Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * Copyright (C) 2000 Andre Hedrick <andre@linux-ide.org> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * Copyright (C) 2000 Mark Lord <mlord@pobox.com> |
Bartlomiej Zolnierkiewicz | 5fd216b | 2007-05-16 00:51:43 +0200 | [diff] [blame] | 4 | * Copyright (C) 2007 Bartlomiej Zolnierkiewicz |
| 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 |
| 7 | * |
| 8 | * Development of this chipset driver was funded |
| 9 | * by the nice folks at National Semiconductor. |
| 10 | * |
| 11 | * Documentation: |
| 12 | * CS5530 documentation available from National Semiconductor. |
| 13 | */ |
| 14 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/module.h> |
| 16 | #include <linux/types.h> |
| 17 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/hdreg.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/pci.h> |
| 20 | #include <linux/init.h> |
| 21 | #include <linux/ide.h> |
Bartlomiej Zolnierkiewicz | 78829dd | 2008-02-02 19:56:33 +0100 | [diff] [blame] | 22 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include <asm/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | /* |
| 26 | * Here are the standard PIO mode 0-4 timings for each "format". |
| 27 | * Format-0 uses fast data reg timings, with slower command reg timings. |
| 28 | * Format-1 uses fast timings for all registers, but won't work with all drives. |
| 29 | */ |
| 30 | static unsigned int cs5530_pio_timings[2][5] = { |
| 31 | {0x00009172, 0x00012171, 0x00020080, 0x00032010, 0x00040010}, |
| 32 | {0xd1329172, 0x71212171, 0x30200080, 0x20102010, 0x00100010} |
| 33 | }; |
| 34 | |
| 35 | /* |
| 36 | * After chip reset, the PIO timings are set to 0x0000e132, which is not valid. |
| 37 | */ |
| 38 | #define CS5530_BAD_PIO(timings) (((timings)&~0x80000000)==0x0000e132) |
| 39 | #define CS5530_BASEREG(hwif) (((hwif)->dma_base & ~0xf) + ((hwif)->channel ? 0x30 : 0x20)) |
| 40 | |
| 41 | /** |
Bartlomiej Zolnierkiewicz | 88b2b32 | 2007-10-13 17:47:51 +0200 | [diff] [blame] | 42 | * cs5530_set_pio_mode - set host controller for PIO mode |
Bartlomiej Zolnierkiewicz | 26bcb87 | 2007-10-11 23:54:00 +0200 | [diff] [blame] | 43 | * @drive: drive |
| 44 | * @pio: PIO mode number |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | * |
Bartlomiej Zolnierkiewicz | 88b2b32 | 2007-10-13 17:47:51 +0200 | [diff] [blame] | 46 | * Handles setting of PIO mode for the chipset. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | * |
Bartlomiej Zolnierkiewicz | 26bcb87 | 2007-10-11 23:54:00 +0200 | [diff] [blame] | 48 | * The init_hwif_cs5530() routine guarantees that all drives |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | * will have valid default PIO timings set up before we get here. |
| 50 | */ |
| 51 | |
Bartlomiej Zolnierkiewicz | 26bcb87 | 2007-10-11 23:54:00 +0200 | [diff] [blame] | 52 | static void cs5530_set_pio_mode(ide_drive_t *drive, const u8 pio) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | { |
Bartlomiej Zolnierkiewicz | 88b2b32 | 2007-10-13 17:47:51 +0200 | [diff] [blame] | 54 | unsigned long basereg = CS5530_BASEREG(drive->hwif); |
| 55 | unsigned int format = (inl(basereg + 4) >> 31) & 1; |
| 56 | |
| 57 | outl(cs5530_pio_timings[format][pio], basereg + ((drive->dn & 1)<<3)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | } |
| 59 | |
| 60 | /** |
Bartlomiej Zolnierkiewicz | 5fd216b | 2007-05-16 00:51:43 +0200 | [diff] [blame] | 61 | * cs5530_udma_filter - UDMA filter |
| 62 | * @drive: drive |
| 63 | * |
| 64 | * cs5530_udma_filter() does UDMA mask filtering for the given drive |
| 65 | * taking into the consideration capabilities of the mate device. |
| 66 | * |
| 67 | * The CS5530 specifies that two drives sharing a cable cannot mix |
| 68 | * UDMA/MDMA. It has to be one or the other, for the pair, though |
| 69 | * different timings can still be chosen for each drive. We could |
| 70 | * set the appropriate timing bits on the fly, but that might be |
| 71 | * a bit confusing. So, for now we statically handle this requirement |
| 72 | * by looking at our mate drive to see what it is capable of, before |
| 73 | * choosing a mode for our own drive. |
| 74 | * |
| 75 | * Note: This relies on the fact we never fail from UDMA to MWDMA2 |
| 76 | * but instead drop to PIO. |
| 77 | */ |
| 78 | |
| 79 | static u8 cs5530_udma_filter(ide_drive_t *drive) |
| 80 | { |
| 81 | ide_hwif_t *hwif = drive->hwif; |
| 82 | ide_drive_t *mate = &hwif->drives[(drive->dn & 1) ^ 1]; |
| 83 | struct hd_driveid *mateid = mate->id; |
| 84 | u8 mask = hwif->ultra_mask; |
| 85 | |
| 86 | if (mate->present == 0) |
| 87 | goto out; |
| 88 | |
| 89 | if ((mateid->capability & 1) && __ide_dma_bad_drive(mate) == 0) { |
| 90 | if ((mateid->field_valid & 4) && (mateid->dma_ultra & 7)) |
| 91 | goto out; |
| 92 | if ((mateid->field_valid & 2) && (mateid->dma_mword & 7)) |
| 93 | mask = 0; |
| 94 | } |
| 95 | out: |
| 96 | return mask; |
| 97 | } |
| 98 | |
Bartlomiej Zolnierkiewicz | 88b2b32 | 2007-10-13 17:47:51 +0200 | [diff] [blame] | 99 | static void cs5530_set_dma_mode(ide_drive_t *drive, const u8 mode) |
Bartlomiej Zolnierkiewicz | 3c3f5d2 | 2007-05-16 00:51:44 +0200 | [diff] [blame] | 100 | { |
| 101 | unsigned long basereg; |
| 102 | unsigned int reg, timings = 0; |
| 103 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | switch (mode) { |
| 105 | case XFER_UDMA_0: timings = 0x00921250; break; |
| 106 | case XFER_UDMA_1: timings = 0x00911140; break; |
| 107 | case XFER_UDMA_2: timings = 0x00911030; break; |
| 108 | case XFER_MW_DMA_0: timings = 0x00077771; break; |
| 109 | case XFER_MW_DMA_1: timings = 0x00012121; break; |
| 110 | case XFER_MW_DMA_2: timings = 0x00002020; break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | } |
Bartlomiej Zolnierkiewicz | 3c3f5d2 | 2007-05-16 00:51:44 +0200 | [diff] [blame] | 112 | basereg = CS5530_BASEREG(drive->hwif); |
Bartlomiej Zolnierkiewicz | 0ecdca2 | 2007-02-17 02:40:25 +0100 | [diff] [blame] | 113 | reg = inl(basereg + 4); /* get drive0 config register */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | timings |= reg & 0x80000000; /* preserve PIO format bit */ |
Bartlomiej Zolnierkiewicz | 3c3f5d2 | 2007-05-16 00:51:44 +0200 | [diff] [blame] | 115 | if ((drive-> dn & 1) == 0) { /* are we configuring drive0? */ |
Bartlomiej Zolnierkiewicz | 0ecdca2 | 2007-02-17 02:40:25 +0100 | [diff] [blame] | 116 | outl(timings, basereg + 4); /* write drive0 config register */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | } else { |
| 118 | if (timings & 0x00100000) |
| 119 | reg |= 0x00100000; /* enable UDMA timings for both drives */ |
| 120 | else |
| 121 | reg &= ~0x00100000; /* disable UDMA timings for both drives */ |
Bartlomiej Zolnierkiewicz | 0ecdca2 | 2007-02-17 02:40:25 +0100 | [diff] [blame] | 122 | outl(reg, basereg + 4); /* write drive0 config register */ |
| 123 | outl(timings, basereg + 12); /* write drive1 config register */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | } |
| 126 | |
| 127 | /** |
| 128 | * init_chipset_5530 - set up 5530 bridge |
| 129 | * @dev: PCI device |
| 130 | * @name: device name |
| 131 | * |
| 132 | * Initialize the cs5530 bridge for reliable IDE DMA operation. |
| 133 | */ |
| 134 | |
Herbert Xu | 88de8e9 | 2005-07-03 16:23:08 +0200 | [diff] [blame] | 135 | static unsigned int __devinit init_chipset_cs5530 (struct pci_dev *dev, const char *name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | { |
| 137 | struct pci_dev *master_0 = NULL, *cs5530_0 = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | |
Bartlomiej Zolnierkiewicz | f7b0d2d | 2007-08-20 22:42:56 +0200 | [diff] [blame] | 139 | if (pci_resource_start(dev, 4) == 0) |
| 140 | return -EFAULT; |
| 141 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | dev = NULL; |
Alan Cox | 652aa16 | 2006-10-03 01:14:35 -0700 | [diff] [blame] | 143 | while ((dev = pci_get_device(PCI_VENDOR_ID_CYRIX, PCI_ANY_ID, dev)) != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | switch (dev->device) { |
| 145 | case PCI_DEVICE_ID_CYRIX_PCI_MASTER: |
Alan Cox | 652aa16 | 2006-10-03 01:14:35 -0700 | [diff] [blame] | 146 | master_0 = pci_dev_get(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | break; |
| 148 | case PCI_DEVICE_ID_CYRIX_5530_LEGACY: |
Alan Cox | 652aa16 | 2006-10-03 01:14:35 -0700 | [diff] [blame] | 149 | cs5530_0 = pci_dev_get(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | break; |
| 151 | } |
| 152 | } |
| 153 | if (!master_0) { |
| 154 | printk(KERN_ERR "%s: unable to locate PCI MASTER function\n", name); |
Alan Cox | 652aa16 | 2006-10-03 01:14:35 -0700 | [diff] [blame] | 155 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | } |
| 157 | if (!cs5530_0) { |
| 158 | printk(KERN_ERR "%s: unable to locate CS5530 LEGACY function\n", name); |
Alan Cox | 652aa16 | 2006-10-03 01:14:35 -0700 | [diff] [blame] | 159 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | } |
| 161 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | /* |
| 163 | * Enable BusMaster and MemoryWriteAndInvalidate for the cs5530: |
| 164 | * --> OR 0x14 into 16-bit PCI COMMAND reg of function 0 of the cs5530 |
| 165 | */ |
| 166 | |
| 167 | pci_set_master(cs5530_0); |
Randy Dunlap | 694625c | 2007-07-09 11:55:54 -0700 | [diff] [blame] | 168 | pci_try_set_mwi(cs5530_0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | |
| 170 | /* |
| 171 | * Set PCI CacheLineSize to 16-bytes: |
| 172 | * --> Write 0x04 into 8-bit PCI CACHELINESIZE reg of function 0 of the cs5530 |
| 173 | */ |
| 174 | |
| 175 | pci_write_config_byte(cs5530_0, PCI_CACHE_LINE_SIZE, 0x04); |
| 176 | |
| 177 | /* |
| 178 | * Disable trapping of UDMA register accesses (Win98 hack): |
| 179 | * --> Write 0x5006 into 16-bit reg at offset 0xd0 of function 0 of the cs5530 |
| 180 | */ |
| 181 | |
| 182 | pci_write_config_word(cs5530_0, 0xd0, 0x5006); |
| 183 | |
| 184 | /* |
| 185 | * Bit-1 at 0x40 enables MemoryWriteAndInvalidate on internal X-bus: |
| 186 | * The other settings are what is necessary to get the register |
| 187 | * into a sane state for IDE DMA operation. |
| 188 | */ |
| 189 | |
| 190 | pci_write_config_byte(master_0, 0x40, 0x1e); |
| 191 | |
| 192 | /* |
| 193 | * Set max PCI burst size (16-bytes seems to work best): |
| 194 | * 16bytes: set bit-1 at 0x41 (reg value of 0x16) |
| 195 | * all others: clear bit-1 at 0x41, and do: |
| 196 | * 128bytes: OR 0x00 at 0x41 |
| 197 | * 256bytes: OR 0x04 at 0x41 |
| 198 | * 512bytes: OR 0x08 at 0x41 |
| 199 | * 1024bytes: OR 0x0c at 0x41 |
| 200 | */ |
| 201 | |
| 202 | pci_write_config_byte(master_0, 0x41, 0x14); |
| 203 | |
| 204 | /* |
| 205 | * These settings are necessary to get the chip |
| 206 | * into a sane state for IDE DMA operation. |
| 207 | */ |
| 208 | |
| 209 | pci_write_config_byte(master_0, 0x42, 0x00); |
| 210 | pci_write_config_byte(master_0, 0x43, 0xc1); |
| 211 | |
Alan Cox | 652aa16 | 2006-10-03 01:14:35 -0700 | [diff] [blame] | 212 | out: |
| 213 | pci_dev_put(master_0); |
| 214 | pci_dev_put(cs5530_0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | return 0; |
| 216 | } |
| 217 | |
| 218 | /** |
| 219 | * init_hwif_cs5530 - initialise an IDE channel |
| 220 | * @hwif: IDE to initialize |
| 221 | * |
| 222 | * This gets invoked by the IDE driver once for each channel. It |
| 223 | * performs channel-specific pre-initialization before drive probing. |
| 224 | */ |
| 225 | |
Herbert Xu | 88de8e9 | 2005-07-03 16:23:08 +0200 | [diff] [blame] | 226 | static void __devinit init_hwif_cs5530 (ide_hwif_t *hwif) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | { |
| 228 | unsigned long basereg; |
| 229 | u32 d0_timings; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | |
Bartlomiej Zolnierkiewicz | 26bcb87 | 2007-10-11 23:54:00 +0200 | [diff] [blame] | 231 | hwif->set_pio_mode = &cs5530_set_pio_mode; |
Bartlomiej Zolnierkiewicz | 88b2b32 | 2007-10-13 17:47:51 +0200 | [diff] [blame] | 232 | hwif->set_dma_mode = &cs5530_set_dma_mode; |
Bartlomiej Zolnierkiewicz | 3c3f5d2 | 2007-05-16 00:51:44 +0200 | [diff] [blame] | 233 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | basereg = CS5530_BASEREG(hwif); |
Bartlomiej Zolnierkiewicz | 0ecdca2 | 2007-02-17 02:40:25 +0100 | [diff] [blame] | 235 | d0_timings = inl(basereg + 0); |
Bartlomiej Zolnierkiewicz | 9310465 | 2007-10-16 22:29:53 +0200 | [diff] [blame] | 236 | if (CS5530_BAD_PIO(d0_timings)) |
Bartlomiej Zolnierkiewicz | 0ecdca2 | 2007-02-17 02:40:25 +0100 | [diff] [blame] | 237 | outl(cs5530_pio_timings[(d0_timings >> 31) & 1][0], basereg + 0); |
Bartlomiej Zolnierkiewicz | 9310465 | 2007-10-16 22:29:53 +0200 | [diff] [blame] | 238 | if (CS5530_BAD_PIO(inl(basereg + 8))) |
Bartlomiej Zolnierkiewicz | 0ecdca2 | 2007-02-17 02:40:25 +0100 | [diff] [blame] | 239 | outl(cs5530_pio_timings[(d0_timings >> 31) & 1][0], basereg + 8); |
Bartlomiej Zolnierkiewicz | 9310465 | 2007-10-16 22:29:53 +0200 | [diff] [blame] | 240 | |
Bartlomiej Zolnierkiewicz | f7b0d2d | 2007-08-20 22:42:56 +0200 | [diff] [blame] | 241 | if (hwif->dma_base == 0) |
| 242 | return; |
| 243 | |
Bartlomiej Zolnierkiewicz | 5fd216b | 2007-05-16 00:51:43 +0200 | [diff] [blame] | 244 | hwif->udma_filter = cs5530_udma_filter; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | } |
| 246 | |
Bartlomiej Zolnierkiewicz | 8562043 | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 247 | static const struct ide_port_info cs5530_chipset __devinitdata = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | .name = "CS5530", |
| 249 | .init_chipset = init_chipset_cs5530, |
| 250 | .init_hwif = init_hwif_cs5530, |
Bartlomiej Zolnierkiewicz | 1c51361 | 2007-10-19 00:30:10 +0200 | [diff] [blame] | 251 | .host_flags = IDE_HFLAG_SERIALIZE | |
| 252 | IDE_HFLAG_POST_SET_MODE | |
| 253 | IDE_HFLAG_BOOTABLE, |
Bartlomiej Zolnierkiewicz | 4099d14 | 2007-07-20 01:11:59 +0200 | [diff] [blame] | 254 | .pio_mask = ATA_PIO4, |
Bartlomiej Zolnierkiewicz | 5f8b6c3 | 2007-10-19 00:30:07 +0200 | [diff] [blame] | 255 | .mwdma_mask = ATA_MWDMA2, |
| 256 | .udma_mask = ATA_UDMA2, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | }; |
| 258 | |
| 259 | static int __devinit cs5530_init_one(struct pci_dev *dev, const struct pci_device_id *id) |
| 260 | { |
| 261 | return ide_setup_pci_device(dev, &cs5530_chipset); |
| 262 | } |
| 263 | |
Bartlomiej Zolnierkiewicz | 9cbcc5e | 2007-10-16 22:29:56 +0200 | [diff] [blame] | 264 | static const struct pci_device_id cs5530_pci_tbl[] = { |
| 265 | { PCI_VDEVICE(CYRIX, PCI_DEVICE_ID_CYRIX_5530_IDE), 0 }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | { 0, }, |
| 267 | }; |
| 268 | MODULE_DEVICE_TABLE(pci, cs5530_pci_tbl); |
| 269 | |
| 270 | static struct pci_driver driver = { |
| 271 | .name = "CS5530 IDE", |
| 272 | .id_table = cs5530_pci_tbl, |
| 273 | .probe = cs5530_init_one, |
| 274 | }; |
| 275 | |
Bartlomiej Zolnierkiewicz | 82ab1ee | 2007-01-27 13:46:56 +0100 | [diff] [blame] | 276 | static int __init cs5530_ide_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | { |
| 278 | return ide_pci_register_driver(&driver); |
| 279 | } |
| 280 | |
| 281 | module_init(cs5530_ide_init); |
| 282 | |
| 283 | MODULE_AUTHOR("Mark Lord"); |
| 284 | MODULE_DESCRIPTION("PCI driver module for Cyrix/NS 5530 IDE"); |
| 285 | MODULE_LICENSE("GPL"); |