1 /* 2 * pata_jmicron.c - JMicron ATA driver for non AHCI mode. This drives the 3 * PATA port of the controller. The SATA ports are 4 * driven by AHCI in the usual configuration although 5 * this driver can handle other setups if we need it. 6 * 7 * (c) 2006 Red Hat <alan@redhat.com> 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/module.h> 12 #include <linux/pci.h> 13 #include <linux/init.h> 14 #include <linux/blkdev.h> 15 #include <linux/delay.h> 16 #include <linux/device.h> 17 #include <scsi/scsi_host.h> 18 #include <linux/libata.h> 19 #include <linux/ata.h> 20 21 #define DRV_NAME "pata_jmicron" 22 #define DRV_VERSION "0.1.5" 23 24 typedef enum { 25 PORT_PATA0 = 0, 26 PORT_PATA1 = 1, 27 PORT_SATA = 2, 28 } port_type; 29 30 /** 31 * jmicron_pre_reset - check for 40/80 pin 32 * @link: ATA link 33 * @deadline: deadline jiffies for the operation 34 * 35 * Perform the PATA port setup we need. 36 * 37 * On the Jmicron 361/363 there is a single PATA port that can be mapped 38 * either as primary or secondary (or neither). We don't do any policy 39 * and setup here. We assume that has been done by init_one and the 40 * BIOS. 41 */ 42 static int jmicron_pre_reset(struct ata_link *link, unsigned long deadline) 43 { 44 struct ata_port *ap = link->ap; 45 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 46 u32 control; 47 u32 control5; 48 int port_mask = 1<< (4 * ap->port_no); 49 int port = ap->port_no; 50 port_type port_map[2]; 51 52 /* Check if our port is enabled */ 53 pci_read_config_dword(pdev, 0x40, &control); 54 if ((control & port_mask) == 0) 55 return -ENOENT; 56 57 /* There are two basic mappings. One has the two SATA ports merged 58 as master/slave and the secondary as PATA, the other has only the 59 SATA port mapped */ 60 if (control & (1 << 23)) { 61 port_map[0] = PORT_SATA; 62 port_map[1] = PORT_PATA0; 63 } else { 64 port_map[0] = PORT_SATA; 65 port_map[1] = PORT_SATA; 66 } 67 68 /* The 365/366 may have this bit set to map the second PATA port 69 as the internal primary channel */ 70 pci_read_config_dword(pdev, 0x80, &control5); 71 if (control5 & (1<<24)) 72 port_map[0] = PORT_PATA1; 73 74 /* The two ports may then be logically swapped by the firmware */ 75 if (control & (1 << 22)) 76 port = port ^ 1; 77 78 /* 79 * Now we know which physical port we are talking about we can 80 * actually do our cable checking etc. Thankfully we don't need 81 * to do the plumbing for other cases. 82 */ 83 switch (port_map[port]) { 84 case PORT_PATA0: 85 if ((control & (1 << 5)) == 0) 86 return -ENOENT; 87 if (control & (1 << 3)) /* 40/80 pin primary */ 88 ap->cbl = ATA_CBL_PATA40; 89 else 90 ap->cbl = ATA_CBL_PATA80; 91 break; 92 case PORT_PATA1: 93 /* Bit 21 is set if the port is enabled */ 94 if ((control5 & (1 << 21)) == 0) 95 return -ENOENT; 96 if (control5 & (1 << 19)) /* 40/80 pin secondary */ 97 ap->cbl = ATA_CBL_PATA40; 98 else 99 ap->cbl = ATA_CBL_PATA80; 100 break; 101 case PORT_SATA: 102 ap->cbl = ATA_CBL_SATA; 103 break; 104 } 105 return ata_std_prereset(link, deadline); 106 } 107 108 /** 109 * jmicron_error_handler - Setup and error handler 110 * @ap: Port to handle 111 * 112 * LOCKING: 113 * None (inherited from caller). 114 */ 115 116 static void jmicron_error_handler(struct ata_port *ap) 117 { 118 return ata_bmdma_drive_eh(ap, jmicron_pre_reset, ata_std_softreset, NULL, ata_std_postreset); 119 } 120 121 /* No PIO or DMA methods needed for this device */ 122 123 static struct scsi_host_template jmicron_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 /* Use standard CHS mapping rules */ 139 .bios_param = ata_std_bios_param, 140 }; 141 142 static const struct ata_port_operations jmicron_ops = { 143 /* Task file is PCI ATA format, use helpers */ 144 .tf_load = ata_tf_load, 145 .tf_read = ata_tf_read, 146 .check_status = ata_check_status, 147 .exec_command = ata_exec_command, 148 .dev_select = ata_std_dev_select, 149 150 .freeze = ata_bmdma_freeze, 151 .thaw = ata_bmdma_thaw, 152 .error_handler = jmicron_error_handler, 153 .post_internal_cmd = ata_bmdma_post_internal_cmd, 154 155 /* BMDMA handling is PCI ATA format, use helpers */ 156 .bmdma_setup = ata_bmdma_setup, 157 .bmdma_start = ata_bmdma_start, 158 .bmdma_stop = ata_bmdma_stop, 159 .bmdma_status = ata_bmdma_status, 160 .qc_prep = ata_qc_prep, 161 .qc_issue = ata_qc_issue_prot, 162 .data_xfer = ata_data_xfer, 163 164 /* IRQ-related hooks */ 165 .irq_handler = ata_interrupt, 166 .irq_clear = ata_bmdma_irq_clear, 167 .irq_on = ata_irq_on, 168 169 /* Generic PATA PCI ATA helpers */ 170 .port_start = ata_port_start, 171 }; 172 173 174 /** 175 * jmicron_init_one - Register Jmicron ATA PCI device with kernel services 176 * @pdev: PCI device to register 177 * @ent: Entry in jmicron_pci_tbl matching with @pdev 178 * 179 * Called from kernel PCI layer. 180 * 181 * LOCKING: 182 * Inherited from PCI layer (may sleep). 183 * 184 * RETURNS: 185 * Zero on success, or -ERRNO value. 186 */ 187 188 static int jmicron_init_one (struct pci_dev *pdev, const struct pci_device_id *id) 189 { 190 static const struct ata_port_info info = { 191 .sht = &jmicron_sht, 192 .flags = ATA_FLAG_SLAVE_POSS, 193 194 .pio_mask = 0x1f, 195 .mwdma_mask = 0x07, 196 .udma_mask = ATA_UDMA5, 197 198 .port_ops = &jmicron_ops, 199 }; 200 const struct ata_port_info *ppi[] = { &info, NULL }; 201 202 return ata_pci_init_one(pdev, ppi); 203 } 204 205 static const struct pci_device_id jmicron_pci_tbl[] = { 206 { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, 207 PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 0 }, 208 { } /* terminate list */ 209 }; 210 211 static struct pci_driver jmicron_pci_driver = { 212 .name = DRV_NAME, 213 .id_table = jmicron_pci_tbl, 214 .probe = jmicron_init_one, 215 .remove = ata_pci_remove_one, 216 #ifdef CONFIG_PM 217 .suspend = ata_pci_device_suspend, 218 .resume = ata_pci_device_resume, 219 #endif 220 }; 221 222 static int __init jmicron_init(void) 223 { 224 return pci_register_driver(&jmicron_pci_driver); 225 } 226 227 static void __exit jmicron_exit(void) 228 { 229 pci_unregister_driver(&jmicron_pci_driver); 230 } 231 232 module_init(jmicron_init); 233 module_exit(jmicron_exit); 234 235 MODULE_AUTHOR("Alan Cox"); 236 MODULE_DESCRIPTION("SCSI low-level driver for Jmicron PATA ports"); 237 MODULE_LICENSE("GPL"); 238 MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl); 239 MODULE_VERSION(DRV_VERSION); 240 241