ar71xx_chip.c revision 221240 
1/*-
2 * Copyright (c) 2010 Adrian Chadd
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: head/sys/mips/atheros/ar71xx_chip.c 221240 2011-04-30 02:31:56Z adrian $");
29
30#include <sys/param.h>
31#include <machine/cpuregs.h>
32
33#include <mips/sentry5/s5reg.h>
34
35#include "opt_ddb.h"
36
37#include <sys/param.h>
38#include <sys/conf.h>
39#include <sys/kernel.h>
40#include <sys/systm.h>
41#include <sys/bus.h>
42#include <sys/cons.h>
43#include <sys/kdb.h>
44#include <sys/reboot.h>
45
46#include <vm/vm.h>
47#include <vm/vm_page.h>
48
49#include <net/ethernet.h>
50
51#include <machine/clock.h>
52#include <machine/cpu.h>
53#include <machine/hwfunc.h>
54#include <machine/md_var.h>
55#include <machine/trap.h>
56#include <machine/vmparam.h>
57
58#include <mips/atheros/ar71xxreg.h>
59
60#include <mips/atheros/ar71xx_chip.h>
61
62#include <mips/atheros/ar71xx_cpudef.h>
63
64/* XXX these should replace the current definitions in ar71xxreg.h */
65/* XXX perhaps an ar71xx_chip.h header file? */
66#define AR71XX_PLL_REG_CPU_CONFIG       AR71XX_PLL_CPU_BASE + 0x00
67#define AR71XX_PLL_REG_SEC_CONFIG       AR71XX_PLL_CPU_BASE + 0x04
68#define AR71XX_PLL_REG_ETH0_INT_CLOCK   AR71XX_PLL_CPU_BASE + 0x10
69#define AR71XX_PLL_REG_ETH1_INT_CLOCK   AR71XX_PLL_CPU_BASE + 0x14
70
71#define AR71XX_PLL_DIV_SHIFT            3
72#define AR71XX_PLL_DIV_MASK             0x1f
73#define AR71XX_CPU_DIV_SHIFT            16
74#define AR71XX_CPU_DIV_MASK             0x3
75#define AR71XX_DDR_DIV_SHIFT            18
76#define AR71XX_DDR_DIV_MASK             0x3
77#define AR71XX_AHB_DIV_SHIFT            20
78#define AR71XX_AHB_DIV_MASK             0x7
79
80/* XXX these shouldn't be in here - this file is a per-chip file */
81/* XXX these should be in the top-level ar71xx type, not ar71xx -chip */
82uint32_t u_ar71xx_cpu_freq;
83uint32_t u_ar71xx_ahb_freq;
84uint32_t u_ar71xx_ddr_freq;
85
86static void
87ar71xx_chip_detect_mem_size(void)
88{
89}
90
91static void
92ar71xx_chip_detect_sys_frequency(void)
93{
94	uint32_t pll;
95	uint32_t freq;
96	uint32_t div;
97
98	pll = ATH_READ_REG(AR71XX_PLL_REG_CPU_CONFIG);
99
100	div = ((pll >> AR71XX_PLL_DIV_SHIFT) & AR71XX_PLL_DIV_MASK) + 1;
101	freq = div * AR71XX_BASE_FREQ;
102
103	div = ((pll >> AR71XX_CPU_DIV_SHIFT) & AR71XX_CPU_DIV_MASK) + 1;
104	u_ar71xx_cpu_freq = freq / div;
105
106	div = ((pll >> AR71XX_DDR_DIV_SHIFT) & AR71XX_DDR_DIV_MASK) + 1;
107	u_ar71xx_ddr_freq = freq / div;
108
109	div = (((pll >> AR71XX_AHB_DIV_SHIFT) & AR71XX_AHB_DIV_MASK) + 1) * 2;
110	u_ar71xx_ahb_freq = u_ar71xx_cpu_freq / div;
111}
112
113/*
114 * This does not lock the CPU whilst doing the work!
115 */
116static void
117ar71xx_chip_device_stop(uint32_t mask)
118{
119	uint32_t reg;
120
121	reg = ATH_READ_REG(AR71XX_RST_RESET);
122	ATH_WRITE_REG(AR71XX_RST_RESET, reg | mask);
123}
124
125static void
126ar71xx_chip_device_start(uint32_t mask)
127{
128	uint32_t reg;
129
130	reg = ATH_READ_REG(AR71XX_RST_RESET);
131	ATH_WRITE_REG(AR71XX_RST_RESET, reg & ~mask);
132}
133
134static int
135ar71xx_chip_device_stopped(uint32_t mask)
136{
137	uint32_t reg;
138
139	reg = ATH_READ_REG(AR71XX_RST_RESET);
140        return ((reg & mask) == mask);
141}
142
143/* Speed is either 10, 100 or 1000 */
144static void
145ar71xx_chip_set_pll_ge0(int speed)
146{
147	uint32_t pll;
148
149	switch(speed) {
150		case 10:
151			pll = PLL_ETH_INT_CLK_10;
152			break;
153		case 100:
154			pll = PLL_ETH_INT_CLK_100;
155			break;
156		case 1000:
157			pll = PLL_ETH_INT_CLK_1000;
158			break;
159		default:
160			printf("ar71xx_chip_set_pll_ge0: invalid speed %d\n", speed);
161			return;
162	}
163
164	ar71xx_write_pll(AR71XX_PLL_SEC_CONFIG, AR71XX_PLL_ETH_INT0_CLK, pll, AR71XX_PLL_ETH0_SHIFT);
165}
166
167static void
168ar71xx_chip_set_pll_ge1(int speed)
169{
170	uint32_t pll;
171
172	switch(speed) {
173		case 10:
174			pll = PLL_ETH_INT_CLK_10;
175			break;
176		case 100:
177			pll = PLL_ETH_INT_CLK_100;
178			break;
179		case 1000:
180			pll = PLL_ETH_INT_CLK_1000;
181			break;
182		default:
183			printf("ar71xx_chip_set_pll_ge1: invalid speed %d\n", speed);
184			return;
185	}
186
187	ar71xx_write_pll(AR71XX_PLL_SEC_CONFIG, AR71XX_PLL_ETH_INT1_CLK, pll, AR71XX_PLL_ETH1_SHIFT);
188}
189
190static void
191ar71xx_chip_ddr_flush_ge0(void)
192{
193	ar71xx_ddr_flush(AR71XX_WB_FLUSH_GE0);
194}
195
196static void
197ar71xx_chip_ddr_flush_ge1(void)
198{
199	ar71xx_ddr_flush(AR71XX_WB_FLUSH_GE1);
200}
201
202static void
203ar71xx_chip_ddr_flush_ip2(void)
204{
205	ar71xx_ddr_flush(AR71XX_WB_FLUSH_PCI);
206}
207
208static uint32_t
209ar71xx_chip_get_eth_pll(unsigned int mac, int speed)
210{
211	return 0;
212}
213
214static void
215ar71xx_chip_init_usb_peripheral(void)
216{
217	ar71xx_device_stop(RST_RESET_USB_OHCI_DLL | RST_RESET_USB_HOST | RST_RESET_USB_PHY);
218	DELAY(1000);
219
220	ar71xx_device_start(RST_RESET_USB_OHCI_DLL | RST_RESET_USB_HOST | RST_RESET_USB_PHY);
221	DELAY(1000);
222
223	ATH_WRITE_REG(AR71XX_USB_CTRL_CONFIG,
224	    USB_CTRL_CONFIG_OHCI_DES_SWAP | USB_CTRL_CONFIG_OHCI_BUF_SWAP |
225	    USB_CTRL_CONFIG_EHCI_DES_SWAP | USB_CTRL_CONFIG_EHCI_BUF_SWAP);
226
227	ATH_WRITE_REG(AR71XX_USB_CTRL_FLADJ,
228	    (32 << USB_CTRL_FLADJ_HOST_SHIFT) | (3 << USB_CTRL_FLADJ_A5_SHIFT));
229
230	DELAY(1000);
231}
232
233struct ar71xx_cpu_def ar71xx_chip_def = {
234	&ar71xx_chip_detect_mem_size,
235	&ar71xx_chip_detect_sys_frequency,
236	&ar71xx_chip_device_stop,
237	&ar71xx_chip_device_start,
238	&ar71xx_chip_device_stopped,
239	&ar71xx_chip_set_pll_ge0,
240	&ar71xx_chip_set_pll_ge1,
241	&ar71xx_chip_ddr_flush_ge0,
242	&ar71xx_chip_ddr_flush_ge1,
243	&ar71xx_chip_get_eth_pll,
244	&ar71xx_chip_ddr_flush_ip2,
245	&ar71xx_chip_init_usb_peripheral,
246};
247