| /* |
| * pata_qdi.c - QDI VLB ATA controllers |
| * (C) 2006 Red Hat <alan@redhat.com> |
| * |
| * This driver mostly exists as a proof of concept for non PCI devices under |
| * libata. While the QDI6580 was 'neat' in 1993 it is no longer terribly |
| * useful. |
| * |
| * Tuning code written from the documentation at |
| * http://www.ryston.cz/petr/vlb/qd6500.html |
| * http://www.ryston.cz/petr/vlb/qd6580.html |
| * |
| * Probe code based on drivers/ide/legacy/qd65xx.c |
| * Rewritten from the work of Colten Edwards <pje120@cs.usask.ca> by |
| * Samuel Thibault <samuel.thibault@fnac.net> |
| */ |
| |
| #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 <scsi/scsi_host.h> |
| #include <linux/libata.h> |
| #include <linux/platform_device.h> |
| |
| #define DRV_NAME "pata_qdi" |
| #define DRV_VERSION "0.3.1" |
| |
| #define NR_HOST 4 /* Two 6580s */ |
| |
| struct qdi_data { |
| unsigned long timing; |
| u8 clock[2]; |
| u8 last; |
| int fast; |
| struct platform_device *platform_dev; |
| |
| }; |
| |
| static struct ata_host *qdi_host[NR_HOST]; |
| static struct qdi_data qdi_data[NR_HOST]; |
| static int nr_qdi_host; |
| |
| #ifdef MODULE |
| static int probe_qdi = 1; |
| #else |
| static int probe_qdi; |
| #endif |
| |
| static void qdi6500_set_piomode(struct ata_port *ap, struct ata_device *adev) |
| { |
| struct ata_timing t; |
| struct qdi_data *qdi = ap->host->private_data; |
| int active, recovery; |
| u8 timing; |
| |
| /* Get the timing data in cycles */ |
| ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000); |
| |
| if (qdi->fast) { |
| active = 8 - FIT(t.active, 1, 8); |
| recovery = 18 - FIT(t.recover, 3, 18); |
| } else { |
| active = 9 - FIT(t.active, 2, 9); |
| recovery = 15 - FIT(t.recover, 0, 15); |
| } |
| timing = (recovery << 4) | active | 0x08; |
| |
| qdi->clock[adev->devno] = timing; |
| |
| outb(timing, qdi->timing); |
| } |
| |
| static void qdi6580_set_piomode(struct ata_port *ap, struct ata_device *adev) |
| { |
| struct ata_timing t; |
| struct qdi_data *qdi = ap->host->private_data; |
| int active, recovery; |
| u8 timing; |
| |
| /* Get the timing data in cycles */ |
| ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000); |
| |
| if (qdi->fast) { |
| active = 8 - FIT(t.active, 1, 8); |
| recovery = 18 - FIT(t.recover, 3, 18); |
| } else { |
| active = 9 - FIT(t.active, 2, 9); |
| recovery = 15 - FIT(t.recover, 0, 15); |
| } |
| timing = (recovery << 4) | active | 0x08; |
| |
| qdi->clock[adev->devno] = timing; |
| |
| outb(timing, qdi->timing); |
| |
| /* Clear the FIFO */ |
| if (adev->class != ATA_DEV_ATA) |
| outb(0x5F, (qdi->timing & 0xFFF0) + 3); |
| } |
| |
| /** |
| * qdi_qc_issue_prot - command issue |
| * @qc: command pending |
| * |
| * Called when the libata layer is about to issue a command. We wrap |
| * this interface so that we can load the correct ATA timings. |
| */ |
| |
| static unsigned int qdi_qc_issue_prot(struct ata_queued_cmd *qc) |
| { |
| struct ata_port *ap = qc->ap; |
| struct ata_device *adev = qc->dev; |
| struct qdi_data *qdi = ap->host->private_data; |
| |
| if (qdi->clock[adev->devno] != qdi->last) { |
| if (adev->pio_mode) { |
| qdi->last = qdi->clock[adev->devno]; |
| outb(qdi->clock[adev->devno], qdi->timing); |
| } |
| } |
| return ata_qc_issue_prot(qc); |
| } |
| |
| static void qdi_data_xfer(struct ata_device *adev, unsigned char *buf, unsigned int buflen, int write_data) |
| { |
| struct ata_port *ap = adev->link->ap; |
| int slop = buflen & 3; |
| |
| if (ata_id_has_dword_io(adev->id)) { |
| if (write_data) |
| iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2); |
| else |
| ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2); |
| |
| if (unlikely(slop)) { |
| u32 pad; |
| if (write_data) { |
| memcpy(&pad, buf + buflen - slop, slop); |
| pad = le32_to_cpu(pad); |
| iowrite32(pad, ap->ioaddr.data_addr); |
| } else { |
| pad = ioread32(ap->ioaddr.data_addr); |
| pad = cpu_to_le32(pad); |
| memcpy(buf + buflen - slop, &pad, slop); |
| } |
| } |
| } else |
| ata_data_xfer(adev, buf, buflen, write_data); |
| } |
| |
| static struct scsi_host_template qdi_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, |
| .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, |
| .slave_destroy = ata_scsi_slave_destroy, |
| .bios_param = ata_std_bios_param, |
| }; |
| |
| static struct ata_port_operations qdi6500_port_ops = { |
| .set_piomode = qdi6500_set_piomode, |
| |
| .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 = ata_bmdma_error_handler, |
| .post_internal_cmd = ata_bmdma_post_internal_cmd, |
| .cable_detect = ata_cable_40wire, |
| |
| .qc_prep = ata_qc_prep, |
| .qc_issue = qdi_qc_issue_prot, |
| |
| .data_xfer = qdi_data_xfer, |
| |
| .irq_clear = ata_bmdma_irq_clear, |
| .irq_on = ata_irq_on, |
| |
| .port_start = ata_port_start, |
| }; |
| |
| static struct ata_port_operations qdi6580_port_ops = { |
| .set_piomode = qdi6580_set_piomode, |
| |
| .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 = ata_bmdma_error_handler, |
| .post_internal_cmd = ata_bmdma_post_internal_cmd, |
| .cable_detect = ata_cable_40wire, |
| |
| .qc_prep = ata_qc_prep, |
| .qc_issue = qdi_qc_issue_prot, |
| |
| .data_xfer = qdi_data_xfer, |
| |
| .irq_clear = ata_bmdma_irq_clear, |
| .irq_on = ata_irq_on, |
| |
| .port_start = ata_port_start, |
| }; |
| |
| /** |
| * qdi_init_one - attach a qdi interface |
| * @type: Type to display |
| * @io: I/O port start |
| * @irq: interrupt line |
| * @fast: True if on a > 33Mhz VLB |
| * |
| * Register an ISA bus IDE interface. Such interfaces are PIO and we |
| * assume do not support IRQ sharing. |
| */ |
| |
| static __init int qdi_init_one(unsigned long port, int type, unsigned long io, int irq, int fast) |
| { |
| struct platform_device *pdev; |
| struct ata_host *host; |
| struct ata_port *ap; |
| void __iomem *io_addr, *ctl_addr; |
| int ret; |
| |
| /* |
| * Fill in a probe structure first of all |
| */ |
| |
| pdev = platform_device_register_simple(DRV_NAME, nr_qdi_host, NULL, 0); |
| if (IS_ERR(pdev)) |
| return PTR_ERR(pdev); |
| |
| ret = -ENOMEM; |
| io_addr = devm_ioport_map(&pdev->dev, io, 8); |
| ctl_addr = devm_ioport_map(&pdev->dev, io + 0x206, 1); |
| if (!io_addr || !ctl_addr) |
| goto fail; |
| |
| ret = -ENOMEM; |
| host = ata_host_alloc(&pdev->dev, 1); |
| if (!host) |
| goto fail; |
| ap = host->ports[0]; |
| |
| if (type == 6580) { |
| ap->ops = &qdi6580_port_ops; |
| ap->pio_mask = 0x1F; |
| ap->flags |= ATA_FLAG_SLAVE_POSS; |
| } else { |
| ap->ops = &qdi6500_port_ops; |
| ap->pio_mask = 0x07; /* Actually PIO3 !IORDY is possible */ |
| ap->flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_NO_IORDY; |
| } |
| |
| ap->ioaddr.cmd_addr = io_addr; |
| ap->ioaddr.altstatus_addr = ctl_addr; |
| ap->ioaddr.ctl_addr = ctl_addr; |
| ata_std_ports(&ap->ioaddr); |
| |
| /* |
| * Hook in a private data structure per channel |
| */ |
| ap->private_data = &qdi_data[nr_qdi_host]; |
| |
| qdi_data[nr_qdi_host].timing = port; |
| qdi_data[nr_qdi_host].fast = fast; |
| qdi_data[nr_qdi_host].platform_dev = pdev; |
| |
| printk(KERN_INFO DRV_NAME": qd%d at 0x%lx.\n", type, io); |
| |
| /* activate */ |
| ret = ata_host_activate(host, irq, ata_interrupt, 0, &qdi_sht); |
| if (ret) |
| goto fail; |
| |
| qdi_host[nr_qdi_host++] = dev_get_drvdata(&pdev->dev); |
| return 0; |
| |
| fail: |
| platform_device_unregister(pdev); |
| return ret; |
| } |
| |
| /** |
| * qdi_init - attach qdi interfaces |
| * |
| * Attach qdi IDE interfaces by scanning the ports it may occupy. |
| */ |
| |
| static __init int qdi_init(void) |
| { |
| unsigned long flags; |
| static const unsigned long qd_port[2] = { 0x30, 0xB0 }; |
| static const unsigned long ide_port[2] = { 0x170, 0x1F0 }; |
| static const int ide_irq[2] = { 14, 15 }; |
| |
| int ct = 0; |
| int i; |
| |
| if (probe_qdi == 0) |
| return -ENODEV; |
| |
| /* |
| * Check each possible QD65xx base address |
| */ |
| |
| for (i = 0; i < 2; i++) { |
| unsigned long port = qd_port[i]; |
| u8 r, res; |
| |
| |
| if (request_region(port, 2, "pata_qdi")) { |
| /* Check for a card */ |
| local_irq_save(flags); |
| r = inb_p(port); |
| outb_p(0x19, port); |
| res = inb_p(port); |
| outb_p(r, port); |
| local_irq_restore(flags); |
| |
| /* Fail */ |
| if (res == 0x19) |
| { |
| release_region(port, 2); |
| continue; |
| } |
| |
| /* Passes the presence test */ |
| r = inb_p(port + 1); /* Check port agrees with port set */ |
| if ((r & 2) >> 1 != i) { |
| release_region(port, 2); |
| continue; |
| } |
| |
| /* Check card type */ |
| if ((r & 0xF0) == 0xC0) { |
| /* QD6500: single channel */ |
| if (r & 8) { |
| /* Disabled ? */ |
| release_region(port, 2); |
| continue; |
| } |
| if (qdi_init_one(port, 6500, ide_port[r & 0x01], ide_irq[r & 0x01], r & 0x04) == 0) |
| ct++; |
| } |
| if (((r & 0xF0) == 0xA0) || (r & 0xF0) == 0x50) { |
| /* QD6580: dual channel */ |
| if (!request_region(port + 2 , 2, "pata_qdi")) |
| { |
| release_region(port, 2); |
| continue; |
| } |
| res = inb(port + 3); |
| if (res & 1) { |
| /* Single channel mode */ |
| if (qdi_init_one(port, 6580, ide_port[r & 0x01], ide_irq[r & 0x01], r & 0x04) == 0) |
| ct++; |
| } else { |
| /* Dual channel mode */ |
| if (qdi_init_one(port, 6580, 0x1F0, 14, r & 0x04) == 0) |
| ct++; |
| if (qdi_init_one(port + 2, 6580, 0x170, 15, r & 0x04) == 0) |
| ct++; |
| } |
| } |
| } |
| } |
| if (ct != 0) |
| return 0; |
| return -ENODEV; |
| } |
| |
| static __exit void qdi_exit(void) |
| { |
| int i; |
| |
| for (i = 0; i < nr_qdi_host; i++) { |
| ata_host_detach(qdi_host[i]); |
| /* Free the control resource. The 6580 dual channel has the resources |
| * claimed as a pair of 2 byte resources so we need no special cases... |
| */ |
| release_region(qdi_data[i].timing, 2); |
| platform_device_unregister(qdi_data[i].platform_dev); |
| } |
| } |
| |
| MODULE_AUTHOR("Alan Cox"); |
| MODULE_DESCRIPTION("low-level driver for qdi ATA"); |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION(DRV_VERSION); |
| |
| module_init(qdi_init); |
| module_exit(qdi_exit); |
| |
| module_param(probe_qdi, int, 0); |
| |