u-boot/arch/arm/mach-mvebu/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

643 lines
16 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2014-2016 Stefan Roese <sr@denx.de>
*/
#include <common.h>
#include <ahci.h>
#include <linux/mbus.h>
#include <asm/io.h>
#include <asm/pl310.h>
#include <asm/arch/cpu.h>
#include <asm/arch/soc.h>
#include <sdhci.h>
#define DDR_BASE_CS_OFF(n) (0x0000 + ((n) << 3))
#define DDR_SIZE_CS_OFF(n) (0x0004 + ((n) << 3))
static struct mbus_win windows[] = {
/* SPI */
{ MBUS_SPI_BASE, MBUS_SPI_SIZE,
CPU_TARGET_DEVICEBUS_BOOTROM_SPI, CPU_ATTR_SPIFLASH },
/* NOR */
{ MBUS_BOOTROM_BASE, MBUS_BOOTROM_SIZE,
CPU_TARGET_DEVICEBUS_BOOTROM_SPI, CPU_ATTR_BOOTROM },
};
void lowlevel_init(void)
{
/*
* Dummy implementation, we only need LOWLEVEL_INIT
* on Armada to configure CP15 in start.S / cpu_init_cp15()
*/
}
void reset_cpu(unsigned long ignored)
{
struct mvebu_system_registers *reg =
(struct mvebu_system_registers *)MVEBU_SYSTEM_REG_BASE;
writel(readl(&reg->rstoutn_mask) | 1, &reg->rstoutn_mask);
writel(readl(&reg->sys_soft_rst) | 1, &reg->sys_soft_rst);
while (1)
;
}
int mvebu_soc_family(void)
{
u16 devid = (readl(MVEBU_REG_PCIE_DEVID) >> 16) & 0xffff;
switch (devid) {
case SOC_MV78230_ID:
case SOC_MV78260_ID:
case SOC_MV78460_ID:
return MVEBU_SOC_AXP;
case SOC_88F6720_ID:
return MVEBU_SOC_A375;
case SOC_88F6810_ID:
case SOC_88F6820_ID:
case SOC_88F6828_ID:
return MVEBU_SOC_A38X;
case SOC_98DX3236_ID:
case SOC_98DX3336_ID:
case SOC_98DX4251_ID:
return MVEBU_SOC_MSYS;
}
return MVEBU_SOC_UNKNOWN;
}
#if defined(CONFIG_DISPLAY_CPUINFO)
#if defined(CONFIG_ARMADA_375)
/* SAR frequency values for Armada 375 */
static const struct sar_freq_modes sar_freq_tab[] = {
{ 0, 0x0, 266, 133, 266 },
{ 1, 0x0, 333, 167, 167 },
{ 2, 0x0, 333, 167, 222 },
{ 3, 0x0, 333, 167, 333 },
{ 4, 0x0, 400, 200, 200 },
{ 5, 0x0, 400, 200, 267 },
{ 6, 0x0, 400, 200, 400 },
{ 7, 0x0, 500, 250, 250 },
{ 8, 0x0, 500, 250, 334 },
{ 9, 0x0, 500, 250, 500 },
{ 10, 0x0, 533, 267, 267 },
{ 11, 0x0, 533, 267, 356 },
{ 12, 0x0, 533, 267, 533 },
{ 13, 0x0, 600, 300, 300 },
{ 14, 0x0, 600, 300, 400 },
{ 15, 0x0, 600, 300, 600 },
{ 16, 0x0, 666, 333, 333 },
{ 17, 0x0, 666, 333, 444 },
{ 18, 0x0, 666, 333, 666 },
{ 19, 0x0, 800, 400, 267 },
{ 20, 0x0, 800, 400, 400 },
{ 21, 0x0, 800, 400, 534 },
{ 22, 0x0, 900, 450, 300 },
{ 23, 0x0, 900, 450, 450 },
{ 24, 0x0, 900, 450, 600 },
{ 25, 0x0, 1000, 500, 500 },
{ 26, 0x0, 1000, 500, 667 },
{ 27, 0x0, 1000, 333, 500 },
{ 28, 0x0, 400, 400, 400 },
{ 29, 0x0, 1100, 550, 550 },
{ 0xff, 0xff, 0, 0, 0 } /* 0xff marks end of array */
};
#elif defined(CONFIG_ARMADA_38X)
/* SAR frequency values for Armada 38x */
static const struct sar_freq_modes sar_freq_tab[] = {
{ 0x0, 0x0, 666, 333, 333 },
{ 0x2, 0x0, 800, 400, 400 },
{ 0x4, 0x0, 1066, 533, 533 },
{ 0x6, 0x0, 1200, 600, 600 },
{ 0x8, 0x0, 1332, 666, 666 },
{ 0xc, 0x0, 1600, 800, 800 },
{ 0x10, 0x0, 1866, 933, 933 },
{ 0x13, 0x0, 2000, 1000, 933 },
{ 0xff, 0xff, 0, 0, 0 } /* 0xff marks end of array */
};
#else
/* SAR frequency values for Armada XP */
static const struct sar_freq_modes sar_freq_tab[] = {
{ 0xa, 0x5, 800, 400, 400 },
{ 0x1, 0x5, 1066, 533, 533 },
{ 0x2, 0x5, 1200, 600, 600 },
{ 0x2, 0x9, 1200, 600, 400 },
{ 0x3, 0x5, 1333, 667, 667 },
{ 0x4, 0x5, 1500, 750, 750 },
{ 0x4, 0x9, 1500, 750, 500 },
{ 0xb, 0x9, 1600, 800, 533 },
{ 0xb, 0xa, 1600, 800, 640 },
{ 0xb, 0x5, 1600, 800, 800 },
{ 0xff, 0xff, 0, 0, 0 } /* 0xff marks end of array */
};
#endif
void get_sar_freq(struct sar_freq_modes *sar_freq)
{
u32 val;
u32 freq;
int i;
#if defined(CONFIG_ARMADA_375)
val = readl(CONFIG_SAR2_REG); /* SAR - Sample At Reset */
#else
val = readl(CONFIG_SAR_REG); /* SAR - Sample At Reset */
#endif
freq = (val & SAR_CPU_FREQ_MASK) >> SAR_CPU_FREQ_OFFS;
#if defined(SAR2_CPU_FREQ_MASK)
/*
* Shift CPU0 clock frequency select bit from SAR2 register
* into correct position
*/
freq |= ((readl(CONFIG_SAR2_REG) & SAR2_CPU_FREQ_MASK)
>> SAR2_CPU_FREQ_OFFS) << 3;
#endif
for (i = 0; sar_freq_tab[i].val != 0xff; i++) {
if (sar_freq_tab[i].val == freq) {
#if defined(CONFIG_ARMADA_375) || defined(CONFIG_ARMADA_38X)
*sar_freq = sar_freq_tab[i];
return;
#else
int k;
u8 ffc;
ffc = (val & SAR_FFC_FREQ_MASK) >>
SAR_FFC_FREQ_OFFS;
for (k = i; sar_freq_tab[k].ffc != 0xff; k++) {
if (sar_freq_tab[k].ffc == ffc) {
*sar_freq = sar_freq_tab[k];
return;
}
}
i = k;
#endif
}
}
/* SAR value not found, return 0 for frequencies */
*sar_freq = sar_freq_tab[i - 1];
}
int print_cpuinfo(void)
{
u16 devid = (readl(MVEBU_REG_PCIE_DEVID) >> 16) & 0xffff;
u8 revid = readl(MVEBU_REG_PCIE_REVID) & 0xff;
struct sar_freq_modes sar_freq;
puts("SoC: ");
switch (devid) {
case SOC_MV78230_ID:
puts("MV78230-");
break;
case SOC_MV78260_ID:
puts("MV78260-");
break;
case SOC_MV78460_ID:
puts("MV78460-");
break;
case SOC_88F6720_ID:
puts("MV88F6720-");
break;
case SOC_88F6810_ID:
puts("MV88F6810-");
break;
case SOC_88F6820_ID:
puts("MV88F6820-");
break;
case SOC_88F6828_ID:
puts("MV88F6828-");
break;
case SOC_98DX3236_ID:
puts("98DX3236-");
break;
case SOC_98DX3336_ID:
puts("98DX3336-");
break;
case SOC_98DX4251_ID:
puts("98DX4251-");
break;
default:
puts("Unknown-");
break;
}
if (mvebu_soc_family() == MVEBU_SOC_AXP) {
switch (revid) {
case 1:
puts("A0");
break;
case 2:
puts("B0");
break;
default:
printf("?? (%x)", revid);
break;
}
}
if (mvebu_soc_family() == MVEBU_SOC_A375) {
switch (revid) {
case MV_88F67XX_A0_ID:
puts("A0");
break;
default:
printf("?? (%x)", revid);
break;
}
}
if (mvebu_soc_family() == MVEBU_SOC_A38X) {
switch (revid) {
case MV_88F68XX_Z1_ID:
puts("Z1");
break;
case MV_88F68XX_A0_ID:
puts("A0");
break;
default:
printf("?? (%x)", revid);
break;
}
}
get_sar_freq(&sar_freq);
printf(" at %d MHz\n", sar_freq.p_clk);
return 0;
}
#endif /* CONFIG_DISPLAY_CPUINFO */
/*
* This function initialize Controller DRAM Fastpath windows.
* It takes the CS size information from the 0x1500 scratch registers
* and sets the correct windows sizes and base addresses accordingly.
*
* These values are set in the scratch registers by the Marvell
* DDR3 training code, which is executed by the BootROM before the
* main payload (U-Boot) is executed. This training code is currently
* only available in the Marvell U-Boot version. It needs to be
* ported to mainline U-Boot SPL at some point.
*/
static void update_sdram_window_sizes(void)
{
u64 base = 0;
u32 size, temp;
int i;
for (i = 0; i < SDRAM_MAX_CS; i++) {
size = readl((MVEBU_SDRAM_SCRATCH + (i * 8))) & SDRAM_ADDR_MASK;
if (size != 0) {
size |= ~(SDRAM_ADDR_MASK);
/* Set Base Address */
temp = (base & 0xFF000000ll) | ((base >> 32) & 0xF);
writel(temp, MVEBU_SDRAM_BASE + DDR_BASE_CS_OFF(i));
/*
* Check if out of max window size and resize
* the window
*/
temp = (readl(MVEBU_SDRAM_BASE + DDR_SIZE_CS_OFF(i)) &
~(SDRAM_ADDR_MASK)) | 1;
temp |= (size & SDRAM_ADDR_MASK);
writel(temp, MVEBU_SDRAM_BASE + DDR_SIZE_CS_OFF(i));
base += ((u64)size + 1);
} else {
/*
* Disable window if not used, otherwise this
* leads to overlapping enabled windows with
* pretty strange results
*/
clrbits_le32(MVEBU_SDRAM_BASE + DDR_SIZE_CS_OFF(i), 1);
}
}
}
void mmu_disable(void)
{
asm volatile(
"mrc p15, 0, r0, c1, c0, 0\n"
"bic r0, #1\n"
"mcr p15, 0, r0, c1, c0, 0\n");
}
#ifdef CONFIG_ARCH_CPU_INIT
static void set_cbar(u32 addr)
{
asm("mcr p15, 4, %0, c15, c0" : : "r" (addr));
}
#define MV_USB_PHY_BASE (MVEBU_AXP_USB_BASE + 0x800)
#define MV_USB_PHY_PLL_REG(reg) (MV_USB_PHY_BASE | (((reg) & 0xF) << 2))
#define MV_USB_X3_BASE(addr) (MVEBU_AXP_USB_BASE | BIT(11) | \
(((addr) & 0xF) << 6))
#define MV_USB_X3_PHY_CHANNEL(dev, reg) (MV_USB_X3_BASE((dev) + 1) | \
(((reg) & 0xF) << 2))
static void setup_usb_phys(void)
{
int dev;
/*
* USB PLL init
*/
/* Setup PLL frequency */
/* USB REF frequency = 25 MHz */
clrsetbits_le32(MV_USB_PHY_PLL_REG(1), 0x3ff, 0x605);
/* Power up PLL and PHY channel */
setbits_le32(MV_USB_PHY_PLL_REG(2), BIT(9));
/* Assert VCOCAL_START */
setbits_le32(MV_USB_PHY_PLL_REG(1), BIT(21));
mdelay(1);
/*
* USB PHY init (change from defaults) specific for 40nm (78X30 78X60)
*/
for (dev = 0; dev < 3; dev++) {
setbits_le32(MV_USB_X3_PHY_CHANNEL(dev, 3), BIT(15));
/* Assert REG_RCAL_START in channel REG 1 */
setbits_le32(MV_USB_X3_PHY_CHANNEL(dev, 1), BIT(12));
udelay(40);
clrbits_le32(MV_USB_X3_PHY_CHANNEL(dev, 1), BIT(12));
}
}
/*
* This function is not called from the SPL U-Boot version
*/
int arch_cpu_init(void)
{
struct pl310_regs *const pl310 =
(struct pl310_regs *)CONFIG_SYS_PL310_BASE;
/*
* Only with disabled MMU its possible to switch the base
* register address on Armada 38x. Without this the SDRAM
* located at >= 0x4000.0000 is also not accessible, as its
* still locked to cache.
*/
mmu_disable();
/* Linux expects the internal registers to be at 0xf1000000 */
writel(SOC_REGS_PHY_BASE, INTREG_BASE_ADDR_REG);
set_cbar(SOC_REGS_PHY_BASE + 0xC000);
/*
* From this stage on, the SoC detection is working. As we have
* configured the internal register base to the value used
* in the macros / defines in the U-Boot header (soc.h).
*/
if (mvebu_soc_family() == MVEBU_SOC_A38X) {
/*
* To fully release / unlock this area from cache, we need
* to flush all caches and disable the L2 cache.
*/
icache_disable();
dcache_disable();
clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
}
/*
* We need to call mvebu_mbus_probe() before calling
* update_sdram_window_sizes() as it disables all previously
* configured mbus windows and then configures them as
* required for U-Boot. Calling update_sdram_window_sizes()
* without this configuration will not work, as the internal
* registers can't be accessed reliably because of potenial
* double mapping.
* After updating the SDRAM access windows we need to call
* mvebu_mbus_probe() again, as this now correctly configures
* the SDRAM areas that are later used by the MVEBU drivers
* (e.g. USB, NETA).
*/
/*
* First disable all windows
*/
mvebu_mbus_probe(NULL, 0);
if (mvebu_soc_family() == MVEBU_SOC_AXP) {
/*
* Now the SDRAM access windows can be reconfigured using
* the information in the SDRAM scratch pad registers
*/
update_sdram_window_sizes();
}
/*
* Finally the mbus windows can be configured with the
* updated SDRAM sizes
*/
mvebu_mbus_probe(windows, ARRAY_SIZE(windows));
if (mvebu_soc_family() == MVEBU_SOC_AXP) {
/* Enable GBE0, GBE1, LCD and NFC PUP */
clrsetbits_le32(ARMADA_XP_PUP_ENABLE, 0,
GE0_PUP_EN | GE1_PUP_EN | LCD_PUP_EN |
NAND_PUP_EN | SPI_PUP_EN);
/* Configure USB PLL and PHYs on AXP */
setup_usb_phys();
}
/* Enable NAND and NAND arbiter */
clrsetbits_le32(MVEBU_SOC_DEV_MUX_REG, 0, NAND_EN | NAND_ARBITER_EN);
/* Disable MBUS error propagation */
clrsetbits_le32(SOC_COHERENCY_FABRIC_CTRL_REG, MBUS_ERR_PROP_EN, 0);
return 0;
}
#endif /* CONFIG_ARCH_CPU_INIT */
u32 mvebu_get_nand_clock(void)
{
u32 reg;
if (mvebu_soc_family() == MVEBU_SOC_A38X)
reg = MVEBU_DFX_DIV_CLK_CTRL(1);
else
reg = MVEBU_CORE_DIV_CLK_CTRL(1);
return CONFIG_SYS_MVEBU_PLL_CLOCK /
((readl(reg) &
NAND_ECC_DIVCKL_RATIO_MASK) >> NAND_ECC_DIVCKL_RATIO_OFFS);
}
/*
* SOC specific misc init
*/
#if defined(CONFIG_ARCH_MISC_INIT)
int arch_misc_init(void)
{
/* Nothing yet, perhaps we need something here later */
return 0;
}
#endif /* CONFIG_ARCH_MISC_INIT */
#ifdef CONFIG_MMC_SDHCI_MV
int board_mmc_init(bd_t *bis)
{
mv_sdh_init(MVEBU_SDIO_BASE, 0, 0,
SDHCI_QUIRK_32BIT_DMA_ADDR | SDHCI_QUIRK_WAIT_SEND_CMD);
return 0;
}
#endif
#ifdef CONFIG_SCSI_AHCI_PLAT
#define AHCI_VENDOR_SPECIFIC_0_ADDR 0xa0
#define AHCI_VENDOR_SPECIFIC_0_DATA 0xa4
#define AHCI_WINDOW_CTRL(win) (0x60 + ((win) << 4))
#define AHCI_WINDOW_BASE(win) (0x64 + ((win) << 4))
#define AHCI_WINDOW_SIZE(win) (0x68 + ((win) << 4))
static void ahci_mvebu_mbus_config(void __iomem *base)
{
const struct mbus_dram_target_info *dram;
int i;
dram = mvebu_mbus_dram_info();
for (i = 0; i < 4; i++) {
writel(0, base + AHCI_WINDOW_CTRL(i));
writel(0, base + AHCI_WINDOW_BASE(i));
writel(0, base + AHCI_WINDOW_SIZE(i));
}
for (i = 0; i < dram->num_cs; i++) {
const struct mbus_dram_window *cs = dram->cs + i;
writel((cs->mbus_attr << 8) |
(dram->mbus_dram_target_id << 4) | 1,
base + AHCI_WINDOW_CTRL(i));
writel(cs->base >> 16, base + AHCI_WINDOW_BASE(i));
writel(((cs->size - 1) & 0xffff0000),
base + AHCI_WINDOW_SIZE(i));
}
}
static void ahci_mvebu_regret_option(void __iomem *base)
{
/*
* Enable the regret bit to allow the SATA unit to regret a
* request that didn't receive an acknowlegde and avoid a
* deadlock
*/
writel(0x4, base + AHCI_VENDOR_SPECIFIC_0_ADDR);
writel(0x80, base + AHCI_VENDOR_SPECIFIC_0_DATA);
}
void scsi_init(void)
{
printf("MVEBU SATA INIT\n");
ahci_mvebu_mbus_config((void __iomem *)MVEBU_SATA0_BASE);
ahci_mvebu_regret_option((void __iomem *)MVEBU_SATA0_BASE);
ahci_init((void __iomem *)MVEBU_SATA0_BASE);
}
#endif
#ifdef CONFIG_USB_XHCI_MVEBU
#define USB3_MAX_WINDOWS 4
#define USB3_WIN_CTRL(w) (0x0 + ((w) * 8))
#define USB3_WIN_BASE(w) (0x4 + ((w) * 8))
static void xhci_mvebu_mbus_config(void __iomem *base,
const struct mbus_dram_target_info *dram)
{
int i;
for (i = 0; i < USB3_MAX_WINDOWS; i++) {
writel(0, base + USB3_WIN_CTRL(i));
writel(0, base + USB3_WIN_BASE(i));
}
for (i = 0; i < dram->num_cs; i++) {
const struct mbus_dram_window *cs = dram->cs + i;
/* Write size, attributes and target id to control register */
writel(((cs->size - 1) & 0xffff0000) | (cs->mbus_attr << 8) |
(dram->mbus_dram_target_id << 4) | 1,
base + USB3_WIN_CTRL(i));
/* Write base address to base register */
writel((cs->base & 0xffff0000), base + USB3_WIN_BASE(i));
}
}
int board_xhci_enable(fdt_addr_t base)
{
const struct mbus_dram_target_info *dram;
printf("MVEBU XHCI INIT controller @ 0x%lx\n", base);
dram = mvebu_mbus_dram_info();
xhci_mvebu_mbus_config((void __iomem *)base, dram);
return 0;
}
#endif
void enable_caches(void)
{
/* Avoid problem with e.g. neta ethernet driver */
invalidate_dcache_all();
/*
* Armada 375 still has some problems with d-cache enabled in the
* ethernet driver (mvpp2). So lets keep the d-cache disabled
* until this is solved.
*/
if (mvebu_soc_family() != MVEBU_SOC_A375) {
/* Enable D-cache. I-cache is already enabled in start.S */
dcache_enable();
}
}
void v7_outer_cache_enable(void)
{
if (mvebu_soc_family() == MVEBU_SOC_AXP) {
struct pl310_regs *const pl310 =
(struct pl310_regs *)CONFIG_SYS_PL310_BASE;
u32 u;
/* The L2 cache is already disabled at this point */
/*
* For Aurora cache in no outer mode, enable via the CP15
* coprocessor broadcasting of cache commands to L2.
*/
asm volatile("mrc p15, 1, %0, c15, c2, 0" : "=r" (u));
u |= BIT(8); /* Set the FW bit */
asm volatile("mcr p15, 1, %0, c15, c2, 0" : : "r" (u));
isb();
/* Enable the L2 cache */
setbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
}
}
void v7_outer_cache_disable(void)
{
struct pl310_regs *const pl310 =
(struct pl310_regs *)CONFIG_SYS_PL310_BASE;
clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
}