arch/arm/mach-lpc32xx/phy3250.c

   1 /*
   2  * Platform support for LPC32xx SoC
   3  *
   4  * Author: Kevin Wells <kevin.wells@nxp.com>
   5  *
   6  * Copyright (C) 2012 Roland Stigge <stigge@antcom.de>
   7  * Copyright (C) 2010 NXP Semiconductors
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  */
  19
  20 #include <linux/init.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/device.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/irq.h>
  25 #include <linux/dma-mapping.h>
  26 #include <linux/device.h>
  27 #include <linux/gpio.h>
  28 #include <linux/amba/bus.h>
  29 #include <linux/amba/clcd.h>
  30 #include <linux/amba/pl08x.h>
  31 #include <linux/amba/mmci.h>
  32 #include <linux/of.h>
  33 #include <linux/of_address.h>
  34 #include <linux/of_irq.h>
  35 #include <linux/of_platform.h>
  36 #include <linux/clk.h>
  37 #include <linux/mtd/lpc32xx_slc.h>
  38 #include <linux/mtd/lpc32xx_mlc.h>
  39 #include <linux/platform_data/gpio-lpc32xx.h>
  40
  41 #include <asm/setup.h>
  42 #include <asm/mach-types.h>
  43 #include <asm/mach/arch.h>
  44
  45 #include <mach/hardware.h>
  46 #include <mach/platform.h>
  47 #include <mach/board.h>
  48 #include "common.h"
  49
  50 /*
  51  * Mapped GPIOLIB GPIOs
  52  */
  53 #define LCD_POWER_GPIO          LPC32XX_GPIO(LPC32XX_GPO_P3_GRP, 0)
  54 #define BKL_POWER_GPIO          LPC32XX_GPIO(LPC32XX_GPO_P3_GRP, 4)
  55 #define MMC_PWR_ENABLE_GPIO     LPC32XX_GPIO(LPC32XX_GPO_P3_GRP, 5)
  56
  57 /*
  58  * AMBA LCD controller
  59  */
  60 static struct clcd_panel conn_lcd_panel = {
  61         .mode           = {
  62                 .name           = "QVGA portrait",
  63                 .refresh        = 60,
  64                 .xres           = 240,
  65                 .yres           = 320,
  66                 .pixclock       = 191828,
  67                 .left_margin    = 22,
  68                 .right_margin   = 11,
  69                 .upper_margin   = 2,
  70                 .lower_margin   = 1,
  71                 .hsync_len      = 5,
  72                 .vsync_len      = 2,
  73                 .sync           = 0,
  74                 .vmode          = FB_VMODE_NONINTERLACED,
  75         },
  76         .width          = -1,
  77         .height         = -1,
  78         .tim2           = (TIM2_IVS | TIM2_IHS),
  79         .cntl           = (CNTL_BGR | CNTL_LCDTFT | CNTL_LCDVCOMP(1) |
  80                                 CNTL_LCDBPP16_565),
  81         .bpp            = 16,
  82 };
  83 #define PANEL_SIZE (3 * SZ_64K)
  84
  85 static int lpc32xx_clcd_setup(struct clcd_fb *fb)
  86 {
  87         dma_addr_t dma;
  88
  89         fb->fb.screen_base = dma_alloc_writecombine(&fb->dev->dev,
  90                 PANEL_SIZE, &dma, GFP_KERNEL);
  91         if (!fb->fb.screen_base) {
  92                 printk(KERN_ERR "CLCD: unable to map framebuffer\n");
  93                 return -ENOMEM;
  94         }
  95
  96         fb->fb.fix.smem_start = dma;
  97         fb->fb.fix.smem_len = PANEL_SIZE;
  98         fb->panel = &conn_lcd_panel;
  99
 100         if (gpio_request(LCD_POWER_GPIO, "LCD power"))
 101                 printk(KERN_ERR "Error requesting gpio %u",
 102                         LCD_POWER_GPIO);
 103         else if (gpio_direction_output(LCD_POWER_GPIO, 1))
 104                 printk(KERN_ERR "Error setting gpio %u to output",
 105                         LCD_POWER_GPIO);
 106
 107         if (gpio_request(BKL_POWER_GPIO, "LCD backlight power"))
 108                 printk(KERN_ERR "Error requesting gpio %u",
 109                         BKL_POWER_GPIO);
 110         else if (gpio_direction_output(BKL_POWER_GPIO, 1))
 111                 printk(KERN_ERR "Error setting gpio %u to output",
 112                         BKL_POWER_GPIO);
 113
 114         return 0;
 115 }
 116
 117 static int lpc32xx_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
 118 {
 119         return dma_mmap_writecombine(&fb->dev->dev, vma,
 120                 fb->fb.screen_base, fb->fb.fix.smem_start,
 121                 fb->fb.fix.smem_len);
 122 }
 123
 124 static void lpc32xx_clcd_remove(struct clcd_fb *fb)
 125 {
 126         dma_free_writecombine(&fb->dev->dev, fb->fb.fix.smem_len,
 127                 fb->fb.screen_base, fb->fb.fix.smem_start);
 128 }
 129
 130 /*
 131  * On some early LCD modules (1307.0), the backlight logic is inverted.
 132  * For those board variants, swap the disable and enable states for
 133  * BKL_POWER_GPIO.
 134 */
 135 static void clcd_disable(struct clcd_fb *fb)
 136 {
 137         gpio_set_value(BKL_POWER_GPIO, 0);
 138         gpio_set_value(LCD_POWER_GPIO, 0);
 139 }
 140
 141 static void clcd_enable(struct clcd_fb *fb)
 142 {
 143         gpio_set_value(BKL_POWER_GPIO, 1);
 144         gpio_set_value(LCD_POWER_GPIO, 1);
 145 }
 146
 147 static struct clcd_board lpc32xx_clcd_data = {
 148         .name           = "Phytec LCD",
 149         .check          = clcdfb_check,
 150         .decode         = clcdfb_decode,
 151         .disable        = clcd_disable,
 152         .enable         = clcd_enable,
 153         .setup          = lpc32xx_clcd_setup,
 154         .mmap           = lpc32xx_clcd_mmap,
 155         .remove         = lpc32xx_clcd_remove,
 156 };
 157
 158 static struct pl08x_channel_data pl08x_slave_channels[] = {
 159         {
 160                 .bus_id = "nand-slc",
 161                 .min_signal = 1, /* SLC NAND Flash */
 162                 .max_signal = 1,
 163                 .periph_buses = PL08X_AHB1,
 164         },
 165         {
 166                 .bus_id = "nand-mlc",
 167                 .min_signal = 12, /* MLC NAND Flash */
 168                 .max_signal = 12,
 169                 .periph_buses = PL08X_AHB1,
 170         },
 171 };
 172
 173 static int pl08x_get_signal(const struct pl08x_channel_data *cd)
 174 {
 175         return cd->min_signal;
 176 }
 177
 178 static void pl08x_put_signal(const struct pl08x_channel_data *cd, int ch)
 179 {
 180 }
 181
 182 static struct pl08x_platform_data pl08x_pd = {
 183         .slave_channels = &pl08x_slave_channels[0],
 184         .num_slave_channels = ARRAY_SIZE(pl08x_slave_channels),
 185         .get_xfer_signal = pl08x_get_signal,
 186         .put_xfer_signal = pl08x_put_signal,
 187         .lli_buses = PL08X_AHB1,
 188         .mem_buses = PL08X_AHB1,
 189 };
 190
 191 static int mmc_handle_ios(struct device *dev, struct mmc_ios *ios)
 192 {
 193         /* Only on and off are supported */
 194         if (ios->power_mode == MMC_POWER_OFF)
 195                 gpio_set_value(MMC_PWR_ENABLE_GPIO, 0);
 196         else
 197                 gpio_set_value(MMC_PWR_ENABLE_GPIO, 1);
 198         return 0;
 199 }
 200
 201 static struct mmci_platform_data lpc32xx_mmci_data = {
 202         .ocr_mask       = MMC_VDD_30_31 | MMC_VDD_31_32 |
 203                           MMC_VDD_32_33 | MMC_VDD_33_34,
 204         .ios_handler    = mmc_handle_ios,
 205         .dma_filter     = NULL,
 206         /* No DMA for now since AMBA PL080 dmaengine driver only does scatter
 207          * gather, and the MMCI driver doesn't do it this way */
 208 };
 209
 210 static struct lpc32xx_slc_platform_data lpc32xx_slc_data = {
 211         .dma_filter = pl08x_filter_id,
 212 };
 213
 214 static struct lpc32xx_mlc_platform_data lpc32xx_mlc_data = {
 215         .dma_filter = pl08x_filter_id,
 216 };
 217
 218 static const struct of_dev_auxdata lpc32xx_auxdata_lookup[] __initconst = {
 219         OF_DEV_AUXDATA("arm,pl022", 0x20084000, "dev:ssp0", NULL),
 220         OF_DEV_AUXDATA("arm,pl022", 0x2008C000, "dev:ssp1", NULL),
 221         OF_DEV_AUXDATA("arm,pl110", 0x31040000, "dev:clcd", &lpc32xx_clcd_data),
 222         OF_DEV_AUXDATA("arm,pl080", 0x31000000, "pl08xdmac", &pl08x_pd),
 223         OF_DEV_AUXDATA("arm,pl18x", 0x20098000, "20098000.sd",
 224                        &lpc32xx_mmci_data),
 225         OF_DEV_AUXDATA("nxp,lpc3220-slc", 0x20020000, "20020000.flash",
 226                        &lpc32xx_slc_data),
 227         OF_DEV_AUXDATA("nxp,lpc3220-mlc", 0x200a8000, "200a8000.flash",
 228                        &lpc32xx_mlc_data),
 229         { }
 230 };
 231
 232 static void __init lpc3250_machine_init(void)
 233 {
 234         u32 tmp;
 235
 236         /* Setup LCD muxing to RGB565 */
 237         tmp = __raw_readl(LPC32XX_CLKPWR_LCDCLK_CTRL) &
 238                 ~(LPC32XX_CLKPWR_LCDCTRL_LCDTYPE_MSK |
 239                 LPC32XX_CLKPWR_LCDCTRL_PSCALE_MSK);
 240         tmp |= LPC32XX_CLKPWR_LCDCTRL_LCDTYPE_TFT16;
 241         __raw_writel(tmp, LPC32XX_CLKPWR_LCDCLK_CTRL);
 242
 243         lpc32xx_serial_init();
 244
 245         /* Test clock needed for UDA1380 initial init */
 246         __raw_writel(LPC32XX_CLKPWR_TESTCLK2_SEL_MOSC |
 247                 LPC32XX_CLKPWR_TESTCLK_TESTCLK2_EN,
 248                 LPC32XX_CLKPWR_TEST_CLK_SEL);
 249
 250         of_platform_populate(NULL, of_default_bus_match_table,
 251                              lpc32xx_auxdata_lookup, NULL);
 252 }
 253
 254 static char const *lpc32xx_dt_compat[] __initdata = {
 255         "nxp,lpc3220",
 256         "nxp,lpc3230",
 257         "nxp,lpc3240",
 258         "nxp,lpc3250",
 259         NULL
 260 };
 261
 262 DT_MACHINE_START(LPC32XX_DT, "LPC32XX SoC (Flattened Device Tree)")
 263         .atag_offset    = 0x100,
 264         .map_io         = lpc32xx_map_io,
 265         .init_irq       = lpc32xx_init_irq,
 266         .init_time      = lpc32xx_timer_init,
 267         .init_machine   = lpc3250_machine_init,
 268         .dt_compat      = lpc32xx_dt_compat,
 269         .restart        = lpc23xx_restart,
 270 MACHINE_END