1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License.  See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * This file contains the MIPS architecture specific IDE code.
7 *
8 * Copyright (C) 1994-1996  Linus Torvalds & authors
9 */
10#ifndef __ASM_IDE_H
11#define __ASM_IDE_H
12
13#ifdef __KERNEL__
14
15#include <linux/config.h>
16#include <asm/io.h>
17
18#ifndef MAX_HWIFS
19# ifdef CONFIG_BLK_DEV_IDEPCI
20#define MAX_HWIFS	10
21# else
22#define MAX_HWIFS	6
23# endif
24#endif
25
26#define ide__sti()	__sti()
27
28struct ide_ops {
29	int (*ide_default_irq)(ide_ioreg_t base);
30	ide_ioreg_t (*ide_default_io_base)(int index);
31	void (*ide_init_hwif_ports)(hw_regs_t *hw, ide_ioreg_t data_port,
32	                            ide_ioreg_t ctrl_port, int *irq);
33	int (*ide_request_irq)(unsigned int irq, void (*handler)(int, void *,
34	                       struct pt_regs *), unsigned long flags,
35	                       const char *device, void *dev_id);
36	void (*ide_free_irq)(unsigned int irq, void *dev_id);
37	int (*ide_check_region) (ide_ioreg_t from, unsigned int extent);
38	void (*ide_request_region)(ide_ioreg_t from, unsigned int extent,
39	                           const char *name);
40	void (*ide_release_region)(ide_ioreg_t from, unsigned int extent);
41};
42
43extern struct ide_ops *ide_ops;
44
45static __inline__ int ide_default_irq(ide_ioreg_t base)
46{
47	return ide_ops->ide_default_irq(base);
48}
49
50static __inline__ ide_ioreg_t ide_default_io_base(int index)
51{
52	return ide_ops->ide_default_io_base(index);
53}
54
55static inline void ide_init_hwif_ports(hw_regs_t *hw, ide_ioreg_t data_port,
56	ide_ioreg_t ctrl_port, int *irq)
57{
58	ide_ops->ide_init_hwif_ports(hw, data_port, ctrl_port, irq);
59}
60
61static __inline__ void ide_init_default_hwifs(void)
62{
63#ifndef CONFIG_BLK_DEV_IDEPCI
64	hw_regs_t hw;
65	int index;
66
67	for(index = 0; index < MAX_HWIFS; index++) {
68		ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, NULL);
69		hw.irq = ide_default_irq(ide_default_io_base(index));
70		ide_register_hw(&hw, NULL);
71	}
72#endif /* CONFIG_BLK_DEV_IDEPCI */
73}
74
75typedef union {
76	unsigned all			: 8;	/* all of the bits together */
77	struct {
78#ifdef __MIPSEB__
79		unsigned bit7		: 1;	/* always 1 */
80		unsigned lba		: 1;	/* using LBA instead of CHS */
81		unsigned bit5		: 1;	/* always 1 */
82		unsigned unit		: 1;	/* drive select number, 0 or 1 */
83		unsigned head		: 4;	/* always zeros here */
84#else
85		unsigned head		: 4;	/* always zeros here */
86		unsigned unit		: 1;	/* drive select number, 0 or 1 */
87		unsigned bit5		: 1;	/* always 1 */
88		unsigned lba		: 1;	/* using LBA instead of CHS */
89		unsigned bit7		: 1;	/* always 1 */
90#endif
91	} b;
92} select_t;
93
94typedef union {
95	unsigned all			: 8;	/* all of the bits together */
96	struct {
97#ifdef __MIPSEB__
98		unsigned HOB		: 1;	/* 48-bit address ordering */
99		unsigned reserved456	: 3;
100		unsigned bit3		: 1;	/* ATA-2 thingy */
101		unsigned SRST		: 1;	/* host soft reset bit */
102		unsigned nIEN		: 1;	/* device INTRQ to host */
103		unsigned bit0		: 1;
104#else
105		unsigned bit0		: 1;
106		unsigned nIEN		: 1;	/* device INTRQ to host */
107		unsigned SRST		: 1;	/* host soft reset bit */
108		unsigned bit3		: 1;	/* ATA-2 thingy */
109		unsigned reserved456	: 3;
110		unsigned HOB		: 1;	/* 48-bit address ordering */
111#endif
112	} b;
113} control_t;
114
115static __inline__ int ide_request_irq(unsigned int irq, void (*handler)(int,void *, struct pt_regs *),
116			unsigned long flags, const char *device, void *dev_id)
117{
118	return ide_ops->ide_request_irq(irq, handler, flags, device, dev_id);
119}
120
121static __inline__ void ide_free_irq(unsigned int irq, void *dev_id)
122{
123	ide_ops->ide_free_irq(irq, dev_id);
124}
125
126static __inline__ int ide_check_region (ide_ioreg_t from, unsigned int extent)
127{
128	return ide_ops->ide_check_region(from, extent);
129}
130
131static __inline__ void ide_request_region(ide_ioreg_t from, unsigned int extent,
132	const char *name)
133{
134	ide_ops->ide_request_region(from, extent, name);
135}
136
137static __inline__ void ide_release_region(ide_ioreg_t from, unsigned int extent)
138{
139	ide_ops->ide_release_region(from, extent);
140}
141
142#if defined(CONFIG_SWAP_IO_SPACE_L) && defined(__MIPSEB__)
143
144/* get rid of defs from io.h - ide has its private and conflicting versions */
145#ifdef insw
146#undef insw
147#endif
148#ifdef outsw
149#undef outsw
150#endif
151#ifdef insl
152#undef insl
153#endif
154#ifdef outsl
155#undef outsl
156#endif
157
158#define insw(port, addr, count) ide_insw(port, addr, count)
159#define insl(port, addr, count) ide_insl(port, addr, count)
160#define outsw(port, addr, count) ide_outsw(port, addr, count)
161#define outsl(port, addr, count) ide_outsl(port, addr, count)
162
163static inline void ide_insw(unsigned long port, void *addr, unsigned int count)
164{
165	while (count--) {
166		*(u16 *)addr = *(volatile u16 *)(mips_io_port_base + port);
167		addr += 2;
168	}
169}
170
171static inline void ide_outsw(unsigned long port, void *addr, unsigned int count)
172{
173	while (count--) {
174		*(volatile u16 *)(mips_io_port_base + (port)) = *(u16 *)addr;
175		addr += 2;
176	}
177}
178
179static inline void ide_insl(unsigned long port, void *addr, unsigned int count)
180{
181	while (count--) {
182		*(u32 *)addr = *(volatile u32 *)(mips_io_port_base + port);
183		addr += 4;
184	}
185}
186
187static inline void ide_outsl(unsigned long port, void *addr, unsigned int count)
188{
189	while (count--) {
190		*(volatile u32 *)(mips_io_port_base + (port)) = *(u32 *)addr;
191		addr += 4;
192	}
193}
194
195#define T_CHAR          (0x0000)        /* char:  don't touch  */
196#define T_SHORT         (0x4000)        /* short: 12 -> 21     */
197#define T_INT           (0x8000)        /* int:   1234 -> 4321 */
198#define T_TEXT          (0xc000)        /* text:  12 -> 21     */
199
200#define T_MASK_TYPE     (0xc000)
201#define T_MASK_COUNT    (0x3fff)
202
203#define D_CHAR(cnt)     (T_CHAR  | (cnt))
204#define D_SHORT(cnt)    (T_SHORT | (cnt))
205#define D_INT(cnt)      (T_INT   | (cnt))
206#define D_TEXT(cnt)     (T_TEXT  | (cnt))
207
208static u_short driveid_types[] = {
209	D_SHORT(10),	/* config - vendor2 */
210	D_TEXT(20),	/* serial_no */
211	D_SHORT(3),	/* buf_type - ecc_bytes */
212	D_TEXT(48),	/* fw_rev - model */
213	D_CHAR(2),	/* max_multsect - vendor3 */
214	D_SHORT(1),	/* dword_io */
215	D_CHAR(2),	/* vendor4 - capability */
216	D_SHORT(1),	/* reserved50 */
217	D_CHAR(4),	/* vendor5 - tDMA */
218	D_SHORT(4),	/* field_valid - cur_sectors */
219	D_INT(1),	/* cur_capacity */
220	D_CHAR(2),	/* multsect - multsect_valid */
221	D_INT(1),	/* lba_capacity */
222	D_SHORT(194)	/* dma_1word - reservedyy */
223};
224
225#define num_driveid_types       (sizeof(driveid_types)/sizeof(*driveid_types))
226
227static __inline__ void ide_fix_driveid(struct hd_driveid *id)
228{
229	u_char *p = (u_char *)id;
230	int i, j, cnt;
231	u_char t;
232
233	for (i = 0; i < num_driveid_types; i++) {
234		cnt = driveid_types[i] & T_MASK_COUNT;
235		switch (driveid_types[i] & T_MASK_TYPE) {
236		case T_CHAR:
237			p += cnt;
238			break;
239		case T_SHORT:
240			for (j = 0; j < cnt; j++) {
241				t = p[0];
242				p[0] = p[1];
243				p[1] = t;
244				p += 2;
245			}
246			break;
247		case T_INT:
248			for (j = 0; j < cnt; j++) {
249				t = p[0];
250				p[0] = p[3];
251				p[3] = t;
252				t = p[1];
253				p[1] = p[2];
254				p[2] = t;
255				p += 4;
256			}
257			break;
258		case T_TEXT:
259			for (j = 0; j < cnt; j += 2) {
260				t = p[0];
261				p[0] = p[1];
262				p[1] = t;
263				p += 2;
264			}
265			break;
266		};
267	}
268}
269
270#else /* defined(CONFIG_SWAP_IO_SPACE) && defined(__MIPSEB__)  */
271
272#define ide_fix_driveid(id)		do {} while (0)
273
274#endif
275
276/*
277 * The following are not needed for the non-m68k ports
278 */
279#define ide_ack_intr(hwif)		(1)
280#define ide_release_lock(lock)		do {} while (0)
281#define ide_get_lock(lock, hdlr, data)	do {} while (0)
282
283#endif /* __KERNEL__ */
284
285#endif /* __ASM_IDE_H */
286