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ar71xx: use AR8327 on the DB120 board
[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 @@ -214,8 +215,8 @@ 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_UDC0_BASE (0xfffe0800)
145 +#define BCM_6358_SPI_BASE (0xfffe0800)
146 +#define BCM_6358_UDC0_BASE (0xdeadbeef)
147 #define BCM_6358_OHCI0_BASE (0xfffe1400)
148 #define BCM_6358_OHCI_PRIV_BASE (0xdeadbeef)
149 #define BCM_6358_USBH_PRIV_BASE (0xfffe1500)
150 @@ -441,6 +442,7 @@ static inline unsigned long bcm63xx_regs
151 */
152 enum bcm63xx_irq {
153 IRQ_TIMER = 0,
154 + IRQ_SPI,
155 IRQ_UART0,
156 IRQ_UART1,
157 IRQ_DSL,
158 @@ -506,6 +508,7 @@ enum bcm63xx_irq {
159 * 6348 irqs
160 */
161 #define BCM_6348_TIMER_IRQ (IRQ_INTERNAL_BASE + 0)
162 +#define BCM_6348_SPI_IRQ (IRQ_INTERNAL_BASE + 1)
163 #define BCM_6348_UART0_IRQ (IRQ_INTERNAL_BASE + 2)
164 #define BCM_6348_DSL_IRQ (IRQ_INTERNAL_BASE + 4)
165 #define BCM_6348_ENET1_IRQ (IRQ_INTERNAL_BASE + 7)
166 @@ -523,6 +526,7 @@ enum bcm63xx_irq {
167 * 6358 irqs
168 */
169 #define BCM_6358_TIMER_IRQ (IRQ_INTERNAL_BASE + 0)
170 +#define BCM_6358_SPI_IRQ (IRQ_INTERNAL_BASE + 1)
171 #define BCM_6358_UART0_IRQ (IRQ_INTERNAL_BASE + 2)
172 #define BCM_6358_UART1_IRQ (IRQ_INTERNAL_BASE + 3)
173 #define BCM_6358_OHCI0_IRQ (IRQ_INTERNAL_BASE + 5)
174 --- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
175 +++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
176 @@ -804,4 +804,116 @@
177 #define DMIPSPLLCFG_N2_SHIFT 29
178 #define DMIPSPLLCFG_N2_MASK (0x7 << DMIPSPLLCFG_N2_SHIFT)
179
180 +/*************************************************************************
181 + * _REG relative to RSET_SPI
182 + *************************************************************************/
183 +
184 +/* BCM 6338 SPI core */
185 +#define SPI_BCM_6338_SPI_CMD 0x00 /* 16-bits register */
186 +#define SPI_BCM_6338_SPI_INT_STATUS 0x02
187 +#define SPI_BCM_6338_SPI_INT_MASK_ST 0x03
188 +#define SPI_BCM_6338_SPI_INT_MASK 0x04
189 +#define SPI_BCM_6338_SPI_ST 0x05
190 +#define SPI_BCM_6338_SPI_CLK_CFG 0x06
191 +#define SPI_BCM_6338_SPI_FILL_BYTE 0x07
192 +#define SPI_BCM_6338_SPI_MSG_TAIL 0x09
193 +#define SPI_BCM_6338_SPI_RX_TAIL 0x0b
194 +#define SPI_BCM_6338_SPI_MSG_CTL 0x40
195 +#define SPI_BCM_6338_SPI_MSG_DATA 0x41
196 +#define SPI_BCM_6338_SPI_MSG_DATA_SIZE 0x3f
197 +#define SPI_BCM_6338_SPI_RX_DATA 0x80
198 +#define SPI_BCM_6338_SPI_RX_DATA_SIZE 0x3f
199 +
200 +/* BCM 6348 SPI core */
201 +#define SPI_BCM_6348_SPI_CMD 0x00 /* 16-bits register */
202 +#define SPI_BCM_6348_SPI_INT_STATUS 0x02
203 +#define SPI_BCM_6348_SPI_INT_MASK_ST 0x03
204 +#define SPI_BCM_6348_SPI_INT_MASK 0x04
205 +#define SPI_BCM_6348_SPI_ST 0x05
206 +#define SPI_BCM_6348_SPI_CLK_CFG 0x06
207 +#define SPI_BCM_6348_SPI_FILL_BYTE 0x07
208 +#define SPI_BCM_6348_SPI_MSG_TAIL 0x09
209 +#define SPI_BCM_6348_SPI_RX_TAIL 0x0b
210 +#define SPI_BCM_6348_SPI_MSG_CTL 0x40
211 +#define SPI_BCM_6348_SPI_MSG_DATA 0x41
212 +#define SPI_BCM_6348_SPI_MSG_DATA_SIZE 0x3f
213 +#define SPI_BCM_6348_SPI_RX_DATA 0x80
214 +#define SPI_BCM_6348_SPI_RX_DATA_SIZE 0x3f
215 +
216 +/* BCM 6358 SPI core */
217 +#define SPI_BCM_6358_SPI_MSG_CTL 0x00 /* 16-bits register */
218 +
219 +#define SPI_BCM_6358_SPI_MSG_DATA 0x02
220 +#define SPI_BCM_6358_SPI_MSG_DATA_SIZE 0x21e
221 +
222 +#define SPI_BCM_6358_SPI_RX_DATA 0x400
223 +#define SPI_BCM_6358_SPI_RX_DATA_SIZE 0x220
224 +
225 +#define SPI_BCM_6358_SPI_CMD 0x700 /* 16-bits register */
226 +
227 +#define SPI_BCM_6358_SPI_INT_STATUS 0x702
228 +#define SPI_BCM_6358_SPI_INT_MASK_ST 0x703
229 +
230 +#define SPI_BCM_6358_SPI_INT_MASK 0x704
231 +
232 +#define SPI_BCM_6358_SPI_ST 0x705
233 +
234 +#define SPI_BCM_6358_SPI_CLK_CFG 0x706
235 +
236 +#define SPI_BCM_6358_SPI_FILL_BYTE 0x707
237 +#define SPI_BCM_6358_SPI_MSG_TAIL 0x709
238 +#define SPI_BCM_6358_SPI_RX_TAIL 0x70B
239 +
240 +/* Shared SPI definitions */
241 +
242 +/* Message configuration */
243 +#define SPI_FD_RW 0x00
244 +#define SPI_HD_W 0x01
245 +#define SPI_HD_R 0x02
246 +#define SPI_BYTE_CNT_SHIFT 0
247 +#define SPI_MSG_TYPE_SHIFT 14
248 +
249 +/* Command */
250 +#define SPI_CMD_NOOP 0x00
251 +#define SPI_CMD_SOFT_RESET 0x01
252 +#define SPI_CMD_HARD_RESET 0x02
253 +#define SPI_CMD_START_IMMEDIATE 0x03
254 +#define SPI_CMD_COMMAND_SHIFT 0
255 +#define SPI_CMD_COMMAND_MASK 0x000f
256 +#define SPI_CMD_DEVICE_ID_SHIFT 4
257 +#define SPI_CMD_PREPEND_BYTE_CNT_SHIFT 8
258 +#define SPI_CMD_ONE_BYTE_SHIFT 11
259 +#define SPI_CMD_ONE_WIRE_SHIFT 12
260 +#define SPI_DEV_ID_0 0
261 +#define SPI_DEV_ID_1 1
262 +#define SPI_DEV_ID_2 2
263 +#define SPI_DEV_ID_3 3
264 +
265 +/* Interrupt mask */
266 +#define SPI_INTR_CMD_DONE 0x01
267 +#define SPI_INTR_RX_OVERFLOW 0x02
268 +#define SPI_INTR_TX_UNDERFLOW 0x04
269 +#define SPI_INTR_TX_OVERFLOW 0x08
270 +#define SPI_INTR_RX_UNDERFLOW 0x10
271 +#define SPI_INTR_CLEAR_ALL 0x1f
272 +
273 +/* Status */
274 +#define SPI_RX_EMPTY 0x02
275 +#define SPI_CMD_BUSY 0x04
276 +#define SPI_SERIAL_BUSY 0x08
277 +
278 +/* Clock configuration */
279 +#define SPI_CLK_20MHZ 0x00
280 +#define SPI_CLK_0_391MHZ 0x01
281 +#define SPI_CLK_0_781MHZ 0x02 /* default */
282 +#define SPI_CLK_1_563MHZ 0x03
283 +#define SPI_CLK_3_125MHZ 0x04
284 +#define SPI_CLK_6_250MHZ 0x05
285 +#define SPI_CLK_12_50MHZ 0x06
286 +#define SPI_CLK_25MHZ 0x07
287 +#define SPI_CLK_MASK 0x07
288 +#define SPI_SSOFFTIME_MASK 0x38
289 +#define SPI_SSOFFTIME_SHIFT 3
290 +#define SPI_BYTE_SWAP 0x80
291 +
292 #endif /* BCM63XX_REGS_H_ */
293 --- /dev/null
294 +++ b/drivers/spi/bcm63xx_spi.c
295 @@ -0,0 +1,496 @@
296 +/*
297 + * Broadcom BCM63xx SPI controller support
298 + *
299 + * Copyright (C) 2009 Florian Fainelli <florian@openwrt.org>
300 + * Copyright (C) 2010 Tanguy Bouzeloc <tanguy.bouzeloc@efixo.com>
301 + *
302 + * This program is free software; you can redistribute it and/or
303 + * modify it under the terms of the GNU General Public License
304 + * as published by the Free Software Foundation; either version 2
305 + * of the License, or (at your option) any later version.
306 + *
307 + * This program is distributed in the hope that it will be useful,
308 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
309 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
310 + * GNU General Public License for more details.
311 + *
312 + * You should have received a copy of the GNU General Public License
313 + * along with this program; if not, write to the
314 + * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
315 + */
316 +
317 +#include <linux/kernel.h>
318 +#include <linux/init.h>
319 +#include <linux/clk.h>
320 +#include <linux/module.h>
321 +#include <linux/platform_device.h>
322 +#include <linux/delay.h>
323 +#include <linux/interrupt.h>
324 +#include <linux/spi/spi.h>
325 +#include <linux/completion.h>
326 +#include <linux/err.h>
327 +
328 +#include <bcm63xx_dev_spi.h>
329 +
330 +#define PFX KBUILD_MODNAME
331 +#define DRV_VER "0.1.2"
332 +
333 +struct bcm63xx_spi {
334 + spinlock_t lock;
335 + int stopping;
336 + struct completion done;
337 +
338 + void __iomem *regs;
339 + int irq;
340 +
341 + /* Platform data */
342 + u32 speed_hz;
343 + unsigned fifo_size;
344 +
345 + /* Data buffers */
346 + const unsigned char *tx_ptr;
347 + unsigned char *rx_ptr;
348 +
349 + /* data iomem */
350 + u8 __iomem *tx_io;
351 + const u8 __iomem *rx_io;
352 +
353 + int remaining_bytes;
354 +
355 + struct clk *clk;
356 + struct platform_device *pdev;
357 +};
358 +
359 +static inline u8 bcm_spi_readb(struct bcm63xx_spi *bs,
360 + unsigned int offset)
361 +{
362 + return bcm_readw(bs->regs + bcm63xx_spireg(offset));
363 +}
364 +
365 +static inline u16 bcm_spi_readw(struct bcm63xx_spi *bs,
366 + unsigned int offset)
367 +{
368 + return bcm_readw(bs->regs + bcm63xx_spireg(offset));
369 +}
370 +
371 +static inline void bcm_spi_writeb(struct bcm63xx_spi *bs,
372 + u8 value, unsigned int offset)
373 +{
374 + bcm_writeb(value, bs->regs + bcm63xx_spireg(offset));
375 +}
376 +
377 +static inline void bcm_spi_writew(struct bcm63xx_spi *bs,
378 + u16 value, unsigned int offset)
379 +{
380 + bcm_writew(value, bs->regs + bcm63xx_spireg(offset));
381 +}
382 +
383 +static int bcm63xx_spi_setup_transfer(struct spi_device *spi,
384 + struct spi_transfer *t)
385 +{
386 + u8 bits_per_word;
387 + u8 clk_cfg;
388 + u32 hz;
389 + unsigned int div;
390 +
391 + struct bcm63xx_spi *bs = spi_master_get_devdata(spi->master);
392 +
393 + bits_per_word = (t) ? t->bits_per_word : spi->bits_per_word;
394 + hz = (t) ? t->speed_hz : spi->max_speed_hz;
395 + if (bits_per_word != 8) {
396 + dev_err(&spi->dev, "%s, unsupported bits_per_word=%d\n",
397 + __func__, bits_per_word);
398 + return -EINVAL;
399 + }
400 +
401 + if (spi->chip_select > spi->master->num_chipselect) {
402 + dev_err(&spi->dev, "%s, unsupported slave %d\n",
403 + __func__, spi->chip_select);
404 + return -EINVAL;
405 + }
406 +
407 + /* Check clock setting */
408 + div = (bs->speed_hz / hz);
409 + switch (div) {
410 + case 2:
411 + clk_cfg = SPI_CLK_25MHZ;
412 + break;
413 + case 4:
414 + clk_cfg = SPI_CLK_12_50MHZ;
415 + break;
416 + case 8:
417 + clk_cfg = SPI_CLK_6_250MHZ;
418 + break;
419 + case 16:
420 + clk_cfg = SPI_CLK_3_125MHZ;
421 + break;
422 + case 32:
423 + clk_cfg = SPI_CLK_1_563MHZ;
424 + break;
425 + case 64:
426 + clk_cfg = SPI_CLK_0_781MHZ;
427 + break;
428 + case 128:
429 + default:
430 + /* Set to slowest mode for compatibility */
431 + clk_cfg = SPI_CLK_0_391MHZ;
432 + break;
433 + }
434 +
435 + bcm_spi_writeb(bs, clk_cfg, SPI_CLK_CFG);
436 + dev_dbg(&spi->dev, "Setting clock register to %d (hz %d, cmd %02x)\n",
437 + div, hz, clk_cfg);
438 +
439 + return 0;
440 +}
441 +
442 +/* the spi->mode bits understood by this driver: */
443 +#define MODEBITS (SPI_CPOL | SPI_CPHA)
444 +
445 +static int bcm63xx_spi_setup(struct spi_device *spi)
446 +{
447 + struct bcm63xx_spi *bs;
448 + int ret;
449 +
450 + bs = spi_master_get_devdata(spi->master);
451 +
452 + if (bs->stopping)
453 + return -ESHUTDOWN;
454 +
455 + if (!spi->bits_per_word)
456 + spi->bits_per_word = 8;
457 +
458 + if (spi->mode & ~MODEBITS) {
459 + dev_err(&spi->dev, "%s, unsupported mode bits %x\n",
460 + __func__, spi->mode & ~MODEBITS);
461 + return -EINVAL;
462 + }
463 +
464 + ret = bcm63xx_spi_setup_transfer(spi, NULL);
465 + if (ret < 0) {
466 + dev_err(&spi->dev, "setup: unsupported mode bits %x\n",
467 + spi->mode & ~MODEBITS);
468 + return ret;
469 + }
470 +
471 + dev_dbg(&spi->dev, "%s, mode %d, %u bits/w, %u nsec/bit\n",
472 + __func__, spi->mode & MODEBITS, spi->bits_per_word, 0);
473 +
474 + return 0;
475 +}
476 +
477 +/* Fill the TX FIFO with as many bytes as possible */
478 +static void bcm63xx_spi_fill_tx_fifo(struct bcm63xx_spi *bs)
479 +{
480 + u8 size;
481 +
482 + /* Fill the Tx FIFO with as many bytes as possible */
483 + size = bs->remaining_bytes < bs->fifo_size ? bs->remaining_bytes :
484 + bs->fifo_size;
485 + memcpy_toio(bs->tx_io, bs->tx_ptr, size);
486 + bs->remaining_bytes -= size;
487 +}
488 +
489 +static int bcm63xx_txrx_bufs(struct spi_device *spi, struct spi_transfer *t)
490 +{
491 + struct bcm63xx_spi *bs = spi_master_get_devdata(spi->master);
492 + u16 msg_ctl;
493 + u16 cmd;
494 +
495 + dev_dbg(&spi->dev, "txrx: tx %p, rx %p, len %d\n",
496 + t->tx_buf, t->rx_buf, t->len);
497 +
498 + /* Transmitter is inhibited */
499 + bs->tx_ptr = t->tx_buf;
500 + bs->rx_ptr = t->rx_buf;
501 + init_completion(&bs->done);
502 +
503 + if (t->tx_buf) {
504 + bs->remaining_bytes = t->len;
505 + bcm63xx_spi_fill_tx_fifo(bs);
506 + }
507 +
508 + /* Enable the command done interrupt which
509 + * we use to determine completion of a command */
510 + bcm_spi_writeb(bs, SPI_INTR_CMD_DONE, SPI_INT_MASK);
511 +
512 + /* Fill in the Message control register */
513 + msg_ctl = (t->len << SPI_BYTE_CNT_SHIFT);
514 +
515 + if (t->rx_buf && t->tx_buf)
516 + msg_ctl |= (SPI_FD_RW << SPI_MSG_TYPE_SHIFT);
517 + else if (t->rx_buf)
518 + msg_ctl |= (SPI_HD_R << SPI_MSG_TYPE_SHIFT);
519 + else if (t->tx_buf)
520 + msg_ctl |= (SPI_HD_W << SPI_MSG_TYPE_SHIFT);
521 +
522 + bcm_spi_writew(bs, msg_ctl, SPI_MSG_CTL);
523 +
524 + /* Issue the transfer */
525 + cmd = SPI_CMD_START_IMMEDIATE;
526 + cmd |= (0 << SPI_CMD_PREPEND_BYTE_CNT_SHIFT);
527 + cmd |= (spi->chip_select << SPI_CMD_DEVICE_ID_SHIFT);
528 + bcm_spi_writew(bs, cmd, SPI_CMD);
529 + wait_for_completion(&bs->done);
530 +
531 + /* Disable the CMD_DONE interrupt */
532 + bcm_spi_writeb(bs, 0, SPI_INT_MASK);
533 +
534 + return t->len - bs->remaining_bytes;
535 +}
536 +
537 +static int bcm63xx_transfer(struct spi_device *spi, struct spi_message *m)
538 +{
539 + struct bcm63xx_spi *bs = spi_master_get_devdata(spi->master);
540 + struct spi_transfer *t;
541 + int ret = 0;
542 +
543 + if (unlikely(list_empty(&m->transfers)))
544 + return -EINVAL;
545 +
546 + if (bs->stopping)
547 + return -ESHUTDOWN;
548 +
549 + list_for_each_entry(t, &m->transfers, transfer_list) {
550 + ret += bcm63xx_txrx_bufs(spi, t);
551 + }
552 +
553 + m->complete(m->context);
554 +
555 + return ret;
556 +}
557 +
558 +/* This driver supports single master mode only. Hence
559 + * CMD_DONE is the only interrupt we care about
560 + */
561 +static irqreturn_t bcm63xx_spi_interrupt(int irq, void *dev_id)
562 +{
563 + struct spi_master *master = (struct spi_master *)dev_id;
564 + struct bcm63xx_spi *bs = spi_master_get_devdata(master);
565 + u8 intr;
566 + u16 cmd;
567 +
568 + /* Read interupts and clear them immediately */
569 + intr = bcm_spi_readb(bs, SPI_INT_STATUS);
570 + bcm_spi_writeb(bs, SPI_INTR_CLEAR_ALL, SPI_INT_STATUS);
571 + bcm_spi_writeb(bs, 0, SPI_INT_MASK);
572 +
573 + /* A tansfer completed */
574 + if (intr & SPI_INTR_CMD_DONE) {
575 + u8 rx_tail;
576 +
577 + rx_tail = bcm_spi_readb(bs, SPI_RX_TAIL);
578 +
579 + /* Read out all the data */
580 + if (rx_tail)
581 + memcpy_fromio(bs->rx_ptr, bs->rx_io, rx_tail);
582 +
583 + /* See if there is more data to send */
584 + if (bs->remaining_bytes > 0) {
585 + bcm63xx_spi_fill_tx_fifo(bs);
586 +
587 + /* Start the transfer */
588 + bcm_spi_writew(bs, SPI_HD_W << SPI_MSG_TYPE_SHIFT,
589 + SPI_MSG_CTL);
590 + cmd = bcm_spi_readw(bs, SPI_CMD);
591 + cmd |= SPI_CMD_START_IMMEDIATE;
592 + cmd |= (0 << SPI_CMD_PREPEND_BYTE_CNT_SHIFT);
593 + bcm_spi_writeb(bs, SPI_INTR_CMD_DONE, SPI_INT_MASK);
594 + bcm_spi_writew(bs, cmd, SPI_CMD);
595 + } else {
596 + complete(&bs->done);
597 + }
598 + }
599 +
600 + return IRQ_HANDLED;
601 +}
602 +
603 +
604 +static int __init bcm63xx_spi_probe(struct platform_device *pdev)
605 +{
606 + struct resource *r;
607 + struct device *dev = &pdev->dev;
608 + struct bcm63xx_spi_pdata *pdata = pdev->dev.platform_data;
609 + int irq;
610 + struct spi_master *master;
611 + struct clk *clk;
612 + struct bcm63xx_spi *bs;
613 + int ret;
614 +
615 + r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
616 + if (!r) {
617 + dev_err(dev, "no iomem\n");
618 + ret = -ENXIO;
619 + goto out;
620 + }
621 +
622 + irq = platform_get_irq(pdev, 0);
623 + if (irq < 0) {
624 + dev_err(dev, "no irq\n");
625 + ret = -ENXIO;
626 + goto out;
627 + }
628 +
629 + clk = clk_get(dev, "spi");
630 + if (IS_ERR(clk)) {
631 + dev_err(dev, "no clock for device\n");
632 + ret = -ENODEV;
633 + goto out;
634 + }
635 +
636 + master = spi_alloc_master(dev, sizeof(*bs));
637 + if (!master) {
638 + dev_err(dev, "out of memory\n");
639 + ret = -ENOMEM;
640 + goto out_free;
641 + }
642 +
643 + bs = spi_master_get_devdata(master);
644 + init_completion(&bs->done);
645 +
646 + platform_set_drvdata(pdev, master);
647 + bs->pdev = pdev;
648 +
649 + if (!request_mem_region(r->start, r->end - r->start, PFX)) {
650 + dev_err(dev, "iomem request failed\n");
651 + ret = -ENXIO;
652 + goto out_put_master;
653 + }
654 +
655 + bs->regs = ioremap_nocache(r->start, r->end - r->start);
656 + if (!bs->regs) {
657 + dev_err(dev, "unable to ioremap regs\n");
658 + ret = -ENOMEM;
659 + goto out_put_master;
660 + }
661 + bs->irq = irq;
662 + bs->clk = clk;
663 + bs->fifo_size = pdata->fifo_size;
664 +
665 + ret = request_irq(irq, bcm63xx_spi_interrupt, 0, pdev->name, master);
666 + if (ret) {
667 + dev_err(dev, "unable to request irq\n");
668 + goto out_unmap;
669 + }
670 +
671 + master->bus_num = pdata->bus_num;
672 + master->num_chipselect = pdata->num_chipselect;
673 + master->setup = bcm63xx_spi_setup;
674 + master->transfer = bcm63xx_transfer;
675 + bs->speed_hz = pdata->speed_hz;
676 + bs->stopping = 0;
677 + bs->tx_io = (u8*)(bs->regs + bcm63xx_spireg(SPI_MSG_DATA));
678 + bs->rx_io = (const u8*)(bs->regs + bcm63xx_spireg(SPI_RX_DATA));
679 + spin_lock_init(&bs->lock);
680 +
681 + /* Initialize hardware */
682 + clk_enable(bs->clk);
683 + bcm_spi_writeb(bs, SPI_INTR_CLEAR_ALL, SPI_INT_STATUS);
684 +
685 + /* register and we are done */
686 + ret = spi_register_master(master);
687 + if (ret) {
688 + dev_err(dev, "spi register failed\n");
689 + goto out_reset_hw;
690 + }
691 +
692 + dev_info(dev, "at 0x%08x (irq %d, FIFOs size %d) v%s\n",
693 + r->start, irq, bs->fifo_size, DRV_VER);
694 +
695 + return 0;
696 +
697 +out_reset_hw:
698 + clk_disable(clk);
699 + free_irq(irq, master);
700 +out_unmap:
701 + iounmap(bs->regs);
702 +out_put_master:
703 + spi_master_put(master);
704 +out_free:
705 + clk_put(clk);
706 +out:
707 + return ret;
708 +}
709 +
710 +static int __exit bcm63xx_spi_remove(struct platform_device *pdev)
711 +{
712 + struct spi_master *master = platform_get_drvdata(pdev);
713 + struct bcm63xx_spi *bs = spi_master_get_devdata(master);
714 + struct resource *r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
715 +
716 + /* reset spi block */
717 + bcm_spi_writeb(bs, 0, SPI_INT_MASK);
718 + spin_lock(&bs->lock);
719 + bs->stopping = 1;
720 +
721 + /* HW shutdown */
722 + clk_disable(bs->clk);
723 + clk_put(bs->clk);
724 +
725 + spin_unlock(&bs->lock);
726 +
727 + free_irq(bs->irq, master);
728 + iounmap(bs->regs);
729 + release_mem_region(r->start, r->end - r->start);
730 + platform_set_drvdata(pdev, 0);
731 + spi_unregister_master(master);
732 +
733 + return 0;
734 +}
735 +
736 +#ifdef CONFIG_PM
737 +static int bcm63xx_spi_suspend(struct platform_device *pdev, pm_message_t mesg)
738 +{
739 + struct spi_master *master = platform_get_drvdata(pdev);
740 + struct bcm63xx_spi *bs = spi_master_get_devdata(master);
741 +
742 + clk_disable(bs->clk);
743 +
744 + return 0;
745 +}
746 +
747 +static int bcm63xx_spi_resume(struct platform_device *pdev)
748 +{
749 + struct spi_master *master = platform_get_drvdata(pdev);
750 + struct bcm63xx_spi *bs = spi_master_get_devdata(master);
751 +
752 + clk_enable(bs->clk);
753 +
754 + return 0;
755 +}
756 +#else
757 +#define bcm63xx_spi_suspend NULL
758 +#define bcm63xx_spi_resume NULL
759 +#endif
760 +
761 +static struct platform_driver bcm63xx_spi_driver = {
762 + .driver = {
763 + .name = "bcm63xx-spi",
764 + .owner = THIS_MODULE,
765 + },
766 + .probe = bcm63xx_spi_probe,
767 + .remove = __exit_p(bcm63xx_spi_remove),
768 + .suspend = bcm63xx_spi_suspend,
769 + .resume = bcm63xx_spi_resume,
770 +};
771 +
772 +
773 +static int __init bcm63xx_spi_init(void)
774 +{
775 + return platform_driver_register(&bcm63xx_spi_driver);
776 +}
777 +
778 +static void __exit bcm63xx_spi_exit(void)
779 +{
780 + platform_driver_unregister(&bcm63xx_spi_driver);
781 +}
782 +
783 +module_init(bcm63xx_spi_init);
784 +module_exit(bcm63xx_spi_exit);
785 +
786 +MODULE_ALIAS("platform:bcm63xx_spi");
787 +MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
788 +MODULE_AUTHOR("Tanguy Bouzeloc <tanguy.bouzeloc@efixo.com>");
789 +MODULE_DESCRIPTION("Broadcom BCM63xx SPI Controller driver");
790 +MODULE_LICENSE("GPL");
791 +MODULE_VERSION(DRV_VER);
792 --- a/drivers/spi/Kconfig
793 +++ b/drivers/spi/Kconfig
794 @@ -74,6 +74,12 @@ config SPI_ATMEL
795 This selects a driver for the Atmel SPI Controller, present on
796 many AT32 (AVR32) and AT91 (ARM) chips.
797
798 +config SPI_BCM63XX
799 + tristate "Broadcom BCM63xx SPI controller"
800 + depends on BCM63XX
801 + help
802 + This is the SPI controller master driver for Broadcom BCM63xx SoC.
803 +
804 config SPI_BFIN
805 tristate "SPI controller driver for ADI Blackfin5xx"
806 depends on BLACKFIN
807 --- a/drivers/spi/Makefile
808 +++ b/drivers/spi/Makefile
809 @@ -14,6 +14,7 @@ obj-$(CONFIG_SPI_ALTERA) += spi-altera.
810 obj-$(CONFIG_SPI_ATMEL) += spi-atmel.o
811 obj-$(CONFIG_SPI_ATH79) += spi-ath79.o
812 obj-$(CONFIG_SPI_AU1550) += spi-au1550.o
813 +obj-$(CONFIG_SPI_BCM63XX) += bcm63xx_spi.o
814 obj-$(CONFIG_SPI_BFIN) += spi-bfin5xx.o
815 obj-$(CONFIG_SPI_BFIN_SPORT) += spi-bfin-sport.o
816 obj-$(CONFIG_SPI_BITBANG) += spi-bitbang.o
817 --- /dev/null
818 +++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_spi.h
819 @@ -0,0 +1,85 @@
820 +#ifndef BCM63XX_DEV_SPI_H
821 +#define BCM63XX_DEV_SPI_H
822 +
823 +#include <linux/types.h>
824 +#include <bcm63xx_io.h>
825 +#include <bcm63xx_regs.h>
826 +
827 +int __init bcm63xx_spi_register(void);
828 +
829 +struct bcm63xx_spi_pdata {
830 + unsigned int fifo_size;
831 + int bus_num;
832 + int num_chipselect;
833 + u32 speed_hz;
834 +};
835 +
836 +enum bcm63xx_regs_spi {
837 + SPI_CMD,
838 + SPI_INT_STATUS,
839 + SPI_INT_MASK_ST,
840 + SPI_INT_MASK,
841 + SPI_ST,
842 + SPI_CLK_CFG,
843 + SPI_FILL_BYTE,
844 + SPI_MSG_TAIL,
845 + SPI_RX_TAIL,
846 + SPI_MSG_CTL,
847 + SPI_MSG_DATA,
848 + SPI_RX_DATA,
849 +};
850 +
851 +#define __GEN_SPI_RSET_BASE(__cpu, __rset) \
852 + case SPI_## __rset: \
853 + return SPI_BCM_## __cpu ##_SPI_## __rset;
854 +
855 +#define __GEN_SPI_RSET(__cpu) \
856 + switch (reg) { \
857 + __GEN_SPI_RSET_BASE(__cpu, CMD) \
858 + __GEN_SPI_RSET_BASE(__cpu, INT_STATUS) \
859 + __GEN_SPI_RSET_BASE(__cpu, INT_MASK_ST) \
860 + __GEN_SPI_RSET_BASE(__cpu, INT_MASK) \
861 + __GEN_SPI_RSET_BASE(__cpu, ST) \
862 + __GEN_SPI_RSET_BASE(__cpu, CLK_CFG) \
863 + __GEN_SPI_RSET_BASE(__cpu, FILL_BYTE) \
864 + __GEN_SPI_RSET_BASE(__cpu, MSG_TAIL) \
865 + __GEN_SPI_RSET_BASE(__cpu, RX_TAIL) \
866 + __GEN_SPI_RSET_BASE(__cpu, MSG_CTL) \
867 + __GEN_SPI_RSET_BASE(__cpu, MSG_DATA) \
868 + __GEN_SPI_RSET_BASE(__cpu, RX_DATA) \
869 + }
870 +
871 +#define __GEN_SPI_REGS_TABLE(__cpu) \
872 + [SPI_CMD] = SPI_BCM_## __cpu ##_SPI_CMD, \
873 + [SPI_INT_STATUS] = SPI_BCM_## __cpu ##_SPI_INT_STATUS, \
874 + [SPI_INT_MASK_ST] = SPI_BCM_## __cpu ##_SPI_INT_MASK_ST, \
875 + [SPI_INT_MASK] = SPI_BCM_## __cpu ##_SPI_INT_MASK, \
876 + [SPI_ST] = SPI_BCM_## __cpu ##_SPI_ST, \
877 + [SPI_CLK_CFG] = SPI_BCM_## __cpu ##_SPI_CLK_CFG, \
878 + [SPI_FILL_BYTE] = SPI_BCM_## __cpu ##_SPI_FILL_BYTE, \
879 + [SPI_MSG_TAIL] = SPI_BCM_## __cpu ##_SPI_MSG_TAIL, \
880 + [SPI_RX_TAIL] = SPI_BCM_## __cpu ##_SPI_RX_TAIL, \
881 + [SPI_MSG_CTL] = SPI_BCM_## __cpu ##_SPI_MSG_CTL, \
882 + [SPI_MSG_DATA] = SPI_BCM_## __cpu ##_SPI_MSG_DATA, \
883 + [SPI_RX_DATA] = SPI_BCM_## __cpu ##_SPI_RX_DATA,
884 +
885 +static inline unsigned long bcm63xx_spireg(enum bcm63xx_regs_spi reg)
886 +{
887 +#ifdef BCMCPU_RUNTIME_DETECT
888 + extern const unsigned long *bcm63xx_regs_spi;
889 + return bcm63xx_regs_spi[reg];
890 +#else
891 +#ifdef CONFIG_BCM63XX_CPU_6338
892 + __GEN_SPI_RSET(6338)
893 +#endif
894 +#ifdef CONFIG_BCM63XX_CPU_6348
895 + __GEN_SPI_RSET(6348)
896 +#endif
897 +#ifdef CONFIG_BCM63XX_CPU_6358
898 + __GEN_SPI_RSET(6358)
899 +#endif
900 +#endif
901 + return 0;
902 +}
903 +
904 +#endif /* BCM63XX_DEV_SPI_H */
905 --- a/arch/mips/bcm63xx/Makefile
906 +++ b/arch/mips/bcm63xx/Makefile
907 @@ -1,6 +1,6 @@
908 obj-y += clk.o cpu.o cs.o gpio.o irq.o prom.o setup.o timer.o \
909 dev-dsp.o dev-enet.o dev-pcmcia.o dev-uart.o dev-wdt.o \
910 - dev-usb-ohci.o dev-usb-ehci.o
911 + dev-usb-ohci.o dev-usb-ehci.o dev-spi.o
912 obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
913
914 obj-y += boards/
915 --- a/arch/mips/bcm63xx/boards/board_bcm963xx.c
916 +++ b/arch/mips/bcm63xx/boards/board_bcm963xx.c
917 @@ -30,6 +30,7 @@
918 #include <bcm63xx_dev_pcmcia.h>
919 #include <bcm63xx_dev_usb_ohci.h>
920 #include <bcm63xx_dev_usb_ehci.h>
921 +#include <bcm63xx_dev_spi.h>
922 #include <board_bcm963xx.h>
923
924 #define PFX "board_bcm963xx: "
925 @@ -928,6 +929,8 @@ int __init board_register_devices(void)
926 if (board.num_spis)
927 spi_register_board_info(board.spis, board.num_spis);
928
929 + bcm63xx_spi_register();
930 +
931 /* read base address of boot chip select (0) */
932 val = bcm_mpi_readl(MPI_CSBASE_REG(0));
933 val &= MPI_CSBASE_BASE_MASK;
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