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6d2f5c27 JW |
1 | /* |
2 | * Driver for Nuvoton Technology Corporation w83667hg/w83677hg-i CIR | |
3 | * | |
4 | * Copyright (C) 2010 Jarod Wilson <jarod@redhat.com> | |
5 | * Copyright (C) 2009 Nuvoton PS Team | |
6 | * | |
7 | * Special thanks to Nuvoton for providing hardware, spec sheets and | |
8 | * sample code upon which portions of this driver are based. Indirect | |
9 | * thanks also to Maxim Levitsky, whose ene_ir driver this driver is | |
10 | * modeled after. | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or | |
13 | * modify it under the terms of the GNU General Public License as | |
14 | * published by the Free Software Foundation; either version 2 of the | |
15 | * License, or (at your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, but | |
18 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
20 | * General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software | |
24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
25 | * USA | |
26 | */ | |
27 | ||
28 | #include <linux/kernel.h> | |
29 | #include <linux/module.h> | |
30 | #include <linux/pnp.h> | |
31 | #include <linux/io.h> | |
32 | #include <linux/interrupt.h> | |
33 | #include <linux/sched.h> | |
34 | #include <linux/slab.h> | |
35 | #include <linux/input.h> | |
36 | #include <media/ir-core.h> | |
37 | #include <linux/pci_ids.h> | |
38 | ||
39 | #include "nuvoton-cir.h" | |
40 | ||
41 | static char *chip_id = "w836x7hg"; | |
42 | ||
43 | /* write val to config reg */ | |
44 | static inline void nvt_cr_write(struct nvt_dev *nvt, u8 val, u8 reg) | |
45 | { | |
46 | outb(reg, nvt->cr_efir); | |
47 | outb(val, nvt->cr_efdr); | |
48 | } | |
49 | ||
50 | /* read val from config reg */ | |
51 | static inline u8 nvt_cr_read(struct nvt_dev *nvt, u8 reg) | |
52 | { | |
53 | outb(reg, nvt->cr_efir); | |
54 | return inb(nvt->cr_efdr); | |
55 | } | |
56 | ||
57 | /* update config register bit without changing other bits */ | |
58 | static inline void nvt_set_reg_bit(struct nvt_dev *nvt, u8 val, u8 reg) | |
59 | { | |
60 | u8 tmp = nvt_cr_read(nvt, reg) | val; | |
61 | nvt_cr_write(nvt, tmp, reg); | |
62 | } | |
63 | ||
64 | /* clear config register bit without changing other bits */ | |
65 | static inline void nvt_clear_reg_bit(struct nvt_dev *nvt, u8 val, u8 reg) | |
66 | { | |
67 | u8 tmp = nvt_cr_read(nvt, reg) & ~val; | |
68 | nvt_cr_write(nvt, tmp, reg); | |
69 | } | |
70 | ||
71 | /* enter extended function mode */ | |
72 | static inline void nvt_efm_enable(struct nvt_dev *nvt) | |
73 | { | |
74 | /* Enabling Extended Function Mode explicitly requires writing 2x */ | |
75 | outb(EFER_EFM_ENABLE, nvt->cr_efir); | |
76 | outb(EFER_EFM_ENABLE, nvt->cr_efir); | |
77 | } | |
78 | ||
79 | /* exit extended function mode */ | |
80 | static inline void nvt_efm_disable(struct nvt_dev *nvt) | |
81 | { | |
82 | outb(EFER_EFM_DISABLE, nvt->cr_efir); | |
83 | } | |
84 | ||
85 | /* | |
86 | * When you want to address a specific logical device, write its logical | |
87 | * device number to CR_LOGICAL_DEV_SEL, then enable/disable by writing | |
88 | * 0x1/0x0 respectively to CR_LOGICAL_DEV_EN. | |
89 | */ | |
90 | static inline void nvt_select_logical_dev(struct nvt_dev *nvt, u8 ldev) | |
91 | { | |
92 | outb(CR_LOGICAL_DEV_SEL, nvt->cr_efir); | |
93 | outb(ldev, nvt->cr_efdr); | |
94 | } | |
95 | ||
96 | /* write val to cir config register */ | |
97 | static inline void nvt_cir_reg_write(struct nvt_dev *nvt, u8 val, u8 offset) | |
98 | { | |
99 | outb(val, nvt->cir_addr + offset); | |
100 | } | |
101 | ||
102 | /* read val from cir config register */ | |
103 | static u8 nvt_cir_reg_read(struct nvt_dev *nvt, u8 offset) | |
104 | { | |
105 | u8 val; | |
106 | ||
107 | val = inb(nvt->cir_addr + offset); | |
108 | ||
109 | return val; | |
110 | } | |
111 | ||
112 | /* write val to cir wake register */ | |
113 | static inline void nvt_cir_wake_reg_write(struct nvt_dev *nvt, | |
114 | u8 val, u8 offset) | |
115 | { | |
116 | outb(val, nvt->cir_wake_addr + offset); | |
117 | } | |
118 | ||
119 | /* read val from cir wake config register */ | |
120 | static u8 nvt_cir_wake_reg_read(struct nvt_dev *nvt, u8 offset) | |
121 | { | |
122 | u8 val; | |
123 | ||
124 | val = inb(nvt->cir_wake_addr + offset); | |
125 | ||
126 | return val; | |
127 | } | |
128 | ||
4e6e29ad JW |
129 | #define pr_reg(text, ...) \ |
130 | printk(KERN_INFO KBUILD_MODNAME ": " text, ## __VA_ARGS__) | |
131 | ||
6d2f5c27 JW |
132 | /* dump current cir register contents */ |
133 | static void cir_dump_regs(struct nvt_dev *nvt) | |
134 | { | |
135 | nvt_efm_enable(nvt); | |
136 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); | |
137 | ||
4e6e29ad JW |
138 | pr_reg("%s: Dump CIR logical device registers:\n", NVT_DRIVER_NAME); |
139 | pr_reg(" * CR CIR ACTIVE : 0x%x\n", | |
6d2f5c27 | 140 | nvt_cr_read(nvt, CR_LOGICAL_DEV_EN)); |
4e6e29ad | 141 | pr_reg(" * CR CIR BASE ADDR: 0x%x\n", |
6d2f5c27 JW |
142 | (nvt_cr_read(nvt, CR_CIR_BASE_ADDR_HI) << 8) | |
143 | nvt_cr_read(nvt, CR_CIR_BASE_ADDR_LO)); | |
4e6e29ad | 144 | pr_reg(" * CR CIR IRQ NUM: 0x%x\n", |
6d2f5c27 JW |
145 | nvt_cr_read(nvt, CR_CIR_IRQ_RSRC)); |
146 | ||
147 | nvt_efm_disable(nvt); | |
148 | ||
4e6e29ad JW |
149 | pr_reg("%s: Dump CIR registers:\n", NVT_DRIVER_NAME); |
150 | pr_reg(" * IRCON: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRCON)); | |
151 | pr_reg(" * IRSTS: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRSTS)); | |
152 | pr_reg(" * IREN: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IREN)); | |
153 | pr_reg(" * RXFCONT: 0x%x\n", nvt_cir_reg_read(nvt, CIR_RXFCONT)); | |
154 | pr_reg(" * CP: 0x%x\n", nvt_cir_reg_read(nvt, CIR_CP)); | |
155 | pr_reg(" * CC: 0x%x\n", nvt_cir_reg_read(nvt, CIR_CC)); | |
156 | pr_reg(" * SLCH: 0x%x\n", nvt_cir_reg_read(nvt, CIR_SLCH)); | |
157 | pr_reg(" * SLCL: 0x%x\n", nvt_cir_reg_read(nvt, CIR_SLCL)); | |
158 | pr_reg(" * FIFOCON: 0x%x\n", nvt_cir_reg_read(nvt, CIR_FIFOCON)); | |
159 | pr_reg(" * IRFIFOSTS: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRFIFOSTS)); | |
160 | pr_reg(" * SRXFIFO: 0x%x\n", nvt_cir_reg_read(nvt, CIR_SRXFIFO)); | |
161 | pr_reg(" * TXFCONT: 0x%x\n", nvt_cir_reg_read(nvt, CIR_TXFCONT)); | |
162 | pr_reg(" * STXFIFO: 0x%x\n", nvt_cir_reg_read(nvt, CIR_STXFIFO)); | |
163 | pr_reg(" * FCCH: 0x%x\n", nvt_cir_reg_read(nvt, CIR_FCCH)); | |
164 | pr_reg(" * FCCL: 0x%x\n", nvt_cir_reg_read(nvt, CIR_FCCL)); | |
165 | pr_reg(" * IRFSM: 0x%x\n", nvt_cir_reg_read(nvt, CIR_IRFSM)); | |
6d2f5c27 JW |
166 | } |
167 | ||
168 | /* dump current cir wake register contents */ | |
169 | static void cir_wake_dump_regs(struct nvt_dev *nvt) | |
170 | { | |
171 | u8 i, fifo_len; | |
172 | ||
173 | nvt_efm_enable(nvt); | |
174 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE); | |
175 | ||
4e6e29ad | 176 | pr_reg("%s: Dump CIR WAKE logical device registers:\n", |
6d2f5c27 | 177 | NVT_DRIVER_NAME); |
4e6e29ad | 178 | pr_reg(" * CR CIR WAKE ACTIVE : 0x%x\n", |
6d2f5c27 | 179 | nvt_cr_read(nvt, CR_LOGICAL_DEV_EN)); |
4e6e29ad | 180 | pr_reg(" * CR CIR WAKE BASE ADDR: 0x%x\n", |
6d2f5c27 | 181 | (nvt_cr_read(nvt, CR_CIR_BASE_ADDR_HI) << 8) | |
4e6e29ad JW |
182 | nvt_cr_read(nvt, CR_CIR_BASE_ADDR_LO)); |
183 | pr_reg(" * CR CIR WAKE IRQ NUM: 0x%x\n", | |
6d2f5c27 JW |
184 | nvt_cr_read(nvt, CR_CIR_IRQ_RSRC)); |
185 | ||
186 | nvt_efm_disable(nvt); | |
187 | ||
4e6e29ad JW |
188 | pr_reg("%s: Dump CIR WAKE registers\n", NVT_DRIVER_NAME); |
189 | pr_reg(" * IRCON: 0x%x\n", | |
6d2f5c27 | 190 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRCON)); |
4e6e29ad | 191 | pr_reg(" * IRSTS: 0x%x\n", |
6d2f5c27 | 192 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRSTS)); |
4e6e29ad | 193 | pr_reg(" * IREN: 0x%x\n", |
6d2f5c27 | 194 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_IREN)); |
4e6e29ad | 195 | pr_reg(" * FIFO CMP DEEP: 0x%x\n", |
6d2f5c27 | 196 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_CMP_DEEP)); |
4e6e29ad | 197 | pr_reg(" * FIFO CMP TOL: 0x%x\n", |
6d2f5c27 | 198 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_CMP_TOL)); |
4e6e29ad | 199 | pr_reg(" * FIFO COUNT: 0x%x\n", |
6d2f5c27 | 200 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_COUNT)); |
4e6e29ad | 201 | pr_reg(" * SLCH: 0x%x\n", |
6d2f5c27 | 202 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_SLCH)); |
4e6e29ad | 203 | pr_reg(" * SLCL: 0x%x\n", |
6d2f5c27 | 204 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_SLCL)); |
4e6e29ad | 205 | pr_reg(" * FIFOCON: 0x%x\n", |
6d2f5c27 | 206 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFOCON)); |
4e6e29ad | 207 | pr_reg(" * SRXFSTS: 0x%x\n", |
6d2f5c27 | 208 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_SRXFSTS)); |
4e6e29ad | 209 | pr_reg(" * SAMPLE RX FIFO: 0x%x\n", |
6d2f5c27 | 210 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_SAMPLE_RX_FIFO)); |
4e6e29ad | 211 | pr_reg(" * WR FIFO DATA: 0x%x\n", |
6d2f5c27 | 212 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_WR_FIFO_DATA)); |
4e6e29ad | 213 | pr_reg(" * RD FIFO ONLY: 0x%x\n", |
6d2f5c27 | 214 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY)); |
4e6e29ad | 215 | pr_reg(" * RD FIFO ONLY IDX: 0x%x\n", |
6d2f5c27 | 216 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY_IDX)); |
4e6e29ad | 217 | pr_reg(" * FIFO IGNORE: 0x%x\n", |
6d2f5c27 | 218 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_IGNORE)); |
4e6e29ad | 219 | pr_reg(" * IRFSM: 0x%x\n", |
6d2f5c27 JW |
220 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRFSM)); |
221 | ||
222 | fifo_len = nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_COUNT); | |
4e6e29ad JW |
223 | pr_reg("%s: Dump CIR WAKE FIFO (len %d)\n", NVT_DRIVER_NAME, fifo_len); |
224 | pr_reg("* Contents = "); | |
6d2f5c27 | 225 | for (i = 0; i < fifo_len; i++) |
4e6e29ad | 226 | printk(KERN_CONT "%02x ", |
6d2f5c27 | 227 | nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY)); |
4e6e29ad | 228 | printk(KERN_CONT "\n"); |
6d2f5c27 JW |
229 | } |
230 | ||
231 | /* detect hardware features */ | |
232 | static int nvt_hw_detect(struct nvt_dev *nvt) | |
233 | { | |
234 | unsigned long flags; | |
235 | u8 chip_major, chip_minor; | |
236 | int ret = 0; | |
237 | ||
238 | nvt_efm_enable(nvt); | |
239 | ||
240 | /* Check if we're wired for the alternate EFER setup */ | |
241 | chip_major = nvt_cr_read(nvt, CR_CHIP_ID_HI); | |
242 | if (chip_major == 0xff) { | |
243 | nvt->cr_efir = CR_EFIR2; | |
244 | nvt->cr_efdr = CR_EFDR2; | |
245 | nvt_efm_enable(nvt); | |
246 | chip_major = nvt_cr_read(nvt, CR_CHIP_ID_HI); | |
247 | } | |
248 | ||
249 | chip_minor = nvt_cr_read(nvt, CR_CHIP_ID_LO); | |
250 | nvt_dbg("%s: chip id: 0x%02x 0x%02x", chip_id, chip_major, chip_minor); | |
251 | ||
252 | if (chip_major != CHIP_ID_HIGH && | |
253 | (chip_minor != CHIP_ID_LOW || chip_minor != CHIP_ID_LOW2)) | |
254 | ret = -ENODEV; | |
255 | ||
256 | nvt_efm_disable(nvt); | |
257 | ||
258 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
259 | nvt->chip_major = chip_major; | |
260 | nvt->chip_minor = chip_minor; | |
261 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
262 | ||
263 | return ret; | |
264 | } | |
265 | ||
266 | static void nvt_cir_ldev_init(struct nvt_dev *nvt) | |
267 | { | |
268 | u8 val; | |
269 | ||
270 | /* output pin selection (Pin95=CIRRX, Pin96=CIRTX1, WB enabled */ | |
271 | val = nvt_cr_read(nvt, CR_OUTPUT_PIN_SEL); | |
272 | val &= OUTPUT_PIN_SEL_MASK; | |
273 | val |= (OUTPUT_ENABLE_CIR | OUTPUT_ENABLE_CIRWB); | |
274 | nvt_cr_write(nvt, val, CR_OUTPUT_PIN_SEL); | |
275 | ||
276 | /* Select CIR logical device and enable */ | |
277 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); | |
278 | nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN); | |
279 | ||
280 | nvt_cr_write(nvt, nvt->cir_addr >> 8, CR_CIR_BASE_ADDR_HI); | |
281 | nvt_cr_write(nvt, nvt->cir_addr & 0xff, CR_CIR_BASE_ADDR_LO); | |
282 | ||
283 | nvt_cr_write(nvt, nvt->cir_irq, CR_CIR_IRQ_RSRC); | |
284 | ||
285 | nvt_dbg("CIR initialized, base io port address: 0x%lx, irq: %d", | |
286 | nvt->cir_addr, nvt->cir_irq); | |
287 | } | |
288 | ||
289 | static void nvt_cir_wake_ldev_init(struct nvt_dev *nvt) | |
290 | { | |
291 | /* Select ACPI logical device, enable it and CIR Wake */ | |
292 | nvt_select_logical_dev(nvt, LOGICAL_DEV_ACPI); | |
293 | nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN); | |
294 | ||
295 | /* Enable CIR Wake via PSOUT# (Pin60) */ | |
296 | nvt_set_reg_bit(nvt, CIR_WAKE_ENABLE_BIT, CR_ACPI_CIR_WAKE); | |
297 | ||
298 | /* enable cir interrupt of mouse/keyboard IRQ event */ | |
299 | nvt_set_reg_bit(nvt, CIR_INTR_MOUSE_IRQ_BIT, CR_ACPI_IRQ_EVENTS); | |
300 | ||
301 | /* enable pme interrupt of cir wakeup event */ | |
302 | nvt_set_reg_bit(nvt, PME_INTR_CIR_PASS_BIT, CR_ACPI_IRQ_EVENTS2); | |
303 | ||
304 | /* Select CIR Wake logical device and enable */ | |
305 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE); | |
306 | nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN); | |
307 | ||
308 | nvt_cr_write(nvt, nvt->cir_wake_addr >> 8, CR_CIR_BASE_ADDR_HI); | |
309 | nvt_cr_write(nvt, nvt->cir_wake_addr & 0xff, CR_CIR_BASE_ADDR_LO); | |
310 | ||
311 | nvt_cr_write(nvt, nvt->cir_wake_irq, CR_CIR_IRQ_RSRC); | |
312 | ||
313 | nvt_dbg("CIR Wake initialized, base io port address: 0x%lx, irq: %d", | |
314 | nvt->cir_wake_addr, nvt->cir_wake_irq); | |
315 | } | |
316 | ||
317 | /* clear out the hardware's cir rx fifo */ | |
318 | static void nvt_clear_cir_fifo(struct nvt_dev *nvt) | |
319 | { | |
320 | u8 val; | |
321 | ||
322 | val = nvt_cir_reg_read(nvt, CIR_FIFOCON); | |
323 | nvt_cir_reg_write(nvt, val | CIR_FIFOCON_RXFIFOCLR, CIR_FIFOCON); | |
324 | } | |
325 | ||
326 | /* clear out the hardware's cir wake rx fifo */ | |
327 | static void nvt_clear_cir_wake_fifo(struct nvt_dev *nvt) | |
328 | { | |
329 | u8 val; | |
330 | ||
331 | val = nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFOCON); | |
332 | nvt_cir_wake_reg_write(nvt, val | CIR_WAKE_FIFOCON_RXFIFOCLR, | |
333 | CIR_WAKE_FIFOCON); | |
334 | } | |
335 | ||
336 | /* clear out the hardware's cir tx fifo */ | |
337 | static void nvt_clear_tx_fifo(struct nvt_dev *nvt) | |
338 | { | |
339 | u8 val; | |
340 | ||
341 | val = nvt_cir_reg_read(nvt, CIR_FIFOCON); | |
342 | nvt_cir_reg_write(nvt, val | CIR_FIFOCON_TXFIFOCLR, CIR_FIFOCON); | |
343 | } | |
344 | ||
fbdc781c JW |
345 | /* enable RX Trigger Level Reach and Packet End interrupts */ |
346 | static void nvt_set_cir_iren(struct nvt_dev *nvt) | |
347 | { | |
348 | u8 iren; | |
349 | ||
350 | iren = CIR_IREN_RTR | CIR_IREN_PE; | |
351 | nvt_cir_reg_write(nvt, iren, CIR_IREN); | |
352 | } | |
353 | ||
6d2f5c27 JW |
354 | static void nvt_cir_regs_init(struct nvt_dev *nvt) |
355 | { | |
356 | /* set sample limit count (PE interrupt raised when reached) */ | |
357 | nvt_cir_reg_write(nvt, CIR_RX_LIMIT_COUNT >> 8, CIR_SLCH); | |
358 | nvt_cir_reg_write(nvt, CIR_RX_LIMIT_COUNT & 0xff, CIR_SLCL); | |
359 | ||
360 | /* set fifo irq trigger levels */ | |
361 | nvt_cir_reg_write(nvt, CIR_FIFOCON_TX_TRIGGER_LEV | | |
362 | CIR_FIFOCON_RX_TRIGGER_LEV, CIR_FIFOCON); | |
363 | ||
364 | /* | |
365 | * Enable TX and RX, specify carrier on = low, off = high, and set | |
366 | * sample period (currently 50us) | |
367 | */ | |
4e6e29ad JW |
368 | nvt_cir_reg_write(nvt, |
369 | CIR_IRCON_TXEN | CIR_IRCON_RXEN | | |
370 | CIR_IRCON_RXINV | CIR_IRCON_SAMPLE_PERIOD_SEL, | |
371 | CIR_IRCON); | |
6d2f5c27 JW |
372 | |
373 | /* clear hardware rx and tx fifos */ | |
374 | nvt_clear_cir_fifo(nvt); | |
375 | nvt_clear_tx_fifo(nvt); | |
376 | ||
377 | /* clear any and all stray interrupts */ | |
378 | nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS); | |
379 | ||
fbdc781c JW |
380 | /* and finally, enable interrupts */ |
381 | nvt_set_cir_iren(nvt); | |
6d2f5c27 JW |
382 | } |
383 | ||
384 | static void nvt_cir_wake_regs_init(struct nvt_dev *nvt) | |
385 | { | |
386 | /* set number of bytes needed for wake key comparison (default 67) */ | |
387 | nvt_cir_wake_reg_write(nvt, CIR_WAKE_FIFO_LEN, CIR_WAKE_FIFO_CMP_DEEP); | |
388 | ||
389 | /* set tolerance/variance allowed per byte during wake compare */ | |
390 | nvt_cir_wake_reg_write(nvt, CIR_WAKE_CMP_TOLERANCE, | |
391 | CIR_WAKE_FIFO_CMP_TOL); | |
392 | ||
393 | /* set sample limit count (PE interrupt raised when reached) */ | |
394 | nvt_cir_wake_reg_write(nvt, CIR_RX_LIMIT_COUNT >> 8, CIR_WAKE_SLCH); | |
395 | nvt_cir_wake_reg_write(nvt, CIR_RX_LIMIT_COUNT & 0xff, CIR_WAKE_SLCL); | |
396 | ||
397 | /* set cir wake fifo rx trigger level (currently 67) */ | |
398 | nvt_cir_wake_reg_write(nvt, CIR_WAKE_FIFOCON_RX_TRIGGER_LEV, | |
399 | CIR_WAKE_FIFOCON); | |
400 | ||
401 | /* | |
402 | * Enable TX and RX, specific carrier on = low, off = high, and set | |
403 | * sample period (currently 50us) | |
404 | */ | |
405 | nvt_cir_wake_reg_write(nvt, CIR_WAKE_IRCON_MODE0 | CIR_WAKE_IRCON_RXEN | | |
406 | CIR_WAKE_IRCON_R | CIR_WAKE_IRCON_RXINV | | |
407 | CIR_WAKE_IRCON_SAMPLE_PERIOD_SEL, | |
408 | CIR_WAKE_IRCON); | |
409 | ||
410 | /* clear cir wake rx fifo */ | |
411 | nvt_clear_cir_wake_fifo(nvt); | |
412 | ||
413 | /* clear any and all stray interrupts */ | |
414 | nvt_cir_wake_reg_write(nvt, 0xff, CIR_WAKE_IRSTS); | |
415 | } | |
416 | ||
417 | static void nvt_enable_wake(struct nvt_dev *nvt) | |
418 | { | |
419 | nvt_efm_enable(nvt); | |
420 | ||
421 | nvt_select_logical_dev(nvt, LOGICAL_DEV_ACPI); | |
422 | nvt_set_reg_bit(nvt, CIR_WAKE_ENABLE_BIT, CR_ACPI_CIR_WAKE); | |
423 | nvt_set_reg_bit(nvt, CIR_INTR_MOUSE_IRQ_BIT, CR_ACPI_IRQ_EVENTS); | |
424 | nvt_set_reg_bit(nvt, PME_INTR_CIR_PASS_BIT, CR_ACPI_IRQ_EVENTS2); | |
425 | ||
426 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE); | |
427 | nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN); | |
428 | ||
429 | nvt_efm_disable(nvt); | |
430 | ||
431 | nvt_cir_wake_reg_write(nvt, CIR_WAKE_IRCON_MODE0 | CIR_WAKE_IRCON_RXEN | | |
432 | CIR_WAKE_IRCON_R | CIR_WAKE_IRCON_RXINV | | |
4e6e29ad JW |
433 | CIR_WAKE_IRCON_SAMPLE_PERIOD_SEL, |
434 | CIR_WAKE_IRCON); | |
6d2f5c27 JW |
435 | nvt_cir_wake_reg_write(nvt, 0xff, CIR_WAKE_IRSTS); |
436 | nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IREN); | |
437 | } | |
438 | ||
439 | /* rx carrier detect only works in learning mode, must be called w/nvt_lock */ | |
440 | static u32 nvt_rx_carrier_detect(struct nvt_dev *nvt) | |
441 | { | |
442 | u32 count, carrier, duration = 0; | |
443 | int i; | |
444 | ||
445 | count = nvt_cir_reg_read(nvt, CIR_FCCL) | | |
446 | nvt_cir_reg_read(nvt, CIR_FCCH) << 8; | |
447 | ||
448 | for (i = 0; i < nvt->pkts; i++) { | |
449 | if (nvt->buf[i] & BUF_PULSE_BIT) | |
450 | duration += nvt->buf[i] & BUF_LEN_MASK; | |
451 | } | |
452 | ||
453 | duration *= SAMPLE_PERIOD; | |
454 | ||
455 | if (!count || !duration) { | |
456 | nvt_pr(KERN_NOTICE, "Unable to determine carrier! (c:%u, d:%u)", | |
457 | count, duration); | |
458 | return 0; | |
459 | } | |
460 | ||
461 | carrier = (count * 1000000) / duration; | |
462 | ||
463 | if ((carrier > MAX_CARRIER) || (carrier < MIN_CARRIER)) | |
464 | nvt_dbg("WTF? Carrier frequency out of range!"); | |
465 | ||
466 | nvt_dbg("Carrier frequency: %u (count %u, duration %u)", | |
467 | carrier, count, duration); | |
468 | ||
469 | return carrier; | |
470 | } | |
471 | ||
472 | /* | |
473 | * set carrier frequency | |
474 | * | |
475 | * set carrier on 2 registers: CP & CC | |
476 | * always set CP as 0x81 | |
477 | * set CC by SPEC, CC = 3MHz/carrier - 1 | |
478 | */ | |
479 | static int nvt_set_tx_carrier(void *data, u32 carrier) | |
480 | { | |
481 | struct nvt_dev *nvt = data; | |
482 | u16 val; | |
483 | ||
484 | nvt_cir_reg_write(nvt, 1, CIR_CP); | |
485 | val = 3000000 / (carrier) - 1; | |
486 | nvt_cir_reg_write(nvt, val & 0xff, CIR_CC); | |
487 | ||
488 | nvt_dbg("cp: 0x%x cc: 0x%x\n", | |
489 | nvt_cir_reg_read(nvt, CIR_CP), nvt_cir_reg_read(nvt, CIR_CC)); | |
490 | ||
491 | return 0; | |
492 | } | |
493 | ||
494 | /* | |
495 | * nvt_tx_ir | |
496 | * | |
497 | * 1) clean TX fifo first (handled by AP) | |
498 | * 2) copy data from user space | |
499 | * 3) disable RX interrupts, enable TX interrupts: TTR & TFU | |
500 | * 4) send 9 packets to TX FIFO to open TTR | |
501 | * in interrupt_handler: | |
502 | * 5) send all data out | |
503 | * go back to write(): | |
504 | * 6) disable TX interrupts, re-enable RX interupts | |
505 | * | |
506 | * The key problem of this function is user space data may larger than | |
507 | * driver's data buf length. So nvt_tx_ir() will only copy TX_BUF_LEN data to | |
508 | * buf, and keep current copied data buf num in cur_buf_num. But driver's buf | |
509 | * number may larger than TXFCONT (0xff). So in interrupt_handler, it has to | |
510 | * set TXFCONT as 0xff, until buf_count less than 0xff. | |
511 | */ | |
512 | static int nvt_tx_ir(void *priv, int *txbuf, u32 n) | |
513 | { | |
514 | struct nvt_dev *nvt = priv; | |
515 | unsigned long flags; | |
516 | size_t cur_count; | |
517 | unsigned int i; | |
518 | u8 iren; | |
519 | int ret; | |
520 | ||
521 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
522 | ||
523 | if (n >= TX_BUF_LEN) { | |
524 | nvt->tx.buf_count = cur_count = TX_BUF_LEN; | |
525 | ret = TX_BUF_LEN; | |
526 | } else { | |
527 | nvt->tx.buf_count = cur_count = n; | |
528 | ret = n; | |
529 | } | |
530 | ||
531 | memcpy(nvt->tx.buf, txbuf, nvt->tx.buf_count); | |
532 | ||
533 | nvt->tx.cur_buf_num = 0; | |
534 | ||
535 | /* save currently enabled interrupts */ | |
536 | iren = nvt_cir_reg_read(nvt, CIR_IREN); | |
537 | ||
538 | /* now disable all interrupts, save TFU & TTR */ | |
539 | nvt_cir_reg_write(nvt, CIR_IREN_TFU | CIR_IREN_TTR, CIR_IREN); | |
540 | ||
541 | nvt->tx.tx_state = ST_TX_REPLY; | |
542 | ||
543 | nvt_cir_reg_write(nvt, CIR_FIFOCON_TX_TRIGGER_LEV_8 | | |
544 | CIR_FIFOCON_RXFIFOCLR, CIR_FIFOCON); | |
545 | ||
546 | /* trigger TTR interrupt by writing out ones, (yes, it's ugly) */ | |
547 | for (i = 0; i < 9; i++) | |
548 | nvt_cir_reg_write(nvt, 0x01, CIR_STXFIFO); | |
549 | ||
550 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
551 | ||
552 | wait_event(nvt->tx.queue, nvt->tx.tx_state == ST_TX_REQUEST); | |
553 | ||
554 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
555 | nvt->tx.tx_state = ST_TX_NONE; | |
556 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
557 | ||
558 | /* restore enabled interrupts to prior state */ | |
559 | nvt_cir_reg_write(nvt, iren, CIR_IREN); | |
560 | ||
561 | return ret; | |
562 | } | |
563 | ||
564 | /* dump contents of the last rx buffer we got from the hw rx fifo */ | |
565 | static void nvt_dump_rx_buf(struct nvt_dev *nvt) | |
566 | { | |
567 | int i; | |
568 | ||
4e6e29ad | 569 | printk(KERN_DEBUG "%s (len %d): ", __func__, nvt->pkts); |
6d2f5c27 | 570 | for (i = 0; (i < nvt->pkts) && (i < RX_BUF_LEN); i++) |
4e6e29ad JW |
571 | printk(KERN_CONT "0x%02x ", nvt->buf[i]); |
572 | printk(KERN_CONT "\n"); | |
6d2f5c27 JW |
573 | } |
574 | ||
575 | /* | |
576 | * Process raw data in rx driver buffer, store it in raw IR event kfifo, | |
577 | * trigger decode when appropriate. | |
578 | * | |
579 | * We get IR data samples one byte at a time. If the msb is set, its a pulse, | |
580 | * otherwise its a space. The lower 7 bits are the count of SAMPLE_PERIOD | |
581 | * (default 50us) intervals for that pulse/space. A discrete signal is | |
582 | * followed by a series of 0x7f packets, then either 0x7<something> or 0x80 | |
583 | * to signal more IR coming (repeats) or end of IR, respectively. We store | |
584 | * sample data in the raw event kfifo until we see 0x7<something> (except f) | |
585 | * or 0x80, at which time, we trigger a decode operation. | |
586 | */ | |
587 | static void nvt_process_rx_ir_data(struct nvt_dev *nvt) | |
588 | { | |
4651918a | 589 | DEFINE_IR_RAW_EVENT(rawir); |
6d2f5c27 JW |
590 | unsigned int count; |
591 | u32 carrier; | |
592 | u8 sample; | |
593 | int i; | |
594 | ||
595 | nvt_dbg_verbose("%s firing", __func__); | |
596 | ||
597 | if (debug) | |
598 | nvt_dump_rx_buf(nvt); | |
599 | ||
600 | if (nvt->carrier_detect_enabled) | |
601 | carrier = nvt_rx_carrier_detect(nvt); | |
602 | ||
603 | count = nvt->pkts; | |
604 | nvt_dbg_verbose("Processing buffer of len %d", count); | |
605 | ||
b7582815 JW |
606 | init_ir_raw_event(&rawir); |
607 | ||
6d2f5c27 JW |
608 | for (i = 0; i < count; i++) { |
609 | nvt->pkts--; | |
610 | sample = nvt->buf[i]; | |
611 | ||
612 | rawir.pulse = ((sample & BUF_PULSE_BIT) != 0); | |
613 | rawir.duration = (sample & BUF_LEN_MASK) | |
614 | * SAMPLE_PERIOD * 1000; | |
615 | ||
616 | if ((sample & BUF_LEN_MASK) == BUF_LEN_MASK) { | |
617 | if (nvt->rawir.pulse == rawir.pulse) | |
618 | nvt->rawir.duration += rawir.duration; | |
619 | else { | |
620 | nvt->rawir.duration = rawir.duration; | |
621 | nvt->rawir.pulse = rawir.pulse; | |
622 | } | |
623 | continue; | |
624 | } | |
625 | ||
626 | rawir.duration += nvt->rawir.duration; | |
4651918a ML |
627 | |
628 | init_ir_raw_event(&nvt->rawir); | |
6d2f5c27 JW |
629 | nvt->rawir.duration = 0; |
630 | nvt->rawir.pulse = rawir.pulse; | |
631 | ||
632 | if (sample == BUF_PULSE_BIT) | |
633 | rawir.pulse = false; | |
634 | ||
635 | if (rawir.duration) { | |
636 | nvt_dbg("Storing %s with duration %d", | |
637 | rawir.pulse ? "pulse" : "space", | |
638 | rawir.duration); | |
639 | ||
640 | ir_raw_event_store(nvt->rdev, &rawir); | |
641 | } | |
642 | ||
643 | /* | |
644 | * BUF_PULSE_BIT indicates end of IR data, BUF_REPEAT_BYTE | |
645 | * indicates end of IR signal, but new data incoming. In both | |
646 | * cases, it means we're ready to call ir_raw_event_handle | |
647 | */ | |
b7582815 JW |
648 | if ((sample == BUF_PULSE_BIT) && nvt->pkts) { |
649 | nvt_dbg("Calling ir_raw_event_handle (signal end)\n"); | |
6d2f5c27 | 650 | ir_raw_event_handle(nvt->rdev); |
b7582815 | 651 | } |
6d2f5c27 JW |
652 | } |
653 | ||
b7582815 JW |
654 | nvt_dbg("Calling ir_raw_event_handle (buffer empty)\n"); |
655 | ir_raw_event_handle(nvt->rdev); | |
656 | ||
6d2f5c27 JW |
657 | if (nvt->pkts) { |
658 | nvt_dbg("Odd, pkts should be 0 now... (its %u)", nvt->pkts); | |
659 | nvt->pkts = 0; | |
660 | } | |
661 | ||
662 | nvt_dbg_verbose("%s done", __func__); | |
663 | } | |
664 | ||
fbdc781c JW |
665 | static void nvt_handle_rx_fifo_overrun(struct nvt_dev *nvt) |
666 | { | |
667 | nvt_pr(KERN_WARNING, "RX FIFO overrun detected, flushing data!"); | |
668 | ||
669 | nvt->pkts = 0; | |
670 | nvt_clear_cir_fifo(nvt); | |
671 | ir_raw_event_reset(nvt->rdev); | |
672 | } | |
673 | ||
6d2f5c27 JW |
674 | /* copy data from hardware rx fifo into driver buffer */ |
675 | static void nvt_get_rx_ir_data(struct nvt_dev *nvt) | |
676 | { | |
677 | unsigned long flags; | |
678 | u8 fifocount, val; | |
679 | unsigned int b_idx; | |
fbdc781c | 680 | bool overrun = false; |
6d2f5c27 JW |
681 | int i; |
682 | ||
683 | /* Get count of how many bytes to read from RX FIFO */ | |
684 | fifocount = nvt_cir_reg_read(nvt, CIR_RXFCONT); | |
685 | /* if we get 0xff, probably means the logical dev is disabled */ | |
686 | if (fifocount == 0xff) | |
687 | return; | |
fbdc781c | 688 | /* watch out for a fifo overrun condition */ |
6d2f5c27 | 689 | else if (fifocount > RX_BUF_LEN) { |
fbdc781c JW |
690 | overrun = true; |
691 | fifocount = RX_BUF_LEN; | |
6d2f5c27 JW |
692 | } |
693 | ||
694 | nvt_dbg("attempting to fetch %u bytes from hw rx fifo", fifocount); | |
695 | ||
696 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
697 | ||
698 | b_idx = nvt->pkts; | |
699 | ||
700 | /* This should never happen, but lets check anyway... */ | |
701 | if (b_idx + fifocount > RX_BUF_LEN) { | |
702 | nvt_process_rx_ir_data(nvt); | |
703 | b_idx = 0; | |
704 | } | |
705 | ||
706 | /* Read fifocount bytes from CIR Sample RX FIFO register */ | |
707 | for (i = 0; i < fifocount; i++) { | |
708 | val = nvt_cir_reg_read(nvt, CIR_SRXFIFO); | |
709 | nvt->buf[b_idx + i] = val; | |
710 | } | |
711 | ||
712 | nvt->pkts += fifocount; | |
713 | nvt_dbg("%s: pkts now %d", __func__, nvt->pkts); | |
714 | ||
715 | nvt_process_rx_ir_data(nvt); | |
716 | ||
fbdc781c JW |
717 | if (overrun) |
718 | nvt_handle_rx_fifo_overrun(nvt); | |
719 | ||
6d2f5c27 JW |
720 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); |
721 | } | |
722 | ||
723 | static void nvt_cir_log_irqs(u8 status, u8 iren) | |
724 | { | |
725 | nvt_pr(KERN_INFO, "IRQ 0x%02x (IREN 0x%02x) :%s%s%s%s%s%s%s%s%s", | |
726 | status, iren, | |
727 | status & CIR_IRSTS_RDR ? " RDR" : "", | |
728 | status & CIR_IRSTS_RTR ? " RTR" : "", | |
729 | status & CIR_IRSTS_PE ? " PE" : "", | |
730 | status & CIR_IRSTS_RFO ? " RFO" : "", | |
731 | status & CIR_IRSTS_TE ? " TE" : "", | |
732 | status & CIR_IRSTS_TTR ? " TTR" : "", | |
733 | status & CIR_IRSTS_TFU ? " TFU" : "", | |
734 | status & CIR_IRSTS_GH ? " GH" : "", | |
735 | status & ~(CIR_IRSTS_RDR | CIR_IRSTS_RTR | CIR_IRSTS_PE | | |
736 | CIR_IRSTS_RFO | CIR_IRSTS_TE | CIR_IRSTS_TTR | | |
737 | CIR_IRSTS_TFU | CIR_IRSTS_GH) ? " ?" : ""); | |
738 | } | |
739 | ||
740 | static bool nvt_cir_tx_inactive(struct nvt_dev *nvt) | |
741 | { | |
742 | unsigned long flags; | |
743 | bool tx_inactive; | |
744 | u8 tx_state; | |
745 | ||
746 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
747 | tx_state = nvt->tx.tx_state; | |
748 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
749 | ||
750 | tx_inactive = (tx_state == ST_TX_NONE); | |
751 | ||
752 | return tx_inactive; | |
753 | } | |
754 | ||
755 | /* interrupt service routine for incoming and outgoing CIR data */ | |
756 | static irqreturn_t nvt_cir_isr(int irq, void *data) | |
757 | { | |
758 | struct nvt_dev *nvt = data; | |
759 | u8 status, iren, cur_state; | |
760 | unsigned long flags; | |
761 | ||
762 | nvt_dbg_verbose("%s firing", __func__); | |
763 | ||
764 | nvt_efm_enable(nvt); | |
765 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); | |
766 | nvt_efm_disable(nvt); | |
767 | ||
768 | /* | |
769 | * Get IR Status register contents. Write 1 to ack/clear | |
770 | * | |
771 | * bit: reg name - description | |
772 | * 7: CIR_IRSTS_RDR - RX Data Ready | |
773 | * 6: CIR_IRSTS_RTR - RX FIFO Trigger Level Reach | |
774 | * 5: CIR_IRSTS_PE - Packet End | |
775 | * 4: CIR_IRSTS_RFO - RX FIFO Overrun (RDR will also be set) | |
776 | * 3: CIR_IRSTS_TE - TX FIFO Empty | |
777 | * 2: CIR_IRSTS_TTR - TX FIFO Trigger Level Reach | |
778 | * 1: CIR_IRSTS_TFU - TX FIFO Underrun | |
779 | * 0: CIR_IRSTS_GH - Min Length Detected | |
780 | */ | |
781 | status = nvt_cir_reg_read(nvt, CIR_IRSTS); | |
782 | if (!status) { | |
783 | nvt_dbg_verbose("%s exiting, IRSTS 0x0", __func__); | |
784 | nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS); | |
785 | return IRQ_RETVAL(IRQ_NONE); | |
786 | } | |
787 | ||
788 | /* ack/clear all irq flags we've got */ | |
789 | nvt_cir_reg_write(nvt, status, CIR_IRSTS); | |
790 | nvt_cir_reg_write(nvt, 0, CIR_IRSTS); | |
791 | ||
792 | /* Interrupt may be shared with CIR Wake, bail if CIR not enabled */ | |
793 | iren = nvt_cir_reg_read(nvt, CIR_IREN); | |
794 | if (!iren) { | |
795 | nvt_dbg_verbose("%s exiting, CIR not enabled", __func__); | |
796 | return IRQ_RETVAL(IRQ_NONE); | |
797 | } | |
798 | ||
799 | if (debug) | |
800 | nvt_cir_log_irqs(status, iren); | |
801 | ||
802 | if (status & CIR_IRSTS_RTR) { | |
803 | /* FIXME: add code for study/learn mode */ | |
804 | /* We only do rx if not tx'ing */ | |
805 | if (nvt_cir_tx_inactive(nvt)) | |
806 | nvt_get_rx_ir_data(nvt); | |
807 | } | |
808 | ||
809 | if (status & CIR_IRSTS_PE) { | |
810 | if (nvt_cir_tx_inactive(nvt)) | |
811 | nvt_get_rx_ir_data(nvt); | |
812 | ||
813 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
814 | ||
815 | cur_state = nvt->study_state; | |
816 | ||
817 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
818 | ||
819 | if (cur_state == ST_STUDY_NONE) | |
820 | nvt_clear_cir_fifo(nvt); | |
821 | } | |
822 | ||
823 | if (status & CIR_IRSTS_TE) | |
824 | nvt_clear_tx_fifo(nvt); | |
825 | ||
826 | if (status & CIR_IRSTS_TTR) { | |
827 | unsigned int pos, count; | |
828 | u8 tmp; | |
829 | ||
830 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
831 | ||
832 | pos = nvt->tx.cur_buf_num; | |
833 | count = nvt->tx.buf_count; | |
834 | ||
835 | /* Write data into the hardware tx fifo while pos < count */ | |
836 | if (pos < count) { | |
837 | nvt_cir_reg_write(nvt, nvt->tx.buf[pos], CIR_STXFIFO); | |
838 | nvt->tx.cur_buf_num++; | |
839 | /* Disable TX FIFO Trigger Level Reach (TTR) interrupt */ | |
840 | } else { | |
841 | tmp = nvt_cir_reg_read(nvt, CIR_IREN); | |
842 | nvt_cir_reg_write(nvt, tmp & ~CIR_IREN_TTR, CIR_IREN); | |
843 | } | |
844 | ||
845 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
846 | ||
847 | } | |
848 | ||
849 | if (status & CIR_IRSTS_TFU) { | |
850 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
851 | if (nvt->tx.tx_state == ST_TX_REPLY) { | |
852 | nvt->tx.tx_state = ST_TX_REQUEST; | |
853 | wake_up(&nvt->tx.queue); | |
854 | } | |
855 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
856 | } | |
857 | ||
858 | nvt_dbg_verbose("%s done", __func__); | |
859 | return IRQ_RETVAL(IRQ_HANDLED); | |
860 | } | |
861 | ||
862 | /* Interrupt service routine for CIR Wake */ | |
863 | static irqreturn_t nvt_cir_wake_isr(int irq, void *data) | |
864 | { | |
865 | u8 status, iren, val; | |
866 | struct nvt_dev *nvt = data; | |
867 | unsigned long flags; | |
868 | ||
869 | nvt_dbg_wake("%s firing", __func__); | |
870 | ||
871 | status = nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRSTS); | |
872 | if (!status) | |
873 | return IRQ_RETVAL(IRQ_NONE); | |
874 | ||
875 | if (status & CIR_WAKE_IRSTS_IR_PENDING) | |
876 | nvt_clear_cir_wake_fifo(nvt); | |
877 | ||
878 | nvt_cir_wake_reg_write(nvt, status, CIR_WAKE_IRSTS); | |
879 | nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IRSTS); | |
880 | ||
881 | /* Interrupt may be shared with CIR, bail if Wake not enabled */ | |
882 | iren = nvt_cir_wake_reg_read(nvt, CIR_WAKE_IREN); | |
883 | if (!iren) { | |
884 | nvt_dbg_wake("%s exiting, wake not enabled", __func__); | |
885 | return IRQ_RETVAL(IRQ_HANDLED); | |
886 | } | |
887 | ||
888 | if ((status & CIR_WAKE_IRSTS_PE) && | |
889 | (nvt->wake_state == ST_WAKE_START)) { | |
890 | while (nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY_IDX)) { | |
891 | val = nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY); | |
892 | nvt_dbg("setting wake up key: 0x%x", val); | |
893 | } | |
894 | ||
895 | nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IREN); | |
896 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
897 | nvt->wake_state = ST_WAKE_FINISH; | |
898 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
899 | } | |
900 | ||
901 | nvt_dbg_wake("%s done", __func__); | |
902 | return IRQ_RETVAL(IRQ_HANDLED); | |
903 | } | |
904 | ||
905 | static void nvt_enable_cir(struct nvt_dev *nvt) | |
906 | { | |
907 | /* set function enable flags */ | |
908 | nvt_cir_reg_write(nvt, CIR_IRCON_TXEN | CIR_IRCON_RXEN | | |
909 | CIR_IRCON_RXINV | CIR_IRCON_SAMPLE_PERIOD_SEL, | |
910 | CIR_IRCON); | |
911 | ||
912 | nvt_efm_enable(nvt); | |
913 | ||
914 | /* enable the CIR logical device */ | |
915 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); | |
916 | nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN); | |
917 | ||
918 | nvt_efm_disable(nvt); | |
919 | ||
920 | /* clear all pending interrupts */ | |
921 | nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS); | |
922 | ||
923 | /* enable interrupts */ | |
fbdc781c | 924 | nvt_set_cir_iren(nvt); |
6d2f5c27 JW |
925 | } |
926 | ||
927 | static void nvt_disable_cir(struct nvt_dev *nvt) | |
928 | { | |
929 | /* disable CIR interrupts */ | |
930 | nvt_cir_reg_write(nvt, 0, CIR_IREN); | |
931 | ||
932 | /* clear any and all pending interrupts */ | |
933 | nvt_cir_reg_write(nvt, 0xff, CIR_IRSTS); | |
934 | ||
935 | /* clear all function enable flags */ | |
936 | nvt_cir_reg_write(nvt, 0, CIR_IRCON); | |
937 | ||
938 | /* clear hardware rx and tx fifos */ | |
939 | nvt_clear_cir_fifo(nvt); | |
940 | nvt_clear_tx_fifo(nvt); | |
941 | ||
942 | nvt_efm_enable(nvt); | |
943 | ||
944 | /* disable the CIR logical device */ | |
945 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); | |
946 | nvt_cr_write(nvt, LOGICAL_DEV_DISABLE, CR_LOGICAL_DEV_EN); | |
947 | ||
948 | nvt_efm_disable(nvt); | |
949 | } | |
950 | ||
951 | static int nvt_open(void *data) | |
952 | { | |
953 | struct nvt_dev *nvt = (struct nvt_dev *)data; | |
954 | unsigned long flags; | |
955 | ||
956 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
957 | nvt->in_use = true; | |
958 | nvt_enable_cir(nvt); | |
959 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
960 | ||
961 | return 0; | |
962 | } | |
963 | ||
964 | static void nvt_close(void *data) | |
965 | { | |
966 | struct nvt_dev *nvt = (struct nvt_dev *)data; | |
967 | unsigned long flags; | |
968 | ||
969 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
970 | nvt->in_use = false; | |
971 | nvt_disable_cir(nvt); | |
972 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
973 | } | |
974 | ||
975 | /* Allocate memory, probe hardware, and initialize everything */ | |
976 | static int nvt_probe(struct pnp_dev *pdev, const struct pnp_device_id *dev_id) | |
977 | { | |
978 | struct nvt_dev *nvt = NULL; | |
979 | struct input_dev *rdev = NULL; | |
980 | struct ir_dev_props *props = NULL; | |
981 | int ret = -ENOMEM; | |
982 | ||
983 | nvt = kzalloc(sizeof(struct nvt_dev), GFP_KERNEL); | |
984 | if (!nvt) | |
985 | return ret; | |
986 | ||
987 | props = kzalloc(sizeof(struct ir_dev_props), GFP_KERNEL); | |
988 | if (!props) | |
989 | goto failure; | |
990 | ||
991 | /* input device for IR remote (and tx) */ | |
992 | rdev = input_allocate_device(); | |
993 | if (!rdev) | |
994 | goto failure; | |
995 | ||
996 | ret = -ENODEV; | |
997 | /* validate pnp resources */ | |
998 | if (!pnp_port_valid(pdev, 0) || | |
999 | pnp_port_len(pdev, 0) < CIR_IOREG_LENGTH) { | |
1000 | dev_err(&pdev->dev, "IR PNP Port not valid!\n"); | |
1001 | goto failure; | |
1002 | } | |
1003 | ||
1004 | if (!pnp_irq_valid(pdev, 0)) { | |
1005 | dev_err(&pdev->dev, "PNP IRQ not valid!\n"); | |
1006 | goto failure; | |
1007 | } | |
1008 | ||
1009 | if (!pnp_port_valid(pdev, 1) || | |
1010 | pnp_port_len(pdev, 1) < CIR_IOREG_LENGTH) { | |
1011 | dev_err(&pdev->dev, "Wake PNP Port not valid!\n"); | |
1012 | goto failure; | |
1013 | } | |
1014 | ||
1015 | nvt->cir_addr = pnp_port_start(pdev, 0); | |
1016 | nvt->cir_irq = pnp_irq(pdev, 0); | |
1017 | ||
1018 | nvt->cir_wake_addr = pnp_port_start(pdev, 1); | |
1019 | /* irq is always shared between cir and cir wake */ | |
1020 | nvt->cir_wake_irq = nvt->cir_irq; | |
1021 | ||
1022 | nvt->cr_efir = CR_EFIR; | |
1023 | nvt->cr_efdr = CR_EFDR; | |
1024 | ||
1025 | spin_lock_init(&nvt->nvt_lock); | |
1026 | spin_lock_init(&nvt->tx.lock); | |
4651918a | 1027 | init_ir_raw_event(&nvt->rawir); |
6d2f5c27 JW |
1028 | |
1029 | ret = -EBUSY; | |
1030 | /* now claim resources */ | |
1031 | if (!request_region(nvt->cir_addr, | |
1032 | CIR_IOREG_LENGTH, NVT_DRIVER_NAME)) | |
1033 | goto failure; | |
1034 | ||
1035 | if (request_irq(nvt->cir_irq, nvt_cir_isr, IRQF_SHARED, | |
1036 | NVT_DRIVER_NAME, (void *)nvt)) | |
1037 | goto failure; | |
1038 | ||
1039 | if (!request_region(nvt->cir_wake_addr, | |
1040 | CIR_IOREG_LENGTH, NVT_DRIVER_NAME)) | |
1041 | goto failure; | |
1042 | ||
1043 | if (request_irq(nvt->cir_wake_irq, nvt_cir_wake_isr, IRQF_SHARED, | |
1044 | NVT_DRIVER_NAME, (void *)nvt)) | |
1045 | goto failure; | |
1046 | ||
1047 | pnp_set_drvdata(pdev, nvt); | |
1048 | nvt->pdev = pdev; | |
1049 | ||
1050 | init_waitqueue_head(&nvt->tx.queue); | |
1051 | ||
1052 | ret = nvt_hw_detect(nvt); | |
1053 | if (ret) | |
1054 | goto failure; | |
1055 | ||
1056 | /* Initialize CIR & CIR Wake Logical Devices */ | |
1057 | nvt_efm_enable(nvt); | |
1058 | nvt_cir_ldev_init(nvt); | |
1059 | nvt_cir_wake_ldev_init(nvt); | |
1060 | nvt_efm_disable(nvt); | |
1061 | ||
1062 | /* Initialize CIR & CIR Wake Config Registers */ | |
1063 | nvt_cir_regs_init(nvt); | |
1064 | nvt_cir_wake_regs_init(nvt); | |
1065 | ||
1066 | /* Set up ir-core props */ | |
1067 | props->priv = nvt; | |
1068 | props->driver_type = RC_DRIVER_IR_RAW; | |
1069 | props->allowed_protos = IR_TYPE_ALL; | |
1070 | props->open = nvt_open; | |
1071 | props->close = nvt_close; | |
1072 | #if 0 | |
1073 | props->min_timeout = XYZ; | |
1074 | props->max_timeout = XYZ; | |
1075 | props->timeout = XYZ; | |
1076 | /* rx resolution is hardwired to 50us atm, 1, 25, 100 also possible */ | |
1077 | props->rx_resolution = XYZ; | |
1078 | ||
1079 | /* tx bits */ | |
1080 | props->tx_resolution = XYZ; | |
1081 | #endif | |
1082 | props->tx_ir = nvt_tx_ir; | |
1083 | props->s_tx_carrier = nvt_set_tx_carrier; | |
1084 | ||
1085 | rdev->name = "Nuvoton w836x7hg Infrared Remote Transceiver"; | |
1086 | rdev->id.bustype = BUS_HOST; | |
1087 | rdev->id.vendor = PCI_VENDOR_ID_WINBOND2; | |
1088 | rdev->id.product = nvt->chip_major; | |
1089 | rdev->id.version = nvt->chip_minor; | |
1090 | ||
1091 | nvt->props = props; | |
1092 | nvt->rdev = rdev; | |
1093 | ||
1094 | device_set_wakeup_capable(&pdev->dev, 1); | |
1095 | device_set_wakeup_enable(&pdev->dev, 1); | |
1096 | ||
1097 | ret = ir_input_register(rdev, RC_MAP_RC6_MCE, props, NVT_DRIVER_NAME); | |
1098 | if (ret) | |
1099 | goto failure; | |
1100 | ||
1101 | nvt_pr(KERN_NOTICE, "driver has been successfully loaded\n"); | |
1102 | if (debug) { | |
1103 | cir_dump_regs(nvt); | |
1104 | cir_wake_dump_regs(nvt); | |
1105 | } | |
1106 | ||
1107 | return 0; | |
1108 | ||
1109 | failure: | |
1110 | if (nvt->cir_irq) | |
1111 | free_irq(nvt->cir_irq, nvt); | |
1112 | if (nvt->cir_addr) | |
1113 | release_region(nvt->cir_addr, CIR_IOREG_LENGTH); | |
1114 | ||
1115 | if (nvt->cir_wake_irq) | |
1116 | free_irq(nvt->cir_wake_irq, nvt); | |
1117 | if (nvt->cir_wake_addr) | |
1118 | release_region(nvt->cir_wake_addr, CIR_IOREG_LENGTH); | |
1119 | ||
1120 | input_free_device(rdev); | |
1121 | kfree(props); | |
1122 | kfree(nvt); | |
1123 | ||
1124 | return ret; | |
1125 | } | |
1126 | ||
1127 | static void __devexit nvt_remove(struct pnp_dev *pdev) | |
1128 | { | |
1129 | struct nvt_dev *nvt = pnp_get_drvdata(pdev); | |
1130 | unsigned long flags; | |
1131 | ||
1132 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
1133 | /* disable CIR */ | |
1134 | nvt_cir_reg_write(nvt, 0, CIR_IREN); | |
1135 | nvt_disable_cir(nvt); | |
1136 | /* enable CIR Wake (for IR power-on) */ | |
1137 | nvt_enable_wake(nvt); | |
1138 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
1139 | ||
1140 | /* free resources */ | |
1141 | free_irq(nvt->cir_irq, nvt); | |
1142 | free_irq(nvt->cir_wake_irq, nvt); | |
1143 | release_region(nvt->cir_addr, CIR_IOREG_LENGTH); | |
1144 | release_region(nvt->cir_wake_addr, CIR_IOREG_LENGTH); | |
1145 | ||
1146 | ir_input_unregister(nvt->rdev); | |
1147 | ||
1148 | kfree(nvt->props); | |
1149 | kfree(nvt); | |
1150 | } | |
1151 | ||
1152 | static int nvt_suspend(struct pnp_dev *pdev, pm_message_t state) | |
1153 | { | |
1154 | struct nvt_dev *nvt = pnp_get_drvdata(pdev); | |
1155 | unsigned long flags; | |
1156 | ||
1157 | nvt_dbg("%s called", __func__); | |
1158 | ||
1159 | /* zero out misc state tracking */ | |
1160 | spin_lock_irqsave(&nvt->nvt_lock, flags); | |
1161 | nvt->study_state = ST_STUDY_NONE; | |
1162 | nvt->wake_state = ST_WAKE_NONE; | |
1163 | spin_unlock_irqrestore(&nvt->nvt_lock, flags); | |
1164 | ||
1165 | spin_lock_irqsave(&nvt->tx.lock, flags); | |
1166 | nvt->tx.tx_state = ST_TX_NONE; | |
1167 | spin_unlock_irqrestore(&nvt->tx.lock, flags); | |
1168 | ||
1169 | /* disable all CIR interrupts */ | |
1170 | nvt_cir_reg_write(nvt, 0, CIR_IREN); | |
1171 | ||
1172 | nvt_efm_enable(nvt); | |
1173 | ||
1174 | /* disable cir logical dev */ | |
1175 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); | |
1176 | nvt_cr_write(nvt, LOGICAL_DEV_DISABLE, CR_LOGICAL_DEV_EN); | |
1177 | ||
1178 | nvt_efm_disable(nvt); | |
1179 | ||
1180 | /* make sure wake is enabled */ | |
1181 | nvt_enable_wake(nvt); | |
1182 | ||
1183 | return 0; | |
1184 | } | |
1185 | ||
1186 | static int nvt_resume(struct pnp_dev *pdev) | |
1187 | { | |
1188 | int ret = 0; | |
1189 | struct nvt_dev *nvt = pnp_get_drvdata(pdev); | |
1190 | ||
1191 | nvt_dbg("%s called", __func__); | |
1192 | ||
1193 | /* open interrupt */ | |
fbdc781c | 1194 | nvt_set_cir_iren(nvt); |
6d2f5c27 JW |
1195 | |
1196 | /* Enable CIR logical device */ | |
1197 | nvt_efm_enable(nvt); | |
1198 | nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); | |
1199 | nvt_cr_write(nvt, LOGICAL_DEV_ENABLE, CR_LOGICAL_DEV_EN); | |
1200 | ||
1201 | nvt_efm_disable(nvt); | |
1202 | ||
1203 | nvt_cir_regs_init(nvt); | |
1204 | nvt_cir_wake_regs_init(nvt); | |
1205 | ||
1206 | return ret; | |
1207 | } | |
1208 | ||
1209 | static void nvt_shutdown(struct pnp_dev *pdev) | |
1210 | { | |
1211 | struct nvt_dev *nvt = pnp_get_drvdata(pdev); | |
1212 | nvt_enable_wake(nvt); | |
1213 | } | |
1214 | ||
1215 | static const struct pnp_device_id nvt_ids[] = { | |
1216 | { "WEC0530", 0 }, /* CIR */ | |
1217 | { "NTN0530", 0 }, /* CIR for new chip's pnp id*/ | |
1218 | { "", 0 }, | |
1219 | }; | |
1220 | ||
1221 | static struct pnp_driver nvt_driver = { | |
1222 | .name = NVT_DRIVER_NAME, | |
1223 | .id_table = nvt_ids, | |
1224 | .flags = PNP_DRIVER_RES_DO_NOT_CHANGE, | |
1225 | .probe = nvt_probe, | |
1226 | .remove = __devexit_p(nvt_remove), | |
1227 | .suspend = nvt_suspend, | |
1228 | .resume = nvt_resume, | |
1229 | .shutdown = nvt_shutdown, | |
1230 | }; | |
1231 | ||
1232 | int nvt_init(void) | |
1233 | { | |
1234 | return pnp_register_driver(&nvt_driver); | |
1235 | } | |
1236 | ||
1237 | void nvt_exit(void) | |
1238 | { | |
1239 | pnp_unregister_driver(&nvt_driver); | |
1240 | } | |
1241 | ||
1242 | module_param(debug, int, S_IRUGO | S_IWUSR); | |
1243 | MODULE_PARM_DESC(debug, "Enable debugging output"); | |
1244 | ||
1245 | MODULE_DEVICE_TABLE(pnp, nvt_ids); | |
1246 | MODULE_DESCRIPTION("Nuvoton W83667HG-A & W83677HG-I CIR driver"); | |
1247 | ||
1248 | MODULE_AUTHOR("Jarod Wilson <jarod@redhat.com>"); | |
1249 | MODULE_LICENSE("GPL"); | |
1250 | ||
1251 | module_init(nvt_init); | |
1252 | module_exit(nvt_exit); |