#include <linux/moduleparam.h>
#include <linux/firmware.h>
-#include <linux/gpio.h>
#include <linux/jiffies.h>
#include <linux/kthread.h>
#include <linux/list.h>
#include <linux/netdevice.h>
+#include <linux/semaphore.h>
#include <linux/spi/libertas_spi.h>
#include <linux/spi/spi.h>
#include "dev.h"
#include "if_spi.h"
-struct if_spi_packet {
- struct list_head list;
- u16 blen;
- u8 buffer[0] __attribute__((aligned(4)));
-};
-
struct if_spi_card {
struct spi_device *spi;
struct lbs_private *priv;
struct libertas_spi_platform_data *pdata;
- char helper_fw_name[FIRMWARE_NAME_MAX];
- char main_fw_name[FIRMWARE_NAME_MAX];
+ char helper_fw_name[IF_SPI_FW_NAME_MAX];
+ char main_fw_name[IF_SPI_FW_NAME_MAX];
/* The card ID and card revision, as reported by the hardware. */
u16 card_id;
u8 card_rev;
- /* Pin number for our GPIO chip-select. */
- /* TODO: Once the generic SPI layer has some additional features, we
- * should take this out and use the normal chip select here.
- * We need support for chip select delays, and not dropping chipselect
- * after each word. */
- int gpio_cs;
-
/* The last time that we initiated an SPU operation */
unsigned long prev_xfer_time;
struct semaphore spi_thread_terminated;
u8 cmd_buffer[IF_SPI_CMD_BUF_SIZE];
-
- /* A buffer of incoming packets from libertas core.
- * Since we can't sleep in hw_host_to_card, we have to buffer
- * them. */
- struct list_head cmd_packet_list;
- struct list_head data_packet_list;
-
- /* Protects cmd_packet_list and data_packet_list */
- spinlock_t buffer_lock;
};
static void free_if_spi_card(struct if_spi_card *card)
{
- struct list_head *cursor, *next;
- struct if_spi_packet *packet;
-
- BUG_ON(card->run_thread);
- list_for_each_safe(cursor, next, &card->cmd_packet_list) {
- packet = container_of(cursor, struct if_spi_packet, list);
- list_del(&packet->list);
- kfree(packet);
- }
- list_for_each_safe(cursor, next, &card->data_packet_list) {
- packet = container_of(cursor, struct if_spi_packet, list);
- list_del(&packet->list);
- kfree(packet);
- }
spi_set_drvdata(card->spi, NULL);
kfree(card);
}
* First we have to put a SPU register name on the bus. Then we can
* either read from or write to that register.
*
- * For 16-bit transactions, byte order on the bus is big-endian.
- * We don't have to worry about that here, though.
- * The translation takes place in the SPI routines.
*/
static void spu_transaction_init(struct if_spi_card *card)
* If not, we have to busy-wait to be on the safe side. */
ndelay(400);
}
- gpio_set_value(card->gpio_cs, 0); /* assert CS */
}
static void spu_transaction_finish(struct if_spi_card *card)
{
- gpio_set_value(card->gpio_cs, 1); /* drop CS */
card->prev_xfer_time = jiffies;
}
static int spu_write(struct if_spi_card *card, u16 reg, const u8 *buf, int len)
{
int err = 0;
- u16 reg_out = reg | IF_SPI_WRITE_OPERATION_MASK;
+ __le16 reg_out = cpu_to_le16(reg | IF_SPI_WRITE_OPERATION_MASK);
+ struct spi_message m;
+ struct spi_transfer reg_trans;
+ struct spi_transfer data_trans;
+
+ spi_message_init(&m);
+ memset(®_trans, 0, sizeof(reg_trans));
+ memset(&data_trans, 0, sizeof(data_trans));
/* You must give an even number of bytes to the SPU, even if it
* doesn't care about the last one. */
spu_transaction_init(card);
/* write SPU register index */
- err = spi_write(card->spi, (u8 *)®_out, sizeof(u16));
- if (err)
- goto out;
+ reg_trans.tx_buf = ®_out;
+ reg_trans.len = sizeof(reg_out);
- err = spi_write(card->spi, buf, len);
+ data_trans.tx_buf = buf;
+ data_trans.len = len;
-out:
+ spi_message_add_tail(®_trans, &m);
+ spi_message_add_tail(&data_trans, &m);
+
+ err = spi_sync(card->spi, &m);
spu_transaction_finish(card);
return err;
}
static inline int spu_write_u16(struct if_spi_card *card, u16 reg, u16 val)
{
- return spu_write(card, reg, (u8 *)&val, sizeof(u16));
-}
+ __le16 buff;
-static inline int spu_write_u32(struct if_spi_card *card, u16 reg, u32 val)
-{
- /* The lower 16 bits are written first. */
- u16 out[2];
- out[0] = val & 0xffff;
- out[1] = (val & 0xffff0000) >> 16;
- return spu_write(card, reg, (u8 *)&out, sizeof(u32));
+ buff = cpu_to_le16(val);
+ return spu_write(card, reg, (u8 *)&buff, sizeof(u16));
}
static inline int spu_reg_is_port_reg(u16 reg)
static int spu_read(struct if_spi_card *card, u16 reg, u8 *buf, int len)
{
- unsigned int i, delay;
+ unsigned int delay;
int err = 0;
- u16 zero = 0;
- u16 reg_out = reg | IF_SPI_READ_OPERATION_MASK;
+ __le16 reg_out = cpu_to_le16(reg | IF_SPI_READ_OPERATION_MASK);
+ struct spi_message m;
+ struct spi_transfer reg_trans;
+ 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. */
spu_transaction_init(card);
+ spi_message_init(&m);
+ memset(®_trans, 0, sizeof(reg_trans));
+ memset(&dummy_trans, 0, sizeof(dummy_trans));
+ memset(&data_trans, 0, sizeof(data_trans));
+
/* write SPU register index */
- err = spi_write(card->spi, (u8 *)®_out, sizeof(u16));
- if (err)
- goto out;
+ reg_trans.tx_buf = ®_out;
+ reg_trans.len = sizeof(reg_out);
+ spi_message_add_tail(®_trans, &m);
delay = spu_reg_is_port_reg(reg) ? card->spu_port_delay :
card->spu_reg_delay;
if (card->use_dummy_writes) {
/* Clock in dummy cycles while the SPU fills the FIFO */
- for (i = 0; i < delay / 16; ++i) {
- err = spi_write(card->spi, (u8 *)&zero, sizeof(u16));
- if (err)
- return err;
- }
+ dummy_trans.len = delay / 8;
+ spi_message_add_tail(&dummy_trans, &m);
} else {
/* Busy-wait while the SPU fills the FIFO */
- ndelay(100 + (delay * 10));
+ reg_trans.delay_usecs =
+ DIV_ROUND_UP((100 + (delay * 10)), 1000);
}
/* read in data */
- err = spi_read(card->spi, buf, len);
+ data_trans.rx_buf = buf;
+ data_trans.len = len;
+ spi_message_add_tail(&data_trans, &m);
-out:
+ err = spi_sync(card->spi, &m);
spu_transaction_finish(card);
return err;
}
/* Read 16 bits from an SPI register */
static inline int spu_read_u16(struct if_spi_card *card, u16 reg, u16 *val)
{
- return spu_read(card, reg, (u8 *)val, sizeof(u16));
+ __le16 buf;
+ int ret;
+
+ ret = spu_read(card, reg, (u8 *)&buf, sizeof(buf));
+ if (ret == 0)
+ *val = le16_to_cpup(&buf);
+ return ret;
}
/* 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)
{
- u16 buf[2];
+ __le32 buf;
int err;
- err = spu_read(card, reg, (u8 *)buf, sizeof(u32));
+
+ err = spu_read(card, reg, (u8 *)&buf, sizeof(buf));
if (!err)
- *val = buf[0] | (buf[1] << 16);
+ *val = le32_to_cpup(&buf);
return err;
}
err = spu_read_u16(card, IF_SPI_SPU_BUS_MODE_REG, &rval);
if (err)
return err;
- if (rval != mode) {
+ if ((rval & 0xF) != mode) {
lbs_pr_err("Can't read bus mode register.\n");
return -EIO;
}
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 %lu\n",
+ "our maximum skb size is %zu\n",
__func__, len, MRVDRV_ETH_RX_PACKET_BUFFER_SIZE);
err = -EINVAL;
goto out;
return err;
}
-/* Move data or a command from the host to the card. */
-static void if_spi_h2c(struct if_spi_card *card,
- struct if_spi_packet *packet, int type)
-{
- int err = 0;
- u16 int_type, port_reg;
-
- switch (type) {
- case MVMS_DAT:
- int_type = IF_SPI_CIC_TX_DOWNLOAD_OVER;
- port_reg = IF_SPI_DATA_RDWRPORT_REG;
- break;
- case MVMS_CMD:
- int_type = IF_SPI_CIC_CMD_DOWNLOAD_OVER;
- port_reg = IF_SPI_CMD_RDWRPORT_REG;
- break;
- default:
- lbs_pr_err("can't transfer buffer of type %d\n", type);
- err = -EINVAL;
- goto out;
- }
-
- /* Write the data to the card */
- err = spu_write(card, port_reg, packet->buffer, packet->blen);
- if (err)
- goto out;
-
-out:
- kfree(packet);
-
- if (err)
- lbs_pr_err("%s: error %d\n", __func__, err);
-}
-
/* Inform the host about a card event */
static void if_spi_e2h(struct if_spi_card *card)
{
int err = 0;
- unsigned long flags;
u32 cause;
struct lbs_private *priv = card->priv;
if (err)
goto out;
- spin_lock_irqsave(&priv->driver_lock, flags);
- lbs_queue_event(priv, cause & 0xff);
- spin_unlock_irqrestore(&priv->driver_lock, flags);
+ /* re-enable the card event interrupt */
+ spu_write_u16(card, IF_SPI_HOST_INT_STATUS_REG,
+ ~IF_SPI_HICU_CARD_EVENT);
+
+ /* generate a card interrupt */
+ spu_write_u16(card, IF_SPI_CARD_INT_CAUSE_REG, IF_SPI_CIC_HOST_EVENT);
+ lbs_queue_event(priv, cause & 0xff);
out:
if (err)
lbs_pr_err("%s: error %d\n", __func__, err);
int err;
struct if_spi_card *card = data;
u16 hiStatus;
- unsigned long flags;
- struct if_spi_packet *packet;
while (1) {
/* Wait to be woken up by one of two things. First, our ISR
err = if_spi_c2h_data(card);
if (err)
goto err;
- if (hiStatus & IF_SPI_HIST_CMD_DOWNLOAD_RDY) {
- /* 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
- * command.
- */
- lbs_host_to_card_done(card->priv);
- /* 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)) {
- packet = (struct if_spi_packet *)(card->
- cmd_packet_list.next);
- list_del(&packet->list);
- }
- spin_unlock_irqrestore(&card->buffer_lock, flags);
-
- if (packet)
- if_spi_h2c(card, packet, MVMS_CMD);
+ /* 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))) {
+ lbs_host_to_card_done(card->priv);
}
- if (hiStatus & IF_SPI_HIST_TX_DOWNLOAD_RDY) {
- /* 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)) {
- packet = (struct if_spi_packet *)(card->
- data_packet_list.next);
- list_del(&packet->list);
- }
- spin_unlock_irqrestore(&card->buffer_lock, flags);
- if (packet)
- if_spi_h2c(card, packet, MVMS_DAT);
- }
if (hiStatus & IF_SPI_HIST_CARD_EVENT)
if_spi_e2h(card);
u8 type, u8 *buf, u16 nb)
{
int err = 0;
- unsigned long flags;
struct if_spi_card *card = priv->card;
- struct if_spi_packet *packet;
- u16 blen;
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);
- err = -EINVAL;
- goto out;
- }
- blen = ALIGN(nb, 4);
- packet = kzalloc(sizeof(struct if_spi_packet) + blen, GFP_ATOMIC);
- if (!packet) {
- err = -ENOMEM;
- goto out;
- }
- packet->blen = blen;
- memcpy(packet->buffer, buf, nb);
- memset(packet->buffer + nb, 0, blen - nb);
+ nb = ALIGN(nb, 4);
switch (type) {
case MVMS_CMD:
- priv->dnld_sent = DNLD_CMD_SENT;
- spin_lock_irqsave(&card->buffer_lock, flags);
- list_add_tail(&packet->list, &card->cmd_packet_list);
- spin_unlock_irqrestore(&card->buffer_lock, flags);
+ err = spu_write(card, IF_SPI_CMD_RDWRPORT_REG, buf, nb);
break;
case MVMS_DAT:
- priv->dnld_sent = DNLD_DATA_SENT;
- spin_lock_irqsave(&card->buffer_lock, flags);
- list_add_tail(&packet->list, &card->data_packet_list);
- spin_unlock_irqrestore(&card->buffer_lock, flags);
+ err = spu_write(card, IF_SPI_DATA_RDWRPORT_REG, buf, nb);
break;
default:
lbs_pr_err("can't transfer buffer of type %d", type);
break;
}
- /* Wake up the spi thread */
- up(&card->spi_ready);
-out:
lbs_deb_leave_args(LBS_DEB_SPI, "err=%d", err);
return err;
}
lbs_pr_err("Unsupported chip_id: 0x%02x\n", card_id);
return -EAFNOSUPPORT;
}
- snprintf(helper_fw, FIRMWARE_NAME_MAX, "libertas/gspi%d_hlp.bin",
+ snprintf(helper_fw, IF_SPI_FW_NAME_MAX, "libertas/gspi%d_hlp.bin",
chip_id_to_device_name[i].name);
- snprintf(main_fw, FIRMWARE_NAME_MAX, "libertas/gspi%d.bin",
+ snprintf(main_fw, IF_SPI_FW_NAME_MAX, "libertas/gspi%d.bin",
chip_id_to_device_name[i].name);
return 0;
}
+MODULE_FIRMWARE("libertas/gspi8385_hlp.bin");
+MODULE_FIRMWARE("libertas/gspi8385.bin");
+MODULE_FIRMWARE("libertas/gspi8686_hlp.bin");
+MODULE_FIRMWARE("libertas/gspi8686.bin");
static int __devinit if_spi_probe(struct spi_device *spi)
{
spi_set_drvdata(spi, card);
card->pdata = pdata;
card->spi = spi;
- card->gpio_cs = pdata->gpio_cs;
card->prev_xfer_time = jiffies;
sema_init(&card->spi_ready, 0);
sema_init(&card->spi_thread_terminated, 0);
- INIT_LIST_HEAD(&card->cmd_packet_list);
- INIT_LIST_HEAD(&card->data_packet_list);
- spin_lock_init(&card->buffer_lock);
-
- /* set up GPIO CS line. TODO: use regular CS line */
- err = gpio_request(card->gpio_cs, "if_spi_gpio_chip_select");
- if (err)
- goto free_card;
- err = gpio_direction_output(card->gpio_cs, 1);
- if (err)
- goto free_gpio;
/* Initialize the SPI Interface Unit */
err = spu_init(card, pdata->use_dummy_writes);
if (err)
- goto free_gpio;
+ goto free_card;
err = spu_get_chip_revision(card, &card->card_id, &card->card_rev);
if (err)
- goto free_gpio;
+ goto free_card;
/* Firmware load */
err = spu_read_u32(card, IF_SPI_SCRATCH_4_REG, &scratch);
if (err)
- goto free_gpio;
+ goto free_card;
if (scratch == SUCCESSFUL_FW_DOWNLOAD_MAGIC)
lbs_deb_spi("Firmware is already loaded for "
"Marvell WLAN 802.11 adapter\n");
err = if_spi_calculate_fw_names(card->card_id,
card->helper_fw_name, card->main_fw_name);
if (err)
- goto free_gpio;
+ goto free_card;
lbs_deb_spi("Initializing FW for Marvell WLAN 802.11 adapter "
"(chip_id = 0x%04x, chip_rev = 0x%02x) "
spi->max_speed_hz);
err = if_spi_prog_helper_firmware(card);
if (err)
- goto free_gpio;
+ goto free_card;
err = if_spi_prog_main_firmware(card);
if (err)
- goto free_gpio;
+ goto free_card;
lbs_deb_spi("loaded FW for Marvell WLAN 802.11 adapter\n");
}
err = spu_set_interrupt_mode(card, 0, 1);
if (err)
- goto free_gpio;
+ goto free_card;
/* Register our card with libertas.
* This will call alloc_etherdev */
priv = lbs_add_card(card, &spi->dev);
if (!priv) {
err = -ENOMEM;
- goto free_gpio;
+ goto free_card;
}
card->priv = priv;
priv->card = card;
priv->hw_host_to_card = if_spi_host_to_card;
+ priv->enter_deep_sleep = NULL;
+ priv->exit_deep_sleep = NULL;
+ priv->reset_deep_sleep_wakeup = NULL;
priv->fw_ready = 1;
- priv->ps_supported = 1;
/* Initialize interrupt handling stuff. */
card->run_thread = 1;
goto terminate_thread;
}
+ /* poke the IRQ handler so that we don't miss the first interrupt */
+ up(&card->spi_ready);
+
/* Start the card.
* This will call register_netdev, and we'll start
* getting interrupts... */
if_spi_terminate_spi_thread(card);
remove_card:
lbs_remove_card(priv); /* will call free_netdev */
-free_gpio:
- gpio_free(card->gpio_cs);
free_card:
free_if_spi_card(card);
out:
lbs_deb_spi("libertas_spi_remove\n");
lbs_deb_enter(LBS_DEB_SPI);
- priv->surpriseremoved = 1;
lbs_stop_card(priv);
+ lbs_remove_card(priv); /* will call free_netdev */
+
+ priv->surpriseremoved = 1;
free_irq(spi->irq, card);
if_spi_terminate_spi_thread(card);
- lbs_remove_card(priv); /* will call free_netdev */
- gpio_free(card->gpio_cs);
if (card->pdata->teardown)
card->pdata->teardown(spi);
free_if_spi_card(card);
MODULE_AUTHOR("Andrey Yurovsky <andrey@cozybit.com>, "
"Colin McCabe <colin@cozybit.com>");
MODULE_LICENSE("GPL");
+MODULE_ALIAS("spi:libertas_spi");
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff