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// SPDX-License-Identifier: GPL-2.0+
#define pr_fmt(fmt) "ipmi_hardcode: " fmt
#include <linux/moduleparam.h>
#include <linux/platform_device.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
#define MAX_SI_TYPE_STR 30
static char si_type_str[MAX_SI_TYPE_STR] __initdata;
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] __initdata;
static unsigned int num_irqs __initdata;
static int regspacings[SI_MAX_PARMS] __initdata;
static unsigned int num_regspacings __initdata;
static int regsizes[SI_MAX_PARMS] __initdata;
static unsigned int num_regsizes __initdata;
static int regshifts[SI_MAX_PARMS] __initdata;
static unsigned int num_regshifts __initdata;
static int slave_addrs[SI_MAX_PARMS] __initdata;
static unsigned int num_slave_addrs __initdata;
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.");
static struct platform_device *ipmi_hc_pdevs[SI_MAX_PARMS];
static void __init ipmi_hardcode_init_one(const char *si_type_str,
unsigned int i,
unsigned long addr,
unsigned int flags)
{
struct platform_device *pdev;
unsigned int num_r = 1, size;
struct resource r[4];
struct property_entry p[6];
enum si_type si_type;
unsigned int regspacing, regsize;
int rv;
memset(p, 0, sizeof(p));
memset(r, 0, sizeof(r));
if (!si_type_str || !*si_type_str || strcmp(si_type_str, "kcs") == 0) {
size = 2;
si_type = SI_KCS;
} else if (strcmp(si_type_str, "smic") == 0) {
size = 2;
si_type = SI_SMIC;
} else if (strcmp(si_type_str, "bt") == 0) {
size = 3;
si_type = SI_BT;
} else if (strcmp(si_type_str, "invalid") == 0) {
/*
* Allow a firmware-specified interface to be
* disabled.
*/
size = 1;
si_type = SI_TYPE_INVALID;
} else {
pr_warn("Interface type specified for interface %d, was invalid: %s\n",
i, si_type_str);
return;
}
regsize = regsizes[i];
if (regsize == 0)
regsize = DEFAULT_REGSIZE;
p[0] = PROPERTY_ENTRY_U8("ipmi-type", si_type);
p[1] = PROPERTY_ENTRY_U8("slave-addr", slave_addrs[i]);
p[2] = PROPERTY_ENTRY_U8("addr-source", SI_HARDCODED);
p[3] = PROPERTY_ENTRY_U8("reg-shift", regshifts[i]);
p[4] = PROPERTY_ENTRY_U8("reg-size", regsize);
/* Last entry must be left NULL to terminate it. */
/*
* Register spacing is derived from the resources in
* the IPMI platform code.
*/
regspacing = regspacings[i];
if (regspacing == 0)
regspacing = regsize;
r[0].start = addr;
r[0].end = r[0].start + regsize - 1;
r[0].name = "IPMI Address 1";
r[0].flags = flags;
if (size > 1) {
r[1].start = r[0].start + regspacing;
r[1].end = r[1].start + regsize - 1;
r[1].name = "IPMI Address 2";
r[1].flags = flags;
num_r++;
}
if (size > 2) {
r[2].start = r[1].start + regspacing;
r[2].end = r[2].start + regsize - 1;
r[2].name = "IPMI Address 3";
r[2].flags = flags;
num_r++;
}
if (irqs[i]) {
r[num_r].start = irqs[i];
r[num_r].end = irqs[i];
r[num_r].name = "IPMI IRQ";
r[num_r].flags = IORESOURCE_IRQ;
num_r++;
}
pdev = platform_device_alloc("hardcode-ipmi-si", i);
if (!pdev) {
pr_err("Error allocating IPMI platform device %d\n", i);
return;
}
rv = platform_device_add_resources(pdev, r, num_r);
if (rv) {
dev_err(&pdev->dev,
"Unable to add hard-code resources: %d\n", rv);
goto err;
}
rv = platform_device_add_properties(pdev, p);
if (rv) {
dev_err(&pdev->dev,
"Unable to add hard-code properties: %d\n", rv);
goto err;
}
rv = platform_device_add(pdev);
if (rv) {
dev_err(&pdev->dev,
"Unable to add hard-code device: %d\n", rv);
goto err;
}
ipmi_hc_pdevs[i] = pdev;
return;
err:
platform_device_put(pdev);
}
void __init ipmi_hardcode_init(void)
{
unsigned int i;
char *str;
char *si_type[SI_MAX_PARMS];
/* 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;
}
}
}
for (i = 0; i < SI_MAX_PARMS; i++) {
if (i < num_ports && ports[i])
ipmi_hardcode_init_one(si_type[i], i, ports[i],
IORESOURCE_IO);
if (i < num_addrs && addrs[i])
ipmi_hardcode_init_one(si_type[i], i, addrs[i],
IORESOURCE_MEM);
}
}
void ipmi_si_hardcode_exit(void)
{
unsigned int i;
for (i = 0; i < SI_MAX_PARMS; i++) {
if (ipmi_hc_pdevs[i])
platform_device_unregister(ipmi_hc_pdevs[i]);
}
}
/*
* Returns true of the given address exists as a hardcoded address,
* false if not.
*/
int ipmi_si_hardcode_match(int addr_type, unsigned long addr)
{
unsigned int i;
if (addr_type == IPMI_IO_ADDR_SPACE) {
for (i = 0; i < num_ports; i++) {
if (ports[i] == addr)
return 1;
}
} else {
for (i = 0; i < num_addrs; i++) {
if (addrs[i] == addr)
return 1;
}
}
return 0;
}
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