The last line of PARISC machines (C8000, RP34x0, etc.) have a BMC for
controlling temperature, fan speed and other stuff. The BMC is connected
via a special bus and listed in the firmware device tree. This change
adds support for these BMCs to the IPMI driver.
Signed-off-by: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
---
This is the second try to get this change integrated. If you see
any problems with this patch, please give me hints how to improve
this patch.
drivers/char/ipmi/ipmi_si_intf.c | 77 ++++++++++++++++++++++++++++++++++++++
1 file changed, 77 insertions(+)
diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index af4b23f..b017b8a 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -71,6 +71,11 @@
#include <linux/of_address.h>
#include <linux/of_irq.h>
+#ifdef CONFIG_PARISC
+#include <asm/hardware.h> /* for register_parisc_driver() stuff */
+#include <asm/parisc-device.h>
+#endif
+
#define PFX "ipmi_si: "
/* Measure times between events in the driver. */
@@ -298,6 +303,9 @@ static int pci_registered;
#ifdef CONFIG_ACPI
static int pnp_registered;
#endif
+#ifdef CONFIG_PARISC
+static int parisc_registered;
+#endif
static unsigned int kipmid_max_busy_us[SI_MAX_PARMS];
static int num_max_busy_us;
@@ -2697,6 +2705,64 @@ static struct platform_driver ipmi_driver = {
.remove = ipmi_remove,
};
+#ifdef CONFIG_PARISC
+static int ipmi_parisc_probe(struct parisc_device *dev)
+{
+ struct smi_info *info;
+
+ info = kzalloc(sizeof(*info), GFP_KERNEL);
+
+ if (!info) {
+ dev_err(&dev->dev,
+ "could not allocate memory for PARISC probe\n");
+ return -ENOMEM;
+ }
+
+ info->si_type = SI_KCS;
+ info->addr_source = SI_DEVICETREE;
+ info->io_setup = mem_setup;
+ info->io.addr_type = IPMI_MEM_ADDR_SPACE;
+ info->io.addr_data = dev->hpa.start;
+ info->io.regsize = 1;
+ info->io.regspacing = 1;
+ info->io.regshift = 0;
+ info->irq = 0; /* no interrupt */
+ info->irq_setup = NULL;
+ info->dev = &dev->dev;
+
+ dev_dbg(&dev->dev, "addr 0x%lx regsize %d spacing %d irq %d\n",
+ info->io.addr_data, info->io.regsize, info->io.regspacing,
+ info->irq);
+
+ dev_set_drvdata(&dev->dev, info);
+
+ if (add_smi(info)) {
+ kfree(info);
+ return -EBUSY;
+ }
+
+ return 0;
+}
+
+static int ipmi_parisc_remove(struct parisc_device *dev)
+{
+ cleanup_one_si(dev_get_drvdata(&dev->dev));
+ return 0;
+}
+
+static struct parisc_device_id ipmi_parisc_tbl[] = {
+ { HPHW_MC, HVERSION_REV_ANY_ID, 0x004, 0xC0 },
+ { 0, }
+};
+
+static struct parisc_driver ipmi_parisc_driver = {
+ .name = "ipmi",
+ .id_table = ipmi_parisc_tbl,
+ .probe = ipmi_parisc_probe,
+ .remove = ipmi_parisc_remove,
+};
+#endif /* CONFIG_PARISC */
+
static int wait_for_msg_done(struct smi_info *smi_info)
{
enum si_sm_result smi_result;
@@ -3462,6 +3528,13 @@ static int init_ipmi_si(void)
spmi_find_bmc();
#endif
+#ifdef CONFIG_PARISC
+ register_parisc_driver(&ipmi_parisc_driver);
+ parisc_registered = 1;
+ /* poking PC IO addresses will crash machine, don't do it */
+ si_trydefaults = 0;
+#endif
+
/* We prefer devices with interrupts, but in the case of a machine
with multiple BMCs we assume that there will be several instances
of a given type so if we succeed in registering a type then also
@@ -3608,6 +3681,10 @@ static void cleanup_ipmi_si(void)
if (pnp_registered)
pnp_unregister_driver(&ipmi_pnp_driver);
#endif
+#ifdef CONFIG_PARISC
+ if (parisc_registered)
+ unregister_parisc_driver(&ipmi_parisc_driver);
+#endif
platform_driver_unregister(&ipmi_driver);
--
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