Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Bartlomiej Zolnierkiewicz | 59bca8c | 2008-02-01 23:09:33 +0100 | [diff] [blame] | 2 | * Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org> |
| 3 | * Copyright (C) 1995-1998 Mark Lord |
| 4 | * Copyright (C) 2007 Bartlomiej Zolnierkiewicz |
Bartlomiej Zolnierkiewicz | 58f189f | 2008-02-01 23:09:33 +0100 | [diff] [blame] | 5 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | * May be copied or modified under the terms of the GNU General Public License |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | */ |
| 8 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | #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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | /** |
| 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. |
| 30 | * Returns 0 on success or an errno code. |
| 31 | * |
| 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 | */ |
| 35 | |
| 36 | static int ide_setup_pci_baseregs (struct pci_dev *dev, const char *name) |
| 37 | { |
| 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 Zolnierkiewicz | 8ac2b42a | 2008-02-01 23:09:30 +0100 | [diff] [blame] | 64 | static 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | /** |
| 75 | * ide_get_or_set_dma_base - setup BMIBA |
Bartlomiej Zolnierkiewicz | 039788e | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 76 | * @d: IDE port info |
| 77 | * @hwif: IDE interface |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | * |
Bartlomiej Zolnierkiewicz | c58e79d | 2007-10-16 22:29:56 +0200 | [diff] [blame] | 79 | * 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | */ |
| 83 | |
Bartlomiej Zolnierkiewicz | 8562043 | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 84 | static unsigned long ide_get_or_set_dma_base(const struct ide_port_info *d, ide_hwif_t *hwif) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | { |
Bartlomiej Zolnierkiewicz | 3650165 | 2008-02-01 23:09:31 +0100 | [diff] [blame] | 86 | struct pci_dev *dev = to_pci_dev(hwif->dev); |
| 87 | unsigned long dma_base = 0; |
Bartlomiej Zolnierkiewicz | 8ac2b42a | 2008-02-01 23:09:30 +0100 | [diff] [blame] | 88 | u8 dma_stat = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | 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 Zolnierkiewicz | 9ffcf36 | 2007-10-19 00:30:07 +0200 | [diff] [blame] | 96 | u8 baridx = (d->host_flags & IDE_HFLAG_CS5520) ? 2 : 4; |
| 97 | |
| 98 | dma_base = pci_resource_start(dev, baridx); |
| 99 | |
Bartlomiej Zolnierkiewicz | aea5d37 | 2008-01-26 20:12:59 +0100 | [diff] [blame] | 100 | if (dma_base == 0) { |
Bartlomiej Zolnierkiewicz | 9ffcf36 | 2007-10-19 00:30:07 +0200 | [diff] [blame] | 101 | printk(KERN_ERR "%s: DMA base is invalid\n", d->name); |
Bartlomiej Zolnierkiewicz | aea5d37 | 2008-01-26 20:12:59 +0100 | [diff] [blame] | 102 | return 0; |
| 103 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | } |
| 105 | |
Bartlomiej Zolnierkiewicz | aea5d37 | 2008-01-26 20:12:59 +0100 | [diff] [blame] | 106 | if (hwif->channel) |
| 107 | dma_base += 8; |
| 108 | |
Bartlomiej Zolnierkiewicz | 8ac2b42a | 2008-02-01 23:09:30 +0100 | [diff] [blame] | 109 | if (d->host_flags & IDE_HFLAG_CS5520) |
| 110 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | |
Bartlomiej Zolnierkiewicz | 8ac2b42a | 2008-02-01 23:09:30 +0100 | [diff] [blame] | 112 | if (d->host_flags & IDE_HFLAG_CLEAR_SIMPLEX) { |
| 113 | ide_pci_clear_simplex(dma_base, d->name); |
| 114 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | } |
Bartlomiej Zolnierkiewicz | 8ac2b42a | 2008-02-01 23:09:30 +0100 | [diff] [blame] | 116 | |
| 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 | } |
| 132 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | return dma_base; |
| 134 | } |
| 135 | #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */ |
| 136 | |
Bartlomiej Zolnierkiewicz | 8562043 | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 137 | void ide_setup_pci_noise(struct pci_dev *dev, const struct ide_port_info *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | { |
Bartlomiej Zolnierkiewicz | bde07e5 | 2007-10-20 00:32:36 +0200 | [diff] [blame] | 139 | printk(KERN_INFO "%s: IDE controller (0x%04x:0x%04x rev 0x%02x) at " |
| 140 | " PCI slot %s\n", d->name, dev->vendor, dev->device, |
| 141 | dev->revision, pci_name(dev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | } |
| 143 | |
| 144 | EXPORT_SYMBOL_GPL(ide_setup_pci_noise); |
| 145 | |
| 146 | |
| 147 | /** |
| 148 | * ide_pci_enable - do PCI enables |
| 149 | * @dev: PCI device |
Bartlomiej Zolnierkiewicz | 039788e | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 150 | * @d: IDE port info |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | * |
| 152 | * Enable the IDE PCI device. We attempt to enable the device in full |
Benjamin Herrenschmidt | 0948391 | 2007-12-20 15:28:09 +1100 | [diff] [blame] | 153 | * but if that fails then we only need IO space. The PCI code should |
| 154 | * have setup the proper resources for us already for controllers in |
| 155 | * legacy mode. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | * |
| 157 | * Returns zero on success or an error code |
| 158 | */ |
Bartlomiej Zolnierkiewicz | 039788e | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 159 | |
Bartlomiej Zolnierkiewicz | 8562043 | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 160 | static int ide_pci_enable(struct pci_dev *dev, const struct ide_port_info *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | { |
| 162 | int ret; |
| 163 | |
| 164 | if (pci_enable_device(dev)) { |
Benjamin Herrenschmidt | 0948391 | 2007-12-20 15:28:09 +1100 | [diff] [blame] | 165 | ret = pci_enable_device_io(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | if (ret < 0) { |
| 167 | printk(KERN_WARNING "%s: (ide_setup_pci_device:) " |
| 168 | "Could not enable device.\n", d->name); |
| 169 | goto out; |
| 170 | } |
| 171 | printk(KERN_WARNING "%s: BIOS configuration fixed.\n", d->name); |
| 172 | } |
| 173 | |
| 174 | /* |
Bartlomiej Zolnierkiewicz | 039788e | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 175 | * assume all devices can do 32-bit DMA for now, we can add |
| 176 | * a DMA mask field to the struct ide_port_info if we need it |
| 177 | * (or let lower level driver set the DMA mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | */ |
| 179 | ret = pci_set_dma_mask(dev, DMA_32BIT_MASK); |
| 180 | if (ret < 0) { |
| 181 | printk(KERN_ERR "%s: can't set dma mask\n", d->name); |
| 182 | goto out; |
| 183 | } |
| 184 | |
| 185 | /* FIXME: Temporary - until we put in the hotplug interface logic |
| 186 | Check that the bits we want are not in use by someone else. */ |
| 187 | ret = pci_request_region(dev, 4, "ide_tmp"); |
| 188 | if (ret < 0) |
| 189 | goto out; |
| 190 | |
| 191 | pci_release_region(dev, 4); |
| 192 | out: |
| 193 | return ret; |
| 194 | } |
| 195 | |
| 196 | /** |
| 197 | * ide_pci_configure - configure an unconfigured device |
| 198 | * @dev: PCI device |
Bartlomiej Zolnierkiewicz | 039788e | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 199 | * @d: IDE port info |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | * |
| 201 | * Enable and configure the PCI device we have been passed. |
| 202 | * Returns zero on success or an error code. |
| 203 | */ |
Bartlomiej Zolnierkiewicz | 039788e | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 204 | |
Bartlomiej Zolnierkiewicz | 8562043 | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 205 | static int ide_pci_configure(struct pci_dev *dev, const struct ide_port_info *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | { |
| 207 | u16 pcicmd = 0; |
| 208 | /* |
| 209 | * PnP BIOS was *supposed* to have setup this device, but we |
| 210 | * can do it ourselves, so long as the BIOS has assigned an IRQ |
| 211 | * (or possibly the device is using a "legacy header" for IRQs). |
| 212 | * Maybe the user deliberately *disabled* the device, |
| 213 | * but we'll eventually ignore it again if no drives respond. |
| 214 | */ |
| 215 | if (ide_setup_pci_baseregs(dev, d->name) || pci_write_config_word(dev, PCI_COMMAND, pcicmd|PCI_COMMAND_IO)) |
| 216 | { |
| 217 | printk(KERN_INFO "%s: device disabled (BIOS)\n", d->name); |
| 218 | return -ENODEV; |
| 219 | } |
| 220 | if (pci_read_config_word(dev, PCI_COMMAND, &pcicmd)) { |
| 221 | printk(KERN_ERR "%s: error accessing PCI regs\n", d->name); |
| 222 | return -EIO; |
| 223 | } |
| 224 | if (!(pcicmd & PCI_COMMAND_IO)) { |
| 225 | printk(KERN_ERR "%s: unable to enable IDE controller\n", d->name); |
| 226 | return -ENXIO; |
| 227 | } |
| 228 | return 0; |
| 229 | } |
| 230 | |
| 231 | /** |
| 232 | * ide_pci_check_iomem - check a register is I/O |
Bartlomiej Zolnierkiewicz | 039788e | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 233 | * @dev: PCI device |
| 234 | * @d: IDE port info |
| 235 | * @bar: BAR number |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | * |
Sergei Shtylyov | 1baccff | 2008-04-26 17:36:31 +0200 | [diff] [blame] | 237 | * Checks if a BAR is configured and points to MMIO space. If so, |
| 238 | * return an error code. Otherwise return 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | */ |
Bartlomiej Zolnierkiewicz | 039788e | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 240 | |
Sergei Shtylyov | 1baccff | 2008-04-26 17:36:31 +0200 | [diff] [blame] | 241 | static int ide_pci_check_iomem(struct pci_dev *dev, const struct ide_port_info *d, |
| 242 | int bar) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | { |
| 244 | ulong flags = pci_resource_flags(dev, bar); |
| 245 | |
| 246 | /* Unconfigured ? */ |
| 247 | if (!flags || pci_resource_len(dev, bar) == 0) |
| 248 | return 0; |
| 249 | |
Sergei Shtylyov | 1baccff | 2008-04-26 17:36:31 +0200 | [diff] [blame] | 250 | /* I/O space */ |
| 251 | if (flags & IORESOURCE_IO) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | return 0; |
| 253 | |
| 254 | /* Bad */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | return -EINVAL; |
| 256 | } |
| 257 | |
| 258 | /** |
| 259 | * ide_hwif_configure - configure an IDE interface |
| 260 | * @dev: PCI device holding interface |
Bartlomiej Zolnierkiewicz | 039788e | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 261 | * @d: IDE port info |
Bartlomiej Zolnierkiewicz | 1ebf749 | 2008-02-02 19:56:30 +0100 | [diff] [blame] | 262 | * @port: port number |
| 263 | * @irq: PCI IRQ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | * |
| 265 | * Perform the initial set up for the hardware interface structure. This |
| 266 | * is done per interface port rather than per PCI device. There may be |
| 267 | * more than one port per device. |
| 268 | * |
| 269 | * Returns the new hardware interface structure, or NULL on a failure |
| 270 | */ |
Bartlomiej Zolnierkiewicz | 039788e | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 271 | |
Bartlomiej Zolnierkiewicz | 1ebf749 | 2008-02-02 19:56:30 +0100 | [diff] [blame] | 272 | static ide_hwif_t *ide_hwif_configure(struct pci_dev *dev, |
| 273 | const struct ide_port_info *d, |
| 274 | unsigned int port, int irq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | { |
| 276 | unsigned long ctl = 0, base = 0; |
| 277 | ide_hwif_t *hwif; |
Bartlomiej Zolnierkiewicz | 79127c3 | 2008-01-26 20:13:08 +0100 | [diff] [blame] | 278 | struct hw_regs_s hw; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | |
Bartlomiej Zolnierkiewicz | a5d8c5c | 2007-07-20 01:11:55 +0200 | [diff] [blame] | 280 | if ((d->host_flags & IDE_HFLAG_ISA_PORTS) == 0) { |
Sergei Shtylyov | 1baccff | 2008-04-26 17:36:31 +0200 | [diff] [blame] | 281 | if (ide_pci_check_iomem(dev, d, 2 * port) || |
| 282 | ide_pci_check_iomem(dev, d, 2 * port + 1)) { |
| 283 | printk(KERN_ERR "%s: I/O baseregs (BIOS) are reported " |
| 284 | "as MEM for port %d!\n", d->name, port); |
| 285 | return NULL; |
| 286 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | |
| 288 | ctl = pci_resource_start(dev, 2*port+1); |
| 289 | base = pci_resource_start(dev, 2*port); |
| 290 | if ((ctl && !base) || (base && !ctl)) { |
| 291 | printk(KERN_ERR "%s: inconsistent baseregs (BIOS) " |
| 292 | "for port %d, skipping\n", d->name, port); |
| 293 | return NULL; |
| 294 | } |
| 295 | } |
| 296 | if (!ctl) |
| 297 | { |
| 298 | /* Use default values */ |
| 299 | ctl = port ? 0x374 : 0x3f4; |
| 300 | base = port ? 0x170 : 0x1f0; |
| 301 | } |
Bartlomiej Zolnierkiewicz | bad7c82 | 2008-04-26 17:36:31 +0200 | [diff] [blame] | 302 | |
Bartlomiej Zolnierkiewicz | fe80b93 | 2008-04-26 17:36:36 +0200 | [diff] [blame] | 303 | hwif = ide_find_port_slot(d); |
Bartlomiej Zolnierkiewicz | bad7c82 | 2008-04-26 17:36:31 +0200 | [diff] [blame] | 304 | if (hwif == NULL) { |
| 305 | printk(KERN_ERR "%s: too many IDE interfaces, no room in " |
| 306 | "table\n", d->name); |
| 307 | return NULL; |
| 308 | } |
Bartlomiej Zolnierkiewicz | 9239b33 | 2007-10-20 00:32:33 +0200 | [diff] [blame] | 309 | |
Bartlomiej Zolnierkiewicz | 79127c3 | 2008-01-26 20:13:08 +0100 | [diff] [blame] | 310 | memset(&hw, 0, sizeof(hw)); |
Bartlomiej Zolnierkiewicz | aab8ad9 | 2008-04-18 00:46:35 +0200 | [diff] [blame] | 311 | hw.irq = irq; |
Bartlomiej Zolnierkiewicz | 79127c3 | 2008-01-26 20:13:08 +0100 | [diff] [blame] | 312 | hw.dev = &dev->dev; |
| 313 | hw.chipset = d->chipset ? d->chipset : ide_pci; |
| 314 | ide_std_init_ports(&hw, base, ctl | 2); |
| 315 | |
Bartlomiej Zolnierkiewicz | 79127c3 | 2008-01-26 20:13:08 +0100 | [diff] [blame] | 316 | ide_init_port_hw(hwif, &hw); |
| 317 | |
Bartlomiej Zolnierkiewicz | 3650165 | 2008-02-01 23:09:31 +0100 | [diff] [blame] | 318 | hwif->dev = &dev->dev; |
Bartlomiej Zolnierkiewicz | 039788e | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 319 | hwif->cds = d; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | return hwif; |
| 322 | } |
| 323 | |
Bartlomiej Zolnierkiewicz | c413b9b | 2008-02-02 19:56:31 +0100 | [diff] [blame] | 324 | #ifdef CONFIG_BLK_DEV_IDEDMA_PCI |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | /** |
| 326 | * ide_hwif_setup_dma - configure DMA interface |
Bartlomiej Zolnierkiewicz | 039788e | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 327 | * @hwif: IDE interface |
Bartlomiej Zolnierkiewicz | c413b9b | 2008-02-02 19:56:31 +0100 | [diff] [blame] | 328 | * @d: IDE port info |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | * |
| 330 | * Set up the DMA base for the interface. Enable the master bits as |
| 331 | * necessary and attempt to bring the device DMA into a ready to use |
| 332 | * state |
| 333 | */ |
Bartlomiej Zolnierkiewicz | 039788e | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 334 | |
Bartlomiej Zolnierkiewicz | c413b9b | 2008-02-02 19:56:31 +0100 | [diff] [blame] | 335 | void ide_hwif_setup_dma(ide_hwif_t *hwif, const struct ide_port_info *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | { |
Bartlomiej Zolnierkiewicz | c413b9b | 2008-02-02 19:56:31 +0100 | [diff] [blame] | 337 | struct pci_dev *dev = to_pci_dev(hwif->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | u16 pcicmd; |
Bartlomiej Zolnierkiewicz | 47b6878 | 2007-10-19 00:30:06 +0200 | [diff] [blame] | 339 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | pci_read_config_word(dev, PCI_COMMAND, &pcicmd); |
| 341 | |
Bartlomiej Zolnierkiewicz | 47b6878 | 2007-10-19 00:30:06 +0200 | [diff] [blame] | 342 | if ((d->host_flags & IDE_HFLAG_NO_AUTODMA) == 0 || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE && |
| 344 | (dev->class & 0x80))) { |
Bartlomiej Zolnierkiewicz | 9ffcf36 | 2007-10-19 00:30:07 +0200 | [diff] [blame] | 345 | unsigned long dma_base = ide_get_or_set_dma_base(d, hwif); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | if (dma_base && !(pcicmd & PCI_COMMAND_MASTER)) { |
| 347 | /* |
| 348 | * Set up BM-DMA capability |
| 349 | * (PnP BIOS should have done this) |
| 350 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | pci_set_master(dev); |
| 352 | if (pci_read_config_word(dev, PCI_COMMAND, &pcicmd) || !(pcicmd & PCI_COMMAND_MASTER)) { |
| 353 | printk(KERN_ERR "%s: %s error updating PCICMD\n", |
| 354 | hwif->name, d->name); |
| 355 | dma_base = 0; |
| 356 | } |
| 357 | } |
| 358 | if (dma_base) { |
| 359 | if (d->init_dma) { |
| 360 | d->init_dma(hwif, dma_base); |
| 361 | } else { |
Sergei Shtylyov | ecf32796 | 2008-02-01 23:09:30 +0100 | [diff] [blame] | 362 | ide_setup_dma(hwif, dma_base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | } |
| 364 | } else { |
| 365 | printk(KERN_INFO "%s: %s Bus-Master DMA disabled " |
| 366 | "(BIOS)\n", hwif->name, d->name); |
| 367 | } |
| 368 | } |
Bartlomiej Zolnierkiewicz | 039788e | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 369 | } |
Bartlomiej Zolnierkiewicz | c413b9b | 2008-02-02 19:56:31 +0100 | [diff] [blame] | 370 | #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | |
| 372 | /** |
| 373 | * ide_setup_pci_controller - set up IDE PCI |
| 374 | * @dev: PCI device |
Bartlomiej Zolnierkiewicz | 039788e | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 375 | * @d: IDE port info |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | * @noisy: verbose flag |
| 377 | * @config: returned as 1 if we configured the hardware |
| 378 | * |
| 379 | * Set up the PCI and controller side of the IDE interface. This brings |
| 380 | * up the PCI side of the device, checks that the device is enabled |
| 381 | * and enables it if need be |
| 382 | */ |
Bartlomiej Zolnierkiewicz | 039788e | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 383 | |
Bartlomiej Zolnierkiewicz | 8562043 | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 384 | static int ide_setup_pci_controller(struct pci_dev *dev, const struct ide_port_info *d, int noisy, int *config) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | { |
| 386 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | u16 pcicmd; |
| 388 | |
| 389 | if (noisy) |
| 390 | ide_setup_pci_noise(dev, d); |
| 391 | |
| 392 | ret = ide_pci_enable(dev, d); |
| 393 | if (ret < 0) |
| 394 | goto out; |
| 395 | |
| 396 | ret = pci_read_config_word(dev, PCI_COMMAND, &pcicmd); |
| 397 | if (ret < 0) { |
| 398 | printk(KERN_ERR "%s: error accessing PCI regs\n", d->name); |
| 399 | goto out; |
| 400 | } |
| 401 | if (!(pcicmd & PCI_COMMAND_IO)) { /* is device disabled? */ |
| 402 | ret = ide_pci_configure(dev, d); |
| 403 | if (ret < 0) |
| 404 | goto out; |
| 405 | *config = 1; |
| 406 | printk(KERN_INFO "%s: device enabled (Linux)\n", d->name); |
| 407 | } |
| 408 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | out: |
| 410 | return ret; |
| 411 | } |
| 412 | |
| 413 | /** |
| 414 | * ide_pci_setup_ports - configure ports/devices on PCI IDE |
| 415 | * @dev: PCI device |
Bartlomiej Zolnierkiewicz | 039788e | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 416 | * @d: IDE port info |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | * @pciirq: IRQ line |
Bartlomiej Zolnierkiewicz | 8447d9d | 2007-10-20 00:32:31 +0200 | [diff] [blame] | 418 | * @idx: ATA index table to update |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | * |
| 420 | * Scan the interfaces attached to this device and do any |
| 421 | * necessary per port setup. Attach the devices and ask the |
| 422 | * generic DMA layer to do its work for us. |
| 423 | * |
| 424 | * Normally called automaticall from do_ide_pci_setup_device, |
| 425 | * but is also used directly as a helper function by some controllers |
| 426 | * where the chipset setup is not the default PCI IDE one. |
| 427 | */ |
Bartlomiej Zolnierkiewicz | 8447d9d | 2007-10-20 00:32:31 +0200 | [diff] [blame] | 428 | |
Bartlomiej Zolnierkiewicz | 8562043 | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 429 | void ide_pci_setup_ports(struct pci_dev *dev, const struct ide_port_info *d, int pciirq, u8 *idx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | { |
Bartlomiej Zolnierkiewicz | a5d8c5c | 2007-07-20 01:11:55 +0200 | [diff] [blame] | 431 | int channels = (d->host_flags & IDE_HFLAG_SINGLE) ? 1 : 2, port; |
Bartlomiej Zolnierkiewicz | c413b9b | 2008-02-02 19:56:31 +0100 | [diff] [blame] | 432 | ide_hwif_t *hwif; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | u8 tmp; |
| 434 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | /* |
| 436 | * Set up the IDE ports |
| 437 | */ |
Bartlomiej Zolnierkiewicz | cf6e854 | 2007-10-20 00:32:29 +0200 | [diff] [blame] | 438 | |
Bartlomiej Zolnierkiewicz | a5d8c5c | 2007-07-20 01:11:55 +0200 | [diff] [blame] | 439 | for (port = 0; port < channels; ++port) { |
Bartlomiej Zolnierkiewicz | 8562043 | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 440 | const ide_pci_enablebit_t *e = &(d->enablebits[port]); |
| 441 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | if (e->reg && (pci_read_config_byte(dev, e->reg, &tmp) || |
Bartlomiej Zolnierkiewicz | cf6e854 | 2007-10-20 00:32:29 +0200 | [diff] [blame] | 443 | (tmp & e->mask) != e->val)) { |
| 444 | printk(KERN_INFO "%s: IDE port disabled\n", d->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | continue; /* port not enabled */ |
Bartlomiej Zolnierkiewicz | cf6e854 | 2007-10-20 00:32:29 +0200 | [diff] [blame] | 446 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | |
Bartlomiej Zolnierkiewicz | 1ebf749 | 2008-02-02 19:56:30 +0100 | [diff] [blame] | 448 | hwif = ide_hwif_configure(dev, d, port, pciirq); |
| 449 | if (hwif == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | continue; |
| 451 | |
Bartlomiej Zolnierkiewicz | 8447d9d | 2007-10-20 00:32:31 +0200 | [diff] [blame] | 452 | *(idx + port) = hwif->index; |
Bartlomiej Zolnierkiewicz | 1ebf749 | 2008-02-02 19:56:30 +0100 | [diff] [blame] | 453 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | } |
| 455 | |
| 456 | EXPORT_SYMBOL_GPL(ide_pci_setup_ports); |
| 457 | |
| 458 | /* |
| 459 | * ide_setup_pci_device() looks at the primary/secondary interfaces |
| 460 | * on a PCI IDE device and, if they are enabled, prepares the IDE driver |
| 461 | * for use with them. This generic code works for most PCI chipsets. |
| 462 | * |
| 463 | * One thing that is not standardized is the location of the |
| 464 | * primary/secondary interface "enable/disable" bits. For chipsets that |
Bartlomiej Zolnierkiewicz | 039788e | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 465 | * we "know" about, this information is in the struct ide_port_info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | * for all other chipsets, we just assume both interfaces are enabled. |
| 467 | */ |
Bartlomiej Zolnierkiewicz | 039788e | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 468 | static int do_ide_setup_pci_device(struct pci_dev *dev, |
Bartlomiej Zolnierkiewicz | 8562043 | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 469 | const struct ide_port_info *d, |
Bartlomiej Zolnierkiewicz | 8447d9d | 2007-10-20 00:32:31 +0200 | [diff] [blame] | 470 | u8 *idx, u8 noisy) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | int tried_config = 0; |
| 473 | int pciirq, ret; |
| 474 | |
| 475 | ret = ide_setup_pci_controller(dev, d, noisy, &tried_config); |
| 476 | if (ret < 0) |
| 477 | goto out; |
| 478 | |
| 479 | /* |
| 480 | * Can we trust the reported IRQ? |
| 481 | */ |
| 482 | pciirq = dev->irq; |
| 483 | |
| 484 | /* Is it an "IDE storage" device in non-PCI mode? */ |
| 485 | if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE && (dev->class & 5) != 5) { |
| 486 | if (noisy) |
| 487 | printk(KERN_INFO "%s: not 100%% native mode: " |
| 488 | "will probe irqs later\n", d->name); |
| 489 | /* |
| 490 | * This allows offboard ide-pci cards the enable a BIOS, |
| 491 | * verify interrupt settings of split-mirror pci-config |
| 492 | * space, place chipset into init-mode, and/or preserve |
| 493 | * an interrupt if the card is not native ide support. |
| 494 | */ |
| 495 | ret = d->init_chipset ? d->init_chipset(dev, d->name) : 0; |
| 496 | if (ret < 0) |
| 497 | goto out; |
| 498 | pciirq = ret; |
| 499 | } else if (tried_config) { |
| 500 | if (noisy) |
| 501 | printk(KERN_INFO "%s: will probe irqs later\n", d->name); |
| 502 | pciirq = 0; |
| 503 | } else if (!pciirq) { |
| 504 | if (noisy) |
| 505 | printk(KERN_WARNING "%s: bad irq (%d): will probe later\n", |
| 506 | d->name, pciirq); |
| 507 | pciirq = 0; |
| 508 | } else { |
| 509 | if (d->init_chipset) { |
| 510 | ret = d->init_chipset(dev, d->name); |
| 511 | if (ret < 0) |
| 512 | goto out; |
| 513 | } |
| 514 | if (noisy) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | printk(KERN_INFO "%s: 100%% native mode on irq %d\n", |
| 516 | d->name, pciirq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | } |
| 518 | |
| 519 | /* FIXME: silent failure can happen */ |
| 520 | |
Bartlomiej Zolnierkiewicz | 8447d9d | 2007-10-20 00:32:31 +0200 | [diff] [blame] | 521 | ide_pci_setup_ports(dev, d, pciirq, idx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | out: |
| 523 | return ret; |
| 524 | } |
| 525 | |
Bartlomiej Zolnierkiewicz | 8562043 | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 526 | int ide_setup_pci_device(struct pci_dev *dev, const struct ide_port_info *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | { |
Bartlomiej Zolnierkiewicz | 8447d9d | 2007-10-20 00:32:31 +0200 | [diff] [blame] | 528 | u8 idx[4] = { 0xff, 0xff, 0xff, 0xff }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | int ret; |
| 530 | |
Bartlomiej Zolnierkiewicz | 8447d9d | 2007-10-20 00:32:31 +0200 | [diff] [blame] | 531 | ret = do_ide_setup_pci_device(dev, d, &idx[0], 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | |
Bartlomiej Zolnierkiewicz | 8447d9d | 2007-10-20 00:32:31 +0200 | [diff] [blame] | 533 | if (ret >= 0) |
Bartlomiej Zolnierkiewicz | c413b9b | 2008-02-02 19:56:31 +0100 | [diff] [blame] | 534 | ide_device_add(idx, d); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | return ret; |
| 537 | } |
| 538 | |
| 539 | EXPORT_SYMBOL_GPL(ide_setup_pci_device); |
| 540 | |
| 541 | int ide_setup_pci_devices(struct pci_dev *dev1, struct pci_dev *dev2, |
Bartlomiej Zolnierkiewicz | 8562043 | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 542 | const struct ide_port_info *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | { |
| 544 | struct pci_dev *pdev[] = { dev1, dev2 }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | int ret, i; |
Bartlomiej Zolnierkiewicz | 8447d9d | 2007-10-20 00:32:31 +0200 | [diff] [blame] | 546 | u8 idx[4] = { 0xff, 0xff, 0xff, 0xff }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | |
| 548 | for (i = 0; i < 2; i++) { |
Bartlomiej Zolnierkiewicz | 8447d9d | 2007-10-20 00:32:31 +0200 | [diff] [blame] | 549 | ret = do_ide_setup_pci_device(pdev[i], d, &idx[i*2], !i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | /* |
| 551 | * FIXME: Mom, mom, they stole me the helper function to undo |
| 552 | * do_ide_setup_pci_device() on the first device! |
| 553 | */ |
| 554 | if (ret < 0) |
| 555 | goto out; |
| 556 | } |
| 557 | |
Bartlomiej Zolnierkiewicz | c413b9b | 2008-02-02 19:56:31 +0100 | [diff] [blame] | 558 | ide_device_add(idx, d); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | out: |
| 560 | return ret; |
| 561 | } |
| 562 | |
| 563 | EXPORT_SYMBOL_GPL(ide_setup_pci_devices); |