diff options
Diffstat (limited to 'drivers/phy')
| -rw-r--r-- | drivers/phy/Kconfig | 14 | ||||
| -rw-r--r-- | drivers/phy/Makefile | 4 | ||||
| -rw-r--r-- | drivers/phy/phy-armada375-usb2.c | 4 | ||||
| -rw-r--r-- | drivers/phy/phy-exynos-mipi-video.c | 89 | ||||
| -rw-r--r-- | drivers/phy/phy-miphy28lp.c | 61 | ||||
| -rw-r--r-- | drivers/phy/phy-miphy365x.c | 29 | ||||
| -rw-r--r-- | drivers/phy/phy-qcom-ufs-i.h | 159 | ||||
| -rw-r--r-- | drivers/phy/phy-qcom-ufs-qmp-14nm.c | 201 | ||||
| -rw-r--r-- | drivers/phy/phy-qcom-ufs-qmp-14nm.h | 177 | ||||
| -rw-r--r-- | drivers/phy/phy-qcom-ufs-qmp-20nm.c | 257 | ||||
| -rw-r--r-- | drivers/phy/phy-qcom-ufs-qmp-20nm.h | 235 | ||||
| -rw-r--r-- | drivers/phy/phy-qcom-ufs.c | 745 | ||||
| -rw-r--r-- | drivers/phy/phy-rockchip-usb.c | 158 | ||||
| -rw-r--r-- | drivers/phy/phy-stih407-usb.c | 25 | ||||
| -rw-r--r-- | drivers/phy/phy-ti-pipe3.c | 143 |
15 files changed, 2177 insertions, 124 deletions
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index ccad8809ecb1..2962de205ba7 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -239,6 +239,13 @@ config PHY_QCOM_IPQ806X_SATA depends on OF select GENERIC_PHY +config PHY_ROCKCHIP_USB + tristate "Rockchip USB2 PHY Driver" + depends on ARCH_ROCKCHIP && OF + select GENERIC_PHY + help + Enable this to support the Rockchip USB 2.0 PHY. + config PHY_ST_SPEAR1310_MIPHY tristate "ST SPEAR1310-MIPHY driver" select GENERIC_PHY @@ -277,4 +284,11 @@ config PHY_STIH41X_USB Enable this to support the USB transceiver that is part of STMicroelectronics STiH41x SoC series. +config PHY_QCOM_UFS + tristate "Qualcomm UFS PHY driver" + depends on OF && ARCH_MSM + select GENERIC_PHY + help + Support for UFS PHY on QCOM chipsets. + endmenu diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index aa74f961e44e..f080e1bb2a74 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -28,9 +28,13 @@ phy-exynos-usb2-$(CONFIG_PHY_EXYNOS5250_USB2) += phy-exynos5250-usb2.o phy-exynos-usb2-$(CONFIG_PHY_S5PV210_USB2) += phy-s5pv210-usb2.o obj-$(CONFIG_PHY_EXYNOS5_USBDRD) += phy-exynos5-usbdrd.o obj-$(CONFIG_PHY_QCOM_APQ8064_SATA) += phy-qcom-apq8064-sata.o +obj-$(CONFIG_PHY_ROCKCHIP_USB) += phy-rockchip-usb.o obj-$(CONFIG_PHY_QCOM_IPQ806X_SATA) += phy-qcom-ipq806x-sata.o obj-$(CONFIG_PHY_ST_SPEAR1310_MIPHY) += phy-spear1310-miphy.o obj-$(CONFIG_PHY_ST_SPEAR1340_MIPHY) += phy-spear1340-miphy.o obj-$(CONFIG_PHY_XGENE) += phy-xgene.o obj-$(CONFIG_PHY_STIH407_USB) += phy-stih407-usb.o obj-$(CONFIG_PHY_STIH41X_USB) += phy-stih41x-usb.o +obj-$(CONFIG_PHY_QCOM_UFS) += phy-qcom-ufs.o +obj-$(CONFIG_PHY_QCOM_UFS) += phy-qcom-ufs-qmp-20nm.o +obj-$(CONFIG_PHY_QCOM_UFS) += phy-qcom-ufs-qmp-14nm.o diff --git a/drivers/phy/phy-armada375-usb2.c b/drivers/phy/phy-armada375-usb2.c index ac7d99d01cb3..7c99ca256f05 100644 --- a/drivers/phy/phy-armada375-usb2.c +++ b/drivers/phy/phy-armada375-usb2.c @@ -118,8 +118,8 @@ static int armada375_usb_phy_probe(struct platform_device *pdev) res = platform_get_resource(pdev, IORESOURCE_MEM, 0); usb_cluster_base = devm_ioremap_resource(&pdev->dev, res); - if (!usb_cluster_base) - return -ENOMEM; + if (IS_ERR(usb_cluster_base)) + return PTR_ERR(usb_cluster_base); phy = devm_phy_create(dev, NULL, &armada375_usb_phy_ops); if (IS_ERR(phy)) { diff --git a/drivers/phy/phy-exynos-mipi-video.c b/drivers/phy/phy-exynos-mipi-video.c index 943e0f88a120..f017b2f2a54e 100644 --- a/drivers/phy/phy-exynos-mipi-video.c +++ b/drivers/phy/phy-exynos-mipi-video.c @@ -12,19 +12,18 @@ #include <linux/err.h> #include <linux/io.h> #include <linux/kernel.h> +#include <linux/mfd/syscon/exynos4-pmu.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_address.h> #include <linux/phy/phy.h> #include <linux/platform_device.h> +#include <linux/regmap.h> #include <linux/spinlock.h> +#include <linux/mfd/syscon.h> -/* MIPI_PHYn_CONTROL register offset: n = 0..1 */ +/* MIPI_PHYn_CONTROL reg. offset (for base address from ioremap): n = 0..1 */ #define EXYNOS_MIPI_PHY_CONTROL(n) ((n) * 4) -#define EXYNOS_MIPI_PHY_ENABLE (1 << 0) -#define EXYNOS_MIPI_PHY_SRESETN (1 << 1) -#define EXYNOS_MIPI_PHY_MRESETN (1 << 2) -#define EXYNOS_MIPI_PHY_RESET_MASK (3 << 1) enum exynos_mipi_phy_id { EXYNOS_MIPI_PHY_ID_CSIS0, @@ -38,43 +37,62 @@ enum exynos_mipi_phy_id { ((id) == EXYNOS_MIPI_PHY_ID_DSIM0 || (id) == EXYNOS_MIPI_PHY_ID_DSIM1) struct exynos_mipi_video_phy { - spinlock_t slock; struct video_phy_desc { struct phy *phy; unsigned int index; } phys[EXYNOS_MIPI_PHYS_NUM]; + spinlock_t slock; void __iomem *regs; + struct mutex mutex; + struct regmap *regmap; }; static int __set_phy_state(struct exynos_mipi_video_phy *state, enum exynos_mipi_phy_id id, unsigned int on) { + const unsigned int offset = EXYNOS4_MIPI_PHY_CONTROL(id / 2); void __iomem *addr; - u32 reg, reset; - - addr = state->regs + EXYNOS_MIPI_PHY_CONTROL(id / 2); + u32 val, reset; if (is_mipi_dsim_phy_id(id)) - reset = EXYNOS_MIPI_PHY_MRESETN; - else - reset = EXYNOS_MIPI_PHY_SRESETN; - - spin_lock(&state->slock); - reg = readl(addr); - if (on) - reg |= reset; + reset = EXYNOS4_MIPI_PHY_MRESETN; else - reg &= ~reset; - writel(reg, addr); - - /* Clear ENABLE bit only if MRESETN, SRESETN bits are not set. */ - if (on) - reg |= EXYNOS_MIPI_PHY_ENABLE; - else if (!(reg & EXYNOS_MIPI_PHY_RESET_MASK)) - reg &= ~EXYNOS_MIPI_PHY_ENABLE; + reset = EXYNOS4_MIPI_PHY_SRESETN; + + if (state->regmap) { + mutex_lock(&state->mutex); + regmap_read(state->regmap, offset, &val); + if (on) + val |= reset; + else + val &= ~reset; + regmap_write(state->regmap, offset, val); + if (on) + val |= EXYNOS4_MIPI_PHY_ENABLE; + else if (!(val & EXYNOS4_MIPI_PHY_RESET_MASK)) + val &= ~EXYNOS4_MIPI_PHY_ENABLE; + regmap_write(state->regmap, offset, val); + mutex_unlock(&state->mutex); + } else { + addr = state->regs + EXYNOS_MIPI_PHY_CONTROL(id / 2); + + spin_lock(&state->slock); + val = readl(addr); + if (on) + val |= reset; + else + val &= ~reset; + writel(val, addr); + /* Clear ENABLE bit only if MRESETN, SRESETN bits are not set */ + if (on) + val |= EXYNOS4_MIPI_PHY_ENABLE; + else if (!(val & EXYNOS4_MIPI_PHY_RESET_MASK)) + val &= ~EXYNOS4_MIPI_PHY_ENABLE; + + writel(val, addr); + spin_unlock(&state->slock); + } - writel(reg, addr); - spin_unlock(&state->slock); return 0; } @@ -118,7 +136,6 @@ static int exynos_mipi_video_phy_probe(struct platform_device *pdev) { struct exynos_mipi_video_phy *state; struct device *dev = &pdev->dev; - struct resource *res; struct phy_provider *phy_provider; unsigned int i; @@ -126,14 +143,22 @@ static int exynos_mipi_video_phy_probe(struct platform_device *pdev) if (!state) return -ENOMEM; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + state->regmap = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon"); + if (IS_ERR(state->regmap)) { + struct resource *res; - state->regs = devm_ioremap_resource(dev, res); - if (IS_ERR(state->regs)) - return PTR_ERR(state->regs); + dev_info(dev, "regmap lookup failed: %ld\n", + PTR_ERR(state->regmap)); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + state->regs = devm_ioremap_resource(dev, res); + if (IS_ERR(state->regs)) + return PTR_ERR(state->regs); + } dev_set_drvdata(dev, state); spin_lock_init(&state->slock); + mutex_init(&state->mutex); for (i = 0; i < EXYNOS_MIPI_PHYS_NUM; i++) { struct phy *phy = devm_phy_create(dev, NULL, diff --git a/drivers/phy/phy-miphy28lp.c b/drivers/phy/phy-miphy28lp.c index 27fa62ce6136..9b2848e6115d 100644 --- a/drivers/phy/phy-miphy28lp.c +++ b/drivers/phy/phy-miphy28lp.c @@ -194,6 +194,14 @@ #define MIPHY_SATA_BANK_NB 3 #define MIPHY_PCIE_BANK_NB 2 +enum { + SYSCFG_CTRL, + SYSCFG_STATUS, + SYSCFG_PCI, + SYSCFG_SATA, + SYSCFG_REG_MAX, +}; + struct miphy28lp_phy { struct phy *phy; struct miphy28lp_dev *phydev; @@ -211,10 +219,7 @@ struct miphy28lp_phy { 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; + u32 syscfg_reg[SYSCFG_REG_MAX]; u8 type; }; @@ -834,12 +839,12 @@ static int miphy_osc_is_ready(struct miphy28lp_phy *miphy_phy) if (!miphy_phy->osc_rdy) return 0; - if (!miphy_phy->syscfg_miphy_status) + if (!miphy_phy->syscfg_reg[SYSCFG_STATUS]) return -EINVAL; do { - regmap_read(miphy_dev->regmap, miphy_phy->syscfg_miphy_status, - &val); + regmap_read(miphy_dev->regmap, + miphy_phy->syscfg_reg[SYSCFG_STATUS], &val); if ((val & MIPHY_OSC_RDY) != MIPHY_OSC_RDY) cpu_relax(); @@ -888,7 +893,7 @@ static int miphy28lp_setup(struct miphy28lp_phy *miphy_phy, u32 miphy_val) int err; struct miphy28lp_dev *miphy_dev = miphy_phy->phydev; - if (!miphy_phy->syscfg_miphy_ctrl) + if (!miphy_phy->syscfg_reg[SYSCFG_CTRL]) return -EINVAL; err = reset_control_assert(miphy_phy->miphy_rst); @@ -900,7 +905,8 @@ static int miphy28lp_setup(struct miphy28lp_phy *miphy_phy, u32 miphy_val) if (miphy_phy->osc_force_ext) miphy_val |= MIPHY_OSC_FORCE_EXT; - regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_miphy_ctrl, + regmap_update_bits(miphy_dev->regmap, + miphy_phy->syscfg_reg[SYSCFG_CTRL], MIPHY_CTRL_MASK, miphy_val); err = reset_control_deassert(miphy_phy->miphy_rst); @@ -917,8 +923,9 @@ static int miphy28lp_init_sata(struct miphy28lp_phy *miphy_phy) struct miphy28lp_dev *miphy_dev = miphy_phy->phydev; int err, sata_conf = SATA_CTRL_SELECT_SATA; - if ((!miphy_phy->syscfg_sata) || (!miphy_phy->syscfg_pci) - || (!miphy_phy->base)) + if ((!miphy_phy->syscfg_reg[SYSCFG_SATA]) || + (!miphy_phy->syscfg_reg[SYSCFG_PCI]) || + (!miphy_phy->base)) return -EINVAL; dev_info(miphy_dev->dev, "sata-up mode, addr 0x%p\n", miphy_phy->base); @@ -926,10 +933,11 @@ static int miphy28lp_init_sata(struct miphy28lp_phy *miphy_phy) /* Configure the glue-logic */ sata_conf |= ((miphy_phy->sata_gen - SATA_GEN1) << SATA_SPDMODE); - regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_sata, + regmap_update_bits(miphy_dev->regmap, + miphy_phy->syscfg_reg[SYSCFG_SATA], SATA_CTRL_MASK, sata_conf); - regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_pci, + regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_reg[SYSCFG_PCI], PCIE_CTRL_MASK, SATA_CTRL_SELECT_PCIE); /* MiPHY path and clocking init */ @@ -951,17 +959,19 @@ static int miphy28lp_init_pcie(struct miphy28lp_phy *miphy_phy) struct miphy28lp_dev *miphy_dev = miphy_phy->phydev; int err; - if ((!miphy_phy->syscfg_sata) || (!miphy_phy->syscfg_pci) + if ((!miphy_phy->syscfg_reg[SYSCFG_SATA]) || + (!miphy_phy->syscfg_reg[SYSCFG_PCI]) || (!miphy_phy->base) || (!miphy_phy->pipebase)) return -EINVAL; dev_info(miphy_dev->dev, "pcie-up mode, addr 0x%p\n", miphy_phy->base); /* Configure the glue-logic */ - regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_sata, + regmap_update_bits(miphy_dev->regmap, + miphy_phy->syscfg_reg[SYSCFG_SATA], SATA_CTRL_MASK, SATA_CTRL_SELECT_PCIE); - regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_pci, + regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_reg[SYSCFG_PCI], PCIE_CTRL_MASK, SYSCFG_PCIE_PCIE_VAL); /* MiPHY path and clocking init */ @@ -1156,7 +1166,8 @@ static int miphy28lp_probe_resets(struct device_node *node, static int miphy28lp_of_probe(struct device_node *np, struct miphy28lp_phy *miphy_phy) { - struct resource res; + int i; + u32 ctrlreg; miphy_phy->osc_force_ext = of_property_read_bool(np, "st,osc-force-ext"); @@ -1175,18 +1186,10 @@ static int miphy28lp_of_probe(struct device_node *np, if (!miphy_phy->sata_gen) miphy_phy->sata_gen = SATA_GEN1; - if (!miphy28lp_get_resource_byname(np, "miphy-ctrl-glue", &res)) - miphy_phy->syscfg_miphy_ctrl = res.start; - - if (!miphy28lp_get_resource_byname(np, "miphy-status-glue", &res)) - miphy_phy->syscfg_miphy_status = res.start; - - if (!miphy28lp_get_resource_byname(np, "pcie-glue", &res)) - miphy_phy->syscfg_pci = res.start; - - if (!miphy28lp_get_resource_byname(np, "sata-glue", &res)) - miphy_phy->syscfg_sata = res.start; - + for (i = 0; i < SYSCFG_REG_MAX; i++) { + if (!of_property_read_u32_index(np, "st,syscfg", i, &ctrlreg)) + miphy_phy->syscfg_reg[i] = ctrlreg; + } return 0; } diff --git a/drivers/phy/phy-miphy365x.c b/drivers/phy/phy-miphy365x.c index 6ab43a814ad2..6c80154e8bff 100644 --- a/drivers/phy/phy-miphy365x.c +++ b/drivers/phy/phy-miphy365x.c @@ -141,7 +141,7 @@ struct miphy365x_phy { bool pcie_tx_pol_inv; bool sata_tx_pol_inv; u32 sata_gen; - u64 ctrlreg; + u32 ctrlreg; u8 type; }; @@ -179,7 +179,7 @@ static int miphy365x_set_path(struct miphy365x_phy *miphy_phy, bool sata = (miphy_phy->type == MIPHY_TYPE_SATA); return regmap_update_bits(miphy_dev->regmap, - (unsigned int)miphy_phy->ctrlreg, + miphy_phy->ctrlreg, SYSCFG_SELECT_SATA_MASK, sata << SYSCFG_SELECT_SATA_POS); } @@ -445,7 +445,6 @@ int miphy365x_get_addr(struct device *dev, struct miphy365x_phy *miphy_phy, { struct device_node *phynode = miphy_phy->phy->dev.of_node; const char *name; - const __be32 *taddr; int type = miphy_phy->type; int ret; @@ -455,22 +454,6 @@ int miphy365x_get_addr(struct device *dev, struct miphy365x_phy *miphy_phy, return ret; } - if (!strncmp(name, "syscfg", 6)) { - taddr = of_get_address(phynode, index, NULL, NULL); - if (!taddr) { - dev_err(dev, "failed to fetch syscfg address\n"); - return -EINVAL; - } - - miphy_phy->ctrlreg = of_translate_address(phynode, taddr); - if (miphy_phy->ctrlreg == OF_BAD_ADDR) { - dev_err(dev, "failed to translate syscfg address\n"); - return -EINVAL; - } - - return 0; - } - if (!((!strncmp(name, "sata", 4) && type == MIPHY_TYPE_SATA) || (!strncmp(name, "pcie", 4) && type == MIPHY_TYPE_PCIE))) return 0; @@ -606,7 +589,15 @@ static int miphy365x_probe(struct platform_device *pdev) return ret; phy_set_drvdata(phy, miphy_dev->phys[port]); + port++; + /* sysconfig offsets are indexed from 1 */ + ret = of_property_read_u32_index(np, "st,syscfg", port, + &miphy_phy->ctrlreg); + if (ret) { + dev_err(&pdev->dev, "No sysconfig offset found\n"); + return ret; + } } provider = devm_of_phy_provider_register(&pdev->dev, miphy365x_xlate); diff --git a/drivers/phy/phy-qcom-ufs-i.h b/drivers/phy/phy-qcom-ufs-i.h new file mode 100644 index 000000000000..591a39175e8a --- /dev/null +++ b/drivers/phy/phy-qcom-ufs-i.h @@ -0,0 +1,159 @@ +/* + * Copyright (c) 2013-2015, Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * 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. + * + */ + +#ifndef UFS_QCOM_PHY_I_H_ +#define UFS_QCOM_PHY_I_H_ + +#include <linux/module.h> +#include <linux/clk.h> +#include <linux/regulator/consumer.h> +#include <linux/slab.h> +#include <linux/phy/phy-qcom-ufs.h> +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/delay.h> + +#define readl_poll_timeout(addr, val, cond, sleep_us, timeout_us) \ +({ \ + ktime_t timeout = ktime_add_us(ktime_get(), timeout_us); \ + might_sleep_if(timeout_us); \ + for (;;) { \ + (val) = readl(addr); \ + if (cond) \ + break; \ + if (timeout_us && ktime_compare(ktime_get(), timeout) > 0) { \ + (val) = readl(addr); \ + break; \ + } \ + if (sleep_us) \ + usleep_range(DIV_ROUND_UP(sleep_us, 4), sleep_us); \ + } \ + (cond) ? 0 : -ETIMEDOUT; \ +}) + +#define UFS_QCOM_PHY_CAL_ENTRY(reg, val) \ + { \ + .reg_offset = reg, \ + .cfg_value = val, \ + } + +#define UFS_QCOM_PHY_NAME_LEN 30 + +enum { + MASK_SERDES_START = 0x1, + MASK_PCS_READY = 0x1, +}; + +enum { + OFFSET_SERDES_START = 0x0, +}; + +struct ufs_qcom_phy_stored_attributes { + u32 att; + u32 value; +}; + + +struct ufs_qcom_phy_calibration { + u32 reg_offset; + u32 cfg_value; +}; + +struct ufs_qcom_phy_vreg { + const char *name; + struct regulator *reg; + int max_uA; + int min_uV; + int max_uV; + bool enabled; + bool is_always_on; +}; + +struct ufs_qcom_phy { + struct list_head list; + struct device *dev; + void __iomem *mmio; + void __iomem *dev_ref_clk_ctrl_mmio; + struct clk *tx_iface_clk; + struct clk *rx_iface_clk; + bool is_iface_clk_enabled; + struct clk *ref_clk_src; + struct clk *ref_clk_parent; + struct clk *ref_clk; + bool is_ref_clk_enabled; + bool is_dev_ref_clk_enabled; + struct ufs_qcom_phy_vreg vdda_pll; + struct ufs_qcom_phy_vreg vdda_phy; + struct ufs_qcom_phy_vreg vddp_ref_clk; + unsigned int quirks; + + /* + * If UFS link is put into Hibern8 and if UFS PHY analog hardware is + * power collapsed (by clearing UFS_PHY_POWER_DOWN_CONTROL), Hibern8 + * exit might fail even after powering on UFS PHY analog hardware. + * Enabling this quirk will help to solve above issue by doing + * custom PHY settings just before PHY analog power collapse. + */ + #define UFS_QCOM_PHY_QUIRK_HIBERN8_EXIT_AFTER_PHY_PWR_COLLAPSE BIT(0) + + u8 host_ctrl_rev_major; + u16 host_ctrl_rev_minor; + u16 host_ctrl_rev_step; + + char name[UFS_QCOM_PHY_NAME_LEN]; + struct ufs_qcom_phy_calibration *cached_regs; + int cached_regs_table_size; + bool is_powered_on; + struct ufs_qcom_phy_specific_ops *phy_spec_ops; +}; + +/** + * struct ufs_qcom_phy_specific_ops - set of pointers to functions which have a + * specific implementation per phy. Each UFS phy, should implement + * those functions according to its spec and requirements + * @calibrate_phy: pointer to a function that calibrate the phy + * @start_serdes: pointer to a function that starts the serdes + * @is_physical_coding_sublayer_ready: pointer to a function that + * checks pcs readiness. returns 0 for success and non-zero for error. + * @set_tx_lane_enable: pointer to a function that enable tx lanes + * @power_control: pointer to a function that controls analog rail of phy + * and writes to QSERDES_RX_SIGDET_CNTRL attribute + */ +struct ufs_qcom_phy_specific_ops { + int (*calibrate_phy)(struct ufs_qcom_phy *phy, bool is_rate_B); + void (*start_serdes)(struct ufs_qcom_phy *phy); + int (*is_physical_coding_sublayer_ready)(struct ufs_qcom_phy *phy); + void (*set_tx_lane_enable)(struct ufs_qcom_phy *phy, u32 val); + void (*power_control)(struct ufs_qcom_phy *phy, bool val); +}; + +struct ufs_qcom_phy *get_ufs_qcom_phy(struct phy *generic_phy); +int ufs_qcom_phy_power_on(struct phy *generic_phy); +int ufs_qcom_phy_power_off(struct phy *generic_phy); +int ufs_qcom_phy_exit(struct phy *generic_phy); +int ufs_qcom_phy_init_clks(struct phy *generic_phy, + struct ufs_qcom_phy *phy_common); +int ufs_qcom_phy_init_vregulators(struct phy *generic_phy, + struct ufs_qcom_phy *phy_common); +int ufs_qcom_phy_remove(struct phy *generic_phy, + struct ufs_qcom_phy *ufs_qcom_phy); +struct phy *ufs_qcom_phy_generic_probe(struct platform_device *pdev, + struct ufs_qcom_phy *common_cfg, + struct phy_ops *ufs_qcom_phy_gen_ops, + struct ufs_qcom_phy_specific_ops *phy_spec_ops); +int ufs_qcom_phy_calibrate(struct ufs_qcom_phy *ufs_qcom_phy, + struct ufs_qcom_phy_calibration *tbl_A, int tbl_size_A, + struct ufs_qcom_phy_calibration *tbl_B, int tbl_size_B, + bool is_rate_B); +#endif diff --git a/drivers/phy/phy-qcom-ufs-qmp-14nm.c b/drivers/phy/phy-qcom-ufs-qmp-14nm.c new file mode 100644 index 000000000000..f5fc50a9fce7 --- /dev/null +++ b/drivers/phy/phy-qcom-ufs-qmp-14nm.c @@ -0,0 +1,201 @@ +/* + * Copyright (c) 2013-2015, Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * 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 "phy-qcom-ufs-qmp-14nm.h" + +#define UFS_PHY_NAME "ufs_phy_qmp_14nm" +#define UFS_PHY_VDDA_PHY_UV (925000) + +static +int ufs_qcom_phy_qmp_14nm_phy_calibrate(struct ufs_qcom_phy *ufs_qcom_phy, + bool is_rate_B) +{ + int tbl_size_A = ARRAY_SIZE(phy_cal_table_rate_A); + int tbl_size_B = ARRAY_SIZE(phy_cal_table_rate_B); + int err; + + err = ufs_qcom_phy_calibrate(ufs_qcom_phy, phy_cal_table_rate_A, + tbl_size_A, phy_cal_table_rate_B, tbl_size_B, is_rate_B); + + if (err) + dev_err(ufs_qcom_phy->dev, + "%s: ufs_qcom_phy_calibrate() failed %d\n", + __func__, err); + return err; +} + +static +void ufs_qcom_phy_qmp_14nm_advertise_quirks(struct ufs_qcom_phy *phy_common) +{ + phy_common->quirks = + UFS_QCOM_PHY_QUIRK_HIBERN8_EXIT_AFTER_PHY_PWR_COLLAPSE; +} + +static int ufs_qcom_phy_qmp_14nm_init(struct phy *generic_phy) +{ + struct ufs_qcom_phy_qmp_14nm *phy = phy_get_drvdata(generic_phy); + struct ufs_qcom_phy *phy_common = &phy->common_cfg; + int err; + + err = ufs_qcom_phy_init_clks(generic_phy, phy_common); + if (err) { + dev_err(phy_common->dev, "%s: ufs_qcom_phy_init_clks() failed %d\n", + __func__, err); + goto out; + } + + err = ufs_qcom_phy_init_vregulators(generic_phy, phy_common); + if (err) { + dev_err(phy_common->dev, "%s: ufs_qcom_phy_init_vregulators() failed %d\n", + __func__, err); + goto out; + } + phy_common->vdda_phy.max_uV = UFS_PHY_VDDA_PHY_UV; + phy_common->vdda_phy.min_uV = UFS_PHY_VDDA_PHY_UV; + + ufs_qcom_phy_qmp_14nm_advertise_quirks(phy_common); + +out: + return err; +} + +static +void ufs_qcom_phy_qmp_14nm_power_control(struct ufs_qcom_phy *phy, bool val) +{ + writel_relaxed(val ? 0x1 : 0x0, phy->mmio + UFS_PHY_POWER_DOWN_CONTROL); + /* + * Before any transactions involving PHY, ensure PHY knows + * that it's analog rail is powered ON (or OFF). + */ + mb(); +} + +static inline +void ufs_qcom_phy_qmp_14nm_set_tx_lane_enable(struct ufs_qcom_phy *phy, u32 val) +{ + /* + * 14nm PHY does not have TX_LANE_ENABLE register. + * Implement this function so as not to propagate error to caller. + */ +} + +static inline void ufs_qcom_phy_qmp_14nm_start_serdes(struct ufs_qcom_phy *phy) +{ + u32 tmp; + + tmp = readl_relaxed(phy->mmio + UFS_PHY_PHY_START); + tmp &= ~MASK_SERDES_START; + tmp |= (1 << OFFSET_SERDES_START); + writel_relaxed(tmp, phy->mmio + UFS_PHY_PHY_START); + /* Ensure register value is committed */ + mb(); +} + +static int ufs_qcom_phy_qmp_14nm_is_pcs_ready(struct ufs_qcom_phy *phy_common) +{ + int err = 0; + u32 val; + + err = readl_poll_timeout(phy_common->mmio + UFS_PHY_PCS_READY_STATUS, + val, (val & MASK_PCS_READY), 10, 1000000); + if (err) + dev_err(phy_common->dev, "%s: poll for pcs failed err = %d\n", + __func__, err); + return err; +} + +static struct phy_ops ufs_qcom_phy_qmp_14nm_phy_ops = { + .init = ufs_qcom_phy_qmp_14nm_init, + .exit = ufs_qcom_phy_exit, + .power_on = ufs_qcom_phy_power_on, + .power_off = ufs_qcom_phy_power_off, + .owner = THIS_MODULE, +}; + +static struct ufs_qcom_phy_specific_ops phy_14nm_ops = { + .calibrate_phy = ufs_qcom_phy_qmp_14nm_phy_calibrate, + .start_serdes = ufs_qcom_phy_qmp_14nm_start_serdes, + .is_physical_coding_sublayer_ready = ufs_qcom_phy_qmp_14nm_is_pcs_ready, + .set_tx_lane_enable = ufs_qcom_phy_qmp_14nm_set_tx_lane_enable, + .power_control = ufs_qcom_phy_qmp_14nm_power_control, +}; + +static int ufs_qcom_phy_qmp_14nm_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct phy *generic_phy; + struct ufs_qcom_phy_qmp_14nm *phy; + int err = 0; + + phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL); + if (!phy) { + dev_err(dev, "%s: failed to allocate phy\n", __func__); + err = -ENOMEM; + goto out; + } + + generic_phy = ufs_qcom_phy_generic_probe(pdev, &phy->common_cfg, + &ufs_qcom_phy_qmp_14nm_phy_ops, &phy_14nm_ops); + + if (!generic_phy) { + dev_err(dev, "%s: ufs_qcom_phy_generic_probe() failed\n", + __func__); + err = -EIO; + goto out; + } + + phy_set_drvdata(generic_phy, phy); + + strlcpy(phy->common_cfg.name, UFS_PHY_NAME, + sizeof(phy->common_cfg.name)); + +out: + return err; +} + +static int ufs_qcom_phy_qmp_14nm_remove(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct phy *generic_phy = to_phy(dev); + struct ufs_qcom_phy *ufs_qcom_phy = get_ufs_qcom_phy(generic_phy); + int err = 0; + + err = ufs_qcom_phy_remove(generic_phy, ufs_qcom_phy); + if (err) + dev_err(dev, "%s: ufs_qcom_phy_remove failed = %d\n", + __func__, err); + + return err; +} + +static const struct of_device_id ufs_qcom_phy_qmp_14nm_of_match[] = { + {.compatible = "qcom,ufs-phy-qmp-14nm"}, + {}, +}; +MODULE_DEVICE_TABLE(of, ufs_qcom_phy_qmp_14nm_of_match); + +static struct platform_driver ufs_qcom_phy_qmp_14nm_driver = { + .probe = ufs_qcom_phy_qmp_14nm_probe, + .remove = ufs_qcom_phy_qmp_14nm_remove, + .driver = { + .of_match_table = ufs_qcom_phy_qmp_14nm_of_match, + .name = "ufs_qcom_phy_qmp_14nm", + .owner = THIS_MODULE, + }, +}; + +module_platform_driver(ufs_qcom_phy_qmp_14nm_driver); + +MODULE_DESCRIPTION("Universal Flash Storage (UFS) QCOM PHY QMP 14nm"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/phy/phy-qcom-ufs-qmp-14nm.h b/drivers/phy/phy-qcom-ufs-qmp-14nm.h new file mode 100644 index 000000000000..3aefdbacbcd0 --- /dev/null +++ b/drivers/phy/phy-qcom-ufs-qmp-14nm.h @@ -0,0 +1,177 @@ +/* + * Copyright (c) 2013-2015, Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * 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. + * + */ + +#ifndef UFS_QCOM_PHY_QMP_14NM_H_ +#define UFS_QCOM_PHY_QMP_14NM_H_ + +#include "phy-qcom-ufs-i.h" + +/* QCOM UFS PHY control registers */ +#define COM_OFF(x) (0x000 + x) +#define PHY_OFF(x) (0xC00 + x) +#define TX_OFF(n, x) (0x400 + (0x400 * n) + x) +#define RX_OFF(n, x) (0x600 + (0x400 * n) + x) + +/* UFS PHY QSERDES COM registers */ +#define QSERDES_COM_BG_TIMER COM_OFF(0x0C) +#define QSERDES_COM_BIAS_EN_CLKBUFLR_EN COM_OFF(0x34) +#define QSERDES_COM_SYS_CLK_CTRL COM_OFF(0x3C) +#define QSERDES_COM_LOCK_CMP1_MODE0 COM_OFF(0x4C) +#define QSERDES_COM_LOCK_CMP2_MODE0 COM_OFF(0x50) +#define QSERDES_COM_LOCK_CMP3_MODE0 COM_OFF(0x54) +#define QSERDES_COM_LOCK_CMP1_MODE1 COM_OFF(0x58) +#define QSERDES_COM_LOCK_CMP2_MODE1 COM_OFF(0x5C) +#define QSERDES_COM_LOCK_CMP3_MODE1 COM_OFF(0x60) +#define QSERDES_COM_CP_CTRL_MODE0 COM_OFF(0x78) +#define QSERDES_COM_CP_CTRL_MODE1 COM_OFF(0x7C) +#define QSERDES_COM_PLL_RCTRL_MODE0 COM_OFF(0x84) +#define QSERDES_COM_PLL_RCTRL_MODE1 COM_OFF(0x88) +#define QSERDES_COM_PLL_CCTRL_MODE0 COM_OFF(0x90) +#define QSERDES_COM_PLL_CCTRL_MODE1 COM_OFF(0x94) +#define QSERDES_COM_SYSCLK_EN_SEL COM_OFF(0xAC) +#define QSERDES_COM_RESETSM_CNTRL COM_OFF(0xB4) +#define QSERDES_COM_LOCK_CMP_EN COM_OFF(0xC8) +#define QSERDES_COM_LOCK_CMP_CFG COM_OFF(0xCC) +#define QSERDES_COM_DEC_START_MODE0 COM_OFF(0xD0) +#define QSERDES_COM_DEC_START_MODE1 COM_OFF(0xD4) +#define QSERDES_COM_DIV_FRAC_START1_MODE0 COM_OFF(0xDC) +#define QSERDES_COM_DIV_FRAC_START2_MODE0 COM_OFF(0xE0) +#define QSERDES_COM_DIV_FRAC_START3_MODE0 COM_OFF(0xE4) +#define QSERDES_COM_DIV_FRAC_START1_MODE1 COM_OFF(0xE8) +#define QSERDES_COM_DIV_FRAC_START2_MODE1 COM_OFF(0xEC) +#define QSERDES_COM_DIV_FRAC_START3_MODE1 COM_OFF(0xF0) +#define QSERDES_COM_INTEGLOOP_GAIN0_MODE0 COM_OFF(0x108) +#define QSERDES_COM_INTEGLOOP_GAIN1_MODE0 COM_OFF(0x10C) +#define QSERDES_COM_INTEGLOOP_GAIN0_MODE1 COM_OFF(0x110) +#define QSERDES_COM_INTEGLOOP_GAIN1_MODE1 COM_OFF(0x114) +#define QSERDES_COM_VCO_TUNE_CTRL COM_OFF(0x124) +#define QSERDES_COM_VCO_TUNE_MAP COM_OFF(0x128) +#define QSERDES_COM_VCO_TUNE1_MODE0 COM_OFF(0x12C) +#define QSERDES_COM_VCO_TUNE2_MODE0 COM_OFF(0x130) +#define QSERDES_COM_VCO_TUNE1_MODE1 COM_OFF(0x134) +#define QSERDES_COM_VCO_TUNE2_MODE1 COM_OFF(0x138) +#define QSERDES_COM_VCO_TUNE_TIMER1 COM_OFF(0x144) +#define QSERDES_COM_VCO_TUNE_TIMER2 COM_OFF(0x148) +#define QSERDES_COM_CLK_SELECT COM_OFF(0x174) +#define QSERDES_COM_HSCLK_SEL COM_OFF(0x178) +#define QSERDES_COM_CORECLK_DIV COM_OFF(0x184) +#define QSERDES_COM_CORE_CLK_EN COM_OFF(0x18C) +#define QSERDES_COM_CMN_CONFIG COM_OFF(0x194) +#define QSERDES_COM_SVS_MODE_CLK_SEL COM_OFF(0x19C) +#define QSERDES_COM_CORECLK_DIV_MODE1 COM_OFF(0x1BC) + +/* UFS PHY registers */ +#define UFS_PHY_PHY_START PHY_OFF(0x00) +#define UFS_PHY_POWER_DOWN_CONTROL PHY_OFF(0x04) +#define UFS_PHY_PCS_READY_STATUS PHY_OFF(0x168) + +/* UFS PHY TX registers */ +#define QSERDES_TX_HIGHZ_TRANSCEIVER_BIAS_DRVR_EN TX_OFF(0, 0x68) +#define QSERDES_TX_LANE_MODE TX_OFF(0, 0x94) + +/* UFS PHY RX registers */ +#define QSERDES_RX_UCDR_FASTLOCK_FO_GAIN RX_OFF(0, 0x40) +#define QSERDES_RX_RX_TERM_BW RX_OFF(0, 0x90) +#define QSERDES_RX_RX_EQ_GAIN1_LSB RX_OFF(0, 0xC4) +#define QSERDES_RX_RX_EQ_GAIN1_MSB RX_OFF(0, 0xC8) +#define QSERDES_RX_RX_EQ_GAIN2_LSB RX_OFF(0, 0xCC) +#define QSERDES_RX_RX_EQ_GAIN2_MSB RX_OFF(0, 0xD0) +#define QSERDES_RX_RX_EQU_ADAPTOR_CNTRL2 RX_OFF(0, 0xD8) +#define QSERDES_RX_SIGDET_CNTRL RX_OFF(0, 0x114) +#define QSERDES_RX_SIGDET_LVL RX_OFF(0, 0x118) +#define QSERDES_RX_SIGDET_DEGLITCH_CNTRL RX_OFF(0, 0x11C) +#define QSERDES_RX_RX_INTERFACE_MODE RX_OFF(0, 0x12C) + +/* + * This structure represents the 14nm specific phy. + * common_cfg MUST remain the first field in this structure + * in case extra fields are added. This way, when calling + * get_ufs_qcom_phy() of generic phy, we can extract the + * common phy structure (struct ufs_qcom_phy) out of it + * regardless of the relevant specific phy. + */ +struct ufs_qcom_phy_qmp_14nm { + struct ufs_qcom_phy common_cfg; +}; + +static struct ufs_qcom_phy_calibration phy_cal_table_rate_A[] = { + UFS_QCOM_PHY_CAL_ENTRY(UFS_PHY_POWER_DOWN_CONTROL, 0x01), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_CMN_CONFIG, 0x0e), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_SYSCLK_EN_SEL, 0xd7), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_CLK_SELECT, 0x30), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_SYS_CLK_CTRL, 0x06), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_BIAS_EN_CLKBUFLR_EN, 0x08), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_BG_TIMER, 0x0a), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_HSCLK_SEL, 0x05), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_CORECLK_DIV, 0x0a), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_CORECLK_DIV_MODE1, 0x0a), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_LOCK_CMP_EN, 0x01), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_VCO_TUNE_CTRL, 0x10), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_RESETSM_CNTRL, 0x20), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_CORE_CLK_EN, 0x00), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_LOCK_CMP_CFG, 0x00), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_VCO_TUNE_TIMER1, 0xff), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_VCO_TUNE_TIMER2, 0x3f), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_VCO_TUNE_MAP, 0x14), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_SVS_MODE_CLK_SEL, 0x05), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_DEC_START_MODE0, 0x82), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_DIV_FRAC_START1_MODE0, 0x00), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_DIV_FRAC_START2_MODE0, 0x00), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_DIV_FRAC_START3_MODE0, 0x00), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_CP_CTRL_MODE0, 0x0b), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLL_RCTRL_MODE0, 0x16), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLL_CCTRL_MODE0, 0x28), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_INTEGLOOP_GAIN0_MODE0, 0x80), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_INTEGLOOP_GAIN1_MODE0, 0x00), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_VCO_TUNE1_MODE0, 0x28), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_VCO_TUNE2_MODE0, 0x02), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_LOCK_CMP1_MODE0, 0xff), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_LOCK_CMP2_MODE0, 0x0c), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_LOCK_CMP3_MODE0, 0x00), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_DEC_START_MODE1, 0x98), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_DIV_FRAC_START1_MODE1, 0x00), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_DIV_FRAC_START2_MODE1, 0x00), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_DIV_FRAC_START3_MODE1, 0x00), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_CP_CTRL_MODE1, 0x0b), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLL_RCTRL_MODE1, 0x16), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLL_CCTRL_MODE1, 0x28), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_INTEGLOOP_GAIN0_MODE1, 0x80), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_INTEGLOOP_GAIN1_MODE1, 0x00), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_VCO_TUNE1_MODE1, 0xd6), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_VCO_TUNE2_MODE1, 0x00), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_LOCK_CMP1_MODE1, 0x32), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_LOCK_CMP2_MODE1, 0x0f), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_LOCK_CMP3_MODE1, 0x00), + + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_TX_HIGHZ_TRANSCEIVER_BIAS_DRVR_EN, 0x45), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_TX_LANE_MODE, 0x02), + + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_SIGDET_LVL, 0x24), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_SIGDET_CNTRL, 0x02), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_RX_INTERFACE_MODE, 0x00), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_SIGDET_DEGLITCH_CNTRL, 0x18), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_UCDR_FASTLOCK_FO_GAIN, 0x0B), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_RX_TERM_BW, 0x5B), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_RX_EQ_GAIN1_LSB, 0xFF), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_RX_EQ_GAIN1_MSB, 0x3F), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_RX_EQ_GAIN2_LSB, 0xFF), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_RX_EQ_GAIN2_MSB, 0x0F), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL2, 0x0E), +}; + +static struct ufs_qcom_phy_calibration phy_cal_table_rate_B[] = { + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_VCO_TUNE_MAP, 0x54), +}; + +#endif diff --git a/drivers/phy/phy-qcom-ufs-qmp-20nm.c b/drivers/phy/phy-qcom-ufs-qmp-20nm.c new file mode 100644 index 000000000000..8332f96b2c4a --- /dev/null +++ b/drivers/phy/phy-qcom-ufs-qmp-20nm.c @@ -0,0 +1,257 @@ +/* + * Copyright (c) 2013-2015, Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * 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 "phy-qcom-ufs-qmp-20nm.h" + +#define UFS_PHY_NAME "ufs_phy_qmp_20nm" + +static +int ufs_qcom_phy_qmp_20nm_phy_calibrate(struct ufs_qcom_phy *ufs_qcom_phy, + bool is_rate_B) +{ + struct ufs_qcom_phy_calibration *tbl_A, *tbl_B; + int tbl_size_A, tbl_size_B; + u8 major = ufs_qcom_phy->host_ctrl_rev_major; + u16 minor = ufs_qcom_phy->host_ctrl_rev_minor; + u16 step = ufs_qcom_phy->host_ctrl_rev_step; + int err; + + if ((major == 0x1) && (minor == 0x002) && (step == 0x0000)) { + tbl_size_A = ARRAY_SIZE(phy_cal_table_rate_A_1_2_0); + tbl_A = phy_cal_table_rate_A_1_2_0; + } else if ((major == 0x1) && (minor == 0x003) && (step == 0x0000)) { + tbl_size_A = ARRAY_SIZE(phy_cal_table_rate_A_1_3_0); + tbl_A = phy_cal_table_rate_A_1_3_0; + } else { + dev_err(ufs_qcom_phy->dev, "%s: Unknown UFS-PHY version, no calibration values\n", + __func__); + err = -ENODEV; + goto out; + } + + tbl_size_B = ARRAY_SIZE(phy_cal_table_rate_B); + tbl_B = phy_cal_table_rate_B; + + err = ufs_qcom_phy_calibrate(ufs_qcom_phy, tbl_A, tbl_size_A, + tbl_B, tbl_size_B, is_rate_B); + + if (err) + dev_err(ufs_qcom_phy->dev, "%s: ufs_qcom_phy_calibrate() failed %d\n", + __func__, err); + +out: + return err; +} + +static +void ufs_qcom_phy_qmp_20nm_advertise_quirks(struct ufs_qcom_phy *phy_common) +{ + phy_common->quirks = + UFS_QCOM_PHY_QUIRK_HIBERN8_EXIT_AFTER_PHY_PWR_COLLAPSE; +} + +static int ufs_qcom_phy_qmp_20nm_init(struct phy *generic_phy) +{ + struct ufs_qcom_phy_qmp_20nm *phy = phy_get_drvdata(generic_phy); + struct ufs_qcom_phy *phy_common = &phy->common_cfg; + int err = 0; + + err = ufs_qcom_phy_init_clks(generic_phy, phy_common); + if (err) { + dev_err(phy_common->dev, "%s: ufs_qcom_phy_init_clks() failed %d\n", + __func__, err); + goto out; + } + + err = ufs_qcom_phy_init_vregulators(generic_phy, phy_common); + if (err) { + dev_err(phy_common->dev, "%s: ufs_qcom_phy_init_vregulators() failed %d\n", + __func__, err); + goto out; + } + + ufs_qcom_phy_qmp_20nm_advertise_quirks(phy_common); + +out: + return err; +} + +static +void ufs_qcom_phy_qmp_20nm_power_control(struct ufs_qcom_phy *phy, bool val) +{ + bool hibern8_exit_after_pwr_collapse = phy->quirks & + UFS_QCOM_PHY_QUIRK_HIBERN8_EXIT_AFTER_PHY_PWR_COLLAPSE; + + if (val) { + writel_relaxed(0x1, phy->mmio + UFS_PHY_POWER_DOWN_CONTROL); + /* + * Before any transactions involving PHY, ensure PHY knows + * that it's analog rail is powered ON. + */ + mb(); + + if (hibern8_exit_after_pwr_collapse) { + /* + * Give atleast 1us delay after restoring PHY analog + * power. + */ + usleep_range(1, 2); + writel_relaxed(0x0A, phy->mmio + + QSERDES_COM_SYSCLK_EN_SEL_TXBAND); + writel_relaxed(0x08, phy->mmio + + QSERDES_COM_SYSCLK_EN_SEL_TXBAND); + /* + * Make sure workaround is deactivated before proceeding + * with normal PHY operations. + */ + mb(); + } + } else { + if (hibern8_exit_after_pwr_collapse) { + writel_relaxed(0x0A, phy->mmio + + QSERDES_COM_SYSCLK_EN_SEL_TXBAND); + writel_relaxed(0x02, phy->mmio + + QSERDES_COM_SYSCLK_EN_SEL_TXBAND); + /* + * Make sure that above workaround is activated before + * PHY analog power collapse. + */ + mb(); + } + + writel_relaxed(0x0, phy->mmio + UFS_PHY_POWER_DOWN_CONTROL); + /* + * ensure that PHY knows its PHY analog rail is going + * to be powered down + */ + mb(); + } +} + +static +void ufs_qcom_phy_qmp_20nm_set_tx_lane_enable(struct ufs_qcom_phy *phy, u32 val) +{ + writel_relaxed(val & UFS_PHY_TX_LANE_ENABLE_MASK, + phy->mmio + UFS_PHY_TX_LANE_ENABLE); + mb(); +} + +static inline void ufs_qcom_phy_qmp_20nm_start_serdes(struct ufs_qcom_phy *phy) +{ + u32 tmp; + + tmp = readl_relaxed(phy->mmio + UFS_PHY_PHY_START); + tmp &= ~MASK_SERDES_START; + tmp |= (1 << OFFSET_SERDES_START); + writel_relaxed(tmp, phy->mmio + UFS_PHY_PHY_START); + mb(); +} + +static int ufs_qcom_phy_qmp_20nm_is_pcs_ready(struct ufs_qcom_phy *phy_common) +{ + int err = 0; + u32 val; + + err = readl_poll_timeout(phy_common->mmio + UFS_PHY_PCS_READY_STATUS, + val, (val & MASK_PCS_READY), 10, 1000000); + if (err) + dev_err(phy_common->dev, "%s: poll for pcs failed err = %d\n", + __func__, err); + return err; +} + +static struct phy_ops ufs_qcom_phy_qmp_20nm_phy_ops = { + .init = ufs_qcom_phy_qmp_20nm_init, + .exit = ufs_qcom_phy_exit, + .power_on = ufs_qcom_phy_power_on, + .power_off = ufs_qcom_phy_power_off, + .owner = THIS_MODULE, +}; + +static struct ufs_qcom_phy_specific_ops phy_20nm_ops = { + .calibrate_phy = ufs_qcom_phy_qmp_20nm_phy_calibrate, + .start_serdes = ufs_qcom_phy_qmp_20nm_start_serdes, + .is_physical_coding_sublayer_ready = ufs_qcom_phy_qmp_20nm_is_pcs_ready, + .set_tx_lane_enable = ufs_qcom_phy_qmp_20nm_set_tx_lane_enable, + .power_control = ufs_qcom_phy_qmp_20nm_power_control, +}; + +static int ufs_qcom_phy_qmp_20nm_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct phy *generic_phy; + struct ufs_qcom_phy_qmp_20nm *phy; + int err = 0; + + phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL); + if (!phy) { + dev_err(dev, "%s: failed to allocate phy\n", __func__); + err = -ENOMEM; + goto out; + } + + generic_phy = ufs_qcom_phy_generic_probe(pdev, &phy->common_cfg, + &ufs_qcom_phy_qmp_20nm_phy_ops, &phy_20nm_ops); + + if (!generic_phy) { + dev_err(dev, "%s: ufs_qcom_phy_generic_probe() failed\n", + __func__); + err = -EIO; + goto out; + } + + phy_set_drvdata(generic_phy, phy); + + strlcpy(phy->common_cfg.name, UFS_PHY_NAME, + sizeof(phy->common_cfg.name)); + +out: + return err; +} + +static int ufs_qcom_phy_qmp_20nm_remove(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct phy *generic_phy = to_phy(dev); + struct ufs_qcom_phy *ufs_qcom_phy = get_ufs_qcom_phy(generic_phy); + int err = 0; + + err = ufs_qcom_phy_remove(generic_phy, ufs_qcom_phy); + if (err) + dev_err(dev, "%s: ufs_qcom_phy_remove failed = %d\n", + __func__, err); + + return err; +} + +static const struct of_device_id ufs_qcom_phy_qmp_20nm_of_match[] = { + {.compatible = "qcom,ufs-phy-qmp-20nm"}, + {}, +}; +MODULE_DEVICE_TABLE(of, ufs_qcom_phy_qmp_20nm_of_match); + +static struct platform_driver ufs_qcom_phy_qmp_20nm_driver = { + .probe = ufs_qcom_phy_qmp_20nm_probe, + .remove = ufs_qcom_phy_qmp_20nm_remove, + .driver = { + .of_match_table = ufs_qcom_phy_qmp_20nm_of_match, + .name = "ufs_qcom_phy_qmp_20nm", + .owner = THIS_MODULE, + }, +}; + +module_platform_driver(ufs_qcom_phy_qmp_20nm_driver); + +MODULE_DESCRIPTION("Universal Flash Storage (UFS) QCOM PHY QMP 20nm"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/phy/phy-qcom-ufs-qmp-20nm.h b/drivers/phy/phy-qcom-ufs-qmp-20nm.h new file mode 100644 index 000000000000..4f3076bb3d71 --- /dev/null +++ b/drivers/phy/phy-qcom-ufs-qmp-20nm.h @@ -0,0 +1,235 @@ +/* + * Copyright (c) 2013-2015, Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * 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. + * + */ + +#ifndef UFS_QCOM_PHY_QMP_20NM_H_ +#define UFS_QCOM_PHY_QMP_20NM_H_ + +#include "phy-qcom-ufs-i.h" + +/* QCOM UFS PHY control registers */ + +#define COM_OFF(x) (0x000 + x) +#define PHY_OFF(x) (0xC00 + x) +#define TX_OFF(n, x) (0x400 + (0x400 * n) + x) +#define RX_OFF(n, x) (0x600 + (0x400 * n) + x) + +/* UFS PHY PLL block registers */ +#define QSERDES_COM_SYS_CLK_CTRL COM_OFF(0x0) +#define QSERDES_COM_PLL_VCOTAIL_EN COM_OFF(0x04) +#define QSERDES_COM_PLL_CNTRL COM_OFF(0x14) +#define QSERDES_COM_PLL_IP_SETI COM_OFF(0x24) +#define QSERDES_COM_CORE_CLK_IN_SYNC_SEL COM_OFF(0x28) +#define QSERDES_COM_BIAS_EN_CLKBUFLR_EN COM_OFF(0x30) +#define QSERDES_COM_PLL_CP_SETI COM_OFF(0x34) +#define QSERDES_COM_PLL_IP_SETP COM_OFF(0x38) +#define QSERDES_COM_PLL_CP_SETP COM_OFF(0x3C) +#define QSERDES_COM_SYSCLK_EN_SEL_TXBAND COM_OFF(0x48) +#define QSERDES_COM_RESETSM_CNTRL COM_OFF(0x4C) +#define QSERDES_COM_RESETSM_CNTRL2 COM_OFF(0x50) +#define QSERDES_COM_PLLLOCK_CMP1 COM_OFF(0x90) +#define QSERDES_COM_PLLLOCK_CMP2 COM_OFF(0x94) +#define QSERDES_COM_PLLLOCK_CMP3 COM_OFF(0x98) +#define QSERDES_COM_PLLLOCK_CMP_EN COM_OFF(0x9C) +#define QSERDES_COM_BGTC COM_OFF(0xA0) +#define QSERDES_COM_DEC_START1 COM_OFF(0xAC) +#define QSERDES_COM_PLL_AMP_OS COM_OFF(0xB0) +#define QSERDES_COM_RES_CODE_UP_OFFSET COM_OFF(0xD8) +#define QSERDES_COM_RES_CODE_DN_OFFSET COM_OFF(0xDC) +#define QSERDES_COM_DIV_FRAC_START1 COM_OFF(0x100) +#define QSERDES_COM_DIV_FRAC_START2 COM_OFF(0x104) +#define QSERDES_COM_DIV_FRAC_START3 COM_OFF(0x108) +#define QSERDES_COM_DEC_START2 COM_OFF(0x10C) +#define QSERDES_COM_PLL_RXTXEPCLK_EN COM_OFF(0x110) +#define QSERDES_COM_PLL_CRCTRL COM_OFF(0x114) +#define QSERDES_COM_PLL_CLKEPDIV COM_OFF(0x118) + +/* TX LANE n (0, 1) registers */ +#define QSERDES_TX_EMP_POST1_LVL(n) TX_OFF(n, 0x08) +#define QSERDES_TX_DRV_LVL(n) TX_OFF(n, 0x0C) +#define QSERDES_TX_LANE_MODE(n) TX_OFF(n, 0x54) + +/* RX LANE n (0, 1) registers */ +#define QSERDES_RX_CDR_CONTROL1(n) RX_OFF(n, 0x0) +#define QSERDES_RX_CDR_CONTROL_HALF(n) RX_OFF(n, 0x8) +#define QSERDES_RX_RX_EQ_GAIN1_LSB(n) RX_OFF(n, 0xA8) +#define QSERDES_RX_RX_EQ_GAIN1_MSB(n) RX_OFF(n, 0xAC) +#define QSERDES_RX_RX_EQ_GAIN2_LSB(n) RX_OFF(n, 0xB0) +#define QSERDES_RX_RX_EQ_GAIN2_MSB(n) RX_OFF(n, 0xB4) +#define QSERDES_RX_RX_EQU_ADAPTOR_CNTRL2(n) RX_OFF(n, 0xBC) +#define QSERDES_RX_CDR_CONTROL_QUARTER(n) RX_OFF(n, 0xC) +#define QSERDES_RX_SIGDET_CNTRL(n) RX_OFF(n, 0x100) + +/* UFS PHY registers */ +#define UFS_PHY_PHY_START PHY_OFF(0x00) +#define UFS_PHY_POWER_DOWN_CONTROL PHY_OFF(0x4) +#define UFS_PHY_TX_LANE_ENABLE PHY_OFF(0x44) +#define UFS_PHY_PWM_G1_CLK_DIVIDER PHY_OFF(0x08) +#define UFS_PHY_PWM_G2_CLK_DIVIDER PHY_OFF(0x0C) +#define UFS_PHY_PWM_G3_CLK_DIVIDER PHY_OFF(0x10) +#define UFS_PHY_PWM_G4_CLK_DIVIDER PHY_OFF(0x14) +#define UFS_PHY_CORECLK_PWM_G1_CLK_DIVIDER PHY_OFF(0x34) +#define UFS_PHY_CORECLK_PWM_G2_CLK_DIVIDER PHY_OFF(0x38) +#define UFS_PHY_CORECLK_PWM_G3_CLK_DIVIDER PHY_OFF(0x3C) +#define UFS_PHY_CORECLK_PWM_G4_CLK_DIVIDER PHY_OFF(0x40) +#define UFS_PHY_OMC_STATUS_RDVAL PHY_OFF(0x68) +#define UFS_PHY_LINE_RESET_TIME PHY_OFF(0x28) +#define UFS_PHY_LINE_RESET_GRANULARITY PHY_OFF(0x2C) +#define UFS_PHY_TSYNC_RSYNC_CNTL PHY_OFF(0x48) +#define UFS_PHY_PLL_CNTL PHY_OFF(0x50) +#define UFS_PHY_TX_LARGE_AMP_DRV_LVL PHY_OFF(0x54) +#define UFS_PHY_TX_SMALL_AMP_DRV_LVL PHY_OFF(0x5C) +#define UFS_PHY_TX_LARGE_AMP_POST_EMP_LVL PHY_OFF(0x58) +#define UFS_PHY_TX_SMALL_AMP_POST_EMP_LVL PHY_OFF(0x60) +#define UFS_PHY_CFG_CHANGE_CNT_VAL PHY_OFF(0x64) +#define UFS_PHY_RX_SYNC_WAIT_TIME PHY_OFF(0x6C) +#define UFS_PHY_TX_MIN_SLEEP_NOCONFIG_TIME_CAPABILITY PHY_OFF(0xB4) +#define UFS_PHY_RX_MIN_SLEEP_NOCONFIG_TIME_CAPABILITY PHY_OFF(0xE0) +#define UFS_PHY_TX_MIN_STALL_NOCONFIG_TIME_CAPABILITY PHY_OFF(0xB8) +#define UFS_PHY_RX_MIN_STALL_NOCONFIG_TIME_CAPABILITY PHY_OFF(0xE4) +#define UFS_PHY_TX_MIN_SAVE_CONFIG_TIME_CAPABILITY PHY_OFF(0xBC) +#define UFS_PHY_RX_MIN_SAVE_CONFIG_TIME_CAPABILITY PHY_OFF(0xE8) +#define UFS_PHY_RX_PWM_BURST_CLOSURE_LENGTH_CAPABILITY PHY_OFF(0xFC) +#define UFS_PHY_RX_MIN_ACTIVATETIME_CAPABILITY PHY_OFF(0x100) +#define UFS_PHY_RX_SIGDET_CTRL3 PHY_OFF(0x14c) +#define UFS_PHY_RMMI_ATTR_CTRL PHY_OFF(0x160) +#define UFS_PHY_RMMI_RX_CFGUPDT_L1 (1 << 7) +#define UFS_PHY_RMMI_TX_CFGUPDT_L1 (1 << 6) +#define UFS_PHY_RMMI_CFGWR_L1 (1 << 5) +#define UFS_PHY_RMMI_CFGRD_L1 (1 << 4) +#define UFS_PHY_RMMI_RX_CFGUPDT_L0 (1 << 3) +#define UFS_PHY_RMMI_TX_CFGUPDT_L0 (1 << 2) +#define UFS_PHY_RMMI_CFGWR_L0 (1 << 1) +#define UFS_PHY_RMMI_CFGRD_L0 (1 << 0) +#define UFS_PHY_RMMI_ATTRID PHY_OFF(0x164) +#define UFS_PHY_RMMI_ATTRWRVAL PHY_OFF(0x168) +#define UFS_PHY_RMMI_ATTRRDVAL_L0_STATUS PHY_OFF(0x16C) +#define UFS_PHY_RMMI_ATTRRDVAL_L1_STATUS PHY_OFF(0x170) +#define UFS_PHY_PCS_READY_STATUS PHY_OFF(0x174) + +#define UFS_PHY_TX_LANE_ENABLE_MASK 0x3 + +/* + * This structure represents the 20nm specific phy. + * common_cfg MUST remain the first field in this structure + * in case extra fields are added. This way, when calling + * get_ufs_qcom_phy() of generic phy, we can extract the + * common phy structure (struct ufs_qcom_phy) out of it + * regardless of the relevant specific phy. + */ +struct ufs_qcom_phy_qmp_20nm { + struct ufs_qcom_phy common_cfg; +}; + +static struct ufs_qcom_phy_calibration phy_cal_table_rate_A_1_2_0[] = { + UFS_QCOM_PHY_CAL_ENTRY(UFS_PHY_POWER_DOWN_CONTROL, 0x01), + UFS_QCOM_PHY_CAL_ENTRY(UFS_PHY_RX_SIGDET_CTRL3, 0x0D), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLL_VCOTAIL_EN, 0xe1), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLL_CRCTRL, 0xcc), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_SYSCLK_EN_SEL_TXBAND, 0x08), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLL_CLKEPDIV, 0x03), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLL_RXTXEPCLK_EN, 0x10), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_DEC_START1, 0x82), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_DEC_START2, 0x03), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_DIV_FRAC_START1, 0x80), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_DIV_FRAC_START2, 0x80), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_DIV_FRAC_START3, 0x40), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLLLOCK_CMP1, 0xff), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLLLOCK_CMP2, 0x19), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLLLOCK_CMP3, 0x00), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLLLOCK_CMP_EN, 0x03), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_RESETSM_CNTRL, 0x90), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_RESETSM_CNTRL2, 0x03), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_CDR_CONTROL1(0), 0xf2), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_CDR_CONTROL_HALF(0), 0x0c), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_CDR_CONTROL_QUARTER(0), 0x12), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_CDR_CONTROL1(1), 0xf2), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_CDR_CONTROL_HALF(1), 0x0c), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_CDR_CONTROL_QUARTER(1), 0x12), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_RX_EQ_GAIN1_LSB(0), 0xff), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_RX_EQ_GAIN1_MSB(0), 0xff), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_RX_EQ_GAIN2_LSB(0), 0xff), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_RX_EQ_GAIN2_MSB(0), 0x00), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_RX_EQ_GAIN1_LSB(1), 0xff), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_RX_EQ_GAIN1_MSB(1), 0xff), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_RX_EQ_GAIN2_LSB(1), 0xff), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_RX_EQ_GAIN2_MSB(1), 0x00), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLL_CP_SETI, 0x3f), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLL_IP_SETP, 0x1b), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLL_CP_SETP, 0x0f), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLL_IP_SETI, 0x01), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_TX_EMP_POST1_LVL(0), 0x2F), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_TX_DRV_LVL(0), 0x20), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_TX_EMP_POST1_LVL(1), 0x2F), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_TX_DRV_LVL(1), 0x20), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_TX_LANE_MODE(0), 0x68), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_TX_LANE_MODE(1), 0x68), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL2(1), 0xdc), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL2(0), 0xdc), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_BIAS_EN_CLKBUFLR_EN, 0x3), +}; + +static struct ufs_qcom_phy_calibration phy_cal_table_rate_A_1_3_0[] = { + UFS_QCOM_PHY_CAL_ENTRY(UFS_PHY_POWER_DOWN_CONTROL, 0x01), + UFS_QCOM_PHY_CAL_ENTRY(UFS_PHY_RX_SIGDET_CTRL3, 0x0D), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLL_VCOTAIL_EN, 0xe1), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLL_CRCTRL, 0xcc), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_SYSCLK_EN_SEL_TXBAND, 0x08), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLL_CLKEPDIV, 0x03), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLL_RXTXEPCLK_EN, 0x10), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_DEC_START1, 0x82), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_DEC_START2, 0x03), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_DIV_FRAC_START1, 0x80), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_DIV_FRAC_START2, 0x80), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_DIV_FRAC_START3, 0x40), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLLLOCK_CMP1, 0xff), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLLLOCK_CMP2, 0x19), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLLLOCK_CMP3, 0x00), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLLLOCK_CMP_EN, 0x03), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_RESETSM_CNTRL, 0x90), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_RESETSM_CNTRL2, 0x03), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_CDR_CONTROL1(0), 0xf2), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_CDR_CONTROL_HALF(0), 0x0c), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_CDR_CONTROL_QUARTER(0), 0x12), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_CDR_CONTROL1(1), 0xf2), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_CDR_CONTROL_HALF(1), 0x0c), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_CDR_CONTROL_QUARTER(1), 0x12), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_RX_EQ_GAIN1_LSB(0), 0xff), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_RX_EQ_GAIN1_MSB(0), 0xff), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_RX_EQ_GAIN2_LSB(0), 0xff), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_RX_EQ_GAIN2_MSB(0), 0x00), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_RX_EQ_GAIN1_LSB(1), 0xff), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_RX_EQ_GAIN1_MSB(1), 0xff), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_RX_EQ_GAIN2_LSB(1), 0xff), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_RX_EQ_GAIN2_MSB(1), 0x00), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLL_CP_SETI, 0x2b), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLL_IP_SETP, 0x38), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLL_CP_SETP, 0x3c), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_RES_CODE_UP_OFFSET, 0x02), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_RES_CODE_DN_OFFSET, 0x02), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLL_IP_SETI, 0x01), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLL_CNTRL, 0x40), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_TX_LANE_MODE(0), 0x68), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_TX_LANE_MODE(1), 0x68), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL2(1), 0xdc), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL2(0), 0xdc), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_BIAS_EN_CLKBUFLR_EN, 0x3), +}; + +static struct ufs_qcom_phy_calibration phy_cal_table_rate_B[] = { + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_DEC_START1, 0x98), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLLLOCK_CMP1, 0x65), + UFS_QCOM_PHY_CAL_ENTRY(QSERDES_COM_PLLLOCK_CMP2, 0x1e), +}; + +#endif diff --git a/drivers/phy/phy-qcom-ufs.c b/drivers/phy/phy-qcom-ufs.c new file mode 100644 index 000000000000..44ee983d57fe --- /dev/null +++ b/drivers/phy/phy-qcom-ufs.c @@ -0,0 +1,745 @@ +/* + * Copyright (c) 2013-2015, Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * 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 "phy-qcom-ufs-i.h" + +#define MAX_PROP_NAME 32 +#define VDDA_PHY_MIN_UV 1000000 +#define VDDA_PHY_MAX_UV 1000000 +#define VDDA_PLL_MIN_UV 1800000 +#define VDDA_PLL_MAX_UV 1800000 +#define VDDP_REF_CLK_MIN_UV 1200000 +#define VDDP_REF_CLK_MAX_UV 1200000 + +static int __ufs_qcom_phy_init_vreg(struct phy *, struct ufs_qcom_phy_vreg *, + const char *, bool); +static int ufs_qcom_phy_init_vreg(struct phy *, struct ufs_qcom_phy_vreg *, + const char *); +static int ufs_qcom_phy_base_init(struct platform_device *pdev, + struct ufs_qcom_phy *phy_common); + +int ufs_qcom_phy_calibrate(struct ufs_qcom_phy *ufs_qcom_phy, + struct ufs_qcom_phy_calibration *tbl_A, + int tbl_size_A, + struct ufs_qcom_phy_calibration *tbl_B, + int tbl_size_B, bool is_rate_B) +{ + int i; + int ret = 0; + + if (!tbl_A) { + dev_err(ufs_qcom_phy->dev, "%s: tbl_A is NULL", __func__); + ret = EINVAL; + goto out; + } + + for (i = 0; i < tbl_size_A; i++) + writel_relaxed(tbl_A[i].cfg_value, + ufs_qcom_phy->mmio + tbl_A[i].reg_offset); + + /* + * In case we would like to work in rate B, we need + * to override a registers that were configured in rate A table + * with registers of rate B table. + * table. + */ + if (is_rate_B) { + if (!tbl_B) { + dev_err(ufs_qcom_phy->dev, "%s: tbl_B is NULL", + __func__); + ret = EINVAL; + goto out; + } + + for (i = 0; i < tbl_size_B; i++) + writel_relaxed(tbl_B[i].cfg_value, + ufs_qcom_phy->mmio + tbl_B[i].reg_offset); + } + + /* flush buffered writes */ + mb(); + +out: + return ret; +} + +struct phy *ufs_qcom_phy_generic_probe(struct platform_device *pdev, + struct ufs_qcom_phy *common_cfg, + struct phy_ops *ufs_qcom_phy_gen_ops, + struct ufs_qcom_phy_specific_ops *phy_spec_ops) +{ + int err; + struct device *dev = &pdev->dev; + struct phy *generic_phy = NULL; + struct phy_provider *phy_provider; + + err = ufs_qcom_phy_base_init(pdev, common_cfg); + if (err) { + dev_err(dev, "%s: phy base init failed %d\n", __func__, err); + goto out; + } + + phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); + if (IS_ERR(phy_provider)) { + err = PTR_ERR(phy_provider); + dev_err(dev, "%s: failed to register phy %d\n", __func__, err); + goto out; + } + + generic_phy = devm_phy_create(dev, NULL, ufs_qcom_phy_gen_ops); + if (IS_ERR(generic_phy)) { + err = PTR_ERR(generic_phy); + dev_err(dev, "%s: failed to create phy %d\n", __func__, err); + goto out; + } + + common_cfg->phy_spec_ops = phy_spec_ops; + common_cfg->dev = dev; + +out: + return generic_phy; +} + +/* + * This assumes the embedded phy structure inside generic_phy is of type + * struct ufs_qcom_phy. In order to function properly it's crucial + * to keep the embedded struct "struct ufs_qcom_phy common_cfg" + * as the first inside generic_phy. + */ +struct ufs_qcom_phy *get_ufs_qcom_phy(struct phy *generic_phy) +{ + return (struct ufs_qcom_phy *)phy_get_drvdata(generic_phy); +} + +static +int ufs_qcom_phy_base_init(struct platform_device *pdev, + struct ufs_qcom_phy *phy_common) +{ + struct device *dev = &pdev->dev; + struct resource *res; + int err = 0; + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy_mem"); + if (!res) { + dev_err(dev, "%s: phy_mem resource not found\n", __func__); + err = -ENOMEM; + goto out; + } + + phy_common->mmio = devm_ioremap_resource(dev, res); + if (IS_ERR((void const *)phy_common->mmio)) { + err = PTR_ERR((void const *)phy_common->mmio); + phy_common->mmio = NULL; + dev_err(dev, "%s: ioremap for phy_mem resource failed %d\n", + __func__, err); + goto out; + } + + /* "dev_ref_clk_ctrl_mem" is optional resource */ + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, + "dev_ref_clk_ctrl_mem"); + if (!res) { + dev_dbg(dev, "%s: dev_ref_clk_ctrl_mem resource not found\n", + __func__); + goto out; + } + + phy_common->dev_ref_clk_ctrl_mmio = devm_ioremap_resource(dev, res); + if (IS_ERR((void const *)phy_common->dev_ref_clk_ctrl_mmio)) { + err = PTR_ERR((void const *)phy_common->dev_ref_clk_ctrl_mmio); + phy_common->dev_ref_clk_ctrl_mmio = NULL; + dev_err(dev, "%s: ioremap for dev_ref_clk_ctrl_mem resource failed %d\n", + __func__, err); + } + +out: + return err; +} + +static int __ufs_qcom_phy_clk_get(struct phy *phy, + const char *name, struct clk **clk_out, bool err_print) +{ + struct clk *clk; + int err = 0; + struct ufs_qcom_phy *ufs_qcom_phy = get_ufs_qcom_phy(phy); + struct device *dev = ufs_qcom_phy->dev; + + clk = devm_clk_get(dev, name); + if (IS_ERR(clk)) { + err = PTR_ERR(clk); + if (err_print) + dev_err(dev, "failed to get %s err %d", name, err); + } else { + *clk_out = clk; + } + + return err; +} + +static +int ufs_qcom_phy_clk_get(struct phy *phy, + const char *name, struct clk **clk_out) +{ + return __ufs_qcom_phy_clk_get(phy, name, clk_out, true); +} + +int +ufs_qcom_phy_init_clks(struct phy *generic_phy, + struct ufs_qcom_phy *phy_common) +{ + int err; + + err = ufs_qcom_phy_clk_get(generic_phy, "tx_iface_clk", + &phy_common->tx_iface_clk); + if (err) + goto out; + + err = ufs_qcom_phy_clk_get(generic_phy, "rx_iface_clk", + &phy_common->rx_iface_clk); + if (err) + goto out; + + err = ufs_qcom_phy_clk_get(generic_phy, "ref_clk_src", + &phy_common->ref_clk_src); + if (err) + goto out; + + /* + * "ref_clk_parent" is optional hence don't abort init if it's not + * found. + */ + __ufs_qcom_phy_clk_get(generic_phy, "ref_clk_parent", + &phy_common->ref_clk_parent, false); + + err = ufs_qcom_phy_clk_get(generic_phy, "ref_clk", + &phy_common->ref_clk); + +out: + return err; +} + +int +ufs_qcom_phy_init_vregulators(struct phy *generic_phy, + struct ufs_qcom_phy *phy_common) +{ + int err; + + err = ufs_qcom_phy_init_vreg(generic_phy, &phy_common->vdda_pll, + "vdda-pll"); + if (err) + goto out; + + err = ufs_qcom_phy_init_vreg(generic_phy, &phy_common->vdda_phy, + "vdda-phy"); + + if (err) + goto out; + + /* vddp-ref-clk-* properties are optional */ + __ufs_qcom_phy_init_vreg(generic_phy, &phy_common->vddp_ref_clk, + "vddp-ref-clk", true); +out: + return err; +} + +static int __ufs_qcom_phy_init_vreg(struct phy *phy, + struct ufs_qcom_phy_vreg *vreg, const char *name, bool optional) +{ + int err = 0; + struct ufs_qcom_phy *ufs_qcom_phy = get_ufs_qcom_phy(phy); + struct device *dev = ufs_qcom_phy->dev; + + char prop_name[MAX_PROP_NAME]; + + vreg->name = kstrdup(name, GFP_KERNEL); + if (!vreg->name) { + err = -ENOMEM; + goto out; + } + + vreg->reg = devm_regulator_get(dev, name); + if (IS_ERR(vreg->reg)) { + err = PTR_ERR(vreg->reg); + vreg->reg = NULL; + if (!optional) + dev_err(dev, "failed to get %s, %d\n", name, err); + goto out; + } + + if (dev->of_node) { + snprintf(prop_name, MAX_PROP_NAME, "%s-max-microamp", name); + err = of_property_read_u32(dev->of_node, + prop_name, &vreg->max_uA); + if (err && err != -EINVAL) { + dev_err(dev, "%s: failed to read %s\n", + __func__, prop_name); + goto out; + } else if (err == -EINVAL || !vreg->max_uA) { + if (regulator_count_voltages(vreg->reg) > 0) { + dev_err(dev, "%s: %s is mandatory\n", + __func__, prop_name); + goto out; + } + err = 0; + } + snprintf(prop_name, MAX_PROP_NAME, "%s-always-on", name); + if (of_get_property(dev->of_node, prop_name, NULL)) + vreg->is_always_on = true; + else + vreg->is_always_on = false; + } + + if (!strcmp(name, "vdda-pll")) { + vreg->max_uV = VDDA_PLL_MAX_UV; + vreg->min_uV = VDDA_PLL_MIN_UV; + } else if (!strcmp(name, "vdda-phy")) { + vreg->max_uV = VDDA_PHY_MAX_UV; + vreg->min_uV = VDDA_PHY_MIN_UV; + } else if (!strcmp(name, "vddp-ref-clk")) { + vreg->max_uV = VDDP_REF_CLK_MAX_UV; + vreg->min_uV = VDDP_REF_CLK_MIN_UV; + } + +out: + if (err) + kfree(vreg->name); + return err; +} + +static int ufs_qcom_phy_init_vreg(struct phy *phy, + struct ufs_qcom_phy_vreg *vreg, const char *name) +{ + return __ufs_qcom_phy_init_vreg(phy, vreg, name, false); +} + +static +int ufs_qcom_phy_cfg_vreg(struct phy *phy, + struct ufs_qcom_phy_vreg *vreg, bool on) +{ + int ret = 0; + struct regulator *reg = vreg->reg; + const char *name = vreg->name; + int min_uV; + int uA_load; + struct ufs_qcom_phy *ufs_qcom_phy = get_ufs_qcom_phy(phy); + struct device *dev = ufs_qcom_phy->dev; + + BUG_ON(!vreg); + + if (regulator_count_voltages(reg) > 0) { + min_uV = on ? vreg->min_uV : 0; + ret = regulator_set_voltage(reg, min_uV, vreg->max_uV); + if (ret) { + dev_err(dev, "%s: %s set voltage failed, err=%d\n", + __func__, name, ret); + goto out; + } + uA_load = on ? vreg->max_uA : 0; + ret = regulator_set_optimum_mode(reg, uA_load); + if (ret >= 0) { + /* + * regulator_set_optimum_mode() returns new regulator + * mode upon success. + */ + ret = 0; + } else { + dev_err(dev, "%s: %s set optimum mode(uA_load=%d) failed, err=%d\n", + __func__, name, uA_load, ret); + goto out; + } + } +out: + return ret; +} + +static +int ufs_qcom_phy_enable_vreg(struct phy *phy, + struct ufs_qcom_phy_vreg *vreg) +{ + struct ufs_qcom_phy *ufs_qcom_phy = get_ufs_qcom_phy(phy); + struct device *dev = ufs_qcom_phy->dev; + int ret = 0; + + if (!vreg || vreg->enabled) + goto out; + + ret = ufs_qcom_phy_cfg_vreg(phy, vreg, true); + if (ret) { + dev_err(dev, "%s: ufs_qcom_phy_cfg_vreg() failed, err=%d\n", + __func__, ret); + goto out; + } + + ret = regulator_enable(vreg->reg); + if (ret) { + dev_err(dev, "%s: enable failed, err=%d\n", + __func__, ret); + goto out; + } + + vreg->enabled = true; +out: + return ret; +} + +int ufs_qcom_phy_enable_ref_clk(struct phy *generic_phy) +{ + int ret = 0; + struct ufs_qcom_phy *phy = get_ufs_qcom_phy(generic_phy); + + if (phy->is_ref_clk_enabled) + goto out; + + /* + * reference clock is propagated in a daisy-chained manner from + * source to phy, so ungate them at each stage. + */ + ret = clk_prepare_enable(phy->ref_clk_src); + if (ret) { + dev_err(phy->dev, "%s: ref_clk_src enable failed %d\n", + __func__, ret); + goto out; + } + + /* + * "ref_clk_parent" is optional clock hence make sure that clk reference + * is available before trying to enable the clock. + */ + if (phy->ref_clk_parent) { + ret = clk_prepare_enable(phy->ref_clk_parent); + if (ret) { + dev_err(phy->dev, "%s: ref_clk_parent enable failed %d\n", + __func__, ret); + goto out_disable_src; + } + } + + ret = clk_prepare_enable(phy->ref_clk); + if (ret) { + dev_err(phy->dev, "%s: ref_clk enable failed %d\n", + __func__, ret); + goto out_disable_parent; + } + + phy->is_ref_clk_enabled = true; + goto out; + +out_disable_parent: + if (phy->ref_clk_parent) + clk_disable_unprepare(phy->ref_clk_parent); +out_disable_src: + clk_disable_unprepare(phy->ref_clk_src); +out: + return ret; +} + +static +int ufs_qcom_phy_disable_vreg(struct phy *phy, + struct ufs_qcom_phy_vreg *vreg) +{ + struct ufs_qcom_phy *ufs_qcom_phy = get_ufs_qcom_phy(phy); + struct device *dev = ufs_qcom_phy->dev; + int ret = 0; + + if (!vreg || !vreg->enabled || vreg->is_always_on) + goto out; + + ret = regulator_disable(vreg->reg); + + if (!ret) { + /* ignore errors on applying disable config */ + ufs_qcom_phy_cfg_vreg(phy, vreg, false); + vreg->enabled = false; + } else { + dev_err(dev, "%s: %s disable failed, err=%d\n", + __func__, vreg->name, ret); + } +out: + return ret; +} + +void ufs_qcom_phy_disable_ref_clk(struct phy *generic_phy) +{ + struct ufs_qcom_phy *phy = get_ufs_qcom_phy(generic_phy); + + if (phy->is_ref_clk_enabled) { + clk_disable_unprepare(phy->ref_clk); + /* + * "ref_clk_parent" is optional clock hence make sure that clk + * reference is available before trying to disable the clock. + */ + if (phy->ref_clk_parent) + clk_disable_unprepare(phy->ref_clk_parent); + clk_disable_unprepare(phy->ref_clk_src); + phy->is_ref_clk_enabled = false; + } +} + +#define UFS_REF_CLK_EN (1 << 5) + +static void ufs_qcom_phy_dev_ref_clk_ctrl(struct phy *generic_phy, bool enable) +{ + struct ufs_qcom_phy *phy = get_ufs_qcom_phy(generic_phy); + + if (phy->dev_ref_clk_ctrl_mmio && + (enable ^ phy->is_dev_ref_clk_enabled)) { + u32 temp = readl_relaxed(phy->dev_ref_clk_ctrl_mmio); + + if (enable) + temp |= UFS_REF_CLK_EN; + else + temp &= ~UFS_REF_CLK_EN; + + /* + * If we are here to disable this clock immediately after + * entering into hibern8, we need to make sure that device + * ref_clk is active atleast 1us after the hibern8 enter. + */ + if (!enable) + udelay(1); + + writel_relaxed(temp, phy->dev_ref_clk_ctrl_mmio); + /* ensure that ref_clk is enabled/disabled before we return */ + wmb(); + /* + * If we call hibern8 exit after this, we need to make sure that + * device ref_clk is stable for atleast 1us before the hibern8 + * exit command. + */ + if (enable) + udelay(1); + + phy->is_dev_ref_clk_enabled = enable; + } +} + +void ufs_qcom_phy_enable_dev_ref_clk(struct phy *generic_phy) +{ + ufs_qcom_phy_dev_ref_clk_ctrl(generic_phy, true); +} + +void ufs_qcom_phy_disable_dev_ref_clk(struct phy *generic_phy) +{ + ufs_qcom_phy_dev_ref_clk_ctrl(generic_phy, false); +} + +/* Turn ON M-PHY RMMI interface clocks */ +int ufs_qcom_phy_enable_iface_clk(struct phy *generic_phy) +{ + struct ufs_qcom_phy *phy = get_ufs_qcom_phy(generic_phy); + int ret = 0; + + if (phy->is_iface_clk_enabled) + goto out; + + ret = clk_prepare_enable(phy->tx_iface_clk); + if (ret) { + dev_err(phy->dev, "%s: tx_iface_clk enable failed %d\n", + __func__, ret); + goto out; + } + ret = clk_prepare_enable(phy->rx_iface_clk); + if (ret) { + clk_disable_unprepare(phy->tx_iface_clk); + dev_err(phy->dev, "%s: rx_iface_clk enable failed %d. disabling also tx_iface_clk\n", + __func__, ret); + goto out; + } + phy->is_iface_clk_enabled = true; + +out: + return ret; +} + +/* Turn OFF M-PHY RMMI interface clocks */ +void ufs_qcom_phy_disable_iface_clk(struct phy *generic_phy) +{ + struct ufs_qcom_phy *phy = get_ufs_qcom_phy(generic_phy); + + if (phy->is_iface_clk_enabled) { + clk_disable_unprepare(phy->tx_iface_clk); + clk_disable_unprepare(phy->rx_iface_clk); + phy->is_iface_clk_enabled = false; + } +} + +int ufs_qcom_phy_start_serdes(struct phy *generic_phy) +{ + struct ufs_qcom_phy *ufs_qcom_phy = get_ufs_qcom_phy(generic_phy); + int ret = 0; + + if (!ufs_qcom_phy->phy_spec_ops->start_serdes) { + dev_err(ufs_qcom_phy->dev, "%s: start_serdes() callback is not supported\n", + __func__); + ret = -ENOTSUPP; + } else { + ufs_qcom_phy->phy_spec_ops->start_serdes(ufs_qcom_phy); + } + + return ret; +} + +int ufs_qcom_phy_set_tx_lane_enable(struct phy *generic_phy, u32 tx_lanes) +{ + struct ufs_qcom_phy *ufs_qcom_phy = get_ufs_qcom_phy(generic_phy); + int ret = 0; + + if (!ufs_qcom_phy->phy_spec_ops->set_tx_lane_enable) { + dev_err(ufs_qcom_phy->dev, "%s: set_tx_lane_enable() callback is not supported\n", + __func__); + ret = -ENOTSUPP; + } else { + ufs_qcom_phy->phy_spec_ops->set_tx_lane_enable(ufs_qcom_phy, + tx_lanes); + } + + return ret; +} + +void ufs_qcom_phy_save_controller_version(struct phy *generic_phy, + u8 major, u16 minor, u16 step) +{ + struct ufs_qcom_phy *ufs_qcom_phy = get_ufs_qcom_phy(generic_phy); + + ufs_qcom_phy->host_ctrl_rev_major = major; + ufs_qcom_phy->host_ctrl_rev_minor = minor; + ufs_qcom_phy->host_ctrl_rev_step = step; +} + +int ufs_qcom_phy_calibrate_phy(struct phy *generic_phy, bool is_rate_B) +{ + struct ufs_qcom_phy *ufs_qcom_phy = get_ufs_qcom_phy(generic_phy); + int ret = 0; + + if (!ufs_qcom_phy->phy_spec_ops->calibrate_phy) { + dev_err(ufs_qcom_phy->dev, "%s: calibrate_phy() callback is not supported\n", + __func__); + ret = -ENOTSUPP; + } else { + ret = ufs_qcom_phy->phy_spec_ops-> + calibrate_phy(ufs_qcom_phy, is_rate_B); + if (ret) + dev_err(ufs_qcom_phy->dev, "%s: calibrate_phy() failed %d\n", + __func__, ret); + } + + return ret; +} + +int ufs_qcom_phy_remove(struct phy *generic_phy, + struct ufs_qcom_phy *ufs_qcom_phy) +{ + phy_power_off(generic_phy); + + kfree(ufs_qcom_phy->vdda_pll.name); + kfree(ufs_qcom_phy->vdda_phy.name); + + return 0; +} + +int ufs_qcom_phy_exit(struct phy *generic_phy) +{ + struct ufs_qcom_phy *ufs_qcom_phy = get_ufs_qcom_phy(generic_phy); + + if (ufs_qcom_phy->is_powered_on) + phy_power_off(generic_phy); + + return 0; +} + +int ufs_qcom_phy_is_pcs_ready(struct phy *generic_phy) +{ + struct ufs_qcom_phy *ufs_qcom_phy = get_ufs_qcom_phy(generic_phy); + + if (!ufs_qcom_phy->phy_spec_ops->is_physical_coding_sublayer_ready) { + dev_err(ufs_qcom_phy->dev, "%s: is_physical_coding_sublayer_ready() callback is not supported\n", + __func__); + return -ENOTSUPP; + } + + return ufs_qcom_phy->phy_spec_ops-> + is_physical_coding_sublayer_ready(ufs_qcom_phy); +} + +int ufs_qcom_phy_power_on(struct phy *generic_phy) +{ + struct ufs_qcom_phy *phy_common = get_ufs_qcom_phy(generic_phy); + struct device *dev = phy_common->dev; + int err; + + err = ufs_qcom_phy_enable_vreg(generic_phy, &phy_common->vdda_phy); + if (err) { + dev_err(dev, "%s enable vdda_phy failed, err=%d\n", + __func__, err); + goto out; + } + + phy_common->phy_spec_ops->power_control(phy_common, true); + + /* vdda_pll also enables ref clock LDOs so enable it first */ + err = ufs_qcom_phy_enable_vreg(generic_phy, &phy_common->vdda_pll); + if (err) { + dev_err(dev, "%s enable vdda_pll failed, err=%d\n", + __func__, err); + goto out_disable_phy; + } + + err = ufs_qcom_phy_enable_ref_clk(generic_phy); + if (err) { + dev_err(dev, "%s enable phy ref clock failed, err=%d\n", + __func__, err); + goto out_disable_pll; + } + + /* enable device PHY ref_clk pad rail */ + if (phy_common->vddp_ref_clk.reg) { + err = ufs_qcom_phy_enable_vreg(generic_phy, + &phy_common->vddp_ref_clk); + if (err) { + dev_err(dev, "%s enable vddp_ref_clk failed, err=%d\n", + __func__, err); + goto out_disable_ref_clk; + } + } + + phy_common->is_powered_on = true; + goto out; + +out_disable_ref_clk: + ufs_qcom_phy_disable_ref_clk(generic_phy); +out_disable_pll: + ufs_qcom_phy_disable_vreg(generic_phy, &phy_common->vdda_pll); +out_disable_phy: + ufs_qcom_phy_disable_vreg(generic_phy, &phy_common->vdda_phy); +out: + return err; +} + +int ufs_qcom_phy_power_off(struct phy *generic_phy) +{ + struct ufs_qcom_phy *phy_common = get_ufs_qcom_phy(generic_phy); + + phy_common->phy_spec_ops->power_control(phy_common, false); + + if (phy_common->vddp_ref_clk.reg) + ufs_qcom_phy_disable_vreg(generic_phy, + &phy_common->vddp_ref_clk); + ufs_qcom_phy_disable_ref_clk(generic_phy); + + ufs_qcom_phy_disable_vreg(generic_phy, &phy_common->vdda_pll); + ufs_qcom_phy_disable_vreg(generic_phy, &phy_common->vdda_phy); + phy_common->is_powered_on = false; + + return 0; +} diff --git a/drivers/phy/phy-rockchip-usb.c b/drivers/phy/phy-rockchip-usb.c new file mode 100644 index 000000000000..22011c3b6a4b --- /dev/null +++ b/drivers/phy/phy-rockchip-usb.c @@ -0,0 +1,158 @@ +/* + * Rockchip usb PHY driver + * + * Copyright (C) 2014 Yunzhi Li <[email protected]> + * Copyright (C) 2014 ROCKCHIP, Inc. + * + * 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 of the License. + * + * 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/clk.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/phy/phy.h> +#include <linux/platform_device.h> +#include <linux/regulator/consumer.h> +#include <linux/reset.h> +#include <linux/regmap.h> +#include <linux/mfd/syscon.h> + +/* + * The higher 16-bit of this register is used for write protection + * only if BIT(13 + 16) set to 1 the BIT(13) can be written. + */ +#define SIDDQ_WRITE_ENA BIT(29) +#define SIDDQ_ON BIT(13) +#define SIDDQ_OFF (0 << 13) + +struct rockchip_usb_phy { + unsigned int reg_offset; + struct regmap *reg_base; + struct clk *clk; + struct phy *phy; +}; + +static int rockchip_usb_phy_power(struct rockchip_usb_phy *phy, + bool siddq) +{ + return regmap_write(phy->reg_base, phy->reg_offset, + SIDDQ_WRITE_ENA | (siddq ? SIDDQ_ON : SIDDQ_OFF)); +} + +static int rockchip_usb_phy_power_off(struct phy *_phy) +{ + struct rockchip_usb_phy *phy = phy_get_drvdata(_phy); + int ret = 0; + + /* Power down usb phy analog blocks by set siddq 1 */ + ret = rockchip_usb_phy_power(phy, 1); + if (ret) + return ret; + + clk_disable_unprepare(phy->clk); + if (ret) + return ret; + + return 0; +} + +static int rockchip_usb_phy_power_on(struct phy *_phy) +{ + struct rockchip_usb_phy *phy = phy_get_drvdata(_phy); + int ret = 0; + + ret = clk_prepare_enable(phy->clk); + if (ret) + return ret; + + /* Power up usb phy analog blocks by set siddq 0 */ + ret = rockchip_usb_phy_power(phy, 0); + if (ret) + return ret; + + return 0; +} + +static struct phy_ops ops = { + .power_on = rockchip_usb_phy_power_on, + .power_off = rockchip_usb_phy_power_off, + .owner = THIS_MODULE, +}; + +static int rockchip_usb_phy_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct rockchip_usb_phy *rk_phy; + struct phy_provider *phy_provider; + struct device_node *child; + struct regmap *grf; + unsigned int reg_offset; + + grf = syscon_regmap_lookup_by_phandle(dev->of_node, "rockchip,grf"); + if (IS_ERR(grf)) { + dev_err(&pdev->dev, "Missing rockchip,grf property\n"); + return PTR_ERR(grf); + } + + for_each_available_child_of_node(dev->of_node, child) { + rk_phy = devm_kzalloc(dev, sizeof(*rk_phy), GFP_KERNEL); + if (!rk_phy) + return -ENOMEM; + + if (of_property_read_u32(child, "reg", ®_offset)) { + dev_err(dev, "missing reg property in node %s\n", + child->name); + return -EINVAL; + } + + rk_phy->reg_offset = reg_offset; + rk_phy->reg_base = grf; + + rk_phy->clk = of_clk_get_by_name(child, "phyclk"); + if (IS_ERR(rk_phy->clk)) + rk_phy->clk = NULL; + + rk_phy->phy = devm_phy_create(dev, child, &ops); + if (IS_ERR(rk_phy->phy)) { + dev_err(dev, "failed to create PHY\n"); + return PTR_ERR(rk_phy->phy); + } + phy_set_drvdata(rk_phy->phy, rk_phy); + } + + phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); + return PTR_ERR_OR_ZERO(phy_provider); +} + +static const struct of_device_id rockchip_usb_phy_dt_ids[] = { + { .compatible = "rockchip,rk3288-usb-phy" }, + {} +}; + +MODULE_DEVICE_TABLE(of, rockchip_usb_phy_dt_ids); + +static struct platform_driver rockchip_usb_driver = { + .probe = rockchip_usb_phy_probe, + .driver = { + .name = "rockchip-usb-phy", + .owner = THIS_MODULE, + .of_match_table = rockchip_usb_phy_dt_ids, + }, +}; + +module_platform_driver(rockchip_usb_driver); + +MODULE_AUTHOR("Yunzhi Li <[email protected]>"); +MODULE_DESCRIPTION("Rockchip USB 2.0 PHY driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/phy/phy-stih407-usb.c b/drivers/phy/phy-stih407-usb.c index 74f0fab3cd8a..1d5ae5f8ef69 100644 --- a/drivers/phy/phy-stih407-usb.c +++ b/drivers/phy/phy-stih407-usb.c @@ -22,6 +22,9 @@ #include <linux/mfd/syscon.h> #include <linux/phy/phy.h> +#define PHYPARAM_REG 1 +#define PHYCTRL_REG 2 + /* Default PHY_SEL and REFCLKSEL configuration */ #define STIH407_USB_PICOPHY_CTRL_PORT_CONF 0x6 #define STIH407_USB_PICOPHY_CTRL_PORT_MASK 0x1f @@ -93,7 +96,7 @@ static int stih407_usb2_picophy_probe(struct platform_device *pdev) struct device_node *np = dev->of_node; struct phy_provider *phy_provider; struct phy *phy; - struct resource *res; + int ret; phy_dev = devm_kzalloc(dev, sizeof(*phy_dev), GFP_KERNEL); if (!phy_dev) @@ -123,19 +126,19 @@ static int stih407_usb2_picophy_probe(struct platform_device *pdev) return PTR_ERR(phy_dev->regmap); } - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ctrl"); - if (!res) { - dev_err(dev, "No ctrl reg found\n"); - return -ENXIO; + ret = of_property_read_u32_index(np, "st,syscfg", PHYPARAM_REG, + &phy_dev->param); + if (ret) { + dev_err(dev, "can't get phyparam offset (%d)\n", ret); + return ret; } - phy_dev->ctrl = res->start; - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "param"); - if (!res) { - dev_err(dev, "No param reg found\n"); - return -ENXIO; + ret = of_property_read_u32_index(np, "st,syscfg", PHYCTRL_REG, + &phy_dev->ctrl); + if (ret) { + dev_err(dev, "can't get phyctrl offset (%d)\n", ret); + return ret; } - phy_dev->param = res->start; phy = devm_phy_create(dev, NULL, &stih407_usb2_picophy_data); if (IS_ERR(phy)) { diff --git a/drivers/phy/phy-ti-pipe3.c b/drivers/phy/phy-ti-pipe3.c index 465de2c800f2..95c88f929f27 100644 --- a/drivers/phy/phy-ti-pipe3.c +++ b/drivers/phy/phy-ti-pipe3.c @@ -28,6 +28,7 @@ #include <linux/delay.h> #include <linux/phy/omap_control_phy.h> #include <linux/of_platform.h> +#include <linux/spinlock.h> #define PLL_STATUS 0x00000004 #define PLL_GO 0x00000008 @@ -82,6 +83,10 @@ struct ti_pipe3 { struct clk *refclk; struct clk *div_clk; struct pipe3_dpll_map *dpll_map; + bool enabled; + spinlock_t lock; /* serialize clock enable/disable */ + /* the below flag is needed specifically for SATA */ + bool refclk_enabled; }; static struct pipe3_dpll_map dpll_map_usb[] = { @@ -307,6 +312,7 @@ static int ti_pipe3_probe(struct platform_device *pdev) return -ENOMEM; phy->dev = &pdev->dev; + spin_lock_init(&phy->lock); if (!of_device_is_compatible(node, "ti,phy-pipe3-pcie")) { match = of_match_device(of_match_ptr(ti_pipe3_id_table), @@ -333,21 +339,24 @@ static int ti_pipe3_probe(struct platform_device *pdev) } } + phy->refclk = devm_clk_get(phy->dev, "refclk"); + if (IS_ERR(phy->refclk)) { + dev_err(&pdev->dev, "unable to get refclk\n"); + /* older DTBs have missing refclk in SATA PHY + * so don't bail out in case of SATA PHY. + */ + if (!of_device_is_compatible(node, "ti,phy-pipe3-sata")) + return PTR_ERR(phy->refclk); + } + if (!of_device_is_compatible(node, "ti,phy-pipe3-sata")) { phy->wkupclk = devm_clk_get(phy->dev, "wkupclk"); if (IS_ERR(phy->wkupclk)) { dev_err(&pdev->dev, "unable to get wkupclk\n"); return PTR_ERR(phy->wkupclk); } - - phy->refclk = devm_clk_get(phy->dev, "refclk"); - if (IS_ERR(phy->refclk)) { - dev_err(&pdev->dev, "unable to get refclk\n"); - return PTR_ERR(phy->refclk); - } } else { phy->wkupclk = ERR_PTR(-ENODEV); - phy->refclk = ERR_PTR(-ENODEV); } if (of_device_is_compatible(node, "ti,phy-pipe3-pcie")) { @@ -426,33 +435,42 @@ static int ti_pipe3_remove(struct platform_device *pdev) } #ifdef CONFIG_PM - -static int ti_pipe3_runtime_suspend(struct device *dev) +static int ti_pipe3_enable_refclk(struct ti_pipe3 *phy) { - struct ti_pipe3 *phy = dev_get_drvdata(dev); + if (!IS_ERR(phy->refclk) && !phy->refclk_enabled) { + int ret; - if (!IS_ERR(phy->wkupclk)) - clk_disable_unprepare(phy->wkupclk); + ret = clk_prepare_enable(phy->refclk); + if (ret) { + dev_err(phy->dev, "Failed to enable refclk %d\n", ret); + return ret; + } + phy->refclk_enabled = true; + } + + return 0; +} + +static void ti_pipe3_disable_refclk(struct ti_pipe3 *phy) +{ if (!IS_ERR(phy->refclk)) clk_disable_unprepare(phy->refclk); - if (!IS_ERR(phy->div_clk)) - clk_disable_unprepare(phy->div_clk); - return 0; + phy->refclk_enabled = false; } -static int ti_pipe3_runtime_resume(struct device *dev) +static int ti_pipe3_enable_clocks(struct ti_pipe3 *phy) { - u32 ret = 0; - struct ti_pipe3 *phy = dev_get_drvdata(dev); + int ret = 0; + unsigned long flags; - if (!IS_ERR(phy->refclk)) { - ret = clk_prepare_enable(phy->refclk); - if (ret) { - dev_err(phy->dev, "Failed to enable refclk %d\n", ret); - goto err1; - } - } + spin_lock_irqsave(&phy->lock, flags); + if (phy->enabled) + goto err1; + + ret = ti_pipe3_enable_refclk(phy); + if (ret) + goto err1; if (!IS_ERR(phy->wkupclk)) { ret = clk_prepare_enable(phy->wkupclk); @@ -469,6 +487,9 @@ static int ti_pipe3_runtime_resume(struct device *dev) goto err3; } } + + phy->enabled = true; + spin_unlock_irqrestore(&phy->lock, flags); return 0; err3: @@ -479,20 +500,80 @@ err2: if (!IS_ERR(phy->refclk)) clk_disable_unprepare(phy->refclk); + ti_pipe3_disable_refclk(phy); err1: + spin_unlock_irqrestore(&phy->lock, flags); return ret; } +static void ti_pipe3_disable_clocks(struct ti_pipe3 *phy) +{ + unsigned long flags; + + spin_lock_irqsave(&phy->lock, flags); + if (!phy->enabled) { + spin_unlock_irqrestore(&phy->lock, flags); + return; + } + + if (!IS_ERR(phy->wkupclk)) + clk_disable_unprepare(phy->wkupclk); + /* Don't disable refclk for SATA PHY due to Errata i783 */ + if (!of_device_is_compatible(phy->dev->of_node, "ti,phy-pipe3-sata")) + ti_pipe3_disable_refclk(phy); + if (!IS_ERR(phy->div_clk)) + clk_disable_unprepare(phy->div_clk); + phy->enabled = false; + spin_unlock_irqrestore(&phy->lock, flags); +} + +static int ti_pipe3_runtime_suspend(struct device *dev) +{ + struct ti_pipe3 *phy = dev_get_drvdata(dev); + + ti_pipe3_disable_clocks(phy); + return 0; +} + +static int ti_pipe3_runtime_resume(struct device *dev) +{ + struct ti_pipe3 *phy = dev_get_drvdata(dev); + int ret = 0; + + ret = ti_pipe3_enable_clocks(phy); + return ret; +} + +static int ti_pipe3_suspend(struct device *dev) +{ + struct ti_pipe3 *phy = dev_get_drvdata(dev); + + ti_pipe3_disable_clocks(phy); + return 0; +} + +static int ti_pipe3_resume(struct device *dev) +{ + struct ti_pipe3 *phy = dev_get_drvdata(dev); + int ret; + + ret = ti_pipe3_enable_clocks(phy); + if (ret) + return ret; + + pm_runtime_disable(dev); + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + return 0; +} +#endif + static const struct dev_pm_ops ti_pipe3_pm_ops = { SET_RUNTIME_PM_OPS(ti_pipe3_runtime_suspend, ti_pipe3_runtime_resume, NULL) + SET_SYSTEM_SLEEP_PM_OPS(ti_pipe3_suspend, ti_pipe3_resume) }; -#define DEV_PM_OPS (&ti_pipe3_pm_ops) -#else -#define DEV_PM_OPS NULL -#endif - #ifdef CONFIG_OF static const struct of_device_id ti_pipe3_id_table[] = { { @@ -520,7 +601,7 @@ static struct platform_driver ti_pipe3_driver = { .remove = ti_pipe3_remove, .driver = { .name = "ti-pipe3", - .pm = DEV_PM_OPS, + .pm = &ti_pipe3_pm_ops, .of_match_table = of_match_ptr(ti_pipe3_id_table), }, }; |