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 * @ap: ATA port 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_port *ap, 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 pci_dev *pdev = to_pci_dev(ap->host->dev); 64 65 if (!pci_test_config_bits(pdev, &triflex_enable_bits[ap->port_no])) 66 return -ENOENT; 67 68 return ata_std_prereset(ap, deadline); 69} 70 71 72 73static void triflex_error_handler(struct ata_port *ap) 74{ 75 ata_bmdma_drive_eh(ap, triflex_prereset, ata_std_softreset, NULL, ata_std_postreset); 76} 77 78/** 79 * triflex_load_timing - timing configuration 80 * @ap: ATA interface 81 * @adev: Device on the bus 82 * @speed: speed to configure 83 * 84 * The Triflex has one set of timings per device per channel. This 85 * means we must do some switching. As the PIO and DMA timings don't 86 * match we have to do some reloading unlike PIIX devices where tuning 87 * tricks can avoid it. 88 */ 89 90static void triflex_load_timing(struct ata_port *ap, struct ata_device *adev, int speed) 91{ 92 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 93 u32 timing = 0; 94 u32 triflex_timing, old_triflex_timing; 95 int channel_offset = ap->port_no ? 0x74: 0x70; 96 unsigned int is_slave = (adev->devno != 0); 97 98 99 pci_read_config_dword(pdev, channel_offset, &old_triflex_timing); 100 triflex_timing = old_triflex_timing; 101 102 switch(speed) 103 { 104 case XFER_MW_DMA_2: 105 timing = 0x0103;break; 106 case XFER_MW_DMA_1: 107 timing = 0x0203;break; 108 case XFER_MW_DMA_0: 109 timing = 0x0808;break; 110 case XFER_SW_DMA_2: 111 case XFER_SW_DMA_1: 112 case XFER_SW_DMA_0: 113 timing = 0x0F0F;break; 114 case XFER_PIO_4: 115 timing = 0x0202;break; 116 case XFER_PIO_3: 117 timing = 0x0204;break; 118 case XFER_PIO_2: 119 timing = 0x0404;break; 120 case XFER_PIO_1: 121 timing = 0x0508;break; 122 case XFER_PIO_0: 123 timing = 0x0808;break; 124 default: 125 BUG(); 126 } 127 triflex_timing &= ~ (0xFFFF << (16 * is_slave)); 128 triflex_timing |= (timing << (16 * is_slave)); 129 130 if (triflex_timing != old_triflex_timing) 131 pci_write_config_dword(pdev, channel_offset, triflex_timing); 132} 133 134/** 135 * triflex_set_piomode - set initial PIO mode data 136 * @ap: ATA interface 137 * @adev: ATA device 138 * 139 * Use the timing loader to set up the PIO mode. We have to do this 140 * because DMA start/stop will only be called once DMA occurs. If there 141 * has been no DMA then the PIO timings are still needed. 142 */ 143static void triflex_set_piomode(struct ata_port *ap, struct ata_device *adev) 144{ 145 triflex_load_timing(ap, adev, adev->pio_mode); 146} 147 148/** 149 * triflex_dma_start - DMA start callback 150 * @qc: Command in progress 151 * 152 * Usually drivers set the DMA timing at the point the set_dmamode call 153 * is made. Triflex however requires we load new timings on the 154 * transition or keep matching PIO/DMA pairs (ie MWDMA2/PIO4 etc). 155 * We load the DMA timings just before starting DMA and then restore 156 * the PIO timing when the DMA is finished. 157 */ 158 159static void triflex_bmdma_start(struct ata_queued_cmd *qc) 160{ 161 triflex_load_timing(qc->ap, qc->dev, qc->dev->dma_mode); 162 ata_bmdma_start(qc); 163} 164 165/** 166 * triflex_dma_stop - DMA stop callback 167 * @ap: ATA interface 168 * @adev: ATA device 169 * 170 * We loaded new timings in dma_start, as a result we need to restore 171 * the PIO timings in dma_stop so that the next command issue gets the 172 * right clock values. 173 */ 174 175static void triflex_bmdma_stop(struct ata_queued_cmd *qc) 176{ 177 ata_bmdma_stop(qc); 178 triflex_load_timing(qc->ap, qc->dev, qc->dev->pio_mode); 179} 180 181static struct scsi_host_template triflex_sht = { 182 .module = THIS_MODULE, 183 .name = DRV_NAME, 184 .ioctl = ata_scsi_ioctl, 185 .queuecommand = ata_scsi_queuecmd, 186 .can_queue = ATA_DEF_QUEUE, 187 .this_id = ATA_SHT_THIS_ID, 188 .sg_tablesize = LIBATA_MAX_PRD, 189 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, 190 .emulated = ATA_SHT_EMULATED, 191 .use_clustering = ATA_SHT_USE_CLUSTERING, 192 .proc_name = DRV_NAME, 193 .dma_boundary = ATA_DMA_BOUNDARY, 194 .slave_configure = ata_scsi_slave_config, 195 .slave_destroy = ata_scsi_slave_destroy, 196 .bios_param = ata_std_bios_param, 197}; 198 199static struct ata_port_operations triflex_port_ops = { 200 .port_disable = ata_port_disable, 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 .irq_ack = ata_irq_ack, 230 231 .port_start = ata_port_start, 232}; 233 234static int triflex_init_one(struct pci_dev *dev, const struct pci_device_id *id) 235{ 236 static const struct ata_port_info info = { 237 .sht = &triflex_sht, 238 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, 239 .pio_mask = 0x1f, 240 .mwdma_mask = 0x07, 241 .port_ops = &triflex_port_ops 242 }; 243 const struct ata_port_info *ppi[] = { &info, NULL }; 244 static int printed_version; 245 246 if (!printed_version++) 247 dev_printk(KERN_DEBUG, &dev->dev, "version " DRV_VERSION "\n"); 248 249 return ata_pci_init_one(dev, ppi); 250} 251 252static const struct pci_device_id triflex[] = { 253 { PCI_VDEVICE(COMPAQ, PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE), }, 254 255 { }, 256}; 257 258static struct pci_driver triflex_pci_driver = { 259 .name = DRV_NAME, 260 .id_table = triflex, 261 .probe = triflex_init_one, 262 .remove = ata_pci_remove_one, 263#ifdef CONFIG_PM 264 .suspend = ata_pci_device_suspend, 265 .resume = ata_pci_device_resume, 266#endif 267}; 268 269static int __init triflex_init(void) 270{ 271 return pci_register_driver(&triflex_pci_driver); 272} 273 274static void __exit triflex_exit(void) 275{ 276 pci_unregister_driver(&triflex_pci_driver); 277} 278 279MODULE_AUTHOR("Alan Cox"); 280MODULE_DESCRIPTION("low-level driver for Compaq Triflex"); 281MODULE_LICENSE("GPL"); 282MODULE_DEVICE_TABLE(pci, triflex); 283MODULE_VERSION(DRV_VERSION); 284 285module_init(triflex_init); 286module_exit(triflex_exit); 287