projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 656ad58e OH |
1 | /* |
| 2 | * Copyright (c) 2016 IBM Corporation. | |
| 3 | * | |
| 4 | * This program is free software; you can redistribute it and/or | |
| 5 | * modify it under the terms of the GNU General Public License | |
| 6 | * as published by the Free Software Foundation; either version | |
| 7 | * 2 of the License, or (at your option) any later version. | |
| 8 | */ | |
| 9 | ||
| 10 | #include "ops.h" | |
| 11 | #include "stdio.h" | |
| 12 | #include "io.h" | |
| 13 | #include <libfdt.h> | |
| 14 | #include "../include/asm/opal-api.h" | |
| 15 | ||
| 16 | #ifdef __powerpc64__ | |
| 17 | ||
| 18 | /* Global OPAL struct used by opal-call.S */ | |
| 19 | struct opal { | |
| 20 | u64 base; | |
| 21 | u64 entry; | |
| 22 | } opal; | |
| 23 | ||
| 24 | static u32 opal_con_id; | |
| 25 | ||
| 26 | int64_t opal_console_write(int64_t term_number, u64 *length, const u8 *buffer); | |
| 27 | int64_t opal_console_read(int64_t term_number, uint64_t *length, u8 *buffer); | |
| 28 | int64_t opal_console_write_buffer_space(uint64_t term_number, uint64_t *length); | |
| 29 | int64_t opal_console_flush(uint64_t term_number); | |
| 30 | int64_t opal_poll_events(uint64_t *outstanding_event_mask); | |
| 31 | ||
| 32 | static int opal_con_open(void) | |
| 33 | { | |
| 34 | return 0; | |
| 35 | } | |
| 36 | ||
| 37 | static void opal_con_putc(unsigned char c) | |
| 38 | { | |
| 39 | int64_t rc; | |
| 40 | uint64_t olen, len; | |
| 41 | ||
| 42 | do { | |
| 43 | rc = opal_console_write_buffer_space(opal_con_id, &olen); | |
| 44 | len = be64_to_cpu(olen); | |
| 45 | if (rc) | |
| 46 | return; | |
| 47 | opal_poll_events(NULL); | |
| 48 | } while (len < 1); | |
| 49 | ||
| 50 | ||
| 51 | olen = cpu_to_be64(1); | |
| 52 | opal_console_write(opal_con_id, &olen, &c); | |
| 53 | } | |
| 54 | ||
| 55 | static void opal_con_close(void) | |
| 56 | { | |
| 57 | opal_console_flush(opal_con_id); | |
| 58 | } | |
| 59 | ||
| 60 | static void opal_init(void) | |
| 61 | { | |
| 62 | void *opal_node; | |
| 63 | ||
| 64 | opal_node = finddevice("/ibm,opal"); | |
| 65 | if (!opal_node) | |
| 66 | return; | |
| 67 | if (getprop(opal_node, "opal-base-address", &opal.base, sizeof(u64)) < 0) | |
| 68 | return; | |
| 69 | opal.base = be64_to_cpu(opal.base); | |
| 70 | if (getprop(opal_node, "opal-entry-address", &opal.entry, sizeof(u64)) < 0) | |
| 71 | return; | |
| 72 | opal.entry = be64_to_cpu(opal.entry); | |
| 73 | } | |
| 74 | ||
| 75 | int opal_console_init(void *devp, struct serial_console_data *scdp) | |
| 76 | { | |
| 77 | opal_init(); | |
| 78 | ||
| 79 | if (devp) { | |
| 80 | int n = getprop(devp, "reg", &opal_con_id, sizeof(u32)); | |
| 81 | if (n != sizeof(u32)) | |
| 82 | return -1; | |
| 83 | opal_con_id = be32_to_cpu(opal_con_id); | |
| 84 | } else | |
| 85 | opal_con_id = 0; | |
| 86 | ||
| 87 | scdp->open = opal_con_open; | |
| 88 | scdp->putc = opal_con_putc; | |
| 89 | scdp->close = opal_con_close; | |
| 90 | ||
| 91 | return 0; | |
| 92 | } | |
| 93 | #else | |
| 94 | int opal_console_init(void *devp, struct serial_console_data *scdp) | |
| 95 | { | |
| 96 | return -1; | |
| 97 | } | |
| 98 | #endif /* __powerpc64__ */ |