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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
5b9ca526 BH |
2 | #include <linux/types.h> |
3 | #include <linux/init.h> | |
4 | #include <linux/delay.h> | |
5 | #include <linux/kernel.h> | |
6 | #include <linux/interrupt.h> | |
7 | #include <linux/spinlock.h> | |
26a2056e | 8 | #include <linux/of_irq.h> |
5b9ca526 BH |
9 | |
10 | #include <asm/pmac_feature.h> | |
11 | #include <asm/pmac_pfunc.h> | |
12 | ||
76a0ee3d PM |
13 | #undef DEBUG |
14 | #ifdef DEBUG | |
5b9ca526 | 15 | #define DBG(fmt...) printk(fmt) |
76a0ee3d PM |
16 | #else |
17 | #define DBG(fmt...) | |
18 | #endif | |
5b9ca526 | 19 | |
7d12e780 | 20 | static irqreturn_t macio_gpio_irq(int irq, void *data) |
5b9ca526 BH |
21 | { |
22 | pmf_do_irq(data); | |
23 | ||
24 | return IRQ_HANDLED; | |
25 | } | |
26 | ||
27 | static int macio_do_gpio_irq_enable(struct pmf_function *func) | |
28 | { | |
0ebfff14 | 29 | unsigned int irq = irq_of_parse_and_map(func->node, 0); |
ef24ba70 | 30 | if (!irq) |
5b9ca526 | 31 | return -EINVAL; |
0ebfff14 | 32 | return request_irq(irq, macio_gpio_irq, 0, func->node->name, func); |
5b9ca526 BH |
33 | } |
34 | ||
35 | static int macio_do_gpio_irq_disable(struct pmf_function *func) | |
36 | { | |
0ebfff14 | 37 | unsigned int irq = irq_of_parse_and_map(func->node, 0); |
ef24ba70 | 38 | if (!irq) |
5b9ca526 | 39 | return -EINVAL; |
0ebfff14 | 40 | free_irq(irq, func); |
5b9ca526 BH |
41 | return 0; |
42 | } | |
43 | ||
44 | static int macio_do_gpio_write(PMF_STD_ARGS, u8 value, u8 mask) | |
45 | { | |
46 | u8 __iomem *addr = (u8 __iomem *)func->driver_data; | |
47 | unsigned long flags; | |
48 | u8 tmp; | |
49 | ||
50 | /* Check polarity */ | |
51 | if (args && args->count && !args->u[0].v) | |
52 | value = ~value; | |
53 | ||
54 | /* Toggle the GPIO */ | |
087d8c7d | 55 | raw_spin_lock_irqsave(&feature_lock, flags); |
5b9ca526 BH |
56 | tmp = readb(addr); |
57 | tmp = (tmp & ~mask) | (value & mask); | |
b7c670d6 RH |
58 | DBG("Do write 0x%02x to GPIO %pOF (%p)\n", |
59 | tmp, func->node, addr); | |
5b9ca526 | 60 | writeb(tmp, addr); |
087d8c7d | 61 | raw_spin_unlock_irqrestore(&feature_lock, flags); |
5b9ca526 BH |
62 | |
63 | return 0; | |
64 | } | |
65 | ||
66 | static int macio_do_gpio_read(PMF_STD_ARGS, u8 mask, int rshift, u8 xor) | |
67 | { | |
68 | u8 __iomem *addr = (u8 __iomem *)func->driver_data; | |
69 | u32 value; | |
70 | ||
71 | /* Check if we have room for reply */ | |
72 | if (args == NULL || args->count == 0 || args->u[0].p == NULL) | |
73 | return -EINVAL; | |
74 | ||
75 | value = readb(addr); | |
76 | *args->u[0].p = ((value & mask) >> rshift) ^ xor; | |
77 | ||
78 | return 0; | |
79 | } | |
80 | ||
81 | static int macio_do_delay(PMF_STD_ARGS, u32 duration) | |
82 | { | |
83 | /* assume we can sleep ! */ | |
84 | msleep((duration + 999) / 1000); | |
85 | return 0; | |
86 | } | |
87 | ||
88 | static struct pmf_handlers macio_gpio_handlers = { | |
89 | .irq_enable = macio_do_gpio_irq_enable, | |
90 | .irq_disable = macio_do_gpio_irq_disable, | |
91 | .write_gpio = macio_do_gpio_write, | |
92 | .read_gpio = macio_do_gpio_read, | |
93 | .delay = macio_do_delay, | |
94 | }; | |
95 | ||
96 | static void macio_gpio_init_one(struct macio_chip *macio) | |
97 | { | |
98 | struct device_node *gparent, *gp; | |
99 | ||
100 | /* | |
101 | * Find the "gpio" parent node | |
102 | */ | |
103 | ||
2c8e65b5 RH |
104 | for_each_child_of_node(macio->of_node, gparent) |
105 | if (of_node_name_eq(gparent, "gpio")) | |
5b9ca526 BH |
106 | break; |
107 | if (gparent == NULL) | |
108 | return; | |
109 | ||
b7c670d6 RH |
110 | DBG("Installing GPIO functions for macio %pOF\n", |
111 | macio->of_node); | |
5b9ca526 BH |
112 | |
113 | /* | |
114 | * Ok, got one, we dont need anything special to track them down, so | |
115 | * we just create them all | |
116 | */ | |
117 | for (gp = NULL; (gp = of_get_next_child(gparent, gp)) != NULL;) { | |
e2eb6392 | 118 | const u32 *reg = of_get_property(gp, "reg", NULL); |
5b9ca526 BH |
119 | unsigned long offset; |
120 | if (reg == NULL) | |
121 | continue; | |
122 | offset = *reg; | |
123 | /* Deal with old style device-tree. We can safely hard code the | |
124 | * offset for now too even if it's a bit gross ... | |
125 | */ | |
126 | if (offset < 0x50) | |
127 | offset += 0x50; | |
128 | offset += (unsigned long)macio->base; | |
129 | pmf_register_driver(gp, &macio_gpio_handlers, (void *)offset); | |
130 | } | |
131 | ||
b7c670d6 RH |
132 | DBG("Calling initial GPIO functions for macio %pOF\n", |
133 | macio->of_node); | |
5b9ca526 BH |
134 | |
135 | /* And now we run all the init ones */ | |
136 | for (gp = NULL; (gp = of_get_next_child(gparent, gp)) != NULL;) | |
137 | pmf_do_functions(gp, NULL, 0, PMF_FLAGS_ON_INIT, NULL); | |
138 | ||
139 | /* Note: We do not at this point implement the "at sleep" or "at wake" | |
140 | * functions. I yet to find any for GPIOs anyway | |
141 | */ | |
142 | } | |
143 | ||
144 | static int macio_do_write_reg32(PMF_STD_ARGS, u32 offset, u32 value, u32 mask) | |
145 | { | |
146 | struct macio_chip *macio = func->driver_data; | |
147 | unsigned long flags; | |
148 | ||
087d8c7d | 149 | raw_spin_lock_irqsave(&feature_lock, flags); |
5b9ca526 | 150 | MACIO_OUT32(offset, (MACIO_IN32(offset) & ~mask) | (value & mask)); |
087d8c7d | 151 | raw_spin_unlock_irqrestore(&feature_lock, flags); |
5b9ca526 BH |
152 | return 0; |
153 | } | |
154 | ||
155 | static int macio_do_read_reg32(PMF_STD_ARGS, u32 offset) | |
156 | { | |
157 | struct macio_chip *macio = func->driver_data; | |
158 | ||
159 | /* Check if we have room for reply */ | |
160 | if (args == NULL || args->count == 0 || args->u[0].p == NULL) | |
161 | return -EINVAL; | |
162 | ||
163 | *args->u[0].p = MACIO_IN32(offset); | |
164 | return 0; | |
165 | } | |
166 | ||
167 | static int macio_do_write_reg8(PMF_STD_ARGS, u32 offset, u8 value, u8 mask) | |
168 | { | |
169 | struct macio_chip *macio = func->driver_data; | |
170 | unsigned long flags; | |
171 | ||
087d8c7d | 172 | raw_spin_lock_irqsave(&feature_lock, flags); |
5b9ca526 | 173 | MACIO_OUT8(offset, (MACIO_IN8(offset) & ~mask) | (value & mask)); |
087d8c7d | 174 | raw_spin_unlock_irqrestore(&feature_lock, flags); |
5b9ca526 BH |
175 | return 0; |
176 | } | |
177 | ||
178 | static int macio_do_read_reg8(PMF_STD_ARGS, u32 offset) | |
179 | { | |
180 | struct macio_chip *macio = func->driver_data; | |
181 | ||
182 | /* Check if we have room for reply */ | |
183 | if (args == NULL || args->count == 0 || args->u[0].p == NULL) | |
184 | return -EINVAL; | |
185 | ||
186 | *((u8 *)(args->u[0].p)) = MACIO_IN8(offset); | |
187 | return 0; | |
188 | } | |
189 | ||
190 | static int macio_do_read_reg32_msrx(PMF_STD_ARGS, u32 offset, u32 mask, | |
191 | u32 shift, u32 xor) | |
192 | { | |
193 | struct macio_chip *macio = func->driver_data; | |
194 | ||
195 | /* Check if we have room for reply */ | |
196 | if (args == NULL || args->count == 0 || args->u[0].p == NULL) | |
197 | return -EINVAL; | |
198 | ||
199 | *args->u[0].p = ((MACIO_IN32(offset) & mask) >> shift) ^ xor; | |
200 | return 0; | |
201 | } | |
202 | ||
203 | static int macio_do_read_reg8_msrx(PMF_STD_ARGS, u32 offset, u32 mask, | |
204 | u32 shift, u32 xor) | |
205 | { | |
206 | struct macio_chip *macio = func->driver_data; | |
207 | ||
208 | /* Check if we have room for reply */ | |
209 | if (args == NULL || args->count == 0 || args->u[0].p == NULL) | |
210 | return -EINVAL; | |
211 | ||
212 | *((u8 *)(args->u[0].p)) = ((MACIO_IN8(offset) & mask) >> shift) ^ xor; | |
213 | return 0; | |
214 | } | |
215 | ||
216 | static int macio_do_write_reg32_slm(PMF_STD_ARGS, u32 offset, u32 shift, | |
217 | u32 mask) | |
218 | { | |
219 | struct macio_chip *macio = func->driver_data; | |
220 | unsigned long flags; | |
221 | u32 tmp, val; | |
222 | ||
223 | /* Check args */ | |
224 | if (args == NULL || args->count == 0) | |
225 | return -EINVAL; | |
226 | ||
087d8c7d | 227 | raw_spin_lock_irqsave(&feature_lock, flags); |
5b9ca526 BH |
228 | tmp = MACIO_IN32(offset); |
229 | val = args->u[0].v << shift; | |
230 | tmp = (tmp & ~mask) | (val & mask); | |
231 | MACIO_OUT32(offset, tmp); | |
087d8c7d | 232 | raw_spin_unlock_irqrestore(&feature_lock, flags); |
5b9ca526 BH |
233 | return 0; |
234 | } | |
235 | ||
236 | static int macio_do_write_reg8_slm(PMF_STD_ARGS, u32 offset, u32 shift, | |
237 | u32 mask) | |
238 | { | |
239 | struct macio_chip *macio = func->driver_data; | |
240 | unsigned long flags; | |
241 | u32 tmp, val; | |
242 | ||
243 | /* Check args */ | |
244 | if (args == NULL || args->count == 0) | |
245 | return -EINVAL; | |
246 | ||
087d8c7d | 247 | raw_spin_lock_irqsave(&feature_lock, flags); |
5b9ca526 BH |
248 | tmp = MACIO_IN8(offset); |
249 | val = args->u[0].v << shift; | |
250 | tmp = (tmp & ~mask) | (val & mask); | |
251 | MACIO_OUT8(offset, tmp); | |
087d8c7d | 252 | raw_spin_unlock_irqrestore(&feature_lock, flags); |
5b9ca526 BH |
253 | return 0; |
254 | } | |
255 | ||
256 | static struct pmf_handlers macio_mmio_handlers = { | |
257 | .write_reg32 = macio_do_write_reg32, | |
258 | .read_reg32 = macio_do_read_reg32, | |
259 | .write_reg8 = macio_do_write_reg8, | |
8f277949 | 260 | .read_reg8 = macio_do_read_reg8, |
5b9ca526 BH |
261 | .read_reg32_msrx = macio_do_read_reg32_msrx, |
262 | .read_reg8_msrx = macio_do_read_reg8_msrx, | |
263 | .write_reg32_slm = macio_do_write_reg32_slm, | |
264 | .write_reg8_slm = macio_do_write_reg8_slm, | |
265 | .delay = macio_do_delay, | |
266 | }; | |
267 | ||
268 | static void macio_mmio_init_one(struct macio_chip *macio) | |
269 | { | |
b7c670d6 RH |
270 | DBG("Installing MMIO functions for macio %pOF\n", |
271 | macio->of_node); | |
5b9ca526 BH |
272 | |
273 | pmf_register_driver(macio->of_node, &macio_mmio_handlers, macio); | |
274 | } | |
275 | ||
276 | static struct device_node *unin_hwclock; | |
277 | ||
278 | static int unin_do_write_reg32(PMF_STD_ARGS, u32 offset, u32 value, u32 mask) | |
279 | { | |
280 | unsigned long flags; | |
281 | ||
087d8c7d | 282 | raw_spin_lock_irqsave(&feature_lock, flags); |
5b9ca526 BH |
283 | /* This is fairly bogus in darwin, but it should work for our needs |
284 | * implemeted that way: | |
285 | */ | |
286 | UN_OUT(offset, (UN_IN(offset) & ~mask) | (value & mask)); | |
087d8c7d | 287 | raw_spin_unlock_irqrestore(&feature_lock, flags); |
5b9ca526 BH |
288 | return 0; |
289 | } | |
290 | ||
291 | ||
292 | static struct pmf_handlers unin_mmio_handlers = { | |
293 | .write_reg32 = unin_do_write_reg32, | |
294 | .delay = macio_do_delay, | |
295 | }; | |
296 | ||
297 | static void uninorth_install_pfunc(void) | |
298 | { | |
299 | struct device_node *np; | |
300 | ||
b7c670d6 RH |
301 | DBG("Installing functions for UniN %pOF\n", |
302 | uninorth_node); | |
5b9ca526 BH |
303 | |
304 | /* | |
305 | * Install handlers for the bridge itself | |
306 | */ | |
307 | pmf_register_driver(uninorth_node, &unin_mmio_handlers, NULL); | |
308 | pmf_do_functions(uninorth_node, NULL, 0, PMF_FLAGS_ON_INIT, NULL); | |
309 | ||
310 | ||
311 | /* | |
312 | * Install handlers for the hwclock child if any | |
313 | */ | |
314 | for (np = NULL; (np = of_get_next_child(uninorth_node, np)) != NULL;) | |
2c8e65b5 | 315 | if (of_node_name_eq(np, "hw-clock")) { |
5b9ca526 BH |
316 | unin_hwclock = np; |
317 | break; | |
318 | } | |
319 | if (unin_hwclock) { | |
b7c670d6 RH |
320 | DBG("Installing functions for UniN clock %pOF\n", |
321 | unin_hwclock); | |
5b9ca526 BH |
322 | pmf_register_driver(unin_hwclock, &unin_mmio_handlers, NULL); |
323 | pmf_do_functions(unin_hwclock, NULL, 0, PMF_FLAGS_ON_INIT, | |
324 | NULL); | |
325 | } | |
326 | } | |
327 | ||
328 | /* We export this as the SMP code might init us early */ | |
329 | int __init pmac_pfunc_base_install(void) | |
330 | { | |
331 | static int pfbase_inited; | |
332 | int i; | |
333 | ||
334 | if (pfbase_inited) | |
335 | return 0; | |
336 | pfbase_inited = 1; | |
337 | ||
e8222502 BH |
338 | if (!machine_is(powermac)) |
339 | return 0; | |
5b9ca526 BH |
340 | |
341 | DBG("Installing base platform functions...\n"); | |
342 | ||
343 | /* | |
344 | * Locate mac-io chips and install handlers | |
345 | */ | |
346 | for (i = 0 ; i < MAX_MACIO_CHIPS; i++) { | |
347 | if (macio_chips[i].of_node) { | |
348 | macio_mmio_init_one(&macio_chips[i]); | |
349 | macio_gpio_init_one(&macio_chips[i]); | |
350 | } | |
351 | } | |
352 | ||
353 | /* | |
354 | * Install handlers for northbridge and direct mapped hwclock | |
355 | * if any. We do not implement the config space access callback | |
356 | * which is only ever used for functions that we do not call in | |
357 | * the current driver (enabling/disabling cells in U2, mostly used | |
358 | * to restore the PCI settings, we do that differently) | |
359 | */ | |
360 | if (uninorth_node && uninorth_base) | |
361 | uninorth_install_pfunc(); | |
362 | ||
363 | DBG("All base functions installed\n"); | |
364 | ||
365 | return 0; | |
366 | } | |
d518b717 | 367 | machine_arch_initcall(powermac, pmac_pfunc_base_install); |
5b9ca526 BH |
368 | |
369 | #ifdef CONFIG_PM | |
370 | ||
371 | /* Those can be called by pmac_feature. Ultimately, I should use a sysdev | |
372 | * or a device, but for now, that's good enough until I sort out some | |
373 | * ordering issues. Also, we do not bother with GPIOs, as so far I yet have | |
374 | * to see a case where a GPIO function has the on-suspend or on-resume bit | |
375 | */ | |
376 | void pmac_pfunc_base_suspend(void) | |
377 | { | |
378 | int i; | |
379 | ||
380 | for (i = 0 ; i < MAX_MACIO_CHIPS; i++) { | |
381 | if (macio_chips[i].of_node) | |
382 | pmf_do_functions(macio_chips[i].of_node, NULL, 0, | |
383 | PMF_FLAGS_ON_SLEEP, NULL); | |
384 | } | |
385 | if (uninorth_node) | |
386 | pmf_do_functions(uninorth_node, NULL, 0, | |
387 | PMF_FLAGS_ON_SLEEP, NULL); | |
388 | if (unin_hwclock) | |
389 | pmf_do_functions(unin_hwclock, NULL, 0, | |
390 | PMF_FLAGS_ON_SLEEP, NULL); | |
391 | } | |
392 | ||
393 | void pmac_pfunc_base_resume(void) | |
394 | { | |
395 | int i; | |
396 | ||
397 | if (unin_hwclock) | |
398 | pmf_do_functions(unin_hwclock, NULL, 0, | |
399 | PMF_FLAGS_ON_WAKE, NULL); | |
400 | if (uninorth_node) | |
401 | pmf_do_functions(uninorth_node, NULL, 0, | |
402 | PMF_FLAGS_ON_WAKE, NULL); | |
403 | for (i = 0 ; i < MAX_MACIO_CHIPS; i++) { | |
404 | if (macio_chips[i].of_node) | |
405 | pmf_do_functions(macio_chips[i].of_node, NULL, 0, | |
406 | PMF_FLAGS_ON_WAKE, NULL); | |
407 | } | |
408 | } | |
409 | ||
410 | #endif /* CONFIG_PM */ |