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

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>

1 files changed, 2 insertions, 233 deletions

diff --git a/drivers/fpga/socfpga.c b/drivers/fpga/socfpga.c
index f1b2f2c4da..28fa16b944 100644
--- a/drivers/fpga/socfpga.c
+++ b/drivers/fpga/socfpga.c
@@ -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();
-}