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685d96c281457443a53e8e1f1f584988ef8791a2
[openwrt.git] / target / linux / brcm63xx / patches-3.2 / 240-spi.patch
1 --- a/arch/mips/bcm63xx/cpu.c
2 +++ b/arch/mips/bcm63xx/cpu.c
3 @@ -58,6 +58,7 @@ 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 @@ -132,6 +133,7 @@ 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 @@ -175,6 +177,7 @@ 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_UART1] = BCM_6358_UART1_IRQ,
26 [IRQ_DSL] = BCM_6358_DSL_IRQ,
27 --- /dev/null
28 +++ b/arch/mips/bcm63xx/dev-spi.c
29 @@ -0,0 +1,99 @@
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) 2009-2011 Florian Fainelli <florian@openwrt.org>
36 + * Copyright (C) 2010 Tanguy Bouzeloc <tanguy.bouzeloc@efixo.com>
37 + */
38 +
39 +#include <linux/init.h>
40 +#include <linux/kernel.h>
41 +#include <linux/platform_device.h>
42 +#include <linux/export.h>
43 +
44 +#include <bcm63xx_cpu.h>
45 +#include <bcm63xx_dev_spi.h>
46 +#include <bcm63xx_regs.h>
47 +
48 +#ifdef BCMCPU_RUNTIME_DETECT
49 +/*
50 + * register offsets
51 + */
52 +static const unsigned long bcm96338_regs_spi[] = {
53 + __GEN_SPI_REGS_TABLE(6338)
54 +};
55 +
56 +static const unsigned long bcm96348_regs_spi[] = {
57 + __GEN_SPI_REGS_TABLE(6348)
58 +};
59 +
60 +static const unsigned long bcm96358_regs_spi[] = {
61 + __GEN_SPI_REGS_TABLE(6358)
62 +};
63 +
64 +const unsigned long *bcm63xx_regs_spi;
65 +EXPORT_SYMBOL(bcm63xx_regs_spi);
66 +
67 +static __init void bcm63xx_spi_regs_init(void)
68 +{
69 + if (BCMCPU_IS_6338())
70 + bcm63xx_regs_spi = bcm96338_regs_spi;
71 + if (BCMCPU_IS_6348())
72 + bcm63xx_regs_spi = bcm96348_regs_spi;
73 + if (BCMCPU_IS_6358())
74 + bcm63xx_regs_spi = bcm96358_regs_spi;
75 +}
76 +#else
77 +static __init void bcm63xx_spi_regs_init(void) { }
78 +#endif
79 +
80 +static struct resource spi_resources[] = {
81 + {
82 + .start = -1, /* filled at runtime */
83 + .end = -1, /* filled at runtime */
84 + .flags = IORESOURCE_MEM,
85 + },
86 + {
87 + .start = -1, /* filled at runtime */
88 + .flags = IORESOURCE_IRQ,
89 + },
90 +};
91 +
92 +static struct bcm63xx_spi_pdata spi_pdata = {
93 + .bus_num = 0,
94 + .num_chipselect = 8,
95 + .speed_hz = 50000000, /* Fclk */
96 +};
97 +
98 +static struct platform_device bcm63xx_spi_device = {
99 + .name = "bcm63xx-spi",
100 + .id = 0,
101 + .num_resources = ARRAY_SIZE(spi_resources),
102 + .resource = spi_resources,
103 + .dev = {
104 + .platform_data = &spi_pdata,
105 + },
106 +};
107 +
108 +int __init bcm63xx_spi_register(void)
109 +{
110 + spi_resources[0].start = bcm63xx_regset_address(RSET_SPI);
111 + spi_resources[0].end = spi_resources[0].start;
112 + spi_resources[0].end += RSET_SPI_SIZE - 1;
113 + spi_resources[1].start = bcm63xx_get_irq_number(IRQ_SPI);
114 +
115 + if (BCMCPU_IS_6345())
116 + return -ENODEV;
117 +
118 + /* Fill in platform data */
119 + if (BCMCPU_IS_6338() || BCMCPU_IS_6348())
120 + spi_pdata.fifo_size = SPI_BCM_6338_SPI_MSG_DATA_SIZE;
121 +
122 + if (BCMCPU_IS_6358())
123 + spi_pdata.fifo_size = SPI_BCM_6358_SPI_MSG_DATA_SIZE;
124 +
125 + bcm63xx_spi_regs_init();
126 +
127 + return platform_device_register(&bcm63xx_spi_device);
128 +}
129 --- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_cpu.h
130 +++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_cpu.h
131 @@ -109,6 +109,7 @@ enum bcm63xx_regs_set {
132 #define RSET_WDT_SIZE 12
133 #define RSET_ENET_SIZE 2048
134 #define RSET_ENETDMA_SIZE 2048
135 +#define RSET_SPI_SIZE 256
136 #define RSET_UART_SIZE 24
137 #define RSET_UDC_SIZE 256
138 #define RSET_OHCI_SIZE 256
139 @@ -214,7 +215,7 @@ enum bcm63xx_regs_set {
140 #define BCM_6358_UART0_BASE (0xfffe0100)
141 #define BCM_6358_UART1_BASE (0xfffe0120)
142 #define BCM_6358_GPIO_BASE (0xfffe0080)
143 -#define BCM_6358_SPI_BASE (0xdeadbeef)
144 +#define BCM_6358_SPI_BASE (0xfffe0800)
145 #define BCM_6358_UDC0_BASE (0xfffe0400)
146 #define BCM_6358_OHCI0_BASE (0xfffe1400)
147 #define BCM_6358_OHCI_PRIV_BASE (0xdeadbeef)
148 @@ -441,6 +442,7 @@ static inline unsigned long bcm63xx_regs
149 */
150 enum bcm63xx_irq {
151 IRQ_TIMER = 0,
152 + IRQ_SPI,
153 IRQ_UART0,
154 IRQ_UART1,
155 IRQ_DSL,
156 @@ -507,6 +509,7 @@ enum bcm63xx_irq {
157 * 6348 irqs
158 */
159 #define BCM_6348_TIMER_IRQ (IRQ_INTERNAL_BASE + 0)
160 +#define BCM_6348_SPI_IRQ (IRQ_INTERNAL_BASE + 1)
161 #define BCM_6348_UART0_IRQ (IRQ_INTERNAL_BASE + 2)
162 #define BCM_6348_DSL_IRQ (IRQ_INTERNAL_BASE + 4)
163 #define BCM_6348_UDC0_IRQ (IRQ_INTERNAL_BASE + 6)
164 @@ -531,6 +534,7 @@ enum bcm63xx_irq {
165 * 6358 irqs
166 */
167 #define BCM_6358_TIMER_IRQ (IRQ_INTERNAL_BASE + 0)
168 +#define BCM_6358_SPI_IRQ (IRQ_INTERNAL_BASE + 1)
169 #define BCM_6358_UART0_IRQ (IRQ_INTERNAL_BASE + 2)
170 #define BCM_6358_UART1_IRQ (IRQ_INTERNAL_BASE + 3)
171 #define BCM_6358_OHCI0_IRQ (IRQ_INTERNAL_BASE + 5)
172 --- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
173 +++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
174 @@ -804,4 +804,116 @@
175 #define DMIPSPLLCFG_N2_SHIFT 29
176 #define DMIPSPLLCFG_N2_MASK (0x7 << DMIPSPLLCFG_N2_SHIFT)
177
178 +/*************************************************************************
179 + * _REG relative to RSET_SPI
180 + *************************************************************************/
181 +
182 +/* BCM 6338 SPI core */
183 +#define SPI_BCM_6338_SPI_CMD 0x00 /* 16-bits register */
184 +#define SPI_BCM_6338_SPI_INT_STATUS 0x02
185 +#define SPI_BCM_6338_SPI_INT_MASK_ST 0x03
186 +#define SPI_BCM_6338_SPI_INT_MASK 0x04
187 +#define SPI_BCM_6338_SPI_ST 0x05
188 +#define SPI_BCM_6338_SPI_CLK_CFG 0x06
189 +#define SPI_BCM_6338_SPI_FILL_BYTE 0x07
190 +#define SPI_BCM_6338_SPI_MSG_TAIL 0x09
191 +#define SPI_BCM_6338_SPI_RX_TAIL 0x0b
192 +#define SPI_BCM_6338_SPI_MSG_CTL 0x40
193 +#define SPI_BCM_6338_SPI_MSG_DATA 0x41
194 +#define SPI_BCM_6338_SPI_MSG_DATA_SIZE 0x3f
195 +#define SPI_BCM_6338_SPI_RX_DATA 0x80
196 +#define SPI_BCM_6338_SPI_RX_DATA_SIZE 0x3f
197 +
198 +/* BCM 6348 SPI core */
199 +#define SPI_BCM_6348_SPI_CMD 0x00 /* 16-bits register */
200 +#define SPI_BCM_6348_SPI_INT_STATUS 0x02
201 +#define SPI_BCM_6348_SPI_INT_MASK_ST 0x03
202 +#define SPI_BCM_6348_SPI_INT_MASK 0x04
203 +#define SPI_BCM_6348_SPI_ST 0x05
204 +#define SPI_BCM_6348_SPI_CLK_CFG 0x06
205 +#define SPI_BCM_6348_SPI_FILL_BYTE 0x07
206 +#define SPI_BCM_6348_SPI_MSG_TAIL 0x09
207 +#define SPI_BCM_6348_SPI_RX_TAIL 0x0b
208 +#define SPI_BCM_6348_SPI_MSG_CTL 0x40
209 +#define SPI_BCM_6348_SPI_MSG_DATA 0x41
210 +#define SPI_BCM_6348_SPI_MSG_DATA_SIZE 0x3f
211 +#define SPI_BCM_6348_SPI_RX_DATA 0x80
212 +#define SPI_BCM_6348_SPI_RX_DATA_SIZE 0x3f
213 +
214 +/* BCM 6358 SPI core */
215 +#define SPI_BCM_6358_SPI_MSG_CTL 0x00 /* 16-bits register */
216 +
217 +#define SPI_BCM_6358_SPI_MSG_DATA 0x02
218 +#define SPI_BCM_6358_SPI_MSG_DATA_SIZE 0x21e
219 +
220 +#define SPI_BCM_6358_SPI_RX_DATA 0x400
221 +#define SPI_BCM_6358_SPI_RX_DATA_SIZE 0x220
222 +
223 +#define SPI_BCM_6358_SPI_CMD 0x700 /* 16-bits register */
224 +
225 +#define SPI_BCM_6358_SPI_INT_STATUS 0x702
226 +#define SPI_BCM_6358_SPI_INT_MASK_ST 0x703
227 +
228 +#define SPI_BCM_6358_SPI_INT_MASK 0x704
229 +
230 +#define SPI_BCM_6358_SPI_ST 0x705
231 +
232 +#define SPI_BCM_6358_SPI_CLK_CFG 0x706
233 +
234 +#define SPI_BCM_6358_SPI_FILL_BYTE 0x707
235 +#define SPI_BCM_6358_SPI_MSG_TAIL 0x709
236 +#define SPI_BCM_6358_SPI_RX_TAIL 0x70B
237 +
238 +/* Shared SPI definitions */
239 +
240 +/* Message configuration */
241 +#define SPI_FD_RW 0x00
242 +#define SPI_HD_W 0x01
243 +#define SPI_HD_R 0x02
244 +#define SPI_BYTE_CNT_SHIFT 0
245 +#define SPI_MSG_TYPE_SHIFT 14
246 +
247 +/* Command */
248 +#define SPI_CMD_NOOP 0x00
249 +#define SPI_CMD_SOFT_RESET 0x01
250 +#define SPI_CMD_HARD_RESET 0x02
251 +#define SPI_CMD_START_IMMEDIATE 0x03
252 +#define SPI_CMD_COMMAND_SHIFT 0
253 +#define SPI_CMD_COMMAND_MASK 0x000f
254 +#define SPI_CMD_DEVICE_ID_SHIFT 4
255 +#define SPI_CMD_PREPEND_BYTE_CNT_SHIFT 8
256 +#define SPI_CMD_ONE_BYTE_SHIFT 11
257 +#define SPI_CMD_ONE_WIRE_SHIFT 12
258 +#define SPI_DEV_ID_0 0
259 +#define SPI_DEV_ID_1 1
260 +#define SPI_DEV_ID_2 2
261 +#define SPI_DEV_ID_3 3
262 +
263 +/* Interrupt mask */
264 +#define SPI_INTR_CMD_DONE 0x01
265 +#define SPI_INTR_RX_OVERFLOW 0x02
266 +#define SPI_INTR_TX_UNDERFLOW 0x04
267 +#define SPI_INTR_TX_OVERFLOW 0x08
268 +#define SPI_INTR_RX_UNDERFLOW 0x10
269 +#define SPI_INTR_CLEAR_ALL 0x1f
270 +
271 +/* Status */
272 +#define SPI_RX_EMPTY 0x02
273 +#define SPI_CMD_BUSY 0x04
274 +#define SPI_SERIAL_BUSY 0x08
275 +
276 +/* Clock configuration */
277 +#define SPI_CLK_20MHZ 0x00
278 +#define SPI_CLK_0_391MHZ 0x01
279 +#define SPI_CLK_0_781MHZ 0x02 /* default */
280 +#define SPI_CLK_1_563MHZ 0x03
281 +#define SPI_CLK_3_125MHZ 0x04
282 +#define SPI_CLK_6_250MHZ 0x05
283 +#define SPI_CLK_12_50MHZ 0x06
284 +#define SPI_CLK_25MHZ 0x07
285 +#define SPI_CLK_MASK 0x07
286 +#define SPI_SSOFFTIME_MASK 0x38
287 +#define SPI_SSOFFTIME_SHIFT 3
288 +#define SPI_BYTE_SWAP 0x80
289 +
290 #endif /* BCM63XX_REGS_H_ */
291 --- /dev/null
292 +++ b/drivers/spi/bcm63xx_spi.c
293 @@ -0,0 +1,496 @@
294 +/*
295 + * Broadcom BCM63xx SPI controller support
296 + *
297 + * Copyright (C) 2009 Florian Fainelli <florian@openwrt.org>
298 + * Copyright (C) 2010 Tanguy Bouzeloc <tanguy.bouzeloc@efixo.com>
299 + *
300 + * This program is free software; you can redistribute it and/or
301 + * modify it under the terms of the GNU General Public License
302 + * as published by the Free Software Foundation; either version 2
303 + * of the License, or (at your option) any later version.
304 + *
305 + * This program is distributed in the hope that it will be useful,
306 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
307 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
308 + * GNU General Public License for more details.
309 + *
310 + * You should have received a copy of the GNU General Public License
311 + * along with this program; if not, write to the
312 + * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
313 + */
314 +
315 +#include <linux/kernel.h>
316 +#include <linux/init.h>
317 +#include <linux/clk.h>
318 +#include <linux/module.h>
319 +#include <linux/platform_device.h>
320 +#include <linux/delay.h>
321 +#include <linux/interrupt.h>
322 +#include <linux/spi/spi.h>
323 +#include <linux/completion.h>
324 +#include <linux/err.h>
325 +
326 +#include <bcm63xx_dev_spi.h>
327 +
328 +#define PFX KBUILD_MODNAME
329 +#define DRV_VER "0.1.2"
330 +
331 +struct bcm63xx_spi {
332 + spinlock_t lock;
333 + int stopping;
334 + struct completion done;
335 +
336 + void __iomem *regs;
337 + int irq;
338 +
339 + /* Platform data */
340 + u32 speed_hz;
341 + unsigned fifo_size;
342 +
343 + /* Data buffers */
344 + const unsigned char *tx_ptr;
345 + unsigned char *rx_ptr;
346 +
347 + /* data iomem */
348 + u8 __iomem *tx_io;
349 + const u8 __iomem *rx_io;
350 +
351 + int remaining_bytes;
352 +
353 + struct clk *clk;
354 + struct platform_device *pdev;
355 +};
356 +
357 +static inline u8 bcm_spi_readb(struct bcm63xx_spi *bs,
358 + unsigned int offset)
359 +{
360 + return bcm_readw(bs->regs + bcm63xx_spireg(offset));
361 +}
362 +
363 +static inline u16 bcm_spi_readw(struct bcm63xx_spi *bs,
364 + unsigned int offset)
365 +{
366 + return bcm_readw(bs->regs + bcm63xx_spireg(offset));
367 +}
368 +
369 +static inline void bcm_spi_writeb(struct bcm63xx_spi *bs,
370 + u8 value, unsigned int offset)
371 +{
372 + bcm_writeb(value, bs->regs + bcm63xx_spireg(offset));
373 +}
374 +
375 +static inline void bcm_spi_writew(struct bcm63xx_spi *bs,
376 + u16 value, unsigned int offset)
377 +{
378 + bcm_writew(value, bs->regs + bcm63xx_spireg(offset));
379 +}
380 +
381 +static int bcm63xx_spi_setup_transfer(struct spi_device *spi,
382 + struct spi_transfer *t)
383 +{
384 + u8 bits_per_word;
385 + u8 clk_cfg;
386 + u32 hz;
387 + unsigned int div;
388 +
389 + struct bcm63xx_spi *bs = spi_master_get_devdata(spi->master);
390 +
391 + bits_per_word = (t) ? t->bits_per_word : spi->bits_per_word;
392 + hz = (t) ? t->speed_hz : spi->max_speed_hz;
393 + if (bits_per_word != 8) {
394 + dev_err(&spi->dev, "%s, unsupported bits_per_word=%d\n",
395 + __func__, bits_per_word);
396 + return -EINVAL;
397 + }
398 +
399 + if (spi->chip_select > spi->master->num_chipselect) {
400 + dev_err(&spi->dev, "%s, unsupported slave %d\n",
401 + __func__, spi->chip_select);
402 + return -EINVAL;
403 + }
404 +
405 + /* Check clock setting */
406 + div = (bs->speed_hz / hz);
407 + switch (div) {
408 + case 2:
409 + clk_cfg = SPI_CLK_25MHZ;
410 + break;
411 + case 4:
412 + clk_cfg = SPI_CLK_12_50MHZ;
413 + break;
414 + case 8:
415 + clk_cfg = SPI_CLK_6_250MHZ;
416 + break;
417 + case 16:
418 + clk_cfg = SPI_CLK_3_125MHZ;
419 + break;
420 + case 32:
421 + clk_cfg = SPI_CLK_1_563MHZ;
422 + break;
423 + case 64:
424 + clk_cfg = SPI_CLK_0_781MHZ;
425 + break;
426 + case 128:
427 + default:
428 + /* Set to slowest mode for compatibility */
429 + clk_cfg = SPI_CLK_0_391MHZ;
430 + break;
431 + }
432 +
433 + bcm_spi_writeb(bs, clk_cfg, SPI_CLK_CFG);
434 + dev_dbg(&spi->dev, "Setting clock register to %d (hz %d, cmd %02x)\n",
435 + div, hz, clk_cfg);
436 +
437 + return 0;
438 +}
439 +
440 +/* the spi->mode bits understood by this driver: */
441 +#define MODEBITS (SPI_CPOL | SPI_CPHA)
442 +
443 +static int bcm63xx_spi_setup(struct spi_device *spi)
444 +{
445 + struct bcm63xx_spi *bs;
446 + int ret;
447 +
448 + bs = spi_master_get_devdata(spi->master);
449 +
450 + if (bs->stopping)
451 + return -ESHUTDOWN;
452 +
453 + if (!spi->bits_per_word)
454 + spi->bits_per_word = 8;
455 +
456 + if (spi->mode & ~MODEBITS) {
457 + dev_err(&spi->dev, "%s, unsupported mode bits %x\n",
458 + __func__, spi->mode & ~MODEBITS);
459 + return -EINVAL;
460 + }
461 +
462 + ret = bcm63xx_spi_setup_transfer(spi, NULL);
463 + if (ret < 0) {
464 + dev_err(&spi->dev, "setup: unsupported mode bits %x\n",
465 + spi->mode & ~MODEBITS);
466 + return ret;
467 + }
468 +
469 + dev_dbg(&spi->dev, "%s, mode %d, %u bits/w, %u nsec/bit\n",
470 + __func__, spi->mode & MODEBITS, spi->bits_per_word, 0);
471 +
472 + return 0;
473 +}
474 +
475 +/* Fill the TX FIFO with as many bytes as possible */
476 +static void bcm63xx_spi_fill_tx_fifo(struct bcm63xx_spi *bs)
477 +{
478 + u8 size;
479 +
480 + /* Fill the Tx FIFO with as many bytes as possible */
481 + size = bs->remaining_bytes < bs->fifo_size ? bs->remaining_bytes :
482 + bs->fifo_size;
483 + memcpy_toio(bs->tx_io, bs->tx_ptr, size);
484 + bs->remaining_bytes -= size;
485 +}
486 +
487 +static int bcm63xx_txrx_bufs(struct spi_device *spi, struct spi_transfer *t)
488 +{
489 + struct bcm63xx_spi *bs = spi_master_get_devdata(spi->master);
490 + u16 msg_ctl;
491 + u16 cmd;
492 +
493 + dev_dbg(&spi->dev, "txrx: tx %p, rx %p, len %d\n",
494 + t->tx_buf, t->rx_buf, t->len);
495 +
496 + /* Transmitter is inhibited */
497 + bs->tx_ptr = t->tx_buf;
498 + bs->rx_ptr = t->rx_buf;
499 + init_completion(&bs->done);
500 +
501 + if (t->tx_buf) {
502 + bs->remaining_bytes = t->len;
503 + bcm63xx_spi_fill_tx_fifo(bs);
504 + }
505 +
506 + /* Enable the command done interrupt which
507 + * we use to determine completion of a command */
508 + bcm_spi_writeb(bs, SPI_INTR_CMD_DONE, SPI_INT_MASK);
509 +
510 + /* Fill in the Message control register */
511 + msg_ctl = (t->len << SPI_BYTE_CNT_SHIFT);
512 +
513 + if (t->rx_buf && t->tx_buf)
514 + msg_ctl |= (SPI_FD_RW << SPI_MSG_TYPE_SHIFT);
515 + else if (t->rx_buf)
516 + msg_ctl |= (SPI_HD_R << SPI_MSG_TYPE_SHIFT);
517 + else if (t->tx_buf)
518 + msg_ctl |= (SPI_HD_W << SPI_MSG_TYPE_SHIFT);
519 +
520 + bcm_spi_writew(bs, msg_ctl, SPI_MSG_CTL);
521 +
522 + /* Issue the transfer */
523 + cmd = SPI_CMD_START_IMMEDIATE;
524 + cmd |= (0 << SPI_CMD_PREPEND_BYTE_CNT_SHIFT);
525 + cmd |= (spi->chip_select << SPI_CMD_DEVICE_ID_SHIFT);
526 + bcm_spi_writew(bs, cmd, SPI_CMD);
527 + wait_for_completion(&bs->done);
528 +
529 + /* Disable the CMD_DONE interrupt */
530 + bcm_spi_writeb(bs, 0, SPI_INT_MASK);
531 +
532 + return t->len - bs->remaining_bytes;
533 +}
534 +
535 +static int bcm63xx_transfer(struct spi_device *spi, struct spi_message *m)
536 +{
537 + struct bcm63xx_spi *bs = spi_master_get_devdata(spi->master);
538 + struct spi_transfer *t;
539 + int ret = 0;
540 +
541 + if (unlikely(list_empty(&m->transfers)))
542 + return -EINVAL;
543 +
544 + if (bs->stopping)
545 + return -ESHUTDOWN;
546 +
547 + list_for_each_entry(t, &m->transfers, transfer_list) {
548 + ret += bcm63xx_txrx_bufs(spi, t);
549 + }
550 +
551 + m->complete(m->context);
552 +
553 + return ret;
554 +}
555 +
556 +/* This driver supports single master mode only. Hence
557 + * CMD_DONE is the only interrupt we care about
558 + */
559 +static irqreturn_t bcm63xx_spi_interrupt(int irq, void *dev_id)
560 +{
561 + struct spi_master *master = (struct spi_master *)dev_id;
562 + struct bcm63xx_spi *bs = spi_master_get_devdata(master);
563 + u8 intr;
564 + u16 cmd;
565 +
566 + /* Read interupts and clear them immediately */
567 + intr = bcm_spi_readb(bs, SPI_INT_STATUS);
568 + bcm_spi_writeb(bs, SPI_INTR_CLEAR_ALL, SPI_INT_STATUS);
569 + bcm_spi_writeb(bs, 0, SPI_INT_MASK);
570 +
571 + /* A tansfer completed */
572 + if (intr & SPI_INTR_CMD_DONE) {
573 + u8 rx_tail;
574 +
575 + rx_tail = bcm_spi_readb(bs, SPI_RX_TAIL);
576 +
577 + /* Read out all the data */
578 + if (rx_tail)
579 + memcpy_fromio(bs->rx_ptr, bs->rx_io, rx_tail);
580 +
581 + /* See if there is more data to send */
582 + if (bs->remaining_bytes > 0) {
583 + bcm63xx_spi_fill_tx_fifo(bs);
584 +
585 + /* Start the transfer */
586 + bcm_spi_writew(bs, SPI_HD_W << SPI_MSG_TYPE_SHIFT,
587 + SPI_MSG_CTL);
588 + cmd = bcm_spi_readw(bs, SPI_CMD);
589 + cmd |= SPI_CMD_START_IMMEDIATE;
590 + cmd |= (0 << SPI_CMD_PREPEND_BYTE_CNT_SHIFT);
591 + bcm_spi_writeb(bs, SPI_INTR_CMD_DONE, SPI_INT_MASK);
592 + bcm_spi_writew(bs, cmd, SPI_CMD);
593 + } else {
594 + complete(&bs->done);
595 + }
596 + }
597 +
598 + return IRQ_HANDLED;
599 +}
600 +
601 +
602 +static int __init bcm63xx_spi_probe(struct platform_device *pdev)
603 +{
604 + struct resource *r;
605 + struct device *dev = &pdev->dev;
606 + struct bcm63xx_spi_pdata *pdata = pdev->dev.platform_data;
607 + int irq;
608 + struct spi_master *master;
609 + struct clk *clk;
610 + struct bcm63xx_spi *bs;
611 + int ret;
612 +
613 + r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
614 + if (!r) {
615 + dev_err(dev, "no iomem\n");
616 + ret = -ENXIO;
617 + goto out;
618 + }
619 +
620 + irq = platform_get_irq(pdev, 0);
621 + if (irq < 0) {
622 + dev_err(dev, "no irq\n");
623 + ret = -ENXIO;
624 + goto out;
625 + }
626 +
627 + clk = clk_get(dev, "spi");
628 + if (IS_ERR(clk)) {
629 + dev_err(dev, "no clock for device\n");
630 + ret = -ENODEV;
631 + goto out;
632 + }
633 +
634 + master = spi_alloc_master(dev, sizeof(*bs));
635 + if (!master) {
636 + dev_err(dev, "out of memory\n");
637 + ret = -ENOMEM;
638 + goto out_free;
639 + }
640 +
641 + bs = spi_master_get_devdata(master);
642 + init_completion(&bs->done);
643 +
644 + platform_set_drvdata(pdev, master);
645 + bs->pdev = pdev;
646 +
647 + if (!request_mem_region(r->start, r->end - r->start, PFX)) {
648 + dev_err(dev, "iomem request failed\n");
649 + ret = -ENXIO;
650 + goto out_put_master;
651 + }
652 +
653 + bs->regs = ioremap_nocache(r->start, r->end - r->start);
654 + if (!bs->regs) {
655 + dev_err(dev, "unable to ioremap regs\n");
656 + ret = -ENOMEM;
657 + goto out_put_master;
658 + }
659 + bs->irq = irq;
660 + bs->clk = clk;
661 + bs->fifo_size = pdata->fifo_size;
662 +
663 + ret = request_irq(irq, bcm63xx_spi_interrupt, 0, pdev->name, master);
664 + if (ret) {
665 + dev_err(dev, "unable to request irq\n");
666 + goto out_unmap;
667 + }
668 +
669 + master->bus_num = pdata->bus_num;
670 + master->num_chipselect = pdata->num_chipselect;
671 + master->setup = bcm63xx_spi_setup;
672 + master->transfer = bcm63xx_transfer;
673 + bs->speed_hz = pdata->speed_hz;
674 + bs->stopping = 0;
675 + bs->tx_io = (u8*)(bs->regs + bcm63xx_spireg(SPI_MSG_DATA));
676 + bs->rx_io = (const u8*)(bs->regs + bcm63xx_spireg(SPI_RX_DATA));
677 + spin_lock_init(&bs->lock);
678 +
679 + /* Initialize hardware */
680 + clk_enable(bs->clk);
681 + bcm_spi_writeb(bs, SPI_INTR_CLEAR_ALL, SPI_INT_STATUS);
682 +
683 + /* register and we are done */
684 + ret = spi_register_master(master);
685 + if (ret) {
686 + dev_err(dev, "spi register failed\n");
687 + goto out_reset_hw;
688 + }
689 +
690 + dev_info(dev, "at 0x%08x (irq %d, FIFOs size %d) v%s\n",
691 + r->start, irq, bs->fifo_size, DRV_VER);
692 +
693 + return 0;
694 +
695 +out_reset_hw:
696 + clk_disable(clk);
697 + free_irq(irq, master);
698 +out_unmap:
699 + iounmap(bs->regs);
700 +out_put_master:
701 + spi_master_put(master);
702 +out_free:
703 + clk_put(clk);
704 +out:
705 + return ret;
706 +}
707 +
708 +static int __exit bcm63xx_spi_remove(struct platform_device *pdev)
709 +{
710 + struct spi_master *master = platform_get_drvdata(pdev);
711 + struct bcm63xx_spi *bs = spi_master_get_devdata(master);
712 + struct resource *r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
713 +
714 + /* reset spi block */
715 + bcm_spi_writeb(bs, 0, SPI_INT_MASK);
716 + spin_lock(&bs->lock);
717 + bs->stopping = 1;
718 +
719 + /* HW shutdown */
720 + clk_disable(bs->clk);
721 + clk_put(bs->clk);
722 +
723 + spin_unlock(&bs->lock);
724 +
725 + free_irq(bs->irq, master);
726 + iounmap(bs->regs);
727 + release_mem_region(r->start, r->end - r->start);
728 + platform_set_drvdata(pdev, 0);
729 + spi_unregister_master(master);
730 +
731 + return 0;
732 +}
733 +
734 +#ifdef CONFIG_PM
735 +static int bcm63xx_spi_suspend(struct platform_device *pdev, pm_message_t mesg)
736 +{
737 + struct spi_master *master = platform_get_drvdata(pdev);
738 + struct bcm63xx_spi *bs = spi_master_get_devdata(master);
739 +
740 + clk_disable(bs->clk);
741 +
742 + return 0;
743 +}
744 +
745 +static int bcm63xx_spi_resume(struct platform_device *pdev)
746 +{
747 + struct spi_master *master = platform_get_drvdata(pdev);
748 + struct bcm63xx_spi *bs = spi_master_get_devdata(master);
749 +
750 + clk_enable(bs->clk);
751 +
752 + return 0;
753 +}
754 +#else
755 +#define bcm63xx_spi_suspend NULL
756 +#define bcm63xx_spi_resume NULL
757 +#endif
758 +
759 +static struct platform_driver bcm63xx_spi_driver = {
760 + .driver = {
761 + .name = "bcm63xx-spi",
762 + .owner = THIS_MODULE,
763 + },
764 + .probe = bcm63xx_spi_probe,
765 + .remove = __exit_p(bcm63xx_spi_remove),
766 + .suspend = bcm63xx_spi_suspend,
767 + .resume = bcm63xx_spi_resume,
768 +};
769 +
770 +
771 +static int __init bcm63xx_spi_init(void)
772 +{
773 + return platform_driver_register(&bcm63xx_spi_driver);
774 +}
775 +
776 +static void __exit bcm63xx_spi_exit(void)
777 +{
778 + platform_driver_unregister(&bcm63xx_spi_driver);
779 +}
780 +
781 +module_init(bcm63xx_spi_init);
782 +module_exit(bcm63xx_spi_exit);
783 +
784 +MODULE_ALIAS("platform:bcm63xx_spi");
785 +MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
786 +MODULE_AUTHOR("Tanguy Bouzeloc <tanguy.bouzeloc@efixo.com>");
787 +MODULE_DESCRIPTION("Broadcom BCM63xx SPI Controller driver");
788 +MODULE_LICENSE("GPL");
789 +MODULE_VERSION(DRV_VER);
790 --- a/drivers/spi/Kconfig
791 +++ b/drivers/spi/Kconfig
792 @@ -74,6 +74,12 @@ config SPI_ATMEL
793 This selects a driver for the Atmel SPI Controller, present on
794 many AT32 (AVR32) and AT91 (ARM) chips.
795
796 +config SPI_BCM63XX
797 + tristate "Broadcom BCM63xx SPI controller"
798 + depends on BCM63XX
799 + help
800 + This is the SPI controller master driver for Broadcom BCM63xx SoC.
801 +
802 config SPI_BFIN
803 tristate "SPI controller driver for ADI Blackfin5xx"
804 depends on BLACKFIN
805 --- a/drivers/spi/Makefile
806 +++ b/drivers/spi/Makefile
807 @@ -14,6 +14,7 @@ obj-$(CONFIG_SPI_ALTERA) += spi-altera.
808 obj-$(CONFIG_SPI_ATMEL) += spi-atmel.o
809 obj-$(CONFIG_SPI_ATH79) += spi-ath79.o
810 obj-$(CONFIG_SPI_AU1550) += spi-au1550.o
811 +obj-$(CONFIG_SPI_BCM63XX) += bcm63xx_spi.o
812 obj-$(CONFIG_SPI_BFIN) += spi-bfin5xx.o
813 obj-$(CONFIG_SPI_BFIN_SPORT) += spi-bfin-sport.o
814 obj-$(CONFIG_SPI_BITBANG) += spi-bitbang.o
815 --- /dev/null
816 +++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_spi.h
817 @@ -0,0 +1,85 @@
818 +#ifndef BCM63XX_DEV_SPI_H
819 +#define BCM63XX_DEV_SPI_H
820 +
821 +#include <linux/types.h>
822 +#include <bcm63xx_io.h>
823 +#include <bcm63xx_regs.h>
824 +
825 +int __init bcm63xx_spi_register(void);
826 +
827 +struct bcm63xx_spi_pdata {
828 + unsigned int fifo_size;
829 + int bus_num;
830 + int num_chipselect;
831 + u32 speed_hz;
832 +};
833 +
834 +enum bcm63xx_regs_spi {
835 + SPI_CMD,
836 + SPI_INT_STATUS,
837 + SPI_INT_MASK_ST,
838 + SPI_INT_MASK,
839 + SPI_ST,
840 + SPI_CLK_CFG,
841 + SPI_FILL_BYTE,
842 + SPI_MSG_TAIL,
843 + SPI_RX_TAIL,
844 + SPI_MSG_CTL,
845 + SPI_MSG_DATA,
846 + SPI_RX_DATA,
847 +};
848 +
849 +#define __GEN_SPI_RSET_BASE(__cpu, __rset) \
850 + case SPI_## __rset: \
851 + return SPI_BCM_## __cpu ##_SPI_## __rset;
852 +
853 +#define __GEN_SPI_RSET(__cpu) \
854 + switch (reg) { \
855 + __GEN_SPI_RSET_BASE(__cpu, CMD) \
856 + __GEN_SPI_RSET_BASE(__cpu, INT_STATUS) \
857 + __GEN_SPI_RSET_BASE(__cpu, INT_MASK_ST) \
858 + __GEN_SPI_RSET_BASE(__cpu, INT_MASK) \
859 + __GEN_SPI_RSET_BASE(__cpu, ST) \
860 + __GEN_SPI_RSET_BASE(__cpu, CLK_CFG) \
861 + __GEN_SPI_RSET_BASE(__cpu, FILL_BYTE) \
862 + __GEN_SPI_RSET_BASE(__cpu, MSG_TAIL) \
863 + __GEN_SPI_RSET_BASE(__cpu, RX_TAIL) \
864 + __GEN_SPI_RSET_BASE(__cpu, MSG_CTL) \
865 + __GEN_SPI_RSET_BASE(__cpu, MSG_DATA) \
866 + __GEN_SPI_RSET_BASE(__cpu, RX_DATA) \
867 + }
868 +
869 +#define __GEN_SPI_REGS_TABLE(__cpu) \
870 + [SPI_CMD] = SPI_BCM_## __cpu ##_SPI_CMD, \
871 + [SPI_INT_STATUS] = SPI_BCM_## __cpu ##_SPI_INT_STATUS, \
872 + [SPI_INT_MASK_ST] = SPI_BCM_## __cpu ##_SPI_INT_MASK_ST, \
873 + [SPI_INT_MASK] = SPI_BCM_## __cpu ##_SPI_INT_MASK, \
874 + [SPI_ST] = SPI_BCM_## __cpu ##_SPI_ST, \
875 + [SPI_CLK_CFG] = SPI_BCM_## __cpu ##_SPI_CLK_CFG, \
876 + [SPI_FILL_BYTE] = SPI_BCM_## __cpu ##_SPI_FILL_BYTE, \
877 + [SPI_MSG_TAIL] = SPI_BCM_## __cpu ##_SPI_MSG_TAIL, \
878 + [SPI_RX_TAIL] = SPI_BCM_## __cpu ##_SPI_RX_TAIL, \
879 + [SPI_MSG_CTL] = SPI_BCM_## __cpu ##_SPI_MSG_CTL, \
880 + [SPI_MSG_DATA] = SPI_BCM_## __cpu ##_SPI_MSG_DATA, \
881 + [SPI_RX_DATA] = SPI_BCM_## __cpu ##_SPI_RX_DATA,
882 +
883 +static inline unsigned long bcm63xx_spireg(enum bcm63xx_regs_spi reg)
884 +{
885 +#ifdef BCMCPU_RUNTIME_DETECT
886 + extern const unsigned long *bcm63xx_regs_spi;
887 + return bcm63xx_regs_spi[reg];
888 +#else
889 +#ifdef CONFIG_BCM63XX_CPU_6338
890 + __GEN_SPI_RSET(6338)
891 +#endif
892 +#ifdef CONFIG_BCM63XX_CPU_6348
893 + __GEN_SPI_RSET(6348)
894 +#endif
895 +#ifdef CONFIG_BCM63XX_CPU_6358
896 + __GEN_SPI_RSET(6358)
897 +#endif
898 +#endif
899 + return 0;
900 +}
901 +
902 +#endif /* BCM63XX_DEV_SPI_H */
903 --- a/arch/mips/bcm63xx/Makefile
904 +++ b/arch/mips/bcm63xx/Makefile
905 @@ -1,6 +1,6 @@
906 obj-y += clk.o cpu.o cs.o gpio.o irq.o prom.o setup.o timer.o \
907 dev-dsp.o dev-enet.o dev-pcmcia.o dev-uart.o dev-wdt.o \
908 - dev-usb-ohci.o dev-usb-ehci.o dev-usb-udc.o
909 + dev-usb-ohci.o dev-usb-ehci.o dev-usb-udc.o dev-spi.o
910 obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
911
912 obj-y += boards/
913 --- a/arch/mips/bcm63xx/boards/board_bcm963xx.c
914 +++ b/arch/mips/bcm63xx/boards/board_bcm963xx.c
915 @@ -31,6 +31,7 @@
916 #include <bcm63xx_dev_usb_ohci.h>
917 #include <bcm63xx_dev_usb_ehci.h>
918 #include <bcm63xx_dev_usb_udc.h>
919 +#include <bcm63xx_dev_spi.h>
920 #include <board_bcm963xx.h>
921
922 #define PFX "board_bcm963xx: "
923 @@ -934,6 +935,8 @@ int __init board_register_devices(void)
924 if (board.num_spis)
925 spi_register_board_info(board.spis, board.num_spis);
926
927 + bcm63xx_spi_register();
928 +
929 /* read base address of boot chip select (0) */
930 val = bcm_mpi_readl(MPI_CSBASE_REG(0));
931 val &= MPI_CSBASE_BASE_MASK;
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