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-rw-r--r--arch/arm/mach-omap2/omap3/clock.c799
1 files changed, 799 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/omap3/clock.c b/arch/arm/mach-omap2/omap3/clock.c
new file mode 100644
index 0000000..006969e
--- /dev/null
+++ b/arch/arm/mach-omap2/omap3/clock.c
@@ -0,0 +1,799 @@
+/*
+ * (C) Copyright 2008
+ * Texas Instruments, <www.ti.com>
+ *
+ * Author :
+ * Manikandan Pillai <mani.pillai@ti.com>
+ *
+ * Derived from Beagle Board and OMAP3 SDP code by
+ * Richard Woodruff <r-woodruff2@ti.com>
+ * Syed Mohammed Khasim <khasim@ti.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/clocks_omap3.h>
+#include <asm/arch/mem.h>
+#include <asm/arch/sys_proto.h>
+#include <environment.h>
+#include <command.h>
+
+/******************************************************************************
+ * get_sys_clk_speed() - determine reference oscillator speed
+ * based on known 32kHz clock and gptimer.
+ *****************************************************************************/
+u32 get_osc_clk_speed(void)
+{
+ u32 start, cstart, cend, cdiff, cdiv, val;
+ struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
+ struct prm *prm_base = (struct prm *)PRM_BASE;
+ struct gptimer *gpt1_base = (struct gptimer *)OMAP34XX_GPT1;
+ struct s32ktimer *s32k_base = (struct s32ktimer *)SYNC_32KTIMER_BASE;
+
+ val = readl(&prm_base->clksrc_ctrl);
+
+ if (val & SYSCLKDIV_2)
+ cdiv = 2;
+ else
+ cdiv = 1;
+
+ /* enable timer2 */
+ val = readl(&prcm_base->clksel_wkup) | CLKSEL_GPT1;
+
+ /* select sys_clk for GPT1 */
+ writel(val, &prcm_base->clksel_wkup);
+
+ /* Enable I and F Clocks for GPT1 */
+ val = readl(&prcm_base->iclken_wkup) | EN_GPT1 | EN_32KSYNC;
+ writel(val, &prcm_base->iclken_wkup);
+
+ val = readl(&prcm_base->fclken_wkup) | EN_GPT1;
+ writel(val, &prcm_base->fclken_wkup);
+
+ writel(0, &gpt1_base->tldr); /* start counting at 0 */
+ writel(GPT_EN, &gpt1_base->tclr); /* enable clock */
+
+ /* enable 32kHz source, determine sys_clk via gauging */
+
+ /* start time in 20 cycles */
+ start = 20 + readl(&s32k_base->s32k_cr);
+
+ /* dead loop till start time */
+ while (readl(&s32k_base->s32k_cr) < start);
+
+ /* get start sys_clk count */
+ cstart = readl(&gpt1_base->tcrr);
+
+ /* wait for 40 cycles */
+ while (readl(&s32k_base->s32k_cr) < (start + 20)) ;
+ cend = readl(&gpt1_base->tcrr); /* get end sys_clk count */
+ cdiff = cend - cstart; /* get elapsed ticks */
+ cdiff *= cdiv;
+
+ /* based on number of ticks assign speed */
+ if (cdiff > 19000)
+ return S38_4M;
+ else if (cdiff > 15200)
+ return S26M;
+ else if (cdiff > 13000)
+ return S24M;
+ else if (cdiff > 9000)
+ return S19_2M;
+ else if (cdiff > 7600)
+ return S13M;
+ else
+ return S12M;
+}
+
+/******************************************************************************
+ * get_sys_clkin_sel() - returns the sys_clkin_sel field value based on
+ * input oscillator clock frequency.
+ *****************************************************************************/
+void get_sys_clkin_sel(u32 osc_clk, u32 *sys_clkin_sel)
+{
+ switch(osc_clk) {
+ case S38_4M:
+ *sys_clkin_sel = 4;
+ break;
+ case S26M:
+ *sys_clkin_sel = 3;
+ break;
+ case S19_2M:
+ *sys_clkin_sel = 2;
+ break;
+ case S13M:
+ *sys_clkin_sel = 1;
+ break;
+ case S12M:
+ default:
+ *sys_clkin_sel = 0;
+ }
+}
+
+/*
+ * OMAP34XX/35XX specific functions
+ */
+
+static void dpll3_init_34xx(u32 sil_index, u32 clk_index)
+{
+ struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
+ dpll_param *ptr = (dpll_param *) get_core_dpll_param();
+ void (*f_lock_pll) (u32, u32, u32, u32);
+ int xip_safe, p0, p1, p2, p3;
+
+ xip_safe = is_running_in_sram();
+
+ /* Moving to the right sysclk and ES rev base */
+ ptr = ptr + (3 * clk_index) + sil_index;
+
+ if (xip_safe) {
+ /*
+ * CORE DPLL
+ */
+ clrsetbits_le32(&prcm_base->clken_pll,
+ 0x00000007, PLL_FAST_RELOCK_BYPASS);
+ wait_on_value(ST_CORE_CLK, 0, &prcm_base->idlest_ckgen,
+ LDELAY);
+
+ /*
+ * For OMAP3 ES1.0 Errata 1.50, default value directly doesn't
+ * work. write another value and then default value.
+ */
+
+ /* CM_CLKSEL1_EMU[DIV_DPLL3] */
+ clrsetbits_le32(&prcm_base->clksel1_emu,
+ 0x001F0000, (CORE_M3X2 + 1) << 16) ;
+ clrsetbits_le32(&prcm_base->clksel1_emu,
+ 0x001F0000, CORE_M3X2 << 16);
+
+ /* M2 (CORE_DPLL_CLKOUT_DIV): CM_CLKSEL1_PLL[27:31] */
+ clrsetbits_le32(&prcm_base->clksel1_pll,
+ 0xF8000000, ptr->m2 << 27);
+
+ /* M (CORE_DPLL_MULT): CM_CLKSEL1_PLL[16:26] */
+ clrsetbits_le32(&prcm_base->clksel1_pll,
+ 0x07FF0000, ptr->m << 16);
+
+ /* N (CORE_DPLL_DIV): CM_CLKSEL1_PLL[8:14] */
+ clrsetbits_le32(&prcm_base->clksel1_pll,
+ 0x00007F00, ptr->n << 8);
+
+ /* Source is the CM_96M_FCLK: CM_CLKSEL1_PLL[6] */
+ clrbits_le32(&prcm_base->clksel1_pll, 0x00000040);
+
+ /* SSI */
+ clrsetbits_le32(&prcm_base->clksel_core,
+ 0x00000F00, CORE_SSI_DIV << 8);
+ /* FSUSB */
+ clrsetbits_le32(&prcm_base->clksel_core,
+ 0x00000030, CORE_FUSB_DIV << 4);
+ /* L4 */
+ clrsetbits_le32(&prcm_base->clksel_core,
+ 0x0000000C, CORE_L4_DIV << 2);
+ /* L3 */
+ clrsetbits_le32(&prcm_base->clksel_core,
+ 0x00000003, CORE_L3_DIV);
+ /* GFX */
+ clrsetbits_le32(&prcm_base->clksel_gfx,
+ 0x00000007, GFX_DIV);
+ /* RESET MGR */
+ clrsetbits_le32(&prcm_base->clksel_wkup,
+ 0x00000006, WKUP_RSM << 1);
+ /* FREQSEL (CORE_DPLL_FREQSEL): CM_CLKEN_PLL[4:7] */
+ clrsetbits_le32(&prcm_base->clken_pll,
+ 0x000000F0, ptr->fsel << 4);
+ /* LOCK MODE */
+ clrsetbits_le32(&prcm_base->clken_pll,
+ 0x00000007, PLL_LOCK);
+
+ wait_on_value(ST_CORE_CLK, 1, &prcm_base->idlest_ckgen,
+ LDELAY);
+ } else if (is_running_in_flash()) {
+ /*
+ * if running from flash, jump to small relocated code
+ * area in SRAM.
+ */
+ f_lock_pll = (void *) (SRAM_CLK_CODE);
+
+ p0 = readl(&prcm_base->clken_pll);
+ clrsetbits_le32(&p0, 0x00000007, PLL_FAST_RELOCK_BYPASS);
+ /* FREQSEL (CORE_DPLL_FREQSEL): CM_CLKEN_PLL[4:7] */
+ clrsetbits_le32(&p0, 0x000000F0, ptr->fsel << 4);
+
+ p1 = readl(&prcm_base->clksel1_pll);
+ /* M2 (CORE_DPLL_CLKOUT_DIV): CM_CLKSEL1_PLL[27:31] */
+ clrsetbits_le32(&p1, 0xF8000000, ptr->m2 << 27);
+ /* M (CORE_DPLL_MULT): CM_CLKSEL1_PLL[16:26] */
+ clrsetbits_le32(&p1, 0x07FF0000, ptr->m << 16);
+ /* N (CORE_DPLL_DIV): CM_CLKSEL1_PLL[8:14] */
+ clrsetbits_le32(&p1, 0x00007F00, ptr->n << 8);
+ /* Source is the CM_96M_FCLK: CM_CLKSEL1_PLL[6] */
+ clrbits_le32(&p1, 0x00000040);
+
+ p2 = readl(&prcm_base->clksel_core);
+ /* SSI */
+ clrsetbits_le32(&p2, 0x00000F00, CORE_SSI_DIV << 8);
+ /* FSUSB */
+ clrsetbits_le32(&p2, 0x00000030, CORE_FUSB_DIV << 4);
+ /* L4 */
+ clrsetbits_le32(&p2, 0x0000000C, CORE_L4_DIV << 2);
+ /* L3 */
+ clrsetbits_le32(&p2, 0x00000003, CORE_L3_DIV);
+
+ p3 = (u32)&prcm_base->idlest_ckgen;
+
+ (*f_lock_pll) (p0, p1, p2, p3);
+ }
+}
+
+static void dpll4_init_34xx(u32 sil_index, u32 clk_index)
+{
+ struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
+ dpll_param *ptr = (dpll_param *) get_per_dpll_param();
+
+ /* Moving it to the right sysclk base */
+ ptr = ptr + clk_index;
+
+ /* EN_PERIPH_DPLL: CM_CLKEN_PLL[16:18] */
+ clrsetbits_le32(&prcm_base->clken_pll, 0x00070000, PLL_STOP << 16);
+ wait_on_value(ST_PERIPH_CLK, 0, &prcm_base->idlest_ckgen, LDELAY);
+
+ /*
+ * Errata 1.50 Workaround for OMAP3 ES1.0 only
+ * If using default divisors, write default divisor + 1
+ * and then the actual divisor value
+ */
+ /* M6 */
+ clrsetbits_le32(&prcm_base->clksel1_emu,
+ 0x1F000000, (PER_M6X2 + 1) << 24);
+ clrsetbits_le32(&prcm_base->clksel1_emu,
+ 0x1F000000, PER_M6X2 << 24);
+ /* M5 */
+ clrsetbits_le32(&prcm_base->clksel_cam, 0x0000001F, (PER_M5X2 + 1));
+ clrsetbits_le32(&prcm_base->clksel_cam, 0x0000001F, PER_M5X2);
+ /* M4 */
+ clrsetbits_le32(&prcm_base->clksel_dss, 0x0000001F, (PER_M4X2 + 1));
+ clrsetbits_le32(&prcm_base->clksel_dss, 0x0000001F, PER_M4X2);
+ /* M3 */
+ clrsetbits_le32(&prcm_base->clksel_dss,
+ 0x00001F00, (PER_M3X2 + 1) << 8);
+ clrsetbits_le32(&prcm_base->clksel_dss,
+ 0x00001F00, PER_M3X2 << 8);
+ /* M2 (DIV_96M): CM_CLKSEL3_PLL[0:4] */
+ clrsetbits_le32(&prcm_base->clksel3_pll, 0x0000001F, (ptr->m2 + 1));
+ clrsetbits_le32(&prcm_base->clksel3_pll, 0x0000001F, ptr->m2);
+ /* Workaround end */
+
+ /* M (PERIPH_DPLL_MULT): CM_CLKSEL2_PLL[8:18] */
+ clrsetbits_le32(&prcm_base->clksel2_pll,
+ 0x0007FF00, ptr->m << 8);
+
+ /* N (PERIPH_DPLL_DIV): CM_CLKSEL2_PLL[0:6] */
+ clrsetbits_le32(&prcm_base->clksel2_pll, 0x0000007F, ptr->n);
+
+ /* FREQSEL (PERIPH_DPLL_FREQSEL): CM_CLKEN_PLL[20:23] */
+ clrsetbits_le32(&prcm_base->clken_pll, 0x00F00000, ptr->fsel << 20);
+
+ /* LOCK MODE (EN_PERIPH_DPLL): CM_CLKEN_PLL[16:18] */
+ clrsetbits_le32(&prcm_base->clken_pll, 0x00070000, PLL_LOCK << 16);
+ wait_on_value(ST_PERIPH_CLK, 2, &prcm_base->idlest_ckgen, LDELAY);
+}
+
+static void dpll5_init_34xx(u32 sil_index, u32 clk_index)
+{
+ struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
+ dpll_param *ptr = (dpll_param *) get_per2_dpll_param();
+
+ /* Moving it to the right sysclk base */
+ ptr = ptr + clk_index;
+
+ /* PER2 DPLL (DPLL5) */
+ clrsetbits_le32(&prcm_base->clken2_pll, 0x00000007, PLL_STOP);
+ wait_on_value(1, 0, &prcm_base->idlest2_ckgen, LDELAY);
+ /* set M2 (usbtll_fck) */
+ clrsetbits_le32(&prcm_base->clksel5_pll, 0x0000001F, ptr->m2);
+ /* set m (11-bit multiplier) */
+ clrsetbits_le32(&prcm_base->clksel4_pll, 0x0007FF00, ptr->m << 8);
+ /* set n (7-bit divider)*/
+ clrsetbits_le32(&prcm_base->clksel4_pll, 0x0000007F, ptr->n);
+ /* FREQSEL */
+ clrsetbits_le32(&prcm_base->clken_pll, 0x000000F0, ptr->fsel << 4);
+ /* lock mode */
+ clrsetbits_le32(&prcm_base->clken2_pll, 0x00000007, PLL_LOCK);
+ wait_on_value(1, 1, &prcm_base->idlest2_ckgen, LDELAY);
+}
+
+static void mpu_init_34xx(u32 sil_index, u32 clk_index)
+{
+ struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
+ dpll_param *ptr = (dpll_param *) get_mpu_dpll_param();
+
+ /* Moving to the right sysclk and ES rev base */
+ ptr = ptr + (3 * clk_index) + sil_index;
+
+ /* MPU DPLL (unlocked already) */
+
+ /* M2 (MPU_DPLL_CLKOUT_DIV) : CM_CLKSEL2_PLL_MPU[0:4] */
+ clrsetbits_le32(&prcm_base->clksel2_pll_mpu,
+ 0x0000001F, ptr->m2);
+
+ /* M (MPU_DPLL_MULT) : CM_CLKSEL2_PLL_MPU[8:18] */
+ clrsetbits_le32(&prcm_base->clksel1_pll_mpu,
+ 0x0007FF00, ptr->m << 8);
+
+ /* N (MPU_DPLL_DIV) : CM_CLKSEL2_PLL_MPU[0:6] */
+ clrsetbits_le32(&prcm_base->clksel1_pll_mpu,
+ 0x0000007F, ptr->n);
+
+ /* FREQSEL (MPU_DPLL_FREQSEL) : CM_CLKEN_PLL_MPU[4:7] */
+ clrsetbits_le32(&prcm_base->clken_pll_mpu,
+ 0x000000F0, ptr->fsel << 4);
+}
+
+static void iva_init_34xx(u32 sil_index, u32 clk_index)
+{
+ struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
+ dpll_param *ptr = (dpll_param *) get_iva_dpll_param();
+
+ /* Moving to the right sysclk and ES rev base */
+ ptr = ptr + (3 * clk_index) + sil_index;
+
+ /* IVA DPLL */
+ /* EN_IVA2_DPLL : CM_CLKEN_PLL_IVA2[0:2] */
+ clrsetbits_le32(&prcm_base->clken_pll_iva2,
+ 0x00000007, PLL_STOP);
+ wait_on_value(ST_IVA2_CLK, 0, &prcm_base->idlest_pll_iva2, LDELAY);
+
+ /* M2 (IVA2_DPLL_CLKOUT_DIV) : CM_CLKSEL2_PLL_IVA2[0:4] */
+ clrsetbits_le32(&prcm_base->clksel2_pll_iva2,
+ 0x0000001F, ptr->m2);
+
+ /* M (IVA2_DPLL_MULT) : CM_CLKSEL1_PLL_IVA2[8:18] */
+ clrsetbits_le32(&prcm_base->clksel1_pll_iva2,
+ 0x0007FF00, ptr->m << 8);
+
+ /* N (IVA2_DPLL_DIV) : CM_CLKSEL1_PLL_IVA2[0:6] */
+ clrsetbits_le32(&prcm_base->clksel1_pll_iva2,
+ 0x0000007F, ptr->n);
+
+ /* FREQSEL (IVA2_DPLL_FREQSEL) : CM_CLKEN_PLL_IVA2[4:7] */
+ clrsetbits_le32(&prcm_base->clken_pll_iva2,
+ 0x000000F0, ptr->fsel << 4);
+
+ /* LOCK MODE (EN_IVA2_DPLL) : CM_CLKEN_PLL_IVA2[0:2] */
+ clrsetbits_le32(&prcm_base->clken_pll_iva2,
+ 0x00000007, PLL_LOCK);
+
+ wait_on_value(ST_IVA2_CLK, 1, &prcm_base->idlest_pll_iva2, LDELAY);
+}
+
+/*
+ * OMAP3630 specific functions
+ */
+
+static void dpll3_init_36xx(u32 sil_index, u32 clk_index)
+{
+ struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
+ dpll_param *ptr = (dpll_param *) get_36x_core_dpll_param();
+ void (*f_lock_pll) (u32, u32, u32, u32);
+ int xip_safe, p0, p1, p2, p3;
+
+ xip_safe = is_running_in_sram();
+
+ /* Moving it to the right sysclk base */
+ ptr += clk_index;
+
+ if (xip_safe) {
+ /* CORE DPLL */
+
+ /* Select relock bypass: CM_CLKEN_PLL[0:2] */
+ clrsetbits_le32(&prcm_base->clken_pll,
+ 0x00000007, PLL_FAST_RELOCK_BYPASS);
+ wait_on_value(ST_CORE_CLK, 0, &prcm_base->idlest_ckgen,
+ LDELAY);
+
+ /* CM_CLKSEL1_EMU[DIV_DPLL3] */
+ clrsetbits_le32(&prcm_base->clksel1_emu,
+ 0x001F0000, CORE_M3X2 << 16);
+
+ /* M2 (CORE_DPLL_CLKOUT_DIV): CM_CLKSEL1_PLL[27:31] */
+ clrsetbits_le32(&prcm_base->clksel1_pll,
+ 0xF8000000, ptr->m2 << 27);
+
+ /* M (CORE_DPLL_MULT): CM_CLKSEL1_PLL[16:26] */
+ clrsetbits_le32(&prcm_base->clksel1_pll,
+ 0x07FF0000, ptr->m << 16);
+
+ /* N (CORE_DPLL_DIV): CM_CLKSEL1_PLL[8:14] */
+ clrsetbits_le32(&prcm_base->clksel1_pll,
+ 0x00007F00, ptr->n << 8);
+
+ /* Source is the CM_96M_FCLK: CM_CLKSEL1_PLL[6] */
+ clrbits_le32(&prcm_base->clksel1_pll, 0x00000040);
+
+ /* SSI */
+ clrsetbits_le32(&prcm_base->clksel_core,
+ 0x00000F00, CORE_SSI_DIV << 8);
+ /* FSUSB */
+ clrsetbits_le32(&prcm_base->clksel_core,
+ 0x00000030, CORE_FUSB_DIV << 4);
+ /* L4 */
+ clrsetbits_le32(&prcm_base->clksel_core,
+ 0x0000000C, CORE_L4_DIV << 2);
+ /* L3 */
+ clrsetbits_le32(&prcm_base->clksel_core,
+ 0x00000003, CORE_L3_DIV);
+ /* GFX */
+ clrsetbits_le32(&prcm_base->clksel_gfx,
+ 0x00000007, GFX_DIV_36X);
+ /* RESET MGR */
+ clrsetbits_le32(&prcm_base->clksel_wkup,
+ 0x00000006, WKUP_RSM << 1);
+ /* FREQSEL (CORE_DPLL_FREQSEL): CM_CLKEN_PLL[4:7] */
+ clrsetbits_le32(&prcm_base->clken_pll,
+ 0x000000F0, ptr->fsel << 4);
+ /* LOCK MODE */
+ clrsetbits_le32(&prcm_base->clken_pll,
+ 0x00000007, PLL_LOCK);
+
+ wait_on_value(ST_CORE_CLK, 1, &prcm_base->idlest_ckgen,
+ LDELAY);
+ } else if (is_running_in_flash()) {
+ /*
+ * if running from flash, jump to small relocated code
+ * area in SRAM.
+ */
+ f_lock_pll = (void *) (SRAM_CLK_CODE);
+
+ p0 = readl(&prcm_base->clken_pll);
+ clrsetbits_le32(&p0, 0x00000007, PLL_FAST_RELOCK_BYPASS);
+ /* FREQSEL (CORE_DPLL_FREQSEL): CM_CLKEN_PLL[4:7] */
+ clrsetbits_le32(&p0, 0x000000F0, ptr->fsel << 4);
+
+ p1 = readl(&prcm_base->clksel1_pll);
+ /* M2 (CORE_DPLL_CLKOUT_DIV): CM_CLKSEL1_PLL[27:31] */
+ clrsetbits_le32(&p1, 0xF8000000, ptr->m2 << 27);
+ /* M (CORE_DPLL_MULT): CM_CLKSEL1_PLL[16:26] */
+ clrsetbits_le32(&p1, 0x07FF0000, ptr->m << 16);
+ /* N (CORE_DPLL_DIV): CM_CLKSEL1_PLL[8:14] */
+ clrsetbits_le32(&p1, 0x00007F00, ptr->n << 8);
+ /* Source is the CM_96M_FCLK: CM_CLKSEL1_PLL[6] */
+ clrbits_le32(&p1, 0x00000040);
+
+ p2 = readl(&prcm_base->clksel_core);
+ /* SSI */
+ clrsetbits_le32(&p2, 0x00000F00, CORE_SSI_DIV << 8);
+ /* FSUSB */
+ clrsetbits_le32(&p2, 0x00000030, CORE_FUSB_DIV << 4);
+ /* L4 */
+ clrsetbits_le32(&p2, 0x0000000C, CORE_L4_DIV << 2);
+ /* L3 */
+ clrsetbits_le32(&p2, 0x00000003, CORE_L3_DIV);
+
+ p3 = (u32)&prcm_base->idlest_ckgen;
+
+ (*f_lock_pll) (p0, p1, p2, p3);
+ }
+}
+
+static void dpll4_init_36xx(u32 sil_index, u32 clk_index)
+{
+ struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
+ struct dpll_per_36x_param *ptr;
+
+ ptr = (struct dpll_per_36x_param *)get_36x_per_dpll_param();
+
+ /* Moving it to the right sysclk base */
+ ptr += clk_index;
+
+ /* EN_PERIPH_DPLL: CM_CLKEN_PLL[16:18] */
+ clrsetbits_le32(&prcm_base->clken_pll, 0x00070000, PLL_STOP << 16);
+ wait_on_value(ST_PERIPH_CLK, 0, &prcm_base->idlest_ckgen, LDELAY);
+
+ /* M6 (DIV_DPLL4): CM_CLKSEL1_EMU[24:29] */
+ clrsetbits_le32(&prcm_base->clksel1_emu, 0x3F000000, ptr->m6 << 24);
+
+ /* M5 (CLKSEL_CAM): CM_CLKSEL1_EMU[0:5] */
+ clrsetbits_le32(&prcm_base->clksel_cam, 0x0000003F, ptr->m5);
+
+ /* M4 (CLKSEL_DSS1): CM_CLKSEL_DSS[0:5] */
+ clrsetbits_le32(&prcm_base->clksel_dss, 0x0000003F, ptr->m4);
+
+ /* M3 (CLKSEL_DSS1): CM_CLKSEL_DSS[8:13] */
+ clrsetbits_le32(&prcm_base->clksel_dss, 0x00003F00, ptr->m3 << 8);
+
+ /* M2 (DIV_96M): CM_CLKSEL3_PLL[0:4] */
+ clrsetbits_le32(&prcm_base->clksel3_pll, 0x0000001F, ptr->m2);
+
+ /* M (PERIPH_DPLL_MULT): CM_CLKSEL2_PLL[8:19] */
+ clrsetbits_le32(&prcm_base->clksel2_pll, 0x000FFF00, ptr->m << 8);
+
+ /* N (PERIPH_DPLL_DIV): CM_CLKSEL2_PLL[0:6] */
+ clrsetbits_le32(&prcm_base->clksel2_pll, 0x0000007F, ptr->n);
+
+ /* M2DIV (CLKSEL_96M): CM_CLKSEL_CORE[12:13] */
+ clrsetbits_le32(&prcm_base->clksel_core, 0x00003000, ptr->m2div << 12);
+
+ /* LOCK MODE (EN_PERIPH_DPLL): CM_CLKEN_PLL[16:18] */
+ clrsetbits_le32(&prcm_base->clken_pll, 0x00070000, PLL_LOCK << 16);
+ wait_on_value(ST_PERIPH_CLK, 2, &prcm_base->idlest_ckgen, LDELAY);
+}
+
+static void dpll5_init_36xx(u32 sil_index, u32 clk_index)
+{
+ struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
+ dpll_param *ptr = (dpll_param *) get_36x_per2_dpll_param();
+
+ /* Moving it to the right sysclk base */
+ ptr = ptr + clk_index;
+
+ /* PER2 DPLL (DPLL5) */
+ clrsetbits_le32(&prcm_base->clken2_pll, 0x00000007, PLL_STOP);
+ wait_on_value(1, 0, &prcm_base->idlest2_ckgen, LDELAY);
+ /* set M2 (usbtll_fck) */
+ clrsetbits_le32(&prcm_base->clksel5_pll, 0x0000001F, ptr->m2);
+ /* set m (11-bit multiplier) */
+ clrsetbits_le32(&prcm_base->clksel4_pll, 0x0007FF00, ptr->m << 8);
+ /* set n (7-bit divider)*/
+ clrsetbits_le32(&prcm_base->clksel4_pll, 0x0000007F, ptr->n);
+ /* lock mode */
+ clrsetbits_le32(&prcm_base->clken2_pll, 0x00000007, PLL_LOCK);
+ wait_on_value(1, 1, &prcm_base->idlest2_ckgen, LDELAY);
+}
+
+static void mpu_init_36xx(u32 sil_index, u32 clk_index)
+{
+ struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
+ dpll_param *ptr = (dpll_param *) get_36x_mpu_dpll_param();
+
+ /* Moving to the right sysclk */
+ ptr += clk_index;
+
+ /* MPU DPLL (unlocked already */
+
+ /* M2 (MPU_DPLL_CLKOUT_DIV) : CM_CLKSEL2_PLL_MPU[0:4] */
+ clrsetbits_le32(&prcm_base->clksel2_pll_mpu, 0x0000001F, ptr->m2);
+
+ /* M (MPU_DPLL_MULT) : CM_CLKSEL2_PLL_MPU[8:18] */
+ clrsetbits_le32(&prcm_base->clksel1_pll_mpu, 0x0007FF00, ptr->m << 8);
+
+ /* N (MPU_DPLL_DIV) : CM_CLKSEL2_PLL_MPU[0:6] */
+ clrsetbits_le32(&prcm_base->clksel1_pll_mpu, 0x0000007F, ptr->n);
+}
+
+static void iva_init_36xx(u32 sil_index, u32 clk_index)
+{
+ struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
+ dpll_param *ptr = (dpll_param *)get_36x_iva_dpll_param();
+
+ /* Moving to the right sysclk */
+ ptr += clk_index;
+
+ /* IVA DPLL */
+ /* EN_IVA2_DPLL : CM_CLKEN_PLL_IVA2[0:2] */
+ clrsetbits_le32(&prcm_base->clken_pll_iva2, 0x00000007, PLL_STOP);
+ wait_on_value(ST_IVA2_CLK, 0, &prcm_base->idlest_pll_iva2, LDELAY);
+
+ /* M2 (IVA2_DPLL_CLKOUT_DIV) : CM_CLKSEL2_PLL_IVA2[0:4] */
+ clrsetbits_le32(&prcm_base->clksel2_pll_iva2, 0x0000001F, ptr->m2);
+
+ /* M (IVA2_DPLL_MULT) : CM_CLKSEL1_PLL_IVA2[8:18] */
+ clrsetbits_le32(&prcm_base->clksel1_pll_iva2, 0x0007FF00, ptr->m << 8);
+
+ /* N (IVA2_DPLL_DIV) : CM_CLKSEL1_PLL_IVA2[0:6] */
+ clrsetbits_le32(&prcm_base->clksel1_pll_iva2, 0x0000007F, ptr->n);
+
+ /* LOCK (MODE (EN_IVA2_DPLL) : CM_CLKEN_PLL_IVA2[0:2] */
+ clrsetbits_le32(&prcm_base->clken_pll_iva2, 0x00000007, PLL_LOCK);
+
+ wait_on_value(ST_IVA2_CLK, 1, &prcm_base->idlest_pll_iva2, LDELAY);
+}
+
+/******************************************************************************
+ * prcm_init() - inits clocks for PRCM as defined in clocks.h
+ * called from SRAM, or Flash (using temp SRAM stack).
+ *****************************************************************************/
+void prcm_init(void)
+{
+ u32 osc_clk = 0, sys_clkin_sel;
+ u32 clk_index, sil_index = 0;
+ struct prm *prm_base = (struct prm *)PRM_BASE;
+ struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
+
+ /*
+ * Gauge the input clock speed and find out the sys_clkin_sel
+ * value corresponding to the input clock.
+ */
+ osc_clk = get_osc_clk_speed();
+ get_sys_clkin_sel(osc_clk, &sys_clkin_sel);
+
+ /* set input crystal speed */
+ clrsetbits_le32(&prm_base->clksel, 0x00000007, sys_clkin_sel);
+
+ /* If the input clock is greater than 19.2M always divide/2 */
+ if (sys_clkin_sel > 2) {
+ /* input clock divider */
+ clrsetbits_le32(&prm_base->clksrc_ctrl, 0x000000C0, 2 << 6);
+ clk_index = sys_clkin_sel / 2;
+ } else {
+ /* input clock divider */
+ clrsetbits_le32(&prm_base->clksrc_ctrl, 0x000000C0, 1 << 6);
+ clk_index = sys_clkin_sel;
+ }
+
+ if (get_cpu_family() == CPU_OMAP36XX) {
+ /*
+ * In warm reset conditions on OMAP36xx/AM/DM37xx
+ * the rom code incorrectly sets the DPLL4 clock
+ * input divider to /6.5. Section 3.5.3.3.3.2.1 of
+ * the AM/DM37x TRM explains that the /6.5 divider
+ * is used only when the input clock is 13MHz.
+ *
+ * If the part is in this cpu family *and* the input
+ * clock *is not* 13 MHz, then reset the DPLL4 clock
+ * input divider to /1 as it should never set to /6.5
+ * in this case.
+ */
+ if (sys_clkin_sel != 1) { /* 13 MHz */
+ /* Bit 8: DPLL4_CLKINP_DIV */
+ clrbits_le32(&prm_base->clksrc_ctrl, 0x00000100);
+ }
+
+ /* Unlock MPU DPLL (slows things down, and needed later) */
+ clrsetbits_le32(&prcm_base->clken_pll_mpu,
+ 0x00000007, PLL_LOW_POWER_BYPASS);
+ wait_on_value(ST_MPU_CLK, 0, &prcm_base->idlest_pll_mpu,
+ LDELAY);
+
+ dpll3_init_36xx(0, clk_index);
+ dpll4_init_36xx(0, clk_index);
+ dpll5_init_36xx(0, clk_index);
+ iva_init_36xx(0, clk_index);
+ mpu_init_36xx(0, clk_index);
+
+ /* Lock MPU DPLL to set frequency */
+ clrsetbits_le32(&prcm_base->clken_pll_mpu,
+ 0x00000007, PLL_LOCK);
+ wait_on_value(ST_MPU_CLK, 1, &prcm_base->idlest_pll_mpu,
+ LDELAY);
+ } else {
+ /*
+ * The DPLL tables are defined according to sysclk value and
+ * silicon revision. The clk_index value will be used to get
+ * the values for that input sysclk from the DPLL param table
+ * and sil_index will get the values for that SysClk for the
+ * appropriate silicon rev.
+ */
+ if (((get_cpu_family() == CPU_OMAP34XX)
+ && (get_cpu_rev() >= CPU_3XX_ES20)) ||
+ (get_cpu_family() == CPU_AM35XX))
+ sil_index = 1;
+
+ /* Unlock MPU DPLL (slows things down, and needed later) */
+ clrsetbits_le32(&prcm_base->clken_pll_mpu,
+ 0x00000007, PLL_LOW_POWER_BYPASS);
+ wait_on_value(ST_MPU_CLK, 0, &prcm_base->idlest_pll_mpu,
+ LDELAY);
+
+ dpll3_init_34xx(sil_index, clk_index);
+ dpll4_init_34xx(sil_index, clk_index);
+ dpll5_init_34xx(sil_index, clk_index);
+ if (get_cpu_family() != CPU_AM35XX)
+ iva_init_34xx(sil_index, clk_index);
+
+ mpu_init_34xx(sil_index, clk_index);
+
+ /* Lock MPU DPLL to set frequency */
+ clrsetbits_le32(&prcm_base->clken_pll_mpu,
+ 0x00000007, PLL_LOCK);
+ wait_on_value(ST_MPU_CLK, 1, &prcm_base->idlest_pll_mpu,
+ LDELAY);
+ }
+
+ /* Set up GPTimers to sys_clk source only */
+ setbits_le32(&prcm_base->clksel_per, 0x000000FF);
+ setbits_le32(&prcm_base->clksel_wkup, 1);
+
+ sdelay(5000);
+}
+
+/*
+ * Enable usb ehci uhh, tll clocks
+ */
+void ehci_clocks_enable(void)
+{
+ struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
+
+ /* Enable USBHOST_L3_ICLK (USBHOST_MICLK) */
+ setbits_le32(&prcm_base->iclken_usbhost, 1);
+ /*
+ * Enable USBHOST_48M_FCLK (USBHOST_FCLK1)
+ * and USBHOST_120M_FCLK (USBHOST_FCLK2)
+ */
+ setbits_le32(&prcm_base->fclken_usbhost, 0x00000003);
+ /* Enable USBTTL_ICLK */
+ setbits_le32(&prcm_base->iclken3_core, 0x00000004);
+ /* Enable USBTTL_FCLK */
+ setbits_le32(&prcm_base->fclken3_core, 0x00000004);
+}
+
+/******************************************************************************
+ * peripheral_enable() - Enable the clks & power for perifs (GPT2, UART1,...)
+ *****************************************************************************/
+void per_clocks_enable(void)
+{
+ struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
+
+ /* Enable GP2 timer. */
+ setbits_le32(&prcm_base->clksel_per, 0x01); /* GPT2 = sys clk */
+ setbits_le32(&prcm_base->iclken_per, 0x08); /* ICKen GPT2 */
+ setbits_le32(&prcm_base->fclken_per, 0x08); /* FCKen GPT2 */
+
+ /* Enable GP9 timer. */
+ setbits_le32(&prcm_base->clksel_per, 0x80); /* GPT9 = 32kHz clk */
+ setbits_le32(&prcm_base->iclken_per, 0x400); /* ICKen GPT9 */
+ setbits_le32(&prcm_base->fclken_per, 0x400); /* FCKen GPT9 */
+
+#ifdef CONFIG_SYS_NS16550
+ /* Enable UART1 clocks */
+ setbits_le32(&prcm_base->fclken1_core, 0x00002000);
+ setbits_le32(&prcm_base->iclken1_core, 0x00002000);
+
+ /* Enable UART2 clocks */
+ setbits_le32(&prcm_base->fclken1_core, 0x00004000);
+ setbits_le32(&prcm_base->iclken1_core, 0x00004000);
+
+ /* UART 3 Clocks */
+ setbits_le32(&prcm_base->fclken_per, 0x00000800);
+ setbits_le32(&prcm_base->iclken_per, 0x00000800);
+#endif
+
+#ifdef CONFIG_OMAP3_GPIO_2
+ setbits_le32(&prcm_base->fclken_per, 0x00002000);
+ setbits_le32(&prcm_base->iclken_per, 0x00002000);
+#endif
+#ifdef CONFIG_OMAP3_GPIO_3
+ setbits_le32(&prcm_base->fclken_per, 0x00004000);
+ setbits_le32(&prcm_base->iclken_per, 0x00004000);
+#endif
+#ifdef CONFIG_OMAP3_GPIO_4
+ setbits_le32(&prcm_base->fclken_per, 0x00008000);
+ setbits_le32(&prcm_base->iclken_per, 0x00008000);
+#endif
+#ifdef CONFIG_OMAP3_GPIO_5
+ setbits_le32(&prcm_base->fclken_per, 0x00010000);
+ setbits_le32(&prcm_base->iclken_per, 0x00010000);
+#endif
+#ifdef CONFIG_OMAP3_GPIO_6
+ setbits_le32(&prcm_base->fclken_per, 0x00020000);
+ setbits_le32(&prcm_base->iclken_per, 0x00020000);
+#endif
+
+#ifdef CONFIG_SYS_I2C_OMAP34XX
+ /* Turn on all 3 I2C clocks */
+ setbits_le32(&prcm_base->fclken1_core, 0x00038000);
+ setbits_le32(&prcm_base->iclken1_core, 0x00038000); /* I2C1,2,3 = on */
+#endif
+ /* Enable the ICLK for 32K Sync Timer as its used in udelay */
+ setbits_le32(&prcm_base->iclken_wkup, 0x00000004);
+
+ if (get_cpu_family() != CPU_AM35XX)
+ out_le32(&prcm_base->fclken_iva2, FCK_IVA2_ON);
+
+ out_le32(&prcm_base->fclken1_core, FCK_CORE1_ON);
+ out_le32(&prcm_base->iclken1_core, ICK_CORE1_ON);
+ out_le32(&prcm_base->iclken2_core, ICK_CORE2_ON);
+ out_le32(&prcm_base->fclken_wkup, FCK_WKUP_ON);
+ out_le32(&prcm_base->iclken_wkup, ICK_WKUP_ON);
+ out_le32(&prcm_base->fclken_dss, FCK_DSS_ON);
+ out_le32(&prcm_base->iclken_dss, ICK_DSS_ON);
+ if (get_cpu_family() != CPU_AM35XX) {
+ out_le32(&prcm_base->fclken_cam, FCK_CAM_ON);
+ out_le32(&prcm_base->iclken_cam, ICK_CAM_ON);
+ }
+
+ sdelay(1000);
+}
generated by cgit v0.10.2 at 2024-07-26 16:51:03 (GMT)