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/* ----------------------------------------------------------------------- *
*
* Copyright 2009 Erwan Velu - All Rights Reserved
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall
* be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* -----------------------------------------------------------------------
*/
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <console.h>
#include "com32io.h"
#include "hdt-ata.h"
#ifdef ATA
/**
* ata_id_string - Convert IDENTIFY DEVICE page into string
* @id: IDENTIFY DEVICE results we will examine
* @s: string into which data is output
* @ofs: offset into identify device page
* @len: length of string to return. must be an even number.
*
* The strings in the IDENTIFY DEVICE page are broken up into
* 16-bit chunks. Run through the string, and output each
* 8-bit chunk linearly, regardless of platform.
*
* LOCKING:
* caller.
*/
void ata_id_string(const uint16_t *id, unsigned char *s,
unsigned int ofs, unsigned int len)
{
unsigned int c;
while (len > 0) {
c = id[ofs] >> 8;
*s = c;
s++;
c = id[ofs] & 0xff;
*s = c;
s++;
ofs++;
len -= 2;
}
}
/**
* ata_id_c_string - Convert IDENTIFY DEVICE page into C string
* @id: IDENTIFY DEVICE results we will examine
* @s: string into which data is output
* @ofs: offset into identify device page
* @len: length of string to return. must be an odd number.
*
* This function is identical to ata_id_string except that it
* trims trailing spaces and terminates the resulting string with
* null. @len must be actual maximum length (even number) + 1.
*
* LOCKING:
* caller.
*/
void ata_id_c_string(const uint16_t *id, unsigned char *s,
unsigned int ofs, unsigned int len)
{
unsigned char *p;
//WARN_ON(!(len & 1));
ata_id_string(id, s, ofs, len - 1);
p = s + strnlen(s, len - 1);
while (p > s && p[-1] == ' ')
p--;
*p = '\0';
}
#endif
/*
* Call int 13h, but with retry on failure. Especially floppies need this.
*/
int int13_retry(const com32sys_t *inreg, com32sys_t *outreg)
{
int retry = 6; /* Number of retries */
com32sys_t tmpregs;
if ( !outreg ) outreg = &tmpregs;
while ( retry-- ) {
__intcall(0x13, inreg, outreg);
if ( !(outreg->eflags.l & EFLAGS_CF) )
return 0; /* CF=0, OK */
}
return -1; /* Error */
}
/* Display CPU registers for debugging purposes */
void printregs(const com32sys_t *r)
{
printf("eflags = %08x ds = %04x es = %04x fs = %04x gs = %04x\n"
"eax = %08x ebx = %08x ecx = %08x edx = %08x\n"
"ebp = %08x esi = %08x edi = %08x esp = %08x\n",
r->eflags.l, r->ds, r->es, r->fs, r->gs,
r->eax.l, r->ebx.l, r->ecx.l, r->edx.l,
r->ebp.l, r->esi.l, r->edi.l, r->_unused_esp.l);
}
/* Try to get information for a given disk*/
int get_disk_params(int disk, struct diskinfo *disk_info)
{
static com32sys_t getparm, parm, getebios, ebios, inreg,outreg;
struct device_parameter dp;
#ifdef ATA
struct ata_identify_device aid;
#endif
memset(&(disk_info[disk]), 0, sizeof(struct diskinfo));
disk_info[disk].disk = disk;
disk_info[disk].ebios = disk_info[disk].cbios = 0;
/* Sending int 13h func 41h to query EBIOS information*/
memset(&getebios, 0, sizeof (com32sys_t));
memset(&ebios, 0, sizeof (com32sys_t));
/* Get EBIOS support */
getebios.eax.w[0] = 0x4100;
getebios.ebx.w[0] = 0x55aa;
getebios.edx.b[0] = disk;
getebios.eflags.b[0] = 0x3; /* CF set */
__intcall(0x13, &getebios, &ebios);
/* Detecting EDD support */
if ( !(ebios.eflags.l & EFLAGS_CF) &&
ebios.ebx.w[0] == 0xaa55 &&
(ebios.ecx.b[0] & 1) ) {
disk_info[disk].ebios = 1;
switch(ebios.eax.b[1]) {
case 32: strlcpy(disk_info[disk].edd_version,"1.0",3); break;
case 33: strlcpy(disk_info[disk].edd_version,"1.1",3); break;
case 48: strlcpy(disk_info[disk].edd_version,"3.0",3); break;
default: strlcpy(disk_info[disk].edd_version,"0",1); break;
}
}
/* Get disk parameters -- really only useful for
hard disks, but if we have a partitioned floppy
it's actually our best chance... */
memset(&getparm, 0, sizeof (com32sys_t));
memset(&parm, 0, sizeof (com32sys_t));
getparm.eax.b[1] = 0x08;
getparm.edx.b[0] = disk;
__intcall(0x13, &getparm, &parm);
if ( parm.eflags.l & EFLAGS_CF )
return disk_info[disk].ebios ? 0 : -1;
disk_info[disk].heads = parm.edx.b[1]+1;
disk_info[disk].sectors_per_track = parm.ecx.b[0] & 0x3f;
if ( disk_info[disk].sectors_per_track == 0 ) {
disk_info[disk].sectors_per_track = 1;
} else {
disk_info[disk].cbios = 1; /* Valid geometry */
}
/* FIXME: memset to 0 make it fails
* memset(__com32.cs_bounce, 0, sizeof(struct device_pairameter)); */
memset(&dp, 0, sizeof(struct device_parameter));
memset(&inreg, 0, sizeof(com32sys_t));
/* Requesting Extended Read Drive Parameters via int13h func 48h*/
inreg.esi.w[0] = OFFS(__com32.cs_bounce);
inreg.ds = SEG(__com32.cs_bounce);
inreg.eax.w[0] = 0x4800;
inreg.edx.b[0] = disk;
__intcall(0x13, &inreg, &outreg);
/* Saving bounce buffer before anything corrupt it */
memcpy(&dp, __com32.cs_bounce, sizeof (struct device_parameter));
if ( outreg.eflags.l & EFLAGS_CF) {
printf("Disk 0x%X doesn't supports EDD 3.0\n",disk);
return -1;
}
/* Copying result to the disk_info structure
* host_bus_type, interface_type, sectors & cylinders */
snprintf(disk_info[disk].host_bus_type,sizeof disk_info[disk].host_bus_type,"%c%c%c%c",dp.host_bus_type[0],dp.host_bus_type[1],dp.host_bus_type[2],dp.host_bus_type[3]);
snprintf(disk_info[disk].interface_type,sizeof disk_info[disk].interface_type,"%c%c%c%c%c%c%c%c",dp.interface_type[0],dp.interface_type[1],dp.interface_type[2],dp.interface_type[3],dp.interface_type[4],dp.interface_type[5],dp.interface_type[6],dp.interface_type[7]);
disk_info[disk].sectors=dp.sectors;
disk_info[disk].cylinders=dp.cylinders;
/*FIXME: we have to find a way to grab the model & fw
* We do put dummy data until we found a solution */
snprintf(disk_info[disk].aid.model,sizeof disk_info[disk].aid.model,"0x%X",disk);
snprintf(disk_info[disk].aid.fw_rev,sizeof disk_info[disk].aid.fw_rev,"%s","N/A");
snprintf(disk_info[disk].aid.serial_no,sizeof disk_info[disk].aid.serial_no,"%s","N/A");
/* Useless stuff before I figure how to send ata packets */
#ifdef ATA
memset(__com32.cs_bounce, 0, sizeof(struct device_parameter));
memset(&aid, 0, sizeof(struct ata_identify_device));
memset(&inreg, 0, sizeof inreg);
inreg.ebx.w[0] = OFFS(__com32.cs_bounce+1024);
inreg.es = SEG(__com32.cs_bounce+1024);
inreg.eax.w[0] = 0x2500;
inreg.edx.b[0] = disk;
__intcall(0x13,&inreg, &outreg);
memcpy(&aid, __com32.cs_bounce, sizeof (struct ata_identify_device));
if ( outreg.eflags.l & EFLAGS_CF) {
printf("Disk 0x%X: Failed to Identify Device\n",disk);
//FIXME
return 0;
}
// ata_id_c_string(aid, disk_info[disk].fwrev, ATA_ID_FW_REV, sizeof(disk_info[disk].fwrev));
// ata_id_c_string(aid, disk_info[disk].model, ATA_ID_PROD, sizeof(disk_info[disk].model));
char buff[sizeof(struct ata_identify_device)];
memcpy(buff,&aid, sizeof (struct ata_identify_device));
for (int j=0;j<sizeof(struct ata_identify_device);j++)
printf ("model=|%c|\n",buff[j]);
printf ("Disk 0x%X : %s %s %s\n",disk, aid.model, aid.fw_rev,aid.serial_no);
#endif
return 0;
}
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