// SPDX-License-Identifier: GPL-2.0-only /* Copyright 2021 NXP */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "imx_rproc.h" #include "remoteproc_elf_helpers.h" #include "remoteproc_internal.h" #define DSP_RPROC_CLK_MAX 5 #define REMOTE_IS_READY BIT(0) #define REMOTE_READY_WAIT_MAX_RETRIES 500 /* att flags */ /* DSP own area */ #define ATT_OWN BIT(31) /* DSP instruction area */ #define ATT_IRAM BIT(30) /* Definitions for i.MX8MP */ /* DAP registers */ #define IMX8M_DAP_DEBUG 0x28800000 #define IMX8M_DAP_DEBUG_SIZE (64 * 1024) #define IMX8M_DAP_PWRCTL (0x4000 + 0x3020) #define IMX8M_PWRCTL_CORERESET BIT(16) /* DSP audio mix registers */ #define IMX8M_AudioDSP_REG0 0x100 #define IMX8M_AudioDSP_REG1 0x104 #define IMX8M_AudioDSP_REG2 0x108 #define IMX8M_AudioDSP_REG3 0x10c #define IMX8M_AudioDSP_REG2_RUNSTALL BIT(5) #define IMX8M_AudioDSP_REG2_PWAITMODE BIT(1) /* Definitions for i.MX8ULP */ #define IMX8ULP_SIM_LPAV_REG_SYSCTRL0 0x8 #define IMX8ULP_SYSCTRL0_DSP_DBG_RST BIT(25) #define IMX8ULP_SYSCTRL0_DSP_PLAT_CLK_EN BIT(19) #define IMX8ULP_SYSCTRL0_DSP_PBCLK_EN BIT(18) #define IMX8ULP_SYSCTRL0_DSP_CLK_EN BIT(17) #define IMX8ULP_SYSCTRL0_DSP_RST BIT(16) #define IMX8ULP_SYSCTRL0_DSP_OCD_HALT BIT(14) #define IMX8ULP_SYSCTRL0_DSP_STALL BIT(13) #define IMX8ULP_SIP_HIFI_XRDC 0xc200000e /* * enum - Predefined Mailbox Messages * * @RP_MBOX_SUSPEND_SYSTEM: system suspend request for the remote processor * * @RP_MBOX_SUSPEND_ACK: successful response from remote processor for a * suspend request * * @RP_MBOX_RESUME_SYSTEM: system resume request for the remote processor * * @RP_MBOX_RESUME_ACK: successful response from remote processor for a * resume request */ enum imx_dsp_rp_mbox_messages { RP_MBOX_SUSPEND_SYSTEM = 0xFF11, RP_MBOX_SUSPEND_ACK = 0xFF12, RP_MBOX_RESUME_SYSTEM = 0xFF13, RP_MBOX_RESUME_ACK = 0xFF14, }; /** * struct imx_dsp_rproc - DSP remote processor state * @regmap: regmap handler * @rproc: rproc handler * @dsp_dcfg: device configuration pointer * @clks: clocks needed by this device * @cl: mailbox client to request the mailbox channel * @cl_rxdb: mailbox client to request the mailbox channel for doorbell * @tx_ch: mailbox tx channel handle * @rx_ch: mailbox rx channel handle * @rxdb_ch: mailbox rx doorbell channel handle * @pd_dev: power domain device * @pd_dev_link: power domain device link * @ipc_handle: System Control Unit ipc handle * @rproc_work: work for processing virtio interrupts * @pm_comp: completion primitive to sync for suspend response * @num_domains: power domain number * @flags: control flags */ struct imx_dsp_rproc { struct regmap *regmap; struct rproc *rproc; const struct imx_dsp_rproc_dcfg *dsp_dcfg; struct clk_bulk_data clks[DSP_RPROC_CLK_MAX]; struct mbox_client cl; struct mbox_client cl_rxdb; struct mbox_chan *tx_ch; struct mbox_chan *rx_ch; struct mbox_chan *rxdb_ch; struct device **pd_dev; struct device_link **pd_dev_link; struct imx_sc_ipc *ipc_handle; struct work_struct rproc_work; struct completion pm_comp; int num_domains; u32 flags; }; /** * struct imx_dsp_rproc_dcfg - DSP remote processor configuration * @dcfg: imx_rproc_dcfg handler * @reset: reset callback function */ struct imx_dsp_rproc_dcfg { const struct imx_rproc_dcfg *dcfg; int (*reset)(struct imx_dsp_rproc *priv); }; static const struct imx_rproc_att imx_dsp_rproc_att_imx8qm[] = { /* dev addr , sys addr , size , flags */ { 0x596e8000, 0x556e8000, 0x00008000, ATT_OWN }, { 0x596f0000, 0x556f0000, 0x00008000, ATT_OWN }, { 0x596f8000, 0x556f8000, 0x00000800, ATT_OWN | ATT_IRAM}, { 0x55700000, 0x55700000, 0x00070000, ATT_OWN }, /* DDR (Data) */ { 0x80000000, 0x80000000, 0x60000000, 0}, }; static const struct imx_rproc_att imx_dsp_rproc_att_imx8qxp[] = { /* dev addr , sys addr , size , flags */ { 0x596e8000, 0x596e8000, 0x00008000, ATT_OWN }, { 0x596f0000, 0x596f0000, 0x00008000, ATT_OWN }, { 0x596f8000, 0x596f8000, 0x00000800, ATT_OWN | ATT_IRAM}, { 0x59700000, 0x59700000, 0x00070000, ATT_OWN }, /* DDR (Data) */ { 0x80000000, 0x80000000, 0x60000000, 0}, }; static const struct imx_rproc_att imx_dsp_rproc_att_imx8mp[] = { /* dev addr , sys addr , size , flags */ { 0x3b6e8000, 0x3b6e8000, 0x00008000, ATT_OWN }, { 0x3b6f0000, 0x3b6f0000, 0x00008000, ATT_OWN }, { 0x3b6f8000, 0x3b6f8000, 0x00000800, ATT_OWN | ATT_IRAM}, { 0x3b700000, 0x3b700000, 0x00040000, ATT_OWN }, /* DDR (Data) */ { 0x40000000, 0x40000000, 0x80000000, 0}, }; static const struct imx_rproc_att imx_dsp_rproc_att_imx8ulp[] = { /* dev addr , sys addr , size , flags */ { 0x21170000, 0x21170000, 0x00010000, ATT_OWN | ATT_IRAM}, { 0x21180000, 0x21180000, 0x00010000, ATT_OWN }, /* DDR (Data) */ { 0x0c000000, 0x80000000, 0x10000000, 0}, { 0x30000000, 0x90000000, 0x10000000, 0}, }; /* Reset function for DSP on i.MX8MP */ static int imx8mp_dsp_reset(struct imx_dsp_rproc *priv) { void __iomem *dap = ioremap_wc(IMX8M_DAP_DEBUG, IMX8M_DAP_DEBUG_SIZE); int pwrctl; /* Put DSP into reset and stall */ pwrctl = readl(dap + IMX8M_DAP_PWRCTL); pwrctl |= IMX8M_PWRCTL_CORERESET; writel(pwrctl, dap + IMX8M_DAP_PWRCTL); /* Keep reset asserted for 10 cycles */ usleep_range(1, 2); regmap_update_bits(priv->regmap, IMX8M_AudioDSP_REG2, IMX8M_AudioDSP_REG2_RUNSTALL, IMX8M_AudioDSP_REG2_RUNSTALL); /* Take the DSP out of reset and keep stalled for FW loading */ pwrctl = readl(dap + IMX8M_DAP_PWRCTL); pwrctl &= ~IMX8M_PWRCTL_CORERESET; writel(pwrctl, dap + IMX8M_DAP_PWRCTL); iounmap(dap); return 0; } /* Reset function for DSP on i.MX8ULP */ static int imx8ulp_dsp_reset(struct imx_dsp_rproc *priv) { struct arm_smccc_res res; /* Put DSP into reset and stall */ regmap_update_bits(priv->regmap, IMX8ULP_SIM_LPAV_REG_SYSCTRL0, IMX8ULP_SYSCTRL0_DSP_RST, IMX8ULP_SYSCTRL0_DSP_RST); regmap_update_bits(priv->regmap, IMX8ULP_SIM_LPAV_REG_SYSCTRL0, IMX8ULP_SYSCTRL0_DSP_STALL, IMX8ULP_SYSCTRL0_DSP_STALL); /* Configure resources of DSP through TFA */ arm_smccc_smc(IMX8ULP_SIP_HIFI_XRDC, 0, 0, 0, 0, 0, 0, 0, &res); /* Take the DSP out of reset and keep stalled for FW loading */ regmap_update_bits(priv->regmap, IMX8ULP_SIM_LPAV_REG_SYSCTRL0, IMX8ULP_SYSCTRL0_DSP_RST, 0); regmap_update_bits(priv->regmap, IMX8ULP_SIM_LPAV_REG_SYSCTRL0, IMX8ULP_SYSCTRL0_DSP_DBG_RST, 0); return 0; } /* Specific configuration for i.MX8MP */ static const struct imx_rproc_dcfg dsp_rproc_cfg_imx8mp = { .src_reg = IMX8M_AudioDSP_REG2, .src_mask = IMX8M_AudioDSP_REG2_RUNSTALL, .src_start = 0, .src_stop = IMX8M_AudioDSP_REG2_RUNSTALL, .att = imx_dsp_rproc_att_imx8mp, .att_size = ARRAY_SIZE(imx_dsp_rproc_att_imx8mp), .method = IMX_RPROC_MMIO, }; static const struct imx_dsp_rproc_dcfg imx_dsp_rproc_cfg_imx8mp = { .dcfg = &dsp_rproc_cfg_imx8mp, .reset = imx8mp_dsp_reset, }; /* Specific configuration for i.MX8ULP */ static const struct imx_rproc_dcfg dsp_rproc_cfg_imx8ulp = { .src_reg = IMX8ULP_SIM_LPAV_REG_SYSCTRL0, .src_mask = IMX8ULP_SYSCTRL0_DSP_STALL, .src_start = 0, .src_stop = IMX8ULP_SYSCTRL0_DSP_STALL, .att = imx_dsp_rproc_att_imx8ulp, .att_size = ARRAY_SIZE(imx_dsp_rproc_att_imx8ulp), .method = IMX_RPROC_MMIO, }; static const struct imx_dsp_rproc_dcfg imx_dsp_rproc_cfg_imx8ulp = { .dcfg = &dsp_rproc_cfg_imx8ulp, .reset = imx8ulp_dsp_reset, }; /* Specific configuration for i.MX8QXP */ static const struct imx_rproc_dcfg dsp_rproc_cfg_imx8qxp = { .att = imx_dsp_rproc_att_imx8qxp, .att_size = ARRAY_SIZE(imx_dsp_rproc_att_imx8qxp), .method = IMX_RPROC_SCU_API, }; static const struct imx_dsp_rproc_dcfg imx_dsp_rproc_cfg_imx8qxp = { .dcfg = &dsp_rproc_cfg_imx8qxp, }; /* Specific configuration for i.MX8QM */ static const struct imx_rproc_dcfg dsp_rproc_cfg_imx8qm = { .att = imx_dsp_rproc_att_imx8qm, .att_size = ARRAY_SIZE(imx_dsp_rproc_att_imx8qm), .method = IMX_RPROC_SCU_API, }; static const struct imx_dsp_rproc_dcfg imx_dsp_rproc_cfg_imx8qm = { .dcfg = &dsp_rproc_cfg_imx8qm, }; static int imx_dsp_rproc_ready(struct rproc *rproc) { struct imx_dsp_rproc *priv = rproc->priv; int i; if (!priv->rxdb_ch) return 0; for (i = 0; i < REMOTE_READY_WAIT_MAX_RETRIES; i++) { if (priv->flags & REMOTE_IS_READY) return 0; usleep_range(100, 200); } return -ETIMEDOUT; } /* * Start function for rproc_ops * * There is a handshake for start procedure: when DSP starts, it * will send a doorbell message to this driver, then the * REMOTE_IS_READY flags is set, then driver will kick * a message to DSP. */ static int imx_dsp_rproc_start(struct rproc *rproc) { struct imx_dsp_rproc *priv = rproc->priv; const struct imx_dsp_rproc_dcfg *dsp_dcfg = priv->dsp_dcfg; const struct imx_rproc_dcfg *dcfg = dsp_dcfg->dcfg; struct device *dev = rproc->dev.parent; int ret; switch (dcfg->method) { case IMX_RPROC_MMIO: ret = regmap_update_bits(priv->regmap, dcfg->src_reg, dcfg->src_mask, dcfg->src_start); break; case IMX_RPROC_SCU_API: ret = imx_sc_pm_cpu_start(priv->ipc_handle, IMX_SC_R_DSP, true, rproc->bootaddr); break; default: return -EOPNOTSUPP; } if (ret) dev_err(dev, "Failed to enable remote core!\n"); else ret = imx_dsp_rproc_ready(rproc); return ret; } /* * Stop function for rproc_ops * It clears the REMOTE_IS_READY flags */ static int imx_dsp_rproc_stop(struct rproc *rproc) { struct imx_dsp_rproc *priv = rproc->priv; const struct imx_dsp_rproc_dcfg *dsp_dcfg = priv->dsp_dcfg; const struct imx_rproc_dcfg *dcfg = dsp_dcfg->dcfg; struct device *dev = rproc->dev.parent; int ret = 0; if (rproc->state == RPROC_CRASHED) { priv->flags &= ~REMOTE_IS_READY; return 0; } switch (dcfg->method) { case IMX_RPROC_MMIO: ret = regmap_update_bits(priv->regmap, dcfg->src_reg, dcfg->src_mask, dcfg->src_stop); break; case IMX_RPROC_SCU_API: ret = imx_sc_pm_cpu_start(priv->ipc_handle, IMX_SC_R_DSP, false, rproc->bootaddr); break; default: return -EOPNOTSUPP; } if (ret) dev_err(dev, "Failed to stop remote core\n"); else priv->flags &= ~REMOTE_IS_READY; return ret; } /** * imx_dsp_rproc_sys_to_da() - internal memory translation helper * @priv: private data pointer * @sys: system address (DDR address) * @len: length of the memory buffer * @da: device address to translate * * Convert system address (DDR address) to device address (DSP) * for there may be memory remap for device. */ static int imx_dsp_rproc_sys_to_da(struct imx_dsp_rproc *priv, u64 sys, size_t len, u64 *da) { const struct imx_dsp_rproc_dcfg *dsp_dcfg = priv->dsp_dcfg; const struct imx_rproc_dcfg *dcfg = dsp_dcfg->dcfg; int i; /* Parse address translation table */ for (i = 0; i < dcfg->att_size; i++) { const struct imx_rproc_att *att = &dcfg->att[i]; if (sys >= att->sa && sys + len <= att->sa + att->size) { unsigned int offset = sys - att->sa; *da = att->da + offset; return 0; } } return -ENOENT; } /* Main virtqueue message work function * * This function is executed upon scheduling of the i.MX DSP remoteproc * driver's workqueue. The workqueue is scheduled by the mailbox rx * handler. * * This work function processes both the Tx and Rx virtqueue indices on * every invocation. The rproc_vq_interrupt function can detect if there * are new unprocessed messages or not (returns IRQ_NONE vs IRQ_HANDLED), * but there is no need to check for these return values. The index 0 * triggering will process all pending Rx buffers, and the index 1 triggering * will process all newly available Tx buffers and will wakeup any potentially * blocked senders. * * NOTE: * The current logic is based on an inherent design assumption of supporting * only 2 vrings, but this can be changed if needed. */ static void imx_dsp_rproc_vq_work(struct work_struct *work) { struct imx_dsp_rproc *priv = container_of(work, struct imx_dsp_rproc, rproc_work); struct rproc *rproc = priv->rproc; mutex_lock(&rproc->lock); if (rproc->state != RPROC_RUNNING) goto unlock_mutex; rproc_vq_interrupt(priv->rproc, 0); rproc_vq_interrupt(priv->rproc, 1); unlock_mutex: mutex_unlock(&rproc->lock); } /** * imx_dsp_rproc_rx_tx_callback() - inbound mailbox message handler * @cl: mailbox client pointer used for requesting the mailbox channel * @data: mailbox payload * * This handler is invoked by mailbox driver whenever a mailbox * message is received. Usually, the SUSPEND and RESUME related messages * are handled in this function, other messages are handled by remoteproc core */ static void imx_dsp_rproc_rx_tx_callback(struct mbox_client *cl, void *data) { struct rproc *rproc = dev_get_drvdata(cl->dev); struct imx_dsp_rproc *priv = rproc->priv; struct device *dev = rproc->dev.parent; u32 message = (u32)(*(u32 *)data); dev_dbg(dev, "mbox msg: 0x%x\n", message); switch (message) { case RP_MBOX_SUSPEND_ACK: complete(&priv->pm_comp); break; case RP_MBOX_RESUME_ACK: complete(&priv->pm_comp); break; default: schedule_work(&priv->rproc_work); break; } } /** * imx_dsp_rproc_rxdb_callback() - inbound mailbox message handler * @cl: mailbox client pointer used for requesting the mailbox channel * @data: mailbox payload * * For doorbell, there is no message specified, just set REMOTE_IS_READY * flag. */ static void imx_dsp_rproc_rxdb_callback(struct mbox_client *cl, void *data) { struct rproc *rproc = dev_get_drvdata(cl->dev); struct imx_dsp_rproc *priv = rproc->priv; /* Remote is ready after firmware is loaded and running */ priv->flags |= REMOTE_IS_READY; } /** * imx_dsp_rproc_mbox_init() - request mailbox channels * @priv: private data pointer * * Request three mailbox channels (tx, rx, rxdb). */ static int imx_dsp_rproc_mbox_init(struct imx_dsp_rproc *priv) { struct device *dev = priv->rproc->dev.parent; struct mbox_client *cl; int ret; if (!of_get_property(dev->of_node, "mbox-names", NULL)) return 0; cl = &priv->cl; cl->dev = dev; cl->tx_block = true; cl->tx_tout = 100; cl->knows_txdone = false; cl->rx_callback = imx_dsp_rproc_rx_tx_callback; /* Channel for sending message */ priv->tx_ch = mbox_request_channel_byname(cl, "tx"); if (IS_ERR(priv->tx_ch)) { ret = PTR_ERR(priv->tx_ch); dev_dbg(cl->dev, "failed to request tx mailbox channel: %d\n", ret); goto err_out; } /* Channel for receiving message */ priv->rx_ch = mbox_request_channel_byname(cl, "rx"); if (IS_ERR(priv->rx_ch)) { ret = PTR_ERR(priv->rx_ch); dev_dbg(cl->dev, "failed to request rx mailbox channel: %d\n", ret); goto err_out; } cl = &priv->cl_rxdb; cl->dev = dev; cl->rx_callback = imx_dsp_rproc_rxdb_callback; /* * RX door bell is used to receive the ready signal from remote * after firmware loaded. */ priv->rxdb_ch = mbox_request_channel_byname(cl, "rxdb"); if (IS_ERR(priv->rxdb_ch)) { ret = PTR_ERR(priv->rxdb_ch); dev_dbg(cl->dev, "failed to request mbox chan rxdb, ret %d\n", ret); goto err_out; } return 0; err_out: if (!IS_ERR(priv->tx_ch)) mbox_free_channel(priv->tx_ch); if (!IS_ERR(priv->rx_ch)) mbox_free_channel(priv->rx_ch); if (!IS_ERR(priv->rxdb_ch)) mbox_free_channel(priv->rxdb_ch); return ret; } static void imx_dsp_rproc_free_mbox(struct imx_dsp_rproc *priv) { mbox_free_channel(priv->tx_ch); mbox_free_channel(priv->rx_ch); mbox_free_channel(priv->rxdb_ch); } /** * imx_dsp_rproc_add_carveout() - request mailbox channels * @priv: private data pointer * * This function registers specified memory entry in @rproc carveouts list * The carveouts can help to mapping the memory address for DSP. */ static int imx_dsp_rproc_add_carveout(struct imx_dsp_rproc *priv) { const struct imx_dsp_rproc_dcfg *dsp_dcfg = priv->dsp_dcfg; const struct imx_rproc_dcfg *dcfg = dsp_dcfg->dcfg; struct rproc *rproc = priv->rproc; struct device *dev = rproc->dev.parent; struct device_node *np = dev->of_node; struct of_phandle_iterator it; struct rproc_mem_entry *mem; struct reserved_mem *rmem; void __iomem *cpu_addr; int a; u64 da; /* Remap required addresses */ for (a = 0; a < dcfg->att_size; a++) { const struct imx_rproc_att *att = &dcfg->att[a]; if (!(att->flags & ATT_OWN)) continue; if (imx_dsp_rproc_sys_to_da(priv, att->sa, att->size, &da)) return -EINVAL; cpu_addr = devm_ioremap_wc(dev, att->sa, att->size); if (!cpu_addr) { dev_err(dev, "failed to map memory %p\n", &att->sa); return -ENOMEM; } /* Register memory region */ mem = rproc_mem_entry_init(dev, (void __force *)cpu_addr, (dma_addr_t)att->sa, att->size, da, NULL, NULL, "dsp_mem"); if (mem) rproc_coredump_add_segment(rproc, da, att->size); else return -ENOMEM; rproc_add_carveout(rproc, mem); } of_phandle_iterator_init(&it, np, "memory-region", NULL, 0); while (of_phandle_iterator_next(&it) == 0) { /* * Ignore the first memory region which will be used vdev buffer. * No need to do extra handlings, rproc_add_virtio_dev will handle it. */ if (!strcmp(it.node->name, "vdev0buffer")) continue; rmem = of_reserved_mem_lookup(it.node); if (!rmem) { dev_err(dev, "unable to acquire memory-region\n"); return -EINVAL; } if (imx_dsp_rproc_sys_to_da(priv, rmem->base, rmem->size, &da)) return -EINVAL; cpu_addr = devm_ioremap_wc(dev, rmem->base, rmem->size); if (!cpu_addr) { dev_err(dev, "failed to map memory %p\n", &rmem->base); return -ENOMEM; } /* Register memory region */ mem = rproc_mem_entry_init(dev, (void __force *)cpu_addr, (dma_addr_t)rmem->base, rmem->size, da, NULL, NULL, it.node->name); if (mem) rproc_coredump_add_segment(rproc, da, rmem->size); else return -ENOMEM; rproc_add_carveout(rproc, mem); } return 0; } /* Prepare function for rproc_ops */ static int imx_dsp_rproc_prepare(struct rproc *rproc) { struct imx_dsp_rproc *priv = rproc->priv; struct device *dev = rproc->dev.parent; struct rproc_mem_entry *carveout; int ret; ret = imx_dsp_rproc_add_carveout(priv); if (ret) { dev_err(dev, "failed on imx_dsp_rproc_add_carveout\n"); return ret; } pm_runtime_get_sync(dev); /* * Clear buffers after pm rumtime for internal ocram is not * accessible if power and clock are not enabled. */ list_for_each_entry(carveout, &rproc->carveouts, node) { if (carveout->va) memset(carveout->va, 0, carveout->len); } return 0; } /* Unprepare function for rproc_ops */ static int imx_dsp_rproc_unprepare(struct rproc *rproc) { pm_runtime_put_sync(rproc->dev.parent); return 0; } /* Kick function for rproc_ops */ static void imx_dsp_rproc_kick(struct rproc *rproc, int vqid) { struct imx_dsp_rproc *priv = rproc->priv; struct device *dev = rproc->dev.parent; int err; __u32 mmsg; if (!priv->tx_ch) { dev_err(dev, "No initialized mbox tx channel\n"); return; } /* * Send the index of the triggered virtqueue as the mu payload. * Let remote processor know which virtqueue is used. */ mmsg = vqid; err = mbox_send_message(priv->tx_ch, (void *)&mmsg); if (err < 0) dev_err(dev, "%s: failed (%d, err:%d)\n", __func__, vqid, err); } static int imx_dsp_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw) { if (rproc_elf_load_rsc_table(rproc, fw)) dev_warn(&rproc->dev, "no resource table found for this firmware\n"); return 0; } static const struct rproc_ops imx_dsp_rproc_ops = { .prepare = imx_dsp_rproc_prepare, .unprepare = imx_dsp_rproc_unprepare, .start = imx_dsp_rproc_start, .stop = imx_dsp_rproc_stop, .kick = imx_dsp_rproc_kick, .load = rproc_elf_load_segments, .parse_fw = imx_dsp_rproc_parse_fw, .sanity_check = rproc_elf_sanity_check, .get_boot_addr = rproc_elf_get_boot_addr, }; /** * imx_dsp_attach_pm_domains() - attach the power domains * @priv: private data pointer * * On i.MX8QM and i.MX8QXP there is multiple power domains * required, so need to link them. */ static int imx_dsp_attach_pm_domains(struct imx_dsp_rproc *priv) { struct device *dev = priv->rproc->dev.parent; int ret, i; priv->num_domains = of_count_phandle_with_args(dev->of_node, "power-domains", "#power-domain-cells"); /* If only one domain, then no need to link the device */ if (priv->num_domains <= 1) return 0; priv->pd_dev = devm_kmalloc_array(dev, priv->num_domains, sizeof(*priv->pd_dev), GFP_KERNEL); if (!priv->pd_dev) return -ENOMEM; priv->pd_dev_link = devm_kmalloc_array(dev, priv->num_domains, sizeof(*priv->pd_dev_link), GFP_KERNEL); if (!priv->pd_dev_link) return -ENOMEM; for (i = 0; i < priv->num_domains; i++) { priv->pd_dev[i] = dev_pm_domain_attach_by_id(dev, i); if (IS_ERR(priv->pd_dev[i])) { ret = PTR_ERR(priv->pd_dev[i]); goto detach_pm; } /* * device_link_add will check priv->pd_dev[i], if it is * NULL, then will break. */ priv->pd_dev_link[i] = device_link_add(dev, priv->pd_dev[i], DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME); if (!priv->pd_dev_link[i]) { dev_pm_domain_detach(priv->pd_dev[i], false); ret = -EINVAL; goto detach_pm; } } return 0; detach_pm: while (--i >= 0) { device_link_del(priv->pd_dev_link[i]); dev_pm_domain_detach(priv->pd_dev[i], false); } return ret; } static int imx_dsp_detach_pm_domains(struct imx_dsp_rproc *priv) { int i; if (priv->num_domains <= 1) return 0; for (i = 0; i < priv->num_domains; i++) { device_link_del(priv->pd_dev_link[i]); dev_pm_domain_detach(priv->pd_dev[i], false); } return 0; } /** * imx_dsp_rproc_detect_mode() - detect DSP control mode * @priv: private data pointer * * Different platform has different control method for DSP, which depends * on how the DSP is integrated in platform. * * For i.MX8QXP and i.MX8QM, DSP should be started and stopped by System * Control Unit. * For i.MX8MP and i.MX8ULP, DSP should be started and stopped by system * integration module. */ static int imx_dsp_rproc_detect_mode(struct imx_dsp_rproc *priv) { const struct imx_dsp_rproc_dcfg *dsp_dcfg = priv->dsp_dcfg; struct device *dev = priv->rproc->dev.parent; struct regmap *regmap; int ret = 0; switch (dsp_dcfg->dcfg->method) { case IMX_RPROC_SCU_API: ret = imx_scu_get_handle(&priv->ipc_handle); if (ret) return ret; break; case IMX_RPROC_MMIO: regmap = syscon_regmap_lookup_by_phandle(dev->of_node, "fsl,dsp-ctrl"); if (IS_ERR(regmap)) { dev_err(dev, "failed to find syscon\n"); return PTR_ERR(regmap); } priv->regmap = regmap; break; default: ret = -EOPNOTSUPP; break; } return ret; } static const char *imx_dsp_clks_names[DSP_RPROC_CLK_MAX] = { /* DSP clocks */ "core", "ocram", "debug", "ipg", "mu", }; static int imx_dsp_rproc_clk_get(struct imx_dsp_rproc *priv) { struct device *dev = priv->rproc->dev.parent; struct clk_bulk_data *clks = priv->clks; int i; for (i = 0; i < DSP_RPROC_CLK_MAX; i++) clks[i].id = imx_dsp_clks_names[i]; return devm_clk_bulk_get_optional(dev, DSP_RPROC_CLK_MAX, clks); } static int imx_dsp_rproc_probe(struct platform_device *pdev) { const struct imx_dsp_rproc_dcfg *dsp_dcfg; struct device *dev = &pdev->dev; struct imx_dsp_rproc *priv; struct rproc *rproc; const char *fw_name; int ret; dsp_dcfg = of_device_get_match_data(dev); if (!dsp_dcfg) return -ENODEV; ret = rproc_of_parse_firmware(dev, 0, &fw_name); if (ret) { dev_err(dev, "failed to parse firmware-name property, ret = %d\n", ret); return ret; } rproc = rproc_alloc(dev, "imx-dsp-rproc", &imx_dsp_rproc_ops, fw_name, sizeof(*priv)); if (!rproc) return -ENOMEM; priv = rproc->priv; priv->rproc = rproc; priv->dsp_dcfg = dsp_dcfg; dev_set_drvdata(dev, rproc); INIT_WORK(&priv->rproc_work, imx_dsp_rproc_vq_work); ret = imx_dsp_rproc_detect_mode(priv); if (ret) { dev_err(dev, "failed on imx_dsp_rproc_detect_mode\n"); goto err_put_rproc; } /* There are multiple power domains required by DSP on some platform */ ret = imx_dsp_attach_pm_domains(priv); if (ret) { dev_err(dev, "failed on imx_dsp_attach_pm_domains\n"); goto err_put_rproc; } /* Get clocks */ ret = imx_dsp_rproc_clk_get(priv); if (ret) { dev_err(dev, "failed on imx_dsp_rproc_clk_get\n"); goto err_detach_domains; } init_completion(&priv->pm_comp); rproc->auto_boot = false; ret = rproc_add(rproc); if (ret) { dev_err(dev, "rproc_add failed\n"); goto err_detach_domains; } pm_runtime_enable(dev); return 0; err_detach_domains: imx_dsp_detach_pm_domains(priv); err_put_rproc: rproc_free(rproc); return ret; } static int imx_dsp_rproc_remove(struct platform_device *pdev) { struct rproc *rproc = platform_get_drvdata(pdev); struct imx_dsp_rproc *priv = rproc->priv; pm_runtime_disable(&pdev->dev); rproc_del(rproc); imx_dsp_detach_pm_domains(priv); rproc_free(rproc); return 0; } /* pm runtime functions */ static int imx_dsp_runtime_resume(struct device *dev) { struct rproc *rproc = dev_get_drvdata(dev); struct imx_dsp_rproc *priv = rproc->priv; const struct imx_dsp_rproc_dcfg *dsp_dcfg = priv->dsp_dcfg; int ret; /* * There is power domain attached with mailbox, if setup mailbox * in probe(), then the power of mailbox is always enabled, * the power can't be saved. * So move setup of mailbox to runtime resume. */ ret = imx_dsp_rproc_mbox_init(priv); if (ret) { dev_err(dev, "failed on imx_dsp_rproc_mbox_init\n"); return ret; } ret = clk_bulk_prepare_enable(DSP_RPROC_CLK_MAX, priv->clks); if (ret) { dev_err(dev, "failed on clk_bulk_prepare_enable\n"); return ret; } /* Reset DSP if needed */ if (dsp_dcfg->reset) dsp_dcfg->reset(priv); return 0; } static int imx_dsp_runtime_suspend(struct device *dev) { struct rproc *rproc = dev_get_drvdata(dev); struct imx_dsp_rproc *priv = rproc->priv; clk_bulk_disable_unprepare(DSP_RPROC_CLK_MAX, priv->clks); imx_dsp_rproc_free_mbox(priv); return 0; } static void imx_dsp_load_firmware(const struct firmware *fw, void *context) { struct rproc *rproc = context; int ret; /* * Same flow as start procedure. * Load the ELF segments to memory firstly. */ ret = rproc_load_segments(rproc, fw); if (ret) goto out; /* Start the remote processor */ ret = rproc->ops->start(rproc); if (ret) goto out; rproc->ops->kick(rproc, 0); out: release_firmware(fw); } static __maybe_unused int imx_dsp_suspend(struct device *dev) { struct rproc *rproc = dev_get_drvdata(dev); struct imx_dsp_rproc *priv = rproc->priv; __u32 mmsg = RP_MBOX_SUSPEND_SYSTEM; int ret; if (rproc->state != RPROC_RUNNING) goto out; reinit_completion(&priv->pm_comp); /* Tell DSP that suspend is happening */ ret = mbox_send_message(priv->tx_ch, (void *)&mmsg); if (ret < 0) { dev_err(dev, "PM mbox_send_message failed: %d\n", ret); return ret; } /* * DSP need to save the context at suspend. * Here waiting the response for DSP, then power can be disabled. */ if (!wait_for_completion_timeout(&priv->pm_comp, msecs_to_jiffies(100))) return -EBUSY; out: /* * The power of DSP is disabled in suspend, so force pm runtime * to be suspend, then we can reenable the power and clocks at * resume stage. */ return pm_runtime_force_suspend(dev); } static __maybe_unused int imx_dsp_resume(struct device *dev) { struct rproc *rproc = dev_get_drvdata(dev); int ret = 0; ret = pm_runtime_force_resume(dev); if (ret) return ret; if (rproc->state != RPROC_RUNNING) return 0; /* * The power of DSP is disabled at suspend, the memory of dsp * is reset, the image segments are lost. So need to reload * firmware and restart the DSP if it is in running state. */ ret = request_firmware_nowait(THIS_MODULE, FW_ACTION_UEVENT, rproc->firmware, dev, GFP_KERNEL, rproc, imx_dsp_load_firmware); if (ret < 0) { dev_err(dev, "load firmware failed: %d\n", ret); goto err; } return 0; err: pm_runtime_force_suspend(dev); return ret; } static const struct dev_pm_ops imx_dsp_rproc_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(imx_dsp_suspend, imx_dsp_resume) SET_RUNTIME_PM_OPS(imx_dsp_runtime_suspend, imx_dsp_runtime_resume, NULL) }; static const struct of_device_id imx_dsp_rproc_of_match[] = { { .compatible = "fsl,imx8qxp-hifi4", .data = &imx_dsp_rproc_cfg_imx8qxp }, { .compatible = "fsl,imx8qm-hifi4", .data = &imx_dsp_rproc_cfg_imx8qm }, { .compatible = "fsl,imx8mp-hifi4", .data = &imx_dsp_rproc_cfg_imx8mp }, { .compatible = "fsl,imx8ulp-hifi4", .data = &imx_dsp_rproc_cfg_imx8ulp }, {}, }; MODULE_DEVICE_TABLE(of, imx_dsp_rproc_of_match); static struct platform_driver imx_dsp_rproc_driver = { .probe = imx_dsp_rproc_probe, .remove = imx_dsp_rproc_remove, .driver = { .name = "imx-dsp-rproc", .of_match_table = imx_dsp_rproc_of_match, .pm = &imx_dsp_rproc_pm_ops, }, }; module_platform_driver(imx_dsp_rproc_driver); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("i.MX HiFi Core Remote Processor Control Driver"); MODULE_AUTHOR("Shengjiu Wang ");