2 * sata_sil24.c - Driver for Silicon Image 3124/3132 SATA-2 controllers
4 * Copyright 2005 Tejun Heo
6 * Based on preview driver from Silicon Image.
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2, or (at your option) any
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
20 #include <linux/kernel.h>
21 #include <linux/module.h>
22 #include <linux/pci.h>
23 #include <linux/blkdev.h>
24 #include <linux/delay.h>
25 #include <linux/interrupt.h>
26 #include <linux/dma-mapping.h>
27 #include <linux/device.h>
28 #include <scsi/scsi_host.h>
29 #include <scsi/scsi_cmnd.h>
30 #include <linux/libata.h>
33 #define DRV_NAME "sata_sil24"
34 #define DRV_VERSION "0.23"
37 * Port request block (PRB) 32 bytes
47 * Scatter gather entry (SGE) 16 bytes
58 struct sil24_port_multiplier {
65 * Global controller registers (128 bytes @ BAR0)
68 HOST_SLOT_STAT = 0x00, /* 32 bit slot stat * 4 */
72 HOST_BIST_CTRL = 0x50,
73 HOST_BIST_PTRN = 0x54,
74 HOST_BIST_STAT = 0x58,
75 HOST_MEM_BIST_STAT = 0x5c,
76 HOST_FLASH_CMD = 0x70,
78 HOST_FLASH_DATA = 0x74,
79 HOST_TRANSITION_DETECT = 0x75,
80 HOST_GPIO_CTRL = 0x76,
81 HOST_I2C_ADDR = 0x78, /* 32 bit */
83 HOST_I2C_XFER_CNT = 0x7e,
86 /* HOST_SLOT_STAT bits */
87 HOST_SSTAT_ATTN = (1 << 31),
91 * (8192 bytes @ +0x0000, +0x2000, +0x4000 and +0x6000 @ BAR2)
93 PORT_REGS_SIZE = 0x2000,
94 PORT_PRB = 0x0000, /* (32 bytes PRB + 16 bytes SGEs * 6) * 31 (3968 bytes) */
96 PORT_PM = 0x0f80, /* 8 bytes PM * 16 (128 bytes) */
98 PORT_CTRL_STAT = 0x1000, /* write: ctrl-set, read: stat */
99 PORT_CTRL_CLR = 0x1004, /* write: ctrl-clear */
100 PORT_IRQ_STAT = 0x1008, /* high: status, low: interrupt */
101 PORT_IRQ_ENABLE_SET = 0x1010, /* write: enable-set */
102 PORT_IRQ_ENABLE_CLR = 0x1014, /* write: enable-clear */
103 PORT_ACTIVATE_UPPER_ADDR= 0x101c,
104 PORT_EXEC_FIFO = 0x1020, /* command execution fifo */
105 PORT_CMD_ERR = 0x1024, /* command error number */
106 PORT_FIS_CFG = 0x1028,
107 PORT_FIFO_THRES = 0x102c,
109 PORT_DECODE_ERR_CNT = 0x1040,
110 PORT_DECODE_ERR_THRESH = 0x1042,
111 PORT_CRC_ERR_CNT = 0x1044,
112 PORT_CRC_ERR_THRESH = 0x1046,
113 PORT_HSHK_ERR_CNT = 0x1048,
114 PORT_HSHK_ERR_THRESH = 0x104a,
116 PORT_PHY_CFG = 0x1050,
117 PORT_SLOT_STAT = 0x1800,
118 PORT_CMD_ACTIVATE = 0x1c00, /* 64 bit cmd activate * 31 (248 bytes) */
119 PORT_EXEC_DIAG = 0x1e00, /* 32bit exec diag * 16 (64 bytes, 0-10 used on 3124) */
120 PORT_PSD_DIAG = 0x1e40, /* 32bit psd diag * 16 (64 bytes, 0-8 used on 3124) */
121 PORT_SCONTROL = 0x1f00,
122 PORT_SSTATUS = 0x1f04,
123 PORT_SERROR = 0x1f08,
124 PORT_SACTIVE = 0x1f0c,
126 /* PORT_CTRL_STAT bits */
127 PORT_CS_PORT_RST = (1 << 0), /* port reset */
128 PORT_CS_DEV_RST = (1 << 1), /* device reset */
129 PORT_CS_INIT = (1 << 2), /* port initialize */
130 PORT_CS_IRQ_WOC = (1 << 3), /* interrupt write one to clear */
131 PORT_CS_CDB16 = (1 << 5), /* 0=12b cdb, 1=16b cdb */
132 PORT_CS_RESUME = (1 << 6), /* port resume */
133 PORT_CS_32BIT_ACTV = (1 << 10), /* 32-bit activation */
134 PORT_CS_PM_EN = (1 << 13), /* port multiplier enable */
135 PORT_CS_RDY = (1 << 31), /* port ready to accept commands */
137 /* PORT_IRQ_STAT/ENABLE_SET/CLR */
138 /* bits[11:0] are masked */
139 PORT_IRQ_COMPLETE = (1 << 0), /* command(s) completed */
140 PORT_IRQ_ERROR = (1 << 1), /* command execution error */
141 PORT_IRQ_PORTRDY_CHG = (1 << 2), /* port ready change */
142 PORT_IRQ_PWR_CHG = (1 << 3), /* power management change */
143 PORT_IRQ_PHYRDY_CHG = (1 << 4), /* PHY ready change */
144 PORT_IRQ_COMWAKE = (1 << 5), /* COMWAKE received */
145 PORT_IRQ_UNK_FIS = (1 << 6), /* Unknown FIS received */
146 PORT_IRQ_SDB_FIS = (1 << 11), /* SDB FIS received */
148 /* bits[27:16] are unmasked (raw) */
149 PORT_IRQ_RAW_SHIFT = 16,
150 PORT_IRQ_MASKED_MASK = 0x7ff,
151 PORT_IRQ_RAW_MASK = (0x7ff << PORT_IRQ_RAW_SHIFT),
153 /* ENABLE_SET/CLR specific, intr steering - 2 bit field */
154 PORT_IRQ_STEER_SHIFT = 30,
155 PORT_IRQ_STEER_MASK = (3 << PORT_IRQ_STEER_SHIFT),
157 /* PORT_CMD_ERR constants */
158 PORT_CERR_DEV = 1, /* Error bit in D2H Register FIS */
159 PORT_CERR_SDB = 2, /* Error bit in SDB FIS */
160 PORT_CERR_DATA = 3, /* Error in data FIS not detected by dev */
161 PORT_CERR_SEND = 4, /* Initial cmd FIS transmission failure */
162 PORT_CERR_INCONSISTENT = 5, /* Protocol mismatch */
163 PORT_CERR_DIRECTION = 6, /* Data direction mismatch */
164 PORT_CERR_UNDERRUN = 7, /* Ran out of SGEs while writing */
165 PORT_CERR_OVERRUN = 8, /* Ran out of SGEs while reading */
166 PORT_CERR_PKT_PROT = 11, /* DIR invalid in 1st PIO setup of ATAPI */
167 PORT_CERR_SGT_BOUNDARY = 16, /* PLD ecode 00 - SGT not on qword boundary */
168 PORT_CERR_SGT_TGTABRT = 17, /* PLD ecode 01 - target abort */
169 PORT_CERR_SGT_MSTABRT = 18, /* PLD ecode 10 - master abort */
170 PORT_CERR_SGT_PCIPERR = 19, /* PLD ecode 11 - PCI parity err while fetching SGT */
171 PORT_CERR_CMD_BOUNDARY = 24, /* ctrl[15:13] 001 - PRB not on qword boundary */
172 PORT_CERR_CMD_TGTABRT = 25, /* ctrl[15:13] 010 - target abort */
173 PORT_CERR_CMD_MSTABRT = 26, /* ctrl[15:13] 100 - master abort */
174 PORT_CERR_CMD_PCIPERR = 27, /* ctrl[15:13] 110 - PCI parity err while fetching PRB */
175 PORT_CERR_XFR_UNDEF = 32, /* PSD ecode 00 - undefined */
176 PORT_CERR_XFR_TGTABRT = 33, /* PSD ecode 01 - target abort */
177 PORT_CERR_XFR_MSGABRT = 34, /* PSD ecode 10 - master abort */
178 PORT_CERR_XFR_PCIPERR = 35, /* PSD ecode 11 - PCI prity err during transfer */
179 PORT_CERR_SENDSERVICE = 36, /* FIS received while sending service */
181 /* bits of PRB control field */
182 PRB_CTRL_PROTOCOL = (1 << 0), /* override def. ATA protocol */
183 PRB_CTRL_PACKET_READ = (1 << 4), /* PACKET cmd read */
184 PRB_CTRL_PACKET_WRITE = (1 << 5), /* PACKET cmd write */
185 PRB_CTRL_NIEN = (1 << 6), /* Mask completion irq */
186 PRB_CTRL_SRST = (1 << 7), /* Soft reset request (ign BSY?) */
188 /* PRB protocol field */
189 PRB_PROT_PACKET = (1 << 0),
190 PRB_PROT_TCQ = (1 << 1),
191 PRB_PROT_NCQ = (1 << 2),
192 PRB_PROT_READ = (1 << 3),
193 PRB_PROT_WRITE = (1 << 4),
194 PRB_PROT_TRANSPARENT = (1 << 5),
199 SGE_TRM = (1 << 31), /* Last SGE in chain */
200 SGE_LNK = (1 << 30), /* linked list
201 Points to SGT, not SGE */
202 SGE_DRD = (1 << 29), /* discard data read (/dev/null)
203 data address ignored */
210 IRQ_STAT_4PORTS = 0xf,
213 struct sil24_ata_block {
214 struct sil24_prb prb;
215 struct sil24_sge sge[LIBATA_MAX_PRD];
218 struct sil24_atapi_block {
219 struct sil24_prb prb;
221 struct sil24_sge sge[LIBATA_MAX_PRD - 1];
224 union sil24_cmd_block {
225 struct sil24_ata_block ata;
226 struct sil24_atapi_block atapi;
232 * The preview driver always returned 0 for status. We emulate it
233 * here from the previous interrupt.
235 struct sil24_port_priv {
236 union sil24_cmd_block *cmd_block; /* 32 cmd blocks */
237 dma_addr_t cmd_block_dma; /* DMA base addr for them */
238 struct ata_taskfile tf; /* Cached taskfile registers */
241 /* ap->host_set->private_data */
242 struct sil24_host_priv {
243 void __iomem *host_base; /* global controller control (128 bytes @BAR0) */
244 void __iomem *port_base; /* port registers (4 * 8192 bytes @BAR2) */
247 static void sil24_dev_config(struct ata_port *ap, struct ata_device *dev);
248 static u8 sil24_check_status(struct ata_port *ap);
249 static u32 sil24_scr_read(struct ata_port *ap, unsigned sc_reg);
250 static void sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val);
251 static void sil24_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
252 static int sil24_probe_reset(struct ata_port *ap, unsigned int *classes);
253 static void sil24_qc_prep(struct ata_queued_cmd *qc);
254 static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc);
255 static void sil24_irq_clear(struct ata_port *ap);
256 static void sil24_eng_timeout(struct ata_port *ap);
257 static irqreturn_t sil24_interrupt(int irq, void *dev_instance, struct pt_regs *regs);
258 static int sil24_port_start(struct ata_port *ap);
259 static void sil24_port_stop(struct ata_port *ap);
260 static void sil24_host_stop(struct ata_host_set *host_set);
261 static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
263 static const struct pci_device_id sil24_pci_tbl[] = {
264 { 0x1095, 0x3124, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3124 },
265 { 0x8086, 0x3124, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3124 },
266 { 0x1095, 0x3132, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3132 },
267 { 0x1095, 0x3131, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3131 },
268 { 0x1095, 0x3531, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3131 },
269 { } /* terminate list */
272 static struct pci_driver sil24_pci_driver = {
274 .id_table = sil24_pci_tbl,
275 .probe = sil24_init_one,
276 .remove = ata_pci_remove_one, /* safe? */
279 static struct scsi_host_template sil24_sht = {
280 .module = THIS_MODULE,
282 .ioctl = ata_scsi_ioctl,
283 .queuecommand = ata_scsi_queuecmd,
284 .eh_timed_out = ata_scsi_timed_out,
285 .eh_strategy_handler = ata_scsi_error,
286 .can_queue = ATA_DEF_QUEUE,
287 .this_id = ATA_SHT_THIS_ID,
288 .sg_tablesize = LIBATA_MAX_PRD,
289 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
290 .emulated = ATA_SHT_EMULATED,
291 .use_clustering = ATA_SHT_USE_CLUSTERING,
292 .proc_name = DRV_NAME,
293 .dma_boundary = ATA_DMA_BOUNDARY,
294 .slave_configure = ata_scsi_slave_config,
295 .bios_param = ata_std_bios_param,
298 static const struct ata_port_operations sil24_ops = {
299 .port_disable = ata_port_disable,
301 .dev_config = sil24_dev_config,
303 .check_status = sil24_check_status,
304 .check_altstatus = sil24_check_status,
305 .dev_select = ata_noop_dev_select,
307 .tf_read = sil24_tf_read,
309 .probe_reset = sil24_probe_reset,
311 .qc_prep = sil24_qc_prep,
312 .qc_issue = sil24_qc_issue,
314 .eng_timeout = sil24_eng_timeout,
316 .irq_handler = sil24_interrupt,
317 .irq_clear = sil24_irq_clear,
319 .scr_read = sil24_scr_read,
320 .scr_write = sil24_scr_write,
322 .port_start = sil24_port_start,
323 .port_stop = sil24_port_stop,
324 .host_stop = sil24_host_stop,
328 * Use bits 30-31 of host_flags to encode available port numbers.
329 * Current maxium is 4.
331 #define SIL24_NPORTS2FLAG(nports) ((((unsigned)(nports) - 1) & 0x3) << 30)
332 #define SIL24_FLAG2NPORTS(flag) ((((flag) >> 30) & 0x3) + 1)
334 static struct ata_port_info sil24_port_info[] = {
338 .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
339 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
340 SIL24_NPORTS2FLAG(4),
341 .pio_mask = 0x1f, /* pio0-4 */
342 .mwdma_mask = 0x07, /* mwdma0-2 */
343 .udma_mask = 0x3f, /* udma0-5 */
344 .port_ops = &sil24_ops,
349 .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
350 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
351 SIL24_NPORTS2FLAG(2),
352 .pio_mask = 0x1f, /* pio0-4 */
353 .mwdma_mask = 0x07, /* mwdma0-2 */
354 .udma_mask = 0x3f, /* udma0-5 */
355 .port_ops = &sil24_ops,
357 /* sil_3131/sil_3531 */
360 .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
361 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
362 SIL24_NPORTS2FLAG(1),
363 .pio_mask = 0x1f, /* pio0-4 */
364 .mwdma_mask = 0x07, /* mwdma0-2 */
365 .udma_mask = 0x3f, /* udma0-5 */
366 .port_ops = &sil24_ops,
370 static void sil24_dev_config(struct ata_port *ap, struct ata_device *dev)
372 void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr;
374 if (dev->cdb_len == 16)
375 writel(PORT_CS_CDB16, port + PORT_CTRL_STAT);
377 writel(PORT_CS_CDB16, port + PORT_CTRL_CLR);
380 static inline void sil24_update_tf(struct ata_port *ap)
382 struct sil24_port_priv *pp = ap->private_data;
383 void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr;
384 struct sil24_prb __iomem *prb = port;
387 memcpy_fromio(fis, prb->fis, 6 * 4);
388 ata_tf_from_fis(fis, &pp->tf);
391 static u8 sil24_check_status(struct ata_port *ap)
393 struct sil24_port_priv *pp = ap->private_data;
394 return pp->tf.command;
397 static int sil24_scr_map[] = {
404 static u32 sil24_scr_read(struct ata_port *ap, unsigned sc_reg)
406 void __iomem *scr_addr = (void __iomem *)ap->ioaddr.scr_addr;
407 if (sc_reg < ARRAY_SIZE(sil24_scr_map)) {
409 addr = scr_addr + sil24_scr_map[sc_reg] * 4;
410 return readl(scr_addr + sil24_scr_map[sc_reg] * 4);
415 static void sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val)
417 void __iomem *scr_addr = (void __iomem *)ap->ioaddr.scr_addr;
418 if (sc_reg < ARRAY_SIZE(sil24_scr_map)) {
420 addr = scr_addr + sil24_scr_map[sc_reg] * 4;
421 writel(val, scr_addr + sil24_scr_map[sc_reg] * 4);
425 static void sil24_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
427 struct sil24_port_priv *pp = ap->private_data;
431 static int sil24_softreset(struct ata_port *ap, int verbose,
434 void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr;
435 struct sil24_port_priv *pp = ap->private_data;
436 struct sil24_prb *prb = &pp->cmd_block[0].ata.prb;
437 dma_addr_t paddr = pp->cmd_block_dma;
438 u32 irq_enable, irq_stat;
443 /* temporarily turn off IRQs during SRST */
444 irq_enable = readl(port + PORT_IRQ_ENABLE_SET);
445 writel(irq_enable, port + PORT_IRQ_ENABLE_CLR);
448 * XXX: Not sure whether the following sleep is needed or not.
449 * The original driver had it. So....
453 prb->ctrl = PRB_CTRL_SRST;
454 prb->fis[1] = 0; /* no PM yet */
456 writel((u32)paddr, port + PORT_CMD_ACTIVATE);
458 for (cnt = 0; cnt < 100; cnt++) {
459 irq_stat = readl(port + PORT_IRQ_STAT);
460 writel(irq_stat, port + PORT_IRQ_STAT); /* clear irq */
462 irq_stat >>= PORT_IRQ_RAW_SHIFT;
463 if (irq_stat & (PORT_IRQ_COMPLETE | PORT_IRQ_ERROR))
470 writel(irq_enable, port + PORT_IRQ_ENABLE_SET);
472 if (sata_dev_present(ap)) {
473 if (!(irq_stat & PORT_IRQ_COMPLETE)) {
474 DPRINTK("EXIT, srst failed\n");
479 *class = ata_dev_classify(&pp->tf);
481 if (*class == ATA_DEV_UNKNOWN)
482 *class = ATA_DEV_NONE;
484 DPRINTK("EXIT, class=%u\n", *class);
488 static int sil24_hardreset(struct ata_port *ap, int verbose,
491 unsigned int dummy_class;
493 /* sil24 doesn't report device signature after hard reset */
494 return sata_std_hardreset(ap, verbose, &dummy_class);
497 static int sil24_probe_reset(struct ata_port *ap, unsigned int *classes)
499 return ata_drive_probe_reset(ap, ata_std_probeinit,
500 sil24_softreset, sil24_hardreset,
501 ata_std_postreset, classes);
504 static inline void sil24_fill_sg(struct ata_queued_cmd *qc,
505 struct sil24_sge *sge)
507 struct scatterlist *sg;
508 unsigned int idx = 0;
510 ata_for_each_sg(sg, qc) {
511 sge->addr = cpu_to_le64(sg_dma_address(sg));
512 sge->cnt = cpu_to_le32(sg_dma_len(sg));
513 if (ata_sg_is_last(sg, qc))
514 sge->flags = cpu_to_le32(SGE_TRM);
523 static void sil24_qc_prep(struct ata_queued_cmd *qc)
525 struct ata_port *ap = qc->ap;
526 struct sil24_port_priv *pp = ap->private_data;
527 union sil24_cmd_block *cb = pp->cmd_block + qc->tag;
528 struct sil24_prb *prb;
529 struct sil24_sge *sge;
531 switch (qc->tf.protocol) {
534 case ATA_PROT_NODATA:
541 case ATA_PROT_ATAPI_DMA:
542 case ATA_PROT_ATAPI_NODATA:
543 prb = &cb->atapi.prb;
545 memset(cb->atapi.cdb, 0, 32);
546 memcpy(cb->atapi.cdb, qc->cdb, qc->dev->cdb_len);
548 if (qc->tf.protocol != ATA_PROT_ATAPI_NODATA) {
549 if (qc->tf.flags & ATA_TFLAG_WRITE)
550 prb->ctrl = PRB_CTRL_PACKET_WRITE;
552 prb->ctrl = PRB_CTRL_PACKET_READ;
559 prb = NULL; /* shut up, gcc */
564 ata_tf_to_fis(&qc->tf, prb->fis, 0);
566 if (qc->flags & ATA_QCFLAG_DMAMAP)
567 sil24_fill_sg(qc, sge);
570 static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc)
572 struct ata_port *ap = qc->ap;
573 void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr;
574 struct sil24_port_priv *pp = ap->private_data;
575 dma_addr_t paddr = pp->cmd_block_dma + qc->tag * sizeof(*pp->cmd_block);
577 writel((u32)paddr, port + PORT_CMD_ACTIVATE);
581 static void sil24_irq_clear(struct ata_port *ap)
586 static int __sil24_restart_controller(void __iomem *port)
591 writel(PORT_CS_INIT, port + PORT_CTRL_STAT);
594 for (cnt = 0; cnt < 10000; cnt++) {
595 tmp = readl(port + PORT_CTRL_STAT);
596 if (tmp & PORT_CS_RDY)
604 static void sil24_restart_controller(struct ata_port *ap)
606 if (__sil24_restart_controller((void __iomem *)ap->ioaddr.cmd_addr))
607 printk(KERN_ERR DRV_NAME
608 " ata%u: failed to restart controller\n", ap->id);
611 static int __sil24_reset_controller(void __iomem *port)
616 /* Reset controller state. Is this correct? */
617 writel(PORT_CS_DEV_RST, port + PORT_CTRL_STAT);
618 readl(port + PORT_CTRL_STAT); /* sync */
621 for (cnt = 0; cnt < 1000; cnt++) {
623 tmp = readl(port + PORT_CTRL_STAT);
624 if (!(tmp & PORT_CS_DEV_RST))
628 if (tmp & PORT_CS_DEV_RST)
631 if (tmp & PORT_CS_RDY)
634 return __sil24_restart_controller(port);
637 static void sil24_reset_controller(struct ata_port *ap)
639 printk(KERN_NOTICE DRV_NAME
640 " ata%u: resetting controller...\n", ap->id);
641 if (__sil24_reset_controller((void __iomem *)ap->ioaddr.cmd_addr))
642 printk(KERN_ERR DRV_NAME
643 " ata%u: failed to reset controller\n", ap->id);
646 static void sil24_eng_timeout(struct ata_port *ap)
648 struct ata_queued_cmd *qc;
650 qc = ata_qc_from_tag(ap, ap->active_tag);
652 printk(KERN_ERR "ata%u: command timeout\n", ap->id);
653 qc->err_mask |= AC_ERR_TIMEOUT;
654 ata_eh_qc_complete(qc);
656 sil24_reset_controller(ap);
659 static void sil24_error_intr(struct ata_port *ap, u32 slot_stat)
661 struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag);
662 struct sil24_port_priv *pp = ap->private_data;
663 void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr;
664 u32 irq_stat, cmd_err, sstatus, serror;
665 unsigned int err_mask;
667 irq_stat = readl(port + PORT_IRQ_STAT);
668 writel(irq_stat, port + PORT_IRQ_STAT); /* clear irq */
670 if (!(irq_stat & PORT_IRQ_ERROR)) {
671 /* ignore non-completion, non-error irqs for now */
672 printk(KERN_WARNING DRV_NAME
673 "ata%u: non-error exception irq (irq_stat %x)\n",
678 cmd_err = readl(port + PORT_CMD_ERR);
679 sstatus = readl(port + PORT_SSTATUS);
680 serror = readl(port + PORT_SERROR);
682 writel(serror, port + PORT_SERROR);
685 * Don't log ATAPI device errors. They're supposed to happen
686 * and any serious errors will be logged using sense data by
689 if (ap->device[0].class != ATA_DEV_ATAPI || cmd_err > PORT_CERR_SDB)
690 printk("ata%u: error interrupt on port%d\n"
691 " stat=0x%x irq=0x%x cmd_err=%d sstatus=0x%x serror=0x%x\n",
692 ap->id, ap->port_no, slot_stat, irq_stat, cmd_err, sstatus, serror);
694 if (cmd_err == PORT_CERR_DEV || cmd_err == PORT_CERR_SDB) {
696 * Device is reporting error, tf registers are valid.
699 err_mask = ac_err_mask(pp->tf.command);
700 sil24_restart_controller(ap);
703 * Other errors. libata currently doesn't have any
704 * mechanism to report these errors. Just turn on
707 err_mask = AC_ERR_OTHER;
708 sil24_reset_controller(ap);
712 qc->err_mask |= err_mask;
717 static inline void sil24_host_intr(struct ata_port *ap)
719 struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag);
720 void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr;
723 slot_stat = readl(port + PORT_SLOT_STAT);
724 if (!(slot_stat & HOST_SSTAT_ATTN)) {
725 struct sil24_port_priv *pp = ap->private_data;
727 * !HOST_SSAT_ATTN guarantees successful completion,
728 * so reading back tf registers is unnecessary for
729 * most commands. TODO: read tf registers for
730 * commands which require these values on successful
731 * completion (EXECUTE DEVICE DIAGNOSTIC, CHECK POWER,
732 * DEVICE RESET and READ PORT MULTIPLIER (any more?).
737 qc->err_mask |= ac_err_mask(pp->tf.command);
741 sil24_error_intr(ap, slot_stat);
744 static irqreturn_t sil24_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
746 struct ata_host_set *host_set = dev_instance;
747 struct sil24_host_priv *hpriv = host_set->private_data;
748 unsigned handled = 0;
752 status = readl(hpriv->host_base + HOST_IRQ_STAT);
754 if (status == 0xffffffff) {
755 printk(KERN_ERR DRV_NAME ": IRQ status == 0xffffffff, "
756 "PCI fault or device removal?\n");
760 if (!(status & IRQ_STAT_4PORTS))
763 spin_lock(&host_set->lock);
765 for (i = 0; i < host_set->n_ports; i++)
766 if (status & (1 << i)) {
767 struct ata_port *ap = host_set->ports[i];
768 if (ap && !(ap->flags & ATA_FLAG_PORT_DISABLED)) {
769 sil24_host_intr(host_set->ports[i]);
772 printk(KERN_ERR DRV_NAME
773 ": interrupt from disabled port %d\n", i);
776 spin_unlock(&host_set->lock);
778 return IRQ_RETVAL(handled);
781 static inline void sil24_cblk_free(struct sil24_port_priv *pp, struct device *dev)
783 const size_t cb_size = sizeof(*pp->cmd_block);
785 dma_free_coherent(dev, cb_size, pp->cmd_block, pp->cmd_block_dma);
788 static int sil24_port_start(struct ata_port *ap)
790 struct device *dev = ap->host_set->dev;
791 struct sil24_port_priv *pp;
792 union sil24_cmd_block *cb;
793 size_t cb_size = sizeof(*cb);
797 pp = kzalloc(sizeof(*pp), GFP_KERNEL);
801 pp->tf.command = ATA_DRDY;
803 cb = dma_alloc_coherent(dev, cb_size, &cb_dma, GFP_KERNEL);
806 memset(cb, 0, cb_size);
808 rc = ata_pad_alloc(ap, dev);
813 pp->cmd_block_dma = cb_dma;
815 ap->private_data = pp;
820 sil24_cblk_free(pp, dev);
827 static void sil24_port_stop(struct ata_port *ap)
829 struct device *dev = ap->host_set->dev;
830 struct sil24_port_priv *pp = ap->private_data;
832 sil24_cblk_free(pp, dev);
833 ata_pad_free(ap, dev);
837 static void sil24_host_stop(struct ata_host_set *host_set)
839 struct sil24_host_priv *hpriv = host_set->private_data;
841 iounmap(hpriv->host_base);
842 iounmap(hpriv->port_base);
846 static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
848 static int printed_version = 0;
849 unsigned int board_id = (unsigned int)ent->driver_data;
850 struct ata_port_info *pinfo = &sil24_port_info[board_id];
851 struct ata_probe_ent *probe_ent = NULL;
852 struct sil24_host_priv *hpriv = NULL;
853 void __iomem *host_base = NULL;
854 void __iomem *port_base = NULL;
857 if (!printed_version++)
858 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
860 rc = pci_enable_device(pdev);
864 rc = pci_request_regions(pdev, DRV_NAME);
869 /* ioremap mmio registers */
870 host_base = ioremap(pci_resource_start(pdev, 0),
871 pci_resource_len(pdev, 0));
874 port_base = ioremap(pci_resource_start(pdev, 2),
875 pci_resource_len(pdev, 2));
879 /* allocate & init probe_ent and hpriv */
880 probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
884 hpriv = kmalloc(sizeof(*hpriv), GFP_KERNEL);
888 memset(probe_ent, 0, sizeof(*probe_ent));
889 probe_ent->dev = pci_dev_to_dev(pdev);
890 INIT_LIST_HEAD(&probe_ent->node);
892 probe_ent->sht = pinfo->sht;
893 probe_ent->host_flags = pinfo->host_flags;
894 probe_ent->pio_mask = pinfo->pio_mask;
895 probe_ent->udma_mask = pinfo->udma_mask;
896 probe_ent->port_ops = pinfo->port_ops;
897 probe_ent->n_ports = SIL24_FLAG2NPORTS(pinfo->host_flags);
899 probe_ent->irq = pdev->irq;
900 probe_ent->irq_flags = SA_SHIRQ;
901 probe_ent->mmio_base = port_base;
902 probe_ent->private_data = hpriv;
904 memset(hpriv, 0, sizeof(*hpriv));
905 hpriv->host_base = host_base;
906 hpriv->port_base = port_base;
909 * Configure the device
912 * FIXME: This device is certainly 64-bit capable. We just
913 * don't know how to use it. After fixing 32bit activation in
914 * this function, enable 64bit masks here.
916 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
918 dev_printk(KERN_ERR, &pdev->dev,
919 "32-bit DMA enable failed\n");
922 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
924 dev_printk(KERN_ERR, &pdev->dev,
925 "32-bit consistent DMA enable failed\n");
930 writel(0, host_base + HOST_FLASH_CMD);
932 /* Mask interrupts during initialization */
933 writel(0, host_base + HOST_CTRL);
935 for (i = 0; i < probe_ent->n_ports; i++) {
936 void __iomem *port = port_base + i * PORT_REGS_SIZE;
937 unsigned long portu = (unsigned long)port;
941 probe_ent->port[i].cmd_addr = portu + PORT_PRB;
942 probe_ent->port[i].scr_addr = portu + PORT_SCONTROL;
944 ata_std_ports(&probe_ent->port[i]);
946 /* Initial PHY setting */
947 writel(0x20c, port + PORT_PHY_CFG);
950 tmp = readl(port + PORT_CTRL_STAT);
951 if (tmp & PORT_CS_PORT_RST) {
952 writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR);
953 readl(port + PORT_CTRL_STAT); /* sync */
954 for (cnt = 0; cnt < 10; cnt++) {
956 tmp = readl(port + PORT_CTRL_STAT);
957 if (!(tmp & PORT_CS_PORT_RST))
960 if (tmp & PORT_CS_PORT_RST)
961 dev_printk(KERN_ERR, &pdev->dev,
962 "failed to clear port RST\n");
965 /* Zero error counters. */
966 writel(0x8000, port + PORT_DECODE_ERR_THRESH);
967 writel(0x8000, port + PORT_CRC_ERR_THRESH);
968 writel(0x8000, port + PORT_HSHK_ERR_THRESH);
969 writel(0x0000, port + PORT_DECODE_ERR_CNT);
970 writel(0x0000, port + PORT_CRC_ERR_CNT);
971 writel(0x0000, port + PORT_HSHK_ERR_CNT);
973 /* FIXME: 32bit activation? */
974 writel(0, port + PORT_ACTIVATE_UPPER_ADDR);
975 writel(PORT_CS_32BIT_ACTV, port + PORT_CTRL_STAT);
977 /* Configure interrupts */
978 writel(0xffff, port + PORT_IRQ_ENABLE_CLR);
979 writel(PORT_IRQ_COMPLETE | PORT_IRQ_ERROR | PORT_IRQ_SDB_FIS,
980 port + PORT_IRQ_ENABLE_SET);
982 /* Clear interrupts */
983 writel(0x0fff0fff, port + PORT_IRQ_STAT);
984 writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_CLR);
986 /* Clear port multiplier enable and resume bits */
987 writel(PORT_CS_PM_EN | PORT_CS_RESUME, port + PORT_CTRL_CLR);
990 if (__sil24_reset_controller(port))
991 dev_printk(KERN_ERR, &pdev->dev,
992 "failed to reset controller\n");
995 /* Turn on interrupts */
996 writel(IRQ_STAT_4PORTS, host_base + HOST_CTRL);
998 pci_set_master(pdev);
1000 /* FIXME: check ata_device_add return value */
1001 ata_device_add(probe_ent);
1013 pci_release_regions(pdev);
1015 pci_disable_device(pdev);
1019 static int __init sil24_init(void)
1021 return pci_module_init(&sil24_pci_driver);
1024 static void __exit sil24_exit(void)
1026 pci_unregister_driver(&sil24_pci_driver);
1029 MODULE_AUTHOR("Tejun Heo");
1030 MODULE_DESCRIPTION("Silicon Image 3124/3132 SATA low-level driver");
1031 MODULE_LICENSE("GPL");
1032 MODULE_DEVICE_TABLE(pci, sil24_pci_tbl);
1034 module_init(sil24_init);
1035 module_exit(sil24_exit);