diff options
author | Tom Rini <trini@konsulko.com> | 2017-05-09 16:11:36 -0400 |
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committer | Tom Rini <trini@konsulko.com> | 2017-05-09 16:11:36 -0400 |
commit | dd9999d5f4d3a0354c959fa3bccc0957a1164bf5 (patch) | |
tree | 7d37b3f93f256bc04e6f5492b20dbc2faeb8edb6 /drivers/phy | |
parent | a284212963277114ad60e3442d74f095102a9de5 (diff) | |
parent | 9d0c4decfeaa7e312f50e0debb677f60ad170f61 (diff) | |
download | u-boot-dd9999d5f4d3a0354c959fa3bccc0957a1164bf5.tar.gz |
Merge git://git.denx.de/u-boot-dm
Diffstat (limited to 'drivers/phy')
-rw-r--r-- | drivers/phy/Kconfig | 62 | ||||
-rw-r--r-- | drivers/phy/Makefile | 10 | ||||
-rw-r--r-- | drivers/phy/phy-uclass.c | 139 | ||||
-rw-r--r-- | drivers/phy/sandbox-phy.c | 108 | ||||
-rw-r--r-- | drivers/phy/ti-pipe3-phy.c | 373 |
5 files changed, 692 insertions, 0 deletions
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig new file mode 100644 index 0000000000..a91a6946b8 --- /dev/null +++ b/drivers/phy/Kconfig @@ -0,0 +1,62 @@ + +menu "PHY Subsystem" + +config PHY + bool "PHY Core" + depends on DM + help + PHY support. + + This framework is designed to provide a generic interface for PHY + devices. PHY devices are dedicated hardware that handle the physical + layer of the protocols in the OSI model. + PHYs are commonly used for high speed interfaces such as Serial-ATA + or PCI express. + The API provides functions to initialize/deinitialize the + PHY, power on/off the PHY, and reset the PHY. It's meant to be as + compatible as possible with the equivalent framework found in the + linux kernel. + +config SPL_PHY + bool "PHY Core in SPL" + depends on DM + help + PHY support in SPL. + + This framework is designed to provide a generic interface for PHY + devices. PHY devices are dedicated hardware that handle the physical + layer of the protocols (https://en.wikipedia.org/wiki/OSI_model). + PHYs are commonly used for high speed interfaces such as Serial-ATA + or PCI express. + The API provides functions to initialize/deinitialize the + PHY, power on/off the PHY, and reset the PHY. It's meant to be as + compatible as possible with the equivalent framework found in the + linux kernel. + +config PHY_SANDBOX + bool "Sandbox PHY support" + depends on SANDBOX + depends on PHY + help + This select a dummy sandbox PHY driver. It used only to implement + the unit tests for the phy framework + +config PIPE3_PHY + bool "Support omap's PIPE3 PHY" + depends on PHY && ARCH_OMAP2 + help + Support for the omap PIPE3 phy for sata + + This PHY is found on omap devices supporting SATA such as dra7, am57x + and omap5 + +config SPL_PIPE3_PHY + bool "Support omap's PIPE3 PHY in SPL" + depends on SPL_PHY && ARCH_OMAP2 + help + Support for the omap PIPE3 phy for sata in SPL + + This PHY is found on omap devices supporting SATA such as dra7, am57x + and omap5 + +endmenu diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile new file mode 100644 index 0000000000..6ce96d2ccc --- /dev/null +++ b/drivers/phy/Makefile @@ -0,0 +1,10 @@ +# +# Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/ +# Written by Jean-Jacques Hiblot <jjhiblot@ti.com> +# +# SPDX-License-Identifier: GPL-2.0+ +# + +obj-$(CONFIG_$(SPL_)PHY) += phy-uclass.o +obj-$(CONFIG_PHY_SANDBOX) += sandbox-phy.o +obj-$(CONFIG_$(SPL_)PIPE3_PHY) += ti-pipe3-phy.o diff --git a/drivers/phy/phy-uclass.c b/drivers/phy/phy-uclass.c new file mode 100644 index 0000000000..0d8bef76db --- /dev/null +++ b/drivers/phy/phy-uclass.c @@ -0,0 +1,139 @@ +/* + * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/ + * Written by Jean-Jacques Hiblot <jjhiblot@ti.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <dm.h> +#include <generic-phy.h> + +DECLARE_GLOBAL_DATA_PTR; + +static inline struct phy_ops *phy_dev_ops(struct udevice *dev) +{ + return (struct phy_ops *)dev->driver->ops; +} + +static int generic_phy_xlate_offs_flags(struct phy *phy, + struct fdtdec_phandle_args *args) +{ + debug("%s(phy=%p)\n", __func__, phy); + + if (args->args_count > 1) { + debug("Invaild args_count: %d\n", args->args_count); + return -EINVAL; + } + + if (args->args_count) + phy->id = args->args[0]; + else + phy->id = 0; + + + return 0; +} + +int generic_phy_get_by_index(struct udevice *dev, int index, + struct phy *phy) +{ + struct fdtdec_phandle_args args; + struct phy_ops *ops; + int ret; + struct udevice *phydev; + + debug("%s(dev=%p, index=%d, phy=%p)\n", __func__, dev, index, phy); + + assert(phy); + ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, dev_of_offset(dev), + "phys", "#phy-cells", 0, index, + &args); + if (ret) { + debug("%s: fdtdec_parse_phandle_with_args failed: err=%d\n", + __func__, ret); + return ret; + } + + ret = uclass_get_device_by_of_offset(UCLASS_PHY, args.node, &phydev); + if (ret) { + debug("%s: uclass_get_device_by_of_offset failed: err=%d\n", + __func__, ret); + return ret; + } + + phy->dev = phydev; + + ops = phy_dev_ops(phydev); + + if (ops->of_xlate) + ret = ops->of_xlate(phy, &args); + else + ret = generic_phy_xlate_offs_flags(phy, &args); + if (ret) { + debug("of_xlate() failed: %d\n", ret); + goto err; + } + + return 0; + +err: + return ret; +} + +int generic_phy_get_by_name(struct udevice *dev, const char *phy_name, + struct phy *phy) +{ + int index; + + debug("%s(dev=%p, name=%s, phy=%p)\n", __func__, dev, phy_name, phy); + + index = fdt_stringlist_search(gd->fdt_blob, dev_of_offset(dev), + "phy-names", phy_name); + if (index < 0) { + debug("fdt_stringlist_search() failed: %d\n", index); + return index; + } + + return generic_phy_get_by_index(dev, index, phy); +} + +int generic_phy_init(struct phy *phy) +{ + struct phy_ops const *ops = phy_dev_ops(phy->dev); + + return ops->init ? ops->init(phy) : 0; +} + +int generic_phy_reset(struct phy *phy) +{ + struct phy_ops const *ops = phy_dev_ops(phy->dev); + + return ops->reset ? ops->reset(phy) : 0; +} + +int generic_phy_exit(struct phy *phy) +{ + struct phy_ops const *ops = phy_dev_ops(phy->dev); + + return ops->exit ? ops->exit(phy) : 0; +} + +int generic_phy_power_on(struct phy *phy) +{ + struct phy_ops const *ops = phy_dev_ops(phy->dev); + + return ops->power_on ? ops->power_on(phy) : 0; +} + +int generic_phy_power_off(struct phy *phy) +{ + struct phy_ops const *ops = phy_dev_ops(phy->dev); + + return ops->power_off ? ops->power_off(phy) : 0; +} + +UCLASS_DRIVER(phy) = { + .id = UCLASS_PHY, + .name = "phy", +}; diff --git a/drivers/phy/sandbox-phy.c b/drivers/phy/sandbox-phy.c new file mode 100644 index 0000000000..9ad820c24c --- /dev/null +++ b/drivers/phy/sandbox-phy.c @@ -0,0 +1,108 @@ +/* + * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/ + * Written by Jean-Jacques Hiblot <jjhiblot@ti.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <dm.h> +#include <generic-phy.h> + +DECLARE_GLOBAL_DATA_PTR; + +struct sandbox_phy_priv { + bool initialized; + bool on; + bool broken; +}; + +static int sandbox_phy_power_on(struct phy *phy) +{ + struct sandbox_phy_priv *priv = dev_get_priv(phy->dev); + + if (!priv->initialized) + return -EIO; + + if (priv->broken) + return -EIO; + + priv->on = true; + + return 0; +} + +static int sandbox_phy_power_off(struct phy *phy) +{ + struct sandbox_phy_priv *priv = dev_get_priv(phy->dev); + + if (!priv->initialized) + return -EIO; + + if (priv->broken) + return -EIO; + + /* + * for validation purpose, let's says that power off + * works only for PHY 0 + */ + if (phy->id) + return -EIO; + + priv->on = false; + + return 0; +} + +static int sandbox_phy_init(struct phy *phy) +{ + struct sandbox_phy_priv *priv = dev_get_priv(phy->dev); + + priv->initialized = true; + priv->on = true; + + return 0; +} + +static int sandbox_phy_exit(struct phy *phy) +{ + struct sandbox_phy_priv *priv = dev_get_priv(phy->dev); + + priv->initialized = false; + priv->on = false; + + return 0; +} + +static int sandbox_phy_probe(struct udevice *dev) +{ + struct sandbox_phy_priv *priv = dev_get_priv(dev); + + priv->initialized = false; + priv->on = false; + priv->broken = fdtdec_get_bool(gd->fdt_blob, dev_of_offset(dev), + "broken"); + + return 0; +} + +static struct phy_ops sandbox_phy_ops = { + .power_on = sandbox_phy_power_on, + .power_off = sandbox_phy_power_off, + .init = sandbox_phy_init, + .exit = sandbox_phy_exit, +}; + +static const struct udevice_id sandbox_phy_ids[] = { + { .compatible = "sandbox,phy" }, + { } +}; + +U_BOOT_DRIVER(phy_sandbox) = { + .name = "phy_sandbox", + .id = UCLASS_PHY, + .of_match = sandbox_phy_ids, + .ops = &sandbox_phy_ops, + .probe = sandbox_phy_probe, + .priv_auto_alloc_size = sizeof(struct sandbox_phy_priv), +}; diff --git a/drivers/phy/ti-pipe3-phy.c b/drivers/phy/ti-pipe3-phy.c new file mode 100644 index 0000000000..ed80f0ff0b --- /dev/null +++ b/drivers/phy/ti-pipe3-phy.c @@ -0,0 +1,373 @@ +/* + * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/ + * Written by Jean-Jacques Hiblot <jjhiblot@ti.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <dm.h> +#include <dm/device.h> +#include <generic-phy.h> +#include <asm/io.h> +#include <asm/arch/sys_proto.h> +#include <syscon.h> +#include <regmap.h> + +/* PLLCTRL Registers */ +#define PLL_STATUS 0x00000004 +#define PLL_GO 0x00000008 +#define PLL_CONFIGURATION1 0x0000000C +#define PLL_CONFIGURATION2 0x00000010 +#define PLL_CONFIGURATION3 0x00000014 +#define PLL_CONFIGURATION4 0x00000020 + +#define PLL_REGM_MASK 0x001FFE00 +#define PLL_REGM_SHIFT 9 +#define PLL_REGM_F_MASK 0x0003FFFF +#define PLL_REGM_F_SHIFT 0 +#define PLL_REGN_MASK 0x000001FE +#define PLL_REGN_SHIFT 1 +#define PLL_SELFREQDCO_MASK 0x0000000E +#define PLL_SELFREQDCO_SHIFT 1 +#define PLL_SD_MASK 0x0003FC00 +#define PLL_SD_SHIFT 10 +#define SET_PLL_GO 0x1 +#define PLL_TICOPWDN BIT(16) +#define PLL_LDOPWDN BIT(15) +#define PLL_LOCK 0x2 +#define PLL_IDLE 0x1 + +/* Software rest for the SATA PLL (in CTRL_CORE_SMA_SW_0 register)*/ +#define SATA_PLL_SOFT_RESET (1<<18) + +/* PHY POWER CONTROL Register */ +#define OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_MASK 0x003FC000 +#define OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT 0xE + +#define OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_MASK 0xFFC00000 +#define OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_SHIFT 0x16 + +#define OMAP_CTRL_PIPE3_PHY_TX_RX_POWERON 0x3 +#define OMAP_CTRL_PIPE3_PHY_TX_RX_POWEROFF 0x0 + + +#define PLL_IDLE_TIME 100 /* in milliseconds */ +#define PLL_LOCK_TIME 100 /* in milliseconds */ + +struct omap_pipe3 { + void __iomem *pll_ctrl_base; + void __iomem *power_reg; + void __iomem *pll_reset_reg; + struct pipe3_dpll_map *dpll_map; +}; + + +struct pipe3_dpll_params { + u16 m; + u8 n; + u8 freq:3; + u8 sd; + u32 mf; +}; + +struct pipe3_dpll_map { + unsigned long rate; + struct pipe3_dpll_params params; +}; + +static inline u32 omap_pipe3_readl(void __iomem *addr, unsigned offset) +{ + return readl(addr + offset); +} + +static inline void omap_pipe3_writel(void __iomem *addr, unsigned offset, + u32 data) +{ + writel(data, addr + offset); +} + +static struct pipe3_dpll_params *omap_pipe3_get_dpll_params(struct omap_pipe3 + *pipe3) +{ + u32 rate; + struct pipe3_dpll_map *dpll_map = pipe3->dpll_map; + + rate = get_sys_clk_freq(); + + for (; dpll_map->rate; dpll_map++) { + if (rate == dpll_map->rate) + return &dpll_map->params; + } + + printf("%s: No DPLL configuration for %u Hz SYS CLK\n", + __func__, rate); + return NULL; +} + +static int omap_pipe3_wait_lock(struct omap_pipe3 *pipe3) +{ + u32 val; + int timeout = PLL_LOCK_TIME; + + do { + mdelay(1); + val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_STATUS); + if (val & PLL_LOCK) + break; + } while (--timeout); + + if (!(val & PLL_LOCK)) { + printf("%s: DPLL failed to lock\n", __func__); + return -EBUSY; + } + + return 0; +} + +static int omap_pipe3_dpll_program(struct omap_pipe3 *pipe3) +{ + u32 val; + struct pipe3_dpll_params *dpll_params; + + dpll_params = omap_pipe3_get_dpll_params(pipe3); + if (!dpll_params) { + printf("%s: Invalid DPLL parameters\n", __func__); + return -EINVAL; + } + + val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_CONFIGURATION1); + val &= ~PLL_REGN_MASK; + val |= dpll_params->n << PLL_REGN_SHIFT; + omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_CONFIGURATION1, val); + + val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_CONFIGURATION2); + val &= ~PLL_SELFREQDCO_MASK; + val |= dpll_params->freq << PLL_SELFREQDCO_SHIFT; + omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_CONFIGURATION2, val); + + val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_CONFIGURATION1); + val &= ~PLL_REGM_MASK; + val |= dpll_params->m << PLL_REGM_SHIFT; + omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_CONFIGURATION1, val); + + val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_CONFIGURATION4); + val &= ~PLL_REGM_F_MASK; + val |= dpll_params->mf << PLL_REGM_F_SHIFT; + omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_CONFIGURATION4, val); + + val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_CONFIGURATION3); + val &= ~PLL_SD_MASK; + val |= dpll_params->sd << PLL_SD_SHIFT; + omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_CONFIGURATION3, val); + + omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_GO, SET_PLL_GO); + + return omap_pipe3_wait_lock(pipe3); +} + +static void omap_control_pipe3_power(struct omap_pipe3 *pipe3, int on) +{ + u32 val, rate; + + val = readl(pipe3->power_reg); + + rate = get_sys_clk_freq(); + rate = rate/1000000; + + if (on) { + val &= ~(OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_MASK | + OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_MASK); + val |= OMAP_CTRL_PIPE3_PHY_TX_RX_POWERON << + OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT; + val |= rate << + OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_SHIFT; + } else { + val &= ~OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_MASK; + val |= OMAP_CTRL_PIPE3_PHY_TX_RX_POWEROFF << + OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT; + } + + writel(val, pipe3->power_reg); +} + +static int pipe3_init(struct phy *phy) +{ + int ret; + u32 val; + struct omap_pipe3 *pipe3 = dev_get_priv(phy->dev); + + /* Program the DPLL only if not locked */ + val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_STATUS); + if (!(val & PLL_LOCK)) { + ret = omap_pipe3_dpll_program(pipe3); + if (ret) + return ret; + } else { + /* else just bring it out of IDLE mode */ + val = omap_pipe3_readl(pipe3->pll_ctrl_base, + PLL_CONFIGURATION2); + if (val & PLL_IDLE) { + val &= ~PLL_IDLE; + omap_pipe3_writel(pipe3->pll_ctrl_base, + PLL_CONFIGURATION2, val); + ret = omap_pipe3_wait_lock(pipe3); + if (ret) + return ret; + } + } + return 0; +} + +static int pipe3_power_on(struct phy *phy) +{ + struct omap_pipe3 *pipe3 = dev_get_priv(phy->dev); + + /* Power up the PHY */ + omap_control_pipe3_power(pipe3, 1); + + return 0; +} + +static int pipe3_power_off(struct phy *phy) +{ + struct omap_pipe3 *pipe3 = dev_get_priv(phy->dev); + + /* Power down the PHY */ + omap_control_pipe3_power(pipe3, 0); + + return 0; +} + +static int pipe3_exit(struct phy *phy) +{ + u32 val; + int timeout = PLL_IDLE_TIME; + struct omap_pipe3 *pipe3 = dev_get_priv(phy->dev); + + pipe3_power_off(phy); + + /* Put DPLL in IDLE mode */ + val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_CONFIGURATION2); + val |= PLL_IDLE; + omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_CONFIGURATION2, val); + + /* wait for LDO and Oscillator to power down */ + do { + mdelay(1); + val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_STATUS); + if ((val & PLL_TICOPWDN) && (val & PLL_LDOPWDN)) + break; + } while (--timeout); + + if (!(val & PLL_TICOPWDN) || !(val & PLL_LDOPWDN)) { + error("%s: Failed to power down DPLL: PLL_STATUS 0x%x\n", + __func__, val); + return -EBUSY; + } + + val = readl(pipe3->pll_reset_reg); + writel(val | SATA_PLL_SOFT_RESET, pipe3->pll_reset_reg); + mdelay(1); + writel(val & ~SATA_PLL_SOFT_RESET, pipe3->pll_reset_reg); + return 0; +} + +static void *get_reg(struct udevice *dev, const char *name) +{ + struct udevice *syscon; + struct regmap *regmap; + const fdt32_t *cell; + int len, err; + void *base; + + err = uclass_get_device_by_phandle(UCLASS_SYSCON, dev, + name, &syscon); + if (err) { + error("unable to find syscon device for %s (%d)\n", + name, err); + return NULL; + } + + regmap = syscon_get_regmap(syscon); + if (IS_ERR(regmap)) { + error("unable to find regmap for %s (%ld)\n", + name, PTR_ERR(regmap)); + return NULL; + } + + cell = fdt_getprop(gd->fdt_blob, dev->of_offset, name, + &len); + if (len < 2*sizeof(fdt32_t)) { + error("offset not available for %s\n", name); + return NULL; + } + + base = regmap_get_range(regmap, 0); + if (!base) + return NULL; + + return fdtdec_get_number(cell + 1, 1) + base; +} + +static int pipe3_phy_probe(struct udevice *dev) +{ + fdt_addr_t addr; + fdt_size_t sz; + struct omap_pipe3 *pipe3 = dev_get_priv(dev); + + addr = dev_get_addr_size_index(dev, 2, &sz); + if (addr == FDT_ADDR_T_NONE) { + error("missing pll ctrl address\n"); + return -EINVAL; + } + + pipe3->pll_ctrl_base = map_physmem(addr, sz, MAP_NOCACHE); + if (!pipe3->pll_ctrl_base) { + error("unable to remap pll ctrl\n"); + return -EINVAL; + } + + pipe3->power_reg = get_reg(dev, "syscon-phy-power"); + if (!pipe3->power_reg) + return -EINVAL; + + pipe3->pll_reset_reg = get_reg(dev, "syscon-pllreset"); + if (!pipe3->pll_reset_reg) + return -EINVAL; + + pipe3->dpll_map = (struct pipe3_dpll_map *)dev_get_driver_data(dev); + + return 0; +} + +static struct pipe3_dpll_map dpll_map_sata[] = { + {12000000, {1000, 7, 4, 6, 0} }, /* 12 MHz */ + {16800000, {714, 7, 4, 6, 0} }, /* 16.8 MHz */ + {19200000, {625, 7, 4, 6, 0} }, /* 19.2 MHz */ + {20000000, {600, 7, 4, 6, 0} }, /* 20 MHz */ + {26000000, {461, 7, 4, 6, 0} }, /* 26 MHz */ + {38400000, {312, 7, 4, 6, 0} }, /* 38.4 MHz */ + { }, /* Terminator */ +}; + +static const struct udevice_id pipe3_phy_ids[] = { + { .compatible = "ti,phy-pipe3-sata", .data = (ulong)&dpll_map_sata }, + { } +}; + +static struct phy_ops pipe3_phy_ops = { + .init = pipe3_init, + .power_on = pipe3_power_on, + .power_off = pipe3_power_off, + .exit = pipe3_exit, +}; + +U_BOOT_DRIVER(pipe3_phy) = { + .name = "pipe3_phy", + .id = UCLASS_PHY, + .of_match = pipe3_phy_ids, + .ops = &pipe3_phy_ops, + .probe = pipe3_phy_probe, + .priv_auto_alloc_size = sizeof(struct omap_pipe3), +}; |