diff options
Diffstat (limited to 'drivers/phy/phy-brcmstb-sata.c')
| -rw-r--r-- | drivers/phy/phy-brcmstb-sata.c | 250 |
1 files changed, 0 insertions, 250 deletions
diff --git a/drivers/phy/phy-brcmstb-sata.c b/drivers/phy/phy-brcmstb-sata.c deleted file mode 100644 index a23172ff40e3..000000000000 --- a/drivers/phy/phy-brcmstb-sata.c +++ /dev/null @@ -1,250 +0,0 @@ -/* - * Broadcom SATA3 AHCI Controller PHY Driver - * - * Copyright © 2009-2015 Broadcom Corporation - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#include <linux/device.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/io.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/of.h> -#include <linux/phy/phy.h> -#include <linux/platform_device.h> - -#define SATA_MDIO_BANK_OFFSET 0x23c -#define SATA_MDIO_REG_OFFSET(ofs) ((ofs) * 4) - -#define MAX_PORTS 2 - -/* Register offset between PHYs in PCB space */ -#define SATA_MDIO_REG_28NM_SPACE_SIZE 0x1000 - -/* The older SATA PHY registers duplicated per port registers within the map, - * rather than having a separate map per port. - */ -#define SATA_MDIO_REG_40NM_SPACE_SIZE 0x10 - -enum brcm_sata_phy_version { - BRCM_SATA_PHY_28NM, - BRCM_SATA_PHY_40NM, -}; - -struct brcm_sata_port { - int portnum; - struct phy *phy; - struct brcm_sata_phy *phy_priv; - bool ssc_en; -}; - -struct brcm_sata_phy { - struct device *dev; - void __iomem *phy_base; - enum brcm_sata_phy_version version; - - struct brcm_sata_port phys[MAX_PORTS]; -}; - -enum sata_mdio_phy_regs { - PLL_REG_BANK_0 = 0x50, - PLL_REG_BANK_0_PLLCONTROL_0 = 0x81, - - TXPMD_REG_BANK = 0x1a0, - TXPMD_CONTROL1 = 0x81, - TXPMD_CONTROL1_TX_SSC_EN_FRC = BIT(0), - TXPMD_CONTROL1_TX_SSC_EN_FRC_VAL = BIT(1), - TXPMD_TX_FREQ_CTRL_CONTROL1 = 0x82, - TXPMD_TX_FREQ_CTRL_CONTROL2 = 0x83, - TXPMD_TX_FREQ_CTRL_CONTROL2_FMIN_MASK = 0x3ff, - TXPMD_TX_FREQ_CTRL_CONTROL3 = 0x84, - TXPMD_TX_FREQ_CTRL_CONTROL3_FMAX_MASK = 0x3ff, -}; - -static inline void __iomem *brcm_sata_phy_base(struct brcm_sata_port *port) -{ - struct brcm_sata_phy *priv = port->phy_priv; - u32 offset = 0; - - if (priv->version == BRCM_SATA_PHY_28NM) - offset = SATA_MDIO_REG_28NM_SPACE_SIZE; - else if (priv->version == BRCM_SATA_PHY_40NM) - offset = SATA_MDIO_REG_40NM_SPACE_SIZE; - else - dev_err(priv->dev, "invalid phy version\n"); - - return priv->phy_base + (port->portnum * offset); -} - -static void brcm_sata_mdio_wr(void __iomem *addr, u32 bank, u32 ofs, - u32 msk, u32 value) -{ - u32 tmp; - - writel(bank, addr + SATA_MDIO_BANK_OFFSET); - tmp = readl(addr + SATA_MDIO_REG_OFFSET(ofs)); - tmp = (tmp & msk) | value; - writel(tmp, addr + SATA_MDIO_REG_OFFSET(ofs)); -} - -/* These defaults were characterized by H/W group */ -#define FMIN_VAL_DEFAULT 0x3df -#define FMAX_VAL_DEFAULT 0x3df -#define FMAX_VAL_SSC 0x83 - -static void brcm_sata_cfg_ssc(struct brcm_sata_port *port) -{ - void __iomem *base = brcm_sata_phy_base(port); - struct brcm_sata_phy *priv = port->phy_priv; - u32 tmp; - - /* override the TX spread spectrum setting */ - tmp = TXPMD_CONTROL1_TX_SSC_EN_FRC_VAL | TXPMD_CONTROL1_TX_SSC_EN_FRC; - brcm_sata_mdio_wr(base, TXPMD_REG_BANK, TXPMD_CONTROL1, ~tmp, tmp); - - /* set fixed min freq */ - brcm_sata_mdio_wr(base, TXPMD_REG_BANK, TXPMD_TX_FREQ_CTRL_CONTROL2, - ~TXPMD_TX_FREQ_CTRL_CONTROL2_FMIN_MASK, - FMIN_VAL_DEFAULT); - - /* set fixed max freq depending on SSC config */ - if (port->ssc_en) { - dev_info(priv->dev, "enabling SSC on port %d\n", port->portnum); - tmp = FMAX_VAL_SSC; - } else { - tmp = FMAX_VAL_DEFAULT; - } - - brcm_sata_mdio_wr(base, TXPMD_REG_BANK, TXPMD_TX_FREQ_CTRL_CONTROL3, - ~TXPMD_TX_FREQ_CTRL_CONTROL3_FMAX_MASK, tmp); -} - -static int brcm_sata_phy_init(struct phy *phy) -{ - struct brcm_sata_port *port = phy_get_drvdata(phy); - - brcm_sata_cfg_ssc(port); - - return 0; -} - -static const struct phy_ops phy_ops = { - .init = brcm_sata_phy_init, - .owner = THIS_MODULE, -}; - -static const struct of_device_id brcm_sata_phy_of_match[] = { - { .compatible = "brcm,bcm7445-sata-phy", - .data = (void *)BRCM_SATA_PHY_28NM }, - { .compatible = "brcm,bcm7425-sata-phy", - .data = (void *)BRCM_SATA_PHY_40NM }, - {}, -}; -MODULE_DEVICE_TABLE(of, brcm_sata_phy_of_match); - -static int brcm_sata_phy_probe(struct platform_device *pdev) -{ - struct device *dev = &pdev->dev; - struct device_node *dn = dev->of_node, *child; - const struct of_device_id *of_id; - struct brcm_sata_phy *priv; - struct resource *res; - struct phy_provider *provider; - int ret, count = 0; - - if (of_get_child_count(dn) == 0) - return -ENODEV; - - priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); - if (!priv) - return -ENOMEM; - dev_set_drvdata(dev, priv); - priv->dev = dev; - - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy"); - priv->phy_base = devm_ioremap_resource(dev, res); - if (IS_ERR(priv->phy_base)) - return PTR_ERR(priv->phy_base); - - of_id = of_match_node(brcm_sata_phy_of_match, dn); - if (of_id) - priv->version = (enum brcm_sata_phy_version)of_id->data; - else - priv->version = BRCM_SATA_PHY_28NM; - - for_each_available_child_of_node(dn, child) { - unsigned int id; - struct brcm_sata_port *port; - - if (of_property_read_u32(child, "reg", &id)) { - dev_err(dev, "missing reg property in node %s\n", - child->name); - ret = -EINVAL; - goto put_child; - } - - if (id >= MAX_PORTS) { - dev_err(dev, "invalid reg: %u\n", id); - ret = -EINVAL; - goto put_child; - } - if (priv->phys[id].phy) { - dev_err(dev, "already registered port %u\n", id); - ret = -EINVAL; - goto put_child; - } - - port = &priv->phys[id]; - port->portnum = id; - port->phy_priv = priv; - port->phy = devm_phy_create(dev, child, &phy_ops); - port->ssc_en = of_property_read_bool(child, "brcm,enable-ssc"); - if (IS_ERR(port->phy)) { - dev_err(dev, "failed to create PHY\n"); - ret = PTR_ERR(port->phy); - goto put_child; - } - - phy_set_drvdata(port->phy, port); - count++; - } - - provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); - if (IS_ERR(provider)) { - dev_err(dev, "could not register PHY provider\n"); - return PTR_ERR(provider); - } - - dev_info(dev, "registered %d port(s)\n", count); - - return 0; -put_child: - of_node_put(child); - return ret; -} - -static struct platform_driver brcm_sata_phy_driver = { - .probe = brcm_sata_phy_probe, - .driver = { - .of_match_table = brcm_sata_phy_of_match, - .name = "brcmstb-sata-phy", - } -}; -module_platform_driver(brcm_sata_phy_driver); - -MODULE_DESCRIPTION("Broadcom STB SATA PHY driver"); -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Marc Carino"); -MODULE_AUTHOR("Brian Norris"); -MODULE_ALIAS("platform:phy-brcmstb-sata"); |