From: Hauke Mehrtens <hauke-5/S+JYg5SzeELgA04lAiVw@public.gmane.org> To: ralf-6z/3iImG2C8G8FEW9MqTrA@public.gmane.org Cc: linux-mips-6z/3iImG2C8G8FEW9MqTrA@public.gmane.org, linux-mtd-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-watchdog-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org, john-Pj+rj9U5foFAfugRpC6u6w@public.gmane.org, linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, hauke.mehrtens-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, andy.shevchenko-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, p.zabel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org, Hauke Mehrtens <hauke-5/S+JYg5SzeELgA04lAiVw@public.gmane.org> Subject: [PATCH v4 12/16] MIPS: lantiq: Add a GPHY driver which uses the RCU syscon-mfd Date: Tue, 20 Jun 2017 00:26:04 +0200 [thread overview] Message-ID: <20170619222608.13344-13-hauke@hauke-m.de> (raw) In-Reply-To: <20170619222608.13344-1-hauke-5/S+JYg5SzeELgA04lAiVw@public.gmane.org> From: Martin Blumenstingl <martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org> Compared to the old xrx200_phy_fw driver the new version has multiple enhancements. The name of the firmware files does not have to be added to all .dts files anymore - one now configures the GPHY mode (FE or GE) instead. Each GPHY can now also boot separate firmware (thus mixing of GE and FE GPHYs is now possible). The new implementation is based on the RCU syscon-mfd and uses the reeset_controller framework instead of raw RCU register reads/writes. Signed-off-by: Hauke Mehrtens <hauke-5/S+JYg5SzeELgA04lAiVw@public.gmane.org> --- .../devicetree/bindings/mips/lantiq/rcu-gphy.txt | 36 +++ arch/mips/lantiq/xway/sysctrl.c | 6 +- drivers/soc/lantiq/Makefile | 1 + drivers/soc/lantiq/gphy.c | 261 +++++++++++++++++++++ include/dt-bindings/mips/lantiq_rcu_gphy.h | 15 ++ 5 files changed, 317 insertions(+), 2 deletions(-) create mode 100644 Documentation/devicetree/bindings/mips/lantiq/rcu-gphy.txt create mode 100644 drivers/soc/lantiq/gphy.c create mode 100644 include/dt-bindings/mips/lantiq_rcu_gphy.h diff --git a/Documentation/devicetree/bindings/mips/lantiq/rcu-gphy.txt b/Documentation/devicetree/bindings/mips/lantiq/rcu-gphy.txt new file mode 100644 index 000000000000..ec09783da9b2 --- /dev/null +++ b/Documentation/devicetree/bindings/mips/lantiq/rcu-gphy.txt @@ -0,0 +1,36 @@ +Lantiq XWAY SoC GPHY binding +============================ + +This binding describes a software-defined ethernet PHY, provided by the RCU +module on newer Lantiq XWAY SoCs (xRX200 and newer). + +------------------------------------------------------------------------------- +Required properties: +- compatible : Should be one of + "lantiq,xrx200a1x-gphy" + "lantiq,xrx200a2x-gphy" + "lantiq,xrx300-gphy" + "lantiq,xrx330-gphy" +- reg : Addrress of the GPHY FW load address register +- resets : Must reference the RCU GPHY reset bit +- reset-names : One entry, value must be "gphy" or optional "gphy2" +- clocks : A reference to the (PMU) GPHY clock gate + +Optional properties: +- lantiq,gphy-mode : GPHY_MODE_GE (default) or GPHY_MODE_FE as defined in + <dt-bindings/mips/lantiq_xway_gphy.h> + + +------------------------------------------------------------------------------- +Example for the GPHys on the xRX200 SoCs: + +#include <dt-bindings/mips/lantiq_rcu_gphy.h> + gphy0: gphy@0 { + compatible = "lantiq,xrx200a2x-gphy"; + reg = <0x20 0x4> + + resets = <&reset0 31 30>, <&reset1 7 7>; + reset-names = "gphy", "gphy2"; + clocks = <&pmu0 XRX200_PMU_GATE_GPHY>; + lantiq,gphy-mode = <GPHY_MODE_GE> + }; diff --git a/arch/mips/lantiq/xway/sysctrl.c b/arch/mips/lantiq/xway/sysctrl.c index 706639a343bc..87eab4d288e5 100644 --- a/arch/mips/lantiq/xway/sysctrl.c +++ b/arch/mips/lantiq/xway/sysctrl.c @@ -518,7 +518,8 @@ void __init ltq_soc_init(void) clkdev_add_pmu("1e108000.eth", NULL, 0, 0, PMU_SWITCH | PMU_PPE_DP | PMU_PPE_TC); clkdev_add_pmu("1da00000.usif", "NULL", 1, 0, PMU_USIF); - clkdev_add_pmu("1f203000.rcu", "gphy", 1, 0, PMU_GPHY); + clkdev_add_pmu("1f203020.gphy", NULL, 1, 0, PMU_GPHY); + clkdev_add_pmu("1f203068.gphy", NULL, 1, 0, PMU_GPHY); clkdev_add_pmu("1e103100.deu", NULL, 1, 0, PMU_DEU); clkdev_add_pmu("1e116000.mei", "afe", 1, 2, PMU_ANALOG_DSL_AFE); clkdev_add_pmu("1e116000.mei", "dfe", 1, 0, PMU_DFE); @@ -541,7 +542,8 @@ void __init ltq_soc_init(void) PMU_SWITCH | PMU_PPE_DPLUS | PMU_PPE_DPLUM | PMU_PPE_EMA | PMU_PPE_TC | PMU_PPE_SLL01 | PMU_PPE_QSB | PMU_PPE_TOP); - clkdev_add_pmu("1f203000.rcu", "gphy", 0, 0, PMU_GPHY); + clkdev_add_pmu("1f203020.gphy", NULL, 0, 0, PMU_GPHY); + clkdev_add_pmu("1f203068.gphy", NULL, 0, 0, PMU_GPHY); clkdev_add_pmu("1e103000.sdio", NULL, 1, 0, PMU_SDIO); clkdev_add_pmu("1e103100.deu", NULL, 1, 0, PMU_DEU); clkdev_add_pmu("1e116000.mei", "dfe", 1, 0, PMU_DFE); diff --git a/drivers/soc/lantiq/Makefile b/drivers/soc/lantiq/Makefile index 35aa86bd1023..be9e866d53e5 100644 --- a/drivers/soc/lantiq/Makefile +++ b/drivers/soc/lantiq/Makefile @@ -1 +1,2 @@ obj-y += fpi-bus.o +obj-$(CONFIG_XRX200_PHY_FW) += gphy.o diff --git a/drivers/soc/lantiq/gphy.c b/drivers/soc/lantiq/gphy.c new file mode 100644 index 000000000000..4c84447b0a84 --- /dev/null +++ b/drivers/soc/lantiq/gphy.c @@ -0,0 +1,261 @@ +/* + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + * Copyright (C) 2012 John Crispin <blogic-Pj+rj9U5foFAfugRpC6u6w@public.gmane.org> + * Copyright (C) 2016 Martin Blumenstingl <martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org> + * Copyright (C) 2017 Hauke Mehrtens <hauke-5/S+JYg5SzeELgA04lAiVw@public.gmane.org> + */ + +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/dma-mapping.h> +#include <linux/firmware.h> +#include <linux/mfd/syscon.h> +#include <linux/module.h> +#include <linux/reboot.h> +#include <linux/regmap.h> +#include <linux/reset.h> +#include <linux/of_device.h> +#include <linux/of_platform.h> +#include <linux/property.h> +#include <dt-bindings/mips/lantiq_rcu_gphy.h> + +#include <lantiq_soc.h> + +#define XRX200_GPHY_FW_ALIGN (16 * 1024) + +struct xway_gphy_priv { + struct clk *gphy_clk_gate; + struct reset_control *gphy_reset; + struct reset_control *gphy_reset2; + struct notifier_block gphy_reboot_nb; + void __iomem *membase; + char *fw_name; + dma_addr_t dma_addr; + void *fw_addr; + size_t size; +}; + +struct xway_gphy_match_data { + char *fe_firmware_name; + char *ge_firmware_name; +}; + +static const struct xway_gphy_match_data xrx200a1x_gphy_data = { + .fe_firmware_name = "lantiq/xrx200_phy22f_a14.bin", + .ge_firmware_name = "lantiq/xrx200_phy11g_a14.bin", +}; + +static const struct xway_gphy_match_data xrx200a2x_gphy_data = { + .fe_firmware_name = "lantiq/xrx200_phy22f_a22.bin", + .ge_firmware_name = "lantiq/xrx200_phy11g_a22.bin", +}; + +static const struct xway_gphy_match_data xrx300_gphy_data = { + .fe_firmware_name = "lantiq/xrx300_phy22f_a21.bin", + .ge_firmware_name = "lantiq/xrx300_phy11g_a21.bin", +}; + +static const struct of_device_id xway_gphy_match[] = { + { .compatible = "lantiq,xrx200a1x-gphy", .data = &xrx200a1x_gphy_data }, + { .compatible = "lantiq,xrx200a2x-gphy", .data = &xrx200a2x_gphy_data }, + { .compatible = "lantiq,xrx300-gphy", .data = &xrx300_gphy_data }, + { .compatible = "lantiq,xrx330-gphy", .data = &xrx300_gphy_data }, + {}, +}; +MODULE_DEVICE_TABLE(of, xway_gphy_match); + +static struct xway_gphy_priv *to_xway_gphy_priv(struct notifier_block *nb) +{ + return container_of(nb, struct xway_gphy_priv, gphy_reboot_nb); +} + +static int xway_gphy_reboot_notify(struct notifier_block *reboot_nb, + unsigned long code, void *unused) +{ + struct xway_gphy_priv *priv = to_xway_gphy_priv(reboot_nb); + + if (priv) { + reset_control_assert(priv->gphy_reset); + reset_control_assert(priv->gphy_reset2); + } + + return NOTIFY_DONE; +} + +static int xway_gphy_load(struct device *dev, struct xway_gphy_priv *priv, + dma_addr_t *dev_addr) +{ + const struct firmware *fw; + void *fw_addr_align; + int ret; + + ret = request_firmware(&fw, priv->fw_name, dev); + if (ret) { + dev_err(dev, "failed to load firmware: %s, error: %i\n", + priv->fw_name, ret); + return ret; + } + + /* + * GPHY cores need the firmware code in a persistent and contiguous + * memory area with a 16 kB boundary aligned start address. + */ + priv->size = fw->size + XRX200_GPHY_FW_ALIGN; + + priv->fw_addr = dma_alloc_coherent(dev, priv->size, + &priv->dma_addr, GFP_KERNEL); + if (priv->fw_addr) { + fw_addr_align = PTR_ALIGN(priv->fw_addr, XRX200_GPHY_FW_ALIGN); + *dev_addr = ALIGN(priv->dma_addr, XRX200_GPHY_FW_ALIGN); + memcpy(fw_addr_align, fw->data, fw->size); + } else { + dev_err(dev, "failed to alloc firmware memory\n"); + ret = -ENOMEM; + } + + release_firmware(fw); + + return ret; +} + +static int xway_gphy_of_probe(struct platform_device *pdev, struct xway_gphy_priv *priv) +{ + struct device *dev = &pdev->dev; + const struct xway_gphy_match_data *gphy_fw_name_cfg; + u32 gphy_mode; + int ret; + struct resource *res_gphy; + + gphy_fw_name_cfg = of_device_get_match_data(dev); + + priv->gphy_clk_gate = devm_clk_get(dev, NULL); + if (IS_ERR(priv->gphy_clk_gate)) { + dev_err(dev, "Failed to lookup gate clock\n"); + return PTR_ERR(priv->gphy_clk_gate); + } + + res_gphy = platform_get_resource(pdev, IORESOURCE_MEM, 0); + priv->membase = devm_ioremap_resource(dev, res_gphy); + if (IS_ERR(priv->membase)) + return PTR_ERR(priv->membase); + + priv->gphy_reset = devm_reset_control_get(dev, "gphy"); + if (IS_ERR(priv->gphy_reset)) { + if (PTR_ERR(priv->gphy_reset) != -EPROBE_DEFER) + dev_err(dev, "Failed to lookup gphy reset\n"); + return PTR_ERR(priv->gphy_reset); + } + + priv->gphy_reset2 = devm_reset_control_get_optional(dev, "gphy2"); + if (IS_ERR(priv->gphy_reset2)) + return PTR_ERR(priv->gphy_reset2); + + ret = device_property_read_u32(dev, "lantiq,gphy-mode", &gphy_mode); + /* Default to GE mode */ + if (ret) + gphy_mode = GPHY_MODE_GE; + + switch (gphy_mode) { + case GPHY_MODE_FE: + priv->fw_name = gphy_fw_name_cfg->fe_firmware_name; + break; + case GPHY_MODE_GE: + priv->fw_name = gphy_fw_name_cfg->ge_firmware_name; + break; + default: + dev_err(dev, "Unknown GPHY mode %d\n", gphy_mode); + return -EINVAL; + } + + return 0; +} + +static int xway_gphy_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct xway_gphy_priv *priv; + dma_addr_t fw_addr = 0; + int ret; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + ret = xway_gphy_of_probe(pdev, priv); + if (ret) + return ret; + + ret = clk_prepare_enable(priv->gphy_clk_gate); + if (ret) + return ret; + + ret = xway_gphy_load(dev, priv, &fw_addr); + if (ret) + return ret; + + reset_control_assert(priv->gphy_reset); + reset_control_assert(priv->gphy_reset2); + + iowrite32be(fw_addr, priv->membase); + + reset_control_deassert(priv->gphy_reset); + reset_control_deassert(priv->gphy_reset2); + + /* assert the gphy reset because it can hang after a reboot: */ + priv->gphy_reboot_nb.notifier_call = xway_gphy_reboot_notify; + priv->gphy_reboot_nb.priority = -1; + + ret = register_reboot_notifier(&priv->gphy_reboot_nb); + if (ret) + dev_warn(dev, "Failed to register reboot notifier\n"); + + platform_set_drvdata(pdev, priv); + + return ret; +} + +static int xway_gphy_remove(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct xway_gphy_priv *priv = platform_get_drvdata(pdev); + int ret; + + reset_control_assert(priv->gphy_reset); + reset_control_assert(priv->gphy_reset2); + + iowrite32be(0, priv->membase); + + clk_disable_unprepare(priv->gphy_clk_gate); + + dma_free_coherent(dev, priv->size, priv->fw_addr, priv->dma_addr); + + ret = unregister_reboot_notifier(&priv->gphy_reboot_nb); + if (ret) + dev_warn(dev, "Failed to unregister reboot notifier\n"); + + return 0; +} + +static struct platform_driver xway_gphy_driver = { + .probe = xway_gphy_probe, + .remove = xway_gphy_remove, + .driver = { + .name = "xway-rcu-gphy", + .of_match_table = xway_gphy_match, + }, +}; + +module_platform_driver(xway_gphy_driver); + +MODULE_FIRMWARE("lantiq/xrx300_phy11g_a21.bin"); +MODULE_FIRMWARE("lantiq/xrx300_phy22f_a21.bin"); +MODULE_FIRMWARE("lantiq/xrx200_phy11g_a14.bin"); +MODULE_FIRMWARE("lantiq/xrx200_phy11g_a22.bin"); +MODULE_FIRMWARE("lantiq/xrx200_phy22f_a14.bin"); +MODULE_FIRMWARE("lantiq/xrx200_phy22f_a22.bin"); +MODULE_AUTHOR("Martin Blumenstingl <martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>"); +MODULE_DESCRIPTION("Lantiq XWAY GPHY Firmware Loader"); +MODULE_LICENSE("GPL"); diff --git a/include/dt-bindings/mips/lantiq_rcu_gphy.h b/include/dt-bindings/mips/lantiq_rcu_gphy.h new file mode 100644 index 000000000000..fa1a63773342 --- /dev/null +++ b/include/dt-bindings/mips/lantiq_rcu_gphy.h @@ -0,0 +1,15 @@ +/* + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + * Copyright (C) 2016 Martin Blumenstingl <martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org> + * Copyright (C) 2017 Hauke Mehrtens <hauke-5/S+JYg5SzeELgA04lAiVw@public.gmane.org> + */ +#ifndef _DT_BINDINGS_MIPS_LANTIQ_RCU_GPHY_H +#define _DT_BINDINGS_MIPS_LANTIQ_RCU_GPHY_H + +#define GPHY_MODE_GE 1 +#define GPHY_MODE_FE 2 + +#endif /* _DT_BINDINGS_MIPS_LANTIQ_RCU_GPHY_H */ -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe linux-spi" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html
WARNING: multiple messages have this Message-ID (diff)
From: Hauke Mehrtens <hauke@hauke-m.de> To: ralf@linux-mips.org Cc: linux-mips@linux-mips.org, linux-mtd@lists.infradead.org, linux-watchdog@vger.kernel.org, devicetree@vger.kernel.org, martin.blumenstingl@googlemail.com, john@phrozen.org, linux-spi@vger.kernel.org, hauke.mehrtens@intel.com, robh@kernel.org, andy.shevchenko@gmail.com, p.zabel@pengutronix.de, Hauke Mehrtens <hauke@hauke-m.de> Subject: [PATCH v4 12/16] MIPS: lantiq: Add a GPHY driver which uses the RCU syscon-mfd Date: Tue, 20 Jun 2017 00:26:04 +0200 [thread overview] Message-ID: <20170619222608.13344-13-hauke@hauke-m.de> (raw) In-Reply-To: <20170619222608.13344-1-hauke@hauke-m.de> From: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Compared to the old xrx200_phy_fw driver the new version has multiple enhancements. The name of the firmware files does not have to be added to all .dts files anymore - one now configures the GPHY mode (FE or GE) instead. Each GPHY can now also boot separate firmware (thus mixing of GE and FE GPHYs is now possible). The new implementation is based on the RCU syscon-mfd and uses the reeset_controller framework instead of raw RCU register reads/writes. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> --- .../devicetree/bindings/mips/lantiq/rcu-gphy.txt | 36 +++ arch/mips/lantiq/xway/sysctrl.c | 6 +- drivers/soc/lantiq/Makefile | 1 + drivers/soc/lantiq/gphy.c | 261 +++++++++++++++++++++ include/dt-bindings/mips/lantiq_rcu_gphy.h | 15 ++ 5 files changed, 317 insertions(+), 2 deletions(-) create mode 100644 Documentation/devicetree/bindings/mips/lantiq/rcu-gphy.txt create mode 100644 drivers/soc/lantiq/gphy.c create mode 100644 include/dt-bindings/mips/lantiq_rcu_gphy.h diff --git a/Documentation/devicetree/bindings/mips/lantiq/rcu-gphy.txt b/Documentation/devicetree/bindings/mips/lantiq/rcu-gphy.txt new file mode 100644 index 000000000000..ec09783da9b2 --- /dev/null +++ b/Documentation/devicetree/bindings/mips/lantiq/rcu-gphy.txt @@ -0,0 +1,36 @@ +Lantiq XWAY SoC GPHY binding +============================ + +This binding describes a software-defined ethernet PHY, provided by the RCU +module on newer Lantiq XWAY SoCs (xRX200 and newer). + +------------------------------------------------------------------------------- +Required properties: +- compatible : Should be one of + "lantiq,xrx200a1x-gphy" + "lantiq,xrx200a2x-gphy" + "lantiq,xrx300-gphy" + "lantiq,xrx330-gphy" +- reg : Addrress of the GPHY FW load address register +- resets : Must reference the RCU GPHY reset bit +- reset-names : One entry, value must be "gphy" or optional "gphy2" +- clocks : A reference to the (PMU) GPHY clock gate + +Optional properties: +- lantiq,gphy-mode : GPHY_MODE_GE (default) or GPHY_MODE_FE as defined in + <dt-bindings/mips/lantiq_xway_gphy.h> + + +------------------------------------------------------------------------------- +Example for the GPHys on the xRX200 SoCs: + +#include <dt-bindings/mips/lantiq_rcu_gphy.h> + gphy0: gphy@0 { + compatible = "lantiq,xrx200a2x-gphy"; + reg = <0x20 0x4> + + resets = <&reset0 31 30>, <&reset1 7 7>; + reset-names = "gphy", "gphy2"; + clocks = <&pmu0 XRX200_PMU_GATE_GPHY>; + lantiq,gphy-mode = <GPHY_MODE_GE> + }; diff --git a/arch/mips/lantiq/xway/sysctrl.c b/arch/mips/lantiq/xway/sysctrl.c index 706639a343bc..87eab4d288e5 100644 --- a/arch/mips/lantiq/xway/sysctrl.c +++ b/arch/mips/lantiq/xway/sysctrl.c @@ -518,7 +518,8 @@ void __init ltq_soc_init(void) clkdev_add_pmu("1e108000.eth", NULL, 0, 0, PMU_SWITCH | PMU_PPE_DP | PMU_PPE_TC); clkdev_add_pmu("1da00000.usif", "NULL", 1, 0, PMU_USIF); - clkdev_add_pmu("1f203000.rcu", "gphy", 1, 0, PMU_GPHY); + clkdev_add_pmu("1f203020.gphy", NULL, 1, 0, PMU_GPHY); + clkdev_add_pmu("1f203068.gphy", NULL, 1, 0, PMU_GPHY); clkdev_add_pmu("1e103100.deu", NULL, 1, 0, PMU_DEU); clkdev_add_pmu("1e116000.mei", "afe", 1, 2, PMU_ANALOG_DSL_AFE); clkdev_add_pmu("1e116000.mei", "dfe", 1, 0, PMU_DFE); @@ -541,7 +542,8 @@ void __init ltq_soc_init(void) PMU_SWITCH | PMU_PPE_DPLUS | PMU_PPE_DPLUM | PMU_PPE_EMA | PMU_PPE_TC | PMU_PPE_SLL01 | PMU_PPE_QSB | PMU_PPE_TOP); - clkdev_add_pmu("1f203000.rcu", "gphy", 0, 0, PMU_GPHY); + clkdev_add_pmu("1f203020.gphy", NULL, 0, 0, PMU_GPHY); + clkdev_add_pmu("1f203068.gphy", NULL, 0, 0, PMU_GPHY); clkdev_add_pmu("1e103000.sdio", NULL, 1, 0, PMU_SDIO); clkdev_add_pmu("1e103100.deu", NULL, 1, 0, PMU_DEU); clkdev_add_pmu("1e116000.mei", "dfe", 1, 0, PMU_DFE); diff --git a/drivers/soc/lantiq/Makefile b/drivers/soc/lantiq/Makefile index 35aa86bd1023..be9e866d53e5 100644 --- a/drivers/soc/lantiq/Makefile +++ b/drivers/soc/lantiq/Makefile @@ -1 +1,2 @@ obj-y += fpi-bus.o +obj-$(CONFIG_XRX200_PHY_FW) += gphy.o diff --git a/drivers/soc/lantiq/gphy.c b/drivers/soc/lantiq/gphy.c new file mode 100644 index 000000000000..4c84447b0a84 --- /dev/null +++ b/drivers/soc/lantiq/gphy.c @@ -0,0 +1,261 @@ +/* + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + * Copyright (C) 2012 John Crispin <blogic@phrozen.org> + * Copyright (C) 2016 Martin Blumenstingl <martin.blumenstingl@googlemail.com> + * Copyright (C) 2017 Hauke Mehrtens <hauke@hauke-m.de> + */ + +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/dma-mapping.h> +#include <linux/firmware.h> +#include <linux/mfd/syscon.h> +#include <linux/module.h> +#include <linux/reboot.h> +#include <linux/regmap.h> +#include <linux/reset.h> +#include <linux/of_device.h> +#include <linux/of_platform.h> +#include <linux/property.h> +#include <dt-bindings/mips/lantiq_rcu_gphy.h> + +#include <lantiq_soc.h> + +#define XRX200_GPHY_FW_ALIGN (16 * 1024) + +struct xway_gphy_priv { + struct clk *gphy_clk_gate; + struct reset_control *gphy_reset; + struct reset_control *gphy_reset2; + struct notifier_block gphy_reboot_nb; + void __iomem *membase; + char *fw_name; + dma_addr_t dma_addr; + void *fw_addr; + size_t size; +}; + +struct xway_gphy_match_data { + char *fe_firmware_name; + char *ge_firmware_name; +}; + +static const struct xway_gphy_match_data xrx200a1x_gphy_data = { + .fe_firmware_name = "lantiq/xrx200_phy22f_a14.bin", + .ge_firmware_name = "lantiq/xrx200_phy11g_a14.bin", +}; + +static const struct xway_gphy_match_data xrx200a2x_gphy_data = { + .fe_firmware_name = "lantiq/xrx200_phy22f_a22.bin", + .ge_firmware_name = "lantiq/xrx200_phy11g_a22.bin", +}; + +static const struct xway_gphy_match_data xrx300_gphy_data = { + .fe_firmware_name = "lantiq/xrx300_phy22f_a21.bin", + .ge_firmware_name = "lantiq/xrx300_phy11g_a21.bin", +}; + +static const struct of_device_id xway_gphy_match[] = { + { .compatible = "lantiq,xrx200a1x-gphy", .data = &xrx200a1x_gphy_data }, + { .compatible = "lantiq,xrx200a2x-gphy", .data = &xrx200a2x_gphy_data }, + { .compatible = "lantiq,xrx300-gphy", .data = &xrx300_gphy_data }, + { .compatible = "lantiq,xrx330-gphy", .data = &xrx300_gphy_data }, + {}, +}; +MODULE_DEVICE_TABLE(of, xway_gphy_match); + +static struct xway_gphy_priv *to_xway_gphy_priv(struct notifier_block *nb) +{ + return container_of(nb, struct xway_gphy_priv, gphy_reboot_nb); +} + +static int xway_gphy_reboot_notify(struct notifier_block *reboot_nb, + unsigned long code, void *unused) +{ + struct xway_gphy_priv *priv = to_xway_gphy_priv(reboot_nb); + + if (priv) { + reset_control_assert(priv->gphy_reset); + reset_control_assert(priv->gphy_reset2); + } + + return NOTIFY_DONE; +} + +static int xway_gphy_load(struct device *dev, struct xway_gphy_priv *priv, + dma_addr_t *dev_addr) +{ + const struct firmware *fw; + void *fw_addr_align; + int ret; + + ret = request_firmware(&fw, priv->fw_name, dev); + if (ret) { + dev_err(dev, "failed to load firmware: %s, error: %i\n", + priv->fw_name, ret); + return ret; + } + + /* + * GPHY cores need the firmware code in a persistent and contiguous + * memory area with a 16 kB boundary aligned start address. + */ + priv->size = fw->size + XRX200_GPHY_FW_ALIGN; + + priv->fw_addr = dma_alloc_coherent(dev, priv->size, + &priv->dma_addr, GFP_KERNEL); + if (priv->fw_addr) { + fw_addr_align = PTR_ALIGN(priv->fw_addr, XRX200_GPHY_FW_ALIGN); + *dev_addr = ALIGN(priv->dma_addr, XRX200_GPHY_FW_ALIGN); + memcpy(fw_addr_align, fw->data, fw->size); + } else { + dev_err(dev, "failed to alloc firmware memory\n"); + ret = -ENOMEM; + } + + release_firmware(fw); + + return ret; +} + +static int xway_gphy_of_probe(struct platform_device *pdev, struct xway_gphy_priv *priv) +{ + struct device *dev = &pdev->dev; + const struct xway_gphy_match_data *gphy_fw_name_cfg; + u32 gphy_mode; + int ret; + struct resource *res_gphy; + + gphy_fw_name_cfg = of_device_get_match_data(dev); + + priv->gphy_clk_gate = devm_clk_get(dev, NULL); + if (IS_ERR(priv->gphy_clk_gate)) { + dev_err(dev, "Failed to lookup gate clock\n"); + return PTR_ERR(priv->gphy_clk_gate); + } + + res_gphy = platform_get_resource(pdev, IORESOURCE_MEM, 0); + priv->membase = devm_ioremap_resource(dev, res_gphy); + if (IS_ERR(priv->membase)) + return PTR_ERR(priv->membase); + + priv->gphy_reset = devm_reset_control_get(dev, "gphy"); + if (IS_ERR(priv->gphy_reset)) { + if (PTR_ERR(priv->gphy_reset) != -EPROBE_DEFER) + dev_err(dev, "Failed to lookup gphy reset\n"); + return PTR_ERR(priv->gphy_reset); + } + + priv->gphy_reset2 = devm_reset_control_get_optional(dev, "gphy2"); + if (IS_ERR(priv->gphy_reset2)) + return PTR_ERR(priv->gphy_reset2); + + ret = device_property_read_u32(dev, "lantiq,gphy-mode", &gphy_mode); + /* Default to GE mode */ + if (ret) + gphy_mode = GPHY_MODE_GE; + + switch (gphy_mode) { + case GPHY_MODE_FE: + priv->fw_name = gphy_fw_name_cfg->fe_firmware_name; + break; + case GPHY_MODE_GE: + priv->fw_name = gphy_fw_name_cfg->ge_firmware_name; + break; + default: + dev_err(dev, "Unknown GPHY mode %d\n", gphy_mode); + return -EINVAL; + } + + return 0; +} + +static int xway_gphy_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct xway_gphy_priv *priv; + dma_addr_t fw_addr = 0; + int ret; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + ret = xway_gphy_of_probe(pdev, priv); + if (ret) + return ret; + + ret = clk_prepare_enable(priv->gphy_clk_gate); + if (ret) + return ret; + + ret = xway_gphy_load(dev, priv, &fw_addr); + if (ret) + return ret; + + reset_control_assert(priv->gphy_reset); + reset_control_assert(priv->gphy_reset2); + + iowrite32be(fw_addr, priv->membase); + + reset_control_deassert(priv->gphy_reset); + reset_control_deassert(priv->gphy_reset2); + + /* assert the gphy reset because it can hang after a reboot: */ + priv->gphy_reboot_nb.notifier_call = xway_gphy_reboot_notify; + priv->gphy_reboot_nb.priority = -1; + + ret = register_reboot_notifier(&priv->gphy_reboot_nb); + if (ret) + dev_warn(dev, "Failed to register reboot notifier\n"); + + platform_set_drvdata(pdev, priv); + + return ret; +} + +static int xway_gphy_remove(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct xway_gphy_priv *priv = platform_get_drvdata(pdev); + int ret; + + reset_control_assert(priv->gphy_reset); + reset_control_assert(priv->gphy_reset2); + + iowrite32be(0, priv->membase); + + clk_disable_unprepare(priv->gphy_clk_gate); + + dma_free_coherent(dev, priv->size, priv->fw_addr, priv->dma_addr); + + ret = unregister_reboot_notifier(&priv->gphy_reboot_nb); + if (ret) + dev_warn(dev, "Failed to unregister reboot notifier\n"); + + return 0; +} + +static struct platform_driver xway_gphy_driver = { + .probe = xway_gphy_probe, + .remove = xway_gphy_remove, + .driver = { + .name = "xway-rcu-gphy", + .of_match_table = xway_gphy_match, + }, +}; + +module_platform_driver(xway_gphy_driver); + +MODULE_FIRMWARE("lantiq/xrx300_phy11g_a21.bin"); +MODULE_FIRMWARE("lantiq/xrx300_phy22f_a21.bin"); +MODULE_FIRMWARE("lantiq/xrx200_phy11g_a14.bin"); +MODULE_FIRMWARE("lantiq/xrx200_phy11g_a22.bin"); +MODULE_FIRMWARE("lantiq/xrx200_phy22f_a14.bin"); +MODULE_FIRMWARE("lantiq/xrx200_phy22f_a22.bin"); +MODULE_AUTHOR("Martin Blumenstingl <martin.blumenstingl@googlemail.com>"); +MODULE_DESCRIPTION("Lantiq XWAY GPHY Firmware Loader"); +MODULE_LICENSE("GPL"); diff --git a/include/dt-bindings/mips/lantiq_rcu_gphy.h b/include/dt-bindings/mips/lantiq_rcu_gphy.h new file mode 100644 index 000000000000..fa1a63773342 --- /dev/null +++ b/include/dt-bindings/mips/lantiq_rcu_gphy.h @@ -0,0 +1,15 @@ +/* + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + * Copyright (C) 2016 Martin Blumenstingl <martin.blumenstingl@googlemail.com> + * Copyright (C) 2017 Hauke Mehrtens <hauke@hauke-m.de> + */ +#ifndef _DT_BINDINGS_MIPS_LANTIQ_RCU_GPHY_H +#define _DT_BINDINGS_MIPS_LANTIQ_RCU_GPHY_H + +#define GPHY_MODE_GE 1 +#define GPHY_MODE_FE 2 + +#endif /* _DT_BINDINGS_MIPS_LANTIQ_RCU_GPHY_H */ -- 2.11.0
next prev parent reply other threads:[~2017-06-19 22:26 UTC|newest] Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-06-19 22:25 [PATCH v4 00/16] MIPS: lantiq: handle RCU register by separate drivers Hauke Mehrtens 2017-06-19 22:25 ` Hauke Mehrtens [not found] ` <20170619222608.13344-1-hauke-5/S+JYg5SzeELgA04lAiVw@public.gmane.org> 2017-06-19 22:25 ` [PATCH v4 01/16] MIPS: lantiq: Use of_platform_default_populate instead of __dt_register_buses Hauke Mehrtens 2017-06-19 22:25 ` Hauke Mehrtens 2017-06-19 22:25 ` [PATCH v4 02/16] mtd: lantiq-flash: drop check of boot select Hauke Mehrtens 2017-06-19 22:25 ` Hauke Mehrtens 2017-06-19 22:25 ` [PATCH v4 03/16] mtd: spi-falcon: " Hauke Mehrtens 2017-06-19 22:25 ` Hauke Mehrtens 2017-06-19 22:25 ` [PATCH v4 04/16] watchdog: lantiq: access boot cause register through regmap Hauke Mehrtens 2017-06-19 22:25 ` Hauke Mehrtens 2017-06-19 22:25 ` [PATCH v4 05/16] watchdog: lantiq: add device tree binding documentation Hauke Mehrtens 2017-06-19 22:25 ` Hauke Mehrtens 2017-06-19 22:25 ` [PATCH v4 06/16] MIPS: lantiq: Enable MFD_SYSCON to be able to use it for the RCU MFD Hauke Mehrtens 2017-06-19 22:25 ` Hauke Mehrtens 2017-06-19 22:25 ` [PATCH v4 07/16] Documentation: DT: MIPS: lantiq: Add docs for the RCU bindings Hauke Mehrtens 2017-06-19 22:25 ` Hauke Mehrtens 2017-06-19 22:26 ` [PATCH v4 08/16] MIPS: lantiq: Convert the fpi bus driver to a platform_driver Hauke Mehrtens 2017-06-19 22:26 ` Hauke Mehrtens 2017-06-19 22:26 ` [PATCH v4 09/16] MIPS: lantiq: remove ltq_reset_cause() and ltq_boot_select() Hauke Mehrtens 2017-06-19 22:26 ` Hauke Mehrtens 2017-06-19 22:26 ` [PATCH v4 10/16] reset: Add a reset controller driver for the Lantiq XWAY based SoCs Hauke Mehrtens 2017-06-19 22:26 ` Hauke Mehrtens [not found] ` <20170619222608.13344-11-hauke-5/S+JYg5SzeELgA04lAiVw@public.gmane.org> 2017-06-19 23:29 ` Andy Shevchenko 2017-06-19 23:29 ` Andy Shevchenko [not found] ` <CAHp75Vc+UGCat0QcVeDuxEugc9r=yB5HNPnHuzAdmQnkK2=hGg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2017-06-20 22:17 ` Hauke Mehrtens 2017-06-20 22:17 ` Hauke Mehrtens 2017-06-19 22:26 ` [PATCH v4 11/16] MIPS: lantiq: remove old reset controller implementation Hauke Mehrtens 2017-06-19 22:26 ` Hauke Mehrtens 2017-06-19 22:26 ` Hauke Mehrtens [this message] 2017-06-19 22:26 ` [PATCH v4 12/16] MIPS: lantiq: Add a GPHY driver which uses the RCU syscon-mfd Hauke Mehrtens [not found] ` <20170619222608.13344-13-hauke-5/S+JYg5SzeELgA04lAiVw@public.gmane.org> 2017-06-19 23:36 ` Andy Shevchenko 2017-06-19 23:36 ` Andy Shevchenko [not found] ` <CAHp75VcDgC7n3FVig0r0RBg=B655sv_jWQt7RWXU9uPx9QGvqA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2017-06-20 22:19 ` Hauke Mehrtens 2017-06-20 22:19 ` Hauke Mehrtens 2017-06-19 22:26 ` [PATCH v4 13/16] MIPS: lantiq: remove old GPHY loader code Hauke Mehrtens 2017-06-19 22:26 ` Hauke Mehrtens 2017-06-19 22:26 ` [PATCH v4 14/16] phy: Add an USB PHY driver for the Lantiq SoCs using the RCU module Hauke Mehrtens 2017-06-19 22:26 ` Hauke Mehrtens [not found] ` <20170619222608.13344-15-hauke-5/S+JYg5SzeELgA04lAiVw@public.gmane.org> 2017-06-19 23:39 ` Andy Shevchenko 2017-06-19 23:39 ` Andy Shevchenko [not found] ` <CAHp75VcYoPBd651s7a=y5yB3mjRG4W+=gWbeKFzwyw04qcg-MQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2017-06-20 22:20 ` Hauke Mehrtens 2017-06-20 22:20 ` Hauke Mehrtens 2017-06-19 22:26 ` [PATCH v4 15/16] MIPS: lantiq: remove old USB PHY initialisation Hauke Mehrtens 2017-06-19 22:26 ` Hauke Mehrtens 2017-06-19 22:26 ` [PATCH v4 16/16] MIPS: lantiq: Remove the arch/mips/lantiq/xway/reset.c implementation Hauke Mehrtens 2017-06-19 22:26 ` Hauke Mehrtens
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