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Kumar Galaccf06992006-05-20 15:00:15 -07001/*
Mingkai Hub36ece82010-10-12 18:18:31 +08002 * Freescale SPI controller driver.
Kumar Galaccf06992006-05-20 15:00:15 -07003 *
4 * Maintainer: Kumar Gala
5 *
6 * Copyright (C) 2006 Polycom, Inc.
Mingkai Hub36ece82010-10-12 18:18:31 +08007 * Copyright 2010 Freescale Semiconductor, Inc.
Kumar Galaccf06992006-05-20 15:00:15 -07008 *
Anton Vorontsov4c1fba42009-10-12 20:49:27 +04009 * CPM SPI and QE buffer descriptors mode support:
10 * Copyright (c) 2009 MontaVista Software, Inc.
11 * Author: Anton Vorontsov <avorontsov@ru.mvista.com>
12 *
Kumar Galaccf06992006-05-20 15:00:15 -070013 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
17 */
18#include <linux/module.h>
Kumar Galaccf06992006-05-20 15:00:15 -070019#include <linux/types.h>
20#include <linux/kernel.h>
Kumar Galaccf06992006-05-20 15:00:15 -070021#include <linux/interrupt.h>
22#include <linux/delay.h>
23#include <linux/irq.h>
Kumar Galaccf06992006-05-20 15:00:15 -070024#include <linux/spi/spi.h>
25#include <linux/spi/spi_bitbang.h>
26#include <linux/platform_device.h>
27#include <linux/fsl_devices.h>
Anton Vorontsov4c1fba42009-10-12 20:49:27 +040028#include <linux/dma-mapping.h>
29#include <linux/mm.h>
30#include <linux/mutex.h>
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -070031#include <linux/of.h>
32#include <linux/of_platform.h>
33#include <linux/gpio.h>
34#include <linux/of_gpio.h>
Kumar Galaccf06992006-05-20 15:00:15 -070035
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -070036#include <sysdev/fsl_soc.h>
Anton Vorontsov4c1fba42009-10-12 20:49:27 +040037#include <asm/cpm.h>
38#include <asm/qe.h>
Mingkai Hub36ece82010-10-12 18:18:31 +080039
Grant Likelyca632f52011-06-06 01:16:30 -060040#include "spi-fsl-lib.h"
Kumar Galaccf06992006-05-20 15:00:15 -070041
Anton Vorontsov4c1fba42009-10-12 20:49:27 +040042/* CPM1 and CPM2 are mutually exclusive. */
43#ifdef CONFIG_CPM1
44#include <asm/cpm1.h>
45#define CPM_SPI_CMD mk_cr_cmd(CPM_CR_CH_SPI, 0)
46#else
47#include <asm/cpm2.h>
48#define CPM_SPI_CMD mk_cr_cmd(CPM_CR_SPI_PAGE, CPM_CR_SPI_SBLOCK, 0, 0)
49#endif
50
Kumar Galaccf06992006-05-20 15:00:15 -070051/* SPI Controller registers */
Mingkai Hub36ece82010-10-12 18:18:31 +080052struct fsl_spi_reg {
Kumar Galaccf06992006-05-20 15:00:15 -070053 u8 res1[0x20];
54 __be32 mode;
55 __be32 event;
56 __be32 mask;
57 __be32 command;
58 __be32 transmit;
59 __be32 receive;
60};
61
62/* SPI Controller mode register definitions */
Anton Vorontsov2a485d72007-07-31 00:38:45 -070063#define SPMODE_LOOP (1 << 30)
Kumar Galaccf06992006-05-20 15:00:15 -070064#define SPMODE_CI_INACTIVEHIGH (1 << 29)
65#define SPMODE_CP_BEGIN_EDGECLK (1 << 28)
66#define SPMODE_DIV16 (1 << 27)
67#define SPMODE_REV (1 << 26)
68#define SPMODE_MS (1 << 25)
69#define SPMODE_ENABLE (1 << 24)
70#define SPMODE_LEN(x) ((x) << 20)
71#define SPMODE_PM(x) ((x) << 16)
Joakim Tjernlundf29ba282007-07-17 04:04:12 -070072#define SPMODE_OP (1 << 14)
Joakim Tjernlundc9bfcb32008-05-12 14:02:30 -070073#define SPMODE_CG(x) ((x) << 7)
Kumar Galaccf06992006-05-20 15:00:15 -070074
75/*
76 * Default for SPI Mode:
Mingkai Hub36ece82010-10-12 18:18:31 +080077 * SPI MODE 0 (inactive low, phase middle, MSB, 8-bit length, slow clk
Kumar Galaccf06992006-05-20 15:00:15 -070078 */
79#define SPMODE_INIT_VAL (SPMODE_CI_INACTIVEHIGH | SPMODE_DIV16 | SPMODE_REV | \
80 SPMODE_MS | SPMODE_LEN(7) | SPMODE_PM(0xf))
81
82/* SPIE register values */
83#define SPIE_NE 0x00000200 /* Not empty */
84#define SPIE_NF 0x00000100 /* Not full */
85
86/* SPIM register values */
87#define SPIM_NE 0x00000200 /* Not empty */
88#define SPIM_NF 0x00000100 /* Not full */
89
Anton Vorontsov4c1fba42009-10-12 20:49:27 +040090#define SPIE_TXB 0x00000200 /* Last char is written to tx fifo */
91#define SPIE_RXB 0x00000100 /* Last char is written to rx buf */
92
93/* SPCOM register values */
94#define SPCOM_STR (1 << 23) /* Start transmit */
95
96#define SPI_PRAM_SIZE 0x100
97#define SPI_MRBLR ((unsigned int)PAGE_SIZE)
98
Mingkai Hub36ece82010-10-12 18:18:31 +080099static void *fsl_dummy_rx;
100static DEFINE_MUTEX(fsl_dummy_rx_lock);
101static int fsl_dummy_rx_refcnt;
Kumar Galaccf06992006-05-20 15:00:15 -0700102
Mingkai Hub36ece82010-10-12 18:18:31 +0800103static void fsl_spi_change_mode(struct spi_device *spi)
Anton Vorontsova35c1712009-10-12 20:49:24 +0400104{
105 struct mpc8xxx_spi *mspi = spi_master_get_devdata(spi->master);
106 struct spi_mpc8xxx_cs *cs = spi->controller_state;
Mingkai Hub36ece82010-10-12 18:18:31 +0800107 struct fsl_spi_reg *reg_base = mspi->reg_base;
108 __be32 __iomem *mode = &reg_base->mode;
Anton Vorontsova35c1712009-10-12 20:49:24 +0400109 unsigned long flags;
110
111 if (cs->hw_mode == mpc8xxx_spi_read_reg(mode))
112 return;
113
114 /* Turn off IRQs locally to minimize time that SPI is disabled. */
115 local_irq_save(flags);
116
117 /* Turn off SPI unit prior changing mode */
118 mpc8xxx_spi_write_reg(mode, cs->hw_mode & ~SPMODE_ENABLE);
Anton Vorontsova35c1712009-10-12 20:49:24 +0400119
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400120 /* When in CPM mode, we need to reinit tx and rx. */
121 if (mspi->flags & SPI_CPM_MODE) {
122 if (mspi->flags & SPI_QE) {
123 qe_issue_cmd(QE_INIT_TX_RX, mspi->subblock,
124 QE_CR_PROTOCOL_UNSPECIFIED, 0);
125 } else {
126 cpm_command(CPM_SPI_CMD, CPM_CR_INIT_TRX);
127 if (mspi->flags & SPI_CPM1) {
128 out_be16(&mspi->pram->rbptr,
129 in_be16(&mspi->pram->rbase));
130 out_be16(&mspi->pram->tbptr,
131 in_be16(&mspi->pram->tbase));
132 }
133 }
134 }
Joakim Tjernlundf9218c22010-05-22 02:18:02 -0600135 mpc8xxx_spi_write_reg(mode, cs->hw_mode);
Anton Vorontsova35c1712009-10-12 20:49:24 +0400136 local_irq_restore(flags);
137}
138
Mingkai Hub36ece82010-10-12 18:18:31 +0800139static void fsl_spi_chipselect(struct spi_device *spi, int value)
Kumar Galaccf06992006-05-20 15:00:15 -0700140{
Anton Vorontsov575c5802009-06-18 16:49:08 -0700141 struct mpc8xxx_spi *mpc8xxx_spi = spi_master_get_devdata(spi->master);
Kenth Eriksson5039a862012-03-30 17:05:30 +0200142 struct fsl_spi_platform_data *pdata;
Anton Vorontsov364fdbc2009-03-31 15:24:36 -0700143 bool pol = spi->mode & SPI_CS_HIGH;
Anton Vorontsov575c5802009-06-18 16:49:08 -0700144 struct spi_mpc8xxx_cs *cs = spi->controller_state;
Kumar Galaccf06992006-05-20 15:00:15 -0700145
Kenth Eriksson5039a862012-03-30 17:05:30 +0200146 pdata = spi->dev.parent->parent->platform_data;
147
Kumar Galaccf06992006-05-20 15:00:15 -0700148 if (value == BITBANG_CS_INACTIVE) {
Anton Vorontsov364fdbc2009-03-31 15:24:36 -0700149 if (pdata->cs_control)
150 pdata->cs_control(spi, !pol);
Kumar Galaccf06992006-05-20 15:00:15 -0700151 }
152
153 if (value == BITBANG_CS_ACTIVE) {
Anton Vorontsov575c5802009-06-18 16:49:08 -0700154 mpc8xxx_spi->rx_shift = cs->rx_shift;
155 mpc8xxx_spi->tx_shift = cs->tx_shift;
156 mpc8xxx_spi->get_rx = cs->get_rx;
157 mpc8xxx_spi->get_tx = cs->get_tx;
Kumar Galaccf06992006-05-20 15:00:15 -0700158
Mingkai Hub36ece82010-10-12 18:18:31 +0800159 fsl_spi_change_mode(spi);
Kumar Galaccf06992006-05-20 15:00:15 -0700160
Anton Vorontsov364fdbc2009-03-31 15:24:36 -0700161 if (pdata->cs_control)
162 pdata->cs_control(spi, pol);
Kumar Galaccf06992006-05-20 15:00:15 -0700163 }
164}
165
Mingkai Hub36ece82010-10-12 18:18:31 +0800166static int mspi_apply_cpu_mode_quirks(struct spi_mpc8xxx_cs *cs,
167 struct spi_device *spi,
168 struct mpc8xxx_spi *mpc8xxx_spi,
169 int bits_per_word)
Joakim Tjernlund0398fb72010-05-14 09:14:26 +0000170{
171 cs->rx_shift = 0;
172 cs->tx_shift = 0;
173 if (bits_per_word <= 8) {
174 cs->get_rx = mpc8xxx_spi_rx_buf_u8;
175 cs->get_tx = mpc8xxx_spi_tx_buf_u8;
176 if (mpc8xxx_spi->flags & SPI_QE_CPU_MODE) {
177 cs->rx_shift = 16;
178 cs->tx_shift = 24;
179 }
180 } else if (bits_per_word <= 16) {
181 cs->get_rx = mpc8xxx_spi_rx_buf_u16;
182 cs->get_tx = mpc8xxx_spi_tx_buf_u16;
183 if (mpc8xxx_spi->flags & SPI_QE_CPU_MODE) {
184 cs->rx_shift = 16;
185 cs->tx_shift = 16;
186 }
187 } else if (bits_per_word <= 32) {
188 cs->get_rx = mpc8xxx_spi_rx_buf_u32;
189 cs->get_tx = mpc8xxx_spi_tx_buf_u32;
190 } else
191 return -EINVAL;
192
193 if (mpc8xxx_spi->flags & SPI_QE_CPU_MODE &&
194 spi->mode & SPI_LSB_FIRST) {
195 cs->tx_shift = 0;
196 if (bits_per_word <= 8)
197 cs->rx_shift = 8;
198 else
199 cs->rx_shift = 0;
200 }
201 mpc8xxx_spi->rx_shift = cs->rx_shift;
202 mpc8xxx_spi->tx_shift = cs->tx_shift;
203 mpc8xxx_spi->get_rx = cs->get_rx;
204 mpc8xxx_spi->get_tx = cs->get_tx;
205
206 return bits_per_word;
207}
208
Mingkai Hub36ece82010-10-12 18:18:31 +0800209static int mspi_apply_qe_mode_quirks(struct spi_mpc8xxx_cs *cs,
210 struct spi_device *spi,
211 int bits_per_word)
Joakim Tjernlund0398fb72010-05-14 09:14:26 +0000212{
213 /* QE uses Little Endian for words > 8
214 * so transform all words > 8 into 8 bits
215 * Unfortnatly that doesn't work for LSB so
216 * reject these for now */
217 /* Note: 32 bits word, LSB works iff
218 * tfcr/rfcr is set to CPMFCR_GBL */
219 if (spi->mode & SPI_LSB_FIRST &&
220 bits_per_word > 8)
221 return -EINVAL;
222 if (bits_per_word > 8)
223 return 8; /* pretend its 8 bits */
224 return bits_per_word;
225}
226
Mingkai Hub36ece82010-10-12 18:18:31 +0800227static int fsl_spi_setup_transfer(struct spi_device *spi,
228 struct spi_transfer *t)
Kumar Galaccf06992006-05-20 15:00:15 -0700229{
Anton Vorontsov575c5802009-06-18 16:49:08 -0700230 struct mpc8xxx_spi *mpc8xxx_spi;
Mingkai Hub36ece82010-10-12 18:18:31 +0800231 int bits_per_word = 0;
Joakim Tjernlund0398fb72010-05-14 09:14:26 +0000232 u8 pm;
Mingkai Hub36ece82010-10-12 18:18:31 +0800233 u32 hz = 0;
Anton Vorontsov575c5802009-06-18 16:49:08 -0700234 struct spi_mpc8xxx_cs *cs = spi->controller_state;
Kumar Galaccf06992006-05-20 15:00:15 -0700235
Anton Vorontsov575c5802009-06-18 16:49:08 -0700236 mpc8xxx_spi = spi_master_get_devdata(spi->master);
Kumar Galaccf06992006-05-20 15:00:15 -0700237
238 if (t) {
239 bits_per_word = t->bits_per_word;
240 hz = t->speed_hz;
Kumar Galaccf06992006-05-20 15:00:15 -0700241 }
242
243 /* spi_transfer level calls that work per-word */
244 if (!bits_per_word)
245 bits_per_word = spi->bits_per_word;
246
247 /* Make sure its a bit width we support [4..16, 32] */
248 if ((bits_per_word < 4)
249 || ((bits_per_word > 16) && (bits_per_word != 32)))
250 return -EINVAL;
251
Joakim Tjernlundc9bfcb32008-05-12 14:02:30 -0700252 if (!hz)
253 hz = spi->max_speed_hz;
254
Joakim Tjernlund0398fb72010-05-14 09:14:26 +0000255 if (!(mpc8xxx_spi->flags & SPI_CPM_MODE))
256 bits_per_word = mspi_apply_cpu_mode_quirks(cs, spi,
257 mpc8xxx_spi,
258 bits_per_word);
259 else if (mpc8xxx_spi->flags & SPI_QE)
260 bits_per_word = mspi_apply_qe_mode_quirks(cs, spi,
261 bits_per_word);
Kumar Galaccf06992006-05-20 15:00:15 -0700262
Joakim Tjernlund0398fb72010-05-14 09:14:26 +0000263 if (bits_per_word < 0)
264 return bits_per_word;
Kumar Galaccf06992006-05-20 15:00:15 -0700265
266 if (bits_per_word == 32)
267 bits_per_word = 0;
268 else
269 bits_per_word = bits_per_word - 1;
270
Anton Vorontsov32421da2007-07-31 00:38:41 -0700271 /* mask out bits we are going to set */
Joakim Tjernlundc9bfcb32008-05-12 14:02:30 -0700272 cs->hw_mode &= ~(SPMODE_LEN(0xF) | SPMODE_DIV16
273 | SPMODE_PM(0xF));
Kumar Galaccf06992006-05-20 15:00:15 -0700274
Joakim Tjernlundc9bfcb32008-05-12 14:02:30 -0700275 cs->hw_mode |= SPMODE_LEN(bits_per_word);
Kumar Galaccf06992006-05-20 15:00:15 -0700276
Anton Vorontsov575c5802009-06-18 16:49:08 -0700277 if ((mpc8xxx_spi->spibrg / hz) > 64) {
Peter Korsgaard53604db2008-09-13 02:33:14 -0700278 cs->hw_mode |= SPMODE_DIV16;
Ernst Schwab4f4517c2010-02-16 21:02:57 -0700279 pm = (mpc8xxx_spi->spibrg - 1) / (hz * 64) + 1;
Anton Vorontsovfd8a11e2009-06-18 16:49:01 -0700280
281 WARN_ONCE(pm > 16, "%s: Requested speed is too low: %d Hz. "
282 "Will use %d Hz instead.\n", dev_name(&spi->dev),
Anton Vorontsov575c5802009-06-18 16:49:08 -0700283 hz, mpc8xxx_spi->spibrg / 1024);
Anton Vorontsovfd8a11e2009-06-18 16:49:01 -0700284 if (pm > 16)
Peter Korsgaard53604db2008-09-13 02:33:14 -0700285 pm = 16;
Mingkai Hub36ece82010-10-12 18:18:31 +0800286 } else {
Ernst Schwab4f4517c2010-02-16 21:02:57 -0700287 pm = (mpc8xxx_spi->spibrg - 1) / (hz * 4) + 1;
Mingkai Hub36ece82010-10-12 18:18:31 +0800288 }
Chen Gonga61f5342008-07-23 21:29:52 -0700289 if (pm)
290 pm--;
291
292 cs->hw_mode |= SPMODE_PM(pm);
David Brownelldccd5732007-07-17 04:04:02 -0700293
Mingkai Hub36ece82010-10-12 18:18:31 +0800294 fsl_spi_change_mode(spi);
Kumar Galaccf06992006-05-20 15:00:15 -0700295 return 0;
296}
297
Mingkai Hub36ece82010-10-12 18:18:31 +0800298static void fsl_spi_cpm_bufs_start(struct mpc8xxx_spi *mspi)
Kumar Galaccf06992006-05-20 15:00:15 -0700299{
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400300 struct cpm_buf_desc __iomem *tx_bd = mspi->tx_bd;
301 struct cpm_buf_desc __iomem *rx_bd = mspi->rx_bd;
302 unsigned int xfer_len = min(mspi->count, SPI_MRBLR);
303 unsigned int xfer_ofs;
Mingkai Hub36ece82010-10-12 18:18:31 +0800304 struct fsl_spi_reg *reg_base = mspi->reg_base;
Kumar Galaccf06992006-05-20 15:00:15 -0700305
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400306 xfer_ofs = mspi->xfer_in_progress->len - mspi->count;
Kumar Galaccf06992006-05-20 15:00:15 -0700307
christophe leroy37880c92010-09-16 09:05:25 +0200308 if (mspi->rx_dma == mspi->dma_dummy_rx)
309 out_be32(&rx_bd->cbd_bufaddr, mspi->rx_dma);
310 else
311 out_be32(&rx_bd->cbd_bufaddr, mspi->rx_dma + xfer_ofs);
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400312 out_be16(&rx_bd->cbd_datlen, 0);
313 out_be16(&rx_bd->cbd_sc, BD_SC_EMPTY | BD_SC_INTRPT | BD_SC_WRAP);
314
christophe leroy37880c92010-09-16 09:05:25 +0200315 if (mspi->tx_dma == mspi->dma_dummy_tx)
316 out_be32(&tx_bd->cbd_bufaddr, mspi->tx_dma);
317 else
318 out_be32(&tx_bd->cbd_bufaddr, mspi->tx_dma + xfer_ofs);
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400319 out_be16(&tx_bd->cbd_datlen, xfer_len);
320 out_be16(&tx_bd->cbd_sc, BD_SC_READY | BD_SC_INTRPT | BD_SC_WRAP |
321 BD_SC_LAST);
322
323 /* start transfer */
Mingkai Hub36ece82010-10-12 18:18:31 +0800324 mpc8xxx_spi_write_reg(&reg_base->command, SPCOM_STR);
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400325}
326
Mingkai Hub36ece82010-10-12 18:18:31 +0800327static int fsl_spi_cpm_bufs(struct mpc8xxx_spi *mspi,
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400328 struct spi_transfer *t, bool is_dma_mapped)
329{
330 struct device *dev = mspi->dev;
Mingkai Hub36ece82010-10-12 18:18:31 +0800331 struct fsl_spi_reg *reg_base = mspi->reg_base;
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400332
333 if (is_dma_mapped) {
334 mspi->map_tx_dma = 0;
335 mspi->map_rx_dma = 0;
336 } else {
337 mspi->map_tx_dma = 1;
338 mspi->map_rx_dma = 1;
339 }
340
341 if (!t->tx_buf) {
342 mspi->tx_dma = mspi->dma_dummy_tx;
343 mspi->map_tx_dma = 0;
344 }
345
346 if (!t->rx_buf) {
347 mspi->rx_dma = mspi->dma_dummy_rx;
348 mspi->map_rx_dma = 0;
349 }
350
351 if (mspi->map_tx_dma) {
352 void *nonconst_tx = (void *)mspi->tx; /* shut up gcc */
353
354 mspi->tx_dma = dma_map_single(dev, nonconst_tx, t->len,
355 DMA_TO_DEVICE);
356 if (dma_mapping_error(dev, mspi->tx_dma)) {
357 dev_err(dev, "unable to map tx dma\n");
358 return -ENOMEM;
359 }
Joakim Tjernlundf9218c22010-05-22 02:18:02 -0600360 } else if (t->tx_buf) {
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400361 mspi->tx_dma = t->tx_dma;
362 }
363
364 if (mspi->map_rx_dma) {
365 mspi->rx_dma = dma_map_single(dev, mspi->rx, t->len,
366 DMA_FROM_DEVICE);
367 if (dma_mapping_error(dev, mspi->rx_dma)) {
368 dev_err(dev, "unable to map rx dma\n");
369 goto err_rx_dma;
370 }
Joakim Tjernlundf9218c22010-05-22 02:18:02 -0600371 } else if (t->rx_buf) {
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400372 mspi->rx_dma = t->rx_dma;
373 }
374
375 /* enable rx ints */
Mingkai Hub36ece82010-10-12 18:18:31 +0800376 mpc8xxx_spi_write_reg(&reg_base->mask, SPIE_RXB);
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400377
378 mspi->xfer_in_progress = t;
379 mspi->count = t->len;
380
381 /* start CPM transfers */
Mingkai Hub36ece82010-10-12 18:18:31 +0800382 fsl_spi_cpm_bufs_start(mspi);
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400383
384 return 0;
385
386err_rx_dma:
387 if (mspi->map_tx_dma)
388 dma_unmap_single(dev, mspi->tx_dma, t->len, DMA_TO_DEVICE);
389 return -ENOMEM;
390}
391
Mingkai Hub36ece82010-10-12 18:18:31 +0800392static void fsl_spi_cpm_bufs_complete(struct mpc8xxx_spi *mspi)
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400393{
394 struct device *dev = mspi->dev;
395 struct spi_transfer *t = mspi->xfer_in_progress;
396
397 if (mspi->map_tx_dma)
398 dma_unmap_single(dev, mspi->tx_dma, t->len, DMA_TO_DEVICE);
Joakim Tjernlund338ff292010-05-17 13:17:10 +0000399 if (mspi->map_rx_dma)
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400400 dma_unmap_single(dev, mspi->rx_dma, t->len, DMA_FROM_DEVICE);
401 mspi->xfer_in_progress = NULL;
402}
403
Mingkai Hub36ece82010-10-12 18:18:31 +0800404static int fsl_spi_cpu_bufs(struct mpc8xxx_spi *mspi,
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400405 struct spi_transfer *t, unsigned int len)
406{
407 u32 word;
Mingkai Hub36ece82010-10-12 18:18:31 +0800408 struct fsl_spi_reg *reg_base = mspi->reg_base;
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400409
410 mspi->count = len;
411
412 /* enable rx ints */
Mingkai Hub36ece82010-10-12 18:18:31 +0800413 mpc8xxx_spi_write_reg(&reg_base->mask, SPIM_NE);
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400414
415 /* transmit word */
416 word = mspi->get_tx(mspi);
Mingkai Hub36ece82010-10-12 18:18:31 +0800417 mpc8xxx_spi_write_reg(&reg_base->transmit, word);
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400418
419 return 0;
420}
421
Mingkai Hub36ece82010-10-12 18:18:31 +0800422static int fsl_spi_bufs(struct spi_device *spi, struct spi_transfer *t,
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400423 bool is_dma_mapped)
424{
425 struct mpc8xxx_spi *mpc8xxx_spi = spi_master_get_devdata(spi->master);
Mingkai Hub36ece82010-10-12 18:18:31 +0800426 struct fsl_spi_reg *reg_base;
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400427 unsigned int len = t->len;
428 u8 bits_per_word;
429 int ret;
430
Mingkai Hub36ece82010-10-12 18:18:31 +0800431 reg_base = mpc8xxx_spi->reg_base;
Joakim Tjernlundc9bfcb32008-05-12 14:02:30 -0700432 bits_per_word = spi->bits_per_word;
433 if (t->bits_per_word)
434 bits_per_word = t->bits_per_word;
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400435
Peter Korsgaardaa77d962008-09-13 02:33:15 -0700436 if (bits_per_word > 8) {
437 /* invalid length? */
438 if (len & 1)
439 return -EINVAL;
Joakim Tjernlundc9bfcb32008-05-12 14:02:30 -0700440 len /= 2;
Peter Korsgaardaa77d962008-09-13 02:33:15 -0700441 }
442 if (bits_per_word > 16) {
443 /* invalid length? */
444 if (len & 1)
445 return -EINVAL;
Joakim Tjernlundc9bfcb32008-05-12 14:02:30 -0700446 len /= 2;
Peter Korsgaardaa77d962008-09-13 02:33:15 -0700447 }
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400448
449 mpc8xxx_spi->tx = t->tx_buf;
450 mpc8xxx_spi->rx = t->rx_buf;
Peter Korsgaardaa77d962008-09-13 02:33:15 -0700451
Anton Vorontsov575c5802009-06-18 16:49:08 -0700452 INIT_COMPLETION(mpc8xxx_spi->done);
Kumar Galaccf06992006-05-20 15:00:15 -0700453
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400454 if (mpc8xxx_spi->flags & SPI_CPM_MODE)
Mingkai Hub36ece82010-10-12 18:18:31 +0800455 ret = fsl_spi_cpm_bufs(mpc8xxx_spi, t, is_dma_mapped);
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400456 else
Mingkai Hub36ece82010-10-12 18:18:31 +0800457 ret = fsl_spi_cpu_bufs(mpc8xxx_spi, t, len);
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400458 if (ret)
459 return ret;
Kumar Galaccf06992006-05-20 15:00:15 -0700460
Anton Vorontsov575c5802009-06-18 16:49:08 -0700461 wait_for_completion(&mpc8xxx_spi->done);
Kumar Galaccf06992006-05-20 15:00:15 -0700462
463 /* disable rx ints */
Mingkai Hub36ece82010-10-12 18:18:31 +0800464 mpc8xxx_spi_write_reg(&reg_base->mask, 0);
Kumar Galaccf06992006-05-20 15:00:15 -0700465
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400466 if (mpc8xxx_spi->flags & SPI_CPM_MODE)
Mingkai Hub36ece82010-10-12 18:18:31 +0800467 fsl_spi_cpm_bufs_complete(mpc8xxx_spi);
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400468
Anton Vorontsov575c5802009-06-18 16:49:08 -0700469 return mpc8xxx_spi->count;
Joakim Tjernlundc9bfcb32008-05-12 14:02:30 -0700470}
471
Mingkai Hub36ece82010-10-12 18:18:31 +0800472static void fsl_spi_do_one_msg(struct spi_message *m)
Anton Vorontsovb9b9af12009-06-18 16:49:06 -0700473{
474 struct spi_device *spi = m->spi;
475 struct spi_transfer *t;
476 unsigned int cs_change;
477 const int nsecs = 50;
478 int status;
479
480 cs_change = 1;
481 status = 0;
482 list_for_each_entry(t, &m->transfers, transfer_list) {
483 if (t->bits_per_word || t->speed_hz) {
484 /* Don't allow changes if CS is active */
485 status = -EINVAL;
486
487 if (cs_change)
Mingkai Hub36ece82010-10-12 18:18:31 +0800488 status = fsl_spi_setup_transfer(spi, t);
Anton Vorontsovb9b9af12009-06-18 16:49:06 -0700489 if (status < 0)
490 break;
491 }
492
493 if (cs_change) {
Mingkai Hub36ece82010-10-12 18:18:31 +0800494 fsl_spi_chipselect(spi, BITBANG_CS_ACTIVE);
Anton Vorontsovb9b9af12009-06-18 16:49:06 -0700495 ndelay(nsecs);
496 }
497 cs_change = t->cs_change;
498 if (t->len)
Mingkai Hub36ece82010-10-12 18:18:31 +0800499 status = fsl_spi_bufs(spi, t, m->is_dma_mapped);
Anton Vorontsovb9b9af12009-06-18 16:49:06 -0700500 if (status) {
501 status = -EMSGSIZE;
502 break;
503 }
504 m->actual_length += t->len;
505
506 if (t->delay_usecs)
507 udelay(t->delay_usecs);
508
509 if (cs_change) {
510 ndelay(nsecs);
Mingkai Hub36ece82010-10-12 18:18:31 +0800511 fsl_spi_chipselect(spi, BITBANG_CS_INACTIVE);
Anton Vorontsovb9b9af12009-06-18 16:49:06 -0700512 ndelay(nsecs);
513 }
514 }
515
516 m->status = status;
517 m->complete(m->context);
518
519 if (status || !cs_change) {
520 ndelay(nsecs);
Mingkai Hub36ece82010-10-12 18:18:31 +0800521 fsl_spi_chipselect(spi, BITBANG_CS_INACTIVE);
Anton Vorontsovb9b9af12009-06-18 16:49:06 -0700522 }
523
Mingkai Hub36ece82010-10-12 18:18:31 +0800524 fsl_spi_setup_transfer(spi, NULL);
Anton Vorontsovb9b9af12009-06-18 16:49:06 -0700525}
526
Mingkai Hub36ece82010-10-12 18:18:31 +0800527static int fsl_spi_setup(struct spi_device *spi)
Joakim Tjernlundc9bfcb32008-05-12 14:02:30 -0700528{
Anton Vorontsov575c5802009-06-18 16:49:08 -0700529 struct mpc8xxx_spi *mpc8xxx_spi;
Mingkai Hub36ece82010-10-12 18:18:31 +0800530 struct fsl_spi_reg *reg_base;
Joakim Tjernlundc9bfcb32008-05-12 14:02:30 -0700531 int retval;
532 u32 hw_mode;
Anton Vorontsov575c5802009-06-18 16:49:08 -0700533 struct spi_mpc8xxx_cs *cs = spi->controller_state;
Joakim Tjernlundc9bfcb32008-05-12 14:02:30 -0700534
Joakim Tjernlundc9bfcb32008-05-12 14:02:30 -0700535 if (!spi->max_speed_hz)
536 return -EINVAL;
537
538 if (!cs) {
539 cs = kzalloc(sizeof *cs, GFP_KERNEL);
540 if (!cs)
541 return -ENOMEM;
542 spi->controller_state = cs;
543 }
Anton Vorontsov575c5802009-06-18 16:49:08 -0700544 mpc8xxx_spi = spi_master_get_devdata(spi->master);
Joakim Tjernlundc9bfcb32008-05-12 14:02:30 -0700545
Mingkai Hub36ece82010-10-12 18:18:31 +0800546 reg_base = mpc8xxx_spi->reg_base;
547
Thomas Weber88393162010-03-16 11:47:56 +0100548 hw_mode = cs->hw_mode; /* Save original settings */
Mingkai Hub36ece82010-10-12 18:18:31 +0800549 cs->hw_mode = mpc8xxx_spi_read_reg(&reg_base->mode);
Joakim Tjernlundc9bfcb32008-05-12 14:02:30 -0700550 /* mask out bits we are going to set */
551 cs->hw_mode &= ~(SPMODE_CP_BEGIN_EDGECLK | SPMODE_CI_INACTIVEHIGH
552 | SPMODE_REV | SPMODE_LOOP);
553
554 if (spi->mode & SPI_CPHA)
555 cs->hw_mode |= SPMODE_CP_BEGIN_EDGECLK;
556 if (spi->mode & SPI_CPOL)
557 cs->hw_mode |= SPMODE_CI_INACTIVEHIGH;
558 if (!(spi->mode & SPI_LSB_FIRST))
559 cs->hw_mode |= SPMODE_REV;
560 if (spi->mode & SPI_LOOP)
561 cs->hw_mode |= SPMODE_LOOP;
562
Mingkai Hub36ece82010-10-12 18:18:31 +0800563 retval = fsl_spi_setup_transfer(spi, NULL);
Joakim Tjernlundc9bfcb32008-05-12 14:02:30 -0700564 if (retval < 0) {
565 cs->hw_mode = hw_mode; /* Restore settings */
566 return retval;
567 }
Joakim Tjernlundc9bfcb32008-05-12 14:02:30 -0700568 return 0;
Kumar Galaccf06992006-05-20 15:00:15 -0700569}
570
Mingkai Hub36ece82010-10-12 18:18:31 +0800571static void fsl_spi_cpm_irq(struct mpc8xxx_spi *mspi, u32 events)
Kumar Galaccf06992006-05-20 15:00:15 -0700572{
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400573 u16 len;
Mingkai Hub36ece82010-10-12 18:18:31 +0800574 struct fsl_spi_reg *reg_base = mspi->reg_base;
Kumar Galaccf06992006-05-20 15:00:15 -0700575
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400576 dev_dbg(mspi->dev, "%s: bd datlen %d, count %d\n", __func__,
577 in_be16(&mspi->rx_bd->cbd_datlen), mspi->count);
Kumar Galaccf06992006-05-20 15:00:15 -0700578
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400579 len = in_be16(&mspi->rx_bd->cbd_datlen);
580 if (len > mspi->count) {
581 WARN_ON(1);
582 len = mspi->count;
Kumar Galaccf06992006-05-20 15:00:15 -0700583 }
584
585 /* Clear the events */
Mingkai Hub36ece82010-10-12 18:18:31 +0800586 mpc8xxx_spi_write_reg(&reg_base->event, events);
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400587
588 mspi->count -= len;
589 if (mspi->count)
Mingkai Hub36ece82010-10-12 18:18:31 +0800590 fsl_spi_cpm_bufs_start(mspi);
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400591 else
592 complete(&mspi->done);
593}
594
Mingkai Hub36ece82010-10-12 18:18:31 +0800595static void fsl_spi_cpu_irq(struct mpc8xxx_spi *mspi, u32 events)
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400596{
Mingkai Hub36ece82010-10-12 18:18:31 +0800597 struct fsl_spi_reg *reg_base = mspi->reg_base;
598
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400599 /* We need handle RX first */
600 if (events & SPIE_NE) {
Mingkai Hub36ece82010-10-12 18:18:31 +0800601 u32 rx_data = mpc8xxx_spi_read_reg(&reg_base->receive);
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400602
603 if (mspi->rx)
604 mspi->get_rx(rx_data, mspi);
605 }
606
607 if ((events & SPIE_NF) == 0)
608 /* spin until TX is done */
609 while (((events =
Mingkai Hub36ece82010-10-12 18:18:31 +0800610 mpc8xxx_spi_read_reg(&reg_base->event)) &
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400611 SPIE_NF) == 0)
612 cpu_relax();
613
614 /* Clear the events */
Mingkai Hub36ece82010-10-12 18:18:31 +0800615 mpc8xxx_spi_write_reg(&reg_base->event, events);
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400616
617 mspi->count -= 1;
618 if (mspi->count) {
619 u32 word = mspi->get_tx(mspi);
620
Mingkai Hub36ece82010-10-12 18:18:31 +0800621 mpc8xxx_spi_write_reg(&reg_base->transmit, word);
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400622 } else {
623 complete(&mspi->done);
624 }
625}
626
Mingkai Hub36ece82010-10-12 18:18:31 +0800627static irqreturn_t fsl_spi_irq(s32 irq, void *context_data)
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400628{
629 struct mpc8xxx_spi *mspi = context_data;
630 irqreturn_t ret = IRQ_NONE;
631 u32 events;
Mingkai Hub36ece82010-10-12 18:18:31 +0800632 struct fsl_spi_reg *reg_base = mspi->reg_base;
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400633
634 /* Get interrupt events(tx/rx) */
Mingkai Hub36ece82010-10-12 18:18:31 +0800635 events = mpc8xxx_spi_read_reg(&reg_base->event);
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400636 if (events)
637 ret = IRQ_HANDLED;
638
639 dev_dbg(mspi->dev, "%s: events %x\n", __func__, events);
640
641 if (mspi->flags & SPI_CPM_MODE)
Mingkai Hub36ece82010-10-12 18:18:31 +0800642 fsl_spi_cpm_irq(mspi, events);
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400643 else
Mingkai Hub36ece82010-10-12 18:18:31 +0800644 fsl_spi_cpu_irq(mspi, events);
Kumar Galaccf06992006-05-20 15:00:15 -0700645
646 return ret;
647}
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400648
Mingkai Hub36ece82010-10-12 18:18:31 +0800649static void *fsl_spi_alloc_dummy_rx(void)
Joakim Tjernlundc9bfcb32008-05-12 14:02:30 -0700650{
Mingkai Hub36ece82010-10-12 18:18:31 +0800651 mutex_lock(&fsl_dummy_rx_lock);
Joakim Tjernlundc9bfcb32008-05-12 14:02:30 -0700652
Mingkai Hub36ece82010-10-12 18:18:31 +0800653 if (!fsl_dummy_rx)
654 fsl_dummy_rx = kmalloc(SPI_MRBLR, GFP_KERNEL);
655 if (fsl_dummy_rx)
656 fsl_dummy_rx_refcnt++;
Joakim Tjernlundc9bfcb32008-05-12 14:02:30 -0700657
Mingkai Hub36ece82010-10-12 18:18:31 +0800658 mutex_unlock(&fsl_dummy_rx_lock);
Joakim Tjernlundc9bfcb32008-05-12 14:02:30 -0700659
Mingkai Hub36ece82010-10-12 18:18:31 +0800660 return fsl_dummy_rx;
Joakim Tjernlundc9bfcb32008-05-12 14:02:30 -0700661}
662
Mingkai Hub36ece82010-10-12 18:18:31 +0800663static void fsl_spi_free_dummy_rx(void)
Joakim Tjernlundc9bfcb32008-05-12 14:02:30 -0700664{
Mingkai Hub36ece82010-10-12 18:18:31 +0800665 mutex_lock(&fsl_dummy_rx_lock);
Kumar Galaccf06992006-05-20 15:00:15 -0700666
Mingkai Hub36ece82010-10-12 18:18:31 +0800667 switch (fsl_dummy_rx_refcnt) {
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400668 case 0:
669 WARN_ON(1);
670 break;
671 case 1:
Mingkai Hub36ece82010-10-12 18:18:31 +0800672 kfree(fsl_dummy_rx);
673 fsl_dummy_rx = NULL;
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400674 /* fall through */
675 default:
Mingkai Hub36ece82010-10-12 18:18:31 +0800676 fsl_dummy_rx_refcnt--;
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400677 break;
678 }
679
Mingkai Hub36ece82010-10-12 18:18:31 +0800680 mutex_unlock(&fsl_dummy_rx_lock);
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400681}
682
Mingkai Hub36ece82010-10-12 18:18:31 +0800683static unsigned long fsl_spi_cpm_get_pram(struct mpc8xxx_spi *mspi)
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400684{
685 struct device *dev = mspi->dev;
Grant Likely61c7a082010-04-13 16:12:29 -0700686 struct device_node *np = dev->of_node;
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400687 const u32 *iprop;
688 int size;
Holger Brunckfb644092011-06-20 18:31:57 +0200689 void __iomem *spi_base;
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400690 unsigned long pram_ofs = -ENOMEM;
691
692 /* Can't use of_address_to_resource(), QE muram isn't at 0. */
693 iprop = of_get_property(np, "reg", &size);
694
695 /* QE with a fixed pram location? */
696 if (mspi->flags & SPI_QE && iprop && size == sizeof(*iprop) * 4)
697 return cpm_muram_alloc_fixed(iprop[2], SPI_PRAM_SIZE);
698
699 /* QE but with a dynamic pram location? */
700 if (mspi->flags & SPI_QE) {
701 pram_ofs = cpm_muram_alloc(SPI_PRAM_SIZE, 64);
702 qe_issue_cmd(QE_ASSIGN_PAGE_TO_DEVICE, mspi->subblock,
703 QE_CR_PROTOCOL_UNSPECIFIED, pram_ofs);
704 return pram_ofs;
705 }
706
Holger Brunckfb644092011-06-20 18:31:57 +0200707 spi_base = of_iomap(np, 1);
708 if (spi_base == NULL)
709 return -EINVAL;
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400710
711 if (mspi->flags & SPI_CPM2) {
712 pram_ofs = cpm_muram_alloc(SPI_PRAM_SIZE, 64);
Holger Brunckfb644092011-06-20 18:31:57 +0200713 out_be16(spi_base, pram_ofs);
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400714 } else {
Holger Brunckfb644092011-06-20 18:31:57 +0200715 struct spi_pram __iomem *pram = spi_base;
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400716 u16 rpbase = in_be16(&pram->rpbase);
717
718 /* Microcode relocation patch applied? */
719 if (rpbase)
720 pram_ofs = rpbase;
Holger Brunckfb644092011-06-20 18:31:57 +0200721 else {
722 pram_ofs = cpm_muram_alloc(SPI_PRAM_SIZE, 64);
723 out_be16(spi_base, pram_ofs);
724 }
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400725 }
726
Holger Brunckfb644092011-06-20 18:31:57 +0200727 iounmap(spi_base);
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400728 return pram_ofs;
729}
730
Mingkai Hub36ece82010-10-12 18:18:31 +0800731static int fsl_spi_cpm_init(struct mpc8xxx_spi *mspi)
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400732{
733 struct device *dev = mspi->dev;
Grant Likely61c7a082010-04-13 16:12:29 -0700734 struct device_node *np = dev->of_node;
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400735 const u32 *iprop;
736 int size;
737 unsigned long pram_ofs;
738 unsigned long bds_ofs;
739
740 if (!(mspi->flags & SPI_CPM_MODE))
741 return 0;
742
Mingkai Hub36ece82010-10-12 18:18:31 +0800743 if (!fsl_spi_alloc_dummy_rx())
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400744 return -ENOMEM;
745
746 if (mspi->flags & SPI_QE) {
747 iprop = of_get_property(np, "cell-index", &size);
748 if (iprop && size == sizeof(*iprop))
749 mspi->subblock = *iprop;
750
751 switch (mspi->subblock) {
752 default:
753 dev_warn(dev, "cell-index unspecified, assuming SPI1");
754 /* fall through */
755 case 0:
756 mspi->subblock = QE_CR_SUBBLOCK_SPI1;
757 break;
758 case 1:
759 mspi->subblock = QE_CR_SUBBLOCK_SPI2;
760 break;
761 }
762 }
763
Mingkai Hub36ece82010-10-12 18:18:31 +0800764 pram_ofs = fsl_spi_cpm_get_pram(mspi);
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400765 if (IS_ERR_VALUE(pram_ofs)) {
766 dev_err(dev, "can't allocate spi parameter ram\n");
767 goto err_pram;
768 }
769
770 bds_ofs = cpm_muram_alloc(sizeof(*mspi->tx_bd) +
771 sizeof(*mspi->rx_bd), 8);
772 if (IS_ERR_VALUE(bds_ofs)) {
773 dev_err(dev, "can't allocate bds\n");
774 goto err_bds;
775 }
776
777 mspi->dma_dummy_tx = dma_map_single(dev, empty_zero_page, PAGE_SIZE,
778 DMA_TO_DEVICE);
779 if (dma_mapping_error(dev, mspi->dma_dummy_tx)) {
780 dev_err(dev, "unable to map dummy tx buffer\n");
781 goto err_dummy_tx;
782 }
783
Mingkai Hub36ece82010-10-12 18:18:31 +0800784 mspi->dma_dummy_rx = dma_map_single(dev, fsl_dummy_rx, SPI_MRBLR,
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400785 DMA_FROM_DEVICE);
786 if (dma_mapping_error(dev, mspi->dma_dummy_rx)) {
787 dev_err(dev, "unable to map dummy rx buffer\n");
788 goto err_dummy_rx;
789 }
790
791 mspi->pram = cpm_muram_addr(pram_ofs);
792
793 mspi->tx_bd = cpm_muram_addr(bds_ofs);
794 mspi->rx_bd = cpm_muram_addr(bds_ofs + sizeof(*mspi->tx_bd));
795
796 /* Initialize parameter ram. */
797 out_be16(&mspi->pram->tbase, cpm_muram_offset(mspi->tx_bd));
798 out_be16(&mspi->pram->rbase, cpm_muram_offset(mspi->rx_bd));
799 out_8(&mspi->pram->tfcr, CPMFCR_EB | CPMFCR_GBL);
800 out_8(&mspi->pram->rfcr, CPMFCR_EB | CPMFCR_GBL);
801 out_be16(&mspi->pram->mrblr, SPI_MRBLR);
802 out_be32(&mspi->pram->rstate, 0);
803 out_be32(&mspi->pram->rdp, 0);
804 out_be16(&mspi->pram->rbptr, 0);
805 out_be16(&mspi->pram->rbc, 0);
806 out_be32(&mspi->pram->rxtmp, 0);
807 out_be32(&mspi->pram->tstate, 0);
808 out_be32(&mspi->pram->tdp, 0);
809 out_be16(&mspi->pram->tbptr, 0);
810 out_be16(&mspi->pram->tbc, 0);
811 out_be32(&mspi->pram->txtmp, 0);
812
813 return 0;
814
815err_dummy_rx:
816 dma_unmap_single(dev, mspi->dma_dummy_tx, PAGE_SIZE, DMA_TO_DEVICE);
817err_dummy_tx:
818 cpm_muram_free(bds_ofs);
819err_bds:
820 cpm_muram_free(pram_ofs);
821err_pram:
Mingkai Hub36ece82010-10-12 18:18:31 +0800822 fsl_spi_free_dummy_rx();
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400823 return -ENOMEM;
824}
825
Mingkai Hub36ece82010-10-12 18:18:31 +0800826static void fsl_spi_cpm_free(struct mpc8xxx_spi *mspi)
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400827{
828 struct device *dev = mspi->dev;
829
Jeff Harris387719c2011-09-23 11:49:36 -0400830 if (!(mspi->flags & SPI_CPM_MODE))
831 return;
832
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400833 dma_unmap_single(dev, mspi->dma_dummy_rx, SPI_MRBLR, DMA_FROM_DEVICE);
834 dma_unmap_single(dev, mspi->dma_dummy_tx, PAGE_SIZE, DMA_TO_DEVICE);
835 cpm_muram_free(cpm_muram_offset(mspi->tx_bd));
836 cpm_muram_free(cpm_muram_offset(mspi->pram));
Mingkai Hub36ece82010-10-12 18:18:31 +0800837 fsl_spi_free_dummy_rx();
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400838}
839
Mingkai Hub36ece82010-10-12 18:18:31 +0800840static void fsl_spi_remove(struct mpc8xxx_spi *mspi)
Anton Vorontsov87ec0e92009-10-12 20:49:25 +0400841{
Mingkai Hub36ece82010-10-12 18:18:31 +0800842 iounmap(mspi->reg_base);
843 fsl_spi_cpm_free(mspi);
Anton Vorontsov87ec0e92009-10-12 20:49:25 +0400844}
845
Mingkai Hub36ece82010-10-12 18:18:31 +0800846static struct spi_master * __devinit fsl_spi_probe(struct device *dev,
847 struct resource *mem, unsigned int irq)
Kumar Galaccf06992006-05-20 15:00:15 -0700848{
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -0700849 struct fsl_spi_platform_data *pdata = dev->platform_data;
Kumar Galaccf06992006-05-20 15:00:15 -0700850 struct spi_master *master;
Anton Vorontsov575c5802009-06-18 16:49:08 -0700851 struct mpc8xxx_spi *mpc8xxx_spi;
Mingkai Hub36ece82010-10-12 18:18:31 +0800852 struct fsl_spi_reg *reg_base;
Kumar Galaccf06992006-05-20 15:00:15 -0700853 u32 regval;
854 int ret = 0;
855
Anton Vorontsov575c5802009-06-18 16:49:08 -0700856 master = spi_alloc_master(dev, sizeof(struct mpc8xxx_spi));
Kumar Galaccf06992006-05-20 15:00:15 -0700857 if (master == NULL) {
858 ret = -ENOMEM;
859 goto err;
860 }
861
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -0700862 dev_set_drvdata(dev, master);
Kumar Galaccf06992006-05-20 15:00:15 -0700863
Mingkai Hub36ece82010-10-12 18:18:31 +0800864 ret = mpc8xxx_spi_probe(dev, mem, irq);
865 if (ret)
866 goto err_probe;
David Brownelle7db06b2009-06-17 16:26:04 -0700867
Mingkai Hub36ece82010-10-12 18:18:31 +0800868 master->setup = fsl_spi_setup;
Joakim Tjernlundc9bfcb32008-05-12 14:02:30 -0700869
Anton Vorontsov575c5802009-06-18 16:49:08 -0700870 mpc8xxx_spi = spi_master_get_devdata(master);
Mingkai Hub36ece82010-10-12 18:18:31 +0800871 mpc8xxx_spi->spi_do_one_msg = fsl_spi_do_one_msg;
872 mpc8xxx_spi->spi_remove = fsl_spi_remove;
Anton Vorontsove24a4d12007-08-10 13:01:01 -0700873
Mingkai Hub36ece82010-10-12 18:18:31 +0800874
875 ret = fsl_spi_cpm_init(mpc8xxx_spi);
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400876 if (ret)
877 goto err_cpm_init;
878
Anton Vorontsov87ec0e92009-10-12 20:49:25 +0400879 if (mpc8xxx_spi->flags & SPI_QE_CPU_MODE) {
Anton Vorontsov575c5802009-06-18 16:49:08 -0700880 mpc8xxx_spi->rx_shift = 16;
881 mpc8xxx_spi->tx_shift = 24;
Joakim Tjernlundf29ba282007-07-17 04:04:12 -0700882 }
883
Mingkai Hub36ece82010-10-12 18:18:31 +0800884 mpc8xxx_spi->reg_base = ioremap(mem->start, resource_size(mem));
885 if (mpc8xxx_spi->reg_base == NULL) {
Kumar Galaccf06992006-05-20 15:00:15 -0700886 ret = -ENOMEM;
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400887 goto err_ioremap;
Kumar Galaccf06992006-05-20 15:00:15 -0700888 }
889
Kumar Galaccf06992006-05-20 15:00:15 -0700890 /* Register for SPI Interrupt */
Mingkai Hub36ece82010-10-12 18:18:31 +0800891 ret = request_irq(mpc8xxx_spi->irq, fsl_spi_irq,
892 0, "fsl_spi", mpc8xxx_spi);
Kumar Galaccf06992006-05-20 15:00:15 -0700893
894 if (ret != 0)
Mingkai Hub36ece82010-10-12 18:18:31 +0800895 goto free_irq;
Kumar Galaccf06992006-05-20 15:00:15 -0700896
Mingkai Hub36ece82010-10-12 18:18:31 +0800897 reg_base = mpc8xxx_spi->reg_base;
Kumar Galaccf06992006-05-20 15:00:15 -0700898
899 /* SPI controller initializations */
Mingkai Hub36ece82010-10-12 18:18:31 +0800900 mpc8xxx_spi_write_reg(&reg_base->mode, 0);
901 mpc8xxx_spi_write_reg(&reg_base->mask, 0);
902 mpc8xxx_spi_write_reg(&reg_base->command, 0);
903 mpc8xxx_spi_write_reg(&reg_base->event, 0xffffffff);
Kumar Galaccf06992006-05-20 15:00:15 -0700904
905 /* Enable SPI interface */
906 regval = pdata->initial_spmode | SPMODE_INIT_VAL | SPMODE_ENABLE;
Anton Vorontsov87ec0e92009-10-12 20:49:25 +0400907 if (mpc8xxx_spi->flags & SPI_QE_CPU_MODE)
Joakim Tjernlundf29ba282007-07-17 04:04:12 -0700908 regval |= SPMODE_OP;
909
Mingkai Hub36ece82010-10-12 18:18:31 +0800910 mpc8xxx_spi_write_reg(&reg_base->mode, regval);
Joakim Tjernlundc9bfcb32008-05-12 14:02:30 -0700911
912 ret = spi_register_master(master);
913 if (ret < 0)
914 goto unreg_master;
Kumar Galaccf06992006-05-20 15:00:15 -0700915
Mingkai Hub36ece82010-10-12 18:18:31 +0800916 dev_info(dev, "at 0x%p (irq = %d), %s mode\n", reg_base,
Anton Vorontsov87ec0e92009-10-12 20:49:25 +0400917 mpc8xxx_spi->irq, mpc8xxx_spi_strmode(mpc8xxx_spi->flags));
Kumar Galaccf06992006-05-20 15:00:15 -0700918
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -0700919 return master;
Kumar Galaccf06992006-05-20 15:00:15 -0700920
Joakim Tjernlundc9bfcb32008-05-12 14:02:30 -0700921unreg_master:
Anton Vorontsov575c5802009-06-18 16:49:08 -0700922 free_irq(mpc8xxx_spi->irq, mpc8xxx_spi);
Mingkai Hub36ece82010-10-12 18:18:31 +0800923free_irq:
924 iounmap(mpc8xxx_spi->reg_base);
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400925err_ioremap:
Mingkai Hub36ece82010-10-12 18:18:31 +0800926 fsl_spi_cpm_free(mpc8xxx_spi);
Anton Vorontsov4c1fba42009-10-12 20:49:27 +0400927err_cpm_init:
Mingkai Hub36ece82010-10-12 18:18:31 +0800928err_probe:
Kumar Galaccf06992006-05-20 15:00:15 -0700929 spi_master_put(master);
Kumar Galaccf06992006-05-20 15:00:15 -0700930err:
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -0700931 return ERR_PTR(ret);
Kumar Galaccf06992006-05-20 15:00:15 -0700932}
933
Mingkai Hub36ece82010-10-12 18:18:31 +0800934static void fsl_spi_cs_control(struct spi_device *spi, bool on)
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -0700935{
936 struct device *dev = spi->dev.parent;
Anton Vorontsov575c5802009-06-18 16:49:08 -0700937 struct mpc8xxx_spi_probe_info *pinfo = to_of_pinfo(dev->platform_data);
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -0700938 u16 cs = spi->chip_select;
939 int gpio = pinfo->gpios[cs];
940 bool alow = pinfo->alow_flags[cs];
941
942 gpio_set_value(gpio, on ^ alow);
943}
944
Mingkai Hub36ece82010-10-12 18:18:31 +0800945static int of_fsl_spi_get_chipselects(struct device *dev)
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -0700946{
Grant Likely61c7a082010-04-13 16:12:29 -0700947 struct device_node *np = dev->of_node;
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -0700948 struct fsl_spi_platform_data *pdata = dev->platform_data;
Anton Vorontsov575c5802009-06-18 16:49:08 -0700949 struct mpc8xxx_spi_probe_info *pinfo = to_of_pinfo(pdata);
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -0700950 unsigned int ngpios;
951 int i = 0;
952 int ret;
953
954 ngpios = of_gpio_count(np);
955 if (!ngpios) {
956 /*
957 * SPI w/o chip-select line. One SPI device is still permitted
958 * though.
959 */
960 pdata->max_chipselect = 1;
961 return 0;
962 }
963
Roel Kluin02141542009-06-16 15:31:15 -0700964 pinfo->gpios = kmalloc(ngpios * sizeof(*pinfo->gpios), GFP_KERNEL);
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -0700965 if (!pinfo->gpios)
966 return -ENOMEM;
Roel Kluin02141542009-06-16 15:31:15 -0700967 memset(pinfo->gpios, -1, ngpios * sizeof(*pinfo->gpios));
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -0700968
Roel Kluin02141542009-06-16 15:31:15 -0700969 pinfo->alow_flags = kzalloc(ngpios * sizeof(*pinfo->alow_flags),
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -0700970 GFP_KERNEL);
971 if (!pinfo->alow_flags) {
972 ret = -ENOMEM;
973 goto err_alloc_flags;
974 }
975
976 for (; i < ngpios; i++) {
977 int gpio;
978 enum of_gpio_flags flags;
979
980 gpio = of_get_gpio_flags(np, i, &flags);
981 if (!gpio_is_valid(gpio)) {
982 dev_err(dev, "invalid gpio #%d: %d\n", i, gpio);
Anton Vorontsov783058f2009-10-12 20:49:22 +0400983 ret = gpio;
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -0700984 goto err_loop;
985 }
986
987 ret = gpio_request(gpio, dev_name(dev));
988 if (ret) {
989 dev_err(dev, "can't request gpio #%d: %d\n", i, ret);
990 goto err_loop;
991 }
992
993 pinfo->gpios[i] = gpio;
994 pinfo->alow_flags[i] = flags & OF_GPIO_ACTIVE_LOW;
995
996 ret = gpio_direction_output(pinfo->gpios[i],
997 pinfo->alow_flags[i]);
998 if (ret) {
999 dev_err(dev, "can't set output direction for gpio "
1000 "#%d: %d\n", i, ret);
1001 goto err_loop;
1002 }
1003 }
1004
1005 pdata->max_chipselect = ngpios;
Mingkai Hub36ece82010-10-12 18:18:31 +08001006 pdata->cs_control = fsl_spi_cs_control;
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001007
1008 return 0;
1009
1010err_loop:
1011 while (i >= 0) {
1012 if (gpio_is_valid(pinfo->gpios[i]))
1013 gpio_free(pinfo->gpios[i]);
1014 i--;
1015 }
1016
1017 kfree(pinfo->alow_flags);
1018 pinfo->alow_flags = NULL;
1019err_alloc_flags:
1020 kfree(pinfo->gpios);
1021 pinfo->gpios = NULL;
1022 return ret;
1023}
1024
Mingkai Hub36ece82010-10-12 18:18:31 +08001025static int of_fsl_spi_free_chipselects(struct device *dev)
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001026{
1027 struct fsl_spi_platform_data *pdata = dev->platform_data;
Anton Vorontsov575c5802009-06-18 16:49:08 -07001028 struct mpc8xxx_spi_probe_info *pinfo = to_of_pinfo(pdata);
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001029 int i;
1030
1031 if (!pinfo->gpios)
1032 return 0;
1033
1034 for (i = 0; i < pdata->max_chipselect; i++) {
1035 if (gpio_is_valid(pinfo->gpios[i]))
1036 gpio_free(pinfo->gpios[i]);
1037 }
1038
1039 kfree(pinfo->gpios);
1040 kfree(pinfo->alow_flags);
1041 return 0;
1042}
1043
Grant Likely18d306d2011-02-22 21:02:43 -07001044static int __devinit of_fsl_spi_probe(struct platform_device *ofdev)
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001045{
1046 struct device *dev = &ofdev->dev;
Grant Likely61c7a082010-04-13 16:12:29 -07001047 struct device_node *np = ofdev->dev.of_node;
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001048 struct spi_master *master;
1049 struct resource mem;
1050 struct resource irq;
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001051 int ret = -ENOMEM;
1052
Grant Likely18d306d2011-02-22 21:02:43 -07001053 ret = of_mpc8xxx_spi_probe(ofdev);
Mingkai Hub36ece82010-10-12 18:18:31 +08001054 if (ret)
1055 return ret;
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001056
Mingkai Hub36ece82010-10-12 18:18:31 +08001057 ret = of_fsl_spi_get_chipselects(dev);
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001058 if (ret)
1059 goto err;
1060
1061 ret = of_address_to_resource(np, 0, &mem);
1062 if (ret)
1063 goto err;
1064
1065 ret = of_irq_to_resource(np, 0, &irq);
1066 if (!ret) {
1067 ret = -EINVAL;
1068 goto err;
1069 }
1070
Mingkai Hub36ece82010-10-12 18:18:31 +08001071 master = fsl_spi_probe(dev, &mem, irq.start);
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001072 if (IS_ERR(master)) {
1073 ret = PTR_ERR(master);
1074 goto err;
1075 }
1076
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001077 return 0;
1078
1079err:
Mingkai Hub36ece82010-10-12 18:18:31 +08001080 of_fsl_spi_free_chipselects(dev);
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001081 return ret;
1082}
1083
Mingkai Hub36ece82010-10-12 18:18:31 +08001084static int __devexit of_fsl_spi_remove(struct platform_device *ofdev)
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001085{
1086 int ret;
1087
Anton Vorontsov575c5802009-06-18 16:49:08 -07001088 ret = mpc8xxx_spi_remove(&ofdev->dev);
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001089 if (ret)
1090 return ret;
Mingkai Hub36ece82010-10-12 18:18:31 +08001091 of_fsl_spi_free_chipselects(&ofdev->dev);
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001092 return 0;
1093}
1094
Mingkai Hub36ece82010-10-12 18:18:31 +08001095static const struct of_device_id of_fsl_spi_match[] = {
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001096 { .compatible = "fsl,spi" },
Mingkai Hub36ece82010-10-12 18:18:31 +08001097 {}
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001098};
Mingkai Hub36ece82010-10-12 18:18:31 +08001099MODULE_DEVICE_TABLE(of, of_fsl_spi_match);
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001100
Grant Likely18d306d2011-02-22 21:02:43 -07001101static struct platform_driver of_fsl_spi_driver = {
Grant Likely40182942010-04-13 16:13:02 -07001102 .driver = {
Mingkai Hub36ece82010-10-12 18:18:31 +08001103 .name = "fsl_spi",
Grant Likely40182942010-04-13 16:13:02 -07001104 .owner = THIS_MODULE,
Mingkai Hub36ece82010-10-12 18:18:31 +08001105 .of_match_table = of_fsl_spi_match,
Grant Likely40182942010-04-13 16:13:02 -07001106 },
Mingkai Hub36ece82010-10-12 18:18:31 +08001107 .probe = of_fsl_spi_probe,
1108 .remove = __devexit_p(of_fsl_spi_remove),
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001109};
1110
1111#ifdef CONFIG_MPC832x_RDB
1112/*
Mingkai Hub36ece82010-10-12 18:18:31 +08001113 * XXX XXX XXX
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001114 * This is "legacy" platform driver, was used by the MPC8323E-RDB boards
1115 * only. The driver should go away soon, since newer MPC8323E-RDB's device
1116 * tree can work with OpenFirmware driver. But for now we support old trees
1117 * as well.
1118 */
Anton Vorontsov575c5802009-06-18 16:49:08 -07001119static int __devinit plat_mpc8xxx_spi_probe(struct platform_device *pdev)
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001120{
1121 struct resource *mem;
Uwe Kleine-Könige9a172f2010-01-20 13:49:44 -07001122 int irq;
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001123 struct spi_master *master;
1124
1125 if (!pdev->dev.platform_data)
1126 return -EINVAL;
1127
1128 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1129 if (!mem)
1130 return -EINVAL;
1131
1132 irq = platform_get_irq(pdev, 0);
Uwe Kleine-Könige9a172f2010-01-20 13:49:44 -07001133 if (irq <= 0)
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001134 return -EINVAL;
1135
Mingkai Hub36ece82010-10-12 18:18:31 +08001136 master = fsl_spi_probe(&pdev->dev, mem, irq);
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001137 if (IS_ERR(master))
1138 return PTR_ERR(master);
1139 return 0;
1140}
1141
Anton Vorontsov575c5802009-06-18 16:49:08 -07001142static int __devexit plat_mpc8xxx_spi_remove(struct platform_device *pdev)
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001143{
Anton Vorontsov575c5802009-06-18 16:49:08 -07001144 return mpc8xxx_spi_remove(&pdev->dev);
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001145}
1146
Anton Vorontsov575c5802009-06-18 16:49:08 -07001147MODULE_ALIAS("platform:mpc8xxx_spi");
1148static struct platform_driver mpc8xxx_spi_driver = {
1149 .probe = plat_mpc8xxx_spi_probe,
Uwe Kleine-Königb3a08942009-11-24 21:07:27 +00001150 .remove = __devexit_p(plat_mpc8xxx_spi_remove),
Kumar Galaccf06992006-05-20 15:00:15 -07001151 .driver = {
Anton Vorontsov575c5802009-06-18 16:49:08 -07001152 .name = "mpc8xxx_spi",
Kay Sievers7e38c3c2008-04-10 21:29:20 -07001153 .owner = THIS_MODULE,
Kumar Galaccf06992006-05-20 15:00:15 -07001154 },
1155};
1156
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001157static bool legacy_driver_failed;
1158
1159static void __init legacy_driver_register(void)
1160{
Anton Vorontsov575c5802009-06-18 16:49:08 -07001161 legacy_driver_failed = platform_driver_register(&mpc8xxx_spi_driver);
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001162}
1163
1164static void __exit legacy_driver_unregister(void)
1165{
1166 if (legacy_driver_failed)
1167 return;
Anton Vorontsov575c5802009-06-18 16:49:08 -07001168 platform_driver_unregister(&mpc8xxx_spi_driver);
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001169}
1170#else
1171static void __init legacy_driver_register(void) {}
1172static void __exit legacy_driver_unregister(void) {}
1173#endif /* CONFIG_MPC832x_RDB */
1174
Mingkai Hub36ece82010-10-12 18:18:31 +08001175static int __init fsl_spi_init(void)
Kumar Galaccf06992006-05-20 15:00:15 -07001176{
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001177 legacy_driver_register();
Grant Likely18d306d2011-02-22 21:02:43 -07001178 return platform_driver_register(&of_fsl_spi_driver);
Kumar Galaccf06992006-05-20 15:00:15 -07001179}
Mingkai Hub36ece82010-10-12 18:18:31 +08001180module_init(fsl_spi_init);
Kumar Galaccf06992006-05-20 15:00:15 -07001181
Mingkai Hub36ece82010-10-12 18:18:31 +08001182static void __exit fsl_spi_exit(void)
Kumar Galaccf06992006-05-20 15:00:15 -07001183{
Grant Likely18d306d2011-02-22 21:02:43 -07001184 platform_driver_unregister(&of_fsl_spi_driver);
Anton Vorontsov35b4b3c2009-03-31 15:24:37 -07001185 legacy_driver_unregister();
Kumar Galaccf06992006-05-20 15:00:15 -07001186}
Mingkai Hub36ece82010-10-12 18:18:31 +08001187module_exit(fsl_spi_exit);
Kumar Galaccf06992006-05-20 15:00:15 -07001188
1189MODULE_AUTHOR("Kumar Gala");
Mingkai Hub36ece82010-10-12 18:18:31 +08001190MODULE_DESCRIPTION("Simple Freescale SPI Driver");
Kumar Galaccf06992006-05-20 15:00:15 -07001191MODULE_LICENSE("GPL");