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Re: [PATCH] add support for Marvell 8385 CF cards

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On Tue, 2007-07-03 at 10:16 +0200, Holger Schurig wrote:
> From: Holger Schurig <hs4233@xxxxxxxxxxxxxxxxxxxx>
> 
> This patch adds support for Marvell based 8385 compact flash cards.

Do you intend this for libertas-2.6 or wireless-2.6?

Dan

> Signed-off-by: Holger Schurig <hs4233@xxxxxxxxxxxxxxxxxxxx>
> ---
> 
> 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@xxxxxxxxxxxxxxxxxxxx>
> +
> +  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@xxxxxxxxxxxxxxxxxxxx>");
> +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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