cs.c

来自「Linux Kernel 2.6.9 for OMAP1710」· C语言 代码 · 共 2,183 行 · 第 1/4 页

    for (w = idx; w < MAX_WIN; w++)
	if (s->state & SOCKET_WIN_REQ(w)) break;
    if (w == MAX_WIN)
	return CS_NO_MORE_ITEMS;
    win = &s->win[w];
    req->Base = win->ctl.res->start;
    req->Size = win->ctl.res->end - win->ctl.res->start + 1;
    req->AccessSpeed = win->ctl.speed;
    req->Attributes = 0;
    if (win->ctl.flags & MAP_ATTRIB)
	req->Attributes |= WIN_MEMORY_TYPE_AM;
    if (win->ctl.flags & MAP_ACTIVE)
	req->Attributes |= WIN_ENABLE;
    if (win->ctl.flags & MAP_16BIT)
	req->Attributes |= WIN_DATA_WIDTH_16;
    if (win->ctl.flags & MAP_USE_WAIT)
	req->Attributes |= WIN_USE_WAIT;
    *handle = win;
    return CS_SUCCESS;
} /* get_window */

int pcmcia_get_first_window(window_handle_t *win, win_req_t *req)
{
    if ((win == NULL) || ((*win)->magic != WINDOW_MAGIC))
	return CS_BAD_HANDLE;
    return pcmcia_get_window(win, 0, req);
}

int pcmcia_get_next_window(window_handle_t *win, win_req_t *req)
{
    if ((win == NULL) || ((*win)->magic != WINDOW_MAGIC))
	return CS_BAD_HANDLE;
    return pcmcia_get_window(win, (*win)->index+1, req);
}

/*=====================================================================

    Return the PCI device associated with a card..

======================================================================*/

#ifdef CONFIG_CARDBUS

struct pci_bus *pcmcia_lookup_bus(client_handle_t handle)
{
	struct pcmcia_socket *s;

	if (CHECK_HANDLE(handle))
		return NULL;
	s = SOCKET(handle);
	if (!(s->state & SOCKET_CARDBUS))
		return NULL;

	return s->cb_dev->subordinate;
}

EXPORT_SYMBOL(pcmcia_lookup_bus);

#endif

/*======================================================================

    Get the current socket state bits.  We don't support the latched
    SocketState yet: I haven't seen any point for it.
    
======================================================================*/

int pcmcia_get_status(client_handle_t handle, cs_status_t *status)
{
    struct pcmcia_socket *s;
    config_t *c;
    int val;
    
    if (CHECK_HANDLE(handle))
	return CS_BAD_HANDLE;
    s = SOCKET(handle);
    s->ops->get_status(s, &val);
    status->CardState = status->SocketState = 0;
    status->CardState |= (val & SS_DETECT) ? CS_EVENT_CARD_DETECT : 0;
    status->CardState |= (val & SS_CARDBUS) ? CS_EVENT_CB_DETECT : 0;
    status->CardState |= (val & SS_3VCARD) ? CS_EVENT_3VCARD : 0;
    status->CardState |= (val & SS_XVCARD) ? CS_EVENT_XVCARD : 0;
    if (s->state & SOCKET_SUSPEND)
	status->CardState |= CS_EVENT_PM_SUSPEND;
    if (!(s->state & SOCKET_PRESENT))
	return CS_NO_CARD;
    
    /* Get info from the PRR, if necessary */
    if (handle->Function == BIND_FN_ALL) {
	if (status->Function && (status->Function >= s->functions))
	    return CS_BAD_ARGS;
	c = (s->config != NULL) ? &s->config[status->Function] : NULL;
    } else
	c = CONFIG(handle);
    if ((c != NULL) && (c->state & CONFIG_LOCKED) &&
	(c->IntType & (INT_MEMORY_AND_IO | INT_ZOOMED_VIDEO))) {
	u_char reg;
	if (c->Present & PRESENT_PIN_REPLACE) {
	    read_cis_mem(s, 1, (c->ConfigBase+CISREG_PRR)>>1, 1, &reg);
	    status->CardState |=
		(reg & PRR_WP_STATUS) ? CS_EVENT_WRITE_PROTECT : 0;
	    status->CardState |=
		(reg & PRR_READY_STATUS) ? CS_EVENT_READY_CHANGE : 0;
	    status->CardState |=
		(reg & PRR_BVD2_STATUS) ? CS_EVENT_BATTERY_LOW : 0;
	    status->CardState |=
		(reg & PRR_BVD1_STATUS) ? CS_EVENT_BATTERY_DEAD : 0;
	} else {
	    /* No PRR?  Then assume we're always ready */
	    status->CardState |= CS_EVENT_READY_CHANGE;
	}
	if (c->Present & PRESENT_EXT_STATUS) {
	    read_cis_mem(s, 1, (c->ConfigBase+CISREG_ESR)>>1, 1, &reg);
	    status->CardState |=
		(reg & ESR_REQ_ATTN) ? CS_EVENT_REQUEST_ATTENTION : 0;
	}
	return CS_SUCCESS;
    }
    status->CardState |=
	(val & SS_WRPROT) ? CS_EVENT_WRITE_PROTECT : 0;
    status->CardState |=
	(val & SS_BATDEAD) ? CS_EVENT_BATTERY_DEAD : 0;
    status->CardState |=
	(val & SS_BATWARN) ? CS_EVENT_BATTERY_LOW : 0;
    status->CardState |=
	(val & SS_READY) ? CS_EVENT_READY_CHANGE : 0;
    return CS_SUCCESS;
} /* get_status */

/*======================================================================

    Change the card address of an already open memory window.
    
======================================================================*/

int pcmcia_get_mem_page(window_handle_t win, memreq_t *req)
{
    if ((win == NULL) || (win->magic != WINDOW_MAGIC))
	return CS_BAD_HANDLE;
    req->Page = 0;
    req->CardOffset = win->ctl.card_start;
    return CS_SUCCESS;
} /* get_mem_page */

int pcmcia_map_mem_page(window_handle_t win, memreq_t *req)
{
    struct pcmcia_socket *s;
    if ((win == NULL) || (win->magic != WINDOW_MAGIC))
	return CS_BAD_HANDLE;
    if (req->Page != 0)
	return CS_BAD_PAGE;
    s = win->sock;
    win->ctl.card_start = req->CardOffset;
    if (s->ops->set_mem_map(s, &win->ctl) != 0)
	return CS_BAD_OFFSET;
    return CS_SUCCESS;
} /* map_mem_page */

/*======================================================================

    Modify a locked socket configuration
    
======================================================================*/

int pcmcia_modify_configuration(client_handle_t handle,
				modconf_t *mod)
{
    struct pcmcia_socket *s;
    config_t *c;
    
    if (CHECK_HANDLE(handle))
	return CS_BAD_HANDLE;
    s = SOCKET(handle); c = CONFIG(handle);
    if (!(s->state & SOCKET_PRESENT))
	return CS_NO_CARD;
    if (!(c->state & CONFIG_LOCKED))
	return CS_CONFIGURATION_LOCKED;
    
    if (mod->Attributes & CONF_IRQ_CHANGE_VALID) {
	if (mod->Attributes & CONF_ENABLE_IRQ) {
	    c->Attributes |= CONF_ENABLE_IRQ;
	    s->socket.io_irq = s->irq.AssignedIRQ;
	} else {
	    c->Attributes &= ~CONF_ENABLE_IRQ;
	    s->socket.io_irq = 0;
	}
	s->ops->set_socket(s, &s->socket);
    }

    if (mod->Attributes & CONF_VCC_CHANGE_VALID)
	return CS_BAD_VCC;

    /* We only allow changing Vpp1 and Vpp2 to the same value */
    if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) &&
	(mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
	if (mod->Vpp1 != mod->Vpp2)
	    return CS_BAD_VPP;
	c->Vpp1 = c->Vpp2 = s->socket.Vpp = mod->Vpp1;
	if (s->ops->set_socket(s, &s->socket))
	    return CS_BAD_VPP;
    } else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) ||
	       (mod->Attributes & CONF_VPP2_CHANGE_VALID))
	return CS_BAD_VPP;

    return CS_SUCCESS;
} /* modify_configuration */

/*======================================================================

    Modify the attributes of a window returned by RequestWindow.

======================================================================*/

int pcmcia_modify_window(window_handle_t win, modwin_t *req)
{
    if ((win == NULL) || (win->magic != WINDOW_MAGIC))
	return CS_BAD_HANDLE;

    win->ctl.flags &= ~(MAP_ATTRIB|MAP_ACTIVE);
    if (req->Attributes & WIN_MEMORY_TYPE)
	win->ctl.flags |= MAP_ATTRIB;
    if (req->Attributes & WIN_ENABLE)
	win->ctl.flags |= MAP_ACTIVE;
    if (req->Attributes & WIN_DATA_WIDTH_16)
	win->ctl.flags |= MAP_16BIT;
    if (req->Attributes & WIN_USE_WAIT)
	win->ctl.flags |= MAP_USE_WAIT;
    win->ctl.speed = req->AccessSpeed;
    win->sock->ops->set_mem_map(win->sock, &win->ctl);
    
    return CS_SUCCESS;
} /* modify_window */

/*======================================================================

    Register_client() uses the dev_info_t handle to match the
    caller with a socket.  The driver must have already been bound
    to a socket with bind_device() -- in fact, bind_device()
    allocates the client structure that will be used.
    
======================================================================*/

int pcmcia_register_client(client_handle_t *handle, client_reg_t *req)
{
    client_t *client = NULL;
    struct pcmcia_socket *s;
    
    /* Look for unbound client with matching dev_info */
    down_read(&pcmcia_socket_list_rwsem);
    list_for_each_entry(s, &pcmcia_socket_list, socket_list) {
	client = s->clients;
	while (client != NULL) {
	    if ((strcmp(client->dev_info, (char *)req->dev_info) == 0)
		&& (client->state & CLIENT_UNBOUND)) break;
	    client = client->next;
	}
	if (client != NULL) break;
    }
    up_read(&pcmcia_socket_list_rwsem);
    if (client == NULL)
	return CS_OUT_OF_RESOURCE;

    /*
     * Prevent this racing with a card insertion.
     */
    down(&s->skt_sem);
    *handle = client;
    client->state &= ~CLIENT_UNBOUND;
    client->Socket = s;
    client->Attributes = req->Attributes;
    client->EventMask = req->EventMask;
    client->event_handler = req->event_handler;
    client->event_callback_args = req->event_callback_args;
    client->event_callback_args.client_handle = client;

    if (s->state & SOCKET_CARDBUS)
	client->state |= CLIENT_CARDBUS;
    
    if ((!(s->state & SOCKET_CARDBUS)) && (s->functions == 0) &&
	(client->Function != BIND_FN_ALL)) {
	cistpl_longlink_mfc_t mfc;
	if (read_tuple(client, CISTPL_LONGLINK_MFC, &mfc)
	    == CS_SUCCESS)
	    s->functions = mfc.nfn;
	else
	    s->functions = 1;
	s->config = kmalloc(sizeof(config_t) * s->functions,
			    GFP_KERNEL);
	if (!s->config)
		goto out_no_resource;
	memset(s->config, 0, sizeof(config_t) * s->functions);
    }
    
    cs_dbg(s, 1, "register_client(): client 0x%p, dev %s\n",
	   client, client->dev_info);
    if (client->EventMask & CS_EVENT_REGISTRATION_COMPLETE)
	EVENT(client, CS_EVENT_REGISTRATION_COMPLETE, CS_EVENT_PRI_LOW);

    if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) {
	if (client->EventMask & CS_EVENT_CARD_INSERTION)
	    EVENT(client, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
	else
	    client->PendingEvents |= CS_EVENT_CARD_INSERTION;
    }

    up(&s->skt_sem);
    return CS_SUCCESS;

 out_no_resource:
    up(&s->skt_sem);
    return CS_OUT_OF_RESOURCE;
} /* register_client */

/*====================================================================*/

int pcmcia_release_configuration(client_handle_t handle)
{
    pccard_io_map io = { 0, 0, 0, 0, 1 };
    struct pcmcia_socket *s;
    int i;
    
    if (CHECK_HANDLE(handle) ||
	!(handle->state & CLIENT_CONFIG_LOCKED))
	return CS_BAD_HANDLE;
    handle->state &= ~CLIENT_CONFIG_LOCKED;
    s = SOCKET(handle);
    
#ifdef CONFIG_CARDBUS
    if (handle->state & CLIENT_CARDBUS)
	return CS_SUCCESS;
#endif
    
    if (!(handle->state & CLIENT_STALE)) {
	config_t *c = CONFIG(handle);
	if (--(s->lock_count) == 0) {
	    s->socket.flags = SS_OUTPUT_ENA;   /* Is this correct? */
	    s->socket.Vpp = 0;
	    s->socket.io_irq = 0;
	    s->ops->set_socket(s, &s->socket);
	}
	if (c->state & CONFIG_IO_REQ)
	    for (i = 0; i < MAX_IO_WIN; i++) {
		if (s->io[i].NumPorts == 0)
		    continue;
		s->io[i].Config--;
		if (s->io[i].Config != 0)
		    continue;
		io.map = i;
		s->ops->set_io_map(s, &io);
	    }
	c->state &= ~CONFIG_LOCKED;
    }
    
    return CS_SUCCESS;
} /* release_configuration */

/*======================================================================

    Release_io() releases the I/O ranges allocated by a client.  This
    may be invoked some time after a card ejection has already dumped
    the actual socket configuration, so if the client is "stale", we
    don't bother checking the port ranges against the current socket
    values.
    
======================================================================*/

int pcmcia_release_io(client_handle_t handle, io_req_t *req)
{
    struct pcmcia_socket *s;
    
    if (CHECK_HANDLE(handle) || !(handle->state & CLIENT_IO_REQ))
	return CS_BAD_HANDLE;
    handle->state &= ~CLIENT_IO_REQ;
    s = SOCKET(handle);
    
#ifdef CONFIG_CARDBUS
    if (handle->state & CLIENT_CARDBUS)
	return CS_SUCCESS;
#endif
    
    if (!(handle->state & CLIENT_STALE)) {
	config_t *c = CONFIG(handle);
	if (c->state & CONFIG_LOCKED)
	    return CS_CONFIGURATION_LOCKED;
	if ((c->io.BasePort1 != req->BasePort1) ||
	    (c->io.NumPorts1 != req->NumPorts1) ||
	    (c->io.BasePort2 != req->BasePort2) ||
	    (c->io.NumPorts2 != req->NumPorts2))
	    return CS_BAD_ARGS;
	c->state &= ~CONFIG_IO_REQ;
    }

    release_io_space(s, req->BasePort1, req->NumPorts1);
    if (req->NumPorts2)
	release_io_space(s, req->BasePort2, req->NumPorts2);
    
    return CS_SUCCESS;
} /* release_io */

/*====================================================================*/

int pcmcia_release_irq(client_handle_t handle, irq_req_t *req)
{
    struct pcmcia_socket *s;
    if (CHECK_HANDLE(handle) || !(handle->state & CLIENT_IRQ_REQ))
	return CS_BAD_HANDLE;
    handle->state &= ~CLIENT_IRQ_REQ;
    s = SOCKET(handle);
    
    if (!(handle->state & CLIENT_STALE)) {
	config_t *c = CONFIG(handle);
	if (c->state & CONFIG_LOCKED)
	    return CS_CONFIGURATION_LOCKED;
	if (c->irq.Attributes != req->Attributes)
	    return CS_BAD_ATTRIBUTE;
	if (s->irq.AssignedIRQ != req->AssignedIRQ)
	    return CS_BAD_IRQ;
	if (--s->irq.Config == 0) {
	    c->state &= ~CONFIG_IRQ_REQ;
	    s->irq.AssignedIRQ = 0;
	}
    }
    
    if (req->Attributes & IRQ_HANDLE_PRESENT) {
	free_irq(req->AssignedIRQ, req->Instance);
    }

#ifdef CONFIG_PCMCIA_PROBE
    if (req->AssignedIRQ != s->pci_irq)
	undo_irq(req->Attributes, req->AssignedIRQ);
#endif
    
    return CS_SUCCESS;
} /* cs_release_irq */

/*====================================================================*/

int pcmcia_release_window(window_handle_t win)
{
    struct pcmcia_socket *s;
    
    if ((win == NULL) || (win->magic != WINDOW_MAGIC))
	return CS_BAD_HANDLE;
    s = win->sock;
    if (!(win->handle->state & CLIENT_WIN_REQ(win->index)))
	return CS_BAD_HANDLE;

    /* Shut down memory window */
    win->ctl.flags &= ~MAP_ACTIVE;
    s->ops->set_mem_map(s, &win->ctl);
    s->state &= ~SOCKET_WIN_REQ(win->index);

    /* Release system memory */
    if (win->ctl.res) {
	release_resource(win->ctl.res);
	kfree(win->ctl.res);
	win->ctl.res = NULL;
    }
    win->handle->state &= ~CLIENT_WIN_REQ(win->index);

    win->magic = 0;
    
    return CS_SUCCESS;
} /* release_window */

/*====================================================================*/

int pcmcia_request_configuration(client_handle_t handle,
				 config_req_t *req)
{
    int i;
    u_int base;
    struct pcmcia_socket *s;
    config_t *c;
    pccard_io_map iomap;
    
    if (CHECK_HANDLE(handle))
	return CS_BAD_HANDLE;
    s = SOCKET(handle);
    if (!(s->state & SOCKET_PRESENT))
	return CS_NO_CARD;
    
#ifdef CONFIG_CARDBUS
    if (handle->state & CLIENT_CARDBUS)
	return CS_UNSUPPORTED_MODE;
#endif
    
    if (req->IntType & INT_CARDBUS)
	return CS_UNSUPPORTED_MODE;
    c = CONFIG(handle);
    if (c->state & CONFIG_LOCKED)
	return CS_CONFIGURATION_LOCKED;

    /* Do power control.  We don't allow changes in Vcc. */
    if (s->socket.Vcc != req->Vcc)
	return CS_BAD_VCC;
    if (req->Vpp1 != req->Vpp2)
	return CS_BAD_VPP;
    s->socket.Vpp = req->Vpp1;
    if (s->ops->set_socket(s, &s->socket))
	return CS_BAD_VPP;
    
    c->Vcc = req->Vcc; c->Vpp1 = c->Vpp2 = req->Vpp1;
    
    /* Pick memory or I/O card, DMA mode, interrupt */
    c->IntType = req->IntType;
    c->Attributes = req->Attributes;
    if (req->IntType & INT_MEMORY_AND_IO)
	s->socket.flags |= SS_IOCARD;
    if (req->IntType & INT_ZOOMED_VIDEO)
	s->socket.flags |= SS_ZVCARD | SS_IOCARD;
    if (req->Attributes & CONF_ENABLE_DMA)
	s->socket.flags |= SS_DMA_MODE;
    if (req->Attributes & CONF_ENABLE_SPKR)
	s->socket.flags |= SS_SPKR_ENA;
    if (req->Attributes & CONF_ENABLE_IRQ)
	s->socket.io_irq = s->irq.AssignedIRQ;
    else
	s->socket.io_irq = 0;
    s->ops->set_socket(s, &s->socket);
    s->lock_count++;
    
    /* Set up CIS configuration registers */
    base = c->ConfigBase = req->ConfigBase;
    c->Present = c->CardValues = req->Present;
    if (req->Present & PRESENT_COPY) {
	c->Copy = req->Copy;
	write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy);
    }
    if (req->Present & PRESENT_OPTION) {
	if (s->functions == 1) {
	    c->Option = req->ConfigIndex & COR_CONFIG_MASK;
	} else {
	    c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK;
	    c->Option |= COR_FUNC_ENA|COR_IREQ_ENA;
	    if (req->Present & PRESENT_IOBASE_0)
		c->Option |= COR_ADDR_DECODE;
	}
	if (c->state & CONFIG_IRQ_REQ)
	    if (!(c->irq.Attributes & IRQ_FORCED_PULSE))
		c->Option |= COR_LEVEL_REQ;
	write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option);
	mdelay(40);
    }
    if (req->Present & PRESENT_STATUS) {
	c->Status = req->Status;