3 * Provides ACPI support for PATA/SATA.
5 * Copyright (C) 2006 Intel Corp.
6 * Copyright (C) 2006 Randy Dunlap
10 #include <linux/delay.h>
11 #include <linux/device.h>
12 #include <linux/errno.h>
13 #include <linux/kernel.h>
14 #include <linux/acpi.h>
15 #include <linux/libata.h>
16 #include <linux/pci.h>
19 #include <acpi/acpi_bus.h>
20 #include <acpi/acnames.h>
21 #include <acpi/acnamesp.h>
22 #include <acpi/acparser.h>
23 #include <acpi/acexcep.h>
24 #include <acpi/acmacros.h>
25 #include <acpi/actypes.h>
27 #define NO_PORT_MULT 0xffff
28 #define SATA_ADR(root,pmp) (((root) << 16) | (pmp))
30 #define REGS_PER_GTF 7
32 u8 tf[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */
36 * Helper - belongs in the PCI layer somewhere eventually
38 static int is_pci_dev(struct device *dev)
40 return (dev->bus == &pci_bus_type);
43 static void ata_acpi_associate_sata_port(struct ata_port *ap)
45 acpi_integer adr = SATA_ADR(ap->port_no, NO_PORT_MULT);
47 ap->device->acpi_handle = acpi_get_child(ap->host->acpi_handle, adr);
50 static void ata_acpi_associate_ide_port(struct ata_port *ap)
54 ap->acpi_handle = acpi_get_child(ap->host->acpi_handle, ap->port_no);
59 if (ap->flags & ATA_FLAG_SLAVE_POSS)
62 for (i = 0; i < max_devices; i++) {
63 struct ata_device *dev = &ap->device[i];
65 dev->acpi_handle = acpi_get_child(ap->acpi_handle, i);
70 * ata_acpi_associate - associate ATA host with ACPI objects
71 * @host: target ATA host
73 * Look up ACPI objects associated with @host and initialize
74 * acpi_handle fields of @host, its ports and devices accordingly.
80 * 0 on success, -errno on failure.
82 void ata_acpi_associate(struct ata_host *host)
86 if (!is_pci_dev(host->dev) || libata_noacpi)
89 host->acpi_handle = DEVICE_ACPI_HANDLE(host->dev);
90 if (!host->acpi_handle)
93 for (i = 0; i < host->n_ports; i++) {
94 struct ata_port *ap = host->ports[i];
96 if (host->ports[0]->flags & ATA_FLAG_ACPI_SATA)
97 ata_acpi_associate_sata_port(ap);
99 ata_acpi_associate_ide_port(ap);
104 * ata_dev_get_GTF - get the drive bootup default taskfile settings
105 * @dev: target ATA device
106 * @gtf: output parameter for buffer containing _GTF taskfile arrays
107 * @ptr_to_free: pointer which should be freed
109 * This applies to both PATA and SATA drives.
111 * The _GTF method has no input parameters.
112 * It returns a variable number of register set values (registers
113 * hex 1F1..1F7, taskfiles).
114 * The <variable number> is not known in advance, so have ACPI-CA
115 * allocate the buffer as needed and return it, then free it later.
121 * Number of taskfiles on success, 0 if _GTF doesn't exist or doesn't
122 * contain valid data. -errno on other errors.
124 static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf,
127 struct ata_port *ap = dev->ap;
129 struct acpi_buffer output;
130 union acpi_object *out_obj;
133 /* set up output buffer */
134 output.length = ACPI_ALLOCATE_BUFFER;
135 output.pointer = NULL; /* ACPI-CA sets this; save/free it later */
137 if (!dev->acpi_handle)
140 if (ata_msg_probe(ap))
141 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER: port#: %d\n",
142 __FUNCTION__, ap->port_no);
144 if (!ata_dev_enabled(dev) || (ap->flags & ATA_FLAG_DISABLED)) {
145 if (ata_msg_probe(ap))
146 ata_dev_printk(dev, KERN_DEBUG, "%s: ERR: "
147 "ata_dev_present: %d, PORT_DISABLED: %lu\n",
148 __FUNCTION__, ata_dev_enabled(dev),
149 ap->flags & ATA_FLAG_DISABLED);
153 /* _GTF has no input parameters */
154 status = acpi_evaluate_object(dev->acpi_handle, "_GTF", NULL, &output);
156 if (ACPI_FAILURE(status)) {
157 if (status != AE_NOT_FOUND) {
158 ata_dev_printk(dev, KERN_WARNING,
159 "_GTF evaluation failed (AE 0x%x)\n",
166 if (!output.length || !output.pointer) {
167 if (ata_msg_probe(ap))
168 ata_dev_printk(dev, KERN_DEBUG, "%s: Run _GTF: "
169 "length or ptr is NULL (0x%llx, 0x%p)\n",
171 (unsigned long long)output.length,
176 out_obj = output.pointer;
177 if (out_obj->type != ACPI_TYPE_BUFFER) {
178 if (ata_msg_probe(ap))
179 ata_dev_printk(dev, KERN_DEBUG, "%s: Run _GTF: "
180 "error: expected object type of "
181 " ACPI_TYPE_BUFFER, got 0x%x\n",
182 __FUNCTION__, out_obj->type);
187 if (out_obj->buffer.length % REGS_PER_GTF) {
189 ata_dev_printk(dev, KERN_ERR,
190 "%s: unexpected GTF length (%d) or addr (0x%p)\n",
191 __FUNCTION__, out_obj->buffer.length,
192 out_obj->buffer.pointer);
197 *ptr_to_free = out_obj;
198 *gtf = (void *)out_obj->buffer.pointer;
199 rc = out_obj->buffer.length / REGS_PER_GTF;
201 if (ata_msg_probe(ap))
202 ata_dev_printk(dev, KERN_DEBUG, "%s: returning "
203 "gtf=%p, gtf_count=%d, ptr_to_free=%p\n",
204 __FUNCTION__, *gtf, rc, *ptr_to_free);
208 kfree(output.pointer);
213 * taskfile_load_raw - send taskfile registers to host controller
214 * @dev: target ATA device
215 * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7)
217 * Outputs ATA taskfile to standard ATA host controller using MMIO
218 * or PIO as indicated by the ATA_FLAG_MMIO flag.
219 * Writes the control, feature, nsect, lbal, lbam, and lbah registers.
220 * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect,
221 * hob_lbal, hob_lbam, and hob_lbah.
223 * This function waits for idle (!BUSY and !DRQ) after writing
224 * registers. If the control register has a new value, this
225 * function also waits for idle after writing control and before
226 * writing the remaining registers.
232 * 0 on success, -errno on failure.
234 static int taskfile_load_raw(struct ata_device *dev,
235 const struct ata_acpi_gtf *gtf)
237 struct ata_port *ap = dev->ap;
238 struct ata_taskfile tf, rtf;
239 unsigned int err_mask;
241 if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0)
242 && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0)
243 && (gtf->tf[6] == 0))
246 ata_tf_init(dev, &tf);
248 /* convert gtf to tf */
249 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; /* TBD */
250 tf.protocol = ATA_PROT_NODATA;
251 tf.feature = gtf->tf[0]; /* 0x1f1 */
252 tf.nsect = gtf->tf[1]; /* 0x1f2 */
253 tf.lbal = gtf->tf[2]; /* 0x1f3 */
254 tf.lbam = gtf->tf[3]; /* 0x1f4 */
255 tf.lbah = gtf->tf[4]; /* 0x1f5 */
256 tf.device = gtf->tf[5]; /* 0x1f6 */
257 tf.command = gtf->tf[6]; /* 0x1f7 */
259 if (ata_msg_probe(ap))
260 ata_dev_printk(dev, KERN_DEBUG, "executing ACPI cmd "
261 "%02x/%02x:%02x:%02x:%02x:%02x:%02x\n",
262 tf.command, tf.feature, tf.nsect,
263 tf.lbal, tf.lbam, tf.lbah, tf.device);
266 err_mask = ata_exec_internal(dev, &rtf, NULL, DMA_NONE, NULL, 0);
268 ata_dev_printk(dev, KERN_ERR,
269 "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x failed "
270 "(Emask=0x%x Stat=0x%02x Err=0x%02x)\n",
271 tf.command, tf.feature, tf.nsect, tf.lbal, tf.lbam,
272 tf.lbah, tf.device, err_mask, rtf.command, rtf.feature);
280 * ata_dev_set_taskfiles - write the drive taskfile settings from _GTF
281 * @dev: target ATA device
282 * @gtf: pointer to array of _GTF taskfiles to execute
283 * @gtf_count: number of taskfiles
285 * This applies to both PATA and SATA drives.
287 * Execute taskfiles in @gtf.
293 * 0 on success, -errno on failure.
295 static int ata_dev_set_taskfiles(struct ata_device *dev,
296 struct ata_acpi_gtf *gtf, int gtf_count)
298 struct ata_port *ap = dev->ap;
301 if (ata_msg_probe(ap))
302 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER: port#: %d\n",
303 __FUNCTION__, ap->port_no);
305 if (!(ap->flags & ATA_FLAG_ACPI_SATA))
308 if (!ata_dev_enabled(dev) || (ap->flags & ATA_FLAG_DISABLED))
311 /* send all TaskFile registers (0x1f1-0x1f7) *in*that*order* */
312 for (ix = 0; ix < gtf_count; ix++)
313 taskfile_load_raw(dev, gtf++);
319 * ata_acpi_exec_tfs - get then write drive taskfile settings
320 * @ap: the ata_port for the drive
322 * This applies to both PATA and SATA drives.
324 int ata_acpi_exec_tfs(struct ata_port *ap)
329 * TBD - implement PATA support. For now,
330 * we should not run GTF on PATA devices since some
331 * PATA require execution of GTM/STM before GTF.
333 if (!(ap->flags & ATA_FLAG_ACPI_SATA))
336 for (ix = 0; ix < ATA_MAX_DEVICES; ix++) {
337 struct ata_device *dev = &ap->device[ix];
338 struct ata_acpi_gtf *gtf = NULL;
340 void *ptr_to_free = NULL;
342 if (!ata_dev_enabled(dev))
345 ret = ata_dev_get_GTF(dev, >f, &ptr_to_free);
349 if (ata_msg_probe(ap))
350 ata_port_printk(ap, KERN_DEBUG,
351 "%s: get_GTF error (%d)\n",
357 ret = ata_dev_set_taskfiles(dev, gtf, gtf_count);
360 if (ata_msg_probe(ap))
361 ata_port_printk(ap, KERN_DEBUG,
362 "%s: set_taskfiles error (%d)\n",
372 * ata_acpi_push_id - send Identify data to drive
373 * @dev: target ATA device
375 * _SDD ACPI object: for SATA mode only
376 * Must be after Identify (Packet) Device -- uses its data
377 * ATM this function never returns a failure. It is an optional
378 * method and if it fails for whatever reason, we should still
381 int ata_acpi_push_id(struct ata_device *dev)
383 struct ata_port *ap = dev->ap;
386 struct acpi_object_list input;
387 union acpi_object in_params[1];
389 if (!dev->acpi_handle)
392 if (ata_msg_probe(ap))
393 ata_dev_printk(dev, KERN_DEBUG, "%s: ix = %d, port#: %d\n",
394 __FUNCTION__, dev->devno, ap->port_no);
396 /* Don't continue if not a SATA device. */
397 if (!(ap->flags & ATA_FLAG_ACPI_SATA)) {
398 if (ata_msg_probe(ap))
399 ata_dev_printk(dev, KERN_DEBUG,
400 "%s: Not a SATA device\n", __FUNCTION__);
404 /* Give the drive Identify data to the drive via the _SDD method */
405 /* _SDD: set up input parameters */
407 input.pointer = in_params;
408 in_params[0].type = ACPI_TYPE_BUFFER;
409 in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS;
410 in_params[0].buffer.pointer = (u8 *)dev->id;
411 /* Output buffer: _SDD has no output */
413 /* It's OK for _SDD to be missing too. */
414 swap_buf_le16(dev->id, ATA_ID_WORDS);
415 status = acpi_evaluate_object(dev->acpi_handle, "_SDD", &input, NULL);
416 swap_buf_le16(dev->id, ATA_ID_WORDS);
418 err = ACPI_FAILURE(status) ? -EIO : 0;
420 if (ata_msg_probe(ap))
421 ata_dev_printk(dev, KERN_DEBUG,
422 "%s _SDD error: status = 0x%x\n",
423 __FUNCTION__, status);
426 /* always return success */