[PATCH] add support for Marvell 8385 CF cards
Holger Schurig
hs4233 at mail.mn-solutions.de
Tue Jul 3 04:16:18 EDT 2007
From: Holger Schurig <hs4233 at mail.mn-solutions.de>
This patch adds support for Marvell based 8385 compact flash cards.
Signed-off-by: Holger Schurig <hs4233 at mail.mn-solutions.de>
---
Please review and, if ok, apply as 2.6.23 material.
This driver seems to work reasonably well, but given that it
is my first WLAN driver, it might contain still errors, e.g. in
the area of locking or handling of PCMCIA.
One problem that I know off, but don't know how to handle it,
is the following. After booting and inserting the card, I
see this NOHZ-warning:
pccard: PCMCIA card inserted into slot 0
cs: memory probe 0x0c0000-0x0fffff: excluding 0xc0000-0xcffff 0xe0000-0xfffff
cs: memory probe 0x50000000-0x57ffffff: excluding 0x50000000-0x57ffffff
cs: memory probe 0x60000000-0x60ffffff: excluding 0x60000000-0x60ffffff
cs: memory probe 0xa0000000-0xa0ffffff: clean.
cs: memory probe 0xffd00000-0xffdfffff: excluding 0xffd00000-0xffd0ffff 0xffdf0000-0xffdfffff
pcmcia: registering new device pcmcia0.0
libertas: unidentified region code; using the default (USA)
libertas: eth1: Marvell WLAN 802.11 adapter
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
NOHZ: local_softirq_pending 08
However, the card works. "pccardctl eject; sleep 0.5; rmmod libertas_cs
libertas" removes the card and the driver. But another insertion of the
card (either manual or via "pccardctl insert" won't show the NOHZ-warning
again (and the card works again, of course).
The IRQ in use is heavily shared on my laptop:
laptop:~# cat /proc/interrupts
CPU0
0: 54139 XT-PIC-XT timer
1: 78 XT-PIC-XT i8042
2: 0 XT-PIC-XT cascade
8: 0 XT-PIC-XT rtc0
9: 2940 XT-PIC-XT acpi, Intel 82801DB-ICH4, eth0
11: 144 XT-PIC-XT yenta, yenta, ehci_hcd:usb1, uhci_hcd:usb2, uhci_hcd:usb3, uhci_hcd:usb4, libertas_cs
12: 9 XT-PIC-XT i8042
14: 1397 XT-PIC-XT ide0
15: 38 XT-PIC-XT ide1
NMI: 98
LOC: 1165
ERR: 0
MIS: 0
drivers/net/wireless/Kconfig | 7 +
drivers/net/wireless/Makefile | 2 +-
drivers/net/wireless/libertas/Makefile | 2 +
drivers/net/wireless/libertas/if_cs.c | 1005 ++++++++++++++++++++++++++++++++
4 files changed, 1015 insertions(+), 1 deletions(-)
create mode 100644 drivers/net/wireless/libertas/if_cs.c
diff --git a/drivers/net/wireless/Kconfig b/drivers/net/wireless/Kconfig
index fa2399c..5cdb693 100644
--- a/drivers/net/wireless/Kconfig
+++ b/drivers/net/wireless/Kconfig
@@ -280,6 +280,13 @@ config LIBERTAS_USB
---help---
A driver for Marvell Libertas 8388 USB devices.
+config LIBERTAS_CS
+ tristate "Marvell Libertas 8385 CompactFlash 802.11b/g cards"
+ depends on LIBERTAS && PCMCIA && EXPERIMENTAL
+ select FW_LOADER
+ ---help---
+ A driver for Marvell Libertas 8385 CompactFlash devices.
+
config LIBERTAS_DEBUG
bool "Enable full debugging output in the Libertas module."
depends on LIBERTAS
diff --git a/drivers/net/wireless/Makefile b/drivers/net/wireless/Makefile
index d212460..6b82b96 100644
--- a/drivers/net/wireless/Makefile
+++ b/drivers/net/wireless/Makefile
@@ -43,4 +43,4 @@ obj-$(CONFIG_PCMCIA_RAYCS) += ray_cs.o
obj-$(CONFIG_PCMCIA_WL3501) += wl3501_cs.o
obj-$(CONFIG_USB_ZD1201) += zd1201.o
-obj-$(CONFIG_LIBERTAS_USB) += libertas/
+obj-$(CONFIG_LIBERTAS) += libertas/
diff --git a/drivers/net/wireless/libertas/Makefile b/drivers/net/wireless/libertas/Makefile
index b56b4c5..c469d56 100644
--- a/drivers/net/wireless/libertas/Makefile
+++ b/drivers/net/wireless/libertas/Makefile
@@ -6,6 +6,8 @@ libertas-objs := main.o wext.o \
ethtool.o assoc.o
usb8xxx-objs += if_usb.o
+libertas_cs-objs += if_cs.o
obj-$(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..888f023
--- /dev/null
+++ b/drivers/net/wireless/libertas/if_cs.c
@@ -0,0 +1,1005 @@
+/*
+
+ Driver for the Marvell 8385 based compact flash WLAN cards.
+
+ (C) 2007 by Holger Schurig <hs4233 at 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 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 */
+/********************************************************************/
+
+/* 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);
--
1.5.2.1
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