1 /* 2 * pata_atiixp.c - ATI PATA for new ATA layer 3 * (C) 2005 Red Hat Inc 4 * 5 * Based on 6 * 7 * linux/drivers/ide/pci/atiixp.c Version 0.01-bart2 Feb. 26, 2004 8 * 9 * Copyright (C) 2003 ATI Inc. <hyu@ati.com> 10 * Copyright (C) 2004 Bartlomiej Zolnierkiewicz 11 * 12 */ 13 14 #include <linux/kernel.h> 15 #include <linux/module.h> 16 #include <linux/pci.h> 17 #include <linux/init.h> 18 #include <linux/blkdev.h> 19 #include <linux/delay.h> 20 #include <scsi/scsi_host.h> 21 #include <linux/libata.h> 22 23 #define DRV_NAME "pata_atiixp" 24 #define DRV_VERSION "0.4.6" 25 26 enum { 27 ATIIXP_IDE_PIO_TIMING = 0x40, 28 ATIIXP_IDE_MWDMA_TIMING = 0x44, 29 ATIIXP_IDE_PIO_CONTROL = 0x48, 30 ATIIXP_IDE_PIO_MODE = 0x4a, 31 ATIIXP_IDE_UDMA_CONTROL = 0x54, 32 ATIIXP_IDE_UDMA_MODE = 0x56 33 }; 34 35 static int atiixp_pre_reset(struct ata_link *link, unsigned long deadline) 36 { 37 struct ata_port *ap = link->ap; 38 static const struct pci_bits atiixp_enable_bits[] = { 39 { 0x48, 1, 0x01, 0x00 }, 40 { 0x48, 1, 0x08, 0x00 } 41 }; 42 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 43 44 if (!pci_test_config_bits(pdev, &atiixp_enable_bits[ap->port_no])) 45 return -ENOENT; 46 47 return ata_sff_prereset(link, deadline); 48 } 49 50 static int atiixp_cable_detect(struct ata_port *ap) 51 { 52 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 53 u8 udma; 54 55 /* Hack from drivers/ide/pci. Really we want to know how to do the 56 raw detection not play follow the bios mode guess */ 57 pci_read_config_byte(pdev, ATIIXP_IDE_UDMA_MODE + ap->port_no, &udma); 58 if ((udma & 0x07) >= 0x04 || (udma & 0x70) >= 0x40) 59 return ATA_CBL_PATA80; 60 return ATA_CBL_PATA40; 61 } 62 63 /** 64 * atiixp_set_pio_timing - set initial PIO mode data 65 * @ap: ATA interface 66 * @adev: ATA device 67 * 68 * Called by both the pio and dma setup functions to set the controller 69 * timings for PIO transfers. We must load both the mode number and 70 * timing values into the controller. 71 */ 72 73 static void atiixp_set_pio_timing(struct ata_port *ap, struct ata_device *adev, int pio) 74 { 75 static u8 pio_timings[5] = { 0x5D, 0x47, 0x34, 0x22, 0x20 }; 76 77 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 78 int dn = 2 * ap->port_no + adev->devno; 79 80 /* Check this is correct - the order is odd in both drivers */ 81 int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1); 82 u16 pio_mode_data, pio_timing_data; 83 84 pci_read_config_word(pdev, ATIIXP_IDE_PIO_MODE, &pio_mode_data); 85 pio_mode_data &= ~(0x7 << (4 * dn)); 86 pio_mode_data |= pio << (4 * dn); 87 pci_write_config_word(pdev, ATIIXP_IDE_PIO_MODE, pio_mode_data); 88 89 pci_read_config_word(pdev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data); 90 pio_timing_data &= ~(0xFF << timing_shift); 91 pio_timing_data |= (pio_timings[pio] << timing_shift); 92 pci_write_config_word(pdev, ATIIXP_IDE_PIO_TIMING, pio_timing_data); 93 } 94 95 /** 96 * atiixp_set_piomode - set initial PIO mode data 97 * @ap: ATA interface 98 * @adev: ATA device 99 * 100 * Called to do the PIO mode setup. We use a shared helper for this 101 * as the DMA setup must also adjust the PIO timing information. 102 */ 103 104 static void atiixp_set_piomode(struct ata_port *ap, struct ata_device *adev) 105 { 106 atiixp_set_pio_timing(ap, adev, adev->pio_mode - XFER_PIO_0); 107 } 108 109 /** 110 * atiixp_set_dmamode - set initial DMA mode data 111 * @ap: ATA interface 112 * @adev: ATA device 113 * 114 * Called to do the DMA mode setup. We use timing tables for most 115 * modes but must tune an appropriate PIO mode to match. 116 */ 117 118 static void atiixp_set_dmamode(struct ata_port *ap, struct ata_device *adev) 119 { 120 static u8 mwdma_timings[5] = { 0x77, 0x21, 0x20 }; 121 122 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 123 int dma = adev->dma_mode; 124 int dn = 2 * ap->port_no + adev->devno; 125 int wanted_pio; 126 127 if (adev->dma_mode >= XFER_UDMA_0) { 128 u16 udma_mode_data; 129 130 dma -= XFER_UDMA_0; 131 132 pci_read_config_word(pdev, ATIIXP_IDE_UDMA_MODE, &udma_mode_data); 133 udma_mode_data &= ~(0x7 << (4 * dn)); 134 udma_mode_data |= dma << (4 * dn); 135 pci_write_config_word(pdev, ATIIXP_IDE_UDMA_MODE, udma_mode_data); 136 } else { 137 u16 mwdma_timing_data; 138 /* Check this is correct - the order is odd in both drivers */ 139 int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1); 140 141 dma -= XFER_MW_DMA_0; 142 143 pci_read_config_word(pdev, ATIIXP_IDE_MWDMA_TIMING, &mwdma_timing_data); 144 mwdma_timing_data &= ~(0xFF << timing_shift); 145 mwdma_timing_data |= (mwdma_timings[dma] << timing_shift); 146 pci_write_config_word(pdev, ATIIXP_IDE_MWDMA_TIMING, mwdma_timing_data); 147 } 148 /* 149 * We must now look at the PIO mode situation. We may need to 150 * adjust the PIO mode to keep the timings acceptable 151 */ 152 if (adev->dma_mode >= XFER_MW_DMA_2) 153 wanted_pio = 4; 154 else if (adev->dma_mode == XFER_MW_DMA_1) 155 wanted_pio = 3; 156 else if (adev->dma_mode == XFER_MW_DMA_0) 157 wanted_pio = 0; 158 else BUG(); 159 160 if (adev->pio_mode != wanted_pio) 161 atiixp_set_pio_timing(ap, adev, wanted_pio); 162 } 163 164 /** 165 * atiixp_bmdma_start - DMA start callback 166 * @qc: Command in progress 167 * 168 * When DMA begins we need to ensure that the UDMA control 169 * register for the channel is correctly set. 170 * 171 * Note: The host lock held by the libata layer protects 172 * us from two channels both trying to set DMA bits at once 173 */ 174 175 static void atiixp_bmdma_start(struct ata_queued_cmd *qc) 176 { 177 struct ata_port *ap = qc->ap; 178 struct ata_device *adev = qc->dev; 179 180 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 181 int dn = (2 * ap->port_no) + adev->devno; 182 u16 tmp16; 183 184 pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16); 185 if (ata_using_udma(adev)) 186 tmp16 |= (1 << dn); 187 else 188 tmp16 &= ~(1 << dn); 189 pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16); 190 ata_bmdma_start(qc); 191 } 192 193 /** 194 * atiixp_dma_stop - DMA stop callback 195 * @qc: Command in progress 196 * 197 * DMA has completed. Clear the UDMA flag as the next operations will 198 * be PIO ones not UDMA data transfer. 199 * 200 * Note: The host lock held by the libata layer protects 201 * us from two channels both trying to set DMA bits at once 202 */ 203 204 static void atiixp_bmdma_stop(struct ata_queued_cmd *qc) 205 { 206 struct ata_port *ap = qc->ap; 207 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 208 int dn = (2 * ap->port_no) + qc->dev->devno; 209 u16 tmp16; 210 211 pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16); 212 tmp16 &= ~(1 << dn); 213 pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16); 214 ata_bmdma_stop(qc); 215 } 216 217 static struct scsi_host_template atiixp_sht = { 218 ATA_BMDMA_SHT(DRV_NAME), 219 .sg_tablesize = LIBATA_DUMB_MAX_PRD, 220 }; 221 222 static struct ata_port_operations atiixp_port_ops = { 223 .inherits = &ata_bmdma_port_ops, 224 225 .qc_prep = ata_sff_dumb_qc_prep, 226 .bmdma_start = atiixp_bmdma_start, 227 .bmdma_stop = atiixp_bmdma_stop, 228 229 .cable_detect = atiixp_cable_detect, 230 .set_piomode = atiixp_set_piomode, 231 .set_dmamode = atiixp_set_dmamode, 232 .prereset = atiixp_pre_reset, 233 }; 234 235 static int atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id) 236 { 237 static const struct ata_port_info info = { 238 .flags = ATA_FLAG_SLAVE_POSS, 239 .pio_mask = 0x1f, 240 .mwdma_mask = 0x06, /* No MWDMA0 support */ 241 .udma_mask = 0x3F, 242 .port_ops = &atiixp_port_ops 243 }; 244 const struct ata_port_info *ppi[] = { &info, NULL }; 245 return ata_pci_sff_init_one(dev, ppi, &atiixp_sht, NULL); 246 } 247 248 static const struct pci_device_id atiixp[] = { 249 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP200_IDE), }, 250 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP300_IDE), }, 251 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP400_IDE), }, 252 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP600_IDE), }, 253 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP700_IDE), }, 254 255 { }, 256 }; 257 258 static struct pci_driver atiixp_pci_driver = { 259 .name = DRV_NAME, 260 .id_table = atiixp, 261 .probe = atiixp_init_one, 262 .remove = ata_pci_remove_one, 263 #ifdef CONFIG_PM 264 .resume = ata_pci_device_resume, 265 .suspend = ata_pci_device_suspend, 266 #endif 267 }; 268 269 static int __init atiixp_init(void) 270 { 271 return pci_register_driver(&atiixp_pci_driver); 272 } 273 274 275 static void __exit atiixp_exit(void) 276 { 277 pci_unregister_driver(&atiixp_pci_driver); 278 } 279 280 MODULE_AUTHOR("Alan Cox"); 281 MODULE_DESCRIPTION("low-level driver for ATI IXP200/300/400"); 282 MODULE_LICENSE("GPL"); 283 MODULE_DEVICE_TABLE(pci, atiixp); 284 MODULE_VERSION(DRV_VERSION); 285 286 module_init(atiixp_init); 287 module_exit(atiixp_exit); 288