Adding upstream version 2.8.0+dfsg.upstream/2.8.0+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

2 files changed, 126 insertions, 0 deletions

diff --git a/drivers/renesas/rcar/cpld/ulcb_cpld.c b/drivers/renesas/rcar/cpld/ulcb_cpld.c
new file mode 100644
index 0000000..5ffb2e1
--- /dev/null
+++ b/drivers/renesas/rcar/cpld/ulcb_cpld.c
@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 2018, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <lib/mmio.h>
+#include "ulcb_cpld.h"
+
+#define SCLK			8	/* GP_6_8 */
+#define SSTBZ			3	/* GP_2_3 */
+#define MOSI			7	/* GP_6_7 */
+
+#define CPLD_ADDR_RESET		0x80	/* RW */
+
+/* LSI Multiplexed Pin Setting Mask Register */
+#define PFC_PMMR		0xE6060000
+
+/* General output registers */
+#define GPIO_OUTDT2		0xE6052008
+#define GPIO_OUTDT6		0xE6055408
+
+/* General input/output switching registers */
+#define GPIO_INOUTSEL2		0xE6052004
+#define GPIO_INOUTSEL6		0xE6055404
+
+/* General IO/Interrupt Switching Register */
+#define GPIO_IOINTSEL6		0xE6055400
+
+/* GPIO/perihperal function select */
+#define PFC_GPSR2		0xE6060108
+#define PFC_GPSR6		0xE6060118
+
+static void gpio_set_value(uint32_t addr, uint8_t gpio, uint32_t val)
+{
+	uint32_t reg;
+
+	reg = mmio_read_32(addr);
+	if (val)
+		reg |= (1 << gpio);
+	else
+		reg &= ~(1 << gpio);
+	mmio_write_32(addr, reg);
+}
+
+static void gpio_direction_output(uint32_t addr, uint8_t gpio)
+{
+	uint32_t reg;
+
+	reg = mmio_read_32(addr);
+	reg |= (1 << gpio);
+	mmio_write_32(addr, reg);
+}
+
+static void gpio_pfc(uint32_t addr, uint8_t gpio)
+{
+	uint32_t reg;
+
+	reg = mmio_read_32(addr);
+	reg &= ~(1 << gpio);
+	mmio_write_32(PFC_PMMR, ~reg);
+	mmio_write_32(addr, reg);
+}
+
+static void cpld_write(uint8_t addr, uint32_t data)
+{
+	int i;
+
+	for (i = 0; i < 32; i++) {
+		/* MSB first */
+		gpio_set_value(GPIO_OUTDT6, MOSI, data & (1U << 31));
+		gpio_set_value(GPIO_OUTDT6, SCLK, 1);
+		data <<= 1;
+		gpio_set_value(GPIO_OUTDT6, SCLK, 0);
+	}
+
+	for (i = 0; i < 8; i++) {
+		/* MSB first */
+		gpio_set_value(GPIO_OUTDT6, MOSI, addr & 0x80);
+		gpio_set_value(GPIO_OUTDT6, SCLK, 1);
+		addr <<= 1;
+		gpio_set_value(GPIO_OUTDT6, SCLK, 0);
+	}
+
+	/* WRITE */
+	gpio_set_value(GPIO_OUTDT6, MOSI, 1);
+	gpio_set_value(GPIO_OUTDT2, SSTBZ, 0);
+	gpio_set_value(GPIO_OUTDT6, SCLK, 1);
+	gpio_set_value(GPIO_OUTDT6, SCLK, 0);
+	gpio_set_value(GPIO_OUTDT2, SSTBZ, 1);
+}
+
+static void cpld_init(void)
+{
+	gpio_pfc(PFC_GPSR6, SCLK);
+	gpio_pfc(PFC_GPSR2, SSTBZ);
+	gpio_pfc(PFC_GPSR6, MOSI);
+
+	gpio_set_value(GPIO_IOINTSEL6, SCLK, 0);
+	gpio_set_value(GPIO_OUTDT6, SCLK, 0);
+	gpio_set_value(GPIO_OUTDT2, SSTBZ, 1);
+	gpio_set_value(GPIO_OUTDT6, MOSI, 0);
+
+	gpio_direction_output(GPIO_INOUTSEL6, SCLK);
+	gpio_direction_output(GPIO_INOUTSEL2, SSTBZ);
+	gpio_direction_output(GPIO_INOUTSEL6, MOSI);
+}
+
+void rcar_cpld_reset_cpu(void)
+{
+	cpld_init();
+
+	cpld_write(CPLD_ADDR_RESET, 1);
+}
diff --git a/drivers/renesas/rcar/cpld/ulcb_cpld.h b/drivers/renesas/rcar/cpld/ulcb_cpld.h
new file mode 100644
index 0000000..1616d71
--- /dev/null
+++ b/drivers/renesas/rcar/cpld/ulcb_cpld.h
@@ -0,0 +1,12 @@
+/*
+ * Copyright (c) 2018, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef RCAR_ULCB_CPLD_H__
+#define RCAR_ULCB_CPLD_H__
+
+extern void rcar_cpld_reset_cpu(void);
+
+#endif /* RCAR_ULCB_CPLD_H__ */