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u-boot/board/theadorable/theadorable.c
Pali Rohár 5692e5b244 arm: mvebu: mbus: Fix mbus driver to work also after U-Boot relocation 
mbus driver is initialized from arch_cpu_init() callback which is called
before relocation. This driver stores lot of functions and structure
pointers into global variables, so it is data position dependent.

Therefore after relocations all pointers are invalid and driver does not
work anymore as all pointers referes to the old memory, which overlaps with
CONFIG_SYS_LOAD_ADDR and ${loadaddr}.

For example U-Boot fuse command crashes if loadaddr memory is cleared or
rewritten by some image loaded by U-Boot load command.

  mw.w ${loadaddr} 0x0 10000
  fuse read 0 1 2

Fix this issue by removing of all mbus global variables in which are stored
pointers to structures or functions which changes during relocation. And
replace it by direct function calls (not via pointers). With this change
fuse command finally works.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Reviewed-by: Stefan Roese <sr@denx.de>
2022-08-23 12:35:37 +02:00

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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2015-2019 Stefan Roese <sr@denx.de>
*/
#include <common.h>
#include <command.h>
#include <console.h>
#include <dm.h>
#include <i2c.h>
#include <init.h>
#include <net.h>
#include <pci.h>
#if !defined(CONFIG_SPL_BUILD)
#include <bootcount.h>
#endif
#include <asm/global_data.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <asm/arch/cpu.h>
#include <asm/arch/soc.h>
#include <linux/delay.h>
#include <linux/mbus.h>
#ifdef CONFIG_NET
#include <netdev.h>
#endif
#include <u-boot/crc.h>
#include "theadorable.h"
#include "../drivers/ddr/marvell/axp/ddr3_hw_training.h"
#include "../arch/arm/mach-mvebu/serdes/axp/high_speed_env_spec.h"
DECLARE_GLOBAL_DATA_PTR;
#define MV_USB_PHY_BASE (MVEBU_AXP_USB_BASE + 0x800)
#define PHY_CHANNEL_RX_CTRL0_REG(port, chan) \
(MV_USB_PHY_BASE + ((port) << 12) + ((chan) << 6) + 0x8)
#define THEADORABLE_GPP_OUT_ENA_LOW 0x00336780
#define THEADORABLE_GPP_OUT_ENA_MID 0x00003cf0
#define THEADORABLE_GPP_OUT_ENA_HIGH (~(0x0))
#define THEADORABLE_GPP_OUT_VAL_LOW 0x2c0c983f
#define THEADORABLE_GPP_OUT_VAL_MID 0x0007000c
#define THEADORABLE_GPP_OUT_VAL_HIGH 0x00000000
#define GPIO_USB0_PWR_ON 18
#define GPIO_USB1_PWR_ON 19
#define PEX_SWITCH_NOT_FOUNT_LIMIT 3
#define STM_I2C_BUS 1
#define STM_I2C_ADDR 0x27
#define REBOOT_DELAY 1000 /* reboot-delay in ms */
#define ABORT_TIMEOUT 3000 /* 3 seconds reboot abort timeout */
/* DDR3 static configuration */
static MV_DRAM_MC_INIT ddr3_theadorable[MV_MAX_DDR3_STATIC_SIZE] = {
{0x00001400, 0x7301ca28}, /* DDR SDRAM Configuration Register */
{0x00001404, 0x30000800}, /* Dunit Control Low Register */
{0x00001408, 0x44149887}, /* DDR SDRAM Timing (Low) Register */
{0x0000140C, 0x38d93fc7}, /* DDR SDRAM Timing (High) Register */
{0x00001410, 0x1b100001}, /* DDR SDRAM Address Control Register */
{0x00001424, 0x0000f3ff}, /* Dunit Control High Register */
{0x00001428, 0x000f8830}, /* ODT Timing (Low) Register */
{0x0000142C, 0x014c50f4}, /* DDR3 Timing Register */
{0x0000147C, 0x0000c671}, /* ODT Timing (High) Register */
{0x00001494, 0x00010000}, /* DDR SDRAM ODT Control (Low) Reg */
{0x0000149C, 0x00000001}, /* DDR Dunit ODT Control Register */
{0x000014A0, 0x00000001}, /* DRAM FIFO Control Register */
{0x000014A8, 0x00000101}, /* AXI Control Register */
/*
* DO NOT Modify - Open Mbus Window - 2G - Mbus is required for the
* training sequence
*/
{0x000200e8, 0x3fff0e01},
{0x00020184, 0x3fffffe0}, /* Close fast path Window to - 2G */
{0x0001504, 0x7fffffe1}, /* CS0 Size */
{0x000150C, 0x00000000}, /* CS1 Size */
{0x0001514, 0x00000000}, /* CS2 Size */
{0x000151C, 0x00000000}, /* CS3 Size */
{0x00020220, 0x00000007}, /* Reserved */
{0x00001538, 0x00000009}, /* Read Data Sample Delays Register */
{0x0000153C, 0x00000009}, /* Read Data Ready Delay Register */
{0x000015D0, 0x00000650}, /* MR0 */
{0x000015D4, 0x00000044}, /* MR1 */
{0x000015D8, 0x00000010}, /* MR2 */
{0x000015DC, 0x00000000}, /* MR3 */
{0x000015E0, 0x00000001},
{0x000015E4, 0x00203c18}, /* ZQDS Configuration Register */
{0x000015EC, 0xf800a225}, /* DDR PHY */
/* Recommended Settings from Marvell for 4 x 16 bit devices: */
{0x000014C0, 0x192424c9}, /* DRAM addr and Ctrl Driving Strenght*/
{0x000014C4, 0x0aaa24c9}, /* DRAM Data and DQS Driving Strenght */
{0x0, 0x0}
};
static MV_DRAM_MODES board_ddr_modes[MV_DDR3_MODES_NUMBER] = {
{"theadorable_1333-667", 0x3, 0x5, 0x0, A0, ddr3_theadorable, NULL},
};
extern MV_SERDES_CHANGE_M_PHY serdes_change_m_phy[];
/*
* Lane0 - PCIE0.0 X1 (to WIFI Module)
* Lane5 - SATA0
* Lane6 - SATA1
* Lane7 - SGMII0 (to Ethernet Phy)
* Lane8-11 - PCIE2.0 X4 (to PEX Switch)
* all other lanes are disabled
*/
MV_BIN_SERDES_CFG theadorable_serdes_cfg[] = {
{ MV_PEX_ROOT_COMPLEX, 0x22200001, 0x00001111,
{ PEX_BUS_MODE_X1, PEX_BUS_DISABLED, PEX_BUS_MODE_X4,
PEX_BUS_DISABLED },
0x0060, serdes_change_m_phy
},
};
/*
* Define a board-specific detection pulse-width array for the SerDes PCIe
* interfaces. If not defined in the board code, the default of currently 2
* is used. Values from 0...3 are possible (2 bits).
*/
u8 serdes_pex_pulse_width[4] = { 0, 2, 2, 2 };
MV_DRAM_MODES *ddr3_get_static_ddr_mode(void)
{
/* Only one mode supported for this board */
return &board_ddr_modes[0];
}
MV_BIN_SERDES_CFG *board_serdes_cfg_get(void)
{
return &theadorable_serdes_cfg[0];
}
u8 board_sat_r_get(u8 dev_num, u8 reg)
{
/* Bit x enables PCI 2.0 link capabilities instead of PCI 1.x */
return 0xe; /* PEX port 0 is PCIe Gen1, PEX port 1..3 PCIe Gen2 */
}
#define PCIE_LNK_CTRL_STAT_2_OFF 0x0090
#define PCIE_LNK_CTRL_STAT_2_DEEM_BIT BIT(6)
static void pcie_set_deemphasis(u32 base)
{
u32 reg;
reg = readl((void *)base + PCIE_LNK_CTRL_STAT_2_OFF);
reg |= PCIE_LNK_CTRL_STAT_2_DEEM_BIT;
writel(reg, (void *)base + PCIE_LNK_CTRL_STAT_2_OFF);
}
int board_early_init_f(void)
{
/* Configure MPP */
writel(0x00000000, MVEBU_MPP_BASE + 0x00);
writel(0x03300000, MVEBU_MPP_BASE + 0x04);
writel(0x00000033, MVEBU_MPP_BASE + 0x08);
writel(0x00000000, MVEBU_MPP_BASE + 0x0c);
writel(0x11110000, MVEBU_MPP_BASE + 0x10);
writel(0x00221100, MVEBU_MPP_BASE + 0x14);
writel(0x00000000, MVEBU_MPP_BASE + 0x18);
writel(0x00000000, MVEBU_MPP_BASE + 0x1c);
writel(0x00000000, MVEBU_MPP_BASE + 0x20);
/* Configure GPIO */
writel(THEADORABLE_GPP_OUT_VAL_LOW, MVEBU_GPIO0_BASE + 0x00);
writel(THEADORABLE_GPP_OUT_ENA_LOW, MVEBU_GPIO0_BASE + 0x04);
writel(THEADORABLE_GPP_OUT_VAL_MID, MVEBU_GPIO1_BASE + 0x00);
writel(THEADORABLE_GPP_OUT_ENA_MID, MVEBU_GPIO1_BASE + 0x04);
writel(THEADORABLE_GPP_OUT_VAL_HIGH, MVEBU_GPIO2_BASE + 0x00);
writel(THEADORABLE_GPP_OUT_ENA_HIGH, MVEBU_GPIO2_BASE + 0x04);
/*
* Set deephasis bit in the PCIe configuration of both PCIe ports
* used on this board.
*
* This needs to be done very early, even before the SERDES setup
* code is run. This way, the first link will already be established
* with this setup. Testing has shown, that this results in a more
* stable PCIe link with better signal quality.
*/
pcie_set_deemphasis(MVEBU_REG_PCIE_BASE); /* Port 0 */
pcie_set_deemphasis(MVEBU_REG_PCIE_BASE + 0x2000); /* Port 2 */
return 0;
}
int board_init(void)
{
int ret;
/* adress of boot parameters */
gd->bd->bi_boot_params = mvebu_sdram_bar(0) + 0x100;
/*
* Map SPI devices via MBUS so that they can be accessed via
* the SPI direct access mode
*/
mbus_dt_setup_win(SPI_BUS0_DEV1_BASE, SPI_BUS0_DEV1_SIZE,
CPU_TARGET_DEVICEBUS_BOOTROM_SPI, CPU_ATTR_SPI0_CS1);
mbus_dt_setup_win(SPI_BUS1_DEV2_BASE, SPI_BUS0_DEV1_SIZE,
CPU_TARGET_DEVICEBUS_BOOTROM_SPI, CPU_ATTR_SPI1_CS2);
/*
* Set RX Channel Control 0 Register:
* Tests have shown, that setting the LPF_COEF from 0 (1/8)
* to 3 (1/1) results in a more stable USB connection.
*/
setbits_le32(PHY_CHANNEL_RX_CTRL0_REG(0, 1), 0xc);
setbits_le32(PHY_CHANNEL_RX_CTRL0_REG(0, 2), 0xc);
setbits_le32(PHY_CHANNEL_RX_CTRL0_REG(0, 3), 0xc);
/* Toggle USB power */
ret = gpio_request(GPIO_USB0_PWR_ON, "USB0_PWR_ON");
if (ret < 0)
return ret;
gpio_direction_output(GPIO_USB0_PWR_ON, 0);
ret = gpio_request(GPIO_USB1_PWR_ON, "USB1_PWR_ON");
if (ret < 0)
return ret;
gpio_direction_output(GPIO_USB1_PWR_ON, 0);
mdelay(1);
gpio_set_value(GPIO_USB0_PWR_ON, 1);
gpio_set_value(GPIO_USB1_PWR_ON, 1);
return 0;
}
int checkboard(void)
{
board_fpga_add();
return 0;
}
#ifdef CONFIG_NET
int board_eth_init(struct bd_info *bis)
{
cpu_eth_init(bis); /* Built in controller(s) come first */
return pci_eth_init(bis);
}
#endif
#if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_BOARD_LATE_INIT)
int board_late_init(void)
{
pci_dev_t bdf;
ulong bootcount;
/*
* Check if the PEX switch is detected (somtimes its not available
* on the PCIe bus). In this case, try to recover by issuing a
* soft-reset or even a power-cycle, depending on the bootcounter
* value.
*/
bdf = pci_find_device(PCI_VENDOR_ID_PLX, 0x8619, 0);
if (bdf == -1) {
unsigned long start_time = get_timer(0);
u8 i2c_buf[8];
int ret;
/* PEX switch not found! */
bootcount = bootcount_load();
printf("Failed to find PLX PEX-switch (bootcount=%ld)\n",
bootcount);
/*
* The user can exit this boot-loop in the error case by
* hitting Ctrl-C. So wait some time for this key here.
*/
printf("Continue booting with Ctrl-C, otherwise rebooting\n");
do {
/* Handle control-c and timeouts */
if (ctrlc()) {
printf("PEX error boot-loop aborted!\n");
return 0;
}
} while (get_timer(start_time) < ABORT_TIMEOUT);
/*
* At this stage the bootcounter has not been incremented
* yet. We need to do this manually here to get an actually
* working bootcounter in this error case.
*/
bootcount_inc();
if (bootcount > PEX_SWITCH_NOT_FOUNT_LIMIT) {
struct udevice *dev;
printf("Issuing power-switch via uC!\n");
ret = i2c_get_chip_for_busnum(STM_I2C_BUS, STM_I2C_ADDR,
1, &dev);
if (ret) {
printf("Error selecting STM on I2C bus (ret=%d)\n",
ret);
printf("Issuing soft-reset...\n");
/* default handling: SOFT reset */
do_reset(NULL, 0, 0, NULL);
}
i2c_buf[0] = STM_I2C_ADDR << 1;
i2c_buf[1] = 0xc5; /* cmd */
i2c_buf[2] = 0x01; /* enable */
/* Delay before reboot */
i2c_buf[3] = REBOOT_DELAY & 0x00ff;
i2c_buf[4] = (REBOOT_DELAY & 0xff00) >> 8;
/* Delay before shutdown */
i2c_buf[5] = 0x00;
i2c_buf[6] = 0x00;
i2c_buf[7] = crc8(0x72, &i2c_buf[0], 7);
ret = dm_i2c_write(dev, 0, &i2c_buf[1], 7);
if (ret) {
printf("I2C write error (ret=%d)\n", ret);
printf("Issuing soft-reset...\n");
/* default handling: SOFT reset */
do_reset(NULL, 0, 0, NULL);
}
/* Wait for power-cycle to occur... */
printf("Waiting for power-cycle via uC...\n");
while (1)
;
} else {
printf("Issuing soft-reset...\n");
/* default handling: SOFT reset */
do_reset(NULL, 0, 0, NULL);
}
}
return 0;
}
#endif
#if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_PCI)
static int pcie_get_link_speed_width(pci_dev_t bdf, int *speed, int *width)
{
struct udevice *dev;
u16 ven_id, dev_id;
u16 lnksta;
int ret;
int pos;
/*
* Check if the PCIe device is detected (sometimes its not available
* on the PCIe bus)
*/
ret = dm_pci_bus_find_bdf(bdf, &dev);
if (ret)
return -ENODEV;
/* PCIe device found */
dm_pci_read_config16(dev, PCI_VENDOR_ID, &ven_id);
dm_pci_read_config16(dev, PCI_DEVICE_ID, &dev_id);
printf("Detected PCIe device: VendorID 0x%04x DeviceId 0x%04x @ BDF %d.%d.%d\n",
ven_id, dev_id, PCI_BUS(bdf), PCI_DEV(bdf), PCI_FUNC(bdf));
/* Now read EXP_LNKSTA register */
pos = dm_pci_find_capability(dev, PCI_CAP_ID_EXP);
dm_pci_read_config16(dev, pos + PCI_EXP_LNKSTA, &lnksta);
*speed = lnksta & PCI_EXP_LNKSTA_CLS;
*width = (lnksta & PCI_EXP_LNKSTA_NLW) >> PCI_EXP_LNKSTA_NLW_SHIFT;
return 0;
}
/*
* U-Boot cmd to test for the presence of the directly connected PCIe devices
* the theadorable board. This cmd can be used by U-Boot scripts for automated
* testing, if the PCIe setup is correct. Meaning, that all PCIe devices are
* correctly detected and the link speed and width is corrent.
*
* Here a short script that may be used for an automated test. It results in
* an endless reboot loop, if the PCIe devices are detected correctly. If at
* any time a problem is detected (PCIe device not available or link is
* incorrect), then booting will halt. So just use this "bootcmd" and let the
* board run over a longer time (e.g. one night) and if the board still reboots
* after this time, then everything is okay.
*
* bootcmd=echo bootcount=$bootcount; pcie ;if test $? -eq 0;
* then echo PCIe status okay, resetting...; reset; else;
* echo PCIe status NOT okay, hanging (bootcount=$bootcount); fi;
*/
int do_pcie_test(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
{
pci_dev_t bdf;
int speed;
int width;
int ret;
if (argc != 1)
return cmd_usage(cmdtp);
/*
* Check if the PCIe device is detected (sometimes its not available
* on the PCIe bus)
*/
/* Check for PCIe device on PCIe port/bus 0 */
bdf = PCI_BDF(0, 1, 0);
ret = pcie_get_link_speed_width(bdf, &speed, &width);
if (ret) {
/* PCIe device not found! */
printf("Failed to find PCIe device @ BDF %d.%d.%d\n",
PCI_BUS(bdf), PCI_DEV(bdf), PCI_FUNC(bdf));
return CMD_RET_FAILURE;
}
printf("Established speed=%d width=%d\n", speed, width);
if ((speed != 1 || width != 1)) {
printf("Detected incorrect speed/width!!!\n");
return CMD_RET_FAILURE;
}
/* Check for PCIe device on PCIe port/bus 1 */
bdf = PCI_BDF(1, 1, 0);
ret = pcie_get_link_speed_width(bdf, &speed, &width);
if (ret) {
/* PCIe device not found! */
printf("Failed to find PCIe device @ BDF %d.%d.%d\n",
PCI_BUS(bdf), PCI_DEV(bdf), PCI_FUNC(bdf));
return CMD_RET_FAILURE;
}
printf("Established speed=%d width=%d\n", speed, width);
if ((speed != 2 || width != 4)) {
printf("Detected incorrect speed/width!!!\n");
return CMD_RET_FAILURE;
}
return CMD_RET_SUCCESS;
}
U_BOOT_CMD(
pcie, 1, 0, do_pcie_test,
"Test for presence of a PCIe devices with correct link",
""
);
#endif
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