ARM: add support for the EET board, based on the i.MX31 pcm037 module

The "EET" variant of the pcm037 board has an OLED display, using a S6E63D6
display controller on the first SPI interface, using GPIO57 as a chip-select
for it. S6E63D6 is initialised in the boot-loader, so we only have to take care
of the LCD. EET also adds several buttons and LEDs on GPIOs. This patch adds a
"pcm037_variant=" kernel command line parameter to specify at boot-time which
board the kernel is running on, default is "pcm970", specify "eet" for the EET
board.

Signed-off-by: Guennadi Liakhovetski <lg@denx.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

5 files changed, 283 insertions, 6 deletions

diff --git a/arch/arm/mach-mx3/Kconfig b/arch/arm/mach-mx3/Kconfig
index 17a21a291e2..851f2458bf6 100644
--- a/arch/arm/mach-mx3/Kconfig
+++ b/arch/arm/mach-mx3/Kconfig
@@ -36,6 +36,14 @@ config MACH_PCM037
           Include support for Phytec pcm037 platform. This includes
           specific configurations for the board and its peripherals.
 
+config MACH_PCM037_EET
+        bool "Support pcm037 EET board extensions"
+        depends on MACH_PCM037
+        help
+          Add support for PCM037 EET baseboard extensions. If you are using the
+          OLED display with EET, use "video=mx3fb:CMEL-OLED" kernel
+          command-line parameter.
+
 config MACH_MX31LITE
         bool "Support MX31 LITEKIT (LogicPD)"
         select ARCH_MX31
diff --git a/arch/arm/mach-mx3/Makefile b/arch/arm/mach-mx3/Makefile
index 0322696bd11..6b9775471be 100644
--- a/arch/arm/mach-mx3/Makefile
+++ b/arch/arm/mach-mx3/Makefile
@@ -11,6 +11,7 @@ obj-$(CONFIG_MACH_MX31ADS)	+= mx31ads.o
 obj-$(CONFIG_MACH_MX31LILLY)    += mx31lilly.o mx31lilly-db.o
 obj-$(CONFIG_MACH_MX31LITE)     += mx31lite.o
 obj-$(CONFIG_MACH_PCM037)       += pcm037.o
+obj-$(CONFIG_MACH_PCM037_EET)   += pcm037_eet.o
 obj-$(CONFIG_MACH_MX31_3DS)     += mx31pdk.o
 obj-$(CONFIG_MACH_MX31MOBOARD)  += mx31moboard.o mx31moboard-devboard.o \
                                    mx31moboard-marxbot.o
diff --git a/arch/arm/mach-mx3/pcm037.c b/arch/arm/mach-mx3/pcm037.c
index d7b29b724a6..840cfda341d 100644
--- a/arch/arm/mach-mx3/pcm037.c
+++ b/arch/arm/mach-mx3/pcm037.c
@@ -52,6 +52,41 @@
 #include <mach/mxc_nand.h>
 
 #include "devices.h"
+#include "pcm037.h"
+
+static enum pcm037_board_variant pcm037_instance = PCM037_PCM970;
+
+static int __init pcm037_variant_setup(char *str)
+{
+        if (!strcmp("eet", str))
+                pcm037_instance = PCM037_EET;
+        else if (strcmp("pcm970", str))
+                pr_warning("Unknown pcm037 baseboard variant %s\n", str);
+
+        return 1;
+}
+
+/* Supported values: "pcm970" (default) and "eet" */
+__setup("pcm037_variant=", pcm037_variant_setup);
+
+enum pcm037_board_variant pcm037_variant(void)
+{
+        return pcm037_instance;
+}
+
+/* UART1 with RTS/CTS handshake signals */
+static unsigned int pcm037_uart1_handshake_pins[] = {
+        MX31_PIN_CTS1__CTS1,
+        MX31_PIN_RTS1__RTS1,
+        MX31_PIN_TXD1__TXD1,
+        MX31_PIN_RXD1__RXD1,
+};
+
+/* UART1 without RTS/CTS handshake signals */
+static unsigned int pcm037_uart1_pins[] = {
+        MX31_PIN_TXD1__TXD1,
+        MX31_PIN_RXD1__RXD1,
+};
 
 static unsigned int pcm037_pins[] = {
         /* I2C */
@@ -76,11 +111,6 @@ static unsigned int pcm037_pins[] = {
         MX31_PIN_CSPI1_SS0__SS0,
         MX31_PIN_CSPI1_SS1__SS1,
         MX31_PIN_CSPI1_SS2__SS2,
-        /* UART1 */
-        MX31_PIN_CTS1__CTS1,
-        MX31_PIN_RTS1__RTS1,
-        MX31_PIN_TXD1__TXD1,
-        MX31_PIN_RXD1__RXD1,
         /* UART2 */
         MX31_PIN_TXD2__TXD2,
         MX31_PIN_RXD2__RXD2,
@@ -459,6 +489,22 @@ static const struct fb_videomode fb_modedb[] = {
                 .sync           = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_OE_ACT_HIGH,
                 .vmode          = FB_VMODE_NONINTERLACED,
                 .flag           = 0,
+        }, {
+                /* 240x320 @ 60 Hz */
+                .name           = "CMEL-OLED",
+                .refresh        = 60,
+                .xres           = 240,
+                .yres           = 320,
+                .pixclock       = 185925,
+                .left_margin    = 9,
+                .right_margin   = 16,
+                .upper_margin   = 7,
+                .lower_margin   = 9,
+                .hsync_len      = 1,
+                .vsync_len      = 1,
+                .sync           = FB_SYNC_OE_ACT_HIGH | FB_SYNC_CLK_INVERT,
+                .vmode          = FB_VMODE_NONINTERLACED,
+                .flag           = 0,
         },
 };
 
@@ -479,6 +525,14 @@ static void __init mxc_board_init(void)
         mxc_iomux_setup_multiple_pins(pcm037_pins, ARRAY_SIZE(pcm037_pins),
                         "pcm037");
 
+        if (pcm037_variant() == PCM037_EET)
+                mxc_iomux_setup_multiple_pins(pcm037_uart1_pins,
+                        ARRAY_SIZE(pcm037_uart1_pins), "pcm037_uart1");
+        else
+                mxc_iomux_setup_multiple_pins(pcm037_uart1_handshake_pins,
+                        ARRAY_SIZE(pcm037_uart1_handshake_pins),
+                        "pcm037_uart1");
+
         platform_add_devices(devices, ARRAY_SIZE(devices));
 
         mxc_register_device(&mxc_uart_device0, &uart_pdata);
@@ -542,4 +596,3 @@ MACHINE_START(PCM037, "Phytec Phycore pcm037")
         .init_machine   = mxc_board_init,
         .timer          = &pcm037_timer,
 MACHINE_END
-
diff --git a/arch/arm/mach-mx3/pcm037.h b/arch/arm/mach-mx3/pcm037.h
new file mode 100644
index 00000000000..d6929721a5f
--- /dev/null
+++ b/arch/arm/mach-mx3/pcm037.h
@@ -0,0 +1,11 @@
+#ifndef __PCM037_H__
+#define __PCM037_H__
+
+enum pcm037_board_variant {
+        PCM037_PCM970,
+        PCM037_EET,
+};
+
+extern enum pcm037_board_variant pcm037_variant(void);
+
+#endif
diff --git a/arch/arm/mach-mx3/pcm037_eet.c b/arch/arm/mach-mx3/pcm037_eet.c
new file mode 100644
index 00000000000..fe52fb1bb8b
--- /dev/null
+++ b/arch/arm/mach-mx3/pcm037_eet.c
@@ -0,0 +1,204 @@
+/*
+ * Copyright (C) 2009
+ * Guennadi Liakhovetski, DENX Software Engineering, <lg@denx.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/gpio.h>
+#include <linux/gpio_keys.h>
+#include <linux/input.h>
+#include <linux/platform_device.h>
+#include <linux/spi/spi.h>
+
+#include <mach/common.h>
+#if defined(CONFIG_SPI_IMX) || defined(CONFIG_SPI_IMX_MODULE)
+#include <mach/spi.h>
+#endif
+#include <mach/iomux-mx3.h>
+
+#include <asm/mach-types.h>
+
+#include "pcm037.h"
+#include "devices.h"
+
+static unsigned int pcm037_eet_pins[] = {
+        /* SPI #1 */
+        MX31_PIN_CSPI1_MISO__MISO,
+        MX31_PIN_CSPI1_MOSI__MOSI,
+        MX31_PIN_CSPI1_SCLK__SCLK,
+        MX31_PIN_CSPI1_SPI_RDY__SPI_RDY,
+        MX31_PIN_CSPI1_SS0__SS0,
+        MX31_PIN_CSPI1_SS1__SS1,
+        MX31_PIN_CSPI1_SS2__SS2,
+
+        /* Reserve and hardwire GPIO 57 high - S6E63D6 chipselect */
+        IOMUX_MODE(MX31_PIN_KEY_COL7, IOMUX_CONFIG_GPIO),
+        /* GPIO keys */
+        IOMUX_MODE(MX31_PIN_GPIO1_0,    IOMUX_CONFIG_GPIO), /* 0 */
+        IOMUX_MODE(MX31_PIN_GPIO1_1,    IOMUX_CONFIG_GPIO), /* 1 */
+        IOMUX_MODE(MX31_PIN_GPIO1_2,    IOMUX_CONFIG_GPIO), /* 2 */
+        IOMUX_MODE(MX31_PIN_GPIO1_3,    IOMUX_CONFIG_GPIO), /* 3 */
+        IOMUX_MODE(MX31_PIN_SVEN0,      IOMUX_CONFIG_GPIO), /* 32 */
+        IOMUX_MODE(MX31_PIN_STX0,       IOMUX_CONFIG_GPIO), /* 33 */
+        IOMUX_MODE(MX31_PIN_SRX0,       IOMUX_CONFIG_GPIO), /* 34 */
+        IOMUX_MODE(MX31_PIN_SIMPD0,     IOMUX_CONFIG_GPIO), /* 35 */
+        IOMUX_MODE(MX31_PIN_RTS1,       IOMUX_CONFIG_GPIO), /* 38 */
+        IOMUX_MODE(MX31_PIN_CTS1,       IOMUX_CONFIG_GPIO), /* 39 */
+        IOMUX_MODE(MX31_PIN_KEY_ROW4,   IOMUX_CONFIG_GPIO), /* 50 */
+        IOMUX_MODE(MX31_PIN_KEY_ROW5,   IOMUX_CONFIG_GPIO), /* 51 */
+        IOMUX_MODE(MX31_PIN_KEY_ROW6,   IOMUX_CONFIG_GPIO), /* 52 */
+        IOMUX_MODE(MX31_PIN_KEY_ROW7,   IOMUX_CONFIG_GPIO), /* 53 */
+
+        /* LEDs */
+        IOMUX_MODE(MX31_PIN_DTR_DTE1,   IOMUX_CONFIG_GPIO), /* 44 */
+        IOMUX_MODE(MX31_PIN_DSR_DTE1,   IOMUX_CONFIG_GPIO), /* 45 */
+        IOMUX_MODE(MX31_PIN_KEY_COL5,   IOMUX_CONFIG_GPIO), /* 55 */
+        IOMUX_MODE(MX31_PIN_KEY_COL6,   IOMUX_CONFIG_GPIO), /* 56 */
+};
+
+/* SPI */
+static struct spi_board_info pcm037_spi_dev[] = {
+        {
+                .modalias       = "dac124s085",
+                .max_speed_hz   = 400000,
+                .bus_num        = 0,
+                .chip_select    = 0,            /* Index in pcm037_spi1_cs[] */
+                .mode           = SPI_CPHA,
+        },
+};
+
+/* Platform Data for MXC CSPI */
+#if defined(CONFIG_SPI_IMX) || defined(CONFIG_SPI_IMX_MODULE)
+static int pcm037_spi1_cs[] = {MXC_SPI_CS(1), IOMUX_TO_GPIO(MX31_PIN_KEY_COL7)};
+
+struct spi_imx_master pcm037_spi1_master = {
+        .chipselect = pcm037_spi1_cs,
+        .num_chipselect = ARRAY_SIZE(pcm037_spi1_cs),
+};
+#endif
+
+/* GPIO-keys input device */
+static struct gpio_keys_button pcm037_gpio_keys[] = {
+        {
+                .type   = EV_KEY,
+                .code   = KEY_L,
+                .gpio   = 0,
+                .desc   = "Wheel Manual",
+                .wakeup = 0,
+        }, {
+                .type   = EV_KEY,
+                .code   = KEY_A,
+                .gpio   = 1,
+                .desc   = "Wheel AF",
+                .wakeup = 0,
+        }, {
+                .type   = EV_KEY,
+                .code   = KEY_V,
+                .gpio   = 2,
+                .desc   = "Wheel View",
+                .wakeup = 0,
+        }, {
+                .type   = EV_KEY,
+                .code   = KEY_M,
+                .gpio   = 3,
+                .desc   = "Wheel Menu",
+                .wakeup = 0,
+        }, {
+                .type   = EV_KEY,
+                .code   = KEY_UP,
+                .gpio   = 32,
+                .desc   = "Nav Pad Up",
+                .wakeup = 0,
+        }, {
+                .type   = EV_KEY,
+                .code   = KEY_RIGHT,
+                .gpio   = 33,
+                .desc   = "Nav Pad Right",
+                .wakeup = 0,
+        }, {
+                .type   = EV_KEY,
+                .code   = KEY_DOWN,
+                .gpio   = 34,
+                .desc   = "Nav Pad Down",
+                .wakeup = 0,
+        }, {
+                .type   = EV_KEY,
+                .code   = KEY_LEFT,
+                .gpio   = 35,
+                .desc   = "Nav Pad Left",
+                .wakeup = 0,
+        }, {
+                .type   = EV_KEY,
+                .code   = KEY_ENTER,
+                .gpio   = 38,
+                .desc   = "Nav Pad Ok",
+                .wakeup = 0,
+        }, {
+                .type   = EV_KEY,
+                .code   = KEY_O,
+                .gpio   = 39,
+                .desc   = "Wheel Off",
+                .wakeup = 0,
+        }, {
+                .type   = EV_KEY,
+                .code   = BTN_FORWARD,
+                .gpio   = 50,
+                .desc   = "Focus Forward",
+                .wakeup = 0,
+        }, {
+                .type   = EV_KEY,
+                .code   = BTN_BACK,
+                .gpio   = 51,
+                .desc   = "Focus Backward",
+                .wakeup = 0,
+        }, {
+                .type   = EV_KEY,
+                .code   = BTN_MIDDLE,
+                .gpio   = 52,
+                .desc   = "Release Half",
+                .wakeup = 0,
+        }, {
+                .type   = EV_KEY,
+                .code   = BTN_EXTRA,
+                .gpio   = 53,
+                .desc   = "Release Full",
+                .wakeup = 0,
+        },
+};
+
+static struct gpio_keys_platform_data pcm037_gpio_keys_platform_data = {
+        .buttons        = pcm037_gpio_keys,
+        .nbuttons       = ARRAY_SIZE(pcm037_gpio_keys),
+        .rep            = 0, /* No auto-repeat */
+};
+
+static struct platform_device pcm037_gpio_keys_device = {
+        .name   = "gpio-keys",
+        .id     = -1,
+        .dev    = {
+                .platform_data  = &pcm037_gpio_keys_platform_data,
+        },
+};
+
+static int eet_init_devices(void)
+{
+        if (!machine_is_pcm037() || pcm037_variant() != PCM037_EET)
+                return 0;
+
+        mxc_iomux_setup_multiple_pins(pcm037_eet_pins,
+                                ARRAY_SIZE(pcm037_eet_pins), "pcm037_eet");
+
+        /* SPI */
+        spi_register_board_info(pcm037_spi_dev, ARRAY_SIZE(pcm037_spi_dev));
+#if defined(CONFIG_SPI_IMX) || defined(CONFIG_SPI_IMX_MODULE)
+        mxc_register_device(&mxc_spi_device0, &pcm037_spi1_master);
+#endif
+
+        platform_device_register(&pcm037_gpio_keys_device);
+
+        return 0;
+}
+
+late_initcall(eet_init_devices);