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linux-hardened/arch/m68k/platform/coldfire/m5441x.c
Steven King bea8bcb12d m68knommu: Add support for the Coldfire m5441x. 
Add support for the Coldfire 5441x (54410/54415/54416/54417/54418).  Currently
we only support noMMU mode.  It requires the PIT patch posted previously as it
uses the PIT instead of the dma timer as a clock source so we can get all that
GENERIC_CLOCKEVENTS goodness.  It also adds some simple clk definitions and
very simple minded power management.  The gpio code is tweeked and some
additional devices are added to devices.c.  The Makefile uses -mv4e as
apparently, the only difference a v4m (m5441x) and a v4e is the later has a
FPU, which I don't think should matter to us in the kernel.

Signed-off-by: Steven King <sfking@fdwdc.com>
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2012-07-16 09:59:21 +10:00

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/*
* m5441x.c -- support for Coldfire m5441x processors
*
* (C) Copyright Steven King <sfking@fdwdc.com>
*/
#include <linux/kernel.h>
#include <linux/param.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <asm/machdep.h>
#include <asm/coldfire.h>
#include <asm/mcfsim.h>
#include <asm/mcfuart.h>
#include <asm/mcfdma.h>
#include <asm/mcfclk.h>
DEFINE_CLK(0, "flexbus", 2, MCF_CLK);
DEFINE_CLK(0, "mcfcan.0", 8, MCF_CLK);
DEFINE_CLK(0, "mcfcan.1", 9, MCF_CLK);
DEFINE_CLK(0, "mcfi2c.1", 14, MCF_CLK);
DEFINE_CLK(0, "mcfdspi.1", 15, MCF_CLK);
DEFINE_CLK(0, "edma", 17, MCF_CLK);
DEFINE_CLK(0, "intc.0", 18, MCF_CLK);
DEFINE_CLK(0, "intc.1", 19, MCF_CLK);
DEFINE_CLK(0, "intc.2", 20, MCF_CLK);
DEFINE_CLK(0, "mcfi2c.0", 22, MCF_CLK);
DEFINE_CLK(0, "mcfdspi.0", 23, MCF_CLK);
DEFINE_CLK(0, "mcfuart.0", 24, MCF_BUSCLK);
DEFINE_CLK(0, "mcfuart.1", 25, MCF_BUSCLK);
DEFINE_CLK(0, "mcfuart.2", 26, MCF_BUSCLK);
DEFINE_CLK(0, "mcfuart.3", 27, MCF_BUSCLK);
DEFINE_CLK(0, "mcftmr.0", 28, MCF_CLK);
DEFINE_CLK(0, "mcftmr.1", 29, MCF_CLK);
DEFINE_CLK(0, "mcftmr.2", 30, MCF_CLK);
DEFINE_CLK(0, "mcftmr.3", 31, MCF_CLK);
DEFINE_CLK(0, "mcfpit.0", 32, MCF_CLK);
DEFINE_CLK(0, "mcfpit.1", 33, MCF_CLK);
DEFINE_CLK(0, "mcfpit.2", 34, MCF_CLK);
DEFINE_CLK(0, "mcfpit.3", 35, MCF_CLK);
DEFINE_CLK(0, "mcfeport.0", 37, MCF_CLK);
DEFINE_CLK(0, "mcfadc.0", 38, MCF_CLK);
DEFINE_CLK(0, "mcfdac.0", 39, MCF_CLK);
DEFINE_CLK(0, "mcfrtc.0", 42, MCF_CLK);
DEFINE_CLK(0, "mcfsim.0", 43, MCF_CLK);
DEFINE_CLK(0, "mcfusb-otg.0", 44, MCF_CLK);
DEFINE_CLK(0, "mcfusb-host.0", 45, MCF_CLK);
DEFINE_CLK(0, "mcfddr-sram.0", 46, MCF_CLK);
DEFINE_CLK(0, "mcfssi.0", 47, MCF_CLK);
DEFINE_CLK(0, "pll.0", 48, MCF_CLK);
DEFINE_CLK(0, "mcfrng.0", 49, MCF_CLK);
DEFINE_CLK(0, "mcfssi.1", 50, MCF_CLK);
DEFINE_CLK(0, "mcfsdhc.0", 51, MCF_CLK);
DEFINE_CLK(0, "enet-fec.0", 53, MCF_CLK);
DEFINE_CLK(0, "enet-fec.1", 54, MCF_CLK);
DEFINE_CLK(0, "switch.0", 55, MCF_CLK);
DEFINE_CLK(0, "switch.1", 56, MCF_CLK);
DEFINE_CLK(0, "nand.0", 63, MCF_CLK);
DEFINE_CLK(1, "mcfow.0", 2, MCF_CLK);
DEFINE_CLK(1, "mcfi2c.2", 4, MCF_CLK);
DEFINE_CLK(1, "mcfi2c.3", 5, MCF_CLK);
DEFINE_CLK(1, "mcfi2c.4", 6, MCF_CLK);
DEFINE_CLK(1, "mcfi2c.5", 7, MCF_CLK);
DEFINE_CLK(1, "mcfuart.4", 24, MCF_BUSCLK);
DEFINE_CLK(1, "mcfuart.5", 25, MCF_BUSCLK);
DEFINE_CLK(1, "mcfuart.6", 26, MCF_BUSCLK);
DEFINE_CLK(1, "mcfuart.7", 27, MCF_BUSCLK);
DEFINE_CLK(1, "mcfuart.8", 28, MCF_BUSCLK);
DEFINE_CLK(1, "mcfuart.9", 29, MCF_BUSCLK);
DEFINE_CLK(1, "mcfpwm.0", 34, MCF_BUSCLK);
DEFINE_CLK(1, "sys.0", 36, MCF_BUSCLK);
DEFINE_CLK(1, "gpio.0", 37, MCF_BUSCLK);
struct clk *mcf_clks[] = {
&__clk_0_2,
&__clk_0_8,
&__clk_0_9,
&__clk_0_14,
&__clk_0_15,
&__clk_0_17,
&__clk_0_18,
&__clk_0_19,
&__clk_0_20,
&__clk_0_22,
&__clk_0_23,
&__clk_0_24,
&__clk_0_25,
&__clk_0_26,
&__clk_0_27,
&__clk_0_28,
&__clk_0_29,
&__clk_0_30,
&__clk_0_31,
&__clk_0_32,
&__clk_0_33,
&__clk_0_34,
&__clk_0_35,
&__clk_0_37,
&__clk_0_38,
&__clk_0_39,
&__clk_0_42,
&__clk_0_43,
&__clk_0_44,
&__clk_0_45,
&__clk_0_46,
&__clk_0_47,
&__clk_0_48,
&__clk_0_49,
&__clk_0_50,
&__clk_0_51,
&__clk_0_53,
&__clk_0_54,
&__clk_0_55,
&__clk_0_56,
&__clk_0_63,
&__clk_1_2,
&__clk_1_4,
&__clk_1_5,
&__clk_1_6,
&__clk_1_7,
&__clk_1_24,
&__clk_1_25,
&__clk_1_26,
&__clk_1_27,
&__clk_1_28,
&__clk_1_29,
&__clk_1_34,
&__clk_1_36,
&__clk_1_37,
NULL,
};
static struct clk * const enable_clks[] __initconst = {
/* make sure these clocks are enabled */
&__clk_0_18, /* intc0 */
&__clk_0_19, /* intc0 */
&__clk_0_20, /* intc0 */
&__clk_0_24, /* uart0 */
&__clk_0_25, /* uart1 */
&__clk_0_26, /* uart2 */
&__clk_0_27, /* uart3 */
&__clk_0_33, /* pit.1 */
&__clk_0_37, /* eport */
&__clk_0_48, /* pll */
&__clk_1_36, /* CCM/reset module/Power management */
&__clk_1_37, /* gpio */
};
static struct clk * const disable_clks[] __initconst = {
&__clk_0_8, /* can.0 */
&__clk_0_9, /* can.1 */
&__clk_0_14, /* i2c.1 */
&__clk_0_15, /* dspi.1 */
&__clk_0_17, /* eDMA */
&__clk_0_22, /* i2c.0 */
&__clk_0_23, /* dspi.0 */
&__clk_0_28, /* tmr.1 */
&__clk_0_29, /* tmr.2 */
&__clk_0_30, /* tmr.2 */
&__clk_0_31, /* tmr.3 */
&__clk_0_32, /* pit.0 */
&__clk_0_34, /* pit.2 */
&__clk_0_35, /* pit.3 */
&__clk_0_38, /* adc */
&__clk_0_39, /* dac */
&__clk_0_44, /* usb otg */
&__clk_0_45, /* usb host */
&__clk_0_47, /* ssi.0 */
&__clk_0_49, /* rng */
&__clk_0_50, /* ssi.1 */
&__clk_0_51, /* eSDHC */
&__clk_0_53, /* enet-fec */
&__clk_0_54, /* enet-fec */
&__clk_0_55, /* switch.0 */
&__clk_0_56, /* switch.1 */
&__clk_1_2, /* 1-wire */
&__clk_1_4, /* i2c.2 */
&__clk_1_5, /* i2c.3 */
&__clk_1_6, /* i2c.4 */
&__clk_1_7, /* i2c.5 */
&__clk_1_24, /* uart 4 */
&__clk_1_25, /* uart 5 */
&__clk_1_26, /* uart 6 */
&__clk_1_27, /* uart 7 */
&__clk_1_28, /* uart 8 */
&__clk_1_29, /* uart 9 */
};
static void __init m5441x_clk_init(void)
{
unsigned i;
for (i = 0; i < ARRAY_SIZE(enable_clks); ++i)
__clk_init_enabled(enable_clks[i]);
/* make sure these clocks are disabled */
for (i = 0; i < ARRAY_SIZE(disable_clks); ++i)
__clk_init_disabled(disable_clks[i]);
}
static void __init m5441x_uarts_init(void)
{
__raw_writeb(0x0f, MCFGPIO_PAR_UART0);
__raw_writeb(0x00, MCFGPIO_PAR_UART1);
__raw_writeb(0x00, MCFGPIO_PAR_UART2);
}
static void __init m5441x_fec_init(void)
{
__raw_writeb(0x03, MCFGPIO_PAR_FEC);
}
void __init config_BSP(char *commandp, int size)
{
m5441x_clk_init();
mach_sched_init = hw_timer_init;
m5441x_uarts_init();
m5441x_fec_init();
}
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