diff options
Diffstat (limited to 'drivers/media/pci/cobalt/cobalt-cpld.c')
| -rw-r--r-- | drivers/media/pci/cobalt/cobalt-cpld.c | 324 |
1 files changed, 324 insertions, 0 deletions
diff --git a/drivers/media/pci/cobalt/cobalt-cpld.c b/drivers/media/pci/cobalt/cobalt-cpld.c new file mode 100644 index 000000000..fad882459 --- /dev/null +++ b/drivers/media/pci/cobalt/cobalt-cpld.c @@ -0,0 +1,324 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Cobalt CPLD functions + * + * Copyright 2012-2015 Cisco Systems, Inc. and/or its affiliates. + * All rights reserved. + */ + +#include <linux/delay.h> + +#include "cobalt-cpld.h" + +#define ADRS(offset) (COBALT_BUS_CPLD_BASE + offset) + +static u16 cpld_read(struct cobalt *cobalt, u32 offset) +{ + return cobalt_bus_read32(cobalt->bar1, ADRS(offset)); +} + +static void cpld_write(struct cobalt *cobalt, u32 offset, u16 val) +{ + return cobalt_bus_write32(cobalt->bar1, ADRS(offset), val); +} + +static void cpld_info_ver3(struct cobalt *cobalt) +{ + u32 rd; + u32 tmp; + + cobalt_info("CPLD System control register (read/write)\n"); + cobalt_info("\t\tSystem control: 0x%04x (0x0f00)\n", + cpld_read(cobalt, 0)); + cobalt_info("CPLD Clock control register (read/write)\n"); + cobalt_info("\t\tClock control: 0x%04x (0x0000)\n", + cpld_read(cobalt, 0x04)); + cobalt_info("CPLD HSMA Clk Osc register (read/write) - Must set wr trigger to load default values\n"); + cobalt_info("\t\tRegister #7:\t0x%04x (0x0022)\n", + cpld_read(cobalt, 0x08)); + cobalt_info("\t\tRegister #8:\t0x%04x (0x0047)\n", + cpld_read(cobalt, 0x0c)); + cobalt_info("\t\tRegister #9:\t0x%04x (0x00fa)\n", + cpld_read(cobalt, 0x10)); + cobalt_info("\t\tRegister #10:\t0x%04x (0x0061)\n", + cpld_read(cobalt, 0x14)); + cobalt_info("\t\tRegister #11:\t0x%04x (0x001e)\n", + cpld_read(cobalt, 0x18)); + cobalt_info("\t\tRegister #12:\t0x%04x (0x0045)\n", + cpld_read(cobalt, 0x1c)); + cobalt_info("\t\tRegister #135:\t0x%04x\n", + cpld_read(cobalt, 0x20)); + cobalt_info("\t\tRegister #137:\t0x%04x\n", + cpld_read(cobalt, 0x24)); + cobalt_info("CPLD System status register (read only)\n"); + cobalt_info("\t\tSystem status: 0x%04x\n", + cpld_read(cobalt, 0x28)); + cobalt_info("CPLD MAXII info register (read only)\n"); + cobalt_info("\t\tBoard serial number: 0x%04x\n", + cpld_read(cobalt, 0x2c)); + cobalt_info("\t\tMAXII program revision: 0x%04x\n", + cpld_read(cobalt, 0x30)); + cobalt_info("CPLD temp and voltage ADT7411 registers (read only)\n"); + cobalt_info("\t\tBoard temperature: %u Celsius\n", + cpld_read(cobalt, 0x34) / 4); + cobalt_info("\t\tFPGA temperature: %u Celsius\n", + cpld_read(cobalt, 0x38) / 4); + rd = cpld_read(cobalt, 0x3c); + tmp = (rd * 33 * 1000) / (483 * 10); + cobalt_info("\t\tVDD 3V3: %u,%03uV\n", tmp / 1000, tmp % 1000); + rd = cpld_read(cobalt, 0x40); + tmp = (rd * 74 * 2197) / (27 * 1000); + cobalt_info("\t\tADC ch3 5V: %u,%03uV\n", tmp / 1000, tmp % 1000); + rd = cpld_read(cobalt, 0x44); + tmp = (rd * 74 * 2197) / (47 * 1000); + cobalt_info("\t\tADC ch4 3V: %u,%03uV\n", tmp / 1000, tmp % 1000); + rd = cpld_read(cobalt, 0x48); + tmp = (rd * 57 * 2197) / (47 * 1000); + cobalt_info("\t\tADC ch5 2V5: %u,%03uV\n", tmp / 1000, tmp % 1000); + rd = cpld_read(cobalt, 0x4c); + tmp = (rd * 2197) / 1000; + cobalt_info("\t\tADC ch6 1V8: %u,%03uV\n", tmp / 1000, tmp % 1000); + rd = cpld_read(cobalt, 0x50); + tmp = (rd * 2197) / 1000; + cobalt_info("\t\tADC ch7 1V5: %u,%03uV\n", tmp / 1000, tmp % 1000); + rd = cpld_read(cobalt, 0x54); + tmp = (rd * 2197) / 1000; + cobalt_info("\t\tADC ch8 0V9: %u,%03uV\n", tmp / 1000, tmp % 1000); +} + +void cobalt_cpld_status(struct cobalt *cobalt) +{ + u32 rev = cpld_read(cobalt, 0x30); + + switch (rev) { + case 3: + case 4: + case 5: + cpld_info_ver3(cobalt); + break; + default: + cobalt_info("CPLD revision %u is not supported!\n", rev); + break; + } +} + +#define DCO_MIN 4850000000ULL +#define DCO_MAX 5670000000ULL + +#define SI570_CLOCK_CTRL 0x04 +#define S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_WR_TRIGGER 0x200 +#define S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_RST_TRIGGER 0x100 +#define S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_FPGA_CTRL 0x80 +#define S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_EN 0x40 + +#define SI570_REG7 0x08 +#define SI570_REG8 0x0c +#define SI570_REG9 0x10 +#define SI570_REG10 0x14 +#define SI570_REG11 0x18 +#define SI570_REG12 0x1c +#define SI570_REG135 0x20 +#define SI570_REG137 0x24 + +struct multiplier { + unsigned mult, hsdiv, n1; +}; + +/* List all possible multipliers (= hsdiv * n1). There are lots of duplicates, + which are all removed in this list to keep the list as short as possible. + The values for hsdiv and n1 are the actual values, not the register values. + */ +static const struct multiplier multipliers[] = { + { 4, 4, 1 }, { 5, 5, 1 }, { 6, 6, 1 }, + { 7, 7, 1 }, { 8, 4, 2 }, { 9, 9, 1 }, + { 10, 5, 2 }, { 11, 11, 1 }, { 12, 6, 2 }, + { 14, 7, 2 }, { 16, 4, 4 }, { 18, 9, 2 }, + { 20, 5, 4 }, { 22, 11, 2 }, { 24, 4, 6 }, + { 28, 7, 4 }, { 30, 5, 6 }, { 32, 4, 8 }, + { 36, 6, 6 }, { 40, 4, 10 }, { 42, 7, 6 }, + { 44, 11, 4 }, { 48, 4, 12 }, { 50, 5, 10 }, + { 54, 9, 6 }, { 56, 4, 14 }, { 60, 5, 12 }, + { 64, 4, 16 }, { 66, 11, 6 }, { 70, 5, 14 }, + { 72, 4, 18 }, { 80, 4, 20 }, { 84, 6, 14 }, + { 88, 11, 8 }, { 90, 5, 18 }, { 96, 4, 24 }, + { 98, 7, 14 }, { 100, 5, 20 }, { 104, 4, 26 }, + { 108, 6, 18 }, { 110, 11, 10 }, { 112, 4, 28 }, + { 120, 4, 30 }, { 126, 7, 18 }, { 128, 4, 32 }, + { 130, 5, 26 }, { 132, 11, 12 }, { 136, 4, 34 }, + { 140, 5, 28 }, { 144, 4, 36 }, { 150, 5, 30 }, + { 152, 4, 38 }, { 154, 11, 14 }, { 156, 6, 26 }, + { 160, 4, 40 }, { 162, 9, 18 }, { 168, 4, 42 }, + { 170, 5, 34 }, { 176, 11, 16 }, { 180, 5, 36 }, + { 182, 7, 26 }, { 184, 4, 46 }, { 190, 5, 38 }, + { 192, 4, 48 }, { 196, 7, 28 }, { 198, 11, 18 }, + { 198, 9, 22 }, { 200, 4, 50 }, { 204, 6, 34 }, + { 208, 4, 52 }, { 210, 5, 42 }, { 216, 4, 54 }, + { 220, 11, 20 }, { 224, 4, 56 }, { 228, 6, 38 }, + { 230, 5, 46 }, { 232, 4, 58 }, { 234, 9, 26 }, + { 238, 7, 34 }, { 240, 4, 60 }, { 242, 11, 22 }, + { 248, 4, 62 }, { 250, 5, 50 }, { 252, 6, 42 }, + { 256, 4, 64 }, { 260, 5, 52 }, { 264, 11, 24 }, + { 266, 7, 38 }, { 270, 5, 54 }, { 272, 4, 68 }, + { 276, 6, 46 }, { 280, 4, 70 }, { 286, 11, 26 }, + { 288, 4, 72 }, { 290, 5, 58 }, { 294, 7, 42 }, + { 296, 4, 74 }, { 300, 5, 60 }, { 304, 4, 76 }, + { 306, 9, 34 }, { 308, 11, 28 }, { 310, 5, 62 }, + { 312, 4, 78 }, { 320, 4, 80 }, { 322, 7, 46 }, + { 324, 6, 54 }, { 328, 4, 82 }, { 330, 11, 30 }, + { 336, 4, 84 }, { 340, 5, 68 }, { 342, 9, 38 }, + { 344, 4, 86 }, { 348, 6, 58 }, { 350, 5, 70 }, + { 352, 11, 32 }, { 360, 4, 90 }, { 364, 7, 52 }, + { 368, 4, 92 }, { 370, 5, 74 }, { 372, 6, 62 }, + { 374, 11, 34 }, { 376, 4, 94 }, { 378, 7, 54 }, + { 380, 5, 76 }, { 384, 4, 96 }, { 390, 5, 78 }, + { 392, 4, 98 }, { 396, 11, 36 }, { 400, 4, 100 }, + { 406, 7, 58 }, { 408, 4, 102 }, { 410, 5, 82 }, + { 414, 9, 46 }, { 416, 4, 104 }, { 418, 11, 38 }, + { 420, 5, 84 }, { 424, 4, 106 }, { 430, 5, 86 }, + { 432, 4, 108 }, { 434, 7, 62 }, { 440, 11, 40 }, + { 444, 6, 74 }, { 448, 4, 112 }, { 450, 5, 90 }, + { 456, 4, 114 }, { 460, 5, 92 }, { 462, 11, 42 }, + { 464, 4, 116 }, { 468, 6, 78 }, { 470, 5, 94 }, + { 472, 4, 118 }, { 476, 7, 68 }, { 480, 4, 120 }, + { 484, 11, 44 }, { 486, 9, 54 }, { 488, 4, 122 }, + { 490, 5, 98 }, { 492, 6, 82 }, { 496, 4, 124 }, + { 500, 5, 100 }, { 504, 4, 126 }, { 506, 11, 46 }, + { 510, 5, 102 }, { 512, 4, 128 }, { 516, 6, 86 }, + { 518, 7, 74 }, { 520, 5, 104 }, { 522, 9, 58 }, + { 528, 11, 48 }, { 530, 5, 106 }, { 532, 7, 76 }, + { 540, 5, 108 }, { 546, 7, 78 }, { 550, 11, 50 }, + { 552, 6, 92 }, { 558, 9, 62 }, { 560, 5, 112 }, + { 564, 6, 94 }, { 570, 5, 114 }, { 572, 11, 52 }, + { 574, 7, 82 }, { 576, 6, 96 }, { 580, 5, 116 }, + { 588, 6, 98 }, { 590, 5, 118 }, { 594, 11, 54 }, + { 600, 5, 120 }, { 602, 7, 86 }, { 610, 5, 122 }, + { 612, 6, 102 }, { 616, 11, 56 }, { 620, 5, 124 }, + { 624, 6, 104 }, { 630, 5, 126 }, { 636, 6, 106 }, + { 638, 11, 58 }, { 640, 5, 128 }, { 644, 7, 92 }, + { 648, 6, 108 }, { 658, 7, 94 }, { 660, 11, 60 }, + { 666, 9, 74 }, { 672, 6, 112 }, { 682, 11, 62 }, + { 684, 6, 114 }, { 686, 7, 98 }, { 696, 6, 116 }, + { 700, 7, 100 }, { 702, 9, 78 }, { 704, 11, 64 }, + { 708, 6, 118 }, { 714, 7, 102 }, { 720, 6, 120 }, + { 726, 11, 66 }, { 728, 7, 104 }, { 732, 6, 122 }, + { 738, 9, 82 }, { 742, 7, 106 }, { 744, 6, 124 }, + { 748, 11, 68 }, { 756, 6, 126 }, { 768, 6, 128 }, + { 770, 11, 70 }, { 774, 9, 86 }, { 784, 7, 112 }, + { 792, 11, 72 }, { 798, 7, 114 }, { 810, 9, 90 }, + { 812, 7, 116 }, { 814, 11, 74 }, { 826, 7, 118 }, + { 828, 9, 92 }, { 836, 11, 76 }, { 840, 7, 120 }, + { 846, 9, 94 }, { 854, 7, 122 }, { 858, 11, 78 }, + { 864, 9, 96 }, { 868, 7, 124 }, { 880, 11, 80 }, + { 882, 7, 126 }, { 896, 7, 128 }, { 900, 9, 100 }, + { 902, 11, 82 }, { 918, 9, 102 }, { 924, 11, 84 }, + { 936, 9, 104 }, { 946, 11, 86 }, { 954, 9, 106 }, + { 968, 11, 88 }, { 972, 9, 108 }, { 990, 11, 90 }, + { 1008, 9, 112 }, { 1012, 11, 92 }, { 1026, 9, 114 }, + { 1034, 11, 94 }, { 1044, 9, 116 }, { 1056, 11, 96 }, + { 1062, 9, 118 }, { 1078, 11, 98 }, { 1080, 9, 120 }, + { 1098, 9, 122 }, { 1100, 11, 100 }, { 1116, 9, 124 }, + { 1122, 11, 102 }, { 1134, 9, 126 }, { 1144, 11, 104 }, + { 1152, 9, 128 }, { 1166, 11, 106 }, { 1188, 11, 108 }, + { 1210, 11, 110 }, { 1232, 11, 112 }, { 1254, 11, 114 }, + { 1276, 11, 116 }, { 1298, 11, 118 }, { 1320, 11, 120 }, + { 1342, 11, 122 }, { 1364, 11, 124 }, { 1386, 11, 126 }, + { 1408, 11, 128 }, +}; + +bool cobalt_cpld_set_freq(struct cobalt *cobalt, unsigned f_out) +{ + const unsigned f_xtal = 39170000; /* xtal for si598 */ + u64 dco; + u64 rfreq; + unsigned delta = 0xffffffff; + unsigned i_best = 0; + unsigned i; + u8 n1, hsdiv; + u8 regs[6]; + int found = 0; + int retries = 3; + + for (i = 0; i < ARRAY_SIZE(multipliers); i++) { + unsigned mult = multipliers[i].mult; + u32 d; + + dco = (u64)f_out * mult; + if (dco < DCO_MIN || dco > DCO_MAX) + continue; + div_u64_rem((dco << 28) + f_xtal / 2, f_xtal, &d); + if (d < delta) { + found = 1; + i_best = i; + delta = d; + } + } + if (!found) + return false; + dco = (u64)f_out * multipliers[i_best].mult; + n1 = multipliers[i_best].n1 - 1; + hsdiv = multipliers[i_best].hsdiv - 4; + rfreq = div_u64(dco << 28, f_xtal); + + cpld_read(cobalt, SI570_CLOCK_CTRL); + + regs[0] = (hsdiv << 5) | (n1 >> 2); + regs[1] = ((n1 & 0x3) << 6) | (rfreq >> 32); + regs[2] = (rfreq >> 24) & 0xff; + regs[3] = (rfreq >> 16) & 0xff; + regs[4] = (rfreq >> 8) & 0xff; + regs[5] = rfreq & 0xff; + + /* The sequence of clock_ctrl flags to set is very weird. It looks + like I have to reset it, then set the new frequency and reset it + again. It shouldn't be necessary to do a reset, but if I don't, + then a strange frequency is set (156.412034 MHz, or register values + 0x01, 0xc7, 0xfc, 0x7f, 0x53, 0x62). + */ + + cobalt_dbg(1, "%u: %6ph\n", f_out, regs); + + while (retries--) { + u8 read_regs[6]; + + cpld_write(cobalt, SI570_CLOCK_CTRL, + S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_EN | + S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_FPGA_CTRL); + usleep_range(10000, 15000); + cpld_write(cobalt, SI570_REG7, regs[0]); + cpld_write(cobalt, SI570_REG8, regs[1]); + cpld_write(cobalt, SI570_REG9, regs[2]); + cpld_write(cobalt, SI570_REG10, regs[3]); + cpld_write(cobalt, SI570_REG11, regs[4]); + cpld_write(cobalt, SI570_REG12, regs[5]); + cpld_write(cobalt, SI570_CLOCK_CTRL, + S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_EN | + S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_WR_TRIGGER); + usleep_range(10000, 15000); + cpld_write(cobalt, SI570_CLOCK_CTRL, + S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_EN | + S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_FPGA_CTRL); + usleep_range(10000, 15000); + read_regs[0] = cpld_read(cobalt, SI570_REG7); + read_regs[1] = cpld_read(cobalt, SI570_REG8); + read_regs[2] = cpld_read(cobalt, SI570_REG9); + read_regs[3] = cpld_read(cobalt, SI570_REG10); + read_regs[4] = cpld_read(cobalt, SI570_REG11); + read_regs[5] = cpld_read(cobalt, SI570_REG12); + cpld_write(cobalt, SI570_CLOCK_CTRL, + S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_EN | + S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_FPGA_CTRL | + S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_RST_TRIGGER); + usleep_range(10000, 15000); + cpld_write(cobalt, SI570_CLOCK_CTRL, + S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_EN); + usleep_range(10000, 15000); + + if (!memcmp(read_regs, regs, sizeof(read_regs))) + break; + cobalt_dbg(1, "retry: %6ph\n", read_regs); + } + if (2 - retries) + cobalt_info("Needed %d retries\n", 2 - retries); + + return true; +} |