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 "0.1.2" 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 * @ap: Port 33 * 34 * Perform the PATA port setup we need. 35 36 * On the Jmicron 361/363 there is a single PATA port that can be mapped 37 * either as primary or secondary (or neither). We don't do any policy 38 * and setup here. We assume that has been done by init_one and the 39 * BIOS. 40 */ 41 42 static int jmicron_pre_reset(struct ata_port *ap) 43 { 44 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 45 u32 control; 46 u32 control5; 47 int port_mask = 1<< (4 * ap->port_no); 48 int port = ap->port_no; 49 port_type port_map[2]; 50 51 /* Check if our port is enabled */ 52 pci_read_config_dword(pdev, 0x40, &control); 53 if ((control & port_mask) == 0) 54 return -ENOENT; 55 56 /* There are two basic mappings. One has the two SATA ports merged 57 as master/slave and the secondary as PATA, the other has only the 58 SATA port mapped */ 59 if (control & (1 << 23)) { 60 port_map[0] = PORT_SATA; 61 port_map[1] = PORT_PATA0; 62 } else { 63 port_map[0] = PORT_SATA; 64 port_map[1] = PORT_SATA; 65 } 66 67 /* The 365/366 may have this bit set to map the second PATA port 68 as the internal primary channel */ 69 pci_read_config_dword(pdev, 0x80, &control5); 70 if (control5 & (1<<24)) 71 port_map[0] = PORT_PATA1; 72 73 /* The two ports may then be logically swapped by the firmware */ 74 if (control & (1 << 22)) 75 port = port ^ 1; 76 77 /* 78 * Now we know which physical port we are talking about we can 79 * actually do our cable checking etc. Thankfully we don't need 80 * to do the plumbing for other cases. 81 */ 82 switch (port_map[port]) 83 { 84 case PORT_PATA0: 85 if (control & (1 << 5)) 86 return 0; 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 0; 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(ap); 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 /* Special handling needed if you have sector or LBA48 limits */ 132 .max_sectors = ATA_MAX_SECTORS, 133 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, 134 .emulated = ATA_SHT_EMULATED, 135 .use_clustering = ATA_SHT_USE_CLUSTERING, 136 .proc_name = DRV_NAME, 137 .dma_boundary = ATA_DMA_BOUNDARY, 138 .slave_configure = ata_scsi_slave_config, 139 /* Use standard CHS mapping rules */ 140 .bios_param = ata_std_bios_param, 141 }; 142 143 static const struct ata_port_operations jmicron_ops = { 144 .port_disable = ata_port_disable, 145 146 /* Task file is PCI ATA format, use helpers */ 147 .tf_load = ata_tf_load, 148 .tf_read = ata_tf_read, 149 .check_status = ata_check_status, 150 .exec_command = ata_exec_command, 151 .dev_select = ata_std_dev_select, 152 153 .freeze = ata_bmdma_freeze, 154 .thaw = ata_bmdma_thaw, 155 .error_handler = jmicron_error_handler, 156 .post_internal_cmd = ata_bmdma_post_internal_cmd, 157 158 /* BMDMA handling is PCI ATA format, use helpers */ 159 .bmdma_setup = ata_bmdma_setup, 160 .bmdma_start = ata_bmdma_start, 161 .bmdma_stop = ata_bmdma_stop, 162 .bmdma_status = ata_bmdma_status, 163 .qc_prep = ata_qc_prep, 164 .qc_issue = ata_qc_issue_prot, 165 .data_xfer = ata_pio_data_xfer, 166 167 /* IRQ-related hooks */ 168 .irq_handler = ata_interrupt, 169 .irq_clear = ata_bmdma_irq_clear, 170 171 /* Generic PATA PCI ATA helpers */ 172 .port_start = ata_port_start, 173 .port_stop = ata_port_stop, 174 .host_stop = ata_host_stop, 175 }; 176 177 178 /** 179 * jmicron_init_one - Register Jmicron ATA PCI device with kernel services 180 * @pdev: PCI device to register 181 * @ent: Entry in jmicron_pci_tbl matching with @pdev 182 * 183 * Called from kernel PCI layer. 184 * 185 * LOCKING: 186 * Inherited from PCI layer (may sleep). 187 * 188 * RETURNS: 189 * Zero on success, or -ERRNO value. 190 */ 191 192 static int jmicron_init_one (struct pci_dev *pdev, const struct pci_device_id *id) 193 { 194 static struct ata_port_info info = { 195 .sht = &jmicron_sht, 196 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, 197 198 .pio_mask = 0x1f, 199 .mwdma_mask = 0x07, 200 .udma_mask = 0x3f, 201 202 .port_ops = &jmicron_ops, 203 }; 204 struct ata_port_info *port_info[2] = { &info, &info }; 205 206 u32 reg; 207 208 if (id->driver_data != 368) { 209 /* Put the controller into AHCI mode in case the AHCI driver 210 has not yet been loaded. This can be done with either 211 function present */ 212 213 /* FIXME: We may want a way to override this in future */ 214 pci_write_config_byte(pdev, 0x41, 0xa1); 215 } 216 217 /* PATA controller is fn 1, AHCI is fn 0 */ 218 if (PCI_FUNC(pdev->devfn) != 1) 219 return -ENODEV; 220 221 if ( id->driver_data == 365 || id->driver_data == 366) { 222 /* The 365/66 have two PATA channels, redirect the second */ 223 pci_read_config_dword(pdev, 0x80, ®); 224 reg |= (1 << 24); /* IDE1 to PATA IDE secondary */ 225 pci_write_config_dword(pdev, 0x80, reg); 226 } 227 228 return ata_pci_init_one(pdev, port_info, 2); 229 } 230 231 static const struct pci_device_id jmicron_pci_tbl[] = { 232 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB361), 361}, 233 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB363), 363}, 234 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB365), 365}, 235 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB366), 366}, 236 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB368), 368}, 237 238 { } /* terminate list */ 239 }; 240 241 static struct pci_driver jmicron_pci_driver = { 242 .name = DRV_NAME, 243 .id_table = jmicron_pci_tbl, 244 .probe = jmicron_init_one, 245 .remove = ata_pci_remove_one, 246 }; 247 248 static int __init jmicron_init(void) 249 { 250 return pci_register_driver(&jmicron_pci_driver); 251 } 252 253 static void __exit jmicron_exit(void) 254 { 255 pci_unregister_driver(&jmicron_pci_driver); 256 } 257 258 module_init(jmicron_init); 259 module_exit(jmicron_exit); 260 261 MODULE_AUTHOR("Alan Cox"); 262 MODULE_DESCRIPTION("SCSI low-level driver for Jmicron PATA ports"); 263 MODULE_LICENSE("GPL"); 264 MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl); 265 MODULE_VERSION(DRV_VERSION); 266 267