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,