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 24typedef 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 * @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 43static int jmicron_pre_reset(struct ata_port *ap, unsigned long deadline) 44{ 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 { 85 case PORT_PATA0: 86 if (control & (1 << 5)) 87 return 0; 88 if (control & (1 << 3)) /* 40/80 pin primary */ 89 ap->cbl = ATA_CBL_PATA40; 90 else 91 ap->cbl = ATA_CBL_PATA80; 92 break; 93 case PORT_PATA1: 94 /* Bit 21 is set if the port is enabled */ 95 if ((control5 & (1 << 21)) == 0) 96 return 0; 97 if (control5 & (1 << 19)) /* 40/80 pin secondary */ 98 ap->cbl = ATA_CBL_PATA40; 99 else 100 ap->cbl = ATA_CBL_PATA80; 101 break; 102 case PORT_SATA: 103 ap->cbl = ATA_CBL_SATA; 104 break; 105 } 106 return ata_std_prereset(ap, deadline); 107} 108 109/** 110 * jmicron_error_handler - Setup and error handler 111 * @ap: Port to handle 112 * 113 * LOCKING: 114 * None (inherited from caller). 115 */ 116 117static void jmicron_error_handler(struct ata_port *ap) 118{ 119 return ata_bmdma_drive_eh(ap, jmicron_pre_reset, ata_std_softreset, NULL, ata_std_postreset); 120} 121 122/* No PIO or DMA methods needed for this device */ 123 124static struct scsi_host_template jmicron_sht = { 125 .module = THIS_MODULE, 126 .name = DRV_NAME, 127 .ioctl = ata_scsi_ioctl, 128 .queuecommand = ata_scsi_queuecmd, 129 .can_queue = ATA_DEF_QUEUE, 130 .this_id = ATA_SHT_THIS_ID, 131 .sg_tablesize = LIBATA_MAX_PRD, 132 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, 133 .emulated = ATA_SHT_EMULATED, 134 .use_clustering = ATA_SHT_USE_CLUSTERING, 135 .proc_name = DRV_NAME, 136 .dma_boundary = ATA_DMA_BOUNDARY, 137 .slave_configure = ata_scsi_slave_config, 138 .slave_destroy = ata_scsi_slave_destroy, 139 /* Use standard CHS mapping rules */ 140 .bios_param = ata_std_bios_param, 141}; 142 143static 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_data_xfer, 166 167 /* IRQ-related hooks */ 168 .irq_handler = ata_interrupt, 169 .irq_clear = ata_bmdma_irq_clear, 170 .irq_on = ata_irq_on, 171 .irq_ack = ata_irq_ack, 172 173 /* Generic PATA PCI ATA helpers */ 174 .port_start = ata_port_start, 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 192static int jmicron_init_one (struct pci_dev *pdev, const struct pci_device_id *id) 193{ 194 static const 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 const struct ata_port_info *ppi[] = { &info, NULL }; 205 206 return ata_pci_init_one(pdev, ppi); 207} 208 209static const struct pci_device_id jmicron_pci_tbl[] = { 210 { PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB361, 211 PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 361 }, 212 { PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB363, 213 PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 363 }, 214 { PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB365, 215 PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 365 }, 216 { PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB366, 217 PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 366 }, 218 { PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB368, 219 PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 368 }, 220 221 { } /* terminate list */ 222}; 223 224static struct pci_driver jmicron_pci_driver = { 225 .name = DRV_NAME, 226 .id_table = jmicron_pci_tbl, 227 .probe = jmicron_init_one, 228 .remove = ata_pci_remove_one, 229#ifdef CONFIG_PM 230 .suspend = ata_pci_device_suspend, 231 .resume = ata_pci_device_resume, 232#endif 233}; 234 235static int __init jmicron_init(void) 236{ 237 return pci_register_driver(&jmicron_pci_driver); 238} 239 240static void __exit jmicron_exit(void) 241{ 242 pci_unregister_driver(&jmicron_pci_driver); 243} 244 245module_init(jmicron_init); 246module_exit(jmicron_exit); 247 248MODULE_AUTHOR("Alan Cox"); 249MODULE_DESCRIPTION("SCSI low-level driver for Jmicron PATA ports"); 250MODULE_LICENSE("GPL"); 251MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl); 252MODULE_VERSION(DRV_VERSION); 253