aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/spi
diff options
context:
space:
mode:
authorTony Lindgren <tony@atomide.com>2010-03-01 17:19:05 -0500
committerTony Lindgren <tony@atomide.com>2010-03-01 17:19:05 -0500
commitd702d12167a2c05a346f49aac7a311d597762495 (patch)
treebaae42c299cce34d6df24b5d01f8b1d0b481bd9a /drivers/spi
parent9418c65f9bd861d0f7e39aab9cfb3aa6f2275d11 (diff)
parentac0f6f927db539e03e1f3f61bcd4ed57d5cde7a9 (diff)
Merge with mainline to remove plat-omap/Kconfig conflict
Conflicts: arch/arm/plat-omap/Kconfig
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/Kconfig23
-rw-r--r--drivers/spi/Makefile3
-rw-r--r--drivers/spi/amba-pl022.c18
-rw-r--r--drivers/spi/au1550_spi.c6
-rw-r--r--drivers/spi/coldfire_qspi.c640
-rw-r--r--drivers/spi/davinci_spi.c1255
-rw-r--r--drivers/spi/dw_spi.c111
-rw-r--r--drivers/spi/dw_spi_mmio.c147
-rw-r--r--drivers/spi/dw_spi_pci.c2
-rw-r--r--drivers/spi/mpc52xx_psc_spi.c2
-rw-r--r--drivers/spi/mpc52xx_spi.c2
-rw-r--r--drivers/spi/spi_imx.c2
-rw-r--r--drivers/spi/spi_mpc8xxx.c8
-rw-r--r--drivers/spi/spi_ppc4xx.c2
-rw-r--r--drivers/spi/spi_s3c64xx.c89
-rw-r--r--drivers/spi/spi_sh_msiof.c2
-rw-r--r--drivers/spi/spi_stmp.c2
-rw-r--r--drivers/spi/xilinx_spi.c28
-rw-r--r--drivers/spi/xilinx_spi_of.c2
19 files changed, 2236 insertions, 108 deletions
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 66c35d74a76b..a191fa2be7c5 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -100,6 +100,23 @@ config SPI_BUTTERFLY
100 inexpensive battery powered microcontroller evaluation board. 100 inexpensive battery powered microcontroller evaluation board.
101 This same cable can be used to flash new firmware. 101 This same cable can be used to flash new firmware.
102 102
103config SPI_COLDFIRE_QSPI
104 tristate "Freescale Coldfire QSPI controller"
105 depends on (M520x || M523x || M5249 || M527x || M528x || M532x)
106 help
107 This enables support for the Coldfire QSPI controller in master
108 mode.
109
110 This driver can also be built as a module. If so, the module
111 will be called coldfire_qspi.
112
113config SPI_DAVINCI
114 tristate "SPI controller driver for DaVinci/DA8xx SoC's"
115 depends on SPI_MASTER && ARCH_DAVINCI
116 select SPI_BITBANG
117 help
118 SPI master controller for DaVinci and DA8xx SPI modules.
119
103config SPI_GPIO 120config SPI_GPIO
104 tristate "GPIO-based bitbanging SPI Master" 121 tristate "GPIO-based bitbanging SPI Master"
105 depends on GENERIC_GPIO 122 depends on GENERIC_GPIO
@@ -308,7 +325,7 @@ config SPI_NUC900
308# 325#
309 326
310config SPI_DESIGNWARE 327config SPI_DESIGNWARE
311 bool "DesignWare SPI controller core support" 328 tristate "DesignWare SPI controller core support"
312 depends on SPI_MASTER 329 depends on SPI_MASTER
313 help 330 help
314 general driver for SPI controller core from DesignWare 331 general driver for SPI controller core from DesignWare
@@ -317,6 +334,10 @@ config SPI_DW_PCI
317 tristate "PCI interface driver for DW SPI core" 334 tristate "PCI interface driver for DW SPI core"
318 depends on SPI_DESIGNWARE && PCI 335 depends on SPI_DESIGNWARE && PCI
319 336
337config SPI_DW_MMIO
338 tristate "Memory-mapped io interface driver for DW SPI core"
339 depends on SPI_DESIGNWARE && HAVE_CLK
340
320# 341#
321# There are lots of SPI device types, with sensors and memory 342# There are lots of SPI device types, with sensors and memory
322# being probably the most widely used ones. 343# being probably the most widely used ones.
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index f3d2810ba11c..d7d0f89b797b 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -16,8 +16,11 @@ obj-$(CONFIG_SPI_BFIN) += spi_bfin5xx.o
16obj-$(CONFIG_SPI_BITBANG) += spi_bitbang.o 16obj-$(CONFIG_SPI_BITBANG) += spi_bitbang.o
17obj-$(CONFIG_SPI_AU1550) += au1550_spi.o 17obj-$(CONFIG_SPI_AU1550) += au1550_spi.o
18obj-$(CONFIG_SPI_BUTTERFLY) += spi_butterfly.o 18obj-$(CONFIG_SPI_BUTTERFLY) += spi_butterfly.o
19obj-$(CONFIG_SPI_COLDFIRE_QSPI) += coldfire_qspi.o
20obj-$(CONFIG_SPI_DAVINCI) += davinci_spi.o
19obj-$(CONFIG_SPI_DESIGNWARE) += dw_spi.o 21obj-$(CONFIG_SPI_DESIGNWARE) += dw_spi.o
20obj-$(CONFIG_SPI_DW_PCI) += dw_spi_pci.o 22obj-$(CONFIG_SPI_DW_PCI) += dw_spi_pci.o
23obj-$(CONFIG_SPI_DW_MMIO) += dw_spi_mmio.o
21obj-$(CONFIG_SPI_GPIO) += spi_gpio.o 24obj-$(CONFIG_SPI_GPIO) += spi_gpio.o
22obj-$(CONFIG_SPI_IMX) += spi_imx.o 25obj-$(CONFIG_SPI_IMX) += spi_imx.o
23obj-$(CONFIG_SPI_LM70_LLP) += spi_lm70llp.o 26obj-$(CONFIG_SPI_LM70_LLP) += spi_lm70llp.o
diff --git a/drivers/spi/amba-pl022.c b/drivers/spi/amba-pl022.c
index ff5bbb9c43c9..9aeb68113100 100644
--- a/drivers/spi/amba-pl022.c
+++ b/drivers/spi/amba-pl022.c
@@ -363,6 +363,7 @@ struct pl022 {
363 void *rx_end; 363 void *rx_end;
364 enum ssp_reading read; 364 enum ssp_reading read;
365 enum ssp_writing write; 365 enum ssp_writing write;
366 u32 exp_fifo_level;
366}; 367};
367 368
368/** 369/**
@@ -501,6 +502,9 @@ static int flush(struct pl022 *pl022)
501 while (readw(SSP_SR(pl022->virtbase)) & SSP_SR_MASK_RNE) 502 while (readw(SSP_SR(pl022->virtbase)) & SSP_SR_MASK_RNE)
502 readw(SSP_DR(pl022->virtbase)); 503 readw(SSP_DR(pl022->virtbase));
503 } while ((readw(SSP_SR(pl022->virtbase)) & SSP_SR_MASK_BSY) && limit--); 504 } while ((readw(SSP_SR(pl022->virtbase)) & SSP_SR_MASK_BSY) && limit--);
505
506 pl022->exp_fifo_level = 0;
507
504 return limit; 508 return limit;
505} 509}
506 510
@@ -583,10 +587,9 @@ static void readwriter(struct pl022 *pl022)
583 * errons in 8bit wide transfers on ARM variants (just 8 words 587 * errons in 8bit wide transfers on ARM variants (just 8 words
584 * FIFO, means only 8x8 = 64 bits in FIFO) at least. 588 * FIFO, means only 8x8 = 64 bits in FIFO) at least.
585 * 589 *
586 * FIXME: currently we have no logic to account for this. 590 * To prevent this issue, the TX FIFO is only filled to the
587 * perhaps there is even something broken in HW regarding 591 * unused RX FIFO fill length, regardless of what the TX
588 * 8bit transfers (it doesn't fail on 16bit) so this needs 592 * FIFO status flag indicates.
589 * more investigation...
590 */ 593 */
591 dev_dbg(&pl022->adev->dev, 594 dev_dbg(&pl022->adev->dev,
592 "%s, rx: %p, rxend: %p, tx: %p, txend: %p\n", 595 "%s, rx: %p, rxend: %p, tx: %p, txend: %p\n",
@@ -613,11 +616,12 @@ static void readwriter(struct pl022 *pl022)
613 break; 616 break;
614 } 617 }
615 pl022->rx += (pl022->cur_chip->n_bytes); 618 pl022->rx += (pl022->cur_chip->n_bytes);
619 pl022->exp_fifo_level--;
616 } 620 }
617 /* 621 /*
618 * Write as much as you can, while keeping an eye on the RX FIFO! 622 * Write as much as possible up to the RX FIFO size
619 */ 623 */
620 while ((readw(SSP_SR(pl022->virtbase)) & SSP_SR_MASK_TNF) 624 while ((pl022->exp_fifo_level < pl022->vendor->fifodepth)
621 && (pl022->tx < pl022->tx_end)) { 625 && (pl022->tx < pl022->tx_end)) {
622 switch (pl022->write) { 626 switch (pl022->write) {
623 case WRITING_NULL: 627 case WRITING_NULL:
@@ -634,6 +638,7 @@ static void readwriter(struct pl022 *pl022)
634 break; 638 break;
635 } 639 }
636 pl022->tx += (pl022->cur_chip->n_bytes); 640 pl022->tx += (pl022->cur_chip->n_bytes);
641 pl022->exp_fifo_level++;
637 /* 642 /*
638 * This inner reader takes care of things appearing in the RX 643 * This inner reader takes care of things appearing in the RX
639 * FIFO as we're transmitting. This will happen a lot since the 644 * FIFO as we're transmitting. This will happen a lot since the
@@ -660,6 +665,7 @@ static void readwriter(struct pl022 *pl022)
660 break; 665 break;
661 } 666 }
662 pl022->rx += (pl022->cur_chip->n_bytes); 667 pl022->rx += (pl022->cur_chip->n_bytes);
668 pl022->exp_fifo_level--;
663 } 669 }
664 } 670 }
665 /* 671 /*
diff --git a/drivers/spi/au1550_spi.c b/drivers/spi/au1550_spi.c
index cfd5ff9508fa..ba8ac4f599d3 100644
--- a/drivers/spi/au1550_spi.c
+++ b/drivers/spi/au1550_spi.c
@@ -412,11 +412,13 @@ static int au1550_spi_dma_txrxb(struct spi_device *spi, struct spi_transfer *t)
412 } 412 }
413 413
414 /* put buffers on the ring */ 414 /* put buffers on the ring */
415 res = au1xxx_dbdma_put_dest(hw->dma_rx_ch, hw->rx, t->len); 415 res = au1xxx_dbdma_put_dest(hw->dma_rx_ch, virt_to_phys(hw->rx),
416 t->len, DDMA_FLAGS_IE);
416 if (!res) 417 if (!res)
417 dev_err(hw->dev, "rx dma put dest error\n"); 418 dev_err(hw->dev, "rx dma put dest error\n");
418 419
419 res = au1xxx_dbdma_put_source(hw->dma_tx_ch, (void *)hw->tx, t->len); 420 res = au1xxx_dbdma_put_source(hw->dma_tx_ch, virt_to_phys(hw->tx),
421 t->len, DDMA_FLAGS_IE);
420 if (!res) 422 if (!res)
421 dev_err(hw->dev, "tx dma put source error\n"); 423 dev_err(hw->dev, "tx dma put source error\n");
422 424
diff --git a/drivers/spi/coldfire_qspi.c b/drivers/spi/coldfire_qspi.c
new file mode 100644
index 000000000000..59be3efe0636
--- /dev/null
+++ b/drivers/spi/coldfire_qspi.c
@@ -0,0 +1,640 @@
1/*
2 * Freescale/Motorola Coldfire Queued SPI driver
3 *
4 * Copyright 2010 Steven King <sfking@fdwdc.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 as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA
19 *
20*/
21
22#include <linux/kernel.h>
23#include <linux/module.h>
24#include <linux/interrupt.h>
25#include <linux/errno.h>
26#include <linux/platform_device.h>
27#include <linux/workqueue.h>
28#include <linux/delay.h>
29#include <linux/io.h>
30#include <linux/clk.h>
31#include <linux/err.h>
32#include <linux/spi/spi.h>
33
34#include <asm/coldfire.h>
35#include <asm/mcfqspi.h>
36
37#define DRIVER_NAME "mcfqspi"
38
39#define MCFQSPI_BUSCLK (MCF_BUSCLK / 2)
40
41#define MCFQSPI_QMR 0x00
42#define MCFQSPI_QMR_MSTR 0x8000
43#define MCFQSPI_QMR_CPOL 0x0200
44#define MCFQSPI_QMR_CPHA 0x0100
45#define MCFQSPI_QDLYR 0x04
46#define MCFQSPI_QDLYR_SPE 0x8000
47#define MCFQSPI_QWR 0x08
48#define MCFQSPI_QWR_HALT 0x8000
49#define MCFQSPI_QWR_WREN 0x4000
50#define MCFQSPI_QWR_CSIV 0x1000
51#define MCFQSPI_QIR 0x0C
52#define MCFQSPI_QIR_WCEFB 0x8000
53#define MCFQSPI_QIR_ABRTB 0x4000
54#define MCFQSPI_QIR_ABRTL 0x1000
55#define MCFQSPI_QIR_WCEFE 0x0800
56#define MCFQSPI_QIR_ABRTE 0x0400
57#define MCFQSPI_QIR_SPIFE 0x0100
58#define MCFQSPI_QIR_WCEF 0x0008
59#define MCFQSPI_QIR_ABRT 0x0004
60#define MCFQSPI_QIR_SPIF 0x0001
61#define MCFQSPI_QAR 0x010
62#define MCFQSPI_QAR_TXBUF 0x00
63#define MCFQSPI_QAR_RXBUF 0x10
64#define MCFQSPI_QAR_CMDBUF 0x20
65#define MCFQSPI_QDR 0x014
66#define MCFQSPI_QCR 0x014
67#define MCFQSPI_QCR_CONT 0x8000
68#define MCFQSPI_QCR_BITSE 0x4000
69#define MCFQSPI_QCR_DT 0x2000
70
71struct mcfqspi {
72 void __iomem *iobase;
73 int irq;
74 struct clk *clk;
75 struct mcfqspi_cs_control *cs_control;
76
77 wait_queue_head_t waitq;
78
79 struct work_struct work;
80 struct workqueue_struct *workq;
81 spinlock_t lock;
82 struct list_head msgq;
83};
84
85static void mcfqspi_wr_qmr(struct mcfqspi *mcfqspi, u16 val)
86{
87 writew(val, mcfqspi->iobase + MCFQSPI_QMR);
88}
89
90static void mcfqspi_wr_qdlyr(struct mcfqspi *mcfqspi, u16 val)
91{
92 writew(val, mcfqspi->iobase + MCFQSPI_QDLYR);
93}
94
95static u16 mcfqspi_rd_qdlyr(struct mcfqspi *mcfqspi)
96{
97 return readw(mcfqspi->iobase + MCFQSPI_QDLYR);
98}
99
100static void mcfqspi_wr_qwr(struct mcfqspi *mcfqspi, u16 val)
101{
102 writew(val, mcfqspi->iobase + MCFQSPI_QWR);
103}
104
105static void mcfqspi_wr_qir(struct mcfqspi *mcfqspi, u16 val)
106{
107 writew(val, mcfqspi->iobase + MCFQSPI_QIR);
108}
109
110static void mcfqspi_wr_qar(struct mcfqspi *mcfqspi, u16 val)
111{
112 writew(val, mcfqspi->iobase + MCFQSPI_QAR);
113}
114
115static void mcfqspi_wr_qdr(struct mcfqspi *mcfqspi, u16 val)
116{
117 writew(val, mcfqspi->iobase + MCFQSPI_QDR);
118}
119
120static u16 mcfqspi_rd_qdr(struct mcfqspi *mcfqspi)
121{
122 return readw(mcfqspi->iobase + MCFQSPI_QDR);
123}
124
125static void mcfqspi_cs_select(struct mcfqspi *mcfqspi, u8 chip_select,
126 bool cs_high)
127{
128 mcfqspi->cs_control->select(mcfqspi->cs_control, chip_select, cs_high);
129}
130
131static void mcfqspi_cs_deselect(struct mcfqspi *mcfqspi, u8 chip_select,
132 bool cs_high)
133{
134 mcfqspi->cs_control->deselect(mcfqspi->cs_control, chip_select, cs_high);
135}
136
137static int mcfqspi_cs_setup(struct mcfqspi *mcfqspi)
138{
139 return (mcfqspi->cs_control && mcfqspi->cs_control->setup) ?
140 mcfqspi->cs_control->setup(mcfqspi->cs_control) : 0;
141}
142
143static void mcfqspi_cs_teardown(struct mcfqspi *mcfqspi)
144{
145 if (mcfqspi->cs_control && mcfqspi->cs_control->teardown)
146 mcfqspi->cs_control->teardown(mcfqspi->cs_control);
147}
148
149static u8 mcfqspi_qmr_baud(u32 speed_hz)
150{
151 return clamp((MCFQSPI_BUSCLK + speed_hz - 1) / speed_hz, 2u, 255u);
152}
153
154static bool mcfqspi_qdlyr_spe(struct mcfqspi *mcfqspi)
155{
156 return mcfqspi_rd_qdlyr(mcfqspi) & MCFQSPI_QDLYR_SPE;
157}
158
159static irqreturn_t mcfqspi_irq_handler(int this_irq, void *dev_id)
160{
161 struct mcfqspi *mcfqspi = dev_id;
162
163 /* clear interrupt */
164 mcfqspi_wr_qir(mcfqspi, MCFQSPI_QIR_SPIFE | MCFQSPI_QIR_SPIF);
165 wake_up(&mcfqspi->waitq);
166
167 return IRQ_HANDLED;
168}
169
170static void mcfqspi_transfer_msg8(struct mcfqspi *mcfqspi, unsigned count,
171 const u8 *txbuf, u8 *rxbuf)
172{
173 unsigned i, n, offset = 0;
174
175 n = min(count, 16u);
176
177 mcfqspi_wr_qar(mcfqspi, MCFQSPI_QAR_CMDBUF);
178 for (i = 0; i < n; ++i)
179 mcfqspi_wr_qdr(mcfqspi, MCFQSPI_QCR_BITSE);
180
181 mcfqspi_wr_qar(mcfqspi, MCFQSPI_QAR_TXBUF);
182 if (txbuf)
183 for (i = 0; i < n; ++i)
184 mcfqspi_wr_qdr(mcfqspi, *txbuf++);
185 else
186 for (i = 0; i < count; ++i)
187 mcfqspi_wr_qdr(mcfqspi, 0);
188
189 count -= n;
190 if (count) {
191 u16 qwr = 0xf08;
192 mcfqspi_wr_qwr(mcfqspi, 0x700);
193 mcfqspi_wr_qdlyr(mcfqspi, MCFQSPI_QDLYR_SPE);
194
195 do {
196 wait_event(mcfqspi->waitq, !mcfqspi_qdlyr_spe(mcfqspi));
197 mcfqspi_wr_qwr(mcfqspi, qwr);
198 mcfqspi_wr_qdlyr(mcfqspi, MCFQSPI_QDLYR_SPE);
199 if (rxbuf) {
200 mcfqspi_wr_qar(mcfqspi,
201 MCFQSPI_QAR_RXBUF + offset);
202 for (i = 0; i < 8; ++i)
203 *rxbuf++ = mcfqspi_rd_qdr(mcfqspi);
204 }
205 n = min(count, 8u);
206 if (txbuf) {
207 mcfqspi_wr_qar(mcfqspi,
208 MCFQSPI_QAR_TXBUF + offset);
209 for (i = 0; i < n; ++i)
210 mcfqspi_wr_qdr(mcfqspi, *txbuf++);
211 }
212 qwr = (offset ? 0x808 : 0) + ((n - 1) << 8);
213 offset ^= 8;
214 count -= n;
215 } while (count);
216 wait_event(mcfqspi->waitq, !mcfqspi_qdlyr_spe(mcfqspi));
217 mcfqspi_wr_qwr(mcfqspi, qwr);
218 mcfqspi_wr_qdlyr(mcfqspi, MCFQSPI_QDLYR_SPE);
219 if (rxbuf) {
220 mcfqspi_wr_qar(mcfqspi, MCFQSPI_QAR_RXBUF + offset);
221 for (i = 0; i < 8; ++i)
222 *rxbuf++ = mcfqspi_rd_qdr(mcfqspi);
223 offset ^= 8;
224 }
225 } else {
226 mcfqspi_wr_qwr(mcfqspi, (n - 1) << 8);
227 mcfqspi_wr_qdlyr(mcfqspi, MCFQSPI_QDLYR_SPE);
228 }
229 wait_event(mcfqspi->waitq, !mcfqspi_qdlyr_spe(mcfqspi));
230 if (rxbuf) {
231 mcfqspi_wr_qar(mcfqspi, MCFQSPI_QAR_RXBUF + offset);
232 for (i = 0; i < n; ++i)
233 *rxbuf++ = mcfqspi_rd_qdr(mcfqspi);
234 }
235}
236
237static void mcfqspi_transfer_msg16(struct mcfqspi *mcfqspi, unsigned count,
238 const u16 *txbuf, u16 *rxbuf)
239{
240 unsigned i, n, offset = 0;
241
242 n = min(count, 16u);
243
244 mcfqspi_wr_qar(mcfqspi, MCFQSPI_QAR_CMDBUF);
245 for (i = 0; i < n; ++i)
246 mcfqspi_wr_qdr(mcfqspi, MCFQSPI_QCR_BITSE);
247
248 mcfqspi_wr_qar(mcfqspi, MCFQSPI_QAR_TXBUF);
249 if (txbuf)
250 for (i = 0; i < n; ++i)
251 mcfqspi_wr_qdr(mcfqspi, *txbuf++);
252 else
253 for (i = 0; i < count; ++i)
254 mcfqspi_wr_qdr(mcfqspi, 0);
255
256 count -= n;
257 if (count) {
258 u16 qwr = 0xf08;
259 mcfqspi_wr_qwr(mcfqspi, 0x700);
260 mcfqspi_wr_qdlyr(mcfqspi, MCFQSPI_QDLYR_SPE);
261
262 do {
263 wait_event(mcfqspi->waitq, !mcfqspi_qdlyr_spe(mcfqspi));
264 mcfqspi_wr_qwr(mcfqspi, qwr);
265 mcfqspi_wr_qdlyr(mcfqspi, MCFQSPI_QDLYR_SPE);
266 if (rxbuf) {
267 mcfqspi_wr_qar(mcfqspi,
268 MCFQSPI_QAR_RXBUF + offset);
269 for (i = 0; i < 8; ++i)
270 *rxbuf++ = mcfqspi_rd_qdr(mcfqspi);
271 }
272 n = min(count, 8u);
273 if (txbuf) {
274 mcfqspi_wr_qar(mcfqspi,
275 MCFQSPI_QAR_TXBUF + offset);
276 for (i = 0; i < n; ++i)
277 mcfqspi_wr_qdr(mcfqspi, *txbuf++);
278 }
279 qwr = (offset ? 0x808 : 0x000) + ((n - 1) << 8);
280 offset ^= 8;
281 count -= n;
282 } while (count);
283 wait_event(mcfqspi->waitq, !mcfqspi_qdlyr_spe(mcfqspi));
284 mcfqspi_wr_qwr(mcfqspi, qwr);
285 mcfqspi_wr_qdlyr(mcfqspi, MCFQSPI_QDLYR_SPE);
286 if (rxbuf) {
287 mcfqspi_wr_qar(mcfqspi, MCFQSPI_QAR_RXBUF + offset);
288 for (i = 0; i < 8; ++i)
289 *rxbuf++ = mcfqspi_rd_qdr(mcfqspi);
290 offset ^= 8;
291 }
292 } else {
293 mcfqspi_wr_qwr(mcfqspi, (n - 1) << 8);
294 mcfqspi_wr_qdlyr(mcfqspi, MCFQSPI_QDLYR_SPE);
295 }
296 wait_event(mcfqspi->waitq, !mcfqspi_qdlyr_spe(mcfqspi));
297 if (rxbuf) {
298 mcfqspi_wr_qar(mcfqspi, MCFQSPI_QAR_RXBUF + offset);
299 for (i = 0; i < n; ++i)
300 *rxbuf++ = mcfqspi_rd_qdr(mcfqspi);
301 }
302}
303
304static void mcfqspi_work(struct work_struct *work)
305{
306 struct mcfqspi *mcfqspi = container_of(work, struct mcfqspi, work);
307 unsigned long flags;
308
309 spin_lock_irqsave(&mcfqspi->lock, flags);
310 while (!list_empty(&mcfqspi->msgq)) {
311 struct spi_message *msg;
312 struct spi_device *spi;
313 struct spi_transfer *xfer;
314 int status = 0;
315
316 msg = container_of(mcfqspi->msgq.next, struct spi_message,
317 queue);
318
319 list_del_init(&mcfqspi->msgq);
320 spin_unlock_irqrestore(&mcfqspi->lock, flags);
321
322 spi = msg->spi;
323
324 list_for_each_entry(xfer, &msg->transfers, transfer_list) {
325 bool cs_high = spi->mode & SPI_CS_HIGH;
326 u16 qmr = MCFQSPI_QMR_MSTR;
327
328 if (xfer->bits_per_word)
329 qmr |= xfer->bits_per_word << 10;
330 else
331 qmr |= spi->bits_per_word << 10;
332 if (spi->mode & SPI_CPHA)
333 qmr |= MCFQSPI_QMR_CPHA;
334 if (spi->mode & SPI_CPOL)
335 qmr |= MCFQSPI_QMR_CPOL;
336 if (xfer->speed_hz)
337 qmr |= mcfqspi_qmr_baud(xfer->speed_hz);
338 else
339 qmr |= mcfqspi_qmr_baud(spi->max_speed_hz);
340 mcfqspi_wr_qmr(mcfqspi, qmr);
341
342 mcfqspi_cs_select(mcfqspi, spi->chip_select, cs_high);
343
344 mcfqspi_wr_qir(mcfqspi, MCFQSPI_QIR_SPIFE);
345 if ((xfer->bits_per_word ? xfer->bits_per_word :
346 spi->bits_per_word) == 8)
347 mcfqspi_transfer_msg8(mcfqspi, xfer->len,
348 xfer->tx_buf,
349 xfer->rx_buf);
350 else
351 mcfqspi_transfer_msg16(mcfqspi, xfer->len / 2,
352 xfer->tx_buf,
353 xfer->rx_buf);
354 mcfqspi_wr_qir(mcfqspi, 0);
355
356 if (xfer->delay_usecs)
357 udelay(xfer->delay_usecs);
358 if (xfer->cs_change) {
359 if (!list_is_last(&xfer->transfer_list,
360 &msg->transfers))
361 mcfqspi_cs_deselect(mcfqspi,
362 spi->chip_select,
363 cs_high);
364 } else {
365 if (list_is_last(&xfer->transfer_list,
366 &msg->transfers))
367 mcfqspi_cs_deselect(mcfqspi,
368 spi->chip_select,
369 cs_high);
370 }
371 msg->actual_length += xfer->len;
372 }
373 msg->status = status;
374 msg->complete(msg->context);
375
376 spin_lock_irqsave(&mcfqspi->lock, flags);
377 }
378 spin_unlock_irqrestore(&mcfqspi->lock, flags);
379}
380
381static int mcfqspi_transfer(struct spi_device *spi, struct spi_message *msg)
382{
383 struct mcfqspi *mcfqspi;
384 struct spi_transfer *xfer;
385 unsigned long flags;
386
387 mcfqspi = spi_master_get_devdata(spi->master);
388
389 list_for_each_entry(xfer, &msg->transfers, transfer_list) {
390 if (xfer->bits_per_word && ((xfer->bits_per_word < 8)
391 || (xfer->bits_per_word > 16))) {
392 dev_dbg(&spi->dev,
393 "%d bits per word is not supported\n",
394 xfer->bits_per_word);
395 goto fail;
396 }
397 if (xfer->speed_hz) {
398 u32 real_speed = MCFQSPI_BUSCLK /
399 mcfqspi_qmr_baud(xfer->speed_hz);
400 if (real_speed != xfer->speed_hz)
401 dev_dbg(&spi->dev,
402 "using speed %d instead of %d\n",
403 real_speed, xfer->speed_hz);
404 }
405 }
406 msg->status = -EINPROGRESS;
407 msg->actual_length = 0;
408
409 spin_lock_irqsave(&mcfqspi->lock, flags);
410 list_add_tail(&msg->queue, &mcfqspi->msgq);
411 queue_work(mcfqspi->workq, &mcfqspi->work);
412 spin_unlock_irqrestore(&mcfqspi->lock, flags);
413
414 return 0;
415fail:
416 msg->status = -EINVAL;
417 return -EINVAL;
418}
419
420static int mcfqspi_setup(struct spi_device *spi)
421{
422 if ((spi->bits_per_word < 8) || (spi->bits_per_word > 16)) {
423 dev_dbg(&spi->dev, "%d bits per word is not supported\n",
424 spi->bits_per_word);
425 return -EINVAL;
426 }
427 if (spi->chip_select >= spi->master->num_chipselect) {
428 dev_dbg(&spi->dev, "%d chip select is out of range\n",
429 spi->chip_select);
430 return -EINVAL;
431 }
432
433 mcfqspi_cs_deselect(spi_master_get_devdata(spi->master),
434 spi->chip_select, spi->mode & SPI_CS_HIGH);
435
436 dev_dbg(&spi->dev,
437 "bits per word %d, chip select %d, speed %d KHz\n",
438 spi->bits_per_word, spi->chip_select,
439 (MCFQSPI_BUSCLK / mcfqspi_qmr_baud(spi->max_speed_hz))
440 / 1000);
441
442 return 0;
443}
444
445static int __devinit mcfqspi_probe(struct platform_device *pdev)
446{
447 struct spi_master *master;
448 struct mcfqspi *mcfqspi;
449 struct resource *res;
450 struct mcfqspi_platform_data *pdata;
451 int status;
452
453 master = spi_alloc_master(&pdev->dev, sizeof(*mcfqspi));
454 if (master == NULL) {
455 dev_dbg(&pdev->dev, "spi_alloc_master failed\n");
456 return -ENOMEM;
457 }
458
459 mcfqspi = spi_master_get_devdata(master);
460
461 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
462 if (!res) {
463 dev_dbg(&pdev->dev, "platform_get_resource failed\n");
464 status = -ENXIO;
465 goto fail0;
466 }
467
468 if (!request_mem_region(res->start, resource_size(res), pdev->name)) {
469 dev_dbg(&pdev->dev, "request_mem_region failed\n");
470 status = -EBUSY;
471 goto fail0;
472 }
473
474 mcfqspi->iobase = ioremap(res->start, resource_size(res));
475 if (!mcfqspi->iobase) {
476 dev_dbg(&pdev->dev, "ioremap failed\n");
477 status = -ENOMEM;
478 goto fail1;
479 }
480
481 mcfqspi->irq = platform_get_irq(pdev, 0);
482 if (mcfqspi->irq < 0) {
483 dev_dbg(&pdev->dev, "platform_get_irq failed\n");
484 status = -ENXIO;
485 goto fail2;
486 }
487
488 status = request_irq(mcfqspi->irq, mcfqspi_irq_handler, IRQF_DISABLED,
489 pdev->name, mcfqspi);
490 if (status) {
491 dev_dbg(&pdev->dev, "request_irq failed\n");
492 goto fail2;
493 }
494
495 mcfqspi->clk = clk_get(&pdev->dev, "qspi_clk");
496 if (IS_ERR(mcfqspi->clk)) {
497 dev_dbg(&pdev->dev, "clk_get failed\n");
498 status = PTR_ERR(mcfqspi->clk);
499 goto fail3;
500 }
501 clk_enable(mcfqspi->clk);
502
503 mcfqspi->workq = create_singlethread_workqueue(dev_name(master->dev.parent));
504 if (!mcfqspi->workq) {
505 dev_dbg(&pdev->dev, "create_workqueue failed\n");
506 status = -ENOMEM;
507 goto fail4;
508 }
509 INIT_WORK(&mcfqspi->work, mcfqspi_work);
510 spin_lock_init(&mcfqspi->lock);
511 INIT_LIST_HEAD(&mcfqspi->msgq);
512 init_waitqueue_head(&mcfqspi->waitq);
513
514 pdata = pdev->dev.platform_data;
515 if (!pdata) {
516 dev_dbg(&pdev->dev, "platform data is missing\n");
517 goto fail5;
518 }
519 master->bus_num = pdata->bus_num;
520 master->num_chipselect = pdata->num_chipselect;
521
522 mcfqspi->cs_control = pdata->cs_control;
523 status = mcfqspi_cs_setup(mcfqspi);
524 if (status) {
525 dev_dbg(&pdev->dev, "error initializing cs_control\n");
526 goto fail5;
527 }
528
529 master->mode_bits = SPI_CS_HIGH | SPI_CPOL | SPI_CPHA;
530 master->setup = mcfqspi_setup;
531 master->transfer = mcfqspi_transfer;
532
533 platform_set_drvdata(pdev, master);
534
535 status = spi_register_master(master);
536 if (status) {
537 dev_dbg(&pdev->dev, "spi_register_master failed\n");
538 goto fail6;
539 }
540 dev_info(&pdev->dev, "Coldfire QSPI bus driver\n");
541
542 return 0;
543
544fail6:
545 mcfqspi_cs_teardown(mcfqspi);
546fail5:
547 destroy_workqueue(mcfqspi->workq);
548fail4:
549 clk_disable(mcfqspi->clk);
550 clk_put(mcfqspi->clk);
551fail3:
552 free_irq(mcfqspi->irq, mcfqspi);
553fail2:
554 iounmap(mcfqspi->iobase);
555fail1:
556 release_mem_region(res->start, resource_size(res));
557fail0:
558 spi_master_put(master);
559
560 dev_dbg(&pdev->dev, "Coldfire QSPI probe failed\n");
561
562 return status;
563}
564
565static int __devexit mcfqspi_remove(struct platform_device *pdev)
566{
567 struct spi_master *master = platform_get_drvdata(pdev);
568 struct mcfqspi *mcfqspi = spi_master_get_devdata(master);
569 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
570
571 /* disable the hardware (set the baud rate to 0) */
572 mcfqspi_wr_qmr(mcfqspi, MCFQSPI_QMR_MSTR);
573
574 platform_set_drvdata(pdev, NULL);
575 mcfqspi_cs_teardown(mcfqspi);
576 destroy_workqueue(mcfqspi->workq);
577 clk_disable(mcfqspi->clk);
578 clk_put(mcfqspi->clk);
579 free_irq(mcfqspi->irq, mcfqspi);
580 iounmap(mcfqspi->iobase);
581 release_mem_region(res->start, resource_size(res));
582 spi_unregister_master(master);
583 spi_master_put(master);
584
585 return 0;
586}
587
588#ifdef CONFIG_PM
589
590static int mcfqspi_suspend(struct device *dev)
591{
592 struct mcfqspi *mcfqspi = platform_get_drvdata(to_platform_device(dev));
593
594 clk_disable(mcfqspi->clk);
595
596 return 0;
597}
598
599static int mcfqspi_resume(struct device *dev)
600{
601 struct mcfqspi *mcfqspi = platform_get_drvdata(to_platform_device(dev));
602
603 clk_enable(mcfqspi->clk);
604
605 return 0;
606}
607
608static struct dev_pm_ops mcfqspi_dev_pm_ops = {
609 .suspend = mcfqspi_suspend,
610 .resume = mcfqspi_resume,
611};
612
613#define MCFQSPI_DEV_PM_OPS (&mcfqspi_dev_pm_ops)
614#else
615#define MCFQSPI_DEV_PM_OPS NULL
616#endif
617
618static struct platform_driver mcfqspi_driver = {
619 .driver.name = DRIVER_NAME,
620 .driver.owner = THIS_MODULE,
621 .driver.pm = MCFQSPI_DEV_PM_OPS,
622 .remove = __devexit_p(mcfqspi_remove),
623};
624
625static int __init mcfqspi_init(void)
626{
627 return platform_driver_probe(&mcfqspi_driver, mcfqspi_probe);
628}
629module_init(mcfqspi_init);
630
631static void __exit mcfqspi_exit(void)
632{
633 platform_driver_unregister(&mcfqspi_driver);
634}
635module_exit(mcfqspi_exit);
636
637MODULE_AUTHOR("Steven King <sfking@fdwdc.com>");
638MODULE_DESCRIPTION("Coldfire QSPI Controller Driver");
639MODULE_LICENSE("GPL");
640MODULE_ALIAS("platform:" DRIVER_NAME);
diff --git a/drivers/spi/davinci_spi.c b/drivers/spi/davinci_spi.c
new file mode 100644
index 000000000000..225ab60b02c4
--- /dev/null
+++ b/drivers/spi/davinci_spi.c
@@ -0,0 +1,1255 @@
1/*
2 * Copyright (C) 2009 Texas Instruments.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 */
18
19#include <linux/interrupt.h>
20#include <linux/io.h>
21#include <linux/gpio.h>
22#include <linux/module.h>
23#include <linux/delay.h>
24#include <linux/platform_device.h>
25#include <linux/err.h>
26#include <linux/clk.h>
27#include <linux/dma-mapping.h>
28#include <linux/spi/spi.h>
29#include <linux/spi/spi_bitbang.h>
30
31#include <mach/spi.h>
32#include <mach/edma.h>
33
34#define SPI_NO_RESOURCE ((resource_size_t)-1)
35
36#define SPI_MAX_CHIPSELECT 2
37
38#define CS_DEFAULT 0xFF
39
40#define SPI_BUFSIZ (SMP_CACHE_BYTES + 1)
41#define DAVINCI_DMA_DATA_TYPE_S8 0x01
42#define DAVINCI_DMA_DATA_TYPE_S16 0x02
43#define DAVINCI_DMA_DATA_TYPE_S32 0x04
44
45#define SPIFMT_PHASE_MASK BIT(16)
46#define SPIFMT_POLARITY_MASK BIT(17)
47#define SPIFMT_DISTIMER_MASK BIT(18)
48#define SPIFMT_SHIFTDIR_MASK BIT(20)
49#define SPIFMT_WAITENA_MASK BIT(21)
50#define SPIFMT_PARITYENA_MASK BIT(22)
51#define SPIFMT_ODD_PARITY_MASK BIT(23)
52#define SPIFMT_WDELAY_MASK 0x3f000000u
53#define SPIFMT_WDELAY_SHIFT 24
54#define SPIFMT_CHARLEN_MASK 0x0000001Fu
55
56/* SPIGCR1 */
57#define SPIGCR1_SPIENA_MASK 0x01000000u
58
59/* SPIPC0 */
60#define SPIPC0_DIFUN_MASK BIT(11) /* MISO */
61#define SPIPC0_DOFUN_MASK BIT(10) /* MOSI */
62#define SPIPC0_CLKFUN_MASK BIT(9) /* CLK */
63#define SPIPC0_SPIENA_MASK BIT(8) /* nREADY */
64#define SPIPC0_EN1FUN_MASK BIT(1)
65#define SPIPC0_EN0FUN_MASK BIT(0)
66
67#define SPIINT_MASKALL 0x0101035F
68#define SPI_INTLVL_1 0x000001FFu
69#define SPI_INTLVL_0 0x00000000u
70
71/* SPIDAT1 */
72#define SPIDAT1_CSHOLD_SHIFT 28
73#define SPIDAT1_CSNR_SHIFT 16
74#define SPIGCR1_CLKMOD_MASK BIT(1)
75#define SPIGCR1_MASTER_MASK BIT(0)
76#define SPIGCR1_LOOPBACK_MASK BIT(16)
77
78/* SPIBUF */
79#define SPIBUF_TXFULL_MASK BIT(29)
80#define SPIBUF_RXEMPTY_MASK BIT(31)
81
82/* Error Masks */
83#define SPIFLG_DLEN_ERR_MASK BIT(0)
84#define SPIFLG_TIMEOUT_MASK BIT(1)
85#define SPIFLG_PARERR_MASK BIT(2)
86#define SPIFLG_DESYNC_MASK BIT(3)
87#define SPIFLG_BITERR_MASK BIT(4)
88#define SPIFLG_OVRRUN_MASK BIT(6)
89#define SPIFLG_RX_INTR_MASK BIT(8)
90#define SPIFLG_TX_INTR_MASK BIT(9)
91#define SPIFLG_BUF_INIT_ACTIVE_MASK BIT(24)
92#define SPIFLG_MASK (SPIFLG_DLEN_ERR_MASK \
93 | SPIFLG_TIMEOUT_MASK | SPIFLG_PARERR_MASK \
94 | SPIFLG_DESYNC_MASK | SPIFLG_BITERR_MASK \
95 | SPIFLG_OVRRUN_MASK | SPIFLG_RX_INTR_MASK \
96 | SPIFLG_TX_INTR_MASK \
97 | SPIFLG_BUF_INIT_ACTIVE_MASK)
98
99#define SPIINT_DLEN_ERR_INTR BIT(0)
100#define SPIINT_TIMEOUT_INTR BIT(1)
101#define SPIINT_PARERR_INTR BIT(2)
102#define SPIINT_DESYNC_INTR BIT(3)
103#define SPIINT_BITERR_INTR BIT(4)
104#define SPIINT_OVRRUN_INTR BIT(6)
105#define SPIINT_RX_INTR BIT(8)
106#define SPIINT_TX_INTR BIT(9)
107#define SPIINT_DMA_REQ_EN BIT(16)
108#define SPIINT_ENABLE_HIGHZ BIT(24)
109
110#define SPI_T2CDELAY_SHIFT 16
111#define SPI_C2TDELAY_SHIFT 24
112
113/* SPI Controller registers */
114#define SPIGCR0 0x00
115#define SPIGCR1 0x04
116#define SPIINT 0x08
117#define SPILVL 0x0c
118#define SPIFLG 0x10
119#define SPIPC0 0x14
120#define SPIPC1 0x18
121#define SPIPC2 0x1c
122#define SPIPC3 0x20
123#define SPIPC4 0x24
124#define SPIPC5 0x28
125#define SPIPC6 0x2c
126#define SPIPC7 0x30
127#define SPIPC8 0x34
128#define SPIDAT0 0x38
129#define SPIDAT1 0x3c
130#define SPIBUF 0x40
131#define SPIEMU 0x44
132#define SPIDELAY 0x48
133#define SPIDEF 0x4c
134#define SPIFMT0 0x50
135#define SPIFMT1 0x54
136#define SPIFMT2 0x58
137#define SPIFMT3 0x5c
138#define TGINTVEC0 0x60
139#define TGINTVEC1 0x64
140
141struct davinci_spi_slave {
142 u32 cmd_to_write;
143 u32 clk_ctrl_to_write;
144 u32 bytes_per_word;
145 u8 active_cs;
146};
147
148/* We have 2 DMA channels per CS, one for RX and one for TX */
149struct davinci_spi_dma {
150 int dma_tx_channel;
151 int dma_rx_channel;
152 int dma_tx_sync_dev;
153 int dma_rx_sync_dev;
154 enum dma_event_q eventq;
155
156 struct completion dma_tx_completion;
157 struct completion dma_rx_completion;
158};
159
160/* SPI Controller driver's private data. */
161struct davinci_spi {
162 struct spi_bitbang bitbang;
163 struct clk *clk;
164
165 u8 version;
166 resource_size_t pbase;
167 void __iomem *base;
168 size_t region_size;
169 u32 irq;
170 struct completion done;
171
172 const void *tx;
173 void *rx;
174 u8 *tmp_buf;
175 int count;
176 struct davinci_spi_dma *dma_channels;
177 struct davinci_spi_platform_data *pdata;
178
179 void (*get_rx)(u32 rx_data, struct davinci_spi *);
180 u32 (*get_tx)(struct davinci_spi *);
181
182 struct davinci_spi_slave slave[SPI_MAX_CHIPSELECT];
183};
184
185static unsigned use_dma;
186
187static void davinci_spi_rx_buf_u8(u32 data, struct davinci_spi *davinci_spi)
188{
189 u8 *rx = davinci_spi->rx;
190
191 *rx++ = (u8)data;
192 davinci_spi->rx = rx;
193}
194
195static void davinci_spi_rx_buf_u16(u32 data, struct davinci_spi *davinci_spi)
196{
197 u16 *rx = davinci_spi->rx;
198
199 *rx++ = (u16)data;
200 davinci_spi->rx = rx;
201}
202
203static u32 davinci_spi_tx_buf_u8(struct davinci_spi *davinci_spi)
204{
205 u32 data;
206 const u8 *tx = davinci_spi->tx;
207
208 data = *tx++;
209 davinci_spi->tx = tx;
210 return data;
211}
212
213static u32 davinci_spi_tx_buf_u16(struct davinci_spi *davinci_spi)
214{
215 u32 data;
216 const u16 *tx = davinci_spi->tx;
217
218 data = *tx++;
219 davinci_spi->tx = tx;
220 return data;
221}
222
223static inline void set_io_bits(void __iomem *addr, u32 bits)
224{
225 u32 v = ioread32(addr);
226
227 v |= bits;
228 iowrite32(v, addr);
229}
230
231static inline void clear_io_bits(void __iomem *addr, u32 bits)
232{
233 u32 v = ioread32(addr);
234
235 v &= ~bits;
236 iowrite32(v, addr);
237}
238
239static inline void set_fmt_bits(void __iomem *addr, u32 bits, int cs_num)
240{
241 set_io_bits(addr + SPIFMT0 + (0x4 * cs_num), bits);
242}
243
244static inline void clear_fmt_bits(void __iomem *addr, u32 bits, int cs_num)
245{
246 clear_io_bits(addr + SPIFMT0 + (0x4 * cs_num), bits);
247}
248
249static void davinci_spi_set_dma_req(const struct spi_device *spi, int enable)
250{
251 struct davinci_spi *davinci_spi = spi_master_get_devdata(spi->master);
252
253 if (enable)
254 set_io_bits(davinci_spi->base + SPIINT, SPIINT_DMA_REQ_EN);
255 else
256 clear_io_bits(davinci_spi->base + SPIINT, SPIINT_DMA_REQ_EN);
257}
258
259/*
260 * Interface to control the chip select signal
261 */
262static void davinci_spi_chipselect(struct spi_device *spi, int value)
263{
264 struct davinci_spi *davinci_spi;
265 struct davinci_spi_platform_data *pdata;
266 u32 data1_reg_val = 0;
267
268 davinci_spi = spi_master_get_devdata(spi->master);
269 pdata = davinci_spi->pdata;
270
271 /*
272 * Board specific chip select logic decides the polarity and cs
273 * line for the controller
274 */
275 if (value == BITBANG_CS_INACTIVE) {
276 set_io_bits(davinci_spi->base + SPIDEF, CS_DEFAULT);
277
278 data1_reg_val |= CS_DEFAULT << SPIDAT1_CSNR_SHIFT;
279 iowrite32(data1_reg_val, davinci_spi->base + SPIDAT1);
280
281 while ((ioread32(davinci_spi->base + SPIBUF)
282 & SPIBUF_RXEMPTY_MASK) == 0)
283 cpu_relax();
284 }
285}
286
287/**
288 * davinci_spi_setup_transfer - This functions will determine transfer method
289 * @spi: spi device on which data transfer to be done
290 * @t: spi transfer in which transfer info is filled
291 *
292 * This function determines data transfer method (8/16/32 bit transfer).
293 * It will also set the SPI Clock Control register according to
294 * SPI slave device freq.
295 */
296static int davinci_spi_setup_transfer(struct spi_device *spi,
297 struct spi_transfer *t)
298{
299
300 struct davinci_spi *davinci_spi;
301 struct davinci_spi_platform_data *pdata;
302 u8 bits_per_word = 0;
303 u32 hz = 0, prescale;
304
305 davinci_spi = spi_master_get_devdata(spi->master);
306 pdata = davinci_spi->pdata;
307
308 if (t) {
309 bits_per_word = t->bits_per_word;
310 hz = t->speed_hz;
311 }
312
313 /* if bits_per_word is not set then set it default */
314 if (!bits_per_word)
315 bits_per_word = spi->bits_per_word;
316
317 /*
318 * Assign function pointer to appropriate transfer method
319 * 8bit, 16bit or 32bit transfer
320 */
321 if (bits_per_word <= 8 && bits_per_word >= 2) {
322 davinci_spi->get_rx = davinci_spi_rx_buf_u8;
323 davinci_spi->get_tx = davinci_spi_tx_buf_u8;
324 davinci_spi->slave[spi->chip_select].bytes_per_word = 1;
325 } else if (bits_per_word <= 16 && bits_per_word >= 2) {
326 davinci_spi->get_rx = davinci_spi_rx_buf_u16;
327 davinci_spi->get_tx = davinci_spi_tx_buf_u16;
328 davinci_spi->slave[spi->chip_select].bytes_per_word = 2;
329 } else
330 return -EINVAL;
331
332 if (!hz)
333 hz = spi->max_speed_hz;
334
335 clear_fmt_bits(davinci_spi->base, SPIFMT_CHARLEN_MASK,
336 spi->chip_select);
337 set_fmt_bits(davinci_spi->base, bits_per_word & 0x1f,
338 spi->chip_select);
339
340 prescale = ((clk_get_rate(davinci_spi->clk) / hz) - 1) & 0xff;
341
342 clear_fmt_bits(davinci_spi->base, 0x0000ff00, spi->chip_select);
343 set_fmt_bits(davinci_spi->base, prescale << 8, spi->chip_select);
344
345 return 0;
346}
347
348static void davinci_spi_dma_rx_callback(unsigned lch, u16 ch_status, void *data)
349{
350 struct spi_device *spi = (struct spi_device *)data;
351 struct davinci_spi *davinci_spi;
352 struct davinci_spi_dma *davinci_spi_dma;
353 struct davinci_spi_platform_data *pdata;
354
355 davinci_spi = spi_master_get_devdata(spi->master);
356 davinci_spi_dma = &(davinci_spi->dma_channels[spi->chip_select]);
357 pdata = davinci_spi->pdata;
358
359 if (ch_status == DMA_COMPLETE)
360 edma_stop(davinci_spi_dma->dma_rx_channel);
361 else
362 edma_clean_channel(davinci_spi_dma->dma_rx_channel);
363
364 complete(&davinci_spi_dma->dma_rx_completion);
365 /* We must disable the DMA RX request */
366 davinci_spi_set_dma_req(spi, 0);
367}
368
369static void davinci_spi_dma_tx_callback(unsigned lch, u16 ch_status, void *data)
370{
371 struct spi_device *spi = (struct spi_device *)data;
372 struct davinci_spi *davinci_spi;
373 struct davinci_spi_dma *davinci_spi_dma;
374 struct davinci_spi_platform_data *pdata;
375
376 davinci_spi = spi_master_get_devdata(spi->master);
377 davinci_spi_dma = &(davinci_spi->dma_channels[spi->chip_select]);
378 pdata = davinci_spi->pdata;
379
380 if (ch_status == DMA_COMPLETE)
381 edma_stop(davinci_spi_dma->dma_tx_channel);
382 else
383 edma_clean_channel(davinci_spi_dma->dma_tx_channel);
384
385 complete(&davinci_spi_dma->dma_tx_completion);
386 /* We must disable the DMA TX request */
387 davinci_spi_set_dma_req(spi, 0);
388}
389
390static int davinci_spi_request_dma(struct spi_device *spi)
391{
392 struct davinci_spi *davinci_spi;
393 struct davinci_spi_dma *davinci_spi_dma;
394 struct davinci_spi_platform_data *pdata;
395 struct device *sdev;
396 int r;
397
398 davinci_spi = spi_master_get_devdata(spi->master);
399 davinci_spi_dma = &davinci_spi->dma_channels[spi->chip_select];
400 pdata = davinci_spi->pdata;
401 sdev = davinci_spi->bitbang.master->dev.parent;
402
403 r = edma_alloc_channel(davinci_spi_dma->dma_rx_sync_dev,
404 davinci_spi_dma_rx_callback, spi,
405 davinci_spi_dma->eventq);
406 if (r < 0) {
407 dev_dbg(sdev, "Unable to request DMA channel for SPI RX\n");
408 return -EAGAIN;
409 }
410 davinci_spi_dma->dma_rx_channel = r;
411 r = edma_alloc_channel(davinci_spi_dma->dma_tx_sync_dev,
412 davinci_spi_dma_tx_callback, spi,
413 davinci_spi_dma->eventq);
414 if (r < 0) {
415 edma_free_channel(davinci_spi_dma->dma_rx_channel);
416 davinci_spi_dma->dma_rx_channel = -1;
417 dev_dbg(sdev, "Unable to request DMA channel for SPI TX\n");
418 return -EAGAIN;
419 }
420 davinci_spi_dma->dma_tx_channel = r;
421
422 return 0;
423}
424
425/**
426 * davinci_spi_setup - This functions will set default transfer method
427 * @spi: spi device on which data transfer to be done
428 *
429 * This functions sets the default transfer method.
430 */
431
432static int davinci_spi_setup(struct spi_device *spi)
433{
434 int retval;
435 struct davinci_spi *davinci_spi;
436 struct davinci_spi_dma *davinci_spi_dma;
437 struct device *sdev;
438
439 davinci_spi = spi_master_get_devdata(spi->master);
440 sdev = davinci_spi->bitbang.master->dev.parent;
441
442 /* if bits per word length is zero then set it default 8 */
443 if (!spi->bits_per_word)
444 spi->bits_per_word = 8;
445
446 davinci_spi->slave[spi->chip_select].cmd_to_write = 0;
447
448 if (use_dma && davinci_spi->dma_channels) {
449 davinci_spi_dma = &davinci_spi->dma_channels[spi->chip_select];
450
451 if ((davinci_spi_dma->dma_rx_channel == -1)
452 || (davinci_spi_dma->dma_tx_channel == -1)) {
453 retval = davinci_spi_request_dma(spi);
454 if (retval < 0)
455 return retval;
456 }
457 }
458
459 /*
460 * SPI in DaVinci and DA8xx operate between
461 * 600 KHz and 50 MHz
462 */
463 if (spi->max_speed_hz < 600000 || spi->max_speed_hz > 50000000) {
464 dev_dbg(sdev, "Operating frequency is not in acceptable "
465 "range\n");
466 return -EINVAL;
467 }
468
469 /*
470 * Set up SPIFMTn register, unique to this chipselect.
471 *
472 * NOTE: we could do all of these with one write. Also, some
473 * of the "version 2" features are found in chips that don't
474 * support all of them...
475 */
476 if (spi->mode & SPI_LSB_FIRST)
477 set_fmt_bits(davinci_spi->base, SPIFMT_SHIFTDIR_MASK,
478 spi->chip_select);
479 else
480 clear_fmt_bits(davinci_spi->base, SPIFMT_SHIFTDIR_MASK,
481 spi->chip_select);
482
483 if (spi->mode & SPI_CPOL)
484 set_fmt_bits(davinci_spi->base, SPIFMT_POLARITY_MASK,
485 spi->chip_select);
486 else
487 clear_fmt_bits(davinci_spi->base, SPIFMT_POLARITY_MASK,
488 spi->chip_select);
489
490 if (!(spi->mode & SPI_CPHA))
491 set_fmt_bits(davinci_spi->base, SPIFMT_PHASE_MASK,
492 spi->chip_select);
493 else
494 clear_fmt_bits(davinci_spi->base, SPIFMT_PHASE_MASK,
495 spi->chip_select);
496
497 /*
498 * Version 1 hardware supports two basic SPI modes:
499 * - Standard SPI mode uses 4 pins, with chipselect
500 * - 3 pin SPI is a 4 pin variant without CS (SPI_NO_CS)
501 * (distinct from SPI_3WIRE, with just one data wire;
502 * or similar variants without MOSI or without MISO)
503 *
504 * Version 2 hardware supports an optional handshaking signal,
505 * so it can support two more modes:
506 * - 5 pin SPI variant is standard SPI plus SPI_READY
507 * - 4 pin with enable is (SPI_READY | SPI_NO_CS)
508 */
509
510 if (davinci_spi->version == SPI_VERSION_2) {
511 clear_fmt_bits(davinci_spi->base, SPIFMT_WDELAY_MASK,
512 spi->chip_select);
513 set_fmt_bits(davinci_spi->base,
514 (davinci_spi->pdata->wdelay
515 << SPIFMT_WDELAY_SHIFT)
516 & SPIFMT_WDELAY_MASK,
517 spi->chip_select);
518
519 if (davinci_spi->pdata->odd_parity)
520 set_fmt_bits(davinci_spi->base,
521 SPIFMT_ODD_PARITY_MASK,
522 spi->chip_select);
523 else
524 clear_fmt_bits(davinci_spi->base,
525 SPIFMT_ODD_PARITY_MASK,
526 spi->chip_select);
527
528 if (davinci_spi->pdata->parity_enable)
529 set_fmt_bits(davinci_spi->base,
530 SPIFMT_PARITYENA_MASK,
531 spi->chip_select);
532 else
533 clear_fmt_bits(davinci_spi->base,
534 SPIFMT_PARITYENA_MASK,
535 spi->chip_select);
536
537 if (davinci_spi->pdata->wait_enable)
538 set_fmt_bits(davinci_spi->base,
539 SPIFMT_WAITENA_MASK,
540 spi->chip_select);
541 else
542 clear_fmt_bits(davinci_spi->base,
543 SPIFMT_WAITENA_MASK,
544 spi->chip_select);
545
546 if (davinci_spi->pdata->timer_disable)
547 set_fmt_bits(davinci_spi->base,
548 SPIFMT_DISTIMER_MASK,
549 spi->chip_select);
550 else
551 clear_fmt_bits(davinci_spi->base,
552 SPIFMT_DISTIMER_MASK,
553 spi->chip_select);
554 }
555
556 retval = davinci_spi_setup_transfer(spi, NULL);
557
558 return retval;
559}
560
561static void davinci_spi_cleanup(struct spi_device *spi)
562{
563 struct davinci_spi *davinci_spi = spi_master_get_devdata(spi->master);
564 struct davinci_spi_dma *davinci_spi_dma;
565
566 davinci_spi_dma = &davinci_spi->dma_channels[spi->chip_select];
567
568 if (use_dma && davinci_spi->dma_channels) {
569 davinci_spi_dma = &davinci_spi->dma_channels[spi->chip_select];
570
571 if ((davinci_spi_dma->dma_rx_channel != -1)
572 && (davinci_spi_dma->dma_tx_channel != -1)) {
573 edma_free_channel(davinci_spi_dma->dma_tx_channel);
574 edma_free_channel(davinci_spi_dma->dma_rx_channel);
575 }
576 }
577}
578
579static int davinci_spi_bufs_prep(struct spi_device *spi,
580 struct davinci_spi *davinci_spi)
581{
582 int op_mode = 0;
583
584 /*
585 * REVISIT unless devices disagree about SPI_LOOP or
586 * SPI_READY (SPI_NO_CS only allows one device!), this
587 * should not need to be done before each message...
588 * optimize for both flags staying cleared.
589 */
590
591 op_mode = SPIPC0_DIFUN_MASK
592 | SPIPC0_DOFUN_MASK
593 | SPIPC0_CLKFUN_MASK;
594 if (!(spi->mode & SPI_NO_CS))
595 op_mode |= 1 << spi->chip_select;
596 if (spi->mode & SPI_READY)
597 op_mode |= SPIPC0_SPIENA_MASK;
598
599 iowrite32(op_mode, davinci_spi->base + SPIPC0);
600
601 if (spi->mode & SPI_LOOP)
602 set_io_bits(davinci_spi->base + SPIGCR1,
603 SPIGCR1_LOOPBACK_MASK);
604 else
605 clear_io_bits(davinci_spi->base + SPIGCR1,
606 SPIGCR1_LOOPBACK_MASK);
607
608 return 0;
609}
610
611static int davinci_spi_check_error(struct davinci_spi *davinci_spi,
612 int int_status)
613{
614 struct device *sdev = davinci_spi->bitbang.master->dev.parent;
615
616 if (int_status & SPIFLG_TIMEOUT_MASK) {
617 dev_dbg(sdev, "SPI Time-out Error\n");
618 return -ETIMEDOUT;
619 }
620 if (int_status & SPIFLG_DESYNC_MASK) {
621 dev_dbg(sdev, "SPI Desynchronization Error\n");
622 return -EIO;
623 }
624 if (int_status & SPIFLG_BITERR_MASK) {
625 dev_dbg(sdev, "SPI Bit error\n");
626 return -EIO;
627 }
628
629 if (davinci_spi->version == SPI_VERSION_2) {
630 if (int_status & SPIFLG_DLEN_ERR_MASK) {
631 dev_dbg(sdev, "SPI Data Length Error\n");
632 return -EIO;
633 }
634 if (int_status & SPIFLG_PARERR_MASK) {
635 dev_dbg(sdev, "SPI Parity Error\n");
636 return -EIO;
637 }
638 if (int_status & SPIFLG_OVRRUN_MASK) {
639 dev_dbg(sdev, "SPI Data Overrun error\n");
640 return -EIO;
641 }
642 if (int_status & SPIFLG_TX_INTR_MASK) {
643 dev_dbg(sdev, "SPI TX intr bit set\n");
644 return -EIO;
645 }
646 if (int_status & SPIFLG_BUF_INIT_ACTIVE_MASK) {
647 dev_dbg(sdev, "SPI Buffer Init Active\n");
648 return -EBUSY;
649 }
650 }
651
652 return 0;
653}
654
655/**
656 * davinci_spi_bufs - functions which will handle transfer data
657 * @spi: spi device on which data transfer to be done
658 * @t: spi transfer in which transfer info is filled
659 *
660 * This function will put data to be transferred into data register
661 * of SPI controller and then wait until the completion will be marked
662 * by the IRQ Handler.
663 */
664static int davinci_spi_bufs_pio(struct spi_device *spi, struct spi_transfer *t)
665{
666 struct davinci_spi *davinci_spi;
667 int int_status, count, ret;
668 u8 conv, tmp;
669 u32 tx_data, data1_reg_val;
670 u32 buf_val, flg_val;
671 struct davinci_spi_platform_data *pdata;
672
673 davinci_spi = spi_master_get_devdata(spi->master);
674 pdata = davinci_spi->pdata;
675
676 davinci_spi->tx = t->tx_buf;
677 davinci_spi->rx = t->rx_buf;
678
679 /* convert len to words based on bits_per_word */
680 conv = davinci_spi->slave[spi->chip_select].bytes_per_word;
681 davinci_spi->count = t->len / conv;
682
683 INIT_COMPLETION(davinci_spi->done);
684
685 ret = davinci_spi_bufs_prep(spi, davinci_spi);
686 if (ret)
687 return ret;
688
689 /* Enable SPI */
690 set_io_bits(davinci_spi->base + SPIGCR1, SPIGCR1_SPIENA_MASK);
691
692 iowrite32(0 | (pdata->c2tdelay << SPI_C2TDELAY_SHIFT) |
693 (pdata->t2cdelay << SPI_T2CDELAY_SHIFT),
694 davinci_spi->base + SPIDELAY);
695
696 count = davinci_spi->count;
697 data1_reg_val = pdata->cs_hold << SPIDAT1_CSHOLD_SHIFT;
698 tmp = ~(0x1 << spi->chip_select);
699
700 clear_io_bits(davinci_spi->base + SPIDEF, ~tmp);
701
702 data1_reg_val |= tmp << SPIDAT1_CSNR_SHIFT;
703
704 while ((ioread32(davinci_spi->base + SPIBUF)
705 & SPIBUF_RXEMPTY_MASK) == 0)
706 cpu_relax();
707
708 /* Determine the command to execute READ or WRITE */
709 if (t->tx_buf) {
710 clear_io_bits(davinci_spi->base + SPIINT, SPIINT_MASKALL);
711
712 while (1) {
713 tx_data = davinci_spi->get_tx(davinci_spi);
714
715 data1_reg_val &= ~(0xFFFF);
716 data1_reg_val |= (0xFFFF & tx_data);
717
718 buf_val = ioread32(davinci_spi->base + SPIBUF);
719 if ((buf_val & SPIBUF_TXFULL_MASK) == 0) {
720 iowrite32(data1_reg_val,
721 davinci_spi->base + SPIDAT1);
722
723 count--;
724 }
725 while (ioread32(davinci_spi->base + SPIBUF)
726 & SPIBUF_RXEMPTY_MASK)
727 cpu_relax();
728
729 /* getting the returned byte */
730 if (t->rx_buf) {
731 buf_val = ioread32(davinci_spi->base + SPIBUF);
732 davinci_spi->get_rx(buf_val, davinci_spi);
733 }
734 if (count <= 0)
735 break;
736 }
737 } else {
738 if (pdata->poll_mode) {
739 while (1) {
740 /* keeps the serial clock going */
741 if ((ioread32(davinci_spi->base + SPIBUF)
742 & SPIBUF_TXFULL_MASK) == 0)
743 iowrite32(data1_reg_val,
744 davinci_spi->base + SPIDAT1);
745
746 while (ioread32(davinci_spi->base + SPIBUF) &
747 SPIBUF_RXEMPTY_MASK)
748 cpu_relax();
749
750 flg_val = ioread32(davinci_spi->base + SPIFLG);
751 buf_val = ioread32(davinci_spi->base + SPIBUF);
752
753 davinci_spi->get_rx(buf_val, davinci_spi);
754
755 count--;
756 if (count <= 0)
757 break;
758 }
759 } else { /* Receive in Interrupt mode */
760 int i;
761
762 for (i = 0; i < davinci_spi->count; i++) {
763 set_io_bits(davinci_spi->base + SPIINT,
764 SPIINT_BITERR_INTR
765 | SPIINT_OVRRUN_INTR
766 | SPIINT_RX_INTR);
767
768 iowrite32(data1_reg_val,
769 davinci_spi->base + SPIDAT1);
770
771 while (ioread32(davinci_spi->base + SPIINT) &
772 SPIINT_RX_INTR)
773 cpu_relax();
774 }
775 iowrite32((data1_reg_val & 0x0ffcffff),
776 davinci_spi->base + SPIDAT1);
777 }
778 }
779
780 /*
781 * Check for bit error, desync error,parity error,timeout error and
782 * receive overflow errors
783 */
784 int_status = ioread32(davinci_spi->base + SPIFLG);
785
786 ret = davinci_spi_check_error(davinci_spi, int_status);
787 if (ret != 0)
788 return ret;
789
790 /* SPI Framework maintains the count only in bytes so convert back */
791 davinci_spi->count *= conv;
792
793 return t->len;
794}
795
796#define DAVINCI_DMA_DATA_TYPE_S8 0x01
797#define DAVINCI_DMA_DATA_TYPE_S16 0x02
798#define DAVINCI_DMA_DATA_TYPE_S32 0x04
799
800static int davinci_spi_bufs_dma(struct spi_device *spi, struct spi_transfer *t)
801{
802 struct davinci_spi *davinci_spi;
803 int int_status = 0;
804 int count, temp_count;
805 u8 conv = 1;
806 u8 tmp;
807 u32 data1_reg_val;
808 struct davinci_spi_dma *davinci_spi_dma;
809 int word_len, data_type, ret;
810 unsigned long tx_reg, rx_reg;
811 struct davinci_spi_platform_data *pdata;
812 struct device *sdev;
813
814 davinci_spi = spi_master_get_devdata(spi->master);
815 pdata = davinci_spi->pdata;
816 sdev = davinci_spi->bitbang.master->dev.parent;
817
818 davinci_spi_dma = &davinci_spi->dma_channels[spi->chip_select];
819
820 tx_reg = (unsigned long)davinci_spi->pbase + SPIDAT1;
821 rx_reg = (unsigned long)davinci_spi->pbase + SPIBUF;
822
823 davinci_spi->tx = t->tx_buf;
824 davinci_spi->rx = t->rx_buf;
825
826 /* convert len to words based on bits_per_word */
827 conv = davinci_spi->slave[spi->chip_select].bytes_per_word;
828 davinci_spi->count = t->len / conv;
829
830 INIT_COMPLETION(davinci_spi->done);
831
832 init_completion(&davinci_spi_dma->dma_rx_completion);
833 init_completion(&davinci_spi_dma->dma_tx_completion);
834
835 word_len = conv * 8;
836
837 if (word_len <= 8)
838 data_type = DAVINCI_DMA_DATA_TYPE_S8;
839 else if (word_len <= 16)
840 data_type = DAVINCI_DMA_DATA_TYPE_S16;
841 else if (word_len <= 32)
842 data_type = DAVINCI_DMA_DATA_TYPE_S32;
843 else
844 return -EINVAL;
845
846 ret = davinci_spi_bufs_prep(spi, davinci_spi);
847 if (ret)
848 return ret;
849
850 /* Put delay val if required */
851 iowrite32(0 | (pdata->c2tdelay << SPI_C2TDELAY_SHIFT) |
852 (pdata->t2cdelay << SPI_T2CDELAY_SHIFT),
853 davinci_spi->base + SPIDELAY);
854
855 count = davinci_spi->count; /* the number of elements */
856 data1_reg_val = pdata->cs_hold << SPIDAT1_CSHOLD_SHIFT;
857
858 /* CS default = 0xFF */
859 tmp = ~(0x1 << spi->chip_select);
860
861 clear_io_bits(davinci_spi->base + SPIDEF, ~tmp);
862
863 data1_reg_val |= tmp << SPIDAT1_CSNR_SHIFT;
864
865 /* disable all interrupts for dma transfers */
866 clear_io_bits(davinci_spi->base + SPIINT, SPIINT_MASKALL);
867 /* Disable SPI to write configuration bits in SPIDAT */
868 clear_io_bits(davinci_spi->base + SPIGCR1, SPIGCR1_SPIENA_MASK);
869 iowrite32(data1_reg_val, davinci_spi->base + SPIDAT1);
870 /* Enable SPI */
871 set_io_bits(davinci_spi->base + SPIGCR1, SPIGCR1_SPIENA_MASK);
872
873 while ((ioread32(davinci_spi->base + SPIBUF)
874 & SPIBUF_RXEMPTY_MASK) == 0)
875 cpu_relax();
876
877
878 if (t->tx_buf) {
879 t->tx_dma = dma_map_single(&spi->dev, (void *)t->tx_buf, count,
880 DMA_TO_DEVICE);
881 if (dma_mapping_error(&spi->dev, t->tx_dma)) {
882 dev_dbg(sdev, "Unable to DMA map a %d bytes"
883 " TX buffer\n", count);
884 return -ENOMEM;
885 }
886 temp_count = count;
887 } else {
888 /* We need TX clocking for RX transaction */
889 t->tx_dma = dma_map_single(&spi->dev,
890 (void *)davinci_spi->tmp_buf, count + 1,
891 DMA_TO_DEVICE);
892 if (dma_mapping_error(&spi->dev, t->tx_dma)) {
893 dev_dbg(sdev, "Unable to DMA map a %d bytes"
894 " TX tmp buffer\n", count);
895 return -ENOMEM;
896 }
897 temp_count = count + 1;
898 }
899
900 edma_set_transfer_params(davinci_spi_dma->dma_tx_channel,
901 data_type, temp_count, 1, 0, ASYNC);
902 edma_set_dest(davinci_spi_dma->dma_tx_channel, tx_reg, INCR, W8BIT);
903 edma_set_src(davinci_spi_dma->dma_tx_channel, t->tx_dma, INCR, W8BIT);
904 edma_set_src_index(davinci_spi_dma->dma_tx_channel, data_type, 0);
905 edma_set_dest_index(davinci_spi_dma->dma_tx_channel, 0, 0);
906
907 if (t->rx_buf) {
908 /* initiate transaction */
909 iowrite32(data1_reg_val, davinci_spi->base + SPIDAT1);
910
911 t->rx_dma = dma_map_single(&spi->dev, (void *)t->rx_buf, count,
912 DMA_FROM_DEVICE);
913 if (dma_mapping_error(&spi->dev, t->rx_dma)) {
914 dev_dbg(sdev, "Couldn't DMA map a %d bytes RX buffer\n",
915 count);
916 if (t->tx_buf != NULL)
917 dma_unmap_single(NULL, t->tx_dma,
918 count, DMA_TO_DEVICE);
919 return -ENOMEM;
920 }
921 edma_set_transfer_params(davinci_spi_dma->dma_rx_channel,
922 data_type, count, 1, 0, ASYNC);
923 edma_set_src(davinci_spi_dma->dma_rx_channel,
924 rx_reg, INCR, W8BIT);
925 edma_set_dest(davinci_spi_dma->dma_rx_channel,
926 t->rx_dma, INCR, W8BIT);
927 edma_set_src_index(davinci_spi_dma->dma_rx_channel, 0, 0);
928 edma_set_dest_index(davinci_spi_dma->dma_rx_channel,
929 data_type, 0);
930 }
931
932 if ((t->tx_buf) || (t->rx_buf))
933 edma_start(davinci_spi_dma->dma_tx_channel);
934
935 if (t->rx_buf)
936 edma_start(davinci_spi_dma->dma_rx_channel);
937
938 if ((t->rx_buf) || (t->tx_buf))
939 davinci_spi_set_dma_req(spi, 1);
940
941 if (t->tx_buf)
942 wait_for_completion_interruptible(
943 &davinci_spi_dma->dma_tx_completion);
944
945 if (t->rx_buf)
946 wait_for_completion_interruptible(
947 &davinci_spi_dma->dma_rx_completion);
948
949 dma_unmap_single(NULL, t->tx_dma, temp_count, DMA_TO_DEVICE);
950
951 if (t->rx_buf)
952 dma_unmap_single(NULL, t->rx_dma, count, DMA_FROM_DEVICE);
953
954 /*
955 * Check for bit error, desync error,parity error,timeout error and
956 * receive overflow errors
957 */
958 int_status = ioread32(davinci_spi->base + SPIFLG);
959
960 ret = davinci_spi_check_error(davinci_spi, int_status);
961 if (ret != 0)
962 return ret;
963
964 /* SPI Framework maintains the count only in bytes so convert back */
965 davinci_spi->count *= conv;
966
967 return t->len;
968}
969
970/**
971 * davinci_spi_irq - IRQ handler for DaVinci SPI
972 * @irq: IRQ number for this SPI Master
973 * @context_data: structure for SPI Master controller davinci_spi
974 */
975static irqreturn_t davinci_spi_irq(s32 irq, void *context_data)
976{
977 struct davinci_spi *davinci_spi = context_data;
978 u32 int_status, rx_data = 0;
979 irqreturn_t ret = IRQ_NONE;
980
981 int_status = ioread32(davinci_spi->base + SPIFLG);
982
983 while ((int_status & SPIFLG_RX_INTR_MASK)) {
984 if (likely(int_status & SPIFLG_RX_INTR_MASK)) {
985 ret = IRQ_HANDLED;
986
987 rx_data = ioread32(davinci_spi->base + SPIBUF);
988 davinci_spi->get_rx(rx_data, davinci_spi);
989
990 /* Disable Receive Interrupt */
991 iowrite32(~(SPIINT_RX_INTR | SPIINT_TX_INTR),
992 davinci_spi->base + SPIINT);
993 } else
994 (void)davinci_spi_check_error(davinci_spi, int_status);
995
996 int_status = ioread32(davinci_spi->base + SPIFLG);
997 }
998
999 return ret;
1000}
1001
1002/**
1003 * davinci_spi_probe - probe function for SPI Master Controller
1004 * @pdev: platform_device structure which contains plateform specific data
1005 */
1006static int davinci_spi_probe(struct platform_device *pdev)
1007{
1008 struct spi_master *master;
1009 struct davinci_spi *davinci_spi;
1010 struct davinci_spi_platform_data *pdata;
1011 struct resource *r, *mem;
1012 resource_size_t dma_rx_chan = SPI_NO_RESOURCE;
1013 resource_size_t dma_tx_chan = SPI_NO_RESOURCE;
1014 resource_size_t dma_eventq = SPI_NO_RESOURCE;
1015 int i = 0, ret = 0;
1016
1017 pdata = pdev->dev.platform_data;
1018 if (pdata == NULL) {
1019 ret = -ENODEV;
1020 goto err;
1021 }
1022
1023 master = spi_alloc_master(&pdev->dev, sizeof(struct davinci_spi));
1024 if (master == NULL) {
1025 ret = -ENOMEM;
1026 goto err;
1027 }
1028
1029 dev_set_drvdata(&pdev->dev, master);
1030
1031 davinci_spi = spi_master_get_devdata(master);
1032 if (davinci_spi == NULL) {
1033 ret = -ENOENT;
1034 goto free_master;
1035 }
1036
1037 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1038 if (r == NULL) {
1039 ret = -ENOENT;
1040 goto free_master;
1041 }
1042
1043 davinci_spi->pbase = r->start;
1044 davinci_spi->region_size = resource_size(r);
1045 davinci_spi->pdata = pdata;
1046
1047 mem = request_mem_region(r->start, davinci_spi->region_size,
1048 pdev->name);
1049 if (mem == NULL) {
1050 ret = -EBUSY;
1051 goto free_master;
1052 }
1053
1054 davinci_spi->base = (struct davinci_spi_reg __iomem *)
1055 ioremap(r->start, davinci_spi->region_size);
1056 if (davinci_spi->base == NULL) {
1057 ret = -ENOMEM;
1058 goto release_region;
1059 }
1060
1061 davinci_spi->irq = platform_get_irq(pdev, 0);
1062 if (davinci_spi->irq <= 0) {
1063 ret = -EINVAL;
1064 goto unmap_io;
1065 }
1066
1067 ret = request_irq(davinci_spi->irq, davinci_spi_irq, IRQF_DISABLED,
1068 dev_name(&pdev->dev), davinci_spi);
1069 if (ret)
1070 goto unmap_io;
1071
1072 /* Allocate tmp_buf for tx_buf */
1073 davinci_spi->tmp_buf = kzalloc(SPI_BUFSIZ, GFP_KERNEL);
1074 if (davinci_spi->tmp_buf == NULL) {
1075 ret = -ENOMEM;
1076 goto irq_free;
1077 }
1078
1079 davinci_spi->bitbang.master = spi_master_get(master);
1080 if (davinci_spi->bitbang.master == NULL) {
1081 ret = -ENODEV;
1082 goto free_tmp_buf;
1083 }
1084
1085 davinci_spi->clk = clk_get(&pdev->dev, NULL);
1086 if (IS_ERR(davinci_spi->clk)) {
1087 ret = -ENODEV;
1088 goto put_master;
1089 }
1090 clk_enable(davinci_spi->clk);
1091
1092
1093 master->bus_num = pdev->id;
1094 master->num_chipselect = pdata->num_chipselect;
1095 master->setup = davinci_spi_setup;
1096 master->cleanup = davinci_spi_cleanup;
1097
1098 davinci_spi->bitbang.chipselect = davinci_spi_chipselect;
1099 davinci_spi->bitbang.setup_transfer = davinci_spi_setup_transfer;
1100
1101 davinci_spi->version = pdata->version;
1102 use_dma = pdata->use_dma;
1103
1104 davinci_spi->bitbang.flags = SPI_NO_CS | SPI_LSB_FIRST | SPI_LOOP;
1105 if (davinci_spi->version == SPI_VERSION_2)
1106 davinci_spi->bitbang.flags |= SPI_READY;
1107
1108 if (use_dma) {
1109 r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
1110 if (r)
1111 dma_rx_chan = r->start;
1112 r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
1113 if (r)
1114 dma_tx_chan = r->start;
1115 r = platform_get_resource(pdev, IORESOURCE_DMA, 2);
1116 if (r)
1117 dma_eventq = r->start;
1118 }
1119
1120 if (!use_dma ||
1121 dma_rx_chan == SPI_NO_RESOURCE ||
1122 dma_tx_chan == SPI_NO_RESOURCE ||
1123 dma_eventq == SPI_NO_RESOURCE) {
1124 davinci_spi->bitbang.txrx_bufs = davinci_spi_bufs_pio;
1125 use_dma = 0;
1126 } else {
1127 davinci_spi->bitbang.txrx_bufs = davinci_spi_bufs_dma;
1128 davinci_spi->dma_channels = kzalloc(master->num_chipselect
1129 * sizeof(struct davinci_spi_dma), GFP_KERNEL);
1130 if (davinci_spi->dma_channels == NULL) {
1131 ret = -ENOMEM;
1132 goto free_clk;
1133 }
1134
1135 for (i = 0; i < master->num_chipselect; i++) {
1136 davinci_spi->dma_channels[i].dma_rx_channel = -1;
1137 davinci_spi->dma_channels[i].dma_rx_sync_dev =
1138 dma_rx_chan;
1139 davinci_spi->dma_channels[i].dma_tx_channel = -1;
1140 davinci_spi->dma_channels[i].dma_tx_sync_dev =
1141 dma_tx_chan;
1142 davinci_spi->dma_channels[i].eventq = dma_eventq;
1143 }
1144 dev_info(&pdev->dev, "DaVinci SPI driver in EDMA mode\n"
1145 "Using RX channel = %d , TX channel = %d and "
1146 "event queue = %d", dma_rx_chan, dma_tx_chan,
1147 dma_eventq);
1148 }
1149
1150 davinci_spi->get_rx = davinci_spi_rx_buf_u8;
1151 davinci_spi->get_tx = davinci_spi_tx_buf_u8;
1152
1153 init_completion(&davinci_spi->done);
1154
1155 /* Reset In/OUT SPI module */
1156 iowrite32(0, davinci_spi->base + SPIGCR0);
1157 udelay(100);
1158 iowrite32(1, davinci_spi->base + SPIGCR0);
1159
1160 /* Clock internal */
1161 if (davinci_spi->pdata->clk_internal)
1162 set_io_bits(davinci_spi->base + SPIGCR1,
1163 SPIGCR1_CLKMOD_MASK);
1164 else
1165 clear_io_bits(davinci_spi->base + SPIGCR1,
1166 SPIGCR1_CLKMOD_MASK);
1167
1168 /* master mode default */
1169 set_io_bits(davinci_spi->base + SPIGCR1, SPIGCR1_MASTER_MASK);
1170
1171 if (davinci_spi->pdata->intr_level)
1172 iowrite32(SPI_INTLVL_1, davinci_spi->base + SPILVL);
1173 else
1174 iowrite32(SPI_INTLVL_0, davinci_spi->base + SPILVL);
1175
1176 ret = spi_bitbang_start(&davinci_spi->bitbang);
1177 if (ret)
1178 goto free_clk;
1179
1180 dev_info(&pdev->dev, "Controller at 0x%p \n", davinci_spi->base);
1181
1182 if (!pdata->poll_mode)
1183 dev_info(&pdev->dev, "Operating in interrupt mode"
1184 " using IRQ %d\n", davinci_spi->irq);
1185
1186 return ret;
1187
1188free_clk:
1189 clk_disable(davinci_spi->clk);
1190 clk_put(davinci_spi->clk);
1191put_master:
1192 spi_master_put(master);
1193free_tmp_buf:
1194 kfree(davinci_spi->tmp_buf);
1195irq_free:
1196 free_irq(davinci_spi->irq, davinci_spi);
1197unmap_io:
1198 iounmap(davinci_spi->base);
1199release_region:
1200 release_mem_region(davinci_spi->pbase, davinci_spi->region_size);
1201free_master:
1202 kfree(master);
1203err:
1204 return ret;
1205}
1206
1207/**
1208 * davinci_spi_remove - remove function for SPI Master Controller
1209 * @pdev: platform_device structure which contains plateform specific data
1210 *
1211 * This function will do the reverse action of davinci_spi_probe function
1212 * It will free the IRQ and SPI controller's memory region.
1213 * It will also call spi_bitbang_stop to destroy the work queue which was
1214 * created by spi_bitbang_start.
1215 */
1216static int __exit davinci_spi_remove(struct platform_device *pdev)
1217{
1218 struct davinci_spi *davinci_spi;
1219 struct spi_master *master;
1220
1221 master = dev_get_drvdata(&pdev->dev);
1222 davinci_spi = spi_master_get_devdata(master);
1223
1224 spi_bitbang_stop(&davinci_spi->bitbang);
1225
1226 clk_disable(davinci_spi->clk);
1227 clk_put(davinci_spi->clk);
1228 spi_master_put(master);
1229 kfree(davinci_spi->tmp_buf);
1230 free_irq(davinci_spi->irq, davinci_spi);
1231 iounmap(davinci_spi->base);
1232 release_mem_region(davinci_spi->pbase, davinci_spi->region_size);
1233
1234 return 0;
1235}
1236
1237static struct platform_driver davinci_spi_driver = {
1238 .driver.name = "spi_davinci",
1239 .remove = __exit_p(davinci_spi_remove),
1240};
1241
1242static int __init davinci_spi_init(void)
1243{
1244 return platform_driver_probe(&davinci_spi_driver, davinci_spi_probe);
1245}
1246module_init(davinci_spi_init);
1247
1248static void __exit davinci_spi_exit(void)
1249{
1250 platform_driver_unregister(&davinci_spi_driver);
1251}
1252module_exit(davinci_spi_exit);
1253
1254MODULE_DESCRIPTION("TI DaVinci SPI Master Controller Driver");
1255MODULE_LICENSE("GPL");
diff --git a/drivers/spi/dw_spi.c b/drivers/spi/dw_spi.c
index 31620fae77be..8ed38f1d6c18 100644
--- a/drivers/spi/dw_spi.c
+++ b/drivers/spi/dw_spi.c
@@ -152,6 +152,7 @@ static void mrst_spi_debugfs_remove(struct dw_spi *dws)
152#else 152#else
153static inline int mrst_spi_debugfs_init(struct dw_spi *dws) 153static inline int mrst_spi_debugfs_init(struct dw_spi *dws)
154{ 154{
155 return 0;
155} 156}
156 157
157static inline void mrst_spi_debugfs_remove(struct dw_spi *dws) 158static inline void mrst_spi_debugfs_remove(struct dw_spi *dws)
@@ -161,14 +162,14 @@ static inline void mrst_spi_debugfs_remove(struct dw_spi *dws)
161 162
162static void wait_till_not_busy(struct dw_spi *dws) 163static void wait_till_not_busy(struct dw_spi *dws)
163{ 164{
164 unsigned long end = jiffies + usecs_to_jiffies(1000); 165 unsigned long end = jiffies + 1 + usecs_to_jiffies(1000);
165 166
166 while (time_before(jiffies, end)) { 167 while (time_before(jiffies, end)) {
167 if (!(dw_readw(dws, sr) & SR_BUSY)) 168 if (!(dw_readw(dws, sr) & SR_BUSY))
168 return; 169 return;
169 } 170 }
170 dev_err(&dws->master->dev, 171 dev_err(&dws->master->dev,
171 "DW SPI: Stutus keeps busy for 1000us after a read/write!\n"); 172 "DW SPI: Status keeps busy for 1000us after a read/write!\n");
172} 173}
173 174
174static void flush(struct dw_spi *dws) 175static void flush(struct dw_spi *dws)
@@ -358,6 +359,8 @@ static void transfer_complete(struct dw_spi *dws)
358static irqreturn_t interrupt_transfer(struct dw_spi *dws) 359static irqreturn_t interrupt_transfer(struct dw_spi *dws)
359{ 360{
360 u16 irq_status, irq_mask = 0x3f; 361 u16 irq_status, irq_mask = 0x3f;
362 u32 int_level = dws->fifo_len / 2;
363 u32 left;
361 364
362 irq_status = dw_readw(dws, isr) & irq_mask; 365 irq_status = dw_readw(dws, isr) & irq_mask;
363 /* Error handling */ 366 /* Error handling */
@@ -369,22 +372,23 @@ static irqreturn_t interrupt_transfer(struct dw_spi *dws)
369 return IRQ_HANDLED; 372 return IRQ_HANDLED;
370 } 373 }
371 374
372 /* INT comes from tx */ 375 if (irq_status & SPI_INT_TXEI) {
373 if (dws->tx && (irq_status & SPI_INT_TXEI)) { 376 spi_mask_intr(dws, SPI_INT_TXEI);
374 while (dws->tx < dws->tx_end) 377
378 left = (dws->tx_end - dws->tx) / dws->n_bytes;
379 left = (left > int_level) ? int_level : left;
380
381 while (left--)
375 dws->write(dws); 382 dws->write(dws);
383 dws->read(dws);
376 384
377 if (dws->tx == dws->tx_end) { 385 /* Re-enable the IRQ if there is still data left to tx */
378 spi_mask_intr(dws, SPI_INT_TXEI); 386 if (dws->tx_end > dws->tx)
387 spi_umask_intr(dws, SPI_INT_TXEI);
388 else
379 transfer_complete(dws); 389 transfer_complete(dws);
380 }
381 } 390 }
382 391
383 /* INT comes from rx */
384 if (dws->rx && (irq_status & SPI_INT_RXFI)) {
385 if (dws->read(dws))
386 transfer_complete(dws);
387 }
388 return IRQ_HANDLED; 392 return IRQ_HANDLED;
389} 393}
390 394
@@ -404,12 +408,9 @@ static irqreturn_t dw_spi_irq(int irq, void *dev_id)
404/* Must be called inside pump_transfers() */ 408/* Must be called inside pump_transfers() */
405static void poll_transfer(struct dw_spi *dws) 409static void poll_transfer(struct dw_spi *dws)
406{ 410{
407 if (dws->tx) { 411 while (dws->write(dws))
408 while (dws->write(dws)) 412 dws->read(dws);
409 dws->read(dws);
410 }
411 413
412 dws->read(dws);
413 transfer_complete(dws); 414 transfer_complete(dws);
414} 415}
415 416
@@ -428,6 +429,7 @@ static void pump_transfers(unsigned long data)
428 u8 bits = 0; 429 u8 bits = 0;
429 u8 imask = 0; 430 u8 imask = 0;
430 u8 cs_change = 0; 431 u8 cs_change = 0;
432 u16 txint_level = 0;
431 u16 clk_div = 0; 433 u16 clk_div = 0;
432 u32 speed = 0; 434 u32 speed = 0;
433 u32 cr0 = 0; 435 u32 cr0 = 0;
@@ -438,6 +440,9 @@ static void pump_transfers(unsigned long data)
438 chip = dws->cur_chip; 440 chip = dws->cur_chip;
439 spi = message->spi; 441 spi = message->spi;
440 442
443 if (unlikely(!chip->clk_div))
444 chip->clk_div = dws->max_freq / chip->speed_hz;
445
441 if (message->state == ERROR_STATE) { 446 if (message->state == ERROR_STATE) {
442 message->status = -EIO; 447 message->status = -EIO;
443 goto early_exit; 448 goto early_exit;
@@ -492,7 +497,7 @@ static void pump_transfers(unsigned long data)
492 497
493 /* clk_div doesn't support odd number */ 498 /* clk_div doesn't support odd number */
494 clk_div = dws->max_freq / speed; 499 clk_div = dws->max_freq / speed;
495 clk_div = (clk_div >> 1) << 1; 500 clk_div = (clk_div + 1) & 0xfffe;
496 501
497 chip->speed_hz = speed; 502 chip->speed_hz = speed;
498 chip->clk_div = clk_div; 503 chip->clk_div = clk_div;
@@ -532,14 +537,35 @@ static void pump_transfers(unsigned long data)
532 } 537 }
533 message->state = RUNNING_STATE; 538 message->state = RUNNING_STATE;
534 539
540 /*
541 * Adjust transfer mode if necessary. Requires platform dependent
542 * chipselect mechanism.
543 */
544 if (dws->cs_control) {
545 if (dws->rx && dws->tx)
546 chip->tmode = 0x00;
547 else if (dws->rx)
548 chip->tmode = 0x02;
549 else
550 chip->tmode = 0x01;
551
552 cr0 &= ~(0x3 << SPI_MODE_OFFSET);
553 cr0 |= (chip->tmode << SPI_TMOD_OFFSET);
554 }
555
535 /* Check if current transfer is a DMA transaction */ 556 /* Check if current transfer is a DMA transaction */
536 dws->dma_mapped = map_dma_buffers(dws); 557 dws->dma_mapped = map_dma_buffers(dws);
537 558
559 /*
560 * Interrupt mode
561 * we only need set the TXEI IRQ, as TX/RX always happen syncronizely
562 */
538 if (!dws->dma_mapped && !chip->poll_mode) { 563 if (!dws->dma_mapped && !chip->poll_mode) {
539 if (dws->rx) 564 int templen = dws->len / dws->n_bytes;
540 imask |= SPI_INT_RXFI; 565 txint_level = dws->fifo_len / 2;
541 if (dws->tx) 566 txint_level = (templen > txint_level) ? txint_level : templen;
542 imask |= SPI_INT_TXEI; 567
568 imask |= SPI_INT_TXEI;
543 dws->transfer_handler = interrupt_transfer; 569 dws->transfer_handler = interrupt_transfer;
544 } 570 }
545 571
@@ -549,21 +575,23 @@ static void pump_transfers(unsigned long data)
549 * 2. clk_div is changed 575 * 2. clk_div is changed
550 * 3. control value changes 576 * 3. control value changes
551 */ 577 */
552 if (dw_readw(dws, ctrl0) != cr0 || cs_change || clk_div) { 578 if (dw_readw(dws, ctrl0) != cr0 || cs_change || clk_div || imask) {
553 spi_enable_chip(dws, 0); 579 spi_enable_chip(dws, 0);
554 580
555 if (dw_readw(dws, ctrl0) != cr0) 581 if (dw_readw(dws, ctrl0) != cr0)
556 dw_writew(dws, ctrl0, cr0); 582 dw_writew(dws, ctrl0, cr0);
557 583
584 spi_set_clk(dws, clk_div ? clk_div : chip->clk_div);
585 spi_chip_sel(dws, spi->chip_select);
586
558 /* Set the interrupt mask, for poll mode just diable all int */ 587 /* Set the interrupt mask, for poll mode just diable all int */
559 spi_mask_intr(dws, 0xff); 588 spi_mask_intr(dws, 0xff);
560 if (!chip->poll_mode) 589 if (imask)
561 spi_umask_intr(dws, imask); 590 spi_umask_intr(dws, imask);
591 if (txint_level)
592 dw_writew(dws, txfltr, txint_level);
562 593
563 spi_set_clk(dws, clk_div ? clk_div : chip->clk_div);
564 spi_chip_sel(dws, spi->chip_select);
565 spi_enable_chip(dws, 1); 594 spi_enable_chip(dws, 1);
566
567 if (cs_change) 595 if (cs_change)
568 dws->prev_chip = chip; 596 dws->prev_chip = chip;
569 } 597 }
@@ -712,11 +740,11 @@ static int dw_spi_setup(struct spi_device *spi)
712 } 740 }
713 chip->bits_per_word = spi->bits_per_word; 741 chip->bits_per_word = spi->bits_per_word;
714 742
743 if (!spi->max_speed_hz) {
744 dev_err(&spi->dev, "No max speed HZ parameter\n");
745 return -EINVAL;
746 }
715 chip->speed_hz = spi->max_speed_hz; 747 chip->speed_hz = spi->max_speed_hz;
716 if (chip->speed_hz)
717 chip->clk_div = 25000000 / chip->speed_hz;
718 else
719 chip->clk_div = 8; /* default value */
720 748
721 chip->tmode = 0; /* Tx & Rx */ 749 chip->tmode = 0; /* Tx & Rx */
722 /* Default SPI mode is SCPOL = 0, SCPH = 0 */ 750 /* Default SPI mode is SCPOL = 0, SCPH = 0 */
@@ -735,7 +763,7 @@ static void dw_spi_cleanup(struct spi_device *spi)
735 kfree(chip); 763 kfree(chip);
736} 764}
737 765
738static int __init init_queue(struct dw_spi *dws) 766static int __devinit init_queue(struct dw_spi *dws)
739{ 767{
740 INIT_LIST_HEAD(&dws->queue); 768 INIT_LIST_HEAD(&dws->queue);
741 spin_lock_init(&dws->lock); 769 spin_lock_init(&dws->lock);
@@ -817,6 +845,22 @@ static void spi_hw_init(struct dw_spi *dws)
817 spi_mask_intr(dws, 0xff); 845 spi_mask_intr(dws, 0xff);
818 spi_enable_chip(dws, 1); 846 spi_enable_chip(dws, 1);
819 flush(dws); 847 flush(dws);
848
849 /*
850 * Try to detect the FIFO depth if not set by interface driver,
851 * the depth could be from 2 to 256 from HW spec
852 */
853 if (!dws->fifo_len) {
854 u32 fifo;
855 for (fifo = 2; fifo <= 257; fifo++) {
856 dw_writew(dws, txfltr, fifo);
857 if (fifo != dw_readw(dws, txfltr))
858 break;
859 }
860
861 dws->fifo_len = (fifo == 257) ? 0 : fifo;
862 dw_writew(dws, txfltr, 0);
863 }
820} 864}
821 865
822int __devinit dw_spi_add_host(struct dw_spi *dws) 866int __devinit dw_spi_add_host(struct dw_spi *dws)
@@ -913,6 +957,7 @@ void __devexit dw_spi_remove_host(struct dw_spi *dws)
913 /* Disconnect from the SPI framework */ 957 /* Disconnect from the SPI framework */
914 spi_unregister_master(dws->master); 958 spi_unregister_master(dws->master);
915} 959}
960EXPORT_SYMBOL(dw_spi_remove_host);
916 961
917int dw_spi_suspend_host(struct dw_spi *dws) 962int dw_spi_suspend_host(struct dw_spi *dws)
918{ 963{
diff --git a/drivers/spi/dw_spi_mmio.c b/drivers/spi/dw_spi_mmio.c
new file mode 100644
index 000000000000..e35b45ac5174
--- /dev/null
+++ b/drivers/spi/dw_spi_mmio.c
@@ -0,0 +1,147 @@
1/*
2 * dw_spi_mmio.c - Memory-mapped interface driver for DW SPI Core
3 *
4 * Copyright (c) 2010, Octasic semiconductor.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 */
10
11#include <linux/clk.h>
12#include <linux/interrupt.h>
13#include <linux/platform_device.h>
14#include <linux/spi/dw_spi.h>
15#include <linux/spi/spi.h>
16
17#define DRIVER_NAME "dw_spi_mmio"
18
19struct dw_spi_mmio {
20 struct dw_spi dws;
21 struct clk *clk;
22};
23
24static int __devinit dw_spi_mmio_probe(struct platform_device *pdev)
25{
26 struct dw_spi_mmio *dwsmmio;
27 struct dw_spi *dws;
28 struct resource *mem, *ioarea;
29 int ret;
30
31 dwsmmio = kzalloc(sizeof(struct dw_spi_mmio), GFP_KERNEL);
32 if (!dwsmmio) {
33 ret = -ENOMEM;
34 goto err_end;
35 }
36
37 dws = &dwsmmio->dws;
38
39 /* Get basic io resource and map it */
40 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
41 if (!mem) {
42 dev_err(&pdev->dev, "no mem resource?\n");
43 ret = -EINVAL;
44 goto err_kfree;
45 }
46
47 ioarea = request_mem_region(mem->start, resource_size(mem),
48 pdev->name);
49 if (!ioarea) {
50 dev_err(&pdev->dev, "SPI region already claimed\n");
51 ret = -EBUSY;
52 goto err_kfree;
53 }
54
55 dws->regs = ioremap_nocache(mem->start, resource_size(mem));
56 if (!dws->regs) {
57 dev_err(&pdev->dev, "SPI region already mapped\n");
58 ret = -ENOMEM;
59 goto err_release_reg;
60 }
61
62 dws->irq = platform_get_irq(pdev, 0);
63 if (dws->irq < 0) {
64 dev_err(&pdev->dev, "no irq resource?\n");
65 ret = dws->irq; /* -ENXIO */
66 goto err_unmap;
67 }
68
69 dwsmmio->clk = clk_get(&pdev->dev, NULL);
70 if (!dwsmmio->clk) {
71 ret = -ENODEV;
72 goto err_irq;
73 }
74 clk_enable(dwsmmio->clk);
75
76 dws->parent_dev = &pdev->dev;
77 dws->bus_num = 0;
78 dws->num_cs = 4;
79 dws->max_freq = clk_get_rate(dwsmmio->clk);
80
81 ret = dw_spi_add_host(dws);
82 if (ret)
83 goto err_clk;
84
85 platform_set_drvdata(pdev, dwsmmio);
86 return 0;
87
88err_clk:
89 clk_disable(dwsmmio->clk);
90 clk_put(dwsmmio->clk);
91 dwsmmio->clk = NULL;
92err_irq:
93 free_irq(dws->irq, dws);
94err_unmap:
95 iounmap(dws->regs);
96err_release_reg:
97 release_mem_region(mem->start, resource_size(mem));
98err_kfree:
99 kfree(dwsmmio);
100err_end:
101 return ret;
102}
103
104static int __devexit dw_spi_mmio_remove(struct platform_device *pdev)
105{
106 struct dw_spi_mmio *dwsmmio = platform_get_drvdata(pdev);
107 struct resource *mem;
108
109 platform_set_drvdata(pdev, NULL);
110
111 clk_disable(dwsmmio->clk);
112 clk_put(dwsmmio->clk);
113 dwsmmio->clk = NULL;
114
115 free_irq(dwsmmio->dws.irq, &dwsmmio->dws);
116 dw_spi_remove_host(&dwsmmio->dws);
117 iounmap(dwsmmio->dws.regs);
118 kfree(dwsmmio);
119
120 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
121 release_mem_region(mem->start, resource_size(mem));
122 return 0;
123}
124
125static struct platform_driver dw_spi_mmio_driver = {
126 .remove = __devexit_p(dw_spi_mmio_remove),
127 .driver = {
128 .name = DRIVER_NAME,
129 .owner = THIS_MODULE,
130 },
131};
132
133static int __init dw_spi_mmio_init(void)
134{
135 return platform_driver_probe(&dw_spi_mmio_driver, dw_spi_mmio_probe);
136}
137module_init(dw_spi_mmio_init);
138
139static void __exit dw_spi_mmio_exit(void)
140{
141 platform_driver_unregister(&dw_spi_mmio_driver);
142}
143module_exit(dw_spi_mmio_exit);
144
145MODULE_AUTHOR("Jean-Hugues Deschenes <jean-hugues.deschenes@octasic.com>");
146MODULE_DESCRIPTION("Memory-mapped I/O interface driver for DW SPI Core");
147MODULE_LICENSE("GPL v2");
diff --git a/drivers/spi/dw_spi_pci.c b/drivers/spi/dw_spi_pci.c
index 34ba69161734..1f0735f9cc76 100644
--- a/drivers/spi/dw_spi_pci.c
+++ b/drivers/spi/dw_spi_pci.c
@@ -73,6 +73,7 @@ static int __devinit spi_pci_probe(struct pci_dev *pdev,
73 dws->num_cs = 4; 73 dws->num_cs = 4;
74 dws->max_freq = 25000000; /* for Moorestwon */ 74 dws->max_freq = 25000000; /* for Moorestwon */
75 dws->irq = pdev->irq; 75 dws->irq = pdev->irq;
76 dws->fifo_len = 40; /* FIFO has 40 words buffer */
76 77
77 ret = dw_spi_add_host(dws); 78 ret = dw_spi_add_host(dws);
78 if (ret) 79 if (ret)
@@ -98,6 +99,7 @@ static void __devexit spi_pci_remove(struct pci_dev *pdev)
98 struct dw_spi_pci *dwpci = pci_get_drvdata(pdev); 99 struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
99 100
100 pci_set_drvdata(pdev, NULL); 101 pci_set_drvdata(pdev, NULL);
102 dw_spi_remove_host(&dwpci->dws);
101 iounmap(dwpci->dws.regs); 103 iounmap(dwpci->dws.regs);
102 pci_release_region(pdev, 0); 104 pci_release_region(pdev, 0);
103 kfree(dwpci); 105 kfree(dwpci);
diff --git a/drivers/spi/mpc52xx_psc_spi.c b/drivers/spi/mpc52xx_psc_spi.c
index f50c81df336a..04747868d6c4 100644
--- a/drivers/spi/mpc52xx_psc_spi.c
+++ b/drivers/spi/mpc52xx_psc_spi.c
@@ -503,7 +503,7 @@ static int __exit mpc52xx_psc_spi_of_remove(struct of_device *op)
503 return mpc52xx_psc_spi_do_remove(&op->dev); 503 return mpc52xx_psc_spi_do_remove(&op->dev);
504} 504}
505 505
506static struct of_device_id mpc52xx_psc_spi_of_match[] = { 506static const struct of_device_id mpc52xx_psc_spi_of_match[] = {
507 { .compatible = "fsl,mpc5200-psc-spi", }, 507 { .compatible = "fsl,mpc5200-psc-spi", },
508 { .compatible = "mpc5200-psc-spi", }, /* old */ 508 { .compatible = "mpc5200-psc-spi", }, /* old */
509 {} 509 {}
diff --git a/drivers/spi/mpc52xx_spi.c b/drivers/spi/mpc52xx_spi.c
index 45bfe6458173..6eab46537a0a 100644
--- a/drivers/spi/mpc52xx_spi.c
+++ b/drivers/spi/mpc52xx_spi.c
@@ -550,7 +550,7 @@ static int __devexit mpc52xx_spi_remove(struct of_device *op)
550 return 0; 550 return 0;
551} 551}
552 552
553static struct of_device_id mpc52xx_spi_match[] __devinitdata = { 553static const struct of_device_id mpc52xx_spi_match[] __devinitconst = {
554 { .compatible = "fsl,mpc5200-spi", }, 554 { .compatible = "fsl,mpc5200-spi", },
555 {} 555 {}
556}; 556};
diff --git a/drivers/spi/spi_imx.c b/drivers/spi/spi_imx.c
index 1893f1e96dc4..0ddbbe45e834 100644
--- a/drivers/spi/spi_imx.c
+++ b/drivers/spi/spi_imx.c
@@ -469,7 +469,7 @@ static int spi_imx_setup(struct spi_device *spi)
469 struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master); 469 struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master);
470 int gpio = spi_imx->chipselect[spi->chip_select]; 470 int gpio = spi_imx->chipselect[spi->chip_select];
471 471
472 pr_debug("%s: mode %d, %u bpw, %d hz\n", __func__, 472 dev_dbg(&spi->dev, "%s: mode %d, %u bpw, %d hz\n", __func__,
473 spi->mode, spi->bits_per_word, spi->max_speed_hz); 473 spi->mode, spi->bits_per_word, spi->max_speed_hz);
474 474
475 if (gpio >= 0) 475 if (gpio >= 0)
diff --git a/drivers/spi/spi_mpc8xxx.c b/drivers/spi/spi_mpc8xxx.c
index 1fb2a6ea328c..4f0cc9d457e0 100644
--- a/drivers/spi/spi_mpc8xxx.c
+++ b/drivers/spi/spi_mpc8xxx.c
@@ -365,7 +365,7 @@ int mpc8xxx_spi_setup_transfer(struct spi_device *spi, struct spi_transfer *t)
365 365
366 if ((mpc8xxx_spi->spibrg / hz) > 64) { 366 if ((mpc8xxx_spi->spibrg / hz) > 64) {
367 cs->hw_mode |= SPMODE_DIV16; 367 cs->hw_mode |= SPMODE_DIV16;
368 pm = mpc8xxx_spi->spibrg / (hz * 64); 368 pm = (mpc8xxx_spi->spibrg - 1) / (hz * 64) + 1;
369 369
370 WARN_ONCE(pm > 16, "%s: Requested speed is too low: %d Hz. " 370 WARN_ONCE(pm > 16, "%s: Requested speed is too low: %d Hz. "
371 "Will use %d Hz instead.\n", dev_name(&spi->dev), 371 "Will use %d Hz instead.\n", dev_name(&spi->dev),
@@ -373,7 +373,7 @@ int mpc8xxx_spi_setup_transfer(struct spi_device *spi, struct spi_transfer *t)
373 if (pm > 16) 373 if (pm > 16)
374 pm = 16; 374 pm = 16;
375 } else 375 } else
376 pm = mpc8xxx_spi->spibrg / (hz * 4); 376 pm = (mpc8xxx_spi->spibrg - 1) / (hz * 4) + 1;
377 if (pm) 377 if (pm)
378 pm--; 378 pm--;
379 379
@@ -1328,7 +1328,7 @@ static struct of_platform_driver of_mpc8xxx_spi_driver = {
1328static int __devinit plat_mpc8xxx_spi_probe(struct platform_device *pdev) 1328static int __devinit plat_mpc8xxx_spi_probe(struct platform_device *pdev)
1329{ 1329{
1330 struct resource *mem; 1330 struct resource *mem;
1331 unsigned int irq; 1331 int irq;
1332 struct spi_master *master; 1332 struct spi_master *master;
1333 1333
1334 if (!pdev->dev.platform_data) 1334 if (!pdev->dev.platform_data)
@@ -1339,7 +1339,7 @@ static int __devinit plat_mpc8xxx_spi_probe(struct platform_device *pdev)
1339 return -EINVAL; 1339 return -EINVAL;
1340 1340
1341 irq = platform_get_irq(pdev, 0); 1341 irq = platform_get_irq(pdev, 0);
1342 if (!irq) 1342 if (irq <= 0)
1343 return -EINVAL; 1343 return -EINVAL;
1344 1344
1345 master = mpc8xxx_spi_probe(&pdev->dev, mem, irq); 1345 master = mpc8xxx_spi_probe(&pdev->dev, mem, irq);
diff --git a/drivers/spi/spi_ppc4xx.c b/drivers/spi/spi_ppc4xx.c
index 140a18d6cf3e..6d8d4026a07a 100644
--- a/drivers/spi/spi_ppc4xx.c
+++ b/drivers/spi/spi_ppc4xx.c
@@ -578,7 +578,7 @@ static int __exit spi_ppc4xx_of_remove(struct of_device *op)
578 return 0; 578 return 0;
579} 579}
580 580
581static struct of_device_id spi_ppc4xx_of_match[] = { 581static const struct of_device_id spi_ppc4xx_of_match[] = {
582 { .compatible = "ibm,ppc4xx-spi", }, 582 { .compatible = "ibm,ppc4xx-spi", },
583 {}, 583 {},
584}; 584};
diff --git a/drivers/spi/spi_s3c64xx.c b/drivers/spi/spi_s3c64xx.c
index 88a456dba967..97365815a729 100644
--- a/drivers/spi/spi_s3c64xx.c
+++ b/drivers/spi/spi_s3c64xx.c
@@ -28,7 +28,7 @@
28#include <linux/spi/spi.h> 28#include <linux/spi/spi.h>
29 29
30#include <mach/dma.h> 30#include <mach/dma.h>
31#include <plat/spi.h> 31#include <plat/s3c64xx-spi.h>
32 32
33/* Registers and bit-fields */ 33/* Registers and bit-fields */
34 34
@@ -137,6 +137,7 @@
137/** 137/**
138 * struct s3c64xx_spi_driver_data - Runtime info holder for SPI driver. 138 * struct s3c64xx_spi_driver_data - Runtime info holder for SPI driver.
139 * @clk: Pointer to the spi clock. 139 * @clk: Pointer to the spi clock.
140 * @src_clk: Pointer to the clock used to generate SPI signals.
140 * @master: Pointer to the SPI Protocol master. 141 * @master: Pointer to the SPI Protocol master.
141 * @workqueue: Work queue for the SPI xfer requests. 142 * @workqueue: Work queue for the SPI xfer requests.
142 * @cntrlr_info: Platform specific data for the controller this driver manages. 143 * @cntrlr_info: Platform specific data for the controller this driver manages.
@@ -157,10 +158,11 @@
157struct s3c64xx_spi_driver_data { 158struct s3c64xx_spi_driver_data {
158 void __iomem *regs; 159 void __iomem *regs;
159 struct clk *clk; 160 struct clk *clk;
161 struct clk *src_clk;
160 struct platform_device *pdev; 162 struct platform_device *pdev;
161 struct spi_master *master; 163 struct spi_master *master;
162 struct workqueue_struct *workqueue; 164 struct workqueue_struct *workqueue;
163 struct s3c64xx_spi_cntrlr_info *cntrlr_info; 165 struct s3c64xx_spi_info *cntrlr_info;
164 struct spi_device *tgl_spi; 166 struct spi_device *tgl_spi;
165 struct work_struct work; 167 struct work_struct work;
166 struct list_head queue; 168 struct list_head queue;
@@ -180,7 +182,7 @@ static struct s3c2410_dma_client s3c64xx_spi_dma_client = {
180 182
181static void flush_fifo(struct s3c64xx_spi_driver_data *sdd) 183static void flush_fifo(struct s3c64xx_spi_driver_data *sdd)
182{ 184{
183 struct s3c64xx_spi_cntrlr_info *sci = sdd->cntrlr_info; 185 struct s3c64xx_spi_info *sci = sdd->cntrlr_info;
184 void __iomem *regs = sdd->regs; 186 void __iomem *regs = sdd->regs;
185 unsigned long loops; 187 unsigned long loops;
186 u32 val; 188 u32 val;
@@ -225,7 +227,7 @@ static void enable_datapath(struct s3c64xx_spi_driver_data *sdd,
225 struct spi_device *spi, 227 struct spi_device *spi,
226 struct spi_transfer *xfer, int dma_mode) 228 struct spi_transfer *xfer, int dma_mode)
227{ 229{
228 struct s3c64xx_spi_cntrlr_info *sci = sdd->cntrlr_info; 230 struct s3c64xx_spi_info *sci = sdd->cntrlr_info;
229 void __iomem *regs = sdd->regs; 231 void __iomem *regs = sdd->regs;
230 u32 modecfg, chcfg; 232 u32 modecfg, chcfg;
231 233
@@ -298,19 +300,20 @@ static inline void enable_cs(struct s3c64xx_spi_driver_data *sdd,
298 if (sdd->tgl_spi != spi) { /* if last mssg on diff device */ 300 if (sdd->tgl_spi != spi) { /* if last mssg on diff device */
299 /* Deselect the last toggled device */ 301 /* Deselect the last toggled device */
300 cs = sdd->tgl_spi->controller_data; 302 cs = sdd->tgl_spi->controller_data;
301 cs->set_level(spi->mode & SPI_CS_HIGH ? 0 : 1); 303 cs->set_level(cs->line,
304 spi->mode & SPI_CS_HIGH ? 0 : 1);
302 } 305 }
303 sdd->tgl_spi = NULL; 306 sdd->tgl_spi = NULL;
304 } 307 }
305 308
306 cs = spi->controller_data; 309 cs = spi->controller_data;
307 cs->set_level(spi->mode & SPI_CS_HIGH ? 1 : 0); 310 cs->set_level(cs->line, spi->mode & SPI_CS_HIGH ? 1 : 0);
308} 311}
309 312
310static int wait_for_xfer(struct s3c64xx_spi_driver_data *sdd, 313static int wait_for_xfer(struct s3c64xx_spi_driver_data *sdd,
311 struct spi_transfer *xfer, int dma_mode) 314 struct spi_transfer *xfer, int dma_mode)
312{ 315{
313 struct s3c64xx_spi_cntrlr_info *sci = sdd->cntrlr_info; 316 struct s3c64xx_spi_info *sci = sdd->cntrlr_info;
314 void __iomem *regs = sdd->regs; 317 void __iomem *regs = sdd->regs;
315 unsigned long val; 318 unsigned long val;
316 int ms; 319 int ms;
@@ -384,12 +387,11 @@ static inline void disable_cs(struct s3c64xx_spi_driver_data *sdd,
384 if (sdd->tgl_spi == spi) 387 if (sdd->tgl_spi == spi)
385 sdd->tgl_spi = NULL; 388 sdd->tgl_spi = NULL;
386 389
387 cs->set_level(spi->mode & SPI_CS_HIGH ? 0 : 1); 390 cs->set_level(cs->line, spi->mode & SPI_CS_HIGH ? 0 : 1);
388} 391}
389 392
390static void s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd) 393static void s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd)
391{ 394{
392 struct s3c64xx_spi_cntrlr_info *sci = sdd->cntrlr_info;
393 void __iomem *regs = sdd->regs; 395 void __iomem *regs = sdd->regs;
394 u32 val; 396 u32 val;
395 397
@@ -435,7 +437,7 @@ static void s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd)
435 /* Configure Clock */ 437 /* Configure Clock */
436 val = readl(regs + S3C64XX_SPI_CLK_CFG); 438 val = readl(regs + S3C64XX_SPI_CLK_CFG);
437 val &= ~S3C64XX_SPI_PSR_MASK; 439 val &= ~S3C64XX_SPI_PSR_MASK;
438 val |= ((clk_get_rate(sci->src_clk) / sdd->cur_speed / 2 - 1) 440 val |= ((clk_get_rate(sdd->src_clk) / sdd->cur_speed / 2 - 1)
439 & S3C64XX_SPI_PSR_MASK); 441 & S3C64XX_SPI_PSR_MASK);
440 writel(val, regs + S3C64XX_SPI_CLK_CFG); 442 writel(val, regs + S3C64XX_SPI_CLK_CFG);
441 443
@@ -558,7 +560,7 @@ static void s3c64xx_spi_unmap_mssg(struct s3c64xx_spi_driver_data *sdd,
558static void handle_msg(struct s3c64xx_spi_driver_data *sdd, 560static void handle_msg(struct s3c64xx_spi_driver_data *sdd,
559 struct spi_message *msg) 561 struct spi_message *msg)
560{ 562{
561 struct s3c64xx_spi_cntrlr_info *sci = sdd->cntrlr_info; 563 struct s3c64xx_spi_info *sci = sdd->cntrlr_info;
562 struct spi_device *spi = msg->spi; 564 struct spi_device *spi = msg->spi;
563 struct s3c64xx_spi_csinfo *cs = spi->controller_data; 565 struct s3c64xx_spi_csinfo *cs = spi->controller_data;
564 struct spi_transfer *xfer; 566 struct spi_transfer *xfer;
@@ -632,8 +634,8 @@ static void handle_msg(struct s3c64xx_spi_driver_data *sdd,
632 S3C64XX_SPI_DEACT(sdd); 634 S3C64XX_SPI_DEACT(sdd);
633 635
634 if (status) { 636 if (status) {
635 dev_err(&spi->dev, "I/O Error: \ 637 dev_err(&spi->dev, "I/O Error: "
636 rx-%d tx-%d res:rx-%c tx-%c len-%d\n", 638 "rx-%d tx-%d res:rx-%c tx-%c len-%d\n",
637 xfer->rx_buf ? 1 : 0, xfer->tx_buf ? 1 : 0, 639 xfer->rx_buf ? 1 : 0, xfer->tx_buf ? 1 : 0,
638 (sdd->state & RXBUSY) ? 'f' : 'p', 640 (sdd->state & RXBUSY) ? 'f' : 'p',
639 (sdd->state & TXBUSY) ? 'f' : 'p', 641 (sdd->state & TXBUSY) ? 'f' : 'p',
@@ -786,7 +788,7 @@ static int s3c64xx_spi_setup(struct spi_device *spi)
786{ 788{
787 struct s3c64xx_spi_csinfo *cs = spi->controller_data; 789 struct s3c64xx_spi_csinfo *cs = spi->controller_data;
788 struct s3c64xx_spi_driver_data *sdd; 790 struct s3c64xx_spi_driver_data *sdd;
789 struct s3c64xx_spi_cntrlr_info *sci; 791 struct s3c64xx_spi_info *sci;
790 struct spi_message *msg; 792 struct spi_message *msg;
791 u32 psr, speed; 793 u32 psr, speed;
792 unsigned long flags; 794 unsigned long flags;
@@ -831,17 +833,17 @@ static int s3c64xx_spi_setup(struct spi_device *spi)
831 } 833 }
832 834
833 /* Check if we can provide the requested rate */ 835 /* Check if we can provide the requested rate */
834 speed = clk_get_rate(sci->src_clk) / 2 / (0 + 1); /* Max possible */ 836 speed = clk_get_rate(sdd->src_clk) / 2 / (0 + 1); /* Max possible */
835 837
836 if (spi->max_speed_hz > speed) 838 if (spi->max_speed_hz > speed)
837 spi->max_speed_hz = speed; 839 spi->max_speed_hz = speed;
838 840
839 psr = clk_get_rate(sci->src_clk) / 2 / spi->max_speed_hz - 1; 841 psr = clk_get_rate(sdd->src_clk) / 2 / spi->max_speed_hz - 1;
840 psr &= S3C64XX_SPI_PSR_MASK; 842 psr &= S3C64XX_SPI_PSR_MASK;
841 if (psr == S3C64XX_SPI_PSR_MASK) 843 if (psr == S3C64XX_SPI_PSR_MASK)
842 psr--; 844 psr--;
843 845
844 speed = clk_get_rate(sci->src_clk) / 2 / (psr + 1); 846 speed = clk_get_rate(sdd->src_clk) / 2 / (psr + 1);
845 if (spi->max_speed_hz < speed) { 847 if (spi->max_speed_hz < speed) {
846 if (psr+1 < S3C64XX_SPI_PSR_MASK) { 848 if (psr+1 < S3C64XX_SPI_PSR_MASK) {
847 psr++; 849 psr++;
@@ -851,7 +853,7 @@ static int s3c64xx_spi_setup(struct spi_device *spi)
851 } 853 }
852 } 854 }
853 855
854 speed = clk_get_rate(sci->src_clk) / 2 / (psr + 1); 856 speed = clk_get_rate(sdd->src_clk) / 2 / (psr + 1);
855 if (spi->max_speed_hz >= speed) 857 if (spi->max_speed_hz >= speed)
856 spi->max_speed_hz = speed; 858 spi->max_speed_hz = speed;
857 else 859 else
@@ -867,7 +869,7 @@ setup_exit:
867 869
868static void s3c64xx_spi_hwinit(struct s3c64xx_spi_driver_data *sdd, int channel) 870static void s3c64xx_spi_hwinit(struct s3c64xx_spi_driver_data *sdd, int channel)
869{ 871{
870 struct s3c64xx_spi_cntrlr_info *sci = sdd->cntrlr_info; 872 struct s3c64xx_spi_info *sci = sdd->cntrlr_info;
871 void __iomem *regs = sdd->regs; 873 void __iomem *regs = sdd->regs;
872 unsigned int val; 874 unsigned int val;
873 875
@@ -902,7 +904,7 @@ static int __init s3c64xx_spi_probe(struct platform_device *pdev)
902{ 904{
903 struct resource *mem_res, *dmatx_res, *dmarx_res; 905 struct resource *mem_res, *dmatx_res, *dmarx_res;
904 struct s3c64xx_spi_driver_data *sdd; 906 struct s3c64xx_spi_driver_data *sdd;
905 struct s3c64xx_spi_cntrlr_info *sci; 907 struct s3c64xx_spi_info *sci;
906 struct spi_master *master; 908 struct spi_master *master;
907 int ret; 909 int ret;
908 910
@@ -1000,18 +1002,15 @@ static int __init s3c64xx_spi_probe(struct platform_device *pdev)
1000 goto err4; 1002 goto err4;
1001 } 1003 }
1002 1004
1003 if (sci->src_clk_nr == S3C64XX_SPI_SRCCLK_PCLK) 1005 sdd->src_clk = clk_get(&pdev->dev, sci->src_clk_name);
1004 sci->src_clk = sdd->clk; 1006 if (IS_ERR(sdd->src_clk)) {
1005 else
1006 sci->src_clk = clk_get(&pdev->dev, sci->src_clk_name);
1007 if (IS_ERR(sci->src_clk)) {
1008 dev_err(&pdev->dev, 1007 dev_err(&pdev->dev,
1009 "Unable to acquire clock '%s'\n", sci->src_clk_name); 1008 "Unable to acquire clock '%s'\n", sci->src_clk_name);
1010 ret = PTR_ERR(sci->src_clk); 1009 ret = PTR_ERR(sdd->src_clk);
1011 goto err5; 1010 goto err5;
1012 } 1011 }
1013 1012
1014 if (sci->src_clk != sdd->clk && clk_enable(sci->src_clk)) { 1013 if (clk_enable(sdd->src_clk)) {
1015 dev_err(&pdev->dev, "Couldn't enable clock '%s'\n", 1014 dev_err(&pdev->dev, "Couldn't enable clock '%s'\n",
1016 sci->src_clk_name); 1015 sci->src_clk_name);
1017 ret = -EBUSY; 1016 ret = -EBUSY;
@@ -1040,11 +1039,10 @@ static int __init s3c64xx_spi_probe(struct platform_device *pdev)
1040 goto err8; 1039 goto err8;
1041 } 1040 }
1042 1041
1043 dev_dbg(&pdev->dev, "Samsung SoC SPI Driver loaded for Bus SPI-%d \ 1042 dev_dbg(&pdev->dev, "Samsung SoC SPI Driver loaded for Bus SPI-%d "
1044 with %d Slaves attached\n", 1043 "with %d Slaves attached\n",
1045 pdev->id, master->num_chipselect); 1044 pdev->id, master->num_chipselect);
1046 dev_dbg(&pdev->dev, "\tIOmem=[0x%x-0x%x]\ 1045 dev_dbg(&pdev->dev, "\tIOmem=[0x%x-0x%x]\tDMA=[Rx-%d, Tx-%d]\n",
1047 \tDMA=[Rx-%d, Tx-%d]\n",
1048 mem_res->end, mem_res->start, 1046 mem_res->end, mem_res->start,
1049 sdd->rx_dmach, sdd->tx_dmach); 1047 sdd->rx_dmach, sdd->tx_dmach);
1050 1048
@@ -1053,11 +1051,9 @@ static int __init s3c64xx_spi_probe(struct platform_device *pdev)
1053err8: 1051err8:
1054 destroy_workqueue(sdd->workqueue); 1052 destroy_workqueue(sdd->workqueue);
1055err7: 1053err7:
1056 if (sci->src_clk != sdd->clk) 1054 clk_disable(sdd->src_clk);
1057 clk_disable(sci->src_clk);
1058err6: 1055err6:
1059 if (sci->src_clk != sdd->clk) 1056 clk_put(sdd->src_clk);
1060 clk_put(sci->src_clk);
1061err5: 1057err5:
1062 clk_disable(sdd->clk); 1058 clk_disable(sdd->clk);
1063err4: 1059err4:
@@ -1078,7 +1074,6 @@ static int s3c64xx_spi_remove(struct platform_device *pdev)
1078{ 1074{
1079 struct spi_master *master = spi_master_get(platform_get_drvdata(pdev)); 1075 struct spi_master *master = spi_master_get(platform_get_drvdata(pdev));
1080 struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master); 1076 struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master);
1081 struct s3c64xx_spi_cntrlr_info *sci = sdd->cntrlr_info;
1082 struct resource *mem_res; 1077 struct resource *mem_res;
1083 unsigned long flags; 1078 unsigned long flags;
1084 1079
@@ -1093,11 +1088,8 @@ static int s3c64xx_spi_remove(struct platform_device *pdev)
1093 1088
1094 destroy_workqueue(sdd->workqueue); 1089 destroy_workqueue(sdd->workqueue);
1095 1090
1096 if (sci->src_clk != sdd->clk) 1091 clk_disable(sdd->src_clk);
1097 clk_disable(sci->src_clk); 1092 clk_put(sdd->src_clk);
1098
1099 if (sci->src_clk != sdd->clk)
1100 clk_put(sci->src_clk);
1101 1093
1102 clk_disable(sdd->clk); 1094 clk_disable(sdd->clk);
1103 clk_put(sdd->clk); 1095 clk_put(sdd->clk);
@@ -1105,7 +1097,8 @@ static int s3c64xx_spi_remove(struct platform_device *pdev)
1105 iounmap((void *) sdd->regs); 1097 iounmap((void *) sdd->regs);
1106 1098
1107 mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1099 mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1108 release_mem_region(mem_res->start, resource_size(mem_res)); 1100 if (mem_res != NULL)
1101 release_mem_region(mem_res->start, resource_size(mem_res));
1109 1102
1110 platform_set_drvdata(pdev, NULL); 1103 platform_set_drvdata(pdev, NULL);
1111 spi_master_put(master); 1104 spi_master_put(master);
@@ -1118,8 +1111,6 @@ static int s3c64xx_spi_suspend(struct platform_device *pdev, pm_message_t state)
1118{ 1111{
1119 struct spi_master *master = spi_master_get(platform_get_drvdata(pdev)); 1112 struct spi_master *master = spi_master_get(platform_get_drvdata(pdev));
1120 struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master); 1113 struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master);
1121 struct s3c64xx_spi_cntrlr_info *sci = sdd->cntrlr_info;
1122 struct s3c64xx_spi_csinfo *cs;
1123 unsigned long flags; 1114 unsigned long flags;
1124 1115
1125 spin_lock_irqsave(&sdd->lock, flags); 1116 spin_lock_irqsave(&sdd->lock, flags);
@@ -1130,9 +1121,7 @@ static int s3c64xx_spi_suspend(struct platform_device *pdev, pm_message_t state)
1130 msleep(10); 1121 msleep(10);
1131 1122
1132 /* Disable the clock */ 1123 /* Disable the clock */
1133 if (sci->src_clk != sdd->clk) 1124 clk_disable(sdd->src_clk);
1134 clk_disable(sci->src_clk);
1135
1136 clk_disable(sdd->clk); 1125 clk_disable(sdd->clk);
1137 1126
1138 sdd->cur_speed = 0; /* Output Clock is stopped */ 1127 sdd->cur_speed = 0; /* Output Clock is stopped */
@@ -1144,15 +1133,13 @@ static int s3c64xx_spi_resume(struct platform_device *pdev)
1144{ 1133{
1145 struct spi_master *master = spi_master_get(platform_get_drvdata(pdev)); 1134 struct spi_master *master = spi_master_get(platform_get_drvdata(pdev));
1146 struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master); 1135 struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master);
1147 struct s3c64xx_spi_cntrlr_info *sci = sdd->cntrlr_info; 1136 struct s3c64xx_spi_info *sci = sdd->cntrlr_info;
1148 unsigned long flags; 1137 unsigned long flags;
1149 1138
1150 sci->cfg_gpio(pdev); 1139 sci->cfg_gpio(pdev);
1151 1140
1152 /* Enable the clock */ 1141 /* Enable the clock */
1153 if (sci->src_clk != sdd->clk) 1142 clk_enable(sdd->src_clk);
1154 clk_enable(sci->src_clk);
1155
1156 clk_enable(sdd->clk); 1143 clk_enable(sdd->clk);
1157 1144
1158 s3c64xx_spi_hwinit(sdd, pdev->id); 1145 s3c64xx_spi_hwinit(sdd, pdev->id);
diff --git a/drivers/spi/spi_sh_msiof.c b/drivers/spi/spi_sh_msiof.c
index 30973ec16a93..d93b66743ba7 100644
--- a/drivers/spi/spi_sh_msiof.c
+++ b/drivers/spi/spi_sh_msiof.c
@@ -20,12 +20,12 @@
20#include <linux/bitmap.h> 20#include <linux/bitmap.h>
21#include <linux/clk.h> 21#include <linux/clk.h>
22#include <linux/io.h> 22#include <linux/io.h>
23#include <linux/err.h>
23 24
24#include <linux/spi/spi.h> 25#include <linux/spi/spi.h>
25#include <linux/spi/spi_bitbang.h> 26#include <linux/spi/spi_bitbang.h>
26#include <linux/spi/sh_msiof.h> 27#include <linux/spi/sh_msiof.h>
27 28
28#include <asm/spi.h>
29#include <asm/unaligned.h> 29#include <asm/unaligned.h>
30 30
31struct sh_msiof_spi_priv { 31struct sh_msiof_spi_priv {
diff --git a/drivers/spi/spi_stmp.c b/drivers/spi/spi_stmp.c
index 2552bb364005..fadff76eb7e0 100644
--- a/drivers/spi/spi_stmp.c
+++ b/drivers/spi/spi_stmp.c
@@ -76,7 +76,7 @@ struct stmp_spi {
76 break; \ 76 break; \
77 } \ 77 } \
78 cpu_relax(); \ 78 cpu_relax(); \
79 } while (time_before(end_jiffies, jiffies)); \ 79 } while (time_before(jiffies, end_jiffies)); \
80 succeeded; \ 80 succeeded; \
81 }) 81 })
82 82
diff --git a/drivers/spi/xilinx_spi.c b/drivers/spi/xilinx_spi.c
index 9f386379c169..1b47363cb73f 100644
--- a/drivers/spi/xilinx_spi.c
+++ b/drivers/spi/xilinx_spi.c
@@ -93,6 +93,26 @@ struct xilinx_spi {
93 void (*rx_fn) (struct xilinx_spi *); 93 void (*rx_fn) (struct xilinx_spi *);
94}; 94};
95 95
96static void xspi_write32(u32 val, void __iomem *addr)
97{
98 iowrite32(val, addr);
99}
100
101static unsigned int xspi_read32(void __iomem *addr)
102{
103 return ioread32(addr);
104}
105
106static void xspi_write32_be(u32 val, void __iomem *addr)
107{
108 iowrite32be(val, addr);
109}
110
111static unsigned int xspi_read32_be(void __iomem *addr)
112{
113 return ioread32be(addr);
114}
115
96static void xspi_tx8(struct xilinx_spi *xspi) 116static void xspi_tx8(struct xilinx_spi *xspi)
97{ 117{
98 xspi->write_fn(*xspi->tx_ptr, xspi->regs + XSPI_TXD_OFFSET); 118 xspi->write_fn(*xspi->tx_ptr, xspi->regs + XSPI_TXD_OFFSET);
@@ -374,11 +394,11 @@ struct spi_master *xilinx_spi_init(struct device *dev, struct resource *mem,
374 xspi->mem = *mem; 394 xspi->mem = *mem;
375 xspi->irq = irq; 395 xspi->irq = irq;
376 if (pdata->little_endian) { 396 if (pdata->little_endian) {
377 xspi->read_fn = ioread32; 397 xspi->read_fn = xspi_read32;
378 xspi->write_fn = iowrite32; 398 xspi->write_fn = xspi_write32;
379 } else { 399 } else {
380 xspi->read_fn = ioread32be; 400 xspi->read_fn = xspi_read32_be;
381 xspi->write_fn = iowrite32be; 401 xspi->write_fn = xspi_write32_be;
382 } 402 }
383 xspi->bits_per_word = pdata->bits_per_word; 403 xspi->bits_per_word = pdata->bits_per_word;
384 if (xspi->bits_per_word == 8) { 404 if (xspi->bits_per_word == 8) {
diff --git a/drivers/spi/xilinx_spi_of.c b/drivers/spi/xilinx_spi_of.c
index 71dc3adc0495..ed34a8d419c7 100644
--- a/drivers/spi/xilinx_spi_of.c
+++ b/drivers/spi/xilinx_spi_of.c
@@ -99,7 +99,7 @@ static int __exit xilinx_spi_of_remove(struct of_device *op)
99 return xilinx_spi_remove(op); 99 return xilinx_spi_remove(op);
100} 100}
101 101
102static struct of_device_id xilinx_spi_of_match[] = { 102static const struct of_device_id xilinx_spi_of_match[] = {
103 { .compatible = "xlnx,xps-spi-2.00.a", }, 103 { .compatible = "xlnx,xps-spi-2.00.a", },
104 { .compatible = "xlnx,xps-spi-2.00.b", }, 104 { .compatible = "xlnx,xps-spi-2.00.b", },
105 {} 105 {}
generated by cgit v1.2.2 (git 2.25.0) at 2024-09-21 00:48:51 -0400