2 * 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>
7 * Inspired by an earlier effort from David S. Miller <davem@redhat.com>
10 #include <linux/module.h>
11 #include <linux/types.h>
12 #include <linux/kernel.h>
13 #include <linux/interrupt.h>
14 #include <linux/hdreg.h>
15 #include <linux/pci.h>
16 #include <linux/delay.h>
17 #include <linux/ide.h>
18 #include <linux/init.h>
23 /* SUPERIO 87560 is a PoS chip that NatSem denies exists.
24 * Unfortunately, it's built-in on all Astro-based PA-RISC workstations
25 * which use the integrated NS87514 cell for CD-ROM support.
26 * i.e we have to support for CD-ROM installs.
27 * See drivers/parisc/superio.c for more gory details.
29 #include <asm/superio.h>
31 static unsigned long superio_ide_status[2];
32 static unsigned long superio_ide_select[2];
33 static unsigned long superio_ide_dma_status[2];
35 #define SUPERIO_IDE_MAX_RETRIES 25
37 /* Because of a defect in Super I/O, all reads of the PCI DMA status
38 * registers, IDE status register and the IDE select register need to be
41 static u8 superio_ide_inb (unsigned long port)
43 if (port == superio_ide_status[0] ||
44 port == superio_ide_status[1] ||
45 port == superio_ide_select[0] ||
46 port == superio_ide_select[1] ||
47 port == superio_ide_dma_status[0] ||
48 port == superio_ide_dma_status[1]) {
50 int retries = SUPERIO_IDE_MAX_RETRIES;
52 /* printk(" [ reading port 0x%x with retry ] ", port); */
58 } while (tmp == 0 && retries-- > 0);
66 static void superio_tf_read(ide_drive_t *drive, ide_task_t *task)
68 struct ide_io_ports *io_ports = &drive->hwif->io_ports;
69 struct ide_taskfile *tf = &task->tf;
71 if (task->tf_flags & IDE_TFLAG_IN_DATA) {
72 u16 data = inw(io_ports->data_addr);
74 tf->data = data & 0xff;
75 tf->hob_data = (data >> 8) & 0xff;
78 /* be sure we're looking at the low order bits */
79 outb(drive->ctl & ~0x80, io_ports->ctl_addr);
81 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);
92 if (task->tf_flags & IDE_TFLAG_LBA48) {
93 outb(drive->ctl | 0x80, io_ports->ctl_addr);
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);
108 static void __devinit superio_ide_init_iops (struct hwif_s *hwif)
110 struct pci_dev *pdev = to_pci_dev(hwif->dev);
112 u8 port = hwif->channel, tmp;
114 base = pci_resource_start(pdev, port * 2) & ~3;
115 dmabase = pci_resource_start(pdev, 4) & ~3;
117 superio_ide_status[port] = base + 7;
118 superio_ide_select[port] = base + 6;
119 superio_ide_dma_status[port] = dmabase + (!port ? 2 : 0xa);
121 /* Clear error/interrupt, enable dma */
122 tmp = superio_ide_inb(superio_ide_dma_status[port]);
123 outb(tmp | 0x66, superio_ide_dma_status[port]);
125 hwif->tf_read = superio_tf_read;
127 /* We need to override inb to workaround a SuperIO errata */
128 hwif->INB = superio_ide_inb;
131 static void __devinit init_iops_ns87415(ide_hwif_t *hwif)
133 struct pci_dev *dev = to_pci_dev(hwif->dev);
135 if (PCI_SLOT(dev->devfn) == 0xE)
136 /* Built-in - assume it's under superio. */
137 superio_ide_init_iops(hwif);
141 static unsigned int ns87415_count = 0, ns87415_control[MAX_HWIFS] = { 0 };
144 * This routine either enables/disables (according to drive->present)
145 * the IRQ associated with the port (HWIF(drive)),
146 * and selects either PIO or DMA handshaking for the next I/O operation.
148 static void ns87415_prepare_drive (ide_drive_t *drive, unsigned int use_dma)
150 ide_hwif_t *hwif = HWIF(drive);
151 struct pci_dev *dev = to_pci_dev(hwif->dev);
152 unsigned int bit, other, new, *old = (unsigned int *) hwif->select_data;
155 local_irq_save(flags);
158 /* Adjust IRQ enable bit */
159 bit = 1 << (8 + hwif->channel);
160 new = drive->present ? (new & ~bit) : (new | bit);
162 /* Select PIO or DMA, DMA may only be selected for one drive/channel. */
163 bit = 1 << (20 + drive->select.b.unit + (hwif->channel << 1));
164 other = 1 << (20 + (1 - drive->select.b.unit) + (hwif->channel << 1));
165 new = use_dma ? ((new & ~other) | bit) : (new & ~bit);
171 * Don't change DMA engine settings while Write Buffers
174 (void) pci_read_config_byte(dev, 0x43, &stat);
175 while (stat & 0x03) {
177 (void) pci_read_config_byte(dev, 0x43, &stat);
181 (void) pci_write_config_dword(dev, 0x40, new);
184 * And let things settle...
189 local_irq_restore(flags);
192 static void ns87415_selectproc (ide_drive_t *drive)
194 ns87415_prepare_drive (drive, drive->using_dma);
197 static int ns87415_dma_end(ide_drive_t *drive)
199 ide_hwif_t *hwif = HWIF(drive);
200 u8 dma_stat = 0, dma_cmd = 0;
202 drive->waiting_for_dma = 0;
203 dma_stat = hwif->INB(hwif->dma_status);
204 /* get dma command mode */
205 dma_cmd = hwif->INB(hwif->dma_command);
207 outb(dma_cmd & ~1, hwif->dma_command);
208 /* from ERRATA: clear the INTR & ERROR bits */
209 dma_cmd = hwif->INB(hwif->dma_command);
210 outb(dma_cmd | 6, hwif->dma_command);
211 /* and free any DMA resources */
212 ide_destroy_dmatable(drive);
213 /* verify good DMA status */
214 return (dma_stat & 7) != 4;
217 static int ns87415_dma_setup(ide_drive_t *drive)
219 /* select DMA xfer */
220 ns87415_prepare_drive(drive, 1);
221 if (!ide_dma_setup(drive))
223 /* DMA failed: select PIO xfer */
224 ns87415_prepare_drive(drive, 0);
228 #ifndef ide_default_irq
229 #define ide_default_irq(irq) 0
232 static void __devinit init_hwif_ns87415 (ide_hwif_t *hwif)
234 struct pci_dev *dev = to_pci_dev(hwif->dev);
235 unsigned int ctrl, using_inta;
243 * We cannot probe for IRQ: both ports share common IRQ on INTA.
244 * Also, leave IRQ masked during drive probing, to prevent infinite
245 * interrupts from a potentially floating INTA..
247 * IRQs get unmasked in selectproc when drive is first used.
249 (void) pci_read_config_dword(dev, 0x40, &ctrl);
250 (void) pci_read_config_byte(dev, 0x09, &progif);
251 /* is irq in "native" mode? */
252 using_inta = progif & (1 << (hwif->channel << 1));
254 using_inta = ctrl & (1 << (4 + hwif->channel));
256 hwif->select_data = hwif->mate->select_data;
258 hwif->select_data = (unsigned long)
259 &ns87415_control[ns87415_count++];
260 ctrl |= (1 << 8) | (1 << 9); /* mask both IRQs */
262 ctrl &= ~(1 << 6); /* unmask INTA */
263 *((unsigned int *)hwif->select_data) = ctrl;
264 (void) pci_write_config_dword(dev, 0x40, ctrl);
267 * Set prefetch size to 512 bytes for both ports,
268 * but don't turn on/off prefetching here.
270 pci_write_config_byte(dev, 0x55, 0xee);
274 * XXX: Reset the device, if we don't it will not respond to
275 * SELECT_DRIVE() properly during first ide_probe_port().
278 outb(12, hwif->io_ports.ctl_addr);
280 outb(8, hwif->io_ports.ctl_addr);
283 stat = hwif->INB(hwif->io_ports.status_addr);
286 } while ((stat & BUSY_STAT) && --timeout);
291 hwif->irq = ide_default_irq(hwif->io_ports.data_addr);
292 else if (!hwif->irq && hwif->mate && hwif->mate->irq)
293 hwif->irq = hwif->mate->irq; /* share IRQ with mate */
298 outb(0x60, hwif->dma_status);
301 static const struct ide_port_ops ns87415_port_ops = {
302 .selectproc = ns87415_selectproc,
305 static const struct ide_dma_ops ns87415_dma_ops = {
306 .dma_host_set = ide_dma_host_set,
307 .dma_setup = ns87415_dma_setup,
308 .dma_exec_cmd = ide_dma_exec_cmd,
309 .dma_start = ide_dma_start,
310 .dma_end = ns87415_dma_end,
311 .dma_test_irq = ide_dma_test_irq,
312 .dma_lost_irq = ide_dma_lost_irq,
313 .dma_timeout = ide_dma_timeout,
316 static const struct ide_port_info ns87415_chipset __devinitdata = {
318 #ifdef CONFIG_SUPERIO
319 .init_iops = init_iops_ns87415,
321 .init_hwif = init_hwif_ns87415,
322 .port_ops = &ns87415_port_ops,
323 .dma_ops = &ns87415_dma_ops,
324 .host_flags = IDE_HFLAG_TRUST_BIOS_FOR_DMA |
325 IDE_HFLAG_NO_ATAPI_DMA,
328 static int __devinit ns87415_init_one(struct pci_dev *dev, const struct pci_device_id *id)
330 return ide_setup_pci_device(dev, &ns87415_chipset);
333 static const struct pci_device_id ns87415_pci_tbl[] = {
334 { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_87415), 0 },
337 MODULE_DEVICE_TABLE(pci, ns87415_pci_tbl);
339 static struct pci_driver driver = {
340 .name = "NS87415_IDE",
341 .id_table = ns87415_pci_tbl,
342 .probe = ns87415_init_one,
345 static int __init ns87415_ide_init(void)
347 return ide_pci_register_driver(&driver);
350 module_init(ns87415_ide_init);
352 MODULE_AUTHOR("Mark Lord, Eddie Dost, Andre Hedrick");
353 MODULE_DESCRIPTION("PCI driver module for NS87415 IDE");
354 MODULE_LICENSE("GPL");