* (at your option) any later version.
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/hardirq.h>
+#include <linux/interrupt.h>
#include <linux/moduleparam.h>
#include <linux/firmware.h>
#include <linux/jiffies.h>
/* Handles all SPI communication (except for FW load) */
struct workqueue_struct *workqueue;
struct work_struct packet_work;
+ struct work_struct resume_work;
u8 cmd_buffer[IF_SPI_CMD_BUF_SIZE];
/* Protects cmd_packet_list and data_packet_list */
spinlock_t buffer_lock;
+
+ /* True is card suspended */
+ u8 suspended;
};
static void free_if_spi_card(struct if_spi_card *card)
card->prev_xfer_time = jiffies;
}
-/* Write out a byte buffer to an SPI register,
- * using a series of 16-bit transfers. */
+/*
+ * Write out a byte buffer to an SPI register,
+ * using a series of 16-bit transfers.
+ */
static int spu_write(struct if_spi_card *card, u16 reg, const u8 *buf, int len)
{
int err = 0;
struct spi_transfer dummy_trans;
struct spi_transfer data_trans;
- /* You must take an even number of bytes from the SPU, even if you
- * don't care about the last one. */
+ /*
+ * You must take an even number of bytes from the SPU, even if you
+ * don't care about the last one.
+ */
BUG_ON(len & 0x1);
spu_transaction_init(card);
return ret;
}
-/* Read 32 bits from an SPI register.
- * The low 16 bits are read first. */
+/*
+ * Read 32 bits from an SPI register.
+ * The low 16 bits are read first.
+ */
static int spu_read_u32(struct if_spi_card *card, u16 reg, u32 *val)
{
__le32 buf;
return err;
}
-/* Keep reading 16 bits from an SPI register until you get the correct result.
+/*
+ * Keep reading 16 bits from an SPI register until you get the correct result.
*
* If mask = 0, the correct result is any non-zero number.
* If mask != 0, the correct result is any number where
* number & target_mask == target
*
- * Returns -ETIMEDOUT if a second passes without the correct result. */
+ * Returns -ETIMEDOUT if a second passes without the correct result.
+ */
static int spu_wait_for_u16(struct if_spi_card *card, u16 reg,
u16 target_mask, u16 target)
{
}
udelay(100);
if (time_after(jiffies, timeout)) {
- lbs_pr_err("%s: timeout with val=%02x, "
- "target_mask=%02x, target=%02x\n",
+ pr_err("%s: timeout with val=%02x, target_mask=%02x, target=%02x\n",
__func__, val, target_mask, target);
return -ETIMEDOUT;
}
}
}
-/* Read 16 bits from an SPI register until you receive a specific value.
- * Returns -ETIMEDOUT if a 4 tries pass without success. */
+/*
+ * Read 16 bits from an SPI register until you receive a specific value.
+ * Returns -ETIMEDOUT if a 4 tries pass without success.
+ */
static int spu_wait_for_u32(struct if_spi_card *card, u32 reg, u32 target)
{
int err, try;
{
int err = 0;
- /* We can suppress a host interrupt by clearing the appropriate
- * bit in the "host interrupt status mask" register */
+ /*
+ * We can suppress a host interrupt by clearing the appropriate
+ * bit in the "host interrupt status mask" register
+ */
if (suppress_host_int) {
err = spu_write_u16(card, IF_SPI_HOST_INT_STATUS_MASK_REG, 0);
if (err)
return err;
}
- /* If auto-interrupts are on, the completion of certain transactions
+ /*
+ * If auto-interrupts are on, the completion of certain transactions
* will trigger an interrupt automatically. If auto-interrupts
* are off, we need to set the "Card Interrupt Cause" register to
- * trigger a card interrupt. */
+ * trigger a card interrupt.
+ */
if (auto_int) {
err = spu_write_u16(card, IF_SPI_HOST_INT_CTRL_REG,
IF_SPI_HICT_TX_DOWNLOAD_OVER_AUTO |
if (err)
return err;
if ((rval & 0xF) != mode) {
- lbs_pr_err("Can't read bus mode register.\n");
+ pr_err("Can't read bus mode register\n");
return -EIO;
}
return 0;
int err = 0;
u32 delay;
- /* We have to start up in timed delay mode so that we can safely
- * read the Delay Read Register. */
+ /*
+ * We have to start up in timed delay mode so that we can safely
+ * read the Delay Read Register.
+ */
card->use_dummy_writes = 0;
err = spu_set_bus_mode(card,
IF_SPI_BUS_MODE_SPI_CLOCK_PHASE_RISING |
/* Load helper firmware image */
while (bytes_remaining > 0) {
- /* Scratch pad 1 should contain the number of bytes we
- * want to download to the firmware */
+ /*
+ * Scratch pad 1 should contain the number of bytes we
+ * want to download to the firmware
+ */
err = spu_write_u16(card, IF_SPI_SCRATCH_1_REG,
HELPER_FW_LOAD_CHUNK_SZ);
if (err)
if (err)
goto out;
- /* Feed the data into the command read/write port reg
- * in chunks of 64 bytes */
+ /*
+ * Feed the data into the command read/write port reg
+ * in chunks of 64 bytes
+ */
memset(temp, 0, sizeof(temp));
memcpy(temp, fw,
min(bytes_remaining, HELPER_FW_LOAD_CHUNK_SZ));
fw += HELPER_FW_LOAD_CHUNK_SZ;
}
- /* Once the helper / single stage firmware download is complete,
+ /*
+ * Once the helper / single stage firmware download is complete,
* write 0 to scratch pad 1 and interrupt the
- * bootloader. This completes the helper download. */
+ * bootloader. This completes the helper download.
+ */
err = spu_write_u16(card, IF_SPI_SCRATCH_1_REG, FIRMWARE_DNLD_OK);
if (err)
goto out;
out:
if (err)
- lbs_pr_err("failed to load helper firmware (err=%d)\n", err);
+ pr_err("failed to load helper firmware (err=%d)\n", err);
lbs_deb_leave_args(LBS_DEB_SPI, "err %d", err);
return err;
}
-/* Returns the length of the next packet the firmware expects us to send
- * Sets crc_err if the previous transfer had a CRC error. */
+/*
+ * Returns the length of the next packet the firmware expects us to send.
+ * Sets crc_err if the previous transfer had a CRC error.
+ */
static int if_spi_prog_main_firmware_check_len(struct if_spi_card *card,
int *crc_err)
{
u16 len;
int err = 0;
- /* wait until the host interrupt status register indicates
- * that we are ready to download */
+ /*
+ * wait until the host interrupt status register indicates
+ * that we are ready to download
+ */
err = spu_wait_for_u16(card, IF_SPI_HOST_INT_STATUS_REG,
IF_SPI_HIST_CMD_DOWNLOAD_RDY,
IF_SPI_HIST_CMD_DOWNLOAD_RDY);
if (err) {
- lbs_pr_err("timed out waiting for host_int_status\n");
+ pr_err("timed out waiting for host_int_status\n");
return err;
}
return err;
if (len > IF_SPI_CMD_BUF_SIZE) {
- lbs_pr_err("firmware load device requested a larger "
- "tranfer than we are prepared to "
- "handle. (len = %d)\n", len);
+ pr_err("firmware load device requested a larger transfer than we are prepared to handle (len = %d)\n",
+ len);
return -EIO;
}
if (len & 0x1) {
static int if_spi_prog_main_firmware(struct if_spi_card *card,
const struct firmware *firmware)
{
+ struct lbs_private *priv = card->priv;
int len, prev_len;
int bytes, crc_err = 0, err = 0;
const u8 *fw;
err = spu_wait_for_u16(card, IF_SPI_SCRATCH_1_REG, 0, 0);
if (err) {
- lbs_pr_err("%s: timed out waiting for initial "
- "scratch reg = 0\n", __func__);
+ netdev_err(priv->dev,
+ "%s: timed out waiting for initial scratch reg = 0\n",
+ __func__);
goto out;
}
goto out;
}
if (bytes < 0) {
- /* If there are no more bytes left, we would normally
- * expect to have terminated with len = 0 */
- lbs_pr_err("Firmware load wants more bytes "
- "than we have to offer.\n");
+ /*
+ * If there are no more bytes left, we would normally
+ * expect to have terminated with len = 0
+ */
+ netdev_err(priv->dev,
+ "Firmware load wants more bytes than we have to offer.\n");
break;
}
if (crc_err) {
/* Previous transfer failed. */
if (++num_crc_errs > MAX_MAIN_FW_LOAD_CRC_ERR) {
- lbs_pr_err("Too many CRC errors encountered "
- "in firmware load.\n");
+ pr_err("Too many CRC errors encountered in firmware load.\n");
err = -EIO;
goto out;
}
prev_len = len;
}
if (bytes > prev_len) {
- lbs_pr_err("firmware load wants fewer bytes than "
- "we have to offer.\n");
+ pr_err("firmware load wants fewer bytes than we have to offer\n");
}
/* Confirm firmware download */
err = spu_wait_for_u32(card, IF_SPI_SCRATCH_4_REG,
SUCCESSFUL_FW_DOWNLOAD_MAGIC);
if (err) {
- lbs_pr_err("failed to confirm the firmware download\n");
+ pr_err("failed to confirm the firmware download\n");
goto out;
}
out:
if (err)
- lbs_pr_err("failed to load firmware (err=%d)\n", err);
+ pr_err("failed to load firmware (err=%d)\n", err);
lbs_deb_leave_args(LBS_DEB_SPI, "err %d", err);
return err;
}
u16 len;
u8 i;
- /* We need a buffer big enough to handle whatever people send to
- * hw_host_to_card */
+ /*
+ * We need a buffer big enough to handle whatever people send to
+ * hw_host_to_card
+ */
BUILD_BUG_ON(IF_SPI_CMD_BUF_SIZE < LBS_CMD_BUFFER_SIZE);
BUILD_BUG_ON(IF_SPI_CMD_BUF_SIZE < LBS_UPLD_SIZE);
- /* It's just annoying if the buffer size isn't a multiple of 4, because
- * then we might have len < IF_SPI_CMD_BUF_SIZE but
- * ALIGN(len, 4) > IF_SPI_CMD_BUF_SIZE */
+ /*
+ * It's just annoying if the buffer size isn't a multiple of 4, because
+ * then we might have len < IF_SPI_CMD_BUF_SIZE but
+ * ALIGN(len, 4) > IF_SPI_CMD_BUF_SIZE
+ */
BUILD_BUG_ON(IF_SPI_CMD_BUF_SIZE % 4 != 0);
lbs_deb_enter(LBS_DEB_SPI);
if (err)
goto out;
if (!len) {
- lbs_pr_err("%s: error: card has no data for host\n",
+ netdev_err(priv->dev, "%s: error: card has no data for host\n",
__func__);
err = -EINVAL;
goto out;
} else if (len > IF_SPI_CMD_BUF_SIZE) {
- lbs_pr_err("%s: error: response packet too large: "
- "%d bytes, but maximum is %d\n",
+ netdev_err(priv->dev,
+ "%s: error: response packet too large: %d bytes, but maximum is %d\n",
__func__, len, IF_SPI_CMD_BUF_SIZE);
err = -EINVAL;
goto out;
out:
if (err)
- lbs_pr_err("%s: err=%d\n", __func__, err);
+ netdev_err(priv->dev, "%s: err=%d\n", __func__, err);
lbs_deb_leave(LBS_DEB_SPI);
return err;
}
/* Move data from the card to the host */
static int if_spi_c2h_data(struct if_spi_card *card)
{
+ struct lbs_private *priv = card->priv;
struct sk_buff *skb;
char *data;
u16 len;
if (err)
goto out;
if (!len) {
- lbs_pr_err("%s: error: card has no data for host\n",
+ netdev_err(priv->dev, "%s: error: card has no data for host\n",
__func__);
err = -EINVAL;
goto out;
} else if (len > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) {
- lbs_pr_err("%s: error: card has %d bytes of data, but "
- "our maximum skb size is %zu\n",
+ netdev_err(priv->dev,
+ "%s: error: card has %d bytes of data, but our maximum skb size is %zu\n",
__func__, len, MRVDRV_ETH_RX_PACKET_BUFFER_SIZE);
err = -EINVAL;
goto out;
dev_kfree_skb(skb);
out:
if (err)
- lbs_pr_err("%s: err=%d\n", __func__, err);
+ netdev_err(priv->dev, "%s: err=%d\n", __func__, err);
lbs_deb_leave(LBS_DEB_SPI);
return err;
}
static void if_spi_h2c(struct if_spi_card *card,
struct if_spi_packet *packet, int type)
{
+ struct lbs_private *priv = card->priv;
int err = 0;
u16 int_type, port_reg;
port_reg = IF_SPI_CMD_RDWRPORT_REG;
break;
default:
- lbs_pr_err("can't transfer buffer of type %d\n", type);
+ netdev_err(priv->dev, "can't transfer buffer of type %d\n",
+ type);
err = -EINVAL;
goto out;
}
kfree(packet);
if (err)
- lbs_pr_err("%s: error %d\n", __func__, err);
+ netdev_err(priv->dev, "%s: error %d\n", __func__, err);
}
/* Inform the host about a card event */
lbs_queue_event(priv, cause & 0xff);
out:
if (err)
- lbs_pr_err("%s: error %d\n", __func__, err);
+ netdev_err(priv->dev, "%s: error %d\n", __func__, err);
}
static void if_spi_host_to_card_worker(struct work_struct *work)
u16 hiStatus;
unsigned long flags;
struct if_spi_packet *packet;
+ struct lbs_private *priv;
card = container_of(work, struct if_spi_card, packet_work);
+ priv = card->priv;
lbs_deb_enter(LBS_DEB_SPI);
- /* Read the host interrupt status register to see what we
- * can do. */
+ /*
+ * Read the host interrupt status register to see what we
+ * can do.
+ */
err = spu_read_u16(card, IF_SPI_HOST_INT_STATUS_REG,
&hiStatus);
if (err) {
- lbs_pr_err("I/O error\n");
+ netdev_err(priv->dev, "I/O error\n");
goto err;
}
goto err;
}
- /* workaround: in PS mode, the card does not set the Command
- * Download Ready bit, but it sets TX Download Ready. */
+ /*
+ * workaround: in PS mode, the card does not set the Command
+ * Download Ready bit, but it sets TX Download Ready.
+ */
if (hiStatus & IF_SPI_HIST_CMD_DOWNLOAD_RDY ||
(card->priv->psstate != PS_STATE_FULL_POWER &&
(hiStatus & IF_SPI_HIST_TX_DOWNLOAD_RDY))) {
- /* This means two things. First of all,
+ /*
+ * This means two things. First of all,
* if there was a previous command sent, the card has
* successfully received it.
* Secondly, it is now ready to download another
*/
lbs_host_to_card_done(card->priv);
- /* Do we have any command packets from the host to
- * send? */
+ /* Do we have any command packets from the host to send? */
packet = NULL;
spin_lock_irqsave(&card->buffer_lock, flags);
if (!list_empty(&card->cmd_packet_list)) {
if_spi_h2c(card, packet, MVMS_CMD);
}
if (hiStatus & IF_SPI_HIST_TX_DOWNLOAD_RDY) {
- /* Do we have any data packets from the host to
- * send? */
+ /* Do we have any data packets from the host to send? */
packet = NULL;
spin_lock_irqsave(&card->buffer_lock, flags);
if (!list_empty(&card->data_packet_list)) {
err:
if (err)
- lbs_pr_err("%s: got error %d\n", __func__, err);
+ netdev_err(priv->dev, "%s: got error %d\n", __func__, err);
lbs_deb_leave(LBS_DEB_SPI);
}
* Host to Card
*
* Called from Libertas to transfer some data to the WLAN device
- * We can't sleep here. */
+ * We can't sleep here.
+ */
static int if_spi_host_to_card(struct lbs_private *priv,
u8 type, u8 *buf, u16 nb)
{
lbs_deb_enter_args(LBS_DEB_SPI, "type %d, bytes %d", type, nb);
if (nb == 0) {
- lbs_pr_err("%s: invalid size requested: %d\n", __func__, nb);
+ netdev_err(priv->dev, "%s: invalid size requested: %d\n",
+ __func__, nb);
err = -EINVAL;
goto out;
}
spin_unlock_irqrestore(&card->buffer_lock, flags);
break;
default:
- lbs_pr_err("can't transfer buffer of type %d", type);
+ netdev_err(priv->dev, "can't transfer buffer of type %d\n",
+ type);
err = -EINVAL;
break;
}
static int if_spi_init_card(struct if_spi_card *card)
{
- struct spi_device *spi = card->spi;
+ struct lbs_private *priv = card->priv;
int err, i;
u32 scratch;
const struct firmware *helper = NULL;
break;
}
if (i == ARRAY_SIZE(fw_table)) {
- lbs_pr_err("Unsupported chip_id: 0x%02x\n",
- card->card_id);
+ netdev_err(priv->dev, "Unsupported chip_id: 0x%02x\n",
+ card->card_id);
err = -ENODEV;
goto out;
}
card->card_id, &fw_table[0], &helper,
&mainfw);
if (err) {
- lbs_pr_err("failed to find firmware (%d)\n", err);
+ netdev_err(priv->dev, "failed to find firmware (%d)\n",
+ err);
goto out;
}
"attached to SPI bus_num %d, chip_select %d. "
"spi->max_speed_hz=%d\n",
card->card_id, card->card_rev,
- spi->master->bus_num, spi->chip_select,
- spi->max_speed_hz);
+ card->spi->master->bus_num,
+ card->spi->chip_select,
+ card->spi->max_speed_hz);
err = if_spi_prog_helper_firmware(card, helper);
if (err)
goto out;
return err;
}
+static void if_spi_resume_worker(struct work_struct *work)
+{
+ struct if_spi_card *card;
+
+ card = container_of(work, struct if_spi_card, resume_work);
+
+ if (card->suspended) {
+ if (card->pdata->setup)
+ card->pdata->setup(card->spi);
+
+ /* Init card ... */
+ if_spi_init_card(card);
+
+ enable_irq(card->spi->irq);
+
+ /* And resume it ... */
+ lbs_resume(card->priv);
+
+ card->suspended = 0;
+ }
+}
+
static int __devinit if_spi_probe(struct spi_device *spi)
{
struct if_spi_card *card;
if (err)
goto free_card;
- /* Register our card with libertas.
- * This will call alloc_etherdev */
+ /*
+ * Register our card with libertas.
+ * This will call alloc_etherdev.
+ */
priv = lbs_add_card(card, &spi->dev);
if (!priv) {
err = -ENOMEM;
goto free_card;
}
card->priv = priv;
+ priv->setup_fw_on_resume = 1;
priv->card = card;
priv->hw_host_to_card = if_spi_host_to_card;
priv->enter_deep_sleep = NULL;
/* Initialize interrupt handling stuff. */
card->workqueue = create_workqueue("libertas_spi");
INIT_WORK(&card->packet_work, if_spi_host_to_card_worker);
+ INIT_WORK(&card->resume_work, if_spi_resume_worker);
err = request_irq(spi->irq, if_spi_host_interrupt,
IRQF_TRIGGER_FALLING, "libertas_spi", card);
if (err) {
- lbs_pr_err("can't get host irq line-- request_irq failed\n");
+ pr_err("can't get host irq line-- request_irq failed\n");
goto terminate_workqueue;
}
- /* Start the card.
+ /*
+ * Start the card.
* This will call register_netdev, and we'll start
- * getting interrupts... */
+ * getting interrupts...
+ */
err = lbs_start_card(priv);
if (err)
goto release_irq;
lbs_deb_spi("libertas_spi_remove\n");
lbs_deb_enter(LBS_DEB_SPI);
+ cancel_work_sync(&card->resume_work);
+
lbs_stop_card(priv);
lbs_remove_card(priv); /* will call free_netdev */
return 0;
}
+static int if_spi_suspend(struct device *dev)
+{
+ struct spi_device *spi = to_spi_device(dev);
+ struct if_spi_card *card = spi_get_drvdata(spi);
+
+ if (!card->suspended) {
+ lbs_suspend(card->priv);
+ flush_workqueue(card->workqueue);
+ disable_irq(spi->irq);
+
+ if (card->pdata->teardown)
+ card->pdata->teardown(spi);
+ card->suspended = 1;
+ }
+
+ return 0;
+}
+
+static int if_spi_resume(struct device *dev)
+{
+ struct spi_device *spi = to_spi_device(dev);
+ struct if_spi_card *card = spi_get_drvdata(spi);
+
+ /* Schedule delayed work */
+ schedule_work(&card->resume_work);
+
+ return 0;
+}
+
+static const struct dev_pm_ops if_spi_pm_ops = {
+ .suspend = if_spi_suspend,
+ .resume = if_spi_resume,
+};
+
static struct spi_driver libertas_spi_driver = {
.probe = if_spi_probe,
.remove = __devexit_p(libertas_spi_remove),
.name = "libertas_spi",
.bus = &spi_bus_type,
.owner = THIS_MODULE,
+ .pm = &if_spi_pm_ops,
},
};
git.openpandora.org / pandora-kernel.git / blobdiff