arm: socfpga: stratix10: Add clock manager driver for Stratix10 SoC
Add Clock Manager driver support for Stratix SoC
Signed-off-by: Chin Liang See <chin.liang.see@intel.com>
Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
diff --git a/arch/arm/mach-socfpga/clock_manager_s10.c b/arch/arm/mach-socfpga/clock_manager_s10.c
new file mode 100644
index 0000000..3ba2a00
--- /dev/null
+++ b/arch/arm/mach-socfpga/clock_manager_s10.c
@@ -0,0 +1,380 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2016-2018 Intel Corporation <www.intel.com>
+ *
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/clock_manager.h>
+#include <asm/arch/handoff_s10.h>
+#include <asm/arch/system_manager.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static const struct socfpga_clock_manager *clock_manager_base =
+ (struct socfpga_clock_manager *)SOCFPGA_CLKMGR_ADDRESS;
+static const struct socfpga_system_manager *sysmgr_regs =
+ (struct socfpga_system_manager *)SOCFPGA_SYSMGR_ADDRESS;
+
+/*
+ * function to write the bypass register which requires a poll of the
+ * busy bit
+ */
+static void cm_write_bypass_mainpll(u32 val)
+{
+ writel(val, &clock_manager_base->main_pll.bypass);
+ cm_wait_for_fsm();
+}
+
+static void cm_write_bypass_perpll(u32 val)
+{
+ writel(val, &clock_manager_base->per_pll.bypass);
+ cm_wait_for_fsm();
+}
+
+/* function to write the ctrl register which requires a poll of the busy bit */
+static void cm_write_ctrl(u32 val)
+{
+ writel(val, &clock_manager_base->ctrl);
+ cm_wait_for_fsm();
+}
+
+/*
+ * Setup clocks while making no assumptions about previous state of the clocks.
+ */
+void cm_basic_init(const struct cm_config * const cfg)
+{
+ u32 mdiv, refclkdiv, mscnt, hscnt, vcocalib;
+
+ if (cfg == 0)
+ return;
+
+ /* Put all plls in bypass */
+ cm_write_bypass_mainpll(CLKMGR_BYPASS_MAINPLL_ALL);
+ cm_write_bypass_perpll(CLKMGR_BYPASS_PERPLL_ALL);
+
+ /* setup main PLL dividers where calculate the vcocalib value */
+ mdiv = (cfg->main_pll_fdbck >> CLKMGR_FDBCK_MDIV_OFFSET) &
+ CLKMGR_FDBCK_MDIV_MASK;
+ refclkdiv = (cfg->main_pll_pllglob >> CLKMGR_PLLGLOB_REFCLKDIV_OFFSET) &
+ CLKMGR_PLLGLOB_REFCLKDIV_MASK;
+ mscnt = CLKMGR_MSCNT_CONST / (CLKMGR_MDIV_CONST + mdiv) / refclkdiv;
+ hscnt = (mdiv + CLKMGR_MDIV_CONST) * mscnt / refclkdiv -
+ CLKMGR_HSCNT_CONST;
+ vcocalib = (hscnt & CLKMGR_VCOCALIB_HSCNT_MASK) |
+ ((mscnt & CLKMGR_VCOCALIB_MSCNT_MASK) <<
+ CLKMGR_VCOCALIB_MSCNT_OFFSET);
+
+ writel((cfg->main_pll_pllglob & ~CLKMGR_PLLGLOB_PD_MASK &
+ ~CLKMGR_PLLGLOB_RST_MASK),
+ &clock_manager_base->main_pll.pllglob);
+ writel(cfg->main_pll_fdbck, &clock_manager_base->main_pll.fdbck);
+ writel(vcocalib, &clock_manager_base->main_pll.vcocalib);
+ writel(cfg->main_pll_pllc0, &clock_manager_base->main_pll.pllc0);
+ writel(cfg->main_pll_pllc1, &clock_manager_base->main_pll.pllc1);
+ writel(cfg->main_pll_nocdiv, &clock_manager_base->main_pll.nocdiv);
+
+ /* setup peripheral PLL dividers */
+ /* calculate the vcocalib value */
+ mdiv = (cfg->per_pll_fdbck >> CLKMGR_FDBCK_MDIV_OFFSET) &
+ CLKMGR_FDBCK_MDIV_MASK;
+ refclkdiv = (cfg->per_pll_pllglob >> CLKMGR_PLLGLOB_REFCLKDIV_OFFSET) &
+ CLKMGR_PLLGLOB_REFCLKDIV_MASK;
+ mscnt = CLKMGR_MSCNT_CONST / (CLKMGR_MDIV_CONST + mdiv) / refclkdiv;
+ hscnt = (mdiv + CLKMGR_MDIV_CONST) * mscnt / refclkdiv -
+ CLKMGR_HSCNT_CONST;
+ vcocalib = (hscnt & CLKMGR_VCOCALIB_HSCNT_MASK) |
+ ((mscnt & CLKMGR_VCOCALIB_MSCNT_MASK) <<
+ CLKMGR_VCOCALIB_MSCNT_OFFSET);
+
+ writel((cfg->per_pll_pllglob & ~CLKMGR_PLLGLOB_PD_MASK &
+ ~CLKMGR_PLLGLOB_RST_MASK),
+ &clock_manager_base->per_pll.pllglob);
+ writel(cfg->per_pll_fdbck, &clock_manager_base->per_pll.fdbck);
+ writel(vcocalib, &clock_manager_base->per_pll.vcocalib);
+ writel(cfg->per_pll_pllc0, &clock_manager_base->per_pll.pllc0);
+ writel(cfg->per_pll_pllc1, &clock_manager_base->per_pll.pllc1);
+ writel(cfg->per_pll_emacctl, &clock_manager_base->per_pll.emacctl);
+ writel(cfg->per_pll_gpiodiv, &clock_manager_base->per_pll.gpiodiv);
+
+ /* Take both PLL out of reset and power up */
+ setbits_le32(&clock_manager_base->main_pll.pllglob,
+ CLKMGR_PLLGLOB_PD_MASK | CLKMGR_PLLGLOB_RST_MASK);
+ setbits_le32(&clock_manager_base->per_pll.pllglob,
+ CLKMGR_PLLGLOB_PD_MASK | CLKMGR_PLLGLOB_RST_MASK);
+
+#define LOCKED_MASK \
+ (CLKMGR_STAT_MAINPLL_LOCKED | \
+ CLKMGR_STAT_PERPLL_LOCKED)
+
+ cm_wait_for_lock(LOCKED_MASK);
+
+ /*
+ * Dividers for C2 to C9 only init after PLLs are lock. As dividers
+ * only take effect upon value change, we shall set a maximum value as
+ * default value.
+ */
+ writel(0xff, &clock_manager_base->main_pll.mpuclk);
+ writel(0xff, &clock_manager_base->main_pll.nocclk);
+ writel(0xff, &clock_manager_base->main_pll.cntr2clk);
+ writel(0xff, &clock_manager_base->main_pll.cntr3clk);
+ writel(0xff, &clock_manager_base->main_pll.cntr4clk);
+ writel(0xff, &clock_manager_base->main_pll.cntr5clk);
+ writel(0xff, &clock_manager_base->main_pll.cntr6clk);
+ writel(0xff, &clock_manager_base->main_pll.cntr7clk);
+ writel(0xff, &clock_manager_base->main_pll.cntr8clk);
+ writel(0xff, &clock_manager_base->main_pll.cntr9clk);
+ writel(0xff, &clock_manager_base->per_pll.cntr2clk);
+ writel(0xff, &clock_manager_base->per_pll.cntr3clk);
+ writel(0xff, &clock_manager_base->per_pll.cntr4clk);
+ writel(0xff, &clock_manager_base->per_pll.cntr5clk);
+ writel(0xff, &clock_manager_base->per_pll.cntr6clk);
+ writel(0xff, &clock_manager_base->per_pll.cntr7clk);
+ writel(0xff, &clock_manager_base->per_pll.cntr8clk);
+ writel(0xff, &clock_manager_base->per_pll.cntr9clk);
+
+ writel(cfg->main_pll_mpuclk, &clock_manager_base->main_pll.mpuclk);
+ writel(cfg->main_pll_nocclk, &clock_manager_base->main_pll.nocclk);
+ writel(cfg->main_pll_cntr2clk, &clock_manager_base->main_pll.cntr2clk);
+ writel(cfg->main_pll_cntr3clk, &clock_manager_base->main_pll.cntr3clk);
+ writel(cfg->main_pll_cntr4clk, &clock_manager_base->main_pll.cntr4clk);
+ writel(cfg->main_pll_cntr5clk, &clock_manager_base->main_pll.cntr5clk);
+ writel(cfg->main_pll_cntr6clk, &clock_manager_base->main_pll.cntr6clk);
+ writel(cfg->main_pll_cntr7clk, &clock_manager_base->main_pll.cntr7clk);
+ writel(cfg->main_pll_cntr8clk, &clock_manager_base->main_pll.cntr8clk);
+ writel(cfg->main_pll_cntr9clk, &clock_manager_base->main_pll.cntr9clk);
+ writel(cfg->per_pll_cntr2clk, &clock_manager_base->per_pll.cntr2clk);
+ writel(cfg->per_pll_cntr3clk, &clock_manager_base->per_pll.cntr3clk);
+ writel(cfg->per_pll_cntr4clk, &clock_manager_base->per_pll.cntr4clk);
+ writel(cfg->per_pll_cntr5clk, &clock_manager_base->per_pll.cntr5clk);
+ writel(cfg->per_pll_cntr6clk, &clock_manager_base->per_pll.cntr6clk);
+ writel(cfg->per_pll_cntr7clk, &clock_manager_base->per_pll.cntr7clk);
+ writel(cfg->per_pll_cntr8clk, &clock_manager_base->per_pll.cntr8clk);
+ writel(cfg->per_pll_cntr9clk, &clock_manager_base->per_pll.cntr9clk);
+
+ /* Take all PLLs out of bypass */
+ cm_write_bypass_mainpll(0);
+ cm_write_bypass_perpll(0);
+
+ /* clear safe mode / out of boot mode */
+ cm_write_ctrl(readl(&clock_manager_base->ctrl)
+ & ~(CLKMGR_CTRL_SAFEMODE));
+
+ /* Now ungate non-hw-managed clocks */
+ writel(~0, &clock_manager_base->main_pll.en);
+ writel(~0, &clock_manager_base->per_pll.en);
+
+ /* Clear the loss of lock bits (write 1 to clear) */
+ writel(CLKMGR_INTER_PERPLLLOST_MASK | CLKMGR_INTER_MAINPLLLOST_MASK,
+ &clock_manager_base->intrclr);
+}
+
+static unsigned long cm_get_main_vco_clk_hz(void)
+{
+ unsigned long fref, refdiv, mdiv, reg, vco;
+
+ reg = readl(&clock_manager_base->main_pll.pllglob);
+
+ fref = (reg >> CLKMGR_PLLGLOB_VCO_PSRC_OFFSET) &
+ CLKMGR_PLLGLOB_VCO_PSRC_MASK;
+ switch (fref) {
+ case CLKMGR_VCO_PSRC_EOSC1:
+ fref = cm_get_osc_clk_hz();
+ break;
+ case CLKMGR_VCO_PSRC_INTOSC:
+ fref = cm_get_intosc_clk_hz();
+ break;
+ case CLKMGR_VCO_PSRC_F2S:
+ fref = cm_get_fpga_clk_hz();
+ break;
+ }
+
+ refdiv = (reg >> CLKMGR_PLLGLOB_REFCLKDIV_OFFSET) &
+ CLKMGR_PLLGLOB_REFCLKDIV_MASK;
+
+ reg = readl(&clock_manager_base->main_pll.fdbck);
+ mdiv = (reg >> CLKMGR_FDBCK_MDIV_OFFSET) & CLKMGR_FDBCK_MDIV_MASK;
+
+ vco = fref / refdiv;
+ vco = vco * (CLKMGR_MDIV_CONST + mdiv);
+ return vco;
+}
+
+static unsigned long cm_get_per_vco_clk_hz(void)
+{
+ unsigned long fref, refdiv, mdiv, reg, vco;
+
+ reg = readl(&clock_manager_base->per_pll.pllglob);
+
+ fref = (reg >> CLKMGR_PLLGLOB_VCO_PSRC_OFFSET) &
+ CLKMGR_PLLGLOB_VCO_PSRC_MASK;
+ switch (fref) {
+ case CLKMGR_VCO_PSRC_EOSC1:
+ fref = cm_get_osc_clk_hz();
+ break;
+ case CLKMGR_VCO_PSRC_INTOSC:
+ fref = cm_get_intosc_clk_hz();
+ break;
+ case CLKMGR_VCO_PSRC_F2S:
+ fref = cm_get_fpga_clk_hz();
+ break;
+ }
+
+ refdiv = (reg >> CLKMGR_PLLGLOB_REFCLKDIV_OFFSET) &
+ CLKMGR_PLLGLOB_REFCLKDIV_MASK;
+
+ reg = readl(&clock_manager_base->per_pll.fdbck);
+ mdiv = (reg >> CLKMGR_FDBCK_MDIV_OFFSET) & CLKMGR_FDBCK_MDIV_MASK;
+
+ vco = fref / refdiv;
+ vco = vco * (CLKMGR_MDIV_CONST + mdiv);
+ return vco;
+}
+
+unsigned long cm_get_mpu_clk_hz(void)
+{
+ unsigned long clock = readl(&clock_manager_base->main_pll.mpuclk);
+
+ clock = (clock >> CLKMGR_CLKSRC_OFFSET) & CLKMGR_CLKSRC_MASK;
+
+ switch (clock) {
+ case CLKMGR_CLKSRC_MAIN:
+ clock = cm_get_main_vco_clk_hz();
+ clock /= (readl(&clock_manager_base->main_pll.pllc0) &
+ CLKMGR_PLLC0_DIV_MASK);
+ break;
+
+ case CLKMGR_CLKSRC_PER:
+ clock = cm_get_per_vco_clk_hz();
+ clock /= (readl(&clock_manager_base->per_pll.pllc0) &
+ CLKMGR_CLKCNT_MSK);
+ break;
+
+ case CLKMGR_CLKSRC_OSC1:
+ clock = cm_get_osc_clk_hz();
+ break;
+
+ case CLKMGR_CLKSRC_INTOSC:
+ clock = cm_get_intosc_clk_hz();
+ break;
+
+ case CLKMGR_CLKSRC_FPGA:
+ clock = cm_get_fpga_clk_hz();
+ break;
+ }
+
+ clock /= 1 + (readl(&clock_manager_base->main_pll.mpuclk) &
+ CLKMGR_CLKCNT_MSK);
+ return clock;
+}
+
+unsigned int cm_get_l3_main_clk_hz(void)
+{
+ u32 clock = readl(&clock_manager_base->main_pll.nocclk);
+
+ clock = (clock >> CLKMGR_CLKSRC_OFFSET) & CLKMGR_CLKSRC_MASK;
+
+ switch (clock) {
+ case CLKMGR_CLKSRC_MAIN:
+ clock = cm_get_main_vco_clk_hz();
+ clock /= (readl(&clock_manager_base->main_pll.pllc1) &
+ CLKMGR_PLLC0_DIV_MASK);
+ break;
+
+ case CLKMGR_CLKSRC_PER:
+ clock = cm_get_per_vco_clk_hz();
+ clock /= (readl(&clock_manager_base->per_pll.pllc1) &
+ CLKMGR_CLKCNT_MSK);
+ break;
+
+ case CLKMGR_CLKSRC_OSC1:
+ clock = cm_get_osc_clk_hz();
+ break;
+
+ case CLKMGR_CLKSRC_INTOSC:
+ clock = cm_get_intosc_clk_hz();
+ break;
+
+ case CLKMGR_CLKSRC_FPGA:
+ clock = cm_get_fpga_clk_hz();
+ break;
+ }
+
+ clock /= 1 + (readl(&clock_manager_base->main_pll.nocclk) &
+ CLKMGR_CLKCNT_MSK);
+ return clock;
+}
+
+unsigned int cm_get_mmc_controller_clk_hz(void)
+{
+ u32 clock = readl(&clock_manager_base->per_pll.cntr6clk);
+
+ clock = (clock >> CLKMGR_CLKSRC_OFFSET) & CLKMGR_CLKSRC_MASK;
+
+ switch (clock) {
+ case CLKMGR_CLKSRC_MAIN:
+ clock = cm_get_l3_main_clk_hz();
+ clock /= 1 + (readl(&clock_manager_base->main_pll.cntr6clk) &
+ CLKMGR_CLKCNT_MSK);
+ break;
+
+ case CLKMGR_CLKSRC_PER:
+ clock = cm_get_l3_main_clk_hz();
+ clock /= 1 + (readl(&clock_manager_base->per_pll.cntr6clk) &
+ CLKMGR_CLKCNT_MSK);
+ break;
+
+ case CLKMGR_CLKSRC_OSC1:
+ clock = cm_get_osc_clk_hz();
+ break;
+
+ case CLKMGR_CLKSRC_INTOSC:
+ clock = cm_get_intosc_clk_hz();
+ break;
+
+ case CLKMGR_CLKSRC_FPGA:
+ clock = cm_get_fpga_clk_hz();
+ break;
+ }
+ return clock / 4;
+}
+
+unsigned int cm_get_l4_sp_clk_hz(void)
+{
+ u32 clock = cm_get_l3_main_clk_hz();
+
+ clock /= (1 << ((readl(&clock_manager_base->main_pll.nocdiv) >>
+ CLKMGR_NOCDIV_L4SPCLK_OFFSET) & CLKMGR_CLKCNT_MSK));
+ return clock;
+}
+
+unsigned int cm_get_qspi_controller_clk_hz(void)
+{
+ return readl(&sysmgr_regs->boot_scratch_cold0);
+}
+
+unsigned int cm_get_spi_controller_clk_hz(void)
+{
+ u32 clock = cm_get_l3_main_clk_hz();
+
+ clock /= (1 << ((readl(&clock_manager_base->main_pll.nocdiv) >>
+ CLKMGR_NOCDIV_L4MAIN_OFFSET) & CLKMGR_CLKCNT_MSK));
+ return clock;
+}
+
+unsigned int cm_get_l4_sys_free_clk_hz(void)
+{
+ return cm_get_l3_main_clk_hz() / 4;
+}
+
+void cm_print_clock_quick_summary(void)
+{
+ printf("MPU %d kHz\n", (u32)(cm_get_mpu_clk_hz() / 1000));
+ printf("L3 main %d kHz\n", cm_get_l3_main_clk_hz() / 1000);
+ printf("Main VCO %d kHz\n", (u32)(cm_get_main_vco_clk_hz() / 1000));
+ printf("Per VCO %d kHz\n", (u32)(cm_get_per_vco_clk_hz() / 1000));
+ printf("EOSC1 %d kHz\n", cm_get_osc_clk_hz() / 1000);
+ printf("HPS MMC %d kHz\n", cm_get_mmc_controller_clk_hz() / 1000);
+ printf("UART %d kHz\n", cm_get_l4_sp_clk_hz() / 1000);
+}