/*
* 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"
static int ahd_linux_pci_dev_probe(struct pci_dev *pdev,
const struct pci_device_id *ent);
static int ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd,
u_long *base, u_long *base2);
static int ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd,
u_long *bus_addr,
uint8_t __iomem **maddr);
static void ahd_linux_pci_dev_remove(struct pci_dev *pdev);
/* Define the macro locally since it's different for different class of chips.
*/
#define ID(x) \
ID2C(x), \
ID2C(IDIROC(x))
static struct pci_device_id ahd_linux_pci_id_table[] = {
/* aic7901 based controllers */
ID(ID_AHA_29320A),
ID(ID_AHA_29320ALP),
/* 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);
struct pci_driver aic79xx_pci_driver = {
.name = "aic79xx",
.probe = ahd_linux_pci_dev_probe,
.remove = ahd_linux_pci_dev_remove,
.id_table = ahd_linux_pci_id_table
};
static void
ahd_linux_pci_dev_remove(struct pci_dev *pdev)
{
struct ahd_softc *ahd;
u_long l;
/*
* We should be able to just perform
* the free directly, but check our
* list for extra sanity.
*/
ahd_list_lock(&l);
ahd = ahd_find_softc((struct ahd_softc *)pci_get_drvdata(pdev));
if (ahd != NULL) {
u_long s;
TAILQ_REMOVE(&ahd_tailq, ahd, links);
ahd_list_unlock(&l);
ahd_lock(ahd, &s);
ahd_intr_enable(ahd, FALSE);
ahd_unlock(ahd, &s);
ahd_free(ahd);
} else
ahd_list_unlock(&l);
}
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;
struct ahd_pci_identity *entry;
char *name;
int error;
/*
* Some BIOSen report the same device multiple times.
*/
TAILQ_FOREACH(ahd, &ahd_tailq, links) {
struct pci_dev *probed_pdev;
probed_pdev = ahd->dev_softc;
if (probed_pdev->bus->number == pdev->bus->number
&& probed_pdev->devfn == pdev->devfn)
break;
}
if (ahd != NULL) {
/* Skip duplicate. */
return (-ENODEV);
}
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 = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
if (name == NULL)
return (-ENOMEM);
strcpy(name, buf);
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) {
uint64_t memsize;
const uint64_t mask_39bit = 0x7FFFFFFFFFULL;
memsize = ahd_linux_get_memsize();
if (memsize >= 0x8000000000ULL
&& pci_set_dma_mask(pdev, DMA_64BIT_MASK) == 0) {
ahd->flags |= AHD_64BIT_ADDRESSING;
ahd->platform_data->hw_dma_mask = DMA_64BIT_MASK;
} else if (memsize > 0x80000000
&& pci_set_dma_mask(pdev, mask_39bit) == 0) {
ahd->flags |= AHD_39BIT_ADDRESSING;
ahd->platform_data->hw_dma_mask = mask_39bit;
}
} else {
pci_set_dma_mask(pdev, DMA_32BIT_MASK);
ahd->platform_data->hw_dma_mask = DMA_32BIT_MASK;
}
ahd->dev_softc = pci;
error = ahd_pci_config(ahd, entry);
if (error != 0) {
ahd_free(ahd);
return (-error);
}
pci_set_drvdata(pdev, ahd);
if (aic79xx_detect_complete) {
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
ahd_linux_register_host(ahd, &aic79xx_driver_template);
#else
printf("aic79xx: ignoring PCI device found after "
"initialization\n");
return (-ENODEV);
#endif
}
return (0);
}
int
ahd_linux_pci_init(void)
{
return (pci_module_init(&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, u_long *base,
u_long *base2)
{
*base = pci_resource_start(ahd->dev_softc, 0);
/*
* This is really the 3rd bar and should be at index 2,
* but the Linux PCI code doesn't know how to "count" 64bit
* bars.
*/
*base2 = pci_resource_start(ahd->dev_softc, 3);
if (*base == 0 || *base2 == 0)
return (ENOMEM);
if (request_region(*base, 256, "aic79xx") == 0)
return (ENOMEM);
if (request_region(*base2, 256, "aic79xx") == 0) {
release_region(*base2, 256);
return (ENOMEM);
}
return (0);
}
static int
ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd,
u_long *bus_addr,
uint8_t __iomem **maddr)
{
u_long start;
u_long base_page;
u_long base_offset;
int error;
if (aic79xx_allow_memio == 0)
return (ENOMEM);
if ((ahd->bugs & AHD_PCIX_MMAPIO_BUG) != 0)
return (ENOMEM);
error = 0;
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, 0x1000, "aic79xx") == 0)
error = ENOMEM;
if (error == 0) {
*maddr = ioremap_nocache(base_page, base_offset + 256);
if (*maddr == NULL) {
error = ENOMEM;
release_mem_region(start, 0x1000);
} else
*maddr += base_offset;
}
} else
error = ENOMEM;
return (error);
}
int
ahd_pci_map_registers(struct ahd_softc *ahd)
{
uint32_t command;
u_long 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 + 0x100;
ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
command | PCIM_CMD_MEMEN, 4);
if (ahd_pci_test_register_access(ahd) != 0) {
printf("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,
0x1000);
ahd->bshs[0].maddr = NULL;
maddr = NULL;
} else
command |= PCIM_CMD_MEMEN;
} else if (bootverbose) {
printf("aic79xx: PCI%d:%d:%d MEM region 0x%lx "
"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),
base);
}
if (maddr == NULL) {
u_long 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 = base;
ahd->bshs[1].ioport = base2;
command |= PCIM_CMD_PORTEN;
} else {
printf("aic79xx: PCI%d:%d:%d IO regions 0x%lx and 0x%lx"
"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),
base, 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,
SA_SHIRQ, "aic79xx", ahd);
if (error == 0)
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);
}
