arch/powerpc/cpu/mpc8xxx/srio.c - platform/external/u-boot - Gitiles

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2011 Freescale Semiconductor, Inc.
  */

 #include <common.h>
 #include <config.h>
 #include <log.h>
 #include <time.h>
 #include <asm/fsl_law.h>
 #include <asm/fsl_serdes.h>
 #include <asm/fsl_srio.h>
 #include <linux/delay.h>
 #include <linux/errno.h>

 #ifdef CONFIG_SRIO_PCIE_BOOT_MASTER
 #define SRIO_PORT_ACCEPT_ALL 0x10000001
 #define SRIO_IB_ATMU_AR 0x80f55000
 #define SRIO_OB_ATMU_AR_MAINT 0x80077000
 #define SRIO_OB_ATMU_AR_RW 0x80045000
 #define SRIO_LCSBA1CSR_OFFSET 0x5c
 #define SRIO_MAINT_WIN_SIZE 0x1000000 /* 16M */
 #define SRIO_RW_WIN_SIZE 0x100000 /* 1M */
 #define SRIO_LCSBA1CSR 0x60000000
 #endif

 #if defined(CONFIG_FSL_CORENET)
 #ifdef CONFIG_SYS_FSL_QORIQ_CHASSIS2
 	#define _DEVDISR_SRIO1 FSL_CORENET_DEVDISR3_SRIO1
 	#define _DEVDISR_SRIO2 FSL_CORENET_DEVDISR3_SRIO2
 #else
 	#define _DEVDISR_SRIO1 FSL_CORENET_DEVDISR_SRIO1
 	#define _DEVDISR_SRIO2 FSL_CORENET_DEVDISR_SRIO2
 #endif
 	#define _DEVDISR_RMU   FSL_CORENET_DEVDISR_RMU
 	#define CONFIG_SYS_MPC8xxx_GUTS_ADDR CFG_SYS_MPC85xx_GUTS_ADDR
 #elif defined(CONFIG_MPC85xx)
 	#define _DEVDISR_SRIO1 MPC85xx_DEVDISR_SRIO
 	#define _DEVDISR_SRIO2 MPC85xx_DEVDISR_SRIO
 	#define _DEVDISR_RMU   MPC85xx_DEVDISR_RMSG
 	#define CONFIG_SYS_MPC8xxx_GUTS_ADDR CFG_SYS_MPC85xx_GUTS_ADDR
 #elif defined(CONFIG_MPC86xx)
 	#define _DEVDISR_SRIO1 MPC86xx_DEVDISR_SRIO
 	#define _DEVDISR_SRIO2 MPC86xx_DEVDISR_SRIO
 	#define _DEVDISR_RMU   MPC86xx_DEVDISR_RMSG
 	#define CONFIG_SYS_MPC8xxx_GUTS_ADDR \
 		(&((immap_t *)CONFIG_SYS_IMMR)->im_gur)
 #else
 #error "No defines for DEVDISR_SRIO"
 #endif

 #ifdef CONFIG_SYS_FSL_ERRATUM_SRIO_A004034
 /*
  * Erratum A-004034
  * Affects: SRIO
  * Description: During port initialization, the SRIO port performs
  * lane synchronization (detecting valid symbols on a lane) and
  * lane alignment (coordinating multiple lanes to receive valid data
  * across lanes). Internal errors in lane synchronization and lane
  * alignment may cause failure to achieve link initialization at
  * the configured port width.
  * An SRIO port configured as a 4x port may see one of these scenarios:
  * 1. One or more lanes fails to achieve lane synchronization. Depending
  * on which lanes fail, this may result in downtraining from 4x to 1x
  * on lane 0, 4x to 1x on lane R (redundant lane).
  * 2. The link may fail to achieve lane alignment as a 4x, even though
  * all 4 lanes achieve lane synchronization, and downtrain to a 1x.
  * An SRIO port configured as a 1x port may fail to complete port
  * initialization (PnESCSR[PU] never deasserts) because of scenario 1.
  * Impact: SRIO port may downtrain to 1x, or may fail to complete
  * link initialization. Once a port completes link initialization
  * successfully, it will operate normally.
  */
 static int srio_erratum_a004034(u8 port)
 {
 	serdes_corenet_t *srds_regs;
 	u32 conf_lane;
 	u32 init_lane;
 	int idx, first, last;
 	u32 i;
 	unsigned long long end_tick;
 	struct ccsr_rio *srio_regs = (void *)CFG_SYS_FSL_SRIO_ADDR;

 	srds_regs = (void *)(CFG_SYS_FSL_CORENET_SERDES_ADDR);
 	conf_lane = (in_be32((void *)&srds_regs->srdspccr0)
 			>> (12 - port * 4)) & 0x3;
 	init_lane = (in_be32((void *)&srio_regs->lp_serial
 			.port[port].pccsr) >> 27) & 0x7;

 	/*
 	 * Start a counter set to ~2 ms after the SERDES reset is
 	 * complete (SERDES SRDSBnRSTCTL[RST_DONE]=1 for n
 	 * corresponding to the SERDES bank/PLL for the SRIO port).
 	 */
 	 if (in_be32((void *)&srds_regs->bank[0].rstctl)
 		& SRDS_RSTCTL_RSTDONE) {
 		/*
 		 * Poll the port uninitialized status (SRIO PnESCSR[PO]) until
 		 * PO=1 or the counter expires. If the counter expires, the
 		 * port has failed initialization: go to recover steps. If PO=1
 		 * and the desired port width is 1x, go to normal steps. If
 		 * PO = 1 and the desired port width is 4x, go to recover steps.
 		 */
 		end_tick = usec2ticks(2000) + get_ticks();
 		do {
 			if (in_be32((void *)&srio_regs->lp_serial
 				.port[port].pescsr) & 0x2) {
 				if (conf_lane == 0x1)
 					goto host_ok;
 				else {
 					if (init_lane == 0x2)
 						goto host_ok;
 					else
 						break;
 				}
 			}
 		} while (end_tick > get_ticks());

 		/* recover at most 3 times */
 		for (i = 0; i < 3; i++) {
 			/* Set SRIO PnCCSR[PD]=1 */
 			setbits_be32((void *)&srio_regs->lp_serial
 					.port[port].pccsr,
 					0x800000);
 			/*
 			* Set SRIO PnPCR[OBDEN] on the host to
 			* enable the discarding of any pending packets.
 			*/
 			setbits_be32((void *)&srio_regs->impl.port[port].pcr,
 				0x04);
 			/* Wait 50 us */
 			udelay(50);
 			/* Run sync command */
 			isync();

 			if (port)
 				first = serdes_get_first_lane(SRIO2);
 			else
 				first = serdes_get_first_lane(SRIO1);
 			if (unlikely(first < 0))
 				return -ENODEV;
 			if (conf_lane == 0x1)
 				last = first;
 			else
 				last = first + 3;
 			/*
 			 * Set SERDES BnGCRm0[RRST]=0 for each SRIO
 			 * bank n and lane m.
 			 */
 			for (idx = first; idx <= last; idx++)
 				clrbits_be32(&srds_regs->lane[idx].gcr0,
 				SRDS_GCR0_RRST);
 			/*
 			 * Read SERDES BnGCRm0 for each SRIO
 			 * bank n and lane m
 			 */
 			for (idx = first; idx <= last; idx++)
 				in_be32(&srds_regs->lane[idx].gcr0);
 			/* Run sync command */
 			isync();
 			/* Wait >= 100 ns */
 			udelay(1);
 			/*
 			 * Set SERDES BnGCRm0[RRST]=1 for each SRIO
 			 * bank n and lane m.
 			 */
 			for (idx = first; idx <= last; idx++)
 				setbits_be32(&srds_regs->lane[idx].gcr0,
 				SRDS_GCR0_RRST);
 			/*
 			 * Read SERDES BnGCRm0 for each SRIO
 			 * bank n and lane m
 			 */
 			for (idx = first; idx <= last; idx++)
 				in_be32(&srds_regs->lane[idx].gcr0);
 			/* Run sync command */
 			isync();
 			/* Wait >= 300 ns */
 			udelay(1);

 			/* Write 1 to clear all bits in SRIO PnSLCSR */
 			out_be32((void *)&srio_regs->impl.port[port].slcsr,
 				0xffffffff);
 			/* Clear SRIO PnPCR[OBDEN] on the host */
 			clrbits_be32((void *)&srio_regs->impl.port[port].pcr,
 				0x04);
 			/* Set SRIO PnCCSR[PD]=0 */
 			clrbits_be32((void *)&srio_regs->lp_serial
 				.port[port].pccsr,
 				0x800000);
 			/* Wait >= 24 ms */
 			udelay(24000);
 			/* Poll the state of the port again */
 			init_lane =
 				(in_be32((void *)&srio_regs->lp_serial
 					.port[port].pccsr) >> 27) & 0x7;
 			if (in_be32((void *)&srio_regs->lp_serial
 				.port[port].pescsr) & 0x2) {
 				if (conf_lane == 0x1)
 					goto host_ok;
 				else {
 					if (init_lane == 0x2)
 						goto host_ok;
 				}
 			}
 			if (i == 2)
 				return -ENODEV;
 		}
 	} else
 		return -ENODEV;

 host_ok:
 	/* Poll PnESCSR[OES] on the host until it is clear */
 	end_tick = usec2ticks(1000000) + get_ticks();
 	do {
 		if (!(in_be32((void *)&srio_regs->lp_serial.port[port].pescsr)
 			& 0x10000)) {
 			out_be32(((void *)&srio_regs->lp_serial
 				.port[port].pescsr), 0xffffffff);
 			out_be32(((void *)&srio_regs->phys_err
 				.port[port].edcsr), 0);
 			out_be32(((void *)&srio_regs->logical_err.ltledcsr), 0);
 			return 0;
 		}
 	} while (end_tick > get_ticks());

 	return -ENODEV;
 }
 #endif

 void srio_init(void)
 {
 	ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC8xxx_GUTS_ADDR;
 	int srio1_used = 0, srio2_used = 0;
 	u32 *devdisr;

 #ifdef CONFIG_SYS_FSL_QORIQ_CHASSIS2
 	devdisr = &gur->devdisr3;
 #else
 	devdisr = &gur->devdisr;
 #endif
 	if (is_serdes_configured(SRIO1)) {
 		set_next_law(CONFIG_SYS_SRIO1_MEM_PHYS,
 				law_size_bits(CONFIG_SYS_SRIO1_MEM_SIZE),
 				LAW_TRGT_IF_RIO_1);
 		srio1_used = 1;
 #ifdef CONFIG_SYS_FSL_ERRATUM_SRIO_A004034
 		if (srio_erratum_a004034(0) < 0)
 			printf("SRIO1: enabled but port error\n");
 		else
 #endif
 		printf("SRIO1: enabled\n");
 	} else {
 		printf("SRIO1: disabled\n");
 	}

 #ifdef CONFIG_SRIO2
 	if (is_serdes_configured(SRIO2)) {
 		set_next_law(CONFIG_SYS_SRIO2_MEM_PHYS,
 				law_size_bits(CONFIG_SYS_SRIO2_MEM_SIZE),
 				LAW_TRGT_IF_RIO_2);
 		srio2_used = 1;
 #ifdef CONFIG_SYS_FSL_ERRATUM_SRIO_A004034
 		if (srio_erratum_a004034(1) < 0)
 			printf("SRIO2: enabled but port error\n");
 		else
 #endif
 		printf("SRIO2: enabled\n");

 	} else {
 		printf("SRIO2: disabled\n");
 	}
 #endif

 #ifdef CONFIG_FSL_CORENET
 	/* On FSL_CORENET devices we can disable individual ports */
 	if (!srio1_used)
 		setbits_be32(devdisr, _DEVDISR_SRIO1);
 	if (!srio2_used)
 		setbits_be32(devdisr, _DEVDISR_SRIO2);
 #endif

 	/* neither port is used - disable everything */
 	if (!srio1_used && !srio2_used) {
 		setbits_be32(devdisr, _DEVDISR_SRIO1);
 		setbits_be32(devdisr, _DEVDISR_SRIO2);
 		setbits_be32(devdisr, _DEVDISR_RMU);
 	}
 }

 #ifdef CONFIG_SRIO_PCIE_BOOT_MASTER
 void srio_boot_master(int port)
 {
 	struct ccsr_rio *srio = (void *)CFG_SYS_FSL_SRIO_ADDR;

 	/* set port accept-all */
 	out_be32((void *)&srio->impl.port[port - 1].ptaacr,
 				SRIO_PORT_ACCEPT_ALL);

 	debug("SRIOBOOT - MASTER: Master port [ %d ] for srio boot.\n", port);
 	/* configure inbound window for slave's u-boot image */
 	debug("SRIOBOOT - MASTER: Inbound window for slave's image; "
 			"Local = 0x%llx, Srio = 0x%llx, Size = 0x%x\n",
 			(u64)CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_PHYS,
 			(u64)CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_BUS1,
 			CONFIG_SRIO_PCIE_BOOT_IMAGE_SIZE);
 	out_be32((void *)&srio->atmu.port[port - 1].inbw[0].riwtar,
 			CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_PHYS >> 12);
 	out_be32((void *)&srio->atmu.port[port - 1].inbw[0].riwbar,
 			CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_BUS1 >> 12);
 	out_be32((void *)&srio->atmu.port[port - 1].inbw[0].riwar,
 			SRIO_IB_ATMU_AR
 			| atmu_size_mask(CONFIG_SRIO_PCIE_BOOT_IMAGE_SIZE));

 	/* configure inbound window for slave's u-boot image */
 	debug("SRIOBOOT - MASTER: Inbound window for slave's image; "
 			"Local = 0x%llx, Srio = 0x%llx, Size = 0x%x\n",
 			(u64)CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_PHYS,
 			(u64)CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_BUS2,
 			CONFIG_SRIO_PCIE_BOOT_IMAGE_SIZE);
 	out_be32((void *)&srio->atmu.port[port - 1].inbw[1].riwtar,
 			CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_PHYS >> 12);
 	out_be32((void *)&srio->atmu.port[port - 1].inbw[1].riwbar,
 			CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_BUS2 >> 12);
 	out_be32((void *)&srio->atmu.port[port - 1].inbw[1].riwar,
 			SRIO_IB_ATMU_AR
 			| atmu_size_mask(CONFIG_SRIO_PCIE_BOOT_IMAGE_SIZE));

 	/* configure inbound window for slave's ucode and ENV */
 	debug("SRIOBOOT - MASTER: Inbound window for slave's ucode and ENV; "
 			"Local = 0x%llx, Srio = 0x%llx, Size = 0x%x\n",
 			(u64)CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_MEM_PHYS,
 			(u64)CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_MEM_BUS,
 			CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_SIZE);
 	out_be32((void *)&srio->atmu.port[port - 1].inbw[2].riwtar,
 			CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_MEM_PHYS >> 12);
 	out_be32((void *)&srio->atmu.port[port - 1].inbw[2].riwbar,
 			CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_MEM_BUS >> 12);
 	out_be32((void *)&srio->atmu.port[port - 1].inbw[2].riwar,
 			SRIO_IB_ATMU_AR
 			| atmu_size_mask(CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_SIZE));
 }

 void srio_boot_master_release_slave(int port)
 {
 	struct ccsr_rio *srio = (void *)CFG_SYS_FSL_SRIO_ADDR;
 	u32 escsr;
 	debug("SRIOBOOT - MASTER: "
 			"Check the port status and release slave core ...\n");

 	escsr = in_be32((void *)&srio->lp_serial.port[port - 1].pescsr);
 	if (escsr & 0x2) {
 		if (escsr & 0x10100) {
 			debug("SRIOBOOT - MASTER: Port [ %d ] is error.\n",
 				port);
 		} else {
 			debug("SRIOBOOT - MASTER: "
 				"Port [ %d ] is ready, now release slave's core ...\n",
 				port);
 			/*
 			 * configure outbound window
 			 * with maintenance attribute to set slave's LCSBA1CSR
 			 */
 			out_be32((void *)&srio->atmu.port[port - 1]
 				.outbw[1].rowtar, 0);
 			out_be32((void *)&srio->atmu.port[port - 1]
 				.outbw[1].rowtear, 0);
 			if (port - 1)
 				out_be32((void *)&srio->atmu.port[port - 1]
 					.outbw[1].rowbar,
 					CONFIG_SYS_SRIO2_MEM_PHYS >> 12);
 			else
 				out_be32((void *)&srio->atmu.port[port - 1]
 					.outbw[1].rowbar,
 					CONFIG_SYS_SRIO1_MEM_PHYS >> 12);
 			out_be32((void *)&srio->atmu.port[port - 1]
 					.outbw[1].rowar,
 					SRIO_OB_ATMU_AR_MAINT
 					| atmu_size_mask(SRIO_MAINT_WIN_SIZE));

 			/*
 			 * configure outbound window
 			 * with R/W attribute to set slave's BRR
 			 */
 			out_be32((void *)&srio->atmu.port[port - 1]
 				.outbw[2].rowtar,
 				SRIO_LCSBA1CSR >> 9);
 			out_be32((void *)&srio->atmu.port[port - 1]
 				.outbw[2].rowtear, 0);
 			if (port - 1)
 				out_be32((void *)&srio->atmu.port[port - 1]
 					.outbw[2].rowbar,
 					(CONFIG_SYS_SRIO2_MEM_PHYS
 					+ SRIO_MAINT_WIN_SIZE) >> 12);
 			else
 				out_be32((void *)&srio->atmu.port[port - 1]
 					.outbw[2].rowbar,
 					(CONFIG_SYS_SRIO1_MEM_PHYS
 					+ SRIO_MAINT_WIN_SIZE) >> 12);
 			out_be32((void *)&srio->atmu.port[port - 1]
 				.outbw[2].rowar,
 				SRIO_OB_ATMU_AR_RW
 				| atmu_size_mask(SRIO_RW_WIN_SIZE));

 			/*
 			 * Set the LCSBA1CSR register in slave
 			 * by the maint-outbound window
 			 */
 			if (port - 1) {
 				out_be32((void *)CONFIG_SYS_SRIO2_MEM_VIRT
 					+ SRIO_LCSBA1CSR_OFFSET,
 					SRIO_LCSBA1CSR);
 				while (in_be32((void *)CONFIG_SYS_SRIO2_MEM_VIRT
 					+ SRIO_LCSBA1CSR_OFFSET)
 					!= SRIO_LCSBA1CSR)
 					;
 				/*
 				 * And then set the BRR register
 				 * to release slave core
 				 */
 				out_be32((void *)CONFIG_SYS_SRIO2_MEM_VIRT
 					+ SRIO_MAINT_WIN_SIZE
 					+ CONFIG_SRIO_PCIE_BOOT_BRR_OFFSET,
 					CONFIG_SRIO_PCIE_BOOT_RELEASE_MASK);
 			} else {
 				out_be32((void *)CONFIG_SYS_SRIO1_MEM_VIRT
 					+ SRIO_LCSBA1CSR_OFFSET,
 					SRIO_LCSBA1CSR);
 				while (in_be32((void *)CONFIG_SYS_SRIO1_MEM_VIRT
 					+ SRIO_LCSBA1CSR_OFFSET)
 					!= SRIO_LCSBA1CSR)
 					;
 				/*
 				 * And then set the BRR register
 				 * to release slave core
 				 */
 				out_be32((void *)CONFIG_SYS_SRIO1_MEM_VIRT
 					+ SRIO_MAINT_WIN_SIZE
 					+ CONFIG_SRIO_PCIE_BOOT_BRR_OFFSET,
 					CONFIG_SRIO_PCIE_BOOT_RELEASE_MASK);
 			}
 			debug("SRIOBOOT - MASTER: "
 					"Release slave successfully! Now the slave should start up!\n");
 		}
 	} else
 		debug("SRIOBOOT - MASTER: Port [ %d ] is not ready.\n", port);
 }
 #endif
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Copyright 2011 Freescale Semiconductor, Inc.
	*/

	#include <common.h>
	#include <config.h>
	#include <log.h>
	#include <time.h>
	#include <asm/fsl_law.h>
	#include <asm/fsl_serdes.h>
	#include <asm/fsl_srio.h>
	#include <linux/delay.h>
	#include <linux/errno.h>

	#ifdef CONFIG_SRIO_PCIE_BOOT_MASTER
	#define SRIO_PORT_ACCEPT_ALL 0x10000001
	#define SRIO_IB_ATMU_AR 0x80f55000
	#define SRIO_OB_ATMU_AR_MAINT 0x80077000
	#define SRIO_OB_ATMU_AR_RW 0x80045000
	#define SRIO_LCSBA1CSR_OFFSET 0x5c
	#define SRIO_MAINT_WIN_SIZE 0x1000000 /* 16M */
	#define SRIO_RW_WIN_SIZE 0x100000 /* 1M */
	#define SRIO_LCSBA1CSR 0x60000000
	#endif

	#if defined(CONFIG_FSL_CORENET)
	#ifdef CONFIG_SYS_FSL_QORIQ_CHASSIS2
	#define _DEVDISR_SRIO1 FSL_CORENET_DEVDISR3_SRIO1
	#define _DEVDISR_SRIO2 FSL_CORENET_DEVDISR3_SRIO2
	#else
	#define _DEVDISR_SRIO1 FSL_CORENET_DEVDISR_SRIO1
	#define _DEVDISR_SRIO2 FSL_CORENET_DEVDISR_SRIO2
	#endif
	#define _DEVDISR_RMU FSL_CORENET_DEVDISR_RMU
	#define CONFIG_SYS_MPC8xxx_GUTS_ADDR CFG_SYS_MPC85xx_GUTS_ADDR
	#elif defined(CONFIG_MPC85xx)
	#define _DEVDISR_SRIO1 MPC85xx_DEVDISR_SRIO
	#define _DEVDISR_SRIO2 MPC85xx_DEVDISR_SRIO
	#define _DEVDISR_RMU MPC85xx_DEVDISR_RMSG
	#define CONFIG_SYS_MPC8xxx_GUTS_ADDR CFG_SYS_MPC85xx_GUTS_ADDR
	#elif defined(CONFIG_MPC86xx)
	#define _DEVDISR_SRIO1 MPC86xx_DEVDISR_SRIO
	#define _DEVDISR_SRIO2 MPC86xx_DEVDISR_SRIO
	#define _DEVDISR_RMU MPC86xx_DEVDISR_RMSG
	#define CONFIG_SYS_MPC8xxx_GUTS_ADDR \
	(&((immap_t *)CONFIG_SYS_IMMR)->im_gur)
	#else
	#error "No defines for DEVDISR_SRIO"
	#endif

	#ifdef CONFIG_SYS_FSL_ERRATUM_SRIO_A004034
	/*
	* Erratum A-004034
	* Affects: SRIO
	* Description: During port initialization, the SRIO port performs
	* lane synchronization (detecting valid symbols on a lane) and
	* lane alignment (coordinating multiple lanes to receive valid data
	* across lanes). Internal errors in lane synchronization and lane
	* alignment may cause failure to achieve link initialization at
	* the configured port width.
	* An SRIO port configured as a 4x port may see one of these scenarios:
	* 1. One or more lanes fails to achieve lane synchronization. Depending
	* on which lanes fail, this may result in downtraining from 4x to 1x
	* on lane 0, 4x to 1x on lane R (redundant lane).
	* 2. The link may fail to achieve lane alignment as a 4x, even though
	* all 4 lanes achieve lane synchronization, and downtrain to a 1x.
	* An SRIO port configured as a 1x port may fail to complete port
	* initialization (PnESCSR[PU] never deasserts) because of scenario 1.
	* Impact: SRIO port may downtrain to 1x, or may fail to complete
	* link initialization. Once a port completes link initialization
	* successfully, it will operate normally.
	*/
	static int srio_erratum_a004034(u8 port)
	{
	serdes_corenet_t *srds_regs;
	u32 conf_lane;
	u32 init_lane;
	int idx, first, last;
	u32 i;
	unsigned long long end_tick;
	struct ccsr_rio srio_regs = (void )CFG_SYS_FSL_SRIO_ADDR;

	srds_regs = (void *)(CFG_SYS_FSL_CORENET_SERDES_ADDR);
	conf_lane = (in_be32((void *)&srds_regs->srdspccr0)
	>> (12 - port * 4)) & 0x3;
	init_lane = (in_be32((void *)&srio_regs->lp_serial
	.port[port].pccsr) >> 27) & 0x7;

	/*
	* Start a counter set to ~2 ms after the SERDES reset is
	* complete (SERDES SRDSBnRSTCTL[RST_DONE]=1 for n
	* corresponding to the SERDES bank/PLL for the SRIO port).
	*/
	if (in_be32((void *)&srds_regs->bank[0].rstctl)
	& SRDS_RSTCTL_RSTDONE) {
	/*
	* Poll the port uninitialized status (SRIO PnESCSR[PO]) until
	* PO=1 or the counter expires. If the counter expires, the
	* port has failed initialization: go to recover steps. If PO=1
	* and the desired port width is 1x, go to normal steps. If
	* PO = 1 and the desired port width is 4x, go to recover steps.
	*/
	end_tick = usec2ticks(2000) + get_ticks();
	do {
	if (in_be32((void *)&srio_regs->lp_serial
	.port[port].pescsr) & 0x2) {
	if (conf_lane == 0x1)
	goto host_ok;
	else {
	if (init_lane == 0x2)
	goto host_ok;
	else
	break;
	}
	}
	} while (end_tick > get_ticks());

	/* recover at most 3 times */
	for (i = 0; i < 3; i++) {
	/* Set SRIO PnCCSR[PD]=1 */
	setbits_be32((void *)&srio_regs->lp_serial
	.port[port].pccsr,
	0x800000);
	/*
	* Set SRIO PnPCR[OBDEN] on the host to
	* enable the discarding of any pending packets.
	*/
	setbits_be32((void *)&srio_regs->impl.port[port].pcr,
	0x04);
	/* Wait 50 us */
	udelay(50);
	/* Run sync command */
	isync();

	if (port)
	first = serdes_get_first_lane(SRIO2);
	else
	first = serdes_get_first_lane(SRIO1);
	if (unlikely(first < 0))
	return -ENODEV;
	if (conf_lane == 0x1)
	last = first;
	else
	last = first + 3;
	/*
	* Set SERDES BnGCRm0[RRST]=0 for each SRIO
	* bank n and lane m.
	*/
	for (idx = first; idx <= last; idx++)
	clrbits_be32(&srds_regs->lane[idx].gcr0,
	SRDS_GCR0_RRST);
	/*
	* Read SERDES BnGCRm0 for each SRIO
	* bank n and lane m
	*/
	for (idx = first; idx <= last; idx++)
	in_be32(&srds_regs->lane[idx].gcr0);
	/* Run sync command */
	isync();
	/* Wait >= 100 ns */
	udelay(1);
	/*
	* Set SERDES BnGCRm0[RRST]=1 for each SRIO
	* bank n and lane m.
	*/
	for (idx = first; idx <= last; idx++)
	setbits_be32(&srds_regs->lane[idx].gcr0,
	SRDS_GCR0_RRST);
	/*
	* Read SERDES BnGCRm0 for each SRIO
	* bank n and lane m
	*/
	for (idx = first; idx <= last; idx++)
	in_be32(&srds_regs->lane[idx].gcr0);
	/* Run sync command */
	isync();
	/* Wait >= 300 ns */
	udelay(1);

	/* Write 1 to clear all bits in SRIO PnSLCSR */
	out_be32((void *)&srio_regs->impl.port[port].slcsr,
	0xffffffff);
	/* Clear SRIO PnPCR[OBDEN] on the host */
	clrbits_be32((void *)&srio_regs->impl.port[port].pcr,
	0x04);
	/* Set SRIO PnCCSR[PD]=0 */
	clrbits_be32((void *)&srio_regs->lp_serial
	.port[port].pccsr,
	0x800000);
	/* Wait >= 24 ms */
	udelay(24000);
	/* Poll the state of the port again */
	init_lane =
	(in_be32((void *)&srio_regs->lp_serial
	.port[port].pccsr) >> 27) & 0x7;
	if (in_be32((void *)&srio_regs->lp_serial
	.port[port].pescsr) & 0x2) {
	if (conf_lane == 0x1)
	goto host_ok;
	else {
	if (init_lane == 0x2)
	goto host_ok;
	}
	}
	if (i == 2)
	return -ENODEV;
	}
	} else
	return -ENODEV;

	host_ok:
	/* Poll PnESCSR[OES] on the host until it is clear */
	end_tick = usec2ticks(1000000) + get_ticks();
	do {
	if (!(in_be32((void *)&srio_regs->lp_serial.port[port].pescsr)
	& 0x10000)) {
	out_be32(((void *)&srio_regs->lp_serial
	.port[port].pescsr), 0xffffffff);
	out_be32(((void *)&srio_regs->phys_err
	.port[port].edcsr), 0);
	out_be32(((void *)&srio_regs->logical_err.ltledcsr), 0);
	return 0;
	}
	} while (end_tick > get_ticks());

	return -ENODEV;
	}
	#endif

	void srio_init(void)
	{
	ccsr_gur_t gur = (void )CONFIG_SYS_MPC8xxx_GUTS_ADDR;
	int srio1_used = 0, srio2_used = 0;
	u32 *devdisr;

	#ifdef CONFIG_SYS_FSL_QORIQ_CHASSIS2
	devdisr = &gur->devdisr3;
	#else
	devdisr = &gur->devdisr;
	#endif
	if (is_serdes_configured(SRIO1)) {
	set_next_law(CONFIG_SYS_SRIO1_MEM_PHYS,
	law_size_bits(CONFIG_SYS_SRIO1_MEM_SIZE),
	LAW_TRGT_IF_RIO_1);
	srio1_used = 1;
	#ifdef CONFIG_SYS_FSL_ERRATUM_SRIO_A004034
	if (srio_erratum_a004034(0) < 0)
	printf("SRIO1: enabled but port error\n");
	else
	#endif
	printf("SRIO1: enabled\n");
	} else {
	printf("SRIO1: disabled\n");
	}

	#ifdef CONFIG_SRIO2
	if (is_serdes_configured(SRIO2)) {
	set_next_law(CONFIG_SYS_SRIO2_MEM_PHYS,
	law_size_bits(CONFIG_SYS_SRIO2_MEM_SIZE),
	LAW_TRGT_IF_RIO_2);
	srio2_used = 1;
	#ifdef CONFIG_SYS_FSL_ERRATUM_SRIO_A004034
	if (srio_erratum_a004034(1) < 0)
	printf("SRIO2: enabled but port error\n");
	else
	#endif
	printf("SRIO2: enabled\n");

	} else {
	printf("SRIO2: disabled\n");
	}
	#endif

	#ifdef CONFIG_FSL_CORENET
	/* On FSL_CORENET devices we can disable individual ports */
	if (!srio1_used)
	setbits_be32(devdisr, _DEVDISR_SRIO1);
	if (!srio2_used)
	setbits_be32(devdisr, _DEVDISR_SRIO2);
	#endif

	/* neither port is used - disable everything */
	if (!srio1_used && !srio2_used) {
	setbits_be32(devdisr, _DEVDISR_SRIO1);
	setbits_be32(devdisr, _DEVDISR_SRIO2);
	setbits_be32(devdisr, _DEVDISR_RMU);
	}
	}

	#ifdef CONFIG_SRIO_PCIE_BOOT_MASTER
	void srio_boot_master(int port)
	{
	struct ccsr_rio srio = (void )CFG_SYS_FSL_SRIO_ADDR;

	/* set port accept-all */
	out_be32((void *)&srio->impl.port[port - 1].ptaacr,
	SRIO_PORT_ACCEPT_ALL);

	debug("SRIOBOOT - MASTER: Master port [ %d ] for srio boot.\n", port);
	/* configure inbound window for slave's u-boot image */
	debug("SRIOBOOT - MASTER: Inbound window for slave's image; "
	"Local = 0x%llx, Srio = 0x%llx, Size = 0x%x\n",
	(u64)CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_PHYS,
	(u64)CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_BUS1,
	CONFIG_SRIO_PCIE_BOOT_IMAGE_SIZE);
	out_be32((void *)&srio->atmu.port[port - 1].inbw[0].riwtar,
	CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_PHYS >> 12);
	out_be32((void *)&srio->atmu.port[port - 1].inbw[0].riwbar,
	CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_BUS1 >> 12);
	out_be32((void *)&srio->atmu.port[port - 1].inbw[0].riwar,
	SRIO_IB_ATMU_AR
	\| atmu_size_mask(CONFIG_SRIO_PCIE_BOOT_IMAGE_SIZE));

	/* configure inbound window for slave's u-boot image */
	debug("SRIOBOOT - MASTER: Inbound window for slave's image; "
	"Local = 0x%llx, Srio = 0x%llx, Size = 0x%x\n",
	(u64)CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_PHYS,
	(u64)CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_BUS2,
	CONFIG_SRIO_PCIE_BOOT_IMAGE_SIZE);
	out_be32((void *)&srio->atmu.port[port - 1].inbw[1].riwtar,
	CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_PHYS >> 12);
	out_be32((void *)&srio->atmu.port[port - 1].inbw[1].riwbar,
	CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_BUS2 >> 12);
	out_be32((void *)&srio->atmu.port[port - 1].inbw[1].riwar,
	SRIO_IB_ATMU_AR
	\| atmu_size_mask(CONFIG_SRIO_PCIE_BOOT_IMAGE_SIZE));

	/* configure inbound window for slave's ucode and ENV */
	debug("SRIOBOOT - MASTER: Inbound window for slave's ucode and ENV; "
	"Local = 0x%llx, Srio = 0x%llx, Size = 0x%x\n",
	(u64)CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_MEM_PHYS,
	(u64)CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_MEM_BUS,
	CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_SIZE);
	out_be32((void *)&srio->atmu.port[port - 1].inbw[2].riwtar,
	CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_MEM_PHYS >> 12);
	out_be32((void *)&srio->atmu.port[port - 1].inbw[2].riwbar,
	CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_MEM_BUS >> 12);
	out_be32((void *)&srio->atmu.port[port - 1].inbw[2].riwar,
	SRIO_IB_ATMU_AR
	\| atmu_size_mask(CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_SIZE));
	}

	void srio_boot_master_release_slave(int port)
	{
	struct ccsr_rio srio = (void )CFG_SYS_FSL_SRIO_ADDR;
	u32 escsr;
	debug("SRIOBOOT - MASTER: "
	"Check the port status and release slave core ...\n");

	escsr = in_be32((void *)&srio->lp_serial.port[port - 1].pescsr);
	if (escsr & 0x2) {
	if (escsr & 0x10100) {
	debug("SRIOBOOT - MASTER: Port [ %d ] is error.\n",
	port);
	} else {
	debug("SRIOBOOT - MASTER: "
	"Port [ %d ] is ready, now release slave's core ...\n",
	port);
	/*
	* configure outbound window
	* with maintenance attribute to set slave's LCSBA1CSR
	*/
	out_be32((void *)&srio->atmu.port[port - 1]
	.outbw[1].rowtar, 0);
	out_be32((void *)&srio->atmu.port[port - 1]
	.outbw[1].rowtear, 0);
	if (port - 1)
	out_be32((void *)&srio->atmu.port[port - 1]
	.outbw[1].rowbar,
	CONFIG_SYS_SRIO2_MEM_PHYS >> 12);
	else
	out_be32((void *)&srio->atmu.port[port - 1]
	.outbw[1].rowbar,
	CONFIG_SYS_SRIO1_MEM_PHYS >> 12);
	out_be32((void *)&srio->atmu.port[port - 1]
	.outbw[1].rowar,
	SRIO_OB_ATMU_AR_MAINT
	\| atmu_size_mask(SRIO_MAINT_WIN_SIZE));

	/*
	* configure outbound window
	* with R/W attribute to set slave's BRR
	*/
	out_be32((void *)&srio->atmu.port[port - 1]
	.outbw[2].rowtar,
	SRIO_LCSBA1CSR >> 9);
	out_be32((void *)&srio->atmu.port[port - 1]
	.outbw[2].rowtear, 0);
	if (port - 1)
	out_be32((void *)&srio->atmu.port[port - 1]
	.outbw[2].rowbar,
	(CONFIG_SYS_SRIO2_MEM_PHYS
	+ SRIO_MAINT_WIN_SIZE) >> 12);
	else
	out_be32((void *)&srio->atmu.port[port - 1]
	.outbw[2].rowbar,
	(CONFIG_SYS_SRIO1_MEM_PHYS
	+ SRIO_MAINT_WIN_SIZE) >> 12);
	out_be32((void *)&srio->atmu.port[port - 1]
	.outbw[2].rowar,
	SRIO_OB_ATMU_AR_RW
	\| atmu_size_mask(SRIO_RW_WIN_SIZE));

	/*
	* Set the LCSBA1CSR register in slave
	* by the maint-outbound window
	*/
	if (port - 1) {
	out_be32((void *)CONFIG_SYS_SRIO2_MEM_VIRT
	+ SRIO_LCSBA1CSR_OFFSET,
	SRIO_LCSBA1CSR);
	while (in_be32((void *)CONFIG_SYS_SRIO2_MEM_VIRT
	+ SRIO_LCSBA1CSR_OFFSET)
	!= SRIO_LCSBA1CSR)
	;
	/*
	* And then set the BRR register
	* to release slave core
	*/
	out_be32((void *)CONFIG_SYS_SRIO2_MEM_VIRT
	+ SRIO_MAINT_WIN_SIZE
	+ CONFIG_SRIO_PCIE_BOOT_BRR_OFFSET,
	CONFIG_SRIO_PCIE_BOOT_RELEASE_MASK);
	} else {
	out_be32((void *)CONFIG_SYS_SRIO1_MEM_VIRT
	+ SRIO_LCSBA1CSR_OFFSET,
	SRIO_LCSBA1CSR);
	while (in_be32((void *)CONFIG_SYS_SRIO1_MEM_VIRT
	+ SRIO_LCSBA1CSR_OFFSET)
	!= SRIO_LCSBA1CSR)
	;
	/*
	* And then set the BRR register
	* to release slave core
	*/
	out_be32((void *)CONFIG_SYS_SRIO1_MEM_VIRT
	+ SRIO_MAINT_WIN_SIZE
	+ CONFIG_SRIO_PCIE_BOOT_BRR_OFFSET,
	CONFIG_SRIO_PCIE_BOOT_RELEASE_MASK);
	}
	debug("SRIOBOOT - MASTER: "
	"Release slave successfully! Now the slave should start up!\n");
	}
	} else
	debug("SRIOBOOT - MASTER: Port [ %d ] is not ready.\n", port);
	}
	#endif