/*
   * (C) Copyright 2009 Reinhard Arlt, reinhard.arlt@esd-electronics.com
   *
   * base on universe.h by
   *
   * (C) Copyright 2003 Stefan Roese, stefan.roese@esd-electronics.com
   *

   * SPDX-License-Identifier:	GPL-2.0+

   */

  #include <common.h>
  #include <command.h>
  #include <malloc.h>
  #include <asm/io.h>
  #include <pci.h>
  
  #include <tsi148.h>
  
  #define PCI_VENDOR PCI_VENDOR_ID_TUNDRA
  #define PCI_DEVICE PCI_DEVICE_ID_TUNDRA_TSI148
  
  typedef struct _TSI148_DEV TSI148_DEV;
  
  struct _TSI148_DEV {

  	int           bus;
  	pci_dev_t     busdevfn;
  	TSI148       *uregs;
  	unsigned int  pci_bs;

  };
  
  static TSI148_DEV *dev;
  
  /*
   * Most of the TSI148 register are BIGENDIAN
   * This is the reason for the __raw_writel(htonl(x), x) usage!
   */
  
  int tsi148_init(void)
  {

  	int j, result;

  	pci_dev_t busdevfn;
  	unsigned int val;
  
  	busdevfn = pci_find_device(PCI_VENDOR, PCI_DEVICE, 0);
  	if (busdevfn == -1) {
  		puts("Tsi148: No Tundra Tsi148 found!
  ");
  		return -1;
  	}
  
  	/* Lets turn Latency off */
  	pci_write_config_dword(busdevfn, 0x0c, 0);
  
  	dev = malloc(sizeof(*dev));
  	if (NULL == dev) {
  		puts("Tsi148: No memory!
  ");

  		return -1;

  	}
  
  	memset(dev, 0, sizeof(*dev));
  	dev->busdevfn = busdevfn;
  
  	pci_read_config_dword(busdevfn, PCI_BASE_ADDRESS_0, &val);
  	val &= ~0xf;
  	dev->uregs = (TSI148 *)val;
  
  	debug("Tsi148: Base    : %p
  ", dev->uregs);

  	/* check mapping */
  	debug("Tsi148: Read via mapping, PCI_ID = %08X
  ",
  	      readl(&dev->uregs->pci_id));
  	if (((PCI_DEVICE << 16) | PCI_VENDOR) != readl(&dev->uregs->pci_id)) {

  		printf("Tsi148: Cannot read PCI-ID via Mapping: %08x
  ",

  		       readl(&dev->uregs->pci_id));

  		result = -1;
  		goto break_30;
  	}
  
  	debug("Tsi148: PCI_BS = %08X
  ", readl(&dev->uregs->pci_mbarl));
  
  	dev->pci_bs = readl(&dev->uregs->pci_mbarl);
  
  	/* turn off windows */
  	for (j = 0; j < 8; j++) {
  		__raw_writel(htonl(0x00000000), &dev->uregs->outbound[j].otat);
  		__raw_writel(htonl(0x00000000), &dev->uregs->inbound[j].itat);
  	}
  
  	/* Tsi148 VME timeout etc */
  	__raw_writel(htonl(0x00000084), &dev->uregs->vctrl);

  #ifdef DEBUG

  	if ((__raw_readl(&dev->uregs->vstat) & 0x00000100) != 0)

  		printf("Tsi148: System Controller!
  ");

  	else

  		printf("Tsi148: Not System Controller!
  ");
  #endif

  
  	/*
  	 * Lets turn off interrupts
  	 */
  	/* Disable interrupts in Tsi148 first */
  	__raw_writel(htonl(0x00000000), &dev->uregs->inten);
  	/* Disable interrupt out */
  	__raw_writel(htonl(0x00000000), &dev->uregs->inteo);
  	eieio();
  	/* Reset all IRQ's */
  	__raw_writel(htonl(0x03ff3f00), &dev->uregs->intc);
  	/* Map all ints to 0 */
  	__raw_writel(htonl(0x00000000), &dev->uregs->intm1);
  	__raw_writel(htonl(0x00000000), &dev->uregs->intm2);
  	eieio();

  	val = __raw_readl(&dev->uregs->vstat);

  	val &= ~(0x00004000);
  	__raw_writel(val, &dev->uregs->vstat);
  	eieio();
  
  	debug("Tsi148: register struct size %08x
  ", sizeof(TSI148));
  
  	return 0;
  
   break_30:
  	free(dev);
  	dev = NULL;

  
  	return result;
  }
  
  /*
   * Create pci slave window (access: pci -> vme)
   */

  int tsi148_pci_slave_window(unsigned int pciAddr, unsigned int vmeAddr,
  			    int size, int vam, int vdw)

  {
  	int result, i;
  	unsigned int ctl = 0;
  
  	if (NULL == dev) {
  		result = -1;
  		goto exit_10;
  	}
  
  	for (i = 0; i < 8; i++) {
  		if (0x00000000 == readl(&dev->uregs->outbound[i].otat))
  			break;
  	}
  
  	if (i > 7) {
  		printf("Tsi148: No Image available
  ");
  		result = -1;
  		goto exit_10;
  	}
  
  	debug("Tsi148: Using image %d
  ", i);
  
  	printf("Tsi148: Pci addr %08x
  ", pciAddr);

  	__raw_writel(htonl(pciAddr), &dev->uregs->outbound[i].otsal);
  	__raw_writel(0x00000000, &dev->uregs->outbound[i].otsau);

  	__raw_writel(htonl(pciAddr + size), &dev->uregs->outbound[i].oteal);

  	__raw_writel(0x00000000, &dev->uregs->outbound[i].oteau);

  	__raw_writel(htonl(vmeAddr - pciAddr), &dev->uregs->outbound[i].otofl);

  	__raw_writel(0x00000000, &dev->uregs->outbound[i].otofu);

  
  	switch (vam & VME_AM_Axx) {
  	case VME_AM_A16:
  		ctl = 0x00000000;
  		break;
  	case VME_AM_A24:
  		ctl = 0x00000001;
  		break;
  	case VME_AM_A32:
  		ctl = 0x00000002;
  		break;
  	}
  
  	switch (vam & VME_AM_Mxx) {
  	case VME_AM_DATA:
  		ctl |= 0x00000000;
  		break;
  	case VME_AM_PROG:
  		ctl |= 0x00000010;
  		break;
  	}
  
  	if (vam & VME_AM_SUP)
  		ctl |= 0x00000020;
  
  	switch (vdw & VME_FLAG_Dxx) {
  	case VME_FLAG_D16:
  		ctl |= 0x00000000;
  		break;
  	case VME_FLAG_D32:
  		ctl |= 0x00000040;
  		break;
  	}

  	ctl |= 0x80040000;	/* enable, no prefetch */

  
  	__raw_writel(htonl(ctl), &dev->uregs->outbound[i].otat);
  
  	debug("Tsi148: window-addr                =%p
  ",
  	      &dev->uregs->outbound[i].otsau);
  	debug("Tsi148: pci slave window[%d] attr  =%08x
  ",
  	      i, ntohl(__raw_readl(&dev->uregs->outbound[i].otat)));
  	debug("Tsi148: pci slave window[%d] start =%08x
  ",
  	      i, ntohl(__raw_readl(&dev->uregs->outbound[i].otsal)));
  	debug("Tsi148: pci slave window[%d] end   =%08x
  ",
  	      i, ntohl(__raw_readl(&dev->uregs->outbound[i].oteal)));
  	debug("Tsi148: pci slave window[%d] offset=%08x
  ",
  	      i, ntohl(__raw_readl(&dev->uregs->outbound[i].otofl)));
  
  	return 0;
  
   exit_10:
  	return -result;
  }
  
  unsigned int tsi148_eval_vam(int vam)
  {
  	unsigned int ctl = 0;
  
  	switch (vam & VME_AM_Axx) {
  	case VME_AM_A16:
  		ctl = 0x00000000;
  		break;
  	case VME_AM_A24:
  		ctl = 0x00000010;
  		break;
  	case VME_AM_A32:
  		ctl = 0x00000020;
  		break;
  	}
  	switch (vam & VME_AM_Mxx) {
  	case VME_AM_DATA:
  		ctl |= 0x00000001;
  		break;
  	case VME_AM_PROG:
  		ctl |= 0x00000002;
  		break;
  	case (VME_AM_PROG | VME_AM_DATA):
  		ctl |= 0x00000003;
  		break;
  	}
  
  	if (vam & VME_AM_SUP)
  		ctl |= 0x00000008;
  	if (vam & VME_AM_USR)
  		ctl |= 0x00000004;
  
  	return ctl;
  }
  
  /*
   * Create vme slave window (access: vme -> pci)
   */

  int tsi148_vme_slave_window(unsigned int vmeAddr, unsigned int pciAddr,
  			    int size, int vam)

  {
  	int result, i;
  	unsigned int ctl = 0;
  
  	if (NULL == dev) {
  		result = -1;
  		goto exit_10;
  	}
  
  	for (i = 0; i < 8; i++) {
  		if (0x00000000 == readl(&dev->uregs->inbound[i].itat))
  			break;
  	}
  
  	if (i > 7) {
  		printf("Tsi148: No Image available
  ");
  		result = -1;
  		goto exit_10;
  	}
  
  	debug("Tsi148: Using image %d
  ", i);
  
  	__raw_writel(htonl(vmeAddr), &dev->uregs->inbound[i].itsal);
  	__raw_writel(0x00000000, &dev->uregs->inbound[i].itsau);
  	__raw_writel(htonl(vmeAddr + size), &dev->uregs->inbound[i].iteal);
  	__raw_writel(0x00000000, &dev->uregs->inbound[i].iteau);
  	__raw_writel(htonl(pciAddr - vmeAddr), &dev->uregs->inbound[i].itofl);
  	if (vmeAddr > pciAddr)
  		__raw_writel(0xffffffff, &dev->uregs->inbound[i].itofu);
  	else
  		__raw_writel(0x00000000, &dev->uregs->inbound[i].itofu);
  
  	ctl = tsi148_eval_vam(vam);

  	ctl |= 0x80000000;	/* enable */

  	__raw_writel(htonl(ctl), &dev->uregs->inbound[i].itat);
  
  	debug("Tsi148: window-addr                =%p
  ",
  	      &dev->uregs->inbound[i].itsau);
  	debug("Tsi148: vme slave window[%d] attr  =%08x
  ",

  	      i, ntohl(__raw_readl(&dev->uregs->inbound[i].itat)));

  	debug("Tsi148: vme slave window[%d] start =%08x
  ",
  	      i, ntohl(__raw_readl(&dev->uregs->inbound[i].itsal)));
  	debug("Tsi148: vme slave window[%d] end   =%08x
  ",
  	      i, ntohl(__raw_readl(&dev->uregs->inbound[i].iteal)));
  	debug("Tsi148: vme slave window[%d] offset=%08x
  ",
  	      i, ntohl(__raw_readl(&dev->uregs->inbound[i].itofl)));
  
  	return 0;
  
   exit_10:
  	return -result;
  }
  
  /*
   * Create vme slave window (access: vme -> gcsr)
   */
  int tsi148_vme_gcsr_window(unsigned int vmeAddr, int vam)
  {
  	int result;
  	unsigned int ctl;
  
  	result = 0;
  
  	if (NULL == dev) {
  		result = 1;
  	} else {

  		__raw_writel(htonl(vmeAddr), &dev->uregs->gbal);
  		__raw_writel(0x00000000, &dev->uregs->gbau);

  		ctl = tsi148_eval_vam(vam);
  		ctl |= 0x00000080;	/* enable */
  		__raw_writel(htonl(ctl), &dev->uregs->gcsrat);

  	}
  
  	return result;
  }
  
  /*
   * Create vme slave window (access: vme -> crcsr)
   */
  int tsi148_vme_crcsr_window(unsigned int vmeAddr)
  {
  	int result;
  	unsigned int ctl;
  
  	result = 0;
  
  	if (NULL == dev) {
  		result = 1;
  	} else {

  		__raw_writel(htonl(vmeAddr), &dev->uregs->crol);
  		__raw_writel(0x00000000, &dev->uregs->crou);

  		ctl = 0x00000080;	/* enable */
  		__raw_writel(htonl(ctl), &dev->uregs->crat);

  	}
  
  	return result;
  }

  /*
   * Create vme slave window (access: vme -> crg)
   */
  int tsi148_vme_crg_window(unsigned int vmeAddr, int vam)
  {
  	int result;
  	unsigned int ctl;
  
  	result = 0;
  
  	if (NULL == dev) {
  		result = 1;
  	} else {

  		__raw_writel(htonl(vmeAddr), &dev->uregs->cbal);
  		__raw_writel(0x00000000, &dev->uregs->cbau);

  		ctl = tsi148_eval_vam(vam);
  		ctl |= 0x00000080;	/* enable */
  		__raw_writel(htonl(ctl), &dev->uregs->crgat);

  	}
  
  	return result;
  }
  
  /*
   * Tundra Tsi148 configuration
   */

  int do_tsi148(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])

  {
  	ulong addr1 = 0, addr2 = 0, size = 0, vam = 0, vdw = 0;
  	char cmd = 'x';
  
  	/* get parameter */
  	if (argc > 1)
  		cmd = argv[1][0];
  	if (argc > 2)
  		addr1 = simple_strtoul(argv[2], NULL, 16);
  	if (argc > 3)
  		addr2 = simple_strtoul(argv[3], NULL, 16);
  	if (argc > 4)
  		size = simple_strtoul(argv[4], NULL, 16);
  	if (argc > 5)
  		vam = simple_strtoul(argv[5], NULL, 16);
  	if (argc > 6)

  		vdw = simple_strtoul(argv[6], NULL, 16);

  
  	switch (cmd) {
  	case 'c':
  		if (strcmp(argv[1], "crg") == 0) {
  			vam = addr2;

  			printf("Tsi148: Configuring VME CRG Window "
  			       "(VME->CRG):
  ");

  			printf("  vme=%08lx vam=%02lx
  ", addr1, vam);
  			tsi148_vme_crg_window(addr1, vam);
  		} else {

  			printf("Tsi148: Configuring VME CR/CSR Window "
  			       "(VME->CR/CSR):
  ");

  			printf("  pci=%08lx
  ", addr1);
  			tsi148_vme_crcsr_window(addr1);
  		}
  		break;
  	case 'i':		/* init */
  		tsi148_init();
  		break;
  	case 'g':
  		vam = addr2;
  		printf("Tsi148: Configuring VME GCSR Window (VME->GCSR):
  ");
  		printf("  vme=%08lx vam=%02lx
  ", addr1, vam);
  		tsi148_vme_gcsr_window(addr1, vam);
  		break;
  	case 'v':		/* vme */
  		printf("Tsi148: Configuring VME Slave Window (VME->PCI):
  ");
  		printf("  vme=%08lx pci=%08lx size=%08lx vam=%02lx
  ",
  		       addr1, addr2, size, vam);
  		tsi148_vme_slave_window(addr1, addr2, size, vam);
  		break;
  	case 'p':		/* pci */
  		printf("Tsi148: Configuring PCI Slave Window (PCI->VME):
  ");
  		printf("  pci=%08lx vme=%08lx size=%08lx vam=%02lx vdw=%02lx
  ",
  		       addr1, addr2, size, vam, vdw);
  		tsi148_pci_slave_window(addr1, addr2, size, vam, vdw);
  		break;
  	default:
  		printf("Tsi148: Command %s not supported!
  ", argv[1]);
  	}
  
  	return 0;
  }
  
  U_BOOT_CMD(

  	tsi148,	7,	1,	do_tsi148,

  	"initialize and configure Turndra Tsi148
  ",

  	"init
  "
  	"    - initialize tsi148
  "
  	"tsi148 vme   [vme_addr] [pci_addr] [size] [vam]
  "
  	"    - create vme slave window (access: vme->pci)
  "
  	"tsi148 pci   [pci_addr] [vme_addr] [size] [vam] [vdw]
  "
  	"    - create pci slave window (access: pci->vme)
  "
  	"tsi148 crg   [vme_addr] [vam]
  "
  	"    - create vme slave window: (access vme->CRG
  "
  	"tsi148 crcsr [pci_addr]
  "
  	"    - create vme slave window: (access vme->CR/CSR
  "
  	"tsi148 gcsr  [vme_addr] [vam]
  "
  	"    - create vme slave window: (access vme->GCSR
  "
  	"    [vam] = VMEbus Address-Modifier:  01 -> A16 Address Space
  "
  	"                                      02 -> A24 Address Space
  "
  	"                                      03 -> A32 Address Space
  "
  	"                                      04 -> Usr        AM Code
  "
  	"                                      08 -> Supervisor AM Code
  "
  	"                                      10 -> Data AM Code
  "
  	"                                      20 -> Program AM Code
  "
  	"    [vdw] = VMEbus Maximum Datawidth: 02 -> D16 Data Width
  "
  	"                                      03 -> D32 Data Width
  "
  );