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Fri, 19 Feb 2021 09:26:17 -0500 (EST) From: Andrew Jeffery To: openipmi-developer@lists.sourceforge.net, openbmc@lists.ozlabs.org, minyard@acm.org Subject: [PATCH 06/19] ipmi: kcs_bmc_aspeed: Use of match data to extract KCS properties Date: Sat, 20 Feb 2021 00:55:10 +1030 Message-Id: <20210219142523.3464540-7-andrew@aj.id.au> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210219142523.3464540-1-andrew@aj.id.au> References: <20210219142523.3464540-1-andrew@aj.id.au> MIME-Version: 1.0 X-BeenThere: openbmc@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Development list for OpenBMC List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, tmaimon77@gmail.com, linux-aspeed@lists.ozlabs.org, linux-gpio@vger.kernel.org, avifishman70@gmail.com, venture@google.com, linus.walleij@linaro.org, linux-kernel@vger.kernel.org, tali.perry1@gmail.com, robh+dt@kernel.org, lee.jones@linaro.org, chiawei_wang@aspeedtech.com, linux-arm-kernel@lists.infradead.org, benjaminfair@google.com Errors-To: openbmc-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "openbmc" Unpack and remove the aspeed_kcs_probe_of_v[12]() functions to aid rearranging how the private device-driver memory is allocated. Signed-off-by: Andrew Jeffery --- drivers/char/ipmi/kcs_bmc_aspeed.c | 146 ++++++++++++++--------------- 1 file changed, 68 insertions(+), 78 deletions(-) diff --git a/drivers/char/ipmi/kcs_bmc_aspeed.c b/drivers/char/ipmi/kcs_bmc_aspeed.c index eefe362f65f0..061f53676206 100644 --- a/drivers/char/ipmi/kcs_bmc_aspeed.c +++ b/drivers/char/ipmi/kcs_bmc_aspeed.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include #include @@ -63,6 +64,10 @@ struct aspeed_kcs_bmc { struct regmap *map; }; +struct aspeed_kcs_of_ops { + int (*get_channel)(struct platform_device *pdev); + int (*get_io_address)(struct platform_device *pdev); +}; static u8 aspeed_kcs_inb(struct kcs_bmc *kcs_bmc, u32 reg) { @@ -231,13 +236,10 @@ static const struct kcs_ioreg ast_kcs_bmc_ioregs[KCS_CHANNEL_MAX] = { { .idr = LPC_IDR4, .odr = LPC_ODR4, .str = LPC_STR4 }, }; -static struct kcs_bmc *aspeed_kcs_probe_of_v1(struct platform_device *pdev) +static int aspeed_kcs_of_v1_get_channel(struct platform_device *pdev) { - struct aspeed_kcs_bmc *priv; struct device_node *np; - struct kcs_bmc *kcs; u32 channel; - u32 slave; int rc; np = pdev->dev.of_node; @@ -245,105 +247,78 @@ static struct kcs_bmc *aspeed_kcs_probe_of_v1(struct platform_device *pdev) rc = of_property_read_u32(np, "kcs_chan", &channel); if ((rc != 0) || (channel == 0 || channel > KCS_CHANNEL_MAX)) { dev_err(&pdev->dev, "no valid 'kcs_chan' configured\n"); - return ERR_PTR(-EINVAL); + return -EINVAL; } - kcs = kcs_bmc_alloc(&pdev->dev, sizeof(struct aspeed_kcs_bmc), channel); - if (!kcs) - return ERR_PTR(-ENOMEM); + return channel; +} - priv = kcs_bmc_priv(kcs); - priv->map = syscon_node_to_regmap(pdev->dev.parent->of_node); - if (IS_ERR(priv->map)) { - dev_err(&pdev->dev, "Couldn't get regmap\n"); - return ERR_PTR(-ENODEV); - } +static int aspeed_kcs_of_v1_get_io_address(struct platform_device *pdev) +{ + u32 slave; + int rc; - rc = of_property_read_u32(np, "kcs_addr", &slave); - if (rc) { + rc = of_property_read_u32(pdev->dev.of_node, "kcs_addr", &slave); + if (rc || slave > 0xffff) { dev_err(&pdev->dev, "no valid 'kcs_addr' configured\n"); - return ERR_PTR(-EINVAL); + return -EINVAL; } - kcs->ioreg = ast_kcs_bmc_ioregs[channel - 1]; - aspeed_kcs_set_address(kcs, slave); - - return kcs; -} - -static int aspeed_kcs_calculate_channel(const struct kcs_ioreg *regs) -{ - int i; - - for (i = 0; i < ARRAY_SIZE(ast_kcs_bmc_ioregs); i++) { - if (!memcmp(&ast_kcs_bmc_ioregs[i], regs, sizeof(*regs))) - return i + 1; - } - - return -EINVAL; + return slave; } -static struct kcs_bmc *aspeed_kcs_probe_of_v2(struct platform_device *pdev) +static int aspeed_kcs_of_v2_get_channel(struct platform_device *pdev) { - struct aspeed_kcs_bmc *priv; struct device_node *np; struct kcs_ioreg ioreg; - struct kcs_bmc *kcs; const __be32 *reg; - int channel; - u32 slave; - int rc; + int i; np = pdev->dev.of_node; /* Don't translate addresses, we want offsets for the regmaps */ reg = of_get_address(np, 0, NULL, NULL); if (!reg) - return ERR_PTR(-EINVAL); + return -EINVAL; ioreg.idr = be32_to_cpup(reg); reg = of_get_address(np, 1, NULL, NULL); if (!reg) - return ERR_PTR(-EINVAL); + return -EINVAL; ioreg.odr = be32_to_cpup(reg); reg = of_get_address(np, 2, NULL, NULL); if (!reg) - return ERR_PTR(-EINVAL); + return -EINVAL; ioreg.str = be32_to_cpup(reg); - channel = aspeed_kcs_calculate_channel(&ioreg); - if (channel < 0) - return ERR_PTR(channel); - - kcs = kcs_bmc_alloc(&pdev->dev, sizeof(struct aspeed_kcs_bmc), channel); - if (!kcs) - return ERR_PTR(-ENOMEM); - - kcs->ioreg = ioreg; - - priv = kcs_bmc_priv(kcs); - priv->map = syscon_node_to_regmap(pdev->dev.parent->of_node); - if (IS_ERR(priv->map)) { - dev_err(&pdev->dev, "Couldn't get regmap\n"); - return ERR_PTR(-ENODEV); + for (i = 0; i < ARRAY_SIZE(ast_kcs_bmc_ioregs); i++) { + if (!memcmp(&ast_kcs_bmc_ioregs[i], &ioreg, sizeof(ioreg))) + return i + 1; } - rc = of_property_read_u32(np, "aspeed,lpc-io-reg", &slave); - if (rc) - return ERR_PTR(rc); + return -EINVAL; +} - aspeed_kcs_set_address(kcs, slave); +static int aspeed_kcs_of_v2_get_io_address(struct platform_device *pdev) +{ + uint32_t slave; + int rc; - return kcs; + rc = of_property_read_u32(pdev->dev.of_node, "aspeed,lpc-io-reg", &slave); + if (rc || slave > 0xffff) + return -EINVAL; + + return slave; } static int aspeed_kcs_probe(struct platform_device *pdev) { + const struct aspeed_kcs_of_ops *ops; struct device *dev = &pdev->dev; struct kcs_bmc *kcs_bmc; struct device_node *np; - int rc; + int rc, channel, addr; np = dev->of_node->parent; if (!of_device_is_compatible(np, "aspeed,ast2400-lpc-v2") && @@ -352,23 +327,28 @@ static int aspeed_kcs_probe(struct platform_device *pdev) dev_err(dev, "unsupported LPC device binding\n"); return -ENODEV; } - - np = dev->of_node; - if (of_device_is_compatible(np, "aspeed,ast2400-kcs-bmc") || - of_device_is_compatible(np, "aspeed,ast2500-kcs-bmc")) - kcs_bmc = aspeed_kcs_probe_of_v1(pdev); - else if (of_device_is_compatible(np, "aspeed,ast2400-kcs-bmc-v2") || - of_device_is_compatible(np, "aspeed,ast2500-kcs-bmc-v2")) - kcs_bmc = aspeed_kcs_probe_of_v2(pdev); - else + ops = of_device_get_match_data(&pdev->dev); + if (!ops) return -EINVAL; - if (IS_ERR(kcs_bmc)) - return PTR_ERR(kcs_bmc); + channel = ops->get_channel(pdev); + if (channel < 0) + return channel; + kcs_bmc = kcs_bmc_alloc(&pdev->dev, sizeof(struct aspeed_kcs_bmc), channel); + if (!kcs_bmc) + return -ENOMEM; + + kcs_bmc->ioreg = ast_kcs_bmc_ioregs[channel - 1]; kcs_bmc->io_inputb = aspeed_kcs_inb; kcs_bmc->io_outputb = aspeed_kcs_outb; + addr = ops->get_io_address(pdev); + if (addr < 0) + return addr; + + aspeed_kcs_set_address(kcs_bmc, addr); + rc = aspeed_kcs_config_irq(kcs_bmc, pdev); if (rc) return rc; @@ -400,11 +380,21 @@ static int aspeed_kcs_remove(struct platform_device *pdev) return 0; } +static const struct aspeed_kcs_of_ops of_v1_ops = { + .get_channel = aspeed_kcs_of_v1_get_channel, + .get_io_address = aspeed_kcs_of_v1_get_io_address, +}; + +static const struct aspeed_kcs_of_ops of_v2_ops = { + .get_channel = aspeed_kcs_of_v2_get_channel, + .get_io_address = aspeed_kcs_of_v2_get_io_address, +}; + static const struct of_device_id ast_kcs_bmc_match[] = { - { .compatible = "aspeed,ast2400-kcs-bmc" }, - { .compatible = "aspeed,ast2500-kcs-bmc" }, - { .compatible = "aspeed,ast2400-kcs-bmc-v2" }, - { .compatible = "aspeed,ast2500-kcs-bmc-v2" }, + { .compatible = "aspeed,ast2400-kcs-bmc", .data = &of_v1_ops }, + { .compatible = "aspeed,ast2500-kcs-bmc", .data = &of_v1_ops }, + { .compatible = "aspeed,ast2400-kcs-bmc-v2", .data = &of_v2_ops }, + { .compatible = "aspeed,ast2500-kcs-bmc-v2", .data = &of_v2_ops }, { } }; MODULE_DEVICE_TABLE(of, ast_kcs_bmc_match);