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u-boot/arch/mips/mach-ath79/reset.c
Rosy Song 61290fb52c mips: add initial support for qca956x referenced board 
QCA9563 is CPU used on AP152 board :

    Clock speed : 750 MHz ,
    Arch :  Mips 74Kc,
    Eth : SGMII interface,
    MIMO config : 3 * 3 450M,
    2 * USB 2.0,

Signed-off-by: Rosy Song <rosysong@rosinson.com>

Changes for v2:
   - coding style cleanup
   - remove ununsed flash chip in defconfig
   - enable automatic icache / dcache size in defconfig

Changes for v3:
   - add detailed information for qca956x in commit message

Changes for v4:
   - remove pre-configured network settings in ap152.h

Changes for v5:
   - coding style cleanup
2019-04-12 17:32:50 +02:00

529 lines
15 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2015-2016 Wills Wang <wills.wang@live.com>
* Copyright (C) 2018-2019 Rosy Song <rosysong@rosinson.com>
*/
#include <common.h>
#include <linux/errno.h>
#include <asm/io.h>
#include <asm/addrspace.h>
#include <asm/types.h>
#include <mach/ath79.h>
#include <mach/ar71xx_regs.h>
/* QCA956X ETH_SGMII_SERDES Registers */
#define SGMII_SERDES_RES_CALIBRATION_LSB 23
#define SGMII_SERDES_RES_CALIBRATION_MASK 0x07800000
#define SGMII_SERDES_RES_CALIBRATION_SET(x) \
(((x) << SGMII_SERDES_RES_CALIBRATION_LSB) & SGMII_SERDES_RES_CALIBRATION_MASK)
#define SGMII_SERDES_CDR_BW_LSB 1
#define SGMII_SERDES_CDR_BW_MASK 0x00000006
#define SGMII_SERDES_CDR_BW_SET(x) \
(((x) << SGMII_SERDES_CDR_BW_LSB) & SGMII_SERDES_CDR_BW_MASK)
#define SGMII_SERDES_TX_DR_CTRL_LSB 4
#define SGMII_SERDES_TX_DR_CTRL_MASK 0x00000070
#define SGMII_SERDES_TX_DR_CTRL_SET(x) \
(((x) << SGMII_SERDES_TX_DR_CTRL_LSB) & SGMII_SERDES_TX_DR_CTRL_MASK)
#define SGMII_SERDES_PLL_BW_LSB 8
#define SGMII_SERDES_PLL_BW_MASK 0x00000100
#define SGMII_SERDES_PLL_BW_SET(x) \
(((x) << SGMII_SERDES_PLL_BW_LSB) & SGMII_SERDES_PLL_BW_MASK)
#define SGMII_SERDES_EN_SIGNAL_DETECT_LSB 16
#define SGMII_SERDES_EN_SIGNAL_DETECT_MASK 0x00010000
#define SGMII_SERDES_EN_SIGNAL_DETECT_SET(x) \
(((x) << SGMII_SERDES_EN_SIGNAL_DETECT_LSB) & SGMII_SERDES_EN_SIGNAL_DETECT_MASK)
#define SGMII_SERDES_FIBER_SDO_LSB 17
#define SGMII_SERDES_FIBER_SDO_MASK 0x00020000
#define SGMII_SERDES_FIBER_SDO_SET(x) \
(((x) << SGMII_SERDES_FIBER_SDO_LSB) & SGMII_SERDES_FIBER_SDO_MASK)
#define SGMII_SERDES_VCO_REG_LSB 27
#define SGMII_SERDES_VCO_REG_MASK 0x78000000
#define SGMII_SERDES_VCO_REG_SET(x) \
(((x) << SGMII_SERDES_VCO_REG_LSB) & SGMII_SERDES_VCO_REG_MASK)
#define SGMII_SERDES_VCO_FAST_LSB 9
#define SGMII_SERDES_VCO_FAST_MASK 0x00000200
#define SGMII_SERDES_VCO_FAST_GET(x) \
(((x) & SGMII_SERDES_VCO_FAST_MASK) >> SGMII_SERDES_VCO_FAST_LSB)
#define SGMII_SERDES_VCO_SLOW_LSB 10
#define SGMII_SERDES_VCO_SLOW_MASK 0x00000400
#define SGMII_SERDES_VCO_SLOW_GET(x) \
(((x) & SGMII_SERDES_VCO_SLOW_MASK) >> SGMII_SERDES_VCO_SLOW_LSB)
void _machine_restart(void)
{
void __iomem *base;
u32 reg = 0;
base = map_physmem(AR71XX_RESET_BASE, AR71XX_RESET_SIZE,
MAP_NOCACHE);
if (soc_is_ar71xx())
reg = AR71XX_RESET_REG_RESET_MODULE;
else if (soc_is_ar724x())
reg = AR724X_RESET_REG_RESET_MODULE;
else if (soc_is_ar913x())
reg = AR913X_RESET_REG_RESET_MODULE;
else if (soc_is_ar933x())
reg = AR933X_RESET_REG_RESET_MODULE;
else if (soc_is_ar934x())
reg = AR934X_RESET_REG_RESET_MODULE;
else if (soc_is_qca953x())
reg = QCA953X_RESET_REG_RESET_MODULE;
else if (soc_is_qca955x())
reg = QCA955X_RESET_REG_RESET_MODULE;
else if (soc_is_qca956x())
reg = QCA956X_RESET_REG_RESET_MODULE;
else
puts("Reset register not defined for this SOC\n");
if (reg)
setbits_be32(base + reg, AR71XX_RESET_FULL_CHIP);
while (1)
/* NOP */;
}
u32 ath79_get_bootstrap(void)
{
void __iomem *base;
u32 reg = 0;
base = map_physmem(AR71XX_RESET_BASE, AR71XX_RESET_SIZE,
MAP_NOCACHE);
if (soc_is_ar933x())
reg = AR933X_RESET_REG_BOOTSTRAP;
else if (soc_is_ar934x())
reg = AR934X_RESET_REG_BOOTSTRAP;
else if (soc_is_qca953x())
reg = QCA953X_RESET_REG_BOOTSTRAP;
else if (soc_is_qca955x())
reg = QCA955X_RESET_REG_BOOTSTRAP;
else if (soc_is_qca956x())
reg = QCA956X_RESET_REG_BOOTSTRAP;
else
puts("Bootstrap register not defined for this SOC\n");
if (reg)
return readl(base + reg);
return 0;
}
static int eth_init_ar933x(void)
{
void __iomem *rregs = map_physmem(AR71XX_RESET_BASE, AR71XX_RESET_SIZE,
MAP_NOCACHE);
void __iomem *pregs = map_physmem(AR71XX_PLL_BASE, AR71XX_PLL_SIZE,
MAP_NOCACHE);
void __iomem *gregs = map_physmem(AR933X_GMAC_BASE, AR933X_GMAC_SIZE,
MAP_NOCACHE);
const u32 mask = AR933X_RESET_GE0_MAC | AR933X_RESET_GE0_MDIO |
AR933X_RESET_GE1_MAC | AR933X_RESET_GE1_MDIO |
AR933X_RESET_ETH_SWITCH |
AR933X_RESET_ETH_SWITCH_ANALOG;
/* Clear MDIO slave EN bit. */
clrbits_be32(rregs + AR933X_RESET_REG_BOOTSTRAP, BIT(17));
mdelay(10);
/* Get Atheros S26 PHY out of reset. */
clrsetbits_be32(pregs + AR933X_PLL_SWITCH_CLOCK_CONTROL_REG,
0x1f, 0x10);
mdelay(10);
setbits_be32(rregs + AR933X_RESET_REG_RESET_MODULE, mask);
mdelay(10);
clrbits_be32(rregs + AR933X_RESET_REG_RESET_MODULE, mask);
mdelay(10);
/* Configure AR93xx GMAC register. */
clrsetbits_be32(gregs + AR933X_GMAC_REG_ETH_CFG,
AR933X_ETH_CFG_MII_GE0_MASTER |
AR933X_ETH_CFG_MII_GE0_SLAVE,
AR933X_ETH_CFG_MII_GE0_SLAVE);
return 0;
}
static int eth_init_ar934x(void)
{
void __iomem *rregs = map_physmem(AR71XX_RESET_BASE, AR71XX_RESET_SIZE,
MAP_NOCACHE);
void __iomem *pregs = map_physmem(AR71XX_PLL_BASE, AR71XX_PLL_SIZE,
MAP_NOCACHE);
void __iomem *gregs = map_physmem(AR934X_GMAC_BASE, AR934X_GMAC_SIZE,
MAP_NOCACHE);
const u32 mask = AR934X_RESET_GE0_MAC | AR934X_RESET_GE0_MDIO |
AR934X_RESET_GE1_MAC | AR934X_RESET_GE1_MDIO |
AR934X_RESET_ETH_SWITCH_ANALOG;
u32 reg;
reg = readl(rregs + AR934X_RESET_REG_BOOTSTRAP);
if (reg & AR934X_BOOTSTRAP_REF_CLK_40)
writel(0x570, pregs + AR934X_PLL_SWITCH_CLOCK_CONTROL_REG);
else
writel(0x271, pregs + AR934X_PLL_SWITCH_CLOCK_CONTROL_REG);
writel(BIT(26) | BIT(25), pregs + AR934X_PLL_ETH_XMII_CONTROL_REG);
setbits_be32(rregs + AR934X_RESET_REG_RESET_MODULE, mask);
mdelay(1);
clrbits_be32(rregs + AR934X_RESET_REG_RESET_MODULE, mask);
mdelay(1);
/* Configure AR934x GMAC register. */
writel(AR934X_ETH_CFG_RGMII_GMAC0, gregs + AR934X_GMAC_REG_ETH_CFG);
return 0;
}
static int eth_init_qca953x(void)
{
void __iomem *rregs = map_physmem(AR71XX_RESET_BASE, AR71XX_RESET_SIZE,
MAP_NOCACHE);
const u32 mask = QCA953X_RESET_GE0_MAC | QCA953X_RESET_GE0_MDIO |
QCA953X_RESET_GE1_MAC | QCA953X_RESET_GE1_MDIO |
QCA953X_RESET_ETH_SWITCH_ANALOG |
QCA953X_RESET_ETH_SWITCH;
setbits_be32(rregs + AR934X_RESET_REG_RESET_MODULE, mask);
mdelay(1);
clrbits_be32(rregs + AR934X_RESET_REG_RESET_MODULE, mask);
mdelay(1);
return 0;
}
static int qca956x_sgmii_cal(void)
{
int i;
u32 reg, rev_sgmii_val;
u32 vco_fast, vco_slow;
u32 start_val = 0, end_val = 0;
void __iomem *gregs = map_physmem(AR71XX_MII_BASE, AR71XX_MII_SIZE,
MAP_NOCACHE);
void __iomem *pregs = map_physmem(AR71XX_PLL_BASE, AR71XX_PLL_SIZE,
MAP_NOCACHE);
void __iomem *rregs = map_physmem(AR71XX_RESET_BASE, AR71XX_RESET_SIZE,
MAP_NOCACHE);
const u32 mask = QCA956X_RESET_SGMII_ASSERT | QCA956X_RESET_SGMII;
writel(BIT(2) | BIT(0), pregs + QCA956X_PLL_ETH_SGMII_SERDES_REG);
reg = readl(gregs + QCA956X_GMAC_REG_SGMII_SERDES);
vco_fast = SGMII_SERDES_VCO_FAST_GET(reg);
vco_slow = SGMII_SERDES_VCO_SLOW_GET(reg);
/* Set resistor calibration from 0000 to 1111 */
for (i = 0; i < 0x10; i++) {
reg = (readl(gregs + QCA956X_GMAC_REG_SGMII_SERDES) &
~SGMII_SERDES_RES_CALIBRATION_MASK) |
SGMII_SERDES_RES_CALIBRATION_SET(i);
writel(reg, gregs + QCA956X_GMAC_REG_SGMII_SERDES);
udelay(50);
reg = readl(gregs + QCA956X_GMAC_REG_SGMII_SERDES);
if (vco_fast != SGMII_SERDES_VCO_FAST_GET(reg) ||
vco_slow != SGMII_SERDES_VCO_SLOW_GET(reg)) {
if (start_val == 0) {
start_val = i;
end_val = i;
} else {
end_val = i;
}
}
vco_fast = SGMII_SERDES_VCO_FAST_GET(reg);
vco_slow = SGMII_SERDES_VCO_SLOW_GET(reg);
}
if (start_val == 0)
rev_sgmii_val = 0x7;
else
rev_sgmii_val = (start_val + end_val) >> 1;
writel((readl(gregs + QCA956X_GMAC_REG_SGMII_SERDES) &
~SGMII_SERDES_RES_CALIBRATION_MASK) |
SGMII_SERDES_RES_CALIBRATION_SET(rev_sgmii_val),
gregs + QCA956X_GMAC_REG_SGMII_SERDES);
writel(BIT(2) | BIT(0), pregs + QCA956X_PLL_ETH_SGMII_SERDES_REG);
reg = readl(gregs + QCA956X_GMAC_REG_SGMII_SERDES);
writel(SGMII_SERDES_CDR_BW_SET(3) | SGMII_SERDES_TX_DR_CTRL_SET(1) |
SGMII_SERDES_PLL_BW_SET(1) | SGMII_SERDES_EN_SIGNAL_DETECT_SET(1) |
SGMII_SERDES_FIBER_SDO_SET(1) | SGMII_SERDES_VCO_REG_SET(3) | reg,
gregs + QCA956X_GMAC_REG_SGMII_SERDES);
setbits_be32(rregs + QCA956X_RESET_REG_RESET_MODULE, mask);
mdelay(1);
clrbits_be32(rregs + QCA956X_RESET_REG_RESET_MODULE, mask);
mdelay(1);
while (!(readl(gregs + QCA956X_GMAC_REG_SGMII_SERDES) & BIT(15)))
/* NOP */;
return 0;
}
static int qca956x_sgmii_setup(void)
{
int i;
u32 s = 0, reg = 0;
u32 _regs[] = {
BIT(4), /* HW_RX_125M_N */
BIT(2), /* RX_125M_N */
BIT(3), /* TX_125M_N */
BIT(0), /* RX_CLK_N */
BIT(1), /* TX_CLK_N */
};
void __iomem *gregs = map_physmem(AR71XX_MII_BASE, AR71XX_MII_SIZE,
MAP_NOCACHE);
/* Force sgmii mode */
writel(BIT(6) | BIT(15) | BIT(8), gregs + QCA956X_GMAC_REG_MR_AN_CTRL);
udelay(10);
writel(0x2 | BIT(5) | (0x2 << 6), gregs + QCA956X_GMAC_REG_SGMII_CONFIG);
/* SGMII reset sequence sugguest by qca systems team. */
writel(0, gregs + QCA956X_GMAC_REG_SGMII_RESET);
for (i = 0; i < ARRAY_SIZE(_regs); i++) {
reg |= _regs[i];
writel(reg, gregs + QCA956X_GMAC_REG_SGMII_RESET);
}
writel(readl(gregs + QCA956X_GMAC_REG_MR_AN_CTRL) & ~BIT(15),
gregs + QCA956X_GMAC_REG_MR_AN_CTRL);
/*
* WARNING: Across resets SGMII link status goes to weird state.
* if 0xb8070058 (SGMII_DEBUG Register) reads other than 0xf or 0x10
* for sure we are in bad state.
* Issue a PHY RESET in MR_AN_CONTROL_ADDRESS to keep going.
*/
i = 0;
s = (readl(gregs + QCA956X_GMAC_REG_SGMII_DEBUG) & 0xff);
while (!(s == 0xf || s == 0x10)) {
writel(readl(gregs + QCA956X_GMAC_REG_MR_AN_CTRL) | BIT(15),
gregs + QCA956X_GMAC_REG_MR_AN_CTRL);
udelay(100);
writel(readl(gregs + QCA956X_GMAC_REG_MR_AN_CTRL) & ~BIT(15),
gregs + QCA956X_GMAC_REG_MR_AN_CTRL);
if (i++ == 10)
break;
s = (readl(gregs + QCA956X_GMAC_REG_SGMII_DEBUG) & 0xff);
}
return 0;
}
static int qca956x_s17_reset(void)
{
void __iomem *regs = map_physmem(AR71XX_GPIO_BASE, AR71XX_GPIO_SIZE,
MAP_NOCACHE);
void __iomem *rregs = map_physmem(AR71XX_RESET_BASE, AR71XX_RESET_SIZE,
MAP_NOCACHE);
const u32 mask = QCA956X_RESET_SGMII_ASSERT | QCA956X_RESET_SGMII |
QCA956X_RESET_EXTERNAL | QCA956X_RESET_SGMII_ANALOG |
QCA956X_RESET_SWITCH;
/* Bits(Reserved in datasheet) should be set to 1 */
const u32 mask_r = QCA956X_RESET_SGMII_ASSERT | QCA956X_RESET_SGMII |
QCA956X_RESET_EXTERNAL;
setbits_be32(rregs + QCA956X_RESET_REG_RESET_MODULE, mask);
mdelay(1);
clrbits_be32(rregs + QCA956X_RESET_REG_RESET_MODULE, mask_r);
mdelay(1);
/* Reset s17 switch(GPIO11) SYS_RST_L */
writel(readl(regs + AR71XX_GPIO_REG_OE) & ~BIT(11),
regs + AR71XX_GPIO_REG_OE);
udelay(100);
writel(readl(regs + AR71XX_GPIO_REG_OUT) & ~BIT(11),
regs + AR71XX_GPIO_REG_OUT);
udelay(100);
writel(readl(regs + AR71XX_GPIO_REG_OUT) | BIT(11),
regs + AR71XX_GPIO_REG_OUT);
return 0;
}
static int qca956x_init_mdio(void)
{
u32 reg;
void __iomem *regs = map_physmem(AR71XX_GPIO_BASE, AR71XX_GPIO_SIZE,
MAP_NOCACHE);
void __iomem *rregs = map_physmem(AR71XX_RESET_BASE, AR71XX_RESET_SIZE,
MAP_NOCACHE);
const u32 mask = QCA956X_RESET_GE0_MDIO | QCA956X_RESET_GE0_MAC |
QCA956X_RESET_GE1_MDIO | QCA956X_RESET_GE1_MAC;
setbits_be32(rregs + QCA956X_RESET_REG_RESET_MODULE, mask);
mdelay(1);
clrbits_be32(rregs + QCA956X_RESET_REG_RESET_MODULE, mask);
mdelay(1);
/* GPIO4 as MDI */
reg = readl(regs + QCA956X_GPIO_REG_IN_ENABLE3);
reg &= ~(0xff << 16);
reg |= (0x4 << 16);
writel(reg, regs + QCA956X_GPIO_REG_IN_ENABLE3);
/* GPIO4 as MDO */
reg = readl(regs + QCA956X_GPIO_REG_OUT_FUNC1);
reg &= ~0xff;
reg |= 0x20;
writel(reg, regs + QCA956X_GPIO_REG_OUT_FUNC1);
/* Init MDC(GPIO3) / MDIO(GPIO4) */
reg = readl(regs + AR71XX_GPIO_REG_OE);
reg &= ~BIT(4);
writel(reg, regs + AR71XX_GPIO_REG_OE);
udelay(100);
reg = readl(regs + AR71XX_GPIO_REG_OE);
reg &= ~BIT(3);
writel(reg, regs + AR71XX_GPIO_REG_OE);
udelay(100);
/* GPIO3 as MDI */
reg = readl(regs + QCA956X_GPIO_REG_OUT_FUNC0);
reg &= ~(0xff << 24);
reg |= (0x21 << 24);
writel(reg, regs + QCA956X_GPIO_REG_OUT_FUNC0);
return 0;
}
static int eth_init_qca956x(void)
{
void __iomem *pregs = map_physmem(AR71XX_PLL_BASE, AR71XX_PLL_SIZE,
MAP_NOCACHE);
void __iomem *gregs = map_physmem(AR71XX_MII_BASE, AR71XX_MII_SIZE,
MAP_NOCACHE);
qca956x_sgmii_cal();
qca956x_s17_reset();
qca956x_init_mdio();
if (ath79_get_bootstrap() & QCA956X_BOOTSTRAP_REF_CLK_40)
writel(0x45500, pregs + QCA956X_PLL_SWITCH_CLK_CTRL_REG);
else
writel(0xc5200, pregs + QCA956X_PLL_SWITCH_CLK_CTRL_REG);
qca956x_sgmii_setup();
writel((3 << 16) | (3 << 14) | (1 << 0) | (1 << 6),
gregs + QCA956X_GMAC_REG_ETH_CFG);
writel((1 << 31) | (2 << 28) | (2 << 26) | (1 << 25),
pregs + QCA956X_PLL_ETH_XMII_CTRL_REG);
mdelay(1);
return 0;
}
int ath79_eth_reset(void)
{
/*
* Un-reset ethernet. DM still doesn't have any notion of reset
* framework, so we do it by hand here.
*/
if (soc_is_ar933x())
return eth_init_ar933x();
if (soc_is_ar934x())
return eth_init_ar934x();
if (soc_is_qca953x())
return eth_init_qca953x();
if (soc_is_qca956x())
return eth_init_qca956x();
return -EINVAL;
}
static int usb_reset_ar933x(void __iomem *reset_regs)
{
/* Ungate the USB block */
setbits_be32(reset_regs + AR933X_RESET_REG_RESET_MODULE,
AR933X_RESET_USBSUS_OVERRIDE);
mdelay(1);
clrbits_be32(reset_regs + AR933X_RESET_REG_RESET_MODULE,
AR933X_RESET_USB_HOST);
mdelay(1);
clrbits_be32(reset_regs + AR933X_RESET_REG_RESET_MODULE,
AR933X_RESET_USB_PHY);
mdelay(1);
return 0;
}
static int usb_reset_ar934x(void __iomem *reset_regs)
{
/* Ungate the USB block */
setbits_be32(reset_regs + AR934X_RESET_REG_RESET_MODULE,
AR934X_RESET_USBSUS_OVERRIDE);
mdelay(1);
clrbits_be32(reset_regs + AR934X_RESET_REG_RESET_MODULE,
AR934X_RESET_USB_PHY);
mdelay(1);
clrbits_be32(reset_regs + AR934X_RESET_REG_RESET_MODULE,
AR934X_RESET_USB_PHY_ANALOG);
mdelay(1);
clrbits_be32(reset_regs + AR934X_RESET_REG_RESET_MODULE,
AR934X_RESET_USB_HOST);
mdelay(1);
return 0;
}
static int usb_reset_qca953x(void __iomem *reset_regs)
{
void __iomem *pregs = map_physmem(AR71XX_PLL_BASE, AR71XX_PLL_SIZE,
MAP_NOCACHE);
clrsetbits_be32(pregs + QCA953X_PLL_SWITCH_CLOCK_CONTROL_REG,
0xf00, 0x200);
mdelay(10);
/* Ungate the USB block */
setbits_be32(reset_regs + QCA953X_RESET_REG_RESET_MODULE,
QCA953X_RESET_USBSUS_OVERRIDE);
mdelay(1);
clrbits_be32(reset_regs + QCA953X_RESET_REG_RESET_MODULE,
QCA953X_RESET_USB_PHY);
mdelay(1);
clrbits_be32(reset_regs + QCA953X_RESET_REG_RESET_MODULE,
QCA953X_RESET_USB_PHY_ANALOG);
mdelay(1);
clrbits_be32(reset_regs + QCA953X_RESET_REG_RESET_MODULE,
QCA953X_RESET_USB_HOST);
mdelay(1);
clrbits_be32(reset_regs + QCA953X_RESET_REG_RESET_MODULE,
QCA953X_RESET_USB_PHY_PLL_PWD_EXT);
mdelay(1);
return 0;
}
int ath79_usb_reset(void)
{
void __iomem *usbc_regs = map_physmem(AR71XX_USB_CTRL_BASE,
AR71XX_USB_CTRL_SIZE,
MAP_NOCACHE);
void __iomem *reset_regs = map_physmem(AR71XX_RESET_BASE,
AR71XX_RESET_SIZE,
MAP_NOCACHE);
/*
* Turn on the Buff and Desc swap bits.
* NOTE: This write into an undocumented register in mandatory to
* get the USB controller operational in BigEndian mode.
*/
writel(0xf0000, usbc_regs + AR71XX_USB_CTRL_REG_CONFIG);
if (soc_is_ar933x())
return usb_reset_ar933x(reset_regs);
if (soc_is_ar934x())
return usb_reset_ar934x(reset_regs);
if (soc_is_qca953x())
return usb_reset_qca953x(reset_regs);
return -EINVAL;
}
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