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authorAnton Arapov <anton@redhat.com>2012-04-16 10:05:28 +0200
committerAnton Arapov <anton@redhat.com>2012-04-16 10:05:28 +0200
commitb4b6116a13633898cf868f2f103c96a90c4c20f8 (patch)
tree93d1b7e2cfcdf473d8d4ff3ad141fa864f8491f6 /arch/arm/mach-mxs/module-tx28.c
parentedd4be777c953e5faafc80d091d3084b4343f5d3 (diff)
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fedora kernel: d9aad82f3319f3cfd1aebc01234254ef0c37ad84v3.3.2-1
Signed-off-by: Anton Arapov <anton@redhat.com>
Diffstat (limited to 'arch/arm/mach-mxs/module-tx28.c')
-rw-r--r--arch/arm/mach-mxs/module-tx28.c160
1 files changed, 160 insertions, 0 deletions
diff --git a/arch/arm/mach-mxs/module-tx28.c b/arch/arm/mach-mxs/module-tx28.c
new file mode 100644
index 00000000000..9a7b08b2a92
--- /dev/null
+++ b/arch/arm/mach-mxs/module-tx28.c
@@ -0,0 +1,160 @@
+/*
+ * 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_fec0_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 iomux_cfg_t tx28_fec1_pads[] __initconst = {
+ MX28_PAD_ENET0_RXD2__ENET1_RXD0,
+ MX28_PAD_ENET0_RXD3__ENET1_RXD1,
+ MX28_PAD_ENET0_TXD2__ENET1_TXD0,
+ MX28_PAD_ENET0_TXD3__ENET1_TXD1,
+ MX28_PAD_ENET0_COL__ENET1_TX_EN,
+ MX28_PAD_ENET0_CRS__ENET1_RX_EN,
+};
+
+static const struct fec_platform_data tx28_fec0_data __initconst = {
+ .phy = PHY_INTERFACE_MODE_RMII,
+};
+
+static const struct fec_platform_data tx28_fec1_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_fec0_pads,
+ ARRAY_SIZE(tx28_fec0_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 FEC0 device\n", __func__);
+ mx28_add_fec(0, &tx28_fec0_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;
+}
+
+int __init tx28_add_fec1(void)
+{
+ int ret;
+
+ ret = mxs_iomux_setup_multiple_pads(tx28_fec1_pads,
+ ARRAY_SIZE(tx28_fec1_pads));
+ if (ret) {
+ pr_debug("%s: mxs_iomux_setup_multiple_pads() failed with rc: %d\n",
+ __func__, ret);
+ return ret;
+ }
+ pr_debug("%s: Registering FEC1 device\n", __func__);
+ mx28_add_fec(1, &tx28_fec1_data);
+ return 0;
+}