i.mx: add the initial support for freescale i.MX6Q processor
i.MX6Q is freescale quad core processors with ARM cortex_a9 complex.
This patch is to add the initial support for this processor.
Signed-off-by: Jason Liu <jason.hui@linaro.org>
Cc:Stefano Babic <sbabic@denx.de>
diff --git a/arch/arm/cpu/armv7/mx6/clock.c b/arch/arm/cpu/armv7/mx6/clock.c
new file mode 100644
index 0000000..b143535
--- /dev/null
+++ b/arch/arm/cpu/armv7/mx6/clock.c
@@ -0,0 +1,366 @@
+/*
+ * Copyright (C) 2010-2011 Freescale Semiconductor, Inc.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/errno.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/ccm_regs.h>
+#include <asm/arch/clock.h>
+
+enum pll_clocks {
+ PLL_SYS, /* System PLL */
+ PLL_BUS, /* System Bus PLL*/
+ PLL_USBOTG, /* OTG USB PLL */
+ PLL_ENET, /* ENET PLL */
+};
+
+struct imx_ccm_reg *imx_ccm = (struct imx_ccm_reg *)CCM_BASE_ADDR;
+
+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 (div == 3 ? 125000000 : 25000000 * (div << 1));
+ default:
+ return 0;
+ }
+ /* NOTREACHED */
+}
+
+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, CONFIG_SYS_MX6_HCLK);
+
+ return freq / (reg + 1);
+}
+
+static 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, CONFIG_SYS_MX6_HCLK);
+ break;
+ case 1:
+ case 2:
+ freq = CONFIG_SYS_MX6_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, CONFIG_SYS_MX6_HCLK);
+ break;
+ case 1:
+ freq = PLL2_PFD2_FREQ;
+ break;
+ case 2:
+ freq = PLL2_PFD0_FREQ;
+ break;
+ case 3:
+ freq = PLL2_PFD2_DIV_FREQ;
+ break;
+ default:
+ break;
+ }
+ }
+
+ return freq;
+}
+
+
+static u32 get_ahb_clk(void)
+{
+ u32 reg, ahb_podf;
+
+ reg = __raw_readl(&imx_ccm->cbcdr);
+ reg &= MXC_CCM_CBCDR_AHB_PODF_MASK;
+ ahb_podf = reg >> MXC_CCM_CBCDR_AHB_PODF_OFFSET;
+
+ return get_periph_clk() / (ahb_podf + 1);
+}
+
+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;
+
+ reg = __raw_readl(&imx_ccm->cscdr1);
+ reg &= MXC_CCM_CSCDR1_UART_CLK_PODF_MASK;
+ uart_podf = reg >> MXC_CCM_CSCDR1_UART_CLK_PODF_OFFSET;
+
+ return PLL3_80M / (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 PLL3_60M / (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 = PLL2_PFD2_FREQ;
+ else
+ root_freq = PLL3_PFD1_FREQ;
+ } 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_pof, 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_pof = cscmr1 & MXC_CCM_CSCMR1_ACLK_EMI_SLOW_PODF_MASK;
+ emi_slow_pof >>= MXC_CCM_CSCMR1_ACLK_EMI_PODF_OFFSET;
+
+ switch (emi_clk_sel) {
+ case 0:
+ root_freq = get_axi_clk();
+ break;
+ case 1:
+ root_freq = decode_pll(PLL_USBOTG, CONFIG_SYS_MX6_HCLK);
+ break;
+ case 2:
+ root_freq = PLL2_PFD2_FREQ;
+ break;
+ case 3:
+ root_freq = PLL2_PFD0_FREQ;
+ break;
+ }
+
+ return root_freq / (emi_slow_pof + 1);
+}
+
+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);
+}
+
+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 = PLL2_PFD0_FREQ;
+ else
+ root_freq = PLL2_PFD2_FREQ;
+
+ return root_freq / (usdhc_podf + 1);
+}
+
+u32 imx_get_uartclk(void)
+{
+ return get_uart_clk();
+}
+
+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:
+ 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, CONFIG_SYS_MX6_HCLK);
+ printf("PLL_SYS %8d MHz\n", freq / 1000000);
+ freq = decode_pll(PLL_BUS, CONFIG_SYS_MX6_HCLK);
+ printf("PLL_BUS %8d MHz\n", freq / 1000000);
+ freq = decode_pll(PLL_USBOTG, CONFIG_SYS_MX6_HCLK);
+ printf("PLL_OTG %8d MHz\n", freq / 1000000);
+ freq = decode_pll(PLL_ENET, CONFIG_SYS_MX6_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);
+ printf("CSPI %8d kHz\n", mxc_get_clock(MXC_CSPI_CLK) / 1000);
+ 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;
+}
+
+/***************************************************/
+
+U_BOOT_CMD(
+ clocks, CONFIG_SYS_MAXARGS, 1, do_mx6_showclocks,
+ "display clocks",
+ ""
+);