/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2002 by Alan Korr * * All files in this archive are subject to the GNU General Public License. * See the file COPYING in the source tree root for full license agreement. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ****************************************************************************/ #include #include "ata.h" #include "kernel.h" #include "thread.h" #include "led.h" #include "cpu.h" #include "system.h" #include "debug.h" #include "panic.h" #include "usb.h" #include "power.h" #include "string.h" #include "hwcompat.h" #if CONFIG_CPU == MCF5249 /* don't use sh7034 assembler routines */ #define PREFER_C_READING #define PREFER_C_WRITING #define ATA_IOBASE 0x20000000 #define ATA_DATA (*((volatile unsigned short*)ATA_IOBASE)) #define ATA_CONTROL (*((volatile unsigned short*)ATA_IOBASE + 0xe)) #elif CONFIG_CPU == SH7034 #define ATA_IOBASE 0x06100100 #define ATA_DATA (*((volatile unsigned short*)0x06104100)) #define ATA_CONTROL1 ((volatile unsigned char*)0x06200206) #define ATA_CONTROL2 ((volatile unsigned char*)0x06200306) #define ATA_CONTROL (*ata_control) #endif /* generic registers */ #define ATA_ERROR (*((volatile unsigned char*)ATA_IOBASE + 1)) #define ATA_NSECTOR (*((volatile unsigned char*)ATA_IOBASE + 2)) #define ATA_SECTOR (*((volatile unsigned char*)ATA_IOBASE + 3)) #define ATA_LCYL (*((volatile unsigned char*)ATA_IOBASE + 4)) #define ATA_HCYL (*((volatile unsigned char*)ATA_IOBASE + 5)) #define ATA_SELECT (*((volatile unsigned char*)ATA_IOBASE + 6)) #define ATA_COMMAND (*((volatile unsigned char*)ATA_IOBASE + 7)) #define ATA_FEATURE ATA_ERROR #define ATA_STATUS ATA_COMMAND #define ATA_ALT_STATUS ATA_CONTROL #define SELECT_DEVICE1 0x10 #define SELECT_LBA 0x40 #define STATUS_BSY 0x80 #define STATUS_RDY 0x40 #define STATUS_DF 0x20 #define STATUS_DRQ 0x08 #define STATUS_ERR 0x01 #define ERROR_ABRT 0x04 #define CONTROL_nIEN 0x02 #define CONTROL_SRST 0x04 #define CMD_READ_SECTORS 0x20 #define CMD_WRITE_SECTORS 0x30 #define CMD_READ_MULTIPLE 0xC4 #define CMD_WRITE_MULTIPLE 0xC5 #define CMD_SET_MULTIPLE_MODE 0xC6 #define CMD_STANDBY_IMMEDIATE 0xE0 #define CMD_STANDBY 0xE2 #define CMD_IDENTIFY 0xEC #define CMD_SLEEP 0xE6 #define CMD_SET_FEATURES 0xEF #define CMD_SECURITY_FREEZE_LOCK 0xF5 #define Q_SLEEP 0 #define READ_TIMEOUT 5*HZ #define SECTOR_SIZE 512 static struct mutex ata_mtx; char ata_device; /* device 0 (master) or 1 (slave) */ int ata_io_address; /* 0x300 or 0x200, only valid on recorder */ static volatile unsigned char* ata_control; bool old_recorder = false; int ata_spinup_time = 0; static bool spinup = false; static bool sleeping = true; static int sleep_timeout = 5*HZ; static bool poweroff = false; #ifdef HAVE_ATA_POWER_OFF static int poweroff_timeout = 2*HZ; #endif static char ata_stack[DEFAULT_STACK_SIZE]; static const char ata_thread_name[] = "ata"; static struct event_queue ata_queue; static bool initialized = false; static bool delayed_write = false; static unsigned char delayed_sector[SECTOR_SIZE]; static int delayed_sector_num; static long last_user_activity = -1; long last_disk_activity = -1; static int multisectors; /* number of supported multisectors */ static unsigned short identify_info[SECTOR_SIZE]; static int ata_power_on(void); static int perform_soft_reset(void); static int set_multiple_mode(int sectors); static int set_features(void); static int wait_for_bsy(void) __attribute__ ((section (".icode"))); static int wait_for_bsy(void) { int timeout = current_tick + HZ*30; while (TIME_BEFORE(current_tick, timeout) && (ATA_STATUS & STATUS_BSY)) { last_disk_activity = current_tick; yield(); } if (TIME_BEFORE(current_tick, timeout)) return 1; else return 0; /* timeout */ } static int wait_for_rdy(void) __attribute__ ((section (".icode"))); static int wait_for_rdy(void) { int timeout; if (!wait_for_bsy()) return 0; timeout = current_tick + HZ*10; while (TIME_BEFORE(current_tick, timeout) && !(ATA_ALT_STATUS & STATUS_RDY)) { last_disk_activity = current_tick; yield(); } if (TIME_BEFORE(current_tick, timeout)) return STATUS_RDY; else return 0; /* timeout */ } static int wait_for_start_of_transfer(void) __attribute__ ((section (".icode"))); static int wait_for_start_of_transfer(void) { if (!wait_for_bsy()) return 0; return (ATA_ALT_STATUS & (STATUS_BSY|STATUS_DRQ)) == STATUS_DRQ; } static int wait_for_end_of_transfer(void) __attribute__ ((section (".icode"))); static int wait_for_end_of_transfer(void) { if (!wait_for_bsy()) return 0; return (ATA_ALT_STATUS & (STATUS_RDY|STATUS_DRQ)) == STATUS_RDY; } /* the tight loop of ata_read_sectors(), to avoid the whole in IRAM */ static void copy_read_sectors(unsigned char* buf, int wordcount) __attribute__ ((section (".icode"))); static void copy_read_sectors(unsigned char* buf, int wordcount) { #ifdef PREFER_C_READING unsigned short tmp = 0; if ( (unsigned int)buf & 1) { /* not 16-bit aligned, copy byte by byte */ unsigned char* bufend = buf + wordcount*2; do { /* loop compiles to 9 assembler instructions */ /* takes 14 clock cycles (2 pipeline stalls, 1 wait) */ tmp = ATA_DATA; *buf++ = tmp & 0xff; /* I assume big endian */ *buf++ = tmp >> 8; /* and don't use the SWAB16 macro */ } while (buf < bufend); /* tail loop is faster */ } else { /* 16-bit aligned, can do faster copy */ unsigned short* wbuf = (unsigned short*)buf; unsigned short* wbufend = wbuf + wordcount; do { /* loop compiles to 7 assembler instructions */ /* takes 12 clock cycles (2 pipeline stalls, 1 wait) */ *wbuf = SWAB16(ATA_DATA); } while (++wbuf < wbufend); /* tail loop is faster */ } #else /* turbo-charged assembler version */ /* this assumes wordcount to be a multiple of 4 */ asm ( "add %1,%1 \n" /* wordcount -> bytecount */ "add %0,%1 \n" /* bytecount -> bufend */ "mov %0,r0 \n" "tst #1,r0 \n" /* 16-bit aligned ? */ "bt .aligned \n" /* yes, do word copy */ /* not 16-bit aligned */ "mov #-1,r3 \n" /* prepare a bit mask for high byte */ "shll8 r3 \n" /* r3 = 0xFFFFFF00 */ "mov.w @%2,r2 \n" /* read first word (1st round) */ "add #-12,%1 \n" /* adjust end address for offsets */ "mov.b r2,@%0 \n" /* store low byte of first word */ "bra .start4_b \n" /* jump into loop after next instr. */ "add #-5,%0 \n" /* adjust for dest. offsets; now even */ ".align 2 \n" ".loop4_b: \n" /* main loop: copy 4 words in a row */ "mov.w @%2,r2 \n" /* read first word (2+ round) */ "and r3,r1 \n" /* get high byte of fourth word (2+ round) */ "extu.b r2,r0 \n" /* get low byte of first word (2+ round) */ "or r1,r0 \n" /* combine with high byte of fourth word */ "mov.w r0,@(4,%0) \n" /* store at buf[4] */ "nop \n" /* maintain alignment */ ".start4_b: \n" "mov.w @%2,r1 \n" /* read second word */ "and r3,r2 \n" /* get high byte of first word */ "extu.b r1,r0 \n" /* get low byte of second word */ "or r2,r0 \n" /* combine with high byte of first word */ "mov.w r0,@(6,%0) \n" /* store at buf[6] */ "add #8,%0 \n" /* buf += 8 */ "mov.w @%2,r2 \n" /* read third word */ "and r3,r1 \n" /* get high byte of second word */ "extu.b r2,r0 \n" /* get low byte of third word */ "or r1,r0 \n" /* combine with high byte of second word */ "mov.w r0,@%0 \n" /* store at buf[0] */ "cmp/hi %0,%1 \n" /* check for end */ "mov.w @%2,r1 \n" /* read fourth word */ "and r3,r2 \n" /* get high byte of third word */ "extu.b r1,r0 \n" /* get low byte of fourth word */ "or r2,r0 \n" /* combine with high byte of third word */ "mov.w r0,@(2,%0) \n" /* store at buf[2] */ "bt .loop4_b \n" /* 24 instructions for 4 copies, takes 30 clock cycles (4 wait) */ /* avg. 7.5 cycles per word - 86% faster */ "swap.b r1,r0 \n" /* get high byte of last word */ "bra .exit \n" "mov.b r0,@(4,%0) \n" /* and store it */ ".align 2 \n" /* 16-bit aligned, loop(read and store word) */ ".aligned: \n" "mov.w @%2,r2 \n" /* read first word (1st round) */ "add #-12,%1 \n" /* adjust end address for offsets */ "bra .start4_w \n" /* jump into loop after next instr. */ "add #-6,%0 \n" /* adjust for destination offsets */ ".loop4_w: \n" /* main loop: copy 4 words in a row */ "mov.w @%2,r2 \n" /* read first word (2+ round) */ "swap.b r1,r0 \n" /* swap fourth word (2+ round) */ "mov.w r0,@(4,%0) \n" /* store fourth word (2+ round) */ "nop \n" /* maintain alignment */ ".start4_w: \n" "mov.w @%2,r1 \n" /* read second word */ "swap.b r2,r0 \n" /* swap first word */ "mov.w r0,@(6,%0) \n" /* store first word in buf[6] */ "add #8,%0 \n" /* buf += 8 */ "mov.w @%2,r2 \n" /* read third word */ "swap.b r1,r0 \n" /* swap second word */ "mov.w r0,@%0 \n" /* store second word in buf[0] */ "cmp/hi %0,%1 \n" /* check for end */ "mov.w @%2,r1 \n" /* read fourth word */ "swap.b r2,r0 \n" /* swap third word */ "mov.w r0,@(2,%0) \n" /* store third word */ "bt .loop4_w \n" /* 16 instructions for 4 copies, takes 22 clock cycles (4 wait) */ /* avg. 5.5 cycles per word - 118% faster */ "swap.b r1,r0 \n" /* swap fourth word (last round) */ "mov.w r0,@(4,%0) \n" /* and store it */ ".exit: \n" : /* outputs */ : /* inputs */ /* %0 */ "r"(buf), /* %1 */ "r"(wordcount), /* %2 */ "r"(&ATA_DATA) : /*trashed */ "r0","r1","r2","r3" ); #endif } int ata_read_sectors(unsigned long start, int incount, void* inbuf) { int ret = 0; int timeout; int count; void* buf; int spinup_start; mutex_lock(&ata_mtx); last_disk_activity = current_tick; spinup_start = current_tick; led(true); if ( sleeping ) { spinup = true; if (poweroff) { if (ata_power_on()) { mutex_unlock(&ata_mtx); led(false); return -1; } } else { if (perform_soft_reset()) { mutex_unlock(&ata_mtx); led(false); return -1; } } } timeout = current_tick + READ_TIMEOUT; ATA_SELECT = ata_device; if (!wait_for_rdy()) { mutex_unlock(&ata_mtx); led(false); return -2; } retry: buf = inbuf; count = incount; while (TIME_BEFORE(current_tick, timeout)) { ret = 0; last_disk_activity = current_tick; if ( count == 256 ) ATA_NSECTOR = 0; /* 0 means 256 sectors */ else ATA_NSECTOR = (unsigned char)count; ATA_SECTOR = start & 0xff; ATA_LCYL = (start >> 8) & 0xff; ATA_HCYL = (start >> 16) & 0xff; ATA_SELECT = ((start >> 24) & 0xf) | SELECT_LBA | ata_device; ATA_COMMAND = CMD_READ_MULTIPLE; /* wait at least 400ns between writing command and reading status */ asm volatile ("nop"); asm volatile ("nop"); asm volatile ("nop"); asm volatile ("nop"); asm volatile ("nop"); while (count) { int sectors; int wordcount; int status; if (!wait_for_start_of_transfer()) { /* We have timed out waiting for RDY and/or DRQ, possibly because the hard drive is shaking and has problems reading the data. We have two options: 1) Wait some more 2) Perform a soft reset and try again. We choose alternative 2. */ ata_soft_reset(); ret = -4; goto retry; } if (spinup) { ata_spinup_time = current_tick - spinup_start; spinup = false; sleeping = false; poweroff = false; } /* read the status register exactly once per loop */ status = ATA_STATUS; /* if destination address is odd, use byte copying, otherwise use word copying */ if (count >= multisectors ) sectors = multisectors; else sectors = count; wordcount = sectors * SECTOR_SIZE / 2; copy_read_sectors(buf, wordcount); /* "Device errors encountered during READ MULTIPLE commands are posted at the beginning of the block or partial block transfer, but the DRQ bit is still set to one and the data transfer shall take place, including transfer of corrupted data, if any." -- ATA specification */ if ( status & (STATUS_BSY | STATUS_ERR | STATUS_DF) ) { ata_soft_reset(); ret = -5; goto retry; } buf += sectors * SECTOR_SIZE; /* Advance one chunk of sectors */ count -= sectors; last_disk_activity = current_tick; } if(!ret && !wait_for_end_of_transfer()) { ata_soft_reset(); ret = -3; goto retry; } break; } led(false); mutex_unlock(&ata_mtx); /* only flush if reading went ok */ if ( (ret == 0) && delayed_write ) ata_flush(); return ret; } /* the tight loop of ata_write_sectors(), to avoid the whole in IRAM */ static void copy_write_sectors(const unsigned char* buf, int wordcount) __attribute__ ((section (".icode"))); static void copy_write_sectors(const unsigned char* buf, int wordcount) { #ifdef PREFER_C_WRITING if ( (unsigned int)buf & 1) { /* not 16-bit aligned, copy byte by byte */ unsigned short tmp = 0; const unsigned char* bufend = buf + wordcount*2; do { /* loop compiles to 9 assembler instructions */ /* takes 13 clock cycles (2 pipeline stalls) */ tmp = (unsigned short) *buf++; tmp |= (unsigned short) *buf++ << 8; /* I assume big endian */ ATA_DATA = tmp; /* and don't use the SWAB16 macro */ } while (buf < bufend); /* tail loop is faster */ } else { /* 16-bit aligned, can do faster copy */ unsigned short* wbuf = (unsigned short*)buf; unsigned short* wbufend = wbuf + wordcount; do { /* loop compiles to 6 assembler instructions */ /* takes 10 clock cycles (2 pipeline stalls) */ ATA_DATA = SWAB16(*wbuf); } while (++wbuf < wbufend); /* tail loop is faster */ } #else /* optimized assembler version */ /* this assumes wordcount to be a multiple of 2 */ /* writing is not unrolled as much as reading, for several reasons: * - a similar instruction sequence is faster for writing than for reading * because the auto-incrementing load inctructions can be used * - writing profits from warp mode * Both of these add up to have writing faster than the more unrolled reading. */ asm ( "add %1,%1 \n" /* wordcount -> bytecount */ "add %0,%1 \n" /* bytecount -> bufend */ "mov %0,r0 \n" "tst #1,r0 \n" /* 16-bit aligned ? */ "bt .w_aligned \n" /* yes, do word copy */ /* not 16-bit aligned */ "mov #-1,r6 \n" /* prepare a bit mask for high byte */ "shll8 r6 \n" /* r6 = 0xFFFFFF00 */ "mov.b @%0+,r2 \n" /* load (initial old second) first byte */ "add #-4,%1 \n" /* adjust end address for early check */ "mov.w @%0+,r3 \n" /* load (initial) first word */ "bra .w_start2_b \n" "extu.b r2,r0 \n" /* extend unsigned */ ".align 2 \n" ".w_loop2_b: \n" /* main loop: copy 2 words in a row */ "mov.w @%0+,r3 \n" /* load first word (2+ round) */ "extu.b r2,r0 \n" /* put away low byte of second word (2+ round) */ "and r6,r2 \n" /* get high byte of second word (2+ round) */ "or r1,r2 \n" /* combine with low byte of old first word */ "mov.w r2,@%2 \n" /* write that */ ".w_start2_b: \n" "cmp/hi %0,%1 \n" /* check for end */ "mov.w @%0+,r2 \n" /* load second word */ "extu.b r3,r1 \n" /* put away low byte of first word */ "and r6,r3 \n" /* get high byte of first word */ "or r0,r3 \n" /* combine with high byte of old second word */ "mov.w r3,@%2 \n" /* write that */ "bt .w_loop2_b \n" /* 12 instructions for 2 copies, takes 14 clock cycles */ /* avg. 7 cycles per word - 85% faster */ /* the loop "overreads" 1 byte past the buffer end, however, the last */ /* byte is not written to disk */ "and r6,r2 \n" /* get high byte of last word */ "or r1,r2 \n" /* combine with low byte of old first word */ "bra .w_exit \n" "mov.w r2,@%2 \n" /* write last word */ /* 16-bit aligned, loop(load and write word) */ ".w_aligned: \n" "mov.w @%0+,r2 \n" /* load first word (1st round) */ "bra .w_start2_w \n" /* jump into loop after next instr. */ "add #-4,%1 \n" /* adjust end address for early check */ ".align 2 \n" ".w_loop2_w: \n" /* main loop: copy 2 words in a row */ "mov.w @%0+,r2 \n" /* load first word (2+ round) */ "swap.b r1,r0 \n" /* swap second word (2+ round) */ "mov.w r0,@%2 \n" /* write second word (2+ round) */ ".w_start2_w: \n" "cmp/hi %0,%1 \n" /* check for end */ "mov.w @%0+,r1 \n" /* load second word */ "swap.b r2,r0 \n" /* swap first word */ "mov.w r0,@%2 \n" /* write first word */ "bt .w_loop2_w \n" /* 8 instructions for 2 copies, takes 10 clock cycles */ /* avg. 5 cycles per word - 100% faster */ "swap.b r1,r0 \n" /* swap second word (last round) */ "mov.w r0,@%2 \n" /* and write it */ ".w_exit: \n" : /* outputs */ : /* inputs */ /* %0 */ "r"(buf), /* %1 */ "r"(wordcount), /* %2 */ "r"(&ATA_DATA) : /*trashed */ "r0","r1","r2","r3","r6" ); #endif } int ata_write_sectors(unsigned long start, int count, const void* buf) { int i; int ret = 0; int spinup_start; if (start == 0) panicf("Writing on sector 0\n"); mutex_lock(&ata_mtx); last_disk_activity = current_tick; spinup_start = current_tick; led(true); if ( sleeping ) { spinup = true; if (poweroff) { if (ata_power_on()) { mutex_unlock(&ata_mtx); led(false); return -1; } } else { if (perform_soft_reset()) { mutex_unlock(&ata_mtx); led(false); return -1; } } } ATA_SELECT = ata_device; if (!wait_for_rdy()) { mutex_unlock(&ata_mtx); led(false); return -2; } if ( count == 256 ) ATA_NSECTOR = 0; /* 0 means 256 sectors */ else ATA_NSECTOR = (unsigned char)count; ATA_SECTOR = start & 0xff; ATA_LCYL = (start >> 8) & 0xff; ATA_HCYL = (start >> 16) & 0xff; ATA_SELECT = ((start >> 24) & 0xf) | SELECT_LBA | ata_device; ATA_COMMAND = CMD_WRITE_SECTORS; for (i=0; i 25us */ /* state HRR1 */ or_b(0x02, &PADRH); /* negate _RESET */ sleep(1); /* > 2ms */ #elif defined HAVE_SCF5249 #endif /* state HRR2 */ ATA_SELECT = ata_device; /* select the right device */ ret = wait_for_bsy(); /* Massage the return code so it is 0 on success and -1 on failure */ ret = ret?0:-1; return ret; } static int perform_soft_reset(void) { int ret; int retry_count; ATA_SELECT = SELECT_LBA | ata_device; ATA_CONTROL = CONTROL_nIEN|CONTROL_SRST; sleep(1); /* >= 5us */ ATA_CONTROL = CONTROL_nIEN; sleep(1); /* >2ms */ /* This little sucker can take up to 30 seconds */ retry_count = 8; do { ret = wait_for_rdy(); } while(!ret && retry_count--); /* Massage the return code so it is 0 on success and -1 on failure */ ret = ret?0:-1; return ret; } int ata_soft_reset(void) { int ret; mutex_lock(&ata_mtx); ret = perform_soft_reset(); mutex_unlock(&ata_mtx); return ret; } static int ata_power_on(void) { int rc; ide_power_enable(true); if( ata_hard_reset() ) return -1; rc = set_features(); if (rc) return rc * 10 - 2; if (set_multiple_mode(multisectors)) return -3; if (freeze_lock()) return -4; return 0; } static int master_slave_detect(void) { /* master? */ ATA_SELECT = 0; if ( ATA_STATUS & (STATUS_RDY|STATUS_BSY) ) { ata_device = 0; DEBUGF("Found master harddisk\n"); } else { /* slave? */ ATA_SELECT = SELECT_DEVICE1; if ( ATA_STATUS & (STATUS_RDY|STATUS_BSY) ) { ata_device = SELECT_DEVICE1; DEBUGF("Found slave harddisk\n"); } else return -1; } return 0; } #if CONFIG_CPU == SH7034 /* special archos quirk */ static void io_address_detect(void) { /* now, use the HW mask instead of probing */ if (read_hw_mask() & ATA_ADDRESS_200) { ata_io_address = 0x200; /* For debug purposes only */ old_recorder = false; ata_control = ATA_CONTROL1; } else { ata_io_address = 0x300; /* For debug purposes only */ old_recorder = true; ata_control = ATA_CONTROL2; } } #endif void ata_enable(bool on) { #if CONFIG_CPU == SH7034 if(on) and_b(~0x80, &PADRL); /* enable ATA */ else or_b(0x80, &PADRL); /* disable ATA */ or_b(0x80, &PAIORL); #elif defined HAVE_SCF5249 #endif } static int identify(void) { int i; ATA_SELECT = ata_device; if(!wait_for_rdy()) { DEBUGF("identify() - not RDY\n"); return -1; } ATA_COMMAND = CMD_IDENTIFY; if (!wait_for_start_of_transfer()) { DEBUGF("identify() - CMD failed\n"); return -2; } for (i=0; i */ }; int i; int pio_mode = 2; /* Find out the highest supported PIO mode */ if(identify_info[64] & 2) pio_mode = 4; else if(identify_info[64] & 1) pio_mode = 3; /* Update the table */ features[3].parameter = 8 + pio_mode; ATA_SELECT = ata_device; if (!wait_for_rdy()) { DEBUGF("set_features() - not RDY\n"); return -1; } for (i=0; features[i].id_word; i++) { if (identify_info[features[i].id_word] & (1 << features[i].id_bit)) { ATA_FEATURE = features[i].subcommand; ATA_NSECTOR = features[i].parameter; ATA_COMMAND = CMD_SET_FEATURES; if (!wait_for_rdy()) { DEBUGF("set_features() - CMD failed\n"); return -10 - i; } if(ATA_ALT_STATUS & STATUS_ERR) { if(ATA_ERROR & ERROR_ABRT) { return -20 - i; } } } } return 0; } unsigned short* ata_get_identify(void) { return identify_info; } static int init_and_check(bool hard_reset) { int rc; if (hard_reset) { /* This should reset both master and slave, we don't yet know what's in */ ata_device = 0; if (ata_hard_reset()) return -1; } rc = master_slave_detect(); if (rc) return -10 + rc; /* symptom fix: else check_registers() below may fail */ if (hard_reset && !wait_for_bsy()) return -20; rc = check_registers(); if (rc) return -30 + rc; return 0; } int ata_init(void) { int rc; bool coldstart = (PACR2 & 0x4000) != 0; mutex_init(&ata_mtx); led(false); #if CONFIG_CPU == SH7034 /* Port A setup */ or_b(0x02, &PAIORH); /* output for ATA reset */ or_b(0x02, &PADRH); /* release ATA reset */ PACR2 &= 0xBFFF; /* GPIO function for PA7 (IDE enable) */ #elif defined HAVE_SCF5249 #endif sleeping = false; ata_enable(true); if ( !initialized ) { if (!ide_powered()) /* somebody has switched it off */ { ide_power_enable(true); sleep(HZ); /* allow voltage to build up */ } #if CONFIG_CPU == SH7034 io_address_detect(); #endif /* first try, hard reset at cold start only */ rc = init_and_check(coldstart); if (rc) { /* failed? -> second try, always with hard reset */ DEBUGF("ata: init failed, retrying...\n"); rc = init_and_check(true); if (rc) return rc; } rc = identify(); if (rc) return -40 + rc; multisectors = identify_info[47] & 0xff; DEBUGF("ata: %d sectors per ata request\n",multisectors); rc = freeze_lock(); if (rc) return -50 + rc; rc = set_features(); if (rc) return -60 + rc; queue_init(&ata_queue); last_disk_activity = current_tick; create_thread(ata_thread, ata_stack, sizeof(ata_stack), ata_thread_name); initialized = true; } rc = set_multiple_mode(multisectors); if (rc) return -70 + rc; return 0; }