cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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m5272.c (3611B)

      1// SPDX-License-Identifier: GPL-2.0
      2/***************************************************************************/
      3
      4/*
      5 *	m5272.c  -- platform support for ColdFire 5272 based boards
      6 *
      7 *	Copyright (C) 1999-2002, Greg Ungerer (gerg@snapgear.com)
      8 *	Copyright (C) 2001-2002, SnapGear Inc. (www.snapgear.com)
      9 */
     10
     11/***************************************************************************/
     12
     13#include <linux/clkdev.h>
     14#include <linux/kernel.h>
     15#include <linux/param.h>
     16#include <linux/init.h>
     17#include <linux/io.h>
     18#include <linux/phy.h>
     19#include <linux/phy_fixed.h>
     20#include <asm/machdep.h>
     21#include <asm/coldfire.h>
     22#include <asm/mcfsim.h>
     23#include <asm/mcfuart.h>
     24#include <asm/mcfclk.h>
     25
     26/***************************************************************************/
     27
     28/*
     29 *	Some platforms need software versions of the GPIO data registers.
     30 */
     31unsigned short ppdata;
     32unsigned char ledbank = 0xff;
     33
     34/***************************************************************************/
     35
     36DEFINE_CLK(pll, "pll.0", MCF_CLK);
     37DEFINE_CLK(sys, "sys.0", MCF_BUSCLK);
     38
     39static struct clk_lookup m5272_clk_lookup[] = {
     40	CLKDEV_INIT(NULL, "pll.0", &clk_pll),
     41	CLKDEV_INIT(NULL, "sys.0", &clk_sys),
     42	CLKDEV_INIT("mcftmr.0", NULL, &clk_sys),
     43	CLKDEV_INIT("mcftmr.1", NULL, &clk_sys),
     44	CLKDEV_INIT("mcftmr.2", NULL, &clk_sys),
     45	CLKDEV_INIT("mcftmr.3", NULL, &clk_sys),
     46	CLKDEV_INIT("mcfuart.0", NULL, &clk_sys),
     47	CLKDEV_INIT("mcfuart.1", NULL, &clk_sys),
     48	CLKDEV_INIT("mcfqspi.0", NULL, &clk_sys),
     49	CLKDEV_INIT("fec.0", NULL, &clk_sys),
     50};
     51
     52/***************************************************************************/
     53
     54static void __init m5272_uarts_init(void)
     55{
     56	u32 v;
     57
     58	/* Enable the output lines for the serial ports */
     59	v = readl(MCFSIM_PBCNT);
     60	v = (v & ~0x000000ff) | 0x00000055;
     61	writel(v, MCFSIM_PBCNT);
     62
     63	v = readl(MCFSIM_PDCNT);
     64	v = (v & ~0x000003fc) | 0x000002a8;
     65	writel(v, MCFSIM_PDCNT);
     66}
     67
     68/***************************************************************************/
     69
     70static void m5272_cpu_reset(void)
     71{
     72	local_irq_disable();
     73	/* Set watchdog to reset, and enabled */
     74	__raw_writew(0, MCFSIM_WIRR);
     75	__raw_writew(1, MCFSIM_WRRR);
     76	__raw_writew(0, MCFSIM_WCR);
     77	for (;;)
     78		/* wait for watchdog to timeout */;
     79}
     80
     81/***************************************************************************/
     82
     83void __init config_BSP(char *commandp, int size)
     84{
     85#if defined (CONFIG_MOD5272)
     86	/* Set base of device vectors to be 64 */
     87	writeb(0x40, MCFSIM_PIVR);
     88#endif
     89
     90#if defined(CONFIG_NETtel) || defined(CONFIG_SCALES)
     91	/* Copy command line from FLASH to local buffer... */
     92	memcpy(commandp, (char *) 0xf0004000, size);
     93	commandp[size-1] = 0;
     94#elif defined(CONFIG_CANCam)
     95	/* Copy command line from FLASH to local buffer... */
     96	memcpy(commandp, (char *) 0xf0010000, size);
     97	commandp[size-1] = 0;
     98#endif
     99
    100	mach_reset = m5272_cpu_reset;
    101	mach_sched_init = hw_timer_init;
    102}
    103
    104/***************************************************************************/
    105
    106/*
    107 * Some 5272 based boards have the FEC ethernet directly connected to
    108 * an ethernet switch. In this case we need to use the fixed phy type,
    109 * and we need to declare it early in boot.
    110 */
    111static struct fixed_phy_status nettel_fixed_phy_status __initdata = {
    112	.link	= 1,
    113	.speed	= 100,
    114	.duplex	= 0,
    115};
    116
    117/***************************************************************************/
    118
    119static int __init init_BSP(void)
    120{
    121	m5272_uarts_init();
    122	fixed_phy_add(PHY_POLL, 0, &nettel_fixed_phy_status);
    123	clkdev_add_table(m5272_clk_lookup, ARRAY_SIZE(m5272_clk_lookup));
    124	return 0;
    125}
    126
    127arch_initcall(init_BSP);
    128
    129/***************************************************************************/