// SPDX-License-Identifier: GPL-2.0+
#define pr_fmt(fmt) "ipmi_hardcode: " fmt
#include <linux/moduleparam.h>
#include "ipmi_si.h"
/*
* There can be 4 IO ports passed in (with or without IRQs), 4 addresses,
* a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS.
*/
#define SI_MAX_PARMS 4
static char *si_type[SI_MAX_PARMS];
#define MAX_SI_TYPE_STR 30
static char si_type_str[MAX_SI_TYPE_STR];
static unsigned long addrs[SI_MAX_PARMS];
static unsigned int num_addrs;
static unsigned int ports[SI_MAX_PARMS];
static unsigned int num_ports;
static int irqs[SI_MAX_PARMS];
static unsigned int num_irqs;
static int regspacings[SI_MAX_PARMS];
static unsigned int num_regspacings;
static int regsizes[SI_MAX_PARMS];
static unsigned int num_regsizes;
static int regshifts[SI_MAX_PARMS];
static unsigned int num_regshifts;
static int slave_addrs[SI_MAX_PARMS]; /* Leaving 0 chooses the default value */
static unsigned int num_slave_addrs;
module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0);
MODULE_PARM_DESC(type, "Defines the type of each interface, each"
" interface separated by commas. The types are 'kcs',"
" 'smic', and 'bt'. For example si_type=kcs,bt will set"
" the first interface to kcs and the second to bt");
module_param_hw_array(addrs, ulong, iomem, &num_addrs, 0);
MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the"
" addresses separated by commas. Only use if an interface"
" is in memory. Otherwise, set it to zero or leave"
" it blank.");
module_param_hw_array(ports, uint, ioport, &num_ports, 0);
MODULE_PARM_DESC(ports, "Sets the port address of each interface, the"
" addresses separated by commas. Only use if an interface"
" is a port. Otherwise, set it to zero or leave"
" it blank.");
module_param_hw_array(irqs, int, irq, &num_irqs, 0);
MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the"
" addresses separated by commas. Only use if an interface"
" has an interrupt. Otherwise, set it to zero or leave"
" it blank.");
module_param_hw_array(regspacings, int, other, &num_regspacings, 0);
MODULE_PARM_DESC(regspacings, "The number of bytes between the start address"
" and each successive register used by the interface. For"
" instance, if the start address is 0xca2 and the spacing"
" is 2, then the second address is at 0xca4. Defaults"
" to 1.");
module_param_hw_array(regsizes, int, other, &num_regsizes, 0);
MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes."
" This should generally be 1, 2, 4, or 8 for an 8-bit,"
" 16-bit, 32-bit, or 64-bit register. Use this if you"
" the 8-bit IPMI register has to be read from a larger"
" register.");
module_param_hw_array(regshifts, int, other, &num_regshifts, 0);
MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the."
" IPMI register, in bits. For instance, if the data"
" is read from a 32-bit word and the IPMI data is in"
" bit 8-15, then the shift would be 8");
module_param_hw_array(slave_addrs, int, other, &num_slave_addrs, 0);
MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for"
" the controller. Normally this is 0x20, but can be"
" overridden by this parm. This is an array indexed"
" by interface number.");
int ipmi_si_hardcode_find_bmc(void)
{
int ret = -ENODEV;
int i;
struct si_sm_io io;
char *str;
/* Parse out the si_type string into its components. */
str = si_type_str;
if (*str != '\0') {
for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) {
si_type[i] = str;
str = strchr(str, ',');
if (str) {
*str = '\0';
str++;
} else {
break;
}
}
}
memset(&io, 0, sizeof(io));
for (i = 0; i < SI_MAX_PARMS; i++) {
if (!ports[i] && !addrs[i])
continue;
io.addr_source = SI_HARDCODED;
pr_info("probing via hardcoded address\n");
if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) {
io.si_type = SI_KCS;
} else if (strcmp(si_type[i], "smic") == 0) {
io.si_type = SI_SMIC;
} else if (strcmp(si_type[i], "bt") == 0) {
io.si_type = SI_BT;
} else {
pr_warn("Interface type specified for interface %d, was invalid: %s\n",
i, si_type[i]);
continue;
}
if (ports[i]) {
/* An I/O port */
io.addr_data = ports[i];
io.addr_type = IPMI_IO_ADDR_SPACE;
} else if (addrs[i]) {
/* A memory port */
io.addr_data = addrs[i];
io.addr_type = IPMI_MEM_ADDR_SPACE;
} else {
pr_warn("Interface type specified for interface %d, but port and address were not set or set to zero\n",
i);
continue;
}
io.addr = NULL;
io.regspacing = regspacings[i];
if (!io.regspacing)
io.regspacing = DEFAULT_REGSPACING;
io.regsize = regsizes[i];
if (!io.regsize)
io.regsize = DEFAULT_REGSIZE;
io.regshift = regshifts[i];
io.irq = irqs[i];
if (io.irq)
io.irq_setup = ipmi_std_irq_setup;
io.slave_addr = slave_addrs[i];
ret = ipmi_si_add_smi(&io);
}
return ret;
}
