diff options
Diffstat (limited to 'drivers/net/wireless')
| -rw-r--r-- | drivers/net/wireless/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/net/wireless/libertas/if_spi.c | 92 |
2 files changed, 45 insertions, 49 deletions
diff --git a/drivers/net/wireless/Kconfig b/drivers/net/wireless/Kconfig index daf4c805be5..fb7541c28e5 100644 --- a/drivers/net/wireless/Kconfig +++ b/drivers/net/wireless/Kconfig @@ -153,7 +153,7 @@ config LIBERTAS_SDIO config LIBERTAS_SPI tristate "Marvell Libertas 8686 SPI 802.11b/g cards" - depends on LIBERTAS && SPI && GENERIC_GPIO + depends on LIBERTAS && SPI ---help--- A driver for Marvell Libertas 8686 SPI devices. diff --git a/drivers/net/wireless/libertas/if_spi.c b/drivers/net/wireless/libertas/if_spi.c index ea23c5de142..f8c2898d82b 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; @@ -130,12 +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; } @@ -145,6 +135,13 @@ static int spu_write(struct if_spi_card *card, u16 reg, const u8 *buf, int len) { int err = 0; 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(®_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. */ @@ -153,13 +150,16 @@ 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 *)®_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; } @@ -186,10 +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 = 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. */ @@ -197,29 +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(®_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; } @@ -1049,7 +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); @@ -1058,26 +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"); @@ -1085,7 +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) " @@ -1096,23 +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; @@ -1157,8 +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: @@ -1179,7 +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); |