svn commit: r279677 - head/sys/arm/xilinx
Oleksandr Tymoshenko
gonzo at FreeBSD.org
Thu Mar 5 21:42:00 UTC 2015
Author: gonzo
Date: Thu Mar 5 21:41:58 2015
New Revision: 279677
URL: https://svnweb.freebsd.org/changeset/base/279677
Log:
Add sysctls to control PS-PL level shifters and FCLK settings.
PL (programmable logic) uses FCLK0..FCLK3 as a clock sources.
Normally they're configured by first stage boot loader (FSBL)
and normal user never has to touch them. These sysctls may come
useful for hardware developers
hw.fpga.fclk.N.source: clock source (IO, DDR, ARM)
hw.fpga.fclk.N.freq: requested frequency in Hz
hw.fpga.fclk.N.actual_freq: actual frequency in Hz (R/O)
hw.fgpa.level_shifters: 0/1 to enable/disable PS-PL level shifters,
normally they're enabled either by FSBL or after programming
FPGA through devcfg(4)
Modified:
head/sys/arm/xilinx/zy7_devcfg.c
head/sys/arm/xilinx/zy7_slcr.c
head/sys/arm/xilinx/zy7_slcr.h
Modified: head/sys/arm/xilinx/zy7_devcfg.c
==============================================================================
--- head/sys/arm/xilinx/zy7_devcfg.c Thu Mar 5 21:27:49 2015 (r279676)
+++ head/sys/arm/xilinx/zy7_devcfg.c Thu Mar 5 21:41:58 2015 (r279677)
@@ -72,10 +72,23 @@ struct zy7_devcfg_softc {
bus_dmamap_t dma_map;
int is_open;
+
+ struct sysctl_ctx_list sysctl_tree;
+ struct sysctl_oid *sysctl_tree_top;
};
static struct zy7_devcfg_softc *zy7_devcfg_softc_p;
+#define FCLK_NUM 4
+
+struct zy7_fclk_config {
+ int source;
+ int frequency;
+ int actual_frequency;
+};
+
+static struct zy7_fclk_config fclk_configs[FCLK_NUM];
+
#define DEVCFG_SC_LOCK(sc) mtx_lock(&(sc)->sc_mtx)
#define DEVCFG_SC_UNLOCK(sc) mtx_unlock(&(sc)->sc_mtx)
#define DEVCFG_SC_LOCK_INIT(sc) \
@@ -103,13 +116,17 @@ static int zy7_ps_vers = 0;
SYSCTL_INT(_hw, OID_AUTO, ps_vers, CTLFLAG_RD, &zy7_ps_vers, 0,
"Zynq-7000 PS version");
+static int zy7_devcfg_fclk_sysctl_level_shifters(SYSCTL_HANDLER_ARGS);
+SYSCTL_PROC(_hw_fpga, OID_AUTO, level_shifters,
+ CTLFLAG_RW | CTLTYPE_INT,
+ NULL, 0, zy7_devcfg_fclk_sysctl_level_shifters,
+ "I", "Enable/disable level shifters");
/* cdev entry points. */
static int zy7_devcfg_open(struct cdev *, int, int, struct thread *);
static int zy7_devcfg_write(struct cdev *, struct uio *, int);
static int zy7_devcfg_close(struct cdev *, int, int, struct thread *);
-
struct cdevsw zy7_devcfg_cdevsw = {
.d_version = D_VERSION,
.d_open = zy7_devcfg_open,
@@ -230,6 +247,151 @@ struct cdevsw zy7_devcfg_cdevsw = {
#define ZY7_DEVCFG_XADCIF_RD_FIFO 0x114
#define ZY7_DEVCFG_XADCIF_MCTL 0x118
+static int
+zy7_devcfg_fclk_sysctl_source(SYSCTL_HANDLER_ARGS)
+{
+ char buf[4];
+ struct zy7_fclk_config *cfg;
+ int unit;
+ int error;
+
+ cfg = arg1;
+ unit = arg2;
+
+ switch (cfg->source) {
+ case ZY7_PL_FCLK_SRC_IO:
+ case ZY7_PL_FCLK_SRC_IO_ALT:
+ strncpy(buf, "IO", sizeof(buf));
+ break;
+ case ZY7_PL_FCLK_SRC_DDR:
+ strncpy(buf, "DDR", sizeof(buf));
+ break;
+ case ZY7_PL_FCLK_SRC_ARM:
+ strncpy(buf, "ARM", sizeof(buf));
+ break;
+ default:
+ strncpy(buf, "???", sizeof(buf));
+ break;
+ }
+
+ error = sysctl_handle_string(oidp, buf, sizeof(buf), req);
+ if (error != 0 || req->newptr == NULL)
+ return (error);
+
+ if (strcasecmp(buf, "io") == 0)
+ cfg->source = ZY7_PL_FCLK_SRC_IO;
+ else if (strcasecmp(buf, "ddr") == 0)
+ cfg->source = ZY7_PL_FCLK_SRC_DDR;
+ else if (strcasecmp(buf, "arm") == 0)
+ cfg->source = ZY7_PL_FCLK_SRC_ARM;
+ else
+ return (EINVAL);
+
+ zy7_pl_fclk_set_source(unit, cfg->source);
+ if (cfg->frequency > 0)
+ cfg->actual_frequency = zy7_pl_fclk_get_freq(unit);
+
+ return (0);
+}
+
+static int
+zy7_devcfg_fclk_sysctl_freq(SYSCTL_HANDLER_ARGS)
+{
+ struct zy7_fclk_config *cfg;
+ int unit;
+ int error;
+ int freq;
+ int new_actual_freq;
+
+ cfg = arg1;
+ unit = arg2;
+
+ freq = cfg->frequency;
+
+ error = sysctl_handle_int(oidp, &freq, 0, req);
+ if (error != 0 || req->newptr == NULL)
+ return (error);
+
+ if (freq > 0) {
+ new_actual_freq = zy7_pl_fclk_set_freq(unit, freq);
+ if (new_actual_freq < 0)
+ return (EINVAL);
+ if (!zy7_pl_fclk_enabled(unit))
+ zy7_pl_fclk_enable(unit);
+ }
+ else {
+ zy7_pl_fclk_disable(unit);
+ new_actual_freq = 0;
+ }
+
+ cfg->frequency = freq;
+ cfg->actual_frequency = new_actual_freq;
+
+ return (0);
+}
+
+static int
+zy7_devcfg_fclk_sysctl_level_shifters(SYSCTL_HANDLER_ARGS)
+{
+ int error, enabled;
+
+ enabled = zy7_pl_level_shifters_enabled();
+
+ error = sysctl_handle_int(oidp, &enabled, 0, req);
+ if (error != 0 || req->newptr == NULL)
+ return (error);
+
+ if (enabled)
+ zy7_pl_level_shifters_enable();
+ else
+ zy7_pl_level_shifters_disable();
+
+ return (0);
+}
+
+static int
+zy7_devcfg_init_fclk_sysctl(struct zy7_devcfg_softc *sc)
+{
+ struct sysctl_oid *fclk_node;
+ char fclk_num[4];
+ int i;
+
+ sysctl_ctx_init(&sc->sysctl_tree);
+ sc->sysctl_tree_top = SYSCTL_ADD_NODE(&sc->sysctl_tree,
+ SYSCTL_STATIC_CHILDREN(_hw_fpga), OID_AUTO, "fclk",
+ CTLFLAG_RD, 0, "");
+ if (sc->sysctl_tree_top == NULL) {
+ sysctl_ctx_free(&sc->sysctl_tree);
+ return (-1);
+ }
+
+ for (i = 0; i < FCLK_NUM; i++) {
+ snprintf(fclk_num, sizeof(fclk_num), "%d", i);
+ fclk_node = SYSCTL_ADD_NODE(&sc->sysctl_tree,
+ SYSCTL_CHILDREN(sc->sysctl_tree_top), OID_AUTO, fclk_num,
+ CTLFLAG_RD, 0, "");
+
+ SYSCTL_ADD_INT(&sc->sysctl_tree,
+ SYSCTL_CHILDREN(fclk_node), OID_AUTO,
+ "actual_freq", CTLFLAG_RD,
+ &fclk_configs[i].actual_frequency, i,
+ "Actual frequency");
+ SYSCTL_ADD_PROC(&sc->sysctl_tree,
+ SYSCTL_CHILDREN(fclk_node), OID_AUTO,
+ "freq", CTLFLAG_RW | CTLTYPE_INT,
+ &fclk_configs[i], i,
+ zy7_devcfg_fclk_sysctl_freq,
+ "I", "Configured frequency");
+ SYSCTL_ADD_PROC(&sc->sysctl_tree,
+ SYSCTL_CHILDREN(fclk_node), OID_AUTO,
+ "source", CTLFLAG_RW | CTLTYPE_STRING,
+ &fclk_configs[i], i,
+ zy7_devcfg_fclk_sysctl_source,
+ "A", "Clock source");
+ }
+
+ return (0);
+}
/* Enable programming the PL through PCAP. */
static void
@@ -334,7 +496,6 @@ zy7_dma_cb2(void *arg, bus_dma_segment_t
*(bus_addr_t *)arg = seg[0].ds_addr;
}
-
static int
zy7_devcfg_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
{
@@ -474,10 +635,11 @@ zy7_devcfg_close(struct cdev *dev, int f
bus_dma_tag_destroy(sc->dma_tag);
DEVCFG_SC_UNLOCK(sc);
+ zy7_slcr_postload_pl(zy7_en_level_shifters);
+
return (0);
}
-
static void
zy7_devcfg_intr(void *arg)
{
@@ -549,6 +711,7 @@ static int
zy7_devcfg_attach(device_t dev)
{
struct zy7_devcfg_softc *sc = device_get_softc(dev);
+ int i;
int rid, err;
/* Allow only one attach. */
@@ -612,6 +775,17 @@ zy7_devcfg_attach(device_t dev)
ZY7_DEVCFG_MCTRL_PS_VERS_MASK) >>
ZY7_DEVCFG_MCTRL_PS_VERS_SHIFT;
+ for (i = 0; i < FCLK_NUM; i++) {
+ fclk_configs[i].source = zy7_pl_fclk_get_source(i);
+ fclk_configs[i].actual_frequency =
+ zy7_pl_fclk_enabled(i) ? zy7_pl_fclk_get_freq(i) : 0;
+ /* Initially assume actual frequency is the configure one */
+ fclk_configs[i].frequency = fclk_configs[i].actual_frequency;
+ }
+
+ if (zy7_devcfg_init_fclk_sysctl(sc) < 0)
+ device_printf(dev, "failed to initialized sysctl tree\n");
+
return (0);
}
@@ -620,6 +794,11 @@ zy7_devcfg_detach(device_t dev)
{
struct zy7_devcfg_softc *sc = device_get_softc(dev);
+ if (sc->sysctl_tree_top != NULL) {
+ sysctl_ctx_free(&sc->sysctl_tree);
+ sc->sysctl_tree_top = NULL;
+ }
+
if (device_is_attached(dev))
bus_generic_detach(dev);
Modified: head/sys/arm/xilinx/zy7_slcr.c
==============================================================================
--- head/sys/arm/xilinx/zy7_slcr.c Thu Mar 5 21:27:49 2015 (r279676)
+++ head/sys/arm/xilinx/zy7_slcr.c Thu Mar 5 21:41:58 2015 (r279677)
@@ -79,7 +79,6 @@ extern void (*zynq7_cpu_reset);
#define ZYNQ_DEFAULT_PS_CLK_FREQUENCY 33333333 /* 33.3 Mhz */
-
SYSCTL_NODE(_hw, OID_AUTO, zynq, CTLFLAG_RD, 0, "Xilinx Zynq-7000");
static char zynq_bootmode[64];
@@ -126,7 +125,6 @@ zy7_slcr_lock(struct zy7_slcr_softc *sc)
WR4(sc, ZY7_SLCR_LOCK, ZY7_SLCR_LOCK_MAGIC);
}
-
static void
zy7_slcr_cpu_reset(void)
{
@@ -255,6 +253,296 @@ cgem_set_ref_clk(int unit, int frequency
return (0);
}
+/*
+ * PL clocks management function
+ */
+int
+zy7_pl_fclk_set_source(int unit, int source)
+{
+ struct zy7_slcr_softc *sc = zy7_slcr_softc_p;
+ uint32_t reg;
+
+ if (!sc)
+ return (-1);
+
+ ZSLCR_LOCK(sc);
+
+ /* Unlock SLCR registers. */
+ zy7_slcr_unlock(sc);
+
+ /* Modify FPGAx source. */
+ reg = RD4(sc, ZY7_SLCR_FPGA_CLK_CTRL(unit));
+ reg &= ~(ZY7_SLCR_FPGA_CLK_CTRL_SRCSEL_MASK);
+ reg |= (source << ZY7_SLCR_FPGA_CLK_CTRL_SRCSEL_SHIFT);
+ WR4(sc, ZY7_SLCR_FPGA_CLK_CTRL(unit), reg);
+
+ /* Lock SLCR registers. */
+ zy7_slcr_lock(sc);
+
+ ZSLCR_UNLOCK(sc);
+
+ return (0);
+}
+
+int
+zy7_pl_fclk_get_source(int unit)
+{
+ struct zy7_slcr_softc *sc = zy7_slcr_softc_p;
+ uint32_t reg;
+ int source;
+
+ if (!sc)
+ return (-1);
+
+ ZSLCR_LOCK(sc);
+
+ /* Modify GEM reference clock. */
+ reg = RD4(sc, ZY7_SLCR_FPGA_CLK_CTRL(unit));
+ source = (reg & ZY7_SLCR_FPGA_CLK_CTRL_SRCSEL_MASK) >>
+ ZY7_SLCR_FPGA_CLK_CTRL_SRCSEL_SHIFT;
+
+ /* ZY7_PL_FCLK_SRC_IO is actually b0x */
+ if ((source & 2) == 0)
+ source = ZY7_PL_FCLK_SRC_IO;
+
+ ZSLCR_UNLOCK(sc);
+
+ return (source);
+}
+
+int
+zy7_pl_fclk_set_freq(int unit, int frequency)
+{
+ struct zy7_slcr_softc *sc = zy7_slcr_softc_p;
+ int div0, div1;
+ int base_frequency;
+ uint32_t reg;
+ int source;
+
+ if (!sc)
+ return (-1);
+
+ source = zy7_pl_fclk_get_source(unit);
+ switch (source) {
+ case ZY7_PL_FCLK_SRC_IO:
+ base_frequency = io_pll_frequency;
+ break;
+
+ case ZY7_PL_FCLK_SRC_ARM:
+ base_frequency = arm_pll_frequency;
+ break;
+
+ case ZY7_PL_FCLK_SRC_DDR:
+ base_frequency = ddr_pll_frequency;
+ break;
+
+ default:
+ return (-1);
+ }
+
+ /* Find suitable divisor pairs. Round result to nearest khz
+ * to test for match.
+ */
+ for (div1 = 1; div1 <= ZY7_SLCR_FPGA_CLK_CTRL_DIVISOR_MAX; div1++) {
+ div0 = (base_frequency + div1 * frequency / 2) /
+ div1 / frequency;
+ if (div0 > 0 && div0 <= ZY7_SLCR_FPGA_CLK_CTRL_DIVISOR_MAX &&
+ ((base_frequency / div0 / div1) + 500) / 1000 ==
+ (frequency + 500) / 1000)
+ break;
+ }
+
+ if (div1 > ZY7_SLCR_FPGA_CLK_CTRL_DIVISOR_MAX)
+ return (-1);
+
+ ZSLCR_LOCK(sc);
+
+ /* Unlock SLCR registers. */
+ zy7_slcr_unlock(sc);
+
+ /* Modify FPGAx reference clock. */
+ reg = RD4(sc, ZY7_SLCR_FPGA_CLK_CTRL(unit));
+ reg &= ~(ZY7_SLCR_FPGA_CLK_CTRL_DIVISOR1_MASK |
+ ZY7_SLCR_FPGA_CLK_CTRL_DIVISOR0_MASK);
+ reg |= (div1 << ZY7_SLCR_FPGA_CLK_CTRL_DIVISOR1_SHIFT) |
+ (div0 << ZY7_SLCR_FPGA_CLK_CTRL_DIVISOR0_SHIFT);
+ WR4(sc, ZY7_SLCR_FPGA_CLK_CTRL(unit), reg);
+
+ /* Lock SLCR registers. */
+ zy7_slcr_lock(sc);
+
+ ZSLCR_UNLOCK(sc);
+
+ return (base_frequency / div0 / div1);
+}
+
+int
+zy7_pl_fclk_get_freq(int unit)
+{
+ struct zy7_slcr_softc *sc = zy7_slcr_softc_p;
+ int div0, div1;
+ int base_frequency;
+ int frequency;
+ uint32_t reg;
+ int source;
+
+ if (!sc)
+ return (-1);
+
+ source = zy7_pl_fclk_get_source(unit);
+ switch (source) {
+ case ZY7_PL_FCLK_SRC_IO:
+ base_frequency = io_pll_frequency;
+ break;
+
+ case ZY7_PL_FCLK_SRC_ARM:
+ base_frequency = arm_pll_frequency;
+ break;
+
+ case ZY7_PL_FCLK_SRC_DDR:
+ base_frequency = ddr_pll_frequency;
+ break;
+
+ default:
+ return (-1);
+ }
+
+ ZSLCR_LOCK(sc);
+
+ /* Modify FPGAx reference clock. */
+ reg = RD4(sc, ZY7_SLCR_FPGA_CLK_CTRL(unit));
+ div1 = (reg & ZY7_SLCR_FPGA_CLK_CTRL_DIVISOR1_MASK) >>
+ ZY7_SLCR_FPGA_CLK_CTRL_DIVISOR1_SHIFT;
+ div0 = (reg & ZY7_SLCR_FPGA_CLK_CTRL_DIVISOR0_MASK) >>
+ ZY7_SLCR_FPGA_CLK_CTRL_DIVISOR0_SHIFT;
+
+ ZSLCR_UNLOCK(sc);
+
+ if (div0 == 0)
+ div0 = 1;
+
+ if (div1 == 0)
+ div1 = 1;
+
+ frequency = (base_frequency / div0 / div1);
+ /* Round to KHz */
+ frequency = (frequency + 500) / 1000;
+ frequency = frequency * 1000;
+
+ return (frequency);
+}
+
+int
+zy7_pl_fclk_enable(int unit)
+{
+ struct zy7_slcr_softc *sc = zy7_slcr_softc_p;
+
+ if (!sc)
+ return (-1);
+
+ ZSLCR_LOCK(sc);
+
+ /* Unlock SLCR registers. */
+ zy7_slcr_unlock(sc);
+
+ WR4(sc, ZY7_SLCR_FPGA_THR_CTRL(unit), 0);
+ WR4(sc, ZY7_SLCR_FPGA_THR_CNT(unit), 0);
+
+ /* Lock SLCR registers. */
+ zy7_slcr_lock(sc);
+
+ ZSLCR_UNLOCK(sc);
+
+ return (0);
+}
+
+int
+zy7_pl_fclk_disable(int unit)
+{
+ struct zy7_slcr_softc *sc = zy7_slcr_softc_p;
+
+ if (!sc)
+ return (-1);
+
+ ZSLCR_LOCK(sc);
+
+ /* Unlock SLCR registers. */
+ zy7_slcr_unlock(sc);
+
+ WR4(sc, ZY7_SLCR_FPGA_THR_CTRL(unit), 0);
+ WR4(sc, ZY7_SLCR_FPGA_THR_CNT(unit), 1);
+
+ /* Lock SLCR registers. */
+ zy7_slcr_lock(sc);
+
+ ZSLCR_UNLOCK(sc);
+
+ return (0);
+}
+
+int
+zy7_pl_fclk_enabled(int unit)
+{
+ struct zy7_slcr_softc *sc = zy7_slcr_softc_p;
+ uint32_t reg;
+
+ if (!sc)
+ return (-1);
+
+ ZSLCR_LOCK(sc);
+ reg = RD4(sc, ZY7_SLCR_FPGA_THR_CNT(unit));
+ ZSLCR_UNLOCK(sc);
+
+ return !(reg & 1);
+}
+
+int
+zy7_pl_level_shifters_enabled()
+{
+ struct zy7_slcr_softc *sc = zy7_slcr_softc_p;
+
+ uint32_t reg;
+
+ if (!sc)
+ return (-1);
+
+ ZSLCR_LOCK(sc);
+ reg = RD4(sc, ZY7_SLCR_LVL_SHFTR_EN);
+ ZSLCR_UNLOCK(sc);
+
+ return (reg == ZY7_SLCR_LVL_SHFTR_EN_ALL);
+}
+
+void
+zy7_pl_level_shifters_enable()
+{
+ struct zy7_slcr_softc *sc = zy7_slcr_softc_p;
+
+ if (!sc)
+ return;
+
+ ZSLCR_LOCK(sc);
+ zy7_slcr_unlock(sc);
+ WR4(sc, ZY7_SLCR_LVL_SHFTR_EN, ZY7_SLCR_LVL_SHFTR_EN_ALL);
+ zy7_slcr_lock(sc);
+ ZSLCR_UNLOCK(sc);
+}
+
+void
+zy7_pl_level_shifters_disable()
+{
+ struct zy7_slcr_softc *sc = zy7_slcr_softc_p;
+
+ if (!sc)
+ return;
+
+ ZSLCR_LOCK(sc);
+ zy7_slcr_unlock(sc);
+ WR4(sc, ZY7_SLCR_LVL_SHFTR_EN, 0);
+ zy7_slcr_lock(sc);
+ ZSLCR_UNLOCK(sc);
+}
+
static int
zy7_slcr_probe(device_t dev)
{
Modified: head/sys/arm/xilinx/zy7_slcr.h
==============================================================================
--- head/sys/arm/xilinx/zy7_slcr.h Thu Mar 5 21:27:49 2015 (r279676)
+++ head/sys/arm/xilinx/zy7_slcr.h Thu Mar 5 21:41:58 2015 (r279677)
@@ -37,7 +37,6 @@
* are in appendix B.28.
*/
-
#ifndef _ZY7_SLCR_H_
#define _ZY7_SLCR_H_
@@ -148,10 +147,19 @@
#define ZY7_SLCR_DBG_CLK_CTRL 0x0164
#define ZY7_SLCR_PCAP_CLK_CTRL 0x0168
#define ZY7_SLCR_TOPSW_CLK_CTRL 0x016c /* central intercnn clk ctrl */
-#define ZY7_SLCR_FPGA0_CLK_CTRL 0x0170
-#define ZY7_SLCR_FPGA1_CLK_CTRL 0x0180
-#define ZY7_SLCR_FPGA2_CLK_CTRL 0x0190
-#define ZY7_SLCR_FPGA3_CLK_CTRL 0x01a0
+#define ZY7_SLCR_FPGA_CLK_CTRL(unit) (0x0170 + 0x10*(unit))
+#define ZY7_SLCR_FPGA_CLK_CTRL_DIVISOR1_SHIFT 20
+#define ZY7_SLCR_FPGA_CLK_CTRL_DIVISOR1_MASK (0x3f << 20)
+#define ZY7_SLCR_FPGA_CLK_CTRL_DIVISOR0_SHIFT 8
+#define ZY7_SLCR_FPGA_CLK_CTRL_DIVISOR0_MASK (0x3f << 8)
+#define ZY7_SLCR_FPGA_CLK_CTRL_DIVISOR_MAX 0x3f
+#define ZY7_SLCR_FPGA_CLK_CTRL_SRCSEL_SHIFT 4
+#define ZY7_SLCR_FPGA_CLK_CTRL_SRCSEL_MASK (3 << 4)
+#define ZY7_SLCR_FPGA_THR_CTRL(unit) (0x0174 + 0x10*(unit))
+#define ZY7_SLCR_FPGA_THR_CTRL_CNT_RST (1 << 1)
+#define ZY7_SLCR_FPGA_THR_CTRL_CPU_START (1 << 0)
+#define ZY7_SLCR_FPGA_THR_CNT(unit) (0x0178 + 0x10*(unit))
+#define ZY7_SLCR_FPGA_THR_STA(unit) (0x017c + 0x10*(unit))
#define ZY7_SLCR_CLK_621_TRUE 0x01c4 /* cpu clock ratio mode */
/* Reset controls. */
@@ -288,5 +296,23 @@
extern void zy7_slcr_preload_pl(void);
extern void zy7_slcr_postload_pl(int en_level_shifters);
extern int cgem_set_ref_clk(int unit, int frequency);
+
+/* Should be consistent with SRCSEL field of FPGAx_CLK_CTRL */
+#define ZY7_PL_FCLK_SRC_IO 0
+#define ZY7_PL_FCLK_SRC_IO_ALT 1 /* ZY7_PL_FCLK_SRC_IO is b0x */
+#define ZY7_PL_FCLK_SRC_ARM 2
+#define ZY7_PL_FCLK_SRC_DDR 3
+
+int zy7_pl_fclk_set_source(int unit, int source);
+int zy7_pl_fclk_get_source(int unit);
+int zy7_pl_fclk_set_freq(int unit, int freq);
+int zy7_pl_fclk_get_freq(int unit);
+int zy7_pl_fclk_enable(int unit);
+int zy7_pl_fclk_disable(int unit);
+int zy7_pl_fclk_enabled(int unit);
+int zy7_pl_level_shifters_enabled(void);
+void zy7_pl_level_shifters_enable(void);
+void zy7_pl_level_shifters_disable(void);
+
#endif
#endif /* _ZY7_SLCR_H_ */
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