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freebsd-skq/sys/mips/atheros/ar933x_chip.c

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Commit initial (unfinished!) support for the AR933x series of embedded CPUs. The AR933x is a mips24k based SoC with an AR9380 series SoC on board, two gigabit ethernet interfaces and an internal 10/100mbit ethernet switch. There's also the normal interfaces (USB, ethernet, uart, GPIO.) The downside? There's a non-ns8250 UART device. With a very basic UART driver (not in this commit) the SoC is initialised and boots up. I'll commit the UART code soon and then link it into the general setup path. This code is a re-implementation based from the Linux kernel / openwrt AR933x support. TODO: * UART (obviously) * All of the ethernet, USB and wifi SoC glue, including ethernet PLL programming.
2013-03-27 03:38:58 +00:00
/*-
* 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;
}
Initialise the watchdog and UART frequencies. For all pre-AR933x chips, the frequency is just the APB frequency. For the AR933x, the UART frequency is different but we just hacked around it. For the AR934x, there's a different PLL setting for these, so they have to be broken out.
2013-07-21 03:52:52 +00:00
Update the AR933x SoC support to include a few new knobs: * Initialise the MDIO clock to default to the reference clock; * Add some code to allow the hints mechanism to allow setup of the GMAC config block. * Document how the switch is wired up internally. Tested: * AR9331 SoC (Carambola 2)
2013-10-15 03:23:08 +00:00
/*
* On the AR933x, the UART frequency is the reference clock,
Fix the AR933x CPU UART support by using the correct clock when calculating the UART frequency. Tested: * AR933x (carambola 2 board), UART now works again Approved by: re
2013-09-21 19:42:37 +00:00
* not the AHB bus clock.
*/
u_ar71xx_uart_freq = u_ar71xx_refclk;
Update the AR933x SoC support to include a few new knobs: * Initialise the MDIO clock to default to the reference clock; * Add some code to allow the hints mechanism to allow setup of the GMAC config block. * Document how the switch is wired up internally. Tested: * AR9331 SoC (Carambola 2)
2013-10-15 03:23:08 +00:00
/*
* XXX TODO: check whether the mdio frequency is always the
* refclock frequency, or whether it's variable like on the
* AR934x.
*/
u_ar71xx_mdio_freq = u_ar71xx_refclk;
Fix the AR933x CPU UART support by using the correct clock when calculating the UART frequency. Tested: * AR933x (carambola 2 board), UART now works again Approved by: re
2013-09-21 19:42:37 +00:00
/*
* XXX check what the watchdog frequency should be?
*/
Initialise the watchdog and UART frequencies. For all pre-AR933x chips, the frequency is just the APB frequency. For the AR933x, the UART frequency is different but we just hacked around it. For the AR934x, there's a different PLL setting for these, so they have to be broken out.
2013-07-21 03:52:52 +00:00
u_ar71xx_wdt_freq = u_ar71xx_ahb_freq;
Commit initial (unfinished!) support for the AR933x series of embedded CPUs. The AR933x is a mips24k based SoC with an AR9380 series SoC on board, two gigabit ethernet interfaces and an internal 10/100mbit ethernet switch. There's also the normal interfaces (USB, ethernet, uart, GPIO.) The downside? There's a non-ns8250 UART device. With a very basic UART driver (not in this commit) the SoC is initialised and boots up. I'll commit the UART code soon and then link it into the general setup path. This code is a re-implementation based from the Linux kernel / openwrt AR933x support. TODO: * UART (obviously) * All of the ethernet, USB and wifi SoC glue, including ethernet PLL programming.
2013-03-27 03:38:58 +00:00
}
static void
ar933x_chip_device_stop(uint32_t mask)
{
Fix the AR933x platform device start/stop code. This was ported from the AR724x code and I think that also doesn't quite work. I'll investigate that soon. With this in place the system reset path works, so 'reset' from kdb actually resets the SoC. Tested: * AP121 test board
2013-03-28 05:43:03 +00:00
uint32_t reg;
Commit initial (unfinished!) support for the AR933x series of embedded CPUs. The AR933x is a mips24k based SoC with an AR9380 series SoC on board, two gigabit ethernet interfaces and an internal 10/100mbit ethernet switch. There's also the normal interfaces (USB, ethernet, uart, GPIO.) The downside? There's a non-ns8250 UART device. With a very basic UART driver (not in this commit) the SoC is initialised and boots up. I'll commit the UART code soon and then link it into the general setup path. This code is a re-implementation based from the Linux kernel / openwrt AR933x support. TODO: * UART (obviously) * All of the ethernet, USB and wifi SoC glue, including ethernet PLL programming.
2013-03-27 03:38:58 +00:00
reg = ATH_READ_REG(AR933X_RESET_REG_RESET_MODULE);
Fix the AR933x platform device start/stop code. This was ported from the AR724x code and I think that also doesn't quite work. I'll investigate that soon. With this in place the system reset path works, so 'reset' from kdb actually resets the SoC. Tested: * AP121 test board
2013-03-28 05:43:03 +00:00
ATH_WRITE_REG(AR933X_RESET_REG_RESET_MODULE, reg | mask);
Commit initial (unfinished!) support for the AR933x series of embedded CPUs. The AR933x is a mips24k based SoC with an AR9380 series SoC on board, two gigabit ethernet interfaces and an internal 10/100mbit ethernet switch. There's also the normal interfaces (USB, ethernet, uart, GPIO.) The downside? There's a non-ns8250 UART device. With a very basic UART driver (not in this commit) the SoC is initialised and boots up. I'll commit the UART code soon and then link it into the general setup path. This code is a re-implementation based from the Linux kernel / openwrt AR933x support. TODO: * UART (obviously) * All of the ethernet, USB and wifi SoC glue, including ethernet PLL programming.
2013-03-27 03:38:58 +00:00
}
static void
ar933x_chip_device_start(uint32_t mask)
{
Fix the AR933x platform device start/stop code. This was ported from the AR724x code and I think that also doesn't quite work. I'll investigate that soon. With this in place the system reset path works, so 'reset' from kdb actually resets the SoC. Tested: * AP121 test board
2013-03-28 05:43:03 +00:00
uint32_t reg;
Commit initial (unfinished!) support for the AR933x series of embedded CPUs. The AR933x is a mips24k based SoC with an AR9380 series SoC on board, two gigabit ethernet interfaces and an internal 10/100mbit ethernet switch. There's also the normal interfaces (USB, ethernet, uart, GPIO.) The downside? There's a non-ns8250 UART device. With a very basic UART driver (not in this commit) the SoC is initialised and boots up. I'll commit the UART code soon and then link it into the general setup path. This code is a re-implementation based from the Linux kernel / openwrt AR933x support. TODO: * UART (obviously) * All of the ethernet, USB and wifi SoC glue, including ethernet PLL programming.
2013-03-27 03:38:58 +00:00
reg = ATH_READ_REG(AR933X_RESET_REG_RESET_MODULE);
Fix the AR933x platform device start/stop code. This was ported from the AR724x code and I think that also doesn't quite work. I'll investigate that soon. With this in place the system reset path works, so 'reset' from kdb actually resets the SoC. Tested: * AP121 test board
2013-03-28 05:43:03 +00:00
ATH_WRITE_REG(AR933X_RESET_REG_RESET_MODULE, reg & ~mask);
Commit initial (unfinished!) support for the AR933x series of embedded CPUs. The AR933x is a mips24k based SoC with an AR9380 series SoC on board, two gigabit ethernet interfaces and an internal 10/100mbit ethernet switch. There's also the normal interfaces (USB, ethernet, uart, GPIO.) The downside? There's a non-ns8250 UART device. With a very basic UART driver (not in this commit) the SoC is initialised and boots up. I'll commit the UART code soon and then link it into the general setup path. This code is a re-implementation based from the Linux kernel / openwrt AR933x support. TODO: * UART (obviously) * All of the ethernet, USB and wifi SoC glue, including ethernet PLL programming.
2013-03-27 03:38:58 +00:00
}
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)
{
Implement the AR933x ethernet support. Obtained from: OpenWRT
2013-04-05 01:35:59 +00:00
uint32_t pll;
Commit initial (unfinished!) support for the AR933x series of embedded CPUs. The AR933x is a mips24k based SoC with an AR9380 series SoC on board, two gigabit ethernet interfaces and an internal 10/100mbit ethernet switch. There's also the normal interfaces (USB, ethernet, uart, GPIO.) The downside? There's a non-ns8250 UART device. With a very basic UART driver (not in this commit) the SoC is initialised and boots up. I'll commit the UART code soon and then link it into the general setup path. This code is a re-implementation based from the Linux kernel / openwrt AR933x support. TODO: * UART (obviously) * All of the ethernet, USB and wifi SoC glue, including ethernet PLL programming.
2013-03-27 03:38:58 +00:00
Implement the AR933x ethernet support. Obtained from: OpenWRT
2013-04-05 01:35:59 +00:00
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);
Commit initial (unfinished!) support for the AR933x series of embedded CPUs. The AR933x is a mips24k based SoC with an AR9380 series SoC on board, two gigabit ethernet interfaces and an internal 10/100mbit ethernet switch. There's also the normal interfaces (USB, ethernet, uart, GPIO.) The downside? There's a non-ns8250 UART device. With a very basic UART driver (not in this commit) the SoC is initialised and boots up. I'll commit the UART code soon and then link it into the general setup path. This code is a re-implementation based from the Linux kernel / openwrt AR933x support. TODO: * UART (obviously) * All of the ethernet, USB and wifi SoC glue, including ethernet PLL programming.
2013-03-27 03:38:58 +00:00
}
static void
ar933x_chip_init_usb_peripheral(void)
{
Implement USB device reset and poweron. Tested: * Atheros AP131, AR9331 SoC
2013-04-05 02:02:37 +00:00
ar71xx_device_stop(AR933X_RESET_USBSUS_OVERRIDE);
DELAY(100);
Commit initial (unfinished!) support for the AR933x series of embedded CPUs. The AR933x is a mips24k based SoC with an AR9380 series SoC on board, two gigabit ethernet interfaces and an internal 10/100mbit ethernet switch. There's also the normal interfaces (USB, ethernet, uart, GPIO.) The downside? There's a non-ns8250 UART device. With a very basic UART driver (not in this commit) the SoC is initialised and boots up. I'll commit the UART code soon and then link it into the general setup path. This code is a re-implementation based from the Linux kernel / openwrt AR933x support. TODO: * UART (obviously) * All of the ethernet, USB and wifi SoC glue, including ethernet PLL programming.
2013-03-27 03:38:58 +00:00
Implement USB device reset and poweron. Tested: * Atheros AP131, AR9331 SoC
2013-04-05 02:02:37 +00:00
ar71xx_device_start(AR933X_RESET_USB_HOST);
DELAY(100);
Commit initial (unfinished!) support for the AR933x series of embedded CPUs. The AR933x is a mips24k based SoC with an AR9380 series SoC on board, two gigabit ethernet interfaces and an internal 10/100mbit ethernet switch. There's also the normal interfaces (USB, ethernet, uart, GPIO.) The downside? There's a non-ns8250 UART device. With a very basic UART driver (not in this commit) the SoC is initialised and boots up. I'll commit the UART code soon and then link it into the general setup path. This code is a re-implementation based from the Linux kernel / openwrt AR933x support. TODO: * UART (obviously) * All of the ethernet, USB and wifi SoC glue, including ethernet PLL programming.
2013-03-27 03:38:58 +00:00
Implement USB device reset and poweron. Tested: * Atheros AP131, AR9331 SoC
2013-04-05 02:02:37 +00:00
ar71xx_device_start(AR933X_RESET_USB_PHY);
DELAY(100);
Commit initial (unfinished!) support for the AR933x series of embedded CPUs. The AR933x is a mips24k based SoC with an AR9380 series SoC on board, two gigabit ethernet interfaces and an internal 10/100mbit ethernet switch. There's also the normal interfaces (USB, ethernet, uart, GPIO.) The downside? There's a non-ns8250 UART device. With a very basic UART driver (not in this commit) the SoC is initialised and boots up. I'll commit the UART code soon and then link it into the general setup path. This code is a re-implementation based from the Linux kernel / openwrt AR933x support. TODO: * UART (obviously) * All of the ethernet, USB and wifi SoC glue, including ethernet PLL programming.
2013-03-27 03:38:58 +00:00
}
Update the AR933x SoC support to include a few new knobs: * Initialise the MDIO clock to default to the reference clock; * Add some code to allow the hints mechanism to allow setup of the GMAC config block. * Document how the switch is wired up internally. Tested: * AR9331 SoC (Carambola 2)
2013-10-15 03:23:08 +00:00
static void
ar933x_configure_gmac(uint32_t gmac_cfg)
{
uint32_t reg;
reg = ATH_READ_REG(AR933X_GMAC_REG_ETH_CFG);
/*
* The relevant bits here include:
*
* + AR933X_ETH_CFG_SW_PHY_SWAP
* + AR933X_ETH_CFG_SW_PHY_ADDR_SWAP
*
* There are other things; look at what openwrt exposes so
* it can be correctly exposed.
*
* TODO: what about ethernet switch support? How's that work?
*/
if (bootverbose)
printf("%s: GMAC config was 0x%08x\n", __func__, reg);
reg &= ~(AR933X_ETH_CFG_SW_PHY_SWAP | AR933X_ETH_CFG_SW_PHY_ADDR_SWAP);
reg |= gmac_cfg;
if (bootverbose)
printf("%s: GMAC setting is 0x%08x; register is now 0x%08x\n",
__func__,
gmac_cfg,
reg);
ATH_WRITE_REG(AR933X_GMAC_REG_ETH_CFG, reg);
}
static void
ar933x_chip_init_gmac(void)
{
int val;
uint32_t gmac_cfg = 0;
/*
* These two bits need a bit better explanation.
*
* The default configuration in the hardware is to map both
* ports to the internal switch.
*
* Here, GE0 == arge0, GE1 == arge1.
*
* The internal switch has:
* + 5 MAC ports, MAC0->MAC4.
* + 5 PHY ports, PHY0->PHY4,
* + MAC0 connects to GE1;
* + GE0 connects to PHY4;
* + The other mappings are MAC1->PHY0, MAC2->PHY1 .. MAC4->PHY3.
*
* The GE1 port is linked in via 1000MBit/full, supplying what is
* normally the 'WAN' switch ports.
*
* The switch is connected the MDIO bus on GE1. It looks like
* a normal AR7240 on-board switch.
*
* The GE0 port is connected via MII to PHY4, and can operate in
* 10/100mbit, full/half duplex. Ie, you can speak to PHY4 on
* the MDIO bus and everything will simply 'work'.
*
* So far so good. This looks just like an AR7240 SoC.
*
* However, some configurations will just expose one or two
* physical ports. In this case, some configuration bits can
* be set to tweak this.
*
* + CFG_SW_PHY_ADDR_SWAP swaps PHY port 0 with PHY port 4.
* Ie, GE0's PHY shows up as PHY 0. So if there's only
* one physical port, there's no need to involve the
* switch framework - it can just show up as a default,
* normal single PHY.
*
* + CFG_SW_PHY_SWAP swaps the internal switch connection
* between PHY0 and PHY4. Ie, PHY4 connects to MAc1,
* PHY0 connects to GE0.
*/
if ((resource_int_value("ar933x_gmac", 0, "override_phy", &val) == 0)
&& (val == 0))
return;
if ((resource_int_value("ar933x_gmac", 0, "swap_phy", &val) == 0)
&& (val == 1))
gmac_cfg |= AR933X_ETH_CFG_SW_PHY_SWAP;
if ((resource_int_value("ar933x_gmac", 0, "swap_phy_addr", &val) == 0)
&& (val == 1))
gmac_cfg |= AR933X_ETH_CFG_SW_PHY_ADDR_SWAP;
ar933x_configure_gmac(gmac_cfg);
}
Commit initial (unfinished!) support for the AR933x series of embedded CPUs. The AR933x is a mips24k based SoC with an AR9380 series SoC on board, two gigabit ethernet interfaces and an internal 10/100mbit ethernet switch. There's also the normal interfaces (USB, ethernet, uart, GPIO.) The downside? There's a non-ns8250 UART device. With a very basic UART driver (not in this commit) the SoC is initialised and boots up. I'll commit the UART code soon and then link it into the general setup path. This code is a re-implementation based from the Linux kernel / openwrt AR933x support. TODO: * UART (obviously) * All of the ethernet, USB and wifi SoC glue, including ethernet PLL programming.
2013-03-27 03:38:58 +00:00
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,
Update the AR933x SoC support to include a few new knobs: * Initialise the MDIO clock to default to the reference clock; * Add some code to allow the hints mechanism to allow setup of the GMAC config block. * Document how the switch is wired up internally. Tested: * AR9331 SoC (Carambola 2)
2013-10-15 03:23:08 +00:00
&ar933x_chip_init_usb_peripheral,
NULL,
NULL,
&ar933x_chip_init_gmac,
Commit initial (unfinished!) support for the AR933x series of embedded CPUs. The AR933x is a mips24k based SoC with an AR9380 series SoC on board, two gigabit ethernet interfaces and an internal 10/100mbit ethernet switch. There's also the normal interfaces (USB, ethernet, uart, GPIO.) The downside? There's a non-ns8250 UART device. With a very basic UART driver (not in this commit) the SoC is initialised and boots up. I'll commit the UART code soon and then link it into the general setup path. This code is a re-implementation based from the Linux kernel / openwrt AR933x support. TODO: * UART (obviously) * All of the ethernet, USB and wifi SoC glue, including ethernet PLL programming.
2013-03-27 03:38:58 +00:00
};
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