2 #include <linux/kernel.h>
5 #if defined(CONFIG_ARM) || defined(CONFIG_M68K) || defined(CONFIG_MIPS) || \
6 defined(CONFIG_PARISC) || defined(CONFIG_PPC) || defined(CONFIG_SPARC)
9 #include <asm-generic/ide_iops.h>
13 * Conventional PIO operations for ATA devices
16 static u8
ide_inb(unsigned long port
)
18 return (u8
) inb(port
);
21 static void ide_outb(u8 val
, unsigned long port
)
27 * MMIO operations, typically used for SATA controllers
30 static u8
ide_mm_inb(unsigned long port
)
32 return (u8
) readb((void __iomem
*) port
);
35 static void ide_mm_outb(u8 value
, unsigned long port
)
37 writeb(value
, (void __iomem
*) port
);
40 void ide_exec_command(ide_hwif_t
*hwif
, u8 cmd
)
42 if (hwif
->host_flags
& IDE_HFLAG_MMIO
)
43 writeb(cmd
, (void __iomem
*)hwif
->io_ports
.command_addr
);
45 outb(cmd
, hwif
->io_ports
.command_addr
);
47 EXPORT_SYMBOL_GPL(ide_exec_command
);
49 u8
ide_read_status(ide_hwif_t
*hwif
)
51 if (hwif
->host_flags
& IDE_HFLAG_MMIO
)
52 return readb((void __iomem
*)hwif
->io_ports
.status_addr
);
54 return inb(hwif
->io_ports
.status_addr
);
56 EXPORT_SYMBOL_GPL(ide_read_status
);
58 u8
ide_read_altstatus(ide_hwif_t
*hwif
)
60 if (hwif
->host_flags
& IDE_HFLAG_MMIO
)
61 return readb((void __iomem
*)hwif
->io_ports
.ctl_addr
);
63 return inb(hwif
->io_ports
.ctl_addr
);
65 EXPORT_SYMBOL_GPL(ide_read_altstatus
);
67 void ide_write_devctl(ide_hwif_t
*hwif
, u8 ctl
)
69 if (hwif
->host_flags
& IDE_HFLAG_MMIO
)
70 writeb(ctl
, (void __iomem
*)hwif
->io_ports
.ctl_addr
);
72 outb(ctl
, hwif
->io_ports
.ctl_addr
);
74 EXPORT_SYMBOL_GPL(ide_write_devctl
);
76 void ide_tf_load(ide_drive_t
*drive
, struct ide_cmd
*cmd
)
78 ide_hwif_t
*hwif
= drive
->hwif
;
79 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
80 struct ide_taskfile
*tf
= &cmd
->tf
;
81 void (*tf_outb
)(u8 addr
, unsigned long port
);
82 u8 mmio
= (hwif
->host_flags
& IDE_HFLAG_MMIO
) ? 1 : 0;
83 u8 HIHI
= (cmd
->tf_flags
& IDE_TFLAG_LBA48
) ? 0xE0 : 0xEF;
86 tf_outb
= ide_mm_outb
;
90 if (cmd
->ftf_flags
& IDE_FTFLAG_FLAGGED
)
93 if (cmd
->tf_flags
& IDE_TFLAG_OUT_HOB_FEATURE
)
94 tf_outb(tf
->hob_feature
, io_ports
->feature_addr
);
95 if (cmd
->tf_flags
& IDE_TFLAG_OUT_HOB_NSECT
)
96 tf_outb(tf
->hob_nsect
, io_ports
->nsect_addr
);
97 if (cmd
->tf_flags
& IDE_TFLAG_OUT_HOB_LBAL
)
98 tf_outb(tf
->hob_lbal
, io_ports
->lbal_addr
);
99 if (cmd
->tf_flags
& IDE_TFLAG_OUT_HOB_LBAM
)
100 tf_outb(tf
->hob_lbam
, io_ports
->lbam_addr
);
101 if (cmd
->tf_flags
& IDE_TFLAG_OUT_HOB_LBAH
)
102 tf_outb(tf
->hob_lbah
, io_ports
->lbah_addr
);
104 if (cmd
->tf_flags
& IDE_TFLAG_OUT_FEATURE
)
105 tf_outb(tf
->feature
, io_ports
->feature_addr
);
106 if (cmd
->tf_flags
& IDE_TFLAG_OUT_NSECT
)
107 tf_outb(tf
->nsect
, io_ports
->nsect_addr
);
108 if (cmd
->tf_flags
& IDE_TFLAG_OUT_LBAL
)
109 tf_outb(tf
->lbal
, io_ports
->lbal_addr
);
110 if (cmd
->tf_flags
& IDE_TFLAG_OUT_LBAM
)
111 tf_outb(tf
->lbam
, io_ports
->lbam_addr
);
112 if (cmd
->tf_flags
& IDE_TFLAG_OUT_LBAH
)
113 tf_outb(tf
->lbah
, io_ports
->lbah_addr
);
115 if (cmd
->tf_flags
& IDE_TFLAG_OUT_DEVICE
)
116 tf_outb((tf
->device
& HIHI
) | drive
->select
,
117 io_ports
->device_addr
);
119 EXPORT_SYMBOL_GPL(ide_tf_load
);
121 void ide_tf_read(ide_drive_t
*drive
, struct ide_cmd
*cmd
)
123 ide_hwif_t
*hwif
= drive
->hwif
;
124 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
125 struct ide_taskfile
*tf
= &cmd
->tf
;
126 void (*tf_outb
)(u8 addr
, unsigned long port
);
127 u8 (*tf_inb
)(unsigned long port
);
128 u8 mmio
= (hwif
->host_flags
& IDE_HFLAG_MMIO
) ? 1 : 0;
131 tf_outb
= ide_mm_outb
;
138 /* be sure we're looking at the low order bits */
139 tf_outb(ATA_DEVCTL_OBS
, io_ports
->ctl_addr
);
141 if (cmd
->tf_flags
& IDE_TFLAG_IN_ERROR
)
142 tf
->error
= tf_inb(io_ports
->feature_addr
);
143 if (cmd
->tf_flags
& IDE_TFLAG_IN_NSECT
)
144 tf
->nsect
= tf_inb(io_ports
->nsect_addr
);
145 if (cmd
->tf_flags
& IDE_TFLAG_IN_LBAL
)
146 tf
->lbal
= tf_inb(io_ports
->lbal_addr
);
147 if (cmd
->tf_flags
& IDE_TFLAG_IN_LBAM
)
148 tf
->lbam
= tf_inb(io_ports
->lbam_addr
);
149 if (cmd
->tf_flags
& IDE_TFLAG_IN_LBAH
)
150 tf
->lbah
= tf_inb(io_ports
->lbah_addr
);
151 if (cmd
->tf_flags
& IDE_TFLAG_IN_DEVICE
)
152 tf
->device
= tf_inb(io_ports
->device_addr
);
154 if (cmd
->tf_flags
& IDE_TFLAG_LBA48
) {
155 tf_outb(ATA_HOB
| ATA_DEVCTL_OBS
, io_ports
->ctl_addr
);
157 if (cmd
->tf_flags
& IDE_TFLAG_IN_HOB_ERROR
)
158 tf
->hob_error
= tf_inb(io_ports
->feature_addr
);
159 if (cmd
->tf_flags
& IDE_TFLAG_IN_HOB_NSECT
)
160 tf
->hob_nsect
= tf_inb(io_ports
->nsect_addr
);
161 if (cmd
->tf_flags
& IDE_TFLAG_IN_HOB_LBAL
)
162 tf
->hob_lbal
= tf_inb(io_ports
->lbal_addr
);
163 if (cmd
->tf_flags
& IDE_TFLAG_IN_HOB_LBAM
)
164 tf
->hob_lbam
= tf_inb(io_ports
->lbam_addr
);
165 if (cmd
->tf_flags
& IDE_TFLAG_IN_HOB_LBAH
)
166 tf
->hob_lbah
= tf_inb(io_ports
->lbah_addr
);
169 EXPORT_SYMBOL_GPL(ide_tf_read
);
172 * Some localbus EIDE interfaces require a special access sequence
173 * when using 32-bit I/O instructions to transfer data. We call this
174 * the "vlb_sync" sequence, which consists of three successive reads
175 * of the sector count register location, with interrupts disabled
176 * to ensure that the reads all happen together.
178 static void ata_vlb_sync(unsigned long port
)
186 * This is used for most PIO data transfers *from* the IDE interface
188 * These routines will round up any request for an odd number of bytes,
189 * so if an odd len is specified, be sure that there's at least one
190 * extra byte allocated for the buffer.
192 void ide_input_data(ide_drive_t
*drive
, struct ide_cmd
*cmd
, void *buf
,
195 ide_hwif_t
*hwif
= drive
->hwif
;
196 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
197 unsigned long data_addr
= io_ports
->data_addr
;
198 unsigned int words
= (len
+ 1) >> 1;
199 u8 io_32bit
= drive
->io_32bit
;
200 u8 mmio
= (hwif
->host_flags
& IDE_HFLAG_MMIO
) ? 1 : 0;
203 unsigned long uninitialized_var(flags
);
205 if ((io_32bit
& 2) && !mmio
) {
206 local_irq_save(flags
);
207 ata_vlb_sync(io_ports
->nsect_addr
);
212 __ide_mm_insl((void __iomem
*)data_addr
, buf
, words
);
214 insl(data_addr
, buf
, words
);
216 if ((io_32bit
& 2) && !mmio
)
217 local_irq_restore(flags
);
219 if (((len
+ 1) & 3) < 2)
227 __ide_mm_insw((void __iomem
*)data_addr
, buf
, words
);
229 insw(data_addr
, buf
, words
);
231 EXPORT_SYMBOL_GPL(ide_input_data
);
234 * This is used for most PIO data transfers *to* the IDE interface
236 void ide_output_data(ide_drive_t
*drive
, struct ide_cmd
*cmd
, void *buf
,
239 ide_hwif_t
*hwif
= drive
->hwif
;
240 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
241 unsigned long data_addr
= io_ports
->data_addr
;
242 unsigned int words
= (len
+ 1) >> 1;
243 u8 io_32bit
= drive
->io_32bit
;
244 u8 mmio
= (hwif
->host_flags
& IDE_HFLAG_MMIO
) ? 1 : 0;
247 unsigned long uninitialized_var(flags
);
249 if ((io_32bit
& 2) && !mmio
) {
250 local_irq_save(flags
);
251 ata_vlb_sync(io_ports
->nsect_addr
);
256 __ide_mm_outsl((void __iomem
*)data_addr
, buf
, words
);
258 outsl(data_addr
, buf
, words
);
260 if ((io_32bit
& 2) && !mmio
)
261 local_irq_restore(flags
);
263 if (((len
+ 1) & 3) < 2)
271 __ide_mm_outsw((void __iomem
*)data_addr
, buf
, words
);
273 outsw(data_addr
, buf
, words
);
275 EXPORT_SYMBOL_GPL(ide_output_data
);
277 const struct ide_tp_ops default_tp_ops
= {
278 .exec_command
= ide_exec_command
,
279 .read_status
= ide_read_status
,
280 .read_altstatus
= ide_read_altstatus
,
281 .write_devctl
= ide_write_devctl
,
283 .tf_load
= ide_tf_load
,
284 .tf_read
= ide_tf_read
,
286 .input_data
= ide_input_data
,
287 .output_data
= ide_output_data
,