1 /*-
2 * Copyright (c) 2012 Adrian Chadd <adrian@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD: releng/10.1/sys/mips/atheros/ar933x_chip.c 255764 2013-09-21 19:42:37Z adrian $");
29
30 #include "opt_ddb.h"
31
32 #include <sys/param.h>
33 #include <sys/conf.h>
34 #include <sys/kernel.h>
35 #include <sys/systm.h>
36 #include <sys/bus.h>
37 #include <sys/cons.h>
38 #include <sys/kdb.h>
39 #include <sys/reboot.h>
40
41 #include <vm/vm.h>
42 #include <vm/vm_page.h>
43
44 #include <net/ethernet.h>
45
46 #include <machine/clock.h>
47 #include <machine/cpu.h>
48 #include <machine/cpuregs.h>
49 #include <machine/hwfunc.h>
50 #include <machine/md_var.h>
51 #include <machine/trap.h>
52 #include <machine/vmparam.h>
53
54 #include <mips/atheros/ar71xxreg.h>
55 #include <mips/atheros/ar933xreg.h>
56
57 #include <mips/atheros/ar71xx_cpudef.h>
58 #include <mips/atheros/ar71xx_setup.h>
59
60 #include <mips/atheros/ar71xx_chip.h>
61 #include <mips/atheros/ar933x_chip.h>
62
63 static void
64 ar933x_chip_detect_mem_size(void)
65 {
66 }
67
68 static void
69 ar933x_chip_detect_sys_frequency(void)
70 {
71 uint32_t clock_ctrl;
72 uint32_t cpu_config;
73 uint32_t freq;
74 uint32_t t;
75
76 t = ATH_READ_REG(AR933X_RESET_REG_BOOTSTRAP);
77 if (t & AR933X_BOOTSTRAP_REF_CLK_40)
78 u_ar71xx_refclk = (40 * 1000 * 1000);
79 else
80 u_ar71xx_refclk = (25 * 1000 * 1000);
81
82 clock_ctrl = ATH_READ_REG(AR933X_PLL_CLOCK_CTRL_REG);
83 if (clock_ctrl & AR933X_PLL_CLOCK_CTRL_BYPASS) {
84 u_ar71xx_cpu_freq = u_ar71xx_refclk;
85 u_ar71xx_ahb_freq = u_ar71xx_refclk;
86 u_ar71xx_ddr_freq = u_ar71xx_refclk;
87 } else {
88 cpu_config = ATH_READ_REG(AR933X_PLL_CPU_CONFIG_REG);
89
90 t = (cpu_config >> AR933X_PLL_CPU_CONFIG_REFDIV_SHIFT) &
91 AR933X_PLL_CPU_CONFIG_REFDIV_MASK;
92 freq = u_ar71xx_refclk / t;
93
94 t = (cpu_config >> AR933X_PLL_CPU_CONFIG_NINT_SHIFT) &
95 AR933X_PLL_CPU_CONFIG_NINT_MASK;
96 freq *= t;
97
98 t = (cpu_config >> AR933X_PLL_CPU_CONFIG_OUTDIV_SHIFT) &
99 AR933X_PLL_CPU_CONFIG_OUTDIV_MASK;
100 if (t == 0)
101 t = 1;
102
103 freq >>= t;
104
105 t = ((clock_ctrl >> AR933X_PLL_CLOCK_CTRL_CPU_DIV_SHIFT) &
106 AR933X_PLL_CLOCK_CTRL_CPU_DIV_MASK) + 1;
107 u_ar71xx_cpu_freq = freq / t;
108
109 t = ((clock_ctrl >> AR933X_PLL_CLOCK_CTRL_DDR_DIV_SHIFT) &
110 AR933X_PLL_CLOCK_CTRL_DDR_DIV_MASK) + 1;
111 u_ar71xx_ddr_freq = freq / t;
112
113 t = ((clock_ctrl >> AR933X_PLL_CLOCK_CTRL_AHB_DIV_SHIFT) &
114 AR933X_PLL_CLOCK_CTRL_AHB_DIV_MASK) + 1;
115 u_ar71xx_ahb_freq = freq / t;
116 }
117
118 /* On the AR933x, the UART frequency is the reference clock,
119 * not the AHB bus clock.
120 */
121 u_ar71xx_uart_freq = u_ar71xx_refclk;
122
123 /*
124 * XXX check what the watchdog frequency should be?
125 */
126 u_ar71xx_wdt_freq = u_ar71xx_ahb_freq;
127 }
128
129 static void
130 ar933x_chip_device_stop(uint32_t mask)
131 {
132 uint32_t reg;
133
134 reg = ATH_READ_REG(AR933X_RESET_REG_RESET_MODULE);
135 ATH_WRITE_REG(AR933X_RESET_REG_RESET_MODULE, reg | mask);
136 }
137
138 static void
139 ar933x_chip_device_start(uint32_t mask)
140 {
141 uint32_t reg;
142
143 reg = ATH_READ_REG(AR933X_RESET_REG_RESET_MODULE);
144 ATH_WRITE_REG(AR933X_RESET_REG_RESET_MODULE, reg & ~mask);
145 }
146
147 static int
148 ar933x_chip_device_stopped(uint32_t mask)
149 {
150 uint32_t reg;
151
152 reg = ATH_READ_REG(AR933X_RESET_REG_RESET_MODULE);
153 return ((reg & mask) == mask);
154 }
155
156 static void
157 ar933x_chip_set_mii_speed(uint32_t unit, uint32_t speed)
158 {
159
160 /* XXX TODO */
161 return;
162 }
163
164 /*
165 * XXX TODO !!
166 */
167 static void
168 ar933x_chip_set_pll_ge(int unit, int speed, uint32_t pll)
169 {
170
171 switch (unit) {
172 case 0:
173 /* XXX TODO */
174 break;
175 case 1:
176 /* XXX TODO */
177 break;
178 default:
179 printf("%s: invalid PLL set for arge unit: %d\n",
180 __func__, unit);
181 return;
182 }
183 }
184
185 static void
186 ar933x_chip_ddr_flush_ge(int unit)
187 {
188
189 switch (unit) {
190 case 0:
191 ar71xx_ddr_flush(AR933X_DDR_REG_FLUSH_GE0);
192 break;
193 case 1:
194 ar71xx_ddr_flush(AR933X_DDR_REG_FLUSH_GE1);
195 break;
196 default:
197 printf("%s: invalid DDR flush for arge unit: %d\n",
198 __func__, unit);
199 return;
200 }
201 }
202
203 static void
204 ar933x_chip_ddr_flush_ip2(void)
205 {
206
207 ar71xx_ddr_flush(AR933X_DDR_REG_FLUSH_WMAC);
208 }
209
210 static uint32_t
211 ar933x_chip_get_eth_pll(unsigned int mac, int speed)
212 {
213 uint32_t pll;
214
215 switch (speed) {
216 case 10:
217 pll = AR933X_PLL_VAL_10;
218 break;
219 case 100:
220 pll = AR933X_PLL_VAL_100;
221 break;
222 case 1000:
223 pll = AR933X_PLL_VAL_1000;
224 break;
225 default:
226 printf("%s%d: invalid speed %d\n", __func__, mac, speed);
227 pll = 0;
228 }
229 return (pll);
230 }
231
232 static void
233 ar933x_chip_init_usb_peripheral(void)
234 {
235 ar71xx_device_stop(AR933X_RESET_USBSUS_OVERRIDE);
236 DELAY(100);
237
238 ar71xx_device_start(AR933X_RESET_USB_HOST);
239 DELAY(100);
240
241 ar71xx_device_start(AR933X_RESET_USB_PHY);
242 DELAY(100);
243 }
244
245 struct ar71xx_cpu_def ar933x_chip_def = {
246 &ar933x_chip_detect_mem_size,
247 &ar933x_chip_detect_sys_frequency,
248 &ar933x_chip_device_stop,
249 &ar933x_chip_device_start,
250 &ar933x_chip_device_stopped,
251 &ar933x_chip_set_pll_ge,
252 &ar933x_chip_set_mii_speed,
253 &ar71xx_chip_set_mii_if,
254 &ar933x_chip_ddr_flush_ge,
255 &ar933x_chip_get_eth_pll,
256 &ar933x_chip_ddr_flush_ip2,
257 &ar933x_chip_init_usb_peripheral
258 };
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