1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun #include <net/mac80211.h>
3*4882a593Smuzhiyun #include <linux/bcma/bcma_driver_chipcommon.h>
4*4882a593Smuzhiyun #include <linux/gpio/driver.h>
5*4882a593Smuzhiyun #include <linux/gpio/machine.h>
6*4882a593Smuzhiyun #include <linux/gpio/consumer.h>
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include "mac80211_if.h"
9*4882a593Smuzhiyun #include "pub.h"
10*4882a593Smuzhiyun #include "main.h"
11*4882a593Smuzhiyun #include "led.h"
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun /* number of leds */
14*4882a593Smuzhiyun #define BRCMS_LED_NO 4
15*4882a593Smuzhiyun /* behavior mask */
16*4882a593Smuzhiyun #define BRCMS_LED_BEH_MASK 0x7f
17*4882a593Smuzhiyun /* activelow (polarity) bit */
18*4882a593Smuzhiyun #define BRCMS_LED_AL_MASK 0x80
19*4882a593Smuzhiyun /* radio enabled */
20*4882a593Smuzhiyun #define BRCMS_LED_RADIO 3
21*4882a593Smuzhiyun
brcms_radio_led_ctrl(struct brcms_info * wl,bool state)22*4882a593Smuzhiyun static void brcms_radio_led_ctrl(struct brcms_info *wl, bool state)
23*4882a593Smuzhiyun {
24*4882a593Smuzhiyun if (!wl->radio_led.gpiod)
25*4882a593Smuzhiyun return;
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun if (state)
28*4882a593Smuzhiyun gpiod_set_value(wl->radio_led.gpiod, 1);
29*4882a593Smuzhiyun else
30*4882a593Smuzhiyun gpiod_set_value(wl->radio_led.gpiod, 0);
31*4882a593Smuzhiyun }
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun /* Callback from the LED subsystem. */
brcms_led_brightness_set(struct led_classdev * led_dev,enum led_brightness brightness)35*4882a593Smuzhiyun static void brcms_led_brightness_set(struct led_classdev *led_dev,
36*4882a593Smuzhiyun enum led_brightness brightness)
37*4882a593Smuzhiyun {
38*4882a593Smuzhiyun struct brcms_info *wl = container_of(led_dev,
39*4882a593Smuzhiyun struct brcms_info, led_dev);
40*4882a593Smuzhiyun brcms_radio_led_ctrl(wl, brightness);
41*4882a593Smuzhiyun }
42*4882a593Smuzhiyun
brcms_led_unregister(struct brcms_info * wl)43*4882a593Smuzhiyun void brcms_led_unregister(struct brcms_info *wl)
44*4882a593Smuzhiyun {
45*4882a593Smuzhiyun if (wl->led_dev.dev)
46*4882a593Smuzhiyun led_classdev_unregister(&wl->led_dev);
47*4882a593Smuzhiyun if (wl->radio_led.gpiod)
48*4882a593Smuzhiyun gpiochip_free_own_desc(wl->radio_led.gpiod);
49*4882a593Smuzhiyun }
50*4882a593Smuzhiyun
brcms_led_register(struct brcms_info * wl)51*4882a593Smuzhiyun int brcms_led_register(struct brcms_info *wl)
52*4882a593Smuzhiyun {
53*4882a593Smuzhiyun int i, err;
54*4882a593Smuzhiyun struct brcms_led *radio_led = &wl->radio_led;
55*4882a593Smuzhiyun /* get CC core */
56*4882a593Smuzhiyun struct bcma_drv_cc *cc_drv = &wl->wlc->hw->d11core->bus->drv_cc;
57*4882a593Smuzhiyun struct gpio_chip *bcma_gpio = &cc_drv->gpio;
58*4882a593Smuzhiyun struct ssb_sprom *sprom = &wl->wlc->hw->d11core->bus->sprom;
59*4882a593Smuzhiyun u8 *leds[] = { &sprom->gpio0,
60*4882a593Smuzhiyun &sprom->gpio1,
61*4882a593Smuzhiyun &sprom->gpio2,
62*4882a593Smuzhiyun &sprom->gpio3 };
63*4882a593Smuzhiyun int hwnum = -1;
64*4882a593Smuzhiyun enum gpio_lookup_flags lflags = GPIO_ACTIVE_HIGH;
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun if (!bcma_gpio || !gpio_is_valid(bcma_gpio->base))
67*4882a593Smuzhiyun return -ENODEV;
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun /* find radio enabled LED */
70*4882a593Smuzhiyun for (i = 0; i < BRCMS_LED_NO; i++) {
71*4882a593Smuzhiyun u8 led = *leds[i];
72*4882a593Smuzhiyun if ((led & BRCMS_LED_BEH_MASK) == BRCMS_LED_RADIO) {
73*4882a593Smuzhiyun hwnum = i;
74*4882a593Smuzhiyun if (led & BRCMS_LED_AL_MASK)
75*4882a593Smuzhiyun lflags = GPIO_ACTIVE_LOW;
76*4882a593Smuzhiyun break;
77*4882a593Smuzhiyun }
78*4882a593Smuzhiyun }
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun /* No LED, bail out */
81*4882a593Smuzhiyun if (hwnum == -1)
82*4882a593Smuzhiyun return -ENODEV;
83*4882a593Smuzhiyun
84*4882a593Smuzhiyun /* Try to obtain this LED GPIO line */
85*4882a593Smuzhiyun radio_led->gpiod = gpiochip_request_own_desc(bcma_gpio, hwnum,
86*4882a593Smuzhiyun "radio on", lflags,
87*4882a593Smuzhiyun GPIOD_OUT_LOW);
88*4882a593Smuzhiyun
89*4882a593Smuzhiyun if (IS_ERR(radio_led->gpiod)) {
90*4882a593Smuzhiyun err = PTR_ERR(radio_led->gpiod);
91*4882a593Smuzhiyun wiphy_err(wl->wiphy, "requesting led GPIO failed (err: %d)\n",
92*4882a593Smuzhiyun err);
93*4882a593Smuzhiyun return err;
94*4882a593Smuzhiyun }
95*4882a593Smuzhiyun
96*4882a593Smuzhiyun snprintf(wl->radio_led.name, sizeof(wl->radio_led.name),
97*4882a593Smuzhiyun "brcmsmac-%s:radio", wiphy_name(wl->wiphy));
98*4882a593Smuzhiyun
99*4882a593Smuzhiyun wl->led_dev.name = wl->radio_led.name;
100*4882a593Smuzhiyun wl->led_dev.default_trigger =
101*4882a593Smuzhiyun ieee80211_get_radio_led_name(wl->pub->ieee_hw);
102*4882a593Smuzhiyun wl->led_dev.brightness_set = brcms_led_brightness_set;
103*4882a593Smuzhiyun err = led_classdev_register(wiphy_dev(wl->wiphy), &wl->led_dev);
104*4882a593Smuzhiyun
105*4882a593Smuzhiyun if (err) {
106*4882a593Smuzhiyun wiphy_err(wl->wiphy, "cannot register led device: %s (err: %d)\n",
107*4882a593Smuzhiyun wl->radio_led.name, err);
108*4882a593Smuzhiyun return err;
109*4882a593Smuzhiyun }
110*4882a593Smuzhiyun
111*4882a593Smuzhiyun wiphy_info(wl->wiphy, "registered radio enabled led device: %s\n",
112*4882a593Smuzhiyun wl->radio_led.name);
113*4882a593Smuzhiyun
114*4882a593Smuzhiyun return 0;
115*4882a593Smuzhiyun }
116