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Preparation work for supporting the AR91xx and AR724x.

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* Implement a SoC probe function, from Linux, which determines the
  SoC family, type and revision. This only probes the AR71xx series
  SoC and (currently) panics on others.

* Migrate some of the AR71XX specific hardware init (USB device, determining
  system frequencies) into using the cpuops introduced in an earlier commit.
  Other SoC specific hardware stuff (per-device flush/WB, GPIO pin wiring,
  Ethernet PLL setup, other things I've likely missed) will be introduced in
  subsequent commits.

Reviewed by:	imp@
Obtained from:	(partially) Linux
This commit is contained in:
Adrian Chadd 2010-08-19 02:03:12 +00:00
parent c38fa7e016
commit 70bd9230d1
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=211476
10 changed files with 417 additions and 32 deletions
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180
sys/mips/atheros/ar71xx_chip.c Normal file
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@ -0,0 +1,180 @@
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <machine/cpuregs.h>
#include <mips/sentry5/s5reg.h>
#include "opt_ddb.h"
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/cons.h>
#include <sys/kdb.h>
#include <sys/reboot.h>
#include <vm/vm.h>
#include <vm/vm_page.h>
#include <net/ethernet.h>
#include <machine/clock.h>
#include <machine/cpu.h>
#include <machine/hwfunc.h>
#include <machine/md_var.h>
#include <machine/trap.h>
#include <machine/vmparam.h>
#include <mips/atheros/ar71xxreg.h>
#include <mips/atheros/ar71xx_chip.h>
#include <mips/atheros/ar71xx_cpudef.h>
/* XXX these should replace the current definitions in ar71xxreg.h */
/* XXX perhaps an ar71xx_chip.h header file? */
#define AR71XX_PLL_REG_CPU_CONFIG AR71XX_PLL_CPU_BASE + 0x00
#define AR71XX_PLL_REG_SEC_CONFIG AR71XX_PLL_CPU_BASE + 0x04
#define AR71XX_PLL_REG_ETH0_INT_CLOCK AR71XX_PLL_CPU_BASE + 0x10
#define AR71XX_PLL_REG_ETH1_INT_CLOCK AR71XX_PLL_CPU_BASE + 0x14
#define AR71XX_PLL_DIV_SHIFT 3
#define AR71XX_PLL_DIV_MASK 0x1f
#define AR71XX_CPU_DIV_SHIFT 16
#define AR71XX_CPU_DIV_MASK 0x3
#define AR71XX_DDR_DIV_SHIFT 18
#define AR71XX_DDR_DIV_MASK 0x3
#define AR71XX_AHB_DIV_SHIFT 20
#define AR71XX_AHB_DIV_MASK 0x7
#define AR71XX_ETH0_PLL_SHIFT 17
#define AR71XX_ETH1_PLL_SHIFT 19
/* XXX these shouldn't be in here - this file is a per-chip file */
/* XXX these should be in the top-level ar71xx type, not ar71xx -chip */
uint32_t u_ar71xx_cpu_freq;
uint32_t u_ar71xx_ahb_freq;
uint32_t u_ar71xx_ddr_freq;
static void
ar71xx_chip_detect_mem_size(void)
{
}
static void
ar71xx_chip_detect_sys_frequency(void)
{
uint32_t pll;
uint32_t freq;
uint32_t div;
pll = ATH_READ_REG(AR71XX_PLL_REG_CPU_CONFIG);
div = ((pll >> AR71XX_PLL_DIV_SHIFT) & AR71XX_PLL_DIV_MASK) + 1;
freq = div * AR71XX_BASE_FREQ;
div = ((pll >> AR71XX_CPU_DIV_SHIFT) & AR71XX_CPU_DIV_MASK) + 1;
u_ar71xx_cpu_freq = freq / div;
div = ((pll >> AR71XX_DDR_DIV_SHIFT) & AR71XX_DDR_DIV_MASK) + 1;
u_ar71xx_ddr_freq = freq / div;
div = (((pll >> AR71XX_AHB_DIV_SHIFT) & AR71XX_AHB_DIV_MASK) + 1) * 2;
u_ar71xx_ahb_freq = u_ar71xx_cpu_freq / div;
}
/*
* This does not lock the CPU whilst doing the work!
*/
static void
ar71xx_chip_device_stop(uint32_t mask)
{
uint32_t reg;
reg = ATH_READ_REG(AR71XX_RST_RESET);
ATH_WRITE_REG(AR71XX_RST_RESET, reg | mask);
}
static void
ar71xx_chip_device_start(uint32_t mask)
{
uint32_t reg;
reg = ATH_READ_REG(AR71XX_RST_RESET);
ATH_WRITE_REG(AR71XX_RST_RESET, reg & ~mask);
}
static int
ar71xx_chip_device_stopped(uint32_t mask)
{
uint32_t reg;
reg = ATH_READ_REG(AR71XX_RST_RESET);
return ((reg & mask) == mask);
}
static void
ar71xx_chip_set_pll_ge0(int speed)
{
}
static void
ar71xx_chip_set_pll_ge1(int speed)
{
}
static void
ar71xx_chip_ddr_flush_ge0(void)
{
ar71xx_ddr_flush(AR71XX_WB_FLUSH_GE0);
}
static void
ar71xx_chip_ddr_flush_ge1(void)
{
ar71xx_ddr_flush(AR71XX_WB_FLUSH_GE1);
}
static uint32_t
ar71xx_chip_get_eth_pll(unsigned int mac, int speed)
{
return 0;
}
static void
ar71xx_chip_init_usb_peripheral(void)
{
ar71xx_device_stop(RST_RESET_USB_OHCI_DLL | RST_RESET_USB_HOST | RST_RESET_USB_PHY);
DELAY(1000);
ar71xx_device_start(RST_RESET_USB_OHCI_DLL | RST_RESET_USB_HOST | RST_RESET_USB_PHY);
DELAY(1000);
ATH_WRITE_REG(AR71XX_USB_CTRL_CONFIG,
USB_CTRL_CONFIG_OHCI_DES_SWAP | USB_CTRL_CONFIG_OHCI_BUF_SWAP |
USB_CTRL_CONFIG_EHCI_DES_SWAP | USB_CTRL_CONFIG_EHCI_BUF_SWAP);
ATH_WRITE_REG(AR71XX_USB_CTRL_FLADJ,
(32 << USB_CTRL_FLADJ_HOST_SHIFT) | (3 << USB_CTRL_FLADJ_A5_SHIFT));
DELAY(1000);
}
struct ar71xx_cpu_def ar71xx_chip_def = {
&ar71xx_chip_detect_mem_size,
&ar71xx_chip_detect_sys_frequency,
&ar71xx_chip_device_stop,
&ar71xx_chip_device_start,
&ar71xx_chip_device_stopped,
&ar71xx_chip_set_pll_ge0,
&ar71xx_chip_set_pll_ge1,
&ar71xx_chip_ddr_flush_ge0,
&ar71xx_chip_ddr_flush_ge1,
&ar71xx_chip_get_eth_pll,
NULL,
&ar71xx_chip_init_usb_peripheral,
};

34
sys/mips/atheros/ar71xx_chip.h Normal file
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@ -0,0 +1,34 @@
/*-
* Copyright (c) 2010 Adrian Chadd
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/* $FreeBSD$ */
#ifndef __AR71XX_CHIP_H__
#define __AR71XX_CHIP_H__
extern struct ar71xx_cpu_def ar71xx_chip_def;
#endif

13
sys/mips/atheros/ar71xx_machdep.c
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@ -57,6 +57,9 @@ __FBSDID("$FreeBSD$");
#include <mips/atheros/ar71xxreg.h>
#include <mips/atheros/ar71xx_setup.h>
#include <mips/atheros/ar71xx_cpudef.h>
extern char edata[], end[];
uint32_t ar711_base_mac[ETHER_ADDR_LEN];
@ -202,11 +205,21 @@ platform_start(__register_t a0 __unused, __register_t a1 __unused,
* should be called first.
*/
init_param1();
/* Detect the system type - this is needed for subsequent chipset-specific calls */
ar71xx_detect_sys_type();
ar71xx_detect_sys_frequency();
platform_counter_freq = ar71xx_cpu_freq();
mips_timer_init_params(platform_counter_freq, 1);
cninit();
init_static_kenv(boot1_env, sizeof(boot1_env));
printf("CPU platform: %s\n", ar71xx_get_system_type());
printf("CPU Frequency=%d MHz\n", u_ar71xx_cpu_freq / 1000000);
printf("CPU DDR Frequency=%d MHz\n", u_ar71xx_ddr_freq / 1000000);
printf("CPU AHB Frequency=%d MHz\n", u_ar71xx_ahb_freq / 1000000);
printf("platform frequency: %lld\n", platform_counter_freq);
printf("arguments: \n");
printf(" a0 = %08x\n", a0);

119
sys/mips/atheros/ar71xx_setup.c Normal file
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@ -0,0 +1,119 @@
/*-
* Copyright (c) 2010 Adrian Chadd
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <machine/cpuregs.h>
#include <mips/sentry5/s5reg.h>
#include "opt_ddb.h"
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/cons.h>
#include <sys/kdb.h>
#include <sys/reboot.h>
#include <vm/vm.h>
#include <vm/vm_page.h>
#include <net/ethernet.h>
#include <machine/clock.h>
#include <machine/cpu.h>
#include <machine/hwfunc.h>
#include <machine/md_var.h>
#include <machine/trap.h>
#include <machine/vmparam.h>
#include <mips/atheros/ar71xxreg.h>
#include <mips/atheros/ar71xx_setup.h>
#include <mips/atheros/ar71xx_cpudef.h>
#include <mips/atheros/ar71xx_chip.h>
#define AR71XX_SYS_TYPE_LEN 128
static char ar71xx_sys_type[AR71XX_SYS_TYPE_LEN];
enum ar71xx_soc_type ar71xx_soc;
struct ar71xx_cpu_def * ar71xx_cpu_ops = NULL;
void
ar71xx_detect_sys_type(void)
{
char *chip = "????";
uint32_t id;
uint32_t major;
uint32_t minor;
uint32_t rev = 0;
id = ATH_READ_REG(AR71XX_RST_RESET_REG_REV_ID);
major = id & REV_ID_MAJOR_MASK;
switch (major) {
case REV_ID_MAJOR_AR71XX:
minor = id & AR71XX_REV_ID_MINOR_MASK;
rev = id >> AR71XX_REV_ID_REVISION_SHIFT;
rev &= AR71XX_REV_ID_REVISION_MASK;
ar71xx_cpu_ops = &ar71xx_chip_def;
switch (minor) {
case AR71XX_REV_ID_MINOR_AR7130:
ar71xx_soc = AR71XX_SOC_AR7130;
chip = "7130";
break;
case AR71XX_REV_ID_MINOR_AR7141:
ar71xx_soc = AR71XX_SOC_AR7141;
chip = "7141";
break;
case AR71XX_REV_ID_MINOR_AR7161:
ar71xx_soc = AR71XX_SOC_AR7161;
chip = "7161";
break;
}
break;
default:
panic("ar71xx: unknown chip id:0x%08x\n", id);
}
sprintf(ar71xx_sys_type, "Atheros AR%s rev %u", chip, rev);
}
const char *
ar71xx_get_system_type(void)
{
return ar71xx_sys_type;
}

48
sys/mips/atheros/ar71xx_setup.h Normal file
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@ -0,0 +1,48 @@
/*-
* Copyright (c) 2010 Adrian Chadd
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/* $FreeBSD$ */
#ifndef __AR71XX_SETUP_H__
#define __AR71XX_SETUP_H__
enum ar71xx_soc_type {
AR71XX_SOC_UNKNOWN,
AR71XX_SOC_AR7130,
AR71XX_SOC_AR7141,
AR71XX_SOC_AR7161,
AR71XX_SOC_AR7240,
AR71XX_SOC_AR7241,
AR71XX_SOC_AR7242,
AR71XX_SOC_AR9130,
AR71XX_SOC_AR9132
};
extern enum ar71xx_soc_type ar71xx_soc;
extern void ar71xx_detect_sys_type(void);
extern const char *ar71xx_get_system_type(void);
#endif

1
sys/mips/atheros/ar71xx_wdog.c
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@ -41,6 +41,7 @@ __FBSDID("$FreeBSD$");
#include <sys/sysctl.h>
#include <mips/atheros/ar71xxreg.h>
#include <mips/atheros/ar71xx_cpudef.h>
struct ar71xx_wdog_softc {
device_t dev;

50
sys/mips/atheros/ar71xxreg.h
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@ -161,6 +161,7 @@
#define GPIO_FUNC_USB_CLK_EN (0)
#define AR71XX_BASE_FREQ 40000000
#define AR71XX_PLL_CPU_BASE 0x18050000
#define AR71XX_PLL_CPU_CONFIG 0x18050000
#define PLL_SW_UPDATE (1 << 31)
#define PLL_LOCKED (1 << 30)
@ -235,6 +236,23 @@
#define RST_RESET_PCI_BUS (1 << 1)
#define RST_RESET_PCI_CORE (1 << 0)
/* Chipset revision details */
#define AR71XX_RST_RESET_REG_REV_ID 0x18060090
#define REV_ID_MAJOR_MASK 0xfff0
#define REV_ID_MAJOR_AR71XX 0x00a0
#define REV_ID_MAJOR_AR913X 0x00b0
#define REV_ID_MAJOR_AR7240 0x00c0
#define REV_ID_MAJOR_AR7241 0x0100
#define REV_ID_MAJOR_AR7242 0x1100
/* AR71XX chipset revision details */
#define AR71XX_REV_ID_MINOR_MASK 0x3
#define AR71XX_REV_ID_MINOR_AR7130 0x0
#define AR71XX_REV_ID_MINOR_AR7141 0x1
#define AR71XX_REV_ID_MINOR_AR7161 0x2
#define AR71XX_REV_ID_REVISION_MASK 0x3
#define AR71XX_REV_ID_REVISION_SHIFT 2
/*
* GigE adapters region
*/
@ -459,38 +477,6 @@
#define ATH_WRITE_REG(reg, val) \
*((volatile uint32_t *)MIPS_PHYS_TO_KSEG1((reg))) = (val)
static inline uint64_t
ar71xx_cpu_freq(void)
{
uint32_t pll_config, div;
uint64_t freq;
/* PLL freq */
pll_config = ATH_READ_REG(AR71XX_PLL_CPU_CONFIG);
div = ((pll_config >> PLL_FB_SHIFT) & PLL_FB_MASK) + 1;
freq = div * AR71XX_BASE_FREQ;
/* CPU freq */
div = ((pll_config >> PLL_CPU_DIV_SEL_SHIFT) & PLL_CPU_DIV_SEL_MASK)
+ 1;
freq = freq / div;
return (freq);
}
static inline uint64_t
ar71xx_ahb_freq(void)
{
uint32_t pll_config, div;
uint64_t freq;
/* PLL freq */
pll_config = ATH_READ_REG(AR71XX_PLL_CPU_CONFIG);
/* AHB freq */
div = (((pll_config >> PLL_AHB_DIV_SHIFT) & PLL_AHB_DIV_MASK) + 1) * 2;
freq = ar71xx_cpu_freq() / div;
return (freq);
}
static inline void
ar71xx_ddr_flush(uint32_t reg)
{

2
sys/mips/atheros/files.ar71xx
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@ -15,3 +15,5 @@ mips/atheros/uart_cpu_ar71xx.c optional uart
mips/atheros/ar71xx_bus_space_reversed.c standard
mips/mips/intr_machdep.c standard
mips/mips/tick.c standard
mips/atheros/ar71xx_setup.c standard
mips/atheros/ar71xx_chip.c standard

1
sys/mips/atheros/uart_bus_ar71xx.c
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@ -41,6 +41,7 @@ __FBSDID("$FreeBSD$");
#include <dev/uart/uart_bus.h>
#include <mips/atheros/ar71xxreg.h>
#include <mips/atheros/ar71xx_cpudef.h>
#include "uart_if.h"

1
sys/mips/atheros/uart_cpu_ar71xx.c
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@ -39,6 +39,7 @@ __FBSDID("$FreeBSD$");
#include <dev/uart/uart_cpu.h>
#include <mips/atheros/ar71xxreg.h>
#include <mips/atheros/ar71xx_cpudef.h>
#include <mips/atheros/ar71xx_bus_space_reversed.h>
bus_space_tag_t uart_bus_space_io;