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dm writecache: add cond_resched to loop in persistent_memory_claim()
[linux/fpc-iii.git] / drivers / tty / serial / 8250 / 8250_exar.c
blob59449b6500cd600db3d30ad4328df90aea651739
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Probe module for 8250/16550-type Exar chips PCI serial ports.
4 *
5 * Based on drivers/tty/serial/8250/8250_pci.c,
6 *
7 * Copyright (C) 2017 Sudip Mukherjee, All Rights Reserved.
8 */
9 #include <linux/acpi.h>
10 #include <linux/dmi.h>
11 #include <linux/io.h>
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/pci.h>
15 #include <linux/property.h>
16 #include <linux/serial_core.h>
17 #include <linux/serial_reg.h>
18 #include <linux/slab.h>
19 #include <linux/string.h>
20 #include <linux/tty.h>
21 #include <linux/8250_pci.h>
22 #include <linux/delay.h>
23
24 #include <asm/byteorder.h>
25
26 #include "8250.h"
27
28 #define PCI_DEVICE_ID_ACCES_COM_2S 0x1052
29 #define PCI_DEVICE_ID_ACCES_COM_4S 0x105d
30 #define PCI_DEVICE_ID_ACCES_COM_8S 0x106c
31 #define PCI_DEVICE_ID_ACCES_COM232_8 0x10a8
32 #define PCI_DEVICE_ID_ACCES_COM_2SM 0x10d2
33 #define PCI_DEVICE_ID_ACCES_COM_4SM 0x10db
34 #define PCI_DEVICE_ID_ACCES_COM_8SM 0x10ea
35
36 #define PCI_DEVICE_ID_COMMTECH_4224PCI335 0x0002
37 #define PCI_DEVICE_ID_COMMTECH_4222PCI335 0x0004
38 #define PCI_DEVICE_ID_COMMTECH_2324PCI335 0x000a
39 #define PCI_DEVICE_ID_COMMTECH_2328PCI335 0x000b
40 #define PCI_DEVICE_ID_COMMTECH_4224PCIE 0x0020
41 #define PCI_DEVICE_ID_COMMTECH_4228PCIE 0x0021
42 #define PCI_DEVICE_ID_COMMTECH_4222PCIE 0x0022
43 #define PCI_DEVICE_ID_EXAR_XR17V4358 0x4358
44 #define PCI_DEVICE_ID_EXAR_XR17V8358 0x8358
45
46 #define UART_EXAR_INT0 0x80
47 #define UART_EXAR_8XMODE 0x88 /* 8X sampling rate select */
48 #define UART_EXAR_SLEEP 0x8b /* Sleep mode */
49 #define UART_EXAR_DVID 0x8d /* Device identification */
50
51 #define UART_EXAR_FCTR 0x08 /* Feature Control Register */
52 #define UART_FCTR_EXAR_IRDA 0x10 /* IrDa data encode select */
53 #define UART_FCTR_EXAR_485 0x20 /* Auto 485 half duplex dir ctl */
54 #define UART_FCTR_EXAR_TRGA 0x00 /* FIFO trigger table A */
55 #define UART_FCTR_EXAR_TRGB 0x60 /* FIFO trigger table B */
56 #define UART_FCTR_EXAR_TRGC 0x80 /* FIFO trigger table C */
57 #define UART_FCTR_EXAR_TRGD 0xc0 /* FIFO trigger table D programmable */
58
59 #define UART_EXAR_TXTRG 0x0a /* Tx FIFO trigger level write-only */
60 #define UART_EXAR_RXTRG 0x0b /* Rx FIFO trigger level write-only */
61
62 #define UART_EXAR_MPIOINT_7_0 0x8f /* MPIOINT[7:0] */
63 #define UART_EXAR_MPIOLVL_7_0 0x90 /* MPIOLVL[7:0] */
64 #define UART_EXAR_MPIO3T_7_0 0x91 /* MPIO3T[7:0] */
65 #define UART_EXAR_MPIOINV_7_0 0x92 /* MPIOINV[7:0] */
66 #define UART_EXAR_MPIOSEL_7_0 0x93 /* MPIOSEL[7:0] */
67 #define UART_EXAR_MPIOOD_7_0 0x94 /* MPIOOD[7:0] */
68 #define UART_EXAR_MPIOINT_15_8 0x95 /* MPIOINT[15:8] */
69 #define UART_EXAR_MPIOLVL_15_8 0x96 /* MPIOLVL[15:8] */
70 #define UART_EXAR_MPIO3T_15_8 0x97 /* MPIO3T[15:8] */
71 #define UART_EXAR_MPIOINV_15_8 0x98 /* MPIOINV[15:8] */
72 #define UART_EXAR_MPIOSEL_15_8 0x99 /* MPIOSEL[15:8] */
73 #define UART_EXAR_MPIOOD_15_8 0x9a /* MPIOOD[15:8] */
74
75 #define UART_EXAR_RS485_DLY(x) ((x) << 4)
76
77 /*
78 * IOT2040 MPIO wiring semantics:
79 *
80 * MPIO Port Function
81 * ---- ---- --------
82 * 0 2 Mode bit 0
83 * 1 2 Mode bit 1
84 * 2 2 Terminate bus
85 * 3 - <reserved>
86 * 4 3 Mode bit 0
87 * 5 3 Mode bit 1
88 * 6 3 Terminate bus
89 * 7 - <reserved>
90 * 8 2 Enable
91 * 9 3 Enable
92 * 10 - Red LED
93 * 11..15 - <unused>
94 */
95
96 /* IOT2040 MPIOs 0..7 */
97 #define IOT2040_UART_MODE_RS232 0x01
98 #define IOT2040_UART_MODE_RS485 0x02
99 #define IOT2040_UART_MODE_RS422 0x03
100 #define IOT2040_UART_TERMINATE_BUS 0x04
101
102 #define IOT2040_UART1_MASK 0x0f
103 #define IOT2040_UART2_SHIFT 4
104
105 #define IOT2040_UARTS_DEFAULT_MODE 0x11 /* both RS232 */
106 #define IOT2040_UARTS_GPIO_LO_MODE 0x88 /* reserved pins as input */
107
108 /* IOT2040 MPIOs 8..15 */
109 #define IOT2040_UARTS_ENABLE 0x03
110 #define IOT2040_UARTS_GPIO_HI_MODE 0xF8 /* enable & LED as outputs */
111
112 struct exar8250;
113
114 struct exar8250_platform {
115 int (*rs485_config)(struct uart_port *, struct serial_rs485 *);
116 int (*register_gpio)(struct pci_dev *, struct uart_8250_port *);
117 };
118
119 /**
120 * struct exar8250_board - board information
121 * @num_ports: number of serial ports
122 * @reg_shift: describes UART register mapping in PCI memory
123 * @setup: quirk run at ->probe() stage
124 * @exit: quirk run at ->remove() stage
125 */
126 struct exar8250_board {
127 unsigned int num_ports;
128 unsigned int reg_shift;
129 int (*setup)(struct exar8250 *, struct pci_dev *,
130 struct uart_8250_port *, int);
131 void (*exit)(struct pci_dev *pcidev);
132 };
133
134 struct exar8250 {
135 unsigned int nr;
136 struct exar8250_board *board;
137 void __iomem *virt;
138 int line[];
139 };
140
141 static void exar_pm(struct uart_port *port, unsigned int state, unsigned int old)
142 {
143 /*
144 * Exar UARTs have a SLEEP register that enables or disables each UART
145 * to enter sleep mode separately. On the XR17V35x the register
146 * is accessible to each UART at the UART_EXAR_SLEEP offset, but
147 * the UART channel may only write to the corresponding bit.
148 */
149 serial_port_out(port, UART_EXAR_SLEEP, state ? 0xff : 0);
150 }
151
152 /*
153 * XR17V35x UARTs have an extra fractional divisor register (DLD)
154 * Calculate divisor with extra 4-bit fractional portion
155 */
156 static unsigned int xr17v35x_get_divisor(struct uart_port *p, unsigned int baud,
157 unsigned int *frac)
158 {
159 unsigned int quot_16;
160
161 quot_16 = DIV_ROUND_CLOSEST(p->uartclk, baud);
162 *frac = quot_16 & 0x0f;
163
164 return quot_16 >> 4;
165 }
166
167 static void xr17v35x_set_divisor(struct uart_port *p, unsigned int baud,
168 unsigned int quot, unsigned int quot_frac)
169 {
170 serial8250_do_set_divisor(p, baud, quot, quot_frac);
171
172 /* Preserve bits not related to baudrate; DLD[7:4]. */
173 quot_frac |= serial_port_in(p, 0x2) & 0xf0;
174 serial_port_out(p, 0x2, quot_frac);
175 }
176
177 static int xr17v35x_startup(struct uart_port *port)
178 {
179 /*
180 * First enable access to IER [7:5], ISR [5:4], FCR [5:4],
181 * MCR [7:5] and MSR [7:0]
182 */
183 serial_port_out(port, UART_XR_EFR, UART_EFR_ECB);
184
185 /*
186 * Make sure all interrups are masked until initialization is
187 * complete and the FIFOs are cleared
188 */
189 serial_port_out(port, UART_IER, 0);
190
191 return serial8250_do_startup(port);
192 }
193
194 static void exar_shutdown(struct uart_port *port)
195 {
196 unsigned char lsr;
197 bool tx_complete = false;
198 struct uart_8250_port *up = up_to_u8250p(port);
199 struct circ_buf *xmit = &port->state->xmit;
200 int i = 0;
201
202 do {
203 lsr = serial_in(up, UART_LSR);
204 if (lsr & (UART_LSR_TEMT | UART_LSR_THRE))
205 tx_complete = true;
206 else
207 tx_complete = false;
208 usleep_range(1000, 1100);
209 } while (!uart_circ_empty(xmit) && !tx_complete && i++ < 1000);
210
211 serial8250_do_shutdown(port);
212 }
213
214 static int default_setup(struct exar8250 *priv, struct pci_dev *pcidev,
215 int idx, unsigned int offset,
216 struct uart_8250_port *port)
217 {
218 const struct exar8250_board *board = priv->board;
219 unsigned int bar = 0;
220 unsigned char status;
221
222 port->port.iotype = UPIO_MEM;
223 port->port.mapbase = pci_resource_start(pcidev, bar) + offset;
224 port->port.membase = priv->virt + offset;
225 port->port.regshift = board->reg_shift;
226
227 /*
228 * XR17V35x UARTs have an extra divisor register, DLD that gets enabled
229 * with when DLAB is set which will cause the device to incorrectly match
230 * and assign port type to PORT_16650. The EFR for this UART is found
231 * at offset 0x09. Instead check the Deice ID (DVID) register
232 * for a 2, 4 or 8 port UART.
233 */
234 status = readb(port->port.membase + UART_EXAR_DVID);
235 if (status == 0x82 || status == 0x84 || status == 0x88) {
236 port->port.type = PORT_XR17V35X;
237
238 port->port.get_divisor = xr17v35x_get_divisor;
239 port->port.set_divisor = xr17v35x_set_divisor;
240
241 port->port.startup = xr17v35x_startup;
242 } else {
243 port->port.type = PORT_XR17D15X;
244 }
245
246 port->port.pm = exar_pm;
247 port->port.shutdown = exar_shutdown;
248
249 return 0;
250 }
251
252 static int
253 pci_fastcom335_setup(struct exar8250 *priv, struct pci_dev *pcidev,
254 struct uart_8250_port *port, int idx)
255 {
256 unsigned int offset = idx * 0x200;
257 unsigned int baud = 1843200;
258 u8 __iomem *p;
259 int err;
260
261 port->port.uartclk = baud * 16;
262
263 err = default_setup(priv, pcidev, idx, offset, port);
264 if (err)
265 return err;
266
267 p = port->port.membase;
268
269 writeb(0x00, p + UART_EXAR_8XMODE);
270 writeb(UART_FCTR_EXAR_TRGD, p + UART_EXAR_FCTR);
271 writeb(32, p + UART_EXAR_TXTRG);
272 writeb(32, p + UART_EXAR_RXTRG);
273
274 /*
275 * Setup Multipurpose Input/Output pins.
276 */
277 if (idx == 0) {
278 switch (pcidev->device) {
279 case PCI_DEVICE_ID_COMMTECH_4222PCI335:
280 case PCI_DEVICE_ID_COMMTECH_4224PCI335:
281 writeb(0x78, p + UART_EXAR_MPIOLVL_7_0);
282 writeb(0x00, p + UART_EXAR_MPIOINV_7_0);
283 writeb(0x00, p + UART_EXAR_MPIOSEL_7_0);
284 break;
285 case PCI_DEVICE_ID_COMMTECH_2324PCI335:
286 case PCI_DEVICE_ID_COMMTECH_2328PCI335:
287 writeb(0x00, p + UART_EXAR_MPIOLVL_7_0);
288 writeb(0xc0, p + UART_EXAR_MPIOINV_7_0);
289 writeb(0xc0, p + UART_EXAR_MPIOSEL_7_0);
290 break;
291 }
292 writeb(0x00, p + UART_EXAR_MPIOINT_7_0);
293 writeb(0x00, p + UART_EXAR_MPIO3T_7_0);
294 writeb(0x00, p + UART_EXAR_MPIOOD_7_0);
295 }
296
297 return 0;
298 }
299
300 static int
301 pci_connect_tech_setup(struct exar8250 *priv, struct pci_dev *pcidev,
302 struct uart_8250_port *port, int idx)
303 {
304 unsigned int offset = idx * 0x200;
305 unsigned int baud = 1843200;
306
307 port->port.uartclk = baud * 16;
308 return default_setup(priv, pcidev, idx, offset, port);
309 }
310
311 static int
312 pci_xr17c154_setup(struct exar8250 *priv, struct pci_dev *pcidev,
313 struct uart_8250_port *port, int idx)
314 {
315 unsigned int offset = idx * 0x200;
316 unsigned int baud = 921600;
317
318 port->port.uartclk = baud * 16;
319 return default_setup(priv, pcidev, idx, offset, port);
320 }
321
322 static void setup_gpio(struct pci_dev *pcidev, u8 __iomem *p)
323 {
324 /*
325 * The Commtech adapters required the MPIOs to be driven low. The Exar
326 * devices will export them as GPIOs, so we pre-configure them safely
327 * as inputs.
328 */
329 u8 dir = pcidev->vendor == PCI_VENDOR_ID_EXAR ? 0xff : 0x00;
330
331 writeb(0x00, p + UART_EXAR_MPIOINT_7_0);
332 writeb(0x00, p + UART_EXAR_MPIOLVL_7_0);
333 writeb(0x00, p + UART_EXAR_MPIO3T_7_0);
334 writeb(0x00, p + UART_EXAR_MPIOINV_7_0);
335 writeb(dir, p + UART_EXAR_MPIOSEL_7_0);
336 writeb(0x00, p + UART_EXAR_MPIOOD_7_0);
337 writeb(0x00, p + UART_EXAR_MPIOINT_15_8);
338 writeb(0x00, p + UART_EXAR_MPIOLVL_15_8);
339 writeb(0x00, p + UART_EXAR_MPIO3T_15_8);
340 writeb(0x00, p + UART_EXAR_MPIOINV_15_8);
341 writeb(dir, p + UART_EXAR_MPIOSEL_15_8);
342 writeb(0x00, p + UART_EXAR_MPIOOD_15_8);
343 }
344
345 static void *
346 __xr17v35x_register_gpio(struct pci_dev *pcidev,
347 const struct property_entry *properties)
348 {
349 struct platform_device *pdev;
350
351 pdev = platform_device_alloc("gpio_exar", PLATFORM_DEVID_AUTO);
352 if (!pdev)
353 return NULL;
354
355 pdev->dev.parent = &pcidev->dev;
356 ACPI_COMPANION_SET(&pdev->dev, ACPI_COMPANION(&pcidev->dev));
357
358 if (platform_device_add_properties(pdev, properties) < 0 ||
359 platform_device_add(pdev) < 0) {
360 platform_device_put(pdev);
361 return NULL;
362 }
363
364 return pdev;
365 }
366
367 static const struct property_entry exar_gpio_properties[] = {
368 PROPERTY_ENTRY_U32("exar,first-pin", 0),
369 PROPERTY_ENTRY_U32("ngpios", 16),
370 { }
371 };
372
373 static int xr17v35x_register_gpio(struct pci_dev *pcidev,
374 struct uart_8250_port *port)
375 {
376 if (pcidev->vendor == PCI_VENDOR_ID_EXAR)
377 port->port.private_data =
378 __xr17v35x_register_gpio(pcidev, exar_gpio_properties);
379
380 return 0;
381 }
382
383 static int generic_rs485_config(struct uart_port *port,
384 struct serial_rs485 *rs485)
385 {
386 bool is_rs485 = !!(rs485->flags & SER_RS485_ENABLED);
387 u8 __iomem *p = port->membase;
388 u8 value;
389
390 value = readb(p + UART_EXAR_FCTR);
391 if (is_rs485)
392 value |= UART_FCTR_EXAR_485;
393 else
394 value &= ~UART_FCTR_EXAR_485;
395
396 writeb(value, p + UART_EXAR_FCTR);
397
398 if (is_rs485)
399 writeb(UART_EXAR_RS485_DLY(4), p + UART_MSR);
400
401 port->rs485 = *rs485;
402
403 return 0;
404 }
405
406 static const struct exar8250_platform exar8250_default_platform = {
407 .register_gpio = xr17v35x_register_gpio,
408 .rs485_config = generic_rs485_config,
409 };
410
411 static int iot2040_rs485_config(struct uart_port *port,
412 struct serial_rs485 *rs485)
413 {
414 bool is_rs485 = !!(rs485->flags & SER_RS485_ENABLED);
415 u8 __iomem *p = port->membase;
416 u8 mask = IOT2040_UART1_MASK;
417 u8 mode, value;
418
419 if (is_rs485) {
420 if (rs485->flags & SER_RS485_RX_DURING_TX)
421 mode = IOT2040_UART_MODE_RS422;
422 else
423 mode = IOT2040_UART_MODE_RS485;
424
425 if (rs485->flags & SER_RS485_TERMINATE_BUS)
426 mode |= IOT2040_UART_TERMINATE_BUS;
427 } else {
428 mode = IOT2040_UART_MODE_RS232;
429 }
430
431 if (port->line == 3) {
432 mask <<= IOT2040_UART2_SHIFT;
433 mode <<= IOT2040_UART2_SHIFT;
434 }
435
436 value = readb(p + UART_EXAR_MPIOLVL_7_0);
437 value &= ~mask;
438 value |= mode;
439 writeb(value, p + UART_EXAR_MPIOLVL_7_0);
440
441 return generic_rs485_config(port, rs485);
442 }
443
444 static const struct property_entry iot2040_gpio_properties[] = {
445 PROPERTY_ENTRY_U32("exar,first-pin", 10),
446 PROPERTY_ENTRY_U32("ngpios", 1),
447 { }
448 };
449
450 static int iot2040_register_gpio(struct pci_dev *pcidev,
451 struct uart_8250_port *port)
452 {
453 u8 __iomem *p = port->port.membase;
454
455 writeb(IOT2040_UARTS_DEFAULT_MODE, p + UART_EXAR_MPIOLVL_7_0);
456 writeb(IOT2040_UARTS_GPIO_LO_MODE, p + UART_EXAR_MPIOSEL_7_0);
457 writeb(IOT2040_UARTS_ENABLE, p + UART_EXAR_MPIOLVL_15_8);
458 writeb(IOT2040_UARTS_GPIO_HI_MODE, p + UART_EXAR_MPIOSEL_15_8);
459
460 port->port.private_data =
461 __xr17v35x_register_gpio(pcidev, iot2040_gpio_properties);
462
463 return 0;
464 }
465
466 static const struct exar8250_platform iot2040_platform = {
467 .rs485_config = iot2040_rs485_config,
468 .register_gpio = iot2040_register_gpio,
469 };
470
471 /*
472 * For SIMATIC IOT2000, only IOT2040 and its variants have the Exar device,
473 * IOT2020 doesn't have. Therefore it is sufficient to match on the common
474 * board name after the device was found.
475 */
476 static const struct dmi_system_id exar_platforms[] = {
477 {
478 .matches = {
479 DMI_EXACT_MATCH(DMI_BOARD_NAME, "SIMATIC IOT2000"),
480 },
481 .driver_data = (void *)&iot2040_platform,
482 },
483 {}
484 };
485
486 static int
487 pci_xr17v35x_setup(struct exar8250 *priv, struct pci_dev *pcidev,
488 struct uart_8250_port *port, int idx)
489 {
490 const struct exar8250_platform *platform;
491 const struct dmi_system_id *dmi_match;
492 unsigned int offset = idx * 0x400;
493 unsigned int baud = 7812500;
494 u8 __iomem *p;
495 int ret;
496
497 dmi_match = dmi_first_match(exar_platforms);
498 if (dmi_match)
499 platform = dmi_match->driver_data;
500 else
501 platform = &exar8250_default_platform;
502
503 port->port.uartclk = baud * 16;
504 port->port.rs485_config = platform->rs485_config;
505
506 /*
507 * Setup the UART clock for the devices on expansion slot to
508 * half the clock speed of the main chip (which is 125MHz)
509 */
510 if (idx >= 8)
511 port->port.uartclk /= 2;
512
513 ret = default_setup(priv, pcidev, idx, offset, port);
514 if (ret)
515 return ret;
516
517 p = port->port.membase;
518
519 writeb(0x00, p + UART_EXAR_8XMODE);
520 writeb(UART_FCTR_EXAR_TRGD, p + UART_EXAR_FCTR);
521 writeb(128, p + UART_EXAR_TXTRG);
522 writeb(128, p + UART_EXAR_RXTRG);
523
524 if (idx == 0) {
525 /* Setup Multipurpose Input/Output pins. */
526 setup_gpio(pcidev, p);
527
528 ret = platform->register_gpio(pcidev, port);
529 }
530
531 return ret;
532 }
533
534 static void pci_xr17v35x_exit(struct pci_dev *pcidev)
535 {
536 struct exar8250 *priv = pci_get_drvdata(pcidev);
537 struct uart_8250_port *port = serial8250_get_port(priv->line[0]);
538 struct platform_device *pdev = port->port.private_data;
539
540 platform_device_unregister(pdev);
541 port->port.private_data = NULL;
542 }
543
544 static inline void exar_misc_clear(struct exar8250 *priv)
545 {
546 /* Clear all PCI interrupts by reading INT0. No effect on IIR */
547 readb(priv->virt + UART_EXAR_INT0);
548
549 /* Clear INT0 for Expansion Interface slave ports, too */
550 if (priv->board->num_ports > 8)
551 readb(priv->virt + 0x2000 + UART_EXAR_INT0);
552 }
553
554 /*
555 * These Exar UARTs have an extra interrupt indicator that could fire for a
556 * few interrupts that are not presented/cleared through IIR. One of which is
557 * a wakeup interrupt when coming out of sleep. These interrupts are only
558 * cleared by reading global INT0 or INT1 registers as interrupts are
559 * associated with channel 0. The INT[3:0] registers _are_ accessible from each
560 * channel's address space, but for the sake of bus efficiency we register a
561 * dedicated handler at the PCI device level to handle them.
562 */
563 static irqreturn_t exar_misc_handler(int irq, void *data)
564 {
565 exar_misc_clear(data);
566
567 return IRQ_HANDLED;
568 }
569
570 static int
571 exar_pci_probe(struct pci_dev *pcidev, const struct pci_device_id *ent)
572 {
573 unsigned int nr_ports, i, bar = 0, maxnr;
574 struct exar8250_board *board;
575 struct uart_8250_port uart;
576 struct exar8250 *priv;
577 int rc;
578
579 board = (struct exar8250_board *)ent->driver_data;
580 if (!board)
581 return -EINVAL;
582
583 rc = pcim_enable_device(pcidev);
584 if (rc)
585 return rc;
586
587 maxnr = pci_resource_len(pcidev, bar) >> (board->reg_shift + 3);
588
589 nr_ports = board->num_ports ? board->num_ports : pcidev->device & 0x0f;
590
591 priv = devm_kzalloc(&pcidev->dev, struct_size(priv, line, nr_ports), GFP_KERNEL);
592 if (!priv)
593 return -ENOMEM;
594
595 priv->board = board;
596 priv->virt = pcim_iomap(pcidev, bar, 0);
597 if (!priv->virt)
598 return -ENOMEM;
599
600 pci_set_master(pcidev);
601
602 rc = pci_alloc_irq_vectors(pcidev, 1, 1, PCI_IRQ_ALL_TYPES);
603 if (rc < 0)
604 return rc;
605
606 memset(&uart, 0, sizeof(uart));
607 uart.port.flags = UPF_SHARE_IRQ | UPF_EXAR_EFR | UPF_FIXED_TYPE | UPF_FIXED_PORT;
608 uart.port.irq = pci_irq_vector(pcidev, 0);
609 uart.port.dev = &pcidev->dev;
610
611 rc = devm_request_irq(&pcidev->dev, uart.port.irq, exar_misc_handler,
612 IRQF_SHARED, "exar_uart", priv);
613 if (rc)
614 return rc;
615
616 /* Clear interrupts */
617 exar_misc_clear(priv);
618
619 for (i = 0; i < nr_ports && i < maxnr; i++) {
620 rc = board->setup(priv, pcidev, &uart, i);
621 if (rc) {
622 dev_err(&pcidev->dev, "Failed to setup port %u\n", i);
623 break;
624 }
625
626 dev_dbg(&pcidev->dev, "Setup PCI port: port %lx, irq %d, type %d\n",
627 uart.port.iobase, uart.port.irq, uart.port.iotype);
628
629 priv->line[i] = serial8250_register_8250_port(&uart);
630 if (priv->line[i] < 0) {
631 dev_err(&pcidev->dev,
632 "Couldn't register serial port %lx, irq %d, type %d, error %d\n",
633 uart.port.iobase, uart.port.irq,
634 uart.port.iotype, priv->line[i]);
635 break;
636 }
637 }
638 priv->nr = i;
639 pci_set_drvdata(pcidev, priv);
640 return 0;
641 }
642
643 static void exar_pci_remove(struct pci_dev *pcidev)
644 {
645 struct exar8250 *priv = pci_get_drvdata(pcidev);
646 unsigned int i;
647
648 for (i = 0; i < priv->nr; i++)
649 serial8250_unregister_port(priv->line[i]);
650
651 if (priv->board->exit)
652 priv->board->exit(pcidev);
653 }
654
655 static int __maybe_unused exar_suspend(struct device *dev)
656 {
657 struct pci_dev *pcidev = to_pci_dev(dev);
658 struct exar8250 *priv = pci_get_drvdata(pcidev);
659 unsigned int i;
660
661 for (i = 0; i < priv->nr; i++)
662 if (priv->line[i] >= 0)
663 serial8250_suspend_port(priv->line[i]);
664
665 /* Ensure that every init quirk is properly torn down */
666 if (priv->board->exit)
667 priv->board->exit(pcidev);
668
669 return 0;
670 }
671
672 static int __maybe_unused exar_resume(struct device *dev)
673 {
674 struct exar8250 *priv = dev_get_drvdata(dev);
675 unsigned int i;
676
677 exar_misc_clear(priv);
678
679 for (i = 0; i < priv->nr; i++)
680 if (priv->line[i] >= 0)
681 serial8250_resume_port(priv->line[i]);
682
683 return 0;
684 }
685
686 static SIMPLE_DEV_PM_OPS(exar_pci_pm, exar_suspend, exar_resume);
687
688 static const struct exar8250_board acces_com_2x = {
689 .num_ports = 2,
690 .setup = pci_xr17c154_setup,
691 };
692
693 static const struct exar8250_board acces_com_4x = {
694 .num_ports = 4,
695 .setup = pci_xr17c154_setup,
696 };
697
698 static const struct exar8250_board acces_com_8x = {
699 .num_ports = 8,
700 .setup = pci_xr17c154_setup,
701 };
702
703
704 static const struct exar8250_board pbn_fastcom335_2 = {
705 .num_ports = 2,
706 .setup = pci_fastcom335_setup,
707 };
708
709 static const struct exar8250_board pbn_fastcom335_4 = {
710 .num_ports = 4,
711 .setup = pci_fastcom335_setup,
712 };
713
714 static const struct exar8250_board pbn_fastcom335_8 = {
715 .num_ports = 8,
716 .setup = pci_fastcom335_setup,
717 };
718
719 static const struct exar8250_board pbn_connect = {
720 .setup = pci_connect_tech_setup,
721 };
722
723 static const struct exar8250_board pbn_exar_ibm_saturn = {
724 .num_ports = 1,
725 .setup = pci_xr17c154_setup,
726 };
727
728 static const struct exar8250_board pbn_exar_XR17C15x = {
729 .setup = pci_xr17c154_setup,
730 };
731
732 static const struct exar8250_board pbn_exar_XR17V35x = {
733 .setup = pci_xr17v35x_setup,
734 .exit = pci_xr17v35x_exit,
735 };
736
737 static const struct exar8250_board pbn_exar_XR17V4358 = {
738 .num_ports = 12,
739 .setup = pci_xr17v35x_setup,
740 .exit = pci_xr17v35x_exit,
741 };
742
743 static const struct exar8250_board pbn_exar_XR17V8358 = {
744 .num_ports = 16,
745 .setup = pci_xr17v35x_setup,
746 .exit = pci_xr17v35x_exit,
747 };
748
749 #define CONNECT_DEVICE(devid, sdevid, bd) { \
750 PCI_DEVICE_SUB( \
751 PCI_VENDOR_ID_EXAR, \
752 PCI_DEVICE_ID_EXAR_##devid, \
753 PCI_SUBVENDOR_ID_CONNECT_TECH, \
754 PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_##sdevid), 0, 0, \
755 (kernel_ulong_t)&bd \
756 }
757
758 #define EXAR_DEVICE(vend, devid, bd) { \
759 PCI_VDEVICE(vend, PCI_DEVICE_ID_##devid), (kernel_ulong_t)&bd \
760 }
761
762 #define IBM_DEVICE(devid, sdevid, bd) { \
763 PCI_DEVICE_SUB( \
764 PCI_VENDOR_ID_EXAR, \
765 PCI_DEVICE_ID_EXAR_##devid, \
766 PCI_VENDOR_ID_IBM, \
767 PCI_SUBDEVICE_ID_IBM_##sdevid), 0, 0, \
768 (kernel_ulong_t)&bd \
769 }
770
771 static const struct pci_device_id exar_pci_tbl[] = {
772 EXAR_DEVICE(ACCESSIO, ACCES_COM_2S, acces_com_2x),
773 EXAR_DEVICE(ACCESSIO, ACCES_COM_4S, acces_com_4x),
774 EXAR_DEVICE(ACCESSIO, ACCES_COM_8S, acces_com_8x),
775 EXAR_DEVICE(ACCESSIO, ACCES_COM232_8, acces_com_8x),
776 EXAR_DEVICE(ACCESSIO, ACCES_COM_2SM, acces_com_2x),
777 EXAR_DEVICE(ACCESSIO, ACCES_COM_4SM, acces_com_4x),
778 EXAR_DEVICE(ACCESSIO, ACCES_COM_8SM, acces_com_8x),
779
780
781 CONNECT_DEVICE(XR17C152, UART_2_232, pbn_connect),
782 CONNECT_DEVICE(XR17C154, UART_4_232, pbn_connect),
783 CONNECT_DEVICE(XR17C158, UART_8_232, pbn_connect),
784 CONNECT_DEVICE(XR17C152, UART_1_1, pbn_connect),
785 CONNECT_DEVICE(XR17C154, UART_2_2, pbn_connect),
786 CONNECT_DEVICE(XR17C158, UART_4_4, pbn_connect),
787 CONNECT_DEVICE(XR17C152, UART_2, pbn_connect),
788 CONNECT_DEVICE(XR17C154, UART_4, pbn_connect),
789 CONNECT_DEVICE(XR17C158, UART_8, pbn_connect),
790 CONNECT_DEVICE(XR17C152, UART_2_485, pbn_connect),
791 CONNECT_DEVICE(XR17C154, UART_4_485, pbn_connect),
792 CONNECT_DEVICE(XR17C158, UART_8_485, pbn_connect),
793
794 IBM_DEVICE(XR17C152, SATURN_SERIAL_ONE_PORT, pbn_exar_ibm_saturn),
795
796 /* Exar Corp. XR17C15[248] Dual/Quad/Octal UART */
797 EXAR_DEVICE(EXAR, EXAR_XR17C152, pbn_exar_XR17C15x),
798 EXAR_DEVICE(EXAR, EXAR_XR17C154, pbn_exar_XR17C15x),
799 EXAR_DEVICE(EXAR, EXAR_XR17C158, pbn_exar_XR17C15x),
800
801 /* Exar Corp. XR17V[48]35[248] Dual/Quad/Octal/Hexa PCIe UARTs */
802 EXAR_DEVICE(EXAR, EXAR_XR17V352, pbn_exar_XR17V35x),
803 EXAR_DEVICE(EXAR, EXAR_XR17V354, pbn_exar_XR17V35x),
804 EXAR_DEVICE(EXAR, EXAR_XR17V358, pbn_exar_XR17V35x),
805 EXAR_DEVICE(EXAR, EXAR_XR17V4358, pbn_exar_XR17V4358),
806 EXAR_DEVICE(EXAR, EXAR_XR17V8358, pbn_exar_XR17V8358),
807 EXAR_DEVICE(COMMTECH, COMMTECH_4222PCIE, pbn_exar_XR17V35x),
808 EXAR_DEVICE(COMMTECH, COMMTECH_4224PCIE, pbn_exar_XR17V35x),
809 EXAR_DEVICE(COMMTECH, COMMTECH_4228PCIE, pbn_exar_XR17V35x),
810
811 EXAR_DEVICE(COMMTECH, COMMTECH_4222PCI335, pbn_fastcom335_2),
812 EXAR_DEVICE(COMMTECH, COMMTECH_4224PCI335, pbn_fastcom335_4),
813 EXAR_DEVICE(COMMTECH, COMMTECH_2324PCI335, pbn_fastcom335_4),
814 EXAR_DEVICE(COMMTECH, COMMTECH_2328PCI335, pbn_fastcom335_8),
815 { 0, }
816 };
817 MODULE_DEVICE_TABLE(pci, exar_pci_tbl);
818
819 static struct pci_driver exar_pci_driver = {
820 .name = "exar_serial",
821 .probe = exar_pci_probe,
822 .remove = exar_pci_remove,
823 .driver = {
824 .pm = &exar_pci_pm,
825 },
826 .id_table = exar_pci_tbl,
827 };
828 module_pci_driver(exar_pci_driver);
829
830 MODULE_LICENSE("GPL");
831 MODULE_DESCRIPTION("Exar Serial Driver");
832 MODULE_AUTHOR("Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>");
Linux with added FPC-III support