cpu/mpc85xx/pci.c - uboot/mindspeed - Git at Google

 /*
  * Copyright 2004 Freescale Semiconductor.
  * Copyright (C) 2003 Motorola Inc.
  * Xianghua Xiao (x.xiao@motorola.com)
  *
  * See file CREDITS for list of people who contributed to this
  * project.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
  * published by the Free Software Foundation; either version 2 of
  * the License, or (at your option) any later version.
  *
  * This program is distributed in the hope that 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, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  * MA 02111-1307 USA
  */

 /*
  * PCI Configuration space access support for MPC85xx PCI Bridge
  */
 #include <common.h>
 #include <asm/cpm_85xx.h>
 #include <pci.h>

 #if defined(CONFIG_OF_FLAT_TREE)
 #include <ft_build.h>
 #endif

 #if defined(CONFIG_PCI)

 static struct pci_controller *pci_hose;

 void
 pci_mpc85xx_init(struct pci_controller *board_hose)
 {
 	u16 reg16;
 	u32 dev;

 	volatile immap_t    *immap = (immap_t *)CFG_CCSRBAR;
 	volatile ccsr_pcix_t *pcix = &immap->im_pcix;
 #ifdef CONFIG_MPC85XX_PCI2
 	volatile ccsr_pcix_t *pcix2 = &immap->im_pcix2;
 #endif
 	volatile ccsr_gur_t *gur = &immap->im_gur;
 	struct pci_controller * hose;

 	pci_hose = board_hose;

 	hose = &pci_hose[0];

 	hose->first_busno = 0;
 	hose->last_busno = 0xff;

 	pci_setup_indirect(hose,
 			   (CFG_IMMR+0x8000),
 			   (CFG_IMMR+0x8004));

 	/*
 	 * Hose scan.
 	 */
 	dev = PCI_BDF(hose->first_busno, 0, 0);
 	pci_hose_read_config_word (hose, dev, PCI_COMMAND, &reg16);
 	reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
 	pci_hose_write_config_word(hose, dev, PCI_COMMAND, reg16);

 	/*
 	 * Clear non-reserved bits in status register.
 	 */
 	pci_hose_write_config_word(hose, dev, PCI_STATUS, 0xffff);

 	if (!(gur->pordevsr & PORDEVSR_PCI)) {
 		/* PCI-X init */
 		if (CONFIG_SYS_CLK_FREQ < 66000000)
 			printf("PCI-X will only work at 66 MHz\n");

 		reg16 = PCI_X_CMD_MAX_SPLIT | PCI_X_CMD_MAX_READ
 			| PCI_X_CMD_ERO | PCI_X_CMD_DPERR_E;
 		pci_hose_write_config_word(hose, dev, PCIX_COMMAND, reg16);
 	}

 	pcix->potar1   = (CFG_PCI1_MEM_BASE >> 12) & 0x000fffff;
 	pcix->potear1  = 0x00000000;
 	pcix->powbar1  = (CFG_PCI1_MEM_PHYS >> 12) & 0x000fffff;
 	pcix->powbear1 = 0x00000000;
 	pcix->powar1 = (POWAR_EN | POWAR_MEM_READ |
 			POWAR_MEM_WRITE | POWAR_MEM_512M);

 	pcix->potar2  = (CFG_PCI1_IO_BASE >> 12) & 0x000fffff;
 	pcix->potear2  = 0x00000000;
 	pcix->powbar2  = (CFG_PCI1_IO_PHYS >> 12) & 0x000fffff;
 	pcix->powbear2 = 0x00000000;
 	pcix->powar2 = (POWAR_EN | POWAR_IO_READ |
 			POWAR_IO_WRITE | POWAR_IO_1M);

 	pcix->pitar1 = 0x00000000;
 	pcix->piwbar1 = 0x00000000;
 	pcix->piwar1 = (PIWAR_EN | PIWAR_PF | PIWAR_LOCAL |
 			PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP | PIWAR_MEM_2G);

 	pcix->powar3 = 0;
 	pcix->powar4 = 0;
 	pcix->piwar2 = 0;
 	pcix->piwar3 = 0;

 	pci_set_region(hose->regions + 0,
 		       CFG_PCI1_MEM_BASE,
 		       CFG_PCI1_MEM_PHYS,
 		       CFG_PCI1_MEM_SIZE,
 		       PCI_REGION_MEM);

 	pci_set_region(hose->regions + 1,
 		       CFG_PCI1_IO_BASE,
 		       CFG_PCI1_IO_PHYS,
 		       CFG_PCI1_IO_SIZE,
 		       PCI_REGION_IO);

 	hose->region_count = 2;

 	pci_register_hose(hose);

 #if defined(CONFIG_MPC8555CDS) || defined(CONFIG_MPC8541CDS)
 	/*
 	 * This is a SW workaround for an apparent HW problem
 	 * in the PCI controller on the MPC85555/41 CDS boards.
 	 * The first config cycle must be to a valid, known
 	 * device on the PCI bus in order to trick the PCI
 	 * controller state machine into a known valid state.
 	 * Without this, the first config cycle has the chance
 	 * of hanging the controller permanently, just leaving
 	 * it in a semi-working state, or leaving it working.
 	 *
 	 * Pick on the Tundra, Device 17, to get it right.
 	 */
 	{
 		u8 header_type;

 		pci_hose_read_config_byte(hose,
 					  PCI_BDF(0,17,0),
 					  PCI_HEADER_TYPE,
 					  &header_type);
 	}
 #endif

 	hose->last_busno = pci_hose_scan(hose);

 #ifdef CONFIG_MPC85XX_PCI2
 	hose = &pci_hose[1];

 	hose->first_busno = pci_hose[0].last_busno + 1;
 	hose->last_busno = 0xff;

 	pci_setup_indirect(hose,
 			   (CFG_IMMR+0x9000),
 			   (CFG_IMMR+0x9004));

 	dev = PCI_BDF(hose->first_busno, 0, 0);
 	pci_hose_read_config_word (hose, dev, PCI_COMMAND, &reg16);
 	reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
 	pci_hose_write_config_word(hose, dev, PCI_COMMAND, reg16);

 	/*
 	 * Clear non-reserved bits in status register.
 	 */
 	pci_hose_write_config_word(hose, dev, PCI_STATUS, 0xffff);

 	pcix2->potar1   = (CFG_PCI2_MEM_BASE >> 12) & 0x000fffff;
 	pcix2->potear1  = 0x00000000;
 	pcix2->powbar1  = (CFG_PCI2_MEM_PHYS >> 12) & 0x000fffff;
 	pcix2->powbear1 = 0x00000000;
 	pcix2->powar1 = (POWAR_EN | POWAR_MEM_READ |
 			POWAR_MEM_WRITE | POWAR_MEM_512M);

 	pcix2->potar2  = (CFG_PCI2_IO_BASE >> 12) & 0x000fffff;
 	pcix2->potear2  = 0x00000000;
 	pcix2->powbar2  = (CFG_PCI2_IO_PHYS >> 12) & 0x000fffff;
 	pcix2->powbear2 = 0x00000000;
 	pcix2->powar2 = (POWAR_EN | POWAR_IO_READ |
 			POWAR_IO_WRITE | POWAR_IO_1M);

 	pcix2->pitar1 = 0x00000000;
 	pcix2->piwbar1 = 0x00000000;
 	pcix2->piwar1 = (PIWAR_EN | PIWAR_PF | PIWAR_LOCAL |
 			PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP | PIWAR_MEM_2G);

 	pcix2->powar3 = 0;
 	pcix2->powar4 = 0;
 	pcix2->piwar2 = 0;
 	pcix2->piwar3 = 0;

 	pci_set_region(hose->regions + 0,
 		       CFG_PCI2_MEM_BASE,
 		       CFG_PCI2_MEM_PHYS,
 		       CFG_PCI2_MEM_SIZE,
 		       PCI_REGION_MEM);

 	pci_set_region(hose->regions + 1,
 		       CFG_PCI2_IO_BASE,
 		       CFG_PCI2_IO_PHYS,
 		       CFG_PCI2_IO_SIZE,
 		       PCI_REGION_IO);

 	hose->region_count = 2;

 	/*
 	 * Hose scan.
 	 */
 	pci_register_hose(hose);

 	hose->last_busno = pci_hose_scan(hose);
 #endif
 }

 #ifdef CONFIG_OF_FLAT_TREE
 void
 ft_pci_setup(void *blob, bd_t *bd)
 {
 	u32 *p;
 	int len;

 	p = (u32 *)ft_get_prop(blob, "/" OF_SOC "/pci@8000/bus-range", &len);
 	if (p != NULL) {
 		p[0] = pci_hose[0].first_busno;
 		p[1] = pci_hose[0].last_busno;
 	}

 #ifdef CONFIG_MPC85XX_PCI2
 	p = (u32 *)ft_get_prop(blob, "/" OF_SOC "/pci@9000/bus-range", &len);
 	if (p != NULL) {
 		p[0] = pci_hose[1].first_busno;
 		p[1] = pci_hose[1].last_busno;
 	}
 #endif
 }
 #endif /* CONFIG_OF_FLAT_TREE */
 #endif /* CONFIG_PCI */
	/*
	* Copyright 2004 Freescale Semiconductor.
	* Copyright (C) 2003 Motorola Inc.
	* Xianghua Xiao (x.xiao@motorola.com)
	*
	* See file CREDITS for list of people who contributed to this
	* project.
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License as
	* published by the Free Software Foundation; either version 2 of
	* the License, or (at your option) any later version.
	*
	* This program is distributed in the hope that 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, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	* MA 02111-1307 USA
	*/

	/*
	* PCI Configuration space access support for MPC85xx PCI Bridge
	*/
	#include <common.h>
	#include <asm/cpm_85xx.h>
	#include <pci.h>

	#if defined(CONFIG_OF_FLAT_TREE)
	#include <ft_build.h>
	#endif

	#if defined(CONFIG_PCI)

	static struct pci_controller *pci_hose;

	void
	pci_mpc85xx_init(struct pci_controller *board_hose)
	{
	u16 reg16;
	u32 dev;

	volatile immap_t immap = (immap_t )CFG_CCSRBAR;
	volatile ccsr_pcix_t *pcix = &immap->im_pcix;
	#ifdef CONFIG_MPC85XX_PCI2
	volatile ccsr_pcix_t *pcix2 = &immap->im_pcix2;
	#endif
	volatile ccsr_gur_t *gur = &immap->im_gur;
	struct pci_controller * hose;

	pci_hose = board_hose;

	hose = &pci_hose[0];

	hose->first_busno = 0;
	hose->last_busno = 0xff;

	pci_setup_indirect(hose,
	(CFG_IMMR+0x8000),
	(CFG_IMMR+0x8004));

	/*
	* Hose scan.
	*/
	dev = PCI_BDF(hose->first_busno, 0, 0);
	pci_hose_read_config_word (hose, dev, PCI_COMMAND, &reg16);
	reg16 \|= PCI_COMMAND_SERR \| PCI_COMMAND_MASTER \| PCI_COMMAND_MEMORY;
	pci_hose_write_config_word(hose, dev, PCI_COMMAND, reg16);

	/*
	* Clear non-reserved bits in status register.
	*/
	pci_hose_write_config_word(hose, dev, PCI_STATUS, 0xffff);

	if (!(gur->pordevsr & PORDEVSR_PCI)) {
	/* PCI-X init */
	if (CONFIG_SYS_CLK_FREQ < 66000000)
	printf("PCI-X will only work at 66 MHz\n");

	reg16 = PCI_X_CMD_MAX_SPLIT \| PCI_X_CMD_MAX_READ
	\| PCI_X_CMD_ERO \| PCI_X_CMD_DPERR_E;
	pci_hose_write_config_word(hose, dev, PCIX_COMMAND, reg16);
	}

	pcix->potar1 = (CFG_PCI1_MEM_BASE >> 12) & 0x000fffff;
	pcix->potear1 = 0x00000000;
	pcix->powbar1 = (CFG_PCI1_MEM_PHYS >> 12) & 0x000fffff;
	pcix->powbear1 = 0x00000000;
	pcix->powar1 = (POWAR_EN \| POWAR_MEM_READ \|
	POWAR_MEM_WRITE \| POWAR_MEM_512M);

	pcix->potar2 = (CFG_PCI1_IO_BASE >> 12) & 0x000fffff;
	pcix->potear2 = 0x00000000;
	pcix->powbar2 = (CFG_PCI1_IO_PHYS >> 12) & 0x000fffff;
	pcix->powbear2 = 0x00000000;
	pcix->powar2 = (POWAR_EN \| POWAR_IO_READ \|
	POWAR_IO_WRITE \| POWAR_IO_1M);

	pcix->pitar1 = 0x00000000;
	pcix->piwbar1 = 0x00000000;
	pcix->piwar1 = (PIWAR_EN \| PIWAR_PF \| PIWAR_LOCAL \|
	PIWAR_READ_SNOOP \| PIWAR_WRITE_SNOOP \| PIWAR_MEM_2G);

	pcix->powar3 = 0;
	pcix->powar4 = 0;
	pcix->piwar2 = 0;
	pcix->piwar3 = 0;

	pci_set_region(hose->regions + 0,
	CFG_PCI1_MEM_BASE,
	CFG_PCI1_MEM_PHYS,
	CFG_PCI1_MEM_SIZE,
	PCI_REGION_MEM);

	pci_set_region(hose->regions + 1,
	CFG_PCI1_IO_BASE,
	CFG_PCI1_IO_PHYS,
	CFG_PCI1_IO_SIZE,
	PCI_REGION_IO);

	hose->region_count = 2;

	pci_register_hose(hose);

	#if defined(CONFIG_MPC8555CDS) \|\| defined(CONFIG_MPC8541CDS)
	/*
	* This is a SW workaround for an apparent HW problem
	* in the PCI controller on the MPC85555/41 CDS boards.
	* The first config cycle must be to a valid, known
	* device on the PCI bus in order to trick the PCI
	* controller state machine into a known valid state.
	* Without this, the first config cycle has the chance
	* of hanging the controller permanently, just leaving
	* it in a semi-working state, or leaving it working.
	*
	* Pick on the Tundra, Device 17, to get it right.
	*/
	{
	u8 header_type;

	pci_hose_read_config_byte(hose,
	PCI_BDF(0,17,0),
	PCI_HEADER_TYPE,
	&header_type);
	}
	#endif

	hose->last_busno = pci_hose_scan(hose);

	#ifdef CONFIG_MPC85XX_PCI2
	hose = &pci_hose[1];

	hose->first_busno = pci_hose[0].last_busno + 1;
	hose->last_busno = 0xff;

	pci_setup_indirect(hose,
	(CFG_IMMR+0x9000),
	(CFG_IMMR+0x9004));

	dev = PCI_BDF(hose->first_busno, 0, 0);
	pci_hose_read_config_word (hose, dev, PCI_COMMAND, &reg16);
	reg16 \|= PCI_COMMAND_SERR \| PCI_COMMAND_MASTER \| PCI_COMMAND_MEMORY;
	pci_hose_write_config_word(hose, dev, PCI_COMMAND, reg16);

	/*
	* Clear non-reserved bits in status register.
	*/
	pci_hose_write_config_word(hose, dev, PCI_STATUS, 0xffff);

	pcix2->potar1 = (CFG_PCI2_MEM_BASE >> 12) & 0x000fffff;
	pcix2->potear1 = 0x00000000;
	pcix2->powbar1 = (CFG_PCI2_MEM_PHYS >> 12) & 0x000fffff;
	pcix2->powbear1 = 0x00000000;
	pcix2->powar1 = (POWAR_EN \| POWAR_MEM_READ \|
	POWAR_MEM_WRITE \| POWAR_MEM_512M);

	pcix2->potar2 = (CFG_PCI2_IO_BASE >> 12) & 0x000fffff;
	pcix2->potear2 = 0x00000000;
	pcix2->powbar2 = (CFG_PCI2_IO_PHYS >> 12) & 0x000fffff;
	pcix2->powbear2 = 0x00000000;
	pcix2->powar2 = (POWAR_EN \| POWAR_IO_READ \|
	POWAR_IO_WRITE \| POWAR_IO_1M);

	pcix2->pitar1 = 0x00000000;
	pcix2->piwbar1 = 0x00000000;
	pcix2->piwar1 = (PIWAR_EN \| PIWAR_PF \| PIWAR_LOCAL \|
	PIWAR_READ_SNOOP \| PIWAR_WRITE_SNOOP \| PIWAR_MEM_2G);

	pcix2->powar3 = 0;
	pcix2->powar4 = 0;
	pcix2->piwar2 = 0;
	pcix2->piwar3 = 0;

	pci_set_region(hose->regions + 0,
	CFG_PCI2_MEM_BASE,
	CFG_PCI2_MEM_PHYS,
	CFG_PCI2_MEM_SIZE,
	PCI_REGION_MEM);

	pci_set_region(hose->regions + 1,
	CFG_PCI2_IO_BASE,
	CFG_PCI2_IO_PHYS,
	CFG_PCI2_IO_SIZE,
	PCI_REGION_IO);

	hose->region_count = 2;

	/*
	* Hose scan.
	*/
	pci_register_hose(hose);

	hose->last_busno = pci_hose_scan(hose);
	#endif
	}

	#ifdef CONFIG_OF_FLAT_TREE
	void
	ft_pci_setup(void blob, bd_t bd)
	{
	u32 *p;
	int len;

	p = (u32 *)ft_get_prop(blob, "/" OF_SOC "/pci@8000/bus-range", &len);
	if (p != NULL) {
	p[0] = pci_hose[0].first_busno;
	p[1] = pci_hose[0].last_busno;
	}

	#ifdef CONFIG_MPC85XX_PCI2
	p = (u32 *)ft_get_prop(blob, "/" OF_SOC "/pci@9000/bus-range", &len);
	if (p != NULL) {
	p[0] = pci_hose[1].first_busno;
	p[1] = pci_hose[1].last_busno;
	}
	#endif
	}
	#endif /* CONFIG_OF_FLAT_TREE */
	#endif /* CONFIG_PCI */