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arm: socfpga: Restructure FPGA driver in the preparation to support A10

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Move FPGA driver which is Gen5 specific code into Gen5 driver file
and keeping common FPGA driver intact. All the changes are still keeping
in driver/fpga/ and no functional change. Subsequent patch would move
FPGA manager driver from arch/arm into driver/fpga/.

Signed-off-by: Tien Fong Chee <tien.fong.chee@intel.com>
Reviewed-by: Ley Foon Tan <ley.foon.tan@intel.com>
Reviewed-by: Dinh Nguyen <dinguyen@kernel.org>
This commit is contained in:
Tien Fong Chee 2017-07-26 13:05:38 +08:00 committed by Marek Vasut
parent 6a34af5b41
commit 6867e19a43
6 changed files with 337 additions and 291 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm/mach-socfpga/Makefile
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@ -9,7 +9,6 @@
obj-y += board.o
obj-y += clock_manager.o
obj-y += fpga_manager.o
obj-y += misc.o
obj-y += reset_manager.o
obj-y += timer.o
@ -21,6 +20,7 @@ obj-y += reset_manager_gen5.o
obj-y += scan_manager.o
obj-y += system_manager_gen5.o
obj-y += wrap_pll_config.o
obj-y += fpga_manager.o
endif
ifdef CONFIG_TARGET_SOCFPGA_ARRIA10

70
arch/arm/mach-socfpga/include/mach/fpga_manager.h
View File

@ -1,5 +1,5 @@
/*
* Copyright (C) 2012 Altera Corporation <www.altera.com>
* Copyright (C) 2012-2017 Altera Corporation <www.altera.com>
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
@ -10,58 +10,9 @@
#include <altera.h>
struct socfpga_fpga_manager {
/* FPGA Manager Module */
u32 stat; /* 0x00 */
u32 ctrl;
u32 dclkcnt;
u32 dclkstat;
u32 gpo; /* 0x10 */
u32 gpi;
u32 misci; /* 0x18 */
u32 _pad_0x1c_0x82c[517];
/* Configuration Monitor (MON) Registers */
u32 gpio_inten; /* 0x830 */
u32 gpio_intmask;
u32 gpio_inttype_level;
u32 gpio_int_polarity;
u32 gpio_intstatus; /* 0x840 */
u32 gpio_raw_intstatus;
u32 _pad_0x848;
u32 gpio_porta_eoi;
u32 gpio_ext_porta; /* 0x850 */
u32 _pad_0x854_0x85c[3];
u32 gpio_1s_sync; /* 0x860 */
u32 _pad_0x864_0x868[2];
u32 gpio_ver_id_code;
u32 gpio_config_reg2; /* 0x870 */
u32 gpio_config_reg1;
};
#define FPGAMGRREGS_STAT_MODE_MASK 0x7
#define FPGAMGRREGS_STAT_MSEL_MASK 0xf8
#define FPGAMGRREGS_STAT_MSEL_LSB 3
#define FPGAMGRREGS_CTRL_CFGWDTH_MASK 0x200
#define FPGAMGRREGS_CTRL_AXICFGEN_MASK 0x100
#define FPGAMGRREGS_CTRL_NCONFIGPULL_MASK 0x4
#define FPGAMGRREGS_CTRL_NCE_MASK 0x2
#define FPGAMGRREGS_CTRL_EN_MASK 0x1
#define FPGAMGRREGS_CTRL_CDRATIO_LSB 6
#define FPGAMGRREGS_MON_GPIO_EXT_PORTA_CRC_MASK 0x8
#define FPGAMGRREGS_MON_GPIO_EXT_PORTA_ID_MASK 0x4
#define FPGAMGRREGS_MON_GPIO_EXT_PORTA_CD_MASK 0x2
#define FPGAMGRREGS_MON_GPIO_EXT_PORTA_NS_MASK 0x1
/* FPGA Mode */
#define FPGAMGRREGS_MODE_FPGAOFF 0x0
#define FPGAMGRREGS_MODE_RESETPHASE 0x1
#define FPGAMGRREGS_MODE_CFGPHASE 0x2
#define FPGAMGRREGS_MODE_INITPHASE 0x3
#define FPGAMGRREGS_MODE_USERMODE 0x4
#define FPGAMGRREGS_MODE_UNKNOWN 0x5
#if defined(CONFIG_TARGET_SOCFPGA_GEN5)
#include <asm/arch/fpga_manager_gen5.h>
#endif
/* FPGA CD Ratio Value */
#define CDRATIO_x1 0x0
@ -69,9 +20,14 @@ struct socfpga_fpga_manager {
#define CDRATIO_x4 0x2
#define CDRATIO_x8 0x3
/* SoCFPGA support functions */
int fpgamgr_test_fpga_ready(void);
int fpgamgr_poll_fpga_ready(void);
int fpgamgr_get_mode(void);
#ifndef __ASSEMBLY__
/* Common prototypes */
int fpgamgr_get_mode(void);
int fpgamgr_poll_fpga_ready(void);
void fpgamgr_program_write(const void *rbf_data, size_t rbf_size);
int fpgamgr_test_fpga_ready(void);
int fpgamgr_dclkcnt_set(unsigned long cnt);
#endif /* __ASSEMBLY__ */
#endif /* _FPGA_MANAGER_H_ */

68
arch/arm/mach-socfpga/include/mach/fpga_manager_gen5.h Normal file
View File

@ -0,0 +1,68 @@
/*
* Copyright (C) 2012-2017 Altera Corporation <www.altera.com>
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef _FPGA_MANAGER_GEN5_H_
#define _FPGA_MANAGER_GEN5_H_
#define FPGAMGRREGS_STAT_MODE_MASK 0x7
#define FPGAMGRREGS_STAT_MSEL_MASK 0xf8
#define FPGAMGRREGS_STAT_MSEL_LSB 3
#define FPGAMGRREGS_CTRL_CFGWDTH_MASK BIT(9)
#define FPGAMGRREGS_CTRL_AXICFGEN_MASK BIT(8)
#define FPGAMGRREGS_CTRL_NCONFIGPULL_MASK BIT(2)
#define FPGAMGRREGS_CTRL_NCE_MASK BIT(1)
#define FPGAMGRREGS_CTRL_EN_MASK BIT(0)
#define FPGAMGRREGS_CTRL_CDRATIO_LSB 6
#define FPGAMGRREGS_MON_GPIO_EXT_PORTA_CRC_MASK BIT(3)
#define FPGAMGRREGS_MON_GPIO_EXT_PORTA_ID_MASK BIT(2)
#define FPGAMGRREGS_MON_GPIO_EXT_PORTA_CD_MASK BIT(1)
#define FPGAMGRREGS_MON_GPIO_EXT_PORTA_NS_MASK BIT(0)
/* FPGA Mode */
#define FPGAMGRREGS_MODE_FPGAOFF 0x0
#define FPGAMGRREGS_MODE_RESETPHASE 0x1
#define FPGAMGRREGS_MODE_CFGPHASE 0x2
#define FPGAMGRREGS_MODE_INITPHASE 0x3
#define FPGAMGRREGS_MODE_USERMODE 0x4
#define FPGAMGRREGS_MODE_UNKNOWN 0x5
#ifndef __ASSEMBLY__
struct socfpga_fpga_manager {
/* FPGA Manager Module */
u32 stat; /* 0x00 */
u32 ctrl;
u32 dclkcnt;
u32 dclkstat;
u32 gpo; /* 0x10 */
u32 gpi;
u32 misci; /* 0x18 */
u32 _pad_0x1c_0x82c[517];
/* Configuration Monitor (MON) Registers */
u32 gpio_inten; /* 0x830 */
u32 gpio_intmask;
u32 gpio_inttype_level;
u32 gpio_int_polarity;
u32 gpio_intstatus; /* 0x840 */
u32 gpio_raw_intstatus;
u32 _pad_0x848;
u32 gpio_porta_eoi;
u32 gpio_ext_porta; /* 0x850 */
u32 _pad_0x854_0x85c[3];
u32 gpio_1s_sync; /* 0x860 */
u32 _pad_0x864_0x868[2];
u32 gpio_ver_id_code;
u32 gpio_config_reg2; /* 0x870 */
u32 gpio_config_reg1;
};
#endif /* __ASSEMBLY__ */
#endif /* _FPGA_MANAGER_GEN5_H_ */

1
drivers/fpga/Makefile
View File

@ -20,4 +20,5 @@ obj-$(CONFIG_FPGA_CYCLON2) += cyclon2.o
obj-$(CONFIG_FPGA_STRATIX_II) += stratixII.o
obj-$(CONFIG_FPGA_STRATIX_V) += stratixv.o
obj-$(CONFIG_FPGA_SOCFPGA) += socfpga.o
obj-$(CONFIG_TARGET_SOCFPGA_GEN5) += socfpga_gen5.o
endif

235
drivers/fpga/socfpga.c
View File

@ -19,18 +19,8 @@ DECLARE_GLOBAL_DATA_PTR;
static struct socfpga_fpga_manager *fpgamgr_regs =
(struct socfpga_fpga_manager *)SOCFPGA_FPGAMGRREGS_ADDRESS;
static struct socfpga_system_manager *sysmgr_regs =
(struct socfpga_system_manager *)SOCFPGA_SYSMGR_ADDRESS;
/* Set CD ratio */
static void fpgamgr_set_cd_ratio(unsigned long ratio)
{
clrsetbits_le32(&fpgamgr_regs->ctrl,
0x3 << FPGAMGRREGS_CTRL_CDRATIO_LSB,
(ratio & 0x3) << FPGAMGRREGS_CTRL_CDRATIO_LSB);
}
static int fpgamgr_dclkcnt_set(unsigned long cnt)
int fpgamgr_dclkcnt_set(unsigned long cnt)
{
unsigned long i;
@ -53,98 +43,8 @@ static int fpgamgr_dclkcnt_set(unsigned long cnt)
return -ETIMEDOUT;
}
/* Start the FPGA programming by initialize the FPGA Manager */
static int fpgamgr_program_init(void)
{
unsigned long msel, i;
/* Get the MSEL value */
msel = readl(&fpgamgr_regs->stat);
msel &= FPGAMGRREGS_STAT_MSEL_MASK;
msel >>= FPGAMGRREGS_STAT_MSEL_LSB;
/*
* Set the cfg width
* If MSEL[3] = 1, cfg width = 32 bit
*/
if (msel & 0x8) {
setbits_le32(&fpgamgr_regs->ctrl,
FPGAMGRREGS_CTRL_CFGWDTH_MASK);
/* To determine the CD ratio */
/* MSEL[1:0] = 0, CD Ratio = 1 */
if ((msel & 0x3) == 0x0)
fpgamgr_set_cd_ratio(CDRATIO_x1);
/* MSEL[1:0] = 1, CD Ratio = 4 */
else if ((msel & 0x3) == 0x1)
fpgamgr_set_cd_ratio(CDRATIO_x4);
/* MSEL[1:0] = 2, CD Ratio = 8 */
else if ((msel & 0x3) == 0x2)
fpgamgr_set_cd_ratio(CDRATIO_x8);
} else { /* MSEL[3] = 0 */
clrbits_le32(&fpgamgr_regs->ctrl,
FPGAMGRREGS_CTRL_CFGWDTH_MASK);
/* To determine the CD ratio */
/* MSEL[1:0] = 0, CD Ratio = 1 */
if ((msel & 0x3) == 0x0)
fpgamgr_set_cd_ratio(CDRATIO_x1);
/* MSEL[1:0] = 1, CD Ratio = 2 */
else if ((msel & 0x3) == 0x1)
fpgamgr_set_cd_ratio(CDRATIO_x2);
/* MSEL[1:0] = 2, CD Ratio = 4 */
else if ((msel & 0x3) == 0x2)
fpgamgr_set_cd_ratio(CDRATIO_x4);
}
/* To enable FPGA Manager configuration */
clrbits_le32(&fpgamgr_regs->ctrl, FPGAMGRREGS_CTRL_NCE_MASK);
/* To enable FPGA Manager drive over configuration line */
setbits_le32(&fpgamgr_regs->ctrl, FPGAMGRREGS_CTRL_EN_MASK);
/* Put FPGA into reset phase */
setbits_le32(&fpgamgr_regs->ctrl, FPGAMGRREGS_CTRL_NCONFIGPULL_MASK);
/* (1) wait until FPGA enter reset phase */
for (i = 0; i < FPGA_TIMEOUT_CNT; i++) {
if (fpgamgr_get_mode() == FPGAMGRREGS_MODE_RESETPHASE)
break;
}
/* If not in reset state, return error */
if (fpgamgr_get_mode() != FPGAMGRREGS_MODE_RESETPHASE) {
puts("FPGA: Could not reset\n");
return -1;
}
/* Release FPGA from reset phase */
clrbits_le32(&fpgamgr_regs->ctrl, FPGAMGRREGS_CTRL_NCONFIGPULL_MASK);
/* (2) wait until FPGA enter configuration phase */
for (i = 0; i < FPGA_TIMEOUT_CNT; i++) {
if (fpgamgr_get_mode() == FPGAMGRREGS_MODE_CFGPHASE)
break;
}
/* If not in configuration state, return error */
if (fpgamgr_get_mode() != FPGAMGRREGS_MODE_CFGPHASE) {
puts("FPGA: Could not configure\n");
return -2;
}
/* Clear all interrupts in CB Monitor */
writel(0xFFF, &fpgamgr_regs->gpio_porta_eoi);
/* Enable AXI configuration */
setbits_le32(&fpgamgr_regs->ctrl, FPGAMGRREGS_CTRL_AXICFGEN_MASK);
return 0;
}
/* Write the RBF data to FPGA Manager */
static void fpgamgr_program_write(const void *rbf_data, unsigned long rbf_size)
void fpgamgr_program_write(const void *rbf_data, size_t rbf_size)
{
uint32_t src = (uint32_t)rbf_data;
uint32_t dst = SOCFPGA_FPGAMGRDATA_ADDRESS;
@ -171,134 +71,3 @@ static void fpgamgr_program_write(const void *rbf_data, unsigned long rbf_size)
: "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "cc");
}
/* Ensure the FPGA entering config done */
static int fpgamgr_program_poll_cd(void)
{
const uint32_t mask = FPGAMGRREGS_MON_GPIO_EXT_PORTA_NS_MASK |
FPGAMGRREGS_MON_GPIO_EXT_PORTA_CD_MASK;
unsigned long reg, i;
/* (3) wait until full config done */
for (i = 0; i < FPGA_TIMEOUT_CNT; i++) {
reg = readl(&fpgamgr_regs->gpio_ext_porta);
/* Config error */
if (!(reg & mask)) {
printf("FPGA: Configuration error.\n");
return -3;
}
/* Config done without error */
if (reg & mask)
break;
}
/* Timeout happened, return error */
if (i == FPGA_TIMEOUT_CNT) {
printf("FPGA: Timeout waiting for program.\n");
return -4;
}
/* Disable AXI configuration */
clrbits_le32(&fpgamgr_regs->ctrl, FPGAMGRREGS_CTRL_AXICFGEN_MASK);
return 0;
}
/* Ensure the FPGA entering init phase */
static int fpgamgr_program_poll_initphase(void)
{
unsigned long i;
/* Additional clocks for the CB to enter initialization phase */
if (fpgamgr_dclkcnt_set(0x4))
return -5;
/* (4) wait until FPGA enter init phase or user mode */
for (i = 0; i < FPGA_TIMEOUT_CNT; i++) {
if (fpgamgr_get_mode() == FPGAMGRREGS_MODE_INITPHASE)
break;
if (fpgamgr_get_mode() == FPGAMGRREGS_MODE_USERMODE)
break;
}
/* If not in configuration state, return error */
if (i == FPGA_TIMEOUT_CNT)
return -6;
return 0;
}
/* Ensure the FPGA entering user mode */
static int fpgamgr_program_poll_usermode(void)
{
unsigned long i;
/* Additional clocks for the CB to exit initialization phase */
if (fpgamgr_dclkcnt_set(0x5000))
return -7;
/* (5) wait until FPGA enter user mode */
for (i = 0; i < FPGA_TIMEOUT_CNT; i++) {
if (fpgamgr_get_mode() == FPGAMGRREGS_MODE_USERMODE)
break;
}
/* If not in configuration state, return error */
if (i == FPGA_TIMEOUT_CNT)
return -8;
/* To release FPGA Manager drive over configuration line */
clrbits_le32(&fpgamgr_regs->ctrl, FPGAMGRREGS_CTRL_EN_MASK);
return 0;
}
/*
* FPGA Manager to program the FPGA. This is the interface used by FPGA driver.
* Return 0 for sucess, non-zero for error.
*/
int socfpga_load(Altera_desc *desc, const void *rbf_data, size_t rbf_size)
{
unsigned long status;
if ((uint32_t)rbf_data & 0x3) {
puts("FPGA: Unaligned data, realign to 32bit boundary.\n");
return -EINVAL;
}
/* Prior programming the FPGA, all bridges need to be shut off */
/* Disable all signals from hps peripheral controller to fpga */
writel(0, &sysmgr_regs->fpgaintfgrp_module);
/* Disable all signals from FPGA to HPS SDRAM */
#define SDR_CTRLGRP_FPGAPORTRST_ADDRESS 0x5080
writel(0, SOCFPGA_SDR_ADDRESS + SDR_CTRLGRP_FPGAPORTRST_ADDRESS);
/* Disable all axi bridge (hps2fpga, lwhps2fpga & fpga2hps) */
socfpga_bridges_reset(1);
/* Unmap the bridges from NIC-301 */
writel(0x1, SOCFPGA_L3REGS_ADDRESS);
/* Initialize the FPGA Manager */
status = fpgamgr_program_init();
if (status)
return status;
/* Write the RBF data to FPGA Manager */
fpgamgr_program_write(rbf_data, rbf_size);
/* Ensure the FPGA entering config done */
status = fpgamgr_program_poll_cd();
if (status)
return status;
/* Ensure the FPGA entering init phase */
status = fpgamgr_program_poll_initphase();
if (status)
return status;
/* Ensure the FPGA entering user mode */
return fpgamgr_program_poll_usermode();
}

252
drivers/fpga/socfpga_gen5.c Normal file
View File

@ -0,0 +1,252 @@
/*
* Copyright (C) 2012 Altera Corporation <www.altera.com>
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <common.h>
#include <asm/io.h>
#include <linux/errno.h>
#include <asm/arch/fpga_manager.h>
#include <asm/arch/reset_manager.h>
#include <asm/arch/system_manager.h>
DECLARE_GLOBAL_DATA_PTR;
#define FPGA_TIMEOUT_CNT 0x1000000
static struct socfpga_fpga_manager *fpgamgr_regs =
(struct socfpga_fpga_manager *)SOCFPGA_FPGAMGRREGS_ADDRESS;
static struct socfpga_system_manager *sysmgr_regs =
(struct socfpga_system_manager *)SOCFPGA_SYSMGR_ADDRESS;
/* Set CD ratio */
static void fpgamgr_set_cd_ratio(unsigned long ratio)
{
clrsetbits_le32(&fpgamgr_regs->ctrl,
0x3 << FPGAMGRREGS_CTRL_CDRATIO_LSB,
(ratio & 0x3) << FPGAMGRREGS_CTRL_CDRATIO_LSB);
}
/* Start the FPGA programming by initialize the FPGA Manager */
static int fpgamgr_program_init(void)
{
unsigned long msel, i;
/* Get the MSEL value */
msel = readl(&fpgamgr_regs->stat);
msel &= FPGAMGRREGS_STAT_MSEL_MASK;
msel >>= FPGAMGRREGS_STAT_MSEL_LSB;
/*
* Set the cfg width
* If MSEL[3] = 1, cfg width = 32 bit
*/
if (msel & 0x8) {
setbits_le32(&fpgamgr_regs->ctrl,
FPGAMGRREGS_CTRL_CFGWDTH_MASK);
/* To determine the CD ratio */
/* MSEL[1:0] = 0, CD Ratio = 1 */
if ((msel & 0x3) == 0x0)
fpgamgr_set_cd_ratio(CDRATIO_x1);
/* MSEL[1:0] = 1, CD Ratio = 4 */
else if ((msel & 0x3) == 0x1)
fpgamgr_set_cd_ratio(CDRATIO_x4);
/* MSEL[1:0] = 2, CD Ratio = 8 */
else if ((msel & 0x3) == 0x2)
fpgamgr_set_cd_ratio(CDRATIO_x8);
} else { /* MSEL[3] = 0 */
clrbits_le32(&fpgamgr_regs->ctrl,
FPGAMGRREGS_CTRL_CFGWDTH_MASK);
/* To determine the CD ratio */
/* MSEL[1:0] = 0, CD Ratio = 1 */
if ((msel & 0x3) == 0x0)
fpgamgr_set_cd_ratio(CDRATIO_x1);
/* MSEL[1:0] = 1, CD Ratio = 2 */
else if ((msel & 0x3) == 0x1)
fpgamgr_set_cd_ratio(CDRATIO_x2);
/* MSEL[1:0] = 2, CD Ratio = 4 */
else if ((msel & 0x3) == 0x2)
fpgamgr_set_cd_ratio(CDRATIO_x4);
}
/* To enable FPGA Manager configuration */
clrbits_le32(&fpgamgr_regs->ctrl, FPGAMGRREGS_CTRL_NCE_MASK);
/* To enable FPGA Manager drive over configuration line */
setbits_le32(&fpgamgr_regs->ctrl, FPGAMGRREGS_CTRL_EN_MASK);
/* Put FPGA into reset phase */
setbits_le32(&fpgamgr_regs->ctrl, FPGAMGRREGS_CTRL_NCONFIGPULL_MASK);
/* (1) wait until FPGA enter reset phase */
for (i = 0; i < FPGA_TIMEOUT_CNT; i++) {
if (fpgamgr_get_mode() == FPGAMGRREGS_MODE_RESETPHASE)
break;
}
/* If not in reset state, return error */
if (fpgamgr_get_mode() != FPGAMGRREGS_MODE_RESETPHASE) {
puts("FPGA: Could not reset\n");
return -1;
}
/* Release FPGA from reset phase */
clrbits_le32(&fpgamgr_regs->ctrl, FPGAMGRREGS_CTRL_NCONFIGPULL_MASK);
/* (2) wait until FPGA enter configuration phase */
for (i = 0; i < FPGA_TIMEOUT_CNT; i++) {
if (fpgamgr_get_mode() == FPGAMGRREGS_MODE_CFGPHASE)
break;
}
/* If not in configuration state, return error */
if (fpgamgr_get_mode() != FPGAMGRREGS_MODE_CFGPHASE) {
puts("FPGA: Could not configure\n");
return -2;
}
/* Clear all interrupts in CB Monitor */
writel(0xFFF, &fpgamgr_regs->gpio_porta_eoi);
/* Enable AXI configuration */
setbits_le32(&fpgamgr_regs->ctrl, FPGAMGRREGS_CTRL_AXICFGEN_MASK);
return 0;
}
/* Ensure the FPGA entering config done */
static int fpgamgr_program_poll_cd(void)
{
const uint32_t mask = FPGAMGRREGS_MON_GPIO_EXT_PORTA_NS_MASK |
FPGAMGRREGS_MON_GPIO_EXT_PORTA_CD_MASK;
unsigned long reg, i;
/* (3) wait until full config done */
for (i = 0; i < FPGA_TIMEOUT_CNT; i++) {
reg = readl(&fpgamgr_regs->gpio_ext_porta);
/* Config error */
if (!(reg & mask)) {
printf("FPGA: Configuration error.\n");
return -3;
}
/* Config done without error */
if (reg & mask)
break;
}
/* Timeout happened, return error */
if (i == FPGA_TIMEOUT_CNT) {
printf("FPGA: Timeout waiting for program.\n");
return -4;
}
/* Disable AXI configuration */
clrbits_le32(&fpgamgr_regs->ctrl, FPGAMGRREGS_CTRL_AXICFGEN_MASK);
return 0;
}
/* Ensure the FPGA entering init phase */
static int fpgamgr_program_poll_initphase(void)
{
unsigned long i;
/* Additional clocks for the CB to enter initialization phase */
if (fpgamgr_dclkcnt_set(0x4))
return -5;
/* (4) wait until FPGA enter init phase or user mode */
for (i = 0; i < FPGA_TIMEOUT_CNT; i++) {
if (fpgamgr_get_mode() == FPGAMGRREGS_MODE_INITPHASE)
break;
if (fpgamgr_get_mode() == FPGAMGRREGS_MODE_USERMODE)
break;
}
/* If not in configuration state, return error */
if (i == FPGA_TIMEOUT_CNT)
return -6;
return 0;
}
/* Ensure the FPGA entering user mode */
static int fpgamgr_program_poll_usermode(void)
{
unsigned long i;
/* Additional clocks for the CB to exit initialization phase */
if (fpgamgr_dclkcnt_set(0x5000))
return -7;
/* (5) wait until FPGA enter user mode */
for (i = 0; i < FPGA_TIMEOUT_CNT; i++) {
if (fpgamgr_get_mode() == FPGAMGRREGS_MODE_USERMODE)
break;
}
/* If not in configuration state, return error */
if (i == FPGA_TIMEOUT_CNT)
return -8;
/* To release FPGA Manager drive over configuration line */
clrbits_le32(&fpgamgr_regs->ctrl, FPGAMGRREGS_CTRL_EN_MASK);
return 0;
}
/*
* FPGA Manager to program the FPGA. This is the interface used by FPGA driver.
* Return 0 for sucess, non-zero for error.
*/
int socfpga_load(Altera_desc *desc, const void *rbf_data, size_t rbf_size)
{
unsigned long status;
if ((uint32_t)rbf_data & 0x3) {
puts("FPGA: Unaligned data, realign to 32bit boundary.\n");
return -EINVAL;
}
/* Prior programming the FPGA, all bridges need to be shut off */
/* Disable all signals from hps peripheral controller to fpga */
writel(0, &sysmgr_regs->fpgaintfgrp_module);
/* Disable all signals from FPGA to HPS SDRAM */
#define SDR_CTRLGRP_FPGAPORTRST_ADDRESS 0x5080
writel(0, SOCFPGA_SDR_ADDRESS + SDR_CTRLGRP_FPGAPORTRST_ADDRESS);
/* Disable all axi bridge (hps2fpga, lwhps2fpga & fpga2hps) */
socfpga_bridges_reset(1);
/* Unmap the bridges from NIC-301 */
writel(0x1, SOCFPGA_L3REGS_ADDRESS);
/* Initialize the FPGA Manager */
status = fpgamgr_program_init();
if (status)
return status;
/* Write the RBF data to FPGA Manager */
fpgamgr_program_write(rbf_data, rbf_size);
/* Ensure the FPGA entering config done */
status = fpgamgr_program_poll_cd();
if (status)
return status;
/* Ensure the FPGA entering init phase */
status = fpgamgr_program_poll_initphase();
if (status)
return status;
/* Ensure the FPGA entering user mode */
return fpgamgr_program_poll_usermode();
}