freebsd-skq/sys/mips/atheros/ar933x_chip.c
adrian 13e31c8950 Implement USB device reset and poweron.
Tested:

* Atheros AP131, AR9331 SoC
2013-04-05 02:02:37 +00:00

249 lines
5.7 KiB
C

/*-
* Copyright (c) 2012 Adrian Chadd <adrian@FreeBSD.org>
* 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 "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/cpuregs.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/ar933xreg.h>
#include <mips/atheros/ar71xx_cpudef.h>
#include <mips/atheros/ar71xx_setup.h>
#include <mips/atheros/ar71xx_chip.h>
#include <mips/atheros/ar933x_chip.h>
static void
ar933x_chip_detect_mem_size(void)
{
}
static void
ar933x_chip_detect_sys_frequency(void)
{
uint32_t clock_ctrl;
uint32_t cpu_config;
uint32_t freq;
uint32_t t;
t = ATH_READ_REG(AR933X_RESET_REG_BOOTSTRAP);
if (t & AR933X_BOOTSTRAP_REF_CLK_40)
u_ar71xx_refclk = (40 * 1000 * 1000);
else
u_ar71xx_refclk = (25 * 1000 * 1000);
clock_ctrl = ATH_READ_REG(AR933X_PLL_CLOCK_CTRL_REG);
if (clock_ctrl & AR933X_PLL_CLOCK_CTRL_BYPASS) {
u_ar71xx_cpu_freq = u_ar71xx_refclk;
u_ar71xx_ahb_freq = u_ar71xx_refclk;
u_ar71xx_ddr_freq = u_ar71xx_refclk;
} else {
cpu_config = ATH_READ_REG(AR933X_PLL_CPU_CONFIG_REG);
t = (cpu_config >> AR933X_PLL_CPU_CONFIG_REFDIV_SHIFT) &
AR933X_PLL_CPU_CONFIG_REFDIV_MASK;
freq = u_ar71xx_refclk / t;
t = (cpu_config >> AR933X_PLL_CPU_CONFIG_NINT_SHIFT) &
AR933X_PLL_CPU_CONFIG_NINT_MASK;
freq *= t;
t = (cpu_config >> AR933X_PLL_CPU_CONFIG_OUTDIV_SHIFT) &
AR933X_PLL_CPU_CONFIG_OUTDIV_MASK;
if (t == 0)
t = 1;
freq >>= t;
t = ((clock_ctrl >> AR933X_PLL_CLOCK_CTRL_CPU_DIV_SHIFT) &
AR933X_PLL_CLOCK_CTRL_CPU_DIV_MASK) + 1;
u_ar71xx_cpu_freq = freq / t;
t = ((clock_ctrl >> AR933X_PLL_CLOCK_CTRL_DDR_DIV_SHIFT) &
AR933X_PLL_CLOCK_CTRL_DDR_DIV_MASK) + 1;
u_ar71xx_ddr_freq = freq / t;
t = ((clock_ctrl >> AR933X_PLL_CLOCK_CTRL_AHB_DIV_SHIFT) &
AR933X_PLL_CLOCK_CTRL_AHB_DIV_MASK) + 1;
u_ar71xx_ahb_freq = freq / t;
}
}
static void
ar933x_chip_device_stop(uint32_t mask)
{
uint32_t reg;
reg = ATH_READ_REG(AR933X_RESET_REG_RESET_MODULE);
ATH_WRITE_REG(AR933X_RESET_REG_RESET_MODULE, reg | mask);
}
static void
ar933x_chip_device_start(uint32_t mask)
{
uint32_t reg;
reg = ATH_READ_REG(AR933X_RESET_REG_RESET_MODULE);
ATH_WRITE_REG(AR933X_RESET_REG_RESET_MODULE, reg & ~mask);
}
static int
ar933x_chip_device_stopped(uint32_t mask)
{
uint32_t reg;
reg = ATH_READ_REG(AR933X_RESET_REG_RESET_MODULE);
return ((reg & mask) == mask);
}
static void
ar933x_chip_set_mii_speed(uint32_t unit, uint32_t speed)
{
/* XXX TODO */
return;
}
/*
* XXX TODO !!
*/
static void
ar933x_chip_set_pll_ge(int unit, int speed, uint32_t pll)
{
switch (unit) {
case 0:
/* XXX TODO */
break;
case 1:
/* XXX TODO */
break;
default:
printf("%s: invalid PLL set for arge unit: %d\n",
__func__, unit);
return;
}
}
static void
ar933x_chip_ddr_flush_ge(int unit)
{
switch (unit) {
case 0:
ar71xx_ddr_flush(AR933X_DDR_REG_FLUSH_GE0);
break;
case 1:
ar71xx_ddr_flush(AR933X_DDR_REG_FLUSH_GE1);
break;
default:
printf("%s: invalid DDR flush for arge unit: %d\n",
__func__, unit);
return;
}
}
static void
ar933x_chip_ddr_flush_ip2(void)
{
ar71xx_ddr_flush(AR933X_DDR_REG_FLUSH_WMAC);
}
static uint32_t
ar933x_chip_get_eth_pll(unsigned int mac, int speed)
{
uint32_t pll;
switch (speed) {
case 10:
pll = AR933X_PLL_VAL_10;
break;
case 100:
pll = AR933X_PLL_VAL_100;
break;
case 1000:
pll = AR933X_PLL_VAL_1000;
break;
default:
printf("%s%d: invalid speed %d\n", __func__, mac, speed);
pll = 0;
}
return (pll);
}
static void
ar933x_chip_init_usb_peripheral(void)
{
ar71xx_device_stop(AR933X_RESET_USBSUS_OVERRIDE);
DELAY(100);
ar71xx_device_start(AR933X_RESET_USB_HOST);
DELAY(100);
ar71xx_device_start(AR933X_RESET_USB_PHY);
DELAY(100);
}
struct ar71xx_cpu_def ar933x_chip_def = {
&ar933x_chip_detect_mem_size,
&ar933x_chip_detect_sys_frequency,
&ar933x_chip_device_stop,
&ar933x_chip_device_start,
&ar933x_chip_device_stopped,
&ar933x_chip_set_pll_ge,
&ar933x_chip_set_mii_speed,
&ar71xx_chip_set_mii_if,
&ar933x_chip_ddr_flush_ge,
&ar933x_chip_get_eth_pll,
&ar933x_chip_ddr_flush_ip2,
&ar933x_chip_init_usb_peripheral
};