diff options
Diffstat (limited to 'drivers/scsi/sata_vsc.c')
| -rw-r--r-- | drivers/scsi/sata_vsc.c | 482 |
1 files changed, 0 insertions, 482 deletions
diff --git a/drivers/scsi/sata_vsc.c b/drivers/scsi/sata_vsc.c deleted file mode 100644 index ad37871594f..00000000000 --- a/drivers/scsi/sata_vsc.c +++ /dev/null @@ -1,482 +0,0 @@ -/* - * sata_vsc.c - Vitesse VSC7174 4 port DPA SATA - * - * Maintained by: Jeremy Higdon @ SGI - * Please ALWAYS copy linux-ide@vger.kernel.org - * on emails. - * - * Copyright 2004 SGI - * - * Bits from Jeff Garzik, Copyright RedHat, Inc. - * - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; see the file COPYING. If not, write to - * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. - * - * - * libata documentation is available via 'make {ps|pdf}docs', - * as Documentation/DocBook/libata.* - * - * Vitesse hardware documentation presumably available under NDA. - * Intel 31244 (same hardware interface) documentation presumably - * available from http://developer.intel.com/ - * - */ - -#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/interrupt.h> -#include <linux/dma-mapping.h> -#include <linux/device.h> -#include <scsi/scsi_host.h> -#include <linux/libata.h> - -#define DRV_NAME "sata_vsc" -#define DRV_VERSION "2.0" - -enum { - /* Interrupt register offsets (from chip base address) */ - VSC_SATA_INT_STAT_OFFSET = 0x00, - VSC_SATA_INT_MASK_OFFSET = 0x04, - - /* Taskfile registers offsets */ - VSC_SATA_TF_CMD_OFFSET = 0x00, - VSC_SATA_TF_DATA_OFFSET = 0x00, - VSC_SATA_TF_ERROR_OFFSET = 0x04, - VSC_SATA_TF_FEATURE_OFFSET = 0x06, - VSC_SATA_TF_NSECT_OFFSET = 0x08, - VSC_SATA_TF_LBAL_OFFSET = 0x0c, - VSC_SATA_TF_LBAM_OFFSET = 0x10, - VSC_SATA_TF_LBAH_OFFSET = 0x14, - VSC_SATA_TF_DEVICE_OFFSET = 0x18, - VSC_SATA_TF_STATUS_OFFSET = 0x1c, - VSC_SATA_TF_COMMAND_OFFSET = 0x1d, - VSC_SATA_TF_ALTSTATUS_OFFSET = 0x28, - VSC_SATA_TF_CTL_OFFSET = 0x29, - - /* DMA base */ - VSC_SATA_UP_DESCRIPTOR_OFFSET = 0x64, - VSC_SATA_UP_DATA_BUFFER_OFFSET = 0x6C, - VSC_SATA_DMA_CMD_OFFSET = 0x70, - - /* SCRs base */ - VSC_SATA_SCR_STATUS_OFFSET = 0x100, - VSC_SATA_SCR_ERROR_OFFSET = 0x104, - VSC_SATA_SCR_CONTROL_OFFSET = 0x108, - - /* Port stride */ - VSC_SATA_PORT_OFFSET = 0x200, - - /* Error interrupt status bit offsets */ - VSC_SATA_INT_ERROR_CRC = 0x40, - VSC_SATA_INT_ERROR_T = 0x20, - VSC_SATA_INT_ERROR_P = 0x10, - VSC_SATA_INT_ERROR_R = 0x8, - VSC_SATA_INT_ERROR_E = 0x4, - VSC_SATA_INT_ERROR_M = 0x2, - VSC_SATA_INT_PHY_CHANGE = 0x1, - VSC_SATA_INT_ERROR = (VSC_SATA_INT_ERROR_CRC | VSC_SATA_INT_ERROR_T | \ - VSC_SATA_INT_ERROR_P | VSC_SATA_INT_ERROR_R | \ - VSC_SATA_INT_ERROR_E | VSC_SATA_INT_ERROR_M | \ - VSC_SATA_INT_PHY_CHANGE), -}; - - -#define is_vsc_sata_int_err(port_idx, int_status) \ - (int_status & (VSC_SATA_INT_ERROR << (8 * port_idx))) - - -static u32 vsc_sata_scr_read (struct ata_port *ap, unsigned int sc_reg) -{ - if (sc_reg > SCR_CONTROL) - return 0xffffffffU; - return readl((void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4)); -} - - -static void vsc_sata_scr_write (struct ata_port *ap, unsigned int sc_reg, - u32 val) -{ - if (sc_reg > SCR_CONTROL) - return; - writel(val, (void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4)); -} - - -static void vsc_intr_mask_update(struct ata_port *ap, u8 ctl) -{ - void __iomem *mask_addr; - u8 mask; - - mask_addr = ap->host_set->mmio_base + - VSC_SATA_INT_MASK_OFFSET + ap->port_no; - mask = readb(mask_addr); - if (ctl & ATA_NIEN) - mask |= 0x80; - else - mask &= 0x7F; - writeb(mask, mask_addr); -} - - -static void vsc_sata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf) -{ - struct ata_ioports *ioaddr = &ap->ioaddr; - unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR; - - /* - * The only thing the ctl register is used for is SRST. - * That is not enabled or disabled via tf_load. - * However, if ATA_NIEN is changed, then we need to change the interrupt register. - */ - if ((tf->ctl & ATA_NIEN) != (ap->last_ctl & ATA_NIEN)) { - ap->last_ctl = tf->ctl; - vsc_intr_mask_update(ap, tf->ctl & ATA_NIEN); - } - if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) { - writew(tf->feature | (((u16)tf->hob_feature) << 8), ioaddr->feature_addr); - writew(tf->nsect | (((u16)tf->hob_nsect) << 8), ioaddr->nsect_addr); - writew(tf->lbal | (((u16)tf->hob_lbal) << 8), ioaddr->lbal_addr); - writew(tf->lbam | (((u16)tf->hob_lbam) << 8), ioaddr->lbam_addr); - writew(tf->lbah | (((u16)tf->hob_lbah) << 8), ioaddr->lbah_addr); - } else if (is_addr) { - writew(tf->feature, ioaddr->feature_addr); - writew(tf->nsect, ioaddr->nsect_addr); - writew(tf->lbal, ioaddr->lbal_addr); - writew(tf->lbam, ioaddr->lbam_addr); - writew(tf->lbah, ioaddr->lbah_addr); - } - - if (tf->flags & ATA_TFLAG_DEVICE) - writeb(tf->device, ioaddr->device_addr); - - ata_wait_idle(ap); -} - - -static void vsc_sata_tf_read(struct ata_port *ap, struct ata_taskfile *tf) -{ - struct ata_ioports *ioaddr = &ap->ioaddr; - u16 nsect, lbal, lbam, lbah, feature; - - tf->command = ata_check_status(ap); - tf->device = readw(ioaddr->device_addr); - feature = readw(ioaddr->error_addr); - nsect = readw(ioaddr->nsect_addr); - lbal = readw(ioaddr->lbal_addr); - lbam = readw(ioaddr->lbam_addr); - lbah = readw(ioaddr->lbah_addr); - - tf->feature = feature; - tf->nsect = nsect; - tf->lbal = lbal; - tf->lbam = lbam; - tf->lbah = lbah; - - if (tf->flags & ATA_TFLAG_LBA48) { - tf->hob_feature = feature >> 8; - tf->hob_nsect = nsect >> 8; - tf->hob_lbal = lbal >> 8; - tf->hob_lbam = lbam >> 8; - tf->hob_lbah = lbah >> 8; - } -} - - -/* - * vsc_sata_interrupt - * - * Read the interrupt register and process for the devices that have them pending. - */ -static irqreturn_t vsc_sata_interrupt (int irq, void *dev_instance, - struct pt_regs *regs) -{ - struct ata_host_set *host_set = dev_instance; - unsigned int i; - unsigned int handled = 0; - u32 int_status; - - spin_lock(&host_set->lock); - - int_status = readl(host_set->mmio_base + VSC_SATA_INT_STAT_OFFSET); - - for (i = 0; i < host_set->n_ports; i++) { - if (int_status & ((u32) 0xFF << (8 * i))) { - struct ata_port *ap; - - ap = host_set->ports[i]; - - if (is_vsc_sata_int_err(i, int_status)) { - u32 err_status; - printk(KERN_DEBUG "%s: ignoring interrupt(s)\n", __FUNCTION__); - err_status = ap ? vsc_sata_scr_read(ap, SCR_ERROR) : 0; - vsc_sata_scr_write(ap, SCR_ERROR, err_status); - handled++; - } - - if (ap && !(ap->flags & ATA_FLAG_DISABLED)) { - struct ata_queued_cmd *qc; - - qc = ata_qc_from_tag(ap, ap->active_tag); - if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) - handled += ata_host_intr(ap, qc); - else if (is_vsc_sata_int_err(i, int_status)) { - /* - * On some chips (i.e. Intel 31244), an error - * interrupt will sneak in at initialization - * time (phy state changes). Clearing the SCR - * error register is not required, but it prevents - * the phy state change interrupts from recurring - * later. - */ - u32 err_status; - err_status = vsc_sata_scr_read(ap, SCR_ERROR); - printk(KERN_DEBUG "%s: clearing interrupt, " - "status %x; sata err status %x\n", - __FUNCTION__, - int_status, err_status); - vsc_sata_scr_write(ap, SCR_ERROR, err_status); - /* Clear interrupt status */ - ata_chk_status(ap); - handled++; - } - } - } - } - - spin_unlock(&host_set->lock); - - return IRQ_RETVAL(handled); -} - - -static struct scsi_host_template vsc_sata_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 const struct ata_port_operations vsc_sata_ops = { - .port_disable = ata_port_disable, - .tf_load = vsc_sata_tf_load, - .tf_read = vsc_sata_tf_read, - .exec_command = ata_exec_command, - .check_status = ata_check_status, - .dev_select = ata_std_dev_select, - .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_mmio_data_xfer, - .freeze = ata_bmdma_freeze, - .thaw = ata_bmdma_thaw, - .error_handler = ata_bmdma_error_handler, - .post_internal_cmd = ata_bmdma_post_internal_cmd, - .irq_handler = vsc_sata_interrupt, - .irq_clear = ata_bmdma_irq_clear, - .scr_read = vsc_sata_scr_read, - .scr_write = vsc_sata_scr_write, - .port_start = ata_port_start, - .port_stop = ata_port_stop, - .host_stop = ata_pci_host_stop, -}; - -static void __devinit vsc_sata_setup_port(struct ata_ioports *port, unsigned long base) -{ - port->cmd_addr = base + VSC_SATA_TF_CMD_OFFSET; - port->data_addr = base + VSC_SATA_TF_DATA_OFFSET; - port->error_addr = base + VSC_SATA_TF_ERROR_OFFSET; - port->feature_addr = base + VSC_SATA_TF_FEATURE_OFFSET; - port->nsect_addr = base + VSC_SATA_TF_NSECT_OFFSET; - port->lbal_addr = base + VSC_SATA_TF_LBAL_OFFSET; - port->lbam_addr = base + VSC_SATA_TF_LBAM_OFFSET; - port->lbah_addr = base + VSC_SATA_TF_LBAH_OFFSET; - port->device_addr = base + VSC_SATA_TF_DEVICE_OFFSET; - port->status_addr = base + VSC_SATA_TF_STATUS_OFFSET; - port->command_addr = base + VSC_SATA_TF_COMMAND_OFFSET; - port->altstatus_addr = base + VSC_SATA_TF_ALTSTATUS_OFFSET; - port->ctl_addr = base + VSC_SATA_TF_CTL_OFFSET; - port->bmdma_addr = base + VSC_SATA_DMA_CMD_OFFSET; - port->scr_addr = base + VSC_SATA_SCR_STATUS_OFFSET; - writel(0, base + VSC_SATA_UP_DESCRIPTOR_OFFSET); - writel(0, base + VSC_SATA_UP_DATA_BUFFER_OFFSET); -} - - -static int __devinit vsc_sata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) -{ - static int printed_version; - struct ata_probe_ent *probe_ent = NULL; - unsigned long base; - int pci_dev_busy = 0; - void __iomem *mmio_base; - int rc; - - if (!printed_version++) - dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n"); - - rc = pci_enable_device(pdev); - if (rc) - return rc; - - /* - * Check if we have needed resource mapped. - */ - if (pci_resource_len(pdev, 0) == 0) { - rc = -ENODEV; - goto err_out; - } - - rc = pci_request_regions(pdev, DRV_NAME); - if (rc) { - pci_dev_busy = 1; - goto err_out; - } - - /* - * Use 32 bit DMA mask, because 64 bit address support is poor. - */ - rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK); - if (rc) - goto err_out_regions; - rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); - if (rc) - goto err_out_regions; - - probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL); - if (probe_ent == NULL) { - rc = -ENOMEM; - goto err_out_regions; - } - memset(probe_ent, 0, sizeof(*probe_ent)); - probe_ent->dev = pci_dev_to_dev(pdev); - INIT_LIST_HEAD(&probe_ent->node); - - mmio_base = pci_iomap(pdev, 0, 0); - if (mmio_base == NULL) { - rc = -ENOMEM; - goto err_out_free_ent; - } - base = (unsigned long) mmio_base; - - /* - * Due to a bug in the chip, the default cache line size can't be used - */ - pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, 0x80); - - probe_ent->sht = &vsc_sata_sht; - probe_ent->host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | - ATA_FLAG_MMIO; - probe_ent->port_ops = &vsc_sata_ops; - probe_ent->n_ports = 4; - probe_ent->irq = pdev->irq; - probe_ent->irq_flags = IRQF_SHARED; - probe_ent->mmio_base = mmio_base; - - /* We don't care much about the PIO/UDMA masks, but the core won't like us - * if we don't fill these - */ - probe_ent->pio_mask = 0x1f; - probe_ent->mwdma_mask = 0x07; - probe_ent->udma_mask = 0x7f; - - /* We have 4 ports per PCI function */ - vsc_sata_setup_port(&probe_ent->port[0], base + 1 * VSC_SATA_PORT_OFFSET); - vsc_sata_setup_port(&probe_ent->port[1], base + 2 * VSC_SATA_PORT_OFFSET); - vsc_sata_setup_port(&probe_ent->port[2], base + 3 * VSC_SATA_PORT_OFFSET); - vsc_sata_setup_port(&probe_ent->port[3], base + 4 * VSC_SATA_PORT_OFFSET); - - pci_set_master(pdev); - - /* - * Config offset 0x98 is "Extended Control and Status Register 0" - * Default value is (1 << 28). All bits except bit 28 are reserved in - * DPA mode. If bit 28 is set, LED 0 reflects all ports' activity. - * If bit 28 is clear, each port has its own LED. - */ - pci_write_config_dword(pdev, 0x98, 0); - - /* FIXME: check ata_device_add return value */ - ata_device_add(probe_ent); - kfree(probe_ent); - - return 0; - -err_out_free_ent: - kfree(probe_ent); -err_out_regions: - pci_release_regions(pdev); -err_out: - if (!pci_dev_busy) - pci_disable_device(pdev); - return rc; -} - - -static const struct pci_device_id vsc_sata_pci_tbl[] = { - { PCI_VENDOR_ID_VITESSE, 0x7174, - PCI_ANY_ID, PCI_ANY_ID, 0x10600, 0xFFFFFF, 0 }, - { PCI_VENDOR_ID_INTEL, 0x3200, - PCI_ANY_ID, PCI_ANY_ID, 0x10600, 0xFFFFFF, 0 }, - { } /* terminate list */ -}; - - -static struct pci_driver vsc_sata_pci_driver = { - .name = DRV_NAME, - .id_table = vsc_sata_pci_tbl, - .probe = vsc_sata_init_one, - .remove = ata_pci_remove_one, -}; - - -static int __init vsc_sata_init(void) -{ - return pci_module_init(&vsc_sata_pci_driver); -} - - -static void __exit vsc_sata_exit(void) -{ - pci_unregister_driver(&vsc_sata_pci_driver); -} - - -MODULE_AUTHOR("Jeremy Higdon"); -MODULE_DESCRIPTION("low-level driver for Vitesse VSC7174 SATA controller"); -MODULE_LICENSE("GPL"); -MODULE_DEVICE_TABLE(pci, vsc_sata_pci_tbl); -MODULE_VERSION(DRV_VERSION); - -module_init(vsc_sata_init); -module_exit(vsc_sata_exit); |