478 lines
10 KiB
C
478 lines
10 KiB
C
/*
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* linux/arch/arm/mach-integrator/impd1.c
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*
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* Copyright (C) 2003 Deep Blue Solutions Ltd, All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This file provides the core support for the IM-PD1 module.
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*
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* Module / boot parameters.
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* lmid=n impd1.lmid=n - set the logic module position in stack to 'n'
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/errno.h>
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#include <linux/mm.h>
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#include <linux/amba/bus.h>
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#include <linux/amba/clcd.h>
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#include <linux/amba/mmci.h>
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#include <linux/io.h>
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#include <linux/platform_data/clk-integrator.h>
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#include <linux/slab.h>
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#include <linux/irqchip/arm-vic.h>
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#include <linux/gpio/machine.h>
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#include <asm/sizes.h>
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#include "lm.h"
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#include "impd1.h"
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static int module_id;
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module_param_named(lmid, module_id, int, 0444);
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MODULE_PARM_DESC(lmid, "logic module stack position");
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struct impd1_module {
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void __iomem *base;
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void __iomem *vic_base;
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};
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void impd1_tweak_control(struct device *dev, u32 mask, u32 val)
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{
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struct impd1_module *impd1 = dev_get_drvdata(dev);
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u32 cur;
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val &= mask;
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cur = readl(impd1->base + IMPD1_CTRL) & ~mask;
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writel(cur | val, impd1->base + IMPD1_CTRL);
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}
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EXPORT_SYMBOL(impd1_tweak_control);
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/*
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* MMC support
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*/
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static struct mmci_platform_data mmc_data = {
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.ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
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};
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/*
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* CLCD support
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*/
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#define PANEL PROSPECTOR
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#define LTM10C209 1
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#define PROSPECTOR 2
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#define SVGA 3
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#define VGA 4
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#if PANEL == VGA
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#define PANELTYPE vga
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static struct clcd_panel vga = {
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.mode = {
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.name = "VGA",
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.refresh = 60,
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.xres = 640,
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.yres = 480,
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.pixclock = 39721,
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.left_margin = 40,
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.right_margin = 24,
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.upper_margin = 32,
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.lower_margin = 11,
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.hsync_len = 96,
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.vsync_len = 2,
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.sync = 0,
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.vmode = FB_VMODE_NONINTERLACED,
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},
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.width = -1,
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.height = -1,
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.tim2 = TIM2_BCD | TIM2_IPC,
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.cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
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.caps = CLCD_CAP_5551,
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.connector = IMPD1_CTRL_DISP_VGA,
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.bpp = 16,
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.grayscale = 0,
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};
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#elif PANEL == SVGA
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#define PANELTYPE svga
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static struct clcd_panel svga = {
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.mode = {
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.name = "SVGA",
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.refresh = 0,
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.xres = 800,
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.yres = 600,
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.pixclock = 27778,
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.left_margin = 20,
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.right_margin = 20,
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.upper_margin = 5,
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.lower_margin = 5,
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.hsync_len = 164,
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.vsync_len = 62,
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.sync = 0,
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.vmode = FB_VMODE_NONINTERLACED,
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},
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.width = -1,
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.height = -1,
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.tim2 = TIM2_BCD,
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.cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
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.connector = IMPD1_CTRL_DISP_VGA,
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.caps = CLCD_CAP_5551,
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.bpp = 16,
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.grayscale = 0,
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};
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#elif PANEL == PROSPECTOR
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#define PANELTYPE prospector
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static struct clcd_panel prospector = {
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.mode = {
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.name = "PROSPECTOR",
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.refresh = 0,
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.xres = 640,
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.yres = 480,
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.pixclock = 40000,
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.left_margin = 33,
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.right_margin = 64,
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.upper_margin = 36,
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.lower_margin = 7,
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.hsync_len = 64,
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.vsync_len = 25,
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.sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
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.vmode = FB_VMODE_NONINTERLACED,
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},
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.width = -1,
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.height = -1,
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.tim2 = TIM2_BCD,
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.cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
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.caps = CLCD_CAP_5551,
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.fixedtimings = 1,
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.connector = IMPD1_CTRL_DISP_LCD,
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.bpp = 16,
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.grayscale = 0,
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};
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#elif PANEL == LTM10C209
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#define PANELTYPE ltm10c209
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/*
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* Untested.
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*/
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static struct clcd_panel ltm10c209 = {
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.mode = {
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.name = "LTM10C209",
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.refresh = 0,
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.xres = 640,
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.yres = 480,
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.pixclock = 40000,
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.left_margin = 20,
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.right_margin = 20,
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.upper_margin = 19,
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.lower_margin = 19,
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.hsync_len = 20,
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.vsync_len = 10,
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.sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
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.vmode = FB_VMODE_NONINTERLACED,
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},
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.width = -1,
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.height = -1,
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.tim2 = TIM2_BCD,
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.cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
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.caps = CLCD_CAP_5551,
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.fixedtimings = 1,
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.connector = IMPD1_CTRL_DISP_LCD,
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.bpp = 16,
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.grayscale = 0,
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};
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#endif
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/*
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* Disable all display connectors on the interface module.
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*/
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static void impd1fb_clcd_disable(struct clcd_fb *fb)
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{
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impd1_tweak_control(fb->dev->dev.parent, IMPD1_CTRL_DISP_MASK, 0);
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}
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/*
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* Enable the relevant connector on the interface module.
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*/
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static void impd1fb_clcd_enable(struct clcd_fb *fb)
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{
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impd1_tweak_control(fb->dev->dev.parent, IMPD1_CTRL_DISP_MASK,
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fb->panel->connector | IMPD1_CTRL_DISP_ENABLE);
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}
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static int impd1fb_clcd_setup(struct clcd_fb *fb)
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{
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unsigned long framebase = fb->dev->res.start + 0x01000000;
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unsigned long framesize = SZ_1M;
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int ret = 0;
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fb->panel = &PANELTYPE;
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if (!request_mem_region(framebase, framesize, "clcd framebuffer")) {
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printk(KERN_ERR "IM-PD1: unable to reserve framebuffer\n");
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return -EBUSY;
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}
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fb->fb.screen_base = ioremap(framebase, framesize);
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if (!fb->fb.screen_base) {
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printk(KERN_ERR "IM-PD1: unable to map framebuffer\n");
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ret = -ENOMEM;
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goto free_buffer;
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}
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fb->fb.fix.smem_start = framebase;
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fb->fb.fix.smem_len = framesize;
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return 0;
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free_buffer:
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release_mem_region(framebase, framesize);
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return ret;
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}
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static int impd1fb_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
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{
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unsigned long start, size;
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start = vma->vm_pgoff + (fb->fb.fix.smem_start >> PAGE_SHIFT);
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size = vma->vm_end - vma->vm_start;
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return remap_pfn_range(vma, vma->vm_start, start, size,
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vma->vm_page_prot);
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}
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static void impd1fb_clcd_remove(struct clcd_fb *fb)
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{
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iounmap(fb->fb.screen_base);
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release_mem_region(fb->fb.fix.smem_start, fb->fb.fix.smem_len);
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}
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static struct clcd_board impd1_clcd_data = {
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.name = "IM-PD/1",
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.caps = CLCD_CAP_5551 | CLCD_CAP_888,
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.check = clcdfb_check,
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.decode = clcdfb_decode,
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.disable = impd1fb_clcd_disable,
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.enable = impd1fb_clcd_enable,
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.setup = impd1fb_clcd_setup,
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.mmap = impd1fb_clcd_mmap,
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.remove = impd1fb_clcd_remove,
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};
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struct impd1_device {
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unsigned long offset;
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unsigned int irq[2];
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unsigned int id;
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void *platform_data;
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};
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static struct impd1_device impd1_devs[] = {
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{
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.offset = 0x00100000,
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.irq = { 1 },
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.id = 0x00141011,
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}, {
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.offset = 0x00200000,
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.irq = { 2 },
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.id = 0x00141011,
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}, {
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.offset = 0x00300000,
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.irq = { 3 },
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.id = 0x00041022,
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}, {
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.offset = 0x00400000,
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.irq = { 4 },
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.id = 0x00041061,
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}, {
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.offset = 0x00500000,
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.irq = { 5 },
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.id = 0x00041061,
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}, {
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.offset = 0x00600000,
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.irq = { 6 },
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.id = 0x00041130,
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}, {
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.offset = 0x00700000,
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.irq = { 7, 8 },
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.id = 0x00041181,
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.platform_data = &mmc_data,
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}, {
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.offset = 0x00800000,
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.irq = { 9 },
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.id = 0x00041041,
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}, {
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.offset = 0x01000000,
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.irq = { 11 },
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.id = 0x00041110,
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.platform_data = &impd1_clcd_data,
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}
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};
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/*
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* Valid IRQs: 0 thru 9 and 11, 10 unused.
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*/
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#define IMPD1_VALID_IRQS 0x00000bffU
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/*
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* As this module is bool, it is OK to have this as __ref() - no
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* probe calls will be done after the initial system bootup, as devices
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* are discovered as part of the machine startup.
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*/
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static int __ref impd1_probe(struct lm_device *dev)
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{
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struct impd1_module *impd1;
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int irq_base;
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int i;
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if (dev->id != module_id)
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return -EINVAL;
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if (!devm_request_mem_region(&dev->dev, dev->resource.start,
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SZ_4K, "LM registers"))
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return -EBUSY;
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impd1 = devm_kzalloc(&dev->dev, sizeof(struct impd1_module),
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GFP_KERNEL);
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if (!impd1)
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return -ENOMEM;
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impd1->base = devm_ioremap(&dev->dev, dev->resource.start, SZ_4K);
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if (!impd1->base)
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return -ENOMEM;
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integrator_impd1_clk_init(impd1->base, dev->id);
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if (!devm_request_mem_region(&dev->dev,
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dev->resource.start + 0x03000000,
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SZ_4K, "VIC"))
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return -EBUSY;
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impd1->vic_base = devm_ioremap(&dev->dev,
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dev->resource.start + 0x03000000,
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SZ_4K);
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if (!impd1->vic_base)
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return -ENOMEM;
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irq_base = vic_init_cascaded(impd1->vic_base, dev->irq,
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IMPD1_VALID_IRQS, 0);
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lm_set_drvdata(dev, impd1);
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dev_info(&dev->dev, "IM-PD1 found at 0x%08lx\n",
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(unsigned long)dev->resource.start);
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for (i = 0; i < ARRAY_SIZE(impd1_devs); i++) {
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struct impd1_device *idev = impd1_devs + i;
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struct amba_device *d;
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unsigned long pc_base;
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char devname[32];
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int irq1 = idev->irq[0];
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int irq2 = idev->irq[1];
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/* Translate IRQs to IM-PD1 local numberspace */
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if (irq1)
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irq1 += irq_base;
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if (irq2)
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irq2 += irq_base;
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pc_base = dev->resource.start + idev->offset;
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snprintf(devname, 32, "lm%x:%5.5lx", dev->id, idev->offset >> 12);
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/* Add GPIO descriptor lookup table for the PL061 block */
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if (idev->offset == 0x00400000) {
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struct gpiod_lookup_table *lookup;
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char *chipname;
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char *mmciname;
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lookup = devm_kzalloc(&dev->dev,
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sizeof(*lookup) + 3 * sizeof(struct gpiod_lookup),
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GFP_KERNEL);
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chipname = devm_kstrdup(&dev->dev, devname, GFP_KERNEL);
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mmciname = kasprintf(GFP_KERNEL, "lm%x:00700", dev->id);
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lookup->dev_id = mmciname;
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/*
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* Offsets on GPIO block 1:
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* 3 = MMC WP (write protect)
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* 4 = MMC CD (card detect)
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*
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* Offsets on GPIO block 2:
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* 0 = Up key
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* 1 = Down key
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* 2 = Left key
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* 3 = Right key
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* 4 = Key lower left
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* 5 = Key lower right
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*/
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/* We need the two MMCI GPIO entries */
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lookup->table[0].chip_label = chipname;
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lookup->table[0].chip_hwnum = 3;
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lookup->table[0].con_id = "wp";
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lookup->table[1].chip_label = chipname;
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lookup->table[1].chip_hwnum = 4;
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lookup->table[1].con_id = "cd";
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lookup->table[1].flags = GPIO_ACTIVE_LOW;
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gpiod_add_lookup_table(lookup);
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}
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d = amba_ahb_device_add_res(&dev->dev, devname, pc_base, SZ_4K,
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irq1, irq2,
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idev->platform_data, idev->id,
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&dev->resource);
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if (IS_ERR(d)) {
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dev_err(&dev->dev, "unable to register device: %ld\n", PTR_ERR(d));
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continue;
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}
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}
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return 0;
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}
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static int impd1_remove_one(struct device *dev, void *data)
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{
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device_unregister(dev);
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return 0;
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}
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static void impd1_remove(struct lm_device *dev)
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{
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device_for_each_child(&dev->dev, NULL, impd1_remove_one);
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integrator_impd1_clk_exit(dev->id);
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lm_set_drvdata(dev, NULL);
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}
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static struct lm_driver impd1_driver = {
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.drv = {
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.name = "impd1",
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/*
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* As we're dropping the probe() function, suppress driver
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* binding from sysfs.
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*/
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.suppress_bind_attrs = true,
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},
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.probe = impd1_probe,
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.remove = impd1_remove,
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};
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static int __init impd1_init(void)
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{
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return lm_driver_register(&impd1_driver);
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}
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static void __exit impd1_exit(void)
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{
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lm_driver_unregister(&impd1_driver);
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}
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module_init(impd1_init);
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module_exit(impd1_exit);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Integrator/IM-PD1 logic module core driver");
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MODULE_AUTHOR("Deep Blue Solutions Ltd");
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