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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 | 2 | /* |
1da177e4 LT |
3 | * Copyright (C) 1997-1998 Mark Lord <mlord@pobox.com> |
4 | * Copyright (C) 1998 Eddie C. Dost <ecd@skynet.be> | |
5 | * Copyright (C) 1999-2000 Andre Hedrick <andre@linux-ide.org> | |
6 | * Copyright (C) 2004 Grant Grundler <grundler at parisc-linux.org> | |
7 | * | |
8 | * Inspired by an earlier effort from David S. Miller <davem@redhat.com> | |
9 | */ | |
10 | ||
1da177e4 LT |
11 | #include <linux/module.h> |
12 | #include <linux/types.h> | |
13 | #include <linux/kernel.h> | |
1da177e4 | 14 | #include <linux/interrupt.h> |
1da177e4 LT |
15 | #include <linux/pci.h> |
16 | #include <linux/delay.h> | |
17 | #include <linux/ide.h> | |
18 | #include <linux/init.h> | |
19 | ||
20 | #include <asm/io.h> | |
21 | ||
ced3ec8a BZ |
22 | #define DRV_NAME "ns87415" |
23 | ||
1da177e4 LT |
24 | #ifdef CONFIG_SUPERIO |
25 | /* SUPERIO 87560 is a PoS chip that NatSem denies exists. | |
26 | * Unfortunately, it's built-in on all Astro-based PA-RISC workstations | |
27 | * which use the integrated NS87514 cell for CD-ROM support. | |
28 | * i.e we have to support for CD-ROM installs. | |
29 | * See drivers/parisc/superio.c for more gory details. | |
30 | */ | |
31 | #include <asm/superio.h> | |
32 | ||
1da177e4 LT |
33 | #define SUPERIO_IDE_MAX_RETRIES 25 |
34 | ||
35 | /* Because of a defect in Super I/O, all reads of the PCI DMA status | |
36 | * registers, IDE status register and the IDE select register need to be | |
37 | * retried | |
38 | */ | |
39 | static u8 superio_ide_inb (unsigned long port) | |
40 | { | |
761052e6 BZ |
41 | u8 tmp; |
42 | int retries = SUPERIO_IDE_MAX_RETRIES; | |
43 | ||
44 | /* printk(" [ reading port 0x%x with retry ] ", port); */ | |
1da177e4 | 45 | |
761052e6 BZ |
46 | do { |
47 | tmp = inb(port); | |
48 | if (tmp == 0) | |
49 | udelay(50); | |
50 | } while (tmp == 0 && retries-- > 0); | |
51 | ||
52 | return tmp; | |
1da177e4 LT |
53 | } |
54 | ||
b73c7ee2 BZ |
55 | static u8 superio_read_status(ide_hwif_t *hwif) |
56 | { | |
57 | return superio_ide_inb(hwif->io_ports.status_addr); | |
58 | } | |
59 | ||
592b5315 | 60 | static u8 superio_dma_sff_read_status(ide_hwif_t *hwif) |
b2f951aa | 61 | { |
cab7f8ed | 62 | return superio_ide_inb(hwif->dma_base + ATA_DMA_STATUS); |
b2f951aa BZ |
63 | } |
64 | ||
3153c26b SS |
65 | static void superio_tf_read(ide_drive_t *drive, struct ide_taskfile *tf, |
66 | u8 valid) | |
ea23b8ba BZ |
67 | { |
68 | struct ide_io_ports *io_ports = &drive->hwif->io_ports; | |
ea23b8ba | 69 | |
60f85019 | 70 | if (valid & IDE_VALID_ERROR) |
67625119 | 71 | tf->error = inb(io_ports->feature_addr); |
60f85019 | 72 | if (valid & IDE_VALID_NSECT) |
ea23b8ba | 73 | tf->nsect = inb(io_ports->nsect_addr); |
60f85019 | 74 | if (valid & IDE_VALID_LBAL) |
ea23b8ba | 75 | tf->lbal = inb(io_ports->lbal_addr); |
60f85019 | 76 | if (valid & IDE_VALID_LBAM) |
ea23b8ba | 77 | tf->lbam = inb(io_ports->lbam_addr); |
60f85019 | 78 | if (valid & IDE_VALID_LBAH) |
ea23b8ba | 79 | tf->lbah = inb(io_ports->lbah_addr); |
60f85019 | 80 | if (valid & IDE_VALID_DEVICE) |
ea23b8ba | 81 | tf->device = superio_ide_inb(io_ports->device_addr); |
ea23b8ba BZ |
82 | } |
83 | ||
abb596b2 SS |
84 | static void ns87415_dev_select(ide_drive_t *drive); |
85 | ||
374e042c BZ |
86 | static const struct ide_tp_ops superio_tp_ops = { |
87 | .exec_command = ide_exec_command, | |
88 | .read_status = superio_read_status, | |
89 | .read_altstatus = ide_read_altstatus, | |
ecf3a31d | 90 | .write_devctl = ide_write_devctl, |
374e042c | 91 | |
abb596b2 | 92 | .dev_select = ns87415_dev_select, |
374e042c BZ |
93 | .tf_load = ide_tf_load, |
94 | .tf_read = superio_tf_read, | |
95 | ||
96 | .input_data = ide_input_data, | |
97 | .output_data = ide_output_data, | |
98 | }; | |
99 | ||
fe31edc8 | 100 | static void superio_init_iops(struct hwif_s *hwif) |
1da177e4 | 101 | { |
36501650 | 102 | struct pci_dev *pdev = to_pci_dev(hwif->dev); |
761052e6 | 103 | u32 dma_stat; |
36501650 | 104 | u8 port = hwif->channel, tmp; |
1da177e4 | 105 | |
761052e6 | 106 | dma_stat = (pci_resource_start(pdev, 4) & ~3) + (!port ? 2 : 0xa); |
1da177e4 LT |
107 | |
108 | /* Clear error/interrupt, enable dma */ | |
761052e6 BZ |
109 | tmp = superio_ide_inb(dma_stat); |
110 | outb(tmp | 0x66, dma_stat); | |
1da177e4 | 111 | } |
592b5315 SS |
112 | #else |
113 | #define superio_dma_sff_read_status ide_dma_sff_read_status | |
1da177e4 LT |
114 | #endif |
115 | ||
116 | static unsigned int ns87415_count = 0, ns87415_control[MAX_HWIFS] = { 0 }; | |
117 | ||
118 | /* | |
97100fc8 | 119 | * This routine either enables/disables (according to IDE_DFLAG_PRESENT) |
898ec223 | 120 | * the IRQ associated with the port, |
1da177e4 LT |
121 | * and selects either PIO or DMA handshaking for the next I/O operation. |
122 | */ | |
123 | static void ns87415_prepare_drive (ide_drive_t *drive, unsigned int use_dma) | |
124 | { | |
898ec223 | 125 | ide_hwif_t *hwif = drive->hwif; |
36501650 | 126 | struct pci_dev *dev = to_pci_dev(hwif->dev); |
1da177e4 | 127 | unsigned int bit, other, new, *old = (unsigned int *) hwif->select_data; |
1da177e4 LT |
128 | unsigned long flags; |
129 | ||
130 | local_irq_save(flags); | |
131 | new = *old; | |
132 | ||
133 | /* Adjust IRQ enable bit */ | |
134 | bit = 1 << (8 + hwif->channel); | |
97100fc8 BZ |
135 | |
136 | if (drive->dev_flags & IDE_DFLAG_PRESENT) | |
137 | new &= ~bit; | |
138 | else | |
139 | new |= bit; | |
1da177e4 LT |
140 | |
141 | /* Select PIO or DMA, DMA may only be selected for one drive/channel. */ | |
123995b9 BZ |
142 | bit = 1 << (20 + (drive->dn & 1) + (hwif->channel << 1)); |
143 | other = 1 << (20 + (1 - (drive->dn & 1)) + (hwif->channel << 1)); | |
1da177e4 LT |
144 | new = use_dma ? ((new & ~other) | bit) : (new & ~bit); |
145 | ||
146 | if (new != *old) { | |
147 | unsigned char stat; | |
148 | ||
149 | /* | |
150 | * Don't change DMA engine settings while Write Buffers | |
151 | * are busy. | |
152 | */ | |
153 | (void) pci_read_config_byte(dev, 0x43, &stat); | |
154 | while (stat & 0x03) { | |
155 | udelay(1); | |
156 | (void) pci_read_config_byte(dev, 0x43, &stat); | |
157 | } | |
158 | ||
159 | *old = new; | |
160 | (void) pci_write_config_dword(dev, 0x40, new); | |
161 | ||
162 | /* | |
163 | * And let things settle... | |
164 | */ | |
165 | udelay(10); | |
166 | } | |
167 | ||
168 | local_irq_restore(flags); | |
169 | } | |
170 | ||
abb596b2 | 171 | static void ns87415_dev_select(ide_drive_t *drive) |
1da177e4 | 172 | { |
97100fc8 BZ |
173 | ns87415_prepare_drive(drive, |
174 | !!(drive->dev_flags & IDE_DFLAG_USING_DMA)); | |
abb596b2 SS |
175 | |
176 | outb(drive->select | ATA_DEVICE_OBS, drive->hwif->io_ports.device_addr); | |
1da177e4 LT |
177 | } |
178 | ||
a6d67ffa BZ |
179 | static void ns87415_dma_start(ide_drive_t *drive) |
180 | { | |
181 | ns87415_prepare_drive(drive, 1); | |
182 | ide_dma_start(drive); | |
183 | } | |
184 | ||
5e37bdc0 | 185 | static int ns87415_dma_end(ide_drive_t *drive) |
1da177e4 | 186 | { |
898ec223 | 187 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 LT |
188 | u8 dma_stat = 0, dma_cmd = 0; |
189 | ||
592b5315 | 190 | dma_stat = hwif->dma_ops->dma_sff_read_status(hwif); |
cab7f8ed BZ |
191 | /* get DMA command mode */ |
192 | dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD); | |
1da177e4 | 193 | /* stop DMA */ |
cab7f8ed | 194 | outb(dma_cmd & ~1, hwif->dma_base + ATA_DMA_CMD); |
1da177e4 | 195 | /* from ERRATA: clear the INTR & ERROR bits */ |
cab7f8ed BZ |
196 | dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD); |
197 | outb(dma_cmd | 6, hwif->dma_base + ATA_DMA_CMD); | |
1da177e4 | 198 | |
1da177e4 | 199 | ns87415_prepare_drive(drive, 0); |
a6d67ffa BZ |
200 | |
201 | /* verify good DMA status */ | |
202 | return (dma_stat & 7) != 4; | |
1da177e4 LT |
203 | } |
204 | ||
fe31edc8 | 205 | static void init_hwif_ns87415 (ide_hwif_t *hwif) |
1da177e4 | 206 | { |
36501650 | 207 | struct pci_dev *dev = to_pci_dev(hwif->dev); |
1da177e4 LT |
208 | unsigned int ctrl, using_inta; |
209 | u8 progif; | |
210 | #ifdef __sparc_v9__ | |
211 | int timeout; | |
212 | u8 stat; | |
213 | #endif | |
214 | ||
1da177e4 LT |
215 | /* |
216 | * We cannot probe for IRQ: both ports share common IRQ on INTA. | |
217 | * Also, leave IRQ masked during drive probing, to prevent infinite | |
218 | * interrupts from a potentially floating INTA.. | |
219 | * | |
abb596b2 | 220 | * IRQs get unmasked in dev_select() when drive is first used. |
1da177e4 LT |
221 | */ |
222 | (void) pci_read_config_dword(dev, 0x40, &ctrl); | |
223 | (void) pci_read_config_byte(dev, 0x09, &progif); | |
224 | /* is irq in "native" mode? */ | |
225 | using_inta = progif & (1 << (hwif->channel << 1)); | |
226 | if (!using_inta) | |
227 | using_inta = ctrl & (1 << (4 + hwif->channel)); | |
228 | if (hwif->mate) { | |
229 | hwif->select_data = hwif->mate->select_data; | |
230 | } else { | |
231 | hwif->select_data = (unsigned long) | |
232 | &ns87415_control[ns87415_count++]; | |
233 | ctrl |= (1 << 8) | (1 << 9); /* mask both IRQs */ | |
234 | if (using_inta) | |
235 | ctrl &= ~(1 << 6); /* unmask INTA */ | |
236 | *((unsigned int *)hwif->select_data) = ctrl; | |
237 | (void) pci_write_config_dword(dev, 0x40, ctrl); | |
238 | ||
239 | /* | |
240 | * Set prefetch size to 512 bytes for both ports, | |
241 | * but don't turn on/off prefetching here. | |
242 | */ | |
243 | pci_write_config_byte(dev, 0x55, 0xee); | |
244 | ||
245 | #ifdef __sparc_v9__ | |
246 | /* | |
9d501529 | 247 | * XXX: Reset the device, if we don't it will not respond to |
fdd88f0a | 248 | * dev_select() properly during first ide_probe_port(). |
1da177e4 LT |
249 | */ |
250 | timeout = 10000; | |
4c3032d8 | 251 | outb(12, hwif->io_ports.ctl_addr); |
1da177e4 | 252 | udelay(10); |
4c3032d8 | 253 | outb(8, hwif->io_ports.ctl_addr); |
1da177e4 LT |
254 | do { |
255 | udelay(50); | |
374e042c | 256 | stat = hwif->tp_ops->read_status(hwif); |
3a7d2484 BZ |
257 | if (stat == 0xff) |
258 | break; | |
259 | } while ((stat & ATA_BUSY) && --timeout); | |
1da177e4 LT |
260 | #endif |
261 | } | |
262 | ||
263 | if (!using_inta) | |
973d9e74 | 264 | hwif->irq = pci_get_legacy_ide_irq(dev, hwif->channel); |
1da177e4 LT |
265 | |
266 | if (!hwif->dma_base) | |
267 | return; | |
268 | ||
cab7f8ed | 269 | outb(0x60, hwif->dma_base + ATA_DMA_STATUS); |
1da177e4 LT |
270 | } |
271 | ||
abb596b2 SS |
272 | static const struct ide_tp_ops ns87415_tp_ops = { |
273 | .exec_command = ide_exec_command, | |
274 | .read_status = ide_read_status, | |
275 | .read_altstatus = ide_read_altstatus, | |
276 | .write_devctl = ide_write_devctl, | |
277 | ||
278 | .dev_select = ns87415_dev_select, | |
279 | .tf_load = ide_tf_load, | |
280 | .tf_read = ide_tf_read, | |
281 | ||
282 | .input_data = ide_input_data, | |
283 | .output_data = ide_output_data, | |
ac95beed BZ |
284 | }; |
285 | ||
f37afdac BZ |
286 | static const struct ide_dma_ops ns87415_dma_ops = { |
287 | .dma_host_set = ide_dma_host_set, | |
a6d67ffa BZ |
288 | .dma_setup = ide_dma_setup, |
289 | .dma_start = ns87415_dma_start, | |
5e37bdc0 | 290 | .dma_end = ns87415_dma_end, |
f37afdac BZ |
291 | .dma_test_irq = ide_dma_test_irq, |
292 | .dma_lost_irq = ide_dma_lost_irq, | |
22117d6e | 293 | .dma_timer_expiry = ide_dma_sff_timer_expiry, |
592b5315 | 294 | .dma_sff_read_status = superio_dma_sff_read_status, |
5e37bdc0 BZ |
295 | }; |
296 | ||
fe31edc8 | 297 | static const struct ide_port_info ns87415_chipset = { |
ced3ec8a | 298 | .name = DRV_NAME, |
1da177e4 | 299 | .init_hwif = init_hwif_ns87415, |
abb596b2 | 300 | .tp_ops = &ns87415_tp_ops, |
5e37bdc0 | 301 | .dma_ops = &ns87415_dma_ops, |
33c1002e | 302 | .host_flags = IDE_HFLAG_TRUST_BIOS_FOR_DMA | |
5e71d9c5 | 303 | IDE_HFLAG_NO_ATAPI_DMA, |
1da177e4 LT |
304 | }; |
305 | ||
fe31edc8 | 306 | static int ns87415_init_one(struct pci_dev *dev, const struct pci_device_id *id) |
1da177e4 | 307 | { |
374e042c BZ |
308 | struct ide_port_info d = ns87415_chipset; |
309 | ||
310 | #ifdef CONFIG_SUPERIO | |
311 | if (PCI_SLOT(dev->devfn) == 0xE) { | |
312 | /* Built-in - assume it's under superio. */ | |
313 | d.init_iops = superio_init_iops; | |
314 | d.tp_ops = &superio_tp_ops; | |
315 | } | |
316 | #endif | |
6cdf6eb3 | 317 | return ide_pci_init_one(dev, &d, NULL); |
1da177e4 LT |
318 | } |
319 | ||
9cbcc5e3 BZ |
320 | static const struct pci_device_id ns87415_pci_tbl[] = { |
321 | { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_87415), 0 }, | |
1da177e4 LT |
322 | { 0, }, |
323 | }; | |
324 | MODULE_DEVICE_TABLE(pci, ns87415_pci_tbl); | |
325 | ||
a9ab09e2 | 326 | static struct pci_driver ns87415_pci_driver = { |
1da177e4 LT |
327 | .name = "NS87415_IDE", |
328 | .id_table = ns87415_pci_tbl, | |
329 | .probe = ns87415_init_one, | |
aa6e518d | 330 | .remove = ide_pci_remove, |
feb22b7f BZ |
331 | .suspend = ide_pci_suspend, |
332 | .resume = ide_pci_resume, | |
1da177e4 LT |
333 | }; |
334 | ||
82ab1eec | 335 | static int __init ns87415_ide_init(void) |
1da177e4 | 336 | { |
a9ab09e2 | 337 | return ide_pci_register_driver(&ns87415_pci_driver); |
1da177e4 LT |
338 | } |
339 | ||
aa6e518d BZ |
340 | static void __exit ns87415_ide_exit(void) |
341 | { | |
a9ab09e2 | 342 | pci_unregister_driver(&ns87415_pci_driver); |
aa6e518d BZ |
343 | } |
344 | ||
1da177e4 | 345 | module_init(ns87415_ide_init); |
aa6e518d | 346 | module_exit(ns87415_ide_exit); |
1da177e4 LT |
347 | |
348 | MODULE_AUTHOR("Mark Lord, Eddie Dost, Andre Hedrick"); | |
349 | MODULE_DESCRIPTION("PCI driver module for NS87415 IDE"); | |
350 | MODULE_LICENSE("GPL"); |