504 lines
13 KiB
C
504 lines
13 KiB
C
/*
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* sata_via.c - VIA Serial ATA controllers
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*
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* Maintained by: Jeff Garzik <jgarzik@pobox.com>
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* Please ALWAYS copy linux-ide@vger.kernel.org
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on emails.
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*
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* Copyright 2003-2004 Red Hat, Inc. All rights reserved.
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* Copyright 2003-2004 Jeff Garzik
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*
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* libata documentation is available via 'make {ps|pdf}docs',
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* as Documentation/DocBook/libata.*
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*
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* Hardware documentation available under NDA.
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*
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*
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* To-do list:
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* - VT6421 PATA support
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*
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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 <asm/io.h>
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#define DRV_NAME "sata_via"
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#define DRV_VERSION "2.0"
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enum board_ids_enum {
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vt6420,
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vt6421,
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};
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enum {
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SATA_CHAN_ENAB = 0x40, /* SATA channel enable */
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SATA_INT_GATE = 0x41, /* SATA interrupt gating */
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SATA_NATIVE_MODE = 0x42, /* Native mode enable */
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SATA_PATA_SHARING = 0x49, /* PATA/SATA sharing func ctrl */
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PORT0 = (1 << 1),
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PORT1 = (1 << 0),
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ALL_PORTS = PORT0 | PORT1,
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N_PORTS = 2,
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NATIVE_MODE_ALL = (1 << 7) | (1 << 6) | (1 << 5) | (1 << 4),
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SATA_EXT_PHY = (1 << 6), /* 0==use PATA, 1==ext phy */
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SATA_2DEV = (1 << 5), /* SATA is master/slave */
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};
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static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
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static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg);
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static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
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static void vt6420_error_handler(struct ata_port *ap);
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static const struct pci_device_id svia_pci_tbl[] = {
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{ PCI_VDEVICE(VIA, 0x0591), vt6420 },
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{ PCI_VDEVICE(VIA, 0x3149), vt6420 },
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{ PCI_VDEVICE(VIA, 0x3249), vt6421 },
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{ } /* terminate list */
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};
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static struct pci_driver svia_pci_driver = {
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.name = DRV_NAME,
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.id_table = svia_pci_tbl,
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.probe = svia_init_one,
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.remove = ata_pci_remove_one,
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};
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static struct scsi_host_template svia_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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.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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.bios_param = ata_std_bios_param,
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};
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static const struct ata_port_operations vt6420_sata_ops = {
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.port_disable = ata_port_disable,
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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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.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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.freeze = ata_bmdma_freeze,
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.thaw = ata_bmdma_thaw,
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.error_handler = vt6420_error_handler,
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.post_internal_cmd = ata_bmdma_post_internal_cmd,
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.irq_handler = ata_interrupt,
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.irq_clear = ata_bmdma_irq_clear,
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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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static const struct ata_port_operations vt6421_sata_ops = {
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.port_disable = ata_port_disable,
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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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.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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.freeze = ata_bmdma_freeze,
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.thaw = ata_bmdma_thaw,
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.error_handler = ata_bmdma_error_handler,
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.post_internal_cmd = ata_bmdma_post_internal_cmd,
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.irq_handler = ata_interrupt,
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.irq_clear = ata_bmdma_irq_clear,
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.scr_read = svia_scr_read,
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.scr_write = svia_scr_write,
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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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static struct ata_port_info vt6420_port_info = {
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.sht = &svia_sht,
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.flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
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.pio_mask = 0x1f,
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.mwdma_mask = 0x07,
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.udma_mask = 0x7f,
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.port_ops = &vt6420_sata_ops,
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};
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MODULE_AUTHOR("Jeff Garzik");
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MODULE_DESCRIPTION("SCSI low-level driver for VIA SATA controllers");
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MODULE_LICENSE("GPL");
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MODULE_DEVICE_TABLE(pci, svia_pci_tbl);
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MODULE_VERSION(DRV_VERSION);
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static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg)
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{
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if (sc_reg > SCR_CONTROL)
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return 0xffffffffU;
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return inl(ap->ioaddr.scr_addr + (4 * sc_reg));
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}
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static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
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{
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if (sc_reg > SCR_CONTROL)
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return;
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outl(val, ap->ioaddr.scr_addr + (4 * sc_reg));
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}
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/**
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* vt6420_prereset - prereset for vt6420
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* @ap: target ATA port
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*
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* SCR registers on vt6420 are pieces of shit and may hang the
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* whole machine completely if accessed with the wrong timing.
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* To avoid such catastrophe, vt6420 doesn't provide generic SCR
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* access operations, but uses SStatus and SControl only during
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* boot probing in controlled way.
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*
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* As the old (pre EH update) probing code is proven to work, we
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* strictly follow the access pattern.
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*
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* LOCKING:
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* Kernel thread context (may sleep)
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*
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* RETURNS:
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* 0 on success, -errno otherwise.
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*/
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static int vt6420_prereset(struct ata_port *ap)
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{
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struct ata_eh_context *ehc = &ap->eh_context;
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unsigned long timeout = jiffies + (HZ * 5);
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u32 sstatus, scontrol;
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int online;
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/* don't do any SCR stuff if we're not loading */
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if (!(ap->pflags & ATA_PFLAG_LOADING))
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goto skip_scr;
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/* Resume phy. This is the old resume sequence from
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* __sata_phy_reset().
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*/
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svia_scr_write(ap, SCR_CONTROL, 0x300);
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svia_scr_read(ap, SCR_CONTROL); /* flush */
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/* wait for phy to become ready, if necessary */
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do {
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msleep(200);
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if ((svia_scr_read(ap, SCR_STATUS) & 0xf) != 1)
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break;
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} while (time_before(jiffies, timeout));
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/* open code sata_print_link_status() */
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sstatus = svia_scr_read(ap, SCR_STATUS);
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scontrol = svia_scr_read(ap, SCR_CONTROL);
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online = (sstatus & 0xf) == 0x3;
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ata_port_printk(ap, KERN_INFO,
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"SATA link %s 1.5 Gbps (SStatus %X SControl %X)\n",
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online ? "up" : "down", sstatus, scontrol);
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/* SStatus is read one more time */
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svia_scr_read(ap, SCR_STATUS);
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if (!online) {
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/* tell EH to bail */
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ehc->i.action &= ~ATA_EH_RESET_MASK;
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return 0;
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}
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skip_scr:
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/* wait for !BSY */
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ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
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return 0;
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}
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static void vt6420_error_handler(struct ata_port *ap)
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{
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return ata_bmdma_drive_eh(ap, vt6420_prereset, ata_std_softreset,
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NULL, ata_std_postreset);
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}
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static const unsigned int svia_bar_sizes[] = {
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8, 4, 8, 4, 16, 256
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};
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static const unsigned int vt6421_bar_sizes[] = {
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16, 16, 16, 16, 32, 128
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};
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static unsigned long svia_scr_addr(unsigned long addr, unsigned int port)
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{
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return addr + (port * 128);
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}
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static unsigned long vt6421_scr_addr(unsigned long addr, unsigned int port)
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{
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return addr + (port * 64);
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}
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static void vt6421_init_addrs(struct ata_probe_ent *probe_ent,
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struct pci_dev *pdev,
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unsigned int port)
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{
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unsigned long reg_addr = pci_resource_start(pdev, port);
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unsigned long bmdma_addr = pci_resource_start(pdev, 4) + (port * 8);
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unsigned long scr_addr;
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probe_ent->port[port].cmd_addr = reg_addr;
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probe_ent->port[port].altstatus_addr =
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probe_ent->port[port].ctl_addr = (reg_addr + 8) | ATA_PCI_CTL_OFS;
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probe_ent->port[port].bmdma_addr = bmdma_addr;
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scr_addr = vt6421_scr_addr(pci_resource_start(pdev, 5), port);
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probe_ent->port[port].scr_addr = scr_addr;
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ata_std_ports(&probe_ent->port[port]);
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}
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static struct ata_probe_ent *vt6420_init_probe_ent(struct pci_dev *pdev)
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{
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struct ata_probe_ent *probe_ent;
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struct ata_port_info *ppi[2];
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ppi[0] = ppi[1] = &vt6420_port_info;
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probe_ent = ata_pci_init_native_mode(pdev, ppi, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY);
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if (!probe_ent)
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return NULL;
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probe_ent->port[0].scr_addr =
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svia_scr_addr(pci_resource_start(pdev, 5), 0);
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probe_ent->port[1].scr_addr =
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svia_scr_addr(pci_resource_start(pdev, 5), 1);
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return probe_ent;
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}
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static struct ata_probe_ent *vt6421_init_probe_ent(struct pci_dev *pdev)
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{
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struct ata_probe_ent *probe_ent;
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unsigned int i;
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probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
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if (!probe_ent)
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return NULL;
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memset(probe_ent, 0, sizeof(*probe_ent));
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probe_ent->dev = pci_dev_to_dev(pdev);
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INIT_LIST_HEAD(&probe_ent->node);
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probe_ent->sht = &svia_sht;
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probe_ent->port_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY;
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probe_ent->port_ops = &vt6421_sata_ops;
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probe_ent->n_ports = N_PORTS;
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probe_ent->irq = pdev->irq;
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probe_ent->irq_flags = IRQF_SHARED;
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probe_ent->pio_mask = 0x1f;
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probe_ent->mwdma_mask = 0x07;
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probe_ent->udma_mask = 0x7f;
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for (i = 0; i < N_PORTS; i++)
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vt6421_init_addrs(probe_ent, pdev, i);
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return probe_ent;
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}
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static void svia_configure(struct pci_dev *pdev)
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{
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u8 tmp8;
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pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &tmp8);
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dev_printk(KERN_INFO, &pdev->dev, "routed to hard irq line %d\n",
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(int) (tmp8 & 0xf0) == 0xf0 ? 0 : tmp8 & 0x0f);
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/* make sure SATA channels are enabled */
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pci_read_config_byte(pdev, SATA_CHAN_ENAB, &tmp8);
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if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
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dev_printk(KERN_DEBUG, &pdev->dev,
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"enabling SATA channels (0x%x)\n",
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(int) tmp8);
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tmp8 |= ALL_PORTS;
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pci_write_config_byte(pdev, SATA_CHAN_ENAB, tmp8);
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}
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/* make sure interrupts for each channel sent to us */
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pci_read_config_byte(pdev, SATA_INT_GATE, &tmp8);
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if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
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dev_printk(KERN_DEBUG, &pdev->dev,
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"enabling SATA channel interrupts (0x%x)\n",
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(int) tmp8);
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tmp8 |= ALL_PORTS;
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pci_write_config_byte(pdev, SATA_INT_GATE, tmp8);
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}
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/* make sure native mode is enabled */
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pci_read_config_byte(pdev, SATA_NATIVE_MODE, &tmp8);
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if ((tmp8 & NATIVE_MODE_ALL) != NATIVE_MODE_ALL) {
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dev_printk(KERN_DEBUG, &pdev->dev,
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"enabling SATA channel native mode (0x%x)\n",
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(int) tmp8);
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tmp8 |= NATIVE_MODE_ALL;
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pci_write_config_byte(pdev, SATA_NATIVE_MODE, tmp8);
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}
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}
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static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
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{
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static int printed_version;
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unsigned int i;
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int rc;
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struct ata_probe_ent *probe_ent;
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int board_id = (int) ent->driver_data;
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const int *bar_sizes;
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int pci_dev_busy = 0;
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u8 tmp8;
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if (!printed_version++)
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dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
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rc = pci_enable_device(pdev);
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if (rc)
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return rc;
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rc = pci_request_regions(pdev, DRV_NAME);
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if (rc) {
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pci_dev_busy = 1;
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goto err_out;
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}
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if (board_id == vt6420) {
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pci_read_config_byte(pdev, SATA_PATA_SHARING, &tmp8);
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if (tmp8 & SATA_2DEV) {
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dev_printk(KERN_ERR, &pdev->dev,
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"SATA master/slave not supported (0x%x)\n",
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(int) tmp8);
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rc = -EIO;
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goto err_out_regions;
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}
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bar_sizes = &svia_bar_sizes[0];
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} else {
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bar_sizes = &vt6421_bar_sizes[0];
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}
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for (i = 0; i < ARRAY_SIZE(svia_bar_sizes); i++)
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if ((pci_resource_start(pdev, i) == 0) ||
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(pci_resource_len(pdev, i) < bar_sizes[i])) {
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dev_printk(KERN_ERR, &pdev->dev,
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"invalid PCI BAR %u (sz 0x%llx, val 0x%llx)\n",
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i,
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(unsigned long long)pci_resource_start(pdev, i),
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(unsigned long long)pci_resource_len(pdev, i));
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rc = -ENODEV;
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goto err_out_regions;
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}
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rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
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if (rc)
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goto err_out_regions;
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rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
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if (rc)
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goto err_out_regions;
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if (board_id == vt6420)
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probe_ent = vt6420_init_probe_ent(pdev);
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else
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probe_ent = vt6421_init_probe_ent(pdev);
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if (!probe_ent) {
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dev_printk(KERN_ERR, &pdev->dev, "out of memory\n");
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rc = -ENOMEM;
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goto err_out_regions;
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}
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svia_configure(pdev);
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pci_set_master(pdev);
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/* FIXME: check ata_device_add return value */
|
|
ata_device_add(probe_ent);
|
|
kfree(probe_ent);
|
|
|
|
return 0;
|
|
|
|
err_out_regions:
|
|
pci_release_regions(pdev);
|
|
err_out:
|
|
if (!pci_dev_busy)
|
|
pci_disable_device(pdev);
|
|
return rc;
|
|
}
|
|
|
|
static int __init svia_init(void)
|
|
{
|
|
return pci_register_driver(&svia_pci_driver);
|
|
}
|
|
|
|
static void __exit svia_exit(void)
|
|
{
|
|
pci_unregister_driver(&svia_pci_driver);
|
|
}
|
|
|
|
module_init(svia_init);
|
|
module_exit(svia_exit);
|
|
|