am33xx: refactor am33xx clocks and add ti814x support
Split clock.c for am335x and ti814x and add ti814x specific
clock support.
Signed-off-by: Matt Porter <mporter@ti.com>
diff --git a/arch/arm/cpu/armv7/am33xx/clock_ti814x.c b/arch/arm/cpu/armv7/am33xx/clock_ti814x.c
new file mode 100644
index 0000000..cb4210f
--- /dev/null
+++ b/arch/arm/cpu/armv7/am33xx/clock_ti814x.c
@@ -0,0 +1,406 @@
+/*
+ * clock_ti814x.c
+ *
+ * Clocks for TI814X based boards
+ *
+ * Copyright (C) 2013, Texas Instruments, Incorporated
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR /PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <common.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/hardware.h>
+#include <asm/io.h>
+
+/* PRCM */
+#define PRCM_MOD_EN 0x2
+
+/* CLK_SRC */
+#define OSC_SRC0 0
+#define OSC_SRC1 1
+
+#define L3_OSC_SRC OSC_SRC0
+
+#define OSC_0_FREQ 20
+
+#define DCO_HS2_MIN 500
+#define DCO_HS2_MAX 1000
+#define DCO_HS1_MIN 1000
+#define DCO_HS1_MAX 2000
+
+#define SELFREQDCO_HS2 0x00000801
+#define SELFREQDCO_HS1 0x00001001
+
+#define MPU_N 0x1
+#define MPU_M 0x3C
+#define MPU_M2 1
+#define MPU_CLKCTRL 0x1
+
+#define L3_N 19
+#define L3_M 880
+#define L3_M2 4
+#define L3_CLKCTRL 0x801
+
+#define DDR_N 19
+#define DDR_M 666
+#define DDR_M2 2
+#define DDR_CLKCTRL 0x801
+
+/* ADPLLJ register values */
+#define ADPLLJ_CLKCTRL_HS2 0x00000801 /* HS2 mode, TINT2 = 1 */
+#define ADPLLJ_CLKCTRL_HS1 0x00001001 /* HS1 mode, TINT2 = 1 */
+#define ADPLLJ_CLKCTRL_CLKDCOLDOEN (1 << 29)
+#define ADPLLJ_CLKCTRL_IDLE (1 << 23)
+#define ADPLLJ_CLKCTRL_CLKOUTEN (1 << 20)
+#define ADPLLJ_CLKCTRL_CLKOUTLDOEN (1 << 19)
+#define ADPLLJ_CLKCTRL_CLKDCOLDOPWDNZ (1 << 17)
+#define ADPLLJ_CLKCTRL_LPMODE (1 << 12)
+#define ADPLLJ_CLKCTRL_DRIFTGUARDIAN (1 << 11)
+#define ADPLLJ_CLKCTRL_REGM4XEN (1 << 10)
+#define ADPLLJ_CLKCTRL_TINITZ (1 << 0)
+#define ADPLLJ_CLKCTRL_CLKDCO (ADPLLJ_CLKCTRL_CLKDCOLDOEN | \
+ ADPLLJ_CLKCTRL_CLKOUTEN | \
+ ADPLLJ_CLKCTRL_CLKOUTLDOEN | \
+ ADPLLJ_CLKCTRL_CLKDCOLDOPWDNZ)
+
+#define ADPLLJ_STATUS_PHASELOCK (1 << 10)
+#define ADPLLJ_STATUS_FREQLOCK (1 << 9)
+#define ADPLLJ_STATUS_PHSFRQLOCK (ADPLLJ_STATUS_PHASELOCK | \
+ ADPLLJ_STATUS_FREQLOCK)
+#define ADPLLJ_STATUS_BYPASSACK (1 << 8)
+#define ADPLLJ_STATUS_BYPASS (1 << 0)
+#define ADPLLJ_STATUS_BYPASSANDACK (ADPLLJ_STATUS_BYPASSACK | \
+ ADPLLJ_STATUS_BYPASS)
+
+#define ADPLLJ_TENABLE_ENB (1 << 0)
+#define ADPLLJ_TENABLEDIV_ENB (1 << 0)
+
+#define ADPLLJ_M2NDIV_M2SHIFT 16
+
+#define MPU_PLL_BASE (PLL_SUBSYS_BASE + 0x048)
+#define L3_PLL_BASE (PLL_SUBSYS_BASE + 0x110)
+#define DDR_PLL_BASE (PLL_SUBSYS_BASE + 0x290)
+
+struct ad_pll {
+ unsigned int pwrctrl;
+ unsigned int clkctrl;
+ unsigned int tenable;
+ unsigned int tenablediv;
+ unsigned int m2ndiv;
+ unsigned int mn2div;
+ unsigned int fracdiv;
+ unsigned int bwctrl;
+ unsigned int fracctrl;
+ unsigned int status;
+ unsigned int m3div;
+ unsigned int rampctrl;
+};
+
+#define OSC_SRC_CTRL (PLL_SUBSYS_BASE + 0x2C0)
+
+/* PRCM */
+#define CM_DEFAULT_BASE (PRCM_BASE + 0x0500)
+
+struct cm_def {
+ unsigned int resv0[2];
+ unsigned int l3fastclkstctrl;
+ unsigned int resv1[1];
+ unsigned int pciclkstctrl;
+ unsigned int resv2[1];
+ unsigned int ducaticlkstctrl;
+ unsigned int resv3[1];
+ unsigned int emif0clkctrl;
+ unsigned int emif1clkctrl;
+ unsigned int dmmclkctrl;
+ unsigned int fwclkctrl;
+ unsigned int resv4[10];
+ unsigned int usbclkctrl;
+ unsigned int resv5[1];
+ unsigned int sataclkctrl;
+ unsigned int resv6[4];
+ unsigned int ducaticlkctrl;
+ unsigned int pciclkctrl;
+};
+
+#define CM_ALWON_BASE (PRCM_BASE + 0x1400)
+
+struct cm_alwon {
+ unsigned int l3slowclkstctrl;
+ unsigned int ethclkstctrl;
+ unsigned int l3medclkstctrl;
+ unsigned int mmu_clkstctrl;
+ unsigned int mmucfg_clkstctrl;
+ unsigned int ocmc0clkstctrl;
+ unsigned int vcpclkstctrl;
+ unsigned int mpuclkstctrl;
+ unsigned int sysclk4clkstctrl;
+ unsigned int sysclk5clkstctrl;
+ unsigned int sysclk6clkstctrl;
+ unsigned int rtcclkstctrl;
+ unsigned int l3fastclkstctrl;
+ unsigned int resv0[67];
+ unsigned int mcasp0clkctrl;
+ unsigned int mcasp1clkctrl;
+ unsigned int mcasp2clkctrl;
+ unsigned int mcbspclkctrl;
+ unsigned int uart0clkctrl;
+ unsigned int uart1clkctrl;
+ unsigned int uart2clkctrl;
+ unsigned int gpio0clkctrl;
+ unsigned int gpio1clkctrl;
+ unsigned int i2c0clkctrl;
+ unsigned int i2c1clkctrl;
+ unsigned int mcasp345clkctrl;
+ unsigned int atlclkctrl;
+ unsigned int mlbclkctrl;
+ unsigned int pataclkctrl;
+ unsigned int resv1[1];
+ unsigned int uart3clkctrl;
+ unsigned int uart4clkctrl;
+ unsigned int uart5clkctrl;
+ unsigned int wdtimerclkctrl;
+ unsigned int spiclkctrl;
+ unsigned int mailboxclkctrl;
+ unsigned int spinboxclkctrl;
+ unsigned int mmudataclkctrl;
+ unsigned int resv2[2];
+ unsigned int mmucfgclkctrl;
+ unsigned int resv3[2];
+ unsigned int ocmc0clkctrl;
+ unsigned int vcpclkctrl;
+ unsigned int resv4[2];
+ unsigned int controlclkctrl;
+ unsigned int resv5[2];
+ unsigned int gpmcclkctrl;
+ unsigned int ethernet0clkctrl;
+ unsigned int resv6[1];
+ unsigned int mpuclkctrl;
+ unsigned int debugssclkctrl;
+ unsigned int l3clkctrl;
+ unsigned int l4hsclkctrl;
+ unsigned int l4lsclkctrl;
+ unsigned int rtcclkctrl;
+ unsigned int tpccclkctrl;
+ unsigned int tptc0clkctrl;
+ unsigned int tptc1clkctrl;
+ unsigned int tptc2clkctrl;
+ unsigned int tptc3clkctrl;
+ unsigned int resv7[4];
+ unsigned int dcan01clkctrl;
+ unsigned int mmchs0clkctrl;
+ unsigned int mmchs1clkctrl;
+ unsigned int mmchs2clkctrl;
+ unsigned int custefuseclkctrl;
+};
+
+
+const struct cm_alwon *cmalwon = (struct cm_alwon *)CM_ALWON_BASE;
+const struct cm_def *cmdef = (struct cm_def *)CM_DEFAULT_BASE;
+
+/*
+ * Enable the peripheral clock for required peripherals
+ */
+static void enable_per_clocks(void)
+{
+ /* UART0 */
+ writel(PRCM_MOD_EN, &cmalwon->uart0clkctrl);
+ while (readl(&cmalwon->uart0clkctrl) != PRCM_MOD_EN)
+ ;
+
+ /* HSMMC1 */
+ writel(PRCM_MOD_EN, &cmalwon->mmchs1clkctrl);
+ while (readl(&cmalwon->mmchs1clkctrl) != PRCM_MOD_EN)
+ ;
+}
+
+/*
+ * select the HS1 or HS2 for DCO Freq
+ * return : CLKCTRL
+ */
+static u32 pll_dco_freq_sel(u32 clkout_dco)
+{
+ if (clkout_dco >= DCO_HS2_MIN && clkout_dco < DCO_HS2_MAX)
+ return SELFREQDCO_HS2;
+ else if (clkout_dco >= DCO_HS1_MIN && clkout_dco < DCO_HS1_MAX)
+ return SELFREQDCO_HS1;
+ else
+ return -1;
+}
+
+/*
+ * select the sigma delta config
+ * return: sigma delta val
+ */
+static u32 pll_sigma_delta_val(u32 clkout_dco)
+{
+ u32 sig_val = 0;
+ float frac_div;
+
+ frac_div = (float) clkout_dco / 250;
+ frac_div = frac_div + 0.90;
+ sig_val = (int)frac_div;
+ sig_val = sig_val << 24;
+
+ return sig_val;
+}
+
+/*
+ * configure individual ADPLLJ
+ */
+static void pll_config(u32 base, u32 n, u32 m, u32 m2,
+ u32 clkctrl_val, int adpllj)
+{
+ const struct ad_pll *adpll = (struct ad_pll *)base;
+ u32 m2nval, mn2val, read_clkctrl = 0, clkout_dco = 0;
+ u32 sig_val = 0, hs_mod = 0;
+
+ m2nval = (m2 << ADPLLJ_M2NDIV_M2SHIFT) | n;
+ mn2val = m;
+
+ /* calculate clkout_dco */
+ clkout_dco = ((OSC_0_FREQ / (n+1)) * m);
+
+ /* sigma delta & Hs mode selection skip for ADPLLS*/
+ if (adpllj) {
+ sig_val = pll_sigma_delta_val(clkout_dco);
+ hs_mod = pll_dco_freq_sel(clkout_dco);
+ }
+
+ /* by-pass pll */
+ read_clkctrl = readl(&adpll->clkctrl);
+ writel((read_clkctrl | ADPLLJ_CLKCTRL_IDLE), &adpll->clkctrl);
+ while ((readl(&adpll->status) & ADPLLJ_STATUS_BYPASSANDACK)
+ != ADPLLJ_STATUS_BYPASSANDACK)
+ ;
+
+ /* clear TINITZ */
+ read_clkctrl = readl(&adpll->clkctrl);
+ writel((read_clkctrl & ~ADPLLJ_CLKCTRL_TINITZ), &adpll->clkctrl);
+
+ /*
+ * ref_clk = 20/(n + 1);
+ * clkout_dco = ref_clk * m;
+ * clk_out = clkout_dco/m2;
+ */
+ read_clkctrl = readl(&adpll->clkctrl) &
+ ~(ADPLLJ_CLKCTRL_LPMODE |
+ ADPLLJ_CLKCTRL_DRIFTGUARDIAN |
+ ADPLLJ_CLKCTRL_REGM4XEN);
+ writel(m2nval, &adpll->m2ndiv);
+ writel(mn2val, &adpll->mn2div);
+
+ /* Skip for modena(ADPLLS) */
+ if (adpllj) {
+ writel(sig_val, &adpll->fracdiv);
+ writel((read_clkctrl | hs_mod), &adpll->clkctrl);
+ }
+
+ /* Load M2, N2 dividers of ADPLL */
+ writel(ADPLLJ_TENABLEDIV_ENB, &adpll->tenablediv);
+ writel(~ADPLLJ_TENABLEDIV_ENB, &adpll->tenablediv);
+
+ /* Load M, N dividers of ADPLL */
+ writel(ADPLLJ_TENABLE_ENB, &adpll->tenable);
+ writel(~ADPLLJ_TENABLE_ENB, &adpll->tenable);
+
+ /* Configure CLKDCOLDOEN,CLKOUTLDOEN,CLKOUT Enable BITS */
+ read_clkctrl = readl(&adpll->clkctrl) & ~ADPLLJ_CLKCTRL_CLKDCO;
+ if (adpllj)
+ writel((read_clkctrl | ADPLLJ_CLKCTRL_CLKDCO),
+ &adpll->clkctrl);
+
+ /* Enable TINTZ and disable IDLE(PLL in Active & Locked Mode */
+ read_clkctrl = readl(&adpll->clkctrl) & ~ADPLLJ_CLKCTRL_IDLE;
+ writel((read_clkctrl | ADPLLJ_CLKCTRL_TINITZ), &adpll->clkctrl);
+
+ /* Wait for phase and freq lock */
+ while ((readl(&adpll->status) & ADPLLJ_STATUS_PHSFRQLOCK) !=
+ ADPLLJ_STATUS_PHSFRQLOCK)
+ ;
+}
+
+static void unlock_pll_control_mmr(void)
+{
+ /* TRM 2.10.1.4 and 3.2.7-3.2.11 */
+ writel(0x1EDA4C3D, 0x481C5040);
+ writel(0x2FF1AC2B, 0x48140060);
+ writel(0xF757FDC0, 0x48140064);
+ writel(0xE2BC3A6D, 0x48140068);
+ writel(0x1EBF131D, 0x4814006c);
+ writel(0x6F361E05, 0x48140070);
+}
+
+static void mpu_pll_config(void)
+{
+ pll_config(MPU_PLL_BASE, MPU_N, MPU_M, MPU_M2, MPU_CLKCTRL, 0);
+}
+
+static void l3_pll_config(void)
+{
+ u32 l3_osc_src, rd_osc_src = 0;
+
+ l3_osc_src = L3_OSC_SRC;
+ rd_osc_src = readl(OSC_SRC_CTRL);
+
+ if (OSC_SRC0 == l3_osc_src)
+ writel((rd_osc_src & 0xfffffffe)|0x0, OSC_SRC_CTRL);
+ else
+ writel((rd_osc_src & 0xfffffffe)|0x1, OSC_SRC_CTRL);
+
+ pll_config(L3_PLL_BASE, L3_N, L3_M, L3_M2, L3_CLKCTRL, 1);
+}
+
+void ddr_pll_config(unsigned int ddrpll_m)
+{
+ pll_config(DDR_PLL_BASE, DDR_N, DDR_M, DDR_M2, DDR_CLKCTRL, 1);
+}
+
+void enable_emif_clocks(void) {};
+
+void enable_dmm_clocks(void)
+{
+ writel(PRCM_MOD_EN, &cmdef->fwclkctrl);
+ writel(PRCM_MOD_EN, &cmdef->l3fastclkstctrl);
+ writel(PRCM_MOD_EN, &cmdef->emif0clkctrl);
+ while ((readl(&cmdef->emif0clkctrl)) != PRCM_MOD_EN)
+ ;
+ writel(PRCM_MOD_EN, &cmdef->emif1clkctrl);
+ while ((readl(&cmdef->emif1clkctrl)) != PRCM_MOD_EN)
+ ;
+ while ((readl(&cmdef->l3fastclkstctrl) & 0x300) != 0x300)
+ ;
+ writel(PRCM_MOD_EN, &cmdef->dmmclkctrl);
+ while ((readl(&cmdef->dmmclkctrl)) != PRCM_MOD_EN)
+ ;
+ writel(PRCM_MOD_EN, &cmalwon->l3slowclkstctrl);
+ while ((readl(&cmalwon->l3slowclkstctrl) & 0x2100) != 0x2100)
+ ;
+}
+
+/*
+ * Configure the PLL/PRCM for necessary peripherals
+ */
+void pll_init()
+{
+ unlock_pll_control_mmr();
+
+ /* Enable the control module */
+ writel(PRCM_MOD_EN, &cmalwon->controlclkctrl);
+
+ mpu_pll_config();
+
+ l3_pll_config();
+
+ /* Enable the required peripherals */
+ enable_per_clocks();
+}