1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * Copyright (C) 2006,2007 Felix Fietkau <nbd@openwrt.org>
4  * Copyright (C) 2006,2007 Eugene Konev <ejka@openwrt.org>
5  */
6 
7 #ifndef __AR7_H__
8 #define __AR7_H__
9 
10 #include <linux/delay.h>
11 #include <linux/io.h>
12 #include <linux/errno.h>
13 
14 #include <asm/addrspace.h>
15 
16 #define AR7_SDRAM_BASE	0x14000000
17 
18 #define AR7_REGS_BASE	0x08610000
19 
20 #define AR7_REGS_MAC0	(AR7_REGS_BASE + 0x0000)
21 #define AR7_REGS_GPIO	(AR7_REGS_BASE + 0x0900)
22 /* 0x08610A00 - 0x08610BFF (512 bytes, 128 bytes / clock) */
23 #define AR7_REGS_POWER	(AR7_REGS_BASE + 0x0a00)
24 #define AR7_REGS_CLOCKS (AR7_REGS_POWER + 0x80)
25 #define UR8_REGS_CLOCKS (AR7_REGS_POWER + 0x20)
26 #define AR7_REGS_UART0	(AR7_REGS_BASE + 0x0e00)
27 #define AR7_REGS_USB	(AR7_REGS_BASE + 0x1200)
28 #define AR7_REGS_RESET	(AR7_REGS_BASE + 0x1600)
29 #define AR7_REGS_PINSEL (AR7_REGS_BASE + 0x160C)
30 #define AR7_REGS_VLYNQ0 (AR7_REGS_BASE + 0x1800)
31 #define AR7_REGS_DCL	(AR7_REGS_BASE + 0x1a00)
32 #define AR7_REGS_VLYNQ1 (AR7_REGS_BASE + 0x1c00)
33 #define AR7_REGS_MDIO	(AR7_REGS_BASE + 0x1e00)
34 #define AR7_REGS_IRQ	(AR7_REGS_BASE + 0x2400)
35 #define AR7_REGS_MAC1	(AR7_REGS_BASE + 0x2800)
36 
37 #define AR7_REGS_WDT	(AR7_REGS_BASE + 0x1f00)
38 #define UR8_REGS_WDT	(AR7_REGS_BASE + 0x0b00)
39 #define UR8_REGS_UART1	(AR7_REGS_BASE + 0x0f00)
40 
41 /* Titan registers */
42 #define TITAN_REGS_ESWITCH_BASE (0x08640000)
43 #define TITAN_REGS_MAC0		(TITAN_REGS_ESWITCH_BASE)
44 #define TITAN_REGS_MAC1		(TITAN_REGS_ESWITCH_BASE + 0x0800)
45 #define TITAN_REGS_MDIO		(TITAN_REGS_ESWITCH_BASE + 0x02000)
46 #define TITAN_REGS_VLYNQ0	(AR7_REGS_BASE + 0x1c00)
47 #define TITAN_REGS_VLYNQ1	(AR7_REGS_BASE + 0x1300)
48 
49 #define AR7_RESET_PERIPHERAL	0x0
50 #define AR7_RESET_SOFTWARE	0x4
51 #define AR7_RESET_STATUS	0x8
52 
53 #define AR7_RESET_BIT_CPMAC_LO	17
54 #define AR7_RESET_BIT_CPMAC_HI	21
55 #define AR7_RESET_BIT_MDIO	22
56 #define AR7_RESET_BIT_EPHY	26
57 
58 #define TITAN_RESET_BIT_EPHY1	28
59 
60 /* GPIO control registers */
61 #define AR7_GPIO_INPUT	0x0
62 #define AR7_GPIO_OUTPUT 0x4
63 #define AR7_GPIO_DIR	0x8
64 #define AR7_GPIO_ENABLE 0xc
65 #define TITAN_GPIO_INPUT_0	0x0
66 #define TITAN_GPIO_INPUT_1	0x4
67 #define TITAN_GPIO_OUTPUT_0	0x8
68 #define TITAN_GPIO_OUTPUT_1	0xc
69 #define TITAN_GPIO_DIR_0	0x10
70 #define TITAN_GPIO_DIR_1	0x14
71 #define TITAN_GPIO_ENBL_0	0x18
72 #define TITAN_GPIO_ENBL_1	0x1c
73 
74 #define AR7_CHIP_7100	0x18
75 #define AR7_CHIP_7200	0x2b
76 #define AR7_CHIP_7300	0x05
77 #define AR7_CHIP_TITAN	0x07
78 #define TITAN_CHIP_1050 0x0f
79 #define TITAN_CHIP_1055 0x0e
80 #define TITAN_CHIP_1056 0x0d
81 #define TITAN_CHIP_1060 0x07
82 
83 /* Interrupts */
84 #define AR7_IRQ_UART0	15
85 #define AR7_IRQ_UART1	16
86 
87 /* Clocks */
88 #define AR7_AFE_CLOCK	35328000
89 #define AR7_REF_CLOCK	25000000
90 #define AR7_XTAL_CLOCK	24000000
91 
92 /* DCL */
93 #define AR7_WDT_HW_ENA	0x10
94 
95 struct plat_cpmac_data {
96 	int reset_bit;
97 	int power_bit;
98 	u32 phy_mask;
99 	char dev_addr[6];
100 };
101 
102 struct plat_dsl_data {
103 	int reset_bit_dsl;
104 	int reset_bit_sar;
105 };
106 
ar7_is_titan(void)107 static inline int ar7_is_titan(void)
108 {
109 	return (readl((void *)KSEG1ADDR(AR7_REGS_GPIO + 0x24)) & 0xffff) ==
110 		AR7_CHIP_TITAN;
111 }
112 
ar7_chip_id(void)113 static inline u16 ar7_chip_id(void)
114 {
115 	return ar7_is_titan() ? AR7_CHIP_TITAN : (readl((void *)
116 		KSEG1ADDR(AR7_REGS_GPIO + 0x14)) & 0xffff);
117 }
118 
titan_chip_id(void)119 static inline u16 titan_chip_id(void)
120 {
121 	unsigned int val = readl((void *)KSEG1ADDR(AR7_REGS_GPIO +
122 						TITAN_GPIO_INPUT_1));
123 	return ((val >> 12) & 0x0f);
124 }
125 
ar7_chip_rev(void)126 static inline u8 ar7_chip_rev(void)
127 {
128 	return (readl((void *)KSEG1ADDR(AR7_REGS_GPIO + (ar7_is_titan() ? 0x24 :
129 		0x14))) >> 16) & 0xff;
130 }
131 
ar7_has_high_cpmac(void)132 static inline int ar7_has_high_cpmac(void)
133 {
134 	u16 chip_id = ar7_chip_id();
135 	switch (chip_id) {
136 	case AR7_CHIP_7100:
137 	case AR7_CHIP_7200:
138 		return 0;
139 	case AR7_CHIP_7300:
140 		return 1;
141 	default:
142 		return -ENXIO;
143 	}
144 }
145 #define ar7_has_high_vlynq ar7_has_high_cpmac
146 #define ar7_has_second_uart ar7_has_high_cpmac
147 
ar7_device_enable(u32 bit)148 static inline void ar7_device_enable(u32 bit)
149 {
150 	void *reset_reg =
151 		(void *)KSEG1ADDR(AR7_REGS_RESET + AR7_RESET_PERIPHERAL);
152 	writel(readl(reset_reg) | (1 << bit), reset_reg);
153 	msleep(20);
154 }
155 
ar7_device_disable(u32 bit)156 static inline void ar7_device_disable(u32 bit)
157 {
158 	void *reset_reg =
159 		(void *)KSEG1ADDR(AR7_REGS_RESET + AR7_RESET_PERIPHERAL);
160 	writel(readl(reset_reg) & ~(1 << bit), reset_reg);
161 	msleep(20);
162 }
163 
ar7_device_reset(u32 bit)164 static inline void ar7_device_reset(u32 bit)
165 {
166 	ar7_device_disable(bit);
167 	ar7_device_enable(bit);
168 }
169 
ar7_device_on(u32 bit)170 static inline void ar7_device_on(u32 bit)
171 {
172 	void *power_reg = (void *)KSEG1ADDR(AR7_REGS_POWER);
173 	writel(readl(power_reg) | (1 << bit), power_reg);
174 	msleep(20);
175 }
176 
ar7_device_off(u32 bit)177 static inline void ar7_device_off(u32 bit)
178 {
179 	void *power_reg = (void *)KSEG1ADDR(AR7_REGS_POWER);
180 	writel(readl(power_reg) & ~(1 << bit), power_reg);
181 	msleep(20);
182 }
183 
184 int __init ar7_gpio_init(void);
185 void __init ar7_init_clocks(void);
186 
187 /* Board specific GPIO functions */
188 int ar7_gpio_enable(unsigned gpio);
189 int ar7_gpio_disable(unsigned gpio);
190 
191 #endif /* __AR7_H__ */
192