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linux-stable/arch/arc/plat-axs10x/axs10x.c
Eugeniy Paltsev fbd1cec570 ARC: [plat-axs103]: Set initial core pll output frequency 
Set initial core pll output frequency specified in device tree to
100MHz for SMP configuration and 90MHz for UP configuration.
It will be applied at the core pll driver probing.

Update platform quirk for decreasing core frequency for quad core
configuration.

Acked-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2017-12-20 12:41:45 -08:00

392 lines
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/*
* 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
*/
unsigned int num_cores = (read_aux_reg(ARC_REG_MCIP_BCR) >> 16) & 0x3F;
if (num_cores > 2) {
u32 freq = 50, orig;
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);
orig = be32_to_cpu(*(u32*)(prop->data)) / 1000000;
/* Patching .dtb in-place with new core clock value */
if (freq != orig ) {
freq = cpu_to_be32(freq * 1000000);
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 */
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