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linux/drivers/net/wireless/libertas/if_cs.c

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/*
Driver for the Marvell 8385 based compact flash WLAN cards.
(C) 2007 by Holger Schurig <hs4233@mail.mn-solutions.de>
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; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/moduleparam.h>
#include <linux/firmware.h>
#include <linux/netdevice.h>
#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/ds.h>
#include <linux/io.h>
#define DRV_NAME "libertas_cs"
#include "decl.h"
#include "defs.h"
#include "dev.h"
/********************************************************************/
/* Module stuff */
/********************************************************************/
MODULE_AUTHOR("Holger Schurig <hs4233@mail.mn-solutions.de>");
MODULE_DESCRIPTION("Driver for Marvell 83xx compact flash WLAN cards");
MODULE_LICENSE("GPL");
/********************************************************************/
/* Data structures */
/********************************************************************/
struct if_cs_card {
struct pcmcia_device *p_dev;
wlan_private *priv;
void __iomem *iobase;
};
/********************************************************************/
/* Hardware access */
/********************************************************************/
/* This define enables wrapper functions which allow you
to dump all register accesses. You normally won't this,
except for development */
/* #define DEBUG_IO */
#ifdef DEBUG_IO
static int debug_output = 0;
#else
/* This way the compiler optimizes the printk's away */
#define debug_output 0
#endif
static inline unsigned int if_cs_read8(struct if_cs_card *card, uint reg)
{
unsigned int val = ioread8(card->iobase + reg);
if (debug_output)
printk(KERN_INFO "##inb %08x<%02x\n", reg, val);
return val;
}
static inline unsigned int if_cs_read16(struct if_cs_card *card, uint reg)
{
unsigned int val = ioread16(card->iobase + reg);
if (debug_output)
printk(KERN_INFO "##inw %08x<%04x\n", reg, val);
return val;
}
static inline void if_cs_read16_rep(
struct if_cs_card *card,
uint reg,
void *buf,
unsigned long count)
{
if (debug_output)
printk(KERN_INFO "##insw %08x<(0x%lx words)\n",
reg, count);
ioread16_rep(card->iobase + reg, buf, count);
}
static inline void if_cs_write8(struct if_cs_card *card, uint reg, u8 val)
{
if (debug_output)
printk(KERN_INFO "##outb %08x>%02x\n", reg, val);
iowrite8(val, card->iobase + reg);
}
static inline void if_cs_write16(struct if_cs_card *card, uint reg, u16 val)
{
if (debug_output)
printk(KERN_INFO "##outw %08x>%04x\n", reg, val);
iowrite16(val, card->iobase + reg);
}
static inline void if_cs_write16_rep(
struct if_cs_card *card,
uint reg,
void *buf,
unsigned long count)
{
if (debug_output)
printk(KERN_INFO "##outsw %08x>(0x%lx words)\n",
reg, count);
iowrite16_rep(card->iobase + reg, buf, count);
}
/*
* I know that polling/delaying is frowned upon. However, this procedure
* with polling is needed while downloading the firmware. At this stage,
* the hardware does unfortunately not create any interrupts.
*
* Fortunately, this function is never used once the firmware is in
* the card. :-)
*
* As a reference, see the "Firmware Specification v5.1", page 18
* and 19. I did not follow their suggested timing to the word,
* but this works nice & fast anyway.
*/
static int if_cs_poll_while_fw_download(struct if_cs_card *card, uint addr, u8 reg)
{
int i;
for (i = 0; i < 500; i++) {
u8 val = if_cs_read8(card, addr);
if (val == reg)
return i;
udelay(100);
}
return -ETIME;
}
/* Host control registers and their bit definitions */
#define IF_CS_H_STATUS 0x00000000
#define IF_CS_H_STATUS_TX_OVER 0x0001
#define IF_CS_H_STATUS_RX_OVER 0x0002
#define IF_CS_H_STATUS_DNLD_OVER 0x0004
#define IF_CS_H_INT_CAUSE 0x00000002
#define IF_CS_H_IC_TX_OVER 0x0001
#define IF_CS_H_IC_RX_OVER 0x0002
#define IF_CS_H_IC_DNLD_OVER 0x0004
#define IF_CS_H_IC_HOST_EVENT 0x0008
#define IF_CS_H_IC_MASK 0x001f
#define IF_CS_H_INT_MASK 0x00000004
#define IF_CS_H_IM_MASK 0x001f
#define IF_CS_H_WRITE_LEN 0x00000014
#define IF_CS_H_WRITE 0x00000016
#define IF_CS_H_CMD_LEN 0x00000018
#define IF_CS_H_CMD 0x0000001A
#define IF_CS_C_READ_LEN 0x00000024
#define IF_CS_H_READ 0x00000010
/* Card control registers and their bit definitions */
#define IF_CS_C_STATUS 0x00000020
#define IF_CS_C_S_TX_DNLD_RDY 0x0001
#define IF_CS_C_S_RX_UPLD_RDY 0x0002
#define IF_CS_C_S_CMD_DNLD_RDY 0x0004
#define IF_CS_C_S_CMD_UPLD_RDY 0x0008
#define IF_CS_C_S_CARDEVENT 0x0010
#define IF_CS_C_S_MASK 0x001f
#define IF_CS_C_S_STATUS_MASK 0x7f00
/* The following definitions should be the same as the MRVDRV_ ones */
#if MRVDRV_CMD_DNLD_RDY != IF_CS_C_S_CMD_DNLD_RDY
#error MRVDRV_CMD_DNLD_RDY and IF_CS_C_S_CMD_DNLD_RDY not in sync
#endif
#if MRVDRV_CMD_UPLD_RDY != IF_CS_C_S_CMD_UPLD_RDY
#error MRVDRV_CMD_UPLD_RDY and IF_CS_C_S_CMD_UPLD_RDY not in sync
#endif
#if MRVDRV_CARDEVENT != IF_CS_C_S_CARDEVENT
#error MRVDRV_CARDEVENT and IF_CS_C_S_CARDEVENT not in sync
#endif
#define IF_CS_C_INT_CAUSE 0x00000022
#define IF_CS_C_IC_MASK 0x001f
#define IF_CS_C_SQ_READ_LOW 0x00000028
#define IF_CS_C_SQ_HELPER_OK 0x10
#define IF_CS_C_CMD_LEN 0x00000030
#define IF_CS_C_CMD 0x00000012
#define IF_CS_SCRATCH 0x0000003F
/********************************************************************/
/* Interrupts */
/********************************************************************/
static inline void if_cs_enable_ints(struct if_cs_card *card)
{
lbs_deb_enter(LBS_DEB_CS);
if_cs_write16(card, IF_CS_H_INT_MASK, 0);
}
static inline void if_cs_disable_ints(struct if_cs_card *card)
{
lbs_deb_enter(LBS_DEB_CS);
if_cs_write16(card, IF_CS_H_INT_MASK, IF_CS_H_IM_MASK);
}
static irqreturn_t if_cs_interrupt(int irq, void *data)
{
struct if_cs_card *card = (struct if_cs_card *)data;
u16 int_cause;
lbs_deb_enter(LBS_DEB_CS);
int_cause = if_cs_read16(card, IF_CS_C_INT_CAUSE);
switch (int_cause) {
case 0x0000:
/* not for us */
return IRQ_NONE;
case 0xffff:
/* if one reads junk, then probably the card was removed */
card->priv->adapter->surpriseremoved = 1;
break;
case IF_CS_H_IC_TX_OVER:
if (card->priv->adapter->connect_status == LIBERTAS_CONNECTED)
netif_wake_queue(card->priv->dev);
/* fallthrought */
default:
/* clear interrupt */
if_cs_write16(card, IF_CS_C_INT_CAUSE, int_cause & IF_CS_C_IC_MASK);
if_cs_disable_ints(card);
}
libertas_interrupt(card->priv->dev);
return IRQ_HANDLED;
}
/********************************************************************/
/* I/O */
/********************************************************************/
/*
* Called from if_cs_host_to_card to send a command to the hardware
*/
static int if_cs_send_cmd(wlan_private *priv, u8 *buf, u16 nb)
{
struct if_cs_card *card = (struct if_cs_card *)priv->card;
int ret = -1;
int loops = 0;
lbs_deb_enter(LBS_DEB_CS);
/* Is hardware ready? */
while (1) {
u16 val = if_cs_read16(card, IF_CS_C_STATUS);
if (val & IF_CS_C_S_CMD_DNLD_RDY)
break;
if (++loops > 100) {
lbs_pr_err("card not ready for commands\n");
goto done;
}
mdelay(1);
}
if_cs_write16(card, IF_CS_H_CMD_LEN, nb);
if_cs_write16_rep(card, IF_CS_H_CMD, buf, nb / 2);
/* Are we supposed to transfer an odd amount of bytes? */
if (nb & 1)
if_cs_write8(card, IF_CS_H_CMD, buf[nb-1]);
/* "Assert the download over interrupt command in the Host
* status register" */
if_cs_write16(card, IF_CS_H_STATUS, IF_CS_H_STATUS_DNLD_OVER);
/* "Assert the download over interrupt command in the Card
* interrupt case register" */
if_cs_write16(card, IF_CS_H_INT_CAUSE, IF_CS_H_IC_DNLD_OVER);
ret = 0;
done:
lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
return ret;
}
/*
* Called from if_cs_host_to_card to send a data to the hardware
*/
static void if_cs_send_data(wlan_private *priv, u8 *buf, u16 nb)
{
struct if_cs_card *card = (struct if_cs_card *)priv->card;
lbs_deb_enter(LBS_DEB_CS);
if_cs_write16(card, IF_CS_H_WRITE_LEN, nb);
/* write even number of bytes, then odd byte if necessary */
if_cs_write16_rep(card, IF_CS_H_WRITE, buf, nb / 2);
if (nb & 1)
if_cs_write8(card, IF_CS_H_WRITE, buf[nb-1]);
if_cs_write16(card, IF_CS_H_STATUS, IF_CS_H_STATUS_TX_OVER);
if_cs_write16(card, IF_CS_H_INT_CAUSE, IF_CS_H_STATUS_TX_OVER);
lbs_deb_leave(LBS_DEB_CS);
}
/*
* Get the command result out of the card.
*/
static int if_cs_receive_cmdres(wlan_private *priv, u8* data, u32 *len)
{
int ret = -1;
u16 val;
lbs_deb_enter(LBS_DEB_CS);
/* is hardware ready? */
val = if_cs_read16(priv->card, IF_CS_C_STATUS);
if ((val & IF_CS_C_S_CMD_UPLD_RDY) == 0) {
lbs_pr_err("card not ready for CMD\n");
goto out;
}
*len = if_cs_read16(priv->card, IF_CS_C_CMD_LEN);
if ((*len == 0) || (*len > MRVDRV_SIZE_OF_CMD_BUFFER)) {
lbs_pr_err("card cmd buffer has invalid # of bytes (%d)\n", *len);
goto out;
}
/* read even number of bytes, then odd byte if necessary */
if_cs_read16_rep(priv->card, IF_CS_C_CMD, data, *len/sizeof(u16));
if (*len & 1)
data[*len-1] = if_cs_read8(priv->card, IF_CS_C_CMD);
ret = 0;
out:
lbs_deb_leave_args(LBS_DEB_CS, "ret %d, len %d", ret, *len);
return ret;
}
static struct sk_buff *if_cs_receive_data(wlan_private *priv)
{
struct sk_buff *skb = NULL;
u16 len;
u8 *data;
lbs_deb_enter(LBS_DEB_CS);
len = if_cs_read16(priv->card, IF_CS_C_READ_LEN);
if (len == 0 || len > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) {
lbs_pr_err("card data buffer has invalid # of bytes (%d)\n", len);
priv->stats.rx_dropped++;
printk(KERN_INFO "##HS %s:%d TODO\n", __FUNCTION__, __LINE__);
goto dat_err;
}
//TODO: skb = dev_alloc_skb(len+ETH_FRAME_LEN+MRVDRV_SNAP_HEADER_LEN+EXTRA_LEN);
skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE);
if (!skb)
goto out;
data = skb_put(skb, len);
/* read even number of bytes, then odd byte if necessary */
if_cs_read16_rep(priv->card, IF_CS_H_READ, data, len/sizeof(u16));
if (len & 1)
data[len-1] = if_cs_read8(priv->card, IF_CS_H_READ);
dat_err:
if_cs_write16(priv->card, IF_CS_H_STATUS, IF_CS_H_STATUS_RX_OVER);
if_cs_write16(priv->card, IF_CS_H_INT_CAUSE, IF_CS_H_IC_RX_OVER);
out:
lbs_deb_leave_args(LBS_DEB_CS, "ret %p", skb);
return skb;
}
/********************************************************************/
/* Firmware */
/********************************************************************/
/*
* Tries to program the helper firmware.
*
* Return 0 on success
*/
static int if_cs_prog_helper(struct if_cs_card *card)
{
int ret = 0;
int sent = 0;
u8 scratch;
const struct firmware *fw;
lbs_deb_enter(LBS_DEB_CS);
scratch = if_cs_read8(card, IF_CS_SCRATCH);
/* "If the value is 0x5a, the firmware is already
* downloaded successfully"
*/
if (scratch == 0x5a)
goto done;
/* "If the value is != 00, it is invalid value of register */
if (scratch != 0x00) {
ret = -ENODEV;
goto done;
}
/* TODO: make firmware file configurable */
ret = request_firmware(&fw, "libertas_cs_helper.fw",
&handle_to_dev(card->p_dev));
if (ret) {
lbs_pr_err("can't load helper firmware\n");
ret = -ENODEV;
goto done;
}
lbs_deb_cs("helper size %d\n", fw->size);
/* "Set the 5 bytes of the helper image to 0" */
/* Not needed, this contains an ARM branch instruction */
for (;;) {
/* "the number of bytes to send is 256" */
int count = 256;
int remain = fw->size - sent;
if (remain < count)
count = remain;
/* printk(KERN_INFO "//HS %d loading %d of %d bytes\n",
__LINE__, sent, fw->size); */
/* "write the number of bytes to be sent to the I/O Command
* write length register" */
if_cs_write16(card, IF_CS_H_CMD_LEN, count);
/* "write this to I/O Command port register as 16 bit writes */
if (count)
if_cs_write16_rep(card, IF_CS_H_CMD,
&fw->data[sent],
count >> 1);
/* "Assert the download over interrupt command in the Host
* status register" */
if_cs_write8(card, IF_CS_H_STATUS, IF_CS_H_STATUS_DNLD_OVER);
/* "Assert the download over interrupt command in the Card
* interrupt case register" */
if_cs_write16(card, IF_CS_H_INT_CAUSE, IF_CS_H_IC_DNLD_OVER);
/* "The host polls the Card Status register ... for 50 ms before
declaring a failure */
ret = if_cs_poll_while_fw_download(card, IF_CS_C_STATUS,
IF_CS_C_S_CMD_DNLD_RDY);
if (ret < 0) {
lbs_pr_err("can't download helper at 0x%x, ret %d\n",
sent, ret);
goto done;
}
if (count == 0)
break;
sent += count;
}
release_firmware(fw);
ret = 0;
done:
lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
return ret;
}
static int if_cs_prog_real(struct if_cs_card *card)
{
const struct firmware *fw;
int ret = 0;
int retry = 0;
int len = 0;
int sent;
lbs_deb_enter(LBS_DEB_CS);
/* TODO: make firmware file configurable */
ret = request_firmware(&fw, "libertas_cs.fw",
&handle_to_dev(card->p_dev));
if (ret) {
lbs_pr_err("can't load firmware\n");
ret = -ENODEV;
goto done;
}
lbs_deb_cs("fw size %d\n", fw->size);
ret = if_cs_poll_while_fw_download(card, IF_CS_C_SQ_READ_LOW, IF_CS_C_SQ_HELPER_OK);
if (ret < 0) {
int i;
lbs_pr_err("helper firmware doesn't answer\n");
for (i = 0; i < 0x50; i += 2)
printk(KERN_INFO "## HS %02x: %04x\n",
i, if_cs_read16(card, i));
goto err_release;
}
for (sent = 0; sent < fw->size; sent += len) {
len = if_cs_read16(card, IF_CS_C_SQ_READ_LOW);
/* printk(KERN_INFO "//HS %d loading %d of %d bytes\n",
__LINE__, sent, fw->size); */
if (len & 1) {
retry++;
lbs_pr_info("odd, need to retry this firmware block\n");
} else {
retry = 0;
}
if (retry > 20) {
lbs_pr_err("could not download firmware\n");
ret = -ENODEV;
goto err_release;
}
if (retry) {
sent -= len;
}
if_cs_write16(card, IF_CS_H_CMD_LEN, len);
if_cs_write16_rep(card, IF_CS_H_CMD,
&fw->data[sent],
(len+1) >> 1);
if_cs_write8(card, IF_CS_H_STATUS, IF_CS_H_STATUS_DNLD_OVER);
if_cs_write16(card, IF_CS_H_INT_CAUSE, IF_CS_H_IC_DNLD_OVER);
ret = if_cs_poll_while_fw_download(card, IF_CS_C_STATUS,
IF_CS_C_S_CMD_DNLD_RDY);
if (ret < 0) {
lbs_pr_err("can't download firmware at 0x%x\n", sent);
goto err_release;
}
}
ret = if_cs_poll_while_fw_download(card, IF_CS_SCRATCH, 0x5a);
if (ret < 0) {
lbs_pr_err("firmware download failed\n");
goto err_release;
}
ret = 0;
goto done;
err_release:
release_firmware(fw);
done:
lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
return ret;
}
/********************************************************************/
/* Callback functions for libertas.ko */
/********************************************************************/
static int if_cs_register_dev(wlan_private *priv)
{
struct if_cs_card *card = (struct if_cs_card *)priv->card;
lbs_deb_enter(LBS_DEB_CS);
card->priv = priv;
return 0;
}
static int if_cs_unregister_dev(wlan_private *priv)
{
lbs_deb_enter(LBS_DEB_CS);
/*
* Nothing special here. Because the device's power gets turned off
* anyway, there's no need to send a RESET command like in if_usb.c
*/
return 0;
}
/*
* This callback is a dummy. The reason is that the USB code needs
* to have various things set up in order to be able to download the
* firmware. That's not needed in our case.
*
* On the contrary, if libertas_add_card() has been called and we're
* then later called via libertas_activate_card(), but without a valid
* firmware, then it's quite tedious to tear down the half-installed
* card. Therefore, we download the firmware before calling adding/
* activating the card in the first place. If that doesn't work, we
* won't call into libertas.ko at all.
*/
static int if_cs_prog_firmware(wlan_private *priv)
{
priv->adapter->fw_ready = 1;
return 0;
}
/* Send commands or data packets to the card */
static int if_cs_host_to_card(wlan_private *priv, u8 type, u8 *buf, u16 nb)
{
int ret = -1;
lbs_deb_enter_args(LBS_DEB_CS, "type %d, bytes %d", type, nb);
switch (type) {
case MVMS_DAT:
priv->dnld_sent = DNLD_CMD_SENT;
if_cs_send_data(priv, buf, nb);
ret = 0;
break;
case MVMS_CMD:
ret = if_cs_send_cmd(priv, buf, nb);
break;
default:
lbs_pr_err("%s: unsupported type %d\n", __FUNCTION__, type);
}
lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
return ret;
}
static int if_cs_get_int_status(wlan_private *priv, u8 *ireg)
{
struct if_cs_card *card = (struct if_cs_card *)priv->card;
//wlan_adapter *adapter = priv->adapter;
int ret = 0;
u16 int_cause;
u8 *cmdbuf;
*ireg = 0;
lbs_deb_enter(LBS_DEB_CS);
if (priv->adapter->surpriseremoved)
goto out;
int_cause = if_cs_read16(card, IF_CS_C_INT_CAUSE) & IF_CS_C_IC_MASK;
if_cs_write16(card, IF_CS_C_INT_CAUSE, int_cause);
*ireg = if_cs_read16(card, IF_CS_C_STATUS) & IF_CS_C_S_MASK;
if_cs_enable_ints(card);
if (!*ireg)
goto sbi_get_int_status_exit;
sbi_get_int_status_exit:
/* is there a data packet for us? */
if (*ireg & IF_CS_C_S_RX_UPLD_RDY) {
struct sk_buff *skb = if_cs_receive_data(priv);
libertas_process_rxed_packet(priv, skb);
*ireg &= ~IF_CS_C_S_RX_UPLD_RDY;
}
if (*ireg & IF_CS_C_S_TX_DNLD_RDY) {
priv->dnld_sent = DNLD_RES_RECEIVED;
}
/* Card has a command result for us */
if (*ireg & IF_CS_C_S_CMD_UPLD_RDY) {
spin_lock(&priv->adapter->driver_lock);
if (!priv->adapter->cur_cmd) {
cmdbuf = priv->upld_buf;
priv->adapter->hisregcpy &= ~IF_CS_C_S_RX_UPLD_RDY;
} else {
cmdbuf = priv->adapter->cur_cmd->bufvirtualaddr;
}
ret = if_cs_receive_cmdres(priv, cmdbuf, &priv->upld_len);
spin_unlock(&priv->adapter->driver_lock);
if (ret < 0)
lbs_pr_err("could not receive cmd from card\n");
}
out:
lbs_deb_leave_args(LBS_DEB_CS, "ret %d, ireg 0x%x, hisregcpy 0x%x", ret, *ireg, priv->adapter->hisregcpy);
return ret;
}
static int if_cs_read_event_cause(wlan_private *priv)
{
lbs_deb_enter(LBS_DEB_CS);
priv->adapter->eventcause = (if_cs_read16(priv->card, IF_CS_C_STATUS) & IF_CS_C_S_STATUS_MASK) >> 5;
if_cs_write16(priv->card, IF_CS_H_INT_CAUSE, IF_CS_H_IC_HOST_EVENT);
return 0;
}
/********************************************************************/
/* Card Services */
/********************************************************************/
/*
* After a card is removed, if_cs_release() will unregister the
* device, and release the PCMCIA configuration. If the device is
* still open, this will be postponed until it is closed.
*/
static void if_cs_release(struct pcmcia_device *p_dev)
{
struct if_cs_card *card = p_dev->priv;
lbs_deb_enter(LBS_DEB_CS);
pcmcia_disable_device(p_dev);
free_irq(p_dev->irq.AssignedIRQ, card);
if (card->iobase)
ioport_unmap(card->iobase);
lbs_deb_leave(LBS_DEB_CS);
}
/*
* This creates an "instance" of the driver, allocating local data
* structures for one device. The device is registered with Card
* Services.
*
* The dev_link structure is initialized, but we don't actually
* configure the card at this point -- we wait until we receive a card
* insertion event.
*/
static int if_cs_probe(struct pcmcia_device *p_dev)
{
int ret = -ENOMEM;
wlan_private *priv;
struct if_cs_card *card;
/* CIS parsing */
tuple_t tuple;
cisparse_t parse;
cistpl_cftable_entry_t *cfg = &parse.cftable_entry;
cistpl_io_t *io = &cfg->io;
u_char buf[64];
lbs_deb_enter(LBS_DEB_CS);
card = kzalloc(sizeof(struct if_cs_card), GFP_KERNEL);
if (!card) {
lbs_pr_err("error in kzalloc\n");
goto out;
}
card->p_dev = p_dev;
p_dev->priv = card;
p_dev->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING;
p_dev->irq.Handler = NULL;
p_dev->irq.IRQInfo1 = IRQ_INFO2_VALID | IRQ_LEVEL_ID;
p_dev->conf.Attributes = 0;
p_dev->conf.IntType = INT_MEMORY_AND_IO;
tuple.Attributes = 0;
tuple.TupleData = buf;
tuple.TupleDataMax = sizeof(buf);
tuple.TupleOffset = 0;
tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
if ((ret = pcmcia_get_first_tuple(p_dev, &tuple)) != 0 ||
(ret = pcmcia_get_tuple_data(p_dev, &tuple)) != 0 ||
(ret = pcmcia_parse_tuple(p_dev, &tuple, &parse)) != 0)
{
lbs_pr_err("error in pcmcia_get_first_tuple etc\n");
goto out1;
}
p_dev->conf.ConfigIndex = cfg->index;
/* Do we need to allocate an interrupt? */
if (cfg->irq.IRQInfo1) {
p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
}
/* IO window settings */
if (cfg->io.nwin != 1) {
lbs_pr_err("wrong CIS (check number of IO windows)\n");
ret = -ENODEV;
goto out1;
}
p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
p_dev->io.BasePort1 = io->win[0].base;
p_dev->io.NumPorts1 = io->win[0].len;
/* This reserves IO space but doesn't actually enable it */
ret = pcmcia_request_io(p_dev, &p_dev->io);
if (ret) {
lbs_pr_err("error in pcmcia_request_io\n");
goto out1;
}
/*
* Allocate an interrupt line. Note that this does not assign
* a handler to the interrupt, unless the 'Handler' member of
* the irq structure is initialized.
*/
if (p_dev->conf.Attributes & CONF_ENABLE_IRQ) {
ret = pcmcia_request_irq(p_dev, &p_dev->irq);
if (ret) {
lbs_pr_err("error in pcmcia_request_irq\n");
goto out1;
}
}
/* Initialize io access */
card->iobase = ioport_map(p_dev->io.BasePort1, p_dev->io.NumPorts1);
if (!card->iobase) {
lbs_pr_err("error in ioport_map\n");
ret = -EIO;
goto out1;
}
/*
* This actually configures the PCMCIA socket -- setting up
* the I/O windows and the interrupt mapping, and putting the
* card and host interface into "Memory and IO" mode.
*/
ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
if (ret) {
lbs_pr_err("error in pcmcia_request_configuration\n");
goto out2;
}
/* Finally, report what we've done */
lbs_deb_cs("irq %d, io 0x%04x-0x%04x\n",
p_dev->irq.AssignedIRQ, p_dev->io.BasePort1,
p_dev->io.BasePort1 + p_dev->io.NumPorts1 - 1);
if_cs_enable_ints(card);
/* Load the firmware early, before calling into libertas.ko */
ret = if_cs_prog_helper(card);
if (ret == 0)
ret = if_cs_prog_real(card);
if (ret)
goto out2;
/* Make this card known to the libertas driver */
priv = libertas_add_card(card, &p_dev->dev);
if (!priv) {
ret = -ENOMEM;
goto out2;
}
/* Store pointers to our call-back functions */
priv->card = card;
priv->hw_register_dev = if_cs_register_dev;
priv->hw_unregister_dev = if_cs_unregister_dev;
priv->hw_prog_firmware = if_cs_prog_firmware;
priv->hw_host_to_card = if_cs_host_to_card;
priv->hw_get_int_status = if_cs_get_int_status;
priv->hw_read_event_cause = if_cs_read_event_cause;
/* Now actually get the IRQ */
ret = request_irq(p_dev->irq.AssignedIRQ, if_cs_interrupt,
IRQF_SHARED, DRV_NAME, card);
if (ret) {
lbs_pr_err("error in request_irq\n");
goto out3;
}
/* And finally bring the card up */
if (libertas_activate_card(priv) != 0) {
lbs_pr_err("could not activate card\n");
goto out3;
}
ret = 0;
goto out;
out3:
libertas_remove_card(priv);
out2:
ioport_unmap(card->iobase);
out1:
pcmcia_disable_device(p_dev);
out:
lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
return ret;
}
/*
* This deletes a driver "instance". The device is de-registered with
* Card Services. If it has been released, all local data structures
* are freed. Otherwise, the structures will be freed when the device
* is released.
*/
static void if_cs_detach(struct pcmcia_device *p_dev)
{
struct if_cs_card *card = p_dev->priv;
lbs_deb_enter(LBS_DEB_CS);
libertas_remove_card(card->priv);
if_cs_release(p_dev);
kfree(card);
lbs_deb_leave(LBS_DEB_CS);
}
/********************************************************************/
/* Module initialization */
/********************************************************************/
static struct pcmcia_device_id if_cs_ids[] = {
PCMCIA_DEVICE_MANF_CARD(0x02df, 0x8103),
PCMCIA_DEVICE_NULL,
};
MODULE_DEVICE_TABLE(pcmcia, if_cs_ids);
static struct pcmcia_driver libertas_driver = {
.owner = THIS_MODULE,
.drv = {
.name = DRV_NAME,
},
.probe = if_cs_probe,
.remove = if_cs_detach,
.id_table = if_cs_ids,
};
static int __init if_cs_init(void)
{
int ret;
lbs_deb_enter(LBS_DEB_CS);
ret = pcmcia_register_driver(&libertas_driver);
lbs_deb_leave(LBS_DEB_CS);
return ret;
}
static void __exit if_cs_exit(void)
{
lbs_deb_enter(LBS_DEB_CS);
pcmcia_unregister_driver(&libertas_driver);
lbs_deb_leave(LBS_DEB_CS);
}
module_init(if_cs_init);
module_exit(if_cs_exit);
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