--- /dev/null
+/*
+
+ Driver for the Marvell 8385 based compact flash WLAN cards.
+
+ (C) 2007 by Holger Schurig <hs4233@mail.mn-solutions.de>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; see the file COPYING. If not, write to
+ the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
+ Boston, MA 02110-1301, USA.
+
+*/
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/moduleparam.h>
+#include <linux/firmware.h>
+#include <linux/netdevice.h>
+
+#include <pcmcia/cistpl.h>
+#include <pcmcia/ds.h>
+
+#include <linux/io.h>
+
+#define DRV_NAME "libertas_cs"
+
+#include "decl.h"
+#include "defs.h"
+#include "dev.h"
+
+
+/********************************************************************/
+/* Module stuff */
+/********************************************************************/
+
+MODULE_AUTHOR("Holger Schurig <hs4233@mail.mn-solutions.de>");
+MODULE_DESCRIPTION("Driver for Marvell 83xx compact flash WLAN cards");
+MODULE_LICENSE("GPL");
+
+
+
+/********************************************************************/
+/* Data structures */
+/********************************************************************/
+
+struct if_cs_card {
+ struct pcmcia_device *p_dev;
+ struct lbs_private *priv;
+ void __iomem *iobase;
+ bool align_regs;
+ u32 model;
+};
+
+
+enum {
+ MODEL_UNKNOWN = 0x00,
+ MODEL_8305 = 0x01,
+ MODEL_8381 = 0x02,
+ MODEL_8385 = 0x03
+};
+
+static const struct lbs_fw_table fw_table[] = {
+ { MODEL_8305, "libertas/cf8305.bin", NULL },
+ { MODEL_8305, "libertas_cs_helper.fw", NULL },
+ { MODEL_8381, "libertas/cf8381_helper.bin", "libertas/cf8381.bin" },
+ { MODEL_8381, "libertas_cs_helper.fw", "libertas_cs.fw" },
+ { MODEL_8385, "libertas/cf8385_helper.bin", "libertas/cf8385.bin" },
+ { MODEL_8385, "libertas_cs_helper.fw", "libertas_cs.fw" },
+ { 0, NULL, NULL }
+};
+MODULE_FIRMWARE("libertas/cf8305.bin");
+MODULE_FIRMWARE("libertas/cf8381_helper.bin");
+MODULE_FIRMWARE("libertas/cf8381.bin");
+MODULE_FIRMWARE("libertas/cf8385_helper.bin");
+MODULE_FIRMWARE("libertas/cf8385.bin");
+MODULE_FIRMWARE("libertas_cs_helper.fw");
+MODULE_FIRMWARE("libertas_cs.fw");
+
+
+/********************************************************************/
+/* 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,
+ const 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 < 100000; i++) {
+ u8 val = if_cs_read8(card, addr);
+ if (val == reg)
+ return 0;
+ udelay(5);
+ }
+ return -ETIME;
+}
+
+
+
+/*
+ * First the bitmasks for the host/card interrupt/status registers:
+ */
+#define IF_CS_BIT_TX 0x0001
+#define IF_CS_BIT_RX 0x0002
+#define IF_CS_BIT_COMMAND 0x0004
+#define IF_CS_BIT_RESP 0x0008
+#define IF_CS_BIT_EVENT 0x0010
+#define IF_CS_BIT_MASK 0x001f
+
+
+
+/*
+ * It's not really clear to me what the host status register is for. It
+ * needs to be set almost in union with "host int cause". The following
+ * bits from above are used:
+ *
+ * IF_CS_BIT_TX driver downloaded a data packet
+ * IF_CS_BIT_RX driver got a data packet
+ * IF_CS_BIT_COMMAND driver downloaded a command
+ * IF_CS_BIT_RESP not used (has some meaning with powerdown)
+ * IF_CS_BIT_EVENT driver read a host event
+ */
+#define IF_CS_HOST_STATUS 0x00000000
+
+/*
+ * With the host int cause register can the host (that is, Linux) cause
+ * an interrupt in the firmware, to tell the firmware about those events:
+ *
+ * IF_CS_BIT_TX a data packet has been downloaded
+ * IF_CS_BIT_RX a received data packet has retrieved
+ * IF_CS_BIT_COMMAND a firmware block or a command has been downloaded
+ * IF_CS_BIT_RESP not used (has some meaning with powerdown)
+ * IF_CS_BIT_EVENT a host event (link lost etc) has been retrieved
+ */
+#define IF_CS_HOST_INT_CAUSE 0x00000002
+
+/*
+ * The host int mask register is used to enable/disable interrupt. However,
+ * I have the suspicion that disabled interrupts are lost.
+ */
+#define IF_CS_HOST_INT_MASK 0x00000004
+
+/*
+ * Used to send or receive data packets:
+ */
+#define IF_CS_WRITE 0x00000016
+#define IF_CS_WRITE_LEN 0x00000014
+#define IF_CS_READ 0x00000010
+#define IF_CS_READ_LEN 0x00000024
+
+/*
+ * Used to send commands (and to send firmware block) and to
+ * receive command responses:
+ */
+#define IF_CS_CMD 0x0000001A
+#define IF_CS_CMD_LEN 0x00000018
+#define IF_CS_RESP 0x00000012
+#define IF_CS_RESP_LEN 0x00000030
+
+/*
+ * The card status registers shows what the card/firmware actually
+ * accepts:
+ *
+ * IF_CS_BIT_TX you may send a data packet
+ * IF_CS_BIT_RX you may retrieve a data packet
+ * IF_CS_BIT_COMMAND you may send a command
+ * IF_CS_BIT_RESP you may retrieve a command response
+ * IF_CS_BIT_EVENT the card has a event for use (link lost, snr low etc)
+ *
+ * When reading this register several times, you will get back the same
+ * results --- with one exception: the IF_CS_BIT_EVENT clear itself
+ * automatically.
+ *
+ * Not that we don't rely on BIT_RX,_BIT_RESP or BIT_EVENT because
+ * we handle this via the card int cause register.
+ */
+#define IF_CS_CARD_STATUS 0x00000020
+#define IF_CS_CARD_STATUS_MASK 0x7f00
+
+/*
+ * The card int cause register is used by the card/firmware to notify us
+ * about the following events:
+ *
+ * IF_CS_BIT_TX a data packet has successfully been sentx
+ * IF_CS_BIT_RX a data packet has been received and can be retrieved
+ * IF_CS_BIT_COMMAND not used
+ * IF_CS_BIT_RESP the firmware has a command response for us
+ * IF_CS_BIT_EVENT the card has a event for use (link lost, snr low etc)
+ */
+#define IF_CS_CARD_INT_CAUSE 0x00000022
+
+/*
+ * This is used to for handshaking with the card's bootloader/helper image
+ * to synchronize downloading of firmware blocks.
+ */
+#define IF_CS_SQ_READ_LOW 0x00000028
+#define IF_CS_SQ_HELPER_OK 0x10
+
+/*
+ * The scratch register tells us ...
+ *
+ * IF_CS_SCRATCH_BOOT_OK the bootloader runs
+ * IF_CS_SCRATCH_HELPER_OK the helper firmware already runs
+ */
+#define IF_CS_SCRATCH 0x0000003F
+#define IF_CS_SCRATCH_BOOT_OK 0x00
+#define IF_CS_SCRATCH_HELPER_OK 0x5a
+
+/*
+ * Used to detect ancient chips:
+ */
+#define IF_CS_PRODUCT_ID 0x0000001C
+#define IF_CS_CF8385_B1_REV 0x12
+#define IF_CS_CF8381_B3_REV 0x04
+#define IF_CS_CF8305_B1_REV 0x03
+
+/*
+ * Used to detect other cards than CF8385 since their revisions of silicon
+ * doesn't match those from CF8385, eg. CF8381 B3 works with this driver.
+ */
+#define CF8305_MANFID 0x02db
+#define CF8305_CARDID 0x8103
+#define CF8381_MANFID 0x02db
+#define CF8381_CARDID 0x6064
+#define CF8385_MANFID 0x02df
+#define CF8385_CARDID 0x8103
+
+/*
+ * FIXME: just use the 'driver_info' field of 'struct pcmcia_device_id' when
+ * that gets fixed. Currently there's no way to access it from the probe hook.
+ */
+static inline u32 get_model(u16 manf_id, u16 card_id)
+{
+ /* NOTE: keep in sync with if_cs_ids */
+ if (manf_id == CF8305_MANFID && card_id == CF8305_CARDID)
+ return MODEL_8305;
+ else if (manf_id == CF8381_MANFID && card_id == CF8381_CARDID)
+ return MODEL_8381;
+ else if (manf_id == CF8385_MANFID && card_id == CF8385_CARDID)
+ return MODEL_8385;
+ return MODEL_UNKNOWN;
+}
+
+/********************************************************************/
+/* I/O and interrupt handling */
+/********************************************************************/
+
+static inline void if_cs_enable_ints(struct if_cs_card *card)
+{
+ lbs_deb_enter(LBS_DEB_CS);
+ if_cs_write16(card, IF_CS_HOST_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_HOST_INT_MASK, IF_CS_BIT_MASK);
+}
+
+/*
+ * Called from if_cs_host_to_card to send a command to the hardware
+ */
+static int if_cs_send_cmd(struct lbs_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);
+ if_cs_disable_ints(card);
+
+ /* Is hardware ready? */
+ while (1) {
+ u16 status = if_cs_read16(card, IF_CS_CARD_STATUS);
+ if (status & IF_CS_BIT_COMMAND)
+ break;
+ if (++loops > 100) {
+ netdev_err(priv->dev, "card not ready for commands\n");
+ goto done;
+ }
+ mdelay(1);
+ }
+
+ if_cs_write16(card, IF_CS_CMD_LEN, nb);
+
+ if_cs_write16_rep(card, IF_CS_CMD, buf, nb / 2);
+ /* Are we supposed to transfer an odd amount of bytes? */
+ if (nb & 1)
+ if_cs_write8(card, IF_CS_CMD, buf[nb-1]);
+
+ /* "Assert the download over interrupt command in the Host
+ * status register" */
+ if_cs_write16(card, IF_CS_HOST_STATUS, IF_CS_BIT_COMMAND);
+
+ /* "Assert the download over interrupt command in the Card
+ * interrupt case register" */
+ if_cs_write16(card, IF_CS_HOST_INT_CAUSE, IF_CS_BIT_COMMAND);
+ ret = 0;
+
+done:
+ if_cs_enable_ints(card);
+ 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(struct lbs_private *priv, u8 *buf, u16 nb)
+{
+ struct if_cs_card *card = (struct if_cs_card *)priv->card;
+ u16 status;
+
+ lbs_deb_enter(LBS_DEB_CS);
+ if_cs_disable_ints(card);
+
+ status = if_cs_read16(card, IF_CS_CARD_STATUS);
+ BUG_ON((status & IF_CS_BIT_TX) == 0);
+
+ if_cs_write16(card, IF_CS_WRITE_LEN, nb);
+
+ /* write even number of bytes, then odd byte if necessary */
+ if_cs_write16_rep(card, IF_CS_WRITE, buf, nb / 2);
+ if (nb & 1)
+ if_cs_write8(card, IF_CS_WRITE, buf[nb-1]);
+
+ if_cs_write16(card, IF_CS_HOST_STATUS, IF_CS_BIT_TX);
+ if_cs_write16(card, IF_CS_HOST_INT_CAUSE, IF_CS_BIT_TX);
+ if_cs_enable_ints(card);
+
+ lbs_deb_leave(LBS_DEB_CS);
+}
+
+/*
+ * Get the command result out of the card.
+ */
+static int if_cs_receive_cmdres(struct lbs_private *priv, u8 *data, u32 *len)
+{
+ unsigned long flags;
+ int ret = -1;
+ u16 status;
+
+ lbs_deb_enter(LBS_DEB_CS);
+
+ /* is hardware ready? */
+ status = if_cs_read16(priv->card, IF_CS_CARD_STATUS);
+ if ((status & IF_CS_BIT_RESP) == 0) {
+ netdev_err(priv->dev, "no cmd response in card\n");
+ *len = 0;
+ goto out;
+ }
+
+ *len = if_cs_read16(priv->card, IF_CS_RESP_LEN);
+ if ((*len == 0) || (*len > LBS_CMD_BUFFER_SIZE)) {
+ netdev_err(priv->dev,
+ "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_RESP, data, *len/sizeof(u16));
+ if (*len & 1)
+ data[*len-1] = if_cs_read8(priv->card, IF_CS_RESP);
+
+ /* This is a workaround for a firmware that reports too much
+ * bytes */
+ *len -= 8;
+ ret = 0;
+
+ /* Clear this flag again */
+ spin_lock_irqsave(&priv->driver_lock, flags);
+ priv->dnld_sent = DNLD_RES_RECEIVED;
+ spin_unlock_irqrestore(&priv->driver_lock, flags);
+
+out:
+ lbs_deb_leave_args(LBS_DEB_CS, "ret %d, len %d", ret, *len);
+ return ret;
+}
+
+static struct sk_buff *if_cs_receive_data(struct lbs_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_READ_LEN);
+ if (len == 0 || len > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) {
+ netdev_err(priv->dev,
+ "card data buffer has invalid # of bytes (%d)\n",
+ len);
+ priv->dev->stats.rx_dropped++;
+ goto dat_err;
+ }
+
+ skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + 2);
+ if (!skb)
+ goto out;
+ skb_put(skb, len);
+ skb_reserve(skb, 2);/* 16 byte align */
+ data = skb->data;
+
+ /* read even number of bytes, then odd byte if necessary */
+ if_cs_read16_rep(priv->card, IF_CS_READ, data, len/sizeof(u16));
+ if (len & 1)
+ data[len-1] = if_cs_read8(priv->card, IF_CS_READ);
+
+dat_err:
+ if_cs_write16(priv->card, IF_CS_HOST_STATUS, IF_CS_BIT_RX);
+ if_cs_write16(priv->card, IF_CS_HOST_INT_CAUSE, IF_CS_BIT_RX);
+
+out:
+ lbs_deb_leave_args(LBS_DEB_CS, "ret %p", skb);
+ return skb;
+}
+
+static irqreturn_t if_cs_interrupt(int irq, void *data)
+{
+ struct if_cs_card *card = data;
+ struct lbs_private *priv = card->priv;
+ u16 cause;
+
+ lbs_deb_enter(LBS_DEB_CS);
+
+ /* Ask card interrupt cause register if there is something for us */
+ cause = if_cs_read16(card, IF_CS_CARD_INT_CAUSE);
+ lbs_deb_cs("cause 0x%04x\n", cause);
+
+ if (cause == 0) {
+ /* Not for us */
+ return IRQ_NONE;
+ }
+
+ if (cause == 0xffff) {
+ /* Read in junk, the card has probably been removed */
+ card->priv->surpriseremoved = 1;
+ return IRQ_HANDLED;
+ }
+
+ if (cause & IF_CS_BIT_RX) {
+ struct sk_buff *skb;
+ lbs_deb_cs("rx packet\n");
+ skb = if_cs_receive_data(priv);
+ if (skb)
+ lbs_process_rxed_packet(priv, skb);
+ }
+
+ if (cause & IF_CS_BIT_TX) {
+ lbs_deb_cs("tx done\n");
+ lbs_host_to_card_done(priv);
+ }
+
+ if (cause & IF_CS_BIT_RESP) {
+ unsigned long flags;
+ u8 i;
+
+ lbs_deb_cs("cmd resp\n");
+ spin_lock_irqsave(&priv->driver_lock, flags);
+ i = (priv->resp_idx == 0) ? 1 : 0;
+ spin_unlock_irqrestore(&priv->driver_lock, flags);
+
+ BUG_ON(priv->resp_len[i]);
+ if_cs_receive_cmdres(priv, priv->resp_buf[i],
+ &priv->resp_len[i]);
+
+ spin_lock_irqsave(&priv->driver_lock, flags);
+ lbs_notify_command_response(priv, i);
+ spin_unlock_irqrestore(&priv->driver_lock, flags);
+ }
+
+ if (cause & IF_CS_BIT_EVENT) {
+ u16 status = if_cs_read16(priv->card, IF_CS_CARD_STATUS);
+ if_cs_write16(priv->card, IF_CS_HOST_INT_CAUSE,
+ IF_CS_BIT_EVENT);
+ lbs_queue_event(priv, (status & IF_CS_CARD_STATUS_MASK) >> 8);
+ }
+
+ /* Clear interrupt cause */
+ if_cs_write16(card, IF_CS_CARD_INT_CAUSE, cause & IF_CS_BIT_MASK);
+
+ lbs_deb_leave(LBS_DEB_CS);
+ return IRQ_HANDLED;
+}
+
+
+
+
+/********************************************************************/
+/* Firmware */
+/********************************************************************/
+
+/*
+ * Tries to program the helper firmware.
+ *
+ * Return 0 on success
+ */
+static int if_cs_prog_helper(struct if_cs_card *card, const struct firmware *fw)
+{
+ int ret = 0;
+ int sent = 0;
+ u8 scratch;
+
+ lbs_deb_enter(LBS_DEB_CS);
+
+ /*
+ * This is the only place where an unaligned register access happens on
+ * the CF8305 card, therefore for the sake of speed of the driver, we do
+ * the alignment correction here.
+ */
+ if (card->align_regs)
+ scratch = if_cs_read16(card, IF_CS_SCRATCH) >> 8;
+ else
+ scratch = if_cs_read8(card, IF_CS_SCRATCH);
+
+ /* "If the value is 0x5a, the firmware is already
+ * downloaded successfully"
+ */
+ if (scratch == IF_CS_SCRATCH_HELPER_OK)
+ goto done;
+
+ /* "If the value is != 00, it is invalid value of register */
+ if (scratch != IF_CS_SCRATCH_BOOT_OK) {
+ ret = -ENODEV;
+ goto done;
+ }
+
+ lbs_deb_cs("helper size %td\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;
+
+ /*
+ * "write the number of bytes to be sent to the I/O Command
+ * write length register"
+ */
+ if_cs_write16(card, IF_CS_CMD_LEN, count);
+
+ /* "write this to I/O Command port register as 16 bit writes */
+ if (count)
+ if_cs_write16_rep(card, IF_CS_CMD,
+ &fw->data[sent],
+ count >> 1);
+
+ /*
+ * "Assert the download over interrupt command in the Host
+ * status register"
+ */
+ if_cs_write8(card, IF_CS_HOST_STATUS, IF_CS_BIT_COMMAND);
+
+ /*
+ * "Assert the download over interrupt command in the Card
+ * interrupt case register"
+ */
+ if_cs_write16(card, IF_CS_HOST_INT_CAUSE, IF_CS_BIT_COMMAND);
+
+ /*
+ * "The host polls the Card Status register ... for 50 ms before
+ * declaring a failure"
+ */
+ ret = if_cs_poll_while_fw_download(card, IF_CS_CARD_STATUS,
+ IF_CS_BIT_COMMAND);
+ if (ret < 0) {
+ pr_err("can't download helper at 0x%x, ret %d\n",
+ sent, ret);
+ goto done;
+ }
+
+ if (count == 0)
+ break;
+
+ sent += count;
+ }
+
+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);
+
+ lbs_deb_cs("fw size %td\n", fw->size);
+
+ ret = if_cs_poll_while_fw_download(card, IF_CS_SQ_READ_LOW,
+ IF_CS_SQ_HELPER_OK);
+ if (ret < 0) {
+ pr_err("helper firmware doesn't answer\n");
+ goto done;
+ }
+
+ for (sent = 0; sent < fw->size; sent += len) {
+ len = if_cs_read16(card, IF_CS_SQ_READ_LOW);
+ if (len & 1) {
+ retry++;
+ pr_info("odd, need to retry this firmware block\n");
+ } else {
+ retry = 0;
+ }
+
+ if (retry > 20) {
+ pr_err("could not download firmware\n");
+ ret = -ENODEV;
+ goto done;
+ }
+ if (retry) {
+ sent -= len;
+ }
+
+
+ if_cs_write16(card, IF_CS_CMD_LEN, len);
+
+ if_cs_write16_rep(card, IF_CS_CMD,
+ &fw->data[sent],
+ (len+1) >> 1);
+ if_cs_write8(card, IF_CS_HOST_STATUS, IF_CS_BIT_COMMAND);
+ if_cs_write16(card, IF_CS_HOST_INT_CAUSE, IF_CS_BIT_COMMAND);
+
+ ret = if_cs_poll_while_fw_download(card, IF_CS_CARD_STATUS,
+ IF_CS_BIT_COMMAND);
+ if (ret < 0) {
+ pr_err("can't download firmware at 0x%x\n", sent);
+ goto done;
+ }
+ }
+
+ ret = if_cs_poll_while_fw_download(card, IF_CS_SCRATCH, 0x5a);
+ if (ret < 0)
+ pr_err("firmware download failed\n");
+
+done:
+ lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
+ return ret;
+}
+
+static void if_cs_prog_firmware(struct lbs_private *priv, int ret,
+ const struct firmware *helper,
+ const struct firmware *mainfw)
+{
+ struct if_cs_card *card = priv->card;
+
+ if (ret) {
+ pr_err("failed to find firmware (%d)\n", ret);
+ return;
+ }
+
+ /* Load the firmware */
+ ret = if_cs_prog_helper(card, helper);
+ if (ret == 0 && (card->model != MODEL_8305))
+ ret = if_cs_prog_real(card, mainfw);
+ if (ret)
+ return;
+
+ /* Now actually get the IRQ */
+ ret = request_irq(card->p_dev->irq, if_cs_interrupt,
+ IRQF_SHARED, DRV_NAME, card);
+ if (ret) {
+ pr_err("error in request_irq\n");
+ return;
+ }
+
+ /*
+ * Clear any interrupt cause that happened while sending
+ * firmware/initializing card
+ */
+ if_cs_write16(card, IF_CS_CARD_INT_CAUSE, IF_CS_BIT_MASK);
+ if_cs_enable_ints(card);
+
+ /* And finally bring the card up */
+ priv->fw_ready = 1;
+ if (lbs_start_card(priv) != 0) {
+ pr_err("could not activate card\n");
+ free_irq(card->p_dev->irq, card);
+ }
+}
+
+
+/********************************************************************/
+/* Callback functions for libertas.ko */
+/********************************************************************/
+
+/* Send commands or data packets to the card */
+static int if_cs_host_to_card(struct lbs_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_DATA_SENT;
+ if_cs_send_data(priv, buf, nb);
+ ret = 0;
+ break;
+ case MVMS_CMD:
+ priv->dnld_sent = DNLD_CMD_SENT;
+ ret = if_cs_send_cmd(priv, buf, nb);
+ break;
+ default:
+ netdev_err(priv->dev, "%s: unsupported type %d\n",
+ __func__, type);
+ }
+
+ lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
+ return ret;
+}
+
+
+static void if_cs_release(struct pcmcia_device *p_dev)
+{
+ struct if_cs_card *card = p_dev->priv;
+
+ lbs_deb_enter(LBS_DEB_CS);
+
+ free_irq(p_dev->irq, card);
+ pcmcia_disable_device(p_dev);
+ if (card->iobase)
+ ioport_unmap(card->iobase);
+
+ lbs_deb_leave(LBS_DEB_CS);
+}
+
+
+static int if_cs_ioprobe(struct pcmcia_device *p_dev, void *priv_data)
+{
+ p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
+ p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
+
+ if (p_dev->resource[1]->end) {
+ pr_err("wrong CIS (check number of IO windows)\n");
+ return -ENODEV;
+ }
+
+ /* This reserves IO space but doesn't actually enable it */
+ return pcmcia_request_io(p_dev);
+}
+
+static int if_cs_probe(struct pcmcia_device *p_dev)
+{
+ int ret = -ENOMEM;
+ unsigned int prod_id;
+ struct lbs_private *priv;
+ struct if_cs_card *card;
+
+ lbs_deb_enter(LBS_DEB_CS);
+
+ card = kzalloc(sizeof(struct if_cs_card), GFP_KERNEL);
+ if (!card)
+ goto out;
+
+ card->p_dev = p_dev;
+ p_dev->priv = card;
+
+ p_dev->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
+
+ if (pcmcia_loop_config(p_dev, if_cs_ioprobe, NULL)) {
+ pr_err("error in pcmcia_loop_config\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->irq)
+ goto out1;
+
+ /* Initialize io access */
+ card->iobase = ioport_map(p_dev->resource[0]->start,
+ resource_size(p_dev->resource[0]));
+ if (!card->iobase) {
+ pr_err("error in ioport_map\n");
+ ret = -EIO;
+ goto out1;
+ }
+
+ ret = pcmcia_enable_device(p_dev);
+ if (ret) {
+ pr_err("error in pcmcia_enable_device\n");
+ goto out2;
+ }
+
+ /* Finally, report what we've done */
+ lbs_deb_cs("irq %d, io %pR", p_dev->irq, p_dev->resource[0]);
+
+ /*
+ * Most of the libertas cards can do unaligned register access, but some
+ * weird ones cannot. That's especially true for the CF8305 card.
+ */
+ card->align_regs = false;
+
+ card->model = get_model(p_dev->manf_id, p_dev->card_id);
+ if (card->model == MODEL_UNKNOWN) {
+ pr_err("unsupported manf_id 0x%04x / card_id 0x%04x\n",
+ p_dev->manf_id, p_dev->card_id);
+ ret = -ENODEV;
+ goto out2;
+ }
+
+ /* Check if we have a current silicon */
+ prod_id = if_cs_read8(card, IF_CS_PRODUCT_ID);
+ if (card->model == MODEL_8305) {
+ card->align_regs = true;
+ if (prod_id < IF_CS_CF8305_B1_REV) {
+ pr_err("8305 rev B0 and older are not supported\n");
+ ret = -ENODEV;
+ goto out2;
+ }
+ }
+
+ if ((card->model == MODEL_8381) && prod_id < IF_CS_CF8381_B3_REV) {
+ pr_err("8381 rev B2 and older are not supported\n");
+ ret = -ENODEV;
+ goto out2;
+ }
+
+ if ((card->model == MODEL_8385) && prod_id < IF_CS_CF8385_B1_REV) {
+ pr_err("8385 rev B0 and older are not supported\n");
+ ret = -ENODEV;
+ goto out2;
+ }
+
+ /* Make this card known to the libertas driver */
+ priv = lbs_add_card(card, &p_dev->dev);
+ if (!priv) {
+ ret = -ENOMEM;
+ goto out2;
+ }
+
+ /* Set up fields in lbs_private */
+ card->priv = priv;
+ priv->card = card;
+ priv->hw_host_to_card = if_cs_host_to_card;
+ priv->enter_deep_sleep = NULL;
+ priv->exit_deep_sleep = NULL;
+ priv->reset_deep_sleep_wakeup = NULL;
+
+ /* Get firmware */
+ ret = lbs_get_firmware_async(priv, &p_dev->dev, card->model, fw_table,
+ if_cs_prog_firmware);
+ if (ret) {
+ pr_err("failed to find firmware (%d)\n", ret);
+ goto out3;
+ }
+
+ goto out;
+
+out3:
+ lbs_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;
+}
+
+
+static void if_cs_detach(struct pcmcia_device *p_dev)
+{
+ struct if_cs_card *card = p_dev->priv;
+
+ lbs_deb_enter(LBS_DEB_CS);
+
+ lbs_stop_card(card->priv);
+ lbs_remove_card(card->priv);
+ if_cs_disable_ints(card);
+ if_cs_release(p_dev);
+ kfree(card);
+
+ lbs_deb_leave(LBS_DEB_CS);
+}
+
+
+
+/********************************************************************/
+/* Module initialization */
+/********************************************************************/
+
+static const struct pcmcia_device_id if_cs_ids[] = {
+ PCMCIA_DEVICE_MANF_CARD(CF8305_MANFID, CF8305_CARDID),
+ PCMCIA_DEVICE_MANF_CARD(CF8381_MANFID, CF8381_CARDID),
+ PCMCIA_DEVICE_MANF_CARD(CF8385_MANFID, CF8385_CARDID),
+ /* NOTE: keep in sync with get_model() */
+ PCMCIA_DEVICE_NULL,
+};
+MODULE_DEVICE_TABLE(pcmcia, if_cs_ids);
+
+static struct pcmcia_driver lbs_driver = {
+ .owner = THIS_MODULE,
+ .name = DRV_NAME,
+ .probe = if_cs_probe,
+ .remove = if_cs_detach,
+ .id_table = if_cs_ids,
+};
+module_pcmcia_driver(lbs_driver);
Code Review / kvmfornfv.git / blobdiff