[PATCH] add support for Marvell 8385 CF cards
Dan Williams
dcbw at redhat.com
Tue Jul 3 10:55:24 EDT 2007
On Tue, 2007-07-03 at 10:16 +0200, Holger Schurig wrote:
> From: Holger Schurig <hs4233 at mail.mn-solutions.de>
>
> 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 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);
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