[U-Boot] [PATCH 8/8] misc: Add MPC83xx serdes driver
Mario Six
mario.six at gdsys.cc
Wed Mar 28 12:38:32 UTC 2018
Add a driver to configure the SerDes (Serializer/Deserializer) lanes on
the MPC83xx architecture.
Signed-off-by: Mario Six <mario.six at gdsys.cc>
---
arch/powerpc/cpu/mpc83xx/serdes.c | 4 +
arch/powerpc/include/asm/fsl_mpc83xx_serdes.h | 4 +
drivers/misc/Kconfig | 5 +
drivers/misc/Makefile | 1 +
drivers/misc/mpc83xx_serdes.c | 229 ++++++++++++++++++++++++++
5 files changed, 243 insertions(+)
create mode 100644 drivers/misc/mpc83xx_serdes.c
diff --git a/arch/powerpc/cpu/mpc83xx/serdes.c b/arch/powerpc/cpu/mpc83xx/serdes.c
index a0bc477dc3..67b9f152d1 100644
--- a/arch/powerpc/cpu/mpc83xx/serdes.c
+++ b/arch/powerpc/cpu/mpc83xx/serdes.c
@@ -9,6 +9,8 @@
* SPDX-License-Identifier: GPL-2.0+
*/
+#ifndef CONFIG_MPC83XX_SERDES
+
#include <config.h>
#include <common.h>
#include <asm/io.h>
@@ -149,3 +151,5 @@ void fsl_setup_serdes(u32 offset, char proto, u32 rfcks, char vdd)
tmp |= FSL_SRDSRSTCTL_RST;
out_be32(regs + FSL_SRDSRSTCTL_OFFS, tmp);
}
+
+#endif /* !CONFIG_MPC83XX_SERDES */
diff --git a/arch/powerpc/include/asm/fsl_mpc83xx_serdes.h b/arch/powerpc/include/asm/fsl_mpc83xx_serdes.h
index 5a06a09567..a66c878c1f 100644
--- a/arch/powerpc/include/asm/fsl_mpc83xx_serdes.h
+++ b/arch/powerpc/include/asm/fsl_mpc83xx_serdes.h
@@ -7,6 +7,8 @@
#ifndef __FSL_MPC83XX_SERDES_H
#define __FSL_MPC83XX_SERDES_H
+#ifndef CONFIG_MPC83XX_SERDES
+
#include <config.h>
#define FSL_SERDES_CLK_100 (0 << 28)
@@ -20,4 +22,6 @@
extern void fsl_setup_serdes(u32 offset, char proto, u32 rfcks, char vdd);
+#endif /* !CONFIG_MPC83XX_SERDES */
+
#endif /* __FSL_MPC83XX_SERDES_H */
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index d774569cbc..1afb003444 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -263,5 +263,10 @@ config SYS_I2C_EEPROM_ADDR_OVERFLOW
endif
+config MPC83XX_SERDES
+ bool "Enable MPC83xx serdes driver"
+ depends on MISC
+ help
+ Support for serdes found on MPC83xx SoCs.
endmenu
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index e8d598cd47..30bc30b9eb 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -54,3 +54,4 @@ obj-$(CONFIG_QFW) += qfw.o
obj-$(CONFIG_ROCKCHIP_EFUSE) += rockchip-efuse.o
obj-$(CONFIG_STM32_RCC) += stm32_rcc.o
obj-$(CONFIG_SYS_DPAA_QBMAN) += fsl_portals.o
+obj-$(CONFIG_MPC83XX_SERDES) += mpc83xx_serdes.o
diff --git a/drivers/misc/mpc83xx_serdes.c b/drivers/misc/mpc83xx_serdes.c
new file mode 100644
index 0000000000..ea538dfd11
--- /dev/null
+++ b/drivers/misc/mpc83xx_serdes.c
@@ -0,0 +1,229 @@
+/*
+ * (C) Copyright 2018
+ * Mario Six, Guntermann & Drunck GmbH, mario.six at gdsys.cc
+ *
+ * base on the MPC83xx serdes initialization, which is
+ *
+ * Copyright 2007,2011 Freescale Semiconductor, Inc.
+ * Copyright (C) 2008 MontaVista Software, Inc.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <misc.h>
+#include <mapmem.h>
+
+enum {
+ SRDSCR0_DPP_1V2 = 0x00008800,
+
+ SRDSCR0_TXEQA_MASK = 0x00007000,
+ SRDSCR0_TXEQA_SATA = 0x00001000,
+ SRDSCR0_TXEQE_MASK = 0x00000700,
+ SRDSCR0_TXEQE_SATA = 0x00000100,
+};
+
+enum {
+ SRDSCR1_PLLBW = 0x00000040
+};
+
+enum {
+ SRDSCR2_VDD_1V2 = 0x00800000,
+
+ SRDSCR2_SEIC_MASK = 0x00001c1c,
+ SRDSCR2_SEIC_SATA = 0x00001414,
+ SRDSCR2_SEIC_PEX = 0x00001010,
+ SRDSCR2_SEIC_SGMII = 0x00000101,
+};
+
+enum {
+ SRDSCR3_KFR_SATA = 0x10100000,
+ SRDSCR3_KPH_SATA = 0x04040000,
+ SRDSCR3_SDFM_SATA_PEX = 0x01010000,
+ SRDSCR3_SDTXL_SATA = 0x00000505,
+};
+
+enum {
+ SRDSCR4_PROT_SATA = 0x00000808,
+ SRDSCR4_PROT_PEX = 0x00000101,
+ SRDSCR4_PROT_SGMII = 0x00000505,
+
+ SRDSCR4_PLANE_X2 = 0x01000000,
+};
+
+enum {
+ SRDSRSTCTL_RST = 0x80000000,
+ SRDSRSTCTL_SATA_RESET = 0xf,
+};
+
+enum {
+ SERDES_CLK_100 = (0 << 28),
+ SERDES_CLK_125 = (1 << 28),
+ SERDES_CLK_150 = (3 << 28),
+};
+
+struct mpc83xx_serdes_regs {
+ u32 srdscr0;
+ u32 srdscr1;
+ u32 srdscr2;
+ u32 srdscr3;
+ u32 srdscr4;
+ u8 fill0[12];
+ u32 srdsrstctl;
+};
+
+enum pex_type {
+ PEX_X1,
+ PEX_X2,
+};
+
+struct mpc83xx_serdes_priv {
+ struct mpc83xx_serdes_regs *regs;
+ u32 rfcks;
+};
+
+static const struct misc_ops mpc83xx_serdes_ops = {
+};
+
+void setup_sata(struct udevice *dev)
+{
+ struct mpc83xx_serdes_priv *priv = dev_get_priv(dev);
+
+ /* Set and clear reset bits */
+ setbits_be32(&priv->regs->srdsrstctl, SRDSRSTCTL_SATA_RESET);
+ udelay(1000);
+ clrbits_be32(&priv->regs->srdsrstctl, SRDSRSTCTL_SATA_RESET);
+
+ /* Configure SRDSCR0 */
+ clrsetbits_be32(&priv->regs->srdscr0,
+ SRDSCR0_TXEQA_MASK | SRDSCR0_TXEQE_MASK,
+ SRDSCR0_TXEQA_SATA | SRDSCR0_TXEQE_SATA);
+
+ /* Configure SRDSCR1 */
+ clrbits_be32(&priv->regs->srdscr1, SRDSCR1_PLLBW);
+
+ /* Configure SRDSCR2 */
+ clrsetbits_be32(&priv->regs->srdscr2,
+ SRDSCR2_SEIC_MASK,
+ SRDSCR2_SEIC_SATA);
+
+ /* Configure SRDSCR3 */
+ out_be32(&priv->regs->srdscr3,
+ SRDSCR3_KFR_SATA | SRDSCR3_KPH_SATA |
+ SRDSCR3_SDFM_SATA_PEX | SRDSCR3_SDTXL_SATA);
+
+ /* Configure SRDSCR4 */
+ out_be32(&priv->regs->srdscr4, priv->rfcks | SRDSCR4_PROT_SATA);
+}
+
+void setup_pex(struct udevice *dev, enum pex_type type)
+{
+ struct mpc83xx_serdes_priv *priv = dev_get_priv(dev);
+
+ /* Configure SRDSCR1 */
+ setbits_be32(&priv->regs->srdscr1, SRDSCR1_PLLBW);
+
+ /* Configure SRDSCR2 */
+ clrsetbits_be32(&priv->regs->srdscr2,
+ SRDSCR2_SEIC_MASK,
+ SRDSCR2_SEIC_PEX);
+
+ /* Configure SRDSCR3 */
+ out_be32(&priv->regs->srdscr3, SRDSCR3_SDFM_SATA_PEX);
+
+ /* Configure SRDSCR4 */
+ if (type == PEX_X2)
+ out_be32(&priv->regs->srdscr4,
+ priv->rfcks | SRDSCR4_PROT_PEX | SRDSCR4_PLANE_X2);
+ else
+ out_be32(&priv->regs->srdscr4,
+ priv->rfcks | SRDSCR4_PROT_PEX);
+}
+
+void setup_sgmii(struct udevice *dev)
+{
+ struct mpc83xx_serdes_priv *priv = dev_get_priv(dev);
+
+ /* Configure SRDSCR1 */
+ clrbits_be32(&priv->regs->srdscr1, SRDSCR1_PLLBW);
+
+ /* Configure SRDSCR2 */
+ clrsetbits_be32(&priv->regs->srdscr2,
+ SRDSCR2_SEIC_MASK,
+ SRDSCR2_SEIC_SGMII);
+
+ /* Configure SRDSCR3 */
+ out_be32(&priv->regs->srdscr3, 0);
+
+ /* Configure SRDSCR4 */
+ out_be32(&priv->regs->srdscr4, priv->rfcks | SRDSCR4_PROT_SGMII);
+}
+
+int mpc83xx_serdes_probe(struct udevice *dev)
+{
+ struct mpc83xx_serdes_priv *priv = dev_get_priv(dev);
+ bool vdd;
+ const char *proto;
+
+ priv->regs = map_sysmem(dev_read_addr(dev),
+ sizeof(struct mpc83xx_serdes_regs));
+
+ vdd = dev_read_bool(dev, "vdd");
+
+ switch (dev_read_u32_default(dev, "serdes-clk", -1)) {
+ case 100:
+ priv->rfcks = SERDES_CLK_100;
+ break;
+ case 125:
+ priv->rfcks = SERDES_CLK_125;
+ break;
+ case 150:
+ priv->rfcks = SERDES_CLK_150;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* 1.0V corevdd */
+ if (vdd) {
+ /* DPPE/DPPA = 0 */
+ clrbits_be32(&priv->regs->srdscr0, SRDSCR0_DPP_1V2);
+
+ /* VDD = 0 */
+ clrbits_be32(&priv->regs->srdscr0, SRDSCR2_VDD_1V2);
+ }
+
+ proto = dev_read_string(dev, "proto");
+
+ /* protocol specific configuration */
+ if (!strcmp(proto, "sata"))
+ setup_sata(dev);
+ else if (!strcmp(proto, "pex"))
+ setup_pex(dev, PEX_X1);
+ else if (!strcmp(proto, "pex-x2"))
+ setup_pex(dev, PEX_X2);
+ else if (!strcmp(proto, "sgmii"))
+ setup_sgmii(dev);
+ else
+ return -EINVAL;
+
+ /* Do a software reset */
+ setbits_be32(&priv->regs->srdsrstctl, SRDSRSTCTL_RST);
+
+ return 0;
+}
+
+static const struct udevice_id mpc83xx_serdes_ids[] = {
+ { .compatible = "fsl,mpc83xx-serdes" },
+ { }
+};
+
+U_BOOT_DRIVER(mpc83xx_serdes) = {
+ .name = "mpc83xx_serdes",
+ .id = UCLASS_MISC,
+ .ops = &mpc83xx_serdes_ops,
+ .of_match = mpc83xx_serdes_ids,
+ .probe = mpc83xx_serdes_probe,
+ .priv_auto_alloc_size = sizeof(struct mpc83xx_serdes_priv),
+};
--
2.16.1
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