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Commit | Line | Data |
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13eed989 | 1 | /* |
e95dddb3 | 2 | * Copyright 2011-2013 Freescale Semiconductor, Inc. |
13eed989 SG |
3 | * Copyright 2011 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 | ||
a258561d | 13 | #include <linux/clk.h> |
53bb71da | 14 | #include <linux/clk-provider.h> |
a258561d | 15 | #include <linux/clkdev.h> |
da4a686a | 16 | #include <linux/clocksource.h> |
96574a6d | 17 | #include <linux/cpu.h> |
0575fb75 | 18 | #include <linux/delay.h> |
b9d18dc3 | 19 | #include <linux/export.h> |
13eed989 | 20 | #include <linux/init.h> |
0575fb75 | 21 | #include <linux/io.h> |
13eed989 | 22 | #include <linux/irq.h> |
0529e315 | 23 | #include <linux/irqchip.h> |
13eed989 | 24 | #include <linux/of.h> |
0575fb75 | 25 | #include <linux/of_address.h> |
13eed989 SG |
26 | #include <linux/of_irq.h> |
27 | #include <linux/of_platform.h> | |
96574a6d | 28 | #include <linux/opp.h> |
477fce49 | 29 | #include <linux/phy.h> |
7b6d864b | 30 | #include <linux/reboot.h> |
baa64151 | 31 | #include <linux/regmap.h> |
477fce49 | 32 | #include <linux/micrel_phy.h> |
baa64151 | 33 | #include <linux/mfd/syscon.h> |
13eed989 | 34 | #include <asm/hardware/cache-l2x0.h> |
13eed989 | 35 | #include <asm/mach/arch.h> |
3e549a69 | 36 | #include <asm/mach/map.h> |
9f97da78 | 37 | #include <asm/system_misc.h> |
13eed989 | 38 | |
e3372474 | 39 | #include "common.h" |
e29248c9 | 40 | #include "cpuidle.h" |
50f2de61 | 41 | #include "hardware.h" |
b9d18dc3 | 42 | |
3c03a2fe | 43 | static u32 chip_revision; |
b29b3e6f | 44 | |
b1a3582d | 45 | int imx6q_revision(void) |
b29b3e6f | 46 | { |
3c03a2fe SG |
47 | return chip_revision; |
48 | } | |
b29b3e6f | 49 | |
3c03a2fe SG |
50 | static void __init imx6q_init_revision(void) |
51 | { | |
52 | u32 rev = imx_anatop_get_digprog(); | |
b29b3e6f SG |
53 | |
54 | switch (rev & 0xff) { | |
55 | case 0: | |
3c03a2fe SG |
56 | chip_revision = IMX_CHIP_REVISION_1_0; |
57 | break; | |
b29b3e6f | 58 | case 1: |
3c03a2fe SG |
59 | chip_revision = IMX_CHIP_REVISION_1_1; |
60 | break; | |
b29b3e6f | 61 | case 2: |
3c03a2fe SG |
62 | chip_revision = IMX_CHIP_REVISION_1_2; |
63 | break; | |
b29b3e6f | 64 | default: |
3c03a2fe | 65 | chip_revision = IMX_CHIP_REVISION_UNKNOWN; |
b29b3e6f | 66 | } |
3c03a2fe SG |
67 | |
68 | mxc_set_cpu_type(rev >> 16 & 0xff); | |
b29b3e6f SG |
69 | } |
70 | ||
7b6d864b | 71 | static void imx6q_restart(enum reboot_mode mode, const char *cmd) |
0575fb75 SG |
72 | { |
73 | struct device_node *np; | |
74 | void __iomem *wdog_base; | |
75 | ||
76 | np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-wdt"); | |
77 | wdog_base = of_iomap(np, 0); | |
78 | if (!wdog_base) | |
79 | goto soft; | |
80 | ||
81 | imx_src_prepare_restart(); | |
82 | ||
83 | /* enable wdog */ | |
84 | writew_relaxed(1 << 2, wdog_base); | |
85 | /* write twice to ensure the request will not get ignored */ | |
86 | writew_relaxed(1 << 2, wdog_base); | |
87 | ||
88 | /* wait for reset to assert ... */ | |
89 | mdelay(500); | |
90 | ||
91 | pr_err("Watchdog reset failed to assert reset\n"); | |
92 | ||
93 | /* delay to allow the serial port to show the message */ | |
94 | mdelay(50); | |
95 | ||
96 | soft: | |
97 | /* we'll take a jump through zero as a poor second */ | |
98 | soft_restart(0); | |
99 | } | |
100 | ||
477fce49 RZ |
101 | /* For imx6q sabrelite board: set KSZ9021RN RGMII pad skew */ |
102 | static int ksz9021rn_phy_fixup(struct phy_device *phydev) | |
103 | { | |
9f9ba0fd | 104 | if (IS_BUILTIN(CONFIG_PHYLIB)) { |
ef441806 SG |
105 | /* min rx data delay */ |
106 | phy_write(phydev, 0x0b, 0x8105); | |
107 | phy_write(phydev, 0x0c, 0x0000); | |
477fce49 | 108 | |
ef441806 SG |
109 | /* max rx/tx clock delay, min rx/tx control delay */ |
110 | phy_write(phydev, 0x0b, 0x8104); | |
111 | phy_write(phydev, 0x0c, 0xf0f0); | |
112 | phy_write(phydev, 0x0b, 0x104); | |
113 | } | |
477fce49 RZ |
114 | |
115 | return 0; | |
116 | } | |
117 | ||
a258561d RZ |
118 | static void __init imx6q_sabrelite_cko1_setup(void) |
119 | { | |
120 | struct clk *cko1_sel, *ahb, *cko1; | |
121 | unsigned long rate; | |
122 | ||
123 | cko1_sel = clk_get_sys(NULL, "cko1_sel"); | |
124 | ahb = clk_get_sys(NULL, "ahb"); | |
125 | cko1 = clk_get_sys(NULL, "cko1"); | |
126 | if (IS_ERR(cko1_sel) || IS_ERR(ahb) || IS_ERR(cko1)) { | |
127 | pr_err("cko1 setup failed!\n"); | |
128 | goto put_clk; | |
129 | } | |
130 | clk_set_parent(cko1_sel, ahb); | |
131 | rate = clk_round_rate(cko1, 16000000); | |
132 | clk_set_rate(cko1, rate); | |
a258561d RZ |
133 | put_clk: |
134 | if (!IS_ERR(cko1_sel)) | |
135 | clk_put(cko1_sel); | |
136 | if (!IS_ERR(ahb)) | |
137 | clk_put(ahb); | |
138 | if (!IS_ERR(cko1)) | |
139 | clk_put(cko1); | |
140 | } | |
141 | ||
071dea50 RZ |
142 | static void __init imx6q_sabrelite_init(void) |
143 | { | |
9f9ba0fd | 144 | if (IS_BUILTIN(CONFIG_PHYLIB)) |
ef441806 | 145 | phy_register_fixup_for_uid(PHY_ID_KSZ9021, MICREL_PHY_ID_MASK, |
071dea50 | 146 | ksz9021rn_phy_fixup); |
a258561d | 147 | imx6q_sabrelite_cko1_setup(); |
071dea50 RZ |
148 | } |
149 | ||
e7eccc7e NC |
150 | static void __init imx6q_sabresd_cko1_setup(void) |
151 | { | |
152 | struct clk *cko1_sel, *pll4, *pll4_post, *cko1; | |
153 | unsigned long rate; | |
154 | ||
155 | cko1_sel = clk_get_sys(NULL, "cko1_sel"); | |
156 | pll4 = clk_get_sys(NULL, "pll4_audio"); | |
157 | pll4_post = clk_get_sys(NULL, "pll4_post_div"); | |
158 | cko1 = clk_get_sys(NULL, "cko1"); | |
159 | if (IS_ERR(cko1_sel) || IS_ERR(pll4) | |
160 | || IS_ERR(pll4_post) || IS_ERR(cko1)) { | |
161 | pr_err("cko1 setup failed!\n"); | |
162 | goto put_clk; | |
163 | } | |
164 | /* | |
165 | * Setting pll4 at 768MHz (24MHz * 32) | |
166 | * So its child clock can get 24MHz easily | |
167 | */ | |
168 | clk_set_rate(pll4, 768000000); | |
169 | ||
170 | clk_set_parent(cko1_sel, pll4_post); | |
171 | rate = clk_round_rate(cko1, 24000000); | |
172 | clk_set_rate(cko1, rate); | |
173 | put_clk: | |
174 | if (!IS_ERR(cko1_sel)) | |
175 | clk_put(cko1_sel); | |
176 | if (!IS_ERR(pll4_post)) | |
177 | clk_put(pll4_post); | |
178 | if (!IS_ERR(pll4)) | |
179 | clk_put(pll4); | |
180 | if (!IS_ERR(cko1)) | |
181 | clk_put(cko1); | |
182 | } | |
183 | ||
184 | static void __init imx6q_sabresd_init(void) | |
185 | { | |
186 | imx6q_sabresd_cko1_setup(); | |
187 | } | |
188 | ||
d6e0d9fc FL |
189 | static void __init imx6q_1588_init(void) |
190 | { | |
191 | struct regmap *gpr; | |
192 | ||
193 | gpr = syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr"); | |
194 | if (!IS_ERR(gpr)) | |
195 | regmap_update_bits(gpr, 0x4, 1 << 21, 1 << 21); | |
196 | else | |
197 | pr_err("failed to find fsl,imx6q-iomux-gpr regmap\n"); | |
198 | ||
199 | } | |
396bf1c2 RZ |
200 | static void __init imx6q_usb_init(void) |
201 | { | |
e95dddb3 | 202 | imx_anatop_usb_chrg_detect_disable(); |
396bf1c2 RZ |
203 | } |
204 | ||
13eed989 SG |
205 | static void __init imx6q_init_machine(void) |
206 | { | |
477fce49 | 207 | if (of_machine_is_compatible("fsl,imx6q-sabrelite")) |
071dea50 | 208 | imx6q_sabrelite_init(); |
e7eccc7e NC |
209 | else if (of_machine_is_compatible("fsl,imx6q-sabresd") || |
210 | of_machine_is_compatible("fsl,imx6dl-sabresd")) | |
211 | imx6q_sabresd_init(); | |
477fce49 | 212 | |
13eed989 SG |
213 | of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); |
214 | ||
e95dddb3 | 215 | imx_anatop_init(); |
13eed989 | 216 | imx6q_pm_init(); |
396bf1c2 | 217 | imx6q_usb_init(); |
d6e0d9fc | 218 | imx6q_1588_init(); |
13eed989 SG |
219 | } |
220 | ||
96574a6d SG |
221 | #define OCOTP_CFG3 0x440 |
222 | #define OCOTP_CFG3_SPEED_SHIFT 16 | |
223 | #define OCOTP_CFG3_SPEED_1P2GHZ 0x3 | |
224 | ||
225 | static void __init imx6q_opp_check_1p2ghz(struct device *cpu_dev) | |
226 | { | |
227 | struct device_node *np; | |
228 | void __iomem *base; | |
229 | u32 val; | |
230 | ||
231 | np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-ocotp"); | |
232 | if (!np) { | |
233 | pr_warn("failed to find ocotp node\n"); | |
234 | return; | |
235 | } | |
236 | ||
237 | base = of_iomap(np, 0); | |
238 | if (!base) { | |
239 | pr_warn("failed to map ocotp\n"); | |
240 | goto put_node; | |
241 | } | |
242 | ||
243 | val = readl_relaxed(base + OCOTP_CFG3); | |
244 | val >>= OCOTP_CFG3_SPEED_SHIFT; | |
245 | if ((val & 0x3) != OCOTP_CFG3_SPEED_1P2GHZ) | |
246 | if (opp_disable(cpu_dev, 1200000000)) | |
247 | pr_warn("failed to disable 1.2 GHz OPP\n"); | |
248 | ||
249 | put_node: | |
250 | of_node_put(np); | |
251 | } | |
252 | ||
253 | static void __init imx6q_opp_init(struct device *cpu_dev) | |
254 | { | |
255 | struct device_node *np; | |
256 | ||
257 | np = of_find_node_by_path("/cpus/cpu@0"); | |
258 | if (!np) { | |
259 | pr_warn("failed to find cpu0 node\n"); | |
260 | return; | |
261 | } | |
262 | ||
263 | cpu_dev->of_node = np; | |
264 | if (of_init_opp_table(cpu_dev)) { | |
265 | pr_warn("failed to init OPP table\n"); | |
266 | goto put_node; | |
267 | } | |
268 | ||
269 | imx6q_opp_check_1p2ghz(cpu_dev); | |
270 | ||
271 | put_node: | |
272 | of_node_put(np); | |
273 | } | |
274 | ||
f8c11b2b | 275 | static struct platform_device imx6q_cpufreq_pdev = { |
96574a6d SG |
276 | .name = "imx6q-cpufreq", |
277 | }; | |
278 | ||
b9d18dc3 RL |
279 | static void __init imx6q_init_late(void) |
280 | { | |
e5f9dec8 SG |
281 | /* |
282 | * WAIT mode is broken on TO 1.0 and 1.1, so there is no point | |
283 | * to run cpuidle on them. | |
284 | */ | |
285 | if (imx6q_revision() > IMX_CHIP_REVISION_1_1) | |
286 | imx6q_cpuidle_init(); | |
96574a6d SG |
287 | |
288 | if (IS_ENABLED(CONFIG_ARM_IMX6Q_CPUFREQ)) { | |
289 | imx6q_opp_init(&imx6q_cpufreq_pdev.dev); | |
290 | platform_device_register(&imx6q_cpufreq_pdev); | |
291 | } | |
b9d18dc3 RL |
292 | } |
293 | ||
13eed989 SG |
294 | static void __init imx6q_map_io(void) |
295 | { | |
3e549a69 | 296 | debug_ll_io_init(); |
13eed989 SG |
297 | imx_scu_map_io(); |
298 | } | |
299 | ||
b3a9c315 DB |
300 | #ifdef CONFIG_CACHE_L2X0 |
301 | static void __init imx6q_init_l2cache(void) | |
302 | { | |
303 | void __iomem *l2x0_base; | |
304 | struct device_node *np; | |
305 | unsigned int val; | |
306 | ||
307 | np = of_find_compatible_node(NULL, NULL, "arm,pl310-cache"); | |
308 | if (!np) | |
309 | goto out; | |
310 | ||
311 | l2x0_base = of_iomap(np, 0); | |
312 | if (!l2x0_base) { | |
313 | of_node_put(np); | |
314 | goto out; | |
315 | } | |
316 | ||
317 | /* Configure the L2 PREFETCH and POWER registers */ | |
318 | val = readl_relaxed(l2x0_base + L2X0_PREFETCH_CTRL); | |
319 | val |= 0x70800000; | |
320 | writel_relaxed(val, l2x0_base + L2X0_PREFETCH_CTRL); | |
321 | val = L2X0_DYNAMIC_CLK_GATING_EN | L2X0_STNDBY_MODE_EN; | |
322 | writel_relaxed(val, l2x0_base + L2X0_POWER_CTRL); | |
323 | ||
324 | iounmap(l2x0_base); | |
325 | of_node_put(np); | |
326 | ||
327 | out: | |
328 | l2x0_of_init(0, ~0UL); | |
329 | } | |
330 | #else | |
331 | static inline void imx6q_init_l2cache(void) {} | |
332 | #endif | |
333 | ||
13eed989 SG |
334 | static void __init imx6q_init_irq(void) |
335 | { | |
3c03a2fe | 336 | imx6q_init_revision(); |
b3a9c315 | 337 | imx6q_init_l2cache(); |
13eed989 SG |
338 | imx_src_init(); |
339 | imx_gpc_init(); | |
0529e315 | 340 | irqchip_init(); |
13eed989 SG |
341 | } |
342 | ||
343 | static void __init imx6q_timer_init(void) | |
344 | { | |
53bb71da | 345 | of_clk_init(NULL); |
da4a686a | 346 | clocksource_of_init(); |
3c03a2fe SG |
347 | imx_print_silicon_rev(cpu_is_imx6dl() ? "i.MX6DL" : "i.MX6Q", |
348 | imx6q_revision()); | |
13eed989 SG |
349 | } |
350 | ||
13eed989 | 351 | static const char *imx6q_dt_compat[] __initdata = { |
3c03a2fe | 352 | "fsl,imx6dl", |
3f8976d9 | 353 | "fsl,imx6q", |
13eed989 SG |
354 | NULL, |
355 | }; | |
356 | ||
3c03a2fe | 357 | DT_MACHINE_START(IMX6Q, "Freescale i.MX6 Quad/DualLite (Device Tree)") |
e4f2d979 | 358 | .smp = smp_ops(imx_smp_ops), |
13eed989 SG |
359 | .map_io = imx6q_map_io, |
360 | .init_irq = imx6q_init_irq, | |
6bb27d73 | 361 | .init_time = imx6q_timer_init, |
13eed989 | 362 | .init_machine = imx6q_init_machine, |
b9d18dc3 | 363 | .init_late = imx6q_init_late, |
13eed989 | 364 | .dt_compat = imx6q_dt_compat, |
0575fb75 | 365 | .restart = imx6q_restart, |
13eed989 | 366 | MACHINE_END |