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59bd9ded | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1fd7a697 TH |
2 | /* |
3 | * sata_inic162x.c - Driver for Initio 162x SATA controllers | |
4 | * | |
5 | * Copyright 2006 SUSE Linux Products GmbH | |
6 | * Copyright 2006 Tejun Heo <teheo@novell.com> | |
7 | * | |
bb969619 TH |
8 | * **** WARNING **** |
9 | * | |
10 | * This driver never worked properly and unfortunately data corruption is | |
11 | * relatively common. There isn't anyone working on the driver and there's | |
12 | * no support from the vendor. Do not use this driver in any production | |
13 | * environment. | |
14 | * | |
15 | * http://thread.gmane.org/gmane.linux.debian.devel.bugs.rc/378525/focus=54491 | |
16 | * https://bugzilla.kernel.org/show_bug.cgi?id=60565 | |
17 | * | |
18 | * ***************** | |
19 | * | |
1fd7a697 TH |
20 | * This controller is eccentric and easily locks up if something isn't |
21 | * right. Documentation is available at initio's website but it only | |
22 | * documents registers (not programming model). | |
23 | * | |
22bfc6d5 TH |
24 | * This driver has interesting history. The first version was written |
25 | * from the documentation and a 2.4 IDE driver posted on a Taiwan | |
26 | * company, which didn't use any IDMA features and couldn't handle | |
27 | * LBA48. The resulting driver couldn't handle LBA48 devices either | |
28 | * making it pretty useless. | |
29 | * | |
30 | * After a while, initio picked the driver up, renamed it to | |
31 | * sata_initio162x, updated it to use IDMA for ATA DMA commands and | |
32 | * posted it on their website. It only used ATA_PROT_DMA for IDMA and | |
33 | * attaching both devices and issuing IDMA and !IDMA commands | |
34 | * simultaneously broke it due to PIRQ masking interaction but it did | |
35 | * show how to use the IDMA (ADMA + some initio specific twists) | |
36 | * engine. | |
37 | * | |
38 | * Then, I picked up their changes again and here's the usable driver | |
39 | * which uses IDMA for everything. Everything works now including | |
40 | * LBA48, CD/DVD burning, suspend/resume and hotplug. There are some | |
41 | * issues tho. Result Tf is not resported properly, NCQ isn't | |
42 | * supported yet and CD/DVD writing works with DMA assisted PIO | |
43 | * protocol (which, for native SATA devices, shouldn't cause any | |
44 | * noticeable difference). | |
45 | * | |
46 | * Anyways, so, here's finally a working driver for inic162x. Enjoy! | |
47 | * | |
48 | * initio: If you guys wanna improve the driver regarding result TF | |
49 | * access and other stuff, please feel free to contact me. I'll be | |
50 | * happy to assist. | |
1fd7a697 TH |
51 | */ |
52 | ||
5a0e3ad6 | 53 | #include <linux/gfp.h> |
1fd7a697 TH |
54 | #include <linux/kernel.h> |
55 | #include <linux/module.h> | |
56 | #include <linux/pci.h> | |
57 | #include <scsi/scsi_host.h> | |
58 | #include <linux/libata.h> | |
59 | #include <linux/blkdev.h> | |
60 | #include <scsi/scsi_device.h> | |
61 | ||
62 | #define DRV_NAME "sata_inic162x" | |
22bfc6d5 | 63 | #define DRV_VERSION "0.4" |
1fd7a697 TH |
64 | |
65 | enum { | |
ba66b242 TH |
66 | MMIO_BAR_PCI = 5, |
67 | MMIO_BAR_CARDBUS = 1, | |
1fd7a697 TH |
68 | |
69 | NR_PORTS = 2, | |
70 | ||
3ad400a9 TH |
71 | IDMA_CPB_TBL_SIZE = 4 * 32, |
72 | ||
73 | INIC_DMA_BOUNDARY = 0xffffff, | |
74 | ||
b0dd9b8e | 75 | HOST_ACTRL = 0x08, |
1fd7a697 TH |
76 | HOST_CTL = 0x7c, |
77 | HOST_STAT = 0x7e, | |
78 | HOST_IRQ_STAT = 0xbc, | |
79 | HOST_IRQ_MASK = 0xbe, | |
80 | ||
81 | PORT_SIZE = 0x40, | |
82 | ||
83 | /* registers for ATA TF operation */ | |
b0dd9b8e TH |
84 | PORT_TF_DATA = 0x00, |
85 | PORT_TF_FEATURE = 0x01, | |
86 | PORT_TF_NSECT = 0x02, | |
87 | PORT_TF_LBAL = 0x03, | |
88 | PORT_TF_LBAM = 0x04, | |
89 | PORT_TF_LBAH = 0x05, | |
90 | PORT_TF_DEVICE = 0x06, | |
91 | PORT_TF_COMMAND = 0x07, | |
92 | PORT_TF_ALT_STAT = 0x08, | |
1fd7a697 TH |
93 | PORT_IRQ_STAT = 0x09, |
94 | PORT_IRQ_MASK = 0x0a, | |
95 | PORT_PRD_CTL = 0x0b, | |
96 | PORT_PRD_ADDR = 0x0c, | |
97 | PORT_PRD_XFERLEN = 0x10, | |
b0dd9b8e TH |
98 | PORT_CPB_CPBLAR = 0x18, |
99 | PORT_CPB_PTQFIFO = 0x1c, | |
1fd7a697 TH |
100 | |
101 | /* IDMA register */ | |
102 | PORT_IDMA_CTL = 0x14, | |
b0dd9b8e TH |
103 | PORT_IDMA_STAT = 0x16, |
104 | ||
105 | PORT_RPQ_FIFO = 0x1e, | |
106 | PORT_RPQ_CNT = 0x1f, | |
1fd7a697 TH |
107 | |
108 | PORT_SCR = 0x20, | |
109 | ||
110 | /* HOST_CTL bits */ | |
99580664 | 111 | HCTL_LEDEN = (1 << 3), /* enable LED operation */ |
1fd7a697 | 112 | HCTL_IRQOFF = (1 << 8), /* global IRQ off */ |
b0dd9b8e TH |
113 | HCTL_FTHD0 = (1 << 10), /* fifo threshold 0 */ |
114 | HCTL_FTHD1 = (1 << 11), /* fifo threshold 1*/ | |
115 | HCTL_PWRDWN = (1 << 12), /* power down PHYs */ | |
1fd7a697 TH |
116 | HCTL_SOFTRST = (1 << 13), /* global reset (no phy reset) */ |
117 | HCTL_RPGSEL = (1 << 15), /* register page select */ | |
118 | ||
119 | HCTL_KNOWN_BITS = HCTL_IRQOFF | HCTL_PWRDWN | HCTL_SOFTRST | | |
120 | HCTL_RPGSEL, | |
121 | ||
122 | /* HOST_IRQ_(STAT|MASK) bits */ | |
123 | HIRQ_PORT0 = (1 << 0), | |
124 | HIRQ_PORT1 = (1 << 1), | |
125 | HIRQ_SOFT = (1 << 14), | |
126 | HIRQ_GLOBAL = (1 << 15), /* STAT only */ | |
127 | ||
128 | /* PORT_IRQ_(STAT|MASK) bits */ | |
129 | PIRQ_OFFLINE = (1 << 0), /* device unplugged */ | |
130 | PIRQ_ONLINE = (1 << 1), /* device plugged */ | |
131 | PIRQ_COMPLETE = (1 << 2), /* completion interrupt */ | |
132 | PIRQ_FATAL = (1 << 3), /* fatal error */ | |
133 | PIRQ_ATA = (1 << 4), /* ATA interrupt */ | |
134 | PIRQ_REPLY = (1 << 5), /* reply FIFO not empty */ | |
135 | PIRQ_PENDING = (1 << 7), /* port IRQ pending (STAT only) */ | |
136 | ||
137 | PIRQ_ERR = PIRQ_OFFLINE | PIRQ_ONLINE | PIRQ_FATAL, | |
f8b0685a | 138 | PIRQ_MASK_DEFAULT = PIRQ_REPLY | PIRQ_ATA, |
1fd7a697 TH |
139 | PIRQ_MASK_FREEZE = 0xff, |
140 | ||
141 | /* PORT_PRD_CTL bits */ | |
142 | PRD_CTL_START = (1 << 0), | |
143 | PRD_CTL_WR = (1 << 3), | |
144 | PRD_CTL_DMAEN = (1 << 7), /* DMA enable */ | |
145 | ||
146 | /* PORT_IDMA_CTL bits */ | |
147 | IDMA_CTL_RST_ATA = (1 << 2), /* hardreset ATA bus */ | |
148 | IDMA_CTL_RST_IDMA = (1 << 5), /* reset IDMA machinary */ | |
149 | IDMA_CTL_GO = (1 << 7), /* IDMA mode go */ | |
150 | IDMA_CTL_ATA_NIEN = (1 << 8), /* ATA IRQ disable */ | |
b0dd9b8e TH |
151 | |
152 | /* PORT_IDMA_STAT bits */ | |
153 | IDMA_STAT_PERR = (1 << 0), /* PCI ERROR MODE */ | |
154 | IDMA_STAT_CPBERR = (1 << 1), /* ADMA CPB error */ | |
155 | IDMA_STAT_LGCY = (1 << 3), /* ADMA legacy */ | |
156 | IDMA_STAT_UIRQ = (1 << 4), /* ADMA unsolicited irq */ | |
157 | IDMA_STAT_STPD = (1 << 5), /* ADMA stopped */ | |
158 | IDMA_STAT_PSD = (1 << 6), /* ADMA pause */ | |
159 | IDMA_STAT_DONE = (1 << 7), /* ADMA done */ | |
160 | ||
161 | IDMA_STAT_ERR = IDMA_STAT_PERR | IDMA_STAT_CPBERR, | |
162 | ||
163 | /* CPB Control Flags*/ | |
164 | CPB_CTL_VALID = (1 << 0), /* CPB valid */ | |
165 | CPB_CTL_QUEUED = (1 << 1), /* queued command */ | |
166 | CPB_CTL_DATA = (1 << 2), /* data, rsvd in datasheet */ | |
167 | CPB_CTL_IEN = (1 << 3), /* PCI interrupt enable */ | |
168 | CPB_CTL_DEVDIR = (1 << 4), /* device direction control */ | |
169 | ||
170 | /* CPB Response Flags */ | |
171 | CPB_RESP_DONE = (1 << 0), /* ATA command complete */ | |
172 | CPB_RESP_REL = (1 << 1), /* ATA release */ | |
173 | CPB_RESP_IGNORED = (1 << 2), /* CPB ignored */ | |
174 | CPB_RESP_ATA_ERR = (1 << 3), /* ATA command error */ | |
175 | CPB_RESP_SPURIOUS = (1 << 4), /* ATA spurious interrupt error */ | |
176 | CPB_RESP_UNDERFLOW = (1 << 5), /* APRD deficiency length error */ | |
177 | CPB_RESP_OVERFLOW = (1 << 6), /* APRD exccess length error */ | |
178 | CPB_RESP_CPB_ERR = (1 << 7), /* CPB error flag */ | |
179 | ||
180 | /* PRD Control Flags */ | |
181 | PRD_DRAIN = (1 << 1), /* ignore data excess */ | |
182 | PRD_CDB = (1 << 2), /* atapi packet command pointer */ | |
183 | PRD_DIRECT_INTR = (1 << 3), /* direct interrupt */ | |
184 | PRD_DMA = (1 << 4), /* data transfer method */ | |
185 | PRD_WRITE = (1 << 5), /* data dir, rsvd in datasheet */ | |
186 | PRD_IOM = (1 << 6), /* io/memory transfer */ | |
187 | PRD_END = (1 << 7), /* APRD chain end */ | |
1fd7a697 TH |
188 | }; |
189 | ||
3ad400a9 TH |
190 | /* Comman Parameter Block */ |
191 | struct inic_cpb { | |
192 | u8 resp_flags; /* Response Flags */ | |
193 | u8 error; /* ATA Error */ | |
194 | u8 status; /* ATA Status */ | |
195 | u8 ctl_flags; /* Control Flags */ | |
196 | __le32 len; /* Total Transfer Length */ | |
197 | __le32 prd; /* First PRD pointer */ | |
198 | u8 rsvd[4]; | |
199 | /* 16 bytes */ | |
200 | u8 feature; /* ATA Feature */ | |
201 | u8 hob_feature; /* ATA Ex. Feature */ | |
202 | u8 device; /* ATA Device/Head */ | |
203 | u8 mirctl; /* Mirror Control */ | |
204 | u8 nsect; /* ATA Sector Count */ | |
205 | u8 hob_nsect; /* ATA Ex. Sector Count */ | |
206 | u8 lbal; /* ATA Sector Number */ | |
207 | u8 hob_lbal; /* ATA Ex. Sector Number */ | |
208 | u8 lbam; /* ATA Cylinder Low */ | |
209 | u8 hob_lbam; /* ATA Ex. Cylinder Low */ | |
210 | u8 lbah; /* ATA Cylinder High */ | |
211 | u8 hob_lbah; /* ATA Ex. Cylinder High */ | |
212 | u8 command; /* ATA Command */ | |
213 | u8 ctl; /* ATA Control */ | |
214 | u8 slave_error; /* Slave ATA Error */ | |
215 | u8 slave_status; /* Slave ATA Status */ | |
216 | /* 32 bytes */ | |
217 | } __packed; | |
218 | ||
219 | /* Physical Region Descriptor */ | |
220 | struct inic_prd { | |
221 | __le32 mad; /* Physical Memory Address */ | |
222 | __le16 len; /* Transfer Length */ | |
223 | u8 rsvd; | |
224 | u8 flags; /* Control Flags */ | |
225 | } __packed; | |
226 | ||
227 | struct inic_pkt { | |
228 | struct inic_cpb cpb; | |
b3f677e5 TH |
229 | struct inic_prd prd[LIBATA_MAX_PRD + 1]; /* + 1 for cdb */ |
230 | u8 cdb[ATAPI_CDB_LEN]; | |
3ad400a9 TH |
231 | } __packed; |
232 | ||
1fd7a697 | 233 | struct inic_host_priv { |
ba66b242 | 234 | void __iomem *mmio_base; |
36f674d9 | 235 | u16 cached_hctl; |
1fd7a697 TH |
236 | }; |
237 | ||
238 | struct inic_port_priv { | |
3ad400a9 TH |
239 | struct inic_pkt *pkt; |
240 | dma_addr_t pkt_dma; | |
241 | u32 *cpb_tbl; | |
242 | dma_addr_t cpb_tbl_dma; | |
1fd7a697 TH |
243 | }; |
244 | ||
1fd7a697 | 245 | static struct scsi_host_template inic_sht = { |
ab5b0235 | 246 | ATA_BASE_SHT(DRV_NAME), |
a8cf59a6 CH |
247 | .sg_tablesize = LIBATA_MAX_PRD, /* maybe it can be larger? */ |
248 | ||
249 | /* | |
250 | * This controller is braindamaged. dma_boundary is 0xffff like others | |
251 | * but it will lock up the whole machine HARD if 65536 byte PRD entry | |
252 | * is fed. Reduce maximum segment size. | |
253 | */ | |
254 | .dma_boundary = INIC_DMA_BOUNDARY, | |
255 | .max_segment_size = 65536 - 512, | |
1fd7a697 TH |
256 | }; |
257 | ||
258 | static const int scr_map[] = { | |
259 | [SCR_STATUS] = 0, | |
260 | [SCR_ERROR] = 1, | |
261 | [SCR_CONTROL] = 2, | |
262 | }; | |
263 | ||
5796d1c4 | 264 | static void __iomem *inic_port_base(struct ata_port *ap) |
1fd7a697 | 265 | { |
ba66b242 TH |
266 | struct inic_host_priv *hpriv = ap->host->private_data; |
267 | ||
268 | return hpriv->mmio_base + ap->port_no * PORT_SIZE; | |
1fd7a697 TH |
269 | } |
270 | ||
1fd7a697 TH |
271 | static void inic_reset_port(void __iomem *port_base) |
272 | { | |
273 | void __iomem *idma_ctl = port_base + PORT_IDMA_CTL; | |
1fd7a697 | 274 | |
f8b0685a TH |
275 | /* stop IDMA engine */ |
276 | readw(idma_ctl); /* flush */ | |
277 | msleep(1); | |
1fd7a697 TH |
278 | |
279 | /* mask IRQ and assert reset */ | |
f8b0685a | 280 | writew(IDMA_CTL_RST_IDMA, idma_ctl); |
1fd7a697 | 281 | readw(idma_ctl); /* flush */ |
1fd7a697 TH |
282 | msleep(1); |
283 | ||
284 | /* release reset */ | |
f8b0685a | 285 | writew(0, idma_ctl); |
1fd7a697 TH |
286 | |
287 | /* clear irq */ | |
288 | writeb(0xff, port_base + PORT_IRQ_STAT); | |
1fd7a697 TH |
289 | } |
290 | ||
82ef04fb | 291 | static int inic_scr_read(struct ata_link *link, unsigned sc_reg, u32 *val) |
1fd7a697 | 292 | { |
82ef04fb | 293 | void __iomem *scr_addr = inic_port_base(link->ap) + PORT_SCR; |
1fd7a697 TH |
294 | |
295 | if (unlikely(sc_reg >= ARRAY_SIZE(scr_map))) | |
da3dbb17 | 296 | return -EINVAL; |
1fd7a697 | 297 | |
da3dbb17 | 298 | *val = readl(scr_addr + scr_map[sc_reg] * 4); |
1fd7a697 TH |
299 | |
300 | /* this controller has stuck DIAG.N, ignore it */ | |
301 | if (sc_reg == SCR_ERROR) | |
da3dbb17 TH |
302 | *val &= ~SERR_PHYRDY_CHG; |
303 | return 0; | |
1fd7a697 TH |
304 | } |
305 | ||
82ef04fb | 306 | static int inic_scr_write(struct ata_link *link, unsigned sc_reg, u32 val) |
1fd7a697 | 307 | { |
82ef04fb | 308 | void __iomem *scr_addr = inic_port_base(link->ap) + PORT_SCR; |
1fd7a697 TH |
309 | |
310 | if (unlikely(sc_reg >= ARRAY_SIZE(scr_map))) | |
da3dbb17 | 311 | return -EINVAL; |
1fd7a697 | 312 | |
1fd7a697 | 313 | writel(val, scr_addr + scr_map[sc_reg] * 4); |
da3dbb17 | 314 | return 0; |
1fd7a697 TH |
315 | } |
316 | ||
3ad400a9 | 317 | static void inic_stop_idma(struct ata_port *ap) |
1fd7a697 TH |
318 | { |
319 | void __iomem *port_base = inic_port_base(ap); | |
3ad400a9 TH |
320 | |
321 | readb(port_base + PORT_RPQ_FIFO); | |
322 | readb(port_base + PORT_RPQ_CNT); | |
323 | writew(0, port_base + PORT_IDMA_CTL); | |
324 | } | |
325 | ||
326 | static void inic_host_err_intr(struct ata_port *ap, u8 irq_stat, u16 idma_stat) | |
327 | { | |
9af5c9c9 | 328 | struct ata_eh_info *ehi = &ap->link.eh_info; |
3ad400a9 TH |
329 | struct inic_port_priv *pp = ap->private_data; |
330 | struct inic_cpb *cpb = &pp->pkt->cpb; | |
331 | bool freeze = false; | |
332 | ||
333 | ata_ehi_clear_desc(ehi); | |
334 | ata_ehi_push_desc(ehi, "irq_stat=0x%x idma_stat=0x%x", | |
335 | irq_stat, idma_stat); | |
336 | ||
337 | inic_stop_idma(ap); | |
338 | ||
339 | if (irq_stat & (PIRQ_OFFLINE | PIRQ_ONLINE)) { | |
340 | ata_ehi_push_desc(ehi, "hotplug"); | |
341 | ata_ehi_hotplugged(ehi); | |
342 | freeze = true; | |
343 | } | |
344 | ||
345 | if (idma_stat & IDMA_STAT_PERR) { | |
346 | ata_ehi_push_desc(ehi, "PCI error"); | |
347 | freeze = true; | |
348 | } | |
349 | ||
350 | if (idma_stat & IDMA_STAT_CPBERR) { | |
351 | ata_ehi_push_desc(ehi, "CPB error"); | |
352 | ||
353 | if (cpb->resp_flags & CPB_RESP_IGNORED) { | |
354 | __ata_ehi_push_desc(ehi, " ignored"); | |
355 | ehi->err_mask |= AC_ERR_INVALID; | |
356 | freeze = true; | |
357 | } | |
358 | ||
359 | if (cpb->resp_flags & CPB_RESP_ATA_ERR) | |
360 | ehi->err_mask |= AC_ERR_DEV; | |
361 | ||
362 | if (cpb->resp_flags & CPB_RESP_SPURIOUS) { | |
363 | __ata_ehi_push_desc(ehi, " spurious-intr"); | |
364 | ehi->err_mask |= AC_ERR_HSM; | |
365 | freeze = true; | |
366 | } | |
367 | ||
368 | if (cpb->resp_flags & | |
369 | (CPB_RESP_UNDERFLOW | CPB_RESP_OVERFLOW)) { | |
370 | __ata_ehi_push_desc(ehi, " data-over/underflow"); | |
371 | ehi->err_mask |= AC_ERR_HSM; | |
372 | freeze = true; | |
373 | } | |
374 | } | |
375 | ||
376 | if (freeze) | |
377 | ata_port_freeze(ap); | |
378 | else | |
379 | ata_port_abort(ap); | |
380 | } | |
381 | ||
382 | static void inic_host_intr(struct ata_port *ap) | |
383 | { | |
384 | void __iomem *port_base = inic_port_base(ap); | |
385 | struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->link.active_tag); | |
1fd7a697 | 386 | u8 irq_stat; |
3ad400a9 | 387 | u16 idma_stat; |
1fd7a697 | 388 | |
3ad400a9 | 389 | /* read and clear IRQ status */ |
1fd7a697 TH |
390 | irq_stat = readb(port_base + PORT_IRQ_STAT); |
391 | writeb(irq_stat, port_base + PORT_IRQ_STAT); | |
3ad400a9 TH |
392 | idma_stat = readw(port_base + PORT_IDMA_STAT); |
393 | ||
394 | if (unlikely((irq_stat & PIRQ_ERR) || (idma_stat & IDMA_STAT_ERR))) | |
395 | inic_host_err_intr(ap, irq_stat, idma_stat); | |
396 | ||
f8b0685a | 397 | if (unlikely(!qc)) |
3ad400a9 | 398 | goto spurious; |
3ad400a9 | 399 | |
b3f677e5 TH |
400 | if (likely(idma_stat & IDMA_STAT_DONE)) { |
401 | inic_stop_idma(ap); | |
1fd7a697 | 402 | |
b3f677e5 TH |
403 | /* Depending on circumstances, device error |
404 | * isn't reported by IDMA, check it explicitly. | |
405 | */ | |
406 | if (unlikely(readb(port_base + PORT_TF_COMMAND) & | |
407 | (ATA_DF | ATA_ERR))) | |
408 | qc->err_mask |= AC_ERR_DEV; | |
1fd7a697 | 409 | |
b3f677e5 TH |
410 | ata_qc_complete(qc); |
411 | return; | |
1fd7a697 TH |
412 | } |
413 | ||
3ad400a9 | 414 | spurious: |
a9a79dfe JP |
415 | ata_port_warn(ap, "unhandled interrupt: cmd=0x%x irq_stat=0x%x idma_stat=0x%x\n", |
416 | qc ? qc->tf.command : 0xff, irq_stat, idma_stat); | |
1fd7a697 TH |
417 | } |
418 | ||
419 | static irqreturn_t inic_interrupt(int irq, void *dev_instance) | |
420 | { | |
421 | struct ata_host *host = dev_instance; | |
ba66b242 | 422 | struct inic_host_priv *hpriv = host->private_data; |
1fd7a697 | 423 | u16 host_irq_stat; |
87c8b22b | 424 | int i, handled = 0; |
1fd7a697 | 425 | |
ba66b242 | 426 | host_irq_stat = readw(hpriv->mmio_base + HOST_IRQ_STAT); |
1fd7a697 TH |
427 | |
428 | if (unlikely(!(host_irq_stat & HIRQ_GLOBAL))) | |
429 | goto out; | |
430 | ||
431 | spin_lock(&host->lock); | |
432 | ||
3e4ec344 TH |
433 | for (i = 0; i < NR_PORTS; i++) |
434 | if (host_irq_stat & (HIRQ_PORT0 << i)) { | |
435 | inic_host_intr(host->ports[i]); | |
1fd7a697 | 436 | handled++; |
1fd7a697 | 437 | } |
1fd7a697 TH |
438 | |
439 | spin_unlock(&host->lock); | |
440 | ||
441 | out: | |
442 | return IRQ_RETVAL(handled); | |
443 | } | |
444 | ||
b3f677e5 TH |
445 | static int inic_check_atapi_dma(struct ata_queued_cmd *qc) |
446 | { | |
447 | /* For some reason ATAPI_PROT_DMA doesn't work for some | |
448 | * commands including writes and other misc ops. Use PIO | |
449 | * protocol instead, which BTW is driven by the DMA engine | |
450 | * anyway, so it shouldn't make much difference for native | |
451 | * SATA devices. | |
452 | */ | |
453 | if (atapi_cmd_type(qc->cdb[0]) == READ) | |
454 | return 0; | |
455 | return 1; | |
456 | } | |
457 | ||
3ad400a9 TH |
458 | static void inic_fill_sg(struct inic_prd *prd, struct ata_queued_cmd *qc) |
459 | { | |
460 | struct scatterlist *sg; | |
461 | unsigned int si; | |
049e8e04 | 462 | u8 flags = 0; |
3ad400a9 TH |
463 | |
464 | if (qc->tf.flags & ATA_TFLAG_WRITE) | |
465 | flags |= PRD_WRITE; | |
466 | ||
049e8e04 TH |
467 | if (ata_is_dma(qc->tf.protocol)) |
468 | flags |= PRD_DMA; | |
469 | ||
3ad400a9 TH |
470 | for_each_sg(qc->sg, sg, qc->n_elem, si) { |
471 | prd->mad = cpu_to_le32(sg_dma_address(sg)); | |
472 | prd->len = cpu_to_le16(sg_dma_len(sg)); | |
473 | prd->flags = flags; | |
474 | prd++; | |
475 | } | |
476 | ||
477 | WARN_ON(!si); | |
478 | prd[-1].flags |= PRD_END; | |
479 | } | |
480 | ||
481 | static void inic_qc_prep(struct ata_queued_cmd *qc) | |
482 | { | |
483 | struct inic_port_priv *pp = qc->ap->private_data; | |
484 | struct inic_pkt *pkt = pp->pkt; | |
485 | struct inic_cpb *cpb = &pkt->cpb; | |
486 | struct inic_prd *prd = pkt->prd; | |
049e8e04 TH |
487 | bool is_atapi = ata_is_atapi(qc->tf.protocol); |
488 | bool is_data = ata_is_data(qc->tf.protocol); | |
b3f677e5 | 489 | unsigned int cdb_len = 0; |
3ad400a9 TH |
490 | |
491 | VPRINTK("ENTER\n"); | |
492 | ||
049e8e04 | 493 | if (is_atapi) |
b3f677e5 | 494 | cdb_len = qc->dev->cdb_len; |
3ad400a9 TH |
495 | |
496 | /* prepare packet, based on initio driver */ | |
497 | memset(pkt, 0, sizeof(struct inic_pkt)); | |
498 | ||
049e8e04 | 499 | cpb->ctl_flags = CPB_CTL_VALID | CPB_CTL_IEN; |
b3f677e5 | 500 | if (is_atapi || is_data) |
049e8e04 | 501 | cpb->ctl_flags |= CPB_CTL_DATA; |
3ad400a9 | 502 | |
b3f677e5 | 503 | cpb->len = cpu_to_le32(qc->nbytes + cdb_len); |
3ad400a9 TH |
504 | cpb->prd = cpu_to_le32(pp->pkt_dma + offsetof(struct inic_pkt, prd)); |
505 | ||
506 | cpb->device = qc->tf.device; | |
507 | cpb->feature = qc->tf.feature; | |
508 | cpb->nsect = qc->tf.nsect; | |
509 | cpb->lbal = qc->tf.lbal; | |
510 | cpb->lbam = qc->tf.lbam; | |
511 | cpb->lbah = qc->tf.lbah; | |
512 | ||
513 | if (qc->tf.flags & ATA_TFLAG_LBA48) { | |
514 | cpb->hob_feature = qc->tf.hob_feature; | |
515 | cpb->hob_nsect = qc->tf.hob_nsect; | |
516 | cpb->hob_lbal = qc->tf.hob_lbal; | |
517 | cpb->hob_lbam = qc->tf.hob_lbam; | |
518 | cpb->hob_lbah = qc->tf.hob_lbah; | |
519 | } | |
520 | ||
521 | cpb->command = qc->tf.command; | |
522 | /* don't load ctl - dunno why. it's like that in the initio driver */ | |
523 | ||
b3f677e5 TH |
524 | /* setup PRD for CDB */ |
525 | if (is_atapi) { | |
526 | memcpy(pkt->cdb, qc->cdb, ATAPI_CDB_LEN); | |
527 | prd->mad = cpu_to_le32(pp->pkt_dma + | |
528 | offsetof(struct inic_pkt, cdb)); | |
529 | prd->len = cpu_to_le16(cdb_len); | |
530 | prd->flags = PRD_CDB | PRD_WRITE; | |
531 | if (!is_data) | |
532 | prd->flags |= PRD_END; | |
533 | prd++; | |
534 | } | |
535 | ||
3ad400a9 | 536 | /* setup sg table */ |
049e8e04 TH |
537 | if (is_data) |
538 | inic_fill_sg(prd, qc); | |
3ad400a9 TH |
539 | |
540 | pp->cpb_tbl[0] = pp->pkt_dma; | |
541 | } | |
542 | ||
1fd7a697 TH |
543 | static unsigned int inic_qc_issue(struct ata_queued_cmd *qc) |
544 | { | |
545 | struct ata_port *ap = qc->ap; | |
3ad400a9 | 546 | void __iomem *port_base = inic_port_base(ap); |
1fd7a697 | 547 | |
b3f677e5 | 548 | /* fire up the ADMA engine */ |
99580664 | 549 | writew(HCTL_FTHD0 | HCTL_LEDEN, port_base + HOST_CTL); |
b3f677e5 TH |
550 | writew(IDMA_CTL_GO, port_base + PORT_IDMA_CTL); |
551 | writeb(0, port_base + PORT_CPB_PTQFIFO); | |
1fd7a697 | 552 | |
b3f677e5 | 553 | return 0; |
1fd7a697 TH |
554 | } |
555 | ||
364fac0e TH |
556 | static void inic_tf_read(struct ata_port *ap, struct ata_taskfile *tf) |
557 | { | |
558 | void __iomem *port_base = inic_port_base(ap); | |
559 | ||
560 | tf->feature = readb(port_base + PORT_TF_FEATURE); | |
561 | tf->nsect = readb(port_base + PORT_TF_NSECT); | |
562 | tf->lbal = readb(port_base + PORT_TF_LBAL); | |
563 | tf->lbam = readb(port_base + PORT_TF_LBAM); | |
564 | tf->lbah = readb(port_base + PORT_TF_LBAH); | |
565 | tf->device = readb(port_base + PORT_TF_DEVICE); | |
566 | tf->command = readb(port_base + PORT_TF_COMMAND); | |
567 | } | |
568 | ||
569 | static bool inic_qc_fill_rtf(struct ata_queued_cmd *qc) | |
570 | { | |
571 | struct ata_taskfile *rtf = &qc->result_tf; | |
572 | struct ata_taskfile tf; | |
573 | ||
574 | /* FIXME: Except for status and error, result TF access | |
575 | * doesn't work. I tried reading from BAR0/2, CPB and BAR5. | |
576 | * None works regardless of which command interface is used. | |
577 | * For now return true iff status indicates device error. | |
578 | * This means that we're reporting bogus sector for RW | |
579 | * failures. Eeekk.... | |
580 | */ | |
581 | inic_tf_read(qc->ap, &tf); | |
582 | ||
583 | if (!(tf.command & ATA_ERR)) | |
584 | return false; | |
585 | ||
586 | rtf->command = tf.command; | |
587 | rtf->feature = tf.feature; | |
588 | return true; | |
589 | } | |
590 | ||
1fd7a697 TH |
591 | static void inic_freeze(struct ata_port *ap) |
592 | { | |
593 | void __iomem *port_base = inic_port_base(ap); | |
594 | ||
ab5b0235 | 595 | writeb(PIRQ_MASK_FREEZE, port_base + PORT_IRQ_MASK); |
1fd7a697 | 596 | writeb(0xff, port_base + PORT_IRQ_STAT); |
1fd7a697 TH |
597 | } |
598 | ||
599 | static void inic_thaw(struct ata_port *ap) | |
600 | { | |
601 | void __iomem *port_base = inic_port_base(ap); | |
602 | ||
1fd7a697 | 603 | writeb(0xff, port_base + PORT_IRQ_STAT); |
ab5b0235 | 604 | writeb(PIRQ_MASK_DEFAULT, port_base + PORT_IRQ_MASK); |
1fd7a697 TH |
605 | } |
606 | ||
364fac0e TH |
607 | static int inic_check_ready(struct ata_link *link) |
608 | { | |
609 | void __iomem *port_base = inic_port_base(link->ap); | |
610 | ||
611 | return ata_check_ready(readb(port_base + PORT_TF_COMMAND)); | |
612 | } | |
613 | ||
1fd7a697 TH |
614 | /* |
615 | * SRST and SControl hardreset don't give valid signature on this | |
616 | * controller. Only controller specific hardreset mechanism works. | |
617 | */ | |
cc0680a5 | 618 | static int inic_hardreset(struct ata_link *link, unsigned int *class, |
d4b2bab4 | 619 | unsigned long deadline) |
1fd7a697 | 620 | { |
cc0680a5 | 621 | struct ata_port *ap = link->ap; |
1fd7a697 TH |
622 | void __iomem *port_base = inic_port_base(ap); |
623 | void __iomem *idma_ctl = port_base + PORT_IDMA_CTL; | |
cc0680a5 | 624 | const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context); |
1fd7a697 TH |
625 | int rc; |
626 | ||
627 | /* hammer it into sane state */ | |
628 | inic_reset_port(port_base); | |
629 | ||
f8b0685a | 630 | writew(IDMA_CTL_RST_ATA, idma_ctl); |
1fd7a697 | 631 | readw(idma_ctl); /* flush */ |
97750ceb | 632 | ata_msleep(ap, 1); |
f8b0685a | 633 | writew(0, idma_ctl); |
1fd7a697 | 634 | |
cc0680a5 | 635 | rc = sata_link_resume(link, timing, deadline); |
1fd7a697 | 636 | if (rc) { |
a9a79dfe JP |
637 | ata_link_warn(link, |
638 | "failed to resume link after reset (errno=%d)\n", | |
639 | rc); | |
1fd7a697 TH |
640 | return rc; |
641 | } | |
642 | ||
1fd7a697 | 643 | *class = ATA_DEV_NONE; |
cc0680a5 | 644 | if (ata_link_online(link)) { |
1fd7a697 TH |
645 | struct ata_taskfile tf; |
646 | ||
705e76be | 647 | /* wait for link to become ready */ |
364fac0e | 648 | rc = ata_wait_after_reset(link, deadline, inic_check_ready); |
9b89391c TH |
649 | /* link occupied, -ENODEV too is an error */ |
650 | if (rc) { | |
a9a79dfe JP |
651 | ata_link_warn(link, |
652 | "device not ready after hardreset (errno=%d)\n", | |
653 | rc); | |
d4b2bab4 | 654 | return rc; |
1fd7a697 TH |
655 | } |
656 | ||
364fac0e | 657 | inic_tf_read(ap, &tf); |
1fd7a697 | 658 | *class = ata_dev_classify(&tf); |
1fd7a697 TH |
659 | } |
660 | ||
661 | return 0; | |
662 | } | |
663 | ||
664 | static void inic_error_handler(struct ata_port *ap) | |
665 | { | |
666 | void __iomem *port_base = inic_port_base(ap); | |
1fd7a697 | 667 | |
1fd7a697 | 668 | inic_reset_port(port_base); |
a1efdaba | 669 | ata_std_error_handler(ap); |
1fd7a697 TH |
670 | } |
671 | ||
672 | static void inic_post_internal_cmd(struct ata_queued_cmd *qc) | |
673 | { | |
674 | /* make DMA engine forget about the failed command */ | |
a51d644a | 675 | if (qc->flags & ATA_QCFLAG_FAILED) |
1fd7a697 TH |
676 | inic_reset_port(inic_port_base(qc->ap)); |
677 | } | |
678 | ||
1fd7a697 TH |
679 | static void init_port(struct ata_port *ap) |
680 | { | |
681 | void __iomem *port_base = inic_port_base(ap); | |
3ad400a9 | 682 | struct inic_port_priv *pp = ap->private_data; |
1fd7a697 | 683 | |
3ad400a9 TH |
684 | /* clear packet and CPB table */ |
685 | memset(pp->pkt, 0, sizeof(struct inic_pkt)); | |
686 | memset(pp->cpb_tbl, 0, IDMA_CPB_TBL_SIZE); | |
687 | ||
6bc0d390 | 688 | /* setup CPB lookup table addresses */ |
3ad400a9 | 689 | writel(pp->cpb_tbl_dma, port_base + PORT_CPB_CPBLAR); |
1fd7a697 TH |
690 | } |
691 | ||
692 | static int inic_port_resume(struct ata_port *ap) | |
693 | { | |
694 | init_port(ap); | |
695 | return 0; | |
696 | } | |
697 | ||
698 | static int inic_port_start(struct ata_port *ap) | |
699 | { | |
3ad400a9 | 700 | struct device *dev = ap->host->dev; |
1fd7a697 | 701 | struct inic_port_priv *pp; |
1fd7a697 TH |
702 | |
703 | /* alloc and initialize private data */ | |
3ad400a9 | 704 | pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL); |
1fd7a697 TH |
705 | if (!pp) |
706 | return -ENOMEM; | |
707 | ap->private_data = pp; | |
708 | ||
1fd7a697 | 709 | /* Alloc resources */ |
3ad400a9 TH |
710 | pp->pkt = dmam_alloc_coherent(dev, sizeof(struct inic_pkt), |
711 | &pp->pkt_dma, GFP_KERNEL); | |
712 | if (!pp->pkt) | |
713 | return -ENOMEM; | |
714 | ||
715 | pp->cpb_tbl = dmam_alloc_coherent(dev, IDMA_CPB_TBL_SIZE, | |
716 | &pp->cpb_tbl_dma, GFP_KERNEL); | |
717 | if (!pp->cpb_tbl) | |
718 | return -ENOMEM; | |
719 | ||
1fd7a697 TH |
720 | init_port(ap); |
721 | ||
722 | return 0; | |
723 | } | |
724 | ||
1fd7a697 | 725 | static struct ata_port_operations inic_port_ops = { |
f8b0685a | 726 | .inherits = &sata_port_ops, |
1fd7a697 | 727 | |
b3f677e5 | 728 | .check_atapi_dma = inic_check_atapi_dma, |
3ad400a9 | 729 | .qc_prep = inic_qc_prep, |
1fd7a697 | 730 | .qc_issue = inic_qc_issue, |
364fac0e | 731 | .qc_fill_rtf = inic_qc_fill_rtf, |
1fd7a697 TH |
732 | |
733 | .freeze = inic_freeze, | |
734 | .thaw = inic_thaw, | |
a1efdaba | 735 | .hardreset = inic_hardreset, |
1fd7a697 TH |
736 | .error_handler = inic_error_handler, |
737 | .post_internal_cmd = inic_post_internal_cmd, | |
1fd7a697 | 738 | |
029cfd6b TH |
739 | .scr_read = inic_scr_read, |
740 | .scr_write = inic_scr_write, | |
1fd7a697 | 741 | |
029cfd6b | 742 | .port_resume = inic_port_resume, |
1fd7a697 | 743 | .port_start = inic_port_start, |
1fd7a697 TH |
744 | }; |
745 | ||
f356b082 | 746 | static const struct ata_port_info inic_port_info = { |
1fd7a697 | 747 | .flags = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA, |
14bdef98 EIB |
748 | .pio_mask = ATA_PIO4, |
749 | .mwdma_mask = ATA_MWDMA2, | |
bf6263a8 | 750 | .udma_mask = ATA_UDMA6, |
1fd7a697 TH |
751 | .port_ops = &inic_port_ops |
752 | }; | |
753 | ||
754 | static int init_controller(void __iomem *mmio_base, u16 hctl) | |
755 | { | |
756 | int i; | |
757 | u16 val; | |
758 | ||
759 | hctl &= ~HCTL_KNOWN_BITS; | |
760 | ||
761 | /* Soft reset whole controller. Spec says reset duration is 3 | |
762 | * PCI clocks, be generous and give it 10ms. | |
763 | */ | |
764 | writew(hctl | HCTL_SOFTRST, mmio_base + HOST_CTL); | |
765 | readw(mmio_base + HOST_CTL); /* flush */ | |
766 | ||
767 | for (i = 0; i < 10; i++) { | |
768 | msleep(1); | |
769 | val = readw(mmio_base + HOST_CTL); | |
770 | if (!(val & HCTL_SOFTRST)) | |
771 | break; | |
772 | } | |
773 | ||
774 | if (val & HCTL_SOFTRST) | |
775 | return -EIO; | |
776 | ||
777 | /* mask all interrupts and reset ports */ | |
778 | for (i = 0; i < NR_PORTS; i++) { | |
779 | void __iomem *port_base = mmio_base + i * PORT_SIZE; | |
780 | ||
781 | writeb(0xff, port_base + PORT_IRQ_MASK); | |
782 | inic_reset_port(port_base); | |
783 | } | |
784 | ||
785 | /* port IRQ is masked now, unmask global IRQ */ | |
786 | writew(hctl & ~HCTL_IRQOFF, mmio_base + HOST_CTL); | |
787 | val = readw(mmio_base + HOST_IRQ_MASK); | |
788 | val &= ~(HIRQ_PORT0 | HIRQ_PORT1); | |
789 | writew(val, mmio_base + HOST_IRQ_MASK); | |
790 | ||
791 | return 0; | |
792 | } | |
793 | ||
58eb8cd5 | 794 | #ifdef CONFIG_PM_SLEEP |
1fd7a697 TH |
795 | static int inic_pci_device_resume(struct pci_dev *pdev) |
796 | { | |
0a86e1c8 | 797 | struct ata_host *host = pci_get_drvdata(pdev); |
1fd7a697 | 798 | struct inic_host_priv *hpriv = host->private_data; |
1fd7a697 TH |
799 | int rc; |
800 | ||
5aea408d DM |
801 | rc = ata_pci_device_do_resume(pdev); |
802 | if (rc) | |
803 | return rc; | |
1fd7a697 TH |
804 | |
805 | if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) { | |
ba66b242 | 806 | rc = init_controller(hpriv->mmio_base, hpriv->cached_hctl); |
1fd7a697 TH |
807 | if (rc) |
808 | return rc; | |
809 | } | |
810 | ||
811 | ata_host_resume(host); | |
812 | ||
813 | return 0; | |
814 | } | |
438ac6d5 | 815 | #endif |
1fd7a697 TH |
816 | |
817 | static int inic_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) | |
818 | { | |
4447d351 TH |
819 | const struct ata_port_info *ppi[] = { &inic_port_info, NULL }; |
820 | struct ata_host *host; | |
1fd7a697 | 821 | struct inic_host_priv *hpriv; |
0d5ff566 | 822 | void __iomem * const *iomap; |
ba66b242 | 823 | int mmio_bar; |
1fd7a697 TH |
824 | int i, rc; |
825 | ||
06296a1e | 826 | ata_print_version_once(&pdev->dev, DRV_VERSION); |
1fd7a697 | 827 | |
bb969619 TH |
828 | dev_alert(&pdev->dev, "inic162x support is broken with common data corruption issues and will be disabled by default, contact linux-ide@vger.kernel.org if in production use\n"); |
829 | ||
4447d351 TH |
830 | /* alloc host */ |
831 | host = ata_host_alloc_pinfo(&pdev->dev, ppi, NR_PORTS); | |
832 | hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL); | |
833 | if (!host || !hpriv) | |
834 | return -ENOMEM; | |
835 | ||
836 | host->private_data = hpriv; | |
837 | ||
ba66b242 TH |
838 | /* Acquire resources and fill host. Note that PCI and cardbus |
839 | * use different BARs. | |
840 | */ | |
24dc5f33 | 841 | rc = pcim_enable_device(pdev); |
1fd7a697 TH |
842 | if (rc) |
843 | return rc; | |
844 | ||
ba66b242 TH |
845 | if (pci_resource_flags(pdev, MMIO_BAR_PCI) & IORESOURCE_MEM) |
846 | mmio_bar = MMIO_BAR_PCI; | |
847 | else | |
848 | mmio_bar = MMIO_BAR_CARDBUS; | |
849 | ||
850 | rc = pcim_iomap_regions(pdev, 1 << mmio_bar, DRV_NAME); | |
0d5ff566 TH |
851 | if (rc) |
852 | return rc; | |
4447d351 | 853 | host->iomap = iomap = pcim_iomap_table(pdev); |
ba66b242 TH |
854 | hpriv->mmio_base = iomap[mmio_bar]; |
855 | hpriv->cached_hctl = readw(hpriv->mmio_base + HOST_CTL); | |
4447d351 TH |
856 | |
857 | for (i = 0; i < NR_PORTS; i++) { | |
cbcdd875 | 858 | struct ata_port *ap = host->ports[i]; |
cbcdd875 | 859 | |
ba66b242 TH |
860 | ata_port_pbar_desc(ap, mmio_bar, -1, "mmio"); |
861 | ata_port_pbar_desc(ap, mmio_bar, i * PORT_SIZE, "port"); | |
4447d351 TH |
862 | } |
863 | ||
1fd7a697 | 864 | /* Set dma_mask. This devices doesn't support 64bit addressing. */ |
c54c719b | 865 | rc = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); |
1fd7a697 | 866 | if (rc) { |
a44fec1f | 867 | dev_err(&pdev->dev, "32-bit DMA enable failed\n"); |
24dc5f33 | 868 | return rc; |
1fd7a697 TH |
869 | } |
870 | ||
c54c719b | 871 | rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); |
1fd7a697 | 872 | if (rc) { |
a44fec1f | 873 | dev_err(&pdev->dev, "32-bit consistent DMA enable failed\n"); |
24dc5f33 | 874 | return rc; |
1fd7a697 TH |
875 | } |
876 | ||
ba66b242 | 877 | rc = init_controller(hpriv->mmio_base, hpriv->cached_hctl); |
1fd7a697 | 878 | if (rc) { |
a44fec1f | 879 | dev_err(&pdev->dev, "failed to initialize controller\n"); |
24dc5f33 | 880 | return rc; |
1fd7a697 TH |
881 | } |
882 | ||
883 | pci_set_master(pdev); | |
4447d351 TH |
884 | return ata_host_activate(host, pdev->irq, inic_interrupt, IRQF_SHARED, |
885 | &inic_sht); | |
1fd7a697 TH |
886 | } |
887 | ||
888 | static const struct pci_device_id inic_pci_tbl[] = { | |
889 | { PCI_VDEVICE(INIT, 0x1622), }, | |
890 | { }, | |
891 | }; | |
892 | ||
893 | static struct pci_driver inic_pci_driver = { | |
894 | .name = DRV_NAME, | |
895 | .id_table = inic_pci_tbl, | |
58eb8cd5 | 896 | #ifdef CONFIG_PM_SLEEP |
1fd7a697 TH |
897 | .suspend = ata_pci_device_suspend, |
898 | .resume = inic_pci_device_resume, | |
438ac6d5 | 899 | #endif |
1fd7a697 TH |
900 | .probe = inic_init_one, |
901 | .remove = ata_pci_remove_one, | |
902 | }; | |
903 | ||
2fc75da0 | 904 | module_pci_driver(inic_pci_driver); |
1fd7a697 TH |
905 | |
906 | MODULE_AUTHOR("Tejun Heo"); | |
907 | MODULE_DESCRIPTION("low-level driver for Initio 162x SATA"); | |
908 | MODULE_LICENSE("GPL v2"); | |
909 | MODULE_DEVICE_TABLE(pci, inic_pci_tbl); | |
910 | MODULE_VERSION(DRV_VERSION); |