#define pr_fmt(fmt) "ipmi_platform: " fmt
#define dev_fmt pr_fmt
#include <linux/types.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/acpi.h>
#include "ipmi_si.h"
#include "ipmi_dmi.h"
static bool platform_registered;
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
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 (ACPI_FAILURE(status)) {
dev_warn(io->dev,
"Unable to claim ACPI GPE %d, running polled\n",
io->irq);
io->irq = 0;
return -EINVAL;
}
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 void ipmi_set_addr_data_and_space(struct resource *r, struct si_sm_io *io)
{
if (resource_type(r) == IORESOURCE_IO)
io->addr_space = IPMI_IO_ADDR_SPACE;
else
io->addr_space = IPMI_MEM_ADDR_SPACE;
io->addr_data = r->start;
}
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_mem_or_io(pdev, 0);
if (!res) {
dev_err(&pdev->dev, "no I/O or memory address\n");
return NULL;
}
ipmi_set_addr_data_and_space(res, io);
io->regspacing = DEFAULT_REGSPACING;
res_second = platform_get_mem_or_io(pdev, 1);
if (res_second && resource_type(res_second) == resource_type(res)) {
if (res_second->start > io->addr_data)
io->regspacing = res_second->start - io->addr_data;
}
return res;
}
static int platform_ipmi_probe(struct platform_device *pdev)
{
struct si_sm_io io;
u8 type, slave_addr, addr_source, regsize, regshift;
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 (addr_source != SI_HARDCODED) {
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:
io.si_info = &ipmi_kcs_si_info;
break;
case SI_SMIC:
io.si_info = &ipmi_smic_si_info;
break;
case SI_BT:
io.si_info = &ipmi_bt_si_info;
break;
case SI_TYPE_INVALID:
return -ENODEV;
default:
dev_err(&pdev->dev, "ipmi-type property is invalid\n");
return -EINVAL;
}
io.regsize = DEFAULT_REGSIZE;
rv = device_property_read_u8(&pdev->dev, "reg-size", ®size);
if (!rv)
io.regsize = regsize;
io.regshift = 0;
rv = device_property_read_u8(&pdev->dev, "reg-shift", ®shift);
if (!rv)
io.regshift = regshift;
if (!ipmi_get_info_from_resources(pdev, &io))
return -EINVAL;
rv = device_property_read_u8(&pdev->dev, "slave-addr", &slave_addr);
if (rv)
io.slave_addr = 0x20;
else
io.slave_addr = slave_addr;
io.irq = platform_get_irq_optional(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: %s: %s %#lx regsize %d spacing %d irq %d\n",
ipmi_addr_src_to_str(addr_source),
(io.addr_space == 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 = &ipmi_kcs_si_info },
{ .type = "ipmi", .compatible = "ipmi-smic", .data = &ipmi_smic_si_info },
{ .type = "ipmi", .compatible = "ipmi-bt", .data = &ipmi_bt_si_info },
{}
};
MODULE_DEVICE_TABLE(of, of_ipmi_match);
static int of_ipmi_probe(struct platform_device *pdev)
{
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");
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_info = device_get_match_data(&pdev->dev);
io.addr_source = SI_DEVICETREE;
io.irq_setup = ipmi_std_irq_setup;
ipmi_set_addr_data_and_space(&resource, &io);
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)
slave_addr = ipmi_dmi_get_slave_addr(io->si_info->type,
io->addr_space,
io->addr_data);
#endif
return slave_addr;
}
static int acpi_ipmi_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct si_sm_io io;
acpi_handle handle;
acpi_status status;
unsigned long long tmp;
struct resource *res;
if (!si_tryacpi)
return -ENODEV;
handle = ACPI_HANDLE(dev);
if (!handle)
return -ENODEV;
memset(&io, 0, sizeof(io));
io.addr_source = SI_ACPI;
dev_info(dev, "probing via ACPI\n");
io.addr_info.acpi_info.acpi_handle = handle;
status = acpi_evaluate_integer(handle, "_IFT", NULL, &tmp);
if (ACPI_FAILURE(status)) {
dev_err(dev, "Could not find ACPI IPMI interface type\n");
return -EINVAL;
}
switch (tmp) {
case 1:
io.si_info = &ipmi_kcs_si_info;
break;
case 2:
io.si_info = &ipmi_smic_si_info;
break;
case 3:
io.si_info = &ipmi_bt_si_info;
break;
case 4:
return -ENODEV;
default:
dev_info(dev, "unknown IPMI type %lld\n", tmp);
return -EINVAL;
}
io.dev = dev;
io.regsize = DEFAULT_REGSIZE;
io.regshift = 0;
res = ipmi_get_info_from_resources(pdev, &io);
if (!res)
return -EINVAL;
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_optional(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);
dev_info(dev, "%pR regsize %d spacing %d irq %d\n",
res, io.regsize, io.regspacing, io.irq);
request_module_nowait("acpi_ipmi");
return ipmi_si_add_smi(&io);
}
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 void ipmi_remove(struct platform_device *pdev)
{
ipmi_si_remove_by_dev(&pdev->dev);
}
static int pdev_match_name(struct device *dev, const void *data)
{
struct platform_device *pdev = to_platform_device(dev);
const char *name = data;
return strcmp(pdev->name, name) == 0;
}
void ipmi_remove_platform_device_by_name(char *name)
{
struct device *dev;
while ((dev = bus_find_device(&platform_bus_type, NULL, name,
pdev_match_name))) {
struct platform_device *pdev = to_platform_device(dev);
platform_device_unregister(pdev);
put_device(dev);
}
}
static const struct platform_device_id si_plat_ids[] = {
{ "dmi-ipmi-si", 0 },
{ "hardcode-ipmi-si", 0 },
{ "hotmod-ipmi-si", 0 },
{ }
};
struct platform_driver ipmi_platform_driver = {
.driver = {
.name = SI_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);
else
platform_registered = true;
}
void ipmi_si_platform_shutdown(void)
{
if (platform_registered)
platform_driver_unregister(&ipmi_platform_driver);
}
