blob: 5171601fb2556646544587466a14b8e973389a15 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Bartlomiej Zolnierkiewicz59bca8c2008-02-01 23:09:33 +01002 * Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
3 * Copyright (C) 1995-1998 Mark Lord
4 * Copyright (C) 2007 Bartlomiej Zolnierkiewicz
Bartlomiej Zolnierkiewicz58f189f2008-02-01 23:09:33 +01005 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 * May be copied or modified under the terms of the GNU General Public License
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 */
8
Linus Torvalds1da177e2005-04-16 15:20:36 -07009#include <linux/module.h>
10#include <linux/types.h>
11#include <linux/kernel.h>
12#include <linux/pci.h>
13#include <linux/init.h>
14#include <linux/timer.h>
15#include <linux/mm.h>
16#include <linux/interrupt.h>
17#include <linux/ide.h>
18#include <linux/dma-mapping.h>
19
20#include <asm/io.h>
21#include <asm/irq.h>
22
Linus Torvalds1da177e2005-04-16 15:20:36 -070023/**
24 * ide_setup_pci_baseregs - place a PCI IDE controller native
25 * @dev: PCI device of interface to switch native
26 * @name: Name of interface
27 *
28 * We attempt to place the PCI interface into PCI native mode. If
29 * we succeed the BARs are ok and the controller is in PCI mode.
Paolo Ciarrocchi846bb882008-04-26 17:36:39 +020030 * Returns 0 on success or an errno code.
Linus Torvalds1da177e2005-04-16 15:20:36 -070031 *
32 * FIXME: if we program the interface and then fail to set the BARS
33 * we don't switch it back to legacy mode. Do we actually care ??
34 */
Paolo Ciarrocchi846bb882008-04-26 17:36:39 +020035
36static int ide_setup_pci_baseregs(struct pci_dev *dev, const char *name)
Linus Torvalds1da177e2005-04-16 15:20:36 -070037{
38 u8 progif = 0;
39
40 /*
41 * Place both IDE interfaces into PCI "native" mode:
42 */
43 if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
44 (progif & 5) != 5) {
45 if ((progif & 0xa) != 0xa) {
46 printk(KERN_INFO "%s: device not capable of full "
47 "native PCI mode\n", name);
48 return -EOPNOTSUPP;
49 }
50 printk("%s: placing both ports into native PCI mode\n", name);
51 (void) pci_write_config_byte(dev, PCI_CLASS_PROG, progif|5);
52 if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
53 (progif & 5) != 5) {
54 printk(KERN_ERR "%s: rewrite of PROGIF failed, wanted "
55 "0x%04x, got 0x%04x\n",
56 name, progif|5, progif);
57 return -EOPNOTSUPP;
58 }
59 }
60 return 0;
61}
62
63#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
Bartlomiej Zolnierkiewicz8ac2b422008-02-01 23:09:30 +010064static void ide_pci_clear_simplex(unsigned long dma_base, const char *name)
65{
66 u8 dma_stat = inb(dma_base + 2);
67
68 outb(dma_stat & 0x60, dma_base + 2);
69 dma_stat = inb(dma_base + 2);
70 if (dma_stat & 0x80)
71 printk(KERN_INFO "%s: simplex device: DMA forced\n", name);
72}
73
Linus Torvalds1da177e2005-04-16 15:20:36 -070074/**
Bartlomiej Zolnierkiewiczb123f562008-04-26 22:25:22 +020075 * ide_pci_dma_base - setup BMIBA
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +020076 * @hwif: IDE interface
Bartlomiej Zolnierkiewiczb123f562008-04-26 22:25:22 +020077 * @d: IDE port info
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 *
Bartlomiej Zolnierkiewiczc58e79d2007-10-16 22:29:56 +020079 * Fetch the DMA Bus-Master-I/O-Base-Address (BMIBA) from PCI space.
80 * Where a device has a partner that is already in DMA mode we check
81 * and enforce IDE simplex rules.
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 */
83
Bartlomiej Zolnierkiewiczb123f562008-04-26 22:25:22 +020084unsigned long ide_pci_dma_base(ide_hwif_t *hwif, const struct ide_port_info *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -070085{
Bartlomiej Zolnierkiewicz36501652008-02-01 23:09:31 +010086 struct pci_dev *dev = to_pci_dev(hwif->dev);
87 unsigned long dma_base = 0;
Bartlomiej Zolnierkiewicz8ac2b422008-02-01 23:09:30 +010088 u8 dma_stat = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070089
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 if (hwif->mmio)
91 return hwif->dma_base;
92
93 if (hwif->mate && hwif->mate->dma_base) {
94 dma_base = hwif->mate->dma_base - (hwif->channel ? 0 : 8);
95 } else {
Bartlomiej Zolnierkiewicz9ffcf362007-10-19 00:30:07 +020096 u8 baridx = (d->host_flags & IDE_HFLAG_CS5520) ? 2 : 4;
97
98 dma_base = pci_resource_start(dev, baridx);
99
Bartlomiej Zolnierkiewiczaea5d372008-01-26 20:12:59 +0100100 if (dma_base == 0) {
Bartlomiej Zolnierkiewicz9ffcf362007-10-19 00:30:07 +0200101 printk(KERN_ERR "%s: DMA base is invalid\n", d->name);
Bartlomiej Zolnierkiewiczaea5d372008-01-26 20:12:59 +0100102 return 0;
103 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 }
105
Bartlomiej Zolnierkiewiczaea5d372008-01-26 20:12:59 +0100106 if (hwif->channel)
107 dma_base += 8;
108
Bartlomiej Zolnierkiewicz8ac2b422008-02-01 23:09:30 +0100109 if (d->host_flags & IDE_HFLAG_CS5520)
110 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111
Bartlomiej Zolnierkiewicz8ac2b422008-02-01 23:09:30 +0100112 if (d->host_flags & IDE_HFLAG_CLEAR_SIMPLEX) {
113 ide_pci_clear_simplex(dma_base, d->name);
114 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 }
Bartlomiej Zolnierkiewicz8ac2b422008-02-01 23:09:30 +0100116
117 /*
118 * If the device claims "simplex" DMA, this means that only one of
119 * the two interfaces can be trusted with DMA at any point in time
120 * (so we should enable DMA only on one of the two interfaces).
121 *
122 * FIXME: At this point we haven't probed the drives so we can't make
123 * the appropriate decision. Really we should defer this problem until
124 * we tune the drive then try to grab DMA ownership if we want to be
125 * the DMA end. This has to be become dynamic to handle hot-plug.
126 */
127 dma_stat = hwif->INB(dma_base + 2);
128 if ((dma_stat & 0x80) && hwif->mate && hwif->mate->dma_base) {
129 printk(KERN_INFO "%s: simplex device: DMA disabled\n", d->name);
130 dma_base = 0;
131 }
132out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 return dma_base;
134}
Bartlomiej Zolnierkiewiczb123f562008-04-26 22:25:22 +0200135EXPORT_SYMBOL_GPL(ide_pci_dma_base);
Bartlomiej Zolnierkiewiczd54452f2008-04-26 22:25:21 +0200136
137/*
138 * Set up BM-DMA capability (PnP BIOS should have done this)
139 */
Bartlomiej Zolnierkiewiczb123f562008-04-26 22:25:22 +0200140int ide_pci_set_master(struct pci_dev *dev, const char *name)
Bartlomiej Zolnierkiewiczd54452f2008-04-26 22:25:21 +0200141{
142 u16 pcicmd;
143
144 pci_read_config_word(dev, PCI_COMMAND, &pcicmd);
145
146 if ((pcicmd & PCI_COMMAND_MASTER) == 0) {
147 pci_set_master(dev);
148
149 if (pci_read_config_word(dev, PCI_COMMAND, &pcicmd) ||
150 (pcicmd & PCI_COMMAND_MASTER) == 0) {
151 printk(KERN_ERR "%s: error updating PCICMD on %s\n",
152 name, pci_name(dev));
153 return -EIO;
154 }
155 }
156
157 return 0;
158}
Bartlomiej Zolnierkiewiczb123f562008-04-26 22:25:22 +0200159EXPORT_SYMBOL_GPL(ide_pci_set_master);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
161
Bartlomiej Zolnierkiewicz85620432007-10-20 00:32:34 +0200162void ide_setup_pci_noise(struct pci_dev *dev, const struct ide_port_info *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163{
Bartlomiej Zolnierkiewiczbde07e52007-10-20 00:32:36 +0200164 printk(KERN_INFO "%s: IDE controller (0x%04x:0x%04x rev 0x%02x) at "
165 " PCI slot %s\n", d->name, dev->vendor, dev->device,
166 dev->revision, pci_name(dev));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168EXPORT_SYMBOL_GPL(ide_setup_pci_noise);
169
170
171/**
172 * ide_pci_enable - do PCI enables
173 * @dev: PCI device
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200174 * @d: IDE port info
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 *
176 * Enable the IDE PCI device. We attempt to enable the device in full
Benjamin Herrenschmidt09483912007-12-20 15:28:09 +1100177 * but if that fails then we only need IO space. The PCI code should
178 * have setup the proper resources for us already for controllers in
179 * legacy mode.
Paolo Ciarrocchi846bb882008-04-26 17:36:39 +0200180 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 * Returns zero on success or an error code
182 */
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200183
Bartlomiej Zolnierkiewicz85620432007-10-20 00:32:34 +0200184static int ide_pci_enable(struct pci_dev *dev, const struct ide_port_info *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185{
Bartlomiej Zolnierkiewicz0d1bad22008-04-26 22:25:19 +0200186 int ret, bars;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187
188 if (pci_enable_device(dev)) {
Benjamin Herrenschmidt09483912007-12-20 15:28:09 +1100189 ret = pci_enable_device_io(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 if (ret < 0) {
191 printk(KERN_WARNING "%s: (ide_setup_pci_device:) "
192 "Could not enable device.\n", d->name);
193 goto out;
194 }
195 printk(KERN_WARNING "%s: BIOS configuration fixed.\n", d->name);
196 }
197
198 /*
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200199 * assume all devices can do 32-bit DMA for now, we can add
200 * a DMA mask field to the struct ide_port_info if we need it
201 * (or let lower level driver set the DMA mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 */
203 ret = pci_set_dma_mask(dev, DMA_32BIT_MASK);
204 if (ret < 0) {
205 printk(KERN_ERR "%s: can't set dma mask\n", d->name);
206 goto out;
207 }
208
Bartlomiej Zolnierkiewicz0d1bad22008-04-26 22:25:19 +0200209 if (d->host_flags & IDE_HFLAG_SINGLE)
210 bars = (1 << 2) - 1;
211 else
212 bars = (1 << 4) - 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213
Bartlomiej Zolnierkiewicz0d1bad22008-04-26 22:25:19 +0200214 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) {
215 if (d->host_flags & IDE_HFLAG_CS5520)
216 bars |= (1 << 2);
217 else
218 bars |= (1 << 4);
219 }
220
221 ret = pci_request_selected_regions(dev, bars, d->name);
222 if (ret < 0)
223 printk(KERN_ERR "%s: can't reserve resources\n", d->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224out:
225 return ret;
226}
227
228/**
229 * ide_pci_configure - configure an unconfigured device
230 * @dev: PCI device
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200231 * @d: IDE port info
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 *
233 * Enable and configure the PCI device we have been passed.
234 * Returns zero on success or an error code.
235 */
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200236
Bartlomiej Zolnierkiewicz85620432007-10-20 00:32:34 +0200237static int ide_pci_configure(struct pci_dev *dev, const struct ide_port_info *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238{
239 u16 pcicmd = 0;
240 /*
241 * PnP BIOS was *supposed* to have setup this device, but we
242 * can do it ourselves, so long as the BIOS has assigned an IRQ
243 * (or possibly the device is using a "legacy header" for IRQs).
244 * Maybe the user deliberately *disabled* the device,
245 * but we'll eventually ignore it again if no drives respond.
246 */
Paolo Ciarrocchi846bb882008-04-26 17:36:39 +0200247 if (ide_setup_pci_baseregs(dev, d->name) ||
248 pci_write_config_word(dev, PCI_COMMAND, pcicmd | PCI_COMMAND_IO)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 printk(KERN_INFO "%s: device disabled (BIOS)\n", d->name);
250 return -ENODEV;
251 }
252 if (pci_read_config_word(dev, PCI_COMMAND, &pcicmd)) {
253 printk(KERN_ERR "%s: error accessing PCI regs\n", d->name);
254 return -EIO;
255 }
256 if (!(pcicmd & PCI_COMMAND_IO)) {
257 printk(KERN_ERR "%s: unable to enable IDE controller\n", d->name);
258 return -ENXIO;
259 }
260 return 0;
261}
262
263/**
264 * ide_pci_check_iomem - check a register is I/O
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200265 * @dev: PCI device
266 * @d: IDE port info
267 * @bar: BAR number
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 *
Sergei Shtylyov1baccff2008-04-26 17:36:31 +0200269 * Checks if a BAR is configured and points to MMIO space. If so,
270 * return an error code. Otherwise return 0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 */
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200272
Sergei Shtylyov1baccff2008-04-26 17:36:31 +0200273static int ide_pci_check_iomem(struct pci_dev *dev, const struct ide_port_info *d,
274 int bar)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275{
276 ulong flags = pci_resource_flags(dev, bar);
Paolo Ciarrocchi846bb882008-04-26 17:36:39 +0200277
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 /* Unconfigured ? */
279 if (!flags || pci_resource_len(dev, bar) == 0)
280 return 0;
281
Sergei Shtylyov1baccff2008-04-26 17:36:31 +0200282 /* I/O space */
283 if (flags & IORESOURCE_IO)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 return 0;
Paolo Ciarrocchi846bb882008-04-26 17:36:39 +0200285
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 /* Bad */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 return -EINVAL;
288}
289
290/**
291 * ide_hwif_configure - configure an IDE interface
292 * @dev: PCI device holding interface
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200293 * @d: IDE port info
Bartlomiej Zolnierkiewicz1ebf7492008-02-02 19:56:30 +0100294 * @port: port number
295 * @irq: PCI IRQ
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 *
297 * Perform the initial set up for the hardware interface structure. This
298 * is done per interface port rather than per PCI device. There may be
299 * more than one port per device.
300 *
301 * Returns the new hardware interface structure, or NULL on a failure
302 */
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200303
Bartlomiej Zolnierkiewicz1ebf7492008-02-02 19:56:30 +0100304static ide_hwif_t *ide_hwif_configure(struct pci_dev *dev,
305 const struct ide_port_info *d,
306 unsigned int port, int irq)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307{
308 unsigned long ctl = 0, base = 0;
309 ide_hwif_t *hwif;
Bartlomiej Zolnierkiewicz79127c32008-01-26 20:13:08 +0100310 struct hw_regs_s hw;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311
Bartlomiej Zolnierkiewicza5d8c5c2007-07-20 01:11:55 +0200312 if ((d->host_flags & IDE_HFLAG_ISA_PORTS) == 0) {
Sergei Shtylyov1baccff2008-04-26 17:36:31 +0200313 if (ide_pci_check_iomem(dev, d, 2 * port) ||
314 ide_pci_check_iomem(dev, d, 2 * port + 1)) {
315 printk(KERN_ERR "%s: I/O baseregs (BIOS) are reported "
316 "as MEM for port %d!\n", d->name, port);
317 return NULL;
318 }
Paolo Ciarrocchi846bb882008-04-26 17:36:39 +0200319
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 ctl = pci_resource_start(dev, 2*port+1);
321 base = pci_resource_start(dev, 2*port);
322 if ((ctl && !base) || (base && !ctl)) {
323 printk(KERN_ERR "%s: inconsistent baseregs (BIOS) "
324 "for port %d, skipping\n", d->name, port);
325 return NULL;
326 }
327 }
Paolo Ciarrocchi846bb882008-04-26 17:36:39 +0200328 if (!ctl) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 /* Use default values */
330 ctl = port ? 0x374 : 0x3f4;
331 base = port ? 0x170 : 0x1f0;
332 }
Bartlomiej Zolnierkiewiczbad7c822008-04-26 17:36:31 +0200333
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +0200334 hwif = ide_find_port_slot(d);
Bartlomiej Zolnierkiewiczbad7c822008-04-26 17:36:31 +0200335 if (hwif == NULL) {
336 printk(KERN_ERR "%s: too many IDE interfaces, no room in "
337 "table\n", d->name);
338 return NULL;
339 }
Bartlomiej Zolnierkiewicz9239b332007-10-20 00:32:33 +0200340
Bartlomiej Zolnierkiewicz79127c32008-01-26 20:13:08 +0100341 memset(&hw, 0, sizeof(hw));
Bartlomiej Zolnierkiewiczaab8ad92008-04-18 00:46:35 +0200342 hw.irq = irq;
Bartlomiej Zolnierkiewicz79127c32008-01-26 20:13:08 +0100343 hw.dev = &dev->dev;
344 hw.chipset = d->chipset ? d->chipset : ide_pci;
345 ide_std_init_ports(&hw, base, ctl | 2);
346
Bartlomiej Zolnierkiewicz79127c32008-01-26 20:13:08 +0100347 ide_init_port_hw(hwif, &hw);
348
Bartlomiej Zolnierkiewicz36501652008-02-01 23:09:31 +0100349 hwif->dev = &dev->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 return hwif;
352}
353
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +0100354#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355/**
356 * ide_hwif_setup_dma - configure DMA interface
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200357 * @hwif: IDE interface
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +0100358 * @d: IDE port info
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 *
360 * Set up the DMA base for the interface. Enable the master bits as
361 * necessary and attempt to bring the device DMA into a ready to use
362 * state
363 */
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200364
Bartlomiej Zolnierkiewiczb123f562008-04-26 22:25:22 +0200365int ide_hwif_setup_dma(ide_hwif_t *hwif, const struct ide_port_info *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366{
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +0100367 struct pci_dev *dev = to_pci_dev(hwif->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368
Bartlomiej Zolnierkiewicz47b68782007-10-19 00:30:06 +0200369 if ((d->host_flags & IDE_HFLAG_NO_AUTODMA) == 0 ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE &&
371 (dev->class & 0x80))) {
Bartlomiej Zolnierkiewiczb123f562008-04-26 22:25:22 +0200372 unsigned long base = ide_pci_dma_base(hwif, d);
Bartlomiej Zolnierkiewicz23658f82008-04-26 22:25:21 +0200373
Bartlomiej Zolnierkiewicz63158d52008-04-26 22:25:21 +0200374 if (base == 0 || ide_pci_set_master(dev, d->name) < 0)
Bartlomiej Zolnierkiewiczb123f562008-04-26 22:25:22 +0200375 return -1;
Bartlomiej Zolnierkiewiczd54452f2008-04-26 22:25:21 +0200376
Bartlomiej Zolnierkiewicz63158d52008-04-26 22:25:21 +0200377 if (hwif->mmio)
378 printk(KERN_INFO " %s: MMIO-DMA\n", hwif->name);
379 else
380 printk(KERN_INFO " %s: BM-DMA at 0x%04lx-0x%04lx\n",
381 hwif->name, base, base + 7);
382
383 hwif->extra_base = base + (hwif->channel ? 8 : 16);
384
Bartlomiej Zolnierkiewiczb123f562008-04-26 22:25:22 +0200385 if (ide_allocate_dma_engine(hwif))
386 return -1;
387
Bartlomiej Zolnierkiewiczf37afda2008-04-26 22:25:24 +0200388 ide_setup_dma(hwif, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 }
Bartlomiej Zolnierkiewiczd54452f2008-04-26 22:25:21 +0200390
Bartlomiej Zolnierkiewiczb123f562008-04-26 22:25:22 +0200391 return 0;
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200392}
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +0100393#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394
395/**
396 * ide_setup_pci_controller - set up IDE PCI
397 * @dev: PCI device
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200398 * @d: IDE port info
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 * @noisy: verbose flag
400 * @config: returned as 1 if we configured the hardware
401 *
402 * Set up the PCI and controller side of the IDE interface. This brings
403 * up the PCI side of the device, checks that the device is enabled
404 * and enables it if need be
405 */
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200406
Bartlomiej Zolnierkiewicz85620432007-10-20 00:32:34 +0200407static int ide_setup_pci_controller(struct pci_dev *dev, const struct ide_port_info *d, int noisy, int *config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408{
409 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 u16 pcicmd;
411
412 if (noisy)
413 ide_setup_pci_noise(dev, d);
414
415 ret = ide_pci_enable(dev, d);
416 if (ret < 0)
417 goto out;
418
419 ret = pci_read_config_word(dev, PCI_COMMAND, &pcicmd);
420 if (ret < 0) {
421 printk(KERN_ERR "%s: error accessing PCI regs\n", d->name);
422 goto out;
423 }
424 if (!(pcicmd & PCI_COMMAND_IO)) { /* is device disabled? */
425 ret = ide_pci_configure(dev, d);
426 if (ret < 0)
427 goto out;
428 *config = 1;
429 printk(KERN_INFO "%s: device enabled (Linux)\n", d->name);
430 }
431
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432out:
433 return ret;
434}
435
436/**
437 * ide_pci_setup_ports - configure ports/devices on PCI IDE
438 * @dev: PCI device
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200439 * @d: IDE port info
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 * @pciirq: IRQ line
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +0200441 * @idx: ATA index table to update
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 *
443 * Scan the interfaces attached to this device and do any
444 * necessary per port setup. Attach the devices and ask the
445 * generic DMA layer to do its work for us.
446 *
447 * Normally called automaticall from do_ide_pci_setup_device,
448 * but is also used directly as a helper function by some controllers
449 * where the chipset setup is not the default PCI IDE one.
450 */
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +0200451
Bartlomiej Zolnierkiewicz85620432007-10-20 00:32:34 +0200452void ide_pci_setup_ports(struct pci_dev *dev, const struct ide_port_info *d, int pciirq, u8 *idx)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453{
Bartlomiej Zolnierkiewicza5d8c5c2007-07-20 01:11:55 +0200454 int channels = (d->host_flags & IDE_HFLAG_SINGLE) ? 1 : 2, port;
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +0100455 ide_hwif_t *hwif;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 u8 tmp;
457
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 /*
459 * Set up the IDE ports
460 */
Bartlomiej Zolnierkiewiczcf6e8542007-10-20 00:32:29 +0200461
Bartlomiej Zolnierkiewicza5d8c5c2007-07-20 01:11:55 +0200462 for (port = 0; port < channels; ++port) {
Bartlomiej Zolnierkiewicz85620432007-10-20 00:32:34 +0200463 const ide_pci_enablebit_t *e = &(d->enablebits[port]);
464
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 if (e->reg && (pci_read_config_byte(dev, e->reg, &tmp) ||
Bartlomiej Zolnierkiewiczcf6e8542007-10-20 00:32:29 +0200466 (tmp & e->mask) != e->val)) {
467 printk(KERN_INFO "%s: IDE port disabled\n", d->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 continue; /* port not enabled */
Bartlomiej Zolnierkiewiczcf6e8542007-10-20 00:32:29 +0200469 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470
Bartlomiej Zolnierkiewicz1ebf7492008-02-02 19:56:30 +0100471 hwif = ide_hwif_configure(dev, d, port, pciirq);
472 if (hwif == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 continue;
474
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +0200475 *(idx + port) = hwif->index;
Bartlomiej Zolnierkiewicz1ebf7492008-02-02 19:56:30 +0100476 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478EXPORT_SYMBOL_GPL(ide_pci_setup_ports);
479
480/*
481 * ide_setup_pci_device() looks at the primary/secondary interfaces
482 * on a PCI IDE device and, if they are enabled, prepares the IDE driver
483 * for use with them. This generic code works for most PCI chipsets.
484 *
485 * One thing that is not standardized is the location of the
486 * primary/secondary interface "enable/disable" bits. For chipsets that
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200487 * we "know" about, this information is in the struct ide_port_info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 * for all other chipsets, we just assume both interfaces are enabled.
489 */
Bartlomiej Zolnierkiewicz039788e2007-10-20 00:32:34 +0200490static int do_ide_setup_pci_device(struct pci_dev *dev,
Bartlomiej Zolnierkiewicz85620432007-10-20 00:32:34 +0200491 const struct ide_port_info *d,
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +0200492 u8 *idx, u8 noisy)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 int tried_config = 0;
495 int pciirq, ret;
496
497 ret = ide_setup_pci_controller(dev, d, noisy, &tried_config);
498 if (ret < 0)
499 goto out;
500
501 /*
502 * Can we trust the reported IRQ?
503 */
504 pciirq = dev->irq;
505
506 /* Is it an "IDE storage" device in non-PCI mode? */
507 if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE && (dev->class & 5) != 5) {
508 if (noisy)
509 printk(KERN_INFO "%s: not 100%% native mode: "
510 "will probe irqs later\n", d->name);
511 /*
512 * This allows offboard ide-pci cards the enable a BIOS,
513 * verify interrupt settings of split-mirror pci-config
514 * space, place chipset into init-mode, and/or preserve
515 * an interrupt if the card is not native ide support.
516 */
517 ret = d->init_chipset ? d->init_chipset(dev, d->name) : 0;
518 if (ret < 0)
519 goto out;
520 pciirq = ret;
521 } else if (tried_config) {
522 if (noisy)
523 printk(KERN_INFO "%s: will probe irqs later\n", d->name);
524 pciirq = 0;
525 } else if (!pciirq) {
526 if (noisy)
527 printk(KERN_WARNING "%s: bad irq (%d): will probe later\n",
528 d->name, pciirq);
529 pciirq = 0;
530 } else {
531 if (d->init_chipset) {
532 ret = d->init_chipset(dev, d->name);
533 if (ret < 0)
534 goto out;
535 }
536 if (noisy)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 printk(KERN_INFO "%s: 100%% native mode on irq %d\n",
538 d->name, pciirq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 }
540
541 /* FIXME: silent failure can happen */
542
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +0200543 ide_pci_setup_ports(dev, d, pciirq, idx);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544out:
545 return ret;
546}
547
Bartlomiej Zolnierkiewicz85620432007-10-20 00:32:34 +0200548int ide_setup_pci_device(struct pci_dev *dev, const struct ide_port_info *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549{
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +0200550 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551 int ret;
552
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +0200553 ret = do_ide_setup_pci_device(dev, d, &idx[0], 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +0200555 if (ret >= 0)
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +0100556 ide_device_add(idx, d);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 return ret;
559}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560EXPORT_SYMBOL_GPL(ide_setup_pci_device);
561
562int ide_setup_pci_devices(struct pci_dev *dev1, struct pci_dev *dev2,
Bartlomiej Zolnierkiewicz85620432007-10-20 00:32:34 +0200563 const struct ide_port_info *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564{
565 struct pci_dev *pdev[] = { dev1, dev2 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 int ret, i;
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +0200567 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568
569 for (i = 0; i < 2; i++) {
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +0200570 ret = do_ide_setup_pci_device(pdev[i], d, &idx[i*2], !i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571 /*
572 * FIXME: Mom, mom, they stole me the helper function to undo
573 * do_ide_setup_pci_device() on the first device!
574 */
575 if (ret < 0)
576 goto out;
577 }
578
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +0100579 ide_device_add(idx, d);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580out:
581 return ret;
582}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583EXPORT_SYMBOL_GPL(ide_setup_pci_devices);