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

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  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 

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