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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
Sergei Shtylyov3153c262009-04-08 14:13:03 +020064static void superio_tf_read(ide_drive_t *drive, struct ide_taskfile *tf,
65 u8 valid)
Bartlomiej Zolnierkiewiczea23b8b2008-04-28 23:44:40 +020066{
67 struct ide_io_ports *io_ports = &drive->hwif->io_ports;
Bartlomiej Zolnierkiewiczea23b8b2008-04-28 23:44:40 +020068
Sergei Shtylyov60f85012009-04-08 14:13:01 +020069 if (valid & IDE_VALID_ERROR)
Sergei Shtylyov67625112009-03-31 20:15:30 +020070 tf->error = inb(io_ports->feature_addr);
Sergei Shtylyov60f85012009-04-08 14:13:01 +020071 if (valid & IDE_VALID_NSECT)
Bartlomiej Zolnierkiewiczea23b8b2008-04-28 23:44:40 +020072 tf->nsect = inb(io_ports->nsect_addr);
Sergei Shtylyov60f85012009-04-08 14:13:01 +020073 if (valid & IDE_VALID_LBAL)
Bartlomiej Zolnierkiewiczea23b8b2008-04-28 23:44:40 +020074 tf->lbal = inb(io_ports->lbal_addr);
Sergei Shtylyov60f85012009-04-08 14:13:01 +020075 if (valid & IDE_VALID_LBAM)
Bartlomiej Zolnierkiewiczea23b8b2008-04-28 23:44:40 +020076 tf->lbam = inb(io_ports->lbam_addr);
Sergei Shtylyov60f85012009-04-08 14:13:01 +020077 if (valid & IDE_VALID_LBAH)
Bartlomiej Zolnierkiewiczea23b8b2008-04-28 23:44:40 +020078 tf->lbah = inb(io_ports->lbah_addr);
Sergei Shtylyov60f85012009-04-08 14:13:01 +020079 if (valid & IDE_VALID_DEVICE)
Bartlomiej Zolnierkiewiczea23b8b2008-04-28 23:44:40 +020080 tf->device = superio_ide_inb(io_ports->device_addr);
Bartlomiej Zolnierkiewiczea23b8b2008-04-28 23:44:40 +020081}
82
Sergei Shtylyovabb596b2009-03-31 20:15:32 +020083static void ns87415_dev_select(ide_drive_t *drive);
84
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +020085static const struct ide_tp_ops superio_tp_ops = {
86 .exec_command = ide_exec_command,
87 .read_status = superio_read_status,
88 .read_altstatus = ide_read_altstatus,
Sergei Shtylyovecf3a312009-03-31 20:15:30 +020089 .write_devctl = ide_write_devctl,
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +020090
Sergei Shtylyovabb596b2009-03-31 20:15:32 +020091 .dev_select = ns87415_dev_select,
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +020092 .tf_load = ide_tf_load,
93 .tf_read = superio_tf_read,
94
95 .input_data = ide_input_data,
96 .output_data = ide_output_data,
97};
98
99static void __devinit superio_init_iops(struct hwif_s *hwif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100{
Bartlomiej Zolnierkiewicz36501652008-02-01 23:09:31 +0100101 struct pci_dev *pdev = to_pci_dev(hwif->dev);
Bartlomiej Zolnierkiewicz761052e2008-07-23 19:55:54 +0200102 u32 dma_stat;
Bartlomiej Zolnierkiewicz36501652008-02-01 23:09:31 +0100103 u8 port = hwif->channel, tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104
Bartlomiej Zolnierkiewicz761052e2008-07-23 19:55:54 +0200105 dma_stat = (pci_resource_start(pdev, 4) & ~3) + (!port ? 2 : 0xa);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106
107 /* Clear error/interrupt, enable dma */
Bartlomiej Zolnierkiewicz761052e2008-07-23 19:55:54 +0200108 tmp = superio_ide_inb(dma_stat);
109 outb(tmp | 0x66, dma_stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110}
Sergei Shtylyov592b5312009-01-06 17:21:02 +0100111#else
112#define superio_dma_sff_read_status ide_dma_sff_read_status
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113#endif
114
115static unsigned int ns87415_count = 0, ns87415_control[MAX_HWIFS] = { 0 };
116
117/*
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200118 * This routine either enables/disables (according to IDE_DFLAG_PRESENT)
Bartlomiej Zolnierkiewicz898ec222009-01-06 17:20:52 +0100119 * the IRQ associated with the port,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 * and selects either PIO or DMA handshaking for the next I/O operation.
121 */
122static void ns87415_prepare_drive (ide_drive_t *drive, unsigned int use_dma)
123{
Bartlomiej Zolnierkiewicz898ec222009-01-06 17:20:52 +0100124 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz36501652008-02-01 23:09:31 +0100125 struct pci_dev *dev = to_pci_dev(hwif->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 unsigned int bit, other, new, *old = (unsigned int *) hwif->select_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 unsigned long flags;
128
129 local_irq_save(flags);
130 new = *old;
131
132 /* Adjust IRQ enable bit */
133 bit = 1 << (8 + hwif->channel);
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200134
135 if (drive->dev_flags & IDE_DFLAG_PRESENT)
136 new &= ~bit;
137 else
138 new |= bit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139
140 /* Select PIO or DMA, DMA may only be selected for one drive/channel. */
Bartlomiej Zolnierkiewicz123995b2008-10-13 21:39:40 +0200141 bit = 1 << (20 + (drive->dn & 1) + (hwif->channel << 1));
142 other = 1 << (20 + (1 - (drive->dn & 1)) + (hwif->channel << 1));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 new = use_dma ? ((new & ~other) | bit) : (new & ~bit);
144
145 if (new != *old) {
146 unsigned char stat;
147
148 /*
149 * Don't change DMA engine settings while Write Buffers
150 * are busy.
151 */
152 (void) pci_read_config_byte(dev, 0x43, &stat);
153 while (stat & 0x03) {
154 udelay(1);
155 (void) pci_read_config_byte(dev, 0x43, &stat);
156 }
157
158 *old = new;
159 (void) pci_write_config_dword(dev, 0x40, new);
160
161 /*
162 * And let things settle...
163 */
164 udelay(10);
165 }
166
167 local_irq_restore(flags);
168}
169
Sergei Shtylyovabb596b2009-03-31 20:15:32 +0200170static void ns87415_dev_select(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171{
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200172 ns87415_prepare_drive(drive,
173 !!(drive->dev_flags & IDE_DFLAG_USING_DMA));
Sergei Shtylyovabb596b2009-03-31 20:15:32 +0200174
175 outb(drive->select | ATA_DEVICE_OBS, drive->hwif->io_ports.device_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176}
177
Bartlomiej Zolnierkiewicza6d67ff2009-03-31 20:15:20 +0200178static void ns87415_dma_start(ide_drive_t *drive)
179{
180 ns87415_prepare_drive(drive, 1);
181 ide_dma_start(drive);
182}
183
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200184static int ns87415_dma_end(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185{
Bartlomiej Zolnierkiewicz898ec222009-01-06 17:20:52 +0100186 ide_hwif_t *hwif = drive->hwif;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 u8 dma_stat = 0, dma_cmd = 0;
188
Sergei Shtylyov592b5312009-01-06 17:21:02 +0100189 dma_stat = hwif->dma_ops->dma_sff_read_status(hwif);
Bartlomiej Zolnierkiewiczcab7f8e2008-07-23 19:55:51 +0200190 /* get DMA command mode */
191 dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 /* stop DMA */
Bartlomiej Zolnierkiewiczcab7f8e2008-07-23 19:55:51 +0200193 outb(dma_cmd & ~1, hwif->dma_base + ATA_DMA_CMD);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 /* from ERRATA: clear the INTR & ERROR bits */
Bartlomiej Zolnierkiewiczcab7f8e2008-07-23 19:55:51 +0200195 dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD);
196 outb(dma_cmd | 6, hwif->dma_base + ATA_DMA_CMD);
Bartlomiej Zolnierkiewicza6d67ff2009-03-31 20:15:20 +0200197
198 ns87415_prepare_drive(drive, 0);
199
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 /* verify good DMA status */
201 return (dma_stat & 7) != 4;
202}
203
Herbert Xuc20530e2005-07-03 16:31:04 +0200204static void __devinit init_hwif_ns87415 (ide_hwif_t *hwif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205{
Bartlomiej Zolnierkiewicz36501652008-02-01 23:09:31 +0100206 struct pci_dev *dev = to_pci_dev(hwif->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 unsigned int ctrl, using_inta;
208 u8 progif;
209#ifdef __sparc_v9__
210 int timeout;
211 u8 stat;
212#endif
213
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 /*
215 * We cannot probe for IRQ: both ports share common IRQ on INTA.
216 * Also, leave IRQ masked during drive probing, to prevent infinite
217 * interrupts from a potentially floating INTA..
218 *
Sergei Shtylyovabb596b2009-03-31 20:15:32 +0200219 * IRQs get unmasked in dev_select() when drive is first used.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 */
221 (void) pci_read_config_dword(dev, 0x40, &ctrl);
222 (void) pci_read_config_byte(dev, 0x09, &progif);
223 /* is irq in "native" mode? */
224 using_inta = progif & (1 << (hwif->channel << 1));
225 if (!using_inta)
226 using_inta = ctrl & (1 << (4 + hwif->channel));
227 if (hwif->mate) {
228 hwif->select_data = hwif->mate->select_data;
229 } else {
230 hwif->select_data = (unsigned long)
231 &ns87415_control[ns87415_count++];
232 ctrl |= (1 << 8) | (1 << 9); /* mask both IRQs */
233 if (using_inta)
234 ctrl &= ~(1 << 6); /* unmask INTA */
235 *((unsigned int *)hwif->select_data) = ctrl;
236 (void) pci_write_config_dword(dev, 0x40, ctrl);
237
238 /*
239 * Set prefetch size to 512 bytes for both ports,
240 * but don't turn on/off prefetching here.
241 */
242 pci_write_config_byte(dev, 0x55, 0xee);
243
244#ifdef __sparc_v9__
245 /*
Bartlomiej Zolnierkiewicz9d501522008-02-01 23:09:36 +0100246 * XXX: Reset the device, if we don't it will not respond to
Sergei Shtylyovfdd88f02009-03-31 20:15:33 +0200247 * dev_select() properly during first ide_probe_port().
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 */
249 timeout = 10000;
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200250 outb(12, hwif->io_ports.ctl_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 udelay(10);
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200252 outb(8, hwif->io_ports.ctl_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 do {
254 udelay(50);
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200255 stat = hwif->tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200256 if (stat == 0xff)
257 break;
258 } while ((stat & ATA_BUSY) && --timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259#endif
260 }
261
262 if (!using_inta)
Bartlomiej Zolnierkiewicz973d9e72009-03-24 23:22:48 +0100263 hwif->irq = pci_get_legacy_ide_irq(dev, hwif->channel);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264
265 if (!hwif->dma_base)
266 return;
267
Bartlomiej Zolnierkiewiczcab7f8e2008-07-23 19:55:51 +0200268 outb(0x60, hwif->dma_base + ATA_DMA_STATUS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269}
270
Sergei Shtylyovabb596b2009-03-31 20:15:32 +0200271static const struct ide_tp_ops ns87415_tp_ops = {
272 .exec_command = ide_exec_command,
273 .read_status = ide_read_status,
274 .read_altstatus = ide_read_altstatus,
275 .write_devctl = ide_write_devctl,
276
277 .dev_select = ns87415_dev_select,
278 .tf_load = ide_tf_load,
279 .tf_read = ide_tf_read,
280
281 .input_data = ide_input_data,
282 .output_data = ide_output_data,
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200283};
284
Bartlomiej Zolnierkiewiczf37afda2008-04-26 22:25:24 +0200285static const struct ide_dma_ops ns87415_dma_ops = {
286 .dma_host_set = ide_dma_host_set,
Bartlomiej Zolnierkiewicza6d67ff2009-03-31 20:15:20 +0200287 .dma_setup = ide_dma_setup,
288 .dma_start = ns87415_dma_start,
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200289 .dma_end = ns87415_dma_end,
Bartlomiej Zolnierkiewiczf37afda2008-04-26 22:25:24 +0200290 .dma_test_irq = ide_dma_test_irq,
291 .dma_lost_irq = ide_dma_lost_irq,
Bartlomiej Zolnierkiewicz22117d62009-03-27 12:46:47 +0100292 .dma_timer_expiry = ide_dma_sff_timer_expiry,
Sergei Shtylyov592b5312009-01-06 17:21:02 +0100293 .dma_sff_read_status = superio_dma_sff_read_status,
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200294};
295
Andi Kleene6b53702012-10-04 17:11:48 -0700296static const struct ide_port_info ns87415_chipset __devinitconst = {
Bartlomiej Zolnierkiewiczced3ec82008-07-24 22:53:32 +0200297 .name = DRV_NAME,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 .init_hwif = init_hwif_ns87415,
Sergei Shtylyovabb596b2009-03-31 20:15:32 +0200299 .tp_ops = &ns87415_tp_ops,
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200300 .dma_ops = &ns87415_dma_ops,
Bartlomiej Zolnierkiewicz33c10022007-10-19 00:30:06 +0200301 .host_flags = IDE_HFLAG_TRUST_BIOS_FOR_DMA |
Bartlomiej Zolnierkiewicz5e71d9c2008-04-26 17:36:35 +0200302 IDE_HFLAG_NO_ATAPI_DMA,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303};
304
305static int __devinit ns87415_init_one(struct pci_dev *dev, const struct pci_device_id *id)
306{
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200307 struct ide_port_info d = ns87415_chipset;
308
309#ifdef CONFIG_SUPERIO
310 if (PCI_SLOT(dev->devfn) == 0xE) {
311 /* Built-in - assume it's under superio. */
312 d.init_iops = superio_init_iops;
313 d.tp_ops = &superio_tp_ops;
314 }
315#endif
Bartlomiej Zolnierkiewicz6cdf6eb2008-07-24 22:53:14 +0200316 return ide_pci_init_one(dev, &d, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317}
318
Bartlomiej Zolnierkiewicz9cbcc5e2007-10-16 22:29:56 +0200319static const struct pci_device_id ns87415_pci_tbl[] = {
320 { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_87415), 0 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 { 0, },
322};
323MODULE_DEVICE_TABLE(pci, ns87415_pci_tbl);
324
Bartlomiej Zolnierkiewicza9ab09e2008-10-13 21:39:41 +0200325static struct pci_driver ns87415_pci_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 .name = "NS87415_IDE",
327 .id_table = ns87415_pci_tbl,
328 .probe = ns87415_init_one,
Bartlomiej Zolnierkiewiczaa6e5182008-07-24 22:53:23 +0200329 .remove = ide_pci_remove,
Bartlomiej Zolnierkiewiczfeb22b72008-10-10 22:39:32 +0200330 .suspend = ide_pci_suspend,
331 .resume = ide_pci_resume,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332};
333
Bartlomiej Zolnierkiewicz82ab1ee2007-01-27 13:46:56 +0100334static int __init ns87415_ide_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335{
Bartlomiej Zolnierkiewicza9ab09e2008-10-13 21:39:41 +0200336 return ide_pci_register_driver(&ns87415_pci_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337}
338
Bartlomiej Zolnierkiewiczaa6e5182008-07-24 22:53:23 +0200339static void __exit ns87415_ide_exit(void)
340{
Bartlomiej Zolnierkiewicza9ab09e2008-10-13 21:39:41 +0200341 pci_unregister_driver(&ns87415_pci_driver);
Bartlomiej Zolnierkiewiczaa6e5182008-07-24 22:53:23 +0200342}
343
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344module_init(ns87415_ide_init);
Bartlomiej Zolnierkiewiczaa6e5182008-07-24 22:53:23 +0200345module_exit(ns87415_ide_exit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346
347MODULE_AUTHOR("Mark Lord, Eddie Dost, Andre Hedrick");
348MODULE_DESCRIPTION("PCI driver module for NS87415 IDE");
349MODULE_LICENSE("GPL");