diff options
Diffstat (limited to 'arch/arm/cpu/arm1136')
| -rw-r--r-- | arch/arm/cpu/arm1136/mx35/Makefile | 63 | ||||
| -rw-r--r-- | arch/arm/cpu/arm1136/mx35/asm-offsets.c | 43 | ||||
| -rw-r--r-- | arch/arm/cpu/arm1136/mx35/generic.c | 463 | ||||
| -rw-r--r-- | arch/arm/cpu/arm1136/mx35/iomux.c | 116 | ||||
| -rw-r--r-- | arch/arm/cpu/arm1136/mx35/timer.c | 120 |
5 files changed, 805 insertions, 0 deletions
diff --git a/arch/arm/cpu/arm1136/mx35/Makefile b/arch/arm/cpu/arm1136/mx35/Makefile new file mode 100644 index 0000000..20f36e3 --- /dev/null +++ b/arch/arm/cpu/arm1136/mx35/Makefile @@ -0,0 +1,63 @@ +# +# (C) Copyright 2000-2006 +# Wolfgang Denk, DENX Software Engineering, wd@denx.de. +# +# (C) Copyright 2008-2009 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 $(TOPDIR)/config.mk + +LIB = $(obj)lib$(SOC).o + +COBJS += generic.o +COBJS += timer.o +COBJS += iomux.o + +SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c) +OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS)) + +all: $(obj).depend $(LIB) + +$(LIB): $(OBJS) + $(call cmd_link_o_target, $(OBJS)) + +$(OBJS) : $(TOPDIR)/include/asm/arch/asm-offsets.h + + +######################################################################### + +# defines $(obj).depend target +include $(SRCTREE)/rules.mk + +sinclude $(obj).depend + +######################################################################### + +$(TOPDIR)/include/asm/arch/asm-offsets.h: $(TOPDIR)/include/autoconf.mk.dep \ + ./asm-offsets.s + @echo Generating $@ + $(TOPDIR)/tools/scripts/make-asm-offsets ./asm-offsets.s $@ + +asm-offsets.s: $(TOPDIR)/include/autoconf.mk.dep \ + ./asm-offsets.c + $(CC) -DDO_DEPS_ONLY \ + $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR)) \ + -o $@ ./asm-offsets.c -c -S diff --git a/arch/arm/cpu/arm1136/mx35/asm-offsets.c b/arch/arm/cpu/arm1136/mx35/asm-offsets.c new file mode 100644 index 0000000..d2678e2 --- /dev/null +++ b/arch/arm/cpu/arm1136/mx35/asm-offsets.c @@ -0,0 +1,43 @@ +/* + * Adapted from Linux v2.6.36 kernel: arch/powerpc/kernel/asm-offsets.c + * + * This program is used to generate definitions needed by + * assembly language modules. + * + * We use the technique used in the OSF Mach kernel code: + * generate asm statements containing #defines, + * compile this file to assembler, and then extract the + * #defines from the assembly-language output. + * + * 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. + */ + +#include <common.h> +#include <asm/arch/imx-regs.h> + +#include <linux/kbuild.h> + +int main(void) +{ + + /* Round up to make sure size gives nice stack alignment */ + DEFINE(CLKCTL_CCMR, offsetof(struct ccm_regs, ccmr)); + DEFINE(CLKCTL_PDR0, offsetof(struct ccm_regs, pdr0)); + DEFINE(CLKCTL_PDR1, offsetof(struct ccm_regs, pdr1)); + DEFINE(CLKCTL_PDR2, offsetof(struct ccm_regs, pdr2)); + DEFINE(CLKCTL_PDR3, offsetof(struct ccm_regs, pdr3)); + DEFINE(CLKCTL_PDR4, offsetof(struct ccm_regs, pdr4)); + DEFINE(CLKCTL_RCSR, offsetof(struct ccm_regs, rcsr)); + DEFINE(CLKCTL_MPCTL, offsetof(struct ccm_regs, mpctl)); + DEFINE(CLKCTL_PPCTL, offsetof(struct ccm_regs, ppctl)); + DEFINE(CLKCTL_ACMR, offsetof(struct ccm_regs, acmr)); + DEFINE(CLKCTL_COSR, offsetof(struct ccm_regs, cosr)); + DEFINE(CLKCTL_CGR0, offsetof(struct ccm_regs, cgr0)); + DEFINE(CLKCTL_CGR1, offsetof(struct ccm_regs, cgr1)); + DEFINE(CLKCTL_CGR2, offsetof(struct ccm_regs, cgr2)); + + return 0; +} diff --git a/arch/arm/cpu/arm1136/mx35/generic.c b/arch/arm/cpu/arm1136/mx35/generic.c new file mode 100644 index 0000000..1b4ab75 --- /dev/null +++ b/arch/arm/cpu/arm1136/mx35/generic.c @@ -0,0 +1,463 @@ +/* + * (C) Copyright 2007 + * Sascha Hauer, Pengutronix + * + * (C) Copyright 2008-2010 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/crm_regs.h> +#include <asm/arch/clock.h> +#include <asm/arch/sys_proto.h> +#include <netdev.h> + +#define CLK_CODE(arm, ahb, sel) (((arm) << 16) + ((ahb) << 8) + (sel)) +#define CLK_CODE_ARM(c) (((c) >> 16) & 0xFF) +#define CLK_CODE_AHB(c) (((c) >> 8) & 0xFF) +#define CLK_CODE_PATH(c) ((c) & 0xFF) + +#define CCM_GET_DIVIDER(x, m, o) (((x) & (m)) >> (o)) + +#ifdef CONFIG_FSL_ESDHC +DECLARE_GLOBAL_DATA_PTR; +#endif + +static int g_clk_mux_auto[8] = { + CLK_CODE(1, 3, 0), CLK_CODE(1, 2, 1), CLK_CODE(2, 1, 1), -1, + CLK_CODE(1, 6, 0), CLK_CODE(1, 4, 1), CLK_CODE(2, 2, 1), -1, +}; + +static int g_clk_mux_consumer[16] = { + CLK_CODE(1, 4, 0), CLK_CODE(1, 3, 1), CLK_CODE(1, 3, 1), -1, + -1, -1, CLK_CODE(4, 1, 0), CLK_CODE(1, 5, 0), + CLK_CODE(1, 8, 1), CLK_CODE(1, 6, 1), CLK_CODE(2, 4, 0), -1, + -1, -1, CLK_CODE(4, 2, 0), -1, +}; + +static int hsp_div_table[3][16] = { + {4, 3, 2, -1, -1, -1, 1, 5, 4, 3, 2, -1, -1, -1, 1, -1}, + {-1, -1, -1, -1, -1, -1, -1, -1, 8, 6, 4, -1, -1, -1, 2, -1}, + {3, -1, -1, -1, -1, -1, -1, -1, 3, -1, -1, -1, -1, -1, -1, -1}, +}; + +u32 get_cpu_rev(void) +{ + int reg; + struct iim_regs *iim = + (struct iim_regs *)IIM_BASE_ADDR; + reg = readl(&iim->iim_srev); + if (!reg) { + reg = readw(ROMPATCH_REV); + reg <<= 4; + } else { + reg += CHIP_REV_1_0; + } + + return 0x35000 + (reg & 0xFF); +} + +static u32 get_arm_div(u32 pdr0, u32 *fi, u32 *fd) +{ + int *pclk_mux; + if (pdr0 & MXC_CCM_PDR0_AUTO_CON) { + pclk_mux = g_clk_mux_consumer + + ((pdr0 & MXC_CCM_PDR0_CON_MUX_DIV_MASK) >> + MXC_CCM_PDR0_CON_MUX_DIV_OFFSET); + } else { + pclk_mux = g_clk_mux_auto + + ((pdr0 & MXC_CCM_PDR0_AUTO_MUX_DIV_MASK) >> + MXC_CCM_PDR0_AUTO_MUX_DIV_OFFSET); + } + + if ((*pclk_mux) == -1) + return -1; + + if (fi && fd) { + if (!CLK_CODE_PATH(*pclk_mux)) { + *fi = *fd = 1; + return CLK_CODE_ARM(*pclk_mux); + } + if (pdr0 & MXC_CCM_PDR0_AUTO_CON) { + *fi = 3; + *fd = 4; + } else { + *fi = 2; + *fd = 3; + } + } + return CLK_CODE_ARM(*pclk_mux); +} + +static int get_ahb_div(u32 pdr0) +{ + int *pclk_mux; + + pclk_mux = g_clk_mux_consumer + + ((pdr0 & MXC_CCM_PDR0_CON_MUX_DIV_MASK) >> + MXC_CCM_PDR0_CON_MUX_DIV_OFFSET); + + if ((*pclk_mux) == -1) + return -1; + + return CLK_CODE_AHB(*pclk_mux); +} + +static u32 decode_pll(u32 reg, u32 infreq) +{ + u32 mfi = (reg >> 10) & 0xf; + u32 mfn = reg & 0x3f; + u32 mfd = (reg >> 16) & 0x3f; + u32 pd = (reg >> 26) & 0xf; + + mfi = mfi <= 5 ? 5 : mfi; + mfd += 1; + pd += 1; + + return ((2 * (infreq / 1000) * (mfi * mfd + mfn)) / (mfd * pd)) * 1000; +} + +static u32 get_mcu_main_clk(void) +{ + u32 arm_div = 0, fi = 0, fd = 0; + struct ccm_regs *ccm = + (struct ccm_regs *)IMX_CCM_BASE; + arm_div = get_arm_div(readl(&ccm->pdr0), &fi, &fd); + fi *= + decode_pll(readl(&ccm->mpctl), + CONFIG_MX35_HCLK_FREQ); + return fi / (arm_div * fd); +} + +static u32 get_ipg_clk(void) +{ + u32 freq = get_mcu_main_clk(); + struct ccm_regs *ccm = + (struct ccm_regs *)IMX_CCM_BASE; + u32 pdr0 = readl(&ccm->pdr0); + + return freq / (get_ahb_div(pdr0) * 2); +} + +static u32 get_ipg_per_clk(void) +{ + u32 freq = get_mcu_main_clk(); + struct ccm_regs *ccm = + (struct ccm_regs *)IMX_CCM_BASE; + u32 pdr0 = readl(&ccm->pdr0); + u32 pdr4 = readl(&ccm->pdr4); + u32 div; + if (pdr0 & MXC_CCM_PDR0_PER_SEL) { + div = (CCM_GET_DIVIDER(pdr4, + MXC_CCM_PDR4_PER0_PRDF_MASK, + MXC_CCM_PDR4_PER0_PODF_OFFSET) + 1) * + (CCM_GET_DIVIDER(pdr4, + MXC_CCM_PDR4_PER0_PODF_MASK, + MXC_CCM_PDR4_PER0_PODF_OFFSET) + 1); + } else { + div = CCM_GET_DIVIDER(pdr0, + MXC_CCM_PDR0_PER_PODF_MASK, + MXC_CCM_PDR0_PER_PODF_OFFSET) + 1; + freq /= get_ahb_div(pdr0); + } + return freq / div; +} + +u32 imx_get_uartclk(void) +{ + u32 freq; + struct ccm_regs *ccm = + (struct ccm_regs *)IMX_CCM_BASE; + u32 pdr4 = readl(&ccm->pdr4); + + if (readl(&ccm->pdr3) & MXC_CCM_PDR3_UART_M_U) { + freq = get_mcu_main_clk(); + } else { + freq = decode_pll(readl(&ccm->ppctl), + CONFIG_MX35_HCLK_FREQ); + } + freq /= ((CCM_GET_DIVIDER(pdr4, + MXC_CCM_PDR4_UART_PRDF_MASK, + MXC_CCM_PDR4_UART_PRDF_OFFSET) + 1) * + (CCM_GET_DIVIDER(pdr4, + MXC_CCM_PDR4_UART_PODF_MASK, + MXC_CCM_PDR4_UART_PODF_OFFSET) + 1)); + return freq; +} + +unsigned int mxc_get_main_clock(enum mxc_main_clocks clk) +{ + u32 nfc_pdf, hsp_podf; + u32 pll, ret_val = 0, usb_prdf, usb_podf; + struct ccm_regs *ccm = + (struct ccm_regs *)IMX_CCM_BASE; + + u32 reg = readl(&ccm->pdr0); + u32 reg4 = readl(&ccm->pdr4); + + reg |= 0x1; + + switch (clk) { + case CPU_CLK: + ret_val = get_mcu_main_clk(); + break; + case AHB_CLK: + ret_val = get_mcu_main_clk(); + break; + case HSP_CLK: + if (reg & CLKMODE_CONSUMER) { + hsp_podf = (reg >> 20) & 0x3; + pll = get_mcu_main_clk(); + hsp_podf = hsp_div_table[hsp_podf][(reg>>16)&0xF]; + if (hsp_podf > 0) { + ret_val = pll / hsp_podf; + } else { + puts("mismatch HSP with ARM clock setting\n"); + ret_val = 0; + } + } else { + ret_val = get_mcu_main_clk(); + } + break; + case IPG_CLK: + ret_val = get_ipg_clk();; + break; + case IPG_PER_CLK: + ret_val = get_ipg_per_clk(); + break; + case NFC_CLK: + nfc_pdf = (reg4 >> 28) & 0xF; + pll = get_mcu_main_clk(); + /* AHB/nfc_pdf */ + ret_val = pll / (nfc_pdf + 1); + break; + case USB_CLK: + usb_prdf = (reg4 >> 25) & 0x7; + usb_podf = (reg4 >> 22) & 0x7; + if (reg4 & 0x200) { + pll = get_mcu_main_clk(); + } else { + pll = decode_pll(readl(&ccm->ppctl), + CONFIG_MX35_HCLK_FREQ); + } + + ret_val = pll / ((usb_prdf + 1) * (usb_podf + 1)); + break; + default: + printf("Unknown clock: %d\n", clk); + break; + } + + return ret_val; +} +unsigned int mxc_get_peri_clock(enum mxc_peri_clocks clk) +{ + u32 ret_val = 0, pdf, pre_pdf, clk_sel; + struct ccm_regs *ccm = + (struct ccm_regs *)IMX_CCM_BASE; + u32 mpdr2 = readl(&ccm->pdr2); + u32 mpdr3 = readl(&ccm->pdr3); + u32 mpdr4 = readl(&ccm->pdr4); + + switch (clk) { + case UART1_BAUD: + case UART2_BAUD: + case UART3_BAUD: + clk_sel = mpdr3 & (1 << 14); + pre_pdf = (mpdr4 >> 13) & 0x7; + pdf = (mpdr4 >> 10) & 0x7; + ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) : + decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) / + ((pre_pdf + 1) * (pdf + 1)); + break; + case SSI1_BAUD: + pre_pdf = (mpdr2 >> 24) & 0x7; + pdf = mpdr2 & 0x3F; + clk_sel = mpdr2 & (1 << 6); + ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) : + decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) / + ((pre_pdf + 1) * (pdf + 1)); + break; + case SSI2_BAUD: + pre_pdf = (mpdr2 >> 27) & 0x7; + pdf = (mpdr2 >> 8) & 0x3F; + clk_sel = mpdr2 & (1 << 6); + ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) : + decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) / + ((pre_pdf + 1) * (pdf + 1)); + break; + case CSI_BAUD: + clk_sel = mpdr2 & (1 << 7); + pre_pdf = (mpdr2 >> 16) & 0x7; + pdf = (mpdr2 >> 19) & 0x7; + ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) : + decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) / + ((pre_pdf + 1) * (pdf + 1)); + break; + case MSHC_CLK: + pre_pdf = readl(&ccm->pdr1); + clk_sel = (pre_pdf & 0x80); + pdf = (pre_pdf >> 22) & 0x3F; + pre_pdf = (pre_pdf >> 28) & 0x7; + ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) : + decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) / + ((pre_pdf + 1) * (pdf + 1)); + break; + case ESDHC1_CLK: + clk_sel = mpdr3 & 0x40; + pre_pdf = mpdr3 & 0x7; + pdf = (mpdr3>>3) & 0x7; + ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) : + decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) / + ((pre_pdf + 1) * (pdf + 1)); + break; + case ESDHC2_CLK: + clk_sel = mpdr3 & 0x40; + pre_pdf = (mpdr3 >> 8) & 0x7; + pdf = (mpdr3 >> 11) & 0x7; + ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) : + decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) / + ((pre_pdf + 1) * (pdf + 1)); + break; + case ESDHC3_CLK: + clk_sel = mpdr3 & 0x40; + pre_pdf = (mpdr3 >> 16) & 0x7; + pdf = (mpdr3 >> 19) & 0x7; + ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) : + decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) / + ((pre_pdf + 1) * (pdf + 1)); + break; + case SPDIF_CLK: + clk_sel = mpdr3 & 0x400000; + pre_pdf = (mpdr3 >> 29) & 0x7; + pdf = (mpdr3 >> 23) & 0x3F; + ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) : + decode_pll(readl(&ccm->ppctl), CONFIG_MX35_HCLK_FREQ)) / + ((pre_pdf + 1) * (pdf + 1)); + break; + default: + printf("%s(): This clock: %d not supported yet\n", + __func__, clk); + break; + } + + return ret_val; +} + +unsigned int mxc_get_clock(enum mxc_clock clk) +{ + switch (clk) { + case MXC_ARM_CLK: + return get_mcu_main_clk(); + case MXC_AHB_CLK: + break; + case MXC_IPG_CLK: + return get_ipg_clk(); + case MXC_IPG_PERCLK: + return get_ipg_per_clk(); + case MXC_UART_CLK: + return imx_get_uartclk(); + case MXC_ESDHC_CLK: + return mxc_get_peri_clock(ESDHC1_CLK); + case MXC_USB_CLK: + return mxc_get_main_clock(USB_CLK); + case MXC_FEC_CLK: + return get_ipg_clk(); + case MXC_CSPI_CLK: + return get_ipg_clk(); + } + return -1; +} + +#ifdef CONFIG_FEC_MXC +/* + * The MX35 has no fuse for MAC, return a NULL MAC + */ +void imx_get_mac_from_fuse(unsigned char *mac) +{ + memset(mac, 0, 6); +} + +u32 imx_get_fecclk(void) +{ + return mxc_get_clock(MXC_IPG_CLK); +} +#endif + +int do_mx35_showclocks(cmd_tbl_t *cmdtp, + int flag, int argc, char * const argv[]) +{ + u32 cpufreq = get_mcu_main_clk(); + printf("mx35 cpu clock: %dMHz\n", cpufreq / 1000000); + printf("ipg clock : %dHz\n", get_ipg_clk()); + printf("ipg per clock : %dHz\n", get_ipg_per_clk()); + printf("uart clock : %dHz\n", mxc_get_clock(MXC_UART_CLK)); + + return 0; +} + +U_BOOT_CMD( + clockinfo, CONFIG_SYS_MAXARGS, 1, do_mx35_showclocks, + "display clocks\n", + "" +); + +#if defined(CONFIG_DISPLAY_CPUINFO) +int print_cpuinfo(void) +{ + printf("CPU: Freescale i.MX35 at %d MHz\n", + get_mcu_main_clk() / 1000000); + /* mxc_dump_clocks(); */ + return 0; +} +#endif + +/* + * Initializes on-chip ethernet controllers. + * to override, implement board_eth_init() + */ + +int cpu_eth_init(bd_t *bis) +{ + int rc = -ENODEV; + +#if defined(CONFIG_FEC_MXC) + rc = fecmxc_initialize(bis); +#endif + + return rc; +} + +int get_clocks(void) +{ +#ifdef CONFIG_FSL_ESDHC + gd->sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK); +#endif + return 0; +} + +void reset_cpu(ulong addr) +{ + struct wdog_regs *wdog = (struct wdog_regs *)WDOG_BASE_ADDR; + writew(4, &wdog->wcr); +} diff --git a/arch/arm/cpu/arm1136/mx35/iomux.c b/arch/arm/cpu/arm1136/mx35/iomux.c new file mode 100644 index 0000000..f93191d --- /dev/null +++ b/arch/arm/cpu/arm1136/mx35/iomux.c @@ -0,0 +1,116 @@ +/* + * Copyright 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved. + * + * 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/arch/imx-regs.h> +#include <asm/arch/mx35_pins.h> +#include <asm/arch/iomux.h> + +/* + * IOMUX register (base) addresses + */ +enum iomux_reg_addr { + IOMUXGPR = IOMUXC_BASE_ADDR, /* General purpose */ + IOMUXSW_MUX_CTL = IOMUXC_BASE_ADDR + 4, /* MUX control */ + IOMUXSW_MUX_END = IOMUXC_BASE_ADDR + 0x324, /* last MUX control */ + IOMUXSW_PAD_CTL = IOMUXC_BASE_ADDR + 0x328, /* Pad control */ + IOMUXSW_PAD_END = IOMUXC_BASE_ADDR + 0x794, /* last Pad control */ + IOMUXSW_INPUT_CTL = IOMUXC_BASE_ADDR + 0x7AC, /* input select */ + IOMUXSW_INPUT_END = IOMUXC_BASE_ADDR + 0x9F4, /* last input select */ +}; + +#define MUX_PIN_NUM_MAX \ + (((IOMUXSW_PAD_END - IOMUXSW_PAD_CTL) >> 2) + 1) +#define MUX_INPUT_NUM_MUX \ + (((IOMUXSW_INPUT_END - IOMUXSW_INPUT_CTL) >> 2) + 1) + +#define PIN_TO_IOMUX_INDEX(pin) ((PIN_TO_IOMUX_PAD(pin) - 0x328) >> 2) + +/* + * Request ownership for an IO pin. This function has to be the first one + * being called before that pin is used. + */ +void mxc_request_iomux(iomux_pin_name_t pin, iomux_pin_cfg_t cfg) +{ + u32 mux_reg = PIN_TO_IOMUX_MUX(pin); + + if (mux_reg != NON_MUX_I) { + mux_reg += IOMUXGPR; + writel(cfg, mux_reg); + } +} + +/* + * Release ownership for an IO pin + */ +void mxc_free_iomux(iomux_pin_name_t pin, iomux_pin_cfg_t cfg) +{ +} + +/* + * This function configures the pad value for a IOMUX pin. + * + * @param pin a pin number as defined in iomux_pin_name_t + * @param config the ORed value of elements defined in iomux_pad_config_t + */ +void mxc_iomux_set_pad(iomux_pin_name_t pin, u32 config) +{ + u32 pad_reg = IOMUXGPR + PIN_TO_IOMUX_PAD(pin); + + writel(config, pad_reg); +} + +/* + * This function enables/disables the general purpose function for a particular + * signal. + * + * @param gp one signal as defined in iomux_gp_func_t + * @param en enable/disable + */ +void mxc_iomux_set_gpr(iomux_gp_func_t gp, int en) +{ + u32 l; + + l = readl(IOMUXGPR); + if (en) + l |= gp; + else + l &= ~gp; + + writel(l, IOMUXGPR); +} + +/* + * This function configures input path. + * + * @param input index of input select register as defined in + * iomux_input_select_t + * @param config the binary value of elements defined in + * iomux_input_config_t + */ +void mxc_iomux_set_input(iomux_input_select_t input, u32 config) +{ + u32 reg = IOMUXSW_INPUT_CTL + (input << 2); + + writel(config, reg); +} diff --git a/arch/arm/cpu/arm1136/mx35/timer.c b/arch/arm/cpu/arm1136/mx35/timer.c new file mode 100644 index 0000000..db1e2c9 --- /dev/null +++ b/arch/arm/cpu/arm1136/mx35/timer.c @@ -0,0 +1,120 @@ +/* + * (C) Copyright 2007 + * Sascha Hauer, Pengutronix + * + * (C) Copyright 2008-2009 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/arch/imx-regs.h> + +/* General purpose timers bitfields */ +#define GPTCR_SWR (1<<15) /* Software reset */ +#define GPTCR_FRR (1<<9) /* Freerun / restart */ +#define GPTCR_CLKSOURCE_32 (0x100<<6) /* Clock source */ +#define GPTCR_CLKSOURCE_IPG (0x001<<6) /* Clock source */ +#define GPTCR_TEN (1) /* Timer enable */ +#define GPTPR_VAL (66) + +int timer_init(void) +{ + int i; + struct gpt_regs *gpt = (struct gpt_regs *)GPT1_BASE_ADDR; + + /* setup GP Timer 1 */ + writel(GPTCR_SWR, &gpt->ctrl); + for (i = 0; i < 100; i++) + writel(0, &gpt->ctrl); /* We have no udelay by now */ + + writel(GPTPR_VAL, &gpt->pre); + /* Freerun Mode, PERCLK1 input */ + writel(readl(&gpt->ctrl) | + GPTCR_CLKSOURCE_IPG | GPTCR_TEN, + &gpt->ctrl); + + return 0; +} + +void reset_timer_masked(void) +{ + struct gpt_regs *gpt = (struct gpt_regs *)GPT1_BASE_ADDR; + + writel(0, &gpt->ctrl); + /* Freerun Mode, PERCLK1 input */ + writel(GPTCR_CLKSOURCE_IPG | GPTCR_TEN, + &gpt->ctrl); +} + +inline ulong get_timer_masked(void) +{ + + struct gpt_regs *gpt = (struct gpt_regs *)GPT1_BASE_ADDR; + ulong val = readl(&gpt->counter); + + return val; +} + +void reset_timer(void) +{ + reset_timer_masked(); +} + +ulong get_timer(ulong base) +{ + ulong tmp; + + tmp = get_timer_masked(); + + if (tmp <= (base * 1000)) { + /* Overflow */ + tmp += (0xffffffff - base); + } + + return (tmp / 1000) - base; +} + +void set_timer(ulong t) +{ +} + +/* + * delay x useconds AND preserve advance timstamp value + * GPTCNT is now supposed to tick 1 by 1 us. + */ +void __udelay(unsigned long usec) +{ + ulong tmp; + + tmp = get_timer_masked(); /* get current timestamp */ + + /* if setting this forward will roll time stamp */ + if ((usec + tmp + 1) < tmp) { + /* reset "advancing" timestamp to 0, set lastinc value */ + reset_timer_masked(); + } else { + /* else, set advancing stamp wake up time */ + tmp += usec; + } + + while (get_timer_masked() < tmp) /* loop till event */ + /*NOP*/; +} |