1f34f2e426
LASAT's sysctl interface was broken, it failed a check during boot because a single entry had a sysctl number and the rest were unnumbered. When I fixed it I noticed that the whole sysctl file needed a spring clean, it was using mutexes where it wasn't needed (it's only needed to protect during writes to the EEPROM), so I moved that stuff out and generally cleaned the whole thing up. So now, LASAT's sysctl/proc interface is working again. Signed-off-by: Thomas Horsten <thomas@horsten.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
281 lines
7 KiB
C
281 lines
7 KiB
C
/*
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* Thomas Horsten <thh@lasat.com>
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* Copyright (C) 2000 LASAT Networks A/S.
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*
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* This program is free software; you can distribute it and/or modify it
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* under the terms of the GNU General Public License (Version 2) as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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* Routines specific to the LASAT boards
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*/
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#include <linux/types.h>
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#include <linux/crc32.h>
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#include <asm/lasat/lasat.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/ctype.h>
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#include <linux/mutex.h>
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#include <asm/bootinfo.h>
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#include <asm/addrspace.h>
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#include "at93c.h"
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/* New model description table */
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#include "lasat_models.h"
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static DEFINE_MUTEX(lasat_eeprom_mutex);
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#define EEPROM_CRC(data, len) (~crc32(~0, data, len))
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struct lasat_info lasat_board_info;
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int EEPROMRead(unsigned int pos, unsigned char *data, int len)
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{
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int i;
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for (i = 0; i < len; i++)
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*data++ = at93c_read(pos++);
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return 0;
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}
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int EEPROMWrite(unsigned int pos, unsigned char *data, int len)
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{
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int i;
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for (i = 0; i < len; i++)
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at93c_write(pos++, *data++);
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return 0;
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}
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static void init_flash_sizes(void)
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{
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unsigned long *lb = lasat_board_info.li_flashpart_base;
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unsigned long *ls = lasat_board_info.li_flashpart_size;
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int i;
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ls[LASAT_MTD_BOOTLOADER] = 0x40000;
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ls[LASAT_MTD_SERVICE] = 0xC0000;
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ls[LASAT_MTD_NORMAL] = 0x100000;
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if (mips_machtype == MACH_LASAT_100) {
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lasat_board_info.li_flash_base = 0x1e000000;
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lb[LASAT_MTD_BOOTLOADER] = 0x1e400000;
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if (lasat_board_info.li_flash_size > 0x200000) {
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ls[LASAT_MTD_CONFIG] = 0x100000;
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ls[LASAT_MTD_FS] = 0x500000;
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}
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} else {
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lasat_board_info.li_flash_base = 0x10000000;
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if (lasat_board_info.li_flash_size < 0x1000000) {
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lb[LASAT_MTD_BOOTLOADER] = 0x10000000;
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ls[LASAT_MTD_CONFIG] = 0x100000;
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if (lasat_board_info.li_flash_size >= 0x400000)
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ls[LASAT_MTD_FS] =
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lasat_board_info.li_flash_size - 0x300000;
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}
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}
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for (i = 1; i < LASAT_MTD_LAST; i++)
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lb[i] = lb[i-1] + ls[i-1];
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}
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int lasat_init_board_info(void)
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{
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int c;
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unsigned long crc;
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unsigned long cfg0, cfg1;
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const struct product_info *ppi;
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int i_n_base_models = N_BASE_MODELS;
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const char * const * i_txt_base_models = txt_base_models;
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int i_n_prids = N_PRIDS;
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memset(&lasat_board_info, 0, sizeof(lasat_board_info));
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/* First read the EEPROM info */
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EEPROMRead(0, (unsigned char *)&lasat_board_info.li_eeprom_info,
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sizeof(struct lasat_eeprom_struct));
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/* Check the CRC */
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crc = EEPROM_CRC((unsigned char *)(&lasat_board_info.li_eeprom_info),
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sizeof(struct lasat_eeprom_struct) - 4);
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if (crc != lasat_board_info.li_eeprom_info.crc32) {
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printk(KERN_WARNING "WARNING...\nWARNING...\nEEPROM CRC does "
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"not match calculated, attempting to soldier on...\n");
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}
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if (lasat_board_info.li_eeprom_info.version != LASAT_EEPROM_VERSION) {
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printk(KERN_WARNING "WARNING...\nWARNING...\nEEPROM version "
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"%d, wanted version %d, attempting to soldier on...\n",
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(unsigned int)lasat_board_info.li_eeprom_info.version,
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LASAT_EEPROM_VERSION);
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}
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cfg0 = lasat_board_info.li_eeprom_info.cfg[0];
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cfg1 = lasat_board_info.li_eeprom_info.cfg[1];
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if (LASAT_W0_DSCTYPE(cfg0) != 1) {
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printk(KERN_WARNING "WARNING...\nWARNING...\n"
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"Invalid configuration read from EEPROM, attempting to "
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"soldier on...");
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}
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/* We have a valid configuration */
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switch (LASAT_W0_SDRAMBANKSZ(cfg0)) {
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case 0:
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lasat_board_info.li_memsize = 0x0800000;
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break;
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case 1:
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lasat_board_info.li_memsize = 0x1000000;
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break;
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case 2:
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lasat_board_info.li_memsize = 0x2000000;
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break;
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case 3:
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lasat_board_info.li_memsize = 0x4000000;
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break;
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case 4:
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lasat_board_info.li_memsize = 0x8000000;
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break;
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default:
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lasat_board_info.li_memsize = 0;
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}
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switch (LASAT_W0_SDRAMBANKS(cfg0)) {
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case 0:
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break;
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case 1:
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lasat_board_info.li_memsize *= 2;
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break;
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default:
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break;
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}
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switch (LASAT_W0_BUSSPEED(cfg0)) {
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case 0x0:
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lasat_board_info.li_bus_hz = 60000000;
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break;
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case 0x1:
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lasat_board_info.li_bus_hz = 66000000;
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break;
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case 0x2:
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lasat_board_info.li_bus_hz = 66666667;
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break;
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case 0x3:
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lasat_board_info.li_bus_hz = 80000000;
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break;
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case 0x4:
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lasat_board_info.li_bus_hz = 83333333;
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break;
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case 0x5:
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lasat_board_info.li_bus_hz = 100000000;
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break;
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}
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switch (LASAT_W0_CPUCLK(cfg0)) {
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case 0x0:
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lasat_board_info.li_cpu_hz =
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lasat_board_info.li_bus_hz;
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break;
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case 0x1:
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lasat_board_info.li_cpu_hz =
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lasat_board_info.li_bus_hz +
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(lasat_board_info.li_bus_hz >> 1);
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break;
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case 0x2:
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lasat_board_info.li_cpu_hz =
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lasat_board_info.li_bus_hz +
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lasat_board_info.li_bus_hz;
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break;
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case 0x3:
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lasat_board_info.li_cpu_hz =
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lasat_board_info.li_bus_hz +
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lasat_board_info.li_bus_hz +
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(lasat_board_info.li_bus_hz >> 1);
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break;
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case 0x4:
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lasat_board_info.li_cpu_hz =
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lasat_board_info.li_bus_hz +
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lasat_board_info.li_bus_hz +
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lasat_board_info.li_bus_hz;
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break;
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}
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/* Flash size */
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switch (LASAT_W1_FLASHSIZE(cfg1)) {
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case 0:
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lasat_board_info.li_flash_size = 0x200000;
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break;
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case 1:
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lasat_board_info.li_flash_size = 0x400000;
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break;
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case 2:
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lasat_board_info.li_flash_size = 0x800000;
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break;
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case 3:
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lasat_board_info.li_flash_size = 0x1000000;
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break;
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case 4:
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lasat_board_info.li_flash_size = 0x2000000;
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break;
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}
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init_flash_sizes();
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lasat_board_info.li_bmid = LASAT_W0_BMID(cfg0);
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lasat_board_info.li_prid = lasat_board_info.li_eeprom_info.prid;
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if (lasat_board_info.li_prid == 0xffff || lasat_board_info.li_prid == 0)
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lasat_board_info.li_prid = lasat_board_info.li_bmid;
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/* Base model stuff */
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if (lasat_board_info.li_bmid > i_n_base_models)
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lasat_board_info.li_bmid = i_n_base_models;
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strcpy(lasat_board_info.li_bmstr,
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i_txt_base_models[lasat_board_info.li_bmid]);
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/* Product ID dependent values */
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c = lasat_board_info.li_prid;
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if (c >= i_n_prids) {
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strcpy(lasat_board_info.li_namestr, "Unknown Model");
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strcpy(lasat_board_info.li_typestr, "Unknown Type");
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} else {
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ppi = &vendor_info_table[0].vi_product_info[c];
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strcpy(lasat_board_info.li_namestr, ppi->pi_name);
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if (ppi->pi_type)
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strcpy(lasat_board_info.li_typestr, ppi->pi_type);
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else
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sprintf(lasat_board_info.li_typestr, "%d", 10 * c);
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}
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return 0;
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}
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void lasat_write_eeprom_info(void)
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{
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unsigned long crc;
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mutex_lock(&lasat_eeprom_mutex);
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/* Generate the CRC */
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crc = EEPROM_CRC((unsigned char *)(&lasat_board_info.li_eeprom_info),
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sizeof(struct lasat_eeprom_struct) - 4);
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lasat_board_info.li_eeprom_info.crc32 = crc;
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/* Write the EEPROM info */
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EEPROMWrite(0, (unsigned char *)&lasat_board_info.li_eeprom_info,
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sizeof(struct lasat_eeprom_struct));
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mutex_unlock(&lasat_eeprom_mutex);
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}
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