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c82ee6d3 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
edea3ab5 ML |
2 | /* |
3 | * pdc_adma.c - Pacific Digital Corporation ADMA | |
4 | * | |
8c3d3d4b | 5 | * Maintained by: Tejun Heo <tj@kernel.org> |
edea3ab5 ML |
6 | * |
7 | * Copyright 2005 Mark Lord | |
8 | * | |
68399bb5 | 9 | * libata documentation is available via 'make {ps|pdf}docs', |
19285f3c | 10 | * as Documentation/driver-api/libata.rst |
edea3ab5 | 11 | * |
edea3ab5 ML |
12 | * Supports ATA disks in single-packet ADMA mode. |
13 | * Uses PIO for everything else. | |
14 | * | |
15 | * TODO: Use ADMA transfers for ATAPI devices, when possible. | |
16 | * This requires careful attention to a number of quirks of the chip. | |
edea3ab5 ML |
17 | */ |
18 | ||
19 | #include <linux/kernel.h> | |
20 | #include <linux/module.h> | |
5a0e3ad6 | 21 | #include <linux/gfp.h> |
edea3ab5 | 22 | #include <linux/pci.h> |
edea3ab5 ML |
23 | #include <linux/blkdev.h> |
24 | #include <linux/delay.h> | |
25 | #include <linux/interrupt.h> | |
a9524a76 | 26 | #include <linux/device.h> |
edea3ab5 | 27 | #include <scsi/scsi_host.h> |
edea3ab5 ML |
28 | #include <linux/libata.h> |
29 | ||
30 | #define DRV_NAME "pdc_adma" | |
2a3103ce | 31 | #define DRV_VERSION "1.0" |
edea3ab5 ML |
32 | |
33 | /* macro to calculate base address for ATA regs */ | |
5796d1c4 | 34 | #define ADMA_ATA_REGS(base, port_no) ((base) + ((port_no) * 0x40)) |
edea3ab5 ML |
35 | |
36 | /* macro to calculate base address for ADMA regs */ | |
5796d1c4 | 37 | #define ADMA_REGS(base, port_no) ((base) + 0x80 + ((port_no) * 0x20)) |
0d5ff566 | 38 | |
5d728824 TH |
39 | /* macro to obtain addresses from ata_port */ |
40 | #define ADMA_PORT_REGS(ap) \ | |
41 | ADMA_REGS((ap)->host->iomap[ADMA_MMIO_BAR], ap->port_no) | |
edea3ab5 ML |
42 | |
43 | enum { | |
0d5ff566 TH |
44 | ADMA_MMIO_BAR = 4, |
45 | ||
edea3ab5 ML |
46 | ADMA_PORTS = 2, |
47 | ADMA_CPB_BYTES = 40, | |
48 | ADMA_PRD_BYTES = LIBATA_MAX_PRD * 16, | |
49 | ADMA_PKT_BYTES = ADMA_CPB_BYTES + ADMA_PRD_BYTES, | |
50 | ||
51 | ADMA_DMA_BOUNDARY = 0xffffffff, | |
52 | ||
53 | /* global register offsets */ | |
54 | ADMA_MODE_LOCK = 0x00c7, | |
55 | ||
56 | /* per-channel register offsets */ | |
57 | ADMA_CONTROL = 0x0000, /* ADMA control */ | |
58 | ADMA_STATUS = 0x0002, /* ADMA status */ | |
59 | ADMA_CPB_COUNT = 0x0004, /* CPB count */ | |
60 | ADMA_CPB_CURRENT = 0x000c, /* current CPB address */ | |
61 | ADMA_CPB_NEXT = 0x000c, /* next CPB address */ | |
62 | ADMA_CPB_LOOKUP = 0x0010, /* CPB lookup table */ | |
63 | ADMA_FIFO_IN = 0x0014, /* input FIFO threshold */ | |
64 | ADMA_FIFO_OUT = 0x0016, /* output FIFO threshold */ | |
65 | ||
66 | /* ADMA_CONTROL register bits */ | |
67 | aNIEN = (1 << 8), /* irq mask: 1==masked */ | |
68 | aGO = (1 << 7), /* packet trigger ("Go!") */ | |
69 | aRSTADM = (1 << 5), /* ADMA logic reset */ | |
edea3ab5 ML |
70 | aPIOMD4 = 0x0003, /* PIO mode 4 */ |
71 | ||
72 | /* ADMA_STATUS register bits */ | |
73 | aPSD = (1 << 6), | |
74 | aUIRQ = (1 << 4), | |
75 | aPERR = (1 << 0), | |
76 | ||
77 | /* CPB bits */ | |
78 | cDONE = (1 << 0), | |
640fdb50 JG |
79 | cATERR = (1 << 3), |
80 | ||
edea3ab5 ML |
81 | cVLD = (1 << 0), |
82 | cDAT = (1 << 2), | |
83 | cIEN = (1 << 3), | |
84 | ||
85 | /* PRD bits */ | |
86 | pORD = (1 << 4), | |
87 | pDIRO = (1 << 5), | |
88 | pEND = (1 << 7), | |
89 | ||
90 | /* ATA register flags */ | |
91 | rIGN = (1 << 5), | |
92 | rEND = (1 << 7), | |
93 | ||
94 | /* ATA register addresses */ | |
95 | ADMA_REGS_CONTROL = 0x0e, | |
96 | ADMA_REGS_SECTOR_COUNT = 0x12, | |
97 | ADMA_REGS_LBA_LOW = 0x13, | |
98 | ADMA_REGS_LBA_MID = 0x14, | |
99 | ADMA_REGS_LBA_HIGH = 0x15, | |
100 | ADMA_REGS_DEVICE = 0x16, | |
101 | ADMA_REGS_COMMAND = 0x17, | |
102 | ||
103 | /* PCI device IDs */ | |
104 | board_1841_idx = 0, /* ADMA 2-port controller */ | |
105 | }; | |
106 | ||
107 | typedef enum { adma_state_idle, adma_state_pkt, adma_state_mmio } adma_state_t; | |
108 | ||
109 | struct adma_port_priv { | |
110 | u8 *pkt; | |
111 | dma_addr_t pkt_dma; | |
112 | adma_state_t state; | |
113 | }; | |
114 | ||
5796d1c4 | 115 | static int adma_ata_init_one(struct pci_dev *pdev, |
edea3ab5 | 116 | const struct pci_device_id *ent); |
edea3ab5 | 117 | static int adma_port_start(struct ata_port *ap); |
edea3ab5 | 118 | static void adma_port_stop(struct ata_port *ap); |
95364f36 | 119 | static enum ata_completion_errors adma_qc_prep(struct ata_queued_cmd *qc); |
9a3d9eb0 | 120 | static unsigned int adma_qc_issue(struct ata_queued_cmd *qc); |
edea3ab5 | 121 | static int adma_check_atapi_dma(struct ata_queued_cmd *qc); |
640fdb50 JG |
122 | static void adma_freeze(struct ata_port *ap); |
123 | static void adma_thaw(struct ata_port *ap); | |
a1efdaba | 124 | static int adma_prereset(struct ata_link *link, unsigned long deadline); |
edea3ab5 | 125 | |
25df73d9 | 126 | static const struct scsi_host_template adma_ata_sht = { |
68d1d07b | 127 | ATA_BASE_SHT(DRV_NAME), |
edea3ab5 | 128 | .sg_tablesize = LIBATA_MAX_PRD, |
49de0ac8 | 129 | .dma_boundary = ADMA_DMA_BOUNDARY, |
edea3ab5 ML |
130 | }; |
131 | ||
029cfd6b | 132 | static struct ata_port_operations adma_ata_ops = { |
b0316b15 TH |
133 | .inherits = &ata_sff_port_ops, |
134 | ||
c96f1732 AC |
135 | .lost_interrupt = ATA_OP_NULL, |
136 | ||
029cfd6b | 137 | .check_atapi_dma = adma_check_atapi_dma, |
edea3ab5 ML |
138 | .qc_prep = adma_qc_prep, |
139 | .qc_issue = adma_qc_issue, | |
029cfd6b | 140 | |
640fdb50 JG |
141 | .freeze = adma_freeze, |
142 | .thaw = adma_thaw, | |
a1efdaba | 143 | .prereset = adma_prereset, |
029cfd6b | 144 | |
edea3ab5 ML |
145 | .port_start = adma_port_start, |
146 | .port_stop = adma_port_stop, | |
edea3ab5 ML |
147 | }; |
148 | ||
149 | static struct ata_port_info adma_port_info[] = { | |
150 | /* board_1841_idx */ | |
151 | { | |
9cbe056f | 152 | .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_POLLING, |
14bdef98 | 153 | .pio_mask = ATA_PIO4_ONLY, |
bf6263a8 | 154 | .udma_mask = ATA_UDMA4, |
edea3ab5 ML |
155 | .port_ops = &adma_ata_ops, |
156 | }, | |
157 | }; | |
158 | ||
3b7d697d | 159 | static const struct pci_device_id adma_ata_pci_tbl[] = { |
54bb3a94 | 160 | { PCI_VDEVICE(PDC, 0x1841), board_1841_idx }, |
edea3ab5 ML |
161 | |
162 | { } /* terminate list */ | |
163 | }; | |
164 | ||
165 | static struct pci_driver adma_ata_pci_driver = { | |
166 | .name = DRV_NAME, | |
167 | .id_table = adma_ata_pci_tbl, | |
168 | .probe = adma_ata_init_one, | |
169 | .remove = ata_pci_remove_one, | |
170 | }; | |
171 | ||
172 | static int adma_check_atapi_dma(struct ata_queued_cmd *qc) | |
173 | { | |
174 | return 1; /* ATAPI DMA not yet supported */ | |
175 | } | |
176 | ||
5d728824 | 177 | static void adma_reset_engine(struct ata_port *ap) |
edea3ab5 | 178 | { |
5d728824 TH |
179 | void __iomem *chan = ADMA_PORT_REGS(ap); |
180 | ||
edea3ab5 ML |
181 | /* reset ADMA to idle state */ |
182 | writew(aPIOMD4 | aNIEN | aRSTADM, chan + ADMA_CONTROL); | |
183 | udelay(2); | |
184 | writew(aPIOMD4, chan + ADMA_CONTROL); | |
185 | udelay(2); | |
186 | } | |
187 | ||
188 | static void adma_reinit_engine(struct ata_port *ap) | |
189 | { | |
190 | struct adma_port_priv *pp = ap->private_data; | |
5d728824 | 191 | void __iomem *chan = ADMA_PORT_REGS(ap); |
edea3ab5 ML |
192 | |
193 | /* mask/clear ATA interrupts */ | |
0d5ff566 | 194 | writeb(ATA_NIEN, ap->ioaddr.ctl_addr); |
9363c382 | 195 | ata_sff_check_status(ap); |
edea3ab5 ML |
196 | |
197 | /* reset the ADMA engine */ | |
5d728824 | 198 | adma_reset_engine(ap); |
edea3ab5 ML |
199 | |
200 | /* set in-FIFO threshold to 0x100 */ | |
201 | writew(0x100, chan + ADMA_FIFO_IN); | |
202 | ||
203 | /* set CPB pointer */ | |
204 | writel((u32)pp->pkt_dma, chan + ADMA_CPB_NEXT); | |
205 | ||
206 | /* set out-FIFO threshold to 0x100 */ | |
207 | writew(0x100, chan + ADMA_FIFO_OUT); | |
208 | ||
209 | /* set CPB count */ | |
210 | writew(1, chan + ADMA_CPB_COUNT); | |
211 | ||
212 | /* read/discard ADMA status */ | |
213 | readb(chan + ADMA_STATUS); | |
214 | } | |
215 | ||
216 | static inline void adma_enter_reg_mode(struct ata_port *ap) | |
217 | { | |
5d728824 | 218 | void __iomem *chan = ADMA_PORT_REGS(ap); |
edea3ab5 ML |
219 | |
220 | writew(aPIOMD4, chan + ADMA_CONTROL); | |
221 | readb(chan + ADMA_STATUS); /* flush */ | |
222 | } | |
223 | ||
640fdb50 | 224 | static void adma_freeze(struct ata_port *ap) |
edea3ab5 | 225 | { |
640fdb50 JG |
226 | void __iomem *chan = ADMA_PORT_REGS(ap); |
227 | ||
228 | /* mask/clear ATA interrupts */ | |
229 | writeb(ATA_NIEN, ap->ioaddr.ctl_addr); | |
9363c382 | 230 | ata_sff_check_status(ap); |
640fdb50 JG |
231 | |
232 | /* reset ADMA to idle state */ | |
233 | writew(aPIOMD4 | aNIEN | aRSTADM, chan + ADMA_CONTROL); | |
234 | udelay(2); | |
235 | writew(aPIOMD4 | aNIEN, chan + ADMA_CONTROL); | |
236 | udelay(2); | |
237 | } | |
edea3ab5 | 238 | |
640fdb50 JG |
239 | static void adma_thaw(struct ata_port *ap) |
240 | { | |
edea3ab5 | 241 | adma_reinit_engine(ap); |
edea3ab5 ML |
242 | } |
243 | ||
0260731f | 244 | static int adma_prereset(struct ata_link *link, unsigned long deadline) |
edea3ab5 | 245 | { |
0260731f | 246 | struct ata_port *ap = link->ap; |
edea3ab5 ML |
247 | struct adma_port_priv *pp = ap->private_data; |
248 | ||
249 | if (pp->state != adma_state_idle) /* healthy paranoia */ | |
250 | pp->state = adma_state_mmio; | |
251 | adma_reinit_engine(ap); | |
640fdb50 | 252 | |
9363c382 | 253 | return ata_sff_prereset(link, deadline); |
640fdb50 JG |
254 | } |
255 | ||
edea3ab5 ML |
256 | static int adma_fill_sg(struct ata_queued_cmd *qc) |
257 | { | |
972c26bd | 258 | struct scatterlist *sg; |
edea3ab5 ML |
259 | struct ata_port *ap = qc->ap; |
260 | struct adma_port_priv *pp = ap->private_data; | |
3be6cbd7 | 261 | u8 *buf = pp->pkt, *last_buf = NULL; |
972c26bd | 262 | int i = (2 + buf[3]) * 8; |
edea3ab5 | 263 | u8 pFLAGS = pORD | ((qc->tf.flags & ATA_TFLAG_WRITE) ? pDIRO : 0); |
ff2aeb1e | 264 | unsigned int si; |
edea3ab5 | 265 | |
ff2aeb1e | 266 | for_each_sg(qc->sg, sg, qc->n_elem, si) { |
edea3ab5 ML |
267 | u32 addr; |
268 | u32 len; | |
269 | ||
270 | addr = (u32)sg_dma_address(sg); | |
271 | *(__le32 *)(buf + i) = cpu_to_le32(addr); | |
272 | i += 4; | |
273 | ||
274 | len = sg_dma_len(sg) >> 3; | |
275 | *(__le32 *)(buf + i) = cpu_to_le32(len); | |
276 | i += 4; | |
277 | ||
3be6cbd7 | 278 | last_buf = &buf[i]; |
edea3ab5 ML |
279 | buf[i++] = pFLAGS; |
280 | buf[i++] = qc->dev->dma_mode & 0xf; | |
281 | buf[i++] = 0; /* pPKLW */ | |
282 | buf[i++] = 0; /* reserved */ | |
283 | ||
5796d1c4 JG |
284 | *(__le32 *)(buf + i) = |
285 | (pFLAGS & pEND) ? 0 : cpu_to_le32(pp->pkt_dma + i + 4); | |
edea3ab5 | 286 | i += 4; |
edea3ab5 | 287 | } |
3be6cbd7 JG |
288 | |
289 | if (likely(last_buf)) | |
290 | *last_buf |= pEND; | |
291 | ||
edea3ab5 ML |
292 | return i; |
293 | } | |
294 | ||
95364f36 | 295 | static enum ata_completion_errors adma_qc_prep(struct ata_queued_cmd *qc) |
edea3ab5 ML |
296 | { |
297 | struct adma_port_priv *pp = qc->ap->private_data; | |
298 | u8 *buf = pp->pkt; | |
299 | u32 pkt_dma = (u32)pp->pkt_dma; | |
300 | int i = 0; | |
301 | ||
edea3ab5 | 302 | adma_enter_reg_mode(qc->ap); |
f47451c4 | 303 | if (qc->tf.protocol != ATA_PROT_DMA) |
95364f36 | 304 | return AC_ERR_OK; |
edea3ab5 ML |
305 | |
306 | buf[i++] = 0; /* Response flags */ | |
307 | buf[i++] = 0; /* reserved */ | |
308 | buf[i++] = cVLD | cDAT | cIEN; | |
309 | i++; /* cLEN, gets filled in below */ | |
310 | ||
311 | *(__le32 *)(buf+i) = cpu_to_le32(pkt_dma); /* cNCPB */ | |
312 | i += 4; /* cNCPB */ | |
313 | i += 4; /* cPRD, gets filled in below */ | |
314 | ||
315 | buf[i++] = 0; /* reserved */ | |
316 | buf[i++] = 0; /* reserved */ | |
317 | buf[i++] = 0; /* reserved */ | |
318 | buf[i++] = 0; /* reserved */ | |
319 | ||
320 | /* ATA registers; must be a multiple of 4 */ | |
321 | buf[i++] = qc->tf.device; | |
322 | buf[i++] = ADMA_REGS_DEVICE; | |
323 | if ((qc->tf.flags & ATA_TFLAG_LBA48)) { | |
324 | buf[i++] = qc->tf.hob_nsect; | |
325 | buf[i++] = ADMA_REGS_SECTOR_COUNT; | |
326 | buf[i++] = qc->tf.hob_lbal; | |
327 | buf[i++] = ADMA_REGS_LBA_LOW; | |
328 | buf[i++] = qc->tf.hob_lbam; | |
329 | buf[i++] = ADMA_REGS_LBA_MID; | |
330 | buf[i++] = qc->tf.hob_lbah; | |
331 | buf[i++] = ADMA_REGS_LBA_HIGH; | |
332 | } | |
333 | buf[i++] = qc->tf.nsect; | |
334 | buf[i++] = ADMA_REGS_SECTOR_COUNT; | |
335 | buf[i++] = qc->tf.lbal; | |
336 | buf[i++] = ADMA_REGS_LBA_LOW; | |
337 | buf[i++] = qc->tf.lbam; | |
338 | buf[i++] = ADMA_REGS_LBA_MID; | |
339 | buf[i++] = qc->tf.lbah; | |
340 | buf[i++] = ADMA_REGS_LBA_HIGH; | |
341 | buf[i++] = 0; | |
342 | buf[i++] = ADMA_REGS_CONTROL; | |
343 | buf[i++] = rIGN; | |
344 | buf[i++] = 0; | |
345 | buf[i++] = qc->tf.command; | |
346 | buf[i++] = ADMA_REGS_COMMAND | rEND; | |
347 | ||
348 | buf[3] = (i >> 3) - 2; /* cLEN */ | |
349 | *(__le32 *)(buf+8) = cpu_to_le32(pkt_dma + i); /* cPRD */ | |
350 | ||
351 | i = adma_fill_sg(qc); | |
352 | wmb(); /* flush PRDs and pkt to memory */ | |
95364f36 | 353 | return AC_ERR_OK; |
edea3ab5 ML |
354 | } |
355 | ||
356 | static inline void adma_packet_start(struct ata_queued_cmd *qc) | |
357 | { | |
358 | struct ata_port *ap = qc->ap; | |
5d728824 | 359 | void __iomem *chan = ADMA_PORT_REGS(ap); |
edea3ab5 | 360 | |
edea3ab5 | 361 | /* fire up the ADMA engine */ |
68399bb5 | 362 | writew(aPIOMD4 | aGO, chan + ADMA_CONTROL); |
edea3ab5 ML |
363 | } |
364 | ||
9a3d9eb0 | 365 | static unsigned int adma_qc_issue(struct ata_queued_cmd *qc) |
edea3ab5 ML |
366 | { |
367 | struct adma_port_priv *pp = qc->ap->private_data; | |
368 | ||
369 | switch (qc->tf.protocol) { | |
370 | case ATA_PROT_DMA: | |
371 | pp->state = adma_state_pkt; | |
372 | adma_packet_start(qc); | |
373 | return 0; | |
374 | ||
0dc36888 | 375 | case ATAPI_PROT_DMA: |
edea3ab5 ML |
376 | BUG(); |
377 | break; | |
378 | ||
379 | default: | |
380 | break; | |
381 | } | |
382 | ||
383 | pp->state = adma_state_mmio; | |
9363c382 | 384 | return ata_sff_qc_issue(qc); |
edea3ab5 ML |
385 | } |
386 | ||
cca3974e | 387 | static inline unsigned int adma_intr_pkt(struct ata_host *host) |
edea3ab5 ML |
388 | { |
389 | unsigned int handled = 0, port_no; | |
edea3ab5 | 390 | |
cca3974e JG |
391 | for (port_no = 0; port_no < host->n_ports; ++port_no) { |
392 | struct ata_port *ap = host->ports[port_no]; | |
edea3ab5 ML |
393 | struct adma_port_priv *pp; |
394 | struct ata_queued_cmd *qc; | |
5d728824 | 395 | void __iomem *chan = ADMA_PORT_REGS(ap); |
a7dac447 | 396 | u8 status = readb(chan + ADMA_STATUS); |
edea3ab5 ML |
397 | |
398 | if (status == 0) | |
399 | continue; | |
400 | handled = 1; | |
401 | adma_enter_reg_mode(ap); | |
edea3ab5 ML |
402 | pp = ap->private_data; |
403 | if (!pp || pp->state != adma_state_pkt) | |
404 | continue; | |
9af5c9c9 | 405 | qc = ata_qc_from_tag(ap, ap->link.active_tag); |
94ec1ef1 | 406 | if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) { |
640fdb50 JG |
407 | if (status & aPERR) |
408 | qc->err_mask |= AC_ERR_HOST_BUS; | |
409 | else if ((status & (aPSD | aUIRQ))) | |
a22e2eb0 | 410 | qc->err_mask |= AC_ERR_OTHER; |
640fdb50 JG |
411 | |
412 | if (pp->pkt[0] & cATERR) | |
413 | qc->err_mask |= AC_ERR_DEV; | |
a21a84a3 | 414 | else if (pp->pkt[0] != cDONE) |
a22e2eb0 | 415 | qc->err_mask |= AC_ERR_OTHER; |
a7dac447 | 416 | |
640fdb50 JG |
417 | if (!qc->err_mask) |
418 | ata_qc_complete(qc); | |
419 | else { | |
9af5c9c9 | 420 | struct ata_eh_info *ehi = &ap->link.eh_info; |
640fdb50 JG |
421 | ata_ehi_clear_desc(ehi); |
422 | ata_ehi_push_desc(ehi, | |
423 | "ADMA-status 0x%02X", status); | |
424 | ata_ehi_push_desc(ehi, | |
425 | "pkt[0] 0x%02X", pp->pkt[0]); | |
426 | ||
427 | if (qc->err_mask == AC_ERR_DEV) | |
428 | ata_port_abort(ap); | |
429 | else | |
430 | ata_port_freeze(ap); | |
431 | } | |
a21a84a3 | 432 | } |
edea3ab5 ML |
433 | } |
434 | return handled; | |
435 | } | |
436 | ||
cca3974e | 437 | static inline unsigned int adma_intr_mmio(struct ata_host *host) |
edea3ab5 ML |
438 | { |
439 | unsigned int handled = 0, port_no; | |
440 | ||
cca3974e | 441 | for (port_no = 0; port_no < host->n_ports; ++port_no) { |
3e4ec344 TH |
442 | struct ata_port *ap = host->ports[port_no]; |
443 | struct adma_port_priv *pp = ap->private_data; | |
444 | struct ata_queued_cmd *qc; | |
445 | ||
446 | if (!pp || pp->state != adma_state_mmio) | |
447 | continue; | |
448 | qc = ata_qc_from_tag(ap, ap->link.active_tag); | |
449 | if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) { | |
450 | ||
451 | /* check main status, clearing INTRQ */ | |
452 | u8 status = ata_sff_check_status(ap); | |
453 | if ((status & ATA_BUSY)) | |
edea3ab5 | 454 | continue; |
3e4ec344 TH |
455 | |
456 | /* complete taskfile transaction */ | |
457 | pp->state = adma_state_idle; | |
458 | qc->err_mask |= ac_err_mask(status); | |
459 | if (!qc->err_mask) | |
460 | ata_qc_complete(qc); | |
461 | else { | |
462 | struct ata_eh_info *ehi = &ap->link.eh_info; | |
463 | ata_ehi_clear_desc(ehi); | |
464 | ata_ehi_push_desc(ehi, "status 0x%02X", status); | |
465 | ||
466 | if (qc->err_mask == AC_ERR_DEV) | |
467 | ata_port_abort(ap); | |
468 | else | |
469 | ata_port_freeze(ap); | |
edea3ab5 | 470 | } |
3e4ec344 | 471 | handled = 1; |
edea3ab5 ML |
472 | } |
473 | } | |
474 | return handled; | |
475 | } | |
476 | ||
7d12e780 | 477 | static irqreturn_t adma_intr(int irq, void *dev_instance) |
edea3ab5 | 478 | { |
cca3974e | 479 | struct ata_host *host = dev_instance; |
edea3ab5 ML |
480 | unsigned int handled = 0; |
481 | ||
cca3974e JG |
482 | spin_lock(&host->lock); |
483 | handled = adma_intr_pkt(host) | adma_intr_mmio(host); | |
484 | spin_unlock(&host->lock); | |
edea3ab5 | 485 | |
edea3ab5 ML |
486 | return IRQ_RETVAL(handled); |
487 | } | |
488 | ||
0d5ff566 | 489 | static void adma_ata_setup_port(struct ata_ioports *port, void __iomem *base) |
edea3ab5 ML |
490 | { |
491 | port->cmd_addr = | |
492 | port->data_addr = base + 0x000; | |
493 | port->error_addr = | |
494 | port->feature_addr = base + 0x004; | |
495 | port->nsect_addr = base + 0x008; | |
496 | port->lbal_addr = base + 0x00c; | |
497 | port->lbam_addr = base + 0x010; | |
498 | port->lbah_addr = base + 0x014; | |
499 | port->device_addr = base + 0x018; | |
500 | port->status_addr = | |
501 | port->command_addr = base + 0x01c; | |
502 | port->altstatus_addr = | |
503 | port->ctl_addr = base + 0x038; | |
504 | } | |
505 | ||
506 | static int adma_port_start(struct ata_port *ap) | |
507 | { | |
cca3974e | 508 | struct device *dev = ap->host->dev; |
edea3ab5 | 509 | struct adma_port_priv *pp; |
edea3ab5 | 510 | |
edea3ab5 | 511 | adma_enter_reg_mode(ap); |
24dc5f33 | 512 | pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL); |
edea3ab5 | 513 | if (!pp) |
24dc5f33 TH |
514 | return -ENOMEM; |
515 | pp->pkt = dmam_alloc_coherent(dev, ADMA_PKT_BYTES, &pp->pkt_dma, | |
516 | GFP_KERNEL); | |
edea3ab5 | 517 | if (!pp->pkt) |
24dc5f33 | 518 | return -ENOMEM; |
edea3ab5 ML |
519 | /* paranoia? */ |
520 | if ((pp->pkt_dma & 7) != 0) { | |
51d628f1 HR |
521 | ata_port_err(ap, "bad alignment for pp->pkt_dma: %08x\n", |
522 | (u32)pp->pkt_dma); | |
24dc5f33 | 523 | return -ENOMEM; |
edea3ab5 | 524 | } |
edea3ab5 ML |
525 | ap->private_data = pp; |
526 | adma_reinit_engine(ap); | |
527 | return 0; | |
edea3ab5 ML |
528 | } |
529 | ||
530 | static void adma_port_stop(struct ata_port *ap) | |
531 | { | |
5d728824 | 532 | adma_reset_engine(ap); |
edea3ab5 ML |
533 | } |
534 | ||
5d728824 | 535 | static void adma_host_init(struct ata_host *host, unsigned int chip_id) |
edea3ab5 ML |
536 | { |
537 | unsigned int port_no; | |
edea3ab5 ML |
538 | |
539 | /* enable/lock aGO operation */ | |
5d728824 | 540 | writeb(7, host->iomap[ADMA_MMIO_BAR] + ADMA_MODE_LOCK); |
edea3ab5 ML |
541 | |
542 | /* reset the ADMA logic */ | |
543 | for (port_no = 0; port_no < ADMA_PORTS; ++port_no) | |
5d728824 | 544 | adma_reset_engine(host->ports[port_no]); |
edea3ab5 ML |
545 | } |
546 | ||
edea3ab5 | 547 | static int adma_ata_init_one(struct pci_dev *pdev, |
0d5ff566 | 548 | const struct pci_device_id *ent) |
edea3ab5 | 549 | { |
edea3ab5 | 550 | unsigned int board_idx = (unsigned int) ent->driver_data; |
5d728824 TH |
551 | const struct ata_port_info *ppi[] = { &adma_port_info[board_idx], NULL }; |
552 | struct ata_host *host; | |
553 | void __iomem *mmio_base; | |
edea3ab5 ML |
554 | int rc, port_no; |
555 | ||
06296a1e | 556 | ata_print_version_once(&pdev->dev, DRV_VERSION); |
edea3ab5 | 557 | |
5d728824 TH |
558 | /* alloc host */ |
559 | host = ata_host_alloc_pinfo(&pdev->dev, ppi, ADMA_PORTS); | |
560 | if (!host) | |
561 | return -ENOMEM; | |
562 | ||
563 | /* acquire resources and fill host */ | |
24dc5f33 | 564 | rc = pcim_enable_device(pdev); |
edea3ab5 ML |
565 | if (rc) |
566 | return rc; | |
567 | ||
24dc5f33 TH |
568 | if ((pci_resource_flags(pdev, 4) & IORESOURCE_MEM) == 0) |
569 | return -ENODEV; | |
edea3ab5 | 570 | |
0d5ff566 TH |
571 | rc = pcim_iomap_regions(pdev, 1 << ADMA_MMIO_BAR, DRV_NAME); |
572 | if (rc) | |
573 | return rc; | |
5d728824 TH |
574 | host->iomap = pcim_iomap_table(pdev); |
575 | mmio_base = host->iomap[ADMA_MMIO_BAR]; | |
edea3ab5 | 576 | |
94c58148 CH |
577 | rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); |
578 | if (rc) { | |
579 | dev_err(&pdev->dev, "32-bit DMA enable failed\n"); | |
24dc5f33 | 580 | return rc; |
94c58148 | 581 | } |
edea3ab5 | 582 | |
cbcdd875 TH |
583 | for (port_no = 0; port_no < ADMA_PORTS; ++port_no) { |
584 | struct ata_port *ap = host->ports[port_no]; | |
585 | void __iomem *port_base = ADMA_ATA_REGS(mmio_base, port_no); | |
586 | unsigned int offset = port_base - mmio_base; | |
587 | ||
588 | adma_ata_setup_port(&ap->ioaddr, port_base); | |
589 | ||
590 | ata_port_pbar_desc(ap, ADMA_MMIO_BAR, -1, "mmio"); | |
591 | ata_port_pbar_desc(ap, ADMA_MMIO_BAR, offset, "port"); | |
592 | } | |
edea3ab5 ML |
593 | |
594 | /* initialize adapter */ | |
5d728824 | 595 | adma_host_init(host, board_idx); |
edea3ab5 | 596 | |
5d728824 TH |
597 | pci_set_master(pdev); |
598 | return ata_host_activate(host, pdev->irq, adma_intr, IRQF_SHARED, | |
599 | &adma_ata_sht); | |
edea3ab5 ML |
600 | } |
601 | ||
2fc75da0 | 602 | module_pci_driver(adma_ata_pci_driver); |
edea3ab5 ML |
603 | |
604 | MODULE_AUTHOR("Mark Lord"); | |
605 | MODULE_DESCRIPTION("Pacific Digital Corporation ADMA low-level driver"); | |
606 | MODULE_LICENSE("GPL"); | |
607 | MODULE_DEVICE_TABLE(pci, adma_ata_pci_tbl); | |
608 | MODULE_VERSION(DRV_VERSION); |