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[93.42.71.18]) by smtp.googlemail.com with ESMTPSA id u2-20020adff882000000b00241d21d4652sm4163549wrp.21.2022.12.14.15.55.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Dec 2022 15:55:23 -0800 (PST) From: Christian Marangi To: Andrew Lunn , Florian Fainelli , Vladimir Oltean , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Jonathan Corbet , Pavel Machek , Christian Marangi , "Russell King (Oracle)" , John Crispin , netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-leds@vger.kernel.org, Tim Harvey , Alexander Stein , Rasmus Villemoes Subject: [PATCH v7 10/11] net: dsa: qca8k: add LEDs support Date: Thu, 15 Dec 2022 00:54:37 +0100 Message-Id: <20221214235438.30271-11-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20221214235438.30271-1-ansuelsmth@gmail.com> References: <20221214235438.30271-1-ansuelsmth@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org Add LEDs support for qca8k Switch Family. This will provide the LEDs hardware API to permit the PHY LED to support hardware mode. Each port have at least 3 LEDs and they can HW blink, set on/off or follow blink modes configured with the LED in hardware mode. Adds support for leds netdev trigger to support hardware triggers. Signed-off-by: Christian Marangi --- drivers/net/dsa/qca/Kconfig | 9 + drivers/net/dsa/qca/Makefile | 1 + drivers/net/dsa/qca/qca8k-8xxx.c | 4 + drivers/net/dsa/qca/qca8k-leds.c | 406 +++++++++++++++++++++++++++++++ drivers/net/dsa/qca/qca8k.h | 62 +++++ 5 files changed, 482 insertions(+) create mode 100644 drivers/net/dsa/qca/qca8k-leds.c diff --git a/drivers/net/dsa/qca/Kconfig b/drivers/net/dsa/qca/Kconfig index ba339747362c..be67164a444e 100644 --- a/drivers/net/dsa/qca/Kconfig +++ b/drivers/net/dsa/qca/Kconfig @@ -15,3 +15,12 @@ config NET_DSA_QCA8K help This enables support for the Qualcomm Atheros QCA8K Ethernet switch chips. + +config NET_DSA_QCA8K_LEDS_SUPPORT + tristate "Qualcomm Atheros QCA8K Ethernet switch family LEDs support" + depends on NET_DSA_QCA8K + select LEDS_OFFLOAD_TRIGGERS + help + This enabled support for LEDs present on the Qualcomm Atheros + QCA8K Ethernet switch chips. This require the LEDs offload + triggers support as it can run in offload mode. diff --git a/drivers/net/dsa/qca/Makefile b/drivers/net/dsa/qca/Makefile index 701f1d199e93..330ae389e489 100644 --- a/drivers/net/dsa/qca/Makefile +++ b/drivers/net/dsa/qca/Makefile @@ -2,3 +2,4 @@ obj-$(CONFIG_NET_DSA_AR9331) += ar9331.o obj-$(CONFIG_NET_DSA_QCA8K) += qca8k.o qca8k-y += qca8k-common.o qca8k-8xxx.o +obj-$(CONFIG_NET_DSA_QCA8K_LEDS_SUPPORT) += qca8k-leds.o diff --git a/drivers/net/dsa/qca/qca8k-8xxx.c b/drivers/net/dsa/qca/qca8k-8xxx.c index c5c3b4e92f28..90916d8d8afe 100644 --- a/drivers/net/dsa/qca/qca8k-8xxx.c +++ b/drivers/net/dsa/qca/qca8k-8xxx.c @@ -1690,6 +1690,10 @@ qca8k_setup(struct dsa_switch *ds) if (ret) return ret; + ret = qca8k_setup_led_ctrl(priv); + if (ret) + return ret; + qca8k_setup_pcs(priv, &priv->pcs_port_0, 0); qca8k_setup_pcs(priv, &priv->pcs_port_6, 6); diff --git a/drivers/net/dsa/qca/qca8k-leds.c b/drivers/net/dsa/qca/qca8k-leds.c new file mode 100644 index 000000000000..b51cdcae31b2 --- /dev/null +++ b/drivers/net/dsa/qca/qca8k-leds.c @@ -0,0 +1,406 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include + +#include "qca8k.h" + +static int +qca8k_get_enable_led_reg(int port_num, int led_num, struct qca8k_led_pattern_en *reg_info) +{ + int shift; + + switch (port_num) { + case 0: + reg_info->reg = QCA8K_LED_CTRL_REG(led_num); + reg_info->shift = 14; + break; + case 1: + case 2: + case 3: + reg_info->reg = QCA8K_LED_CTRL_REG(3); + shift = 2 * led_num + (6 * (port_num - 1)); + + reg_info->shift = 8 + shift; + + break; + case 4: + reg_info->reg = QCA8K_LED_CTRL_REG(led_num); + reg_info->shift = 30; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int +qca8k_get_control_led_reg(int port_num, int led_num, struct qca8k_led_pattern_en *reg_info) +{ + reg_info->reg = QCA8K_LED_CTRL_REG(led_num); + + /* 6 total control rule: + * 3 control rules for phy0-3 that applies to all their leds + * 3 control rules for phy4 + */ + if (port_num == 4) + reg_info->shift = 16; + else + reg_info->shift = 0; + + return 0; +} + +static int +qca8k_parse_netdev(unsigned long rules, u32 *offload_trigger, u32 *mask) +{ + /* Parsing specific to netdev trigger */ + if (test_bit(TRIGGER_NETDEV_LINK, &rules)) + *offload_trigger = QCA8K_LED_LINK_10M_EN_MASK | + QCA8K_LED_LINK_100M_EN_MASK | + QCA8K_LED_LINK_1000M_EN_MASK; + if (test_bit(TRIGGER_NETDEV_LINK_10, &rules)) + *offload_trigger = QCA8K_LED_LINK_10M_EN_MASK; + if (test_bit(TRIGGER_NETDEV_LINK_100, &rules)) + *offload_trigger = QCA8K_LED_LINK_100M_EN_MASK; + if (test_bit(TRIGGER_NETDEV_LINK_1000, &rules)) + *offload_trigger = QCA8K_LED_LINK_1000M_EN_MASK; + if (test_bit(TRIGGER_NETDEV_HALF_DUPLEX, &rules)) + *offload_trigger = QCA8K_LED_HALF_DUPLEX_MASK; + if (test_bit(TRIGGER_NETDEV_FULL_DUPLEX, &rules)) + *offload_trigger = QCA8K_LED_FULL_DUPLEX_MASK; + if (test_bit(TRIGGER_NETDEV_TX, &rules)) + *offload_trigger = QCA8K_LED_TX_BLINK_MASK; + if (test_bit(TRIGGER_NETDEV_RX, &rules)) + *offload_trigger = QCA8K_LED_RX_BLINK_MASK; + if (test_bit(TRIGGER_NETDEV_BLINK_2HZ, &rules)) + *offload_trigger = QCA8K_LED_BLINK_2HZ; + if (test_bit(TRIGGER_NETDEV_BLINK_4HZ, &rules)) + *offload_trigger = QCA8K_LED_BLINK_4HZ; + if (test_bit(TRIGGER_NETDEV_BLINK_8HZ, &rules)) + *offload_trigger = QCA8K_LED_BLINK_8HZ; + + if (!*offload_trigger) + return -EOPNOTSUPP; + + if (test_bit(TRIGGER_NETDEV_BLINK_2HZ, &rules) || + test_bit(TRIGGER_NETDEV_BLINK_4HZ, &rules) || + test_bit(TRIGGER_NETDEV_BLINK_8HZ, &rules)) { + *mask = QCA8K_LED_BLINK_FREQ_MASK; + } else { + *mask = *offload_trigger; + } + + return 0; +} + +static int +qca8k_cled_hw_control_configure(struct led_classdev *ldev, unsigned long rules, + enum blink_mode_cmd cmd) +{ + struct qca8k_led *led = container_of(ldev, struct qca8k_led, cdev); + struct led_trigger *trigger = ldev->trigger; + struct qca8k_led_pattern_en reg_info; + struct qca8k_priv *priv = led->priv; + u32 offload_trigger = 0, mask, val; + int ret; + + /* Check trigger compatibility */ + if (strcmp(trigger->name, "netdev")) + return -EOPNOTSUPP; + + if (!strcmp(trigger->name, "netdev")) + ret = qca8k_parse_netdev(rules, &offload_trigger, &mask); + + if (ret) + return ret; + + qca8k_get_control_led_reg(led->port_num, led->led_num, ®_info); + + switch (cmd) { + case BLINK_MODE_SUPPORTED: + /* We reach this point, we are sure the trigger is supported */ + return 1; + case BLINK_MODE_ZERO: + /* We set 4hz by default */ + u32 default_reg = QCA8K_LED_BLINK_4HZ; + + ret = regmap_update_bits(priv->regmap, reg_info.reg, + QCA8K_LED_RULE_MASK << reg_info.shift, + default_reg << reg_info.shift); + break; + case BLINK_MODE_ENABLE: + ret = regmap_update_bits(priv->regmap, reg_info.reg, + mask << reg_info.shift, + offload_trigger << reg_info.shift); + break; + case BLINK_MODE_DISABLE: + ret = regmap_update_bits(priv->regmap, reg_info.reg, + mask << reg_info.shift, + 0); + break; + case BLINK_MODE_READ: + ret = regmap_read(priv->regmap, reg_info.reg, &val); + if (ret) + return ret; + + val >>= reg_info.shift; + val &= offload_trigger; + + /* Special handling for LED_BLINK_2HZ */ + if (!val && offload_trigger == QCA8K_LED_BLINK_2HZ) + val = 1; + + return val; + default: + return -EOPNOTSUPP; + } + + return ret; +} + +static void +qca8k_led_brightness_set(struct qca8k_led *led, + enum led_brightness b) +{ + struct qca8k_led_pattern_en reg_info; + struct qca8k_priv *priv = led->priv; + u32 val = QCA8K_LED_ALWAYS_OFF; + + qca8k_get_enable_led_reg(led->port_num, led->led_num, ®_info); + + if (b) + val = QCA8K_LED_ALWAYS_ON; + + regmap_update_bits(priv->regmap, reg_info.reg, + GENMASK(1, 0) << reg_info.shift, + val << reg_info.shift); +} + +static void +qca8k_cled_brightness_set(struct led_classdev *ldev, + enum led_brightness b) +{ + struct qca8k_led *led = container_of(ldev, struct qca8k_led, cdev); + + return qca8k_led_brightness_set(led, b); +} + +static enum led_brightness +qca8k_led_brightness_get(struct qca8k_led *led) +{ + struct qca8k_led_pattern_en reg_info; + struct qca8k_priv *priv = led->priv; + u32 val; + int ret; + + qca8k_get_enable_led_reg(led->port_num, led->led_num, ®_info); + + ret = regmap_read(priv->regmap, reg_info.reg, &val); + if (ret) + return 0; + + val >>= reg_info.shift; + val &= GENMASK(1, 0); + + return val > 0 ? 1 : 0; +} + +static enum led_brightness +qca8k_cled_brightness_get(struct led_classdev *ldev) +{ + struct qca8k_led *led = container_of(ldev, struct qca8k_led, cdev); + + return qca8k_led_brightness_get(led); +} + +static int +qca8k_cled_blink_set(struct led_classdev *ldev, + unsigned long *delay_on, + unsigned long *delay_off) +{ + struct qca8k_led *led = container_of(ldev, struct qca8k_led, cdev); + struct qca8k_led_pattern_en reg_info; + struct qca8k_priv *priv = led->priv; + + if (*delay_on == 0 && *delay_off == 0) { + *delay_on = 125; + *delay_off = 125; + } + + if (*delay_on != 125 || *delay_off != 125) { + /* The hardware only supports blinking at 4Hz. Fall back + * to software implementation in other cases. + */ + return -EINVAL; + } + + qca8k_get_enable_led_reg(led->port_num, led->led_num, ®_info); + + regmap_update_bits(priv->regmap, reg_info.reg, + GENMASK(1, 0) << reg_info.shift, + QCA8K_LED_ALWAYS_BLINK_4HZ << reg_info.shift); + + return 0; +} + +static int +qca8k_cled_trigger_offload(struct led_classdev *ldev, bool enable) +{ + struct qca8k_led *led = container_of(ldev, struct qca8k_led, cdev); + + struct qca8k_led_pattern_en reg_info; + struct qca8k_priv *priv = led->priv; + u32 val = QCA8K_LED_ALWAYS_OFF; + + qca8k_get_enable_led_reg(led->port_num, led->led_num, ®_info); + + if (enable) + val = QCA8K_LED_RULE_CONTROLLED; + + return regmap_update_bits(priv->regmap, reg_info.reg, + GENMASK(1, 0) << reg_info.shift, + val << reg_info.shift); +} + +static int +qca8k_cled_hw_control_start(struct led_classdev *led_cdev) +{ + return qca8k_cled_trigger_offload(led_cdev, true); +} + +static int +qca8k_cled_hw_control_stop(struct led_classdev *led_cdev) +{ + return qca8k_cled_trigger_offload(led_cdev, false); +} + +static bool +qca8k_cled_hw_control_status(struct led_classdev *ldev) +{ + struct qca8k_led *led = container_of(ldev, struct qca8k_led, cdev); + + struct qca8k_led_pattern_en reg_info; + struct qca8k_priv *priv = led->priv; + u32 val; + + qca8k_get_enable_led_reg(led->port_num, led->led_num, ®_info); + + regmap_read(priv->regmap, reg_info.reg, &val); + + val >>= reg_info.shift; + val &= GENMASK(1, 0); + + return val == QCA8K_LED_RULE_CONTROLLED; +} + +static int +qca8k_parse_port_leds(struct qca8k_priv *priv, struct fwnode_handle *port, int port_num) +{ + struct fwnode_handle *led = NULL, *leds = NULL; + struct led_init_data init_data = { }; + struct qca8k_led *port_led; + int led_num, port_index; + const char *state; + int ret; + + leds = fwnode_get_named_child_node(port, "leds"); + if (!leds) { + dev_dbg(priv->dev, "No Leds node specified in device tree for port %d!\n", + port_num); + return 0; + } + + fwnode_for_each_child_node(leds, led) { + /* Reg represent the led number of the port. + * Each port can have at least 3 leds attached + * Commonly: + * 1. is gigabit led + * 2. is mbit led + * 3. additional status led + */ + if (fwnode_property_read_u32(led, "reg", &led_num)) + continue; + + if (led_num >= QCA8K_LED_PORT_COUNT) { + dev_warn(priv->dev, "Invalid LED reg defined %d", port_num); + continue; + } + + port_index = 3 * port_num + led_num; + + port_led = &priv->ports_led[port_index]; + port_led->port_num = port_num; + port_led->led_num = led_num; + port_led->priv = priv; + + ret = fwnode_property_read_string(led, "default-state", &state); + if (!ret) { + if (!strcmp(state, "on")) { + port_led->cdev.brightness = 1; + qca8k_led_brightness_set(port_led, 1); + } else if (!strcmp(state, "off")) { + port_led->cdev.brightness = 0; + qca8k_led_brightness_set(port_led, 0); + } else if (!strcmp(state, "keep")) { + port_led->cdev.brightness = + qca8k_led_brightness_get(port_led); + } + } + + /* 3 brightness settings can be applied from Documentation: + * 0 always off + * 1 blink at 4Hz + * 2 always on + * 3 rule controlled + * Suppots only 2 mode: (pcb limitation, with always on and blink + * only the last led is set to this mode) + * 0 always off (sets all leds off) + * 3 rule controlled + */ + port_led->cdev.blink_mode = SOFTWARE_HARDWARE_CONTROLLED; + port_led->cdev.max_brightness = 1; + port_led->cdev.brightness_set = qca8k_cled_brightness_set; + port_led->cdev.brightness_get = qca8k_cled_brightness_get; + port_led->cdev.blink_set = qca8k_cled_blink_set; + port_led->cdev.hw_control_start = qca8k_cled_hw_control_start; + port_led->cdev.hw_control_stop = qca8k_cled_hw_control_stop; + port_led->cdev.hw_control_status = qca8k_cled_hw_control_status; + port_led->cdev.hw_control_configure = qca8k_cled_hw_control_configure; + init_data.default_label = ":port"; + init_data.devicename = "qca8k"; + init_data.fwnode = led; + + ret = devm_led_classdev_register_ext(priv->dev, &port_led->cdev, &init_data); + if (ret) + dev_warn(priv->dev, "Failed to int led"); + } + + return 0; +} + +int +qca8k_setup_led_ctrl(struct qca8k_priv *priv) +{ + struct fwnode_handle *mdio, *port; + int port_num; + int ret; + + mdio = device_get_named_child_node(priv->dev, "mdio"); + if (!mdio) { + dev_info(priv->dev, "No MDIO node specified in device tree!\n"); + return 0; + } + + fwnode_for_each_child_node(mdio, port) { + if (fwnode_property_read_u32(port, "reg", &port_num)) + continue; + + /* Each port can have at least 3 different leds attached */ + ret = qca8k_parse_port_leds(priv, port, port_num); + if (ret) + return ret; + } + + return 0; +} diff --git a/drivers/net/dsa/qca/qca8k.h b/drivers/net/dsa/qca/qca8k.h index 0b7a5cb12321..5c535baa7139 100644 --- a/drivers/net/dsa/qca/qca8k.h +++ b/drivers/net/dsa/qca/qca8k.h @@ -11,6 +11,7 @@ #include #include #include +#include #include #define QCA8K_ETHERNET_MDIO_PRIORITY 7 @@ -85,6 +86,43 @@ #define QCA8K_MDIO_MASTER_DATA(x) FIELD_PREP(QCA8K_MDIO_MASTER_DATA_MASK, x) #define QCA8K_MDIO_MASTER_MAX_PORTS 5 #define QCA8K_MDIO_MASTER_MAX_REG 32 + +/* LED control register */ +#define QCA8K_LED_COUNT 15 +#define QCA8K_LED_PORT_COUNT 3 +#define QCA8K_LED_RULE_COUNT 6 +#define QCA8K_LED_RULE_MAX 11 +#define QCA8K_LED_CTRL_REG(_i) (0x050 + (_i) * 4) +#define QCA8K_LED_CTRL0_REG 0x50 +#define QCA8K_LED_CTRL1_REG 0x54 +#define QCA8K_LED_CTRL2_REG 0x58 +#define QCA8K_LED_CTRL3_REG 0x5C +#define QCA8K_LED_CTRL_SHIFT(_i) (((_i) % 2) * 16) +#define QCA8K_LED_CTRL_MASK GENMASK(15, 0) +#define QCA8K_LED_RULE_MASK GENMASK(13, 0) +#define QCA8K_LED_BLINK_FREQ_MASK GENMASK(1, 0) +#define QCA8K_LED_BLINK_FREQ_SHITF 0 +#define QCA8K_LED_BLINK_2HZ 0 +#define QCA8K_LED_BLINK_4HZ 1 +#define QCA8K_LED_BLINK_8HZ 2 +#define QCA8K_LED_BLINK_AUTO 3 +#define QCA8K_LED_LINKUP_OVER_MASK BIT(2) +#define QCA8K_LED_TX_BLINK_MASK BIT(4) +#define QCA8K_LED_RX_BLINK_MASK BIT(5) +#define QCA8K_LED_COL_BLINK_MASK BIT(7) +#define QCA8K_LED_LINK_10M_EN_MASK BIT(8) +#define QCA8K_LED_LINK_100M_EN_MASK BIT(9) +#define QCA8K_LED_LINK_1000M_EN_MASK BIT(10) +#define QCA8K_LED_POWER_ON_LIGHT_MASK BIT(11) +#define QCA8K_LED_HALF_DUPLEX_MASK BIT(12) +#define QCA8K_LED_FULL_DUPLEX_MASK BIT(13) +#define QCA8K_LED_PATTERN_EN_MASK GENMASK(15, 14) +#define QCA8K_LED_PATTERN_EN_SHIFT 14 +#define QCA8K_LED_ALWAYS_OFF 0 +#define QCA8K_LED_ALWAYS_BLINK_4HZ 1 +#define QCA8K_LED_ALWAYS_ON 2 +#define QCA8K_LED_RULE_CONTROLLED 3 + #define QCA8K_GOL_MAC_ADDR0 0x60 #define QCA8K_GOL_MAC_ADDR1 0x64 #define QCA8K_MAX_FRAME_SIZE 0x78 @@ -388,6 +426,19 @@ struct qca8k_pcs { int port; }; +struct qca8k_led_pattern_en { + u32 reg; + u8 shift; +}; + +struct qca8k_led { + u8 port_num; + u8 led_num; + u16 old_rule; + struct qca8k_priv *priv; + struct led_classdev cdev; +}; + struct qca8k_priv { u8 switch_id; u8 switch_revision; @@ -412,6 +463,7 @@ struct qca8k_priv { struct qca8k_pcs pcs_port_0; struct qca8k_pcs pcs_port_6; const struct qca8k_match_data *info; + struct qca8k_led ports_led[QCA8K_LED_COUNT]; }; struct qca8k_mib_desc { @@ -517,4 +569,14 @@ int qca8k_port_lag_join(struct dsa_switch *ds, int port, struct dsa_lag lag, int qca8k_port_lag_leave(struct dsa_switch *ds, int port, struct dsa_lag lag); +/* Leds Support function */ +#ifdef CONFIG_NET_DSA_QCA8K_LEDS_SUPPORT +int qca8k_setup_led_ctrl(struct qca8k_priv *priv); +#else +static inline int qca8k_setup_led_ctrl(struct qca8k_priv *priv) +{ + return 0; +} +#endif + #endif /* __QCA8K_H */