afdfe899e6
Many LLDs are missing sht->slave_destroy. The method is mandatory to support device warm unplugging (echo 1 > /sys/.../delete). Without it, libata might access released scsi device. Signed-off-by: Tejun Heo <htejun@gmail.com>
267 lines
6.9 KiB
C
267 lines
6.9 KiB
C
/*
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* pata_jmicron.c - JMicron ATA driver for non AHCI mode. This drives the
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* PATA port of the controller. The SATA ports are
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* driven by AHCI in the usual configuration although
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* this driver can handle other setups if we need it.
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*
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* (c) 2006 Red Hat <alan@redhat.com>
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <linux/blkdev.h>
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <scsi/scsi_host.h>
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#include <linux/libata.h>
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#include <linux/ata.h>
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#define DRV_NAME "pata_jmicron"
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#define DRV_VERSION "0.1.2"
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typedef enum {
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PORT_PATA0 = 0,
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PORT_PATA1 = 1,
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PORT_SATA = 2,
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} port_type;
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/**
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* jmicron_pre_reset - check for 40/80 pin
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* @ap: Port
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*
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* Perform the PATA port setup we need.
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* On the Jmicron 361/363 there is a single PATA port that can be mapped
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* either as primary or secondary (or neither). We don't do any policy
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* and setup here. We assume that has been done by init_one and the
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* BIOS.
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*/
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static int jmicron_pre_reset(struct ata_port *ap)
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{
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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u32 control;
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u32 control5;
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int port_mask = 1<< (4 * ap->port_no);
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int port = ap->port_no;
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port_type port_map[2];
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/* Check if our port is enabled */
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pci_read_config_dword(pdev, 0x40, &control);
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if ((control & port_mask) == 0)
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return -ENOENT;
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/* There are two basic mappings. One has the two SATA ports merged
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as master/slave and the secondary as PATA, the other has only the
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SATA port mapped */
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if (control & (1 << 23)) {
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port_map[0] = PORT_SATA;
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port_map[1] = PORT_PATA0;
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} else {
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port_map[0] = PORT_SATA;
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port_map[1] = PORT_SATA;
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}
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/* The 365/366 may have this bit set to map the second PATA port
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as the internal primary channel */
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pci_read_config_dword(pdev, 0x80, &control5);
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if (control5 & (1<<24))
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port_map[0] = PORT_PATA1;
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/* The two ports may then be logically swapped by the firmware */
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if (control & (1 << 22))
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port = port ^ 1;
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/*
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* Now we know which physical port we are talking about we can
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* actually do our cable checking etc. Thankfully we don't need
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* to do the plumbing for other cases.
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*/
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switch (port_map[port])
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{
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case PORT_PATA0:
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if (control & (1 << 5))
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return 0;
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if (control & (1 << 3)) /* 40/80 pin primary */
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ap->cbl = ATA_CBL_PATA40;
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else
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ap->cbl = ATA_CBL_PATA80;
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break;
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case PORT_PATA1:
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/* Bit 21 is set if the port is enabled */
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if ((control5 & (1 << 21)) == 0)
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return 0;
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if (control5 & (1 << 19)) /* 40/80 pin secondary */
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ap->cbl = ATA_CBL_PATA40;
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else
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ap->cbl = ATA_CBL_PATA80;
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break;
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case PORT_SATA:
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ap->cbl = ATA_CBL_SATA;
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break;
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}
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return ata_std_prereset(ap);
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}
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/**
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* jmicron_error_handler - Setup and error handler
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* @ap: Port to handle
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*
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* LOCKING:
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* None (inherited from caller).
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*/
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static void jmicron_error_handler(struct ata_port *ap)
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{
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return ata_bmdma_drive_eh(ap, jmicron_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
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}
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/* No PIO or DMA methods needed for this device */
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static struct scsi_host_template jmicron_sht = {
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.module = THIS_MODULE,
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.name = DRV_NAME,
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.ioctl = ata_scsi_ioctl,
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.queuecommand = ata_scsi_queuecmd,
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.can_queue = ATA_DEF_QUEUE,
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.this_id = ATA_SHT_THIS_ID,
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.sg_tablesize = LIBATA_MAX_PRD,
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/* Special handling needed if you have sector or LBA48 limits */
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.max_sectors = ATA_MAX_SECTORS,
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.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
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.emulated = ATA_SHT_EMULATED,
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.use_clustering = ATA_SHT_USE_CLUSTERING,
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.proc_name = DRV_NAME,
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.dma_boundary = ATA_DMA_BOUNDARY,
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.slave_configure = ata_scsi_slave_config,
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.slave_destroy = ata_scsi_slave_destroy,
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/* Use standard CHS mapping rules */
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.bios_param = ata_std_bios_param,
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};
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static const struct ata_port_operations jmicron_ops = {
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.port_disable = ata_port_disable,
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/* Task file is PCI ATA format, use helpers */
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.tf_load = ata_tf_load,
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.tf_read = ata_tf_read,
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.check_status = ata_check_status,
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.exec_command = ata_exec_command,
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.dev_select = ata_std_dev_select,
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.freeze = ata_bmdma_freeze,
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.thaw = ata_bmdma_thaw,
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.error_handler = jmicron_error_handler,
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.post_internal_cmd = ata_bmdma_post_internal_cmd,
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/* BMDMA handling is PCI ATA format, use helpers */
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.bmdma_setup = ata_bmdma_setup,
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.bmdma_start = ata_bmdma_start,
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.bmdma_stop = ata_bmdma_stop,
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.bmdma_status = ata_bmdma_status,
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.qc_prep = ata_qc_prep,
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.qc_issue = ata_qc_issue_prot,
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.data_xfer = ata_pio_data_xfer,
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/* IRQ-related hooks */
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.irq_handler = ata_interrupt,
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.irq_clear = ata_bmdma_irq_clear,
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/* Generic PATA PCI ATA helpers */
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.port_start = ata_port_start,
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.port_stop = ata_port_stop,
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.host_stop = ata_host_stop,
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};
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/**
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* jmicron_init_one - Register Jmicron ATA PCI device with kernel services
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* @pdev: PCI device to register
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* @ent: Entry in jmicron_pci_tbl matching with @pdev
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*
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* Called from kernel PCI layer.
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*
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* LOCKING:
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* Inherited from PCI layer (may sleep).
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*
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* RETURNS:
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* Zero on success, or -ERRNO value.
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*/
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static int jmicron_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
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{
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static struct ata_port_info info = {
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.sht = &jmicron_sht,
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.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
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.pio_mask = 0x1f,
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.mwdma_mask = 0x07,
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.udma_mask = 0x3f,
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.port_ops = &jmicron_ops,
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};
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struct ata_port_info *port_info[2] = { &info, &info };
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u32 reg;
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if (id->driver_data != 368) {
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/* Put the controller into AHCI mode in case the AHCI driver
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has not yet been loaded. This can be done with either
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function present */
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/* FIXME: We may want a way to override this in future */
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pci_write_config_byte(pdev, 0x41, 0xa1);
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}
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/* PATA controller is fn 1, AHCI is fn 0 */
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if (PCI_FUNC(pdev->devfn) != 1)
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return -ENODEV;
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if ( id->driver_data == 365 || id->driver_data == 366) {
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/* The 365/66 have two PATA channels, redirect the second */
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pci_read_config_dword(pdev, 0x80, ®);
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reg |= (1 << 24); /* IDE1 to PATA IDE secondary */
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pci_write_config_dword(pdev, 0x80, reg);
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}
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return ata_pci_init_one(pdev, port_info, 2);
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}
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static const struct pci_device_id jmicron_pci_tbl[] = {
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{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB361), 361},
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{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB363), 363},
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{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB365), 365},
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{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB366), 366},
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{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB368), 368},
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{ } /* terminate list */
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};
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static struct pci_driver jmicron_pci_driver = {
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.name = DRV_NAME,
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.id_table = jmicron_pci_tbl,
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.probe = jmicron_init_one,
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.remove = ata_pci_remove_one,
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};
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static int __init jmicron_init(void)
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{
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return pci_register_driver(&jmicron_pci_driver);
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}
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static void __exit jmicron_exit(void)
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{
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pci_unregister_driver(&jmicron_pci_driver);
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}
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module_init(jmicron_init);
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module_exit(jmicron_exit);
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MODULE_AUTHOR("Alan Cox");
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MODULE_DESCRIPTION("SCSI low-level driver for Jmicron PATA ports");
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MODULE_LICENSE("GPL");
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MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl);
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MODULE_VERSION(DRV_VERSION);
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