[U-Boot] [PATCH v5 3/3] apf27: add FPGA support for the apf27 board

Philippe Reynes
2013-08-27T17:12:33Z

Signed-off-by: Philippe Reynes <tremyfr@yahoo.fr>
Signed-off-by: Eric Jarrige <eric.jarrige@armadeus.org>
---
board/armadeus/apf27/Makefile | 3 +
board/armadeus/apf27/apf27.c | 5 +
board/armadeus/apf27/fpga.c | 223 +++++++++++++++++++++++++++++++++++++++++
board/armadeus/apf27/fpga.h | 25 +++++
include/configs/apf27.h | 14 +++
5 files changed, 270 insertions(+), 0 deletions(-)
create mode 100644 board/armadeus/apf27/fpga.c
create mode 100644 board/armadeus/apf27/fpga.h

diff --git a/board/armadeus/apf27/Makefile b/board/armadeus/apf27/Makefile
index ec0cb03..5fcda6e 100644
--- a/board/armadeus/apf27/Makefile
+++ b/board/armadeus/apf27/Makefile
@@ -13,6 +13,9 @@ LIB = $(obj)lib$(BOARD).o

COBJS := apf27.o
SOBJS := lowlevel_init.o
+ifdef CONFIG_FPGA
+COBJS += fpga.o
+endif

SRCS := $(COBJS:.o=.c) $(SOBJS:.o=.S)
OBJS := $(addprefix $(obj),$(COBJS))
diff --git a/board/armadeus/apf27/apf27.c b/board/armadeus/apf27/apf27.c
index 98c51a7..cd08bf4 100644
--- a/board/armadeus/apf27/apf27.c
+++ b/board/armadeus/apf27/apf27.c
@@ -19,6 +19,7 @@
#include <asm/errno.h>
#include "apf27.h"
#include "crc.h"
+#include "fpga.h"

DECLARE_GLOBAL_DATA_PTR;

@@ -181,6 +182,10 @@ int board_init(void)
apf27_setup_port();
apf27_iomux_init();
apf27_devices_init();
+#if defined(CONFIG_FPGA)
+ APF27_init_fpga();
+#endif
+

return 0;
}
diff --git a/board/armadeus/apf27/fpga.c b/board/armadeus/apf27/fpga.c
new file mode 100644
index 0000000..df2ddc2
--- /dev/null
+++ b/board/armadeus/apf27/fpga.c
@@ -0,0 +1,223 @@
+/*
+ * (C) Copyright 2002-2013
+ * Eric Jarrige <eric.jarrige@armadeus.org>
+ *
+ * based on the files by
+ * Rich Ireland, Enterasys Networks, rireland at enterasys.com
+ * and
+ * Keith Outwater, keith_outwater at mvis.com
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+#include <common.h>
+
+#include <asm/arch/imx-regs.h>
+#include <asm/gpio.h>
+#include <asm/io.h>
+#include <command.h>
+#include <config.h>
+#include "fpga.h"
+#include <spartan3.h>
+#include "apf27.h"
+
+/*
+ * Note that these are pointers to code that is in Flash. They will be
+ * relocated at runtime.
+ * Spartan2 code is used to download our Spartan 3 :) code is compatible.
+ * Just take care about the file size
+ */
+Xilinx_Spartan3_Slave_Parallel_fns fpga_fns = {
+ fpga_pre_fn,
+ fpga_pgm_fn,
+ fpga_init_fn,
+ NULL,
+ fpga_done_fn,
+ fpga_clk_fn,
+ fpga_cs_fn,
+ fpga_wr_fn,
+ fpga_rdata_fn,
+ fpga_wdata_fn,
+ fpga_busy_fn,
+ fpga_abort_fn,
+ fpga_post_fn,
+};
+
+Xilinx_desc fpga[CONFIG_FPGA_COUNT] = {
+ {Xilinx_Spartan3,
+ slave_parallel,
+ 1196128l/8,
+ (void *)&fpga_fns,
+ 0}
+};
+
+/*
+ * Initialize GPIO port B before download
+ */
+int fpga_pre_fn(int cookie)
+{
+ /* Initialize GPIO pins */
+ gpio_set_value(ACFG_FPGA_PWR, 1);
+ imx_gpio_mode(ACFG_FPGA_INIT | GPIO_IN | GPIO_PUEN | GPIO_GPIO);
+ imx_gpio_mode(ACFG_FPGA_DONE | GPIO_IN | GPIO_PUEN | GPIO_GPIO);
+ imx_gpio_mode(ACFG_FPGA_PRG | GPIO_OUT | GPIO_PUEN | GPIO_GPIO);
+ imx_gpio_mode(ACFG_FPGA_CLK | GPIO_OUT | GPIO_PUEN | GPIO_GPIO);
+ imx_gpio_mode(ACFG_FPGA_RW | GPIO_OUT | GPIO_PUEN | GPIO_GPIO);
+ imx_gpio_mode(ACFG_FPGA_CS | GPIO_OUT | GPIO_PUEN | GPIO_GPIO);
+ imx_gpio_mode(ACFG_FPGA_SUSPEND|GPIO_OUT|GPIO_PUEN|GPIO_GPIO);
+ gpio_set_value(ACFG_FPGA_RESET, 1);
+ imx_gpio_mode(ACFG_FPGA_RESET | GPIO_OUT | GPIO_PUEN | GPIO_GPIO);
+ imx_gpio_mode(ACFG_FPGA_PWR | GPIO_OUT | GPIO_PUEN | GPIO_GPIO);
+ gpio_set_value(ACFG_FPGA_PRG, 1);
+ gpio_set_value(ACFG_FPGA_CLK, 1);
+ gpio_set_value(ACFG_FPGA_RW, 1);
+ gpio_set_value(ACFG_FPGA_CS, 1);
+ gpio_set_value(ACFG_FPGA_SUSPEND, 0);
+ gpio_set_value(ACFG_FPGA_PWR, 0);
+ udelay(30000); /*wait until supply started*/
+
+ return cookie;
+}
+
+/*
+ * Set the FPGA's active-low program line to the specified level
+ */
+int fpga_pgm_fn(int assert, int flush, int cookie)
+{
+ debug("%s:%d: FPGA PROGRAM %s", __func__, __LINE__,
+ assert ? "high" : "low");
+ gpio_set_value(ACFG_FPGA_PRG, !assert);
+ return assert;
+}
+
+/*
+ * Set the FPGA's active-high clock line to the specified level
+ */
+int fpga_clk_fn(int assert_clk, int flush, int cookie)
+{
+ debug("%s:%d: FPGA CLOCK %s", __func__, __LINE__,
+ assert_clk ? "high" : "low");
+ gpio_set_value(ACFG_FPGA_CLK, !assert_clk);
+ return assert_clk;
+}
+
+/*
+ * Test the state of the active-low FPGA INIT line. Return 1 on INIT
+ * asserted (low).
+ */
+int fpga_init_fn(int cookie)
+{
+ int value;
+ debug("%s:%d: INIT check... ", __func__, __LINE__);
+ value = gpio_get_value(ACFG_FPGA_INIT);
+ /* printf("init value read %x",value); */
+#ifdef CONFIG_SYS_FPGA_IS_PROTO
+ return value;
+#else
+ return !value;
+#endif
+}
+
+/*
+ * Test the state of the active-high FPGA DONE pin
+ */
+int fpga_done_fn(int cookie)
+{
+ debug("%s:%d: DONE check... %s", __func__, __LINE__,
+ gpio_get_value(ACFG_FPGA_DONE) ? "high" : "low");
+ return gpio_get_value(ACFG_FPGA_DONE) ? FPGA_SUCCESS : FPGA_FAIL;
+}
+
+/*
+ * Set the FPGA's wr line to the specified level
+ */
+int fpga_wr_fn(int assert_write, int flush, int cookie)
+{
+ debug("%s:%d: FPGA RW... %s ", __func__, __LINE__,
+ assert_write ? "high" : "low");
+ gpio_set_value(ACFG_FPGA_RW, !assert_write);
+ return assert_write;
+}
+
+int fpga_cs_fn(int assert_cs, int flush, int cookie)
+{
+ debug("%s:%d: FPGA CS %s ", __func__, __LINE__,
+ assert_cs ? "high" : "low");
+ gpio_set_value(ACFG_FPGA_CS, !assert_cs);
+ return assert_cs;
+}
+
+int fpga_rdata_fn(unsigned char *data, int cookie)
+{
+ debug("%s:%d: FPGA READ DATA %02X ", __func__, __LINE__,
+ *((char *)ACFG_FPGA_RDATA));
+ *data = (unsigned char)
+ ((*((unsigned short *)ACFG_FPGA_RDATA))&0x00FF);
+ return *data;
+}
+
+int fpga_wdata_fn(unsigned char data, int flush, int cookie)
+{
+ debug("%s:%d: FPGA WRITE DATA %02X ", __func__, __LINE__,
+ data);
+ *((unsigned short *)ACFG_FPGA_WDATA) = data;
+ return data;
+}
+
+int fpga_abort_fn(int cookie)
+{
+ return fpga_post_fn(cookie);
+}
+
+
+int fpga_busy_fn(int cookie)
+{
+ return 1;
+}
+
+int fpga_post_fn(int cookie)
+{
+ debug("%s:%d: FPGA POST ", __func__, __LINE__);
+
+ imx_gpio_mode(ACFG_FPGA_RW | GPIO_PF | GPIO_PUEN);
+ imx_gpio_mode(ACFG_FPGA_CS | GPIO_PF | GPIO_PUEN);
+ imx_gpio_mode(ACFG_FPGA_CLK | GPIO_PF | GPIO_PUEN);
+ gpio_set_value(ACFG_FPGA_PRG, 1);
+ gpio_set_value(ACFG_FPGA_RESET, 0);
+ imx_gpio_mode(ACFG_FPGA_RESET | GPIO_OUT | GPIO_PUEN | GPIO_GPIO);
+ return cookie;
+}
+
+void apf27_fpga_setup(void)
+{
+ struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
+ struct system_control_regs *system =
+ (struct system_control_regs *)IMX_SYSTEM_CTL_BASE;
+
+ /* Configure FPGA CLKO */
+ writel(ACFG_CCSR_VAL, &pll->ccsr);
+
+ /* Configure strentgh for FPGA */
+ writel(ACFG_DSCR10_VAL, &system->dscr10);
+ writel(ACFG_DSCR3_VAL, &system->dscr3);
+ writel(ACFG_DSCR7_VAL, &system->dscr7);
+ writel(ACFG_DSCR2_VAL, &system->dscr2);
+}
+
+/*
+ * Initialize the fpga. Return 1 on success, 0 on failure.
+ */
+void APF27_init_fpga(void)
+{
+ int i;
+
+ apf27_fpga_setup();
+
+ fpga_init();
+
+ for (i = 0; i < CONFIG_FPGA_COUNT; i++) {
+ debug("%s:%d: Adding fpga %d\n", __func__, __LINE__, i);
+ fpga_add(fpga_xilinx, &fpga[i]);
+ }
+
+ return;
+}
diff --git a/board/armadeus/apf27/fpga.h b/board/armadeus/apf27/fpga.h
new file mode 100644
index 0000000..84a5244
--- /dev/null
+++ b/board/armadeus/apf27/fpga.h
@@ -0,0 +1,25 @@
+/*
+ * (C) Copyright 2002-2013
+ * Eric Jarrige <eric.jarrige@armadeus.org>
+ *
+ * based on the files by
+ * Rich Ireland, Enterasys Networks, rireland at enterasys.com
+ * and
+ * Keith Outwater, keith_outwater at mvis.com
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+extern void APF27_init_fpga(void);
+
+extern int fpga_pre_fn(int cookie);
+extern int fpga_pgm_fn(int assert_pgm, int flush, int cookie);
+extern int fpga_cs_fn(int assert_cs, int flush, int cookie);
+extern int fpga_init_fn(int cookie);
+extern int fpga_done_fn(int cookie);
+extern int fpga_clk_fn(int assert_clk, int flush, int cookie);
+extern int fpga_wr_fn(int assert_write, int flush, int cookie);
+extern int fpga_rdata_fn(unsigned char *data, int cookie);
+extern int fpga_wdata_fn(unsigned char data, int flush, int cookie);
+extern int fpga_abort_fn(int cookie);
+extern int fpga_post_fn(int cookie);
+extern int fpga_busy_fn(int cookie);
diff --git a/include/configs/apf27.h b/include/configs/apf27.h
index 447be8d..37d8258 100644
--- a/include/configs/apf27.h
+++ b/include/configs/apf27.h
@@ -292,6 +292,20 @@
#define CONFIG_MII /* MII PHY management */

/*
+ * FPGA
+ */
+#ifndef CONFIG_SPL_BUILD
+#define CONFIG_FPGA
+#endif
+#define CONFIG_FPGA_COUNT 1
+#define CONFIG_FPGA_XILINX
+#define CONFIG_FPGA_SPARTAN3
+#define CONFIG_SYS_FPGA_WAIT 250 /* 250 ms s */
+#define CONFIG_SYS_FPGA_PROG_FEEDBACK
+#define CONFIG_SYS_FPGA_CHECK_CTRLC
+#define CONFIG_SYS_FPGA_CHECK_ERROR
+
+/*
* Fuses - IIM
*/
#ifdef CONFIG_CMD_IMX_FUSE
--
1.7.4.4