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Thu, 31 Oct 2024 20:47:34 +0000 (GMT) Received: from eusmgms1.samsung.com (unknown [182.198.249.179]) by eusmtrp2.samsung.com (KnoxPortal) with ESMTP id 20241031204734eusmtrp2373c40e9c0baaae21f183a7fec87160c~DpJf38rAy1392413924eusmtrp2u; Thu, 31 Oct 2024 20:47:34 +0000 (GMT) X-AuditID: cbfec7f5-e59c770000004fad-55-6723ece74606 Received: from eusmtip1.samsung.com ( [203.254.199.221]) by eusmgms1.samsung.com (EUCPMTA) with SMTP id F7.53.19920.6ECE3276; Thu, 31 Oct 2024 20:47:34 +0000 (GMT) Received: from AMDC4942.home (unknown [106.210.136.40]) by eusmtip1.samsung.com (KnoxPortal) with ESMTPA id 20241031204733eusmtip1acf139a23240eadc0e8953ee0ee8e5be~DpJfDylTx1276712767eusmtip1q; Thu, 31 Oct 2024 20:47:33 +0000 (GMT) From: Michal Wilczynski To: drew@pdp7.com, guoren@kernel.org, wefu@redhat.com, jassisinghbrar@gmail.com, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, m.szyprowski@samsung.com, samuel.holland@sifive.com, emil.renner.berthing@canonical.com Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Michal Wilczynski Subject: [PATCH v5 1/3] mailbox: Introduce support for T-head TH1520 Mailbox driver Date: Thu, 31 Oct 2024 21:47:21 +0100 Message-Id: <20241031204723.1149912-2-m.wilczynski@samsung.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241031204723.1149912-1-m.wilczynski@samsung.com> MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrMKsWRmVeSWpSXmKPExsWy7djPc7rP3yinG7z9oG2x9fcsdos1e88x Wcw/co7V4t6lLUwWlzpXMFq82NvIYnFtxVx2i5ez7rFZXN41h81i2+cWNou1R+6yW6z/Op/J 4uXlHmaLtln8Fv/37GC3WH3uCotFy/4pLA6CHrMaetk83rx8yeJxuOMLu8fOWXfZPTat6mTz 2Lyk3qNl7TEmj/f7rrJ59G1Zxehxqfk6u8fnTXIB3FFcNimpOZllqUX6dglcGY8P3mcq2LSA seJ0fytzA+PfFsYuRk4OCQETiX2d+9m6GLk4hARWMEpMv7ybHcL5wigx8fRpFgjnM6PEic97 2WBa/p98yQyRWM4o8f1iCyuE84ZR4t3kHlaQKjYBI4kHy+eDJUQE1jNJPNu9DGwws0Avo8TU vTOZQKqEBUIlet7cATuFRUBVYvuPx2A7eAXsJbYsXs8CsU9eYv/Bs8wgNqeAg8TsXa3sEDWC EidnPgGrYQaqad46G+wmCYHNnBLtx98yQTS7SOxqmMAKYQtLvDq+hR3ClpH4v3M+VE2+xIOt n5gh7BqJnT3HoWxriTvnfgEdxAG0QFNi/S59iLCjRO/mo8wgYQkBPokbbwUhTuCTmLRtOlSY V6KjTQiiWk1iak8v3NJzK7ZBLfWQmP/qJdMERsVZSJ6ZheSZWQh7FzAyr2IUTy0tzk1PLTbO Sy3XK07MLS7NS9dLzs/dxAhMh6f/Hf+6g3HFq496hxiZOBgPMUpwMCuJ8H4oUE4X4k1JrKxK LcqPLyrNSS0+xCjNwaIkzquaIp8qJJCeWJKanZpakFoEk2Xi4JRqYOr73iRoxKhf8Xhz82H7 4CkPb621nPk4c+WviH6Jjcm5JcmBWRJlVdrMGXPOv/SO0tRct0lb0vs0P3PKTUNXJatzbAKe Lcd/7Gg++vqSJOvUiB1inzY0T3992PbZC/E32yrazCerXol/suKxYuS3I4pMcw/FRc+wnu9l dVi8crVDuuXjNeXJGpze60U/sgs8nfH6hH7k58nHv9orqq88Lj/vz98jsy1+nE3cXH7m5xTh p9I2Lufn2blKbvOcFZfkdKn8/UH3M+3ODHWOk1ZNuhTeuv3wWq//c2SUw75MCV9y6JjPvoff dnLM041Q8kosMvdobW2QDA3RNxY/d8Tx+rLP5xO/Pj705tbSbSZpMrpKLMUZiYZazEXFiQDP 27Dn9gMAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrAIsWRmVeSWpSXmKPExsVy+t/xu7rP3iinGyy4LGqx9fcsdos1e88x Wcw/co7V4t6lLUwWlzpXMFq82NvIYnFtxVx2i5ez7rFZXN41h81i2+cWNou1R+6yW6z/Op/J 4uXlHmaLtln8Fv/37GC3WH3uCotFy/4pLA6CHrMaetk83rx8yeJxuOMLu8fOWXfZPTat6mTz 2Lyk3qNl7TEmj/f7rrJ59G1Zxehxqfk6u8fnTXIB3FF6NkX5pSWpChn5xSW2StGGFkZ6hpYW ekYmlnqGxuaxVkamSvp2NimpOZllqUX6dgl6GY8P3mcq2LSAseJ0fytzA+PfFsYuRk4OCQET if8nXzJ3MXJxCAksZZR4vH4xO0RCRuJa90sWCFtY4s+1LjYQW0jgFaPE03YjEJtNwEjiwfL5 rCC2iMB+JonXZ4tABjELTGSUuDn3PtgGYYFgifvnrzCB2CwCqhLbfzwGG8QrYC+xZfF6qAXy EvsPnmUGsTkFHCRm72plh1hmL3G0dQ87RL2gxMmZT8DqmYHqm7fOZp7AKDALSWoWktQCRqZV jCKppcW56bnFhnrFibnFpXnpesn5uZsYgVG77djPzTsY5736qHeIkYmD8RCjBAezkgjvhwLl dCHelMTKqtSi/Pii0pzU4kOMpkB3T2SWEk3OB6aNvJJ4QzMDU0MTM0sDU0szYyVxXrfL59OE BNITS1KzU1MLUotg+pg4OKUamA7+fPyqS2rlJnbROfPaGmr+sZ+vVV77sObE4k37rjUeyt2h U7lIw0lshtqVeUd3x5QINccvnnTo0LnS9/ZdWnrXbv85dFCL377v1Welv8qr5+87xnrHU7Fh 8aNrP1fG6FjIq651qFNqfXIs8wR31DXzBg2G37tVyo8lT0nuUuFYtT4nt+JnNrNY00GVJZIb 189bIFy/23ZGZK9aV2TDrCMzG90K241bHXf0J3/wfrz3zxuWWBP7D717Wb3eXpm5oOfNIZmJ b1Y+ChFQn/Zn6xLuzJvcBZmRUx78FbRrM/XtNbzqtFEr2PLARwvVWVxP+Mw/Hkg+t+R6cW8t i2T8t1yJJc3LFir/XsyT2WM9yV2JpTgj0VCLuag4EQDnxE+RYwMAAA== X-CMS-MailID: 20241031204734eucas1p1ec2a8a101e805802a851b01d87709061 X-Msg-Generator: CA X-RootMTR: 20241031204734eucas1p1ec2a8a101e805802a851b01d87709061 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20241031204734eucas1p1ec2a8a101e805802a851b01d87709061 References: <20241031204723.1149912-1-m.wilczynski@samsung.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241031_134741_115183_3BCF7E98 X-CRM114-Status: GOOD ( 31.44 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org This driver was tested using the drm/imagination GPU driver. It was able to successfully power on the GPU, by passing a command through mailbox from E910 core to E902 that's responsible for powering up the GPU. The GPU driver was able to read the BVNC version from control registers, which confirms it was successfully powered on. [ 33.957467] powervr ffef400000.gpu: [drm] loaded firmware powervr/rogue_36.52.104.182_v1.fw [ 33.966008] powervr ffef400000.gpu: [drm] FW version v1.0 (build 6621747 OS) [ 38.978542] powervr ffef400000.gpu: [drm] *ERROR* Firmware failed to boot Though the driver still fails to boot the firmware, the mailbox driver works when used with the not-yet-upstreamed firmware AON driver. There is ongoing work to get the BXM-4-64 supported with the drm/imagination driver [1], though it's not completed yet. This work is based on the driver from the vendor kernel [2]. Link: https://gitlab.freedesktop.org/imagination/linux-firmware/-/issues/2 [1] Link: https://github.com/revyos/thead-kernel.git [2] Signed-off-by: Michal Wilczynski --- MAINTAINERS | 1 + drivers/mailbox/Kconfig | 10 + drivers/mailbox/Makefile | 2 + drivers/mailbox/mailbox-th1520.c | 592 +++++++++++++++++++++++++++++++ 4 files changed, 605 insertions(+) create mode 100644 drivers/mailbox/mailbox-th1520.c diff --git a/MAINTAINERS b/MAINTAINERS index a27407950242..df36684221ff 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -19818,6 +19818,7 @@ T: git https://github.com/pdp7/linux.git F: Documentation/devicetree/bindings/clock/thead,th1520-clk-ap.yaml F: arch/riscv/boot/dts/thead/ F: drivers/clk/thead/clk-th1520-ap.c +F: drivers/mailbox/mailbox-th1520.c F: include/dt-bindings/clock/thead,th1520-clk-ap.h RNBD BLOCK DRIVERS diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig index 6fb995778636..52f8162896f5 100644 --- a/drivers/mailbox/Kconfig +++ b/drivers/mailbox/Kconfig @@ -295,4 +295,14 @@ config QCOM_IPCC acts as an interrupt controller for receiving interrupts from clients. Say Y here if you want to build this driver. +config THEAD_TH1520_MBOX + tristate "T-head TH1520 Mailbox" + depends on ARCH_THEAD || COMPILE_TEST + help + Mailbox driver implementation for the Thead TH-1520 platform. Enables + two cores within the SoC to communicate and coordinate by passing + messages. Could be used to communicate between E910 core, on which the + kernel is running, and E902 core used for power management among other + things. + endif diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile index 3c3c27d54c13..5f4f5b0ce2cc 100644 --- a/drivers/mailbox/Makefile +++ b/drivers/mailbox/Makefile @@ -64,3 +64,5 @@ obj-$(CONFIG_SPRD_MBOX) += sprd-mailbox.o obj-$(CONFIG_QCOM_CPUCP_MBOX) += qcom-cpucp-mbox.o obj-$(CONFIG_QCOM_IPCC) += qcom-ipcc.o + +obj-$(CONFIG_THEAD_TH1520_MBOX) += mailbox-th1520.o diff --git a/drivers/mailbox/mailbox-th1520.c b/drivers/mailbox/mailbox-th1520.c new file mode 100644 index 000000000000..d24861025a47 --- /dev/null +++ b/drivers/mailbox/mailbox-th1520.c @@ -0,0 +1,592 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2021 Alibaba Group Holding Limited. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* Status Register */ +#define TH_1520_MBOX_STA 0x0 +#define TH_1520_MBOX_CLR 0x4 +#define TH_1520_MBOX_MASK 0xc + +/* Transmit/receive data register: + * INFO0 ~ INFO6 + */ +#define TH_1520_MBOX_INFO_NUM 8 +#define TH_1520_MBOX_DATA_INFO_NUM 7 +#define TH_1520_MBOX_INFO0 0x14 +/* Transmit ack register: INFO7 */ +#define TH_1520_MBOX_INFO7 0x30 + +/* Generate remote icu IRQ Register */ +#define TH_1520_MBOX_GEN 0x10 +#define TH_1520_MBOX_GEN_RX_DATA BIT(6) +#define TH_1520_MBOX_GEN_TX_ACK BIT(7) + +#define TH_1520_MBOX_CHAN_RES_SIZE 0x1000 +#define TH_1520_MBOX_CHANS 4 +#define TH_1520_MBOX_CHAN_NAME_SIZE 20 + +#define TH_1520_MBOX_ACK_MAGIC 0xdeadbeaf + +#ifdef CONFIG_PM_SLEEP +/* store MBOX context across system-wide suspend/resume transitions */ +struct th1520_mbox_context { + u32 intr_mask[TH_1520_MBOX_CHANS - 1]; +}; +#endif + +enum th1520_mbox_icu_cpu_id { + TH_1520_MBOX_ICU_KERNEL_CPU0, /* 910T */ + TH_1520_MBOX_ICU_CPU1, /* 902 */ + TH_1520_MBOX_ICU_CPU2, /* 906 */ + TH_1520_MBOX_ICU_CPU3, /* 910R */ +}; + +struct th1520_mbox_con_priv { + enum th1520_mbox_icu_cpu_id idx; + void __iomem *comm_local_base; + void __iomem *comm_remote_base; + char irq_desc[TH_1520_MBOX_CHAN_NAME_SIZE]; + struct mbox_chan *chan; +}; + +struct th1520_mbox_priv { + struct device *dev; + void __iomem *local_icu[TH_1520_MBOX_CHANS]; + void __iomem *remote_icu[TH_1520_MBOX_CHANS - 1]; + void __iomem *cur_cpu_ch_base; + spinlock_t mbox_lock; /* control register lock */ + + struct mbox_controller mbox; + struct mbox_chan mbox_chans[TH_1520_MBOX_CHANS]; + struct clk_bulk_data clocks[TH_1520_MBOX_CHANS]; + struct th1520_mbox_con_priv con_priv[TH_1520_MBOX_CHANS]; + int irq; +#ifdef CONFIG_PM_SLEEP + struct th1520_mbox_context *ctx; +#endif +}; + +static struct th1520_mbox_priv * +to_th1520_mbox_priv(struct mbox_controller *mbox) +{ + return container_of(mbox, struct th1520_mbox_priv, mbox); +} + +static void th1520_mbox_write(struct th1520_mbox_priv *priv, u32 val, u32 offs) +{ + iowrite32(val, priv->cur_cpu_ch_base + offs); +} + +static u32 th1520_mbox_read(struct th1520_mbox_priv *priv, u32 offs) +{ + return ioread32(priv->cur_cpu_ch_base + offs); +} + +static u32 th1520_mbox_rmw(struct th1520_mbox_priv *priv, u32 off, u32 set, + u32 clr) +{ + unsigned long flags; + u32 val; + + spin_lock_irqsave(&priv->mbox_lock, flags); + val = th1520_mbox_read(priv, off); + val &= ~clr; + val |= set; + th1520_mbox_write(priv, val, off); + spin_unlock_irqrestore(&priv->mbox_lock, flags); + + return val; +} + +static void th1520_mbox_chan_write(struct th1520_mbox_con_priv *cp, u32 val, + u32 offs, bool is_remote) +{ + if (is_remote) + iowrite32(val, cp->comm_remote_base + offs); + else + iowrite32(val, cp->comm_local_base + offs); +} + +static u32 th1520_mbox_chan_read(struct th1520_mbox_con_priv *cp, u32 offs, + bool is_remote) +{ + if (is_remote) + return ioread32(cp->comm_remote_base + offs); + else + return ioread32(cp->comm_local_base + offs); +} + +static void th1520_mbox_chan_rmw(struct th1520_mbox_con_priv *cp, u32 off, + u32 set, u32 clr, bool is_remote) +{ + struct th1520_mbox_priv *priv = to_th1520_mbox_priv(cp->chan->mbox); + unsigned long flags; + u32 val; + + spin_lock_irqsave(&priv->mbox_lock, flags); + val = th1520_mbox_chan_read(cp, off, is_remote); + val &= ~clr; + val |= set; + th1520_mbox_chan_write(cp, val, off, is_remote); + spin_unlock_irqrestore(&priv->mbox_lock, flags); +} + +static void th1520_mbox_chan_rd_data(struct th1520_mbox_con_priv *cp, + void *data, bool is_remote) +{ + u32 off = TH_1520_MBOX_INFO0; + u32 *arg = data; + u32 i; + + /* read info0 ~ info6, totally 28 bytes + * requires data memory size is 28 bytes + */ + for (i = 0; i < TH_1520_MBOX_DATA_INFO_NUM; i++) { + *arg = th1520_mbox_chan_read(cp, off, is_remote); + off += 4; + arg++; + } +} + +static void th1520_mbox_chan_wr_data(struct th1520_mbox_con_priv *cp, + void *data, bool is_remote) +{ + u32 off = TH_1520_MBOX_INFO0; + u32 *arg = data; + u32 i; + + /* write info0 ~ info6, totally 28 bytes + * requires data memory is 28 bytes valid data + */ + for (i = 0; i < TH_1520_MBOX_DATA_INFO_NUM; i++) { + th1520_mbox_chan_write(cp, *arg, off, is_remote); + off += 4; + arg++; + } +} + +static void th1520_mbox_chan_wr_ack(struct th1520_mbox_con_priv *cp, void *data, + bool is_remote) +{ + u32 off = TH_1520_MBOX_INFO7; + u32 *arg = data; + + th1520_mbox_chan_write(cp, *arg, off, is_remote); +} + +static int th1520_mbox_chan_id_to_mapbit(struct th1520_mbox_con_priv *cp) +{ + int mapbit = 0; + int i; + + for (i = 0; i < TH_1520_MBOX_CHANS; i++) { + if (i == cp->idx) + return mapbit; + + if (i != TH_1520_MBOX_ICU_KERNEL_CPU0) + mapbit++; + } + + if (i == TH_1520_MBOX_CHANS) + dev_err(cp->chan->mbox->dev, "convert to mapbit failed\n"); + + return 0; +} + +static irqreturn_t th1520_mbox_isr(int irq, void *p) +{ + struct mbox_chan *chan = p; + struct th1520_mbox_priv *priv = to_th1520_mbox_priv(chan->mbox); + struct th1520_mbox_con_priv *cp = chan->con_priv; + int mapbit = th1520_mbox_chan_id_to_mapbit(cp); + u32 sta, dat[TH_1520_MBOX_DATA_INFO_NUM]; + u32 ack_magic = TH_1520_MBOX_ACK_MAGIC; + u32 info0_data, info7_data; + + sta = th1520_mbox_read(priv, TH_1520_MBOX_STA); + if (!(sta & BIT(mapbit))) + return IRQ_NONE; + + /* clear chan irq bit in STA register */ + th1520_mbox_rmw(priv, TH_1520_MBOX_CLR, BIT(mapbit), 0); + + /* info0 is the protocol word, should not be zero! */ + info0_data = th1520_mbox_chan_read(cp, TH_1520_MBOX_INFO0, false); + if (info0_data) { + /* read info0~info6 data */ + th1520_mbox_chan_rd_data(cp, dat, false); + + /* clear local info0 */ + th1520_mbox_chan_write(cp, 0x0, TH_1520_MBOX_INFO0, false); + + /* notify remote cpu */ + th1520_mbox_chan_wr_ack(cp, &ack_magic, true); + /* CPU1 902/906 use polling mode to monitor info7 */ + if (cp->idx != TH_1520_MBOX_ICU_CPU1 && + cp->idx != TH_1520_MBOX_ICU_CPU2) + th1520_mbox_chan_rmw(cp, TH_1520_MBOX_GEN, + TH_1520_MBOX_GEN_TX_ACK, 0, true); + + /* transfer the data to client */ + mbox_chan_received_data(chan, (void *)dat); + } + + /* info7 magic value mean the real ack signal, not generate bit7 */ + info7_data = th1520_mbox_chan_read(cp, TH_1520_MBOX_INFO7, false); + if (info7_data == TH_1520_MBOX_ACK_MAGIC) { + /* clear local info7 */ + th1520_mbox_chan_write(cp, 0x0, TH_1520_MBOX_INFO7, false); + + /* notify framework the last TX has completed */ + mbox_chan_txdone(chan, 0); + } + + if (!info0_data && !info7_data) + return IRQ_NONE; + + return IRQ_HANDLED; +} + +static int th1520_mbox_send_data(struct mbox_chan *chan, void *data) +{ + struct th1520_mbox_con_priv *cp = chan->con_priv; + + th1520_mbox_chan_wr_data(cp, data, true); + th1520_mbox_chan_rmw(cp, TH_1520_MBOX_GEN, TH_1520_MBOX_GEN_RX_DATA, 0, + true); + return 0; +} + +static int th1520_mbox_startup(struct mbox_chan *chan) +{ + struct th1520_mbox_priv *priv = to_th1520_mbox_priv(chan->mbox); + struct th1520_mbox_con_priv *cp = chan->con_priv; + u32 data[8] = {}; + int mask_bit; + int ret; + + /* clear local and remote generate and info0~info7 */ + th1520_mbox_chan_rmw(cp, TH_1520_MBOX_GEN, 0x0, 0xff, true); + th1520_mbox_chan_rmw(cp, TH_1520_MBOX_GEN, 0x0, 0xff, false); + th1520_mbox_chan_wr_ack(cp, &data[7], true); + th1520_mbox_chan_wr_ack(cp, &data[7], false); + th1520_mbox_chan_wr_data(cp, &data[0], true); + th1520_mbox_chan_wr_data(cp, &data[0], false); + + /* enable the chan mask */ + mask_bit = th1520_mbox_chan_id_to_mapbit(cp); + th1520_mbox_rmw(priv, TH_1520_MBOX_MASK, BIT(mask_bit), 0); + + /* + * Mixing devm_ managed resources with manual IRQ handling is generally + * discouraged due to potential complexities with resource management, + * especially when dealing with shared interrupts. However, in this case, + * the approach is safe and effective because: + * + * 1. Each mailbox channel requests its IRQ within the .startup() callback + * and frees it within the .shutdown() callback. + * 2. During device unbinding, the devm_ managed mailbox controller first + * iterates through all channels, ensuring that their IRQs are freed before + * any other devm_ resources are released. + * + * This ordering guarantees that no interrupts can be triggered from the device + * while it is being unbound, preventing race conditions and ensuring system + * stability. + */ + ret = request_irq(priv->irq, th1520_mbox_isr, + IRQF_SHARED | IRQF_NO_SUSPEND, cp->irq_desc, chan); + if (ret) { + dev_err(priv->dev, "Unable to acquire IRQ %d\n", priv->irq); + return ret; + } + + return 0; +} + +static void th1520_mbox_shutdown(struct mbox_chan *chan) +{ + struct th1520_mbox_priv *priv = to_th1520_mbox_priv(chan->mbox); + struct th1520_mbox_con_priv *cp = chan->con_priv; + int mask_bit; + + free_irq(priv->irq, chan); + + /* clear the chan mask */ + mask_bit = th1520_mbox_chan_id_to_mapbit(cp); + th1520_mbox_rmw(priv, TH_1520_MBOX_MASK, 0, BIT(mask_bit)); +} + +static const struct mbox_chan_ops th1520_mbox_ops = { + .send_data = th1520_mbox_send_data, + .startup = th1520_mbox_startup, + .shutdown = th1520_mbox_shutdown, +}; + +static int th1520_mbox_init_generic(struct th1520_mbox_priv *priv) +{ +#ifdef CONFIG_PM_SLEEP + priv->ctx = devm_kzalloc(priv->dev, sizeof(*priv->ctx), GFP_KERNEL); + if (!priv->ctx) + return -ENOMEM; +#endif + /* Set default configuration */ + th1520_mbox_write(priv, 0xff, TH_1520_MBOX_CLR); + th1520_mbox_write(priv, 0x0, TH_1520_MBOX_MASK); + return 0; +} + +static struct mbox_chan *th1520_mbox_xlate(struct mbox_controller *mbox, + const struct of_phandle_args *sp) +{ + u32 chan; + + if (sp->args_count != 1) { + dev_err(mbox->dev, "Invalid argument count %d\n", + sp->args_count); + return ERR_PTR(-EINVAL); + } + + chan = sp->args[0]; /* comm remote channel */ + + if (chan >= mbox->num_chans) { + dev_err(mbox->dev, "Not supported channel number: %d\n", chan); + return ERR_PTR(-EINVAL); + } + + if (chan == TH_1520_MBOX_ICU_KERNEL_CPU0) { + dev_err(mbox->dev, "Cannot communicate with yourself\n"); + return ERR_PTR(-EINVAL); + } + + return &mbox->chans[chan]; +} + +static void __iomem *th1520_map_mmio(struct platform_device *pdev, + char *res_name, size_t offset) +{ + void __iomem *mapped; + struct resource *res; + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, res_name); + + if (!res) { + dev_err(&pdev->dev, "Failed to get resource: %s\n", res_name); + return ERR_PTR(-EINVAL); + } + + mapped = devm_ioremap(&pdev->dev, res->start + offset, + resource_size(res) - offset); + if (IS_ERR(mapped)) + dev_err(&pdev->dev, "Failed to map resource: %s\n", res_name); + + return mapped; +} + +static int th1520_mbox_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct th1520_mbox_priv *priv; + unsigned int remote_idx = 0; + unsigned int i; + int ret; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->dev = dev; + + priv->clocks[0].id = "clk-local"; + priv->clocks[1].id = "clk-remote-icu0"; + priv->clocks[2].id = "clk-remote-icu1"; + priv->clocks[3].id = "clk-remote-icu2"; + + ret = devm_clk_bulk_get(dev, ARRAY_SIZE(priv->clocks), + priv->clocks); + if (ret) { + dev_err(dev, "Failed to get clocks\n"); + return ret; + } + + ret = clk_bulk_prepare_enable(ARRAY_SIZE(priv->clocks), priv->clocks); + if (ret) { + dev_err(dev, "Failed to enable clocks\n"); + return ret; + } + + /* + * The address mappings in the device tree align precisely with those + * outlined in the manual. However, register offsets within these + * mapped regions are irregular, particularly for remote-icu0. + * Consequently, th1520_map_mmio() requires an additional parameter to + * handle this quirk. + */ + priv->local_icu[TH_1520_MBOX_ICU_KERNEL_CPU0] = + th1520_map_mmio(pdev, "local", 0x0); + if (IS_ERR(priv->local_icu[TH_1520_MBOX_ICU_KERNEL_CPU0])) + return PTR_ERR(priv->local_icu[TH_1520_MBOX_ICU_KERNEL_CPU0]); + + priv->remote_icu[0] = th1520_map_mmio(pdev, "remote-icu0", 0x4000); + if (IS_ERR(priv->remote_icu[0])) + return PTR_ERR(priv->remote_icu[0]); + + priv->remote_icu[1] = th1520_map_mmio(pdev, "remote-icu1", 0x0); + if (IS_ERR(priv->remote_icu[1])) + return PTR_ERR(priv->remote_icu[1]); + + priv->remote_icu[2] = th1520_map_mmio(pdev, "remote-icu2", 0x0); + if (IS_ERR(priv->remote_icu[2])) + return PTR_ERR(priv->remote_icu[2]); + + priv->local_icu[TH_1520_MBOX_ICU_CPU1] = + priv->local_icu[TH_1520_MBOX_ICU_KERNEL_CPU0] + + TH_1520_MBOX_CHAN_RES_SIZE; + priv->local_icu[TH_1520_MBOX_ICU_CPU2] = + priv->local_icu[TH_1520_MBOX_ICU_CPU1] + + TH_1520_MBOX_CHAN_RES_SIZE; + priv->local_icu[TH_1520_MBOX_ICU_CPU3] = + priv->local_icu[TH_1520_MBOX_ICU_CPU2] + + TH_1520_MBOX_CHAN_RES_SIZE; + + priv->cur_cpu_ch_base = priv->local_icu[TH_1520_MBOX_ICU_KERNEL_CPU0]; + + priv->irq = platform_get_irq(pdev, 0); + if (priv->irq < 0) + return priv->irq; + + /* init the chans */ + for (i = 0; i < TH_1520_MBOX_CHANS; i++) { + struct th1520_mbox_con_priv *cp = &priv->con_priv[i]; + + cp->idx = i; + cp->chan = &priv->mbox_chans[i]; + priv->mbox_chans[i].con_priv = cp; + snprintf(cp->irq_desc, sizeof(cp->irq_desc), + "th1520_mbox_chan[%i]", cp->idx); + + cp->comm_local_base = priv->local_icu[i]; + if (i != TH_1520_MBOX_ICU_KERNEL_CPU0) { + cp->comm_remote_base = priv->remote_icu[remote_idx]; + remote_idx++; + } + } + + spin_lock_init(&priv->mbox_lock); + + priv->mbox.dev = dev; + priv->mbox.ops = &th1520_mbox_ops; + priv->mbox.chans = priv->mbox_chans; + priv->mbox.num_chans = TH_1520_MBOX_CHANS; + priv->mbox.of_xlate = th1520_mbox_xlate; + priv->mbox.txdone_irq = true; + + platform_set_drvdata(pdev, priv); + + ret = th1520_mbox_init_generic(priv); + if (ret) { + dev_err(dev, "Failed to init mailbox context\n"); + return ret; + } + + return devm_mbox_controller_register(dev, &priv->mbox); +} + +static void th1520_mbox_remove(struct platform_device *pdev) +{ + struct th1520_mbox_priv *priv = platform_get_drvdata(pdev); + + clk_bulk_disable_unprepare(ARRAY_SIZE(priv->clocks), priv->clocks); +} + +static const struct of_device_id th1520_mbox_dt_ids[] = { + { .compatible = "thead,th1520-mbox" }, + {} +}; +MODULE_DEVICE_TABLE(of, th1520_mbox_dt_ids); + +#ifdef CONFIG_PM_SLEEP +static int __maybe_unused th1520_mbox_suspend_noirq(struct device *dev) +{ + struct th1520_mbox_priv *priv = dev_get_drvdata(dev); + struct th1520_mbox_context *ctx = priv->ctx; + u32 i; + /* + * ONLY interrupt mask bit should be stored and restores. + * INFO data all assumed to be lost. + */ + for (i = 0; i < TH_1520_MBOX_CHANS; i++) { + ctx->intr_mask[i] = + ioread32(priv->local_icu[i] + TH_1520_MBOX_MASK); + } + return 0; +} + +static int __maybe_unused th1520_mbox_resume_noirq(struct device *dev) +{ + struct th1520_mbox_priv *priv = dev_get_drvdata(dev); + struct th1520_mbox_context *ctx = priv->ctx; + u32 i; + + for (i = 0; i < TH_1520_MBOX_CHANS; i++) { + iowrite32(ctx->intr_mask[i], + priv->local_icu[i] + TH_1520_MBOX_MASK); + } + + return 0; +} +#endif + +static int __maybe_unused th1520_mbox_runtime_suspend(struct device *dev) +{ + struct th1520_mbox_priv *priv = dev_get_drvdata(dev); + + clk_bulk_disable_unprepare(ARRAY_SIZE(priv->clocks), priv->clocks); + + return 0; +} + +static int __maybe_unused th1520_mbox_runtime_resume(struct device *dev) +{ + struct th1520_mbox_priv *priv = dev_get_drvdata(dev); + int ret; + + ret = clk_bulk_prepare_enable(ARRAY_SIZE(priv->clocks), priv->clocks); + if (ret) + dev_err(dev, "Failed to enable clocks in runtime resume\n"); + + return ret; +} + +static const struct dev_pm_ops th1520_mbox_pm_ops = { +#ifdef CONFIG_PM_SLEEP + SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(th1520_mbox_suspend_noirq, + th1520_mbox_resume_noirq) +#endif + SET_RUNTIME_PM_OPS(th1520_mbox_runtime_suspend, + th1520_mbox_runtime_resume, NULL) +}; + +static struct platform_driver th1520_mbox_driver = { + .probe = th1520_mbox_probe, + .remove = th1520_mbox_remove, + .driver = { + .name = "th1520-mbox", + .of_match_table = th1520_mbox_dt_ids, + .pm = &th1520_mbox_pm_ops, + }, +}; +module_platform_driver(th1520_mbox_driver); + +MODULE_DESCRIPTION("Thead TH-1520 mailbox IPC driver"); +MODULE_LICENSE("GPL"); From patchwork Thu Oct 31 20:47:22 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michal Wilczynski X-Patchwork-Id: 13858353 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id AC9B1E67486 for ; Thu, 31 Oct 2024 20:47:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; 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Thu, 31 Oct 2024 20:47:34 +0000 (GMT) From: Michal Wilczynski To: drew@pdp7.com, guoren@kernel.org, wefu@redhat.com, jassisinghbrar@gmail.com, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, m.szyprowski@samsung.com, samuel.holland@sifive.com, emil.renner.berthing@canonical.com Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Michal Wilczynski , Krzysztof Kozlowski Subject: [PATCH v5 2/3] dt-bindings: mailbox: Add thead,th1520-mailbox bindings Date: Thu, 31 Oct 2024 21:47:22 +0100 Message-Id: <20241031204723.1149912-3-m.wilczynski@samsung.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241031204723.1149912-1-m.wilczynski@samsung.com> MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrJKsWRmVeSWpSXmKPExsWy7djPc7rP3yinGxy5bGWx9fcsdos1e88x Wcw/co7V4t6lLUwWlzpXMFq82NvIYnFtxVx2i5ez7rFZ7H29ld3i8q45bBbbPrewWaw9cpfd Yv3X+UwWLy/3MFu0zeK3+L9nB7vF6nNXWCxa9k9hcRDymNXQy+bx5uVLFo/DHV/YPXbOusvu sWlVJ5vHnWt72Dw2L6n3aFl7jMnj/b6rbB59W1Yxelxqvs7u8XmTXABPFJdNSmpOZllqkb5d AlfGxw8T2QtWy1Vsv3qIuYFxm3gXIyeHhICJxJZvE9i7GLk4hARWMEpsfHyFHSQhJPCFUWLp TmWIxGdGic/3HzDDdLy4/oENIrGcUWL63Cao9jeMEg8bzjKBVLEJGEk8WD6fFSQhIrCeSeLZ 7mVgVcwCRxklNkx7CrZEWCBQ4sH6LWAdLAKqElO/vgKL8wrYS7ycdIIdYp+8xP6DZ8F2cwo4 SMze1QpVIyhxcuYTFhCbGaimeetsqPt2c0p8fAL1nYtEw/V5jBC2sMSr41ugZspInJ7cwwJh 50s82PoJqrdGYmfPcSjbWuLOuV9Af3IAzdeUWL9LHyLsKLG15zc7SFhCgE/ixltBiAv4JCZt m84MEeaV6GgTgqhWk5ja0wu39NyKbUwQtofEr0cX2CcwKs5C8sssJL/MQti7gJF5FaN4amlx bnpqsVFearlecWJucWleul5yfu4mRmBqPP3v+JcdjMtffdQ7xMjEwXiIUYKDWUmE90OBcroQ b0piZVVqUX58UWlOavEhRmkOFiVxXtUU+VQhgfTEktTs1NSC1CKYLBMHp1QDk6PT5tgJn1m/ s3iJHMi2etTjdFj1ZnTXITmXjReDO1sMehUO3ddPqn8RM5NjWzY/f57jf5vo6oe8P7pKd/Kt Fnh6J4NVbWoOE/f8b2eCZdkXb2vMEll4vyJI//uNDS2b1Nfo/nmxiLF9ddP2rRrrF/ucXN5o +LDi1LllMafu78rX/hvTxmNzTuzcFTefJfYyS//Mqha/3d0SxdJ4b90MH+NdntKnAvdXLrwz r+Nr/4H1U/T43cIyv8YWcq96/SW2+JDrOiaz3G3Cq4JvVnCrbW6r2m+QFTC5QLap7bDzwVLf Rt7N+Wt018rwn1trFTrTsEpA+CPf30CNCX99u6RcYjs1tlysnhwSEpDjsSZViaU4I9FQi7mo OBEAlkSB5PwDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrBIsWRmVeSWpSXmKPExsVy+t/xu7rP3yinG3zpF7DY+nsWu8WaveeY LOYfOcdqce/SFiaLS50rGC1e7G1ksbi2Yi67xctZ99gs9r7eym5xedccNottn1vYLNYeuctu sf7rfCaLl5d7mC3aZvFb/N+zg91i9bkrLBYt+6ewOAh5zGroZfN48/Ili8fhji/sHjtn3WX3 2LSqk83jzrU9bB6bl9R7tKw9xuTxft9VNo++LasYPS41X2f3+LxJLoAnSs+mKL+0JFUhI7+4 xFYp2tDCSM/Q0kLPyMRSz9DYPNbKyFRJ384mJTUnsyy1SN8uQS/j44eJ7AWr5Sq2Xz3E3MC4 TbyLkZNDQsBE4sX1D2xdjFwcQgJLGSVmzzjBDJGQkbjW/ZIFwhaW+HOtC6roFaPE83v3GEES bAJGEg+Wz2cFsUUE9jNJvD5bBGIzC5xklFg8Wx/EFhbwl9g6YSZYDYuAqsTUr6/YQWxeAXuJ l5NOsEMskJfYf/As2GJOAQeJ2btaweJCQDVHW/dA1QtKnJz5hAVivrxE89bZzBMYBWYhSc1C klrAyLSKUSS1tDg3PbfYSK84Mbe4NC9dLzk/dxMjMIq3Hfu5ZQfjylcf9Q4xMnEwHmKU4GBW EuH9UKCcLsSbklhZlVqUH19UmpNafIjRFOjuicxSosn5wDSSVxJvaGZgamhiZmlgamlmrCTO y3blfJqQQHpiSWp2ampBahFMHxMHp1QD00btVe2JXTMcnmyKcJm821462UHzW3fwz81fbCxj nzlO43wqe8ffrPqvyLJWBqk5YacX76gXu3R9/eyctVNUfsjtYXv7aE9P457kYouvmoV/uPy2 7b/f+EuQ5dQhV4eS3xrre29dOPeRu+fXlbwjCnsnML7YkXZo0aTn+xVfBJX0hbC6BgUu1H1U Eckw+17rQ0kZY8nLDlPPu25cWyv7PecsW+uNeWoxl+ayXv1vsfnp5ySVy/XxSvy7vypUKUt/ l1ie9rHMcW7bshuRS6efdr2gY5e/uWfvFjXRU193+gTXuHXtWr1jzZTbz5/mz9ErW2sd9cqq XyPplEvkot8xv02vP020a5wSc2nq1xbONl4lluKMREMt5qLiRAAGgSpUawMAAA== X-CMS-MailID: 20241031204735eucas1p2cfe90f4279c3db29b0af1e61ac29904d X-Msg-Generator: CA X-RootMTR: 20241031204735eucas1p2cfe90f4279c3db29b0af1e61ac29904d X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20241031204735eucas1p2cfe90f4279c3db29b0af1e61ac29904d References: <20241031204723.1149912-1-m.wilczynski@samsung.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241031_134741_118717_8E01034E X-CRM114-Status: GOOD ( 15.78 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Add bindings for the mailbox controller. This work is based on the vendor kernel. [1] Link: https://github.com/revyos/thead-kernel.git [1] Signed-off-by: Michal Wilczynski Reviewed-by: Krzysztof Kozlowski --- .../bindings/mailbox/thead,th1520-mbox.yaml | 89 +++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 90 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/thead,th1520-mbox.yaml diff --git a/Documentation/devicetree/bindings/mailbox/thead,th1520-mbox.yaml b/Documentation/devicetree/bindings/mailbox/thead,th1520-mbox.yaml new file mode 100644 index 000000000000..0971fb97896e --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/thead,th1520-mbox.yaml @@ -0,0 +1,89 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mailbox/thead,th1520-mbox.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: T-head TH1520 Mailbox Controller + +description: + The T-head mailbox controller enables communication and coordination between + cores within the SoC by passing messages (e.g., data, status, and control) + through mailbox channels. It also allows one core to signal another processor + using interrupts via the Interrupt Controller Unit (ICU). + +maintainers: + - Michal Wilczynski + +properties: + compatible: + const: thead,th1520-mbox + + clocks: + items: + - description: Clock for the local mailbox + - description: Clock for remote ICU 0 + - description: Clock for remote ICU 1 + - description: Clock for remote ICU 2 + + clock-names: + items: + - const: clk-local + - const: clk-remote-icu0 + - const: clk-remote-icu1 + - const: clk-remote-icu2 + + reg: + items: + - description: Mailbox local base address + - description: Remote ICU 0 base address + - description: Remote ICU 1 base address + - description: Remote ICU 2 base address + + reg-names: + items: + - const: local + - const: remote-icu0 + - const: remote-icu1 + - const: remote-icu2 + + interrupts: + maxItems: 1 + + '#mbox-cells': + const: 1 + description: + The one and only cell describes destination CPU ID. + +required: + - compatible + - clocks + - clock-names + - reg + - reg-names + - interrupts + - '#mbox-cells' + +additionalProperties: false + +examples: + - | + #include + soc { + #address-cells = <2>; + #size-cells = <2>; + mailbox@ffffc38000 { + compatible = "thead,th1520-mbox"; + reg = <0xff 0xffc38000 0x0 0x4000>, + <0xff 0xffc44000 0x0 0x1000>, + <0xff 0xffc4c000 0x0 0x1000>, + <0xff 0xffc54000 0x0 0x1000>; + reg-names = "local", "remote-icu0", "remote-icu1", "remote-icu2"; + clocks = <&clk CLK_MBOX0>, <&clk CLK_MBOX1>, <&clk CLK_MBOX2>, + <&clk CLK_MBOX3>; + clock-names = "clk-local", "clk-remote-icu0", "clk-remote-icu1", + "clk-remote-icu2"; + interrupts = <28>; + #mbox-cells = <1>; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index df36684221ff..506cdea74694 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -19816,6 +19816,7 @@ L: linux-riscv@lists.infradead.org S: Maintained T: git https://github.com/pdp7/linux.git F: Documentation/devicetree/bindings/clock/thead,th1520-clk-ap.yaml +F: Documentation/devicetree/bindings/mailbox/thead,th1520-mbox.yaml F: arch/riscv/boot/dts/thead/ F: drivers/clk/thead/clk-th1520-ap.c F: drivers/mailbox/mailbox-th1520.c From patchwork Thu Oct 31 20:47:23 2024 Content-Type: text/plain; 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X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Add mailbox device tree node. This work is based on the vendor kernel [1]. Link: https://github.com/revyos/thead-kernel.git [1] Signed-off-by: Michal Wilczynski --- arch/riscv/boot/dts/thead/th1520.dtsi | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/arch/riscv/boot/dts/thead/th1520.dtsi b/arch/riscv/boot/dts/thead/th1520.dtsi index 6992060e6a54..89de5634d3d3 100644 --- a/arch/riscv/boot/dts/thead/th1520.dtsi +++ b/arch/riscv/boot/dts/thead/th1520.dtsi @@ -520,6 +520,22 @@ timer7: timer@ffffc3303c { status = "disabled"; }; + mbox_910t: mailbox@ffffc38000 { + compatible = "thead,th1520-mbox"; + reg = <0xff 0xffc38000 0x0 0x6000>, + <0xff 0xffc40000 0x0 0x6000>, + <0xff 0xffc4c000 0x0 0x2000>, + <0xff 0xffc54000 0x0 0x2000>; + reg-names = "local", "remote-icu0", "remote-icu1", "remote-icu2"; + clocks = <&clk CLK_MBOX0>, <&clk CLK_MBOX1>, <&clk CLK_MBOX2>, + <&clk CLK_MBOX3>; + clock-names = "clk-local", "clk-remote-icu0", "clk-remote-icu1", + "clk-remote-icu2"; + interrupt-parent = <&plic>; + interrupts = <28 IRQ_TYPE_LEVEL_HIGH>; + #mbox-cells = <1>; + }; + ao_gpio0: gpio@fffff41000 { compatible = "snps,dw-apb-gpio"; reg = <0xff 0xfff41000 0x0 0x1000>;