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Wed, 14 Feb 2024 13:14:02 -0800 (PST) From: Abel Vesa Date: Wed, 14 Feb 2024 23:13:47 +0200 Subject: [PATCH RFC v3 2/4] spmi: pmic-arb: Make the APID init a version operation Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240214-spmi-multi-master-support-v3-2-0bae0ef04faf@linaro.org> References: <20240214-spmi-multi-master-support-v3-0-0bae0ef04faf@linaro.org> In-Reply-To: <20240214-spmi-multi-master-support-v3-0-0bae0ef04faf@linaro.org> To: Stephen Boyd , Matthias Brugger , Bjorn Andersson , Konrad Dybcio , Dmitry Baryshkov , Neil Armstrong , AngeloGioacchino Del Regno Cc: Srini Kandagatla , Johan Hovold , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-mediatek@lists.infradead.org, Abel Vesa X-Mailer: b4 0.12.4 X-Developer-Signature: v=1; a=openpgp-sha256; l=10835; i=abel.vesa@linaro.org; h=from:subject:message-id; bh=bKFYboLxMzFRb04X+ozb/WPJtei7l0yJHbarbvFO084=; b=owEBbQKS/ZANAwAKARtfRMkAlRVWAcsmYgBlzS0TsUbt+BWFJlchTfXaM18f41dpucg2xQf7B vdbv4pW4ryJAjMEAAEKAB0WIQRO8+4RTnqPKsqn0bgbX0TJAJUVVgUCZc0tEwAKCRAbX0TJAJUV VmSSD/99hucTi1nIhlstOOR1/4S0kT6k6bezP8nSgsgcnc+Ow+7Dz32rigq1K7q+1cL0JXjYbDX ERUWxiiWQYV+AVBSNuyd26mWEqTy5JYjqo9X4/OudJqhMkTscGMbmcnxylPn/7CbPoGhPUkrqoh Kh6yEPDN2DcXRd37sbCxS8VZ7qep7kjKAmDnQtWRcdDMiqF5Hh8uuWbSqPhRbF9XymzgpIgiXsq BTIbCfNHzqTd6xHTCBQmKVIMzhQ92DBxjdw9MY5LLNaIuSq7dCAoWHOR/O9JXabiLCocjzpGYKf fvQZt+KrL343AnXN4zmDlUzJxNsKlhMok+4fBkV5GVBgLFtuGgSYxOqYwad9KLSEjjOwrvnYijj 3Fir2AodT03rIVwMsW53nsGX5PnspmK2zjw/QpEpBFnIU3RT77AJhTYrEdXls5OQVfB9yMNZUdW 5vCkk/h8JAXwB6zWqBOt2lwWUsOTQBjR+t/jcxZqXM1NKa196v2XeFzLxhVf6DOJDJxTIjVNloh /KQ1QKphc2W1Fsv4DKhuktJ5MtT0hlCRUlbDSWkV5TCkJ32ykuVSdHPY+5PVHYb/0awGjrtQgs7 vmZPxj2eQdEIW2NKF/axZgIEWTmI0SnnsprTfGl0KpFsQ61pXaLN4PFxt+BnHOEptiHvhPexqgh O6ETGVyMR7chqDQ== X-Developer-Key: i=abel.vesa@linaro.org; a=openpgp; fpr=6AFF162D57F4223A8770EF5AF7BF214136F41FAE Rather than using conditionals in probe function, add the APID init as a version specific operation. Due to v7, which supports multiple buses, pass on the bus index to be used for sorting out the apid base and count. Signed-off-by: Abel Vesa --- drivers/spmi/spmi-pmic-arb.c | 199 +++++++++++++++++++++++++++---------------- 1 file changed, 124 insertions(+), 75 deletions(-) diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c index 9ed1180fe31f..23939c0d225f 100644 --- a/drivers/spmi/spmi-pmic-arb.c +++ b/drivers/spmi/spmi-pmic-arb.c @@ -183,6 +183,7 @@ struct spmi_pmic_arb { * struct pmic_arb_ver_ops - version dependent functionality. * * @ver_str: version string. + * @init_apid: finds the apid base and count * @ppid_to_apid: finds the apid for a given ppid. * @non_data_cmd: on v1 issues an spmi non-data command. * on v2 no HW support, returns -EOPNOTSUPP. @@ -202,6 +203,7 @@ struct spmi_pmic_arb { */ struct pmic_arb_ver_ops { const char *ver_str; + int (*init_apid)(struct spmi_pmic_arb *pmic_arb, int index); int (*ppid_to_apid)(struct spmi_pmic_arb *pmic_arb, u16 ppid); /* spmi commands (read_cmd, write_cmd, cmd) functionality */ int (*offset)(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr, @@ -942,6 +944,38 @@ static int qpnpint_irq_domain_alloc(struct irq_domain *domain, return 0; } +static int pmic_arb_init_apid_min_max(struct spmi_pmic_arb *pmic_arb) +{ + /* + * Initialize max_apid/min_apid to the opposite bounds, during + * the irq domain translation, we are sure to update these + */ + pmic_arb->max_apid = 0; + pmic_arb->min_apid = pmic_arb->max_periphs - 1; + + return 0; +} + +static int pmic_arb_init_apid_v1(struct spmi_pmic_arb *pmic_arb, int index) +{ + u32 *mapping_table; + + if (index) { + dev_err(&pmic_arb->spmic->dev, "Unsupported buses count %d detected\n", + index); + return -EINVAL; + } + + mapping_table = devm_kcalloc(&pmic_arb->spmic->dev, pmic_arb->max_periphs, + sizeof(*mapping_table), GFP_KERNEL); + if (!mapping_table) + return -ENOMEM; + + pmic_arb->mapping_table = mapping_table; + + return pmic_arb_init_apid_min_max(pmic_arb); +} + static int pmic_arb_ppid_to_apid_v1(struct spmi_pmic_arb *pmic_arb, u16 ppid) { u32 *mapping_table = pmic_arb->mapping_table; @@ -1144,6 +1178,40 @@ static int pmic_arb_offset_v2(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr, return 0x1000 * pmic_arb->ee + 0x8000 * apid; } +static int pmic_arb_init_apid_v5(struct spmi_pmic_arb *pmic_arb, int index) +{ + int ret; + + if (index) { + dev_err(&pmic_arb->spmic->dev, "Unsupported buses count %d detected\n", + index); + return -EINVAL; + } + + pmic_arb->base_apid = 0; + pmic_arb->apid_count = readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURES) & + PMIC_ARB_FEATURES_PERIPH_MASK; + + if (pmic_arb->base_apid + pmic_arb->apid_count > pmic_arb->max_periphs) { + dev_err(&pmic_arb->spmic->dev, "Unsupported APID count %d detected\n", + pmic_arb->base_apid + pmic_arb->apid_count); + return -EINVAL; + } + + ret = pmic_arb_init_apid_min_max(pmic_arb); + if (ret) + return ret; + + ret = pmic_arb_read_apid_map_v5(pmic_arb); + if (ret) { + dev_err(&pmic_arb->spmic->dev, "could not read APID->PPID mapping table, rc= %d\n", + ret); + return ret; + } + + return 0; +} + /* * v5 offset per ee and per apid for observer channels and per apid for * read/write channels. @@ -1178,6 +1246,49 @@ static int pmic_arb_offset_v5(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr, return offset; } +/* + * Only v7 supports 2 bus buses. Each bus will get a different apid count, + * read from different registers. + */ +static int pmic_arb_init_apid_v7(struct spmi_pmic_arb *pmic_arb, int index) +{ + int ret; + + if (index == 0) { + pmic_arb->base_apid = 0; + pmic_arb->apid_count = readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURES) & + PMIC_ARB_FEATURES_PERIPH_MASK; + } else if (index == 1) { + pmic_arb->base_apid = readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURES) & + PMIC_ARB_FEATURES_PERIPH_MASK; + pmic_arb->apid_count = readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURES1) & + PMIC_ARB_FEATURES_PERIPH_MASK; + } else { + dev_err(&pmic_arb->spmic->dev, "Unsupported buses count %d detected\n", + index); + return -EINVAL; + } + + if (pmic_arb->base_apid + pmic_arb->apid_count > pmic_arb->max_periphs) { + dev_err(&pmic_arb->spmic->dev, "Unsupported APID count %d detected\n", + pmic_arb->base_apid + pmic_arb->apid_count); + return -EINVAL; + } + + ret = pmic_arb_init_apid_min_max(pmic_arb); + if (ret) + return ret; + + ret = pmic_arb_read_apid_map_v5(pmic_arb); + if (ret) { + dev_err(&pmic_arb->spmic->dev, "could not read APID->PPID mapping table, rc= %d\n", + ret); + return ret; + } + + return 0; +} + /* * v7 offset per ee and per apid for observer channels and per apid for * read/write channels. @@ -1358,6 +1469,7 @@ pmic_arb_apid_owner_v7(struct spmi_pmic_arb *pmic_arb, u16 n) static const struct pmic_arb_ver_ops pmic_arb_v1 = { .ver_str = "v1", + .init_apid = pmic_arb_init_apid_v1, .ppid_to_apid = pmic_arb_ppid_to_apid_v1, .non_data_cmd = pmic_arb_non_data_cmd_v1, .offset = pmic_arb_offset_v1, @@ -1372,6 +1484,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v1 = { static const struct pmic_arb_ver_ops pmic_arb_v2 = { .ver_str = "v2", + .init_apid = pmic_arb_init_apid_v1, .ppid_to_apid = pmic_arb_ppid_to_apid_v2, .non_data_cmd = pmic_arb_non_data_cmd_v2, .offset = pmic_arb_offset_v2, @@ -1386,6 +1499,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v2 = { static const struct pmic_arb_ver_ops pmic_arb_v3 = { .ver_str = "v3", + .init_apid = pmic_arb_init_apid_v1, .ppid_to_apid = pmic_arb_ppid_to_apid_v2, .non_data_cmd = pmic_arb_non_data_cmd_v2, .offset = pmic_arb_offset_v2, @@ -1400,6 +1514,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v3 = { static const struct pmic_arb_ver_ops pmic_arb_v5 = { .ver_str = "v5", + .init_apid = pmic_arb_init_apid_v5, .ppid_to_apid = pmic_arb_ppid_to_apid_v5, .non_data_cmd = pmic_arb_non_data_cmd_v2, .offset = pmic_arb_offset_v5, @@ -1414,6 +1529,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v5 = { static const struct pmic_arb_ver_ops pmic_arb_v7 = { .ver_str = "v7", + .init_apid = pmic_arb_init_apid_v7, .ppid_to_apid = pmic_arb_ppid_to_apid_v5, .non_data_cmd = pmic_arb_non_data_cmd_v2, .offset = pmic_arb_offset_v7, @@ -1439,7 +1555,6 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev) struct spmi_controller *ctrl; struct resource *res; void __iomem *core; - u32 *mapping_table; u32 channel, ee, hw_ver; int err; @@ -1467,12 +1582,6 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev) pmic_arb->core_size = resource_size(res); - pmic_arb->ppid_to_apid = devm_kcalloc(&ctrl->dev, PMIC_ARB_MAX_PPID, - sizeof(*pmic_arb->ppid_to_apid), - GFP_KERNEL); - if (!pmic_arb->ppid_to_apid) - return -ENOMEM; - hw_ver = readl_relaxed(core + PMIC_ARB_VERSION); if (hw_ver < PMIC_ARB_VERSION_V2_MIN) { @@ -1506,58 +1615,17 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev) return PTR_ERR(pmic_arb->wr_base); } - pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS; + dev_info(&ctrl->dev, "PMIC arbiter version %s (0x%x)\n", + pmic_arb->ver_ops->ver_str, hw_ver); - if (hw_ver >= PMIC_ARB_VERSION_V7_MIN) { + if (hw_ver < PMIC_ARB_VERSION_V7_MIN) + pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS; + else pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS_V7; - /* Optional property for v7: */ - of_property_read_u32(pdev->dev.of_node, "qcom,bus-id", - &pmic_arb->bus_instance); - if (pmic_arb->bus_instance > 1) { - dev_err(&pdev->dev, "invalid bus instance (%u) specified\n", - pmic_arb->bus_instance); - return -EINVAL; - } - - if (pmic_arb->bus_instance == 0) { - pmic_arb->base_apid = 0; - pmic_arb->apid_count = - readl_relaxed(core + PMIC_ARB_FEATURES) & - PMIC_ARB_FEATURES_PERIPH_MASK; - } else { - pmic_arb->base_apid = - readl_relaxed(core + PMIC_ARB_FEATURES) & - PMIC_ARB_FEATURES_PERIPH_MASK; - pmic_arb->apid_count = - readl_relaxed(core + PMIC_ARB_FEATURES1) & - PMIC_ARB_FEATURES_PERIPH_MASK; - } - if (pmic_arb->base_apid + pmic_arb->apid_count > pmic_arb->max_periphs) { - dev_err(&pdev->dev, "Unsupported APID count %d detected\n", - pmic_arb->base_apid + pmic_arb->apid_count); - return -EINVAL; - } - } else if (hw_ver >= PMIC_ARB_VERSION_V5_MIN) { - pmic_arb->base_apid = 0; - pmic_arb->apid_count = readl_relaxed(core + PMIC_ARB_FEATURES) & - PMIC_ARB_FEATURES_PERIPH_MASK; - - if (pmic_arb->apid_count > pmic_arb->max_periphs) { - dev_err(&pdev->dev, "Unsupported APID count %d detected\n", - pmic_arb->apid_count); - return -EINVAL; - } - } - - pmic_arb->apid_data = devm_kcalloc(&ctrl->dev, pmic_arb->max_periphs, - sizeof(*pmic_arb->apid_data), - GFP_KERNEL); - if (!pmic_arb->apid_data) - return -ENOMEM; - - dev_info(&ctrl->dev, "PMIC arbiter version %s (0x%x)\n", - pmic_arb->ver_ops->ver_str, hw_ver); + err = pmic_arb->ver_ops->init_apid(pmic_arb, 0); + if (err) + return err; res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "intr"); pmic_arb->intr = devm_ioremap_resource(&ctrl->dev, res); @@ -1599,16 +1667,6 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev) } pmic_arb->ee = ee; - mapping_table = devm_kcalloc(&ctrl->dev, pmic_arb->max_periphs, - sizeof(*mapping_table), GFP_KERNEL); - if (!mapping_table) - return -ENOMEM; - - pmic_arb->mapping_table = mapping_table; - /* Initialize max_apid/min_apid to the opposite bounds, during - * the irq domain translation, we are sure to update these */ - pmic_arb->max_apid = 0; - pmic_arb->min_apid = pmic_arb->max_periphs - 1; platform_set_drvdata(pdev, ctrl); raw_spin_lock_init(&pmic_arb->lock); @@ -1617,15 +1675,6 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev) ctrl->read_cmd = pmic_arb_read_cmd; ctrl->write_cmd = pmic_arb_write_cmd; - if (hw_ver >= PMIC_ARB_VERSION_V5_MIN) { - err = pmic_arb_read_apid_map_v5(pmic_arb); - if (err) { - dev_err(&pdev->dev, "could not read APID->PPID mapping table, rc= %d\n", - err); - return err; - } - } - dev_dbg(&pdev->dev, "adding irq domain\n"); pmic_arb->domain = irq_domain_add_tree(pdev->dev.of_node, &pmic_arb_irq_domain_ops, pmic_arb);