misc: Add MPC83xx serdes driver

Add a driver to configure the SerDes (Serializer/Deserializer) lanes on
the MPC83xx architecture.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Mario Six <mario.six@gdsys.cc>

1 files changed, 232 insertions, 0 deletions

diff --git a/drivers/misc/mpc83xx_serdes.h b/drivers/misc/mpc83xx_serdes.h
new file mode 100644
index 0000000000..89ea1dbab7
--- /dev/null
+++ b/drivers/misc/mpc83xx_serdes.h
@@ -0,0 +1,232 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Copyright 2018
+ * Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc
+ */
+
+/**
+ * enum srdscr0_mask - Bit masks for SRDSCR0 (SerDes Control Register 0)
+ * @SRDSCR0_DPPA:       Bitmask for the DPPA (diff pk-pk swing for lane A)
+ *			field of the SRCSCR0
+ * @SRDSCR0_DPPE:       Bitmask for the DPPE (diff pk-pk swing for lane E)
+ *			field of the SRCSCR0
+ * @SRDSCR0_DPP_1V2:    Combined bitmask to set diff pk-pk swing for both lanes
+ * @SRDSCR0_TXEQA_MASK: Bitmask for the TXEQA (transmit equalization for
+ *			lane A) field of the SRCSCR0
+ * @SRDSCR0_TXEQA_SATA: Bitmask to set the TXEQA to the value used for SATA
+ * @SRDSCR0_TXEQE_MASK: Bitmask for the TXEQE (transmit equalization for
+ *			lane E) field of the SRCSCR0
+ * @SRDSCR0_TXEQE_SATA: Bitmask to set the TXEQE to the value used for SATA
+ */
+enum srdscr0_mask {
+	SRDSCR0_DPPA        = BIT(31 - 16),
+	SRDSCR0_DPPE        = BIT(31 - 20),
+	SRDSCR0_DPP_1V2    = SRDSCR0_DPPE | SRDSCR0_DPPA,
+
+	SRDSCR0_TXEQA_MASK = 0x00007000,
+	SRDSCR0_TXEQA_SATA = 0x00001000,
+	SRDSCR0_TXEQE_MASK = 0x00000700,
+	SRDSCR0_TXEQE_SATA = 0x00000100,
+};
+
+/**
+ * enum srdscr1_mask - Bit masks for SRDSCR1 (SerDes Control Register 1)
+ * @SRDSCR1_PLLBW: Bitmask for the PLLBW (PLL bandwidth) field of SRDSCR1
+ */
+enum srdscr1_mask {
+	SRDSCR1_PLLBW = BIT(31 - 25),
+};
+
+/**
+ * enum srdscr2_mask - Bit masks for SRDSCR2 (SerDes Control Register 2)
+ * @SRDSCR2_VDD_1V2:     Bit mask to to set the VDD field of the SCRSCR2
+ * @SRDSCR2_SEICA_MASK:  Bitmask for the SEICA (Receiver electrical idle
+ *			 detection control for lane A) field of the SRCSCR2
+ * @SRDSCR2_SEICE_MASK:  Bitmask for the SEICE (Receiver electrical idle
+ *			 detection control for lane E) field of the SRCSCR2
+ * @SRDSCR2_SEIC_MASK:   Combined bitmask to set the receiver electrical idle
+ *			 detection control for both lanes
+ * @SRDSCR2_SEICA_SATA:  Bitmask to set the SEICA field to the value used for
+ *			 SATA
+ * @SRDSCR2_SEICE_SATA:  Bitmask to set the SEICE field to the value used for
+ *			 SATA
+ * @SRDSCR2_SEIC_SATA:   Combined bitmask to set the value of both SEIC fields
+ *			 to the value used for SATA
+ * @SRDSCR2_SEICA_PEX:   Bitmask to set the SEICA field to the value used for
+ *			 PCI Express
+ * @SRDSCR2_SEICE_PEX:   Bitmask to set the SEICE field to the value used for
+ *			 PCI Express
+ * @SRDSCR2_SEIC_PEX:    Combined bitmask to set the value of both SEIC fields
+ *			 to the value used for PCI Express
+ * @SRDSCR2_SEICA_SGMII: Bitmask to set the SEICA field to the value used for
+ *			 SGMII
+ * @SRDSCR2_SEICE_SGMII: Bitmask to set the SEICE field to the value used for
+ *			 SGMII
+ * @SRDSCR2_SEIC_SGMII:  Combined bitmask to set the value of both SEIC fields
+ *			 to the value used for SGMII
+ */
+enum srdscr2_mask {
+	SRDSCR2_VDD_1V2     = 0x00800000,
+
+	SRDSCR2_SEICA_MASK  = 0x00001c00,
+	SRDSCR2_SEICE_MASK  = 0x0000001c,
+	SRDSCR2_SEIC_MASK   = SRDSCR2_SEICA_MASK | SRDSCR2_SEICE_MASK,
+
+	SRDSCR2_SEICA_SATA  = 0x00001400,
+	SRDSCR2_SEICE_SATA  = 0x00000014,
+	SRDSCR2_SEIC_SATA   = SRDSCR2_SEICA_SATA | SRDSCR2_SEICE_SATA,
+
+	SRDSCR2_SEICA_PEX   = 0x00001000,
+	SRDSCR2_SEICE_PEX   = 0x00000010,
+	SRDSCR2_SEIC_PEX    = SRDSCR2_SEICA_PEX | SRDSCR2_SEICE_PEX,
+
+	SRDSCR2_SEICA_SGMII = 0x00000100,
+	SRDSCR2_SEICE_SGMII = 0x00000001,
+	SRDSCR2_SEIC_SGMII  = SRDSCR2_SEICA_SGMII | SRDSCR2_SEICE_SGMII,
+};
+
+/**
+ * enum srdscr3_mask - Bit masks for SRDSCR3 (SerDes Control Register 3)
+ * @SRDSCR3_KFRA_SATA:      Bitmask to set the KFRA field of SRDSCR3 to the
+ *			    value used by SATA
+ * @SRDSCR3_KFRE_SATA:      Bitmask to set the KFRE field of SRDSCR3 to the
+ *			    value used by SATA
+ * @SRDSCR3_KFR_SATA:       Combined bitmask to set both KFR fields to the
+ *			    value used by SATA
+ * @SRDSCR3_KPHA_SATA:      Bitmask to set the KPHA field of SRDSCR3 to the
+ *			    value used by SATA
+ * @SRDSCR3_KPHE_SATA:      Bitmask to set the KPHE field of SRDSCR3 to the
+ *			    value used by SATA
+ * @SRDSCR3_KPH_SATA:       Combined bitmask to set both KPH fields to the
+ *			    value used by SATA
+ * @SRDSCR3_SDFMA_SATA_PEX: Bitmask to set the SDFMA field of SRDSCR3 to the
+ *			    value used by SATA and PCI Express
+ * @SRDSCR3_SDFME_SATA_PEX: Bitmask to set the SDFME field of SRDSCR3 to the
+ *			    value used by SATA and PCI Express
+ * @SRDSCR3_SDFM_SATA_PEX:  Combined bitmask to set both SDFM fields to the
+ *			    value used by SATA and PCI Express
+ * @SRDSCR3_SDTXLA_SATA:    Bitmask to set the SDTXLA field of SRDSCR3 to the
+ *			    value used by SATA
+ * @SRDSCR3_SDTXLE_SATA:    Bitmask to set the SDTXLE field of SRDSCR3 to the
+ *			    value used by SATA
+ * @SRDSCR3_SDTXL_SATA:     Combined bitmask to set both SDTXL fields to the
+ *			    value used by SATA
+ *
+ * KFRA = 'Kfr' gain selection in the CDR for lane A
+ * KFRE = 'Kfr' gain selection in the CDR for lane E
+ * SDFMA = Bandwidth of digital filter for lane A
+ * SDFME = Bandwidth of digital filter for lane E
+ * SDTXLA = Lane A transmitter amplitude levels
+ * SDTXLE = Lane E transmitter amplitude levels
+ */
+enum srdscr3_mask {
+	SRDSCR3_KFRA_SATA      = 0x10000000,
+	SRDSCR3_KFRE_SATA      = 0x00100000,
+	SRDSCR3_KFR_SATA       = SRDSCR3_KFRA_SATA | SRDSCR3_KFRE_SATA,
+
+	SRDSCR3_KPHA_SATA      = 0x04000000,
+	SRDSCR3_KPHE_SATA      = 0x00040000,
+	SRDSCR3_KPH_SATA       = SRDSCR3_KPHA_SATA | SRDSCR3_KPHE_SATA,
+
+	SRDSCR3_SDFMA_SATA_PEX = 0x01000000,
+	SRDSCR3_SDFME_SATA_PEX = 0x00010000,
+	SRDSCR3_SDFM_SATA_PEX  = SRDSCR3_SDFMA_SATA_PEX | SRDSCR3_SDFME_SATA_PEX,
+
+	SRDSCR3_SDTXLA_SATA    = 0x00000500,
+	SRDSCR3_SDTXLE_SATA    = 0x00000005,
+	SRDSCR3_SDTXL_SATA     = SRDSCR3_SDTXLA_SATA | SRDSCR3_SDTXLE_SATA,
+};
+
+/**
+ * enum srdscr4_mask - Bit masks for SRDSCR4 (SerDes Control Register 4)
+ * @SRDSCR4_PROTA_SATA:  Bitmask to set the PROTA field of SRDSCR4 to the
+ *			 value used by SATA
+ * @SRDSCR4_PROTE_SATA:  Bitmask to set the PROTE field of SRDSCR4 to the
+ *			 value used by SATA
+ * @SRDSCR4_PROT_SATA:   Combined bitmask to set both PROT fields to the
+ *			 value used by SATA
+ * @SRDSCR4_PROTA_PEX:   Bitmask to set the PROTA field of SRDSCR4 to the
+ *			 value used by PCI Express
+ * @SRDSCR4_PROTE_PEX:   Bitmask to set the PROTE field of SRDSCR4 to the
+ *			 value used by PCI Express
+ * @SRDSCR4_PROT_PEX:    Combined bitmask to set both PROT fields to the
+ *			 value used by PCI Express
+ * @SRDSCR4_PROTA_SGMII: Bitmask to set the PROTA field of SRDSCR4 to the
+ *			 value used by SGMII
+ * @SRDSCR4_PROTE_SGMII: Bitmask to set the PROTE field of SRDSCR4 to the
+ *			 value used by SGMII
+ * @SRDSCR4_PROT_SGMII:  Combined bitmask to set both PROT fields to the
+ *			 value used by SGMII
+ * @SRDSCR4_PLANE_X2:    Bitmask to set the PLANE field of SRDSCR4
+ * @SRDSCR4_RFCKS_100:   Bitmask to set the RFCKS field of SRDSCR4 to the
+ *			 value 100Mhz
+ * @SRDSCR4_RFCKS_125:   Bitmask to set the RFCKS field of SRDSCR4 to the
+ *			 value 125Mhz
+ * @SRDSCR4_RFCKS_150:   Bitmask to set the RFCKS field of SRDSCR4 to the
+ *			 value 150Mhz
+ *
+ * PROTA = Lane A protocol select
+ * PROTE = Lane E protocol select
+ * PLAME = Number of PCI Express lanes
+ */
+enum srdscr4_mask {
+	SRDSCR4_PROTA_SATA  = 0x00000800,
+	SRDSCR4_PROTE_SATA  = 0x00000008,
+	SRDSCR4_PROT_SATA   = SRDSCR4_PROTA_SATA | SRDSCR4_PROTE_SATA,
+
+	SRDSCR4_PROTA_PEX   = 0x00000100,
+	SRDSCR4_PROTE_PEX   = 0x00000001,
+	SRDSCR4_PROT_PEX    = SRDSCR4_PROTA_PEX | SRDSCR4_PROTE_PEX,
+
+	SRDSCR4_PROTA_SGMII = 0x00000500,
+	SRDSCR4_PROTE_SGMII = 0x00000005,
+	SRDSCR4_PROT_SGMII  = SRDSCR4_PROTA_SGMII | SRDSCR4_PROTE_SGMII,
+
+	SRDSCR4_PLANE_X2    = 0x01000000,
+
+	SRDSCR4_RFCKS_100 = (0 << 28),
+	SRDSCR4_RFCKS_125 = (1 << 28),
+	SRDSCR4_RFCKS_150 = (3 << 28),
+};
+
+/**
+ * enum srdsrstctl_mask - Bit masks for SRDSRSTCTL (SerDes Reset Control Register)
+ * @SRDSRSTCTL_RST:        Bitmask for the RST (Software reset) field of the
+ *			   SRDSRSTCTL
+ * @SRDSRSTCTL_SATA_RESET: Bitmask for the SATA_RESET (SATA reset) field of the
+ *			   SRDSRSTCTL
+ */
+enum srdsrstctl_mask {
+	SRDSRSTCTL_RST        = 0x80000000,
+	SRDSRSTCTL_SATA_RESET = 0xf,
+};
+
+/**
+ * struct mpc83xx_serdes_regs - Register map of the SerDes controller
+ * @srdscr0:    SerDes Control Register 0
+ * @srdscr1:    SerDes Control Register 1
+ * @srdscr2:    SerDes Control Register 2
+ * @srdscr3:    SerDes Control Register 3
+ * @srdscr4:    SerDes Control Register 4
+ * @fill0:      Reserved space in the register map
+ * @srdsrstctl: SerDes Reset Control Register
+ */
+struct mpc83xx_serdes_regs {
+	u32 srdscr0;
+	u32 srdscr1;
+	u32 srdscr2;
+	u32 srdscr3;
+	u32 srdscr4;
+	u8 fill0[12];
+	u32 srdsrstctl;
+};
+
+/**
+ * enum pex_type - Types of PCI Express
+ * @PEX_X1: PCI Express in x1 mode
+ * @PEX_X2: PCI Express in x2 mode
+ */
+enum pex_type {
+	PEX_X1,
+	PEX_X2,
+};