#define DRVNAME "it87"
-/* Necessary API not (yet) exported in upstream kernel */
-/* #define __IT87_USE_ACPI_MUTEX */
-
enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728, it8732,
it8771, it8772, it8781, it8782, it8783, it8786, it8790,
it8792, it8603, it8607, it8613, it8620, it8622, it8625, it8628,
module_param(force_id, ushort, 0);
MODULE_PARM_DESC(force_id, "Override the detected device ID");
-static unsigned short blacklist = 1;
-module_param(blacklist, ushort, 0);
-MODULE_PARM_DESC(blacklist,
- "Enable/disable blacklist (1=enable, 0=disable, default 1)");
-
static struct platform_device *it87_pdev[2];
-static bool it87_sio4e_broken;
-#ifdef __IT87_USE_ACPI_MUTEX
-static acpi_handle it87_acpi_sio_handle;
-static char *it87_acpi_sio_mutex;
-#endif
#define REG_2E 0x2e /* The register to read/write */
#define REG_4E 0x4e /* Secondary register to read/write */
outb(reg, ioreg);
val = inb(ioreg + 1);
- if (it87_sio4e_broken && ioreg == 0x4e && val == 0xff) {
- __superio_enter(ioreg);
- outb(reg, ioreg);
- val = inb(ioreg + 1);
- pr_warn("Retry access 0x4e:0x%x -> 0x%x\n", reg, val);
- }
return val;
}
static inline int superio_enter(int ioreg)
{
-#ifdef __IT87_USE_ACPI_MUTEX
- if (it87_acpi_sio_mutex) {
- acpi_status status;
-
- status = acpi_acquire_mutex(NULL, it87_acpi_sio_mutex, 0x10);
- if (ACPI_FAILURE(status)) {
- pr_err("Failed to acquire ACPI mutex\n");
- return -EBUSY;
- }
- }
-#endif
/*
* Try to reserve ioreg and ioreg + 1 for exclusive access.
*/
return 0;
error:
-#ifdef __IT87_USE_ACPI_MUTEX
- if (it87_acpi_sio_mutex)
- acpi_release_mutex(it87_acpi_sio_handle, NULL);
-#endif
return -EBUSY;
}
-static inline void superio_exit(int ioreg)
+static inline void superio_exit(int ioreg, bool doexit)
{
- if (!it87_sio4e_broken || ioreg != 0x4e) {
+ if (doexit) {
outb(0x02, ioreg);
outb(0x02, ioreg + 1);
}
release_region(ioreg, 2);
-#ifdef __IT87_USE_ACPI_MUTEX
- if (it87_acpi_sio_mutex)
- acpi_release_mutex(it87_acpi_sio_handle, NULL);
-#endif
}
/* Logical device 4 registers */
.name = "it8655",
.suffix = "E",
.features = FEAT_NEWER_AUTOPWM | FEAT_16BIT_FANS
- | FEAT_AVCC3 | FEAT_NEW_TEMPMAP
+ | FEAT_AVCC3 | FEAT_NEW_TEMPMAP | FEAT_SCALING
| FEAT_10_9MV_ADC | FEAT_IN7_INTERNAL | FEAT_BANK_SEL,
.num_temp_limit = 6,
.num_temp_offset = 6,
.name = "it8665",
.suffix = "E",
.features = FEAT_NEWER_AUTOPWM | FEAT_16BIT_FANS
- | FEAT_AVCC3 | FEAT_NEW_TEMPMAP
+ | FEAT_AVCC3 | FEAT_NEW_TEMPMAP | FEAT_SCALING
| FEAT_10_9MV_ADC | FEAT_IN7_INTERNAL | FEAT_SIX_FANS
| FEAT_SIX_PWM | FEAT_BANK_SEL,
.num_temp_limit = 6,
static int __init it87_find(int sioaddr, unsigned short *address,
struct it87_sio_data *sio_data)
{
- int err;
- u16 chip_type;
const struct it87_devices *config;
+ bool doexit = true;
+ u16 chip_type;
+ int err;
err = superio_enter(sioaddr);
if (err)
break;
case IT8792E_DEVID:
sio_data->type = it8792;
+ /*
+ * Disabling configuration mode on IT8792E can result in system
+ * hang-ups and access failures to the Super-IO chip at the
+ * second SIO address. Never exit configuration mode on this
+ * chip to avoid the problem.
+ */
+ doexit = false;
break;
case IT8771E_DEVID:
sio_data->type = it8771;
break;
case IT8790E_DEVID:
sio_data->type = it8790;
+ doexit = false; /* See IT8792E comment above */
break;
case IT8603E_DEVID:
case IT8623E_DEVID:
pr_info("Beeping is supported\n");
exit:
- superio_exit(sioaddr);
+ superio_exit(sioaddr, doexit);
return err;
}
}
struct it87_dmi_data {
- bool sio4e_broken; /* SIO accesses @ 0x4e are broken */
- char *sio_mutex; /* SIO ACPI mutex */
+ bool sio2_force_config; /* force sio2 into configuration mode */
u8 skip_pwm; /* pwm channels to skip for this board */
};
/*
- * On Gigabyte AB350 and AX370 boards, accesses to the Super-IO chip
- * at address 0x4e/0x4f can result in a system hang.
- * Accesses to address 0x2e/0x2f need to be mutex protected.
+ * On various Gigabyte AM4 boards (AB350, AX370), the second Super-IO chip
+ * (IT8792E) needs to be in configuration mode before accessing the first
+ * due to a bug in IT8792E which otherwise results in LPC bus access errors.
+ * This needs to be done before accessing the first Super-IO chip since
+ * the second chip may have been accessed prior to loading this driver.
+ *
+ * The problem is also reported to affect IT8795E, which is used on X299 boards
+ * and has the same chip ID as IT9792E (0x8733). It also appears to affect
+ * systems with IT8790E, which is used on some Z97X-Gaming boards as well as
+ * Z87X-OC.
+ * DMI entries for those systems will be added as they become available and
+ * as the problem is confirmed to affect those boards.
*/
-static struct it87_dmi_data gigabyte_ab350_gaming = {
- .sio4e_broken = true,
- .sio_mutex = "\\_SB.PCI0.SBRG.SIO1.MUT0",
+static struct it87_dmi_data gigabyte_sio2_force = {
+ .sio2_force_config = true,
};
/*
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Gigabyte Technology Co., Ltd."),
- DMI_MATCH(DMI_BOARD_NAME, "AB350-Gaming-CF"),
+ DMI_MATCH(DMI_BOARD_NAME, "AB350"),
},
- .driver_data = &gigabyte_ab350_gaming,
+ .driver_data = &gigabyte_sio2_force,
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Gigabyte Technology Co., Ltd."),
- DMI_MATCH(DMI_BOARD_NAME, "AB350-Gaming 3-CF"),
+ DMI_MATCH(DMI_BOARD_NAME, "AX370"),
},
- .driver_data = &gigabyte_ab350_gaming,
+ .driver_data = &gigabyte_sio2_force,
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Gigabyte Technology Co., Ltd."),
- DMI_MATCH(DMI_BOARD_NAME, "AB350M-D3H-CF"),
+ DMI_MATCH(DMI_BOARD_NAME, "Z97X-Gaming G1"),
},
- .driver_data = &gigabyte_ab350_gaming,
- },
- {
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Gigabyte Technology Co., Ltd."),
- DMI_MATCH(DMI_BOARD_NAME, "AX370-Gaming K7"),
- },
- .driver_data = &gigabyte_ab350_gaming,
- },
- {
- .matches = {
- DMI_MATCH(DMI_SYS_VENDOR, "Gigabyte Technology Co., Ltd."),
- DMI_MATCH(DMI_BOARD_NAME, "AX370-Gaming 5"),
- },
- .driver_data = &gigabyte_ab350_gaming,
+ .driver_data = &gigabyte_sio2_force,
},
{
.matches = {
if (dmi)
dmi_data = dmi->driver_data;
- if (dmi_data) {
- it87_sio4e_broken = dmi_data->sio4e_broken;
-#ifdef __IT87_USE_ACPI_MUTEX
- if (dmi_data->sio_mutex) {
- static acpi_status status;
-
- status = acpi_get_handle(NULL, dmi_data->sio_mutex,
- &it87_acpi_sio_handle);
- if (ACPI_SUCCESS(status)) {
- it87_acpi_sio_mutex = dmi_data->sio_mutex;
- pr_debug("Found ACPI SIO mutex %s\n",
- dmi_data->sio_mutex);
- } else {
- pr_warn("ACPI SIO mutex %s not found\n",
- dmi_data->sio_mutex);
- }
- }
-#endif /* __IT87_USE_ACPI_MUTEX */
- }
-
err = platform_driver_register(&it87_driver);
if (err)
return err;
+ if (dmi_data && dmi_data->sio2_force_config)
+ __superio_enter(REG_4E);
+
for (i = 0; i < ARRAY_SIZE(sioaddr); i++) {
- /*
- * Accessing the second Super-IO chip can result in board
- * hangs. Disable until we figure out what is going on.
- */
- if (blacklist && it87_sio4e_broken && sioaddr[i] == 0x4e)
- continue;
memset(&sio_data, 0, sizeof(struct it87_sio_data));
isa_address = 0;
err = it87_find(sioaddr[i], &isa_address, &sio_data);
projects / groeck-it87 / blobdiff