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Wed, 21 Aug 2024 16:29:03 +0800 Received: from mhfsdcap04.gcn.mediatek.inc (10.17.3.154) by mtkmbs11n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Wed, 21 Aug 2024 16:29:03 +0800 From: friday.yang To: Krzysztof Kozlowski , Rob Herring , Conor Dooley , Matthias Brugger , AngeloGioacchino Del Regno CC: Yong Wu , Philipp Zabel , Friday Yang , , , , , Subject: [PATCH 3/4] memory: mtk-smi: mt8188: Add SMI clamp function Date: Wed, 21 Aug 2024 16:26:51 +0800 Message-ID: <20240821082845.11792-4-friday.yang@mediatek.com> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240821082845.11792-1-friday.yang@mediatek.com> References: <20240821082845.11792-1-friday.yang@mediatek.com> MIME-Version: 1.0 X-TM-AS-Product-Ver: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-AS-Result: No-10--0.482200-8.000000 X-TMASE-MatchedRID: qyOEDd16wS2E9zgVMk3pXnTnOygHVQpO87QrIQgH3y1F/5XzBv3ecmb6 PphVtfZggq4Vy91HEnbNnEpSSaVatI+TOcasruGo4pdq9sdj8LVPZ8WbDkfxU1fgf8AdlMAqlwW f7/4SyDuPtZzz7myNFIHWmfha3tGBOFS6mDjLiboXrP0cYcrA27BH/AqZyGLZatnKjjjc99k5tO klY41M4eLzNWBegCW2wgn7iDBesS3CttcwYNipX/m+9AxIOjOGV/HftdBdiQBmannclipmDvTQG tuG7oobdoCwYb5UuHGw2l5oOHJT1I0Udt0diqcc5rOA98Lef1exB7i0mR6aGEKo4D0joJpIoydM lEjRcid9fBQSbWi4PMsNjEULX/uuMIFAPLUElJzAvpLE+mvX8g== X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--0.482200-8.000000 X-TMASE-Version: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-SNTS-SMTP: 449FE31E0D714008FC2534D99ACA70D873FDFA9471BBBD59F946CA86430E3BD92000:8 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240821_012917_528647_A94B5302 X-CRM114-Status: GOOD ( 22.92 ) X-BeenThere: linux-mediatek@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-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org In order to avoid handling glitch signal when MTCMOS on/off, SMI need clamp and reset operation. Parse power reset settings for LARBs which need to reset. Register genpd callback for SMI LARBs and apply reset operations in the callback. Signed-off-by: friday.yang --- drivers/memory/mtk-smi.c | 148 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 146 insertions(+), 2 deletions(-) diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c index fbe52ecc0eca..1ccd62a17b1d 100644 --- a/drivers/memory/mtk-smi.c +++ b/drivers/memory/mtk-smi.c @@ -10,11 +10,16 @@ #include #include #include +#include #include #include #include #include +#include #include +#include +#include +#include #include #include #include @@ -36,6 +41,13 @@ #define SMI_DCM 0x300 #define SMI_DUMMY 0x444 +#define SMI_COMMON_CLAMP_EN 0x3c0 +#define SMI_COMMON_CLAMP_EN_SET 0x3c4 +#define SMI_COMMON_CLAMP_EN_CLR 0x3c8 +#define SMI_COMMON_CLAMP_MASK(inport) BIT(inport) + +#define SMI_SUB_COMM_INPORT_NR (8) + /* SMI LARB */ #define SMI_LARB_SLP_CON 0xc #define SLP_PROT_EN BIT(0) @@ -150,6 +162,7 @@ struct mtk_smi { }; struct mtk_smi_larb { /* larb: local arbiter */ + struct device *dev; struct mtk_smi smi; void __iomem *base; struct device *smi_common_dev; /* common or sub-common dev */ @@ -157,6 +170,10 @@ struct mtk_smi_larb { /* larb: local arbiter */ int larbid; u32 *mmu; unsigned char *bank; + struct regmap *sub_comm_syscon; + int sub_comm_inport; + struct notifier_block nb; + struct reset_control *rst_con; }; static int @@ -472,6 +489,60 @@ static void mtk_smi_larb_sleep_ctrl_disable(struct mtk_smi_larb *larb) writel_relaxed(0, larb->base + SMI_LARB_SLP_CON); } +static int mtk_smi_larb_clamp_protect_enable(struct device *dev) +{ + struct mtk_smi_larb *larb = dev_get_drvdata(dev); + int ret; + + /* sub_comm_syscon could be NULL if larb directly linked to SMI common */ + if (!larb->sub_comm_syscon) + return -EINVAL; + + ret = regmap_write(larb->sub_comm_syscon, SMI_COMMON_CLAMP_EN_SET, + SMI_COMMON_CLAMP_MASK(larb->sub_comm_inport)); + if (ret) + dev_err(dev, "Unable to enable clamp, inport %d, ret %d\n", + larb->sub_comm_inport, ret); + + return ret; +} + +static int mtk_smi_larb_clamp_protect_disble(struct device *dev) +{ + struct mtk_smi_larb *larb = dev_get_drvdata(dev); + int ret; + + /* sub_comm_syscon could be NULL if larb directly linked to SMI common */ + if (!larb->sub_comm_syscon) + return -EINVAL; + + ret = regmap_write(larb->sub_comm_syscon, SMI_COMMON_CLAMP_EN_CLR, + SMI_COMMON_CLAMP_MASK(larb->sub_comm_inport)); + if (ret) + dev_err(dev, "Unable to disable clamp, inport %d, ret %d\n", + larb->sub_comm_inport, ret); + + return ret; +} + +static int mtk_smi_genpd_callback(struct notifier_block *nb, + unsigned long flags, void *data) +{ + struct mtk_smi_larb *larb = container_of(nb, struct mtk_smi_larb, nb); + struct device *dev = larb->dev; + + if (flags == GENPD_NOTIFY_PRE_ON || flags == GENPD_NOTIFY_PRE_OFF) { + /* disable related SMI sub-common port */ + mtk_smi_larb_clamp_protect_enable(dev); + } else if (flags == GENPD_NOTIFY_ON) { + /* enable related SMI sub-common port */ + reset_control_reset(larb->rst_con); + mtk_smi_larb_clamp_protect_disble(dev); + } + + return NOTIFY_OK; +} + static int mtk_smi_device_link_common(struct device *dev, struct device **com_dev) { struct platform_device *smi_com_pdev; @@ -528,6 +599,59 @@ static int mtk_smi_dts_clk_init(struct device *dev, struct mtk_smi *smi, return ret; } +static int mtk_smi_larb_parse_clamp_info(struct mtk_smi_larb *larb) +{ + struct device *dev = larb->dev; + struct device_node *smi_node; + int ret; + + /* smi_node could be NULL if larb directly linked to SMI common */ + smi_node = of_parse_phandle(dev->of_node, "mediatek,smi-sub-comm", 0); + if (!smi_node) + return 0; + + larb->sub_comm_syscon = device_node_to_regmap(smi_node); + of_node_put(smi_node); + ret = of_property_read_u32(dev->of_node, + "mediatek,smi-sub-comm-in-portid", + &larb->sub_comm_inport); + + if (IS_ERR(larb->sub_comm_syscon) || ret || + larb->sub_comm_inport >= SMI_SUB_COMM_INPORT_NR) { + larb->sub_comm_syscon = NULL; + return -EINVAL; + } + + return 0; +} + +static int mtk_smi_larb_parse_reset_info(struct mtk_smi_larb *larb) +{ + struct device_node *reset_node; + struct device *dev = larb->dev; + int ret; + + /* only larb with "resets" need to get reset setting */ + reset_node = of_parse_phandle(dev->of_node, "resets", 0); + if (!reset_node) + return 0; + of_node_put(reset_node); + + larb->rst_con = devm_reset_control_get(dev, "larb_rst"); + if (IS_ERR(larb->rst_con)) + return dev_err_probe(dev, PTR_ERR(larb->rst_con), + "cannot get larb reset controller\n"); + + larb->nb.notifier_call = mtk_smi_genpd_callback; + ret = dev_pm_genpd_add_notifier(dev, &larb->nb); + if (ret) { + dev_err(dev, "Failed to add genpd callback %d\n", ret); + return -EINVAL; + } + + return 0; +} + static int mtk_smi_larb_probe(struct platform_device *pdev) { struct mtk_smi_larb *larb; @@ -538,6 +662,7 @@ static int mtk_smi_larb_probe(struct platform_device *pdev) if (!larb) return -ENOMEM; + larb->dev = dev; larb->larb_gen = of_device_get_match_data(dev); larb->base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(larb->base)) @@ -554,15 +679,29 @@ static int mtk_smi_larb_probe(struct platform_device *pdev) if (ret < 0) return ret; - pm_runtime_enable(dev); + /* find sub common to clamp larb for ISP software reset */ + ret = mtk_smi_larb_parse_clamp_info(larb); + if (ret) { + dev_err(dev, "Failed to get clamp setting for larb\n"); + goto err_pm_disable; + } + + ret = mtk_smi_larb_parse_reset_info(larb); + if (ret) { + dev_err(dev, "Failed to get power setting for larb\n"); + goto err_pm_disable; + } + platform_set_drvdata(pdev, larb); ret = component_add(dev, &mtk_smi_larb_component_ops); if (ret) goto err_pm_disable; + + pm_runtime_enable(dev); + return 0; err_pm_disable: - pm_runtime_disable(dev); device_link_remove(dev, larb->smi_common_dev); return ret; } @@ -686,6 +825,10 @@ static const struct mtk_smi_common_plat mtk_smi_common_mt8188_vpp = { .init = mtk_smi_common_mt8195_init, }; +static const struct mtk_smi_common_plat mtk_smi_sub_common_mt8188 = { + .type = MTK_SMI_GEN2_SUB_COMM, +}; + static const struct mtk_smi_common_plat mtk_smi_common_mt8192 = { .type = MTK_SMI_GEN2, .has_gals = true, @@ -729,6 +872,7 @@ static const struct of_device_id mtk_smi_common_of_ids[] = { {.compatible = "mediatek,mt8186-smi-common", .data = &mtk_smi_common_mt8186}, {.compatible = "mediatek,mt8188-smi-common-vdo", .data = &mtk_smi_common_mt8188_vdo}, {.compatible = "mediatek,mt8188-smi-common-vpp", .data = &mtk_smi_common_mt8188_vpp}, + {.compatible = "mediatek,mt8188-smi-sub-common", .data = &mtk_smi_sub_common_mt8188}, {.compatible = "mediatek,mt8192-smi-common", .data = &mtk_smi_common_mt8192}, {.compatible = "mediatek,mt8195-smi-common-vdo", .data = &mtk_smi_common_mt8195_vdo}, {.compatible = "mediatek,mt8195-smi-common-vpp", .data = &mtk_smi_common_mt8195_vpp},