ARM: mxs: Initial support for Ka-Ro TX28

Based on code created by Lothar Waßmann, Sascha Hauer, Wolfram Sang and
me.

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

7 files changed, 335 insertions, 2 deletions

diff --git a/arch/arm/mach-mxs/Kconfig b/arch/arm/mach-mxs/Kconfig
index 836cc81a63a1..895d06604e15 100644
--- a/arch/arm/mach-mxs/Kconfig
+++ b/arch/arm/mach-mxs/Kconfig
@@ -39,4 +39,16 @@ config MACH_MX28EVK
           Include support for MX28EVK platform. This includes specific
           configurations for the board and its peripherals.
 
+config MODULE_TX28
+        bool
+        select SOC_IMX28
+        select MXS_HAVE_AMBA_DUART
+        select MXS_HAVE_PLATFORM_AUART
+        select MXS_HAVE_PLATFORM_FEC
+        select MXS_HAVE_PLATFORM_MXS_PWM
+
+config MACH_TX28
+        bool "Ka-Ro TX28 module"
+        select MODULE_TX28
+
 endif
diff --git a/arch/arm/mach-mxs/Makefile b/arch/arm/mach-mxs/Makefile
index 6b26f02e72a2..2f1f6141ca71 100644
--- a/arch/arm/mach-mxs/Makefile
+++ b/arch/arm/mach-mxs/Makefile
@@ -9,5 +9,7 @@ obj-$(CONFIG_SOC_IMX28) += clock-mx28.o mm-mx28.o
 
 obj-$(CONFIG_MACH_MX23EVK) += mach-mx23evk.o
 obj-$(CONFIG_MACH_MX28EVK) += mach-mx28evk.o
+obj-$(CONFIG_MODULE_TX28) += module-tx28.o
+obj-$(CONFIG_MACH_TX28)    += mach-tx28.o
 
 obj-y += devices/
diff --git a/arch/arm/mach-mxs/include/mach/mxs.h b/arch/arm/mach-mxs/include/mach/mxs.h
index f186c08c2911..35a89dd27242 100644
--- a/arch/arm/mach-mxs/include/mach/mxs.h
+++ b/arch/arm/mach-mxs/include/mach/mxs.h
@@ -28,8 +28,13 @@
 /*
  * MXS CPU types
  */
-#define cpu_is_mx23()           (machine_is_mx23evk())
-#define cpu_is_mx28()           (machine_is_mx28evk())
+#define cpu_is_mx23()           (                                       \
+                machine_is_mx23evk() ||                                 \
+                0)
+#define cpu_is_mx28()           (                                       \
+                machine_is_mx28evk() ||                                 \
+                machine_is_tx28() ||                                    \
+                0)
 
 /*
  * IO addresses common to MXS-based
diff --git a/arch/arm/mach-mxs/include/mach/uncompress.h b/arch/arm/mach-mxs/include/mach/uncompress.h
index a005e76f34f9..f12a1732d8b8 100644
--- a/arch/arm/mach-mxs/include/mach/uncompress.h
+++ b/arch/arm/mach-mxs/include/mach/uncompress.h
@@ -63,6 +63,7 @@ static inline void __arch_decomp_setup(unsigned long arch_id)
                 mxs_duart_base = MX23_DUART_BASE_ADDR;
                 break;
         case MACH_TYPE_MX28EVK:
+        case MACH_TYPE_TX28:
                 mxs_duart_base = MX28_DUART_BASE_ADDR;
                 break;
         default:
diff --git a/arch/arm/mach-mxs/mach-tx28.c b/arch/arm/mach-mxs/mach-tx28.c
new file mode 100644
index 000000000000..b609b84784d0
--- /dev/null
+++ b/arch/arm/mach-mxs/mach-tx28.c
@@ -0,0 +1,173 @@
+/*
+ * Copyright (C) 2010 <LW@KARO-electronics.de>
+ *
+ * based on: mach-mx28_evk.c
+ * Copyright 2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * 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/kernel.h>
+#include <linux/gpio.h>
+#include <linux/leds.h>
+#include <linux/platform_device.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/spi_gpio.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/time.h>
+
+#include <mach/common.h>
+#include <mach/iomux-mx28.h>
+
+#include "devices-mx28.h"
+#include "module-tx28.h"
+
+#define TX28_STK5_GPIO_LED              MXS_GPIO_NR(4, 10)
+
+static const iomux_cfg_t tx28_stk5v3_pads[] __initconst = {
+        /* LED */
+        MX28_PAD_ENET0_RXD3__GPIO_4_10 |
+                MXS_PAD_3V3 | MXS_PAD_4MA | MXS_PAD_NOPULL,
+
+        /* framebuffer */
+#define LCD_MODE (MXS_PAD_3V3 | MXS_PAD_4MA)
+        MX28_PAD_LCD_D00__LCD_D0 | LCD_MODE,
+        MX28_PAD_LCD_D01__LCD_D1 | LCD_MODE,
+        MX28_PAD_LCD_D02__LCD_D2 | LCD_MODE,
+        MX28_PAD_LCD_D03__LCD_D3 | LCD_MODE,
+        MX28_PAD_LCD_D04__LCD_D4 | LCD_MODE,
+        MX28_PAD_LCD_D05__LCD_D5 | LCD_MODE,
+        MX28_PAD_LCD_D06__LCD_D6 | LCD_MODE,
+        MX28_PAD_LCD_D07__LCD_D7 | LCD_MODE,
+        MX28_PAD_LCD_D08__LCD_D8 | LCD_MODE,
+        MX28_PAD_LCD_D09__LCD_D9 | LCD_MODE,
+        MX28_PAD_LCD_D10__LCD_D10 | LCD_MODE,
+        MX28_PAD_LCD_D11__LCD_D11 | LCD_MODE,
+        MX28_PAD_LCD_D12__LCD_D12 | LCD_MODE,
+        MX28_PAD_LCD_D13__LCD_D13 | LCD_MODE,
+        MX28_PAD_LCD_D14__LCD_D14 | LCD_MODE,
+        MX28_PAD_LCD_D15__LCD_D15 | LCD_MODE,
+        MX28_PAD_LCD_D16__LCD_D16 | LCD_MODE,
+        MX28_PAD_LCD_D17__LCD_D17 | LCD_MODE,
+        MX28_PAD_LCD_D18__LCD_D18 | LCD_MODE,
+        MX28_PAD_LCD_D19__LCD_D19 | LCD_MODE,
+        MX28_PAD_LCD_D20__LCD_D20 | LCD_MODE,
+        MX28_PAD_LCD_D21__LCD_D21 | LCD_MODE,
+        MX28_PAD_LCD_D22__LCD_D22 | LCD_MODE,
+        MX28_PAD_LCD_D23__LCD_D23 | LCD_MODE,
+        MX28_PAD_LCD_RD_E__LCD_VSYNC | LCD_MODE,
+        MX28_PAD_LCD_WR_RWN__LCD_HSYNC | LCD_MODE,
+        MX28_PAD_LCD_RS__LCD_DOTCLK | LCD_MODE,
+        MX28_PAD_LCD_CS__LCD_CS | LCD_MODE,
+        MX28_PAD_LCD_VSYNC__LCD_VSYNC | LCD_MODE,
+        MX28_PAD_LCD_HSYNC__LCD_HSYNC | LCD_MODE,
+        MX28_PAD_LCD_DOTCLK__LCD_DOTCLK | LCD_MODE,
+        MX28_PAD_LCD_ENABLE__GPIO_1_31 | LCD_MODE,
+        MX28_PAD_LCD_RESET__GPIO_3_30 | LCD_MODE,
+        MX28_PAD_PWM0__PWM_0 | LCD_MODE,
+
+        /* UART1 */
+        MX28_PAD_AUART0_CTS__DUART_RX,
+        MX28_PAD_AUART0_RTS__DUART_TX,
+        MX28_PAD_AUART0_TX__DUART_RTS,
+        MX28_PAD_AUART0_RX__DUART_CTS,
+
+        /* UART2 */
+        MX28_PAD_AUART1_RX__AUART1_RX,
+        MX28_PAD_AUART1_TX__AUART1_TX,
+        MX28_PAD_AUART1_RTS__AUART1_RTS,
+        MX28_PAD_AUART1_CTS__AUART1_CTS,
+
+        /* CAN */
+        MX28_PAD_GPMI_RDY2__CAN0_TX,
+        MX28_PAD_GPMI_RDY3__CAN0_RX,
+
+        /* I2C */
+        MX28_PAD_I2C0_SCL__I2C0_SCL,
+        MX28_PAD_I2C0_SDA__I2C0_SDA,
+
+        /* TSC2007 */
+        MX28_PAD_SAIF0_MCLK__GPIO_3_20 | MXS_PAD_3V3 | MXS_PAD_4MA | MXS_PAD_PULLUP,
+
+        /* MMC0 */
+        MX28_PAD_SSP0_DATA0__SSP0_D0 |
+                (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+        MX28_PAD_SSP0_DATA1__SSP0_D1 |
+                (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+        MX28_PAD_SSP0_DATA2__SSP0_D2 |
+                (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+        MX28_PAD_SSP0_DATA3__SSP0_D3 |
+                (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+        MX28_PAD_SSP0_DATA4__SSP0_D4 |
+                (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+        MX28_PAD_SSP0_DATA5__SSP0_D5 |
+                (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+        MX28_PAD_SSP0_DATA6__SSP0_D6 |
+                (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+        MX28_PAD_SSP0_DATA7__SSP0_D7 |
+                (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+        MX28_PAD_SSP0_CMD__SSP0_CMD |
+                (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+        MX28_PAD_SSP0_DETECT__SSP0_CARD_DETECT |
+                (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
+        MX28_PAD_SSP0_SCK__SSP0_SCK |
+                (MXS_PAD_12MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
+};
+
+static struct gpio_led tx28_stk5v3_leds[] = {
+        {
+                .name = "GPIO-LED",
+                .default_trigger = "heartbeat",
+                .gpio = TX28_STK5_GPIO_LED,
+        },
+};
+
+static const struct gpio_led_platform_data tx28_stk5v3_led_data __initconst = {
+        .leds = tx28_stk5v3_leds,
+        .num_leds = ARRAY_SIZE(tx28_stk5v3_leds),
+};
+
+static struct spi_board_info tx28_spi_board_info[] = {
+        {
+                .modalias = "spidev",
+                .max_speed_hz = 20000000,
+                .bus_num = 0,
+                .chip_select = 1,
+                .controller_data = (void *)SPI_GPIO_NO_CHIPSELECT,
+                .mode = SPI_MODE_0,
+        },
+};
+
+static void __init tx28_stk5v3_init(void)
+{
+        mxs_iomux_setup_multiple_pads(tx28_stk5v3_pads,
+                        ARRAY_SIZE(tx28_stk5v3_pads));
+
+        mx28_add_duart(); /* UART1 */
+        mx28_add_auart(1); /* UART2 */
+
+        tx28_add_fec0();
+        /* spi via ssp will be added when available */
+        spi_register_board_info(tx28_spi_board_info,
+                        ARRAY_SIZE(tx28_spi_board_info));
+        mxs_add_platform_device("leds-gpio", 0, NULL, 0,
+                        &tx28_stk5v3_led_data, sizeof(tx28_stk5v3_led_data));
+}
+
+static void __init tx28_timer_init(void)
+{
+        mx28_clocks_init();
+}
+
+static struct sys_timer tx28_timer = {
+        .init = tx28_timer_init,
+};
+
+MACHINE_START(TX28, "Ka-Ro electronics TX28 module")
+        .map_io = mx28_map_io,
+        .init_irq = mx28_init_irq,
+        .init_machine = tx28_stk5v3_init,
+        .timer = &tx28_timer,
+MACHINE_END
diff --git a/arch/arm/mach-mxs/module-tx28.c b/arch/arm/mach-mxs/module-tx28.c
new file mode 100644
index 000000000000..fa0b154da67b
--- /dev/null
+++ b/arch/arm/mach-mxs/module-tx28.c
@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2010 <LW@KARO-electronics.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/delay.h>
+#include <linux/fec.h>
+#include <linux/gpio.h>
+
+#include <mach/iomux-mx28.h>
+#include "../devices-mx28.h"
+
+#include "module-tx28.h"
+
+#define TX28_FEC_PHY_POWER      MXS_GPIO_NR(3, 29)
+#define TX28_FEC_PHY_RESET      MXS_GPIO_NR(4, 13)
+
+static const iomux_cfg_t tx28_fec_gpio_pads[] __initconst = {
+        /* PHY POWER */
+        MX28_PAD_PWM4__GPIO_3_29 |
+                MXS_PAD_4MA | MXS_PAD_NOPULL | MXS_PAD_3V3,
+        /* PHY RESET */
+        MX28_PAD_ENET0_RX_CLK__GPIO_4_13 |
+                MXS_PAD_4MA | MXS_PAD_NOPULL | MXS_PAD_3V3,
+        /* Mode strap pins 0-2 */
+        MX28_PAD_ENET0_RXD0__GPIO_4_3 |
+                MXS_PAD_8MA | MXS_PAD_PULLUP | MXS_PAD_3V3,
+        MX28_PAD_ENET0_RXD1__GPIO_4_4 |
+                MXS_PAD_8MA | MXS_PAD_PULLUP | MXS_PAD_3V3,
+        MX28_PAD_ENET0_RX_EN__GPIO_4_2 |
+                MXS_PAD_8MA | MXS_PAD_PULLUP | MXS_PAD_3V3,
+        /* nINT */
+        MX28_PAD_ENET0_TX_CLK__GPIO_4_5 |
+                MXS_PAD_4MA | MXS_PAD_NOPULL | MXS_PAD_3V3,
+
+        MX28_PAD_ENET0_MDC__GPIO_4_0,
+        MX28_PAD_ENET0_MDIO__GPIO_4_1,
+        MX28_PAD_ENET0_TX_EN__GPIO_4_6,
+        MX28_PAD_ENET0_TXD0__GPIO_4_7,
+        MX28_PAD_ENET0_TXD1__GPIO_4_8,
+        MX28_PAD_ENET_CLK__GPIO_4_16,
+};
+
+#define FEC_MODE (MXS_PAD_8MA | MXS_PAD_PULLUP | MXS_PAD_3V3)
+static const iomux_cfg_t tx28_fec_pads[] __initconst = {
+        MX28_PAD_ENET0_MDC__ENET0_MDC | FEC_MODE,
+        MX28_PAD_ENET0_MDIO__ENET0_MDIO | FEC_MODE,
+        MX28_PAD_ENET0_RX_EN__ENET0_RX_EN | FEC_MODE,
+        MX28_PAD_ENET0_RXD0__ENET0_RXD0 | FEC_MODE,
+        MX28_PAD_ENET0_RXD1__ENET0_RXD1 | FEC_MODE,
+        MX28_PAD_ENET0_TX_EN__ENET0_TX_EN | FEC_MODE,
+        MX28_PAD_ENET0_TXD0__ENET0_TXD0 | FEC_MODE,
+        MX28_PAD_ENET0_TXD1__ENET0_TXD1 | FEC_MODE,
+        MX28_PAD_ENET_CLK__CLKCTRL_ENET | FEC_MODE,
+};
+
+static const struct fec_platform_data tx28_fec_data __initconst = {
+        .phy = PHY_INTERFACE_MODE_RMII,
+};
+
+int __init tx28_add_fec0(void)
+{
+        int i, ret;
+
+        pr_debug("%s: Switching FEC PHY power off\n", __func__);
+        ret = mxs_iomux_setup_multiple_pads(tx28_fec_gpio_pads,
+                        ARRAY_SIZE(tx28_fec_gpio_pads));
+        for (i = 0; i < ARRAY_SIZE(tx28_fec_gpio_pads); i++) {
+                unsigned int gpio = MXS_GPIO_NR(PAD_BANK(tx28_fec_gpio_pads[i]),
+                        PAD_PIN(tx28_fec_gpio_pads[i]));
+
+                ret = gpio_request(gpio, "FEC");
+                if (ret) {
+                        pr_err("Failed to request GPIO_%d_%d: %d\n",
+                                PAD_BANK(tx28_fec_gpio_pads[i]),
+                                PAD_PIN(tx28_fec_gpio_pads[i]), ret);
+                        goto free_gpios;
+                }
+                ret = gpio_direction_output(gpio, 0);
+                if (ret) {
+                        pr_err("Failed to set direction of GPIO_%d_%d to output: %d\n",
+                                        gpio / 32 + 1, gpio % 32, ret);
+                        goto free_gpios;
+                }
+        }
+
+        /* Power up fec phy */
+        pr_debug("%s: Switching FEC PHY power on\n", __func__);
+        ret = gpio_direction_output(TX28_FEC_PHY_POWER, 1);
+        if (ret) {
+                pr_err("Failed to power on PHY: %d\n", ret);
+                goto free_gpios;
+        }
+        mdelay(26); /* 25ms according to data sheet */
+
+        /* nINT */
+        gpio_direction_input(MXS_GPIO_NR(4, 5));
+        /* Mode strap pins */
+        gpio_direction_output(MXS_GPIO_NR(4, 2), 1);
+        gpio_direction_output(MXS_GPIO_NR(4, 3), 1);
+        gpio_direction_output(MXS_GPIO_NR(4, 4), 1);
+
+        udelay(100); /* minimum assertion time for nRST */
+
+        pr_debug("%s: Deasserting FEC PHY RESET\n", __func__);
+        gpio_set_value(TX28_FEC_PHY_RESET, 1);
+
+        ret = mxs_iomux_setup_multiple_pads(tx28_fec_pads,
+                        ARRAY_SIZE(tx28_fec_pads));
+        if (ret) {
+                pr_debug("%s: mxs_iomux_setup_multiple_pads() failed with rc: %d\n",
+                                __func__, ret);
+                goto free_gpios;
+        }
+        pr_debug("%s: Registering FEC device\n", __func__);
+        mx28_add_fec(0, &tx28_fec_data);
+        return 0;
+
+free_gpios:
+        while (--i >= 0) {
+                unsigned int gpio = MXS_GPIO_NR(PAD_BANK(tx28_fec_gpio_pads[i]),
+                        PAD_PIN(tx28_fec_gpio_pads[i]));
+
+                gpio_free(gpio);
+        }
+
+        return ret;
+}
diff --git a/arch/arm/mach-mxs/module-tx28.h b/arch/arm/mach-mxs/module-tx28.h
new file mode 100644
index 000000000000..df9e1b6e81bf
--- /dev/null
+++ b/arch/arm/mach-mxs/module-tx28.h
@@ -0,0 +1,9 @@
+/*
+ * Copyright (C) 2010 Pengutronix
+ *   Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.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.
+ */
+int __init tx28_add_fec0(void);