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
  26 struct pdata_init {
  27         const char *compatible;
  28         void (*fn)(void);
  29 };
  30
  31 struct of_dev_auxdata omap_auxdata_lookup[];
  32 static struct twl4030_gpio_platform_data twl_gpio_auxdata;
  33
  34 /*
  35  * Create alias for USB host PHY clock.
  36  * Remove this when clock phandle can be provided via DT
  37  */
  38 static void __init __used legacy_init_ehci_clk(char *clkname)
  39 {
  40         int ret;
  41
  42         ret = clk_add_alias("main_clk", NULL, clkname, NULL);
  43         if (ret)
  44                 pr_err("%s:Failed to add main_clk alias to %s :%d\n",
  45                        __func__, clkname, ret);
  46 }
  47
  48 #if IS_ENABLED(CONFIG_WL12XX)
  49
  50 static struct wl12xx_platform_data wl12xx __initdata;
  51
  52 static void __init __used legacy_init_wl12xx(unsigned ref_clock,
  53                                              unsigned tcxo_clock,
  54                                              int gpio)
  55 {
  56         int res;
  57
  58         wl12xx.board_ref_clock = ref_clock;
  59         wl12xx.board_tcxo_clock = tcxo_clock;
  60         wl12xx.irq = gpio_to_irq(gpio);
  61
  62         res = wl12xx_set_platform_data(&wl12xx);
  63         if (res) {
  64                 pr_err("error setting wl12xx data: %d\n", res);
  65                 return;
  66         }
  67 }
  68 #else
  69 static inline void legacy_init_wl12xx(unsigned ref_clock,
  70                                       unsigned tcxo_clock,
  71                                       int gpio)
  72 {
  73 }
  74 #endif
  75
  76 #ifdef CONFIG_MACH_NOKIA_N8X0
  77 static void __init omap2420_n8x0_legacy_init(void)
  78 {
  79         omap_auxdata_lookup[0].platform_data = n8x0_legacy_init();
  80 }
  81 #else
  82 #define omap2420_n8x0_legacy_init       NULL
  83 #endif
  84
  85 #ifdef CONFIG_ARCH_OMAP3
  86 static void __init hsmmc2_internal_input_clk(void)
  87 {
  88         u32 reg;
  89
  90         reg = omap_ctrl_readl(OMAP343X_CONTROL_DEVCONF1);
  91         reg |= OMAP2_MMCSDIO2ADPCLKISEL;
  92         omap_ctrl_writel(reg, OMAP343X_CONTROL_DEVCONF1);
  93 }
  94
  95 static int omap3_sbc_t3730_twl_callback(struct device *dev,
  96                                            unsigned gpio,
  97                                            unsigned ngpio)
  98 {
  99         int res;
 100
 101         res = gpio_request_one(gpio + 2, GPIOF_OUT_INIT_HIGH,
 102                                "wlan rst");
 103         if (res)
 104                 return res;
 105
 106         gpio_export(gpio, 0);
 107
 108         return 0;
 109 }
 110
 111 static void __init omap3_sbc_t3730_twl_init(void)
 112 {
 113         twl_gpio_auxdata.setup = omap3_sbc_t3730_twl_callback;
 114 }
 115
 116 static void __init omap3_sbc_t3730_legacy_init(void)
 117 {
 118         legacy_init_wl12xx(WL12XX_REFCLOCK_38, 0, 136);
 119         omap_ads7846_init(1, 57, 0, NULL);
 120 }
 121
 122 static void __init omap3_igep0020_legacy_init(void)
 123 {
 124         omap3_igep2_display_init_of();
 125 }
 126
 127 static void __init omap3_evm_legacy_init(void)
 128 {
 129         legacy_init_wl12xx(WL12XX_REFCLOCK_38, 0, 149);
 130 }
 131
 132 static void __init omap3_zoom_legacy_init(void)
 133 {
 134         legacy_init_wl12xx(WL12XX_REFCLOCK_26, 0, 162);
 135 }
 136
 137 static void am35xx_enable_emac_int(void)
 138 {
 139         u32 v;
 140
 141         v = omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR);
 142         v |= (AM35XX_CPGMAC_C0_RX_PULSE_CLR | AM35XX_CPGMAC_C0_TX_PULSE_CLR |
 143               AM35XX_CPGMAC_C0_MISC_PULSE_CLR | AM35XX_CPGMAC_C0_RX_THRESH_CLR);
 144         omap_ctrl_writel(v, AM35XX_CONTROL_LVL_INTR_CLEAR);
 145         omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR); /* OCP barrier */
 146 }
 147
 148 static void am35xx_disable_emac_int(void)
 149 {
 150         u32 v;
 151
 152         v = omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR);
 153         v |= (AM35XX_CPGMAC_C0_RX_PULSE_CLR | AM35XX_CPGMAC_C0_TX_PULSE_CLR);
 154         omap_ctrl_writel(v, AM35XX_CONTROL_LVL_INTR_CLEAR);
 155         omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR); /* OCP barrier */
 156 }
 157
 158 static struct emac_platform_data am35xx_emac_pdata = {
 159         .interrupt_enable       = am35xx_enable_emac_int,
 160         .interrupt_disable      = am35xx_disable_emac_int,
 161 };
 162
 163 static void __init am3517_evm_legacy_init(void)
 164 {
 165         u32 v;
 166
 167         v = omap_ctrl_readl(AM35XX_CONTROL_IP_SW_RESET);
 168         v &= ~AM35XX_CPGMACSS_SW_RST;
 169         omap_ctrl_writel(v, AM35XX_CONTROL_IP_SW_RESET);
 170         omap_ctrl_readl(AM35XX_CONTROL_IP_SW_RESET); /* OCP barrier */
 171 }
 172 #endif /* CONFIG_ARCH_OMAP3 */
 173
 174 #ifdef CONFIG_ARCH_OMAP4
 175 static void __init omap4_sdp_legacy_init(void)
 176 {
 177         omap_4430sdp_display_init_of();
 178         legacy_init_wl12xx(WL12XX_REFCLOCK_26,
 179                            WL12XX_TCXOCLOCK_26, 53);
 180 }
 181
 182 static void __init omap4_panda_legacy_init(void)
 183 {
 184         omap4_panda_display_init_of();
 185         legacy_init_ehci_clk("auxclk3_ck");
 186         legacy_init_wl12xx(WL12XX_REFCLOCK_38, 0, 53);
 187 }
 188 #endif
 189
 190 #ifdef CONFIG_SOC_OMAP5
 191 static void __init omap5_uevm_legacy_init(void)
 192 {
 193         legacy_init_ehci_clk("auxclk1_ck");
 194 }
 195 #endif
 196
 197 static struct pcs_pdata pcs_pdata;
 198
 199 void omap_pcs_legacy_init(int irq, void (*rearm)(void))
 200 {
 201         pcs_pdata.irq = irq;
 202         pcs_pdata.rearm = rearm;
 203 }
 204
 205 /*
 206  * GPIOs for TWL are initialized by the I2C bus and need custom
 207  * handing until DSS has device tree bindings.
 208  */
 209 void omap_auxdata_legacy_init(struct device *dev)
 210 {
 211         if (dev->platform_data)
 212                 return;
 213
 214         if (strcmp("twl4030-gpio", dev_name(dev)))
 215                 return;
 216
 217         dev->platform_data = &twl_gpio_auxdata;
 218 }
 219
 220 /*
 221  * Few boards still need auxdata populated before we populate
 222  * the dev entries in of_platform_populate().
 223  */
 224 static struct pdata_init auxdata_quirks[] __initdata = {
 225 #ifdef CONFIG_SOC_OMAP2420
 226         { "nokia,n800", omap2420_n8x0_legacy_init, },
 227         { "nokia,n810", omap2420_n8x0_legacy_init, },
 228         { "nokia,n810-wimax", omap2420_n8x0_legacy_init, },
 229 #endif
 230 #ifdef CONFIG_ARCH_OMAP3
 231         { "compulab,omap3-sbc-t3730", omap3_sbc_t3730_twl_init, },
 232 #endif
 233         { /* sentinel */ },
 234 };
 235
 236 struct of_dev_auxdata omap_auxdata_lookup[] __initdata = {
 237 #ifdef CONFIG_MACH_NOKIA_N8X0
 238         OF_DEV_AUXDATA("ti,omap2420-mmc", 0x4809c000, "mmci-omap.0", NULL),
 239 #endif
 240 #ifdef CONFIG_ARCH_OMAP3
 241         OF_DEV_AUXDATA("ti,omap3-padconf", 0x48002030, "48002030.pinmux", &pcs_pdata),
 242         OF_DEV_AUXDATA("ti,omap3-padconf", 0x48002a00, "48002a00.pinmux", &pcs_pdata),
 243         /* Only on am3517 */
 244         OF_DEV_AUXDATA("ti,davinci_mdio", 0x5c030000, "davinci_mdio.0", NULL),
 245         OF_DEV_AUXDATA("ti,am3517-emac", 0x5c000000, "davinci_emac.0",
 246                        &am35xx_emac_pdata),
 247 #endif
 248 #ifdef CONFIG_ARCH_OMAP4
 249         OF_DEV_AUXDATA("ti,omap4-padconf", 0x4a100040, "4a100040.pinmux", &pcs_pdata),
 250         OF_DEV_AUXDATA("ti,omap4-padconf", 0x4a31e040, "4a31e040.pinmux", &pcs_pdata),
 251 #endif
 252         { /* sentinel */ },
 253 };
 254
 255 /*
 256  * Few boards still need to initialize some legacy devices with
 257  * platform data until the drivers support device tree.
 258  */
 259 static struct pdata_init pdata_quirks[] __initdata = {
 260 #ifdef CONFIG_ARCH_OMAP3
 261         { "compulab,omap3-sbc-t3730", omap3_sbc_t3730_legacy_init, },
 262         { "nokia,omap3-n900", hsmmc2_internal_input_clk, },
 263         { "nokia,omap3-n9", hsmmc2_internal_input_clk, },
 264         { "nokia,omap3-n950", hsmmc2_internal_input_clk, },
 265         { "isee,omap3-igep0020", omap3_igep0020_legacy_init, },
 266         { "ti,omap3-evm-37xx", omap3_evm_legacy_init, },
 267         { "ti,omap3-zoom3", omap3_zoom_legacy_init, },
 268         { "ti,am3517-evm", am3517_evm_legacy_init, },
 269 #endif
 270 #ifdef CONFIG_ARCH_OMAP4
 271         { "ti,omap4-sdp", omap4_sdp_legacy_init, },
 272         { "ti,omap4-panda", omap4_panda_legacy_init, },
 273 #endif
 274 #ifdef CONFIG_SOC_OMAP5
 275         { "ti,omap5-uevm", omap5_uevm_legacy_init, },
 276 #endif
 277         { /* sentinel */ },
 278 };
 279
 280 static void pdata_quirks_check(struct pdata_init *quirks)
 281 {
 282         while (quirks->compatible) {
 283                 if (of_machine_is_compatible(quirks->compatible)) {
 284                         if (quirks->fn)
 285                                 quirks->fn();
 286                         break;
 287                 }
 288                 quirks++;
 289         }
 290 }
 291
 292 void __init pdata_quirks_init(struct of_device_id *omap_dt_match_table)
 293 {
 294         omap_sdrc_init(NULL, NULL);
 295         pdata_quirks_check(auxdata_quirks);
 296         of_platform_populate(NULL, omap_dt_match_table,
 297                              omap_auxdata_lookup, NULL);
 298         pdata_quirks_check(pdata_quirks);
 299 }