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 "0.24"
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),
90 HOST_CTRL_M66EN = (1 << 16), /* M66EN PCI bus signal */
91 HOST_CTRL_TRDY = (1 << 17), /* latched PCI TRDY */
92 HOST_CTRL_STOP = (1 << 18), /* latched PCI STOP */
93 HOST_CTRL_DEVSEL = (1 << 19), /* latched PCI DEVSEL */
94 HOST_CTRL_REQ64 = (1 << 20), /* latched PCI REQ64 */
98 * (8192 bytes @ +0x0000, +0x2000, +0x4000 and +0x6000 @ BAR2)
100 PORT_REGS_SIZE = 0x2000,
101 PORT_PRB = 0x0000, /* (32 bytes PRB + 16 bytes SGEs * 6) * 31 (3968 bytes) */
103 PORT_PM = 0x0f80, /* 8 bytes PM * 16 (128 bytes) */
105 PORT_CTRL_STAT = 0x1000, /* write: ctrl-set, read: stat */
106 PORT_CTRL_CLR = 0x1004, /* write: ctrl-clear */
107 PORT_IRQ_STAT = 0x1008, /* high: status, low: interrupt */
108 PORT_IRQ_ENABLE_SET = 0x1010, /* write: enable-set */
109 PORT_IRQ_ENABLE_CLR = 0x1014, /* write: enable-clear */
110 PORT_ACTIVATE_UPPER_ADDR= 0x101c,
111 PORT_EXEC_FIFO = 0x1020, /* command execution fifo */
112 PORT_CMD_ERR = 0x1024, /* command error number */
113 PORT_FIS_CFG = 0x1028,
114 PORT_FIFO_THRES = 0x102c,
116 PORT_DECODE_ERR_CNT = 0x1040,
117 PORT_DECODE_ERR_THRESH = 0x1042,
118 PORT_CRC_ERR_CNT = 0x1044,
119 PORT_CRC_ERR_THRESH = 0x1046,
120 PORT_HSHK_ERR_CNT = 0x1048,
121 PORT_HSHK_ERR_THRESH = 0x104a,
123 PORT_PHY_CFG = 0x1050,
124 PORT_SLOT_STAT = 0x1800,
125 PORT_CMD_ACTIVATE = 0x1c00, /* 64 bit cmd activate * 31 (248 bytes) */
126 PORT_EXEC_DIAG = 0x1e00, /* 32bit exec diag * 16 (64 bytes, 0-10 used on 3124) */
127 PORT_PSD_DIAG = 0x1e40, /* 32bit psd diag * 16 (64 bytes, 0-8 used on 3124) */
128 PORT_SCONTROL = 0x1f00,
129 PORT_SSTATUS = 0x1f04,
130 PORT_SERROR = 0x1f08,
131 PORT_SACTIVE = 0x1f0c,
133 /* PORT_CTRL_STAT bits */
134 PORT_CS_PORT_RST = (1 << 0), /* port reset */
135 PORT_CS_DEV_RST = (1 << 1), /* device reset */
136 PORT_CS_INIT = (1 << 2), /* port initialize */
137 PORT_CS_IRQ_WOC = (1 << 3), /* interrupt write one to clear */
138 PORT_CS_CDB16 = (1 << 5), /* 0=12b cdb, 1=16b cdb */
139 PORT_CS_RESUME = (1 << 6), /* port resume */
140 PORT_CS_32BIT_ACTV = (1 << 10), /* 32-bit activation */
141 PORT_CS_PM_EN = (1 << 13), /* port multiplier enable */
142 PORT_CS_RDY = (1 << 31), /* port ready to accept commands */
144 /* PORT_IRQ_STAT/ENABLE_SET/CLR */
145 /* bits[11:0] are masked */
146 PORT_IRQ_COMPLETE = (1 << 0), /* command(s) completed */
147 PORT_IRQ_ERROR = (1 << 1), /* command execution error */
148 PORT_IRQ_PORTRDY_CHG = (1 << 2), /* port ready change */
149 PORT_IRQ_PWR_CHG = (1 << 3), /* power management change */
150 PORT_IRQ_PHYRDY_CHG = (1 << 4), /* PHY ready change */
151 PORT_IRQ_COMWAKE = (1 << 5), /* COMWAKE received */
152 PORT_IRQ_UNK_FIS = (1 << 6), /* unknown FIS received */
153 PORT_IRQ_DEV_XCHG = (1 << 7), /* device exchanged */
154 PORT_IRQ_8B10B = (1 << 8), /* 8b/10b decode error threshold */
155 PORT_IRQ_CRC = (1 << 9), /* CRC error threshold */
156 PORT_IRQ_HANDSHAKE = (1 << 10), /* handshake error threshold */
157 PORT_IRQ_SDB_NOTIFY = (1 << 11), /* SDB notify received */
159 /* bits[27:16] are unmasked (raw) */
160 PORT_IRQ_RAW_SHIFT = 16,
161 PORT_IRQ_MASKED_MASK = 0x7ff,
162 PORT_IRQ_RAW_MASK = (0x7ff << PORT_IRQ_RAW_SHIFT),
164 /* ENABLE_SET/CLR specific, intr steering - 2 bit field */
165 PORT_IRQ_STEER_SHIFT = 30,
166 PORT_IRQ_STEER_MASK = (3 << PORT_IRQ_STEER_SHIFT),
168 /* PORT_CMD_ERR constants */
169 PORT_CERR_DEV = 1, /* Error bit in D2H Register FIS */
170 PORT_CERR_SDB = 2, /* Error bit in SDB FIS */
171 PORT_CERR_DATA = 3, /* Error in data FIS not detected by dev */
172 PORT_CERR_SEND = 4, /* Initial cmd FIS transmission failure */
173 PORT_CERR_INCONSISTENT = 5, /* Protocol mismatch */
174 PORT_CERR_DIRECTION = 6, /* Data direction mismatch */
175 PORT_CERR_UNDERRUN = 7, /* Ran out of SGEs while writing */
176 PORT_CERR_OVERRUN = 8, /* Ran out of SGEs while reading */
177 PORT_CERR_PKT_PROT = 11, /* DIR invalid in 1st PIO setup of ATAPI */
178 PORT_CERR_SGT_BOUNDARY = 16, /* PLD ecode 00 - SGT not on qword boundary */
179 PORT_CERR_SGT_TGTABRT = 17, /* PLD ecode 01 - target abort */
180 PORT_CERR_SGT_MSTABRT = 18, /* PLD ecode 10 - master abort */
181 PORT_CERR_SGT_PCIPERR = 19, /* PLD ecode 11 - PCI parity err while fetching SGT */
182 PORT_CERR_CMD_BOUNDARY = 24, /* ctrl[15:13] 001 - PRB not on qword boundary */
183 PORT_CERR_CMD_TGTABRT = 25, /* ctrl[15:13] 010 - target abort */
184 PORT_CERR_CMD_MSTABRT = 26, /* ctrl[15:13] 100 - master abort */
185 PORT_CERR_CMD_PCIPERR = 27, /* ctrl[15:13] 110 - PCI parity err while fetching PRB */
186 PORT_CERR_XFR_UNDEF = 32, /* PSD ecode 00 - undefined */
187 PORT_CERR_XFR_TGTABRT = 33, /* PSD ecode 01 - target abort */
188 PORT_CERR_XFR_MSTABRT = 34, /* PSD ecode 10 - master abort */
189 PORT_CERR_XFR_PCIPERR = 35, /* PSD ecode 11 - PCI prity err during transfer */
190 PORT_CERR_SENDSERVICE = 36, /* FIS received while sending service */
192 /* bits of PRB control field */
193 PRB_CTRL_PROTOCOL = (1 << 0), /* override def. ATA protocol */
194 PRB_CTRL_PACKET_READ = (1 << 4), /* PACKET cmd read */
195 PRB_CTRL_PACKET_WRITE = (1 << 5), /* PACKET cmd write */
196 PRB_CTRL_NIEN = (1 << 6), /* Mask completion irq */
197 PRB_CTRL_SRST = (1 << 7), /* Soft reset request (ign BSY?) */
199 /* PRB protocol field */
200 PRB_PROT_PACKET = (1 << 0),
201 PRB_PROT_TCQ = (1 << 1),
202 PRB_PROT_NCQ = (1 << 2),
203 PRB_PROT_READ = (1 << 3),
204 PRB_PROT_WRITE = (1 << 4),
205 PRB_PROT_TRANSPARENT = (1 << 5),
210 SGE_TRM = (1 << 31), /* Last SGE in chain */
211 SGE_LNK = (1 << 30), /* linked list
212 Points to SGT, not SGE */
213 SGE_DRD = (1 << 29), /* discard data read (/dev/null)
214 data address ignored */
222 SIL24_COMMON_FLAGS = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
223 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA,
224 SIL24_FLAG_PCIX_IRQ_WOC = (1 << 24), /* IRQ loss errata on PCI-X */
226 IRQ_STAT_4PORTS = 0xf,
229 struct sil24_ata_block {
230 struct sil24_prb prb;
231 struct sil24_sge sge[LIBATA_MAX_PRD];
234 struct sil24_atapi_block {
235 struct sil24_prb prb;
237 struct sil24_sge sge[LIBATA_MAX_PRD - 1];
240 union sil24_cmd_block {
241 struct sil24_ata_block ata;
242 struct sil24_atapi_block atapi;
248 * The preview driver always returned 0 for status. We emulate it
249 * here from the previous interrupt.
251 struct sil24_port_priv {
252 union sil24_cmd_block *cmd_block; /* 32 cmd blocks */
253 dma_addr_t cmd_block_dma; /* DMA base addr for them */
254 struct ata_taskfile tf; /* Cached taskfile registers */
257 /* ap->host_set->private_data */
258 struct sil24_host_priv {
259 void __iomem *host_base; /* global controller control (128 bytes @BAR0) */
260 void __iomem *port_base; /* port registers (4 * 8192 bytes @BAR2) */
263 static void sil24_dev_config(struct ata_port *ap, struct ata_device *dev);
264 static u8 sil24_check_status(struct ata_port *ap);
265 static u32 sil24_scr_read(struct ata_port *ap, unsigned sc_reg);
266 static void sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val);
267 static void sil24_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
268 static int sil24_probe_reset(struct ata_port *ap, unsigned int *classes);
269 static void sil24_qc_prep(struct ata_queued_cmd *qc);
270 static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc);
271 static void sil24_irq_clear(struct ata_port *ap);
272 static void sil24_eng_timeout(struct ata_port *ap);
273 static irqreturn_t sil24_interrupt(int irq, void *dev_instance, struct pt_regs *regs);
274 static int sil24_port_start(struct ata_port *ap);
275 static void sil24_port_stop(struct ata_port *ap);
276 static void sil24_host_stop(struct ata_host_set *host_set);
277 static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
279 static const struct pci_device_id sil24_pci_tbl[] = {
280 { 0x1095, 0x3124, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3124 },
281 { 0x8086, 0x3124, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3124 },
282 { 0x1095, 0x3132, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3132 },
283 { 0x1095, 0x3131, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3131 },
284 { 0x1095, 0x3531, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3131 },
285 { } /* terminate list */
288 static struct pci_driver sil24_pci_driver = {
290 .id_table = sil24_pci_tbl,
291 .probe = sil24_init_one,
292 .remove = ata_pci_remove_one, /* safe? */
295 static struct scsi_host_template sil24_sht = {
296 .module = THIS_MODULE,
298 .ioctl = ata_scsi_ioctl,
299 .queuecommand = ata_scsi_queuecmd,
300 .can_queue = ATA_DEF_QUEUE,
301 .this_id = ATA_SHT_THIS_ID,
302 .sg_tablesize = LIBATA_MAX_PRD,
303 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
304 .emulated = ATA_SHT_EMULATED,
305 .use_clustering = ATA_SHT_USE_CLUSTERING,
306 .proc_name = DRV_NAME,
307 .dma_boundary = ATA_DMA_BOUNDARY,
308 .slave_configure = ata_scsi_slave_config,
309 .bios_param = ata_std_bios_param,
312 static const struct ata_port_operations sil24_ops = {
313 .port_disable = ata_port_disable,
315 .dev_config = sil24_dev_config,
317 .check_status = sil24_check_status,
318 .check_altstatus = sil24_check_status,
319 .dev_select = ata_noop_dev_select,
321 .tf_read = sil24_tf_read,
323 .probe_reset = sil24_probe_reset,
325 .qc_prep = sil24_qc_prep,
326 .qc_issue = sil24_qc_issue,
328 .eng_timeout = sil24_eng_timeout,
330 .irq_handler = sil24_interrupt,
331 .irq_clear = sil24_irq_clear,
333 .scr_read = sil24_scr_read,
334 .scr_write = sil24_scr_write,
336 .port_start = sil24_port_start,
337 .port_stop = sil24_port_stop,
338 .host_stop = sil24_host_stop,
342 * Use bits 30-31 of host_flags to encode available port numbers.
343 * Current maxium is 4.
345 #define SIL24_NPORTS2FLAG(nports) ((((unsigned)(nports) - 1) & 0x3) << 30)
346 #define SIL24_FLAG2NPORTS(flag) ((((flag) >> 30) & 0x3) + 1)
348 static struct ata_port_info sil24_port_info[] = {
352 .host_flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(4) |
353 SIL24_FLAG_PCIX_IRQ_WOC,
354 .pio_mask = 0x1f, /* pio0-4 */
355 .mwdma_mask = 0x07, /* mwdma0-2 */
356 .udma_mask = 0x3f, /* udma0-5 */
357 .port_ops = &sil24_ops,
362 .host_flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(2),
363 .pio_mask = 0x1f, /* pio0-4 */
364 .mwdma_mask = 0x07, /* mwdma0-2 */
365 .udma_mask = 0x3f, /* udma0-5 */
366 .port_ops = &sil24_ops,
368 /* sil_3131/sil_3531 */
371 .host_flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(1),
372 .pio_mask = 0x1f, /* pio0-4 */
373 .mwdma_mask = 0x07, /* mwdma0-2 */
374 .udma_mask = 0x3f, /* udma0-5 */
375 .port_ops = &sil24_ops,
379 static void sil24_dev_config(struct ata_port *ap, struct ata_device *dev)
381 void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr;
383 if (dev->cdb_len == 16)
384 writel(PORT_CS_CDB16, port + PORT_CTRL_STAT);
386 writel(PORT_CS_CDB16, port + PORT_CTRL_CLR);
389 static inline void sil24_update_tf(struct ata_port *ap)
391 struct sil24_port_priv *pp = ap->private_data;
392 void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr;
393 struct sil24_prb __iomem *prb = port;
396 memcpy_fromio(fis, prb->fis, 6 * 4);
397 ata_tf_from_fis(fis, &pp->tf);
400 static u8 sil24_check_status(struct ata_port *ap)
402 struct sil24_port_priv *pp = ap->private_data;
403 return pp->tf.command;
406 static int sil24_scr_map[] = {
413 static u32 sil24_scr_read(struct ata_port *ap, unsigned sc_reg)
415 void __iomem *scr_addr = (void __iomem *)ap->ioaddr.scr_addr;
416 if (sc_reg < ARRAY_SIZE(sil24_scr_map)) {
418 addr = scr_addr + sil24_scr_map[sc_reg] * 4;
419 return readl(scr_addr + sil24_scr_map[sc_reg] * 4);
424 static void sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val)
426 void __iomem *scr_addr = (void __iomem *)ap->ioaddr.scr_addr;
427 if (sc_reg < ARRAY_SIZE(sil24_scr_map)) {
429 addr = scr_addr + sil24_scr_map[sc_reg] * 4;
430 writel(val, scr_addr + sil24_scr_map[sc_reg] * 4);
434 static void sil24_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
436 struct sil24_port_priv *pp = ap->private_data;
440 static int sil24_softreset(struct ata_port *ap, unsigned int *class)
442 void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr;
443 struct sil24_port_priv *pp = ap->private_data;
444 struct sil24_prb *prb = &pp->cmd_block[0].ata.prb;
445 dma_addr_t paddr = pp->cmd_block_dma;
446 u32 mask, irq_enable, irq_stat;
451 if (!sata_dev_present(ap)) {
452 DPRINTK("PHY reports no device\n");
453 *class = ATA_DEV_NONE;
457 /* temporarily turn off IRQs during SRST */
458 irq_enable = readl(port + PORT_IRQ_ENABLE_SET);
459 writel(irq_enable, port + PORT_IRQ_ENABLE_CLR);
462 * XXX: Not sure whether the following sleep is needed or not.
463 * The original driver had it. So....
467 prb->ctrl = PRB_CTRL_SRST;
468 prb->fis[1] = 0; /* no PM yet */
470 writel((u32)paddr, port + PORT_CMD_ACTIVATE);
472 mask = (PORT_IRQ_COMPLETE | PORT_IRQ_ERROR) << PORT_IRQ_RAW_SHIFT;
473 irq_stat = ata_wait_register(port + PORT_IRQ_STAT, mask, 0x0,
474 100, ATA_TMOUT_BOOT / HZ * 1000);
476 writel(irq_stat, port + PORT_IRQ_STAT); /* clear IRQs */
477 irq_stat >>= PORT_IRQ_RAW_SHIFT;
480 writel(irq_enable, port + PORT_IRQ_ENABLE_SET);
482 if (!(irq_stat & PORT_IRQ_COMPLETE)) {
483 if (irq_stat & PORT_IRQ_ERROR)
484 reason = "SRST command error";
491 *class = ata_dev_classify(&pp->tf);
493 if (*class == ATA_DEV_UNKNOWN)
494 *class = ATA_DEV_NONE;
497 DPRINTK("EXIT, class=%u\n", *class);
501 printk(KERN_ERR "ata%u: softreset failed (%s)\n", ap->id, reason);
505 static int sil24_hardreset(struct ata_port *ap, unsigned int *class)
507 unsigned int dummy_class;
509 /* sil24 doesn't report device signature after hard reset */
510 return sata_std_hardreset(ap, &dummy_class);
513 static int sil24_probe_reset(struct ata_port *ap, unsigned int *classes)
515 return ata_drive_probe_reset(ap, ata_std_probeinit,
516 sil24_softreset, sil24_hardreset,
517 ata_std_postreset, classes);
520 static inline void sil24_fill_sg(struct ata_queued_cmd *qc,
521 struct sil24_sge *sge)
523 struct scatterlist *sg;
524 unsigned int idx = 0;
526 ata_for_each_sg(sg, qc) {
527 sge->addr = cpu_to_le64(sg_dma_address(sg));
528 sge->cnt = cpu_to_le32(sg_dma_len(sg));
529 if (ata_sg_is_last(sg, qc))
530 sge->flags = cpu_to_le32(SGE_TRM);
539 static void sil24_qc_prep(struct ata_queued_cmd *qc)
541 struct ata_port *ap = qc->ap;
542 struct sil24_port_priv *pp = ap->private_data;
543 union sil24_cmd_block *cb = pp->cmd_block + qc->tag;
544 struct sil24_prb *prb;
545 struct sil24_sge *sge;
547 switch (qc->tf.protocol) {
550 case ATA_PROT_NODATA:
557 case ATA_PROT_ATAPI_DMA:
558 case ATA_PROT_ATAPI_NODATA:
559 prb = &cb->atapi.prb;
561 memset(cb->atapi.cdb, 0, 32);
562 memcpy(cb->atapi.cdb, qc->cdb, qc->dev->cdb_len);
564 if (qc->tf.protocol != ATA_PROT_ATAPI_NODATA) {
565 if (qc->tf.flags & ATA_TFLAG_WRITE)
566 prb->ctrl = PRB_CTRL_PACKET_WRITE;
568 prb->ctrl = PRB_CTRL_PACKET_READ;
575 prb = NULL; /* shut up, gcc */
580 ata_tf_to_fis(&qc->tf, prb->fis, 0);
582 if (qc->flags & ATA_QCFLAG_DMAMAP)
583 sil24_fill_sg(qc, sge);
586 static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc)
588 struct ata_port *ap = qc->ap;
589 void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr;
590 struct sil24_port_priv *pp = ap->private_data;
591 dma_addr_t paddr = pp->cmd_block_dma + qc->tag * sizeof(*pp->cmd_block);
593 writel((u32)paddr, port + PORT_CMD_ACTIVATE);
597 static void sil24_irq_clear(struct ata_port *ap)
602 static int __sil24_restart_controller(void __iomem *port)
607 writel(PORT_CS_INIT, port + PORT_CTRL_STAT);
610 for (cnt = 0; cnt < 10000; cnt++) {
611 tmp = readl(port + PORT_CTRL_STAT);
612 if (tmp & PORT_CS_RDY)
620 static void sil24_restart_controller(struct ata_port *ap)
622 if (__sil24_restart_controller((void __iomem *)ap->ioaddr.cmd_addr))
623 printk(KERN_ERR DRV_NAME
624 " ata%u: failed to restart controller\n", ap->id);
627 static int __sil24_reset_controller(void __iomem *port)
632 /* Reset controller state. Is this correct? */
633 writel(PORT_CS_DEV_RST, port + PORT_CTRL_STAT);
634 readl(port + PORT_CTRL_STAT); /* sync */
637 for (cnt = 0; cnt < 1000; cnt++) {
639 tmp = readl(port + PORT_CTRL_STAT);
640 if (!(tmp & PORT_CS_DEV_RST))
644 if (tmp & PORT_CS_DEV_RST)
647 if (tmp & PORT_CS_RDY)
650 return __sil24_restart_controller(port);
653 static void sil24_reset_controller(struct ata_port *ap)
655 printk(KERN_NOTICE DRV_NAME
656 " ata%u: resetting controller...\n", ap->id);
657 if (__sil24_reset_controller((void __iomem *)ap->ioaddr.cmd_addr))
658 printk(KERN_ERR DRV_NAME
659 " ata%u: failed to reset controller\n", ap->id);
662 static void sil24_eng_timeout(struct ata_port *ap)
664 struct ata_queued_cmd *qc;
666 qc = ata_qc_from_tag(ap, ap->active_tag);
668 printk(KERN_ERR "ata%u: command timeout\n", ap->id);
669 qc->err_mask |= AC_ERR_TIMEOUT;
670 ata_eh_qc_complete(qc);
672 sil24_reset_controller(ap);
675 static void sil24_error_intr(struct ata_port *ap, u32 slot_stat)
677 struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag);
678 struct sil24_port_priv *pp = ap->private_data;
679 void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr;
680 u32 irq_stat, cmd_err, sstatus, serror;
681 unsigned int err_mask;
683 irq_stat = readl(port + PORT_IRQ_STAT);
684 writel(irq_stat, port + PORT_IRQ_STAT); /* clear irq */
686 if (!(irq_stat & PORT_IRQ_ERROR)) {
687 /* ignore non-completion, non-error irqs for now */
688 printk(KERN_WARNING DRV_NAME
689 "ata%u: non-error exception irq (irq_stat %x)\n",
694 cmd_err = readl(port + PORT_CMD_ERR);
695 sstatus = readl(port + PORT_SSTATUS);
696 serror = readl(port + PORT_SERROR);
698 writel(serror, port + PORT_SERROR);
701 * Don't log ATAPI device errors. They're supposed to happen
702 * and any serious errors will be logged using sense data by
705 if (ap->device[0].class != ATA_DEV_ATAPI || cmd_err > PORT_CERR_SDB)
706 printk("ata%u: error interrupt on port%d\n"
707 " stat=0x%x irq=0x%x cmd_err=%d sstatus=0x%x serror=0x%x\n",
708 ap->id, ap->port_no, slot_stat, irq_stat, cmd_err, sstatus, serror);
710 if (cmd_err == PORT_CERR_DEV || cmd_err == PORT_CERR_SDB) {
712 * Device is reporting error, tf registers are valid.
715 err_mask = ac_err_mask(pp->tf.command);
716 sil24_restart_controller(ap);
719 * Other errors. libata currently doesn't have any
720 * mechanism to report these errors. Just turn on
723 err_mask = AC_ERR_OTHER;
724 sil24_reset_controller(ap);
728 qc->err_mask |= err_mask;
733 static inline void sil24_host_intr(struct ata_port *ap)
735 struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag);
736 void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr;
739 slot_stat = readl(port + PORT_SLOT_STAT);
740 if (!(slot_stat & HOST_SSTAT_ATTN)) {
741 struct sil24_port_priv *pp = ap->private_data;
743 if (ap->flags & SIL24_FLAG_PCIX_IRQ_WOC)
744 writel(PORT_IRQ_COMPLETE, port + PORT_IRQ_STAT);
747 * !HOST_SSAT_ATTN guarantees successful completion,
748 * so reading back tf registers is unnecessary for
749 * most commands. TODO: read tf registers for
750 * commands which require these values on successful
751 * completion (EXECUTE DEVICE DIAGNOSTIC, CHECK POWER,
752 * DEVICE RESET and READ PORT MULTIPLIER (any more?).
757 qc->err_mask |= ac_err_mask(pp->tf.command);
761 sil24_error_intr(ap, slot_stat);
764 static irqreturn_t sil24_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
766 struct ata_host_set *host_set = dev_instance;
767 struct sil24_host_priv *hpriv = host_set->private_data;
768 unsigned handled = 0;
772 status = readl(hpriv->host_base + HOST_IRQ_STAT);
774 if (status == 0xffffffff) {
775 printk(KERN_ERR DRV_NAME ": IRQ status == 0xffffffff, "
776 "PCI fault or device removal?\n");
780 if (!(status & IRQ_STAT_4PORTS))
783 spin_lock(&host_set->lock);
785 for (i = 0; i < host_set->n_ports; i++)
786 if (status & (1 << i)) {
787 struct ata_port *ap = host_set->ports[i];
788 if (ap && !(ap->flags & ATA_FLAG_DISABLED)) {
789 sil24_host_intr(host_set->ports[i]);
792 printk(KERN_ERR DRV_NAME
793 ": interrupt from disabled port %d\n", i);
796 spin_unlock(&host_set->lock);
798 return IRQ_RETVAL(handled);
801 static inline void sil24_cblk_free(struct sil24_port_priv *pp, struct device *dev)
803 const size_t cb_size = sizeof(*pp->cmd_block);
805 dma_free_coherent(dev, cb_size, pp->cmd_block, pp->cmd_block_dma);
808 static int sil24_port_start(struct ata_port *ap)
810 struct device *dev = ap->host_set->dev;
811 struct sil24_port_priv *pp;
812 union sil24_cmd_block *cb;
813 size_t cb_size = sizeof(*cb);
817 pp = kzalloc(sizeof(*pp), GFP_KERNEL);
821 pp->tf.command = ATA_DRDY;
823 cb = dma_alloc_coherent(dev, cb_size, &cb_dma, GFP_KERNEL);
826 memset(cb, 0, cb_size);
828 rc = ata_pad_alloc(ap, dev);
833 pp->cmd_block_dma = cb_dma;
835 ap->private_data = pp;
840 sil24_cblk_free(pp, dev);
847 static void sil24_port_stop(struct ata_port *ap)
849 struct device *dev = ap->host_set->dev;
850 struct sil24_port_priv *pp = ap->private_data;
852 sil24_cblk_free(pp, dev);
853 ata_pad_free(ap, dev);
857 static void sil24_host_stop(struct ata_host_set *host_set)
859 struct sil24_host_priv *hpriv = host_set->private_data;
860 struct pci_dev *pdev = to_pci_dev(host_set->dev);
862 pci_iounmap(pdev, hpriv->host_base);
863 pci_iounmap(pdev, hpriv->port_base);
867 static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
869 static int printed_version = 0;
870 unsigned int board_id = (unsigned int)ent->driver_data;
871 struct ata_port_info *pinfo = &sil24_port_info[board_id];
872 struct ata_probe_ent *probe_ent = NULL;
873 struct sil24_host_priv *hpriv = NULL;
874 void __iomem *host_base = NULL;
875 void __iomem *port_base = NULL;
879 if (!printed_version++)
880 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
882 rc = pci_enable_device(pdev);
886 rc = pci_request_regions(pdev, DRV_NAME);
891 /* map mmio registers */
892 host_base = pci_iomap(pdev, 0, 0);
895 port_base = pci_iomap(pdev, 2, 0);
899 /* allocate & init probe_ent and hpriv */
900 probe_ent = kzalloc(sizeof(*probe_ent), GFP_KERNEL);
904 hpriv = kzalloc(sizeof(*hpriv), GFP_KERNEL);
908 probe_ent->dev = pci_dev_to_dev(pdev);
909 INIT_LIST_HEAD(&probe_ent->node);
911 probe_ent->sht = pinfo->sht;
912 probe_ent->host_flags = pinfo->host_flags;
913 probe_ent->pio_mask = pinfo->pio_mask;
914 probe_ent->mwdma_mask = pinfo->mwdma_mask;
915 probe_ent->udma_mask = pinfo->udma_mask;
916 probe_ent->port_ops = pinfo->port_ops;
917 probe_ent->n_ports = SIL24_FLAG2NPORTS(pinfo->host_flags);
919 probe_ent->irq = pdev->irq;
920 probe_ent->irq_flags = SA_SHIRQ;
921 probe_ent->mmio_base = port_base;
922 probe_ent->private_data = hpriv;
924 hpriv->host_base = host_base;
925 hpriv->port_base = port_base;
928 * Configure the device
931 * FIXME: This device is certainly 64-bit capable. We just
932 * don't know how to use it. After fixing 32bit activation in
933 * this function, enable 64bit masks here.
935 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
937 dev_printk(KERN_ERR, &pdev->dev,
938 "32-bit DMA enable failed\n");
941 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
943 dev_printk(KERN_ERR, &pdev->dev,
944 "32-bit consistent DMA enable failed\n");
949 writel(0, host_base + HOST_FLASH_CMD);
951 /* Apply workaround for completion IRQ loss on PCI-X errata */
952 if (probe_ent->host_flags & SIL24_FLAG_PCIX_IRQ_WOC) {
953 tmp = readl(host_base + HOST_CTRL);
954 if (tmp & (HOST_CTRL_TRDY | HOST_CTRL_STOP | HOST_CTRL_DEVSEL))
955 dev_printk(KERN_INFO, &pdev->dev,
956 "Applying completion IRQ loss on PCI-X "
959 probe_ent->host_flags &= ~SIL24_FLAG_PCIX_IRQ_WOC;
962 /* clear global reset & mask interrupts during initialization */
963 writel(0, host_base + HOST_CTRL);
965 for (i = 0; i < probe_ent->n_ports; i++) {
966 void __iomem *port = port_base + i * PORT_REGS_SIZE;
967 unsigned long portu = (unsigned long)port;
969 probe_ent->port[i].cmd_addr = portu + PORT_PRB;
970 probe_ent->port[i].scr_addr = portu + PORT_SCONTROL;
972 ata_std_ports(&probe_ent->port[i]);
974 /* Initial PHY setting */
975 writel(0x20c, port + PORT_PHY_CFG);
978 tmp = readl(port + PORT_CTRL_STAT);
979 if (tmp & PORT_CS_PORT_RST) {
980 writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR);
981 tmp = ata_wait_register(port + PORT_CTRL_STAT,
983 PORT_CS_PORT_RST, 10, 100);
984 if (tmp & PORT_CS_PORT_RST)
985 dev_printk(KERN_ERR, &pdev->dev,
986 "failed to clear port RST\n");
989 /* Configure IRQ WoC */
990 if (probe_ent->host_flags & SIL24_FLAG_PCIX_IRQ_WOC)
991 writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_STAT);
993 writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_CLR);
995 /* Zero error counters. */
996 writel(0x8000, port + PORT_DECODE_ERR_THRESH);
997 writel(0x8000, port + PORT_CRC_ERR_THRESH);
998 writel(0x8000, port + PORT_HSHK_ERR_THRESH);
999 writel(0x0000, port + PORT_DECODE_ERR_CNT);
1000 writel(0x0000, port + PORT_CRC_ERR_CNT);
1001 writel(0x0000, port + PORT_HSHK_ERR_CNT);
1003 /* FIXME: 32bit activation? */
1004 writel(0, port + PORT_ACTIVATE_UPPER_ADDR);
1005 writel(PORT_CS_32BIT_ACTV, port + PORT_CTRL_STAT);
1007 /* Configure interrupts */
1008 writel(0xffff, port + PORT_IRQ_ENABLE_CLR);
1009 writel(PORT_IRQ_COMPLETE | PORT_IRQ_ERROR |
1010 PORT_IRQ_SDB_NOTIFY, port + PORT_IRQ_ENABLE_SET);
1012 /* Clear interrupts */
1013 writel(0x0fff0fff, port + PORT_IRQ_STAT);
1014 writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_CLR);
1016 /* Clear port multiplier enable and resume bits */
1017 writel(PORT_CS_PM_EN | PORT_CS_RESUME, port + PORT_CTRL_CLR);
1020 if (__sil24_reset_controller(port))
1021 dev_printk(KERN_ERR, &pdev->dev,
1022 "failed to reset controller\n");
1025 /* Turn on interrupts */
1026 writel(IRQ_STAT_4PORTS, host_base + HOST_CTRL);
1028 pci_set_master(pdev);
1030 /* FIXME: check ata_device_add return value */
1031 ata_device_add(probe_ent);
1038 pci_iounmap(pdev, host_base);
1040 pci_iounmap(pdev, port_base);
1043 pci_release_regions(pdev);
1045 pci_disable_device(pdev);
1049 static int __init sil24_init(void)
1051 return pci_module_init(&sil24_pci_driver);
1054 static void __exit sil24_exit(void)
1056 pci_unregister_driver(&sil24_pci_driver);
1059 MODULE_AUTHOR("Tejun Heo");
1060 MODULE_DESCRIPTION("Silicon Image 3124/3132 SATA low-level driver");
1061 MODULE_LICENSE("GPL");
1062 MODULE_DEVICE_TABLE(pci, sil24_pci_tbl);
1064 module_init(sil24_init);
1065 module_exit(sil24_exit);