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path: root/drivers/video/kyro/STG4000InitDevice.c
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-rw-r--r--drivers/video/kyro/STG4000InitDevice.c326
1 files changed, 326 insertions, 0 deletions
diff --git a/drivers/video/kyro/STG4000InitDevice.c b/drivers/video/kyro/STG4000InitDevice.c
new file mode 100644
index 0000000..7e33cd3
--- /dev/null
+++ b/drivers/video/kyro/STG4000InitDevice.c
@@ -0,0 +1,326 @@
+/*
+ * linux/drivers/video/kyro/STG4000InitDevice.c
+ *
+ * Copyright (C) 2000 Imagination Technologies Ltd
+ * Copyright (C) 2002 STMicroelectronics
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+
+#include "STG4000Reg.h"
+
+/* SDRAM fixed settings */
+#define SDRAM_CFG_0 0x49A1
+#define SDRAM_CFG_1 0xA732
+#define SDRAM_CFG_2 0x31
+#define SDRAM_ARB_CFG 0xA0
+#define SDRAM_REFRESH 0x20
+
+/* Reset values */
+#define PMX2_SOFTRESET_DAC_RST 0x0001
+#define PMX2_SOFTRESET_C1_RST 0x0004
+#define PMX2_SOFTRESET_C2_RST 0x0008
+#define PMX2_SOFTRESET_3D_RST 0x0010
+#define PMX2_SOFTRESET_VIDIN_RST 0x0020
+#define PMX2_SOFTRESET_TLB_RST 0x0040
+#define PMX2_SOFTRESET_SD_RST 0x0080
+#define PMX2_SOFTRESET_VGA_RST 0x0100
+#define PMX2_SOFTRESET_ROM_RST 0x0200 /* reserved bit, do not reset */
+#define PMX2_SOFTRESET_TA_RST 0x0400
+#define PMX2_SOFTRESET_REG_RST 0x4000
+#define PMX2_SOFTRESET_ALL 0x7fff
+
+/* Core clock freq */
+#define CORE_PLL_FREQ 1000000
+
+/* Reference Clock freq */
+#define REF_FREQ 14318
+
+/* PCI Registers */
+static u16 CorePllControl = 0x70;
+
+#define PCI_CONFIG_SUBSYS_ID 0x2e
+
+/* Misc */
+#define CORE_PLL_MODE_REG_0_7 3
+#define CORE_PLL_MODE_REG_8_15 2
+#define CORE_PLL_MODE_CONFIG_REG 1
+#define DAC_PLL_CONFIG_REG 0
+
+#define STG_MAX_VCO 500000
+#define STG_MIN_VCO 100000
+
+/* PLL Clock */
+#define STG4K3_PLL_SCALER 8 /* scale numbers by 2^8 for fixed point calc */
+#define STG4K3_PLL_MIN_R 2 /* Minimum multiplier */
+#define STG4K3_PLL_MAX_R 33 /* Max */
+#define STG4K3_PLL_MIN_F 2 /* Minimum divisor */
+#define STG4K3_PLL_MAX_F 513 /* Max */
+#define STG4K3_PLL_MIN_OD 0 /* Min output divider (shift) */
+#define STG4K3_PLL_MAX_OD 2 /* Max */
+#define STG4K3_PLL_MIN_VCO_SC (100000000 >> STG4K3_PLL_SCALER) /* Min VCO rate */
+#define STG4K3_PLL_MAX_VCO_SC (500000000 >> STG4K3_PLL_SCALER) /* Max VCO rate */
+#define STG4K3_PLL_MINR_VCO_SC (100000000 >> STG4K3_PLL_SCALER) /* Min VCO rate (restricted) */
+#define STG4K3_PLL_MAXR_VCO_SC (500000000 >> STG4K3_PLL_SCALER) /* Max VCO rate (restricted) */
+#define STG4K3_PLL_MINR_VCO 100000000 /* Min VCO rate (restricted) */
+#define STG4K3_PLL_MAX_VCO 500000000 /* Max VCO rate */
+#define STG4K3_PLL_MAXR_VCO 500000000 /* Max VCO rate (restricted) */
+
+#define OS_DELAY(X) \
+{ \
+volatile u32 i,count=0; \
+ for(i=0;i<X;i++) count++; \
+}
+
+static u32 InitSDRAMRegisters(volatile STG4000REG __iomem *pSTGReg,
+ u32 dwSubSysID, u32 dwRevID)
+{
+ u32 adwSDRAMArgCfg0[] = { 0xa0, 0x80, 0xa0, 0xa0, 0xa0 };
+ u32 adwSDRAMCfg1[] = { 0x8732, 0x8732, 0xa732, 0xa732, 0x8732 };
+ u32 adwSDRAMCfg2[] = { 0x87d2, 0x87d2, 0xa7d2, 0x87d2, 0xa7d2 };
+ u32 adwSDRAMRsh[] = { 36, 39, 40 };
+ u32 adwChipSpeed[] = { 110, 120, 125 };
+ u32 dwMemTypeIdx;
+ u32 dwChipSpeedIdx;
+
+ /* Get memory tpye and chip speed indexs from the SubSysDevID */
+ dwMemTypeIdx = (dwSubSysID & 0x70) >> 4;
+ dwChipSpeedIdx = (dwSubSysID & 0x180) >> 7;
+
+ if (dwMemTypeIdx > 4 || dwChipSpeedIdx > 2)
+ return 0;
+
+ /* Program SD-RAM interface */
+ STG_WRITE_REG(SDRAMArbiterConf, adwSDRAMArgCfg0[dwMemTypeIdx]);
+ if (dwRevID < 5) {
+ STG_WRITE_REG(SDRAMConf0, 0x49A1);
+ STG_WRITE_REG(SDRAMConf1, adwSDRAMCfg1[dwMemTypeIdx]);
+ } else {
+ STG_WRITE_REG(SDRAMConf0, 0x4DF1);
+ STG_WRITE_REG(SDRAMConf1, adwSDRAMCfg2[dwMemTypeIdx]);
+ }
+
+ STG_WRITE_REG(SDRAMConf2, 0x31);
+ STG_WRITE_REG(SDRAMRefresh, adwSDRAMRsh[dwChipSpeedIdx]);
+
+ return adwChipSpeed[dwChipSpeedIdx] * 10000;
+}
+
+u32 ProgramClock(u32 refClock,
+ u32 coreClock,
+ u32 * FOut, u32 * ROut, u32 * POut)
+{
+ u32 R = 0, F = 0, OD = 0, ODIndex = 0;
+ u32 ulBestR = 0, ulBestF = 0, ulBestOD = 0;
+ u32 ulBestVCO = 0, ulBestClk = 0, ulBestScore = 0;
+ u32 ulScore, ulPhaseScore, ulVcoScore;
+ u32 ulTmp = 0, ulVCO;
+ u32 ulScaleClockReq, ulMinClock, ulMaxClock;
+ u32 ODValues[] = { 1, 2, 0 };
+
+ /* Translate clock in Hz */
+ coreClock *= 100; /* in Hz */
+ refClock *= 1000; /* in Hz */
+
+ /* Work out acceptable clock
+ * The method calculates ~ +- 0.4% (1/256)
+ */
+ ulMinClock = coreClock - (coreClock >> 8);
+ ulMaxClock = coreClock + (coreClock >> 8);
+
+ /* Scale clock required for use in calculations */
+ ulScaleClockReq = coreClock >> STG4K3_PLL_SCALER;
+
+ /* Iterate through post divider values */
+ for (ODIndex = 0; ODIndex < 3; ODIndex++) {
+ OD = ODValues[ODIndex];
+ R = STG4K3_PLL_MIN_R;
+
+ /* loop for pre-divider from min to max */
+ while (R <= STG4K3_PLL_MAX_R) {
+ /* estimate required feedback multiplier */
+ ulTmp = R * (ulScaleClockReq << OD);
+
+ /* F = ClkRequired * R * (2^OD) / Fref */
+ F = (u32)(ulTmp / (refClock >> STG4K3_PLL_SCALER));
+
+ /* compensate for accuracy */
+ if (F > STG4K3_PLL_MIN_F)
+ F--;
+
+
+ /*
+ * We should be close to our target frequency (if it's
+ * achievable with current OD & R) let's iterate
+ * through F for best fit
+ */
+ while ((F >= STG4K3_PLL_MIN_F) &&
+ (F <= STG4K3_PLL_MAX_F)) {
+ /* Calc VCO at full accuracy */
+ ulVCO = refClock / R;
+ ulVCO = F * ulVCO;
+
+ /*
+ * Check it's within restricted VCO range
+ * unless of course the desired frequency is
+ * above the restricted range, then test
+ * against VCO limit
+ */
+ if ((ulVCO >= STG4K3_PLL_MINR_VCO) &&
+ ((ulVCO <= STG4K3_PLL_MAXR_VCO) ||
+ ((coreClock > STG4K3_PLL_MAXR_VCO)
+ && (ulVCO <= STG4K3_PLL_MAX_VCO)))) {
+ ulTmp = (ulVCO >> OD); /* Clock = VCO / (2^OD) */
+
+ /* Is this clock good enough? */
+ if ((ulTmp >= ulMinClock)
+ && (ulTmp <= ulMaxClock)) {
+ ulPhaseScore = (((refClock / R) - (refClock / STG4K3_PLL_MAX_R))) / ((refClock - (refClock / STG4K3_PLL_MAX_R)) >> 10);
+
+ ulVcoScore = ((ulVCO - STG4K3_PLL_MINR_VCO)) / ((STG4K3_PLL_MAXR_VCO - STG4K3_PLL_MINR_VCO) >> 10);
+ ulScore = ulPhaseScore + ulVcoScore;
+
+ if (!ulBestScore) {
+ ulBestVCO = ulVCO;
+ ulBestOD = OD;
+ ulBestF = F;
+ ulBestR = R;
+ ulBestClk = ulTmp;
+ ulBestScore =
+ ulScore;
+ }
+ /* is this better, ( aim for highest Score) */
+ /*--------------------------------------------------------------------------
+ Here we want to use a scoring system which will take account of both the
+ value at the phase comparater and the VCO output
+ to do this we will use a cumulative score between the two
+ The way this ends up is that we choose the first value in the loop anyway
+ but we shall keep this code in case new restrictions come into play
+ --------------------------------------------------------------------------*/
+ if ((ulScore >= ulBestScore) && (OD > 0)) {
+ ulBestVCO = ulVCO;
+ ulBestOD = OD;
+ ulBestF = F;
+ ulBestR = R;
+ ulBestClk = ulTmp;
+ ulBestScore =
+ ulScore;
+ }
+ }
+ }
+ F++;
+ }
+ R++;
+ }
+ }
+
+ /*
+ did we find anything?
+ Then return RFOD
+ */
+ if (ulBestScore) {
+ *ROut = ulBestR;
+ *FOut = ulBestF;
+
+ if ((ulBestOD == 2) || (ulBestOD == 3)) {
+ *POut = 3;
+ } else
+ *POut = ulBestOD;
+
+ }
+
+ return (ulBestClk);
+}
+
+int SetCoreClockPLL(volatile STG4000REG __iomem *pSTGReg, struct pci_dev *pDev)
+{
+ u32 F, R, P;
+ u16 core_pll = 0, sub;
+ u32 ulCoreClock;
+ u32 tmp;
+ u32 ulChipSpeed;
+ u8 rev;
+
+ STG_WRITE_REG(IntMask, 0xFFFF);
+
+ /* Disable Primary Core Thread0 */
+ tmp = STG_READ_REG(Thread0Enable);
+ CLEAR_BIT(0);
+ STG_WRITE_REG(Thread0Enable, tmp);
+
+ /* Disable Primary Core Thread1 */
+ tmp = STG_READ_REG(Thread1Enable);
+ CLEAR_BIT(0);
+ STG_WRITE_REG(Thread1Enable, tmp);
+
+ STG_WRITE_REG(SoftwareReset,
+ PMX2_SOFTRESET_REG_RST | PMX2_SOFTRESET_ROM_RST);
+ STG_WRITE_REG(SoftwareReset,
+ PMX2_SOFTRESET_REG_RST | PMX2_SOFTRESET_TA_RST |
+ PMX2_SOFTRESET_ROM_RST);
+
+ /* Need to play around to reset TA */
+ STG_WRITE_REG(TAConfiguration, 0);
+ STG_WRITE_REG(SoftwareReset,
+ PMX2_SOFTRESET_REG_RST | PMX2_SOFTRESET_ROM_RST);
+ STG_WRITE_REG(SoftwareReset,
+ PMX2_SOFTRESET_REG_RST | PMX2_SOFTRESET_TA_RST |
+ PMX2_SOFTRESET_ROM_RST);
+
+ pci_read_config_word(pDev, PCI_CONFIG_SUBSYS_ID, &sub);
+ pci_read_config_byte(pDev, PCI_REVISION_ID, &rev);
+
+ ulChipSpeed = InitSDRAMRegisters(pSTGReg, (u32)sub, (u32)rev);
+
+ if (ulChipSpeed == 0)
+ return -EINVAL;
+
+ ulCoreClock = ProgramClock(REF_FREQ, CORE_PLL_FREQ, &F, &R, &P);
+
+ core_pll |= ((P) | ((F - 2) << 2) | ((R - 2) << 11));
+
+ /* Set Core PLL Control to Core PLL Mode */
+
+ /* Send bits 0:7 of the Core PLL Mode register */
+ tmp = ((CORE_PLL_MODE_REG_0_7 << 8) | (core_pll & 0x00FF));
+ pci_write_config_word(pDev, CorePllControl, tmp);
+ /* Without some delay between the PCI config writes the clock does
+ not reliably set when the code is compiled -O3
+ */
+ OS_DELAY(1000000);
+
+ tmp |= SET_BIT(14);
+ pci_write_config_word(pDev, CorePllControl, tmp);
+ OS_DELAY(1000000);
+
+ /* Send bits 8:15 of the Core PLL Mode register */
+ tmp =
+ ((CORE_PLL_MODE_REG_8_15 << 8) | ((core_pll & 0xFF00) >> 8));
+ pci_write_config_word(pDev, CorePllControl, tmp);
+ OS_DELAY(1000000);
+
+ tmp |= SET_BIT(14);
+ pci_write_config_word(pDev, CorePllControl, tmp);
+ OS_DELAY(1000000);
+
+ STG_WRITE_REG(SoftwareReset, PMX2_SOFTRESET_ALL);
+
+#if 0
+ /* Enable Primary Core Thread0 */
+ tmp = ((STG_READ_REG(Thread0Enable)) | SET_BIT(0));
+ STG_WRITE_REG(Thread0Enable, tmp);
+
+ /* Enable Primary Core Thread1 */
+ tmp = ((STG_READ_REG(Thread1Enable)) | SET_BIT(0));
+ STG_WRITE_REG(Thread1Enable, tmp);
+#endif
+
+ return 0;
+}
generated by cgit v1.1 at 2024-12-25 15:12:08 +0000