tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 *
4 * Copyright (C) 2015 Nikolay Martynov <mar.kolya@gmail.com>
5 * Copyright (C) 2015 John Crispin <john@phrozen.org>
6 */
7
8#include <linux/kernel.h>
9#include <linux/init.h>
10
11#include <asm/mipsregs.h>
12#include <asm/smp-ops.h>
13#include <asm/mips-cps.h>
14#include <asm/mach-ralink/ralink_regs.h>
15#include <asm/mach-ralink/mt7621.h>
16
17#include <pinmux.h>
18
19#include "common.h"
20
21#define SYSC_REG_SYSCFG 0x10
22#define SYSC_REG_CPLL_CLKCFG0 0x2c
23#define SYSC_REG_CUR_CLK_STS 0x44
24#define CPU_CLK_SEL (BIT(30) | BIT(31))
25
26#define MT7621_GPIO_MODE_UART1 1
27#define MT7621_GPIO_MODE_I2C 2
28#define MT7621_GPIO_MODE_UART3_MASK 0x3
29#define MT7621_GPIO_MODE_UART3_SHIFT 3
30#define MT7621_GPIO_MODE_UART3_GPIO 1
31#define MT7621_GPIO_MODE_UART2_MASK 0x3
32#define MT7621_GPIO_MODE_UART2_SHIFT 5
33#define MT7621_GPIO_MODE_UART2_GPIO 1
34#define MT7621_GPIO_MODE_JTAG 7
35#define MT7621_GPIO_MODE_WDT_MASK 0x3
36#define MT7621_GPIO_MODE_WDT_SHIFT 8
37#define MT7621_GPIO_MODE_WDT_GPIO 1
38#define MT7621_GPIO_MODE_PCIE_RST 0
39#define MT7621_GPIO_MODE_PCIE_REF 2
40#define MT7621_GPIO_MODE_PCIE_MASK 0x3
41#define MT7621_GPIO_MODE_PCIE_SHIFT 10
42#define MT7621_GPIO_MODE_PCIE_GPIO 1
43#define MT7621_GPIO_MODE_MDIO_MASK 0x3
44#define MT7621_GPIO_MODE_MDIO_SHIFT 12
45#define MT7621_GPIO_MODE_MDIO_GPIO 1
46#define MT7621_GPIO_MODE_RGMII1 14
47#define MT7621_GPIO_MODE_RGMII2 15
48#define MT7621_GPIO_MODE_SPI_MASK 0x3
49#define MT7621_GPIO_MODE_SPI_SHIFT 16
50#define MT7621_GPIO_MODE_SPI_GPIO 1
51#define MT7621_GPIO_MODE_SDHCI_MASK 0x3
52#define MT7621_GPIO_MODE_SDHCI_SHIFT 18
53#define MT7621_GPIO_MODE_SDHCI_GPIO 1
54
55static struct rt2880_pmx_func uart1_grp[] = { FUNC("uart1", 0, 1, 2) };
56static struct rt2880_pmx_func i2c_grp[] = { FUNC("i2c", 0, 3, 2) };
57static struct rt2880_pmx_func uart3_grp[] = {
58 FUNC("uart3", 0, 5, 4),
59 FUNC("i2s", 2, 5, 4),
60 FUNC("spdif3", 3, 5, 4),
61};
62static struct rt2880_pmx_func uart2_grp[] = {
63 FUNC("uart2", 0, 9, 4),
64 FUNC("pcm", 2, 9, 4),
65 FUNC("spdif2", 3, 9, 4),
66};
67static struct rt2880_pmx_func jtag_grp[] = { FUNC("jtag", 0, 13, 5) };
68static struct rt2880_pmx_func wdt_grp[] = {
69 FUNC("wdt rst", 0, 18, 1),
70 FUNC("wdt refclk", 2, 18, 1),
71};
72static struct rt2880_pmx_func pcie_rst_grp[] = {
73 FUNC("pcie rst", MT7621_GPIO_MODE_PCIE_RST, 19, 1),
74 FUNC("pcie refclk", MT7621_GPIO_MODE_PCIE_REF, 19, 1)
75};
76static struct rt2880_pmx_func mdio_grp[] = { FUNC("mdio", 0, 20, 2) };
77static struct rt2880_pmx_func rgmii2_grp[] = { FUNC("rgmii2", 0, 22, 12) };
78static struct rt2880_pmx_func spi_grp[] = {
79 FUNC("spi", 0, 34, 7),
80 FUNC("nand1", 2, 34, 7),
81};
82static struct rt2880_pmx_func sdhci_grp[] = {
83 FUNC("sdhci", 0, 41, 8),
84 FUNC("nand2", 2, 41, 8),
85};
86static struct rt2880_pmx_func rgmii1_grp[] = { FUNC("rgmii1", 0, 49, 12) };
87
88static struct rt2880_pmx_group mt7621_pinmux_data[] = {
89 GRP("uart1", uart1_grp, 1, MT7621_GPIO_MODE_UART1),
90 GRP("i2c", i2c_grp, 1, MT7621_GPIO_MODE_I2C),
91 GRP_G("uart3", uart3_grp, MT7621_GPIO_MODE_UART3_MASK,
92 MT7621_GPIO_MODE_UART3_GPIO, MT7621_GPIO_MODE_UART3_SHIFT),
93 GRP_G("uart2", uart2_grp, MT7621_GPIO_MODE_UART2_MASK,
94 MT7621_GPIO_MODE_UART2_GPIO, MT7621_GPIO_MODE_UART2_SHIFT),
95 GRP("jtag", jtag_grp, 1, MT7621_GPIO_MODE_JTAG),
96 GRP_G("wdt", wdt_grp, MT7621_GPIO_MODE_WDT_MASK,
97 MT7621_GPIO_MODE_WDT_GPIO, MT7621_GPIO_MODE_WDT_SHIFT),
98 GRP_G("pcie", pcie_rst_grp, MT7621_GPIO_MODE_PCIE_MASK,
99 MT7621_GPIO_MODE_PCIE_GPIO, MT7621_GPIO_MODE_PCIE_SHIFT),
100 GRP_G("mdio", mdio_grp, MT7621_GPIO_MODE_MDIO_MASK,
101 MT7621_GPIO_MODE_MDIO_GPIO, MT7621_GPIO_MODE_MDIO_SHIFT),
102 GRP("rgmii2", rgmii2_grp, 1, MT7621_GPIO_MODE_RGMII2),
103 GRP_G("spi", spi_grp, MT7621_GPIO_MODE_SPI_MASK,
104 MT7621_GPIO_MODE_SPI_GPIO, MT7621_GPIO_MODE_SPI_SHIFT),
105 GRP_G("sdhci", sdhci_grp, MT7621_GPIO_MODE_SDHCI_MASK,
106 MT7621_GPIO_MODE_SDHCI_GPIO, MT7621_GPIO_MODE_SDHCI_SHIFT),
107 GRP("rgmii1", rgmii1_grp, 1, MT7621_GPIO_MODE_RGMII1),
108 { 0 }
109};
110
111phys_addr_t mips_cpc_default_phys_base(void)
112{
113 panic("Cannot detect cpc address");
114}
115
116void __init ralink_clk_init(void)
117{
118 int cpu_fdiv = 0;
119 int cpu_ffrac = 0;
120 int fbdiv = 0;
121 u32 clk_sts, syscfg;
122 u8 clk_sel = 0, xtal_mode;
123 u32 cpu_clk;
124
125 if ((rt_sysc_r32(SYSC_REG_CPLL_CLKCFG0) & CPU_CLK_SEL) != 0)
126 clk_sel = 1;
127
128 switch (clk_sel) {
129 case 0:
130 clk_sts = rt_sysc_r32(SYSC_REG_CUR_CLK_STS);
131 cpu_fdiv = ((clk_sts >> 8) & 0x1F);
132 cpu_ffrac = (clk_sts & 0x1F);
133 cpu_clk = (500 * cpu_ffrac / cpu_fdiv) * 1000 * 1000;
134 break;
135
136 case 1:
137 fbdiv = ((rt_sysc_r32(0x648) >> 4) & 0x7F) + 1;
138 syscfg = rt_sysc_r32(SYSC_REG_SYSCFG);
139 xtal_mode = (syscfg >> 6) & 0x7;
140 if (xtal_mode >= 6) {
141 /* 25Mhz Xtal */
142 cpu_clk = 25 * fbdiv * 1000 * 1000;
143 } else if (xtal_mode >= 3) {
144 /* 40Mhz Xtal */
145 cpu_clk = 40 * fbdiv * 1000 * 1000;
146 } else {
147 /* 20Mhz Xtal */
148 cpu_clk = 20 * fbdiv * 1000 * 1000;
149 }
150 break;
151 }
152}
153
154void __init ralink_of_remap(void)
155{
156 rt_sysc_membase = plat_of_remap_node("mtk,mt7621-sysc");
157 rt_memc_membase = plat_of_remap_node("mtk,mt7621-memc");
158
159 if (!rt_sysc_membase || !rt_memc_membase)
160 panic("Failed to remap core resources");
161}
162
163void prom_soc_init(struct ralink_soc_info *soc_info)
164{
165 void __iomem *sysc = (void __iomem *) KSEG1ADDR(MT7621_SYSC_BASE);
166 unsigned char *name = NULL;
167 u32 n0;
168 u32 n1;
169 u32 rev;
170
171 /* Early detection of CMP support */
172 mips_cm_probe();
173 mips_cpc_probe();
174
175 if (mips_cps_numiocu(0)) {
176 /*
177 * mips_cm_probe() wipes out bootloader
178 * config for CM regions and we have to configure them
179 * again. This SoC cannot talk to pamlbus devices
180 * witout proper iocu region set up.
181 *
182 * FIXME: it would be better to do this with values
183 * from DT, but we need this very early because
184 * without this we cannot talk to pretty much anything
185 * including serial.
186 */
187 write_gcr_reg0_base(MT7621_PALMBUS_BASE);
188 write_gcr_reg0_mask(~MT7621_PALMBUS_SIZE |
189 CM_GCR_REGn_MASK_CMTGT_IOCU0);
190 __sync();
191 }
192
193 n0 = __raw_readl(sysc + SYSC_REG_CHIP_NAME0);
194 n1 = __raw_readl(sysc + SYSC_REG_CHIP_NAME1);
195
196 if (n0 == MT7621_CHIP_NAME0 && n1 == MT7621_CHIP_NAME1) {
197 name = "MT7621";
198 soc_info->compatible = "mtk,mt7621-soc";
199 } else {
200 panic("mt7621: unknown SoC, n0:%08x n1:%08x\n", n0, n1);
201 }
202 ralink_soc = MT762X_SOC_MT7621AT;
203 rev = __raw_readl(sysc + SYSC_REG_CHIP_REV);
204
205 snprintf(soc_info->sys_type, RAMIPS_SYS_TYPE_LEN,
206 "MediaTek %s ver:%u eco:%u",
207 name,
208 (rev >> CHIP_REV_VER_SHIFT) & CHIP_REV_VER_MASK,
209 (rev & CHIP_REV_ECO_MASK));
210
211 soc_info->mem_size_min = MT7621_DDR2_SIZE_MIN;
212 soc_info->mem_size_max = MT7621_DDR2_SIZE_MAX;
213 soc_info->mem_base = MT7621_DRAM_BASE;
214
215 rt2880_pinmux_data = mt7621_pinmux_data;
216
217
218 if (!register_cps_smp_ops())
219 return;
220 if (!register_cmp_smp_ops())
221 return;
222 if (!register_vsmp_smp_ops())
223 return;
224}