[RFC PATCH] soc: zynqmp: Add support for tap delay settings
From: Manish Narani
Date: Mon Feb 12 2018 - 05:35:28 EST
This patch add support for tep delays programming for zynqmp platform.
This also adds dll reset support.
Signed-off-by: Manish Narani <mnarani@xxxxxxxxxx>
---
drivers/soc/xilinx/Kconfig | 6 +-
drivers/soc/xilinx/Makefile | 2 +
drivers/soc/xilinx/zynqmp/Makefile | 4 +
drivers/soc/xilinx/zynqmp/tap_delays.c | 270 +++++++++++++++++++++++++++
include/linux/soc/xilinx/zynqmp/tap_delays.h | 31 +++
5 files changed, 312 insertions(+), 1 deletion(-)
create mode 100644 drivers/soc/xilinx/zynqmp/Makefile
create mode 100644 drivers/soc/xilinx/zynqmp/tap_delays.c
create mode 100644 include/linux/soc/xilinx/zynqmp/tap_delays.h
diff --git a/drivers/soc/xilinx/Kconfig b/drivers/soc/xilinx/Kconfig
index 687c8f3..aa49859 100644
--- a/drivers/soc/xilinx/Kconfig
+++ b/drivers/soc/xilinx/Kconfig
@@ -1,4 +1,8 @@
-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: GPL-2.0+
+# Kconfig for Xilinx firmwares
+
+source "drivers/firmware/xilinx/zynqmp/Kconfig"
+
menu "Xilinx SoC drivers"
config XILINX_VCU
diff --git a/drivers/soc/xilinx/Makefile b/drivers/soc/xilinx/Makefile
index dee8fd5..5440b34 100644
--- a/drivers/soc/xilinx/Makefile
+++ b/drivers/soc/xilinx/Makefile
@@ -1,2 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_XILINX_VCU) += xlnx_vcu.o
+
+obj-$(CONFIG_ARCH_ZYNQMP) += zynqmp/
diff --git a/drivers/soc/xilinx/zynqmp/Makefile b/drivers/soc/xilinx/zynqmp/Makefile
new file mode 100644
index 0000000..b33b031
--- /dev/null
+++ b/drivers/soc/xilinx/zynqmp/Makefile
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0+
+# Makefile for Xilinx zynqmp SoC
+
+obj-$(CONFIG_ARCH_ZYNQMP) += tap_delays.o
diff --git a/drivers/soc/xilinx/zynqmp/tap_delays.c b/drivers/soc/xilinx/zynqmp/tap_delays.c
new file mode 100644
index 0000000..d74fc6f
--- /dev/null
+++ b/drivers/soc/xilinx/zynqmp/tap_delays.c
@@ -0,0 +1,270 @@
+/*
+ * Xilinx Zynq MPSoC Tap Delay Programming
+ *
+ * Copyright (C) 2016 Xilinx, 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, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/delay.h>
+#include <linux/types.h>
+#include <linux/soc/xilinx/zynqmp/tap_delays.h>
+
+#define SD0_ITAPDLYSEL_HSD 0x15
+#define SD0_ITAPDLYSEL_SD_DDR50 0x3D
+#define SD0_ITAPDLYSEL_MMC_DDR50 0x12
+#define SD1_ITAPDLYSEL_HSD 0x15
+#define SD1_ITAPDLYSEL_SD_DDR50 0x3D
+#define SD1_ITAPDLYSEL_MMC_DDR50 0x12
+
+#define SD0_OTAPDLYSEL_MMC_HSD 0x06
+#define SD0_OTAPDLYSEL_SD_HSD 0x05
+#define SD0_OTAPDLYSEL_SDR50 0x03
+#define SD0_OTAPDLYSEL_SDR104_B0 0x03
+#define SD0_OTAPDLYSEL_SDR104_B2 0x02
+#define SD0_OTAPDLYSEL_SD_DDR50 0x04
+#define SD0_OTAPDLYSEL_MMC_DDR50 0x06
+#define SD1_OTAPDLYSEL_MMC_HSD 0x06
+#define SD1_OTAPDLYSEL_SD_HSD 0x05
+#define SD1_OTAPDLYSEL_SDR50 0x03
+#define SD1_OTAPDLYSEL_SDR104_B0 0x03
+#define SD1_OTAPDLYSEL_SDR104_B2 0x02
+#define SD1_OTAPDLYSEL_SD_DDR50 0x04
+#define SD1_OTAPDLYSEL_MMC_DDR50 0x06
+
+#define MMC_BANK2 0x2
+
+#define MMC_TIMING_MMC_HS 1
+#define MMC_TIMING_SD_HS 2
+#define MMC_TIMING_UHS_SDR25 4
+#define MMC_TIMING_UHS_SDR50 5
+#define MMC_TIMING_UHS_SDR104 6
+#define MMC_TIMING_UHS_DDR50 7
+#define MMC_TIMING_MMC_DDR52 8
+#define MMC_TIMING_MMC_HS200 9
+
+/**
+ * arasan_zynqmp_tap_sdr104 - Program the tap delys for HS and SDR25 modes.
+ * @deviceid: Unique Id of device
+ * @timing: timing specification used
+ * @bank: MIO bank for SDIO
+ */
+static void arasan_zynqmp_tap_hs(u8 deviceid, u8 timing, u8 bank)
+{
+ const struct zynqmp_eemi_ops *eemi_ops = get_eemi_ops();
+
+ if (!eemi_ops || !eemi_ops->ioctl)
+ return;
+
+ if (deviceid == 0) {
+ eemi_ops->ioctl(NODE_SD_0, IOCTL_SET_SD_TAPDELAY,
+ PM_TAPDELAY_INPUT, SD0_ITAPDLYSEL_HSD, NULL);
+ if (timing == MMC_TIMING_MMC_HS)
+ eemi_ops->ioctl(NODE_SD_0, IOCTL_SET_SD_TAPDELAY,
+ PM_TAPDELAY_OUTPUT,
+ SD0_OTAPDLYSEL_MMC_HSD,
+ NULL);
+ else
+ eemi_ops->ioctl(NODE_SD_0, IOCTL_SET_SD_TAPDELAY,
+ PM_TAPDELAY_OUTPUT,
+ SD0_OTAPDLYSEL_SD_HSD,
+ NULL);
+ } else {
+ eemi_ops->ioctl(NODE_SD_1, IOCTL_SET_SD_TAPDELAY,
+ PM_TAPDELAY_INPUT, SD1_ITAPDLYSEL_HSD, NULL);
+ if (timing == MMC_TIMING_MMC_HS)
+ eemi_ops->ioctl(NODE_SD_1, IOCTL_SET_SD_TAPDELAY,
+ PM_TAPDELAY_OUTPUT,
+ SD1_OTAPDLYSEL_MMC_HSD,
+ NULL);
+ else
+ eemi_ops->ioctl(NODE_SD_1, IOCTL_SET_SD_TAPDELAY,
+ PM_TAPDELAY_OUTPUT,
+ SD1_OTAPDLYSEL_SD_HSD,
+ NULL);
+ }
+}
+
+/**
+ * arasan_zynqmp_tap_ddr50 - Program the tap delys for DDR50 and DDR52 modes.
+ * @deviceid: Unique Id of device
+ * @timing: timing specification used
+ * @bank: MIO bank for SDIO
+ */
+static void arasan_zynqmp_tap_ddr50(u8 deviceid, u8 timing, u8 bank)
+{
+ const struct zynqmp_eemi_ops *eemi_ops = get_eemi_ops();
+
+ if (!eemi_ops || !eemi_ops->ioctl)
+ return;
+
+ if (deviceid == 0) {
+ if (timing == MMC_TIMING_UHS_DDR50) {
+ eemi_ops->ioctl(NODE_SD_0, IOCTL_SET_SD_TAPDELAY,
+ PM_TAPDELAY_INPUT,
+ SD0_ITAPDLYSEL_SD_DDR50,
+ NULL);
+ eemi_ops->ioctl(NODE_SD_0, IOCTL_SET_SD_TAPDELAY,
+ PM_TAPDELAY_OUTPUT,
+ SD0_OTAPDLYSEL_SD_DDR50,
+ NULL);
+ } else {
+ eemi_ops->ioctl(NODE_SD_0, IOCTL_SET_SD_TAPDELAY,
+ PM_TAPDELAY_INPUT,
+ SD0_ITAPDLYSEL_MMC_DDR50,
+ NULL);
+ eemi_ops->ioctl(NODE_SD_0, IOCTL_SET_SD_TAPDELAY,
+ PM_TAPDELAY_OUTPUT,
+ SD0_OTAPDLYSEL_MMC_DDR50,
+ NULL);
+ }
+ } else {
+ if (timing == MMC_TIMING_UHS_DDR50) {
+ eemi_ops->ioctl(NODE_SD_1, IOCTL_SET_SD_TAPDELAY,
+ PM_TAPDELAY_INPUT,
+ SD1_ITAPDLYSEL_SD_DDR50,
+ NULL);
+ eemi_ops->ioctl(NODE_SD_1, IOCTL_SET_SD_TAPDELAY,
+ PM_TAPDELAY_OUTPUT,
+ SD1_OTAPDLYSEL_SD_DDR50,
+ NULL);
+ } else {
+ eemi_ops->ioctl(NODE_SD_1, IOCTL_SET_SD_TAPDELAY,
+ PM_TAPDELAY_INPUT,
+ SD1_ITAPDLYSEL_MMC_DDR50,
+ NULL);
+ eemi_ops->ioctl(NODE_SD_1, IOCTL_SET_SD_TAPDELAY,
+ PM_TAPDELAY_OUTPUT,
+ SD1_OTAPDLYSEL_MMC_DDR50,
+ NULL);
+ }
+ }
+}
+
+/**
+ * arasan_zynqmp_tap_sdr50 - Program the tap delys for SDR50 mode.
+ * @deviceid: Unique Id of device
+ * @timing: timing specification used
+ * @bank: MIO bank for SDIO
+ */
+static void arasan_zynqmp_tap_sdr50(u8 deviceid, u8 timing, u8 bank)
+{
+ const struct zynqmp_eemi_ops *eemi_ops = get_eemi_ops();
+
+ if (!eemi_ops || !eemi_ops->ioctl)
+ return;
+
+ if (deviceid == 0) {
+ eemi_ops->ioctl(NODE_SD_0, IOCTL_SET_SD_TAPDELAY,
+ PM_TAPDELAY_OUTPUT,
+ SD0_OTAPDLYSEL_SDR50,
+ NULL);
+ } else {
+ /* Program OTAP */
+ eemi_ops->ioctl(NODE_SD_1, IOCTL_SET_SD_TAPDELAY,
+ PM_TAPDELAY_OUTPUT,
+ SD1_OTAPDLYSEL_SDR50,
+ NULL);
+ }
+}
+
+/**
+ * arasan_zynqmp_tap_sdr104 - Program the tap delys for SDR104 and HS200 modes.
+ * @deviceid: Unique Id of device
+ * @timing: timing specification used
+ * @bank: MIO bank for SDIO
+ */
+static void arasan_zynqmp_tap_sdr104(u8 deviceid, u8 timing, u8 bank)
+{
+ const struct zynqmp_eemi_ops *eemi_ops = get_eemi_ops();
+
+ if (!eemi_ops || !eemi_ops->ioctl)
+ return;
+
+ if (deviceid == 0) {
+ /* Program OTAP */
+ if (bank == MMC_BANK2)
+ eemi_ops->ioctl(NODE_SD_0, IOCTL_SET_SD_TAPDELAY,
+ PM_TAPDELAY_OUTPUT,
+ SD0_OTAPDLYSEL_SDR104_B2,
+ NULL);
+ else
+ eemi_ops->ioctl(NODE_SD_0, IOCTL_SET_SD_TAPDELAY,
+ PM_TAPDELAY_OUTPUT,
+ SD0_OTAPDLYSEL_SDR104_B0,
+ NULL);
+ } else {
+ /* Program OTAP */
+ if (bank == MMC_BANK2)
+ eemi_ops->ioctl(NODE_SD_1, IOCTL_SET_SD_TAPDELAY,
+ PM_TAPDELAY_OUTPUT,
+ SD1_OTAPDLYSEL_SDR104_B2,
+ NULL);
+ else
+ eemi_ops->ioctl(NODE_SD_1, IOCTL_SET_SD_TAPDELAY,
+ PM_TAPDELAY_OUTPUT,
+ SD1_OTAPDLYSEL_SDR104_B0,
+ NULL);
+ }
+}
+
+/**
+ * arasan_zynqmp_set_tap_delay - Program the tap delys based on the mmc timing.
+ * @deviceid: Unique Id of device
+ * @timing: Timing specification used
+ * @bank: MIO bank for SDIO
+ */
+void arasan_zynqmp_set_tap_delay(u8 deviceid, u8 timing, u8 bank)
+{
+ switch (timing) {
+ case MMC_TIMING_SD_HS:
+ case MMC_TIMING_MMC_HS:
+ case MMC_TIMING_UHS_SDR25:
+ arasan_zynqmp_tap_hs(deviceid, timing, bank);
+ break;
+ case MMC_TIMING_UHS_SDR50:
+ arasan_zynqmp_tap_sdr50(deviceid, timing, bank);
+ break;
+ case MMC_TIMING_UHS_SDR104:
+ case MMC_TIMING_MMC_HS200:
+ arasan_zynqmp_tap_sdr104(deviceid, timing, bank);
+ break;
+ case MMC_TIMING_UHS_DDR50:
+ case MMC_TIMING_MMC_DDR52:
+ arasan_zynqmp_tap_ddr50(deviceid, timing, bank);
+ break;
+ }
+}
+EXPORT_SYMBOL_GPL(arasan_zynqmp_set_tap_delay);
+
+/**
+ * arasan_zynqmp_dll_reset - Issue the DLL reset.
+ * @deviceid: Unique Id of device
+ */
+void zynqmp_dll_reset(u8 deviceid)
+{
+ const struct zynqmp_eemi_ops *eemi_ops = get_eemi_ops();
+
+ if (!eemi_ops || !eemi_ops->ioctl)
+ return;
+
+ /* Issue DLL Reset */
+ if (deviceid == 0)
+ eemi_ops->ioctl(NODE_SD_0, IOCTL_SD_DLL_RESET,
+ PM_DLL_RESET_PULSE, 0, NULL);
+ else
+ eemi_ops->ioctl(NODE_SD_1, IOCTL_SD_DLL_RESET,
+ PM_DLL_RESET_PULSE, 0, NULL);
+}
+EXPORT_SYMBOL_GPL(zynqmp_dll_reset);
diff --git a/include/linux/soc/xilinx/zynqmp/tap_delays.h b/include/linux/soc/xilinx/zynqmp/tap_delays.h
new file mode 100644
index 0000000..6eb7328
--- /dev/null
+++ b/include/linux/soc/xilinx/zynqmp/tap_delays.h
@@ -0,0 +1,31 @@
+/*
+ * Xilinx Zynq MPSoC Power Management
+ *
+ * Copyright (C) 2016 Xilinx
+ *
+ * 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, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/firmware/xilinx/zynqmp/firmware.h>
+
+#ifdef CONFIG_ARCH_ZYNQMP
+/* API for programming the tap delays */
+void arasan_zynqmp_set_tap_delay(u8 deviceid, u8 timing, u8 bank);
+
+/* API to reset the DLL */
+void zynqmp_dll_reset(u8 deviceid);
+#else
+inline void arasan_zynqmp_set_tap_delay(u8 deviceid, u8 timing, u8 bank) {}
+inline void zynqmp_dll_reset(u8 deviceid) {}
+#endif
--
2.7.4
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