--- /dev/null
+/*
+ * Copyright (C) 2010-2011 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <div64.h>
+#include <asm/io.h>
+#include <asm/errno.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/crm_regs.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/sys_proto.h>
+
+enum pll_clocks {
+ PLL_SYS, /* System PLL */
+ PLL_BUS, /* System Bus PLL*/
+ PLL_USBOTG, /* OTG USB PLL */
+ PLL_ENET, /* ENET PLL */
+};
+
+struct mxc_ccm_reg *imx_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
+
+#ifdef CONFIG_MXC_OCOTP
+void enable_ocotp_clk(unsigned char enable)
+{
+ u32 reg;
+
+ reg = __raw_readl(&imx_ccm->CCGR2);
+ if (enable)
+ reg |= MXC_CCM_CCGR2_OCOTP_CTRL_MASK;
+ else
+ reg &= ~MXC_CCM_CCGR2_OCOTP_CTRL_MASK;
+ __raw_writel(reg, &imx_ccm->CCGR2);
+}
+#endif
+
+void enable_usboh3_clk(unsigned char enable)
+{
+ u32 reg;
+
+ reg = __raw_readl(&imx_ccm->CCGR6);
+ if (enable)
+ reg |= MXC_CCM_CCGR6_USBOH3_MASK;
+ else
+ reg &= ~(MXC_CCM_CCGR6_USBOH3_MASK);
+ __raw_writel(reg, &imx_ccm->CCGR6);
+
+}
+
+#ifdef CONFIG_SYS_I2C_MXC
+/* i2c_num can be from 0 - 2 */
+int enable_i2c_clk(unsigned char enable, unsigned i2c_num)
+{
+ u32 reg;
+ u32 mask;
+
+ if (i2c_num > 2)
+ return -EINVAL;
+
+ mask = MXC_CCM_CCGR_CG_MASK
+ << (MXC_CCM_CCGR2_I2C1_SERIAL_OFFSET + (i2c_num << 1));
+ reg = __raw_readl(&imx_ccm->CCGR2);
+ if (enable)
+ reg |= mask;
+ else
+ reg &= ~mask;
+ __raw_writel(reg, &imx_ccm->CCGR2);
+ return 0;
+}
+#endif
+
+static u32 decode_pll(enum pll_clocks pll, u32 infreq)
+{
+ u32 div;
+
+ switch (pll) {
+ case PLL_SYS:
+ div = __raw_readl(&imx_ccm->analog_pll_sys);
+ div &= BM_ANADIG_PLL_SYS_DIV_SELECT;
+
+ return infreq * (div >> 1);
+ case PLL_BUS:
+ div = __raw_readl(&imx_ccm->analog_pll_528);
+ div &= BM_ANADIG_PLL_528_DIV_SELECT;
+
+ return infreq * (20 + (div << 1));
+ case PLL_USBOTG:
+ div = __raw_readl(&imx_ccm->analog_usb1_pll_480_ctrl);
+ div &= BM_ANADIG_USB1_PLL_480_CTRL_DIV_SELECT;
+
+ return infreq * (20 + (div << 1));
+ case PLL_ENET:
+ div = __raw_readl(&imx_ccm->analog_pll_enet);
+ div &= BM_ANADIG_PLL_ENET_DIV_SELECT;
+
+ return 25000000 * (div + (div >> 1) + 1);
+ default:
+ return 0;
+ }
+ /* NOTREACHED */
+}
+static u32 mxc_get_pll_pfd(enum pll_clocks pll, int pfd_num)
+{
+ u32 div;
+ u64 freq;
+
+ switch (pll) {
+ case PLL_BUS:
+ if (pfd_num == 3) {
+ /* No PFD3 on PPL2 */
+ return 0;
+ }
+ div = __raw_readl(&imx_ccm->analog_pfd_528);
+ freq = (u64)decode_pll(PLL_BUS, MXC_HCLK);
+ break;
+ case PLL_USBOTG:
+ div = __raw_readl(&imx_ccm->analog_pfd_480);
+ freq = (u64)decode_pll(PLL_USBOTG, MXC_HCLK);
+ break;
+ default:
+ /* No PFD on other PLL */
+ return 0;
+ }
+
+ return lldiv(freq * 18, (div & ANATOP_PFD_FRAC_MASK(pfd_num)) >>
+ ANATOP_PFD_FRAC_SHIFT(pfd_num));
+}
+
+static u32 get_mcu_main_clk(void)
+{
+ u32 reg, freq;
+
+ reg = __raw_readl(&imx_ccm->cacrr);
+ reg &= MXC_CCM_CACRR_ARM_PODF_MASK;
+ reg >>= MXC_CCM_CACRR_ARM_PODF_OFFSET;
+ freq = decode_pll(PLL_SYS, MXC_HCLK);
+
+ return freq / (reg + 1);
+}
+
+u32 get_periph_clk(void)
+{
+ u32 reg, freq = 0;
+
+ reg = __raw_readl(&imx_ccm->cbcdr);
+ if (reg & MXC_CCM_CBCDR_PERIPH_CLK_SEL) {
+ reg = __raw_readl(&imx_ccm->cbcmr);
+ reg &= MXC_CCM_CBCMR_PERIPH_CLK2_SEL_MASK;
+ reg >>= MXC_CCM_CBCMR_PERIPH_CLK2_SEL_OFFSET;
+
+ switch (reg) {
+ case 0:
+ freq = decode_pll(PLL_USBOTG, MXC_HCLK);
+ break;
+ case 1:
+ case 2:
+ freq = MXC_HCLK;
+ break;
+ default:
+ break;
+ }
+ } else {
+ reg = __raw_readl(&imx_ccm->cbcmr);
+ reg &= MXC_CCM_CBCMR_PRE_PERIPH_CLK_SEL_MASK;
+ reg >>= MXC_CCM_CBCMR_PRE_PERIPH_CLK_SEL_OFFSET;
+
+ switch (reg) {
+ case 0:
+ freq = decode_pll(PLL_BUS, MXC_HCLK);
+ break;
+ case 1:
+ freq = mxc_get_pll_pfd(PLL_BUS, 2);
+ break;
+ case 2:
+ freq = mxc_get_pll_pfd(PLL_BUS, 0);
+ break;
+ case 3:
+ /* static / 2 divider */
+ freq = mxc_get_pll_pfd(PLL_BUS, 2) / 2;
+ break;
+ default:
+ break;
+ }
+ }
+
+ return freq;
+}
+
+static u32 get_ipg_clk(void)
+{
+ u32 reg, ipg_podf;
+
+ reg = __raw_readl(&imx_ccm->cbcdr);
+ reg &= MXC_CCM_CBCDR_IPG_PODF_MASK;
+ ipg_podf = reg >> MXC_CCM_CBCDR_IPG_PODF_OFFSET;
+
+ return get_ahb_clk() / (ipg_podf + 1);
+}
+
+static u32 get_ipg_per_clk(void)
+{
+ u32 reg, perclk_podf;
+
+ reg = __raw_readl(&imx_ccm->cscmr1);
+ perclk_podf = reg & MXC_CCM_CSCMR1_PERCLK_PODF_MASK;
+
+ return get_ipg_clk() / (perclk_podf + 1);
+}
+
+static u32 get_uart_clk(void)
+{
+ u32 reg, uart_podf;
+ u32 freq = decode_pll(PLL_USBOTG, MXC_HCLK) / 6; /* static divider */
+ reg = __raw_readl(&imx_ccm->cscdr1);
+#ifdef CONFIG_MX6SL
+ if (reg & MXC_CCM_CSCDR1_UART_CLK_SEL)
+ freq = MXC_HCLK;
+#endif
+ reg &= MXC_CCM_CSCDR1_UART_CLK_PODF_MASK;
+ uart_podf = reg >> MXC_CCM_CSCDR1_UART_CLK_PODF_OFFSET;
+
+ return freq / (uart_podf + 1);
+}
+
+static u32 get_cspi_clk(void)
+{
+ u32 reg, cspi_podf;
+
+ reg = __raw_readl(&imx_ccm->cscdr2);
+ reg &= MXC_CCM_CSCDR2_ECSPI_CLK_PODF_MASK;
+ cspi_podf = reg >> MXC_CCM_CSCDR2_ECSPI_CLK_PODF_OFFSET;
+
+ return decode_pll(PLL_USBOTG, MXC_HCLK) / (8 * (cspi_podf + 1));
+}
+
+static u32 get_axi_clk(void)
+{
+ u32 root_freq, axi_podf;
+ u32 cbcdr = __raw_readl(&imx_ccm->cbcdr);
+
+ axi_podf = cbcdr & MXC_CCM_CBCDR_AXI_PODF_MASK;
+ axi_podf >>= MXC_CCM_CBCDR_AXI_PODF_OFFSET;
+
+ if (cbcdr & MXC_CCM_CBCDR_AXI_SEL) {
+ if (cbcdr & MXC_CCM_CBCDR_AXI_ALT_SEL)
+ root_freq = mxc_get_pll_pfd(PLL_BUS, 2);
+ else
+ root_freq = mxc_get_pll_pfd(PLL_USBOTG, 1);
+ } else
+ root_freq = get_periph_clk();
+
+ return root_freq / (axi_podf + 1);
+}
+
+static u32 get_emi_slow_clk(void)
+{
+ u32 emi_clk_sel, emi_slow_podf, cscmr1, root_freq = 0;
+
+ cscmr1 = __raw_readl(&imx_ccm->cscmr1);
+ emi_clk_sel = cscmr1 & MXC_CCM_CSCMR1_ACLK_EMI_SLOW_MASK;
+ emi_clk_sel >>= MXC_CCM_CSCMR1_ACLK_EMI_SLOW_OFFSET;
+ emi_slow_podf = cscmr1 & MXC_CCM_CSCMR1_ACLK_EMI_SLOW_PODF_MASK;
+ emi_slow_podf >>= MXC_CCM_CSCMR1_ACLK_EMI_SLOW_PODF_OFFSET;
+
+ switch (emi_clk_sel) {
+ case 0:
+ root_freq = get_axi_clk();
+ break;
+ case 1:
+ root_freq = decode_pll(PLL_USBOTG, MXC_HCLK);
+ break;
+ case 2:
+ root_freq = mxc_get_pll_pfd(PLL_BUS, 2);
+ break;
+ case 3:
+ root_freq = mxc_get_pll_pfd(PLL_BUS, 0);
+ break;
+ }
+
+ return root_freq / (emi_slow_podf + 1);
+}
+
+#ifdef CONFIG_MX6SL
+static u32 get_mmdc_ch0_clk(void)
+{
+ u32 cbcmr = __raw_readl(&imx_ccm->cbcmr);
+ u32 cbcdr = __raw_readl(&imx_ccm->cbcdr);
+ u32 freq, podf;
+
+ podf = (cbcdr & MXC_CCM_CBCDR_MMDC_CH1_PODF_MASK) \
+ >> MXC_CCM_CBCDR_MMDC_CH1_PODF_OFFSET;
+
+ switch ((cbcmr & MXC_CCM_CBCMR_PRE_PERIPH2_CLK_SEL_MASK) >>
+ MXC_CCM_CBCMR_PRE_PERIPH2_CLK_SEL_OFFSET) {
+ case 0:
+ freq = decode_pll(PLL_BUS, MXC_HCLK);
+ break;
+ case 1:
+ freq = mxc_get_pll_pfd(PLL_BUS, 2);
+ break;
+ case 2:
+ freq = mxc_get_pll_pfd(PLL_BUS, 0);
+ break;
+ case 3:
+ /* static / 2 divider */
+ freq = mxc_get_pll_pfd(PLL_BUS, 2) / 2;
+ }
+
+ return freq / (podf + 1);
+
+}
+#else
+static u32 get_mmdc_ch0_clk(void)
+{
+ u32 cbcdr = __raw_readl(&imx_ccm->cbcdr);
+ u32 mmdc_ch0_podf = (cbcdr & MXC_CCM_CBCDR_MMDC_CH0_PODF_MASK) >>
+ MXC_CCM_CBCDR_MMDC_CH0_PODF_OFFSET;
+
+ return get_periph_clk() / (mmdc_ch0_podf + 1);
+}
+#endif
+
+#ifdef CONFIG_FEC_MXC
+int enable_fec_anatop_clock(enum enet_freq freq)
+{
+ u32 reg = 0;
+ s32 timeout = 100000;
+
+ struct anatop_regs __iomem *anatop =
+ (struct anatop_regs __iomem *)ANATOP_BASE_ADDR;
+
+ if (freq < ENET_25MHz || freq > ENET_125MHz)
+ return -EINVAL;
+
+ reg = readl(&anatop->pll_enet);
+ reg &= ~BM_ANADIG_PLL_ENET_DIV_SELECT;
+ reg |= freq;
+
+ if ((reg & BM_ANADIG_PLL_ENET_POWERDOWN) ||
+ (!(reg & BM_ANADIG_PLL_ENET_LOCK))) {
+ reg &= ~BM_ANADIG_PLL_ENET_POWERDOWN;
+ writel(reg, &anatop->pll_enet);
+ while (timeout--) {
+ if (readl(&anatop->pll_enet) & BM_ANADIG_PLL_ENET_LOCK)
+ break;
+ }
+ if (timeout < 0)
+ return -ETIMEDOUT;
+ }
+
+ /* Enable FEC clock */
+ reg |= BM_ANADIG_PLL_ENET_ENABLE;
+ reg &= ~BM_ANADIG_PLL_ENET_BYPASS;
+ writel(reg, &anatop->pll_enet);
+
+ return 0;
+}
+#endif
+
+static u32 get_usdhc_clk(u32 port)
+{
+ u32 root_freq = 0, usdhc_podf = 0, clk_sel = 0;
+ u32 cscmr1 = __raw_readl(&imx_ccm->cscmr1);
+ u32 cscdr1 = __raw_readl(&imx_ccm->cscdr1);
+
+ switch (port) {
+ case 0:
+ usdhc_podf = (cscdr1 & MXC_CCM_CSCDR1_USDHC1_PODF_MASK) >>
+ MXC_CCM_CSCDR1_USDHC1_PODF_OFFSET;
+ clk_sel = cscmr1 & MXC_CCM_CSCMR1_USDHC1_CLK_SEL;
+
+ break;
+ case 1:
+ usdhc_podf = (cscdr1 & MXC_CCM_CSCDR1_USDHC2_PODF_MASK) >>
+ MXC_CCM_CSCDR1_USDHC2_PODF_OFFSET;
+ clk_sel = cscmr1 & MXC_CCM_CSCMR1_USDHC2_CLK_SEL;
+
+ break;
+ case 2:
+ usdhc_podf = (cscdr1 & MXC_CCM_CSCDR1_USDHC3_PODF_MASK) >>
+ MXC_CCM_CSCDR1_USDHC3_PODF_OFFSET;
+ clk_sel = cscmr1 & MXC_CCM_CSCMR1_USDHC3_CLK_SEL;
+
+ break;
+ case 3:
+ usdhc_podf = (cscdr1 & MXC_CCM_CSCDR1_USDHC4_PODF_MASK) >>
+ MXC_CCM_CSCDR1_USDHC4_PODF_OFFSET;
+ clk_sel = cscmr1 & MXC_CCM_CSCMR1_USDHC4_CLK_SEL;
+
+ break;
+ default:
+ break;
+ }
+
+ if (clk_sel)
+ root_freq = mxc_get_pll_pfd(PLL_BUS, 0);
+ else
+ root_freq = mxc_get_pll_pfd(PLL_BUS, 2);
+
+ return root_freq / (usdhc_podf + 1);
+}
+
+u32 imx_get_uartclk(void)
+{
+ return get_uart_clk();
+}
+
+u32 imx_get_fecclk(void)
+{
+ return mxc_get_clock(MXC_IPG_CLK);
+}
+
+static int enable_enet_pll(uint32_t en)
+{
+ struct mxc_ccm_reg *const imx_ccm
+ = (struct mxc_ccm_reg *) CCM_BASE_ADDR;
+ s32 timeout = 100000;
+ u32 reg = 0;
+
+ /* Enable PLLs */
+ reg = readl(&imx_ccm->analog_pll_enet);
+ reg &= ~BM_ANADIG_PLL_SYS_POWERDOWN;
+ writel(reg, &imx_ccm->analog_pll_enet);
+ reg |= BM_ANADIG_PLL_SYS_ENABLE;
+ while (timeout--) {
+ if (readl(&imx_ccm->analog_pll_enet) & BM_ANADIG_PLL_SYS_LOCK)
+ break;
+ }
+ if (timeout <= 0)
+ return -EIO;
+ reg &= ~BM_ANADIG_PLL_SYS_BYPASS;
+ writel(reg, &imx_ccm->analog_pll_enet);
+ reg |= en;
+ writel(reg, &imx_ccm->analog_pll_enet);
+ return 0;
+}
+
+static void ungate_sata_clock(void)
+{
+ struct mxc_ccm_reg *const imx_ccm =
+ (struct mxc_ccm_reg *)CCM_BASE_ADDR;
+
+ /* Enable SATA clock. */
+ setbits_le32(&imx_ccm->CCGR5, MXC_CCM_CCGR5_SATA_MASK);
+}
+
+static void ungate_pcie_clock(void)
+{
+ struct mxc_ccm_reg *const imx_ccm =
+ (struct mxc_ccm_reg *)CCM_BASE_ADDR;
+
+ /* Enable PCIe clock. */
+ setbits_le32(&imx_ccm->CCGR4, MXC_CCM_CCGR4_PCIE_MASK);
+}
+
+int enable_sata_clock(void)
+{
+ ungate_sata_clock();
+ return enable_enet_pll(BM_ANADIG_PLL_ENET_ENABLE_SATA);
+}
+
+int enable_pcie_clock(void)
+{
+ struct anatop_regs *anatop_regs =
+ (struct anatop_regs *)ANATOP_BASE_ADDR;
+ struct mxc_ccm_reg *ccm_regs = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
+
+ /*
+ * Here be dragons!
+ *
+ * The register ANATOP_MISC1 is not documented in the Freescale
+ * MX6RM. The register that is mapped in the ANATOP space and
+ * marked as ANATOP_MISC1 is actually documented in the PMU section
+ * of the datasheet as PMU_MISC1.
+ *
+ * Switch LVDS clock source to SATA (0xb), disable clock INPUT and
+ * enable clock OUTPUT. This is important for PCI express link that
+ * is clocked from the i.MX6.
+ */
+#define ANADIG_ANA_MISC1_LVDSCLK1_IBEN (1 << 12)
+#define ANADIG_ANA_MISC1_LVDSCLK1_OBEN (1 << 10)
+#define ANADIG_ANA_MISC1_LVDS1_CLK_SEL_MASK 0x0000001F
+ clrsetbits_le32(&anatop_regs->ana_misc1,
+ ANADIG_ANA_MISC1_LVDSCLK1_IBEN |
+ ANADIG_ANA_MISC1_LVDS1_CLK_SEL_MASK,
+ ANADIG_ANA_MISC1_LVDSCLK1_OBEN | 0xb);
+
+ /* PCIe reference clock sourced from AXI. */
+ clrbits_le32(&ccm_regs->cbcmr, MXC_CCM_CBCMR_PCIE_AXI_CLK_SEL);
+
+ /* Party time! Ungate the clock to the PCIe. */
+ ungate_sata_clock();
+ ungate_pcie_clock();
+
+ return enable_enet_pll(BM_ANADIG_PLL_ENET_ENABLE_SATA |
+ BM_ANADIG_PLL_ENET_ENABLE_PCIE);
+}
+
+unsigned int mxc_get_clock(enum mxc_clock clk)
+{
+ switch (clk) {
+ case MXC_ARM_CLK:
+ return get_mcu_main_clk();
+ case MXC_PER_CLK:
+ return get_periph_clk();
+ case MXC_AHB_CLK:
+ return get_ahb_clk();
+ case MXC_IPG_CLK:
+ return get_ipg_clk();
+ case MXC_IPG_PERCLK:
+ case MXC_I2C_CLK:
+ return get_ipg_per_clk();
+ case MXC_UART_CLK:
+ return get_uart_clk();
+ case MXC_CSPI_CLK:
+ return get_cspi_clk();
+ case MXC_AXI_CLK:
+ return get_axi_clk();
+ case MXC_EMI_SLOW_CLK:
+ return get_emi_slow_clk();
+ case MXC_DDR_CLK:
+ return get_mmdc_ch0_clk();
+ case MXC_ESDHC_CLK:
+ return get_usdhc_clk(0);
+ case MXC_ESDHC2_CLK:
+ return get_usdhc_clk(1);
+ case MXC_ESDHC3_CLK:
+ return get_usdhc_clk(2);
+ case MXC_ESDHC4_CLK:
+ return get_usdhc_clk(3);
+ case MXC_SATA_CLK:
+ return get_ahb_clk();
+ default:
+ break;
+ }
+
+ return -1;
+}
+
+/*
+ * Dump some core clockes.
+ */
+int do_mx6_showclocks(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ u32 freq;
+ freq = decode_pll(PLL_SYS, MXC_HCLK);
+ printf("PLL_SYS %8d MHz\n", freq / 1000000);
+ freq = decode_pll(PLL_BUS, MXC_HCLK);
+ printf("PLL_BUS %8d MHz\n", freq / 1000000);
+ freq = decode_pll(PLL_USBOTG, MXC_HCLK);
+ printf("PLL_OTG %8d MHz\n", freq / 1000000);
+ freq = decode_pll(PLL_ENET, MXC_HCLK);
+ printf("PLL_NET %8d MHz\n", freq / 1000000);
+
+ printf("\n");
+ printf("IPG %8d kHz\n", mxc_get_clock(MXC_IPG_CLK) / 1000);
+ printf("UART %8d kHz\n", mxc_get_clock(MXC_UART_CLK) / 1000);
+#ifdef CONFIG_MXC_SPI
+ printf("CSPI %8d kHz\n", mxc_get_clock(MXC_CSPI_CLK) / 1000);
+#endif
+ printf("AHB %8d kHz\n", mxc_get_clock(MXC_AHB_CLK) / 1000);
+ printf("AXI %8d kHz\n", mxc_get_clock(MXC_AXI_CLK) / 1000);
+ printf("DDR %8d kHz\n", mxc_get_clock(MXC_DDR_CLK) / 1000);
+ printf("USDHC1 %8d kHz\n", mxc_get_clock(MXC_ESDHC_CLK) / 1000);
+ printf("USDHC2 %8d kHz\n", mxc_get_clock(MXC_ESDHC2_CLK) / 1000);
+ printf("USDHC3 %8d kHz\n", mxc_get_clock(MXC_ESDHC3_CLK) / 1000);
+ printf("USDHC4 %8d kHz\n", mxc_get_clock(MXC_ESDHC4_CLK) / 1000);
+ printf("EMI SLOW %8d kHz\n", mxc_get_clock(MXC_EMI_SLOW_CLK) / 1000);
+ printf("IPG PERCLK %8d kHz\n", mxc_get_clock(MXC_IPG_PERCLK) / 1000);
+
+ return 0;
+}
+
+void enable_ipu_clock(void)
+{
+ struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
+ int reg;
+ reg = readl(&mxc_ccm->CCGR3);
+ reg |= MXC_CCM_CCGR3_IPU1_IPU_MASK;
+ writel(reg, &mxc_ccm->CCGR3);
+}
+/***************************************************/
+
+U_BOOT_CMD(
+ clocks, CONFIG_SYS_MAXARGS, 1, do_mx6_showclocks,
+ "display clocks",
+ ""
+);
Code Review / kvmfornfv.git / blobdiff