diff options
Diffstat (limited to 'board/gdsys/common/osd.c')
| -rw-r--r-- | board/gdsys/common/osd.c | 55 |
1 files changed, 52 insertions, 3 deletions
diff --git a/board/gdsys/common/osd.c b/board/gdsys/common/osd.c index 4d8c046..6e4edae 100644 --- a/board/gdsys/common/osd.c +++ b/board/gdsys/common/osd.c @@ -30,7 +30,12 @@ #define CH7301_I2C_ADDR 0x75 #define ICS8N3QV01_I2C_ADDR 0x6E -#define ICS8N3QV01_FREF 114285 +#define ICS8N3QV01_FREF 114285000 +#define ICS8N3QV01_FREF_LL 114285000LL +#define ICS8N3QV01_F_DEFAULT_0 156250000LL +#define ICS8N3QV01_F_DEFAULT_1 125000000LL +#define ICS8N3QV01_F_DEFAULT_2 100000000LL +#define ICS8N3QV01_F_DEFAULT_3 25175000LL #define SIL1178_MASTER_I2C_ADDRESS 0x38 #define SIL1178_SLAVE_I2C_ADDRESS 0x39 @@ -150,6 +155,41 @@ static void mpc92469ac_set(unsigned screen, unsigned int fout) #endif #ifdef CONFIG_SYS_ICS8N3QV01 + +static unsigned int ics8n3qv01_get_fout_calc(unsigned screen, unsigned index) +{ + unsigned long long n; + unsigned long long mint; + unsigned long long mfrac; + u8 reg_a, reg_b, reg_c, reg_d, reg_f; + unsigned long long fout_calc; + + if (index > 3) + return 0; + + reg_a = fpga_iic_read(screen, ICS8N3QV01_I2C_ADDR, 0 + index); + reg_b = fpga_iic_read(screen, ICS8N3QV01_I2C_ADDR, 4 + index); + reg_c = fpga_iic_read(screen, ICS8N3QV01_I2C_ADDR, 8 + index); + reg_d = fpga_iic_read(screen, ICS8N3QV01_I2C_ADDR, 12 + index); + reg_f = fpga_iic_read(screen, ICS8N3QV01_I2C_ADDR, 20 + index); + + mint = ((reg_a >> 1) & 0x1f) | (reg_f & 0x20); + mfrac = ((reg_a & 0x01) << 17) | (reg_b << 9) | (reg_c << 1) + | (reg_d >> 7); + n = reg_d & 0x7f; + + fout_calc = (mint * ICS8N3QV01_FREF_LL + + mfrac * ICS8N3QV01_FREF_LL / 262144LL + + ICS8N3QV01_FREF_LL / 524288LL + + n / 2) + / n + * 1000000 + / (1000000 - 100); + + return fout_calc; +} + + static void ics8n3qv01_calc_parameters(unsigned int fout, unsigned int *_mint, unsigned int *_mfrac, unsigned int *_n) @@ -160,7 +200,7 @@ static void ics8n3qv01_calc_parameters(unsigned int fout, unsigned int mint; unsigned long long mfrac; - n = 2550000000U / fout; + n = (2215000000U + fout / 2) / fout; if ((n & 1) && (n > 5)) n -= 1; @@ -184,9 +224,18 @@ static void ics8n3qv01_set(unsigned screen, unsigned int fout) unsigned int n; unsigned int mint; unsigned int mfrac; + unsigned int fout_calc; + unsigned long long fout_prog; + long long off_ppm; u8 reg0, reg4, reg8, reg12, reg18, reg20; - ics8n3qv01_calc_parameters(fout, &mint, &mfrac, &n); + fout_calc = ics8n3qv01_get_fout_calc(screen, 1); + off_ppm = (fout_calc - ICS8N3QV01_F_DEFAULT_1) * 1000000 + / ICS8N3QV01_F_DEFAULT_1; + printf(" PLL is off by %lld ppm\n", off_ppm); + fout_prog = (unsigned long long)fout * (unsigned long long)fout_calc + / ICS8N3QV01_F_DEFAULT_1; + ics8n3qv01_calc_parameters(fout_prog, &mint, &mfrac, &n); reg0 = fpga_iic_read(screen, ICS8N3QV01_I2C_ADDR, 0) & 0xc0; reg0 |= (mint & 0x1f) << 1; |