/* * MPC8610 HPCD board specific routines * * Initial author: Xianghua Xiao <x.xiao@freescale.com> * Recode: Jason Jin <jason.jin@freescale.com> * York Sun <yorksun@freescale.com> * * Rewrite the interrupt routing. remove the 8259PIC support, * All the integrated device in ULI use sideband interrupt. * * Copyright 2008 Freescale Semiconductor Inc. * * 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 <linux/stddef.h> #include <linux/kernel.h> #include <linux/pci.h> #include <linux/interrupt.h> #include <linux/kdev_t.h> #include <linux/delay.h> #include <linux/seq_file.h> #include <linux/of.h> #include <asm/time.h> #include <asm/machdep.h> #include <asm/pci-bridge.h> #include <asm/prom.h> #include <mm/mmu_decl.h> #include <asm/udbg.h> #include <asm/mpic.h> #include <linux/of_platform.h> #include <sysdev/fsl_pci.h> #include <sysdev/fsl_soc.h> #include <sysdev/simple_gpio.h> #include <asm/fsl_guts.h> #include "mpc86xx.h" static struct device_node *pixis_node; static unsigned char *pixis_bdcfg0, *pixis_arch; /* DIU Pixel Clock bits of the CLKDVDR Global Utilities register */ #define CLKDVDR_PXCKEN 0x80000000 #define CLKDVDR_PXCKINV 0x10000000 #define CLKDVDR_PXCKDLY 0x06000000 #define CLKDVDR_PXCLK_MASK 0x001F0000 #ifdef CONFIG_SUSPEND static irqreturn_t mpc8610_sw9_irq(int irq, void *data) { pr_debug("%s: PIXIS' event (sw9/wakeup) IRQ handled\n", __func__); return IRQ_HANDLED; } static void __init mpc8610_suspend_init(void) { int irq; int ret; if (!pixis_node) return; irq = irq_of_parse_and_map(pixis_node, 0); if (!irq) { pr_err("%s: can't map pixis event IRQ.\n", __func__); return; } ret = request_irq(irq, mpc8610_sw9_irq, 0, "sw9:wakeup", NULL); if (ret) { pr_err("%s: can't request pixis event IRQ: %d\n", __func__, ret); irq_dispose_mapping(irq); } enable_irq_wake(irq); } #else static inline void mpc8610_suspend_init(void) { } #endif /* CONFIG_SUSPEND */ static const struct of_device_id mpc8610_ids[] __initconst = { { .compatible = "fsl,mpc8610-immr", }, { .compatible = "fsl,mpc8610-guts", }, { .compatible = "simple-bus", }, /* So that the DMA channel nodes can be probed individually: */ { .compatible = "fsl,eloplus-dma", }, /* PCI controllers */ { .compatible = "fsl,mpc8610-pci", }, { .compatible = "fsl,mpc8641-pcie", }, {} }; static int __init mpc8610_declare_of_platform_devices(void) { /* Firstly, register PIXIS GPIOs. */ simple_gpiochip_init("fsl,fpga-pixis-gpio-bank"); /* Enable wakeup on PIXIS' event IRQ. */ mpc8610_suspend_init(); /* Without this call, the SSI device driver won't get probed. */ of_platform_bus_probe(NULL, mpc8610_ids, NULL); return 0; } machine_arch_initcall(mpc86xx_hpcd, mpc8610_declare_of_platform_devices); #if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE) /* * DIU Area Descriptor * * The MPC8610 reference manual shows the bits of the AD register in * little-endian order, which causes the BLUE_C field to be split into two * parts. To simplify the definition of the MAKE_AD() macro, we define the * fields in big-endian order and byte-swap the result. * * So even though the registers don't look like they're in the * same bit positions as they are on the P1022, the same value is written to * the AD register on the MPC8610 and on the P1022. */ #define AD_BYTE_F 0x10000000 #define AD_ALPHA_C_MASK 0x0E000000 #define AD_ALPHA_C_SHIFT 25 #define AD_BLUE_C_MASK 0x01800000 #define AD_BLUE_C_SHIFT 23 #define AD_GREEN_C_MASK 0x00600000 #define AD_GREEN_C_SHIFT 21 #define AD_RED_C_MASK 0x00180000 #define AD_RED_C_SHIFT 19 #define AD_PALETTE 0x00040000 #define AD_PIXEL_S_MASK 0x00030000 #define AD_PIXEL_S_SHIFT 16 #define AD_COMP_3_MASK 0x0000F000 #define AD_COMP_3_SHIFT 12 #define AD_COMP_2_MASK 0x00000F00 #define AD_COMP_2_SHIFT 8 #define AD_COMP_1_MASK 0x000000F0 #define AD_COMP_1_SHIFT 4 #define AD_COMP_0_MASK 0x0000000F #define AD_COMP_0_SHIFT 0 #define MAKE_AD(alpha, red, blue, green, size, c0, c1, c2, c3) \ cpu_to_le32(AD_BYTE_F | (alpha << AD_ALPHA_C_SHIFT) | \ (blue << AD_BLUE_C_SHIFT) | (green << AD_GREEN_C_SHIFT) | \ (red << AD_RED_C_SHIFT) | (c3 << AD_COMP_3_SHIFT) | \ (c2 << AD_COMP_2_SHIFT) | (c1 << AD_COMP_1_SHIFT) | \ (c0 << AD_COMP_0_SHIFT) | (size << AD_PIXEL_S_SHIFT)) u32 mpc8610hpcd_get_pixel_format(enum fsl_diu_monitor_port port, unsigned int bits_per_pixel) { static const u32 pixelformat[][3] = { { MAKE_AD(3, 0, 2, 1, 3, 8, 8, 8, 8), MAKE_AD(4, 2, 0, 1, 2, 8, 8, 8, 0), MAKE_AD(4, 0, 2, 1, 1, 5, 6, 5, 0) }, { MAKE_AD(3, 2, 0, 1, 3, 8, 8, 8, 8), MAKE_AD(4, 0, 2, 1, 2, 8, 8, 8, 0), MAKE_AD(4, 2, 0, 1, 1, 5, 6, 5, 0) }, }; unsigned int arch_monitor; /* The DVI port is mis-wired on revision 1 of this board. */ arch_monitor = ((*pixis_arch == 0x01) && (port == FSL_DIU_PORT_DVI)) ? 0 : 1; switch (bits_per_pixel) { case 32: return pixelformat[arch_monitor][0]; case 24: return pixelformat[arch_monitor][1]; case 16: return pixelformat[arch_monitor][2]; default: pr_err("fsl-diu: unsupported pixel depth %u\n", bits_per_pixel); return 0; } } void mpc8610hpcd_set_gamma_table(enum fsl_diu_monitor_port port, char *gamma_table_base) { int i; if (port == FSL_DIU_PORT_DLVDS) { for (i = 0; i < 256*3; i++) gamma_table_base[i] = (gamma_table_base[i] << 2) | ((gamma_table_base[i] >> 6) & 0x03); } } #define PX_BRDCFG0_DVISEL (1 << 3) #define PX_BRDCFG0_DLINK (1 << 4) #define PX_BRDCFG0_DIU_MASK (PX_BRDCFG0_DVISEL | PX_BRDCFG0_DLINK) void mpc8610hpcd_set_monitor_port(enum fsl_diu_monitor_port port) { switch (port) { case FSL_DIU_PORT_DVI: clrsetbits_8(pixis_bdcfg0, PX_BRDCFG0_DIU_MASK, PX_BRDCFG0_DVISEL | PX_BRDCFG0_DLINK); break; case FSL_DIU_PORT_LVDS: clrsetbits_8(pixis_bdcfg0, PX_BRDCFG0_DIU_MASK, PX_BRDCFG0_DLINK); break; case FSL_DIU_PORT_DLVDS: clrbits8(pixis_bdcfg0, PX_BRDCFG0_DIU_MASK); break; } } /** * mpc8610hpcd_set_pixel_clock: program the DIU's clock * * @pixclock: the wavelength, in picoseconds, of the clock */ void mpc8610hpcd_set_pixel_clock(unsigned int pixclock) { struct device_node *guts_np = NULL; struct ccsr_guts __iomem *guts; unsigned long freq; u64 temp; u32 pxclk; /* Map the global utilities registers. */ guts_np = of_find_compatible_node(NULL, NULL, "fsl,mpc8610-guts"); if (!guts_np) { pr_err("mpc8610hpcd: missing global utilities device node\n"); return; } guts = of_iomap(guts_np, 0); of_node_put(guts_np); if (!guts) { pr_err("mpc8610hpcd: could not map global utilities device\n"); return; } /* Convert pixclock from a wavelength to a frequency */ temp = 1000000000000ULL; do_div(temp, pixclock); freq = temp; /* * 'pxclk' is the ratio of the platform clock to the pixel clock. * On the MPC8610, the value programmed into CLKDVDR is the ratio * minus one. The valid range of values is 2-31. */ pxclk = DIV_ROUND_CLOSEST(fsl_get_sys_freq(), freq) - 1; pxclk = clamp_t(u32, pxclk, 2, 31); /* Disable the pixel clock, and set it to non-inverted and no delay */ clrbits32(&guts->clkdvdr, CLKDVDR_PXCKEN | CLKDVDR_PXCKDLY | CLKDVDR_PXCLK_MASK); /* Enable the clock and set the pxclk */ setbits32(&guts->clkdvdr, CLKDVDR_PXCKEN | (pxclk << 16)); iounmap(guts); } enum fsl_diu_monitor_port mpc8610hpcd_valid_monitor_port(enum fsl_diu_monitor_port port) { return port; } #endif static void __init mpc86xx_hpcd_setup_arch(void) { struct resource r; unsigned char *pixis; if (ppc_md.progress) ppc_md.progress("mpc86xx_hpcd_setup_arch()", 0); fsl_pci_assign_primary(); #if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE) diu_ops.get_pixel_format = mpc8610hpcd_get_pixel_format; diu_ops.set_gamma_table = mpc8610hpcd_set_gamma_table; diu_ops.set_monitor_port = mpc8610hpcd_set_monitor_port; diu_ops.set_pixel_clock = mpc8610hpcd_set_pixel_clock; diu_ops.valid_monitor_port = mpc8610hpcd_valid_monitor_port; #endif pixis_node = of_find_compatible_node(NULL, NULL, "fsl,fpga-pixis"); if (pixis_node) { of_address_to_resource(pixis_node, 0, &r); of_node_put(pixis_node); pixis = ioremap(r.start, 32); if (!pixis) { printk(KERN_ERR "Err: can't map FPGA cfg register!\n"); return; } pixis_bdcfg0 = pixis + 8; pixis_arch = pixis + 1; } else printk(KERN_ERR "Err: " "can't find device node 'fsl,fpga-pixis'\n"); printk("MPC86xx HPCD board from Freescale Semiconductor\n"); } /* * Called very early, device-tree isn't unflattened */ static int __init mpc86xx_hpcd_probe(void) { unsigned long root = of_get_flat_dt_root(); if (of_flat_dt_is_compatible(root, "fsl,MPC8610HPCD")) return 1; /* Looks good */ return 0; } static long __init mpc86xx_time_init(void) { unsigned int temp; /* Set the time base to zero */ mtspr(SPRN_TBWL, 0); mtspr(SPRN_TBWU, 0); temp = mfspr(SPRN_HID0); temp |= HID0_TBEN; mtspr(SPRN_HID0, temp); asm volatile("isync"); return 0; } define_machine(mpc86xx_hpcd) { .name = "MPC86xx HPCD", .probe = mpc86xx_hpcd_probe, .setup_arch = mpc86xx_hpcd_setup_arch, .init_IRQ = mpc86xx_init_irq, .get_irq = mpic_get_irq, .restart = fsl_rstcr_restart, .time_init = mpc86xx_time_init, .calibrate_decr = generic_calibrate_decr, .progress = udbg_progress, #ifdef CONFIG_PCI .pcibios_fixup_bus = fsl_pcibios_fixup_bus, #endif };