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_dev_select(ide_drive_t
*drive
)
78 ide_hwif_t
*hwif
= drive
->hwif
;
79 u8 select
= drive
->select
| ATA_DEVICE_OBS
;
81 if (hwif
->host_flags
& IDE_HFLAG_MMIO
)
82 writeb(select
, (void __iomem
*)hwif
->io_ports
.device_addr
);
84 outb(select
, hwif
->io_ports
.device_addr
);
86 EXPORT_SYMBOL_GPL(ide_dev_select
);
88 void ide_tf_load(ide_drive_t
*drive
, struct ide_taskfile
*tf
, u8 valid
)
90 ide_hwif_t
*hwif
= drive
->hwif
;
91 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
92 void (*tf_outb
)(u8 addr
, unsigned long port
);
93 u8 mmio
= (hwif
->host_flags
& IDE_HFLAG_MMIO
) ? 1 : 0;
96 tf_outb
= ide_mm_outb
;
100 if (valid
& IDE_VALID_FEATURE
)
101 tf_outb(tf
->feature
, io_ports
->feature_addr
);
102 if (valid
& IDE_VALID_NSECT
)
103 tf_outb(tf
->nsect
, io_ports
->nsect_addr
);
104 if (valid
& IDE_VALID_LBAL
)
105 tf_outb(tf
->lbal
, io_ports
->lbal_addr
);
106 if (valid
& IDE_VALID_LBAM
)
107 tf_outb(tf
->lbam
, io_ports
->lbam_addr
);
108 if (valid
& IDE_VALID_LBAH
)
109 tf_outb(tf
->lbah
, io_ports
->lbah_addr
);
110 if (valid
& IDE_VALID_DEVICE
)
111 tf_outb(tf
->device
, io_ports
->device_addr
);
113 EXPORT_SYMBOL_GPL(ide_tf_load
);
115 void ide_tf_read(ide_drive_t
*drive
, struct ide_taskfile
*tf
, u8 valid
)
117 ide_hwif_t
*hwif
= drive
->hwif
;
118 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
119 u8 (*tf_inb
)(unsigned long port
);
120 u8 mmio
= (hwif
->host_flags
& IDE_HFLAG_MMIO
) ? 1 : 0;
127 if (valid
& IDE_VALID_ERROR
)
128 tf
->error
= tf_inb(io_ports
->feature_addr
);
129 if (valid
& IDE_VALID_NSECT
)
130 tf
->nsect
= tf_inb(io_ports
->nsect_addr
);
131 if (valid
& IDE_VALID_LBAL
)
132 tf
->lbal
= tf_inb(io_ports
->lbal_addr
);
133 if (valid
& IDE_VALID_LBAM
)
134 tf
->lbam
= tf_inb(io_ports
->lbam_addr
);
135 if (valid
& IDE_VALID_LBAH
)
136 tf
->lbah
= tf_inb(io_ports
->lbah_addr
);
137 if (valid
& IDE_VALID_DEVICE
)
138 tf
->device
= tf_inb(io_ports
->device_addr
);
140 EXPORT_SYMBOL_GPL(ide_tf_read
);
143 * Some localbus EIDE interfaces require a special access sequence
144 * when using 32-bit I/O instructions to transfer data. We call this
145 * the "vlb_sync" sequence, which consists of three successive reads
146 * of the sector count register location, with interrupts disabled
147 * to ensure that the reads all happen together.
149 static void ata_vlb_sync(unsigned long port
)
157 * This is used for most PIO data transfers *from* the IDE interface
159 * These routines will round up any request for an odd number of bytes,
160 * so if an odd len is specified, be sure that there's at least one
161 * extra byte allocated for the buffer.
163 void ide_input_data(ide_drive_t
*drive
, struct ide_cmd
*cmd
, void *buf
,
166 ide_hwif_t
*hwif
= drive
->hwif
;
167 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
168 unsigned long data_addr
= io_ports
->data_addr
;
169 unsigned int words
= (len
+ 1) >> 1;
170 u8 io_32bit
= drive
->io_32bit
;
171 u8 mmio
= (hwif
->host_flags
& IDE_HFLAG_MMIO
) ? 1 : 0;
174 unsigned long uninitialized_var(flags
);
176 if ((io_32bit
& 2) && !mmio
) {
177 local_irq_save(flags
);
178 ata_vlb_sync(io_ports
->nsect_addr
);
183 __ide_mm_insl((void __iomem
*)data_addr
, buf
, words
);
185 insl(data_addr
, buf
, words
);
187 if ((io_32bit
& 2) && !mmio
)
188 local_irq_restore(flags
);
190 if (((len
+ 1) & 3) < 2)
198 __ide_mm_insw((void __iomem
*)data_addr
, buf
, words
);
200 insw(data_addr
, buf
, words
);
202 EXPORT_SYMBOL_GPL(ide_input_data
);
205 * This is used for most PIO data transfers *to* the IDE interface
207 void ide_output_data(ide_drive_t
*drive
, struct ide_cmd
*cmd
, void *buf
,
210 ide_hwif_t
*hwif
= drive
->hwif
;
211 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
212 unsigned long data_addr
= io_ports
->data_addr
;
213 unsigned int words
= (len
+ 1) >> 1;
214 u8 io_32bit
= drive
->io_32bit
;
215 u8 mmio
= (hwif
->host_flags
& IDE_HFLAG_MMIO
) ? 1 : 0;
218 unsigned long uninitialized_var(flags
);
220 if ((io_32bit
& 2) && !mmio
) {
221 local_irq_save(flags
);
222 ata_vlb_sync(io_ports
->nsect_addr
);
227 __ide_mm_outsl((void __iomem
*)data_addr
, buf
, words
);
229 outsl(data_addr
, buf
, words
);
231 if ((io_32bit
& 2) && !mmio
)
232 local_irq_restore(flags
);
234 if (((len
+ 1) & 3) < 2)
242 __ide_mm_outsw((void __iomem
*)data_addr
, buf
, words
);
244 outsw(data_addr
, buf
, words
);
246 EXPORT_SYMBOL_GPL(ide_output_data
);
248 const struct ide_tp_ops default_tp_ops
= {
249 .exec_command
= ide_exec_command
,
250 .read_status
= ide_read_status
,
251 .read_altstatus
= ide_read_altstatus
,
252 .write_devctl
= ide_write_devctl
,
254 .dev_select
= ide_dev_select
,
255 .tf_load
= ide_tf_load
,
256 .tf_read
= ide_tf_read
,
258 .input_data
= ide_input_data
,
259 .output_data
= ide_output_data
,