1/* 2 * pata_triflex.c - Compaq PATA for new ATA layer 3 * (C) 2005 Red Hat Inc 4 * Alan Cox <alan@lxorguk.ukuu.org.uk> 5 * 6 * based upon 7 * 8 * triflex.c 9 * 10 * IDE Chipset driver for the Compaq TriFlex IDE controller. 11 * 12 * Known to work with the Compaq Workstation 5x00 series. 13 * 14 * Copyright (C) 2002 Hewlett-Packard Development Group, L.P. 15 * Author: Torben Mathiasen <torben.mathiasen@hp.com> 16 * 17 * This program is free software; you can redistribute it and/or modify 18 * it under the terms of the GNU General Public License version 2 as 19 * published by the Free Software Foundation. 20 * 21 * This program is distributed in the hope that it will be useful, 22 * but WITHOUT ANY WARRANTY; without even the implied warranty of 23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 24 * GNU General Public License for more details. 25 * 26 * You should have received a copy of the GNU General Public License 27 * along with this program; if not, write to the Free Software 28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 29 * 30 * Loosely based on the piix & svwks drivers. 31 * 32 * Documentation: 33 * Not publically available. 34 */ 35 36#include <linux/kernel.h> 37#include <linux/module.h> 38#include <linux/pci.h> 39#include <linux/init.h> 40#include <linux/blkdev.h> 41#include <linux/delay.h> 42#include <scsi/scsi_host.h> 43#include <linux/libata.h> 44 45#define DRV_NAME "pata_triflex" 46#define DRV_VERSION "0.2.8" 47 48/** 49 * triflex_prereset - probe begin 50 * @link: ATA link 51 * @deadline: deadline jiffies for the operation 52 * 53 * Set up cable type and use generic probe init 54 */ 55 56static int triflex_prereset(struct ata_link *link, unsigned long deadline) 57{ 58 static const struct pci_bits triflex_enable_bits[] = { 59 { 0x80, 1, 0x01, 0x01 }, 60 { 0x80, 1, 0x02, 0x02 } 61 }; 62 63 struct ata_port *ap = link->ap; 64 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 65 66 if (!pci_test_config_bits(pdev, &triflex_enable_bits[ap->port_no])) 67 return -ENOENT; 68 69 return ata_sff_prereset(link, deadline); 70} 71 72 73 74/** 75 * triflex_load_timing - timing configuration 76 * @ap: ATA interface 77 * @adev: Device on the bus 78 * @speed: speed to configure 79 * 80 * The Triflex has one set of timings per device per channel. This 81 * means we must do some switching. As the PIO and DMA timings don't 82 * match we have to do some reloading unlike PIIX devices where tuning 83 * tricks can avoid it. 84 */ 85 86static void triflex_load_timing(struct ata_port *ap, struct ata_device *adev, int speed) 87{ 88 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 89 u32 timing = 0; 90 u32 triflex_timing, old_triflex_timing; 91 int channel_offset = ap->port_no ? 0x74: 0x70; 92 unsigned int is_slave = (adev->devno != 0); 93 94 95 pci_read_config_dword(pdev, channel_offset, &old_triflex_timing); 96 triflex_timing = old_triflex_timing; 97 98 switch(speed) 99 { 100 case XFER_MW_DMA_2: 101 timing = 0x0103;break; 102 case XFER_MW_DMA_1: 103 timing = 0x0203;break; 104 case XFER_MW_DMA_0: 105 timing = 0x0808;break; 106 case XFER_SW_DMA_2: 107 case XFER_SW_DMA_1: 108 case XFER_SW_DMA_0: 109 timing = 0x0F0F;break; 110 case XFER_PIO_4: 111 timing = 0x0202;break; 112 case XFER_PIO_3: 113 timing = 0x0204;break; 114 case XFER_PIO_2: 115 timing = 0x0404;break; 116 case XFER_PIO_1: 117 timing = 0x0508;break; 118 case XFER_PIO_0: 119 timing = 0x0808;break; 120 default: 121 BUG(); 122 } 123 triflex_timing &= ~ (0xFFFF << (16 * is_slave)); 124 triflex_timing |= (timing << (16 * is_slave)); 125 126 if (triflex_timing != old_triflex_timing) 127 pci_write_config_dword(pdev, channel_offset, triflex_timing); 128} 129 130/** 131 * triflex_set_piomode - set initial PIO mode data 132 * @ap: ATA interface 133 * @adev: ATA device 134 * 135 * Use the timing loader to set up the PIO mode. We have to do this 136 * because DMA start/stop will only be called once DMA occurs. If there 137 * has been no DMA then the PIO timings are still needed. 138 */ 139static void triflex_set_piomode(struct ata_port *ap, struct ata_device *adev) 140{ 141 triflex_load_timing(ap, adev, adev->pio_mode); 142} 143 144/** 145 * triflex_dma_start - DMA start callback 146 * @qc: Command in progress 147 * 148 * Usually drivers set the DMA timing at the point the set_dmamode call 149 * is made. Triflex however requires we load new timings on the 150 * transition or keep matching PIO/DMA pairs (ie MWDMA2/PIO4 etc). 151 * We load the DMA timings just before starting DMA and then restore 152 * the PIO timing when the DMA is finished. 153 */ 154 155static void triflex_bmdma_start(struct ata_queued_cmd *qc) 156{ 157 triflex_load_timing(qc->ap, qc->dev, qc->dev->dma_mode); 158 ata_bmdma_start(qc); 159} 160 161/** 162 * triflex_dma_stop - DMA stop callback 163 * @ap: ATA interface 164 * @adev: ATA device 165 * 166 * We loaded new timings in dma_start, as a result we need to restore 167 * the PIO timings in dma_stop so that the next command issue gets the 168 * right clock values. 169 */ 170 171static void triflex_bmdma_stop(struct ata_queued_cmd *qc) 172{ 173 ata_bmdma_stop(qc); 174 triflex_load_timing(qc->ap, qc->dev, qc->dev->pio_mode); 175} 176 177static struct scsi_host_template triflex_sht = { 178 ATA_BMDMA_SHT(DRV_NAME), 179}; 180 181static struct ata_port_operations triflex_port_ops = { 182 .inherits = &ata_bmdma_port_ops, 183 .bmdma_start = triflex_bmdma_start, 184 .bmdma_stop = triflex_bmdma_stop, 185 .cable_detect = ata_cable_40wire, 186 .set_piomode = triflex_set_piomode, 187 .prereset = triflex_prereset, 188}; 189 190static int triflex_init_one(struct pci_dev *dev, const struct pci_device_id *id) 191{ 192 static const struct ata_port_info info = { 193 .flags = ATA_FLAG_SLAVE_POSS, 194 .pio_mask = ATA_PIO4, 195 .mwdma_mask = ATA_MWDMA2, 196 .port_ops = &triflex_port_ops 197 }; 198 const struct ata_port_info *ppi[] = { &info, NULL }; 199 static int printed_version; 200 201 if (!printed_version++) 202 dev_printk(KERN_DEBUG, &dev->dev, "version " DRV_VERSION "\n"); 203 204 return ata_pci_bmdma_init_one(dev, ppi, &triflex_sht, NULL, 0); 205} 206 207static const struct pci_device_id triflex[] = { 208 { PCI_VDEVICE(COMPAQ, PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE), }, 209 210 { }, 211}; 212 213static struct pci_driver triflex_pci_driver = { 214 .name = DRV_NAME, 215 .id_table = triflex, 216 .probe = triflex_init_one, 217 .remove = ata_pci_remove_one, 218#ifdef CONFIG_PM 219 .suspend = ata_pci_device_suspend, 220 .resume = ata_pci_device_resume, 221#endif 222}; 223 224static int __init triflex_init(void) 225{ 226 return pci_register_driver(&triflex_pci_driver); 227} 228 229static void __exit triflex_exit(void) 230{ 231 pci_unregister_driver(&triflex_pci_driver); 232} 233 234MODULE_AUTHOR("Alan Cox"); 235MODULE_DESCRIPTION("low-level driver for Compaq Triflex"); 236MODULE_LICENSE("GPL"); 237MODULE_DEVICE_TABLE(pci, triflex); 238MODULE_VERSION(DRV_VERSION); 239 240module_init(triflex_init); 241module_exit(triflex_exit); 242