1 /* 2 * pata_cypress.c - Cypress PATA for new ATA layer 3 * (C) 2006 Red Hat Inc 4 * Alan Cox <alan@redhat.com> 5 * 6 * Based heavily on 7 * linux/drivers/ide/pci/cy82c693.c Version 0.40 Sep. 10, 2002 8 * 9 */ 10 11 #include <linux/kernel.h> 12 #include <linux/module.h> 13 #include <linux/pci.h> 14 #include <linux/init.h> 15 #include <linux/blkdev.h> 16 #include <linux/delay.h> 17 #include <scsi/scsi_host.h> 18 #include <linux/libata.h> 19 20 #define DRV_NAME "pata_cypress" 21 #define DRV_VERSION "0.1.4" 22 23 /* here are the offset definitions for the registers */ 24 25 enum { 26 CY82_IDE_CMDREG = 0x04, 27 CY82_IDE_ADDRSETUP = 0x48, 28 CY82_IDE_MASTER_IOR = 0x4C, 29 CY82_IDE_MASTER_IOW = 0x4D, 30 CY82_IDE_SLAVE_IOR = 0x4E, 31 CY82_IDE_SLAVE_IOW = 0x4F, 32 CY82_IDE_MASTER_8BIT = 0x50, 33 CY82_IDE_SLAVE_8BIT = 0x51, 34 35 CY82_INDEX_PORT = 0x22, 36 CY82_DATA_PORT = 0x23, 37 38 CY82_INDEX_CTRLREG1 = 0x01, 39 CY82_INDEX_CHANNEL0 = 0x30, 40 CY82_INDEX_CHANNEL1 = 0x31, 41 CY82_INDEX_TIMEOUT = 0x32 42 }; 43 44 static int cy82c693_pre_reset(struct ata_port *ap) 45 { 46 ap->cbl = ATA_CBL_PATA40; 47 return ata_std_prereset(ap); 48 } 49 50 static void cy82c693_error_handler(struct ata_port *ap) 51 { 52 ata_bmdma_drive_eh(ap, cy82c693_pre_reset, ata_std_softreset, NULL, ata_std_postreset); 53 } 54 55 /** 56 * cy82c693_set_piomode - set initial PIO mode data 57 * @ap: ATA interface 58 * @adev: ATA device 59 * 60 * Called to do the PIO mode setup. 61 */ 62 63 static void cy82c693_set_piomode(struct ata_port *ap, struct ata_device *adev) 64 { 65 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 66 struct ata_timing t; 67 const unsigned long T = 1000000 / 33; 68 short time_16, time_8; 69 u32 addr; 70 71 if (ata_timing_compute(adev, adev->pio_mode, &t, T, 1) < 0) { 72 printk(KERN_ERR DRV_NAME ": mome computation failed.\n"); 73 return; 74 } 75 76 time_16 = FIT(t.recover, 0, 15) | (FIT(t.active, 0, 15) << 4); 77 time_8 = FIT(t.act8b, 0, 15) | (FIT(t.rec8b, 0, 15) << 4); 78 79 if (adev->devno == 0) { 80 pci_read_config_dword(pdev, CY82_IDE_ADDRSETUP, &addr); 81 82 addr &= ~0x0F; /* Mask bits */ 83 addr |= FIT(t.setup, 0, 15); 84 85 pci_write_config_dword(pdev, CY82_IDE_ADDRSETUP, addr); 86 pci_write_config_byte(pdev, CY82_IDE_MASTER_IOR, time_16); 87 pci_write_config_byte(pdev, CY82_IDE_MASTER_IOW, time_16); 88 pci_write_config_byte(pdev, CY82_IDE_MASTER_8BIT, time_8); 89 } else { 90 pci_read_config_dword(pdev, CY82_IDE_ADDRSETUP, &addr); 91 92 addr &= ~0xF0; /* Mask bits */ 93 addr |= (FIT(t.setup, 0, 15) << 4); 94 95 pci_write_config_dword(pdev, CY82_IDE_ADDRSETUP, addr); 96 pci_write_config_byte(pdev, CY82_IDE_SLAVE_IOR, time_16); 97 pci_write_config_byte(pdev, CY82_IDE_SLAVE_IOW, time_16); 98 pci_write_config_byte(pdev, CY82_IDE_SLAVE_8BIT, time_8); 99 } 100 } 101 102 /** 103 * cy82c693_set_dmamode - set initial DMA mode data 104 * @ap: ATA interface 105 * @adev: ATA device 106 * 107 * Called to do the DMA mode setup. 108 */ 109 110 static void cy82c693_set_dmamode(struct ata_port *ap, struct ata_device *adev) 111 { 112 int reg = CY82_INDEX_CHANNEL0 + ap->port_no; 113 114 /* Be afraid, be very afraid. Magic registers in low I/O space */ 115 outb(reg, 0x22); 116 outb(adev->dma_mode - XFER_MW_DMA_0, 0x23); 117 118 /* 0x50 gives the best behaviour on the Alpha's using this chip */ 119 outb(CY82_INDEX_TIMEOUT, 0x22); 120 outb(0x50, 0x23); 121 } 122 123 static struct scsi_host_template cy82c693_sht = { 124 .module = THIS_MODULE, 125 .name = DRV_NAME, 126 .ioctl = ata_scsi_ioctl, 127 .queuecommand = ata_scsi_queuecmd, 128 .can_queue = ATA_DEF_QUEUE, 129 .this_id = ATA_SHT_THIS_ID, 130 .sg_tablesize = LIBATA_MAX_PRD, 131 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, 132 .emulated = ATA_SHT_EMULATED, 133 .use_clustering = ATA_SHT_USE_CLUSTERING, 134 .proc_name = DRV_NAME, 135 .dma_boundary = ATA_DMA_BOUNDARY, 136 .slave_configure = ata_scsi_slave_config, 137 .slave_destroy = ata_scsi_slave_destroy, 138 .bios_param = ata_std_bios_param, 139 #ifdef CONFIG_PM 140 .resume = ata_scsi_device_resume, 141 .suspend = ata_scsi_device_suspend, 142 #endif 143 }; 144 145 static struct ata_port_operations cy82c693_port_ops = { 146 .port_disable = ata_port_disable, 147 .set_piomode = cy82c693_set_piomode, 148 .set_dmamode = cy82c693_set_dmamode, 149 .mode_filter = ata_pci_default_filter, 150 151 .tf_load = ata_tf_load, 152 .tf_read = ata_tf_read, 153 .check_status = ata_check_status, 154 .exec_command = ata_exec_command, 155 .dev_select = ata_std_dev_select, 156 157 .freeze = ata_bmdma_freeze, 158 .thaw = ata_bmdma_thaw, 159 .error_handler = cy82c693_error_handler, 160 .post_internal_cmd = ata_bmdma_post_internal_cmd, 161 162 .bmdma_setup = ata_bmdma_setup, 163 .bmdma_start = ata_bmdma_start, 164 .bmdma_stop = ata_bmdma_stop, 165 .bmdma_status = ata_bmdma_status, 166 167 .qc_prep = ata_qc_prep, 168 .qc_issue = ata_qc_issue_prot, 169 170 .data_xfer = ata_data_xfer, 171 172 .irq_handler = ata_interrupt, 173 .irq_clear = ata_bmdma_irq_clear, 174 .irq_on = ata_irq_on, 175 .irq_ack = ata_irq_ack, 176 177 .port_start = ata_port_start, 178 }; 179 180 static int cy82c693_init_one(struct pci_dev *pdev, const struct pci_device_id *id) 181 { 182 static struct ata_port_info info = { 183 .sht = &cy82c693_sht, 184 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, 185 .pio_mask = 0x1f, 186 .mwdma_mask = 0x07, 187 .port_ops = &cy82c693_port_ops 188 }; 189 static struct ata_port_info *port_info[1] = { &info }; 190 191 /* Devfn 1 is the ATA primary. The secondary is magic and on devfn2. 192 For the moment we don't handle the secondary. FIXME */ 193 194 if (PCI_FUNC(pdev->devfn) != 1) 195 return -ENODEV; 196 197 return ata_pci_init_one(pdev, port_info, 1); 198 } 199 200 static const struct pci_device_id cy82c693[] = { 201 { PCI_VDEVICE(CONTAQ, PCI_DEVICE_ID_CONTAQ_82C693), }, 202 203 { }, 204 }; 205 206 static struct pci_driver cy82c693_pci_driver = { 207 .name = DRV_NAME, 208 .id_table = cy82c693, 209 .probe = cy82c693_init_one, 210 .remove = ata_pci_remove_one, 211 #ifdef CONFIG_PM 212 .suspend = ata_pci_device_suspend, 213 .resume = ata_pci_device_resume, 214 #endif 215 }; 216 217 static int __init cy82c693_init(void) 218 { 219 return pci_register_driver(&cy82c693_pci_driver); 220 } 221 222 223 static void __exit cy82c693_exit(void) 224 { 225 pci_unregister_driver(&cy82c693_pci_driver); 226 } 227 228 229 MODULE_AUTHOR("Alan Cox"); 230 MODULE_DESCRIPTION("low-level driver for the CY82C693 PATA controller"); 231 MODULE_LICENSE("GPL"); 232 MODULE_DEVICE_TABLE(pci, cy82c693); 233 MODULE_VERSION(DRV_VERSION); 234 235 module_init(cy82c693_init); 236 module_exit(cy82c693_exit); 237