drivers/mtd/mw_eeprom.c contains code that never worked. mw_eeprom_write()
and mw_eeprom_read() have incorrect loop conditions:
while (len <= 2) {
CONFIG_MW_EEPROM is not set anywhere. So let's simply drop the module.
Signed-off-by: Heinrich Schuchardt
---
drivers/mtd/Makefile| 1 -
drivers/mtd/mw_eeprom.c | 238
2 files changed, 239 deletions(-)
delete mode 100644 drivers/mtd/mw_eeprom.c
diff --git a/drivers/mtd/Makefile b/drivers/mtd/Makefile
index 318788c5e2..6d77ebfaa5 100644
--- a/drivers/mtd/Makefile
+++ b/drivers/mtd/Makefile
@@ -11,7 +11,6 @@ mtd-$(CONFIG_ALTERA_QSPI) += altera_qspi.o
mtd-$(CONFIG_FLASH_CFI_DRIVER) += cfi_flash.o
mtd-$(CONFIG_FLASH_CFI_MTD) += cfi_mtd.o
mtd-$(CONFIG_FLASH_CFI_LEGACY) += jedec_flash.o
-mtd-$(CONFIG_MW_EEPROM) += mw_eeprom.o
mtd-$(CONFIG_FLASH_PIC32) += pic32_flash.o
mtd-$(CONFIG_ST_SMI) += st_smi.o
mtd-$(CONFIG_STM32_FLASH) += stm32_flash.o
diff --git a/drivers/mtd/mw_eeprom.c b/drivers/mtd/mw_eeprom.c
deleted file mode 100644
index 9837733bee..00
--- a/drivers/mtd/mw_eeprom.c
+++ /dev/null
@@ -1,238 +0,0 @@
-/* Three-wire (MicroWire) serial eeprom driver (for 93C46 and compatibles) */
-
-#include
-#include
-#include
-#include
-
-/*
- * Serial EEPROM opcodes, including start bit
- */
-#define EEP_OPC_ERASE 0x7 /* 3-bit opcode */
-#define EEP_OPC_WRITE 0x5 /* 3-bit opcode */
-#define EEP_OPC_READ 0x6 /* 3-bit opcode */
-
-#define EEP_OPC_ERASE_ALL 0x12 /* 5-bit opcode */
-#define EEP_OPC_ERASE_EN 0x13 /* 5-bit opcode */
-#define EEP_OPC_WRITE_ALL 0x11 /* 5-bit opcode */
-#define EEP_OPC_ERASE_DIS 0x10 /* 5-bit opcode */
-
-static int addrlen;
-
-static void mw_eeprom_select(int dev)
-{
- ssi_set_interface(2048, 0, 0, 0);
- ssi_chip_select(0);
- udelay(1);
- ssi_chip_select(dev);
- udelay(1);
-}
-
-static int mw_eeprom_size(int dev)
-{
- int x;
- u16 res;
-
- mw_eeprom_select(dev);
- ssi_tx_byte(EEP_OPC_READ);
-
- res = ssi_txrx_byte(0) << 8;
- res |= ssi_rx_byte();
- for (x = 0; x < 16; x++) {
- if (! (res & 0x8000)) {
- break;
- }
- res <<= 1;
- }
- ssi_chip_select(0);
-
- return x;
-}
-
-int mw_eeprom_erase_enable(int dev)
-{
- mw_eeprom_select(dev);
- ssi_tx_byte(EEP_OPC_ERASE_EN);
- ssi_tx_byte(0);
- udelay(1);
- ssi_chip_select(0);
-
- return 0;
-}
-
-int mw_eeprom_erase_disable(int dev)
-{
- mw_eeprom_select(dev);
- ssi_tx_byte(EEP_OPC_ERASE_DIS);
- ssi_tx_byte(0);
- udelay(1);
- ssi_chip_select(0);
-
- return 0;
-}
-
-
-u32 mw_eeprom_read_word(int dev, int addr)
-{
- u16 rcv;
- u16 res;
- int bits;
-
- mw_eeprom_select(dev);
- ssi_tx_byte((EEP_OPC_READ << 5) | ((addr >> (addrlen - 5)) & 0x1f));
- rcv = ssi_txrx_byte(addr << (13 - addrlen));
- res = rcv << (16 - addrlen);
- bits = 4 + addrlen;
-
- while (bits>0) {
- rcv = ssi_rx_byte();
- if (bits > 7) {
- res |= rcv << (bits - 8);
- } else {
- res |= rcv >> (8 - bits);
- }
- bits -= 8;
- }
-
- ssi_chip_select(0);
-
- return res;
-}
-
-int mw_eeprom_write_word(int dev, int addr, u16 data)
-{
- u8 byte1=0;
- u8 byte2=0;
-
- mw_eeprom_erase_enable(dev);
- mw_eeprom_select(dev);
-
- switch (addrlen) {
-case 6:
- byte1 = EEP_OPC_WRITE >> 2;
- byte2 = (EEP_OPC_WRITE << 6)&0xc0;
- byte2 |= addr;
- break;
-case 7:
- byte1 = EEP_OPC_WRITE >> 1;
- byte2 = (EEP_OPC_WRITE << 7)&0x80;
- byte2 |= addr;
- break;
-case 8:
- byte1 = EEP_OPC_WRITE;
- byte2 = addr;
- break;
-case 9:
- byte1 = EEP_OPC_WRITE << 1;
- byte1 |= addr >> 8;
- byte2 = addr & 0xff;
- break;
-case 10:
- byte1 = EEP_OPC_WRITE << 2;
- byte1 |= addr >> 8;
- byte2 = addr & 0xff;
- break;
-default:
- printf("Unsupported number of address bits: %d\n", addrlen);
- return -1;
-
- }
-
- ssi_tx_byte(byte1);
- ssi_tx_byte(byte2);
- ssi_tx_byte(data >> 8);
- ssi_tx_byte(data & 0xff);
- ssi_chip_select(0);
- udelay(1); /* Worst case */
- mw_eeprom_erase_disable(dev);
-
- return 0;
-}
-
-
-int mw_eeprom_write(int dev, int addr, u8 *buffer, int len)
-{
- int done;
-
- done = 0;
- if (addr & 1) {
- u16 temp = mw_eeprom_read_word(dev, addr >> 1);
- temp &= 0xff00;
- temp
