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u-boot/arch/arm/mach-davinci/cpu.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

220 lines
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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2004 Texas Instruments.
* Copyright (C) 2009 David Brownell
*/
#include <common.h>
#include <netdev.h>
#include <asm/arch/hardware.h>
#include <asm/io.h>
DECLARE_GLOBAL_DATA_PTR;
/* offsets from PLL controller base */
#define PLLC_PLLCTL 0x100
#define PLLC_PLLM 0x110
#define PLLC_PREDIV 0x114
#define PLLC_PLLDIV1 0x118
#define PLLC_PLLDIV2 0x11c
#define PLLC_PLLDIV3 0x120
#define PLLC_POSTDIV 0x128
#define PLLC_BPDIV 0x12c
#define PLLC_PLLDIV4 0x160
#define PLLC_PLLDIV5 0x164
#define PLLC_PLLDIV6 0x168
#define PLLC_PLLDIV7 0x16c
#define PLLC_PLLDIV8 0x170
#define PLLC_PLLDIV9 0x174
/* SOC-specific pll info */
#ifdef CONFIG_SOC_DM355
#define ARM_PLLDIV PLLC_PLLDIV1
#define DDR_PLLDIV PLLC_PLLDIV1
#endif
#ifdef CONFIG_SOC_DM644X
#define ARM_PLLDIV PLLC_PLLDIV2
#define DSP_PLLDIV PLLC_PLLDIV1
#define DDR_PLLDIV PLLC_PLLDIV2
#endif
#ifdef CONFIG_SOC_DM646X
#define DSP_PLLDIV PLLC_PLLDIV1
#define ARM_PLLDIV PLLC_PLLDIV2
#define DDR_PLLDIV PLLC_PLLDIV1
#endif
#ifdef CONFIG_SOC_DA8XX
unsigned int sysdiv[9] = {
PLLC_PLLDIV1, PLLC_PLLDIV2, PLLC_PLLDIV3, PLLC_PLLDIV4, PLLC_PLLDIV5,
PLLC_PLLDIV6, PLLC_PLLDIV7, PLLC_PLLDIV8, PLLC_PLLDIV9
};
int clk_get(enum davinci_clk_ids id)
{
int pre_div;
int pllm;
int post_div;
int pll_out;
unsigned int pll_base;
pll_out = CONFIG_SYS_OSCIN_FREQ;
if (id == DAVINCI_AUXCLK_CLKID)
goto out;
if ((id >> 16) == 1)
pll_base = (unsigned int)davinci_pllc1_regs;
else
pll_base = (unsigned int)davinci_pllc0_regs;
id &= 0xFFFF;
/*
* Lets keep this simple. Combining operations can result in
* unexpected approximations
*/
pre_div = (readl(pll_base + PLLC_PREDIV) &
DAVINCI_PLLC_DIV_MASK) + 1;
pllm = readl(pll_base + PLLC_PLLM) + 1;
pll_out /= pre_div;
pll_out *= pllm;
if (id == DAVINCI_PLLM_CLKID)
goto out;
post_div = (readl(pll_base + PLLC_POSTDIV) &
DAVINCI_PLLC_DIV_MASK) + 1;
pll_out /= post_div;
if (id == DAVINCI_PLLC_CLKID)
goto out;
pll_out /= (readl(pll_base + sysdiv[id - 1]) &
DAVINCI_PLLC_DIV_MASK) + 1;
out:
return pll_out;
}
int set_cpu_clk_info(void)
{
gd->bd->bi_arm_freq = clk_get(DAVINCI_ARM_CLKID) / 1000000;
/* DDR PHY uses an x2 input clock */
gd->bd->bi_ddr_freq = cpu_is_da830() ? 0 :
(clk_get(DAVINCI_DDR_CLKID) / 1000000);
gd->bd->bi_dsp_freq = 0;
return 0;
}
#else /* CONFIG_SOC_DA8XX */
static unsigned pll_div(volatile void *pllbase, unsigned offset)
{
u32 div;
div = REG(pllbase + offset);
return (div & BIT(15)) ? (1 + (div & 0x1f)) : 1;
}
static inline unsigned pll_prediv(volatile void *pllbase)
{
#ifdef CONFIG_SOC_DM355
/* this register read seems to fail on pll0 */
if (pllbase == (volatile void *)DAVINCI_PLL_CNTRL0_BASE)
return 8;
else
return pll_div(pllbase, PLLC_PREDIV);
#elif defined(CONFIG_SOC_DM365)
return pll_div(pllbase, PLLC_PREDIV);
#endif
return 1;
}
static inline unsigned pll_postdiv(volatile void *pllbase)
{
#if defined(CONFIG_SOC_DM355) || defined(CONFIG_SOC_DM365)
return pll_div(pllbase, PLLC_POSTDIV);
#elif defined(CONFIG_SOC_DM6446)
if (pllbase == (volatile void *)DAVINCI_PLL_CNTRL0_BASE)
return pll_div(pllbase, PLLC_POSTDIV);
#endif
return 1;
}
static unsigned pll_sysclk_mhz(unsigned pll_addr, unsigned div)
{
volatile void *pllbase = (volatile void *) pll_addr;
#ifdef CONFIG_SOC_DM646X
unsigned base = CONFIG_REFCLK_FREQ / 1000;
#else
unsigned base = CONFIG_SYS_HZ_CLOCK / 1000;
#endif
/* the PLL might be bypassed */
if (readl(pllbase + PLLC_PLLCTL) & BIT(0)) {
base /= pll_prediv(pllbase);
#if defined(CONFIG_SOC_DM365)
base *= 2 * (readl(pllbase + PLLC_PLLM) & 0x0ff);
#else
base *= 1 + (REG(pllbase + PLLC_PLLM) & 0x0ff);
#endif
base /= pll_postdiv(pllbase);
}
return DIV_ROUND_UP(base, 1000 * pll_div(pllbase, div));
}
#ifdef DAVINCI_DM6467EVM
unsigned int davinci_arm_clk_get()
{
return pll_sysclk_mhz(DAVINCI_PLL_CNTRL0_BASE, ARM_PLLDIV) * 1000000;
}
#endif
#if defined(CONFIG_SOC_DM365)
unsigned int davinci_clk_get(unsigned int div)
{
return pll_sysclk_mhz(DAVINCI_PLL_CNTRL0_BASE, div) * 1000000;
}
#endif
int set_cpu_clk_info(void)
{
unsigned int pllbase = DAVINCI_PLL_CNTRL0_BASE;
#if defined(CONFIG_SOC_DM365)
pllbase = DAVINCI_PLL_CNTRL1_BASE;
#endif
gd->bd->bi_arm_freq = pll_sysclk_mhz(pllbase, ARM_PLLDIV);
#ifdef DSP_PLLDIV
gd->bd->bi_dsp_freq =
pll_sysclk_mhz(DAVINCI_PLL_CNTRL0_BASE, DSP_PLLDIV);
#else
gd->bd->bi_dsp_freq = 0;
#endif
pllbase = DAVINCI_PLL_CNTRL1_BASE;
#if defined(CONFIG_SOC_DM365)
pllbase = DAVINCI_PLL_CNTRL0_BASE;
#endif
gd->bd->bi_ddr_freq = pll_sysclk_mhz(pllbase, DDR_PLLDIV) / 2;
return 0;
}
#endif /* !CONFIG_SOC_DA8XX */
/*
* Initializes on-chip ethernet controllers.
* to override, implement board_eth_init()
*/
int cpu_eth_init(bd_t *bis)
{
#if defined(CONFIG_DRIVER_TI_EMAC)
davinci_emac_initialize();
#endif
return 0;
}
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