ide.h
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上传日期:2013-02-24
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- /*
- * linux/include/asm-m68k/ide.h
- *
- * Copyright (C) 1994-1996 Linus Torvalds & authors
- */
-
- /* Copyright(c) 1996 Kars de Jong */
- /* Based on the ide driver from 1.2.13pl8 */
- /*
- * Credits (alphabetical):
- *
- * - Bjoern Brauel
- * - Kars de Jong
- * - Torsten Ebeling
- * - Dwight Engen
- * - Thorsten Floeck
- * - Roman Hodek
- * - Guenther Kelleter
- * - Chris Lawrence
- * - Michael Rausch
- * - Christian Sauer
- * - Michael Schmitz
- * - Jes Soerensen
- * - Michael Thurm
- * - Geert Uytterhoeven
- */
- #ifndef _M68K_IDE_H
- #define _M68K_IDE_H
- #ifdef __KERNEL__
- #include <linux/config.h>
- #include <asm/setup.h>
- #include <asm/io.h>
- #include <asm/irq.h>
- #ifdef CONFIG_ATARI
- #include <linux/interrupt.h>
- #include <asm/atari_stdma.h>
- #endif
- #ifdef CONFIG_MAC
- #include <asm/macints.h>
- #endif
- #ifndef MAX_HWIFS
- #define MAX_HWIFS 4 /* same as the other archs */
- #endif
- static __inline__ int ide_default_irq(ide_ioreg_t base)
- {
- return 0;
- }
- static __inline__ ide_ioreg_t ide_default_io_base(int index)
- {
- return 0;
- }
- /*
- * Set up a hw structure for a specified data port, control port and IRQ.
- * This should follow whatever the default interface uses.
- */
- static __inline__ void ide_init_hwif_ports(hw_regs_t *hw, ide_ioreg_t data_port, ide_ioreg_t ctrl_port, int *irq)
- {
- if (data_port || ctrl_port)
- printk("ide_init_hwif_ports: must not be calledn");
- }
- /*
- * This registers the standard ports for this architecture with the IDE
- * driver.
- */
- static __inline__ void ide_init_default_hwifs(void)
- {
- }
- typedef union {
- unsigned all : 8; /* all of the bits together */
- struct {
- unsigned bit7 : 1; /* always 1 */
- unsigned lba : 1; /* using LBA instead of CHS */
- unsigned bit5 : 1; /* always 1 */
- unsigned unit : 1; /* drive select number, 0 or 1 */
- unsigned head : 4; /* always zeros here */
- } b;
- } select_t;
- static __inline__ int ide_request_irq(unsigned int irq, void (*handler)(int, void *, struct pt_regs *),
- unsigned long flags, const char *device, void *dev_id)
- {
- #ifdef CONFIG_AMIGA
- if (MACH_IS_AMIGA)
- return request_irq(irq, handler, 0, device, dev_id);
- #endif /* CONFIG_AMIGA */
- #ifdef CONFIG_Q40
- if (MACH_IS_Q40)
- return request_irq(irq, handler, 0, device, dev_id);
- #endif /* CONFIG_Q40*/
- #ifdef CONFIG_MAC
- if (MACH_IS_MAC)
- return request_irq(irq, handler, 0, device, dev_id);
- #endif /* CONFIG_MAC */
- return 0;
- }
- static __inline__ void ide_free_irq(unsigned int irq, void *dev_id)
- {
- #ifdef CONFIG_AMIGA
- if (MACH_IS_AMIGA)
- free_irq(irq, dev_id);
- #endif /* CONFIG_AMIGA */
- #ifdef CONFIG_Q40
- if (MACH_IS_Q40)
- free_irq(irq, dev_id);
- #endif /* CONFIG_Q40*/
- #ifdef CONFIG_MAC
- if (MACH_IS_MAC)
- free_irq(irq, dev_id);
- #endif /* CONFIG_MAC */
- }
- /*
- * We should really implement those some day.
- */
- static __inline__ int ide_check_region (ide_ioreg_t from, unsigned int extent)
- {
- return 0;
- }
- static __inline__ void ide_request_region (ide_ioreg_t from, unsigned int extent, const char *name)
- {
- #ifdef CONFIG_Q40
- if (MACH_IS_Q40)
- request_region((q40ide_ioreg_t)from,extent,name);
- #endif
- }
- static __inline__ void ide_release_region (ide_ioreg_t from, unsigned int extent)
- {
- #ifdef CONFIG_Q40
- if (MACH_IS_Q40)
- release_region((q40ide_ioreg_t)from,extent);
- #endif
- }
- #undef SUPPORT_SLOW_DATA_PORTS
- #define SUPPORT_SLOW_DATA_PORTS 0
- #undef SUPPORT_VLB_SYNC
- #define SUPPORT_VLB_SYNC 0
- /* this definition is used only on startup .. */
- #undef HD_DATA
- #define HD_DATA NULL
- /* get rid of defs from io.h - ide has its private and conflicting versions */
- #undef inb
- #undef inw
- #undef outb
- #undef outw
- #undef inb_p
- #undef outb_p
- #undef insw
- #undef outsw
- #undef insw_swapw
- #undef outsw_swapw
- /*
- * define IO method and translation,
- * so far only Q40 has ide-if on ISA
- */
- #ifndef CONFIG_Q40
- #define ADDR_TRANS_B(_addr_) (_addr_)
- #define ADDR_TRANS_W(_addr_) (_addr_)
- #else
- #define ADDR_TRANS_B(_addr_) (MACH_IS_Q40 ? ((unsigned char *)Q40_ISA_IO_B(_addr_)) : (_addr_))
- #define ADDR_TRANS_W(_addr_) (MACH_IS_Q40 ? ((unsigned char *)Q40_ISA_IO_W(_addr_)) : (_addr_))
- #endif
- #define inb(p) in_8(ADDR_TRANS_B(p))
- #define inb_p(p) in_8(ADDR_TRANS_B(p))
- #define inw(p) in_be16(ADDR_TRANS_W(p))
- #define outb(v,p) out_8(ADDR_TRANS_B(p),v)
- #define outb_p(v,p) out_8(ADDR_TRANS_B(p),v)
- #define outw(v,p) out_be16(ADDR_TRANS_W(p),v)
- #define insw(port, buf, nr) raw_insw(ADDR_TRANS_W(port), buf, nr)
- #define outsw(port, buf, nr) raw_outsw(ADDR_TRANS_W(port), buf, nr)
- #define insl(data_reg, buffer, wcount) insw(data_reg, buffer, (wcount)<<1)
- #define outsl(data_reg, buffer, wcount) outsw(data_reg, buffer, (wcount)<<1)
- #if defined(CONFIG_ATARI) || defined(CONFIG_Q40)
- #define insl_swapw(data_reg, buffer, wcount)
- insw_swapw(data_reg, buffer, (wcount)<<1)
- #define outsl_swapw(data_reg, buffer, wcount)
- outsw_swapw(data_reg, buffer, (wcount)<<1)
- #define insw_swapw(port, buf, nr) raw_insw_swapw(ADDR_TRANS_W(port), buf, nr)
- #define outsw_swapw(port, buf, nr) raw_outsw_swapw(ADDR_TRANS_W(port),buf,nr)
- #endif /* CONFIG_ATARI || CONFIG_Q40 */
- #define T_CHAR (0x0000) /* char: don't touch */
- #define T_SHORT (0x4000) /* short: 12 -> 21 */
- #define T_INT (0x8000) /* int: 1234 -> 4321 */
- #define T_TEXT (0xc000) /* text: 12 -> 21 */
- #define T_MASK_TYPE (0xc000)
- #define T_MASK_COUNT (0x3fff)
- #define D_CHAR(cnt) (T_CHAR | (cnt))
- #define D_SHORT(cnt) (T_SHORT | (cnt))
- #define D_INT(cnt) (T_INT | (cnt))
- #define D_TEXT(cnt) (T_TEXT | (cnt))
- /* Q40 and Atari have byteswapped IDE bus and since many interesting
- * values in the identification string are text, chars and words they
- * happened to be almost correct without swapping.. However *_capacity
- * is needed for drives over 8 GB. RZ */
- #if defined(CONFIG_Q40) || defined(CONFIG_ATARI)
- #define M68K_IDE_SWAPW (MACH_IS_Q40 || MACH_IS_ATARI)
- #endif
- #if defined(CONFIG_AMIGA) || defined (CONFIG_MAC) || defined(M68K_IDE_SWAPW)
- static u_short driveid_types[] = {
- D_SHORT(10), /* config - vendor2 */
- D_TEXT(20), /* serial_no */
- D_SHORT(3), /* buf_type, buf_size - ecc_bytes */
- D_TEXT(48), /* fw_rev - model */
- D_CHAR(2), /* max_multsect - vendor3 */
- D_SHORT(1), /* dword_io */
- D_CHAR(2), /* vendor4 - capability */
- D_SHORT(1), /* reserved50 */
- D_CHAR(4), /* vendor5 - tDMA */
- D_SHORT(4), /* field_valid - cur_sectors */
- D_INT(1), /* cur_capacity */
- D_CHAR(2), /* multsect - multsect_valid */
- D_INT(1), /* lba_capacity */
- D_SHORT(194) /* dma_1word - reserved */
- };
- #define num_driveid_types (sizeof(driveid_types)/sizeof(*driveid_types))
- #endif /* CONFIG_AMIGA */
- static __inline__ void ide_fix_driveid(struct hd_driveid *id)
- {
- #if defined(CONFIG_AMIGA) || defined (CONFIG_MAC) || defined(M68K_IDE_SWAPW)
- u_char *p = (u_char *)id;
- int i, j, cnt;
- u_char t;
- if (!MACH_IS_AMIGA && !MACH_IS_MAC && !MACH_IS_Q40 && !MACH_IS_ATARI)
- return;
- #ifdef M68K_IDE_SWAPW
- if (M68K_IDE_SWAPW) /* fix bus byteorder first */
- for (i=0; i < 512; i+=2) {
- t = p[i]; p[i] = p[i+1]; p[i+1] = t;
- }
- #endif
- for (i = 0; i < num_driveid_types; i++) {
- cnt = driveid_types[i] & T_MASK_COUNT;
- switch (driveid_types[i] & T_MASK_TYPE) {
- case T_CHAR:
- p += cnt;
- break;
- case T_SHORT:
- for (j = 0; j < cnt; j++) {
- t = p[0];
- p[0] = p[1];
- p[1] = t;
- p += 2;
- }
- break;
- case T_INT:
- for (j = 0; j < cnt; j++) {
- t = p[0];
- p[0] = p[3];
- p[3] = t;
- t = p[1];
- p[1] = p[2];
- p[2] = t;
- p += 4;
- }
- break;
- case T_TEXT:
- for (j = 0; j < cnt; j += 2) {
- t = p[0];
- p[0] = p[1];
- p[1] = t;
- p += 2;
- }
- break;
- }
- }
- #endif /* CONFIG_AMIGA */
- }
- static __inline__ void ide_release_lock (int *ide_lock)
- {
- #ifdef CONFIG_ATARI
- if (MACH_IS_ATARI) {
- if (*ide_lock == 0) {
- printk("ide_release_lock: bugn");
- return;
- }
- *ide_lock = 0;
- stdma_release();
- }
- #endif /* CONFIG_ATARI */
- }
- static __inline__ void ide_get_lock (int *ide_lock, void (*handler)(int, void *, struct pt_regs *), void *data)
- {
- #ifdef CONFIG_ATARI
- if (MACH_IS_ATARI) {
- if (*ide_lock == 0) {
- if (in_interrupt() > 0)
- panic( "Falcon IDE hasn't ST-DMA lock in interrupt" );
- stdma_lock(handler, data);
- *ide_lock = 1;
- }
- }
- #endif /* CONFIG_ATARI */
- }
- #define ide_ack_intr(hwif) ((hwif)->hw.ack_intr ? (hwif)->hw.ack_intr(hwif) : 1)
- /*
- * On the Atari, we sometimes can't enable interrupts:
- */
- /* MSch: changed sti() to STI() wherever possible in ide.c; moved STI() def.
- * to asm/ide.h
- */
- /* The Atari interrupt structure strictly requires that the IPL isn't lowered
- * uncontrolled in an interrupt handler. In the concrete case, the IDE
- * interrupt is already a slow int, so the irq is already disabled at the time
- * the handler is called, and the IPL has been lowered to the minimum value
- * possible. To avoid going below that, STI() checks for being called inside
- * an interrupt, and in that case it does nothing. Hope that is reasonable and
- * works. (Roman)
- */
- #ifdef MACH_ATARI_ONLY
- #define ide__sti()
- do {
- if (!in_interrupt()) __sti();
- } while(0)
- #elif defined(CONFIG_ATARI)
- #define ide__sti()
- do {
- if (!MACH_IS_ATARI || !in_interrupt()) sti();
- } while(0)
- #else /* !defined(CONFIG_ATARI) */
- #define ide__sti() __sti()
- #endif
- #endif /* __KERNEL__ */
- #endif /* _M68K_IDE_H */