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e3b3d0f5 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* sunsab.c: ASYNC Driver for the SIEMENS SAB82532 DUSCC. |
3 | * | |
4 | * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be) | |
c4d37215 | 5 | * Copyright (C) 2002, 2006 David S. Miller (davem@davemloft.net) |
1da177e4 LT |
6 | * |
7 | * Rewrote buffer handling to use CIRC(Circular Buffer) macros. | |
8 | * Maxim Krasnyanskiy <maxk@qualcomm.com> | |
9 | * | |
10 | * Fixed to use tty_get_baud_rate, and to allow for arbitrary baud | |
11 | * rates to be programmed into the UART. Also eliminated a lot of | |
12 | * duplicated code in the console setup. | |
13 | * Theodore Ts'o <tytso@mit.edu>, 2001-Oct-12 | |
14 | * | |
15 | * Ported to new 2.5.x UART layer. | |
c4d37215 | 16 | * David S. Miller <davem@davemloft.net> |
1da177e4 LT |
17 | */ |
18 | ||
1da177e4 LT |
19 | #include <linux/module.h> |
20 | #include <linux/kernel.h> | |
1da177e4 LT |
21 | #include <linux/errno.h> |
22 | #include <linux/tty.h> | |
23 | #include <linux/tty_flip.h> | |
24 | #include <linux/major.h> | |
25 | #include <linux/string.h> | |
26 | #include <linux/ptrace.h> | |
27 | #include <linux/ioport.h> | |
28 | #include <linux/circ_buf.h> | |
29 | #include <linux/serial.h> | |
30 | #include <linux/sysrq.h> | |
31 | #include <linux/console.h> | |
32 | #include <linux/spinlock.h> | |
33 | #include <linux/slab.h> | |
34 | #include <linux/delay.h> | |
35 | #include <linux/init.h> | |
c6ed413d | 36 | #include <linux/of_device.h> |
1da177e4 LT |
37 | |
38 | #include <asm/io.h> | |
39 | #include <asm/irq.h> | |
c4d37215 | 40 | #include <asm/prom.h> |
d550bbd4 | 41 | #include <asm/setup.h> |
1da177e4 | 42 | |
744551cc | 43 | #if defined(CONFIG_SERIAL_SUNSAB_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) |
1da177e4 LT |
44 | #define SUPPORT_SYSRQ |
45 | #endif | |
46 | ||
47 | #include <linux/serial_core.h> | |
6816383a | 48 | #include <linux/sunserialcore.h> |
1da177e4 | 49 | |
1da177e4 LT |
50 | #include "sunsab.h" |
51 | ||
52 | struct uart_sunsab_port { | |
53 | struct uart_port port; /* Generic UART port */ | |
54 | union sab82532_async_regs __iomem *regs; /* Chip registers */ | |
55 | unsigned long irqflags; /* IRQ state flags */ | |
56 | int dsr; /* Current DSR state */ | |
57 | unsigned int cec_timeout; /* Chip poll timeout... */ | |
58 | unsigned int tec_timeout; /* likewise */ | |
59 | unsigned char interrupt_mask0;/* ISR0 masking */ | |
60 | unsigned char interrupt_mask1;/* ISR1 masking */ | |
61 | unsigned char pvr_dtr_bit; /* Which PVR bit is DTR */ | |
62 | unsigned char pvr_dsr_bit; /* Which PVR bit is DSR */ | |
9c5b3480 | 63 | unsigned int gis_shift; |
1da177e4 | 64 | int type; /* SAB82532 version */ |
e4fdee8e DM |
65 | |
66 | /* Setting configuration bits while the transmitter is active | |
67 | * can cause garbage characters to get emitted by the chip. | |
68 | * Therefore, we cache such writes here and do the real register | |
69 | * write the next time the transmitter becomes idle. | |
70 | */ | |
71 | unsigned int cached_ebrg; | |
72 | unsigned char cached_mode; | |
73 | unsigned char cached_pvr; | |
74 | unsigned char cached_dafo; | |
1da177e4 LT |
75 | }; |
76 | ||
77 | /* | |
78 | * This assumes you have a 29.4912 MHz clock for your UART. | |
79 | */ | |
80 | #define SAB_BASE_BAUD ( 29491200 / 16 ) | |
81 | ||
82 | static char *sab82532_version[16] = { | |
83 | "V1.0", "V2.0", "V3.2", "V(0x03)", | |
84 | "V(0x04)", "V(0x05)", "V(0x06)", "V(0x07)", | |
85 | "V(0x08)", "V(0x09)", "V(0x0a)", "V(0x0b)", | |
86 | "V(0x0c)", "V(0x0d)", "V(0x0e)", "V(0x0f)" | |
87 | }; | |
88 | ||
89 | #define SAB82532_MAX_TEC_TIMEOUT 200000 /* 1 character time (at 50 baud) */ | |
90 | #define SAB82532_MAX_CEC_TIMEOUT 50000 /* 2.5 TX CLKs (at 50 baud) */ | |
91 | ||
92 | #define SAB82532_RECV_FIFO_SIZE 32 /* Standard async fifo sizes */ | |
93 | #define SAB82532_XMIT_FIFO_SIZE 32 | |
94 | ||
95 | static __inline__ void sunsab_tec_wait(struct uart_sunsab_port *up) | |
96 | { | |
97 | int timeout = up->tec_timeout; | |
98 | ||
99 | while ((readb(&up->regs->r.star) & SAB82532_STAR_TEC) && --timeout) | |
100 | udelay(1); | |
101 | } | |
102 | ||
103 | static __inline__ void sunsab_cec_wait(struct uart_sunsab_port *up) | |
104 | { | |
105 | int timeout = up->cec_timeout; | |
106 | ||
107 | while ((readb(&up->regs->r.star) & SAB82532_STAR_CEC) && --timeout) | |
108 | udelay(1); | |
109 | } | |
110 | ||
2e124b4a | 111 | static struct tty_port * |
1da177e4 | 112 | receive_chars(struct uart_sunsab_port *up, |
7d12e780 | 113 | union sab82532_irq_status *stat) |
1da177e4 | 114 | { |
92a19f9c | 115 | struct tty_port *port = NULL; |
1da177e4 LT |
116 | unsigned char buf[32]; |
117 | int saw_console_brk = 0; | |
118 | int free_fifo = 0; | |
119 | int count = 0; | |
120 | int i; | |
121 | ||
2e124b4a | 122 | if (up->port.state != NULL) /* Unopened serial console */ |
92a19f9c | 123 | port = &up->port.state->port; |
1da177e4 LT |
124 | |
125 | /* Read number of BYTES (Character + Status) available. */ | |
126 | if (stat->sreg.isr0 & SAB82532_ISR0_RPF) { | |
127 | count = SAB82532_RECV_FIFO_SIZE; | |
128 | free_fifo++; | |
129 | } | |
130 | ||
131 | if (stat->sreg.isr0 & SAB82532_ISR0_TCD) { | |
132 | count = readb(&up->regs->r.rbcl) & (SAB82532_RECV_FIFO_SIZE - 1); | |
133 | free_fifo++; | |
134 | } | |
135 | ||
136 | /* Issue a FIFO read command in case we where idle. */ | |
137 | if (stat->sreg.isr0 & SAB82532_ISR0_TIME) { | |
138 | sunsab_cec_wait(up); | |
139 | writeb(SAB82532_CMDR_RFRD, &up->regs->w.cmdr); | |
2e124b4a | 140 | return port; |
1da177e4 LT |
141 | } |
142 | ||
143 | if (stat->sreg.isr0 & SAB82532_ISR0_RFO) | |
144 | free_fifo++; | |
145 | ||
146 | /* Read the FIFO. */ | |
147 | for (i = 0; i < count; i++) | |
148 | buf[i] = readb(&up->regs->r.rfifo[i]); | |
149 | ||
150 | /* Issue Receive Message Complete command. */ | |
151 | if (free_fifo) { | |
152 | sunsab_cec_wait(up); | |
153 | writeb(SAB82532_CMDR_RMC, &up->regs->w.cmdr); | |
154 | } | |
155 | ||
156 | /* Count may be zero for BRK, so we check for it here */ | |
157 | if ((stat->sreg.isr1 & SAB82532_ISR1_BRK) && | |
158 | (up->port.line == up->port.cons->index)) | |
159 | saw_console_brk = 1; | |
160 | ||
fe418231 CATS |
161 | if (count == 0) { |
162 | if (unlikely(stat->sreg.isr1 & SAB82532_ISR1_BRK)) { | |
163 | stat->sreg.isr0 &= ~(SAB82532_ISR0_PERR | | |
164 | SAB82532_ISR0_FERR); | |
165 | up->port.icount.brk++; | |
166 | uart_handle_break(&up->port); | |
167 | } | |
168 | } | |
169 | ||
1da177e4 | 170 | for (i = 0; i < count; i++) { |
33f0f88f | 171 | unsigned char ch = buf[i], flag; |
1da177e4 | 172 | |
33f0f88f | 173 | flag = TTY_NORMAL; |
1da177e4 LT |
174 | up->port.icount.rx++; |
175 | ||
176 | if (unlikely(stat->sreg.isr0 & (SAB82532_ISR0_PERR | | |
177 | SAB82532_ISR0_FERR | | |
178 | SAB82532_ISR0_RFO)) || | |
179 | unlikely(stat->sreg.isr1 & SAB82532_ISR1_BRK)) { | |
180 | /* | |
181 | * For statistics only | |
182 | */ | |
183 | if (stat->sreg.isr1 & SAB82532_ISR1_BRK) { | |
184 | stat->sreg.isr0 &= ~(SAB82532_ISR0_PERR | | |
185 | SAB82532_ISR0_FERR); | |
186 | up->port.icount.brk++; | |
187 | /* | |
188 | * We do the SysRQ and SAK checking | |
189 | * here because otherwise the break | |
190 | * may get masked by ignore_status_mask | |
191 | * or read_status_mask. | |
192 | */ | |
193 | if (uart_handle_break(&up->port)) | |
194 | continue; | |
195 | } else if (stat->sreg.isr0 & SAB82532_ISR0_PERR) | |
196 | up->port.icount.parity++; | |
197 | else if (stat->sreg.isr0 & SAB82532_ISR0_FERR) | |
198 | up->port.icount.frame++; | |
199 | if (stat->sreg.isr0 & SAB82532_ISR0_RFO) | |
200 | up->port.icount.overrun++; | |
201 | ||
202 | /* | |
203 | * Mask off conditions which should be ingored. | |
204 | */ | |
205 | stat->sreg.isr0 &= (up->port.read_status_mask & 0xff); | |
206 | stat->sreg.isr1 &= ((up->port.read_status_mask >> 8) & 0xff); | |
207 | ||
208 | if (stat->sreg.isr1 & SAB82532_ISR1_BRK) { | |
33f0f88f | 209 | flag = TTY_BREAK; |
1da177e4 | 210 | } else if (stat->sreg.isr0 & SAB82532_ISR0_PERR) |
33f0f88f | 211 | flag = TTY_PARITY; |
1da177e4 | 212 | else if (stat->sreg.isr0 & SAB82532_ISR0_FERR) |
33f0f88f | 213 | flag = TTY_FRAME; |
1da177e4 LT |
214 | } |
215 | ||
7bbe08d6 | 216 | if (uart_handle_sysrq_char(&up->port, ch) || !port) |
1da177e4 LT |
217 | continue; |
218 | ||
219 | if ((stat->sreg.isr0 & (up->port.ignore_status_mask & 0xff)) == 0 && | |
33f0f88f | 220 | (stat->sreg.isr1 & ((up->port.ignore_status_mask >> 8) & 0xff)) == 0) |
92a19f9c | 221 | tty_insert_flip_char(port, ch, flag); |
33f0f88f | 222 | if (stat->sreg.isr0 & SAB82532_ISR0_RFO) |
92a19f9c | 223 | tty_insert_flip_char(port, 0, TTY_OVERRUN); |
1da177e4 LT |
224 | } |
225 | ||
226 | if (saw_console_brk) | |
227 | sun_do_break(); | |
228 | ||
2e124b4a | 229 | return port; |
1da177e4 LT |
230 | } |
231 | ||
b129a8cc | 232 | static void sunsab_stop_tx(struct uart_port *); |
e4fdee8e | 233 | static void sunsab_tx_idle(struct uart_sunsab_port *); |
1da177e4 LT |
234 | |
235 | static void transmit_chars(struct uart_sunsab_port *up, | |
236 | union sab82532_irq_status *stat) | |
237 | { | |
ebd2c8f6 | 238 | struct circ_buf *xmit = &up->port.state->xmit; |
1da177e4 LT |
239 | int i; |
240 | ||
241 | if (stat->sreg.isr1 & SAB82532_ISR1_ALLS) { | |
242 | up->interrupt_mask1 |= SAB82532_IMR1_ALLS; | |
243 | writeb(up->interrupt_mask1, &up->regs->w.imr1); | |
244 | set_bit(SAB82532_ALLS, &up->irqflags); | |
245 | } | |
246 | ||
247 | #if 0 /* bde@nwlink.com says this check causes problems */ | |
248 | if (!(stat->sreg.isr1 & SAB82532_ISR1_XPR)) | |
249 | return; | |
250 | #endif | |
251 | ||
252 | if (!(readb(&up->regs->r.star) & SAB82532_STAR_XFW)) | |
253 | return; | |
254 | ||
255 | set_bit(SAB82532_XPR, &up->irqflags); | |
e4fdee8e | 256 | sunsab_tx_idle(up); |
1da177e4 LT |
257 | |
258 | if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) { | |
259 | up->interrupt_mask1 |= SAB82532_IMR1_XPR; | |
260 | writeb(up->interrupt_mask1, &up->regs->w.imr1); | |
1da177e4 LT |
261 | return; |
262 | } | |
263 | ||
264 | up->interrupt_mask1 &= ~(SAB82532_IMR1_ALLS|SAB82532_IMR1_XPR); | |
265 | writeb(up->interrupt_mask1, &up->regs->w.imr1); | |
266 | clear_bit(SAB82532_ALLS, &up->irqflags); | |
267 | ||
268 | /* Stuff 32 bytes into Transmit FIFO. */ | |
269 | clear_bit(SAB82532_XPR, &up->irqflags); | |
270 | for (i = 0; i < up->port.fifosize; i++) { | |
271 | writeb(xmit->buf[xmit->tail], | |
272 | &up->regs->w.xfifo[i]); | |
273 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); | |
274 | up->port.icount.tx++; | |
275 | if (uart_circ_empty(xmit)) | |
276 | break; | |
277 | } | |
278 | ||
279 | /* Issue a Transmit Frame command. */ | |
280 | sunsab_cec_wait(up); | |
281 | writeb(SAB82532_CMDR_XF, &up->regs->w.cmdr); | |
282 | ||
283 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) | |
284 | uart_write_wakeup(&up->port); | |
285 | ||
286 | if (uart_circ_empty(xmit)) | |
b129a8cc | 287 | sunsab_stop_tx(&up->port); |
1da177e4 LT |
288 | } |
289 | ||
290 | static void check_status(struct uart_sunsab_port *up, | |
291 | union sab82532_irq_status *stat) | |
292 | { | |
293 | if (stat->sreg.isr0 & SAB82532_ISR0_CDSC) | |
294 | uart_handle_dcd_change(&up->port, | |
295 | !(readb(&up->regs->r.vstr) & SAB82532_VSTR_CD)); | |
296 | ||
297 | if (stat->sreg.isr1 & SAB82532_ISR1_CSC) | |
298 | uart_handle_cts_change(&up->port, | |
299 | (readb(&up->regs->r.star) & SAB82532_STAR_CTS)); | |
300 | ||
301 | if ((readb(&up->regs->r.pvr) & up->pvr_dsr_bit) ^ up->dsr) { | |
302 | up->dsr = (readb(&up->regs->r.pvr) & up->pvr_dsr_bit) ? 0 : 1; | |
303 | up->port.icount.dsr++; | |
304 | } | |
305 | ||
bdc04e31 | 306 | wake_up_interruptible(&up->port.state->port.delta_msr_wait); |
1da177e4 LT |
307 | } |
308 | ||
7d12e780 | 309 | static irqreturn_t sunsab_interrupt(int irq, void *dev_id) |
1da177e4 LT |
310 | { |
311 | struct uart_sunsab_port *up = dev_id; | |
2e124b4a | 312 | struct tty_port *port = NULL; |
1da177e4 LT |
313 | union sab82532_irq_status status; |
314 | unsigned long flags; | |
9c5b3480 | 315 | unsigned char gis; |
1da177e4 LT |
316 | |
317 | spin_lock_irqsave(&up->port.lock, flags); | |
318 | ||
319 | status.stat = 0; | |
9c5b3480 AV |
320 | gis = readb(&up->regs->r.gis) >> up->gis_shift; |
321 | if (gis & 1) | |
1da177e4 | 322 | status.sreg.isr0 = readb(&up->regs->r.isr0); |
9c5b3480 | 323 | if (gis & 2) |
1da177e4 LT |
324 | status.sreg.isr1 = readb(&up->regs->r.isr1); |
325 | ||
1da177e4 LT |
326 | if (status.stat) { |
327 | if ((status.sreg.isr0 & (SAB82532_ISR0_TCD | SAB82532_ISR0_TIME | | |
328 | SAB82532_ISR0_RFO | SAB82532_ISR0_RPF)) || | |
329 | (status.sreg.isr1 & SAB82532_ISR1_BRK)) | |
2e124b4a | 330 | port = receive_chars(up, &status); |
1da177e4 LT |
331 | if ((status.sreg.isr0 & SAB82532_ISR0_CDSC) || |
332 | (status.sreg.isr1 & SAB82532_ISR1_CSC)) | |
333 | check_status(up, &status); | |
334 | if (status.sreg.isr1 & (SAB82532_ISR1_ALLS | SAB82532_ISR1_XPR)) | |
335 | transmit_chars(up, &status); | |
336 | } | |
337 | ||
1da177e4 LT |
338 | spin_unlock_irqrestore(&up->port.lock, flags); |
339 | ||
2e124b4a JS |
340 | if (port) |
341 | tty_flip_buffer_push(port); | |
1da177e4 LT |
342 | |
343 | return IRQ_HANDLED; | |
344 | } | |
345 | ||
346 | /* port->lock is not held. */ | |
347 | static unsigned int sunsab_tx_empty(struct uart_port *port) | |
348 | { | |
72665765 FF |
349 | struct uart_sunsab_port *up = |
350 | container_of(port, struct uart_sunsab_port, port); | |
1da177e4 LT |
351 | int ret; |
352 | ||
353 | /* Do not need a lock for a state test like this. */ | |
354 | if (test_bit(SAB82532_ALLS, &up->irqflags)) | |
355 | ret = TIOCSER_TEMT; | |
356 | else | |
357 | ret = 0; | |
358 | ||
359 | return ret; | |
360 | } | |
361 | ||
362 | /* port->lock held by caller. */ | |
363 | static void sunsab_set_mctrl(struct uart_port *port, unsigned int mctrl) | |
364 | { | |
72665765 FF |
365 | struct uart_sunsab_port *up = |
366 | container_of(port, struct uart_sunsab_port, port); | |
1da177e4 LT |
367 | |
368 | if (mctrl & TIOCM_RTS) { | |
e4fdee8e DM |
369 | up->cached_mode &= ~SAB82532_MODE_FRTS; |
370 | up->cached_mode |= SAB82532_MODE_RTS; | |
1da177e4 | 371 | } else { |
e4fdee8e DM |
372 | up->cached_mode |= (SAB82532_MODE_FRTS | |
373 | SAB82532_MODE_RTS); | |
1da177e4 LT |
374 | } |
375 | if (mctrl & TIOCM_DTR) { | |
e4fdee8e | 376 | up->cached_pvr &= ~(up->pvr_dtr_bit); |
1da177e4 | 377 | } else { |
e4fdee8e | 378 | up->cached_pvr |= up->pvr_dtr_bit; |
1da177e4 | 379 | } |
e4fdee8e DM |
380 | |
381 | set_bit(SAB82532_REGS_PENDING, &up->irqflags); | |
382 | if (test_bit(SAB82532_XPR, &up->irqflags)) | |
383 | sunsab_tx_idle(up); | |
1da177e4 LT |
384 | } |
385 | ||
c5f4644e | 386 | /* port->lock is held by caller and interrupts are disabled. */ |
1da177e4 LT |
387 | static unsigned int sunsab_get_mctrl(struct uart_port *port) |
388 | { | |
72665765 FF |
389 | struct uart_sunsab_port *up = |
390 | container_of(port, struct uart_sunsab_port, port); | |
1da177e4 LT |
391 | unsigned char val; |
392 | unsigned int result; | |
393 | ||
394 | result = 0; | |
395 | ||
1da177e4 LT |
396 | val = readb(&up->regs->r.pvr); |
397 | result |= (val & up->pvr_dsr_bit) ? 0 : TIOCM_DSR; | |
398 | ||
399 | val = readb(&up->regs->r.vstr); | |
400 | result |= (val & SAB82532_VSTR_CD) ? 0 : TIOCM_CAR; | |
401 | ||
402 | val = readb(&up->regs->r.star); | |
403 | result |= (val & SAB82532_STAR_CTS) ? TIOCM_CTS : 0; | |
404 | ||
1da177e4 LT |
405 | return result; |
406 | } | |
407 | ||
408 | /* port->lock held by caller. */ | |
b129a8cc | 409 | static void sunsab_stop_tx(struct uart_port *port) |
1da177e4 | 410 | { |
72665765 FF |
411 | struct uart_sunsab_port *up = |
412 | container_of(port, struct uart_sunsab_port, port); | |
1da177e4 LT |
413 | |
414 | up->interrupt_mask1 |= SAB82532_IMR1_XPR; | |
415 | writeb(up->interrupt_mask1, &up->regs->w.imr1); | |
416 | } | |
417 | ||
e4fdee8e DM |
418 | /* port->lock held by caller. */ |
419 | static void sunsab_tx_idle(struct uart_sunsab_port *up) | |
420 | { | |
421 | if (test_bit(SAB82532_REGS_PENDING, &up->irqflags)) { | |
422 | u8 tmp; | |
423 | ||
424 | clear_bit(SAB82532_REGS_PENDING, &up->irqflags); | |
425 | writeb(up->cached_mode, &up->regs->rw.mode); | |
426 | writeb(up->cached_pvr, &up->regs->rw.pvr); | |
427 | writeb(up->cached_dafo, &up->regs->w.dafo); | |
428 | ||
429 | writeb(up->cached_ebrg & 0xff, &up->regs->w.bgr); | |
430 | tmp = readb(&up->regs->rw.ccr2); | |
431 | tmp &= ~0xc0; | |
432 | tmp |= (up->cached_ebrg >> 2) & 0xc0; | |
433 | writeb(tmp, &up->regs->rw.ccr2); | |
434 | } | |
435 | } | |
436 | ||
1da177e4 | 437 | /* port->lock held by caller. */ |
b129a8cc | 438 | static void sunsab_start_tx(struct uart_port *port) |
1da177e4 | 439 | { |
72665765 FF |
440 | struct uart_sunsab_port *up = |
441 | container_of(port, struct uart_sunsab_port, port); | |
ebd2c8f6 | 442 | struct circ_buf *xmit = &up->port.state->xmit; |
1da177e4 LT |
443 | int i; |
444 | ||
98f8b83d | 445 | if (uart_circ_empty(xmit) || uart_tx_stopped(port)) |
c557d392 PH |
446 | return; |
447 | ||
1da177e4 LT |
448 | up->interrupt_mask1 &= ~(SAB82532_IMR1_ALLS|SAB82532_IMR1_XPR); |
449 | writeb(up->interrupt_mask1, &up->regs->w.imr1); | |
450 | ||
451 | if (!test_bit(SAB82532_XPR, &up->irqflags)) | |
452 | return; | |
453 | ||
454 | clear_bit(SAB82532_ALLS, &up->irqflags); | |
455 | clear_bit(SAB82532_XPR, &up->irqflags); | |
456 | ||
457 | for (i = 0; i < up->port.fifosize; i++) { | |
458 | writeb(xmit->buf[xmit->tail], | |
459 | &up->regs->w.xfifo[i]); | |
460 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); | |
461 | up->port.icount.tx++; | |
462 | if (uart_circ_empty(xmit)) | |
463 | break; | |
464 | } | |
465 | ||
466 | /* Issue a Transmit Frame command. */ | |
467 | sunsab_cec_wait(up); | |
468 | writeb(SAB82532_CMDR_XF, &up->regs->w.cmdr); | |
469 | } | |
470 | ||
471 | /* port->lock is not held. */ | |
472 | static void sunsab_send_xchar(struct uart_port *port, char ch) | |
473 | { | |
72665765 FF |
474 | struct uart_sunsab_port *up = |
475 | container_of(port, struct uart_sunsab_port, port); | |
1da177e4 LT |
476 | unsigned long flags; |
477 | ||
db106df3 PH |
478 | if (ch == __DISABLED_CHAR) |
479 | return; | |
480 | ||
1da177e4 LT |
481 | spin_lock_irqsave(&up->port.lock, flags); |
482 | ||
483 | sunsab_tec_wait(up); | |
484 | writeb(ch, &up->regs->w.tic); | |
485 | ||
486 | spin_unlock_irqrestore(&up->port.lock, flags); | |
487 | } | |
488 | ||
489 | /* port->lock held by caller. */ | |
490 | static void sunsab_stop_rx(struct uart_port *port) | |
491 | { | |
72665765 FF |
492 | struct uart_sunsab_port *up = |
493 | container_of(port, struct uart_sunsab_port, port); | |
1da177e4 | 494 | |
935050da | 495 | up->interrupt_mask0 |= SAB82532_IMR0_TCD; |
1da177e4 LT |
496 | writeb(up->interrupt_mask1, &up->regs->w.imr0); |
497 | } | |
498 | ||
1da177e4 LT |
499 | /* port->lock is not held. */ |
500 | static void sunsab_break_ctl(struct uart_port *port, int break_state) | |
501 | { | |
72665765 FF |
502 | struct uart_sunsab_port *up = |
503 | container_of(port, struct uart_sunsab_port, port); | |
1da177e4 LT |
504 | unsigned long flags; |
505 | unsigned char val; | |
506 | ||
507 | spin_lock_irqsave(&up->port.lock, flags); | |
508 | ||
e4fdee8e | 509 | val = up->cached_dafo; |
1da177e4 LT |
510 | if (break_state) |
511 | val |= SAB82532_DAFO_XBRK; | |
512 | else | |
513 | val &= ~SAB82532_DAFO_XBRK; | |
e4fdee8e DM |
514 | up->cached_dafo = val; |
515 | ||
516 | set_bit(SAB82532_REGS_PENDING, &up->irqflags); | |
517 | if (test_bit(SAB82532_XPR, &up->irqflags)) | |
518 | sunsab_tx_idle(up); | |
1da177e4 LT |
519 | |
520 | spin_unlock_irqrestore(&up->port.lock, flags); | |
521 | } | |
522 | ||
523 | /* port->lock is not held. */ | |
524 | static int sunsab_startup(struct uart_port *port) | |
525 | { | |
72665765 FF |
526 | struct uart_sunsab_port *up = |
527 | container_of(port, struct uart_sunsab_port, port); | |
1da177e4 LT |
528 | unsigned long flags; |
529 | unsigned char tmp; | |
9c5b3480 AV |
530 | int err = request_irq(up->port.irq, sunsab_interrupt, |
531 | IRQF_SHARED, "sab", up); | |
532 | if (err) | |
533 | return err; | |
1da177e4 LT |
534 | |
535 | spin_lock_irqsave(&up->port.lock, flags); | |
536 | ||
537 | /* | |
538 | * Wait for any commands or immediate characters | |
539 | */ | |
540 | sunsab_cec_wait(up); | |
541 | sunsab_tec_wait(up); | |
542 | ||
543 | /* | |
544 | * Clear the FIFO buffers. | |
545 | */ | |
546 | writeb(SAB82532_CMDR_RRES, &up->regs->w.cmdr); | |
547 | sunsab_cec_wait(up); | |
548 | writeb(SAB82532_CMDR_XRES, &up->regs->w.cmdr); | |
549 | ||
550 | /* | |
551 | * Clear the interrupt registers. | |
552 | */ | |
553 | (void) readb(&up->regs->r.isr0); | |
554 | (void) readb(&up->regs->r.isr1); | |
555 | ||
556 | /* | |
557 | * Now, initialize the UART | |
558 | */ | |
559 | writeb(0, &up->regs->w.ccr0); /* power-down */ | |
560 | writeb(SAB82532_CCR0_MCE | SAB82532_CCR0_SC_NRZ | | |
561 | SAB82532_CCR0_SM_ASYNC, &up->regs->w.ccr0); | |
562 | writeb(SAB82532_CCR1_ODS | SAB82532_CCR1_BCR | 7, &up->regs->w.ccr1); | |
563 | writeb(SAB82532_CCR2_BDF | SAB82532_CCR2_SSEL | | |
564 | SAB82532_CCR2_TOE, &up->regs->w.ccr2); | |
565 | writeb(0, &up->regs->w.ccr3); | |
566 | writeb(SAB82532_CCR4_MCK4 | SAB82532_CCR4_EBRG, &up->regs->w.ccr4); | |
e4fdee8e DM |
567 | up->cached_mode = (SAB82532_MODE_RTS | SAB82532_MODE_FCTS | |
568 | SAB82532_MODE_RAC); | |
569 | writeb(up->cached_mode, &up->regs->w.mode); | |
1da177e4 LT |
570 | writeb(SAB82532_RFC_DPS|SAB82532_RFC_RFTH_32, &up->regs->w.rfc); |
571 | ||
572 | tmp = readb(&up->regs->rw.ccr0); | |
573 | tmp |= SAB82532_CCR0_PU; /* power-up */ | |
574 | writeb(tmp, &up->regs->rw.ccr0); | |
575 | ||
576 | /* | |
577 | * Finally, enable interrupts | |
578 | */ | |
579 | up->interrupt_mask0 = (SAB82532_IMR0_PERR | SAB82532_IMR0_FERR | | |
580 | SAB82532_IMR0_PLLA); | |
581 | writeb(up->interrupt_mask0, &up->regs->w.imr0); | |
582 | up->interrupt_mask1 = (SAB82532_IMR1_BRKT | SAB82532_IMR1_ALLS | | |
583 | SAB82532_IMR1_XOFF | SAB82532_IMR1_TIN | | |
584 | SAB82532_IMR1_CSC | SAB82532_IMR1_XON | | |
585 | SAB82532_IMR1_XPR); | |
586 | writeb(up->interrupt_mask1, &up->regs->w.imr1); | |
587 | set_bit(SAB82532_ALLS, &up->irqflags); | |
588 | set_bit(SAB82532_XPR, &up->irqflags); | |
589 | ||
590 | spin_unlock_irqrestore(&up->port.lock, flags); | |
591 | ||
592 | return 0; | |
593 | } | |
594 | ||
595 | /* port->lock is not held. */ | |
596 | static void sunsab_shutdown(struct uart_port *port) | |
597 | { | |
72665765 FF |
598 | struct uart_sunsab_port *up = |
599 | container_of(port, struct uart_sunsab_port, port); | |
1da177e4 | 600 | unsigned long flags; |
1da177e4 LT |
601 | |
602 | spin_lock_irqsave(&up->port.lock, flags); | |
603 | ||
604 | /* Disable Interrupts */ | |
605 | up->interrupt_mask0 = 0xff; | |
606 | writeb(up->interrupt_mask0, &up->regs->w.imr0); | |
607 | up->interrupt_mask1 = 0xff; | |
608 | writeb(up->interrupt_mask1, &up->regs->w.imr1); | |
609 | ||
610 | /* Disable break condition */ | |
e4fdee8e DM |
611 | up->cached_dafo = readb(&up->regs->rw.dafo); |
612 | up->cached_dafo &= ~SAB82532_DAFO_XBRK; | |
613 | writeb(up->cached_dafo, &up->regs->rw.dafo); | |
1da177e4 LT |
614 | |
615 | /* Disable Receiver */ | |
e4fdee8e DM |
616 | up->cached_mode &= ~SAB82532_MODE_RAC; |
617 | writeb(up->cached_mode, &up->regs->rw.mode); | |
1da177e4 LT |
618 | |
619 | /* | |
620 | * XXX FIXME | |
621 | * | |
622 | * If the chip is powered down here the system hangs/crashes during | |
623 | * reboot or shutdown. This needs to be investigated further, | |
624 | * similar behaviour occurs in 2.4 when the driver is configured | |
625 | * as a module only. One hint may be that data is sometimes | |
626 | * transmitted at 9600 baud during shutdown (regardless of the | |
627 | * speed the chip was configured for when the port was open). | |
628 | */ | |
629 | #if 0 | |
630 | /* Power Down */ | |
631 | tmp = readb(&up->regs->rw.ccr0); | |
632 | tmp &= ~SAB82532_CCR0_PU; | |
633 | writeb(tmp, &up->regs->rw.ccr0); | |
634 | #endif | |
635 | ||
636 | spin_unlock_irqrestore(&up->port.lock, flags); | |
9c5b3480 | 637 | free_irq(up->port.irq, up); |
1da177e4 LT |
638 | } |
639 | ||
640 | /* | |
641 | * This is used to figure out the divisor speeds. | |
642 | * | |
643 | * The formula is: Baud = SAB_BASE_BAUD / ((N + 1) * (1 << M)), | |
644 | * | |
645 | * with 0 <= N < 64 and 0 <= M < 16 | |
646 | */ | |
647 | ||
648 | static void calc_ebrg(int baud, int *n_ret, int *m_ret) | |
649 | { | |
650 | int n, m; | |
651 | ||
652 | if (baud == 0) { | |
653 | *n_ret = 0; | |
654 | *m_ret = 0; | |
655 | return; | |
656 | } | |
657 | ||
658 | /* | |
659 | * We scale numbers by 10 so that we get better accuracy | |
660 | * without having to use floating point. Here we increment m | |
661 | * until n is within the valid range. | |
662 | */ | |
663 | n = (SAB_BASE_BAUD * 10) / baud; | |
664 | m = 0; | |
665 | while (n >= 640) { | |
666 | n = n / 2; | |
667 | m++; | |
668 | } | |
669 | n = (n+5) / 10; | |
670 | /* | |
671 | * We try very hard to avoid speeds with M == 0 since they may | |
672 | * not work correctly for XTAL frequences above 10 MHz. | |
673 | */ | |
674 | if ((m == 0) && ((n & 1) == 0)) { | |
675 | n = n / 2; | |
676 | m++; | |
677 | } | |
678 | *n_ret = n - 1; | |
679 | *m_ret = m; | |
680 | } | |
681 | ||
682 | /* Internal routine, port->lock is held and local interrupts are disabled. */ | |
683 | static void sunsab_convert_to_sab(struct uart_sunsab_port *up, unsigned int cflag, | |
b179fb8c DM |
684 | unsigned int iflag, unsigned int baud, |
685 | unsigned int quot) | |
1da177e4 | 686 | { |
1da177e4 LT |
687 | unsigned char dafo; |
688 | int bits, n, m; | |
689 | ||
690 | /* Byte size and parity */ | |
691 | switch (cflag & CSIZE) { | |
692 | case CS5: dafo = SAB82532_DAFO_CHL5; bits = 7; break; | |
693 | case CS6: dafo = SAB82532_DAFO_CHL6; bits = 8; break; | |
694 | case CS7: dafo = SAB82532_DAFO_CHL7; bits = 9; break; | |
695 | case CS8: dafo = SAB82532_DAFO_CHL8; bits = 10; break; | |
696 | /* Never happens, but GCC is too dumb to figure it out */ | |
697 | default: dafo = SAB82532_DAFO_CHL5; bits = 7; break; | |
698 | } | |
699 | ||
700 | if (cflag & CSTOPB) { | |
701 | dafo |= SAB82532_DAFO_STOP; | |
702 | bits++; | |
703 | } | |
704 | ||
705 | if (cflag & PARENB) { | |
706 | dafo |= SAB82532_DAFO_PARE; | |
707 | bits++; | |
708 | } | |
709 | ||
710 | if (cflag & PARODD) { | |
711 | dafo |= SAB82532_DAFO_PAR_ODD; | |
712 | } else { | |
713 | dafo |= SAB82532_DAFO_PAR_EVEN; | |
714 | } | |
e4fdee8e | 715 | up->cached_dafo = dafo; |
1da177e4 LT |
716 | |
717 | calc_ebrg(baud, &n, &m); | |
718 | ||
e4fdee8e | 719 | up->cached_ebrg = n | (m << 6); |
1da177e4 LT |
720 | |
721 | up->tec_timeout = (10 * 1000000) / baud; | |
722 | up->cec_timeout = up->tec_timeout >> 2; | |
723 | ||
724 | /* CTS flow control flags */ | |
725 | /* We encode read_status_mask and ignore_status_mask like so: | |
726 | * | |
727 | * --------------------- | |
728 | * | ... | ISR1 | ISR0 | | |
729 | * --------------------- | |
730 | * .. 15 8 7 0 | |
731 | */ | |
732 | ||
733 | up->port.read_status_mask = (SAB82532_ISR0_TCD | SAB82532_ISR0_TIME | | |
734 | SAB82532_ISR0_RFO | SAB82532_ISR0_RPF | | |
735 | SAB82532_ISR0_CDSC); | |
736 | up->port.read_status_mask |= (SAB82532_ISR1_CSC | | |
737 | SAB82532_ISR1_ALLS | | |
738 | SAB82532_ISR1_XPR) << 8; | |
739 | if (iflag & INPCK) | |
740 | up->port.read_status_mask |= (SAB82532_ISR0_PERR | | |
741 | SAB82532_ISR0_FERR); | |
ef8b9ddc | 742 | if (iflag & (IGNBRK | BRKINT | PARMRK)) |
1da177e4 LT |
743 | up->port.read_status_mask |= (SAB82532_ISR1_BRK << 8); |
744 | ||
745 | /* | |
746 | * Characteres to ignore | |
747 | */ | |
748 | up->port.ignore_status_mask = 0; | |
749 | if (iflag & IGNPAR) | |
750 | up->port.ignore_status_mask |= (SAB82532_ISR0_PERR | | |
751 | SAB82532_ISR0_FERR); | |
752 | if (iflag & IGNBRK) { | |
753 | up->port.ignore_status_mask |= (SAB82532_ISR1_BRK << 8); | |
754 | /* | |
755 | * If we're ignoring parity and break indicators, | |
756 | * ignore overruns too (for real raw support). | |
757 | */ | |
758 | if (iflag & IGNPAR) | |
759 | up->port.ignore_status_mask |= SAB82532_ISR0_RFO; | |
760 | } | |
761 | ||
762 | /* | |
763 | * ignore all characters if CREAD is not set | |
764 | */ | |
765 | if ((cflag & CREAD) == 0) | |
766 | up->port.ignore_status_mask |= (SAB82532_ISR0_RPF | | |
767 | SAB82532_ISR0_TCD); | |
768 | ||
b179fb8c DM |
769 | uart_update_timeout(&up->port, cflag, |
770 | (up->port.uartclk / (16 * quot))); | |
771 | ||
e4fdee8e DM |
772 | /* Now schedule a register update when the chip's |
773 | * transmitter is idle. | |
774 | */ | |
775 | up->cached_mode |= SAB82532_MODE_RAC; | |
776 | set_bit(SAB82532_REGS_PENDING, &up->irqflags); | |
777 | if (test_bit(SAB82532_XPR, &up->irqflags)) | |
778 | sunsab_tx_idle(up); | |
1da177e4 LT |
779 | } |
780 | ||
781 | /* port->lock is not held. */ | |
606d099c AC |
782 | static void sunsab_set_termios(struct uart_port *port, struct ktermios *termios, |
783 | struct ktermios *old) | |
1da177e4 | 784 | { |
72665765 FF |
785 | struct uart_sunsab_port *up = |
786 | container_of(port, struct uart_sunsab_port, port); | |
1da177e4 | 787 | unsigned long flags; |
b179fb8c DM |
788 | unsigned int baud = uart_get_baud_rate(port, termios, old, 0, 4000000); |
789 | unsigned int quot = uart_get_divisor(port, baud); | |
1da177e4 LT |
790 | |
791 | spin_lock_irqsave(&up->port.lock, flags); | |
b179fb8c | 792 | sunsab_convert_to_sab(up, termios->c_cflag, termios->c_iflag, baud, quot); |
1da177e4 LT |
793 | spin_unlock_irqrestore(&up->port.lock, flags); |
794 | } | |
795 | ||
796 | static const char *sunsab_type(struct uart_port *port) | |
797 | { | |
798 | struct uart_sunsab_port *up = (void *)port; | |
799 | static char buf[36]; | |
800 | ||
801 | sprintf(buf, "SAB82532 %s", sab82532_version[up->type]); | |
802 | return buf; | |
803 | } | |
804 | ||
805 | static void sunsab_release_port(struct uart_port *port) | |
806 | { | |
807 | } | |
808 | ||
809 | static int sunsab_request_port(struct uart_port *port) | |
810 | { | |
811 | return 0; | |
812 | } | |
813 | ||
814 | static void sunsab_config_port(struct uart_port *port, int flags) | |
815 | { | |
816 | } | |
817 | ||
818 | static int sunsab_verify_port(struct uart_port *port, struct serial_struct *ser) | |
819 | { | |
820 | return -EINVAL; | |
821 | } | |
822 | ||
1a607d31 | 823 | static const struct uart_ops sunsab_pops = { |
1da177e4 LT |
824 | .tx_empty = sunsab_tx_empty, |
825 | .set_mctrl = sunsab_set_mctrl, | |
826 | .get_mctrl = sunsab_get_mctrl, | |
827 | .stop_tx = sunsab_stop_tx, | |
828 | .start_tx = sunsab_start_tx, | |
829 | .send_xchar = sunsab_send_xchar, | |
830 | .stop_rx = sunsab_stop_rx, | |
1da177e4 LT |
831 | .break_ctl = sunsab_break_ctl, |
832 | .startup = sunsab_startup, | |
833 | .shutdown = sunsab_shutdown, | |
834 | .set_termios = sunsab_set_termios, | |
835 | .type = sunsab_type, | |
836 | .release_port = sunsab_release_port, | |
837 | .request_port = sunsab_request_port, | |
838 | .config_port = sunsab_config_port, | |
839 | .verify_port = sunsab_verify_port, | |
840 | }; | |
841 | ||
842 | static struct uart_driver sunsab_reg = { | |
843 | .owner = THIS_MODULE, | |
32039f49 | 844 | .driver_name = "sunsab", |
1da177e4 LT |
845 | .dev_name = "ttyS", |
846 | .major = TTY_MAJOR, | |
847 | }; | |
848 | ||
849 | static struct uart_sunsab_port *sunsab_ports; | |
1da177e4 LT |
850 | |
851 | #ifdef CONFIG_SERIAL_SUNSAB_CONSOLE | |
852 | ||
d358788f | 853 | static void sunsab_console_putchar(struct uart_port *port, int c) |
1da177e4 | 854 | { |
72665765 FF |
855 | struct uart_sunsab_port *up = |
856 | container_of(port, struct uart_sunsab_port, port); | |
1da177e4 LT |
857 | |
858 | sunsab_tec_wait(up); | |
859 | writeb(c, &up->regs->w.tic); | |
1da177e4 LT |
860 | } |
861 | ||
862 | static void sunsab_console_write(struct console *con, const char *s, unsigned n) | |
863 | { | |
864 | struct uart_sunsab_port *up = &sunsab_ports[con->index]; | |
f3c681c0 DM |
865 | unsigned long flags; |
866 | int locked = 1; | |
867 | ||
e58e241c DM |
868 | if (up->port.sysrq || oops_in_progress) |
869 | locked = spin_trylock_irqsave(&up->port.lock, flags); | |
870 | else | |
871 | spin_lock_irqsave(&up->port.lock, flags); | |
1da177e4 | 872 | |
d358788f | 873 | uart_console_write(&up->port, s, n, sunsab_console_putchar); |
1da177e4 | 874 | sunsab_tec_wait(up); |
f3c681c0 DM |
875 | |
876 | if (locked) | |
e58e241c | 877 | spin_unlock_irqrestore(&up->port.lock, flags); |
1da177e4 LT |
878 | } |
879 | ||
880 | static int sunsab_console_setup(struct console *con, char *options) | |
881 | { | |
882 | struct uart_sunsab_port *up = &sunsab_ports[con->index]; | |
883 | unsigned long flags; | |
b179fb8c | 884 | unsigned int baud, quot; |
1da177e4 | 885 | |
0f4184f7 MZ |
886 | /* |
887 | * The console framework calls us for each and every port | |
888 | * registered. Defer the console setup until the requested | |
889 | * port has been properly discovered. A bit of a hack, | |
890 | * though... | |
891 | */ | |
892 | if (up->port.type != PORT_SUNSAB) | |
893 | return -1; | |
894 | ||
1da177e4 LT |
895 | printk("Console: ttyS%d (SAB82532)\n", |
896 | (sunsab_reg.minor - 64) + con->index); | |
897 | ||
2dc11581 | 898 | sunserial_console_termios(con, up->port.dev->of_node); |
1da177e4 | 899 | |
1da177e4 LT |
900 | switch (con->cflag & CBAUD) { |
901 | case B150: baud = 150; break; | |
902 | case B300: baud = 300; break; | |
903 | case B600: baud = 600; break; | |
904 | case B1200: baud = 1200; break; | |
905 | case B2400: baud = 2400; break; | |
906 | case B4800: baud = 4800; break; | |
907 | default: case B9600: baud = 9600; break; | |
908 | case B19200: baud = 19200; break; | |
909 | case B38400: baud = 38400; break; | |
c126cf80 ED |
910 | case B57600: baud = 57600; break; |
911 | case B115200: baud = 115200; break; | |
912 | case B230400: baud = 230400; break; | |
913 | case B460800: baud = 460800; break; | |
fc811472 | 914 | } |
1da177e4 LT |
915 | |
916 | /* | |
917 | * Temporary fix. | |
918 | */ | |
919 | spin_lock_init(&up->port.lock); | |
920 | ||
921 | /* | |
922 | * Initialize the hardware | |
923 | */ | |
924 | sunsab_startup(&up->port); | |
925 | ||
926 | spin_lock_irqsave(&up->port.lock, flags); | |
927 | ||
928 | /* | |
929 | * Finally, enable interrupts | |
930 | */ | |
931 | up->interrupt_mask0 = SAB82532_IMR0_PERR | SAB82532_IMR0_FERR | | |
932 | SAB82532_IMR0_PLLA | SAB82532_IMR0_CDSC; | |
933 | writeb(up->interrupt_mask0, &up->regs->w.imr0); | |
934 | up->interrupt_mask1 = SAB82532_IMR1_BRKT | SAB82532_IMR1_ALLS | | |
935 | SAB82532_IMR1_XOFF | SAB82532_IMR1_TIN | | |
936 | SAB82532_IMR1_CSC | SAB82532_IMR1_XON | | |
937 | SAB82532_IMR1_XPR; | |
938 | writeb(up->interrupt_mask1, &up->regs->w.imr1); | |
939 | ||
b179fb8c DM |
940 | quot = uart_get_divisor(&up->port, baud); |
941 | sunsab_convert_to_sab(up, con->cflag, 0, baud, quot); | |
1da177e4 LT |
942 | sunsab_set_mctrl(&up->port, TIOCM_DTR | TIOCM_RTS); |
943 | ||
944 | spin_unlock_irqrestore(&up->port.lock, flags); | |
945 | ||
946 | return 0; | |
947 | } | |
948 | ||
949 | static struct console sunsab_console = { | |
950 | .name = "ttyS", | |
951 | .write = sunsab_console_write, | |
952 | .device = uart_console_device, | |
953 | .setup = sunsab_console_setup, | |
954 | .flags = CON_PRINTBUFFER, | |
955 | .index = -1, | |
956 | .data = &sunsab_reg, | |
957 | }; | |
1da177e4 | 958 | |
1ddb7c98 | 959 | static inline struct console *SUNSAB_CONSOLE(void) |
1da177e4 | 960 | { |
1ddb7c98 | 961 | return &sunsab_console; |
1da177e4 LT |
962 | } |
963 | #else | |
1ddb7c98 | 964 | #define SUNSAB_CONSOLE() (NULL) |
1da177e4 LT |
965 | #define sunsab_console_init() do { } while (0) |
966 | #endif | |
967 | ||
9671f099 | 968 | static int sunsab_init_one(struct uart_sunsab_port *up, |
2dc11581 | 969 | struct platform_device *op, |
89d1d0ab DM |
970 | unsigned long offset, |
971 | int line) | |
1da177e4 | 972 | { |
c4d37215 DM |
973 | up->port.line = line; |
974 | up->port.dev = &op->dev; | |
975 | ||
976 | up->port.mapbase = op->resource[0].start + offset; | |
977 | up->port.membase = of_ioremap(&op->resource[0], offset, | |
978 | sizeof(union sab82532_async_regs), | |
979 | "sab"); | |
980 | if (!up->port.membase) | |
981 | return -ENOMEM; | |
982 | up->regs = (union sab82532_async_regs __iomem *) up->port.membase; | |
1da177e4 | 983 | |
1636f8ac | 984 | up->port.irq = op->archdata.irqs[0]; |
1da177e4 | 985 | |
c4d37215 DM |
986 | up->port.fifosize = SAB82532_XMIT_FIFO_SIZE; |
987 | up->port.iotype = UPIO_MEM; | |
1da177e4 | 988 | |
c4d37215 | 989 | writeb(SAB82532_IPC_IC_ACT_LOW, &up->regs->w.ipc); |
1da177e4 | 990 | |
c4d37215 DM |
991 | up->port.ops = &sunsab_pops; |
992 | up->port.type = PORT_SUNSAB; | |
993 | up->port.uartclk = SAB_BASE_BAUD; | |
1da177e4 | 994 | |
c4d37215 DM |
995 | up->type = readb(&up->regs->r.vstr) & 0x0f; |
996 | writeb(~((1 << 1) | (1 << 2) | (1 << 4)), &up->regs->w.pcr); | |
997 | writeb(0xff, &up->regs->w.pim); | |
998 | if ((up->port.line & 0x1) == 0) { | |
999 | up->pvr_dsr_bit = (1 << 0); | |
1000 | up->pvr_dtr_bit = (1 << 1); | |
9c5b3480 | 1001 | up->gis_shift = 2; |
c4d37215 DM |
1002 | } else { |
1003 | up->pvr_dsr_bit = (1 << 3); | |
1004 | up->pvr_dtr_bit = (1 << 2); | |
9c5b3480 | 1005 | up->gis_shift = 0; |
c4d37215 DM |
1006 | } |
1007 | up->cached_pvr = (1 << 1) | (1 << 2) | (1 << 4); | |
1008 | writeb(up->cached_pvr, &up->regs->w.pvr); | |
1009 | up->cached_mode = readb(&up->regs->rw.mode); | |
1010 | up->cached_mode |= SAB82532_MODE_FRTS; | |
1011 | writeb(up->cached_mode, &up->regs->rw.mode); | |
1012 | up->cached_mode |= SAB82532_MODE_RTS; | |
1013 | writeb(up->cached_mode, &up->regs->rw.mode); | |
1da177e4 | 1014 | |
c4d37215 DM |
1015 | up->tec_timeout = SAB82532_MAX_TEC_TIMEOUT; |
1016 | up->cec_timeout = SAB82532_MAX_CEC_TIMEOUT; | |
1da177e4 | 1017 | |
c4d37215 | 1018 | return 0; |
1da177e4 LT |
1019 | } |
1020 | ||
9671f099 | 1021 | static int sab_probe(struct platform_device *op) |
1da177e4 | 1022 | { |
c4d37215 DM |
1023 | static int inst; |
1024 | struct uart_sunsab_port *up; | |
1025 | int err; | |
1026 | ||
1027 | up = &sunsab_ports[inst * 2]; | |
1028 | ||
1029 | err = sunsab_init_one(&up[0], op, | |
bda2f7b4 | 1030 | 0, |
c4d37215 DM |
1031 | (inst * 2) + 0); |
1032 | if (err) | |
9c5b3480 | 1033 | goto out; |
c4d37215 | 1034 | |
bda2f7b4 DM |
1035 | err = sunsab_init_one(&up[1], op, |
1036 | sizeof(union sab82532_async_regs), | |
c4d37215 | 1037 | (inst * 2) + 1); |
9c5b3480 AV |
1038 | if (err) |
1039 | goto out1; | |
1da177e4 | 1040 | |
61c7a080 | 1041 | sunserial_console_match(SUNSAB_CONSOLE(), op->dev.of_node, |
4e3533d0 DM |
1042 | &sunsab_reg, up[0].port.line, |
1043 | false); | |
c73fcc84 | 1044 | |
61c7a080 | 1045 | sunserial_console_match(SUNSAB_CONSOLE(), op->dev.of_node, |
4e3533d0 DM |
1046 | &sunsab_reg, up[1].port.line, |
1047 | false); | |
9c5b3480 AV |
1048 | |
1049 | err = uart_add_one_port(&sunsab_reg, &up[0].port); | |
1050 | if (err) | |
1051 | goto out2; | |
1052 | ||
1053 | err = uart_add_one_port(&sunsab_reg, &up[1].port); | |
1054 | if (err) | |
1055 | goto out3; | |
1da177e4 | 1056 | |
696faedd | 1057 | platform_set_drvdata(op, &up[0]); |
1da177e4 | 1058 | |
c4d37215 | 1059 | inst++; |
1da177e4 | 1060 | |
1da177e4 | 1061 | return 0; |
e3a411a3 | 1062 | |
9c5b3480 AV |
1063 | out3: |
1064 | uart_remove_one_port(&sunsab_reg, &up[0].port); | |
1065 | out2: | |
e3a411a3 | 1066 | of_iounmap(&op->resource[0], |
9c5b3480 | 1067 | up[1].port.membase, |
c4d37215 | 1068 | sizeof(union sab82532_async_regs)); |
9c5b3480 AV |
1069 | out1: |
1070 | of_iounmap(&op->resource[0], | |
1071 | up[0].port.membase, | |
1072 | sizeof(union sab82532_async_regs)); | |
1073 | out: | |
1074 | return err; | |
1da177e4 LT |
1075 | } |
1076 | ||
ae8d8a14 | 1077 | static int sab_remove(struct platform_device *op) |
1da177e4 | 1078 | { |
696faedd | 1079 | struct uart_sunsab_port *up = platform_get_drvdata(op); |
1da177e4 | 1080 | |
9c5b3480 AV |
1081 | uart_remove_one_port(&sunsab_reg, &up[1].port); |
1082 | uart_remove_one_port(&sunsab_reg, &up[0].port); | |
1083 | of_iounmap(&op->resource[0], | |
1084 | up[1].port.membase, | |
1085 | sizeof(union sab82532_async_regs)); | |
1086 | of_iounmap(&op->resource[0], | |
1087 | up[0].port.membase, | |
1088 | sizeof(union sab82532_async_regs)); | |
1da177e4 | 1089 | |
c4d37215 DM |
1090 | return 0; |
1091 | } | |
1da177e4 | 1092 | |
fd098316 | 1093 | static const struct of_device_id sab_match[] = { |
c4d37215 DM |
1094 | { |
1095 | .name = "se", | |
1096 | }, | |
1097 | { | |
1098 | .name = "serial", | |
1099 | .compatible = "sab82532", | |
1100 | }, | |
1101 | {}, | |
1102 | }; | |
1103 | MODULE_DEVICE_TABLE(of, sab_match); | |
1da177e4 | 1104 | |
793218df | 1105 | static struct platform_driver sab_driver = { |
4018294b GL |
1106 | .driver = { |
1107 | .name = "sab", | |
4018294b GL |
1108 | .of_match_table = sab_match, |
1109 | }, | |
c4d37215 | 1110 | .probe = sab_probe, |
2d47b716 | 1111 | .remove = sab_remove, |
c4d37215 | 1112 | }; |
1da177e4 | 1113 | |
c4d37215 DM |
1114 | static int __init sunsab_init(void) |
1115 | { | |
1116 | struct device_node *dp; | |
1117 | int err; | |
58d784a5 | 1118 | int num_channels = 0; |
c4d37215 | 1119 | |
bda2f7b4 | 1120 | for_each_node_by_name(dp, "se") |
c4d37215 DM |
1121 | num_channels += 2; |
1122 | for_each_node_by_name(dp, "serial") { | |
1123 | if (of_device_is_compatible(dp, "sab82532")) | |
1124 | num_channels += 2; | |
1da177e4 LT |
1125 | } |
1126 | ||
c4d37215 | 1127 | if (num_channels) { |
6396bb22 KC |
1128 | sunsab_ports = kcalloc(num_channels, |
1129 | sizeof(struct uart_sunsab_port), | |
1130 | GFP_KERNEL); | |
c4d37215 DM |
1131 | if (!sunsab_ports) |
1132 | return -ENOMEM; | |
f5deb807 | 1133 | |
58d784a5 | 1134 | err = sunserial_register_minors(&sunsab_reg, num_channels); |
c4d37215 DM |
1135 | if (err) { |
1136 | kfree(sunsab_ports); | |
1137 | sunsab_ports = NULL; | |
1da177e4 | 1138 | |
c4d37215 DM |
1139 | return err; |
1140 | } | |
1da177e4 LT |
1141 | } |
1142 | ||
793218df | 1143 | return platform_driver_register(&sab_driver); |
1da177e4 LT |
1144 | } |
1145 | ||
1146 | static void __exit sunsab_exit(void) | |
1147 | { | |
793218df | 1148 | platform_driver_unregister(&sab_driver); |
58d784a5 MH |
1149 | if (sunsab_reg.nr) { |
1150 | sunserial_unregister_minors(&sunsab_reg, sunsab_reg.nr); | |
1da177e4 LT |
1151 | } |
1152 | ||
1da177e4 LT |
1153 | kfree(sunsab_ports); |
1154 | sunsab_ports = NULL; | |
1155 | } | |
1156 | ||
1157 | module_init(sunsab_init); | |
1158 | module_exit(sunsab_exit); | |
1159 | ||
1160 | MODULE_AUTHOR("Eddie C. Dost and David S. Miller"); | |
1161 | MODULE_DESCRIPTION("Sun SAB82532 serial port driver"); | |
1162 | MODULE_LICENSE("GPL"); |