1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Libata based driver for Apple "macio" family of PATA controllers
4 *
5 * Copyright 2008/2009 Benjamin Herrenschmidt, IBM Corp
6 * <benh@kernel.crashing.org>
7 *
8 * Some bits and pieces from drivers/ide/ppc/pmac.c
9 *
10 */
11
12 #undef DEBUG
13 #undef DEBUG_DMA
14
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/init.h>
18 #include <linux/blkdev.h>
19 #include <linux/ata.h>
20 #include <linux/libata.h>
21 #include <linux/adb.h>
22 #include <linux/pmu.h>
23 #include <linux/scatterlist.h>
24 #include <linux/irqdomain.h>
25 #include <linux/of.h>
26 #include <linux/gfp.h>
27 #include <linux/pci.h>
28
29 #include <scsi/scsi.h>
30 #include <scsi/scsi_host.h>
31 #include <scsi/scsi_device.h>
32
33 #include <asm/macio.h>
34 #include <asm/io.h>
35 #include <asm/dbdma.h>
36 #include <asm/machdep.h>
37 #include <asm/pmac_feature.h>
38 #include <asm/mediabay.h>
39
40 #ifdef DEBUG_DMA
41 #define dev_dbgdma(dev, format, arg...) \
42 dev_printk(KERN_DEBUG , dev , format , ## arg)
43 #else
44 #define dev_dbgdma(dev, format, arg...) \
45 ({ if (0) dev_printk(KERN_DEBUG, dev, format, ##arg); 0; })
46 #endif
47
48 #define DRV_NAME "pata_macio"
49 #define DRV_VERSION "0.9"
50
51 /* Models of macio ATA controller */
52 enum {
53 controller_ohare, /* OHare based */
54 controller_heathrow, /* Heathrow/Paddington */
55 controller_kl_ata3, /* KeyLargo ATA-3 */
56 controller_kl_ata4, /* KeyLargo ATA-4 */
57 controller_un_ata6, /* UniNorth2 ATA-6 */
58 controller_k2_ata6, /* K2 ATA-6 */
59 controller_sh_ata6, /* Shasta ATA-6 */
60 };
61
62 static const char* macio_ata_names[] = {
63 "OHare ATA", /* OHare based */
64 "Heathrow ATA", /* Heathrow/Paddington */
65 "KeyLargo ATA-3", /* KeyLargo ATA-3 (MDMA only) */
66 "KeyLargo ATA-4", /* KeyLargo ATA-4 (UDMA/66) */
67 "UniNorth ATA-6", /* UniNorth2 ATA-6 (UDMA/100) */
68 "K2 ATA-6", /* K2 ATA-6 (UDMA/100) */
69 "Shasta ATA-6", /* Shasta ATA-6 (UDMA/133) */
70 };
71
72 /*
73 * Extra registers, both 32-bit little-endian
74 */
75 #define IDE_TIMING_CONFIG 0x200
76 #define IDE_INTERRUPT 0x300
77
78 /* Kauai (U2) ATA has different register setup */
79 #define IDE_KAUAI_PIO_CONFIG 0x200
80 #define IDE_KAUAI_ULTRA_CONFIG 0x210
81 #define IDE_KAUAI_POLL_CONFIG 0x220
82
83 /*
84 * Timing configuration register definitions
85 */
86
87 /* Number of IDE_SYSCLK_NS ticks, argument is in nanoseconds */
88 #define SYSCLK_TICKS(t) (((t) + IDE_SYSCLK_NS - 1) / IDE_SYSCLK_NS)
89 #define SYSCLK_TICKS_66(t) (((t) + IDE_SYSCLK_66_NS - 1) / IDE_SYSCLK_66_NS)
90 #define IDE_SYSCLK_NS 30 /* 33Mhz cell */
91 #define IDE_SYSCLK_66_NS 15 /* 66Mhz cell */
92
93 /* 133Mhz cell, found in shasta.
94 * See comments about 100 Mhz Uninorth 2...
95 * Note that PIO_MASK and MDMA_MASK seem to overlap, that's just
96 * weird and I don't now why .. at this stage
97 */
98 #define TR_133_PIOREG_PIO_MASK 0xff000fff
99 #define TR_133_PIOREG_MDMA_MASK 0x00fff800
100 #define TR_133_UDMAREG_UDMA_MASK 0x0003ffff
101 #define TR_133_UDMAREG_UDMA_EN 0x00000001
102
103 /* 100Mhz cell, found in Uninorth 2 and K2. It appears as a pci device
104 * (106b/0033) on uninorth or K2 internal PCI bus and it's clock is
105 * controlled like gem or fw. It appears to be an evolution of keylargo
106 * ATA4 with a timing register extended to 2x32bits registers (one
107 * for PIO & MWDMA and one for UDMA, and a similar DBDMA channel.
108 * It has it's own local feature control register as well.
109 *
110 * After scratching my mind over the timing values, at least for PIO
111 * and MDMA, I think I've figured the format of the timing register,
112 * though I use pre-calculated tables for UDMA as usual...
113 */
114 #define TR_100_PIO_ADDRSETUP_MASK 0xff000000 /* Size of field unknown */
115 #define TR_100_PIO_ADDRSETUP_SHIFT 24
116 #define TR_100_MDMA_MASK 0x00fff000
117 #define TR_100_MDMA_RECOVERY_MASK 0x00fc0000
118 #define TR_100_MDMA_RECOVERY_SHIFT 18
119 #define TR_100_MDMA_ACCESS_MASK 0x0003f000
120 #define TR_100_MDMA_ACCESS_SHIFT 12
121 #define TR_100_PIO_MASK 0xff000fff
122 #define TR_100_PIO_RECOVERY_MASK 0x00000fc0
123 #define TR_100_PIO_RECOVERY_SHIFT 6
124 #define TR_100_PIO_ACCESS_MASK 0x0000003f
125 #define TR_100_PIO_ACCESS_SHIFT 0
126
127 #define TR_100_UDMAREG_UDMA_MASK 0x0000ffff
128 #define TR_100_UDMAREG_UDMA_EN 0x00000001
129
130
131 /* 66Mhz cell, found in KeyLargo. Can do ultra mode 0 to 2 on
132 * 40 connector cable and to 4 on 80 connector one.
133 * Clock unit is 15ns (66Mhz)
134 *
135 * 3 Values can be programmed:
136 * - Write data setup, which appears to match the cycle time. They
137 * also call it DIOW setup.
138 * - Ready to pause time (from spec)
139 * - Address setup. That one is weird. I don't see where exactly
140 * it fits in UDMA cycles, I got it's name from an obscure piece
141 * of commented out code in Darwin. They leave it to 0, we do as
142 * well, despite a comment that would lead to think it has a
143 * min value of 45ns.
144 * Apple also add 60ns to the write data setup (or cycle time ?) on
145 * reads.
146 */
147 #define TR_66_UDMA_MASK 0xfff00000
148 #define TR_66_UDMA_EN 0x00100000 /* Enable Ultra mode for DMA */
149 #define TR_66_PIO_ADDRSETUP_MASK 0xe0000000 /* Address setup */
150 #define TR_66_PIO_ADDRSETUP_SHIFT 29
151 #define TR_66_UDMA_RDY2PAUS_MASK 0x1e000000 /* Ready 2 pause time */
152 #define TR_66_UDMA_RDY2PAUS_SHIFT 25
153 #define TR_66_UDMA_WRDATASETUP_MASK 0x01e00000 /* Write data setup time */
154 #define TR_66_UDMA_WRDATASETUP_SHIFT 21
155 #define TR_66_MDMA_MASK 0x000ffc00
156 #define TR_66_MDMA_RECOVERY_MASK 0x000f8000
157 #define TR_66_MDMA_RECOVERY_SHIFT 15
158 #define TR_66_MDMA_ACCESS_MASK 0x00007c00
159 #define TR_66_MDMA_ACCESS_SHIFT 10
160 #define TR_66_PIO_MASK 0xe00003ff
161 #define TR_66_PIO_RECOVERY_MASK 0x000003e0
162 #define TR_66_PIO_RECOVERY_SHIFT 5
163 #define TR_66_PIO_ACCESS_MASK 0x0000001f
164 #define TR_66_PIO_ACCESS_SHIFT 0
165
166 /* 33Mhz cell, found in OHare, Heathrow (& Paddington) and KeyLargo
167 * Can do pio & mdma modes, clock unit is 30ns (33Mhz)
168 *
169 * The access time and recovery time can be programmed. Some older
170 * Darwin code base limit OHare to 150ns cycle time. I decided to do
171 * the same here fore safety against broken old hardware ;)
172 * The HalfTick bit, when set, adds half a clock (15ns) to the access
173 * time and removes one from recovery. It's not supported on KeyLargo
174 * implementation afaik. The E bit appears to be set for PIO mode 0 and
175 * is used to reach long timings used in this mode.
176 */
177 #define TR_33_MDMA_MASK 0x003ff800
178 #define TR_33_MDMA_RECOVERY_MASK 0x001f0000
179 #define TR_33_MDMA_RECOVERY_SHIFT 16
180 #define TR_33_MDMA_ACCESS_MASK 0x0000f800
181 #define TR_33_MDMA_ACCESS_SHIFT 11
182 #define TR_33_MDMA_HALFTICK 0x00200000
183 #define TR_33_PIO_MASK 0x000007ff
184 #define TR_33_PIO_E 0x00000400
185 #define TR_33_PIO_RECOVERY_MASK 0x000003e0
186 #define TR_33_PIO_RECOVERY_SHIFT 5
187 #define TR_33_PIO_ACCESS_MASK 0x0000001f
188 #define TR_33_PIO_ACCESS_SHIFT 0
189
190 /*
191 * Interrupt register definitions. Only present on newer cells
192 * (Keylargo and later afaik) so we don't use it.
193 */
194 #define IDE_INTR_DMA 0x80000000
195 #define IDE_INTR_DEVICE 0x40000000
196
197 /*
198 * FCR Register on Kauai. Not sure what bit 0x4 is ...
199 */
200 #define KAUAI_FCR_UATA_MAGIC 0x00000004
201 #define KAUAI_FCR_UATA_RESET_N 0x00000002
202 #define KAUAI_FCR_UATA_ENABLE 0x00000001
203
204
205 /* Allow up to 256 DBDMA commands per xfer */
206 #define MAX_DCMDS 256
207
208 /* Don't let a DMA segment go all the way to 64K */
209 #define MAX_DBDMA_SEG 0xff00
210
211 #ifdef CONFIG_PAGE_SIZE_64KB
212 /*
213 * The SCSI core requires the segment size to cover at least a page, so
214 * for 64K page size kernels it must be at least 64K. However the
215 * hardware can't handle 64K, so pata_macio_qc_prep() will split large
216 * requests. To handle the split requests the tablesize must be halved.
217 */
218 #define PATA_MACIO_MAX_SEGMENT_SIZE SZ_64K
219 #define PATA_MACIO_SG_TABLESIZE (MAX_DCMDS / 2)
220 #else
221 #define PATA_MACIO_MAX_SEGMENT_SIZE MAX_DBDMA_SEG
222 #define PATA_MACIO_SG_TABLESIZE MAX_DCMDS
223 #endif
224
225 /*
226 * Wait 1s for disk to answer on IDE bus after a hard reset
227 * of the device (via GPIO/FCR).
228 *
229 * Some devices seem to "pollute" the bus even after dropping
230 * the BSY bit (typically some combo drives slave on the UDMA
231 * bus) after a hard reset. Since we hard reset all drives on
232 * KeyLargo ATA66, we have to keep that delay around. I may end
233 * up not hard resetting anymore on these and keep the delay only
234 * for older interfaces instead (we have to reset when coming
235 * from MacOS...) --BenH.
236 */
237 #define IDE_WAKEUP_DELAY_MS 1000
238
239 struct pata_macio_timing;
240
241 struct pata_macio_priv {
242 int kind;
243 int aapl_bus_id;
244 int mediabay : 1;
245 struct device_node *node;
246 struct macio_dev *mdev;
247 struct pci_dev *pdev;
248 struct device *dev;
249 int irq;
250 u32 treg[2][2];
251 void __iomem *tfregs;
252 void __iomem *kauai_fcr;
253 struct dbdma_cmd * dma_table_cpu;
254 dma_addr_t dma_table_dma;
255 struct ata_host *host;
256 const struct pata_macio_timing *timings;
257 };
258
259 /* Previous variants of this driver used to calculate timings
260 * for various variants of the chip and use tables for others.
261 *
262 * Not only was this confusing, but in addition, it isn't clear
263 * whether our calculation code was correct. It didn't entirely
264 * match the darwin code and whatever documentation I could find
265 * on these cells
266 *
267 * I decided to entirely rely on a table instead for this version
268 * of the driver. Also, because I don't really care about derated
269 * modes and really old HW other than making it work, I'm not going
270 * to calculate / snoop timing values for something else than the
271 * standard modes.
272 */
273 struct pata_macio_timing {
274 int mode;
275 u32 reg1; /* Bits to set in first timing reg */
276 u32 reg2; /* Bits to set in second timing reg */
277 };
278
279 static const struct pata_macio_timing pata_macio_ohare_timings[] = {
280 { XFER_PIO_0, 0x00000526, 0, },
281 { XFER_PIO_1, 0x00000085, 0, },
282 { XFER_PIO_2, 0x00000025, 0, },
283 { XFER_PIO_3, 0x00000025, 0, },
284 { XFER_PIO_4, 0x00000025, 0, },
285 { XFER_MW_DMA_0, 0x00074000, 0, },
286 { XFER_MW_DMA_1, 0x00221000, 0, },
287 { XFER_MW_DMA_2, 0x00211000, 0, },
288 { -1, 0, 0 }
289 };
290
291 static const struct pata_macio_timing pata_macio_heathrow_timings[] = {
292 { XFER_PIO_0, 0x00000526, 0, },
293 { XFER_PIO_1, 0x00000085, 0, },
294 { XFER_PIO_2, 0x00000025, 0, },
295 { XFER_PIO_3, 0x00000025, 0, },
296 { XFER_PIO_4, 0x00000025, 0, },
297 { XFER_MW_DMA_0, 0x00074000, 0, },
298 { XFER_MW_DMA_1, 0x00221000, 0, },
299 { XFER_MW_DMA_2, 0x00211000, 0, },
300 { -1, 0, 0 }
301 };
302
303 static const struct pata_macio_timing pata_macio_kl33_timings[] = {
304 { XFER_PIO_0, 0x00000526, 0, },
305 { XFER_PIO_1, 0x00000085, 0, },
306 { XFER_PIO_2, 0x00000025, 0, },
307 { XFER_PIO_3, 0x00000025, 0, },
308 { XFER_PIO_4, 0x00000025, 0, },
309 { XFER_MW_DMA_0, 0x00084000, 0, },
310 { XFER_MW_DMA_1, 0x00021800, 0, },
311 { XFER_MW_DMA_2, 0x00011800, 0, },
312 { -1, 0, 0 }
313 };
314
315 static const struct pata_macio_timing pata_macio_kl66_timings[] = {
316 { XFER_PIO_0, 0x0000038c, 0, },
317 { XFER_PIO_1, 0x0000020a, 0, },
318 { XFER_PIO_2, 0x00000127, 0, },
319 { XFER_PIO_3, 0x000000c6, 0, },
320 { XFER_PIO_4, 0x00000065, 0, },
321 { XFER_MW_DMA_0, 0x00084000, 0, },
322 { XFER_MW_DMA_1, 0x00029800, 0, },
323 { XFER_MW_DMA_2, 0x00019400, 0, },
324 { XFER_UDMA_0, 0x19100000, 0, },
325 { XFER_UDMA_1, 0x14d00000, 0, },
326 { XFER_UDMA_2, 0x10900000, 0, },
327 { XFER_UDMA_3, 0x0c700000, 0, },
328 { XFER_UDMA_4, 0x0c500000, 0, },
329 { -1, 0, 0 }
330 };
331
332 static const struct pata_macio_timing pata_macio_kauai_timings[] = {
333 { XFER_PIO_0, 0x08000a92, 0, },
334 { XFER_PIO_1, 0x0800060f, 0, },
335 { XFER_PIO_2, 0x0800038b, 0, },
336 { XFER_PIO_3, 0x05000249, 0, },
337 { XFER_PIO_4, 0x04000148, 0, },
338 { XFER_MW_DMA_0, 0x00618000, 0, },
339 { XFER_MW_DMA_1, 0x00209000, 0, },
340 { XFER_MW_DMA_2, 0x00148000, 0, },
341 { XFER_UDMA_0, 0, 0x000070c1, },
342 { XFER_UDMA_1, 0, 0x00005d81, },
343 { XFER_UDMA_2, 0, 0x00004a61, },
344 { XFER_UDMA_3, 0, 0x00003a51, },
345 { XFER_UDMA_4, 0, 0x00002a31, },
346 { XFER_UDMA_5, 0, 0x00002921, },
347 { -1, 0, 0 }
348 };
349
350 static const struct pata_macio_timing pata_macio_shasta_timings[] = {
351 { XFER_PIO_0, 0x0a000c97, 0, },
352 { XFER_PIO_1, 0x07000712, 0, },
353 { XFER_PIO_2, 0x040003cd, 0, },
354 { XFER_PIO_3, 0x0500028b, 0, },
355 { XFER_PIO_4, 0x0400010a, 0, },
356 { XFER_MW_DMA_0, 0x00820800, 0, },
357 { XFER_MW_DMA_1, 0x0028b000, 0, },
358 { XFER_MW_DMA_2, 0x001ca000, 0, },
359 { XFER_UDMA_0, 0, 0x00035901, },
360 { XFER_UDMA_1, 0, 0x000348b1, },
361 { XFER_UDMA_2, 0, 0x00033881, },
362 { XFER_UDMA_3, 0, 0x00033861, },
363 { XFER_UDMA_4, 0, 0x00033841, },
364 { XFER_UDMA_5, 0, 0x00033031, },
365 { XFER_UDMA_6, 0, 0x00033021, },
366 { -1, 0, 0 }
367 };
368
pata_macio_find_timing(struct pata_macio_priv * priv,int mode)369 static const struct pata_macio_timing *pata_macio_find_timing(
370 struct pata_macio_priv *priv,
371 int mode)
372 {
373 int i;
374
375 for (i = 0; priv->timings[i].mode > 0; i++) {
376 if (priv->timings[i].mode == mode)
377 return &priv->timings[i];
378 }
379 return NULL;
380 }
381
382
pata_macio_apply_timings(struct ata_port * ap,unsigned int device)383 static void pata_macio_apply_timings(struct ata_port *ap, unsigned int device)
384 {
385 struct pata_macio_priv *priv = ap->private_data;
386 void __iomem *rbase = ap->ioaddr.cmd_addr;
387
388 if (priv->kind == controller_sh_ata6 ||
389 priv->kind == controller_un_ata6 ||
390 priv->kind == controller_k2_ata6) {
391 writel(priv->treg[device][0], rbase + IDE_KAUAI_PIO_CONFIG);
392 writel(priv->treg[device][1], rbase + IDE_KAUAI_ULTRA_CONFIG);
393 } else
394 writel(priv->treg[device][0], rbase + IDE_TIMING_CONFIG);
395 }
396
pata_macio_dev_select(struct ata_port * ap,unsigned int device)397 static void pata_macio_dev_select(struct ata_port *ap, unsigned int device)
398 {
399 ata_sff_dev_select(ap, device);
400
401 /* Apply timings */
402 pata_macio_apply_timings(ap, device);
403 }
404
pata_macio_set_timings(struct ata_port * ap,struct ata_device * adev)405 static void pata_macio_set_timings(struct ata_port *ap,
406 struct ata_device *adev)
407 {
408 struct pata_macio_priv *priv = ap->private_data;
409 const struct pata_macio_timing *t;
410
411 dev_dbg(priv->dev, "Set timings: DEV=%d,PIO=0x%x (%s),DMA=0x%x (%s)\n",
412 adev->devno,
413 adev->pio_mode,
414 ata_mode_string(ata_xfer_mode2mask(adev->pio_mode)),
415 adev->dma_mode,
416 ata_mode_string(ata_xfer_mode2mask(adev->dma_mode)));
417
418 /* First clear timings */
419 priv->treg[adev->devno][0] = priv->treg[adev->devno][1] = 0;
420
421 /* Now get the PIO timings */
422 t = pata_macio_find_timing(priv, adev->pio_mode);
423 if (t == NULL) {
424 dev_warn(priv->dev, "Invalid PIO timing requested: 0x%x\n",
425 adev->pio_mode);
426 t = pata_macio_find_timing(priv, XFER_PIO_0);
427 }
428 BUG_ON(t == NULL);
429
430 /* PIO timings only ever use the first treg */
431 priv->treg[adev->devno][0] |= t->reg1;
432
433 /* Now get DMA timings */
434 t = pata_macio_find_timing(priv, adev->dma_mode);
435 if (t == NULL || (t->reg1 == 0 && t->reg2 == 0)) {
436 dev_dbg(priv->dev, "DMA timing not set yet, using MW_DMA_0\n");
437 t = pata_macio_find_timing(priv, XFER_MW_DMA_0);
438 }
439 BUG_ON(t == NULL);
440
441 /* DMA timings can use both tregs */
442 priv->treg[adev->devno][0] |= t->reg1;
443 priv->treg[adev->devno][1] |= t->reg2;
444
445 dev_dbg(priv->dev, " -> %08x %08x\n",
446 priv->treg[adev->devno][0],
447 priv->treg[adev->devno][1]);
448
449 /* Apply to hardware */
450 pata_macio_apply_timings(ap, adev->devno);
451 }
452
453 /*
454 * Blast some well known "safe" values to the timing registers at init or
455 * wakeup from sleep time, before we do real calculation
456 */
pata_macio_default_timings(struct pata_macio_priv * priv)457 static void pata_macio_default_timings(struct pata_macio_priv *priv)
458 {
459 unsigned int value, value2 = 0;
460
461 switch(priv->kind) {
462 case controller_sh_ata6:
463 value = 0x0a820c97;
464 value2 = 0x00033031;
465 break;
466 case controller_un_ata6:
467 case controller_k2_ata6:
468 value = 0x08618a92;
469 value2 = 0x00002921;
470 break;
471 case controller_kl_ata4:
472 value = 0x0008438c;
473 break;
474 case controller_kl_ata3:
475 value = 0x00084526;
476 break;
477 case controller_heathrow:
478 case controller_ohare:
479 default:
480 value = 0x00074526;
481 break;
482 }
483 priv->treg[0][0] = priv->treg[1][0] = value;
484 priv->treg[0][1] = priv->treg[1][1] = value2;
485 }
486
pata_macio_cable_detect(struct ata_port * ap)487 static int pata_macio_cable_detect(struct ata_port *ap)
488 {
489 struct pata_macio_priv *priv = ap->private_data;
490
491 /* Get cable type from device-tree */
492 if (priv->kind == controller_kl_ata4 ||
493 priv->kind == controller_un_ata6 ||
494 priv->kind == controller_k2_ata6 ||
495 priv->kind == controller_sh_ata6) {
496 const char* cable = of_get_property(priv->node, "cable-type",
497 NULL);
498 struct device_node *root = of_find_node_by_path("/");
499 const char *model = of_get_property(root, "model", NULL);
500
501 of_node_put(root);
502
503 if (cable && !strncmp(cable, "80-", 3)) {
504 /* Some drives fail to detect 80c cable in PowerBook
505 * These machine use proprietary short IDE cable
506 * anyway
507 */
508 if (!strncmp(model, "PowerBook", 9))
509 return ATA_CBL_PATA40_SHORT;
510 else
511 return ATA_CBL_PATA80;
512 }
513 }
514
515 /* G5's seem to have incorrect cable type in device-tree.
516 * Let's assume they always have a 80 conductor cable, this seem to
517 * be always the case unless the user mucked around
518 */
519 if (of_device_is_compatible(priv->node, "K2-UATA") ||
520 of_device_is_compatible(priv->node, "shasta-ata"))
521 return ATA_CBL_PATA80;
522
523 /* Anything else is 40 connectors */
524 return ATA_CBL_PATA40;
525 }
526
pata_macio_qc_prep(struct ata_queued_cmd * qc)527 static enum ata_completion_errors pata_macio_qc_prep(struct ata_queued_cmd *qc)
528 {
529 unsigned int write = (qc->tf.flags & ATA_TFLAG_WRITE);
530 struct ata_port *ap = qc->ap;
531 struct pata_macio_priv *priv = ap->private_data;
532 struct scatterlist *sg;
533 struct dbdma_cmd *table;
534 unsigned int si, pi;
535
536 dev_dbgdma(priv->dev, "%s: qc %p flags %lx, write %d dev %d\n",
537 __func__, qc, qc->flags, write, qc->dev->devno);
538
539 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
540 return AC_ERR_OK;
541
542 table = (struct dbdma_cmd *) priv->dma_table_cpu;
543
544 pi = 0;
545 for_each_sg(qc->sg, sg, qc->n_elem, si) {
546 u32 addr, sg_len, len;
547
548 /* determine if physical DMA addr spans 64K boundary.
549 * Note h/w doesn't support 64-bit, so we unconditionally
550 * truncate dma_addr_t to u32.
551 */
552 addr = (u32) sg_dma_address(sg);
553 sg_len = sg_dma_len(sg);
554
555 while (sg_len) {
556 /* table overflow should never happen */
557 if (WARN_ON_ONCE(pi >= MAX_DCMDS))
558 return AC_ERR_SYSTEM;
559
560 len = (sg_len < MAX_DBDMA_SEG) ? sg_len : MAX_DBDMA_SEG;
561 table->command = cpu_to_le16(write ? OUTPUT_MORE: INPUT_MORE);
562 table->req_count = cpu_to_le16(len);
563 table->phy_addr = cpu_to_le32(addr);
564 table->cmd_dep = 0;
565 table->xfer_status = 0;
566 table->res_count = 0;
567 addr += len;
568 sg_len -= len;
569 ++table;
570 ++pi;
571 }
572 }
573
574 /* Should never happen according to Tejun */
575 if (WARN_ON_ONCE(!pi))
576 return AC_ERR_SYSTEM;
577
578 /* Convert the last command to an input/output */
579 table--;
580 table->command = cpu_to_le16(write ? OUTPUT_LAST: INPUT_LAST);
581 table++;
582
583 /* Add the stop command to the end of the list */
584 memset(table, 0, sizeof(struct dbdma_cmd));
585 table->command = cpu_to_le16(DBDMA_STOP);
586
587 dev_dbgdma(priv->dev, "%s: %d DMA list entries\n", __func__, pi);
588
589 return AC_ERR_OK;
590 }
591
592
pata_macio_freeze(struct ata_port * ap)593 static void pata_macio_freeze(struct ata_port *ap)
594 {
595 struct dbdma_regs __iomem *dma_regs = ap->ioaddr.bmdma_addr;
596
597 if (dma_regs) {
598 unsigned int timeout = 1000000;
599
600 /* Make sure DMA controller is stopped */
601 writel((RUN|PAUSE|FLUSH|WAKE|DEAD) << 16, &dma_regs->control);
602 while (--timeout && (readl(&dma_regs->status) & RUN))
603 udelay(1);
604 }
605
606 ata_sff_freeze(ap);
607 }
608
609
pata_macio_bmdma_setup(struct ata_queued_cmd * qc)610 static void pata_macio_bmdma_setup(struct ata_queued_cmd *qc)
611 {
612 struct ata_port *ap = qc->ap;
613 struct pata_macio_priv *priv = ap->private_data;
614 struct dbdma_regs __iomem *dma_regs = ap->ioaddr.bmdma_addr;
615 int dev = qc->dev->devno;
616
617 dev_dbgdma(priv->dev, "%s: qc %p\n", __func__, qc);
618
619 /* Make sure DMA commands updates are visible */
620 writel(priv->dma_table_dma, &dma_regs->cmdptr);
621
622 /* On KeyLargo 66Mhz cell, we need to add 60ns to wrDataSetup on
623 * UDMA reads
624 */
625 if (priv->kind == controller_kl_ata4 &&
626 (priv->treg[dev][0] & TR_66_UDMA_EN)) {
627 void __iomem *rbase = ap->ioaddr.cmd_addr;
628 u32 reg = priv->treg[dev][0];
629
630 if (!(qc->tf.flags & ATA_TFLAG_WRITE))
631 reg += 0x00800000;
632 writel(reg, rbase + IDE_TIMING_CONFIG);
633 }
634
635 /* issue r/w command */
636 ap->ops->sff_exec_command(ap, &qc->tf);
637 }
638
pata_macio_bmdma_start(struct ata_queued_cmd * qc)639 static void pata_macio_bmdma_start(struct ata_queued_cmd *qc)
640 {
641 struct ata_port *ap = qc->ap;
642 struct pata_macio_priv *priv = ap->private_data;
643 struct dbdma_regs __iomem *dma_regs = ap->ioaddr.bmdma_addr;
644
645 dev_dbgdma(priv->dev, "%s: qc %p\n", __func__, qc);
646
647 writel((RUN << 16) | RUN, &dma_regs->control);
648 /* Make sure it gets to the controller right now */
649 (void)readl(&dma_regs->control);
650 }
651
pata_macio_bmdma_stop(struct ata_queued_cmd * qc)652 static void pata_macio_bmdma_stop(struct ata_queued_cmd *qc)
653 {
654 struct ata_port *ap = qc->ap;
655 struct pata_macio_priv *priv = ap->private_data;
656 struct dbdma_regs __iomem *dma_regs = ap->ioaddr.bmdma_addr;
657 unsigned int timeout = 1000000;
658
659 dev_dbgdma(priv->dev, "%s: qc %p\n", __func__, qc);
660
661 /* Stop the DMA engine and wait for it to full halt */
662 writel (((RUN|WAKE|DEAD) << 16), &dma_regs->control);
663 while (--timeout && (readl(&dma_regs->status) & RUN))
664 udelay(1);
665 }
666
pata_macio_bmdma_status(struct ata_port * ap)667 static u8 pata_macio_bmdma_status(struct ata_port *ap)
668 {
669 struct pata_macio_priv *priv = ap->private_data;
670 struct dbdma_regs __iomem *dma_regs = ap->ioaddr.bmdma_addr;
671 u32 dstat, rstat = ATA_DMA_INTR;
672 unsigned long timeout = 0;
673
674 dstat = readl(&dma_regs->status);
675
676 dev_dbgdma(priv->dev, "%s: dstat=%x\n", __func__, dstat);
677
678 /* We have two things to deal with here:
679 *
680 * - The dbdma won't stop if the command was started
681 * but completed with an error without transferring all
682 * datas. This happens when bad blocks are met during
683 * a multi-block transfer.
684 *
685 * - The dbdma fifo hasn't yet finished flushing to
686 * system memory when the disk interrupt occurs.
687 */
688
689 /* First check for errors */
690 if ((dstat & (RUN|DEAD)) != RUN)
691 rstat |= ATA_DMA_ERR;
692
693 /* If ACTIVE is cleared, the STOP command has been hit and
694 * the transfer is complete. If not, we have to flush the
695 * channel.
696 */
697 if ((dstat & ACTIVE) == 0)
698 return rstat;
699
700 dev_dbgdma(priv->dev, "%s: DMA still active, flushing...\n", __func__);
701
702 /* If dbdma didn't execute the STOP command yet, the
703 * active bit is still set. We consider that we aren't
704 * sharing interrupts (which is hopefully the case with
705 * those controllers) and so we just try to flush the
706 * channel for pending data in the fifo
707 */
708 udelay(1);
709 writel((FLUSH << 16) | FLUSH, &dma_regs->control);
710 for (;;) {
711 udelay(1);
712 dstat = readl(&dma_regs->status);
713 if ((dstat & FLUSH) == 0)
714 break;
715 if (++timeout > 1000) {
716 dev_warn(priv->dev, "timeout flushing DMA\n");
717 rstat |= ATA_DMA_ERR;
718 break;
719 }
720 }
721 return rstat;
722 }
723
724 /* port_start is when we allocate the DMA command list */
pata_macio_port_start(struct ata_port * ap)725 static int pata_macio_port_start(struct ata_port *ap)
726 {
727 struct pata_macio_priv *priv = ap->private_data;
728
729 if (ap->ioaddr.bmdma_addr == NULL)
730 return 0;
731
732 /* Allocate space for the DBDMA commands.
733 *
734 * The +2 is +1 for the stop command and +1 to allow for
735 * aligning the start address to a multiple of 16 bytes.
736 */
737 priv->dma_table_cpu =
738 dmam_alloc_coherent(priv->dev,
739 (MAX_DCMDS + 2) * sizeof(struct dbdma_cmd),
740 &priv->dma_table_dma, GFP_KERNEL);
741 if (priv->dma_table_cpu == NULL) {
742 dev_err(priv->dev, "Unable to allocate DMA command list\n");
743 ap->ioaddr.bmdma_addr = NULL;
744 ap->mwdma_mask = 0;
745 ap->udma_mask = 0;
746 }
747 return 0;
748 }
749
pata_macio_irq_clear(struct ata_port * ap)750 static void pata_macio_irq_clear(struct ata_port *ap)
751 {
752 struct pata_macio_priv *priv = ap->private_data;
753
754 /* Nothing to do here */
755
756 dev_dbgdma(priv->dev, "%s\n", __func__);
757 }
758
pata_macio_reset_hw(struct pata_macio_priv * priv,int resume)759 static void pata_macio_reset_hw(struct pata_macio_priv *priv, int resume)
760 {
761 dev_dbg(priv->dev, "Enabling & resetting... \n");
762
763 if (priv->mediabay)
764 return;
765
766 if (priv->kind == controller_ohare && !resume) {
767 /* The code below is having trouble on some ohare machines
768 * (timing related ?). Until I can put my hand on one of these
769 * units, I keep the old way
770 */
771 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, priv->node, 0, 1);
772 } else {
773 int rc;
774
775 /* Reset and enable controller */
776 rc = ppc_md.feature_call(PMAC_FTR_IDE_RESET,
777 priv->node, priv->aapl_bus_id, 1);
778 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE,
779 priv->node, priv->aapl_bus_id, 1);
780 msleep(10);
781 /* Only bother waiting if there's a reset control */
782 if (rc == 0) {
783 ppc_md.feature_call(PMAC_FTR_IDE_RESET,
784 priv->node, priv->aapl_bus_id, 0);
785 msleep(IDE_WAKEUP_DELAY_MS);
786 }
787 }
788
789 /* If resuming a PCI device, restore the config space here */
790 if (priv->pdev && resume) {
791 int rc;
792
793 pci_restore_state(priv->pdev);
794 rc = pcim_enable_device(priv->pdev);
795 if (rc)
796 dev_err(&priv->pdev->dev,
797 "Failed to enable device after resume (%d)\n",
798 rc);
799 else
800 pci_set_master(priv->pdev);
801 }
802
803 /* On Kauai, initialize the FCR. We don't perform a reset, doesn't really
804 * seem necessary and speeds up the boot process
805 */
806 if (priv->kauai_fcr)
807 writel(KAUAI_FCR_UATA_MAGIC |
808 KAUAI_FCR_UATA_RESET_N |
809 KAUAI_FCR_UATA_ENABLE, priv->kauai_fcr);
810 }
811
812 /* Hook the standard slave config to fixup some HW related alignment
813 * restrictions
814 */
pata_macio_device_configure(struct scsi_device * sdev,struct queue_limits * lim)815 static int pata_macio_device_configure(struct scsi_device *sdev,
816 struct queue_limits *lim)
817 {
818 struct ata_port *ap = ata_shost_to_port(sdev->host);
819 struct pata_macio_priv *priv = ap->private_data;
820 struct ata_device *dev;
821 u16 cmd;
822 int rc;
823
824 /* First call original */
825 rc = ata_scsi_device_configure(sdev, lim);
826 if (rc)
827 return rc;
828
829 /* This is lifted from sata_nv */
830 dev = &ap->link.device[sdev->id];
831
832 /* OHare has issues with non cache aligned DMA on some chipsets */
833 if (priv->kind == controller_ohare) {
834 lim->dma_alignment = 31;
835 lim->dma_pad_mask = 31;
836
837 /* Tell the world about it */
838 ata_dev_info(dev, "OHare alignment limits applied\n");
839 return 0;
840 }
841
842 /* We only have issues with ATAPI */
843 if (dev->class != ATA_DEV_ATAPI)
844 return 0;
845
846 /* Shasta and K2 seem to have "issues" with reads ... */
847 if (priv->kind == controller_sh_ata6 || priv->kind == controller_k2_ata6) {
848 /* Allright these are bad, apply restrictions */
849 lim->dma_alignment = 15;
850 lim->dma_pad_mask = 15;
851
852 /* We enable MWI and hack cache line size directly here, this
853 * is specific to this chipset and not normal values, we happen
854 * to somewhat know what we are doing here (which is basically
855 * to do the same Apple does and pray they did not get it wrong :-)
856 */
857 BUG_ON(!priv->pdev);
858 pci_write_config_byte(priv->pdev, PCI_CACHE_LINE_SIZE, 0x08);
859 pci_read_config_word(priv->pdev, PCI_COMMAND, &cmd);
860 pci_write_config_word(priv->pdev, PCI_COMMAND,
861 cmd | PCI_COMMAND_INVALIDATE);
862
863 /* Tell the world about it */
864 ata_dev_info(dev, "K2/Shasta alignment limits applied\n");
865 }
866
867 return 0;
868 }
869
870 #ifdef CONFIG_PM_SLEEP
pata_macio_do_suspend(struct pata_macio_priv * priv,pm_message_t mesg)871 static int pata_macio_do_suspend(struct pata_macio_priv *priv, pm_message_t mesg)
872 {
873 /* First, core libata suspend to do most of the work */
874 ata_host_suspend(priv->host, mesg);
875
876 /* Restore to default timings */
877 pata_macio_default_timings(priv);
878
879 /* Mask interrupt. Not strictly necessary but old driver did
880 * it and I'd rather not change that here */
881 disable_irq(priv->irq);
882
883 /* The media bay will handle itself just fine */
884 if (priv->mediabay)
885 return 0;
886
887 /* Kauai has bus control FCRs directly here */
888 if (priv->kauai_fcr) {
889 u32 fcr = readl(priv->kauai_fcr);
890 fcr &= ~(KAUAI_FCR_UATA_RESET_N | KAUAI_FCR_UATA_ENABLE);
891 writel(fcr, priv->kauai_fcr);
892 }
893
894 /* For PCI, save state and disable DMA. No need to call
895 * pci_set_power_state(), the HW doesn't do D states that
896 * way, the platform code will take care of suspending the
897 * ASIC properly
898 */
899 if (priv->pdev) {
900 pci_save_state(priv->pdev);
901 pci_disable_device(priv->pdev);
902 }
903
904 /* Disable the bus on older machines and the cell on kauai */
905 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, priv->node,
906 priv->aapl_bus_id, 0);
907
908 return 0;
909 }
910
pata_macio_do_resume(struct pata_macio_priv * priv)911 static int pata_macio_do_resume(struct pata_macio_priv *priv)
912 {
913 /* Reset and re-enable the HW */
914 pata_macio_reset_hw(priv, 1);
915
916 /* Sanitize drive timings */
917 pata_macio_apply_timings(priv->host->ports[0], 0);
918
919 /* We want our IRQ back ! */
920 enable_irq(priv->irq);
921
922 /* Let the libata core take it from there */
923 ata_host_resume(priv->host);
924
925 return 0;
926 }
927 #endif /* CONFIG_PM_SLEEP */
928
929 static const struct scsi_host_template pata_macio_sht = {
930 __ATA_BASE_SHT(DRV_NAME),
931 .sg_tablesize = PATA_MACIO_SG_TABLESIZE,
932 /* We may not need that strict one */
933 .dma_boundary = ATA_DMA_BOUNDARY,
934 .max_segment_size = PATA_MACIO_MAX_SEGMENT_SIZE,
935 .device_configure = pata_macio_device_configure,
936 .sdev_groups = ata_common_sdev_groups,
937 .can_queue = ATA_DEF_QUEUE,
938 .tag_alloc_policy = BLK_TAG_ALLOC_RR,
939 };
940
941 static struct ata_port_operations pata_macio_ops = {
942 .inherits = &ata_bmdma_port_ops,
943
944 .freeze = pata_macio_freeze,
945 .set_piomode = pata_macio_set_timings,
946 .set_dmamode = pata_macio_set_timings,
947 .cable_detect = pata_macio_cable_detect,
948 .sff_dev_select = pata_macio_dev_select,
949 .qc_prep = pata_macio_qc_prep,
950 .bmdma_setup = pata_macio_bmdma_setup,
951 .bmdma_start = pata_macio_bmdma_start,
952 .bmdma_stop = pata_macio_bmdma_stop,
953 .bmdma_status = pata_macio_bmdma_status,
954 .port_start = pata_macio_port_start,
955 .sff_irq_clear = pata_macio_irq_clear,
956 };
957
pata_macio_invariants(struct pata_macio_priv * priv)958 static void pata_macio_invariants(struct pata_macio_priv *priv)
959 {
960 const int *bidp;
961
962 /* Identify the type of controller */
963 if (of_device_is_compatible(priv->node, "shasta-ata")) {
964 priv->kind = controller_sh_ata6;
965 priv->timings = pata_macio_shasta_timings;
966 } else if (of_device_is_compatible(priv->node, "kauai-ata")) {
967 priv->kind = controller_un_ata6;
968 priv->timings = pata_macio_kauai_timings;
969 } else if (of_device_is_compatible(priv->node, "K2-UATA")) {
970 priv->kind = controller_k2_ata6;
971 priv->timings = pata_macio_kauai_timings;
972 } else if (of_device_is_compatible(priv->node, "keylargo-ata")) {
973 if (of_node_name_eq(priv->node, "ata-4")) {
974 priv->kind = controller_kl_ata4;
975 priv->timings = pata_macio_kl66_timings;
976 } else {
977 priv->kind = controller_kl_ata3;
978 priv->timings = pata_macio_kl33_timings;
979 }
980 } else if (of_device_is_compatible(priv->node, "heathrow-ata")) {
981 priv->kind = controller_heathrow;
982 priv->timings = pata_macio_heathrow_timings;
983 } else {
984 priv->kind = controller_ohare;
985 priv->timings = pata_macio_ohare_timings;
986 }
987
988 /* XXX FIXME --- setup priv->mediabay here */
989
990 /* Get Apple bus ID (for clock and ASIC control) */
991 bidp = of_get_property(priv->node, "AAPL,bus-id", NULL);
992 priv->aapl_bus_id = bidp ? *bidp : 0;
993
994 /* Fixup missing Apple bus ID in case of media-bay */
995 if (priv->mediabay && !bidp)
996 priv->aapl_bus_id = 1;
997 }
998
pata_macio_setup_ios(struct ata_ioports * ioaddr,void __iomem * base,void __iomem * dma)999 static void pata_macio_setup_ios(struct ata_ioports *ioaddr,
1000 void __iomem * base, void __iomem * dma)
1001 {
1002 /* cmd_addr is the base of regs for that port */
1003 ioaddr->cmd_addr = base;
1004
1005 /* taskfile registers */
1006 ioaddr->data_addr = base + (ATA_REG_DATA << 4);
1007 ioaddr->error_addr = base + (ATA_REG_ERR << 4);
1008 ioaddr->feature_addr = base + (ATA_REG_FEATURE << 4);
1009 ioaddr->nsect_addr = base + (ATA_REG_NSECT << 4);
1010 ioaddr->lbal_addr = base + (ATA_REG_LBAL << 4);
1011 ioaddr->lbam_addr = base + (ATA_REG_LBAM << 4);
1012 ioaddr->lbah_addr = base + (ATA_REG_LBAH << 4);
1013 ioaddr->device_addr = base + (ATA_REG_DEVICE << 4);
1014 ioaddr->status_addr = base + (ATA_REG_STATUS << 4);
1015 ioaddr->command_addr = base + (ATA_REG_CMD << 4);
1016 ioaddr->altstatus_addr = base + 0x160;
1017 ioaddr->ctl_addr = base + 0x160;
1018 ioaddr->bmdma_addr = dma;
1019 }
1020
pmac_macio_calc_timing_masks(struct pata_macio_priv * priv,struct ata_port_info * pinfo)1021 static void pmac_macio_calc_timing_masks(struct pata_macio_priv *priv,
1022 struct ata_port_info *pinfo)
1023 {
1024 int i = 0;
1025
1026 pinfo->pio_mask = 0;
1027 pinfo->mwdma_mask = 0;
1028 pinfo->udma_mask = 0;
1029
1030 while (priv->timings[i].mode > 0) {
1031 unsigned int mask = 1U << (priv->timings[i].mode & 0x0f);
1032 switch(priv->timings[i].mode & 0xf0) {
1033 case 0x00: /* PIO */
1034 pinfo->pio_mask |= (mask >> 8);
1035 break;
1036 case 0x20: /* MWDMA */
1037 pinfo->mwdma_mask |= mask;
1038 break;
1039 case 0x40: /* UDMA */
1040 pinfo->udma_mask |= mask;
1041 break;
1042 }
1043 i++;
1044 }
1045 dev_dbg(priv->dev, "Supported masks: PIO=%x, MWDMA=%x, UDMA=%x\n",
1046 pinfo->pio_mask, pinfo->mwdma_mask, pinfo->udma_mask);
1047 }
1048
pata_macio_common_init(struct pata_macio_priv * priv,resource_size_t tfregs,resource_size_t dmaregs,resource_size_t fcregs,unsigned long irq)1049 static int pata_macio_common_init(struct pata_macio_priv *priv,
1050 resource_size_t tfregs,
1051 resource_size_t dmaregs,
1052 resource_size_t fcregs,
1053 unsigned long irq)
1054 {
1055 struct ata_port_info pinfo;
1056 const struct ata_port_info *ppi[] = { &pinfo, NULL };
1057 void __iomem *dma_regs = NULL;
1058
1059 /* Fill up privates with various invariants collected from the
1060 * device-tree
1061 */
1062 pata_macio_invariants(priv);
1063
1064 /* Make sure we have sane initial timings in the cache */
1065 pata_macio_default_timings(priv);
1066
1067 /* Allocate libata host for 1 port */
1068 memset(&pinfo, 0, sizeof(struct ata_port_info));
1069 pmac_macio_calc_timing_masks(priv, &pinfo);
1070 pinfo.flags = ATA_FLAG_SLAVE_POSS;
1071 pinfo.port_ops = &pata_macio_ops;
1072 pinfo.private_data = priv;
1073
1074 priv->host = ata_host_alloc_pinfo(priv->dev, ppi, 1);
1075 if (priv->host == NULL) {
1076 dev_err(priv->dev, "Failed to allocate ATA port structure\n");
1077 return -ENOMEM;
1078 }
1079
1080 /* Setup the private data in host too */
1081 priv->host->private_data = priv;
1082
1083 /* Map base registers */
1084 priv->tfregs = devm_ioremap(priv->dev, tfregs, 0x100);
1085 if (priv->tfregs == NULL) {
1086 dev_err(priv->dev, "Failed to map ATA ports\n");
1087 return -ENOMEM;
1088 }
1089 priv->host->iomap = &priv->tfregs;
1090
1091 /* Map DMA regs */
1092 if (dmaregs != 0) {
1093 dma_regs = devm_ioremap(priv->dev, dmaregs,
1094 sizeof(struct dbdma_regs));
1095 if (dma_regs == NULL)
1096 dev_warn(priv->dev, "Failed to map ATA DMA registers\n");
1097 }
1098
1099 /* If chip has local feature control, map those regs too */
1100 if (fcregs != 0) {
1101 priv->kauai_fcr = devm_ioremap(priv->dev, fcregs, 4);
1102 if (priv->kauai_fcr == NULL) {
1103 dev_err(priv->dev, "Failed to map ATA FCR register\n");
1104 return -ENOMEM;
1105 }
1106 }
1107
1108 /* Setup port data structure */
1109 pata_macio_setup_ios(&priv->host->ports[0]->ioaddr,
1110 priv->tfregs, dma_regs);
1111 priv->host->ports[0]->private_data = priv;
1112
1113 /* hard-reset the controller */
1114 pata_macio_reset_hw(priv, 0);
1115 pata_macio_apply_timings(priv->host->ports[0], 0);
1116
1117 /* Enable bus master if necessary */
1118 if (priv->pdev && dma_regs)
1119 pci_set_master(priv->pdev);
1120
1121 dev_info(priv->dev, "Activating pata-macio chipset %s, Apple bus ID %d\n",
1122 macio_ata_names[priv->kind], priv->aapl_bus_id);
1123
1124 /* Start it up */
1125 priv->irq = irq;
1126 return ata_host_activate(priv->host, irq, ata_bmdma_interrupt, 0,
1127 &pata_macio_sht);
1128 }
1129
pata_macio_attach(struct macio_dev * mdev,const struct of_device_id * match)1130 static int pata_macio_attach(struct macio_dev *mdev,
1131 const struct of_device_id *match)
1132 {
1133 struct pata_macio_priv *priv;
1134 resource_size_t tfregs, dmaregs = 0;
1135 unsigned long irq;
1136 int rc;
1137
1138 /* Check for broken device-trees */
1139 if (macio_resource_count(mdev) == 0) {
1140 dev_err(&mdev->ofdev.dev,
1141 "No addresses for controller\n");
1142 return -ENXIO;
1143 }
1144
1145 /* Enable managed resources */
1146 macio_enable_devres(mdev);
1147
1148 /* Allocate and init private data structure */
1149 priv = devm_kzalloc(&mdev->ofdev.dev,
1150 sizeof(struct pata_macio_priv), GFP_KERNEL);
1151 if (!priv)
1152 return -ENOMEM;
1153
1154 priv->node = of_node_get(mdev->ofdev.dev.of_node);
1155 priv->mdev = mdev;
1156 priv->dev = &mdev->ofdev.dev;
1157
1158 /* Request memory resource for taskfile registers */
1159 if (macio_request_resource(mdev, 0, "pata-macio")) {
1160 dev_err(&mdev->ofdev.dev,
1161 "Cannot obtain taskfile resource\n");
1162 return -EBUSY;
1163 }
1164 tfregs = macio_resource_start(mdev, 0);
1165
1166 /* Request resources for DMA registers if any */
1167 if (macio_resource_count(mdev) >= 2) {
1168 if (macio_request_resource(mdev, 1, "pata-macio-dma"))
1169 dev_err(&mdev->ofdev.dev,
1170 "Cannot obtain DMA resource\n");
1171 else
1172 dmaregs = macio_resource_start(mdev, 1);
1173 }
1174
1175 /*
1176 * Fixup missing IRQ for some old implementations with broken
1177 * device-trees.
1178 *
1179 * This is a bit bogus, it should be fixed in the device-tree itself,
1180 * via the existing macio fixups, based on the type of interrupt
1181 * controller in the machine. However, I have no test HW for this case,
1182 * and this trick works well enough on those old machines...
1183 */
1184 if (macio_irq_count(mdev) == 0) {
1185 dev_warn(&mdev->ofdev.dev,
1186 "No interrupts for controller, using 13\n");
1187 irq = irq_create_mapping(NULL, 13);
1188 } else
1189 irq = macio_irq(mdev, 0);
1190
1191 /* Prevvent media bay callbacks until fully registered */
1192 lock_media_bay(priv->mdev->media_bay);
1193
1194 /* Get register addresses and call common initialization */
1195 rc = pata_macio_common_init(priv,
1196 tfregs, /* Taskfile regs */
1197 dmaregs, /* DBDMA regs */
1198 0, /* Feature control */
1199 irq);
1200 unlock_media_bay(priv->mdev->media_bay);
1201
1202 return rc;
1203 }
1204
pata_macio_detach(struct macio_dev * mdev)1205 static void pata_macio_detach(struct macio_dev *mdev)
1206 {
1207 struct ata_host *host = macio_get_drvdata(mdev);
1208 struct pata_macio_priv *priv = host->private_data;
1209
1210 lock_media_bay(priv->mdev->media_bay);
1211
1212 /* Make sure the mediabay callback doesn't try to access
1213 * dead stuff
1214 */
1215 priv->host->private_data = NULL;
1216
1217 ata_host_detach(host);
1218
1219 unlock_media_bay(priv->mdev->media_bay);
1220 }
1221
1222 #ifdef CONFIG_PM_SLEEP
pata_macio_suspend(struct macio_dev * mdev,pm_message_t mesg)1223 static int pata_macio_suspend(struct macio_dev *mdev, pm_message_t mesg)
1224 {
1225 struct ata_host *host = macio_get_drvdata(mdev);
1226
1227 return pata_macio_do_suspend(host->private_data, mesg);
1228 }
1229
pata_macio_resume(struct macio_dev * mdev)1230 static int pata_macio_resume(struct macio_dev *mdev)
1231 {
1232 struct ata_host *host = macio_get_drvdata(mdev);
1233
1234 return pata_macio_do_resume(host->private_data);
1235 }
1236 #endif /* CONFIG_PM_SLEEP */
1237
1238 #ifdef CONFIG_PMAC_MEDIABAY
pata_macio_mb_event(struct macio_dev * mdev,int mb_state)1239 static void pata_macio_mb_event(struct macio_dev* mdev, int mb_state)
1240 {
1241 struct ata_host *host = macio_get_drvdata(mdev);
1242 struct ata_port *ap;
1243 struct ata_eh_info *ehi;
1244 struct ata_device *dev;
1245 unsigned long flags;
1246
1247 if (!host || !host->private_data)
1248 return;
1249 ap = host->ports[0];
1250 spin_lock_irqsave(ap->lock, flags);
1251 ehi = &ap->link.eh_info;
1252 if (mb_state == MB_CD) {
1253 ata_ehi_push_desc(ehi, "mediabay plug");
1254 ata_ehi_hotplugged(ehi);
1255 ata_port_freeze(ap);
1256 } else {
1257 ata_ehi_push_desc(ehi, "mediabay unplug");
1258 ata_for_each_dev(dev, &ap->link, ALL)
1259 dev->flags |= ATA_DFLAG_DETACH;
1260 ata_port_abort(ap);
1261 }
1262 spin_unlock_irqrestore(ap->lock, flags);
1263
1264 }
1265 #endif /* CONFIG_PMAC_MEDIABAY */
1266
1267
pata_macio_pci_attach(struct pci_dev * pdev,const struct pci_device_id * id)1268 static int pata_macio_pci_attach(struct pci_dev *pdev,
1269 const struct pci_device_id *id)
1270 {
1271 struct pata_macio_priv *priv;
1272 struct device_node *np;
1273 resource_size_t rbase;
1274
1275 /* We cannot use a MacIO controller without its OF device node */
1276 np = pci_device_to_OF_node(pdev);
1277 if (np == NULL) {
1278 dev_err(&pdev->dev,
1279 "Cannot find OF device node for controller\n");
1280 return -ENODEV;
1281 }
1282
1283 /* Check that it can be enabled */
1284 if (pcim_enable_device(pdev)) {
1285 dev_err(&pdev->dev,
1286 "Cannot enable controller PCI device\n");
1287 return -ENXIO;
1288 }
1289
1290 /* Allocate and init private data structure */
1291 priv = devm_kzalloc(&pdev->dev,
1292 sizeof(struct pata_macio_priv), GFP_KERNEL);
1293 if (!priv)
1294 return -ENOMEM;
1295
1296 priv->node = of_node_get(np);
1297 priv->pdev = pdev;
1298 priv->dev = &pdev->dev;
1299
1300 /* Get MMIO regions */
1301 if (pci_request_regions(pdev, "pata-macio")) {
1302 dev_err(&pdev->dev,
1303 "Cannot obtain PCI resources\n");
1304 return -EBUSY;
1305 }
1306
1307 /* Get register addresses and call common initialization */
1308 rbase = pci_resource_start(pdev, 0);
1309 if (pata_macio_common_init(priv,
1310 rbase + 0x2000, /* Taskfile regs */
1311 rbase + 0x1000, /* DBDMA regs */
1312 rbase, /* Feature control */
1313 pdev->irq))
1314 return -ENXIO;
1315
1316 return 0;
1317 }
1318
pata_macio_pci_detach(struct pci_dev * pdev)1319 static void pata_macio_pci_detach(struct pci_dev *pdev)
1320 {
1321 struct ata_host *host = pci_get_drvdata(pdev);
1322
1323 ata_host_detach(host);
1324 }
1325
1326 #ifdef CONFIG_PM_SLEEP
pata_macio_pci_suspend(struct pci_dev * pdev,pm_message_t mesg)1327 static int pata_macio_pci_suspend(struct pci_dev *pdev, pm_message_t mesg)
1328 {
1329 struct ata_host *host = pci_get_drvdata(pdev);
1330
1331 return pata_macio_do_suspend(host->private_data, mesg);
1332 }
1333
pata_macio_pci_resume(struct pci_dev * pdev)1334 static int pata_macio_pci_resume(struct pci_dev *pdev)
1335 {
1336 struct ata_host *host = pci_get_drvdata(pdev);
1337
1338 return pata_macio_do_resume(host->private_data);
1339 }
1340 #endif /* CONFIG_PM_SLEEP */
1341
1342 static const struct of_device_id pata_macio_match[] =
1343 {
1344 { .name = "IDE", },
1345 { .name = "ATA", },
1346 { .type = "ide", },
1347 { .type = "ata", },
1348 { /* sentinel */ }
1349 };
1350 MODULE_DEVICE_TABLE(of, pata_macio_match);
1351
1352 static struct macio_driver pata_macio_driver =
1353 {
1354 .driver = {
1355 .name = "pata-macio",
1356 .owner = THIS_MODULE,
1357 .of_match_table = pata_macio_match,
1358 },
1359 .probe = pata_macio_attach,
1360 .remove = pata_macio_detach,
1361 #ifdef CONFIG_PM_SLEEP
1362 .suspend = pata_macio_suspend,
1363 .resume = pata_macio_resume,
1364 #endif
1365 #ifdef CONFIG_PMAC_MEDIABAY
1366 .mediabay_event = pata_macio_mb_event,
1367 #endif
1368 };
1369
1370 static const struct pci_device_id pata_macio_pci_match[] = {
1371 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_UNI_N_ATA), 0 },
1372 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_IPID_ATA100), 0 },
1373 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_K2_ATA100), 0 },
1374 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_SH_ATA), 0 },
1375 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_IPID2_ATA), 0 },
1376 {},
1377 };
1378
1379 static struct pci_driver pata_macio_pci_driver = {
1380 .name = "pata-pci-macio",
1381 .id_table = pata_macio_pci_match,
1382 .probe = pata_macio_pci_attach,
1383 .remove = pata_macio_pci_detach,
1384 #ifdef CONFIG_PM_SLEEP
1385 .suspend = pata_macio_pci_suspend,
1386 .resume = pata_macio_pci_resume,
1387 #endif
1388 };
1389 MODULE_DEVICE_TABLE(pci, pata_macio_pci_match);
1390
1391
pata_macio_init(void)1392 static int __init pata_macio_init(void)
1393 {
1394 int rc;
1395
1396 if (!machine_is(powermac))
1397 return -ENODEV;
1398
1399 rc = pci_register_driver(&pata_macio_pci_driver);
1400 if (rc)
1401 return rc;
1402 rc = macio_register_driver(&pata_macio_driver);
1403 if (rc) {
1404 pci_unregister_driver(&pata_macio_pci_driver);
1405 return rc;
1406 }
1407 return 0;
1408 }
1409
pata_macio_exit(void)1410 static void __exit pata_macio_exit(void)
1411 {
1412 macio_unregister_driver(&pata_macio_driver);
1413 pci_unregister_driver(&pata_macio_pci_driver);
1414 }
1415
1416 module_init(pata_macio_init);
1417 module_exit(pata_macio_exit);
1418
1419 MODULE_AUTHOR("Benjamin Herrenschmidt");
1420 MODULE_DESCRIPTION("Apple MacIO PATA driver");
1421 MODULE_LICENSE("GPL");
1422 MODULE_VERSION(DRV_VERSION);
1423