1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Atheros AR71XX/AR724X/AR913X common routines
4 *
5 * Copyright (C) 2010-2011 Jaiganesh Narayanan <jnarayanan@atheros.com>
6 * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
7 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
8 *
9 * Parts of this file are based on Atheros' 2.6.15/2.6.31 BSP
10 */
11
12 #include <linux/kernel.h>
13 #include <linux/export.h>
14 #include <linux/types.h>
15 #include <linux/spinlock.h>
16
17 #include <asm/mach-ath79/ath79.h>
18 #include <asm/mach-ath79/ar71xx_regs.h>
19 #include "common.h"
20
21 static DEFINE_SPINLOCK(ath79_device_reset_lock);
22
23 u32 ath79_cpu_freq;
24 EXPORT_SYMBOL_GPL(ath79_cpu_freq);
25
26 u32 ath79_ahb_freq;
27 EXPORT_SYMBOL_GPL(ath79_ahb_freq);
28
29 u32 ath79_ddr_freq;
30 EXPORT_SYMBOL_GPL(ath79_ddr_freq);
31
32 enum ath79_soc_type ath79_soc;
33 unsigned int ath79_soc_rev;
34
35 void __iomem *ath79_pll_base;
36 void __iomem *ath79_reset_base;
37 EXPORT_SYMBOL_GPL(ath79_reset_base);
38 static void __iomem *ath79_ddr_base;
39 static void __iomem *ath79_ddr_wb_flush_base;
40 static void __iomem *ath79_ddr_pci_win_base;
41
42 void ath79_ddr_ctrl_init(void)
43 {
44 ath79_ddr_base = ioremap(AR71XX_DDR_CTRL_BASE,
45 AR71XX_DDR_CTRL_SIZE);
46 if (soc_is_ar913x() || soc_is_ar724x() || soc_is_ar933x()) {
47 ath79_ddr_wb_flush_base = ath79_ddr_base + 0x7c;
48 ath79_ddr_pci_win_base = 0;
49 } else {
50 ath79_ddr_wb_flush_base = ath79_ddr_base + 0x9c;
51 ath79_ddr_pci_win_base = ath79_ddr_base + 0x7c;
52 }
53 }
54 EXPORT_SYMBOL_GPL(ath79_ddr_ctrl_init);
55
56 void ath79_ddr_wb_flush(u32 reg)
57 {
58 void __iomem *flush_reg = ath79_ddr_wb_flush_base + (reg * 4);
59
60 /* Flush the DDR write buffer. */
61 __raw_writel(0x1, flush_reg);
62 while (__raw_readl(flush_reg) & 0x1)
63 ;
64
65 /* It must be run twice. */
66 __raw_writel(0x1, flush_reg);
67 while (__raw_readl(flush_reg) & 0x1)
68 ;
69 }
70 EXPORT_SYMBOL_GPL(ath79_ddr_wb_flush);
71
72 void ath79_ddr_set_pci_windows(void)
73 {
74 BUG_ON(!ath79_ddr_pci_win_base);
75
76 __raw_writel(AR71XX_PCI_WIN0_OFFS, ath79_ddr_pci_win_base + 0x0);
77 __raw_writel(AR71XX_PCI_WIN1_OFFS, ath79_ddr_pci_win_base + 0x4);
78 __raw_writel(AR71XX_PCI_WIN2_OFFS, ath79_ddr_pci_win_base + 0x8);
79 __raw_writel(AR71XX_PCI_WIN3_OFFS, ath79_ddr_pci_win_base + 0xc);
80 __raw_writel(AR71XX_PCI_WIN4_OFFS, ath79_ddr_pci_win_base + 0x10);
81 __raw_writel(AR71XX_PCI_WIN5_OFFS, ath79_ddr_pci_win_base + 0x14);
82 __raw_writel(AR71XX_PCI_WIN6_OFFS, ath79_ddr_pci_win_base + 0x18);
83 __raw_writel(AR71XX_PCI_WIN7_OFFS, ath79_ddr_pci_win_base + 0x1c);
84 }
85 EXPORT_SYMBOL_GPL(ath79_ddr_set_pci_windows);
86
87 void ath79_device_reset_set(u32 mask)
88 {
89 unsigned long flags;
90 u32 reg;
91 u32 t;
92
93 if (soc_is_ar71xx())
94 reg = AR71XX_RESET_REG_RESET_MODULE;
95 else if (soc_is_ar724x())
96 reg = AR724X_RESET_REG_RESET_MODULE;
97 else if (soc_is_ar913x())
98 reg = AR913X_RESET_REG_RESET_MODULE;
99 else if (soc_is_ar933x())
100 reg = AR933X_RESET_REG_RESET_MODULE;
101 else if (soc_is_ar934x())
102 reg = AR934X_RESET_REG_RESET_MODULE;
103 else if (soc_is_qca953x())
104 reg = QCA953X_RESET_REG_RESET_MODULE;
105 else if (soc_is_qca955x())
106 reg = QCA955X_RESET_REG_RESET_MODULE;
107 else if (soc_is_qca956x() || soc_is_tp9343())
108 reg = QCA956X_RESET_REG_RESET_MODULE;
109 else
110 BUG();
111
112 spin_lock_irqsave(&ath79_device_reset_lock, flags);
113 t = ath79_reset_rr(reg);
114 ath79_reset_wr(reg, t | mask);
115 spin_unlock_irqrestore(&ath79_device_reset_lock, flags);
116 }
117 EXPORT_SYMBOL_GPL(ath79_device_reset_set);
118
119 void ath79_device_reset_clear(u32 mask)
120 {
121 unsigned long flags;
122 u32 reg;
123 u32 t;
124
125 if (soc_is_ar71xx())
126 reg = AR71XX_RESET_REG_RESET_MODULE;
127 else if (soc_is_ar724x())
128 reg = AR724X_RESET_REG_RESET_MODULE;
129 else if (soc_is_ar913x())
130 reg = AR913X_RESET_REG_RESET_MODULE;
131 else if (soc_is_ar933x())
132 reg = AR933X_RESET_REG_RESET_MODULE;
133 else if (soc_is_ar934x())
134 reg = AR934X_RESET_REG_RESET_MODULE;
135 else if (soc_is_qca953x())
136 reg = QCA953X_RESET_REG_RESET_MODULE;
137 else if (soc_is_qca955x())
138 reg = QCA955X_RESET_REG_RESET_MODULE;
139 else if (soc_is_qca956x() || soc_is_tp9343())
140 reg = QCA956X_RESET_REG_RESET_MODULE;
141 else
142 BUG();
143
144 spin_lock_irqsave(&ath79_device_reset_lock, flags);
145 t = ath79_reset_rr(reg);
146 ath79_reset_wr(reg, t & ~mask);
147 spin_unlock_irqrestore(&ath79_device_reset_lock, flags);
148 }
149 EXPORT_SYMBOL_GPL(ath79_device_reset_clear);
150
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.