diff options
| -rw-r--r-- | arch/arm/mach-pxa/cm-x270.c | 110 |
1 files changed, 108 insertions, 2 deletions
diff --git a/arch/arm/mach-pxa/cm-x270.c b/arch/arm/mach-pxa/cm-x270.c index 59292181088..eea78b6c2bc 100644 --- a/arch/arm/mach-pxa/cm-x270.c +++ b/arch/arm/mach-pxa/cm-x270.c @@ -13,13 +13,18 @@ #include <linux/sysdev.h> #include <linux/irq.h> #include <linux/gpio.h> +#include <linux/delay.h> #include <linux/rtc-v3020.h> #include <video/mbxfb.h> +#include <linux/spi/spi.h> +#include <linux/spi/libertas_spi.h> + #include <mach/pxa27x.h> #include <mach/ohci.h> #include <mach/mmc.h> +#include <mach/pxa2xx_spi.h> #include "generic.h" @@ -34,6 +39,10 @@ /* MMC power enable */ #define GPIO105_MMC_POWER (105) +/* WLAN GPIOS */ +#define GPIO19_WLAN_STRAP (19) +#define GPIO102_WLAN_RST (102) + static unsigned long cmx270_pin_config[] = { /* AC'97 */ GPIO28_AC97_BITCLK, @@ -94,8 +103,8 @@ static unsigned long cmx270_pin_config[] = { GPIO26_SSP1_RXD, /* SSP2 */ - GPIO19_SSP2_SCLK, - GPIO14_SSP2_SFRM, + GPIO19_GPIO, /* SSP2 clock is used as GPIO for Libertas pin-strap */ + GPIO14_GPIO, GPIO87_SSP2_TXD, GPIO88_SSP2_RXD, @@ -123,6 +132,7 @@ static unsigned long cmx270_pin_config[] = { GPIO0_GPIO | WAKEUP_ON_EDGE_BOTH, GPIO105_GPIO | MFP_LPM_DRIVE_HIGH, /* MMC/SD power */ GPIO53_GPIO, /* PC card reset */ + GPIO102_GPIO, /* WLAN reset */ /* NAND controls */ GPIO11_GPIO | MFP_LPM_DRIVE_HIGH, /* NAND CE# */ @@ -131,6 +141,7 @@ static unsigned long cmx270_pin_config[] = { /* interrupts */ GPIO10_GPIO, /* DM9000 interrupt */ GPIO83_GPIO, /* MMC card detect */ + GPIO95_GPIO, /* WLAN interrupt */ }; /* V3020 RTC */ @@ -287,6 +298,100 @@ static void __init cmx270_init_mmc(void) static inline void cmx270_init_mmc(void) {} #endif +#if defined(CONFIG_SPI_PXA2XX) || defined(CONFIG_SPI_PXA2XX_MODULE) +static struct pxa2xx_spi_master cm_x270_spi_info = { + .num_chipselect = 1, + .enable_dma = 1, +}; + +static struct pxa2xx_spi_chip cm_x270_libertas_chip = { + .rx_threshold = 1, + .tx_threshold = 1, + .timeout = 1000, + .gpio_cs = 14, +}; + +static unsigned long cm_x270_libertas_pin_config[] = { + /* SSP2 */ + GPIO19_SSP2_SCLK, + GPIO14_GPIO, + GPIO87_SSP2_TXD, + GPIO88_SSP2_RXD, + +}; + +static int cm_x270_libertas_setup(struct spi_device *spi) +{ + int err = gpio_request(GPIO19_WLAN_STRAP, "WLAN STRAP"); + if (err) + return err; + + err = gpio_request(GPIO102_WLAN_RST, "WLAN RST"); + if (err) + goto err_free_strap; + + err = gpio_direction_output(GPIO102_WLAN_RST, 0); + if (err) + goto err_free_strap; + msleep(100); + + err = gpio_direction_output(GPIO19_WLAN_STRAP, 1); + if (err) + goto err_free_strap; + msleep(100); + + pxa2xx_mfp_config(ARRAY_AND_SIZE(cm_x270_libertas_pin_config)); + + gpio_set_value(GPIO102_WLAN_RST, 1); + msleep(100); + + spi->bits_per_word = 16; + spi_setup(spi); + + return 0; + +err_free_strap: + gpio_free(GPIO19_WLAN_STRAP); + + return err; +} + +static int cm_x270_libertas_teardown(struct spi_device *spi) +{ + gpio_set_value(GPIO102_WLAN_RST, 0); + gpio_free(GPIO102_WLAN_RST); + gpio_free(GPIO19_WLAN_STRAP); + + return 0; +} + +struct libertas_spi_platform_data cm_x270_libertas_pdata = { + .use_dummy_writes = 1, + .setup = cm_x270_libertas_setup, + .teardown = cm_x270_libertas_teardown, +}; + +static struct spi_board_info cm_x270_spi_devices[] __initdata = { + { + .modalias = "libertas_spi", + .max_speed_hz = 13000000, + .bus_num = 2, + .irq = gpio_to_irq(95), + .chip_select = 0, + .controller_data = &cm_x270_libertas_chip, + .platform_data = &cm_x270_libertas_pdata, + }, +}; + +static void __init cmx270_init_spi(void) +{ + pxa2xx_set_spi_info(2, &cm_x270_spi_info); + spi_register_board_info(ARRAY_AND_SIZE(cm_x270_spi_devices)); +} +#else +static inline void cmx270_init_spi(void) {} +#endif + void __init cmx270_init(void) { pxa2xx_mfp_config(ARRAY_AND_SIZE(cmx270_pin_config)); @@ -299,4 +404,5 @@ void __init cmx270_init(void) cmx270_init_mmc(); cmx270_init_ohci(); cmx270_init_2700G(); + cmx270_init_spi(); } |