395 lines
12 KiB
C
Executable file
395 lines
12 KiB
C
Executable file
/*
|
|
* AXS101/AXS103 Software Development Platform
|
|
*
|
|
* Copyright (C) 2013-15 Synopsys, Inc. (www.synopsys.com)
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
*/
|
|
|
|
#include <linux/of_fdt.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/libfdt.h>
|
|
|
|
#include <asm/asm-offsets.h>
|
|
#include <asm/io.h>
|
|
#include <asm/mach_desc.h>
|
|
#include <soc/arc/mcip.h>
|
|
|
|
#define AXS_MB_CGU 0xE0010000
|
|
#define AXS_MB_CREG 0xE0011000
|
|
|
|
#define CREG_MB_IRQ_MUX (AXS_MB_CREG + 0x214)
|
|
#define CREG_MB_SW_RESET (AXS_MB_CREG + 0x220)
|
|
#define CREG_MB_VER (AXS_MB_CREG + 0x230)
|
|
#define CREG_MB_CONFIG (AXS_MB_CREG + 0x234)
|
|
|
|
#define AXC001_CREG 0xF0001000
|
|
#define AXC001_GPIO_INTC 0xF0003000
|
|
|
|
static void __init axs10x_enable_gpio_intc_wire(void)
|
|
{
|
|
/*
|
|
* Peripherals on CPU Card and Mother Board are wired to cpu intc via
|
|
* intermediate DW APB GPIO blocks (mainly for debouncing)
|
|
*
|
|
* ---------------------
|
|
* | snps,arc700-intc |
|
|
* ---------------------
|
|
* | #7 | #15
|
|
* ------------------- -------------------
|
|
* | snps,dw-apb-gpio | | snps,dw-apb-gpio |
|
|
* ------------------- -------------------
|
|
* | #12 |
|
|
* | [ Debug UART on cpu card ]
|
|
* |
|
|
* ------------------------
|
|
* | snps,dw-apb-intc (MB)|
|
|
* ------------------------
|
|
* | | | |
|
|
* [eth] [uart] [... other perip on Main Board]
|
|
*
|
|
* Current implementation of "irq-dw-apb-ictl" driver doesn't work well
|
|
* with stacked INTCs. In particular problem happens if its master INTC
|
|
* not yet instantiated. See discussion here -
|
|
* https://lkml.org/lkml/2015/3/4/755
|
|
*
|
|
* So setup the first gpio block as a passive pass thru and hide it from
|
|
* DT hardware topology - connect MB intc directly to cpu intc
|
|
* The GPIO "wire" needs to be init nevertheless (here)
|
|
*
|
|
* One side adv is that peripheral interrupt handling avoids one nested
|
|
* intc ISR hop
|
|
*/
|
|
#define GPIO_INTEN (AXC001_GPIO_INTC + 0x30)
|
|
#define GPIO_INTMASK (AXC001_GPIO_INTC + 0x34)
|
|
#define GPIO_INTTYPE_LEVEL (AXC001_GPIO_INTC + 0x38)
|
|
#define GPIO_INT_POLARITY (AXC001_GPIO_INTC + 0x3c)
|
|
#define MB_TO_GPIO_IRQ 12
|
|
|
|
iowrite32(~(1 << MB_TO_GPIO_IRQ), (void __iomem *) GPIO_INTMASK);
|
|
iowrite32(0, (void __iomem *) GPIO_INTTYPE_LEVEL);
|
|
iowrite32(~0, (void __iomem *) GPIO_INT_POLARITY);
|
|
iowrite32(1 << MB_TO_GPIO_IRQ, (void __iomem *) GPIO_INTEN);
|
|
}
|
|
|
|
static void __init axs10x_print_board_ver(unsigned int creg, const char *str)
|
|
{
|
|
union ver {
|
|
struct {
|
|
#ifdef CONFIG_CPU_BIG_ENDIAN
|
|
unsigned int pad:11, y:12, m:4, d:5;
|
|
#else
|
|
unsigned int d:5, m:4, y:12, pad:11;
|
|
#endif
|
|
};
|
|
unsigned int val;
|
|
} board;
|
|
|
|
board.val = ioread32((void __iomem *)creg);
|
|
pr_info("AXS: %s FPGA Date: %u-%u-%u\n", str, board.d, board.m,
|
|
board.y);
|
|
}
|
|
|
|
static void __init axs10x_early_init(void)
|
|
{
|
|
int mb_rev;
|
|
char mb[32];
|
|
|
|
/* Determine motherboard version */
|
|
if (ioread32((void __iomem *) CREG_MB_CONFIG) & (1 << 28))
|
|
mb_rev = 3; /* HT-3 (rev3.0) */
|
|
else
|
|
mb_rev = 2; /* HT-2 (rev2.0) */
|
|
|
|
axs10x_enable_gpio_intc_wire();
|
|
|
|
scnprintf(mb, 32, "MainBoard v%d", mb_rev);
|
|
axs10x_print_board_ver(CREG_MB_VER, mb);
|
|
}
|
|
|
|
#ifdef CONFIG_AXS101
|
|
|
|
#define CREG_CPU_ADDR_770 (AXC001_CREG + 0x20)
|
|
#define CREG_CPU_ADDR_TUNN (AXC001_CREG + 0x60)
|
|
#define CREG_CPU_ADDR_770_UPD (AXC001_CREG + 0x34)
|
|
#define CREG_CPU_ADDR_TUNN_UPD (AXC001_CREG + 0x74)
|
|
|
|
#define CREG_CPU_ARC770_IRQ_MUX (AXC001_CREG + 0x114)
|
|
#define CREG_CPU_GPIO_UART_MUX (AXC001_CREG + 0x120)
|
|
|
|
/*
|
|
* Set up System Memory Map for ARC cpu / peripherals controllers
|
|
*
|
|
* Each AXI master has a 4GB memory map specified as 16 apertures of 256MB, each
|
|
* of which maps to a corresponding 256MB aperture in Target slave memory map.
|
|
*
|
|
* e.g. ARC cpu AXI Master's aperture 8 (0x8000_0000) is mapped to aperture 0
|
|
* (0x0000_0000) of DDR Port 0 (slave #1)
|
|
*
|
|
* Access from cpu to MB controllers such as GMAC is setup using AXI Tunnel:
|
|
* which has master/slaves on both ends.
|
|
* e.g. aperture 14 (0xE000_0000) of ARC cpu is mapped to aperture 14
|
|
* (0xE000_0000) of CPU Card AXI Tunnel slave (slave #3) which is mapped to
|
|
* MB AXI Tunnel Master, which also has a mem map setup
|
|
*
|
|
* In the reverse direction, MB AXI Masters (e.g. GMAC) mem map is setup
|
|
* to map to MB AXI Tunnel slave which connects to CPU Card AXI Tunnel Master
|
|
*/
|
|
struct aperture {
|
|
unsigned int slave_sel:4, slave_off:4, pad:24;
|
|
};
|
|
|
|
/* CPU Card target slaves */
|
|
#define AXC001_SLV_NONE 0
|
|
#define AXC001_SLV_DDR_PORT0 1
|
|
#define AXC001_SLV_SRAM 2
|
|
#define AXC001_SLV_AXI_TUNNEL 3
|
|
#define AXC001_SLV_AXI2APB 6
|
|
#define AXC001_SLV_DDR_PORT1 7
|
|
|
|
/* MB AXI Target slaves */
|
|
#define AXS_MB_SLV_NONE 0
|
|
#define AXS_MB_SLV_AXI_TUNNEL_CPU 1
|
|
#define AXS_MB_SLV_AXI_TUNNEL_HAPS 2
|
|
#define AXS_MB_SLV_SRAM 3
|
|
#define AXS_MB_SLV_CONTROL 4
|
|
|
|
/* MB AXI masters */
|
|
#define AXS_MB_MST_TUNNEL_CPU 0
|
|
#define AXS_MB_MST_USB_OHCI 10
|
|
|
|
/*
|
|
* memmap for ARC core on CPU Card
|
|
*/
|
|
static const struct aperture axc001_memmap[16] = {
|
|
{AXC001_SLV_AXI_TUNNEL, 0x0},
|
|
{AXC001_SLV_AXI_TUNNEL, 0x1},
|
|
{AXC001_SLV_SRAM, 0x0}, /* 0x2000_0000: Local SRAM */
|
|
{AXC001_SLV_NONE, 0x0},
|
|
{AXC001_SLV_NONE, 0x0},
|
|
{AXC001_SLV_NONE, 0x0},
|
|
{AXC001_SLV_NONE, 0x0},
|
|
{AXC001_SLV_NONE, 0x0},
|
|
{AXC001_SLV_DDR_PORT0, 0x0}, /* 0x8000_0000: DDR 0..256M */
|
|
{AXC001_SLV_DDR_PORT0, 0x1}, /* 0x9000_0000: DDR 256..512M */
|
|
{AXC001_SLV_DDR_PORT0, 0x2},
|
|
{AXC001_SLV_DDR_PORT0, 0x3},
|
|
{AXC001_SLV_NONE, 0x0},
|
|
{AXC001_SLV_AXI_TUNNEL, 0xD},
|
|
{AXC001_SLV_AXI_TUNNEL, 0xE}, /* MB: CREG, CGU... */
|
|
{AXC001_SLV_AXI2APB, 0x0}, /* CPU Card local CREG, CGU... */
|
|
};
|
|
|
|
/*
|
|
* memmap for CPU Card AXI Tunnel Master (for access by MB controllers)
|
|
* GMAC (MB) -> MB AXI Tunnel slave -> CPU Card AXI Tunnel Master -> DDR
|
|
*/
|
|
static const struct aperture axc001_axi_tunnel_memmap[16] = {
|
|
{AXC001_SLV_AXI_TUNNEL, 0x0},
|
|
{AXC001_SLV_AXI_TUNNEL, 0x1},
|
|
{AXC001_SLV_SRAM, 0x0},
|
|
{AXC001_SLV_NONE, 0x0},
|
|
{AXC001_SLV_NONE, 0x0},
|
|
{AXC001_SLV_NONE, 0x0},
|
|
{AXC001_SLV_NONE, 0x0},
|
|
{AXC001_SLV_NONE, 0x0},
|
|
{AXC001_SLV_DDR_PORT1, 0x0},
|
|
{AXC001_SLV_DDR_PORT1, 0x1},
|
|
{AXC001_SLV_DDR_PORT1, 0x2},
|
|
{AXC001_SLV_DDR_PORT1, 0x3},
|
|
{AXC001_SLV_NONE, 0x0},
|
|
{AXC001_SLV_AXI_TUNNEL, 0xD},
|
|
{AXC001_SLV_AXI_TUNNEL, 0xE},
|
|
{AXC001_SLV_AXI2APB, 0x0},
|
|
};
|
|
|
|
/*
|
|
* memmap for MB AXI Masters
|
|
* Same mem map for all perip controllers as well as MB AXI Tunnel Master
|
|
*/
|
|
static const struct aperture axs_mb_memmap[16] = {
|
|
{AXS_MB_SLV_SRAM, 0x0},
|
|
{AXS_MB_SLV_SRAM, 0x0},
|
|
{AXS_MB_SLV_NONE, 0x0},
|
|
{AXS_MB_SLV_NONE, 0x0},
|
|
{AXS_MB_SLV_NONE, 0x0},
|
|
{AXS_MB_SLV_NONE, 0x0},
|
|
{AXS_MB_SLV_NONE, 0x0},
|
|
{AXS_MB_SLV_NONE, 0x0},
|
|
{AXS_MB_SLV_AXI_TUNNEL_CPU, 0x8}, /* DDR on CPU Card */
|
|
{AXS_MB_SLV_AXI_TUNNEL_CPU, 0x9}, /* DDR on CPU Card */
|
|
{AXS_MB_SLV_AXI_TUNNEL_CPU, 0xA},
|
|
{AXS_MB_SLV_AXI_TUNNEL_CPU, 0xB},
|
|
{AXS_MB_SLV_NONE, 0x0},
|
|
{AXS_MB_SLV_AXI_TUNNEL_HAPS, 0xD},
|
|
{AXS_MB_SLV_CONTROL, 0x0}, /* MB Local CREG, CGU... */
|
|
{AXS_MB_SLV_AXI_TUNNEL_CPU, 0xF},
|
|
};
|
|
|
|
static noinline void __init
|
|
axs101_set_memmap(void __iomem *base, const struct aperture map[16])
|
|
{
|
|
unsigned int slave_select, slave_offset;
|
|
int i;
|
|
|
|
slave_select = slave_offset = 0;
|
|
for (i = 0; i < 8; i++) {
|
|
slave_select |= map[i].slave_sel << (i << 2);
|
|
slave_offset |= map[i].slave_off << (i << 2);
|
|
}
|
|
|
|
iowrite32(slave_select, base + 0x0); /* SLV0 */
|
|
iowrite32(slave_offset, base + 0x8); /* OFFSET0 */
|
|
|
|
slave_select = slave_offset = 0;
|
|
for (i = 0; i < 8; i++) {
|
|
slave_select |= map[i+8].slave_sel << (i << 2);
|
|
slave_offset |= map[i+8].slave_off << (i << 2);
|
|
}
|
|
|
|
iowrite32(slave_select, base + 0x4); /* SLV1 */
|
|
iowrite32(slave_offset, base + 0xC); /* OFFSET1 */
|
|
}
|
|
|
|
static void __init axs101_early_init(void)
|
|
{
|
|
int i;
|
|
|
|
/* ARC 770D memory view */
|
|
axs101_set_memmap((void __iomem *) CREG_CPU_ADDR_770, axc001_memmap);
|
|
iowrite32(1, (void __iomem *) CREG_CPU_ADDR_770_UPD);
|
|
|
|
/* AXI tunnel memory map (incoming traffic from MB into CPU Card */
|
|
axs101_set_memmap((void __iomem *) CREG_CPU_ADDR_TUNN,
|
|
axc001_axi_tunnel_memmap);
|
|
iowrite32(1, (void __iomem *) CREG_CPU_ADDR_TUNN_UPD);
|
|
|
|
/* MB peripherals memory map */
|
|
for (i = AXS_MB_MST_TUNNEL_CPU; i <= AXS_MB_MST_USB_OHCI; i++)
|
|
axs101_set_memmap((void __iomem *) AXS_MB_CREG + (i << 4),
|
|
axs_mb_memmap);
|
|
|
|
iowrite32(0x3ff, (void __iomem *) AXS_MB_CREG + 0x100); /* Update */
|
|
|
|
/* GPIO pins 18 and 19 are used as UART rx and tx, respectively. */
|
|
iowrite32(0x01, (void __iomem *) CREG_CPU_GPIO_UART_MUX);
|
|
|
|
/* Set up the MB interrupt system: mux interrupts to GPIO7) */
|
|
iowrite32(0x01, (void __iomem *) CREG_MB_IRQ_MUX);
|
|
|
|
/* reset ethernet and ULPI interfaces */
|
|
iowrite32(0x18, (void __iomem *) CREG_MB_SW_RESET);
|
|
|
|
/* map GPIO 14:10 to ARC 9:5 (IRQ mux change for MB v2 onwards) */
|
|
iowrite32(0x52, (void __iomem *) CREG_CPU_ARC770_IRQ_MUX);
|
|
|
|
axs10x_early_init();
|
|
}
|
|
|
|
#endif /* CONFIG_AXS101 */
|
|
|
|
#ifdef CONFIG_AXS103
|
|
|
|
#define AXC003_CREG 0xF0001000
|
|
#define AXC003_MST_AXI_TUNNEL 0
|
|
#define AXC003_MST_HS38 1
|
|
|
|
#define CREG_CPU_AXI_M0_IRQ_MUX (AXC003_CREG + 0x440)
|
|
#define CREG_CPU_GPIO_UART_MUX (AXC003_CREG + 0x480)
|
|
#define CREG_CPU_TUN_IO_CTRL (AXC003_CREG + 0x494)
|
|
|
|
|
|
static void __init axs103_early_init(void)
|
|
{
|
|
#ifdef CONFIG_ARC_MCIP
|
|
/*
|
|
* AXS103 configurations for SMP/QUAD configurations share device tree
|
|
* which defaults to 100 MHz. However recent failures of Quad config
|
|
* revealed P&R timing violations so clamp it down to safe 50 MHz
|
|
* Instead of duplicating defconfig/DT for SMP/QUAD, add a small hack
|
|
* of fudging the freq in DT
|
|
*/
|
|
#define AXS103_QUAD_CORE_CPU_FREQ_HZ 50000000
|
|
|
|
unsigned int num_cores = (read_aux_reg(ARC_REG_MCIP_BCR) >> 16) & 0x3F;
|
|
if (num_cores > 2) {
|
|
u32 freq;
|
|
int off = fdt_path_offset(initial_boot_params, "/cpu_card/core_clk");
|
|
const struct fdt_property *prop;
|
|
|
|
prop = fdt_get_property(initial_boot_params, off,
|
|
"assigned-clock-rates", NULL);
|
|
freq = be32_to_cpu(*(u32 *)(prop->data));
|
|
|
|
/* Patching .dtb in-place with new core clock value */
|
|
if (freq != AXS103_QUAD_CORE_CPU_FREQ_HZ) {
|
|
freq = cpu_to_be32(AXS103_QUAD_CORE_CPU_FREQ_HZ);
|
|
fdt_setprop_inplace(initial_boot_params, off,
|
|
"assigned-clock-rates", &freq, sizeof(freq));
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* Memory maps already config in pre-bootloader */
|
|
|
|
/* set GPIO mux to UART */
|
|
iowrite32(0x01, (void __iomem *) CREG_CPU_GPIO_UART_MUX);
|
|
|
|
iowrite32((0x00100000U | 0x000C0000U | 0x00003322U),
|
|
(void __iomem *) CREG_CPU_TUN_IO_CTRL);
|
|
|
|
/* Set up the AXS_MB interrupt system.*/
|
|
iowrite32(12, (void __iomem *) (CREG_CPU_AXI_M0_IRQ_MUX
|
|
+ (AXC003_MST_HS38 << 2)));
|
|
|
|
/* connect ICTL - Main Board with GPIO line */
|
|
iowrite32(0x01, (void __iomem *) CREG_MB_IRQ_MUX);
|
|
|
|
axs10x_print_board_ver(AXC003_CREG + 4088, "AXC003 CPU Card");
|
|
|
|
axs10x_early_init();
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_AXS101
|
|
|
|
static const char *axs101_compat[] __initconst = {
|
|
"snps,axs101",
|
|
NULL,
|
|
};
|
|
|
|
MACHINE_START(AXS101, "axs101")
|
|
.dt_compat = axs101_compat,
|
|
.init_early = axs101_early_init,
|
|
MACHINE_END
|
|
|
|
#endif /* CONFIG_AXS101 */
|
|
|
|
#ifdef CONFIG_AXS103
|
|
|
|
static const char *axs103_compat[] __initconst = {
|
|
"snps,axs103",
|
|
NULL,
|
|
};
|
|
|
|
MACHINE_START(AXS103, "axs103")
|
|
.dt_compat = axs103_compat,
|
|
.init_early = axs103_early_init,
|
|
MACHINE_END
|
|
|
|
/*
|
|
* For the VDK OS-kit, to get the offset to pid and command fields
|
|
*/
|
|
char coware_swa_pid_offset[TASK_PID];
|
|
char coware_swa_comm_offset[TASK_COMM];
|
|
|
|
#endif /* CONFIG_AXS103 */
|