Signed-off-by: Alan Cox <alan@xxxxxxxxxx>
Driver for the Jmicron PATA port (The SATA side is handled by AHCI)
---
drivers/ata/pata_jmicron.c | 266 ++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 266 insertions(+), 0 deletions(-)
create mode 100644 drivers/ata/pata_jmicron.c
d6b95a623ddce2576b11ebf0bce66c3fb240f368
diff --git a/drivers/ata/pata_jmicron.c b/drivers/ata/pata_jmicron.c
new file mode 100644
index 0000000..4b58a18
--- /dev/null
+++ b/drivers/ata/pata_jmicron.c
@@ -0,0 +1,266 @@
+/*
+ * pata_jmicron.c - JMicron ATA driver for non AHCI mode. This drives the
+ * PATA port of the controller. The SATA ports are
+ * driven by AHCI in the usual configuration although
+ * this driver can handle other setups if we need it.
+ *
+ * (c) 2006 Red Hat <alan@xxxxxxxxxx>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <scsi/scsi_host.h>
+#include <linux/libata.h>
+#include <linux/ata.h>
+
+#define DRV_NAME "pata_jmicron"
+#define DRV_VERSION "0.1.2"
+
+typedef enum {
+ PORT_PATA0 = 0,
+ PORT_PATA1 = 1,
+ PORT_SATA = 2,
+} port_type;
+
+/**
+ * jmicron_pre_reset - check for 40/80 pin
+ * @ap: Port
+ *
+ * Perform the PATA port setup we need.
+
+ * On the Jmicron 361/363 there is a single PATA port that can be mapped
+ * either as primary or secondary (or neither). We don't do any policy
+ * and setup here. We assume that has been done by init_one and the
+ * BIOS.
+ */
+
+static int jmicron_pre_reset(struct ata_port *ap)
+{
+ struct pci_dev *pdev = to_pci_dev(ap->host_set->dev);
+ u32 control;
+ u32 control5;
+ int port_mask = 1<< (4 * ap->hard_port_no);
+ int port = ap->hard_port_no;
+ port_type port_map[2];
+
+ /* Check if our port is enabled */
+ pci_read_config_dword(pdev, 0x40, &control);
+ if ((control & port_mask) == 0)
+ return 0;
+
+ /* There are two basic mappings. One has the two SATA ports merged
+ as master/slave and the secondary as PATA, the other has only the
+ SATA port mapped */
+ if (control & (1 << 23)) {
+ port_map[0] = PORT_SATA;
+ port_map[1] = PORT_PATA0;
+ } else {
+ port_map[0] = PORT_SATA;
+ port_map[1] = PORT_SATA;
+ }
+
+ /* The 365/366 may have this bit set to map the second PATA port
+ as the internal primary channel */
+ pci_read_config_dword(pdev, 0x80, &control5);
+ if (control5 & (1<<24))
+ port_map[0] = PORT_PATA1;
+
+ /* The two ports may then be logically swapped by the firmware */
+ if (control & (1 << 22))
+ port = port ^ 1;
+
+ /*
+ * Now we know which physical port we are talking about we can
+ * actually do our cable checking etc. Thankfully we don't need
+ * to do the plumbing for other cases.
+ */
+ switch (port_map[port])
+ {
+ case PORT_PATA0:
+ if (control & (1 << 5))
+ return 0;
+ if (control & (1 << 3)) /* 40/80 pin primary */
+ ap->cbl = ATA_CBL_PATA40;
+ else
+ ap->cbl = ATA_CBL_PATA80;
+ break;
+ case PORT_PATA1:
+ /* Bit 21 is set if the port is enabled */
+ if ((control5 & (1 << 21)) == 0)
+ return 0;
+ if (control5 & (1 << 19)) /* 40/80 pin secondary */
+ ap->cbl = ATA_CBL_PATA40;
+ else
+ ap->cbl = ATA_CBL_PATA80;
+ break;
+ case PORT_SATA:
+ ap->cbl = ATA_CBL_SATA;
+ break;
+ }
+ return ata_std_prereset(ap);
+}
+
+/**
+ * jmicron_error_handler - Setup and error handler
+ * @ap: Port to handle
+ *
+ * LOCKING:
+ * None (inherited from caller).
+ */
+
+static void jmicron_error_handler(struct ata_port *ap)
+{
+ return ata_bmdma_drive_eh(ap, jmicron_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
+}
+
+/* No PIO or DMA methods needed for this device */
+
+static struct scsi_host_template jmicron_sht = {
+ .module = THIS_MODULE,
+ .name = DRV_NAME,
+ .ioctl = ata_scsi_ioctl,
+ .queuecommand = ata_scsi_queuecmd,
+ .can_queue = ATA_DEF_QUEUE,
+ .this_id = ATA_SHT_THIS_ID,
+ .sg_tablesize = LIBATA_MAX_PRD,
+ /* Special handling needed if you have sector or LBA48 limits */
+ .max_sectors = ATA_MAX_SECTORS,
+ .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
+ .emulated = ATA_SHT_EMULATED,
+ .use_clustering = ATA_SHT_USE_CLUSTERING,
+ .proc_name = DRV_NAME,
+ .dma_boundary = ATA_DMA_BOUNDARY,
+ .slave_configure = ata_scsi_slave_config,
+ /* Use standard CHS mapping rules */
+ .bios_param = ata_std_bios_param,
+};
+
+static const struct ata_port_operations jmicron_ops = {
+ .port_disable = ata_port_disable,
+
+ /* Task file is PCI ATA format, use helpers */
+ .tf_load = ata_tf_load,
+ .tf_read = ata_tf_read,
+ .check_status = ata_check_status,
+ .exec_command = ata_exec_command,
+ .dev_select = ata_std_dev_select,
+
+ .freeze = ata_bmdma_freeze,
+ .thaw = ata_bmdma_thaw,
+ .error_handler = jmicron_error_handler,
+ .post_internal_cmd = ata_bmdma_post_internal_cmd,
+
+ /* BMDMA handling is PCI ATA format, use helpers */
+ .bmdma_setup = ata_bmdma_setup,
+ .bmdma_start = ata_bmdma_start,
+ .bmdma_stop = ata_bmdma_stop,
+ .bmdma_status = ata_bmdma_status,
+ .qc_prep = ata_qc_prep,
+ .qc_issue = ata_qc_issue_prot,
+ .data_xfer = ata_pio_data_xfer,
+
+ /* Timeout handling. Special recovery hooks here */
+ .eng_timeout = ata_eng_timeout,
+ .irq_handler = ata_interrupt,
+ .irq_clear = ata_bmdma_irq_clear,
+
+ /* Generic PATA PCI ATA helpers */
+ .port_start = ata_port_start,
+ .port_stop = ata_port_stop,
+ .host_stop = ata_host_stop,
+};
+
+
+/**
+ * jmicron_init_one - Register Jmicron ATA PCI device with kernel services
+ * @pdev: PCI device to register
+ * @ent: Entry in jmicron_pci_tbl matching with @pdev
+ *
+ * Called from kernel PCI layer.
+ *
+ * LOCKING:
+ * Inherited from PCI layer (may sleep).
+ *
+ * RETURNS:
+ * Zero on success, or -ERRNO value.
+ */
+
+static int jmicron_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ static struct ata_port_info info = {
+ .sht = &jmicron_sht,
+ .host_flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+
+ .pio_mask = 0x1f,
+ .mwdma_mask = 0x07,
+ .udma_mask = 0x3f,
+
+ .port_ops = &jmicron_ops,
+ };
+ struct ata_port_info *port_info[2] = { &info, &info };
+
+ u32 reg;
+
+ if (id->driver_data != 368) {
+ /* Put the controller into AHCI mode in case the AHCI driver
+ has not yet been loaded. This can be done with either
+ function present */
+
+ /* FIXME: We may want a way to override this in future */
+ pci_write_config_byte(pdev, 0x41, 0xa1);
+ }
+
+ /* PATA controller is fn 1, AHCI is fn 0 */
+ if (PCI_FUNC(pdev->devfn) != 1)
+ return -ENODEV;
+
+ if ( id->driver_data == 365 || id->driver_data == 366) {
+ /* The 365/66 have two PATA channels, redirect the second */
+ pci_read_config_dword(pdev, 0x80, ®);
+ reg |= (1 << 24); /* IDE1 to PATA IDE secondary */
+ pci_write_config_dword(pdev, 0x80, reg);
+ }
+
+ return ata_pci_init_one(pdev, port_info, 2);
+}
+
+static const struct pci_device_id jmicron_pci_tbl[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB361), 361},
+ { PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB363), 363},
+ { PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB365), 365},
+ { PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB366), 366},
+ { PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB368), 368},
+ { } /* terminate list */
+};
+
+static struct pci_driver jmicron_pci_driver = {
+ .name = DRV_NAME,
+ .id_table = jmicron_pci_tbl,
+ .probe = jmicron_init_one,
+ .remove = ata_pci_remove_one,
+};
+
+static int __init jmicron_init(void)
+{
+ return pci_register_driver(&jmicron_pci_driver);
+}
+
+static void __exit jmicron_exit(void)
+{
+ pci_unregister_driver(&jmicron_pci_driver);
+}
+
+module_init(jmicron_init);
+module_exit(jmicron_exit);
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("SCSI low-level driver for Jmicron PATA ports");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl);
+MODULE_VERSION(DRV_VERSION);
+
--
1.2.GIT
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