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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-imx/mm-imx3.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-imx/mm-imx3.c')
-rw-r--r--arch/arm/mach-imx/mm-imx3.c263
1 files changed, 263 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/mm-imx3.c b/arch/arm/mach-imx/mm-imx3.c
new file mode 100644
index 00000000000..31807d2a8b7
--- /dev/null
+++ b/arch/arm/mach-imx/mm-imx3.c
@@ -0,0 +1,263 @@
+/*
+ * Copyright (C) 1999,2000 Arm Limited
+ * Copyright (C) 2000 Deep Blue Solutions Ltd
+ * Copyright (C) 2002 Shane Nay (shane@minirl.com)
+ * Copyright 2005-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ * - add MX31 specific definitions
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/mm.h>
+#include <linux/init.h>
+#include <linux/err.h>
+
+#include <asm/pgtable.h>
+#include <asm/hardware/cache-l2x0.h>
+#include <asm/mach/map.h>
+
+#include <mach/common.h>
+#include <mach/devices-common.h>
+#include <mach/hardware.h>
+#include <mach/iomux-v3.h>
+#include <mach/irqs.h>
+
+static void imx3_idle(void)
+{
+ unsigned long reg = 0;
+
+ if (!need_resched())
+ __asm__ __volatile__(
+ /* disable I and D cache */
+ "mrc p15, 0, %0, c1, c0, 0\n"
+ "bic %0, %0, #0x00001000\n"
+ "bic %0, %0, #0x00000004\n"
+ "mcr p15, 0, %0, c1, c0, 0\n"
+ /* invalidate I cache */
+ "mov %0, #0\n"
+ "mcr p15, 0, %0, c7, c5, 0\n"
+ /* clear and invalidate D cache */
+ "mov %0, #0\n"
+ "mcr p15, 0, %0, c7, c14, 0\n"
+ /* WFI */
+ "mov %0, #0\n"
+ "mcr p15, 0, %0, c7, c0, 4\n"
+ "nop\n" "nop\n" "nop\n" "nop\n"
+ "nop\n" "nop\n" "nop\n"
+ /* enable I and D cache */
+ "mrc p15, 0, %0, c1, c0, 0\n"
+ "orr %0, %0, #0x00001000\n"
+ "orr %0, %0, #0x00000004\n"
+ "mcr p15, 0, %0, c1, c0, 0\n"
+ : "=r" (reg));
+ local_irq_enable();
+}
+
+static void __iomem *imx3_ioremap(unsigned long phys_addr, size_t size,
+ unsigned int mtype)
+{
+ if (mtype == MT_DEVICE) {
+ /*
+ * Access all peripherals below 0x80000000 as nonshared device
+ * on mx3, but leave l2cc alone. Otherwise cache corruptions
+ * can occur.
+ */
+ if (phys_addr < 0x80000000 &&
+ !addr_in_module(phys_addr, MX3x_L2CC))
+ mtype = MT_DEVICE_NONSHARED;
+ }
+
+ return __arm_ioremap(phys_addr, size, mtype);
+}
+
+void imx3_init_l2x0(void)
+{
+ void __iomem *l2x0_base;
+ void __iomem *clkctl_base;
+
+/*
+ * First of all, we must repair broken chip settings. There are some
+ * i.MX35 CPUs in the wild, comming with bogus L2 cache settings. These
+ * misconfigured CPUs will run amok immediately when the L2 cache gets enabled.
+ * Workaraound is to setup the correct register setting prior enabling the
+ * L2 cache. This should not hurt already working CPUs, as they are using the
+ * same value.
+ */
+#define L2_MEM_VAL 0x10
+
+ clkctl_base = ioremap(MX35_CLKCTL_BASE_ADDR, 4096);
+ if (clkctl_base != NULL) {
+ writel(0x00000515, clkctl_base + L2_MEM_VAL);
+ iounmap(clkctl_base);
+ } else {
+ pr_err("L2 cache: Cannot fix timing. Trying to continue without\n");
+ }
+
+ l2x0_base = ioremap(MX3x_L2CC_BASE_ADDR, 4096);
+ if (IS_ERR(l2x0_base)) {
+ printk(KERN_ERR "remapping L2 cache area failed with %ld\n",
+ PTR_ERR(l2x0_base));
+ return;
+ }
+
+ l2x0_init(l2x0_base, 0x00030024, 0x00000000);
+}
+
+#ifdef CONFIG_SOC_IMX31
+static struct map_desc mx31_io_desc[] __initdata = {
+ imx_map_entry(MX31, X_MEMC, MT_DEVICE),
+ imx_map_entry(MX31, AVIC, MT_DEVICE_NONSHARED),
+ imx_map_entry(MX31, AIPS1, MT_DEVICE_NONSHARED),
+ imx_map_entry(MX31, AIPS2, MT_DEVICE_NONSHARED),
+ imx_map_entry(MX31, SPBA0, MT_DEVICE_NONSHARED),
+};
+
+/*
+ * This function initializes the memory map. It is called during the
+ * system startup to create static physical to virtual memory mappings
+ * for the IO modules.
+ */
+void __init mx31_map_io(void)
+{
+ iotable_init(mx31_io_desc, ARRAY_SIZE(mx31_io_desc));
+}
+
+void __init imx31_init_early(void)
+{
+ mxc_set_cpu_type(MXC_CPU_MX31);
+ mxc_arch_reset_init(MX31_IO_ADDRESS(MX31_WDOG_BASE_ADDR));
+ pm_idle = imx3_idle;
+ imx_ioremap = imx3_ioremap;
+}
+
+void __init mx31_init_irq(void)
+{
+ mxc_init_irq(MX31_IO_ADDRESS(MX31_AVIC_BASE_ADDR));
+}
+
+static struct sdma_script_start_addrs imx31_to1_sdma_script __initdata = {
+ .per_2_per_addr = 1677,
+};
+
+static struct sdma_script_start_addrs imx31_to2_sdma_script __initdata = {
+ .ap_2_ap_addr = 423,
+ .ap_2_bp_addr = 829,
+ .bp_2_ap_addr = 1029,
+};
+
+static struct sdma_platform_data imx31_sdma_pdata __initdata = {
+ .fw_name = "sdma-imx31-to2.bin",
+ .script_addrs = &imx31_to2_sdma_script,
+};
+
+void __init imx31_soc_init(void)
+{
+ int to_version = mx31_revision() >> 4;
+
+ imx3_init_l2x0();
+
+ mxc_register_gpio("imx31-gpio", 0, MX31_GPIO1_BASE_ADDR, SZ_16K, MX31_INT_GPIO1, 0);
+ mxc_register_gpio("imx31-gpio", 1, MX31_GPIO2_BASE_ADDR, SZ_16K, MX31_INT_GPIO2, 0);
+ mxc_register_gpio("imx31-gpio", 2, MX31_GPIO3_BASE_ADDR, SZ_16K, MX31_INT_GPIO3, 0);
+
+ if (to_version == 1) {
+ strncpy(imx31_sdma_pdata.fw_name, "sdma-imx31-to1.bin",
+ strlen(imx31_sdma_pdata.fw_name));
+ imx31_sdma_pdata.script_addrs = &imx31_to1_sdma_script;
+ }
+
+ imx_add_imx_sdma("imx31-sdma", MX31_SDMA_BASE_ADDR, MX31_INT_SDMA, &imx31_sdma_pdata);
+}
+#endif /* ifdef CONFIG_SOC_IMX31 */
+
+#ifdef CONFIG_SOC_IMX35
+static struct map_desc mx35_io_desc[] __initdata = {
+ imx_map_entry(MX35, X_MEMC, MT_DEVICE),
+ imx_map_entry(MX35, AVIC, MT_DEVICE_NONSHARED),
+ imx_map_entry(MX35, AIPS1, MT_DEVICE_NONSHARED),
+ imx_map_entry(MX35, AIPS2, MT_DEVICE_NONSHARED),
+ imx_map_entry(MX35, SPBA0, MT_DEVICE_NONSHARED),
+};
+
+void __init mx35_map_io(void)
+{
+ iotable_init(mx35_io_desc, ARRAY_SIZE(mx35_io_desc));
+}
+
+void __init imx35_init_early(void)
+{
+ mxc_set_cpu_type(MXC_CPU_MX35);
+ mxc_iomux_v3_init(MX35_IO_ADDRESS(MX35_IOMUXC_BASE_ADDR));
+ mxc_arch_reset_init(MX35_IO_ADDRESS(MX35_WDOG_BASE_ADDR));
+ pm_idle = imx3_idle;
+ imx_ioremap = imx3_ioremap;
+}
+
+void __init mx35_init_irq(void)
+{
+ mxc_init_irq(MX35_IO_ADDRESS(MX35_AVIC_BASE_ADDR));
+}
+
+static struct sdma_script_start_addrs imx35_to1_sdma_script __initdata = {
+ .ap_2_ap_addr = 642,
+ .uart_2_mcu_addr = 817,
+ .mcu_2_app_addr = 747,
+ .uartsh_2_mcu_addr = 1183,
+ .per_2_shp_addr = 1033,
+ .mcu_2_shp_addr = 961,
+ .ata_2_mcu_addr = 1333,
+ .mcu_2_ata_addr = 1252,
+ .app_2_mcu_addr = 683,
+ .shp_2_per_addr = 1111,
+ .shp_2_mcu_addr = 892,
+};
+
+static struct sdma_script_start_addrs imx35_to2_sdma_script __initdata = {
+ .ap_2_ap_addr = 729,
+ .uart_2_mcu_addr = 904,
+ .per_2_app_addr = 1597,
+ .mcu_2_app_addr = 834,
+ .uartsh_2_mcu_addr = 1270,
+ .per_2_shp_addr = 1120,
+ .mcu_2_shp_addr = 1048,
+ .ata_2_mcu_addr = 1429,
+ .mcu_2_ata_addr = 1339,
+ .app_2_per_addr = 1531,
+ .app_2_mcu_addr = 770,
+ .shp_2_per_addr = 1198,
+ .shp_2_mcu_addr = 979,
+};
+
+static struct sdma_platform_data imx35_sdma_pdata __initdata = {
+ .fw_name = "sdma-imx35-to2.bin",
+ .script_addrs = &imx35_to2_sdma_script,
+};
+
+void __init imx35_soc_init(void)
+{
+ int to_version = mx35_revision() >> 4;
+
+ imx3_init_l2x0();
+
+ /* i.mx35 has the i.mx31 type gpio */
+ mxc_register_gpio("imx31-gpio", 0, MX35_GPIO1_BASE_ADDR, SZ_16K, MX35_INT_GPIO1, 0);
+ mxc_register_gpio("imx31-gpio", 1, MX35_GPIO2_BASE_ADDR, SZ_16K, MX35_INT_GPIO2, 0);
+ mxc_register_gpio("imx31-gpio", 2, MX35_GPIO3_BASE_ADDR, SZ_16K, MX35_INT_GPIO3, 0);
+
+ if (to_version == 1) {
+ strncpy(imx35_sdma_pdata.fw_name, "sdma-imx35-to1.bin",
+ strlen(imx35_sdma_pdata.fw_name));
+ imx35_sdma_pdata.script_addrs = &imx35_to1_sdma_script;
+ }
+
+ imx_add_imx_sdma("imx35-sdma", MX35_SDMA_BASE_ADDR, MX35_INT_SDMA, &imx35_sdma_pdata);
+}
+#endif /* ifdef CONFIG_SOC_IMX35 */