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edea3ab5 ML |
1 | /* |
2 | * pdc_adma.c - Pacific Digital Corporation ADMA | |
3 | * | |
4 | * Maintained by: Mark Lord <mlord@pobox.com> | |
5 | * | |
6 | * Copyright 2005 Mark Lord | |
7 | * | |
68399bb5 JG |
8 | * This program is free software; you can redistribute it and/or modify |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2, or (at your option) | |
11 | * any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; see the file COPYING. If not, write to | |
20 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | * | |
22 | * | |
23 | * libata documentation is available via 'make {ps|pdf}docs', | |
24 | * as Documentation/DocBook/libata.* | |
edea3ab5 | 25 | * |
edea3ab5 ML |
26 | * |
27 | * Supports ATA disks in single-packet ADMA mode. | |
28 | * Uses PIO for everything else. | |
29 | * | |
30 | * TODO: Use ADMA transfers for ATAPI devices, when possible. | |
31 | * This requires careful attention to a number of quirks of the chip. | |
32 | * | |
33 | */ | |
34 | ||
35 | #include <linux/kernel.h> | |
36 | #include <linux/module.h> | |
5a0e3ad6 | 37 | #include <linux/gfp.h> |
edea3ab5 ML |
38 | #include <linux/pci.h> |
39 | #include <linux/init.h> | |
40 | #include <linux/blkdev.h> | |
41 | #include <linux/delay.h> | |
42 | #include <linux/interrupt.h> | |
a9524a76 | 43 | #include <linux/device.h> |
edea3ab5 | 44 | #include <scsi/scsi_host.h> |
edea3ab5 ML |
45 | #include <linux/libata.h> |
46 | ||
47 | #define DRV_NAME "pdc_adma" | |
2a3103ce | 48 | #define DRV_VERSION "1.0" |
edea3ab5 ML |
49 | |
50 | /* macro to calculate base address for ATA regs */ | |
5796d1c4 | 51 | #define ADMA_ATA_REGS(base, port_no) ((base) + ((port_no) * 0x40)) |
edea3ab5 ML |
52 | |
53 | /* macro to calculate base address for ADMA regs */ | |
5796d1c4 | 54 | #define ADMA_REGS(base, port_no) ((base) + 0x80 + ((port_no) * 0x20)) |
0d5ff566 | 55 | |
5d728824 TH |
56 | /* macro to obtain addresses from ata_port */ |
57 | #define ADMA_PORT_REGS(ap) \ | |
58 | ADMA_REGS((ap)->host->iomap[ADMA_MMIO_BAR], ap->port_no) | |
edea3ab5 ML |
59 | |
60 | enum { | |
0d5ff566 TH |
61 | ADMA_MMIO_BAR = 4, |
62 | ||
edea3ab5 ML |
63 | ADMA_PORTS = 2, |
64 | ADMA_CPB_BYTES = 40, | |
65 | ADMA_PRD_BYTES = LIBATA_MAX_PRD * 16, | |
66 | ADMA_PKT_BYTES = ADMA_CPB_BYTES + ADMA_PRD_BYTES, | |
67 | ||
68 | ADMA_DMA_BOUNDARY = 0xffffffff, | |
69 | ||
70 | /* global register offsets */ | |
71 | ADMA_MODE_LOCK = 0x00c7, | |
72 | ||
73 | /* per-channel register offsets */ | |
74 | ADMA_CONTROL = 0x0000, /* ADMA control */ | |
75 | ADMA_STATUS = 0x0002, /* ADMA status */ | |
76 | ADMA_CPB_COUNT = 0x0004, /* CPB count */ | |
77 | ADMA_CPB_CURRENT = 0x000c, /* current CPB address */ | |
78 | ADMA_CPB_NEXT = 0x000c, /* next CPB address */ | |
79 | ADMA_CPB_LOOKUP = 0x0010, /* CPB lookup table */ | |
80 | ADMA_FIFO_IN = 0x0014, /* input FIFO threshold */ | |
81 | ADMA_FIFO_OUT = 0x0016, /* output FIFO threshold */ | |
82 | ||
83 | /* ADMA_CONTROL register bits */ | |
84 | aNIEN = (1 << 8), /* irq mask: 1==masked */ | |
85 | aGO = (1 << 7), /* packet trigger ("Go!") */ | |
86 | aRSTADM = (1 << 5), /* ADMA logic reset */ | |
edea3ab5 ML |
87 | aPIOMD4 = 0x0003, /* PIO mode 4 */ |
88 | ||
89 | /* ADMA_STATUS register bits */ | |
90 | aPSD = (1 << 6), | |
91 | aUIRQ = (1 << 4), | |
92 | aPERR = (1 << 0), | |
93 | ||
94 | /* CPB bits */ | |
95 | cDONE = (1 << 0), | |
640fdb50 JG |
96 | cATERR = (1 << 3), |
97 | ||
edea3ab5 ML |
98 | cVLD = (1 << 0), |
99 | cDAT = (1 << 2), | |
100 | cIEN = (1 << 3), | |
101 | ||
102 | /* PRD bits */ | |
103 | pORD = (1 << 4), | |
104 | pDIRO = (1 << 5), | |
105 | pEND = (1 << 7), | |
106 | ||
107 | /* ATA register flags */ | |
108 | rIGN = (1 << 5), | |
109 | rEND = (1 << 7), | |
110 | ||
111 | /* ATA register addresses */ | |
112 | ADMA_REGS_CONTROL = 0x0e, | |
113 | ADMA_REGS_SECTOR_COUNT = 0x12, | |
114 | ADMA_REGS_LBA_LOW = 0x13, | |
115 | ADMA_REGS_LBA_MID = 0x14, | |
116 | ADMA_REGS_LBA_HIGH = 0x15, | |
117 | ADMA_REGS_DEVICE = 0x16, | |
118 | ADMA_REGS_COMMAND = 0x17, | |
119 | ||
120 | /* PCI device IDs */ | |
121 | board_1841_idx = 0, /* ADMA 2-port controller */ | |
122 | }; | |
123 | ||
124 | typedef enum { adma_state_idle, adma_state_pkt, adma_state_mmio } adma_state_t; | |
125 | ||
126 | struct adma_port_priv { | |
127 | u8 *pkt; | |
128 | dma_addr_t pkt_dma; | |
129 | adma_state_t state; | |
130 | }; | |
131 | ||
5796d1c4 | 132 | static int adma_ata_init_one(struct pci_dev *pdev, |
edea3ab5 | 133 | const struct pci_device_id *ent); |
edea3ab5 | 134 | static int adma_port_start(struct ata_port *ap); |
edea3ab5 | 135 | static void adma_port_stop(struct ata_port *ap); |
edea3ab5 | 136 | static void adma_qc_prep(struct ata_queued_cmd *qc); |
9a3d9eb0 | 137 | static unsigned int adma_qc_issue(struct ata_queued_cmd *qc); |
edea3ab5 | 138 | static int adma_check_atapi_dma(struct ata_queued_cmd *qc); |
640fdb50 JG |
139 | static void adma_freeze(struct ata_port *ap); |
140 | static void adma_thaw(struct ata_port *ap); | |
a1efdaba | 141 | static int adma_prereset(struct ata_link *link, unsigned long deadline); |
edea3ab5 | 142 | |
193515d5 | 143 | static struct scsi_host_template adma_ata_sht = { |
68d1d07b | 144 | ATA_BASE_SHT(DRV_NAME), |
edea3ab5 | 145 | .sg_tablesize = LIBATA_MAX_PRD, |
49de0ac8 | 146 | .dma_boundary = ADMA_DMA_BOUNDARY, |
edea3ab5 ML |
147 | }; |
148 | ||
029cfd6b | 149 | static struct ata_port_operations adma_ata_ops = { |
b0316b15 TH |
150 | .inherits = &ata_sff_port_ops, |
151 | ||
c96f1732 AC |
152 | .lost_interrupt = ATA_OP_NULL, |
153 | ||
029cfd6b | 154 | .check_atapi_dma = adma_check_atapi_dma, |
edea3ab5 ML |
155 | .qc_prep = adma_qc_prep, |
156 | .qc_issue = adma_qc_issue, | |
029cfd6b | 157 | |
640fdb50 JG |
158 | .freeze = adma_freeze, |
159 | .thaw = adma_thaw, | |
a1efdaba | 160 | .prereset = adma_prereset, |
029cfd6b | 161 | |
edea3ab5 ML |
162 | .port_start = adma_port_start, |
163 | .port_stop = adma_port_stop, | |
edea3ab5 ML |
164 | }; |
165 | ||
166 | static struct ata_port_info adma_port_info[] = { | |
167 | /* board_1841_idx */ | |
168 | { | |
640fdb50 | 169 | .flags = ATA_FLAG_SLAVE_POSS | |
51704c60 AL |
170 | ATA_FLAG_NO_LEGACY | ATA_FLAG_MMIO | |
171 | ATA_FLAG_PIO_POLLING, | |
14bdef98 | 172 | .pio_mask = ATA_PIO4_ONLY, |
bf6263a8 | 173 | .udma_mask = ATA_UDMA4, |
edea3ab5 ML |
174 | .port_ops = &adma_ata_ops, |
175 | }, | |
176 | }; | |
177 | ||
3b7d697d | 178 | static const struct pci_device_id adma_ata_pci_tbl[] = { |
54bb3a94 | 179 | { PCI_VDEVICE(PDC, 0x1841), board_1841_idx }, |
edea3ab5 ML |
180 | |
181 | { } /* terminate list */ | |
182 | }; | |
183 | ||
184 | static struct pci_driver adma_ata_pci_driver = { | |
185 | .name = DRV_NAME, | |
186 | .id_table = adma_ata_pci_tbl, | |
187 | .probe = adma_ata_init_one, | |
188 | .remove = ata_pci_remove_one, | |
189 | }; | |
190 | ||
191 | static int adma_check_atapi_dma(struct ata_queued_cmd *qc) | |
192 | { | |
193 | return 1; /* ATAPI DMA not yet supported */ | |
194 | } | |
195 | ||
5d728824 | 196 | static void adma_reset_engine(struct ata_port *ap) |
edea3ab5 | 197 | { |
5d728824 TH |
198 | void __iomem *chan = ADMA_PORT_REGS(ap); |
199 | ||
edea3ab5 ML |
200 | /* reset ADMA to idle state */ |
201 | writew(aPIOMD4 | aNIEN | aRSTADM, chan + ADMA_CONTROL); | |
202 | udelay(2); | |
203 | writew(aPIOMD4, chan + ADMA_CONTROL); | |
204 | udelay(2); | |
205 | } | |
206 | ||
207 | static void adma_reinit_engine(struct ata_port *ap) | |
208 | { | |
209 | struct adma_port_priv *pp = ap->private_data; | |
5d728824 | 210 | void __iomem *chan = ADMA_PORT_REGS(ap); |
edea3ab5 ML |
211 | |
212 | /* mask/clear ATA interrupts */ | |
0d5ff566 | 213 | writeb(ATA_NIEN, ap->ioaddr.ctl_addr); |
9363c382 | 214 | ata_sff_check_status(ap); |
edea3ab5 ML |
215 | |
216 | /* reset the ADMA engine */ | |
5d728824 | 217 | adma_reset_engine(ap); |
edea3ab5 ML |
218 | |
219 | /* set in-FIFO threshold to 0x100 */ | |
220 | writew(0x100, chan + ADMA_FIFO_IN); | |
221 | ||
222 | /* set CPB pointer */ | |
223 | writel((u32)pp->pkt_dma, chan + ADMA_CPB_NEXT); | |
224 | ||
225 | /* set out-FIFO threshold to 0x100 */ | |
226 | writew(0x100, chan + ADMA_FIFO_OUT); | |
227 | ||
228 | /* set CPB count */ | |
229 | writew(1, chan + ADMA_CPB_COUNT); | |
230 | ||
231 | /* read/discard ADMA status */ | |
232 | readb(chan + ADMA_STATUS); | |
233 | } | |
234 | ||
235 | static inline void adma_enter_reg_mode(struct ata_port *ap) | |
236 | { | |
5d728824 | 237 | void __iomem *chan = ADMA_PORT_REGS(ap); |
edea3ab5 ML |
238 | |
239 | writew(aPIOMD4, chan + ADMA_CONTROL); | |
240 | readb(chan + ADMA_STATUS); /* flush */ | |
241 | } | |
242 | ||
640fdb50 | 243 | static void adma_freeze(struct ata_port *ap) |
edea3ab5 | 244 | { |
640fdb50 JG |
245 | void __iomem *chan = ADMA_PORT_REGS(ap); |
246 | ||
247 | /* mask/clear ATA interrupts */ | |
248 | writeb(ATA_NIEN, ap->ioaddr.ctl_addr); | |
9363c382 | 249 | ata_sff_check_status(ap); |
640fdb50 JG |
250 | |
251 | /* reset ADMA to idle state */ | |
252 | writew(aPIOMD4 | aNIEN | aRSTADM, chan + ADMA_CONTROL); | |
253 | udelay(2); | |
254 | writew(aPIOMD4 | aNIEN, chan + ADMA_CONTROL); | |
255 | udelay(2); | |
256 | } | |
edea3ab5 | 257 | |
640fdb50 JG |
258 | static void adma_thaw(struct ata_port *ap) |
259 | { | |
edea3ab5 | 260 | adma_reinit_engine(ap); |
edea3ab5 ML |
261 | } |
262 | ||
0260731f | 263 | static int adma_prereset(struct ata_link *link, unsigned long deadline) |
edea3ab5 | 264 | { |
0260731f | 265 | struct ata_port *ap = link->ap; |
edea3ab5 ML |
266 | struct adma_port_priv *pp = ap->private_data; |
267 | ||
268 | if (pp->state != adma_state_idle) /* healthy paranoia */ | |
269 | pp->state = adma_state_mmio; | |
270 | adma_reinit_engine(ap); | |
640fdb50 | 271 | |
9363c382 | 272 | return ata_sff_prereset(link, deadline); |
640fdb50 JG |
273 | } |
274 | ||
edea3ab5 ML |
275 | static int adma_fill_sg(struct ata_queued_cmd *qc) |
276 | { | |
972c26bd | 277 | struct scatterlist *sg; |
edea3ab5 ML |
278 | struct ata_port *ap = qc->ap; |
279 | struct adma_port_priv *pp = ap->private_data; | |
3be6cbd7 | 280 | u8 *buf = pp->pkt, *last_buf = NULL; |
972c26bd | 281 | int i = (2 + buf[3]) * 8; |
edea3ab5 | 282 | u8 pFLAGS = pORD | ((qc->tf.flags & ATA_TFLAG_WRITE) ? pDIRO : 0); |
ff2aeb1e | 283 | unsigned int si; |
edea3ab5 | 284 | |
ff2aeb1e | 285 | for_each_sg(qc->sg, sg, qc->n_elem, si) { |
edea3ab5 ML |
286 | u32 addr; |
287 | u32 len; | |
288 | ||
289 | addr = (u32)sg_dma_address(sg); | |
290 | *(__le32 *)(buf + i) = cpu_to_le32(addr); | |
291 | i += 4; | |
292 | ||
293 | len = sg_dma_len(sg) >> 3; | |
294 | *(__le32 *)(buf + i) = cpu_to_le32(len); | |
295 | i += 4; | |
296 | ||
3be6cbd7 | 297 | last_buf = &buf[i]; |
edea3ab5 ML |
298 | buf[i++] = pFLAGS; |
299 | buf[i++] = qc->dev->dma_mode & 0xf; | |
300 | buf[i++] = 0; /* pPKLW */ | |
301 | buf[i++] = 0; /* reserved */ | |
302 | ||
5796d1c4 JG |
303 | *(__le32 *)(buf + i) = |
304 | (pFLAGS & pEND) ? 0 : cpu_to_le32(pp->pkt_dma + i + 4); | |
edea3ab5 ML |
305 | i += 4; |
306 | ||
db7f44d9 | 307 | VPRINTK("PRD[%u] = (0x%lX, 0x%X)\n", i/4, |
edea3ab5 ML |
308 | (unsigned long)addr, len); |
309 | } | |
3be6cbd7 JG |
310 | |
311 | if (likely(last_buf)) | |
312 | *last_buf |= pEND; | |
313 | ||
edea3ab5 ML |
314 | return i; |
315 | } | |
316 | ||
317 | static void adma_qc_prep(struct ata_queued_cmd *qc) | |
318 | { | |
319 | struct adma_port_priv *pp = qc->ap->private_data; | |
320 | u8 *buf = pp->pkt; | |
321 | u32 pkt_dma = (u32)pp->pkt_dma; | |
322 | int i = 0; | |
323 | ||
324 | VPRINTK("ENTER\n"); | |
325 | ||
326 | adma_enter_reg_mode(qc->ap); | |
f47451c4 | 327 | if (qc->tf.protocol != ATA_PROT_DMA) |
edea3ab5 | 328 | return; |
edea3ab5 ML |
329 | |
330 | buf[i++] = 0; /* Response flags */ | |
331 | buf[i++] = 0; /* reserved */ | |
332 | buf[i++] = cVLD | cDAT | cIEN; | |
333 | i++; /* cLEN, gets filled in below */ | |
334 | ||
335 | *(__le32 *)(buf+i) = cpu_to_le32(pkt_dma); /* cNCPB */ | |
336 | i += 4; /* cNCPB */ | |
337 | i += 4; /* cPRD, gets filled in below */ | |
338 | ||
339 | buf[i++] = 0; /* reserved */ | |
340 | buf[i++] = 0; /* reserved */ | |
341 | buf[i++] = 0; /* reserved */ | |
342 | buf[i++] = 0; /* reserved */ | |
343 | ||
344 | /* ATA registers; must be a multiple of 4 */ | |
345 | buf[i++] = qc->tf.device; | |
346 | buf[i++] = ADMA_REGS_DEVICE; | |
347 | if ((qc->tf.flags & ATA_TFLAG_LBA48)) { | |
348 | buf[i++] = qc->tf.hob_nsect; | |
349 | buf[i++] = ADMA_REGS_SECTOR_COUNT; | |
350 | buf[i++] = qc->tf.hob_lbal; | |
351 | buf[i++] = ADMA_REGS_LBA_LOW; | |
352 | buf[i++] = qc->tf.hob_lbam; | |
353 | buf[i++] = ADMA_REGS_LBA_MID; | |
354 | buf[i++] = qc->tf.hob_lbah; | |
355 | buf[i++] = ADMA_REGS_LBA_HIGH; | |
356 | } | |
357 | buf[i++] = qc->tf.nsect; | |
358 | buf[i++] = ADMA_REGS_SECTOR_COUNT; | |
359 | buf[i++] = qc->tf.lbal; | |
360 | buf[i++] = ADMA_REGS_LBA_LOW; | |
361 | buf[i++] = qc->tf.lbam; | |
362 | buf[i++] = ADMA_REGS_LBA_MID; | |
363 | buf[i++] = qc->tf.lbah; | |
364 | buf[i++] = ADMA_REGS_LBA_HIGH; | |
365 | buf[i++] = 0; | |
366 | buf[i++] = ADMA_REGS_CONTROL; | |
367 | buf[i++] = rIGN; | |
368 | buf[i++] = 0; | |
369 | buf[i++] = qc->tf.command; | |
370 | buf[i++] = ADMA_REGS_COMMAND | rEND; | |
371 | ||
372 | buf[3] = (i >> 3) - 2; /* cLEN */ | |
373 | *(__le32 *)(buf+8) = cpu_to_le32(pkt_dma + i); /* cPRD */ | |
374 | ||
375 | i = adma_fill_sg(qc); | |
376 | wmb(); /* flush PRDs and pkt to memory */ | |
377 | #if 0 | |
378 | /* dump out CPB + PRDs for debug */ | |
379 | { | |
380 | int j, len = 0; | |
381 | static char obuf[2048]; | |
382 | for (j = 0; j < i; ++j) { | |
383 | len += sprintf(obuf+len, "%02x ", buf[j]); | |
384 | if ((j & 7) == 7) { | |
385 | printk("%s\n", obuf); | |
386 | len = 0; | |
387 | } | |
388 | } | |
389 | if (len) | |
390 | printk("%s\n", obuf); | |
391 | } | |
392 | #endif | |
393 | } | |
394 | ||
395 | static inline void adma_packet_start(struct ata_queued_cmd *qc) | |
396 | { | |
397 | struct ata_port *ap = qc->ap; | |
5d728824 | 398 | void __iomem *chan = ADMA_PORT_REGS(ap); |
edea3ab5 ML |
399 | |
400 | VPRINTK("ENTER, ap %p\n", ap); | |
401 | ||
402 | /* fire up the ADMA engine */ | |
68399bb5 | 403 | writew(aPIOMD4 | aGO, chan + ADMA_CONTROL); |
edea3ab5 ML |
404 | } |
405 | ||
9a3d9eb0 | 406 | static unsigned int adma_qc_issue(struct ata_queued_cmd *qc) |
edea3ab5 ML |
407 | { |
408 | struct adma_port_priv *pp = qc->ap->private_data; | |
409 | ||
410 | switch (qc->tf.protocol) { | |
411 | case ATA_PROT_DMA: | |
412 | pp->state = adma_state_pkt; | |
413 | adma_packet_start(qc); | |
414 | return 0; | |
415 | ||
0dc36888 | 416 | case ATAPI_PROT_DMA: |
edea3ab5 ML |
417 | BUG(); |
418 | break; | |
419 | ||
420 | default: | |
421 | break; | |
422 | } | |
423 | ||
424 | pp->state = adma_state_mmio; | |
9363c382 | 425 | return ata_sff_qc_issue(qc); |
edea3ab5 ML |
426 | } |
427 | ||
cca3974e | 428 | static inline unsigned int adma_intr_pkt(struct ata_host *host) |
edea3ab5 ML |
429 | { |
430 | unsigned int handled = 0, port_no; | |
edea3ab5 | 431 | |
cca3974e JG |
432 | for (port_no = 0; port_no < host->n_ports; ++port_no) { |
433 | struct ata_port *ap = host->ports[port_no]; | |
edea3ab5 ML |
434 | struct adma_port_priv *pp; |
435 | struct ata_queued_cmd *qc; | |
5d728824 | 436 | void __iomem *chan = ADMA_PORT_REGS(ap); |
a7dac447 | 437 | u8 status = readb(chan + ADMA_STATUS); |
edea3ab5 ML |
438 | |
439 | if (status == 0) | |
440 | continue; | |
441 | handled = 1; | |
442 | adma_enter_reg_mode(ap); | |
edea3ab5 ML |
443 | pp = ap->private_data; |
444 | if (!pp || pp->state != adma_state_pkt) | |
445 | continue; | |
9af5c9c9 | 446 | qc = ata_qc_from_tag(ap, ap->link.active_tag); |
94ec1ef1 | 447 | if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) { |
640fdb50 JG |
448 | if (status & aPERR) |
449 | qc->err_mask |= AC_ERR_HOST_BUS; | |
450 | else if ((status & (aPSD | aUIRQ))) | |
a22e2eb0 | 451 | qc->err_mask |= AC_ERR_OTHER; |
640fdb50 JG |
452 | |
453 | if (pp->pkt[0] & cATERR) | |
454 | qc->err_mask |= AC_ERR_DEV; | |
a21a84a3 | 455 | else if (pp->pkt[0] != cDONE) |
a22e2eb0 | 456 | qc->err_mask |= AC_ERR_OTHER; |
a7dac447 | 457 | |
640fdb50 JG |
458 | if (!qc->err_mask) |
459 | ata_qc_complete(qc); | |
460 | else { | |
9af5c9c9 | 461 | struct ata_eh_info *ehi = &ap->link.eh_info; |
640fdb50 JG |
462 | ata_ehi_clear_desc(ehi); |
463 | ata_ehi_push_desc(ehi, | |
464 | "ADMA-status 0x%02X", status); | |
465 | ata_ehi_push_desc(ehi, | |
466 | "pkt[0] 0x%02X", pp->pkt[0]); | |
467 | ||
468 | if (qc->err_mask == AC_ERR_DEV) | |
469 | ata_port_abort(ap); | |
470 | else | |
471 | ata_port_freeze(ap); | |
472 | } | |
a21a84a3 | 473 | } |
edea3ab5 ML |
474 | } |
475 | return handled; | |
476 | } | |
477 | ||
cca3974e | 478 | static inline unsigned int adma_intr_mmio(struct ata_host *host) |
edea3ab5 ML |
479 | { |
480 | unsigned int handled = 0, port_no; | |
481 | ||
cca3974e | 482 | for (port_no = 0; port_no < host->n_ports; ++port_no) { |
3e4ec344 TH |
483 | struct ata_port *ap = host->ports[port_no]; |
484 | struct adma_port_priv *pp = ap->private_data; | |
485 | struct ata_queued_cmd *qc; | |
486 | ||
487 | if (!pp || pp->state != adma_state_mmio) | |
488 | continue; | |
489 | qc = ata_qc_from_tag(ap, ap->link.active_tag); | |
490 | if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) { | |
491 | ||
492 | /* check main status, clearing INTRQ */ | |
493 | u8 status = ata_sff_check_status(ap); | |
494 | if ((status & ATA_BUSY)) | |
edea3ab5 | 495 | continue; |
3e4ec344 TH |
496 | DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n", |
497 | ap->print_id, qc->tf.protocol, status); | |
498 | ||
499 | /* complete taskfile transaction */ | |
500 | pp->state = adma_state_idle; | |
501 | qc->err_mask |= ac_err_mask(status); | |
502 | if (!qc->err_mask) | |
503 | ata_qc_complete(qc); | |
504 | else { | |
505 | struct ata_eh_info *ehi = &ap->link.eh_info; | |
506 | ata_ehi_clear_desc(ehi); | |
507 | ata_ehi_push_desc(ehi, "status 0x%02X", status); | |
508 | ||
509 | if (qc->err_mask == AC_ERR_DEV) | |
510 | ata_port_abort(ap); | |
511 | else | |
512 | ata_port_freeze(ap); | |
edea3ab5 | 513 | } |
3e4ec344 | 514 | handled = 1; |
edea3ab5 ML |
515 | } |
516 | } | |
517 | return handled; | |
518 | } | |
519 | ||
7d12e780 | 520 | static irqreturn_t adma_intr(int irq, void *dev_instance) |
edea3ab5 | 521 | { |
cca3974e | 522 | struct ata_host *host = dev_instance; |
edea3ab5 ML |
523 | unsigned int handled = 0; |
524 | ||
525 | VPRINTK("ENTER\n"); | |
526 | ||
cca3974e JG |
527 | spin_lock(&host->lock); |
528 | handled = adma_intr_pkt(host) | adma_intr_mmio(host); | |
529 | spin_unlock(&host->lock); | |
edea3ab5 ML |
530 | |
531 | VPRINTK("EXIT\n"); | |
532 | ||
533 | return IRQ_RETVAL(handled); | |
534 | } | |
535 | ||
0d5ff566 | 536 | static void adma_ata_setup_port(struct ata_ioports *port, void __iomem *base) |
edea3ab5 ML |
537 | { |
538 | port->cmd_addr = | |
539 | port->data_addr = base + 0x000; | |
540 | port->error_addr = | |
541 | port->feature_addr = base + 0x004; | |
542 | port->nsect_addr = base + 0x008; | |
543 | port->lbal_addr = base + 0x00c; | |
544 | port->lbam_addr = base + 0x010; | |
545 | port->lbah_addr = base + 0x014; | |
546 | port->device_addr = base + 0x018; | |
547 | port->status_addr = | |
548 | port->command_addr = base + 0x01c; | |
549 | port->altstatus_addr = | |
550 | port->ctl_addr = base + 0x038; | |
551 | } | |
552 | ||
553 | static int adma_port_start(struct ata_port *ap) | |
554 | { | |
cca3974e | 555 | struct device *dev = ap->host->dev; |
edea3ab5 | 556 | struct adma_port_priv *pp; |
edea3ab5 | 557 | |
edea3ab5 | 558 | adma_enter_reg_mode(ap); |
24dc5f33 | 559 | pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL); |
edea3ab5 | 560 | if (!pp) |
24dc5f33 TH |
561 | return -ENOMEM; |
562 | pp->pkt = dmam_alloc_coherent(dev, ADMA_PKT_BYTES, &pp->pkt_dma, | |
563 | GFP_KERNEL); | |
edea3ab5 | 564 | if (!pp->pkt) |
24dc5f33 | 565 | return -ENOMEM; |
edea3ab5 ML |
566 | /* paranoia? */ |
567 | if ((pp->pkt_dma & 7) != 0) { | |
5796d1c4 | 568 | printk(KERN_ERR "bad alignment for pp->pkt_dma: %08x\n", |
edea3ab5 | 569 | (u32)pp->pkt_dma); |
24dc5f33 | 570 | return -ENOMEM; |
edea3ab5 ML |
571 | } |
572 | memset(pp->pkt, 0, ADMA_PKT_BYTES); | |
573 | ap->private_data = pp; | |
574 | adma_reinit_engine(ap); | |
575 | return 0; | |
edea3ab5 ML |
576 | } |
577 | ||
578 | static void adma_port_stop(struct ata_port *ap) | |
579 | { | |
5d728824 | 580 | adma_reset_engine(ap); |
edea3ab5 ML |
581 | } |
582 | ||
5d728824 | 583 | static void adma_host_init(struct ata_host *host, unsigned int chip_id) |
edea3ab5 ML |
584 | { |
585 | unsigned int port_no; | |
edea3ab5 ML |
586 | |
587 | /* enable/lock aGO operation */ | |
5d728824 | 588 | writeb(7, host->iomap[ADMA_MMIO_BAR] + ADMA_MODE_LOCK); |
edea3ab5 ML |
589 | |
590 | /* reset the ADMA logic */ | |
591 | for (port_no = 0; port_no < ADMA_PORTS; ++port_no) | |
5d728824 | 592 | adma_reset_engine(host->ports[port_no]); |
edea3ab5 ML |
593 | } |
594 | ||
595 | static int adma_set_dma_masks(struct pci_dev *pdev, void __iomem *mmio_base) | |
596 | { | |
597 | int rc; | |
598 | ||
284901a9 | 599 | rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
edea3ab5 | 600 | if (rc) { |
a9524a76 JG |
601 | dev_printk(KERN_ERR, &pdev->dev, |
602 | "32-bit DMA enable failed\n"); | |
edea3ab5 ML |
603 | return rc; |
604 | } | |
284901a9 | 605 | rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); |
edea3ab5 | 606 | if (rc) { |
a9524a76 JG |
607 | dev_printk(KERN_ERR, &pdev->dev, |
608 | "32-bit consistent DMA enable failed\n"); | |
edea3ab5 ML |
609 | return rc; |
610 | } | |
611 | return 0; | |
612 | } | |
613 | ||
614 | static int adma_ata_init_one(struct pci_dev *pdev, | |
0d5ff566 | 615 | const struct pci_device_id *ent) |
edea3ab5 ML |
616 | { |
617 | static int printed_version; | |
edea3ab5 | 618 | unsigned int board_idx = (unsigned int) ent->driver_data; |
5d728824 TH |
619 | const struct ata_port_info *ppi[] = { &adma_port_info[board_idx], NULL }; |
620 | struct ata_host *host; | |
621 | void __iomem *mmio_base; | |
edea3ab5 ML |
622 | int rc, port_no; |
623 | ||
624 | if (!printed_version++) | |
a9524a76 | 625 | dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n"); |
edea3ab5 | 626 | |
5d728824 TH |
627 | /* alloc host */ |
628 | host = ata_host_alloc_pinfo(&pdev->dev, ppi, ADMA_PORTS); | |
629 | if (!host) | |
630 | return -ENOMEM; | |
631 | ||
632 | /* acquire resources and fill host */ | |
24dc5f33 | 633 | rc = pcim_enable_device(pdev); |
edea3ab5 ML |
634 | if (rc) |
635 | return rc; | |
636 | ||
24dc5f33 TH |
637 | if ((pci_resource_flags(pdev, 4) & IORESOURCE_MEM) == 0) |
638 | return -ENODEV; | |
edea3ab5 | 639 | |
0d5ff566 TH |
640 | rc = pcim_iomap_regions(pdev, 1 << ADMA_MMIO_BAR, DRV_NAME); |
641 | if (rc) | |
642 | return rc; | |
5d728824 TH |
643 | host->iomap = pcim_iomap_table(pdev); |
644 | mmio_base = host->iomap[ADMA_MMIO_BAR]; | |
edea3ab5 ML |
645 | |
646 | rc = adma_set_dma_masks(pdev, mmio_base); | |
647 | if (rc) | |
24dc5f33 | 648 | return rc; |
edea3ab5 | 649 | |
cbcdd875 TH |
650 | for (port_no = 0; port_no < ADMA_PORTS; ++port_no) { |
651 | struct ata_port *ap = host->ports[port_no]; | |
652 | void __iomem *port_base = ADMA_ATA_REGS(mmio_base, port_no); | |
653 | unsigned int offset = port_base - mmio_base; | |
654 | ||
655 | adma_ata_setup_port(&ap->ioaddr, port_base); | |
656 | ||
657 | ata_port_pbar_desc(ap, ADMA_MMIO_BAR, -1, "mmio"); | |
658 | ata_port_pbar_desc(ap, ADMA_MMIO_BAR, offset, "port"); | |
659 | } | |
edea3ab5 ML |
660 | |
661 | /* initialize adapter */ | |
5d728824 | 662 | adma_host_init(host, board_idx); |
edea3ab5 | 663 | |
5d728824 TH |
664 | pci_set_master(pdev); |
665 | return ata_host_activate(host, pdev->irq, adma_intr, IRQF_SHARED, | |
666 | &adma_ata_sht); | |
edea3ab5 ML |
667 | } |
668 | ||
669 | static int __init adma_ata_init(void) | |
670 | { | |
b7887196 | 671 | return pci_register_driver(&adma_ata_pci_driver); |
edea3ab5 ML |
672 | } |
673 | ||
674 | static void __exit adma_ata_exit(void) | |
675 | { | |
676 | pci_unregister_driver(&adma_ata_pci_driver); | |
677 | } | |
678 | ||
679 | MODULE_AUTHOR("Mark Lord"); | |
680 | MODULE_DESCRIPTION("Pacific Digital Corporation ADMA low-level driver"); | |
681 | MODULE_LICENSE("GPL"); | |
682 | MODULE_DEVICE_TABLE(pci, adma_ata_pci_tbl); | |
683 | MODULE_VERSION(DRV_VERSION); | |
684 | ||
685 | module_init(adma_ata_init); | |
686 | module_exit(adma_ata_exit); |