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Commit | Line | Data |
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f6544418 | 1 | /* |
003236d9 | 2 | * Maxim (Dallas) MAX3107/8/9, MAX14830 serial driver |
f6544418 | 3 | * |
e97e1556 | 4 | * Copyright (C) 2012-2014 Alexander Shiyan <shc_work@mail.ru> |
f6544418 AS |
5 | * |
6 | * Based on max3100.c, by Christian Pellegrin <chripell@evolware.org> | |
7 | * Based on max3110.c, by Feng Tang <feng.tang@intel.com> | |
8 | * Based on max3107.c, by Aavamobile | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | */ | |
15 | ||
10d8b34a | 16 | #include <linux/bitops.h> |
d3a8a252 | 17 | #include <linux/clk.h> |
5f529049 AS |
18 | #include <linux/delay.h> |
19 | #include <linux/device.h> | |
20 | #include <linux/gpio.h> | |
21 | #include <linux/module.h> | |
58afc909 AS |
22 | #include <linux/of.h> |
23 | #include <linux/of_device.h> | |
5f529049 | 24 | #include <linux/regmap.h> |
f6544418 AS |
25 | #include <linux/serial_core.h> |
26 | #include <linux/serial.h> | |
27 | #include <linux/tty.h> | |
28 | #include <linux/tty_flip.h> | |
1456dad9 | 29 | #include <linux/spi/spi.h> |
58dea357 | 30 | #include <linux/uaccess.h> |
10d8b34a | 31 | |
10d8b34a | 32 | #define MAX310X_NAME "max310x" |
f6544418 AS |
33 | #define MAX310X_MAJOR 204 |
34 | #define MAX310X_MINOR 209 | |
35 | ||
36 | /* MAX310X register definitions */ | |
37 | #define MAX310X_RHR_REG (0x00) /* RX FIFO */ | |
38 | #define MAX310X_THR_REG (0x00) /* TX FIFO */ | |
39 | #define MAX310X_IRQEN_REG (0x01) /* IRQ enable */ | |
40 | #define MAX310X_IRQSTS_REG (0x02) /* IRQ status */ | |
41 | #define MAX310X_LSR_IRQEN_REG (0x03) /* LSR IRQ enable */ | |
42 | #define MAX310X_LSR_IRQSTS_REG (0x04) /* LSR IRQ status */ | |
10d8b34a AS |
43 | #define MAX310X_REG_05 (0x05) |
44 | #define MAX310X_SPCHR_IRQEN_REG MAX310X_REG_05 /* Special char IRQ en */ | |
f6544418 AS |
45 | #define MAX310X_SPCHR_IRQSTS_REG (0x06) /* Special char IRQ status */ |
46 | #define MAX310X_STS_IRQEN_REG (0x07) /* Status IRQ enable */ | |
47 | #define MAX310X_STS_IRQSTS_REG (0x08) /* Status IRQ status */ | |
48 | #define MAX310X_MODE1_REG (0x09) /* MODE1 */ | |
49 | #define MAX310X_MODE2_REG (0x0a) /* MODE2 */ | |
50 | #define MAX310X_LCR_REG (0x0b) /* LCR */ | |
51 | #define MAX310X_RXTO_REG (0x0c) /* RX timeout */ | |
52 | #define MAX310X_HDPIXDELAY_REG (0x0d) /* Auto transceiver delays */ | |
53 | #define MAX310X_IRDA_REG (0x0e) /* IRDA settings */ | |
54 | #define MAX310X_FLOWLVL_REG (0x0f) /* Flow control levels */ | |
55 | #define MAX310X_FIFOTRIGLVL_REG (0x10) /* FIFO IRQ trigger levels */ | |
56 | #define MAX310X_TXFIFOLVL_REG (0x11) /* TX FIFO level */ | |
57 | #define MAX310X_RXFIFOLVL_REG (0x12) /* RX FIFO level */ | |
58 | #define MAX310X_FLOWCTRL_REG (0x13) /* Flow control */ | |
59 | #define MAX310X_XON1_REG (0x14) /* XON1 character */ | |
60 | #define MAX310X_XON2_REG (0x15) /* XON2 character */ | |
61 | #define MAX310X_XOFF1_REG (0x16) /* XOFF1 character */ | |
62 | #define MAX310X_XOFF2_REG (0x17) /* XOFF2 character */ | |
63 | #define MAX310X_GPIOCFG_REG (0x18) /* GPIO config */ | |
64 | #define MAX310X_GPIODATA_REG (0x19) /* GPIO data */ | |
65 | #define MAX310X_PLLCFG_REG (0x1a) /* PLL config */ | |
66 | #define MAX310X_BRGCFG_REG (0x1b) /* Baud rate generator conf */ | |
67 | #define MAX310X_BRGDIVLSB_REG (0x1c) /* Baud rate divisor LSB */ | |
68 | #define MAX310X_BRGDIVMSB_REG (0x1d) /* Baud rate divisor MSB */ | |
69 | #define MAX310X_CLKSRC_REG (0x1e) /* Clock source */ | |
10d8b34a AS |
70 | #define MAX310X_REG_1F (0x1f) |
71 | ||
72 | #define MAX310X_REVID_REG MAX310X_REG_1F /* Revision ID */ | |
73 | ||
74 | #define MAX310X_GLOBALIRQ_REG MAX310X_REG_1F /* Global IRQ (RO) */ | |
75 | #define MAX310X_GLOBALCMD_REG MAX310X_REG_1F /* Global Command (WO) */ | |
76 | ||
77 | /* Extended registers */ | |
78 | #define MAX310X_REVID_EXTREG MAX310X_REG_05 /* Revision ID */ | |
f6544418 AS |
79 | |
80 | /* IRQ register bits */ | |
81 | #define MAX310X_IRQ_LSR_BIT (1 << 0) /* LSR interrupt */ | |
82 | #define MAX310X_IRQ_SPCHR_BIT (1 << 1) /* Special char interrupt */ | |
83 | #define MAX310X_IRQ_STS_BIT (1 << 2) /* Status interrupt */ | |
84 | #define MAX310X_IRQ_RXFIFO_BIT (1 << 3) /* RX FIFO interrupt */ | |
85 | #define MAX310X_IRQ_TXFIFO_BIT (1 << 4) /* TX FIFO interrupt */ | |
86 | #define MAX310X_IRQ_TXEMPTY_BIT (1 << 5) /* TX FIFO empty interrupt */ | |
87 | #define MAX310X_IRQ_RXEMPTY_BIT (1 << 6) /* RX FIFO empty interrupt */ | |
88 | #define MAX310X_IRQ_CTS_BIT (1 << 7) /* CTS interrupt */ | |
89 | ||
90 | /* LSR register bits */ | |
91 | #define MAX310X_LSR_RXTO_BIT (1 << 0) /* RX timeout */ | |
92 | #define MAX310X_LSR_RXOVR_BIT (1 << 1) /* RX overrun */ | |
93 | #define MAX310X_LSR_RXPAR_BIT (1 << 2) /* RX parity error */ | |
94 | #define MAX310X_LSR_FRERR_BIT (1 << 3) /* Frame error */ | |
95 | #define MAX310X_LSR_RXBRK_BIT (1 << 4) /* RX break */ | |
96 | #define MAX310X_LSR_RXNOISE_BIT (1 << 5) /* RX noise */ | |
97 | #define MAX310X_LSR_CTS_BIT (1 << 7) /* CTS pin state */ | |
98 | ||
99 | /* Special character register bits */ | |
100 | #define MAX310X_SPCHR_XON1_BIT (1 << 0) /* XON1 character */ | |
101 | #define MAX310X_SPCHR_XON2_BIT (1 << 1) /* XON2 character */ | |
102 | #define MAX310X_SPCHR_XOFF1_BIT (1 << 2) /* XOFF1 character */ | |
103 | #define MAX310X_SPCHR_XOFF2_BIT (1 << 3) /* XOFF2 character */ | |
104 | #define MAX310X_SPCHR_BREAK_BIT (1 << 4) /* RX break */ | |
105 | #define MAX310X_SPCHR_MULTIDROP_BIT (1 << 5) /* 9-bit multidrop addr char */ | |
106 | ||
107 | /* Status register bits */ | |
108 | #define MAX310X_STS_GPIO0_BIT (1 << 0) /* GPIO 0 interrupt */ | |
109 | #define MAX310X_STS_GPIO1_BIT (1 << 1) /* GPIO 1 interrupt */ | |
110 | #define MAX310X_STS_GPIO2_BIT (1 << 2) /* GPIO 2 interrupt */ | |
111 | #define MAX310X_STS_GPIO3_BIT (1 << 3) /* GPIO 3 interrupt */ | |
112 | #define MAX310X_STS_CLKREADY_BIT (1 << 5) /* Clock ready */ | |
113 | #define MAX310X_STS_SLEEP_BIT (1 << 6) /* Sleep interrupt */ | |
114 | ||
115 | /* MODE1 register bits */ | |
116 | #define MAX310X_MODE1_RXDIS_BIT (1 << 0) /* RX disable */ | |
117 | #define MAX310X_MODE1_TXDIS_BIT (1 << 1) /* TX disable */ | |
118 | #define MAX310X_MODE1_TXHIZ_BIT (1 << 2) /* TX pin three-state */ | |
119 | #define MAX310X_MODE1_RTSHIZ_BIT (1 << 3) /* RTS pin three-state */ | |
120 | #define MAX310X_MODE1_TRNSCVCTRL_BIT (1 << 4) /* Transceiver ctrl enable */ | |
121 | #define MAX310X_MODE1_FORCESLEEP_BIT (1 << 5) /* Force sleep mode */ | |
122 | #define MAX310X_MODE1_AUTOSLEEP_BIT (1 << 6) /* Auto sleep enable */ | |
123 | #define MAX310X_MODE1_IRQSEL_BIT (1 << 7) /* IRQ pin enable */ | |
124 | ||
125 | /* MODE2 register bits */ | |
126 | #define MAX310X_MODE2_RST_BIT (1 << 0) /* Chip reset */ | |
127 | #define MAX310X_MODE2_FIFORST_BIT (1 << 1) /* FIFO reset */ | |
128 | #define MAX310X_MODE2_RXTRIGINV_BIT (1 << 2) /* RX FIFO INT invert */ | |
129 | #define MAX310X_MODE2_RXEMPTINV_BIT (1 << 3) /* RX FIFO empty INT invert */ | |
130 | #define MAX310X_MODE2_SPCHR_BIT (1 << 4) /* Special chr detect enable */ | |
131 | #define MAX310X_MODE2_LOOPBACK_BIT (1 << 5) /* Internal loopback enable */ | |
132 | #define MAX310X_MODE2_MULTIDROP_BIT (1 << 6) /* 9-bit multidrop enable */ | |
133 | #define MAX310X_MODE2_ECHOSUPR_BIT (1 << 7) /* ECHO suppression enable */ | |
134 | ||
135 | /* LCR register bits */ | |
136 | #define MAX310X_LCR_LENGTH0_BIT (1 << 0) /* Word length bit 0 */ | |
137 | #define MAX310X_LCR_LENGTH1_BIT (1 << 1) /* Word length bit 1 | |
138 | * | |
139 | * Word length bits table: | |
140 | * 00 -> 5 bit words | |
141 | * 01 -> 6 bit words | |
142 | * 10 -> 7 bit words | |
143 | * 11 -> 8 bit words | |
144 | */ | |
145 | #define MAX310X_LCR_STOPLEN_BIT (1 << 2) /* STOP length bit | |
146 | * | |
147 | * STOP length bit table: | |
148 | * 0 -> 1 stop bit | |
149 | * 1 -> 1-1.5 stop bits if | |
150 | * word length is 5, | |
151 | * 2 stop bits otherwise | |
152 | */ | |
153 | #define MAX310X_LCR_PARITY_BIT (1 << 3) /* Parity bit enable */ | |
154 | #define MAX310X_LCR_EVENPARITY_BIT (1 << 4) /* Even parity bit enable */ | |
155 | #define MAX310X_LCR_FORCEPARITY_BIT (1 << 5) /* 9-bit multidrop parity */ | |
156 | #define MAX310X_LCR_TXBREAK_BIT (1 << 6) /* TX break enable */ | |
157 | #define MAX310X_LCR_RTS_BIT (1 << 7) /* RTS pin control */ | |
158 | #define MAX310X_LCR_WORD_LEN_5 (0x00) | |
159 | #define MAX310X_LCR_WORD_LEN_6 (0x01) | |
160 | #define MAX310X_LCR_WORD_LEN_7 (0x02) | |
161 | #define MAX310X_LCR_WORD_LEN_8 (0x03) | |
162 | ||
163 | /* IRDA register bits */ | |
164 | #define MAX310X_IRDA_IRDAEN_BIT (1 << 0) /* IRDA mode enable */ | |
165 | #define MAX310X_IRDA_SIR_BIT (1 << 1) /* SIR mode enable */ | |
f6544418 AS |
166 | |
167 | /* Flow control trigger level register masks */ | |
168 | #define MAX310X_FLOWLVL_HALT_MASK (0x000f) /* Flow control halt level */ | |
169 | #define MAX310X_FLOWLVL_RES_MASK (0x00f0) /* Flow control resume level */ | |
170 | #define MAX310X_FLOWLVL_HALT(words) ((words / 8) & 0x0f) | |
171 | #define MAX310X_FLOWLVL_RES(words) (((words / 8) & 0x0f) << 4) | |
172 | ||
173 | /* FIFO interrupt trigger level register masks */ | |
174 | #define MAX310X_FIFOTRIGLVL_TX_MASK (0x0f) /* TX FIFO trigger level */ | |
175 | #define MAX310X_FIFOTRIGLVL_RX_MASK (0xf0) /* RX FIFO trigger level */ | |
176 | #define MAX310X_FIFOTRIGLVL_TX(words) ((words / 8) & 0x0f) | |
177 | #define MAX310X_FIFOTRIGLVL_RX(words) (((words / 8) & 0x0f) << 4) | |
178 | ||
179 | /* Flow control register bits */ | |
180 | #define MAX310X_FLOWCTRL_AUTORTS_BIT (1 << 0) /* Auto RTS flow ctrl enable */ | |
181 | #define MAX310X_FLOWCTRL_AUTOCTS_BIT (1 << 1) /* Auto CTS flow ctrl enable */ | |
182 | #define MAX310X_FLOWCTRL_GPIADDR_BIT (1 << 2) /* Enables that GPIO inputs | |
183 | * are used in conjunction with | |
184 | * XOFF2 for definition of | |
185 | * special character */ | |
186 | #define MAX310X_FLOWCTRL_SWFLOWEN_BIT (1 << 3) /* Auto SW flow ctrl enable */ | |
187 | #define MAX310X_FLOWCTRL_SWFLOW0_BIT (1 << 4) /* SWFLOW bit 0 */ | |
188 | #define MAX310X_FLOWCTRL_SWFLOW1_BIT (1 << 5) /* SWFLOW bit 1 | |
189 | * | |
190 | * SWFLOW bits 1 & 0 table: | |
191 | * 00 -> no transmitter flow | |
192 | * control | |
193 | * 01 -> receiver compares | |
194 | * XON2 and XOFF2 | |
195 | * and controls | |
196 | * transmitter | |
197 | * 10 -> receiver compares | |
198 | * XON1 and XOFF1 | |
199 | * and controls | |
200 | * transmitter | |
201 | * 11 -> receiver compares | |
202 | * XON1, XON2, XOFF1 and | |
203 | * XOFF2 and controls | |
204 | * transmitter | |
205 | */ | |
206 | #define MAX310X_FLOWCTRL_SWFLOW2_BIT (1 << 6) /* SWFLOW bit 2 */ | |
207 | #define MAX310X_FLOWCTRL_SWFLOW3_BIT (1 << 7) /* SWFLOW bit 3 | |
208 | * | |
209 | * SWFLOW bits 3 & 2 table: | |
210 | * 00 -> no received flow | |
211 | * control | |
212 | * 01 -> transmitter generates | |
213 | * XON2 and XOFF2 | |
214 | * 10 -> transmitter generates | |
215 | * XON1 and XOFF1 | |
216 | * 11 -> transmitter generates | |
217 | * XON1, XON2, XOFF1 and | |
218 | * XOFF2 | |
219 | */ | |
220 | ||
f6544418 AS |
221 | /* PLL configuration register masks */ |
222 | #define MAX310X_PLLCFG_PREDIV_MASK (0x3f) /* PLL predivision value */ | |
223 | #define MAX310X_PLLCFG_PLLFACTOR_MASK (0xc0) /* PLL multiplication factor */ | |
224 | ||
225 | /* Baud rate generator configuration register bits */ | |
226 | #define MAX310X_BRGCFG_2XMODE_BIT (1 << 4) /* Double baud rate */ | |
227 | #define MAX310X_BRGCFG_4XMODE_BIT (1 << 5) /* Quadruple baud rate */ | |
228 | ||
229 | /* Clock source register bits */ | |
230 | #define MAX310X_CLKSRC_CRYST_BIT (1 << 1) /* Crystal osc enable */ | |
231 | #define MAX310X_CLKSRC_PLL_BIT (1 << 2) /* PLL enable */ | |
232 | #define MAX310X_CLKSRC_PLLBYP_BIT (1 << 3) /* PLL bypass */ | |
233 | #define MAX310X_CLKSRC_EXTCLK_BIT (1 << 4) /* External clock enable */ | |
234 | #define MAX310X_CLKSRC_CLK2RTS_BIT (1 << 7) /* Baud clk to RTS pin */ | |
235 | ||
10d8b34a AS |
236 | /* Global commands */ |
237 | #define MAX310X_EXTREG_ENBL (0xce) | |
238 | #define MAX310X_EXTREG_DSBL (0xcd) | |
239 | ||
f6544418 AS |
240 | /* Misc definitions */ |
241 | #define MAX310X_FIFO_SIZE (128) | |
10d8b34a | 242 | #define MAX310x_REV_MASK (0xfc) |
f6544418 AS |
243 | |
244 | /* MAX3107 specific */ | |
245 | #define MAX3107_REV_ID (0xa0) | |
10d8b34a | 246 | |
21fc509f AS |
247 | /* MAX3109 specific */ |
248 | #define MAX3109_REV_ID (0xc0) | |
249 | ||
003236d9 AS |
250 | /* MAX14830 specific */ |
251 | #define MAX14830_BRGCFG_CLKDIS_BIT (1 << 6) /* Clock Disable */ | |
252 | #define MAX14830_REV_ID (0xb0) | |
253 | ||
10d8b34a AS |
254 | struct max310x_devtype { |
255 | char name[9]; | |
256 | int nr; | |
257 | int (*detect)(struct device *); | |
258 | void (*power)(struct uart_port *, int); | |
f6544418 AS |
259 | }; |
260 | ||
10d8b34a | 261 | struct max310x_one { |
f6544418 | 262 | struct uart_port port; |
10d8b34a | 263 | struct work_struct tx_work; |
e7b8a3ce | 264 | struct work_struct md_work; |
10d8b34a | 265 | }; |
f6544418 | 266 | |
10d8b34a AS |
267 | struct max310x_port { |
268 | struct uart_driver uart; | |
269 | struct max310x_devtype *devtype; | |
270 | struct regmap *regmap; | |
10d8b34a | 271 | struct mutex mutex; |
d3a8a252 | 272 | struct clk *clk; |
f6544418 AS |
273 | #ifdef CONFIG_GPIOLIB |
274 | struct gpio_chip gpio; | |
275 | #endif | |
10d8b34a AS |
276 | struct max310x_one p[0]; |
277 | }; | |
f6544418 | 278 | |
10d8b34a AS |
279 | static u8 max310x_port_read(struct uart_port *port, u8 reg) |
280 | { | |
281 | struct max310x_port *s = dev_get_drvdata(port->dev); | |
282 | unsigned int val = 0; | |
f6544418 | 283 | |
10d8b34a | 284 | regmap_read(s->regmap, port->iobase + reg, &val); |
f6544418 | 285 | |
10d8b34a AS |
286 | return val; |
287 | } | |
f6544418 | 288 | |
10d8b34a AS |
289 | static void max310x_port_write(struct uart_port *port, u8 reg, u8 val) |
290 | { | |
291 | struct max310x_port *s = dev_get_drvdata(port->dev); | |
292 | ||
293 | regmap_write(s->regmap, port->iobase + reg, val); | |
294 | } | |
295 | ||
296 | static void max310x_port_update(struct uart_port *port, u8 reg, u8 mask, u8 val) | |
297 | { | |
298 | struct max310x_port *s = dev_get_drvdata(port->dev); | |
299 | ||
300 | regmap_update_bits(s->regmap, port->iobase + reg, mask, val); | |
301 | } | |
302 | ||
303 | static int max3107_detect(struct device *dev) | |
304 | { | |
305 | struct max310x_port *s = dev_get_drvdata(dev); | |
306 | unsigned int val = 0; | |
307 | int ret; | |
308 | ||
309 | ret = regmap_read(s->regmap, MAX310X_REVID_REG, &val); | |
310 | if (ret) | |
311 | return ret; | |
312 | ||
313 | if (((val & MAX310x_REV_MASK) != MAX3107_REV_ID)) { | |
314 | dev_err(dev, | |
315 | "%s ID 0x%02x does not match\n", s->devtype->name, val); | |
316 | return -ENODEV; | |
317 | } | |
318 | ||
319 | return 0; | |
320 | } | |
321 | ||
322 | static int max3108_detect(struct device *dev) | |
323 | { | |
324 | struct max310x_port *s = dev_get_drvdata(dev); | |
325 | unsigned int val = 0; | |
326 | int ret; | |
327 | ||
328 | /* MAX3108 have not REV ID register, we just check default value | |
329 | * from clocksource register to make sure everything works. | |
330 | */ | |
331 | ret = regmap_read(s->regmap, MAX310X_CLKSRC_REG, &val); | |
332 | if (ret) | |
333 | return ret; | |
334 | ||
335 | if (val != (MAX310X_CLKSRC_EXTCLK_BIT | MAX310X_CLKSRC_PLLBYP_BIT)) { | |
336 | dev_err(dev, "%s not present\n", s->devtype->name); | |
337 | return -ENODEV; | |
338 | } | |
339 | ||
340 | return 0; | |
341 | } | |
342 | ||
21fc509f AS |
343 | static int max3109_detect(struct device *dev) |
344 | { | |
345 | struct max310x_port *s = dev_get_drvdata(dev); | |
346 | unsigned int val = 0; | |
347 | int ret; | |
348 | ||
349 | ret = regmap_read(s->regmap, MAX310X_REVID_REG, &val); | |
350 | if (ret) | |
351 | return ret; | |
352 | ||
353 | if (((val & MAX310x_REV_MASK) != MAX3109_REV_ID)) { | |
354 | dev_err(dev, | |
355 | "%s ID 0x%02x does not match\n", s->devtype->name, val); | |
356 | return -ENODEV; | |
357 | } | |
358 | ||
359 | return 0; | |
360 | } | |
361 | ||
10d8b34a AS |
362 | static void max310x_power(struct uart_port *port, int on) |
363 | { | |
364 | max310x_port_update(port, MAX310X_MODE1_REG, | |
365 | MAX310X_MODE1_FORCESLEEP_BIT, | |
366 | on ? 0 : MAX310X_MODE1_FORCESLEEP_BIT); | |
367 | if (on) | |
368 | msleep(50); | |
369 | } | |
370 | ||
003236d9 AS |
371 | static int max14830_detect(struct device *dev) |
372 | { | |
373 | struct max310x_port *s = dev_get_drvdata(dev); | |
374 | unsigned int val = 0; | |
375 | int ret; | |
376 | ||
377 | ret = regmap_write(s->regmap, MAX310X_GLOBALCMD_REG, | |
378 | MAX310X_EXTREG_ENBL); | |
379 | if (ret) | |
380 | return ret; | |
381 | ||
382 | regmap_read(s->regmap, MAX310X_REVID_EXTREG, &val); | |
383 | regmap_write(s->regmap, MAX310X_GLOBALCMD_REG, MAX310X_EXTREG_DSBL); | |
384 | if (((val & MAX310x_REV_MASK) != MAX14830_REV_ID)) { | |
385 | dev_err(dev, | |
386 | "%s ID 0x%02x does not match\n", s->devtype->name, val); | |
387 | return -ENODEV; | |
388 | } | |
389 | ||
390 | return 0; | |
391 | } | |
392 | ||
393 | static void max14830_power(struct uart_port *port, int on) | |
394 | { | |
395 | max310x_port_update(port, MAX310X_BRGCFG_REG, | |
396 | MAX14830_BRGCFG_CLKDIS_BIT, | |
397 | on ? 0 : MAX14830_BRGCFG_CLKDIS_BIT); | |
398 | if (on) | |
399 | msleep(50); | |
400 | } | |
401 | ||
10d8b34a AS |
402 | static const struct max310x_devtype max3107_devtype = { |
403 | .name = "MAX3107", | |
404 | .nr = 1, | |
405 | .detect = max3107_detect, | |
406 | .power = max310x_power, | |
f6544418 AS |
407 | }; |
408 | ||
10d8b34a AS |
409 | static const struct max310x_devtype max3108_devtype = { |
410 | .name = "MAX3108", | |
411 | .nr = 1, | |
412 | .detect = max3108_detect, | |
413 | .power = max310x_power, | |
414 | }; | |
415 | ||
21fc509f AS |
416 | static const struct max310x_devtype max3109_devtype = { |
417 | .name = "MAX3109", | |
418 | .nr = 2, | |
419 | .detect = max3109_detect, | |
420 | .power = max310x_power, | |
421 | }; | |
422 | ||
003236d9 AS |
423 | static const struct max310x_devtype max14830_devtype = { |
424 | .name = "MAX14830", | |
425 | .nr = 4, | |
426 | .detect = max14830_detect, | |
427 | .power = max14830_power, | |
428 | }; | |
429 | ||
10d8b34a | 430 | static bool max310x_reg_writeable(struct device *dev, unsigned int reg) |
f6544418 | 431 | { |
10d8b34a | 432 | switch (reg & 0x1f) { |
f6544418 AS |
433 | case MAX310X_IRQSTS_REG: |
434 | case MAX310X_LSR_IRQSTS_REG: | |
435 | case MAX310X_SPCHR_IRQSTS_REG: | |
436 | case MAX310X_STS_IRQSTS_REG: | |
437 | case MAX310X_TXFIFOLVL_REG: | |
438 | case MAX310X_RXFIFOLVL_REG: | |
f6544418 AS |
439 | return false; |
440 | default: | |
441 | break; | |
442 | } | |
443 | ||
444 | return true; | |
445 | } | |
446 | ||
447 | static bool max310x_reg_volatile(struct device *dev, unsigned int reg) | |
448 | { | |
10d8b34a | 449 | switch (reg & 0x1f) { |
f6544418 AS |
450 | case MAX310X_RHR_REG: |
451 | case MAX310X_IRQSTS_REG: | |
452 | case MAX310X_LSR_IRQSTS_REG: | |
453 | case MAX310X_SPCHR_IRQSTS_REG: | |
454 | case MAX310X_STS_IRQSTS_REG: | |
455 | case MAX310X_TXFIFOLVL_REG: | |
456 | case MAX310X_RXFIFOLVL_REG: | |
457 | case MAX310X_GPIODATA_REG: | |
10d8b34a AS |
458 | case MAX310X_BRGDIVLSB_REG: |
459 | case MAX310X_REG_05: | |
460 | case MAX310X_REG_1F: | |
f6544418 AS |
461 | return true; |
462 | default: | |
463 | break; | |
464 | } | |
465 | ||
466 | return false; | |
467 | } | |
468 | ||
469 | static bool max310x_reg_precious(struct device *dev, unsigned int reg) | |
470 | { | |
10d8b34a | 471 | switch (reg & 0x1f) { |
f6544418 AS |
472 | case MAX310X_RHR_REG: |
473 | case MAX310X_IRQSTS_REG: | |
474 | case MAX310X_SPCHR_IRQSTS_REG: | |
475 | case MAX310X_STS_IRQSTS_REG: | |
476 | return true; | |
477 | default: | |
478 | break; | |
479 | } | |
480 | ||
481 | return false; | |
482 | } | |
483 | ||
e97e1556 | 484 | static int max310x_set_baud(struct uart_port *port, int baud) |
f6544418 | 485 | { |
e97e1556 | 486 | unsigned int mode = 0, clk = port->uartclk, div = clk / baud; |
f6544418 | 487 | |
e97e1556 AS |
488 | /* Check for minimal value for divider */ |
489 | if (div < 16) | |
490 | div = 16; | |
491 | ||
492 | if (clk % baud && (div / 16) < 0x8000) { | |
f6544418 AS |
493 | /* Mode x2 */ |
494 | mode = MAX310X_BRGCFG_2XMODE_BIT; | |
e97e1556 AS |
495 | clk = port->uartclk * 2; |
496 | div = clk / baud; | |
497 | ||
498 | if (clk % baud && (div / 16) < 0x8000) { | |
499 | /* Mode x4 */ | |
500 | mode = MAX310X_BRGCFG_4XMODE_BIT; | |
501 | clk = port->uartclk * 4; | |
502 | div = clk / baud; | |
503 | } | |
f6544418 AS |
504 | } |
505 | ||
10d8b34a AS |
506 | max310x_port_write(port, MAX310X_BRGDIVMSB_REG, (div / 16) >> 8); |
507 | max310x_port_write(port, MAX310X_BRGDIVLSB_REG, div / 16); | |
508 | max310x_port_write(port, MAX310X_BRGCFG_REG, (div % 16) | mode); | |
e97e1556 AS |
509 | |
510 | return DIV_ROUND_CLOSEST(clk, div); | |
f6544418 AS |
511 | } |
512 | ||
9671f099 | 513 | static int max310x_update_best_err(unsigned long f, long *besterr) |
f6544418 AS |
514 | { |
515 | /* Use baudrate 115200 for calculate error */ | |
516 | long err = f % (115200 * 16); | |
517 | ||
518 | if ((*besterr < 0) || (*besterr > err)) { | |
519 | *besterr = err; | |
520 | return 0; | |
521 | } | |
522 | ||
523 | return 1; | |
524 | } | |
525 | ||
d3a8a252 AS |
526 | static int max310x_set_ref_clk(struct max310x_port *s, unsigned long freq, |
527 | bool xtal) | |
f6544418 AS |
528 | { |
529 | unsigned int div, clksrc, pllcfg = 0; | |
530 | long besterr = -1; | |
d3a8a252 | 531 | unsigned long fdiv, fmul, bestfreq = freq; |
f6544418 AS |
532 | |
533 | /* First, update error without PLL */ | |
d3a8a252 | 534 | max310x_update_best_err(freq, &besterr); |
f6544418 AS |
535 | |
536 | /* Try all possible PLL dividers */ | |
537 | for (div = 1; (div <= 63) && besterr; div++) { | |
d3a8a252 | 538 | fdiv = DIV_ROUND_CLOSEST(freq, div); |
f6544418 AS |
539 | |
540 | /* Try multiplier 6 */ | |
541 | fmul = fdiv * 6; | |
542 | if ((fdiv >= 500000) && (fdiv <= 800000)) | |
543 | if (!max310x_update_best_err(fmul, &besterr)) { | |
544 | pllcfg = (0 << 6) | div; | |
545 | bestfreq = fmul; | |
546 | } | |
547 | /* Try multiplier 48 */ | |
548 | fmul = fdiv * 48; | |
549 | if ((fdiv >= 850000) && (fdiv <= 1200000)) | |
550 | if (!max310x_update_best_err(fmul, &besterr)) { | |
551 | pllcfg = (1 << 6) | div; | |
552 | bestfreq = fmul; | |
553 | } | |
554 | /* Try multiplier 96 */ | |
555 | fmul = fdiv * 96; | |
556 | if ((fdiv >= 425000) && (fdiv <= 1000000)) | |
557 | if (!max310x_update_best_err(fmul, &besterr)) { | |
558 | pllcfg = (2 << 6) | div; | |
559 | bestfreq = fmul; | |
560 | } | |
561 | /* Try multiplier 144 */ | |
562 | fmul = fdiv * 144; | |
563 | if ((fdiv >= 390000) && (fdiv <= 667000)) | |
564 | if (!max310x_update_best_err(fmul, &besterr)) { | |
565 | pllcfg = (3 << 6) | div; | |
566 | bestfreq = fmul; | |
567 | } | |
568 | } | |
569 | ||
570 | /* Configure clock source */ | |
d3a8a252 | 571 | clksrc = xtal ? MAX310X_CLKSRC_CRYST_BIT : MAX310X_CLKSRC_EXTCLK_BIT; |
f6544418 AS |
572 | |
573 | /* Configure PLL */ | |
574 | if (pllcfg) { | |
575 | clksrc |= MAX310X_CLKSRC_PLL_BIT; | |
576 | regmap_write(s->regmap, MAX310X_PLLCFG_REG, pllcfg); | |
577 | } else | |
578 | clksrc |= MAX310X_CLKSRC_PLLBYP_BIT; | |
579 | ||
580 | regmap_write(s->regmap, MAX310X_CLKSRC_REG, clksrc); | |
581 | ||
10d8b34a | 582 | /* Wait for crystal */ |
d3a8a252 | 583 | if (pllcfg && xtal) |
10d8b34a | 584 | msleep(10); |
f6544418 AS |
585 | |
586 | return (int)bestfreq; | |
587 | } | |
588 | ||
10d8b34a | 589 | static void max310x_handle_rx(struct uart_port *port, unsigned int rxlen) |
f6544418 | 590 | { |
10d8b34a | 591 | unsigned int sts, ch, flag; |
f6544418 | 592 | |
10d8b34a AS |
593 | if (unlikely(rxlen >= port->fifosize)) { |
594 | dev_warn_ratelimited(port->dev, | |
595 | "Port %i: Possible RX FIFO overrun\n", | |
596 | port->line); | |
597 | port->icount.buf_overrun++; | |
f6544418 | 598 | /* Ensure sanity of RX level */ |
10d8b34a | 599 | rxlen = port->fifosize; |
f6544418 AS |
600 | } |
601 | ||
f6544418 | 602 | while (rxlen--) { |
10d8b34a AS |
603 | ch = max310x_port_read(port, MAX310X_RHR_REG); |
604 | sts = max310x_port_read(port, MAX310X_LSR_IRQSTS_REG); | |
f6544418 AS |
605 | |
606 | sts &= MAX310X_LSR_RXPAR_BIT | MAX310X_LSR_FRERR_BIT | | |
607 | MAX310X_LSR_RXOVR_BIT | MAX310X_LSR_RXBRK_BIT; | |
608 | ||
10d8b34a | 609 | port->icount.rx++; |
f6544418 AS |
610 | flag = TTY_NORMAL; |
611 | ||
612 | if (unlikely(sts)) { | |
613 | if (sts & MAX310X_LSR_RXBRK_BIT) { | |
10d8b34a AS |
614 | port->icount.brk++; |
615 | if (uart_handle_break(port)) | |
f6544418 AS |
616 | continue; |
617 | } else if (sts & MAX310X_LSR_RXPAR_BIT) | |
10d8b34a | 618 | port->icount.parity++; |
f6544418 | 619 | else if (sts & MAX310X_LSR_FRERR_BIT) |
10d8b34a | 620 | port->icount.frame++; |
f6544418 | 621 | else if (sts & MAX310X_LSR_RXOVR_BIT) |
10d8b34a | 622 | port->icount.overrun++; |
f6544418 | 623 | |
10d8b34a | 624 | sts &= port->read_status_mask; |
f6544418 AS |
625 | if (sts & MAX310X_LSR_RXBRK_BIT) |
626 | flag = TTY_BREAK; | |
627 | else if (sts & MAX310X_LSR_RXPAR_BIT) | |
628 | flag = TTY_PARITY; | |
629 | else if (sts & MAX310X_LSR_FRERR_BIT) | |
630 | flag = TTY_FRAME; | |
631 | else if (sts & MAX310X_LSR_RXOVR_BIT) | |
632 | flag = TTY_OVERRUN; | |
633 | } | |
634 | ||
10d8b34a | 635 | if (uart_handle_sysrq_char(port, ch)) |
f6544418 AS |
636 | continue; |
637 | ||
10d8b34a | 638 | if (sts & port->ignore_status_mask) |
f6544418 AS |
639 | continue; |
640 | ||
10d8b34a | 641 | uart_insert_char(port, sts, MAX310X_LSR_RXOVR_BIT, ch, flag); |
f6544418 AS |
642 | } |
643 | ||
10d8b34a | 644 | tty_flip_buffer_push(&port->state->port); |
f6544418 AS |
645 | } |
646 | ||
10d8b34a | 647 | static void max310x_handle_tx(struct uart_port *port) |
f6544418 | 648 | { |
10d8b34a AS |
649 | struct circ_buf *xmit = &port->state->xmit; |
650 | unsigned int txlen, to_send; | |
f6544418 | 651 | |
10d8b34a AS |
652 | if (unlikely(port->x_char)) { |
653 | max310x_port_write(port, MAX310X_THR_REG, port->x_char); | |
654 | port->icount.tx++; | |
655 | port->x_char = 0; | |
f6544418 AS |
656 | return; |
657 | } | |
658 | ||
10d8b34a | 659 | if (uart_circ_empty(xmit) || uart_tx_stopped(port)) |
f6544418 AS |
660 | return; |
661 | ||
662 | /* Get length of data pending in circular buffer */ | |
663 | to_send = uart_circ_chars_pending(xmit); | |
664 | if (likely(to_send)) { | |
665 | /* Limit to size of TX FIFO */ | |
10d8b34a AS |
666 | txlen = max310x_port_read(port, MAX310X_TXFIFOLVL_REG); |
667 | txlen = port->fifosize - txlen; | |
f6544418 AS |
668 | to_send = (to_send > txlen) ? txlen : to_send; |
669 | ||
f6544418 | 670 | /* Add data to send */ |
10d8b34a | 671 | port->icount.tx += to_send; |
f6544418 | 672 | while (to_send--) { |
10d8b34a AS |
673 | max310x_port_write(port, MAX310X_THR_REG, |
674 | xmit->buf[xmit->tail]); | |
f6544418 | 675 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); |
fc811472 | 676 | } |
f6544418 AS |
677 | } |
678 | ||
679 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) | |
10d8b34a | 680 | uart_write_wakeup(port); |
f6544418 AS |
681 | } |
682 | ||
10d8b34a | 683 | static void max310x_port_irq(struct max310x_port *s, int portno) |
f6544418 | 684 | { |
10d8b34a | 685 | struct uart_port *port = &s->p[portno].port; |
f6544418 | 686 | |
10d8b34a AS |
687 | do { |
688 | unsigned int ists, lsr, rxlen; | |
f6544418 | 689 | |
f6544418 | 690 | /* Read IRQ status & RX FIFO level */ |
10d8b34a AS |
691 | ists = max310x_port_read(port, MAX310X_IRQSTS_REG); |
692 | rxlen = max310x_port_read(port, MAX310X_RXFIFOLVL_REG); | |
693 | if (!ists && !rxlen) | |
f6544418 AS |
694 | break; |
695 | ||
10d8b34a AS |
696 | if (ists & MAX310X_IRQ_CTS_BIT) { |
697 | lsr = max310x_port_read(port, MAX310X_LSR_IRQSTS_REG); | |
698 | uart_handle_cts_change(port, | |
f6544418 | 699 | !!(lsr & MAX310X_LSR_CTS_BIT)); |
10d8b34a AS |
700 | } |
701 | if (rxlen) | |
702 | max310x_handle_rx(port, rxlen); | |
703 | if (ists & MAX310X_IRQ_TXEMPTY_BIT) { | |
704 | mutex_lock(&s->mutex); | |
705 | max310x_handle_tx(port); | |
706 | mutex_unlock(&s->mutex); | |
707 | } | |
708 | } while (1); | |
709 | } | |
f6544418 | 710 | |
10d8b34a AS |
711 | static irqreturn_t max310x_ist(int irq, void *dev_id) |
712 | { | |
713 | struct max310x_port *s = (struct max310x_port *)dev_id; | |
714 | ||
715 | if (s->uart.nr > 1) { | |
716 | do { | |
717 | unsigned int val = ~0; | |
718 | ||
719 | WARN_ON_ONCE(regmap_read(s->regmap, | |
720 | MAX310X_GLOBALIRQ_REG, &val)); | |
721 | val = ((1 << s->uart.nr) - 1) & ~val; | |
722 | if (!val) | |
723 | break; | |
724 | max310x_port_irq(s, fls(val) - 1); | |
725 | } while (1); | |
726 | } else | |
727 | max310x_port_irq(s, 0); | |
f6544418 AS |
728 | |
729 | return IRQ_HANDLED; | |
730 | } | |
731 | ||
732 | static void max310x_wq_proc(struct work_struct *ws) | |
733 | { | |
10d8b34a AS |
734 | struct max310x_one *one = container_of(ws, struct max310x_one, tx_work); |
735 | struct max310x_port *s = dev_get_drvdata(one->port.dev); | |
f6544418 | 736 | |
10d8b34a AS |
737 | mutex_lock(&s->mutex); |
738 | max310x_handle_tx(&one->port); | |
739 | mutex_unlock(&s->mutex); | |
f6544418 AS |
740 | } |
741 | ||
742 | static void max310x_start_tx(struct uart_port *port) | |
743 | { | |
10d8b34a | 744 | struct max310x_one *one = container_of(port, struct max310x_one, port); |
f6544418 | 745 | |
10d8b34a AS |
746 | if (!work_pending(&one->tx_work)) |
747 | schedule_work(&one->tx_work); | |
f6544418 AS |
748 | } |
749 | ||
750 | static unsigned int max310x_tx_empty(struct uart_port *port) | |
751 | { | |
10d8b34a | 752 | unsigned int lvl, sts; |
f6544418 | 753 | |
10d8b34a AS |
754 | lvl = max310x_port_read(port, MAX310X_TXFIFOLVL_REG); |
755 | sts = max310x_port_read(port, MAX310X_IRQSTS_REG); | |
f6544418 | 756 | |
10d8b34a | 757 | return ((sts & MAX310X_IRQ_TXEMPTY_BIT) && !lvl) ? TIOCSER_TEMT : 0; |
f6544418 AS |
758 | } |
759 | ||
760 | static unsigned int max310x_get_mctrl(struct uart_port *port) | |
761 | { | |
762 | /* DCD and DSR are not wired and CTS/RTS is handled automatically | |
763 | * so just indicate DSR and CAR asserted | |
764 | */ | |
765 | return TIOCM_DSR | TIOCM_CAR; | |
766 | } | |
767 | ||
e7b8a3ce AS |
768 | static void max310x_md_proc(struct work_struct *ws) |
769 | { | |
770 | struct max310x_one *one = container_of(ws, struct max310x_one, md_work); | |
771 | ||
772 | max310x_port_update(&one->port, MAX310X_MODE2_REG, | |
773 | MAX310X_MODE2_LOOPBACK_BIT, | |
774 | (one->port.mctrl & TIOCM_LOOP) ? | |
775 | MAX310X_MODE2_LOOPBACK_BIT : 0); | |
776 | } | |
777 | ||
f6544418 AS |
778 | static void max310x_set_mctrl(struct uart_port *port, unsigned int mctrl) |
779 | { | |
e7b8a3ce AS |
780 | struct max310x_one *one = container_of(port, struct max310x_one, port); |
781 | ||
782 | schedule_work(&one->md_work); | |
f6544418 AS |
783 | } |
784 | ||
785 | static void max310x_break_ctl(struct uart_port *port, int break_state) | |
786 | { | |
10d8b34a AS |
787 | max310x_port_update(port, MAX310X_LCR_REG, |
788 | MAX310X_LCR_TXBREAK_BIT, | |
789 | break_state ? MAX310X_LCR_TXBREAK_BIT : 0); | |
f6544418 AS |
790 | } |
791 | ||
792 | static void max310x_set_termios(struct uart_port *port, | |
793 | struct ktermios *termios, | |
794 | struct ktermios *old) | |
795 | { | |
f6544418 AS |
796 | unsigned int lcr, flow = 0; |
797 | int baud; | |
798 | ||
f6544418 AS |
799 | /* Mask termios capabilities we don't support */ |
800 | termios->c_cflag &= ~CMSPAR; | |
f6544418 AS |
801 | |
802 | /* Word size */ | |
803 | switch (termios->c_cflag & CSIZE) { | |
804 | case CS5: | |
805 | lcr = MAX310X_LCR_WORD_LEN_5; | |
806 | break; | |
807 | case CS6: | |
808 | lcr = MAX310X_LCR_WORD_LEN_6; | |
809 | break; | |
810 | case CS7: | |
811 | lcr = MAX310X_LCR_WORD_LEN_7; | |
812 | break; | |
813 | case CS8: | |
814 | default: | |
815 | lcr = MAX310X_LCR_WORD_LEN_8; | |
816 | break; | |
817 | } | |
818 | ||
819 | /* Parity */ | |
820 | if (termios->c_cflag & PARENB) { | |
821 | lcr |= MAX310X_LCR_PARITY_BIT; | |
822 | if (!(termios->c_cflag & PARODD)) | |
823 | lcr |= MAX310X_LCR_EVENPARITY_BIT; | |
824 | } | |
825 | ||
826 | /* Stop bits */ | |
827 | if (termios->c_cflag & CSTOPB) | |
828 | lcr |= MAX310X_LCR_STOPLEN_BIT; /* 2 stops */ | |
829 | ||
830 | /* Update LCR register */ | |
10d8b34a | 831 | max310x_port_write(port, MAX310X_LCR_REG, lcr); |
f6544418 AS |
832 | |
833 | /* Set read status mask */ | |
834 | port->read_status_mask = MAX310X_LSR_RXOVR_BIT; | |
835 | if (termios->c_iflag & INPCK) | |
836 | port->read_status_mask |= MAX310X_LSR_RXPAR_BIT | | |
837 | MAX310X_LSR_FRERR_BIT; | |
ef8b9ddc | 838 | if (termios->c_iflag & (IGNBRK | BRKINT | PARMRK)) |
f6544418 AS |
839 | port->read_status_mask |= MAX310X_LSR_RXBRK_BIT; |
840 | ||
841 | /* Set status ignore mask */ | |
842 | port->ignore_status_mask = 0; | |
843 | if (termios->c_iflag & IGNBRK) | |
844 | port->ignore_status_mask |= MAX310X_LSR_RXBRK_BIT; | |
845 | if (!(termios->c_cflag & CREAD)) | |
846 | port->ignore_status_mask |= MAX310X_LSR_RXPAR_BIT | | |
847 | MAX310X_LSR_RXOVR_BIT | | |
848 | MAX310X_LSR_FRERR_BIT | | |
849 | MAX310X_LSR_RXBRK_BIT; | |
850 | ||
851 | /* Configure flow control */ | |
10d8b34a AS |
852 | max310x_port_write(port, MAX310X_XON1_REG, termios->c_cc[VSTART]); |
853 | max310x_port_write(port, MAX310X_XOFF1_REG, termios->c_cc[VSTOP]); | |
f6544418 AS |
854 | if (termios->c_cflag & CRTSCTS) |
855 | flow |= MAX310X_FLOWCTRL_AUTOCTS_BIT | | |
856 | MAX310X_FLOWCTRL_AUTORTS_BIT; | |
857 | if (termios->c_iflag & IXON) | |
858 | flow |= MAX310X_FLOWCTRL_SWFLOW3_BIT | | |
859 | MAX310X_FLOWCTRL_SWFLOWEN_BIT; | |
860 | if (termios->c_iflag & IXOFF) | |
861 | flow |= MAX310X_FLOWCTRL_SWFLOW1_BIT | | |
862 | MAX310X_FLOWCTRL_SWFLOWEN_BIT; | |
10d8b34a | 863 | max310x_port_write(port, MAX310X_FLOWCTRL_REG, flow); |
f6544418 AS |
864 | |
865 | /* Get baud rate generator configuration */ | |
866 | baud = uart_get_baud_rate(port, termios, old, | |
867 | port->uartclk / 16 / 0xffff, | |
868 | port->uartclk / 4); | |
869 | ||
870 | /* Setup baudrate generator */ | |
e97e1556 | 871 | baud = max310x_set_baud(port, baud); |
f6544418 AS |
872 | |
873 | /* Update timeout according to new baud rate */ | |
874 | uart_update_timeout(port, termios->c_cflag, baud); | |
f6544418 AS |
875 | } |
876 | ||
55367c62 AS |
877 | static int max310x_ioctl(struct uart_port *port, unsigned int cmd, |
878 | unsigned long arg) | |
879 | { | |
86a41c46 | 880 | #if defined(TIOCSRS485) && defined(TIOCGRS485) |
55367c62 AS |
881 | struct serial_rs485 rs485; |
882 | unsigned int val; | |
883 | ||
884 | switch (cmd) { | |
885 | case TIOCSRS485: | |
0fd927f5 | 886 | if (copy_from_user(&rs485, (void __user *)arg, sizeof(rs485))) |
55367c62 AS |
887 | return -EFAULT; |
888 | if (rs485.delay_rts_before_send > 0x0f || | |
889 | rs485.delay_rts_after_send > 0x0f) | |
890 | return -ERANGE; | |
891 | val = (rs485.delay_rts_before_send << 4) | | |
892 | rs485.delay_rts_after_send; | |
893 | max310x_port_write(port, MAX310X_HDPIXDELAY_REG, val); | |
894 | if (rs485.flags & SER_RS485_ENABLED) { | |
895 | max310x_port_update(port, MAX310X_MODE1_REG, | |
896 | MAX310X_MODE1_TRNSCVCTRL_BIT, | |
897 | MAX310X_MODE1_TRNSCVCTRL_BIT); | |
898 | max310x_port_update(port, MAX310X_MODE2_REG, | |
899 | MAX310X_MODE2_ECHOSUPR_BIT, | |
900 | MAX310X_MODE2_ECHOSUPR_BIT); | |
901 | } else { | |
902 | max310x_port_update(port, MAX310X_MODE1_REG, | |
903 | MAX310X_MODE1_TRNSCVCTRL_BIT, 0); | |
904 | max310x_port_update(port, MAX310X_MODE2_REG, | |
905 | MAX310X_MODE2_ECHOSUPR_BIT, 0); | |
906 | } | |
86a41c46 | 907 | return 0; |
55367c62 AS |
908 | case TIOCGRS485: |
909 | memset(&rs485, 0, sizeof(rs485)); | |
910 | val = max310x_port_read(port, MAX310X_MODE1_REG); | |
911 | rs485.flags = (val & MAX310X_MODE1_TRNSCVCTRL_BIT) ? | |
912 | SER_RS485_ENABLED : 0; | |
913 | rs485.flags |= SER_RS485_RTS_ON_SEND; | |
914 | val = max310x_port_read(port, MAX310X_HDPIXDELAY_REG); | |
915 | rs485.delay_rts_before_send = val >> 4; | |
916 | rs485.delay_rts_after_send = val & 0x0f; | |
0fd927f5 | 917 | if (copy_to_user((void __user *)arg, &rs485, sizeof(rs485))) |
55367c62 | 918 | return -EFAULT; |
86a41c46 | 919 | return 0; |
55367c62 | 920 | default: |
86a41c46 | 921 | break; |
55367c62 | 922 | } |
86a41c46 | 923 | #endif |
55367c62 | 924 | |
86a41c46 | 925 | return -ENOIOCTLCMD; |
55367c62 AS |
926 | } |
927 | ||
f6544418 AS |
928 | static int max310x_startup(struct uart_port *port) |
929 | { | |
10d8b34a | 930 | struct max310x_port *s = dev_get_drvdata(port->dev); |
55367c62 | 931 | unsigned int val; |
f6544418 | 932 | |
10d8b34a | 933 | s->devtype->power(port, 1); |
f6544418 | 934 | |
f6544418 | 935 | /* Configure MODE1 register */ |
10d8b34a | 936 | max310x_port_update(port, MAX310X_MODE1_REG, |
55367c62 | 937 | MAX310X_MODE1_TRNSCVCTRL_BIT, 0); |
f6544418 | 938 | |
55367c62 AS |
939 | /* Configure MODE2 register & Reset FIFOs*/ |
940 | val = MAX310X_MODE2_RXEMPTINV_BIT | MAX310X_MODE2_FIFORST_BIT; | |
10d8b34a AS |
941 | max310x_port_write(port, MAX310X_MODE2_REG, val); |
942 | max310x_port_update(port, MAX310X_MODE2_REG, | |
943 | MAX310X_MODE2_FIFORST_BIT, 0); | |
f6544418 AS |
944 | |
945 | /* Configure flow control levels */ | |
946 | /* Flow control halt level 96, resume level 48 */ | |
10d8b34a AS |
947 | max310x_port_write(port, MAX310X_FLOWLVL_REG, |
948 | MAX310X_FLOWLVL_RES(48) | MAX310X_FLOWLVL_HALT(96)); | |
f6544418 | 949 | |
10d8b34a AS |
950 | /* Clear IRQ status register */ |
951 | max310x_port_read(port, MAX310X_IRQSTS_REG); | |
f6544418 | 952 | |
10d8b34a AS |
953 | /* Enable RX, TX, CTS change interrupts */ |
954 | val = MAX310X_IRQ_RXEMPTY_BIT | MAX310X_IRQ_TXEMPTY_BIT; | |
955 | max310x_port_write(port, MAX310X_IRQEN_REG, val | MAX310X_IRQ_CTS_BIT); | |
f6544418 AS |
956 | |
957 | return 0; | |
958 | } | |
959 | ||
960 | static void max310x_shutdown(struct uart_port *port) | |
961 | { | |
10d8b34a | 962 | struct max310x_port *s = dev_get_drvdata(port->dev); |
f6544418 AS |
963 | |
964 | /* Disable all interrupts */ | |
10d8b34a | 965 | max310x_port_write(port, MAX310X_IRQEN_REG, 0); |
f6544418 | 966 | |
10d8b34a | 967 | s->devtype->power(port, 0); |
f6544418 AS |
968 | } |
969 | ||
970 | static const char *max310x_type(struct uart_port *port) | |
971 | { | |
10d8b34a | 972 | struct max310x_port *s = dev_get_drvdata(port->dev); |
f6544418 | 973 | |
10d8b34a | 974 | return (port->type == PORT_MAX310X) ? s->devtype->name : NULL; |
f6544418 AS |
975 | } |
976 | ||
977 | static int max310x_request_port(struct uart_port *port) | |
978 | { | |
979 | /* Do nothing */ | |
980 | return 0; | |
981 | } | |
982 | ||
f6544418 AS |
983 | static void max310x_config_port(struct uart_port *port, int flags) |
984 | { | |
985 | if (flags & UART_CONFIG_TYPE) | |
986 | port->type = PORT_MAX310X; | |
987 | } | |
988 | ||
10d8b34a | 989 | static int max310x_verify_port(struct uart_port *port, struct serial_struct *s) |
f6544418 | 990 | { |
10d8b34a AS |
991 | if ((s->type != PORT_UNKNOWN) && (s->type != PORT_MAX310X)) |
992 | return -EINVAL; | |
993 | if (s->irq != port->irq) | |
994 | return -EINVAL; | |
f6544418 | 995 | |
10d8b34a | 996 | return 0; |
f6544418 AS |
997 | } |
998 | ||
10d8b34a AS |
999 | static void max310x_null_void(struct uart_port *port) |
1000 | { | |
1001 | /* Do nothing */ | |
1002 | } | |
1003 | ||
1004 | static const struct uart_ops max310x_ops = { | |
f6544418 AS |
1005 | .tx_empty = max310x_tx_empty, |
1006 | .set_mctrl = max310x_set_mctrl, | |
1007 | .get_mctrl = max310x_get_mctrl, | |
10d8b34a | 1008 | .stop_tx = max310x_null_void, |
f6544418 | 1009 | .start_tx = max310x_start_tx, |
10d8b34a AS |
1010 | .stop_rx = max310x_null_void, |
1011 | .enable_ms = max310x_null_void, | |
f6544418 AS |
1012 | .break_ctl = max310x_break_ctl, |
1013 | .startup = max310x_startup, | |
1014 | .shutdown = max310x_shutdown, | |
1015 | .set_termios = max310x_set_termios, | |
1016 | .type = max310x_type, | |
1017 | .request_port = max310x_request_port, | |
10d8b34a | 1018 | .release_port = max310x_null_void, |
f6544418 AS |
1019 | .config_port = max310x_config_port, |
1020 | .verify_port = max310x_verify_port, | |
55367c62 | 1021 | .ioctl = max310x_ioctl, |
f6544418 AS |
1022 | }; |
1023 | ||
c2978296 | 1024 | static int __maybe_unused max310x_suspend(struct device *dev) |
f6544418 | 1025 | { |
c2978296 | 1026 | struct max310x_port *s = dev_get_drvdata(dev); |
10d8b34a | 1027 | int i; |
f6544418 | 1028 | |
10d8b34a AS |
1029 | for (i = 0; i < s->uart.nr; i++) { |
1030 | uart_suspend_port(&s->uart, &s->p[i].port); | |
1031 | s->devtype->power(&s->p[i].port, 0); | |
1032 | } | |
f6544418 | 1033 | |
10d8b34a | 1034 | return 0; |
f6544418 AS |
1035 | } |
1036 | ||
c2978296 | 1037 | static int __maybe_unused max310x_resume(struct device *dev) |
f6544418 | 1038 | { |
c2978296 | 1039 | struct max310x_port *s = dev_get_drvdata(dev); |
10d8b34a | 1040 | int i; |
f6544418 | 1041 | |
10d8b34a AS |
1042 | for (i = 0; i < s->uart.nr; i++) { |
1043 | s->devtype->power(&s->p[i].port, 1); | |
1044 | uart_resume_port(&s->uart, &s->p[i].port); | |
1045 | } | |
f6544418 | 1046 | |
10d8b34a | 1047 | return 0; |
f6544418 AS |
1048 | } |
1049 | ||
27027a70 AS |
1050 | static SIMPLE_DEV_PM_OPS(max310x_pm_ops, max310x_suspend, max310x_resume); |
1051 | ||
f6544418 AS |
1052 | #ifdef CONFIG_GPIOLIB |
1053 | static int max310x_gpio_get(struct gpio_chip *chip, unsigned offset) | |
1054 | { | |
10d8b34a | 1055 | unsigned int val; |
f6544418 | 1056 | struct max310x_port *s = container_of(chip, struct max310x_port, gpio); |
10d8b34a | 1057 | struct uart_port *port = &s->p[offset / 4].port; |
f6544418 | 1058 | |
10d8b34a | 1059 | val = max310x_port_read(port, MAX310X_GPIODATA_REG); |
f6544418 | 1060 | |
10d8b34a | 1061 | return !!((val >> 4) & (1 << (offset % 4))); |
f6544418 AS |
1062 | } |
1063 | ||
1064 | static void max310x_gpio_set(struct gpio_chip *chip, unsigned offset, int value) | |
1065 | { | |
1066 | struct max310x_port *s = container_of(chip, struct max310x_port, gpio); | |
10d8b34a | 1067 | struct uart_port *port = &s->p[offset / 4].port; |
f6544418 | 1068 | |
10d8b34a AS |
1069 | max310x_port_update(port, MAX310X_GPIODATA_REG, 1 << (offset % 4), |
1070 | value ? 1 << (offset % 4) : 0); | |
f6544418 AS |
1071 | } |
1072 | ||
1073 | static int max310x_gpio_direction_input(struct gpio_chip *chip, unsigned offset) | |
1074 | { | |
1075 | struct max310x_port *s = container_of(chip, struct max310x_port, gpio); | |
10d8b34a | 1076 | struct uart_port *port = &s->p[offset / 4].port; |
f6544418 | 1077 | |
10d8b34a | 1078 | max310x_port_update(port, MAX310X_GPIOCFG_REG, 1 << (offset % 4), 0); |
f6544418 AS |
1079 | |
1080 | return 0; | |
1081 | } | |
1082 | ||
1083 | static int max310x_gpio_direction_output(struct gpio_chip *chip, | |
1084 | unsigned offset, int value) | |
1085 | { | |
1086 | struct max310x_port *s = container_of(chip, struct max310x_port, gpio); | |
10d8b34a | 1087 | struct uart_port *port = &s->p[offset / 4].port; |
f6544418 | 1088 | |
10d8b34a AS |
1089 | max310x_port_update(port, MAX310X_GPIODATA_REG, 1 << (offset % 4), |
1090 | value ? 1 << (offset % 4) : 0); | |
1091 | max310x_port_update(port, MAX310X_GPIOCFG_REG, 1 << (offset % 4), | |
1092 | 1 << (offset % 4)); | |
f6544418 AS |
1093 | |
1094 | return 0; | |
1095 | } | |
1096 | #endif | |
1097 | ||
27027a70 | 1098 | static int max310x_probe(struct device *dev, struct max310x_devtype *devtype, |
58afc909 | 1099 | struct regmap *regmap, int irq, unsigned long flags) |
f6544418 | 1100 | { |
d3a8a252 AS |
1101 | int i, ret, fmin, fmax, freq, uartclk; |
1102 | struct clk *clk_osc, *clk_xtal; | |
1103 | struct max310x_port *s; | |
1104 | bool xtal = false; | |
f6544418 | 1105 | |
27027a70 AS |
1106 | if (IS_ERR(regmap)) |
1107 | return PTR_ERR(regmap); | |
1108 | ||
f6544418 | 1109 | /* Alloc port structure */ |
10d8b34a AS |
1110 | s = devm_kzalloc(dev, sizeof(*s) + |
1111 | sizeof(struct max310x_one) * devtype->nr, GFP_KERNEL); | |
f6544418 AS |
1112 | if (!s) { |
1113 | dev_err(dev, "Error allocating port structure\n"); | |
1114 | return -ENOMEM; | |
1115 | } | |
f6544418 | 1116 | |
d3a8a252 AS |
1117 | clk_osc = devm_clk_get(dev, "osc"); |
1118 | clk_xtal = devm_clk_get(dev, "xtal"); | |
1119 | if (!IS_ERR(clk_osc)) { | |
1120 | s->clk = clk_osc; | |
1121 | fmin = 500000; | |
1122 | fmax = 35000000; | |
1123 | } else if (!IS_ERR(clk_xtal)) { | |
1124 | s->clk = clk_xtal; | |
1125 | fmin = 1000000; | |
1126 | fmax = 4000000; | |
1127 | xtal = true; | |
1128 | } else if (PTR_ERR(clk_osc) == -EPROBE_DEFER || | |
1129 | PTR_ERR(clk_xtal) == -EPROBE_DEFER) { | |
1130 | return -EPROBE_DEFER; | |
1131 | } else { | |
1132 | dev_err(dev, "Cannot get clock\n"); | |
1133 | return -EINVAL; | |
1134 | } | |
1135 | ||
1136 | ret = clk_prepare_enable(s->clk); | |
1137 | if (ret) | |
1138 | return ret; | |
1139 | ||
1140 | freq = clk_get_rate(s->clk); | |
1141 | /* Check frequency limits */ | |
1142 | if (freq < fmin || freq > fmax) { | |
1143 | ret = -ERANGE; | |
1144 | goto out_clk; | |
1145 | } | |
f6544418 | 1146 | |
27027a70 | 1147 | s->regmap = regmap; |
10d8b34a AS |
1148 | s->devtype = devtype; |
1149 | dev_set_drvdata(dev, s); | |
f6544418 | 1150 | |
10d8b34a AS |
1151 | /* Check device to ensure we are talking to what we expect */ |
1152 | ret = devtype->detect(dev); | |
1153 | if (ret) | |
d3a8a252 | 1154 | goto out_clk; |
10d8b34a AS |
1155 | |
1156 | for (i = 0; i < devtype->nr; i++) { | |
1157 | unsigned int offs = i << 5; | |
1158 | ||
1159 | /* Reset port */ | |
1160 | regmap_write(s->regmap, MAX310X_MODE2_REG + offs, | |
1161 | MAX310X_MODE2_RST_BIT); | |
1162 | /* Clear port reset */ | |
1163 | regmap_write(s->regmap, MAX310X_MODE2_REG + offs, 0); | |
1164 | ||
1165 | /* Wait for port startup */ | |
1166 | do { | |
1167 | regmap_read(s->regmap, | |
1168 | MAX310X_BRGDIVLSB_REG + offs, &ret); | |
1169 | } while (ret != 0x01); | |
1170 | ||
1171 | regmap_update_bits(s->regmap, MAX310X_MODE1_REG + offs, | |
1172 | MAX310X_MODE1_AUTOSLEEP_BIT, | |
1173 | MAX310X_MODE1_AUTOSLEEP_BIT); | |
f6544418 AS |
1174 | } |
1175 | ||
d3a8a252 | 1176 | uartclk = max310x_set_ref_clk(s, freq, xtal); |
10d8b34a AS |
1177 | dev_dbg(dev, "Reference clock set to %i Hz\n", uartclk); |
1178 | ||
f6544418 AS |
1179 | /* Register UART driver */ |
1180 | s->uart.owner = THIS_MODULE; | |
f6544418 AS |
1181 | s->uart.dev_name = "ttyMAX"; |
1182 | s->uart.major = MAX310X_MAJOR; | |
1183 | s->uart.minor = MAX310X_MINOR; | |
10d8b34a | 1184 | s->uart.nr = devtype->nr; |
f6544418 AS |
1185 | ret = uart_register_driver(&s->uart); |
1186 | if (ret) { | |
1187 | dev_err(dev, "Registering UART driver failed\n"); | |
d3a8a252 | 1188 | goto out_clk; |
f6544418 AS |
1189 | } |
1190 | ||
dba29a28 AS |
1191 | #ifdef CONFIG_GPIOLIB |
1192 | /* Setup GPIO cotroller */ | |
1193 | s->gpio.owner = THIS_MODULE; | |
1194 | s->gpio.dev = dev; | |
1195 | s->gpio.label = dev_name(dev); | |
1196 | s->gpio.direction_input = max310x_gpio_direction_input; | |
1197 | s->gpio.get = max310x_gpio_get; | |
1198 | s->gpio.direction_output= max310x_gpio_direction_output; | |
1199 | s->gpio.set = max310x_gpio_set; | |
1200 | s->gpio.base = -1; | |
1201 | s->gpio.ngpio = devtype->nr * 4; | |
1202 | s->gpio.can_sleep = 1; | |
1203 | ret = gpiochip_add(&s->gpio); | |
1204 | if (ret) | |
1205 | goto out_uart; | |
1206 | #endif | |
1207 | ||
0fbae887 AS |
1208 | mutex_init(&s->mutex); |
1209 | ||
10d8b34a AS |
1210 | for (i = 0; i < devtype->nr; i++) { |
1211 | /* Initialize port data */ | |
1212 | s->p[i].port.line = i; | |
1213 | s->p[i].port.dev = dev; | |
1214 | s->p[i].port.irq = irq; | |
1215 | s->p[i].port.type = PORT_MAX310X; | |
1216 | s->p[i].port.fifosize = MAX310X_FIFO_SIZE; | |
e7b8a3ce | 1217 | s->p[i].port.flags = UPF_FIXED_TYPE | UPF_LOW_LATENCY; |
10d8b34a AS |
1218 | s->p[i].port.iotype = UPIO_PORT; |
1219 | s->p[i].port.iobase = i * 0x20; | |
1220 | s->p[i].port.membase = (void __iomem *)~0; | |
1221 | s->p[i].port.uartclk = uartclk; | |
1222 | s->p[i].port.ops = &max310x_ops; | |
1223 | /* Disable all interrupts */ | |
1224 | max310x_port_write(&s->p[i].port, MAX310X_IRQEN_REG, 0); | |
1225 | /* Clear IRQ status register */ | |
1226 | max310x_port_read(&s->p[i].port, MAX310X_IRQSTS_REG); | |
1227 | /* Enable IRQ pin */ | |
1228 | max310x_port_update(&s->p[i].port, MAX310X_MODE1_REG, | |
1229 | MAX310X_MODE1_IRQSEL_BIT, | |
1230 | MAX310X_MODE1_IRQSEL_BIT); | |
1231 | /* Initialize queue for start TX */ | |
1232 | INIT_WORK(&s->p[i].tx_work, max310x_wq_proc); | |
e7b8a3ce AS |
1233 | /* Initialize queue for changing mode */ |
1234 | INIT_WORK(&s->p[i].md_work, max310x_md_proc); | |
10d8b34a AS |
1235 | /* Register port */ |
1236 | uart_add_one_port(&s->uart, &s->p[i].port); | |
1237 | /* Go to suspend mode */ | |
1238 | devtype->power(&s->p[i].port, 0); | |
1239 | } | |
f6544418 | 1240 | |
10d8b34a AS |
1241 | /* Setup interrupt */ |
1242 | ret = devm_request_threaded_irq(dev, irq, NULL, max310x_ist, | |
58afc909 | 1243 | IRQF_ONESHOT | flags, dev_name(dev), s); |
d3a8a252 AS |
1244 | if (!ret) |
1245 | return 0; | |
1246 | ||
1247 | dev_err(dev, "Unable to reguest IRQ %i\n", irq); | |
dba29a28 | 1248 | |
0fbae887 AS |
1249 | mutex_destroy(&s->mutex); |
1250 | ||
10d8b34a | 1251 | #ifdef CONFIG_GPIOLIB |
dba29a28 | 1252 | WARN_ON(gpiochip_remove(&s->gpio)); |
f6544418 | 1253 | |
dba29a28 | 1254 | out_uart: |
d4f6b412 | 1255 | #endif |
dba29a28 AS |
1256 | uart_unregister_driver(&s->uart); |
1257 | ||
d3a8a252 AS |
1258 | out_clk: |
1259 | clk_disable_unprepare(s->clk); | |
f6544418 | 1260 | |
d3a8a252 | 1261 | return ret; |
f6544418 AS |
1262 | } |
1263 | ||
10d8b34a | 1264 | static int max310x_remove(struct device *dev) |
f6544418 | 1265 | { |
f6544418 | 1266 | struct max310x_port *s = dev_get_drvdata(dev); |
10d8b34a | 1267 | int i, ret = 0; |
f6544418 | 1268 | |
dba29a28 AS |
1269 | #ifdef CONFIG_GPIOLIB |
1270 | ret = gpiochip_remove(&s->gpio); | |
1271 | if (ret) | |
1272 | return ret; | |
1273 | #endif | |
1274 | ||
10d8b34a AS |
1275 | for (i = 0; i < s->uart.nr; i++) { |
1276 | cancel_work_sync(&s->p[i].tx_work); | |
e7b8a3ce | 1277 | cancel_work_sync(&s->p[i].md_work); |
10d8b34a AS |
1278 | uart_remove_one_port(&s->uart, &s->p[i].port); |
1279 | s->devtype->power(&s->p[i].port, 0); | |
1280 | } | |
f6544418 | 1281 | |
0fbae887 | 1282 | mutex_destroy(&s->mutex); |
f6544418 | 1283 | uart_unregister_driver(&s->uart); |
d3a8a252 | 1284 | clk_disable_unprepare(s->clk); |
f6544418 | 1285 | |
23e7c6a7 | 1286 | return ret; |
f6544418 AS |
1287 | } |
1288 | ||
58afc909 AS |
1289 | static const struct of_device_id __maybe_unused max310x_dt_ids[] = { |
1290 | { .compatible = "maxim,max3107", .data = &max3107_devtype, }, | |
1291 | { .compatible = "maxim,max3108", .data = &max3108_devtype, }, | |
1292 | { .compatible = "maxim,max3109", .data = &max3109_devtype, }, | |
1293 | { .compatible = "maxim,max14830", .data = &max14830_devtype }, | |
1294 | { } | |
1295 | }; | |
1296 | MODULE_DEVICE_TABLE(of, max310x_dt_ids); | |
1297 | ||
27027a70 AS |
1298 | static struct regmap_config regcfg = { |
1299 | .reg_bits = 8, | |
1300 | .val_bits = 8, | |
1301 | .write_flag_mask = 0x80, | |
1302 | .cache_type = REGCACHE_RBTREE, | |
1303 | .writeable_reg = max310x_reg_writeable, | |
1304 | .volatile_reg = max310x_reg_volatile, | |
1305 | .precious_reg = max310x_reg_precious, | |
1306 | }; | |
1307 | ||
10d8b34a AS |
1308 | #ifdef CONFIG_SPI_MASTER |
1309 | static int max310x_spi_probe(struct spi_device *spi) | |
1310 | { | |
58afc909 AS |
1311 | struct max310x_devtype *devtype; |
1312 | unsigned long flags = 0; | |
27027a70 | 1313 | struct regmap *regmap; |
10d8b34a AS |
1314 | int ret; |
1315 | ||
1316 | /* Setup SPI bus */ | |
1317 | spi->bits_per_word = 8; | |
1318 | spi->mode = spi->mode ? : SPI_MODE_0; | |
1319 | spi->max_speed_hz = spi->max_speed_hz ? : 26000000; | |
1320 | ret = spi_setup(spi); | |
27027a70 | 1321 | if (ret) |
10d8b34a | 1322 | return ret; |
10d8b34a | 1323 | |
58afc909 AS |
1324 | if (spi->dev.of_node) { |
1325 | const struct of_device_id *of_id = | |
1326 | of_match_device(max310x_dt_ids, &spi->dev); | |
1327 | ||
1328 | devtype = (struct max310x_devtype *)of_id->data; | |
1329 | } else { | |
1330 | const struct spi_device_id *id_entry = spi_get_device_id(spi); | |
1331 | ||
1332 | devtype = (struct max310x_devtype *)id_entry->driver_data; | |
1333 | flags = IRQF_TRIGGER_FALLING; | |
1334 | } | |
1335 | ||
27027a70 AS |
1336 | regcfg.max_register = devtype->nr * 0x20 - 1; |
1337 | regmap = devm_regmap_init_spi(spi, ®cfg); | |
1338 | ||
58afc909 | 1339 | return max310x_probe(&spi->dev, devtype, regmap, spi->irq, flags); |
10d8b34a AS |
1340 | } |
1341 | ||
1342 | static int max310x_spi_remove(struct spi_device *spi) | |
1343 | { | |
1344 | return max310x_remove(&spi->dev); | |
1345 | } | |
1346 | ||
f6544418 | 1347 | static const struct spi_device_id max310x_id_table[] = { |
10d8b34a AS |
1348 | { "max3107", (kernel_ulong_t)&max3107_devtype, }, |
1349 | { "max3108", (kernel_ulong_t)&max3108_devtype, }, | |
21fc509f | 1350 | { "max3109", (kernel_ulong_t)&max3109_devtype, }, |
003236d9 | 1351 | { "max14830", (kernel_ulong_t)&max14830_devtype, }, |
1838b8c4 | 1352 | { } |
f6544418 AS |
1353 | }; |
1354 | MODULE_DEVICE_TABLE(spi, max310x_id_table); | |
1355 | ||
10d8b34a | 1356 | static struct spi_driver max310x_uart_driver = { |
f6544418 | 1357 | .driver = { |
58afc909 AS |
1358 | .name = MAX310X_NAME, |
1359 | .owner = THIS_MODULE, | |
1360 | .of_match_table = of_match_ptr(max310x_dt_ids), | |
1361 | .pm = &max310x_pm_ops, | |
f6544418 | 1362 | }, |
10d8b34a AS |
1363 | .probe = max310x_spi_probe, |
1364 | .remove = max310x_spi_remove, | |
f6544418 AS |
1365 | .id_table = max310x_id_table, |
1366 | }; | |
10d8b34a AS |
1367 | module_spi_driver(max310x_uart_driver); |
1368 | #endif | |
f6544418 | 1369 | |
10d8b34a | 1370 | MODULE_LICENSE("GPL"); |
f6544418 AS |
1371 | MODULE_AUTHOR("Alexander Shiyan <shc_work@mail.ru>"); |
1372 | MODULE_DESCRIPTION("MAX310X serial driver"); |