262 lines
7.3 KiB
C
262 lines
7.3 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
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#include <linux/moduleparam.h>
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#include <linux/platform_device.h>
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#include "ipmi_si.h"
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#define PFX "ipmi_hardcode: "
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/*
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* There can be 4 IO ports passed in (with or without IRQs), 4 addresses,
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* a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS.
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*/
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#define SI_MAX_PARMS 4
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#define MAX_SI_TYPE_STR 30
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static char si_type_str[MAX_SI_TYPE_STR] __initdata;
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static unsigned long addrs[SI_MAX_PARMS];
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static unsigned int num_addrs;
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static unsigned int ports[SI_MAX_PARMS];
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static unsigned int num_ports;
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static int irqs[SI_MAX_PARMS] __initdata;
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static unsigned int num_irqs __initdata;
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static int regspacings[SI_MAX_PARMS] __initdata;
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static unsigned int num_regspacings __initdata;
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static int regsizes[SI_MAX_PARMS] __initdata;
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static unsigned int num_regsizes __initdata;
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static int regshifts[SI_MAX_PARMS] __initdata;
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static unsigned int num_regshifts __initdata;
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static int slave_addrs[SI_MAX_PARMS] __initdata;
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static unsigned int num_slave_addrs __initdata;
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module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0);
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MODULE_PARM_DESC(type, "Defines the type of each interface, each"
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" interface separated by commas. The types are 'kcs',"
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" 'smic', and 'bt'. For example si_type=kcs,bt will set"
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" the first interface to kcs and the second to bt");
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module_param_hw_array(addrs, ulong, iomem, &num_addrs, 0);
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MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the"
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" addresses separated by commas. Only use if an interface"
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" is in memory. Otherwise, set it to zero or leave"
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" it blank.");
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module_param_hw_array(ports, uint, ioport, &num_ports, 0);
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MODULE_PARM_DESC(ports, "Sets the port address of each interface, the"
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" addresses separated by commas. Only use if an interface"
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" is a port. Otherwise, set it to zero or leave"
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" it blank.");
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module_param_hw_array(irqs, int, irq, &num_irqs, 0);
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MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the"
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" addresses separated by commas. Only use if an interface"
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" has an interrupt. Otherwise, set it to zero or leave"
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" it blank.");
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module_param_hw_array(regspacings, int, other, &num_regspacings, 0);
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MODULE_PARM_DESC(regspacings, "The number of bytes between the start address"
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" and each successive register used by the interface. For"
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" instance, if the start address is 0xca2 and the spacing"
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" is 2, then the second address is at 0xca4. Defaults"
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" to 1.");
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module_param_hw_array(regsizes, int, other, &num_regsizes, 0);
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MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes."
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" This should generally be 1, 2, 4, or 8 for an 8-bit,"
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" 16-bit, 32-bit, or 64-bit register. Use this if you"
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" the 8-bit IPMI register has to be read from a larger"
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" register.");
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module_param_hw_array(regshifts, int, other, &num_regshifts, 0);
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MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the."
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" IPMI register, in bits. For instance, if the data"
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" is read from a 32-bit word and the IPMI data is in"
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" bit 8-15, then the shift would be 8");
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module_param_hw_array(slave_addrs, int, other, &num_slave_addrs, 0);
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MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for"
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" the controller. Normally this is 0x20, but can be"
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" overridden by this parm. This is an array indexed"
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" by interface number.");
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static struct platform_device *ipmi_hc_pdevs[SI_MAX_PARMS];
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static void __init ipmi_hardcode_init_one(const char *si_type_str,
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unsigned int i,
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unsigned long addr,
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unsigned int flags)
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{
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struct platform_device *pdev;
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unsigned int num_r = 1, size;
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struct resource r[4];
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struct property_entry p[6];
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enum si_type si_type;
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unsigned int regspacing, regsize;
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int rv;
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memset(p, 0, sizeof(p));
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memset(r, 0, sizeof(r));
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if (!si_type_str || !*si_type_str || strcmp(si_type_str, "kcs") == 0) {
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size = 2;
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si_type = SI_KCS;
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} else if (strcmp(si_type_str, "smic") == 0) {
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size = 2;
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si_type = SI_SMIC;
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} else if (strcmp(si_type_str, "bt") == 0) {
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size = 3;
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si_type = SI_BT;
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} else if (strcmp(si_type_str, "invalid") == 0) {
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/*
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* Allow a firmware-specified interface to be
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* disabled.
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*/
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size = 1;
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si_type = SI_TYPE_INVALID;
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} else {
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pr_warn("Interface type specified for interface %d, was invalid: %s\n",
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i, si_type_str);
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return;
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}
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regsize = regsizes[i];
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if (regsize == 0)
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regsize = DEFAULT_REGSIZE;
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p[0] = PROPERTY_ENTRY_U8("ipmi-type", si_type);
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p[1] = PROPERTY_ENTRY_U8("slave-addr", slave_addrs[i]);
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p[2] = PROPERTY_ENTRY_U8("addr-source", SI_HARDCODED);
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p[3] = PROPERTY_ENTRY_U8("reg-shift", regshifts[i]);
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p[4] = PROPERTY_ENTRY_U8("reg-size", regsize);
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/* Last entry must be left NULL to terminate it. */
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/*
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* Register spacing is derived from the resources in
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* the IPMI platform code.
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*/
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regspacing = regspacings[i];
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if (regspacing == 0)
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regspacing = regsize;
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r[0].start = addr;
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r[0].end = r[0].start + regsize - 1;
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r[0].name = "IPMI Address 1";
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r[0].flags = flags;
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if (size > 1) {
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r[1].start = r[0].start + regspacing;
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r[1].end = r[1].start + regsize - 1;
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r[1].name = "IPMI Address 2";
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r[1].flags = flags;
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num_r++;
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}
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if (size > 2) {
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r[2].start = r[1].start + regspacing;
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r[2].end = r[2].start + regsize - 1;
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r[2].name = "IPMI Address 3";
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r[2].flags = flags;
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num_r++;
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}
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if (irqs[i]) {
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r[num_r].start = irqs[i];
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r[num_r].end = irqs[i];
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r[num_r].name = "IPMI IRQ";
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r[num_r].flags = IORESOURCE_IRQ;
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num_r++;
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}
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pdev = platform_device_alloc("hardcode-ipmi-si", i);
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if (!pdev) {
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pr_err("Error allocating IPMI platform device %d\n", i);
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return;
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}
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rv = platform_device_add_resources(pdev, r, num_r);
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if (rv) {
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dev_err(&pdev->dev,
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"Unable to add hard-code resources: %d\n", rv);
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goto err;
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}
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rv = platform_device_add_properties(pdev, p);
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if (rv) {
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dev_err(&pdev->dev,
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"Unable to add hard-code properties: %d\n", rv);
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goto err;
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}
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rv = platform_device_add(pdev);
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if (rv) {
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dev_err(&pdev->dev,
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"Unable to add hard-code device: %d\n", rv);
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goto err;
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}
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ipmi_hc_pdevs[i] = pdev;
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return;
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err:
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platform_device_put(pdev);
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}
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void __init ipmi_hardcode_init(void)
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{
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unsigned int i;
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char *str;
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char *si_type[SI_MAX_PARMS];
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memset(si_type, 0, sizeof(si_type));
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/* Parse out the si_type string into its components. */
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str = si_type_str;
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if (*str != '\0') {
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for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) {
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si_type[i] = str;
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str = strchr(str, ',');
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if (str) {
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*str = '\0';
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str++;
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} else {
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break;
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}
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}
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}
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for (i = 0; i < SI_MAX_PARMS; i++) {
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if (i < num_ports && ports[i])
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ipmi_hardcode_init_one(si_type[i], i, ports[i],
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IORESOURCE_IO);
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if (i < num_addrs && addrs[i])
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ipmi_hardcode_init_one(si_type[i], i, addrs[i],
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IORESOURCE_MEM);
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}
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}
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void ipmi_si_hardcode_exit(void)
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{
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unsigned int i;
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for (i = 0; i < SI_MAX_PARMS; i++) {
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if (ipmi_hc_pdevs[i])
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platform_device_unregister(ipmi_hc_pdevs[i]);
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}
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}
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/*
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* Returns true of the given address exists as a hardcoded address,
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* false if not.
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*/
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int ipmi_si_hardcode_match(int addr_type, unsigned long addr)
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{
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unsigned int i;
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if (addr_type == IPMI_IO_ADDR_SPACE) {
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for (i = 0; i < num_ports; i++) {
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if (ports[i] == addr)
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return 1;
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}
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} else {
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for (i = 0; i < num_addrs; i++) {
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if (addrs[i] == addr)
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return 1;
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}
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}
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return 0;
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}
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