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0dfd337a6e7777d456f16aa5596ac1852f944947
[openwrt.git] / target / linux / brcm63xx / patches-3.3 / 240-spi.patch
1 --- /dev/null
2 +++ b/arch/mips/bcm63xx/dev-spi.c
3 @@ -0,0 +1,99 @@
4 +/*
5 + * This file is subject to the terms and conditions of the GNU General Public
6 + * License. See the file "COPYING" in the main directory of this archive
7 + * for more details.
8 + *
9 + * Copyright (C) 2009-2011 Florian Fainelli <florian@openwrt.org>
10 + * Copyright (C) 2010 Tanguy Bouzeloc <tanguy.bouzeloc@efixo.com>
11 + */
12 +
13 +#include <linux/init.h>
14 +#include <linux/kernel.h>
15 +#include <linux/platform_device.h>
16 +#include <linux/export.h>
17 +
18 +#include <bcm63xx_cpu.h>
19 +#include <bcm63xx_dev_spi.h>
20 +#include <bcm63xx_regs.h>
21 +
22 +#ifdef BCMCPU_RUNTIME_DETECT
23 +/*
24 + * register offsets
25 + */
26 +static const unsigned long bcm96338_regs_spi[] = {
27 + __GEN_SPI_REGS_TABLE(6338)
28 +};
29 +
30 +static const unsigned long bcm96348_regs_spi[] = {
31 + __GEN_SPI_REGS_TABLE(6348)
32 +};
33 +
34 +static const unsigned long bcm96358_regs_spi[] = {
35 + __GEN_SPI_REGS_TABLE(6358)
36 +};
37 +
38 +const unsigned long *bcm63xx_regs_spi;
39 +EXPORT_SYMBOL(bcm63xx_regs_spi);
40 +
41 +static __init void bcm63xx_spi_regs_init(void)
42 +{
43 + if (BCMCPU_IS_6338())
44 + bcm63xx_regs_spi = bcm96338_regs_spi;
45 + if (BCMCPU_IS_6348())
46 + bcm63xx_regs_spi = bcm96348_regs_spi;
47 + if (BCMCPU_IS_6358())
48 + bcm63xx_regs_spi = bcm96358_regs_spi;
49 +}
50 +#else
51 +static __init void bcm63xx_spi_regs_init(void) { }
52 +#endif
53 +
54 +static struct resource spi_resources[] = {
55 + {
56 + .start = -1, /* filled at runtime */
57 + .end = -1, /* filled at runtime */
58 + .flags = IORESOURCE_MEM,
59 + },
60 + {
61 + .start = -1, /* filled at runtime */
62 + .flags = IORESOURCE_IRQ,
63 + },
64 +};
65 +
66 +static struct bcm63xx_spi_pdata spi_pdata = {
67 + .bus_num = 0,
68 + .num_chipselect = 8,
69 + .speed_hz = 50000000, /* Fclk */
70 +};
71 +
72 +static struct platform_device bcm63xx_spi_device = {
73 + .name = "bcm63xx-spi",
74 + .id = 0,
75 + .num_resources = ARRAY_SIZE(spi_resources),
76 + .resource = spi_resources,
77 + .dev = {
78 + .platform_data = &spi_pdata,
79 + },
80 +};
81 +
82 +int __init bcm63xx_spi_register(void)
83 +{
84 + spi_resources[0].start = bcm63xx_regset_address(RSET_SPI);
85 + spi_resources[0].end = spi_resources[0].start;
86 + spi_resources[0].end += RSET_SPI_SIZE - 1;
87 + spi_resources[1].start = bcm63xx_get_irq_number(IRQ_SPI);
88 +
89 + if (BCMCPU_IS_6345())
90 + return -ENODEV;
91 +
92 + /* Fill in platform data */
93 + if (BCMCPU_IS_6338() || BCMCPU_IS_6348())
94 + spi_pdata.fifo_size = SPI_BCM_6338_SPI_MSG_DATA_SIZE;
95 +
96 + if (BCMCPU_IS_6358())
97 + spi_pdata.fifo_size = SPI_BCM_6358_SPI_MSG_DATA_SIZE;
98 +
99 + bcm63xx_spi_regs_init();
100 +
101 + return platform_device_register(&bcm63xx_spi_device);
102 +}
103 --- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_cpu.h
104 +++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_cpu.h
105 @@ -138,6 +138,7 @@ enum bcm63xx_regs_set {
106 #define RSET_ENET_SIZE 2048
107 #define RSET_ENETDMA_SIZE 2048
108 #define RSET_ENETSW_SIZE 65536
109 +#define RSET_SPI_SIZE 256
110 #define RSET_UART_SIZE 24
111 #define RSET_UDC_SIZE 256
112 #define RSET_OHCI_SIZE 256
113 @@ -289,7 +290,7 @@ enum bcm63xx_regs_set {
114 #define BCM_6358_UART0_BASE (0xfffe0100)
115 #define BCM_6358_UART1_BASE (0xfffe0120)
116 #define BCM_6358_GPIO_BASE (0xfffe0080)
117 -#define BCM_6358_SPI_BASE (0xdeadbeef)
118 +#define BCM_6358_SPI_BASE (0xfffe0800)
119 #define BCM_6358_SPI2_BASE (0xfffe0800)
120 #define BCM_6358_UDC0_BASE (0xfffe0800)
121 #define BCM_6358_OHCI0_BASE (0xfffe1400)
122 @@ -478,6 +479,7 @@ static inline unsigned long bcm63xx_regs
123 */
124 enum bcm63xx_irq {
125 IRQ_TIMER = 0,
126 + IRQ_SPI,
127 IRQ_UART0,
128 IRQ_UART1,
129 IRQ_DSL,
130 @@ -569,6 +571,7 @@ enum bcm63xx_irq {
131 * 6348 irqs
132 */
133 #define BCM_6348_TIMER_IRQ (IRQ_INTERNAL_BASE + 0)
134 +#define BCM_6348_SPI_IRQ (IRQ_INTERNAL_BASE + 1)
135 #define BCM_6348_UART0_IRQ (IRQ_INTERNAL_BASE + 2)
136 #define BCM_6348_UART1_IRQ 0
137 #define BCM_6348_DSL_IRQ (IRQ_INTERNAL_BASE + 4)
138 @@ -599,6 +602,7 @@ enum bcm63xx_irq {
139 * 6358 irqs
140 */
141 #define BCM_6358_TIMER_IRQ (IRQ_INTERNAL_BASE + 0)
142 +#define BCM_6358_SPI_IRQ (IRQ_INTERNAL_BASE + 1)
143 #define BCM_6358_UART0_IRQ (IRQ_INTERNAL_BASE + 2)
144 #define BCM_6358_UART1_IRQ (IRQ_INTERNAL_BASE + 3)
145 #define BCM_6358_DSL_IRQ (IRQ_INTERNAL_BASE + 29)
146 --- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
147 +++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
148 @@ -1007,4 +1007,116 @@
149 #define M2M_SRCID_REG(x) ((x) * 0x40 + 0x14)
150 #define M2M_DSTID_REG(x) ((x) * 0x40 + 0x18)
151
152 +/*************************************************************************
153 + * _REG relative to RSET_SPI
154 + *************************************************************************/
155 +
156 +/* BCM 6338 SPI core */
157 +#define SPI_BCM_6338_SPI_CMD 0x00 /* 16-bits register */
158 +#define SPI_BCM_6338_SPI_INT_STATUS 0x02
159 +#define SPI_BCM_6338_SPI_INT_MASK_ST 0x03
160 +#define SPI_BCM_6338_SPI_INT_MASK 0x04
161 +#define SPI_BCM_6338_SPI_ST 0x05
162 +#define SPI_BCM_6338_SPI_CLK_CFG 0x06
163 +#define SPI_BCM_6338_SPI_FILL_BYTE 0x07
164 +#define SPI_BCM_6338_SPI_MSG_TAIL 0x09
165 +#define SPI_BCM_6338_SPI_RX_TAIL 0x0b
166 +#define SPI_BCM_6338_SPI_MSG_CTL 0x40
167 +#define SPI_BCM_6338_SPI_MSG_DATA 0x41
168 +#define SPI_BCM_6338_SPI_MSG_DATA_SIZE 0x3f
169 +#define SPI_BCM_6338_SPI_RX_DATA 0x80
170 +#define SPI_BCM_6338_SPI_RX_DATA_SIZE 0x3f
171 +
172 +/* BCM 6348 SPI core */
173 +#define SPI_BCM_6348_SPI_CMD 0x00 /* 16-bits register */
174 +#define SPI_BCM_6348_SPI_INT_STATUS 0x02
175 +#define SPI_BCM_6348_SPI_INT_MASK_ST 0x03
176 +#define SPI_BCM_6348_SPI_INT_MASK 0x04
177 +#define SPI_BCM_6348_SPI_ST 0x05
178 +#define SPI_BCM_6348_SPI_CLK_CFG 0x06
179 +#define SPI_BCM_6348_SPI_FILL_BYTE 0x07
180 +#define SPI_BCM_6348_SPI_MSG_TAIL 0x09
181 +#define SPI_BCM_6348_SPI_RX_TAIL 0x0b
182 +#define SPI_BCM_6348_SPI_MSG_CTL 0x40
183 +#define SPI_BCM_6348_SPI_MSG_DATA 0x41
184 +#define SPI_BCM_6348_SPI_MSG_DATA_SIZE 0x3f
185 +#define SPI_BCM_6348_SPI_RX_DATA 0x80
186 +#define SPI_BCM_6348_SPI_RX_DATA_SIZE 0x3f
187 +
188 +/* BCM 6358 SPI core */
189 +#define SPI_BCM_6358_SPI_MSG_CTL 0x00 /* 16-bits register */
190 +
191 +#define SPI_BCM_6358_SPI_MSG_DATA 0x02
192 +#define SPI_BCM_6358_SPI_MSG_DATA_SIZE 0x21e
193 +
194 +#define SPI_BCM_6358_SPI_RX_DATA 0x400
195 +#define SPI_BCM_6358_SPI_RX_DATA_SIZE 0x220
196 +
197 +#define SPI_BCM_6358_SPI_CMD 0x700 /* 16-bits register */
198 +
199 +#define SPI_BCM_6358_SPI_INT_STATUS 0x702
200 +#define SPI_BCM_6358_SPI_INT_MASK_ST 0x703
201 +
202 +#define SPI_BCM_6358_SPI_INT_MASK 0x704
203 +
204 +#define SPI_BCM_6358_SPI_ST 0x705
205 +
206 +#define SPI_BCM_6358_SPI_CLK_CFG 0x706
207 +
208 +#define SPI_BCM_6358_SPI_FILL_BYTE 0x707
209 +#define SPI_BCM_6358_SPI_MSG_TAIL 0x709
210 +#define SPI_BCM_6358_SPI_RX_TAIL 0x70B
211 +
212 +/* Shared SPI definitions */
213 +
214 +/* Message configuration */
215 +#define SPI_FD_RW 0x00
216 +#define SPI_HD_W 0x01
217 +#define SPI_HD_R 0x02
218 +#define SPI_BYTE_CNT_SHIFT 0
219 +#define SPI_MSG_TYPE_SHIFT 14
220 +
221 +/* Command */
222 +#define SPI_CMD_NOOP 0x00
223 +#define SPI_CMD_SOFT_RESET 0x01
224 +#define SPI_CMD_HARD_RESET 0x02
225 +#define SPI_CMD_START_IMMEDIATE 0x03
226 +#define SPI_CMD_COMMAND_SHIFT 0
227 +#define SPI_CMD_COMMAND_MASK 0x000f
228 +#define SPI_CMD_DEVICE_ID_SHIFT 4
229 +#define SPI_CMD_PREPEND_BYTE_CNT_SHIFT 8
230 +#define SPI_CMD_ONE_BYTE_SHIFT 11
231 +#define SPI_CMD_ONE_WIRE_SHIFT 12
232 +#define SPI_DEV_ID_0 0
233 +#define SPI_DEV_ID_1 1
234 +#define SPI_DEV_ID_2 2
235 +#define SPI_DEV_ID_3 3
236 +
237 +/* Interrupt mask */
238 +#define SPI_INTR_CMD_DONE 0x01
239 +#define SPI_INTR_RX_OVERFLOW 0x02
240 +#define SPI_INTR_TX_UNDERFLOW 0x04
241 +#define SPI_INTR_TX_OVERFLOW 0x08
242 +#define SPI_INTR_RX_UNDERFLOW 0x10
243 +#define SPI_INTR_CLEAR_ALL 0x1f
244 +
245 +/* Status */
246 +#define SPI_RX_EMPTY 0x02
247 +#define SPI_CMD_BUSY 0x04
248 +#define SPI_SERIAL_BUSY 0x08
249 +
250 +/* Clock configuration */
251 +#define SPI_CLK_20MHZ 0x00
252 +#define SPI_CLK_0_391MHZ 0x01
253 +#define SPI_CLK_0_781MHZ 0x02 /* default */
254 +#define SPI_CLK_1_563MHZ 0x03
255 +#define SPI_CLK_3_125MHZ 0x04
256 +#define SPI_CLK_6_250MHZ 0x05
257 +#define SPI_CLK_12_50MHZ 0x06
258 +#define SPI_CLK_25MHZ 0x07
259 +#define SPI_CLK_MASK 0x07
260 +#define SPI_SSOFFTIME_MASK 0x38
261 +#define SPI_SSOFFTIME_SHIFT 3
262 +#define SPI_BYTE_SWAP 0x80
263 +
264 #endif /* BCM63XX_REGS_H_ */
265 --- /dev/null
266 +++ b/drivers/spi/bcm63xx_spi.c
267 @@ -0,0 +1,496 @@
268 +/*
269 + * Broadcom BCM63xx SPI controller support
270 + *
271 + * Copyright (C) 2009 Florian Fainelli <florian@openwrt.org>
272 + * Copyright (C) 2010 Tanguy Bouzeloc <tanguy.bouzeloc@efixo.com>
273 + *
274 + * This program is free software; you can redistribute it and/or
275 + * modify it under the terms of the GNU General Public License
276 + * as published by the Free Software Foundation; either version 2
277 + * of the License, or (at your option) any later version.
278 + *
279 + * This program is distributed in the hope that it will be useful,
280 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
281 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
282 + * GNU General Public License for more details.
283 + *
284 + * You should have received a copy of the GNU General Public License
285 + * along with this program; if not, write to the
286 + * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
287 + */
288 +
289 +#include <linux/kernel.h>
290 +#include <linux/init.h>
291 +#include <linux/clk.h>
292 +#include <linux/module.h>
293 +#include <linux/platform_device.h>
294 +#include <linux/delay.h>
295 +#include <linux/interrupt.h>
296 +#include <linux/spi/spi.h>
297 +#include <linux/completion.h>
298 +#include <linux/err.h>
299 +
300 +#include <bcm63xx_dev_spi.h>
301 +
302 +#define PFX KBUILD_MODNAME
303 +#define DRV_VER "0.1.2"
304 +
305 +struct bcm63xx_spi {
306 + spinlock_t lock;
307 + int stopping;
308 + struct completion done;
309 +
310 + void __iomem *regs;
311 + int irq;
312 +
313 + /* Platform data */
314 + u32 speed_hz;
315 + unsigned fifo_size;
316 +
317 + /* Data buffers */
318 + const unsigned char *tx_ptr;
319 + unsigned char *rx_ptr;
320 +
321 + /* data iomem */
322 + u8 __iomem *tx_io;
323 + const u8 __iomem *rx_io;
324 +
325 + int remaining_bytes;
326 +
327 + struct clk *clk;
328 + struct platform_device *pdev;
329 +};
330 +
331 +static inline u8 bcm_spi_readb(struct bcm63xx_spi *bs,
332 + unsigned int offset)
333 +{
334 + return bcm_readw(bs->regs + bcm63xx_spireg(offset));
335 +}
336 +
337 +static inline u16 bcm_spi_readw(struct bcm63xx_spi *bs,
338 + unsigned int offset)
339 +{
340 + return bcm_readw(bs->regs + bcm63xx_spireg(offset));
341 +}
342 +
343 +static inline void bcm_spi_writeb(struct bcm63xx_spi *bs,
344 + u8 value, unsigned int offset)
345 +{
346 + bcm_writeb(value, bs->regs + bcm63xx_spireg(offset));
347 +}
348 +
349 +static inline void bcm_spi_writew(struct bcm63xx_spi *bs,
350 + u16 value, unsigned int offset)
351 +{
352 + bcm_writew(value, bs->regs + bcm63xx_spireg(offset));
353 +}
354 +
355 +static int bcm63xx_spi_setup_transfer(struct spi_device *spi,
356 + struct spi_transfer *t)
357 +{
358 + u8 bits_per_word;
359 + u8 clk_cfg;
360 + u32 hz;
361 + unsigned int div;
362 +
363 + struct bcm63xx_spi *bs = spi_master_get_devdata(spi->master);
364 +
365 + bits_per_word = (t) ? t->bits_per_word : spi->bits_per_word;
366 + hz = (t) ? t->speed_hz : spi->max_speed_hz;
367 + if (bits_per_word != 8) {
368 + dev_err(&spi->dev, "%s, unsupported bits_per_word=%d\n",
369 + __func__, bits_per_word);
370 + return -EINVAL;
371 + }
372 +
373 + if (spi->chip_select > spi->master->num_chipselect) {
374 + dev_err(&spi->dev, "%s, unsupported slave %d\n",
375 + __func__, spi->chip_select);
376 + return -EINVAL;
377 + }
378 +
379 + /* Check clock setting */
380 + div = (bs->speed_hz / hz);
381 + switch (div) {
382 + case 2:
383 + clk_cfg = SPI_CLK_25MHZ;
384 + break;
385 + case 4:
386 + clk_cfg = SPI_CLK_12_50MHZ;
387 + break;
388 + case 8:
389 + clk_cfg = SPI_CLK_6_250MHZ;
390 + break;
391 + case 16:
392 + clk_cfg = SPI_CLK_3_125MHZ;
393 + break;
394 + case 32:
395 + clk_cfg = SPI_CLK_1_563MHZ;
396 + break;
397 + case 64:
398 + clk_cfg = SPI_CLK_0_781MHZ;
399 + break;
400 + case 128:
401 + default:
402 + /* Set to slowest mode for compatibility */
403 + clk_cfg = SPI_CLK_0_391MHZ;
404 + break;
405 + }
406 +
407 + bcm_spi_writeb(bs, clk_cfg, SPI_CLK_CFG);
408 + dev_dbg(&spi->dev, "Setting clock register to %d (hz %d, cmd %02x)\n",
409 + div, hz, clk_cfg);
410 +
411 + return 0;
412 +}
413 +
414 +/* the spi->mode bits understood by this driver: */
415 +#define MODEBITS (SPI_CPOL | SPI_CPHA)
416 +
417 +static int bcm63xx_spi_setup(struct spi_device *spi)
418 +{
419 + struct bcm63xx_spi *bs;
420 + int ret;
421 +
422 + bs = spi_master_get_devdata(spi->master);
423 +
424 + if (bs->stopping)
425 + return -ESHUTDOWN;
426 +
427 + if (!spi->bits_per_word)
428 + spi->bits_per_word = 8;
429 +
430 + if (spi->mode & ~MODEBITS) {
431 + dev_err(&spi->dev, "%s, unsupported mode bits %x\n",
432 + __func__, spi->mode & ~MODEBITS);
433 + return -EINVAL;
434 + }
435 +
436 + ret = bcm63xx_spi_setup_transfer(spi, NULL);
437 + if (ret < 0) {
438 + dev_err(&spi->dev, "setup: unsupported mode bits %x\n",
439 + spi->mode & ~MODEBITS);
440 + return ret;
441 + }
442 +
443 + dev_dbg(&spi->dev, "%s, mode %d, %u bits/w, %u nsec/bit\n",
444 + __func__, spi->mode & MODEBITS, spi->bits_per_word, 0);
445 +
446 + return 0;
447 +}
448 +
449 +/* Fill the TX FIFO with as many bytes as possible */
450 +static void bcm63xx_spi_fill_tx_fifo(struct bcm63xx_spi *bs)
451 +{
452 + u8 size;
453 +
454 + /* Fill the Tx FIFO with as many bytes as possible */
455 + size = bs->remaining_bytes < bs->fifo_size ? bs->remaining_bytes :
456 + bs->fifo_size;
457 + memcpy_toio(bs->tx_io, bs->tx_ptr, size);
458 + bs->remaining_bytes -= size;
459 +}
460 +
461 +static int bcm63xx_txrx_bufs(struct spi_device *spi, struct spi_transfer *t)
462 +{
463 + struct bcm63xx_spi *bs = spi_master_get_devdata(spi->master);
464 + u16 msg_ctl;
465 + u16 cmd;
466 +
467 + dev_dbg(&spi->dev, "txrx: tx %p, rx %p, len %d\n",
468 + t->tx_buf, t->rx_buf, t->len);
469 +
470 + /* Transmitter is inhibited */
471 + bs->tx_ptr = t->tx_buf;
472 + bs->rx_ptr = t->rx_buf;
473 + init_completion(&bs->done);
474 +
475 + if (t->tx_buf) {
476 + bs->remaining_bytes = t->len;
477 + bcm63xx_spi_fill_tx_fifo(bs);
478 + }
479 +
480 + /* Enable the command done interrupt which
481 + * we use to determine completion of a command */
482 + bcm_spi_writeb(bs, SPI_INTR_CMD_DONE, SPI_INT_MASK);
483 +
484 + /* Fill in the Message control register */
485 + msg_ctl = (t->len << SPI_BYTE_CNT_SHIFT);
486 +
487 + if (t->rx_buf && t->tx_buf)
488 + msg_ctl |= (SPI_FD_RW << SPI_MSG_TYPE_SHIFT);
489 + else if (t->rx_buf)
490 + msg_ctl |= (SPI_HD_R << SPI_MSG_TYPE_SHIFT);
491 + else if (t->tx_buf)
492 + msg_ctl |= (SPI_HD_W << SPI_MSG_TYPE_SHIFT);
493 +
494 + bcm_spi_writew(bs, msg_ctl, SPI_MSG_CTL);
495 +
496 + /* Issue the transfer */
497 + cmd = SPI_CMD_START_IMMEDIATE;
498 + cmd |= (0 << SPI_CMD_PREPEND_BYTE_CNT_SHIFT);
499 + cmd |= (spi->chip_select << SPI_CMD_DEVICE_ID_SHIFT);
500 + bcm_spi_writew(bs, cmd, SPI_CMD);
501 + wait_for_completion(&bs->done);
502 +
503 + /* Disable the CMD_DONE interrupt */
504 + bcm_spi_writeb(bs, 0, SPI_INT_MASK);
505 +
506 + return t->len - bs->remaining_bytes;
507 +}
508 +
509 +static int bcm63xx_transfer(struct spi_device *spi, struct spi_message *m)
510 +{
511 + struct bcm63xx_spi *bs = spi_master_get_devdata(spi->master);
512 + struct spi_transfer *t;
513 + int ret = 0;
514 +
515 + if (unlikely(list_empty(&m->transfers)))
516 + return -EINVAL;
517 +
518 + if (bs->stopping)
519 + return -ESHUTDOWN;
520 +
521 + list_for_each_entry(t, &m->transfers, transfer_list) {
522 + ret += bcm63xx_txrx_bufs(spi, t);
523 + }
524 +
525 + m->complete(m->context);
526 +
527 + return ret;
528 +}
529 +
530 +/* This driver supports single master mode only. Hence
531 + * CMD_DONE is the only interrupt we care about
532 + */
533 +static irqreturn_t bcm63xx_spi_interrupt(int irq, void *dev_id)
534 +{
535 + struct spi_master *master = (struct spi_master *)dev_id;
536 + struct bcm63xx_spi *bs = spi_master_get_devdata(master);
537 + u8 intr;
538 + u16 cmd;
539 +
540 + /* Read interupts and clear them immediately */
541 + intr = bcm_spi_readb(bs, SPI_INT_STATUS);
542 + bcm_spi_writeb(bs, SPI_INTR_CLEAR_ALL, SPI_INT_STATUS);
543 + bcm_spi_writeb(bs, 0, SPI_INT_MASK);
544 +
545 + /* A tansfer completed */
546 + if (intr & SPI_INTR_CMD_DONE) {
547 + u8 rx_tail;
548 +
549 + rx_tail = bcm_spi_readb(bs, SPI_RX_TAIL);
550 +
551 + /* Read out all the data */
552 + if (rx_tail)
553 + memcpy_fromio(bs->rx_ptr, bs->rx_io, rx_tail);
554 +
555 + /* See if there is more data to send */
556 + if (bs->remaining_bytes > 0) {
557 + bcm63xx_spi_fill_tx_fifo(bs);
558 +
559 + /* Start the transfer */
560 + bcm_spi_writew(bs, SPI_HD_W << SPI_MSG_TYPE_SHIFT,
561 + SPI_MSG_CTL);
562 + cmd = bcm_spi_readw(bs, SPI_CMD);
563 + cmd |= SPI_CMD_START_IMMEDIATE;
564 + cmd |= (0 << SPI_CMD_PREPEND_BYTE_CNT_SHIFT);
565 + bcm_spi_writeb(bs, SPI_INTR_CMD_DONE, SPI_INT_MASK);
566 + bcm_spi_writew(bs, cmd, SPI_CMD);
567 + } else {
568 + complete(&bs->done);
569 + }
570 + }
571 +
572 + return IRQ_HANDLED;
573 +}
574 +
575 +
576 +static int __init bcm63xx_spi_probe(struct platform_device *pdev)
577 +{
578 + struct resource *r;
579 + struct device *dev = &pdev->dev;
580 + struct bcm63xx_spi_pdata *pdata = pdev->dev.platform_data;
581 + int irq;
582 + struct spi_master *master;
583 + struct clk *clk;
584 + struct bcm63xx_spi *bs;
585 + int ret;
586 +
587 + r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
588 + if (!r) {
589 + dev_err(dev, "no iomem\n");
590 + ret = -ENXIO;
591 + goto out;
592 + }
593 +
594 + irq = platform_get_irq(pdev, 0);
595 + if (irq < 0) {
596 + dev_err(dev, "no irq\n");
597 + ret = -ENXIO;
598 + goto out;
599 + }
600 +
601 + clk = clk_get(dev, "spi");
602 + if (IS_ERR(clk)) {
603 + dev_err(dev, "no clock for device\n");
604 + ret = -ENODEV;
605 + goto out;
606 + }
607 +
608 + master = spi_alloc_master(dev, sizeof(*bs));
609 + if (!master) {
610 + dev_err(dev, "out of memory\n");
611 + ret = -ENOMEM;
612 + goto out_free;
613 + }
614 +
615 + bs = spi_master_get_devdata(master);
616 + init_completion(&bs->done);
617 +
618 + platform_set_drvdata(pdev, master);
619 + bs->pdev = pdev;
620 +
621 + if (!request_mem_region(r->start, r->end - r->start, PFX)) {
622 + dev_err(dev, "iomem request failed\n");
623 + ret = -ENXIO;
624 + goto out_put_master;
625 + }
626 +
627 + bs->regs = ioremap_nocache(r->start, r->end - r->start);
628 + if (!bs->regs) {
629 + dev_err(dev, "unable to ioremap regs\n");
630 + ret = -ENOMEM;
631 + goto out_put_master;
632 + }
633 + bs->irq = irq;
634 + bs->clk = clk;
635 + bs->fifo_size = pdata->fifo_size;
636 +
637 + ret = request_irq(irq, bcm63xx_spi_interrupt, 0, pdev->name, master);
638 + if (ret) {
639 + dev_err(dev, "unable to request irq\n");
640 + goto out_unmap;
641 + }
642 +
643 + master->bus_num = pdata->bus_num;
644 + master->num_chipselect = pdata->num_chipselect;
645 + master->setup = bcm63xx_spi_setup;
646 + master->transfer = bcm63xx_transfer;
647 + bs->speed_hz = pdata->speed_hz;
648 + bs->stopping = 0;
649 + bs->tx_io = (u8*)(bs->regs + bcm63xx_spireg(SPI_MSG_DATA));
650 + bs->rx_io = (const u8*)(bs->regs + bcm63xx_spireg(SPI_RX_DATA));
651 + spin_lock_init(&bs->lock);
652 +
653 + /* Initialize hardware */
654 + clk_enable(bs->clk);
655 + bcm_spi_writeb(bs, SPI_INTR_CLEAR_ALL, SPI_INT_STATUS);
656 +
657 + /* register and we are done */
658 + ret = spi_register_master(master);
659 + if (ret) {
660 + dev_err(dev, "spi register failed\n");
661 + goto out_reset_hw;
662 + }
663 +
664 + dev_info(dev, "at 0x%08x (irq %d, FIFOs size %d) v%s\n",
665 + r->start, irq, bs->fifo_size, DRV_VER);
666 +
667 + return 0;
668 +
669 +out_reset_hw:
670 + clk_disable(clk);
671 + free_irq(irq, master);
672 +out_unmap:
673 + iounmap(bs->regs);
674 +out_put_master:
675 + spi_master_put(master);
676 +out_free:
677 + clk_put(clk);
678 +out:
679 + return ret;
680 +}
681 +
682 +static int __exit bcm63xx_spi_remove(struct platform_device *pdev)
683 +{
684 + struct spi_master *master = platform_get_drvdata(pdev);
685 + struct bcm63xx_spi *bs = spi_master_get_devdata(master);
686 + struct resource *r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
687 +
688 + /* reset spi block */
689 + bcm_spi_writeb(bs, 0, SPI_INT_MASK);
690 + spin_lock(&bs->lock);
691 + bs->stopping = 1;
692 +
693 + /* HW shutdown */
694 + clk_disable(bs->clk);
695 + clk_put(bs->clk);
696 +
697 + spin_unlock(&bs->lock);
698 +
699 + free_irq(bs->irq, master);
700 + iounmap(bs->regs);
701 + release_mem_region(r->start, r->end - r->start);
702 + platform_set_drvdata(pdev, 0);
703 + spi_unregister_master(master);
704 +
705 + return 0;
706 +}
707 +
708 +#ifdef CONFIG_PM
709 +static int bcm63xx_spi_suspend(struct platform_device *pdev, pm_message_t mesg)
710 +{
711 + struct spi_master *master = platform_get_drvdata(pdev);
712 + struct bcm63xx_spi *bs = spi_master_get_devdata(master);
713 +
714 + clk_disable(bs->clk);
715 +
716 + return 0;
717 +}
718 +
719 +static int bcm63xx_spi_resume(struct platform_device *pdev)
720 +{
721 + struct spi_master *master = platform_get_drvdata(pdev);
722 + struct bcm63xx_spi *bs = spi_master_get_devdata(master);
723 +
724 + clk_enable(bs->clk);
725 +
726 + return 0;
727 +}
728 +#else
729 +#define bcm63xx_spi_suspend NULL
730 +#define bcm63xx_spi_resume NULL
731 +#endif
732 +
733 +static struct platform_driver bcm63xx_spi_driver = {
734 + .driver = {
735 + .name = "bcm63xx-spi",
736 + .owner = THIS_MODULE,
737 + },
738 + .probe = bcm63xx_spi_probe,
739 + .remove = __exit_p(bcm63xx_spi_remove),
740 + .suspend = bcm63xx_spi_suspend,
741 + .resume = bcm63xx_spi_resume,
742 +};
743 +
744 +
745 +static int __init bcm63xx_spi_init(void)
746 +{
747 + return platform_driver_register(&bcm63xx_spi_driver);
748 +}
749 +
750 +static void __exit bcm63xx_spi_exit(void)
751 +{
752 + platform_driver_unregister(&bcm63xx_spi_driver);
753 +}
754 +
755 +module_init(bcm63xx_spi_init);
756 +module_exit(bcm63xx_spi_exit);
757 +
758 +MODULE_ALIAS("platform:bcm63xx_spi");
759 +MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
760 +MODULE_AUTHOR("Tanguy Bouzeloc <tanguy.bouzeloc@efixo.com>");
761 +MODULE_DESCRIPTION("Broadcom BCM63xx SPI Controller driver");
762 +MODULE_LICENSE("GPL");
763 +MODULE_VERSION(DRV_VER);
764 --- a/drivers/spi/Kconfig
765 +++ b/drivers/spi/Kconfig
766 @@ -74,6 +74,12 @@ config SPI_ATMEL
767 This selects a driver for the Atmel SPI Controller, present on
768 many AT32 (AVR32) and AT91 (ARM) chips.
769
770 +config SPI_BCM63XX
771 + tristate "Broadcom BCM63xx SPI controller"
772 + depends on BCM63XX
773 + help
774 + This is the SPI controller master driver for Broadcom BCM63xx SoC.
775 +
776 config SPI_BFIN
777 tristate "SPI controller driver for ADI Blackfin5xx"
778 depends on BLACKFIN
779 --- a/drivers/spi/Makefile
780 +++ b/drivers/spi/Makefile
781 @@ -14,6 +14,7 @@ obj-$(CONFIG_SPI_ALTERA) += spi-altera.
782 obj-$(CONFIG_SPI_ATMEL) += spi-atmel.o
783 obj-$(CONFIG_SPI_ATH79) += spi-ath79.o
784 obj-$(CONFIG_SPI_AU1550) += spi-au1550.o
785 +obj-$(CONFIG_SPI_BCM63XX) += bcm63xx_spi.o
786 obj-$(CONFIG_SPI_BFIN) += spi-bfin5xx.o
787 obj-$(CONFIG_SPI_BFIN_SPORT) += spi-bfin-sport.o
788 obj-$(CONFIG_SPI_BITBANG) += spi-bitbang.o
789 --- /dev/null
790 +++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_spi.h
791 @@ -0,0 +1,85 @@
792 +#ifndef BCM63XX_DEV_SPI_H
793 +#define BCM63XX_DEV_SPI_H
794 +
795 +#include <linux/types.h>
796 +#include <bcm63xx_io.h>
797 +#include <bcm63xx_regs.h>
798 +
799 +int __init bcm63xx_spi_register(void);
800 +
801 +struct bcm63xx_spi_pdata {
802 + unsigned int fifo_size;
803 + int bus_num;
804 + int num_chipselect;
805 + u32 speed_hz;
806 +};
807 +
808 +enum bcm63xx_regs_spi {
809 + SPI_CMD,
810 + SPI_INT_STATUS,
811 + SPI_INT_MASK_ST,
812 + SPI_INT_MASK,
813 + SPI_ST,
814 + SPI_CLK_CFG,
815 + SPI_FILL_BYTE,
816 + SPI_MSG_TAIL,
817 + SPI_RX_TAIL,
818 + SPI_MSG_CTL,
819 + SPI_MSG_DATA,
820 + SPI_RX_DATA,
821 +};
822 +
823 +#define __GEN_SPI_RSET_BASE(__cpu, __rset) \
824 + case SPI_## __rset: \
825 + return SPI_BCM_## __cpu ##_SPI_## __rset;
826 +
827 +#define __GEN_SPI_RSET(__cpu) \
828 + switch (reg) { \
829 + __GEN_SPI_RSET_BASE(__cpu, CMD) \
830 + __GEN_SPI_RSET_BASE(__cpu, INT_STATUS) \
831 + __GEN_SPI_RSET_BASE(__cpu, INT_MASK_ST) \
832 + __GEN_SPI_RSET_BASE(__cpu, INT_MASK) \
833 + __GEN_SPI_RSET_BASE(__cpu, ST) \
834 + __GEN_SPI_RSET_BASE(__cpu, CLK_CFG) \
835 + __GEN_SPI_RSET_BASE(__cpu, FILL_BYTE) \
836 + __GEN_SPI_RSET_BASE(__cpu, MSG_TAIL) \
837 + __GEN_SPI_RSET_BASE(__cpu, RX_TAIL) \
838 + __GEN_SPI_RSET_BASE(__cpu, MSG_CTL) \
839 + __GEN_SPI_RSET_BASE(__cpu, MSG_DATA) \
840 + __GEN_SPI_RSET_BASE(__cpu, RX_DATA) \
841 + }
842 +
843 +#define __GEN_SPI_REGS_TABLE(__cpu) \
844 + [SPI_CMD] = SPI_BCM_## __cpu ##_SPI_CMD, \
845 + [SPI_INT_STATUS] = SPI_BCM_## __cpu ##_SPI_INT_STATUS, \
846 + [SPI_INT_MASK_ST] = SPI_BCM_## __cpu ##_SPI_INT_MASK_ST, \
847 + [SPI_INT_MASK] = SPI_BCM_## __cpu ##_SPI_INT_MASK, \
848 + [SPI_ST] = SPI_BCM_## __cpu ##_SPI_ST, \
849 + [SPI_CLK_CFG] = SPI_BCM_## __cpu ##_SPI_CLK_CFG, \
850 + [SPI_FILL_BYTE] = SPI_BCM_## __cpu ##_SPI_FILL_BYTE, \
851 + [SPI_MSG_TAIL] = SPI_BCM_## __cpu ##_SPI_MSG_TAIL, \
852 + [SPI_RX_TAIL] = SPI_BCM_## __cpu ##_SPI_RX_TAIL, \
853 + [SPI_MSG_CTL] = SPI_BCM_## __cpu ##_SPI_MSG_CTL, \
854 + [SPI_MSG_DATA] = SPI_BCM_## __cpu ##_SPI_MSG_DATA, \
855 + [SPI_RX_DATA] = SPI_BCM_## __cpu ##_SPI_RX_DATA,
856 +
857 +static inline unsigned long bcm63xx_spireg(enum bcm63xx_regs_spi reg)
858 +{
859 +#ifdef BCMCPU_RUNTIME_DETECT
860 + extern const unsigned long *bcm63xx_regs_spi;
861 + return bcm63xx_regs_spi[reg];
862 +#else
863 +#ifdef CONFIG_BCM63XX_CPU_6338
864 + __GEN_SPI_RSET(6338)
865 +#endif
866 +#ifdef CONFIG_BCM63XX_CPU_6348
867 + __GEN_SPI_RSET(6348)
868 +#endif
869 +#ifdef CONFIG_BCM63XX_CPU_6358
870 + __GEN_SPI_RSET(6358)
871 +#endif
872 +#endif
873 + return 0;
874 +}
875 +
876 +#endif /* BCM63XX_DEV_SPI_H */
877 --- a/arch/mips/bcm63xx/Makefile
878 +++ b/arch/mips/bcm63xx/Makefile
879 @@ -1,5 +1,5 @@
880 obj-y += clk.o cpu.o cs.o gpio.o irq.o prom.o setup.o timer.o \
881 - dev-dsp.o dev-enet.o dev-pcmcia.o dev-uart.o \
882 + dev-dsp.o dev-enet.o dev-pcmcia.o dev-spi.o dev-uart.o \
883 dev-usb-ehci.o dev-usb-ohci.o dev-wdt.o
884 obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
885
886 --- a/arch/mips/bcm63xx/boards/board_bcm963xx.c
887 +++ b/arch/mips/bcm63xx/boards/board_bcm963xx.c
888 @@ -30,6 +30,7 @@
889 #include <bcm63xx_dev_pcmcia.h>
890 #include <bcm63xx_dev_usb_ohci.h>
891 #include <bcm63xx_dev_usb_ehci.h>
892 +#include <bcm63xx_dev_spi.h>
893 #include <board_bcm963xx.h>
894
895 #define PFX "board_bcm963xx: "
896 @@ -949,6 +950,8 @@ int __init board_register_devices(void)
897 if (board.num_spis)
898 spi_register_board_info(board.spis, board.num_spis);
899
900 + bcm63xx_spi_register();
901 +
902 /* read base address of boot chip select (0) */
903 val = bcm_mpi_readl(MPI_CSBASE_REG(0));
904 val &= MPI_CSBASE_BASE_MASK;
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