1 /* 2 * pata_netcell.c - Netcell PATA driver 3 * 4 * (c) 2006 Red Hat <alan@redhat.com> 5 */ 6 7 #include <linux/kernel.h> 8 #include <linux/module.h> 9 #include <linux/pci.h> 10 #include <linux/init.h> 11 #include <linux/blkdev.h> 12 #include <linux/delay.h> 13 #include <linux/device.h> 14 #include <scsi/scsi_host.h> 15 #include <linux/libata.h> 16 #include <linux/ata.h> 17 18 #define DRV_NAME "pata_netcell" 19 #define DRV_VERSION "0.1.6" 20 21 /** 22 * netcell_probe_init - check for 40/80 pin 23 * @ap: Port 24 * 25 * Cables are handled by the RAID controller. Report 80 pin. 26 */ 27 28 static int netcell_pre_reset(struct ata_port *ap) 29 { 30 ap->cbl = ATA_CBL_PATA80; 31 return ata_std_prereset(ap); 32 } 33 34 /** 35 * netcell_probe_reset - Probe specified port on PATA host controller 36 * @ap: Port to probe 37 * 38 * LOCKING: 39 * None (inherited from caller). 40 */ 41 42 static void netcell_error_handler(struct ata_port *ap) 43 { 44 return ata_bmdma_drive_eh(ap, netcell_pre_reset, ata_std_softreset, NULL, ata_std_postreset); 45 } 46 47 /* No PIO or DMA methods needed for this device */ 48 49 static struct scsi_host_template netcell_sht = { 50 .module = THIS_MODULE, 51 .name = DRV_NAME, 52 .ioctl = ata_scsi_ioctl, 53 .queuecommand = ata_scsi_queuecmd, 54 .can_queue = ATA_DEF_QUEUE, 55 .this_id = ATA_SHT_THIS_ID, 56 .sg_tablesize = LIBATA_MAX_PRD, 57 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, 58 .emulated = ATA_SHT_EMULATED, 59 .use_clustering = ATA_SHT_USE_CLUSTERING, 60 .proc_name = DRV_NAME, 61 .dma_boundary = ATA_DMA_BOUNDARY, 62 .slave_configure = ata_scsi_slave_config, 63 .slave_destroy = ata_scsi_slave_destroy, 64 /* Use standard CHS mapping rules */ 65 .bios_param = ata_std_bios_param, 66 #ifdef CONFIG_PM 67 .resume = ata_scsi_device_resume, 68 .suspend = ata_scsi_device_suspend, 69 #endif 70 }; 71 72 static const struct ata_port_operations netcell_ops = { 73 .port_disable = ata_port_disable, 74 75 /* Task file is PCI ATA format, use helpers */ 76 .tf_load = ata_tf_load, 77 .tf_read = ata_tf_read, 78 .check_status = ata_check_status, 79 .exec_command = ata_exec_command, 80 .dev_select = ata_std_dev_select, 81 82 .freeze = ata_bmdma_freeze, 83 .thaw = ata_bmdma_thaw, 84 .error_handler = netcell_error_handler, 85 .post_internal_cmd = ata_bmdma_post_internal_cmd, 86 87 /* BMDMA handling is PCI ATA format, use helpers */ 88 .bmdma_setup = ata_bmdma_setup, 89 .bmdma_start = ata_bmdma_start, 90 .bmdma_stop = ata_bmdma_stop, 91 .bmdma_status = ata_bmdma_status, 92 .qc_prep = ata_qc_prep, 93 .qc_issue = ata_qc_issue_prot, 94 .data_xfer = ata_data_xfer, 95 96 /* IRQ-related hooks */ 97 .irq_handler = ata_interrupt, 98 .irq_clear = ata_bmdma_irq_clear, 99 .irq_on = ata_irq_on, 100 .irq_ack = ata_irq_ack, 101 102 /* Generic PATA PCI ATA helpers */ 103 .port_start = ata_port_start, 104 }; 105 106 107 /** 108 * netcell_init_one - Register Netcell ATA PCI device with kernel services 109 * @pdev: PCI device to register 110 * @ent: Entry in netcell_pci_tbl matching with @pdev 111 * 112 * Called from kernel PCI layer. 113 * 114 * LOCKING: 115 * Inherited from PCI layer (may sleep). 116 * 117 * RETURNS: 118 * Zero on success, or -ERRNO value. 119 */ 120 121 static int netcell_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) 122 { 123 static int printed_version; 124 static struct ata_port_info info = { 125 .sht = &netcell_sht, 126 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, 127 /* Actually we don't really care about these as the 128 firmware deals with it */ 129 .pio_mask = 0x1f, /* pio0-4 */ 130 .mwdma_mask = 0x07, /* mwdma0-2 */ 131 .udma_mask = 0x3f, /* UDMA 133 */ 132 .port_ops = &netcell_ops, 133 }; 134 static struct ata_port_info *port_info[2] = { &info, &info }; 135 136 if (!printed_version++) 137 dev_printk(KERN_DEBUG, &pdev->dev, 138 "version " DRV_VERSION "\n"); 139 140 /* Any chip specific setup/optimisation/messages here */ 141 ata_pci_clear_simplex(pdev); 142 143 /* And let the library code do the work */ 144 return ata_pci_init_one(pdev, port_info, 2); 145 } 146 147 static const struct pci_device_id netcell_pci_tbl[] = { 148 { PCI_VDEVICE(NETCELL, PCI_DEVICE_ID_REVOLUTION), }, 149 150 { } /* terminate list */ 151 }; 152 153 static struct pci_driver netcell_pci_driver = { 154 .name = DRV_NAME, 155 .id_table = netcell_pci_tbl, 156 .probe = netcell_init_one, 157 .remove = ata_pci_remove_one, 158 #ifdef CONFIG_PM 159 .suspend = ata_pci_device_suspend, 160 .resume = ata_pci_device_resume, 161 #endif 162 }; 163 164 static int __init netcell_init(void) 165 { 166 return pci_register_driver(&netcell_pci_driver); 167 } 168 169 static void __exit netcell_exit(void) 170 { 171 pci_unregister_driver(&netcell_pci_driver); 172 } 173 174 module_init(netcell_init); 175 module_exit(netcell_exit); 176 177 MODULE_AUTHOR("Alan Cox"); 178 MODULE_DESCRIPTION("SCSI low-level driver for Netcell PATA RAID"); 179 MODULE_LICENSE("GPL"); 180 MODULE_DEVICE_TABLE(pci, netcell_pci_tbl); 181 MODULE_VERSION(DRV_VERSION); 182 183