1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0+
2*4882a593Smuzhiyun
3*4882a593Smuzhiyun /*
4*4882a593Smuzhiyun * Add an IPMI platform device.
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #include <linux/platform_device.h>
8*4882a593Smuzhiyun #include "ipmi_plat_data.h"
9*4882a593Smuzhiyun #include "ipmi_si.h"
10*4882a593Smuzhiyun
ipmi_platform_add(const char * name,unsigned int inst,struct ipmi_plat_data * p)11*4882a593Smuzhiyun struct platform_device *ipmi_platform_add(const char *name, unsigned int inst,
12*4882a593Smuzhiyun struct ipmi_plat_data *p)
13*4882a593Smuzhiyun {
14*4882a593Smuzhiyun struct platform_device *pdev;
15*4882a593Smuzhiyun unsigned int num_r = 1, size = 0, pidx = 0;
16*4882a593Smuzhiyun struct resource r[4];
17*4882a593Smuzhiyun struct property_entry pr[6];
18*4882a593Smuzhiyun u32 flags;
19*4882a593Smuzhiyun int rv;
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun memset(pr, 0, sizeof(pr));
22*4882a593Smuzhiyun memset(r, 0, sizeof(r));
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun if (p->iftype == IPMI_PLAT_IF_SI) {
25*4882a593Smuzhiyun if (p->type == SI_BT)
26*4882a593Smuzhiyun size = 3;
27*4882a593Smuzhiyun else if (p->type != SI_TYPE_INVALID)
28*4882a593Smuzhiyun size = 2;
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun if (p->regsize == 0)
31*4882a593Smuzhiyun p->regsize = DEFAULT_REGSIZE;
32*4882a593Smuzhiyun if (p->regspacing == 0)
33*4882a593Smuzhiyun p->regspacing = p->regsize;
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun pr[pidx++] = PROPERTY_ENTRY_U8("ipmi-type", p->type);
36*4882a593Smuzhiyun } else if (p->iftype == IPMI_PLAT_IF_SSIF) {
37*4882a593Smuzhiyun pr[pidx++] = PROPERTY_ENTRY_U16("i2c-addr", p->addr);
38*4882a593Smuzhiyun }
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun if (p->slave_addr)
41*4882a593Smuzhiyun pr[pidx++] = PROPERTY_ENTRY_U8("slave-addr", p->slave_addr);
42*4882a593Smuzhiyun pr[pidx++] = PROPERTY_ENTRY_U8("addr-source", p->addr_source);
43*4882a593Smuzhiyun if (p->regshift)
44*4882a593Smuzhiyun pr[pidx++] = PROPERTY_ENTRY_U8("reg-shift", p->regshift);
45*4882a593Smuzhiyun pr[pidx++] = PROPERTY_ENTRY_U8("reg-size", p->regsize);
46*4882a593Smuzhiyun /* Last entry must be left NULL to terminate it. */
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun pdev = platform_device_alloc(name, inst);
49*4882a593Smuzhiyun if (!pdev) {
50*4882a593Smuzhiyun pr_err("Error allocating IPMI platform device %s.%d\n",
51*4882a593Smuzhiyun name, inst);
52*4882a593Smuzhiyun return NULL;
53*4882a593Smuzhiyun }
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun if (size == 0)
56*4882a593Smuzhiyun /* An invalid or SSIF interface, no resources. */
57*4882a593Smuzhiyun goto add_properties;
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun /*
60*4882a593Smuzhiyun * Register spacing is derived from the resources in
61*4882a593Smuzhiyun * the IPMI platform code.
62*4882a593Smuzhiyun */
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun if (p->space == IPMI_IO_ADDR_SPACE)
65*4882a593Smuzhiyun flags = IORESOURCE_IO;
66*4882a593Smuzhiyun else
67*4882a593Smuzhiyun flags = IORESOURCE_MEM;
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun r[0].start = p->addr;
70*4882a593Smuzhiyun r[0].end = r[0].start + p->regsize - 1;
71*4882a593Smuzhiyun r[0].name = "IPMI Address 1";
72*4882a593Smuzhiyun r[0].flags = flags;
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun if (size > 1) {
75*4882a593Smuzhiyun r[1].start = r[0].start + p->regspacing;
76*4882a593Smuzhiyun r[1].end = r[1].start + p->regsize - 1;
77*4882a593Smuzhiyun r[1].name = "IPMI Address 2";
78*4882a593Smuzhiyun r[1].flags = flags;
79*4882a593Smuzhiyun num_r++;
80*4882a593Smuzhiyun }
81*4882a593Smuzhiyun
82*4882a593Smuzhiyun if (size > 2) {
83*4882a593Smuzhiyun r[2].start = r[1].start + p->regspacing;
84*4882a593Smuzhiyun r[2].end = r[2].start + p->regsize - 1;
85*4882a593Smuzhiyun r[2].name = "IPMI Address 3";
86*4882a593Smuzhiyun r[2].flags = flags;
87*4882a593Smuzhiyun num_r++;
88*4882a593Smuzhiyun }
89*4882a593Smuzhiyun
90*4882a593Smuzhiyun if (p->irq) {
91*4882a593Smuzhiyun r[num_r].start = p->irq;
92*4882a593Smuzhiyun r[num_r].end = p->irq;
93*4882a593Smuzhiyun r[num_r].name = "IPMI IRQ";
94*4882a593Smuzhiyun r[num_r].flags = IORESOURCE_IRQ;
95*4882a593Smuzhiyun num_r++;
96*4882a593Smuzhiyun }
97*4882a593Smuzhiyun
98*4882a593Smuzhiyun rv = platform_device_add_resources(pdev, r, num_r);
99*4882a593Smuzhiyun if (rv) {
100*4882a593Smuzhiyun dev_err(&pdev->dev,
101*4882a593Smuzhiyun "Unable to add hard-code resources: %d\n", rv);
102*4882a593Smuzhiyun goto err;
103*4882a593Smuzhiyun }
104*4882a593Smuzhiyun add_properties:
105*4882a593Smuzhiyun rv = platform_device_add_properties(pdev, pr);
106*4882a593Smuzhiyun if (rv) {
107*4882a593Smuzhiyun dev_err(&pdev->dev,
108*4882a593Smuzhiyun "Unable to add hard-code properties: %d\n", rv);
109*4882a593Smuzhiyun goto err;
110*4882a593Smuzhiyun }
111*4882a593Smuzhiyun
112*4882a593Smuzhiyun rv = platform_device_add(pdev);
113*4882a593Smuzhiyun if (rv) {
114*4882a593Smuzhiyun dev_err(&pdev->dev,
115*4882a593Smuzhiyun "Unable to add hard-code device: %d\n", rv);
116*4882a593Smuzhiyun goto err;
117*4882a593Smuzhiyun }
118*4882a593Smuzhiyun return pdev;
119*4882a593Smuzhiyun
120*4882a593Smuzhiyun err:
121*4882a593Smuzhiyun platform_device_put(pdev);
122*4882a593Smuzhiyun return NULL;
123*4882a593Smuzhiyun }
124*4882a593Smuzhiyun EXPORT_SYMBOL(ipmi_platform_add);
125