xref: /openbmc/linux/arch/mips/bcm63xx/reset.c (revision d0b73b48)
1 /*
2  * This file is subject to the terms and conditions of the GNU General Public
3  * License.  See the file "COPYING" in the main directory of this archive
4  * for more details.
5  *
6  * Copyright (C) 2012 Jonas Gorski <jonas.gorski@gmail.com>
7  */
8 
9 #include <linux/module.h>
10 #include <linux/mutex.h>
11 #include <linux/err.h>
12 #include <linux/clk.h>
13 #include <linux/delay.h>
14 #include <bcm63xx_cpu.h>
15 #include <bcm63xx_io.h>
16 #include <bcm63xx_regs.h>
17 #include <bcm63xx_reset.h>
18 
19 #define __GEN_RESET_BITS_TABLE(__cpu)					\
20 	[BCM63XX_RESET_SPI]		= BCM## __cpu ##_RESET_SPI,	\
21 	[BCM63XX_RESET_ENET]		= BCM## __cpu ##_RESET_ENET,	\
22 	[BCM63XX_RESET_USBH]		= BCM## __cpu ##_RESET_USBH,	\
23 	[BCM63XX_RESET_USBD]		= BCM## __cpu ##_RESET_USBD,	\
24 	[BCM63XX_RESET_DSL]		= BCM## __cpu ##_RESET_DSL,	\
25 	[BCM63XX_RESET_SAR]		= BCM## __cpu ##_RESET_SAR,	\
26 	[BCM63XX_RESET_EPHY]		= BCM## __cpu ##_RESET_EPHY,	\
27 	[BCM63XX_RESET_ENETSW]		= BCM## __cpu ##_RESET_ENETSW,	\
28 	[BCM63XX_RESET_PCM]		= BCM## __cpu ##_RESET_PCM,	\
29 	[BCM63XX_RESET_MPI]		= BCM## __cpu ##_RESET_MPI,	\
30 	[BCM63XX_RESET_PCIE]		= BCM## __cpu ##_RESET_PCIE,	\
31 	[BCM63XX_RESET_PCIE_EXT]	= BCM## __cpu ##_RESET_PCIE_EXT,
32 
33 #define BCM6328_RESET_SPI	SOFTRESET_6328_SPI_MASK
34 #define BCM6328_RESET_ENET	0
35 #define BCM6328_RESET_USBH	SOFTRESET_6328_USBH_MASK
36 #define BCM6328_RESET_USBD	SOFTRESET_6328_USBS_MASK
37 #define BCM6328_RESET_DSL	0
38 #define BCM6328_RESET_SAR	SOFTRESET_6328_SAR_MASK
39 #define BCM6328_RESET_EPHY	SOFTRESET_6328_EPHY_MASK
40 #define BCM6328_RESET_ENETSW	SOFTRESET_6328_ENETSW_MASK
41 #define BCM6328_RESET_PCM	SOFTRESET_6328_PCM_MASK
42 #define BCM6328_RESET_MPI	0
43 #define BCM6328_RESET_PCIE	\
44 				(SOFTRESET_6328_PCIE_MASK |		\
45 				 SOFTRESET_6328_PCIE_CORE_MASK |	\
46 				 SOFTRESET_6328_PCIE_HARD_MASK)
47 #define BCM6328_RESET_PCIE_EXT	SOFTRESET_6328_PCIE_EXT_MASK
48 
49 #define BCM6338_RESET_SPI	SOFTRESET_6338_SPI_MASK
50 #define BCM6338_RESET_ENET	SOFTRESET_6338_ENET_MASK
51 #define BCM6338_RESET_USBH	SOFTRESET_6338_USBH_MASK
52 #define BCM6338_RESET_USBD	SOFTRESET_6338_USBS_MASK
53 #define BCM6338_RESET_DSL	SOFTRESET_6338_ADSL_MASK
54 #define BCM6338_RESET_SAR	SOFTRESET_6338_SAR_MASK
55 #define BCM6338_RESET_EPHY	0
56 #define BCM6338_RESET_ENETSW	0
57 #define BCM6338_RESET_PCM	0
58 #define BCM6338_RESET_MPI	0
59 #define BCM6338_RESET_PCIE	0
60 #define BCM6338_RESET_PCIE_EXT	0
61 
62 #define BCM6348_RESET_SPI	SOFTRESET_6348_SPI_MASK
63 #define BCM6348_RESET_ENET	SOFTRESET_6348_ENET_MASK
64 #define BCM6348_RESET_USBH	SOFTRESET_6348_USBH_MASK
65 #define BCM6348_RESET_USBD	SOFTRESET_6348_USBS_MASK
66 #define BCM6348_RESET_DSL	SOFTRESET_6348_ADSL_MASK
67 #define BCM6348_RESET_SAR	SOFTRESET_6348_SAR_MASK
68 #define BCM6348_RESET_EPHY	0
69 #define BCM6348_RESET_ENETSW	0
70 #define BCM6348_RESET_PCM	0
71 #define BCM6348_RESET_MPI	0
72 #define BCM6348_RESET_PCIE	0
73 #define BCM6348_RESET_PCIE_EXT	0
74 
75 #define BCM6358_RESET_SPI	SOFTRESET_6358_SPI_MASK
76 #define BCM6358_RESET_ENET	SOFTRESET_6358_ENET_MASK
77 #define BCM6358_RESET_USBH	SOFTRESET_6358_USBH_MASK
78 #define BCM6358_RESET_USBD	0
79 #define BCM6358_RESET_DSL	SOFTRESET_6358_ADSL_MASK
80 #define BCM6358_RESET_SAR	SOFTRESET_6358_SAR_MASK
81 #define BCM6358_RESET_EPHY	SOFTRESET_6358_EPHY_MASK
82 #define BCM6358_RESET_ENETSW	0
83 #define BCM6358_RESET_PCM	SOFTRESET_6358_PCM_MASK
84 #define BCM6358_RESET_MPI	SOFTRESET_6358_MPI_MASK
85 #define BCM6358_RESET_PCIE	0
86 #define BCM6358_RESET_PCIE_EXT	0
87 
88 #define BCM6368_RESET_SPI	SOFTRESET_6368_SPI_MASK
89 #define BCM6368_RESET_ENET	0
90 #define BCM6368_RESET_USBH	SOFTRESET_6368_USBH_MASK
91 #define BCM6368_RESET_USBD	SOFTRESET_6368_USBS_MASK
92 #define BCM6368_RESET_DSL	0
93 #define BCM6368_RESET_SAR	SOFTRESET_6368_SAR_MASK
94 #define BCM6368_RESET_EPHY	SOFTRESET_6368_EPHY_MASK
95 #define BCM6368_RESET_ENETSW	0
96 #define BCM6368_RESET_PCM	SOFTRESET_6368_PCM_MASK
97 #define BCM6368_RESET_MPI	SOFTRESET_6368_MPI_MASK
98 #define BCM6368_RESET_PCIE	0
99 #define BCM6368_RESET_PCIE_EXT	0
100 
101 #ifdef BCMCPU_RUNTIME_DETECT
102 
103 /*
104  * core reset bits
105  */
106 static const u32 bcm6328_reset_bits[] = {
107 	__GEN_RESET_BITS_TABLE(6328)
108 };
109 
110 static const u32 bcm6338_reset_bits[] = {
111 	__GEN_RESET_BITS_TABLE(6338)
112 };
113 
114 static const u32 bcm6348_reset_bits[] = {
115 	__GEN_RESET_BITS_TABLE(6348)
116 };
117 
118 static const u32 bcm6358_reset_bits[] = {
119 	__GEN_RESET_BITS_TABLE(6358)
120 };
121 
122 static const u32 bcm6368_reset_bits[] = {
123 	__GEN_RESET_BITS_TABLE(6368)
124 };
125 
126 const u32 *bcm63xx_reset_bits;
127 static int reset_reg;
128 
129 static int __init bcm63xx_reset_bits_init(void)
130 {
131 	if (BCMCPU_IS_6328()) {
132 		reset_reg = PERF_SOFTRESET_6328_REG;
133 		bcm63xx_reset_bits = bcm6328_reset_bits;
134 	} else if (BCMCPU_IS_6338()) {
135 		reset_reg = PERF_SOFTRESET_REG;
136 		bcm63xx_reset_bits = bcm6338_reset_bits;
137 	} else if (BCMCPU_IS_6348()) {
138 		reset_reg = PERF_SOFTRESET_REG;
139 		bcm63xx_reset_bits = bcm6348_reset_bits;
140 	} else if (BCMCPU_IS_6358()) {
141 		reset_reg = PERF_SOFTRESET_6358_REG;
142 		bcm63xx_reset_bits = bcm6358_reset_bits;
143 	} else if (BCMCPU_IS_6368()) {
144 		reset_reg = PERF_SOFTRESET_6368_REG;
145 		bcm63xx_reset_bits = bcm6368_reset_bits;
146 	}
147 
148 	return 0;
149 }
150 #else
151 
152 #ifdef CONFIG_BCM63XX_CPU_6328
153 static const u32 bcm63xx_reset_bits[] = {
154 	__GEN_RESET_BITS_TABLE(6328)
155 };
156 #define reset_reg PERF_SOFTRESET_6328_REG
157 #endif
158 
159 #ifdef CONFIG_BCM63XX_CPU_6338
160 static const u32 bcm63xx_reset_bits[] = {
161 	__GEN_RESET_BITS_TABLE(6338)
162 };
163 #define reset_reg PERF_SOFTRESET_REG
164 #endif
165 
166 #ifdef CONFIG_BCM63XX_CPU_6345
167 static const u32 bcm63xx_reset_bits[] = { };
168 #define reset_reg 0
169 #endif
170 
171 #ifdef CONFIG_BCM63XX_CPU_6348
172 static const u32 bcm63xx_reset_bits[] = {
173 	__GEN_RESET_BITS_TABLE(6348)
174 };
175 #define reset_reg PERF_SOFTRESET_REG
176 #endif
177 
178 #ifdef CONFIG_BCM63XX_CPU_6358
179 static const u32 bcm63xx_reset_bits[] = {
180 	__GEN_RESET_BITS_TABLE(6358)
181 };
182 #define reset_reg PERF_SOFTRESET_6358_REG
183 #endif
184 
185 #ifdef CONFIG_BCM63XX_CPU_6368
186 static const u32 bcm63xx_reset_bits[] = {
187 	__GEN_RESET_BITS_TABLE(6368)
188 };
189 #define reset_reg PERF_SOFTRESET_6368_REG
190 #endif
191 
192 static int __init bcm63xx_reset_bits_init(void) { return 0; }
193 #endif
194 
195 static DEFINE_SPINLOCK(reset_mutex);
196 
197 static void __bcm63xx_core_set_reset(u32 mask, int enable)
198 {
199 	unsigned long flags;
200 	u32 val;
201 
202 	if (!mask)
203 		return;
204 
205 	spin_lock_irqsave(&reset_mutex, flags);
206 	val = bcm_perf_readl(reset_reg);
207 
208 	if (enable)
209 		val &= ~mask;
210 	else
211 		val |= mask;
212 
213 	bcm_perf_writel(val, reset_reg);
214 	spin_unlock_irqrestore(&reset_mutex, flags);
215 }
216 
217 void bcm63xx_core_set_reset(enum bcm63xx_core_reset core, int reset)
218 {
219 	__bcm63xx_core_set_reset(bcm63xx_reset_bits[core], reset);
220 }
221 EXPORT_SYMBOL(bcm63xx_core_set_reset);
222 
223 postcore_initcall(bcm63xx_reset_bits_init);
224