1 #include <linux/types.h>
2 #include <linux/init.h>
3 #include <linux/delay.h>
4 #include <linux/kernel.h>
5 #include <linux/interrupt.h>
6 #include <linux/spinlock.h>
8 #include <asm/pmac_feature.h>
9 #include <asm/pmac_pfunc.h>
13 #define DBG(fmt...) printk(fmt)
18 static irqreturn_t macio_gpio_irq(int irq, void *data, struct pt_regs *regs)
25 static int macio_do_gpio_irq_enable(struct pmf_function *func)
27 unsigned int irq = irq_of_parse_and_map(func->node, 0);
30 return request_irq(irq, macio_gpio_irq, 0, func->node->name, func);
33 static int macio_do_gpio_irq_disable(struct pmf_function *func)
35 unsigned int irq = irq_of_parse_and_map(func->node, 0);
42 static int macio_do_gpio_write(PMF_STD_ARGS, u8 value, u8 mask)
44 u8 __iomem *addr = (u8 __iomem *)func->driver_data;
49 if (args && args->count && !args->u[0].v)
53 spin_lock_irqsave(&feature_lock, flags);
55 tmp = (tmp & ~mask) | (value & mask);
56 DBG("Do write 0x%02x to GPIO %s (%p)\n",
57 tmp, func->node->full_name, addr);
59 spin_unlock_irqrestore(&feature_lock, flags);
64 static int macio_do_gpio_read(PMF_STD_ARGS, u8 mask, int rshift, u8 xor)
66 u8 __iomem *addr = (u8 __iomem *)func->driver_data;
69 /* Check if we have room for reply */
70 if (args == NULL || args->count == 0 || args->u[0].p == NULL)
74 *args->u[0].p = ((value & mask) >> rshift) ^ xor;
79 static int macio_do_delay(PMF_STD_ARGS, u32 duration)
81 /* assume we can sleep ! */
82 msleep((duration + 999) / 1000);
86 static struct pmf_handlers macio_gpio_handlers = {
87 .irq_enable = macio_do_gpio_irq_enable,
88 .irq_disable = macio_do_gpio_irq_disable,
89 .write_gpio = macio_do_gpio_write,
90 .read_gpio = macio_do_gpio_read,
91 .delay = macio_do_delay,
94 static void macio_gpio_init_one(struct macio_chip *macio)
96 struct device_node *gparent, *gp;
99 * Find the "gpio" parent node
103 (gparent = of_get_next_child(macio->of_node, gparent)) != NULL;)
104 if (strcmp(gparent->name, "gpio") == 0)
109 DBG("Installing GPIO functions for macio %s\n",
110 macio->of_node->full_name);
113 * Ok, got one, we dont need anything special to track them down, so
114 * we just create them all
116 for (gp = NULL; (gp = of_get_next_child(gparent, gp)) != NULL;) {
117 u32 *reg = (u32 *)get_property(gp, "reg", NULL);
118 unsigned long offset;
122 /* Deal with old style device-tree. We can safely hard code the
123 * offset for now too even if it's a bit gross ...
127 offset += (unsigned long)macio->base;
128 pmf_register_driver(gp, &macio_gpio_handlers, (void *)offset);
131 DBG("Calling initial GPIO functions for macio %s\n",
132 macio->of_node->full_name);
134 /* And now we run all the init ones */
135 for (gp = NULL; (gp = of_get_next_child(gparent, gp)) != NULL;)
136 pmf_do_functions(gp, NULL, 0, PMF_FLAGS_ON_INIT, NULL);
138 /* Note: We do not at this point implement the "at sleep" or "at wake"
139 * functions. I yet to find any for GPIOs anyway
143 static int macio_do_write_reg32(PMF_STD_ARGS, u32 offset, u32 value, u32 mask)
145 struct macio_chip *macio = func->driver_data;
148 spin_lock_irqsave(&feature_lock, flags);
149 MACIO_OUT32(offset, (MACIO_IN32(offset) & ~mask) | (value & mask));
150 spin_unlock_irqrestore(&feature_lock, flags);
154 static int macio_do_read_reg32(PMF_STD_ARGS, u32 offset)
156 struct macio_chip *macio = func->driver_data;
158 /* Check if we have room for reply */
159 if (args == NULL || args->count == 0 || args->u[0].p == NULL)
162 *args->u[0].p = MACIO_IN32(offset);
166 static int macio_do_write_reg8(PMF_STD_ARGS, u32 offset, u8 value, u8 mask)
168 struct macio_chip *macio = func->driver_data;
171 spin_lock_irqsave(&feature_lock, flags);
172 MACIO_OUT8(offset, (MACIO_IN8(offset) & ~mask) | (value & mask));
173 spin_unlock_irqrestore(&feature_lock, flags);
177 static int macio_do_read_reg8(PMF_STD_ARGS, u32 offset)
179 struct macio_chip *macio = func->driver_data;
181 /* Check if we have room for reply */
182 if (args == NULL || args->count == 0 || args->u[0].p == NULL)
185 *((u8 *)(args->u[0].p)) = MACIO_IN8(offset);
189 static int macio_do_read_reg32_msrx(PMF_STD_ARGS, u32 offset, u32 mask,
192 struct macio_chip *macio = func->driver_data;
194 /* Check if we have room for reply */
195 if (args == NULL || args->count == 0 || args->u[0].p == NULL)
198 *args->u[0].p = ((MACIO_IN32(offset) & mask) >> shift) ^ xor;
202 static int macio_do_read_reg8_msrx(PMF_STD_ARGS, u32 offset, u32 mask,
205 struct macio_chip *macio = func->driver_data;
207 /* Check if we have room for reply */
208 if (args == NULL || args->count == 0 || args->u[0].p == NULL)
211 *((u8 *)(args->u[0].p)) = ((MACIO_IN8(offset) & mask) >> shift) ^ xor;
215 static int macio_do_write_reg32_slm(PMF_STD_ARGS, u32 offset, u32 shift,
218 struct macio_chip *macio = func->driver_data;
223 if (args == NULL || args->count == 0)
226 spin_lock_irqsave(&feature_lock, flags);
227 tmp = MACIO_IN32(offset);
228 val = args->u[0].v << shift;
229 tmp = (tmp & ~mask) | (val & mask);
230 MACIO_OUT32(offset, tmp);
231 spin_unlock_irqrestore(&feature_lock, flags);
235 static int macio_do_write_reg8_slm(PMF_STD_ARGS, u32 offset, u32 shift,
238 struct macio_chip *macio = func->driver_data;
243 if (args == NULL || args->count == 0)
246 spin_lock_irqsave(&feature_lock, flags);
247 tmp = MACIO_IN8(offset);
248 val = args->u[0].v << shift;
249 tmp = (tmp & ~mask) | (val & mask);
250 MACIO_OUT8(offset, tmp);
251 spin_unlock_irqrestore(&feature_lock, flags);
255 static struct pmf_handlers macio_mmio_handlers = {
256 .write_reg32 = macio_do_write_reg32,
257 .read_reg32 = macio_do_read_reg32,
258 .write_reg8 = macio_do_write_reg8,
259 .read_reg32 = macio_do_read_reg8,
260 .read_reg32_msrx = macio_do_read_reg32_msrx,
261 .read_reg8_msrx = macio_do_read_reg8_msrx,
262 .write_reg32_slm = macio_do_write_reg32_slm,
263 .write_reg8_slm = macio_do_write_reg8_slm,
264 .delay = macio_do_delay,
267 static void macio_mmio_init_one(struct macio_chip *macio)
269 DBG("Installing MMIO functions for macio %s\n",
270 macio->of_node->full_name);
272 pmf_register_driver(macio->of_node, &macio_mmio_handlers, macio);
275 static struct device_node *unin_hwclock;
277 static int unin_do_write_reg32(PMF_STD_ARGS, u32 offset, u32 value, u32 mask)
281 spin_lock_irqsave(&feature_lock, flags);
282 /* This is fairly bogus in darwin, but it should work for our needs
283 * implemeted that way:
285 UN_OUT(offset, (UN_IN(offset) & ~mask) | (value & mask));
286 spin_unlock_irqrestore(&feature_lock, flags);
291 static struct pmf_handlers unin_mmio_handlers = {
292 .write_reg32 = unin_do_write_reg32,
293 .delay = macio_do_delay,
296 static void uninorth_install_pfunc(void)
298 struct device_node *np;
300 DBG("Installing functions for UniN %s\n",
301 uninorth_node->full_name);
304 * Install handlers for the bridge itself
306 pmf_register_driver(uninorth_node, &unin_mmio_handlers, NULL);
307 pmf_do_functions(uninorth_node, NULL, 0, PMF_FLAGS_ON_INIT, NULL);
311 * Install handlers for the hwclock child if any
313 for (np = NULL; (np = of_get_next_child(uninorth_node, np)) != NULL;)
314 if (strcmp(np->name, "hw-clock") == 0) {
319 DBG("Installing functions for UniN clock %s\n",
320 unin_hwclock->full_name);
321 pmf_register_driver(unin_hwclock, &unin_mmio_handlers, NULL);
322 pmf_do_functions(unin_hwclock, NULL, 0, PMF_FLAGS_ON_INIT,
327 /* We export this as the SMP code might init us early */
328 int __init pmac_pfunc_base_install(void)
330 static int pfbase_inited;
337 if (!machine_is(powermac))
340 DBG("Installing base platform functions...\n");
343 * Locate mac-io chips and install handlers
345 for (i = 0 ; i < MAX_MACIO_CHIPS; i++) {
346 if (macio_chips[i].of_node) {
347 macio_mmio_init_one(&macio_chips[i]);
348 macio_gpio_init_one(&macio_chips[i]);
353 * Install handlers for northbridge and direct mapped hwclock
354 * if any. We do not implement the config space access callback
355 * which is only ever used for functions that we do not call in
356 * the current driver (enabling/disabling cells in U2, mostly used
357 * to restore the PCI settings, we do that differently)
359 if (uninorth_node && uninorth_base)
360 uninorth_install_pfunc();
362 DBG("All base functions installed\n");
367 arch_initcall(pmac_pfunc_base_install);
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
376 void pmac_pfunc_base_suspend(void)
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);
386 pmf_do_functions(uninorth_node, NULL, 0,
387 PMF_FLAGS_ON_SLEEP, NULL);
389 pmf_do_functions(unin_hwclock, NULL, 0,
390 PMF_FLAGS_ON_SLEEP, NULL);
393 void pmac_pfunc_base_resume(void)
398 pmf_do_functions(unin_hwclock, NULL, 0,
399 PMF_FLAGS_ON_WAKE, NULL);
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);
410 #endif /* CONFIG_PM */