arch/arm/mach-mxs/mach-mxs.c

   1 /*
   2  * Copyright 2012 Freescale Semiconductor, Inc.
   3  * Copyright 2012 Linaro Ltd.
   4  *
   5  * The code contained herein is licensed under the GNU General Public
   6  * License. You may obtain a copy of the GNU General Public License
   7  * Version 2 or later at the following locations:
   8  *
   9  * http://www.opensource.org/licenses/gpl-license.html
  10  * http://www.gnu.org/copyleft/gpl.html
  11  */
  12
  13 #include <linux/clk.h>
  14 #include <linux/clkdev.h>
  15 #include <linux/can/platform/flexcan.h>
  16 #include <linux/delay.h>
  17 #include <linux/err.h>
  18 #include <linux/gpio.h>
  19 #include <linux/init.h>
  20 #include <linux/micrel_phy.h>
  21 #include <linux/mxsfb.h>
  22 #include <linux/of_platform.h>
  23 #include <linux/phy.h>
  24 #include <linux/pinctrl/consumer.h>
  25 #include <asm/mach/arch.h>
  26 #include <asm/mach/time.h>
  27 #include <mach/common.h>
  28 #include <mach/digctl.h>
  29 #include <mach/mxs.h>
  30
  31 static struct fb_videomode mx23evk_video_modes[] = {
  32         {
  33                 .name           = "Samsung-LMS430HF02",
  34                 .refresh        = 60,
  35                 .xres           = 480,
  36                 .yres           = 272,
  37                 .pixclock       = 108096, /* picosecond (9.2 MHz) */
  38                 .left_margin    = 15,
  39                 .right_margin   = 8,
  40                 .upper_margin   = 12,
  41                 .lower_margin   = 4,
  42                 .hsync_len      = 1,
  43                 .vsync_len      = 1,
  44                 .sync           = FB_SYNC_DATA_ENABLE_HIGH_ACT |
  45                                   FB_SYNC_DOTCLK_FAILING_ACT,
  46         },
  47 };
  48
  49 static struct fb_videomode mx28evk_video_modes[] = {
  50         {
  51                 .name           = "Seiko-43WVF1G",
  52                 .refresh        = 60,
  53                 .xres           = 800,
  54                 .yres           = 480,
  55                 .pixclock       = 29851, /* picosecond (33.5 MHz) */
  56                 .left_margin    = 89,
  57                 .right_margin   = 164,
  58                 .upper_margin   = 23,
  59                 .lower_margin   = 10,
  60                 .hsync_len      = 10,
  61                 .vsync_len      = 10,
  62                 .sync           = FB_SYNC_DATA_ENABLE_HIGH_ACT |
  63                                   FB_SYNC_DOTCLK_FAILING_ACT,
  64         },
  65 };
  66
  67 static struct fb_videomode m28evk_video_modes[] = {
  68         {
  69                 .name           = "Ampire AM-800480R2TMQW-T01H",
  70                 .refresh        = 60,
  71                 .xres           = 800,
  72                 .yres           = 480,
  73                 .pixclock       = 30066, /* picosecond (33.26 MHz) */
  74                 .left_margin    = 0,
  75                 .right_margin   = 256,
  76                 .upper_margin   = 0,
  77                 .lower_margin   = 45,
  78                 .hsync_len      = 1,
  79                 .vsync_len      = 1,
  80                 .sync           = FB_SYNC_DATA_ENABLE_HIGH_ACT,
  81         },
  82 };
  83
  84 static struct fb_videomode apx4devkit_video_modes[] = {
  85         {
  86                 .name           = "HannStar PJ70112A",
  87                 .refresh        = 60,
  88                 .xres           = 800,
  89                 .yres           = 480,
  90                 .pixclock       = 33333, /* picosecond (30.00 MHz) */
  91                 .left_margin    = 88,
  92                 .right_margin   = 40,
  93                 .upper_margin   = 32,
  94                 .lower_margin   = 13,
  95                 .hsync_len      = 48,
  96                 .vsync_len      = 3,
  97                 .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT |
  98                                   FB_SYNC_DATA_ENABLE_HIGH_ACT |
  99                                   FB_SYNC_DOTCLK_FAILING_ACT,
 100         },
 101 };
 102
 103 static struct mxsfb_platform_data mxsfb_pdata __initdata;
 104
 105 /*
 106  * MX28EVK_FLEXCAN_SWITCH is shared between both flexcan controllers
 107  */
 108 #define MX28EVK_FLEXCAN_SWITCH  MXS_GPIO_NR(2, 13)
 109
 110 static int flexcan0_en, flexcan1_en;
 111
 112 static void mx28evk_flexcan_switch(void)
 113 {
 114         if (flexcan0_en || flexcan1_en)
 115                 gpio_set_value(MX28EVK_FLEXCAN_SWITCH, 1);
 116         else
 117                 gpio_set_value(MX28EVK_FLEXCAN_SWITCH, 0);
 118 }
 119
 120 static void mx28evk_flexcan0_switch(int enable)
 121 {
 122         flexcan0_en = enable;
 123         mx28evk_flexcan_switch();
 124 }
 125
 126 static void mx28evk_flexcan1_switch(int enable)
 127 {
 128         flexcan1_en = enable;
 129         mx28evk_flexcan_switch();
 130 }
 131
 132 static struct flexcan_platform_data flexcan_pdata[2];
 133
 134 static struct of_dev_auxdata mxs_auxdata_lookup[] __initdata = {
 135         OF_DEV_AUXDATA("fsl,imx23-lcdif", 0x80030000, NULL, &mxsfb_pdata),
 136         OF_DEV_AUXDATA("fsl,imx28-lcdif", 0x80030000, NULL, &mxsfb_pdata),
 137         OF_DEV_AUXDATA("fsl,imx28-flexcan", 0x80032000, NULL, &flexcan_pdata[0]),
 138         OF_DEV_AUXDATA("fsl,imx28-flexcan", 0x80034000, NULL, &flexcan_pdata[1]),
 139         { /* sentinel */ }
 140 };
 141
 142 static void __init imx23_timer_init(void)
 143 {
 144         mx23_clocks_init();
 145 }
 146
 147 static struct sys_timer imx23_timer = {
 148         .init = imx23_timer_init,
 149 };
 150
 151 static void __init imx28_timer_init(void)
 152 {
 153         mx28_clocks_init();
 154 }
 155
 156 static struct sys_timer imx28_timer = {
 157         .init = imx28_timer_init,
 158 };
 159
 160 enum mac_oui {
 161         OUI_FSL,
 162         OUI_DENX,
 163 };
 164
 165 static void __init update_fec_mac_prop(enum mac_oui oui)
 166 {
 167         struct device_node *np, *from = NULL;
 168         struct property *newmac;
 169         const u32 *ocotp = mxs_get_ocotp();
 170         u8 *macaddr;
 171         u32 val;
 172         int i;
 173
 174         for (i = 0; i < 2; i++) {
 175                 np = of_find_compatible_node(from, NULL, "fsl,imx28-fec");
 176                 if (!np)
 177                         return;
 178                 from = np;
 179
 180                 newmac = kzalloc(sizeof(*newmac) + 6, GFP_KERNEL);
 181                 if (!newmac)
 182                         return;
 183                 newmac->value = newmac + 1;
 184                 newmac->length = 6;
 185
 186                 newmac->name = kstrdup("local-mac-address", GFP_KERNEL);
 187                 if (!newmac->name) {
 188                         kfree(newmac);
 189                         return;
 190                 }
 191
 192                 /*
 193                  * OCOTP only stores the last 4 octets for each mac address,
 194                  * so hard-code OUI here.
 195                  */
 196                 macaddr = newmac->value;
 197                 switch (oui) {
 198                 case OUI_FSL:
 199                         macaddr[0] = 0x00;
 200                         macaddr[1] = 0x04;
 201                         macaddr[2] = 0x9f;
 202                         break;
 203                 case OUI_DENX:
 204                         macaddr[0] = 0xc0;
 205                         macaddr[1] = 0xe5;
 206                         macaddr[2] = 0x4e;
 207                         break;
 208                 }
 209                 val = ocotp[i];
 210                 macaddr[3] = (val >> 16) & 0xff;
 211                 macaddr[4] = (val >> 8) & 0xff;
 212                 macaddr[5] = (val >> 0) & 0xff;
 213
 214                 of_update_property(np, newmac);
 215         }
 216 }
 217
 218 static void __init imx23_evk_init(void)
 219 {
 220         mxsfb_pdata.mode_list = mx23evk_video_modes;
 221         mxsfb_pdata.mode_count = ARRAY_SIZE(mx23evk_video_modes);
 222         mxsfb_pdata.default_bpp = 32;
 223         mxsfb_pdata.ld_intf_width = STMLCDIF_24BIT;
 224 }
 225
 226 static inline void enable_clk_enet_out(void)
 227 {
 228         struct clk *clk = clk_get_sys("enet_out", NULL);
 229
 230         if (!IS_ERR(clk))
 231                 clk_prepare_enable(clk);
 232 }
 233
 234 static void __init imx28_evk_init(void)
 235 {
 236         enable_clk_enet_out();
 237         update_fec_mac_prop(OUI_FSL);
 238
 239         mxsfb_pdata.mode_list = mx28evk_video_modes;
 240         mxsfb_pdata.mode_count = ARRAY_SIZE(mx28evk_video_modes);
 241         mxsfb_pdata.default_bpp = 32;
 242         mxsfb_pdata.ld_intf_width = STMLCDIF_24BIT;
 243
 244         mxs_saif_clkmux_select(MXS_DIGCTL_SAIF_CLKMUX_EXTMSTR0);
 245 }
 246
 247 static void __init imx28_evk_post_init(void)
 248 {
 249         if (!gpio_request_one(MX28EVK_FLEXCAN_SWITCH, GPIOF_DIR_OUT,
 250                               "flexcan-switch")) {
 251                 flexcan_pdata[0].transceiver_switch = mx28evk_flexcan0_switch;
 252                 flexcan_pdata[1].transceiver_switch = mx28evk_flexcan1_switch;
 253         }
 254 }
 255
 256 static void __init m28evk_init(void)
 257 {
 258         mxsfb_pdata.mode_list = m28evk_video_modes;
 259         mxsfb_pdata.mode_count = ARRAY_SIZE(m28evk_video_modes);
 260         mxsfb_pdata.default_bpp = 16;
 261         mxsfb_pdata.ld_intf_width = STMLCDIF_18BIT;
 262 }
 263
 264 static int apx4devkit_phy_fixup(struct phy_device *phy)
 265 {
 266         phy->dev_flags |= MICREL_PHY_50MHZ_CLK;
 267         return 0;
 268 }
 269
 270 static void __init apx4devkit_init(void)
 271 {
 272         enable_clk_enet_out();
 273
 274         if (IS_BUILTIN(CONFIG_PHYLIB))
 275                 phy_register_fixup_for_uid(PHY_ID_KSZ8051, MICREL_PHY_ID_MASK,
 276                                            apx4devkit_phy_fixup);
 277
 278         mxsfb_pdata.mode_list = apx4devkit_video_modes;
 279         mxsfb_pdata.mode_count = ARRAY_SIZE(apx4devkit_video_modes);
 280         mxsfb_pdata.default_bpp = 32;
 281         mxsfb_pdata.ld_intf_width = STMLCDIF_24BIT;
 282 }
 283
 284 #define ENET0_MDC__GPIO_4_0     MXS_GPIO_NR(4, 0)
 285 #define ENET0_MDIO__GPIO_4_1    MXS_GPIO_NR(4, 1)
 286 #define ENET0_RX_EN__GPIO_4_2   MXS_GPIO_NR(4, 2)
 287 #define ENET0_RXD0__GPIO_4_3    MXS_GPIO_NR(4, 3)
 288 #define ENET0_RXD1__GPIO_4_4    MXS_GPIO_NR(4, 4)
 289 #define ENET0_TX_EN__GPIO_4_6   MXS_GPIO_NR(4, 6)
 290 #define ENET0_TXD0__GPIO_4_7    MXS_GPIO_NR(4, 7)
 291 #define ENET0_TXD1__GPIO_4_8    MXS_GPIO_NR(4, 8)
 292 #define ENET_CLK__GPIO_4_16     MXS_GPIO_NR(4, 16)
 293
 294 #define TX28_FEC_PHY_POWER      MXS_GPIO_NR(3, 29)
 295 #define TX28_FEC_PHY_RESET      MXS_GPIO_NR(4, 13)
 296 #define TX28_FEC_nINT           MXS_GPIO_NR(4, 5)
 297
 298 static const struct gpio tx28_gpios[] __initconst = {
 299         { ENET0_MDC__GPIO_4_0, GPIOF_OUT_INIT_LOW, "GPIO_4_0" },
 300         { ENET0_MDIO__GPIO_4_1, GPIOF_OUT_INIT_LOW, "GPIO_4_1" },
 301         { ENET0_RX_EN__GPIO_4_2, GPIOF_OUT_INIT_LOW, "GPIO_4_2" },
 302         { ENET0_RXD0__GPIO_4_3, GPIOF_OUT_INIT_LOW, "GPIO_4_3" },
 303         { ENET0_RXD1__GPIO_4_4, GPIOF_OUT_INIT_LOW, "GPIO_4_4" },
 304         { ENET0_TX_EN__GPIO_4_6, GPIOF_OUT_INIT_LOW, "GPIO_4_6" },
 305         { ENET0_TXD0__GPIO_4_7, GPIOF_OUT_INIT_LOW, "GPIO_4_7" },
 306         { ENET0_TXD1__GPIO_4_8, GPIOF_OUT_INIT_LOW, "GPIO_4_8" },
 307         { ENET_CLK__GPIO_4_16, GPIOF_OUT_INIT_LOW, "GPIO_4_16" },
 308         { TX28_FEC_PHY_POWER, GPIOF_OUT_INIT_LOW, "fec-phy-power" },
 309         { TX28_FEC_PHY_RESET, GPIOF_OUT_INIT_LOW, "fec-phy-reset" },
 310         { TX28_FEC_nINT, GPIOF_DIR_IN, "fec-int" },
 311 };
 312
 313 static void __init tx28_post_init(void)
 314 {
 315         struct device_node *np;
 316         struct platform_device *pdev;
 317         struct pinctrl *pctl;
 318         int ret;
 319
 320         enable_clk_enet_out();
 321
 322         np = of_find_compatible_node(NULL, NULL, "fsl,imx28-fec");
 323         pdev = of_find_device_by_node(np);
 324         if (!pdev) {
 325                 pr_err("%s: failed to find fec device\n", __func__);
 326                 return;
 327         }
 328
 329         pctl = pinctrl_get_select(&pdev->dev, "gpio_mode");
 330         if (IS_ERR(pctl)) {
 331                 pr_err("%s: failed to get pinctrl state\n", __func__);
 332                 return;
 333         }
 334
 335         ret = gpio_request_array(tx28_gpios, ARRAY_SIZE(tx28_gpios));
 336         if (ret) {
 337                 pr_err("%s: failed to request gpios: %d\n", __func__, ret);
 338                 return;
 339         }
 340
 341         /* Power up fec phy */
 342         gpio_set_value(TX28_FEC_PHY_POWER, 1);
 343         msleep(26); /* 25ms according to data sheet */
 344
 345         /* Mode strap pins */
 346         gpio_set_value(ENET0_RX_EN__GPIO_4_2, 1);
 347         gpio_set_value(ENET0_RXD0__GPIO_4_3, 1);
 348         gpio_set_value(ENET0_RXD1__GPIO_4_4, 1);
 349
 350         udelay(100); /* minimum assertion time for nRST */
 351
 352         /* Deasserting FEC PHY RESET */
 353         gpio_set_value(TX28_FEC_PHY_RESET, 1);
 354
 355         pinctrl_put(pctl);
 356 }
 357
 358 static void __init mxs_machine_init(void)
 359 {
 360         if (of_machine_is_compatible("fsl,imx28-evk"))
 361                 imx28_evk_init();
 362         else if (of_machine_is_compatible("fsl,imx23-evk"))
 363                 imx23_evk_init();
 364         else if (of_machine_is_compatible("denx,m28evk"))
 365                 m28evk_init();
 366         else if (of_machine_is_compatible("bluegiga,apx4devkit"))
 367                 apx4devkit_init();
 368
 369         of_platform_populate(NULL, of_default_bus_match_table,
 370                              mxs_auxdata_lookup, NULL);
 371
 372         if (of_machine_is_compatible("karo,tx28"))
 373                 tx28_post_init();
 374
 375         if (of_machine_is_compatible("fsl,imx28-evk"))
 376                 imx28_evk_post_init();
 377 }
 378
 379 static const char *imx23_dt_compat[] __initdata = {
 380         "fsl,imx23",
 381         NULL,
 382 };
 383
 384 static const char *imx28_dt_compat[] __initdata = {
 385         "fsl,imx28",
 386         NULL,
 387 };
 388
 389 DT_MACHINE_START(IMX23, "Freescale i.MX23 (Device Tree)")
 390         .map_io         = mx23_map_io,
 391         .init_irq       = icoll_init_irq,
 392         .handle_irq     = icoll_handle_irq,
 393         .timer          = &imx23_timer,
 394         .init_machine   = mxs_machine_init,
 395         .dt_compat      = imx23_dt_compat,
 396         .restart        = mxs_restart,
 397 MACHINE_END
 398
 399 DT_MACHINE_START(IMX28, "Freescale i.MX28 (Device Tree)")
 400         .map_io         = mx28_map_io,
 401         .init_irq       = icoll_init_irq,
 402         .handle_irq     = icoll_handle_irq,
 403         .timer          = &imx28_timer,
 404         .init_machine   = mxs_machine_init,
 405         .dt_compat      = imx28_dt_compat,
 406         .restart        = mxs_restart,
 407 MACHINE_END