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Merge master.kernel.org:/home/rmk/linux-2.6-arm
[linux-2.6/mini2440.git] / drivers / ata / sata_sil24.c
blob75d961599651b8198b9e4eb6b613cdf3d6cb00d4
1 /*
2 * sata_sil24.c - Driver for Silicon Image 3124/3132 SATA-2 controllers
3 *
4 * Copyright 2005 Tejun Heo
5 *
6 * Based on preview driver from Silicon Image.
7 *
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
11 * later version.
12 *
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.
17 *
18 */
19
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>
31
32 #define DRV_NAME "sata_sil24"
33 #define DRV_VERSION "0.8"
34
35 /*
36 * Port request block (PRB) 32 bytes
37 */
38 struct sil24_prb {
39 __le16 ctrl;
40 __le16 prot;
41 __le32 rx_cnt;
42 u8 fis[6 * 4];
43 };
44
45 /*
46 * Scatter gather entry (SGE) 16 bytes
47 */
48 struct sil24_sge {
49 __le64 addr;
50 __le32 cnt;
51 __le32 flags;
52 };
53
54 /*
55 * Port multiplier
56 */
57 struct sil24_port_multiplier {
58 __le32 diag;
59 __le32 sactive;
60 };
61
62 enum {
63 SIL24_HOST_BAR = 0,
64 SIL24_PORT_BAR = 2,
65
66 /*
67 * Global controller registers (128 bytes @ BAR0)
68 */
69 /* 32 bit regs */
70 HOST_SLOT_STAT = 0x00, /* 32 bit slot stat * 4 */
71 HOST_CTRL = 0x40,
72 HOST_IRQ_STAT = 0x44,
73 HOST_PHY_CFG = 0x48,
74 HOST_BIST_CTRL = 0x50,
75 HOST_BIST_PTRN = 0x54,
76 HOST_BIST_STAT = 0x58,
77 HOST_MEM_BIST_STAT = 0x5c,
78 HOST_FLASH_CMD = 0x70,
79 /* 8 bit regs */
80 HOST_FLASH_DATA = 0x74,
81 HOST_TRANSITION_DETECT = 0x75,
82 HOST_GPIO_CTRL = 0x76,
83 HOST_I2C_ADDR = 0x78, /* 32 bit */
84 HOST_I2C_DATA = 0x7c,
85 HOST_I2C_XFER_CNT = 0x7e,
86 HOST_I2C_CTRL = 0x7f,
87
88 /* HOST_SLOT_STAT bits */
89 HOST_SSTAT_ATTN = (1 << 31),
90
91 /* HOST_CTRL bits */
92 HOST_CTRL_M66EN = (1 << 16), /* M66EN PCI bus signal */
93 HOST_CTRL_TRDY = (1 << 17), /* latched PCI TRDY */
94 HOST_CTRL_STOP = (1 << 18), /* latched PCI STOP */
95 HOST_CTRL_DEVSEL = (1 << 19), /* latched PCI DEVSEL */
96 HOST_CTRL_REQ64 = (1 << 20), /* latched PCI REQ64 */
97 HOST_CTRL_GLOBAL_RST = (1 << 31), /* global reset */
98
99 /*
100 * Port registers
101 * (8192 bytes @ +0x0000, +0x2000, +0x4000 and +0x6000 @ BAR2)
102 */
103 PORT_REGS_SIZE = 0x2000,
104
105 PORT_LRAM = 0x0000, /* 31 LRAM slots and PMP regs */
106 PORT_LRAM_SLOT_SZ = 0x0080, /* 32 bytes PRB + 2 SGE, ACT... */
107
108 PORT_PMP = 0x0f80, /* 8 bytes PMP * 16 (128 bytes) */
109 PORT_PMP_STATUS = 0x0000, /* port device status offset */
110 PORT_PMP_QACTIVE = 0x0004, /* port device QActive offset */
111 PORT_PMP_SIZE = 0x0008, /* 8 bytes per PMP */
112
113 /* 32 bit regs */
114 PORT_CTRL_STAT = 0x1000, /* write: ctrl-set, read: stat */
115 PORT_CTRL_CLR = 0x1004, /* write: ctrl-clear */
116 PORT_IRQ_STAT = 0x1008, /* high: status, low: interrupt */
117 PORT_IRQ_ENABLE_SET = 0x1010, /* write: enable-set */
118 PORT_IRQ_ENABLE_CLR = 0x1014, /* write: enable-clear */
119 PORT_ACTIVATE_UPPER_ADDR= 0x101c,
120 PORT_EXEC_FIFO = 0x1020, /* command execution fifo */
121 PORT_CMD_ERR = 0x1024, /* command error number */
122 PORT_FIS_CFG = 0x1028,
123 PORT_FIFO_THRES = 0x102c,
124 /* 16 bit regs */
125 PORT_DECODE_ERR_CNT = 0x1040,
126 PORT_DECODE_ERR_THRESH = 0x1042,
127 PORT_CRC_ERR_CNT = 0x1044,
128 PORT_CRC_ERR_THRESH = 0x1046,
129 PORT_HSHK_ERR_CNT = 0x1048,
130 PORT_HSHK_ERR_THRESH = 0x104a,
131 /* 32 bit regs */
132 PORT_PHY_CFG = 0x1050,
133 PORT_SLOT_STAT = 0x1800,
134 PORT_CMD_ACTIVATE = 0x1c00, /* 64 bit cmd activate * 31 (248 bytes) */
135 PORT_CONTEXT = 0x1e04,
136 PORT_EXEC_DIAG = 0x1e00, /* 32bit exec diag * 16 (64 bytes, 0-10 used on 3124) */
137 PORT_PSD_DIAG = 0x1e40, /* 32bit psd diag * 16 (64 bytes, 0-8 used on 3124) */
138 PORT_SCONTROL = 0x1f00,
139 PORT_SSTATUS = 0x1f04,
140 PORT_SERROR = 0x1f08,
141 PORT_SACTIVE = 0x1f0c,
142
143 /* PORT_CTRL_STAT bits */
144 PORT_CS_PORT_RST = (1 << 0), /* port reset */
145 PORT_CS_DEV_RST = (1 << 1), /* device reset */
146 PORT_CS_INIT = (1 << 2), /* port initialize */
147 PORT_CS_IRQ_WOC = (1 << 3), /* interrupt write one to clear */
148 PORT_CS_CDB16 = (1 << 5), /* 0=12b cdb, 1=16b cdb */
149 PORT_CS_PMP_RESUME = (1 << 6), /* PMP resume */
150 PORT_CS_32BIT_ACTV = (1 << 10), /* 32-bit activation */
151 PORT_CS_PMP_EN = (1 << 13), /* port multiplier enable */
152 PORT_CS_RDY = (1 << 31), /* port ready to accept commands */
153
154 /* PORT_IRQ_STAT/ENABLE_SET/CLR */
155 /* bits[11:0] are masked */
156 PORT_IRQ_COMPLETE = (1 << 0), /* command(s) completed */
157 PORT_IRQ_ERROR = (1 << 1), /* command execution error */
158 PORT_IRQ_PORTRDY_CHG = (1 << 2), /* port ready change */
159 PORT_IRQ_PWR_CHG = (1 << 3), /* power management change */
160 PORT_IRQ_PHYRDY_CHG = (1 << 4), /* PHY ready change */
161 PORT_IRQ_COMWAKE = (1 << 5), /* COMWAKE received */
162 PORT_IRQ_UNK_FIS = (1 << 6), /* unknown FIS received */
163 PORT_IRQ_DEV_XCHG = (1 << 7), /* device exchanged */
164 PORT_IRQ_8B10B = (1 << 8), /* 8b/10b decode error threshold */
165 PORT_IRQ_CRC = (1 << 9), /* CRC error threshold */
166 PORT_IRQ_HANDSHAKE = (1 << 10), /* handshake error threshold */
167 PORT_IRQ_SDB_NOTIFY = (1 << 11), /* SDB notify received */
168
169 DEF_PORT_IRQ = PORT_IRQ_COMPLETE | PORT_IRQ_ERROR |
170 PORT_IRQ_PHYRDY_CHG | PORT_IRQ_DEV_XCHG |
171 PORT_IRQ_UNK_FIS,
172
173 /* bits[27:16] are unmasked (raw) */
174 PORT_IRQ_RAW_SHIFT = 16,
175 PORT_IRQ_MASKED_MASK = 0x7ff,
176 PORT_IRQ_RAW_MASK = (0x7ff << PORT_IRQ_RAW_SHIFT),
177
178 /* ENABLE_SET/CLR specific, intr steering - 2 bit field */
179 PORT_IRQ_STEER_SHIFT = 30,
180 PORT_IRQ_STEER_MASK = (3 << PORT_IRQ_STEER_SHIFT),
181
182 /* PORT_CMD_ERR constants */
183 PORT_CERR_DEV = 1, /* Error bit in D2H Register FIS */
184 PORT_CERR_SDB = 2, /* Error bit in SDB FIS */
185 PORT_CERR_DATA = 3, /* Error in data FIS not detected by dev */
186 PORT_CERR_SEND = 4, /* Initial cmd FIS transmission failure */
187 PORT_CERR_INCONSISTENT = 5, /* Protocol mismatch */
188 PORT_CERR_DIRECTION = 6, /* Data direction mismatch */
189 PORT_CERR_UNDERRUN = 7, /* Ran out of SGEs while writing */
190 PORT_CERR_OVERRUN = 8, /* Ran out of SGEs while reading */
191 PORT_CERR_PKT_PROT = 11, /* DIR invalid in 1st PIO setup of ATAPI */
192 PORT_CERR_SGT_BOUNDARY = 16, /* PLD ecode 00 - SGT not on qword boundary */
193 PORT_CERR_SGT_TGTABRT = 17, /* PLD ecode 01 - target abort */
194 PORT_CERR_SGT_MSTABRT = 18, /* PLD ecode 10 - master abort */
195 PORT_CERR_SGT_PCIPERR = 19, /* PLD ecode 11 - PCI parity err while fetching SGT */
196 PORT_CERR_CMD_BOUNDARY = 24, /* ctrl[15:13] 001 - PRB not on qword boundary */
197 PORT_CERR_CMD_TGTABRT = 25, /* ctrl[15:13] 010 - target abort */
198 PORT_CERR_CMD_MSTABRT = 26, /* ctrl[15:13] 100 - master abort */
199 PORT_CERR_CMD_PCIPERR = 27, /* ctrl[15:13] 110 - PCI parity err while fetching PRB */
200 PORT_CERR_XFR_UNDEF = 32, /* PSD ecode 00 - undefined */
201 PORT_CERR_XFR_TGTABRT = 33, /* PSD ecode 01 - target abort */
202 PORT_CERR_XFR_MSTABRT = 34, /* PSD ecode 10 - master abort */
203 PORT_CERR_XFR_PCIPERR = 35, /* PSD ecode 11 - PCI prity err during transfer */
204 PORT_CERR_SENDSERVICE = 36, /* FIS received while sending service */
205
206 /* bits of PRB control field */
207 PRB_CTRL_PROTOCOL = (1 << 0), /* override def. ATA protocol */
208 PRB_CTRL_PACKET_READ = (1 << 4), /* PACKET cmd read */
209 PRB_CTRL_PACKET_WRITE = (1 << 5), /* PACKET cmd write */
210 PRB_CTRL_NIEN = (1 << 6), /* Mask completion irq */
211 PRB_CTRL_SRST = (1 << 7), /* Soft reset request (ign BSY?) */
212
213 /* PRB protocol field */
214 PRB_PROT_PACKET = (1 << 0),
215 PRB_PROT_TCQ = (1 << 1),
216 PRB_PROT_NCQ = (1 << 2),
217 PRB_PROT_READ = (1 << 3),
218 PRB_PROT_WRITE = (1 << 4),
219 PRB_PROT_TRANSPARENT = (1 << 5),
220
221 /*
222 * Other constants
223 */
224 SGE_TRM = (1 << 31), /* Last SGE in chain */
225 SGE_LNK = (1 << 30), /* linked list
226 Points to SGT, not SGE */
227 SGE_DRD = (1 << 29), /* discard data read (/dev/null)
228 data address ignored */
229
230 SIL24_MAX_CMDS = 31,
231
232 /* board id */
233 BID_SIL3124 = 0,
234 BID_SIL3132 = 1,
235 BID_SIL3131 = 2,
236
237 /* host flags */
238 SIL24_COMMON_FLAGS = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
239 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
240 ATA_FLAG_NCQ | ATA_FLAG_SKIP_D2H_BSY,
241 SIL24_FLAG_PCIX_IRQ_WOC = (1 << 24), /* IRQ loss errata on PCI-X */
242
243 IRQ_STAT_4PORTS = 0xf,
244 };
245
246 struct sil24_ata_block {
247 struct sil24_prb prb;
248 struct sil24_sge sge[LIBATA_MAX_PRD];
249 };
250
251 struct sil24_atapi_block {
252 struct sil24_prb prb;
253 u8 cdb[16];
254 struct sil24_sge sge[LIBATA_MAX_PRD - 1];
255 };
256
257 union sil24_cmd_block {
258 struct sil24_ata_block ata;
259 struct sil24_atapi_block atapi;
260 };
261
262 static struct sil24_cerr_info {
263 unsigned int err_mask, action;
264 const char *desc;
265 } sil24_cerr_db[] = {
266 [0] = { AC_ERR_DEV, ATA_EH_REVALIDATE,
267 "device error" },
268 [PORT_CERR_DEV] = { AC_ERR_DEV, ATA_EH_REVALIDATE,
269 "device error via D2H FIS" },
270 [PORT_CERR_SDB] = { AC_ERR_DEV, ATA_EH_REVALIDATE,
271 "device error via SDB FIS" },
272 [PORT_CERR_DATA] = { AC_ERR_ATA_BUS, ATA_EH_SOFTRESET,
273 "error in data FIS" },
274 [PORT_CERR_SEND] = { AC_ERR_ATA_BUS, ATA_EH_SOFTRESET,
275 "failed to transmit command FIS" },
276 [PORT_CERR_INCONSISTENT] = { AC_ERR_HSM, ATA_EH_SOFTRESET,
277 "protocol mismatch" },
278 [PORT_CERR_DIRECTION] = { AC_ERR_HSM, ATA_EH_SOFTRESET,
279 "data directon mismatch" },
280 [PORT_CERR_UNDERRUN] = { AC_ERR_HSM, ATA_EH_SOFTRESET,
281 "ran out of SGEs while writing" },
282 [PORT_CERR_OVERRUN] = { AC_ERR_HSM, ATA_EH_SOFTRESET,
283 "ran out of SGEs while reading" },
284 [PORT_CERR_PKT_PROT] = { AC_ERR_HSM, ATA_EH_SOFTRESET,
285 "invalid data directon for ATAPI CDB" },
286 [PORT_CERR_SGT_BOUNDARY] = { AC_ERR_SYSTEM, ATA_EH_SOFTRESET,
287 "SGT no on qword boundary" },
288 [PORT_CERR_SGT_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET,
289 "PCI target abort while fetching SGT" },
290 [PORT_CERR_SGT_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET,
291 "PCI master abort while fetching SGT" },
292 [PORT_CERR_SGT_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET,
293 "PCI parity error while fetching SGT" },
294 [PORT_CERR_CMD_BOUNDARY] = { AC_ERR_SYSTEM, ATA_EH_SOFTRESET,
295 "PRB not on qword boundary" },
296 [PORT_CERR_CMD_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET,
297 "PCI target abort while fetching PRB" },
298 [PORT_CERR_CMD_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET,
299 "PCI master abort while fetching PRB" },
300 [PORT_CERR_CMD_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET,
301 "PCI parity error while fetching PRB" },
302 [PORT_CERR_XFR_UNDEF] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET,
303 "undefined error while transferring data" },
304 [PORT_CERR_XFR_TGTABRT] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET,
305 "PCI target abort while transferring data" },
306 [PORT_CERR_XFR_MSTABRT] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET,
307 "PCI master abort while transferring data" },
308 [PORT_CERR_XFR_PCIPERR] = { AC_ERR_HOST_BUS, ATA_EH_SOFTRESET,
309 "PCI parity error while transferring data" },
310 [PORT_CERR_SENDSERVICE] = { AC_ERR_HSM, ATA_EH_SOFTRESET,
311 "FIS received while sending service FIS" },
312 };
313
314 /*
315 * ap->private_data
316 *
317 * The preview driver always returned 0 for status. We emulate it
318 * here from the previous interrupt.
319 */
320 struct sil24_port_priv {
321 union sil24_cmd_block *cmd_block; /* 32 cmd blocks */
322 dma_addr_t cmd_block_dma; /* DMA base addr for them */
323 struct ata_taskfile tf; /* Cached taskfile registers */
324 };
325
326 static void sil24_dev_config(struct ata_port *ap, struct ata_device *dev);
327 static u8 sil24_check_status(struct ata_port *ap);
328 static u32 sil24_scr_read(struct ata_port *ap, unsigned sc_reg);
329 static void sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val);
330 static void sil24_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
331 static void sil24_qc_prep(struct ata_queued_cmd *qc);
332 static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc);
333 static void sil24_irq_clear(struct ata_port *ap);
334 static irqreturn_t sil24_interrupt(int irq, void *dev_instance);
335 static void sil24_freeze(struct ata_port *ap);
336 static void sil24_thaw(struct ata_port *ap);
337 static void sil24_error_handler(struct ata_port *ap);
338 static void sil24_post_internal_cmd(struct ata_queued_cmd *qc);
339 static int sil24_port_start(struct ata_port *ap);
340 static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
341 #ifdef CONFIG_PM
342 static int sil24_pci_device_resume(struct pci_dev *pdev);
343 #endif
344
345 static const struct pci_device_id sil24_pci_tbl[] = {
346 { PCI_VDEVICE(CMD, 0x3124), BID_SIL3124 },
347 { PCI_VDEVICE(INTEL, 0x3124), BID_SIL3124 },
348 { PCI_VDEVICE(CMD, 0x3132), BID_SIL3132 },
349 { PCI_VDEVICE(CMD, 0x3131), BID_SIL3131 },
350 { PCI_VDEVICE(CMD, 0x3531), BID_SIL3131 },
351
352 { } /* terminate list */
353 };
354
355 static struct pci_driver sil24_pci_driver = {
356 .name = DRV_NAME,
357 .id_table = sil24_pci_tbl,
358 .probe = sil24_init_one,
359 .remove = ata_pci_remove_one,
360 #ifdef CONFIG_PM
361 .suspend = ata_pci_device_suspend,
362 .resume = sil24_pci_device_resume,
363 #endif
364 };
365
366 static struct scsi_host_template sil24_sht = {
367 .module = THIS_MODULE,
368 .name = DRV_NAME,
369 .ioctl = ata_scsi_ioctl,
370 .queuecommand = ata_scsi_queuecmd,
371 .change_queue_depth = ata_scsi_change_queue_depth,
372 .can_queue = SIL24_MAX_CMDS,
373 .this_id = ATA_SHT_THIS_ID,
374 .sg_tablesize = LIBATA_MAX_PRD,
375 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
376 .emulated = ATA_SHT_EMULATED,
377 .use_clustering = ATA_SHT_USE_CLUSTERING,
378 .proc_name = DRV_NAME,
379 .dma_boundary = ATA_DMA_BOUNDARY,
380 .slave_configure = ata_scsi_slave_config,
381 .slave_destroy = ata_scsi_slave_destroy,
382 .bios_param = ata_std_bios_param,
383 #ifdef CONFIG_PM
384 .suspend = ata_scsi_device_suspend,
385 .resume = ata_scsi_device_resume,
386 #endif
387 };
388
389 static const struct ata_port_operations sil24_ops = {
390 .port_disable = ata_port_disable,
391
392 .dev_config = sil24_dev_config,
393
394 .check_status = sil24_check_status,
395 .check_altstatus = sil24_check_status,
396 .dev_select = ata_noop_dev_select,
397
398 .tf_read = sil24_tf_read,
399
400 .qc_prep = sil24_qc_prep,
401 .qc_issue = sil24_qc_issue,
402
403 .irq_handler = sil24_interrupt,
404 .irq_clear = sil24_irq_clear,
405 .irq_on = ata_dummy_irq_on,
406 .irq_ack = ata_dummy_irq_ack,
407
408 .scr_read = sil24_scr_read,
409 .scr_write = sil24_scr_write,
410
411 .freeze = sil24_freeze,
412 .thaw = sil24_thaw,
413 .error_handler = sil24_error_handler,
414 .post_internal_cmd = sil24_post_internal_cmd,
415
416 .port_start = sil24_port_start,
417 };
418
419 /*
420 * Use bits 30-31 of port_flags to encode available port numbers.
421 * Current maxium is 4.
422 */
423 #define SIL24_NPORTS2FLAG(nports) ((((unsigned)(nports) - 1) & 0x3) << 30)
424 #define SIL24_FLAG2NPORTS(flag) ((((flag) >> 30) & 0x3) + 1)
425
426 static struct ata_port_info sil24_port_info[] = {
427 /* sil_3124 */
428 {
429 .sht = &sil24_sht,
430 .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(4) |
431 SIL24_FLAG_PCIX_IRQ_WOC,
432 .pio_mask = 0x1f, /* pio0-4 */
433 .mwdma_mask = 0x07, /* mwdma0-2 */
434 .udma_mask = 0x3f, /* udma0-5 */
435 .port_ops = &sil24_ops,
436 },
437 /* sil_3132 */
438 {
439 .sht = &sil24_sht,
440 .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(2),
441 .pio_mask = 0x1f, /* pio0-4 */
442 .mwdma_mask = 0x07, /* mwdma0-2 */
443 .udma_mask = 0x3f, /* udma0-5 */
444 .port_ops = &sil24_ops,
445 },
446 /* sil_3131/sil_3531 */
447 {
448 .sht = &sil24_sht,
449 .flags = SIL24_COMMON_FLAGS | SIL24_NPORTS2FLAG(1),
450 .pio_mask = 0x1f, /* pio0-4 */
451 .mwdma_mask = 0x07, /* mwdma0-2 */
452 .udma_mask = 0x3f, /* udma0-5 */
453 .port_ops = &sil24_ops,
454 },
455 };
456
457 static int sil24_tag(int tag)
458 {
459 if (unlikely(ata_tag_internal(tag)))
460 return 0;
461 return tag;
462 }
463
464 static void sil24_dev_config(struct ata_port *ap, struct ata_device *dev)
465 {
466 void __iomem *port = ap->ioaddr.cmd_addr;
467
468 if (dev->cdb_len == 16)
469 writel(PORT_CS_CDB16, port + PORT_CTRL_STAT);
470 else
471 writel(PORT_CS_CDB16, port + PORT_CTRL_CLR);
472 }
473
474 static inline void sil24_update_tf(struct ata_port *ap)
475 {
476 struct sil24_port_priv *pp = ap->private_data;
477 void __iomem *port = ap->ioaddr.cmd_addr;
478 struct sil24_prb __iomem *prb = port;
479 u8 fis[6 * 4];
480
481 memcpy_fromio(fis, prb->fis, 6 * 4);
482 ata_tf_from_fis(fis, &pp->tf);
483 }
484
485 static u8 sil24_check_status(struct ata_port *ap)
486 {
487 struct sil24_port_priv *pp = ap->private_data;
488 return pp->tf.command;
489 }
490
491 static int sil24_scr_map[] = {
492 [SCR_CONTROL] = 0,
493 [SCR_STATUS] = 1,
494 [SCR_ERROR] = 2,
495 [SCR_ACTIVE] = 3,
496 };
497
498 static u32 sil24_scr_read(struct ata_port *ap, unsigned sc_reg)
499 {
500 void __iomem *scr_addr = ap->ioaddr.scr_addr;
501 if (sc_reg < ARRAY_SIZE(sil24_scr_map)) {
502 void __iomem *addr;
503 addr = scr_addr + sil24_scr_map[sc_reg] * 4;
504 return readl(scr_addr + sil24_scr_map[sc_reg] * 4);
505 }
506 return 0xffffffffU;
507 }
508
509 static void sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val)
510 {
511 void __iomem *scr_addr = ap->ioaddr.scr_addr;
512 if (sc_reg < ARRAY_SIZE(sil24_scr_map)) {
513 void __iomem *addr;
514 addr = scr_addr + sil24_scr_map[sc_reg] * 4;
515 writel(val, scr_addr + sil24_scr_map[sc_reg] * 4);
516 }
517 }
518
519 static void sil24_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
520 {
521 struct sil24_port_priv *pp = ap->private_data;
522 *tf = pp->tf;
523 }
524
525 static int sil24_init_port(struct ata_port *ap)
526 {
527 void __iomem *port = ap->ioaddr.cmd_addr;
528 u32 tmp;
529
530 writel(PORT_CS_INIT, port + PORT_CTRL_STAT);
531 ata_wait_register(port + PORT_CTRL_STAT,
532 PORT_CS_INIT, PORT_CS_INIT, 10, 100);
533 tmp = ata_wait_register(port + PORT_CTRL_STAT,
534 PORT_CS_RDY, 0, 10, 100);
535
536 if ((tmp & (PORT_CS_INIT | PORT_CS_RDY)) != PORT_CS_RDY)
537 return -EIO;
538 return 0;
539 }
540
541 static int sil24_softreset(struct ata_port *ap, unsigned int *class)
542 {
543 void __iomem *port = ap->ioaddr.cmd_addr;
544 struct sil24_port_priv *pp = ap->private_data;
545 struct sil24_prb *prb = &pp->cmd_block[0].ata.prb;
546 dma_addr_t paddr = pp->cmd_block_dma;
547 u32 mask, irq_stat;
548 const char *reason;
549
550 DPRINTK("ENTER\n");
551
552 if (ata_port_offline(ap)) {
553 DPRINTK("PHY reports no device\n");
554 *class = ATA_DEV_NONE;
555 goto out;
556 }
557
558 /* put the port into known state */
559 if (sil24_init_port(ap)) {
560 reason ="port not ready";
561 goto err;
562 }
563
564 /* do SRST */
565 prb->ctrl = cpu_to_le16(PRB_CTRL_SRST);
566 prb->fis[1] = 0; /* no PMP yet */
567
568 writel((u32)paddr, port + PORT_CMD_ACTIVATE);
569 writel((u64)paddr >> 32, port + PORT_CMD_ACTIVATE + 4);
570
571 mask = (PORT_IRQ_COMPLETE | PORT_IRQ_ERROR) << PORT_IRQ_RAW_SHIFT;
572 irq_stat = ata_wait_register(port + PORT_IRQ_STAT, mask, 0x0,
573 100, ATA_TMOUT_BOOT / HZ * 1000);
574
575 writel(irq_stat, port + PORT_IRQ_STAT); /* clear IRQs */
576 irq_stat >>= PORT_IRQ_RAW_SHIFT;
577
578 if (!(irq_stat & PORT_IRQ_COMPLETE)) {
579 if (irq_stat & PORT_IRQ_ERROR)
580 reason = "SRST command error";
581 else
582 reason = "timeout";
583 goto err;
584 }
585
586 sil24_update_tf(ap);
587 *class = ata_dev_classify(&pp->tf);
588
589 if (*class == ATA_DEV_UNKNOWN)
590 *class = ATA_DEV_NONE;
591
592 out:
593 DPRINTK("EXIT, class=%u\n", *class);
594 return 0;
595
596 err:
597 ata_port_printk(ap, KERN_ERR, "softreset failed (%s)\n", reason);
598 return -EIO;
599 }
600
601 static int sil24_hardreset(struct ata_port *ap, unsigned int *class)
602 {
603 void __iomem *port = ap->ioaddr.cmd_addr;
604 const char *reason;
605 int tout_msec, rc;
606 u32 tmp;
607
608 /* sil24 does the right thing(tm) without any protection */
609 sata_set_spd(ap);
610
611 tout_msec = 100;
612 if (ata_port_online(ap))
613 tout_msec = 5000;
614
615 writel(PORT_CS_DEV_RST, port + PORT_CTRL_STAT);
616 tmp = ata_wait_register(port + PORT_CTRL_STAT,
617 PORT_CS_DEV_RST, PORT_CS_DEV_RST, 10, tout_msec);
618
619 /* SStatus oscillates between zero and valid status after
620 * DEV_RST, debounce it.
621 */
622 rc = sata_phy_debounce(ap, sata_deb_timing_long);
623 if (rc) {
624 reason = "PHY debouncing failed";
625 goto err;
626 }
627
628 if (tmp & PORT_CS_DEV_RST) {
629 if (ata_port_offline(ap))
630 return 0;
631 reason = "link not ready";
632 goto err;
633 }
634
635 /* Sil24 doesn't store signature FIS after hardreset, so we
636 * can't wait for BSY to clear. Some devices take a long time
637 * to get ready and those devices will choke if we don't wait
638 * for BSY clearance here. Tell libata to perform follow-up
639 * softreset.
640 */
641 return -EAGAIN;
642
643 err:
644 ata_port_printk(ap, KERN_ERR, "hardreset failed (%s)\n", reason);
645 return -EIO;
646 }
647
648 static inline void sil24_fill_sg(struct ata_queued_cmd *qc,
649 struct sil24_sge *sge)
650 {
651 struct scatterlist *sg;
652
653 ata_for_each_sg(sg, qc) {
654 sge->addr = cpu_to_le64(sg_dma_address(sg));
655 sge->cnt = cpu_to_le32(sg_dma_len(sg));
656 if (ata_sg_is_last(sg, qc))
657 sge->flags = cpu_to_le32(SGE_TRM);
658 else
659 sge->flags = 0;
660 sge++;
661 }
662 }
663
664 static void sil24_qc_prep(struct ata_queued_cmd *qc)
665 {
666 struct ata_port *ap = qc->ap;
667 struct sil24_port_priv *pp = ap->private_data;
668 union sil24_cmd_block *cb;
669 struct sil24_prb *prb;
670 struct sil24_sge *sge;
671 u16 ctrl = 0;
672
673 cb = &pp->cmd_block[sil24_tag(qc->tag)];
674
675 switch (qc->tf.protocol) {
676 case ATA_PROT_PIO:
677 case ATA_PROT_DMA:
678 case ATA_PROT_NCQ:
679 case ATA_PROT_NODATA:
680 prb = &cb->ata.prb;
681 sge = cb->ata.sge;
682 break;
683
684 case ATA_PROT_ATAPI:
685 case ATA_PROT_ATAPI_DMA:
686 case ATA_PROT_ATAPI_NODATA:
687 prb = &cb->atapi.prb;
688 sge = cb->atapi.sge;
689 memset(cb->atapi.cdb, 0, 32);
690 memcpy(cb->atapi.cdb, qc->cdb, qc->dev->cdb_len);
691
692 if (qc->tf.protocol != ATA_PROT_ATAPI_NODATA) {
693 if (qc->tf.flags & ATA_TFLAG_WRITE)
694 ctrl = PRB_CTRL_PACKET_WRITE;
695 else
696 ctrl = PRB_CTRL_PACKET_READ;
697 }
698 break;
699
700 default:
701 prb = NULL; /* shut up, gcc */
702 sge = NULL;
703 BUG();
704 }
705
706 prb->ctrl = cpu_to_le16(ctrl);
707 ata_tf_to_fis(&qc->tf, prb->fis, 0);
708
709 if (qc->flags & ATA_QCFLAG_DMAMAP)
710 sil24_fill_sg(qc, sge);
711 }
712
713 static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc)
714 {
715 struct ata_port *ap = qc->ap;
716 struct sil24_port_priv *pp = ap->private_data;
717 void __iomem *port = ap->ioaddr.cmd_addr;
718 unsigned int tag = sil24_tag(qc->tag);
719 dma_addr_t paddr;
720 void __iomem *activate;
721
722 paddr = pp->cmd_block_dma + tag * sizeof(*pp->cmd_block);
723 activate = port + PORT_CMD_ACTIVATE + tag * 8;
724
725 writel((u32)paddr, activate);
726 writel((u64)paddr >> 32, activate + 4);
727
728 return 0;
729 }
730
731 static void sil24_irq_clear(struct ata_port *ap)
732 {
733 /* unused */
734 }
735
736 static void sil24_freeze(struct ata_port *ap)
737 {
738 void __iomem *port = ap->ioaddr.cmd_addr;
739
740 /* Port-wide IRQ mask in HOST_CTRL doesn't really work, clear
741 * PORT_IRQ_ENABLE instead.
742 */
743 writel(0xffff, port + PORT_IRQ_ENABLE_CLR);
744 }
745
746 static void sil24_thaw(struct ata_port *ap)
747 {
748 void __iomem *port = ap->ioaddr.cmd_addr;
749 u32 tmp;
750
751 /* clear IRQ */
752 tmp = readl(port + PORT_IRQ_STAT);
753 writel(tmp, port + PORT_IRQ_STAT);
754
755 /* turn IRQ back on */
756 writel(DEF_PORT_IRQ, port + PORT_IRQ_ENABLE_SET);
757 }
758
759 static void sil24_error_intr(struct ata_port *ap)
760 {
761 void __iomem *port = ap->ioaddr.cmd_addr;
762 struct ata_eh_info *ehi = &ap->eh_info;
763 int freeze = 0;
764 u32 irq_stat;
765
766 /* on error, we need to clear IRQ explicitly */
767 irq_stat = readl(port + PORT_IRQ_STAT);
768 writel(irq_stat, port + PORT_IRQ_STAT);
769
770 /* first, analyze and record host port events */
771 ata_ehi_clear_desc(ehi);
772
773 ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat);
774
775 if (irq_stat & (PORT_IRQ_PHYRDY_CHG | PORT_IRQ_DEV_XCHG)) {
776 ata_ehi_hotplugged(ehi);
777 ata_ehi_push_desc(ehi, ", %s",
778 irq_stat & PORT_IRQ_PHYRDY_CHG ?
779 "PHY RDY changed" : "device exchanged");
780 freeze = 1;
781 }
782
783 if (irq_stat & PORT_IRQ_UNK_FIS) {
784 ehi->err_mask |= AC_ERR_HSM;
785 ehi->action |= ATA_EH_SOFTRESET;
786 ata_ehi_push_desc(ehi , ", unknown FIS");
787 freeze = 1;
788 }
789
790 /* deal with command error */
791 if (irq_stat & PORT_IRQ_ERROR) {
792 struct sil24_cerr_info *ci = NULL;
793 unsigned int err_mask = 0, action = 0;
794 struct ata_queued_cmd *qc;
795 u32 cerr;
796
797 /* analyze CMD_ERR */
798 cerr = readl(port + PORT_CMD_ERR);
799 if (cerr < ARRAY_SIZE(sil24_cerr_db))
800 ci = &sil24_cerr_db[cerr];
801
802 if (ci && ci->desc) {
803 err_mask |= ci->err_mask;
804 action |= ci->action;
805 ata_ehi_push_desc(ehi, ", %s", ci->desc);
806 } else {
807 err_mask |= AC_ERR_OTHER;
808 action |= ATA_EH_SOFTRESET;
809 ata_ehi_push_desc(ehi, ", unknown command error %d",
810 cerr);
811 }
812
813 /* record error info */
814 qc = ata_qc_from_tag(ap, ap->active_tag);
815 if (qc) {
816 sil24_update_tf(ap);
817 qc->err_mask |= err_mask;
818 } else
819 ehi->err_mask |= err_mask;
820
821 ehi->action |= action;
822 }
823
824 /* freeze or abort */
825 if (freeze)
826 ata_port_freeze(ap);
827 else
828 ata_port_abort(ap);
829 }
830
831 static void sil24_finish_qc(struct ata_queued_cmd *qc)
832 {
833 if (qc->flags & ATA_QCFLAG_RESULT_TF)
834 sil24_update_tf(qc->ap);
835 }
836
837 static inline void sil24_host_intr(struct ata_port *ap)
838 {
839 void __iomem *port = ap->ioaddr.cmd_addr;
840 u32 slot_stat, qc_active;
841 int rc;
842
843 slot_stat = readl(port + PORT_SLOT_STAT);
844
845 if (unlikely(slot_stat & HOST_SSTAT_ATTN)) {
846 sil24_error_intr(ap);
847 return;
848 }
849
850 if (ap->flags & SIL24_FLAG_PCIX_IRQ_WOC)
851 writel(PORT_IRQ_COMPLETE, port + PORT_IRQ_STAT);
852
853 qc_active = slot_stat & ~HOST_SSTAT_ATTN;
854 rc = ata_qc_complete_multiple(ap, qc_active, sil24_finish_qc);
855 if (rc > 0)
856 return;
857 if (rc < 0) {
858 struct ata_eh_info *ehi = &ap->eh_info;
859 ehi->err_mask |= AC_ERR_HSM;
860 ehi->action |= ATA_EH_SOFTRESET;
861 ata_port_freeze(ap);
862 return;
863 }
864
865 if (ata_ratelimit())
866 ata_port_printk(ap, KERN_INFO, "spurious interrupt "
867 "(slot_stat 0x%x active_tag %d sactive 0x%x)\n",
868 slot_stat, ap->active_tag, ap->sactive);
869 }
870
871 static irqreturn_t sil24_interrupt(int irq, void *dev_instance)
872 {
873 struct ata_host *host = dev_instance;
874 void __iomem *host_base = host->iomap[SIL24_HOST_BAR];
875 unsigned handled = 0;
876 u32 status;
877 int i;
878
879 status = readl(host_base + HOST_IRQ_STAT);
880
881 if (status == 0xffffffff) {
882 printk(KERN_ERR DRV_NAME ": IRQ status == 0xffffffff, "
883 "PCI fault or device removal?\n");
884 goto out;
885 }
886
887 if (!(status & IRQ_STAT_4PORTS))
888 goto out;
889
890 spin_lock(&host->lock);
891
892 for (i = 0; i < host->n_ports; i++)
893 if (status & (1 << i)) {
894 struct ata_port *ap = host->ports[i];
895 if (ap && !(ap->flags & ATA_FLAG_DISABLED)) {
896 sil24_host_intr(host->ports[i]);
897 handled++;
898 } else
899 printk(KERN_ERR DRV_NAME
900 ": interrupt from disabled port %d\n", i);
901 }
902
903 spin_unlock(&host->lock);
904 out:
905 return IRQ_RETVAL(handled);
906 }
907
908 static void sil24_error_handler(struct ata_port *ap)
909 {
910 struct ata_eh_context *ehc = &ap->eh_context;
911
912 if (sil24_init_port(ap)) {
913 ata_eh_freeze_port(ap);
914 ehc->i.action |= ATA_EH_HARDRESET;
915 }
916
917 /* perform recovery */
918 ata_do_eh(ap, ata_std_prereset, sil24_softreset, sil24_hardreset,
919 ata_std_postreset);
920 }
921
922 static void sil24_post_internal_cmd(struct ata_queued_cmd *qc)
923 {
924 struct ata_port *ap = qc->ap;
925
926 if (qc->flags & ATA_QCFLAG_FAILED)
927 qc->err_mask |= AC_ERR_OTHER;
928
929 /* make DMA engine forget about the failed command */
930 if (qc->err_mask)
931 sil24_init_port(ap);
932 }
933
934 static int sil24_port_start(struct ata_port *ap)
935 {
936 struct device *dev = ap->host->dev;
937 struct sil24_port_priv *pp;
938 union sil24_cmd_block *cb;
939 size_t cb_size = sizeof(*cb) * SIL24_MAX_CMDS;
940 dma_addr_t cb_dma;
941 int rc;
942
943 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
944 if (!pp)
945 return -ENOMEM;
946
947 pp->tf.command = ATA_DRDY;
948
949 cb = dmam_alloc_coherent(dev, cb_size, &cb_dma, GFP_KERNEL);
950 if (!cb)
951 return -ENOMEM;
952 memset(cb, 0, cb_size);
953
954 rc = ata_pad_alloc(ap, dev);
955 if (rc)
956 return rc;
957
958 pp->cmd_block = cb;
959 pp->cmd_block_dma = cb_dma;
960
961 ap->private_data = pp;
962
963 return 0;
964 }
965
966 static void sil24_init_controller(struct pci_dev *pdev, int n_ports,
967 unsigned long port_flags,
968 void __iomem *host_base,
969 void __iomem *port_base)
970 {
971 u32 tmp;
972 int i;
973
974 /* GPIO off */
975 writel(0, host_base + HOST_FLASH_CMD);
976
977 /* clear global reset & mask interrupts during initialization */
978 writel(0, host_base + HOST_CTRL);
979
980 /* init ports */
981 for (i = 0; i < n_ports; i++) {
982 void __iomem *port = port_base + i * PORT_REGS_SIZE;
983
984 /* Initial PHY setting */
985 writel(0x20c, port + PORT_PHY_CFG);
986
987 /* Clear port RST */
988 tmp = readl(port + PORT_CTRL_STAT);
989 if (tmp & PORT_CS_PORT_RST) {
990 writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR);
991 tmp = ata_wait_register(port + PORT_CTRL_STAT,
992 PORT_CS_PORT_RST,
993 PORT_CS_PORT_RST, 10, 100);
994 if (tmp & PORT_CS_PORT_RST)
995 dev_printk(KERN_ERR, &pdev->dev,
996 "failed to clear port RST\n");
997 }
998
999 /* Configure IRQ WoC */
1000 if (port_flags & SIL24_FLAG_PCIX_IRQ_WOC)
1001 writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_STAT);
1002 else
1003 writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_CLR);
1004
1005 /* Zero error counters. */
1006 writel(0x8000, port + PORT_DECODE_ERR_THRESH);
1007 writel(0x8000, port + PORT_CRC_ERR_THRESH);
1008 writel(0x8000, port + PORT_HSHK_ERR_THRESH);
1009 writel(0x0000, port + PORT_DECODE_ERR_CNT);
1010 writel(0x0000, port + PORT_CRC_ERR_CNT);
1011 writel(0x0000, port + PORT_HSHK_ERR_CNT);
1012
1013 /* Always use 64bit activation */
1014 writel(PORT_CS_32BIT_ACTV, port + PORT_CTRL_CLR);
1015
1016 /* Clear port multiplier enable and resume bits */
1017 writel(PORT_CS_PMP_EN | PORT_CS_PMP_RESUME,
1018 port + PORT_CTRL_CLR);
1019 }
1020
1021 /* Turn on interrupts */
1022 writel(IRQ_STAT_4PORTS, host_base + HOST_CTRL);
1023 }
1024
1025 static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1026 {
1027 static int printed_version = 0;
1028 struct device *dev = &pdev->dev;
1029 unsigned int board_id = (unsigned int)ent->driver_data;
1030 struct ata_port_info *pinfo = &sil24_port_info[board_id];
1031 struct ata_probe_ent *probe_ent;
1032 void __iomem *host_base;
1033 void __iomem *port_base;
1034 int i, rc;
1035 u32 tmp;
1036
1037 if (!printed_version++)
1038 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
1039
1040 rc = pcim_enable_device(pdev);
1041 if (rc)
1042 return rc;
1043
1044 rc = pcim_iomap_regions(pdev,
1045 (1 << SIL24_HOST_BAR) | (1 << SIL24_PORT_BAR),
1046 DRV_NAME);
1047 if (rc)
1048 return rc;
1049
1050 /* allocate & init probe_ent */
1051 probe_ent = devm_kzalloc(dev, sizeof(*probe_ent), GFP_KERNEL);
1052 if (!probe_ent)
1053 return -ENOMEM;
1054
1055 probe_ent->dev = pci_dev_to_dev(pdev);
1056 INIT_LIST_HEAD(&probe_ent->node);
1057
1058 probe_ent->sht = pinfo->sht;
1059 probe_ent->port_flags = pinfo->flags;
1060 probe_ent->pio_mask = pinfo->pio_mask;
1061 probe_ent->mwdma_mask = pinfo->mwdma_mask;
1062 probe_ent->udma_mask = pinfo->udma_mask;
1063 probe_ent->port_ops = pinfo->port_ops;
1064 probe_ent->n_ports = SIL24_FLAG2NPORTS(pinfo->flags);
1065
1066 probe_ent->irq = pdev->irq;
1067 probe_ent->irq_flags = IRQF_SHARED;
1068 probe_ent->iomap = pcim_iomap_table(pdev);
1069
1070 host_base = probe_ent->iomap[SIL24_HOST_BAR];
1071 port_base = probe_ent->iomap[SIL24_PORT_BAR];
1072
1073 /*
1074 * Configure the device
1075 */
1076 if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
1077 rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
1078 if (rc) {
1079 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1080 if (rc) {
1081 dev_printk(KERN_ERR, &pdev->dev,
1082 "64-bit DMA enable failed\n");
1083 return rc;
1084 }
1085 }
1086 } else {
1087 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1088 if (rc) {
1089 dev_printk(KERN_ERR, &pdev->dev,
1090 "32-bit DMA enable failed\n");
1091 return rc;
1092 }
1093 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1094 if (rc) {
1095 dev_printk(KERN_ERR, &pdev->dev,
1096 "32-bit consistent DMA enable failed\n");
1097 return rc;
1098 }
1099 }
1100
1101 /* Apply workaround for completion IRQ loss on PCI-X errata */
1102 if (probe_ent->port_flags & SIL24_FLAG_PCIX_IRQ_WOC) {
1103 tmp = readl(host_base + HOST_CTRL);
1104 if (tmp & (HOST_CTRL_TRDY | HOST_CTRL_STOP | HOST_CTRL_DEVSEL))
1105 dev_printk(KERN_INFO, &pdev->dev,
1106 "Applying completion IRQ loss on PCI-X "
1107 "errata fix\n");
1108 else
1109 probe_ent->port_flags &= ~SIL24_FLAG_PCIX_IRQ_WOC;
1110 }
1111
1112 for (i = 0; i < probe_ent->n_ports; i++) {
1113 void __iomem *port = port_base + i * PORT_REGS_SIZE;
1114
1115 probe_ent->port[i].cmd_addr = port;
1116 probe_ent->port[i].scr_addr = port + PORT_SCONTROL;
1117
1118 ata_std_ports(&probe_ent->port[i]);
1119 }
1120
1121 sil24_init_controller(pdev, probe_ent->n_ports, probe_ent->port_flags,
1122 host_base, port_base);
1123
1124 pci_set_master(pdev);
1125
1126 if (!ata_device_add(probe_ent))
1127 return -ENODEV;
1128
1129 devm_kfree(dev, probe_ent);
1130 return 0;
1131 }
1132
1133 #ifdef CONFIG_PM
1134 static int sil24_pci_device_resume(struct pci_dev *pdev)
1135 {
1136 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1137 void __iomem *host_base = host->iomap[SIL24_HOST_BAR];
1138 void __iomem *port_base = host->iomap[SIL24_PORT_BAR];
1139 int rc;
1140
1141 rc = ata_pci_device_do_resume(pdev);
1142 if (rc)
1143 return rc;
1144
1145 if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND)
1146 writel(HOST_CTRL_GLOBAL_RST, host_base + HOST_CTRL);
1147
1148 sil24_init_controller(pdev, host->n_ports, host->ports[0]->flags,
1149 host_base, port_base);
1150
1151 ata_host_resume(host);
1152
1153 return 0;
1154 }
1155 #endif
1156
1157 static int __init sil24_init(void)
1158 {
1159 return pci_register_driver(&sil24_pci_driver);
1160 }
1161
1162 static void __exit sil24_exit(void)
1163 {
1164 pci_unregister_driver(&sil24_pci_driver);
1165 }
1166
1167 MODULE_AUTHOR("Tejun Heo");
1168 MODULE_DESCRIPTION("Silicon Image 3124/3132 SATA low-level driver");
1169 MODULE_LICENSE("GPL");
1170 MODULE_DEVICE_TABLE(pci, sil24_pci_tbl);
1171
1172 module_init(sil24_init);
1173 module_exit(sil24_exit);
Support for the Chinese Samsung S3C2440 based development boards