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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/drivers/ide/pci/ns87415.c Version 2.00 Sep. 10, 2002
3 *
4 * Copyright (C) 1997-1998 Mark Lord <mlord@pobox.com>
5 * Copyright (C) 1998 Eddie C. Dost <ecd@skynet.be>
6 * Copyright (C) 1999-2000 Andre Hedrick <andre@linux-ide.org>
7 * Copyright (C) 2004 Grant Grundler <grundler at parisc-linux.org>
8 *
9 * Inspired by an earlier effort from David S. Miller <davem@redhat.com>
10 */
11
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <linux/module.h>
13#include <linux/types.h>
14#include <linux/kernel.h>
15#include <linux/timer.h>
16#include <linux/mm.h>
17#include <linux/ioport.h>
18#include <linux/interrupt.h>
19#include <linux/blkdev.h>
20#include <linux/hdreg.h>
21#include <linux/pci.h>
22#include <linux/delay.h>
23#include <linux/ide.h>
24#include <linux/init.h>
25
26#include <asm/io.h>
27
28#ifdef CONFIG_SUPERIO
29/* SUPERIO 87560 is a PoS chip that NatSem denies exists.
30 * Unfortunately, it's built-in on all Astro-based PA-RISC workstations
31 * which use the integrated NS87514 cell for CD-ROM support.
32 * i.e we have to support for CD-ROM installs.
33 * See drivers/parisc/superio.c for more gory details.
34 */
35#include <asm/superio.h>
36
37static unsigned long superio_ide_status[2];
38static unsigned long superio_ide_select[2];
39static unsigned long superio_ide_dma_status[2];
40
41#define SUPERIO_IDE_MAX_RETRIES 25
42
43/* Because of a defect in Super I/O, all reads of the PCI DMA status
44 * registers, IDE status register and the IDE select register need to be
45 * retried
46 */
47static u8 superio_ide_inb (unsigned long port)
48{
49 if (port == superio_ide_status[0] ||
50 port == superio_ide_status[1] ||
51 port == superio_ide_select[0] ||
52 port == superio_ide_select[1] ||
53 port == superio_ide_dma_status[0] ||
54 port == superio_ide_dma_status[1]) {
55 u8 tmp;
56 int retries = SUPERIO_IDE_MAX_RETRIES;
57
58 /* printk(" [ reading port 0x%x with retry ] ", port); */
59
60 do {
61 tmp = inb(port);
62 if (tmp == 0)
63 udelay(50);
64 } while (tmp == 0 && retries-- > 0);
65
66 return tmp;
67 }
68
69 return inb(port);
70}
71
72static void __devinit superio_ide_init_iops (struct hwif_s *hwif)
73{
74 u32 base, dmabase;
75 u8 tmp;
76 struct pci_dev *pdev = hwif->pci_dev;
77 u8 port = hwif->channel;
78
79 base = pci_resource_start(pdev, port * 2) & ~3;
80 dmabase = pci_resource_start(pdev, 4) & ~3;
81
82 superio_ide_status[port] = base + IDE_STATUS_OFFSET;
83 superio_ide_select[port] = base + IDE_SELECT_OFFSET;
84 superio_ide_dma_status[port] = dmabase + (!port ? 2 : 0xa);
85
86 /* Clear error/interrupt, enable dma */
87 tmp = superio_ide_inb(superio_ide_dma_status[port]);
88 outb(tmp | 0x66, superio_ide_dma_status[port]);
89
90 /* We need to override inb to workaround a SuperIO errata */
91 hwif->INB = superio_ide_inb;
92}
93
94static void __devinit init_iops_ns87415(ide_hwif_t *hwif)
95{
96 if (PCI_SLOT(hwif->pci_dev->devfn) == 0xE) {
97 /* Built-in - assume it's under superio. */
98 superio_ide_init_iops(hwif);
99 }
100}
101#endif
102
103static unsigned int ns87415_count = 0, ns87415_control[MAX_HWIFS] = { 0 };
104
105/*
106 * This routine either enables/disables (according to drive->present)
107 * the IRQ associated with the port (HWIF(drive)),
108 * and selects either PIO or DMA handshaking for the next I/O operation.
109 */
110static void ns87415_prepare_drive (ide_drive_t *drive, unsigned int use_dma)
111{
112 ide_hwif_t *hwif = HWIF(drive);
113 unsigned int bit, other, new, *old = (unsigned int *) hwif->select_data;
114 struct pci_dev *dev = hwif->pci_dev;
115 unsigned long flags;
116
117 local_irq_save(flags);
118 new = *old;
119
120 /* Adjust IRQ enable bit */
121 bit = 1 << (8 + hwif->channel);
122 new = drive->present ? (new & ~bit) : (new | bit);
123
124 /* Select PIO or DMA, DMA may only be selected for one drive/channel. */
125 bit = 1 << (20 + drive->select.b.unit + (hwif->channel << 1));
126 other = 1 << (20 + (1 - drive->select.b.unit) + (hwif->channel << 1));
127 new = use_dma ? ((new & ~other) | bit) : (new & ~bit);
128
129 if (new != *old) {
130 unsigned char stat;
131
132 /*
133 * Don't change DMA engine settings while Write Buffers
134 * are busy.
135 */
136 (void) pci_read_config_byte(dev, 0x43, &stat);
137 while (stat & 0x03) {
138 udelay(1);
139 (void) pci_read_config_byte(dev, 0x43, &stat);
140 }
141
142 *old = new;
143 (void) pci_write_config_dword(dev, 0x40, new);
144
145 /*
146 * And let things settle...
147 */
148 udelay(10);
149 }
150
151 local_irq_restore(flags);
152}
153
154static void ns87415_selectproc (ide_drive_t *drive)
155{
156 ns87415_prepare_drive (drive, drive->using_dma);
157}
158
159static int ns87415_ide_dma_end (ide_drive_t *drive)
160{
161 ide_hwif_t *hwif = HWIF(drive);
162 u8 dma_stat = 0, dma_cmd = 0;
163
164 drive->waiting_for_dma = 0;
165 dma_stat = hwif->INB(hwif->dma_status);
166 /* get dma command mode */
167 dma_cmd = hwif->INB(hwif->dma_command);
168 /* stop DMA */
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100169 outb(dma_cmd & ~1, hwif->dma_command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 /* from ERRATA: clear the INTR & ERROR bits */
171 dma_cmd = hwif->INB(hwif->dma_command);
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100172 outb(dma_cmd | 6, hwif->dma_command);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 /* and free any DMA resources */
174 ide_destroy_dmatable(drive);
175 /* verify good DMA status */
176 return (dma_stat & 7) != 4;
177}
178
179static int ns87415_ide_dma_setup(ide_drive_t *drive)
180{
181 /* select DMA xfer */
182 ns87415_prepare_drive(drive, 1);
183 if (!ide_dma_setup(drive))
184 return 0;
185 /* DMA failed: select PIO xfer */
186 ns87415_prepare_drive(drive, 0);
187 return 1;
188}
189
Herbert Xuc20530e2005-07-03 16:31:04 +0200190static void __devinit init_hwif_ns87415 (ide_hwif_t *hwif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191{
192 struct pci_dev *dev = hwif->pci_dev;
193 unsigned int ctrl, using_inta;
194 u8 progif;
195#ifdef __sparc_v9__
196 int timeout;
197 u8 stat;
198#endif
199
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 hwif->selectproc = &ns87415_selectproc;
201
202 /*
203 * We cannot probe for IRQ: both ports share common IRQ on INTA.
204 * Also, leave IRQ masked during drive probing, to prevent infinite
205 * interrupts from a potentially floating INTA..
206 *
207 * IRQs get unmasked in selectproc when drive is first used.
208 */
209 (void) pci_read_config_dword(dev, 0x40, &ctrl);
210 (void) pci_read_config_byte(dev, 0x09, &progif);
211 /* is irq in "native" mode? */
212 using_inta = progif & (1 << (hwif->channel << 1));
213 if (!using_inta)
214 using_inta = ctrl & (1 << (4 + hwif->channel));
215 if (hwif->mate) {
216 hwif->select_data = hwif->mate->select_data;
217 } else {
218 hwif->select_data = (unsigned long)
219 &ns87415_control[ns87415_count++];
220 ctrl |= (1 << 8) | (1 << 9); /* mask both IRQs */
221 if (using_inta)
222 ctrl &= ~(1 << 6); /* unmask INTA */
223 *((unsigned int *)hwif->select_data) = ctrl;
224 (void) pci_write_config_dword(dev, 0x40, ctrl);
225
226 /*
227 * Set prefetch size to 512 bytes for both ports,
228 * but don't turn on/off prefetching here.
229 */
230 pci_write_config_byte(dev, 0x55, 0xee);
231
232#ifdef __sparc_v9__
233 /*
234 * XXX: Reset the device, if we don't it will not respond
235 * to SELECT_DRIVE() properly during first probe_hwif().
236 */
237 timeout = 10000;
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100238 outb(12, hwif->io_ports[IDE_CONTROL_OFFSET]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 udelay(10);
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100240 outb(8, hwif->io_ports[IDE_CONTROL_OFFSET]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 do {
242 udelay(50);
243 stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]);
244 if (stat == 0xff)
245 break;
246 } while ((stat & BUSY_STAT) && --timeout);
247#endif
248 }
249
250 if (!using_inta)
251 hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
252 else if (!hwif->irq && hwif->mate && hwif->mate->irq)
253 hwif->irq = hwif->mate->irq; /* share IRQ with mate */
254
255 if (!hwif->dma_base)
256 return;
257
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100258 outb(0x60, hwif->dma_status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 hwif->dma_setup = &ns87415_ide_dma_setup;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 hwif->ide_dma_end = &ns87415_ide_dma_end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261}
262
263static ide_pci_device_t ns87415_chipset __devinitdata = {
264 .name = "NS87415",
265#ifdef CONFIG_SUPERIO
266 .init_iops = init_iops_ns87415,
267#endif
268 .init_hwif = init_hwif_ns87415,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 .autodma = AUTODMA,
270 .bootable = ON_BOARD,
Bartlomiej Zolnierkiewicz0ae2e172007-10-16 22:29:55 +0200271 .host_flags = IDE_HFLAG_TRUST_BIOS_FOR_DMA,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272};
273
274static int __devinit ns87415_init_one(struct pci_dev *dev, const struct pci_device_id *id)
275{
276 return ide_setup_pci_device(dev, &ns87415_chipset);
277}
278
Bartlomiej Zolnierkiewicz9cbcc5e2007-10-16 22:29:56 +0200279static const struct pci_device_id ns87415_pci_tbl[] = {
280 { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_87415), 0 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 { 0, },
282};
283MODULE_DEVICE_TABLE(pci, ns87415_pci_tbl);
284
285static struct pci_driver driver = {
286 .name = "NS87415_IDE",
287 .id_table = ns87415_pci_tbl,
288 .probe = ns87415_init_one,
289};
290
Bartlomiej Zolnierkiewicz82ab1ee2007-01-27 13:46:56 +0100291static int __init ns87415_ide_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292{
293 return ide_pci_register_driver(&driver);
294}
295
296module_init(ns87415_ide_init);
297
298MODULE_AUTHOR("Mark Lord, Eddie Dost, Andre Hedrick");
299MODULE_DESCRIPTION("PCI driver module for NS87415 IDE");
300MODULE_LICENSE("GPL");