arch/arm/mach-omap2/pdata-quirks.c

   1 /*
   2  * Legacy platform_data quirks
   3  *
   4  * Copyright (C) 2013 Texas Instruments
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10 #include <linux/clk.h>
  11 #include <linux/davinci_emac.h>
  12 #include <linux/gpio.h>
  13 #include <linux/init.h>
  14 #include <linux/kernel.h>
  15 #include <linux/of_platform.h>
  16 #include <linux/wl12xx.h>
  17
  18 #include <linux/platform_data/pinctrl-single.h>
  19
  20 #include "am35xx.h"
  21 #include "common.h"
  22 #include "common-board-devices.h"
  23 #include "dss-common.h"
  24 #include "control.h"
  25 #include "omap-secure.h"
  26 #include "soc.h"
  27
  28 struct pdata_init {
  29         const char *compatible;
  30         void (*fn)(void);
  31 };
  32
  33 struct of_dev_auxdata omap_auxdata_lookup[];
  34 static struct twl4030_gpio_platform_data twl_gpio_auxdata;
  35
  36 /*
  37  * Create alias for USB host PHY clock.
  38  * Remove this when clock phandle can be provided via DT
  39  */
  40 static void __init __used legacy_init_ehci_clk(char *clkname)
  41 {
  42         int ret;
  43
  44         ret = clk_add_alias("main_clk", NULL, clkname, NULL);
  45         if (ret)
  46                 pr_err("%s:Failed to add main_clk alias to %s :%d\n",
  47                        __func__, clkname, ret);
  48 }
  49
  50 #if IS_ENABLED(CONFIG_WL12XX)
  51
  52 static struct wl12xx_platform_data wl12xx __initdata;
  53
  54 static void __init __used legacy_init_wl12xx(unsigned ref_clock,
  55                                              unsigned tcxo_clock,
  56                                              int gpio)
  57 {
  58         int res;
  59
  60         wl12xx.board_ref_clock = ref_clock;
  61         wl12xx.board_tcxo_clock = tcxo_clock;
  62         wl12xx.irq = gpio_to_irq(gpio);
  63
  64         res = wl12xx_set_platform_data(&wl12xx);
  65         if (res) {
  66                 pr_err("error setting wl12xx data: %d\n", res);
  67                 return;
  68         }
  69 }
  70 #else
  71 static inline void legacy_init_wl12xx(unsigned ref_clock,
  72                                       unsigned tcxo_clock,
  73                                       int gpio)
  74 {
  75 }
  76 #endif
  77
  78 #ifdef CONFIG_MACH_NOKIA_N8X0
  79 static void __init omap2420_n8x0_legacy_init(void)
  80 {
  81         omap_auxdata_lookup[0].platform_data = n8x0_legacy_init();
  82 }
  83 #else
  84 #define omap2420_n8x0_legacy_init       NULL
  85 #endif
  86
  87 #ifdef CONFIG_ARCH_OMAP3
  88 static void __init hsmmc2_internal_input_clk(void)
  89 {
  90         u32 reg;
  91
  92         reg = omap_ctrl_readl(OMAP343X_CONTROL_DEVCONF1);
  93         reg |= OMAP2_MMCSDIO2ADPCLKISEL;
  94         omap_ctrl_writel(reg, OMAP343X_CONTROL_DEVCONF1);
  95 }
  96
  97 static int omap3_sbc_t3730_twl_callback(struct device *dev,
  98                                            unsigned gpio,
  99                                            unsigned ngpio)
 100 {
 101         int res;
 102
 103         res = gpio_request_one(gpio + 2, GPIOF_OUT_INIT_HIGH,
 104                                "wlan rst");
 105         if (res)
 106                 return res;
 107
 108         gpio_export(gpio, 0);
 109
 110         return 0;
 111 }
 112
 113 static void __init omap3_sbc_t3730_twl_init(void)
 114 {
 115         twl_gpio_auxdata.setup = omap3_sbc_t3730_twl_callback;
 116 }
 117
 118 static void __init omap3_sbc_t3730_legacy_init(void)
 119 {
 120         legacy_init_wl12xx(WL12XX_REFCLOCK_38, 0, 136);
 121         omap_ads7846_init(1, 57, 0, NULL);
 122 }
 123
 124 static void __init omap3_igep0020_legacy_init(void)
 125 {
 126         omap3_igep2_display_init_of();
 127 }
 128
 129 static void __init omap3_evm_legacy_init(void)
 130 {
 131         legacy_init_wl12xx(WL12XX_REFCLOCK_38, 0, 149);
 132 }
 133
 134 static void __init omap3_zoom_legacy_init(void)
 135 {
 136         legacy_init_wl12xx(WL12XX_REFCLOCK_26, 0, 162);
 137 }
 138
 139 static void am35xx_enable_emac_int(void)
 140 {
 141         u32 v;
 142
 143         v = omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR);
 144         v |= (AM35XX_CPGMAC_C0_RX_PULSE_CLR | AM35XX_CPGMAC_C0_TX_PULSE_CLR |
 145               AM35XX_CPGMAC_C0_MISC_PULSE_CLR | AM35XX_CPGMAC_C0_RX_THRESH_CLR);
 146         omap_ctrl_writel(v, AM35XX_CONTROL_LVL_INTR_CLEAR);
 147         omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR); /* OCP barrier */
 148 }
 149
 150 static void am35xx_disable_emac_int(void)
 151 {
 152         u32 v;
 153
 154         v = omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR);
 155         v |= (AM35XX_CPGMAC_C0_RX_PULSE_CLR | AM35XX_CPGMAC_C0_TX_PULSE_CLR);
 156         omap_ctrl_writel(v, AM35XX_CONTROL_LVL_INTR_CLEAR);
 157         omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR); /* OCP barrier */
 158 }
 159
 160 static struct emac_platform_data am35xx_emac_pdata = {
 161         .interrupt_enable       = am35xx_enable_emac_int,
 162         .interrupt_disable      = am35xx_disable_emac_int,
 163 };
 164
 165 static void __init am3517_evm_legacy_init(void)
 166 {
 167         u32 v;
 168
 169         v = omap_ctrl_readl(AM35XX_CONTROL_IP_SW_RESET);
 170         v &= ~AM35XX_CPGMACSS_SW_RST;
 171         omap_ctrl_writel(v, AM35XX_CONTROL_IP_SW_RESET);
 172         omap_ctrl_readl(AM35XX_CONTROL_IP_SW_RESET); /* OCP barrier */
 173 }
 174
 175 static void __init nokia_n900_legacy_init(void)
 176 {
 177         hsmmc2_internal_input_clk();
 178
 179         if (omap_type() == OMAP2_DEVICE_TYPE_SEC) {
 180                 if (IS_ENABLED(CONFIG_ARM_ERRATA_430973)) {
 181                         pr_info("RX-51: Enabling ARM errata 430973 workaround\n");
 182                         /* set IBE to 1 */
 183                         rx51_secure_update_aux_cr(BIT(6), 0);
 184                 } else {
 185                         pr_warning("RX-51: Not enabling ARM errata 430973 workaround\n");
 186                         pr_warning("Thumb binaries may crash randomly without this workaround\n");
 187                 }
 188         }
 189 }
 190 #endif /* CONFIG_ARCH_OMAP3 */
 191
 192 #ifdef CONFIG_ARCH_OMAP4
 193 static void __init omap4_sdp_legacy_init(void)
 194 {
 195         omap_4430sdp_display_init_of();
 196         legacy_init_wl12xx(WL12XX_REFCLOCK_26,
 197                            WL12XX_TCXOCLOCK_26, 53);
 198 }
 199
 200 static void __init omap4_panda_legacy_init(void)
 201 {
 202         omap4_panda_display_init_of();
 203         legacy_init_ehci_clk("auxclk3_ck");
 204         legacy_init_wl12xx(WL12XX_REFCLOCK_38, 0, 53);
 205 }
 206 #endif
 207
 208 #ifdef CONFIG_SOC_OMAP5
 209 static void __init omap5_uevm_legacy_init(void)
 210 {
 211         legacy_init_ehci_clk("auxclk1_ck");
 212 }
 213 #endif
 214
 215 static struct pcs_pdata pcs_pdata;
 216
 217 void omap_pcs_legacy_init(int irq, void (*rearm)(void))
 218 {
 219         pcs_pdata.irq = irq;
 220         pcs_pdata.rearm = rearm;
 221 }
 222
 223 /*
 224  * GPIOs for TWL are initialized by the I2C bus and need custom
 225  * handing until DSS has device tree bindings.
 226  */
 227 void omap_auxdata_legacy_init(struct device *dev)
 228 {
 229         if (dev->platform_data)
 230                 return;
 231
 232         if (strcmp("twl4030-gpio", dev_name(dev)))
 233                 return;
 234
 235         dev->platform_data = &twl_gpio_auxdata;
 236 }
 237
 238 /*
 239  * Few boards still need auxdata populated before we populate
 240  * the dev entries in of_platform_populate().
 241  */
 242 static struct pdata_init auxdata_quirks[] __initdata = {
 243 #ifdef CONFIG_SOC_OMAP2420
 244         { "nokia,n800", omap2420_n8x0_legacy_init, },
 245         { "nokia,n810", omap2420_n8x0_legacy_init, },
 246         { "nokia,n810-wimax", omap2420_n8x0_legacy_init, },
 247 #endif
 248 #ifdef CONFIG_ARCH_OMAP3
 249         { "compulab,omap3-sbc-t3730", omap3_sbc_t3730_twl_init, },
 250 #endif
 251         { /* sentinel */ },
 252 };
 253
 254 struct of_dev_auxdata omap_auxdata_lookup[] __initdata = {
 255 #ifdef CONFIG_MACH_NOKIA_N8X0
 256         OF_DEV_AUXDATA("ti,omap2420-mmc", 0x4809c000, "mmci-omap.0", NULL),
 257 #endif
 258 #ifdef CONFIG_ARCH_OMAP3
 259         OF_DEV_AUXDATA("ti,omap3-padconf", 0x48002030, "48002030.pinmux", &pcs_pdata),
 260         OF_DEV_AUXDATA("ti,omap3-padconf", 0x480025a0, "480025a0.pinmux", &pcs_pdata),
 261         OF_DEV_AUXDATA("ti,omap3-padconf", 0x48002a00, "48002a00.pinmux", &pcs_pdata),
 262         /* Only on am3517 */
 263         OF_DEV_AUXDATA("ti,davinci_mdio", 0x5c030000, "davinci_mdio.0", NULL),
 264         OF_DEV_AUXDATA("ti,am3517-emac", 0x5c000000, "davinci_emac.0",
 265                        &am35xx_emac_pdata),
 266 #endif
 267 #ifdef CONFIG_ARCH_OMAP4
 268         OF_DEV_AUXDATA("ti,omap4-padconf", 0x4a100040, "4a100040.pinmux", &pcs_pdata),
 269         OF_DEV_AUXDATA("ti,omap4-padconf", 0x4a31e040, "4a31e040.pinmux", &pcs_pdata),
 270 #endif
 271         { /* sentinel */ },
 272 };
 273
 274 /*
 275  * Few boards still need to initialize some legacy devices with
 276  * platform data until the drivers support device tree.
 277  */
 278 static struct pdata_init pdata_quirks[] __initdata = {
 279 #ifdef CONFIG_ARCH_OMAP3
 280         { "compulab,omap3-sbc-t3730", omap3_sbc_t3730_legacy_init, },
 281         { "nokia,omap3-n900", nokia_n900_legacy_init, },
 282         { "nokia,omap3-n9", hsmmc2_internal_input_clk, },
 283         { "nokia,omap3-n950", hsmmc2_internal_input_clk, },
 284         { "isee,omap3-igep0020", omap3_igep0020_legacy_init, },
 285         { "ti,omap3-evm-37xx", omap3_evm_legacy_init, },
 286         { "ti,omap3-zoom3", omap3_zoom_legacy_init, },
 287         { "ti,am3517-evm", am3517_evm_legacy_init, },
 288 #endif
 289 #ifdef CONFIG_ARCH_OMAP4
 290         { "ti,omap4-sdp", omap4_sdp_legacy_init, },
 291         { "ti,omap4-panda", omap4_panda_legacy_init, },
 292 #endif
 293 #ifdef CONFIG_SOC_OMAP5
 294         { "ti,omap5-uevm", omap5_uevm_legacy_init, },
 295 #endif
 296         { /* sentinel */ },
 297 };
 298
 299 static void pdata_quirks_check(struct pdata_init *quirks)
 300 {
 301         while (quirks->compatible) {
 302                 if (of_machine_is_compatible(quirks->compatible)) {
 303                         if (quirks->fn)
 304                                 quirks->fn();
 305                         break;
 306                 }
 307                 quirks++;
 308         }
 309 }
 310
 311 void __init pdata_quirks_init(struct of_device_id *omap_dt_match_table)
 312 {
 313         omap_sdrc_init(NULL, NULL);
 314         pdata_quirks_check(auxdata_quirks);
 315         of_platform_populate(NULL, omap_dt_match_table,
 316                              omap_auxdata_lookup, NULL);
 317         pdata_quirks_check(pdata_quirks);
 318 }