aic79xx_osm.c

一个2.4.21版本的嵌入式linux内核

int
ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
		void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
		void *cb_arg, int flags)
{
	/*
	 * Assume for now that this will only be used during
	 * initialization and not for per-transaction buffer mapping.
	 */
	bus_dma_segment_t stack_sg;

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
	stack_sg.ds_addr = map->bus_addr;
#else
#define VIRT_TO_BUS(a) (uint32_t)virt_to_bus((void *)(a))
	stack_sg.ds_addr = VIRT_TO_BUS(buf);
#endif
	stack_sg.ds_len = dmat->maxsize;
	cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
	return (0);
}

void
ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
{
	/*
	 * The map may is NULL in our < 2.3.X implementation.
	 */
	if (map != NULL)
		free(map, M_DEVBUF);
}

int
ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
{
	/* Nothing to do */
	return (0);
}

/********************* Platform Dependent Functions ***************************/
int
ahd_softc_comp(struct ahd_softc *lahd, struct ahd_softc *rahd)
{
	int	value;
	char	primary_channel;

	/*
	 * Under Linux, cards are ordered as follows:
	 *	1) PCI devices with BIOS enabled sorted by bus/slot/func.
	 *	2) All remaining PCI devices sorted by bus/slot/func.
	 */
	value = (lahd->flags & AHD_BIOS_ENABLED)
	      - (rahd->flags & AHD_BIOS_ENABLED);
	if (value != 0)
		/* Controllers with BIOS enabled have a *higher* priority */
		return (-value);

	/* Still equal.  Sort by bus/slot/func. */
	if (aic79xx_reverse_scan != 0)
		value = ahd_get_pci_bus(rahd->dev_softc)
		      - ahd_get_pci_bus(lahd->dev_softc);
	else
		value = ahd_get_pci_bus(lahd->dev_softc)
		      - ahd_get_pci_bus(rahd->dev_softc);
	if (value != 0)
		return (value);
	if (aic79xx_reverse_scan != 0)
		value = ahd_get_pci_slot(rahd->dev_softc)
		      - ahd_get_pci_slot(lahd->dev_softc);
	else
		value = ahd_get_pci_slot(lahd->dev_softc)
		      - ahd_get_pci_slot(rahd->dev_softc);
	if (value != 0)
		return (value);

	/*
	 * On multi-function devices, the user can choose
	 * to have function 1 probed before function 0.
	 * Give whichever channel is the primary channel
	 * the lowest priority.
	 */
	primary_channel = (lahd->flags & AHD_PRIMARY_CHANNEL) + 'A';
	value = 1;
	if (lahd->channel == primary_channel)
		value = -1;
	return (value);
}

static void
ahd_linux_setup_tag_info(char *p, char *end, char *s)
{
	char	*base;
	char	*tok;
	char	*tok_end;
	char	*tok_end2;
	int      i;
	int      instance;
	int	 targ;
	int	 done;
	char	 tok_list[] = {'.', ',', '{', '}', '\0'};

	if (*p != ':')
		return;

	instance = -1;
	targ = -1;
	done = FALSE;
	base = p;
	/* Forward us just past the ':' */
	tok = base + 1;
	tok_end = strchr(tok, '\0');
	if (tok_end < end)
		*tok_end = ',';
	while (!done) {
		switch (*tok) {
		case '{':
			if (instance == -1)
				instance = 0;
			else if (targ == -1)
				targ = 0;
			tok++;
			break;
		case '}':
			if (targ != -1)
				targ = -1;
			else if (instance != -1)
				instance = -1;
			tok++;
			break;
		case ',':
		case '.':
			if (instance == -1)
				done = TRUE;
			else if (targ >= 0)
				targ++;
			else if (instance >= 0)
				instance++;
			if ((targ >= AHD_NUM_TARGETS) ||
			    (instance >= NUM_ELEMENTS(aic79xx_tag_info)))
				done = TRUE;
			tok++;
			if (!done) {
				base = tok;
			}
			break;
		case '\0':
			done = TRUE;
			break;
		default:
			done = TRUE;
			tok_end = strchr(tok, '\0');
			for (i = 0; tok_list[i]; i++) {
				tok_end2 = strchr(tok, tok_list[i]);
				if ((tok_end2) && (tok_end2 < tok_end)) {
					tok_end = tok_end2;
					done = FALSE;
				}
			}
			if ((instance >= 0) && (targ >= 0)
			 && (instance < NUM_ELEMENTS(aic79xx_tag_info))
			 && (targ < AHD_NUM_TARGETS)) {
				aic79xx_tag_info[instance].tag_commands[targ] =
				    simple_strtoul(tok, NULL, 0) & 0xff;
			}
			tok = tok_end;
			break;
		}
	}
	while ((p != base) && (p != NULL))
		p = strsep(&s, ",.");
}

static void
ahd_linux_setup_rd_strm_info(char *p, char *end, char *s)
{
	char	*base;
	char	*tok;
	char	*tok_end;
	char	*tok_end2;
	int      i;
	int      instance;
	int	 done;
	char	 tok_list[] = {'.', ',', '{', '}', '\0'};

	if (*p != ':')
		return;

	instance = -1;
	done = FALSE;
	base = p;
	/* Forward us just past the ':' */
	tok = base + 1;
	tok_end = strchr(tok, '\0');
	if (tok_end < end)
		*tok_end = ',';
	while (!done) {
		switch (*tok) {
		case '{':
			if (instance == -1)
				instance = 0;
			tok++;
			break;
		case '}':
			if (instance != -1)
				instance = -1;
			tok++;
			break;
		case ',':
		case '.':
			if (instance == -1)
				done = TRUE;
			else if (instance >= 0)
				instance++;
			if (instance >= NUM_ELEMENTS(aic79xx_rd_strm_info))
				done = TRUE;
			tok++;
			if (!done) {
				base = tok;
			}
			break;
		case '\0':
			done = TRUE;
			break;
		default:
			done = TRUE;
			tok_end = strchr(tok, '\0');
			for (i = 0; tok_list[i]; i++) {
				tok_end2 = strchr(tok, tok_list[i]);
				if ((tok_end2) && (tok_end2 < tok_end)) {
					tok_end = tok_end2;
					done = FALSE;
				}
			}
			if ((instance >= 0)
			 && (instance < NUM_ELEMENTS(aic79xx_rd_strm_info))) {
				aic79xx_rd_strm_info[instance] =
				    simple_strtoul(tok, NULL, 0) & 0xffff;
			}
			tok = tok_end;
			break;
		}
	}
	while ((p != base) && (p != NULL))
		p = strsep(&s, ",.");
}

static void
ahd_linux_setup_dv(char *p, char *end, char *s)
{
	char	*base;
	char	*tok;
	char	*tok_end;
	char	*tok_end2;
	int      i;
	int      instance;
	int	 done;
	char	 tok_list[] = {'.', ',', '{', '}', '\0'};

	if (*p != ':')
		return;

	instance = -1;
	done = FALSE;
	base = p;
	/* Forward us just past the ':' */
	tok = base + 1;
	tok_end = strchr(tok, '\0');
	if (tok_end < end)
		*tok_end = ',';
	while (!done) {
		switch (*tok) {
		case '{':
			if (instance == -1)
				instance = 0;
			tok++;
			break;
		case '}':
			if (instance != -1)
				instance = -1;
			tok++;
			break;
		case ',':
		case '.':
			if (instance == -1)
				done = TRUE;
			else if (instance >= 0)
				instance++;
			if (instance >= NUM_ELEMENTS(aic79xx_dv_settings))
				done = TRUE;
			tok++;
			if (!done) {
				base = tok;
			}
			break;
		case '\0':
			done = TRUE;
			break;
		default:
			done = TRUE;
			tok_end = strchr(tok, '\0');
			for (i = 0; tok_list[i]; i++) {
				tok_end2 = strchr(tok, tok_list[i]);
				if ((tok_end2) && (tok_end2 < tok_end)) {
					tok_end = tok_end2;
					done = FALSE;
				}
			}
			if ((instance >= 0)
			 && (instance < NUM_ELEMENTS(aic79xx_dv_settings))) {
				aic79xx_dv_settings[instance] =
				    simple_strtol(tok, NULL, 0);
			}
			tok = tok_end;
			break;
		}
	}
	while ((p != base) && (p != NULL))
		p = strsep(&s, ",.");
}

static void
ahd_linux_setup_iocell_info(char *p, char *end, char *s, int index)
{
	char	*base;
	char	*tok;
	char	*tok_end;
	char	*tok_end2;
	uint8_t	*iocell_info;
	int      i;
	int      instance;
	int	 done;
	char	 tok_list[] = {'.', ',', '{', '}', '\0'};

	if (*p != ':')
		return;

	instance = -1;
	done = FALSE;
	base = p;
	/* Forward us just past the ':' */
	tok = base + 1;
	tok_end = strchr(tok, '\0');
	if (tok_end < end)
		*tok_end = ',';
	while (!done) {
		switch (*tok) {
		case '{':
			if (instance == -1)
				instance = 0;
			tok++;
			break;
		case '}':
			if (instance != -1)
				instance = -1;
			tok++;
			break;
		case ',':
		case '.':
			if (instance == -1)
				done = TRUE;
			else if (instance >= 0)
				instance++;
			if (instance >= NUM_ELEMENTS(aic79xx_iocell_info))
				done = TRUE;
			tok++;
			if (!done) {
				base = tok;
			}
			break;
		case '\0':
			done = TRUE;
			break;
		default:
			done = TRUE;
			tok_end = strchr(tok, '\0');
			for (i = 0; tok_list[i]; i++) {
				tok_end2 = strchr(tok, tok_list[i]);
				if ((tok_end2) && (tok_end2 < tok_end)) {
					tok_end = tok_end2;
					done = FALSE;
				}
			}
			if ((instance >= 0)
			 && (instance < NUM_ELEMENTS(aic79xx_iocell_info))) {
				iocell_info =
				    (uint8_t*)&aic79xx_iocell_info[instance];
				iocell_info[index] = 
				    simple_strtoul(tok, NULL, 0) & 0xffff;
			}
			tok = tok_end;
			break;
		}
	}
	while ((p != base) && (p != NULL))
		p = strsep(&s, ",.");
}

static void
ahd_linux_setup_tag_info_global(char *p)
{
	int tags, i, j;

	tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
	printf("Setting Global Tags= %d\n", tags);

	for (i = 0; i < NUM_ELEMENTS(aic79xx_tag_info); i++) {
		for (j = 0; j < AHD_NUM_TARGETS; j++) {
			aic79xx_tag_info[i].tag_commands[j] = tags;
		}
	}
}

/*
 * Handle Linux boot parameters. This routine allows for assigning a value
 * to a parameter with a ':' between the parameter and the value.
 * ie. aic79xx=stpwlev:1,extended
 */
static int
aic79xx_setup(char *s)
{
	int	i, n;
	char   *p;
	char   *end;

	static struct {
		const char *name;
		uint32_t *flag;
	} options[] = {
		{ "extended", &aic79xx_extended },
		{ "no_reset", &aic79xx_no_reset },
		{ "verbose", &aic79xx_verbose },
		{ "allow_memio", &aic79xx_allow_memio},
#ifdef AHD_DEBUG
		{ "debug", &ahd_debug },
#endif
		{ "reverse_scan", &aic79xx_reverse_scan },
		{ "periodic_otag", &aic79xx_periodic_otag },
		{ "pci_parity", &aic79xx_pci_parity },
		{ "seltime", &aic79xx_seltime },
		{ "tag_info", NULL },
		{ "global_tag_depth", NULL},
		{ "rd_strm", NULL },
		{ "dv", NULL },
		{ "slewrate", NULL },
		{ "precomp", NULL },
		{ "amplitude", NULL },
	};

	end = strchr(s, '\0');

	while ((p = strsep(&s, ",.")) != NULL) {
		if (*p == '\0')
			continue;
		for (i = 0; i < NUM_ELEMENTS(options); i++) {
			n = strlen(options[i].name);

			if (strncmp(options[i].name, p, n) != 0)
				continue;

			if (!strncmp(p, "global_tag_depth", n)) {
				ahd_linux_setup_tag_info_global(