4 * Handling for IPMI devices on the PCI bus.
6 #include <linux/module.h>
10 #define PFX "ipmi_pci: "
12 static bool pci_registered;
14 static bool si_trypci = true;
16 module_param_named(trypci, si_trypci, bool, 0);
17 MODULE_PARM_DESC(trypci, "Setting this to zero will disable the"
18 " default scan of the interfaces identified via pci");
20 #define PCI_ERMC_CLASSCODE 0x0C0700
21 #define PCI_ERMC_CLASSCODE_MASK 0xffffff00
22 #define PCI_ERMC_CLASSCODE_TYPE_MASK 0xff
23 #define PCI_ERMC_CLASSCODE_TYPE_SMIC 0x00
24 #define PCI_ERMC_CLASSCODE_TYPE_KCS 0x01
25 #define PCI_ERMC_CLASSCODE_TYPE_BT 0x02
27 #define PCI_HP_VENDOR_ID 0x103C
28 #define PCI_MMC_DEVICE_ID 0x121A
29 #define PCI_MMC_ADDR_CW 0x10
31 static void ipmi_pci_cleanup(struct si_sm_io *io)
33 struct pci_dev *pdev = io->addr_source_data;
35 pci_disable_device(pdev);
38 static int ipmi_pci_probe_regspacing(struct si_sm_io *io)
40 if (io->si_type == SI_KCS) {
44 io->regsize = DEFAULT_REGSIZE;
47 /* detect 1, 4, 16byte spacing */
48 for (regspacing = DEFAULT_REGSPACING; regspacing <= 16;) {
49 io->regspacing = regspacing;
50 if (io->io_setup(io)) {
52 "Could not setup I/O space\n");
53 return DEFAULT_REGSPACING;
55 /* write invalid cmd */
56 io->outputb(io, 1, 0x10);
57 /* read status back */
58 status = io->inputb(io, 1);
65 return DEFAULT_REGSPACING;
68 static int ipmi_pci_probe(struct pci_dev *pdev,
69 const struct pci_device_id *ent)
72 int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK;
75 memset(&io, 0, sizeof(io));
76 io.addr_source = SI_PCI;
77 dev_info(&pdev->dev, "probing via PCI");
80 case PCI_ERMC_CLASSCODE_TYPE_SMIC:
84 case PCI_ERMC_CLASSCODE_TYPE_KCS:
88 case PCI_ERMC_CLASSCODE_TYPE_BT:
93 dev_info(&pdev->dev, "Unknown IPMI type: %d\n", class_type);
97 rv = pci_enable_device(pdev);
99 dev_err(&pdev->dev, "couldn't enable PCI device\n");
103 io.addr_source_cleanup = ipmi_pci_cleanup;
104 io.addr_source_data = pdev;
106 if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) {
107 io.addr_type = IPMI_IO_ADDR_SPACE;
108 io.io_setup = ipmi_si_port_setup;
110 io.addr_type = IPMI_MEM_ADDR_SPACE;
111 io.io_setup = ipmi_si_mem_setup;
113 io.addr_data = pci_resource_start(pdev, 0);
115 io.regspacing = ipmi_pci_probe_regspacing(&io);
116 io.regsize = DEFAULT_REGSIZE;
121 io.irq_setup = ipmi_std_irq_setup;
125 dev_info(&pdev->dev, "%pR regsize %d spacing %d irq %d\n",
126 &pdev->resource[0], io.regsize, io.regspacing, io.irq);
128 rv = ipmi_si_add_smi(&io);
130 pci_disable_device(pdev);
135 static void ipmi_pci_remove(struct pci_dev *pdev)
137 ipmi_si_remove_by_dev(&pdev->dev);
140 static const struct pci_device_id ipmi_pci_devices[] = {
141 { PCI_DEVICE(PCI_HP_VENDOR_ID, PCI_MMC_DEVICE_ID) },
142 { PCI_DEVICE_CLASS(PCI_ERMC_CLASSCODE, PCI_ERMC_CLASSCODE_MASK) },
145 MODULE_DEVICE_TABLE(pci, ipmi_pci_devices);
147 static struct pci_driver ipmi_pci_driver = {
149 .id_table = ipmi_pci_devices,
150 .probe = ipmi_pci_probe,
151 .remove = ipmi_pci_remove,
154 void ipmi_si_pci_init(void)
157 int rv = pci_register_driver(&ipmi_pci_driver);
159 pr_err(PFX "Unable to register PCI driver: %d\n", rv);
161 pci_registered = true;
165 void ipmi_si_pci_shutdown(void)
168 pci_unregister_driver(&ipmi_pci_driver);