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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * Copyright (C) 1997-1998 Mark Lord <mlord@pobox.com>
3 * Copyright (C) 1998 Eddie C. Dost <ecd@skynet.be>
4 * Copyright (C) 1999-2000 Andre Hedrick <andre@linux-ide.org>
5 * Copyright (C) 2004 Grant Grundler <grundler at parisc-linux.org>
6 *
7 * Inspired by an earlier effort from David S. Miller <davem@redhat.com>
8 */
9
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#include <linux/module.h>
11#include <linux/types.h>
12#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#include <linux/interrupt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <linux/pci.h>
15#include <linux/delay.h>
16#include <linux/ide.h>
17#include <linux/init.h>
18
19#include <asm/io.h>
20
Bartlomiej Zolnierkiewiczced3ec82008-07-24 22:53:32 +020021#define DRV_NAME "ns87415"
22
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#ifdef CONFIG_SUPERIO
24/* SUPERIO 87560 is a PoS chip that NatSem denies exists.
25 * Unfortunately, it's built-in on all Astro-based PA-RISC workstations
26 * which use the integrated NS87514 cell for CD-ROM support.
27 * i.e we have to support for CD-ROM installs.
28 * See drivers/parisc/superio.c for more gory details.
29 */
30#include <asm/superio.h>
31
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#define SUPERIO_IDE_MAX_RETRIES 25
33
34/* Because of a defect in Super I/O, all reads of the PCI DMA status
35 * registers, IDE status register and the IDE select register need to be
36 * retried
37 */
38static u8 superio_ide_inb (unsigned long port)
39{
Bartlomiej Zolnierkiewicz761052e2008-07-23 19:55:54 +020040 u8 tmp;
41 int retries = SUPERIO_IDE_MAX_RETRIES;
Linus Torvalds1da177e2005-04-16 15:20:36 -070042
Bartlomiej Zolnierkiewicz761052e2008-07-23 19:55:54 +020043 /* printk(" [ reading port 0x%x with retry ] ", port); */
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
Bartlomiej Zolnierkiewicz761052e2008-07-23 19:55:54 +020045 do {
46 tmp = inb(port);
47 if (tmp == 0)
48 udelay(50);
49 } while (tmp == 0 && retries-- > 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
Bartlomiej Zolnierkiewicz761052e2008-07-23 19:55:54 +020051 return tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -070052}
53
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +020054static u8 superio_read_status(ide_hwif_t *hwif)
55{
56 return superio_ide_inb(hwif->io_ports.status_addr);
57}
58
Sergei Shtylyov592b5312009-01-06 17:21:02 +010059static u8 superio_dma_sff_read_status(ide_hwif_t *hwif)
Bartlomiej Zolnierkiewiczb2f951a2008-07-23 19:55:50 +020060{
Bartlomiej Zolnierkiewiczcab7f8e2008-07-23 19:55:51 +020061 return superio_ide_inb(hwif->dma_base + ATA_DMA_STATUS);
Bartlomiej Zolnierkiewiczb2f951a2008-07-23 19:55:50 +020062}
63
Bartlomiej Zolnierkiewiczea23b8b2008-04-28 23:44:40 +020064static void superio_tf_read(ide_drive_t *drive, ide_task_t *task)
65{
66 struct ide_io_ports *io_ports = &drive->hwif->io_ports;
67 struct ide_taskfile *tf = &task->tf;
68
69 if (task->tf_flags & IDE_TFLAG_IN_DATA) {
70 u16 data = inw(io_ports->data_addr);
71
72 tf->data = data & 0xff;
73 tf->hob_data = (data >> 8) & 0xff;
74 }
75
76 /* be sure we're looking at the low order bits */
Bartlomiej Zolnierkiewiczff074882008-07-15 21:21:50 +020077 outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr);
Bartlomiej Zolnierkiewiczea23b8b2008-04-28 23:44:40 +020078
Bartlomiej Zolnierkiewicz92eb4382008-07-23 19:55:53 +020079 if (task->tf_flags & IDE_TFLAG_IN_FEATURE)
80 tf->feature = inb(io_ports->feature_addr);
Bartlomiej Zolnierkiewiczea23b8b2008-04-28 23:44:40 +020081 if (task->tf_flags & IDE_TFLAG_IN_NSECT)
82 tf->nsect = inb(io_ports->nsect_addr);
83 if (task->tf_flags & IDE_TFLAG_IN_LBAL)
84 tf->lbal = inb(io_ports->lbal_addr);
85 if (task->tf_flags & IDE_TFLAG_IN_LBAM)
86 tf->lbam = inb(io_ports->lbam_addr);
87 if (task->tf_flags & IDE_TFLAG_IN_LBAH)
88 tf->lbah = inb(io_ports->lbah_addr);
89 if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
90 tf->device = superio_ide_inb(io_ports->device_addr);
91
92 if (task->tf_flags & IDE_TFLAG_LBA48) {
Bartlomiej Zolnierkiewiczff074882008-07-15 21:21:50 +020093 outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr);
Bartlomiej Zolnierkiewiczea23b8b2008-04-28 23:44:40 +020094
95 if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
96 tf->hob_feature = inb(io_ports->feature_addr);
97 if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
98 tf->hob_nsect = inb(io_ports->nsect_addr);
99 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
100 tf->hob_lbal = inb(io_ports->lbal_addr);
101 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
102 tf->hob_lbam = inb(io_ports->lbam_addr);
103 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
104 tf->hob_lbah = inb(io_ports->lbah_addr);
105 }
106}
107
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200108static const struct ide_tp_ops superio_tp_ops = {
109 .exec_command = ide_exec_command,
110 .read_status = superio_read_status,
111 .read_altstatus = ide_read_altstatus,
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200112
113 .set_irq = ide_set_irq,
114
115 .tf_load = ide_tf_load,
116 .tf_read = superio_tf_read,
117
118 .input_data = ide_input_data,
119 .output_data = ide_output_data,
120};
121
122static void __devinit superio_init_iops(struct hwif_s *hwif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123{
Bartlomiej Zolnierkiewicz36501652008-02-01 23:09:31 +0100124 struct pci_dev *pdev = to_pci_dev(hwif->dev);
Bartlomiej Zolnierkiewicz761052e2008-07-23 19:55:54 +0200125 u32 dma_stat;
Bartlomiej Zolnierkiewicz36501652008-02-01 23:09:31 +0100126 u8 port = hwif->channel, tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127
Bartlomiej Zolnierkiewicz761052e2008-07-23 19:55:54 +0200128 dma_stat = (pci_resource_start(pdev, 4) & ~3) + (!port ? 2 : 0xa);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129
130 /* Clear error/interrupt, enable dma */
Bartlomiej Zolnierkiewicz761052e2008-07-23 19:55:54 +0200131 tmp = superio_ide_inb(dma_stat);
132 outb(tmp | 0x66, dma_stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133}
Sergei Shtylyov592b5312009-01-06 17:21:02 +0100134#else
135#define superio_dma_sff_read_status ide_dma_sff_read_status
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136#endif
137
138static unsigned int ns87415_count = 0, ns87415_control[MAX_HWIFS] = { 0 };
139
140/*
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200141 * This routine either enables/disables (according to IDE_DFLAG_PRESENT)
Bartlomiej Zolnierkiewicz898ec222009-01-06 17:20:52 +0100142 * the IRQ associated with the port,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 * and selects either PIO or DMA handshaking for the next I/O operation.
144 */
145static void ns87415_prepare_drive (ide_drive_t *drive, unsigned int use_dma)
146{
Bartlomiej Zolnierkiewicz898ec222009-01-06 17:20:52 +0100147 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz36501652008-02-01 23:09:31 +0100148 struct pci_dev *dev = to_pci_dev(hwif->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 unsigned int bit, other, new, *old = (unsigned int *) hwif->select_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 unsigned long flags;
151
152 local_irq_save(flags);
153 new = *old;
154
155 /* Adjust IRQ enable bit */
156 bit = 1 << (8 + hwif->channel);
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200157
158 if (drive->dev_flags & IDE_DFLAG_PRESENT)
159 new &= ~bit;
160 else
161 new |= bit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162
163 /* Select PIO or DMA, DMA may only be selected for one drive/channel. */
Bartlomiej Zolnierkiewicz123995b2008-10-13 21:39:40 +0200164 bit = 1 << (20 + (drive->dn & 1) + (hwif->channel << 1));
165 other = 1 << (20 + (1 - (drive->dn & 1)) + (hwif->channel << 1));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 new = use_dma ? ((new & ~other) | bit) : (new & ~bit);
167
168 if (new != *old) {
169 unsigned char stat;
170
171 /*
172 * Don't change DMA engine settings while Write Buffers
173 * are busy.
174 */
175 (void) pci_read_config_byte(dev, 0x43, &stat);
176 while (stat & 0x03) {
177 udelay(1);
178 (void) pci_read_config_byte(dev, 0x43, &stat);
179 }
180
181 *old = new;
182 (void) pci_write_config_dword(dev, 0x40, new);
183
184 /*
185 * And let things settle...
186 */
187 udelay(10);
188 }
189
190 local_irq_restore(flags);
191}
192
193static void ns87415_selectproc (ide_drive_t *drive)
194{
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200195 ns87415_prepare_drive(drive,
196 !!(drive->dev_flags & IDE_DFLAG_USING_DMA));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197}
198
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200199static int ns87415_dma_end(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200{
Bartlomiej Zolnierkiewicz898ec222009-01-06 17:20:52 +0100201 ide_hwif_t *hwif = drive->hwif;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 u8 dma_stat = 0, dma_cmd = 0;
203
204 drive->waiting_for_dma = 0;
Sergei Shtylyov592b5312009-01-06 17:21:02 +0100205 dma_stat = hwif->dma_ops->dma_sff_read_status(hwif);
Bartlomiej Zolnierkiewiczcab7f8e2008-07-23 19:55:51 +0200206 /* get DMA command mode */
207 dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 /* stop DMA */
Bartlomiej Zolnierkiewiczcab7f8e2008-07-23 19:55:51 +0200209 outb(dma_cmd & ~1, hwif->dma_base + ATA_DMA_CMD);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 /* from ERRATA: clear the INTR & ERROR bits */
Bartlomiej Zolnierkiewiczcab7f8e2008-07-23 19:55:51 +0200211 dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD);
212 outb(dma_cmd | 6, hwif->dma_base + ATA_DMA_CMD);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 /* and free any DMA resources */
214 ide_destroy_dmatable(drive);
215 /* verify good DMA status */
216 return (dma_stat & 7) != 4;
217}
218
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200219static int ns87415_dma_setup(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220{
221 /* select DMA xfer */
222 ns87415_prepare_drive(drive, 1);
223 if (!ide_dma_setup(drive))
224 return 0;
225 /* DMA failed: select PIO xfer */
226 ns87415_prepare_drive(drive, 0);
227 return 1;
228}
229
Herbert Xuc20530e2005-07-03 16:31:04 +0200230static void __devinit init_hwif_ns87415 (ide_hwif_t *hwif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231{
Bartlomiej Zolnierkiewicz36501652008-02-01 23:09:31 +0100232 struct pci_dev *dev = to_pci_dev(hwif->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 unsigned int ctrl, using_inta;
234 u8 progif;
235#ifdef __sparc_v9__
236 int timeout;
237 u8 stat;
238#endif
239
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 /*
241 * We cannot probe for IRQ: both ports share common IRQ on INTA.
242 * Also, leave IRQ masked during drive probing, to prevent infinite
243 * interrupts from a potentially floating INTA..
244 *
245 * IRQs get unmasked in selectproc when drive is first used.
246 */
247 (void) pci_read_config_dword(dev, 0x40, &ctrl);
248 (void) pci_read_config_byte(dev, 0x09, &progif);
249 /* is irq in "native" mode? */
250 using_inta = progif & (1 << (hwif->channel << 1));
251 if (!using_inta)
252 using_inta = ctrl & (1 << (4 + hwif->channel));
253 if (hwif->mate) {
254 hwif->select_data = hwif->mate->select_data;
255 } else {
256 hwif->select_data = (unsigned long)
257 &ns87415_control[ns87415_count++];
258 ctrl |= (1 << 8) | (1 << 9); /* mask both IRQs */
259 if (using_inta)
260 ctrl &= ~(1 << 6); /* unmask INTA */
261 *((unsigned int *)hwif->select_data) = ctrl;
262 (void) pci_write_config_dword(dev, 0x40, ctrl);
263
264 /*
265 * Set prefetch size to 512 bytes for both ports,
266 * but don't turn on/off prefetching here.
267 */
268 pci_write_config_byte(dev, 0x55, 0xee);
269
270#ifdef __sparc_v9__
271 /*
Bartlomiej Zolnierkiewicz9d501522008-02-01 23:09:36 +0100272 * XXX: Reset the device, if we don't it will not respond to
273 * SELECT_DRIVE() properly during first ide_probe_port().
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274 */
275 timeout = 10000;
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200276 outb(12, hwif->io_ports.ctl_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 udelay(10);
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200278 outb(8, hwif->io_ports.ctl_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 do {
280 udelay(50);
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200281 stat = hwif->tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200282 if (stat == 0xff)
283 break;
284 } while ((stat & ATA_BUSY) && --timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285#endif
286 }
287
288 if (!using_inta)
Bartlomiej Zolnierkiewicza861beb2008-07-08 19:27:22 +0200289 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 else if (!hwif->irq && hwif->mate && hwif->mate->irq)
291 hwif->irq = hwif->mate->irq; /* share IRQ with mate */
292
293 if (!hwif->dma_base)
294 return;
295
Bartlomiej Zolnierkiewiczcab7f8e2008-07-23 19:55:51 +0200296 outb(0x60, hwif->dma_base + ATA_DMA_STATUS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297}
298
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200299static const struct ide_port_ops ns87415_port_ops = {
300 .selectproc = ns87415_selectproc,
301};
302
Bartlomiej Zolnierkiewiczf37afda2008-04-26 22:25:24 +0200303static const struct ide_dma_ops ns87415_dma_ops = {
304 .dma_host_set = ide_dma_host_set,
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200305 .dma_setup = ns87415_dma_setup,
Bartlomiej Zolnierkiewiczf37afda2008-04-26 22:25:24 +0200306 .dma_exec_cmd = ide_dma_exec_cmd,
307 .dma_start = ide_dma_start,
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200308 .dma_end = ns87415_dma_end,
Bartlomiej Zolnierkiewiczf37afda2008-04-26 22:25:24 +0200309 .dma_test_irq = ide_dma_test_irq,
310 .dma_lost_irq = ide_dma_lost_irq,
311 .dma_timeout = ide_dma_timeout,
Sergei Shtylyov592b5312009-01-06 17:21:02 +0100312 .dma_sff_read_status = superio_dma_sff_read_status,
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200313};
314
Bartlomiej Zolnierkiewicz85620432007-10-20 00:32:34 +0200315static const struct ide_port_info ns87415_chipset __devinitdata = {
Bartlomiej Zolnierkiewiczced3ec82008-07-24 22:53:32 +0200316 .name = DRV_NAME,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 .init_hwif = init_hwif_ns87415,
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200318 .port_ops = &ns87415_port_ops,
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200319 .dma_ops = &ns87415_dma_ops,
Bartlomiej Zolnierkiewicz33c10022007-10-19 00:30:06 +0200320 .host_flags = IDE_HFLAG_TRUST_BIOS_FOR_DMA |
Bartlomiej Zolnierkiewicz5e71d9c2008-04-26 17:36:35 +0200321 IDE_HFLAG_NO_ATAPI_DMA,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322};
323
324static int __devinit ns87415_init_one(struct pci_dev *dev, const struct pci_device_id *id)
325{
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200326 struct ide_port_info d = ns87415_chipset;
327
328#ifdef CONFIG_SUPERIO
329 if (PCI_SLOT(dev->devfn) == 0xE) {
330 /* Built-in - assume it's under superio. */
331 d.init_iops = superio_init_iops;
332 d.tp_ops = &superio_tp_ops;
333 }
334#endif
Bartlomiej Zolnierkiewicz6cdf6eb2008-07-24 22:53:14 +0200335 return ide_pci_init_one(dev, &d, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336}
337
Bartlomiej Zolnierkiewicz9cbcc5e2007-10-16 22:29:56 +0200338static const struct pci_device_id ns87415_pci_tbl[] = {
339 { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_87415), 0 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 { 0, },
341};
342MODULE_DEVICE_TABLE(pci, ns87415_pci_tbl);
343
Bartlomiej Zolnierkiewicza9ab09e2008-10-13 21:39:41 +0200344static struct pci_driver ns87415_pci_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 .name = "NS87415_IDE",
346 .id_table = ns87415_pci_tbl,
347 .probe = ns87415_init_one,
Bartlomiej Zolnierkiewiczaa6e5182008-07-24 22:53:23 +0200348 .remove = ide_pci_remove,
Bartlomiej Zolnierkiewiczfeb22b72008-10-10 22:39:32 +0200349 .suspend = ide_pci_suspend,
350 .resume = ide_pci_resume,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351};
352
Bartlomiej Zolnierkiewicz82ab1ee2007-01-27 13:46:56 +0100353static int __init ns87415_ide_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354{
Bartlomiej Zolnierkiewicza9ab09e2008-10-13 21:39:41 +0200355 return ide_pci_register_driver(&ns87415_pci_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356}
357
Bartlomiej Zolnierkiewiczaa6e5182008-07-24 22:53:23 +0200358static void __exit ns87415_ide_exit(void)
359{
Bartlomiej Zolnierkiewicza9ab09e2008-10-13 21:39:41 +0200360 pci_unregister_driver(&ns87415_pci_driver);
Bartlomiej Zolnierkiewiczaa6e5182008-07-24 22:53:23 +0200361}
362
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363module_init(ns87415_ide_init);
Bartlomiej Zolnierkiewiczaa6e5182008-07-24 22:53:23 +0200364module_exit(ns87415_ide_exit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365
366MODULE_AUTHOR("Mark Lord, Eddie Dost, Andre Hedrick");
367MODULE_DESCRIPTION("PCI driver module for NS87415 IDE");
368MODULE_LICENSE("GPL");