449 lines
10 KiB
C
449 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* ipmi_si_platform.c
|
|
*
|
|
* Handling for platform devices in IPMI (ACPI, OF, and things
|
|
* coming from the platform.
|
|
*/
|
|
|
|
#define pr_fmt(fmt) "ipmi_platform: " fmt
|
|
#define dev_fmt pr_fmt
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/of_irq.h>
|
|
#include <linux/acpi.h>
|
|
#include "ipmi_si.h"
|
|
#include "ipmi_dmi.h"
|
|
|
|
static bool si_tryplatform = true;
|
|
#ifdef CONFIG_ACPI
|
|
static bool si_tryacpi = true;
|
|
#endif
|
|
#ifdef CONFIG_OF
|
|
static bool si_tryopenfirmware = true;
|
|
#endif
|
|
#ifdef CONFIG_DMI
|
|
static bool si_trydmi = true;
|
|
#else
|
|
static bool si_trydmi = false;
|
|
#endif
|
|
|
|
module_param_named(tryplatform, si_tryplatform, bool, 0);
|
|
MODULE_PARM_DESC(tryplatform, "Setting this to zero will disable the"
|
|
" default scan of the interfaces identified via platform"
|
|
" interfaces besides ACPI, OpenFirmware, and DMI");
|
|
#ifdef CONFIG_ACPI
|
|
module_param_named(tryacpi, si_tryacpi, bool, 0);
|
|
MODULE_PARM_DESC(tryacpi, "Setting this to zero will disable the"
|
|
" default scan of the interfaces identified via ACPI");
|
|
#endif
|
|
#ifdef CONFIG_OF
|
|
module_param_named(tryopenfirmware, si_tryopenfirmware, bool, 0);
|
|
MODULE_PARM_DESC(tryopenfirmware, "Setting this to zero will disable the"
|
|
" default scan of the interfaces identified via OpenFirmware");
|
|
#endif
|
|
#ifdef CONFIG_DMI
|
|
module_param_named(trydmi, si_trydmi, bool, 0);
|
|
MODULE_PARM_DESC(trydmi, "Setting this to zero will disable the"
|
|
" default scan of the interfaces identified via DMI");
|
|
#endif
|
|
|
|
#ifdef CONFIG_ACPI
|
|
/* For GPE-type interrupts. */
|
|
static u32 ipmi_acpi_gpe(acpi_handle gpe_device,
|
|
u32 gpe_number, void *context)
|
|
{
|
|
struct si_sm_io *io = context;
|
|
|
|
ipmi_si_irq_handler(io->irq, io->irq_handler_data);
|
|
return ACPI_INTERRUPT_HANDLED;
|
|
}
|
|
|
|
static void acpi_gpe_irq_cleanup(struct si_sm_io *io)
|
|
{
|
|
if (!io->irq)
|
|
return;
|
|
|
|
ipmi_irq_start_cleanup(io);
|
|
acpi_remove_gpe_handler(NULL, io->irq, &ipmi_acpi_gpe);
|
|
}
|
|
|
|
static int acpi_gpe_irq_setup(struct si_sm_io *io)
|
|
{
|
|
acpi_status status;
|
|
|
|
if (!io->irq)
|
|
return 0;
|
|
|
|
status = acpi_install_gpe_handler(NULL,
|
|
io->irq,
|
|
ACPI_GPE_LEVEL_TRIGGERED,
|
|
&ipmi_acpi_gpe,
|
|
io);
|
|
if (status != AE_OK) {
|
|
dev_warn(io->dev,
|
|
"Unable to claim ACPI GPE %d, running polled\n",
|
|
io->irq);
|
|
io->irq = 0;
|
|
return -EINVAL;
|
|
} else {
|
|
io->irq_cleanup = acpi_gpe_irq_cleanup;
|
|
ipmi_irq_finish_setup(io);
|
|
dev_info(io->dev, "Using ACPI GPE %d\n", io->irq);
|
|
return 0;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
static struct resource *
|
|
ipmi_get_info_from_resources(struct platform_device *pdev,
|
|
struct si_sm_io *io)
|
|
{
|
|
struct resource *res, *res_second;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
|
|
if (res) {
|
|
io->addr_type = IPMI_IO_ADDR_SPACE;
|
|
} else {
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (res)
|
|
io->addr_type = IPMI_MEM_ADDR_SPACE;
|
|
}
|
|
if (!res) {
|
|
dev_err(&pdev->dev, "no I/O or memory address\n");
|
|
return NULL;
|
|
}
|
|
io->addr_data = res->start;
|
|
|
|
io->regspacing = DEFAULT_REGSPACING;
|
|
res_second = platform_get_resource(pdev,
|
|
(io->addr_type == IPMI_IO_ADDR_SPACE) ?
|
|
IORESOURCE_IO : IORESOURCE_MEM,
|
|
1);
|
|
if (res_second) {
|
|
if (res_second->start > io->addr_data)
|
|
io->regspacing = res_second->start - io->addr_data;
|
|
}
|
|
io->regsize = DEFAULT_REGSIZE;
|
|
io->regshift = 0;
|
|
|
|
return res;
|
|
}
|
|
|
|
static int platform_ipmi_probe(struct platform_device *pdev)
|
|
{
|
|
struct si_sm_io io;
|
|
u8 type, slave_addr, addr_source;
|
|
int rv;
|
|
|
|
rv = device_property_read_u8(&pdev->dev, "addr-source", &addr_source);
|
|
if (rv)
|
|
addr_source = SI_PLATFORM;
|
|
if (addr_source >= SI_LAST)
|
|
return -EINVAL;
|
|
|
|
if (addr_source == SI_SMBIOS) {
|
|
if (!si_trydmi)
|
|
return -ENODEV;
|
|
} else {
|
|
if (!si_tryplatform)
|
|
return -ENODEV;
|
|
}
|
|
|
|
rv = device_property_read_u8(&pdev->dev, "ipmi-type", &type);
|
|
if (rv)
|
|
return -ENODEV;
|
|
|
|
memset(&io, 0, sizeof(io));
|
|
io.addr_source = addr_source;
|
|
dev_info(&pdev->dev, "probing via %s\n",
|
|
ipmi_addr_src_to_str(addr_source));
|
|
|
|
switch (type) {
|
|
case SI_KCS:
|
|
case SI_SMIC:
|
|
case SI_BT:
|
|
io.si_type = type;
|
|
break;
|
|
default:
|
|
dev_err(&pdev->dev, "ipmi-type property is invalid\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!ipmi_get_info_from_resources(pdev, &io))
|
|
return -EINVAL;
|
|
|
|
rv = device_property_read_u8(&pdev->dev, "slave-addr", &slave_addr);
|
|
if (rv) {
|
|
dev_warn(&pdev->dev, "device has no slave-addr property\n");
|
|
io.slave_addr = 0x20;
|
|
} else {
|
|
io.slave_addr = slave_addr;
|
|
}
|
|
|
|
io.irq = platform_get_irq(pdev, 0);
|
|
if (io.irq > 0)
|
|
io.irq_setup = ipmi_std_irq_setup;
|
|
else
|
|
io.irq = 0;
|
|
|
|
io.dev = &pdev->dev;
|
|
|
|
pr_info("ipmi_si: SMBIOS: %s %#lx regsize %d spacing %d irq %d\n",
|
|
(io.addr_type == IPMI_IO_ADDR_SPACE) ? "io" : "mem",
|
|
io.addr_data, io.regsize, io.regspacing, io.irq);
|
|
|
|
ipmi_si_add_smi(&io);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id of_ipmi_match[] = {
|
|
{ .type = "ipmi", .compatible = "ipmi-kcs",
|
|
.data = (void *)(unsigned long) SI_KCS },
|
|
{ .type = "ipmi", .compatible = "ipmi-smic",
|
|
.data = (void *)(unsigned long) SI_SMIC },
|
|
{ .type = "ipmi", .compatible = "ipmi-bt",
|
|
.data = (void *)(unsigned long) SI_BT },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, of_ipmi_match);
|
|
|
|
static int of_ipmi_probe(struct platform_device *pdev)
|
|
{
|
|
const struct of_device_id *match;
|
|
struct si_sm_io io;
|
|
struct resource resource;
|
|
const __be32 *regsize, *regspacing, *regshift;
|
|
struct device_node *np = pdev->dev.of_node;
|
|
int ret;
|
|
int proplen;
|
|
|
|
if (!si_tryopenfirmware)
|
|
return -ENODEV;
|
|
|
|
dev_info(&pdev->dev, "probing via device tree\n");
|
|
|
|
match = of_match_device(of_ipmi_match, &pdev->dev);
|
|
if (!match)
|
|
return -ENODEV;
|
|
|
|
if (!of_device_is_available(np))
|
|
return -EINVAL;
|
|
|
|
ret = of_address_to_resource(np, 0, &resource);
|
|
if (ret) {
|
|
dev_warn(&pdev->dev, "invalid address from OF\n");
|
|
return ret;
|
|
}
|
|
|
|
regsize = of_get_property(np, "reg-size", &proplen);
|
|
if (regsize && proplen != 4) {
|
|
dev_warn(&pdev->dev, "invalid regsize from OF\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
regspacing = of_get_property(np, "reg-spacing", &proplen);
|
|
if (regspacing && proplen != 4) {
|
|
dev_warn(&pdev->dev, "invalid regspacing from OF\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
regshift = of_get_property(np, "reg-shift", &proplen);
|
|
if (regshift && proplen != 4) {
|
|
dev_warn(&pdev->dev, "invalid regshift from OF\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
memset(&io, 0, sizeof(io));
|
|
io.si_type = (enum si_type) match->data;
|
|
io.addr_source = SI_DEVICETREE;
|
|
io.irq_setup = ipmi_std_irq_setup;
|
|
|
|
if (resource.flags & IORESOURCE_IO)
|
|
io.addr_type = IPMI_IO_ADDR_SPACE;
|
|
else
|
|
io.addr_type = IPMI_MEM_ADDR_SPACE;
|
|
|
|
io.addr_data = resource.start;
|
|
|
|
io.regsize = regsize ? be32_to_cpup(regsize) : DEFAULT_REGSIZE;
|
|
io.regspacing = regspacing ? be32_to_cpup(regspacing) : DEFAULT_REGSPACING;
|
|
io.regshift = regshift ? be32_to_cpup(regshift) : 0;
|
|
|
|
io.irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
|
|
io.dev = &pdev->dev;
|
|
|
|
dev_dbg(&pdev->dev, "addr 0x%lx regsize %d spacing %d irq %d\n",
|
|
io.addr_data, io.regsize, io.regspacing, io.irq);
|
|
|
|
return ipmi_si_add_smi(&io);
|
|
}
|
|
#else
|
|
#define of_ipmi_match NULL
|
|
static int of_ipmi_probe(struct platform_device *dev)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_ACPI
|
|
static int find_slave_address(struct si_sm_io *io, int slave_addr)
|
|
{
|
|
#ifdef CONFIG_IPMI_DMI_DECODE
|
|
if (!slave_addr) {
|
|
u32 flags = IORESOURCE_IO;
|
|
|
|
if (io->addr_type == IPMI_MEM_ADDR_SPACE)
|
|
flags = IORESOURCE_MEM;
|
|
|
|
slave_addr = ipmi_dmi_get_slave_addr(io->si_type, flags,
|
|
io->addr_data);
|
|
}
|
|
#endif
|
|
|
|
return slave_addr;
|
|
}
|
|
|
|
static int acpi_ipmi_probe(struct platform_device *pdev)
|
|
{
|
|
struct si_sm_io io;
|
|
acpi_handle handle;
|
|
acpi_status status;
|
|
unsigned long long tmp;
|
|
struct resource *res;
|
|
int rv = -EINVAL;
|
|
|
|
if (!si_tryacpi)
|
|
return -ENODEV;
|
|
|
|
handle = ACPI_HANDLE(&pdev->dev);
|
|
if (!handle)
|
|
return -ENODEV;
|
|
|
|
memset(&io, 0, sizeof(io));
|
|
io.addr_source = SI_ACPI;
|
|
dev_info(&pdev->dev, "probing via ACPI\n");
|
|
|
|
io.addr_info.acpi_info.acpi_handle = handle;
|
|
|
|
/* _IFT tells us the interface type: KCS, BT, etc */
|
|
status = acpi_evaluate_integer(handle, "_IFT", NULL, &tmp);
|
|
if (ACPI_FAILURE(status)) {
|
|
dev_err(&pdev->dev,
|
|
"Could not find ACPI IPMI interface type\n");
|
|
goto err_free;
|
|
}
|
|
|
|
switch (tmp) {
|
|
case 1:
|
|
io.si_type = SI_KCS;
|
|
break;
|
|
case 2:
|
|
io.si_type = SI_SMIC;
|
|
break;
|
|
case 3:
|
|
io.si_type = SI_BT;
|
|
break;
|
|
case 4: /* SSIF, just ignore */
|
|
rv = -ENODEV;
|
|
goto err_free;
|
|
default:
|
|
dev_info(&pdev->dev, "unknown IPMI type %lld\n", tmp);
|
|
goto err_free;
|
|
}
|
|
|
|
res = ipmi_get_info_from_resources(pdev, &io);
|
|
if (!res) {
|
|
rv = -EINVAL;
|
|
goto err_free;
|
|
}
|
|
|
|
/* If _GPE exists, use it; otherwise use standard interrupts */
|
|
status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp);
|
|
if (ACPI_SUCCESS(status)) {
|
|
io.irq = tmp;
|
|
io.irq_setup = acpi_gpe_irq_setup;
|
|
} else {
|
|
int irq = platform_get_irq(pdev, 0);
|
|
|
|
if (irq > 0) {
|
|
io.irq = irq;
|
|
io.irq_setup = ipmi_std_irq_setup;
|
|
}
|
|
}
|
|
|
|
io.slave_addr = find_slave_address(&io, io.slave_addr);
|
|
|
|
io.dev = &pdev->dev;
|
|
|
|
dev_info(io.dev, "%pR regsize %d spacing %d irq %d\n",
|
|
res, io.regsize, io.regspacing, io.irq);
|
|
|
|
return ipmi_si_add_smi(&io);
|
|
|
|
err_free:
|
|
return rv;
|
|
}
|
|
|
|
static const struct acpi_device_id acpi_ipmi_match[] = {
|
|
{ "IPI0001", 0 },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, acpi_ipmi_match);
|
|
#else
|
|
static int acpi_ipmi_probe(struct platform_device *dev)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
#endif
|
|
|
|
static int ipmi_probe(struct platform_device *pdev)
|
|
{
|
|
if (pdev->dev.of_node && of_ipmi_probe(pdev) == 0)
|
|
return 0;
|
|
|
|
if (acpi_ipmi_probe(pdev) == 0)
|
|
return 0;
|
|
|
|
return platform_ipmi_probe(pdev);
|
|
}
|
|
|
|
static int ipmi_remove(struct platform_device *pdev)
|
|
{
|
|
return ipmi_si_remove_by_dev(&pdev->dev);
|
|
}
|
|
|
|
static const struct platform_device_id si_plat_ids[] = {
|
|
{ "dmi-ipmi-si", 0 },
|
|
{ }
|
|
};
|
|
|
|
struct platform_driver ipmi_platform_driver = {
|
|
.driver = {
|
|
.name = DEVICE_NAME,
|
|
.of_match_table = of_ipmi_match,
|
|
.acpi_match_table = ACPI_PTR(acpi_ipmi_match),
|
|
},
|
|
.probe = ipmi_probe,
|
|
.remove = ipmi_remove,
|
|
.id_table = si_plat_ids
|
|
};
|
|
|
|
void ipmi_si_platform_init(void)
|
|
{
|
|
int rv = platform_driver_register(&ipmi_platform_driver);
|
|
if (rv)
|
|
pr_err("Unable to register driver: %d\n", rv);
|
|
}
|
|
|
|
void ipmi_si_platform_shutdown(void)
|
|
{
|
|
platform_driver_unregister(&ipmi_platform_driver);
|
|
}
|