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u-boot/arch/arm/cpu/arm926ejs/mx27/generic.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

384 lines
8.4 KiB
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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2008 Eric Jarrige <eric.jarrige@armadeus.org>
* Copyright (c) 2009 Ilya Yanok <yanok@emcraft.com>
*/
#include <common.h>
#include <div64.h>
#include <netdev.h>
#include <asm/io.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/clock.h>
#include <asm/arch/gpio.h>
#include <asm/mach-imx/sys_proto.h>
#ifdef CONFIG_MMC_MXC
#include <asm/arch/mxcmmc.h>
#endif
/*
* get the system pll clock in Hz
*
* mfi + mfn / (mfd +1)
* f = 2 * f_ref * --------------------
* pd + 1
*/
static unsigned int imx_decode_pll(unsigned int pll, unsigned int f_ref)
{
unsigned int mfi = (pll >> 10) & 0xf;
unsigned int mfn = pll & 0x3ff;
unsigned int mfd = (pll >> 16) & 0x3ff;
unsigned int pd = (pll >> 26) & 0xf;
mfi = mfi <= 5 ? 5 : mfi;
return lldiv(2 * (u64)f_ref * (mfi * (mfd + 1) + mfn),
(mfd + 1) * (pd + 1));
}
static ulong clk_in_32k(void)
{
return 1024 * CONFIG_MX27_CLK32;
}
static ulong clk_in_26m(void)
{
struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
if (readl(&pll->cscr) & CSCR_OSC26M_DIV1P5) {
/* divide by 1.5 */
return 26000000 * 2 / 3;
} else {
return 26000000;
}
}
static ulong imx_get_mpllclk(void)
{
struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
ulong cscr = readl(&pll->cscr);
ulong fref;
if (cscr & CSCR_MCU_SEL)
fref = clk_in_26m();
else
fref = clk_in_32k();
return imx_decode_pll(readl(&pll->mpctl0), fref);
}
static ulong imx_get_armclk(void)
{
struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
ulong cscr = readl(&pll->cscr);
ulong fref = imx_get_mpllclk();
ulong div;
if (!(cscr & CSCR_ARM_SRC_MPLL))
fref = lldiv((fref * 2), 3);
div = ((cscr >> 12) & 0x3) + 1;
return lldiv(fref, div);
}
static ulong imx_get_ahbclk(void)
{
struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
ulong cscr = readl(&pll->cscr);
ulong fref = imx_get_mpllclk();
ulong div;
div = ((cscr >> 8) & 0x3) + 1;
return lldiv(fref * 2, 3 * div);
}
static __attribute__((unused)) ulong imx_get_spllclk(void)
{
struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
ulong cscr = readl(&pll->cscr);
ulong fref;
if (cscr & CSCR_SP_SEL)
fref = clk_in_26m();
else
fref = clk_in_32k();
return imx_decode_pll(readl(&pll->spctl0), fref);
}
static ulong imx_decode_perclk(ulong div)
{
return lldiv((imx_get_mpllclk() * 2), (div * 3));
}
static ulong imx_get_perclk1(void)
{
struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
return imx_decode_perclk((readl(&pll->pcdr1) & 0x3f) + 1);
}
static ulong imx_get_perclk2(void)
{
struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
return imx_decode_perclk(((readl(&pll->pcdr1) >> 8) & 0x3f) + 1);
}
static __attribute__((unused)) ulong imx_get_perclk3(void)
{
struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
return imx_decode_perclk(((readl(&pll->pcdr1) >> 16) & 0x3f) + 1);
}
static __attribute__((unused)) ulong imx_get_perclk4(void)
{
struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
return imx_decode_perclk(((readl(&pll->pcdr1) >> 24) & 0x3f) + 1);
}
unsigned int mxc_get_clock(enum mxc_clock clk)
{
switch (clk) {
case MXC_ARM_CLK:
return imx_get_armclk();
case MXC_I2C_CLK:
return imx_get_ahbclk()/2;
case MXC_UART_CLK:
return imx_get_perclk1();
case MXC_FEC_CLK:
return imx_get_ahbclk();
case MXC_ESDHC_CLK:
return imx_get_perclk2();
}
return -1;
}
u32 get_cpu_rev(void)
{
return MXC_CPU_MX27 << 12;
}
#if defined(CONFIG_DISPLAY_CPUINFO)
int print_cpuinfo (void)
{
char buf[32];
printf("CPU: Freescale i.MX27 at %s MHz\n\n",
strmhz(buf, imx_get_mpllclk()));
return 0;
}
#endif
int cpu_eth_init(bd_t *bis)
{
#if defined(CONFIG_FEC_MXC)
struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
/* enable FEC clock */
writel(readl(&pll->pccr1) | PCCR1_HCLK_FEC, &pll->pccr1);
writel(readl(&pll->pccr0) | PCCR0_FEC_EN, &pll->pccr0);
return fecmxc_initialize(bis);
#else
return 0;
#endif
}
/*
* Initializes on-chip MMC controllers.
* to override, implement board_mmc_init()
*/
int cpu_mmc_init(bd_t *bis)
{
#ifdef CONFIG_MMC_MXC
return mxc_mmc_init(bis);
#else
return 0;
#endif
}
void imx_gpio_mode(int gpio_mode)
{
struct gpio_port_regs *regs = (struct gpio_port_regs *)IMX_GPIO_BASE;
unsigned int pin = gpio_mode & GPIO_PIN_MASK;
unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT;
unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> GPIO_OCR_SHIFT;
unsigned int aout = (gpio_mode & GPIO_AOUT_MASK) >> GPIO_AOUT_SHIFT;
unsigned int bout = (gpio_mode & GPIO_BOUT_MASK) >> GPIO_BOUT_SHIFT;
unsigned int tmp;
/* Pullup enable */
if (gpio_mode & GPIO_PUEN) {
writel(readl(&regs->port[port].puen) | (1 << pin),
&regs->port[port].puen);
} else {
writel(readl(&regs->port[port].puen) & ~(1 << pin),
&regs->port[port].puen);
}
/* Data direction */
if (gpio_mode & GPIO_OUT) {
writel(readl(&regs->port[port].gpio_dir) | 1 << pin,
&regs->port[port].gpio_dir);
} else {
writel(readl(&regs->port[port].gpio_dir) & ~(1 << pin),
&regs->port[port].gpio_dir);
}
/* Primary / alternate function */
if (gpio_mode & GPIO_AF) {
writel(readl(&regs->port[port].gpr) | (1 << pin),
&regs->port[port].gpr);
} else {
writel(readl(&regs->port[port].gpr) & ~(1 << pin),
&regs->port[port].gpr);
}
/* use as gpio? */
if (!(gpio_mode & (GPIO_PF | GPIO_AF))) {
writel(readl(&regs->port[port].gius) | (1 << pin),
&regs->port[port].gius);
} else {
writel(readl(&regs->port[port].gius) & ~(1 << pin),
&regs->port[port].gius);
}
/* Output / input configuration */
if (pin < 16) {
tmp = readl(&regs->port[port].ocr1);
tmp &= ~(3 << (pin * 2));
tmp |= (ocr << (pin * 2));
writel(tmp, &regs->port[port].ocr1);
writel(readl(&regs->port[port].iconfa1) & ~(3 << (pin * 2)),
&regs->port[port].iconfa1);
writel(readl(&regs->port[port].iconfa1) | aout << (pin * 2),
&regs->port[port].iconfa1);
writel(readl(&regs->port[port].iconfb1) & ~(3 << (pin * 2)),
&regs->port[port].iconfb1);
writel(readl(&regs->port[port].iconfb1) | bout << (pin * 2),
&regs->port[port].iconfb1);
} else {
pin -= 16;
tmp = readl(&regs->port[port].ocr2);
tmp &= ~(3 << (pin * 2));
tmp |= (ocr << (pin * 2));
writel(tmp, &regs->port[port].ocr2);
writel(readl(&regs->port[port].iconfa2) & ~(3 << (pin * 2)),
&regs->port[port].iconfa2);
writel(readl(&regs->port[port].iconfa2) | aout << (pin * 2),
&regs->port[port].iconfa2);
writel(readl(&regs->port[port].iconfb2) & ~(3 << (pin * 2)),
&regs->port[port].iconfb2);
writel(readl(&regs->port[port].iconfb2) | bout << (pin * 2),
&regs->port[port].iconfb2);
}
}
#ifdef CONFIG_MXC_UART
void mx27_uart1_init_pins(void)
{
int i;
unsigned int mode[] = {
PE12_PF_UART1_TXD,
PE13_PF_UART1_RXD,
};
for (i = 0; i < ARRAY_SIZE(mode); i++)
imx_gpio_mode(mode[i]);
}
#endif /* CONFIG_MXC_UART */
#ifdef CONFIG_FEC_MXC
void mx27_fec_init_pins(void)
{
int i;
unsigned int mode[] = {
PD0_AIN_FEC_TXD0,
PD1_AIN_FEC_TXD1,
PD2_AIN_FEC_TXD2,
PD3_AIN_FEC_TXD3,
PD4_AOUT_FEC_RX_ER,
PD5_AOUT_FEC_RXD1,
PD6_AOUT_FEC_RXD2,
PD7_AOUT_FEC_RXD3,
PD8_AF_FEC_MDIO,
PD9_AIN_FEC_MDC | GPIO_PUEN,
PD10_AOUT_FEC_CRS,
PD11_AOUT_FEC_TX_CLK,
PD12_AOUT_FEC_RXD0,
PD13_AOUT_FEC_RX_DV,
PD14_AOUT_FEC_CLR,
PD15_AOUT_FEC_COL,
PD16_AIN_FEC_TX_ER,
PF23_AIN_FEC_TX_EN,
};
for (i = 0; i < ARRAY_SIZE(mode); i++)
imx_gpio_mode(mode[i]);
}
void imx_get_mac_from_fuse(int dev_id, unsigned char *mac)
{
int i;
struct iim_regs *iim = (struct iim_regs *)IMX_IIM_BASE;
struct fuse_bank *bank = &iim->bank[0];
struct fuse_bank0_regs *fuse =
(struct fuse_bank0_regs *)bank->fuse_regs;
for (i = 0; i < 6; i++)
mac[6 - 1 - i] = readl(&fuse->mac_addr[i]) & 0xff;
}
#endif /* CONFIG_FEC_MXC */
#ifdef CONFIG_MMC_MXC
void mx27_sd1_init_pins(void)
{
int i;
unsigned int mode[] = {
PE18_PF_SD1_D0,
PE19_PF_SD1_D1,
PE20_PF_SD1_D2,
PE21_PF_SD1_D3,
PE22_PF_SD1_CMD,
PE23_PF_SD1_CLK,
};
for (i = 0; i < ARRAY_SIZE(mode); i++)
imx_gpio_mode(mode[i]);
}
void mx27_sd2_init_pins(void)
{
int i;
unsigned int mode[] = {
PB4_PF_SD2_D0,
PB5_PF_SD2_D1,
PB6_PF_SD2_D2,
PB7_PF_SD2_D3,
PB8_PF_SD2_CMD,
PB9_PF_SD2_CLK,
};
for (i = 0; i < ARRAY_SIZE(mode); i++)
imx_gpio_mode(mode[i]);
}
#endif /* CONFIG_MMC_MXC */
#ifndef CONFIG_SYS_DCACHE_OFF
void enable_caches(void)
{
/* Enable D-cache. I-cache is already enabled in start.S */
dcache_enable();
}
#endif /* CONFIG_SYS_DCACHE_OFF */
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