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/*
* The PCI Library -- Direct Configuration access via SylixOS Ports
*
* Copyright (c) 2018 YuJian.Gong <gongyujian@acoinfo.com>
*
* Can be freely distributed and used under the terms of the GNU GPL v2+.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#define _GNU_SOURCE
#define __SYLIXOS_KERNEL
#define __SYLIXOS_PCI_DRV
#include <SylixOS.h>
#include <stdlib.h>
#include <string.h>
#include "internal.h"
static void
sylixos_scan(struct pci_access *a)
{
u8 busmap[256];
int bus;
memset(busmap, 0, sizeof(busmap));
for (bus = 0; bus < PCI_MAX_BUS; bus++)
if (!busmap[bus])
pci_generic_scan_bus(a, busmap, 0, bus);
}
static void
sylixos_config(struct pci_access *a)
{
pci_define_param(a, "sylixos.path", PCI_PATH_SYLIXOS_DEVICE, "Path to the SylixOS PCI device");
}
static int
sylixos_detect(struct pci_access *a)
{
char *name = pci_get_param(a, "sylixos.path");
if (access(name, R_OK))
{
a->warning("Cannot open %s", name);
return 0;
}
a->debug("...using %s", name);
return 1;
}
static void
sylixos_init(struct pci_access *a UNUSED)
{
}
static void
sylixos_cleanup(struct pci_access *a UNUSED)
{
}
static int
sylixos_read(struct pci_dev *d, int pos, byte *buf, int len)
{
int ret = -1;
u8 data_byte = -1;
u16 data_word = -1;
u32 data_dword = -1;
if (!(len == 1 || len == 2 || len == 4))
return pci_generic_block_read(d, pos, buf, len);
if (pos >= 256)
return 0;
switch (len)
{
case 1:
ret = pciConfigInByte(d->bus, d->dev, d->func, pos, &data_byte);
if (ret != ERROR_NONE)
return 0;
buf[0] = (u8)data_byte;
break;
case 2:
ret = pciConfigInWord(d->bus, d->dev, d->func, pos, &data_word);
if (ret != ERROR_NONE)
return 0;
((u16 *) buf)[0] = cpu_to_le16(data_word);
break;
case 4:
ret = pciConfigInDword(d->bus, d->dev, d->func, pos, &data_dword);
if (ret != ERROR_NONE)
return 0;
((u32 *) buf)[0] = cpu_to_le32(data_dword);
break;
}
return 1;
}
static int
sylixos_write(struct pci_dev *d, int pos, byte *buf, int len)
{
int ret = PX_ERROR;
u8 data_byte;
u16 data_word;
u32 data_dword;
if (!(len == 1 || len == 2 || len == 4))
return pci_generic_block_write(d, pos, buf, len);
if (pos >= 256)
return 0;
switch (len)
{
case 1:
data_byte = buf[0];
ret = pciConfigOutByte(d->bus, d->dev, d->func, pos, data_byte);
if (ret != ERROR_NONE)
return 0;
break;
case 2:
data_word = le16_to_cpu(((u16 *) buf)[0]);
ret = pciConfigOutWord(d->bus, d->dev, d->func, pos, data_word);
if (ret != ERROR_NONE)
return 0;
break;
case 4:
data_dword = le32_to_cpu(((u32 *) buf)[0]);
ret = pciConfigOutDword(d->bus, d->dev, d->func, pos, data_dword);
if (ret != ERROR_NONE)
return 0;
break;
}
return 1;
}
struct pci_methods pm_sylixos_device = {
"sylixos-device",
"SylixOS /proc/pci device",
sylixos_config,
sylixos_detect,
sylixos_init,
sylixos_cleanup,
sylixos_scan,
pci_generic_fill_info,
sylixos_read,
sylixos_write,
NULL, // no read_vpd
NULL, // no init_dev
NULL, // no cleanup_dev
};
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