patch-2.4.8 linux/drivers/video/aty/mach64_gx.c
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- Lines: 887
- Date:
Tue Jul 31 14:43:29 2001
- Orig file:
v2.4.7/linux/drivers/video/aty/mach64_gx.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.4.7/linux/drivers/video/aty/mach64_gx.c linux/drivers/video/aty/mach64_gx.c
@@ -0,0 +1,886 @@
+
+/*
+ * ATI Mach64 GX Support
+ */
+
+#include <linux/delay.h>
+#include <linux/fb.h>
+
+#include <asm/io.h>
+
+#include <video/fbcon.h>
+
+#include "mach64.h"
+#include "atyfb.h"
+
+/* Definitions for the ICS 2595 == ATI 18818_1 Clockchip */
+
+#define REF_FREQ_2595 1432 /* 14.33 MHz (exact 14.31818) */
+#define REF_DIV_2595 46 /* really 43 on ICS 2595 !!! */
+ /* ohne Prescaler */
+#define MAX_FREQ_2595 15938 /* 159.38 MHz (really 170.486) */
+#define MIN_FREQ_2595 8000 /* 80.00 MHz ( 85.565) */
+ /* mit Prescaler 2, 4, 8 */
+#define ABS_MIN_FREQ_2595 1000 /* 10.00 MHz (really 10.697) */
+#define N_ADJ_2595 257
+
+#define STOP_BITS_2595 0x1800
+
+
+#define MIN_N_408 2
+
+#define MIN_N_1703 6
+
+#define MIN_M 2
+#define MAX_M 30
+#define MIN_N 35
+#define MAX_N 255-8
+
+
+ /*
+ * Support Functions
+ */
+
+static void aty_dac_waste4(const struct fb_info_aty *info)
+{
+ (void)aty_ld_8(DAC_REGS, info);
+
+ (void)aty_ld_8(DAC_REGS + 2, info);
+ (void)aty_ld_8(DAC_REGS + 2, info);
+ (void)aty_ld_8(DAC_REGS + 2, info);
+ (void)aty_ld_8(DAC_REGS + 2, info);
+}
+
+static void aty_StrobeClock(const struct fb_info_aty *info)
+{
+ u8 tmp;
+
+ udelay(26);
+
+ tmp = aty_ld_8(CLOCK_CNTL, info);
+ aty_st_8(CLOCK_CNTL + info->clk_wr_offset, tmp | CLOCK_STROBE, info);
+
+ return;
+}
+
+
+ /*
+ * IBM RGB514 DAC and Clock Chip
+ */
+
+static void aty_st_514(int offset, u8 val, const struct fb_info_aty *info)
+{
+ aty_st_8(DAC_CNTL, 1, info);
+ /* right addr byte */
+ aty_st_8(DAC_W_INDEX, offset & 0xff, info);
+ /* left addr byte */
+ aty_st_8(DAC_DATA, (offset >> 8) & 0xff, info);
+ aty_st_8(DAC_MASK, val, info);
+ aty_st_8(DAC_CNTL, 0, info);
+}
+
+static int aty_set_dac_514(const struct fb_info_aty *info,
+ const union aty_pll *pll, u32 bpp, u32 accel)
+{
+ static struct {
+ u8 pixel_dly;
+ u8 misc2_cntl;
+ u8 pixel_rep;
+ u8 pixel_cntl_index;
+ u8 pixel_cntl_v1;
+ } tab[3] = {
+ { 0, 0x41, 0x03, 0x71, 0x45 }, /* 8 bpp */
+ { 0, 0x45, 0x04, 0x0c, 0x01 }, /* 555 */
+ { 0, 0x45, 0x06, 0x0e, 0x00 }, /* XRGB */
+ };
+ int i;
+
+ switch (bpp) {
+ case 8:
+ default:
+ i = 0;
+ break;
+ case 16:
+ i = 1;
+ break;
+ case 32:
+ i = 2;
+ break;
+ }
+ aty_st_514(0x90, 0x00, info); /* VRAM Mask Low */
+ aty_st_514(0x04, tab[i].pixel_dly, info); /* Horizontal Sync Control */
+ aty_st_514(0x05, 0x00, info); /* Power Management */
+ aty_st_514(0x02, 0x01, info); /* Misc Clock Control */
+ aty_st_514(0x71, tab[i].misc2_cntl, info); /* Misc Control 2 */
+ aty_st_514(0x0a, tab[i].pixel_rep, info); /* Pixel Format */
+ aty_st_514(tab[i].pixel_cntl_index, tab[i].pixel_cntl_v1, info);
+ /* Misc Control 2 / 16 BPP Control / 32 BPP Control */
+ return 0;
+}
+
+static int aty_var_to_pll_514(const struct fb_info_aty *info, u32 vclk_per,
+ u8 bpp, union aty_pll *pll)
+{
+ /*
+ * FIXME: use real calculations instead of using fixed values from the old
+ * driver
+ */
+ static struct {
+ u32 limit; /* pixlock rounding limit (arbitrary) */
+ u8 m; /* (df<<6) | vco_div_count */
+ u8 n; /* ref_div_count */
+ } RGB514_clocks[7] = {
+ { 8000, (3<<6) | 20, 9 }, /* 7395 ps / 135.2273 MHz */
+ { 10000, (1<<6) | 19, 3 }, /* 9977 ps / 100.2273 MHz */
+ { 13000, (1<<6) | 2, 3 }, /* 12509 ps / 79.9432 MHz */
+ { 14000, (2<<6) | 8, 7 }, /* 13394 ps / 74.6591 MHz */
+ { 16000, (1<<6) | 44, 6 }, /* 15378 ps / 65.0284 MHz */
+ { 25000, (1<<6) | 15, 5 }, /* 17460 ps / 57.2727 MHz */
+ { 50000, (0<<6) | 53, 7 }, /* 33145 ps / 30.1705 MHz */
+ };
+ int i;
+
+ for (i = 0; i < sizeof(RGB514_clocks)/sizeof(*RGB514_clocks); i++)
+ if (vclk_per <= RGB514_clocks[i].limit) {
+ pll->ibm514.m = RGB514_clocks[i].m;
+ pll->ibm514.n = RGB514_clocks[i].n;
+ return 0;
+ }
+ return -EINVAL;
+}
+
+static u32 aty_pll_514_to_var(const struct fb_info_aty *info,
+ const union aty_pll *pll)
+{
+ u8 df, vco_div_count, ref_div_count;
+
+ df = pll->ibm514.m >> 6;
+ vco_div_count = pll->ibm514.m & 0x3f;
+ ref_div_count = pll->ibm514.n;
+
+ return ((info->ref_clk_per*ref_div_count)<<(3-df))/(vco_div_count+65);
+}
+
+static void aty_set_pll_514(const struct fb_info_aty *info,
+ const union aty_pll *pll)
+{
+ aty_st_514(0x06, 0x02, info); /* DAC Operation */
+ aty_st_514(0x10, 0x01, info); /* PLL Control 1 */
+ aty_st_514(0x70, 0x01, info); /* Misc Control 1 */
+ aty_st_514(0x8f, 0x1f, info); /* PLL Ref. Divider Input */
+ aty_st_514(0x03, 0x00, info); /* Sync Control */
+ aty_st_514(0x05, 0x00, info); /* Power Management */
+ aty_st_514(0x20, pll->ibm514.m, info); /* F0 / M0 */
+ aty_st_514(0x21, pll->ibm514.n, info); /* F1 / N0 */
+}
+
+const struct aty_dac_ops aty_dac_ibm514 = {
+ set_dac: aty_set_dac_514,
+};
+
+const struct aty_pll_ops aty_pll_ibm514 = {
+ var_to_pll: aty_var_to_pll_514,
+ pll_to_var: aty_pll_514_to_var,
+ set_pll: aty_set_pll_514,
+};
+
+
+ /*
+ * ATI 68860-B DAC
+ */
+
+static int aty_set_dac_ATI68860_B(const struct fb_info_aty *info,
+ const union aty_pll *pll, u32 bpp, u32 accel)
+{
+ u32 gModeReg, devSetupRegA, temp, mask;
+
+ gModeReg = 0;
+ devSetupRegA = 0;
+
+ switch (bpp) {
+ case 8:
+ gModeReg = 0x83;
+ devSetupRegA = 0x60 | 0x00 /*(info->mach64DAC8Bit ? 0x00 : 0x01) */;
+ break;
+ case 15:
+ gModeReg = 0xA0;
+ devSetupRegA = 0x60;
+ break;
+ case 16:
+ gModeReg = 0xA1;
+ devSetupRegA = 0x60;
+ break;
+ case 24:
+ gModeReg = 0xC0;
+ devSetupRegA = 0x60;
+ break;
+ case 32:
+ gModeReg = 0xE3;
+ devSetupRegA = 0x60;
+ break;
+ }
+
+ if (!accel) {
+ gModeReg = 0x80;
+ devSetupRegA = 0x61;
+ }
+
+ temp = aty_ld_8(DAC_CNTL, info);
+ aty_st_8(DAC_CNTL, (temp & ~DAC_EXT_SEL_RS2) | DAC_EXT_SEL_RS3, info);
+
+ aty_st_8(DAC_REGS + 2, 0x1D, info);
+ aty_st_8(DAC_REGS + 3, gModeReg, info);
+ aty_st_8(DAC_REGS, 0x02, info);
+
+ temp = aty_ld_8(DAC_CNTL, info);
+ aty_st_8(DAC_CNTL, temp | DAC_EXT_SEL_RS2 | DAC_EXT_SEL_RS3, info);
+
+ if (info->total_vram < MEM_SIZE_1M)
+ mask = 0x04;
+ else if (info->total_vram == MEM_SIZE_1M)
+ mask = 0x08;
+ else
+ mask = 0x0C;
+
+ /* The following assumes that the BIOS has correctly set R7 of the
+ * Device Setup Register A at boot time.
+ */
+#define A860_DELAY_L 0x80
+
+ temp = aty_ld_8(DAC_REGS, info);
+ aty_st_8(DAC_REGS, (devSetupRegA | mask) | (temp & A860_DELAY_L), info);
+ temp = aty_ld_8(DAC_CNTL, info);
+ aty_st_8(DAC_CNTL, (temp & ~(DAC_EXT_SEL_RS2 | DAC_EXT_SEL_RS3)), info);
+
+ aty_st_le32(BUS_CNTL, 0x890e20f1, info);
+ aty_st_le32(DAC_CNTL, 0x47052100, info);
+
+ return 0;
+}
+
+const struct aty_dac_ops aty_dac_ati68860b = {
+ set_dac: aty_set_dac_ATI68860_B,
+};
+
+
+ /*
+ * AT&T 21C498 DAC
+ */
+
+static int aty_set_dac_ATT21C498(const struct fb_info_aty *info,
+ const union aty_pll *pll, u32 bpp, u32 accel)
+{
+ u32 dotClock;
+ int muxmode = 0;
+ int DACMask = 0;
+
+ dotClock = 100000000 / pll->ics2595.period_in_ps;
+
+ switch (bpp) {
+ case 8:
+ if (dotClock > 8000) {
+ DACMask = 0x24;
+ muxmode = 1;
+ } else
+ DACMask = 0x04;
+ break;
+ case 15:
+ DACMask = 0x16;
+ break;
+ case 16:
+ DACMask = 0x36;
+ break;
+ case 24:
+ DACMask = 0xE6;
+ break;
+ case 32:
+ DACMask = 0xE6;
+ break;
+ }
+
+ if (1 /* info->mach64DAC8Bit */)
+ DACMask |= 0x02;
+
+ aty_dac_waste4(info);
+ aty_st_8(DAC_REGS + 2, DACMask, info);
+
+ aty_st_le32(BUS_CNTL, 0x890e20f1, info);
+ aty_st_le32(DAC_CNTL, 0x00072000, info);
+ return muxmode;
+}
+
+const struct aty_dac_ops aty_dac_att21c498 = {
+ set_dac: aty_set_dac_ATT21C498,
+};
+
+
+ /*
+ * ATI 18818 / ICS 2595 Clock Chip
+ */
+
+static int aty_var_to_pll_18818(const struct fb_info_aty *info, u32 vclk_per,
+ u8 bpp, union aty_pll *pll)
+{
+ u32 MHz100; /* in 0.01 MHz */
+ u32 program_bits;
+ u32 post_divider;
+
+ /* Calculate the programming word */
+ MHz100 = 100000000 / vclk_per;
+
+ program_bits = -1;
+ post_divider = 1;
+
+ if (MHz100 > MAX_FREQ_2595) {
+ MHz100 = MAX_FREQ_2595;
+ return -EINVAL;
+ } else if (MHz100 < ABS_MIN_FREQ_2595) {
+ program_bits = 0; /* MHz100 = 257 */
+ return -EINVAL;
+ } else {
+ while (MHz100 < MIN_FREQ_2595) {
+ MHz100 *= 2;
+ post_divider *= 2;
+ }
+ }
+ MHz100 *= 1000;
+ MHz100 = (REF_DIV_2595 * MHz100) / REF_FREQ_2595;
+
+ MHz100 += 500; /* + 0.5 round */
+ MHz100 /= 1000;
+
+ if (program_bits == -1) {
+ program_bits = MHz100 - N_ADJ_2595;
+ switch (post_divider) {
+ case 1:
+ program_bits |= 0x0600;
+ break;
+ case 2:
+ program_bits |= 0x0400;
+ break;
+ case 4:
+ program_bits |= 0x0200;
+ break;
+ case 8:
+ default:
+ break;
+ }
+ }
+
+ program_bits |= STOP_BITS_2595;
+
+ pll->ics2595.program_bits = program_bits;
+ pll->ics2595.locationAddr = 0;
+ pll->ics2595.post_divider = post_divider;
+ pll->ics2595.period_in_ps = vclk_per;
+
+ return 0;
+}
+
+static u32 aty_pll_18818_to_var(const struct fb_info_aty *info,
+ const union aty_pll *pll)
+{
+ return(pll->ics2595.period_in_ps); /* default for now */
+}
+
+static void aty_ICS2595_put1bit(u8 data, const struct fb_info_aty *info)
+{
+ u8 tmp;
+
+ data &= 0x01;
+ tmp = aty_ld_8(CLOCK_CNTL, info);
+ aty_st_8(CLOCK_CNTL + info->clk_wr_offset, (tmp & ~0x04) | (data << 2),
+ info);
+
+ tmp = aty_ld_8(CLOCK_CNTL, info);
+ aty_st_8(CLOCK_CNTL + info->clk_wr_offset, (tmp & ~0x08) | (0 << 3), info);
+
+ aty_StrobeClock(info);
+
+ tmp = aty_ld_8(CLOCK_CNTL, info);
+ aty_st_8(CLOCK_CNTL + info->clk_wr_offset, (tmp & ~0x08) | (1 << 3), info);
+
+ aty_StrobeClock(info);
+
+ return;
+}
+
+static void aty_set_pll18818(const struct fb_info_aty *info,
+ const union aty_pll *pll)
+{
+ u32 program_bits;
+ u32 locationAddr;
+
+ u32 i;
+
+ u8 old_clock_cntl;
+ u8 old_crtc_ext_disp;
+
+ old_clock_cntl = aty_ld_8(CLOCK_CNTL, info);
+ aty_st_8(CLOCK_CNTL + info->clk_wr_offset, 0, info);
+
+ old_crtc_ext_disp = aty_ld_8(CRTC_GEN_CNTL + 3, info);
+ aty_st_8(CRTC_GEN_CNTL + 3, old_crtc_ext_disp | (CRTC_EXT_DISP_EN >> 24),
+ info);
+
+ mdelay(15); /* delay for 50 (15) ms */
+
+ program_bits = pll->ics2595.program_bits;
+ locationAddr = pll->ics2595.locationAddr;
+
+ /* Program the clock chip */
+ aty_st_8(CLOCK_CNTL + info->clk_wr_offset, 0, info); /* Strobe = 0 */
+ aty_StrobeClock(info);
+ aty_st_8(CLOCK_CNTL + info->clk_wr_offset, 1, info); /* Strobe = 0 */
+ aty_StrobeClock(info);
+
+ aty_ICS2595_put1bit(1, info); /* Send start bits */
+ aty_ICS2595_put1bit(0, info); /* Start bit */
+ aty_ICS2595_put1bit(0, info); /* Read / ~Write */
+
+ for (i = 0; i < 5; i++) { /* Location 0..4 */
+ aty_ICS2595_put1bit(locationAddr & 1, info);
+ locationAddr >>= 1;
+ }
+
+ for (i = 0; i < 8 + 1 + 2 + 2; i++) {
+ aty_ICS2595_put1bit(program_bits & 1, info);
+ program_bits >>= 1;
+ }
+
+ mdelay(1); /* delay for 1 ms */
+
+ (void)aty_ld_8(DAC_REGS, info); /* Clear DAC Counter */
+ aty_st_8(CRTC_GEN_CNTL + 3, old_crtc_ext_disp, info);
+ aty_st_8(CLOCK_CNTL + info->clk_wr_offset, old_clock_cntl | CLOCK_STROBE,
+ info);
+
+ mdelay(50); /* delay for 50 (15) ms */
+ aty_st_8(CLOCK_CNTL + info->clk_wr_offset,
+ ((pll->ics2595.locationAddr & 0x0F) | CLOCK_STROBE), info);
+
+ return;
+}
+
+const struct aty_pll_ops aty_pll_ati18818_1 = {
+ var_to_pll: aty_var_to_pll_18818,
+ pll_to_var: aty_pll_18818_to_var,
+ set_pll: aty_set_pll18818,
+};
+
+
+ /*
+ * STG 1703 Clock Chip
+ */
+
+static int aty_var_to_pll_1703(const struct fb_info_aty *info, u32 vclk_per,
+ u8 bpp, union aty_pll *pll)
+{
+ u32 mhz100; /* in 0.01 MHz */
+ u32 program_bits;
+ /* u32 post_divider; */
+ u32 mach64MinFreq, mach64MaxFreq, mach64RefFreq;
+ u32 temp, tempB;
+ u16 remainder, preRemainder;
+ short divider = 0, tempA;
+
+ /* Calculate the programming word */
+ mhz100 = 100000000 / vclk_per;
+ mach64MinFreq = MIN_FREQ_2595;
+ mach64MaxFreq = MAX_FREQ_2595;
+ mach64RefFreq = REF_FREQ_2595; /* 14.32 MHz */
+
+ /* Calculate program word */
+ if (mhz100 == 0)
+ program_bits = 0xE0;
+ else {
+ if (mhz100 < mach64MinFreq)
+ mhz100 = mach64MinFreq;
+ if (mhz100 > mach64MaxFreq)
+ mhz100 = mach64MaxFreq;
+
+ divider = 0;
+ while (mhz100 < (mach64MinFreq << 3)) {
+ mhz100 <<= 1;
+ divider += 0x20;
+ }
+
+ temp = (unsigned int)(mhz100);
+ temp = (unsigned int)(temp * (MIN_N_1703 + 2));
+ temp -= (short)(mach64RefFreq << 1);
+
+ tempA = MIN_N_1703;
+ preRemainder = 0xffff;
+
+ do {
+ tempB = temp;
+ remainder = tempB % mach64RefFreq;
+ tempB = tempB / mach64RefFreq;
+
+ if ((tempB & 0xffff) <= 127 && (remainder <= preRemainder)) {
+ preRemainder = remainder;
+ divider &= ~0x1f;
+ divider |= tempA;
+ divider = (divider & 0x00ff) + ((tempB & 0xff) << 8);
+ }
+
+ temp += mhz100;
+ tempA++;
+ } while (tempA <= (MIN_N_1703 << 1));
+
+ program_bits = divider;
+ }
+
+ pll->ics2595.program_bits = program_bits;
+ pll->ics2595.locationAddr = 0;
+ pll->ics2595.post_divider = divider; /* fuer nix */
+ pll->ics2595.period_in_ps = vclk_per;
+
+ return 0;
+}
+
+static u32 aty_pll_1703_to_var(const struct fb_info_aty *info,
+ const union aty_pll *pll)
+{
+ return(pll->ics2595.period_in_ps); /* default for now */
+}
+
+static void aty_set_pll_1703(const struct fb_info_aty *info,
+ const union aty_pll *pll)
+{
+ u32 program_bits;
+ u32 locationAddr;
+
+ char old_crtc_ext_disp;
+
+ old_crtc_ext_disp = aty_ld_8(CRTC_GEN_CNTL + 3, info);
+ aty_st_8(CRTC_GEN_CNTL + 3, old_crtc_ext_disp | (CRTC_EXT_DISP_EN >> 24),
+ info);
+
+ program_bits = pll->ics2595.program_bits;
+ locationAddr = pll->ics2595.locationAddr;
+
+ /* Program clock */
+ aty_dac_waste4(info);
+
+ (void)aty_ld_8(DAC_REGS + 2, info);
+ aty_st_8(DAC_REGS+2, (locationAddr << 1) + 0x20, info);
+ aty_st_8(DAC_REGS+2, 0, info);
+ aty_st_8(DAC_REGS+2, (program_bits & 0xFF00) >> 8, info);
+ aty_st_8(DAC_REGS+2, (program_bits & 0xFF), info);
+
+ (void)aty_ld_8(DAC_REGS, info); /* Clear DAC Counter */
+ aty_st_8(CRTC_GEN_CNTL + 3, old_crtc_ext_disp, info);
+
+ return;
+}
+
+const struct aty_pll_ops aty_pll_stg1703 = {
+ var_to_pll: aty_var_to_pll_1703,
+ pll_to_var: aty_pll_1703_to_var,
+ set_pll: aty_set_pll_1703,
+};
+
+
+ /*
+ * Chrontel 8398 Clock Chip
+ */
+
+static int aty_var_to_pll_8398(const struct fb_info_aty *info, u32 vclk_per,
+ u8 bpp, union aty_pll *pll)
+{
+ u32 tempA, tempB, fOut, longMHz100, diff, preDiff;
+
+ u32 mhz100; /* in 0.01 MHz */
+ u32 program_bits;
+ /* u32 post_divider; */
+ u32 mach64MinFreq, mach64MaxFreq, mach64RefFreq;
+ u16 m, n, k=0, save_m, save_n, twoToKth;
+
+ /* Calculate the programming word */
+ mhz100 = 100000000 / vclk_per;
+ mach64MinFreq = MIN_FREQ_2595;
+ mach64MaxFreq = MAX_FREQ_2595;
+ mach64RefFreq = REF_FREQ_2595; /* 14.32 MHz */
+
+ save_m = 0;
+ save_n = 0;
+
+ /* Calculate program word */
+ if (mhz100 == 0)
+ program_bits = 0xE0;
+ else
+ {
+ if (mhz100 < mach64MinFreq)
+ mhz100 = mach64MinFreq;
+ if (mhz100 > mach64MaxFreq)
+ mhz100 = mach64MaxFreq;
+
+ longMHz100 = mhz100 * 256 / 100; /* 8 bit scale this */
+
+ while (mhz100 < (mach64MinFreq << 3))
+ {
+ mhz100 <<= 1;
+ k++;
+ }
+
+ twoToKth = 1 << k;
+ diff = 0;
+ preDiff = 0xFFFFFFFF;
+
+ for (m = MIN_M; m <= MAX_M; m++)
+ {
+ for (n = MIN_N; n <= MAX_N; n++)
+ {
+ tempA = (14.31818 * 65536);
+ tempA *= (n + 8); /* 43..256 */
+ tempB = twoToKth * 256;
+ tempB *= (m + 2); /* 4..32 */
+ fOut = tempA / tempB; /* 8 bit scale */
+
+ if (longMHz100 > fOut)
+ diff = longMHz100 - fOut;
+ else
+ diff = fOut - longMHz100;
+
+ if (diff < preDiff)
+ {
+ save_m = m;
+ save_n = n;
+ preDiff = diff;
+ }
+ }
+ }
+
+ program_bits = (k << 6) + (save_m) + (save_n << 8);
+ }
+
+ pll->ics2595.program_bits = program_bits;
+ pll->ics2595.locationAddr = 0;
+ pll->ics2595.post_divider = 0;
+ pll->ics2595.period_in_ps = vclk_per;
+
+ return 0;
+}
+
+static u32 aty_pll_8398_to_var(const struct fb_info_aty *info,
+ const union aty_pll *pll)
+{
+ return(pll->ics2595.period_in_ps); /* default for now */
+}
+
+static void aty_set_pll_8398(const struct fb_info_aty *info,
+ const union aty_pll *pll)
+{
+ u32 program_bits;
+ u32 locationAddr;
+
+ char old_crtc_ext_disp;
+ char tmp;
+
+ old_crtc_ext_disp = aty_ld_8(CRTC_GEN_CNTL + 3, info);
+ aty_st_8(CRTC_GEN_CNTL + 3, old_crtc_ext_disp | (CRTC_EXT_DISP_EN >> 24),
+ info);
+
+ program_bits = pll->ics2595.program_bits;
+ locationAddr = pll->ics2595.locationAddr;
+
+ /* Program clock */
+ tmp = aty_ld_8(DAC_CNTL, info);
+ aty_st_8(DAC_CNTL, tmp | DAC_EXT_SEL_RS2 | DAC_EXT_SEL_RS3, info);
+
+ aty_st_8(DAC_REGS, locationAddr, info);
+ aty_st_8(DAC_REGS+1, (program_bits & 0xff00) >> 8, info);
+ aty_st_8(DAC_REGS+1, (program_bits & 0xff), info);
+
+ tmp = aty_ld_8(DAC_CNTL, info);
+ aty_st_8(DAC_CNTL, (tmp & ~DAC_EXT_SEL_RS2) | DAC_EXT_SEL_RS3, info);
+
+ (void)aty_ld_8(DAC_REGS, info); /* Clear DAC Counter */
+ aty_st_8(CRTC_GEN_CNTL + 3, old_crtc_ext_disp, info);
+
+ return;
+}
+
+const struct aty_pll_ops aty_pll_ch8398 = {
+ var_to_pll: aty_var_to_pll_8398,
+ pll_to_var: aty_pll_8398_to_var,
+ set_pll: aty_set_pll_8398,
+};
+
+
+ /*
+ * AT&T 20C408 Clock Chip
+ */
+
+static int aty_var_to_pll_408(const struct fb_info_aty *info, u32 vclk_per,
+ u8 bpp, union aty_pll *pll)
+{
+ u32 mhz100; /* in 0.01 MHz */
+ u32 program_bits;
+ /* u32 post_divider; */
+ u32 mach64MinFreq, mach64MaxFreq, mach64RefFreq;
+ u32 temp, tempB;
+ u16 remainder, preRemainder;
+ short divider = 0, tempA;
+
+ /* Calculate the programming word */
+ mhz100 = 100000000 / vclk_per;
+ mach64MinFreq = MIN_FREQ_2595;
+ mach64MaxFreq = MAX_FREQ_2595;
+ mach64RefFreq = REF_FREQ_2595; /* 14.32 MHz */
+
+ /* Calculate program word */
+ if (mhz100 == 0)
+ program_bits = 0xFF;
+ else {
+ if (mhz100 < mach64MinFreq)
+ mhz100 = mach64MinFreq;
+ if (mhz100 > mach64MaxFreq)
+ mhz100 = mach64MaxFreq;
+
+ while (mhz100 < (mach64MinFreq << 3)) {
+ mhz100 <<= 1;
+ divider += 0x40;
+ }
+
+ temp = (unsigned int)mhz100;
+ temp = (unsigned int)(temp * (MIN_N_408 + 2));
+ temp -= ((short)(mach64RefFreq << 1));
+
+ tempA = MIN_N_408;
+ preRemainder = 0xFFFF;
+
+ do {
+ tempB = temp;
+ remainder = tempB % mach64RefFreq;
+ tempB = tempB / mach64RefFreq;
+ if (((tempB & 0xFFFF) <= 255) && (remainder <= preRemainder)) {
+ preRemainder = remainder;
+ divider &= ~0x3f;
+ divider |= tempA;
+ divider = (divider & 0x00FF) + ((tempB & 0xFF) << 8);
+ }
+ temp += mhz100;
+ tempA++;
+ } while(tempA <= 32);
+
+ program_bits = divider;
+ }
+
+ pll->ics2595.program_bits = program_bits;
+ pll->ics2595.locationAddr = 0;
+ pll->ics2595.post_divider = divider; /* fuer nix */
+ pll->ics2595.period_in_ps = vclk_per;
+
+ return 0;
+}
+
+static u32 aty_pll_408_to_var(const struct fb_info_aty *info,
+ const union aty_pll *pll)
+{
+ return(pll->ics2595.period_in_ps); /* default for now */
+}
+
+static void aty_set_pll_408(const struct fb_info_aty *info,
+ const union aty_pll *pll)
+{
+ u32 program_bits;
+ u32 locationAddr;
+
+ u8 tmpA, tmpB, tmpC;
+ char old_crtc_ext_disp;
+
+ old_crtc_ext_disp = aty_ld_8(CRTC_GEN_CNTL + 3, info);
+ aty_st_8(CRTC_GEN_CNTL + 3, old_crtc_ext_disp | (CRTC_EXT_DISP_EN >> 24),
+ info);
+
+ program_bits = pll->ics2595.program_bits;
+ locationAddr = pll->ics2595.locationAddr;
+
+ /* Program clock */
+ aty_dac_waste4(info);
+ tmpB = aty_ld_8(DAC_REGS + 2, info) | 1;
+ aty_dac_waste4(info);
+ aty_st_8(DAC_REGS + 2, tmpB, info);
+
+ tmpA = tmpB;
+ tmpC = tmpA;
+ tmpA |= 8;
+ tmpB = 1;
+
+ aty_st_8(DAC_REGS, tmpB, info);
+ aty_st_8(DAC_REGS + 2, tmpA, info);
+
+ udelay(400); /* delay for 400 us */
+
+ locationAddr = (locationAddr << 2) + 0x40;
+ tmpB = locationAddr;
+ tmpA = program_bits >> 8;
+
+ aty_st_8(DAC_REGS, tmpB, info);
+ aty_st_8(DAC_REGS + 2, tmpA, info);
+
+ tmpB = locationAddr + 1;
+ tmpA = (u8)program_bits;
+
+ aty_st_8(DAC_REGS, tmpB, info);
+ aty_st_8(DAC_REGS + 2, tmpA, info);
+
+ tmpB = locationAddr + 2;
+ tmpA = 0x77;
+
+ aty_st_8(DAC_REGS, tmpB, info);
+ aty_st_8(DAC_REGS + 2, tmpA, info);
+
+ udelay(400); /* delay for 400 us */
+ tmpA = tmpC & (~(1 | 8));
+ tmpB = 1;
+
+ aty_st_8(DAC_REGS, tmpB, info);
+ aty_st_8(DAC_REGS + 2, tmpA, info);
+
+ (void)aty_ld_8(DAC_REGS, info); /* Clear DAC Counter */
+ aty_st_8(CRTC_GEN_CNTL + 3, old_crtc_ext_disp, info);
+
+ return;
+}
+
+const struct aty_pll_ops aty_pll_att20c408 = {
+ var_to_pll: aty_var_to_pll_408,
+ pll_to_var: aty_pll_408_to_var,
+ set_pll: aty_set_pll_408,
+};
+
+
+ /*
+ * Unsupported DAC and Clock Chip
+ */
+
+static int aty_set_dac_unsupported(const struct fb_info_aty *info,
+ const union aty_pll *pll, u32 bpp,
+ u32 accel)
+{
+ aty_st_le32(BUS_CNTL, 0x890e20f1, info);
+ aty_st_le32(DAC_CNTL, 0x47052100, info);
+ /* new in 2.2.3p1 from Geert. ???????? */
+ aty_st_le32(BUS_CNTL, 0x590e10ff, info);
+ aty_st_le32(DAC_CNTL, 0x47012100, info);
+ return 0;
+}
+
+static int dummy(void)
+{
+ return 0;
+}
+
+const struct aty_dac_ops aty_dac_unsupported = {
+ set_dac: aty_set_dac_unsupported,
+};
+
+const struct aty_pll_ops aty_pll_unsupported = {
+ var_to_pll: (void *)dummy,
+ pll_to_var: (void *)dummy,
+ set_pll: (void *)dummy,
+};
+
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)