/* * Copyright 2011-2014 Freescale Semiconductor, Inc. * Copyright 2011 Linaro Ltd. * * The code contained herein is licensed under the GNU General Public * License. You may obtain a copy of the GNU General Public License * Version 2 or later at the following locations: * * http://www.opensource.org/licenses/gpl-license.html * http://www.gnu.org/copyleft/gpl.html */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "common.h" #include "hardware.h" #define CCR 0x0 #define BM_CCR_WB_COUNT (0x7 << 16) #define BM_CCR_RBC_BYPASS_COUNT (0x3f << 21) #define BM_CCR_RBC_EN (0x1 << 27) #define CLPCR 0x54 #define BP_CLPCR_LPM 0 #define BM_CLPCR_LPM (0x3 << 0) #define BM_CLPCR_BYPASS_PMIC_READY (0x1 << 2) #define BM_CLPCR_ARM_CLK_DIS_ON_LPM (0x1 << 5) #define BM_CLPCR_SBYOS (0x1 << 6) #define BM_CLPCR_DIS_REF_OSC (0x1 << 7) #define BM_CLPCR_VSTBY (0x1 << 8) #define BP_CLPCR_STBY_COUNT 9 #define BM_CLPCR_STBY_COUNT (0x3 << 9) #define BM_CLPCR_COSC_PWRDOWN (0x1 << 11) #define BM_CLPCR_WB_PER_AT_LPM (0x1 << 16) #define BM_CLPCR_WB_CORE_AT_LPM (0x1 << 17) #define BM_CLPCR_BYP_MMDC_CH0_LPM_HS (0x1 << 19) #define BM_CLPCR_BYP_MMDC_CH1_LPM_HS (0x1 << 21) #define BM_CLPCR_MASK_CORE0_WFI (0x1 << 22) #define BM_CLPCR_MASK_CORE1_WFI (0x1 << 23) #define BM_CLPCR_MASK_CORE2_WFI (0x1 << 24) #define BM_CLPCR_MASK_CORE3_WFI (0x1 << 25) #define BM_CLPCR_MASK_SCU_IDLE (0x1 << 26) #define BM_CLPCR_MASK_L2CC_IDLE (0x1 << 27) #define CGPR 0x64 #define BM_CGPR_INT_MEM_CLK_LPM (0x1 << 17) #define CCGR4 0x78 #define CCGR6 0x80 #define MX6Q_SUSPEND_OCRAM_SIZE 0x1000 #define MX6_MAX_MMDC_IO_NUM 33 #define MX6_MAX_MMDC_NUM 34 #define ROMC_ROMPATCH0D 0xf0 #define ROMC_ROMPATCHCNTL 0xf4 #define ROMC_ROMPATCHENL 0xfc #define ROMC_ROMPATCH0A 0x100 #define BM_ROMPATCHCNTL_0D (0x1 << 0) #define BM_ROMPATCHCNTL_DIS (0x1 << 29) #define BM_ROMPATCHENL_0D (0x1 << 0) #define ROM_ADDR_FOR_INTERNAL_RAM_BASE 0x10d7c #define UART_UCR1 0x80 #define UART_UCR2 0x84 #define UART_UCR3 0x88 #define UART_UCR4 0x8c #define UART_UFCR 0x90 #define UART_UESC 0x9c #define UART_UTIM 0xa0 #define UART_UBIR 0xa4 #define UART_UBMR 0xa8 #define UART_UBRC 0xac #define UART_UTS 0xb4 /* QSPI register layout */ #define QSPI_MCR 0x00 #define QSPI_IPCR 0x08 #define QSPI_BUF0CR 0x10 #define QSPI_BUF1CR 0x14 #define QSPI_BUF2CR 0x18 #define QSPI_BUF3CR 0x1c #define QSPI_BFGENCR 0x20 #define QSPI_BUF0IND 0x30 #define QSPI_BUF1IND 0x34 #define QSPI_BUF2IND 0x38 #define QSPI_SFAR 0x100 #define QSPI_SMPR 0x108 #define QSPI_RBSR 0x10c #define QSPI_RBCT 0x110 #define QSPI_TBSR 0x150 #define QSPI_TBDR 0x154 #define QSPI_SFA1AD 0x180 #define QSPI_SFA2AD 0x184 #define QSPI_SFB1AD 0x188 #define QSPI_SFB2AD 0x18c #define QSPI_RBDR_BASE 0x200 #define QSPI_LUTKEY 0x300 #define QSPI_LCKCR 0x304 #define QSPI_LUT_BASE 0x310 #define QSPI_RBDR_(x) (QSPI_RBDR_BASE + (x) * 4) #define QSPI_LUT(x) (QSPI_LUT_BASE + (x) * 4) #define QSPI_LUTKEY_VALUE 0x5AF05AF0 #define QSPI_LCKER_LOCK 0x1 #define QSPI_LCKER_UNLOCK 0x2 enum qspi_regs_valuetype { QSPI_PREDEFINED, QSPI_RETRIEVED, }; struct qspi_regs { int offset; unsigned int value; enum qspi_regs_valuetype valuetype; }; struct qspi_regs qspi_regs_imx6sx[] = { {QSPI_IPCR, 0, QSPI_RETRIEVED}, {QSPI_BUF0CR, 0, QSPI_RETRIEVED}, {QSPI_BUF1CR, 0, QSPI_RETRIEVED}, {QSPI_BUF2CR, 0, QSPI_RETRIEVED}, {QSPI_BUF3CR, 0, QSPI_RETRIEVED}, {QSPI_BFGENCR, 0, QSPI_RETRIEVED}, {QSPI_BUF0IND, 0, QSPI_RETRIEVED}, {QSPI_BUF1IND, 0, QSPI_RETRIEVED}, {QSPI_BUF2IND, 0, QSPI_RETRIEVED}, {QSPI_SFAR, 0, QSPI_RETRIEVED}, {QSPI_SMPR, 0, QSPI_RETRIEVED}, {QSPI_RBSR, 0, QSPI_RETRIEVED}, {QSPI_RBCT, 0, QSPI_RETRIEVED}, {QSPI_TBSR, 0, QSPI_RETRIEVED}, {QSPI_TBDR, 0, QSPI_RETRIEVED}, {QSPI_SFA1AD, 0, QSPI_RETRIEVED}, {QSPI_SFA2AD, 0, QSPI_RETRIEVED}, {QSPI_SFB1AD, 0, QSPI_RETRIEVED}, {QSPI_SFB2AD, 0, QSPI_RETRIEVED}, {QSPI_RBDR_(0), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(1), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(2), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(3), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(4), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(5), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(6), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(7), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(8), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(9), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(10), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(11), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(12), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(13), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(14), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(15), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(16), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(17), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(18), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(19), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(20), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(21), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(22), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(23), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(24), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(25), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(26), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(27), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(28), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(29), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(30), 0, QSPI_RETRIEVED}, {QSPI_RBDR_(31), 0, QSPI_RETRIEVED}, {QSPI_LUTKEY, QSPI_LUTKEY_VALUE, QSPI_PREDEFINED}, {QSPI_LCKCR, QSPI_LCKER_UNLOCK, QSPI_PREDEFINED}, {QSPI_LUT(0), 0, QSPI_RETRIEVED}, {QSPI_LUT(1), 0, QSPI_RETRIEVED}, {QSPI_LUT(2), 0, QSPI_RETRIEVED}, {QSPI_LUT(3), 0, QSPI_RETRIEVED}, {QSPI_LUT(4), 0, QSPI_RETRIEVED}, {QSPI_LUT(5), 0, QSPI_RETRIEVED}, {QSPI_LUT(6), 0, QSPI_RETRIEVED}, {QSPI_LUT(7), 0, QSPI_RETRIEVED}, {QSPI_LUT(8), 0, QSPI_RETRIEVED}, {QSPI_LUT(9), 0, QSPI_RETRIEVED}, {QSPI_LUT(10), 0, QSPI_RETRIEVED}, {QSPI_LUT(11), 0, QSPI_RETRIEVED}, {QSPI_LUT(12), 0, QSPI_RETRIEVED}, {QSPI_LUT(13), 0, QSPI_RETRIEVED}, {QSPI_LUT(14), 0, QSPI_RETRIEVED}, {QSPI_LUT(15), 0, QSPI_RETRIEVED}, {QSPI_LUT(16), 0, QSPI_RETRIEVED}, {QSPI_LUT(17), 0, QSPI_RETRIEVED}, {QSPI_LUT(18), 0, QSPI_RETRIEVED}, {QSPI_LUT(19), 0, QSPI_RETRIEVED}, {QSPI_LUT(20), 0, QSPI_RETRIEVED}, {QSPI_LUT(21), 0, QSPI_RETRIEVED}, {QSPI_LUT(22), 0, QSPI_RETRIEVED}, {QSPI_LUT(23), 0, QSPI_RETRIEVED}, {QSPI_LUT(24), 0, QSPI_RETRIEVED}, {QSPI_LUT(25), 0, QSPI_RETRIEVED}, {QSPI_LUT(26), 0, QSPI_RETRIEVED}, {QSPI_LUT(27), 0, QSPI_RETRIEVED}, {QSPI_LUT(28), 0, QSPI_RETRIEVED}, {QSPI_LUT(29), 0, QSPI_RETRIEVED}, {QSPI_LUT(30), 0, QSPI_RETRIEVED}, {QSPI_LUT(31), 0, QSPI_RETRIEVED}, {QSPI_LUT(32), 0, QSPI_RETRIEVED}, {QSPI_LUT(33), 0, QSPI_RETRIEVED}, {QSPI_LUT(34), 0, QSPI_RETRIEVED}, {QSPI_LUT(35), 0, QSPI_RETRIEVED}, {QSPI_LUT(36), 0, QSPI_RETRIEVED}, {QSPI_LUT(37), 0, QSPI_RETRIEVED}, {QSPI_LUT(38), 0, QSPI_RETRIEVED}, {QSPI_LUT(39), 0, QSPI_RETRIEVED}, {QSPI_LUT(40), 0, QSPI_RETRIEVED}, {QSPI_LUT(41), 0, QSPI_RETRIEVED}, {QSPI_LUT(42), 0, QSPI_RETRIEVED}, {QSPI_LUT(43), 0, QSPI_RETRIEVED}, {QSPI_LUT(44), 0, QSPI_RETRIEVED}, {QSPI_LUT(45), 0, QSPI_RETRIEVED}, {QSPI_LUT(46), 0, QSPI_RETRIEVED}, {QSPI_LUT(47), 0, QSPI_RETRIEVED}, {QSPI_LUT(48), 0, QSPI_RETRIEVED}, {QSPI_LUT(49), 0, QSPI_RETRIEVED}, {QSPI_LUT(50), 0, QSPI_RETRIEVED}, {QSPI_LUT(51), 0, QSPI_RETRIEVED}, {QSPI_LUT(52), 0, QSPI_RETRIEVED}, {QSPI_LUT(53), 0, QSPI_RETRIEVED}, {QSPI_LUT(54), 0, QSPI_RETRIEVED}, {QSPI_LUT(55), 0, QSPI_RETRIEVED}, {QSPI_LUT(56), 0, QSPI_RETRIEVED}, {QSPI_LUT(57), 0, QSPI_RETRIEVED}, {QSPI_LUT(58), 0, QSPI_RETRIEVED}, {QSPI_LUT(59), 0, QSPI_RETRIEVED}, {QSPI_LUT(60), 0, QSPI_RETRIEVED}, {QSPI_LUT(61), 0, QSPI_RETRIEVED}, {QSPI_LUT(62), 0, QSPI_RETRIEVED}, {QSPI_LUT(63), 0, QSPI_RETRIEVED}, {QSPI_LUTKEY, QSPI_LUTKEY_VALUE, QSPI_PREDEFINED}, {QSPI_LCKCR, QSPI_LCKER_LOCK, QSPI_PREDEFINED}, {QSPI_MCR, 0, QSPI_RETRIEVED}, }; unsigned long iram_tlb_base_addr; unsigned long iram_tlb_phys_addr; static unsigned int *ocram_saved_in_ddr; static void __iomem *ocram_base; static void __iomem *console_base; static void __iomem *qspi_base; static unsigned int ocram_size; static void __iomem *ccm_base; static void __iomem *suspend_ocram_base; static void (*imx6_suspend_in_ocram_fn)(void __iomem *ocram_vbase); struct regmap *romcp; /* * suspend ocram space layout: * ======================== high address ====================== * . * . * . * ^ * ^ * ^ * imx6_suspend code * PM_INFO structure(imx6_cpu_pm_info) * ======================== low address ======================= */ struct imx6_pm_base { phys_addr_t pbase; void __iomem *vbase; }; struct imx6_pm_socdata { u32 ddr_type; const char *mmdc_compat; const char *src_compat; const char *iomuxc_compat; const char *gpc_compat; const u32 mmdc_io_num; const u32 *mmdc_io_offset; const u32 mmdc_num; const u32 *mmdc_offset; }; static const u32 imx6q_mmdc_io_offset[] __initconst = { 0x5ac, 0x5b4, 0x528, 0x520, /* DQM0 ~ DQM3 */ 0x514, 0x510, 0x5bc, 0x5c4, /* DQM4 ~ DQM7 */ 0x56c, 0x578, 0x588, 0x594, /* CAS, RAS, SDCLK_0, SDCLK_1 */ 0x5a8, 0x5b0, 0x524, 0x51c, /* SDQS0 ~ SDQS3 */ 0x518, 0x50c, 0x5b8, 0x5c0, /* SDQS4 ~ SDQS7 */ 0x784, 0x788, 0x794, 0x79c, /* GPR_B0DS ~ GPR_B3DS */ 0x7a0, 0x7a4, 0x7a8, 0x748, /* GPR_B4DS ~ GPR_B7DS */ 0x59c, 0x5a0, 0x750, 0x774, /* SODT0, SODT1, MODE_CTL, MODE */ 0x74c, /* GPR_ADDS */ }; static const u32 imx6dl_mmdc_io_offset[] __initconst = { 0x470, 0x474, 0x478, 0x47c, /* DQM0 ~ DQM3 */ 0x480, 0x484, 0x488, 0x48c, /* DQM4 ~ DQM7 */ 0x464, 0x490, 0x4ac, 0x4b0, /* CAS, RAS, SDCLK_0, SDCLK_1 */ 0x4bc, 0x4c0, 0x4c4, 0x4c8, /* DRAM_SDQS0 ~ DRAM_SDQS3 */ 0x4cc, 0x4d0, 0x4d4, 0x4d8, /* DRAM_SDQS4 ~ DRAM_SDQS7 */ 0x764, 0x770, 0x778, 0x77c, /* GPR_B0DS ~ GPR_B3DS */ 0x780, 0x784, 0x78c, 0x748, /* GPR_B4DS ~ GPR_B7DS */ 0x4b4, 0x4b8, 0x750, 0x760, /* SODT0, SODT1, MODE_CTL, MODE */ 0x74c, /* GPR_ADDS */ }; static const u32 imx6sl_mmdc_io_offset[] __initconst = { 0x30c, 0x310, 0x314, 0x318, /* DQM0 ~ DQM3 */ 0x5c4, 0x5cc, 0x5d4, 0x5d8, /* GPR_B0DS ~ GPR_B3DS */ 0x300, 0x31c, 0x338, 0x5ac, /* CAS, RAS, SDCLK_0, GPR_ADDS */ 0x33c, 0x340, 0x5b0, 0x5c0, /* SODT0, SODT1, MODE_CTL, MODE */ 0x330, 0x334, 0x320, /* SDCKE0, SDCKE1, RESET */ }; static const u32 imx6sx_mmdc_io_offset[] __initconst = { 0x2ec, 0x2f0, 0x2f4, 0x2f8, /* DQM0 ~ DQM3 */ 0x60c, 0x610, 0x61c, 0x620, /* GPR_B0DS ~ GPR_B3DS */ 0x300, 0x2fc, 0x32c, 0x5f4, /* CAS, RAS, SDCLK_0, GPR_ADDS */ 0x310, 0x314, 0x5f8, 0x608, /* SODT0, SODT1, MODE_CTL, MODE */ 0x330, 0x334, 0x338, 0x33c, /* SDQS0 ~ SDQS3 */ }; static const u32 imx6sx_mmdc_offset[] __initconst = { 0x800, 0x80c, 0x810, 0x83c, 0x840, 0x848, 0x850, 0x81c, 0x820, 0x824, 0x828, 0x8b8, 0x004, 0x008, 0x00c, 0x010, 0x014, 0x018, 0x01c, 0x02c, 0x030, 0x040, 0x000, 0x01c, 0x020, 0x818, 0x01c, }; static const struct imx6_pm_socdata imx6q_pm_data __initconst = { .mmdc_compat = "fsl,imx6q-mmdc", .src_compat = "fsl,imx6q-src", .iomuxc_compat = "fsl,imx6q-iomuxc", .gpc_compat = "fsl,imx6q-gpc", .mmdc_io_num = ARRAY_SIZE(imx6q_mmdc_io_offset), .mmdc_io_offset = imx6q_mmdc_io_offset, .mmdc_num = 0, .mmdc_offset = NULL, }; static const struct imx6_pm_socdata imx6dl_pm_data __initconst = { .mmdc_compat = "fsl,imx6q-mmdc", .src_compat = "fsl,imx6q-src", .iomuxc_compat = "fsl,imx6dl-iomuxc", .gpc_compat = "fsl,imx6q-gpc", .mmdc_io_num = ARRAY_SIZE(imx6dl_mmdc_io_offset), .mmdc_io_offset = imx6dl_mmdc_io_offset, .mmdc_num = 0, .mmdc_offset = NULL, }; static const struct imx6_pm_socdata imx6sl_pm_data __initconst = { .mmdc_compat = "fsl,imx6sl-mmdc", .src_compat = "fsl,imx6sl-src", .iomuxc_compat = "fsl,imx6sl-iomuxc", .gpc_compat = "fsl,imx6sl-gpc", .mmdc_io_num = ARRAY_SIZE(imx6sl_mmdc_io_offset), .mmdc_io_offset = imx6sl_mmdc_io_offset, .mmdc_num = 0, .mmdc_offset = NULL, }; static const struct imx6_pm_socdata imx6sx_pm_data __initconst = { .mmdc_compat = "fsl,imx6sx-mmdc", .src_compat = "fsl,imx6sx-src", .iomuxc_compat = "fsl,imx6sx-iomuxc", .gpc_compat = "fsl,imx6sx-gpc", .mmdc_io_num = ARRAY_SIZE(imx6sx_mmdc_io_offset), .mmdc_io_offset = imx6sx_mmdc_io_offset, .mmdc_num = ARRAY_SIZE(imx6sx_mmdc_offset), .mmdc_offset = imx6sx_mmdc_offset, }; /* * This structure is for passing necessary data for low level ocram * suspend code(arch/arm/mach-imx/suspend-imx6.S), if this struct * definition is changed, the offset definition in * arch/arm/mach-imx/suspend-imx6.S must be also changed accordingly, * otherwise, the suspend to ocram function will be broken! */ struct imx6_cpu_pm_info { phys_addr_t pbase; /* The physical address of pm_info. */ phys_addr_t resume_addr; /* The physical resume address for asm code */ u32 ddr_type; u32 pm_info_size; /* Size of pm_info. */ struct imx6_pm_base mmdc_base; struct imx6_pm_base src_base; struct imx6_pm_base iomuxc_base; struct imx6_pm_base ccm_base; struct imx6_pm_base gpc_base; struct imx6_pm_base l2_base; struct imx6_pm_base anatop_base; u32 ttbr1; /* Store TTBR1 */ u32 mmdc_io_num; /* Number of MMDC IOs which need saved/restored. */ u32 mmdc_io_val[MX6_MAX_MMDC_IO_NUM][2]; /* To save offset and value */ u32 mmdc_num; /* Number of MMDC registers which need saved/restored. */ u32 mmdc_val[MX6_MAX_MMDC_NUM][2]; /* To save offset and value */ } __aligned(8); unsigned long save_ttbr1(void) { unsigned long lttbr1; asm volatile( ".align 4\n" "mrc p15, 0, %0, c2, c0, 1\n" : "=r" (lttbr1) ); return lttbr1; } void restore_ttbr1(unsigned long ttbr1) { asm volatile( ".align 4\n" "mcr p15, 0, %0, c2, c0, 1\n" : : "r" (ttbr1) ); } void imx6q_set_int_mem_clk_lpm(bool enable) { if ((cpu_is_imx6q() && imx_get_soc_revision() > IMX_CHIP_REVISION_1_1) || (cpu_is_imx6dl() && imx_get_soc_revision() > IMX_CHIP_REVISION_1_0) || cpu_is_imx6sx()) { u32 val; val = readl_relaxed(ccm_base + CGPR); if (enable) val |= BM_CGPR_INT_MEM_CLK_LPM; else val &= ~BM_CGPR_INT_MEM_CLK_LPM; writel_relaxed(val, ccm_base + CGPR); } } void imx6q_enable_rbc(bool enable) { u32 val; /* * need to mask all interrupts in GPC before * operating RBC configurations */ imx_gpc_mask_all(); /* configure RBC enable bit */ val = readl_relaxed(ccm_base + CCR); val &= ~BM_CCR_RBC_EN; val |= enable ? BM_CCR_RBC_EN : 0; writel_relaxed(val, ccm_base + CCR); /* configure RBC count */ val = readl_relaxed(ccm_base + CCR); val &= ~BM_CCR_RBC_BYPASS_COUNT; val |= enable ? BM_CCR_RBC_BYPASS_COUNT : 0; writel(val, ccm_base + CCR); /* * need to delay at least 2 cycles of CKIL(32K) * due to hardware design requirement, which is * ~61us, here we use 65us for safe */ udelay(65); /* restore GPC interrupt mask settings */ imx_gpc_restore_all(); } static void imx6q_enable_wb(bool enable) { u32 val; /* configure well bias enable bit */ val = readl_relaxed(ccm_base + CLPCR); val &= ~BM_CLPCR_WB_PER_AT_LPM; val |= enable ? BM_CLPCR_WB_PER_AT_LPM : 0; writel_relaxed(val, ccm_base + CLPCR); /* configure well bias count */ val = readl_relaxed(ccm_base + CCR); val &= ~BM_CCR_WB_COUNT; val |= enable ? BM_CCR_WB_COUNT : 0; writel_relaxed(val, ccm_base + CCR); } int imx6q_set_lpm(enum mxc_cpu_pwr_mode mode) { struct irq_desc *iomuxc_irq_desc; u32 val = readl_relaxed(ccm_base + CLPCR); val &= ~BM_CLPCR_LPM; switch (mode) { case WAIT_CLOCKED: break; case WAIT_UNCLOCKED: val |= 0x1 << BP_CLPCR_LPM; val |= BM_CLPCR_ARM_CLK_DIS_ON_LPM; break; case STOP_POWER_ON: val |= 0x2 << BP_CLPCR_LPM; val &= ~BM_CLPCR_VSTBY; val &= ~BM_CLPCR_SBYOS; if (cpu_is_imx6sl()) val |= BM_CLPCR_BYPASS_PMIC_READY; if (cpu_is_imx6sl() || cpu_is_imx6sx()) val |= BM_CLPCR_BYP_MMDC_CH0_LPM_HS; else val |= BM_CLPCR_BYP_MMDC_CH1_LPM_HS; break; case WAIT_UNCLOCKED_POWER_OFF: val |= 0x1 << BP_CLPCR_LPM; val &= ~BM_CLPCR_VSTBY; val &= ~BM_CLPCR_SBYOS; break; case STOP_POWER_OFF: val |= 0x2 << BP_CLPCR_LPM; val |= 0x3 << BP_CLPCR_STBY_COUNT; val |= BM_CLPCR_VSTBY; val |= BM_CLPCR_SBYOS; if (cpu_is_imx6sl()) val |= BM_CLPCR_BYPASS_PMIC_READY; if (cpu_is_imx6sl() || cpu_is_imx6sx()) val |= BM_CLPCR_BYP_MMDC_CH0_LPM_HS; else val |= BM_CLPCR_BYP_MMDC_CH1_LPM_HS; break; default: return -EINVAL; } /* * ERR007265: CCM: When improper low-power sequence is used, * the SoC enters low power mode before the ARM core executes WFI. * * Software workaround: * 1) Software should trigger IRQ #32 (IOMUX) to be always pending * by setting IOMUX_GPR1_GINT. * 2) Software should then unmask IRQ #32 in GPC before setting CCM * Low-Power mode. * 3) Software should mask IRQ #32 right after CCM Low-Power mode * is set (set bits 0-1 of CCM_CLPCR). */ iomuxc_irq_desc = irq_to_desc(32); imx_gpc_irq_unmask(&iomuxc_irq_desc->irq_data); writel_relaxed(val, ccm_base + CLPCR); imx_gpc_irq_mask(&iomuxc_irq_desc->irq_data); return 0; } static int imx6q_suspend_finish(unsigned long val) { if (!imx6_suspend_in_ocram_fn) { cpu_do_idle(); } else { /* * call low level suspend function in ocram, * as we need to float DDR IO. */ local_flush_tlb_all(); imx6_suspend_in_ocram_fn(suspend_ocram_base); } return 0; } static void imx6_console_save(unsigned int *regs) { if (!console_base) return; regs[0] = readl_relaxed(console_base + UART_UCR1); regs[1] = readl_relaxed(console_base + UART_UCR2); regs[2] = readl_relaxed(console_base + UART_UCR3); regs[3] = readl_relaxed(console_base + UART_UCR4); regs[4] = readl_relaxed(console_base + UART_UFCR); regs[5] = readl_relaxed(console_base + UART_UESC); regs[6] = readl_relaxed(console_base + UART_UTIM); regs[7] = readl_relaxed(console_base + UART_UBIR); regs[8] = readl_relaxed(console_base + UART_UBMR); regs[9] = readl_relaxed(console_base + UART_UBRC); regs[10] = readl_relaxed(console_base + UART_UTS); } static void imx6_console_restore(unsigned int *regs) { if (!console_base) return; writel_relaxed(regs[4], console_base + UART_UFCR); writel_relaxed(regs[5], console_base + UART_UESC); writel_relaxed(regs[6], console_base + UART_UTIM); writel_relaxed(regs[7], console_base + UART_UBIR); writel_relaxed(regs[8], console_base + UART_UBMR); writel_relaxed(regs[9], console_base + UART_UBRC); writel_relaxed(regs[10], console_base + UART_UTS); writel_relaxed(regs[0], console_base + UART_UCR1); writel_relaxed(regs[1] | 0x1, console_base + UART_UCR2); writel_relaxed(regs[2], console_base + UART_UCR3); writel_relaxed(regs[3], console_base + UART_UCR4); } static void imx6_qspi_save(struct qspi_regs *pregs, int reg_num) { int i; if (!qspi_base) return; for (i = 0; i < reg_num; i++) { if (QSPI_RETRIEVED == pregs[i].valuetype) pregs[i].value = readl_relaxed(qspi_base + pregs[i].offset); } } static void imx6_qspi_restore(struct qspi_regs *pregs, int reg_num) { int i; if (!qspi_base) return; for (i = 0; i < reg_num; i++) writel_relaxed(pregs[i].value, qspi_base + pregs[i].offset); } static int imx6q_pm_enter(suspend_state_t state) { unsigned int console_saved_reg[11] = {0}; static unsigned int ccm_ccgr4, ccm_ccgr6; if (imx_src_is_m4_enabled()) { if (imx_gpc_is_m4_sleeping() && imx_mu_is_m4_in_low_freq()) { imx_gpc_hold_m4_in_sleep(); imx_mu_enable_m4_irqs_in_gic(true); } else { pr_info("M4 is busy, enter WAIT mode instead of STOP!\n"); imx6q_set_lpm(WAIT_UNCLOCKED); imx6q_set_int_mem_clk_lpm(true); imx_gpc_pre_suspend(false); /* Zzz ... */ cpu_do_idle(); imx_gpc_post_resume(); imx6q_set_lpm(WAIT_CLOCKED); return 0; } } if (!iram_tlb_base_addr) { pr_warn("No IRAM/OCRAM memory allocated for suspend/resume \ code. Please ensure device tree has an entry for \ fsl,lpm-sram.\n"); return -EINVAL; } switch (state) { case PM_SUSPEND_STANDBY: imx6q_set_lpm(STOP_POWER_ON); imx6q_set_int_mem_clk_lpm(true); imx_gpc_pre_suspend(false); if (cpu_is_imx6sl()) imx6sl_set_wait_clk(true); /* Zzz ... */ cpu_do_idle(); if (cpu_is_imx6sl()) imx6sl_set_wait_clk(false); imx_gpc_post_resume(); imx6q_set_lpm(WAIT_CLOCKED); break; case PM_SUSPEND_MEM: imx6q_set_lpm(STOP_POWER_OFF); imx6q_set_int_mem_clk_lpm(false); imx6q_enable_wb(true); /* * For suspend into ocram, asm code already take care of * RBC setting, so we do NOT need to do that here. */ if (!imx6_suspend_in_ocram_fn) imx6q_enable_rbc(true); imx_gpc_pre_suspend(true); imx_anatop_pre_suspend(); imx_set_cpu_jump(0, v7_cpu_resume); if (cpu_is_imx6sx() && imx_gpc_is_mf_mix_off()) { ccm_ccgr4 = readl_relaxed(ccm_base + CCGR4); ccm_ccgr6 = readl_relaxed(ccm_base + CCGR6); /* * i.MX6SX RDC needs PCIe and eim clk to be enabled * if Mega/Fast off, it is better to check cpu type * and whether Mega/Fast is off in this suspend flow, * but we need to add cpu type check for 3 places which * will increase code size, so here we just do it * for all cases, as when STOP mode is entered, CCM * hardware will gate all clocks, so it will NOT impact * any function or power. */ writel_relaxed(ccm_ccgr4 | (0x3 << 0), ccm_base + CCGR4); writel_relaxed(ccm_ccgr6 | (0x3 << 10), ccm_base + CCGR6); memcpy(ocram_saved_in_ddr, ocram_base, ocram_size); imx6_console_save(console_saved_reg); if (imx_src_is_m4_enabled()) imx6_qspi_save(qspi_regs_imx6sx, sizeof(qspi_regs_imx6sx) / sizeof(struct qspi_regs)); } /* Zzz ... */ cpu_suspend(0, imx6q_suspend_finish); if (cpu_is_imx6sx() && imx_gpc_is_mf_mix_off()) { writel_relaxed(ccm_ccgr4, ccm_base + CCGR4); writel_relaxed(ccm_ccgr6, ccm_base + CCGR6); memcpy(ocram_base, ocram_saved_in_ddr, ocram_size); imx6_console_restore(console_saved_reg); if (imx_src_is_m4_enabled()) imx6_qspi_restore(qspi_regs_imx6sx, sizeof(qspi_regs_imx6sx) / sizeof(struct qspi_regs)); } if (cpu_is_imx6q() || cpu_is_imx6dl()) imx_smp_prepare(); imx_anatop_post_resume(); imx_gpc_post_resume(); imx6q_enable_rbc(false); imx6q_enable_wb(false); imx6q_set_int_mem_clk_lpm(true); imx6q_set_lpm(WAIT_CLOCKED); break; default: return -EINVAL; } if (imx_src_is_m4_enabled()) { imx_mu_enable_m4_irqs_in_gic(false); imx_gpc_release_m4_in_sleep(); } return 0; } static int imx6q_pm_valid(suspend_state_t state) { return (state == PM_SUSPEND_STANDBY || state == PM_SUSPEND_MEM); } static const struct platform_suspend_ops imx6q_pm_ops = { .enter = imx6q_pm_enter, .valid = imx6q_pm_valid, }; void __init imx6q_pm_set_ccm_base(void __iomem *base) { ccm_base = base; } static struct map_desc iram_tlb_io_desc __initdata = { /* .virtual and .pfn are run-time assigned */ .length = SZ_1M, .type = MT_MEMORY_RWX_NONCACHED, }; static const char * const low_power_ocram_match[] __initconst = { "fsl,lpm-sram", NULL }; static int __init imx6_dt_find_lpsram(unsigned long node, const char *uname, int depth, void *data) { unsigned long lpram_addr; __be32 *prop; if (of_flat_dt_match(node, low_power_ocram_match)) { prop = of_get_flat_dt_prop(node, "reg", NULL); if (!prop) return -EINVAL; lpram_addr = be32_to_cpup(prop); /* We need to create a 1M page table entry. */ iram_tlb_io_desc.virtual = IMX_IO_P2V(lpram_addr & 0xFFF00000); iram_tlb_io_desc.pfn = __phys_to_pfn(lpram_addr & 0xFFF00000); iram_tlb_phys_addr = lpram_addr; iram_tlb_base_addr = IMX_IO_P2V(lpram_addr); iotable_init(&iram_tlb_io_desc, 1); } return 0; } /* * AIPS1 and AIPS2 is not used, because it will trigger a BUG_ON if * lowlevel debug and earlyprintk are configured. * * it is because there is a vm conflict because UART1 is mapped early if * AIPS1 is mapped using 1M size. * * Thus no use AIPS1 and AIPS2 to avoid kernel BUG_ON. */ static struct map_desc imx6_pm_io_desc[] __initdata = { imx_map_entry(MX6Q, MMDC_P0, MT_DEVICE), imx_map_entry(MX6Q, MMDC_P1, MT_DEVICE), imx_map_entry(MX6Q, SRC, MT_DEVICE), imx_map_entry(MX6Q, IOMUXC, MT_DEVICE), imx_map_entry(MX6Q, CCM, MT_DEVICE), imx_map_entry(MX6Q, ANATOP, MT_DEVICE), imx_map_entry(MX6Q, GPC, MT_DEVICE), imx_map_entry(MX6Q, L2, MT_DEVICE), imx_map_entry(MX6Q, SEMA4, MT_DEVICE), }; void __init imx6_pm_map_io(void) { unsigned long i; iotable_init(imx6_pm_io_desc, ARRAY_SIZE(imx6_pm_io_desc)); /* * Get the address of IRAM or OCRAM to be used by the low * power code from the device tree. */ WARN_ON(of_scan_flat_dt(imx6_dt_find_lpsram, NULL)); /* Return if no IRAM space is allocated for suspend/resume code. */ if (!iram_tlb_base_addr) { pr_warn("No IRAM/OCRAM memory allocated for suspend/resume \ code. Please ensure device tree has an entry for \ fsl,lpm-sram.\n"); return; } /* Set all entries to 0. */ memset((void *)iram_tlb_base_addr, 0, MX6Q_IRAM_TLB_SIZE); /* * Make sure the IRAM virtual address has a mapping in the IRAM * page table. * * Only use the top 11 bits [31-20] when storing the physical * address in the page table as only these bits are required * for 1M mapping. */ i = ((iram_tlb_base_addr >> 20) << 2) / 4; *((unsigned long *)iram_tlb_base_addr + i) = (iram_tlb_phys_addr & 0xFFF00000) | TT_ATTRIB_NON_CACHEABLE_1M; /* * Make sure the AIPS1 virtual address has a mapping in the * IRAM page table. */ i = ((IMX_IO_P2V(MX6Q_AIPS1_BASE_ADDR) >> 20) << 2) / 4; *((unsigned long *)iram_tlb_base_addr + i) = (MX6Q_AIPS1_BASE_ADDR & 0xFFF00000) | TT_ATTRIB_NON_CACHEABLE_1M; /* * Make sure the AIPS2 virtual address has a mapping in the * IRAM page table. */ i = ((IMX_IO_P2V(MX6Q_AIPS2_BASE_ADDR) >> 20) << 2) / 4; *((unsigned long *)iram_tlb_base_addr + i) = (MX6Q_AIPS2_BASE_ADDR & 0xFFF00000) | TT_ATTRIB_NON_CACHEABLE_1M; /* * Make sure the AIPS3 virtual address has a mapping * in the IRAM page table. */ i = ((IMX_IO_P2V(MX6Q_AIPS3_BASE_ADDR) >> 20) << 2) / 4; *((unsigned long *)iram_tlb_base_addr + i) = (MX6Q_AIPS3_BASE_ADDR & 0xFFF00000) | TT_ATTRIB_NON_CACHEABLE_1M; /* * Make sure the L2 controller virtual address has a mapping * in the IRAM page table. */ i = ((IMX_IO_P2V(MX6Q_L2_BASE_ADDR) >> 20) << 2) / 4; *((unsigned long *)iram_tlb_base_addr + i) = (MX6Q_L2_BASE_ADDR & 0xFFF00000) | TT_ATTRIB_NON_CACHEABLE_1M; } static int __init imx6q_suspend_init(const struct imx6_pm_socdata *socdata) { struct device_node *node; struct imx6_cpu_pm_info *pm_info; int i, ret = 0; const u32 *mmdc_io_offset_array; const u32 *mmdc_offset_array; unsigned long iram_paddr; suspend_set_ops(&imx6q_pm_ops); if (!socdata) { pr_warn("%s: invalid argument!\n", __func__); return -EINVAL; } /* * 16KB is allocated for IRAM TLB, but only up 8k is for kernel TLB, * The lower 8K is not used, so use the lower 8K for IRAM code and * pm_info. * */ iram_paddr = iram_tlb_phys_addr + MX6_SUSPEND_IRAM_ADDR_OFFSET; /* Make sure iram_paddr is 8 byte aligned. */ if ((uintptr_t)(iram_paddr) & (FNCPY_ALIGN - 1)) iram_paddr += FNCPY_ALIGN - iram_paddr % (FNCPY_ALIGN); /* Get the virtual address of the suspend code. */ suspend_ocram_base = (void *)IMX_IO_P2V(iram_paddr); pm_info = suspend_ocram_base; /* pbase points to iram_paddr. */ pm_info->pbase = iram_paddr; pm_info->resume_addr = virt_to_phys(v7_cpu_resume); pm_info->pm_info_size = sizeof(*pm_info); /* * ccm physical address is not used by asm code currently, * so get ccm virtual address directly, as we already have * it from ccm driver. */ pm_info->ccm_base.pbase = MX6Q_CCM_BASE_ADDR; pm_info->ccm_base.vbase = (void __iomem *) IMX_IO_P2V(MX6Q_CCM_BASE_ADDR); pm_info->mmdc_base.pbase = MX6Q_MMDC_P0_BASE_ADDR; pm_info->mmdc_base.vbase = (void __iomem *) IMX_IO_P2V(MX6Q_MMDC_P0_BASE_ADDR); pm_info->src_base.pbase = MX6Q_SRC_BASE_ADDR; pm_info->src_base.vbase = (void __iomem *) IMX_IO_P2V(MX6Q_SRC_BASE_ADDR); pm_info->iomuxc_base.pbase = MX6Q_IOMUXC_BASE_ADDR; pm_info->iomuxc_base.vbase = (void __iomem *) IMX_IO_P2V(MX6Q_IOMUXC_BASE_ADDR); pm_info->gpc_base.pbase = MX6Q_GPC_BASE_ADDR; pm_info->gpc_base.vbase = (void __iomem *) IMX_IO_P2V(MX6Q_GPC_BASE_ADDR); pm_info->l2_base.pbase = MX6Q_L2_BASE_ADDR; pm_info->l2_base.vbase = (void __iomem *) IMX_IO_P2V(MX6Q_L2_BASE_ADDR); pm_info->anatop_base.pbase = MX6Q_ANATOP_BASE_ADDR; pm_info->anatop_base.vbase = (void __iomem *) IMX_IO_P2V(MX6Q_ANATOP_BASE_ADDR); pm_info->ddr_type = imx_mmdc_get_ddr_type(); pm_info->mmdc_io_num = socdata->mmdc_io_num; mmdc_io_offset_array = socdata->mmdc_io_offset; pm_info->mmdc_num = socdata->mmdc_num; mmdc_offset_array = socdata->mmdc_offset; /* initialize MMDC IO settings */ for (i = 0; i < pm_info->mmdc_io_num; i++) { pm_info->mmdc_io_val[i][0] = mmdc_io_offset_array[i]; pm_info->mmdc_io_val[i][1] = readl_relaxed(pm_info->iomuxc_base.vbase + mmdc_io_offset_array[i]); } /* initialize MMDC settings */ for (i = 0; i < pm_info->mmdc_num; i++) { pm_info->mmdc_val[i][0] = mmdc_offset_array[i]; pm_info->mmdc_val[i][1] = readl_relaxed(pm_info->mmdc_base.vbase + mmdc_offset_array[i]); } /* need to overwrite the value for some mmdc registers */ if (cpu_is_imx6sx()) { pm_info->mmdc_val[20][1] = (pm_info->mmdc_val[20][1] & 0xffff0000) | 0x0202; pm_info->mmdc_val[23][1] = 0x8033; } imx6_suspend_in_ocram_fn = fncpy( suspend_ocram_base + sizeof(*pm_info), &imx6_suspend, MX6Q_SUSPEND_OCRAM_SIZE - sizeof(*pm_info)); goto put_node; put_node: of_node_put(node); return ret; } static void __init imx6_pm_common_init(const struct imx6_pm_socdata *socdata) { struct regmap *gpr; int ret; WARN_ON(!ccm_base); if (IS_ENABLED(CONFIG_SUSPEND)) { ret = imx6q_suspend_init(socdata); if (ret) pr_warn("%s: No DDR LPM support with suspend %d!\n", __func__, ret); } /* * This is for SW workaround step #1 of ERR007265, see comments * in imx6q_set_lpm for details of this errata. * Force IOMUXC irq pending, so that the interrupt to GPC can be * used to deassert dsm_request signal when the signal gets * asserted unexpectedly. */ gpr = syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr"); if (!IS_ERR(gpr)) regmap_update_bits(gpr, IOMUXC_GPR1, IMX6Q_GPR1_GINT, IMX6Q_GPR1_GINT); } void __init imx6q_pm_init(void) { imx6_pm_common_init(&imx6q_pm_data); } void imx6_stop_mode_poweroff(void) { imx6q_set_lpm(STOP_POWER_OFF); cpu_do_idle(); } void __init imx6dl_pm_init(void) { imx6_pm_common_init(&imx6dl_pm_data); #ifndef CONFIG_POWER_RESET_GPIO /* * if no specific power off function in board file, power off system by * SNVS */ if (!pm_power_off) if (of_machine_is_compatible("toradex,colibri_imx6dl")) pm_power_off = imx6_stop_mode_poweroff; #endif } void __init imx6sl_pm_init(void) { imx6_pm_common_init(&imx6sl_pm_data); } void __init imx6sx_pm_init(void) { struct device_node *np; struct resource res; imx6_pm_common_init(&imx6sx_pm_data); if (imx_get_soc_revision() < IMX_CHIP_REVISION_1_2) { /* * As there is a 16K OCRAM(start from 0x8f8000) * dedicated for low power function on i.MX6SX, * but ROM did NOT do the ocram address change * accordingly, so we need to add a data patch * to workaround this issue, otherwise, system * will fail to resume from DSM mode. TO1.2 fixes * this issue. */ romcp = syscon_regmap_lookup_by_compatible( "fsl,imx6sx-romcp"); if (IS_ERR(romcp)) { pr_err("failed to find fsl,imx6sx-romcp regmap\n"); return; } regmap_write(romcp, ROMC_ROMPATCH0D, iram_tlb_phys_addr); regmap_update_bits(romcp, ROMC_ROMPATCHCNTL, BM_ROMPATCHCNTL_0D, BM_ROMPATCHCNTL_0D); regmap_update_bits(romcp, ROMC_ROMPATCHENL, BM_ROMPATCHENL_0D, BM_ROMPATCHENL_0D); regmap_write(romcp, ROMC_ROMPATCH0A, ROM_ADDR_FOR_INTERNAL_RAM_BASE); regmap_update_bits(romcp, ROMC_ROMPATCHCNTL, BM_ROMPATCHCNTL_DIS, ~BM_ROMPATCHCNTL_DIS); } np = of_find_compatible_node(NULL, NULL, "fsl,mega-fast-sram"); ocram_base = of_iomap(np, 0); WARN_ON(!ocram_base); WARN_ON(of_address_to_resource(np, 0, &res)); ocram_size = resource_size(&res); ocram_saved_in_ddr = kzalloc(ocram_size, GFP_KERNEL); WARN_ON(!ocram_saved_in_ddr); np = of_find_node_by_path( "/soc/aips-bus@02000000/spba-bus@02000000/serial@02020000"); if (np) console_base = of_iomap(np, 0); if (imx_src_is_m4_enabled()) { np = of_find_compatible_node(NULL, NULL, "fsl,imx6sx-qspi-m4-restore"); if (np) qspi_base = of_iomap(np, 0); WARN_ON(!qspi_base); } }