/* * arch/arm/mach-kirkwood/common.c * * Core functions for Marvell Kirkwood SoCs * * This file is licensed under the terms of the GNU General Public * License version 2. This program is licensed "as is" without any * warranty of any kind, whether express or implied. */ #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 #include #include "common.h" /***************************************************************************** * I/O Address Mapping ****************************************************************************/ static struct map_desc kirkwood_io_desc[] __initdata = { { .virtual = (unsigned long) KIRKWOOD_REGS_VIRT_BASE, .pfn = __phys_to_pfn(KIRKWOOD_REGS_PHYS_BASE), .length = KIRKWOOD_REGS_SIZE, .type = MT_DEVICE, }, }; void __init kirkwood_map_io(void) { iotable_init(kirkwood_io_desc, ARRAY_SIZE(kirkwood_io_desc)); } /***************************************************************************** * CLK tree ****************************************************************************/ static void enable_sata0(void) { /* Enable PLL and IVREF */ writel(readl(SATA0_PHY_MODE_2) | 0xf, SATA0_PHY_MODE_2); /* Enable PHY */ writel(readl(SATA0_IF_CTRL) & ~0x200, SATA0_IF_CTRL); } static void disable_sata0(void) { /* Disable PLL and IVREF */ writel(readl(SATA0_PHY_MODE_2) & ~0xf, SATA0_PHY_MODE_2); /* Disable PHY */ writel(readl(SATA0_IF_CTRL) | 0x200, SATA0_IF_CTRL); } static void enable_sata1(void) { /* Enable PLL and IVREF */ writel(readl(SATA1_PHY_MODE_2) | 0xf, SATA1_PHY_MODE_2); /* Enable PHY */ writel(readl(SATA1_IF_CTRL) & ~0x200, SATA1_IF_CTRL); } static void disable_sata1(void) { /* Disable PLL and IVREF */ writel(readl(SATA1_PHY_MODE_2) & ~0xf, SATA1_PHY_MODE_2); /* Disable PHY */ writel(readl(SATA1_IF_CTRL) | 0x200, SATA1_IF_CTRL); } static void disable_pcie0(void) { writel(readl(PCIE_LINK_CTRL) | 0x10, PCIE_LINK_CTRL); while (1) if (readl(PCIE_STATUS) & 0x1) break; writel(readl(PCIE_LINK_CTRL) & ~0x10, PCIE_LINK_CTRL); } static void disable_pcie1(void) { u32 dev, rev; kirkwood_pcie_id(&dev, &rev); if (dev == MV88F6282_DEV_ID) { writel(readl(PCIE1_LINK_CTRL) | 0x10, PCIE1_LINK_CTRL); while (1) if (readl(PCIE1_STATUS) & 0x1) break; writel(readl(PCIE1_LINK_CTRL) & ~0x10, PCIE1_LINK_CTRL); } } /* An extended version of the gated clk. This calls fn_en()/fn_dis * before enabling/disabling the clock. We use this to turn on/off * PHYs etc. */ struct clk_gate_fn { struct clk_gate gate; void (*fn_en)(void); void (*fn_dis)(void); }; #define to_clk_gate_fn(_gate) container_of(_gate, struct clk_gate_fn, gate) #define to_clk_gate(_hw) container_of(_hw, struct clk_gate, hw) static int clk_gate_fn_enable(struct clk_hw *hw) { struct clk_gate *gate = to_clk_gate(hw); struct clk_gate_fn *gate_fn = to_clk_gate_fn(gate); int ret; ret = clk_gate_ops.enable(hw); if (!ret && gate_fn->fn_en) gate_fn->fn_en(); return ret; } static void clk_gate_fn_disable(struct clk_hw *hw) { struct clk_gate *gate = to_clk_gate(hw); struct clk_gate_fn *gate_fn = to_clk_gate_fn(gate); if (gate_fn->fn_dis) gate_fn->fn_dis(); clk_gate_ops.disable(hw); } static struct clk_ops clk_gate_fn_ops; static struct clk __init *clk_register_gate_fn(struct device *dev, const char *name, const char *parent_name, unsigned long flags, void __iomem *reg, u8 bit_idx, u8 clk_gate_flags, spinlock_t *lock, void (*fn_en)(void), void (*fn_dis)(void)) { struct clk_gate_fn *gate_fn; struct clk *clk; struct clk_init_data init; gate_fn = kzalloc(sizeof(struct clk_gate_fn), GFP_KERNEL); if (!gate_fn) { pr_err("%s: could not allocate gated clk\n", __func__); return ERR_PTR(-ENOMEM); } init.name = name; init.ops = &clk_gate_fn_ops; init.flags = flags; init.parent_names = (parent_name ? &parent_name : NULL); init.num_parents = (parent_name ? 1 : 0); /* struct clk_gate assignments */ gate_fn->gate.reg = reg; gate_fn->gate.bit_idx = bit_idx; gate_fn->gate.flags = clk_gate_flags; gate_fn->gate.lock = lock; gate_fn->gate.hw.init = &init; gate_fn->fn_en = fn_en; gate_fn->fn_dis = fn_dis; /* ops is the gate ops, but with our enable/disable functions */ if (clk_gate_fn_ops.enable != clk_gate_fn_enable || clk_gate_fn_ops.disable != clk_gate_fn_disable) { clk_gate_fn_ops = clk_gate_ops; clk_gate_fn_ops.enable = clk_gate_fn_enable; clk_gate_fn_ops.disable = clk_gate_fn_disable; } clk = clk_register(dev, &gate_fn->gate.hw); if (IS_ERR(clk)) kfree(gate_fn); return clk; } static DEFINE_SPINLOCK(gating_lock); static struct clk *tclk; static struct clk __init *kirkwood_register_gate(const char *name, u8 bit_idx) { return clk_register_gate(NULL, name, "tclk", 0, CLOCK_GATING_CTRL, bit_idx, 0, &gating_lock); } static struct clk __init *kirkwood_register_gate_fn(const char *name, u8 bit_idx, void (*fn_en)(void), void (*fn_dis)(void)) { return clk_register_gate_fn(NULL, name, "tclk", 0, CLOCK_GATING_CTRL, bit_idx, 0, &gating_lock, fn_en, fn_dis); } static struct clk *ge0, *ge1; void __init kirkwood_clk_init(void) { struct clk *runit, *sata0, *sata1, *usb0, *sdio; struct clk *crypto, *xor0, *xor1, *pex0, *pex1, *audio; tclk = clk_register_fixed_rate(NULL, "tclk", NULL, CLK_IS_ROOT, kirkwood_tclk); runit = kirkwood_register_gate("runit", CGC_BIT_RUNIT); ge0 = kirkwood_register_gate("ge0", CGC_BIT_GE0); ge1 = kirkwood_register_gate("ge1", CGC_BIT_GE1); sata0 = kirkwood_register_gate_fn("sata0", CGC_BIT_SATA0, enable_sata0, disable_sata0); sata1 = kirkwood_register_gate_fn("sata1", CGC_BIT_SATA1, enable_sata1, disable_sata1); usb0 = kirkwood_register_gate("usb0", CGC_BIT_USB0); sdio = kirkwood_register_gate("sdio", CGC_BIT_SDIO); crypto = kirkwood_register_gate("crypto", CGC_BIT_CRYPTO); xor0 = kirkwood_register_gate("xor0", CGC_BIT_XOR0); xor1 = kirkwood_register_gate("xor1", CGC_BIT_XOR1); pex0 = kirkwood_register_gate_fn("pex0", CGC_BIT_PEX0, NULL, disable_pcie0); pex1 = kirkwood_register_gate_fn("pex1", CGC_BIT_PEX1, NULL, disable_pcie1); audio = kirkwood_register_gate("audio", CGC_BIT_AUDIO); kirkwood_register_gate("tdm", CGC_BIT_TDM); kirkwood_register_gate("tsu", CGC_BIT_TSU); /* clkdev entries, mapping clks to devices */ orion_clkdev_add(NULL, "orion_spi.0", runit); orion_clkdev_add(NULL, "orion_spi.1", runit); orion_clkdev_add(NULL, MV643XX_ETH_NAME ".0", ge0); orion_clkdev_add(NULL, MV643XX_ETH_NAME ".1", ge1); orion_clkdev_add(NULL, "orion_wdt", tclk); orion_clkdev_add("0", "sata_mv.0", sata0); orion_clkdev_add("1", "sata_mv.0", sata1); orion_clkdev_add(NULL, "orion-ehci.0", usb0); orion_clkdev_add(NULL, "orion_nand", runit); orion_clkdev_add(NULL, "mvsdio", sdio); orion_clkdev_add(NULL, "mv_crypto", crypto); orion_clkdev_add(NULL, MV_XOR_SHARED_NAME ".0", xor0); orion_clkdev_add(NULL, MV_XOR_SHARED_NAME ".1", xor1); orion_clkdev_add("0", "pcie", pex0); orion_clkdev_add("1", "pcie", pex1); orion_clkdev_add(NULL, "kirkwood-i2s", audio); orion_clkdev_add(NULL, MV64XXX_I2C_CTLR_NAME ".0", runit); /* Marvell says runit is used by SPI, UART, NAND, TWSI, ..., * so should never be gated. */ clk_prepare_enable(runit); } /***************************************************************************** * EHCI0 ****************************************************************************/ void __init kirkwood_ehci_init(void) { orion_ehci_init(USB_PHYS_BASE, IRQ_KIRKWOOD_USB, EHCI_PHY_NA); } /***************************************************************************** * GE00 ****************************************************************************/ void __init kirkwood_ge00_init(struct mv643xx_eth_platform_data *eth_data) { orion_ge00_init(eth_data, GE00_PHYS_BASE, IRQ_KIRKWOOD_GE00_SUM, IRQ_KIRKWOOD_GE00_ERR, 1600); /* The interface forgets the MAC address assigned by u-boot if the clock is turned off, so claim the clk now. */ clk_prepare_enable(ge0); } /***************************************************************************** * GE01 ****************************************************************************/ void __init kirkwood_ge01_init(struct mv643xx_eth_platform_data *eth_data) { orion_ge01_init(eth_data, GE01_PHYS_BASE, IRQ_KIRKWOOD_GE01_SUM, IRQ_KIRKWOOD_GE01_ERR, 1600); clk_prepare_enable(ge1); } /***************************************************************************** * Ethernet switch ****************************************************************************/ void __init kirkwood_ge00_switch_init(struct dsa_platform_data *d, int irq) { orion_ge00_switch_init(d, irq); } /***************************************************************************** * NAND flash ****************************************************************************/ static struct resource kirkwood_nand_resource = { .flags = IORESOURCE_MEM, .start = KIRKWOOD_NAND_MEM_PHYS_BASE, .end = KIRKWOOD_NAND_MEM_PHYS_BASE + KIRKWOOD_NAND_MEM_SIZE - 1, }; static struct orion_nand_data kirkwood_nand_data = { .cle = 0, .ale = 1, .width = 8, }; static struct platform_device kirkwood_nand_flash = { .name = "orion_nand", .id = -1, .dev = { .platform_data = &kirkwood_nand_data, }, .resource = &kirkwood_nand_resource, .num_resources = 1, }; void __init kirkwood_nand_init(struct mtd_partition *parts, int nr_parts, int chip_delay) { kirkwood_nand_data.parts = parts; kirkwood_nand_data.nr_parts = nr_parts; kirkwood_nand_data.chip_delay = chip_delay; platform_device_register(&kirkwood_nand_flash); } void __init kirkwood_nand_init_rnb(struct mtd_partition *parts, int nr_parts, int (*dev_ready)(struct mtd_info *)) { kirkwood_nand_data.parts = parts; kirkwood_nand_data.nr_parts = nr_parts; kirkwood_nand_data.dev_ready = dev_ready; platform_device_register(&kirkwood_nand_flash); } /***************************************************************************** * SoC RTC ****************************************************************************/ static void __init kirkwood_rtc_init(void) { orion_rtc_init(RTC_PHYS_BASE, IRQ_KIRKWOOD_RTC); } /***************************************************************************** * SATA ****************************************************************************/ void __init kirkwood_sata_init(struct mv_sata_platform_data *sata_data) { orion_sata_init(sata_data, SATA_PHYS_BASE, IRQ_KIRKWOOD_SATA); } /***************************************************************************** * SD/SDIO/MMC ****************************************************************************/ static struct resource mvsdio_resources[] = { [0] = { .start = SDIO_PHYS_BASE, .end = SDIO_PHYS_BASE + SZ_1K - 1, .flags = IORESOURCE_MEM, }, [1] = { .start = IRQ_KIRKWOOD_SDIO, .end = IRQ_KIRKWOOD_SDIO, .flags = IORESOURCE_IRQ, }, }; static u64 mvsdio_dmamask = DMA_BIT_MASK(32); static struct platform_device kirkwood_sdio = { .name = "mvsdio", .id = -1, .dev = { .dma_mask = &mvsdio_dmamask, .coherent_dma_mask = DMA_BIT_MASK(32), }, .num_resources = ARRAY_SIZE(mvsdio_resources), .resource = mvsdio_resources, }; void __init kirkwood_sdio_init(struct mvsdio_platform_data *mvsdio_data) { u32 dev, rev; kirkwood_pcie_id(&dev, &rev); if (rev == 0 && dev != MV88F6282_DEV_ID) /* catch all Kirkwood Z0's */ mvsdio_data->clock = 100000000; else mvsdio_data->clock = 200000000; kirkwood_sdio.dev.platform_data = mvsdio_data; platform_device_register(&kirkwood_sdio); } /***************************************************************************** * SPI ****************************************************************************/ void __init kirkwood_spi_init(void) { orion_spi_init(SPI_PHYS_BASE); } /***************************************************************************** * I2C ****************************************************************************/ void __init kirkwood_i2c_init(void) { orion_i2c_init(I2C_PHYS_BASE, IRQ_KIRKWOOD_TWSI, 8); } /***************************************************************************** * UART0 ****************************************************************************/ void __init kirkwood_uart0_init(void) { orion_uart0_init(UART0_VIRT_BASE, UART0_PHYS_BASE, IRQ_KIRKWOOD_UART_0, tclk); } /***************************************************************************** * UART1 ****************************************************************************/ void __init kirkwood_uart1_init(void) { orion_uart1_init(UART1_VIRT_BASE, UART1_PHYS_BASE, IRQ_KIRKWOOD_UART_1, tclk); } /***************************************************************************** * Cryptographic Engines and Security Accelerator (CESA) ****************************************************************************/ void __init kirkwood_crypto_init(void) { orion_crypto_init(CRYPTO_PHYS_BASE, KIRKWOOD_SRAM_PHYS_BASE, KIRKWOOD_SRAM_SIZE, IRQ_KIRKWOOD_CRYPTO); } /***************************************************************************** * XOR0 ****************************************************************************/ void __init kirkwood_xor0_init(void) { orion_xor0_init(XOR0_PHYS_BASE, XOR0_HIGH_PHYS_BASE, IRQ_KIRKWOOD_XOR_00, IRQ_KIRKWOOD_XOR_01); } /***************************************************************************** * XOR1 ****************************************************************************/ void __init kirkwood_xor1_init(void) { orion_xor1_init(XOR1_PHYS_BASE, XOR1_HIGH_PHYS_BASE, IRQ_KIRKWOOD_XOR_10, IRQ_KIRKWOOD_XOR_11); } /***************************************************************************** * Watchdog ****************************************************************************/ void __init kirkwood_wdt_init(void) { orion_wdt_init(); } /***************************************************************************** * Time handling ****************************************************************************/ void __init kirkwood_init_early(void) { orion_time_set_base(TIMER_VIRT_BASE); /* * Some Kirkwood devices allocate their coherent buffers from atomic * context. Increase size of atomic coherent pool to make sure such * the allocations won't fail. */ init_dma_coherent_pool_size(SZ_1M); } int kirkwood_tclk; static int __init kirkwood_find_tclk(void) { u32 dev, rev; kirkwood_pcie_id(&dev, &rev); if (dev == MV88F6281_DEV_ID || dev == MV88F6282_DEV_ID) if (((readl(SAMPLE_AT_RESET) >> 21) & 1) == 0) return 200000000; return 166666667; } static void __init kirkwood_timer_init(void) { kirkwood_tclk = kirkwood_find_tclk(); orion_time_init(BRIDGE_VIRT_BASE, BRIDGE_INT_TIMER1_CLR, IRQ_KIRKWOOD_BRIDGE, kirkwood_tclk); } struct sys_timer kirkwood_timer = { .init = kirkwood_timer_init, }; /***************************************************************************** * Audio ****************************************************************************/ static struct resource kirkwood_i2s_resources[] = { [0] = { .start = AUDIO_PHYS_BASE, .end = AUDIO_PHYS_BASE + SZ_16K - 1, .flags = IORESOURCE_MEM, }, [1] = { .start = IRQ_KIRKWOOD_I2S, .end = IRQ_KIRKWOOD_I2S, .flags = IORESOURCE_IRQ, }, }; static struct kirkwood_asoc_platform_data kirkwood_i2s_data = { .burst = 128, }; static struct platform_device kirkwood_i2s_device = { .name = "kirkwood-i2s", .id = -1, .num_resources = ARRAY_SIZE(kirkwood_i2s_resources), .resource = kirkwood_i2s_resources, .dev = { .platform_data = &kirkwood_i2s_data, }, }; static struct platform_device kirkwood_pcm_device = { .name = "kirkwood-pcm-audio", .id = -1, }; void __init kirkwood_audio_init(void) { platform_device_register(&kirkwood_i2s_device); platform_device_register(&kirkwood_pcm_device); } /***************************************************************************** * General ****************************************************************************/ /* * Identify device ID and revision. */ char * __init kirkwood_id(void) { u32 dev, rev; kirkwood_pcie_id(&dev, &rev); if (dev == MV88F6281_DEV_ID) { if (rev == MV88F6281_REV_Z0) return "MV88F6281-Z0"; else if (rev == MV88F6281_REV_A0) return "MV88F6281-A0"; else if (rev == MV88F6281_REV_A1) return "MV88F6281-A1"; else return "MV88F6281-Rev-Unsupported"; } else if (dev == MV88F6192_DEV_ID) { if (rev == MV88F6192_REV_Z0) return "MV88F6192-Z0"; else if (rev == MV88F6192_REV_A0) return "MV88F6192-A0"; else if (rev == MV88F6192_REV_A1) return "MV88F6192-A1"; else return "MV88F6192-Rev-Unsupported"; } else if (dev == MV88F6180_DEV_ID) { if (rev == MV88F6180_REV_A0) return "MV88F6180-Rev-A0"; else if (rev == MV88F6180_REV_A1) return "MV88F6180-Rev-A1"; else return "MV88F6180-Rev-Unsupported"; } else if (dev == MV88F6282_DEV_ID) { if (rev == MV88F6282_REV_A0) return "MV88F6282-Rev-A0"; else if (rev == MV88F6282_REV_A1) return "MV88F6282-Rev-A1"; else return "MV88F6282-Rev-Unsupported"; } else { return "Device-Unknown"; } } void __init kirkwood_l2_init(void) { #ifdef CONFIG_CACHE_FEROCEON_L2 #ifdef CONFIG_CACHE_FEROCEON_L2_WRITETHROUGH writel(readl(L2_CONFIG_REG) | L2_WRITETHROUGH, L2_CONFIG_REG); feroceon_l2_init(1); #else writel(readl(L2_CONFIG_REG) & ~L2_WRITETHROUGH, L2_CONFIG_REG); feroceon_l2_init(0); #endif #endif } void __init kirkwood_init(void) { printk(KERN_INFO "Kirkwood: %s, TCLK=%d.\n", kirkwood_id(), kirkwood_tclk); /* * Disable propagation of mbus errors to the CPU local bus, * as this causes mbus errors (which can occur for example * for PCI aborts) to throw CPU aborts, which we're not set * up to deal with. */ writel(readl(CPU_CONFIG) & ~CPU_CONFIG_ERROR_PROP, CPU_CONFIG); kirkwood_setup_cpu_mbus(); kirkwood_l2_init(); /* Setup root of clk tree */ kirkwood_clk_init(); /* internal devices that every board has */ kirkwood_rtc_init(); kirkwood_wdt_init(); kirkwood_xor0_init(); kirkwood_xor1_init(); kirkwood_crypto_init(); #ifdef CONFIG_KEXEC kexec_reinit = kirkwood_enable_pcie; #endif } void kirkwood_restart(char mode, const char *cmd) { /* * Enable soft reset to assert RSTOUTn. */ writel(SOFT_RESET_OUT_EN, RSTOUTn_MASK); /* * Assert soft reset. */ writel(SOFT_RESET, SYSTEM_SOFT_RESET); while (1) ; }