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 } 319