2 * Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 #include <linux/types.h>
20 #include <linux/init.h>
21 #include <linux/clk.h>
22 #include <linux/irq.h>
23 #include <linux/gpio.h>
24 #include <linux/smsc911x.h>
25 #include <linux/platform_device.h>
27 #include <mach/hardware.h>
28 #include <asm/mach-types.h>
29 #include <asm/mach/arch.h>
30 #include <asm/mach/time.h>
31 #include <asm/memory.h>
32 #include <asm/mach/map.h>
33 #include <mach/common.h>
34 #include <mach/board-mx31pdk.h>
35 #include <mach/imx-uart.h>
36 #include <mach/iomux-mx3.h>
42 * @brief This file contains the board-specific initialization routines.
47 static int mx31pdk_pins[] = {
53 IOMUX_MODE(MX31_PIN_GPIO1_1, IOMUX_CONFIG_GPIO),
56 static struct imxuart_platform_data uart_pdata = {
57 .flags = IMXUART_HAVE_RTSCTS,
61 * Support for the SMSC9217 on the Debug board.
64 static struct smsc911x_platform_config smsc911x_config = {
65 .irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
66 .irq_type = SMSC911X_IRQ_TYPE_PUSH_PULL,
67 .flags = SMSC911X_USE_16BIT | SMSC911X_FORCE_INTERNAL_PHY,
68 .phy_interface = PHY_INTERFACE_MODE_MII,
71 static struct resource smsc911x_resources[] = {
73 .start = LAN9217_BASE_ADDR,
74 .end = LAN9217_BASE_ADDR + 0xff,
75 .flags = IORESOURCE_MEM,
77 .start = EXPIO_INT_ENET,
78 .end = EXPIO_INT_ENET,
79 .flags = IORESOURCE_IRQ,
83 static struct platform_device smsc911x_device = {
86 .num_resources = ARRAY_SIZE(smsc911x_resources),
87 .resource = smsc911x_resources,
89 .platform_data = &smsc911x_config,
94 * Routines for the CPLD on the debug board. It contains a CPLD handling
95 * LEDs, switches, interrupts for Ethernet.
98 static void mx31pdk_expio_irq_handler(uint32_t irq, struct irq_desc *desc)
104 imr_val = __raw_readw(CPLD_INT_MASK_REG);
105 int_valid = __raw_readw(CPLD_INT_STATUS_REG) & ~imr_val;
107 expio_irq = MXC_EXP_IO_BASE;
108 for (; int_valid != 0; int_valid >>= 1, expio_irq++) {
109 if ((int_valid & 1) == 0)
111 generic_handle_irq(expio_irq);
116 * Disable an expio pin's interrupt by setting the bit in the imr.
117 * @param irq an expio virtual irq number
119 static void expio_mask_irq(uint32_t irq)
122 uint32_t expio = MXC_IRQ_TO_EXPIO(irq);
124 /* mask the interrupt */
125 reg = __raw_readw(CPLD_INT_MASK_REG);
127 __raw_writew(reg, CPLD_INT_MASK_REG);
131 * Acknowledge an expanded io pin's interrupt by clearing the bit in the isr.
132 * @param irq an expanded io virtual irq number
134 static void expio_ack_irq(uint32_t irq)
136 uint32_t expio = MXC_IRQ_TO_EXPIO(irq);
138 /* clear the interrupt status */
139 __raw_writew(1 << expio, CPLD_INT_RESET_REG);
140 __raw_writew(0, CPLD_INT_RESET_REG);
141 /* mask the interrupt */
146 * Enable a expio pin's interrupt by clearing the bit in the imr.
147 * @param irq a expio virtual irq number
149 static void expio_unmask_irq(uint32_t irq)
152 uint32_t expio = MXC_IRQ_TO_EXPIO(irq);
154 /* unmask the interrupt */
155 reg = __raw_readw(CPLD_INT_MASK_REG);
156 reg &= ~(1 << expio);
157 __raw_writew(reg, CPLD_INT_MASK_REG);
160 static struct irq_chip expio_irq_chip = {
161 .ack = expio_ack_irq,
162 .mask = expio_mask_irq,
163 .unmask = expio_unmask_irq,
166 static int __init mx31pdk_init_expio(void)
171 /* Check if there's a debug board connected */
172 if ((__raw_readw(CPLD_MAGIC_NUMBER1_REG) != 0xAAAA) ||
173 (__raw_readw(CPLD_MAGIC_NUMBER2_REG) != 0x5555) ||
174 (__raw_readw(CPLD_MAGIC_NUMBER3_REG) != 0xCAFE)) {
175 /* No Debug board found */
179 pr_info("i.MX31PDK Debug board detected, rev = 0x%04X\n",
180 __raw_readw(CPLD_CODE_VER_REG));
183 * Configure INT line as GPIO input
185 ret = gpio_request(IOMUX_TO_GPIO(MX31_PIN_GPIO1_1), "sms9217-irq");
187 pr_warning("could not get LAN irq gpio\n");
189 gpio_direction_input(IOMUX_TO_GPIO(MX31_PIN_GPIO1_1));
191 /* Disable the interrupts and clear the status */
192 __raw_writew(0, CPLD_INT_MASK_REG);
193 __raw_writew(0xFFFF, CPLD_INT_RESET_REG);
194 __raw_writew(0, CPLD_INT_RESET_REG);
195 __raw_writew(0x1F, CPLD_INT_MASK_REG);
196 for (i = MXC_EXP_IO_BASE;
197 i < (MXC_EXP_IO_BASE + MXC_MAX_EXP_IO_LINES);
199 set_irq_chip(i, &expio_irq_chip);
200 set_irq_handler(i, handle_level_irq);
201 set_irq_flags(i, IRQF_VALID);
203 set_irq_type(EXPIO_PARENT_INT, IRQ_TYPE_LEVEL_LOW);
204 set_irq_chained_handler(EXPIO_PARENT_INT, mx31pdk_expio_irq_handler);
210 * This structure defines the MX31 memory map.
212 static struct map_desc mx31pdk_io_desc[] __initdata = {
214 .virtual = SPBA0_BASE_ADDR_VIRT,
215 .pfn = __phys_to_pfn(SPBA0_BASE_ADDR),
216 .length = SPBA0_SIZE,
217 .type = MT_DEVICE_NONSHARED,
219 .virtual = CS5_BASE_ADDR_VIRT,
220 .pfn = __phys_to_pfn(CS5_BASE_ADDR),
227 * Set up static virtual mappings.
229 static void __init mx31pdk_map_io(void)
232 iotable_init(mx31pdk_io_desc, ARRAY_SIZE(mx31pdk_io_desc));
236 * Board specific initialization.
238 static void __init mxc_board_init(void)
240 mxc_iomux_setup_multiple_pins(mx31pdk_pins, ARRAY_SIZE(mx31pdk_pins),
243 mxc_register_device(&mxc_uart_device0, &uart_pdata);
245 if (!mx31pdk_init_expio())
246 platform_device_register(&smsc911x_device);
249 static void __init mx31pdk_timer_init(void)
251 mx31_clocks_init(26000000);
254 static struct sys_timer mx31pdk_timer = {
255 .init = mx31pdk_timer_init,
259 * The following uses standard kernel macros defined in arch.h in order to
260 * initialize __mach_desc_MX31PDK data structure.
262 MACHINE_START(MX31_3DS, "Freescale MX31PDK (3DS)")
263 /* Maintainer: Freescale Semiconductor, Inc. */
264 .phys_io = AIPS1_BASE_ADDR,
265 .io_pg_offst = ((AIPS1_BASE_ADDR_VIRT) >> 18) & 0xfffc,
266 .boot_params = PHYS_OFFSET + 0x100,
267 .map_io = mx31pdk_map_io,
268 .init_irq = mxc_init_irq,
269 .init_machine = mxc_board_init,
270 .timer = &mx31pdk_timer,