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.
7 * (c) 2006 Red Hat <alan@redhat.com>
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>
21 #define DRV_NAME "pata_jmicron"
22 #define DRV_VERSION "0.1.4"
31 * jmicron_pre_reset - check for 40/80 pin
34 * Perform the PATA port setup we need.
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
42 static int jmicron_pre_reset(struct ata_port *ap)
44 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
47 int port_mask = 1<< (4 * ap->port_no);
48 int port = ap->port_no;
49 port_type port_map[2];
51 /* Check if our port is enabled */
52 pci_read_config_dword(pdev, 0x40, &control);
53 if ((control & port_mask) == 0)
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
59 if (control & (1 << 23)) {
60 port_map[0] = PORT_SATA;
61 port_map[1] = PORT_PATA0;
63 port_map[0] = PORT_SATA;
64 port_map[1] = PORT_SATA;
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;
73 /* The two ports may then be logically swapped by the firmware */
74 if (control & (1 << 22))
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.
82 switch (port_map[port])
85 if (control & (1 << 5))
87 if (control & (1 << 3)) /* 40/80 pin primary */
88 ap->cbl = ATA_CBL_PATA40;
90 ap->cbl = ATA_CBL_PATA80;
93 /* Bit 21 is set if the port is enabled */
94 if ((control5 & (1 << 21)) == 0)
96 if (control5 & (1 << 19)) /* 40/80 pin secondary */
97 ap->cbl = ATA_CBL_PATA40;
99 ap->cbl = ATA_CBL_PATA80;
102 ap->cbl = ATA_CBL_SATA;
105 return ata_std_prereset(ap);
109 * jmicron_error_handler - Setup and error handler
110 * @ap: Port to handle
113 * None (inherited from caller).
116 static void jmicron_error_handler(struct ata_port *ap)
118 return ata_bmdma_drive_eh(ap, jmicron_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
121 /* No PIO or DMA methods needed for this device */
123 static struct scsi_host_template jmicron_sht = {
124 .module = THIS_MODULE,
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,
142 static const struct ata_port_operations jmicron_ops = {
143 .port_disable = ata_port_disable,
145 /* Task file is PCI ATA format, use helpers */
146 .tf_load = ata_tf_load,
147 .tf_read = ata_tf_read,
148 .check_status = ata_check_status,
149 .exec_command = ata_exec_command,
150 .dev_select = ata_std_dev_select,
152 .freeze = ata_bmdma_freeze,
153 .thaw = ata_bmdma_thaw,
154 .error_handler = jmicron_error_handler,
155 .post_internal_cmd = ata_bmdma_post_internal_cmd,
157 /* BMDMA handling is PCI ATA format, use helpers */
158 .bmdma_setup = ata_bmdma_setup,
159 .bmdma_start = ata_bmdma_start,
160 .bmdma_stop = ata_bmdma_stop,
161 .bmdma_status = ata_bmdma_status,
162 .qc_prep = ata_qc_prep,
163 .qc_issue = ata_qc_issue_prot,
164 .data_xfer = ata_data_xfer,
166 /* IRQ-related hooks */
167 .irq_handler = ata_interrupt,
168 .irq_clear = ata_bmdma_irq_clear,
169 .irq_on = ata_irq_on,
170 .irq_ack = ata_irq_ack,
172 /* Generic PATA PCI ATA helpers */
173 .port_start = ata_port_start,
178 * jmicron_init_one - Register Jmicron ATA PCI device with kernel services
179 * @pdev: PCI device to register
180 * @ent: Entry in jmicron_pci_tbl matching with @pdev
182 * Called from kernel PCI layer.
185 * Inherited from PCI layer (may sleep).
188 * Zero on success, or -ERRNO value.
191 static int jmicron_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
193 static struct ata_port_info info = {
195 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
201 .port_ops = &jmicron_ops,
203 struct ata_port_info *port_info[2] = { &info, &info };
207 /* PATA controller is fn 1, AHCI is fn 0 */
208 if (id->driver_data != 368 && PCI_FUNC(pdev->devfn) != 1)
211 /* The 365/66 have two PATA channels, redirect the second */
212 if (id->driver_data == 365 || id->driver_data == 366) {
213 pci_read_config_dword(pdev, 0x80, ®);
214 reg |= (1 << 24); /* IDE1 to PATA IDE secondary */
215 pci_write_config_dword(pdev, 0x80, reg);
218 return ata_pci_init_one(pdev, port_info, 2);
221 static int jmicron_reinit_one(struct pci_dev *pdev)
225 switch(pdev->device) {
226 case PCI_DEVICE_ID_JMICRON_JMB368:
228 case PCI_DEVICE_ID_JMICRON_JMB365:
229 case PCI_DEVICE_ID_JMICRON_JMB366:
230 /* Restore mapping or disks swap and boy does it get ugly */
231 pci_read_config_dword(pdev, 0x80, ®);
232 reg |= (1 << 24); /* IDE1 to PATA IDE secondary */
233 pci_write_config_dword(pdev, 0x80, reg);
236 /* Make sure AHCI is turned back on */
237 pci_write_config_byte(pdev, 0x41, 0xa1);
239 return ata_pci_device_resume(pdev);
242 static const struct pci_device_id jmicron_pci_tbl[] = {
243 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB361), 361},
244 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB363), 363},
245 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB365), 365},
246 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB366), 366},
247 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB368), 368},
249 { } /* terminate list */
252 static struct pci_driver jmicron_pci_driver = {
254 .id_table = jmicron_pci_tbl,
255 .probe = jmicron_init_one,
256 .remove = ata_pci_remove_one,
257 .suspend = ata_pci_device_suspend,
258 .resume = jmicron_reinit_one,
261 static int __init jmicron_init(void)
263 return pci_register_driver(&jmicron_pci_driver);
266 static void __exit jmicron_exit(void)
268 pci_unregister_driver(&jmicron_pci_driver);
271 module_init(jmicron_init);
272 module_exit(jmicron_exit);
274 MODULE_AUTHOR("Alan Cox");
275 MODULE_DESCRIPTION("SCSI low-level driver for Jmicron PATA ports");
276 MODULE_LICENSE("GPL");
277 MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl);
278 MODULE_VERSION(DRV_VERSION);