2 * Copyright (C) 1999,2000 Arm Limited
3 * Copyright (C) 2000 Deep Blue Solutions Ltd
4 * Copyright (C) 2002 Shane Nay (shane@minirl.com)
5 * Copyright 2005-2007 Freescale Semiconductor, Inc. All Rights Reserved.
6 * - add MX31 specific definitions
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
20 #include <linux/init.h>
21 #include <linux/err.h>
23 #include <asm/pgtable.h>
24 #include <asm/mach/map.h>
25 #include <asm/hardware/cache-l2x0.h>
27 #include <mach/common.h>
28 #include <mach/hardware.h>
29 #include <mach/iomux-v3.h>
30 #include <mach/gpio.h>
31 #include <mach/irqs.h>
33 #ifdef CONFIG_SOC_IMX31
34 static struct map_desc mx31_io_desc[] __initdata = {
35 imx_map_entry(MX31, X_MEMC, MT_DEVICE),
36 imx_map_entry(MX31, AVIC, MT_DEVICE_NONSHARED),
37 imx_map_entry(MX31, AIPS1, MT_DEVICE_NONSHARED),
38 imx_map_entry(MX31, AIPS2, MT_DEVICE_NONSHARED),
39 imx_map_entry(MX31, SPBA0, MT_DEVICE_NONSHARED),
43 * This function initializes the memory map. It is called during the
44 * system startup to create static physical to virtual memory mappings
47 void __init mx31_map_io(void)
49 iotable_init(mx31_io_desc, ARRAY_SIZE(mx31_io_desc));
52 void __init imx31_init_early(void)
54 mxc_set_cpu_type(MXC_CPU_MX31);
55 mxc_arch_reset_init(MX31_IO_ADDRESS(MX31_WDOG_BASE_ADDR));
58 static struct mxc_gpio_port imx31_gpio_ports[] = {
59 DEFINE_IMX_GPIO_PORT_IRQ(MX31, 0, 1, MX31_INT_GPIO1),
60 DEFINE_IMX_GPIO_PORT_IRQ(MX31, 1, 2, MX31_INT_GPIO2),
61 DEFINE_IMX_GPIO_PORT_IRQ(MX31, 2, 3, MX31_INT_GPIO3),
64 void __init mx31_init_irq(void)
66 mxc_init_irq(MX31_IO_ADDRESS(MX31_AVIC_BASE_ADDR));
67 mxc_gpio_init(imx31_gpio_ports, ARRAY_SIZE(imx31_gpio_ports));
69 #endif /* ifdef CONFIG_SOC_IMX31 */
71 #ifdef CONFIG_SOC_IMX35
72 static struct map_desc mx35_io_desc[] __initdata = {
73 imx_map_entry(MX35, X_MEMC, MT_DEVICE),
74 imx_map_entry(MX35, AVIC, MT_DEVICE_NONSHARED),
75 imx_map_entry(MX35, AIPS1, MT_DEVICE_NONSHARED),
76 imx_map_entry(MX35, AIPS2, MT_DEVICE_NONSHARED),
77 imx_map_entry(MX35, SPBA0, MT_DEVICE_NONSHARED),
80 void __init mx35_map_io(void)
82 iotable_init(mx35_io_desc, ARRAY_SIZE(mx35_io_desc));
85 void __init imx35_init_early(void)
87 mxc_set_cpu_type(MXC_CPU_MX35);
88 mxc_iomux_v3_init(MX35_IO_ADDRESS(MX35_IOMUXC_BASE_ADDR));
89 mxc_arch_reset_init(MX35_IO_ADDRESS(MX35_WDOG_BASE_ADDR));
92 static struct mxc_gpio_port imx35_gpio_ports[] = {
93 DEFINE_IMX_GPIO_PORT_IRQ(MX35, 0, 1, MX35_INT_GPIO1),
94 DEFINE_IMX_GPIO_PORT_IRQ(MX35, 1, 2, MX35_INT_GPIO2),
95 DEFINE_IMX_GPIO_PORT_IRQ(MX35, 2, 3, MX35_INT_GPIO3),
98 void __init mx35_init_irq(void)
100 mxc_init_irq(MX35_IO_ADDRESS(MX35_AVIC_BASE_ADDR));
101 mxc_gpio_init(imx35_gpio_ports, ARRAY_SIZE(imx35_gpio_ports));
103 #endif /* ifdef CONFIG_SOC_IMX35 */
105 #ifdef CONFIG_CACHE_L2X0
106 static int mxc_init_l2x0(void)
108 void __iomem *l2x0_base;
109 void __iomem *clkctl_base;
111 * First of all, we must repair broken chip settings. There are some
112 * i.MX35 CPUs in the wild, comming with bogus L2 cache settings. These
113 * misconfigured CPUs will run amok immediately when the L2 cache gets enabled.
114 * Workaraound is to setup the correct register setting prior enabling the
115 * L2 cache. This should not hurt already working CPUs, as they are using the
118 #define L2_MEM_VAL 0x10
120 clkctl_base = ioremap(MX35_CLKCTL_BASE_ADDR, 4096);
121 if (clkctl_base != NULL) {
122 writel(0x00000515, clkctl_base + L2_MEM_VAL);
123 iounmap(clkctl_base);
125 pr_err("L2 cache: Cannot fix timing. Trying to continue without\n");
128 l2x0_base = ioremap(MX3x_L2CC_BASE_ADDR, 4096);
129 if (IS_ERR(l2x0_base)) {
130 printk(KERN_ERR "remapping L2 cache area failed with %ld\n",
135 l2x0_init(l2x0_base, 0x00030024, 0x00000000);
140 arch_initcall(mxc_init_l2x0);