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path: root/drivers/net/wireless/libertas/if_spi.c
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Diffstat (limited to 'drivers/net/wireless/libertas/if_spi.c')
-rw-r--r--drivers/net/wireless/libertas/if_spi.c139
1 files changed, 72 insertions, 67 deletions
diff --git a/drivers/net/wireless/libertas/if_spi.c b/drivers/net/wireless/libertas/if_spi.c
index 07311e71af92..f8c2898d82b0 100644
--- a/drivers/net/wireless/libertas/if_spi.c
+++ b/drivers/net/wireless/libertas/if_spi.c
@@ -19,7 +19,6 @@
#include <linux/moduleparam.h>
#include <linux/firmware.h>
-#include <linux/gpio.h>
#include <linux/jiffies.h>
#include <linux/kthread.h>
#include <linux/list.h>
@@ -51,13 +50,6 @@ struct if_spi_card {
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;
@@ -119,9 +111,6 @@ static struct chip_ident chip_id_to_device_name[] = {
* 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)
@@ -133,12 +122,10 @@ 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;
}
@@ -147,7 +134,14 @@ static void spu_transaction_finish(struct if_spi_card *card)
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;
+ u16 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(&reg_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. */
@@ -156,29 +150,26 @@ static int spu_write(struct if_spi_card *card, u16 reg, const u8 *buf, int len)
spu_transaction_init(card);
/* write SPU register index */
- err = spi_write(card->spi, (u8 *)&reg_out, sizeof(u16));
- if (err)
- goto out;
+ reg_trans.tx_buf = &reg_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(&reg_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));
-}
+ u16 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)
@@ -195,10 +186,13 @@ 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;
+ u16 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. */
@@ -206,29 +200,34 @@ static int spu_read(struct if_spi_card *card, u16 reg, u8 *buf, int len)
spu_transaction_init(card);
+ spi_message_init(&m);
+ memset(&reg_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 *)&reg_out, sizeof(u16));
- if (err)
- goto out;
+ reg_trans.tx_buf = &reg_out;
+ reg_trans.len = sizeof(reg_out);
+ spi_message_add_tail(&reg_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;
}
@@ -236,18 +235,25 @@ out:
/* 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));
+ u16 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];
+ u32 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;
}
@@ -731,7 +737,7 @@ static int if_spi_c2h_data(struct if_spi_card *card)
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 %u\n",
+ "our maximum skb size is %lu\n",
__func__, len, MRVDRV_ETH_RX_PACKET_BUFFER_SIZE);
err = -EINVAL;
goto out;
@@ -814,6 +820,13 @@ static void if_spi_e2h(struct if_spi_card *card)
if (err)
goto out;
+ /* 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);
+
spin_lock_irqsave(&priv->driver_lock, flags);
lbs_queue_event(priv, cause & 0xff);
spin_unlock_irqrestore(&priv->driver_lock, flags);
@@ -1020,6 +1033,7 @@ static int __devinit if_spi_probe(struct spi_device *spi)
struct libertas_spi_platform_data *pdata = spi->dev.platform_data;
int err = 0;
u32 scratch;
+ struct sched_param param = { .sched_priority = 1 };
lbs_deb_enter(LBS_DEB_SPI);
@@ -1043,7 +1057,6 @@ 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);
@@ -1052,26 +1065,18 @@ static int __devinit if_spi_probe(struct spi_device *spi)
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");
@@ -1079,7 +1084,7 @@ static int __devinit if_spi_probe(struct spi_device *spi)
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) "
@@ -1090,23 +1095,23 @@ static int __devinit if_spi_probe(struct spi_device *spi)
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;
@@ -1123,6 +1128,9 @@ static int __devinit if_spi_probe(struct spi_device *spi)
lbs_pr_err("error creating SPI thread: err=%d\n", err);
goto remove_card;
}
+ if (sched_setscheduler(card->spi_thread, SCHED_FIFO, &param))
+ lbs_pr_err("Error setting scheduler, using default.\n");
+
err = request_irq(spi->irq, if_spi_host_interrupt,
IRQF_TRIGGER_FALLING, "libertas_spi", card);
if (err) {
@@ -1148,8 +1156,6 @@ terminate_thread:
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:
@@ -1170,7 +1176,6 @@ static int __devexit libertas_spi_remove(struct spi_device *spi)
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);
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-05 05:07:58 +0300