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86fcc7d76d8988e39a18fbe700ecda23907748fd
[openwrt.git] / target / linux / brcm63xx / patches-2.6.33 / 240-spi.patch
1 --- a/arch/mips/bcm63xx/cpu.c
2 +++ b/arch/mips/bcm63xx/cpu.c
3 @@ -55,6 +55,7 @@ static const unsigned long bcm96338_regs
4
5 static const int bcm96338_irqs[] = {
6 [IRQ_TIMER] = BCM_6338_TIMER_IRQ,
7 + [IRQ_SPI] = BCM_6338_SPI_IRQ,
8 [IRQ_UART0] = BCM_6338_UART0_IRQ,
9 [IRQ_DSL] = BCM_6338_DSL_IRQ,
10 [IRQ_ENET0] = BCM_6338_ENET0_IRQ,
11 @@ -127,6 +128,7 @@ static const unsigned long bcm96348_regs
12
13 static const int bcm96348_irqs[] = {
14 [IRQ_TIMER] = BCM_6348_TIMER_IRQ,
15 + [IRQ_SPI] = BCM_6348_SPI_IRQ,
16 [IRQ_UART0] = BCM_6348_UART0_IRQ,
17 [IRQ_DSL] = BCM_6348_DSL_IRQ,
18 [IRQ_ENET0] = BCM_6348_ENET0_IRQ,
19 @@ -169,6 +171,7 @@ static const unsigned long bcm96358_regs
20
21 static const int bcm96358_irqs[] = {
22 [IRQ_TIMER] = BCM_6358_TIMER_IRQ,
23 + [IRQ_SPI] = BCM_6358_SPI_IRQ,
24 [IRQ_UART0] = BCM_6358_UART0_IRQ,
25 [IRQ_DSL] = BCM_6358_DSL_IRQ,
26 [IRQ_ENET0] = BCM_6358_ENET0_IRQ,
27 --- /dev/null
28 +++ b/arch/mips/bcm63xx/dev-spi.c
29 @@ -0,0 +1,60 @@
30 +/*
31 + * This file is subject to the terms and conditions of the GNU General Public
32 + * License. See the file "COPYING" in the main directory of this archive
33 + * for more details.
34 + *
35 + * Copyright (C) 2009 Florian Fainelli <florian@openwrt.org>
36 + */
37 +
38 +#include <linux/init.h>
39 +#include <linux/kernel.h>
40 +#include <linux/platform_device.h>
41 +
42 +#include <bcm63xx_cpu.h>
43 +#include <bcm63xx_dev_spi.h>
44 +#include <bcm63xx_regs.h>
45 +
46 +static struct resource spi_resources[] = {
47 + {
48 + .start = -1, /* filled at runtime */
49 + .end = -1, /* filled at runtime */
50 + .flags = IORESOURCE_MEM,
51 + },
52 + {
53 + .start = -1, /* filled at runtime */
54 + .flags = IORESOURCE_IRQ,
55 + },
56 +};
57 +
58 +static struct bcm63xx_spi_pdata spi_pdata = {
59 + .bus_num = 0,
60 + .num_chipselect = 4,
61 + .speed_hz = 50000000, /* Fclk */
62 +};
63 +
64 +static struct platform_device bcm63xx_spi_device = {
65 + .name = "bcm63xx-spi",
66 + .id = 0,
67 + .num_resources = ARRAY_SIZE(spi_resources),
68 + .resource = spi_resources,
69 + .dev = {
70 + .platform_data = &spi_pdata,
71 + },
72 +};
73 +
74 +int __init bcm63xx_spi_register(void)
75 +{
76 + spi_resources[0].start = bcm63xx_regset_address(RSET_SPI);
77 + spi_resources[0].end = spi_resources[0].start;
78 + spi_resources[0].end += RSET_SPI_SIZE - 1;
79 + spi_resources[1].start = bcm63xx_get_irq_number(IRQ_SPI);
80 +
81 + /* Fill in platform data */
82 + if (BCMCPU_IS_6338() || BCMCPU_IS_6348())
83 + spi_pdata.fifo_size = SPI_BCM_6338_SPI_MSG_DATA_SIZE;
84 +
85 + if (BCMCPU_IS_6358())
86 + spi_pdata.fifo_size = SPI_BCM_6358_SPI_MSG_DATA_SIZE;
87 +
88 + return platform_device_register(&bcm63xx_spi_device);
89 +}
90 --- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_cpu.h
91 +++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_cpu.h
92 @@ -108,6 +108,7 @@ enum bcm63xx_regs_set {
93 #define RSET_WDT_SIZE 12
94 #define RSET_ENET_SIZE 2048
95 #define RSET_ENETDMA_SIZE 2048
96 +#define RSET_SPI_SIZE 256
97 #define RSET_UART_SIZE 24
98 #define RSET_UDC_SIZE 256
99 #define RSET_OHCI_SIZE 256
100 @@ -428,6 +429,7 @@ static inline unsigned long bcm63xx_regs
101 */
102 enum bcm63xx_irq {
103 IRQ_TIMER = 0,
104 + IRQ_SPI,
105 IRQ_UART0,
106 IRQ_DSL,
107 IRQ_UDC0,
108 @@ -493,6 +495,7 @@ enum bcm63xx_irq {
109 * 6348 irqs
110 */
111 #define BCM_6348_TIMER_IRQ (IRQ_INTERNAL_BASE + 0)
112 +#define BCM_6348_SPI_IRQ (IRQ_INTERNAL_BASE + 1)
113 #define BCM_6348_UART0_IRQ (IRQ_INTERNAL_BASE + 2)
114 #define BCM_6348_DSL_IRQ (IRQ_INTERNAL_BASE + 4)
115 #define BCM_6348_UDC0_IRQ (IRQ_INTERNAL_BASE + 6)
116 @@ -517,6 +520,7 @@ enum bcm63xx_irq {
117 * 6358 irqs
118 */
119 #define BCM_6358_TIMER_IRQ (IRQ_INTERNAL_BASE + 0)
120 +#define BCM_6358_SPI_IRQ (IRQ_INTERNAL_BASE + 1)
121 #define BCM_6358_UART0_IRQ (IRQ_INTERNAL_BASE + 2)
122 #define BCM_6358_OHCI0_IRQ (IRQ_INTERNAL_BASE + 5)
123 #define BCM_6358_ENET1_IRQ (IRQ_INTERNAL_BASE + 6)
124 --- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
125 +++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
126 @@ -769,5 +769,117 @@
127 #define DMIPSPLLCFG_N2_SHIFT 29
128 #define DMIPSPLLCFG_N2_MASK (0x7 << DMIPSPLLCFG_N2_SHIFT)
129
130 +/*************************************************************************
131 + * _REG relative to RSET_SPI
132 + *************************************************************************/
133 +
134 +/* BCM 6338 SPI core */
135 +#define SPI_BCM_6338_SPI_CMD 0x00 /* 16-bits register */
136 +#define SPI_BCM_6338_SPI_INT_STATUS 0x02
137 +#define SPI_BCM_6338_SPI_MASK_INT_ST 0x03
138 +#define SPI_BCM_6338_SPI_INT_MASK 0x04
139 +#define SPI_BCM_6338_SPI_ST 0x05
140 +#define SPI_BCM_6338_SPI_CLK_CFG 0x06
141 +#define SPI_BCM_6338_SPI_FILL_BYTE 0x07
142 +#define SPI_BCM_6338_SPI_MSG_TAIL 0x09
143 +#define SPI_BCM_6338_SPI_RX_TAIL 0x0b
144 +#define SPI_BCM_6338_SPI_MSG_CTL 0x40
145 +#define SPI_BCM_6338_SPI_MSG_DATA 0x41
146 +#define SPI_BCM_6338_SPI_MSG_DATA_SIZE 0x3f
147 +#define SPI_BCM_6338_SPI_RX_DATA 0x80
148 +#define SPI_BCM_6338_SPI_RX_DATA_SIZE 0x3f
149 +
150 +/* BCM 6348 SPI core */
151 +#define SPI_BCM_6348_SPI_MASK_INT_ST 0x00
152 +#define SPI_BCM_6348_SPI_INT_STATUS 0x01
153 +#define SPI_BCM_6348_SPI_CMD 0x02 /* 16-bits register */
154 +#define SPI_BCM_6348_SPI_FILL_BYTE 0x04
155 +#define SPI_BCM_6348_SPI_CLK_CFG 0x05
156 +#define SPI_BCM_6348_SPI_ST 0x06
157 +#define SPI_BCM_6348_SPI_INT_MASK 0x07
158 +#define SPI_BCM_6348_SPI_RX_TAIL 0x08
159 +#define SPI_BCM_6348_SPI_MSG_TAIL 0x10
160 +#define SPI_BCM_6348_SPI_MSG_DATA 0x40
161 +#define SPI_BCM_6348_SPI_MSG_CTL 0x42
162 +#define SPI_BCM_6348_SPI_MSG_DATA_SIZE 0x3f
163 +#define SPI_BCM_6348_SPI_RX_DATA 0x80
164 +#define SPI_BCM_6348_SPI_RX_DATA_SIZE 0x3f
165 +
166 +/* BCM 6358 SPI core */
167 +#define SPI_BCM_6358_MSG_CTL 0x00 /* 16-bits register */
168 +
169 +#define SPI_BCM_6358_SPI_MSG_DATA 0x02
170 +#define SPI_BCM_6358_SPI_MSG_DATA_SIZE 0x21e
171 +
172 +#define SPI_BCM_6358_SPI_RX_DATA 0x400
173 +#define SPI_BCM_6358_SPI_RX_DATA_SIZE 0x220
174 +
175 +#define SPI_BCM_6358_SPI_CMD 0x700 /* 16-bits register */
176 +
177 +#define SPI_BCM_6358_SPI_INT_STATUS 0x702
178 +#define SPI_BCM_6358_SPI_MASK_INT_ST 0x703
179 +
180 +#define SPI_BCM_6358_SPI_INT_MASK 0x704
181 +
182 +#define SPI_BCM_6358_SPI_STATUS 0x705
183 +
184 +#define SPI_BCM_6358_SPI_CLK_CFG 0x706
185 +
186 +#define SPI_BCM_6358_SPI_FILL_BYTE 0x707
187 +#define SPI_BCM_6358_SPI_MSG_TAIL 0x709
188 +#define SPI_BCM_6358_SPI_RX_TAIL 0x70B
189 +
190 +/* Shared SPI definitions */
191 +
192 +/* Message configuration */
193 +#define SPI_FD_RW 0x00
194 +#define SPI_HD_W 0x01
195 +#define SPI_HD_R 0x02
196 +#define SPI_BYTE_CNT_SHIFT 0
197 +#define SPI_MSG_TYPE_SHIFT 14
198 +
199 +/* Command */
200 +#define SPI_CMD_NOOP 0x01
201 +#define SPI_CMD_SOFT_RESET 0x02
202 +#define SPI_CMD_HARD_RESET 0x04
203 +#define SPI_CMD_START_IMMEDIATE 0x08
204 +#define SPI_CMD_COMMAND_SHIFT 0
205 +#define SPI_CMD_COMMAND_MASK 0x000f
206 +#define SPI_CMD_DEVICE_ID_SHIFT 4
207 +#define SPI_CMD_PREPEND_BYTE_CNT_SHIFT 8
208 +#define SPI_CMD_ONE_BYTE_SHIFT 11
209 +#define SPI_CMD_ONE_WIRE_SHIFT 12
210 +#define SPI_DEV_ID_0 0
211 +#define SPI_DEV_ID_1 1
212 +#define SPI_DEV_ID_2 2
213 +#define SPI_DEV_ID_3 3
214 +
215 +/* Interrupt mask */
216 +#define SPI_INTR_CMD_DONE 0x01
217 +#define SPI_INTR_RX_OVERFLOW 0x02
218 +#define SPI_INTR_TX_UNDERFLOW 0x04
219 +#define SPI_INTR_TX_OVERFLOW 0x08
220 +#define SPI_INTR_RX_UNDERFLOW 0x10
221 +#define SPI_INTR_CLEAR_ALL 0x1f
222 +
223 +/* Status */
224 +#define SPI_RX_EMPTY 0x02
225 +#define SPI_CMD_BUSY 0x04
226 +#define SPI_SERIAL_BUSY 0x08
227 +
228 +/* Clock configuration */
229 +#define SPI_CLK_20MHZ 0x00
230 +#define SPI_CLK_0_391MHZ 0x01
231 +#define SPI_CLK_0_781MHZ 0x02 /* default */
232 +#define SPI_CLK_1_563MHZ 0x03
233 +#define SPI_CLK_3_125MHZ 0x04
234 +#define SPI_CLK_6_250MHZ 0x05
235 +#define SPI_CLK_12_50MHZ 0x06
236 +#define SPI_CLK_25MHZ 0x07
237 +#define SPI_CLK_MASK 0x07
238 +#define SPI_SSOFFTIME_MASK 0x38
239 +#define SPI_SSOFFTIME_SHIFT 3
240 +#define SPI_BYTE_SWAP 0x80
241 +
242 #endif /* BCM63XX_REGS_H_ */
243
244 --- /dev/null
245 +++ b/drivers/spi/bcm63xx_spi.c
246 @@ -0,0 +1,628 @@
247 +/*
248 + * Broadcom BCM63xx SPI controller support
249 + *
250 + * Copyright (C) 2009 Florian Fainelli <florian@openwrt.org>
251 + *
252 + * This program is free software; you can redistribute it and/or
253 + * modify it under the terms of the GNU General Public License
254 + * as published by the Free Software Foundation; either version 2
255 + * of the License, or (at your option) any later version.
256 + *
257 + * This program is distributed in the hope that it will be useful,
258 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
259 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
260 + * GNU General Public License for more details.
261 + *
262 + * You should have received a copy of the GNU General Public License
263 + * along with this program; if not, write to the
264 + * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
265 + */
266 +
267 +#include <linux/kernel.h>
268 +#include <linux/init.h>
269 +#include <linux/clk.h>
270 +#include <linux/module.h>
271 +#include <linux/platform_device.h>
272 +#include <linux/delay.h>
273 +#include <linux/interrupt.h>
274 +#include <linux/spi/spi.h>
275 +#include <linux/spi/spi_bitbang.h>
276 +#include <linux/gpio.h>
277 +#include <linux/completion.h>
278 +#include <linux/err.h>
279 +
280 +#include <bcm63xx_io.h>
281 +#include <bcm63xx_regs.h>
282 +#include <bcm63xx_dev_spi.h>
283 +
284 +#define PFX KBUILD_MODNAME
285 +#define DRV_VER "0.1.2"
286 +
287 +enum bcm63xx_regs_spi {
288 + SPI_CMD,
289 + SPI_INT_STATUS,
290 + SPI_INT_MASK_ST,
291 + SPI_INT_MASK,
292 + SPI_ST,
293 + SPI_CLK_CFG,
294 + SPI_FILL_BYTE,
295 + SPI_MSG_TAIL,
296 + SPI_RX_TAIL,
297 + SPI_MSG_CTL,
298 + SPI_MSG_DATA,
299 + SPI_RX_DATA,
300 +};
301 +
302 +/*
303 + * register offsets
304 + */
305 +static const unsigned long bcm96338_regs_spi[] = {
306 + [SPI_CMD] = SPI_BCM_6338_SPI_CMD,
307 + [SPI_INT_STATUS] = SPI_BCM_6338_SPI_INT_STATUS,
308 + [SPI_INT_MASK_ST] = SPI_BCM_6338_SPI_MASK_INT_ST,
309 + [SPI_INT_MASK] = SPI_BCM_6338_SPI_INT_MASK,
310 + [SPI_ST] = SPI_BCM_6338_SPI_ST,
311 + [SPI_CLK_CFG] = SPI_BCM_6338_SPI_CLK_CFG,
312 + [SPI_FILL_BYTE] = SPI_BCM_6338_SPI_FILL_BYTE,
313 + [SPI_MSG_TAIL] = SPI_BCM_6338_SPI_MSG_TAIL,
314 + [SPI_RX_TAIL] = SPI_BCM_6338_SPI_RX_TAIL,
315 + [SPI_MSG_CTL] = SPI_BCM_6338_SPI_MSG_CTL,
316 + [SPI_MSG_DATA] = SPI_BCM_6338_SPI_MSG_DATA,
317 + [SPI_RX_DATA] = SPI_BCM_6338_SPI_RX_DATA,
318 +};
319 +
320 +static const unsigned long bcm96348_regs_spi[] = {
321 + [SPI_CMD] = SPI_BCM_6348_SPI_CMD,
322 + [SPI_INT_STATUS] = SPI_BCM_6348_SPI_INT_STATUS,
323 + [SPI_INT_MASK_ST] = SPI_BCM_6348_SPI_MASK_INT_ST,
324 + [SPI_INT_MASK] = SPI_BCM_6348_SPI_INT_MASK,
325 + [SPI_ST] = SPI_BCM_6348_SPI_ST,
326 + [SPI_CLK_CFG] = SPI_BCM_6348_SPI_CLK_CFG,
327 + [SPI_FILL_BYTE] = SPI_BCM_6348_SPI_FILL_BYTE,
328 + [SPI_MSG_TAIL] = SPI_BCM_6348_SPI_MSG_TAIL,
329 + [SPI_RX_TAIL] = SPI_BCM_6348_SPI_RX_TAIL,
330 + [SPI_MSG_CTL] = SPI_BCM_6348_SPI_MSG_CTL,
331 + [SPI_MSG_DATA] = SPI_BCM_6348_SPI_MSG_DATA,
332 + [SPI_RX_DATA] = SPI_BCM_6348_SPI_RX_DATA,
333 +};
334 +
335 +static const unsigned long bcm96358_regs_spi[] = {
336 + [SPI_CMD] = SPI_BCM_6358_SPI_CMD,
337 + [SPI_INT_STATUS] = SPI_BCM_6358_SPI_INT_STATUS,
338 + [SPI_INT_MASK_ST] = SPI_BCM_6358_SPI_MASK_INT_ST,
339 + [SPI_INT_MASK] = SPI_BCM_6358_SPI_INT_MASK,
340 + [SPI_ST] = SPI_BCM_6358_SPI_STATUS,
341 + [SPI_CLK_CFG] = SPI_BCM_6358_SPI_CLK_CFG,
342 + [SPI_FILL_BYTE] = SPI_BCM_6358_SPI_FILL_BYTE,
343 + [SPI_MSG_TAIL] = SPI_BCM_6358_SPI_MSG_TAIL,
344 + [SPI_RX_TAIL] = SPI_BCM_6358_SPI_RX_TAIL,
345 + [SPI_MSG_CTL] = SPI_BCM_6358_MSG_CTL,
346 + [SPI_MSG_DATA] = SPI_BCM_6358_SPI_MSG_DATA,
347 + [SPI_RX_DATA] = SPI_BCM_6358_SPI_RX_DATA,
348 +};
349 +
350 +
351 +#ifdef BCMCPU_RUNTIME_DETECT
352 +static const unsigned long *bcm63xx_regs_spi;
353 +
354 +static __init void bcm63xx_spi_regs_init(void)
355 +{
356 + if (BCMCPU_IS_6338())
357 + bcm63xx_regs_spi = bcm96338_regs_spi;
358 + if (BCMCPU_IS_6348())
359 + bcm63xx_regs_spi = bcm96348_regs_spi;
360 + if (BCMCPU_IS_6358())
361 + bcm63xx_regs_spi = bcm96358_regs_spi;
362 +}
363 +#else
364 +static __init void bcm63xx_spi_regs_init(void) { }
365 +#endif
366 +
367 +static inline unsigned long bcm63xx_spireg(enum bcm63xx_regs_spi reg)
368 +{
369 +#ifdef BCMCPU_RUNTIME_DETECT
370 + return bcm63xx_regs_spi[reg];
371 +#else
372 +#ifdef CONFIG_BCM63XX_CPU_6338
373 +switch (reg) {
374 + case SPI_CMD:
375 + return SPI_BCM_6338_SPI_CMD;
376 + case SPI_INT_STATUS:
377 + return SPI_BCM_6338_SPI_INT_STATUS;
378 + case SPI_INT_MASK_ST:
379 + return SPI_BCM_6338_SPI_MASK_INT_ST;
380 + case SPI_INT_MASK:
381 + return SPI_BCM_6338_SPI_INT_MASK;
382 + case SPI_ST:
383 + return SPI_BCM_6338_SPI_ST;
384 + case SPI_CLK_CFG:
385 + return SPI_BCM_6338_SPI_CLK_CFG;
386 + case SPI_FILL_BYTE:
387 + return SPI_BCM_6338_SPI_FILL_BYTE;
388 + case SPI_MSG_TAIL:
389 + return SPI_BCM_6338_SPI_MSG_TAIL;
390 + case SPI_RX_TAIL:
391 + return SPI_BCM_6338_SPI_RX_TAIL;
392 + case SPI_MSG_CTL:
393 + return SPI_BCM_6338_SPI_MSG_CTL;
394 + case SPI_MSG_DATA:
395 + return SPI_BCM_6338_SPI_MSG_DATA;
396 + case SPI_RX_DATA:
397 + return SPI_BCM_6338_SPI_RX_DATA;
398 +}
399 +#endif
400 +#ifdef CONFIG_BCM63XX_CPU_6348
401 +switch (reg) {
402 + case SPI_CMD:
403 + return SPI_BCM_6348_SPI_CMD;
404 + case SPI_INT_MASK_ST:
405 + return SPI_BCM_6348_SPI_MASK_INT_ST;
406 + case SPI_INT_MASK:
407 + return SPI_BCM_6348_SPI_INT_MASK;
408 + case SPI_INT_STATUS:
409 + return SPI_BCM_6348_SPI_INT_STATUS;
410 + case SPI_ST:
411 + return SPI_BCM_6348_SPI_ST;
412 + case SPI_CLK_CFG:
413 + return SPI_BCM_6348_SPI_CLK_CFG;
414 + case SPI_FILL_BYTE:
415 + return SPI_BCM_6348_SPI_FILL_BYTE;
416 + case SPI_MSG_TAIL:
417 + return SPI_BCM_6348_SPI_MSG_TAIL;
418 + case SPI_RX_TAIL:
419 + return SPI_BCM_6348_SPI_RX_TAIL;
420 + case SPI_MSG_CTL:
421 + return SPI_BCM_6348_SPI_MSG_CTL;
422 + case SPI_MSG_DATA:
423 + return SPI_BCM_6348_SPI_MSG_DATA;
424 + case SPI_RX_DATA:
425 + return SPI_BCM_6348_SPI_RX_DATA;
426 +}
427 +#endif
428 +#ifdef CONFIG_BCM63XX_CPU_6358
429 +switch (reg) {
430 + case SPI_CMD:
431 + return SPI_BCM_6358_SPI_CMD;
432 + case SPI_INT_STATUS:
433 + return SPI_BCM_6358_SPI_INT_STATUS;
434 + case SPI_INT_MASK_ST:
435 + return SPI_BCM_6358_SPI_MASK_INT_ST;
436 + case SPI_INT_MASK:
437 + return SPI_BCM_6358_SPI_INT_MASK;
438 + case SPI_ST:
439 + return SPI_BCM_6358_SPI_STATUS;
440 + case SPI_CLK_CFG:
441 + return SPI_BCM_6358_SPI_CLK_CFG;
442 + case SPI_FILL_BYTE:
443 + return SPI_BCM_6358_SPI_FILL_BYTE;
444 + case SPI_MSG_TAIL:
445 + return SPI_BCM_6358_SPI_MSG_TAIL;
446 + case SPI_RX_TAIL:
447 + return SPI_BCM_6358_SPI_RX_TAIL;
448 + case SPI_MSG_CTL:
449 + return SPI_BCM_6358_MSG_CTL;
450 + case SPI_MSG_DATA:
451 + return SPI_BCM_6358_SPI_MSG_DATA;
452 + case SPI_RX_DATA:
453 + return SPI_BCM_6358_SPI_RX_DATA;
454 +}
455 +#endif
456 +#endif
457 + return 0;
458 +}
459 +
460 +/*
461 + * helpers for the SPI register sets
462 + */
463 +#define bcm_spi_readb(b,o) bcm_readb((b) + bcm63xx_spireg(o))
464 +#define bcm_spi_readw(b,o) bcm_readw((b) + bcm63xx_spireg(o))
465 +#define bcm_spi_writeb(v,b,o) bcm_writeb((v), (b) + bcm63xx_spireg(o))
466 +#define bcm_spi_writew(v,b,o) bcm_writew((v), (b) + bcm63xx_spireg(o))
467 +
468 +struct bcm63xx_spi {
469 + /* bitbang has to be first */
470 + struct spi_bitbang bitbang;
471 + struct completion done;
472 +
473 + void __iomem *regs;
474 + int irq;
475 +
476 + /* Platform data */
477 + u32 speed_hz;
478 + unsigned fifo_size;
479 +
480 + /* Data buffers */
481 + const unsigned char *tx_ptr;
482 + unsigned char *rx_ptr;
483 + int remaining_bytes;
484 +
485 + struct clk *clk;
486 + struct resource *ioarea;
487 + struct platform_device *pdev;
488 +};
489 +
490 +static void bcm63xx_spi_chipselect(struct spi_device *spi, int is_on)
491 +{
492 + struct bcm63xx_spi *bs = spi_master_get_devdata(spi->master);
493 + u16 val;
494 +
495 + val = bcm_spi_readw(bs->regs, SPI_CMD);
496 + if (is_on == BITBANG_CS_INACTIVE)
497 + val |= SPI_CMD_NOOP;
498 + else if (is_on == BITBANG_CS_ACTIVE)
499 + val |= (1 << spi->chip_select << SPI_CMD_DEVICE_ID_SHIFT);
500 +
501 + bcm_spi_writew(val, bs->regs, SPI_CMD);
502 +}
503 +
504 +static int bcm63xx_spi_setup_transfer(struct spi_device *spi,
505 + struct spi_transfer *t)
506 +{
507 + u8 bits_per_word;
508 + u8 clk_cfg;
509 + u32 hz;
510 + unsigned int div;
511 +
512 + struct bcm63xx_spi *bs = spi_master_get_devdata(spi->master);
513 +
514 + bits_per_word = (t) ? t->bits_per_word : spi->bits_per_word;
515 + hz = (t) ? t->speed_hz : spi->max_speed_hz;
516 + if (bits_per_word != 8) {
517 + dev_err(&spi->dev, "%s, unsupported bits_per_word=%d\n",
518 + __func__, bits_per_word);
519 + return -EINVAL;
520 + }
521 +
522 + if (spi->chip_select > spi->master->num_chipselect) {
523 + dev_err(&spi->dev, "%s, unsupported slave %d\n",
524 + __func__, spi->chip_select);
525 + return -EINVAL;
526 + }
527 +
528 + /* Check clock setting */
529 + div = (bs->speed_hz / hz);
530 + switch (div) {
531 + case 2:
532 + clk_cfg = SPI_CLK_25MHZ;
533 + break;
534 + case 4:
535 + clk_cfg = SPI_CLK_12_50MHZ;
536 + break;
537 + case 8:
538 + clk_cfg = SPI_CLK_6_250MHZ;
539 + break;
540 + case 16:
541 + clk_cfg = SPI_CLK_3_125MHZ;
542 + break;
543 + case 32:
544 + clk_cfg = SPI_CLK_1_563MHZ;
545 + break;
546 + case 128:
547 + clk_cfg = SPI_CLK_0_781MHZ;
548 + break;
549 + case 64:
550 + default:
551 + /* Set to slowest mode for compatibility */
552 + clk_cfg = SPI_CLK_0_781MHZ;
553 + break;
554 + }
555 +
556 + bcm_spi_writeb(clk_cfg, bs->regs, SPI_CLK_CFG);
557 + dev_dbg(&spi->dev, "Setting clock register to %d (hz %d, cmd %02x)\n",
558 + div, hz, clk_cfg);
559 +
560 + return 0;
561 +}
562 +
563 +/* the spi->mode bits understood by this driver: */
564 +#define MODEBITS (SPI_CPOL | SPI_CPHA)
565 +
566 +static int bcm63xx_spi_setup(struct spi_device *spi)
567 +{
568 + struct spi_bitbang *bitbang;
569 + struct bcm63xx_spi *bs;
570 + int retval;
571 +
572 + bs = spi_master_get_devdata(spi->master);
573 + bitbang = &bs->bitbang;
574 +
575 + if (!spi->bits_per_word)
576 + spi->bits_per_word = 8;
577 +
578 + if (spi->mode & ~MODEBITS) {
579 + dev_err(&spi->dev, "%s, unsupported mode bits %x\n",
580 + __func__, spi->mode & ~MODEBITS);
581 + return -EINVAL;
582 + }
583 +
584 + retval = bcm63xx_spi_setup_transfer(spi, NULL);
585 + if (retval < 0) {
586 + dev_err(&spi->dev, "setup: unsupported mode bits %x\n",
587 + spi->mode & ~MODEBITS);
588 + return retval;
589 + }
590 +
591 + dev_dbg(&spi->dev, "%s, mode %d, %u bits/w, %u nsec/bit\n",
592 + __func__, spi->mode & MODEBITS, spi->bits_per_word, 0);
593 +
594 + return 0;
595 +}
596 +
597 +/* Fill the TX FIFO with as many bytes as possible */
598 +static void bcm63xx_spi_fill_tx_fifo(struct bcm63xx_spi *bs)
599 +{
600 + u8 tail;
601 +
602 + /* Fill the Tx FIFO with as many bytes as possible */
603 + tail = bcm_spi_readb(bs->regs, SPI_MSG_TAIL);
604 + while ((tail < bs->fifo_size) && (bs->remaining_bytes > 0)) {
605 + if (bs->tx_ptr)
606 + bcm_spi_writeb(*bs->tx_ptr++, bs->regs, SPI_MSG_DATA);
607 + else
608 + bcm_spi_writeb(0, bs->regs, SPI_MSG_DATA);
609 + bs->remaining_bytes--;
610 + tail = bcm_spi_readb(bs->regs, SPI_MSG_TAIL);
611 + }
612 +}
613 +
614 +static int bcm63xx_txrx_bufs(struct spi_device *spi, struct spi_transfer *t)
615 +{
616 + struct bcm63xx_spi *bs = spi_master_get_devdata(spi->master);
617 + u8 msg_ctl;
618 + u16 cmd;
619 +
620 + dev_dbg(&spi->dev, "txrx: tx %p, rx %p, len %d\n",
621 + t->tx_buf, t->rx_buf, t->len);
622 +
623 + /* Transmitter is inhibited */
624 + bs->tx_ptr = t->tx_buf;
625 + bs->rx_ptr = t->rx_buf;
626 + bs->remaining_bytes = t->len;
627 + init_completion(&bs->done);
628 +
629 + bcm63xx_spi_fill_tx_fifo(bs);
630 +
631 + /* Enable the command done interrupt which
632 + * we use to determine completion of a command */
633 + bcm_spi_writeb(SPI_INTR_CMD_DONE, bs->regs, SPI_INT_MASK);
634 +
635 + /* Fill in the Message control register */
636 + msg_ctl = bcm_spi_readb(bs->regs, SPI_MSG_CTL);
637 + msg_ctl |= (t->len << SPI_BYTE_CNT_SHIFT);
638 + msg_ctl |= (SPI_FD_RW << SPI_MSG_TYPE_SHIFT);
639 + bcm_spi_writeb(msg_ctl, bs->regs, SPI_MSG_CTL);
640 +
641 + /* Issue the transfer */
642 + cmd = bcm_spi_readw(bs->regs, SPI_CMD);
643 + cmd |= SPI_CMD_START_IMMEDIATE;
644 + cmd |= (0 << SPI_CMD_PREPEND_BYTE_CNT_SHIFT);
645 + bcm_spi_writew(cmd, bs->regs, SPI_CMD);
646 +
647 + wait_for_completion(&bs->done);
648 +
649 + /* Disable the CMD_DONE interrupt */
650 + bcm_spi_writeb(~(SPI_INTR_CMD_DONE), bs->regs, SPI_INT_MASK);
651 +
652 + return t->len - bs->remaining_bytes;
653 +}
654 +
655 +/* This driver supports single master mode only. Hence
656 + * CMD_DONE is the only interrupt we care about
657 + */
658 +static irqreturn_t bcm63xx_spi_interrupt(int irq, void *dev_id)
659 +{
660 + struct spi_master *master = (struct spi_master *)dev_id;
661 + struct bcm63xx_spi *bs = spi_master_get_devdata(master);
662 + u8 intr;
663 + u16 cmd;
664 +
665 + /* Read interupts and clear them immediately */
666 + intr = bcm_spi_readb(bs->regs, SPI_INT_STATUS);
667 + bcm_spi_writeb(SPI_INTR_CLEAR_ALL, bs->regs, SPI_INT_MASK);
668 +
669 + /* A tansfer completed */
670 + if (intr & SPI_INTR_CMD_DONE) {
671 + u8 rx_empty;
672 +
673 + rx_empty = bcm_spi_readb(bs->regs, SPI_ST);
674 + /* Read out all the data */
675 + while ((rx_empty & SPI_RX_EMPTY) == 0) {
676 + u8 data;
677 +
678 + data = bcm_spi_readb(bs->regs, SPI_RX_DATA);
679 + if (bs->rx_ptr)
680 + *bs->rx_ptr++ = data;
681 +
682 + rx_empty = bcm_spi_readb(bs->regs, SPI_RX_EMPTY);
683 + }
684 +
685 + /* See if there is more data to send */
686 + if (bs->remaining_bytes > 0) {
687 + bcm63xx_spi_fill_tx_fifo(bs);
688 +
689 + /* Start the transfer */
690 + cmd = bcm_spi_readw(bs->regs, SPI_CMD);
691 + cmd |= SPI_CMD_START_IMMEDIATE;
692 + cmd |= (0 << SPI_CMD_PREPEND_BYTE_CNT_SHIFT);
693 + bcm_spi_writew(cmd, bs->regs, SPI_CMD);
694 + } else
695 + complete(&bs->done);
696 + }
697 +
698 + return IRQ_HANDLED;
699 +}
700 +
701 +
702 +static int __init bcm63xx_spi_probe(struct platform_device *pdev)
703 +{
704 + struct resource *r;
705 + struct bcm63xx_spi_pdata *pdata = pdev->dev.platform_data;
706 + int irq;
707 + struct spi_master *master;
708 + struct clk *clk;
709 + struct bcm63xx_spi *bs;
710 + int ret;
711 +
712 + r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
713 + if (!r) {
714 + ret = -ENXIO;
715 + goto out;
716 + }
717 +
718 + irq = platform_get_irq(pdev, 0);
719 + if (irq < 0) {
720 + ret = -ENXIO;
721 + goto out;
722 + }
723 +
724 + bcm63xx_spi_regs_init();
725 +
726 + clk = clk_get(&pdev->dev, "spi");
727 + if (IS_ERR(clk)) {
728 + dev_err(&pdev->dev, "No clock for device\n");
729 + ret = -ENODEV;
730 + goto out;
731 + }
732 +
733 + master = spi_alloc_master(&pdev->dev, sizeof(struct bcm63xx_spi));
734 + if (!master) {
735 + ret = -ENOMEM;
736 + goto out_free;
737 + }
738 +
739 + bs = spi_master_get_devdata(master);
740 + bs->bitbang.master = spi_master_get(master);
741 + bs->bitbang.chipselect = bcm63xx_spi_chipselect;
742 + bs->bitbang.setup_transfer = bcm63xx_spi_setup_transfer;
743 + bs->bitbang.txrx_bufs = bcm63xx_txrx_bufs;
744 + bs->bitbang.master->setup = bcm63xx_spi_setup;
745 + init_completion(&bs->done);
746 +
747 + platform_set_drvdata(pdev, master);
748 + bs->pdev = pdev;
749 +
750 + if (!request_mem_region(r->start,
751 + r->end - r->start, PFX)) {
752 + ret = -ENXIO;
753 + goto out_free;
754 + }
755 +
756 + bs->regs = ioremap_nocache(r->start, r->end - r->start);
757 + if (!bs->regs) {
758 + printk(KERN_ERR PFX " unable to ioremap regs\n");
759 + ret = -ENOMEM;
760 + goto out_free;
761 + }
762 + bs->irq = irq;
763 + bs->clk = clk;
764 + bs->fifo_size = pdata->fifo_size;
765 +
766 + ret = request_irq(irq, bcm63xx_spi_interrupt, 0,
767 + pdev->name, master);
768 + if (ret) {
769 + printk(KERN_ERR PFX " unable to request irq\n");
770 + goto out_unmap;
771 + }
772 +
773 + master->bus_num = pdata->bus_num;
774 + master->num_chipselect = pdata->num_chipselect;
775 + bs->speed_hz = pdata->speed_hz;
776 +
777 + /* Initialize hardware */
778 + clk_enable(bs->clk);
779 + bcm_spi_writeb(SPI_INTR_CLEAR_ALL, bs->regs, SPI_INT_MASK);
780 +
781 + dev_info(&pdev->dev, " at 0x%08x (irq %d, FIFOs size %d) v%s\n",
782 + r->start, irq, bs->fifo_size, DRV_VER);
783 +
784 + ret = spi_bitbang_start(&bs->bitbang);
785 + if (ret) {
786 + dev_err(&pdev->dev, "spi_bitbang_start FAILED\n");
787 + goto out_reset_hw;
788 + }
789 +
790 + return ret;
791 +
792 +out_reset_hw:
793 + clk_disable(clk);
794 + free_irq(irq, master);
795 +out_unmap:
796 + iounmap(bs->regs);
797 +out_free:
798 + clk_put(clk);
799 + spi_master_put(master);
800 +out:
801 + return ret;
802 +}
803 +
804 +static int __exit bcm63xx_spi_remove(struct platform_device *pdev)
805 +{
806 + struct spi_master *master = platform_get_drvdata(pdev);
807 + struct bcm63xx_spi *bs = spi_master_get_devdata(master);
808 +
809 + spi_bitbang_stop(&bs->bitbang);
810 + clk_disable(bs->clk);
811 + clk_put(bs->clk);
812 + free_irq(bs->irq, master);
813 + iounmap(bs->regs);
814 + platform_set_drvdata(pdev, 0);
815 + spi_master_put(bs->bitbang.master);
816 +
817 + return 0;
818 +}
819 +
820 +#ifdef CONFIG_PM
821 +static int bcm63xx_spi_suspend(struct platform_device *pdev, pm_message_t mesg)
822 +{
823 + struct spi_master *master = platform_get_drvdata(pdev);
824 + struct bcm63xx_spi *bs = spi_master_get_devdata(master);
825 +
826 + clk_disable(bs->clk);
827 +
828 + return 0;
829 +}
830 +
831 +static int bcm63xx_spi_resume(struct platform_device *pdev)
832 +{
833 + struct bcm63xx_spi *bs = spi_master_get_devdata(master);
834 + struct bcm63xx_spi *bs = spi_master_get_devdata(master);
835 +
836 + clk_enable(bs->clk);
837 +
838 + return 0;
839 +}
840 +#else
841 +#define bcm63xx_spi_suspend NULL
842 +#define bcm63xx_spi_resume NULL
843 +#endif
844 +
845 +static struct platform_driver bcm63xx_spi_driver = {
846 + .driver = {
847 + .name = "bcm63xx-spi",
848 + .owner = THIS_MODULE,
849 + },
850 + .probe = bcm63xx_spi_probe,
851 + .remove = bcm63xx_spi_remove,
852 + .suspend = bcm63xx_spi_suspend,
853 + .resume = bcm63xx_spi_resume,
854 +};
855 +
856 +
857 +static int __init bcm63xx_spi_init(void)
858 +{
859 + return platform_driver_register(&bcm63xx_spi_driver);
860 +}
861 +
862 +static void __exit bcm63xx_spi_exit(void)
863 +{
864 + platform_driver_unregister(&bcm63xx_spi_driver);
865 +}
866 +
867 +module_init(bcm63xx_spi_init);
868 +module_exit(bcm63xx_spi_exit);
869 +
870 +MODULE_ALIAS("platform:bcm63xx_spi");
871 +MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
872 +MODULE_DESCRIPTION("Broadcom BCM63xx SPI Controller driver");
873 +MODULE_LICENSE("GPL");
874 +MODULE_VERSION(DRV_VER);
875 --- a/drivers/spi/Kconfig
876 +++ b/drivers/spi/Kconfig
877 @@ -60,6 +60,13 @@ config SPI_ATMEL
878 This selects a driver for the Atmel SPI Controller, present on
879 many AT32 (AVR32) and AT91 (ARM) chips.
880
881 +config SPI_BCM63XX
882 + tristate "Broadcom BCM63xx SPI controller"
883 + depends on BCM63XX
884 + select SPI_BITBANG
885 + help
886 + This is the SPI controller master driver for Broadcom BCM63xx SoC.
887 +
888 config SPI_BFIN
889 tristate "SPI controller driver for ADI Blackfin5xx"
890 depends on BLACKFIN
891 --- a/drivers/spi/Makefile
892 +++ b/drivers/spi/Makefile
893 @@ -43,6 +43,7 @@ obj-$(CONFIG_SPI_SH_SCI) += spi_sh_sci.
894 obj-$(CONFIG_SPI_SH_MSIOF) += spi_sh_msiof.o
895 obj-$(CONFIG_SPI_STMP3XXX) += spi_stmp.o
896 obj-$(CONFIG_SPI_NUC900) += spi_nuc900.o
897 +obj-$(CONFIG_SPI_BCM63XX) += bcm63xx_spi.o
898
899 # special build for s3c24xx spi driver with fiq support
900 spi_s3c24xx_hw-y := spi_s3c24xx.o
901 --- /dev/null
902 +++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_spi.h
903 @@ -0,0 +1,15 @@
904 +#ifndef BCM63XX_DEV_SPI_H
905 +#define BCM63XX_DEV_SPI_H
906 +
907 +#include <linux/types.h>
908 +
909 +int __init bcm63xx_spi_register(void);
910 +
911 +struct bcm63xx_spi_pdata {
912 + unsigned int fifo_size;
913 + int bus_num;
914 + int num_chipselect;
915 + u32 speed_hz;
916 +};
917 +
918 +#endif /* BCM63XX_DEV_SPI_H */
919 --- a/arch/mips/bcm63xx/Makefile
920 +++ b/arch/mips/bcm63xx/Makefile
921 @@ -1,6 +1,6 @@
922 obj-y += clk.o cpu.o cs.o gpio.o irq.o prom.o setup.o timer.o \
923 dev-dsp.o dev-enet.o dev-pcmcia.o dev-uart.o dev-wdt.o \
924 - dev-usb-ohci.o dev-usb-ehci.o dev-usb-udc.o
925 + dev-usb-ohci.o dev-usb-ehci.o dev-usb-udc.o dev-spi.o
926 obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
927
928 obj-y += boards/
929 --- a/arch/mips/bcm63xx/boards/board_bcm963xx.c
930 +++ b/arch/mips/bcm63xx/boards/board_bcm963xx.c
931 @@ -29,6 +29,7 @@
932 #include <bcm63xx_dev_usb_ohci.h>
933 #include <bcm63xx_dev_usb_ehci.h>
934 #include <bcm63xx_dev_usb_udc.h>
935 +#include <bcm63xx_dev_spi.h>
936 #include <board_bcm963xx.h>
937
938 #define PFX "board_bcm963xx: "
939 @@ -998,6 +999,9 @@ int __init board_register_devices(void)
940 if (board.has_udc0)
941 bcm63xx_udc_register();
942
943 + if (!BCMCPU_IS_6345())
944 + bcm63xx_spi_register();
945 +
946 /* Generate MAC address for WLAN and
947 * register our SPROM */
948 #ifdef CONFIG_SSB_PCIHOST
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