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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 | * | |
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.* | |
25 | * | |
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> | |
37 | #include <linux/pci.h> | |
38 | #include <linux/init.h> | |
39 | #include <linux/blkdev.h> | |
40 | #include <linux/delay.h> | |
41 | #include <linux/interrupt.h> | |
42 | #include <linux/device.h> | |
43 | #include <scsi/scsi_host.h> | |
44 | #include <linux/libata.h> | |
45 | ||
46 | #define DRV_NAME "pdc_adma" | |
47 | #define DRV_VERSION "0.05" | |
48 | ||
49 | /* macro to calculate base address for ATA regs */ | |
50 | #define ADMA_ATA_REGS(base,port_no) ((base) + ((port_no) * 0x40)) | |
51 | ||
52 | /* macro to calculate base address for ADMA regs */ | |
53 | #define ADMA_REGS(base,port_no) ((base) + 0x80 + ((port_no) * 0x20)) | |
54 | ||
55 | /* macro to obtain addresses from ata_host */ | |
56 | #define ADMA_HOST_REGS(host,port_no) \ | |
57 | ADMA_REGS((host)->iomap[ADMA_MMIO_BAR], port_no) | |
58 | ||
59 | enum { | |
60 | ADMA_MMIO_BAR = 4, | |
61 | ||
62 | ADMA_PORTS = 2, | |
63 | ADMA_CPB_BYTES = 40, | |
64 | ADMA_PRD_BYTES = LIBATA_MAX_PRD * 16, | |
65 | ADMA_PKT_BYTES = ADMA_CPB_BYTES + ADMA_PRD_BYTES, | |
66 | ||
67 | ADMA_DMA_BOUNDARY = 0xffffffff, | |
68 | ||
69 | /* global register offsets */ | |
70 | ADMA_MODE_LOCK = 0x00c7, | |
71 | ||
72 | /* per-channel register offsets */ | |
73 | ADMA_CONTROL = 0x0000, /* ADMA control */ | |
74 | ADMA_STATUS = 0x0002, /* ADMA status */ | |
75 | ADMA_CPB_COUNT = 0x0004, /* CPB count */ | |
76 | ADMA_CPB_CURRENT = 0x000c, /* current CPB address */ | |
77 | ADMA_CPB_NEXT = 0x000c, /* next CPB address */ | |
78 | ADMA_CPB_LOOKUP = 0x0010, /* CPB lookup table */ | |
79 | ADMA_FIFO_IN = 0x0014, /* input FIFO threshold */ | |
80 | ADMA_FIFO_OUT = 0x0016, /* output FIFO threshold */ | |
81 | ||
82 | /* ADMA_CONTROL register bits */ | |
83 | aNIEN = (1 << 8), /* irq mask: 1==masked */ | |
84 | aGO = (1 << 7), /* packet trigger ("Go!") */ | |
85 | aRSTADM = (1 << 5), /* ADMA logic reset */ | |
86 | aPIOMD4 = 0x0003, /* PIO mode 4 */ | |
87 | ||
88 | /* ADMA_STATUS register bits */ | |
89 | aPSD = (1 << 6), | |
90 | aUIRQ = (1 << 4), | |
91 | aPERR = (1 << 0), | |
92 | ||
93 | /* CPB bits */ | |
94 | cDONE = (1 << 0), | |
95 | cVLD = (1 << 0), | |
96 | cDAT = (1 << 2), | |
97 | cIEN = (1 << 3), | |
98 | ||
99 | /* PRD bits */ | |
100 | pORD = (1 << 4), | |
101 | pDIRO = (1 << 5), | |
102 | pEND = (1 << 7), | |
103 | ||
104 | /* ATA register flags */ | |
105 | rIGN = (1 << 5), | |
106 | rEND = (1 << 7), | |
107 | ||
108 | /* ATA register addresses */ | |
109 | ADMA_REGS_CONTROL = 0x0e, | |
110 | ADMA_REGS_SECTOR_COUNT = 0x12, | |
111 | ADMA_REGS_LBA_LOW = 0x13, | |
112 | ADMA_REGS_LBA_MID = 0x14, | |
113 | ADMA_REGS_LBA_HIGH = 0x15, | |
114 | ADMA_REGS_DEVICE = 0x16, | |
115 | ADMA_REGS_COMMAND = 0x17, | |
116 | ||
117 | /* PCI device IDs */ | |
118 | board_1841_idx = 0, /* ADMA 2-port controller */ | |
119 | }; | |
120 | ||
121 | typedef enum { adma_state_idle, adma_state_pkt, adma_state_mmio } adma_state_t; | |
122 | ||
123 | struct adma_port_priv { | |
124 | u8 *pkt; | |
125 | dma_addr_t pkt_dma; | |
126 | adma_state_t state; | |
127 | }; | |
128 | ||
129 | static int adma_ata_init_one (struct pci_dev *pdev, | |
130 | const struct pci_device_id *ent); | |
131 | static irqreturn_t adma_intr (int irq, void *dev_instance); | |
132 | static int adma_port_start(struct ata_port *ap); | |
133 | static void adma_host_stop(struct ata_host *host); | |
134 | static void adma_port_stop(struct ata_port *ap); | |
135 | static void adma_phy_reset(struct ata_port *ap); | |
136 | static void adma_qc_prep(struct ata_queued_cmd *qc); | |
137 | static unsigned int adma_qc_issue(struct ata_queued_cmd *qc); | |
138 | static int adma_check_atapi_dma(struct ata_queued_cmd *qc); | |
139 | static void adma_bmdma_stop(struct ata_queued_cmd *qc); | |
140 | static u8 adma_bmdma_status(struct ata_port *ap); | |
141 | static void adma_irq_clear(struct ata_port *ap); | |
142 | static void adma_eng_timeout(struct ata_port *ap); | |
143 | ||
144 | static struct scsi_host_template adma_ata_sht = { | |
145 | .module = THIS_MODULE, | |
146 | .name = DRV_NAME, | |
147 | .ioctl = ata_scsi_ioctl, | |
148 | .queuecommand = ata_scsi_queuecmd, | |
149 | .can_queue = ATA_DEF_QUEUE, | |
150 | .this_id = ATA_SHT_THIS_ID, | |
151 | .sg_tablesize = LIBATA_MAX_PRD, | |
152 | .cmd_per_lun = ATA_SHT_CMD_PER_LUN, | |
153 | .emulated = ATA_SHT_EMULATED, | |
154 | .use_clustering = ENABLE_CLUSTERING, | |
155 | .proc_name = DRV_NAME, | |
156 | .dma_boundary = ADMA_DMA_BOUNDARY, | |
157 | .slave_configure = ata_scsi_slave_config, | |
158 | .slave_destroy = ata_scsi_slave_destroy, | |
159 | .bios_param = ata_std_bios_param, | |
160 | }; | |
161 | ||
162 | static const struct ata_port_operations adma_ata_ops = { | |
163 | .port_disable = ata_port_disable, | |
164 | .tf_load = ata_tf_load, | |
165 | .tf_read = ata_tf_read, | |
166 | .check_status = ata_check_status, | |
167 | .check_atapi_dma = adma_check_atapi_dma, | |
168 | .exec_command = ata_exec_command, | |
169 | .dev_select = ata_std_dev_select, | |
170 | .phy_reset = adma_phy_reset, | |
171 | .qc_prep = adma_qc_prep, | |
172 | .qc_issue = adma_qc_issue, | |
173 | .eng_timeout = adma_eng_timeout, | |
174 | .data_xfer = ata_data_xfer, | |
175 | .irq_handler = adma_intr, | |
176 | .irq_clear = adma_irq_clear, | |
177 | .irq_on = ata_irq_on, | |
178 | .irq_ack = ata_irq_ack, | |
179 | .port_start = adma_port_start, | |
180 | .port_stop = adma_port_stop, | |
181 | .host_stop = adma_host_stop, | |
182 | .bmdma_stop = adma_bmdma_stop, | |
183 | .bmdma_status = adma_bmdma_status, | |
184 | }; | |
185 | ||
186 | static struct ata_port_info adma_port_info[] = { | |
187 | /* board_1841_idx */ | |
188 | { | |
189 | .sht = &adma_ata_sht, | |
190 | .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST | | |
191 | ATA_FLAG_NO_LEGACY | ATA_FLAG_MMIO | | |
192 | ATA_FLAG_PIO_POLLING, | |
193 | .pio_mask = 0x10, /* pio4 */ | |
194 | .udma_mask = 0x1f, /* udma0-4 */ | |
195 | .port_ops = &adma_ata_ops, | |
196 | }, | |
197 | }; | |
198 | ||
199 | static const struct pci_device_id adma_ata_pci_tbl[] = { | |
200 | { PCI_VDEVICE(PDC, 0x1841), board_1841_idx }, | |
201 | ||
202 | { } /* terminate list */ | |
203 | }; | |
204 | ||
205 | static struct pci_driver adma_ata_pci_driver = { | |
206 | .name = DRV_NAME, | |
207 | .id_table = adma_ata_pci_tbl, | |
208 | .probe = adma_ata_init_one, | |
209 | .remove = ata_pci_remove_one, | |
210 | }; | |
211 | ||
212 | static int adma_check_atapi_dma(struct ata_queued_cmd *qc) | |
213 | { | |
214 | return 1; /* ATAPI DMA not yet supported */ | |
215 | } | |
216 | ||
217 | static void adma_bmdma_stop(struct ata_queued_cmd *qc) | |
218 | { | |
219 | /* nothing */ | |
220 | } | |
221 | ||
222 | static u8 adma_bmdma_status(struct ata_port *ap) | |
223 | { | |
224 | return 0; | |
225 | } | |
226 | ||
227 | static void adma_irq_clear(struct ata_port *ap) | |
228 | { | |
229 | /* nothing */ | |
230 | } | |
231 | ||
232 | static void adma_reset_engine(void __iomem *chan) | |
233 | { | |
234 | /* reset ADMA to idle state */ | |
235 | writew(aPIOMD4 | aNIEN | aRSTADM, chan + ADMA_CONTROL); | |
236 | udelay(2); | |
237 | writew(aPIOMD4, chan + ADMA_CONTROL); | |
238 | udelay(2); | |
239 | } | |
240 | ||
241 | static void adma_reinit_engine(struct ata_port *ap) | |
242 | { | |
243 | struct adma_port_priv *pp = ap->private_data; | |
244 | void __iomem *chan = ADMA_HOST_REGS(ap->host, ap->port_no); | |
245 | ||
246 | /* mask/clear ATA interrupts */ | |
247 | writeb(ATA_NIEN, ap->ioaddr.ctl_addr); | |
248 | ata_check_status(ap); | |
249 | ||
250 | /* reset the ADMA engine */ | |
251 | adma_reset_engine(chan); | |
252 | ||
253 | /* set in-FIFO threshold to 0x100 */ | |
254 | writew(0x100, chan + ADMA_FIFO_IN); | |
255 | ||
256 | /* set CPB pointer */ | |
257 | writel((u32)pp->pkt_dma, chan + ADMA_CPB_NEXT); | |
258 | ||
259 | /* set out-FIFO threshold to 0x100 */ | |
260 | writew(0x100, chan + ADMA_FIFO_OUT); | |
261 | ||
262 | /* set CPB count */ | |
263 | writew(1, chan + ADMA_CPB_COUNT); | |
264 | ||
265 | /* read/discard ADMA status */ | |
266 | readb(chan + ADMA_STATUS); | |
267 | } | |
268 | ||
269 | static inline void adma_enter_reg_mode(struct ata_port *ap) | |
270 | { | |
271 | void __iomem *chan = ADMA_HOST_REGS(ap->host, ap->port_no); | |
272 | ||
273 | writew(aPIOMD4, chan + ADMA_CONTROL); | |
274 | readb(chan + ADMA_STATUS); /* flush */ | |
275 | } | |
276 | ||
277 | static void adma_phy_reset(struct ata_port *ap) | |
278 | { | |
279 | struct adma_port_priv *pp = ap->private_data; | |
280 | ||
281 | pp->state = adma_state_idle; | |
282 | adma_reinit_engine(ap); | |
283 | ata_port_probe(ap); | |
284 | ata_bus_reset(ap); | |
285 | } | |
286 | ||
287 | static void adma_eng_timeout(struct ata_port *ap) | |
288 | { | |
289 | struct adma_port_priv *pp = ap->private_data; | |
290 | ||
291 | if (pp->state != adma_state_idle) /* healthy paranoia */ | |
292 | pp->state = adma_state_mmio; | |
293 | adma_reinit_engine(ap); | |
294 | ata_eng_timeout(ap); | |
295 | } | |
296 | ||
297 | static int adma_fill_sg(struct ata_queued_cmd *qc) | |
298 | { | |
299 | struct scatterlist *sg; | |
300 | struct ata_port *ap = qc->ap; | |
301 | struct adma_port_priv *pp = ap->private_data; | |
302 | u8 *buf = pp->pkt; | |
303 | int i = (2 + buf[3]) * 8; | |
304 | u8 pFLAGS = pORD | ((qc->tf.flags & ATA_TFLAG_WRITE) ? pDIRO : 0); | |
305 | ||
306 | ata_for_each_sg(sg, qc) { | |
307 | u32 addr; | |
308 | u32 len; | |
309 | ||
310 | addr = (u32)sg_dma_address(sg); | |
311 | *(__le32 *)(buf + i) = cpu_to_le32(addr); | |
312 | i += 4; | |
313 | ||
314 | len = sg_dma_len(sg) >> 3; | |
315 | *(__le32 *)(buf + i) = cpu_to_le32(len); | |
316 | i += 4; | |
317 | ||
318 | if (ata_sg_is_last(sg, qc)) | |
319 | pFLAGS |= pEND; | |
320 | buf[i++] = pFLAGS; | |
321 | buf[i++] = qc->dev->dma_mode & 0xf; | |
322 | buf[i++] = 0; /* pPKLW */ | |
323 | buf[i++] = 0; /* reserved */ | |
324 | ||
325 | *(__le32 *)(buf + i) | |
326 | = (pFLAGS & pEND) ? 0 : cpu_to_le32(pp->pkt_dma + i + 4); | |
327 | i += 4; | |
328 | ||
329 | VPRINTK("PRD[%u] = (0x%lX, 0x%X)\n", i/4, | |
330 | (unsigned long)addr, len); | |
331 | } | |
332 | return i; | |
333 | } | |
334 | ||
335 | static void adma_qc_prep(struct ata_queued_cmd *qc) | |
336 | { | |
337 | struct adma_port_priv *pp = qc->ap->private_data; | |
338 | u8 *buf = pp->pkt; | |
339 | u32 pkt_dma = (u32)pp->pkt_dma; | |
340 | int i = 0; | |
341 | ||
342 | VPRINTK("ENTER\n"); | |
343 | ||
344 | adma_enter_reg_mode(qc->ap); | |
345 | if (qc->tf.protocol != ATA_PROT_DMA) { | |
346 | ata_qc_prep(qc); | |
347 | return; | |
348 | } | |
349 | ||
350 | buf[i++] = 0; /* Response flags */ | |
351 | buf[i++] = 0; /* reserved */ | |
352 | buf[i++] = cVLD | cDAT | cIEN; | |
353 | i++; /* cLEN, gets filled in below */ | |
354 | ||
355 | *(__le32 *)(buf+i) = cpu_to_le32(pkt_dma); /* cNCPB */ | |
356 | i += 4; /* cNCPB */ | |
357 | i += 4; /* cPRD, gets filled in below */ | |
358 | ||
359 | buf[i++] = 0; /* reserved */ | |
360 | buf[i++] = 0; /* reserved */ | |
361 | buf[i++] = 0; /* reserved */ | |
362 | buf[i++] = 0; /* reserved */ | |
363 | ||
364 | /* ATA registers; must be a multiple of 4 */ | |
365 | buf[i++] = qc->tf.device; | |
366 | buf[i++] = ADMA_REGS_DEVICE; | |
367 | if ((qc->tf.flags & ATA_TFLAG_LBA48)) { | |
368 | buf[i++] = qc->tf.hob_nsect; | |
369 | buf[i++] = ADMA_REGS_SECTOR_COUNT; | |
370 | buf[i++] = qc->tf.hob_lbal; | |
371 | buf[i++] = ADMA_REGS_LBA_LOW; | |
372 | buf[i++] = qc->tf.hob_lbam; | |
373 | buf[i++] = ADMA_REGS_LBA_MID; | |
374 | buf[i++] = qc->tf.hob_lbah; | |
375 | buf[i++] = ADMA_REGS_LBA_HIGH; | |
376 | } | |
377 | buf[i++] = qc->tf.nsect; | |
378 | buf[i++] = ADMA_REGS_SECTOR_COUNT; | |
379 | buf[i++] = qc->tf.lbal; | |
380 | buf[i++] = ADMA_REGS_LBA_LOW; | |
381 | buf[i++] = qc->tf.lbam; | |
382 | buf[i++] = ADMA_REGS_LBA_MID; | |
383 | buf[i++] = qc->tf.lbah; | |
384 | buf[i++] = ADMA_REGS_LBA_HIGH; | |
385 | buf[i++] = 0; | |
386 | buf[i++] = ADMA_REGS_CONTROL; | |
387 | buf[i++] = rIGN; | |
388 | buf[i++] = 0; | |
389 | buf[i++] = qc->tf.command; | |
390 | buf[i++] = ADMA_REGS_COMMAND | rEND; | |
391 | ||
392 | buf[3] = (i >> 3) - 2; /* cLEN */ | |
393 | *(__le32 *)(buf+8) = cpu_to_le32(pkt_dma + i); /* cPRD */ | |
394 | ||
395 | i = adma_fill_sg(qc); | |
396 | wmb(); /* flush PRDs and pkt to memory */ | |
397 | #if 0 | |
398 | /* dump out CPB + PRDs for debug */ | |
399 | { | |
400 | int j, len = 0; | |
401 | static char obuf[2048]; | |
402 | for (j = 0; j < i; ++j) { | |
403 | len += sprintf(obuf+len, "%02x ", buf[j]); | |
404 | if ((j & 7) == 7) { | |
405 | printk("%s\n", obuf); | |
406 | len = 0; | |
407 | } | |
408 | } | |
409 | if (len) | |
410 | printk("%s\n", obuf); | |
411 | } | |
412 | #endif | |
413 | } | |
414 | ||
415 | static inline void adma_packet_start(struct ata_queued_cmd *qc) | |
416 | { | |
417 | struct ata_port *ap = qc->ap; | |
418 | void __iomem *chan = ADMA_HOST_REGS(ap->host, ap->port_no); | |
419 | ||
420 | VPRINTK("ENTER, ap %p\n", ap); | |
421 | ||
422 | /* fire up the ADMA engine */ | |
423 | writew(aPIOMD4 | aGO, chan + ADMA_CONTROL); | |
424 | } | |
425 | ||
426 | static unsigned int adma_qc_issue(struct ata_queued_cmd *qc) | |
427 | { | |
428 | struct adma_port_priv *pp = qc->ap->private_data; | |
429 | ||
430 | switch (qc->tf.protocol) { | |
431 | case ATA_PROT_DMA: | |
432 | pp->state = adma_state_pkt; | |
433 | adma_packet_start(qc); | |
434 | return 0; | |
435 | ||
436 | case ATA_PROT_ATAPI_DMA: | |
437 | BUG(); | |
438 | break; | |
439 | ||
440 | default: | |
441 | break; | |
442 | } | |
443 | ||
444 | pp->state = adma_state_mmio; | |
445 | return ata_qc_issue_prot(qc); | |
446 | } | |
447 | ||
448 | static inline unsigned int adma_intr_pkt(struct ata_host *host) | |
449 | { | |
450 | unsigned int handled = 0, port_no; | |
451 | ||
452 | for (port_no = 0; port_no < host->n_ports; ++port_no) { | |
453 | struct ata_port *ap = host->ports[port_no]; | |
454 | struct adma_port_priv *pp; | |
455 | struct ata_queued_cmd *qc; | |
456 | void __iomem *chan = ADMA_HOST_REGS(host, port_no); | |
457 | u8 status = readb(chan + ADMA_STATUS); | |
458 | ||
459 | if (status == 0) | |
460 | continue; | |
461 | handled = 1; | |
462 | adma_enter_reg_mode(ap); | |
463 | if (ap->flags & ATA_FLAG_DISABLED) | |
464 | continue; | |
465 | pp = ap->private_data; | |
466 | if (!pp || pp->state != adma_state_pkt) | |
467 | continue; | |
468 | qc = ata_qc_from_tag(ap, ap->active_tag); | |
469 | if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) { | |
470 | if ((status & (aPERR | aPSD | aUIRQ))) | |
471 | qc->err_mask |= AC_ERR_OTHER; | |
472 | else if (pp->pkt[0] != cDONE) | |
473 | qc->err_mask |= AC_ERR_OTHER; | |
474 | ||
475 | ata_qc_complete(qc); | |
476 | } | |
477 | } | |
478 | return handled; | |
479 | } | |
480 | ||
481 | static inline unsigned int adma_intr_mmio(struct ata_host *host) | |
482 | { | |
483 | unsigned int handled = 0, port_no; | |
484 | ||
485 | for (port_no = 0; port_no < host->n_ports; ++port_no) { | |
486 | struct ata_port *ap; | |
487 | ap = host->ports[port_no]; | |
488 | if (ap && (!(ap->flags & ATA_FLAG_DISABLED))) { | |
489 | struct ata_queued_cmd *qc; | |
490 | struct adma_port_priv *pp = ap->private_data; | |
491 | if (!pp || pp->state != adma_state_mmio) | |
492 | continue; | |
493 | qc = ata_qc_from_tag(ap, ap->active_tag); | |
494 | if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) { | |
495 | ||
496 | /* check main status, clearing INTRQ */ | |
497 | u8 status = ata_check_status(ap); | |
498 | if ((status & ATA_BUSY)) | |
499 | continue; | |
500 | DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n", | |
501 | ap->print_id, qc->tf.protocol, status); | |
502 | ||
503 | /* complete taskfile transaction */ | |
504 | pp->state = adma_state_idle; | |
505 | qc->err_mask |= ac_err_mask(status); | |
506 | ata_qc_complete(qc); | |
507 | handled = 1; | |
508 | } | |
509 | } | |
510 | } | |
511 | return handled; | |
512 | } | |
513 | ||
514 | static irqreturn_t adma_intr(int irq, void *dev_instance) | |
515 | { | |
516 | struct ata_host *host = dev_instance; | |
517 | unsigned int handled = 0; | |
518 | ||
519 | VPRINTK("ENTER\n"); | |
520 | ||
521 | spin_lock(&host->lock); | |
522 | handled = adma_intr_pkt(host) | adma_intr_mmio(host); | |
523 | spin_unlock(&host->lock); | |
524 | ||
525 | VPRINTK("EXIT\n"); | |
526 | ||
527 | return IRQ_RETVAL(handled); | |
528 | } | |
529 | ||
530 | static void adma_ata_setup_port(struct ata_ioports *port, void __iomem *base) | |
531 | { | |
532 | port->cmd_addr = | |
533 | port->data_addr = base + 0x000; | |
534 | port->error_addr = | |
535 | port->feature_addr = base + 0x004; | |
536 | port->nsect_addr = base + 0x008; | |
537 | port->lbal_addr = base + 0x00c; | |
538 | port->lbam_addr = base + 0x010; | |
539 | port->lbah_addr = base + 0x014; | |
540 | port->device_addr = base + 0x018; | |
541 | port->status_addr = | |
542 | port->command_addr = base + 0x01c; | |
543 | port->altstatus_addr = | |
544 | port->ctl_addr = base + 0x038; | |
545 | } | |
546 | ||
547 | static int adma_port_start(struct ata_port *ap) | |
548 | { | |
549 | struct device *dev = ap->host->dev; | |
550 | struct adma_port_priv *pp; | |
551 | int rc; | |
552 | ||
553 | rc = ata_port_start(ap); | |
554 | if (rc) | |
555 | return rc; | |
556 | adma_enter_reg_mode(ap); | |
557 | pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL); | |
558 | if (!pp) | |
559 | return -ENOMEM; | |
560 | pp->pkt = dmam_alloc_coherent(dev, ADMA_PKT_BYTES, &pp->pkt_dma, | |
561 | GFP_KERNEL); | |
562 | if (!pp->pkt) | |
563 | return -ENOMEM; | |
564 | /* paranoia? */ | |
565 | if ((pp->pkt_dma & 7) != 0) { | |
566 | printk("bad alignment for pp->pkt_dma: %08x\n", | |
567 | (u32)pp->pkt_dma); | |
568 | return -ENOMEM; | |
569 | } | |
570 | memset(pp->pkt, 0, ADMA_PKT_BYTES); | |
571 | ap->private_data = pp; | |
572 | adma_reinit_engine(ap); | |
573 | return 0; | |
574 | } | |
575 | ||
576 | static void adma_port_stop(struct ata_port *ap) | |
577 | { | |
578 | adma_reset_engine(ADMA_HOST_REGS(ap->host, ap->port_no)); | |
579 | } | |
580 | ||
581 | static void adma_host_stop(struct ata_host *host) | |
582 | { | |
583 | unsigned int port_no; | |
584 | ||
585 | for (port_no = 0; port_no < ADMA_PORTS; ++port_no) | |
586 | adma_reset_engine(ADMA_HOST_REGS(host, port_no)); | |
587 | } | |
588 | ||
589 | static void adma_host_init(unsigned int chip_id, | |
590 | struct ata_probe_ent *probe_ent) | |
591 | { | |
592 | unsigned int port_no; | |
593 | void __iomem *mmio_base = probe_ent->iomap[ADMA_MMIO_BAR]; | |
594 | ||
595 | /* enable/lock aGO operation */ | |
596 | writeb(7, mmio_base + ADMA_MODE_LOCK); | |
597 | ||
598 | /* reset the ADMA logic */ | |
599 | for (port_no = 0; port_no < ADMA_PORTS; ++port_no) | |
600 | adma_reset_engine(ADMA_REGS(mmio_base, port_no)); | |
601 | } | |
602 | ||
603 | static int adma_set_dma_masks(struct pci_dev *pdev, void __iomem *mmio_base) | |
604 | { | |
605 | int rc; | |
606 | ||
607 | rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK); | |
608 | if (rc) { | |
609 | dev_printk(KERN_ERR, &pdev->dev, | |
610 | "32-bit DMA enable failed\n"); | |
611 | return rc; | |
612 | } | |
613 | rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); | |
614 | if (rc) { | |
615 | dev_printk(KERN_ERR, &pdev->dev, | |
616 | "32-bit consistent DMA enable failed\n"); | |
617 | return rc; | |
618 | } | |
619 | return 0; | |
620 | } | |
621 | ||
622 | static int adma_ata_init_one(struct pci_dev *pdev, | |
623 | const struct pci_device_id *ent) | |
624 | { | |
625 | static int printed_version; | |
626 | struct ata_probe_ent *probe_ent = NULL; | |
627 | void __iomem *mmio_base; | |
628 | unsigned int board_idx = (unsigned int) ent->driver_data; | |
629 | int rc, port_no; | |
630 | ||
631 | if (!printed_version++) | |
632 | dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n"); | |
633 | ||
634 | rc = pcim_enable_device(pdev); | |
635 | if (rc) | |
636 | return rc; | |
637 | ||
638 | if ((pci_resource_flags(pdev, 4) & IORESOURCE_MEM) == 0) | |
639 | return -ENODEV; | |
640 | ||
641 | rc = pcim_iomap_regions(pdev, 1 << ADMA_MMIO_BAR, DRV_NAME); | |
642 | if (rc) | |
643 | return rc; | |
644 | mmio_base = pcim_iomap_table(pdev)[ADMA_MMIO_BAR]; | |
645 | ||
646 | rc = adma_set_dma_masks(pdev, mmio_base); | |
647 | if (rc) | |
648 | return rc; | |
649 | ||
650 | probe_ent = devm_kzalloc(&pdev->dev, sizeof(*probe_ent), GFP_KERNEL); | |
651 | if (probe_ent == NULL) | |
652 | return -ENOMEM; | |
653 | ||
654 | probe_ent->dev = pci_dev_to_dev(pdev); | |
655 | INIT_LIST_HEAD(&probe_ent->node); | |
656 | ||
657 | probe_ent->sht = adma_port_info[board_idx].sht; | |
658 | probe_ent->port_flags = adma_port_info[board_idx].flags; | |
659 | probe_ent->pio_mask = adma_port_info[board_idx].pio_mask; | |
660 | probe_ent->mwdma_mask = adma_port_info[board_idx].mwdma_mask; | |
661 | probe_ent->udma_mask = adma_port_info[board_idx].udma_mask; | |
662 | probe_ent->port_ops = adma_port_info[board_idx].port_ops; | |
663 | ||
664 | probe_ent->irq = pdev->irq; | |
665 | probe_ent->irq_flags = IRQF_SHARED; | |
666 | probe_ent->n_ports = ADMA_PORTS; | |
667 | probe_ent->iomap = pcim_iomap_table(pdev); | |
668 | ||
669 | for (port_no = 0; port_no < probe_ent->n_ports; ++port_no) { | |
670 | adma_ata_setup_port(&probe_ent->port[port_no], | |
671 | ADMA_ATA_REGS(mmio_base, port_no)); | |
672 | } | |
673 | ||
674 | pci_set_master(pdev); | |
675 | ||
676 | /* initialize adapter */ | |
677 | adma_host_init(board_idx, probe_ent); | |
678 | ||
679 | if (!ata_device_add(probe_ent)) | |
680 | return -ENODEV; | |
681 | ||
682 | devm_kfree(&pdev->dev, probe_ent); | |
683 | return 0; | |
684 | } | |
685 | ||
686 | static int __init adma_ata_init(void) | |
687 | { | |
688 | return pci_register_driver(&adma_ata_pci_driver); | |
689 | } | |
690 | ||
691 | static void __exit adma_ata_exit(void) | |
692 | { | |
693 | pci_unregister_driver(&adma_ata_pci_driver); | |
694 | } | |
695 | ||
696 | MODULE_AUTHOR("Mark Lord"); | |
697 | MODULE_DESCRIPTION("Pacific Digital Corporation ADMA low-level driver"); | |
698 | MODULE_LICENSE("GPL"); | |
699 | MODULE_DEVICE_TABLE(pci, adma_ata_pci_tbl); | |
700 | MODULE_VERSION(DRV_VERSION); | |
701 | ||
702 | module_init(adma_ata_init); | |
703 | module_exit(adma_ata_exit); |