1 /* 2 * pata_cypress.c - Cypress PATA for new ATA layer 3 * (C) 2006 Red Hat Inc 4 * Alan Cox 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/blkdev.h> 15 #include <linux/delay.h> 16 #include <scsi/scsi_host.h> 17 #include <linux/libata.h> 18 19 #define DRV_NAME "pata_cypress" 20 #define DRV_VERSION "0.1.5" 21 22 /* here are the offset definitions for the registers */ 23 24 enum { 25 CY82_IDE_CMDREG = 0x04, 26 CY82_IDE_ADDRSETUP = 0x48, 27 CY82_IDE_MASTER_IOR = 0x4C, 28 CY82_IDE_MASTER_IOW = 0x4D, 29 CY82_IDE_SLAVE_IOR = 0x4E, 30 CY82_IDE_SLAVE_IOW = 0x4F, 31 CY82_IDE_MASTER_8BIT = 0x50, 32 CY82_IDE_SLAVE_8BIT = 0x51, 33 34 CY82_INDEX_PORT = 0x22, 35 CY82_DATA_PORT = 0x23, 36 37 CY82_INDEX_CTRLREG1 = 0x01, 38 CY82_INDEX_CHANNEL0 = 0x30, 39 CY82_INDEX_CHANNEL1 = 0x31, 40 CY82_INDEX_TIMEOUT = 0x32 41 }; 42 43 /** 44 * cy82c693_set_piomode - set initial PIO mode data 45 * @ap: ATA interface 46 * @adev: ATA device 47 * 48 * Called to do the PIO mode setup. 49 */ 50 51 static void cy82c693_set_piomode(struct ata_port *ap, struct ata_device *adev) 52 { 53 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 54 struct ata_timing t; 55 const unsigned long T = 1000000 / 33; 56 short time_16, time_8; 57 u32 addr; 58 59 if (ata_timing_compute(adev, adev->pio_mode, &t, T, 1) < 0) { 60 printk(KERN_ERR DRV_NAME ": mome computation failed.\n"); 61 return; 62 } 63 64 time_16 = clamp_val(t.recover - 1, 0, 15) | 65 (clamp_val(t.active - 1, 0, 15) << 4); 66 time_8 = clamp_val(t.act8b - 1, 0, 15) | 67 (clamp_val(t.rec8b - 1, 0, 15) << 4); 68 69 if (adev->devno == 0) { 70 pci_read_config_dword(pdev, CY82_IDE_ADDRSETUP, &addr); 71 72 addr &= ~0x0F; /* Mask bits */ 73 addr |= clamp_val(t.setup - 1, 0, 15); 74 75 pci_write_config_dword(pdev, CY82_IDE_ADDRSETUP, addr); 76 pci_write_config_byte(pdev, CY82_IDE_MASTER_IOR, time_16); 77 pci_write_config_byte(pdev, CY82_IDE_MASTER_IOW, time_16); 78 pci_write_config_byte(pdev, CY82_IDE_MASTER_8BIT, time_8); 79 } else { 80 pci_read_config_dword(pdev, CY82_IDE_ADDRSETUP, &addr); 81 82 addr &= ~0xF0; /* Mask bits */ 83 addr |= (clamp_val(t.setup - 1, 0, 15) << 4); 84 85 pci_write_config_dword(pdev, CY82_IDE_ADDRSETUP, addr); 86 pci_write_config_byte(pdev, CY82_IDE_SLAVE_IOR, time_16); 87 pci_write_config_byte(pdev, CY82_IDE_SLAVE_IOW, time_16); 88 pci_write_config_byte(pdev, CY82_IDE_SLAVE_8BIT, time_8); 89 } 90 } 91 92 /** 93 * cy82c693_set_dmamode - set initial DMA mode data 94 * @ap: ATA interface 95 * @adev: ATA device 96 * 97 * Called to do the DMA mode setup. 98 */ 99 100 static void cy82c693_set_dmamode(struct ata_port *ap, struct ata_device *adev) 101 { 102 int reg = CY82_INDEX_CHANNEL0 + ap->port_no; 103 104 /* Be afraid, be very afraid. Magic registers in low I/O space */ 105 outb(reg, 0x22); 106 outb(adev->dma_mode - XFER_MW_DMA_0, 0x23); 107 108 /* 0x50 gives the best behaviour on the Alpha's using this chip */ 109 outb(CY82_INDEX_TIMEOUT, 0x22); 110 outb(0x50, 0x23); 111 } 112 113 static struct scsi_host_template cy82c693_sht = { 114 ATA_BMDMA_SHT(DRV_NAME), 115 }; 116 117 static struct ata_port_operations cy82c693_port_ops = { 118 .inherits = &ata_bmdma_port_ops, 119 .cable_detect = ata_cable_40wire, 120 .set_piomode = cy82c693_set_piomode, 121 .set_dmamode = cy82c693_set_dmamode, 122 }; 123 124 static int cy82c693_init_one(struct pci_dev *pdev, const struct pci_device_id *id) 125 { 126 static const struct ata_port_info info = { 127 .flags = ATA_FLAG_SLAVE_POSS, 128 .pio_mask = ATA_PIO4, 129 .mwdma_mask = ATA_MWDMA2, 130 .port_ops = &cy82c693_port_ops 131 }; 132 const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info }; 133 134 /* Devfn 1 is the ATA primary. The secondary is magic and on devfn2. 135 For the moment we don't handle the secondary. FIXME */ 136 137 if (PCI_FUNC(pdev->devfn) != 1) 138 return -ENODEV; 139 140 return ata_pci_bmdma_init_one(pdev, ppi, &cy82c693_sht, NULL, 0); 141 } 142 143 static const struct pci_device_id cy82c693[] = { 144 { PCI_VDEVICE(CONTAQ, PCI_DEVICE_ID_CONTAQ_82C693), }, 145 146 { }, 147 }; 148 149 static struct pci_driver cy82c693_pci_driver = { 150 .name = DRV_NAME, 151 .id_table = cy82c693, 152 .probe = cy82c693_init_one, 153 .remove = ata_pci_remove_one, 154 #ifdef CONFIG_PM 155 .suspend = ata_pci_device_suspend, 156 .resume = ata_pci_device_resume, 157 #endif 158 }; 159 160 module_pci_driver(cy82c693_pci_driver); 161 162 MODULE_AUTHOR("Alan Cox"); 163 MODULE_DESCRIPTION("low-level driver for the CY82C693 PATA controller"); 164 MODULE_LICENSE("GPL"); 165 MODULE_DEVICE_TABLE(pci, cy82c693); 166 MODULE_VERSION(DRV_VERSION); 167