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Commit | Line | Data |
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13d0b35c CM |
1 | /* |
2 | * ipmi_si_pci.c | |
3 | * | |
4 | * Handling for IPMI devices on the PCI bus. | |
5 | */ | |
6 | #include <linux/module.h> | |
7 | #include <linux/pci.h> | |
8 | #include "ipmi_si.h" | |
9 | ||
10 | #define PFX "ipmi_pci: " | |
11 | ||
12 | static bool pci_registered; | |
13 | ||
14 | static bool si_trypci = true; | |
15 | ||
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"); | |
19 | ||
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 | |
26 | ||
27 | #define PCI_HP_VENDOR_ID 0x103C | |
28 | #define PCI_MMC_DEVICE_ID 0x121A | |
29 | #define PCI_MMC_ADDR_CW 0x10 | |
30 | ||
31 | static void ipmi_pci_cleanup(struct si_sm_io *io) | |
32 | { | |
33 | struct pci_dev *pdev = io->addr_source_data; | |
34 | ||
35 | pci_disable_device(pdev); | |
36 | } | |
37 | ||
38 | static int ipmi_pci_probe_regspacing(struct si_sm_io *io) | |
39 | { | |
40 | if (io->si_type == SI_KCS) { | |
41 | unsigned char status; | |
42 | int regspacing; | |
43 | ||
44 | io->regsize = DEFAULT_REGSIZE; | |
45 | io->regshift = 0; | |
46 | ||
47 | /* detect 1, 4, 16byte spacing */ | |
48 | for (regspacing = DEFAULT_REGSPACING; regspacing <= 16;) { | |
49 | io->regspacing = regspacing; | |
50 | if (io->io_setup(io)) { | |
51 | dev_err(io->dev, | |
52 | "Could not setup I/O space\n"); | |
53 | return DEFAULT_REGSPACING; | |
54 | } | |
55 | /* write invalid cmd */ | |
56 | io->outputb(io, 1, 0x10); | |
57 | /* read status back */ | |
58 | status = io->inputb(io, 1); | |
59 | io->io_cleanup(io); | |
60 | if (status) | |
61 | return regspacing; | |
62 | regspacing *= 4; | |
63 | } | |
64 | } | |
65 | return DEFAULT_REGSPACING; | |
66 | } | |
67 | ||
68 | static int ipmi_pci_probe(struct pci_dev *pdev, | |
69 | const struct pci_device_id *ent) | |
70 | { | |
71 | int rv; | |
72 | int class_type = pdev->class & PCI_ERMC_CLASSCODE_TYPE_MASK; | |
73 | struct si_sm_io io; | |
74 | ||
75 | memset(&io, 0, sizeof(io)); | |
76 | io.addr_source = SI_PCI; | |
77 | dev_info(&pdev->dev, "probing via PCI"); | |
78 | ||
79 | switch (class_type) { | |
80 | case PCI_ERMC_CLASSCODE_TYPE_SMIC: | |
81 | io.si_type = SI_SMIC; | |
82 | break; | |
83 | ||
84 | case PCI_ERMC_CLASSCODE_TYPE_KCS: | |
85 | io.si_type = SI_KCS; | |
86 | break; | |
87 | ||
88 | case PCI_ERMC_CLASSCODE_TYPE_BT: | |
89 | io.si_type = SI_BT; | |
90 | break; | |
91 | ||
92 | default: | |
93 | dev_info(&pdev->dev, "Unknown IPMI type: %d\n", class_type); | |
94 | return -ENOMEM; | |
95 | } | |
96 | ||
97 | rv = pci_enable_device(pdev); | |
98 | if (rv) { | |
99 | dev_err(&pdev->dev, "couldn't enable PCI device\n"); | |
100 | return rv; | |
101 | } | |
102 | ||
103 | io.addr_source_cleanup = ipmi_pci_cleanup; | |
104 | io.addr_source_data = pdev; | |
105 | ||
1ac8aa8d | 106 | if (pci_resource_flags(pdev, 0) & IORESOURCE_IO) { |
13d0b35c | 107 | io.addr_type = IPMI_IO_ADDR_SPACE; |
1ac8aa8d CM |
108 | io.io_setup = ipmi_si_port_setup; |
109 | } else { | |
13d0b35c | 110 | io.addr_type = IPMI_MEM_ADDR_SPACE; |
1ac8aa8d CM |
111 | io.io_setup = ipmi_si_mem_setup; |
112 | } | |
13d0b35c CM |
113 | io.addr_data = pci_resource_start(pdev, 0); |
114 | ||
115 | io.regspacing = ipmi_pci_probe_regspacing(&io); | |
116 | io.regsize = DEFAULT_REGSIZE; | |
117 | io.regshift = 0; | |
118 | ||
119 | io.irq = pdev->irq; | |
120 | if (io.irq) | |
121 | io.irq_setup = ipmi_std_irq_setup; | |
122 | ||
123 | io.dev = &pdev->dev; | |
124 | ||
125 | dev_info(&pdev->dev, "%pR regsize %d spacing %d irq %d\n", | |
126 | &pdev->resource[0], io.regsize, io.regspacing, io.irq); | |
127 | ||
128 | rv = ipmi_si_add_smi(&io); | |
129 | if (rv) | |
130 | pci_disable_device(pdev); | |
131 | ||
132 | return rv; | |
133 | } | |
134 | ||
135 | static void ipmi_pci_remove(struct pci_dev *pdev) | |
136 | { | |
137 | ipmi_si_remove_by_dev(&pdev->dev); | |
138 | } | |
139 | ||
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) }, | |
143 | { 0, } | |
144 | }; | |
145 | MODULE_DEVICE_TABLE(pci, ipmi_pci_devices); | |
146 | ||
147 | static struct pci_driver ipmi_pci_driver = { | |
148 | .name = DEVICE_NAME, | |
149 | .id_table = ipmi_pci_devices, | |
150 | .probe = ipmi_pci_probe, | |
151 | .remove = ipmi_pci_remove, | |
152 | }; | |
153 | ||
154 | void ipmi_si_pci_init(void) | |
155 | { | |
156 | if (si_trypci) { | |
157 | int rv = pci_register_driver(&ipmi_pci_driver); | |
158 | if (rv) | |
159 | pr_err(PFX "Unable to register PCI driver: %d\n", rv); | |
160 | else | |
161 | pci_registered = true; | |
162 | } | |
163 | } | |
164 | ||
165 | void ipmi_si_pci_shutdown(void) | |
166 | { | |
167 | if (pci_registered) | |
168 | pci_unregister_driver(&ipmi_pci_driver); | |
169 | } |