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_cmd *cmd)
90 ide_hwif_t *hwif = drive->hwif;
91 struct ide_io_ports *io_ports = &hwif->io_ports;
92 struct ide_taskfile *tf = &cmd->hob;
93 void (*tf_outb)(u8 addr, unsigned long port);
94 u8 valid = cmd->valid.out.hob;
95 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
98 tf_outb = ide_mm_outb;
102 if (valid & IDE_VALID_FEATURE)
103 tf_outb(tf->feature, io_ports->feature_addr);
104 if (valid & IDE_VALID_NSECT)
105 tf_outb(tf->nsect, io_ports->nsect_addr);
106 if (valid & IDE_VALID_LBAL)
107 tf_outb(tf->lbal, io_ports->lbal_addr);
108 if (valid & IDE_VALID_LBAM)
109 tf_outb(tf->lbam, io_ports->lbam_addr);
110 if (valid & IDE_VALID_LBAH)
111 tf_outb(tf->lbah, io_ports->lbah_addr);
114 valid = cmd->valid.out.tf;
116 if (valid & IDE_VALID_FEATURE)
117 tf_outb(tf->feature, io_ports->feature_addr);
118 if (valid & IDE_VALID_NSECT)
119 tf_outb(tf->nsect, io_ports->nsect_addr);
120 if (valid & IDE_VALID_LBAL)
121 tf_outb(tf->lbal, io_ports->lbal_addr);
122 if (valid & IDE_VALID_LBAM)
123 tf_outb(tf->lbam, io_ports->lbam_addr);
124 if (valid & IDE_VALID_LBAH)
125 tf_outb(tf->lbah, io_ports->lbah_addr);
126 if (valid & IDE_VALID_DEVICE)
127 tf_outb(tf->device, io_ports->device_addr);
129 EXPORT_SYMBOL_GPL(ide_tf_load);
131 void ide_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
133 ide_hwif_t *hwif = drive->hwif;
134 struct ide_io_ports *io_ports = &hwif->io_ports;
135 struct ide_taskfile *tf = &cmd->tf;
136 u8 (*tf_inb)(unsigned long port);
137 u8 valid = cmd->valid.in.tf;
138 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
145 /* be sure we're looking at the low order bits */
146 hwif->tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
148 if (valid & IDE_VALID_ERROR)
149 tf->error = tf_inb(io_ports->feature_addr);
150 if (valid & IDE_VALID_NSECT)
151 tf->nsect = tf_inb(io_ports->nsect_addr);
152 if (valid & IDE_VALID_LBAL)
153 tf->lbal = tf_inb(io_ports->lbal_addr);
154 if (valid & IDE_VALID_LBAM)
155 tf->lbam = tf_inb(io_ports->lbam_addr);
156 if (valid & IDE_VALID_LBAH)
157 tf->lbah = tf_inb(io_ports->lbah_addr);
158 if (valid & IDE_VALID_DEVICE)
159 tf->device = tf_inb(io_ports->device_addr);
161 if (cmd->tf_flags & IDE_TFLAG_LBA48) {
162 hwif->tp_ops->write_devctl(hwif, ATA_HOB | ATA_DEVCTL_OBS);
165 valid = cmd->valid.in.hob;
167 if (valid & IDE_VALID_ERROR)
168 tf->error = tf_inb(io_ports->feature_addr);
169 if (valid & IDE_VALID_NSECT)
170 tf->nsect = tf_inb(io_ports->nsect_addr);
171 if (valid & IDE_VALID_LBAL)
172 tf->lbal = tf_inb(io_ports->lbal_addr);
173 if (valid & IDE_VALID_LBAM)
174 tf->lbam = tf_inb(io_ports->lbam_addr);
175 if (valid & IDE_VALID_LBAH)
176 tf->lbah = tf_inb(io_ports->lbah_addr);
179 EXPORT_SYMBOL_GPL(ide_tf_read);
182 * Some localbus EIDE interfaces require a special access sequence
183 * when using 32-bit I/O instructions to transfer data. We call this
184 * the "vlb_sync" sequence, which consists of three successive reads
185 * of the sector count register location, with interrupts disabled
186 * to ensure that the reads all happen together.
188 static void ata_vlb_sync(unsigned long port)
196 * This is used for most PIO data transfers *from* the IDE interface
198 * These routines will round up any request for an odd number of bytes,
199 * so if an odd len is specified, be sure that there's at least one
200 * extra byte allocated for the buffer.
202 void ide_input_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf,
205 ide_hwif_t *hwif = drive->hwif;
206 struct ide_io_ports *io_ports = &hwif->io_ports;
207 unsigned long data_addr = io_ports->data_addr;
208 unsigned int words = (len + 1) >> 1;
209 u8 io_32bit = drive->io_32bit;
210 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
213 unsigned long uninitialized_var(flags);
215 if ((io_32bit & 2) && !mmio) {
216 local_irq_save(flags);
217 ata_vlb_sync(io_ports->nsect_addr);
222 __ide_mm_insl((void __iomem *)data_addr, buf, words);
224 insl(data_addr, buf, words);
226 if ((io_32bit & 2) && !mmio)
227 local_irq_restore(flags);
229 if (((len + 1) & 3) < 2)
237 __ide_mm_insw((void __iomem *)data_addr, buf, words);
239 insw(data_addr, buf, words);
241 EXPORT_SYMBOL_GPL(ide_input_data);
244 * This is used for most PIO data transfers *to* the IDE interface
246 void ide_output_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf,
249 ide_hwif_t *hwif = drive->hwif;
250 struct ide_io_ports *io_ports = &hwif->io_ports;
251 unsigned long data_addr = io_ports->data_addr;
252 unsigned int words = (len + 1) >> 1;
253 u8 io_32bit = drive->io_32bit;
254 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
257 unsigned long uninitialized_var(flags);
259 if ((io_32bit & 2) && !mmio) {
260 local_irq_save(flags);
261 ata_vlb_sync(io_ports->nsect_addr);
266 __ide_mm_outsl((void __iomem *)data_addr, buf, words);
268 outsl(data_addr, buf, words);
270 if ((io_32bit & 2) && !mmio)
271 local_irq_restore(flags);
273 if (((len + 1) & 3) < 2)
281 __ide_mm_outsw((void __iomem *)data_addr, buf, words);
283 outsw(data_addr, buf, words);
285 EXPORT_SYMBOL_GPL(ide_output_data);
287 const struct ide_tp_ops default_tp_ops = {
288 .exec_command = ide_exec_command,
289 .read_status = ide_read_status,
290 .read_altstatus = ide_read_altstatus,
291 .write_devctl = ide_write_devctl,
293 .dev_select = ide_dev_select,
294 .tf_load = ide_tf_load,
295 .tf_read = ide_tf_read,
297 .input_data = ide_input_data,
298 .output_data = ide_output_data,