From 9d70029edbbf23474e022ac77700269807d64b0d Mon Sep 17 00:00:00 2001
From: Corey Minyard <cminyard@mvista.com>
Date: Tue, 12 Sep 2017 22:55:57 -0500
Subject: [PATCH] ipmi_si: Move platform device handling to another file
Git-commit: 9d70029edbbf23474e022ac77700269807d64b0d
Patch-mainline: v4.15-rc1
References: FATE#326156
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Stephen Rothwell <sfr@canb.auug.org.au> fixed an issue with the
include files
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/char/ipmi/Makefile | 2 +-
drivers/char/ipmi/ipmi_si.h | 6 +
drivers/char/ipmi/ipmi_si_intf.c | 592 +-------------------------
drivers/char/ipmi/ipmi_si_platform.c | 602 +++++++++++++++++++++++++++
4 files changed, 613 insertions(+), 589 deletions(-)
create mode 100644 drivers/char/ipmi/ipmi_si_platform.c
diff --git a/drivers/char/ipmi/Makefile b/drivers/char/ipmi/Makefile
index ebd728497b23..fa3858f472ac 100644
--- a/drivers/char/ipmi/Makefile
+++ b/drivers/char/ipmi/Makefile
@@ -3,7 +3,7 @@
#
ipmi_si-y := ipmi_si_intf.o ipmi_kcs_sm.o ipmi_smic_sm.o ipmi_bt_sm.o \
- ipmi_si_hotmod.o ipmi_si_hardcode.o
+ ipmi_si_hotmod.o ipmi_si_hardcode.o ipmi_si_platform.o
obj-$(CONFIG_IPMI_HANDLER) += ipmi_msghandler.o
obj-$(CONFIG_IPMI_DEVICE_INTERFACE) += ipmi_devintf.o
diff --git a/drivers/char/ipmi/ipmi_si.h b/drivers/char/ipmi/ipmi_si.h
index 1dbd58afc2d7..ff9a30a1ead5 100644
--- a/drivers/char/ipmi/ipmi_si.h
+++ b/drivers/char/ipmi/ipmi_si.h
@@ -14,6 +14,8 @@
#define DEFAULT_REGSPACING 1
#define DEFAULT_REGSIZE 1
+#define DEVICE_NAME "ipmi_si"
+
int ipmi_si_add_smi(struct si_sm_io *io);
irqreturn_t ipmi_si_irq_handler(int irq, void *data);
void ipmi_irq_start_cleanup(struct si_sm_io *io);
@@ -23,3 +25,7 @@ int ipmi_si_remove_by_dev(struct device *dev);
void ipmi_si_remove_by_data(int addr_space, enum si_type si_type,
unsigned long addr);
int ipmi_si_hardcode_find_bmc(void);
+void ipmi_si_platform_init(void);
+void ipmi_si_platform_shutdown(void);
+
+extern struct platform_driver ipmi_platform_driver;
diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index 58f0ebbcd342..bfc052bdbdd7 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -61,15 +61,8 @@
#include <linux/ipmi_smi.h>
#include <asm/io.h>
#include "ipmi_si.h"
-#include "ipmi_dmi.h"
-#include <linux/dmi.h>
#include <linux/string.h>
#include <linux/ctype.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>
#ifdef CONFIG_PARISC
#include <asm/hardware.h> /* for register_parisc_driver() stuff */
@@ -106,10 +99,6 @@ enum si_intf_state {
static const char * const si_to_str[] = { "kcs", "smic", "bt" };
-#define DEVICE_NAME "ipmi_si"
-
-static struct platform_driver ipmi_driver;
-
static int initialized;
/*
@@ -1274,33 +1263,12 @@ static LIST_HEAD(smi_infos);
static DEFINE_MUTEX(smi_infos_lock);
static int smi_num; /* Used to sequence the SMIs */
-#ifdef CONFIG_ACPI
-static bool si_tryacpi = true;
-#endif
-#ifdef CONFIG_DMI
-static bool si_trydmi = true;
-#endif
-static bool si_tryplatform = true;
#ifdef CONFIG_PCI
static bool si_trypci = true;
#endif
static const char * const addr_space_to_str[] = { "i/o", "mem" };
-#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_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
-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 like openfirmware");
#ifdef CONFIG_PCI
module_param_named(trypci, si_trypci, bool, 0);
MODULE_PARM_DESC(trypci, "Setting this to zero will disable the"
@@ -1626,310 +1594,6 @@ static struct smi_info *smi_info_alloc(void)
return info;
}
-#ifdef CONFIG_ACPI
-
-/*
- * Once we get an ACPI failure, we don't try any more, because we go
- * through the tables sequentially. Once we don't find a table, there
- * are no more.
- */
-static int acpi_failure;
-
-/* 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;
- }
-}
-
-/*
- * Defined at
- * http://h21007.www2.hp.com/portal/download/files/unprot/hpspmi.pdf
- */
-struct SPMITable {
- s8 Signature[4];
- u32 Length;
- u8 Revision;
- u8 Checksum;
- s8 OEMID[6];
- s8 OEMTableID[8];
- s8 OEMRevision[4];
- s8 CreatorID[4];
- s8 CreatorRevision[4];
- u8 InterfaceType;
- u8 IPMIlegacy;
- s16 SpecificationRevision;
-
- /*
- * Bit 0 - SCI interrupt supported
- * Bit 1 - I/O APIC/SAPIC
- */
- u8 InterruptType;
-
- /*
- * If bit 0 of InterruptType is set, then this is the SCI
- * interrupt in the GPEx_STS register.
- */
- u8 GPE;
-
- s16 Reserved;
-
- /*
- * If bit 1 of InterruptType is set, then this is the I/O
- * APIC/SAPIC interrupt.
- */
- u32 GlobalSystemInterrupt;
-
- /* The actual register address. */
- struct acpi_generic_address addr;
-
- u8 UID[4];
-
- s8 spmi_id[1]; /* A '\0' terminated array starts here. */
-};
-
-static int try_init_spmi(struct SPMITable *spmi)
-{
- struct si_sm_io io;
-
- if (spmi->IPMIlegacy != 1) {
- pr_info(PFX "Bad SPMI legacy %d\n", spmi->IPMIlegacy);
- return -ENODEV;
- }
-
- memset(&io, 0, sizeof(io));
- io.addr_source = SI_SPMI;
- pr_info(PFX "probing via SPMI\n");
-
- /* Figure out the interface type. */
- switch (spmi->InterfaceType) {
- case 1: /* KCS */
- io.si_type = SI_KCS;
- break;
- case 2: /* SMIC */
- io.si_type = SI_SMIC;
- break;
- case 3: /* BT */
- io.si_type = SI_BT;
- break;
- case 4: /* SSIF, just ignore */
- return -EIO;
- default:
- pr_info(PFX "Unknown ACPI/SPMI SI type %d\n",
- spmi->InterfaceType);
- return -EIO;
- }
-
- if (spmi->InterruptType & 1) {
- /* We've got a GPE interrupt. */
- io.irq = spmi->GPE;
- io.irq_setup = acpi_gpe_irq_setup;
- } else if (spmi->InterruptType & 2) {
- /* We've got an APIC/SAPIC interrupt. */
- io.irq = spmi->GlobalSystemInterrupt;
- io.irq_setup = ipmi_std_irq_setup;
- } else {
- /* Use the default interrupt setting. */
- io.irq = 0;
- io.irq_setup = NULL;
- }
-
- if (spmi->addr.bit_width) {
- /* A (hopefully) properly formed register bit width. */
- io.regspacing = spmi->addr.bit_width / 8;
- } else {
- io.regspacing = DEFAULT_REGSPACING;
- }
- io.regsize = io.regspacing;
- io.regshift = spmi->addr.bit_offset;
-
- if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
- io.addr_type = IPMI_MEM_ADDR_SPACE;
- } else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
- io.addr_type = IPMI_IO_ADDR_SPACE;
- } else {
- pr_warn(PFX "Unknown ACPI I/O Address type\n");
- return -EIO;
- }
- io.addr_data = spmi->addr.address;
-
- pr_info("ipmi_si: SPMI: %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);
-
- return ipmi_si_add_smi(&io);
-}
-
-static void spmi_find_bmc(void)
-{
- acpi_status status;
- struct SPMITable *spmi;
- int i;
-
- if (acpi_disabled)
- return;
-
- if (acpi_failure)
- return;
-
- for (i = 0; ; i++) {
- status = acpi_get_table(ACPI_SIG_SPMI, i+1,
- (struct acpi_table_header **)&spmi);
- if (status != AE_OK)
- return;
-
- try_init_spmi(spmi);
- }
-}
-#endif
-
-#if defined(CONFIG_DMI) || defined(CONFIG_ACPI)
-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;
-}
-
-#endif
-
-#ifdef CONFIG_DMI
-static int dmi_ipmi_probe(struct platform_device *pdev)
-{
- struct si_sm_io io;
- u8 type, slave_addr;
- int rv;
-
- if (!si_trydmi)
- return -ENODEV;
-
- rv = device_property_read_u8(&pdev->dev, "ipmi-type", &type);
- if (rv)
- return -ENODEV;
-
- memset(&io, 0, sizeof(io));
- io.addr_source = SI_SMBIOS;
- pr_info(PFX "probing via SMBIOS\n");
-
- switch (type) {
- case IPMI_DMI_TYPE_KCS:
- io.si_type = SI_KCS;
- break;
- case IPMI_DMI_TYPE_SMIC:
- io.si_type = SI_SMIC;
- break;
- case IPMI_DMI_TYPE_BT:
- io.si_type = SI_BT;
- break;
- default:
- return -EINVAL;
- }
-
- if (!ipmi_get_info_from_resources(pdev, &io)) {
- rv = -EINVAL;
- goto err_free;
- }
-
- rv = device_property_read_u8(&pdev->dev, "slave-addr", &slave_addr);
- if (rv) {
- dev_warn(&pdev->dev, "device has no slave-addr property");
- 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;
-
-err_free:
- return rv;
-}
-#else
-static int dmi_ipmi_probe(struct platform_device *pdev)
-{
- return -ENODEV;
-}
-#endif /* CONFIG_DMI */
-
#ifdef CONFIG_PCI
#define PCI_ERMC_CLASSCODE 0x0C0700
@@ -2064,243 +1728,6 @@ static struct pci_driver ipmi_pci_driver = {
};
#endif /* CONFIG_PCI */
-#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;
-
- 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, PFX "invalid address from OF\n");
- return ret;
- }
-
- regsize = of_get_property(np, "reg-size", &proplen);
- if (regsize && proplen != 4) {
- dev_warn(&pdev->dev, PFX "invalid regsize from OF\n");
- return -EINVAL;
- }
-
- regspacing = of_get_property(np, "reg-spacing", &proplen);
- if (regspacing && proplen != 4) {
- dev_warn(&pdev->dev, PFX "invalid regspacing from OF\n");
- return -EINVAL;
- }
-
- regshift = of_get_property(np, "reg-shift", &proplen);
- if (regshift && proplen != 4) {
- dev_warn(&pdev->dev, PFX "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) {
- int type = -1;
- u32 flags = IORESOURCE_IO;
-
- switch (io->si_type) {
- case SI_KCS:
- type = IPMI_DMI_TYPE_KCS;
- break;
- case SI_BT:
- type = IPMI_DMI_TYPE_BT;
- break;
- case SI_SMIC:
- type = IPMI_DMI_TYPE_SMIC;
- break;
- }
-
- if (io->addr_type == IPMI_MEM_ADDR_SPACE)
- flags = IORESOURCE_MEM;
-
- slave_addr = ipmi_dmi_get_slave_addr(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, PFX "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 dmi_ipmi_probe(pdev);
-}
-
-static int ipmi_remove(struct platform_device *pdev)
-{
- return ipmi_si_remove_by_dev(&pdev->dev);
-}
-
-static struct platform_driver ipmi_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,
-};
-
#ifdef CONFIG_PARISC
static int __init ipmi_parisc_probe(struct parisc_device *dev)
{
@@ -3038,7 +2465,7 @@ static int try_smi_init(struct smi_info *new_smi)
goto out_err;
}
new_smi->io.dev = &new_smi->pdev->dev;
- new_smi->io.dev->driver = &ipmi_driver.driver;
+ new_smi->io.dev->driver = &ipmi_platform_driver.driver;
/* Nulled by device_add() */
new_smi->io.dev->init_name = init_name;
}
@@ -3233,20 +2660,14 @@ static int init_ipmi_si(void)
if (initialized)
return 0;
- if (si_tryplatform) {
- rv = platform_driver_register(&ipmi_driver);
- if (rv) {
- pr_err(PFX "Unable to register driver: %d\n", rv);
- return rv;
- }
- }
-
pr_info("IPMI System Interface driver.\n");
/* If the user gave us a device, they presumably want us to use it */
if (!ipmi_si_hardcode_find_bmc())
goto do_scan;
+ ipmi_si_platform_init();
+
#ifdef CONFIG_PCI
if (si_trypci) {
rv = pci_register_driver(&ipmi_pci_driver);
@@ -3257,11 +2678,6 @@ static int init_ipmi_si(void)
}
#endif
-#ifdef CONFIG_ACPI
- if (si_tryacpi)
- spmi_find_bmc();
-#endif
-
#ifdef CONFIG_PARISC
register_parisc_driver(&ipmi_parisc_driver);
parisc_registered = true;
@@ -3430,7 +2846,7 @@ static void cleanup_ipmi_si(void)
unregister_parisc_driver(&ipmi_parisc_driver);
#endif
- platform_driver_unregister(&ipmi_driver);
+ ipmi_si_platform_shutdown();
mutex_lock(&smi_infos_lock);
list_for_each_entry_safe(e, tmp_e, &smi_infos, link)
diff --git a/drivers/char/ipmi/ipmi_si_platform.c b/drivers/char/ipmi/ipmi_si_platform.c
new file mode 100644
index 000000000000..cf5c3e5e72e2
--- /dev/null
+++ b/drivers/char/ipmi/ipmi_si_platform.c
@@ -0,0 +1,602 @@
+/*
+ * ipmi_si_platform.c
+ *
+ * Handling for platform devices in IPMI (ACPI, OF, and things
+ * coming from the platform.
+ */
+#include <linux/types.h>
+#include <linux/module.h>
+#include "ipmi_dmi.h"
+#include <linux/dmi.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"
+
+#define PFX "ipmi_platform: "
+
+static bool si_tryplatform = true;
+#ifdef CONFIG_ACPI
+static bool si_tryacpi = true;
+#endif
+#ifdef CONFIG_DMI
+static bool si_trydmi = true;
+#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 like openfirmware");
+#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_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
+
+/*
+ * Once we get an ACPI failure, we don't try any more, because we go
+ * through the tables sequentially. Once we don't find a table, there
+ * are no more.
+ */
+static int acpi_failure;
+
+/* 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;
+ }
+}
+
+/*
+ * Defined at
+ * http://h21007.www2.hp.com/portal/download/files/unprot/hpspmi.pdf
+ */
+struct SPMITable {
+ s8 Signature[4];
+ u32 Length;
+ u8 Revision;
+ u8 Checksum;
+ s8 OEMID[6];
+ s8 OEMTableID[8];
+ s8 OEMRevision[4];
+ s8 CreatorID[4];
+ s8 CreatorRevision[4];
+ u8 InterfaceType;
+ u8 IPMIlegacy;
+ s16 SpecificationRevision;
+
+ /*
+ * Bit 0 - SCI interrupt supported
+ * Bit 1 - I/O APIC/SAPIC
+ */
+ u8 InterruptType;
+
+ /*
+ * If bit 0 of InterruptType is set, then this is the SCI
+ * interrupt in the GPEx_STS register.
+ */
+ u8 GPE;
+
+ s16 Reserved;
+
+ /*
+ * If bit 1 of InterruptType is set, then this is the I/O
+ * APIC/SAPIC interrupt.
+ */
+ u32 GlobalSystemInterrupt;
+
+ /* The actual register address. */
+ struct acpi_generic_address addr;
+
+ u8 UID[4];
+
+ s8 spmi_id[1]; /* A '\0' terminated array starts here. */
+};
+
+static int try_init_spmi(struct SPMITable *spmi)
+{
+ struct si_sm_io io;
+
+ if (spmi->IPMIlegacy != 1) {
+ pr_info(PFX "Bad SPMI legacy %d\n", spmi->IPMIlegacy);
+ return -ENODEV;
+ }
+
+ memset(&io, 0, sizeof(io));
+ io.addr_source = SI_SPMI;
+ pr_info(PFX "probing via SPMI\n");
+
+ /* Figure out the interface type. */
+ switch (spmi->InterfaceType) {
+ case 1: /* KCS */
+ io.si_type = SI_KCS;
+ break;
+ case 2: /* SMIC */
+ io.si_type = SI_SMIC;
+ break;
+ case 3: /* BT */
+ io.si_type = SI_BT;
+ break;
+ case 4: /* SSIF, just ignore */
+ return -EIO;
+ default:
+ pr_info(PFX "Unknown ACPI/SPMI SI type %d\n",
+ spmi->InterfaceType);
+ return -EIO;
+ }
+
+ if (spmi->InterruptType & 1) {
+ /* We've got a GPE interrupt. */
+ io.irq = spmi->GPE;
+ io.irq_setup = acpi_gpe_irq_setup;
+ } else if (spmi->InterruptType & 2) {
+ /* We've got an APIC/SAPIC interrupt. */
+ io.irq = spmi->GlobalSystemInterrupt;
+ io.irq_setup = ipmi_std_irq_setup;
+ } else {
+ /* Use the default interrupt setting. */
+ io.irq = 0;
+ io.irq_setup = NULL;
+ }
+
+ if (spmi->addr.bit_width) {
+ /* A (hopefully) properly formed register bit width. */
+ io.regspacing = spmi->addr.bit_width / 8;
+ } else {
+ io.regspacing = DEFAULT_REGSPACING;
+ }
+ io.regsize = io.regspacing;
+ io.regshift = spmi->addr.bit_offset;
+
+ if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
+ io.addr_type = IPMI_MEM_ADDR_SPACE;
+ } else if (spmi->addr.space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
+ io.addr_type = IPMI_IO_ADDR_SPACE;
+ } else {
+ pr_warn(PFX "Unknown ACPI I/O Address type\n");
+ return -EIO;
+ }
+ io.addr_data = spmi->addr.address;
+
+ pr_info("ipmi_si: SPMI: %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);
+
+ return ipmi_si_add_smi(&io);
+}
+
+static void spmi_find_bmc(void)
+{
+ acpi_status status;
+ struct SPMITable *spmi;
+ int i;
+
+ if (acpi_disabled)
+ return;
+
+ if (acpi_failure)
+ return;
+
+ for (i = 0; ; i++) {
+ status = acpi_get_table(ACPI_SIG_SPMI, i+1,
+ (struct acpi_table_header **)&spmi);
+ if (status != AE_OK)
+ return;
+
+ try_init_spmi(spmi);
+ }
+}
+#endif
+
+#if defined(CONFIG_DMI) || defined(CONFIG_ACPI)
+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;
+}
+
+#endif
+
+#ifdef CONFIG_DMI
+static int dmi_ipmi_probe(struct platform_device *pdev)
+{
+ struct si_sm_io io;
+ u8 type, slave_addr;
+ int rv;
+
+ if (!si_trydmi)
+ return -ENODEV;
+
+ rv = device_property_read_u8(&pdev->dev, "ipmi-type", &type);
+ if (rv)
+ return -ENODEV;
+
+ memset(&io, 0, sizeof(io));
+ io.addr_source = SI_SMBIOS;
+ pr_info(PFX "probing via SMBIOS\n");
+
+ switch (type) {
+ case IPMI_DMI_TYPE_KCS:
+ io.si_type = SI_KCS;
+ break;
+ case IPMI_DMI_TYPE_SMIC:
+ io.si_type = SI_SMIC;
+ break;
+ case IPMI_DMI_TYPE_BT:
+ io.si_type = SI_BT;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (!ipmi_get_info_from_resources(pdev, &io)) {
+ rv = -EINVAL;
+ goto err_free;
+ }
+
+ rv = device_property_read_u8(&pdev->dev, "slave-addr", &slave_addr);
+ if (rv) {
+ dev_warn(&pdev->dev, "device has no slave-addr property");
+ 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;
+
+err_free:
+ return rv;
+}
+#else
+static int dmi_ipmi_probe(struct platform_device *pdev)
+{
+ return -ENODEV;
+}
+#endif /* CONFIG_DMI */
+
+#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;
+
+ 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, PFX "invalid address from OF\n");
+ return ret;
+ }
+
+ regsize = of_get_property(np, "reg-size", &proplen);
+ if (regsize && proplen != 4) {
+ dev_warn(&pdev->dev, PFX "invalid regsize from OF\n");
+ return -EINVAL;
+ }
+
+ regspacing = of_get_property(np, "reg-spacing", &proplen);
+ if (regspacing && proplen != 4) {
+ dev_warn(&pdev->dev, PFX "invalid regspacing from OF\n");
+ return -EINVAL;
+ }
+
+ regshift = of_get_property(np, "reg-shift", &proplen);
+ if (regshift && proplen != 4) {
+ dev_warn(&pdev->dev, PFX "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) {
+ int type = -1;
+ u32 flags = IORESOURCE_IO;
+
+ switch (io->si_type) {
+ case SI_KCS:
+ type = IPMI_DMI_TYPE_KCS;
+ break;
+ case SI_BT:
+ type = IPMI_DMI_TYPE_BT;
+ break;
+ case SI_SMIC:
+ type = IPMI_DMI_TYPE_SMIC;
+ break;
+ }
+
+ if (io->addr_type == IPMI_MEM_ADDR_SPACE)
+ flags = IORESOURCE_MEM;
+
+ slave_addr = ipmi_dmi_get_slave_addr(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, PFX "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 dmi_ipmi_probe(pdev);
+}
+
+static int ipmi_remove(struct platform_device *pdev)
+{
+ return ipmi_si_remove_by_dev(&pdev->dev);
+}
+
+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,
+};
+
+void ipmi_si_platform_init(void)
+{
+ if (si_tryplatform) {
+ int rv = platform_driver_register(&ipmi_platform_driver);
+ if (rv)
+ pr_err(PFX "Unable to register driver: %d\n", rv);
+ }
+
+#ifdef CONFIG_ACPI
+ if (si_tryacpi)
+ spmi_find_bmc();
+#endif
+
+}
+
+void ipmi_si_platform_shutdown(void)
+{
+ platform_driver_unregister(&ipmi_platform_driver);
+}
--
2.19.2