/*
* sata_via.c - VIA Serial ATA controllers
*
* Maintained by: Jeff Garzik <jgarzik@pobox.com>
* Please ALWAYS copy linux-ide@vger.kernel.org
on emails.
*
* Copyright 2003-2004 Red Hat, Inc. All rights reserved.
* Copyright 2003-2004 Jeff Garzik
*
*
* 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.*
*
* Hardware documentation available under NDA.
*
*
* To-do list:
* - VT6421 PATA support
*
*/
#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/device.h>
#include <scsi/scsi_host.h>
#include <linux/libata.h>
#define DRV_NAME "sata_via"
#define DRV_VERSION "2.1"
enum board_ids_enum {
vt6420,
vt6421,
};
enum {
SATA_CHAN_ENAB = 0x40, /* SATA channel enable */
SATA_INT_GATE = 0x41, /* SATA interrupt gating */
SATA_NATIVE_MODE = 0x42, /* Native mode enable */
SATA_PATA_SHARING = 0x49, /* PATA/SATA sharing func ctrl */
PATA_UDMA_TIMING = 0xB3, /* PATA timing for DMA/ cable detect */
PATA_PIO_TIMING = 0xAB, /* PATA timing register */
PORT0 = (1 << 1),
PORT1 = (1 << 0),
ALL_PORTS = PORT0 | PORT1,
NATIVE_MODE_ALL = (1 << 7) | (1 << 6) | (1 << 5) | (1 << 4),
SATA_EXT_PHY = (1 << 6), /* 0==use PATA, 1==ext phy */
SATA_2DEV = (1 << 5), /* SATA is master/slave */
};
static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg);
static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
static void svia_noop_freeze(struct ata_port *ap);
static void vt6420_error_handler(struct ata_port *ap);
static int vt6421_pata_cable_detect(struct ata_port *ap);
static void vt6421_set_pio_mode(struct ata_port *ap, struct ata_device *adev);
static void vt6421_set_dma_mode(struct ata_port *ap, struct ata_device *adev);
static const struct pci_device_id svia_pci_tbl[] = {
{ PCI_VDEVICE(VIA, 0x5337), vt6420 },
{ PCI_VDEVICE(VIA, 0x0591), vt6420 },
{ PCI_VDEVICE(VIA, 0x3149), vt6420 },
{ PCI_VDEVICE(VIA, 0x3249), vt6421 },
{ } /* terminate list */
};
static struct pci_driver svia_pci_driver = {
.name = DRV_NAME,
.id_table = svia_pci_tbl,
.probe = svia_init_one,
.remove = ata_pci_remove_one,
};
static struct scsi_host_template svia_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 vt6420_sata_ops = {
.port_disable = ata_port_disable,
.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,
.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_data_xfer,
.freeze = svia_noop_freeze,
.thaw = ata_bmdma_thaw,
.error_handler = vt6420_error_handler,
.post_internal_cmd = ata_bmdma_post_internal_cmd,
.irq_clear = ata_bmdma_irq_clear,
.irq_on = ata_irq_on,
.irq_ack = ata_irq_ack,
.port_start = ata_port_start,
};
static const struct ata_port_operations vt6421_pata_ops = {
.port_disable = ata_port_disable,
.set_piomode = vt6421_set_pio_mode,
.set_dmamode = vt6421_set_dma_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,
.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_data_xfer,
.freeze = ata_bmdma_freeze,
.thaw = ata_bmdma_thaw,
.error_handler = ata_bmdma_error_handler,
.post_internal_cmd = ata_bmdma_post_internal_cmd,
.cable_detect = vt6421_pata_cable_detect,
.irq_clear = ata_bmdma_irq_clear,
.irq_on = ata_irq_on,
.irq_ack = ata_irq_ack,
.port_start = ata_port_start,
};
static const struct ata_port_operations vt6421_sata_ops = {
.port_disable = ata_port_disable,
.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,
.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_data_xfer,
.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_sata,
.irq_clear = ata_bmdma_irq_clear,
.irq_on = ata_irq_on,
.irq_ack = ata_irq_ack,
.scr_read = svia_scr_read,
.scr_write = svia_scr_write,
.port_start = ata_port_start,
};
static const struct ata_port_info vt6420_port_info = {
.flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
.pio_mask = 0x1f,
.mwdma_mask = 0x07,
.udma_mask = 0x7f,
.port_ops = &vt6420_sata_ops,
};
static struct ata_port_info vt6421_sport_info = {
.flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
.pio_mask = 0x1f,
.mwdma_mask = 0x07,
.udma_mask = 0x7f,
.port_ops = &vt6421_sata_ops,
};
static struct ata_port_info vt6421_pport_info = {
.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_NO_LEGACY,
.pio_mask = 0x1f,
.mwdma_mask = 0,
.udma_mask = 0x7f,
.port_ops = &vt6421_pata_ops,
};
MODULE_AUTHOR("Jeff Garzik");
MODULE_DESCRIPTION("SCSI low-level driver for VIA SATA controllers");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, svia_pci_tbl);
MODULE_VERSION(DRV_VERSION);
static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg)
{
if (sc_reg > SCR_CONTROL)
return 0xffffffffU;
return ioread32(ap->ioaddr.scr_addr + (4 * sc_reg));
}
static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
{
if (sc_reg > SCR_CONTROL)
return;
iowrite32(val, ap->ioaddr.scr_addr + (4 * sc_reg));
}
static void svia_noop_freeze(struct ata_port *ap)
{
/* Some VIA controllers choke if ATA_NIEN is manipulated in
* certain way. Leave it alone and just clear pending IRQ.
*/
ata_chk_status(ap);
ata_bmdma_irq_clear(ap);
}
/**
* vt6420_prereset - prereset for vt6420
* @ap: target ATA port
* @deadline: deadline jiffies for the operation
*
* SCR registers on vt6420 are pieces of shit and may hang the
* whole machine completely if accessed with the wrong timing.
* To avoid such catastrophe, vt6420 doesn't provide generic SCR
* access operations, but uses SStatus and SControl only during
* boot probing in controlled way.
*
* As the old (pre EH update) probing code is proven to work, we
* strictly follow the access pattern.
*
* LOCKING:
* Kernel thread context (may sleep)
*
* RETURNS:
* 0 on success, -errno otherwise.
*/
static int vt6420_prereset(struct ata_port *ap, unsigned long deadline)
{
struct ata_eh_context *ehc = &ap->eh_context;
unsigned long timeout = jiffies + (HZ * 5);
u32 sstatus, scontrol;
int online;
/* don't do any SCR stuff if we're not loading */
if (!(ap->pflags & ATA_PFLAG_LOADING))
goto skip_scr;
/* Resume phy. This is the old resume sequence from
* __sata_phy_reset().
*/
svia_scr_write(ap, SCR_CONTROL, 0x300);
svia_scr_read(ap, SCR_CONTROL); /* flush */
/* wait for phy to become ready, if necessary */
do {
msleep(200);
if ((svia_scr_read(ap, SCR_STATUS) & 0xf) != 1)
break;
} while (time_before(jiffies, timeout));
/* open code sata_print_link_status() */
sstatus = svia_scr_read(ap, SCR_STATUS);
scontrol = svia_scr_read(ap, SCR_CONTROL);
online = (sstatus & 0xf) == 0x3;
ata_port_printk(ap, KERN_INFO,
"SATA link %s 1.5 Gbps (SStatus %X SControl %X)\n",
online ? "up" : "down", sstatus, scontrol);
/* SStatus is read one more time */
svia_scr_read(ap, SCR_STATUS);
if (!online) {
/* tell EH to bail */
ehc->i.action &= ~ATA_EH_RESET_MASK;
return 0;
}
skip_scr:
/* wait for !BSY */
ata_wait_ready(ap, deadline);
return 0;
}
static void vt6420_error_handler(struct ata_port *ap)
{
return ata_bmdma_drive_eh(ap, vt6420_prereset, ata_std_softreset,
NULL, ata_std_postreset);
}
static int vt6421_pata_cable_detect(struct ata_port *ap)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
u8 tmp;
pci_read_config_byte(pdev, PATA_UDMA_TIMING, &tmp);
if (tmp & 0x10)
return ATA_CBL_PATA40;
return ATA_CBL_PATA80;
}
static void vt6421_set_pio_mode(struct ata_port *ap, struct ata_device *adev)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
static const u8 pio_bits[] = { 0xA8, 0x65, 0x65, 0x31, 0x20 };
pci_write_config_byte(pdev, PATA_PIO_TIMING, pio_bits[adev->pio_mode - XFER_PIO_0]);
}
static void vt6421_set_dma_mode(struct ata_port *ap, struct ata_device *adev)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
static const u8 udma_bits[] = { 0xEE, 0xE8, 0xE6, 0xE4, 0xE2, 0xE1, 0xE0, 0xE0 };
pci_write_config_byte(pdev, PATA_UDMA_TIMING, udma_bits[adev->pio_mode - XFER_UDMA_0]);
}
static const unsigned int svia_bar_sizes[] = {
8, 4, 8, 4, 16, 256
};
static const unsigned int vt6421_bar_sizes[] = {
16, 16, 16, 16, 32, 128
};
static void __iomem * svia_scr_addr(void __iomem *addr, unsigned int port)
{
return addr + (port * 128);
}
static void __iomem * vt6421_scr_addr(void __iomem *addr, unsigned int port)
{
return addr + (port * 64);
}
static void vt6421_init_addrs(struct ata_port *ap)
{
void __iomem * const * iomap = ap->host->iomap;
void __iomem *reg_addr = iomap[ap->port_no];
void __iomem *bmdma_addr = iomap[4] + (ap->port_no * 8);
struct ata_ioports *ioaddr = &ap->ioaddr;
ioaddr->cmd_addr = reg_addr;
ioaddr->altstatus_addr =
ioaddr->ctl_addr = (void __iomem *)
((unsigned long)(reg_addr + 8) | ATA_PCI_CTL_OFS);
ioaddr->bmdma_addr = bmdma_addr;
ioaddr->scr_addr = vt6421_scr_addr(iomap[5], ap->port_no);
ata_std_ports(ioaddr);
}
static int vt6420_prepare_host(struct pci_dev *pdev, struct ata_host **r_host)
{
const struct ata_port_info *ppi[] = { &vt6420_port_info, NULL };
struct ata_host *host;
int rc;
rc = ata_pci_prepare_native_host(pdev, ppi, 2, &host);
if (rc)
return rc;
*r_host = host;
rc = pcim_iomap_regions(pdev, 1 << 5, DRV_NAME);
if (rc) {
dev_printk(KERN_ERR, &pdev->dev, "failed to iomap PCI BAR 5\n");
return rc;
}
host->ports[0]->ioaddr.scr_addr = svia_scr_addr(host->iomap[5], 0);
host->ports[1]->ioaddr.scr_addr = svia_scr_addr(host->iomap[5], 1);
return 0;
}
static int vt6421_prepare_host(struct pci_dev *pdev, struct ata_host **r_host)
{
const struct ata_port_info *ppi[] =
{ &vt6421_sport_info, &vt6421_sport_info, &vt6421_pport_info };
struct ata_host *host;
int i, rc;
*r_host = host = ata_host_alloc_pinfo(&pdev->dev, ppi, ARRAY_SIZE(ppi));
if (!host) {
dev_printk(KERN_ERR, &pdev->dev, "failed to allocate host\n");
return -ENOMEM;
}
rc = pcim_iomap_regions(pdev, 0x1f, DRV_NAME);
if (rc) {
dev_printk(KERN_ERR, &pdev->dev, "failed to request/iomap "
"PCI BARs (errno=%d)\n", rc);
return rc;
}
host->iomap = pcim_iomap_table(pdev);
for (i = 0; i < host->n_ports; i++)
vt6421_init_addrs(host->ports[i]);
rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
if (rc)
return rc;
rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
if (rc)
return rc;
return 0;
}
static void svia_configure(struct pci_dev *pdev)
{
u8 tmp8;
pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &tmp8);
dev_printk(KERN_INFO, &pdev->dev, "routed to hard irq line %d\n",
(int) (tmp8 & 0xf0) == 0xf0 ? 0 : tmp8 & 0x0f);
/* make sure SATA channels are enabled */
pci_read_config_byte(pdev, SATA_CHAN_ENAB, &tmp8);
if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
dev_printk(KERN_DEBUG, &pdev->dev,
"enabling SATA channels (0x%x)\n",
(int) tmp8);
tmp8 |= ALL_PORTS;
pci_write_config_byte(pdev, SATA_CHAN_ENAB, tmp8);
}
/* make sure interrupts for each channel sent to us */
pci_read_config_byte(pdev, SATA_INT_GATE, &tmp8);
if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
dev_printk(KERN_DEBUG, &pdev->dev,
"enabling SATA channel interrupts (0x%x)\n",
(int) tmp8);
tmp8 |= ALL_PORTS;
pci_write_config_byte(pdev, SATA_INT_GATE, tmp8);
}
/* make sure native mode is enabled */
pci_read_config_byte(pdev, SATA_NATIVE_MODE, &tmp8);
if ((tmp8 & NATIVE_MODE_ALL) != NATIVE_MODE_ALL) {
dev_printk(KERN_DEBUG, &pdev->dev,
"enabling SATA channel native mode (0x%x)\n",
(int) tmp8);
tmp8 |= NATIVE_MODE_ALL;
pci_write_config_byte(pdev, SATA_NATIVE_MODE, tmp8);
}
}
static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
{
static int printed_version;
unsigned int i;
int rc;
struct ata_host *host;
int board_id = (int) ent->driver_data;
const int *bar_sizes;
u8 tmp8;
if (!printed_version++)
dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
rc = pcim_enable_device(pdev);
if (rc)
return rc;
if (board_id == vt6420) {
pci_read_config_byte(pdev, SATA_PATA_SHARING, &tmp8);
if (tmp8 & SATA_2DEV) {
dev_printk(KERN_ERR, &pdev->dev,
"SATA master/slave not supported (0x%x)\n",
(int) tmp8);
return -EIO;
}
bar_sizes = &svia_bar_sizes[0];
} else {
bar_sizes = &vt6421_bar_sizes[0];
}
for (i = 0; i < ARRAY_SIZE(svia_bar_sizes); i++)
if ((pci_resource_start(pdev, i) == 0) ||
(pci_resource_len(pdev, i) < bar_sizes[i])) {
dev_printk(KERN_ERR, &pdev->dev,
"invalid PCI BAR %u (sz 0x%llx, val 0x%llx)\n",
i,
(unsigned long long)pci_resource_start(pdev, i),
(unsigned long long)pci_resource_len(pdev, i));
return -ENODEV;
}
if (board_id == vt6420)
rc = vt6420_prepare_host(pdev, &host);
else
rc = vt6421_prepare_host(pdev, &host);
if (rc)
return rc;
svia_configure(pdev);
pci_set_master(pdev);
return ata_host_activate(host, pdev->irq, ata_interrupt, IRQF_SHARED,
&svia_sht);
}
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);
