2 * This program is free software; you can redistribute it and/or modify it
3 * under the terms of the GNU General Public License version 2 as published
4 * by the Free Software Foundation.
6 * Parts of this file are based on Ralink's 2.6.21 BSP
8 * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
9 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
10 * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/module.h>
17 #include <asm/mipsregs.h>
18 #include <asm/mach-ralink/ralink_regs.h>
19 #include <asm/mach-ralink/mt7620.h>
20 #include <asm/mach-ralink/pinmux.h>
26 #define PMU_SW_SET BIT(28)
27 #define A_DCDC_EN BIT(24)
28 #define A_SSC_PERI BIT(19)
29 #define A_SSC_GEN BIT(18)
34 #define A_VTUNE_M 0xff
38 #define DIG_SW_SEL BIT(25)
41 #define EFUSE_MT7688 0x100000
44 #define DRAM_TYPE_MT7628_MASK 0x1
46 /* does the board have sdram or ddram */
49 static struct rt2880_pmx_func i2c_grp[] = { FUNC("i2c", 0, 1, 2) };
50 static struct rt2880_pmx_func spi_grp[] = { FUNC("spi", 0, 3, 4) };
51 static struct rt2880_pmx_func uartlite_grp[] = { FUNC("uartlite", 0, 15, 2) };
52 static struct rt2880_pmx_func mdio_grp[] = { FUNC("mdio", 0, 22, 2) };
53 static struct rt2880_pmx_func rgmii1_grp[] = { FUNC("rgmii1", 0, 24, 12) };
54 static struct rt2880_pmx_func refclk_grp[] = { FUNC("spi refclk", 0, 37, 3) };
55 static struct rt2880_pmx_func ephy_grp[] = { FUNC("ephy", 0, 40, 5) };
56 static struct rt2880_pmx_func rgmii2_grp[] = { FUNC("rgmii2", 0, 60, 12) };
57 static struct rt2880_pmx_func wled_grp[] = { FUNC("wled", 0, 72, 1) };
58 static struct rt2880_pmx_func pa_grp[] = { FUNC("pa", 0, 18, 4) };
59 static struct rt2880_pmx_func uartf_grp[] = {
60 FUNC("uartf", MT7620_GPIO_MODE_UARTF, 7, 8),
61 FUNC("pcm uartf", MT7620_GPIO_MODE_PCM_UARTF, 7, 8),
62 FUNC("pcm i2s", MT7620_GPIO_MODE_PCM_I2S, 7, 8),
63 FUNC("i2s uartf", MT7620_GPIO_MODE_I2S_UARTF, 7, 8),
64 FUNC("pcm gpio", MT7620_GPIO_MODE_PCM_GPIO, 11, 4),
65 FUNC("gpio uartf", MT7620_GPIO_MODE_GPIO_UARTF, 7, 4),
66 FUNC("gpio i2s", MT7620_GPIO_MODE_GPIO_I2S, 7, 4),
68 static struct rt2880_pmx_func wdt_grp[] = {
69 FUNC("wdt rst", 0, 17, 1),
70 FUNC("wdt refclk", 0, 17, 1),
72 static struct rt2880_pmx_func pcie_rst_grp[] = {
73 FUNC("pcie rst", MT7620_GPIO_MODE_PCIE_RST, 36, 1),
74 FUNC("pcie refclk", MT7620_GPIO_MODE_PCIE_REF, 36, 1)
76 static struct rt2880_pmx_func nd_sd_grp[] = {
77 FUNC("nand", MT7620_GPIO_MODE_NAND, 45, 15),
78 FUNC("sd", MT7620_GPIO_MODE_SD, 45, 15)
81 static struct rt2880_pmx_group mt7620a_pinmux_data[] = {
82 GRP("i2c", i2c_grp, 1, MT7620_GPIO_MODE_I2C),
83 GRP("uartf", uartf_grp, MT7620_GPIO_MODE_UART0_MASK,
84 MT7620_GPIO_MODE_UART0_SHIFT),
85 GRP("spi", spi_grp, 1, MT7620_GPIO_MODE_SPI),
86 GRP("uartlite", uartlite_grp, 1, MT7620_GPIO_MODE_UART1),
87 GRP_G("wdt", wdt_grp, MT7620_GPIO_MODE_WDT_MASK,
88 MT7620_GPIO_MODE_WDT_GPIO, MT7620_GPIO_MODE_WDT_SHIFT),
89 GRP("mdio", mdio_grp, 1, MT7620_GPIO_MODE_MDIO),
90 GRP("rgmii1", rgmii1_grp, 1, MT7620_GPIO_MODE_RGMII1),
91 GRP("spi refclk", refclk_grp, 1, MT7620_GPIO_MODE_SPI_REF_CLK),
92 GRP_G("pcie", pcie_rst_grp, MT7620_GPIO_MODE_PCIE_MASK,
93 MT7620_GPIO_MODE_PCIE_GPIO, MT7620_GPIO_MODE_PCIE_SHIFT),
94 GRP_G("nd_sd", nd_sd_grp, MT7620_GPIO_MODE_ND_SD_MASK,
95 MT7620_GPIO_MODE_ND_SD_GPIO, MT7620_GPIO_MODE_ND_SD_SHIFT),
96 GRP("rgmii2", rgmii2_grp, 1, MT7620_GPIO_MODE_RGMII2),
97 GRP("wled", wled_grp, 1, MT7620_GPIO_MODE_WLED),
98 GRP("ephy", ephy_grp, 1, MT7620_GPIO_MODE_EPHY),
99 GRP("pa", pa_grp, 1, MT7620_GPIO_MODE_PA),
103 static struct rt2880_pmx_func pwm1_grp_mt7628[] = {
104 FUNC("sdcx", 3, 19, 1),
105 FUNC("utif", 2, 19, 1),
106 FUNC("gpio", 1, 19, 1),
107 FUNC("pwm", 0, 19, 1),
110 static struct rt2880_pmx_func pwm0_grp_mt7628[] = {
111 FUNC("sdcx", 3, 18, 1),
112 FUNC("utif", 2, 18, 1),
113 FUNC("gpio", 1, 18, 1),
114 FUNC("pwm", 0, 18, 1),
117 static struct rt2880_pmx_func uart2_grp_mt7628[] = {
118 FUNC("sdcx", 3, 20, 2),
119 FUNC("pwm", 2, 20, 2),
120 FUNC("gpio", 1, 20, 2),
121 FUNC("uart", 0, 20, 2),
124 static struct rt2880_pmx_func uart1_grp_mt7628[] = {
125 FUNC("sdcx", 3, 45, 2),
126 FUNC("pwm", 2, 45, 2),
127 FUNC("gpio", 1, 45, 2),
128 FUNC("uart", 0, 45, 2),
131 static struct rt2880_pmx_func i2c_grp_mt7628[] = {
133 FUNC("debug", 2, 4, 2),
134 FUNC("gpio", 1, 4, 2),
135 FUNC("i2c", 0, 4, 2),
138 static struct rt2880_pmx_func refclk_grp_mt7628[] = { FUNC("reclk", 0, 36, 1) };
139 static struct rt2880_pmx_func perst_grp_mt7628[] = { FUNC("perst", 0, 37, 1) };
140 static struct rt2880_pmx_func wdt_grp_mt7628[] = { FUNC("wdt", 0, 15, 38) };
141 static struct rt2880_pmx_func spi_grp_mt7628[] = { FUNC("spi", 0, 7, 4) };
143 static struct rt2880_pmx_func sd_mode_grp_mt7628[] = {
144 FUNC("jtag", 3, 22, 8),
145 FUNC("utif", 2, 22, 8),
146 FUNC("gpio", 1, 22, 8),
147 FUNC("sdcx", 0, 22, 8),
150 static struct rt2880_pmx_func uart0_grp_mt7628[] = {
153 FUNC("gpio", 1, 12, 2),
154 FUNC("uart", 0, 12, 2),
157 static struct rt2880_pmx_func i2s_grp_mt7628[] = {
158 FUNC("antenna", 3, 0, 4),
159 FUNC("pcm", 2, 0, 4),
160 FUNC("gpio", 1, 0, 4),
161 FUNC("i2s", 0, 0, 4),
164 static struct rt2880_pmx_func spi_cs1_grp_mt7628[] = {
166 FUNC("refclk", 2, 6, 1),
167 FUNC("gpio", 1, 6, 1),
168 FUNC("spi", 0, 6, 1),
171 static struct rt2880_pmx_func spis_grp_mt7628[] = {
172 FUNC("pwm", 3, 14, 4),
173 FUNC("util", 2, 14, 4),
174 FUNC("gpio", 1, 14, 4),
175 FUNC("spis", 0, 14, 4),
178 static struct rt2880_pmx_func gpio_grp_mt7628[] = {
179 FUNC("pcie", 3, 11, 1),
180 FUNC("refclk", 2, 11, 1),
181 FUNC("gpio", 1, 11, 1),
182 FUNC("gpio", 0, 11, 1),
185 #define MT7628_GPIO_MODE_MASK 0x3
187 #define MT7628_GPIO_MODE_PWM1 30
188 #define MT7628_GPIO_MODE_PWM0 28
189 #define MT7628_GPIO_MODE_UART2 26
190 #define MT7628_GPIO_MODE_UART1 24
191 #define MT7628_GPIO_MODE_I2C 20
192 #define MT7628_GPIO_MODE_REFCLK 18
193 #define MT7628_GPIO_MODE_PERST 16
194 #define MT7628_GPIO_MODE_WDT 14
195 #define MT7628_GPIO_MODE_SPI 12
196 #define MT7628_GPIO_MODE_SDMODE 10
197 #define MT7628_GPIO_MODE_UART0 8
198 #define MT7628_GPIO_MODE_I2S 6
199 #define MT7628_GPIO_MODE_CS1 4
200 #define MT7628_GPIO_MODE_SPIS 2
201 #define MT7628_GPIO_MODE_GPIO 0
203 static struct rt2880_pmx_group mt7628an_pinmux_data[] = {
204 GRP_G("pmw1", pwm1_grp_mt7628, MT7628_GPIO_MODE_MASK,
205 1, MT7628_GPIO_MODE_PWM1),
206 GRP_G("pmw1", pwm0_grp_mt7628, MT7628_GPIO_MODE_MASK,
207 1, MT7628_GPIO_MODE_PWM0),
208 GRP_G("uart2", uart2_grp_mt7628, MT7628_GPIO_MODE_MASK,
209 1, MT7628_GPIO_MODE_UART2),
210 GRP_G("uart1", uart1_grp_mt7628, MT7628_GPIO_MODE_MASK,
211 1, MT7628_GPIO_MODE_UART1),
212 GRP_G("i2c", i2c_grp_mt7628, MT7628_GPIO_MODE_MASK,
213 1, MT7628_GPIO_MODE_I2C),
214 GRP("refclk", refclk_grp_mt7628, 1, MT7628_GPIO_MODE_REFCLK),
215 GRP("perst", perst_grp_mt7628, 1, MT7628_GPIO_MODE_PERST),
216 GRP("wdt", wdt_grp_mt7628, 1, MT7628_GPIO_MODE_WDT),
217 GRP("spi", spi_grp_mt7628, 1, MT7628_GPIO_MODE_SPI),
218 GRP_G("sdmode", sd_mode_grp_mt7628, MT7628_GPIO_MODE_MASK,
219 1, MT7628_GPIO_MODE_SDMODE),
220 GRP_G("uart0", uart0_grp_mt7628, MT7628_GPIO_MODE_MASK,
221 1, MT7628_GPIO_MODE_UART0),
222 GRP_G("i2s", i2s_grp_mt7628, MT7628_GPIO_MODE_MASK,
223 1, MT7628_GPIO_MODE_I2S),
224 GRP_G("spi cs1", spi_cs1_grp_mt7628, MT7628_GPIO_MODE_MASK,
225 1, MT7628_GPIO_MODE_CS1),
226 GRP_G("spis", spis_grp_mt7628, MT7628_GPIO_MODE_MASK,
227 1, MT7628_GPIO_MODE_SPIS),
228 GRP_G("gpio", gpio_grp_mt7628, MT7628_GPIO_MODE_MASK,
229 1, MT7628_GPIO_MODE_GPIO),
233 static inline int is_mt76x8(void)
235 return ralink_soc == MT762X_SOC_MT7628AN ||
236 ralink_soc == MT762X_SOC_MT7688;
240 mt7620_calc_rate(u32 ref_rate, u32 mul, u32 div)
251 #define MHZ(x) ((x) * 1000 * 1000)
253 static __init unsigned long
254 mt7620_get_xtal_rate(void)
258 reg = rt_sysc_r32(SYSC_REG_SYSTEM_CONFIG0);
259 if (reg & SYSCFG0_XTAL_FREQ_SEL)
265 static __init unsigned long
266 mt7620_get_periph_rate(unsigned long xtal_rate)
270 reg = rt_sysc_r32(SYSC_REG_CLKCFG0);
271 if (reg & CLKCFG0_PERI_CLK_SEL)
277 static const u32 mt7620_clk_divider[] __initconst = { 2, 3, 4, 8 };
279 static __init unsigned long
280 mt7620_get_cpu_pll_rate(unsigned long xtal_rate)
286 reg = rt_sysc_r32(SYSC_REG_CPLL_CONFIG0);
287 if (reg & CPLL_CFG0_BYPASS_REF_CLK)
290 if ((reg & CPLL_CFG0_SW_CFG) == 0)
293 mul = (reg >> CPLL_CFG0_PLL_MULT_RATIO_SHIFT) &
294 CPLL_CFG0_PLL_MULT_RATIO_MASK;
296 if (reg & CPLL_CFG0_LC_CURFCK)
299 div = (reg >> CPLL_CFG0_PLL_DIV_RATIO_SHIFT) &
300 CPLL_CFG0_PLL_DIV_RATIO_MASK;
302 WARN_ON(div >= ARRAY_SIZE(mt7620_clk_divider));
304 return mt7620_calc_rate(xtal_rate, mul, mt7620_clk_divider[div]);
307 static __init unsigned long
308 mt7620_get_pll_rate(unsigned long xtal_rate, unsigned long cpu_pll_rate)
312 reg = rt_sysc_r32(SYSC_REG_CPLL_CONFIG1);
313 if (reg & CPLL_CFG1_CPU_AUX1)
316 if (reg & CPLL_CFG1_CPU_AUX0)
322 static __init unsigned long
323 mt7620_get_cpu_rate(unsigned long pll_rate)
329 reg = rt_sysc_r32(SYSC_REG_CPU_SYS_CLKCFG);
331 mul = reg & CPU_SYS_CLKCFG_CPU_FFRAC_MASK;
332 div = (reg >> CPU_SYS_CLKCFG_CPU_FDIV_SHIFT) &
333 CPU_SYS_CLKCFG_CPU_FDIV_MASK;
335 return mt7620_calc_rate(pll_rate, mul, div);
338 static const u32 mt7620_ocp_dividers[16] __initconst = {
339 [CPU_SYS_CLKCFG_OCP_RATIO_2] = 2,
340 [CPU_SYS_CLKCFG_OCP_RATIO_3] = 3,
341 [CPU_SYS_CLKCFG_OCP_RATIO_4] = 4,
342 [CPU_SYS_CLKCFG_OCP_RATIO_5] = 5,
343 [CPU_SYS_CLKCFG_OCP_RATIO_10] = 10,
346 static __init unsigned long
347 mt7620_get_dram_rate(unsigned long pll_rate)
349 if (dram_type == SYSCFG0_DRAM_TYPE_SDRAM)
355 static __init unsigned long
356 mt7620_get_sys_rate(unsigned long cpu_rate)
362 reg = rt_sysc_r32(SYSC_REG_CPU_SYS_CLKCFG);
364 ocp_ratio = (reg >> CPU_SYS_CLKCFG_OCP_RATIO_SHIFT) &
365 CPU_SYS_CLKCFG_OCP_RATIO_MASK;
367 if (WARN_ON(ocp_ratio >= ARRAY_SIZE(mt7620_ocp_dividers)))
370 div = mt7620_ocp_dividers[ocp_ratio];
371 if (WARN(!div, "invalid divider for OCP ratio %u", ocp_ratio))
374 return cpu_rate / div;
377 void __init ralink_clk_init(void)
379 unsigned long xtal_rate;
380 unsigned long cpu_pll_rate;
381 unsigned long pll_rate;
382 unsigned long cpu_rate;
383 unsigned long sys_rate;
384 unsigned long dram_rate;
385 unsigned long periph_rate;
387 xtal_rate = mt7620_get_xtal_rate();
389 #define RFMT(label) label ":%lu.%03luMHz "
390 #define RINT(x) ((x) / 1000000)
391 #define RFRAC(x) (((x) / 1000) % 1000)
394 if (xtal_rate == MHZ(40))
398 dram_rate = sys_rate = cpu_rate / 3;
399 periph_rate = MHZ(40);
401 ralink_clk_add("10000d00.uartlite", periph_rate);
402 ralink_clk_add("10000e00.uartlite", periph_rate);
404 cpu_pll_rate = mt7620_get_cpu_pll_rate(xtal_rate);
405 pll_rate = mt7620_get_pll_rate(xtal_rate, cpu_pll_rate);
407 cpu_rate = mt7620_get_cpu_rate(pll_rate);
408 dram_rate = mt7620_get_dram_rate(pll_rate);
409 sys_rate = mt7620_get_sys_rate(cpu_rate);
410 periph_rate = mt7620_get_periph_rate(xtal_rate);
412 pr_debug(RFMT("XTAL") RFMT("CPU_PLL") RFMT("PLL"),
413 RINT(xtal_rate), RFRAC(xtal_rate),
414 RINT(cpu_pll_rate), RFRAC(cpu_pll_rate),
415 RINT(pll_rate), RFRAC(pll_rate));
417 ralink_clk_add("10000500.uart", periph_rate);
420 pr_debug(RFMT("CPU") RFMT("DRAM") RFMT("SYS") RFMT("PERIPH"),
421 RINT(cpu_rate), RFRAC(cpu_rate),
422 RINT(dram_rate), RFRAC(dram_rate),
423 RINT(sys_rate), RFRAC(sys_rate),
424 RINT(periph_rate), RFRAC(periph_rate));
429 ralink_clk_add("cpu", cpu_rate);
430 ralink_clk_add("10000100.timer", periph_rate);
431 ralink_clk_add("10000120.watchdog", periph_rate);
432 ralink_clk_add("10000b00.spi", sys_rate);
433 ralink_clk_add("10000c00.uartlite", periph_rate);
434 ralink_clk_add("10180000.wmac", xtal_rate);
437 void __init ralink_of_remap(void)
439 rt_sysc_membase = plat_of_remap_node("ralink,mt7620a-sysc");
440 rt_memc_membase = plat_of_remap_node("ralink,mt7620a-memc");
442 if (!rt_sysc_membase || !rt_memc_membase)
443 panic("Failed to remap core resources");
447 mt7620_dram_init(struct ralink_soc_info *soc_info)
450 case SYSCFG0_DRAM_TYPE_SDRAM:
451 pr_info("Board has SDRAM\n");
452 soc_info->mem_size_min = MT7620_SDRAM_SIZE_MIN;
453 soc_info->mem_size_max = MT7620_SDRAM_SIZE_MAX;
456 case SYSCFG0_DRAM_TYPE_DDR1:
457 pr_info("Board has DDR1\n");
458 soc_info->mem_size_min = MT7620_DDR1_SIZE_MIN;
459 soc_info->mem_size_max = MT7620_DDR1_SIZE_MAX;
462 case SYSCFG0_DRAM_TYPE_DDR2:
463 pr_info("Board has DDR2\n");
464 soc_info->mem_size_min = MT7620_DDR2_SIZE_MIN;
465 soc_info->mem_size_max = MT7620_DDR2_SIZE_MAX;
473 mt7628_dram_init(struct ralink_soc_info *soc_info)
476 case SYSCFG0_DRAM_TYPE_DDR1_MT7628:
477 pr_info("Board has DDR1\n");
478 soc_info->mem_size_min = MT7620_DDR1_SIZE_MIN;
479 soc_info->mem_size_max = MT7620_DDR1_SIZE_MAX;
482 case SYSCFG0_DRAM_TYPE_DDR2_MT7628:
483 pr_info("Board has DDR2\n");
484 soc_info->mem_size_min = MT7620_DDR2_SIZE_MIN;
485 soc_info->mem_size_max = MT7620_DDR2_SIZE_MAX;
492 void prom_soc_init(struct ralink_soc_info *soc_info)
494 void __iomem *sysc = (void __iomem *) KSEG1ADDR(MT7620_SYSC_BASE);
495 unsigned char *name = NULL;
504 n0 = __raw_readl(sysc + SYSC_REG_CHIP_NAME0);
505 n1 = __raw_readl(sysc + SYSC_REG_CHIP_NAME1);
506 rev = __raw_readl(sysc + SYSC_REG_CHIP_REV);
507 bga = (rev >> CHIP_REV_PKG_SHIFT) & CHIP_REV_PKG_MASK;
509 if (n0 == MT7620_CHIP_NAME0 && n1 == MT7620_CHIP_NAME1) {
511 ralink_soc = MT762X_SOC_MT7620A;
513 soc_info->compatible = "ralink,mt7620a-soc";
515 ralink_soc = MT762X_SOC_MT7620N;
517 soc_info->compatible = "ralink,mt7620n-soc";
519 panic("mt7620n is only supported for non pci kernels");
522 } else if (n0 == MT7620_CHIP_NAME0 && n1 == MT7628_CHIP_NAME1) {
523 u32 efuse = __raw_readl(sysc + SYSC_REG_EFUSE_CFG);
525 if (efuse & EFUSE_MT7688) {
526 ralink_soc = MT762X_SOC_MT7688;
529 ralink_soc = MT762X_SOC_MT7628AN;
532 soc_info->compatible = "ralink,mt7628an-soc";
534 panic("mt762x: unknown SoC, n0:%08x n1:%08x\n", n0, n1);
537 snprintf(soc_info->sys_type, RAMIPS_SYS_TYPE_LEN,
538 "Ralink %s ver:%u eco:%u",
540 (rev >> CHIP_REV_VER_SHIFT) & CHIP_REV_VER_MASK,
541 (rev & CHIP_REV_ECO_MASK));
543 cfg0 = __raw_readl(sysc + SYSC_REG_SYSTEM_CONFIG0);
545 dram_type = cfg0 & DRAM_TYPE_MT7628_MASK;
547 dram_type = (cfg0 >> SYSCFG0_DRAM_TYPE_SHIFT) &
548 SYSCFG0_DRAM_TYPE_MASK;
550 soc_info->mem_base = MT7620_DRAM_BASE;
552 mt7628_dram_init(soc_info);
554 mt7620_dram_init(soc_info);
556 pmu0 = __raw_readl(sysc + PMU0_CFG);
557 pmu1 = __raw_readl(sysc + PMU1_CFG);
559 pr_info("Analog PMU set to %s control\n",
560 (pmu0 & PMU_SW_SET) ? ("sw") : ("hw"));
561 pr_info("Digital PMU set to %s control\n",
562 (pmu1 & DIG_SW_SEL) ? ("sw") : ("hw"));
565 rt2880_pinmux_data = mt7628an_pinmux_data;
567 rt2880_pinmux_data = mt7620a_pinmux_data;