130 lines
3.5 KiB
C
130 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/***************************************************************************/
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/*
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* m5272.c -- platform support for ColdFire 5272 based boards
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*
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* Copyright (C) 1999-2002, Greg Ungerer (gerg@snapgear.com)
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* Copyright (C) 2001-2002, SnapGear Inc. (www.snapgear.com)
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*/
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/***************************************************************************/
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#include <linux/clkdev.h>
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#include <linux/kernel.h>
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#include <linux/param.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/phy.h>
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#include <linux/phy_fixed.h>
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#include <asm/machdep.h>
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#include <asm/coldfire.h>
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#include <asm/mcfsim.h>
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#include <asm/mcfuart.h>
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#include <asm/mcfclk.h>
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/***************************************************************************/
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/*
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* Some platforms need software versions of the GPIO data registers.
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*/
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unsigned short ppdata;
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unsigned char ledbank = 0xff;
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/***************************************************************************/
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DEFINE_CLK(pll, "pll.0", MCF_CLK);
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DEFINE_CLK(sys, "sys.0", MCF_BUSCLK);
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static struct clk_lookup m5272_clk_lookup[] = {
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CLKDEV_INIT(NULL, "pll.0", &clk_pll),
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CLKDEV_INIT(NULL, "sys.0", &clk_sys),
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CLKDEV_INIT("mcftmr.0", NULL, &clk_sys),
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CLKDEV_INIT("mcftmr.1", NULL, &clk_sys),
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CLKDEV_INIT("mcftmr.2", NULL, &clk_sys),
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CLKDEV_INIT("mcftmr.3", NULL, &clk_sys),
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CLKDEV_INIT("mcfuart.0", NULL, &clk_sys),
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CLKDEV_INIT("mcfuart.1", NULL, &clk_sys),
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CLKDEV_INIT("mcfqspi.0", NULL, &clk_sys),
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CLKDEV_INIT("fec.0", NULL, &clk_sys),
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};
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/***************************************************************************/
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static void __init m5272_uarts_init(void)
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{
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u32 v;
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/* Enable the output lines for the serial ports */
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v = readl(MCFSIM_PBCNT);
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v = (v & ~0x000000ff) | 0x00000055;
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writel(v, MCFSIM_PBCNT);
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v = readl(MCFSIM_PDCNT);
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v = (v & ~0x000003fc) | 0x000002a8;
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writel(v, MCFSIM_PDCNT);
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}
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/***************************************************************************/
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static void m5272_cpu_reset(void)
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{
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local_irq_disable();
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/* Set watchdog to reset, and enabled */
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__raw_writew(0, MCFSIM_WIRR);
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__raw_writew(1, MCFSIM_WRRR);
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__raw_writew(0, MCFSIM_WCR);
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for (;;)
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/* wait for watchdog to timeout */;
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}
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/***************************************************************************/
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void __init config_BSP(char *commandp, int size)
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{
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#if defined (CONFIG_MOD5272)
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/* Set base of device vectors to be 64 */
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writeb(0x40, MCFSIM_PIVR);
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#endif
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#if defined(CONFIG_NETtel) || defined(CONFIG_SCALES)
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/* Copy command line from FLASH to local buffer... */
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memcpy(commandp, (char *) 0xf0004000, size);
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commandp[size-1] = 0;
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#elif defined(CONFIG_CANCam)
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/* Copy command line from FLASH to local buffer... */
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memcpy(commandp, (char *) 0xf0010000, size);
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commandp[size-1] = 0;
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#endif
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mach_reset = m5272_cpu_reset;
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mach_sched_init = hw_timer_init;
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}
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/***************************************************************************/
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/*
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* Some 5272 based boards have the FEC ethernet directly connected to
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* an ethernet switch. In this case we need to use the fixed phy type,
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* and we need to declare it early in boot.
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*/
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static struct fixed_phy_status nettel_fixed_phy_status __initdata = {
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.link = 1,
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.speed = 100,
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.duplex = 0,
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};
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/***************************************************************************/
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static int __init init_BSP(void)
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{
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m5272_uarts_init();
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fixed_phy_add(PHY_POLL, 0, &nettel_fixed_phy_status);
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clkdev_add_table(m5272_clk_lookup, ARRAY_SIZE(m5272_clk_lookup));
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return 0;
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}
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arch_initcall(init_BSP);
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/***************************************************************************/
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