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)
40 /* is this a MT7620 or a MT7628 */
41 enum mt762x_soc_type mt762x_soc;
44 #define EFUSE_MT7688 0x100000
47 #define DRAM_TYPE_MT7628_MASK 0x1
49 /* does the board have sdram or ddram */
52 static struct rt2880_pmx_func i2c_grp[] = { FUNC("i2c", 0, 1, 2) };
53 static struct rt2880_pmx_func spi_grp[] = { FUNC("spi", 0, 3, 4) };
54 static struct rt2880_pmx_func uartlite_grp[] = { FUNC("uartlite", 0, 15, 2) };
55 static struct rt2880_pmx_func mdio_grp[] = { FUNC("mdio", 0, 22, 2) };
56 static struct rt2880_pmx_func rgmii1_grp[] = { FUNC("rgmii1", 0, 24, 12) };
57 static struct rt2880_pmx_func refclk_grp[] = { FUNC("spi refclk", 0, 37, 3) };
58 static struct rt2880_pmx_func ephy_grp[] = { FUNC("ephy", 0, 40, 5) };
59 static struct rt2880_pmx_func rgmii2_grp[] = { FUNC("rgmii2", 0, 60, 12) };
60 static struct rt2880_pmx_func wled_grp[] = { FUNC("wled", 0, 72, 1) };
61 static struct rt2880_pmx_func pa_grp[] = { FUNC("pa", 0, 18, 4) };
62 static struct rt2880_pmx_func uartf_grp[] = {
63 FUNC("uartf", MT7620_GPIO_MODE_UARTF, 7, 8),
64 FUNC("pcm uartf", MT7620_GPIO_MODE_PCM_UARTF, 7, 8),
65 FUNC("pcm i2s", MT7620_GPIO_MODE_PCM_I2S, 7, 8),
66 FUNC("i2s uartf", MT7620_GPIO_MODE_I2S_UARTF, 7, 8),
67 FUNC("pcm gpio", MT7620_GPIO_MODE_PCM_GPIO, 11, 4),
68 FUNC("gpio uartf", MT7620_GPIO_MODE_GPIO_UARTF, 7, 4),
69 FUNC("gpio i2s", MT7620_GPIO_MODE_GPIO_I2S, 7, 4),
71 static struct rt2880_pmx_func wdt_grp[] = {
72 FUNC("wdt rst", 0, 17, 1),
73 FUNC("wdt refclk", 0, 17, 1),
75 static struct rt2880_pmx_func pcie_rst_grp[] = {
76 FUNC("pcie rst", MT7620_GPIO_MODE_PCIE_RST, 36, 1),
77 FUNC("pcie refclk", MT7620_GPIO_MODE_PCIE_REF, 36, 1)
79 static struct rt2880_pmx_func nd_sd_grp[] = {
80 FUNC("nand", MT7620_GPIO_MODE_NAND, 45, 15),
81 FUNC("sd", MT7620_GPIO_MODE_SD, 45, 15)
84 static struct rt2880_pmx_group mt7620a_pinmux_data[] = {
85 GRP("i2c", i2c_grp, 1, MT7620_GPIO_MODE_I2C),
86 GRP("uartf", uartf_grp, MT7620_GPIO_MODE_UART0_MASK,
87 MT7620_GPIO_MODE_UART0_SHIFT),
88 GRP("spi", spi_grp, 1, MT7620_GPIO_MODE_SPI),
89 GRP("uartlite", uartlite_grp, 1, MT7620_GPIO_MODE_UART1),
90 GRP_G("wdt", wdt_grp, MT7620_GPIO_MODE_WDT_MASK,
91 MT7620_GPIO_MODE_WDT_GPIO, MT7620_GPIO_MODE_WDT_SHIFT),
92 GRP("mdio", mdio_grp, 1, MT7620_GPIO_MODE_MDIO),
93 GRP("rgmii1", rgmii1_grp, 1, MT7620_GPIO_MODE_RGMII1),
94 GRP("spi refclk", refclk_grp, 1, MT7620_GPIO_MODE_SPI_REF_CLK),
95 GRP_G("pcie", pcie_rst_grp, MT7620_GPIO_MODE_PCIE_MASK,
96 MT7620_GPIO_MODE_PCIE_GPIO, MT7620_GPIO_MODE_PCIE_SHIFT),
97 GRP_G("nd_sd", nd_sd_grp, MT7620_GPIO_MODE_ND_SD_MASK,
98 MT7620_GPIO_MODE_ND_SD_GPIO, MT7620_GPIO_MODE_ND_SD_SHIFT),
99 GRP("rgmii2", rgmii2_grp, 1, MT7620_GPIO_MODE_RGMII2),
100 GRP("wled", wled_grp, 1, MT7620_GPIO_MODE_WLED),
101 GRP("ephy", ephy_grp, 1, MT7620_GPIO_MODE_EPHY),
102 GRP("pa", pa_grp, 1, MT7620_GPIO_MODE_PA),
106 static struct rt2880_pmx_func pwm1_grp_mt7628[] = {
107 FUNC("sdcx", 3, 19, 1),
108 FUNC("utif", 2, 19, 1),
109 FUNC("gpio", 1, 19, 1),
110 FUNC("pwm", 0, 19, 1),
113 static struct rt2880_pmx_func pwm0_grp_mt7628[] = {
114 FUNC("sdcx", 3, 18, 1),
115 FUNC("utif", 2, 18, 1),
116 FUNC("gpio", 1, 18, 1),
117 FUNC("pwm", 0, 18, 1),
120 static struct rt2880_pmx_func uart2_grp_mt7628[] = {
121 FUNC("sdcx", 3, 20, 2),
122 FUNC("pwm", 2, 20, 2),
123 FUNC("gpio", 1, 20, 2),
124 FUNC("uart", 0, 20, 2),
127 static struct rt2880_pmx_func uart1_grp_mt7628[] = {
128 FUNC("sdcx", 3, 45, 2),
129 FUNC("pwm", 2, 45, 2),
130 FUNC("gpio", 1, 45, 2),
131 FUNC("uart", 0, 45, 2),
134 static struct rt2880_pmx_func i2c_grp_mt7628[] = {
136 FUNC("debug", 2, 4, 2),
137 FUNC("gpio", 1, 4, 2),
138 FUNC("i2c", 0, 4, 2),
141 static struct rt2880_pmx_func refclk_grp_mt7628[] = { FUNC("reclk", 0, 36, 1) };
142 static struct rt2880_pmx_func perst_grp_mt7628[] = { FUNC("perst", 0, 37, 1) };
143 static struct rt2880_pmx_func wdt_grp_mt7628[] = { FUNC("wdt", 0, 15, 38) };
144 static struct rt2880_pmx_func spi_grp_mt7628[] = { FUNC("spi", 0, 7, 4) };
146 static struct rt2880_pmx_func sd_mode_grp_mt7628[] = {
147 FUNC("jtag", 3, 22, 8),
148 FUNC("utif", 2, 22, 8),
149 FUNC("gpio", 1, 22, 8),
150 FUNC("sdcx", 0, 22, 8),
153 static struct rt2880_pmx_func uart0_grp_mt7628[] = {
156 FUNC("gpio", 1, 12, 2),
157 FUNC("uart", 0, 12, 2),
160 static struct rt2880_pmx_func i2s_grp_mt7628[] = {
161 FUNC("antenna", 3, 0, 4),
162 FUNC("pcm", 2, 0, 4),
163 FUNC("gpio", 1, 0, 4),
164 FUNC("i2s", 0, 0, 4),
167 static struct rt2880_pmx_func spi_cs1_grp_mt7628[] = {
169 FUNC("refclk", 2, 6, 1),
170 FUNC("gpio", 1, 6, 1),
171 FUNC("spi", 0, 6, 1),
174 static struct rt2880_pmx_func spis_grp_mt7628[] = {
175 FUNC("pwm", 3, 14, 4),
176 FUNC("util", 2, 14, 4),
177 FUNC("gpio", 1, 14, 4),
178 FUNC("spis", 0, 14, 4),
181 static struct rt2880_pmx_func gpio_grp_mt7628[] = {
182 FUNC("pcie", 3, 11, 1),
183 FUNC("refclk", 2, 11, 1),
184 FUNC("gpio", 1, 11, 1),
185 FUNC("gpio", 0, 11, 1),
188 #define MT7628_GPIO_MODE_MASK 0x3
190 #define MT7628_GPIO_MODE_PWM1 30
191 #define MT7628_GPIO_MODE_PWM0 28
192 #define MT7628_GPIO_MODE_UART2 26
193 #define MT7628_GPIO_MODE_UART1 24
194 #define MT7628_GPIO_MODE_I2C 20
195 #define MT7628_GPIO_MODE_REFCLK 18
196 #define MT7628_GPIO_MODE_PERST 16
197 #define MT7628_GPIO_MODE_WDT 14
198 #define MT7628_GPIO_MODE_SPI 12
199 #define MT7628_GPIO_MODE_SDMODE 10
200 #define MT7628_GPIO_MODE_UART0 8
201 #define MT7628_GPIO_MODE_I2S 6
202 #define MT7628_GPIO_MODE_CS1 4
203 #define MT7628_GPIO_MODE_SPIS 2
204 #define MT7628_GPIO_MODE_GPIO 0
206 static struct rt2880_pmx_group mt7628an_pinmux_data[] = {
207 GRP_G("pmw1", pwm1_grp_mt7628, MT7628_GPIO_MODE_MASK,
208 1, MT7628_GPIO_MODE_PWM1),
209 GRP_G("pmw1", pwm0_grp_mt7628, MT7628_GPIO_MODE_MASK,
210 1, MT7628_GPIO_MODE_PWM0),
211 GRP_G("uart2", uart2_grp_mt7628, MT7628_GPIO_MODE_MASK,
212 1, MT7628_GPIO_MODE_UART2),
213 GRP_G("uart1", uart1_grp_mt7628, MT7628_GPIO_MODE_MASK,
214 1, MT7628_GPIO_MODE_UART1),
215 GRP_G("i2c", i2c_grp_mt7628, MT7628_GPIO_MODE_MASK,
216 1, MT7628_GPIO_MODE_I2C),
217 GRP("refclk", refclk_grp_mt7628, 1, MT7628_GPIO_MODE_REFCLK),
218 GRP("perst", perst_grp_mt7628, 1, MT7628_GPIO_MODE_PERST),
219 GRP("wdt", wdt_grp_mt7628, 1, MT7628_GPIO_MODE_WDT),
220 GRP("spi", spi_grp_mt7628, 1, MT7628_GPIO_MODE_SPI),
221 GRP_G("sdmode", sd_mode_grp_mt7628, MT7628_GPIO_MODE_MASK,
222 1, MT7628_GPIO_MODE_SDMODE),
223 GRP_G("uart0", uart0_grp_mt7628, MT7628_GPIO_MODE_MASK,
224 1, MT7628_GPIO_MODE_UART0),
225 GRP_G("i2s", i2s_grp_mt7628, MT7628_GPIO_MODE_MASK,
226 1, MT7628_GPIO_MODE_I2S),
227 GRP_G("spi cs1", spi_cs1_grp_mt7628, MT7628_GPIO_MODE_MASK,
228 1, MT7628_GPIO_MODE_CS1),
229 GRP_G("spis", spis_grp_mt7628, MT7628_GPIO_MODE_MASK,
230 1, MT7628_GPIO_MODE_SPIS),
231 GRP_G("gpio", gpio_grp_mt7628, MT7628_GPIO_MODE_MASK,
232 1, MT7628_GPIO_MODE_GPIO),
236 static inline int is_mt76x8(void)
238 return mt762x_soc == MT762X_SOC_MT7628AN ||
239 mt762x_soc == MT762X_SOC_MT7688;
243 mt7620_calc_rate(u32 ref_rate, u32 mul, u32 div)
254 #define MHZ(x) ((x) * 1000 * 1000)
256 static __init unsigned long
257 mt7620_get_xtal_rate(void)
261 reg = rt_sysc_r32(SYSC_REG_SYSTEM_CONFIG0);
262 if (reg & SYSCFG0_XTAL_FREQ_SEL)
268 static __init unsigned long
269 mt7620_get_periph_rate(unsigned long xtal_rate)
273 reg = rt_sysc_r32(SYSC_REG_CLKCFG0);
274 if (reg & CLKCFG0_PERI_CLK_SEL)
280 static const u32 mt7620_clk_divider[] __initconst = { 2, 3, 4, 8 };
282 static __init unsigned long
283 mt7620_get_cpu_pll_rate(unsigned long xtal_rate)
289 reg = rt_sysc_r32(SYSC_REG_CPLL_CONFIG0);
290 if (reg & CPLL_CFG0_BYPASS_REF_CLK)
293 if ((reg & CPLL_CFG0_SW_CFG) == 0)
296 mul = (reg >> CPLL_CFG0_PLL_MULT_RATIO_SHIFT) &
297 CPLL_CFG0_PLL_MULT_RATIO_MASK;
299 if (reg & CPLL_CFG0_LC_CURFCK)
302 div = (reg >> CPLL_CFG0_PLL_DIV_RATIO_SHIFT) &
303 CPLL_CFG0_PLL_DIV_RATIO_MASK;
305 WARN_ON(div >= ARRAY_SIZE(mt7620_clk_divider));
307 return mt7620_calc_rate(xtal_rate, mul, mt7620_clk_divider[div]);
310 static __init unsigned long
311 mt7620_get_pll_rate(unsigned long xtal_rate, unsigned long cpu_pll_rate)
315 reg = rt_sysc_r32(SYSC_REG_CPLL_CONFIG1);
316 if (reg & CPLL_CFG1_CPU_AUX1)
319 if (reg & CPLL_CFG1_CPU_AUX0)
325 static __init unsigned long
326 mt7620_get_cpu_rate(unsigned long pll_rate)
332 reg = rt_sysc_r32(SYSC_REG_CPU_SYS_CLKCFG);
334 mul = reg & CPU_SYS_CLKCFG_CPU_FFRAC_MASK;
335 div = (reg >> CPU_SYS_CLKCFG_CPU_FDIV_SHIFT) &
336 CPU_SYS_CLKCFG_CPU_FDIV_MASK;
338 return mt7620_calc_rate(pll_rate, mul, div);
341 static const u32 mt7620_ocp_dividers[16] __initconst = {
342 [CPU_SYS_CLKCFG_OCP_RATIO_2] = 2,
343 [CPU_SYS_CLKCFG_OCP_RATIO_3] = 3,
344 [CPU_SYS_CLKCFG_OCP_RATIO_4] = 4,
345 [CPU_SYS_CLKCFG_OCP_RATIO_5] = 5,
346 [CPU_SYS_CLKCFG_OCP_RATIO_10] = 10,
349 static __init unsigned long
350 mt7620_get_dram_rate(unsigned long pll_rate)
352 if (dram_type == SYSCFG0_DRAM_TYPE_SDRAM)
358 static __init unsigned long
359 mt7620_get_sys_rate(unsigned long cpu_rate)
365 reg = rt_sysc_r32(SYSC_REG_CPU_SYS_CLKCFG);
367 ocp_ratio = (reg >> CPU_SYS_CLKCFG_OCP_RATIO_SHIFT) &
368 CPU_SYS_CLKCFG_OCP_RATIO_MASK;
370 if (WARN_ON(ocp_ratio >= ARRAY_SIZE(mt7620_ocp_dividers)))
373 div = mt7620_ocp_dividers[ocp_ratio];
374 if (WARN(!div, "invalid divider for OCP ratio %u", ocp_ratio))
377 return cpu_rate / div;
380 void __init ralink_clk_init(void)
382 unsigned long xtal_rate;
383 unsigned long cpu_pll_rate;
384 unsigned long pll_rate;
385 unsigned long cpu_rate;
386 unsigned long sys_rate;
387 unsigned long dram_rate;
388 unsigned long periph_rate;
390 xtal_rate = mt7620_get_xtal_rate();
392 #define RFMT(label) label ":%lu.%03luMHz "
393 #define RINT(x) ((x) / 1000000)
394 #define RFRAC(x) (((x) / 1000) % 1000)
397 if (xtal_rate == MHZ(40))
401 dram_rate = sys_rate = cpu_rate / 3;
402 periph_rate = MHZ(40);
404 ralink_clk_add("10000d00.uartlite", periph_rate);
405 ralink_clk_add("10000e00.uartlite", periph_rate);
407 cpu_pll_rate = mt7620_get_cpu_pll_rate(xtal_rate);
408 pll_rate = mt7620_get_pll_rate(xtal_rate, cpu_pll_rate);
410 cpu_rate = mt7620_get_cpu_rate(pll_rate);
411 dram_rate = mt7620_get_dram_rate(pll_rate);
412 sys_rate = mt7620_get_sys_rate(cpu_rate);
413 periph_rate = mt7620_get_periph_rate(xtal_rate);
415 pr_debug(RFMT("XTAL") RFMT("CPU_PLL") RFMT("PLL"),
416 RINT(xtal_rate), RFRAC(xtal_rate),
417 RINT(cpu_pll_rate), RFRAC(cpu_pll_rate),
418 RINT(pll_rate), RFRAC(pll_rate));
420 ralink_clk_add("10000500.uart", periph_rate);
423 pr_debug(RFMT("CPU") RFMT("DRAM") RFMT("SYS") RFMT("PERIPH"),
424 RINT(cpu_rate), RFRAC(cpu_rate),
425 RINT(dram_rate), RFRAC(dram_rate),
426 RINT(sys_rate), RFRAC(sys_rate),
427 RINT(periph_rate), RFRAC(periph_rate));
432 ralink_clk_add("cpu", cpu_rate);
433 ralink_clk_add("10000100.timer", periph_rate);
434 ralink_clk_add("10000120.watchdog", periph_rate);
435 ralink_clk_add("10000b00.spi", sys_rate);
436 ralink_clk_add("10000c00.uartlite", periph_rate);
437 ralink_clk_add("10180000.wmac", xtal_rate);
440 void __init ralink_of_remap(void)
442 rt_sysc_membase = plat_of_remap_node("ralink,mt7620a-sysc");
443 rt_memc_membase = plat_of_remap_node("ralink,mt7620a-memc");
445 if (!rt_sysc_membase || !rt_memc_membase)
446 panic("Failed to remap core resources");
450 mt7620_dram_init(struct ralink_soc_info *soc_info)
453 case SYSCFG0_DRAM_TYPE_SDRAM:
454 pr_info("Board has SDRAM\n");
455 soc_info->mem_size_min = MT7620_SDRAM_SIZE_MIN;
456 soc_info->mem_size_max = MT7620_SDRAM_SIZE_MAX;
459 case SYSCFG0_DRAM_TYPE_DDR1:
460 pr_info("Board has DDR1\n");
461 soc_info->mem_size_min = MT7620_DDR1_SIZE_MIN;
462 soc_info->mem_size_max = MT7620_DDR1_SIZE_MAX;
465 case SYSCFG0_DRAM_TYPE_DDR2:
466 pr_info("Board has DDR2\n");
467 soc_info->mem_size_min = MT7620_DDR2_SIZE_MIN;
468 soc_info->mem_size_max = MT7620_DDR2_SIZE_MAX;
476 mt7628_dram_init(struct ralink_soc_info *soc_info)
479 case SYSCFG0_DRAM_TYPE_DDR1_MT7628:
480 pr_info("Board has DDR1\n");
481 soc_info->mem_size_min = MT7620_DDR1_SIZE_MIN;
482 soc_info->mem_size_max = MT7620_DDR1_SIZE_MAX;
485 case SYSCFG0_DRAM_TYPE_DDR2_MT7628:
486 pr_info("Board has DDR2\n");
487 soc_info->mem_size_min = MT7620_DDR2_SIZE_MIN;
488 soc_info->mem_size_max = MT7620_DDR2_SIZE_MAX;
495 void prom_soc_init(struct ralink_soc_info *soc_info)
497 void __iomem *sysc = (void __iomem *) KSEG1ADDR(MT7620_SYSC_BASE);
498 unsigned char *name = NULL;
507 n0 = __raw_readl(sysc + SYSC_REG_CHIP_NAME0);
508 n1 = __raw_readl(sysc + SYSC_REG_CHIP_NAME1);
509 rev = __raw_readl(sysc + SYSC_REG_CHIP_REV);
510 bga = (rev >> CHIP_REV_PKG_SHIFT) & CHIP_REV_PKG_MASK;
512 if (n0 == MT7620_CHIP_NAME0 && n1 == MT7620_CHIP_NAME1) {
514 mt762x_soc = MT762X_SOC_MT7620A;
516 soc_info->compatible = "ralink,mt7620a-soc";
518 mt762x_soc = MT762X_SOC_MT7620N;
520 soc_info->compatible = "ralink,mt7620n-soc";
522 panic("mt7620n is only supported for non pci kernels");
525 } else if (n0 == MT7620_CHIP_NAME0 && n1 == MT7628_CHIP_NAME1) {
526 u32 efuse = __raw_readl(sysc + SYSC_REG_EFUSE_CFG);
528 if (efuse & EFUSE_MT7688) {
529 mt762x_soc = MT762X_SOC_MT7688;
532 mt762x_soc = MT762X_SOC_MT7628AN;
535 soc_info->compatible = "ralink,mt7628an-soc";
537 panic("mt762x: unknown SoC, n0:%08x n1:%08x\n", n0, n1);
540 snprintf(soc_info->sys_type, RAMIPS_SYS_TYPE_LEN,
541 "Ralink %s ver:%u eco:%u",
543 (rev >> CHIP_REV_VER_SHIFT) & CHIP_REV_VER_MASK,
544 (rev & CHIP_REV_ECO_MASK));
546 cfg0 = __raw_readl(sysc + SYSC_REG_SYSTEM_CONFIG0);
548 dram_type = cfg0 & DRAM_TYPE_MT7628_MASK;
550 dram_type = (cfg0 >> SYSCFG0_DRAM_TYPE_SHIFT) &
551 SYSCFG0_DRAM_TYPE_MASK;
553 soc_info->mem_base = MT7620_DRAM_BASE;
555 mt7628_dram_init(soc_info);
557 mt7620_dram_init(soc_info);
559 pmu0 = __raw_readl(sysc + PMU0_CFG);
560 pmu1 = __raw_readl(sysc + PMU1_CFG);
562 pr_info("Analog PMU set to %s control\n",
563 (pmu0 & PMU_SW_SET) ? ("sw") : ("hw"));
564 pr_info("Digital PMU set to %s control\n",
565 (pmu1 & DIG_SW_SEL) ? ("sw") : ("hw"));
568 rt2880_pinmux_data = mt7628an_pinmux_data;
570 rt2880_pinmux_data = mt7620a_pinmux_data;