| 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); |