1 // SPDX-License-Identifier: GPL-2.0+ 2 3 #define pr_fmt(fmt) "ipmi_hardcode: " fmt 4 5 #include <linux/moduleparam.h> 6 #include <linux/platform_device.h> 7 #include "ipmi_si.h" 8 #include "ipmi_plat_data.h" 9 10 /* 11 * There can be 4 IO ports passed in (with or without IRQs), 4 addresses, 12 * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS. 13 */ 14 15 #define SI_MAX_PARMS 4 16 17 #define MAX_SI_TYPE_STR 30 18 static char si_type_str[MAX_SI_TYPE_STR] __initdata; 19 static unsigned long addrs[SI_MAX_PARMS]; 20 static unsigned int num_addrs; 21 static unsigned int ports[SI_MAX_PARMS]; 22 static unsigned int num_ports; 23 static int irqs[SI_MAX_PARMS] __initdata; 24 static unsigned int num_irqs __initdata; 25 static int regspacings[SI_MAX_PARMS] __initdata; 26 static unsigned int num_regspacings __initdata; 27 static int regsizes[SI_MAX_PARMS] __initdata; 28 static unsigned int num_regsizes __initdata; 29 static int regshifts[SI_MAX_PARMS] __initdata; 30 static unsigned int num_regshifts __initdata; 31 static int slave_addrs[SI_MAX_PARMS] __initdata; 32 static unsigned int num_slave_addrs __initdata; 33 34 module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0); 35 MODULE_PARM_DESC(type, "Defines the type of each interface, each" 36 " interface separated by commas. The types are 'kcs'," 37 " 'smic', and 'bt'. For example si_type=kcs,bt will set" 38 " the first interface to kcs and the second to bt"); 39 module_param_hw_array(addrs, ulong, iomem, &num_addrs, 0); 40 MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the" 41 " addresses separated by commas. Only use if an interface" 42 " is in memory. Otherwise, set it to zero or leave" 43 " it blank."); 44 module_param_hw_array(ports, uint, ioport, &num_ports, 0); 45 MODULE_PARM_DESC(ports, "Sets the port address of each interface, the" 46 " addresses separated by commas. Only use if an interface" 47 " is a port. Otherwise, set it to zero or leave" 48 " it blank."); 49 module_param_hw_array(irqs, int, irq, &num_irqs, 0); 50 MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the" 51 " addresses separated by commas. Only use if an interface" 52 " has an interrupt. Otherwise, set it to zero or leave" 53 " it blank."); 54 module_param_hw_array(regspacings, int, other, &num_regspacings, 0); 55 MODULE_PARM_DESC(regspacings, "The number of bytes between the start address" 56 " and each successive register used by the interface. For" 57 " instance, if the start address is 0xca2 and the spacing" 58 " is 2, then the second address is at 0xca4. Defaults" 59 " to 1."); 60 module_param_hw_array(regsizes, int, other, &num_regsizes, 0); 61 MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes." 62 " This should generally be 1, 2, 4, or 8 for an 8-bit," 63 " 16-bit, 32-bit, or 64-bit register. Use this if you" 64 " the 8-bit IPMI register has to be read from a larger" 65 " register."); 66 module_param_hw_array(regshifts, int, other, &num_regshifts, 0); 67 MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the." 68 " IPMI register, in bits. For instance, if the data" 69 " is read from a 32-bit word and the IPMI data is in" 70 " bit 8-15, then the shift would be 8"); 71 module_param_hw_array(slave_addrs, int, other, &num_slave_addrs, 0); 72 MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for" 73 " the controller. Normally this is 0x20, but can be" 74 " overridden by this parm. This is an array indexed" 75 " by interface number."); 76 77 static void __init ipmi_hardcode_init_one(const char *si_type_str, 78 unsigned int i, 79 unsigned long addr, 80 enum ipmi_addr_space addr_space) 81 { 82 struct ipmi_plat_data p; 83 84 memset(&p, 0, sizeof(p)); 85 86 if (!si_type_str || !*si_type_str || strcmp(si_type_str, "kcs") == 0) { 87 p.type = SI_KCS; 88 } else if (strcmp(si_type_str, "smic") == 0) { 89 p.type = SI_SMIC; 90 } else if (strcmp(si_type_str, "bt") == 0) { 91 p.type = SI_BT; 92 } else if (strcmp(si_type_str, "invalid") == 0) { 93 /* 94 * Allow a firmware-specified interface to be 95 * disabled. 96 */ 97 p.type = SI_TYPE_INVALID; 98 } else { 99 pr_warn("Interface type specified for interface %d, was invalid: %s\n", 100 i, si_type_str); 101 return; 102 } 103 104 p.regsize = regsizes[i]; 105 p.slave_addr = slave_addrs[i]; 106 p.addr_source = SI_HARDCODED; 107 p.regshift = regshifts[i]; 108 p.regsize = regsizes[i]; 109 p.addr = addr; 110 p.space = addr_space; 111 112 ipmi_platform_add("hardcode-ipmi-si", i, &p); 113 } 114 115 void __init ipmi_hardcode_init(void) 116 { 117 unsigned int i; 118 char *str; 119 char *si_type[SI_MAX_PARMS]; 120 121 /* Parse out the si_type string into its components. */ 122 str = si_type_str; 123 if (*str != '\0') { 124 for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) { 125 si_type[i] = str; 126 str = strchr(str, ','); 127 if (str) { 128 *str = '\0'; 129 str++; 130 } else { 131 break; 132 } 133 } 134 } 135 136 for (i = 0; i < SI_MAX_PARMS; i++) { 137 if (i < num_ports && ports[i]) 138 ipmi_hardcode_init_one(si_type[i], i, ports[i], 139 IPMI_IO_ADDR_SPACE); 140 if (i < num_addrs && addrs[i]) 141 ipmi_hardcode_init_one(si_type[i], i, addrs[i], 142 IPMI_MEM_ADDR_SPACE); 143 } 144 } 145 146 147 void ipmi_si_hardcode_exit(void) 148 { 149 ipmi_remove_platform_device_by_name("hardcode-ipmi-si"); 150 } 151 152 /* 153 * Returns true of the given address exists as a hardcoded address, 154 * false if not. 155 */ 156 int ipmi_si_hardcode_match(int addr_space, unsigned long addr) 157 { 158 unsigned int i; 159 160 if (addr_space == IPMI_IO_ADDR_SPACE) { 161 for (i = 0; i < num_ports; i++) { 162 if (ports[i] == addr) 163 return 1; 164 } 165 } else { 166 for (i = 0; i < num_addrs; i++) { 167 if (addrs[i] == addr) 168 return 1; 169 } 170 } 171 172 return 0; 173 } 174