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/*
* Linux driver attachment glue for PCI based 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/aic7xxx_linux_pci.c#27 $
*/
#include "aic7xxx_osm.h"
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0)
struct pci_device_id
{
};
#endif
static int ahc_linux_pci_dev_probe(struct pci_dev *pdev,
const struct pci_device_id *ent);
static int ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc,
u_long *base);
#ifdef MMAPIO
static int ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc,
u_long *bus_addr,
uint8_t **maddr);
#endif /* MMAPIO */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
static void ahc_linux_pci_dev_remove(struct pci_dev *pdev);
/* We do our own ID filtering. So, grab all SCSI storage class devices. */
static struct pci_device_id ahc_linux_pci_id_table[] = {
{
0x9004, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
PCI_CLASS_STORAGE_SCSI << 8, 0xFFFF00, 0
},
{
0x9005, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
PCI_CLASS_STORAGE_SCSI << 8, 0xFFFF00, 0
},
{ 0 }
};
MODULE_DEVICE_TABLE(pci, ahc_linux_pci_id_table);
struct pci_driver aic7xxx_pci_driver = {
name: "aic7xxx",
probe: ahc_linux_pci_dev_probe,
remove: ahc_linux_pci_dev_remove,
id_table: ahc_linux_pci_id_table
};
static void
ahc_linux_pci_dev_remove(struct pci_dev *pdev)
{
struct ahc_softc *ahc;
struct ahc_softc *list_ahc;
/*
* We should be able to just perform
* the free directly, but check our
* list for extra sanity.
*/
ahc = pci_get_drvdata(pdev);
TAILQ_FOREACH(list_ahc, &ahc_tailq, links) {
if (list_ahc == ahc) {
ahc_free(ahc);
break;
}
}
}
#endif /* !LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0) */
static int
ahc_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
char buf[80];
struct ahc_softc *ahc;
ahc_dev_softc_t pci;
struct ahc_pci_identity *entry;
char *name;
int error;
/*
* Some BIOSen report the same device multiple times.
*/
TAILQ_FOREACH(ahc, &ahc_tailq, links) {
struct pci_dev *probed_pdev;
probed_pdev = ahc->dev_softc;
if (probed_pdev->bus->number == pdev->bus->number
&& probed_pdev->devfn == pdev->devfn)
break;
}
if (ahc != NULL) {
/* Skip duplicate. */
return (-ENODEV);
}
pci = pdev;
entry = ahc_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, "ahc_pci:%d:%d:%d",
ahc_get_pci_bus(pci),
ahc_get_pci_slot(pci),
ahc_get_pci_function(pci));
name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
if (name == NULL)
return (-ENOMEM);
strcpy(name, buf);
ahc = ahc_alloc(NULL, name);
if (ahc == NULL)
return (-ENOMEM);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
if (pci_enable_device(pdev)) {
ahc_free(ahc);
return (-ENODEV);
}
pci_set_master(pdev);
if (sizeof(bus_addr_t) > 4
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,3)
&& ahc_linux_get_memsize() > 0x80000000
&& pci_set_dma_mask(pdev, 0x7FFFFFFFFFULL) == 0) {
#else
&& ahc_linux_get_memsize() > 0x80000000) {
ahc->dev_softc->dma_mask =
(bus_addr_t)(0x7FFFFFFFFFULL & (bus_addr_t)~0);
#endif
ahc->flags |= AHC_39BIT_ADDRESSING;
ahc->platform_data->hw_dma_mask =
(bus_addr_t)(0x7FFFFFFFFFULL & (bus_addr_t)~0);
}
#endif
ahc->dev_softc = pci;
ahc->platform_data->irq = pdev->irq;
error = ahc_pci_config(ahc, entry);
if (error != 0) {
ahc_free(ahc);
return (-error);
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
pci_set_drvdata(pdev, ahc);
if (aic7xxx_detect_complete)
ahc_linux_register_host(ahc, aic7xxx_driver_template);
#endif
return (0);
}
int
ahc_linux_pci_probe(Scsi_Host_Template *template)
{
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
return (pci_module_init(&aic7xxx_pci_driver));
#else
struct pci_dev *pdev;
u_int class;
int found;
/* If we don't have a PCI bus, we can't find any adapters. */
if (pci_present() == 0)
return (0);
found = 0;
pdev = NULL;
class = PCI_CLASS_STORAGE_SCSI << 8;
while ((pdev = pci_find_class(class, pdev)) != NULL) {
ahc_dev_softc_t pci;
int error;
pci = pdev;
error = ahc_linux_pci_dev_probe(pdev, /*pci_devid*/NULL);
if (error == 0)
found++;
}
return (found);
#endif
}
static int
ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc, u_long *base)
{
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
*base = pci_resource_start(ahc->dev_softc, 0);
#else
*base = ahc_pci_read_config(ahc->dev_softc, PCIR_MAPS, 4);
*base &= PCI_BASE_ADDRESS_IO_MASK;
#endif
if (base == 0)
return (ENOMEM);
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0)
if (check_region(*base, 256) != 0)
return (ENOMEM);
else
request_region(*base, 256, "aic7xxx");
#else
if (request_region(*base, 256, "aic7xxx") == 0)
return (ENOMEM);
#endif
return (0);
}
#ifdef MMAPIO
static int
ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc,
u_long *bus_addr,
uint8_t **maddr)
{
u_long start;
u_long base_page;
u_long base_offset;
int error;
error = 0;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
start = pci_resource_start(ahc->dev_softc, 1);
base_page = start & PAGE_MASK;
base_offset = start - base_page;
#else
start = ahc_pci_read_config(ahc->dev_softc, PCIR_MAPS+4, 4);
base_offset = start & PCI_BASE_ADDRESS_MEM_MASK;
base_page = base_offset & PAGE_MASK;
base_offset -= base_page;
#endif
if (start != 0) {
*bus_addr = start;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
if (request_mem_region(start, 0x1000, "aic7xxx") == 0)
error = ENOMEM;
#endif
if (error == 0) {
*maddr = ioremap_nocache(base_page, base_offset + 256);
if (*maddr == NULL)
error = ENOMEM;
else
*maddr += base_offset;
}
} else
error = ENOMEM;
return (error);
}
#endif /* MMAPIO */
int
ahc_pci_map_registers(struct ahc_softc *ahc)
{
uint32_t command;
u_long base;
uint8_t *maddr;
int error;
int io_error;
/*
* We always reserve both our register spaces to avoid
* other devices claiming them.
*/
command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, 4);
command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);
base = 0;
maddr = NULL;
#ifdef MMAPIO
error = ahc_linux_pci_reserve_mem_region(ahc, &base, &maddr);
if (error == 0) {
ahc->platform_data->mem_busaddr = base;
ahc->tag = BUS_SPACE_MEMIO;
ahc->bsh.maddr = maddr;
ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND,
command | PCIM_CMD_MEMEN, 4);
/*
* Do a quick test to see if memory mapped
* I/O is functioning correctly.
*/
if (ahc_inb(ahc, HCNTRL) == 0xFF) {
printf("aic7xxx: PCI Device %d:%d:%d "
"failed memory mapped test\n",
ahc_get_pci_bus(ahc->dev_softc),
ahc_get_pci_slot(ahc->dev_softc),
ahc_get_pci_function(ahc->dev_softc));
maddr = NULL;
} else
command |= PCIM_CMD_MEMEN;
} else {
printf("aic7xxx: PCI%d:%d:%d MEM region 0x%lx "
"unavailable. Cannot map device.\n",
ahc_get_pci_bus(ahc->dev_softc),
ahc_get_pci_slot(ahc->dev_softc),
ahc_get_pci_function(ahc->dev_softc),
base);
}
#endif
/*
* We always prefer memory mapped access. Only
* complain about our ioport conflicting with
* another device if we are going to use it.
*/
io_error = ahc_linux_pci_reserve_io_region(ahc, &base);
if (maddr == NULL) {
error = io_error;
if (error != 0) {
printf("aic7xxx: PCI%d:%d:%d IO region 0x%lx[0..255] "
"unavailable. Cannot map device.\n",
ahc_get_pci_bus(ahc->dev_softc),
ahc_get_pci_slot(ahc->dev_softc),
ahc_get_pci_function(ahc->dev_softc),
base);
base = 0;
} else {
ahc->tag = BUS_SPACE_PIO;
ahc->bsh.ioport = base;
command |= PCIM_CMD_PORTEN;
}
}
ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, command, 4);
return (error);
}
int
ahc_pci_map_int(struct ahc_softc *ahc)
{
int error;
ahc->platform_data->irq = ahc->dev_softc->irq;
error = request_irq(ahc->platform_data->irq, ahc_linux_isr,
SA_SHIRQ, "aic7xxx", ahc);
return (-error);
}
void
ahc_power_state_change(struct ahc_softc *ahc, ahc_power_state new_state)
{
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
pci_set_power_state(ahc->dev_softc, new_state);
#else
uint32_t cap;
u_int cap_offset;
/*
* Traverse the capability list looking for
* the power management capability.
*/
cap = 0;
cap_offset = ahc_pci_read_config(ahc->dev_softc,
PCIR_CAP_PTR, /*bytes*/1);
while (cap_offset != 0) {
cap = ahc_pci_read_config(ahc->dev_softc,
cap_offset, /*bytes*/4);
if ((cap & 0xFF) == 1
&& ((cap >> 16) & 0x3) > 0) {
uint32_t pm_control;
pm_control = ahc_pci_read_config(ahc->dev_softc,
cap_offset + 4,
/*bytes*/4);
pm_control &= ~0x3;
pm_control |= new_state;
ahc_pci_write_config(ahc->dev_softc,
cap_offset + 4,
pm_control, /*bytes*/2);
break;
}
cap_offset = (cap >> 8) & 0xFF;
}
#endif
}
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