From 6f90a8bdd17e63fb27b4f6d50e8a2919704ea254 Mon Sep 17 00:00:00 2001 From: York Sun Date: Mon, 28 Apr 2008 02:15:36 -0700 Subject: powerpc: Add DIU platform code for MPC8610HPCD Add platform code to support Freescale DIU. The platform code includes framebuffer memory allocation, pixel format, monitor port, etc. Signed-off-by: York Sun Signed-off-by: Timur Tabi Cc: Paul Mackerras Cc: Benjamin Herrenschmidt Cc: "Antonino A. Daplas" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/powerpc/platforms/86xx/mpc8610_hpcd.c | 190 +++++++++++++++++++++++++++-- arch/powerpc/sysdev/fsl_soc.c | 41 +++++++ arch/powerpc/sysdev/fsl_soc.h | 23 ++++ 3 files changed, 245 insertions(+), 9 deletions(-) diff --git a/arch/powerpc/platforms/86xx/mpc8610_hpcd.c b/arch/powerpc/platforms/86xx/mpc8610_hpcd.c index 18b8ebe930d..5e1e8cf14e7 100644 --- a/arch/powerpc/platforms/86xx/mpc8610_hpcd.c +++ b/arch/powerpc/platforms/86xx/mpc8610_hpcd.c @@ -3,11 +3,12 @@ * * Initial author: Xianghua Xiao * Recode: Jason Jin + * York Sun * * Rewrite the interrupt routing. remove the 8259PIC support, * All the integrated device in ULI use sideband interrupt. * - * Copyright 2007 Freescale Semiconductor Inc. + * 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 @@ -38,6 +39,8 @@ #include #include +static unsigned char *pixis_bdcfg0, *pixis_arch; + static struct of_device_id __initdata mpc8610_ids[] = { { .compatible = "fsl,mpc8610-immr", }, {} @@ -52,8 +55,7 @@ static int __init mpc8610_declare_of_platform_devices(void) } machine_device_initcall(mpc86xx_hpcd, mpc8610_declare_of_platform_devices); -static void __init -mpc86xx_hpcd_init_irq(void) +static void __init mpc86xx_hpcd_init_irq(void) { struct mpic *mpic1; struct device_node *np; @@ -161,12 +163,159 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5229, quirk_uli5229); DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, 0x5288, final_uli5288); #endif /* CONFIG_PCI */ -static void __init -mpc86xx_hpcd_setup_arch(void) +#if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE) + +static u32 get_busfreq(void) { -#ifdef CONFIG_PCI - struct device_node *np; + struct device_node *node; + + u32 fs_busfreq = 0; + node = of_find_node_by_type(NULL, "cpu"); + if (node) { + unsigned int size; + const unsigned int *prop = + of_get_property(node, "bus-frequency", &size); + if (prop) + fs_busfreq = *prop; + of_node_put(node); + }; + return fs_busfreq; +} + +unsigned int mpc8610hpcd_get_pixel_format(unsigned int bits_per_pixel, + int monitor_port) +{ + static const unsigned long pixelformat[][3] = { + {0x88882317, 0x88083218, 0x65052119}, + {0x88883316, 0x88082219, 0x65053118}, + }; + unsigned int pix_fmt, arch_monitor; + + arch_monitor = ((*pixis_arch == 0x01) && (monitor_port == 0))? 0 : 1; + /* DVI port for board version 0x01 */ + + if (bits_per_pixel == 32) + pix_fmt = pixelformat[arch_monitor][0]; + else if (bits_per_pixel == 24) + pix_fmt = pixelformat[arch_monitor][1]; + else if (bits_per_pixel == 16) + pix_fmt = pixelformat[arch_monitor][2]; + else + pix_fmt = pixelformat[1][0]; + + return pix_fmt; +} + +void mpc8610hpcd_set_gamma_table(int monitor_port, char *gamma_table_base) +{ + int i; + if (monitor_port == 2) { /* dual link LVDS */ + for (i = 0; i < 256*3; i++) + gamma_table_base[i] = (gamma_table_base[i] << 2) | + ((gamma_table_base[i] >> 6) & 0x03); + } +} + +void mpc8610hpcd_set_monitor_port(int monitor_port) +{ + static const u8 bdcfg[] = {0xBD, 0xB5, 0xA5}; + if (monitor_port < 3) + *pixis_bdcfg0 = bdcfg[monitor_port]; +} + +void mpc8610hpcd_set_pixel_clock(unsigned int pixclock) +{ + u32 __iomem *clkdvdr; + u32 temp; + /* variables for pixel clock calcs */ + ulong bestval, bestfreq, speed_ccb, minpixclock, maxpixclock; + ulong pixval; + long err; + int i; + + clkdvdr = ioremap(get_immrbase() + 0xe0800, sizeof(u32)); + if (!clkdvdr) { + printk(KERN_ERR "Err: can't map clock divider register!\n"); + return; + } + + /* Pixel Clock configuration */ + pr_debug("DIU: Bus Frequency = %d\n", get_busfreq()); + speed_ccb = get_busfreq(); + + /* Calculate the pixel clock with the smallest error */ + /* calculate the following in steps to avoid overflow */ + pr_debug("DIU pixclock in ps - %d\n", pixclock); + temp = 1000000000/pixclock; + temp *= 1000; + pixclock = temp; + pr_debug("DIU pixclock freq - %u\n", pixclock); + + temp = pixclock * 5 / 100; + pr_debug("deviation = %d\n", temp); + minpixclock = pixclock - temp; + maxpixclock = pixclock + temp; + pr_debug("DIU minpixclock - %lu\n", minpixclock); + pr_debug("DIU maxpixclock - %lu\n", maxpixclock); + pixval = speed_ccb/pixclock; + pr_debug("DIU pixval = %lu\n", pixval); + + err = 100000000; + bestval = pixval; + pr_debug("DIU bestval = %lu\n", bestval); + + bestfreq = 0; + for (i = -1; i <= 1; i++) { + temp = speed_ccb / ((pixval+i) + 1); + pr_debug("DIU test pixval i= %d, pixval=%lu, temp freq. = %u\n", + i, pixval, temp); + if ((temp < minpixclock) || (temp > maxpixclock)) + pr_debug("DIU exceeds monitor range (%lu to %lu)\n", + minpixclock, maxpixclock); + else if (abs(temp - pixclock) < err) { + pr_debug("Entered the else if block %d\n", i); + err = abs(temp - pixclock); + bestval = pixval+i; + bestfreq = temp; + } + } + + pr_debug("DIU chose = %lx\n", bestval); + pr_debug("DIU error = %ld\n NomPixClk ", err); + pr_debug("DIU: Best Freq = %lx\n", bestfreq); + /* Modify PXCLK in GUTS CLKDVDR */ + pr_debug("DIU: Current value of CLKDVDR = 0x%08x\n", (*clkdvdr)); + temp = (*clkdvdr) & 0x2000FFFF; + *clkdvdr = temp; /* turn off clock */ + *clkdvdr = temp | 0x80000000 | (((bestval) & 0x1F) << 16); + pr_debug("DIU: Modified value of CLKDVDR = 0x%08x\n", (*clkdvdr)); + iounmap(clkdvdr); +} + +ssize_t mpc8610hpcd_show_monitor_port(int monitor_port, char *buf) +{ + return snprintf(buf, PAGE_SIZE, + "%c0 - DVI\n" + "%c1 - Single link LVDS\n" + "%c2 - Dual link LVDS\n", + monitor_port == 0 ? '*' : ' ', + monitor_port == 1 ? '*' : ' ', + monitor_port == 2 ? '*' : ' '); +} + +int mpc8610hpcd_set_sysfs_monitor_port(int val) +{ + return val < 3 ? val : 0; +} + #endif + +static void __init mpc86xx_hpcd_setup_arch(void) +{ + struct resource r; + struct device_node *np; + unsigned char *pixis; + if (ppc_md.progress) ppc_md.progress("mpc86xx_hpcd_setup_arch()", 0); @@ -183,6 +332,30 @@ mpc86xx_hpcd_setup_arch(void) } } #endif +#if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE) + preallocate_diu_videomemory(); + 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.show_monitor_port = mpc8610hpcd_show_monitor_port; + diu_ops.set_sysfs_monitor_port = mpc8610hpcd_set_sysfs_monitor_port; +#endif + + np = of_find_compatible_node(NULL, NULL, "fsl,fpga-pixis"); + if (np) { + of_address_to_resource(np, 0, &r); + of_node_put(np); + 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"); } @@ -200,8 +373,7 @@ static int __init mpc86xx_hpcd_probe(void) return 0; } -static long __init -mpc86xx_time_init(void) +static long __init mpc86xx_time_init(void) { unsigned int temp; diff --git a/arch/powerpc/sysdev/fsl_soc.c b/arch/powerpc/sysdev/fsl_soc.c index 5c1b246aacc..7b45670c7af 100644 --- a/arch/powerpc/sysdev/fsl_soc.c +++ b/arch/powerpc/sysdev/fsl_soc.c @@ -892,3 +892,44 @@ void fsl_rstcr_restart(char *cmd) while (1) ; } #endif + +#if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE) +struct platform_diu_data_ops diu_ops = { + .diu_size = 1280 * 1024 * 4, /* default one 1280x1024 buffer */ +}; +EXPORT_SYMBOL(diu_ops); + +int __init preallocate_diu_videomemory(void) +{ + pr_debug("diu_size=%lu\n", diu_ops.diu_size); + + diu_ops.diu_mem = __alloc_bootmem(diu_ops.diu_size, 8, 0); + if (!diu_ops.diu_mem) { + printk(KERN_ERR "fsl-diu: cannot allocate %lu bytes\n", + diu_ops.diu_size); + return -ENOMEM; + } + + pr_debug("diu_mem=%p\n", diu_ops.diu_mem); + + rh_init(&diu_ops.diu_rh_info, 4096, ARRAY_SIZE(diu_ops.diu_rh_block), + diu_ops.diu_rh_block); + return rh_attach_region(&diu_ops.diu_rh_info, + (unsigned long) diu_ops.diu_mem, + diu_ops.diu_size); +} + +static int __init early_parse_diufb(char *p) +{ + if (!p) + return 1; + + diu_ops.diu_size = _ALIGN_UP(memparse(p, &p), 8); + + pr_debug("diu_size=%lu\n", diu_ops.diu_size); + + return 0; +} +early_param("diufb", early_parse_diufb); + +#endif diff --git a/arch/powerpc/sysdev/fsl_soc.h b/arch/powerpc/sysdev/fsl_soc.h index 74c4a9657b3..52c831fa188 100644 --- a/arch/powerpc/sysdev/fsl_soc.h +++ b/arch/powerpc/sysdev/fsl_soc.h @@ -17,5 +17,28 @@ extern int fsl_spi_init(struct spi_board_info *board_infos, void (*deactivate_cs)(u8 cs, u8 polarity)); extern void fsl_rstcr_restart(char *cmd); + +#if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE) +#include +#include +struct platform_diu_data_ops { + rh_block_t diu_rh_block[16]; + rh_info_t diu_rh_info; + unsigned long diu_size; + void *diu_mem; + + unsigned int (*get_pixel_format) (unsigned int bits_per_pixel, + int monitor_port); + void (*set_gamma_table) (int monitor_port, char *gamma_table_base); + void (*set_monitor_port) (int monitor_port); + void (*set_pixel_clock) (unsigned int pixclock); + ssize_t (*show_monitor_port) (int monitor_port, char *buf); + int (*set_sysfs_monitor_port) (int val); +}; + +extern struct platform_diu_data_ops diu_ops; +int __init preallocate_diu_videomemory(void); +#endif + #endif #endif -- cgit v1.2.3