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authorLinus Torvalds <torvalds@linux-foundation.org>2009-12-14 13:22:11 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-14 13:22:11 -0500
commit478e4e9d7a618379676b17e64583ff3622f2fec5 (patch)
tree1f25c96499abbb0d0b47f75aa92134209fcc4ee8 /drivers/spi
parent2205afa7d13ec716935dfd4b8ff71059ee7aeb0c (diff)
parent965346e3b99e2c5f51bd1325ddd0257227000355 (diff)
Merge branch 'next-spi' of git://git.secretlab.ca/git/linux-2.6
* 'next-spi' of git://git.secretlab.ca/git/linux-2.6: (23 commits) spi: fix probe/remove section markings Add OMAP spi100k driver spi-imx: don't access struct device directly but use dev_get_platdata spi-imx: Add mx25 support spi-imx: use positive logic to distinguish cpu variants spi-imx: correct check for platform_get_irq failing ARM: NUC900: Add spi driver support for nuc900 spi: SuperH MSIOF SPI Master driver V2 spi: fix spidev compilation failure when VERBOSE is defined spi/au1550_spi: fix setupxfer not to override cfg with zeros spi/mpc8xxx: don't use __exit_p to wrap plat_mpc8xxx_spi_remove spi/i.MX: fix broken error handling for gpio_request spi/i.mx: drain MXC SPI transfer buffer when probing device MAINTAINERS: add SPI co-maintainer. spi/xilinx_spi: fix incorrect casting spi/mpc52xx-spi: minor cleanups xilinx_spi: add a platform driver using the xilinx_spi common module. xilinx_spi: add support for the DS570 IP. xilinx_spi: Switch to iomem functions and support little endian. xilinx_spi: Split into of driver and generic part. ...
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/Kconfig40
-rw-r--r--drivers/spi/Makefile5
-rw-r--r--drivers/spi/au1550_spi.c10
-rw-r--r--drivers/spi/mpc52xx_spi.c86
-rw-r--r--drivers/spi/omap_spi_100k.c635
-rw-r--r--drivers/spi/spi_imx.c35
-rw-r--r--drivers/spi/spi_mpc8xxx.c2
-rw-r--r--drivers/spi/spi_nuc900.c504
-rw-r--r--drivers/spi/spi_sh_msiof.c691
-rw-r--r--drivers/spi/spidev.c6
-rw-r--r--drivers/spi/xilinx_spi.c355
-rw-r--r--drivers/spi/xilinx_spi.h32
-rw-r--r--drivers/spi/xilinx_spi_of.c134
-rw-r--r--drivers/spi/xilinx_spi_pltfm.c102
14 files changed, 2418 insertions, 219 deletions
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 28fce65b8594..2d9d70359360 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -169,6 +169,12 @@ config SPI_OMAP24XX
169 SPI master controller for OMAP24xx/OMAP34xx Multichannel SPI 169 SPI master controller for OMAP24xx/OMAP34xx Multichannel SPI
170 (McSPI) modules. 170 (McSPI) modules.
171 171
172config SPI_OMAP_100K
173 tristate "OMAP SPI 100K"
174 depends on SPI_MASTER && (ARCH_OMAP850 || ARCH_OMAP730)
175 help
176 OMAP SPI 100K master controller for omap7xx boards.
177
172config SPI_ORION 178config SPI_ORION
173 tristate "Orion SPI master (EXPERIMENTAL)" 179 tristate "Orion SPI master (EXPERIMENTAL)"
174 depends on PLAT_ORION && EXPERIMENTAL 180 depends on PLAT_ORION && EXPERIMENTAL
@@ -220,6 +226,13 @@ config SPI_S3C24XX_GPIO
220 the inbuilt hardware cannot provide the transfer mode, or 226 the inbuilt hardware cannot provide the transfer mode, or
221 where the board is using non hardware connected pins. 227 where the board is using non hardware connected pins.
222 228
229config SPI_SH_MSIOF
230 tristate "SuperH MSIOF SPI controller"
231 depends on SUPERH && HAVE_CLK
232 select SPI_BITBANG
233 help
234 SPI driver for SuperH MSIOF blocks.
235
223config SPI_SH_SCI 236config SPI_SH_SCI
224 tristate "SuperH SCI SPI controller" 237 tristate "SuperH SCI SPI controller"
225 depends on SUPERH 238 depends on SUPERH
@@ -240,15 +253,38 @@ config SPI_TXX9
240 SPI driver for Toshiba TXx9 MIPS SoCs 253 SPI driver for Toshiba TXx9 MIPS SoCs
241 254
242config SPI_XILINX 255config SPI_XILINX
243 tristate "Xilinx SPI controller" 256 tristate "Xilinx SPI controller common module"
244 depends on (XILINX_VIRTEX || MICROBLAZE) && EXPERIMENTAL 257 depends on HAS_IOMEM && EXPERIMENTAL
245 select SPI_BITBANG 258 select SPI_BITBANG
259 select SPI_XILINX_OF if (XILINX_VIRTEX || MICROBLAZE)
246 help 260 help
247 This exposes the SPI controller IP from the Xilinx EDK. 261 This exposes the SPI controller IP from the Xilinx EDK.
248 262
249 See the "OPB Serial Peripheral Interface (SPI) (v1.00e)" 263 See the "OPB Serial Peripheral Interface (SPI) (v1.00e)"
250 Product Specification document (DS464) for hardware details. 264 Product Specification document (DS464) for hardware details.
251 265
266 Or for the DS570, see "XPS Serial Peripheral Interface (SPI) (v2.00b)"
267
268config SPI_XILINX_OF
269 tristate "Xilinx SPI controller OF device"
270 depends on SPI_XILINX && (XILINX_VIRTEX || MICROBLAZE)
271 help
272 This is the OF driver for the SPI controller IP from the Xilinx EDK.
273
274config SPI_XILINX_PLTFM
275 tristate "Xilinx SPI controller platform device"
276 depends on SPI_XILINX
277 help
278 This is the platform driver for the SPI controller IP
279 from the Xilinx EDK.
280
281config SPI_NUC900
282 tristate "Nuvoton NUC900 series SPI"
283 depends on ARCH_W90X900 && EXPERIMENTAL
284 select SPI_BITBANG
285 help
286 SPI driver for Nuvoton NUC900 series ARM SoCs
287
252# 288#
253# Add new SPI master controllers in alphabetical order above this line 289# Add new SPI master controllers in alphabetical order above this line
254# 290#
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index e3f092a9afa5..ed8c1675b52f 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -22,6 +22,7 @@ obj-$(CONFIG_SPI_LM70_LLP) += spi_lm70llp.o
22obj-$(CONFIG_SPI_PXA2XX) += pxa2xx_spi.o 22obj-$(CONFIG_SPI_PXA2XX) += pxa2xx_spi.o
23obj-$(CONFIG_SPI_OMAP_UWIRE) += omap_uwire.o 23obj-$(CONFIG_SPI_OMAP_UWIRE) += omap_uwire.o
24obj-$(CONFIG_SPI_OMAP24XX) += omap2_mcspi.o 24obj-$(CONFIG_SPI_OMAP24XX) += omap2_mcspi.o
25obj-$(CONFIG_SPI_OMAP_100K) += omap_spi_100k.o
25obj-$(CONFIG_SPI_ORION) += orion_spi.o 26obj-$(CONFIG_SPI_ORION) += orion_spi.o
26obj-$(CONFIG_SPI_PL022) += amba-pl022.o 27obj-$(CONFIG_SPI_PL022) += amba-pl022.o
27obj-$(CONFIG_SPI_MPC52xx_PSC) += mpc52xx_psc_spi.o 28obj-$(CONFIG_SPI_MPC52xx_PSC) += mpc52xx_psc_spi.o
@@ -32,8 +33,12 @@ obj-$(CONFIG_SPI_S3C24XX_GPIO) += spi_s3c24xx_gpio.o
32obj-$(CONFIG_SPI_S3C24XX) += spi_s3c24xx.o 33obj-$(CONFIG_SPI_S3C24XX) += spi_s3c24xx.o
33obj-$(CONFIG_SPI_TXX9) += spi_txx9.o 34obj-$(CONFIG_SPI_TXX9) += spi_txx9.o
34obj-$(CONFIG_SPI_XILINX) += xilinx_spi.o 35obj-$(CONFIG_SPI_XILINX) += xilinx_spi.o
36obj-$(CONFIG_SPI_XILINX_OF) += xilinx_spi_of.o
37obj-$(CONFIG_SPI_XILINX_PLTFM) += xilinx_spi_pltfm.o
35obj-$(CONFIG_SPI_SH_SCI) += spi_sh_sci.o 38obj-$(CONFIG_SPI_SH_SCI) += spi_sh_sci.o
39obj-$(CONFIG_SPI_SH_MSIOF) += spi_sh_msiof.o
36obj-$(CONFIG_SPI_STMP3XXX) += spi_stmp.o 40obj-$(CONFIG_SPI_STMP3XXX) += spi_stmp.o
41obj-$(CONFIG_SPI_NUC900) += spi_nuc900.o
37# ... add above this line ... 42# ... add above this line ...
38 43
39# SPI protocol drivers (device/link on bus) 44# SPI protocol drivers (device/link on bus)
diff --git a/drivers/spi/au1550_spi.c b/drivers/spi/au1550_spi.c
index 76cbc1a66598..cfd5ff9508fa 100644
--- a/drivers/spi/au1550_spi.c
+++ b/drivers/spi/au1550_spi.c
@@ -237,8 +237,14 @@ static int au1550_spi_setupxfer(struct spi_device *spi, struct spi_transfer *t)
237 unsigned bpw, hz; 237 unsigned bpw, hz;
238 u32 cfg, stat; 238 u32 cfg, stat;
239 239
240 bpw = t ? t->bits_per_word : spi->bits_per_word; 240 bpw = spi->bits_per_word;
241 hz = t ? t->speed_hz : spi->max_speed_hz; 241 hz = spi->max_speed_hz;
242 if (t) {
243 if (t->bits_per_word)
244 bpw = t->bits_per_word;
245 if (t->speed_hz)
246 hz = t->speed_hz;
247 }
242 248
243 if (bpw < 4 || bpw > 24) { 249 if (bpw < 4 || bpw > 24) {
244 dev_err(&spi->dev, "setupxfer: invalid bits_per_word=%d\n", 250 dev_err(&spi->dev, "setupxfer: invalid bits_per_word=%d\n",
diff --git a/drivers/spi/mpc52xx_spi.c b/drivers/spi/mpc52xx_spi.c
index ef8379b2c172..45bfe6458173 100644
--- a/drivers/spi/mpc52xx_spi.c
+++ b/drivers/spi/mpc52xx_spi.c
@@ -18,9 +18,9 @@
18#include <linux/interrupt.h> 18#include <linux/interrupt.h>
19#include <linux/delay.h> 19#include <linux/delay.h>
20#include <linux/spi/spi.h> 20#include <linux/spi/spi.h>
21#include <linux/spi/mpc52xx_spi.h>
22#include <linux/of_spi.h> 21#include <linux/of_spi.h>
23#include <linux/io.h> 22#include <linux/io.h>
23#include <linux/of_gpio.h>
24#include <asm/time.h> 24#include <asm/time.h>
25#include <asm/mpc52xx.h> 25#include <asm/mpc52xx.h>
26 26
@@ -53,7 +53,7 @@ MODULE_LICENSE("GPL");
53/* FSM state return values */ 53/* FSM state return values */
54#define FSM_STOP 0 /* Nothing more for the state machine to */ 54#define FSM_STOP 0 /* Nothing more for the state machine to */
55 /* do. If something interesting happens */ 55 /* do. If something interesting happens */
56 /* then and IRQ will be received */ 56 /* then an IRQ will be received */
57#define FSM_POLL 1 /* need to poll for completion, an IRQ is */ 57#define FSM_POLL 1 /* need to poll for completion, an IRQ is */
58 /* not expected */ 58 /* not expected */
59#define FSM_CONTINUE 2 /* Keep iterating the state machine */ 59#define FSM_CONTINUE 2 /* Keep iterating the state machine */
@@ -61,13 +61,12 @@ MODULE_LICENSE("GPL");
61/* Driver internal data */ 61/* Driver internal data */
62struct mpc52xx_spi { 62struct mpc52xx_spi {
63 struct spi_master *master; 63 struct spi_master *master;
64 u32 sysclk;
65 void __iomem *regs; 64 void __iomem *regs;
66 int irq0; /* MODF irq */ 65 int irq0; /* MODF irq */
67 int irq1; /* SPIF irq */ 66 int irq1; /* SPIF irq */
68 int ipb_freq; 67 unsigned int ipb_freq;
69 68
70 /* Statistics */ 69 /* Statistics; not used now, but will be reintroduced for debugfs */
71 int msg_count; 70 int msg_count;
72 int wcol_count; 71 int wcol_count;
73 int wcol_ticks; 72 int wcol_ticks;
@@ -79,7 +78,6 @@ struct mpc52xx_spi {
79 spinlock_t lock; 78 spinlock_t lock;
80 struct work_struct work; 79 struct work_struct work;
81 80
82
83 /* Details of current transfer (length, and buffer pointers) */ 81 /* Details of current transfer (length, and buffer pointers) */
84 struct spi_message *message; /* current message */ 82 struct spi_message *message; /* current message */
85 struct spi_transfer *transfer; /* current transfer */ 83 struct spi_transfer *transfer; /* current transfer */
@@ -89,6 +87,8 @@ struct mpc52xx_spi {
89 u8 *rx_buf; 87 u8 *rx_buf;
90 const u8 *tx_buf; 88 const u8 *tx_buf;
91 int cs_change; 89 int cs_change;
90 int gpio_cs_count;
91 unsigned int *gpio_cs;
92}; 92};
93 93
94/* 94/*
@@ -96,7 +96,13 @@ struct mpc52xx_spi {
96 */ 96 */
97static void mpc52xx_spi_chipsel(struct mpc52xx_spi *ms, int value) 97static void mpc52xx_spi_chipsel(struct mpc52xx_spi *ms, int value)
98{ 98{
99 out_8(ms->regs + SPI_PORTDATA, value ? 0 : 0x08); 99 int cs;
100
101 if (ms->gpio_cs_count > 0) {
102 cs = ms->message->spi->chip_select;
103 gpio_set_value(ms->gpio_cs[cs], value ? 0 : 1);
104 } else
105 out_8(ms->regs + SPI_PORTDATA, value ? 0 : 0x08);
100} 106}
101 107
102/* 108/*
@@ -221,7 +227,7 @@ static int mpc52xx_spi_fsmstate_transfer(int irq, struct mpc52xx_spi *ms,
221 ms->wcol_tx_timestamp = get_tbl(); 227 ms->wcol_tx_timestamp = get_tbl();
222 data = 0; 228 data = 0;
223 if (ms->tx_buf) 229 if (ms->tx_buf)
224 data = *(ms->tx_buf-1); 230 data = *(ms->tx_buf - 1);
225 out_8(ms->regs + SPI_DATA, data); /* try again */ 231 out_8(ms->regs + SPI_DATA, data); /* try again */
226 return FSM_CONTINUE; 232 return FSM_CONTINUE;
227 } else if (status & SPI_STATUS_MODF) { 233 } else if (status & SPI_STATUS_MODF) {
@@ -390,7 +396,9 @@ static int __devinit mpc52xx_spi_probe(struct of_device *op,
390 struct spi_master *master; 396 struct spi_master *master;
391 struct mpc52xx_spi *ms; 397 struct mpc52xx_spi *ms;
392 void __iomem *regs; 398 void __iomem *regs;
393 int rc; 399 u8 ctrl1;
400 int rc, i = 0;
401 int gpio_cs;
394 402
395 /* MMIO registers */ 403 /* MMIO registers */
396 dev_dbg(&op->dev, "probing mpc5200 SPI device\n"); 404 dev_dbg(&op->dev, "probing mpc5200 SPI device\n");
@@ -399,7 +407,8 @@ static int __devinit mpc52xx_spi_probe(struct of_device *op,
399 return -ENODEV; 407 return -ENODEV;
400 408
401 /* initialize the device */ 409 /* initialize the device */
402 out_8(regs+SPI_CTRL1, SPI_CTRL1_SPIE | SPI_CTRL1_SPE | SPI_CTRL1_MSTR); 410 ctrl1 = SPI_CTRL1_SPIE | SPI_CTRL1_SPE | SPI_CTRL1_MSTR;
411 out_8(regs + SPI_CTRL1, ctrl1);
403 out_8(regs + SPI_CTRL2, 0x0); 412 out_8(regs + SPI_CTRL2, 0x0);
404 out_8(regs + SPI_DATADIR, 0xe); /* Set output pins */ 413 out_8(regs + SPI_DATADIR, 0xe); /* Set output pins */
405 out_8(regs + SPI_PORTDATA, 0x8); /* Deassert /SS signal */ 414 out_8(regs + SPI_PORTDATA, 0x8); /* Deassert /SS signal */
@@ -409,6 +418,8 @@ static int __devinit mpc52xx_spi_probe(struct of_device *op,
409 * on the SPI bus. This fault will also occur if the SPI signals 418 * on the SPI bus. This fault will also occur if the SPI signals
410 * are not connected to any pins (port_config setting) */ 419 * are not connected to any pins (port_config setting) */
411 in_8(regs + SPI_STATUS); 420 in_8(regs + SPI_STATUS);
421 out_8(regs + SPI_CTRL1, ctrl1);
422
412 in_8(regs + SPI_DATA); 423 in_8(regs + SPI_DATA);
413 if (in_8(regs + SPI_STATUS) & SPI_STATUS_MODF) { 424 if (in_8(regs + SPI_STATUS) & SPI_STATUS_MODF) {
414 dev_err(&op->dev, "mode fault; is port_config correct?\n"); 425 dev_err(&op->dev, "mode fault; is port_config correct?\n");
@@ -422,10 +433,12 @@ static int __devinit mpc52xx_spi_probe(struct of_device *op,
422 rc = -ENOMEM; 433 rc = -ENOMEM;
423 goto err_alloc; 434 goto err_alloc;
424 } 435 }
436
425 master->bus_num = -1; 437 master->bus_num = -1;
426 master->num_chipselect = 1;
427 master->setup = mpc52xx_spi_setup; 438 master->setup = mpc52xx_spi_setup;
428 master->transfer = mpc52xx_spi_transfer; 439 master->transfer = mpc52xx_spi_transfer;
440 master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST;
441
429 dev_set_drvdata(&op->dev, master); 442 dev_set_drvdata(&op->dev, master);
430 443
431 ms = spi_master_get_devdata(master); 444 ms = spi_master_get_devdata(master);
@@ -435,16 +448,51 @@ static int __devinit mpc52xx_spi_probe(struct of_device *op,
435 ms->irq1 = irq_of_parse_and_map(op->node, 1); 448 ms->irq1 = irq_of_parse_and_map(op->node, 1);
436 ms->state = mpc52xx_spi_fsmstate_idle; 449 ms->state = mpc52xx_spi_fsmstate_idle;
437 ms->ipb_freq = mpc5xxx_get_bus_frequency(op->node); 450 ms->ipb_freq = mpc5xxx_get_bus_frequency(op->node);
451 ms->gpio_cs_count = of_gpio_count(op->node);
452 if (ms->gpio_cs_count > 0) {
453 master->num_chipselect = ms->gpio_cs_count;
454 ms->gpio_cs = kmalloc(ms->gpio_cs_count * sizeof(unsigned int),
455 GFP_KERNEL);
456 if (!ms->gpio_cs) {
457 rc = -ENOMEM;
458 goto err_alloc;
459 }
460
461 for (i = 0; i < ms->gpio_cs_count; i++) {
462 gpio_cs = of_get_gpio(op->node, i);
463 if (gpio_cs < 0) {
464 dev_err(&op->dev,
465 "could not parse the gpio field "
466 "in oftree\n");
467 rc = -ENODEV;
468 goto err_gpio;
469 }
470
471 rc = gpio_request(gpio_cs, dev_name(&op->dev));
472 if (rc) {
473 dev_err(&op->dev,
474 "can't request spi cs gpio #%d "
475 "on gpio line %d\n", i, gpio_cs);
476 goto err_gpio;
477 }
478
479 gpio_direction_output(gpio_cs, 1);
480 ms->gpio_cs[i] = gpio_cs;
481 }
482 } else {
483 master->num_chipselect = 1;
484 }
485
438 spin_lock_init(&ms->lock); 486 spin_lock_init(&ms->lock);
439 INIT_LIST_HEAD(&ms->queue); 487 INIT_LIST_HEAD(&ms->queue);
440 INIT_WORK(&ms->work, mpc52xx_spi_wq); 488 INIT_WORK(&ms->work, mpc52xx_spi_wq);
441 489
442 /* Decide if interrupts can be used */ 490 /* Decide if interrupts can be used */
443 if (ms->irq0 && ms->irq1) { 491 if (ms->irq0 && ms->irq1) {
444 rc = request_irq(ms->irq0, mpc52xx_spi_irq, IRQF_SAMPLE_RANDOM, 492 rc = request_irq(ms->irq0, mpc52xx_spi_irq, 0,
445 "mpc5200-spi-modf", ms); 493 "mpc5200-spi-modf", ms);
446 rc |= request_irq(ms->irq1, mpc52xx_spi_irq, IRQF_SAMPLE_RANDOM, 494 rc |= request_irq(ms->irq1, mpc52xx_spi_irq, 0,
447 "mpc5200-spi-spiF", ms); 495 "mpc5200-spi-spif", ms);
448 if (rc) { 496 if (rc) {
449 free_irq(ms->irq0, ms); 497 free_irq(ms->irq0, ms);
450 free_irq(ms->irq1, ms); 498 free_irq(ms->irq1, ms);
@@ -471,6 +519,11 @@ static int __devinit mpc52xx_spi_probe(struct of_device *op,
471 err_register: 519 err_register:
472 dev_err(&ms->master->dev, "initialization failed\n"); 520 dev_err(&ms->master->dev, "initialization failed\n");
473 spi_master_put(master); 521 spi_master_put(master);
522 err_gpio:
523 while (i-- > 0)
524 gpio_free(ms->gpio_cs[i]);
525
526 kfree(ms->gpio_cs);
474 err_alloc: 527 err_alloc:
475 err_init: 528 err_init:
476 iounmap(regs); 529 iounmap(regs);
@@ -481,10 +534,15 @@ static int __devexit mpc52xx_spi_remove(struct of_device *op)
481{ 534{
482 struct spi_master *master = dev_get_drvdata(&op->dev); 535 struct spi_master *master = dev_get_drvdata(&op->dev);
483 struct mpc52xx_spi *ms = spi_master_get_devdata(master); 536 struct mpc52xx_spi *ms = spi_master_get_devdata(master);
537 int i;
484 538
485 free_irq(ms->irq0, ms); 539 free_irq(ms->irq0, ms);
486 free_irq(ms->irq1, ms); 540 free_irq(ms->irq1, ms);
487 541
542 for (i = 0; i < ms->gpio_cs_count; i++)
543 gpio_free(ms->gpio_cs[i]);
544
545 kfree(ms->gpio_cs);
488 spi_unregister_master(master); 546 spi_unregister_master(master);
489 spi_master_put(master); 547 spi_master_put(master);
490 iounmap(ms->regs); 548 iounmap(ms->regs);
diff --git a/drivers/spi/omap_spi_100k.c b/drivers/spi/omap_spi_100k.c
new file mode 100644
index 000000000000..5355d90d1bee
--- /dev/null
+++ b/drivers/spi/omap_spi_100k.c
@@ -0,0 +1,635 @@
1/*
2 * OMAP7xx SPI 100k controller driver
3 * Author: Fabrice Crohas <fcrohas@gmail.com>
4 * from original omap1_mcspi driver
5 *
6 * Copyright (C) 2005, 2006 Nokia Corporation
7 * Author: Samuel Ortiz <samuel.ortiz@nokia.com> and
8 * Juha Yrj�l� <juha.yrjola@nokia.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 *
24 */
25#include <linux/kernel.h>
26#include <linux/init.h>
27#include <linux/interrupt.h>
28#include <linux/module.h>
29#include <linux/device.h>
30#include <linux/delay.h>
31#include <linux/platform_device.h>
32#include <linux/err.h>
33#include <linux/clk.h>
34#include <linux/io.h>
35#include <linux/gpio.h>
36
37#include <linux/spi/spi.h>
38
39#include <plat/clock.h>
40
41#define OMAP1_SPI100K_MAX_FREQ 48000000
42
43#define ICR_SPITAS (OMAP7XX_ICR_BASE + 0x12)
44
45#define SPI_SETUP1 0x00
46#define SPI_SETUP2 0x02
47#define SPI_CTRL 0x04
48#define SPI_STATUS 0x06
49#define SPI_TX_LSB 0x08
50#define SPI_TX_MSB 0x0a
51#define SPI_RX_LSB 0x0c
52#define SPI_RX_MSB 0x0e
53
54#define SPI_SETUP1_INT_READ_ENABLE (1UL << 5)
55#define SPI_SETUP1_INT_WRITE_ENABLE (1UL << 4)
56#define SPI_SETUP1_CLOCK_DIVISOR(x) ((x) << 1)
57#define SPI_SETUP1_CLOCK_ENABLE (1UL << 0)
58
59#define SPI_SETUP2_ACTIVE_EDGE_FALLING (0UL << 0)
60#define SPI_SETUP2_ACTIVE_EDGE_RISING (1UL << 0)
61#define SPI_SETUP2_NEGATIVE_LEVEL (0UL << 5)
62#define SPI_SETUP2_POSITIVE_LEVEL (1UL << 5)
63#define SPI_SETUP2_LEVEL_TRIGGER (0UL << 10)
64#define SPI_SETUP2_EDGE_TRIGGER (1UL << 10)
65
66#define SPI_CTRL_SEN(x) ((x) << 7)
67#define SPI_CTRL_WORD_SIZE(x) (((x) - 1) << 2)
68#define SPI_CTRL_WR (1UL << 1)
69#define SPI_CTRL_RD (1UL << 0)
70
71#define SPI_STATUS_WE (1UL << 1)
72#define SPI_STATUS_RD (1UL << 0)
73
74#define WRITE 0
75#define READ 1
76
77
78/* use PIO for small transfers, avoiding DMA setup/teardown overhead and
79 * cache operations; better heuristics consider wordsize and bitrate.
80 */
81#define DMA_MIN_BYTES 8
82
83#define SPI_RUNNING 0
84#define SPI_SHUTDOWN 1
85
86struct omap1_spi100k {
87 struct work_struct work;
88
89 /* lock protects queue and registers */
90 spinlock_t lock;
91 struct list_head msg_queue;
92 struct spi_master *master;
93 struct clk *ick;
94 struct clk *fck;
95
96 /* Virtual base address of the controller */
97 void __iomem *base;
98
99 /* State of the SPI */
100 unsigned int state;
101};
102
103struct omap1_spi100k_cs {
104 void __iomem *base;
105 int word_len;
106};
107
108static struct workqueue_struct *omap1_spi100k_wq;
109
110#define MOD_REG_BIT(val, mask, set) do { \
111 if (set) \
112 val |= mask; \
113 else \
114 val &= ~mask; \
115} while (0)
116
117static void spi100k_enable_clock(struct spi_master *master)
118{
119 unsigned int val;
120 struct omap1_spi100k *spi100k = spi_master_get_devdata(master);
121
122 /* enable SPI */
123 val = readw(spi100k->base + SPI_SETUP1);
124 val |= SPI_SETUP1_CLOCK_ENABLE;
125 writew(val, spi100k->base + SPI_SETUP1);
126}
127
128static void spi100k_disable_clock(struct spi_master *master)
129{
130 unsigned int val;
131 struct omap1_spi100k *spi100k = spi_master_get_devdata(master);
132
133 /* disable SPI */
134 val = readw(spi100k->base + SPI_SETUP1);
135 val &= ~SPI_SETUP1_CLOCK_ENABLE;
136 writew(val, spi100k->base + SPI_SETUP1);
137}
138
139static void spi100k_write_data(struct spi_master *master, int len, int data)
140{
141 struct omap1_spi100k *spi100k = spi_master_get_devdata(master);
142
143 /* write 16-bit word */
144 spi100k_enable_clock(master);
145 writew( data , spi100k->base + SPI_TX_MSB);
146
147 writew(SPI_CTRL_SEN(0) |
148 SPI_CTRL_WORD_SIZE(len) |
149 SPI_CTRL_WR,
150 spi100k->base + SPI_CTRL);
151
152 /* Wait for bit ack send change */
153 while((readw(spi100k->base + SPI_STATUS) & SPI_STATUS_WE) != SPI_STATUS_WE);
154 udelay(1000);
155
156 spi100k_disable_clock(master);
157}
158
159static int spi100k_read_data(struct spi_master *master, int len)
160{
161 int dataH,dataL;
162 struct omap1_spi100k *spi100k = spi_master_get_devdata(master);
163
164 spi100k_enable_clock(master);
165 writew(SPI_CTRL_SEN(0) |
166 SPI_CTRL_WORD_SIZE(len) |
167 SPI_CTRL_RD,
168 spi100k->base + SPI_CTRL);
169
170 while((readw(spi100k->base + SPI_STATUS) & SPI_STATUS_RD) != SPI_STATUS_RD);
171 udelay(1000);
172
173 dataL = readw(spi100k->base + SPI_RX_LSB);
174 dataH = readw(spi100k->base + SPI_RX_MSB);
175 spi100k_disable_clock(master);
176
177 return dataL;
178}
179
180static void spi100k_open(struct spi_master *master)
181{
182 /* get control of SPI */
183 struct omap1_spi100k *spi100k = spi_master_get_devdata(master);
184
185 writew(SPI_SETUP1_INT_READ_ENABLE |
186 SPI_SETUP1_INT_WRITE_ENABLE |
187 SPI_SETUP1_CLOCK_DIVISOR(0), spi100k->base + SPI_SETUP1);
188
189 /* configure clock and interrupts */
190 writew(SPI_SETUP2_ACTIVE_EDGE_FALLING |
191 SPI_SETUP2_NEGATIVE_LEVEL |
192 SPI_SETUP2_LEVEL_TRIGGER, spi100k->base + SPI_SETUP2);
193}
194
195static void omap1_spi100k_force_cs(struct omap1_spi100k *spi100k, int enable)
196{
197 if (enable)
198 writew(0x05fc, spi100k->base + SPI_CTRL);
199 else
200 writew(0x05fd, spi100k->base + SPI_CTRL);
201}
202
203static unsigned
204omap1_spi100k_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
205{
206 struct omap1_spi100k *spi100k;
207 struct omap1_spi100k_cs *cs = spi->controller_state;
208 unsigned int count, c;
209 int word_len;
210
211 spi100k = spi_master_get_devdata(spi->master);
212 count = xfer->len;
213 c = count;
214 word_len = cs->word_len;
215
216 /* RX_ONLY mode needs dummy data in TX reg */
217 if (xfer->tx_buf == NULL)
218 spi100k_write_data(spi->master,word_len, 0);
219
220 if (word_len <= 8) {
221 u8 *rx;
222 const u8 *tx;
223
224 rx = xfer->rx_buf;
225 tx = xfer->tx_buf;
226 do {
227 c-=1;
228 if (xfer->tx_buf != NULL)
229 spi100k_write_data(spi->master,word_len, *tx);
230 if (xfer->rx_buf != NULL)
231 *rx = spi100k_read_data(spi->master,word_len);
232 } while(c);
233 } else if (word_len <= 16) {
234 u16 *rx;
235 const u16 *tx;
236
237 rx = xfer->rx_buf;
238 tx = xfer->tx_buf;
239 do {
240 c-=2;
241 if (xfer->tx_buf != NULL)
242 spi100k_write_data(spi->master,word_len, *tx++);
243 if (xfer->rx_buf != NULL)
244 *rx++ = spi100k_read_data(spi->master,word_len);
245 } while(c);
246 } else if (word_len <= 32) {
247 u32 *rx;
248 const u32 *tx;
249
250 rx = xfer->rx_buf;
251 tx = xfer->tx_buf;
252 do {
253 c-=4;
254 if (xfer->tx_buf != NULL)
255 spi100k_write_data(spi->master,word_len, *tx);
256 if (xfer->rx_buf != NULL)
257 *rx = spi100k_read_data(spi->master,word_len);
258 } while(c);
259 }
260 return count - c;
261}
262
263/* called only when no transfer is active to this device */
264static int omap1_spi100k_setup_transfer(struct spi_device *spi,
265 struct spi_transfer *t)
266{
267 struct omap1_spi100k *spi100k = spi_master_get_devdata(spi->master);
268 struct omap1_spi100k_cs *cs = spi->controller_state;
269 u8 word_len = spi->bits_per_word;
270
271 if (t != NULL && t->bits_per_word)
272 word_len = t->bits_per_word;
273 if (!word_len)
274 word_len = 8;
275
276 if (spi->bits_per_word > 32)
277 return -EINVAL;
278 cs->word_len = word_len;
279
280 /* SPI init before transfer */
281 writew(0x3e , spi100k->base + SPI_SETUP1);
282 writew(0x00 , spi100k->base + SPI_STATUS);
283 writew(0x3e , spi100k->base + SPI_CTRL);
284
285 return 0;
286}
287
288/* the spi->mode bits understood by this driver: */
289#define MODEBITS (SPI_CPOL | SPI_CPHA | SPI_CS_HIGH)
290
291static int omap1_spi100k_setup(struct spi_device *spi)
292{
293 int ret;
294 struct omap1_spi100k *spi100k;
295 struct omap1_spi100k_cs *cs = spi->controller_state;
296
297 if (spi->bits_per_word < 4 || spi->bits_per_word > 32) {
298 dev_dbg(&spi->dev, "setup: unsupported %d bit words\n",
299 spi->bits_per_word);
300 return -EINVAL;
301 }
302
303 spi100k = spi_master_get_devdata(spi->master);
304
305 if (!cs) {
306 cs = kzalloc(sizeof *cs, GFP_KERNEL);
307 if (!cs)
308 return -ENOMEM;
309 cs->base = spi100k->base + spi->chip_select * 0x14;
310 spi->controller_state = cs;
311 }
312
313 spi100k_open(spi->master);
314
315 clk_enable(spi100k->ick);
316 clk_enable(spi100k->fck);
317
318 ret = omap1_spi100k_setup_transfer(spi, NULL);
319
320 clk_disable(spi100k->ick);
321 clk_disable(spi100k->fck);
322
323 return ret;
324}
325
326static void omap1_spi100k_work(struct work_struct *work)
327{
328 struct omap1_spi100k *spi100k;
329 int status = 0;
330
331 spi100k = container_of(work, struct omap1_spi100k, work);
332 spin_lock_irq(&spi100k->lock);
333
334 clk_enable(spi100k->ick);
335 clk_enable(spi100k->fck);
336
337 /* We only enable one channel at a time -- the one whose message is
338 * at the head of the queue -- although this controller would gladly
339 * arbitrate among multiple channels. This corresponds to "single
340 * channel" master mode. As a side effect, we need to manage the
341 * chipselect with the FORCE bit ... CS != channel enable.
342 */
343 while (!list_empty(&spi100k->msg_queue)) {
344 struct spi_message *m;
345 struct spi_device *spi;
346 struct spi_transfer *t = NULL;
347 int cs_active = 0;
348 struct omap1_spi100k_cs *cs;
349 int par_override = 0;
350
351 m = container_of(spi100k->msg_queue.next, struct spi_message,
352 queue);
353
354 list_del_init(&m->queue);
355 spin_unlock_irq(&spi100k->lock);
356
357 spi = m->spi;
358 cs = spi->controller_state;
359
360 list_for_each_entry(t, &m->transfers, transfer_list) {
361 if (t->tx_buf == NULL && t->rx_buf == NULL && t->len) {
362 status = -EINVAL;
363 break;
364 }
365 if (par_override || t->speed_hz || t->bits_per_word) {
366 par_override = 1;
367 status = omap1_spi100k_setup_transfer(spi, t);
368 if (status < 0)
369 break;
370 if (!t->speed_hz && !t->bits_per_word)
371 par_override = 0;
372 }
373
374 if (!cs_active) {
375 omap1_spi100k_force_cs(spi100k, 1);
376 cs_active = 1;
377 }
378
379 if (t->len) {
380 unsigned count;
381
382 /* RX_ONLY mode needs dummy data in TX reg */
383 if (t->tx_buf == NULL)
384 spi100k_write_data(spi->master, 8, 0);
385
386 count = omap1_spi100k_txrx_pio(spi, t);
387 m->actual_length += count;
388
389 if (count != t->len) {
390 status = -EIO;
391 break;
392 }
393 }
394
395 if (t->delay_usecs)
396 udelay(t->delay_usecs);
397
398 /* ignore the "leave it on after last xfer" hint */
399
400 if (t->cs_change) {
401 omap1_spi100k_force_cs(spi100k, 0);
402 cs_active = 0;
403 }
404 }
405
406 /* Restore defaults if they were overriden */
407 if (par_override) {
408 par_override = 0;
409 status = omap1_spi100k_setup_transfer(spi, NULL);
410 }
411
412 if (cs_active)
413 omap1_spi100k_force_cs(spi100k, 0);
414
415 m->status = status;
416 m->complete(m->context);
417
418 spin_lock_irq(&spi100k->lock);
419 }
420
421 clk_disable(spi100k->ick);
422 clk_disable(spi100k->fck);
423 spin_unlock_irq(&spi100k->lock);
424
425 if (status < 0)
426 printk(KERN_WARNING "spi transfer failed with %d\n", status);
427}
428
429static int omap1_spi100k_transfer(struct spi_device *spi, struct spi_message *m)
430{
431 struct omap1_spi100k *spi100k;
432 unsigned long flags;
433 struct spi_transfer *t;
434
435 m->actual_length = 0;
436 m->status = -EINPROGRESS;
437
438 spi100k = spi_master_get_devdata(spi->master);
439
440 /* Don't accept new work if we're shutting down */
441 if (spi100k->state == SPI_SHUTDOWN)
442 return -ESHUTDOWN;
443
444 /* reject invalid messages and transfers */
445 if (list_empty(&m->transfers) || !m->complete)
446 return -EINVAL;
447
448 list_for_each_entry(t, &m->transfers, transfer_list) {
449 const void *tx_buf = t->tx_buf;
450 void *rx_buf = t->rx_buf;
451 unsigned len = t->len;
452
453 if (t->speed_hz > OMAP1_SPI100K_MAX_FREQ
454 || (len && !(rx_buf || tx_buf))
455 || (t->bits_per_word &&
456 ( t->bits_per_word < 4
457 || t->bits_per_word > 32))) {
458 dev_dbg(&spi->dev, "transfer: %d Hz, %d %s%s, %d bpw\n",
459 t->speed_hz,
460 len,
461 tx_buf ? "tx" : "",
462 rx_buf ? "rx" : "",
463 t->bits_per_word);
464 return -EINVAL;
465 }
466
467 if (t->speed_hz && t->speed_hz < OMAP1_SPI100K_MAX_FREQ/(1<<16)) {
468 dev_dbg(&spi->dev, "%d Hz max exceeds %d\n",
469 t->speed_hz,
470 OMAP1_SPI100K_MAX_FREQ/(1<<16));
471 return -EINVAL;
472 }
473
474 }
475
476 spin_lock_irqsave(&spi100k->lock, flags);
477 list_add_tail(&m->queue, &spi100k->msg_queue);
478 queue_work(omap1_spi100k_wq, &spi100k->work);
479 spin_unlock_irqrestore(&spi100k->lock, flags);
480
481 return 0;
482}
483
484static int __init omap1_spi100k_reset(struct omap1_spi100k *spi100k)
485{
486 return 0;
487}
488
489static int __devinit omap1_spi100k_probe(struct platform_device *pdev)
490{
491 struct spi_master *master;
492 struct omap1_spi100k *spi100k;
493 int status = 0;
494
495 if (!pdev->id)
496 return -EINVAL;
497
498 master = spi_alloc_master(&pdev->dev, sizeof *spi100k);
499 if (master == NULL) {
500 dev_dbg(&pdev->dev, "master allocation failed\n");
501 return -ENOMEM;
502 }
503
504 if (pdev->id != -1)
505 master->bus_num = pdev->id;
506
507 master->setup = omap1_spi100k_setup;
508 master->transfer = omap1_spi100k_transfer;
509 master->cleanup = NULL;
510 master->num_chipselect = 2;
511 master->mode_bits = MODEBITS;
512
513 dev_set_drvdata(&pdev->dev, master);
514
515 spi100k = spi_master_get_devdata(master);
516 spi100k->master = master;
517
518 /*
519 * The memory region base address is taken as the platform_data.
520 * You should allocate this with ioremap() before initializing
521 * the SPI.
522 */
523 spi100k->base = (void __iomem *) pdev->dev.platform_data;
524
525 INIT_WORK(&spi100k->work, omap1_spi100k_work);
526
527 spin_lock_init(&spi100k->lock);
528 INIT_LIST_HEAD(&spi100k->msg_queue);
529 spi100k->ick = clk_get(&pdev->dev, "ick");
530 if (IS_ERR(spi100k->ick)) {
531 dev_dbg(&pdev->dev, "can't get spi100k_ick\n");
532 status = PTR_ERR(spi100k->ick);
533 goto err1;
534 }
535
536 spi100k->fck = clk_get(&pdev->dev, "fck");
537 if (IS_ERR(spi100k->fck)) {
538 dev_dbg(&pdev->dev, "can't get spi100k_fck\n");
539 status = PTR_ERR(spi100k->fck);
540 goto err2;
541 }
542
543 if (omap1_spi100k_reset(spi100k) < 0)
544 goto err3;
545
546 status = spi_register_master(master);
547 if (status < 0)
548 goto err3;
549
550 spi100k->state = SPI_RUNNING;
551
552 return status;
553
554err3:
555 clk_put(spi100k->fck);
556err2:
557 clk_put(spi100k->ick);
558err1:
559 spi_master_put(master);
560 return status;
561}
562
563static int __exit omap1_spi100k_remove(struct platform_device *pdev)
564{
565 struct spi_master *master;
566 struct omap1_spi100k *spi100k;
567 struct resource *r;
568 unsigned limit = 500;
569 unsigned long flags;
570 int status = 0;
571
572 master = dev_get_drvdata(&pdev->dev);
573 spi100k = spi_master_get_devdata(master);
574
575 spin_lock_irqsave(&spi100k->lock, flags);
576
577 spi100k->state = SPI_SHUTDOWN;
578 while (!list_empty(&spi100k->msg_queue) && limit--) {
579 spin_unlock_irqrestore(&spi100k->lock, flags);
580 msleep(10);
581 spin_lock_irqsave(&spi100k->lock, flags);
582 }
583
584 if (!list_empty(&spi100k->msg_queue))
585 status = -EBUSY;
586
587 spin_unlock_irqrestore(&spi100k->lock, flags);
588
589 if (status != 0)
590 return status;
591
592 clk_put(spi100k->fck);
593 clk_put(spi100k->ick);
594
595 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
596
597 spi_unregister_master(master);
598
599 return 0;
600}
601
602static struct platform_driver omap1_spi100k_driver = {
603 .driver = {
604 .name = "omap1_spi100k",
605 .owner = THIS_MODULE,
606 },
607 .remove = __exit_p(omap1_spi100k_remove),
608};
609
610
611static int __init omap1_spi100k_init(void)
612{
613 omap1_spi100k_wq = create_singlethread_workqueue(
614 omap1_spi100k_driver.driver.name);
615
616 if (omap1_spi100k_wq == NULL)
617 return -1;
618
619 return platform_driver_probe(&omap1_spi100k_driver, omap1_spi100k_probe);
620}
621
622static void __exit omap1_spi100k_exit(void)
623{
624 platform_driver_unregister(&omap1_spi100k_driver);
625
626 destroy_workqueue(omap1_spi100k_wq);
627}
628
629module_init(omap1_spi100k_init);
630module_exit(omap1_spi100k_exit);
631
632MODULE_DESCRIPTION("OMAP7xx SPI 100k controller driver");
633MODULE_AUTHOR("Fabrice Crohas <fcrohas@gmail.com>");
634MODULE_LICENSE("GPL");
635
diff --git a/drivers/spi/spi_imx.c b/drivers/spi/spi_imx.c
index 89c22efedfb0..1893f1e96dc4 100644
--- a/drivers/spi/spi_imx.c
+++ b/drivers/spi/spi_imx.c
@@ -44,6 +44,9 @@
44#define MXC_CSPIINT 0x0c 44#define MXC_CSPIINT 0x0c
45#define MXC_RESET 0x1c 45#define MXC_RESET 0x1c
46 46
47#define MX3_CSPISTAT 0x14
48#define MX3_CSPISTAT_RR (1 << 3)
49
47/* generic defines to abstract from the different register layouts */ 50/* generic defines to abstract from the different register layouts */
48#define MXC_INT_RR (1 << 0) /* Receive data ready interrupt */ 51#define MXC_INT_RR (1 << 0) /* Receive data ready interrupt */
49#define MXC_INT_TE (1 << 1) /* Transmit FIFO empty interrupt */ 52#define MXC_INT_TE (1 << 1) /* Transmit FIFO empty interrupt */
@@ -205,7 +208,7 @@ static int mx31_config(struct spi_imx_data *spi_imx,
205 208
206 if (cpu_is_mx31()) 209 if (cpu_is_mx31())
207 reg |= (config->bpw - 1) << MX31_CSPICTRL_BC_SHIFT; 210 reg |= (config->bpw - 1) << MX31_CSPICTRL_BC_SHIFT;
208 else if (cpu_is_mx35()) { 211 else if (cpu_is_mx25() || cpu_is_mx35()) {
209 reg |= (config->bpw - 1) << MX35_CSPICTRL_BL_SHIFT; 212 reg |= (config->bpw - 1) << MX35_CSPICTRL_BL_SHIFT;
210 reg |= MX31_CSPICTRL_SSCTL; 213 reg |= MX31_CSPICTRL_SSCTL;
211 } 214 }
@@ -219,7 +222,7 @@ static int mx31_config(struct spi_imx_data *spi_imx,
219 if (config->cs < 0) { 222 if (config->cs < 0) {
220 if (cpu_is_mx31()) 223 if (cpu_is_mx31())
221 reg |= (config->cs + 32) << MX31_CSPICTRL_CS_SHIFT; 224 reg |= (config->cs + 32) << MX31_CSPICTRL_CS_SHIFT;
222 else if (cpu_is_mx35()) 225 else if (cpu_is_mx25() || cpu_is_mx35())
223 reg |= (config->cs + 32) << MX35_CSPICTRL_CS_SHIFT; 226 reg |= (config->cs + 32) << MX35_CSPICTRL_CS_SHIFT;
224 } 227 }
225 228
@@ -481,7 +484,7 @@ static void spi_imx_cleanup(struct spi_device *spi)
481{ 484{
482} 485}
483 486
484static int __init spi_imx_probe(struct platform_device *pdev) 487static int __devinit spi_imx_probe(struct platform_device *pdev)
485{ 488{
486 struct spi_imx_master *mxc_platform_info; 489 struct spi_imx_master *mxc_platform_info;
487 struct spi_master *master; 490 struct spi_master *master;
@@ -489,7 +492,7 @@ static int __init spi_imx_probe(struct platform_device *pdev)
489 struct resource *res; 492 struct resource *res;
490 int i, ret; 493 int i, ret;
491 494
492 mxc_platform_info = (struct spi_imx_master *)pdev->dev.platform_data; 495 mxc_platform_info = dev_get_platdata(&pdev->dev);
493 if (!mxc_platform_info) { 496 if (!mxc_platform_info) {
494 dev_err(&pdev->dev, "can't get the platform data\n"); 497 dev_err(&pdev->dev, "can't get the platform data\n");
495 return -EINVAL; 498 return -EINVAL;
@@ -513,11 +516,12 @@ static int __init spi_imx_probe(struct platform_device *pdev)
513 continue; 516 continue;
514 ret = gpio_request(spi_imx->chipselect[i], DRIVER_NAME); 517 ret = gpio_request(spi_imx->chipselect[i], DRIVER_NAME);
515 if (ret) { 518 if (ret) {
516 i--; 519 while (i > 0) {
517 while (i > 0) 520 i--;
518 if (spi_imx->chipselect[i] >= 0) 521 if (spi_imx->chipselect[i] >= 0)
519 gpio_free(spi_imx->chipselect[i--]); 522 gpio_free(spi_imx->chipselect[i]);
520 dev_err(&pdev->dev, "can't get cs gpios"); 523 }
524 dev_err(&pdev->dev, "can't get cs gpios\n");
521 goto out_master_put; 525 goto out_master_put;
522 } 526 }
523 } 527 }
@@ -551,7 +555,7 @@ static int __init spi_imx_probe(struct platform_device *pdev)
551 } 555 }
552 556
553 spi_imx->irq = platform_get_irq(pdev, 0); 557 spi_imx->irq = platform_get_irq(pdev, 0);
554 if (!spi_imx->irq) { 558 if (spi_imx->irq <= 0) {
555 ret = -EINVAL; 559 ret = -EINVAL;
556 goto out_iounmap; 560 goto out_iounmap;
557 } 561 }
@@ -562,7 +566,7 @@ static int __init spi_imx_probe(struct platform_device *pdev)
562 goto out_iounmap; 566 goto out_iounmap;
563 } 567 }
564 568
565 if (cpu_is_mx31() || cpu_is_mx35()) { 569 if (cpu_is_mx25() || cpu_is_mx31() || cpu_is_mx35()) {
566 spi_imx->intctrl = mx31_intctrl; 570 spi_imx->intctrl = mx31_intctrl;
567 spi_imx->config = mx31_config; 571 spi_imx->config = mx31_config;
568 spi_imx->trigger = mx31_trigger; 572 spi_imx->trigger = mx31_trigger;
@@ -590,9 +594,14 @@ static int __init spi_imx_probe(struct platform_device *pdev)
590 clk_enable(spi_imx->clk); 594 clk_enable(spi_imx->clk);
591 spi_imx->spi_clk = clk_get_rate(spi_imx->clk); 595 spi_imx->spi_clk = clk_get_rate(spi_imx->clk);
592 596
593 if (!cpu_is_mx31() || !cpu_is_mx35()) 597 if (cpu_is_mx1() || cpu_is_mx21() || cpu_is_mx27())
594 writel(1, spi_imx->base + MXC_RESET); 598 writel(1, spi_imx->base + MXC_RESET);
595 599
600 /* drain receive buffer */
601 if (cpu_is_mx25() || cpu_is_mx31() || cpu_is_mx35())
602 while (readl(spi_imx->base + MX3_CSPISTAT) & MX3_CSPISTAT_RR)
603 readl(spi_imx->base + MXC_CSPIRXDATA);
604
596 spi_imx->intctrl(spi_imx, 0); 605 spi_imx->intctrl(spi_imx, 0);
597 606
598 ret = spi_bitbang_start(&spi_imx->bitbang); 607 ret = spi_bitbang_start(&spi_imx->bitbang);
@@ -625,7 +634,7 @@ out_master_put:
625 return ret; 634 return ret;
626} 635}
627 636
628static int __exit spi_imx_remove(struct platform_device *pdev) 637static int __devexit spi_imx_remove(struct platform_device *pdev)
629{ 638{
630 struct spi_master *master = platform_get_drvdata(pdev); 639 struct spi_master *master = platform_get_drvdata(pdev);
631 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 640 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -659,7 +668,7 @@ static struct platform_driver spi_imx_driver = {
659 .owner = THIS_MODULE, 668 .owner = THIS_MODULE,
660 }, 669 },
661 .probe = spi_imx_probe, 670 .probe = spi_imx_probe,
662 .remove = __exit_p(spi_imx_remove), 671 .remove = __devexit_p(spi_imx_remove),
663}; 672};
664 673
665static int __init spi_imx_init(void) 674static int __init spi_imx_init(void)
diff --git a/drivers/spi/spi_mpc8xxx.c b/drivers/spi/spi_mpc8xxx.c
index 930135dc73ba..e9390d747bfc 100644
--- a/drivers/spi/spi_mpc8xxx.c
+++ b/drivers/spi/spi_mpc8xxx.c
@@ -1356,7 +1356,7 @@ static int __devexit plat_mpc8xxx_spi_remove(struct platform_device *pdev)
1356MODULE_ALIAS("platform:mpc8xxx_spi"); 1356MODULE_ALIAS("platform:mpc8xxx_spi");
1357static struct platform_driver mpc8xxx_spi_driver = { 1357static struct platform_driver mpc8xxx_spi_driver = {
1358 .probe = plat_mpc8xxx_spi_probe, 1358 .probe = plat_mpc8xxx_spi_probe,
1359 .remove = __exit_p(plat_mpc8xxx_spi_remove), 1359 .remove = __devexit_p(plat_mpc8xxx_spi_remove),
1360 .driver = { 1360 .driver = {
1361 .name = "mpc8xxx_spi", 1361 .name = "mpc8xxx_spi",
1362 .owner = THIS_MODULE, 1362 .owner = THIS_MODULE,
diff --git a/drivers/spi/spi_nuc900.c b/drivers/spi/spi_nuc900.c
new file mode 100644
index 000000000000..b319f9bf9b9b
--- /dev/null
+++ b/drivers/spi/spi_nuc900.c
@@ -0,0 +1,504 @@
1/* linux/drivers/spi/spi_nuc900.c
2 *
3 * Copyright (c) 2009 Nuvoton technology.
4 * Wan ZongShun <mcuos.com@gmail.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10*/
11
12#include <linux/init.h>
13#include <linux/spinlock.h>
14#include <linux/workqueue.h>
15#include <linux/interrupt.h>
16#include <linux/delay.h>
17#include <linux/errno.h>
18#include <linux/err.h>
19#include <linux/clk.h>
20#include <linux/device.h>
21#include <linux/platform_device.h>
22#include <linux/gpio.h>
23#include <linux/io.h>
24
25#include <linux/spi/spi.h>
26#include <linux/spi/spi_bitbang.h>
27
28#include <mach/nuc900_spi.h>
29
30/* usi registers offset */
31#define USI_CNT 0x00
32#define USI_DIV 0x04
33#define USI_SSR 0x08
34#define USI_RX0 0x10
35#define USI_TX0 0x10
36
37/* usi register bit */
38#define ENINT (0x01 << 17)
39#define ENFLG (0x01 << 16)
40#define TXNUM (0x03 << 8)
41#define TXNEG (0x01 << 2)
42#define RXNEG (0x01 << 1)
43#define LSB (0x01 << 10)
44#define SELECTLEV (0x01 << 2)
45#define SELECTPOL (0x01 << 31)
46#define SELECTSLAVE 0x01
47#define GOBUSY 0x01
48
49struct nuc900_spi {
50 struct spi_bitbang bitbang;
51 struct completion done;
52 void __iomem *regs;
53 int irq;
54 int len;
55 int count;
56 const unsigned char *tx;
57 unsigned char *rx;
58 struct clk *clk;
59 struct resource *ioarea;
60 struct spi_master *master;
61 struct spi_device *curdev;
62 struct device *dev;
63 struct nuc900_spi_info *pdata;
64 spinlock_t lock;
65 struct resource *res;
66};
67
68static inline struct nuc900_spi *to_hw(struct spi_device *sdev)
69{
70 return spi_master_get_devdata(sdev->master);
71}
72
73static void nuc900_slave_select(struct spi_device *spi, unsigned int ssr)
74{
75 struct nuc900_spi *hw = to_hw(spi);
76 unsigned int val;
77 unsigned int cs = spi->mode & SPI_CS_HIGH ? 1 : 0;
78 unsigned int cpol = spi->mode & SPI_CPOL ? 1 : 0;
79 unsigned long flags;
80
81 spin_lock_irqsave(&hw->lock, flags);
82
83 val = __raw_readl(hw->regs + USI_SSR);
84
85 if (!cs)
86 val &= ~SELECTLEV;
87 else
88 val |= SELECTLEV;
89
90 if (!ssr)
91 val &= ~SELECTSLAVE;
92 else
93 val |= SELECTSLAVE;
94
95 __raw_writel(val, hw->regs + USI_SSR);
96
97 val = __raw_readl(hw->regs + USI_CNT);
98
99 if (!cpol)
100 val &= ~SELECTPOL;
101 else
102 val |= SELECTPOL;
103
104 __raw_writel(val, hw->regs + USI_CNT);
105
106 spin_unlock_irqrestore(&hw->lock, flags);
107}
108
109static void nuc900_spi_chipsel(struct spi_device *spi, int value)
110{
111 switch (value) {
112 case BITBANG_CS_INACTIVE:
113 nuc900_slave_select(spi, 0);
114 break;
115
116 case BITBANG_CS_ACTIVE:
117 nuc900_slave_select(spi, 1);
118 break;
119 }
120}
121
122static void nuc900_spi_setup_txnum(struct nuc900_spi *hw,
123 unsigned int txnum)
124{
125 unsigned int val;
126 unsigned long flags;
127
128 spin_lock_irqsave(&hw->lock, flags);
129
130 val = __raw_readl(hw->regs + USI_CNT);
131
132 if (!txnum)
133 val &= ~TXNUM;
134 else
135 val |= txnum << 0x08;
136
137 __raw_writel(val, hw->regs + USI_CNT);
138
139 spin_unlock_irqrestore(&hw->lock, flags);
140
141}
142
143static void nuc900_spi_setup_txbitlen(struct nuc900_spi *hw,
144 unsigned int txbitlen)
145{
146 unsigned int val;
147 unsigned long flags;
148
149 spin_lock_irqsave(&hw->lock, flags);
150
151 val = __raw_readl(hw->regs + USI_CNT);
152
153 val |= (txbitlen << 0x03);
154
155 __raw_writel(val, hw->regs + USI_CNT);
156
157 spin_unlock_irqrestore(&hw->lock, flags);
158}
159
160static void nuc900_spi_gobusy(struct nuc900_spi *hw)
161{
162 unsigned int val;
163 unsigned long flags;
164
165 spin_lock_irqsave(&hw->lock, flags);
166
167 val = __raw_readl(hw->regs + USI_CNT);
168
169 val |= GOBUSY;
170
171 __raw_writel(val, hw->regs + USI_CNT);
172
173 spin_unlock_irqrestore(&hw->lock, flags);
174}
175
176static int nuc900_spi_setupxfer(struct spi_device *spi,
177 struct spi_transfer *t)
178{
179 return 0;
180}
181
182static int nuc900_spi_setup(struct spi_device *spi)
183{
184 return 0;
185}
186
187static inline unsigned int hw_txbyte(struct nuc900_spi *hw, int count)
188{
189 return hw->tx ? hw->tx[count] : 0;
190}
191
192static int nuc900_spi_txrx(struct spi_device *spi, struct spi_transfer *t)
193{
194 struct nuc900_spi *hw = to_hw(spi);
195
196 hw->tx = t->tx_buf;
197 hw->rx = t->rx_buf;
198 hw->len = t->len;
199 hw->count = 0;
200
201 __raw_writel(hw_txbyte(hw, 0x0), hw->regs + USI_TX0);
202
203 nuc900_spi_gobusy(hw);
204
205 wait_for_completion(&hw->done);
206
207 return hw->count;
208}
209
210static irqreturn_t nuc900_spi_irq(int irq, void *dev)
211{
212 struct nuc900_spi *hw = dev;
213 unsigned int status;
214 unsigned int count = hw->count;
215
216 status = __raw_readl(hw->regs + USI_CNT);
217 __raw_writel(status, hw->regs + USI_CNT);
218
219 if (status & ENFLG) {
220 hw->count++;
221
222 if (hw->rx)
223 hw->rx[count] = __raw_readl(hw->regs + USI_RX0);
224 count++;
225
226 if (count < hw->len) {
227 __raw_writel(hw_txbyte(hw, count), hw->regs + USI_TX0);
228 nuc900_spi_gobusy(hw);
229 } else {
230 complete(&hw->done);
231 }
232
233 return IRQ_HANDLED;
234 }
235
236 complete(&hw->done);
237 return IRQ_HANDLED;
238}
239
240static void nuc900_tx_edge(struct nuc900_spi *hw, unsigned int edge)
241{
242 unsigned int val;
243 unsigned long flags;
244
245 spin_lock_irqsave(&hw->lock, flags);
246
247 val = __raw_readl(hw->regs + USI_CNT);
248
249 if (edge)
250 val |= TXNEG;
251 else
252 val &= ~TXNEG;
253 __raw_writel(val, hw->regs + USI_CNT);
254
255 spin_unlock_irqrestore(&hw->lock, flags);
256}
257
258static void nuc900_rx_edge(struct nuc900_spi *hw, unsigned int edge)
259{
260 unsigned int val;
261 unsigned long flags;
262
263 spin_lock_irqsave(&hw->lock, flags);
264
265 val = __raw_readl(hw->regs + USI_CNT);
266
267 if (edge)
268 val |= RXNEG;
269 else
270 val &= ~RXNEG;
271 __raw_writel(val, hw->regs + USI_CNT);
272
273 spin_unlock_irqrestore(&hw->lock, flags);
274}
275
276static void nuc900_send_first(struct nuc900_spi *hw, unsigned int lsb)
277{
278 unsigned int val;
279 unsigned long flags;
280
281 spin_lock_irqsave(&hw->lock, flags);
282
283 val = __raw_readl(hw->regs + USI_CNT);
284
285 if (lsb)
286 val |= LSB;
287 else
288 val &= ~LSB;
289 __raw_writel(val, hw->regs + USI_CNT);
290
291 spin_unlock_irqrestore(&hw->lock, flags);
292}
293
294static void nuc900_set_sleep(struct nuc900_spi *hw, unsigned int sleep)
295{
296 unsigned int val;
297 unsigned long flags;
298
299 spin_lock_irqsave(&hw->lock, flags);
300
301 val = __raw_readl(hw->regs + USI_CNT);
302
303 if (sleep)
304 val |= (sleep << 12);
305 else
306 val &= ~(0x0f << 12);
307 __raw_writel(val, hw->regs + USI_CNT);
308
309 spin_unlock_irqrestore(&hw->lock, flags);
310}
311
312static void nuc900_enable_int(struct nuc900_spi *hw)
313{
314 unsigned int val;
315 unsigned long flags;
316
317 spin_lock_irqsave(&hw->lock, flags);
318
319 val = __raw_readl(hw->regs + USI_CNT);
320
321 val |= ENINT;
322
323 __raw_writel(val, hw->regs + USI_CNT);
324
325 spin_unlock_irqrestore(&hw->lock, flags);
326}
327
328static void nuc900_set_divider(struct nuc900_spi *hw)
329{
330 __raw_writel(hw->pdata->divider, hw->regs + USI_DIV);
331}
332
333static void nuc900_init_spi(struct nuc900_spi *hw)
334{
335 clk_enable(hw->clk);
336 spin_lock_init(&hw->lock);
337
338 nuc900_tx_edge(hw, hw->pdata->txneg);
339 nuc900_rx_edge(hw, hw->pdata->rxneg);
340 nuc900_send_first(hw, hw->pdata->lsb);
341 nuc900_set_sleep(hw, hw->pdata->sleep);
342 nuc900_spi_setup_txbitlen(hw, hw->pdata->txbitlen);
343 nuc900_spi_setup_txnum(hw, hw->pdata->txnum);
344 nuc900_set_divider(hw);
345 nuc900_enable_int(hw);
346}
347
348static int __devinit nuc900_spi_probe(struct platform_device *pdev)
349{
350 struct nuc900_spi *hw;
351 struct spi_master *master;
352 int err = 0;
353
354 master = spi_alloc_master(&pdev->dev, sizeof(struct nuc900_spi));
355 if (master == NULL) {
356 dev_err(&pdev->dev, "No memory for spi_master\n");
357 err = -ENOMEM;
358 goto err_nomem;
359 }
360
361 hw = spi_master_get_devdata(master);
362 memset(hw, 0, sizeof(struct nuc900_spi));
363
364 hw->master = spi_master_get(master);
365 hw->pdata = pdev->dev.platform_data;
366 hw->dev = &pdev->dev;
367
368 if (hw->pdata == NULL) {
369 dev_err(&pdev->dev, "No platform data supplied\n");
370 err = -ENOENT;
371 goto err_pdata;
372 }
373
374 platform_set_drvdata(pdev, hw);
375 init_completion(&hw->done);
376
377 master->mode_bits = SPI_MODE_0;
378 master->num_chipselect = hw->pdata->num_cs;
379 master->bus_num = hw->pdata->bus_num;
380 hw->bitbang.master = hw->master;
381 hw->bitbang.setup_transfer = nuc900_spi_setupxfer;
382 hw->bitbang.chipselect = nuc900_spi_chipsel;
383 hw->bitbang.txrx_bufs = nuc900_spi_txrx;
384 hw->bitbang.master->setup = nuc900_spi_setup;
385
386 hw->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
387 if (hw->res == NULL) {
388 dev_err(&pdev->dev, "Cannot get IORESOURCE_MEM\n");
389 err = -ENOENT;
390 goto err_pdata;
391 }
392
393 hw->ioarea = request_mem_region(hw->res->start,
394 resource_size(hw->res), pdev->name);
395
396 if (hw->ioarea == NULL) {
397 dev_err(&pdev->dev, "Cannot reserve region\n");
398 err = -ENXIO;
399 goto err_pdata;
400 }
401
402 hw->regs = ioremap(hw->res->start, resource_size(hw->res));
403 if (hw->regs == NULL) {
404 dev_err(&pdev->dev, "Cannot map IO\n");
405 err = -ENXIO;
406 goto err_iomap;
407 }
408
409 hw->irq = platform_get_irq(pdev, 0);
410 if (hw->irq < 0) {
411 dev_err(&pdev->dev, "No IRQ specified\n");
412 err = -ENOENT;
413 goto err_irq;
414 }
415
416 err = request_irq(hw->irq, nuc900_spi_irq, 0, pdev->name, hw);
417 if (err) {
418 dev_err(&pdev->dev, "Cannot claim IRQ\n");
419 goto err_irq;
420 }
421
422 hw->clk = clk_get(&pdev->dev, "spi");
423 if (IS_ERR(hw->clk)) {
424 dev_err(&pdev->dev, "No clock for device\n");
425 err = PTR_ERR(hw->clk);
426 goto err_clk;
427 }
428
429 mfp_set_groupg(&pdev->dev);
430 nuc900_init_spi(hw);
431
432 err = spi_bitbang_start(&hw->bitbang);
433 if (err) {
434 dev_err(&pdev->dev, "Failed to register SPI master\n");
435 goto err_register;
436 }
437
438 return 0;
439
440err_register:
441 clk_disable(hw->clk);
442 clk_put(hw->clk);
443err_clk:
444 free_irq(hw->irq, hw);
445err_irq:
446 iounmap(hw->regs);
447err_iomap:
448 release_mem_region(hw->res->start, resource_size(hw->res));
449 kfree(hw->ioarea);
450err_pdata:
451 spi_master_put(hw->master);;
452
453err_nomem:
454 return err;
455}
456
457static int __devexit nuc900_spi_remove(struct platform_device *dev)
458{
459 struct nuc900_spi *hw = platform_get_drvdata(dev);
460
461 free_irq(hw->irq, hw);
462
463 platform_set_drvdata(dev, NULL);
464
465 spi_unregister_master(hw->master);
466
467 clk_disable(hw->clk);
468 clk_put(hw->clk);
469
470 iounmap(hw->regs);
471
472 release_mem_region(hw->res->start, resource_size(hw->res));
473 kfree(hw->ioarea);
474
475 spi_master_put(hw->master);
476 return 0;
477}
478
479static struct platform_driver nuc900_spi_driver = {
480 .probe = nuc900_spi_probe,
481 .remove = __devexit_p(nuc900_spi_remove),
482 .driver = {
483 .name = "nuc900-spi",
484 .owner = THIS_MODULE,
485 },
486};
487
488static int __init nuc900_spi_init(void)
489{
490 return platform_driver_register(&nuc900_spi_driver);
491}
492
493static void __exit nuc900_spi_exit(void)
494{
495 platform_driver_unregister(&nuc900_spi_driver);
496}
497
498module_init(nuc900_spi_init);
499module_exit(nuc900_spi_exit);
500
501MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
502MODULE_DESCRIPTION("nuc900 spi driver!");
503MODULE_LICENSE("GPL");
504MODULE_ALIAS("platform:nuc900-spi");
diff --git a/drivers/spi/spi_sh_msiof.c b/drivers/spi/spi_sh_msiof.c
new file mode 100644
index 000000000000..51e5e1dfa6e5
--- /dev/null
+++ b/drivers/spi/spi_sh_msiof.c
@@ -0,0 +1,691 @@
1/*
2 * SuperH MSIOF SPI Master Interface
3 *
4 * Copyright (c) 2009 Magnus Damm
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 */
11
12#include <linux/kernel.h>
13#include <linux/init.h>
14#include <linux/delay.h>
15#include <linux/interrupt.h>
16#include <linux/platform_device.h>
17#include <linux/completion.h>
18#include <linux/pm_runtime.h>
19#include <linux/gpio.h>
20#include <linux/bitmap.h>
21#include <linux/clk.h>
22#include <linux/io.h>
23
24#include <linux/spi/spi.h>
25#include <linux/spi/spi_bitbang.h>
26#include <linux/spi/sh_msiof.h>
27
28#include <asm/spi.h>
29#include <asm/unaligned.h>
30
31struct sh_msiof_spi_priv {
32 struct spi_bitbang bitbang; /* must be first for spi_bitbang.c */
33 void __iomem *mapbase;
34 struct clk *clk;
35 struct platform_device *pdev;
36 struct sh_msiof_spi_info *info;
37 struct completion done;
38 unsigned long flags;
39 int tx_fifo_size;
40 int rx_fifo_size;
41};
42
43#define TMDR1 0x00
44#define TMDR2 0x04
45#define TMDR3 0x08
46#define RMDR1 0x10
47#define RMDR2 0x14
48#define RMDR3 0x18
49#define TSCR 0x20
50#define RSCR 0x22
51#define CTR 0x28
52#define FCTR 0x30
53#define STR 0x40
54#define IER 0x44
55#define TDR1 0x48
56#define TDR2 0x4c
57#define TFDR 0x50
58#define RDR1 0x58
59#define RDR2 0x5c
60#define RFDR 0x60
61
62#define CTR_TSCKE (1 << 15)
63#define CTR_TFSE (1 << 14)
64#define CTR_TXE (1 << 9)
65#define CTR_RXE (1 << 8)
66
67#define STR_TEOF (1 << 23)
68#define STR_REOF (1 << 7)
69
70static unsigned long sh_msiof_read(struct sh_msiof_spi_priv *p, int reg_offs)
71{
72 switch (reg_offs) {
73 case TSCR:
74 case RSCR:
75 return ioread16(p->mapbase + reg_offs);
76 default:
77 return ioread32(p->mapbase + reg_offs);
78 }
79}
80
81static void sh_msiof_write(struct sh_msiof_spi_priv *p, int reg_offs,
82 unsigned long value)
83{
84 switch (reg_offs) {
85 case TSCR:
86 case RSCR:
87 iowrite16(value, p->mapbase + reg_offs);
88 break;
89 default:
90 iowrite32(value, p->mapbase + reg_offs);
91 break;
92 }
93}
94
95static int sh_msiof_modify_ctr_wait(struct sh_msiof_spi_priv *p,
96 unsigned long clr, unsigned long set)
97{
98 unsigned long mask = clr | set;
99 unsigned long data;
100 int k;
101
102 data = sh_msiof_read(p, CTR);
103 data &= ~clr;
104 data |= set;
105 sh_msiof_write(p, CTR, data);
106
107 for (k = 100; k > 0; k--) {
108 if ((sh_msiof_read(p, CTR) & mask) == set)
109 break;
110
111 udelay(10);
112 }
113
114 return k > 0 ? 0 : -ETIMEDOUT;
115}
116
117static irqreturn_t sh_msiof_spi_irq(int irq, void *data)
118{
119 struct sh_msiof_spi_priv *p = data;
120
121 /* just disable the interrupt and wake up */
122 sh_msiof_write(p, IER, 0);
123 complete(&p->done);
124
125 return IRQ_HANDLED;
126}
127
128static struct {
129 unsigned short div;
130 unsigned short scr;
131} const sh_msiof_spi_clk_table[] = {
132 { 1, 0x0007 },
133 { 2, 0x0000 },
134 { 4, 0x0001 },
135 { 8, 0x0002 },
136 { 16, 0x0003 },
137 { 32, 0x0004 },
138 { 64, 0x1f00 },
139 { 128, 0x1f01 },
140 { 256, 0x1f02 },
141 { 512, 0x1f03 },
142 { 1024, 0x1f04 },
143};
144
145static void sh_msiof_spi_set_clk_regs(struct sh_msiof_spi_priv *p,
146 unsigned long parent_rate,
147 unsigned long spi_hz)
148{
149 unsigned long div = 1024;
150 size_t k;
151
152 if (!WARN_ON(!spi_hz || !parent_rate))
153 div = parent_rate / spi_hz;
154
155 /* TODO: make more fine grained */
156
157 for (k = 0; k < ARRAY_SIZE(sh_msiof_spi_clk_table); k++) {
158 if (sh_msiof_spi_clk_table[k].div >= div)
159 break;
160 }
161
162 k = min_t(int, k, ARRAY_SIZE(sh_msiof_spi_clk_table) - 1);
163
164 sh_msiof_write(p, TSCR, sh_msiof_spi_clk_table[k].scr);
165 sh_msiof_write(p, RSCR, sh_msiof_spi_clk_table[k].scr);
166}
167
168static void sh_msiof_spi_set_pin_regs(struct sh_msiof_spi_priv *p,
169 int cpol, int cpha,
170 int tx_hi_z, int lsb_first)
171{
172 unsigned long tmp;
173 int edge;
174
175 /*
176 * CPOL CPHA TSCKIZ RSCKIZ TEDG REDG(!)
177 * 0 0 10 10 1 0
178 * 0 1 10 10 0 1
179 * 1 0 11 11 0 1
180 * 1 1 11 11 1 0
181 *
182 * (!) Note: REDG is inverted recommended data sheet setting
183 */
184
185 sh_msiof_write(p, FCTR, 0);
186 sh_msiof_write(p, TMDR1, 0xe2000005 | (lsb_first << 24));
187 sh_msiof_write(p, RMDR1, 0x22000005 | (lsb_first << 24));
188
189 tmp = 0xa0000000;
190 tmp |= cpol << 30; /* TSCKIZ */
191 tmp |= cpol << 28; /* RSCKIZ */
192
193 edge = cpol ? cpha : !cpha;
194
195 tmp |= edge << 27; /* TEDG */
196 tmp |= !edge << 26; /* REDG */
197 tmp |= (tx_hi_z ? 2 : 0) << 22; /* TXDIZ */
198 sh_msiof_write(p, CTR, tmp);
199}
200
201static void sh_msiof_spi_set_mode_regs(struct sh_msiof_spi_priv *p,
202 const void *tx_buf, void *rx_buf,
203 int bits, int words)
204{
205 unsigned long dr2;
206
207 dr2 = ((bits - 1) << 24) | ((words - 1) << 16);
208
209 if (tx_buf)
210 sh_msiof_write(p, TMDR2, dr2);
211 else
212 sh_msiof_write(p, TMDR2, dr2 | 1);
213
214 if (rx_buf)
215 sh_msiof_write(p, RMDR2, dr2);
216
217 sh_msiof_write(p, IER, STR_TEOF | STR_REOF);
218}
219
220static void sh_msiof_reset_str(struct sh_msiof_spi_priv *p)
221{
222 sh_msiof_write(p, STR, sh_msiof_read(p, STR));
223}
224
225static void sh_msiof_spi_write_fifo_8(struct sh_msiof_spi_priv *p,
226 const void *tx_buf, int words, int fs)
227{
228 const unsigned char *buf_8 = tx_buf;
229 int k;
230
231 for (k = 0; k < words; k++)
232 sh_msiof_write(p, TFDR, buf_8[k] << fs);
233}
234
235static void sh_msiof_spi_write_fifo_16(struct sh_msiof_spi_priv *p,
236 const void *tx_buf, int words, int fs)
237{
238 const unsigned short *buf_16 = tx_buf;
239 int k;
240
241 for (k = 0; k < words; k++)
242 sh_msiof_write(p, TFDR, buf_16[k] << fs);
243}
244
245static void sh_msiof_spi_write_fifo_16u(struct sh_msiof_spi_priv *p,
246 const void *tx_buf, int words, int fs)
247{
248 const unsigned short *buf_16 = tx_buf;
249 int k;
250
251 for (k = 0; k < words; k++)
252 sh_msiof_write(p, TFDR, get_unaligned(&buf_16[k]) << fs);
253}
254
255static void sh_msiof_spi_write_fifo_32(struct sh_msiof_spi_priv *p,
256 const void *tx_buf, int words, int fs)
257{
258 const unsigned int *buf_32 = tx_buf;
259 int k;
260
261 for (k = 0; k < words; k++)
262 sh_msiof_write(p, TFDR, buf_32[k] << fs);
263}
264
265static void sh_msiof_spi_write_fifo_32u(struct sh_msiof_spi_priv *p,
266 const void *tx_buf, int words, int fs)
267{
268 const unsigned int *buf_32 = tx_buf;
269 int k;
270
271 for (k = 0; k < words; k++)
272 sh_msiof_write(p, TFDR, get_unaligned(&buf_32[k]) << fs);
273}
274
275static void sh_msiof_spi_read_fifo_8(struct sh_msiof_spi_priv *p,
276 void *rx_buf, int words, int fs)
277{
278 unsigned char *buf_8 = rx_buf;
279 int k;
280
281 for (k = 0; k < words; k++)
282 buf_8[k] = sh_msiof_read(p, RFDR) >> fs;
283}
284
285static void sh_msiof_spi_read_fifo_16(struct sh_msiof_spi_priv *p,
286 void *rx_buf, int words, int fs)
287{
288 unsigned short *buf_16 = rx_buf;
289 int k;
290
291 for (k = 0; k < words; k++)
292 buf_16[k] = sh_msiof_read(p, RFDR) >> fs;
293}
294
295static void sh_msiof_spi_read_fifo_16u(struct sh_msiof_spi_priv *p,
296 void *rx_buf, int words, int fs)
297{
298 unsigned short *buf_16 = rx_buf;
299 int k;
300
301 for (k = 0; k < words; k++)
302 put_unaligned(sh_msiof_read(p, RFDR) >> fs, &buf_16[k]);
303}
304
305static void sh_msiof_spi_read_fifo_32(struct sh_msiof_spi_priv *p,
306 void *rx_buf, int words, int fs)
307{
308 unsigned int *buf_32 = rx_buf;
309 int k;
310
311 for (k = 0; k < words; k++)
312 buf_32[k] = sh_msiof_read(p, RFDR) >> fs;
313}
314
315static void sh_msiof_spi_read_fifo_32u(struct sh_msiof_spi_priv *p,
316 void *rx_buf, int words, int fs)
317{
318 unsigned int *buf_32 = rx_buf;
319 int k;
320
321 for (k = 0; k < words; k++)
322 put_unaligned(sh_msiof_read(p, RFDR) >> fs, &buf_32[k]);
323}
324
325static int sh_msiof_spi_bits(struct spi_device *spi, struct spi_transfer *t)
326{
327 int bits;
328
329 bits = t ? t->bits_per_word : 0;
330 bits = bits ? bits : spi->bits_per_word;
331 return bits;
332}
333
334static unsigned long sh_msiof_spi_hz(struct spi_device *spi,
335 struct spi_transfer *t)
336{
337 unsigned long hz;
338
339 hz = t ? t->speed_hz : 0;
340 hz = hz ? hz : spi->max_speed_hz;
341 return hz;
342}
343
344static int sh_msiof_spi_setup_transfer(struct spi_device *spi,
345 struct spi_transfer *t)
346{
347 int bits;
348
349 /* noting to check hz values against since parent clock is disabled */
350
351 bits = sh_msiof_spi_bits(spi, t);
352 if (bits < 8)
353 return -EINVAL;
354 if (bits > 32)
355 return -EINVAL;
356
357 return spi_bitbang_setup_transfer(spi, t);
358}
359
360static void sh_msiof_spi_chipselect(struct spi_device *spi, int is_on)
361{
362 struct sh_msiof_spi_priv *p = spi_master_get_devdata(spi->master);
363 int value;
364
365 /* chip select is active low unless SPI_CS_HIGH is set */
366 if (spi->mode & SPI_CS_HIGH)
367 value = (is_on == BITBANG_CS_ACTIVE) ? 1 : 0;
368 else
369 value = (is_on == BITBANG_CS_ACTIVE) ? 0 : 1;
370
371 if (is_on == BITBANG_CS_ACTIVE) {
372 if (!test_and_set_bit(0, &p->flags)) {
373 pm_runtime_get_sync(&p->pdev->dev);
374 clk_enable(p->clk);
375 }
376
377 /* Configure pins before asserting CS */
378 sh_msiof_spi_set_pin_regs(p, !!(spi->mode & SPI_CPOL),
379 !!(spi->mode & SPI_CPHA),
380 !!(spi->mode & SPI_3WIRE),
381 !!(spi->mode & SPI_LSB_FIRST));
382 }
383
384 /* use spi->controller data for CS (same strategy as spi_gpio) */
385 gpio_set_value((unsigned)spi->controller_data, value);
386
387 if (is_on == BITBANG_CS_INACTIVE) {
388 if (test_and_clear_bit(0, &p->flags)) {
389 clk_disable(p->clk);
390 pm_runtime_put(&p->pdev->dev);
391 }
392 }
393}
394
395static int sh_msiof_spi_txrx_once(struct sh_msiof_spi_priv *p,
396 void (*tx_fifo)(struct sh_msiof_spi_priv *,
397 const void *, int, int),
398 void (*rx_fifo)(struct sh_msiof_spi_priv *,
399 void *, int, int),
400 const void *tx_buf, void *rx_buf,
401 int words, int bits)
402{
403 int fifo_shift;
404 int ret;
405
406 /* limit maximum word transfer to rx/tx fifo size */
407 if (tx_buf)
408 words = min_t(int, words, p->tx_fifo_size);
409 if (rx_buf)
410 words = min_t(int, words, p->rx_fifo_size);
411
412 /* the fifo contents need shifting */
413 fifo_shift = 32 - bits;
414
415 /* setup msiof transfer mode registers */
416 sh_msiof_spi_set_mode_regs(p, tx_buf, rx_buf, bits, words);
417
418 /* write tx fifo */
419 if (tx_buf)
420 tx_fifo(p, tx_buf, words, fifo_shift);
421
422 /* setup clock and rx/tx signals */
423 ret = sh_msiof_modify_ctr_wait(p, 0, CTR_TSCKE);
424 if (rx_buf)
425 ret = ret ? ret : sh_msiof_modify_ctr_wait(p, 0, CTR_RXE);
426 ret = ret ? ret : sh_msiof_modify_ctr_wait(p, 0, CTR_TXE);
427
428 /* start by setting frame bit */
429 INIT_COMPLETION(p->done);
430 ret = ret ? ret : sh_msiof_modify_ctr_wait(p, 0, CTR_TFSE);
431 if (ret) {
432 dev_err(&p->pdev->dev, "failed to start hardware\n");
433 goto err;
434 }
435
436 /* wait for tx fifo to be emptied / rx fifo to be filled */
437 wait_for_completion(&p->done);
438
439 /* read rx fifo */
440 if (rx_buf)
441 rx_fifo(p, rx_buf, words, fifo_shift);
442
443 /* clear status bits */
444 sh_msiof_reset_str(p);
445
446 /* shut down frame, tx/tx and clock signals */
447 ret = sh_msiof_modify_ctr_wait(p, CTR_TFSE, 0);
448 ret = ret ? ret : sh_msiof_modify_ctr_wait(p, CTR_TXE, 0);
449 if (rx_buf)
450 ret = ret ? ret : sh_msiof_modify_ctr_wait(p, CTR_RXE, 0);
451 ret = ret ? ret : sh_msiof_modify_ctr_wait(p, CTR_TSCKE, 0);
452 if (ret) {
453 dev_err(&p->pdev->dev, "failed to shut down hardware\n");
454 goto err;
455 }
456
457 return words;
458
459 err:
460 sh_msiof_write(p, IER, 0);
461 return ret;
462}
463
464static int sh_msiof_spi_txrx(struct spi_device *spi, struct spi_transfer *t)
465{
466 struct sh_msiof_spi_priv *p = spi_master_get_devdata(spi->master);
467 void (*tx_fifo)(struct sh_msiof_spi_priv *, const void *, int, int);
468 void (*rx_fifo)(struct sh_msiof_spi_priv *, void *, int, int);
469 int bits;
470 int bytes_per_word;
471 int bytes_done;
472 int words;
473 int n;
474
475 bits = sh_msiof_spi_bits(spi, t);
476
477 /* setup bytes per word and fifo read/write functions */
478 if (bits <= 8) {
479 bytes_per_word = 1;
480 tx_fifo = sh_msiof_spi_write_fifo_8;
481 rx_fifo = sh_msiof_spi_read_fifo_8;
482 } else if (bits <= 16) {
483 bytes_per_word = 2;
484 if ((unsigned long)t->tx_buf & 0x01)
485 tx_fifo = sh_msiof_spi_write_fifo_16u;
486 else
487 tx_fifo = sh_msiof_spi_write_fifo_16;
488
489 if ((unsigned long)t->rx_buf & 0x01)
490 rx_fifo = sh_msiof_spi_read_fifo_16u;
491 else
492 rx_fifo = sh_msiof_spi_read_fifo_16;
493 } else {
494 bytes_per_word = 4;
495 if ((unsigned long)t->tx_buf & 0x03)
496 tx_fifo = sh_msiof_spi_write_fifo_32u;
497 else
498 tx_fifo = sh_msiof_spi_write_fifo_32;
499
500 if ((unsigned long)t->rx_buf & 0x03)
501 rx_fifo = sh_msiof_spi_read_fifo_32u;
502 else
503 rx_fifo = sh_msiof_spi_read_fifo_32;
504 }
505
506 /* setup clocks (clock already enabled in chipselect()) */
507 sh_msiof_spi_set_clk_regs(p, clk_get_rate(p->clk),
508 sh_msiof_spi_hz(spi, t));
509
510 /* transfer in fifo sized chunks */
511 words = t->len / bytes_per_word;
512 bytes_done = 0;
513
514 while (bytes_done < t->len) {
515 n = sh_msiof_spi_txrx_once(p, tx_fifo, rx_fifo,
516 t->tx_buf + bytes_done,
517 t->rx_buf + bytes_done,
518 words, bits);
519 if (n < 0)
520 break;
521
522 bytes_done += n * bytes_per_word;
523 words -= n;
524 }
525
526 return bytes_done;
527}
528
529static u32 sh_msiof_spi_txrx_word(struct spi_device *spi, unsigned nsecs,
530 u32 word, u8 bits)
531{
532 BUG(); /* unused but needed by bitbang code */
533 return 0;
534}
535
536static int sh_msiof_spi_probe(struct platform_device *pdev)
537{
538 struct resource *r;
539 struct spi_master *master;
540 struct sh_msiof_spi_priv *p;
541 char clk_name[16];
542 int i;
543 int ret;
544
545 master = spi_alloc_master(&pdev->dev, sizeof(struct sh_msiof_spi_priv));
546 if (master == NULL) {
547 dev_err(&pdev->dev, "failed to allocate spi master\n");
548 ret = -ENOMEM;
549 goto err0;
550 }
551
552 p = spi_master_get_devdata(master);
553
554 platform_set_drvdata(pdev, p);
555 p->info = pdev->dev.platform_data;
556 init_completion(&p->done);
557
558 snprintf(clk_name, sizeof(clk_name), "msiof%d", pdev->id);
559 p->clk = clk_get(&pdev->dev, clk_name);
560 if (IS_ERR(p->clk)) {
561 dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
562 ret = PTR_ERR(p->clk);
563 goto err1;
564 }
565
566 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
567 i = platform_get_irq(pdev, 0);
568 if (!r || i < 0) {
569 dev_err(&pdev->dev, "cannot get platform resources\n");
570 ret = -ENOENT;
571 goto err2;
572 }
573 p->mapbase = ioremap_nocache(r->start, resource_size(r));
574 if (!p->mapbase) {
575 dev_err(&pdev->dev, "unable to ioremap\n");
576 ret = -ENXIO;
577 goto err2;
578 }
579
580 ret = request_irq(i, sh_msiof_spi_irq, IRQF_DISABLED,
581 dev_name(&pdev->dev), p);
582 if (ret) {
583 dev_err(&pdev->dev, "unable to request irq\n");
584 goto err3;
585 }
586
587 p->pdev = pdev;
588 pm_runtime_enable(&pdev->dev);
589
590 /* The standard version of MSIOF use 64 word FIFOs */
591 p->tx_fifo_size = 64;
592 p->rx_fifo_size = 64;
593
594 /* Platform data may override FIFO sizes */
595 if (p->info->tx_fifo_override)
596 p->tx_fifo_size = p->info->tx_fifo_override;
597 if (p->info->rx_fifo_override)
598 p->rx_fifo_size = p->info->rx_fifo_override;
599
600 /* init master and bitbang code */
601 master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
602 master->mode_bits |= SPI_LSB_FIRST | SPI_3WIRE;
603 master->flags = 0;
604 master->bus_num = pdev->id;
605 master->num_chipselect = p->info->num_chipselect;
606 master->setup = spi_bitbang_setup;
607 master->cleanup = spi_bitbang_cleanup;
608
609 p->bitbang.master = master;
610 p->bitbang.chipselect = sh_msiof_spi_chipselect;
611 p->bitbang.setup_transfer = sh_msiof_spi_setup_transfer;
612 p->bitbang.txrx_bufs = sh_msiof_spi_txrx;
613 p->bitbang.txrx_word[SPI_MODE_0] = sh_msiof_spi_txrx_word;
614 p->bitbang.txrx_word[SPI_MODE_1] = sh_msiof_spi_txrx_word;
615 p->bitbang.txrx_word[SPI_MODE_2] = sh_msiof_spi_txrx_word;
616 p->bitbang.txrx_word[SPI_MODE_3] = sh_msiof_spi_txrx_word;
617
618 ret = spi_bitbang_start(&p->bitbang);
619 if (ret == 0)
620 return 0;
621
622 pm_runtime_disable(&pdev->dev);
623 err3:
624 iounmap(p->mapbase);
625 err2:
626 clk_put(p->clk);
627 err1:
628 spi_master_put(master);
629 err0:
630 return ret;
631}
632
633static int sh_msiof_spi_remove(struct platform_device *pdev)
634{
635 struct sh_msiof_spi_priv *p = platform_get_drvdata(pdev);
636 int ret;
637
638 ret = spi_bitbang_stop(&p->bitbang);
639 if (!ret) {
640 pm_runtime_disable(&pdev->dev);
641 free_irq(platform_get_irq(pdev, 0), sh_msiof_spi_irq);
642 iounmap(p->mapbase);
643 clk_put(p->clk);
644 spi_master_put(p->bitbang.master);
645 }
646 return ret;
647}
648
649static int sh_msiof_spi_runtime_nop(struct device *dev)
650{
651 /* Runtime PM callback shared between ->runtime_suspend()
652 * and ->runtime_resume(). Simply returns success.
653 *
654 * This driver re-initializes all registers after
655 * pm_runtime_get_sync() anyway so there is no need
656 * to save and restore registers here.
657 */
658 return 0;
659}
660
661static struct dev_pm_ops sh_msiof_spi_dev_pm_ops = {
662 .runtime_suspend = sh_msiof_spi_runtime_nop,
663 .runtime_resume = sh_msiof_spi_runtime_nop,
664};
665
666static struct platform_driver sh_msiof_spi_drv = {
667 .probe = sh_msiof_spi_probe,
668 .remove = sh_msiof_spi_remove,
669 .driver = {
670 .name = "spi_sh_msiof",
671 .owner = THIS_MODULE,
672 .pm = &sh_msiof_spi_dev_pm_ops,
673 },
674};
675
676static int __init sh_msiof_spi_init(void)
677{
678 return platform_driver_register(&sh_msiof_spi_drv);
679}
680module_init(sh_msiof_spi_init);
681
682static void __exit sh_msiof_spi_exit(void)
683{
684 platform_driver_unregister(&sh_msiof_spi_drv);
685}
686module_exit(sh_msiof_spi_exit);
687
688MODULE_DESCRIPTION("SuperH MSIOF SPI Master Interface Driver");
689MODULE_AUTHOR("Magnus Damm");
690MODULE_LICENSE("GPL v2");
691MODULE_ALIAS("platform:spi_sh_msiof");
diff --git a/drivers/spi/spidev.c b/drivers/spi/spidev.c
index 20d7322e2f71..9c446e6003d5 100644
--- a/drivers/spi/spidev.c
+++ b/drivers/spi/spidev.c
@@ -266,15 +266,15 @@ static int spidev_message(struct spidev_data *spidev,
266 k_tmp->delay_usecs = u_tmp->delay_usecs; 266 k_tmp->delay_usecs = u_tmp->delay_usecs;
267 k_tmp->speed_hz = u_tmp->speed_hz; 267 k_tmp->speed_hz = u_tmp->speed_hz;
268#ifdef VERBOSE 268#ifdef VERBOSE
269 dev_dbg(&spi->dev, 269 dev_dbg(&spidev->spi->dev,
270 " xfer len %zd %s%s%s%dbits %u usec %uHz\n", 270 " xfer len %zd %s%s%s%dbits %u usec %uHz\n",
271 u_tmp->len, 271 u_tmp->len,
272 u_tmp->rx_buf ? "rx " : "", 272 u_tmp->rx_buf ? "rx " : "",
273 u_tmp->tx_buf ? "tx " : "", 273 u_tmp->tx_buf ? "tx " : "",
274 u_tmp->cs_change ? "cs " : "", 274 u_tmp->cs_change ? "cs " : "",
275 u_tmp->bits_per_word ? : spi->bits_per_word, 275 u_tmp->bits_per_word ? : spidev->spi->bits_per_word,
276 u_tmp->delay_usecs, 276 u_tmp->delay_usecs,
277 u_tmp->speed_hz ? : spi->max_speed_hz); 277 u_tmp->speed_hz ? : spidev->spi->max_speed_hz);
278#endif 278#endif
279 spi_message_add_tail(k_tmp, &msg); 279 spi_message_add_tail(k_tmp, &msg);
280 } 280 }
diff --git a/drivers/spi/xilinx_spi.c b/drivers/spi/xilinx_spi.c
index 5a143b9f6361..9f386379c169 100644
--- a/drivers/spi/xilinx_spi.c
+++ b/drivers/spi/xilinx_spi.c
@@ -14,22 +14,20 @@
14#include <linux/module.h> 14#include <linux/module.h>
15#include <linux/init.h> 15#include <linux/init.h>
16#include <linux/interrupt.h> 16#include <linux/interrupt.h>
17#include <linux/platform_device.h>
18
19#include <linux/of_platform.h>
20#include <linux/of_device.h>
21#include <linux/of_spi.h>
22 17
23#include <linux/spi/spi.h> 18#include <linux/spi/spi.h>
24#include <linux/spi/spi_bitbang.h> 19#include <linux/spi/spi_bitbang.h>
25#include <linux/io.h> 20#include <linux/io.h>
26 21
22#include "xilinx_spi.h"
23#include <linux/spi/xilinx_spi.h>
24
27#define XILINX_SPI_NAME "xilinx_spi" 25#define XILINX_SPI_NAME "xilinx_spi"
28 26
29/* Register definitions as per "OPB Serial Peripheral Interface (SPI) (v1.00e) 27/* Register definitions as per "OPB Serial Peripheral Interface (SPI) (v1.00e)
30 * Product Specification", DS464 28 * Product Specification", DS464
31 */ 29 */
32#define XSPI_CR_OFFSET 0x62 /* 16-bit Control Register */ 30#define XSPI_CR_OFFSET 0x60 /* Control Register */
33 31
34#define XSPI_CR_ENABLE 0x02 32#define XSPI_CR_ENABLE 0x02
35#define XSPI_CR_MASTER_MODE 0x04 33#define XSPI_CR_MASTER_MODE 0x04
@@ -40,8 +38,9 @@
40#define XSPI_CR_RXFIFO_RESET 0x40 38#define XSPI_CR_RXFIFO_RESET 0x40
41#define XSPI_CR_MANUAL_SSELECT 0x80 39#define XSPI_CR_MANUAL_SSELECT 0x80
42#define XSPI_CR_TRANS_INHIBIT 0x100 40#define XSPI_CR_TRANS_INHIBIT 0x100
41#define XSPI_CR_LSB_FIRST 0x200
43 42
44#define XSPI_SR_OFFSET 0x67 /* 8-bit Status Register */ 43#define XSPI_SR_OFFSET 0x64 /* Status Register */
45 44
46#define XSPI_SR_RX_EMPTY_MASK 0x01 /* Receive FIFO is empty */ 45#define XSPI_SR_RX_EMPTY_MASK 0x01 /* Receive FIFO is empty */
47#define XSPI_SR_RX_FULL_MASK 0x02 /* Receive FIFO is full */ 46#define XSPI_SR_RX_FULL_MASK 0x02 /* Receive FIFO is full */
@@ -49,8 +48,8 @@
49#define XSPI_SR_TX_FULL_MASK 0x08 /* Transmit FIFO is full */ 48#define XSPI_SR_TX_FULL_MASK 0x08 /* Transmit FIFO is full */
50#define XSPI_SR_MODE_FAULT_MASK 0x10 /* Mode fault error */ 49#define XSPI_SR_MODE_FAULT_MASK 0x10 /* Mode fault error */
51 50
52#define XSPI_TXD_OFFSET 0x6b /* 8-bit Data Transmit Register */ 51#define XSPI_TXD_OFFSET 0x68 /* Data Transmit Register */
53#define XSPI_RXD_OFFSET 0x6f /* 8-bit Data Receive Register */ 52#define XSPI_RXD_OFFSET 0x6c /* Data Receive Register */
54 53
55#define XSPI_SSR_OFFSET 0x70 /* 32-bit Slave Select Register */ 54#define XSPI_SSR_OFFSET 0x70 /* 32-bit Slave Select Register */
56 55
@@ -70,6 +69,7 @@
70#define XSPI_INTR_TX_UNDERRUN 0x08 /* TxFIFO was underrun */ 69#define XSPI_INTR_TX_UNDERRUN 0x08 /* TxFIFO was underrun */
71#define XSPI_INTR_RX_FULL 0x10 /* RxFIFO is full */ 70#define XSPI_INTR_RX_FULL 0x10 /* RxFIFO is full */
72#define XSPI_INTR_RX_OVERRUN 0x20 /* RxFIFO was overrun */ 71#define XSPI_INTR_RX_OVERRUN 0x20 /* RxFIFO was overrun */
72#define XSPI_INTR_TX_HALF_EMPTY 0x40 /* TxFIFO is half empty */
73 73
74#define XIPIF_V123B_RESETR_OFFSET 0x40 /* IPIF reset register */ 74#define XIPIF_V123B_RESETR_OFFSET 0x40 /* IPIF reset register */
75#define XIPIF_V123B_RESET_MASK 0x0a /* the value to write */ 75#define XIPIF_V123B_RESET_MASK 0x0a /* the value to write */
@@ -78,35 +78,85 @@ struct xilinx_spi {
78 /* bitbang has to be first */ 78 /* bitbang has to be first */
79 struct spi_bitbang bitbang; 79 struct spi_bitbang bitbang;
80 struct completion done; 80 struct completion done;
81 81 struct resource mem; /* phys mem */
82 void __iomem *regs; /* virt. address of the control registers */ 82 void __iomem *regs; /* virt. address of the control registers */
83 83
84 u32 irq; 84 u32 irq;
85 85
86 u32 speed_hz; /* SCK has a fixed frequency of speed_hz Hz */
87
88 u8 *rx_ptr; /* pointer in the Tx buffer */ 86 u8 *rx_ptr; /* pointer in the Tx buffer */
89 const u8 *tx_ptr; /* pointer in the Rx buffer */ 87 const u8 *tx_ptr; /* pointer in the Rx buffer */
90 int remaining_bytes; /* the number of bytes left to transfer */ 88 int remaining_bytes; /* the number of bytes left to transfer */
89 u8 bits_per_word;
90 unsigned int (*read_fn) (void __iomem *);
91 void (*write_fn) (u32, void __iomem *);
92 void (*tx_fn) (struct xilinx_spi *);
93 void (*rx_fn) (struct xilinx_spi *);
91}; 94};
92 95
93static void xspi_init_hw(void __iomem *regs_base) 96static void xspi_tx8(struct xilinx_spi *xspi)
97{
98 xspi->write_fn(*xspi->tx_ptr, xspi->regs + XSPI_TXD_OFFSET);
99 xspi->tx_ptr++;
100}
101
102static void xspi_tx16(struct xilinx_spi *xspi)
103{
104 xspi->write_fn(*(u16 *)(xspi->tx_ptr), xspi->regs + XSPI_TXD_OFFSET);
105 xspi->tx_ptr += 2;
106}
107
108static void xspi_tx32(struct xilinx_spi *xspi)
109{
110 xspi->write_fn(*(u32 *)(xspi->tx_ptr), xspi->regs + XSPI_TXD_OFFSET);
111 xspi->tx_ptr += 4;
112}
113
114static void xspi_rx8(struct xilinx_spi *xspi)
115{
116 u32 data = xspi->read_fn(xspi->regs + XSPI_RXD_OFFSET);
117 if (xspi->rx_ptr) {
118 *xspi->rx_ptr = data & 0xff;
119 xspi->rx_ptr++;
120 }
121}
122
123static void xspi_rx16(struct xilinx_spi *xspi)
94{ 124{
125 u32 data = xspi->read_fn(xspi->regs + XSPI_RXD_OFFSET);
126 if (xspi->rx_ptr) {
127 *(u16 *)(xspi->rx_ptr) = data & 0xffff;
128 xspi->rx_ptr += 2;
129 }
130}
131
132static void xspi_rx32(struct xilinx_spi *xspi)
133{
134 u32 data = xspi->read_fn(xspi->regs + XSPI_RXD_OFFSET);
135 if (xspi->rx_ptr) {
136 *(u32 *)(xspi->rx_ptr) = data;
137 xspi->rx_ptr += 4;
138 }
139}
140
141static void xspi_init_hw(struct xilinx_spi *xspi)
142{
143 void __iomem *regs_base = xspi->regs;
144
95 /* Reset the SPI device */ 145 /* Reset the SPI device */
96 out_be32(regs_base + XIPIF_V123B_RESETR_OFFSET, 146 xspi->write_fn(XIPIF_V123B_RESET_MASK,
97 XIPIF_V123B_RESET_MASK); 147 regs_base + XIPIF_V123B_RESETR_OFFSET);
98 /* Disable all the interrupts just in case */ 148 /* Disable all the interrupts just in case */
99 out_be32(regs_base + XIPIF_V123B_IIER_OFFSET, 0); 149 xspi->write_fn(0, regs_base + XIPIF_V123B_IIER_OFFSET);
100 /* Enable the global IPIF interrupt */ 150 /* Enable the global IPIF interrupt */
101 out_be32(regs_base + XIPIF_V123B_DGIER_OFFSET, 151 xspi->write_fn(XIPIF_V123B_GINTR_ENABLE,
102 XIPIF_V123B_GINTR_ENABLE); 152 regs_base + XIPIF_V123B_DGIER_OFFSET);
103 /* Deselect the slave on the SPI bus */ 153 /* Deselect the slave on the SPI bus */
104 out_be32(regs_base + XSPI_SSR_OFFSET, 0xffff); 154 xspi->write_fn(0xffff, regs_base + XSPI_SSR_OFFSET);
105 /* Disable the transmitter, enable Manual Slave Select Assertion, 155 /* Disable the transmitter, enable Manual Slave Select Assertion,
106 * put SPI controller into master mode, and enable it */ 156 * put SPI controller into master mode, and enable it */
107 out_be16(regs_base + XSPI_CR_OFFSET, 157 xspi->write_fn(XSPI_CR_TRANS_INHIBIT | XSPI_CR_MANUAL_SSELECT |
108 XSPI_CR_TRANS_INHIBIT | XSPI_CR_MANUAL_SSELECT 158 XSPI_CR_MASTER_MODE | XSPI_CR_ENABLE | XSPI_CR_TXFIFO_RESET |
109 | XSPI_CR_MASTER_MODE | XSPI_CR_ENABLE); 159 XSPI_CR_RXFIFO_RESET, regs_base + XSPI_CR_OFFSET);
110} 160}
111 161
112static void xilinx_spi_chipselect(struct spi_device *spi, int is_on) 162static void xilinx_spi_chipselect(struct spi_device *spi, int is_on)
@@ -115,16 +165,16 @@ static void xilinx_spi_chipselect(struct spi_device *spi, int is_on)
115 165
116 if (is_on == BITBANG_CS_INACTIVE) { 166 if (is_on == BITBANG_CS_INACTIVE) {
117 /* Deselect the slave on the SPI bus */ 167 /* Deselect the slave on the SPI bus */
118 out_be32(xspi->regs + XSPI_SSR_OFFSET, 0xffff); 168 xspi->write_fn(0xffff, xspi->regs + XSPI_SSR_OFFSET);
119 } else if (is_on == BITBANG_CS_ACTIVE) { 169 } else if (is_on == BITBANG_CS_ACTIVE) {
120 /* Set the SPI clock phase and polarity */ 170 /* Set the SPI clock phase and polarity */
121 u16 cr = in_be16(xspi->regs + XSPI_CR_OFFSET) 171 u16 cr = xspi->read_fn(xspi->regs + XSPI_CR_OFFSET)
122 & ~XSPI_CR_MODE_MASK; 172 & ~XSPI_CR_MODE_MASK;
123 if (spi->mode & SPI_CPHA) 173 if (spi->mode & SPI_CPHA)
124 cr |= XSPI_CR_CPHA; 174 cr |= XSPI_CR_CPHA;
125 if (spi->mode & SPI_CPOL) 175 if (spi->mode & SPI_CPOL)
126 cr |= XSPI_CR_CPOL; 176 cr |= XSPI_CR_CPOL;
127 out_be16(xspi->regs + XSPI_CR_OFFSET, cr); 177 xspi->write_fn(cr, xspi->regs + XSPI_CR_OFFSET);
128 178
129 /* We do not check spi->max_speed_hz here as the SPI clock 179 /* We do not check spi->max_speed_hz here as the SPI clock
130 * frequency is not software programmable (the IP block design 180 * frequency is not software programmable (the IP block design
@@ -132,25 +182,27 @@ static void xilinx_spi_chipselect(struct spi_device *spi, int is_on)
132 */ 182 */
133 183
134 /* Activate the chip select */ 184 /* Activate the chip select */
135 out_be32(xspi->regs + XSPI_SSR_OFFSET, 185 xspi->write_fn(~(0x0001 << spi->chip_select),
136 ~(0x0001 << spi->chip_select)); 186 xspi->regs + XSPI_SSR_OFFSET);
137 } 187 }
138} 188}
139 189
140/* spi_bitbang requires custom setup_transfer() to be defined if there is a 190/* spi_bitbang requires custom setup_transfer() to be defined if there is a
141 * custom txrx_bufs(). We have nothing to setup here as the SPI IP block 191 * custom txrx_bufs(). We have nothing to setup here as the SPI IP block
142 * supports just 8 bits per word, and SPI clock can't be changed in software. 192 * supports 8 or 16 bits per word which cannot be changed in software.
143 * Check for 8 bits per word. Chip select delay calculations could be 193 * SPI clock can't be changed in software either.
194 * Check for correct bits per word. Chip select delay calculations could be
144 * added here as soon as bitbang_work() can be made aware of the delay value. 195 * added here as soon as bitbang_work() can be made aware of the delay value.
145 */ 196 */
146static int xilinx_spi_setup_transfer(struct spi_device *spi, 197static int xilinx_spi_setup_transfer(struct spi_device *spi,
147 struct spi_transfer *t) 198 struct spi_transfer *t)
148{ 199{
200 struct xilinx_spi *xspi = spi_master_get_devdata(spi->master);
149 u8 bits_per_word; 201 u8 bits_per_word;
150 202
151 bits_per_word = (t && t->bits_per_word) 203 bits_per_word = (t && t->bits_per_word)
152 ? t->bits_per_word : spi->bits_per_word; 204 ? t->bits_per_word : spi->bits_per_word;
153 if (bits_per_word != 8) { 205 if (bits_per_word != xspi->bits_per_word) {
154 dev_err(&spi->dev, "%s, unsupported bits_per_word=%d\n", 206 dev_err(&spi->dev, "%s, unsupported bits_per_word=%d\n",
155 __func__, bits_per_word); 207 __func__, bits_per_word);
156 return -EINVAL; 208 return -EINVAL;
@@ -161,17 +213,16 @@ static int xilinx_spi_setup_transfer(struct spi_device *spi,
161 213
162static int xilinx_spi_setup(struct spi_device *spi) 214static int xilinx_spi_setup(struct spi_device *spi)
163{ 215{
164 struct spi_bitbang *bitbang; 216 /* always return 0, we can not check the number of bits.
165 struct xilinx_spi *xspi; 217 * There are cases when SPI setup is called before any driver is
166 int retval; 218 * there, in that case the SPI core defaults to 8 bits, which we
167 219 * do not support in some cases. But if we return an error, the
168 xspi = spi_master_get_devdata(spi->master); 220 * SPI device would not be registered and no driver can get hold of it
169 bitbang = &xspi->bitbang; 221 * When the driver is there, it will call SPI setup again with the
170 222 * correct number of bits per transfer.
171 retval = xilinx_spi_setup_transfer(spi, NULL); 223 * If a driver setups with the wrong bit number, it will fail when
172 if (retval < 0) 224 * it tries to do a transfer
173 return retval; 225 */
174
175 return 0; 226 return 0;
176} 227}
177 228
@@ -180,15 +231,14 @@ static void xilinx_spi_fill_tx_fifo(struct xilinx_spi *xspi)
180 u8 sr; 231 u8 sr;
181 232
182 /* Fill the Tx FIFO with as many bytes as possible */ 233 /* Fill the Tx FIFO with as many bytes as possible */
183 sr = in_8(xspi->regs + XSPI_SR_OFFSET); 234 sr = xspi->read_fn(xspi->regs + XSPI_SR_OFFSET);
184 while ((sr & XSPI_SR_TX_FULL_MASK) == 0 && xspi->remaining_bytes > 0) { 235 while ((sr & XSPI_SR_TX_FULL_MASK) == 0 && xspi->remaining_bytes > 0) {
185 if (xspi->tx_ptr) { 236 if (xspi->tx_ptr)
186 out_8(xspi->regs + XSPI_TXD_OFFSET, *xspi->tx_ptr++); 237 xspi->tx_fn(xspi);
187 } else { 238 else
188 out_8(xspi->regs + XSPI_TXD_OFFSET, 0); 239 xspi->write_fn(0, xspi->regs + XSPI_TXD_OFFSET);
189 } 240 xspi->remaining_bytes -= xspi->bits_per_word / 8;
190 xspi->remaining_bytes--; 241 sr = xspi->read_fn(xspi->regs + XSPI_SR_OFFSET);
191 sr = in_8(xspi->regs + XSPI_SR_OFFSET);
192 } 242 }
193} 243}
194 244
@@ -210,18 +260,19 @@ static int xilinx_spi_txrx_bufs(struct spi_device *spi, struct spi_transfer *t)
210 /* Enable the transmit empty interrupt, which we use to determine 260 /* Enable the transmit empty interrupt, which we use to determine
211 * progress on the transmission. 261 * progress on the transmission.
212 */ 262 */
213 ipif_ier = in_be32(xspi->regs + XIPIF_V123B_IIER_OFFSET); 263 ipif_ier = xspi->read_fn(xspi->regs + XIPIF_V123B_IIER_OFFSET);
214 out_be32(xspi->regs + XIPIF_V123B_IIER_OFFSET, 264 xspi->write_fn(ipif_ier | XSPI_INTR_TX_EMPTY,
215 ipif_ier | XSPI_INTR_TX_EMPTY); 265 xspi->regs + XIPIF_V123B_IIER_OFFSET);
216 266
217 /* Start the transfer by not inhibiting the transmitter any longer */ 267 /* Start the transfer by not inhibiting the transmitter any longer */
218 cr = in_be16(xspi->regs + XSPI_CR_OFFSET) & ~XSPI_CR_TRANS_INHIBIT; 268 cr = xspi->read_fn(xspi->regs + XSPI_CR_OFFSET) &
219 out_be16(xspi->regs + XSPI_CR_OFFSET, cr); 269 ~XSPI_CR_TRANS_INHIBIT;
270 xspi->write_fn(cr, xspi->regs + XSPI_CR_OFFSET);
220 271
221 wait_for_completion(&xspi->done); 272 wait_for_completion(&xspi->done);
222 273
223 /* Disable the transmit empty interrupt */ 274 /* Disable the transmit empty interrupt */
224 out_be32(xspi->regs + XIPIF_V123B_IIER_OFFSET, ipif_ier); 275 xspi->write_fn(ipif_ier, xspi->regs + XIPIF_V123B_IIER_OFFSET);
225 276
226 return t->len - xspi->remaining_bytes; 277 return t->len - xspi->remaining_bytes;
227} 278}
@@ -238,8 +289,8 @@ static irqreturn_t xilinx_spi_irq(int irq, void *dev_id)
238 u32 ipif_isr; 289 u32 ipif_isr;
239 290
240 /* Get the IPIF interrupts, and clear them immediately */ 291 /* Get the IPIF interrupts, and clear them immediately */
241 ipif_isr = in_be32(xspi->regs + XIPIF_V123B_IISR_OFFSET); 292 ipif_isr = xspi->read_fn(xspi->regs + XIPIF_V123B_IISR_OFFSET);
242 out_be32(xspi->regs + XIPIF_V123B_IISR_OFFSET, ipif_isr); 293 xspi->write_fn(ipif_isr, xspi->regs + XIPIF_V123B_IISR_OFFSET);
243 294
244 if (ipif_isr & XSPI_INTR_TX_EMPTY) { /* Transmission completed */ 295 if (ipif_isr & XSPI_INTR_TX_EMPTY) { /* Transmission completed */
245 u16 cr; 296 u16 cr;
@@ -250,20 +301,15 @@ static irqreturn_t xilinx_spi_irq(int irq, void *dev_id)
250 * transmitter while the Isr refills the transmit register/FIFO, 301 * transmitter while the Isr refills the transmit register/FIFO,
251 * or make sure it is stopped if we're done. 302 * or make sure it is stopped if we're done.
252 */ 303 */
253 cr = in_be16(xspi->regs + XSPI_CR_OFFSET); 304 cr = xspi->read_fn(xspi->regs + XSPI_CR_OFFSET);
254 out_be16(xspi->regs + XSPI_CR_OFFSET, 305 xspi->write_fn(cr | XSPI_CR_TRANS_INHIBIT,
255 cr | XSPI_CR_TRANS_INHIBIT); 306 xspi->regs + XSPI_CR_OFFSET);
256 307
257 /* Read out all the data from the Rx FIFO */ 308 /* Read out all the data from the Rx FIFO */
258 sr = in_8(xspi->regs + XSPI_SR_OFFSET); 309 sr = xspi->read_fn(xspi->regs + XSPI_SR_OFFSET);
259 while ((sr & XSPI_SR_RX_EMPTY_MASK) == 0) { 310 while ((sr & XSPI_SR_RX_EMPTY_MASK) == 0) {
260 u8 data; 311 xspi->rx_fn(xspi);
261 312 sr = xspi->read_fn(xspi->regs + XSPI_SR_OFFSET);
262 data = in_8(xspi->regs + XSPI_RXD_OFFSET);
263 if (xspi->rx_ptr) {
264 *xspi->rx_ptr++ = data;
265 }
266 sr = in_8(xspi->regs + XSPI_SR_OFFSET);
267 } 313 }
268 314
269 /* See if there is more data to send */ 315 /* See if there is more data to send */
@@ -272,7 +318,7 @@ static irqreturn_t xilinx_spi_irq(int irq, void *dev_id)
272 /* Start the transfer by not inhibiting the 318 /* Start the transfer by not inhibiting the
273 * transmitter any longer 319 * transmitter any longer
274 */ 320 */
275 out_be16(xspi->regs + XSPI_CR_OFFSET, cr); 321 xspi->write_fn(cr, xspi->regs + XSPI_CR_OFFSET);
276 } else { 322 } else {
277 /* No more data to send. 323 /* No more data to send.
278 * Indicate the transfer is completed. 324 * Indicate the transfer is completed.
@@ -284,40 +330,22 @@ static irqreturn_t xilinx_spi_irq(int irq, void *dev_id)
284 return IRQ_HANDLED; 330 return IRQ_HANDLED;
285} 331}
286 332
287static int __init xilinx_spi_of_probe(struct of_device *ofdev, 333struct spi_master *xilinx_spi_init(struct device *dev, struct resource *mem,
288 const struct of_device_id *match) 334 u32 irq, s16 bus_num)
289{ 335{
290 struct spi_master *master; 336 struct spi_master *master;
291 struct xilinx_spi *xspi; 337 struct xilinx_spi *xspi;
292 struct resource r_irq_struct; 338 struct xspi_platform_data *pdata = dev->platform_data;
293 struct resource r_mem_struct; 339 int ret;
294
295 struct resource *r_irq = &r_irq_struct;
296 struct resource *r_mem = &r_mem_struct;
297 int rc = 0;
298 const u32 *prop;
299 int len;
300
301 /* Get resources(memory, IRQ) associated with the device */
302 master = spi_alloc_master(&ofdev->dev, sizeof(struct xilinx_spi));
303 340
304 if (master == NULL) { 341 if (!pdata) {
305 return -ENOMEM; 342 dev_err(dev, "No platform data attached\n");
343 return NULL;
306 } 344 }
307 345
308 dev_set_drvdata(&ofdev->dev, master); 346 master = spi_alloc_master(dev, sizeof(struct xilinx_spi));
309 347 if (!master)
310 rc = of_address_to_resource(ofdev->node, 0, r_mem); 348 return NULL;
311 if (rc) {
312 dev_warn(&ofdev->dev, "invalid address\n");
313 goto put_master;
314 }
315
316 rc = of_irq_to_resource(ofdev->node, 0, r_irq);
317 if (rc == NO_IRQ) {
318 dev_warn(&ofdev->dev, "no IRQ found\n");
319 goto put_master;
320 }
321 349
322 /* the spi->mode bits understood by this driver: */ 350 /* the spi->mode bits understood by this driver: */
323 master->mode_bits = SPI_CPOL | SPI_CPHA; 351 master->mode_bits = SPI_CPOL | SPI_CPHA;
@@ -330,128 +358,87 @@ static int __init xilinx_spi_of_probe(struct of_device *ofdev,
330 xspi->bitbang.master->setup = xilinx_spi_setup; 358 xspi->bitbang.master->setup = xilinx_spi_setup;
331 init_completion(&xspi->done); 359 init_completion(&xspi->done);
332 360
333 xspi->irq = r_irq->start; 361 if (!request_mem_region(mem->start, resource_size(mem),
334 362 XILINX_SPI_NAME))
335 if (!request_mem_region(r_mem->start,
336 r_mem->end - r_mem->start + 1, XILINX_SPI_NAME)) {
337 rc = -ENXIO;
338 dev_warn(&ofdev->dev, "memory request failure\n");
339 goto put_master; 363 goto put_master;
340 }
341 364
342 xspi->regs = ioremap(r_mem->start, r_mem->end - r_mem->start + 1); 365 xspi->regs = ioremap(mem->start, resource_size(mem));
343 if (xspi->regs == NULL) { 366 if (xspi->regs == NULL) {
344 rc = -ENOMEM; 367 dev_warn(dev, "ioremap failure\n");
345 dev_warn(&ofdev->dev, "ioremap failure\n"); 368 goto map_failed;
346 goto release_mem;
347 } 369 }
348 xspi->irq = r_irq->start;
349
350 /* dynamic bus assignment */
351 master->bus_num = -1;
352 370
353 /* number of slave select bits is required */ 371 master->bus_num = bus_num;
354 prop = of_get_property(ofdev->node, "xlnx,num-ss-bits", &len); 372 master->num_chipselect = pdata->num_chipselect;
355 if (!prop || len < sizeof(*prop)) { 373
356 dev_warn(&ofdev->dev, "no 'xlnx,num-ss-bits' property\n"); 374 xspi->mem = *mem;
357 goto unmap_io; 375 xspi->irq = irq;
376 if (pdata->little_endian) {
377 xspi->read_fn = ioread32;
378 xspi->write_fn = iowrite32;
379 } else {
380 xspi->read_fn = ioread32be;
381 xspi->write_fn = iowrite32be;
358 } 382 }
359 master->num_chipselect = *prop; 383 xspi->bits_per_word = pdata->bits_per_word;
384 if (xspi->bits_per_word == 8) {
385 xspi->tx_fn = xspi_tx8;
386 xspi->rx_fn = xspi_rx8;
387 } else if (xspi->bits_per_word == 16) {
388 xspi->tx_fn = xspi_tx16;
389 xspi->rx_fn = xspi_rx16;
390 } else if (xspi->bits_per_word == 32) {
391 xspi->tx_fn = xspi_tx32;
392 xspi->rx_fn = xspi_rx32;
393 } else
394 goto unmap_io;
395
360 396
361 /* SPI controller initializations */ 397 /* SPI controller initializations */
362 xspi_init_hw(xspi->regs); 398 xspi_init_hw(xspi);
363 399
364 /* Register for SPI Interrupt */ 400 /* Register for SPI Interrupt */
365 rc = request_irq(xspi->irq, xilinx_spi_irq, 0, XILINX_SPI_NAME, xspi); 401 ret = request_irq(xspi->irq, xilinx_spi_irq, 0, XILINX_SPI_NAME, xspi);
366 if (rc != 0) { 402 if (ret)
367 dev_warn(&ofdev->dev, "irq request failure: %d\n", xspi->irq);
368 goto unmap_io; 403 goto unmap_io;
369 }
370 404
371 rc = spi_bitbang_start(&xspi->bitbang); 405 ret = spi_bitbang_start(&xspi->bitbang);
372 if (rc != 0) { 406 if (ret) {
373 dev_err(&ofdev->dev, "spi_bitbang_start FAILED\n"); 407 dev_err(dev, "spi_bitbang_start FAILED\n");
374 goto free_irq; 408 goto free_irq;
375 } 409 }
376 410
377 dev_info(&ofdev->dev, "at 0x%08X mapped to 0x%08X, irq=%d\n", 411 dev_info(dev, "at 0x%08llX mapped to 0x%p, irq=%d\n",
378 (unsigned int)r_mem->start, (u32)xspi->regs, xspi->irq); 412 (unsigned long long)mem->start, xspi->regs, xspi->irq);
379 413 return master;
380 /* Add any subnodes on the SPI bus */
381 of_register_spi_devices(master, ofdev->node);
382
383 return rc;
384 414
385free_irq: 415free_irq:
386 free_irq(xspi->irq, xspi); 416 free_irq(xspi->irq, xspi);
387unmap_io: 417unmap_io:
388 iounmap(xspi->regs); 418 iounmap(xspi->regs);
389release_mem: 419map_failed:
390 release_mem_region(r_mem->start, resource_size(r_mem)); 420 release_mem_region(mem->start, resource_size(mem));
391put_master: 421put_master:
392 spi_master_put(master); 422 spi_master_put(master);
393 return rc; 423 return NULL;
394} 424}
425EXPORT_SYMBOL(xilinx_spi_init);
395 426
396static int __devexit xilinx_spi_remove(struct of_device *ofdev) 427void xilinx_spi_deinit(struct spi_master *master)
397{ 428{
398 struct xilinx_spi *xspi; 429 struct xilinx_spi *xspi;
399 struct spi_master *master;
400 struct resource r_mem;
401 430
402 master = platform_get_drvdata(ofdev);
403 xspi = spi_master_get_devdata(master); 431 xspi = spi_master_get_devdata(master);
404 432
405 spi_bitbang_stop(&xspi->bitbang); 433 spi_bitbang_stop(&xspi->bitbang);
406 free_irq(xspi->irq, xspi); 434 free_irq(xspi->irq, xspi);
407 iounmap(xspi->regs); 435 iounmap(xspi->regs);
408 if (!of_address_to_resource(ofdev->node, 0, &r_mem))
409 release_mem_region(r_mem.start, resource_size(&r_mem));
410 dev_set_drvdata(&ofdev->dev, 0);
411 spi_master_put(xspi->bitbang.master);
412
413 return 0;
414}
415
416/* work with hotplug and coldplug */
417MODULE_ALIAS("platform:" XILINX_SPI_NAME);
418
419static int __exit xilinx_spi_of_remove(struct of_device *op)
420{
421 return xilinx_spi_remove(op);
422}
423 436
424static struct of_device_id xilinx_spi_of_match[] = { 437 release_mem_region(xspi->mem.start, resource_size(&xspi->mem));
425 { .compatible = "xlnx,xps-spi-2.00.a", }, 438 spi_master_put(xspi->bitbang.master);
426 { .compatible = "xlnx,xps-spi-2.00.b", },
427 {}
428};
429
430MODULE_DEVICE_TABLE(of, xilinx_spi_of_match);
431
432static struct of_platform_driver xilinx_spi_of_driver = {
433 .owner = THIS_MODULE,
434 .name = "xilinx-xps-spi",
435 .match_table = xilinx_spi_of_match,
436 .probe = xilinx_spi_of_probe,
437 .remove = __exit_p(xilinx_spi_of_remove),
438 .driver = {
439 .name = "xilinx-xps-spi",
440 .owner = THIS_MODULE,
441 },
442};
443
444static int __init xilinx_spi_init(void)
445{
446 return of_register_platform_driver(&xilinx_spi_of_driver);
447} 439}
448module_init(xilinx_spi_init); 440EXPORT_SYMBOL(xilinx_spi_deinit);
449 441
450static void __exit xilinx_spi_exit(void)
451{
452 of_unregister_platform_driver(&xilinx_spi_of_driver);
453}
454module_exit(xilinx_spi_exit);
455MODULE_AUTHOR("MontaVista Software, Inc. <source@mvista.com>"); 442MODULE_AUTHOR("MontaVista Software, Inc. <source@mvista.com>");
456MODULE_DESCRIPTION("Xilinx SPI driver"); 443MODULE_DESCRIPTION("Xilinx SPI driver");
457MODULE_LICENSE("GPL"); 444MODULE_LICENSE("GPL");
diff --git a/drivers/spi/xilinx_spi.h b/drivers/spi/xilinx_spi.h
new file mode 100644
index 000000000000..d211accf68d2
--- /dev/null
+++ b/drivers/spi/xilinx_spi.h
@@ -0,0 +1,32 @@
1/*
2 * Xilinx SPI device driver API and platform data header file
3 *
4 * Copyright (c) 2009 Intel Corporation
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 */
19
20#ifndef _XILINX_SPI_H_
21#define _XILINX_SPI_H_
22
23#include <linux/spi/spi.h>
24#include <linux/spi/spi_bitbang.h>
25
26#define XILINX_SPI_NAME "xilinx_spi"
27
28struct spi_master *xilinx_spi_init(struct device *dev, struct resource *mem,
29 u32 irq, s16 bus_num);
30
31void xilinx_spi_deinit(struct spi_master *master);
32#endif
diff --git a/drivers/spi/xilinx_spi_of.c b/drivers/spi/xilinx_spi_of.c
new file mode 100644
index 000000000000..71dc3adc0495
--- /dev/null
+++ b/drivers/spi/xilinx_spi_of.c
@@ -0,0 +1,134 @@
1/*
2 * Xilinx SPI OF device driver
3 *
4 * Copyright (c) 2009 Intel Corporation
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 */
19
20/* Supports:
21 * Xilinx SPI devices as OF devices
22 *
23 * Inspired by xilinx_spi.c, 2002-2007 (c) MontaVista Software, Inc.
24 */
25
26#include <linux/module.h>
27#include <linux/init.h>
28#include <linux/interrupt.h>
29#include <linux/io.h>
30
31#include <linux/of_platform.h>
32#include <linux/of_device.h>
33#include <linux/of_spi.h>
34
35#include <linux/spi/xilinx_spi.h>
36#include "xilinx_spi.h"
37
38
39static int __devinit xilinx_spi_of_probe(struct of_device *ofdev,
40 const struct of_device_id *match)
41{
42 struct spi_master *master;
43 struct xspi_platform_data *pdata;
44 struct resource r_mem;
45 struct resource r_irq;
46 int rc = 0;
47 const u32 *prop;
48 int len;
49
50 rc = of_address_to_resource(ofdev->node, 0, &r_mem);
51 if (rc) {
52 dev_warn(&ofdev->dev, "invalid address\n");
53 return rc;
54 }
55
56 rc = of_irq_to_resource(ofdev->node, 0, &r_irq);
57 if (rc == NO_IRQ) {
58 dev_warn(&ofdev->dev, "no IRQ found\n");
59 return -ENODEV;
60 }
61
62 ofdev->dev.platform_data =
63 kzalloc(sizeof(struct xspi_platform_data), GFP_KERNEL);
64 pdata = ofdev->dev.platform_data;
65 if (!pdata)
66 return -ENOMEM;
67
68 /* number of slave select bits is required */
69 prop = of_get_property(ofdev->node, "xlnx,num-ss-bits", &len);
70 if (!prop || len < sizeof(*prop)) {
71 dev_warn(&ofdev->dev, "no 'xlnx,num-ss-bits' property\n");
72 return -EINVAL;
73 }
74 pdata->num_chipselect = *prop;
75 pdata->bits_per_word = 8;
76 master = xilinx_spi_init(&ofdev->dev, &r_mem, r_irq.start, -1);
77 if (!master)
78 return -ENODEV;
79
80 dev_set_drvdata(&ofdev->dev, master);
81
82 /* Add any subnodes on the SPI bus */
83 of_register_spi_devices(master, ofdev->node);
84
85 return 0;
86}
87
88static int __devexit xilinx_spi_remove(struct of_device *ofdev)
89{
90 xilinx_spi_deinit(dev_get_drvdata(&ofdev->dev));
91 dev_set_drvdata(&ofdev->dev, 0);
92 kfree(ofdev->dev.platform_data);
93 ofdev->dev.platform_data = NULL;
94 return 0;
95}
96
97static int __exit xilinx_spi_of_remove(struct of_device *op)
98{
99 return xilinx_spi_remove(op);
100}
101
102static struct of_device_id xilinx_spi_of_match[] = {
103 { .compatible = "xlnx,xps-spi-2.00.a", },
104 { .compatible = "xlnx,xps-spi-2.00.b", },
105 {}
106};
107
108MODULE_DEVICE_TABLE(of, xilinx_spi_of_match);
109
110static struct of_platform_driver xilinx_spi_of_driver = {
111 .match_table = xilinx_spi_of_match,
112 .probe = xilinx_spi_of_probe,
113 .remove = __exit_p(xilinx_spi_of_remove),
114 .driver = {
115 .name = "xilinx-xps-spi",
116 .owner = THIS_MODULE,
117 },
118};
119
120static int __init xilinx_spi_of_init(void)
121{
122 return of_register_platform_driver(&xilinx_spi_of_driver);
123}
124module_init(xilinx_spi_of_init);
125
126static void __exit xilinx_spi_of_exit(void)
127{
128 of_unregister_platform_driver(&xilinx_spi_of_driver);
129}
130module_exit(xilinx_spi_of_exit);
131
132MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
133MODULE_DESCRIPTION("Xilinx SPI platform driver");
134MODULE_LICENSE("GPL v2");
diff --git a/drivers/spi/xilinx_spi_pltfm.c b/drivers/spi/xilinx_spi_pltfm.c
new file mode 100644
index 000000000000..24debac646a9
--- /dev/null
+++ b/drivers/spi/xilinx_spi_pltfm.c
@@ -0,0 +1,102 @@
1/*
2 * Support for Xilinx SPI platform devices
3 * Copyright (c) 2009 Intel Corporation
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18
19/* Supports:
20 * Xilinx SPI devices as platform devices
21 *
22 * Inspired by xilinx_spi.c, 2002-2007 (c) MontaVista Software, Inc.
23 */
24
25#include <linux/module.h>
26#include <linux/init.h>
27#include <linux/interrupt.h>
28#include <linux/io.h>
29#include <linux/platform_device.h>
30
31#include <linux/spi/spi.h>
32#include <linux/spi/spi_bitbang.h>
33#include <linux/spi/xilinx_spi.h>
34
35#include "xilinx_spi.h"
36
37static int __devinit xilinx_spi_probe(struct platform_device *dev)
38{
39 struct xspi_platform_data *pdata;
40 struct resource *r;
41 int irq;
42 struct spi_master *master;
43 u8 i;
44
45 pdata = dev->dev.platform_data;
46 if (!pdata)
47 return -ENODEV;
48
49 r = platform_get_resource(dev, IORESOURCE_MEM, 0);
50 if (!r)
51 return -ENODEV;
52
53 irq = platform_get_irq(dev, 0);
54 if (irq < 0)
55 return -ENXIO;
56
57 master = xilinx_spi_init(&dev->dev, r, irq, dev->id);
58 if (!master)
59 return -ENODEV;
60
61 for (i = 0; i < pdata->num_devices; i++)
62 spi_new_device(master, pdata->devices + i);
63
64 platform_set_drvdata(dev, master);
65 return 0;
66}
67
68static int __devexit xilinx_spi_remove(struct platform_device *dev)
69{
70 xilinx_spi_deinit(platform_get_drvdata(dev));
71 platform_set_drvdata(dev, 0);
72
73 return 0;
74}
75
76/* work with hotplug and coldplug */
77MODULE_ALIAS("platform:" XILINX_SPI_NAME);
78
79static struct platform_driver xilinx_spi_driver = {
80 .probe = xilinx_spi_probe,
81 .remove = __devexit_p(xilinx_spi_remove),
82 .driver = {
83 .name = XILINX_SPI_NAME,
84 .owner = THIS_MODULE,
85 },
86};
87
88static int __init xilinx_spi_pltfm_init(void)
89{
90 return platform_driver_register(&xilinx_spi_driver);
91}
92module_init(xilinx_spi_pltfm_init);
93
94static void __exit xilinx_spi_pltfm_exit(void)
95{
96 platform_driver_unregister(&xilinx_spi_driver);
97}
98module_exit(xilinx_spi_pltfm_exit);
99
100MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
101MODULE_DESCRIPTION("Xilinx SPI platform driver");
102MODULE_LICENSE("GPL v2");
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-15 23:35:38 -0500