^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * 3215 line mode terminal driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright IBM Corp. 1999, 2009
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Updated:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Aug-2000: Added tab support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Dan Morrison, IBM Corporation <dmorriso@cse.buffalo.edu>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/kdev_t.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/tty.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/tty_flip.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/vt_kern.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/console.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/reboot.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/serial.h> /* ASYNC_* flags */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <asm/ccwdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <asm/cio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <asm/ebcdic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <asm/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <asm/cpcmd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <asm/setup.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include "ctrlchar.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define NR_3215 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define NR_3215_REQ (4*NR_3215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define RAW3215_BUFFER_SIZE 65536 /* output buffer size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define RAW3215_INBUF_SIZE 256 /* input buffer size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define RAW3215_MIN_SPACE 128 /* minimum free space for wakeup */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define RAW3215_MIN_WRITE 1024 /* min. length for immediate output */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define RAW3215_MAX_BYTES 3968 /* max. bytes to write with one ssch */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define RAW3215_MAX_NEWLINE 50 /* max. lines to write with one ssch */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define RAW3215_NR_CCWS 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define RAW3215_TIMEOUT HZ/10 /* time for delayed output */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define RAW3215_FIXED 1 /* 3215 console device is not be freed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define RAW3215_WORKING 4 /* set if a request is being worked on */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #define RAW3215_THROTTLED 8 /* set if reading is disabled */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define RAW3215_STOPPED 16 /* set if writing is disabled */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define RAW3215_TIMER_RUNS 64 /* set if the output delay timer is on */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define RAW3215_FLUSHING 128 /* set to flush buffer (no delay) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #define TAB_STOP_SIZE 8 /* tab stop size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * Request types for a 3215 device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) enum raw3215_type {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) RAW3215_FREE, RAW3215_READ, RAW3215_WRITE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) * Request structure for a 3215 device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) struct raw3215_req {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) enum raw3215_type type; /* type of the request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) int start, len; /* start index & len in output buffer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) int delayable; /* indication to wait for more data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) int residual; /* residual count for read request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) struct ccw1 ccws[RAW3215_NR_CCWS]; /* space for the channel program */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) struct raw3215_info *info; /* pointer to main structure */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) struct raw3215_req *next; /* pointer to next request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) } __attribute__ ((aligned(8)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) struct raw3215_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) struct tty_port port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) struct ccw_device *cdev; /* device for tty driver */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) spinlock_t *lock; /* pointer to irq lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) int flags; /* state flags */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) char *buffer; /* pointer to output buffer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) char *inbuf; /* pointer to input buffer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) int head; /* first free byte in output buffer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) int count; /* number of bytes in output buffer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) int written; /* number of bytes in write requests */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) struct raw3215_req *queued_read; /* pointer to queued read requests */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) struct raw3215_req *queued_write;/* pointer to queued write requests */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) struct tasklet_struct tlet; /* tasklet to invoke tty_wakeup */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) wait_queue_head_t empty_wait; /* wait queue for flushing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) struct timer_list timer; /* timer for delayed output */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) int line_pos; /* position on the line (for tabs) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) char ubuffer[80]; /* copy_from_user buffer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) /* array of 3215 devices structures */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) static struct raw3215_info *raw3215[NR_3215];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) /* spinlock to protect the raw3215 array */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) static DEFINE_SPINLOCK(raw3215_device_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) /* list of free request structures */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) static struct raw3215_req *raw3215_freelist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) /* spinlock to protect free list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) static spinlock_t raw3215_freelist_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) static struct tty_driver *tty3215_driver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * Get a request structure from the free list
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static inline struct raw3215_req *raw3215_alloc_req(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) struct raw3215_req *req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) spin_lock_irqsave(&raw3215_freelist_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) req = raw3215_freelist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) raw3215_freelist = req->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) spin_unlock_irqrestore(&raw3215_freelist_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) return req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) * Put a request structure back to the free list
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) static inline void raw3215_free_req(struct raw3215_req *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) if (req->type == RAW3215_FREE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) return; /* don't free a free request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) req->type = RAW3215_FREE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) spin_lock_irqsave(&raw3215_freelist_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) req->next = raw3215_freelist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) raw3215_freelist = req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) spin_unlock_irqrestore(&raw3215_freelist_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) * Set up a read request that reads up to 160 byte from the 3215 device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) * If there is a queued read request it is used, but that shouldn't happen
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) * because a 3215 terminal won't accept a new read before the old one is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) * completed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) static void raw3215_mk_read_req(struct raw3215_info *raw)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) struct raw3215_req *req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) struct ccw1 *ccw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) /* there can only be ONE read request at a time */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) req = raw->queued_read;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) if (req == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) /* no queued read request, use new req structure */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) req = raw3215_alloc_req();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) req->type = RAW3215_READ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) req->info = raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) raw->queued_read = req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) ccw = req->ccws;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) ccw->cmd_code = 0x0A; /* read inquiry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) ccw->flags = 0x20; /* ignore incorrect length */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) ccw->count = 160;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) ccw->cda = (__u32) __pa(raw->inbuf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) * Set up a write request with the information from the main structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) * A ccw chain is created that writes as much as possible from the output
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) * buffer to the 3215 device. If a queued write exists it is replaced by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) * the new, probably lengthened request.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) static void raw3215_mk_write_req(struct raw3215_info *raw)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) struct raw3215_req *req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) struct ccw1 *ccw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) int len, count, ix, lines;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) if (raw->count <= raw->written)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) /* check if there is a queued write request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) req = raw->queued_write;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) if (req == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) /* no queued write request, use new req structure */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) req = raw3215_alloc_req();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) req->type = RAW3215_WRITE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) req->info = raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) raw->queued_write = req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) raw->written -= req->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) ccw = req->ccws;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) req->start = (raw->head - raw->count + raw->written) &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) (RAW3215_BUFFER_SIZE - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) * now we have to count newlines. We can at max accept
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) * RAW3215_MAX_NEWLINE newlines in a single ssch due to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) * a restriction in VM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) lines = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) ix = req->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) while (lines < RAW3215_MAX_NEWLINE && ix != raw->head) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) if (raw->buffer[ix] == 0x15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) lines++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) ix = (ix + 1) & (RAW3215_BUFFER_SIZE - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) len = ((ix - 1 - req->start) & (RAW3215_BUFFER_SIZE - 1)) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) if (len > RAW3215_MAX_BYTES)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) len = RAW3215_MAX_BYTES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) req->len = len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) raw->written += len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) /* set the indication if we should try to enlarge this request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) req->delayable = (ix == raw->head) && (len < RAW3215_MIN_WRITE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) ix = req->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) while (len > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) if (ccw > req->ccws)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) ccw[-1].flags |= 0x40; /* use command chaining */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) ccw->cmd_code = 0x01; /* write, auto carrier return */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) ccw->flags = 0x20; /* ignore incorrect length ind. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) ccw->cda =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) (__u32) __pa(raw->buffer + ix);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) count = len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) if (ix + count > RAW3215_BUFFER_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) count = RAW3215_BUFFER_SIZE - ix;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) ccw->count = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) len -= count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) ix = (ix + count) & (RAW3215_BUFFER_SIZE - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) ccw++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) * Add a NOP to the channel program. 3215 devices are purely
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) * emulated and its much better to avoid the channel end
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) * interrupt in this case.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) if (ccw > req->ccws)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) ccw[-1].flags |= 0x40; /* use command chaining */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) ccw->cmd_code = 0x03; /* NOP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) ccw->flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) ccw->cda = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) ccw->count = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) * Start a read or a write request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) static void raw3215_start_io(struct raw3215_info *raw)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) struct raw3215_req *req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) req = raw->queued_read;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) if (req != NULL &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) !(raw->flags & (RAW3215_WORKING | RAW3215_THROTTLED))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) /* dequeue request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) raw->queued_read = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) res = ccw_device_start(raw->cdev, req->ccws,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) (unsigned long) req, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) if (res != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) /* do_IO failed, put request back to queue */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) raw->queued_read = req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) raw->flags |= RAW3215_WORKING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) req = raw->queued_write;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) if (req != NULL &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) !(raw->flags & (RAW3215_WORKING | RAW3215_STOPPED))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) /* dequeue request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) raw->queued_write = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) res = ccw_device_start(raw->cdev, req->ccws,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) (unsigned long) req, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) if (res != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) /* do_IO failed, put request back to queue */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) raw->queued_write = req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) raw->flags |= RAW3215_WORKING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) * Function to start a delayed output after RAW3215_TIMEOUT seconds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) static void raw3215_timeout(struct timer_list *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) struct raw3215_info *raw = from_timer(raw, t, timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) raw->flags &= ~RAW3215_TIMER_RUNS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) if (!tty_port_suspended(&raw->port)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) raw3215_mk_write_req(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) raw3215_start_io(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) if ((raw->queued_read || raw->queued_write) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) !(raw->flags & RAW3215_WORKING) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) !(raw->flags & RAW3215_TIMER_RUNS)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) raw->timer.expires = RAW3215_TIMEOUT + jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) add_timer(&raw->timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) raw->flags |= RAW3215_TIMER_RUNS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) * Function to conditionally start an IO. A read is started immediately,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) * a write is only started immediately if the flush flag is on or the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) * amount of data is bigger than RAW3215_MIN_WRITE. If a write is not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) * done immediately a timer is started with a delay of RAW3215_TIMEOUT.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) static inline void raw3215_try_io(struct raw3215_info *raw)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) if (!tty_port_initialized(&raw->port) || tty_port_suspended(&raw->port))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) if (raw->queued_read != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) raw3215_start_io(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) else if (raw->queued_write != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) if ((raw->queued_write->delayable == 0) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) (raw->flags & RAW3215_FLUSHING)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) /* execute write requests bigger than minimum size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) raw3215_start_io(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) if ((raw->queued_read || raw->queued_write) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) !(raw->flags & RAW3215_WORKING) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) !(raw->flags & RAW3215_TIMER_RUNS)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) raw->timer.expires = RAW3215_TIMEOUT + jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) add_timer(&raw->timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) raw->flags |= RAW3215_TIMER_RUNS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) * Call tty_wakeup from tasklet context
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) static void raw3215_wakeup(unsigned long data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) struct raw3215_info *raw = (struct raw3215_info *) data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) struct tty_struct *tty;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) tty = tty_port_tty_get(&raw->port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) if (tty) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) tty_wakeup(tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) tty_kref_put(tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) * Try to start the next IO and wake up processes waiting on the tty.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) static void raw3215_next_io(struct raw3215_info *raw, struct tty_struct *tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) raw3215_mk_write_req(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) raw3215_try_io(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) if (tty && RAW3215_BUFFER_SIZE - raw->count >= RAW3215_MIN_SPACE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) tasklet_schedule(&raw->tlet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) * Interrupt routine, called from common io layer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) static void raw3215_irq(struct ccw_device *cdev, unsigned long intparm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) struct irb *irb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) struct raw3215_info *raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) struct raw3215_req *req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) struct tty_struct *tty;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) int cstat, dstat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) int count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) raw = dev_get_drvdata(&cdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) req = (struct raw3215_req *) intparm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) tty = tty_port_tty_get(&raw->port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) cstat = irb->scsw.cmd.cstat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) dstat = irb->scsw.cmd.dstat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) if (cstat != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) raw3215_next_io(raw, tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) if (dstat & 0x01) { /* we got a unit exception */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) dstat &= ~0x01; /* we can ignore it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) switch (dstat) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) case 0x80:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) if (cstat != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) /* Attention interrupt, someone hit the enter key */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) raw3215_mk_read_req(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) raw3215_next_io(raw, tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) case 0x08:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) case 0x0C:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) /* Channel end interrupt. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) if ((raw = req->info) == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) goto put_tty; /* That shouldn't happen ... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) if (req->type == RAW3215_READ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) /* store residual count, then wait for device end */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) req->residual = irb->scsw.cmd.count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) if (dstat == 0x08)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) case 0x04:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) /* Device end interrupt. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) if ((raw = req->info) == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) goto put_tty; /* That shouldn't happen ... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) if (req->type == RAW3215_READ && tty != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) unsigned int cchar;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) count = 160 - req->residual;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) EBCASC(raw->inbuf, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) cchar = ctrlchar_handle(raw->inbuf, count, tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) switch (cchar & CTRLCHAR_MASK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) case CTRLCHAR_SYSRQ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) case CTRLCHAR_CTRL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) tty_insert_flip_char(&raw->port, cchar,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) TTY_NORMAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) tty_flip_buffer_push(&raw->port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) case CTRLCHAR_NONE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) if (count < 2 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) (strncmp(raw->inbuf+count-2, "\252n", 2) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) strncmp(raw->inbuf+count-2, "^n", 2)) ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) /* add the auto \n */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) raw->inbuf[count] = '\n';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) count -= 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) tty_insert_flip_string(&raw->port, raw->inbuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) tty_flip_buffer_push(&raw->port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) } else if (req->type == RAW3215_WRITE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) raw->count -= req->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) raw->written -= req->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) raw->flags &= ~RAW3215_WORKING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) raw3215_free_req(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) /* check for empty wait */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) if (waitqueue_active(&raw->empty_wait) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) raw->queued_write == NULL &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) raw->queued_read == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) wake_up_interruptible(&raw->empty_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) raw3215_next_io(raw, tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) /* Strange interrupt, I'll do my best to clean up */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) if (req != NULL && req->type != RAW3215_FREE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) if (req->type == RAW3215_WRITE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) raw->count -= req->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) raw->written -= req->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) raw->flags &= ~RAW3215_WORKING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) raw3215_free_req(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) raw3215_next_io(raw, tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) put_tty:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) tty_kref_put(tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) * Drop the oldest line from the output buffer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) static void raw3215_drop_line(struct raw3215_info *raw)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) int ix;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) char ch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) BUG_ON(raw->written != 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) ix = (raw->head - raw->count) & (RAW3215_BUFFER_SIZE - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) while (raw->count > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) ch = raw->buffer[ix];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) ix = (ix + 1) & (RAW3215_BUFFER_SIZE - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) raw->count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) if (ch == 0x15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) raw->head = ix;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) * Wait until length bytes are available int the output buffer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) * Has to be called with the s390irq lock held. Can be called
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) * disabled.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) static void raw3215_make_room(struct raw3215_info *raw, unsigned int length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) while (RAW3215_BUFFER_SIZE - raw->count < length) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) /* While console is frozen for suspend we have no other
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) * choice but to drop message from the buffer to make
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) * room for even more messages. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) if (tty_port_suspended(&raw->port)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) raw3215_drop_line(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) /* there might be a request pending */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) raw->flags |= RAW3215_FLUSHING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) raw3215_mk_write_req(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) raw3215_try_io(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) raw->flags &= ~RAW3215_FLUSHING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) #ifdef CONFIG_TN3215_CONSOLE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) ccw_device_wait_idle(raw->cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) /* Enough room freed up ? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) if (RAW3215_BUFFER_SIZE - raw->count >= length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) /* there might be another cpu waiting for the lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) spin_unlock(get_ccwdev_lock(raw->cdev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) udelay(100);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) spin_lock(get_ccwdev_lock(raw->cdev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) * String write routine for 3215 devices
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) static void raw3215_write(struct raw3215_info *raw, const char *str,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) unsigned int length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) int c, count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) while (length > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) count = (length > RAW3215_BUFFER_SIZE) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) RAW3215_BUFFER_SIZE : length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) length -= count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) raw3215_make_room(raw, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) /* copy string to output buffer and convert it to EBCDIC */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) while (1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) c = min_t(int, count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) min(RAW3215_BUFFER_SIZE - raw->count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) RAW3215_BUFFER_SIZE - raw->head));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) if (c <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) memcpy(raw->buffer + raw->head, str, c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) ASCEBC(raw->buffer + raw->head, c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) raw->head = (raw->head + c) & (RAW3215_BUFFER_SIZE - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) raw->count += c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) raw->line_pos += c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) str += c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) count -= c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) if (!(raw->flags & RAW3215_WORKING)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) raw3215_mk_write_req(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) /* start or queue request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) raw3215_try_io(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) * Put character routine for 3215 devices
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) static void raw3215_putchar(struct raw3215_info *raw, unsigned char ch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) unsigned int length, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) if (ch == '\t') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) length = TAB_STOP_SIZE - (raw->line_pos%TAB_STOP_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) raw->line_pos += length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) ch = ' ';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) } else if (ch == '\n') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) length = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) raw->line_pos = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) length = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) raw->line_pos++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) raw3215_make_room(raw, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) for (i = 0; i < length; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) raw->buffer[raw->head] = (char) _ascebc[(int) ch];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) raw->head = (raw->head + 1) & (RAW3215_BUFFER_SIZE - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) raw->count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) if (!(raw->flags & RAW3215_WORKING)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) raw3215_mk_write_req(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) /* start or queue request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) raw3215_try_io(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) * Flush routine, it simply sets the flush flag and tries to start
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) * pending IO.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) static void raw3215_flush_buffer(struct raw3215_info *raw)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) if (raw->count > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) raw->flags |= RAW3215_FLUSHING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) raw3215_try_io(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) raw->flags &= ~RAW3215_FLUSHING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) * Fire up a 3215 device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) static int raw3215_startup(struct raw3215_info *raw)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) if (tty_port_initialized(&raw->port))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) raw->line_pos = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) tty_port_set_initialized(&raw->port, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) raw3215_try_io(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) * Shutdown a 3215 device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) static void raw3215_shutdown(struct raw3215_info *raw)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) DECLARE_WAITQUEUE(wait, current);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) if (!tty_port_initialized(&raw->port) || (raw->flags & RAW3215_FIXED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) /* Wait for outstanding requests, then free irq */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) if ((raw->flags & RAW3215_WORKING) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) raw->queued_write != NULL ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) raw->queued_read != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) add_wait_queue(&raw->empty_wait, &wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) set_current_state(TASK_INTERRUPTIBLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) schedule();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) remove_wait_queue(&raw->empty_wait, &wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) set_current_state(TASK_RUNNING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) tty_port_set_initialized(&raw->port, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) static struct raw3215_info *raw3215_alloc_info(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) struct raw3215_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) info = kzalloc(sizeof(struct raw3215_info), GFP_KERNEL | GFP_DMA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) if (!info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) info->buffer = kzalloc(RAW3215_BUFFER_SIZE, GFP_KERNEL | GFP_DMA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) info->inbuf = kzalloc(RAW3215_INBUF_SIZE, GFP_KERNEL | GFP_DMA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) if (!info->buffer || !info->inbuf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) kfree(info->inbuf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) kfree(info->buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) kfree(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) timer_setup(&info->timer, raw3215_timeout, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) init_waitqueue_head(&info->empty_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) tasklet_init(&info->tlet, raw3215_wakeup, (unsigned long)info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) tty_port_init(&info->port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) return info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) static void raw3215_free_info(struct raw3215_info *raw)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) kfree(raw->inbuf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) kfree(raw->buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) tty_port_destroy(&raw->port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) kfree(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) static int raw3215_probe (struct ccw_device *cdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) struct raw3215_info *raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) int line;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) /* Console is special. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) if (raw3215[0] && (raw3215[0] == dev_get_drvdata(&cdev->dev)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) raw = raw3215_alloc_info();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) if (raw == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) raw->cdev = cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) dev_set_drvdata(&cdev->dev, raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) cdev->handler = raw3215_irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) spin_lock(&raw3215_device_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) for (line = 0; line < NR_3215; line++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) if (!raw3215[line]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) raw3215[line] = raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) spin_unlock(&raw3215_device_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) if (line == NR_3215) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) raw3215_free_info(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) static void raw3215_remove (struct ccw_device *cdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) struct raw3215_info *raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) unsigned int line;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) ccw_device_set_offline(cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) raw = dev_get_drvdata(&cdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) if (raw) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) spin_lock(&raw3215_device_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) for (line = 0; line < NR_3215; line++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) if (raw3215[line] == raw)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) raw3215[line] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) spin_unlock(&raw3215_device_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) dev_set_drvdata(&cdev->dev, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) raw3215_free_info(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) static int raw3215_set_online (struct ccw_device *cdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) struct raw3215_info *raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) raw = dev_get_drvdata(&cdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) if (!raw)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) return raw3215_startup(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) static int raw3215_set_offline (struct ccw_device *cdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) struct raw3215_info *raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) raw = dev_get_drvdata(&cdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) if (!raw)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) raw3215_shutdown(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) static int raw3215_pm_stop(struct ccw_device *cdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) struct raw3215_info *raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) /* Empty the output buffer, then prevent new I/O. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) raw = dev_get_drvdata(&cdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) raw3215_make_room(raw, RAW3215_BUFFER_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) tty_port_set_suspended(&raw->port, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) static int raw3215_pm_start(struct ccw_device *cdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) struct raw3215_info *raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) /* Allow I/O again and flush output buffer. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) raw = dev_get_drvdata(&cdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) tty_port_set_suspended(&raw->port, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) raw->flags |= RAW3215_FLUSHING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) raw3215_try_io(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) raw->flags &= ~RAW3215_FLUSHING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) static struct ccw_device_id raw3215_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) { CCW_DEVICE(0x3215, 0) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) { /* end of list */ },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) static struct ccw_driver raw3215_ccw_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) .name = "3215",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) .ids = raw3215_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) .probe = &raw3215_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) .remove = &raw3215_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) .set_online = &raw3215_set_online,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) .set_offline = &raw3215_set_offline,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) .freeze = &raw3215_pm_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) .thaw = &raw3215_pm_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) .restore = &raw3215_pm_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) .int_class = IRQIO_C15,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) #ifdef CONFIG_TN3215_CONSOLE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) * Write a string to the 3215 console
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) static void con3215_write(struct console *co, const char *str,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) unsigned int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) struct raw3215_info *raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) if (count <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) raw = raw3215[0]; /* console 3215 is the first one */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) while (count > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) for (i = 0; i < count; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) if (str[i] == '\t' || str[i] == '\n')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) raw3215_write(raw, str, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) count -= i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) str += i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) if (count > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) raw3215_putchar(raw, *str);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) str++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) static struct tty_driver *con3215_device(struct console *c, int *index)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) *index = c->index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) return tty3215_driver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) * panic() calls con3215_flush through a panic_notifier
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) * before the system enters a disabled, endless loop.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) static void con3215_flush(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) struct raw3215_info *raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) raw = raw3215[0]; /* console 3215 is the first one */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) if (tty_port_suspended(&raw->port))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) /* The console is still frozen for suspend. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) if (ccw_device_force_console(raw->cdev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) /* Forcing didn't work, no panic message .. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) raw3215_make_room(raw, RAW3215_BUFFER_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) static int con3215_notify(struct notifier_block *self,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) unsigned long event, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) con3215_flush();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) return NOTIFY_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) static struct notifier_block on_panic_nb = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) .notifier_call = con3215_notify,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) .priority = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) static struct notifier_block on_reboot_nb = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) .notifier_call = con3215_notify,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) .priority = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) * The console structure for the 3215 console
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) static struct console con3215 = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) .name = "ttyS",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) .write = con3215_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) .device = con3215_device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) .flags = CON_PRINTBUFFER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) * 3215 console initialization code called from console_init().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) static int __init con3215_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) struct ccw_device *cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) struct raw3215_info *raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) struct raw3215_req *req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) /* Check if 3215 is to be the console */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) if (!CONSOLE_IS_3215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) /* Set the console mode for VM */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) if (MACHINE_IS_VM) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) cpcmd("TERM CONMODE 3215", NULL, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) cpcmd("TERM AUTOCR OFF", NULL, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) /* allocate 3215 request structures */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) raw3215_freelist = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) spin_lock_init(&raw3215_freelist_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) for (i = 0; i < NR_3215_REQ; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) req = kzalloc(sizeof(struct raw3215_req), GFP_KERNEL | GFP_DMA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) if (!req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) req->next = raw3215_freelist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) raw3215_freelist = req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) cdev = ccw_device_create_console(&raw3215_ccw_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) if (IS_ERR(cdev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) raw3215[0] = raw = raw3215_alloc_info();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) raw->cdev = cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) dev_set_drvdata(&cdev->dev, raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) cdev->handler = raw3215_irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) raw->flags |= RAW3215_FIXED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) if (ccw_device_enable_console(cdev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) ccw_device_destroy_console(cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) raw3215_free_info(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) raw3215[0] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) /* Request the console irq */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) if (raw3215_startup(raw) != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) raw3215_free_info(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) raw3215[0] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) register_reboot_notifier(&on_reboot_nb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) register_console(&con3215);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) console_initcall(con3215_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) static int tty3215_install(struct tty_driver *driver, struct tty_struct *tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) struct raw3215_info *raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) raw = raw3215[tty->index];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) if (raw == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) tty->driver_data = raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) return tty_port_install(&raw->port, driver, tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) * tty3215_open
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) * This routine is called whenever a 3215 tty is opened.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) static int tty3215_open(struct tty_struct *tty, struct file * filp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) struct raw3215_info *raw = tty->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) tty_port_tty_set(&raw->port, tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) raw->port.low_latency = 0; /* don't use bottom half for pushing chars */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) * Start up 3215 device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) return raw3215_startup(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) * tty3215_close()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) * This routine is called when the 3215 tty is closed. We wait
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) * for the remaining request to be completed. Then we clean up.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) static void tty3215_close(struct tty_struct *tty, struct file * filp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) struct raw3215_info *raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) raw = (struct raw3215_info *) tty->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) if (raw == NULL || tty->count > 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) tty->closing = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) /* Shutdown the terminal */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) raw3215_shutdown(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) tasklet_kill(&raw->tlet);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) tty->closing = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) tty_port_tty_set(&raw->port, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) * Returns the amount of free space in the output buffer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) static int tty3215_write_room(struct tty_struct *tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) struct raw3215_info *raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) raw = (struct raw3215_info *) tty->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) /* Subtract TAB_STOP_SIZE to allow for a tab, 8 <<< 64K */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) if ((RAW3215_BUFFER_SIZE - raw->count - TAB_STOP_SIZE) >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) return RAW3215_BUFFER_SIZE - raw->count - TAB_STOP_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) * String write routine for 3215 ttys
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) static int tty3215_write(struct tty_struct * tty,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) const unsigned char *buf, int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) struct raw3215_info *raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) int i, written;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) if (!tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) raw = (struct raw3215_info *) tty->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) written = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) while (count > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) for (i = 0; i < count; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) if (buf[i] == '\t' || buf[i] == '\n')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) raw3215_write(raw, buf, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) count -= i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) buf += i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) if (count > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) raw3215_putchar(raw, *buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) buf++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) return written;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) * Put character routine for 3215 ttys
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) static int tty3215_put_char(struct tty_struct *tty, unsigned char ch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) struct raw3215_info *raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) if (!tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) raw = (struct raw3215_info *) tty->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) raw3215_putchar(raw, ch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) static void tty3215_flush_chars(struct tty_struct *tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) * Returns the number of characters in the output buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) static int tty3215_chars_in_buffer(struct tty_struct *tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) struct raw3215_info *raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) raw = (struct raw3215_info *) tty->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) return raw->count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) static void tty3215_flush_buffer(struct tty_struct *tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) struct raw3215_info *raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) raw = (struct raw3215_info *) tty->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) raw3215_flush_buffer(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) tty_wakeup(tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) * Disable reading from a 3215 tty
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) static void tty3215_throttle(struct tty_struct * tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) struct raw3215_info *raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) raw = (struct raw3215_info *) tty->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) raw->flags |= RAW3215_THROTTLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) * Enable reading from a 3215 tty
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) static void tty3215_unthrottle(struct tty_struct * tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) struct raw3215_info *raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) raw = (struct raw3215_info *) tty->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) if (raw->flags & RAW3215_THROTTLED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) raw->flags &= ~RAW3215_THROTTLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) raw3215_try_io(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) * Disable writing to a 3215 tty
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) static void tty3215_stop(struct tty_struct *tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) struct raw3215_info *raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) raw = (struct raw3215_info *) tty->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) raw->flags |= RAW3215_STOPPED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) * Enable writing to a 3215 tty
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) static void tty3215_start(struct tty_struct *tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) struct raw3215_info *raw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) raw = (struct raw3215_info *) tty->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) if (raw->flags & RAW3215_STOPPED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) raw->flags &= ~RAW3215_STOPPED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) raw3215_try_io(raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) static const struct tty_operations tty3215_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) .install = tty3215_install,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) .open = tty3215_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) .close = tty3215_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) .write = tty3215_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) .put_char = tty3215_put_char,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) .flush_chars = tty3215_flush_chars,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) .write_room = tty3215_write_room,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) .chars_in_buffer = tty3215_chars_in_buffer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) .flush_buffer = tty3215_flush_buffer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) .throttle = tty3215_throttle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) .unthrottle = tty3215_unthrottle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) .stop = tty3215_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) .start = tty3215_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) * 3215 tty registration code called from tty_init().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) * Most kernel services (incl. kmalloc) are available at this poimt.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) static int __init tty3215_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) struct tty_driver *driver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) if (!CONSOLE_IS_3215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) driver = alloc_tty_driver(NR_3215);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) if (!driver)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) ret = ccw_driver_register(&raw3215_ccw_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) put_tty_driver(driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) * Initialize the tty_driver structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) * Entries in tty3215_driver that are NOT initialized:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) * proc_entry, set_termios, flush_buffer, set_ldisc, write_proc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) driver->driver_name = "tty3215";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) driver->name = "ttyS";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) driver->major = TTY_MAJOR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) driver->minor_start = 64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) driver->type = TTY_DRIVER_TYPE_SYSTEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) driver->subtype = SYSTEM_TYPE_TTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) driver->init_termios = tty_std_termios;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) driver->init_termios.c_iflag = IGNBRK | IGNPAR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) driver->init_termios.c_oflag = ONLCR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) driver->init_termios.c_lflag = ISIG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) driver->flags = TTY_DRIVER_REAL_RAW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) tty_set_operations(driver, &tty3215_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) ret = tty_register_driver(driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) put_tty_driver(driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) tty3215_driver = driver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) device_initcall(tty3215_init);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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