ARM: socfpga: Arria10: support programming FPGA in PBL

Some Arria10 boards don't have the FPGA programmed externally.
Instead barebox needs to do that. As the Arria10 has the SDRAM
controller in the FPGA, the first thing we need to do is,
configure the FPGA before the SDRAM can even be used.

It works like this:
  1. boot ROM fetches the PBL from MMC
  2. read the MBR from MMC (this depends on the setup done by the boot ROM)
  3. read the Bitstream from the MMC and program the FPGA
  4. re-read the barebox image from MMC, this time with the full barebox
     that is appended to the PBL
  5. jump into the full barebox

Only supported boot device is eMMC.

Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

5 files changed, 137 insertions, 2 deletions

diff --git a/arch/arm/mach-socfpga/include/mach/arria10-fpga.h b/arch/arm/mach-socfpga/include/mach/arria10-fpga.h
new file mode 100644
index 0000000000..0d957dedcf
--- /dev/null
+++ b/arch/arm/mach-socfpga/include/mach/arria10-fpga.h
@@ -0,0 +1,86 @@
+/*
+ * FPGA Manager Driver for Altera Arria10 SoCFPGA
+ *
+ * Copyright (C) 2015-2016 Altera Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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/>.
+ */
+
+#ifndef  __A10_FPGAMGR_H__
+#define	__A10_FPGAMGR_H__
+
+#include <linux/bitops.h>
+#include <mach/arria10-regs.h>
+
+#define A10_FPGAMGR_DCLKCNT_OFST				0x08
+#define A10_FPGAMGR_DCLKSTAT_OFST				0x0c
+#define A10_FPGAMGR_IMGCFG_CTL_00_OFST				0x70
+#define A10_FPGAMGR_IMGCFG_CTL_01_OFST				0x74
+#define A10_FPGAMGR_IMGCFG_CTL_02_OFST				0x78
+#define A10_FPGAMGR_IMGCFG_STAT_OFST				0x80
+
+#define A10_FPGAMGR_DCLKSTAT_DCLKDONE				BIT(0)
+
+#define A10_FPGAMGR_IMGCFG_CTL_00_S2F_NENABLE_NCONFIG		BIT(0)
+#define A10_FPGAMGR_IMGCFG_CTL_00_S2F_NENABLE_NSTATUS		BIT(1)
+#define A10_FPGAMGR_IMGCFG_CTL_00_S2F_NENABLE_CONDONE		BIT(2)
+#define A10_FPGAMGR_IMGCFG_CTL_00_S2F_NCONFIG			BIT(8)
+#define A10_FPGAMGR_IMGCFG_CTL_00_S2F_NSTATUS_OE		BIT(16)
+#define A10_FPGAMGR_IMGCFG_CTL_00_S2F_CONDONE_OE		BIT(24)
+
+#define A10_FPGAMGR_IMGCFG_CTL_01_S2F_NENABLE_CONFIG		BIT(0)
+#define A10_FPGAMGR_IMGCFG_CTL_01_S2F_PR_REQUEST		BIT(16)
+#define A10_FPGAMGR_IMGCFG_CTL_01_S2F_NCE			BIT(24)
+
+#define A10_FPGAMGR_IMGCFG_CTL_02_EN_CFG_CTRL			BIT(0)
+#define A10_FPGAMGR_IMGCFG_CTL_02_EN_CFG_DATA			BIT(8)
+#define A10_FPGAMGR_IMGCFG_CTL_02_CDRATIO_MASK			(BIT(16) | BIT(17))
+#define A10_FPGAMGR_IMGCFG_CTL_02_CDRATIO_SHIFT			16
+#define A10_FPGAMGR_IMGCFG_CTL_02_CFGWIDTH			BIT(24)
+#define A10_FPGAMGR_IMGCFG_CTL_02_CFGWIDTH_SHIFT		24
+
+#define A10_FPGAMGR_IMGCFG_STAT_F2S_CRC_ERROR			BIT(0)
+#define A10_FPGAMGR_IMGCFG_STAT_F2S_EARLY_USERMODE		BIT(1)
+#define A10_FPGAMGR_IMGCFG_STAT_F2S_USERMODE			BIT(2)
+#define A10_FPGAMGR_IMGCFG_STAT_F2S_NSTATUS_PIN			BIT(4)
+#define A10_FPGAMGR_IMGCFG_STAT_F2S_CONDONE_PIN			BIT(6)
+#define A10_FPGAMGR_IMGCFG_STAT_F2S_CONDONE_OE			BIT(7)
+#define A10_FPGAMGR_IMGCFG_STAT_F2S_PR_READY			BIT(9)
+#define A10_FPGAMGR_IMGCFG_STAT_F2S_PR_DONE			BIT(10)
+#define A10_FPGAMGR_IMGCFG_STAT_F2S_PR_ERROR			BIT(11)
+#define A10_FPGAMGR_IMGCFG_STAT_F2S_NCONFIG_PIN			BIT(12)
+#define A10_FPGAMGR_IMGCFG_STAT_F2S_MSEL_MASK			(BIT(16) | BIT(17) | BIT(18))
+#define A10_FPGAMGR_IMGCFG_STAT_F2S_MSEL_SHIFT		        16
+
+/* FPGA CD Ratio Value */
+#define CDRATIO_x1						0x0
+#define CDRATIO_x2						0x1
+#define CDRATIO_x4						0x2
+#define CDRATIO_x8						0x3
+
+/* Configuration width 16/32 bit */
+#define CFGWDTH_32						1
+#define CFGWDTH_16						0
+
+int inline a10_wait_for_usermode(int timeout) {
+	while ((readl(ARRIA10_FPGAMGRREGS_ADDR +
+		      A10_FPGAMGR_IMGCFG_STAT_OFST) &
+		(A10_FPGAMGR_IMGCFG_STAT_F2S_EARLY_USERMODE |
+		 A10_FPGAMGR_IMGCFG_STAT_F2S_USERMODE)) == 0)
+		if (timeout-- <= 0)
+			return -ETIMEDOUT;
+
+	return 0;
+}
+
+#endif
diff --git a/arch/arm/mach-socfpga/include/mach/arria10-system-manager.h b/arch/arm/mach-socfpga/include/mach/arria10-system-manager.h
index 20bd35270a..9117a93b18 100644
--- a/arch/arm/mach-socfpga/include/mach/arria10-system-manager.h
+++ b/arch/arm/mach-socfpga/include/mach/arria10-system-manager.h
@@ -52,6 +52,8 @@
 #define ARRIA10_SYSMGR_NOC_IDLESTATUS		(ARRIA10_SYSMGR_ADDR + 0xd4)
 #define ARRIA10_SYSMGR_FPGA2SOC_CTRL		(ARRIA10_SYSMGR_ADDR + 0xd8)
 
+#define ARRIA10_SYSMGR_ROM_INITSWLASTLD		(ARRIA10_SYSMGR_ADDR + 0x10)
+
 
 #define ARRIA10_SYSMGR_BOOTINFO_BSEL_MASK	0x00007000
 #define ARRIA10_SYSMGR_BOOTINFO_BSEL_SHIFT	12
diff --git a/arch/arm/mach-socfpga/include/mach/arria10-xload.h b/arch/arm/mach-socfpga/include/mach/arria10-xload.h
new file mode 100644
index 0000000000..71f8397362
--- /dev/null
+++ b/arch/arm/mach-socfpga/include/mach/arria10-xload.h
@@ -0,0 +1,13 @@
+#ifndef __MACH_ARRIA10_XLOAD_H
+#define __MACH_ARRIA10_XLOAD_H
+
+void arria10_init_mmc(void);
+int arria10_prepare_mmc(int barebox_part, int rbf_part);
+int arria10_read_blocks(void *dst, int blocknum, size_t len);
+
+struct partition {
+	uint64_t first_sec;
+	uint8_t type;
+};
+
+#endif /* __MACH_ARRIA10_XLOAD_H */
diff --git a/arch/arm/mach-socfpga/include/mach/debug_ll.h b/arch/arm/mach-socfpga/include/mach/debug_ll.h
index f41258c504..3264934e6d 100644
--- a/arch/arm/mach-socfpga/include/mach/debug_ll.h
+++ b/arch/arm/mach-socfpga/include/mach/debug_ll.h
@@ -40,8 +40,6 @@ static inline void INIT_LL(void)
 	unsigned int div = ns16550_calc_divisor(CONFIG_DEBUG_SOCFPGA_UART_CLOCK,
 						115200);
 
-	while ((readl(UART_BASE + LSR) & LSR_TEMT) == 0);
-
 	writel(0x00, UART_BASE + IER);
 
 	writel(LCR_BKSE, UART_BASE + LCR);
diff --git a/arch/arm/mach-socfpga/include/mach/generic.h b/arch/arm/mach-socfpga/include/mach/generic.h
index 5fcbc9ecf5..72391f3552 100644
--- a/arch/arm/mach-socfpga/include/mach/generic.h
+++ b/arch/arm/mach-socfpga/include/mach/generic.h
@@ -46,7 +46,43 @@ static inline void socfpga_cyclone5_qspi_init(void)
 }
 #endif
 #if defined(CONFIG_ARCH_SOCFPGA_ARRIA10)
+void socfpga_arria10_mmc_init(void);
+void socfpga_arria10_timer_init(void);
+int arria10_prepare_mmc(int barebox, int bitstream);
+void arria10_start_image(int offset);
+int arria10_load_fpga(int offset, int size);
+int arria10_device_init(struct arria10_mainpll_cfg *mainpll,
+			struct arria10_perpll_cfg *perpll,
+			uint32_t *pinmux);
 enum bootsource arria10_get_bootsource(void);
+#else
+static inline void socfpga_arria10_mmc_init(void)
+{
+	return;
+}
+
+static inline void socfpga_arria10_timer_init(void)
+{
+	return;
+}
+static void arria10_prepare_mmc(int barebox, int bitstream)
+{
+	return;
+}
+static void arria10_start_image(int offset)
+{
+	return;
+}
+static int arria10_load_fpga(int offset, int size)
+{
+	return;
+}
+static int arria10_device_init(struct arria10_mainpll_cfg *mainpll,
+			struct arria10_perpll_cfg *perpll,
+			uint32_t *pinmux)
+{
+	return 0;
+}
 #endif
 
 static inline void __udelay(unsigned us)