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 }; 206 207 static struct lpc32xx_slc_platform_data lpc32xx_slc_data = { 208 .dma_filter = pl08x_filter_id, 209 }; 210 211 static struct lpc32xx_mlc_platform_data lpc32xx_mlc_data = { 212 .dma_filter = pl08x_filter_id, 213 }; 214 215 static const struct of_dev_auxdata lpc32xx_auxdata_lookup[] __initconst = { 216 OF_DEV_AUXDATA("arm,pl022", 0x20084000, "dev:ssp0", NULL), 217 OF_DEV_AUXDATA("arm,pl022", 0x2008C000, "dev:ssp1", NULL), 218 OF_DEV_AUXDATA("arm,pl110", 0x31040000, "dev:clcd", &lpc32xx_clcd_data), 219 OF_DEV_AUXDATA("arm,pl080", 0x31000000, "pl08xdmac", &pl08x_pd), 220 OF_DEV_AUXDATA("arm,pl18x", 0x20098000, "20098000.sd", 221 &lpc32xx_mmci_data), 222 OF_DEV_AUXDATA("nxp,lpc3220-slc", 0x20020000, "20020000.flash", 223 &lpc32xx_slc_data), 224 OF_DEV_AUXDATA("nxp,lpc3220-mlc", 0x200a8000, "200a8000.flash", 225 &lpc32xx_mlc_data), 226 { } 227 }; 228 229 static void __init lpc3250_machine_init(void) 230 { 231 u32 tmp; 232 233 /* Setup LCD muxing to RGB565 */ 234 tmp = __raw_readl(LPC32XX_CLKPWR_LCDCLK_CTRL) & 235 ~(LPC32XX_CLKPWR_LCDCTRL_LCDTYPE_MSK | 236 LPC32XX_CLKPWR_LCDCTRL_PSCALE_MSK); 237 tmp |= LPC32XX_CLKPWR_LCDCTRL_LCDTYPE_TFT16; 238 __raw_writel(tmp, LPC32XX_CLKPWR_LCDCLK_CTRL); 239 240 lpc32xx_serial_init(); 241 242 /* Test clock needed for UDA1380 initial init */ 243 __raw_writel(LPC32XX_CLKPWR_TESTCLK2_SEL_MOSC | 244 LPC32XX_CLKPWR_TESTCLK_TESTCLK2_EN, 245 LPC32XX_CLKPWR_TEST_CLK_SEL); 246 247 of_platform_populate(NULL, of_default_bus_match_table, 248 lpc32xx_auxdata_lookup, NULL); 249 } 250 251 static char const *lpc32xx_dt_compat[] __initdata = { 252 "nxp,lpc3220", 253 "nxp,lpc3230", 254 "nxp,lpc3240", 255 "nxp,lpc3250", 256 NULL 257 }; 258 259 DT_MACHINE_START(LPC32XX_DT, "LPC32XX SoC (Flattened Device Tree)") 260 .atag_offset = 0x100, 261 .map_io = lpc32xx_map_io, 262 .init_irq = lpc32xx_init_irq, 263 .init_time = lpc32xx_timer_init, 264 .init_machine = lpc3250_machine_init, 265 .dt_compat = lpc32xx_dt_compat, 266 .restart = lpc23xx_restart, 267 MACHINE_END 268