X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=board%2Ffreescale%2Fcommon%2Fics307_clk.c;h=95a3cd778f43c33f3538695e9c992950a5afa21f;hb=8f082d78fafd94db3f21b503794e0875d3331e53;hp=89d8810f74e64b3992a7afd23515038188234734;hpb=9efac4a1eb99d9c5539aa6992025eeacab7980c6;p=u-boot

diff --git a/board/freescale/common/ics307_clk.c b/board/freescale/common/ics307_clk.c
index 89d8810f74..95a3cd778f 100644
--- a/board/freescale/common/ics307_clk.c
+++ b/board/freescale/common/ics307_clk.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2010 Freescale Semiconductor, Inc.
+ * Copyright 2010-2011 Freescale Semiconductor, Inc.
  *
  * See file CREDITS for list of people who contributed to this
  * project.
@@ -25,17 +25,91 @@
 
 #include "ics307_clk.h"
 
-#ifdef CONFIG_FSL_NGPIXIS
+#if defined(CONFIG_FSL_NGPIXIS)
 #include "ngpixis.h"
+#define fpga_reg pixis
+#elif defined(CONFIG_FSL_QIXIS)
+#include "qixis.h"
+#define fpga_reg ((struct qixis *)QIXIS_BASE)
 #else
 #include "pixis.h"
+#define fpga_reg pixis
 #endif
 
+/* define for SYS CLK or CLK1Frequency */
+#define TTL		1
+#define CLK2		0
+#define CRYSTAL		0
+#define MAX_VDW		(511 + 8)
+#define MAX_RDW		(127 + 2)
+#define MIN_VDW		(4 + 8)
+#define MIN_RDW		(1 + 2)
+#define NUM_OD_SETTING	8
+/*
+ * These defines cover the industrial temperature range part,
+ * for commercial, change below to 400000 and 55000, respectively
+ */
+#define MAX_VCO		360000
+#define MIN_VCO		60000
+
 /* decode S[0-2] to Output Divider (OD) */
 static u8 ics307_s_to_od[] = {
 	10, 2, 8, 4, 5, 7, 3, 6
 };
 
+/*
+ * Find one solution to generate required frequency for SYSCLK
+ * out_freq: KHz, required frequency to the SYSCLK
+ * the result will be retuned with component RDW, VDW, OD, TTL,
+ * CLK2 and crystal
+ */
+unsigned long ics307_sysclk_calculator(unsigned long out_freq)
+{
+	const unsigned long input_freq = CONFIG_ICS307_REFCLK_HZ;
+	unsigned long vdw, rdw, odp, s_vdw = 0, s_rdw = 0, s_odp = 0, od;
+	unsigned long tmp_out, diff, result = 0;
+	int found = 0;
+
+	for (odp = 0; odp < NUM_OD_SETTING; odp++) {
+		od = ics307_s_to_od[odp];
+		if (od * out_freq < MIN_VCO || od * out_freq > MAX_VCO)
+			continue;
+		for (rdw = MIN_RDW; rdw <= MAX_RDW; rdw++) {
+			/* Calculate the VDW */
+			vdw = out_freq * 1000 * od * rdw / (input_freq * 2);
+			if (vdw > MAX_VDW)
+				vdw = MAX_VDW;
+			if (vdw < MIN_VDW)
+				continue;
+			/* Calculate the temp out frequency */
+			tmp_out = input_freq * 2 * vdw / (rdw * od * 1000);
+			diff = MAX(out_freq, tmp_out) - MIN(out_freq, tmp_out);
+			/*
+			 * calculate the percent, the precision is 1/1000
+			 * If greater than 1/1000, continue
+			 * otherwise, we think the solution is we required
+			 */
+			if (diff * 1000 / out_freq > 1)
+				continue;
+			else {
+				s_vdw = vdw;
+				s_rdw = rdw;
+				s_odp = odp;
+				found = 1;
+				break;
+			}
+		}
+	}
+
+	if (found)
+		result = (s_rdw - 2) | (s_vdw - 8) << 7 | s_odp << 16 |
+			CLK2 << 19 | TTL << 21 | CRYSTAL << 22;
+
+	debug("ICS307-02: RDW: %ld, VDW: %ld, OD: %d\n", s_rdw - 2, s_vdw - 8,
+			ics307_s_to_od[s_odp]);
+	return result;
+}
+
 /*
  * Calculate frequency being generated by ICS307-02 clock chip based upon
  * the control bytes being programmed into it.
@@ -74,15 +148,15 @@ static unsigned long ics307_clk_freq(u8 cw0, u8 cw1, u8 cw2)
 unsigned long get_board_sys_clk(void)
 {
 	return ics307_clk_freq(
-			in_8(&pixis->sclk[0]),
-			in_8(&pixis->sclk[1]),
-			in_8(&pixis->sclk[2]));
+			in_8(&fpga_reg->sclk[0]),
+			in_8(&fpga_reg->sclk[1]),
+			in_8(&fpga_reg->sclk[2]));
 }
 
 unsigned long get_board_ddr_clk(void)
 {
 	return ics307_clk_freq(
-			in_8(&pixis->dclk[0]),
-			in_8(&pixis->dclk[1]),
-			in_8(&pixis->dclk[2]));
+			in_8(&fpga_reg->dclk[0]),
+			in_8(&fpga_reg->dclk[1]),
+			in_8(&fpga_reg->dclk[2]));
 }