| /* |
| * Generic platform device PATA driver |
| * |
| * Copyright (C) 2006 - 2007 Paul Mundt |
| * |
| * Based on pata_pcmcia: |
| * |
| * Copyright 2005-2006 Red Hat Inc <alan@redhat.com>, all rights reserved. |
| * |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file "COPYING" in the main directory of this archive |
| * for more details. |
| */ |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/blkdev.h> |
| #include <scsi/scsi_host.h> |
| #include <linux/ata.h> |
| #include <linux/libata.h> |
| #include <linux/platform_device.h> |
| #include <linux/pata_platform.h> |
| |
| #define DRV_NAME "pata_platform" |
| #define DRV_VERSION "1.2" |
| |
| static int pio_mask = 1; |
| |
| /* |
| * Provide our own set_mode() as we don't want to change anything that has |
| * already been configured.. |
| */ |
| static int pata_platform_set_mode(struct ata_link *link, struct ata_device **unused) |
| { |
| struct ata_device *dev; |
| |
| ata_link_for_each_dev(dev, link) { |
| if (ata_dev_enabled(dev)) { |
| /* We don't really care */ |
| dev->pio_mode = dev->xfer_mode = XFER_PIO_0; |
| dev->xfer_shift = ATA_SHIFT_PIO; |
| dev->flags |= ATA_DFLAG_PIO; |
| ata_dev_printk(dev, KERN_INFO, "configured for PIO\n"); |
| } |
| } |
| return 0; |
| } |
| |
| static int ata_dummy_ret0(struct ata_port *ap) { return 0; } |
| |
| static struct scsi_host_template pata_platform_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 pata_platform_port_ops = { |
| .set_mode = pata_platform_set_mode, |
| |
| .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_unknown, |
| |
| .qc_prep = ata_qc_prep, |
| .qc_issue = ata_qc_issue_prot, |
| |
| .data_xfer = ata_data_xfer_noirq, |
| |
| .irq_clear = ata_bmdma_irq_clear, |
| .irq_on = ata_irq_on, |
| |
| .port_start = ata_dummy_ret0, |
| }; |
| |
| static void pata_platform_setup_port(struct ata_ioports *ioaddr, |
| struct pata_platform_info *info) |
| { |
| unsigned int shift = 0; |
| |
| /* Fixup the port shift for platforms that need it */ |
| if (info && info->ioport_shift) |
| shift = info->ioport_shift; |
| |
| ioaddr->data_addr = ioaddr->cmd_addr + (ATA_REG_DATA << shift); |
| ioaddr->error_addr = ioaddr->cmd_addr + (ATA_REG_ERR << shift); |
| ioaddr->feature_addr = ioaddr->cmd_addr + (ATA_REG_FEATURE << shift); |
| ioaddr->nsect_addr = ioaddr->cmd_addr + (ATA_REG_NSECT << shift); |
| ioaddr->lbal_addr = ioaddr->cmd_addr + (ATA_REG_LBAL << shift); |
| ioaddr->lbam_addr = ioaddr->cmd_addr + (ATA_REG_LBAM << shift); |
| ioaddr->lbah_addr = ioaddr->cmd_addr + (ATA_REG_LBAH << shift); |
| ioaddr->device_addr = ioaddr->cmd_addr + (ATA_REG_DEVICE << shift); |
| ioaddr->status_addr = ioaddr->cmd_addr + (ATA_REG_STATUS << shift); |
| ioaddr->command_addr = ioaddr->cmd_addr + (ATA_REG_CMD << shift); |
| } |
| |
| /** |
| * pata_platform_probe - attach a platform interface |
| * @pdev: platform device |
| * |
| * Register a platform bus IDE interface. Such interfaces are PIO and we |
| * assume do not support IRQ sharing. |
| * |
| * Platform devices are expected to contain at least 2 resources per port: |
| * |
| * - I/O Base (IORESOURCE_IO or IORESOURCE_MEM) |
| * - CTL Base (IORESOURCE_IO or IORESOURCE_MEM) |
| * |
| * and optionally: |
| * |
| * - IRQ (IORESOURCE_IRQ) |
| * |
| * If the base resources are both mem types, the ioremap() is handled |
| * here. For IORESOURCE_IO, it's assumed that there's no remapping |
| * necessary. |
| * |
| * If no IRQ resource is present, PIO polling mode is used instead. |
| */ |
| static int __devinit pata_platform_probe(struct platform_device *pdev) |
| { |
| struct resource *io_res, *ctl_res; |
| struct ata_host *host; |
| struct ata_port *ap; |
| struct pata_platform_info *pp_info; |
| unsigned int mmio; |
| int irq; |
| |
| /* |
| * Simple resource validation .. |
| */ |
| if ((pdev->num_resources != 3) && (pdev->num_resources != 2)) { |
| dev_err(&pdev->dev, "invalid number of resources\n"); |
| return -EINVAL; |
| } |
| |
| /* |
| * Get the I/O base first |
| */ |
| io_res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
| if (io_res == NULL) { |
| io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| if (unlikely(io_res == NULL)) |
| return -EINVAL; |
| } |
| |
| /* |
| * Then the CTL base |
| */ |
| ctl_res = platform_get_resource(pdev, IORESOURCE_IO, 1); |
| if (ctl_res == NULL) { |
| ctl_res = platform_get_resource(pdev, IORESOURCE_MEM, 1); |
| if (unlikely(ctl_res == NULL)) |
| return -EINVAL; |
| } |
| |
| /* |
| * Check for MMIO |
| */ |
| mmio = (( io_res->flags == IORESOURCE_MEM) && |
| (ctl_res->flags == IORESOURCE_MEM)); |
| |
| /* |
| * And the IRQ |
| */ |
| irq = platform_get_irq(pdev, 0); |
| if (irq < 0) |
| irq = 0; /* no irq */ |
| |
| /* |
| * Now that that's out of the way, wire up the port.. |
| */ |
| host = ata_host_alloc(&pdev->dev, 1); |
| if (!host) |
| return -ENOMEM; |
| ap = host->ports[0]; |
| |
| ap->ops = &pata_platform_port_ops; |
| ap->pio_mask = pio_mask; |
| ap->flags |= ATA_FLAG_SLAVE_POSS; |
| |
| /* |
| * Use polling mode if there's no IRQ |
| */ |
| if (!irq) { |
| ap->flags |= ATA_FLAG_PIO_POLLING; |
| ata_port_desc(ap, "no IRQ, using PIO polling"); |
| } |
| |
| /* |
| * Handle the MMIO case |
| */ |
| if (mmio) { |
| ap->ioaddr.cmd_addr = devm_ioremap(&pdev->dev, io_res->start, |
| io_res->end - io_res->start + 1); |
| ap->ioaddr.ctl_addr = devm_ioremap(&pdev->dev, ctl_res->start, |
| ctl_res->end - ctl_res->start + 1); |
| } else { |
| ap->ioaddr.cmd_addr = devm_ioport_map(&pdev->dev, io_res->start, |
| io_res->end - io_res->start + 1); |
| ap->ioaddr.ctl_addr = devm_ioport_map(&pdev->dev, ctl_res->start, |
| ctl_res->end - ctl_res->start + 1); |
| } |
| if (!ap->ioaddr.cmd_addr || !ap->ioaddr.ctl_addr) { |
| dev_err(&pdev->dev, "failed to map IO/CTL base\n"); |
| return -ENOMEM; |
| } |
| |
| ap->ioaddr.altstatus_addr = ap->ioaddr.ctl_addr; |
| |
| pp_info = pdev->dev.platform_data; |
| pata_platform_setup_port(&ap->ioaddr, pp_info); |
| |
| ata_port_desc(ap, "%s cmd 0x%llx ctl 0x%llx", mmio ? "mmio" : "ioport", |
| (unsigned long long)io_res->start, |
| (unsigned long long)ctl_res->start); |
| |
| /* activate */ |
| return ata_host_activate(host, irq, irq ? ata_interrupt : NULL, |
| pp_info ? pp_info->irq_flags : 0, |
| &pata_platform_sht); |
| } |
| |
| /** |
| * pata_platform_remove - unplug a platform interface |
| * @pdev: platform device |
| * |
| * A platform bus ATA device has been unplugged. Perform the needed |
| * cleanup. Also called on module unload for any active devices. |
| */ |
| static int __devexit pata_platform_remove(struct platform_device *pdev) |
| { |
| struct device *dev = &pdev->dev; |
| struct ata_host *host = dev_get_drvdata(dev); |
| |
| ata_host_detach(host); |
| |
| return 0; |
| } |
| |
| static struct platform_driver pata_platform_driver = { |
| .probe = pata_platform_probe, |
| .remove = __devexit_p(pata_platform_remove), |
| .driver = { |
| .name = DRV_NAME, |
| .owner = THIS_MODULE, |
| }, |
| }; |
| |
| static int __init pata_platform_init(void) |
| { |
| return platform_driver_register(&pata_platform_driver); |
| } |
| |
| static void __exit pata_platform_exit(void) |
| { |
| platform_driver_unregister(&pata_platform_driver); |
| } |
| module_init(pata_platform_init); |
| module_exit(pata_platform_exit); |
| |
| module_param(pio_mask, int, 0); |
| |
| MODULE_AUTHOR("Paul Mundt"); |
| MODULE_DESCRIPTION("low-level driver for platform device ATA"); |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION(DRV_VERSION); |