[ARM] pxa/cm-x270: add libertas device registration
v2 changes:
- use gpio_to_irq instead of IRQ_GPIO
- check gpio_direction_output return value to be on the safe side :)
Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
diff --git a/arch/arm/mach-pxa/cm-x270.c b/arch/arm/mach-pxa/cm-x270.c
index 5929218..eea78b6 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 @@
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 @@
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 @@
/* interrupts */
GPIO10_GPIO, /* DM9000 interrupt */
GPIO83_GPIO, /* MMC card detect */
+ GPIO95_GPIO, /* WLAN interrupt */
};
/* V3020 RTC */
@@ -287,6 +298,100 @@
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 @@
cmx270_init_mmc();
cmx270_init_ohci();
cmx270_init_2700G();
+ cmx270_init_spi();
}