[PATCH 2/3] [WIP] libertas: add support for 8385 CompactFlash cards
Holger Schurig
hs4233 at mail.mn-solutions.de
Tue Jun 19 11:50:59 EDT 2007
From: Holger Schurig <hs4233 at mail.mn-solutions.de>
From: Holger Schurig <hs4233 at mail.mn-solutions.de>
This patch is work-in-progress and known to have some deficiensies. Do not
apply for upstream, but test and report and errors back.
---
drivers/net/wireless/libertas/Makefile | 2
drivers/net/wireless/libertas/if_cs.c | 1000 ++++++++++++++++++++++++++++++++
2 files changed, 1002 insertions(+), 0 deletions(-)
diff --git a/drivers/net/wireless/libertas/Makefile b/drivers/net/wireless/libertas/Makefile
index b56b4c5..c469d56 100644
--- a/drivers/net/wireless/libertas/Makefile
+++ b/drivers/net/wireless/libertas/Makefile
@@ -6,6 +6,8 @@ libertas-objs := main.o wext.o \
ethtool.o assoc.o
usb8xxx-objs += if_usb.o
+libertas_cs-objs += if_cs.o
obj-$(CONFIG_LIBERTAS) += libertas.o
obj-$(CONFIG_LIBERTAS_USB) += usb8xxx.o
+obj-$(CONFIG_LIBERTAS_CS) += libertas_cs.o
diff --git a/drivers/net/wireless/libertas/if_cs.c b/drivers/net/wireless/libertas/if_cs.c
new file mode 100644
index 0000000..37d0a76
--- /dev/null
+++ b/drivers/net/wireless/libertas/if_cs.c
@@ -0,0 +1,1000 @@
+/*
+ * (C) 2007 by Holger Schurig <hs4233 at mail.mn-solutions.de>
+ *
+ * Copyright notice & release notes in file LICENSE
+ *
+ * There are some VERY important things to do before this thingy works:
+ *
+ * - fix all items marked as TODO
+ *
+ */
+
+#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 at 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 */
+/********************************************************************/
+
+#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<(%ld bytes)\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>(%ld bytes)\n",
+ reg, count);
+ iowrite16_rep(card->iobase + reg, buf, count);
+}
+
+
+static int if_cs_poll_reg(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 0x01
+#define IF_CS_H_STATUS_RX_OVER 0x02
+#define IF_CS_H_STATUS_DNLD_OVER 0x04
+
+#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
+/* The following 5 definitions should be the same as the MRVDRV_ ones */
+#define IF_CS_C_STATUS_TX_DNLD_RDY 0x0001
+#define IF_CS_C_STATUS_RX_UPLD_RDY 0x0002
+#define IF_CS_C_STATUS_CMD_DNLD_RDY 0x0004
+#define IF_CS_C_STATUS_CMD_UPLD_RDY 0x0008
+#define IF_CS_C_STATUS_CARDEVENT 0x0010
+#define IC_CS_C_STATUS_EVENTCAUSE_MASK 0x7f00
+
+#if MRVDRV_CMD_DNLD_RDY != IF_CS_C_STATUS_CMD_DNLD_RDY
+#error MRVDRV_CMD_DNLD_RDY and IF_CS_C_STATUS_CMD_DNLD_RDY not in sync
+#endif
+#if MRVDRV_CMD_UPLD_RDY != IF_CS_C_STATUS_CMD_UPLD_RDY
+#error MRVDRV_CMD_UPLD_RDY and IF_CS_C_STATUS_CMD_UPLD_RDY not in sync
+#endif
+#if MRVDRV_CARDEVENT != IF_CS_C_STATUS_CARDEVENT
+#error MRVDRV_CARDEVENT and IF_CS_C_STATUS_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 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 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 */
+ int_cause &= IF_CS_C_IC_MASK;
+ if_cs_write16(card, IF_CS_C_INT_CAUSE, int_cause);
+ 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_STATUS_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" */
+ wmb();
+ 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);
+ wmb();
+ 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_STATUS_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" */
+ wmb();
+ 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_reg(card, IF_CS_C_STATUS,
+ IF_CS_C_STATUS_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_reg(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_reg(card, IF_CS_C_STATUS,
+ IF_CS_C_STATUS_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_reg(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;
+
+ /* TODO: used for suspend/resume */
+ /* card->eth_dev = priv->dev; */
+
+ 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,
+ * there's no need to send a RESET command like in if_usb.c
+ */
+
+ return 0;
+}
+
+
+static int if_cs_prog_firmware(wlan_private *priv)
+{
+ struct if_cs_card *card = (struct if_cs_card *)priv->card;
+ int ret;
+
+ lbs_deb_enter(LBS_DEB_CS);
+
+ ret = if_cs_prog_helper(card);
+ if (ret)
+ lbs_pr_err("could not download firmware\n");
+ else
+ ret = if_cs_prog_real(card);
+#ifdef DEBUG_IO
+ debug_output = 1;
+#endif
+ if (ret==0)
+ priv->adapter->fw_ready = 1;
+
+ lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
+ return ret;
+}
+
+
+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);
+
+ int_cause = if_cs_read16(card, IF_CS_C_STATUS) & IF_CS_C_IC_MASK;
+ if_cs_enable_ints(card);
+
+ if (!int_cause)
+ goto sbi_get_int_status_exit;
+
+ *ireg = int_cause & (IF_CS_C_STATUS_TX_DNLD_RDY |
+ IF_CS_C_STATUS_RX_UPLD_RDY |
+ IF_CS_C_STATUS_CMD_DNLD_RDY |
+ IF_CS_C_STATUS_CMD_UPLD_RDY |
+ IF_CS_C_STATUS_CARDEVENT);
+
+sbi_get_int_status_exit:
+
+ /* is there a data packet for us? */
+ if (int_cause & IF_CS_C_STATUS_RX_UPLD_RDY) {
+ struct sk_buff *skb = if_cs_receive_data(priv);
+ libertas_process_rxed_packet(priv, skb);
+ *ireg &= ~IF_CS_C_STATUS_RX_UPLD_RDY;
+ }
+
+ if (int_cause & IF_CS_C_STATUS_TX_DNLD_RDY) {
+ priv->dnld_sent = DNLD_RES_RECEIVED;
+ }
+
+ if (int_cause & IF_CS_C_STATUS_CMD_UPLD_RDY) {
+ spin_lock(&priv->adapter->driver_lock);
+ if (!priv->adapter->cur_cmd) {
+ cmdbuf = priv->upld_buf;
+ priv->adapter->hisregcpy &= ~IF_CS_C_STATUS_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 send to host\n");
+ goto out;
+ }
+ }
+
+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) & IC_CS_C_STATUS_EVENTCAUSE_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);
+
+#ifdef TODO
+ /* We're committed to taking the device away now, so mark the
+ * hardware as unavailable */
+ spin_lock_irqsave(&priv->lock, flags);
+ priv->hw_unavailable++;
+ spin_unlock_irqrestore(&priv->lock, flags);
+#endif
+
+ 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);
+
+ /* 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;
+ }
+
+ /* This brings 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;
+
+ libertas_debug = 0
+ | LBS_DEB_ENTER
+ | LBS_DEB_LEAVE
+ | LBS_DEB_HEX
+ | LBS_DEB_MAIN
+ | LBS_DEB_WEXT
+ | LBS_DEB_ASSOC
+ | LBS_DEB_JOIN
+ | LBS_DEB_CMD
+ | LBS_DEB_FW
+ | LBS_DEB_SCAN
+ | LBS_DEB_CS;
+
+ 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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