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->tf;
93 void (*tf_outb)(u8 addr, unsigned long port);
94 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
95 u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
98 tf_outb = ide_mm_outb;
102 if (cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
105 if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
106 tf_outb(tf->hob_feature, io_ports->feature_addr);
107 if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
108 tf_outb(tf->hob_nsect, io_ports->nsect_addr);
109 if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
110 tf_outb(tf->hob_lbal, io_ports->lbal_addr);
111 if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
112 tf_outb(tf->hob_lbam, io_ports->lbam_addr);
113 if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
114 tf_outb(tf->hob_lbah, io_ports->lbah_addr);
116 if (cmd->tf_flags & IDE_TFLAG_OUT_FEATURE)
117 tf_outb(tf->feature, io_ports->feature_addr);
118 if (cmd->tf_flags & IDE_TFLAG_OUT_NSECT)
119 tf_outb(tf->nsect, io_ports->nsect_addr);
120 if (cmd->tf_flags & IDE_TFLAG_OUT_LBAL)
121 tf_outb(tf->lbal, io_ports->lbal_addr);
122 if (cmd->tf_flags & IDE_TFLAG_OUT_LBAM)
123 tf_outb(tf->lbam, io_ports->lbam_addr);
124 if (cmd->tf_flags & IDE_TFLAG_OUT_LBAH)
125 tf_outb(tf->lbah, io_ports->lbah_addr);
127 if (cmd->tf_flags & IDE_TFLAG_OUT_DEVICE)
128 tf_outb((tf->device & HIHI) | drive->select,
129 io_ports->device_addr);
131 EXPORT_SYMBOL_GPL(ide_tf_load);
133 void ide_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
135 ide_hwif_t *hwif = drive->hwif;
136 struct ide_io_ports *io_ports = &hwif->io_ports;
137 struct ide_taskfile *tf = &cmd->tf;
138 void (*tf_outb)(u8 addr, unsigned long port);
139 u8 (*tf_inb)(unsigned long port);
140 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
143 tf_outb = ide_mm_outb;
150 /* be sure we're looking at the low order bits */
151 tf_outb(ATA_DEVCTL_OBS, io_ports->ctl_addr);
153 if (cmd->tf_flags & IDE_TFLAG_IN_ERROR)
154 tf->error = tf_inb(io_ports->feature_addr);
155 if (cmd->tf_flags & IDE_TFLAG_IN_NSECT)
156 tf->nsect = tf_inb(io_ports->nsect_addr);
157 if (cmd->tf_flags & IDE_TFLAG_IN_LBAL)
158 tf->lbal = tf_inb(io_ports->lbal_addr);
159 if (cmd->tf_flags & IDE_TFLAG_IN_LBAM)
160 tf->lbam = tf_inb(io_ports->lbam_addr);
161 if (cmd->tf_flags & IDE_TFLAG_IN_LBAH)
162 tf->lbah = tf_inb(io_ports->lbah_addr);
163 if (cmd->tf_flags & IDE_TFLAG_IN_DEVICE)
164 tf->device = tf_inb(io_ports->device_addr);
166 if (cmd->tf_flags & IDE_TFLAG_LBA48) {
167 tf_outb(ATA_HOB | ATA_DEVCTL_OBS, io_ports->ctl_addr);
169 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_ERROR)
170 tf->hob_error = tf_inb(io_ports->feature_addr);
171 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
172 tf->hob_nsect = tf_inb(io_ports->nsect_addr);
173 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
174 tf->hob_lbal = tf_inb(io_ports->lbal_addr);
175 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
176 tf->hob_lbam = tf_inb(io_ports->lbam_addr);
177 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
178 tf->hob_lbah = tf_inb(io_ports->lbah_addr);
181 EXPORT_SYMBOL_GPL(ide_tf_read);
184 * Some localbus EIDE interfaces require a special access sequence
185 * when using 32-bit I/O instructions to transfer data. We call this
186 * the "vlb_sync" sequence, which consists of three successive reads
187 * of the sector count register location, with interrupts disabled
188 * to ensure that the reads all happen together.
190 static void ata_vlb_sync(unsigned long port)
198 * This is used for most PIO data transfers *from* the IDE interface
200 * These routines will round up any request for an odd number of bytes,
201 * so if an odd len is specified, be sure that there's at least one
202 * extra byte allocated for the buffer.
204 void ide_input_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf,
207 ide_hwif_t *hwif = drive->hwif;
208 struct ide_io_ports *io_ports = &hwif->io_ports;
209 unsigned long data_addr = io_ports->data_addr;
210 unsigned int words = (len + 1) >> 1;
211 u8 io_32bit = drive->io_32bit;
212 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
215 unsigned long uninitialized_var(flags);
217 if ((io_32bit & 2) && !mmio) {
218 local_irq_save(flags);
219 ata_vlb_sync(io_ports->nsect_addr);
224 __ide_mm_insl((void __iomem *)data_addr, buf, words);
226 insl(data_addr, buf, words);
228 if ((io_32bit & 2) && !mmio)
229 local_irq_restore(flags);
231 if (((len + 1) & 3) < 2)
239 __ide_mm_insw((void __iomem *)data_addr, buf, words);
241 insw(data_addr, buf, words);
243 EXPORT_SYMBOL_GPL(ide_input_data);
246 * This is used for most PIO data transfers *to* the IDE interface
248 void ide_output_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf,
251 ide_hwif_t *hwif = drive->hwif;
252 struct ide_io_ports *io_ports = &hwif->io_ports;
253 unsigned long data_addr = io_ports->data_addr;
254 unsigned int words = (len + 1) >> 1;
255 u8 io_32bit = drive->io_32bit;
256 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
259 unsigned long uninitialized_var(flags);
261 if ((io_32bit & 2) && !mmio) {
262 local_irq_save(flags);
263 ata_vlb_sync(io_ports->nsect_addr);
268 __ide_mm_outsl((void __iomem *)data_addr, buf, words);
270 outsl(data_addr, buf, words);
272 if ((io_32bit & 2) && !mmio)
273 local_irq_restore(flags);
275 if (((len + 1) & 3) < 2)
283 __ide_mm_outsw((void __iomem *)data_addr, buf, words);
285 outsw(data_addr, buf, words);
287 EXPORT_SYMBOL_GPL(ide_output_data);
289 const struct ide_tp_ops default_tp_ops = {
290 .exec_command = ide_exec_command,
291 .read_status = ide_read_status,
292 .read_altstatus = ide_read_altstatus,
293 .write_devctl = ide_write_devctl,
295 .dev_select = ide_dev_select,
296 .tf_load = ide_tf_load,
297 .tf_read = ide_tf_read,
299 .input_data = ide_input_data,
300 .output_data = ide_output_data,