1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Nvidia sn2201 driver
4 *
5 * Copyright (C) 2022 Nvidia Technologies Ltd.
6 */
7
8 #include <linux/device.h>
9 #include <linux/i2c.h>
10 #include <linux/interrupt.h>
11 #include <linux/irq.h>
12 #include <linux/gpio.h>
13 #include <linux/module.h>
14 #include <linux/platform_data/mlxcpld.h>
15 #include <linux/platform_data/mlxreg.h>
16 #include <linux/platform_device.h>
17 #include <linux/regmap.h>
18
19 /* SN2201 CPLD register offset. */
20 #define NVSW_SN2201_CPLD_LPC_I2C_BASE_ADRR 0x2000
21 #define NVSW_SN2201_CPLD_LPC_IO_RANGE 0x100
22 #define NVSW_SN2201_HW_VER_ID_OFFSET 0x00
23 #define NVSW_SN2201_BOARD_ID_OFFSET 0x01
24 #define NVSW_SN2201_CPLD_VER_OFFSET 0x02
25 #define NVSW_SN2201_CPLD_MVER_OFFSET 0x03
26 #define NVSW_SN2201_CPLD_ID_OFFSET 0x04
27 #define NVSW_SN2201_CPLD_PN_OFFSET 0x05
28 #define NVSW_SN2201_CPLD_PN1_OFFSET 0x06
29 #define NVSW_SN2201_PSU_CTRL_OFFSET 0x0a
30 #define NVSW_SN2201_QSFP28_STATUS_OFFSET 0x0b
31 #define NVSW_SN2201_QSFP28_INT_STATUS_OFFSET 0x0c
32 #define NVSW_SN2201_QSFP28_LP_STATUS_OFFSET 0x0d
33 #define NVSW_SN2201_QSFP28_RST_STATUS_OFFSET 0x0e
34 #define NVSW_SN2201_SYS_STATUS_OFFSET 0x0f
35 #define NVSW_SN2201_FRONT_SYS_LED_CTRL_OFFSET 0x10
36 #define NVSW_SN2201_FRONT_PSU_LED_CTRL_OFFSET 0x12
37 #define NVSW_SN2201_FRONT_UID_LED_CTRL_OFFSET 0x13
38 #define NVSW_SN2201_QSFP28_LED_TEST_STATUS_OFFSET 0x14
39 #define NVSW_SN2201_SYS_RST_STATUS_OFFSET 0x15
40 #define NVSW_SN2201_SYS_INT_STATUS_OFFSET 0x21
41 #define NVSW_SN2201_SYS_INT_MASK_OFFSET 0x22
42 #define NVSW_SN2201_ASIC_STATUS_OFFSET 0x24
43 #define NVSW_SN2201_ASIC_EVENT_OFFSET 0x25
44 #define NVSW_SN2201_ASIC_MAKS_OFFSET 0x26
45 #define NVSW_SN2201_THML_STATUS_OFFSET 0x27
46 #define NVSW_SN2201_THML_EVENT_OFFSET 0x28
47 #define NVSW_SN2201_THML_MASK_OFFSET 0x29
48 #define NVSW_SN2201_PS_ALT_STATUS_OFFSET 0x2a
49 #define NVSW_SN2201_PS_ALT_EVENT_OFFSET 0x2b
50 #define NVSW_SN2201_PS_ALT_MASK_OFFSET 0x2c
51 #define NVSW_SN2201_PS_PRSNT_STATUS_OFFSET 0x30
52 #define NVSW_SN2201_PS_PRSNT_EVENT_OFFSET 0x31
53 #define NVSW_SN2201_PS_PRSNT_MASK_OFFSET 0x32
54 #define NVSW_SN2201_PS_DC_OK_STATUS_OFFSET 0x33
55 #define NVSW_SN2201_PS_DC_OK_EVENT_OFFSET 0x34
56 #define NVSW_SN2201_PS_DC_OK_MASK_OFFSET 0x35
57 #define NVSW_SN2201_RST_CAUSE1_OFFSET 0x36
58 #define NVSW_SN2201_RST_CAUSE2_OFFSET 0x37
59 #define NVSW_SN2201_RST_SW_CTRL_OFFSET 0x38
60 #define NVSW_SN2201_FAN_PRSNT_STATUS_OFFSET 0x3a
61 #define NVSW_SN2201_FAN_PRSNT_EVENT_OFFSET 0x3b
62 #define NVSW_SN2201_FAN_PRSNT_MASK_OFFSET 0x3c
63 #define NVSW_SN2201_WD_TMR_OFFSET_LSB 0x40
64 #define NVSW_SN2201_WD_TMR_OFFSET_MSB 0x41
65 #define NVSW_SN2201_WD_ACT_OFFSET 0x42
66 #define NVSW_SN2201_FAN_LED1_CTRL_OFFSET 0x50
67 #define NVSW_SN2201_FAN_LED2_CTRL_OFFSET 0x51
68 #define NVSW_SN2201_REG_MAX 0x52
69
70 /* Number of physical I2C busses. */
71 #define NVSW_SN2201_PHY_I2C_BUS_NUM 2
72 /* Number of main mux channels. */
73 #define NVSW_SN2201_MAIN_MUX_CHNL_NUM 8
74
75 #define NVSW_SN2201_MAIN_NR 0
76 #define NVSW_SN2201_MAIN_MUX_NR 1
77 #define NVSW_SN2201_MAIN_MUX_DEFER_NR (NVSW_SN2201_PHY_I2C_BUS_NUM + \
78 NVSW_SN2201_MAIN_MUX_CHNL_NUM - 1)
79
80 #define NVSW_SN2201_MAIN_MUX_CH0_NR NVSW_SN2201_PHY_I2C_BUS_NUM
81 #define NVSW_SN2201_MAIN_MUX_CH1_NR (NVSW_SN2201_MAIN_MUX_CH0_NR + 1)
82 #define NVSW_SN2201_MAIN_MUX_CH2_NR (NVSW_SN2201_MAIN_MUX_CH0_NR + 2)
83 #define NVSW_SN2201_MAIN_MUX_CH3_NR (NVSW_SN2201_MAIN_MUX_CH0_NR + 3)
84 #define NVSW_SN2201_MAIN_MUX_CH5_NR (NVSW_SN2201_MAIN_MUX_CH0_NR + 5)
85 #define NVSW_SN2201_MAIN_MUX_CH6_NR (NVSW_SN2201_MAIN_MUX_CH0_NR + 6)
86 #define NVSW_SN2201_MAIN_MUX_CH7_NR (NVSW_SN2201_MAIN_MUX_CH0_NR + 7)
87 #define NVSW_SN2201_2ND_MUX_CH0_NR (NVSW_SN2201_MAIN_MUX_CH7_NR + 1)
88 #define NVSW_SN2201_2ND_MUX_CH1_NR (NVSW_SN2201_MAIN_MUX_CH7_NR + 2)
89 #define NVSW_SN2201_2ND_MUX_CH2_NR (NVSW_SN2201_MAIN_MUX_CH7_NR + 3)
90 #define NVSW_SN2201_2ND_MUX_CH3_NR (NVSW_SN2201_MAIN_MUX_CH7_NR + 4)
91
92 #define NVSW_SN2201_CPLD_NR NVSW_SN2201_MAIN_MUX_CH0_NR
93 #define NVSW_SN2201_NR_NONE -1
94
95 /* Masks for aggregation, PSU presence and power, ASIC events
96 * in CPLD related registers.
97 */
98 #define NVSW_SN2201_CPLD_AGGR_ASIC_MASK_DEF 0xe0
99 #define NVSW_SN2201_CPLD_AGGR_PSU_MASK_DEF 0x04
100 #define NVSW_SN2201_CPLD_AGGR_PWR_MASK_DEF 0x02
101 #define NVSW_SN2201_CPLD_AGGR_FAN_MASK_DEF 0x10
102 #define NVSW_SN2201_CPLD_AGGR_MASK_DEF \
103 (NVSW_SN2201_CPLD_AGGR_ASIC_MASK_DEF \
104 | NVSW_SN2201_CPLD_AGGR_PSU_MASK_DEF \
105 | NVSW_SN2201_CPLD_AGGR_PWR_MASK_DEF \
106 | NVSW_SN2201_CPLD_AGGR_FAN_MASK_DEF)
107
108 #define NVSW_SN2201_CPLD_ASIC_MASK GENMASK(3, 1)
109 #define NVSW_SN2201_CPLD_PSU_MASK GENMASK(1, 0)
110 #define NVSW_SN2201_CPLD_PWR_MASK GENMASK(1, 0)
111 #define NVSW_SN2201_CPLD_FAN_MASK GENMASK(3, 0)
112
113 #define NVSW_SN2201_CPLD_SYSIRQ 26
114 #define NVSW_SN2201_LPC_SYSIRQ 28
115 #define NVSW_SN2201_CPLD_I2CADDR 0x41
116
117 #define NVSW_SN2201_WD_DFLT_TIMEOUT 600
118
119 /* nvsw_sn2201 - device private data
120 * @dev: platform device;
121 * @io_data: register access platform data;
122 * @led_data: LED platform data;
123 * @hotplug_data: hotplug platform data;
124 * @i2c_data: I2C controller platform data;
125 * @led: LED device;
126 * @io_regs: register access device;
127 * @pdev_hotplug: hotplug device;
128 * @sn2201_devs: I2C devices for sn2201 devices;
129 * @sn2201_devs_num: number of I2C devices for sn2201 device;
130 * @main_mux_devs: I2C devices for main mux;
131 * @main_mux_devs_num: number of I2C devices for main mux;
132 * @cpld_devs: I2C devices for cpld;
133 * @cpld_devs_num: number of I2C devices for cpld;
134 * @main_mux_deferred_nr: I2C adapter number must be exist prior creating devices execution;
135 */
136 struct nvsw_sn2201 {
137 struct device *dev;
138 struct mlxreg_core_platform_data *io_data;
139 struct mlxreg_core_platform_data *led_data;
140 struct mlxreg_core_platform_data *wd_data;
141 struct mlxreg_core_hotplug_platform_data *hotplug_data;
142 struct mlxreg_core_hotplug_platform_data *i2c_data;
143 struct platform_device *led;
144 struct platform_device *wd;
145 struct platform_device *io_regs;
146 struct platform_device *pdev_hotplug;
147 struct platform_device *pdev_i2c;
148 struct mlxreg_hotplug_device *sn2201_devs;
149 int sn2201_devs_num;
150 struct mlxreg_hotplug_device *main_mux_devs;
151 int main_mux_devs_num;
152 struct mlxreg_hotplug_device *cpld_devs;
153 int cpld_devs_num;
154 int main_mux_deferred_nr;
155 };
156
nvsw_sn2201_writeable_reg(struct device * dev,unsigned int reg)157 static bool nvsw_sn2201_writeable_reg(struct device *dev, unsigned int reg)
158 {
159 switch (reg) {
160 case NVSW_SN2201_PSU_CTRL_OFFSET:
161 case NVSW_SN2201_QSFP28_LP_STATUS_OFFSET:
162 case NVSW_SN2201_QSFP28_RST_STATUS_OFFSET:
163 case NVSW_SN2201_FRONT_SYS_LED_CTRL_OFFSET:
164 case NVSW_SN2201_FRONT_PSU_LED_CTRL_OFFSET:
165 case NVSW_SN2201_FRONT_UID_LED_CTRL_OFFSET:
166 case NVSW_SN2201_QSFP28_LED_TEST_STATUS_OFFSET:
167 case NVSW_SN2201_SYS_RST_STATUS_OFFSET:
168 case NVSW_SN2201_SYS_INT_MASK_OFFSET:
169 case NVSW_SN2201_ASIC_EVENT_OFFSET:
170 case NVSW_SN2201_ASIC_MAKS_OFFSET:
171 case NVSW_SN2201_THML_EVENT_OFFSET:
172 case NVSW_SN2201_THML_MASK_OFFSET:
173 case NVSW_SN2201_PS_ALT_EVENT_OFFSET:
174 case NVSW_SN2201_PS_ALT_MASK_OFFSET:
175 case NVSW_SN2201_PS_PRSNT_EVENT_OFFSET:
176 case NVSW_SN2201_PS_PRSNT_MASK_OFFSET:
177 case NVSW_SN2201_PS_DC_OK_EVENT_OFFSET:
178 case NVSW_SN2201_PS_DC_OK_MASK_OFFSET:
179 case NVSW_SN2201_RST_SW_CTRL_OFFSET:
180 case NVSW_SN2201_FAN_PRSNT_EVENT_OFFSET:
181 case NVSW_SN2201_FAN_PRSNT_MASK_OFFSET:
182 case NVSW_SN2201_WD_TMR_OFFSET_LSB:
183 case NVSW_SN2201_WD_TMR_OFFSET_MSB:
184 case NVSW_SN2201_WD_ACT_OFFSET:
185 case NVSW_SN2201_FAN_LED1_CTRL_OFFSET:
186 case NVSW_SN2201_FAN_LED2_CTRL_OFFSET:
187 return true;
188 }
189 return false;
190 }
191
nvsw_sn2201_readable_reg(struct device * dev,unsigned int reg)192 static bool nvsw_sn2201_readable_reg(struct device *dev, unsigned int reg)
193 {
194 switch (reg) {
195 case NVSW_SN2201_HW_VER_ID_OFFSET:
196 case NVSW_SN2201_BOARD_ID_OFFSET:
197 case NVSW_SN2201_CPLD_VER_OFFSET:
198 case NVSW_SN2201_CPLD_MVER_OFFSET:
199 case NVSW_SN2201_CPLD_ID_OFFSET:
200 case NVSW_SN2201_CPLD_PN_OFFSET:
201 case NVSW_SN2201_CPLD_PN1_OFFSET:
202 case NVSW_SN2201_PSU_CTRL_OFFSET:
203 case NVSW_SN2201_QSFP28_STATUS_OFFSET:
204 case NVSW_SN2201_QSFP28_INT_STATUS_OFFSET:
205 case NVSW_SN2201_QSFP28_LP_STATUS_OFFSET:
206 case NVSW_SN2201_QSFP28_RST_STATUS_OFFSET:
207 case NVSW_SN2201_SYS_STATUS_OFFSET:
208 case NVSW_SN2201_FRONT_SYS_LED_CTRL_OFFSET:
209 case NVSW_SN2201_FRONT_PSU_LED_CTRL_OFFSET:
210 case NVSW_SN2201_FRONT_UID_LED_CTRL_OFFSET:
211 case NVSW_SN2201_QSFP28_LED_TEST_STATUS_OFFSET:
212 case NVSW_SN2201_SYS_RST_STATUS_OFFSET:
213 case NVSW_SN2201_RST_CAUSE1_OFFSET:
214 case NVSW_SN2201_RST_CAUSE2_OFFSET:
215 case NVSW_SN2201_SYS_INT_STATUS_OFFSET:
216 case NVSW_SN2201_SYS_INT_MASK_OFFSET:
217 case NVSW_SN2201_ASIC_STATUS_OFFSET:
218 case NVSW_SN2201_ASIC_EVENT_OFFSET:
219 case NVSW_SN2201_ASIC_MAKS_OFFSET:
220 case NVSW_SN2201_THML_STATUS_OFFSET:
221 case NVSW_SN2201_THML_EVENT_OFFSET:
222 case NVSW_SN2201_THML_MASK_OFFSET:
223 case NVSW_SN2201_PS_ALT_STATUS_OFFSET:
224 case NVSW_SN2201_PS_ALT_EVENT_OFFSET:
225 case NVSW_SN2201_PS_ALT_MASK_OFFSET:
226 case NVSW_SN2201_PS_PRSNT_STATUS_OFFSET:
227 case NVSW_SN2201_PS_PRSNT_EVENT_OFFSET:
228 case NVSW_SN2201_PS_PRSNT_MASK_OFFSET:
229 case NVSW_SN2201_PS_DC_OK_STATUS_OFFSET:
230 case NVSW_SN2201_PS_DC_OK_EVENT_OFFSET:
231 case NVSW_SN2201_PS_DC_OK_MASK_OFFSET:
232 case NVSW_SN2201_RST_SW_CTRL_OFFSET:
233 case NVSW_SN2201_FAN_PRSNT_STATUS_OFFSET:
234 case NVSW_SN2201_FAN_PRSNT_EVENT_OFFSET:
235 case NVSW_SN2201_FAN_PRSNT_MASK_OFFSET:
236 case NVSW_SN2201_WD_TMR_OFFSET_LSB:
237 case NVSW_SN2201_WD_TMR_OFFSET_MSB:
238 case NVSW_SN2201_WD_ACT_OFFSET:
239 case NVSW_SN2201_FAN_LED1_CTRL_OFFSET:
240 case NVSW_SN2201_FAN_LED2_CTRL_OFFSET:
241 return true;
242 }
243 return false;
244 }
245
nvsw_sn2201_volatile_reg(struct device * dev,unsigned int reg)246 static bool nvsw_sn2201_volatile_reg(struct device *dev, unsigned int reg)
247 {
248 switch (reg) {
249 case NVSW_SN2201_HW_VER_ID_OFFSET:
250 case NVSW_SN2201_BOARD_ID_OFFSET:
251 case NVSW_SN2201_CPLD_VER_OFFSET:
252 case NVSW_SN2201_CPLD_MVER_OFFSET:
253 case NVSW_SN2201_CPLD_ID_OFFSET:
254 case NVSW_SN2201_CPLD_PN_OFFSET:
255 case NVSW_SN2201_CPLD_PN1_OFFSET:
256 case NVSW_SN2201_PSU_CTRL_OFFSET:
257 case NVSW_SN2201_QSFP28_STATUS_OFFSET:
258 case NVSW_SN2201_QSFP28_INT_STATUS_OFFSET:
259 case NVSW_SN2201_QSFP28_LP_STATUS_OFFSET:
260 case NVSW_SN2201_QSFP28_RST_STATUS_OFFSET:
261 case NVSW_SN2201_SYS_STATUS_OFFSET:
262 case NVSW_SN2201_FRONT_SYS_LED_CTRL_OFFSET:
263 case NVSW_SN2201_FRONT_PSU_LED_CTRL_OFFSET:
264 case NVSW_SN2201_FRONT_UID_LED_CTRL_OFFSET:
265 case NVSW_SN2201_QSFP28_LED_TEST_STATUS_OFFSET:
266 case NVSW_SN2201_SYS_RST_STATUS_OFFSET:
267 case NVSW_SN2201_RST_CAUSE1_OFFSET:
268 case NVSW_SN2201_RST_CAUSE2_OFFSET:
269 case NVSW_SN2201_SYS_INT_STATUS_OFFSET:
270 case NVSW_SN2201_SYS_INT_MASK_OFFSET:
271 case NVSW_SN2201_ASIC_STATUS_OFFSET:
272 case NVSW_SN2201_ASIC_EVENT_OFFSET:
273 case NVSW_SN2201_ASIC_MAKS_OFFSET:
274 case NVSW_SN2201_THML_STATUS_OFFSET:
275 case NVSW_SN2201_THML_EVENT_OFFSET:
276 case NVSW_SN2201_THML_MASK_OFFSET:
277 case NVSW_SN2201_PS_ALT_STATUS_OFFSET:
278 case NVSW_SN2201_PS_ALT_EVENT_OFFSET:
279 case NVSW_SN2201_PS_ALT_MASK_OFFSET:
280 case NVSW_SN2201_PS_PRSNT_STATUS_OFFSET:
281 case NVSW_SN2201_PS_PRSNT_EVENT_OFFSET:
282 case NVSW_SN2201_PS_PRSNT_MASK_OFFSET:
283 case NVSW_SN2201_PS_DC_OK_STATUS_OFFSET:
284 case NVSW_SN2201_PS_DC_OK_EVENT_OFFSET:
285 case NVSW_SN2201_PS_DC_OK_MASK_OFFSET:
286 case NVSW_SN2201_RST_SW_CTRL_OFFSET:
287 case NVSW_SN2201_FAN_PRSNT_STATUS_OFFSET:
288 case NVSW_SN2201_FAN_PRSNT_EVENT_OFFSET:
289 case NVSW_SN2201_FAN_PRSNT_MASK_OFFSET:
290 case NVSW_SN2201_WD_TMR_OFFSET_LSB:
291 case NVSW_SN2201_WD_TMR_OFFSET_MSB:
292 case NVSW_SN2201_FAN_LED1_CTRL_OFFSET:
293 case NVSW_SN2201_FAN_LED2_CTRL_OFFSET:
294 return true;
295 }
296 return false;
297 }
298
299 static const struct reg_default nvsw_sn2201_regmap_default[] = {
300 { NVSW_SN2201_QSFP28_LED_TEST_STATUS_OFFSET, 0x00 },
301 { NVSW_SN2201_WD_ACT_OFFSET, 0x00 },
302 };
303
304 /* Configuration for the register map of a device with 1 bytes address space. */
305 static const struct regmap_config nvsw_sn2201_regmap_conf = {
306 .reg_bits = 8,
307 .val_bits = 8,
308 .max_register = NVSW_SN2201_REG_MAX,
309 .cache_type = REGCACHE_FLAT,
310 .writeable_reg = nvsw_sn2201_writeable_reg,
311 .readable_reg = nvsw_sn2201_readable_reg,
312 .volatile_reg = nvsw_sn2201_volatile_reg,
313 .reg_defaults = nvsw_sn2201_regmap_default,
314 .num_reg_defaults = ARRAY_SIZE(nvsw_sn2201_regmap_default),
315 };
316
317 /* Regions for LPC I2C controller and LPC base register space. */
318 static const struct resource nvsw_sn2201_lpc_io_resources[] = {
319 [0] = DEFINE_RES_NAMED(NVSW_SN2201_CPLD_LPC_I2C_BASE_ADRR,
320 NVSW_SN2201_CPLD_LPC_IO_RANGE,
321 "mlxplat_cpld_lpc_i2c_ctrl", IORESOURCE_IO),
322 };
323
324 static struct resource nvsw_sn2201_cpld_res[] = {
325 [0] = DEFINE_RES_IRQ_NAMED(NVSW_SN2201_CPLD_SYSIRQ, "mlxreg-hotplug"),
326 };
327
328 static struct resource nvsw_sn2201_lpc_res[] = {
329 [0] = DEFINE_RES_IRQ_NAMED(NVSW_SN2201_LPC_SYSIRQ, "i2c-mlxcpld"),
330 };
331
332 /* SN2201 I2C platform data. */
333 static struct mlxreg_core_hotplug_platform_data nvsw_sn2201_i2c_data = {
334 .irq = NVSW_SN2201_CPLD_SYSIRQ,
335 };
336
337 /* SN2201 CPLD device. */
338 static struct i2c_board_info nvsw_sn2201_cpld_devices[] = {
339 {
340 I2C_BOARD_INFO("nvsw-sn2201", 0x41),
341 },
342 };
343
344 /* SN2201 CPLD board info. */
345 static struct mlxreg_hotplug_device nvsw_sn2201_cpld_brdinfo[] = {
346 {
347 .brdinfo = &nvsw_sn2201_cpld_devices[0],
348 .nr = NVSW_SN2201_CPLD_NR,
349 },
350 };
351
352 /* SN2201 main mux device. */
353 static struct i2c_board_info nvsw_sn2201_main_mux_devices[] = {
354 {
355 I2C_BOARD_INFO("pca9548", 0x70),
356 },
357 };
358
359 /* SN2201 main mux board info. */
360 static struct mlxreg_hotplug_device nvsw_sn2201_main_mux_brdinfo[] = {
361 {
362 .brdinfo = &nvsw_sn2201_main_mux_devices[0],
363 .nr = NVSW_SN2201_MAIN_MUX_NR,
364 },
365 };
366
367 /* SN2201 power devices. */
368 static struct i2c_board_info nvsw_sn2201_pwr_devices[] = {
369 {
370 I2C_BOARD_INFO("pmbus", 0x58),
371 },
372 {
373 I2C_BOARD_INFO("pmbus", 0x58),
374 },
375 };
376
377 /* SN2201 fan devices. */
378 static struct i2c_board_info nvsw_sn2201_fan_devices[] = {
379 {
380 I2C_BOARD_INFO("24c02", 0x50),
381 },
382 {
383 I2C_BOARD_INFO("24c02", 0x51),
384 },
385 {
386 I2C_BOARD_INFO("24c02", 0x52),
387 },
388 {
389 I2C_BOARD_INFO("24c02", 0x53),
390 },
391 };
392
393 /* SN2201 hotplug default data. */
394 static struct mlxreg_core_data nvsw_sn2201_psu_items_data[] = {
395 {
396 .label = "psu1",
397 .reg = NVSW_SN2201_PS_PRSNT_STATUS_OFFSET,
398 .mask = BIT(0),
399 .hpdev.nr = NVSW_SN2201_NR_NONE,
400 },
401 {
402 .label = "psu2",
403 .reg = NVSW_SN2201_PS_PRSNT_STATUS_OFFSET,
404 .mask = BIT(1),
405 .hpdev.nr = NVSW_SN2201_NR_NONE,
406 },
407 };
408
409 static struct mlxreg_core_data nvsw_sn2201_pwr_items_data[] = {
410 {
411 .label = "pwr1",
412 .reg = NVSW_SN2201_PS_DC_OK_STATUS_OFFSET,
413 .mask = BIT(0),
414 .hpdev.brdinfo = &nvsw_sn2201_pwr_devices[0],
415 .hpdev.nr = NVSW_SN2201_MAIN_MUX_CH1_NR,
416 },
417 {
418 .label = "pwr2",
419 .reg = NVSW_SN2201_PS_DC_OK_STATUS_OFFSET,
420 .mask = BIT(1),
421 .hpdev.brdinfo = &nvsw_sn2201_pwr_devices[1],
422 .hpdev.nr = NVSW_SN2201_MAIN_MUX_CH2_NR,
423 },
424 };
425
426 static struct mlxreg_core_data nvsw_sn2201_fan_items_data[] = {
427 {
428 .label = "fan1",
429 .reg = NVSW_SN2201_FAN_PRSNT_STATUS_OFFSET,
430 .mask = BIT(0),
431 .hpdev.brdinfo = &nvsw_sn2201_fan_devices[0],
432 .hpdev.nr = NVSW_SN2201_2ND_MUX_CH0_NR,
433 },
434 {
435 .label = "fan2",
436 .reg = NVSW_SN2201_FAN_PRSNT_STATUS_OFFSET,
437 .mask = BIT(1),
438 .hpdev.brdinfo = &nvsw_sn2201_fan_devices[1],
439 .hpdev.nr = NVSW_SN2201_2ND_MUX_CH1_NR,
440 },
441 {
442 .label = "fan3",
443 .reg = NVSW_SN2201_FAN_PRSNT_STATUS_OFFSET,
444 .mask = BIT(2),
445 .hpdev.brdinfo = &nvsw_sn2201_fan_devices[2],
446 .hpdev.nr = NVSW_SN2201_2ND_MUX_CH2_NR,
447 },
448 {
449 .label = "fan4",
450 .reg = NVSW_SN2201_FAN_PRSNT_STATUS_OFFSET,
451 .mask = BIT(3),
452 .hpdev.brdinfo = &nvsw_sn2201_fan_devices[3],
453 .hpdev.nr = NVSW_SN2201_2ND_MUX_CH3_NR,
454 },
455 };
456
457 static struct mlxreg_core_data nvsw_sn2201_sys_items_data[] = {
458 {
459 .label = "nic_smb_alert",
460 .reg = NVSW_SN2201_ASIC_STATUS_OFFSET,
461 .mask = BIT(1),
462 .hpdev.nr = NVSW_SN2201_NR_NONE,
463 },
464 {
465 .label = "cpu_sd",
466 .reg = NVSW_SN2201_ASIC_STATUS_OFFSET,
467 .mask = BIT(2),
468 .hpdev.nr = NVSW_SN2201_NR_NONE,
469 },
470 {
471 .label = "mac_health",
472 .reg = NVSW_SN2201_ASIC_STATUS_OFFSET,
473 .mask = BIT(3),
474 .hpdev.nr = NVSW_SN2201_NR_NONE,
475 },
476 };
477
478 static struct mlxreg_core_item nvsw_sn2201_items[] = {
479 {
480 .data = nvsw_sn2201_psu_items_data,
481 .aggr_mask = NVSW_SN2201_CPLD_AGGR_PSU_MASK_DEF,
482 .reg = NVSW_SN2201_PS_PRSNT_STATUS_OFFSET,
483 .mask = NVSW_SN2201_CPLD_PSU_MASK,
484 .count = ARRAY_SIZE(nvsw_sn2201_psu_items_data),
485 .inversed = 1,
486 .health = false,
487 },
488 {
489 .data = nvsw_sn2201_pwr_items_data,
490 .aggr_mask = NVSW_SN2201_CPLD_AGGR_PWR_MASK_DEF,
491 .reg = NVSW_SN2201_PS_DC_OK_STATUS_OFFSET,
492 .mask = NVSW_SN2201_CPLD_PWR_MASK,
493 .count = ARRAY_SIZE(nvsw_sn2201_pwr_items_data),
494 .inversed = 0,
495 .health = false,
496 },
497 {
498 .data = nvsw_sn2201_fan_items_data,
499 .aggr_mask = NVSW_SN2201_CPLD_AGGR_FAN_MASK_DEF,
500 .reg = NVSW_SN2201_FAN_PRSNT_STATUS_OFFSET,
501 .mask = NVSW_SN2201_CPLD_FAN_MASK,
502 .count = ARRAY_SIZE(nvsw_sn2201_fan_items_data),
503 .inversed = 1,
504 .health = false,
505 },
506 {
507 .data = nvsw_sn2201_sys_items_data,
508 .aggr_mask = NVSW_SN2201_CPLD_AGGR_ASIC_MASK_DEF,
509 .reg = NVSW_SN2201_ASIC_STATUS_OFFSET,
510 .mask = NVSW_SN2201_CPLD_ASIC_MASK,
511 .count = ARRAY_SIZE(nvsw_sn2201_sys_items_data),
512 .inversed = 1,
513 .health = false,
514 },
515 };
516
517 static
518 struct mlxreg_core_hotplug_platform_data nvsw_sn2201_hotplug = {
519 .items = nvsw_sn2201_items,
520 .counter = ARRAY_SIZE(nvsw_sn2201_items),
521 .cell = NVSW_SN2201_SYS_INT_STATUS_OFFSET,
522 .mask = NVSW_SN2201_CPLD_AGGR_MASK_DEF,
523 };
524
525 /* SN2201 static devices. */
526 static struct i2c_board_info nvsw_sn2201_static_devices[] = {
527 {
528 I2C_BOARD_INFO("24c02", 0x57),
529 },
530 {
531 I2C_BOARD_INFO("lm75", 0x4b),
532 },
533 {
534 I2C_BOARD_INFO("24c64", 0x56),
535 },
536 {
537 I2C_BOARD_INFO("ads1015", 0x49),
538 },
539 {
540 I2C_BOARD_INFO("pca9546", 0x71),
541 },
542 {
543 I2C_BOARD_INFO("emc2305", 0x4d),
544 },
545 {
546 I2C_BOARD_INFO("lm75", 0x49),
547 },
548 {
549 I2C_BOARD_INFO("pca9555", 0x27),
550 },
551 {
552 I2C_BOARD_INFO("powr1014", 0x37),
553 },
554 {
555 I2C_BOARD_INFO("lm75", 0x4f),
556 },
557 {
558 I2C_BOARD_INFO("pmbus", 0x40),
559 },
560 };
561
562 /* SN2201 default static board info. */
563 static struct mlxreg_hotplug_device nvsw_sn2201_static_brdinfo[] = {
564 {
565 .brdinfo = &nvsw_sn2201_static_devices[0],
566 .nr = NVSW_SN2201_MAIN_NR,
567 },
568 {
569 .brdinfo = &nvsw_sn2201_static_devices[1],
570 .nr = NVSW_SN2201_MAIN_MUX_CH0_NR,
571 },
572 {
573 .brdinfo = &nvsw_sn2201_static_devices[2],
574 .nr = NVSW_SN2201_MAIN_MUX_CH0_NR,
575 },
576 {
577 .brdinfo = &nvsw_sn2201_static_devices[3],
578 .nr = NVSW_SN2201_MAIN_MUX_CH0_NR,
579 },
580 {
581 .brdinfo = &nvsw_sn2201_static_devices[4],
582 .nr = NVSW_SN2201_MAIN_MUX_CH3_NR,
583 },
584 {
585 .brdinfo = &nvsw_sn2201_static_devices[5],
586 .nr = NVSW_SN2201_MAIN_MUX_CH5_NR,
587 },
588 {
589 .brdinfo = &nvsw_sn2201_static_devices[6],
590 .nr = NVSW_SN2201_MAIN_MUX_CH5_NR,
591 },
592 {
593 .brdinfo = &nvsw_sn2201_static_devices[7],
594 .nr = NVSW_SN2201_MAIN_MUX_CH5_NR,
595 },
596 {
597 .brdinfo = &nvsw_sn2201_static_devices[8],
598 .nr = NVSW_SN2201_MAIN_MUX_CH6_NR,
599 },
600 {
601 .brdinfo = &nvsw_sn2201_static_devices[9],
602 .nr = NVSW_SN2201_MAIN_MUX_CH6_NR,
603 },
604 {
605 .brdinfo = &nvsw_sn2201_static_devices[10],
606 .nr = NVSW_SN2201_MAIN_MUX_CH7_NR,
607 },
608 };
609
610 /* LED default data. */
611 static struct mlxreg_core_data nvsw_sn2201_led_data[] = {
612 {
613 .label = "status:green",
614 .reg = NVSW_SN2201_FRONT_SYS_LED_CTRL_OFFSET,
615 .mask = GENMASK(7, 4),
616 },
617 {
618 .label = "status:orange",
619 .reg = NVSW_SN2201_FRONT_SYS_LED_CTRL_OFFSET,
620 .mask = GENMASK(7, 4),
621 },
622 {
623 .label = "psu:green",
624 .reg = NVSW_SN2201_FRONT_PSU_LED_CTRL_OFFSET,
625 .mask = GENMASK(7, 4),
626 },
627 {
628 .label = "psu:orange",
629 .reg = NVSW_SN2201_FRONT_PSU_LED_CTRL_OFFSET,
630 .mask = GENMASK(7, 4),
631 },
632 {
633 .label = "uid:blue",
634 .reg = NVSW_SN2201_FRONT_UID_LED_CTRL_OFFSET,
635 .mask = GENMASK(7, 4),
636 },
637 {
638 .label = "fan1:green",
639 .reg = NVSW_SN2201_FAN_LED1_CTRL_OFFSET,
640 .mask = GENMASK(7, 4),
641 },
642 {
643 .label = "fan1:orange",
644 .reg = NVSW_SN2201_FAN_LED1_CTRL_OFFSET,
645 .mask = GENMASK(7, 4),
646 },
647 {
648 .label = "fan2:green",
649 .reg = NVSW_SN2201_FAN_LED1_CTRL_OFFSET,
650 .mask = GENMASK(3, 0),
651 },
652 {
653 .label = "fan2:orange",
654 .reg = NVSW_SN2201_FAN_LED1_CTRL_OFFSET,
655 .mask = GENMASK(3, 0),
656 },
657 {
658 .label = "fan3:green",
659 .reg = NVSW_SN2201_FAN_LED2_CTRL_OFFSET,
660 .mask = GENMASK(7, 4),
661 },
662 {
663 .label = "fan3:orange",
664 .reg = NVSW_SN2201_FAN_LED2_CTRL_OFFSET,
665 .mask = GENMASK(7, 4),
666 },
667 {
668 .label = "fan4:green",
669 .reg = NVSW_SN2201_FAN_LED2_CTRL_OFFSET,
670 .mask = GENMASK(3, 0),
671 },
672 {
673 .label = "fan4:orange",
674 .reg = NVSW_SN2201_FAN_LED2_CTRL_OFFSET,
675 .mask = GENMASK(3, 0),
676 },
677 };
678
679 static struct mlxreg_core_platform_data nvsw_sn2201_led = {
680 .data = nvsw_sn2201_led_data,
681 .counter = ARRAY_SIZE(nvsw_sn2201_led_data),
682 };
683
684 /* Default register access data. */
685 static struct mlxreg_core_data nvsw_sn2201_io_data[] = {
686 {
687 .label = "cpld1_version",
688 .reg = NVSW_SN2201_CPLD_VER_OFFSET,
689 .bit = GENMASK(7, 0),
690 .mode = 0444,
691 },
692 {
693 .label = "cpld1_version_min",
694 .reg = NVSW_SN2201_CPLD_MVER_OFFSET,
695 .bit = GENMASK(7, 0),
696 .mode = 0444,
697 },
698 {
699 .label = "cpld1_pn",
700 .reg = NVSW_SN2201_CPLD_PN_OFFSET,
701 .bit = GENMASK(15, 0),
702 .mode = 0444,
703 .regnum = 2,
704 },
705 {
706 .label = "psu1_on",
707 .reg = NVSW_SN2201_PSU_CTRL_OFFSET,
708 .mask = GENMASK(7, 0) & ~BIT(0),
709 .mode = 0644,
710 },
711 {
712 .label = "psu2_on",
713 .reg = NVSW_SN2201_PSU_CTRL_OFFSET,
714 .mask = GENMASK(7, 0) & ~BIT(1),
715 .mode = 0644,
716 },
717 {
718 .label = "pwr_cycle",
719 .reg = NVSW_SN2201_PSU_CTRL_OFFSET,
720 .mask = GENMASK(7, 0) & ~BIT(2),
721 .mode = 0644,
722 },
723 {
724 .label = "asic_health",
725 .reg = NVSW_SN2201_SYS_STATUS_OFFSET,
726 .mask = GENMASK(4, 3),
727 .bit = 4,
728 .mode = 0444,
729 },
730 {
731 .label = "qsfp_pwr_good",
732 .reg = NVSW_SN2201_SYS_STATUS_OFFSET,
733 .mask = GENMASK(7, 0) & ~BIT(0),
734 .mode = 0444,
735 },
736 {
737 .label = "phy_reset",
738 .reg = NVSW_SN2201_SYS_RST_STATUS_OFFSET,
739 .mask = GENMASK(7, 0) & ~BIT(3),
740 .mode = 0644,
741 },
742 {
743 .label = "mac_reset",
744 .reg = NVSW_SN2201_SYS_RST_STATUS_OFFSET,
745 .mask = GENMASK(7, 0) & ~BIT(2),
746 .mode = 0644,
747 },
748 {
749 .label = "pwr_down",
750 .reg = NVSW_SN2201_RST_SW_CTRL_OFFSET,
751 .mask = GENMASK(7, 0) & ~BIT(0),
752 .mode = 0644,
753 },
754 {
755 .label = "reset_long_pb",
756 .reg = NVSW_SN2201_RST_CAUSE1_OFFSET,
757 .mask = GENMASK(7, 0) & ~BIT(0),
758 .mode = 0444,
759 },
760 {
761 .label = "reset_short_pb",
762 .reg = NVSW_SN2201_RST_CAUSE1_OFFSET,
763 .mask = GENMASK(7, 0) & ~BIT(1),
764 .mode = 0444,
765 },
766 {
767 .label = "reset_aux_pwr_or_fu",
768 .reg = NVSW_SN2201_RST_CAUSE1_OFFSET,
769 .mask = GENMASK(7, 0) & ~BIT(2),
770 .mode = 0444,
771 },
772 {
773 .label = "reset_swb_dc_dc_pwr_fail",
774 .reg = NVSW_SN2201_RST_CAUSE1_OFFSET,
775 .mask = GENMASK(7, 0) & ~BIT(3),
776 .mode = 0444,
777 },
778 {
779 .label = "reset_sw_reset",
780 .reg = NVSW_SN2201_RST_CAUSE1_OFFSET,
781 .mask = GENMASK(7, 0) & ~BIT(4),
782 .mode = 0444,
783 },
784 {
785 .label = "reset_fw_reset",
786 .reg = NVSW_SN2201_RST_CAUSE1_OFFSET,
787 .mask = GENMASK(7, 0) & ~BIT(5),
788 .mode = 0444,
789 },
790 {
791 .label = "reset_swb_wd",
792 .reg = NVSW_SN2201_RST_CAUSE1_OFFSET,
793 .mask = GENMASK(7, 0) & ~BIT(6),
794 .mode = 0444,
795 },
796 {
797 .label = "reset_asic_thermal",
798 .reg = NVSW_SN2201_RST_CAUSE1_OFFSET,
799 .mask = GENMASK(7, 0) & ~BIT(7),
800 .mode = 0444,
801 },
802 {
803 .label = "reset_system",
804 .reg = NVSW_SN2201_RST_CAUSE2_OFFSET,
805 .mask = GENMASK(7, 0) & ~BIT(1),
806 .mode = 0444,
807 },
808 {
809 .label = "reset_sw_pwr_off",
810 .reg = NVSW_SN2201_RST_CAUSE2_OFFSET,
811 .mask = GENMASK(7, 0) & ~BIT(2),
812 .mode = 0444,
813 },
814 {
815 .label = "reset_cpu_pwr_fail_thermal",
816 .reg = NVSW_SN2201_RST_CAUSE2_OFFSET,
817 .mask = GENMASK(7, 0) & ~BIT(4),
818 .mode = 0444,
819 },
820 {
821 .label = "reset_reload_bios",
822 .reg = NVSW_SN2201_RST_CAUSE2_OFFSET,
823 .mask = GENMASK(7, 0) & ~BIT(5),
824 .mode = 0444,
825 },
826 {
827 .label = "reset_ac_pwr_fail",
828 .reg = NVSW_SN2201_RST_CAUSE2_OFFSET,
829 .mask = GENMASK(7, 0) & ~BIT(6),
830 .mode = 0444,
831 },
832 {
833 .label = "psu1",
834 .reg = NVSW_SN2201_PS_PRSNT_STATUS_OFFSET,
835 .mask = GENMASK(7, 0) & ~BIT(0),
836 .mode = 0444,
837 },
838 {
839 .label = "psu2",
840 .reg = NVSW_SN2201_PS_PRSNT_STATUS_OFFSET,
841 .mask = GENMASK(7, 0) & ~BIT(1),
842 .mode = 0444,
843 },
844 };
845
846 static struct mlxreg_core_platform_data nvsw_sn2201_regs_io = {
847 .data = nvsw_sn2201_io_data,
848 .counter = ARRAY_SIZE(nvsw_sn2201_io_data),
849 };
850
851 /* Default watchdog data. */
852 static struct mlxreg_core_data nvsw_sn2201_wd_data[] = {
853 {
854 .label = "action",
855 .reg = NVSW_SN2201_WD_ACT_OFFSET,
856 .mask = GENMASK(7, 1),
857 .bit = 0,
858 },
859 {
860 .label = "timeout",
861 .reg = NVSW_SN2201_WD_TMR_OFFSET_LSB,
862 .mask = 0,
863 .health_cntr = NVSW_SN2201_WD_DFLT_TIMEOUT,
864 },
865 {
866 .label = "timeleft",
867 .reg = NVSW_SN2201_WD_TMR_OFFSET_LSB,
868 .mask = 0,
869 },
870 {
871 .label = "ping",
872 .reg = NVSW_SN2201_WD_ACT_OFFSET,
873 .mask = GENMASK(7, 1),
874 .bit = 0,
875 },
876 {
877 .label = "reset",
878 .reg = NVSW_SN2201_RST_CAUSE1_OFFSET,
879 .mask = GENMASK(7, 0) & ~BIT(6),
880 .bit = 6,
881 },
882 };
883
884 static struct mlxreg_core_platform_data nvsw_sn2201_wd = {
885 .data = nvsw_sn2201_wd_data,
886 .counter = ARRAY_SIZE(nvsw_sn2201_wd_data),
887 .version = MLX_WDT_TYPE3,
888 .identity = "mlx-wdt-main",
889 };
890
891 static int
nvsw_sn2201_create_static_devices(struct nvsw_sn2201 * nvsw_sn2201,struct mlxreg_hotplug_device * devs,int size)892 nvsw_sn2201_create_static_devices(struct nvsw_sn2201 *nvsw_sn2201,
893 struct mlxreg_hotplug_device *devs,
894 int size)
895 {
896 struct mlxreg_hotplug_device *dev = devs;
897 int ret;
898 int i;
899
900 /* Create I2C static devices. */
901 for (i = 0; i < size; i++, dev++) {
902 dev->client = i2c_new_client_device(dev->adapter, dev->brdinfo);
903 if (IS_ERR(dev->client)) {
904 dev_err(nvsw_sn2201->dev, "Failed to create client %s at bus %d at addr 0x%02x\n",
905 dev->brdinfo->type,
906 dev->nr, dev->brdinfo->addr);
907
908 dev->adapter = NULL;
909 ret = PTR_ERR(dev->client);
910 goto fail_create_static_devices;
911 }
912 }
913
914 return 0;
915
916 fail_create_static_devices:
917 while (--i >= 0) {
918 dev = devs + i;
919 i2c_unregister_device(dev->client);
920 dev->client = NULL;
921 dev->adapter = NULL;
922 }
923 return ret;
924 }
925
nvsw_sn2201_destroy_static_devices(struct nvsw_sn2201 * nvsw_sn2201,struct mlxreg_hotplug_device * devs,int size)926 static void nvsw_sn2201_destroy_static_devices(struct nvsw_sn2201 *nvsw_sn2201,
927 struct mlxreg_hotplug_device *devs, int size)
928 {
929 struct mlxreg_hotplug_device *dev = devs;
930 int i;
931
932 /* Destroy static I2C device for SN2201 static devices. */
933 for (i = 0; i < size; i++, dev++) {
934 if (dev->client) {
935 i2c_unregister_device(dev->client);
936 dev->client = NULL;
937 i2c_put_adapter(dev->adapter);
938 dev->adapter = NULL;
939 }
940 }
941 }
942
nvsw_sn2201_config_post_init(struct nvsw_sn2201 * nvsw_sn2201)943 static int nvsw_sn2201_config_post_init(struct nvsw_sn2201 *nvsw_sn2201)
944 {
945 struct mlxreg_hotplug_device *sn2201_dev;
946 struct i2c_adapter *adap;
947 struct device *dev;
948 int i, err;
949
950 dev = nvsw_sn2201->dev;
951 adap = i2c_get_adapter(nvsw_sn2201->main_mux_deferred_nr);
952 if (!adap) {
953 dev_err(dev, "Failed to get adapter for bus %d\n",
954 nvsw_sn2201->main_mux_deferred_nr);
955 return -ENODEV;
956 }
957 i2c_put_adapter(adap);
958
959 /* Update board info. */
960 sn2201_dev = nvsw_sn2201->sn2201_devs;
961 for (i = 0; i < nvsw_sn2201->sn2201_devs_num; i++, sn2201_dev++) {
962 sn2201_dev->adapter = i2c_get_adapter(sn2201_dev->nr);
963 if (!sn2201_dev->adapter)
964 return -ENODEV;
965 i2c_put_adapter(sn2201_dev->adapter);
966 }
967
968 err = nvsw_sn2201_create_static_devices(nvsw_sn2201, nvsw_sn2201->sn2201_devs,
969 nvsw_sn2201->sn2201_devs_num);
970 if (err)
971 dev_err(dev, "Failed to create static devices\n");
972
973 return err;
974 }
975
nvsw_sn2201_config_init(struct nvsw_sn2201 * nvsw_sn2201,void * regmap)976 static int nvsw_sn2201_config_init(struct nvsw_sn2201 *nvsw_sn2201, void *regmap)
977 {
978 struct device *dev = nvsw_sn2201->dev;
979 int err;
980
981 nvsw_sn2201->io_data = &nvsw_sn2201_regs_io;
982 nvsw_sn2201->led_data = &nvsw_sn2201_led;
983 nvsw_sn2201->wd_data = &nvsw_sn2201_wd;
984 nvsw_sn2201->hotplug_data = &nvsw_sn2201_hotplug;
985
986 /* Register IO access driver. */
987 if (nvsw_sn2201->io_data) {
988 nvsw_sn2201->io_data->regmap = regmap;
989 nvsw_sn2201->io_regs =
990 platform_device_register_resndata(dev, "mlxreg-io", PLATFORM_DEVID_NONE, NULL, 0,
991 nvsw_sn2201->io_data,
992 sizeof(*nvsw_sn2201->io_data));
993 if (IS_ERR(nvsw_sn2201->io_regs)) {
994 err = PTR_ERR(nvsw_sn2201->io_regs);
995 goto fail_register_io;
996 }
997 }
998
999 /* Register LED driver. */
1000 if (nvsw_sn2201->led_data) {
1001 nvsw_sn2201->led_data->regmap = regmap;
1002 nvsw_sn2201->led =
1003 platform_device_register_resndata(dev, "leds-mlxreg", PLATFORM_DEVID_NONE, NULL, 0,
1004 nvsw_sn2201->led_data,
1005 sizeof(*nvsw_sn2201->led_data));
1006 if (IS_ERR(nvsw_sn2201->led)) {
1007 err = PTR_ERR(nvsw_sn2201->led);
1008 goto fail_register_led;
1009 }
1010 }
1011
1012 /* Register WD driver. */
1013 if (nvsw_sn2201->wd_data) {
1014 nvsw_sn2201->wd_data->regmap = regmap;
1015 nvsw_sn2201->wd =
1016 platform_device_register_resndata(dev, "mlx-wdt", PLATFORM_DEVID_NONE, NULL, 0,
1017 nvsw_sn2201->wd_data,
1018 sizeof(*nvsw_sn2201->wd_data));
1019 if (IS_ERR(nvsw_sn2201->wd)) {
1020 err = PTR_ERR(nvsw_sn2201->wd);
1021 goto fail_register_wd;
1022 }
1023 }
1024
1025 /* Register hotplug driver. */
1026 if (nvsw_sn2201->hotplug_data) {
1027 nvsw_sn2201->hotplug_data->regmap = regmap;
1028 nvsw_sn2201->pdev_hotplug =
1029 platform_device_register_resndata(dev, "mlxreg-hotplug", PLATFORM_DEVID_NONE,
1030 nvsw_sn2201_cpld_res,
1031 ARRAY_SIZE(nvsw_sn2201_cpld_res),
1032 nvsw_sn2201->hotplug_data,
1033 sizeof(*nvsw_sn2201->hotplug_data));
1034 if (IS_ERR(nvsw_sn2201->pdev_hotplug)) {
1035 err = PTR_ERR(nvsw_sn2201->pdev_hotplug);
1036 goto fail_register_hotplug;
1037 }
1038 }
1039
1040 return nvsw_sn2201_config_post_init(nvsw_sn2201);
1041
1042 fail_register_hotplug:
1043 if (nvsw_sn2201->wd)
1044 platform_device_unregister(nvsw_sn2201->wd);
1045 fail_register_wd:
1046 if (nvsw_sn2201->led)
1047 platform_device_unregister(nvsw_sn2201->led);
1048 fail_register_led:
1049 if (nvsw_sn2201->io_regs)
1050 platform_device_unregister(nvsw_sn2201->io_regs);
1051 fail_register_io:
1052
1053 return err;
1054 }
1055
nvsw_sn2201_config_exit(struct nvsw_sn2201 * nvsw_sn2201)1056 static void nvsw_sn2201_config_exit(struct nvsw_sn2201 *nvsw_sn2201)
1057 {
1058 /* Unregister hotplug driver. */
1059 if (nvsw_sn2201->pdev_hotplug)
1060 platform_device_unregister(nvsw_sn2201->pdev_hotplug);
1061 /* Unregister WD driver. */
1062 if (nvsw_sn2201->wd)
1063 platform_device_unregister(nvsw_sn2201->wd);
1064 /* Unregister LED driver. */
1065 if (nvsw_sn2201->led)
1066 platform_device_unregister(nvsw_sn2201->led);
1067 /* Unregister IO access driver. */
1068 if (nvsw_sn2201->io_regs)
1069 platform_device_unregister(nvsw_sn2201->io_regs);
1070 }
1071
1072 /*
1073 * Initialization is divided into two parts:
1074 * - I2C main bus init.
1075 * - Mux creation and attaching devices to the mux,
1076 * which assumes that the main bus is already created.
1077 * This separation is required for synchronization between these two parts.
1078 * Completion notify callback is used to make this flow synchronized.
1079 */
nvsw_sn2201_i2c_completion_notify(void * handle,int id)1080 static int nvsw_sn2201_i2c_completion_notify(void *handle, int id)
1081 {
1082 struct nvsw_sn2201 *nvsw_sn2201 = handle;
1083 void *regmap;
1084 int i, err;
1085
1086 /* Create main mux. */
1087 nvsw_sn2201->main_mux_devs->adapter = i2c_get_adapter(nvsw_sn2201->main_mux_devs->nr);
1088 if (!nvsw_sn2201->main_mux_devs->adapter) {
1089 err = -ENODEV;
1090 dev_err(nvsw_sn2201->dev, "Failed to get adapter for bus %d\n",
1091 nvsw_sn2201->cpld_devs->nr);
1092 goto i2c_get_adapter_main_fail;
1093 }
1094
1095 nvsw_sn2201->main_mux_devs_num = ARRAY_SIZE(nvsw_sn2201_main_mux_brdinfo);
1096 err = nvsw_sn2201_create_static_devices(nvsw_sn2201, nvsw_sn2201->main_mux_devs,
1097 nvsw_sn2201->main_mux_devs_num);
1098 if (err) {
1099 dev_err(nvsw_sn2201->dev, "Failed to create main mux devices\n");
1100 goto nvsw_sn2201_create_static_devices_fail;
1101 }
1102
1103 nvsw_sn2201->cpld_devs->adapter = i2c_get_adapter(nvsw_sn2201->cpld_devs->nr);
1104 if (!nvsw_sn2201->cpld_devs->adapter) {
1105 err = -ENODEV;
1106 dev_err(nvsw_sn2201->dev, "Failed to get adapter for bus %d\n",
1107 nvsw_sn2201->cpld_devs->nr);
1108 goto i2c_get_adapter_fail;
1109 }
1110
1111 /* Create CPLD device. */
1112 nvsw_sn2201->cpld_devs->client = i2c_new_dummy_device(nvsw_sn2201->cpld_devs->adapter,
1113 NVSW_SN2201_CPLD_I2CADDR);
1114 if (IS_ERR(nvsw_sn2201->cpld_devs->client)) {
1115 err = PTR_ERR(nvsw_sn2201->cpld_devs->client);
1116 dev_err(nvsw_sn2201->dev, "Failed to create %s cpld device at bus %d at addr 0x%02x\n",
1117 nvsw_sn2201->cpld_devs->brdinfo->type, nvsw_sn2201->cpld_devs->nr,
1118 nvsw_sn2201->cpld_devs->brdinfo->addr);
1119 goto i2c_new_dummy_fail;
1120 }
1121
1122 regmap = devm_regmap_init_i2c(nvsw_sn2201->cpld_devs->client, &nvsw_sn2201_regmap_conf);
1123 if (IS_ERR(regmap)) {
1124 err = PTR_ERR(regmap);
1125 dev_err(nvsw_sn2201->dev, "Failed to initialise managed register map\n");
1126 goto devm_regmap_init_i2c_fail;
1127 }
1128
1129 /* Set default registers. */
1130 for (i = 0; i < nvsw_sn2201_regmap_conf.num_reg_defaults; i++) {
1131 err = regmap_write(regmap, nvsw_sn2201_regmap_default[i].reg,
1132 nvsw_sn2201_regmap_default[i].def);
1133 if (err) {
1134 dev_err(nvsw_sn2201->dev, "Failed to set register at offset 0x%02x to default value: 0x%02x\n",
1135 nvsw_sn2201_regmap_default[i].reg,
1136 nvsw_sn2201_regmap_default[i].def);
1137 goto regmap_write_fail;
1138 }
1139 }
1140
1141 /* Sync registers with hardware. */
1142 regcache_mark_dirty(regmap);
1143 err = regcache_sync(regmap);
1144 if (err) {
1145 dev_err(nvsw_sn2201->dev, "Failed to Sync registers with hardware\n");
1146 goto regcache_sync_fail;
1147 }
1148
1149 /* Configure SN2201 board. */
1150 err = nvsw_sn2201_config_init(nvsw_sn2201, regmap);
1151 if (err) {
1152 dev_err(nvsw_sn2201->dev, "Failed to configure board\n");
1153 goto nvsw_sn2201_config_init_fail;
1154 }
1155
1156 return 0;
1157
1158 nvsw_sn2201_config_init_fail:
1159 nvsw_sn2201_config_exit(nvsw_sn2201);
1160 regcache_sync_fail:
1161 regmap_write_fail:
1162 devm_regmap_init_i2c_fail:
1163 i2c_new_dummy_fail:
1164 i2c_put_adapter(nvsw_sn2201->cpld_devs->adapter);
1165 nvsw_sn2201->cpld_devs->adapter = NULL;
1166 i2c_get_adapter_fail:
1167 /* Destroy SN2201 static I2C devices. */
1168 nvsw_sn2201_destroy_static_devices(nvsw_sn2201, nvsw_sn2201->sn2201_devs,
1169 nvsw_sn2201->sn2201_devs_num);
1170 /* Destroy main mux device. */
1171 nvsw_sn2201_destroy_static_devices(nvsw_sn2201, nvsw_sn2201->main_mux_devs,
1172 nvsw_sn2201->main_mux_devs_num);
1173 nvsw_sn2201_create_static_devices_fail:
1174 i2c_put_adapter(nvsw_sn2201->main_mux_devs->adapter);
1175 i2c_get_adapter_main_fail:
1176 return err;
1177 }
1178
nvsw_sn2201_config_pre_init(struct nvsw_sn2201 * nvsw_sn2201)1179 static int nvsw_sn2201_config_pre_init(struct nvsw_sn2201 *nvsw_sn2201)
1180 {
1181 nvsw_sn2201->i2c_data = &nvsw_sn2201_i2c_data;
1182
1183 /* Register I2C controller. */
1184 nvsw_sn2201->i2c_data->handle = nvsw_sn2201;
1185 nvsw_sn2201->i2c_data->completion_notify = nvsw_sn2201_i2c_completion_notify;
1186 nvsw_sn2201->pdev_i2c = platform_device_register_resndata(nvsw_sn2201->dev, "i2c_mlxcpld",
1187 NVSW_SN2201_MAIN_MUX_NR,
1188 nvsw_sn2201_lpc_res,
1189 ARRAY_SIZE(nvsw_sn2201_lpc_res),
1190 nvsw_sn2201->i2c_data,
1191 sizeof(*nvsw_sn2201->i2c_data));
1192 if (IS_ERR(nvsw_sn2201->pdev_i2c))
1193 return PTR_ERR(nvsw_sn2201->pdev_i2c);
1194
1195 return 0;
1196 }
1197
nvsw_sn2201_probe(struct platform_device * pdev)1198 static int nvsw_sn2201_probe(struct platform_device *pdev)
1199 {
1200 struct nvsw_sn2201 *nvsw_sn2201;
1201 int ret;
1202
1203 nvsw_sn2201 = devm_kzalloc(&pdev->dev, sizeof(*nvsw_sn2201), GFP_KERNEL);
1204 if (!nvsw_sn2201)
1205 return -ENOMEM;
1206
1207 nvsw_sn2201->dev = &pdev->dev;
1208 platform_set_drvdata(pdev, nvsw_sn2201);
1209 ret = platform_device_add_resources(pdev, nvsw_sn2201_lpc_io_resources,
1210 ARRAY_SIZE(nvsw_sn2201_lpc_io_resources));
1211 if (ret)
1212 return ret;
1213
1214 nvsw_sn2201->main_mux_deferred_nr = NVSW_SN2201_MAIN_MUX_DEFER_NR;
1215 nvsw_sn2201->main_mux_devs = nvsw_sn2201_main_mux_brdinfo;
1216 nvsw_sn2201->cpld_devs = nvsw_sn2201_cpld_brdinfo;
1217 nvsw_sn2201->sn2201_devs = nvsw_sn2201_static_brdinfo;
1218 nvsw_sn2201->sn2201_devs_num = ARRAY_SIZE(nvsw_sn2201_static_brdinfo);
1219
1220 return nvsw_sn2201_config_pre_init(nvsw_sn2201);
1221 }
1222
nvsw_sn2201_remove(struct platform_device * pdev)1223 static int nvsw_sn2201_remove(struct platform_device *pdev)
1224 {
1225 struct nvsw_sn2201 *nvsw_sn2201 = platform_get_drvdata(pdev);
1226
1227 /* Unregister underlying drivers. */
1228 nvsw_sn2201_config_exit(nvsw_sn2201);
1229
1230 /* Destroy SN2201 static I2C devices. */
1231 nvsw_sn2201_destroy_static_devices(nvsw_sn2201,
1232 nvsw_sn2201->sn2201_devs,
1233 nvsw_sn2201->sn2201_devs_num);
1234
1235 i2c_put_adapter(nvsw_sn2201->cpld_devs->adapter);
1236 nvsw_sn2201->cpld_devs->adapter = NULL;
1237 /* Destroy main mux device. */
1238 nvsw_sn2201_destroy_static_devices(nvsw_sn2201,
1239 nvsw_sn2201->main_mux_devs,
1240 nvsw_sn2201->main_mux_devs_num);
1241
1242 /* Unregister I2C controller. */
1243 if (nvsw_sn2201->pdev_i2c)
1244 platform_device_unregister(nvsw_sn2201->pdev_i2c);
1245
1246 return 0;
1247 }
1248
1249 static const struct acpi_device_id nvsw_sn2201_acpi_ids[] = {
1250 {"NVSN2201", 0},
1251 {}
1252 };
1253
1254 MODULE_DEVICE_TABLE(acpi, nvsw_sn2201_acpi_ids);
1255
1256 static struct platform_driver nvsw_sn2201_driver = {
1257 .probe = nvsw_sn2201_probe,
1258 .remove = nvsw_sn2201_remove,
1259 .driver = {
1260 .name = "nvsw-sn2201",
1261 .acpi_match_table = nvsw_sn2201_acpi_ids,
1262 },
1263 };
1264
1265 module_platform_driver(nvsw_sn2201_driver);
1266
1267 MODULE_AUTHOR("Nvidia");
1268 MODULE_DESCRIPTION("Nvidia sn2201 platform driver");
1269 MODULE_LICENSE("Dual BSD/GPL");
1270 MODULE_ALIAS("platform:nvsw-sn2201");
1271