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path: root/drivers/pnp/pnpbios/bioscalls.c
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Diffstat (limited to 'drivers/pnp/pnpbios/bioscalls.c')
-rw-r--r--drivers/pnp/pnpbios/bioscalls.c339
1 files changed, 148 insertions, 191 deletions
diff --git a/drivers/pnp/pnpbios/bioscalls.c b/drivers/pnp/pnpbios/bioscalls.c
index a1f0b0ba2bf..5dba68fe33f 100644
--- a/drivers/pnp/pnpbios/bioscalls.c
+++ b/drivers/pnp/pnpbios/bioscalls.c
@@ -1,6 +1,5 @@
/*
* bioscalls.c - the lowlevel layer of the PnPBIOS driver
- *
*/
#include <linux/types.h>
@@ -26,11 +25,10 @@
#include "pnpbios.h"
static struct {
- u16 offset;
- u16 segment;
+ u16 offset;
+ u16 segment;
} pnp_bios_callpoint;
-
/*
* These are some opcodes for a "static asmlinkage"
* As this code is *not* executed inside the linux kernel segment, but in a
@@ -44,8 +42,7 @@ static struct {
asmlinkage void pnp_bios_callfunc(void);
-__asm__(
- ".text \n"
+__asm__(".text \n"
__ALIGN_STR "\n"
"pnp_bios_callfunc:\n"
" pushl %edx \n"
@@ -55,8 +52,7 @@ __asm__(
" lcallw *pnp_bios_callpoint\n"
" addl $16, %esp \n"
" lret \n"
- ".previous \n"
-);
+ ".previous \n");
#define Q2_SET_SEL(cpu, selname, address, size) \
do { \
@@ -78,7 +74,6 @@ u32 pnp_bios_is_utter_crap = 0;
static spinlock_t pnp_bios_lock;
-
/*
* Support Functions
*/
@@ -97,7 +92,7 @@ static inline u16 call_pnp_bios(u16 func, u16 arg1, u16 arg2, u16 arg3,
* PnP BIOSes are generally not terribly re-entrant.
* Also, don't rely on them to save everything correctly.
*/
- if(pnp_bios_is_utter_crap)
+ if (pnp_bios_is_utter_crap)
return PNP_FUNCTION_NOT_SUPPORTED;
cpu = get_cpu();
@@ -113,112 +108,128 @@ static inline u16 call_pnp_bios(u16 func, u16 arg1, u16 arg2, u16 arg3,
if (ts2_size)
Q2_SET_SEL(smp_processor_id(), PNP_TS2, ts2_base, ts2_size);
- __asm__ __volatile__(
- "pushl %%ebp\n\t"
- "pushl %%edi\n\t"
- "pushl %%esi\n\t"
- "pushl %%ds\n\t"
- "pushl %%es\n\t"
- "pushl %%fs\n\t"
- "pushl %%gs\n\t"
- "pushfl\n\t"
- "movl %%esp, pnp_bios_fault_esp\n\t"
- "movl $1f, pnp_bios_fault_eip\n\t"
- "lcall %5,%6\n\t"
- "1:popfl\n\t"
- "popl %%gs\n\t"
- "popl %%fs\n\t"
- "popl %%es\n\t"
- "popl %%ds\n\t"
- "popl %%esi\n\t"
- "popl %%edi\n\t"
- "popl %%ebp\n\t"
- : "=a" (status)
- : "0" ((func) | (((u32)arg1) << 16)),
- "b" ((arg2) | (((u32)arg3) << 16)),
- "c" ((arg4) | (((u32)arg5) << 16)),
- "d" ((arg6) | (((u32)arg7) << 16)),
- "i" (PNP_CS32),
- "i" (0)
- : "memory"
- );
+ __asm__ __volatile__("pushl %%ebp\n\t"
+ "pushl %%edi\n\t"
+ "pushl %%esi\n\t"
+ "pushl %%ds\n\t"
+ "pushl %%es\n\t"
+ "pushl %%fs\n\t"
+ "pushl %%gs\n\t"
+ "pushfl\n\t"
+ "movl %%esp, pnp_bios_fault_esp\n\t"
+ "movl $1f, pnp_bios_fault_eip\n\t"
+ "lcall %5,%6\n\t"
+ "1:popfl\n\t"
+ "popl %%gs\n\t"
+ "popl %%fs\n\t"
+ "popl %%es\n\t"
+ "popl %%ds\n\t"
+ "popl %%esi\n\t"
+ "popl %%edi\n\t"
+ "popl %%ebp\n\t":"=a"(status)
+ :"0"((func) | (((u32) arg1) << 16)),
+ "b"((arg2) | (((u32) arg3) << 16)),
+ "c"((arg4) | (((u32) arg5) << 16)),
+ "d"((arg6) | (((u32) arg7) << 16)),
+ "i"(PNP_CS32), "i"(0)
+ :"memory");
spin_unlock_irqrestore(&pnp_bios_lock, flags);
get_cpu_gdt_table(cpu)[0x40 / 8] = save_desc_40;
put_cpu();
/* If we get here and this is set then the PnP BIOS faulted on us. */
- if(pnp_bios_is_utter_crap)
- {
- printk(KERN_ERR "PnPBIOS: Warning! Your PnP BIOS caused a fatal error. Attempting to continue\n");
- printk(KERN_ERR "PnPBIOS: You may need to reboot with the \"pnpbios=off\" option to operate stably\n");
- printk(KERN_ERR "PnPBIOS: Check with your vendor for an updated BIOS\n");
+ if (pnp_bios_is_utter_crap) {
+ printk(KERN_ERR
+ "PnPBIOS: Warning! Your PnP BIOS caused a fatal error. Attempting to continue\n");
+ printk(KERN_ERR
+ "PnPBIOS: You may need to reboot with the \"pnpbios=off\" option to operate stably\n");
+ printk(KERN_ERR
+ "PnPBIOS: Check with your vendor for an updated BIOS\n");
}
return status;
}
-void pnpbios_print_status(const char * module, u16 status)
+void pnpbios_print_status(const char *module, u16 status)
{
- switch(status) {
+ switch (status) {
case PNP_SUCCESS:
printk(KERN_ERR "PnPBIOS: %s: function successful\n", module);
break;
case PNP_NOT_SET_STATICALLY:
- printk(KERN_ERR "PnPBIOS: %s: unable to set static resources\n", module);
+ printk(KERN_ERR "PnPBIOS: %s: unable to set static resources\n",
+ module);
break;
case PNP_UNKNOWN_FUNCTION:
- printk(KERN_ERR "PnPBIOS: %s: invalid function number passed\n", module);
+ printk(KERN_ERR "PnPBIOS: %s: invalid function number passed\n",
+ module);
break;
case PNP_FUNCTION_NOT_SUPPORTED:
- printk(KERN_ERR "PnPBIOS: %s: function not supported on this system\n", module);
+ printk(KERN_ERR
+ "PnPBIOS: %s: function not supported on this system\n",
+ module);
break;
case PNP_INVALID_HANDLE:
printk(KERN_ERR "PnPBIOS: %s: invalid handle\n", module);
break;
case PNP_BAD_PARAMETER:
- printk(KERN_ERR "PnPBIOS: %s: invalid parameters were passed\n", module);
+ printk(KERN_ERR "PnPBIOS: %s: invalid parameters were passed\n",
+ module);
break;
case PNP_SET_FAILED:
- printk(KERN_ERR "PnPBIOS: %s: unable to set resources\n", module);
+ printk(KERN_ERR "PnPBIOS: %s: unable to set resources\n",
+ module);
break;
case PNP_EVENTS_NOT_PENDING:
printk(KERN_ERR "PnPBIOS: %s: no events are pending\n", module);
break;
case PNP_SYSTEM_NOT_DOCKED:
- printk(KERN_ERR "PnPBIOS: %s: the system is not docked\n", module);
+ printk(KERN_ERR "PnPBIOS: %s: the system is not docked\n",
+ module);
break;
case PNP_NO_ISA_PNP_CARDS:
- printk(KERN_ERR "PnPBIOS: %s: no isapnp cards are installed on this system\n", module);
+ printk(KERN_ERR
+ "PnPBIOS: %s: no isapnp cards are installed on this system\n",
+ module);
break;
case PNP_UNABLE_TO_DETERMINE_DOCK_CAPABILITIES:
- printk(KERN_ERR "PnPBIOS: %s: cannot determine the capabilities of the docking station\n", module);
+ printk(KERN_ERR
+ "PnPBIOS: %s: cannot determine the capabilities of the docking station\n",
+ module);
break;
case PNP_CONFIG_CHANGE_FAILED_NO_BATTERY:
- printk(KERN_ERR "PnPBIOS: %s: unable to undock, the system does not have a battery\n", module);
+ printk(KERN_ERR
+ "PnPBIOS: %s: unable to undock, the system does not have a battery\n",
+ module);
break;
case PNP_CONFIG_CHANGE_FAILED_RESOURCE_CONFLICT:
- printk(KERN_ERR "PnPBIOS: %s: could not dock due to resource conflicts\n", module);
+ printk(KERN_ERR
+ "PnPBIOS: %s: could not dock due to resource conflicts\n",
+ module);
break;
case PNP_BUFFER_TOO_SMALL:
- printk(KERN_ERR "PnPBIOS: %s: the buffer passed is too small\n", module);
+ printk(KERN_ERR "PnPBIOS: %s: the buffer passed is too small\n",
+ module);
break;
case PNP_USE_ESCD_SUPPORT:
printk(KERN_ERR "PnPBIOS: %s: use ESCD instead\n", module);
break;
case PNP_MESSAGE_NOT_SUPPORTED:
- printk(KERN_ERR "PnPBIOS: %s: the message is unsupported\n", module);
+ printk(KERN_ERR "PnPBIOS: %s: the message is unsupported\n",
+ module);
break;
case PNP_HARDWARE_ERROR:
- printk(KERN_ERR "PnPBIOS: %s: a hardware failure has occured\n", module);
+ printk(KERN_ERR "PnPBIOS: %s: a hardware failure has occured\n",
+ module);
break;
default:
- printk(KERN_ERR "PnPBIOS: %s: unexpected status 0x%x\n", module, status);
+ printk(KERN_ERR "PnPBIOS: %s: unexpected status 0x%x\n", module,
+ status);
break;
}
}
-
/*
* PnP BIOS Low Level Calls
*/
@@ -243,19 +254,22 @@ void pnpbios_print_status(const char * module, u16 status)
static int __pnp_bios_dev_node_info(struct pnp_dev_node_info *data)
{
u16 status;
+
if (!pnp_bios_present())
return PNP_FUNCTION_NOT_SUPPORTED;
- status = call_pnp_bios(PNP_GET_NUM_SYS_DEV_NODES, 0, PNP_TS1, 2, PNP_TS1, PNP_DS, 0, 0,
- data, sizeof(struct pnp_dev_node_info), NULL, 0);
+ status = call_pnp_bios(PNP_GET_NUM_SYS_DEV_NODES, 0, PNP_TS1, 2,
+ PNP_TS1, PNP_DS, 0, 0, data,
+ sizeof(struct pnp_dev_node_info), NULL, 0);
data->no_nodes &= 0xff;
return status;
}
int pnp_bios_dev_node_info(struct pnp_dev_node_info *data)
{
- int status = __pnp_bios_dev_node_info( data );
- if ( status )
- pnpbios_print_status( "dev_node_info", status );
+ int status = __pnp_bios_dev_node_info(data);
+
+ if (status)
+ pnpbios_print_status("dev_node_info", status);
return status;
}
@@ -273,17 +287,20 @@ int pnp_bios_dev_node_info(struct pnp_dev_node_info *data)
* or volatile current (0) config
* Output: *nodenum=next node or 0xff if no more nodes
*/
-static int __pnp_bios_get_dev_node(u8 *nodenum, char boot, struct pnp_bios_node *data)
+static int __pnp_bios_get_dev_node(u8 *nodenum, char boot,
+ struct pnp_bios_node *data)
{
u16 status;
u16 tmp_nodenum;
+
if (!pnp_bios_present())
return PNP_FUNCTION_NOT_SUPPORTED;
- if ( !boot && pnpbios_dont_use_current_config )
+ if (!boot && pnpbios_dont_use_current_config)
return PNP_FUNCTION_NOT_SUPPORTED;
tmp_nodenum = *nodenum;
- status = call_pnp_bios(PNP_GET_SYS_DEV_NODE, 0, PNP_TS1, 0, PNP_TS2, boot ? 2 : 1, PNP_DS, 0,
- &tmp_nodenum, sizeof(tmp_nodenum), data, 65536);
+ status = call_pnp_bios(PNP_GET_SYS_DEV_NODE, 0, PNP_TS1, 0, PNP_TS2,
+ boot ? 2 : 1, PNP_DS, 0, &tmp_nodenum,
+ sizeof(tmp_nodenum), data, 65536);
*nodenum = tmp_nodenum;
return status;
}
@@ -291,104 +308,66 @@ static int __pnp_bios_get_dev_node(u8 *nodenum, char boot, struct pnp_bios_node
int pnp_bios_get_dev_node(u8 *nodenum, char boot, struct pnp_bios_node *data)
{
int status;
- status = __pnp_bios_get_dev_node( nodenum, boot, data );
- if ( status )
- pnpbios_print_status( "get_dev_node", status );
+
+ status = __pnp_bios_get_dev_node(nodenum, boot, data);
+ if (status)
+ pnpbios_print_status("get_dev_node", status);
return status;
}
-
/*
* Call PnP BIOS with function 0x02, "set system device node"
* Input: *nodenum = desired node,
* boot = whether to set nonvolatile boot (!=0)
* or volatile current (0) config
*/
-static int __pnp_bios_set_dev_node(u8 nodenum, char boot, struct pnp_bios_node *data)
+static int __pnp_bios_set_dev_node(u8 nodenum, char boot,
+ struct pnp_bios_node *data)
{
u16 status;
+
if (!pnp_bios_present())
return PNP_FUNCTION_NOT_SUPPORTED;
- if ( !boot && pnpbios_dont_use_current_config )
+ if (!boot && pnpbios_dont_use_current_config)
return PNP_FUNCTION_NOT_SUPPORTED;
- status = call_pnp_bios(PNP_SET_SYS_DEV_NODE, nodenum, 0, PNP_TS1, boot ? 2 : 1, PNP_DS, 0, 0,
- data, 65536, NULL, 0);
+ status = call_pnp_bios(PNP_SET_SYS_DEV_NODE, nodenum, 0, PNP_TS1,
+ boot ? 2 : 1, PNP_DS, 0, 0, data, 65536, NULL,
+ 0);
return status;
}
int pnp_bios_set_dev_node(u8 nodenum, char boot, struct pnp_bios_node *data)
{
int status;
- status = __pnp_bios_set_dev_node( nodenum, boot, data );
- if ( status ) {
- pnpbios_print_status( "set_dev_node", status );
+
+ status = __pnp_bios_set_dev_node(nodenum, boot, data);
+ if (status) {
+ pnpbios_print_status("set_dev_node", status);
return status;
}
- if ( !boot ) { /* Update devlist */
- status = pnp_bios_get_dev_node( &nodenum, boot, data );
- if ( status )
+ if (!boot) { /* Update devlist */
+ status = pnp_bios_get_dev_node(&nodenum, boot, data);
+ if (status)
return status;
}
return status;
}
-#if needed
-/*
- * Call PnP BIOS with function 0x03, "get event"
- */
-static int pnp_bios_get_event(u16 *event)
-{
- u16 status;
- if (!pnp_bios_present())
- return PNP_FUNCTION_NOT_SUPPORTED;
- status = call_pnp_bios(PNP_GET_EVENT, 0, PNP_TS1, PNP_DS, 0, 0 ,0 ,0,
- event, sizeof(u16), NULL, 0);
- return status;
-}
-#endif
-
-#if needed
-/*
- * Call PnP BIOS with function 0x04, "send message"
- */
-static int pnp_bios_send_message(u16 message)
-{
- u16 status;
- if (!pnp_bios_present())
- return PNP_FUNCTION_NOT_SUPPORTED;
- status = call_pnp_bios(PNP_SEND_MESSAGE, message, PNP_DS, 0, 0, 0, 0, 0, 0, 0, 0, 0);
- return status;
-}
-#endif
-
/*
* Call PnP BIOS with function 0x05, "get docking station information"
*/
int pnp_bios_dock_station_info(struct pnp_docking_station_info *data)
{
u16 status;
- if (!pnp_bios_present())
- return PNP_FUNCTION_NOT_SUPPORTED;
- status = call_pnp_bios(PNP_GET_DOCKING_STATION_INFORMATION, 0, PNP_TS1, PNP_DS, 0, 0, 0, 0,
- data, sizeof(struct pnp_docking_station_info), NULL, 0);
- return status;
-}
-#if needed
-/*
- * Call PnP BIOS with function 0x09, "set statically allocated resource
- * information"
- */
-static int pnp_bios_set_stat_res(char *info)
-{
- u16 status;
if (!pnp_bios_present())
return PNP_FUNCTION_NOT_SUPPORTED;
- status = call_pnp_bios(PNP_SET_STATIC_ALLOCED_RES_INFO, 0, PNP_TS1, PNP_DS, 0, 0, 0, 0,
- info, *((u16 *) info), 0, 0);
+ status = call_pnp_bios(PNP_GET_DOCKING_STATION_INFORMATION, 0, PNP_TS1,
+ PNP_DS, 0, 0, 0, 0, data,
+ sizeof(struct pnp_docking_station_info), NULL,
+ 0);
return status;
}
-#endif
/*
* Call PnP BIOS with function 0x0a, "get statically allocated resource
@@ -397,36 +376,23 @@ static int pnp_bios_set_stat_res(char *info)
static int __pnp_bios_get_stat_res(char *info)
{
u16 status;
+
if (!pnp_bios_present())
return PNP_FUNCTION_NOT_SUPPORTED;
- status = call_pnp_bios(PNP_GET_STATIC_ALLOCED_RES_INFO, 0, PNP_TS1, PNP_DS, 0, 0, 0, 0,
- info, 65536, NULL, 0);
+ status = call_pnp_bios(PNP_GET_STATIC_ALLOCED_RES_INFO, 0, PNP_TS1,
+ PNP_DS, 0, 0, 0, 0, info, 65536, NULL, 0);
return status;
}
int pnp_bios_get_stat_res(char *info)
{
int status;
- status = __pnp_bios_get_stat_res( info );
- if ( status )
- pnpbios_print_status( "get_stat_res", status );
- return status;
-}
-#if needed
-/*
- * Call PnP BIOS with function 0x0b, "get APM id table"
- */
-static int pnp_bios_apm_id_table(char *table, u16 *size)
-{
- u16 status;
- if (!pnp_bios_present())
- return PNP_FUNCTION_NOT_SUPPORTED;
- status = call_pnp_bios(PNP_GET_APM_ID_TABLE, 0, PNP_TS2, 0, PNP_TS1, PNP_DS, 0, 0,
- table, *size, size, sizeof(u16));
+ status = __pnp_bios_get_stat_res(info);
+ if (status)
+ pnpbios_print_status("get_stat_res", status);
return status;
}
-#endif
/*
* Call PnP BIOS with function 0x40, "get isa pnp configuration structure"
@@ -434,19 +400,22 @@ static int pnp_bios_apm_id_table(char *table, u16 *size)
static int __pnp_bios_isapnp_config(struct pnp_isa_config_struc *data)
{
u16 status;
+
if (!pnp_bios_present())
return PNP_FUNCTION_NOT_SUPPORTED;
- status = call_pnp_bios(PNP_GET_PNP_ISA_CONFIG_STRUC, 0, PNP_TS1, PNP_DS, 0, 0, 0, 0,
- data, sizeof(struct pnp_isa_config_struc), NULL, 0);
+ status = call_pnp_bios(PNP_GET_PNP_ISA_CONFIG_STRUC, 0, PNP_TS1, PNP_DS,
+ 0, 0, 0, 0, data,
+ sizeof(struct pnp_isa_config_struc), NULL, 0);
return status;
}
int pnp_bios_isapnp_config(struct pnp_isa_config_struc *data)
{
int status;
- status = __pnp_bios_isapnp_config( data );
- if ( status )
- pnpbios_print_status( "isapnp_config", status );
+
+ status = __pnp_bios_isapnp_config(data);
+ if (status)
+ pnpbios_print_status("isapnp_config", status);
return status;
}
@@ -456,19 +425,22 @@ int pnp_bios_isapnp_config(struct pnp_isa_config_struc *data)
static int __pnp_bios_escd_info(struct escd_info_struc *data)
{
u16 status;
+
if (!pnp_bios_present())
return ESCD_FUNCTION_NOT_SUPPORTED;
- status = call_pnp_bios(PNP_GET_ESCD_INFO, 0, PNP_TS1, 2, PNP_TS1, 4, PNP_TS1, PNP_DS,
- data, sizeof(struct escd_info_struc), NULL, 0);
+ status = call_pnp_bios(PNP_GET_ESCD_INFO, 0, PNP_TS1, 2, PNP_TS1, 4,
+ PNP_TS1, PNP_DS, data,
+ sizeof(struct escd_info_struc), NULL, 0);
return status;
}
int pnp_bios_escd_info(struct escd_info_struc *data)
{
int status;
- status = __pnp_bios_escd_info( data );
- if ( status )
- pnpbios_print_status( "escd_info", status );
+
+ status = __pnp_bios_escd_info(data);
+ if (status)
+ pnpbios_print_status("escd_info", status);
return status;
}
@@ -479,57 +451,42 @@ int pnp_bios_escd_info(struct escd_info_struc *data)
static int __pnp_bios_read_escd(char *data, u32 nvram_base)
{
u16 status;
+
if (!pnp_bios_present())
return ESCD_FUNCTION_NOT_SUPPORTED;
- status = call_pnp_bios(PNP_READ_ESCD, 0, PNP_TS1, PNP_TS2, PNP_DS, 0, 0, 0,
- data, 65536, __va(nvram_base), 65536);
+ status = call_pnp_bios(PNP_READ_ESCD, 0, PNP_TS1, PNP_TS2, PNP_DS, 0, 0,
+ 0, data, 65536, __va(nvram_base), 65536);
return status;
}
int pnp_bios_read_escd(char *data, u32 nvram_base)
{
int status;
- status = __pnp_bios_read_escd( data, nvram_base );
- if ( status )
- pnpbios_print_status( "read_escd", status );
- return status;
-}
-#if needed
-/*
- * Call PnP BIOS function 0x43, "write ESCD"
- */
-static int pnp_bios_write_escd(char *data, u32 nvram_base)
-{
- u16 status;
- if (!pnp_bios_present())
- return ESCD_FUNCTION_NOT_SUPPORTED;
- status = call_pnp_bios(PNP_WRITE_ESCD, 0, PNP_TS1, PNP_TS2, PNP_DS, 0, 0, 0,
- data, 65536, __va(nvram_base), 65536);
+ status = __pnp_bios_read_escd(data, nvram_base);
+ if (status)
+ pnpbios_print_status("read_escd", status);
return status;
}
-#endif
-
-
-/*
- * Initialization
- */
void pnpbios_calls_init(union pnp_bios_install_struct *header)
{
int i;
+
spin_lock_init(&pnp_bios_lock);
pnp_bios_callpoint.offset = header->fields.pm16offset;
pnp_bios_callpoint.segment = PNP_CS16;
set_base(bad_bios_desc, __va((unsigned long)0x40 << 4));
_set_limit((char *)&bad_bios_desc, 4095 - (0x40 << 4));
- for (i = 0; i < NR_CPUS; i++) {
- struct desc_struct *gdt = get_cpu_gdt_table(i);
- if (!gdt)
- continue;
- set_base(gdt[GDT_ENTRY_PNPBIOS_CS32], &pnp_bios_callfunc);
- set_base(gdt[GDT_ENTRY_PNPBIOS_CS16], __va(header->fields.pm16cseg));
- set_base(gdt[GDT_ENTRY_PNPBIOS_DS], __va(header->fields.pm16dseg));
- }
+ for (i = 0; i < NR_CPUS; i++) {
+ struct desc_struct *gdt = get_cpu_gdt_table(i);
+ if (!gdt)
+ continue;
+ set_base(gdt[GDT_ENTRY_PNPBIOS_CS32], &pnp_bios_callfunc);
+ set_base(gdt[GDT_ENTRY_PNPBIOS_CS16],
+ __va(header->fields.pm16cseg));
+ set_base(gdt[GDT_ENTRY_PNPBIOS_DS],
+ __va(header->fields.pm16dseg));
+ }
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-23 01:31:26 +0000