u-boot/board/evb64260/zuma_pbb_mbox.c

#include <common.h>
#include <galileo/pci.h>
#include <net.h>
#include <pci.h>

#include "zuma_pbb.h"
#include "zuma_pbb_mbox.h"


struct _zuma_mbox_dev zuma_mbox_dev;


static int zuma_mbox_write(struct _zuma_mbox_dev *dev, unsigned int data)
{
	unsigned int status, count = 0, i;

	status = (volatile int) le32_to_cpu(dev->sip->mbox_status);

	while ((status & OUT_PENDING) && count < 1000) {
		count++;
		for (i = 0; i < 1000; i++)
			;
		status = (volatile int) le32_to_cpu(dev->sip->mbox_status);
	}
	if (count < 1000) {
		/* if SET it means msg pending */
		/* printf("mbox real write %08x\n",data); */
		dev->sip->mbox_out = cpu_to_le32(data);
		return 4;
	}

	printf("mbox tx timeout\n");
	return 0;
}

static int zuma_mbox_read(struct _zuma_mbox_dev *dev, unsigned int *data)
{
	unsigned int status, count = 0, i;

	status = (volatile int) le32_to_cpu(dev->sip->mbox_status);

	while (!(status & IN_VALID) && count < 1000) {
		count++;
		for (i = 0; i < 1000; i++)
			;
		status = (volatile int) le32_to_cpu(dev->sip->mbox_status);
	}
	if (count < 1000) {
		/* if SET it means msg pending */
		*data = le32_to_cpu(dev->sip->mbox_in);
		/*printf("mbox real read %08x\n", *data); */
		return 4;
	}
	printf("mbox rx timeout\n");
	return 0;
}

static int zuma_mbox_do_one_mailbox(unsigned int out, unsigned int *in)
{
	int ret;

	ret = zuma_mbox_write(&zuma_mbox_dev, out);
	/*printf("write 0x%08x (%d bytes)\n", out, ret); */
	if (ret != 4)
		return -1;
	ret = zuma_mbox_read(&zuma_mbox_dev, in);
	/*printf("read 0x%08x (%d bytes)\n", *in, ret); */
	if (ret != 4)
		return -1;
	return 0;
}


#define RET_IF_FAILED(x)	if ((x) == -1) return -1

static int zuma_mbox_do_all_mailbox(void)
{
	unsigned int data_in;
	unsigned short sdata_in;

	RET_IF_FAILED(zuma_mbox_do_one_mailbox(ZUMA_MBOXMSG_START, &data_in));

	RET_IF_FAILED(zuma_mbox_do_one_mailbox(ZUMA_MBOXMSG_MACL, &data_in));
	memcpy(zuma_acc_mac + 2, &data_in, 4);
	RET_IF_FAILED(zuma_mbox_do_one_mailbox(ZUMA_MBOXMSG_MACH, &data_in));
	sdata_in = data_in & 0xffff;
	memcpy(zuma_acc_mac, &sdata_in, 2);

	RET_IF_FAILED(zuma_mbox_do_one_mailbox(ZUMA_MBOXMSG_IP, &data_in));
	zuma_ip = data_in;

	RET_IF_FAILED(zuma_mbox_do_one_mailbox(ZUMA_MBOXMSG_SLOT, &data_in));
	zuma_slot_bac = data_in >> 3;

	RET_IF_FAILED(zuma_mbox_do_one_mailbox(ZUMA_MBOXMSG_BAUD, &data_in));
	zuma_console_baud = data_in & 0xffff;
	zuma_debug_baud = data_in >> 16;

	RET_IF_FAILED(zuma_mbox_do_one_mailbox
		      (ZUMA_MBOXMSG_ENG_PRV_MACL, &data_in));
	memcpy(zuma_prv_mac + 2, &data_in, 4);
	RET_IF_FAILED(zuma_mbox_do_one_mailbox
		      (ZUMA_MBOXMSG_ENG_PRV_MACH, &data_in));
	sdata_in = data_in & 0xffff;
	memcpy(zuma_prv_mac, &sdata_in, 2);

	RET_IF_FAILED(zuma_mbox_do_one_mailbox(ZUMA_MBOXMSG_DONE, &data_in));

	return 0;
}


static void zuma_mbox_dump(void)
{
	printf("ACC MAC=%04x%08x\n", *(unsigned short *) (&zuma_acc_mac),
	       *(unsigned int *) ((char *) &zuma_acc_mac + 2));
	printf("PRV MAC=%04x%08x\n", *(unsigned short *) (&zuma_prv_mac),
	       *(unsigned int *) ((char *) &zuma_prv_mac + 2));
	printf("slot:bac=%d:%d\n", (zuma_slot_bac >> 2) & 0xf,
	       zuma_slot_bac & 0x3);
	printf("BAUD1=%d BAUD2=%d\n", zuma_console_baud, zuma_debug_baud);
}


static void zuma_mbox_setenv(void)
{
	char *data, buf[32];
	unsigned char save = 0;

	data = getenv("baudrate");

	if (!data || (zuma_console_baud != simple_strtoul(data, NULL, 10))) {
		sprintf(buf, "%6d", zuma_console_baud);
		setenv("baudrate", buf);
		save = 1;
		printf("baudrate doesn't match from mbox\n");
	}

	ip_to_string(zuma_ip, buf);
	setenv("ipaddr", buf);

	sprintf(buf, "%02x:%02x:%02x:%02x:%02x:%02x",
		zuma_prv_mac[0],
		zuma_prv_mac[1],
		zuma_prv_mac[2],
		zuma_prv_mac[3], zuma_prv_mac[4], zuma_prv_mac[5]);
	setenv("ethaddr", buf);

	sprintf(buf, "%02x", zuma_slot_bac);
	setenv("bacslot", buf);

	if (save)
		saveenv();
}

/**
 *	zuma_mbox_init:
 */

int zuma_mbox_init(void)
{
	unsigned int iobase;

	memset(&zuma_mbox_dev, 0, sizeof(struct _zuma_mbox_dev));

	zuma_mbox_dev.dev =
		pci_find_device(VENDOR_ID_ZUMA, DEVICE_ID_ZUMA_PBB, 0);

	if (zuma_mbox_dev.dev == -1) {
		printf("no zuma pbb\n");
		return -1;
	}

	pci_read_config_dword(zuma_mbox_dev.dev, PCI_BASE_ADDRESS_0, &iobase);

	iobase &= PCI_BASE_ADDRESS_MEM_MASK;

	zuma_mbox_dev.sip = (PBB_DMA_REG_MAP *) iobase;

	zuma_mbox_dev.sip->int_mask.word = 0;

	printf("pbb @ %p v%d.%d, timestamp %08x\n", zuma_mbox_dev.sip,
	       zuma_mbox_dev.sip->version.pci_bits.rev_major,
	       zuma_mbox_dev.sip->version.pci_bits.rev_minor,
	       zuma_mbox_dev.sip->timestamp);

	if (zuma_mbox_do_all_mailbox() == -1) {
		printf("mailbox failed.. no ACC?\n");
		return -1;
	}

	zuma_mbox_dump();

	zuma_mbox_setenv();

	return 0;
}