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Message-ID: <53F4B7AB.1020009@ti.com>
Date: Wed, 20 Aug 2014 20:28:51 +0530
From: Kishon Vijay Abraham I <kishon@...com>
To: Gabriel FERNANDEZ <gabriel.fernandez@...com>,
Rob Herring <robh+dt@...nel.org>,
Pawel Moll <pawel.moll@....com>,
Mark Rutland <mark.rutland@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>,
Srinivas Kandagatla <srinivas.kandagatla@...il.com>,
Maxime Coquelin <maxime.coquelin@...com>,
Patrice Chotard <patrice.chotard@...com>,
Russell King <linux@....linux.org.uk>,
Grant Likely <grant.likely@...aro.org>
CC: <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>, <kernel@...inux.com>,
Gabriel Fernandez <gabriel.fernandez@...aro.org>,
alexandre torgue <alexandre.torgue@...com>,
Giuseppe Cavallaro <peppe.cavallaro@...com>
Subject: Re: [PATCH 3/5] phy: miphy28lp: Provide support for the MiPHY28lp
Generic PHY
Hi,
On Wednesday 13 August 2014 09:04 PM, Gabriel FERNANDEZ wrote:
> The MiPHY28lp is a Generic PHY which can serve various SATA or PCIe
> or USB3 devices.
>
> Signed-off-by: alexandre torgue <alexandre.torgue@...com>
> Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@...com>
> Signed-off-by: Gabriel Fernandez <gabriel.fernandez@...aro.org>
> ---
> drivers/phy/Kconfig | 8 +
> drivers/phy/Makefile | 1 +
> drivers/phy/phy-miphy28lp.c | 736 ++++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 745 insertions(+)
> create mode 100644 drivers/phy/phy-miphy28lp.c
>
> diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
> index 0dd7427..2053f72 100644
> --- a/drivers/phy/Kconfig
> +++ b/drivers/phy/Kconfig
> @@ -230,4 +230,12 @@ config PHY_XGENE
> help
> This option enables support for APM X-Gene SoC multi-purpose PHY.
>
> +config PHY_MIPHY28LP
> + tristate "STMicroelectronics MIPHY28LP PHY driver for STiH407"
> + depends on ARCH_STI
> + depends on GENERIC_PHY
> + help
> + Enable this to support the miphy transceiver (for SATA/PCIE/USB3)
> + that is part of STMicroelectronics STiH407 SoC.
> +
> endmenu
> diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
> index 95c69ed..f7e7c59 100644
> --- a/drivers/phy/Makefile
> +++ b/drivers/phy/Makefile
> @@ -8,6 +8,7 @@ obj-$(CONFIG_BCM_KONA_USB2_PHY) += phy-bcm-kona-usb2.o
> obj-$(CONFIG_PHY_EXYNOS_DP_VIDEO) += phy-exynos-dp-video.o
> obj-$(CONFIG_PHY_EXYNOS_MIPI_VIDEO) += phy-exynos-mipi-video.o
> obj-$(CONFIG_PHY_MVEBU_SATA) += phy-mvebu-sata.o
> +obj-$(CONFIG_PHY_MIPHY28LP) += phy-miphy28lp.o
> obj-$(CONFIG_PHY_MIPHY365X) += phy-miphy365x.o
> obj-$(CONFIG_OMAP_CONTROL_PHY) += phy-omap-control.o
> obj-$(CONFIG_OMAP_USB2) += phy-omap-usb2.o
> diff --git a/drivers/phy/phy-miphy28lp.c b/drivers/phy/phy-miphy28lp.c
> new file mode 100644
> index 0000000..767614c
> --- /dev/null
> +++ b/drivers/phy/phy-miphy28lp.c
> @@ -0,0 +1,736 @@
> +/*
> + * Copyright (C) 2014 STMicroelectronics
> + *
> + * STMicroelectronics PHY driver MiPHY28lp (for SoC STiH407).
> + *
> + * Author: Alexandre Torgue <alexandre.torgue@...com>
> + *
> + * 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.
> + *
> + */
> +
> +#include <linux/platform_device.h>
> +#include <linux/io.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/of_platform.h>
> +#include <linux/of_address.h>
> +#include <linux/clk.h>
> +#include <linux/phy/phy.h>
> +#include <linux/delay.h>
> +#include <linux/mfd/syscon.h>
> +#include <linux/regmap.h>
> +#include <linux/reset.h>
> +
> +#include <dt-bindings/phy/phy-miphy28lp.h>
> +
> +/* MiPHY registers */
> +#define MIPHY_STATUS_1 0x02
> +#define MIPHY_PHY_RDY 0x01
> +#define MIPHY_PLL_HFC_RDY 0x06
> +#define MIPHY_COMP_FSM_6 0x3f
> +#define MIPHY_COMP_DONE 0x80
> +
> +#define MIPHY_CTRL_REG 0x04
> +#define MIPHY_PX_RX_POL BIT(5)
> +
> +/*
> + * On STiH407 the glue logic can be different among MiPHY devices; for example:
> + * MiPHY0: OSC_FORCE_EXT means:
> + * 0: 30MHz crystal clk - 1: 100MHz ext clk routed through MiPHY1
> + * MiPHY1: OSC_FORCE_EXT means:
> + * 1: 30MHz crystal clk - 0: 100MHz ext clk routed through MiPHY1
> + * Some devices have not the possibility to check if the osc is ready.
> + */
> +#define MIPHY_OSC_FORCE_EXT BIT(3)
> +#define MIPHY_OSC_RDY BIT(5)
> +
> +#define MIPHY_CTRL_MASK 0xf
> +#define MIPHY_CTRL_DEFAULT 0
> +#define MIPHY_CTRL_SYNC_D_EN BIT(2)
> +
> +/* SATA / PCIe defines */
> +#define SATA_CTRL_MASK 0x7
> +#define PCIE_CTRL_MASK 0xff
> +#define SATA_CTRL_SELECT_SATA 1
> +#define SATA_CTRL_SELECT_PCIE 0
> +#define SYSCFG_PCIE_PCIE_VAL 0x80
> +#define SATA_SPDMODE 1
> +
> +struct miphy28lp_phy {
> + struct phy *phy;
> + struct miphy28lp_dev *phydev;
> + void __iomem *base;
> + void __iomem *pipebase;
> +
> + bool osc_force_ext;
> + bool osc_rdy;
> + bool px_rx_pol_inv;
> +
> + struct reset_control *miphy_rst;
> +
> + u32 sata_gen;
> +
> + /* Sysconfig registers offsets needed to configure the device */
> + u32 syscfg_miphy_ctrl;
> + u32 syscfg_miphy_status;
> + u32 syscfg_pci;
> + u32 syscfg_sata;
> + u8 type;
> +};
> +
> +struct miphy28lp_dev {
> + struct device *dev;
> + struct regmap *regmap;
> + struct mutex miphy_mutex;
> + struct miphy28lp_phy **phys;
> +};
> +
> +struct miphy_initval {
> + u16 reg;
> + u16 val;
> +};
> +
> +enum miphy_sata_gen { SATA_GEN1, SATA_GEN2, SATA_GEN3 };
> +
> +static char *miphy_type_name[] = { "sata-up", "pcie-up", "usb3-up" };
> +
> +static const struct miphy_initval miphylp28_initvals_sata[] = {
> + /* Putting Macro in reset */
> + {0x00, 0x01}, {0x00, 0x03},
> + /* Wait for a while */
> + {0x00, 0x01}, {0x04, 0x1c},
> + /* PLL calibration */
> + {0xeb, 0x1d}, {0x0d, 0x1e}, {0x0f, 0x00},
> + /* Writing The PLL Ratio */
> + {0xd4, 0xc8}, {0xd5, 0x00}, {0xd6, 0x00}, {0xd7, 0x00},
> + {0xd3, 0x00}, {0x0f, 0x02}, {0x0e, 0x0a}, {0x0f, 0x01},
> + {0x0e, 0x0a}, {0x0f, 0x00}, {0x0e, 0x0a}, {0x4e, 0xd1},
> + {0x4e, 0xd1},
> + /* Rx Calibration */
> + {0x99, 0x1f}, {0x0a, 0x41}, {0x7a, 0x0d}, {0x7f, 0x7d},
> + {0x80, 0x56}, {0x81, 0x00}, {0x7b, 0x00}, {0xc1, 0x01},
> + {0xc2, 0x01}, {0x97, 0xf3}, {0xc9, 0x02}, {0xca, 0x02},
> + {0xcb, 0x02}, {0xcc, 0x0a}, {0x9d, 0xe5}, {0x0f, 0x00},
> + {0x0e, 0x02}, {0x0e, 0x00}, {0x63, 0x00}, {0x64, 0xaf},
> + {0x0f, 0x00}, {0x49, 0x07}, {0x0f, 0x01}, {0x49, 0x07},
> + {0x0f, 0x02}, {0x49, 0x07}, {0x0f, 0x03}, {0x49, 0x07},
> + {0x0f, 0x00}, {0x4a, 0x50}, {0x4a, 0x53}, {0x4b, 0x00},
> + {0x4b, 0x00}, {0x0f, 0x01}, {0x0e, 0x04}, {0x0e, 0x05},
> + {0x63, 0x00}, {0x64, 0xae}, {0x0f, 0x00}, {0x49, 0x07},
> + {0x0f, 0x01}, {0x49, 0x07}, {0x0f, 0x02}, {0x49, 0x07},
> + {0x0f, 0x03}, {0x49, 0x07}, {0x0f, 0x01}, {0x4a, 0x73},
> + {0x4a, 0x72}, {0x4b, 0x20}, {0x4b, 0x20}, {0x0f, 0x02},
> + {0x0e, 0x09}, {0x0e, 0x0a}, {0x63, 0x00}, {0x64, 0xae},
> + {0x0f, 0x00}, {0x49, 0x07}, {0x0f, 0x01}, {0x49, 0x07},
> + {0x0f, 0x02}, {0x49, 0x07}, {0x0f, 0x03}, {0x49, 0x07},
> + {0x0f, 0x02}, {0x4a, 0xc2}, {0x4a, 0xc0}, {0x4b, 0x20},
> + {0x4b, 0x20}, {0xcd, 0x21}, {0xcd, 0x21}, {0x00, 0x00},
> + {0x00, 0x01}, {0x00, 0x00}, {0x01, 0x04}, {0x01, 0x05},
> + {0xe9, 0x00}, {0x0d, 0x1e}, {0x3a, 0x40}, {0x01, 0x01},
> + {0x01, 0x00}, {0xe9, 0x40}, {0x0a, 0x41}, {0x0f, 0X00},
> + {0x0b, 0x00}, {0x0b, 0x00}, {0x62, 0x00}, {0x0f, 0x00},
> + {0xe3, 0x02}, {0xe3, 0x02}, {0x26, 0x27}, {0x26, 0x00},
> + {0x26, 0x62}, {0x26, 0x00}, {0x0f, 0x00}, {0x0f, 0x01},
> + {0x0f, 0x02}, {0x0f, 0x00},
I'm not in for doing this sort of initialization. Sorry.
Thanks
Kishon
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