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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
463ce0e1 BH |
2 | #include <linux/kernel.h> |
3 | #include <linux/serial.h> | |
4 | #include <linux/serial_8250.h> | |
5 | #include <linux/serial_core.h> | |
6 | #include <linux/console.h> | |
7 | #include <linux/pci.h> | |
22ae782f | 8 | #include <linux/of_address.h> |
1a7507c7 | 9 | #include <linux/of_device.h> |
7df5659e | 10 | #include <linux/serial_reg.h> |
463ce0e1 BH |
11 | #include <asm/io.h> |
12 | #include <asm/mmu.h> | |
13 | #include <asm/prom.h> | |
14 | #include <asm/serial.h> | |
15 | #include <asm/udbg.h> | |
16 | #include <asm/pci-bridge.h> | |
17 | #include <asm/ppc-pci.h> | |
18 | ||
19 | #undef DEBUG | |
20 | ||
21 | #ifdef DEBUG | |
22 | #define DBG(fmt...) do { printk(fmt); } while(0) | |
23 | #else | |
24 | #define DBG(fmt...) do { } while(0) | |
25 | #endif | |
26 | ||
27 | #define MAX_LEGACY_SERIAL_PORTS 8 | |
28 | ||
29 | static struct plat_serial8250_port | |
30 | legacy_serial_ports[MAX_LEGACY_SERIAL_PORTS+1]; | |
31 | static struct legacy_serial_info { | |
32 | struct device_node *np; | |
33 | unsigned int speed; | |
34 | unsigned int clock; | |
0ebfff14 | 35 | int irq_check_parent; |
463ce0e1 BH |
36 | phys_addr_t taddr; |
37 | } legacy_serial_infos[MAX_LEGACY_SERIAL_PORTS]; | |
1a7507c7 | 38 | |
ce6d73c9 | 39 | static const struct of_device_id legacy_serial_parents[] __initconst = { |
1a7507c7 PG |
40 | {.type = "soc",}, |
41 | {.type = "tsi-bridge",}, | |
f5903ede ME |
42 | {.type = "opb", }, |
43 | {.compatible = "ibm,opb",}, | |
1a7507c7 PG |
44 | {.compatible = "simple-bus",}, |
45 | {.compatible = "wrs,epld-localbus",}, | |
3bc5ab9b | 46 | {}, |
1a7507c7 PG |
47 | }; |
48 | ||
463ce0e1 BH |
49 | static unsigned int legacy_serial_count; |
50 | static int legacy_serial_console = -1; | |
51 | ||
c4cad90f BH |
52 | static const upf_t legacy_port_flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | |
53 | UPF_SHARE_IRQ | UPF_FIXED_PORT; | |
54 | ||
7df5659e AB |
55 | static unsigned int tsi_serial_in(struct uart_port *p, int offset) |
56 | { | |
57 | unsigned int tmp; | |
58 | offset = offset << p->regshift; | |
59 | if (offset == UART_IIR) { | |
60 | tmp = readl(p->membase + (UART_IIR & ~3)); | |
61 | return (tmp >> 16) & 0xff; /* UART_IIR % 4 == 2 */ | |
62 | } else | |
63 | return readb(p->membase + offset); | |
64 | } | |
65 | ||
66 | static void tsi_serial_out(struct uart_port *p, int offset, int value) | |
67 | { | |
68 | offset = offset << p->regshift; | |
69 | if (!((offset == UART_IER) && (value & UART_IER_UUE))) | |
70 | writeb(value, p->membase + offset); | |
71 | } | |
72 | ||
463ce0e1 BH |
73 | static int __init add_legacy_port(struct device_node *np, int want_index, |
74 | int iotype, phys_addr_t base, | |
b580d46c | 75 | phys_addr_t taddr, unsigned long irq, |
0ebfff14 | 76 | upf_t flags, int irq_check_parent) |
463ce0e1 | 77 | { |
13ae4037 | 78 | const __be32 *clk, *spd, *rs; |
a7f67bdf | 79 | u32 clock = BASE_BAUD * 16; |
13ae4037 | 80 | u32 shift = 0; |
463ce0e1 BH |
81 | int index; |
82 | ||
83 | /* get clock freq. if present */ | |
e2eb6392 | 84 | clk = of_get_property(np, "clock-frequency", NULL); |
31df1678 | 85 | if (clk && *clk) |
f14362d1 | 86 | clock = be32_to_cpup(clk); |
463ce0e1 BH |
87 | |
88 | /* get default speed if present */ | |
e2eb6392 | 89 | spd = of_get_property(np, "current-speed", NULL); |
463ce0e1 | 90 | |
13ae4037 SC |
91 | /* get register shift if present */ |
92 | rs = of_get_property(np, "reg-shift", NULL); | |
93 | if (rs && *rs) | |
94 | shift = be32_to_cpup(rs); | |
95 | ||
463ce0e1 BH |
96 | /* If we have a location index, then try to use it */ |
97 | if (want_index >= 0 && want_index < MAX_LEGACY_SERIAL_PORTS) | |
98 | index = want_index; | |
99 | else | |
100 | index = legacy_serial_count; | |
101 | ||
102 | /* if our index is still out of range, that mean that | |
103 | * array is full, we could scan for a free slot but that | |
104 | * make little sense to bother, just skip the port | |
105 | */ | |
106 | if (index >= MAX_LEGACY_SERIAL_PORTS) | |
107 | return -1; | |
108 | if (index >= legacy_serial_count) | |
109 | legacy_serial_count = index + 1; | |
110 | ||
111 | /* Check if there is a port who already claimed our slot */ | |
b0d436c7 | 112 | if (legacy_serial_infos[index].np != NULL) { |
463ce0e1 BH |
113 | /* if we still have some room, move it, else override */ |
114 | if (legacy_serial_count < MAX_LEGACY_SERIAL_PORTS) { | |
0ebfff14 | 115 | printk(KERN_DEBUG "Moved legacy port %d -> %d\n", |
463ce0e1 BH |
116 | index, legacy_serial_count); |
117 | legacy_serial_ports[legacy_serial_count] = | |
118 | legacy_serial_ports[index]; | |
119 | legacy_serial_infos[legacy_serial_count] = | |
120 | legacy_serial_infos[index]; | |
121 | legacy_serial_count++; | |
122 | } else { | |
0ebfff14 | 123 | printk(KERN_DEBUG "Replacing legacy port %d\n", index); |
463ce0e1 BH |
124 | } |
125 | } | |
126 | ||
127 | /* Now fill the entry */ | |
128 | memset(&legacy_serial_ports[index], 0, | |
129 | sizeof(struct plat_serial8250_port)); | |
130 | if (iotype == UPIO_PORT) | |
131 | legacy_serial_ports[index].iobase = base; | |
132 | else | |
8dacaedf | 133 | legacy_serial_ports[index].mapbase = base; |
7df5659e | 134 | |
463ce0e1 BH |
135 | legacy_serial_ports[index].iotype = iotype; |
136 | legacy_serial_ports[index].uartclk = clock; | |
137 | legacy_serial_ports[index].irq = irq; | |
b580d46c | 138 | legacy_serial_ports[index].flags = flags; |
13ae4037 | 139 | legacy_serial_ports[index].regshift = shift; |
463ce0e1 BH |
140 | legacy_serial_infos[index].taddr = taddr; |
141 | legacy_serial_infos[index].np = of_node_get(np); | |
142 | legacy_serial_infos[index].clock = clock; | |
f14362d1 | 143 | legacy_serial_infos[index].speed = spd ? be32_to_cpup(spd) : 0; |
0ebfff14 | 144 | legacy_serial_infos[index].irq_check_parent = irq_check_parent; |
463ce0e1 | 145 | |
7df5659e AB |
146 | if (iotype == UPIO_TSI) { |
147 | legacy_serial_ports[index].serial_in = tsi_serial_in; | |
148 | legacy_serial_ports[index].serial_out = tsi_serial_out; | |
149 | } | |
150 | ||
b7c670d6 RH |
151 | printk(KERN_DEBUG "Found legacy serial port %d for %pOF\n", |
152 | index, np); | |
0ebfff14 | 153 | printk(KERN_DEBUG " %s=%llx, taddr=%llx, irq=%lx, clk=%d, speed=%d\n", |
463ce0e1 BH |
154 | (iotype == UPIO_PORT) ? "port" : "mem", |
155 | (unsigned long long)base, (unsigned long long)taddr, irq, | |
156 | legacy_serial_ports[index].uartclk, | |
157 | legacy_serial_infos[index].speed); | |
158 | ||
159 | return index; | |
160 | } | |
161 | ||
b580d46c KG |
162 | static int __init add_legacy_soc_port(struct device_node *np, |
163 | struct device_node *soc_dev) | |
164 | { | |
f704b8d1 | 165 | u64 addr; |
4a396dc6 | 166 | const __be32 *addrp; |
be9633e9 | 167 | struct device_node *tsi = of_get_parent(np); |
b580d46c KG |
168 | |
169 | /* We only support ports that have a clock frequency properly | |
170 | * encoded in the device-tree. | |
171 | */ | |
e2eb6392 | 172 | if (of_get_property(np, "clock-frequency", NULL) == NULL) |
b580d46c KG |
173 | return -1; |
174 | ||
13ae4037 SC |
175 | /* if reg-offset don't try to use it */ |
176 | if ((of_get_property(np, "reg-offset", NULL) != NULL)) | |
1e6d1f26 JL |
177 | return -1; |
178 | ||
8d38a5b2 | 179 | /* if rtas uses this device, don't try to use it as well */ |
e2eb6392 | 180 | if (of_get_property(np, "used-by-rtas", NULL) != NULL) |
8d38a5b2 AB |
181 | return -1; |
182 | ||
b580d46c KG |
183 | /* Get the address */ |
184 | addrp = of_get_address(soc_dev, 0, NULL, NULL); | |
185 | if (addrp == NULL) | |
186 | return -1; | |
187 | ||
188 | addr = of_translate_address(soc_dev, addrp); | |
7c6efda5 BH |
189 | if (addr == OF_BAD_ADDR) |
190 | return -1; | |
b580d46c KG |
191 | |
192 | /* Add port, irq will be dealt with later. We passed a translated | |
193 | * IO port value. It will be fixed up later along with the irq | |
194 | */ | |
e5480bdc | 195 | if (of_node_is_type(tsi, "tsi-bridge")) |
c4cad90f | 196 | return add_legacy_port(np, -1, UPIO_TSI, addr, addr, |
ef24ba70 | 197 | 0, legacy_port_flags, 0); |
be9633e9 | 198 | else |
c4cad90f | 199 | return add_legacy_port(np, -1, UPIO_MEM, addr, addr, |
ef24ba70 | 200 | 0, legacy_port_flags, 0); |
b580d46c KG |
201 | } |
202 | ||
463ce0e1 | 203 | static int __init add_legacy_isa_port(struct device_node *np, |
017e0fad | 204 | struct device_node *isa_brg) |
463ce0e1 | 205 | { |
f14362d1 | 206 | const __be32 *reg; |
a7f67bdf | 207 | const char *typep; |
463ce0e1 | 208 | int index = -1; |
f704b8d1 | 209 | u64 taddr; |
463ce0e1 | 210 | |
b7c670d6 | 211 | DBG(" -> add_legacy_isa_port(%pOF)\n", np); |
7c6efda5 | 212 | |
463ce0e1 | 213 | /* Get the ISA port number */ |
e2eb6392 | 214 | reg = of_get_property(np, "reg", NULL); |
463ce0e1 BH |
215 | if (reg == NULL) |
216 | return -1; | |
217 | ||
218 | /* Verify it's an IO port, we don't support anything else */ | |
f14362d1 | 219 | if (!(be32_to_cpu(reg[0]) & 0x00000001)) |
463ce0e1 BH |
220 | return -1; |
221 | ||
222 | /* Now look for an "ibm,aix-loc" property that gives us ordering | |
223 | * if any... | |
224 | */ | |
e2eb6392 | 225 | typep = of_get_property(np, "ibm,aix-loc", NULL); |
463ce0e1 BH |
226 | |
227 | /* If we have a location index, then use it */ | |
228 | if (typep && *typep == 'S') | |
229 | index = simple_strtol(typep+1, NULL, 0) - 1; | |
230 | ||
f704b8d1 BH |
231 | /* Translate ISA address. If it fails, we still register the port |
232 | * with no translated address so that it can be picked up as an IO | |
233 | * port later by the serial driver | |
30925748 BH |
234 | * |
235 | * Note: Don't even try on P8 lpc, we know it's not directly mapped | |
f704b8d1 | 236 | */ |
023b13a5 BH |
237 | if (!of_device_is_compatible(isa_brg, "ibm,power8-lpc") || |
238 | of_get_property(isa_brg, "ranges", NULL)) { | |
30925748 BH |
239 | taddr = of_translate_address(np, reg); |
240 | if (taddr == OF_BAD_ADDR) | |
241 | taddr = 0; | |
242 | } else | |
f704b8d1 | 243 | taddr = 0; |
463ce0e1 BH |
244 | |
245 | /* Add port, irq will be dealt with later */ | |
30925748 | 246 | return add_legacy_port(np, index, UPIO_PORT, be32_to_cpu(reg[1]), |
ef24ba70 | 247 | taddr, 0, legacy_port_flags, 0); |
463ce0e1 BH |
248 | |
249 | } | |
250 | ||
017e0fad | 251 | #ifdef CONFIG_PCI |
463ce0e1 BH |
252 | static int __init add_legacy_pci_port(struct device_node *np, |
253 | struct device_node *pci_dev) | |
254 | { | |
f704b8d1 | 255 | u64 addr, base; |
4a396dc6 | 256 | const __be32 *addrp; |
d2dd482b | 257 | unsigned int flags; |
8dacaedf | 258 | int iotype, index = -1, lindex = 0; |
463ce0e1 | 259 | |
b7c670d6 | 260 | DBG(" -> add_legacy_pci_port(%pOF)\n", np); |
7c6efda5 | 261 | |
463ce0e1 BH |
262 | /* We only support ports that have a clock frequency properly |
263 | * encoded in the device-tree (that is have an fcode). Anything | |
264 | * else can't be used that early and will be normally probed by | |
8dacaedf BH |
265 | * the generic 8250_pci driver later on. The reason is that 8250 |
266 | * compatible UARTs on PCI need all sort of quirks (port offsets | |
267 | * etc...) that this code doesn't know about | |
463ce0e1 | 268 | */ |
e2eb6392 | 269 | if (of_get_property(np, "clock-frequency", NULL) == NULL) |
463ce0e1 | 270 | return -1; |
463ce0e1 BH |
271 | |
272 | /* Get the PCI address. Assume BAR 0 */ | |
d2dd482b | 273 | addrp = of_get_pci_address(pci_dev, 0, NULL, &flags); |
463ce0e1 BH |
274 | if (addrp == NULL) |
275 | return -1; | |
276 | ||
277 | /* We only support BAR 0 for now */ | |
d2dd482b | 278 | iotype = (flags & IORESOURCE_MEM) ? UPIO_MEM : UPIO_PORT; |
463ce0e1 | 279 | addr = of_translate_address(pci_dev, addrp); |
7c6efda5 BH |
280 | if (addr == OF_BAD_ADDR) |
281 | return -1; | |
463ce0e1 BH |
282 | |
283 | /* Set the IO base to the same as the translated address for MMIO, | |
284 | * or to the domain local IO base for PIO (it will be fixed up later) | |
285 | */ | |
286 | if (iotype == UPIO_MEM) | |
287 | base = addr; | |
288 | else | |
4a396dc6 | 289 | base = of_read_number(&addrp[2], 1); |
463ce0e1 BH |
290 | |
291 | /* Try to guess an index... If we have subdevices of the pci dev, | |
292 | * we get to their "reg" property | |
293 | */ | |
294 | if (np != pci_dev) { | |
f14362d1 IM |
295 | const __be32 *reg = of_get_property(np, "reg", NULL); |
296 | if (reg && (be32_to_cpup(reg) < 4)) | |
297 | index = lindex = be32_to_cpup(reg); | |
8dacaedf BH |
298 | } |
299 | ||
300 | /* Local index means it's the Nth port in the PCI chip. Unfortunately | |
301 | * the offset to add here is device specific. We know about those | |
302 | * EXAR ports and we default to the most common case. If your UART | |
303 | * doesn't work for these settings, you'll have to add your own special | |
304 | * cases here | |
305 | */ | |
55b61fec SR |
306 | if (of_device_is_compatible(pci_dev, "pci13a8,152") || |
307 | of_device_is_compatible(pci_dev, "pci13a8,154") || | |
308 | of_device_is_compatible(pci_dev, "pci13a8,158")) { | |
8dacaedf BH |
309 | addr += 0x200 * lindex; |
310 | base += 0x200 * lindex; | |
311 | } else { | |
312 | addr += 8 * lindex; | |
313 | base += 8 * lindex; | |
463ce0e1 BH |
314 | } |
315 | ||
316 | /* Add port, irq will be dealt with later. We passed a translated | |
317 | * IO port value. It will be fixed up later along with the irq | |
318 | */ | |
ef24ba70 | 319 | return add_legacy_port(np, index, iotype, base, addr, 0, |
c4cad90f | 320 | legacy_port_flags, np != pci_dev); |
463ce0e1 | 321 | } |
017e0fad | 322 | #endif |
463ce0e1 | 323 | |
37a801c7 MN |
324 | static void __init setup_legacy_serial_console(int console) |
325 | { | |
30925748 BH |
326 | struct legacy_serial_info *info = &legacy_serial_infos[console]; |
327 | struct plat_serial8250_port *port = &legacy_serial_ports[console]; | |
37a801c7 | 328 | void __iomem *addr; |
13ae4037 SC |
329 | unsigned int stride; |
330 | ||
331 | stride = 1 << port->regshift; | |
37a801c7 | 332 | |
30925748 BH |
333 | /* Check if a translated MMIO address has been found */ |
334 | if (info->taddr) { | |
335 | addr = ioremap(info->taddr, 0x1000); | |
336 | if (addr == NULL) | |
337 | return; | |
13ae4037 | 338 | udbg_uart_init_mmio(addr, stride); |
30925748 BH |
339 | } else { |
340 | /* Check if it's PIO and we support untranslated PIO */ | |
341 | if (port->iotype == UPIO_PORT && isa_io_special) | |
13ae4037 | 342 | udbg_uart_init_pio(port->iobase, stride); |
30925748 BH |
343 | else |
344 | return; | |
345 | } | |
346 | ||
347 | /* Try to query the current speed */ | |
37a801c7 | 348 | if (info->speed == 0) |
30925748 BH |
349 | info->speed = udbg_probe_uart_speed(info->clock); |
350 | ||
351 | /* Set it up */ | |
37a801c7 | 352 | DBG("default console speed = %d\n", info->speed); |
30925748 | 353 | udbg_uart_setup(info->speed, info->clock); |
37a801c7 MN |
354 | } |
355 | ||
463ce0e1 BH |
356 | /* |
357 | * This is called very early, as part of setup_system() or eventually | |
358 | * setup_arch(), basically before anything else in this file. This function | |
359 | * will try to build a list of all the available 8250-compatible serial ports | |
360 | * in the machine using the Open Firmware device-tree. It currently only deals | |
361 | * with ISA and PCI busses but could be extended. It allows a very early boot | |
362 | * console to be initialized, that list is also used later to provide 8250 with | |
363 | * the machine non-PCI ports and to properly pick the default console port | |
364 | */ | |
365 | void __init find_legacy_serial_ports(void) | |
366 | { | |
b580d46c | 367 | struct device_node *np, *stdout = NULL; |
a7f67bdf | 368 | const char *path; |
463ce0e1 BH |
369 | int index; |
370 | ||
371 | DBG(" -> find_legacy_serial_port()\n"); | |
372 | ||
373 | /* Now find out if one of these is out firmware console */ | |
e2eb6392 | 374 | path = of_get_property(of_chosen, "linux,stdout-path", NULL); |
bf3d6afb BH |
375 | if (path == NULL) |
376 | path = of_get_property(of_chosen, "stdout-path", NULL); | |
b580d46c KG |
377 | if (path != NULL) { |
378 | stdout = of_find_node_by_path(path); | |
379 | if (stdout) | |
b7c670d6 | 380 | DBG("stdout is %pOF\n", stdout); |
b580d46c | 381 | } else { |
463ce0e1 | 382 | DBG(" no linux,stdout-path !\n"); |
463ce0e1 | 383 | } |
b580d46c | 384 | |
1a7507c7 | 385 | /* Iterate over all the 16550 ports, looking for known parents */ |
3329c0d1 | 386 | for_each_compatible_node(np, "serial", "ns16550") { |
1a7507c7 PG |
387 | struct device_node *parent = of_get_parent(np); |
388 | if (!parent) | |
389 | continue; | |
3bc5ab9b | 390 | if (of_match_node(legacy_serial_parents, parent) != NULL) { |
07d9fce2 PK |
391 | if (of_device_is_available(np)) { |
392 | index = add_legacy_soc_port(np, np); | |
393 | if (index >= 0 && np == stdout) | |
394 | legacy_serial_console = index; | |
395 | } | |
b580d46c | 396 | } |
1a7507c7 | 397 | of_node_put(parent); |
463ce0e1 BH |
398 | } |
399 | ||
1a7507c7 | 400 | /* Next, fill our array with ISA ports */ |
3329c0d1 | 401 | for_each_node_by_type(np, "serial") { |
463ce0e1 | 402 | struct device_node *isa = of_get_parent(np); |
2c8e65b5 | 403 | if (of_node_name_eq(isa, "isa") || of_node_name_eq(isa, "lpc")) { |
e0f5fa99 BH |
404 | if (of_device_is_available(np)) { |
405 | index = add_legacy_isa_port(np, isa); | |
406 | if (index >= 0 && np == stdout) | |
407 | legacy_serial_console = index; | |
408 | } | |
463ce0e1 BH |
409 | } |
410 | of_node_put(isa); | |
411 | } | |
412 | ||
017e0fad | 413 | #ifdef CONFIG_PCI |
463ce0e1 BH |
414 | /* Next, try to locate PCI ports */ |
415 | for (np = NULL; (np = of_find_all_nodes(np));) { | |
416 | struct device_node *pci, *parent = of_get_parent(np); | |
2c8e65b5 | 417 | if (of_node_name_eq(parent, "isa")) { |
463ce0e1 BH |
418 | of_node_put(parent); |
419 | continue; | |
420 | } | |
2c8e65b5 | 421 | if (!of_node_name_eq(np, "serial") && |
e5480bdc | 422 | !of_node_is_type(np, "serial")) { |
463ce0e1 BH |
423 | of_node_put(parent); |
424 | continue; | |
425 | } | |
48fc7f7e | 426 | /* Check for known pciclass, and also check whether we have |
463ce0e1 BH |
427 | * a device with child nodes for ports or not |
428 | */ | |
55b61fec SR |
429 | if (of_device_is_compatible(np, "pciclass,0700") || |
430 | of_device_is_compatible(np, "pciclass,070002")) | |
463ce0e1 | 431 | pci = np; |
55b61fec SR |
432 | else if (of_device_is_compatible(parent, "pciclass,0700") || |
433 | of_device_is_compatible(parent, "pciclass,070002")) | |
463ce0e1 BH |
434 | pci = parent; |
435 | else { | |
436 | of_node_put(parent); | |
437 | continue; | |
438 | } | |
439 | index = add_legacy_pci_port(np, pci); | |
440 | if (index >= 0 && np == stdout) | |
441 | legacy_serial_console = index; | |
442 | of_node_put(parent); | |
443 | } | |
017e0fad | 444 | #endif |
463ce0e1 BH |
445 | |
446 | DBG("legacy_serial_console = %d\n", legacy_serial_console); | |
37a801c7 MN |
447 | if (legacy_serial_console >= 0) |
448 | setup_legacy_serial_console(legacy_serial_console); | |
463ce0e1 BH |
449 | DBG(" <- find_legacy_serial_port()\n"); |
450 | } | |
451 | ||
452 | static struct platform_device serial_device = { | |
453 | .name = "serial8250", | |
454 | .id = PLAT8250_DEV_PLATFORM, | |
455 | .dev = { | |
456 | .platform_data = legacy_serial_ports, | |
457 | }, | |
458 | }; | |
459 | ||
460 | static void __init fixup_port_irq(int index, | |
461 | struct device_node *np, | |
462 | struct plat_serial8250_port *port) | |
463 | { | |
0ebfff14 BH |
464 | unsigned int virq; |
465 | ||
463ce0e1 BH |
466 | DBG("fixup_port_irq(%d)\n", index); |
467 | ||
0ebfff14 | 468 | virq = irq_of_parse_and_map(np, 0); |
ef24ba70 | 469 | if (!virq && legacy_serial_infos[index].irq_check_parent) { |
0ebfff14 BH |
470 | np = of_get_parent(np); |
471 | if (np == NULL) | |
472 | return; | |
473 | virq = irq_of_parse_and_map(np, 0); | |
474 | of_node_put(np); | |
463ce0e1 | 475 | } |
ef24ba70 | 476 | if (!virq) |
463ce0e1 BH |
477 | return; |
478 | ||
0ebfff14 | 479 | port->irq = virq; |
9deaa53a | 480 | |
3493c853 | 481 | #ifdef CONFIG_SERIAL_8250_FSL |
9deaa53a PG |
482 | if (of_device_is_compatible(np, "fsl,ns16550")) |
483 | port->handle_irq = fsl8250_handle_irq; | |
3493c853 | 484 | #endif |
463ce0e1 BH |
485 | } |
486 | ||
487 | static void __init fixup_port_pio(int index, | |
488 | struct device_node *np, | |
489 | struct plat_serial8250_port *port) | |
490 | { | |
017e0fad | 491 | #ifdef CONFIG_PCI |
463ce0e1 BH |
492 | struct pci_controller *hose; |
493 | ||
494 | DBG("fixup_port_pio(%d)\n", index); | |
495 | ||
496 | hose = pci_find_hose_for_OF_device(np); | |
497 | if (hose) { | |
498 | unsigned long offset = (unsigned long)hose->io_base_virt - | |
499 | #ifdef CONFIG_PPC64 | |
500 | pci_io_base; | |
501 | #else | |
502 | isa_io_base; | |
503 | #endif | |
504 | DBG("port %d, IO %lx -> %lx\n", | |
505 | index, port->iobase, port->iobase + offset); | |
506 | port->iobase += offset; | |
507 | } | |
017e0fad | 508 | #endif |
463ce0e1 BH |
509 | } |
510 | ||
8dacaedf BH |
511 | static void __init fixup_port_mmio(int index, |
512 | struct device_node *np, | |
513 | struct plat_serial8250_port *port) | |
514 | { | |
515 | DBG("fixup_port_mmio(%d)\n", index); | |
516 | ||
517 | port->membase = ioremap(port->mapbase, 0x100); | |
518 | } | |
519 | ||
463ce0e1 BH |
520 | /* |
521 | * This is called as an arch initcall, hopefully before the PCI bus is | |
522 | * probed and/or the 8250 driver loaded since we need to register our | |
523 | * platform devices before 8250 PCI ones are detected as some of them | |
524 | * must properly "override" the platform ones. | |
525 | * | |
526 | * This function fixes up the interrupt value for platform ports as it | |
527 | * couldn't be done earlier before interrupt maps have been parsed. It | |
528 | * also "corrects" the IO address for PIO ports for the same reason, | |
529 | * since earlier, the PHBs virtual IO space wasn't assigned yet. It then | |
530 | * registers all those platform ports for use by the 8250 driver when it | |
531 | * finally loads. | |
532 | */ | |
533 | static int __init serial_dev_init(void) | |
534 | { | |
535 | int i; | |
536 | ||
537 | if (legacy_serial_count == 0) | |
538 | return -ENODEV; | |
539 | ||
540 | /* | |
947af294 | 541 | * Before we register the platform serial devices, we need |
00d70419 | 542 | * to fixup their interrupts and their IO ports. |
463ce0e1 BH |
543 | */ |
544 | DBG("Fixing serial ports interrupts and IO ports ...\n"); | |
545 | ||
546 | for (i = 0; i < legacy_serial_count; i++) { | |
547 | struct plat_serial8250_port *port = &legacy_serial_ports[i]; | |
548 | struct device_node *np = legacy_serial_infos[i].np; | |
549 | ||
ef24ba70 | 550 | if (!port->irq) |
463ce0e1 BH |
551 | fixup_port_irq(i, np, port); |
552 | if (port->iotype == UPIO_PORT) | |
553 | fixup_port_pio(i, np, port); | |
be9633e9 | 554 | if ((port->iotype == UPIO_MEM) || (port->iotype == UPIO_TSI)) |
8dacaedf | 555 | fixup_port_mmio(i, np, port); |
463ce0e1 BH |
556 | } |
557 | ||
558 | DBG("Registering platform serial ports\n"); | |
559 | ||
560 | return platform_device_register(&serial_device); | |
561 | } | |
ee56c474 | 562 | device_initcall(serial_dev_init); |
463ce0e1 BH |
563 | |
564 | ||
025d7917 | 565 | #ifdef CONFIG_SERIAL_8250_CONSOLE |
463ce0e1 BH |
566 | /* |
567 | * This is called very early, as part of console_init() (typically just after | |
568 | * time_init()). This function is respondible for trying to find a good | |
569 | * default console on serial ports. It tries to match the open firmware | |
025d7917 BH |
570 | * default output with one of the available serial console drivers that have |
571 | * been probed earlier by find_legacy_serial_ports() | |
463ce0e1 BH |
572 | */ |
573 | static int __init check_legacy_serial_console(void) | |
574 | { | |
575 | struct device_node *prom_stdout = NULL; | |
025d7917 | 576 | int i, speed = 0, offset = 0; |
a7f67bdf | 577 | const char *name; |
f14362d1 | 578 | const __be32 *spd; |
463ce0e1 BH |
579 | |
580 | DBG(" -> check_legacy_serial_console()\n"); | |
581 | ||
582 | /* The user has requested a console so this is already set up. */ | |
b8757b21 | 583 | if (strstr(boot_command_line, "console=")) { |
463ce0e1 BH |
584 | DBG(" console was specified !\n"); |
585 | return -EBUSY; | |
586 | } | |
587 | ||
588 | if (!of_chosen) { | |
589 | DBG(" of_chosen is NULL !\n"); | |
590 | return -ENODEV; | |
591 | } | |
b580d46c KG |
592 | |
593 | if (legacy_serial_console < 0) { | |
594 | DBG(" legacy_serial_console not found !\n"); | |
595 | return -ENODEV; | |
596 | } | |
463ce0e1 BH |
597 | /* We are getting a weird phandle from OF ... */ |
598 | /* ... So use the full path instead */ | |
e2eb6392 | 599 | name = of_get_property(of_chosen, "linux,stdout-path", NULL); |
bf3d6afb BH |
600 | if (name == NULL) |
601 | name = of_get_property(of_chosen, "stdout-path", NULL); | |
463ce0e1 | 602 | if (name == NULL) { |
bf3d6afb | 603 | DBG(" no stdout-path !\n"); |
463ce0e1 BH |
604 | return -ENODEV; |
605 | } | |
606 | prom_stdout = of_find_node_by_path(name); | |
607 | if (!prom_stdout) { | |
608 | DBG(" can't find stdout package %s !\n", name); | |
609 | return -ENODEV; | |
610 | } | |
b7c670d6 | 611 | DBG("stdout is %pOF\n", prom_stdout); |
463ce0e1 | 612 | |
e2eb6392 | 613 | name = of_get_property(prom_stdout, "name", NULL); |
463ce0e1 BH |
614 | if (!name) { |
615 | DBG(" stdout package has no name !\n"); | |
616 | goto not_found; | |
617 | } | |
e2eb6392 | 618 | spd = of_get_property(prom_stdout, "current-speed", NULL); |
463ce0e1 | 619 | if (spd) |
f14362d1 | 620 | speed = be32_to_cpup(spd); |
463ce0e1 | 621 | |
025d7917 BH |
622 | if (strcmp(name, "serial") != 0) |
623 | goto not_found; | |
624 | ||
625 | /* Look for it in probed array */ | |
626 | for (i = 0; i < legacy_serial_count; i++) { | |
627 | if (prom_stdout != legacy_serial_infos[i].np) | |
628 | continue; | |
629 | offset = i; | |
630 | speed = legacy_serial_infos[i].speed; | |
631 | break; | |
463ce0e1 | 632 | } |
025d7917 | 633 | if (i >= legacy_serial_count) |
463ce0e1 | 634 | goto not_found; |
025d7917 | 635 | |
463ce0e1 BH |
636 | of_node_put(prom_stdout); |
637 | ||
638 | DBG("Found serial console at ttyS%d\n", offset); | |
639 | ||
640 | if (speed) { | |
641 | static char __initdata opt[16]; | |
642 | sprintf(opt, "%d", speed); | |
643 | return add_preferred_console("ttyS", offset, opt); | |
644 | } else | |
645 | return add_preferred_console("ttyS", offset, NULL); | |
646 | ||
647 | not_found: | |
648 | DBG("No preferred console found !\n"); | |
649 | of_node_put(prom_stdout); | |
650 | return -ENODEV; | |
651 | } | |
652 | console_initcall(check_legacy_serial_console); | |
653 | ||
025d7917 | 654 | #endif /* CONFIG_SERIAL_8250_CONSOLE */ |