1 /* 2 * pata_atiixp.c - ATI PATA for new ATA layer 3 * (C) 2005 Red Hat Inc 4 * Alan Cox <alan@redhat.com> 5 * 6 * Based on 7 * 8 * linux/drivers/ide/pci/atiixp.c Version 0.01-bart2 Feb. 26, 2004 9 * 10 * Copyright (C) 2003 ATI Inc. <hyu@ati.com> 11 * Copyright (C) 2004 Bartlomiej Zolnierkiewicz 12 * 13 */ 14 15 #include <linux/kernel.h> 16 #include <linux/module.h> 17 #include <linux/pci.h> 18 #include <linux/init.h> 19 #include <linux/blkdev.h> 20 #include <linux/delay.h> 21 #include <scsi/scsi_host.h> 22 #include <linux/libata.h> 23 24 #define DRV_NAME "pata_atiixp" 25 #define DRV_VERSION "0.4.6" 26 27 enum { 28 ATIIXP_IDE_PIO_TIMING = 0x40, 29 ATIIXP_IDE_MWDMA_TIMING = 0x44, 30 ATIIXP_IDE_PIO_CONTROL = 0x48, 31 ATIIXP_IDE_PIO_MODE = 0x4a, 32 ATIIXP_IDE_UDMA_CONTROL = 0x54, 33 ATIIXP_IDE_UDMA_MODE = 0x56 34 }; 35 36 static int atiixp_pre_reset(struct ata_link *link, unsigned long deadline) 37 { 38 struct ata_port *ap = link->ap; 39 static const struct pci_bits atiixp_enable_bits[] = { 40 { 0x48, 1, 0x01, 0x00 }, 41 { 0x48, 1, 0x08, 0x00 } 42 }; 43 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 44 45 if (!pci_test_config_bits(pdev, &atiixp_enable_bits[ap->port_no])) 46 return -ENOENT; 47 48 return ata_sff_prereset(link, deadline); 49 } 50 51 static int atiixp_cable_detect(struct ata_port *ap) 52 { 53 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 54 u8 udma; 55 56 /* Hack from drivers/ide/pci. Really we want to know how to do the 57 raw detection not play follow the bios mode guess */ 58 pci_read_config_byte(pdev, ATIIXP_IDE_UDMA_MODE + ap->port_no, &udma); 59 if ((udma & 0x07) >= 0x04 || (udma & 0x70) >= 0x40) 60 return ATA_CBL_PATA80; 61 return ATA_CBL_PATA40; 62 } 63 64 /** 65 * atiixp_set_pio_timing - set initial PIO mode data 66 * @ap: ATA interface 67 * @adev: ATA device 68 * 69 * Called by both the pio and dma setup functions to set the controller 70 * timings for PIO transfers. We must load both the mode number and 71 * timing values into the controller. 72 */ 73 74 static void atiixp_set_pio_timing(struct ata_port *ap, struct ata_device *adev, int pio) 75 { 76 static u8 pio_timings[5] = { 0x5D, 0x47, 0x34, 0x22, 0x20 }; 77 78 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 79 int dn = 2 * ap->port_no + adev->devno; 80 81 /* Check this is correct - the order is odd in both drivers */ 82 int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1); 83 u16 pio_mode_data, pio_timing_data; 84 85 pci_read_config_word(pdev, ATIIXP_IDE_PIO_MODE, &pio_mode_data); 86 pio_mode_data &= ~(0x7 << (4 * dn)); 87 pio_mode_data |= pio << (4 * dn); 88 pci_write_config_word(pdev, ATIIXP_IDE_PIO_MODE, pio_mode_data); 89 90 pci_read_config_word(pdev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data); 91 pio_mode_data &= ~(0xFF << timing_shift); 92 pio_mode_data |= (pio_timings[pio] << timing_shift); 93 pci_write_config_word(pdev, ATIIXP_IDE_PIO_TIMING, pio_timing_data); 94 } 95 96 /** 97 * atiixp_set_piomode - set initial PIO mode data 98 * @ap: ATA interface 99 * @adev: ATA device 100 * 101 * Called to do the PIO mode setup. We use a shared helper for this 102 * as the DMA setup must also adjust the PIO timing information. 103 */ 104 105 static void atiixp_set_piomode(struct ata_port *ap, struct ata_device *adev) 106 { 107 atiixp_set_pio_timing(ap, adev, adev->pio_mode - XFER_PIO_0); 108 } 109 110 /** 111 * atiixp_set_dmamode - set initial DMA mode data 112 * @ap: ATA interface 113 * @adev: ATA device 114 * 115 * Called to do the DMA mode setup. We use timing tables for most 116 * modes but must tune an appropriate PIO mode to match. 117 */ 118 119 static void atiixp_set_dmamode(struct ata_port *ap, struct ata_device *adev) 120 { 121 static u8 mwdma_timings[5] = { 0x77, 0x21, 0x20 }; 122 123 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 124 int dma = adev->dma_mode; 125 int dn = 2 * ap->port_no + adev->devno; 126 int wanted_pio; 127 128 if (adev->dma_mode >= XFER_UDMA_0) { 129 u16 udma_mode_data; 130 131 dma -= XFER_UDMA_0; 132 133 pci_read_config_word(pdev, ATIIXP_IDE_UDMA_MODE, &udma_mode_data); 134 udma_mode_data &= ~(0x7 << (4 * dn)); 135 udma_mode_data |= dma << (4 * dn); 136 pci_write_config_word(pdev, ATIIXP_IDE_UDMA_MODE, udma_mode_data); 137 } else { 138 u16 mwdma_timing_data; 139 /* Check this is correct - the order is odd in both drivers */ 140 int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1); 141 142 dma -= XFER_MW_DMA_0; 143 144 pci_read_config_word(pdev, ATIIXP_IDE_MWDMA_TIMING, &mwdma_timing_data); 145 mwdma_timing_data &= ~(0xFF << timing_shift); 146 mwdma_timing_data |= (mwdma_timings[dma] << timing_shift); 147 pci_write_config_word(pdev, ATIIXP_IDE_MWDMA_TIMING, mwdma_timing_data); 148 } 149 /* 150 * We must now look at the PIO mode situation. We may need to 151 * adjust the PIO mode to keep the timings acceptable 152 */ 153 if (adev->dma_mode >= XFER_MW_DMA_2) 154 wanted_pio = 4; 155 else if (adev->dma_mode == XFER_MW_DMA_1) 156 wanted_pio = 3; 157 else if (adev->dma_mode == XFER_MW_DMA_0) 158 wanted_pio = 0; 159 else BUG(); 160 161 if (adev->pio_mode != wanted_pio) 162 atiixp_set_pio_timing(ap, adev, wanted_pio); 163 } 164 165 /** 166 * atiixp_bmdma_start - DMA start callback 167 * @qc: Command in progress 168 * 169 * When DMA begins we need to ensure that the UDMA control 170 * register for the channel is correctly set. 171 * 172 * Note: The host lock held by the libata layer protects 173 * us from two channels both trying to set DMA bits at once 174 */ 175 176 static void atiixp_bmdma_start(struct ata_queued_cmd *qc) 177 { 178 struct ata_port *ap = qc->ap; 179 struct ata_device *adev = qc->dev; 180 181 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 182 int dn = (2 * ap->port_no) + adev->devno; 183 u16 tmp16; 184 185 pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16); 186 if (adev->dma_mode >= XFER_UDMA_0) 187 tmp16 |= (1 << dn); 188 else 189 tmp16 &= ~(1 << dn); 190 pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16); 191 ata_bmdma_start(qc); 192 } 193 194 /** 195 * atiixp_dma_stop - DMA stop callback 196 * @qc: Command in progress 197 * 198 * DMA has completed. Clear the UDMA flag as the next operations will 199 * be PIO ones not UDMA data transfer. 200 * 201 * Note: The host lock held by the libata layer protects 202 * us from two channels both trying to set DMA bits at once 203 */ 204 205 static void atiixp_bmdma_stop(struct ata_queued_cmd *qc) 206 { 207 struct ata_port *ap = qc->ap; 208 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 209 int dn = (2 * ap->port_no) + qc->dev->devno; 210 u16 tmp16; 211 212 pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16); 213 tmp16 &= ~(1 << dn); 214 pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16); 215 ata_bmdma_stop(qc); 216 } 217 218 static struct scsi_host_template atiixp_sht = { 219 ATA_BMDMA_SHT(DRV_NAME), 220 .sg_tablesize = LIBATA_DUMB_MAX_PRD, 221 }; 222 223 static struct ata_port_operations atiixp_port_ops = { 224 .inherits = &ata_bmdma_port_ops, 225 226 .qc_prep = ata_sff_dumb_qc_prep, 227 .bmdma_start = atiixp_bmdma_start, 228 .bmdma_stop = atiixp_bmdma_stop, 229 230 .cable_detect = atiixp_cable_detect, 231 .set_piomode = atiixp_set_piomode, 232 .set_dmamode = atiixp_set_dmamode, 233 .prereset = atiixp_pre_reset, 234 }; 235 236 static int atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id) 237 { 238 static const struct ata_port_info info = { 239 .flags = ATA_FLAG_SLAVE_POSS, 240 .pio_mask = 0x1f, 241 .mwdma_mask = 0x06, /* No MWDMA0 support */ 242 .udma_mask = 0x3F, 243 .port_ops = &atiixp_port_ops 244 }; 245 const struct ata_port_info *ppi[] = { &info, NULL }; 246 return ata_pci_sff_init_one(dev, ppi, &atiixp_sht, NULL); 247 } 248 249 static const struct pci_device_id atiixp[] = { 250 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP200_IDE), }, 251 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP300_IDE), }, 252 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP400_IDE), }, 253 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP600_IDE), }, 254 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP700_IDE), }, 255 256 { }, 257 }; 258 259 static struct pci_driver atiixp_pci_driver = { 260 .name = DRV_NAME, 261 .id_table = atiixp, 262 .probe = atiixp_init_one, 263 .remove = ata_pci_remove_one, 264 #ifdef CONFIG_PM 265 .resume = ata_pci_device_resume, 266 .suspend = ata_pci_device_suspend, 267 #endif 268 }; 269 270 static int __init atiixp_init(void) 271 { 272 return pci_register_driver(&atiixp_pci_driver); 273 } 274 275 276 static void __exit atiixp_exit(void) 277 { 278 pci_unregister_driver(&atiixp_pci_driver); 279 } 280 281 MODULE_AUTHOR("Alan Cox"); 282 MODULE_DESCRIPTION("low-level driver for ATI IXP200/300/400"); 283 MODULE_LICENSE("GPL"); 284 MODULE_DEVICE_TABLE(pci, atiixp); 285 MODULE_VERSION(DRV_VERSION); 286 287 module_init(atiixp_init); 288 module_exit(atiixp_exit); 289