122094814SBjorn Andersson // SPDX-License-Identifier: GPL-2.0 222094814SBjorn Andersson /* 322094814SBjorn Andersson * Copyright (c) 2019, Linaro Ltd 422094814SBjorn Andersson */ 522094814SBjorn Andersson #include <dt-bindings/power/qcom-aoss-qmp.h> 622094814SBjorn Andersson #include <linux/clk-provider.h> 722094814SBjorn Andersson #include <linux/interrupt.h> 822094814SBjorn Andersson #include <linux/io.h> 922094814SBjorn Andersson #include <linux/mailbox_client.h> 1022094814SBjorn Andersson #include <linux/module.h> 1122094814SBjorn Andersson #include <linux/platform_device.h> 1222094814SBjorn Andersson #include <linux/pm_domain.h> 1305589b30SThara Gopinath #include <linux/thermal.h> 1405589b30SThara Gopinath #include <linux/slab.h> 1522094814SBjorn Andersson 1622094814SBjorn Andersson #define QMP_DESC_MAGIC 0x0 1722094814SBjorn Andersson #define QMP_DESC_VERSION 0x4 1822094814SBjorn Andersson #define QMP_DESC_FEATURES 0x8 1922094814SBjorn Andersson 2022094814SBjorn Andersson /* AOP-side offsets */ 2122094814SBjorn Andersson #define QMP_DESC_UCORE_LINK_STATE 0xc 2222094814SBjorn Andersson #define QMP_DESC_UCORE_LINK_STATE_ACK 0x10 2322094814SBjorn Andersson #define QMP_DESC_UCORE_CH_STATE 0x14 2422094814SBjorn Andersson #define QMP_DESC_UCORE_CH_STATE_ACK 0x18 2522094814SBjorn Andersson #define QMP_DESC_UCORE_MBOX_SIZE 0x1c 2622094814SBjorn Andersson #define QMP_DESC_UCORE_MBOX_OFFSET 0x20 2722094814SBjorn Andersson 2822094814SBjorn Andersson /* Linux-side offsets */ 2922094814SBjorn Andersson #define QMP_DESC_MCORE_LINK_STATE 0x24 3022094814SBjorn Andersson #define QMP_DESC_MCORE_LINK_STATE_ACK 0x28 3122094814SBjorn Andersson #define QMP_DESC_MCORE_CH_STATE 0x2c 3222094814SBjorn Andersson #define QMP_DESC_MCORE_CH_STATE_ACK 0x30 3322094814SBjorn Andersson #define QMP_DESC_MCORE_MBOX_SIZE 0x34 3422094814SBjorn Andersson #define QMP_DESC_MCORE_MBOX_OFFSET 0x38 3522094814SBjorn Andersson 3622094814SBjorn Andersson #define QMP_STATE_UP GENMASK(15, 0) 3722094814SBjorn Andersson #define QMP_STATE_DOWN GENMASK(31, 16) 3822094814SBjorn Andersson 3922094814SBjorn Andersson #define QMP_MAGIC 0x4d41494c /* mail */ 4022094814SBjorn Andersson #define QMP_VERSION 1 4122094814SBjorn Andersson 4222094814SBjorn Andersson /* 64 bytes is enough to store the requests and provides padding to 4 bytes */ 4322094814SBjorn Andersson #define QMP_MSG_LEN 64 4422094814SBjorn Andersson 4505589b30SThara Gopinath #define QMP_NUM_COOLING_RESOURCES 2 4605589b30SThara Gopinath 47c55b5c66SThara Gopinath static bool qmp_cdev_max_state = 1; 4805589b30SThara Gopinath 4905589b30SThara Gopinath struct qmp_cooling_device { 5005589b30SThara Gopinath struct thermal_cooling_device *cdev; 5105589b30SThara Gopinath struct qmp *qmp; 5205589b30SThara Gopinath char *name; 5305589b30SThara Gopinath bool state; 5405589b30SThara Gopinath }; 5505589b30SThara Gopinath 5622094814SBjorn Andersson /** 5722094814SBjorn Andersson * struct qmp - driver state for QMP implementation 5822094814SBjorn Andersson * @msgram: iomem referencing the message RAM used for communication 5922094814SBjorn Andersson * @dev: reference to QMP device 6022094814SBjorn Andersson * @mbox_client: mailbox client used to ring the doorbell on transmit 6122094814SBjorn Andersson * @mbox_chan: mailbox channel used to ring the doorbell on transmit 6222094814SBjorn Andersson * @offset: offset within @msgram where messages should be written 6322094814SBjorn Andersson * @size: maximum size of the messages to be transmitted 6422094814SBjorn Andersson * @event: wait_queue for synchronization with the IRQ 6522094814SBjorn Andersson * @tx_lock: provides synchronization between multiple callers of qmp_send() 6622094814SBjorn Andersson * @qdss_clk: QDSS clock hw struct 6722094814SBjorn Andersson * @pd_data: genpd data 6896ec310dSLee Jones * @cooling_devs: thermal cooling devices 6922094814SBjorn Andersson */ 7022094814SBjorn Andersson struct qmp { 7122094814SBjorn Andersson void __iomem *msgram; 7222094814SBjorn Andersson struct device *dev; 7322094814SBjorn Andersson 7422094814SBjorn Andersson struct mbox_client mbox_client; 7522094814SBjorn Andersson struct mbox_chan *mbox_chan; 7622094814SBjorn Andersson 7722094814SBjorn Andersson size_t offset; 7822094814SBjorn Andersson size_t size; 7922094814SBjorn Andersson 8022094814SBjorn Andersson wait_queue_head_t event; 8122094814SBjorn Andersson 8222094814SBjorn Andersson struct mutex tx_lock; 8322094814SBjorn Andersson 8422094814SBjorn Andersson struct clk_hw qdss_clk; 8522094814SBjorn Andersson struct genpd_onecell_data pd_data; 8605589b30SThara Gopinath struct qmp_cooling_device *cooling_devs; 8722094814SBjorn Andersson }; 8822094814SBjorn Andersson 8922094814SBjorn Andersson struct qmp_pd { 9022094814SBjorn Andersson struct qmp *qmp; 9122094814SBjorn Andersson struct generic_pm_domain pd; 9222094814SBjorn Andersson }; 9322094814SBjorn Andersson 9422094814SBjorn Andersson #define to_qmp_pd_resource(res) container_of(res, struct qmp_pd, pd) 9522094814SBjorn Andersson 9622094814SBjorn Andersson static void qmp_kick(struct qmp *qmp) 9722094814SBjorn Andersson { 9822094814SBjorn Andersson mbox_send_message(qmp->mbox_chan, NULL); 9922094814SBjorn Andersson mbox_client_txdone(qmp->mbox_chan, 0); 10022094814SBjorn Andersson } 10122094814SBjorn Andersson 10222094814SBjorn Andersson static bool qmp_magic_valid(struct qmp *qmp) 10322094814SBjorn Andersson { 10422094814SBjorn Andersson return readl(qmp->msgram + QMP_DESC_MAGIC) == QMP_MAGIC; 10522094814SBjorn Andersson } 10622094814SBjorn Andersson 10722094814SBjorn Andersson static bool qmp_link_acked(struct qmp *qmp) 10822094814SBjorn Andersson { 10922094814SBjorn Andersson return readl(qmp->msgram + QMP_DESC_MCORE_LINK_STATE_ACK) == QMP_STATE_UP; 11022094814SBjorn Andersson } 11122094814SBjorn Andersson 11222094814SBjorn Andersson static bool qmp_mcore_channel_acked(struct qmp *qmp) 11322094814SBjorn Andersson { 11422094814SBjorn Andersson return readl(qmp->msgram + QMP_DESC_MCORE_CH_STATE_ACK) == QMP_STATE_UP; 11522094814SBjorn Andersson } 11622094814SBjorn Andersson 11722094814SBjorn Andersson static bool qmp_ucore_channel_up(struct qmp *qmp) 11822094814SBjorn Andersson { 11922094814SBjorn Andersson return readl(qmp->msgram + QMP_DESC_UCORE_CH_STATE) == QMP_STATE_UP; 12022094814SBjorn Andersson } 12122094814SBjorn Andersson 12222094814SBjorn Andersson static int qmp_open(struct qmp *qmp) 12322094814SBjorn Andersson { 12422094814SBjorn Andersson int ret; 12522094814SBjorn Andersson u32 val; 12622094814SBjorn Andersson 12722094814SBjorn Andersson if (!qmp_magic_valid(qmp)) { 12822094814SBjorn Andersson dev_err(qmp->dev, "QMP magic doesn't match\n"); 12922094814SBjorn Andersson return -EINVAL; 13022094814SBjorn Andersson } 13122094814SBjorn Andersson 13222094814SBjorn Andersson val = readl(qmp->msgram + QMP_DESC_VERSION); 13322094814SBjorn Andersson if (val != QMP_VERSION) { 13422094814SBjorn Andersson dev_err(qmp->dev, "unsupported QMP version %d\n", val); 13522094814SBjorn Andersson return -EINVAL; 13622094814SBjorn Andersson } 13722094814SBjorn Andersson 13822094814SBjorn Andersson qmp->offset = readl(qmp->msgram + QMP_DESC_MCORE_MBOX_OFFSET); 13922094814SBjorn Andersson qmp->size = readl(qmp->msgram + QMP_DESC_MCORE_MBOX_SIZE); 14022094814SBjorn Andersson if (!qmp->size) { 14122094814SBjorn Andersson dev_err(qmp->dev, "invalid mailbox size\n"); 14222094814SBjorn Andersson return -EINVAL; 14322094814SBjorn Andersson } 14422094814SBjorn Andersson 14522094814SBjorn Andersson /* Ack remote core's link state */ 14622094814SBjorn Andersson val = readl(qmp->msgram + QMP_DESC_UCORE_LINK_STATE); 14722094814SBjorn Andersson writel(val, qmp->msgram + QMP_DESC_UCORE_LINK_STATE_ACK); 14822094814SBjorn Andersson 14922094814SBjorn Andersson /* Set local core's link state to up */ 15022094814SBjorn Andersson writel(QMP_STATE_UP, qmp->msgram + QMP_DESC_MCORE_LINK_STATE); 15122094814SBjorn Andersson 15222094814SBjorn Andersson qmp_kick(qmp); 15322094814SBjorn Andersson 15422094814SBjorn Andersson ret = wait_event_timeout(qmp->event, qmp_link_acked(qmp), HZ); 15522094814SBjorn Andersson if (!ret) { 15622094814SBjorn Andersson dev_err(qmp->dev, "ucore didn't ack link\n"); 15722094814SBjorn Andersson goto timeout_close_link; 15822094814SBjorn Andersson } 15922094814SBjorn Andersson 16022094814SBjorn Andersson writel(QMP_STATE_UP, qmp->msgram + QMP_DESC_MCORE_CH_STATE); 16122094814SBjorn Andersson 16222094814SBjorn Andersson qmp_kick(qmp); 16322094814SBjorn Andersson 16422094814SBjorn Andersson ret = wait_event_timeout(qmp->event, qmp_ucore_channel_up(qmp), HZ); 16522094814SBjorn Andersson if (!ret) { 16622094814SBjorn Andersson dev_err(qmp->dev, "ucore didn't open channel\n"); 16722094814SBjorn Andersson goto timeout_close_channel; 16822094814SBjorn Andersson } 16922094814SBjorn Andersson 17022094814SBjorn Andersson /* Ack remote core's channel state */ 17122094814SBjorn Andersson writel(QMP_STATE_UP, qmp->msgram + QMP_DESC_UCORE_CH_STATE_ACK); 17222094814SBjorn Andersson 17322094814SBjorn Andersson qmp_kick(qmp); 17422094814SBjorn Andersson 17522094814SBjorn Andersson ret = wait_event_timeout(qmp->event, qmp_mcore_channel_acked(qmp), HZ); 17622094814SBjorn Andersson if (!ret) { 17722094814SBjorn Andersson dev_err(qmp->dev, "ucore didn't ack channel\n"); 17822094814SBjorn Andersson goto timeout_close_channel; 17922094814SBjorn Andersson } 18022094814SBjorn Andersson 18122094814SBjorn Andersson return 0; 18222094814SBjorn Andersson 18322094814SBjorn Andersson timeout_close_channel: 18422094814SBjorn Andersson writel(QMP_STATE_DOWN, qmp->msgram + QMP_DESC_MCORE_CH_STATE); 18522094814SBjorn Andersson 18622094814SBjorn Andersson timeout_close_link: 18722094814SBjorn Andersson writel(QMP_STATE_DOWN, qmp->msgram + QMP_DESC_MCORE_LINK_STATE); 18822094814SBjorn Andersson qmp_kick(qmp); 18922094814SBjorn Andersson 19022094814SBjorn Andersson return -ETIMEDOUT; 19122094814SBjorn Andersson } 19222094814SBjorn Andersson 19322094814SBjorn Andersson static void qmp_close(struct qmp *qmp) 19422094814SBjorn Andersson { 19522094814SBjorn Andersson writel(QMP_STATE_DOWN, qmp->msgram + QMP_DESC_MCORE_CH_STATE); 19622094814SBjorn Andersson writel(QMP_STATE_DOWN, qmp->msgram + QMP_DESC_MCORE_LINK_STATE); 19722094814SBjorn Andersson qmp_kick(qmp); 19822094814SBjorn Andersson } 19922094814SBjorn Andersson 20022094814SBjorn Andersson static irqreturn_t qmp_intr(int irq, void *data) 20122094814SBjorn Andersson { 20222094814SBjorn Andersson struct qmp *qmp = data; 20322094814SBjorn Andersson 204df636eeaSArun Kumar Neelakantam wake_up_all(&qmp->event); 20522094814SBjorn Andersson 20622094814SBjorn Andersson return IRQ_HANDLED; 20722094814SBjorn Andersson } 20822094814SBjorn Andersson 20922094814SBjorn Andersson static bool qmp_message_empty(struct qmp *qmp) 21022094814SBjorn Andersson { 21122094814SBjorn Andersson return readl(qmp->msgram + qmp->offset) == 0; 21222094814SBjorn Andersson } 21322094814SBjorn Andersson 21422094814SBjorn Andersson /** 21522094814SBjorn Andersson * qmp_send() - send a message to the AOSS 21622094814SBjorn Andersson * @qmp: qmp context 21722094814SBjorn Andersson * @data: message to be sent 21822094814SBjorn Andersson * @len: length of the message 21922094814SBjorn Andersson * 22022094814SBjorn Andersson * Transmit @data to AOSS and wait for the AOSS to acknowledge the message. 22122094814SBjorn Andersson * @len must be a multiple of 4 and not longer than the mailbox size. Access is 22222094814SBjorn Andersson * synchronized by this implementation. 22322094814SBjorn Andersson * 22422094814SBjorn Andersson * Return: 0 on success, negative errno on failure 22522094814SBjorn Andersson */ 22622094814SBjorn Andersson static int qmp_send(struct qmp *qmp, const void *data, size_t len) 22722094814SBjorn Andersson { 22822094814SBjorn Andersson long time_left; 22922094814SBjorn Andersson int ret; 23022094814SBjorn Andersson 23122094814SBjorn Andersson if (WARN_ON(len + sizeof(u32) > qmp->size)) 23222094814SBjorn Andersson return -EINVAL; 23322094814SBjorn Andersson 23422094814SBjorn Andersson if (WARN_ON(len % sizeof(u32))) 23522094814SBjorn Andersson return -EINVAL; 23622094814SBjorn Andersson 23722094814SBjorn Andersson mutex_lock(&qmp->tx_lock); 23822094814SBjorn Andersson 23922094814SBjorn Andersson /* The message RAM only implements 32-bit accesses */ 24022094814SBjorn Andersson __iowrite32_copy(qmp->msgram + qmp->offset + sizeof(u32), 24122094814SBjorn Andersson data, len / sizeof(u32)); 24222094814SBjorn Andersson writel(len, qmp->msgram + qmp->offset); 24389e7eddeSArun Kumar Neelakantam 24489e7eddeSArun Kumar Neelakantam /* Read back len to confirm data written in message RAM */ 24554f8ebdaSLee Jones readl(qmp->msgram + qmp->offset); 24622094814SBjorn Andersson qmp_kick(qmp); 24722094814SBjorn Andersson 24822094814SBjorn Andersson time_left = wait_event_interruptible_timeout(qmp->event, 24922094814SBjorn Andersson qmp_message_empty(qmp), HZ); 25022094814SBjorn Andersson if (!time_left) { 25122094814SBjorn Andersson dev_err(qmp->dev, "ucore did not ack channel\n"); 25222094814SBjorn Andersson ret = -ETIMEDOUT; 25322094814SBjorn Andersson 25422094814SBjorn Andersson /* Clear message from buffer */ 25522094814SBjorn Andersson writel(0, qmp->msgram + qmp->offset); 25622094814SBjorn Andersson } else { 25722094814SBjorn Andersson ret = 0; 25822094814SBjorn Andersson } 25922094814SBjorn Andersson 26022094814SBjorn Andersson mutex_unlock(&qmp->tx_lock); 26122094814SBjorn Andersson 26222094814SBjorn Andersson return ret; 26322094814SBjorn Andersson } 26422094814SBjorn Andersson 26522094814SBjorn Andersson static int qmp_qdss_clk_prepare(struct clk_hw *hw) 26622094814SBjorn Andersson { 26722094814SBjorn Andersson static const char buf[QMP_MSG_LEN] = "{class: clock, res: qdss, val: 1}"; 26822094814SBjorn Andersson struct qmp *qmp = container_of(hw, struct qmp, qdss_clk); 26922094814SBjorn Andersson 27022094814SBjorn Andersson return qmp_send(qmp, buf, sizeof(buf)); 27122094814SBjorn Andersson } 27222094814SBjorn Andersson 27322094814SBjorn Andersson static void qmp_qdss_clk_unprepare(struct clk_hw *hw) 27422094814SBjorn Andersson { 27522094814SBjorn Andersson static const char buf[QMP_MSG_LEN] = "{class: clock, res: qdss, val: 0}"; 27622094814SBjorn Andersson struct qmp *qmp = container_of(hw, struct qmp, qdss_clk); 27722094814SBjorn Andersson 27822094814SBjorn Andersson qmp_send(qmp, buf, sizeof(buf)); 27922094814SBjorn Andersson } 28022094814SBjorn Andersson 28122094814SBjorn Andersson static const struct clk_ops qmp_qdss_clk_ops = { 28222094814SBjorn Andersson .prepare = qmp_qdss_clk_prepare, 28322094814SBjorn Andersson .unprepare = qmp_qdss_clk_unprepare, 28422094814SBjorn Andersson }; 28522094814SBjorn Andersson 28622094814SBjorn Andersson static int qmp_qdss_clk_add(struct qmp *qmp) 28722094814SBjorn Andersson { 28822094814SBjorn Andersson static const struct clk_init_data qdss_init = { 28922094814SBjorn Andersson .ops = &qmp_qdss_clk_ops, 29022094814SBjorn Andersson .name = "qdss", 29122094814SBjorn Andersson }; 29222094814SBjorn Andersson int ret; 29322094814SBjorn Andersson 29422094814SBjorn Andersson qmp->qdss_clk.init = &qdss_init; 29522094814SBjorn Andersson ret = clk_hw_register(qmp->dev, &qmp->qdss_clk); 29622094814SBjorn Andersson if (ret < 0) { 29722094814SBjorn Andersson dev_err(qmp->dev, "failed to register qdss clock\n"); 29822094814SBjorn Andersson return ret; 29922094814SBjorn Andersson } 30022094814SBjorn Andersson 30122094814SBjorn Andersson ret = of_clk_add_hw_provider(qmp->dev->of_node, of_clk_hw_simple_get, 30222094814SBjorn Andersson &qmp->qdss_clk); 30322094814SBjorn Andersson if (ret < 0) { 30422094814SBjorn Andersson dev_err(qmp->dev, "unable to register of clk hw provider\n"); 30522094814SBjorn Andersson clk_hw_unregister(&qmp->qdss_clk); 30622094814SBjorn Andersson } 30722094814SBjorn Andersson 30822094814SBjorn Andersson return ret; 30922094814SBjorn Andersson } 31022094814SBjorn Andersson 31122094814SBjorn Andersson static void qmp_qdss_clk_remove(struct qmp *qmp) 31222094814SBjorn Andersson { 31322094814SBjorn Andersson of_clk_del_provider(qmp->dev->of_node); 31422094814SBjorn Andersson clk_hw_unregister(&qmp->qdss_clk); 31522094814SBjorn Andersson } 31622094814SBjorn Andersson 31722094814SBjorn Andersson static int qmp_pd_power_toggle(struct qmp_pd *res, bool enable) 31822094814SBjorn Andersson { 31922094814SBjorn Andersson char buf[QMP_MSG_LEN] = {}; 32022094814SBjorn Andersson 32122094814SBjorn Andersson snprintf(buf, sizeof(buf), 32222094814SBjorn Andersson "{class: image, res: load_state, name: %s, val: %s}", 32322094814SBjorn Andersson res->pd.name, enable ? "on" : "off"); 32422094814SBjorn Andersson return qmp_send(res->qmp, buf, sizeof(buf)); 32522094814SBjorn Andersson } 32622094814SBjorn Andersson 32722094814SBjorn Andersson static int qmp_pd_power_on(struct generic_pm_domain *domain) 32822094814SBjorn Andersson { 32922094814SBjorn Andersson return qmp_pd_power_toggle(to_qmp_pd_resource(domain), true); 33022094814SBjorn Andersson } 33122094814SBjorn Andersson 33222094814SBjorn Andersson static int qmp_pd_power_off(struct generic_pm_domain *domain) 33322094814SBjorn Andersson { 33422094814SBjorn Andersson return qmp_pd_power_toggle(to_qmp_pd_resource(domain), false); 33522094814SBjorn Andersson } 33622094814SBjorn Andersson 33722094814SBjorn Andersson static const char * const sdm845_resources[] = { 33822094814SBjorn Andersson [AOSS_QMP_LS_CDSP] = "cdsp", 33922094814SBjorn Andersson [AOSS_QMP_LS_LPASS] = "adsp", 34022094814SBjorn Andersson [AOSS_QMP_LS_MODEM] = "modem", 34122094814SBjorn Andersson [AOSS_QMP_LS_SLPI] = "slpi", 34222094814SBjorn Andersson [AOSS_QMP_LS_SPSS] = "spss", 34322094814SBjorn Andersson [AOSS_QMP_LS_VENUS] = "venus", 34422094814SBjorn Andersson }; 34522094814SBjorn Andersson 34622094814SBjorn Andersson static int qmp_pd_add(struct qmp *qmp) 34722094814SBjorn Andersson { 34822094814SBjorn Andersson struct genpd_onecell_data *data = &qmp->pd_data; 34922094814SBjorn Andersson struct device *dev = qmp->dev; 35022094814SBjorn Andersson struct qmp_pd *res; 35122094814SBjorn Andersson size_t num = ARRAY_SIZE(sdm845_resources); 35222094814SBjorn Andersson int ret; 35322094814SBjorn Andersson int i; 35422094814SBjorn Andersson 35522094814SBjorn Andersson res = devm_kcalloc(dev, num, sizeof(*res), GFP_KERNEL); 35622094814SBjorn Andersson if (!res) 35722094814SBjorn Andersson return -ENOMEM; 35822094814SBjorn Andersson 35922094814SBjorn Andersson data->domains = devm_kcalloc(dev, num, sizeof(*data->domains), 36022094814SBjorn Andersson GFP_KERNEL); 36122094814SBjorn Andersson if (!data->domains) 36222094814SBjorn Andersson return -ENOMEM; 36322094814SBjorn Andersson 36422094814SBjorn Andersson for (i = 0; i < num; i++) { 36522094814SBjorn Andersson res[i].qmp = qmp; 36622094814SBjorn Andersson res[i].pd.name = sdm845_resources[i]; 36722094814SBjorn Andersson res[i].pd.power_on = qmp_pd_power_on; 36822094814SBjorn Andersson res[i].pd.power_off = qmp_pd_power_off; 36922094814SBjorn Andersson 37022094814SBjorn Andersson ret = pm_genpd_init(&res[i].pd, NULL, true); 37122094814SBjorn Andersson if (ret < 0) { 37222094814SBjorn Andersson dev_err(dev, "failed to init genpd\n"); 37322094814SBjorn Andersson goto unroll_genpds; 37422094814SBjorn Andersson } 37522094814SBjorn Andersson 37622094814SBjorn Andersson data->domains[i] = &res[i].pd; 37722094814SBjorn Andersson } 37822094814SBjorn Andersson 37922094814SBjorn Andersson data->num_domains = i; 38022094814SBjorn Andersson 38122094814SBjorn Andersson ret = of_genpd_add_provider_onecell(dev->of_node, data); 38222094814SBjorn Andersson if (ret < 0) 38322094814SBjorn Andersson goto unroll_genpds; 38422094814SBjorn Andersson 38522094814SBjorn Andersson return 0; 38622094814SBjorn Andersson 38722094814SBjorn Andersson unroll_genpds: 38822094814SBjorn Andersson for (i--; i >= 0; i--) 38922094814SBjorn Andersson pm_genpd_remove(data->domains[i]); 39022094814SBjorn Andersson 39122094814SBjorn Andersson return ret; 39222094814SBjorn Andersson } 39322094814SBjorn Andersson 39422094814SBjorn Andersson static void qmp_pd_remove(struct qmp *qmp) 39522094814SBjorn Andersson { 39622094814SBjorn Andersson struct genpd_onecell_data *data = &qmp->pd_data; 39722094814SBjorn Andersson struct device *dev = qmp->dev; 39822094814SBjorn Andersson int i; 39922094814SBjorn Andersson 40022094814SBjorn Andersson of_genpd_del_provider(dev->of_node); 40122094814SBjorn Andersson 40222094814SBjorn Andersson for (i = 0; i < data->num_domains; i++) 40322094814SBjorn Andersson pm_genpd_remove(data->domains[i]); 40422094814SBjorn Andersson } 40522094814SBjorn Andersson 40605589b30SThara Gopinath static int qmp_cdev_get_max_state(struct thermal_cooling_device *cdev, 40705589b30SThara Gopinath unsigned long *state) 40805589b30SThara Gopinath { 409c55b5c66SThara Gopinath *state = qmp_cdev_max_state; 41005589b30SThara Gopinath return 0; 41105589b30SThara Gopinath } 41205589b30SThara Gopinath 41305589b30SThara Gopinath static int qmp_cdev_get_cur_state(struct thermal_cooling_device *cdev, 41405589b30SThara Gopinath unsigned long *state) 41505589b30SThara Gopinath { 41605589b30SThara Gopinath struct qmp_cooling_device *qmp_cdev = cdev->devdata; 41705589b30SThara Gopinath 41805589b30SThara Gopinath *state = qmp_cdev->state; 41905589b30SThara Gopinath return 0; 42005589b30SThara Gopinath } 42105589b30SThara Gopinath 42205589b30SThara Gopinath static int qmp_cdev_set_cur_state(struct thermal_cooling_device *cdev, 42305589b30SThara Gopinath unsigned long state) 42405589b30SThara Gopinath { 42505589b30SThara Gopinath struct qmp_cooling_device *qmp_cdev = cdev->devdata; 42605589b30SThara Gopinath char buf[QMP_MSG_LEN] = {}; 42705589b30SThara Gopinath bool cdev_state; 42805589b30SThara Gopinath int ret; 42905589b30SThara Gopinath 43005589b30SThara Gopinath /* Normalize state */ 43105589b30SThara Gopinath cdev_state = !!state; 43205589b30SThara Gopinath 43305589b30SThara Gopinath if (qmp_cdev->state == state) 43405589b30SThara Gopinath return 0; 43505589b30SThara Gopinath 43605589b30SThara Gopinath snprintf(buf, sizeof(buf), 43705589b30SThara Gopinath "{class: volt_flr, event:zero_temp, res:%s, value:%s}", 43805589b30SThara Gopinath qmp_cdev->name, 439c55b5c66SThara Gopinath cdev_state ? "on" : "off"); 44005589b30SThara Gopinath 44105589b30SThara Gopinath ret = qmp_send(qmp_cdev->qmp, buf, sizeof(buf)); 44205589b30SThara Gopinath 44305589b30SThara Gopinath if (!ret) 44405589b30SThara Gopinath qmp_cdev->state = cdev_state; 44505589b30SThara Gopinath 44605589b30SThara Gopinath return ret; 44705589b30SThara Gopinath } 44805589b30SThara Gopinath 44905589b30SThara Gopinath static struct thermal_cooling_device_ops qmp_cooling_device_ops = { 45005589b30SThara Gopinath .get_max_state = qmp_cdev_get_max_state, 45105589b30SThara Gopinath .get_cur_state = qmp_cdev_get_cur_state, 45205589b30SThara Gopinath .set_cur_state = qmp_cdev_set_cur_state, 45305589b30SThara Gopinath }; 45405589b30SThara Gopinath 45505589b30SThara Gopinath static int qmp_cooling_device_add(struct qmp *qmp, 45605589b30SThara Gopinath struct qmp_cooling_device *qmp_cdev, 45705589b30SThara Gopinath struct device_node *node) 45805589b30SThara Gopinath { 45905589b30SThara Gopinath char *cdev_name = (char *)node->name; 46005589b30SThara Gopinath 46105589b30SThara Gopinath qmp_cdev->qmp = qmp; 462c55b5c66SThara Gopinath qmp_cdev->state = !qmp_cdev_max_state; 46305589b30SThara Gopinath qmp_cdev->name = cdev_name; 46405589b30SThara Gopinath qmp_cdev->cdev = devm_thermal_of_cooling_device_register 46505589b30SThara Gopinath (qmp->dev, node, 46605589b30SThara Gopinath cdev_name, 46705589b30SThara Gopinath qmp_cdev, &qmp_cooling_device_ops); 46805589b30SThara Gopinath 46905589b30SThara Gopinath if (IS_ERR(qmp_cdev->cdev)) 47005589b30SThara Gopinath dev_err(qmp->dev, "unable to register %s cooling device\n", 47105589b30SThara Gopinath cdev_name); 47205589b30SThara Gopinath 47305589b30SThara Gopinath return PTR_ERR_OR_ZERO(qmp_cdev->cdev); 47405589b30SThara Gopinath } 47505589b30SThara Gopinath 47605589b30SThara Gopinath static int qmp_cooling_devices_register(struct qmp *qmp) 47705589b30SThara Gopinath { 47805589b30SThara Gopinath struct device_node *np, *child; 479*a89f355eSManivannan Sadhasivam int count = 0; 48005589b30SThara Gopinath int ret; 48105589b30SThara Gopinath 48205589b30SThara Gopinath np = qmp->dev->of_node; 48305589b30SThara Gopinath 484*a89f355eSManivannan Sadhasivam qmp->cooling_devs = devm_kcalloc(qmp->dev, QMP_NUM_COOLING_RESOURCES, 48505589b30SThara Gopinath sizeof(*qmp->cooling_devs), 48605589b30SThara Gopinath GFP_KERNEL); 48705589b30SThara Gopinath 48805589b30SThara Gopinath if (!qmp->cooling_devs) 48905589b30SThara Gopinath return -ENOMEM; 49005589b30SThara Gopinath 49105589b30SThara Gopinath for_each_available_child_of_node(np, child) { 49205589b30SThara Gopinath if (!of_find_property(child, "#cooling-cells", NULL)) 49305589b30SThara Gopinath continue; 49405589b30SThara Gopinath ret = qmp_cooling_device_add(qmp, &qmp->cooling_devs[count++], 49505589b30SThara Gopinath child); 49605589b30SThara Gopinath if (ret) 49705589b30SThara Gopinath goto unroll; 49805589b30SThara Gopinath } 49905589b30SThara Gopinath 500*a89f355eSManivannan Sadhasivam if (!count) 501*a89f355eSManivannan Sadhasivam devm_kfree(qmp->dev, qmp->cooling_devs); 502*a89f355eSManivannan Sadhasivam 50305589b30SThara Gopinath return 0; 50405589b30SThara Gopinath 50505589b30SThara Gopinath unroll: 50605589b30SThara Gopinath while (--count >= 0) 50705589b30SThara Gopinath thermal_cooling_device_unregister 50805589b30SThara Gopinath (qmp->cooling_devs[count].cdev); 509*a89f355eSManivannan Sadhasivam devm_kfree(qmp->dev, qmp->cooling_devs); 51005589b30SThara Gopinath 51105589b30SThara Gopinath return ret; 51205589b30SThara Gopinath } 51305589b30SThara Gopinath 51405589b30SThara Gopinath static void qmp_cooling_devices_remove(struct qmp *qmp) 51505589b30SThara Gopinath { 51605589b30SThara Gopinath int i; 51705589b30SThara Gopinath 51805589b30SThara Gopinath for (i = 0; i < QMP_NUM_COOLING_RESOURCES; i++) 51905589b30SThara Gopinath thermal_cooling_device_unregister(qmp->cooling_devs[i].cdev); 52005589b30SThara Gopinath } 52105589b30SThara Gopinath 52222094814SBjorn Andersson static int qmp_probe(struct platform_device *pdev) 52322094814SBjorn Andersson { 52422094814SBjorn Andersson struct resource *res; 52522094814SBjorn Andersson struct qmp *qmp; 52622094814SBjorn Andersson int irq; 52722094814SBjorn Andersson int ret; 52822094814SBjorn Andersson 52922094814SBjorn Andersson qmp = devm_kzalloc(&pdev->dev, sizeof(*qmp), GFP_KERNEL); 53022094814SBjorn Andersson if (!qmp) 53122094814SBjorn Andersson return -ENOMEM; 53222094814SBjorn Andersson 53322094814SBjorn Andersson qmp->dev = &pdev->dev; 53422094814SBjorn Andersson init_waitqueue_head(&qmp->event); 53522094814SBjorn Andersson mutex_init(&qmp->tx_lock); 53622094814SBjorn Andersson 53722094814SBjorn Andersson res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 53822094814SBjorn Andersson qmp->msgram = devm_ioremap_resource(&pdev->dev, res); 53922094814SBjorn Andersson if (IS_ERR(qmp->msgram)) 54022094814SBjorn Andersson return PTR_ERR(qmp->msgram); 54122094814SBjorn Andersson 54222094814SBjorn Andersson qmp->mbox_client.dev = &pdev->dev; 54322094814SBjorn Andersson qmp->mbox_client.knows_txdone = true; 54422094814SBjorn Andersson qmp->mbox_chan = mbox_request_channel(&qmp->mbox_client, 0); 54522094814SBjorn Andersson if (IS_ERR(qmp->mbox_chan)) { 54622094814SBjorn Andersson dev_err(&pdev->dev, "failed to acquire ipc mailbox\n"); 54722094814SBjorn Andersson return PTR_ERR(qmp->mbox_chan); 54822094814SBjorn Andersson } 54922094814SBjorn Andersson 55022094814SBjorn Andersson irq = platform_get_irq(pdev, 0); 55122094814SBjorn Andersson ret = devm_request_irq(&pdev->dev, irq, qmp_intr, IRQF_ONESHOT, 55222094814SBjorn Andersson "aoss-qmp", qmp); 55322094814SBjorn Andersson if (ret < 0) { 55422094814SBjorn Andersson dev_err(&pdev->dev, "failed to request interrupt\n"); 55522094814SBjorn Andersson goto err_free_mbox; 55622094814SBjorn Andersson } 55722094814SBjorn Andersson 55822094814SBjorn Andersson ret = qmp_open(qmp); 55922094814SBjorn Andersson if (ret < 0) 56022094814SBjorn Andersson goto err_free_mbox; 56122094814SBjorn Andersson 56222094814SBjorn Andersson ret = qmp_qdss_clk_add(qmp); 56322094814SBjorn Andersson if (ret) 56422094814SBjorn Andersson goto err_close_qmp; 56522094814SBjorn Andersson 56622094814SBjorn Andersson ret = qmp_pd_add(qmp); 56722094814SBjorn Andersson if (ret) 56822094814SBjorn Andersson goto err_remove_qdss_clk; 56922094814SBjorn Andersson 57005589b30SThara Gopinath ret = qmp_cooling_devices_register(qmp); 57105589b30SThara Gopinath if (ret) 57205589b30SThara Gopinath dev_err(&pdev->dev, "failed to register aoss cooling devices\n"); 57305589b30SThara Gopinath 57422094814SBjorn Andersson platform_set_drvdata(pdev, qmp); 57522094814SBjorn Andersson 57622094814SBjorn Andersson return 0; 57722094814SBjorn Andersson 57822094814SBjorn Andersson err_remove_qdss_clk: 57922094814SBjorn Andersson qmp_qdss_clk_remove(qmp); 58022094814SBjorn Andersson err_close_qmp: 58122094814SBjorn Andersson qmp_close(qmp); 58222094814SBjorn Andersson err_free_mbox: 58322094814SBjorn Andersson mbox_free_channel(qmp->mbox_chan); 58422094814SBjorn Andersson 58522094814SBjorn Andersson return ret; 58622094814SBjorn Andersson } 58722094814SBjorn Andersson 58822094814SBjorn Andersson static int qmp_remove(struct platform_device *pdev) 58922094814SBjorn Andersson { 59022094814SBjorn Andersson struct qmp *qmp = platform_get_drvdata(pdev); 59122094814SBjorn Andersson 59222094814SBjorn Andersson qmp_qdss_clk_remove(qmp); 59322094814SBjorn Andersson qmp_pd_remove(qmp); 59405589b30SThara Gopinath qmp_cooling_devices_remove(qmp); 59522094814SBjorn Andersson 59622094814SBjorn Andersson qmp_close(qmp); 59722094814SBjorn Andersson mbox_free_channel(qmp->mbox_chan); 59822094814SBjorn Andersson 59922094814SBjorn Andersson return 0; 60022094814SBjorn Andersson } 60122094814SBjorn Andersson 60222094814SBjorn Andersson static const struct of_device_id qmp_dt_match[] = { 60317095102SSibi Sankar { .compatible = "qcom,sc7180-aoss-qmp", }, 604ce6e674aSSai Prakash Ranjan { .compatible = "qcom,sc7280-aoss-qmp", }, 60522094814SBjorn Andersson { .compatible = "qcom,sdm845-aoss-qmp", }, 60617095102SSibi Sankar { .compatible = "qcom,sm8150-aoss-qmp", }, 607ce187859SBjorn Andersson { .compatible = "qcom,sm8250-aoss-qmp", }, 608e161ce8eSVinod Koul { .compatible = "qcom,sm8350-aoss-qmp", }, 609d63486ddSBjorn Andersson { .compatible = "qcom,aoss-qmp", }, 61022094814SBjorn Andersson {} 61122094814SBjorn Andersson }; 61222094814SBjorn Andersson MODULE_DEVICE_TABLE(of, qmp_dt_match); 61322094814SBjorn Andersson 61422094814SBjorn Andersson static struct platform_driver qmp_driver = { 61522094814SBjorn Andersson .driver = { 61622094814SBjorn Andersson .name = "qcom_aoss_qmp", 61722094814SBjorn Andersson .of_match_table = qmp_dt_match, 61822094814SBjorn Andersson }, 61922094814SBjorn Andersson .probe = qmp_probe, 62022094814SBjorn Andersson .remove = qmp_remove, 62122094814SBjorn Andersson }; 62222094814SBjorn Andersson module_platform_driver(qmp_driver); 62322094814SBjorn Andersson 62422094814SBjorn Andersson MODULE_DESCRIPTION("Qualcomm AOSS QMP driver"); 62522094814SBjorn Andersson MODULE_LICENSE("GPL v2"); 626