2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2012 Adrian Chadd <adrian@FreeBSD.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
34 #include <sys/param.h>
36 #include <sys/kernel.h>
37 #include <sys/systm.h>
41 #include <sys/reboot.h>
44 #include <vm/vm_page.h>
46 #include <net/ethernet.h>
48 #include <machine/clock.h>
49 #include <machine/cpu.h>
50 #include <machine/cpuregs.h>
51 #include <machine/hwfunc.h>
52 #include <machine/md_var.h>
53 #include <machine/trap.h>
54 #include <machine/vmparam.h>
56 #include <mips/atheros/ar71xxreg.h>
57 #include <mips/atheros/ar933xreg.h>
59 #include <mips/atheros/ar71xx_cpudef.h>
60 #include <mips/atheros/ar71xx_setup.h>
62 #include <mips/atheros/ar71xx_chip.h>
63 #include <mips/atheros/ar933x_chip.h>
66 ar933x_chip_detect_mem_size(void)
71 ar933x_chip_detect_sys_frequency(void)
78 t = ATH_READ_REG(AR933X_RESET_REG_BOOTSTRAP);
79 if (t & AR933X_BOOTSTRAP_REF_CLK_40)
80 u_ar71xx_refclk = (40 * 1000 * 1000);
82 u_ar71xx_refclk = (25 * 1000 * 1000);
84 clock_ctrl = ATH_READ_REG(AR933X_PLL_CLOCK_CTRL_REG);
85 if (clock_ctrl & AR933X_PLL_CLOCK_CTRL_BYPASS) {
86 u_ar71xx_cpu_freq = u_ar71xx_refclk;
87 u_ar71xx_ahb_freq = u_ar71xx_refclk;
88 u_ar71xx_ddr_freq = u_ar71xx_refclk;
90 cpu_config = ATH_READ_REG(AR933X_PLL_CPU_CONFIG_REG);
92 t = (cpu_config >> AR933X_PLL_CPU_CONFIG_REFDIV_SHIFT) &
93 AR933X_PLL_CPU_CONFIG_REFDIV_MASK;
94 freq = u_ar71xx_refclk / t;
96 t = (cpu_config >> AR933X_PLL_CPU_CONFIG_NINT_SHIFT) &
97 AR933X_PLL_CPU_CONFIG_NINT_MASK;
100 t = (cpu_config >> AR933X_PLL_CPU_CONFIG_OUTDIV_SHIFT) &
101 AR933X_PLL_CPU_CONFIG_OUTDIV_MASK;
107 t = ((clock_ctrl >> AR933X_PLL_CLOCK_CTRL_CPU_DIV_SHIFT) &
108 AR933X_PLL_CLOCK_CTRL_CPU_DIV_MASK) + 1;
109 u_ar71xx_cpu_freq = freq / t;
111 t = ((clock_ctrl >> AR933X_PLL_CLOCK_CTRL_DDR_DIV_SHIFT) &
112 AR933X_PLL_CLOCK_CTRL_DDR_DIV_MASK) + 1;
113 u_ar71xx_ddr_freq = freq / t;
115 t = ((clock_ctrl >> AR933X_PLL_CLOCK_CTRL_AHB_DIV_SHIFT) &
116 AR933X_PLL_CLOCK_CTRL_AHB_DIV_MASK) + 1;
117 u_ar71xx_ahb_freq = freq / t;
121 * On the AR933x, the UART frequency is the reference clock,
122 * not the AHB bus clock.
124 u_ar71xx_uart_freq = u_ar71xx_refclk;
127 * XXX TODO: check whether the mdio frequency is always the
128 * refclock frequency, or whether it's variable like on the
131 u_ar71xx_mdio_freq = u_ar71xx_refclk;
134 * XXX check what the watchdog frequency should be?
136 u_ar71xx_wdt_freq = u_ar71xx_ahb_freq;
140 ar933x_chip_device_stop(uint32_t mask)
144 reg = ATH_READ_REG(AR933X_RESET_REG_RESET_MODULE);
145 ATH_WRITE_REG(AR933X_RESET_REG_RESET_MODULE, reg | mask);
149 ar933x_chip_device_start(uint32_t mask)
153 reg = ATH_READ_REG(AR933X_RESET_REG_RESET_MODULE);
154 ATH_WRITE_REG(AR933X_RESET_REG_RESET_MODULE, reg & ~mask);
158 ar933x_chip_device_stopped(uint32_t mask)
162 reg = ATH_READ_REG(AR933X_RESET_REG_RESET_MODULE);
163 return ((reg & mask) == mask);
167 ar933x_chip_set_mii_speed(uint32_t unit, uint32_t speed)
178 ar933x_chip_set_pll_ge(int unit, int speed, uint32_t pll)
189 printf("%s: invalid PLL set for arge unit: %d\n",
196 ar933x_chip_ddr_flush(ar71xx_flush_ddr_id_t id)
200 case AR71XX_CPU_DDR_FLUSH_GE0:
201 ar71xx_ddr_flush(AR933X_DDR_REG_FLUSH_GE0);
203 case AR71XX_CPU_DDR_FLUSH_GE1:
204 ar71xx_ddr_flush(AR933X_DDR_REG_FLUSH_GE1);
206 case AR71XX_CPU_DDR_FLUSH_USB:
207 ar71xx_ddr_flush(AR933X_DDR_REG_FLUSH_USB);
209 case AR71XX_CPU_DDR_FLUSH_WMAC:
210 ar71xx_ddr_flush(AR933X_DDR_REG_FLUSH_WMAC);
213 printf("%s: invalid DDR flush id (%d)\n", __func__, id);
219 ar933x_chip_get_eth_pll(unsigned int mac, int speed)
225 pll = AR933X_PLL_VAL_10;
228 pll = AR933X_PLL_VAL_100;
231 pll = AR933X_PLL_VAL_1000;
234 printf("%s%d: invalid speed %d\n", __func__, mac, speed);
241 ar933x_chip_init_usb_peripheral(void)
243 ar71xx_device_stop(AR933X_RESET_USBSUS_OVERRIDE);
246 ar71xx_device_start(AR933X_RESET_USB_HOST);
249 ar71xx_device_start(AR933X_RESET_USB_PHY);
254 ar933x_configure_gmac(uint32_t gmac_cfg)
258 reg = ATH_READ_REG(AR933X_GMAC_REG_ETH_CFG);
261 * The relevant bits here include:
263 * + AR933X_ETH_CFG_SW_PHY_SWAP
264 * + AR933X_ETH_CFG_SW_PHY_ADDR_SWAP
266 * There are other things; look at what openwrt exposes so
267 * it can be correctly exposed.
269 * TODO: what about ethernet switch support? How's that work?
272 printf("%s: GMAC config was 0x%08x\n", __func__, reg);
273 reg &= ~(AR933X_ETH_CFG_SW_PHY_SWAP | AR933X_ETH_CFG_SW_PHY_ADDR_SWAP);
276 printf("%s: GMAC setting is 0x%08x; register is now 0x%08x\n",
280 ATH_WRITE_REG(AR933X_GMAC_REG_ETH_CFG, reg);
284 ar933x_chip_init_gmac(void)
287 uint32_t gmac_cfg = 0;
290 * These two bits need a bit better explanation.
292 * The default configuration in the hardware is to map both
293 * ports to the internal switch.
295 * Here, GE0 == arge0, GE1 == arge1.
297 * The internal switch has:
298 * + 5 MAC ports, MAC0->MAC4.
299 * + 5 PHY ports, PHY0->PHY4,
300 * + MAC0 connects to GE1;
301 * + GE0 connects to PHY4;
302 * + The other mappings are MAC1->PHY0, MAC2->PHY1 .. MAC4->PHY3.
304 * The GE1 port is linked in via 1000MBit/full, supplying what is
305 * normally the 'WAN' switch ports.
307 * The switch is connected the MDIO bus on GE1. It looks like
308 * a normal AR7240 on-board switch.
310 * The GE0 port is connected via MII to PHY4, and can operate in
311 * 10/100mbit, full/half duplex. Ie, you can speak to PHY4 on
312 * the MDIO bus and everything will simply 'work'.
314 * So far so good. This looks just like an AR7240 SoC.
316 * However, some configurations will just expose one or two
317 * physical ports. In this case, some configuration bits can
318 * be set to tweak this.
320 * + CFG_SW_PHY_ADDR_SWAP swaps PHY port 0 with PHY port 4.
321 * Ie, GE0's PHY shows up as PHY 0. So if there's only
322 * one physical port, there's no need to involve the
323 * switch framework - it can just show up as a default,
326 * + CFG_SW_PHY_SWAP swaps the internal switch connection
327 * between PHY0 and PHY4. Ie, PHY4 connects to MAc1,
328 * PHY0 connects to GE0.
330 if ((resource_int_value("ar933x_gmac", 0, "override_phy", &val) == 0)
333 if ((resource_int_value("ar933x_gmac", 0, "swap_phy", &val) == 0)
335 gmac_cfg |= AR933X_ETH_CFG_SW_PHY_SWAP;
336 if ((resource_int_value("ar933x_gmac", 0, "swap_phy_addr", &val) == 0)
338 gmac_cfg |= AR933X_ETH_CFG_SW_PHY_ADDR_SWAP;
339 ar933x_configure_gmac(gmac_cfg);
342 struct ar71xx_cpu_def ar933x_chip_def = {
343 &ar933x_chip_detect_mem_size,
344 &ar933x_chip_detect_sys_frequency,
345 &ar933x_chip_device_stop,
346 &ar933x_chip_device_start,
347 &ar933x_chip_device_stopped,
348 &ar933x_chip_set_pll_ge,
349 &ar933x_chip_set_mii_speed,
350 &ar71xx_chip_set_mii_if,
351 &ar933x_chip_get_eth_pll,
352 &ar933x_chip_ddr_flush,
353 &ar933x_chip_init_usb_peripheral,
356 &ar933x_chip_init_gmac,