2 * ahci.c - AHCI SATA support
4 * Copyright 2004 Red Hat, Inc.
6 * The contents of this file are subject to the Open
7 * Software License version 1.1 that can be found at
8 * http://www.opensource.org/licenses/osl-1.1.txt and is included herein
11 * Alternatively, the contents of this file may be used under the terms
12 * of the GNU General Public License version 2 (the "GPL") as distributed
13 * in the kernel source COPYING file, in which case the provisions of
14 * the GPL are applicable instead of the above. If you wish to allow
15 * the use of your version of this file only under the terms of the
16 * GPL and not to allow others to use your version of this file under
17 * the OSL, indicate your decision by deleting the provisions above and
18 * replace them with the notice and other provisions required by the GPL.
19 * If you do not delete the provisions above, a recipient may use your
20 * version of this file under either the OSL or the GPL.
22 * Version 1.0 of the AHCI specification:
23 * http://www.intel.com/technology/serialata/pdf/rev1_0.pdf
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/pci.h>
30 #include <linux/init.h>
31 #include <linux/blkdev.h>
32 #include <linux/delay.h>
33 #include <linux/interrupt.h>
34 #include <linux/sched.h>
36 #include <scsi/scsi_host.h>
37 #include <linux/libata.h>
40 #define DRV_NAME "ahci"
41 #define DRV_VERSION "1.00"
46 AHCI_MAX_SG = 168, /* hardware max is 64K */
47 AHCI_DMA_BOUNDARY = 0xffffffff,
48 AHCI_USE_CLUSTERING = 0,
49 AHCI_CMD_SLOT_SZ = 32 * 32,
51 AHCI_CMD_TBL_HDR = 0x80,
52 AHCI_CMD_TBL_SZ = AHCI_CMD_TBL_HDR + (AHCI_MAX_SG * 16),
53 AHCI_PORT_PRIV_DMA_SZ = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_SZ +
55 AHCI_IRQ_ON_SG = (1 << 31),
56 AHCI_CMD_ATAPI = (1 << 5),
57 AHCI_CMD_WRITE = (1 << 6),
59 RX_FIS_D2H_REG = 0x40, /* offset of D2H Register FIS data */
63 /* global controller registers */
64 HOST_CAP = 0x00, /* host capabilities */
65 HOST_CTL = 0x04, /* global host control */
66 HOST_IRQ_STAT = 0x08, /* interrupt status */
67 HOST_PORTS_IMPL = 0x0c, /* bitmap of implemented ports */
68 HOST_VERSION = 0x10, /* AHCI spec. version compliancy */
71 HOST_RESET = (1 << 0), /* reset controller; self-clear */
72 HOST_IRQ_EN = (1 << 1), /* global IRQ enable */
73 HOST_AHCI_EN = (1 << 31), /* AHCI enabled */
76 HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */
78 /* registers for each SATA port */
79 PORT_LST_ADDR = 0x00, /* command list DMA addr */
80 PORT_LST_ADDR_HI = 0x04, /* command list DMA addr hi */
81 PORT_FIS_ADDR = 0x08, /* FIS rx buf addr */
82 PORT_FIS_ADDR_HI = 0x0c, /* FIS rx buf addr hi */
83 PORT_IRQ_STAT = 0x10, /* interrupt status */
84 PORT_IRQ_MASK = 0x14, /* interrupt enable/disable mask */
85 PORT_CMD = 0x18, /* port command */
86 PORT_TFDATA = 0x20, /* taskfile data */
87 PORT_SIG = 0x24, /* device TF signature */
88 PORT_CMD_ISSUE = 0x38, /* command issue */
89 PORT_SCR = 0x28, /* SATA phy register block */
90 PORT_SCR_STAT = 0x28, /* SATA phy register: SStatus */
91 PORT_SCR_CTL = 0x2c, /* SATA phy register: SControl */
92 PORT_SCR_ERR = 0x30, /* SATA phy register: SError */
93 PORT_SCR_ACT = 0x34, /* SATA phy register: SActive */
95 /* PORT_IRQ_{STAT,MASK} bits */
96 PORT_IRQ_COLD_PRES = (1 << 31), /* cold presence detect */
97 PORT_IRQ_TF_ERR = (1 << 30), /* task file error */
98 PORT_IRQ_HBUS_ERR = (1 << 29), /* host bus fatal error */
99 PORT_IRQ_HBUS_DATA_ERR = (1 << 28), /* host bus data error */
100 PORT_IRQ_IF_ERR = (1 << 27), /* interface fatal error */
101 PORT_IRQ_IF_NONFATAL = (1 << 26), /* interface non-fatal error */
102 PORT_IRQ_OVERFLOW = (1 << 24), /* xfer exhausted available S/G */
103 PORT_IRQ_BAD_PMP = (1 << 23), /* incorrect port multiplier */
105 PORT_IRQ_PHYRDY = (1 << 22), /* PhyRdy changed */
106 PORT_IRQ_DEV_ILCK = (1 << 7), /* device interlock */
107 PORT_IRQ_CONNECT = (1 << 6), /* port connect change status */
108 PORT_IRQ_SG_DONE = (1 << 5), /* descriptor processed */
109 PORT_IRQ_UNK_FIS = (1 << 4), /* unknown FIS rx'd */
110 PORT_IRQ_SDB_FIS = (1 << 3), /* Set Device Bits FIS rx'd */
111 PORT_IRQ_DMAS_FIS = (1 << 2), /* DMA Setup FIS rx'd */
112 PORT_IRQ_PIOS_FIS = (1 << 1), /* PIO Setup FIS rx'd */
113 PORT_IRQ_D2H_REG_FIS = (1 << 0), /* D2H Register FIS rx'd */
115 PORT_IRQ_FATAL = PORT_IRQ_TF_ERR |
117 PORT_IRQ_HBUS_DATA_ERR |
119 DEF_PORT_IRQ = PORT_IRQ_FATAL | PORT_IRQ_PHYRDY |
120 PORT_IRQ_CONNECT | PORT_IRQ_SG_DONE |
121 PORT_IRQ_UNK_FIS | PORT_IRQ_SDB_FIS |
122 PORT_IRQ_DMAS_FIS | PORT_IRQ_PIOS_FIS |
123 PORT_IRQ_D2H_REG_FIS,
126 PORT_CMD_LIST_ON = (1 << 15), /* cmd list DMA engine running */
127 PORT_CMD_FIS_ON = (1 << 14), /* FIS DMA engine running */
128 PORT_CMD_FIS_RX = (1 << 4), /* Enable FIS receive DMA engine */
129 PORT_CMD_POWER_ON = (1 << 2), /* Power up device */
130 PORT_CMD_SPIN_UP = (1 << 1), /* Spin up device */
131 PORT_CMD_START = (1 << 0), /* Enable port DMA engine */
133 PORT_CMD_ICC_ACTIVE = (0x1 << 28), /* Put i/f in active state */
134 PORT_CMD_ICC_PARTIAL = (0x2 << 28), /* Put i/f in partial state */
135 PORT_CMD_ICC_SLUMBER = (0x6 << 28), /* Put i/f in slumber state */
138 struct ahci_cmd_hdr {
153 struct ahci_host_priv {
155 u32 cap; /* cache of HOST_CAP register */
156 u32 port_map; /* cache of HOST_PORTS_IMPL reg */
159 struct ahci_port_priv {
160 struct ahci_cmd_hdr *cmd_slot;
161 dma_addr_t cmd_slot_dma;
163 dma_addr_t cmd_tbl_dma;
164 struct ahci_sg *cmd_tbl_sg;
166 dma_addr_t rx_fis_dma;
169 static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg);
170 static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
171 static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
172 static int ahci_qc_issue(struct ata_queued_cmd *qc);
173 static irqreturn_t ahci_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
174 static void ahci_phy_reset(struct ata_port *ap);
175 static void ahci_irq_clear(struct ata_port *ap);
176 static void ahci_eng_timeout(struct ata_port *ap);
177 static int ahci_port_start(struct ata_port *ap);
178 static void ahci_port_stop(struct ata_port *ap);
179 static void ahci_host_stop(struct ata_host_set *host_set);
180 static void ahci_qc_prep(struct ata_queued_cmd *qc);
181 static u8 ahci_check_status(struct ata_port *ap);
182 static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
184 static Scsi_Host_Template ahci_sht = {
185 .module = THIS_MODULE,
187 .ioctl = ata_scsi_ioctl,
188 .queuecommand = ata_scsi_queuecmd,
189 .eh_strategy_handler = ata_scsi_error,
190 .can_queue = ATA_DEF_QUEUE,
191 .this_id = ATA_SHT_THIS_ID,
192 .sg_tablesize = AHCI_MAX_SG,
193 .max_sectors = ATA_MAX_SECTORS,
194 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
195 .emulated = ATA_SHT_EMULATED,
196 .use_clustering = AHCI_USE_CLUSTERING,
197 .proc_name = DRV_NAME,
198 .dma_boundary = AHCI_DMA_BOUNDARY,
199 .slave_configure = ata_scsi_slave_config,
200 .bios_param = ata_std_bios_param,
203 static struct ata_port_operations ahci_ops = {
204 .port_disable = ata_port_disable,
206 .check_status = ahci_check_status,
207 .dev_select = ata_noop_dev_select,
209 .phy_reset = ahci_phy_reset,
211 .qc_prep = ahci_qc_prep,
212 .qc_issue = ahci_qc_issue,
214 .eng_timeout = ahci_eng_timeout,
216 .irq_handler = ahci_interrupt,
217 .irq_clear = ahci_irq_clear,
219 .scr_read = ahci_scr_read,
220 .scr_write = ahci_scr_write,
222 .port_start = ahci_port_start,
223 .port_stop = ahci_port_stop,
224 .host_stop = ahci_host_stop,
227 static struct ata_port_info ahci_port_info[] = {
231 .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
232 ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO |
234 .pio_mask = 0x03, /* pio3-4 */
235 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
236 .port_ops = &ahci_ops,
240 static struct pci_device_id ahci_pci_tbl[] = {
241 { PCI_VENDOR_ID_INTEL, 0x2652, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
243 { PCI_VENDOR_ID_INTEL, 0x2653, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
245 { } /* terminate list */
249 static struct pci_driver ahci_pci_driver = {
251 .id_table = ahci_pci_tbl,
252 .probe = ahci_init_one,
253 .remove = ata_pci_remove_one,
257 static inline unsigned long ahci_port_base_ul (unsigned long base, unsigned int port)
259 return base + 0x100 + (port * 0x80);
262 static inline void *ahci_port_base (void *base, unsigned int port)
264 return (void *) ahci_port_base_ul((unsigned long)base, port);
267 static void ahci_host_stop(struct ata_host_set *host_set)
269 struct ahci_host_priv *hpriv = host_set->private_data;
273 static int ahci_port_start(struct ata_port *ap)
275 struct device *dev = ap->host_set->dev;
276 struct ahci_host_priv *hpriv = ap->host_set->private_data;
277 struct ahci_port_priv *pp;
279 void *mem, *mmio = ap->host_set->mmio_base;
280 void *port_mmio = ahci_port_base(mmio, ap->port_no);
283 rc = ata_port_start(ap);
287 pp = kmalloc(sizeof(*pp), GFP_KERNEL);
292 memset(pp, 0, sizeof(*pp));
294 mem = dma_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma, GFP_KERNEL);
299 memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);
302 * First item in chunk of DMA memory: 32-slot command table,
303 * 32 bytes each in size
306 pp->cmd_slot_dma = mem_dma;
308 mem += AHCI_CMD_SLOT_SZ;
309 mem_dma += AHCI_CMD_SLOT_SZ;
312 * Second item: Received-FIS area
315 pp->rx_fis_dma = mem_dma;
317 mem += AHCI_RX_FIS_SZ;
318 mem_dma += AHCI_RX_FIS_SZ;
321 * Third item: data area for storing a single command
322 * and its scatter-gather table
325 pp->cmd_tbl_dma = mem_dma;
327 pp->cmd_tbl_sg = mem + AHCI_CMD_TBL_HDR;
329 ap->private_data = pp;
331 if (hpriv->cap & HOST_CAP_64)
332 writel((pp->cmd_slot_dma >> 16) >> 16, port_mmio + PORT_LST_ADDR_HI);
333 writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
334 readl(port_mmio + PORT_LST_ADDR); /* flush */
336 if (hpriv->cap & HOST_CAP_64)
337 writel((pp->rx_fis_dma >> 16) >> 16, port_mmio + PORT_FIS_ADDR_HI);
338 writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
339 readl(port_mmio + PORT_FIS_ADDR); /* flush */
341 writel(PORT_CMD_ICC_ACTIVE | PORT_CMD_FIS_RX |
342 PORT_CMD_POWER_ON | PORT_CMD_SPIN_UP |
343 PORT_CMD_START, port_mmio + PORT_CMD);
344 readl(port_mmio + PORT_CMD); /* flush */
356 static void ahci_port_stop(struct ata_port *ap)
358 struct device *dev = ap->host_set->dev;
359 struct ahci_port_priv *pp = ap->private_data;
360 void *mmio = ap->host_set->mmio_base;
361 void *port_mmio = ahci_port_base(mmio, ap->port_no);
364 tmp = readl(port_mmio + PORT_CMD);
365 tmp &= ~(PORT_CMD_START | PORT_CMD_FIS_RX);
366 writel(tmp, port_mmio + PORT_CMD);
367 readl(port_mmio + PORT_CMD); /* flush */
369 /* spec says 500 msecs for each PORT_CMD_{START,FIS_RX} bit, so
370 * this is slightly incorrect.
374 ap->private_data = NULL;
375 dma_free_coherent(dev, AHCI_PORT_PRIV_DMA_SZ,
376 pp->cmd_slot, pp->cmd_slot_dma);
381 static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg_in)
386 case SCR_STATUS: sc_reg = 0; break;
387 case SCR_CONTROL: sc_reg = 1; break;
388 case SCR_ERROR: sc_reg = 2; break;
389 case SCR_ACTIVE: sc_reg = 3; break;
394 return readl((void *) ap->ioaddr.scr_addr + (sc_reg * 4));
398 static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg_in,
404 case SCR_STATUS: sc_reg = 0; break;
405 case SCR_CONTROL: sc_reg = 1; break;
406 case SCR_ERROR: sc_reg = 2; break;
407 case SCR_ACTIVE: sc_reg = 3; break;
412 writel(val, (void *) ap->ioaddr.scr_addr + (sc_reg * 4));
415 static void ahci_phy_reset(struct ata_port *ap)
417 void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
418 struct ata_taskfile tf;
419 struct ata_device *dev = &ap->device[0];
422 __sata_phy_reset(ap);
424 if (ap->flags & ATA_FLAG_PORT_DISABLED)
427 tmp = readl(port_mmio + PORT_SIG);
428 tf.lbah = (tmp >> 24) & 0xff;
429 tf.lbam = (tmp >> 16) & 0xff;
430 tf.lbal = (tmp >> 8) & 0xff;
431 tf.nsect = (tmp) & 0xff;
433 dev->class = ata_dev_classify(&tf);
434 if (!ata_dev_present(dev))
435 ata_port_disable(ap);
438 static u8 ahci_check_status(struct ata_port *ap)
440 void *mmio = (void *) ap->ioaddr.cmd_addr;
442 return readl(mmio + PORT_TFDATA) & 0xFF;
445 static void ahci_fill_sg(struct ata_queued_cmd *qc)
447 struct ahci_port_priv *pp = qc->ap->private_data;
453 * Next, the S/G list.
455 for (i = 0; i < qc->n_elem; i++) {
459 addr = sg_dma_address(&qc->sg[i]);
460 sg_len = sg_dma_len(&qc->sg[i]);
462 pp->cmd_tbl_sg[i].addr = cpu_to_le32(addr & 0xffffffff);
463 pp->cmd_tbl_sg[i].addr_hi = cpu_to_le32((addr >> 16) >> 16);
464 pp->cmd_tbl_sg[i].flags_size = cpu_to_le32(sg_len - 1);
468 static void ahci_qc_prep(struct ata_queued_cmd *qc)
470 struct ahci_port_priv *pp = qc->ap->private_data;
472 const u32 cmd_fis_len = 5; /* five dwords */
475 * Fill in command slot information (currently only one slot,
476 * slot 0, is currently since we don't do queueing)
479 opts = (qc->n_elem << 16) | cmd_fis_len;
480 if (qc->tf.flags & ATA_TFLAG_WRITE)
481 opts |= AHCI_CMD_WRITE;
483 switch (qc->tf.protocol) {
485 case ATA_PROT_ATAPI_NODATA:
486 case ATA_PROT_ATAPI_DMA:
487 opts |= AHCI_CMD_ATAPI;
495 pp->cmd_slot[0].opts = cpu_to_le32(opts);
496 pp->cmd_slot[0].status = 0;
497 pp->cmd_slot[0].tbl_addr = cpu_to_le32(pp->cmd_tbl_dma & 0xffffffff);
498 pp->cmd_slot[0].tbl_addr_hi = cpu_to_le32((pp->cmd_tbl_dma >> 16) >> 16);
501 * Fill in command table information. First, the header,
502 * a SATA Register - Host to Device command FIS.
504 ata_tf_to_fis(&qc->tf, pp->cmd_tbl, 0);
506 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
512 static inline void ahci_dma_complete (struct ata_port *ap,
513 struct ata_queued_cmd *qc,
516 /* get drive status; clear intr; complete txn */
517 ata_qc_complete(ata_qc_from_tag(ap, ap->active_tag),
518 have_err ? ATA_ERR : 0);
521 static void ahci_intr_error(struct ata_port *ap, u32 irq_stat)
523 void *mmio = ap->host_set->mmio_base;
524 void *port_mmio = ahci_port_base(mmio, ap->port_no);
529 tmp = readl(port_mmio + PORT_CMD);
530 tmp &= PORT_CMD_START | PORT_CMD_FIS_RX;
531 writel(tmp, port_mmio + PORT_CMD);
533 /* wait for engine to stop. TODO: this could be
534 * as long as 500 msec
538 tmp = readl(port_mmio + PORT_CMD);
539 if ((tmp & PORT_CMD_LIST_ON) == 0)
544 /* clear SATA phy error, if any */
545 tmp = readl(port_mmio + PORT_SCR_ERR);
546 writel(tmp, port_mmio + PORT_SCR_ERR);
548 /* if DRQ/BSY is set, device needs to be reset.
549 * if so, issue COMRESET
551 tmp = readl(port_mmio + PORT_TFDATA);
552 if (tmp & (ATA_BUSY | ATA_DRQ)) {
553 writel(0x301, port_mmio + PORT_SCR_CTL);
554 readl(port_mmio + PORT_SCR_CTL); /* flush */
556 writel(0x300, port_mmio + PORT_SCR_CTL);
557 readl(port_mmio + PORT_SCR_CTL); /* flush */
561 tmp = readl(port_mmio + PORT_CMD);
562 tmp |= PORT_CMD_START | PORT_CMD_FIS_RX;
563 writel(tmp, port_mmio + PORT_CMD);
564 readl(port_mmio + PORT_CMD); /* flush */
566 printk(KERN_WARNING "ata%u: error occurred, port reset\n", ap->port_no);
569 static void ahci_eng_timeout(struct ata_port *ap)
571 void *mmio = ap->host_set->mmio_base;
572 void *port_mmio = ahci_port_base(mmio, ap->port_no);
573 struct ata_queued_cmd *qc;
577 ahci_intr_error(ap, readl(port_mmio + PORT_IRQ_STAT));
579 qc = ata_qc_from_tag(ap, ap->active_tag);
581 printk(KERN_ERR "ata%u: BUG: timeout without command\n",
584 /* hack alert! We cannot use the supplied completion
585 * function from inside the ->eh_strategy_handler() thread.
586 * libata is the only user of ->eh_strategy_handler() in
587 * any kernel, so the default scsi_done() assumes it is
588 * not being called from the SCSI EH.
590 qc->scsidone = scsi_finish_command;
591 ata_qc_complete(qc, ATA_ERR);
596 static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc)
598 void *mmio = ap->host_set->mmio_base;
599 void *port_mmio = ahci_port_base(mmio, ap->port_no);
600 u32 status, serr, ci;
602 serr = readl(port_mmio + PORT_SCR_ERR);
603 writel(serr, port_mmio + PORT_SCR_ERR);
605 status = readl(port_mmio + PORT_IRQ_STAT);
606 writel(status, port_mmio + PORT_IRQ_STAT);
608 ci = readl(port_mmio + PORT_CMD_ISSUE);
609 if (likely((ci & 0x1) == 0)) {
611 ata_qc_complete(qc, 0);
616 if (status & PORT_IRQ_FATAL) {
617 ahci_intr_error(ap, status);
619 ata_qc_complete(qc, ATA_ERR);
625 static void ahci_irq_clear(struct ata_port *ap)
630 static irqreturn_t ahci_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
632 struct ata_host_set *host_set = dev_instance;
633 struct ahci_host_priv *hpriv;
634 unsigned int i, handled = 0;
636 u32 irq_stat, irq_ack = 0;
640 hpriv = host_set->private_data;
641 mmio = host_set->mmio_base;
643 /* sigh. 0xffffffff is a valid return from h/w */
644 irq_stat = readl(mmio + HOST_IRQ_STAT);
645 irq_stat &= hpriv->port_map;
649 spin_lock(&host_set->lock);
651 for (i = 0; i < host_set->n_ports; i++) {
655 VPRINTK("port %u\n", i);
656 ap = host_set->ports[i];
657 tmp = irq_stat & (1 << i);
659 struct ata_queued_cmd *qc;
660 qc = ata_qc_from_tag(ap, ap->active_tag);
661 if (ahci_host_intr(ap, qc))
667 writel(irq_ack, mmio + HOST_IRQ_STAT);
671 spin_unlock(&host_set->lock);
675 return IRQ_RETVAL(handled);
678 static int ahci_qc_issue(struct ata_queued_cmd *qc)
680 struct ata_port *ap = qc->ap;
681 void *port_mmio = (void *) ap->ioaddr.cmd_addr;
683 writel(1, port_mmio + PORT_SCR_ACT);
684 readl(port_mmio + PORT_SCR_ACT); /* flush */
686 writel(1, port_mmio + PORT_CMD_ISSUE);
687 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
692 static void ahci_setup_port(struct ata_ioports *port, unsigned long base,
693 unsigned int port_idx)
695 VPRINTK("ENTER, base==0x%lx, port_idx %u\n", base, port_idx);
696 base = ahci_port_base_ul(base, port_idx);
697 VPRINTK("base now==0x%lx\n", base);
699 port->cmd_addr = base;
700 port->scr_addr = base + PORT_SCR;
705 static int ahci_host_init(struct ata_probe_ent *probe_ent)
707 struct ahci_host_priv *hpriv = probe_ent->private_data;
708 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
709 void __iomem *mmio = probe_ent->mmio_base;
712 unsigned int i, j, using_dac;
714 void __iomem *port_mmio;
716 cap_save = readl(mmio + HOST_CAP);
717 cap_save &= ( (1<<28) | (1<<17) );
718 cap_save |= (1 << 27);
720 /* global controller reset */
721 tmp = readl(mmio + HOST_CTL);
722 if ((tmp & HOST_RESET) == 0) {
723 writel(tmp | HOST_RESET, mmio + HOST_CTL);
724 readl(mmio + HOST_CTL); /* flush */
727 /* reset must complete within 1 second, or
728 * the hardware should be considered fried.
732 tmp = readl(mmio + HOST_CTL);
733 if (tmp & HOST_RESET) {
734 printk(KERN_ERR DRV_NAME "(%s): controller reset failed (0x%x)\n",
735 pci_name(pdev), tmp);
739 writel(HOST_AHCI_EN, mmio + HOST_CTL);
740 (void) readl(mmio + HOST_CTL); /* flush */
741 writel(cap_save, mmio + HOST_CAP);
742 writel(0xf, mmio + HOST_PORTS_IMPL);
743 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
745 pci_read_config_word(pdev, 0x92, &tmp16);
747 pci_write_config_word(pdev, 0x92, tmp16);
749 hpriv->cap = readl(mmio + HOST_CAP);
750 hpriv->port_map = readl(mmio + HOST_PORTS_IMPL);
751 probe_ent->n_ports = (hpriv->cap & 0x1f) + 1;
753 VPRINTK("cap 0x%x port_map 0x%x n_ports %d\n",
754 hpriv->cap, hpriv->port_map, probe_ent->n_ports);
756 using_dac = hpriv->cap & HOST_CAP_64;
758 !pci_set_dma_mask(pdev, 0xffffffffffffffffULL)) {
759 rc = pci_set_consistent_dma_mask(pdev, 0xffffffffffffffffULL);
761 rc = pci_set_consistent_dma_mask(pdev, 0xffffffffULL);
763 printk(KERN_ERR DRV_NAME "(%s): 64-bit DMA enable failed\n",
769 hpriv->flags |= HOST_CAP_64;
771 rc = pci_set_dma_mask(pdev, 0xffffffffULL);
773 printk(KERN_ERR DRV_NAME "(%s): 32-bit DMA enable failed\n",
777 rc = pci_set_consistent_dma_mask(pdev, 0xffffffffULL);
779 printk(KERN_ERR DRV_NAME "(%s): 32-bit consistent DMA enable failed\n",
785 for (i = 0; i < probe_ent->n_ports; i++) {
786 #if 0 /* BIOSen initialize this incorrectly */
787 if (!(hpriv->port_map & (1 << i)))
791 port_mmio = ahci_port_base(mmio, i);
792 VPRINTK("mmio %p port_mmio %p\n", mmio, port_mmio);
794 ahci_setup_port(&probe_ent->port[i],
795 (unsigned long) mmio, i);
797 /* make sure port is not active */
798 tmp = readl(port_mmio + PORT_CMD);
799 VPRINTK("PORT_CMD 0x%x\n", tmp);
800 if (tmp & (PORT_CMD_LIST_ON | PORT_CMD_FIS_ON |
801 PORT_CMD_FIS_RX | PORT_CMD_START)) {
802 tmp &= ~(PORT_CMD_LIST_ON | PORT_CMD_FIS_ON |
803 PORT_CMD_FIS_RX | PORT_CMD_START);
804 writel(tmp, port_mmio + PORT_CMD);
805 readl(port_mmio + PORT_CMD); /* flush */
807 /* spec says 500 msecs for each bit, so
808 * this is slightly incorrect.
813 writel(PORT_CMD_SPIN_UP, port_mmio + PORT_CMD);
818 tmp = readl(port_mmio + PORT_SCR_STAT);
819 if ((tmp & 0xf) == 0x3)
824 tmp = readl(port_mmio + PORT_SCR_ERR);
825 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
826 writel(tmp, port_mmio + PORT_SCR_ERR);
828 /* ack any pending irq events for this port */
829 tmp = readl(port_mmio + PORT_IRQ_STAT);
830 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
832 writel(tmp, port_mmio + PORT_IRQ_STAT);
834 writel(1 << i, mmio + HOST_IRQ_STAT);
836 /* set irq mask (enables interrupts) */
837 writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);
840 tmp = readl(mmio + HOST_CTL);
841 VPRINTK("HOST_CTL 0x%x\n", tmp);
842 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
843 tmp = readl(mmio + HOST_CTL);
844 VPRINTK("HOST_CTL 0x%x\n", tmp);
846 pci_set_master(pdev);
851 /* move to PCI layer, integrate w/ MSI stuff */
852 static void pci_enable_intx(struct pci_dev *pdev)
856 pci_read_config_word(pdev, PCI_COMMAND, &pci_command);
857 if (pci_command & PCI_COMMAND_INTX_DISABLE) {
858 pci_command &= ~PCI_COMMAND_INTX_DISABLE;
859 pci_write_config_word(pdev, PCI_COMMAND, pci_command);
863 static void ahci_print_info(struct ata_probe_ent *probe_ent)
865 struct ahci_host_priv *hpriv = probe_ent->private_data;
866 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
867 void *mmio = probe_ent->mmio_base;
868 u32 vers, cap, impl, speed;
873 vers = readl(mmio + HOST_VERSION);
875 impl = hpriv->port_map;
877 speed = (cap >> 20) & 0xf;
885 pci_read_config_word(pdev, 0x0a, &cc);
888 else if (cc == 0x0106)
890 else if (cc == 0x0104)
895 printk(KERN_INFO DRV_NAME "(%s) AHCI %02x%02x.%02x%02x "
896 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
905 ((cap >> 8) & 0x1f) + 1,
911 printk(KERN_INFO DRV_NAME "(%s) flags: "
917 cap & (1 << 31) ? "64bit " : "",
918 cap & (1 << 30) ? "ncq " : "",
919 cap & (1 << 28) ? "ilck " : "",
920 cap & (1 << 27) ? "stag " : "",
921 cap & (1 << 26) ? "pm " : "",
922 cap & (1 << 25) ? "led " : "",
924 cap & (1 << 24) ? "clo " : "",
925 cap & (1 << 19) ? "nz " : "",
926 cap & (1 << 18) ? "only " : "",
927 cap & (1 << 17) ? "pmp " : "",
928 cap & (1 << 15) ? "pio " : "",
929 cap & (1 << 14) ? "slum " : "",
930 cap & (1 << 13) ? "part " : ""
934 static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
936 static int printed_version;
937 struct ata_probe_ent *probe_ent = NULL;
938 struct ahci_host_priv *hpriv;
941 unsigned int board_idx = (unsigned int) ent->driver_data;
946 if (!printed_version++)
947 printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");
949 rc = pci_enable_device(pdev);
953 rc = pci_request_regions(pdev, DRV_NAME);
957 pci_enable_intx(pdev);
959 probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
960 if (probe_ent == NULL) {
962 goto err_out_regions;
965 memset(probe_ent, 0, sizeof(*probe_ent));
966 probe_ent->dev = pci_dev_to_dev(pdev);
967 INIT_LIST_HEAD(&probe_ent->node);
969 mmio_base = ioremap(pci_resource_start(pdev, AHCI_PCI_BAR),
970 pci_resource_len(pdev, AHCI_PCI_BAR));
971 if (mmio_base == NULL) {
973 goto err_out_free_ent;
975 base = (unsigned long) mmio_base;
977 hpriv = kmalloc(sizeof(*hpriv), GFP_KERNEL);
980 goto err_out_iounmap;
982 memset(hpriv, 0, sizeof(*hpriv));
984 probe_ent->sht = ahci_port_info[board_idx].sht;
985 probe_ent->host_flags = ahci_port_info[board_idx].host_flags;
986 probe_ent->pio_mask = ahci_port_info[board_idx].pio_mask;
987 probe_ent->udma_mask = ahci_port_info[board_idx].udma_mask;
988 probe_ent->port_ops = ahci_port_info[board_idx].port_ops;
990 probe_ent->irq = pdev->irq;
991 probe_ent->irq_flags = SA_SHIRQ;
992 probe_ent->mmio_base = mmio_base;
993 probe_ent->private_data = hpriv;
995 /* initialize adapter */
996 rc = ahci_host_init(probe_ent);
1000 ahci_print_info(probe_ent);
1002 /* FIXME: check ata_device_add return value */
1003 ata_device_add(probe_ent);
1015 pci_release_regions(pdev);
1017 pci_disable_device(pdev);
1022 static int __init ahci_init(void)
1024 return pci_module_init(&ahci_pci_driver);
1028 static void __exit ahci_exit(void)
1030 pci_unregister_driver(&ahci_pci_driver);
1034 MODULE_AUTHOR("Jeff Garzik");
1035 MODULE_DESCRIPTION("AHCI SATA low-level driver");
1036 MODULE_LICENSE("GPL");
1037 MODULE_DEVICE_TABLE(pci, ahci_pci_tbl);
1039 module_init(ahci_init);
1040 module_exit(ahci_exit);