprom.h>
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-#include <asm/ic/ssi.h>
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-#include <linux/delay.h>
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-
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-/*
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- * Serial EEPROM opcodes, including start bit
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- */
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-#define EEP_OPC_ERASE 0x7 /* 3-bit opcode */
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-#define EEP_OPC_WRITE 0x5 /* 3-bit opcode */
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-#define EEP_OPC_READ 0x6 /* 3-bit opcode */
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-
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-#define EEP_OPC_ERASE_ALL 0x12 /* 5-bit opcode */
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-#define EEP_OPC_ERASE_EN 0x13 /* 5-bit opcode */
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-#define EEP_OPC_WRITE_ALL 0x11 /* 5-bit opcode */
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-#define EEP_OPC_ERASE_DIS 0x10 /* 5-bit opcode */
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-
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-static int addrlen;
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-
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-static void mw_eeprom_select(int dev)
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-{
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- ssi_set_interface(2048, 0, 0, 0);
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- ssi_chip_select(0);
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- udelay(1);
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- ssi_chip_select(dev);
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- udelay(1);
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-}
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-
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-static int mw_eeprom_size(int dev)
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-{
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- int x;
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- u16 res;
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-
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- mw_eeprom_select(dev);
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- ssi_tx_byte(EEP_OPC_READ);
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-
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- res = ssi_txrx_byte(0) << 8;
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- res |= ssi_rx_byte();
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- for (x = 0; x < 16; x++) {
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- if (! (res & 0x8000)) {
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- break;
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- }
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- res <<= 1;
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- }
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- ssi_chip_select(0);
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-
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- return x;
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-}
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-
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-int mw_eeprom_erase_enable(int dev)
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-{
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- mw_eeprom_select(dev);
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- ssi_tx_byte(EEP_OPC_ERASE_EN);
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- ssi_tx_byte(0);
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- udelay(1);
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- ssi_chip_select(0);
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-
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- return 0;
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-}
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-
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-int mw_eeprom_erase_disable(int dev)
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-{
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- mw_eeprom_select(dev);
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- ssi_tx_byte(EEP_OPC_ERASE_DIS);
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- ssi_tx_byte(0);
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- udelay(1);
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- ssi_chip_select(0);
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-
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- return 0;
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-}
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-
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-
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-u32 mw_eeprom_read_word(int dev, int addr)
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-{
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- u16 rcv;
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- u16 res;
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- int bits;
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-
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- mw_eeprom_select(dev);
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- ssi_tx_byte((EEP_OPC_READ << 5) | ((addr >> (addrlen - 5)) & 0x1f));
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- rcv = ssi_txrx_byte(addr << (13 - addrlen));
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- res = rcv << (16 - addrlen);
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- bits = 4 + addrlen;
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-
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- while (bits>0) {
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- rcv = ssi_rx_byte();
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- if (bits > 7) {
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- res |= rcv << (bits - 8);
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- } else {
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- res |= rcv >> (8 - bits);
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- }
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- bits -= 8;
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- }
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-
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- ssi_chip_select(0);
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-
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- return res;
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-}
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-
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-int mw_eeprom_write_word(int dev, int addr, u16 data)
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-{
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- u8 byte1=0;
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- u8 byte2=0;
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-
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- mw_eeprom_erase_enable(dev);
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- mw_eeprom_select(dev);
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-
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- switch (addrlen) {
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- case 6:
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- byte1 = EEP_OPC_WRITE >> 2;
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- byte2 = (EEP_OPC_WRITE << 6)&0xc0;
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- byte2 |= addr;
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- break;
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- case 7:
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- byte1 = EEP_OPC_WRITE >> 1;
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- byte2 = (EEP_OPC_WRITE << 7)&0x80;
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- byte2 |= addr;
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- break;
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- case 8:
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- byte1 = EEP_OPC_WRITE;
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- byte2 = addr;
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- break;
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- case 9:
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- byte1 = EEP_OPC_WRITE << 1;
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- byte1 |= addr >> 8;
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- byte2 = addr & 0xff;
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- break;
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- case 10:
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- byte1 = EEP_OPC_WRITE << 2;
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- byte1 |= addr >> 8;
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- byte2 = addr & 0xff;
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- break;
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- default:
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- printf("Unsupported number of address bits: %d\n", addrlen);
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- return -1;
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-
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- }
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-
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- ssi_tx_byte(byte1);
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- ssi_tx_byte(byte2);
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- ssi_tx_byte(data >> 8);
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- ssi_tx_byte(data & 0xff);
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- ssi_chip_select(0);
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- udelay(10000); /* Worst case */
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- mw_eeprom_erase_disable(dev);
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-
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- return 0;
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-}
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-
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-
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-int mw_eeprom_write(int dev, int addr, u8 *buffer, int len)
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-{
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- int done;
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-
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- done = 0;
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- if (addr & 1) {
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- u16 temp = mw_eeprom_read_word(dev, addr >> 1);
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- temp &= 0xff00;
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- temp |= buffer[0];
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-
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- mw_eeprom_write_word(dev, addr >> 1, temp);
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- len--;
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- addr++;
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- buffer++;
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- done++;
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- }
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-
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- while (len <= 2) {
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- mw_eeprom_write_word(dev, addr >> 1, *(u16*)buffer);
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- len-=2;
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- addr+=2;
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- buffer+=2;
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- done+=2;
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- }
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-
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- if (len) {
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- u16 temp = mw_eeprom_read_word(dev, addr >> 1);
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- temp &= 0x00ff;
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- temp |= buffer[0] << 8;
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-
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- mw_eeprom_write_word(dev, addr >> 1, temp);
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- len--;
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- addr++;
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- buffer++;
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- done++;
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- }
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-
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- return done;
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-}
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-
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-
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-int mw_eeprom_read(int dev, int addr, u8 *buffer, int len)
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-{
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- int done;
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-
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- done = 0;
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- if (addr & 1) {
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- u16 temp = mw_eeprom_read_word(dev, addr >> 1);
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- buffer[0]= temp & 0xff;
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-
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- len--;
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- addr++;
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- buffer++;
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- done++;
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- }
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-
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- while (len <= 2) {
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- *(u16*)buffer = mw_eeprom_read_word(dev, addr >> 1);
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- len-=2;
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- addr+=2;
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- buffer+=2;
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- done+=2;
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- }
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-
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- if (len) {
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- u16 temp = mw_eeprom_read_word(dev, addr >> 1);
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- buffer[0] = temp >> 8;
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-
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- len--;
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- addr++;
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- buffer++;
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- done++;
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- }
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-
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- return done;
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-}
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-
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-int mw_eeprom_probe(int dev)
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-{
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- addrlen = mw_eeprom_size(dev);
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-
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- if (addrlen < 6 || addrlen > 10) {
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- return -1;
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- }
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- return 0;
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-}
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