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#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/bug.h>
#include <linux/of_platform.h>
#include <linux/clocksource.h>
#include <linux/clk-provider.h>
#include <linux/clk.h>
#include <linux/slab.h>
#include <linux/gfp.h>
#include <linux/reset.h>
#include <asm/mach-types.h>
#include <asm/mach/map.h>
#include <asm/mach/arch.h>
#include <asm/page.h>
#include <mach/iomap.h>
#include <mach/hardware.h>
#include <mach/utils.h>
#include <mach/smp.h>
static struct map_desc ox820_io_desc[] __initdata = {
{
.virtual = (unsigned long)OXNAS_PERCPU_BASE_VA,
.pfn = __phys_to_pfn(OXNAS_PERCPU_BASE),
.length = OXNAS_PERCPU_SIZE,
.type = MT_DEVICE,
},
{
.virtual = (unsigned long)OXNAS_SYSCRTL_BASE_VA,
.pfn = __phys_to_pfn(OXNAS_SYSCRTL_BASE),
.length = OXNAS_SYSCRTL_SIZE,
.type = MT_DEVICE,
},
{
.virtual = (unsigned long)OXNAS_SECCRTL_BASE_VA,
.pfn = __phys_to_pfn(OXNAS_SECCRTL_BASE),
.length = OXNAS_SECCRTL_SIZE,
.type = MT_DEVICE,
},
{
.virtual = (unsigned long)OXNAS_RPSA_BASE_VA,
.pfn = __phys_to_pfn(OXNAS_RPSA_BASE),
.length = OXNAS_RPSA_SIZE,
.type = MT_DEVICE,
},
{
.virtual = (unsigned long)OXNAS_RPSC_BASE_VA,
.pfn = __phys_to_pfn(OXNAS_RPSC_BASE),
.length = OXNAS_RPSC_SIZE,
.type = MT_DEVICE,
},
};
void __init ox820_map_common_io(void)
{
debug_ll_io_init();
iotable_init(ox820_io_desc, ARRAY_SIZE(ox820_io_desc));
}
static void __init ox820_dt_init(void)
{
int ret;
ret = of_platform_populate(NULL, of_default_bus_match_table, NULL,
NULL);
if (ret) {
pr_err("of_platform_populate failed: %d\n", ret);
BUG();
}
}
static void __init ox820_timer_init(void)
{
of_clk_init(NULL);
clocksource_of_init();
}
void ox820_init_early(void)
{
}
void ox820_assert_system_reset(enum reboot_mode mode, const char *cmd)
{
u32 value;
/* Assert reset to cores as per power on defaults
* Don't touch the DDR interface as things will come to an impromptu stop
* NB Possibly should be asserting reset for PLLB, but there are timing
* concerns here according to the docs */
value = BIT(SYS_CTRL_RST_COPRO) |
BIT(SYS_CTRL_RST_USBHS) |
BIT(SYS_CTRL_RST_USBHSPHYA) |
BIT(SYS_CTRL_RST_MACA) |
BIT(SYS_CTRL_RST_PCIEA) |
BIT(SYS_CTRL_RST_SGDMA) |
BIT(SYS_CTRL_RST_CIPHER) |
BIT(SYS_CTRL_RST_SATA) |
BIT(SYS_CTRL_RST_SATA_LINK) |
BIT(SYS_CTRL_RST_SATA_PHY) |
BIT(SYS_CTRL_RST_PCIEPHY) |
BIT(SYS_CTRL_RST_STATIC) |
BIT(SYS_CTRL_RST_UART1) |
BIT(SYS_CTRL_RST_UART2) |
BIT(SYS_CTRL_RST_MISC) |
BIT(SYS_CTRL_RST_I2S) |
BIT(SYS_CTRL_RST_SD) |
BIT(SYS_CTRL_RST_MACB) |
BIT(SYS_CTRL_RST_PCIEB) |
BIT(SYS_CTRL_RST_VIDEO) |
BIT(SYS_CTRL_RST_USBHSPHYB) |
BIT(SYS_CTRL_RST_USBDEV);
writel(value, SYS_CTRL_RST_SET_CTRL);
/* Release reset to cores as per power on defaults */
writel(BIT(SYS_CTRL_RST_GPIO), SYS_CTRL_RST_CLR_CTRL);
/* Disable clocks to cores as per power-on defaults - must leave DDR
* related clocks enabled otherwise we'll stop rather abruptly. */
value =
BIT(SYS_CTRL_CLK_COPRO) |
BIT(SYS_CTRL_CLK_DMA) |
BIT(SYS_CTRL_CLK_CIPHER) |
BIT(SYS_CTRL_CLK_SD) |
BIT(SYS_CTRL_CLK_SATA) |
BIT(SYS_CTRL_CLK_I2S) |
BIT(SYS_CTRL_CLK_USBHS) |
BIT(SYS_CTRL_CLK_MAC) |
BIT(SYS_CTRL_CLK_PCIEA) |
BIT(SYS_CTRL_CLK_STATIC) |
BIT(SYS_CTRL_CLK_MACB) |
BIT(SYS_CTRL_CLK_PCIEB) |
BIT(SYS_CTRL_CLK_REF600) |
BIT(SYS_CTRL_CLK_USBDEV);
writel(value, SYS_CTRL_CLK_CLR_CTRL);
/* Enable clocks to cores as per power-on defaults */
/* Set sys-control pin mux'ing as per power-on defaults */
writel(0, SYS_CTRL_SECONDARY_SEL);
writel(0, SYS_CTRL_TERTIARY_SEL);
writel(0, SYS_CTRL_QUATERNARY_SEL);
writel(0, SYS_CTRL_DEBUG_SEL);
writel(0, SYS_CTRL_ALTERNATIVE_SEL);
writel(0, SYS_CTRL_PULLUP_SEL);
writel(0, SYS_CTRL_SECONDARY_SEL);
writel(0, SYS_CTRL_TERTIARY_SEL);
writel(0, SYS_CTRL_QUATERNARY_SEL);
writel(0, SYS_CTRL_DEBUG_SEL);
writel(0, SYS_CTRL_ALTERNATIVE_SEL);
writel(0, SYS_CTRL_PULLUP_SEL);
/* No need to save any state, as the ROM loader can determine whether
* reset is due to power cycling or programatic action, just hit the
* (self-clearing) CPU reset bit of the block reset register */
value =
BIT(SYS_CTRL_RST_SCU) |
BIT(SYS_CTRL_RST_ARM0) |
BIT(SYS_CTRL_RST_ARM1);
writel(value, SYS_CTRL_RST_SET_CTRL);
}
static const char * const ox820_dt_board_compat[] = {
"plxtech,nas7820",
"plxtech,nas7821",
"plxtech,nas7825",
NULL
};
DT_MACHINE_START(OX820_DT, "PLXTECH NAS782X SoC (Flattened Device Tree)")
.map_io = ox820_map_common_io,
.smp = smp_ops(ox820_smp_ops),
.init_early = ox820_init_early,
.init_time = ox820_timer_init,
.init_machine = ox820_dt_init,
.restart = ox820_assert_system_reset,
.dt_compat = ox820_dt_board_compat,
MACHINE_END
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