arch/arm/mach-pxa/em-x270.c

   1 /*
   2  * Support for CompuLab EM-x270 platform
   3  *
   4  * Copyright (C) 2007 CompuLab, Ltd.
   5  * Author: Mike Rapoport <mike@compulab.co.il>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include <linux/irq.h>
  13 #include <linux/platform_device.h>
  14
  15 #include <linux/dm9000.h>
  16 #include <linux/rtc-v3020.h>
  17
  18 #include <linux/mtd/nand.h>
  19 #include <linux/mtd/partitions.h>
  20
  21 #include <asm/mach-types.h>
  22
  23 #include <asm/mach/arch.h>
  24
  25 #include <asm/arch/pxa-regs.h>
  26 #include <asm/arch/pxa2xx-gpio.h>
  27 #include <asm/arch/pxa27x-udc.h>
  28 #include <asm/arch/pxafb.h>
  29 #include <asm/arch/ohci.h>
  30 #include <asm/arch/mmc.h>
  31 #include <asm/arch/bitfield.h>
  32
  33 #include "generic.h"
  34
  35 /* GPIO IRQ usage */
  36 #define EM_X270_MMC_PD          (105)
  37 #define EM_X270_ETHIRQ          IRQ_GPIO(41)
  38 #define EM_X270_MMC_IRQ         IRQ_GPIO(13)
  39
  40 static struct resource em_x270_dm9k_resource[] = {
  41         [0] = {
  42                 .start = PXA_CS2_PHYS,
  43                 .end   = PXA_CS2_PHYS + 3,
  44                 .flags = IORESOURCE_MEM,
  45         },
  46         [1] = {
  47                 .start = PXA_CS2_PHYS + 8,
  48                 .end   = PXA_CS2_PHYS + 8 + 0x3f,
  49                 .flags = IORESOURCE_MEM,
  50         },
  51         [2] = {
  52                 .start = EM_X270_ETHIRQ,
  53                 .end   = EM_X270_ETHIRQ,
  54                 .flags = IORESOURCE_IRQ,
  55         }
  56 };
  57
  58 /* for the moment we limit ourselves to 32bit IO until some
  59  * better IO routines can be written and tested
  60  */
  61 static struct dm9000_plat_data em_x270_dm9k_platdata = {
  62         .flags          = DM9000_PLATF_32BITONLY,
  63 };
  64
  65 /* Ethernet device */
  66 static struct platform_device em_x270_dm9k = {
  67         .name           = "dm9000",
  68         .id             = 0,
  69         .num_resources  = ARRAY_SIZE(em_x270_dm9k_resource),
  70         .resource       = em_x270_dm9k_resource,
  71         .dev            = {
  72                 .platform_data = &em_x270_dm9k_platdata,
  73         }
  74 };
  75
  76 /* audio device */
  77 static struct platform_device em_x270_audio = {
  78         .name           = "pxa2xx-ac97",
  79         .id             = -1,
  80 };
  81
  82 /* WM9712 touchscreen controller. Hopefully the driver will make it to
  83  * the mainstream sometime */
  84 static struct platform_device em_x270_ts = {
  85         .name           = "wm97xx-ts",
  86         .id             = -1,
  87 };
  88
  89 /* RTC */
  90 static struct resource em_x270_v3020_resource[] = {
  91         [0] = {
  92                 .start = PXA_CS4_PHYS,
  93                 .end   = PXA_CS4_PHYS + 3,
  94                 .flags = IORESOURCE_MEM,
  95         },
  96 };
  97
  98 static struct v3020_platform_data em_x270_v3020_platdata = {
  99         .leftshift = 0,
 100 };
 101
 102 static struct platform_device em_x270_rtc = {
 103         .name           = "v3020",
 104         .num_resources  = ARRAY_SIZE(em_x270_v3020_resource),
 105         .resource       = em_x270_v3020_resource,
 106         .id             = -1,
 107         .dev            = {
 108                 .platform_data = &em_x270_v3020_platdata,
 109         }
 110 };
 111
 112 /* NAND flash */
 113 #define GPIO_NAND_CS    (11)
 114 #define GPIO_NAND_RB    (56)
 115
 116 static inline void nand_cs_on(void)
 117 {
 118         GPCR(GPIO_NAND_CS) = GPIO_bit(GPIO_NAND_CS);
 119 }
 120
 121 static void nand_cs_off(void)
 122 {
 123         dsb();
 124
 125         GPSR(GPIO_NAND_CS) = GPIO_bit(GPIO_NAND_CS);
 126 }
 127
 128 /* hardware specific access to control-lines */
 129 static void em_x270_nand_cmd_ctl(struct mtd_info *mtd, int dat,
 130                                  unsigned int ctrl)
 131 {
 132         struct nand_chip *this = mtd->priv;
 133         unsigned long nandaddr = (unsigned long)this->IO_ADDR_W;
 134
 135         dsb();
 136
 137         if (ctrl & NAND_CTRL_CHANGE) {
 138                 if (ctrl & NAND_ALE)
 139                         nandaddr |=  (1 << 3);
 140                 else
 141                         nandaddr &= ~(1 << 3);
 142                 if (ctrl & NAND_CLE)
 143                         nandaddr |=  (1 << 2);
 144                 else
 145                         nandaddr &= ~(1 << 2);
 146                 if (ctrl & NAND_NCE)
 147                         nand_cs_on();
 148                 else
 149                         nand_cs_off();
 150         }
 151
 152         dsb();
 153         this->IO_ADDR_W = (void __iomem *)nandaddr;
 154         if (dat != NAND_CMD_NONE)
 155                 writel(dat, this->IO_ADDR_W);
 156
 157         dsb();
 158 }
 159
 160 /* read device ready pin */
 161 static int em_x270_nand_device_ready(struct mtd_info *mtd)
 162 {
 163         dsb();
 164
 165         return GPLR(GPIO_NAND_RB) & GPIO_bit(GPIO_NAND_RB);
 166 }
 167
 168 static struct mtd_partition em_x270_partition_info[] = {
 169         [0] = {
 170                 .name   = "em_x270-0",
 171                 .offset = 0,
 172                 .size   = SZ_4M,
 173         },
 174         [1] = {
 175                 .name   = "em_x270-1",
 176                 .offset = MTDPART_OFS_APPEND,
 177                 .size   = MTDPART_SIZ_FULL
 178         },
 179 };
 180
 181 static const char *em_x270_part_probes[] = { "cmdlinepart", NULL };
 182
 183 struct platform_nand_data em_x270_nand_platdata = {
 184         .chip = {
 185                 .nr_chips = 1,
 186                 .chip_offset = 0,
 187                 .nr_partitions = ARRAY_SIZE(em_x270_partition_info),
 188                 .partitions = em_x270_partition_info,
 189                 .chip_delay = 20,
 190                 .part_probe_types = em_x270_part_probes,
 191         },
 192         .ctrl = {
 193                 .hwcontrol = 0,
 194                 .dev_ready = em_x270_nand_device_ready,
 195                 .select_chip = 0,
 196                 .cmd_ctrl = em_x270_nand_cmd_ctl,
 197         },
 198 };
 199
 200 static struct resource em_x270_nand_resource[] = {
 201         [0] = {
 202                 .start = PXA_CS1_PHYS,
 203                 .end   = PXA_CS1_PHYS + 12,
 204                 .flags = IORESOURCE_MEM,
 205         },
 206 };
 207
 208 static struct platform_device em_x270_nand = {
 209         .name           = "gen_nand",
 210         .num_resources  = ARRAY_SIZE(em_x270_nand_resource),
 211         .resource       = em_x270_nand_resource,
 212         .id             = -1,
 213         .dev            = {
 214                 .platform_data = &em_x270_nand_platdata,
 215         }
 216 };
 217
 218 /* platform devices */
 219 static struct platform_device *platform_devices[] __initdata = {
 220         &em_x270_dm9k,
 221         &em_x270_audio,
 222         &em_x270_ts,
 223         &em_x270_rtc,
 224         &em_x270_nand,
 225 };
 226
 227
 228 /* PXA27x OHCI controller setup */
 229 static int em_x270_ohci_init(struct device *dev)
 230 {
 231         /* Set the Power Control Polarity Low */
 232         UHCHR = (UHCHR | UHCHR_PCPL) &
 233                 ~(UHCHR_SSEP1 | UHCHR_SSEP2 | UHCHR_SSE);
 234
 235         /* enable port 2 transiever */
 236         UP2OCR = UP2OCR_HXS | UP2OCR_HXOE;
 237
 238         return 0;
 239 }
 240
 241 static struct pxaohci_platform_data em_x270_ohci_platform_data = {
 242         .port_mode      = PMM_PERPORT_MODE,
 243         .init           = em_x270_ohci_init,
 244 };
 245
 246
 247 static int em_x270_mci_init(struct device *dev,
 248                             irq_handler_t em_x270_detect_int,
 249                             void *data)
 250 {
 251         int err;
 252
 253         /* setup GPIO for PXA27x MMC controller */
 254         pxa_gpio_mode(GPIO32_MMCCLK_MD);
 255         pxa_gpio_mode(GPIO112_MMCCMD_MD);
 256         pxa_gpio_mode(GPIO92_MMCDAT0_MD);
 257         pxa_gpio_mode(GPIO109_MMCDAT1_MD);
 258         pxa_gpio_mode(GPIO110_MMCDAT2_MD);
 259         pxa_gpio_mode(GPIO111_MMCDAT3_MD);
 260
 261         /* EM-X270 uses GPIO13 as SD power enable */
 262         pxa_gpio_mode(EM_X270_MMC_PD | GPIO_OUT);
 263
 264         err = request_irq(EM_X270_MMC_IRQ, em_x270_detect_int,
 265                           IRQF_DISABLED | IRQF_TRIGGER_FALLING,
 266                           "MMC card detect", data);
 267         if (err) {
 268                 printk(KERN_ERR "%s: can't request MMC card detect IRQ: %d\n",
 269                        __func__, err);
 270                 return err;
 271         }
 272
 273         return 0;
 274 }
 275
 276 static void em_x270_mci_setpower(struct device *dev, unsigned int vdd)
 277 {
 278         /*
 279            FIXME: current hardware implementation does not allow to
 280            enable/disable MMC power. This will be fixed in next HW releases,
 281            and we'll need to add implmentation here.
 282         */
 283         return;
 284 }
 285
 286 static void em_x270_mci_exit(struct device *dev, void *data)
 287 {
 288         free_irq(EM_X270_MMC_IRQ, data);
 289 }
 290
 291 static struct pxamci_platform_data em_x270_mci_platform_data = {
 292         .ocr_mask       = MMC_VDD_28_29|MMC_VDD_29_30|MMC_VDD_30_31,
 293         .init           = em_x270_mci_init,
 294         .setpower       = em_x270_mci_setpower,
 295         .exit           = em_x270_mci_exit,
 296 };
 297
 298 /* LCD 480x640 */
 299 static struct pxafb_mode_info em_x270_lcd_mode = {
 300         .pixclock       = 50000,
 301         .bpp            = 16,
 302         .xres           = 480,
 303         .yres           = 640,
 304         .hsync_len      = 8,
 305         .vsync_len      = 2,
 306         .left_margin    = 8,
 307         .upper_margin   = 0,
 308         .right_margin   = 24,
 309         .lower_margin   = 4,
 310         .cmap_greyscale = 0,
 311 };
 312
 313 static struct pxafb_mach_info em_x270_lcd = {
 314         .modes          = &em_x270_lcd_mode,
 315         .num_modes      = 1,
 316         .cmap_inverse   = 0,
 317         .cmap_static    = 0,
 318         .lccr0          = LCCR0_PAS,
 319         .lccr3          = LCCR3_PixClkDiv(0x01) | LCCR3_Acb(0xff),
 320 };
 321
 322 static void __init em_x270_init(void)
 323 {
 324         /* setup LCD */
 325         set_pxa_fb_info(&em_x270_lcd);
 326
 327         /* register EM-X270 platform devices */
 328         platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));
 329
 330         /* set MCI and OHCI platform parameters */
 331         pxa_set_mci_info(&em_x270_mci_platform_data);
 332         pxa_set_ohci_info(&em_x270_ohci_platform_data);
 333
 334         /* setup STUART GPIOs */
 335         pxa_gpio_mode(GPIO46_STRXD_MD);
 336         pxa_gpio_mode(GPIO47_STTXD_MD);
 337
 338         /* setup BTUART GPIOs */
 339         pxa_gpio_mode(GPIO42_BTRXD_MD);
 340         pxa_gpio_mode(GPIO43_BTTXD_MD);
 341         pxa_gpio_mode(GPIO44_BTCTS_MD);
 342         pxa_gpio_mode(GPIO45_BTRTS_MD);
 343
 344         /* Setup interrupt for dm9000 */
 345         set_irq_type(EM_X270_ETHIRQ, IRQT_RISING);
 346 }
 347
 348 MACHINE_START(EM_X270, "Compulab EM-x270")
 349         .boot_params    = 0xa0000100,
 350         .phys_io        = 0x40000000,
 351         .io_pg_offst    = (io_p2v(0x40000000) >> 18) & 0xfffc,
 352         .map_io         = pxa_map_io,
 353         .init_irq       = pxa27x_init_irq,
 354         .timer          = &pxa_timer,
 355         .init_machine   = em_x270_init,
 356 MACHINE_END