94 lines
3.0 KiB
C
94 lines
3.0 KiB
C
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#ifndef CS2100_I2C_DEVICE_ADDR
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#define CS2100_I2C_DEVICE_ADDR (0x9c>>1)
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#endif
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#define CS2100_DEVICE_CONTROL (0x02)
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#define CS2100_DEVICE_CONFIG_1 (0x03)
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#define CS2100_GLOBAL_CONFIG (0x05)
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#define CS2100_RATIO_1 (0x06)
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#define CS2100_RATIO_2 (0x07)
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#define CS2100_RATIO_3 (0x08)
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#define CS2100_RATIO_4 (0x09)
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#define CS2100_FUNC_CONFIG_1 (0x16)
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#define CS2100_FUNC_CONFIG_2 (0x17)
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/* TODO this is a key frequency and should be moved into lib_xua */
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#if (XUA_SYNCMODE == XUA_SYNCMODE_SYNC)
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#define PLL_SYNC_FREQ (500)
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#else
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#if (XUA_SPDIF_RX_EN || XUA_ADAT_RX_EN)
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/* Choose a frequency the xcore can easily generate internally */
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#define PLL_SYNC_FREQ (300)
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#else
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#define PLL_SYNC_FREQ (1000000)
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#endif
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#endif
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#ifndef CS2100_REGREAD
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#define CS2100_REGREAD(reg, data) {data[0] = i2c.read_reg(CS2100_I2C_DEVICE_ADDR, reg, result);}
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#endif
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#ifndef CS2100_REGREAD_ASSERT
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#define CS2100_REGREAD_ASSERT(reg, data, expected) {data[0] = i2c.read_reg(CS2100_I2C_DEVICE_ADDR, reg, result); assert(data[0] == expected);}
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#endif
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#ifndef CS2100_REGWRITE
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#define CS2100_REGWRITE(reg, val) {result = i2c.write_reg(CS2100_I2C_DEVICE_ADDR, reg, val);}
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#endif
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#ifndef UNSAFE
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#define UNSAFE
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#endif
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/* Init of CS2100 */
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void PllInit(UNSAFE client interface i2c_master_if i2c)
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{
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UNSAFE
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{
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unsigned char data[1] = {0};
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i2c_regop_res_t result;
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/* Enable init */
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CS2100_REGWRITE(CS2100_DEVICE_CONFIG_1, 0x07);
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CS2100_REGWRITE(CS2100_GLOBAL_CONFIG, 0x01);
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CS2100_REGWRITE(CS2100_FUNC_CONFIG_1, 0x08);
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CS2100_REGWRITE(CS2100_FUNC_CONFIG_2, 0x00); //0x10 for always gen clock even when unlocked
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/* Read back and check */
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CS2100_REGREAD_ASSERT(CS2100_DEVICE_CONFIG_1, data, 0x07);
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CS2100_REGREAD_ASSERT(CS2100_GLOBAL_CONFIG, data, 0x01);
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CS2100_REGREAD_ASSERT(CS2100_FUNC_CONFIG_1, data, 0x08);
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CS2100_REGREAD_ASSERT(CS2100_FUNC_CONFIG_2, data, 0x00);
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//i2c.shutdown();
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}
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}
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/* Setup PLL multiplier */
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void PllMult(unsigned output, unsigned ref, UNSAFE client interface i2c_master_if i2c)
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{
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UNSAFE
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{
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unsigned char data[1] = {0};
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i2c_regop_res_t result;
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/* PLL expects 12:20 format, convert output and ref to 12:20 */
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/* Shift up the dividend by 12 to retain format... */
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unsigned mult = (unsigned) ((((unsigned long long)output) << 32) / (((unsigned long long)ref) << 20));
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CS2100_REGWRITE(CS2100_RATIO_1, (mult >> 24) & 0xFF);
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CS2100_REGWRITE(CS2100_RATIO_2, (mult >> 16) & 0xFF);
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CS2100_REGWRITE(CS2100_RATIO_3, (mult >> 8) & 0xFF);
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CS2100_REGWRITE(CS2100_RATIO_4, (mult & 0xFF));
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/* Read back and check */
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CS2100_REGREAD_ASSERT(CS2100_RATIO_1, data, ((mult >> 24) & 0xFF));
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CS2100_REGREAD_ASSERT(CS2100_RATIO_2, data, ((mult >> 16) & 0xFF));
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CS2100_REGREAD_ASSERT(CS2100_RATIO_3, data, ((mult >> 8) & 0xFF));
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CS2100_REGREAD_ASSERT(CS2100_RATIO_4, data, (mult & 0xFF));
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}
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}
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