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7#include <linux/bitfield.h>
8#include <linux/init.h>
9#include <linux/mfd/core.h>
10#include <linux/mfd/intel-m10-bmc.h>
11#include <linux/module.h>
12#include <linux/mutex.h>
13#include <linux/regmap.h>
14#include <linux/spi/spi.h>
15
16enum m10bmc_type {
17 M10_N3000,
18 M10_D5005,
19 M10_N5010,
20};
21
22static struct mfd_cell m10bmc_d5005_subdevs[] = {
23 { .name = "d5005bmc-hwmon" },
24};
25
26static struct mfd_cell m10bmc_pacn3000_subdevs[] = {
27 { .name = "n3000bmc-hwmon" },
28 { .name = "n3000bmc-retimer" },
29 { .name = "n3000bmc-secure" },
30};
31
32static struct mfd_cell m10bmc_n5010_subdevs[] = {
33 { .name = "n5010bmc-hwmon" },
34};
35
36static const struct regmap_range m10bmc_regmap_range[] = {
37 regmap_reg_range(M10BMC_LEGACY_BUILD_VER, M10BMC_LEGACY_BUILD_VER),
38 regmap_reg_range(M10BMC_SYS_BASE, M10BMC_SYS_END),
39 regmap_reg_range(M10BMC_FLASH_BASE, M10BMC_FLASH_END),
40};
41
42static const struct regmap_access_table m10bmc_access_table = {
43 .yes_ranges = m10bmc_regmap_range,
44 .n_yes_ranges = ARRAY_SIZE(m10bmc_regmap_range),
45};
46
47static struct regmap_config intel_m10bmc_regmap_config = {
48 .reg_bits = 32,
49 .val_bits = 32,
50 .reg_stride = 4,
51 .wr_table = &m10bmc_access_table,
52 .rd_table = &m10bmc_access_table,
53 .max_register = M10BMC_MEM_END,
54};
55
56static ssize_t bmc_version_show(struct device *dev,
57 struct device_attribute *attr, char *buf)
58{
59 struct intel_m10bmc *ddata = dev_get_drvdata(dev);
60 unsigned int val;
61 int ret;
62
63 ret = m10bmc_sys_read(ddata, M10BMC_BUILD_VER, &val);
64 if (ret)
65 return ret;
66
67 return sprintf(buf, "0x%x\n", val);
68}
69static DEVICE_ATTR_RO(bmc_version);
70
71static ssize_t bmcfw_version_show(struct device *dev,
72 struct device_attribute *attr, char *buf)
73{
74 struct intel_m10bmc *ddata = dev_get_drvdata(dev);
75 unsigned int val;
76 int ret;
77
78 ret = m10bmc_sys_read(ddata, NIOS2_FW_VERSION, &val);
79 if (ret)
80 return ret;
81
82 return sprintf(buf, "0x%x\n", val);
83}
84static DEVICE_ATTR_RO(bmcfw_version);
85
86static ssize_t mac_address_show(struct device *dev,
87 struct device_attribute *attr, char *buf)
88{
89 struct intel_m10bmc *max10 = dev_get_drvdata(dev);
90 unsigned int macaddr_low, macaddr_high;
91 int ret;
92
93 ret = m10bmc_sys_read(max10, M10BMC_MAC_LOW, &macaddr_low);
94 if (ret)
95 return ret;
96
97 ret = m10bmc_sys_read(max10, M10BMC_MAC_HIGH, &macaddr_high);
98 if (ret)
99 return ret;
100
101 return sysfs_emit(buf, "%02x:%02x:%02x:%02x:%02x:%02x\n",
102 (u8)FIELD_GET(M10BMC_MAC_BYTE1, macaddr_low),
103 (u8)FIELD_GET(M10BMC_MAC_BYTE2, macaddr_low),
104 (u8)FIELD_GET(M10BMC_MAC_BYTE3, macaddr_low),
105 (u8)FIELD_GET(M10BMC_MAC_BYTE4, macaddr_low),
106 (u8)FIELD_GET(M10BMC_MAC_BYTE5, macaddr_high),
107 (u8)FIELD_GET(M10BMC_MAC_BYTE6, macaddr_high));
108}
109static DEVICE_ATTR_RO(mac_address);
110
111static ssize_t mac_count_show(struct device *dev,
112 struct device_attribute *attr, char *buf)
113{
114 struct intel_m10bmc *max10 = dev_get_drvdata(dev);
115 unsigned int macaddr_high;
116 int ret;
117
118 ret = m10bmc_sys_read(max10, M10BMC_MAC_HIGH, &macaddr_high);
119 if (ret)
120 return ret;
121
122 return sysfs_emit(buf, "%u\n",
123 (u8)FIELD_GET(M10BMC_MAC_COUNT, macaddr_high));
124}
125static DEVICE_ATTR_RO(mac_count);
126
127static struct attribute *m10bmc_attrs[] = {
128 &dev_attr_bmc_version.attr,
129 &dev_attr_bmcfw_version.attr,
130 &dev_attr_mac_address.attr,
131 &dev_attr_mac_count.attr,
132 NULL,
133};
134ATTRIBUTE_GROUPS(m10bmc);
135
136static int check_m10bmc_version(struct intel_m10bmc *ddata)
137{
138 unsigned int v;
139 int ret;
140
141
142
143
144
145
146
147
148
149 ret = m10bmc_raw_read(ddata, M10BMC_LEGACY_BUILD_VER, &v);
150 if (ret)
151 return -ENODEV;
152
153 if (v != M10BMC_VER_LEGACY_INVALID) {
154 dev_err(ddata->dev, "bad version M10BMC detected\n");
155 return -ENODEV;
156 }
157
158 return 0;
159}
160
161static int intel_m10_bmc_spi_probe(struct spi_device *spi)
162{
163 const struct spi_device_id *id = spi_get_device_id(spi);
164 struct device *dev = &spi->dev;
165 struct mfd_cell *cells;
166 struct intel_m10bmc *ddata;
167 int ret, n_cell;
168
169 ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL);
170 if (!ddata)
171 return -ENOMEM;
172
173 ddata->dev = dev;
174
175 ddata->regmap =
176 devm_regmap_init_spi_avmm(spi, &intel_m10bmc_regmap_config);
177 if (IS_ERR(ddata->regmap)) {
178 ret = PTR_ERR(ddata->regmap);
179 dev_err(dev, "Failed to allocate regmap: %d\n", ret);
180 return ret;
181 }
182
183 spi_set_drvdata(spi, ddata);
184
185 ret = check_m10bmc_version(ddata);
186 if (ret) {
187 dev_err(dev, "Failed to identify m10bmc hardware\n");
188 return ret;
189 }
190
191 switch (id->driver_data) {
192 case M10_N3000:
193 cells = m10bmc_pacn3000_subdevs;
194 n_cell = ARRAY_SIZE(m10bmc_pacn3000_subdevs);
195 break;
196 case M10_D5005:
197 cells = m10bmc_d5005_subdevs;
198 n_cell = ARRAY_SIZE(m10bmc_d5005_subdevs);
199 break;
200 case M10_N5010:
201 cells = m10bmc_n5010_subdevs;
202 n_cell = ARRAY_SIZE(m10bmc_n5010_subdevs);
203 break;
204 default:
205 return -ENODEV;
206 }
207
208 ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO, cells, n_cell,
209 NULL, 0, NULL);
210 if (ret)
211 dev_err(dev, "Failed to register sub-devices: %d\n", ret);
212
213 return ret;
214}
215
216static const struct spi_device_id m10bmc_spi_id[] = {
217 { "m10-n3000", M10_N3000 },
218 { "m10-d5005", M10_D5005 },
219 { "m10-n5010", M10_N5010 },
220 { }
221};
222MODULE_DEVICE_TABLE(spi, m10bmc_spi_id);
223
224static struct spi_driver intel_m10bmc_spi_driver = {
225 .driver = {
226 .name = "intel-m10-bmc",
227 .dev_groups = m10bmc_groups,
228 },
229 .probe = intel_m10_bmc_spi_probe,
230 .id_table = m10bmc_spi_id,
231};
232module_spi_driver(intel_m10bmc_spi_driver);
233
234MODULE_DESCRIPTION("Intel MAX 10 BMC Device Driver");
235MODULE_AUTHOR("Intel Corporation");
236MODULE_LICENSE("GPL v2");
237MODULE_ALIAS("spi:intel-m10-bmc");
238
