powerpc/pmac/smp: Fix 32-bit PowerMac cpu_die
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / ide / ide-io-std.c
blob46721c4545180ec4b8835c1c9be6caad6086f36d
2 #include <linux/kernel.h>
3 #include <linux/ide.h>
5 #if defined(CONFIG_ARM) || defined(CONFIG_M68K) || defined(CONFIG_MIPS) || \
6 defined(CONFIG_PARISC) || defined(CONFIG_PPC) || defined(CONFIG_SPARC)
7 #include <asm/ide.h>
8 #else
9 #include <asm-generic/ide_iops.h>
10 #endif
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)
23 outb(val, 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);
44 else
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);
53 else
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);
62 else
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);
71 else
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);
83 else
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;
95 if (mmio)
96 tf_outb = ide_mm_outb;
97 else
98 tf_outb = ide_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;
122 if (mmio)
123 tf_inb = ide_mm_inb;
124 else
125 tf_inb = ide_inb;
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)
151 (void)inb(port);
152 (void)inb(port);
153 (void)inb(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,
164 unsigned int len)
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;
173 if (io_32bit) {
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);
181 words >>= 1;
182 if (mmio)
183 __ide_mm_insl((void __iomem *)data_addr, buf, words);
184 else
185 insl(data_addr, buf, words);
187 if ((io_32bit & 2) && !mmio)
188 local_irq_restore(flags);
190 if (((len + 1) & 3) < 2)
191 return;
193 buf += len & ~3;
194 words = 1;
197 if (mmio)
198 __ide_mm_insw((void __iomem *)data_addr, buf, words);
199 else
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,
208 unsigned int len)
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;
217 if (io_32bit) {
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);
225 words >>= 1;
226 if (mmio)
227 __ide_mm_outsl((void __iomem *)data_addr, buf, words);
228 else
229 outsl(data_addr, buf, words);
231 if ((io_32bit & 2) && !mmio)
232 local_irq_restore(flags);
234 if (((len + 1) & 3) < 2)
235 return;
237 buf += len & ~3;
238 words = 1;
241 if (mmio)
242 __ide_mm_outsw((void __iomem *)data_addr, buf, words);
243 else
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,