diff options
Diffstat (limited to 'arch/arm/mach-clps711x/mp1000-seprom.c')
| -rw-r--r-- | arch/arm/mach-clps711x/mp1000-seprom.c | 195 |
1 files changed, 0 insertions, 195 deletions
diff --git a/arch/arm/mach-clps711x/mp1000-seprom.c b/arch/arm/mach-clps711x/mp1000-seprom.c deleted file mode 100644 index b22d0be..0000000 --- a/arch/arm/mach-clps711x/mp1000-seprom.c +++ /dev/null @@ -1,195 +0,0 @@ -/*` - * mp1000-seprom.c - * - * This file contains the Serial EEPROM code for the MP1000 board - * - * Copyright (C) 2005 Comdial Corporation - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - */ - -#include <linux/kernel.h> -#include <linux/init.h> -#include <asm/hardware.h> -#include <asm/hardware/clps7111.h> -#include <asm/arch/mp1000-seprom.h> - -/* If SepromInit() can initialize and checksum the seprom successfully, */ -/* then it will point seprom_data_ptr at the shadow copy. */ - -static eeprom_struct seprom_data; /* shadow copy of seprom content */ - -eeprom_struct *seprom_data_ptr = 0; /* 0 => not initialized */ - -/* - * Port D Bit 5 is Chip Select for EEPROM - * Port E Bit 0 is Input, Data out from EEPROM - * Port E Bit 1 is Output, Data in to EEPROM - * Port E Bit 2 is Output, CLK to EEPROM - */ - -static char *port_d_ptr = (char *)(CLPS7111_VIRT_BASE + PDDR); -static char *port_e_ptr = (char *)(CLPS7111_VIRT_BASE + PEDR); - -#define NO_OF_SHORTS 64 // Device is 64 x 16 bits -#define ENABLE_RW 0 -#define DISABLE_RW 1 - -static inline void toggle_seprom_clock(void) -{ - *port_e_ptr |= HwPortESepromCLK; - *port_e_ptr &= ~(HwPortESepromCLK); -} - -static inline void select_eeprom(void) -{ - *port_d_ptr |= HwPortDEECS; - *port_e_ptr &= ~(HwPortESepromCLK); -} - -static inline void deselect_eeprom(void) -{ - *port_d_ptr &= ~(HwPortDEECS); - *port_e_ptr &= ~(HwPortESepromDIn); -} - -/* - * GetSepromDataPtr - returns pointer to shadow (RAM) copy of seprom - * and returns 0 if seprom is not initialized or - * has a checksum error. - */ - -eeprom_struct* get_seprom_ptr(void) -{ - return seprom_data_ptr; -} - -unsigned char* get_eeprom_mac_address(void) -{ - return seprom_data_ptr->variant.eprom_struct.mac_Address; -} - -/* - * ReadSProm, Physically reads data from the Serial PROM - */ -static void read_sprom(short address, int length, eeprom_struct *buffer) -{ - short data = COMMAND_READ | (address & 0x3F); - short bit; - int i; - - select_eeprom(); - - // Clock in 9 bits of the command - for (i = 0, bit = 0x100; i < 9; i++, bit >>= 1) { - if (data & bit) - *port_e_ptr |= HwPortESepromDIn; - else - *port_e_ptr &= ~(HwPortESepromDIn); - - toggle_seprom_clock(); - } - - // - // Now read one or more shorts of data from the Seprom - // - while (length-- > 0) { - data = 0; - - // Read 16 bits at a time - for (i = 0; i < 16; i++) { - data <<= 1; - toggle_seprom_clock(); - data |= *port_e_ptr & HwPortESepromDOut; - - } - - buffer->variant.eprom_short_data[address++] = data; - } - - deselect_eeprom(); - - return; -} - - - -/* - * ReadSerialPROM - * - * Input: Pointer to array of 64 x 16 Bits - * - * Output: if no problem reading data is filled in - */ -static void read_serial_prom(eeprom_struct *data) -{ - read_sprom(0, 64, data); -} - - -// -// Compute Serial EEPROM checksum -// -// Input: Pointer to struct with Eprom data -// -// Output: The computed Eprom checksum -// -static short compute_seprom_checksum(eeprom_struct *data) -{ - short checksum = 0; - int i; - - for (i = 0; i < 126; i++) { - checksum += (short)data->variant.eprom_byte_data[i]; - } - - return((short)(0x5555 - (checksum & 0xFFFF))); -} - -// -// Make sure the data port bits for the SEPROM are correctly initialised -// - -void __init seprom_init(void) -{ - short checksum; - - // Init Port D - *(char *)(CLPS7111_VIRT_BASE + PDDDR) = 0x0; - *(char *)(CLPS7111_VIRT_BASE + PDDR) = 0x15; - - // Init Port E - *(int *)(CLPS7111_VIRT_BASE + PEDDR) = 0x06; - *(int *)(CLPS7111_VIRT_BASE + PEDR) = 0x04; - - // - // Make sure that EEPROM struct size never exceeds 128 bytes - // - if (sizeof(eeprom_struct) > 128) { - panic("Serial PROM struct size > 128, aborting read\n"); - } - - read_serial_prom(&seprom_data); - - checksum = compute_seprom_checksum(&seprom_data); - - if (checksum != seprom_data.variant.eprom_short_data[63]) { - panic("Serial EEPROM checksum failed\n"); - } - - seprom_data_ptr = &seprom_data; -} - |
