/*
* Linux driver attachment glue for PCI based U320 controllers .
*
* Copyright ( c ) 2000 - 2001 Adaptec Inc .
* All rights reserved .
*
* Redistribution and use in source and binary forms , with or without
* modification , are permitted provided that the following conditions
* are met :
* 1 . Redistributions of source code must retain the above copyright
* notice , this list of conditions , and the following disclaimer ,
* without modification .
* 2 . Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the " NO WARRANTY " disclaimer below
* ( " Disclaimer " ) and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution .
* 3 . Neither the names of the above - listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission .
*
* Alternatively , this software may be distributed under the terms of the
* GNU General Public License ( " GPL " ) version 2 as published by the Free
* Software Foundation .
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* " AS IS " AND ANY EXPRESS OR IMPLIED WARRANTIES , INCLUDING , BUT NOT
* LIMITED TO , THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED . IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL , EXEMPLARY , OR CONSEQUENTIAL
* DAMAGES ( INCLUDING , BUT NOT LIMITED TO , PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES ; LOSS OF USE , DATA , OR PROFITS ; OR BUSINESS INTERRUPTION )
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY , WHETHER IN CONTRACT ,
* STRICT LIABILITY , OR TORT ( INCLUDING NEGLIGENCE OR OTHERWISE ) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE , EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES .
*
* $ Id : //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm_pci.c#25 $
*/
#include "aic79xx_osm.h"
#include "aic79xx_inline.h"
#include "aic79xx_pci.h"
/* Define the macro locally since it's different for different class of chips.
*/
#define ID(x) \
ID2C(x), \
ID2C(IDIROC(x))
static const struct pci_device_id ahd_linux_pci_id_table[] = {
/* aic7901 based controllers */
ID(ID_AHA_29320A),
ID(ID_AHA_29320ALP),
ID(ID_AHA_29320LPE),
/* aic7902 based controllers */
ID(ID_AHA_29320),
ID(ID_AHA_29320B),
ID(ID_AHA_29320LP),
ID(ID_AHA_39320),
ID(ID_AHA_39320_B),
ID(ID_AHA_39320A),
ID(ID_AHA_39320D),
ID(ID_AHA_39320D_HP),
ID(ID_AHA_39320D_B),
ID(ID_AHA_39320D_B_HP),
/* Generic chip probes for devices we don't know exactly. */
ID16(ID_AIC7901 & ID_9005_GENERIC_MASK),
ID(ID_AIC7901A & ID_DEV_VENDOR_MASK),
ID16(ID_AIC7902 & ID_9005_GENERIC_MASK),
{ 0 }
};
MODULE_DEVICE_TABLE(pci, ahd_linux_pci_id_table);
static int __maybe_unused
ahd_linux_pci_dev_suspend(struct device *dev)
{
struct ahd_softc *ahd = dev_get_drvdata(dev);
int rc;
if ((rc = ahd_suspend(ahd)))
return rc;
ahd_pci_suspend(ahd);
return rc;
}
static int __maybe_unused
ahd_linux_pci_dev_resume(struct device *dev)
{
struct ahd_softc *ahd = dev_get_drvdata(dev);
ahd_pci_resume(ahd);
ahd_resume(ahd);
return 0 ;
}
static void
ahd_linux_pci_dev_remove(struct pci_dev *pdev)
{
struct ahd_softc *ahd = pci_get_drvdata(pdev);
u_long s;
if (ahd->platform_data && ahd->platform_data->host)
scsi_remove_host(ahd->platform_data->host);
ahd_lock(ahd, &s);
ahd_intr_enable(ahd, FALSE );
ahd_unlock(ahd, &s);
ahd_free(ahd);
}
static void
ahd_linux_pci_inherit_flags(struct ahd_softc *ahd)
{
struct pci_dev *pdev = ahd->dev_softc, *master_pdev;
unsigned int master_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0 );
master_pdev = pci_get_slot(pdev->bus, master_devfn);
if (master_pdev) {
struct ahd_softc *master = pci_get_drvdata(master_pdev);
if (master) {
ahd->flags &= ~AHD_BIOS_ENABLED;
ahd->flags |= master->flags & AHD_BIOS_ENABLED;
} else
printk(KERN_ERR "aic79xx: no multichannel peer found!\n" );
pci_dev_put(master_pdev);
}
}
static int
ahd_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
char buf[80 ];
struct ahd_softc *ahd;
ahd_dev_softc_t pci;
const struct ahd_pci_identity *entry;
char *name;
int error;
struct device *dev = &pdev->dev;
pci = pdev;
entry = ahd_find_pci_device(pci);
if (entry == NULL)
return (-ENODEV);
/*
* Allocate a softc for this card and
* set it up for attachment by our
* common detect routine .
*/
sprintf(buf, "ahd_pci:%d:%d:%d" ,
ahd_get_pci_bus(pci),
ahd_get_pci_slot(pci),
ahd_get_pci_function(pci));
name = kstrdup(buf, GFP_ATOMIC);
if (name == NULL)
return (-ENOMEM);
ahd = ahd_alloc(NULL, name);
if (ahd == NULL)
return (-ENOMEM);
if (pci_enable_device(pdev)) {
ahd_free(ahd);
return (-ENODEV);
}
pci_set_master(pdev);
if (sizeof (dma_addr_t) > 4 ) {
const u64 required_mask = dma_get_required_mask(dev);
if (required_mask > DMA_BIT_MASK(39 ) &&
dma_set_mask(dev, DMA_BIT_MASK(64 )) == 0 )
ahd->flags |= AHD_64BIT_ADDRESSING;
else if (required_mask > DMA_BIT_MASK(32 ) &&
dma_set_mask(dev, DMA_BIT_MASK(39 )) == 0 )
ahd->flags |= AHD_39BIT_ADDRESSING;
else
dma_set_mask(dev, DMA_BIT_MASK(32 ));
} else {
dma_set_mask(dev, DMA_BIT_MASK(32 ));
}
ahd->dev_softc = pci;
error = ahd_pci_config(ahd, entry);
if (error != 0 ) {
ahd_free(ahd);
return (-error);
}
/*
* Second Function PCI devices need to inherit some
* * settings from function 0 .
*/
if ((ahd->features & AHD_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0 )
ahd_linux_pci_inherit_flags(ahd);
pci_set_drvdata(pdev, ahd);
ahd_linux_register_host(ahd, &aic79xx_driver_template);
return (0 );
}
static SIMPLE_DEV_PM_OPS(ahd_linux_pci_dev_pm_ops,
ahd_linux_pci_dev_suspend,
ahd_linux_pci_dev_resume);
static struct pci_driver aic79xx_pci_driver = {
.name = "aic79xx" ,
.probe = ahd_linux_pci_dev_probe,
.driver.pm = &ahd_linux_pci_dev_pm_ops,
.remove = ahd_linux_pci_dev_remove,
.id_table = ahd_linux_pci_id_table
};
int
ahd_linux_pci_init(void )
{
return pci_register_driver(&aic79xx_pci_driver);
}
void
ahd_linux_pci_exit(void )
{
pci_unregister_driver(&aic79xx_pci_driver);
}
static int
ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd, resource_size_t *base,
resource_size_t *base2)
{
*base = pci_resource_start(ahd->dev_softc, 0 );
/*
* This is really the 3 rd bar and should be at index 2 ,
* but the Linux PCI code doesn ' t know how to " count " 64 bit
* bars .
*/
*base2 = pci_resource_start(ahd->dev_softc, 3 );
if (*base == 0 || *base2 == 0 )
return (ENOMEM);
if (!request_region(*base, 256 , "aic79xx" ))
return (ENOMEM);
if (!request_region(*base2, 256 , "aic79xx" )) {
release_region(*base, 256 );
return (ENOMEM);
}
return (0 );
}
static int
ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd,
resource_size_t *bus_addr,
uint8_t __iomem **maddr)
{
resource_size_t start;
resource_size_t base_page;
u_long base_offset;
int error = 0 ;
if (aic79xx_allow_memio == 0 )
return (ENOMEM);
if ((ahd->bugs & AHD_PCIX_MMAPIO_BUG) != 0 )
return (ENOMEM);
start = pci_resource_start(ahd->dev_softc, 1 );
base_page = start & PAGE_MASK;
base_offset = start - base_page;
if (start != 0 ) {
*bus_addr = start;
if (!request_mem_region(start, 0 x1000, "aic79xx" ))
error = ENOMEM;
if (!error) {
*maddr = ioremap(base_page, base_offset + 512 );
if (*maddr == NULL) {
error = ENOMEM;
release_mem_region(start, 0 x1000);
} else
*maddr += base_offset;
}
} else
error = ENOMEM;
return (error);
}
int
ahd_pci_map_registers(struct ahd_softc *ahd)
{
uint32_t command;
resource_size_t base;
uint8_t __iomem *maddr;
int error;
/*
* If its allowed , we prefer memory mapped access .
*/
command = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, 4 );
command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);
base = 0 ;
maddr = NULL;
error = ahd_linux_pci_reserve_mem_region(ahd, &base, &maddr);
if (error == 0 ) {
ahd->platform_data->mem_busaddr = base;
ahd->tags[0 ] = BUS_SPACE_MEMIO;
ahd->bshs[0 ].maddr = maddr;
ahd->tags[1 ] = BUS_SPACE_MEMIO;
ahd->bshs[1 ].maddr = maddr + 0 x100;
ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
command | PCIM_CMD_MEMEN, 4 );
if (ahd_pci_test_register_access(ahd) != 0 ) {
printk("aic79xx: PCI Device %d:%d:%d "
"failed memory mapped test. Using PIO.\n" ,
ahd_get_pci_bus(ahd->dev_softc),
ahd_get_pci_slot(ahd->dev_softc),
ahd_get_pci_function(ahd->dev_softc));
iounmap(maddr);
release_mem_region(ahd->platform_data->mem_busaddr,
0 x1000);
ahd->bshs[0 ].maddr = NULL;
maddr = NULL;
} else
command |= PCIM_CMD_MEMEN;
} else if (bootverbose) {
printk("aic79xx: PCI%d:%d:%d MEM region 0x%llx "
"unavailable. Cannot memory map device.\n" ,
ahd_get_pci_bus(ahd->dev_softc),
ahd_get_pci_slot(ahd->dev_softc),
ahd_get_pci_function(ahd->dev_softc),
(unsigned long long )base);
}
if (maddr == NULL) {
resource_size_t base2;
error = ahd_linux_pci_reserve_io_regions(ahd, &base, &base2);
if (error == 0 ) {
ahd->tags[0 ] = BUS_SPACE_PIO;
ahd->tags[1 ] = BUS_SPACE_PIO;
ahd->bshs[0 ].ioport = (u_long)base;
ahd->bshs[1 ].ioport = (u_long)base2;
command |= PCIM_CMD_PORTEN;
} else {
printk("aic79xx: PCI%d:%d:%d IO regions 0x%llx and "
"0x%llx unavailable. Cannot map device.\n" ,
ahd_get_pci_bus(ahd->dev_softc),
ahd_get_pci_slot(ahd->dev_softc),
ahd_get_pci_function(ahd->dev_softc),
(unsigned long long )base,
(unsigned long long )base2);
}
}
ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, command, 4 );
return (error);
}
int
ahd_pci_map_int(struct ahd_softc *ahd)
{
int error;
error = request_irq(ahd->dev_softc->irq, ahd_linux_isr,
IRQF_SHARED, "aic79xx" , ahd);
if (!error)
ahd->platform_data->irq = ahd->dev_softc->irq;
return (-error);
}
void
ahd_power_state_change(struct ahd_softc *ahd, ahd_power_state new_state)
{
pci_set_power_state(ahd->dev_softc, new_state);
}
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