^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * bioscalls.c - the lowlevel layer of the PnPBIOS driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/linkage.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/pnp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/smp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/kmod.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/completion.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <asm/page.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <asm/desc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <asm/byteorder.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include "pnpbios.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) __visible struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) u16 offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) u16 segment;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) } pnp_bios_callpoint;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * These are some opcodes for a "static asmlinkage"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * As this code is *not* executed inside the linux kernel segment, but in a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * alias at offset 0, we need a far return that can not be compiled by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * default (please, prove me wrong! this is *really* ugly!)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * This is the only way to get the bios to return into the kernel code,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * because the bios code runs in 16 bit protected mode and therefore can only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * return to the caller if the call is within the first 64kB, and the linux
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * kernel begins at offset 3GB...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) asmlinkage __visible void pnp_bios_callfunc(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) __asm__(".text \n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) __ALIGN_STR "\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) ".globl pnp_bios_callfunc\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) "pnp_bios_callfunc:\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) " pushl %edx \n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) " pushl %ecx \n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) " pushl %ebx \n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) " pushl %eax \n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) " lcallw *pnp_bios_callpoint\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) " addl $16, %esp \n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) " lret \n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) ".previous \n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define Q2_SET_SEL(cpu, selname, address, size) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) struct desc_struct *gdt = get_cpu_gdt_rw((cpu)); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) set_desc_base(&gdt[(selname) >> 3], (u32)(address)); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) set_desc_limit(&gdt[(selname) >> 3], (size) - 1); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) } while(0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) static struct desc_struct bad_bios_desc = GDT_ENTRY_INIT(0x4092,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) (unsigned long)__va(0x400UL), PAGE_SIZE - 0x400 - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) * At some point we want to use this stack frame pointer to unwind
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) * after PnP BIOS oopses.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) __visible u32 pnp_bios_fault_esp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) __visible u32 pnp_bios_fault_eip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) __visible u32 pnp_bios_is_utter_crap = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) static spinlock_t pnp_bios_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) * Support Functions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) static inline u16 call_pnp_bios(u16 func, u16 arg1, u16 arg2, u16 arg3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) u16 arg4, u16 arg5, u16 arg6, u16 arg7,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) void *ts1_base, u32 ts1_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) void *ts2_base, u32 ts2_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) u16 status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) struct desc_struct save_desc_40;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) int cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) * PnP BIOSes are generally not terribly re-entrant.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) * Also, don't rely on them to save everything correctly.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) if (pnp_bios_is_utter_crap)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) return PNP_FUNCTION_NOT_SUPPORTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) cpu = get_cpu();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) save_desc_40 = get_cpu_gdt_rw(cpu)[0x40 / 8];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) get_cpu_gdt_rw(cpu)[0x40 / 8] = bad_bios_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) /* On some boxes IRQ's during PnP BIOS calls are deadly. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) spin_lock_irqsave(&pnp_bios_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) /* The lock prevents us bouncing CPU here */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) if (ts1_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) Q2_SET_SEL(smp_processor_id(), PNP_TS1, ts1_base, ts1_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) if (ts2_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) Q2_SET_SEL(smp_processor_id(), PNP_TS2, ts2_base, ts2_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) __asm__ __volatile__("pushl %%ebp\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) "pushl %%edi\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) "pushl %%esi\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) "pushl %%ds\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) "pushl %%es\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) "pushl %%fs\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) "pushl %%gs\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) "pushfl\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) "movl %%esp, pnp_bios_fault_esp\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) "movl $1f, pnp_bios_fault_eip\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) "lcall %5,%6\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) "1:popfl\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) "popl %%gs\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) "popl %%fs\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) "popl %%es\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) "popl %%ds\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) "popl %%esi\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) "popl %%edi\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) "popl %%ebp\n\t":"=a"(status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) :"0"((func) | (((u32) arg1) << 16)),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) "b"((arg2) | (((u32) arg3) << 16)),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) "c"((arg4) | (((u32) arg5) << 16)),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) "d"((arg6) | (((u32) arg7) << 16)),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) "i"(PNP_CS32), "i"(0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) :"memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) spin_unlock_irqrestore(&pnp_bios_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) get_cpu_gdt_rw(cpu)[0x40 / 8] = save_desc_40;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) put_cpu();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) /* If we get here and this is set then the PnP BIOS faulted on us. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) if (pnp_bios_is_utter_crap) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) printk(KERN_ERR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) "PnPBIOS: Warning! Your PnP BIOS caused a fatal error. Attempting to continue\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) printk(KERN_ERR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) "PnPBIOS: You may need to reboot with the \"pnpbios=off\" option to operate stably\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) printk(KERN_ERR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) "PnPBIOS: Check with your vendor for an updated BIOS\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) void pnpbios_print_status(const char *module, u16 status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) switch (status) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) case PNP_SUCCESS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) printk(KERN_ERR "PnPBIOS: %s: function successful\n", module);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) case PNP_NOT_SET_STATICALLY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) printk(KERN_ERR "PnPBIOS: %s: unable to set static resources\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) module);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) case PNP_UNKNOWN_FUNCTION:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) printk(KERN_ERR "PnPBIOS: %s: invalid function number passed\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) module);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) case PNP_FUNCTION_NOT_SUPPORTED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) printk(KERN_ERR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) "PnPBIOS: %s: function not supported on this system\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) module);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) case PNP_INVALID_HANDLE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) printk(KERN_ERR "PnPBIOS: %s: invalid handle\n", module);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) case PNP_BAD_PARAMETER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) printk(KERN_ERR "PnPBIOS: %s: invalid parameters were passed\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) module);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) case PNP_SET_FAILED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) printk(KERN_ERR "PnPBIOS: %s: unable to set resources\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) module);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) case PNP_EVENTS_NOT_PENDING:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) printk(KERN_ERR "PnPBIOS: %s: no events are pending\n", module);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) case PNP_SYSTEM_NOT_DOCKED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) printk(KERN_ERR "PnPBIOS: %s: the system is not docked\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) module);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) case PNP_NO_ISA_PNP_CARDS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) printk(KERN_ERR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) "PnPBIOS: %s: no isapnp cards are installed on this system\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) module);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) case PNP_UNABLE_TO_DETERMINE_DOCK_CAPABILITIES:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) printk(KERN_ERR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) "PnPBIOS: %s: cannot determine the capabilities of the docking station\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) module);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) case PNP_CONFIG_CHANGE_FAILED_NO_BATTERY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) printk(KERN_ERR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) "PnPBIOS: %s: unable to undock, the system does not have a battery\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) module);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) case PNP_CONFIG_CHANGE_FAILED_RESOURCE_CONFLICT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) printk(KERN_ERR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) "PnPBIOS: %s: could not dock due to resource conflicts\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) module);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) case PNP_BUFFER_TOO_SMALL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) printk(KERN_ERR "PnPBIOS: %s: the buffer passed is too small\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) module);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) case PNP_USE_ESCD_SUPPORT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) printk(KERN_ERR "PnPBIOS: %s: use ESCD instead\n", module);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) case PNP_MESSAGE_NOT_SUPPORTED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) printk(KERN_ERR "PnPBIOS: %s: the message is unsupported\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) module);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) case PNP_HARDWARE_ERROR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) printk(KERN_ERR "PnPBIOS: %s: a hardware failure has occurred\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) module);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) printk(KERN_ERR "PnPBIOS: %s: unexpected status 0x%x\n", module,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) * PnP BIOS Low Level Calls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) #define PNP_GET_NUM_SYS_DEV_NODES 0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) #define PNP_GET_SYS_DEV_NODE 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) #define PNP_SET_SYS_DEV_NODE 0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) #define PNP_GET_EVENT 0x03
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) #define PNP_SEND_MESSAGE 0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) #define PNP_GET_DOCKING_STATION_INFORMATION 0x05
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) #define PNP_SET_STATIC_ALLOCED_RES_INFO 0x09
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) #define PNP_GET_STATIC_ALLOCED_RES_INFO 0x0a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) #define PNP_GET_APM_ID_TABLE 0x0b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) #define PNP_GET_PNP_ISA_CONFIG_STRUC 0x40
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) #define PNP_GET_ESCD_INFO 0x41
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) #define PNP_READ_ESCD 0x42
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) #define PNP_WRITE_ESCD 0x43
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) * Call PnP BIOS with function 0x00, "get number of system device nodes"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) static int __pnp_bios_dev_node_info(struct pnp_dev_node_info *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) u16 status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) if (!pnp_bios_present())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) return PNP_FUNCTION_NOT_SUPPORTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) status = call_pnp_bios(PNP_GET_NUM_SYS_DEV_NODES, 0, PNP_TS1, 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) PNP_TS1, PNP_DS, 0, 0, data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) sizeof(struct pnp_dev_node_info), NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) data->no_nodes &= 0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) int pnp_bios_dev_node_info(struct pnp_dev_node_info *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) int status = __pnp_bios_dev_node_info(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) if (status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) pnpbios_print_status("dev_node_info", status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) * Note that some PnP BIOSes (e.g., on Sony Vaio laptops) die a horrible
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) * death if they are asked to access the "current" configuration.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) * Therefore, if it's a matter of indifference, it's better to call
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) * get_dev_node() and set_dev_node() with boot=1 rather than with boot=0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) * Call PnP BIOS with function 0x01, "get system device node"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) * Input: *nodenum = desired node,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) * boot = whether to get nonvolatile boot (!=0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) * or volatile current (0) config
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) * Output: *nodenum=next node or 0xff if no more nodes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) static int __pnp_bios_get_dev_node(u8 *nodenum, char boot,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) struct pnp_bios_node *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) u16 status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) u16 tmp_nodenum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) if (!pnp_bios_present())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) return PNP_FUNCTION_NOT_SUPPORTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) if (!boot && pnpbios_dont_use_current_config)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) return PNP_FUNCTION_NOT_SUPPORTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) tmp_nodenum = *nodenum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) status = call_pnp_bios(PNP_GET_SYS_DEV_NODE, 0, PNP_TS1, 0, PNP_TS2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) boot ? 2 : 1, PNP_DS, 0, &tmp_nodenum,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) sizeof(tmp_nodenum), data, 65536);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) *nodenum = tmp_nodenum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) int pnp_bios_get_dev_node(u8 *nodenum, char boot, struct pnp_bios_node *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) status = __pnp_bios_get_dev_node(nodenum, boot, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) if (status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) pnpbios_print_status("get_dev_node", status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) * Call PnP BIOS with function 0x02, "set system device node"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) * Input: *nodenum = desired node,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) * boot = whether to set nonvolatile boot (!=0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) * or volatile current (0) config
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) static int __pnp_bios_set_dev_node(u8 nodenum, char boot,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) struct pnp_bios_node *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) u16 status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) if (!pnp_bios_present())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) return PNP_FUNCTION_NOT_SUPPORTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) if (!boot && pnpbios_dont_use_current_config)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) return PNP_FUNCTION_NOT_SUPPORTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) status = call_pnp_bios(PNP_SET_SYS_DEV_NODE, nodenum, 0, PNP_TS1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) boot ? 2 : 1, PNP_DS, 0, 0, data, 65536, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) int pnp_bios_set_dev_node(u8 nodenum, char boot, struct pnp_bios_node *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) status = __pnp_bios_set_dev_node(nodenum, boot, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) if (status) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) pnpbios_print_status("set_dev_node", status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) if (!boot) { /* Update devlist */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) status = pnp_bios_get_dev_node(&nodenum, boot, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) if (status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) * Call PnP BIOS with function 0x05, "get docking station information"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) int pnp_bios_dock_station_info(struct pnp_docking_station_info *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) u16 status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) if (!pnp_bios_present())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) return PNP_FUNCTION_NOT_SUPPORTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) status = call_pnp_bios(PNP_GET_DOCKING_STATION_INFORMATION, 0, PNP_TS1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) PNP_DS, 0, 0, 0, 0, data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) sizeof(struct pnp_docking_station_info), NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) * Call PnP BIOS with function 0x0a, "get statically allocated resource
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) * information"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) static int __pnp_bios_get_stat_res(char *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) u16 status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) if (!pnp_bios_present())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) return PNP_FUNCTION_NOT_SUPPORTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) status = call_pnp_bios(PNP_GET_STATIC_ALLOCED_RES_INFO, 0, PNP_TS1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) PNP_DS, 0, 0, 0, 0, info, 65536, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) int pnp_bios_get_stat_res(char *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) status = __pnp_bios_get_stat_res(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) if (status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) pnpbios_print_status("get_stat_res", status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) * Call PnP BIOS with function 0x40, "get isa pnp configuration structure"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) static int __pnp_bios_isapnp_config(struct pnp_isa_config_struc *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) u16 status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) if (!pnp_bios_present())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) return PNP_FUNCTION_NOT_SUPPORTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) status = call_pnp_bios(PNP_GET_PNP_ISA_CONFIG_STRUC, 0, PNP_TS1, PNP_DS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 0, 0, 0, 0, data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) sizeof(struct pnp_isa_config_struc), NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) int pnp_bios_isapnp_config(struct pnp_isa_config_struc *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) status = __pnp_bios_isapnp_config(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) if (status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) pnpbios_print_status("isapnp_config", status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) * Call PnP BIOS with function 0x41, "get ESCD info"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) static int __pnp_bios_escd_info(struct escd_info_struc *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) u16 status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) if (!pnp_bios_present())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) return ESCD_FUNCTION_NOT_SUPPORTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) status = call_pnp_bios(PNP_GET_ESCD_INFO, 0, PNP_TS1, 2, PNP_TS1, 4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) PNP_TS1, PNP_DS, data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) sizeof(struct escd_info_struc), NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) int pnp_bios_escd_info(struct escd_info_struc *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) status = __pnp_bios_escd_info(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) if (status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) pnpbios_print_status("escd_info", status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) * Call PnP BIOS function 0x42, "read ESCD"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) * nvram_base is determined by calling escd_info
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) static int __pnp_bios_read_escd(char *data, u32 nvram_base)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) u16 status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) if (!pnp_bios_present())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) return ESCD_FUNCTION_NOT_SUPPORTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) status = call_pnp_bios(PNP_READ_ESCD, 0, PNP_TS1, PNP_TS2, PNP_DS, 0, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) 0, data, 65536, __va(nvram_base), 65536);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) int pnp_bios_read_escd(char *data, u32 nvram_base)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) status = __pnp_bios_read_escd(data, nvram_base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) if (status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) pnpbios_print_status("read_escd", status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) void pnpbios_calls_init(union pnp_bios_install_struct *header)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) spin_lock_init(&pnp_bios_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) pnp_bios_callpoint.offset = header->fields.pm16offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) pnp_bios_callpoint.segment = PNP_CS16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) for_each_possible_cpu(i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) struct desc_struct *gdt = get_cpu_gdt_rw(i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) if (!gdt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) set_desc_base(&gdt[GDT_ENTRY_PNPBIOS_CS32],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) (unsigned long)&pnp_bios_callfunc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) set_desc_base(&gdt[GDT_ENTRY_PNPBIOS_CS16],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) (unsigned long)__va(header->fields.pm16cseg));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) set_desc_base(&gdt[GDT_ENTRY_PNPBIOS_DS],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) (unsigned long)__va(header->fields.pm16dseg));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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