ar71xx_chip.c revision 228018 
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 228018 2011-11-27 11:15:59Z ray $");
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
56#include <mips/atheros/ar71xx_chip.h>
57
58#include <mips/atheros/ar71xx_cpudef.h>
59
60#include <mips/sentry5/s5reg.h>
61
62/* XXX these should replace the current definitions in ar71xxreg.h */
63/* XXX perhaps an ar71xx_chip.h header file? */
64#define AR71XX_PLL_REG_CPU_CONFIG       AR71XX_PLL_CPU_BASE + 0x00
65#define AR71XX_PLL_REG_SEC_CONFIG       AR71XX_PLL_CPU_BASE + 0x04
66#define AR71XX_PLL_REG_ETH0_INT_CLOCK   AR71XX_PLL_CPU_BASE + 0x10
67#define AR71XX_PLL_REG_ETH1_INT_CLOCK   AR71XX_PLL_CPU_BASE + 0x14
68
69#define AR71XX_PLL_DIV_SHIFT            3
70#define AR71XX_PLL_DIV_MASK             0x1f
71#define AR71XX_CPU_DIV_SHIFT            16
72#define AR71XX_CPU_DIV_MASK             0x3
73#define AR71XX_DDR_DIV_SHIFT            18
74#define AR71XX_DDR_DIV_MASK             0x3
75#define AR71XX_AHB_DIV_SHIFT            20
76#define AR71XX_AHB_DIV_MASK             0x7
77
78/* XXX these shouldn't be in here - this file is a per-chip file */
79/* XXX these should be in the top-level ar71xx type, not ar71xx -chip */
80uint32_t u_ar71xx_cpu_freq;
81uint32_t u_ar71xx_ahb_freq;
82uint32_t u_ar71xx_ddr_freq;
83
84static void
85ar71xx_chip_detect_mem_size(void)
86{
87}
88
89static void
90ar71xx_chip_detect_sys_frequency(void)
91{
92	uint32_t pll;
93	uint32_t freq;
94	uint32_t div;
95
96	pll = ATH_READ_REG(AR71XX_PLL_REG_CPU_CONFIG);
97
98	div = ((pll >> AR71XX_PLL_DIV_SHIFT) & AR71XX_PLL_DIV_MASK) + 1;
99	freq = div * AR71XX_BASE_FREQ;
100
101	div = ((pll >> AR71XX_CPU_DIV_SHIFT) & AR71XX_CPU_DIV_MASK) + 1;
102	u_ar71xx_cpu_freq = freq / div;
103
104	div = ((pll >> AR71XX_DDR_DIV_SHIFT) & AR71XX_DDR_DIV_MASK) + 1;
105	u_ar71xx_ddr_freq = freq / div;
106
107	div = (((pll >> AR71XX_AHB_DIV_SHIFT) & AR71XX_AHB_DIV_MASK) + 1) * 2;
108	u_ar71xx_ahb_freq = u_ar71xx_cpu_freq / div;
109}
110
111/*
112 * This does not lock the CPU whilst doing the work!
113 */
114static void
115ar71xx_chip_device_stop(uint32_t mask)
116{
117	uint32_t reg;
118
119	reg = ATH_READ_REG(AR71XX_RST_RESET);
120	ATH_WRITE_REG(AR71XX_RST_RESET, reg | mask);
121}
122
123static void
124ar71xx_chip_device_start(uint32_t mask)
125{
126	uint32_t reg;
127
128	reg = ATH_READ_REG(AR71XX_RST_RESET);
129	ATH_WRITE_REG(AR71XX_RST_RESET, reg & ~mask);
130}
131
132static int
133ar71xx_chip_device_stopped(uint32_t mask)
134{
135	uint32_t reg;
136
137	reg = ATH_READ_REG(AR71XX_RST_RESET);
138        return ((reg & mask) == mask);
139}
140
141/* Speed is either 10, 100 or 1000 */
142static void
143ar71xx_chip_set_pll_ge(int unit, int speed)
144{
145	uint32_t pll;
146
147	switch(speed) {
148		case 10:
149			pll = PLL_ETH_INT_CLK_10;
150			break;
151		case 100:
152			pll = PLL_ETH_INT_CLK_100;
153			break;
154		case 1000:
155			pll = PLL_ETH_INT_CLK_1000;
156			break;
157		default:
158			printf("%s%d: invalid speed %d\n",
159			    __func__, unit, speed);
160			return;
161	}
162	switch (unit) {
163	case 0:
164		ar71xx_write_pll(AR71XX_PLL_SEC_CONFIG,
165		    AR71XX_PLL_ETH_INT0_CLK, pll,
166		    AR71XX_PLL_ETH0_SHIFT);
167		break;
168	case 1:
169		ar71xx_write_pll(AR71XX_PLL_SEC_CONFIG,
170		    AR71XX_PLL_ETH_INT1_CLK, pll,
171		    AR71XX_PLL_ETH1_SHIFT);
172		break;
173	default:
174		printf("%s: invalid PLL set for arge unit: %d\n",
175		    __func__, unit);
176		return;
177	}
178}
179
180static void
181ar71xx_chip_ddr_flush_ge(int unit)
182{
183	switch (unit) {
184	case 0:
185		ar71xx_ddr_flush(AR71XX_WB_FLUSH_GE0);
186		break;
187	case 1:
188		ar71xx_ddr_flush(AR71XX_WB_FLUSH_GE1);
189		break;
190	default:
191		printf("%s: invalid DDR flush for arge unit: %d\n",
192		    __func__, unit);
193		return;
194	}
195}
196
197static void
198ar71xx_chip_ddr_flush_ip2(void)
199{
200	ar71xx_ddr_flush(AR71XX_WB_FLUSH_PCI);
201}
202
203static uint32_t
204ar71xx_chip_get_eth_pll(unsigned int mac, int speed)
205{
206	return 0;
207}
208
209static void
210ar71xx_chip_init_usb_peripheral(void)
211{
212	ar71xx_device_stop(RST_RESET_USB_OHCI_DLL | RST_RESET_USB_HOST | RST_RESET_USB_PHY);
213	DELAY(1000);
214
215	ar71xx_device_start(RST_RESET_USB_OHCI_DLL | RST_RESET_USB_HOST | RST_RESET_USB_PHY);
216	DELAY(1000);
217
218	ATH_WRITE_REG(AR71XX_USB_CTRL_CONFIG,
219	    USB_CTRL_CONFIG_OHCI_DES_SWAP | USB_CTRL_CONFIG_OHCI_BUF_SWAP |
220	    USB_CTRL_CONFIG_EHCI_DES_SWAP | USB_CTRL_CONFIG_EHCI_BUF_SWAP);
221
222	ATH_WRITE_REG(AR71XX_USB_CTRL_FLADJ,
223	    (32 << USB_CTRL_FLADJ_HOST_SHIFT) | (3 << USB_CTRL_FLADJ_A5_SHIFT));
224
225	DELAY(1000);
226}
227
228struct ar71xx_cpu_def ar71xx_chip_def = {
229	&ar71xx_chip_detect_mem_size,
230	&ar71xx_chip_detect_sys_frequency,
231	&ar71xx_chip_device_stop,
232	&ar71xx_chip_device_start,
233	&ar71xx_chip_device_stopped,
234	&ar71xx_chip_set_pll_ge,
235	&ar71xx_chip_ddr_flush_ge,
236	&ar71xx_chip_get_eth_pll,
237	&ar71xx_chip_ddr_flush_ip2,
238	&ar71xx_chip_init_usb_peripheral,
239};
240