Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved. |
| 3 | * Copyright (C) 2008 Juergen Beisert |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License |
| 7 | * as published by the Free Software Foundation; either version 2 |
| 8 | * of the License, or (at your option) any later version. |
| 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 |
| 16 | * Free Software Foundation |
| 17 | * 51 Franklin Street, Fifth Floor |
| 18 | * Boston, MA 02110-1301, USA. |
| 19 | */ |
| 20 | |
| 21 | #include <linux/clk.h> |
| 22 | #include <linux/completion.h> |
| 23 | #include <linux/delay.h> |
| 24 | #include <linux/err.h> |
| 25 | #include <linux/gpio.h> |
| 26 | #include <linux/init.h> |
| 27 | #include <linux/interrupt.h> |
| 28 | #include <linux/io.h> |
| 29 | #include <linux/irq.h> |
| 30 | #include <linux/kernel.h> |
| 31 | #include <linux/module.h> |
| 32 | #include <linux/platform_device.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 33 | #include <linux/slab.h> |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 34 | #include <linux/spi/spi.h> |
| 35 | #include <linux/spi/spi_bitbang.h> |
| 36 | #include <linux/types.h> |
Shawn Guo | 22a85e4 | 2011-07-10 01:16:41 +0800 | [diff] [blame] | 37 | #include <linux/of.h> |
| 38 | #include <linux/of_device.h> |
| 39 | #include <linux/of_gpio.h> |
Shawn Guo | dffa27e | 2012-05-06 20:28:12 +0800 | [diff] [blame] | 40 | #include <linux/pinctrl/consumer.h> |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 41 | |
Arnd Bergmann | 82906b1 | 2012-08-24 15:14:29 +0200 | [diff] [blame] | 42 | #include <linux/platform_data/spi-imx.h> |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 43 | |
| 44 | #define DRIVER_NAME "spi_imx" |
| 45 | |
| 46 | #define MXC_CSPIRXDATA 0x00 |
| 47 | #define MXC_CSPITXDATA 0x04 |
| 48 | #define MXC_CSPICTRL 0x08 |
| 49 | #define MXC_CSPIINT 0x0c |
| 50 | #define MXC_RESET 0x1c |
| 51 | |
| 52 | /* generic defines to abstract from the different register layouts */ |
| 53 | #define MXC_INT_RR (1 << 0) /* Receive data ready interrupt */ |
| 54 | #define MXC_INT_TE (1 << 1) /* Transmit FIFO empty interrupt */ |
| 55 | |
| 56 | struct spi_imx_config { |
| 57 | unsigned int speed_hz; |
| 58 | unsigned int bpw; |
| 59 | unsigned int mode; |
Uwe Kleine-König | 3b2aa89 | 2010-09-10 09:42:29 +0200 | [diff] [blame] | 60 | u8 cs; |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 61 | }; |
| 62 | |
Uwe Kleine-König | f4ba631 | 2010-09-09 15:29:01 +0200 | [diff] [blame] | 63 | enum spi_imx_devtype { |
Shawn Guo | 04ee585 | 2011-07-10 01:16:39 +0800 | [diff] [blame] | 64 | IMX1_CSPI, |
| 65 | IMX21_CSPI, |
| 66 | IMX27_CSPI, |
| 67 | IMX31_CSPI, |
| 68 | IMX35_CSPI, /* CSPI on all i.mx except above */ |
| 69 | IMX51_ECSPI, /* ECSPI on i.mx51 and later */ |
Uwe Kleine-König | f4ba631 | 2010-09-09 15:29:01 +0200 | [diff] [blame] | 70 | }; |
| 71 | |
| 72 | struct spi_imx_data; |
| 73 | |
| 74 | struct spi_imx_devtype_data { |
| 75 | void (*intctrl)(struct spi_imx_data *, int); |
| 76 | int (*config)(struct spi_imx_data *, struct spi_imx_config *); |
| 77 | void (*trigger)(struct spi_imx_data *); |
| 78 | int (*rx_available)(struct spi_imx_data *); |
Uwe Kleine-König | 1723e66 | 2010-09-10 09:19:18 +0200 | [diff] [blame] | 79 | void (*reset)(struct spi_imx_data *); |
Shawn Guo | 04ee585 | 2011-07-10 01:16:39 +0800 | [diff] [blame] | 80 | enum spi_imx_devtype devtype; |
Uwe Kleine-König | f4ba631 | 2010-09-09 15:29:01 +0200 | [diff] [blame] | 81 | }; |
| 82 | |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 83 | struct spi_imx_data { |
| 84 | struct spi_bitbang bitbang; |
| 85 | |
| 86 | struct completion xfer_done; |
Uwe Kleine-König | cc4d22a | 2012-03-29 21:54:18 +0200 | [diff] [blame] | 87 | void __iomem *base; |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 88 | int irq; |
Sascha Hauer | aa29d84 | 2012-03-07 09:30:22 +0100 | [diff] [blame] | 89 | struct clk *clk_per; |
| 90 | struct clk *clk_ipg; |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 91 | unsigned long spi_clk; |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 92 | |
| 93 | unsigned int count; |
| 94 | void (*tx)(struct spi_imx_data *); |
| 95 | void (*rx)(struct spi_imx_data *); |
| 96 | void *rx_buf; |
| 97 | const void *tx_buf; |
| 98 | unsigned int txfifo; /* number of words pushed in tx FIFO */ |
| 99 | |
Uwe Kleine-König | 80023cb | 2012-05-21 21:49:35 +0200 | [diff] [blame] | 100 | const struct spi_imx_devtype_data *devtype_data; |
Shawn Guo | c2387cb | 2011-07-10 01:16:40 +0800 | [diff] [blame] | 101 | int chipselect[0]; |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 102 | }; |
| 103 | |
Shawn Guo | 04ee585 | 2011-07-10 01:16:39 +0800 | [diff] [blame] | 104 | static inline int is_imx27_cspi(struct spi_imx_data *d) |
| 105 | { |
| 106 | return d->devtype_data->devtype == IMX27_CSPI; |
| 107 | } |
| 108 | |
| 109 | static inline int is_imx35_cspi(struct spi_imx_data *d) |
| 110 | { |
| 111 | return d->devtype_data->devtype == IMX35_CSPI; |
| 112 | } |
| 113 | |
| 114 | static inline unsigned spi_imx_get_fifosize(struct spi_imx_data *d) |
| 115 | { |
| 116 | return (d->devtype_data->devtype == IMX51_ECSPI) ? 64 : 8; |
| 117 | } |
| 118 | |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 119 | #define MXC_SPI_BUF_RX(type) \ |
| 120 | static void spi_imx_buf_rx_##type(struct spi_imx_data *spi_imx) \ |
| 121 | { \ |
| 122 | unsigned int val = readl(spi_imx->base + MXC_CSPIRXDATA); \ |
| 123 | \ |
| 124 | if (spi_imx->rx_buf) { \ |
| 125 | *(type *)spi_imx->rx_buf = val; \ |
| 126 | spi_imx->rx_buf += sizeof(type); \ |
| 127 | } \ |
| 128 | } |
| 129 | |
| 130 | #define MXC_SPI_BUF_TX(type) \ |
| 131 | static void spi_imx_buf_tx_##type(struct spi_imx_data *spi_imx) \ |
| 132 | { \ |
| 133 | type val = 0; \ |
| 134 | \ |
| 135 | if (spi_imx->tx_buf) { \ |
| 136 | val = *(type *)spi_imx->tx_buf; \ |
| 137 | spi_imx->tx_buf += sizeof(type); \ |
| 138 | } \ |
| 139 | \ |
| 140 | spi_imx->count -= sizeof(type); \ |
| 141 | \ |
| 142 | writel(val, spi_imx->base + MXC_CSPITXDATA); \ |
| 143 | } |
| 144 | |
| 145 | MXC_SPI_BUF_RX(u8) |
| 146 | MXC_SPI_BUF_TX(u8) |
| 147 | MXC_SPI_BUF_RX(u16) |
| 148 | MXC_SPI_BUF_TX(u16) |
| 149 | MXC_SPI_BUF_RX(u32) |
| 150 | MXC_SPI_BUF_TX(u32) |
| 151 | |
| 152 | /* First entry is reserved, second entry is valid only if SDHC_SPIEN is set |
| 153 | * (which is currently not the case in this driver) |
| 154 | */ |
| 155 | static int mxc_clkdivs[] = {0, 3, 4, 6, 8, 12, 16, 24, 32, 48, 64, 96, 128, 192, |
| 156 | 256, 384, 512, 768, 1024}; |
| 157 | |
| 158 | /* MX21, MX27 */ |
| 159 | static unsigned int spi_imx_clkdiv_1(unsigned int fin, |
Shawn Guo | 04ee585 | 2011-07-10 01:16:39 +0800 | [diff] [blame] | 160 | unsigned int fspi, unsigned int max) |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 161 | { |
Shawn Guo | 04ee585 | 2011-07-10 01:16:39 +0800 | [diff] [blame] | 162 | int i; |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 163 | |
| 164 | for (i = 2; i < max; i++) |
| 165 | if (fspi * mxc_clkdivs[i] >= fin) |
| 166 | return i; |
| 167 | |
| 168 | return max; |
| 169 | } |
| 170 | |
Uwe Kleine-König | 0b59960 | 2010-09-09 21:02:48 +0200 | [diff] [blame] | 171 | /* MX1, MX31, MX35, MX51 CSPI */ |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 172 | static unsigned int spi_imx_clkdiv_2(unsigned int fin, |
| 173 | unsigned int fspi) |
| 174 | { |
| 175 | int i, div = 4; |
| 176 | |
| 177 | for (i = 0; i < 7; i++) { |
| 178 | if (fspi * div >= fin) |
| 179 | return i; |
| 180 | div <<= 1; |
| 181 | } |
| 182 | |
| 183 | return 7; |
| 184 | } |
| 185 | |
Shawn Guo | 66de757 | 2011-07-10 01:16:37 +0800 | [diff] [blame] | 186 | #define MX51_ECSPI_CTRL 0x08 |
| 187 | #define MX51_ECSPI_CTRL_ENABLE (1 << 0) |
| 188 | #define MX51_ECSPI_CTRL_XCH (1 << 2) |
| 189 | #define MX51_ECSPI_CTRL_MODE_MASK (0xf << 4) |
| 190 | #define MX51_ECSPI_CTRL_POSTDIV_OFFSET 8 |
| 191 | #define MX51_ECSPI_CTRL_PREDIV_OFFSET 12 |
| 192 | #define MX51_ECSPI_CTRL_CS(cs) ((cs) << 18) |
| 193 | #define MX51_ECSPI_CTRL_BL_OFFSET 20 |
Uwe Kleine-König | 0b59960 | 2010-09-09 21:02:48 +0200 | [diff] [blame] | 194 | |
Shawn Guo | 66de757 | 2011-07-10 01:16:37 +0800 | [diff] [blame] | 195 | #define MX51_ECSPI_CONFIG 0x0c |
| 196 | #define MX51_ECSPI_CONFIG_SCLKPHA(cs) (1 << ((cs) + 0)) |
| 197 | #define MX51_ECSPI_CONFIG_SCLKPOL(cs) (1 << ((cs) + 4)) |
| 198 | #define MX51_ECSPI_CONFIG_SBBCTRL(cs) (1 << ((cs) + 8)) |
| 199 | #define MX51_ECSPI_CONFIG_SSBPOL(cs) (1 << ((cs) + 12)) |
Knut Wohlrab | c09b890 | 2012-09-25 13:21:57 +0200 | [diff] [blame] | 200 | #define MX51_ECSPI_CONFIG_SCLKCTL(cs) (1 << ((cs) + 20)) |
Uwe Kleine-König | 0b59960 | 2010-09-09 21:02:48 +0200 | [diff] [blame] | 201 | |
Shawn Guo | 66de757 | 2011-07-10 01:16:37 +0800 | [diff] [blame] | 202 | #define MX51_ECSPI_INT 0x10 |
| 203 | #define MX51_ECSPI_INT_TEEN (1 << 0) |
| 204 | #define MX51_ECSPI_INT_RREN (1 << 3) |
Uwe Kleine-König | 0b59960 | 2010-09-09 21:02:48 +0200 | [diff] [blame] | 205 | |
Shawn Guo | 66de757 | 2011-07-10 01:16:37 +0800 | [diff] [blame] | 206 | #define MX51_ECSPI_STAT 0x18 |
| 207 | #define MX51_ECSPI_STAT_RR (1 << 3) |
Uwe Kleine-König | 0b59960 | 2010-09-09 21:02:48 +0200 | [diff] [blame] | 208 | |
| 209 | /* MX51 eCSPI */ |
Shawn Guo | 66de757 | 2011-07-10 01:16:37 +0800 | [diff] [blame] | 210 | static unsigned int mx51_ecspi_clkdiv(unsigned int fin, unsigned int fspi) |
Uwe Kleine-König | 0b59960 | 2010-09-09 21:02:48 +0200 | [diff] [blame] | 211 | { |
| 212 | /* |
| 213 | * there are two 4-bit dividers, the pre-divider divides by |
| 214 | * $pre, the post-divider by 2^$post |
| 215 | */ |
| 216 | unsigned int pre, post; |
| 217 | |
| 218 | if (unlikely(fspi > fin)) |
| 219 | return 0; |
| 220 | |
| 221 | post = fls(fin) - fls(fspi); |
| 222 | if (fin > fspi << post) |
| 223 | post++; |
| 224 | |
| 225 | /* now we have: (fin <= fspi << post) with post being minimal */ |
| 226 | |
| 227 | post = max(4U, post) - 4; |
| 228 | if (unlikely(post > 0xf)) { |
| 229 | pr_err("%s: cannot set clock freq: %u (base freq: %u)\n", |
| 230 | __func__, fspi, fin); |
| 231 | return 0xff; |
| 232 | } |
| 233 | |
| 234 | pre = DIV_ROUND_UP(fin, fspi << post) - 1; |
| 235 | |
| 236 | pr_debug("%s: fin: %u, fspi: %u, post: %u, pre: %u\n", |
| 237 | __func__, fin, fspi, post, pre); |
Shawn Guo | 66de757 | 2011-07-10 01:16:37 +0800 | [diff] [blame] | 238 | return (pre << MX51_ECSPI_CTRL_PREDIV_OFFSET) | |
| 239 | (post << MX51_ECSPI_CTRL_POSTDIV_OFFSET); |
Uwe Kleine-König | 0b59960 | 2010-09-09 21:02:48 +0200 | [diff] [blame] | 240 | } |
| 241 | |
Shawn Guo | 66de757 | 2011-07-10 01:16:37 +0800 | [diff] [blame] | 242 | static void __maybe_unused mx51_ecspi_intctrl(struct spi_imx_data *spi_imx, int enable) |
Uwe Kleine-König | 0b59960 | 2010-09-09 21:02:48 +0200 | [diff] [blame] | 243 | { |
| 244 | unsigned val = 0; |
| 245 | |
| 246 | if (enable & MXC_INT_TE) |
Shawn Guo | 66de757 | 2011-07-10 01:16:37 +0800 | [diff] [blame] | 247 | val |= MX51_ECSPI_INT_TEEN; |
Uwe Kleine-König | 0b59960 | 2010-09-09 21:02:48 +0200 | [diff] [blame] | 248 | |
| 249 | if (enable & MXC_INT_RR) |
Shawn Guo | 66de757 | 2011-07-10 01:16:37 +0800 | [diff] [blame] | 250 | val |= MX51_ECSPI_INT_RREN; |
Uwe Kleine-König | 0b59960 | 2010-09-09 21:02:48 +0200 | [diff] [blame] | 251 | |
Shawn Guo | 66de757 | 2011-07-10 01:16:37 +0800 | [diff] [blame] | 252 | writel(val, spi_imx->base + MX51_ECSPI_INT); |
Uwe Kleine-König | 0b59960 | 2010-09-09 21:02:48 +0200 | [diff] [blame] | 253 | } |
| 254 | |
Shawn Guo | 66de757 | 2011-07-10 01:16:37 +0800 | [diff] [blame] | 255 | static void __maybe_unused mx51_ecspi_trigger(struct spi_imx_data *spi_imx) |
Uwe Kleine-König | 0b59960 | 2010-09-09 21:02:48 +0200 | [diff] [blame] | 256 | { |
| 257 | u32 reg; |
| 258 | |
Shawn Guo | 66de757 | 2011-07-10 01:16:37 +0800 | [diff] [blame] | 259 | reg = readl(spi_imx->base + MX51_ECSPI_CTRL); |
| 260 | reg |= MX51_ECSPI_CTRL_XCH; |
| 261 | writel(reg, spi_imx->base + MX51_ECSPI_CTRL); |
Uwe Kleine-König | 0b59960 | 2010-09-09 21:02:48 +0200 | [diff] [blame] | 262 | } |
| 263 | |
Shawn Guo | 66de757 | 2011-07-10 01:16:37 +0800 | [diff] [blame] | 264 | static int __maybe_unused mx51_ecspi_config(struct spi_imx_data *spi_imx, |
Uwe Kleine-König | 0b59960 | 2010-09-09 21:02:48 +0200 | [diff] [blame] | 265 | struct spi_imx_config *config) |
| 266 | { |
Shawn Guo | 66de757 | 2011-07-10 01:16:37 +0800 | [diff] [blame] | 267 | u32 ctrl = MX51_ECSPI_CTRL_ENABLE, cfg = 0; |
Uwe Kleine-König | 0b59960 | 2010-09-09 21:02:48 +0200 | [diff] [blame] | 268 | |
Sascha Hauer | f020c39 | 2011-02-08 21:08:59 +0100 | [diff] [blame] | 269 | /* |
| 270 | * The hardware seems to have a race condition when changing modes. The |
| 271 | * current assumption is that the selection of the channel arrives |
| 272 | * earlier in the hardware than the mode bits when they are written at |
| 273 | * the same time. |
| 274 | * So set master mode for all channels as we do not support slave mode. |
| 275 | */ |
Shawn Guo | 66de757 | 2011-07-10 01:16:37 +0800 | [diff] [blame] | 276 | ctrl |= MX51_ECSPI_CTRL_MODE_MASK; |
Uwe Kleine-König | 0b59960 | 2010-09-09 21:02:48 +0200 | [diff] [blame] | 277 | |
| 278 | /* set clock speed */ |
Shawn Guo | 66de757 | 2011-07-10 01:16:37 +0800 | [diff] [blame] | 279 | ctrl |= mx51_ecspi_clkdiv(spi_imx->spi_clk, config->speed_hz); |
Uwe Kleine-König | 0b59960 | 2010-09-09 21:02:48 +0200 | [diff] [blame] | 280 | |
| 281 | /* set chip select to use */ |
Shawn Guo | 66de757 | 2011-07-10 01:16:37 +0800 | [diff] [blame] | 282 | ctrl |= MX51_ECSPI_CTRL_CS(config->cs); |
Uwe Kleine-König | 0b59960 | 2010-09-09 21:02:48 +0200 | [diff] [blame] | 283 | |
Shawn Guo | 66de757 | 2011-07-10 01:16:37 +0800 | [diff] [blame] | 284 | ctrl |= (config->bpw - 1) << MX51_ECSPI_CTRL_BL_OFFSET; |
Uwe Kleine-König | 0b59960 | 2010-09-09 21:02:48 +0200 | [diff] [blame] | 285 | |
Shawn Guo | 66de757 | 2011-07-10 01:16:37 +0800 | [diff] [blame] | 286 | cfg |= MX51_ECSPI_CONFIG_SBBCTRL(config->cs); |
Uwe Kleine-König | 0b59960 | 2010-09-09 21:02:48 +0200 | [diff] [blame] | 287 | |
| 288 | if (config->mode & SPI_CPHA) |
Shawn Guo | 66de757 | 2011-07-10 01:16:37 +0800 | [diff] [blame] | 289 | cfg |= MX51_ECSPI_CONFIG_SCLKPHA(config->cs); |
Uwe Kleine-König | 0b59960 | 2010-09-09 21:02:48 +0200 | [diff] [blame] | 290 | |
Knut Wohlrab | c09b890 | 2012-09-25 13:21:57 +0200 | [diff] [blame] | 291 | if (config->mode & SPI_CPOL) { |
Shawn Guo | 66de757 | 2011-07-10 01:16:37 +0800 | [diff] [blame] | 292 | cfg |= MX51_ECSPI_CONFIG_SCLKPOL(config->cs); |
Knut Wohlrab | c09b890 | 2012-09-25 13:21:57 +0200 | [diff] [blame] | 293 | cfg |= MX51_ECSPI_CONFIG_SCLKCTL(config->cs); |
| 294 | } |
Uwe Kleine-König | 0b59960 | 2010-09-09 21:02:48 +0200 | [diff] [blame] | 295 | if (config->mode & SPI_CS_HIGH) |
Shawn Guo | 66de757 | 2011-07-10 01:16:37 +0800 | [diff] [blame] | 296 | cfg |= MX51_ECSPI_CONFIG_SSBPOL(config->cs); |
Uwe Kleine-König | 0b59960 | 2010-09-09 21:02:48 +0200 | [diff] [blame] | 297 | |
Shawn Guo | 66de757 | 2011-07-10 01:16:37 +0800 | [diff] [blame] | 298 | writel(ctrl, spi_imx->base + MX51_ECSPI_CTRL); |
| 299 | writel(cfg, spi_imx->base + MX51_ECSPI_CONFIG); |
Uwe Kleine-König | 0b59960 | 2010-09-09 21:02:48 +0200 | [diff] [blame] | 300 | |
| 301 | return 0; |
| 302 | } |
| 303 | |
Shawn Guo | 66de757 | 2011-07-10 01:16:37 +0800 | [diff] [blame] | 304 | static int __maybe_unused mx51_ecspi_rx_available(struct spi_imx_data *spi_imx) |
Uwe Kleine-König | 0b59960 | 2010-09-09 21:02:48 +0200 | [diff] [blame] | 305 | { |
Shawn Guo | 66de757 | 2011-07-10 01:16:37 +0800 | [diff] [blame] | 306 | return readl(spi_imx->base + MX51_ECSPI_STAT) & MX51_ECSPI_STAT_RR; |
Uwe Kleine-König | 0b59960 | 2010-09-09 21:02:48 +0200 | [diff] [blame] | 307 | } |
| 308 | |
Shawn Guo | 66de757 | 2011-07-10 01:16:37 +0800 | [diff] [blame] | 309 | static void __maybe_unused mx51_ecspi_reset(struct spi_imx_data *spi_imx) |
Uwe Kleine-König | 0b59960 | 2010-09-09 21:02:48 +0200 | [diff] [blame] | 310 | { |
| 311 | /* drain receive buffer */ |
Shawn Guo | 66de757 | 2011-07-10 01:16:37 +0800 | [diff] [blame] | 312 | while (mx51_ecspi_rx_available(spi_imx)) |
Uwe Kleine-König | 0b59960 | 2010-09-09 21:02:48 +0200 | [diff] [blame] | 313 | readl(spi_imx->base + MXC_CSPIRXDATA); |
| 314 | } |
| 315 | |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 316 | #define MX31_INTREG_TEEN (1 << 0) |
| 317 | #define MX31_INTREG_RREN (1 << 3) |
| 318 | |
| 319 | #define MX31_CSPICTRL_ENABLE (1 << 0) |
| 320 | #define MX31_CSPICTRL_MASTER (1 << 1) |
| 321 | #define MX31_CSPICTRL_XCH (1 << 2) |
| 322 | #define MX31_CSPICTRL_POL (1 << 4) |
| 323 | #define MX31_CSPICTRL_PHA (1 << 5) |
| 324 | #define MX31_CSPICTRL_SSCTL (1 << 6) |
| 325 | #define MX31_CSPICTRL_SSPOL (1 << 7) |
| 326 | #define MX31_CSPICTRL_BC_SHIFT 8 |
| 327 | #define MX35_CSPICTRL_BL_SHIFT 20 |
| 328 | #define MX31_CSPICTRL_CS_SHIFT 24 |
| 329 | #define MX35_CSPICTRL_CS_SHIFT 12 |
| 330 | #define MX31_CSPICTRL_DR_SHIFT 16 |
| 331 | |
| 332 | #define MX31_CSPISTATUS 0x14 |
| 333 | #define MX31_STATUS_RR (1 << 3) |
| 334 | |
| 335 | /* These functions also work for the i.MX35, but be aware that |
| 336 | * the i.MX35 has a slightly different register layout for bits |
| 337 | * we do not use here. |
| 338 | */ |
Uwe Kleine-König | f4ba631 | 2010-09-09 15:29:01 +0200 | [diff] [blame] | 339 | static void __maybe_unused mx31_intctrl(struct spi_imx_data *spi_imx, int enable) |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 340 | { |
| 341 | unsigned int val = 0; |
| 342 | |
| 343 | if (enable & MXC_INT_TE) |
| 344 | val |= MX31_INTREG_TEEN; |
| 345 | if (enable & MXC_INT_RR) |
| 346 | val |= MX31_INTREG_RREN; |
| 347 | |
| 348 | writel(val, spi_imx->base + MXC_CSPIINT); |
| 349 | } |
| 350 | |
Uwe Kleine-König | f4ba631 | 2010-09-09 15:29:01 +0200 | [diff] [blame] | 351 | static void __maybe_unused mx31_trigger(struct spi_imx_data *spi_imx) |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 352 | { |
| 353 | unsigned int reg; |
| 354 | |
| 355 | reg = readl(spi_imx->base + MXC_CSPICTRL); |
| 356 | reg |= MX31_CSPICTRL_XCH; |
| 357 | writel(reg, spi_imx->base + MXC_CSPICTRL); |
| 358 | } |
| 359 | |
Shawn Guo | 2a64a90 | 2011-07-10 01:16:38 +0800 | [diff] [blame] | 360 | static int __maybe_unused mx31_config(struct spi_imx_data *spi_imx, |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 361 | struct spi_imx_config *config) |
| 362 | { |
| 363 | unsigned int reg = MX31_CSPICTRL_ENABLE | MX31_CSPICTRL_MASTER; |
Uwe Kleine-König | 3b2aa89 | 2010-09-10 09:42:29 +0200 | [diff] [blame] | 364 | int cs = spi_imx->chipselect[config->cs]; |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 365 | |
| 366 | reg |= spi_imx_clkdiv_2(spi_imx->spi_clk, config->speed_hz) << |
| 367 | MX31_CSPICTRL_DR_SHIFT; |
| 368 | |
Shawn Guo | 04ee585 | 2011-07-10 01:16:39 +0800 | [diff] [blame] | 369 | if (is_imx35_cspi(spi_imx)) { |
Shawn Guo | 2a64a90 | 2011-07-10 01:16:38 +0800 | [diff] [blame] | 370 | reg |= (config->bpw - 1) << MX35_CSPICTRL_BL_SHIFT; |
| 371 | reg |= MX31_CSPICTRL_SSCTL; |
| 372 | } else { |
| 373 | reg |= (config->bpw - 1) << MX31_CSPICTRL_BC_SHIFT; |
| 374 | } |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 375 | |
| 376 | if (config->mode & SPI_CPHA) |
| 377 | reg |= MX31_CSPICTRL_PHA; |
| 378 | if (config->mode & SPI_CPOL) |
| 379 | reg |= MX31_CSPICTRL_POL; |
| 380 | if (config->mode & SPI_CS_HIGH) |
| 381 | reg |= MX31_CSPICTRL_SSPOL; |
Uwe Kleine-König | 3b2aa89 | 2010-09-10 09:42:29 +0200 | [diff] [blame] | 382 | if (cs < 0) |
Shawn Guo | 2a64a90 | 2011-07-10 01:16:38 +0800 | [diff] [blame] | 383 | reg |= (cs + 32) << |
Shawn Guo | 04ee585 | 2011-07-10 01:16:39 +0800 | [diff] [blame] | 384 | (is_imx35_cspi(spi_imx) ? MX35_CSPICTRL_CS_SHIFT : |
| 385 | MX31_CSPICTRL_CS_SHIFT); |
Uwe Kleine-König | 1723e66 | 2010-09-10 09:19:18 +0200 | [diff] [blame] | 386 | |
| 387 | writel(reg, spi_imx->base + MXC_CSPICTRL); |
| 388 | |
| 389 | return 0; |
| 390 | } |
| 391 | |
Uwe Kleine-König | f4ba631 | 2010-09-09 15:29:01 +0200 | [diff] [blame] | 392 | static int __maybe_unused mx31_rx_available(struct spi_imx_data *spi_imx) |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 393 | { |
| 394 | return readl(spi_imx->base + MX31_CSPISTATUS) & MX31_STATUS_RR; |
| 395 | } |
| 396 | |
Shawn Guo | 2a64a90 | 2011-07-10 01:16:38 +0800 | [diff] [blame] | 397 | static void __maybe_unused mx31_reset(struct spi_imx_data *spi_imx) |
Uwe Kleine-König | 1723e66 | 2010-09-10 09:19:18 +0200 | [diff] [blame] | 398 | { |
| 399 | /* drain receive buffer */ |
Shawn Guo | 2a64a90 | 2011-07-10 01:16:38 +0800 | [diff] [blame] | 400 | while (readl(spi_imx->base + MX31_CSPISTATUS) & MX31_STATUS_RR) |
Uwe Kleine-König | 1723e66 | 2010-09-10 09:19:18 +0200 | [diff] [blame] | 401 | readl(spi_imx->base + MXC_CSPIRXDATA); |
| 402 | } |
| 403 | |
Shawn Guo | 3451fb1 | 2011-07-10 01:16:36 +0800 | [diff] [blame] | 404 | #define MX21_INTREG_RR (1 << 4) |
| 405 | #define MX21_INTREG_TEEN (1 << 9) |
| 406 | #define MX21_INTREG_RREN (1 << 13) |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 407 | |
Shawn Guo | 3451fb1 | 2011-07-10 01:16:36 +0800 | [diff] [blame] | 408 | #define MX21_CSPICTRL_POL (1 << 5) |
| 409 | #define MX21_CSPICTRL_PHA (1 << 6) |
| 410 | #define MX21_CSPICTRL_SSPOL (1 << 8) |
| 411 | #define MX21_CSPICTRL_XCH (1 << 9) |
| 412 | #define MX21_CSPICTRL_ENABLE (1 << 10) |
| 413 | #define MX21_CSPICTRL_MASTER (1 << 11) |
| 414 | #define MX21_CSPICTRL_DR_SHIFT 14 |
| 415 | #define MX21_CSPICTRL_CS_SHIFT 19 |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 416 | |
Shawn Guo | 3451fb1 | 2011-07-10 01:16:36 +0800 | [diff] [blame] | 417 | static void __maybe_unused mx21_intctrl(struct spi_imx_data *spi_imx, int enable) |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 418 | { |
| 419 | unsigned int val = 0; |
| 420 | |
| 421 | if (enable & MXC_INT_TE) |
Shawn Guo | 3451fb1 | 2011-07-10 01:16:36 +0800 | [diff] [blame] | 422 | val |= MX21_INTREG_TEEN; |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 423 | if (enable & MXC_INT_RR) |
Shawn Guo | 3451fb1 | 2011-07-10 01:16:36 +0800 | [diff] [blame] | 424 | val |= MX21_INTREG_RREN; |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 425 | |
| 426 | writel(val, spi_imx->base + MXC_CSPIINT); |
| 427 | } |
| 428 | |
Shawn Guo | 3451fb1 | 2011-07-10 01:16:36 +0800 | [diff] [blame] | 429 | static void __maybe_unused mx21_trigger(struct spi_imx_data *spi_imx) |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 430 | { |
| 431 | unsigned int reg; |
| 432 | |
| 433 | reg = readl(spi_imx->base + MXC_CSPICTRL); |
Shawn Guo | 3451fb1 | 2011-07-10 01:16:36 +0800 | [diff] [blame] | 434 | reg |= MX21_CSPICTRL_XCH; |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 435 | writel(reg, spi_imx->base + MXC_CSPICTRL); |
| 436 | } |
| 437 | |
Shawn Guo | 3451fb1 | 2011-07-10 01:16:36 +0800 | [diff] [blame] | 438 | static int __maybe_unused mx21_config(struct spi_imx_data *spi_imx, |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 439 | struct spi_imx_config *config) |
| 440 | { |
Shawn Guo | 3451fb1 | 2011-07-10 01:16:36 +0800 | [diff] [blame] | 441 | unsigned int reg = MX21_CSPICTRL_ENABLE | MX21_CSPICTRL_MASTER; |
Uwe Kleine-König | 3b2aa89 | 2010-09-10 09:42:29 +0200 | [diff] [blame] | 442 | int cs = spi_imx->chipselect[config->cs]; |
Shawn Guo | 04ee585 | 2011-07-10 01:16:39 +0800 | [diff] [blame] | 443 | unsigned int max = is_imx27_cspi(spi_imx) ? 16 : 18; |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 444 | |
Shawn Guo | 04ee585 | 2011-07-10 01:16:39 +0800 | [diff] [blame] | 445 | reg |= spi_imx_clkdiv_1(spi_imx->spi_clk, config->speed_hz, max) << |
Shawn Guo | 3451fb1 | 2011-07-10 01:16:36 +0800 | [diff] [blame] | 446 | MX21_CSPICTRL_DR_SHIFT; |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 447 | reg |= config->bpw - 1; |
| 448 | |
| 449 | if (config->mode & SPI_CPHA) |
Shawn Guo | 3451fb1 | 2011-07-10 01:16:36 +0800 | [diff] [blame] | 450 | reg |= MX21_CSPICTRL_PHA; |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 451 | if (config->mode & SPI_CPOL) |
Shawn Guo | 3451fb1 | 2011-07-10 01:16:36 +0800 | [diff] [blame] | 452 | reg |= MX21_CSPICTRL_POL; |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 453 | if (config->mode & SPI_CS_HIGH) |
Shawn Guo | 3451fb1 | 2011-07-10 01:16:36 +0800 | [diff] [blame] | 454 | reg |= MX21_CSPICTRL_SSPOL; |
Uwe Kleine-König | 3b2aa89 | 2010-09-10 09:42:29 +0200 | [diff] [blame] | 455 | if (cs < 0) |
Shawn Guo | 3451fb1 | 2011-07-10 01:16:36 +0800 | [diff] [blame] | 456 | reg |= (cs + 32) << MX21_CSPICTRL_CS_SHIFT; |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 457 | |
| 458 | writel(reg, spi_imx->base + MXC_CSPICTRL); |
| 459 | |
| 460 | return 0; |
| 461 | } |
| 462 | |
Shawn Guo | 3451fb1 | 2011-07-10 01:16:36 +0800 | [diff] [blame] | 463 | static int __maybe_unused mx21_rx_available(struct spi_imx_data *spi_imx) |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 464 | { |
Shawn Guo | 3451fb1 | 2011-07-10 01:16:36 +0800 | [diff] [blame] | 465 | return readl(spi_imx->base + MXC_CSPIINT) & MX21_INTREG_RR; |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 466 | } |
| 467 | |
Shawn Guo | 3451fb1 | 2011-07-10 01:16:36 +0800 | [diff] [blame] | 468 | static void __maybe_unused mx21_reset(struct spi_imx_data *spi_imx) |
Uwe Kleine-König | 1723e66 | 2010-09-10 09:19:18 +0200 | [diff] [blame] | 469 | { |
| 470 | writel(1, spi_imx->base + MXC_RESET); |
| 471 | } |
| 472 | |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 473 | #define MX1_INTREG_RR (1 << 3) |
| 474 | #define MX1_INTREG_TEEN (1 << 8) |
| 475 | #define MX1_INTREG_RREN (1 << 11) |
| 476 | |
| 477 | #define MX1_CSPICTRL_POL (1 << 4) |
| 478 | #define MX1_CSPICTRL_PHA (1 << 5) |
| 479 | #define MX1_CSPICTRL_XCH (1 << 8) |
| 480 | #define MX1_CSPICTRL_ENABLE (1 << 9) |
| 481 | #define MX1_CSPICTRL_MASTER (1 << 10) |
| 482 | #define MX1_CSPICTRL_DR_SHIFT 13 |
| 483 | |
Uwe Kleine-König | f4ba631 | 2010-09-09 15:29:01 +0200 | [diff] [blame] | 484 | static void __maybe_unused mx1_intctrl(struct spi_imx_data *spi_imx, int enable) |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 485 | { |
| 486 | unsigned int val = 0; |
| 487 | |
| 488 | if (enable & MXC_INT_TE) |
| 489 | val |= MX1_INTREG_TEEN; |
| 490 | if (enable & MXC_INT_RR) |
| 491 | val |= MX1_INTREG_RREN; |
| 492 | |
| 493 | writel(val, spi_imx->base + MXC_CSPIINT); |
| 494 | } |
| 495 | |
Uwe Kleine-König | f4ba631 | 2010-09-09 15:29:01 +0200 | [diff] [blame] | 496 | static void __maybe_unused mx1_trigger(struct spi_imx_data *spi_imx) |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 497 | { |
| 498 | unsigned int reg; |
| 499 | |
| 500 | reg = readl(spi_imx->base + MXC_CSPICTRL); |
| 501 | reg |= MX1_CSPICTRL_XCH; |
| 502 | writel(reg, spi_imx->base + MXC_CSPICTRL); |
| 503 | } |
| 504 | |
Uwe Kleine-König | f4ba631 | 2010-09-09 15:29:01 +0200 | [diff] [blame] | 505 | static int __maybe_unused mx1_config(struct spi_imx_data *spi_imx, |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 506 | struct spi_imx_config *config) |
| 507 | { |
| 508 | unsigned int reg = MX1_CSPICTRL_ENABLE | MX1_CSPICTRL_MASTER; |
| 509 | |
| 510 | reg |= spi_imx_clkdiv_2(spi_imx->spi_clk, config->speed_hz) << |
| 511 | MX1_CSPICTRL_DR_SHIFT; |
| 512 | reg |= config->bpw - 1; |
| 513 | |
| 514 | if (config->mode & SPI_CPHA) |
| 515 | reg |= MX1_CSPICTRL_PHA; |
| 516 | if (config->mode & SPI_CPOL) |
| 517 | reg |= MX1_CSPICTRL_POL; |
| 518 | |
| 519 | writel(reg, spi_imx->base + MXC_CSPICTRL); |
| 520 | |
| 521 | return 0; |
| 522 | } |
| 523 | |
Uwe Kleine-König | f4ba631 | 2010-09-09 15:29:01 +0200 | [diff] [blame] | 524 | static int __maybe_unused mx1_rx_available(struct spi_imx_data *spi_imx) |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 525 | { |
| 526 | return readl(spi_imx->base + MXC_CSPIINT) & MX1_INTREG_RR; |
| 527 | } |
| 528 | |
Uwe Kleine-König | 1723e66 | 2010-09-10 09:19:18 +0200 | [diff] [blame] | 529 | static void __maybe_unused mx1_reset(struct spi_imx_data *spi_imx) |
| 530 | { |
| 531 | writel(1, spi_imx->base + MXC_RESET); |
| 532 | } |
| 533 | |
Shawn Guo | 04ee585 | 2011-07-10 01:16:39 +0800 | [diff] [blame] | 534 | static struct spi_imx_devtype_data imx1_cspi_devtype_data = { |
| 535 | .intctrl = mx1_intctrl, |
| 536 | .config = mx1_config, |
| 537 | .trigger = mx1_trigger, |
| 538 | .rx_available = mx1_rx_available, |
| 539 | .reset = mx1_reset, |
| 540 | .devtype = IMX1_CSPI, |
| 541 | }; |
| 542 | |
| 543 | static struct spi_imx_devtype_data imx21_cspi_devtype_data = { |
| 544 | .intctrl = mx21_intctrl, |
| 545 | .config = mx21_config, |
| 546 | .trigger = mx21_trigger, |
| 547 | .rx_available = mx21_rx_available, |
| 548 | .reset = mx21_reset, |
| 549 | .devtype = IMX21_CSPI, |
| 550 | }; |
| 551 | |
| 552 | static struct spi_imx_devtype_data imx27_cspi_devtype_data = { |
| 553 | /* i.mx27 cspi shares the functions with i.mx21 one */ |
| 554 | .intctrl = mx21_intctrl, |
| 555 | .config = mx21_config, |
| 556 | .trigger = mx21_trigger, |
| 557 | .rx_available = mx21_rx_available, |
| 558 | .reset = mx21_reset, |
| 559 | .devtype = IMX27_CSPI, |
| 560 | }; |
| 561 | |
| 562 | static struct spi_imx_devtype_data imx31_cspi_devtype_data = { |
| 563 | .intctrl = mx31_intctrl, |
| 564 | .config = mx31_config, |
| 565 | .trigger = mx31_trigger, |
| 566 | .rx_available = mx31_rx_available, |
| 567 | .reset = mx31_reset, |
| 568 | .devtype = IMX31_CSPI, |
| 569 | }; |
| 570 | |
| 571 | static struct spi_imx_devtype_data imx35_cspi_devtype_data = { |
| 572 | /* i.mx35 and later cspi shares the functions with i.mx31 one */ |
| 573 | .intctrl = mx31_intctrl, |
| 574 | .config = mx31_config, |
| 575 | .trigger = mx31_trigger, |
| 576 | .rx_available = mx31_rx_available, |
| 577 | .reset = mx31_reset, |
| 578 | .devtype = IMX35_CSPI, |
| 579 | }; |
| 580 | |
| 581 | static struct spi_imx_devtype_data imx51_ecspi_devtype_data = { |
| 582 | .intctrl = mx51_ecspi_intctrl, |
| 583 | .config = mx51_ecspi_config, |
| 584 | .trigger = mx51_ecspi_trigger, |
| 585 | .rx_available = mx51_ecspi_rx_available, |
| 586 | .reset = mx51_ecspi_reset, |
| 587 | .devtype = IMX51_ECSPI, |
| 588 | }; |
| 589 | |
| 590 | static struct platform_device_id spi_imx_devtype[] = { |
| 591 | { |
| 592 | .name = "imx1-cspi", |
| 593 | .driver_data = (kernel_ulong_t) &imx1_cspi_devtype_data, |
| 594 | }, { |
| 595 | .name = "imx21-cspi", |
| 596 | .driver_data = (kernel_ulong_t) &imx21_cspi_devtype_data, |
| 597 | }, { |
| 598 | .name = "imx27-cspi", |
| 599 | .driver_data = (kernel_ulong_t) &imx27_cspi_devtype_data, |
| 600 | }, { |
| 601 | .name = "imx31-cspi", |
| 602 | .driver_data = (kernel_ulong_t) &imx31_cspi_devtype_data, |
| 603 | }, { |
| 604 | .name = "imx35-cspi", |
| 605 | .driver_data = (kernel_ulong_t) &imx35_cspi_devtype_data, |
| 606 | }, { |
| 607 | .name = "imx51-ecspi", |
| 608 | .driver_data = (kernel_ulong_t) &imx51_ecspi_devtype_data, |
| 609 | }, { |
| 610 | /* sentinel */ |
| 611 | } |
Uwe Kleine-König | f4ba631 | 2010-09-09 15:29:01 +0200 | [diff] [blame] | 612 | }; |
| 613 | |
Shawn Guo | 22a85e4 | 2011-07-10 01:16:41 +0800 | [diff] [blame] | 614 | static const struct of_device_id spi_imx_dt_ids[] = { |
| 615 | { .compatible = "fsl,imx1-cspi", .data = &imx1_cspi_devtype_data, }, |
| 616 | { .compatible = "fsl,imx21-cspi", .data = &imx21_cspi_devtype_data, }, |
| 617 | { .compatible = "fsl,imx27-cspi", .data = &imx27_cspi_devtype_data, }, |
| 618 | { .compatible = "fsl,imx31-cspi", .data = &imx31_cspi_devtype_data, }, |
| 619 | { .compatible = "fsl,imx35-cspi", .data = &imx35_cspi_devtype_data, }, |
| 620 | { .compatible = "fsl,imx51-ecspi", .data = &imx51_ecspi_devtype_data, }, |
| 621 | { /* sentinel */ } |
| 622 | }; |
| 623 | |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 624 | static void spi_imx_chipselect(struct spi_device *spi, int is_active) |
| 625 | { |
| 626 | struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master); |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 627 | int gpio = spi_imx->chipselect[spi->chip_select]; |
Uwe Kleine-König | e6a0a8b | 2009-10-01 15:44:33 -0700 | [diff] [blame] | 628 | int active = is_active != BITBANG_CS_INACTIVE; |
| 629 | int dev_is_lowactive = !(spi->mode & SPI_CS_HIGH); |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 630 | |
Hui Wang | 8b17e05 | 2012-07-13 10:51:29 +0800 | [diff] [blame] | 631 | if (!gpio_is_valid(gpio)) |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 632 | return; |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 633 | |
Uwe Kleine-König | e6a0a8b | 2009-10-01 15:44:33 -0700 | [diff] [blame] | 634 | gpio_set_value(gpio, dev_is_lowactive ^ active); |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 635 | } |
| 636 | |
| 637 | static void spi_imx_push(struct spi_imx_data *spi_imx) |
| 638 | { |
Shawn Guo | 04ee585 | 2011-07-10 01:16:39 +0800 | [diff] [blame] | 639 | while (spi_imx->txfifo < spi_imx_get_fifosize(spi_imx)) { |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 640 | if (!spi_imx->count) |
| 641 | break; |
| 642 | spi_imx->tx(spi_imx); |
| 643 | spi_imx->txfifo++; |
| 644 | } |
| 645 | |
Shawn Guo | edd501bb | 2011-07-10 01:16:35 +0800 | [diff] [blame] | 646 | spi_imx->devtype_data->trigger(spi_imx); |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 647 | } |
| 648 | |
| 649 | static irqreturn_t spi_imx_isr(int irq, void *dev_id) |
| 650 | { |
| 651 | struct spi_imx_data *spi_imx = dev_id; |
| 652 | |
Shawn Guo | edd501bb | 2011-07-10 01:16:35 +0800 | [diff] [blame] | 653 | while (spi_imx->devtype_data->rx_available(spi_imx)) { |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 654 | spi_imx->rx(spi_imx); |
| 655 | spi_imx->txfifo--; |
| 656 | } |
| 657 | |
| 658 | if (spi_imx->count) { |
| 659 | spi_imx_push(spi_imx); |
| 660 | return IRQ_HANDLED; |
| 661 | } |
| 662 | |
| 663 | if (spi_imx->txfifo) { |
| 664 | /* No data left to push, but still waiting for rx data, |
| 665 | * enable receive data available interrupt. |
| 666 | */ |
Shawn Guo | edd501bb | 2011-07-10 01:16:35 +0800 | [diff] [blame] | 667 | spi_imx->devtype_data->intctrl( |
Uwe Kleine-König | f4ba631 | 2010-09-09 15:29:01 +0200 | [diff] [blame] | 668 | spi_imx, MXC_INT_RR); |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 669 | return IRQ_HANDLED; |
| 670 | } |
| 671 | |
Shawn Guo | edd501bb | 2011-07-10 01:16:35 +0800 | [diff] [blame] | 672 | spi_imx->devtype_data->intctrl(spi_imx, 0); |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 673 | complete(&spi_imx->xfer_done); |
| 674 | |
| 675 | return IRQ_HANDLED; |
| 676 | } |
| 677 | |
| 678 | static int spi_imx_setupxfer(struct spi_device *spi, |
| 679 | struct spi_transfer *t) |
| 680 | { |
| 681 | struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master); |
| 682 | struct spi_imx_config config; |
| 683 | |
| 684 | config.bpw = t ? t->bits_per_word : spi->bits_per_word; |
| 685 | config.speed_hz = t ? t->speed_hz : spi->max_speed_hz; |
| 686 | config.mode = spi->mode; |
Uwe Kleine-König | 3b2aa89 | 2010-09-10 09:42:29 +0200 | [diff] [blame] | 687 | config.cs = spi->chip_select; |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 688 | |
Sascha Hauer | 462d26b | 2009-10-01 15:44:29 -0700 | [diff] [blame] | 689 | if (!config.speed_hz) |
| 690 | config.speed_hz = spi->max_speed_hz; |
| 691 | if (!config.bpw) |
| 692 | config.bpw = spi->bits_per_word; |
Sascha Hauer | 462d26b | 2009-10-01 15:44:29 -0700 | [diff] [blame] | 693 | |
Uwe Kleine-König | e6a0a8b | 2009-10-01 15:44:33 -0700 | [diff] [blame] | 694 | /* Initialize the functions for transfer */ |
| 695 | if (config.bpw <= 8) { |
| 696 | spi_imx->rx = spi_imx_buf_rx_u8; |
| 697 | spi_imx->tx = spi_imx_buf_tx_u8; |
| 698 | } else if (config.bpw <= 16) { |
| 699 | spi_imx->rx = spi_imx_buf_rx_u16; |
| 700 | spi_imx->tx = spi_imx_buf_tx_u16; |
| 701 | } else if (config.bpw <= 32) { |
| 702 | spi_imx->rx = spi_imx_buf_rx_u32; |
| 703 | spi_imx->tx = spi_imx_buf_tx_u32; |
| 704 | } else |
| 705 | BUG(); |
| 706 | |
Shawn Guo | edd501bb | 2011-07-10 01:16:35 +0800 | [diff] [blame] | 707 | spi_imx->devtype_data->config(spi_imx, &config); |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 708 | |
| 709 | return 0; |
| 710 | } |
| 711 | |
| 712 | static int spi_imx_transfer(struct spi_device *spi, |
| 713 | struct spi_transfer *transfer) |
| 714 | { |
| 715 | struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master); |
| 716 | |
| 717 | spi_imx->tx_buf = transfer->tx_buf; |
| 718 | spi_imx->rx_buf = transfer->rx_buf; |
| 719 | spi_imx->count = transfer->len; |
| 720 | spi_imx->txfifo = 0; |
| 721 | |
| 722 | init_completion(&spi_imx->xfer_done); |
| 723 | |
| 724 | spi_imx_push(spi_imx); |
| 725 | |
Shawn Guo | edd501bb | 2011-07-10 01:16:35 +0800 | [diff] [blame] | 726 | spi_imx->devtype_data->intctrl(spi_imx, MXC_INT_TE); |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 727 | |
| 728 | wait_for_completion(&spi_imx->xfer_done); |
| 729 | |
| 730 | return transfer->len; |
| 731 | } |
| 732 | |
| 733 | static int spi_imx_setup(struct spi_device *spi) |
| 734 | { |
Sascha Hauer | 6c23e5d | 2009-10-01 15:44:29 -0700 | [diff] [blame] | 735 | struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master); |
| 736 | int gpio = spi_imx->chipselect[spi->chip_select]; |
| 737 | |
Alberto Panizzo | f4d4ecf | 2010-01-20 13:49:45 -0700 | [diff] [blame] | 738 | dev_dbg(&spi->dev, "%s: mode %d, %u bpw, %d hz\n", __func__, |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 739 | spi->mode, spi->bits_per_word, spi->max_speed_hz); |
| 740 | |
Hui Wang | 8b17e05 | 2012-07-13 10:51:29 +0800 | [diff] [blame] | 741 | if (gpio_is_valid(gpio)) |
Sascha Hauer | 6c23e5d | 2009-10-01 15:44:29 -0700 | [diff] [blame] | 742 | gpio_direction_output(gpio, spi->mode & SPI_CS_HIGH ? 0 : 1); |
| 743 | |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 744 | spi_imx_chipselect(spi, BITBANG_CS_INACTIVE); |
| 745 | |
| 746 | return 0; |
| 747 | } |
| 748 | |
| 749 | static void spi_imx_cleanup(struct spi_device *spi) |
| 750 | { |
| 751 | } |
| 752 | |
Grant Likely | fd4a319 | 2012-12-07 16:57:14 +0000 | [diff] [blame] | 753 | static int spi_imx_probe(struct platform_device *pdev) |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 754 | { |
Shawn Guo | 22a85e4 | 2011-07-10 01:16:41 +0800 | [diff] [blame] | 755 | struct device_node *np = pdev->dev.of_node; |
| 756 | const struct of_device_id *of_id = |
| 757 | of_match_device(spi_imx_dt_ids, &pdev->dev); |
| 758 | struct spi_imx_master *mxc_platform_info = |
| 759 | dev_get_platdata(&pdev->dev); |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 760 | struct spi_master *master; |
| 761 | struct spi_imx_data *spi_imx; |
| 762 | struct resource *res; |
Shawn Guo | dffa27e | 2012-05-06 20:28:12 +0800 | [diff] [blame] | 763 | struct pinctrl *pinctrl; |
Shawn Guo | c2387cb | 2011-07-10 01:16:40 +0800 | [diff] [blame] | 764 | int i, ret, num_cs; |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 765 | |
Shawn Guo | 22a85e4 | 2011-07-10 01:16:41 +0800 | [diff] [blame] | 766 | if (!np && !mxc_platform_info) { |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 767 | dev_err(&pdev->dev, "can't get the platform data\n"); |
| 768 | return -EINVAL; |
| 769 | } |
| 770 | |
Shawn Guo | 22a85e4 | 2011-07-10 01:16:41 +0800 | [diff] [blame] | 771 | ret = of_property_read_u32(np, "fsl,spi-num-chipselects", &num_cs); |
Lothar Waßmann | 39ec0d3 | 2012-04-03 15:03:44 +0200 | [diff] [blame] | 772 | if (ret < 0) { |
| 773 | if (mxc_platform_info) |
| 774 | num_cs = mxc_platform_info->num_chipselect; |
| 775 | else |
| 776 | return ret; |
| 777 | } |
Shawn Guo | 22a85e4 | 2011-07-10 01:16:41 +0800 | [diff] [blame] | 778 | |
Shawn Guo | c2387cb | 2011-07-10 01:16:40 +0800 | [diff] [blame] | 779 | master = spi_alloc_master(&pdev->dev, |
| 780 | sizeof(struct spi_imx_data) + sizeof(int) * num_cs); |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 781 | if (!master) |
| 782 | return -ENOMEM; |
| 783 | |
| 784 | platform_set_drvdata(pdev, master); |
| 785 | |
| 786 | master->bus_num = pdev->id; |
Shawn Guo | c2387cb | 2011-07-10 01:16:40 +0800 | [diff] [blame] | 787 | master->num_chipselect = num_cs; |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 788 | |
| 789 | spi_imx = spi_master_get_devdata(master); |
| 790 | spi_imx->bitbang.master = spi_master_get(master); |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 791 | |
| 792 | for (i = 0; i < master->num_chipselect; i++) { |
Shawn Guo | 22a85e4 | 2011-07-10 01:16:41 +0800 | [diff] [blame] | 793 | int cs_gpio = of_get_named_gpio(np, "cs-gpios", i); |
Hui Wang | 8b17e05 | 2012-07-13 10:51:29 +0800 | [diff] [blame] | 794 | if (!gpio_is_valid(cs_gpio) && mxc_platform_info) |
Shawn Guo | 22a85e4 | 2011-07-10 01:16:41 +0800 | [diff] [blame] | 795 | cs_gpio = mxc_platform_info->chipselect[i]; |
Fabio Estevam | 4cc122a | 2011-09-15 17:21:15 -0300 | [diff] [blame] | 796 | |
| 797 | spi_imx->chipselect[i] = cs_gpio; |
Hui Wang | 8b17e05 | 2012-07-13 10:51:29 +0800 | [diff] [blame] | 798 | if (!gpio_is_valid(cs_gpio)) |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 799 | continue; |
Fabio Estevam | 4cc122a | 2011-09-15 17:21:15 -0300 | [diff] [blame] | 800 | |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 801 | ret = gpio_request(spi_imx->chipselect[i], DRIVER_NAME); |
| 802 | if (ret) { |
John Ogness | bbd050a | 2009-11-24 16:53:07 +0000 | [diff] [blame] | 803 | dev_err(&pdev->dev, "can't get cs gpios\n"); |
Axel Lin | 00ffc13 | 2012-01-10 15:27:36 +0800 | [diff] [blame] | 804 | goto out_gpio_free; |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 805 | } |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 806 | } |
| 807 | |
| 808 | spi_imx->bitbang.chipselect = spi_imx_chipselect; |
| 809 | spi_imx->bitbang.setup_transfer = spi_imx_setupxfer; |
| 810 | spi_imx->bitbang.txrx_bufs = spi_imx_transfer; |
| 811 | spi_imx->bitbang.master->setup = spi_imx_setup; |
| 812 | spi_imx->bitbang.master->cleanup = spi_imx_cleanup; |
Sascha Hauer | 3910f2c | 2009-10-01 15:44:30 -0700 | [diff] [blame] | 813 | spi_imx->bitbang.master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH; |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 814 | |
| 815 | init_completion(&spi_imx->xfer_done); |
| 816 | |
Shawn Guo | 22a85e4 | 2011-07-10 01:16:41 +0800 | [diff] [blame] | 817 | spi_imx->devtype_data = of_id ? of_id->data : |
Shawn Guo | 04ee585 | 2011-07-10 01:16:39 +0800 | [diff] [blame] | 818 | (struct spi_imx_devtype_data *) pdev->id_entry->driver_data; |
Uwe Kleine-König | f4ba631 | 2010-09-09 15:29:01 +0200 | [diff] [blame] | 819 | |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 820 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 821 | if (!res) { |
| 822 | dev_err(&pdev->dev, "can't get platform resource\n"); |
| 823 | ret = -ENOMEM; |
| 824 | goto out_gpio_free; |
| 825 | } |
| 826 | |
| 827 | if (!request_mem_region(res->start, resource_size(res), pdev->name)) { |
| 828 | dev_err(&pdev->dev, "request_mem_region failed\n"); |
| 829 | ret = -EBUSY; |
| 830 | goto out_gpio_free; |
| 831 | } |
| 832 | |
| 833 | spi_imx->base = ioremap(res->start, resource_size(res)); |
| 834 | if (!spi_imx->base) { |
| 835 | ret = -EINVAL; |
| 836 | goto out_release_mem; |
| 837 | } |
| 838 | |
| 839 | spi_imx->irq = platform_get_irq(pdev, 0); |
Richard Genoud | 7357593 | 2011-01-07 15:26:01 +0100 | [diff] [blame] | 840 | if (spi_imx->irq < 0) { |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 841 | ret = -EINVAL; |
| 842 | goto out_iounmap; |
| 843 | } |
| 844 | |
| 845 | ret = request_irq(spi_imx->irq, spi_imx_isr, 0, DRIVER_NAME, spi_imx); |
| 846 | if (ret) { |
| 847 | dev_err(&pdev->dev, "can't get irq%d: %d\n", spi_imx->irq, ret); |
| 848 | goto out_iounmap; |
| 849 | } |
| 850 | |
Shawn Guo | dffa27e | 2012-05-06 20:28:12 +0800 | [diff] [blame] | 851 | pinctrl = devm_pinctrl_get_select_default(&pdev->dev); |
| 852 | if (IS_ERR(pinctrl)) { |
| 853 | ret = PTR_ERR(pinctrl); |
| 854 | goto out_free_irq; |
| 855 | } |
| 856 | |
Sascha Hauer | aa29d84 | 2012-03-07 09:30:22 +0100 | [diff] [blame] | 857 | spi_imx->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); |
| 858 | if (IS_ERR(spi_imx->clk_ipg)) { |
| 859 | ret = PTR_ERR(spi_imx->clk_ipg); |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 860 | goto out_free_irq; |
| 861 | } |
| 862 | |
Sascha Hauer | aa29d84 | 2012-03-07 09:30:22 +0100 | [diff] [blame] | 863 | spi_imx->clk_per = devm_clk_get(&pdev->dev, "per"); |
| 864 | if (IS_ERR(spi_imx->clk_per)) { |
| 865 | ret = PTR_ERR(spi_imx->clk_per); |
| 866 | goto out_free_irq; |
| 867 | } |
| 868 | |
| 869 | clk_prepare_enable(spi_imx->clk_per); |
| 870 | clk_prepare_enable(spi_imx->clk_ipg); |
| 871 | |
| 872 | spi_imx->spi_clk = clk_get_rate(spi_imx->clk_per); |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 873 | |
Shawn Guo | edd501bb | 2011-07-10 01:16:35 +0800 | [diff] [blame] | 874 | spi_imx->devtype_data->reset(spi_imx); |
Daniel Mack | ce1807b | 2009-11-19 19:01:42 +0000 | [diff] [blame] | 875 | |
Shawn Guo | edd501bb | 2011-07-10 01:16:35 +0800 | [diff] [blame] | 876 | spi_imx->devtype_data->intctrl(spi_imx, 0); |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 877 | |
Shawn Guo | 22a85e4 | 2011-07-10 01:16:41 +0800 | [diff] [blame] | 878 | master->dev.of_node = pdev->dev.of_node; |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 879 | ret = spi_bitbang_start(&spi_imx->bitbang); |
| 880 | if (ret) { |
| 881 | dev_err(&pdev->dev, "bitbang start failed with %d\n", ret); |
| 882 | goto out_clk_put; |
| 883 | } |
| 884 | |
| 885 | dev_info(&pdev->dev, "probed\n"); |
| 886 | |
| 887 | return ret; |
| 888 | |
| 889 | out_clk_put: |
Sascha Hauer | aa29d84 | 2012-03-07 09:30:22 +0100 | [diff] [blame] | 890 | clk_disable_unprepare(spi_imx->clk_per); |
| 891 | clk_disable_unprepare(spi_imx->clk_ipg); |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 892 | out_free_irq: |
| 893 | free_irq(spi_imx->irq, spi_imx); |
| 894 | out_iounmap: |
| 895 | iounmap(spi_imx->base); |
| 896 | out_release_mem: |
| 897 | release_mem_region(res->start, resource_size(res)); |
| 898 | out_gpio_free: |
Axel Lin | 00ffc13 | 2012-01-10 15:27:36 +0800 | [diff] [blame] | 899 | while (--i >= 0) { |
Hui Wang | 8b17e05 | 2012-07-13 10:51:29 +0800 | [diff] [blame] | 900 | if (gpio_is_valid(spi_imx->chipselect[i])) |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 901 | gpio_free(spi_imx->chipselect[i]); |
Axel Lin | 00ffc13 | 2012-01-10 15:27:36 +0800 | [diff] [blame] | 902 | } |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 903 | spi_master_put(master); |
| 904 | kfree(master); |
| 905 | platform_set_drvdata(pdev, NULL); |
| 906 | return ret; |
| 907 | } |
| 908 | |
Grant Likely | fd4a319 | 2012-12-07 16:57:14 +0000 | [diff] [blame] | 909 | static int spi_imx_remove(struct platform_device *pdev) |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 910 | { |
| 911 | struct spi_master *master = platform_get_drvdata(pdev); |
| 912 | struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 913 | struct spi_imx_data *spi_imx = spi_master_get_devdata(master); |
| 914 | int i; |
| 915 | |
| 916 | spi_bitbang_stop(&spi_imx->bitbang); |
| 917 | |
| 918 | writel(0, spi_imx->base + MXC_CSPICTRL); |
Sascha Hauer | aa29d84 | 2012-03-07 09:30:22 +0100 | [diff] [blame] | 919 | clk_disable_unprepare(spi_imx->clk_per); |
| 920 | clk_disable_unprepare(spi_imx->clk_ipg); |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 921 | free_irq(spi_imx->irq, spi_imx); |
| 922 | iounmap(spi_imx->base); |
| 923 | |
| 924 | for (i = 0; i < master->num_chipselect; i++) |
Hui Wang | 8b17e05 | 2012-07-13 10:51:29 +0800 | [diff] [blame] | 925 | if (gpio_is_valid(spi_imx->chipselect[i])) |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 926 | gpio_free(spi_imx->chipselect[i]); |
| 927 | |
| 928 | spi_master_put(master); |
| 929 | |
| 930 | release_mem_region(res->start, resource_size(res)); |
| 931 | |
| 932 | platform_set_drvdata(pdev, NULL); |
| 933 | |
| 934 | return 0; |
| 935 | } |
| 936 | |
| 937 | static struct platform_driver spi_imx_driver = { |
| 938 | .driver = { |
| 939 | .name = DRIVER_NAME, |
| 940 | .owner = THIS_MODULE, |
Shawn Guo | 22a85e4 | 2011-07-10 01:16:41 +0800 | [diff] [blame] | 941 | .of_match_table = spi_imx_dt_ids, |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 942 | }, |
Uwe Kleine-König | f4ba631 | 2010-09-09 15:29:01 +0200 | [diff] [blame] | 943 | .id_table = spi_imx_devtype, |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 944 | .probe = spi_imx_probe, |
Grant Likely | fd4a319 | 2012-12-07 16:57:14 +0000 | [diff] [blame] | 945 | .remove = spi_imx_remove, |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 946 | }; |
Grant Likely | 940ab88 | 2011-10-05 11:29:49 -0600 | [diff] [blame] | 947 | module_platform_driver(spi_imx_driver); |
Uwe Kleine-König | 6cdeb00 | 2009-10-01 15:44:28 -0700 | [diff] [blame] | 948 | |
| 949 | MODULE_DESCRIPTION("SPI Master Controller driver"); |
| 950 | MODULE_AUTHOR("Sascha Hauer, Pengutronix"); |
| 951 | MODULE_LICENSE("GPL"); |