/* * linux/drivers/ide/ide-m8xx.c * * Copyright (C) 2000, 2001 Wolfgang Denk, wd@denx.de * Modified for direct IDE interface * by Thomas Lange, thomas@corelatus.com * Modified for direct IDE interface on 8xx without using the PCMCIA * controller * by Steven.Scholz@imc-berlin.de * Moved out of arch/ppc/kernel/m8xx_setup.c, other minor cleanups * by Mathew Locke */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ide_modes.h" static int identify (volatile unsigned char *p); static void print_fixed (volatile unsigned char *p); static void print_funcid (int func); static int check_ide_device (unsigned long base); static void ide_interrupt_ack (void *dev); static void m8xx_ide_tuneproc(ide_drive_t *drive, byte pio); typedef struct ide_ioport_desc { unsigned long base_off; /* Offset to PCMCIA memory */ ide_ioreg_t reg_off[IDE_NR_PORTS]; /* controller register offsets */ int irq; /* IRQ */ } ide_ioport_desc_t; ide_ioport_desc_t ioport_dsc[MAX_HWIFS] = { #ifdef IDE0_BASE_OFFSET { IDE0_BASE_OFFSET, { IDE0_DATA_REG_OFFSET, IDE0_ERROR_REG_OFFSET, IDE0_NSECTOR_REG_OFFSET, IDE0_SECTOR_REG_OFFSET, IDE0_LCYL_REG_OFFSET, IDE0_HCYL_REG_OFFSET, IDE0_SELECT_REG_OFFSET, IDE0_STATUS_REG_OFFSET, IDE0_CONTROL_REG_OFFSET, IDE0_IRQ_REG_OFFSET, }, IDE0_INTERRUPT, }, #ifdef IDE1_BASE_OFFSET { IDE1_BASE_OFFSET, { IDE1_DATA_REG_OFFSET, IDE1_ERROR_REG_OFFSET, IDE1_NSECTOR_REG_OFFSET, IDE1_SECTOR_REG_OFFSET, IDE1_LCYL_REG_OFFSET, IDE1_HCYL_REG_OFFSET, IDE1_SELECT_REG_OFFSET, IDE1_STATUS_REG_OFFSET, IDE1_CONTROL_REG_OFFSET, IDE1_IRQ_REG_OFFSET, }, IDE1_INTERRUPT, }, #endif /* IDE1_BASE_OFFSET */ #endif /* IDE0_BASE_OFFSET */ }; ide_pio_timings_t ide_pio_clocks[6]; int hold_time[6] = {30, 20, 15, 10, 10, 10 }; /* PIO Mode 5 with IORDY (nonstandard) */ /* * Warning: only 1 (ONE) PCMCIA slot supported here, * which must be correctly initialized by the firmware (PPCBoot). */ static int _slot_ = -1; /* will be read from PCMCIA registers */ /* Make clock cycles and always round up */ #define PCMCIA_MK_CLKS( t, T ) (( (t) * ((T)/1000000) + 999U ) / 1000U ) /* * IDE stuff. */ static int m8xx_ide_default_irq(ide_ioreg_t base) { #ifdef CONFIG_BLK_DEV_MPC8xx_IDE if (base >= MAX_HWIFS) return 0; printk("[%d] m8xx_ide_default_irq %d\n",__LINE__,ioport_dsc[base].irq); return (ioport_dsc[base].irq); #else return 9; #endif } static ide_ioreg_t m8xx_ide_default_io_base(int index) { return index; } #define M8XX_PCMCIA_CD2(slot) (0x10000000 >> (slot << 4)) #define M8XX_PCMCIA_CD1(slot) (0x08000000 >> (slot << 4)) /* * The TQM850L hardware has two pins swapped! Grrrrgh! */ #ifdef CONFIG_TQM850L #define __MY_PCMCIA_GCRX_CXRESET PCMCIA_GCRX_CXOE #define __MY_PCMCIA_GCRX_CXOE PCMCIA_GCRX_CXRESET #else #define __MY_PCMCIA_GCRX_CXRESET PCMCIA_GCRX_CXRESET #define __MY_PCMCIA_GCRX_CXOE PCMCIA_GCRX_CXOE #endif #if defined(CONFIG_BLK_DEV_MPC8xx_IDE) && defined(CONFIG_IDE_8xx_PCCARD) #define PCMCIA_SCHLVL IDE0_INTERRUPT /* Status Change Interrupt Level */ static int pcmcia_schlvl = PCMCIA_SCHLVL; #endif /* * See include/linux/ide.h for definition of hw_regs_t (p, base) */ /* * m8xx_ide_init_hwif_ports for a direct IDE interface _using_ */ #if defined(CONFIG_IDE_8xx_PCCARD) || defined(CONFIG_IDE_8xx_DIRECT) static void m8xx_ide_init_hwif_ports(hw_regs_t *hw, ide_ioreg_t data_port, ide_ioreg_t ctrl_port, int *irq) { ide_ioreg_t *p = hw->io_ports; int i; typedef struct { ulong br; ulong or; } pcmcia_win_t; volatile pcmcia_win_t *win; volatile pcmconf8xx_t *pcmp; uint *pgcrx; u32 pcmcia_phy_base; u32 pcmcia_phy_end; static unsigned long pcmcia_base = 0; unsigned long base; *p = 0; if (irq) *irq = 0; pcmp = (pcmconf8xx_t *)(&(((immap_t *)IMAP_ADDR)->im_pcmcia)); if (!pcmcia_base) { /* * Read out PCMCIA registers. Since the reset values * are undefined, we sure hope that they have been * set up by firmware */ /* Scan all registers for valid settings */ pcmcia_phy_base = 0xFFFFFFFF; pcmcia_phy_end = 0; /* br0 is start of brX and orX regs */ win = (pcmcia_win_t *) \ (&(((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pbr0)); for (i = 0; i < 8; i++) { if (win->or & 1) { /* This bank is marked as valid */ if (win->br < pcmcia_phy_base) { pcmcia_phy_base = win->br; } if ((win->br + PCMCIA_MEM_SIZE) > pcmcia_phy_end) { pcmcia_phy_end = win->br + PCMCIA_MEM_SIZE; } /* Check which slot that has been defined */ _slot_ = (win->or >> 2) & 1; } /* Valid bank */ win++; } /* for */ printk ("PCMCIA slot %c: phys mem %08x...%08x (size %08x)\n", 'A' + _slot_, pcmcia_phy_base, pcmcia_phy_end, pcmcia_phy_end - pcmcia_phy_base); pcmcia_base=(unsigned long)ioremap(pcmcia_phy_base, pcmcia_phy_end-pcmcia_phy_base); #ifdef DEBUG printk ("PCMCIA virt base: %08lx\n", pcmcia_base); #endif /* Compute clock cycles for PIO timings */ for (i=0; i<6; ++i) { bd_t *binfo = (bd_t *)__res; hold_time[i] = PCMCIA_MK_CLKS (hold_time[i], binfo->bi_busfreq); ide_pio_clocks[i].setup_time = PCMCIA_MK_CLKS (ide_pio_timings[i].setup_time, binfo->bi_busfreq); ide_pio_clocks[i].active_time = PCMCIA_MK_CLKS (ide_pio_timings[i].active_time, binfo->bi_busfreq); ide_pio_clocks[i].cycle_time = PCMCIA_MK_CLKS (ide_pio_timings[i].cycle_time, binfo->bi_busfreq); #if 0 printk ("PIO mode %d timings: %d/%d/%d => %d/%d/%d\n", i, ide_pio_clocks[i].setup_time, ide_pio_clocks[i].active_time, ide_pio_clocks[i].hold_time, ide_pio_clocks[i].cycle_time, ide_pio_timings[i].setup_time, ide_pio_timings[i].active_time, ide_pio_timings[i].hold_time, ide_pio_timings[i].cycle_time); #endif } } if (data_port >= MAX_HWIFS) return; if (_slot_ == -1) { printk ("PCMCIA slot has not been defined! Using A as default\n"); _slot_ = 0; } #ifdef CONFIG_IDE_8xx_PCCARD #ifdef DEBUG printk ("PIPR = 0x%08X slot %c ==> mask = 0x%X\n", pcmp->pcmc_pipr, 'A' + _slot_, M8XX_PCMCIA_CD1(_slot_) | M8XX_PCMCIA_CD2(_slot_) ); #endif /* DEBUG */ if (pcmp->pcmc_pipr & (M8XX_PCMCIA_CD1(_slot_)|M8XX_PCMCIA_CD2(_slot_))) { printk ("No card in slot %c: PIPR=%08x\n", 'A' + _slot_, (u32) pcmp->pcmc_pipr); return; /* No card in slot */ } check_ide_device (pcmcia_base); #endif /* CONFIG_IDE_8xx_PCCARD */ base = pcmcia_base + ioport_dsc[data_port].base_off; #ifdef DEBUG printk ("base: %08x + %08x = %08x\n", pcmcia_base, ioport_dsc[data_port].base_off, base); #endif for (i = 0; i < IDE_NR_PORTS; ++i) { #ifdef DEBUG printk ("port[%d]: %08x + %08x = %08x\n", i, base, ioport_dsc[data_port].reg_off[i], i, base + ioport_dsc[data_port].reg_off[i]); #endif *p++ = base + ioport_dsc[data_port].reg_off[i]; } if (irq) { #ifdef CONFIG_IDE_8xx_PCCARD unsigned int reg; *irq = ioport_dsc[data_port].irq; if (_slot_) pgcrx = &((immap_t *) IMAP_ADDR)->im_pcmcia.pcmc_pgcrb; else pgcrx = &((immap_t *) IMAP_ADDR)->im_pcmcia.pcmc_pgcra; reg = *pgcrx; reg |= mk_int_int_mask (pcmcia_schlvl) << 24; reg |= mk_int_int_mask (pcmcia_schlvl) << 16; *pgcrx = reg; #else /* direct connected IDE drive, i.e. external IRQ, not the PCMCIA irq */ *irq = ioport_dsc[data_port].irq; #endif /* CONFIG_IDE_8xx_PCCARD */ } /* register routine to tune PIO mode */ ide_hwifs[data_port].tuneproc = m8xx_ide_tuneproc; hw->ack_intr = (ide_ack_intr_t *) ide_interrupt_ack; /* Enable Harddisk Interrupt, * and make it edge sensitive */ /* (11-18) Set edge detect for irq, no wakeup from low power mode */ ((immap_t *)IMAP_ADDR)->im_siu_conf.sc_siel |= (0x80000000 >> ioport_dsc[data_port].irq); #ifdef CONFIG_IDE_8xx_PCCARD /* Make sure we dont get garbage irq */ ((immap_t *) IMAP_ADDR)->im_pcmcia.pcmc_pscr = 0xFFFF; /* Enable falling edge irq */ pcmp->pcmc_per = 0x100000 >> (16 * _slot_); #endif /* CONFIG_IDE_8xx_PCCARD */ } /* m8xx_ide_init_hwif_ports() using 8xx internal PCMCIA interface */ #endif /* CONFIG_IDE_8xx_PCCARD || CONFIG_IDE_8xx_DIRECT */ /* * m8xx_ide_init_hwif_ports for a direct IDE interface _not_ using * MPC8xx's internal PCMCIA interface */ #if defined(CONFIG_IDE_EXT_DIRECT) void m8xx_ide_init_hwif_ports (hw_regs_t *hw, ide_ioreg_t data_port, ide_ioreg_t ctrl_port, int *irq) { ide_ioreg_t *p = hw->io_ports; int i; u32 ide_phy_base; u32 ide_phy_end; static unsigned long ide_base = 0; unsigned long base; *p = 0; if (irq) *irq = 0; if (!ide_base) { /* TODO: * - add code to read ORx, BRx */ ide_phy_base = CFG_ATA_BASE_ADDR; ide_phy_end = CFG_ATA_BASE_ADDR + 0x200; printk ("IDE phys mem : %08x...%08x (size %08x)\n", ide_phy_base, ide_phy_end, ide_phy_end - ide_phy_base); ide_base=(unsigned long)ioremap(ide_phy_base, ide_phy_end-ide_phy_base); #ifdef DEBUG printk ("IDE virt base: %08lx\n", ide_base); #endif } if (data_port >= MAX_HWIFS) return; base = ide_base + ioport_dsc[data_port].base_off; #ifdef DEBUG printk ("base: %08x + %08x = %08x\n", ide_base, ioport_dsc[data_port].base_off, base); #endif for (i = 0; i < IDE_NR_PORTS; ++i) { #ifdef DEBUG printk ("port[%d]: %08x + %08x = %08x\n", i, base, ioport_dsc[data_port].reg_off[i], i, base + ioport_dsc[data_port].reg_off[i]); #endif *p++ = base + ioport_dsc[data_port].reg_off[i]; } if (irq) { /* direct connected IDE drive, i.e. external IRQ */ *irq = ioport_dsc[data_port].irq; } /* register routine to tune PIO mode */ ide_hwifs[data_port].tuneproc = m8xx_ide_tuneproc; hw->ack_intr = (ide_ack_intr_t *) ide_interrupt_ack; /* Enable Harddisk Interrupt, * and make it edge sensitive */ /* (11-18) Set edge detect for irq, no wakeup from low power mode */ ((immap_t *) IMAP_ADDR)->im_siu_conf.sc_siel |= (0x80000000 >> ioport_dsc[data_port].irq); } /* m8xx_ide_init_hwif_ports() for CONFIG_IDE_8xx_DIRECT */ #endif /* CONFIG_IDE_8xx_DIRECT */ /* -------------------------------------------------------------------- */ /* PCMCIA Timing */ #ifndef PCMCIA_SHT #define PCMCIA_SHT(t) ((t & 0x0F)<<16) /* Strobe Hold Time */ #define PCMCIA_SST(t) ((t & 0x0F)<<12) /* Strobe Setup Time */ #define PCMCIA_SL(t) ((t==32) ? 0 : ((t & 0x1F)<<7)) /* Strobe Length */ #endif /* Calculate PIO timings */ static void m8xx_ide_tuneproc(ide_drive_t *drive, byte pio) { ide_pio_data_t d; #if defined(CONFIG_IDE_8xx_PCCARD) || defined(CONFIG_IDE_8xx_DIRECT) volatile pcmconf8xx_t *pcmp; ulong timing, mask, reg; #endif pio = ide_get_best_pio_mode(drive, pio, 4, &d); #if 1 printk("%s[%d] %s: best PIO mode: %d\n", __FILE__,__LINE__,__FUNCTION__, pio); #endif #if defined(CONFIG_IDE_8xx_PCCARD) || defined(CONFIG_IDE_8xx_DIRECT) pcmp = (pcmconf8xx_t *)(&(((immap_t *)IMAP_ADDR)->im_pcmcia)); mask = ~(PCMCIA_SHT(0xFF) | PCMCIA_SST(0xFF) | PCMCIA_SL(0xFF)); timing = PCMCIA_SHT(hold_time[pio] ) | PCMCIA_SST(ide_pio_clocks[pio].setup_time ) | PCMCIA_SL (ide_pio_clocks[pio].active_time) ; #if 1 printk ("Setting timing bits 0x%08lx in PCMCIA controller\n", timing); #endif if ((reg = pcmp->pcmc_por0 & mask) != 0) pcmp->pcmc_por0 = reg | timing; if ((reg = pcmp->pcmc_por1 & mask) != 0) pcmp->pcmc_por1 = reg | timing; if ((reg = pcmp->pcmc_por2 & mask) != 0) pcmp->pcmc_por2 = reg | timing; if ((reg = pcmp->pcmc_por3 & mask) != 0) pcmp->pcmc_por3 = reg | timing; if ((reg = pcmp->pcmc_por4 & mask) != 0) pcmp->pcmc_por4 = reg | timing; if ((reg = pcmp->pcmc_por5 & mask) != 0) pcmp->pcmc_por5 = reg | timing; if ((reg = pcmp->pcmc_por6 & mask) != 0) pcmp->pcmc_por6 = reg | timing; if ((reg = pcmp->pcmc_por7 & mask) != 0) pcmp->pcmc_por7 = reg | timing; #elif defined(CONFIG_IDE_EXT_DIRECT) printk("%s[%d] %s: not implemented yet!\n", __FILE__,__LINE__,__FUNCTION__); #endif /* defined(CONFIG_IDE_8xx_PCCARD) || defined(CONFIG_IDE_8xx_PCMCIA */ } static void ide_interrupt_ack (void *dev) { #ifdef CONFIG_IDE_8xx_PCCARD u_int pscr, pipr; #if (PCMCIA_SOCKETS_NO == 2) u_int _slot_; #endif /* get interrupt sources */ pscr = ((volatile immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pscr; pipr = ((volatile immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pipr; /* * report only if both card detect signals are the same * not too nice done, * we depend on that CD2 is the bit to the left of CD1... */ if(_slot_==-1){ printk("PCMCIA slot has not been defined! Using A as default\n"); _slot_=0; } if(((pipr & M8XX_PCMCIA_CD2(_slot_)) >> 1) ^ (pipr & M8XX_PCMCIA_CD1(_slot_)) ) { printk ("card detect interrupt\n"); } /* clear the interrupt sources */ ((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pscr = pscr; #else /* ! CONFIG_IDE_8xx_PCCARD */ /* * Only CONFIG_IDE_8xx_PCCARD is using the interrupt of the * MPC8xx's PCMCIA controller, so there is nothing to be done here * for CONFIG_IDE_8xx_DIRECT and CONFIG_IDE_EXT_DIRECT. * The interrupt is handled somewhere else. -- Steven */ #endif /* CONFIG_IDE_8xx_PCCARD */ } /* * CIS Tupel codes */ #define CISTPL_NULL 0x00 #define CISTPL_DEVICE 0x01 #define CISTPL_LONGLINK_CB 0x02 #define CISTPL_INDIRECT 0x03 #define CISTPL_CONFIG_CB 0x04 #define CISTPL_CFTABLE_ENTRY_CB 0x05 #define CISTPL_LONGLINK_MFC 0x06 #define CISTPL_BAR 0x07 #define CISTPL_PWR_MGMNT 0x08 #define CISTPL_EXTDEVICE 0x09 #define CISTPL_CHECKSUM 0x10 #define CISTPL_LONGLINK_A 0x11 #define CISTPL_LONGLINK_C 0x12 #define CISTPL_LINKTARGET 0x13 #define CISTPL_NO_LINK 0x14 #define CISTPL_VERS_1 0x15 #define CISTPL_ALTSTR 0x16 #define CISTPL_DEVICE_A 0x17 #define CISTPL_JEDEC_C 0x18 #define CISTPL_JEDEC_A 0x19 #define CISTPL_CONFIG 0x1a #define CISTPL_CFTABLE_ENTRY 0x1b #define CISTPL_DEVICE_OC 0x1c #define CISTPL_DEVICE_OA 0x1d #define CISTPL_DEVICE_GEO 0x1e #define CISTPL_DEVICE_GEO_A 0x1f #define CISTPL_MANFID 0x20 #define CISTPL_FUNCID 0x21 #define CISTPL_FUNCE 0x22 #define CISTPL_SWIL 0x23 #define CISTPL_END 0xff /* * CIS Function ID codes */ #define CISTPL_FUNCID_MULTI 0x00 #define CISTPL_FUNCID_MEMORY 0x01 #define CISTPL_FUNCID_SERIAL 0x02 #define CISTPL_FUNCID_PARALLEL 0x03 #define CISTPL_FUNCID_FIXED 0x04 #define CISTPL_FUNCID_VIDEO 0x05 #define CISTPL_FUNCID_NETWORK 0x06 #define CISTPL_FUNCID_AIMS 0x07 #define CISTPL_FUNCID_SCSI 0x08 /* * Fixed Disk FUNCE codes */ #define CISTPL_IDE_INTERFACE 0x01 #define CISTPL_FUNCE_IDE_IFACE 0x01 #define CISTPL_FUNCE_IDE_MASTER 0x02 #define CISTPL_FUNCE_IDE_SLAVE 0x03 /* First feature byte */ #define CISTPL_IDE_SILICON 0x04 #define CISTPL_IDE_UNIQUE 0x08 #define CISTPL_IDE_DUAL 0x10 /* Second feature byte */ #define CISTPL_IDE_HAS_SLEEP 0x01 #define CISTPL_IDE_HAS_STANDBY 0x02 #define CISTPL_IDE_HAS_IDLE 0x04 #define CISTPL_IDE_LOW_POWER 0x08 #define CISTPL_IDE_REG_INHIBIT 0x10 #define CISTPL_IDE_HAS_INDEX 0x20 #define CISTPL_IDE_IOIS16 0x40 /* -------------------------------------------------------------------- */ #define MAX_TUPEL_SZ 512 #define MAX_FEATURES 4 static int check_ide_device (unsigned long base) { volatile unsigned char *ident = NULL; volatile unsigned char *feature_p[MAX_FEATURES]; volatile unsigned char *p, *start; int n_features = 0; unsigned char func_id = ~0; unsigned char code, len; unsigned short config_base = 0; int found = 0; int i; #ifdef DEBUG printk ("PCMCIA MEM: %08lX\n", base); #endif start = p = (volatile unsigned char *) base; while ((p - start) < MAX_TUPEL_SZ) { code = *p; p += 2; if (code == 0xFF) { /* End of chain */ break; } len = *p; p += 2; #ifdef DEBUG_PCMCIA { volatile unsigned char *q = p; printk ("\nTuple code %02x length %d\n\tData:", code, len); for (i = 0; i < len; ++i) { printk (" %02x", *q); q+= 2; } } #endif /* DEBUG_PCMCIA */ switch (code) { case CISTPL_VERS_1: ident = p + 4; break; case CISTPL_FUNCID: func_id = *p; break; case CISTPL_FUNCE: if (n_features < MAX_FEATURES) feature_p[n_features++] = p; break; case CISTPL_CONFIG: config_base = (*(p+6) << 8) + (*(p+4)); default: break; } p += 2 * len; } found = identify (ident); if (func_id != ((unsigned char)~0)) { print_funcid (func_id); if (func_id == CISTPL_FUNCID_FIXED) found = 1; else return (1); /* no disk drive */ } for (i=0; i id_str) { if (*t == ' ') *t = '\0'; else break; } printk ("Card ID: %s\n", id_str); for (card=known_cards; *card; ++card) { if (strcmp(*card, id_str) == 0) { /* found! */ return (1); } } return (0); /* don't know */ } void m8xx_ide_init(void) { ppc_ide_md.default_irq = m8xx_ide_default_irq; ppc_ide_md.default_io_base = m8xx_ide_default_io_base; ppc_ide_md.ide_init_hwif = m8xx_ide_init_hwif_ports; }