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f1fd4a4d TM |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | // Copyright (c) 2014-2018 Nuvoton Technology corporation. | |
3 | ||
4 | #include <linux/clk.h> | |
5 | #include <linux/device.h> | |
6 | #include <linux/hwmon.h> | |
7 | #include <linux/hwmon-sysfs.h> | |
8 | #include <linux/interrupt.h> | |
9 | #include <linux/kernel.h> | |
10 | #include <linux/module.h> | |
11 | #include <linux/of_address.h> | |
12 | #include <linux/of_irq.h> | |
13 | #include <linux/platform_device.h> | |
14 | #include <linux/spinlock.h> | |
15 | #include <linux/sysfs.h> | |
16 | #include <linux/thermal.h> | |
17 | ||
18 | /* NPCM7XX PWM registers */ | |
19 | #define NPCM7XX_PWM_REG_BASE(base, n) ((base) + ((n) * 0x1000L)) | |
20 | ||
21 | #define NPCM7XX_PWM_REG_PR(base, n) (NPCM7XX_PWM_REG_BASE(base, n) + 0x00) | |
22 | #define NPCM7XX_PWM_REG_CSR(base, n) (NPCM7XX_PWM_REG_BASE(base, n) + 0x04) | |
23 | #define NPCM7XX_PWM_REG_CR(base, n) (NPCM7XX_PWM_REG_BASE(base, n) + 0x08) | |
24 | #define NPCM7XX_PWM_REG_CNRx(base, n, ch) \ | |
25 | (NPCM7XX_PWM_REG_BASE(base, n) + 0x0C + (12 * (ch))) | |
26 | #define NPCM7XX_PWM_REG_CMRx(base, n, ch) \ | |
27 | (NPCM7XX_PWM_REG_BASE(base, n) + 0x10 + (12 * (ch))) | |
28 | #define NPCM7XX_PWM_REG_PDRx(base, n, ch) \ | |
29 | (NPCM7XX_PWM_REG_BASE(base, n) + 0x14 + (12 * (ch))) | |
30 | #define NPCM7XX_PWM_REG_PIER(base, n) (NPCM7XX_PWM_REG_BASE(base, n) + 0x3C) | |
31 | #define NPCM7XX_PWM_REG_PIIR(base, n) (NPCM7XX_PWM_REG_BASE(base, n) + 0x40) | |
32 | ||
33 | #define NPCM7XX_PWM_CTRL_CH0_MODE_BIT BIT(3) | |
34 | #define NPCM7XX_PWM_CTRL_CH1_MODE_BIT BIT(11) | |
35 | #define NPCM7XX_PWM_CTRL_CH2_MODE_BIT BIT(15) | |
36 | #define NPCM7XX_PWM_CTRL_CH3_MODE_BIT BIT(19) | |
37 | ||
38 | #define NPCM7XX_PWM_CTRL_CH0_INV_BIT BIT(2) | |
39 | #define NPCM7XX_PWM_CTRL_CH1_INV_BIT BIT(10) | |
40 | #define NPCM7XX_PWM_CTRL_CH2_INV_BIT BIT(14) | |
41 | #define NPCM7XX_PWM_CTRL_CH3_INV_BIT BIT(18) | |
42 | ||
43 | #define NPCM7XX_PWM_CTRL_CH0_EN_BIT BIT(0) | |
44 | #define NPCM7XX_PWM_CTRL_CH1_EN_BIT BIT(8) | |
45 | #define NPCM7XX_PWM_CTRL_CH2_EN_BIT BIT(12) | |
46 | #define NPCM7XX_PWM_CTRL_CH3_EN_BIT BIT(16) | |
47 | ||
48 | /* Define the maximum PWM channel number */ | |
89fec128 | 49 | #define NPCM7XX_PWM_MAX_CHN_NUM 12 |
f1fd4a4d | 50 | #define NPCM7XX_PWM_MAX_CHN_NUM_IN_A_MODULE 4 |
89fec128 | 51 | #define NPCM7XX_PWM_MAX_MODULES 3 |
f1fd4a4d TM |
52 | |
53 | /* Define the Counter Register, value = 100 for match 100% */ | |
54 | #define NPCM7XX_PWM_COUNTER_DEFAULT_NUM 255 | |
f21c8e75 | 55 | #define NPCM7XX_PWM_CMR_DEFAULT_NUM 255 |
f1fd4a4d TM |
56 | #define NPCM7XX_PWM_CMR_MAX 255 |
57 | ||
58 | /* default all PWM channels PRESCALE2 = 1 */ | |
59 | #define NPCM7XX_PWM_PRESCALE2_DEFAULT_CH0 0x4 | |
60 | #define NPCM7XX_PWM_PRESCALE2_DEFAULT_CH1 0x40 | |
61 | #define NPCM7XX_PWM_PRESCALE2_DEFAULT_CH2 0x400 | |
62 | #define NPCM7XX_PWM_PRESCALE2_DEFAULT_CH3 0x4000 | |
63 | ||
64 | #define PWM_OUTPUT_FREQ_25KHZ 25000 | |
65 | #define PWN_CNT_DEFAULT 256 | |
66 | #define MIN_PRESCALE1 2 | |
67 | #define NPCM7XX_PWM_PRESCALE_SHIFT_CH01 8 | |
68 | ||
69 | #define NPCM7XX_PWM_PRESCALE2_DEFAULT (NPCM7XX_PWM_PRESCALE2_DEFAULT_CH0 | \ | |
70 | NPCM7XX_PWM_PRESCALE2_DEFAULT_CH1 | \ | |
71 | NPCM7XX_PWM_PRESCALE2_DEFAULT_CH2 | \ | |
72 | NPCM7XX_PWM_PRESCALE2_DEFAULT_CH3) | |
73 | ||
74 | #define NPCM7XX_PWM_CTRL_MODE_DEFAULT (NPCM7XX_PWM_CTRL_CH0_MODE_BIT | \ | |
75 | NPCM7XX_PWM_CTRL_CH1_MODE_BIT | \ | |
76 | NPCM7XX_PWM_CTRL_CH2_MODE_BIT | \ | |
77 | NPCM7XX_PWM_CTRL_CH3_MODE_BIT) | |
78 | ||
79 | /* NPCM7XX FAN Tacho registers */ | |
80 | #define NPCM7XX_FAN_REG_BASE(base, n) ((base) + ((n) * 0x1000L)) | |
81 | ||
82 | #define NPCM7XX_FAN_REG_TCNT1(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x00) | |
83 | #define NPCM7XX_FAN_REG_TCRA(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x02) | |
84 | #define NPCM7XX_FAN_REG_TCRB(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x04) | |
85 | #define NPCM7XX_FAN_REG_TCNT2(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x06) | |
86 | #define NPCM7XX_FAN_REG_TPRSC(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x08) | |
87 | #define NPCM7XX_FAN_REG_TCKC(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x0A) | |
88 | #define NPCM7XX_FAN_REG_TMCTRL(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x0C) | |
89 | #define NPCM7XX_FAN_REG_TICTRL(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x0E) | |
90 | #define NPCM7XX_FAN_REG_TICLR(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x10) | |
91 | #define NPCM7XX_FAN_REG_TIEN(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x12) | |
92 | #define NPCM7XX_FAN_REG_TCPA(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x14) | |
93 | #define NPCM7XX_FAN_REG_TCPB(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x16) | |
94 | #define NPCM7XX_FAN_REG_TCPCFG(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x18) | |
95 | #define NPCM7XX_FAN_REG_TINASEL(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x1A) | |
96 | #define NPCM7XX_FAN_REG_TINBSEL(base, n) (NPCM7XX_FAN_REG_BASE(base, n) + 0x1C) | |
97 | ||
98 | #define NPCM7XX_FAN_TCKC_CLKX_NONE 0 | |
99 | #define NPCM7XX_FAN_TCKC_CLK1_APB BIT(0) | |
100 | #define NPCM7XX_FAN_TCKC_CLK2_APB BIT(3) | |
101 | ||
102 | #define NPCM7XX_FAN_TMCTRL_TBEN BIT(6) | |
103 | #define NPCM7XX_FAN_TMCTRL_TAEN BIT(5) | |
104 | #define NPCM7XX_FAN_TMCTRL_TBEDG BIT(4) | |
105 | #define NPCM7XX_FAN_TMCTRL_TAEDG BIT(3) | |
106 | #define NPCM7XX_FAN_TMCTRL_MODE_5 BIT(2) | |
107 | ||
108 | #define NPCM7XX_FAN_TICLR_CLEAR_ALL GENMASK(5, 0) | |
109 | #define NPCM7XX_FAN_TICLR_TFCLR BIT(5) | |
110 | #define NPCM7XX_FAN_TICLR_TECLR BIT(4) | |
111 | #define NPCM7XX_FAN_TICLR_TDCLR BIT(3) | |
112 | #define NPCM7XX_FAN_TICLR_TCCLR BIT(2) | |
113 | #define NPCM7XX_FAN_TICLR_TBCLR BIT(1) | |
114 | #define NPCM7XX_FAN_TICLR_TACLR BIT(0) | |
115 | ||
116 | #define NPCM7XX_FAN_TIEN_ENABLE_ALL GENMASK(5, 0) | |
117 | #define NPCM7XX_FAN_TIEN_TFIEN BIT(5) | |
118 | #define NPCM7XX_FAN_TIEN_TEIEN BIT(4) | |
119 | #define NPCM7XX_FAN_TIEN_TDIEN BIT(3) | |
120 | #define NPCM7XX_FAN_TIEN_TCIEN BIT(2) | |
121 | #define NPCM7XX_FAN_TIEN_TBIEN BIT(1) | |
122 | #define NPCM7XX_FAN_TIEN_TAIEN BIT(0) | |
123 | ||
124 | #define NPCM7XX_FAN_TICTRL_TFPND BIT(5) | |
125 | #define NPCM7XX_FAN_TICTRL_TEPND BIT(4) | |
126 | #define NPCM7XX_FAN_TICTRL_TDPND BIT(3) | |
127 | #define NPCM7XX_FAN_TICTRL_TCPND BIT(2) | |
128 | #define NPCM7XX_FAN_TICTRL_TBPND BIT(1) | |
129 | #define NPCM7XX_FAN_TICTRL_TAPND BIT(0) | |
130 | ||
131 | #define NPCM7XX_FAN_TCPCFG_HIBEN BIT(7) | |
132 | #define NPCM7XX_FAN_TCPCFG_EQBEN BIT(6) | |
133 | #define NPCM7XX_FAN_TCPCFG_LOBEN BIT(5) | |
134 | #define NPCM7XX_FAN_TCPCFG_CPBSEL BIT(4) | |
135 | #define NPCM7XX_FAN_TCPCFG_HIAEN BIT(3) | |
136 | #define NPCM7XX_FAN_TCPCFG_EQAEN BIT(2) | |
137 | #define NPCM7XX_FAN_TCPCFG_LOAEN BIT(1) | |
138 | #define NPCM7XX_FAN_TCPCFG_CPASEL BIT(0) | |
139 | ||
140 | /* FAN General Definition */ | |
141 | /* Define the maximum FAN channel number */ | |
142 | #define NPCM7XX_FAN_MAX_MODULE 8 | |
143 | #define NPCM7XX_FAN_MAX_CHN_NUM_IN_A_MODULE 2 | |
144 | #define NPCM7XX_FAN_MAX_CHN_NUM 16 | |
145 | ||
146 | /* | |
147 | * Get Fan Tach Timeout (base on clock 214843.75Hz, 1 cnt = 4.654us) | |
148 | * Timeout 94ms ~= 0x5000 | |
149 | * (The minimum FAN speed could to support ~640RPM/pulse 1, | |
150 | * 320RPM/pulse 2, ...-- 10.6Hz) | |
151 | */ | |
152 | #define NPCM7XX_FAN_TIMEOUT 0x5000 | |
153 | #define NPCM7XX_FAN_TCNT 0xFFFF | |
154 | #define NPCM7XX_FAN_TCPA (NPCM7XX_FAN_TCNT - NPCM7XX_FAN_TIMEOUT) | |
155 | #define NPCM7XX_FAN_TCPB (NPCM7XX_FAN_TCNT - NPCM7XX_FAN_TIMEOUT) | |
156 | ||
157 | #define NPCM7XX_FAN_POLL_TIMER_200MS 200 | |
158 | #define NPCM7XX_FAN_DEFAULT_PULSE_PER_REVOLUTION 2 | |
159 | #define NPCM7XX_FAN_TINASEL_FANIN_DEFAULT 0 | |
160 | #define NPCM7XX_FAN_CLK_PRESCALE 255 | |
161 | ||
162 | #define NPCM7XX_FAN_CMPA 0 | |
163 | #define NPCM7XX_FAN_CMPB 1 | |
164 | ||
165 | /* Obtain the fan number */ | |
166 | #define NPCM7XX_FAN_INPUT(fan, cmp) (((fan) << 1) + (cmp)) | |
167 | ||
168 | /* fan sample status */ | |
169 | #define FAN_DISABLE 0xFF | |
170 | #define FAN_INIT 0x00 | |
171 | #define FAN_PREPARE_TO_GET_FIRST_CAPTURE 0x01 | |
172 | #define FAN_ENOUGH_SAMPLE 0x02 | |
173 | ||
89fec128 TM |
174 | struct npcm_hwmon_info { |
175 | u32 pwm_max_channel; | |
176 | }; | |
177 | ||
f1fd4a4d TM |
178 | struct npcm7xx_fan_dev { |
179 | u8 fan_st_flg; | |
180 | u8 fan_pls_per_rev; | |
181 | u16 fan_cnt; | |
182 | u32 fan_cnt_tmp; | |
183 | }; | |
184 | ||
185 | struct npcm7xx_cooling_device { | |
186 | char name[THERMAL_NAME_LENGTH]; | |
187 | struct npcm7xx_pwm_fan_data *data; | |
188 | struct thermal_cooling_device *tcdev; | |
189 | int pwm_port; | |
190 | u8 *cooling_levels; | |
191 | u8 max_state; | |
192 | u8 cur_state; | |
193 | }; | |
194 | ||
195 | struct npcm7xx_pwm_fan_data { | |
196 | void __iomem *pwm_base; | |
197 | void __iomem *fan_base; | |
2539b15d | 198 | int pwm_modules; |
f1fd4a4d TM |
199 | struct clk *pwm_clk; |
200 | struct clk *fan_clk; | |
201 | struct mutex pwm_lock[NPCM7XX_PWM_MAX_MODULES]; | |
202 | spinlock_t fan_lock[NPCM7XX_FAN_MAX_MODULE]; | |
203 | int fan_irq[NPCM7XX_FAN_MAX_MODULE]; | |
204 | bool pwm_present[NPCM7XX_PWM_MAX_CHN_NUM]; | |
205 | bool fan_present[NPCM7XX_FAN_MAX_CHN_NUM]; | |
206 | u32 input_clk_freq; | |
207 | struct timer_list fan_timer; | |
208 | struct npcm7xx_fan_dev fan_dev[NPCM7XX_FAN_MAX_CHN_NUM]; | |
209 | struct npcm7xx_cooling_device *cdev[NPCM7XX_PWM_MAX_CHN_NUM]; | |
89fec128 | 210 | const struct npcm_hwmon_info *info; |
f1fd4a4d TM |
211 | u8 fan_select; |
212 | }; | |
213 | ||
214 | static int npcm7xx_pwm_config_set(struct npcm7xx_pwm_fan_data *data, | |
215 | int channel, u16 val) | |
216 | { | |
217 | u32 pwm_ch = (channel % NPCM7XX_PWM_MAX_CHN_NUM_IN_A_MODULE); | |
218 | u32 module = (channel / NPCM7XX_PWM_MAX_CHN_NUM_IN_A_MODULE); | |
219 | u32 tmp_buf, ctrl_en_bit, env_bit; | |
220 | ||
221 | /* | |
222 | * Config PWM Comparator register for setting duty cycle | |
223 | */ | |
224 | mutex_lock(&data->pwm_lock[module]); | |
225 | ||
226 | /* write new CMR value */ | |
227 | iowrite32(val, NPCM7XX_PWM_REG_CMRx(data->pwm_base, module, pwm_ch)); | |
228 | tmp_buf = ioread32(NPCM7XX_PWM_REG_CR(data->pwm_base, module)); | |
229 | ||
230 | switch (pwm_ch) { | |
231 | case 0: | |
232 | ctrl_en_bit = NPCM7XX_PWM_CTRL_CH0_EN_BIT; | |
233 | env_bit = NPCM7XX_PWM_CTRL_CH0_INV_BIT; | |
234 | break; | |
235 | case 1: | |
236 | ctrl_en_bit = NPCM7XX_PWM_CTRL_CH1_EN_BIT; | |
237 | env_bit = NPCM7XX_PWM_CTRL_CH1_INV_BIT; | |
238 | break; | |
239 | case 2: | |
240 | ctrl_en_bit = NPCM7XX_PWM_CTRL_CH2_EN_BIT; | |
241 | env_bit = NPCM7XX_PWM_CTRL_CH2_INV_BIT; | |
242 | break; | |
243 | case 3: | |
244 | ctrl_en_bit = NPCM7XX_PWM_CTRL_CH3_EN_BIT; | |
245 | env_bit = NPCM7XX_PWM_CTRL_CH3_INV_BIT; | |
246 | break; | |
247 | default: | |
248 | mutex_unlock(&data->pwm_lock[module]); | |
249 | return -ENODEV; | |
250 | } | |
251 | ||
252 | if (val == 0) { | |
253 | /* Disable PWM */ | |
254 | tmp_buf &= ~ctrl_en_bit; | |
255 | tmp_buf |= env_bit; | |
256 | } else { | |
257 | /* Enable PWM */ | |
258 | tmp_buf |= ctrl_en_bit; | |
259 | tmp_buf &= ~env_bit; | |
260 | } | |
261 | ||
262 | iowrite32(tmp_buf, NPCM7XX_PWM_REG_CR(data->pwm_base, module)); | |
263 | mutex_unlock(&data->pwm_lock[module]); | |
264 | ||
265 | return 0; | |
266 | } | |
267 | ||
268 | static inline void npcm7xx_fan_start_capture(struct npcm7xx_pwm_fan_data *data, | |
269 | u8 fan, u8 cmp) | |
270 | { | |
271 | u8 fan_id; | |
272 | u8 reg_mode; | |
273 | u8 reg_int; | |
274 | unsigned long flags; | |
275 | ||
276 | fan_id = NPCM7XX_FAN_INPUT(fan, cmp); | |
277 | ||
278 | /* to check whether any fan tach is enable */ | |
279 | if (data->fan_dev[fan_id].fan_st_flg != FAN_DISABLE) { | |
280 | /* reset status */ | |
281 | spin_lock_irqsave(&data->fan_lock[fan], flags); | |
282 | ||
283 | data->fan_dev[fan_id].fan_st_flg = FAN_INIT; | |
284 | reg_int = ioread8(NPCM7XX_FAN_REG_TIEN(data->fan_base, fan)); | |
285 | ||
286 | /* | |
287 | * the interrupt enable bits do not need to be cleared before | |
288 | * it sets, the interrupt enable bits are cleared only on reset. | |
289 | * the clock unit control register is behaving in the same | |
290 | * manner that the interrupt enable register behave. | |
291 | */ | |
292 | if (cmp == NPCM7XX_FAN_CMPA) { | |
293 | /* enable interrupt */ | |
294 | iowrite8(reg_int | (NPCM7XX_FAN_TIEN_TAIEN | | |
295 | NPCM7XX_FAN_TIEN_TEIEN), | |
296 | NPCM7XX_FAN_REG_TIEN(data->fan_base, fan)); | |
297 | ||
298 | reg_mode = NPCM7XX_FAN_TCKC_CLK1_APB | |
299 | | ioread8(NPCM7XX_FAN_REG_TCKC(data->fan_base, | |
300 | fan)); | |
301 | ||
302 | /* start to Capture */ | |
303 | iowrite8(reg_mode, NPCM7XX_FAN_REG_TCKC(data->fan_base, | |
304 | fan)); | |
305 | } else { | |
306 | /* enable interrupt */ | |
307 | iowrite8(reg_int | (NPCM7XX_FAN_TIEN_TBIEN | | |
308 | NPCM7XX_FAN_TIEN_TFIEN), | |
309 | NPCM7XX_FAN_REG_TIEN(data->fan_base, fan)); | |
310 | ||
311 | reg_mode = | |
312 | NPCM7XX_FAN_TCKC_CLK2_APB | |
313 | | ioread8(NPCM7XX_FAN_REG_TCKC(data->fan_base, | |
314 | fan)); | |
315 | ||
316 | /* start to Capture */ | |
317 | iowrite8(reg_mode, | |
318 | NPCM7XX_FAN_REG_TCKC(data->fan_base, fan)); | |
319 | } | |
320 | ||
321 | spin_unlock_irqrestore(&data->fan_lock[fan], flags); | |
322 | } | |
323 | } | |
324 | ||
325 | /* | |
326 | * Enable a background timer to poll fan tach value, (200ms * 4) | |
327 | * to polling all fan | |
328 | */ | |
329 | static void npcm7xx_fan_polling(struct timer_list *t) | |
330 | { | |
331 | struct npcm7xx_pwm_fan_data *data; | |
332 | int i; | |
333 | ||
334 | data = from_timer(data, t, fan_timer); | |
335 | ||
336 | /* | |
337 | * Polling two module per one round, | |
338 | * FAN01 & FAN89 / FAN23 & FAN1011 / FAN45 & FAN1213 / FAN67 & FAN1415 | |
339 | */ | |
340 | for (i = data->fan_select; i < NPCM7XX_FAN_MAX_MODULE; | |
341 | i = i + 4) { | |
342 | /* clear the flag and reset the counter (TCNT) */ | |
343 | iowrite8(NPCM7XX_FAN_TICLR_CLEAR_ALL, | |
344 | NPCM7XX_FAN_REG_TICLR(data->fan_base, i)); | |
345 | ||
346 | if (data->fan_present[i * 2]) { | |
347 | iowrite16(NPCM7XX_FAN_TCNT, | |
348 | NPCM7XX_FAN_REG_TCNT1(data->fan_base, i)); | |
349 | npcm7xx_fan_start_capture(data, i, NPCM7XX_FAN_CMPA); | |
350 | } | |
351 | if (data->fan_present[(i * 2) + 1]) { | |
352 | iowrite16(NPCM7XX_FAN_TCNT, | |
353 | NPCM7XX_FAN_REG_TCNT2(data->fan_base, i)); | |
354 | npcm7xx_fan_start_capture(data, i, NPCM7XX_FAN_CMPB); | |
355 | } | |
356 | } | |
357 | ||
358 | data->fan_select++; | |
359 | data->fan_select &= 0x3; | |
360 | ||
361 | /* reset the timer interval */ | |
362 | data->fan_timer.expires = jiffies + | |
363 | msecs_to_jiffies(NPCM7XX_FAN_POLL_TIMER_200MS); | |
364 | add_timer(&data->fan_timer); | |
365 | } | |
366 | ||
367 | static inline void npcm7xx_fan_compute(struct npcm7xx_pwm_fan_data *data, | |
368 | u8 fan, u8 cmp, u8 fan_id, u8 flag_int, | |
369 | u8 flag_mode, u8 flag_clear) | |
370 | { | |
371 | u8 reg_int; | |
372 | u8 reg_mode; | |
373 | u16 fan_cap; | |
374 | ||
375 | if (cmp == NPCM7XX_FAN_CMPA) | |
376 | fan_cap = ioread16(NPCM7XX_FAN_REG_TCRA(data->fan_base, fan)); | |
377 | else | |
378 | fan_cap = ioread16(NPCM7XX_FAN_REG_TCRB(data->fan_base, fan)); | |
379 | ||
380 | /* clear capature flag, H/W will auto reset the NPCM7XX_FAN_TCNTx */ | |
381 | iowrite8(flag_clear, NPCM7XX_FAN_REG_TICLR(data->fan_base, fan)); | |
382 | ||
383 | if (data->fan_dev[fan_id].fan_st_flg == FAN_INIT) { | |
384 | /* First capture, drop it */ | |
385 | data->fan_dev[fan_id].fan_st_flg = | |
386 | FAN_PREPARE_TO_GET_FIRST_CAPTURE; | |
387 | ||
388 | /* reset counter */ | |
389 | data->fan_dev[fan_id].fan_cnt_tmp = 0; | |
390 | } else if (data->fan_dev[fan_id].fan_st_flg < FAN_ENOUGH_SAMPLE) { | |
391 | /* | |
392 | * collect the enough sample, | |
393 | * (ex: 2 pulse fan need to get 2 sample) | |
394 | */ | |
395 | data->fan_dev[fan_id].fan_cnt_tmp += | |
396 | (NPCM7XX_FAN_TCNT - fan_cap); | |
397 | ||
398 | data->fan_dev[fan_id].fan_st_flg++; | |
399 | } else { | |
400 | /* get enough sample or fan disable */ | |
401 | if (data->fan_dev[fan_id].fan_st_flg == FAN_ENOUGH_SAMPLE) { | |
402 | data->fan_dev[fan_id].fan_cnt_tmp += | |
403 | (NPCM7XX_FAN_TCNT - fan_cap); | |
404 | ||
405 | /* compute finial average cnt per pulse */ | |
406 | data->fan_dev[fan_id].fan_cnt = | |
407 | data->fan_dev[fan_id].fan_cnt_tmp / | |
408 | FAN_ENOUGH_SAMPLE; | |
409 | ||
410 | data->fan_dev[fan_id].fan_st_flg = FAN_INIT; | |
411 | } | |
412 | ||
413 | reg_int = ioread8(NPCM7XX_FAN_REG_TIEN(data->fan_base, fan)); | |
414 | ||
415 | /* disable interrupt */ | |
416 | iowrite8((reg_int & ~flag_int), | |
417 | NPCM7XX_FAN_REG_TIEN(data->fan_base, fan)); | |
418 | reg_mode = ioread8(NPCM7XX_FAN_REG_TCKC(data->fan_base, fan)); | |
419 | ||
420 | /* stop capturing */ | |
421 | iowrite8((reg_mode & ~flag_mode), | |
422 | NPCM7XX_FAN_REG_TCKC(data->fan_base, fan)); | |
423 | } | |
424 | } | |
425 | ||
426 | static inline void npcm7xx_check_cmp(struct npcm7xx_pwm_fan_data *data, | |
427 | u8 fan, u8 cmp, u8 flag) | |
428 | { | |
429 | u8 reg_int; | |
430 | u8 reg_mode; | |
431 | u8 flag_timeout; | |
432 | u8 flag_cap; | |
433 | u8 flag_clear; | |
434 | u8 flag_int; | |
435 | u8 flag_mode; | |
436 | u8 fan_id; | |
437 | ||
438 | fan_id = NPCM7XX_FAN_INPUT(fan, cmp); | |
439 | ||
440 | if (cmp == NPCM7XX_FAN_CMPA) { | |
441 | flag_cap = NPCM7XX_FAN_TICTRL_TAPND; | |
442 | flag_timeout = NPCM7XX_FAN_TICTRL_TEPND; | |
443 | flag_int = NPCM7XX_FAN_TIEN_TAIEN | NPCM7XX_FAN_TIEN_TEIEN; | |
444 | flag_mode = NPCM7XX_FAN_TCKC_CLK1_APB; | |
445 | flag_clear = NPCM7XX_FAN_TICLR_TACLR | NPCM7XX_FAN_TICLR_TECLR; | |
446 | } else { | |
447 | flag_cap = NPCM7XX_FAN_TICTRL_TBPND; | |
448 | flag_timeout = NPCM7XX_FAN_TICTRL_TFPND; | |
449 | flag_int = NPCM7XX_FAN_TIEN_TBIEN | NPCM7XX_FAN_TIEN_TFIEN; | |
450 | flag_mode = NPCM7XX_FAN_TCKC_CLK2_APB; | |
451 | flag_clear = NPCM7XX_FAN_TICLR_TBCLR | NPCM7XX_FAN_TICLR_TFCLR; | |
452 | } | |
453 | ||
454 | if (flag & flag_timeout) { | |
455 | reg_int = ioread8(NPCM7XX_FAN_REG_TIEN(data->fan_base, fan)); | |
456 | ||
457 | /* disable interrupt */ | |
458 | iowrite8((reg_int & ~flag_int), | |
459 | NPCM7XX_FAN_REG_TIEN(data->fan_base, fan)); | |
460 | ||
461 | /* clear interrupt flag */ | |
462 | iowrite8(flag_clear, | |
463 | NPCM7XX_FAN_REG_TICLR(data->fan_base, fan)); | |
464 | ||
465 | reg_mode = ioread8(NPCM7XX_FAN_REG_TCKC(data->fan_base, fan)); | |
466 | ||
467 | /* stop capturing */ | |
468 | iowrite8((reg_mode & ~flag_mode), | |
469 | NPCM7XX_FAN_REG_TCKC(data->fan_base, fan)); | |
470 | ||
471 | /* | |
472 | * If timeout occurs (NPCM7XX_FAN_TIMEOUT), the fan doesn't | |
473 | * connect or speed is lower than 10.6Hz (320RPM/pulse2). | |
474 | * In these situation, the RPM output should be zero. | |
475 | */ | |
476 | data->fan_dev[fan_id].fan_cnt = 0; | |
477 | } else { | |
478 | /* input capture is occurred */ | |
479 | if (flag & flag_cap) | |
480 | npcm7xx_fan_compute(data, fan, cmp, fan_id, flag_int, | |
481 | flag_mode, flag_clear); | |
482 | } | |
483 | } | |
484 | ||
485 | static irqreturn_t npcm7xx_fan_isr(int irq, void *dev_id) | |
486 | { | |
487 | struct npcm7xx_pwm_fan_data *data = dev_id; | |
488 | unsigned long flags; | |
489 | int module; | |
490 | u8 flag; | |
491 | ||
492 | module = irq - data->fan_irq[0]; | |
493 | spin_lock_irqsave(&data->fan_lock[module], flags); | |
494 | ||
495 | flag = ioread8(NPCM7XX_FAN_REG_TICTRL(data->fan_base, module)); | |
496 | if (flag > 0) { | |
497 | npcm7xx_check_cmp(data, module, NPCM7XX_FAN_CMPA, flag); | |
498 | npcm7xx_check_cmp(data, module, NPCM7XX_FAN_CMPB, flag); | |
499 | spin_unlock_irqrestore(&data->fan_lock[module], flags); | |
500 | return IRQ_HANDLED; | |
501 | } | |
502 | ||
503 | spin_unlock_irqrestore(&data->fan_lock[module], flags); | |
504 | ||
505 | return IRQ_NONE; | |
506 | } | |
507 | ||
508 | static int npcm7xx_read_pwm(struct device *dev, u32 attr, int channel, | |
509 | long *val) | |
510 | { | |
511 | struct npcm7xx_pwm_fan_data *data = dev_get_drvdata(dev); | |
512 | u32 pmw_ch = (channel % NPCM7XX_PWM_MAX_CHN_NUM_IN_A_MODULE); | |
513 | u32 module = (channel / NPCM7XX_PWM_MAX_CHN_NUM_IN_A_MODULE); | |
514 | ||
515 | switch (attr) { | |
516 | case hwmon_pwm_input: | |
517 | *val = ioread32 | |
518 | (NPCM7XX_PWM_REG_CMRx(data->pwm_base, module, pmw_ch)); | |
519 | return 0; | |
520 | default: | |
521 | return -EOPNOTSUPP; | |
522 | } | |
523 | } | |
524 | ||
525 | static int npcm7xx_write_pwm(struct device *dev, u32 attr, int channel, | |
526 | long val) | |
527 | { | |
528 | struct npcm7xx_pwm_fan_data *data = dev_get_drvdata(dev); | |
529 | int err; | |
530 | ||
531 | switch (attr) { | |
532 | case hwmon_pwm_input: | |
533 | if (val < 0 || val > NPCM7XX_PWM_CMR_MAX) | |
534 | return -EINVAL; | |
535 | err = npcm7xx_pwm_config_set(data, channel, (u16)val); | |
536 | break; | |
537 | default: | |
538 | err = -EOPNOTSUPP; | |
539 | break; | |
540 | } | |
541 | ||
542 | return err; | |
543 | } | |
544 | ||
545 | static umode_t npcm7xx_pwm_is_visible(const void *_data, u32 attr, int channel) | |
546 | { | |
547 | const struct npcm7xx_pwm_fan_data *data = _data; | |
548 | ||
89fec128 | 549 | if (!data->pwm_present[channel] || channel >= data->info->pwm_max_channel) |
f1fd4a4d TM |
550 | return 0; |
551 | ||
552 | switch (attr) { | |
553 | case hwmon_pwm_input: | |
554 | return 0644; | |
555 | default: | |
556 | return 0; | |
557 | } | |
558 | } | |
559 | ||
560 | static int npcm7xx_read_fan(struct device *dev, u32 attr, int channel, | |
561 | long *val) | |
562 | { | |
563 | struct npcm7xx_pwm_fan_data *data = dev_get_drvdata(dev); | |
564 | ||
565 | switch (attr) { | |
566 | case hwmon_fan_input: | |
567 | *val = 0; | |
568 | if (data->fan_dev[channel].fan_cnt <= 0) | |
569 | return data->fan_dev[channel].fan_cnt; | |
570 | ||
571 | /* Convert the raw reading to RPM */ | |
572 | if (data->fan_dev[channel].fan_cnt > 0 && | |
573 | data->fan_dev[channel].fan_pls_per_rev > 0) | |
574 | *val = ((data->input_clk_freq * 60) / | |
575 | (data->fan_dev[channel].fan_cnt * | |
576 | data->fan_dev[channel].fan_pls_per_rev)); | |
577 | return 0; | |
578 | default: | |
579 | return -EOPNOTSUPP; | |
580 | } | |
581 | } | |
582 | ||
583 | static umode_t npcm7xx_fan_is_visible(const void *_data, u32 attr, int channel) | |
584 | { | |
585 | const struct npcm7xx_pwm_fan_data *data = _data; | |
586 | ||
587 | if (!data->fan_present[channel]) | |
588 | return 0; | |
589 | ||
590 | switch (attr) { | |
591 | case hwmon_fan_input: | |
592 | return 0444; | |
593 | default: | |
594 | return 0; | |
595 | } | |
596 | } | |
597 | ||
598 | static int npcm7xx_read(struct device *dev, enum hwmon_sensor_types type, | |
599 | u32 attr, int channel, long *val) | |
600 | { | |
601 | switch (type) { | |
602 | case hwmon_pwm: | |
603 | return npcm7xx_read_pwm(dev, attr, channel, val); | |
604 | case hwmon_fan: | |
605 | return npcm7xx_read_fan(dev, attr, channel, val); | |
606 | default: | |
607 | return -EOPNOTSUPP; | |
608 | } | |
609 | } | |
610 | ||
611 | static int npcm7xx_write(struct device *dev, enum hwmon_sensor_types type, | |
612 | u32 attr, int channel, long val) | |
613 | { | |
614 | switch (type) { | |
615 | case hwmon_pwm: | |
616 | return npcm7xx_write_pwm(dev, attr, channel, val); | |
617 | default: | |
618 | return -EOPNOTSUPP; | |
619 | } | |
620 | } | |
621 | ||
622 | static umode_t npcm7xx_is_visible(const void *data, | |
623 | enum hwmon_sensor_types type, | |
624 | u32 attr, int channel) | |
625 | { | |
626 | switch (type) { | |
627 | case hwmon_pwm: | |
628 | return npcm7xx_pwm_is_visible(data, attr, channel); | |
629 | case hwmon_fan: | |
630 | return npcm7xx_fan_is_visible(data, attr, channel); | |
631 | default: | |
632 | return 0; | |
633 | } | |
634 | } | |
635 | ||
ed30302c | 636 | static const struct hwmon_channel_info * const npcm7xx_info[] = { |
dfeace08 GR |
637 | HWMON_CHANNEL_INFO(pwm, |
638 | HWMON_PWM_INPUT, | |
639 | HWMON_PWM_INPUT, | |
640 | HWMON_PWM_INPUT, | |
641 | HWMON_PWM_INPUT, | |
642 | HWMON_PWM_INPUT, | |
643 | HWMON_PWM_INPUT, | |
644 | HWMON_PWM_INPUT, | |
89fec128 TM |
645 | HWMON_PWM_INPUT, |
646 | HWMON_PWM_INPUT, | |
647 | HWMON_PWM_INPUT, | |
648 | HWMON_PWM_INPUT, | |
dfeace08 GR |
649 | HWMON_PWM_INPUT), |
650 | HWMON_CHANNEL_INFO(fan, | |
651 | HWMON_F_INPUT, | |
652 | HWMON_F_INPUT, | |
653 | HWMON_F_INPUT, | |
654 | HWMON_F_INPUT, | |
655 | HWMON_F_INPUT, | |
656 | HWMON_F_INPUT, | |
657 | HWMON_F_INPUT, | |
658 | HWMON_F_INPUT, | |
659 | HWMON_F_INPUT, | |
660 | HWMON_F_INPUT, | |
661 | HWMON_F_INPUT, | |
662 | HWMON_F_INPUT, | |
663 | HWMON_F_INPUT, | |
664 | HWMON_F_INPUT, | |
665 | HWMON_F_INPUT, | |
666 | HWMON_F_INPUT), | |
f1fd4a4d TM |
667 | NULL |
668 | }; | |
669 | ||
670 | static const struct hwmon_ops npcm7xx_hwmon_ops = { | |
671 | .is_visible = npcm7xx_is_visible, | |
672 | .read = npcm7xx_read, | |
673 | .write = npcm7xx_write, | |
674 | }; | |
675 | ||
676 | static const struct hwmon_chip_info npcm7xx_chip_info = { | |
677 | .ops = &npcm7xx_hwmon_ops, | |
678 | .info = npcm7xx_info, | |
679 | }; | |
680 | ||
89fec128 TM |
681 | static const struct npcm_hwmon_info npxm7xx_hwmon_info = { |
682 | .pwm_max_channel = 8, | |
683 | }; | |
684 | ||
685 | static const struct npcm_hwmon_info npxm8xx_hwmon_info = { | |
686 | .pwm_max_channel = 12, | |
687 | }; | |
688 | ||
f1fd4a4d TM |
689 | static u32 npcm7xx_pwm_init(struct npcm7xx_pwm_fan_data *data) |
690 | { | |
691 | int m, ch; | |
692 | u32 prescale_val, output_freq; | |
1d4d6733 | 693 | unsigned long pwm_clk_freq; |
f1fd4a4d | 694 | |
1d4d6733 | 695 | pwm_clk_freq = clk_get_rate(data->pwm_clk); |
f1fd4a4d TM |
696 | |
697 | /* Adjust NPCM7xx PWMs output frequency to ~25Khz */ | |
1d4d6733 | 698 | output_freq = pwm_clk_freq / PWN_CNT_DEFAULT; |
f1fd4a4d TM |
699 | prescale_val = DIV_ROUND_CLOSEST(output_freq, PWM_OUTPUT_FREQ_25KHZ); |
700 | ||
701 | /* If prescale_val = 0, then the prescale output clock is stopped */ | |
702 | if (prescale_val < MIN_PRESCALE1) | |
703 | prescale_val = MIN_PRESCALE1; | |
704 | /* | |
705 | * prescale_val need to decrement in one because in the PWM Prescale | |
706 | * register the Prescale value increment by one | |
707 | */ | |
708 | prescale_val--; | |
709 | ||
710 | /* Setting PWM Prescale Register value register to both modules */ | |
711 | prescale_val |= (prescale_val << NPCM7XX_PWM_PRESCALE_SHIFT_CH01); | |
712 | ||
2539b15d | 713 | for (m = 0; m < data->pwm_modules; m++) { |
f1fd4a4d TM |
714 | iowrite32(prescale_val, NPCM7XX_PWM_REG_PR(data->pwm_base, m)); |
715 | iowrite32(NPCM7XX_PWM_PRESCALE2_DEFAULT, | |
716 | NPCM7XX_PWM_REG_CSR(data->pwm_base, m)); | |
717 | iowrite32(NPCM7XX_PWM_CTRL_MODE_DEFAULT, | |
718 | NPCM7XX_PWM_REG_CR(data->pwm_base, m)); | |
719 | ||
720 | for (ch = 0; ch < NPCM7XX_PWM_MAX_CHN_NUM_IN_A_MODULE; ch++) { | |
721 | iowrite32(NPCM7XX_PWM_COUNTER_DEFAULT_NUM, | |
722 | NPCM7XX_PWM_REG_CNRx(data->pwm_base, m, ch)); | |
723 | } | |
724 | } | |
725 | ||
726 | return output_freq / ((prescale_val & 0xf) + 1); | |
727 | } | |
728 | ||
729 | static void npcm7xx_fan_init(struct npcm7xx_pwm_fan_data *data) | |
730 | { | |
731 | int md; | |
732 | int ch; | |
733 | int i; | |
734 | u32 apb_clk_freq; | |
735 | ||
736 | for (md = 0; md < NPCM7XX_FAN_MAX_MODULE; md++) { | |
737 | /* stop FAN0~7 clock */ | |
738 | iowrite8(NPCM7XX_FAN_TCKC_CLKX_NONE, | |
739 | NPCM7XX_FAN_REG_TCKC(data->fan_base, md)); | |
740 | ||
741 | /* disable all interrupt */ | |
742 | iowrite8(0x00, NPCM7XX_FAN_REG_TIEN(data->fan_base, md)); | |
743 | ||
744 | /* clear all interrupt */ | |
745 | iowrite8(NPCM7XX_FAN_TICLR_CLEAR_ALL, | |
746 | NPCM7XX_FAN_REG_TICLR(data->fan_base, md)); | |
747 | ||
748 | /* set FAN0~7 clock prescaler */ | |
749 | iowrite8(NPCM7XX_FAN_CLK_PRESCALE, | |
750 | NPCM7XX_FAN_REG_TPRSC(data->fan_base, md)); | |
751 | ||
752 | /* set FAN0~7 mode (high-to-low transition) */ | |
753 | iowrite8((NPCM7XX_FAN_TMCTRL_MODE_5 | NPCM7XX_FAN_TMCTRL_TBEN | | |
754 | NPCM7XX_FAN_TMCTRL_TAEN), | |
755 | NPCM7XX_FAN_REG_TMCTRL(data->fan_base, md)); | |
756 | ||
757 | /* set FAN0~7 Initial Count/Cap */ | |
758 | iowrite16(NPCM7XX_FAN_TCNT, | |
759 | NPCM7XX_FAN_REG_TCNT1(data->fan_base, md)); | |
760 | iowrite16(NPCM7XX_FAN_TCNT, | |
761 | NPCM7XX_FAN_REG_TCNT2(data->fan_base, md)); | |
762 | ||
763 | /* set FAN0~7 compare (equal to count) */ | |
764 | iowrite8((NPCM7XX_FAN_TCPCFG_EQAEN | NPCM7XX_FAN_TCPCFG_EQBEN), | |
765 | NPCM7XX_FAN_REG_TCPCFG(data->fan_base, md)); | |
766 | ||
767 | /* set FAN0~7 compare value */ | |
768 | iowrite16(NPCM7XX_FAN_TCPA, | |
769 | NPCM7XX_FAN_REG_TCPA(data->fan_base, md)); | |
770 | iowrite16(NPCM7XX_FAN_TCPB, | |
771 | NPCM7XX_FAN_REG_TCPB(data->fan_base, md)); | |
772 | ||
773 | /* set FAN0~7 fan input FANIN 0~15 */ | |
774 | iowrite8(NPCM7XX_FAN_TINASEL_FANIN_DEFAULT, | |
775 | NPCM7XX_FAN_REG_TINASEL(data->fan_base, md)); | |
776 | iowrite8(NPCM7XX_FAN_TINASEL_FANIN_DEFAULT, | |
777 | NPCM7XX_FAN_REG_TINBSEL(data->fan_base, md)); | |
778 | ||
779 | for (i = 0; i < NPCM7XX_FAN_MAX_CHN_NUM_IN_A_MODULE; i++) { | |
780 | ch = md * NPCM7XX_FAN_MAX_CHN_NUM_IN_A_MODULE + i; | |
781 | data->fan_dev[ch].fan_st_flg = FAN_DISABLE; | |
782 | data->fan_dev[ch].fan_pls_per_rev = | |
783 | NPCM7XX_FAN_DEFAULT_PULSE_PER_REVOLUTION; | |
784 | data->fan_dev[ch].fan_cnt = 0; | |
785 | } | |
786 | } | |
787 | ||
788 | apb_clk_freq = clk_get_rate(data->fan_clk); | |
789 | ||
790 | /* Fan tach input clock = APB clock / prescalar, default is 255. */ | |
791 | data->input_clk_freq = apb_clk_freq / (NPCM7XX_FAN_CLK_PRESCALE + 1); | |
792 | } | |
793 | ||
794 | static int | |
795 | npcm7xx_pwm_cz_get_max_state(struct thermal_cooling_device *tcdev, | |
796 | unsigned long *state) | |
797 | { | |
798 | struct npcm7xx_cooling_device *cdev = tcdev->devdata; | |
799 | ||
800 | *state = cdev->max_state; | |
801 | ||
802 | return 0; | |
803 | } | |
804 | ||
805 | static int | |
806 | npcm7xx_pwm_cz_get_cur_state(struct thermal_cooling_device *tcdev, | |
807 | unsigned long *state) | |
808 | { | |
809 | struct npcm7xx_cooling_device *cdev = tcdev->devdata; | |
810 | ||
811 | *state = cdev->cur_state; | |
812 | ||
813 | return 0; | |
814 | } | |
815 | ||
816 | static int | |
817 | npcm7xx_pwm_cz_set_cur_state(struct thermal_cooling_device *tcdev, | |
818 | unsigned long state) | |
819 | { | |
820 | struct npcm7xx_cooling_device *cdev = tcdev->devdata; | |
821 | int ret; | |
822 | ||
823 | if (state > cdev->max_state) | |
824 | return -EINVAL; | |
825 | ||
826 | cdev->cur_state = state; | |
827 | ret = npcm7xx_pwm_config_set(cdev->data, cdev->pwm_port, | |
828 | cdev->cooling_levels[cdev->cur_state]); | |
829 | ||
830 | return ret; | |
831 | } | |
832 | ||
833 | static const struct thermal_cooling_device_ops npcm7xx_pwm_cool_ops = { | |
834 | .get_max_state = npcm7xx_pwm_cz_get_max_state, | |
835 | .get_cur_state = npcm7xx_pwm_cz_get_cur_state, | |
836 | .set_cur_state = npcm7xx_pwm_cz_set_cur_state, | |
837 | }; | |
838 | ||
839 | static int npcm7xx_create_pwm_cooling(struct device *dev, | |
840 | struct device_node *child, | |
841 | struct npcm7xx_pwm_fan_data *data, | |
842 | u32 pwm_port, u8 num_levels) | |
843 | { | |
844 | int ret; | |
845 | struct npcm7xx_cooling_device *cdev; | |
846 | ||
847 | cdev = devm_kzalloc(dev, sizeof(*cdev), GFP_KERNEL); | |
848 | if (!cdev) | |
849 | return -ENOMEM; | |
850 | ||
851 | cdev->cooling_levels = devm_kzalloc(dev, num_levels, GFP_KERNEL); | |
852 | if (!cdev->cooling_levels) | |
853 | return -ENOMEM; | |
854 | ||
855 | cdev->max_state = num_levels - 1; | |
856 | ret = of_property_read_u8_array(child, "cooling-levels", | |
857 | cdev->cooling_levels, | |
858 | num_levels); | |
859 | if (ret) { | |
860 | dev_err(dev, "Property 'cooling-levels' cannot be read.\n"); | |
861 | return ret; | |
862 | } | |
0debe4d0 | 863 | snprintf(cdev->name, THERMAL_NAME_LENGTH, "%pOFn%d", child, |
f1fd4a4d TM |
864 | pwm_port); |
865 | ||
0b2a785d GR |
866 | cdev->tcdev = devm_thermal_of_cooling_device_register(dev, child, |
867 | cdev->name, cdev, &npcm7xx_pwm_cool_ops); | |
f1fd4a4d TM |
868 | if (IS_ERR(cdev->tcdev)) |
869 | return PTR_ERR(cdev->tcdev); | |
870 | ||
871 | cdev->data = data; | |
872 | cdev->pwm_port = pwm_port; | |
873 | ||
874 | data->cdev[pwm_port] = cdev; | |
875 | ||
876 | return 0; | |
877 | } | |
878 | ||
879 | static int npcm7xx_en_pwm_fan(struct device *dev, | |
880 | struct device_node *child, | |
881 | struct npcm7xx_pwm_fan_data *data) | |
882 | { | |
883 | u8 *fan_ch; | |
884 | u32 pwm_port; | |
885 | int ret, fan_cnt; | |
886 | u8 index, ch; | |
887 | ||
888 | ret = of_property_read_u32(child, "reg", &pwm_port); | |
889 | if (ret) | |
890 | return ret; | |
891 | ||
892 | data->pwm_present[pwm_port] = true; | |
893 | ret = npcm7xx_pwm_config_set(data, pwm_port, | |
894 | NPCM7XX_PWM_CMR_DEFAULT_NUM); | |
b92b2984 SH |
895 | if (ret) |
896 | return ret; | |
f1fd4a4d TM |
897 | |
898 | ret = of_property_count_u8_elems(child, "cooling-levels"); | |
899 | if (ret > 0) { | |
900 | ret = npcm7xx_create_pwm_cooling(dev, child, data, pwm_port, | |
901 | ret); | |
902 | if (ret) | |
903 | return ret; | |
904 | } | |
905 | ||
906 | fan_cnt = of_property_count_u8_elems(child, "fan-tach-ch"); | |
907 | if (fan_cnt < 1) | |
908 | return -EINVAL; | |
909 | ||
329e0989 | 910 | fan_ch = devm_kcalloc(dev, fan_cnt, sizeof(*fan_ch), GFP_KERNEL); |
f1fd4a4d TM |
911 | if (!fan_ch) |
912 | return -ENOMEM; | |
913 | ||
914 | ret = of_property_read_u8_array(child, "fan-tach-ch", fan_ch, fan_cnt); | |
915 | if (ret) | |
916 | return ret; | |
917 | ||
918 | for (ch = 0; ch < fan_cnt; ch++) { | |
919 | index = fan_ch[ch]; | |
920 | data->fan_present[index] = true; | |
921 | data->fan_dev[index].fan_st_flg = FAN_INIT; | |
922 | } | |
923 | ||
924 | return 0; | |
925 | } | |
926 | ||
927 | static int npcm7xx_pwm_fan_probe(struct platform_device *pdev) | |
928 | { | |
929 | struct device *dev = &pdev->dev; | |
930 | struct device_node *np, *child; | |
931 | struct npcm7xx_pwm_fan_data *data; | |
932 | struct resource *res; | |
933 | struct device *hwmon; | |
934 | char name[20]; | |
935 | int ret, cnt; | |
936 | u32 output_freq; | |
937 | u32 i; | |
938 | ||
939 | np = dev->of_node; | |
940 | ||
941 | data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); | |
942 | if (!data) | |
943 | return -ENOMEM; | |
944 | ||
89fec128 TM |
945 | data->info = device_get_match_data(dev); |
946 | if (!data->info) | |
947 | return -EINVAL; | |
948 | ||
2539b15d GR |
949 | data->pwm_modules = data->info->pwm_max_channel / NPCM7XX_PWM_MAX_CHN_NUM_IN_A_MODULE; |
950 | ||
f1fd4a4d TM |
951 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pwm"); |
952 | if (!res) { | |
953 | dev_err(dev, "pwm resource not found\n"); | |
954 | return -ENODEV; | |
955 | } | |
956 | ||
957 | data->pwm_base = devm_ioremap_resource(dev, res); | |
958 | dev_dbg(dev, "pwm base resource is %pR\n", res); | |
959 | if (IS_ERR(data->pwm_base)) | |
960 | return PTR_ERR(data->pwm_base); | |
961 | ||
962 | data->pwm_clk = devm_clk_get(dev, "pwm"); | |
963 | if (IS_ERR(data->pwm_clk)) { | |
964 | dev_err(dev, "couldn't get pwm clock\n"); | |
965 | return PTR_ERR(data->pwm_clk); | |
966 | } | |
967 | ||
968 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "fan"); | |
969 | if (!res) { | |
970 | dev_err(dev, "fan resource not found\n"); | |
971 | return -ENODEV; | |
972 | } | |
973 | ||
974 | data->fan_base = devm_ioremap_resource(dev, res); | |
975 | dev_dbg(dev, "fan base resource is %pR\n", res); | |
976 | if (IS_ERR(data->fan_base)) | |
977 | return PTR_ERR(data->fan_base); | |
978 | ||
979 | data->fan_clk = devm_clk_get(dev, "fan"); | |
980 | if (IS_ERR(data->fan_clk)) { | |
981 | dev_err(dev, "couldn't get fan clock\n"); | |
982 | return PTR_ERR(data->fan_clk); | |
983 | } | |
984 | ||
985 | output_freq = npcm7xx_pwm_init(data); | |
986 | npcm7xx_fan_init(data); | |
987 | ||
2539b15d | 988 | for (cnt = 0; cnt < data->pwm_modules; cnt++) |
f1fd4a4d TM |
989 | mutex_init(&data->pwm_lock[cnt]); |
990 | ||
991 | for (i = 0; i < NPCM7XX_FAN_MAX_MODULE; i++) { | |
992 | spin_lock_init(&data->fan_lock[i]); | |
993 | ||
994 | data->fan_irq[i] = platform_get_irq(pdev, i); | |
f2ff7cea | 995 | if (data->fan_irq[i] < 0) |
f1fd4a4d | 996 | return data->fan_irq[i]; |
f1fd4a4d TM |
997 | |
998 | sprintf(name, "NPCM7XX-FAN-MD%d", i); | |
999 | ret = devm_request_irq(dev, data->fan_irq[i], npcm7xx_fan_isr, | |
1000 | 0, name, (void *)data); | |
1001 | if (ret) { | |
1002 | dev_err(dev, "register IRQ fan%d failed\n", i); | |
1003 | return ret; | |
1004 | } | |
1005 | } | |
1006 | ||
1007 | for_each_child_of_node(np, child) { | |
1008 | ret = npcm7xx_en_pwm_fan(dev, child, data); | |
1009 | if (ret) { | |
1010 | dev_err(dev, "enable pwm and fan failed\n"); | |
1011 | of_node_put(child); | |
1012 | return ret; | |
1013 | } | |
1014 | } | |
1015 | ||
1016 | hwmon = devm_hwmon_device_register_with_info(dev, "npcm7xx_pwm_fan", | |
1017 | data, &npcm7xx_chip_info, | |
1018 | NULL); | |
1019 | if (IS_ERR(hwmon)) { | |
1020 | dev_err(dev, "unable to register hwmon device\n"); | |
1021 | return PTR_ERR(hwmon); | |
1022 | } | |
1023 | ||
1024 | for (i = 0; i < NPCM7XX_FAN_MAX_CHN_NUM; i++) { | |
1025 | if (data->fan_present[i]) { | |
1026 | /* fan timer initialization */ | |
1027 | data->fan_timer.expires = jiffies + | |
1028 | msecs_to_jiffies(NPCM7XX_FAN_POLL_TIMER_200MS); | |
1029 | timer_setup(&data->fan_timer, | |
1030 | npcm7xx_fan_polling, 0); | |
1031 | add_timer(&data->fan_timer); | |
1032 | break; | |
1033 | } | |
1034 | } | |
1035 | ||
1036 | pr_info("NPCM7XX PWM-FAN Driver probed, output Freq %dHz[PWM], input Freq %dHz[FAN]\n", | |
1037 | output_freq, data->input_clk_freq); | |
1038 | ||
1039 | return 0; | |
1040 | } | |
1041 | ||
1042 | static const struct of_device_id of_pwm_fan_match_table[] = { | |
89fec128 TM |
1043 | { .compatible = "nuvoton,npcm750-pwm-fan", .data = &npxm7xx_hwmon_info}, |
1044 | { .compatible = "nuvoton,npcm845-pwm-fan", .data = &npxm8xx_hwmon_info}, | |
f1fd4a4d TM |
1045 | {}, |
1046 | }; | |
1047 | MODULE_DEVICE_TABLE(of, of_pwm_fan_match_table); | |
1048 | ||
1049 | static struct platform_driver npcm7xx_pwm_fan_driver = { | |
1050 | .probe = npcm7xx_pwm_fan_probe, | |
1051 | .driver = { | |
1052 | .name = "npcm7xx_pwm_fan", | |
1053 | .of_match_table = of_pwm_fan_match_table, | |
1054 | }, | |
1055 | }; | |
1056 | ||
1057 | module_platform_driver(npcm7xx_pwm_fan_driver); | |
1058 | ||
1059 | MODULE_DESCRIPTION("Nuvoton NPCM7XX PWM and Fan Tacho driver"); | |
1060 | MODULE_AUTHOR("Tomer Maimon <tomer.maimon@nuvoton.com>"); | |
1061 | MODULE_LICENSE("GPL v2"); |