| Message ID | 1409758637-28654-4-git-send-email-gabriel.fernandez@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi, On Wednesday 03 September 2014 09:07 PM, Gabriel FERNANDEZ wrote: > The MiPHY28lp is a Generic PHY which can serve various SATA or PCIe > or USB3 devices. > > Signed-off-by: alexandre torgue <alexandre.torgue@st.com> > Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> > Signed-off-by: Gabriel Fernandez <gabriel.fernandez@linaro.org> > --- > drivers/phy/Kconfig | 8 + > drivers/phy/Makefile | 1 + > drivers/phy/phy-miphy28lp.c | 985 ++++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 994 insertions(+) > create mode 100644 drivers/phy/phy-miphy28lp.c > > diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig > index 0dd7427..2053f72 100644 > --- a/drivers/phy/Kconfig > +++ b/drivers/phy/Kconfig > @@ -230,4 +230,12 @@ config PHY_XGENE > help > This option enables support for APM X-Gene SoC multi-purpose PHY. > > +config PHY_MIPHY28LP > + tristate "STMicroelectronics MIPHY28LP PHY driver for STiH407" > + depends on ARCH_STI > + depends on GENERIC_PHY Select GENERIC_PHY so that it's same as other PHY drivers. > + help > + Enable this to support the miphy transceiver (for SATA/PCIE/USB3) > + that is part of STMicroelectronics STiH407 SoC. > + > endmenu > diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile > index 95c69ed..f7e7c59 100644 > --- a/drivers/phy/Makefile > +++ b/drivers/phy/Makefile > @@ -8,6 +8,7 @@ obj-$(CONFIG_BCM_KONA_USB2_PHY) += phy-bcm-kona-usb2.o > obj-$(CONFIG_PHY_EXYNOS_DP_VIDEO) += phy-exynos-dp-video.o > obj-$(CONFIG_PHY_EXYNOS_MIPI_VIDEO) += phy-exynos-mipi-video.o > obj-$(CONFIG_PHY_MVEBU_SATA) += phy-mvebu-sata.o > +obj-$(CONFIG_PHY_MIPHY28LP) += phy-miphy28lp.o > obj-$(CONFIG_PHY_MIPHY365X) += phy-miphy365x.o > obj-$(CONFIG_OMAP_CONTROL_PHY) += phy-omap-control.o > obj-$(CONFIG_OMAP_USB2) += phy-omap-usb2.o > diff --git a/drivers/phy/phy-miphy28lp.c b/drivers/phy/phy-miphy28lp.c > new file mode 100644 > index 0000000..aa36cea > --- /dev/null > +++ b/drivers/phy/phy-miphy28lp.c > @@ -0,0 +1,985 @@ > +/* > + * Copyright (C) 2014 STMicroelectronics > + * > + * STMicroelectronics PHY driver MiPHY28lp (for SoC STiH407). > + * > + * Author: Alexandre Torgue <alexandre.torgue@st.com> > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2, as > + * published by the Free Software Foundation. > + * > + */ > + > +#include <linux/platform_device.h> > +#include <linux/io.h> > +#include <linux/kernel.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/of_platform.h> > +#include <linux/of_address.h> > +#include <linux/clk.h> > +#include <linux/phy/phy.h> > +#include <linux/delay.h> > +#include <linux/mfd/syscon.h> > +#include <linux/regmap.h> > +#include <linux/reset.h> > + > +#include <dt-bindings/phy/phy-miphy.h> > + > +/* MiPHY mask registers */ > +#define MIPHY_PHY_RDY 0x01 > +#define MIPHY_PLL_HFC_RDY 0x06 > +#define MIPHY_COMP_DONE 0x80 > + > +#define MIPHY_PX_RX_POL BIT(5) > + > +/* MiPHY registers */ > +#define MIPHY_CONF_RESET 0x00 > +#define MIPHY_RESET 0x01 > +#define MIPHY_STATUS_1 0x02 > +#define MIPHY_CONTROL 0x04 > +#define MIPHY_BOUNDARY_SEL 0x0a > +#define MIPHY_BOUNDARY_1 0x0b > +#define MIPHY_BOUNDARY_2 0x0c > +#define MIPHY_PLL_CLKREF_FREQ 0x0d > +#define MIPHY_SPEED 0x0e > +#define MIPHY_CONF 0x0f > +#define MIPHY_CTRL_TEST_SEL 0x20 > +#define MIPHY_CTRL_TEST_1 0x21 > +#define MIPHY_CTRL_TEST_2 0x22 > +#define MIPHY_CTRL_TEST_3 0x23 > +#define MIPHY_CTRL_TEST_4 0x24 > +#define MIPHY_FEEDBACK_TEST 0x25 > +#define MIPHY_DEBUG_BUS 0x26 > +#define MIPHY_DEBUG_STATUS_MSB 0x27 > +#define MIPHY_DEBUG_STATUS_LSB 0x28 > +#define MIPHY_PWR_RAIL_1 0x29 > +#define MIPHY_PWR_RAIL_2 0x2a > +#define MIPHY_SYNCHAR_CONTROL 0x30 > +#define MIPHY_COMP_FSM_1 0x3a > +#define MIPHY_COMP_FSM_6 0x3f > +#define MIPHY_COMP_POSTP 0x42 > +#define MIPHY_TX_CTRL_1 0x49 > +#define MIPHY_TX_CTRL_2 0x4a > +#define MIPHY_TX_CTRL_3 0x4b > +#define MIPHY_TX_CAL_MAN 0x4e > +#define MIPHY_TST_BIAS_BOOST_2 0x62 > +#define MIPHY_BIAS_BOOST_1 0x63 > +#define MIPHY_BIAS_BOOST_2 0x64 > +#define MIPHY_RX_DESBUFF_FDB_2 0x67 > +#define MIPHY_RX_DESBUFF_FDB_3 0x68 > +#define MIPHY_SIGDET_COMPENS1 0x69 > +#define MIPHY_SIGDET_COMPENS2 0x6a > +#define MIPHY_JITTER_PERIOD 0x6b > +#define MIPHY_JITTER_AMPLITUDE_1 0x6c > +#define MIPHY_JITTER_AMPLITUDE_2 0x6d > +#define MIPHY_JITTER_AMPLITUDE_3 0x6e > +#define MIPHY_RX_K_GAIN 0x78 > +#define MIPHY_RX_BUFFER_CTRL 0x7a > +#define MIPHY_RX_VGA_GAIN 0x7b > +#define MIPHY_RX_EQU_GAIN_1 0x7f > +#define MIPHY_RX_EQU_GAIN_2 0x80 > +#define MIPHY_RX_EQU_GAIN_3 0x81 > +#define MIPHY_RX_CAL_CTRL_1 0x97 > +#define MIPHY_RX_CAL_CTRL_2 0x98 > +#define MIPHY_RX_CAL_OFFSET_CTRL 0x99 > +#define MIPHY_RX_CAL_VGA_STEP 0x9a > +#define MIPHY_RX_CAL_EYE_MIN 0x9d > +#define MIPHY_RX_CAL_OPT_LENGTH 0x9f > +#define MIPHY_RX_LOCK_CTRL_1 0xc1 > +#define MIPHY_RX_LOCK_SETTINGS_OPT 0xc2 > +#define MIPHY_RX_LOCK_STEP 0xc4 > +#define MIPHY_RX_SIGDET_SLEEP_OA 0xc9 > +#define MIPHY_RX_SIGDET_SLEEP_SEL 0xca > +#define MIPHY_RX_SIGDET_WAIT_SEL 0xcb > +#define MIPHY_RX_SIGDET_DATA_SEL 0xcc > +#define MIPHY_RX_POWER_CTRL_1 0xcd > +#define MIPHY_RX_POWER_CTRL_2 0xce > +#define MIPHY_PLL_CALSET_CTRL 0xd3 > +#define MIPHY_PLL_CALSET_1 0xd4 > +#define MIPHY_PLL_CALSET_2 0xd5 > +#define MIPHY_PLL_CALSET_3 0xd6 > +#define MIPHY_PLL_CALSET_4 0xd7 > +#define MIPHY_PLL_SBR_1 0xe3 > +#define MIPHY_PLL_SBR_2 0xe4 > +#define MIPHY_PLL_SBR_3 0xe5 > +#define MIPHY_PLL_SBR_4 0xe6 > +#define MIPHY_PLL_COMMON_MISC_2 0xe9 > +#define MIPHY_PLL_SPAREIN 0xeb > + > +/* > + * On STiH407 the glue logic can be different among MiPHY devices; for example: > + * MiPHY0: OSC_FORCE_EXT means: > + * 0: 30MHz crystal clk - 1: 100MHz ext clk routed through MiPHY1 > + * MiPHY1: OSC_FORCE_EXT means: > + * 1: 30MHz crystal clk - 0: 100MHz ext clk routed through MiPHY1 > + * Some devices have not the possibility to check if the osc is ready. > + */ > +#define MIPHY_OSC_FORCE_EXT BIT(3) > +#define MIPHY_OSC_RDY BIT(5) > + > +#define MIPHY_CTRL_MASK 0x0f > +#define MIPHY_CTRL_DEFAULT 0 > +#define MIPHY_CTRL_SYNC_D_EN BIT(2) > + > +/* SATA / PCIe defines */ > +#define SATA_CTRL_MASK 0x07 > +#define PCIE_CTRL_MASK 0xff > +#define SATA_CTRL_SELECT_SATA 1 > +#define SATA_CTRL_SELECT_PCIE 0 > +#define SYSCFG_PCIE_PCIE_VAL 0x80 > +#define SATA_SPDMODE 1 > + > +struct miphy28lp_phy { > + struct phy *phy; > + struct miphy28lp_dev *phydev; > + void __iomem *base; > + void __iomem *pipebase; > + > + bool osc_force_ext; > + bool osc_rdy; > + bool px_rx_pol_inv; > + > + struct reset_control *miphy_rst; > + > + u32 sata_gen; > + > + /* Sysconfig registers offsets needed to configure the device */ > + u32 syscfg_miphy_ctrl; > + u32 syscfg_miphy_status; > + u32 syscfg_pci; > + u32 syscfg_sata; > + u8 type; > +}; > + > +struct miphy28lp_dev { > + struct device *dev; > + struct regmap *regmap; > + struct mutex miphy_mutex; > + struct miphy28lp_phy **phys; > +}; > + > +struct miphy_initval { > + u16 reg; > + u16 val; > +}; > + > +enum miphy_sata_gen { SATA_GEN1, SATA_GEN2, SATA_GEN3 }; > + > +static char *miphy_type_name[] = { "sata-up", "pcie-up", "usb3-up" }; > + > +static inline void miphy28lp_cfg_out_of_reset(struct miphy28lp_phy *miphy_phy) > +{ > + unsigned long finish = jiffies + 5 * HZ; > + u8 mask = MIPHY_PLL_HFC_RDY; > + u8 val; > + > + do { > + val = readb_relaxed(miphy_phy->base + MIPHY_STATUS_1); > + if ((val & mask) != mask) > + cpu_relax(); > + else > + break; > + } while (!time_after_eq(jiffies, finish)); > +} > + > +static inline void miphy28lp_configure_reset(struct miphy28lp_phy *miphy_phy) > +{ > + void *base = miphy_phy->base; > + > + /* Putting Macro in reset */ > + writeb_relaxed(0x01, base + MIPHY_CONF_RESET); > + writeb_relaxed(0x03, base + MIPHY_CONF_RESET); > + > + /* Wait for a while */ > + usleep_range(10, 20); /* extra delay after resetting */ How was this delay value derived? If the HW spec says so, it would be better to document it here. Applicable for all the delays added in this patch. > +} > + > + > + > +static inline void miphy28lp_configure_sata(struct miphy28lp_phy *miphy_phy) > +{ > + void __iomem *base = miphy_phy->base; > + > + /* Putting Macro in reset */ > + writeb_relaxed(0x01, base + MIPHY_CONF_RESET); > + writeb_relaxed(0x03, base + MIPHY_CONF_RESET); > + > + /* Wait for a while */ > + usleep_range(10, 20); /* extra delay after resetting */ You already have a function miphy28lp_configure_reset doing the same no? > + > + /* Bringing the MIPHY-CPU registers out of reset */ > + writeb_relaxed(0x1c, base + MIPHY_CONTROL); > + > + /* Applying PLL Settings */ > + writeb_relaxed(0x1d, base + MIPHY_PLL_SPAREIN); > + writeb_relaxed(0x1e, base + MIPHY_PLL_CLKREF_FREQ); > + > + /* PLL Ratio */ > + writeb_relaxed(0xc8, base + MIPHY_PLL_CALSET_1); > + writeb_relaxed(0x00, base + MIPHY_PLL_CALSET_2); > + writeb_relaxed(0x00, base + MIPHY_PLL_CALSET_3); > + writeb_relaxed(0x00, base + MIPHY_PLL_CALSET_4); > + > + /* Number of PLL Calibrations */ > + writeb_relaxed(0x00, base + MIPHY_PLL_CALSET_CTRL); > + > + /* Unbanked Settings */ > + writeb_relaxed(0xd1, base + MIPHY_TX_CAL_MAN); > + writeb_relaxed(0x1f, base + MIPHY_RX_CAL_OFFSET_CTRL); > + writeb_relaxed(0x40, base + MIPHY_BOUNDARY_SEL); > + > + /* Banked settings */ > + /* Gen 1 */ > + writeb_relaxed(0x00, base + MIPHY_CONF); > + writeb_relaxed(0x00, base + MIPHY_SPEED); > + writeb_relaxed(0x00, base + MIPHY_BIAS_BOOST_1); Aren't the 0's default reset values? Can we do only the bare minimal settings required to get this PHY functions. > + writeb_relaxed(0xae, base + MIPHY_BIAS_BOOST_2); > + > + /* TX buffer Settings */ > + writeb_relaxed(0x53, base + MIPHY_TX_CTRL_2); > + writeb_relaxed(0x00, base + MIPHY_TX_CTRL_3); > + > + /* RX Buffer Settings */ > + writeb_relaxed(0x0d, base + MIPHY_RX_BUFFER_CTRL); > + writeb_relaxed(0x7d, base + MIPHY_RX_EQU_GAIN_1); > + writeb_relaxed(0x56, base + MIPHY_RX_EQU_GAIN_2); > + writeb_relaxed(0x00, base + MIPHY_RX_EQU_GAIN_3); > + writeb_relaxed(0x00, base + MIPHY_RX_VGA_GAIN); > + > + /* Gen 2 */ > + writeb_relaxed(0x01, base + MIPHY_CONF); > + writeb_relaxed(0x05, base + MIPHY_SPEED); > + writeb_relaxed(0x00, base + MIPHY_BIAS_BOOST_1); > + writeb_relaxed(0xae, base + MIPHY_BIAS_BOOST_2); > + > + /* TX buffer Settings */ > + writeb_relaxed(0x72, base + MIPHY_TX_CTRL_2); > + writeb_relaxed(0x20, base + MIPHY_TX_CTRL_3); > + > + /* RX Buffer Settings */ > + writeb_relaxed(0x0d, base + MIPHY_RX_BUFFER_CTRL); > + writeb_relaxed(0x7d, base + MIPHY_RX_EQU_GAIN_1); > + writeb_relaxed(0x56, base + MIPHY_RX_EQU_GAIN_2); > + writeb_relaxed(0x00, base + MIPHY_RX_EQU_GAIN_3); > + writeb_relaxed(0x00, base + MIPHY_RX_VGA_GAIN); > + > + /* Gen 3 */ > + writeb_relaxed(0x02, base + MIPHY_CONF); > + writeb_relaxed(0x0a, base + MIPHY_SPEED); > + writeb_relaxed(0x00, base + MIPHY_BIAS_BOOST_1); > + writeb_relaxed(0xae, base + MIPHY_BIAS_BOOST_2); > + > + /* TX buffer Settings */ > + writeb_relaxed(0xc0, base + MIPHY_TX_CTRL_2); > + writeb_relaxed(0x20, base + MIPHY_TX_CTRL_3); > + > + /* RX Buffer Settings */ > + writeb_relaxed(0x0d, base + MIPHY_RX_BUFFER_CTRL); > + writeb_relaxed(0x7d, base + MIPHY_RX_EQU_GAIN_1); > + writeb_relaxed(0x56, base + MIPHY_RX_EQU_GAIN_2); > + writeb_relaxed(0x00, base + MIPHY_RX_EQU_GAIN_3); > + writeb_relaxed(0x00, base + MIPHY_RX_VGA_GAIN); > + > + /* Power control */ > + writeb_relaxed(0x21, base + MIPHY_RX_POWER_CTRL_1); > + > + /* Macro out of reset */ > + writeb_relaxed(0x00, base + MIPHY_CONF_RESET); > + > + /* Poll for HFC ready after reset release */ > + /* Compensation measurement */ > + writeb_relaxed(0x05, base + MIPHY_RESET); > + writeb_relaxed(0x00, base + MIPHY_PLL_COMMON_MISC_2); > + writeb_relaxed(0x40, base + MIPHY_COMP_FSM_1); > + writeb_relaxed(0x00, base + MIPHY_RESET); > + writeb_relaxed(0x40, base + MIPHY_PLL_COMMON_MISC_2); This function can be split into separate smaller functions and can be resued for pcie and usb3. > +} > + > +static inline void miphy28lp_configure_pcie(struct miphy28lp_phy *miphy_phy) > +{ > + void __iomem *base = miphy_phy->base; > + > + /* Putting Macro in reset */ > + writeb_relaxed(0x01, base + MIPHY_CONF_RESET); > + writeb_relaxed(0x03, base + MIPHY_CONF_RESET); > + > + /* Wait for a while */ > + usleep_range(10, 20); /* extra delay after resetting */ > + > + /* Bringing the MIPHY-CPU registers out of reset */ > + writeb_relaxed(0x01, base + MIPHY_CONF_RESET); > + writeb_relaxed(0x14, base + MIPHY_CONTROL); > + writeb_relaxed(0x1d, base + MIPHY_PLL_SPAREIN); > + > + /* Applying PLL Settings */ > + writeb_relaxed(0x1e, base + MIPHY_PLL_CLKREF_FREQ); > + > + /* PLL Ratio */ > + writeb_relaxed(0xa6, base + MIPHY_PLL_CALSET_1); > + writeb_relaxed(0xaa, base + MIPHY_PLL_CALSET_2); > + writeb_relaxed(0xaa, base + MIPHY_PLL_CALSET_3); > + writeb_relaxed(0x00, base + MIPHY_PLL_CALSET_4); > + writeb_relaxed(0x00, base + MIPHY_PLL_CALSET_CTRL); > + > + writeb_relaxed(0xd1, base + MIPHY_TX_CAL_MAN); > + writeb_relaxed(0x5f, base + MIPHY_RX_CAL_OFFSET_CTRL); > + writeb_relaxed(0x40, base + MIPHY_BOUNDARY_SEL); > + > + /* Banked settings */ > + /* Gen 1 */ > + writeb_relaxed(0x00, base + MIPHY_CONF); > + > + writeb_relaxed(0x05, base + MIPHY_SPEED); > + writeb_relaxed(0x00, base + MIPHY_BIAS_BOOST_1); > + writeb_relaxed(0xa5, base + MIPHY_BIAS_BOOST_2); > + > + /* TX buffer Settings */ > + writeb_relaxed(0x07, base + MIPHY_TX_CTRL_1); > + writeb_relaxed(0x71, base + MIPHY_TX_CTRL_2); > + writeb_relaxed(0x60, base + MIPHY_TX_CTRL_3); > + writeb_relaxed(0x98, base + MIPHY_RX_K_GAIN); > + > + /* RX Buffer Settings */ > + writeb_relaxed(0x0d, base + MIPHY_RX_BUFFER_CTRL); > + writeb_relaxed(0x00, base + MIPHY_RX_VGA_GAIN); > + writeb_relaxed(0x79, base + MIPHY_RX_EQU_GAIN_1); > + writeb_relaxed(0x56, base + MIPHY_RX_EQU_GAIN_2); > + > + /* Gen 2 */ > + writeb_relaxed(0x01, base + MIPHY_CONF); > + writeb_relaxed(0x0a, base + MIPHY_SPEED); > + writeb_relaxed(0x00, base + MIPHY_BIAS_BOOST_1); > + writeb_relaxed(0xa5, base + MIPHY_BIAS_BOOST_2); > + > + /* TX buffer Settings */ > + writeb_relaxed(0x07, base + MIPHY_TX_CTRL_1); > + writeb_relaxed(0x70, base + MIPHY_TX_CTRL_2); > + writeb_relaxed(0x60, base + MIPHY_TX_CTRL_3); > + writeb_relaxed(0xcc, base + MIPHY_RX_K_GAIN); > + > + /* RX Buffer Settings */ > + writeb_relaxed(0x0d, base + MIPHY_RX_BUFFER_CTRL); > + writeb_relaxed(0x00, base + MIPHY_RX_VGA_GAIN); > + writeb_relaxed(0x78, base + MIPHY_RX_EQU_GAIN_1); > + writeb_relaxed(0x07, base + MIPHY_RX_EQU_GAIN_2); > + > + writeb_relaxed(0x21, base + MIPHY_RX_POWER_CTRL_1); > + > + /* Macro out of reset */ > + writeb_relaxed(0x00, base + MIPHY_CONF_RESET); > + > + /* Poll for HFC ready after reset release */ > + /* Compensation measurement */ > + writeb_relaxed(0x05, base + MIPHY_RESET); > + writeb_relaxed(0x00, base + MIPHY_PLL_COMMON_MISC_2); > + writeb_relaxed(0x1e, base + MIPHY_PLL_CLKREF_FREQ); > + writeb_relaxed(0x40, base + MIPHY_COMP_FSM_1); > + > + /* extra delay to wait pll lock */ > + usleep_range(100, 120); > + > + writeb_relaxed(0x01, base + MIPHY_RESET); > + writeb_relaxed(0x00, base + MIPHY_RESET); > + writeb_relaxed(0x40, base + MIPHY_PLL_COMMON_MISC_2); > + writeb_relaxed(0x02, base + MIPHY_PLL_SBR_1); Are all these settings necessary? Can't we have a bare minimal settings needed to get the PHY functional. Thanks Kishon
Hi Kishon, Thanks for reviewing. BR Gabriel On 8 September 2014 17:12, Kishon Vijay Abraham I <kishon@ti.com> wrote: > Hi, > > On Wednesday 03 September 2014 09:07 PM, Gabriel FERNANDEZ wrote: >> The MiPHY28lp is a Generic PHY which can serve various SATA or PCIe >> or USB3 devices. >> >> Signed-off-by: alexandre torgue <alexandre.torgue@st.com> >> Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> >> Signed-off-by: Gabriel Fernandez <gabriel.fernandez@linaro.org> >> --- >> drivers/phy/Kconfig | 8 + >> drivers/phy/Makefile | 1 + >> drivers/phy/phy-miphy28lp.c | 985 ++++++++++++++++++++++++++++++++++++++++++++ >> 3 files changed, 994 insertions(+) >> create mode 100644 drivers/phy/phy-miphy28lp.c >> >> diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig >> index 0dd7427..2053f72 100644 >> --- a/drivers/phy/Kconfig >> +++ b/drivers/phy/Kconfig >> @@ -230,4 +230,12 @@ config PHY_XGENE >> help >> This option enables support for APM X-Gene SoC multi-purpose PHY. >> >> +config PHY_MIPHY28LP >> + tristate "STMicroelectronics MIPHY28LP PHY driver for STiH407" >> + depends on ARCH_STI >> + depends on GENERIC_PHY > > Select GENERIC_PHY so that it's same as other PHY drivers. Ok >> + help >> + Enable this to support the miphy transceiver (for SATA/PCIE/USB3) >> + that is part of STMicroelectronics STiH407 SoC. >> + >> endmenu >> diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile >> index 95c69ed..f7e7c59 100644 >> --- a/drivers/phy/Makefile >> +++ b/drivers/phy/Makefile >> @@ -8,6 +8,7 @@ obj-$(CONFIG_BCM_KONA_USB2_PHY) += phy-bcm-kona-usb2.o >> obj-$(CONFIG_PHY_EXYNOS_DP_VIDEO) += phy-exynos-dp-video.o >> obj-$(CONFIG_PHY_EXYNOS_MIPI_VIDEO) += phy-exynos-mipi-video.o >> obj-$(CONFIG_PHY_MVEBU_SATA) += phy-mvebu-sata.o >> +obj-$(CONFIG_PHY_MIPHY28LP) += phy-miphy28lp.o >> obj-$(CONFIG_PHY_MIPHY365X) += phy-miphy365x.o >> obj-$(CONFIG_OMAP_CONTROL_PHY) += phy-omap-control.o >> obj-$(CONFIG_OMAP_USB2) += phy-omap-usb2.o >> diff --git a/drivers/phy/phy-miphy28lp.c b/drivers/phy/phy-miphy28lp.c >> new file mode 100644 >> index 0000000..aa36cea >> --- /dev/null >> +++ b/drivers/phy/phy-miphy28lp.c >> @@ -0,0 +1,985 @@ >> +/* >> + * Copyright (C) 2014 STMicroelectronics >> + * >> + * STMicroelectronics PHY driver MiPHY28lp (for SoC STiH407). >> + * >> + * Author: Alexandre Torgue <alexandre.torgue@st.com> >> + * >> + * This program is free software; you can redistribute it and/or modify >> + * it under the terms of the GNU General Public License version 2, as >> + * published by the Free Software Foundation. >> + * >> + */ >> + >> +#include <linux/platform_device.h> >> +#include <linux/io.h> >> +#include <linux/kernel.h> >> +#include <linux/module.h> >> +#include <linux/of.h> >> +#include <linux/of_platform.h> >> +#include <linux/of_address.h> >> +#include <linux/clk.h> >> +#include <linux/phy/phy.h> >> +#include <linux/delay.h> >> +#include <linux/mfd/syscon.h> >> +#include <linux/regmap.h> >> +#include <linux/reset.h> >> + >> +#include <dt-bindings/phy/phy-miphy.h> >> + >> +/* MiPHY mask registers */ >> +#define MIPHY_PHY_RDY 0x01 >> +#define MIPHY_PLL_HFC_RDY 0x06 >> +#define MIPHY_COMP_DONE 0x80 >> + >> +#define MIPHY_PX_RX_POL BIT(5) >> + >> +/* MiPHY registers */ >> +#define MIPHY_CONF_RESET 0x00 >> +#define MIPHY_RESET 0x01 >> +#define MIPHY_STATUS_1 0x02 >> +#define MIPHY_CONTROL 0x04 >> +#define MIPHY_BOUNDARY_SEL 0x0a >> +#define MIPHY_BOUNDARY_1 0x0b >> +#define MIPHY_BOUNDARY_2 0x0c >> +#define MIPHY_PLL_CLKREF_FREQ 0x0d >> +#define MIPHY_SPEED 0x0e >> +#define MIPHY_CONF 0x0f >> +#define MIPHY_CTRL_TEST_SEL 0x20 >> +#define MIPHY_CTRL_TEST_1 0x21 >> +#define MIPHY_CTRL_TEST_2 0x22 >> +#define MIPHY_CTRL_TEST_3 0x23 >> +#define MIPHY_CTRL_TEST_4 0x24 >> +#define MIPHY_FEEDBACK_TEST 0x25 >> +#define MIPHY_DEBUG_BUS 0x26 >> +#define MIPHY_DEBUG_STATUS_MSB 0x27 >> +#define MIPHY_DEBUG_STATUS_LSB 0x28 >> +#define MIPHY_PWR_RAIL_1 0x29 >> +#define MIPHY_PWR_RAIL_2 0x2a >> +#define MIPHY_SYNCHAR_CONTROL 0x30 >> +#define MIPHY_COMP_FSM_1 0x3a >> +#define MIPHY_COMP_FSM_6 0x3f >> +#define MIPHY_COMP_POSTP 0x42 >> +#define MIPHY_TX_CTRL_1 0x49 >> +#define MIPHY_TX_CTRL_2 0x4a >> +#define MIPHY_TX_CTRL_3 0x4b >> +#define MIPHY_TX_CAL_MAN 0x4e >> +#define MIPHY_TST_BIAS_BOOST_2 0x62 >> +#define MIPHY_BIAS_BOOST_1 0x63 >> +#define MIPHY_BIAS_BOOST_2 0x64 >> +#define MIPHY_RX_DESBUFF_FDB_2 0x67 >> +#define MIPHY_RX_DESBUFF_FDB_3 0x68 >> +#define MIPHY_SIGDET_COMPENS1 0x69 >> +#define MIPHY_SIGDET_COMPENS2 0x6a >> +#define MIPHY_JITTER_PERIOD 0x6b >> +#define MIPHY_JITTER_AMPLITUDE_1 0x6c >> +#define MIPHY_JITTER_AMPLITUDE_2 0x6d >> +#define MIPHY_JITTER_AMPLITUDE_3 0x6e >> +#define MIPHY_RX_K_GAIN 0x78 >> +#define MIPHY_RX_BUFFER_CTRL 0x7a >> +#define MIPHY_RX_VGA_GAIN 0x7b >> +#define MIPHY_RX_EQU_GAIN_1 0x7f >> +#define MIPHY_RX_EQU_GAIN_2 0x80 >> +#define MIPHY_RX_EQU_GAIN_3 0x81 >> +#define MIPHY_RX_CAL_CTRL_1 0x97 >> +#define MIPHY_RX_CAL_CTRL_2 0x98 >> +#define MIPHY_RX_CAL_OFFSET_CTRL 0x99 >> +#define MIPHY_RX_CAL_VGA_STEP 0x9a >> +#define MIPHY_RX_CAL_EYE_MIN 0x9d >> +#define MIPHY_RX_CAL_OPT_LENGTH 0x9f >> +#define MIPHY_RX_LOCK_CTRL_1 0xc1 >> +#define MIPHY_RX_LOCK_SETTINGS_OPT 0xc2 >> +#define MIPHY_RX_LOCK_STEP 0xc4 >> +#define MIPHY_RX_SIGDET_SLEEP_OA 0xc9 >> +#define MIPHY_RX_SIGDET_SLEEP_SEL 0xca >> +#define MIPHY_RX_SIGDET_WAIT_SEL 0xcb >> +#define MIPHY_RX_SIGDET_DATA_SEL 0xcc >> +#define MIPHY_RX_POWER_CTRL_1 0xcd >> +#define MIPHY_RX_POWER_CTRL_2 0xce >> +#define MIPHY_PLL_CALSET_CTRL 0xd3 >> +#define MIPHY_PLL_CALSET_1 0xd4 >> +#define MIPHY_PLL_CALSET_2 0xd5 >> +#define MIPHY_PLL_CALSET_3 0xd6 >> +#define MIPHY_PLL_CALSET_4 0xd7 >> +#define MIPHY_PLL_SBR_1 0xe3 >> +#define MIPHY_PLL_SBR_2 0xe4 >> +#define MIPHY_PLL_SBR_3 0xe5 >> +#define MIPHY_PLL_SBR_4 0xe6 >> +#define MIPHY_PLL_COMMON_MISC_2 0xe9 >> +#define MIPHY_PLL_SPAREIN 0xeb >> + >> +/* >> + * On STiH407 the glue logic can be different among MiPHY devices; for example: >> + * MiPHY0: OSC_FORCE_EXT means: >> + * 0: 30MHz crystal clk - 1: 100MHz ext clk routed through MiPHY1 >> + * MiPHY1: OSC_FORCE_EXT means: >> + * 1: 30MHz crystal clk - 0: 100MHz ext clk routed through MiPHY1 >> + * Some devices have not the possibility to check if the osc is ready. >> + */ >> +#define MIPHY_OSC_FORCE_EXT BIT(3) >> +#define MIPHY_OSC_RDY BIT(5) >> + >> +#define MIPHY_CTRL_MASK 0x0f >> +#define MIPHY_CTRL_DEFAULT 0 >> +#define MIPHY_CTRL_SYNC_D_EN BIT(2) >> + >> +/* SATA / PCIe defines */ >> +#define SATA_CTRL_MASK 0x07 >> +#define PCIE_CTRL_MASK 0xff >> +#define SATA_CTRL_SELECT_SATA 1 >> +#define SATA_CTRL_SELECT_PCIE 0 >> +#define SYSCFG_PCIE_PCIE_VAL 0x80 >> +#define SATA_SPDMODE 1 >> + >> +struct miphy28lp_phy { >> + struct phy *phy; >> + struct miphy28lp_dev *phydev; >> + void __iomem *base; >> + void __iomem *pipebase; >> + >> + bool osc_force_ext; >> + bool osc_rdy; >> + bool px_rx_pol_inv; >> + >> + struct reset_control *miphy_rst; >> + >> + u32 sata_gen; >> + >> + /* Sysconfig registers offsets needed to configure the device */ >> + u32 syscfg_miphy_ctrl; >> + u32 syscfg_miphy_status; >> + u32 syscfg_pci; >> + u32 syscfg_sata; >> + u8 type; >> +}; >> + >> +struct miphy28lp_dev { >> + struct device *dev; >> + struct regmap *regmap; >> + struct mutex miphy_mutex; >> + struct miphy28lp_phy **phys; >> +}; >> + >> +struct miphy_initval { >> + u16 reg; >> + u16 val; >> +}; >> + >> +enum miphy_sata_gen { SATA_GEN1, SATA_GEN2, SATA_GEN3 }; >> + >> +static char *miphy_type_name[] = { "sata-up", "pcie-up", "usb3-up" }; >> + >> +static inline void miphy28lp_cfg_out_of_reset(struct miphy28lp_phy *miphy_phy) >> +{ >> + unsigned long finish = jiffies + 5 * HZ; >> + u8 mask = MIPHY_PLL_HFC_RDY; >> + u8 val; >> + >> + do { >> + val = readb_relaxed(miphy_phy->base + MIPHY_STATUS_1); >> + if ((val & mask) != mask) >> + cpu_relax(); >> + else >> + break; >> + } while (!time_after_eq(jiffies, finish)); >> +} >> + >> +static inline void miphy28lp_configure_reset(struct miphy28lp_phy *miphy_phy) >> +{ >> + void *base = miphy_phy->base; >> + >> + /* Putting Macro in reset */ >> + writeb_relaxed(0x01, base + MIPHY_CONF_RESET); >> + writeb_relaxed(0x03, base + MIPHY_CONF_RESET); >> + >> + /* Wait for a while */ >> + usleep_range(10, 20); /* extra delay after resetting */ > > How was this delay value derived? If the HW spec says so, it would be better to > document it here. Applicable for all the delays added in this patch. After check with team validation, we remove this delay because it's only for debug. >> +} >> + >> + >> + >> +static inline void miphy28lp_configure_sata(struct miphy28lp_phy *miphy_phy) >> +{ >> + void __iomem *base = miphy_phy->base; >> + >> + /* Putting Macro in reset */ >> + writeb_relaxed(0x01, base + MIPHY_CONF_RESET); >> + writeb_relaxed(0x03, base + MIPHY_CONF_RESET); >> + >> + /* Wait for a while */ >> + usleep_range(10, 20); /* extra delay after resetting */ > > You already have a function miphy28lp_configure_reset doing the same no? yes, will be fix on v3 >> + >> + /* Bringing the MIPHY-CPU registers out of reset */ >> + writeb_relaxed(0x1c, base + MIPHY_CONTROL); >> + >> + /* Applying PLL Settings */ >> + writeb_relaxed(0x1d, base + MIPHY_PLL_SPAREIN); >> + writeb_relaxed(0x1e, base + MIPHY_PLL_CLKREF_FREQ); >> + >> + /* PLL Ratio */ >> + writeb_relaxed(0xc8, base + MIPHY_PLL_CALSET_1); >> + writeb_relaxed(0x00, base + MIPHY_PLL_CALSET_2); >> + writeb_relaxed(0x00, base + MIPHY_PLL_CALSET_3); >> + writeb_relaxed(0x00, base + MIPHY_PLL_CALSET_4); >> + >> + /* Number of PLL Calibrations */ >> + writeb_relaxed(0x00, base + MIPHY_PLL_CALSET_CTRL); >> + >> + /* Unbanked Settings */ >> + writeb_relaxed(0xd1, base + MIPHY_TX_CAL_MAN); >> + writeb_relaxed(0x1f, base + MIPHY_RX_CAL_OFFSET_CTRL); >> + writeb_relaxed(0x40, base + MIPHY_BOUNDARY_SEL); >> + >> + /* Banked settings */ >> + /* Gen 1 */ >> + writeb_relaxed(0x00, base + MIPHY_CONF); >> + writeb_relaxed(0x00, base + MIPHY_SPEED); >> + writeb_relaxed(0x00, base + MIPHY_BIAS_BOOST_1); > > Aren't the 0's default reset values? Can we do only the bare minimal settings > required to get this PHY functions. 0's aren't default reset values, differ on cut version. > >> + writeb_relaxed(0xae, base + MIPHY_BIAS_BOOST_2); >> + >> + /* TX buffer Settings */ >> + writeb_relaxed(0x53, base + MIPHY_TX_CTRL_2); >> + writeb_relaxed(0x00, base + MIPHY_TX_CTRL_3); >> + >> + /* RX Buffer Settings */ >> + writeb_relaxed(0x0d, base + MIPHY_RX_BUFFER_CTRL); >> + writeb_relaxed(0x7d, base + MIPHY_RX_EQU_GAIN_1); >> + writeb_relaxed(0x56, base + MIPHY_RX_EQU_GAIN_2); >> + writeb_relaxed(0x00, base + MIPHY_RX_EQU_GAIN_3); >> + writeb_relaxed(0x00, base + MIPHY_RX_VGA_GAIN); >> + >> + /* Gen 2 */ >> + writeb_relaxed(0x01, base + MIPHY_CONF); >> + writeb_relaxed(0x05, base + MIPHY_SPEED); >> + writeb_relaxed(0x00, base + MIPHY_BIAS_BOOST_1); >> + writeb_relaxed(0xae, base + MIPHY_BIAS_BOOST_2); >> + >> + /* TX buffer Settings */ >> + writeb_relaxed(0x72, base + MIPHY_TX_CTRL_2); >> + writeb_relaxed(0x20, base + MIPHY_TX_CTRL_3); >> + >> + /* RX Buffer Settings */ >> + writeb_relaxed(0x0d, base + MIPHY_RX_BUFFER_CTRL); >> + writeb_relaxed(0x7d, base + MIPHY_RX_EQU_GAIN_1); >> + writeb_relaxed(0x56, base + MIPHY_RX_EQU_GAIN_2); >> + writeb_relaxed(0x00, base + MIPHY_RX_EQU_GAIN_3); >> + writeb_relaxed(0x00, base + MIPHY_RX_VGA_GAIN); >> + >> + /* Gen 3 */ >> + writeb_relaxed(0x02, base + MIPHY_CONF); >> + writeb_relaxed(0x0a, base + MIPHY_SPEED); >> + writeb_relaxed(0x00, base + MIPHY_BIAS_BOOST_1); >> + writeb_relaxed(0xae, base + MIPHY_BIAS_BOOST_2); >> + >> + /* TX buffer Settings */ >> + writeb_relaxed(0xc0, base + MIPHY_TX_CTRL_2); >> + writeb_relaxed(0x20, base + MIPHY_TX_CTRL_3); >> + >> + /* RX Buffer Settings */ >> + writeb_relaxed(0x0d, base + MIPHY_RX_BUFFER_CTRL); >> + writeb_relaxed(0x7d, base + MIPHY_RX_EQU_GAIN_1); >> + writeb_relaxed(0x56, base + MIPHY_RX_EQU_GAIN_2); >> + writeb_relaxed(0x00, base + MIPHY_RX_EQU_GAIN_3); >> + writeb_relaxed(0x00, base + MIPHY_RX_VGA_GAIN); >> + >> + /* Power control */ >> + writeb_relaxed(0x21, base + MIPHY_RX_POWER_CTRL_1); >> + >> + /* Macro out of reset */ >> + writeb_relaxed(0x00, base + MIPHY_CONF_RESET); >> + >> + /* Poll for HFC ready after reset release */ >> + /* Compensation measurement */ >> + writeb_relaxed(0x05, base + MIPHY_RESET); >> + writeb_relaxed(0x00, base + MIPHY_PLL_COMMON_MISC_2); >> + writeb_relaxed(0x40, base + MIPHY_COMP_FSM_1); >> + writeb_relaxed(0x00, base + MIPHY_RESET); >> + writeb_relaxed(0x40, base + MIPHY_PLL_COMMON_MISC_2); > > This function can be split into separate smaller functions and can be resued > for pcie and usb3. ok >> +} >> + >> +static inline void miphy28lp_configure_pcie(struct miphy28lp_phy *miphy_phy) >> +{ >> + void __iomem *base = miphy_phy->base; >> + >> + /* Putting Macro in reset */ >> + writeb_relaxed(0x01, base + MIPHY_CONF_RESET); >> + writeb_relaxed(0x03, base + MIPHY_CONF_RESET); >> + >> + /* Wait for a while */ >> + usleep_range(10, 20); /* extra delay after resetting */ >> + >> + /* Bringing the MIPHY-CPU registers out of reset */ >> + writeb_relaxed(0x01, base + MIPHY_CONF_RESET); >> + writeb_relaxed(0x14, base + MIPHY_CONTROL); >> + writeb_relaxed(0x1d, base + MIPHY_PLL_SPAREIN); >> + >> + /* Applying PLL Settings */ >> + writeb_relaxed(0x1e, base + MIPHY_PLL_CLKREF_FREQ); >> + >> + /* PLL Ratio */ >> + writeb_relaxed(0xa6, base + MIPHY_PLL_CALSET_1); >> + writeb_relaxed(0xaa, base + MIPHY_PLL_CALSET_2); >> + writeb_relaxed(0xaa, base + MIPHY_PLL_CALSET_3); >> + writeb_relaxed(0x00, base + MIPHY_PLL_CALSET_4); >> + writeb_relaxed(0x00, base + MIPHY_PLL_CALSET_CTRL); >> + >> + writeb_relaxed(0xd1, base + MIPHY_TX_CAL_MAN); >> + writeb_relaxed(0x5f, base + MIPHY_RX_CAL_OFFSET_CTRL); >> + writeb_relaxed(0x40, base + MIPHY_BOUNDARY_SEL); >> + >> + /* Banked settings */ >> + /* Gen 1 */ >> + writeb_relaxed(0x00, base + MIPHY_CONF); >> + >> + writeb_relaxed(0x05, base + MIPHY_SPEED); >> + writeb_relaxed(0x00, base + MIPHY_BIAS_BOOST_1); >> + writeb_relaxed(0xa5, base + MIPHY_BIAS_BOOST_2); >> + >> + /* TX buffer Settings */ >> + writeb_relaxed(0x07, base + MIPHY_TX_CTRL_1); >> + writeb_relaxed(0x71, base + MIPHY_TX_CTRL_2); >> + writeb_relaxed(0x60, base + MIPHY_TX_CTRL_3); >> + writeb_relaxed(0x98, base + MIPHY_RX_K_GAIN); >> + >> + /* RX Buffer Settings */ >> + writeb_relaxed(0x0d, base + MIPHY_RX_BUFFER_CTRL); >> + writeb_relaxed(0x00, base + MIPHY_RX_VGA_GAIN); >> + writeb_relaxed(0x79, base + MIPHY_RX_EQU_GAIN_1); >> + writeb_relaxed(0x56, base + MIPHY_RX_EQU_GAIN_2); >> + >> + /* Gen 2 */ >> + writeb_relaxed(0x01, base + MIPHY_CONF); >> + writeb_relaxed(0x0a, base + MIPHY_SPEED); >> + writeb_relaxed(0x00, base + MIPHY_BIAS_BOOST_1); >> + writeb_relaxed(0xa5, base + MIPHY_BIAS_BOOST_2); >> + >> + /* TX buffer Settings */ >> + writeb_relaxed(0x07, base + MIPHY_TX_CTRL_1); >> + writeb_relaxed(0x70, base + MIPHY_TX_CTRL_2); >> + writeb_relaxed(0x60, base + MIPHY_TX_CTRL_3); >> + writeb_relaxed(0xcc, base + MIPHY_RX_K_GAIN); >> + >> + /* RX Buffer Settings */ >> + writeb_relaxed(0x0d, base + MIPHY_RX_BUFFER_CTRL); >> + writeb_relaxed(0x00, base + MIPHY_RX_VGA_GAIN); >> + writeb_relaxed(0x78, base + MIPHY_RX_EQU_GAIN_1); >> + writeb_relaxed(0x07, base + MIPHY_RX_EQU_GAIN_2); >> + >> + writeb_relaxed(0x21, base + MIPHY_RX_POWER_CTRL_1); >> + >> + /* Macro out of reset */ >> + writeb_relaxed(0x00, base + MIPHY_CONF_RESET); >> + >> + /* Poll for HFC ready after reset release */ >> + /* Compensation measurement */ >> + writeb_relaxed(0x05, base + MIPHY_RESET); >> + writeb_relaxed(0x00, base + MIPHY_PLL_COMMON_MISC_2); >> + writeb_relaxed(0x1e, base + MIPHY_PLL_CLKREF_FREQ); >> + writeb_relaxed(0x40, base + MIPHY_COMP_FSM_1); >> + >> + /* extra delay to wait pll lock */ >> + usleep_range(100, 120); >> + >> + writeb_relaxed(0x01, base + MIPHY_RESET); >> + writeb_relaxed(0x00, base + MIPHY_RESET); >> + writeb_relaxed(0x40, base + MIPHY_PLL_COMMON_MISC_2); >> + writeb_relaxed(0x02, base + MIPHY_PLL_SBR_1); > > Are all these settings necessary? Can't we have a bare minimal settings needed > to get the PHY functional. Yes all settings are necessary. > > Thanks > Kishon
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index 0dd7427..2053f72 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -230,4 +230,12 @@ config PHY_XGENE help This option enables support for APM X-Gene SoC multi-purpose PHY. +config PHY_MIPHY28LP + tristate "STMicroelectronics MIPHY28LP PHY driver for STiH407" + depends on ARCH_STI + depends on GENERIC_PHY + help + Enable this to support the miphy transceiver (for SATA/PCIE/USB3) + that is part of STMicroelectronics STiH407 SoC. + endmenu diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index 95c69ed..f7e7c59 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_BCM_KONA_USB2_PHY) += phy-bcm-kona-usb2.o obj-$(CONFIG_PHY_EXYNOS_DP_VIDEO) += phy-exynos-dp-video.o obj-$(CONFIG_PHY_EXYNOS_MIPI_VIDEO) += phy-exynos-mipi-video.o obj-$(CONFIG_PHY_MVEBU_SATA) += phy-mvebu-sata.o +obj-$(CONFIG_PHY_MIPHY28LP) += phy-miphy28lp.o obj-$(CONFIG_PHY_MIPHY365X) += phy-miphy365x.o obj-$(CONFIG_OMAP_CONTROL_PHY) += phy-omap-control.o obj-$(CONFIG_OMAP_USB2) += phy-omap-usb2.o diff --git a/drivers/phy/phy-miphy28lp.c b/drivers/phy/phy-miphy28lp.c new file mode 100644 index 0000000..aa36cea --- /dev/null +++ b/drivers/phy/phy-miphy28lp.c @@ -0,0 +1,985 @@ +/* + * Copyright (C) 2014 STMicroelectronics + * + * STMicroelectronics PHY driver MiPHY28lp (for SoC STiH407). + * + * Author: Alexandre Torgue <alexandre.torgue@st.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2, as + * published by the Free Software Foundation. + * + */ + +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_platform.h> +#include <linux/of_address.h> +#include <linux/clk.h> +#include <linux/phy/phy.h> +#include <linux/delay.h> +#include <linux/mfd/syscon.h> +#include <linux/regmap.h> +#include <linux/reset.h> + +#include <dt-bindings/phy/phy-miphy.h> + +/* MiPHY mask registers */ +#define MIPHY_PHY_RDY 0x01 +#define MIPHY_PLL_HFC_RDY 0x06 +#define MIPHY_COMP_DONE 0x80 + +#define MIPHY_PX_RX_POL BIT(5) + +/* MiPHY registers */ +#define MIPHY_CONF_RESET 0x00 +#define MIPHY_RESET 0x01 +#define MIPHY_STATUS_1 0x02 +#define MIPHY_CONTROL 0x04 +#define MIPHY_BOUNDARY_SEL 0x0a +#define MIPHY_BOUNDARY_1 0x0b +#define MIPHY_BOUNDARY_2 0x0c +#define MIPHY_PLL_CLKREF_FREQ 0x0d +#define MIPHY_SPEED 0x0e +#define MIPHY_CONF 0x0f +#define MIPHY_CTRL_TEST_SEL 0x20 +#define MIPHY_CTRL_TEST_1 0x21 +#define MIPHY_CTRL_TEST_2 0x22 +#define MIPHY_CTRL_TEST_3 0x23 +#define MIPHY_CTRL_TEST_4 0x24 +#define MIPHY_FEEDBACK_TEST 0x25 +#define MIPHY_DEBUG_BUS 0x26 +#define MIPHY_DEBUG_STATUS_MSB 0x27 +#define MIPHY_DEBUG_STATUS_LSB 0x28 +#define MIPHY_PWR_RAIL_1 0x29 +#define MIPHY_PWR_RAIL_2 0x2a +#define MIPHY_SYNCHAR_CONTROL 0x30 +#define MIPHY_COMP_FSM_1 0x3a +#define MIPHY_COMP_FSM_6 0x3f +#define MIPHY_COMP_POSTP 0x42 +#define MIPHY_TX_CTRL_1 0x49 +#define MIPHY_TX_CTRL_2 0x4a +#define MIPHY_TX_CTRL_3 0x4b +#define MIPHY_TX_CAL_MAN 0x4e +#define MIPHY_TST_BIAS_BOOST_2 0x62 +#define MIPHY_BIAS_BOOST_1 0x63 +#define MIPHY_BIAS_BOOST_2 0x64 +#define MIPHY_RX_DESBUFF_FDB_2 0x67 +#define MIPHY_RX_DESBUFF_FDB_3 0x68 +#define MIPHY_SIGDET_COMPENS1 0x69 +#define MIPHY_SIGDET_COMPENS2 0x6a +#define MIPHY_JITTER_PERIOD 0x6b +#define MIPHY_JITTER_AMPLITUDE_1 0x6c +#define MIPHY_JITTER_AMPLITUDE_2 0x6d +#define MIPHY_JITTER_AMPLITUDE_3 0x6e +#define MIPHY_RX_K_GAIN 0x78 +#define MIPHY_RX_BUFFER_CTRL 0x7a +#define MIPHY_RX_VGA_GAIN 0x7b +#define MIPHY_RX_EQU_GAIN_1 0x7f +#define MIPHY_RX_EQU_GAIN_2 0x80 +#define MIPHY_RX_EQU_GAIN_3 0x81 +#define MIPHY_RX_CAL_CTRL_1 0x97 +#define MIPHY_RX_CAL_CTRL_2 0x98 +#define MIPHY_RX_CAL_OFFSET_CTRL 0x99 +#define MIPHY_RX_CAL_VGA_STEP 0x9a +#define MIPHY_RX_CAL_EYE_MIN 0x9d +#define MIPHY_RX_CAL_OPT_LENGTH 0x9f +#define MIPHY_RX_LOCK_CTRL_1 0xc1 +#define MIPHY_RX_LOCK_SETTINGS_OPT 0xc2 +#define MIPHY_RX_LOCK_STEP 0xc4 +#define MIPHY_RX_SIGDET_SLEEP_OA 0xc9 +#define MIPHY_RX_SIGDET_SLEEP_SEL 0xca +#define MIPHY_RX_SIGDET_WAIT_SEL 0xcb +#define MIPHY_RX_SIGDET_DATA_SEL 0xcc +#define MIPHY_RX_POWER_CTRL_1 0xcd +#define MIPHY_RX_POWER_CTRL_2 0xce +#define MIPHY_PLL_CALSET_CTRL 0xd3 +#define MIPHY_PLL_CALSET_1 0xd4 +#define MIPHY_PLL_CALSET_2 0xd5 +#define MIPHY_PLL_CALSET_3 0xd6 +#define MIPHY_PLL_CALSET_4 0xd7 +#define MIPHY_PLL_SBR_1 0xe3 +#define MIPHY_PLL_SBR_2 0xe4 +#define MIPHY_PLL_SBR_3 0xe5 +#define MIPHY_PLL_SBR_4 0xe6 +#define MIPHY_PLL_COMMON_MISC_2 0xe9 +#define MIPHY_PLL_SPAREIN 0xeb + +/* + * On STiH407 the glue logic can be different among MiPHY devices; for example: + * MiPHY0: OSC_FORCE_EXT means: + * 0: 30MHz crystal clk - 1: 100MHz ext clk routed through MiPHY1 + * MiPHY1: OSC_FORCE_EXT means: + * 1: 30MHz crystal clk - 0: 100MHz ext clk routed through MiPHY1 + * Some devices have not the possibility to check if the osc is ready. + */ +#define MIPHY_OSC_FORCE_EXT BIT(3) +#define MIPHY_OSC_RDY BIT(5) + +#define MIPHY_CTRL_MASK 0x0f +#define MIPHY_CTRL_DEFAULT 0 +#define MIPHY_CTRL_SYNC_D_EN BIT(2) + +/* SATA / PCIe defines */ +#define SATA_CTRL_MASK 0x07 +#define PCIE_CTRL_MASK 0xff +#define SATA_CTRL_SELECT_SATA 1 +#define SATA_CTRL_SELECT_PCIE 0 +#define SYSCFG_PCIE_PCIE_VAL 0x80 +#define SATA_SPDMODE 1 + +struct miphy28lp_phy { + struct phy *phy; + struct miphy28lp_dev *phydev; + void __iomem *base; + void __iomem *pipebase; + + bool osc_force_ext; + bool osc_rdy; + bool px_rx_pol_inv; + + struct reset_control *miphy_rst; + + u32 sata_gen; + + /* Sysconfig registers offsets needed to configure the device */ + u32 syscfg_miphy_ctrl; + u32 syscfg_miphy_status; + u32 syscfg_pci; + u32 syscfg_sata; + u8 type; +}; + +struct miphy28lp_dev { + struct device *dev; + struct regmap *regmap; + struct mutex miphy_mutex; + struct miphy28lp_phy **phys; +}; + +struct miphy_initval { + u16 reg; + u16 val; +}; + +enum miphy_sata_gen { SATA_GEN1, SATA_GEN2, SATA_GEN3 }; + +static char *miphy_type_name[] = { "sata-up", "pcie-up", "usb3-up" }; + +static inline void miphy28lp_cfg_out_of_reset(struct miphy28lp_phy *miphy_phy) +{ + unsigned long finish = jiffies + 5 * HZ; + u8 mask = MIPHY_PLL_HFC_RDY; + u8 val; + + do { + val = readb_relaxed(miphy_phy->base + MIPHY_STATUS_1); + if ((val & mask) != mask) + cpu_relax(); + else + break; + } while (!time_after_eq(jiffies, finish)); +} + +static inline void miphy28lp_configure_reset(struct miphy28lp_phy *miphy_phy) +{ + void *base = miphy_phy->base; + + /* Putting Macro in reset */ + writeb_relaxed(0x01, base + MIPHY_CONF_RESET); + writeb_relaxed(0x03, base + MIPHY_CONF_RESET); + + /* Wait for a while */ + usleep_range(10, 20); /* extra delay after resetting */ +} + + + +static inline void miphy28lp_configure_sata(struct miphy28lp_phy *miphy_phy) +{ + void __iomem *base = miphy_phy->base; + + /* Putting Macro in reset */ + writeb_relaxed(0x01, base + MIPHY_CONF_RESET); + writeb_relaxed(0x03, base + MIPHY_CONF_RESET); + + /* Wait for a while */ + usleep_range(10, 20); /* extra delay after resetting */ + + /* Bringing the MIPHY-CPU registers out of reset */ + writeb_relaxed(0x1c, base + MIPHY_CONTROL); + + /* Applying PLL Settings */ + writeb_relaxed(0x1d, base + MIPHY_PLL_SPAREIN); + writeb_relaxed(0x1e, base + MIPHY_PLL_CLKREF_FREQ); + + /* PLL Ratio */ + writeb_relaxed(0xc8, base + MIPHY_PLL_CALSET_1); + writeb_relaxed(0x00, base + MIPHY_PLL_CALSET_2); + writeb_relaxed(0x00, base + MIPHY_PLL_CALSET_3); + writeb_relaxed(0x00, base + MIPHY_PLL_CALSET_4); + + /* Number of PLL Calibrations */ + writeb_relaxed(0x00, base + MIPHY_PLL_CALSET_CTRL); + + /* Unbanked Settings */ + writeb_relaxed(0xd1, base + MIPHY_TX_CAL_MAN); + writeb_relaxed(0x1f, base + MIPHY_RX_CAL_OFFSET_CTRL); + writeb_relaxed(0x40, base + MIPHY_BOUNDARY_SEL); + + /* Banked settings */ + /* Gen 1 */ + writeb_relaxed(0x00, base + MIPHY_CONF); + writeb_relaxed(0x00, base + MIPHY_SPEED); + writeb_relaxed(0x00, base + MIPHY_BIAS_BOOST_1); + writeb_relaxed(0xae, base + MIPHY_BIAS_BOOST_2); + + /* TX buffer Settings */ + writeb_relaxed(0x53, base + MIPHY_TX_CTRL_2); + writeb_relaxed(0x00, base + MIPHY_TX_CTRL_3); + + /* RX Buffer Settings */ + writeb_relaxed(0x0d, base + MIPHY_RX_BUFFER_CTRL); + writeb_relaxed(0x7d, base + MIPHY_RX_EQU_GAIN_1); + writeb_relaxed(0x56, base + MIPHY_RX_EQU_GAIN_2); + writeb_relaxed(0x00, base + MIPHY_RX_EQU_GAIN_3); + writeb_relaxed(0x00, base + MIPHY_RX_VGA_GAIN); + + /* Gen 2 */ + writeb_relaxed(0x01, base + MIPHY_CONF); + writeb_relaxed(0x05, base + MIPHY_SPEED); + writeb_relaxed(0x00, base + MIPHY_BIAS_BOOST_1); + writeb_relaxed(0xae, base + MIPHY_BIAS_BOOST_2); + + /* TX buffer Settings */ + writeb_relaxed(0x72, base + MIPHY_TX_CTRL_2); + writeb_relaxed(0x20, base + MIPHY_TX_CTRL_3); + + /* RX Buffer Settings */ + writeb_relaxed(0x0d, base + MIPHY_RX_BUFFER_CTRL); + writeb_relaxed(0x7d, base + MIPHY_RX_EQU_GAIN_1); + writeb_relaxed(0x56, base + MIPHY_RX_EQU_GAIN_2); + writeb_relaxed(0x00, base + MIPHY_RX_EQU_GAIN_3); + writeb_relaxed(0x00, base + MIPHY_RX_VGA_GAIN); + + /* Gen 3 */ + writeb_relaxed(0x02, base + MIPHY_CONF); + writeb_relaxed(0x0a, base + MIPHY_SPEED); + writeb_relaxed(0x00, base + MIPHY_BIAS_BOOST_1); + writeb_relaxed(0xae, base + MIPHY_BIAS_BOOST_2); + + /* TX buffer Settings */ + writeb_relaxed(0xc0, base + MIPHY_TX_CTRL_2); + writeb_relaxed(0x20, base + MIPHY_TX_CTRL_3); + + /* RX Buffer Settings */ + writeb_relaxed(0x0d, base + MIPHY_RX_BUFFER_CTRL); + writeb_relaxed(0x7d, base + MIPHY_RX_EQU_GAIN_1); + writeb_relaxed(0x56, base + MIPHY_RX_EQU_GAIN_2); + writeb_relaxed(0x00, base + MIPHY_RX_EQU_GAIN_3); + writeb_relaxed(0x00, base + MIPHY_RX_VGA_GAIN); + + /* Power control */ + writeb_relaxed(0x21, base + MIPHY_RX_POWER_CTRL_1); + + /* Macro out of reset */ + writeb_relaxed(0x00, base + MIPHY_CONF_RESET); + + /* Poll for HFC ready after reset release */ + /* Compensation measurement */ + writeb_relaxed(0x05, base + MIPHY_RESET); + writeb_relaxed(0x00, base + MIPHY_PLL_COMMON_MISC_2); + writeb_relaxed(0x40, base + MIPHY_COMP_FSM_1); + writeb_relaxed(0x00, base + MIPHY_RESET); + writeb_relaxed(0x40, base + MIPHY_PLL_COMMON_MISC_2); +} + +static inline void miphy28lp_configure_pcie(struct miphy28lp_phy *miphy_phy) +{ + void __iomem *base = miphy_phy->base; + + /* Putting Macro in reset */ + writeb_relaxed(0x01, base + MIPHY_CONF_RESET); + writeb_relaxed(0x03, base + MIPHY_CONF_RESET); + + /* Wait for a while */ + usleep_range(10, 20); /* extra delay after resetting */ + + /* Bringing the MIPHY-CPU registers out of reset */ + writeb_relaxed(0x01, base + MIPHY_CONF_RESET); + writeb_relaxed(0x14, base + MIPHY_CONTROL); + writeb_relaxed(0x1d, base + MIPHY_PLL_SPAREIN); + + /* Applying PLL Settings */ + writeb_relaxed(0x1e, base + MIPHY_PLL_CLKREF_FREQ); + + /* PLL Ratio */ + writeb_relaxed(0xa6, base + MIPHY_PLL_CALSET_1); + writeb_relaxed(0xaa, base + MIPHY_PLL_CALSET_2); + writeb_relaxed(0xaa, base + MIPHY_PLL_CALSET_3); + writeb_relaxed(0x00, base + MIPHY_PLL_CALSET_4); + writeb_relaxed(0x00, base + MIPHY_PLL_CALSET_CTRL); + + writeb_relaxed(0xd1, base + MIPHY_TX_CAL_MAN); + writeb_relaxed(0x5f, base + MIPHY_RX_CAL_OFFSET_CTRL); + writeb_relaxed(0x40, base + MIPHY_BOUNDARY_SEL); + + /* Banked settings */ + /* Gen 1 */ + writeb_relaxed(0x00, base + MIPHY_CONF); + + writeb_relaxed(0x05, base + MIPHY_SPEED); + writeb_relaxed(0x00, base + MIPHY_BIAS_BOOST_1); + writeb_relaxed(0xa5, base + MIPHY_BIAS_BOOST_2); + + /* TX buffer Settings */ + writeb_relaxed(0x07, base + MIPHY_TX_CTRL_1); + writeb_relaxed(0x71, base + MIPHY_TX_CTRL_2); + writeb_relaxed(0x60, base + MIPHY_TX_CTRL_3); + writeb_relaxed(0x98, base + MIPHY_RX_K_GAIN); + + /* RX Buffer Settings */ + writeb_relaxed(0x0d, base + MIPHY_RX_BUFFER_CTRL); + writeb_relaxed(0x00, base + MIPHY_RX_VGA_GAIN); + writeb_relaxed(0x79, base + MIPHY_RX_EQU_GAIN_1); + writeb_relaxed(0x56, base + MIPHY_RX_EQU_GAIN_2); + + /* Gen 2 */ + writeb_relaxed(0x01, base + MIPHY_CONF); + writeb_relaxed(0x0a, base + MIPHY_SPEED); + writeb_relaxed(0x00, base + MIPHY_BIAS_BOOST_1); + writeb_relaxed(0xa5, base + MIPHY_BIAS_BOOST_2); + + /* TX buffer Settings */ + writeb_relaxed(0x07, base + MIPHY_TX_CTRL_1); + writeb_relaxed(0x70, base + MIPHY_TX_CTRL_2); + writeb_relaxed(0x60, base + MIPHY_TX_CTRL_3); + writeb_relaxed(0xcc, base + MIPHY_RX_K_GAIN); + + /* RX Buffer Settings */ + writeb_relaxed(0x0d, base + MIPHY_RX_BUFFER_CTRL); + writeb_relaxed(0x00, base + MIPHY_RX_VGA_GAIN); + writeb_relaxed(0x78, base + MIPHY_RX_EQU_GAIN_1); + writeb_relaxed(0x07, base + MIPHY_RX_EQU_GAIN_2); + + writeb_relaxed(0x21, base + MIPHY_RX_POWER_CTRL_1); + + /* Macro out of reset */ + writeb_relaxed(0x00, base + MIPHY_CONF_RESET); + + /* Poll for HFC ready after reset release */ + /* Compensation measurement */ + writeb_relaxed(0x05, base + MIPHY_RESET); + writeb_relaxed(0x00, base + MIPHY_PLL_COMMON_MISC_2); + writeb_relaxed(0x1e, base + MIPHY_PLL_CLKREF_FREQ); + writeb_relaxed(0x40, base + MIPHY_COMP_FSM_1); + + /* extra delay to wait pll lock */ + usleep_range(100, 120); + + writeb_relaxed(0x01, base + MIPHY_RESET); + writeb_relaxed(0x00, base + MIPHY_RESET); + writeb_relaxed(0x40, base + MIPHY_PLL_COMMON_MISC_2); + writeb_relaxed(0x02, base + MIPHY_PLL_SBR_1); +} + +static inline void miphy28lp_configure_usb3(struct miphy28lp_phy *miphy_phy) +{ + void __iomem *base = miphy_phy->base; + + /* Putting Macro in reset */ + writeb_relaxed(0x01, base + MIPHY_CONF_RESET); + writeb_relaxed(0x03, base + MIPHY_CONF_RESET); + + /* Wait for a while */ + usleep_range(10, 20); /* extra delay after resetting */ + + /* Bringing the MIPHY-CPU registers out of reset */ + writeb_relaxed(0x01, base + MIPHY_CONF_RESET); + writeb_relaxed(0x1c, base + MIPHY_CONTROL); + + /* PLL calibration */ + writeb_relaxed(0x1d, base + MIPHY_PLL_SPAREIN); + writeb_relaxed(0x1e, base + MIPHY_PLL_CLKREF_FREQ); + writeb_relaxed(0x00, base + MIPHY_CONF); + writeb_relaxed(0x70, base + MIPHY_RX_LOCK_STEP); + + writeb_relaxed(0x02, base + MIPHY_RX_SIGDET_SLEEP_OA); + writeb_relaxed(0x02, base + MIPHY_RX_SIGDET_SLEEP_SEL); + writeb_relaxed(0x02, base + MIPHY_RX_SIGDET_WAIT_SEL); + writeb_relaxed(0x0a, base + MIPHY_RX_SIGDET_DATA_SEL); + + /* Writing The PLL Ratio */ + writeb_relaxed(0xa6, base + MIPHY_PLL_CALSET_1); + writeb_relaxed(0xaa, base + MIPHY_PLL_CALSET_2); + writeb_relaxed(0xaa, base + MIPHY_PLL_CALSET_3); + writeb_relaxed(0x04, base + MIPHY_PLL_CALSET_4); + writeb_relaxed(0x00, base + MIPHY_PLL_CALSET_CTRL); + + /* Writing The Speed Rate */ + writeb_relaxed(0x00, base + MIPHY_CONF); + writeb_relaxed(0x0a, base + MIPHY_SPEED); + + /* RX Channel compensation and calibration */ + writeb_relaxed(0x1c, base + MIPHY_RX_LOCK_SETTINGS_OPT); + writeb_relaxed(0x51, base + MIPHY_RX_CAL_CTRL_1); + writeb_relaxed(0x70, base + MIPHY_RX_CAL_CTRL_2); + writeb_relaxed(0x5f, base + MIPHY_RX_CAL_OFFSET_CTRL); + + /* Channel compensation and calibration */ + writeb_relaxed(0x22, base + MIPHY_RX_CAL_VGA_STEP); + writeb_relaxed(0x0e, base + MIPHY_RX_CAL_OPT_LENGTH); + + writeb_relaxed(0x05, base + MIPHY_RX_BUFFER_CTRL); + writeb_relaxed(0x78, base + MIPHY_RX_EQU_GAIN_1); + writeb_relaxed(0x1b, base + MIPHY_SYNCHAR_CONTROL); + + /* Enable GENSEL_SEL and SSC */ + /* TX_SEL=0 swing preemp forced by pipe registres */ + writeb_relaxed(0x11, base + MIPHY_BOUNDARY_SEL); + + /* MIPHY Bias boost */ + writeb_relaxed(0x00, base + MIPHY_BIAS_BOOST_1); + writeb_relaxed(0xa7, base + MIPHY_BIAS_BOOST_2); + + /* TX compensation offset to re-center TX impedance */ + writeb_relaxed(0x02, base + MIPHY_COMP_POSTP); + + /* SSC modulation */ + writeb_relaxed(0x04, base + MIPHY_BOUNDARY_2); + + /* MIPHY TX control */ + writeb_relaxed(0x00, base + MIPHY_CONF); + writeb_relaxed(0x5a, base + MIPHY_PLL_SBR_3); + writeb_relaxed(0xa0, base + MIPHY_PLL_SBR_4); + writeb_relaxed(0x3c, base + MIPHY_PLL_SBR_2); + writeb_relaxed(0x00, base + MIPHY_PLL_SBR_1); + writeb_relaxed(0x02, base + MIPHY_PLL_SBR_1); + writeb_relaxed(0x00, base + MIPHY_PLL_SBR_1); + + /* Rx PI controller settings */ + writeb_relaxed(0xca, base + MIPHY_RX_K_GAIN); + + /* MIPHY RX input bridge control */ + /* INPUT_BRIDGE_EN_SW=1, manual input bridge control[0]=1 */ + writeb_relaxed(0x21, base + MIPHY_RX_POWER_CTRL_1); + writeb_relaxed(0x29, base + MIPHY_RX_POWER_CTRL_1); + writeb_relaxed(0x1a, base + MIPHY_RX_POWER_CTRL_2); + + /* MIPHY Reset */ + writeb_relaxed(0x01, base + MIPHY_CONF_RESET); + writeb_relaxed(0x00, base + MIPHY_CONF_RESET); + writeb_relaxed(0x04, base + MIPHY_RESET); + writeb_relaxed(0x05, base + MIPHY_RESET); + + writeb_relaxed(0x00, base + MIPHY_PLL_COMMON_MISC_2); + writeb_relaxed(0x1e, base + MIPHY_PLL_CLKREF_FREQ); + writeb_relaxed(0x40, base + MIPHY_COMP_FSM_1); + writeb_relaxed(0x01, base + MIPHY_RESET); + + writeb_relaxed(0x00, base + MIPHY_RESET); + writeb_relaxed(0x40, base + MIPHY_PLL_COMMON_MISC_2); + writeb_relaxed(0x00, base + MIPHY_CONF); + writeb_relaxed(0x00, base + MIPHY_BOUNDARY_1); + + writeb_relaxed(0x00, base + MIPHY_TST_BIAS_BOOST_2); + writeb_relaxed(0x00, base + MIPHY_CONF); + writeb_relaxed(0x02, base + MIPHY_PLL_SBR_1); + writeb_relaxed(0xa5, base + MIPHY_DEBUG_BUS); + + writeb_relaxed(0x00, base + MIPHY_CONF); +} + +static inline int miphy_is_ready(struct miphy28lp_phy *miphy_phy) +{ + unsigned long finish = jiffies + 5 * HZ; + u8 mask = MIPHY_PLL_HFC_RDY; + u8 val; + + /* + * For PCIe and USB3 check only that PLL and HFC are ready + * For SATA check also that phy is ready! + */ + if (miphy_phy->type == MIPHY_TYPE_SATA) + mask |= MIPHY_PHY_RDY; + + do { + val = readb_relaxed(miphy_phy->base + MIPHY_STATUS_1); + if ((val & mask) != mask) + cpu_relax(); + else + return 0; + } while (!time_after_eq(jiffies, finish)); + + return -EBUSY; +} + +static int miphy_osc_is_ready(struct miphy28lp_phy *miphy_phy) +{ + struct miphy28lp_dev *miphy_dev = miphy_phy->phydev; + unsigned long finish = jiffies + 5 * HZ; + u32 val; + + if (!miphy_phy->osc_rdy) + return 0; + + if (!miphy_phy->syscfg_miphy_status) + return -EINVAL; + + do { + regmap_read(miphy_dev->regmap, miphy_phy->syscfg_miphy_status, + &val); + + if ((val & MIPHY_OSC_RDY) != MIPHY_OSC_RDY) + cpu_relax(); + else + return 0; + } while (!time_after_eq(jiffies, finish)); + + return -EBUSY; +} + +static int miphy28lp_get_resource_byname(struct device_node *child, + char *rname, struct resource *res) +{ + int index; + + index = of_property_match_string(child, "reg-names", rname); + if (index < 0) + return -ENODEV; + + return of_address_to_resource(child, index, res); +} + +static int miphy28lp_get_one_addr(struct device *dev, + struct device_node *child, char *rname, + void __iomem **base) +{ + struct resource res; + int ret; + + ret = miphy28lp_get_resource_byname(child, rname, &res); + if (!ret) { + *base = devm_ioremap(dev, res.start, resource_size(&res)); + if (!*base) { + dev_err(dev, "failed to ioremap %s address region\n" + , rname); + return -ENOENT; + } + } + + return 0; +} + +/* MiPHY reset and sysconf setup */ +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) + return -EINVAL; + + err = reset_control_assert(miphy_phy->miphy_rst); + if (err) { + dev_err(miphy_dev->dev, "unable to bring out of miphy reset\n"); + return err; + } + + if (miphy_phy->osc_force_ext) + miphy_val |= MIPHY_OSC_FORCE_EXT; + + regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_miphy_ctrl, + MIPHY_CTRL_MASK, miphy_val); + + err = reset_control_deassert(miphy_phy->miphy_rst); + if (err) { + dev_err(miphy_dev->dev, "unable to bring out of miphy reset\n"); + return err; + } + + return miphy_osc_is_ready(miphy_phy); +} + +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; + u8 val; + + if ((!miphy_phy->syscfg_sata) || (!miphy_phy->syscfg_pci) + || (!miphy_phy->base)) + return -EINVAL; + + dev_info(miphy_dev->dev, "sata-up mode, addr 0x%p\n", miphy_phy->base); + + /* Configure the glue-logic */ + sata_conf |= ((miphy_phy->sata_gen - SATA_GEN1) << SATA_SPDMODE); + + regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_sata, + SATA_CTRL_MASK, sata_conf); + + regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_pci, + PCIE_CTRL_MASK, SATA_CTRL_SELECT_PCIE); + + /* MiPHY path and clocking init */ + err = miphy28lp_setup(miphy_phy, MIPHY_CTRL_DEFAULT); + + if (err) { + dev_err(miphy_dev->dev, "SATA phy setup failed\n"); + return err; + } + + /* initialize miphy */ + miphy28lp_configure_sata(miphy_phy); + + if (miphy_phy->px_rx_pol_inv) { + /* Invert Rx polarity */ + val = readb_relaxed(miphy_phy->base + MIPHY_CONTROL); + val |= MIPHY_PX_RX_POL; + writeb_relaxed(val, miphy_phy->base + MIPHY_CONTROL); + } + + return miphy_is_ready(miphy_phy); +} + +static int miphy28lp_init_pcie(struct miphy28lp_phy *miphy_phy) +{ + struct miphy28lp_dev *miphy_dev = miphy_phy->phydev; + unsigned long finish = jiffies + 5 * HZ; + int err; + u8 val; + + if ((!miphy_phy->syscfg_sata) || (!miphy_phy->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, + SATA_CTRL_MASK, SATA_CTRL_SELECT_PCIE); + + regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_pci, + PCIE_CTRL_MASK, SYSCFG_PCIE_PCIE_VAL); + + /* MiPHY path and clocking init */ + err = miphy28lp_setup(miphy_phy, MIPHY_CTRL_DEFAULT); + + if (err) { + dev_err(miphy_dev->dev, "PCIe phy setup failed\n"); + return err; + } + + /* initialize miphy */ + miphy28lp_configure_pcie(miphy_phy); + + /* Waiting for Compensation to complete */ + do { + val = readb_relaxed(miphy_phy->base + MIPHY_COMP_FSM_6); + if (time_after_eq(jiffies, finish)) + return -EBUSY; + cpu_relax(); + } while (!(val & MIPHY_COMP_DONE)); + + /* PIPE Wrapper Configuration */ + writeb_relaxed(0x68, miphy_phy->pipebase + 0x104); /* Rise_0 */ + writeb_relaxed(0x61, miphy_phy->pipebase + 0x105); /* Rise_1 */ + writeb_relaxed(0x68, miphy_phy->pipebase + 0x108); /* Fall_0 */ + writeb_relaxed(0x61, miphy_phy->pipebase + 0x109); /* Fall-1 */ + writeb_relaxed(0x68, miphy_phy->pipebase + 0x10c); /* Threshhold_0 */ + writeb_relaxed(0x60, miphy_phy->pipebase + 0x10d); /* Threshold_1 */ + + /* Wait for phy_ready */ + return miphy_is_ready(miphy_phy); +} + +static int miphy28lp_init_usb3(struct miphy28lp_phy *miphy_phy) +{ + struct miphy28lp_dev *miphy_dev = miphy_phy->phydev; + int err; + + if ((!miphy_phy->base) || (!miphy_phy->pipebase)) + return -EINVAL; + + dev_info(miphy_dev->dev, "usb3-up mode, addr 0x%p\n", miphy_phy->base); + + /* MiPHY path and clocking init */ + err = miphy28lp_setup(miphy_phy, MIPHY_CTRL_SYNC_D_EN); + + if (err) { + dev_err(miphy_dev->dev, "USB3 phy setup failed\n"); + return err; + } + + /* initialize miphy */ + miphy28lp_configure_usb3(miphy_phy); + + /* PIPE Wrapper Configuration */ + writeb_relaxed(0x68, miphy_phy->pipebase + 0x23); + writeb_relaxed(0x61, miphy_phy->pipebase + 0x24); + writeb_relaxed(0x68, miphy_phy->pipebase + 0x26); + writeb_relaxed(0x61, miphy_phy->pipebase + 0x27); + writeb_relaxed(0x18, miphy_phy->pipebase + 0x29); + writeb_relaxed(0x60, miphy_phy->pipebase + 0x2a); + + /* pipe Wrapper usb3 TX swing de-emph margin PREEMPH[7:4], SWING[3:0] */ + writeb_relaxed(0X67, miphy_phy->pipebase + 0x68); + writeb_relaxed(0x0d, miphy_phy->pipebase + 0x69); + writeb_relaxed(0X67, miphy_phy->pipebase + 0x6a); + writeb_relaxed(0X0d, miphy_phy->pipebase + 0x6b); + writeb_relaxed(0X67, miphy_phy->pipebase + 0x6c); + writeb_relaxed(0X0d, miphy_phy->pipebase + 0x6d); + writeb_relaxed(0X67, miphy_phy->pipebase + 0x6e); + writeb_relaxed(0X0d, miphy_phy->pipebase + 0x6f); + + return miphy_is_ready(miphy_phy); +} + +static int miphy28lp_init(struct phy *phy) +{ + struct miphy28lp_phy *miphy_phy = phy_get_drvdata(phy); + struct miphy28lp_dev *miphy_dev = miphy_phy->phydev; + int ret; + + mutex_lock(&miphy_dev->miphy_mutex); + + switch (miphy_phy->type) { + + case MIPHY_TYPE_SATA: + ret = miphy28lp_init_sata(miphy_phy); + break; + case MIPHY_TYPE_PCIE: + ret = miphy28lp_init_pcie(miphy_phy); + break; + case MIPHY_TYPE_USB: + ret = miphy28lp_init_usb3(miphy_phy); + break; + default: + return -EINVAL; + } + + mutex_unlock(&miphy_dev->miphy_mutex); + + return ret; +} + +static int miphy28lp_get_addr(struct miphy28lp_phy *miphy_phy) +{ + struct miphy28lp_dev *miphy_dev = miphy_phy->phydev; + struct device_node *phynode = miphy_phy->phy->dev.of_node; + int err; + + if (!miphy_phy->type || (miphy_phy->type > MIPHY_TYPE_USB)) + return -EINVAL; + + err = miphy28lp_get_one_addr(miphy_dev->dev, phynode, + miphy_type_name[miphy_phy->type - MIPHY_TYPE_SATA], + &miphy_phy->base); + if (err) + return err; + + if ((miphy_phy->type == MIPHY_TYPE_PCIE) || + (miphy_phy->type == MIPHY_TYPE_USB)) { + err = miphy28lp_get_one_addr(miphy_dev->dev, phynode, "pipew", + &miphy_phy->pipebase); + if (err) + return err; + } + + return 0; +} + +static struct phy *miphy28lp_xlate(struct device *dev, + struct of_phandle_args *args) +{ + struct miphy28lp_dev *miphy_dev = dev_get_drvdata(dev); + struct miphy28lp_phy *miphy_phy = NULL; + struct device_node *phynode = args->np; + int ret, index = 0; + + if (!of_device_is_available(phynode)) { + dev_warn(dev, "Requested PHY is disabled\n"); + return ERR_PTR(-ENODEV); + } + + if (args->args_count != 1) { + dev_err(dev, "Invalid number of cells in 'phy' property\n"); + return ERR_PTR(-EINVAL); + } + + for (index = 0; index < of_get_child_count(dev->of_node); index++) + if (phynode == miphy_dev->phys[index]->phy->dev.of_node) { + miphy_phy = miphy_dev->phys[index]; + break; + } + + if (!miphy_phy) { + dev_err(dev, "Failed to find appropriate phy\n"); + return ERR_PTR(-EINVAL); + } + + miphy_phy->type = args->args[0]; + + ret = miphy28lp_get_addr(miphy_phy); + if (ret < 0) + return ERR_PTR(ret); + + return miphy_phy->phy; +} + +static struct phy_ops miphy28lp_ops = { + .init = miphy28lp_init, + .owner = THIS_MODULE, +}; + +static int miphy28lp_probe_resets(struct device_node *node, + struct miphy28lp_phy *miphy_phy) +{ + struct miphy28lp_dev *miphy_dev = miphy_phy->phydev; + int err; + + miphy_phy->miphy_rst = of_reset_control_get(node, "miphy-sw-rst"); + + if (IS_ERR(miphy_phy->miphy_rst)) { + dev_err(miphy_dev->dev, + "miphy soft reset control not defined\n"); + return PTR_ERR(miphy_phy->miphy_rst); + } + + err = reset_control_deassert(miphy_phy->miphy_rst); + if (err) { + dev_err(miphy_dev->dev, "unable to bring out of miphy reset\n"); + return err; + } + + return 0; +} + +static int miphy28lp_of_probe(struct device_node *np, + struct miphy28lp_phy *miphy_phy) +{ + struct resource res; + + miphy_phy->osc_force_ext = + of_property_read_bool(np, "st,osc-force-ext"); + + miphy_phy->osc_rdy = of_property_read_bool(np, "st,osc-rdy"); + + miphy_phy->px_rx_pol_inv = + of_property_read_bool(np, "st,px_rx_pol_inv"); + + of_property_read_u32(np, "st,sata-gen", &miphy_phy->sata_gen); + 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; + + + return 0; +} + +static int miphy28lp_probe(struct platform_device *pdev) +{ + struct device_node *child, *np = pdev->dev.of_node; + struct miphy28lp_dev *miphy_dev; + struct phy_provider *provider; + struct phy *phy; + int chancount, port = 0; + int ret; + + miphy_dev = devm_kzalloc(&pdev->dev, sizeof(*miphy_dev), GFP_KERNEL); + if (!miphy_dev) + return -ENOMEM; + + chancount = of_get_child_count(np); + miphy_dev->phys = devm_kzalloc(&pdev->dev, sizeof(phy) * chancount, + GFP_KERNEL); + if (!miphy_dev->phys) + return -ENOMEM; + + miphy_dev->regmap = syscon_regmap_lookup_by_phandle(np, "st,syscfg"); + if (IS_ERR(miphy_dev->regmap)) { + dev_err(miphy_dev->dev, "No syscfg phandle specified\n"); + return PTR_ERR(miphy_dev->regmap); + } + + miphy_dev->dev = &pdev->dev; + + dev_set_drvdata(&pdev->dev, miphy_dev); + + mutex_init(&miphy_dev->miphy_mutex); + + for_each_child_of_node(np, child) { + struct miphy28lp_phy *miphy_phy; + + miphy_phy = devm_kzalloc(&pdev->dev, sizeof(*miphy_phy), + GFP_KERNEL); + if (!miphy_phy) + return -ENOMEM; + + miphy_dev->phys[port] = miphy_phy; + + phy = devm_phy_create(&pdev->dev, child, &miphy28lp_ops, NULL); + if (IS_ERR(phy)) { + dev_err(&pdev->dev, "failed to create PHY\n"); + return PTR_ERR(phy); + } + + miphy_dev->phys[port]->phy = phy; + miphy_dev->phys[port]->phydev = miphy_dev; + + ret = miphy28lp_of_probe(child, miphy_phy); + if (ret) + return ret; + + ret = miphy28lp_probe_resets(child, miphy_dev->phys[port]); + if (ret) + return ret; + + phy_set_drvdata(phy, miphy_dev->phys[port]); + port++; + + } + + provider = devm_of_phy_provider_register(&pdev->dev, miphy28lp_xlate); + if (IS_ERR(provider)) + return PTR_ERR(provider); + + return 0; +} + +static const struct of_device_id miphy28lp_of_match[] = { + {.compatible = "st,miphy28lp-phy", }, + {}, +}; + +MODULE_DEVICE_TABLE(of, miphy28lp_of_match); + +static struct platform_driver miphy28lp_driver = { + .probe = miphy28lp_probe, + .driver = { + .name = "miphy28lp-phy", + .owner = THIS_MODULE, + .of_match_table = miphy28lp_of_match, + } +}; + +module_platform_driver(miphy28lp_driver); + +MODULE_AUTHOR("Alexandre Torgue <alexandre.torgue@st.com>"); +MODULE_DESCRIPTION("STMicroelectronics miphy28lp driver"); +MODULE_LICENSE("GPL v2");