Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * IDE tuning and bus mastering support for the CS5510/CS5520 |
| 3 | * chipsets |
| 4 | * |
| 5 | * The CS5510/CS5520 are slightly unusual devices. Unlike the |
| 6 | * typical IDE controllers they do bus mastering with the drive in |
| 7 | * PIO mode and smarter silicon. |
| 8 | * |
| 9 | * The practical upshot of this is that we must always tune the |
| 10 | * drive for the right PIO mode. We must also ignore all the blacklists |
| 11 | * and the drive bus mastering DMA information. |
| 12 | * |
| 13 | * *** This driver is strictly experimental *** |
| 14 | * |
| 15 | * (c) Copyright Red Hat Inc 2002 |
| 16 | * |
| 17 | * This program is free software; you can redistribute it and/or modify it |
| 18 | * under the terms of the GNU General Public License as published by the |
| 19 | * Free Software Foundation; either version 2, or (at your option) any |
| 20 | * later version. |
| 21 | * |
| 22 | * This program is distributed in the hope that it will be useful, but |
| 23 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 25 | * General Public License for more details. |
| 26 | * |
| 27 | * For the avoidance of doubt the "preferred form" of this code is one which |
| 28 | * is in an open non patent encumbered format. Where cryptographic key signing |
| 29 | * forms part of the process of creating an executable the information |
| 30 | * including keys needed to generate an equivalently functional executable |
| 31 | * are deemed to be part of the source code. |
| 32 | * |
| 33 | */ |
| 34 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <linux/module.h> |
| 36 | #include <linux/types.h> |
| 37 | #include <linux/kernel.h> |
| 38 | #include <linux/delay.h> |
| 39 | #include <linux/timer.h> |
| 40 | #include <linux/mm.h> |
| 41 | #include <linux/ioport.h> |
| 42 | #include <linux/blkdev.h> |
| 43 | #include <linux/hdreg.h> |
| 44 | |
| 45 | #include <linux/interrupt.h> |
| 46 | #include <linux/init.h> |
| 47 | #include <linux/pci.h> |
| 48 | #include <linux/ide.h> |
| 49 | #include <linux/dma-mapping.h> |
| 50 | |
| 51 | #include <asm/io.h> |
| 52 | #include <asm/irq.h> |
| 53 | |
| 54 | struct pio_clocks |
| 55 | { |
| 56 | int address; |
| 57 | int assert; |
| 58 | int recovery; |
| 59 | }; |
| 60 | |
| 61 | static struct pio_clocks cs5520_pio_clocks[]={ |
| 62 | {3, 6, 11}, |
| 63 | {2, 5, 6}, |
| 64 | {1, 4, 3}, |
| 65 | {1, 3, 2}, |
| 66 | {1, 2, 1} |
| 67 | }; |
| 68 | |
Bartlomiej Zolnierkiewicz | 8f4dd2e | 2007-10-11 23:54:02 +0200 | [diff] [blame] | 69 | static void cs5520_set_pio_mode(ide_drive_t *drive, const u8 pio) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | { |
| 71 | ide_hwif_t *hwif = HWIF(drive); |
Bartlomiej Zolnierkiewicz | 3650165 | 2008-02-01 23:09:31 +0100 | [diff] [blame^] | 72 | struct pci_dev *pdev = to_pci_dev(hwif->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | int controller = drive->dn > 1 ? 1 : 0; |
Bartlomiej Zolnierkiewicz | f212ff2 | 2007-10-11 23:53:59 +0200 | [diff] [blame] | 74 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | /* FIXME: if DMA = 1 do we need to set the DMA bit here ? */ |
| 76 | |
| 77 | /* 8bit CAT/CRT - 8bit command timing for channel */ |
| 78 | pci_write_config_byte(pdev, 0x62 + controller, |
| 79 | (cs5520_pio_clocks[pio].recovery << 4) | |
| 80 | (cs5520_pio_clocks[pio].assert)); |
| 81 | |
| 82 | /* 0x64 - 16bit Primary, 0x68 - 16bit Secondary */ |
| 83 | |
| 84 | /* FIXME: should these use address ? */ |
| 85 | /* Data read timing */ |
| 86 | pci_write_config_byte(pdev, 0x64 + 4*controller + (drive->dn&1), |
| 87 | (cs5520_pio_clocks[pio].recovery << 4) | |
| 88 | (cs5520_pio_clocks[pio].assert)); |
| 89 | /* Write command timing */ |
| 90 | pci_write_config_byte(pdev, 0x66 + 4*controller + (drive->dn&1), |
| 91 | (cs5520_pio_clocks[pio].recovery << 4) | |
| 92 | (cs5520_pio_clocks[pio].assert)); |
Bartlomiej Zolnierkiewicz | 326d72f | 2007-10-11 23:54:01 +0200 | [diff] [blame] | 93 | } |
Bartlomiej Zolnierkiewicz | 26bcb87 | 2007-10-11 23:54:00 +0200 | [diff] [blame] | 94 | |
Bartlomiej Zolnierkiewicz | 88b2b32 | 2007-10-13 17:47:51 +0200 | [diff] [blame] | 95 | static void cs5520_set_dma_mode(ide_drive_t *drive, const u8 speed) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | { |
Bartlomiej Zolnierkiewicz | 8f4dd2e | 2007-10-11 23:54:02 +0200 | [diff] [blame] | 97 | printk(KERN_ERR "cs55x0: bad ide timing.\n"); |
| 98 | |
| 99 | cs5520_set_pio_mode(drive, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | } |
| 101 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | * We wrap the DMA activate to set the vdma flag. This is needed |
| 104 | * so that the IDE DMA layer issues PIO not DMA commands over the |
| 105 | * DMA channel |
Bartlomiej Zolnierkiewicz | aea5d37 | 2008-01-26 20:12:59 +0100 | [diff] [blame] | 106 | * |
| 107 | * ATAPI is harder so disable it for now using IDE_HFLAG_NO_ATAPI_DMA |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | */ |
Bartlomiej Zolnierkiewicz | aea5d37 | 2008-01-26 20:12:59 +0100 | [diff] [blame] | 109 | |
Bartlomiej Zolnierkiewicz | 15ce926 | 2008-01-26 20:13:03 +0100 | [diff] [blame] | 110 | static void cs5520_dma_host_set(ide_drive_t *drive, int on) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | { |
Bartlomiej Zolnierkiewicz | 15ce926 | 2008-01-26 20:13:03 +0100 | [diff] [blame] | 112 | drive->vdma = on; |
| 113 | ide_dma_host_set(drive, on); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | } |
| 115 | |
| 116 | static void __devinit init_hwif_cs5520(ide_hwif_t *hwif) |
| 117 | { |
Bartlomiej Zolnierkiewicz | 26bcb87 | 2007-10-11 23:54:00 +0200 | [diff] [blame] | 118 | hwif->set_pio_mode = &cs5520_set_pio_mode; |
Bartlomiej Zolnierkiewicz | 88b2b32 | 2007-10-13 17:47:51 +0200 | [diff] [blame] | 119 | hwif->set_dma_mode = &cs5520_set_dma_mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | |
Bartlomiej Zolnierkiewicz | f0bb945 | 2007-10-19 00:30:11 +0200 | [diff] [blame] | 121 | if (hwif->dma_base == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | return; |
Bartlomiej Zolnierkiewicz | 326d72f | 2007-10-11 23:54:01 +0200 | [diff] [blame] | 123 | |
Bartlomiej Zolnierkiewicz | 15ce926 | 2008-01-26 20:13:03 +0100 | [diff] [blame] | 124 | hwif->dma_host_set = &cs5520_dma_host_set; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | } |
| 126 | |
| 127 | #define DECLARE_CS_DEV(name_str) \ |
| 128 | { \ |
| 129 | .name = name_str, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | .init_hwif = init_hwif_cs5520, \ |
Bartlomiej Zolnierkiewicz | 0ae2e17 | 2007-10-16 22:29:55 +0200 | [diff] [blame] | 131 | .host_flags = IDE_HFLAG_ISA_PORTS | \ |
Bartlomiej Zolnierkiewicz | 9ffcf36 | 2007-10-19 00:30:07 +0200 | [diff] [blame] | 132 | IDE_HFLAG_CS5520 | \ |
Bartlomiej Zolnierkiewicz | 33c1002 | 2007-10-19 00:30:06 +0200 | [diff] [blame] | 133 | IDE_HFLAG_VDMA | \ |
Bartlomiej Zolnierkiewicz | 7cab14a | 2007-10-19 00:30:06 +0200 | [diff] [blame] | 134 | IDE_HFLAG_NO_ATAPI_DMA | \ |
Bartlomiej Zolnierkiewicz | 4db90a1 | 2008-01-25 22:17:18 +0100 | [diff] [blame] | 135 | IDE_HFLAG_ABUSE_SET_DMA_MODE |\ |
Bartlomiej Zolnierkiewicz | 7cab14a | 2007-10-19 00:30:06 +0200 | [diff] [blame] | 136 | IDE_HFLAG_BOOTABLE, \ |
Bartlomiej Zolnierkiewicz | 4099d14 | 2007-07-20 01:11:59 +0200 | [diff] [blame] | 137 | .pio_mask = ATA_PIO4, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | } |
| 139 | |
Bartlomiej Zolnierkiewicz | 8562043 | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 140 | static const struct ide_port_info cyrix_chipsets[] __devinitdata = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | /* 0 */ DECLARE_CS_DEV("Cyrix 5510"), |
| 142 | /* 1 */ DECLARE_CS_DEV("Cyrix 5520") |
| 143 | }; |
| 144 | |
| 145 | /* |
| 146 | * The 5510/5520 are a bit weird. They don't quite set up the way |
| 147 | * the PCI helper layer expects so we must do much of the set up |
| 148 | * work longhand. |
| 149 | */ |
| 150 | |
| 151 | static int __devinit cs5520_init_one(struct pci_dev *dev, const struct pci_device_id *id) |
| 152 | { |
Bartlomiej Zolnierkiewicz | 8562043 | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 153 | const struct ide_port_info *d = &cyrix_chipsets[id->driver_data]; |
Bartlomiej Zolnierkiewicz | 8447d9d | 2007-10-20 00:32:31 +0200 | [diff] [blame] | 154 | u8 idx[4] = { 0xff, 0xff, 0xff, 0xff }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | |
| 156 | ide_setup_pci_noise(dev, d); |
| 157 | |
| 158 | /* We must not grab the entire device, it has 'ISA' space in its |
| 159 | BARS too and we will freak out other bits of the kernel */ |
Amit Gud | 1e39dea | 2005-11-18 23:03:19 +0100 | [diff] [blame] | 160 | if (pci_enable_device_bars(dev, 1<<2)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | printk(KERN_WARNING "%s: Unable to enable 55x0.\n", d->name); |
Amit Gud | 1e39dea | 2005-11-18 23:03:19 +0100 | [diff] [blame] | 162 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | } |
| 164 | pci_set_master(dev); |
| 165 | if (pci_set_dma_mask(dev, DMA_32BIT_MASK)) { |
| 166 | printk(KERN_WARNING "cs5520: No suitable DMA available.\n"); |
| 167 | return -ENODEV; |
| 168 | } |
| 169 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | /* |
| 171 | * Now the chipset is configured we can let the core |
| 172 | * do all the device setup for us |
| 173 | */ |
| 174 | |
Bartlomiej Zolnierkiewicz | 8447d9d | 2007-10-20 00:32:31 +0200 | [diff] [blame] | 175 | ide_pci_setup_ports(dev, d, 14, &idx[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | |
Bartlomiej Zolnierkiewicz | 8447d9d | 2007-10-20 00:32:31 +0200 | [diff] [blame] | 177 | ide_device_add(idx); |
Bartlomiej Zolnierkiewicz | 5cbf79c | 2007-05-10 00:01:11 +0200 | [diff] [blame] | 178 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | return 0; |
| 180 | } |
| 181 | |
Bartlomiej Zolnierkiewicz | 9cbcc5e | 2007-10-16 22:29:56 +0200 | [diff] [blame] | 182 | static const struct pci_device_id cs5520_pci_tbl[] = { |
| 183 | { PCI_VDEVICE(CYRIX, PCI_DEVICE_ID_CYRIX_5510), 0 }, |
| 184 | { PCI_VDEVICE(CYRIX, PCI_DEVICE_ID_CYRIX_5520), 1 }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | { 0, }, |
| 186 | }; |
| 187 | MODULE_DEVICE_TABLE(pci, cs5520_pci_tbl); |
| 188 | |
| 189 | static struct pci_driver driver = { |
| 190 | .name = "Cyrix_IDE", |
| 191 | .id_table = cs5520_pci_tbl, |
| 192 | .probe = cs5520_init_one, |
| 193 | }; |
| 194 | |
Bartlomiej Zolnierkiewicz | 82ab1ee | 2007-01-27 13:46:56 +0100 | [diff] [blame] | 195 | static int __init cs5520_ide_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | { |
| 197 | return ide_pci_register_driver(&driver); |
| 198 | } |
| 199 | |
| 200 | module_init(cs5520_ide_init); |
| 201 | |
| 202 | MODULE_AUTHOR("Alan Cox"); |
| 203 | MODULE_DESCRIPTION("PCI driver module for Cyrix 5510/5520 IDE"); |
| 204 | MODULE_LICENSE("GPL"); |