1 /* 2 * pata_triflex.c - Compaq PATA for new ATA layer 3 * (C) 2005 Red Hat Inc 4 * Alan Cox <alan@redhat.com> 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 56 static 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_std_prereset(link, deadline); 70 } 71 72 73 74 static void triflex_error_handler(struct ata_port *ap) 75 { 76 ata_bmdma_drive_eh(ap, triflex_prereset, ata_std_softreset, NULL, ata_std_postreset); 77 } 78 79 /** 80 * triflex_load_timing - timing configuration 81 * @ap: ATA interface 82 * @adev: Device on the bus 83 * @speed: speed to configure 84 * 85 * The Triflex has one set of timings per device per channel. This 86 * means we must do some switching. As the PIO and DMA timings don't 87 * match we have to do some reloading unlike PIIX devices where tuning 88 * tricks can avoid it. 89 */ 90 91 static void triflex_load_timing(struct ata_port *ap, struct ata_device *adev, int speed) 92 { 93 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 94 u32 timing = 0; 95 u32 triflex_timing, old_triflex_timing; 96 int channel_offset = ap->port_no ? 0x74: 0x70; 97 unsigned int is_slave = (adev->devno != 0); 98 99 100 pci_read_config_dword(pdev, channel_offset, &old_triflex_timing); 101 triflex_timing = old_triflex_timing; 102 103 switch(speed) 104 { 105 case XFER_MW_DMA_2: 106 timing = 0x0103;break; 107 case XFER_MW_DMA_1: 108 timing = 0x0203;break; 109 case XFER_MW_DMA_0: 110 timing = 0x0808;break; 111 case XFER_SW_DMA_2: 112 case XFER_SW_DMA_1: 113 case XFER_SW_DMA_0: 114 timing = 0x0F0F;break; 115 case XFER_PIO_4: 116 timing = 0x0202;break; 117 case XFER_PIO_3: 118 timing = 0x0204;break; 119 case XFER_PIO_2: 120 timing = 0x0404;break; 121 case XFER_PIO_1: 122 timing = 0x0508;break; 123 case XFER_PIO_0: 124 timing = 0x0808;break; 125 default: 126 BUG(); 127 } 128 triflex_timing &= ~ (0xFFFF << (16 * is_slave)); 129 triflex_timing |= (timing << (16 * is_slave)); 130 131 if (triflex_timing != old_triflex_timing) 132 pci_write_config_dword(pdev, channel_offset, triflex_timing); 133 } 134 135 /** 136 * triflex_set_piomode - set initial PIO mode data 137 * @ap: ATA interface 138 * @adev: ATA device 139 * 140 * Use the timing loader to set up the PIO mode. We have to do this 141 * because DMA start/stop will only be called once DMA occurs. If there 142 * has been no DMA then the PIO timings are still needed. 143 */ 144 static void triflex_set_piomode(struct ata_port *ap, struct ata_device *adev) 145 { 146 triflex_load_timing(ap, adev, adev->pio_mode); 147 } 148 149 /** 150 * triflex_dma_start - DMA start callback 151 * @qc: Command in progress 152 * 153 * Usually drivers set the DMA timing at the point the set_dmamode call 154 * is made. Triflex however requires we load new timings on the 155 * transition or keep matching PIO/DMA pairs (ie MWDMA2/PIO4 etc). 156 * We load the DMA timings just before starting DMA and then restore 157 * the PIO timing when the DMA is finished. 158 */ 159 160 static void triflex_bmdma_start(struct ata_queued_cmd *qc) 161 { 162 triflex_load_timing(qc->ap, qc->dev, qc->dev->dma_mode); 163 ata_bmdma_start(qc); 164 } 165 166 /** 167 * triflex_dma_stop - DMA stop callback 168 * @ap: ATA interface 169 * @adev: ATA device 170 * 171 * We loaded new timings in dma_start, as a result we need to restore 172 * the PIO timings in dma_stop so that the next command issue gets the 173 * right clock values. 174 */ 175 176 static void triflex_bmdma_stop(struct ata_queued_cmd *qc) 177 { 178 ata_bmdma_stop(qc); 179 triflex_load_timing(qc->ap, qc->dev, qc->dev->pio_mode); 180 } 181 182 static struct scsi_host_template triflex_sht = { 183 .module = THIS_MODULE, 184 .name = DRV_NAME, 185 .ioctl = ata_scsi_ioctl, 186 .queuecommand = ata_scsi_queuecmd, 187 .can_queue = ATA_DEF_QUEUE, 188 .this_id = ATA_SHT_THIS_ID, 189 .sg_tablesize = LIBATA_MAX_PRD, 190 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, 191 .emulated = ATA_SHT_EMULATED, 192 .use_clustering = ATA_SHT_USE_CLUSTERING, 193 .proc_name = DRV_NAME, 194 .dma_boundary = ATA_DMA_BOUNDARY, 195 .slave_configure = ata_scsi_slave_config, 196 .slave_destroy = ata_scsi_slave_destroy, 197 .bios_param = ata_std_bios_param, 198 }; 199 200 static struct ata_port_operations triflex_port_ops = { 201 .set_piomode = triflex_set_piomode, 202 .mode_filter = ata_pci_default_filter, 203 204 .tf_load = ata_tf_load, 205 .tf_read = ata_tf_read, 206 .check_status = ata_check_status, 207 .exec_command = ata_exec_command, 208 .dev_select = ata_std_dev_select, 209 210 .freeze = ata_bmdma_freeze, 211 .thaw = ata_bmdma_thaw, 212 .error_handler = triflex_error_handler, 213 .post_internal_cmd = ata_bmdma_post_internal_cmd, 214 .cable_detect = ata_cable_40wire, 215 216 .bmdma_setup = ata_bmdma_setup, 217 .bmdma_start = triflex_bmdma_start, 218 .bmdma_stop = triflex_bmdma_stop, 219 .bmdma_status = ata_bmdma_status, 220 221 .qc_prep = ata_qc_prep, 222 .qc_issue = ata_qc_issue_prot, 223 224 .data_xfer = ata_data_xfer, 225 226 .irq_handler = ata_interrupt, 227 .irq_clear = ata_bmdma_irq_clear, 228 .irq_on = ata_irq_on, 229 230 .port_start = ata_sff_port_start, 231 }; 232 233 static int triflex_init_one(struct pci_dev *dev, const struct pci_device_id *id) 234 { 235 static const struct ata_port_info info = { 236 .sht = &triflex_sht, 237 .flags = ATA_FLAG_SLAVE_POSS, 238 .pio_mask = 0x1f, 239 .mwdma_mask = 0x07, 240 .port_ops = &triflex_port_ops 241 }; 242 const struct ata_port_info *ppi[] = { &info, NULL }; 243 static int printed_version; 244 245 if (!printed_version++) 246 dev_printk(KERN_DEBUG, &dev->dev, "version " DRV_VERSION "\n"); 247 248 return ata_pci_init_one(dev, ppi); 249 } 250 251 static const struct pci_device_id triflex[] = { 252 { PCI_VDEVICE(COMPAQ, PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE), }, 253 254 { }, 255 }; 256 257 static struct pci_driver triflex_pci_driver = { 258 .name = DRV_NAME, 259 .id_table = triflex, 260 .probe = triflex_init_one, 261 .remove = ata_pci_remove_one, 262 #ifdef CONFIG_PM 263 .suspend = ata_pci_device_suspend, 264 .resume = ata_pci_device_resume, 265 #endif 266 }; 267 268 static int __init triflex_init(void) 269 { 270 return pci_register_driver(&triflex_pci_driver); 271 } 272 273 static void __exit triflex_exit(void) 274 { 275 pci_unregister_driver(&triflex_pci_driver); 276 } 277 278 MODULE_AUTHOR("Alan Cox"); 279 MODULE_DESCRIPTION("low-level driver for Compaq Triflex"); 280 MODULE_LICENSE("GPL"); 281 MODULE_DEVICE_TABLE(pci, triflex); 282 MODULE_VERSION(DRV_VERSION); 283 284 module_init(triflex_init); 285 module_exit(triflex_exit); 286