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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <linux/hdreg.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include <linux/init.h> |
| 40 | #include <linux/pci.h> |
| 41 | #include <linux/ide.h> |
| 42 | #include <linux/dma-mapping.h> |
| 43 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | struct pio_clocks |
| 45 | { |
| 46 | int address; |
| 47 | int assert; |
| 48 | int recovery; |
| 49 | }; |
| 50 | |
| 51 | static struct pio_clocks cs5520_pio_clocks[]={ |
| 52 | {3, 6, 11}, |
| 53 | {2, 5, 6}, |
| 54 | {1, 4, 3}, |
| 55 | {1, 3, 2}, |
| 56 | {1, 2, 1} |
| 57 | }; |
| 58 | |
Bartlomiej Zolnierkiewicz | 8f4dd2e | 2007-10-11 23:54:02 +0200 | [diff] [blame] | 59 | 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] | 60 | { |
| 61 | ide_hwif_t *hwif = HWIF(drive); |
Bartlomiej Zolnierkiewicz | 3650165 | 2008-02-01 23:09:31 +0100 | [diff] [blame] | 62 | struct pci_dev *pdev = to_pci_dev(hwif->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | int controller = drive->dn > 1 ? 1 : 0; |
Bartlomiej Zolnierkiewicz | f212ff2 | 2007-10-11 23:53:59 +0200 | [diff] [blame] | 64 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | /* FIXME: if DMA = 1 do we need to set the DMA bit here ? */ |
| 66 | |
| 67 | /* 8bit CAT/CRT - 8bit command timing for channel */ |
| 68 | pci_write_config_byte(pdev, 0x62 + controller, |
| 69 | (cs5520_pio_clocks[pio].recovery << 4) | |
| 70 | (cs5520_pio_clocks[pio].assert)); |
| 71 | |
| 72 | /* 0x64 - 16bit Primary, 0x68 - 16bit Secondary */ |
| 73 | |
| 74 | /* FIXME: should these use address ? */ |
| 75 | /* Data read timing */ |
| 76 | pci_write_config_byte(pdev, 0x64 + 4*controller + (drive->dn&1), |
| 77 | (cs5520_pio_clocks[pio].recovery << 4) | |
| 78 | (cs5520_pio_clocks[pio].assert)); |
| 79 | /* Write command timing */ |
| 80 | pci_write_config_byte(pdev, 0x66 + 4*controller + (drive->dn&1), |
| 81 | (cs5520_pio_clocks[pio].recovery << 4) | |
| 82 | (cs5520_pio_clocks[pio].assert)); |
Bartlomiej Zolnierkiewicz | 326d72f | 2007-10-11 23:54:01 +0200 | [diff] [blame] | 83 | } |
Bartlomiej Zolnierkiewicz | 26bcb87 | 2007-10-11 23:54:00 +0200 | [diff] [blame] | 84 | |
Bartlomiej Zolnierkiewicz | 88b2b32 | 2007-10-13 17:47:51 +0200 | [diff] [blame] | 85 | 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] | 86 | { |
Bartlomiej Zolnierkiewicz | 8f4dd2e | 2007-10-11 23:54:02 +0200 | [diff] [blame] | 87 | printk(KERN_ERR "cs55x0: bad ide timing.\n"); |
| 88 | |
| 89 | cs5520_set_pio_mode(drive, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | } |
| 91 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | * We wrap the DMA activate to set the vdma flag. This is needed |
| 94 | * so that the IDE DMA layer issues PIO not DMA commands over the |
| 95 | * DMA channel |
Bartlomiej Zolnierkiewicz | aea5d37 | 2008-01-26 20:12:59 +0100 | [diff] [blame] | 96 | * |
| 97 | * 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] | 98 | */ |
Bartlomiej Zolnierkiewicz | aea5d37 | 2008-01-26 20:12:59 +0100 | [diff] [blame] | 99 | |
Bartlomiej Zolnierkiewicz | 15ce926 | 2008-01-26 20:13:03 +0100 | [diff] [blame] | 100 | static void cs5520_dma_host_set(ide_drive_t *drive, int on) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | { |
Bartlomiej Zolnierkiewicz | 15ce926 | 2008-01-26 20:13:03 +0100 | [diff] [blame] | 102 | drive->vdma = on; |
| 103 | ide_dma_host_set(drive, on); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | } |
| 105 | |
Bartlomiej Zolnierkiewicz | ac95bee | 2008-04-26 22:25:14 +0200 | [diff] [blame] | 106 | static const struct ide_port_ops cs5520_port_ops = { |
| 107 | .set_pio_mode = cs5520_set_pio_mode, |
| 108 | .set_dma_mode = cs5520_set_dma_mode, |
| 109 | }; |
| 110 | |
Bartlomiej Zolnierkiewicz | f37afda | 2008-04-26 22:25:24 +0200 | [diff] [blame] | 111 | static const struct ide_dma_ops cs5520_dma_ops = { |
Bartlomiej Zolnierkiewicz | 5e37bdc | 2008-04-26 22:25:24 +0200 | [diff] [blame] | 112 | .dma_host_set = cs5520_dma_host_set, |
Bartlomiej Zolnierkiewicz | f37afda | 2008-04-26 22:25:24 +0200 | [diff] [blame] | 113 | .dma_setup = ide_dma_setup, |
| 114 | .dma_exec_cmd = ide_dma_exec_cmd, |
| 115 | .dma_start = ide_dma_start, |
| 116 | .dma_end = __ide_dma_end, |
| 117 | .dma_test_irq = ide_dma_test_irq, |
| 118 | .dma_lost_irq = ide_dma_lost_irq, |
| 119 | .dma_timeout = ide_dma_timeout, |
Bartlomiej Zolnierkiewicz | 5e37bdc | 2008-04-26 22:25:24 +0200 | [diff] [blame] | 120 | }; |
| 121 | |
Bartlomiej Zolnierkiewicz | cafa027 | 2008-05-14 23:06:16 +0200 | [diff] [blame] | 122 | /* FIXME: VDMA is disabled because it caused system hangs */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | #define DECLARE_CS_DEV(name_str) \ |
| 124 | { \ |
| 125 | .name = name_str, \ |
Bartlomiej Zolnierkiewicz | ac95bee | 2008-04-26 22:25:14 +0200 | [diff] [blame] | 126 | .port_ops = &cs5520_port_ops, \ |
Bartlomiej Zolnierkiewicz | 5e37bdc | 2008-04-26 22:25:24 +0200 | [diff] [blame] | 127 | .dma_ops = &cs5520_dma_ops, \ |
Bartlomiej Zolnierkiewicz | 0ae2e17 | 2007-10-16 22:29:55 +0200 | [diff] [blame] | 128 | .host_flags = IDE_HFLAG_ISA_PORTS | \ |
Bartlomiej Zolnierkiewicz | 9ffcf36 | 2007-10-19 00:30:07 +0200 | [diff] [blame] | 129 | IDE_HFLAG_CS5520 | \ |
Bartlomiej Zolnierkiewicz | 7cab14a | 2007-10-19 00:30:06 +0200 | [diff] [blame] | 130 | IDE_HFLAG_NO_ATAPI_DMA | \ |
Bartlomiej Zolnierkiewicz | 5e71d9c | 2008-04-26 17:36:35 +0200 | [diff] [blame] | 131 | IDE_HFLAG_ABUSE_SET_DMA_MODE, \ |
Bartlomiej Zolnierkiewicz | 4099d14 | 2007-07-20 01:11:59 +0200 | [diff] [blame] | 132 | .pio_mask = ATA_PIO4, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | } |
| 134 | |
Bartlomiej Zolnierkiewicz | 8562043 | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 135 | static const struct ide_port_info cyrix_chipsets[] __devinitdata = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | /* 0 */ DECLARE_CS_DEV("Cyrix 5510"), |
| 137 | /* 1 */ DECLARE_CS_DEV("Cyrix 5520") |
| 138 | }; |
| 139 | |
| 140 | /* |
| 141 | * The 5510/5520 are a bit weird. They don't quite set up the way |
| 142 | * the PCI helper layer expects so we must do much of the set up |
| 143 | * work longhand. |
| 144 | */ |
| 145 | |
| 146 | static int __devinit cs5520_init_one(struct pci_dev *dev, const struct pci_device_id *id) |
| 147 | { |
Bartlomiej Zolnierkiewicz | 8562043 | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 148 | const struct ide_port_info *d = &cyrix_chipsets[id->driver_data]; |
Bartlomiej Zolnierkiewicz | 8447d9d | 2007-10-20 00:32:31 +0200 | [diff] [blame] | 149 | u8 idx[4] = { 0xff, 0xff, 0xff, 0xff }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | |
| 151 | ide_setup_pci_noise(dev, d); |
| 152 | |
| 153 | /* We must not grab the entire device, it has 'ISA' space in its |
Benjamin Herrenschmidt | 0948391 | 2007-12-20 15:28:09 +1100 | [diff] [blame] | 154 | * BARS too and we will freak out other bits of the kernel |
Benjamin Herrenschmidt | 0948391 | 2007-12-20 15:28:09 +1100 | [diff] [blame] | 155 | */ |
| 156 | if (pci_enable_device_io(dev)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | printk(KERN_WARNING "%s: Unable to enable 55x0.\n", d->name); |
Amit Gud | 1e39dea | 2005-11-18 23:03:19 +0100 | [diff] [blame] | 158 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | } |
| 160 | pci_set_master(dev); |
| 161 | if (pci_set_dma_mask(dev, DMA_32BIT_MASK)) { |
| 162 | printk(KERN_WARNING "cs5520: No suitable DMA available.\n"); |
| 163 | return -ENODEV; |
| 164 | } |
| 165 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | /* |
| 167 | * Now the chipset is configured we can let the core |
| 168 | * do all the device setup for us |
| 169 | */ |
| 170 | |
Bartlomiej Zolnierkiewicz | 8447d9d | 2007-10-20 00:32:31 +0200 | [diff] [blame] | 171 | ide_pci_setup_ports(dev, d, 14, &idx[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | |
Bartlomiej Zolnierkiewicz | c413b9b | 2008-02-02 19:56:31 +0100 | [diff] [blame] | 173 | ide_device_add(idx, d); |
Bartlomiej Zolnierkiewicz | 5cbf79c | 2007-05-10 00:01:11 +0200 | [diff] [blame] | 174 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | return 0; |
| 176 | } |
| 177 | |
Bartlomiej Zolnierkiewicz | 9cbcc5e | 2007-10-16 22:29:56 +0200 | [diff] [blame] | 178 | static const struct pci_device_id cs5520_pci_tbl[] = { |
| 179 | { PCI_VDEVICE(CYRIX, PCI_DEVICE_ID_CYRIX_5510), 0 }, |
| 180 | { PCI_VDEVICE(CYRIX, PCI_DEVICE_ID_CYRIX_5520), 1 }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | { 0, }, |
| 182 | }; |
| 183 | MODULE_DEVICE_TABLE(pci, cs5520_pci_tbl); |
| 184 | |
| 185 | static struct pci_driver driver = { |
| 186 | .name = "Cyrix_IDE", |
| 187 | .id_table = cs5520_pci_tbl, |
| 188 | .probe = cs5520_init_one, |
| 189 | }; |
| 190 | |
Bartlomiej Zolnierkiewicz | 82ab1ee | 2007-01-27 13:46:56 +0100 | [diff] [blame] | 191 | static int __init cs5520_ide_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | { |
| 193 | return ide_pci_register_driver(&driver); |
| 194 | } |
| 195 | |
| 196 | module_init(cs5520_ide_init); |
| 197 | |
| 198 | MODULE_AUTHOR("Alan Cox"); |
| 199 | MODULE_DESCRIPTION("PCI driver module for Cyrix 5510/5520 IDE"); |
| 200 | MODULE_LICENSE("GPL"); |