^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Windfarm PowerMac thermal control. SMU based controls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * (c) Copyright 2005 Benjamin Herrenschmidt, IBM Corp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * <benh@kernel.crashing.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/wait.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/completion.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <asm/prom.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <asm/machdep.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <asm/sections.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <asm/smu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include "windfarm.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define VERSION "0.4"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #undef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #ifdef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define DBG(args...) printk(args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define DBG(args...) do { } while(0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static int smu_supports_new_fans_ops = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * SMU fans control object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) static LIST_HEAD(smu_fans);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) struct smu_fan_control {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) struct list_head link;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) int fan_type; /* 0 = rpm, 1 = pwm */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) u32 reg; /* index in SMU */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) s32 value; /* current value */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) s32 min, max; /* min/max values */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) struct wf_control ctrl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define to_smu_fan(c) container_of(c, struct smu_fan_control, ctrl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static int smu_set_fan(int pwm, u8 id, u16 value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) struct smu_cmd cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) u8 buffer[16];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) DECLARE_COMPLETION_ONSTACK(comp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) /* Fill SMU command structure */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) cmd.cmd = SMU_CMD_FAN_COMMAND;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) /* The SMU has an "old" and a "new" way of setting the fan speed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) * Unfortunately, I found no reliable way to know which one works
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) * on a given machine model. After some investigations it appears
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * that MacOS X just tries the new one, and if it fails fallbacks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) * to the old ones ... Ugh.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) retry:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) if (smu_supports_new_fans_ops) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) buffer[0] = 0x30;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) buffer[1] = id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) *((u16 *)(&buffer[2])) = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) cmd.data_len = 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) if (id > 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) /* Fill argument buffer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) memset(buffer, 0, 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) buffer[0] = pwm ? 0x10 : 0x00;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) buffer[1] = 0x01 << id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) *((u16 *)&buffer[2 + id * 2]) = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) cmd.data_len = 14;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) cmd.reply_len = 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) cmd.data_buf = cmd.reply_buf = buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) cmd.status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) cmd.done = smu_done_complete;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) cmd.misc = ∁
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) rc = smu_queue_cmd(&cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) wait_for_completion(&comp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) /* Handle fallback (see coment above) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) if (cmd.status != 0 && smu_supports_new_fans_ops) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) printk(KERN_WARNING "windfarm: SMU failed new fan command "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) "falling back to old method\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) smu_supports_new_fans_ops = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) goto retry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) return cmd.status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) static void smu_fan_release(struct wf_control *ct)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) struct smu_fan_control *fct = to_smu_fan(ct);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) kfree(fct);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) static int smu_fan_set(struct wf_control *ct, s32 value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) struct smu_fan_control *fct = to_smu_fan(ct);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) if (value < fct->min)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) value = fct->min;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (value > fct->max)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) value = fct->max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) fct->value = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) return smu_set_fan(fct->fan_type, fct->reg, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) static int smu_fan_get(struct wf_control *ct, s32 *value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) struct smu_fan_control *fct = to_smu_fan(ct);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) *value = fct->value; /* todo: read from SMU */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) static s32 smu_fan_min(struct wf_control *ct)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) struct smu_fan_control *fct = to_smu_fan(ct);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) return fct->min;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) static s32 smu_fan_max(struct wf_control *ct)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) struct smu_fan_control *fct = to_smu_fan(ct);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) return fct->max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) static const struct wf_control_ops smu_fan_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) .set_value = smu_fan_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) .get_value = smu_fan_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) .get_min = smu_fan_min,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) .get_max = smu_fan_max,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) .release = smu_fan_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) static struct smu_fan_control *smu_fan_create(struct device_node *node,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) int pwm_fan)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) struct smu_fan_control *fct;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) const s32 *v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) const u32 *reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) const char *l;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) fct = kmalloc(sizeof(struct smu_fan_control), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) if (fct == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) fct->ctrl.ops = &smu_fan_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) l = of_get_property(node, "location", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) if (l == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) fct->fan_type = pwm_fan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) fct->ctrl.type = pwm_fan ? WF_CONTROL_PWM_FAN : WF_CONTROL_RPM_FAN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) /* We use the name & location here the same way we do for SMU sensors,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) * see the comment in windfarm_smu_sensors.c. The locations are a bit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) * less consistent here between the iMac and the desktop models, but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) * that is good enough for our needs for now at least.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) * One problem though is that Apple seem to be inconsistent with case
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) * and the kernel doesn't have strcasecmp =P
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) fct->ctrl.name = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) /* Names used on desktop models */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) if (!strcmp(l, "Rear Fan 0") || !strcmp(l, "Rear Fan") ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) !strcmp(l, "Rear fan 0") || !strcmp(l, "Rear fan") ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) !strcmp(l, "CPU A EXHAUST"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) fct->ctrl.name = "cpu-rear-fan-0";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) else if (!strcmp(l, "Rear Fan 1") || !strcmp(l, "Rear fan 1") ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) !strcmp(l, "CPU B EXHAUST"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) fct->ctrl.name = "cpu-rear-fan-1";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) else if (!strcmp(l, "Front Fan 0") || !strcmp(l, "Front Fan") ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) !strcmp(l, "Front fan 0") || !strcmp(l, "Front fan") ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) !strcmp(l, "CPU A INTAKE"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) fct->ctrl.name = "cpu-front-fan-0";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) else if (!strcmp(l, "Front Fan 1") || !strcmp(l, "Front fan 1") ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) !strcmp(l, "CPU B INTAKE"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) fct->ctrl.name = "cpu-front-fan-1";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) else if (!strcmp(l, "CPU A PUMP"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) fct->ctrl.name = "cpu-pump-0";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) else if (!strcmp(l, "CPU B PUMP"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) fct->ctrl.name = "cpu-pump-1";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) else if (!strcmp(l, "Slots Fan") || !strcmp(l, "Slots fan") ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) !strcmp(l, "EXPANSION SLOTS INTAKE"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) fct->ctrl.name = "slots-fan";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) else if (!strcmp(l, "Drive Bay") || !strcmp(l, "Drive bay") ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) !strcmp(l, "DRIVE BAY A INTAKE"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) fct->ctrl.name = "drive-bay-fan";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) else if (!strcmp(l, "BACKSIDE"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) fct->ctrl.name = "backside-fan";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) /* Names used on iMac models */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) if (!strcmp(l, "System Fan") || !strcmp(l, "System fan"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) fct->ctrl.name = "system-fan";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) else if (!strcmp(l, "CPU Fan") || !strcmp(l, "CPU fan"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) fct->ctrl.name = "cpu-fan";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) else if (!strcmp(l, "Hard Drive") || !strcmp(l, "Hard drive"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) fct->ctrl.name = "drive-bay-fan";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) else if (!strcmp(l, "HDD Fan")) /* seen on iMac G5 iSight */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) fct->ctrl.name = "hard-drive-fan";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) else if (!strcmp(l, "ODD Fan")) /* same */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) fct->ctrl.name = "optical-drive-fan";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) /* Unrecognized fan, bail out */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) if (fct->ctrl.name == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) /* Get min & max values*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) v = of_get_property(node, "min-value", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) if (v == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) fct->min = *v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) v = of_get_property(node, "max-value", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) if (v == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) fct->max = *v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) /* Get "reg" value */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) reg = of_get_property(node, "reg", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) if (reg == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) fct->reg = *reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) if (wf_register_control(&fct->ctrl))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) return fct;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) kfree(fct);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) static int __init smu_controls_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) struct device_node *smu, *fans, *fan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) if (!smu_present())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) smu = of_find_node_by_type(NULL, "smu");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) if (smu == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) /* Look for RPM fans */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) for (fans = NULL; (fans = of_get_next_child(smu, fans)) != NULL;)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) if (of_node_name_eq(fans, "rpm-fans") ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) of_device_is_compatible(fans, "smu-rpm-fans"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) for (fan = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) fans && (fan = of_get_next_child(fans, fan)) != NULL;) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) struct smu_fan_control *fct;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) fct = smu_fan_create(fan, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) if (fct == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) printk(KERN_WARNING "windfarm: Failed to create SMU "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) "RPM fan %pOFn\n", fan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) list_add(&fct->link, &smu_fans);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) of_node_put(fans);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) /* Look for PWM fans */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) for (fans = NULL; (fans = of_get_next_child(smu, fans)) != NULL;)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) if (of_node_name_eq(fans, "pwm-fans"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) for (fan = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) fans && (fan = of_get_next_child(fans, fan)) != NULL;) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) struct smu_fan_control *fct;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) fct = smu_fan_create(fan, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) if (fct == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) printk(KERN_WARNING "windfarm: Failed to create SMU "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) "PWM fan %pOFn\n", fan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) list_add(&fct->link, &smu_fans);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) of_node_put(fans);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) of_node_put(smu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) static void __exit smu_controls_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) struct smu_fan_control *fct;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) while (!list_empty(&smu_fans)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) fct = list_entry(smu_fans.next, struct smu_fan_control, link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) list_del(&fct->link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) wf_unregister_control(&fct->ctrl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) module_init(smu_controls_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) module_exit(smu_controls_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) MODULE_AUTHOR("Benjamin Herrenschmidt <benh@kernel.crashing.org>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) MODULE_DESCRIPTION("SMU control objects for PowerMacs thermal control");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327)
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags