Commit | Line | Data |
---|---|---|
ca632f55 | 1 | /* |
230d42d4 JB |
2 | * Copyright (C) 2009 Samsung Electronics Ltd. |
3 | * Jaswinder Singh <jassi.brar@samsung.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
230d42d4 JB |
14 | */ |
15 | ||
16 | #include <linux/init.h> | |
17 | #include <linux/module.h> | |
1cac41cb | 18 | #include <linux/workqueue.h> |
c2573128 | 19 | #include <linux/interrupt.h> |
230d42d4 JB |
20 | #include <linux/delay.h> |
21 | #include <linux/clk.h> | |
1cac41cb | 22 | #include <linux/clk-provider.h> |
230d42d4 | 23 | #include <linux/dma-mapping.h> |
78843727 | 24 | #include <linux/dmaengine.h> |
230d42d4 | 25 | #include <linux/platform_device.h> |
b97b6621 | 26 | #include <linux/pm_runtime.h> |
230d42d4 | 27 | #include <linux/spi/spi.h> |
1c20c200 | 28 | #include <linux/gpio.h> |
2b908075 TA |
29 | #include <linux/of.h> |
30 | #include <linux/of_gpio.h> | |
1cac41cb | 31 | #include <soc/samsung/exynos-powermode.h> |
230d42d4 | 32 | |
436d42c6 | 33 | #include <linux/platform_data/spi-s3c64xx.h> |
230d42d4 | 34 | |
1cac41cb MB |
35 | #include <linux/dma/dma-pl330.h> |
36 | ||
37 | #ifdef CONFIG_CPU_IDLE | |
38 | #include <soc/samsung/exynos-pm.h> | |
39 | #endif | |
40 | ||
41 | #include "../pinctrl/core.h" | |
42 | ||
43 | static LIST_HEAD(drvdata_list); | |
44 | ||
45 | #define MAX_SPI_PORTS 16 | |
46 | #define SPI_AUTOSUSPEND_TIMEOUT (100) | |
a5238e36 | 47 | |
230d42d4 JB |
48 | /* Registers and bit-fields */ |
49 | ||
50 | #define S3C64XX_SPI_CH_CFG 0x00 | |
51 | #define S3C64XX_SPI_CLK_CFG 0x04 | |
52 | #define S3C64XX_SPI_MODE_CFG 0x08 | |
53 | #define S3C64XX_SPI_SLAVE_SEL 0x0C | |
54 | #define S3C64XX_SPI_INT_EN 0x10 | |
55 | #define S3C64XX_SPI_STATUS 0x14 | |
56 | #define S3C64XX_SPI_TX_DATA 0x18 | |
57 | #define S3C64XX_SPI_RX_DATA 0x1C | |
58 | #define S3C64XX_SPI_PACKET_CNT 0x20 | |
59 | #define S3C64XX_SPI_PENDING_CLR 0x24 | |
60 | #define S3C64XX_SPI_SWAP_CFG 0x28 | |
61 | #define S3C64XX_SPI_FB_CLK 0x2C | |
62 | ||
63 | #define S3C64XX_SPI_CH_HS_EN (1<<6) /* High Speed Enable */ | |
64 | #define S3C64XX_SPI_CH_SW_RST (1<<5) | |
65 | #define S3C64XX_SPI_CH_SLAVE (1<<4) | |
66 | #define S3C64XX_SPI_CPOL_L (1<<3) | |
67 | #define S3C64XX_SPI_CPHA_B (1<<2) | |
68 | #define S3C64XX_SPI_CH_RXCH_ON (1<<1) | |
69 | #define S3C64XX_SPI_CH_TXCH_ON (1<<0) | |
70 | ||
71 | #define S3C64XX_SPI_CLKSEL_SRCMSK (3<<9) | |
72 | #define S3C64XX_SPI_CLKSEL_SRCSHFT 9 | |
73 | #define S3C64XX_SPI_ENCLK_ENABLE (1<<8) | |
75bf3361 | 74 | #define S3C64XX_SPI_PSR_MASK 0xff |
230d42d4 JB |
75 | |
76 | #define S3C64XX_SPI_MODE_CH_TSZ_BYTE (0<<29) | |
77 | #define S3C64XX_SPI_MODE_CH_TSZ_HALFWORD (1<<29) | |
78 | #define S3C64XX_SPI_MODE_CH_TSZ_WORD (2<<29) | |
79 | #define S3C64XX_SPI_MODE_CH_TSZ_MASK (3<<29) | |
80 | #define S3C64XX_SPI_MODE_BUS_TSZ_BYTE (0<<17) | |
81 | #define S3C64XX_SPI_MODE_BUS_TSZ_HALFWORD (1<<17) | |
82 | #define S3C64XX_SPI_MODE_BUS_TSZ_WORD (2<<17) | |
83 | #define S3C64XX_SPI_MODE_BUS_TSZ_MASK (3<<17) | |
84 | #define S3C64XX_SPI_MODE_RXDMA_ON (1<<2) | |
85 | #define S3C64XX_SPI_MODE_TXDMA_ON (1<<1) | |
86 | #define S3C64XX_SPI_MODE_4BURST (1<<0) | |
87 | ||
1cac41cb MB |
88 | #define S3C64XX_SPI_SLAVE_NSC_CNT_2 (2<<4) |
89 | #define S3C64XX_SPI_SLAVE_NSC_CNT_1 (1<<4) | |
230d42d4 JB |
90 | #define S3C64XX_SPI_SLAVE_AUTO (1<<1) |
91 | #define S3C64XX_SPI_SLAVE_SIG_INACT (1<<0) | |
92 | ||
230d42d4 JB |
93 | #define S3C64XX_SPI_INT_TRAILING_EN (1<<6) |
94 | #define S3C64XX_SPI_INT_RX_OVERRUN_EN (1<<5) | |
95 | #define S3C64XX_SPI_INT_RX_UNDERRUN_EN (1<<4) | |
96 | #define S3C64XX_SPI_INT_TX_OVERRUN_EN (1<<3) | |
97 | #define S3C64XX_SPI_INT_TX_UNDERRUN_EN (1<<2) | |
98 | #define S3C64XX_SPI_INT_RX_FIFORDY_EN (1<<1) | |
99 | #define S3C64XX_SPI_INT_TX_FIFORDY_EN (1<<0) | |
100 | ||
101 | #define S3C64XX_SPI_ST_RX_OVERRUN_ERR (1<<5) | |
102 | #define S3C64XX_SPI_ST_RX_UNDERRUN_ERR (1<<4) | |
103 | #define S3C64XX_SPI_ST_TX_OVERRUN_ERR (1<<3) | |
104 | #define S3C64XX_SPI_ST_TX_UNDERRUN_ERR (1<<2) | |
105 | #define S3C64XX_SPI_ST_RX_FIFORDY (1<<1) | |
106 | #define S3C64XX_SPI_ST_TX_FIFORDY (1<<0) | |
107 | ||
108 | #define S3C64XX_SPI_PACKET_CNT_EN (1<<16) | |
109 | ||
110 | #define S3C64XX_SPI_PND_TX_UNDERRUN_CLR (1<<4) | |
111 | #define S3C64XX_SPI_PND_TX_OVERRUN_CLR (1<<3) | |
112 | #define S3C64XX_SPI_PND_RX_UNDERRUN_CLR (1<<2) | |
113 | #define S3C64XX_SPI_PND_RX_OVERRUN_CLR (1<<1) | |
114 | #define S3C64XX_SPI_PND_TRAILING_CLR (1<<0) | |
115 | ||
116 | #define S3C64XX_SPI_SWAP_RX_HALF_WORD (1<<7) | |
117 | #define S3C64XX_SPI_SWAP_RX_BYTE (1<<6) | |
118 | #define S3C64XX_SPI_SWAP_RX_BIT (1<<5) | |
119 | #define S3C64XX_SPI_SWAP_RX_EN (1<<4) | |
120 | #define S3C64XX_SPI_SWAP_TX_HALF_WORD (1<<3) | |
121 | #define S3C64XX_SPI_SWAP_TX_BYTE (1<<2) | |
122 | #define S3C64XX_SPI_SWAP_TX_BIT (1<<1) | |
123 | #define S3C64XX_SPI_SWAP_TX_EN (1<<0) | |
124 | ||
125 | #define S3C64XX_SPI_FBCLK_MSK (3<<0) | |
126 | ||
a5238e36 TA |
127 | #define FIFO_LVL_MASK(i) ((i)->port_conf->fifo_lvl_mask[i->port_id]) |
128 | #define S3C64XX_SPI_ST_TX_DONE(v, i) (((v) & \ | |
129 | (1 << (i)->port_conf->tx_st_done)) ? 1 : 0) | |
130 | #define TX_FIFO_LVL(v, i) (((v) >> 6) & FIFO_LVL_MASK(i)) | |
131 | #define RX_FIFO_LVL(v, i) (((v) >> (i)->port_conf->rx_lvl_offset) & \ | |
132 | FIFO_LVL_MASK(i)) | |
230d42d4 JB |
133 | |
134 | #define S3C64XX_SPI_MAX_TRAILCNT 0x3ff | |
135 | #define S3C64XX_SPI_TRAILCNT_OFF 19 | |
136 | ||
137 | #define S3C64XX_SPI_TRAILCNT S3C64XX_SPI_MAX_TRAILCNT | |
138 | ||
1cac41cb MB |
139 | #define S3C64XX_SPI_DMA_4BURST_LEN 0x4 |
140 | #define S3C64XX_SPI_DMA_1BURST_LEN 0x1 | |
141 | ||
230d42d4 JB |
142 | #define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t) |
143 | ||
230d42d4 JB |
144 | #define RXBUSY (1<<2) |
145 | #define TXBUSY (1<<3) | |
146 | ||
1cac41cb | 147 | #define SPI_DBG_MODE (0x1 << 0) |
82ab8cd7 | 148 | |
a5238e36 TA |
149 | /** |
150 | * struct s3c64xx_spi_info - SPI Controller hardware info | |
151 | * @fifo_lvl_mask: Bit-mask for {TX|RX}_FIFO_LVL bits in SPI_STATUS register. | |
152 | * @rx_lvl_offset: Bit offset of RX_FIFO_LVL bits in SPI_STATUS regiter. | |
153 | * @tx_st_done: Bit offset of TX_DONE bit in SPI_STATUS regiter. | |
154 | * @high_speed: True, if the controller supports HIGH_SPEED_EN bit. | |
155 | * @clk_from_cmu: True, if the controller does not include a clock mux and | |
156 | * prescaler unit. | |
157 | * | |
158 | * The Samsung s3c64xx SPI controller are used on various Samsung SoC's but | |
159 | * differ in some aspects such as the size of the fifo and spi bus clock | |
160 | * setup. Such differences are specified to the driver using this structure | |
161 | * which is provided as driver data to the driver. | |
162 | */ | |
163 | struct s3c64xx_spi_port_config { | |
164 | int fifo_lvl_mask[MAX_SPI_PORTS]; | |
165 | int rx_lvl_offset; | |
166 | int tx_st_done; | |
167 | bool high_speed; | |
168 | bool clk_from_cmu; | |
169 | }; | |
170 | ||
1cac41cb MB |
171 | static ssize_t |
172 | spi_dbg_show(struct device *dev, struct device_attribute *attr, char *buf) | |
173 | { | |
174 | ssize_t ret = 0; | |
175 | ||
176 | ret += snprintf(buf + ret, PAGE_SIZE - ret, | |
177 | "SPI Debug Mode Configuration.\n"); | |
178 | ret += snprintf(buf + ret, PAGE_SIZE - ret, | |
179 | "0 : Change DBG mode.\n"); | |
180 | ret += snprintf(buf + ret, PAGE_SIZE - ret, | |
181 | "1 : Change Normal mode.\n"); | |
182 | ||
183 | if (ret < PAGE_SIZE - 1) { | |
184 | ret += snprintf(buf+ret, PAGE_SIZE-ret, "\n"); | |
185 | } else { | |
186 | buf[PAGE_SIZE-2] = '\n'; | |
187 | buf[PAGE_SIZE-1] = '\0'; | |
188 | ret = PAGE_SIZE-1; | |
189 | } | |
190 | ||
191 | return ret; | |
192 | } | |
193 | ||
194 | static ssize_t | |
195 | spi_dbg_store(struct device *dev, struct device_attribute *attr, | |
196 | const char *buf, size_t count) | |
197 | { | |
198 | struct spi_master *master = dev_get_drvdata(dev); | |
199 | struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master); | |
200 | struct s3c64xx_spi_info *sci = sdd->cntrlr_info; | |
201 | struct s3c64xx_spi_info *check_sci; | |
202 | int ret, input_cmd; | |
203 | ||
204 | ret = sscanf(buf, "%d", &input_cmd); | |
205 | ||
206 | list_for_each_entry(check_sci, &drvdata_list, node) { | |
207 | if (check_sci != sci) | |
208 | continue; | |
209 | ||
210 | switch(input_cmd) { | |
211 | case 0: | |
212 | printk(KERN_ERR "Change SPI%d to Loopback(DBG) mode\n", | |
213 | sdd->port_id); | |
214 | sci->dbg_mode = SPI_DBG_MODE; | |
215 | break; | |
216 | case 1: | |
217 | printk(KERN_ERR "Change SPI%d to normal mode\n", | |
218 | sdd->port_id); | |
219 | sci->dbg_mode = 0; | |
220 | break; | |
221 | default: | |
222 | printk(KERN_ERR "Wrong Command!(0/1)\n"); | |
223 | } | |
224 | } | |
225 | ||
226 | return count; | |
227 | } | |
228 | ||
229 | static DEVICE_ATTR(spi_dbg, 0640, spi_dbg_show, spi_dbg_store); | |
230 | ||
231 | static void s3c64xx_spi_dump_reg(struct s3c64xx_spi_driver_data *sdd) | |
232 | { | |
233 | void __iomem *regs = sdd->regs; | |
234 | struct device *dev = &sdd->pdev->dev; | |
230d42d4 | 235 | |
1cac41cb MB |
236 | dev_err(dev, "Register dump for SPI\n" |
237 | " CH_CFG 0x%08x\n" | |
238 | " MODE_CFG 0x%08x\n" | |
239 | " CS_REG 0x%08x\n" | |
240 | " STATUS 0x%08x\n" | |
241 | " PACKET_CNT 0x%08x\n" | |
242 | , readl(regs + S3C64XX_SPI_CH_CFG) | |
243 | , readl(regs + S3C64XX_SPI_MODE_CFG) | |
244 | , readl(regs + S3C64XX_SPI_SLAVE_SEL) | |
245 | , readl(regs + S3C64XX_SPI_STATUS) | |
246 | , readl(regs + S3C64XX_SPI_PACKET_CNT) | |
247 | ); | |
248 | ||
249 | } | |
230d42d4 JB |
250 | static void flush_fifo(struct s3c64xx_spi_driver_data *sdd) |
251 | { | |
230d42d4 JB |
252 | void __iomem *regs = sdd->regs; |
253 | unsigned long loops; | |
254 | u32 val; | |
255 | ||
256 | writel(0, regs + S3C64XX_SPI_PACKET_CNT); | |
257 | ||
7d859ff4 KK |
258 | val = readl(regs + S3C64XX_SPI_CH_CFG); |
259 | val &= ~(S3C64XX_SPI_CH_RXCH_ON | S3C64XX_SPI_CH_TXCH_ON); | |
260 | writel(val, regs + S3C64XX_SPI_CH_CFG); | |
261 | ||
230d42d4 JB |
262 | val = readl(regs + S3C64XX_SPI_CH_CFG); |
263 | val |= S3C64XX_SPI_CH_SW_RST; | |
264 | val &= ~S3C64XX_SPI_CH_HS_EN; | |
265 | writel(val, regs + S3C64XX_SPI_CH_CFG); | |
266 | ||
267 | /* Flush TxFIFO*/ | |
268 | loops = msecs_to_loops(1); | |
269 | do { | |
270 | val = readl(regs + S3C64XX_SPI_STATUS); | |
a5238e36 | 271 | } while (TX_FIFO_LVL(val, sdd) && loops--); |
230d42d4 | 272 | |
be7852a8 MB |
273 | if (loops == 0) |
274 | dev_warn(&sdd->pdev->dev, "Timed out flushing TX FIFO\n"); | |
275 | ||
230d42d4 JB |
276 | /* Flush RxFIFO*/ |
277 | loops = msecs_to_loops(1); | |
278 | do { | |
279 | val = readl(regs + S3C64XX_SPI_STATUS); | |
a5238e36 | 280 | if (RX_FIFO_LVL(val, sdd)) |
230d42d4 JB |
281 | readl(regs + S3C64XX_SPI_RX_DATA); |
282 | else | |
283 | break; | |
284 | } while (loops--); | |
285 | ||
be7852a8 MB |
286 | if (loops == 0) |
287 | dev_warn(&sdd->pdev->dev, "Timed out flushing RX FIFO\n"); | |
288 | ||
230d42d4 JB |
289 | val = readl(regs + S3C64XX_SPI_CH_CFG); |
290 | val &= ~S3C64XX_SPI_CH_SW_RST; | |
291 | writel(val, regs + S3C64XX_SPI_CH_CFG); | |
292 | ||
293 | val = readl(regs + S3C64XX_SPI_MODE_CFG); | |
294 | val &= ~(S3C64XX_SPI_MODE_TXDMA_ON | S3C64XX_SPI_MODE_RXDMA_ON); | |
295 | writel(val, regs + S3C64XX_SPI_MODE_CFG); | |
230d42d4 JB |
296 | } |
297 | ||
82ab8cd7 | 298 | static void s3c64xx_spi_dmacb(void *data) |
39d3e807 | 299 | { |
82ab8cd7 BK |
300 | struct s3c64xx_spi_driver_data *sdd; |
301 | struct s3c64xx_spi_dma_data *dma = data; | |
39d3e807 BK |
302 | unsigned long flags; |
303 | ||
054ebcc4 | 304 | if (dma->direction == DMA_DEV_TO_MEM) |
82ab8cd7 BK |
305 | sdd = container_of(data, |
306 | struct s3c64xx_spi_driver_data, rx_dma); | |
307 | else | |
308 | sdd = container_of(data, | |
309 | struct s3c64xx_spi_driver_data, tx_dma); | |
310 | ||
39d3e807 BK |
311 | spin_lock_irqsave(&sdd->lock, flags); |
312 | ||
054ebcc4 | 313 | if (dma->direction == DMA_DEV_TO_MEM) { |
82ab8cd7 BK |
314 | sdd->state &= ~RXBUSY; |
315 | if (!(sdd->state & TXBUSY)) | |
316 | complete(&sdd->xfer_completion); | |
317 | } else { | |
318 | sdd->state &= ~TXBUSY; | |
319 | if (!(sdd->state & RXBUSY)) | |
320 | complete(&sdd->xfer_completion); | |
321 | } | |
39d3e807 BK |
322 | |
323 | spin_unlock_irqrestore(&sdd->lock, flags); | |
324 | } | |
325 | ||
1cac41cb MB |
326 | /* FIXME: remove this section once arch/arm/mach-s3c64xx uses dmaengine */ |
327 | ||
328 | static struct s3c2410_dma_client s3c64xx_spi_dma_client = { | |
329 | .name = "samsung-spi-dma", | |
330 | }; | |
331 | ||
78843727 | 332 | static void prepare_dma(struct s3c64xx_spi_dma_data *dma, |
1cac41cb | 333 | unsigned len, dma_addr_t buf) |
78843727 AB |
334 | { |
335 | struct s3c64xx_spi_driver_data *sdd; | |
1cac41cb MB |
336 | struct samsung_dma_prep info; |
337 | struct samsung_dma_config config; | |
338 | u32 modecfg; | |
b1a8e78d | 339 | |
78843727 AB |
340 | if (dma->direction == DMA_DEV_TO_MEM) { |
341 | sdd = container_of((void *)dma, | |
342 | struct s3c64xx_spi_driver_data, rx_dma); | |
1cac41cb MB |
343 | config.direction = sdd->rx_dma.direction; |
344 | config.fifo = sdd->sfr_start + S3C64XX_SPI_RX_DATA; | |
345 | config.width = sdd->cur_bpw / 8; | |
346 | modecfg = readl(sdd->regs + S3C64XX_SPI_MODE_CFG); | |
347 | config.maxburst = modecfg & S3C64XX_SPI_MODE_4BURST ? | |
348 | S3C64XX_SPI_DMA_4BURST_LEN : | |
349 | S3C64XX_SPI_DMA_1BURST_LEN; | |
350 | ||
351 | #ifdef CONFIG_ARM64 | |
352 | sdd->ops->config((unsigned long)sdd->rx_dma.ch, &config); | |
353 | #else | |
354 | sdd->ops->config((enum dma_ch)sdd->rx_dma.ch, &config); | |
355 | #endif | |
78843727 AB |
356 | } else { |
357 | sdd = container_of((void *)dma, | |
358 | struct s3c64xx_spi_driver_data, tx_dma); | |
1cac41cb MB |
359 | config.direction = sdd->tx_dma.direction; |
360 | config.fifo = sdd->sfr_start + S3C64XX_SPI_TX_DATA; | |
361 | config.width = sdd->cur_bpw / 8; | |
362 | modecfg = readl(sdd->regs + S3C64XX_SPI_MODE_CFG); | |
363 | config.maxburst = modecfg & S3C64XX_SPI_MODE_4BURST ? | |
364 | S3C64XX_SPI_DMA_4BURST_LEN : | |
365 | S3C64XX_SPI_DMA_1BURST_LEN; | |
366 | ||
367 | #ifdef CONFIG_ARM64 | |
368 | sdd->ops->config((unsigned long)sdd->tx_dma.ch, &config); | |
369 | #else | |
370 | sdd->ops->config((enum dma_ch)sdd->tx_dma.ch, &config); | |
371 | #endif | |
78843727 AB |
372 | } |
373 | ||
1cac41cb MB |
374 | info.cap = DMA_SLAVE; |
375 | info.len = len; | |
376 | info.fp = s3c64xx_spi_dmacb; | |
377 | info.fp_param = dma; | |
378 | info.direction = dma->direction; | |
379 | info.buf = buf; | |
380 | ||
381 | #ifdef CONFIG_ARM64 | |
382 | sdd->ops->prepare((unsigned long)dma->ch, &info); | |
383 | sdd->ops->trigger((unsigned long)dma->ch); | |
384 | #else | |
385 | sdd->ops->prepare((enum dma_ch)dma->ch, &info); | |
386 | sdd->ops->trigger((enum dma_ch)dma->ch); | |
387 | #endif | |
388 | ||
389 | } | |
390 | ||
391 | static int acquire_dma(struct s3c64xx_spi_driver_data *sdd) | |
392 | { | |
393 | struct samsung_dma_req req; | |
394 | struct device *dev = &sdd->pdev->dev; | |
395 | ||
396 | sdd->ops = samsung_dma_get_ops(); | |
397 | ||
398 | req.cap = DMA_SLAVE; | |
399 | req.client = &s3c64xx_spi_dma_client; | |
78843727 | 400 | |
1cac41cb MB |
401 | if (sdd->rx_dma.ch == NULL) |
402 | sdd->rx_dma.ch = (void *)sdd->ops->request(sdd->rx_dma.dmach, | |
403 | &req, dev, "rx"); | |
404 | if (sdd->tx_dma.ch == NULL) | |
405 | sdd->tx_dma.ch = (void *)sdd->ops->request(sdd->tx_dma.dmach, | |
406 | &req, dev, "tx"); | |
78843727 | 407 | |
1cac41cb | 408 | return 1; |
78843727 AB |
409 | } |
410 | ||
1cac41cb MB |
411 | static void s3c64xx_spi_hwinit(struct s3c64xx_spi_driver_data *sdd, int channel); |
412 | ||
78843727 AB |
413 | static int s3c64xx_spi_prepare_transfer(struct spi_master *spi) |
414 | { | |
415 | struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(spi); | |
1cac41cb MB |
416 | struct s3c64xx_spi_info *sci = sdd->cntrlr_info; |
417 | #ifdef CONFIG_PM | |
fb9d044e | 418 | int ret; |
1cac41cb | 419 | #endif |
78843727 | 420 | |
1cac41cb MB |
421 | #ifndef CONFIG_PM |
422 | if (sci->dma_mode == DMA_MODE) { | |
c12f9643 | 423 | /* Acquire DMA channels */ |
1cac41cb MB |
424 | while (!acquire_dma(sdd)) |
425 | usleep_range(10000, 11000); | |
fb9d044e | 426 | } |
1cac41cb | 427 | #endif |
fb9d044e | 428 | |
1cac41cb MB |
429 | #ifdef CONFIG_PM |
430 | ret = pm_runtime_get_sync(&sdd->pdev->dev); | |
431 | if(ret < 0) | |
432 | return ret; | |
433 | #endif | |
fb9d044e | 434 | |
1cac41cb MB |
435 | if (sci->need_hw_init) |
436 | s3c64xx_spi_hwinit(sdd, sdd->port_id); | |
437 | ||
438 | return 0; | |
78843727 AB |
439 | } |
440 | ||
441 | static int s3c64xx_spi_unprepare_transfer(struct spi_master *spi) | |
442 | { | |
443 | struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(spi); | |
1cac41cb MB |
444 | #ifdef CONFIG_PM |
445 | int ret; | |
446 | #endif | |
447 | ||
448 | #ifndef CONFIG_PM | |
449 | struct s3c64xx_spi_info *sci = sdd->cntrlr_info; | |
78843727 AB |
450 | |
451 | /* Free DMA channels */ | |
1cac41cb MB |
452 | if (sci->dma_mode == DMA_MODE) { |
453 | #ifdef CONFIG_ARM64 | |
454 | sdd->ops->release((unsigned long)sdd->rx_dma.ch, | |
455 | &s3c64xx_spi_dma_client); | |
456 | sdd->ops->release((unsigned long)sdd->tx_dma.ch, | |
457 | &s3c64xx_spi_dma_client); | |
458 | #else | |
459 | sdd->ops->release((enum dma_ch)sdd->rx_dma.ch, | |
460 | &s3c64xx_spi_dma_client); | |
461 | sdd->ops->release((enum dma_ch)sdd->tx_dma.ch, | |
462 | &s3c64xx_spi_dma_client); | |
463 | #endif | |
464 | sdd->rx_dma.ch = NULL; | |
465 | sdd->tx_dma.ch = NULL; | |
7e995556 | 466 | } |
1cac41cb MB |
467 | #endif |
468 | ||
469 | #ifdef CONFIG_PM | |
470 | pm_runtime_mark_last_busy(&sdd->pdev->dev); | |
471 | ret = pm_runtime_put_autosuspend(&sdd->pdev->dev); | |
472 | if(ret < 0) | |
473 | return ret; | |
474 | #endif | |
78843727 | 475 | |
78843727 AB |
476 | return 0; |
477 | } | |
478 | ||
1cac41cb MB |
479 | static void s3c64xx_spi_dma_stop(struct s3c64xx_spi_driver_data *sdd, |
480 | struct s3c64xx_spi_dma_data *dma) | |
3f295887 | 481 | { |
1cac41cb MB |
482 | #ifdef CONFIG_ARM64 |
483 | sdd->ops->stop((unsigned long)dma->ch); | |
484 | #else | |
485 | sdd->ops->stop((enum dma_ch)dma->ch); | |
486 | #endif | |
487 | } | |
3f295887 | 488 | |
1cac41cb MB |
489 | static void s3c64xx_dma_debug(struct s3c64xx_spi_driver_data *sdd, |
490 | struct s3c64xx_spi_dma_data *dma) | |
491 | { | |
492 | #ifdef CONFIG_ARM64 | |
493 | sdd->ops->debug((unsigned long)dma->ch); | |
494 | #else | |
495 | sdd->ops->debug((enum dma_ch)dma->ch); | |
496 | #endif | |
3f295887 MB |
497 | } |
498 | ||
230d42d4 JB |
499 | static void enable_datapath(struct s3c64xx_spi_driver_data *sdd, |
500 | struct spi_device *spi, | |
501 | struct spi_transfer *xfer, int dma_mode) | |
502 | { | |
230d42d4 | 503 | void __iomem *regs = sdd->regs; |
1cac41cb | 504 | u32 modecfg, chcfg, dma_burst_len; |
230d42d4 JB |
505 | |
506 | chcfg = readl(regs + S3C64XX_SPI_CH_CFG); | |
507 | chcfg &= ~S3C64XX_SPI_CH_TXCH_ON; | |
508 | ||
1cac41cb MB |
509 | modecfg = readl(regs + S3C64XX_SPI_MODE_CFG); |
510 | modecfg &= ~S3C64XX_SPI_MODE_4BURST; | |
511 | ||
230d42d4 JB |
512 | if (dma_mode) { |
513 | chcfg &= ~S3C64XX_SPI_CH_RXCH_ON; | |
1cac41cb MB |
514 | |
515 | dma_burst_len = (sdd->cur_bpw / 8) * S3C64XX_SPI_DMA_4BURST_LEN; | |
516 | if (!(xfer->len % dma_burst_len)) | |
517 | modecfg |= S3C64XX_SPI_MODE_4BURST; | |
230d42d4 JB |
518 | } else { |
519 | /* Always shift in data in FIFO, even if xfer is Tx only, | |
520 | * this helps setting PCKT_CNT value for generating clocks | |
521 | * as exactly needed. | |
522 | */ | |
523 | chcfg |= S3C64XX_SPI_CH_RXCH_ON; | |
524 | writel(((xfer->len * 8 / sdd->cur_bpw) & 0xffff) | |
525 | | S3C64XX_SPI_PACKET_CNT_EN, | |
526 | regs + S3C64XX_SPI_PACKET_CNT); | |
527 | } | |
528 | ||
1cac41cb MB |
529 | writel(modecfg, regs + S3C64XX_SPI_MODE_CFG); |
530 | modecfg = readl(regs + S3C64XX_SPI_MODE_CFG); | |
531 | modecfg &= ~(S3C64XX_SPI_MODE_TXDMA_ON | S3C64XX_SPI_MODE_RXDMA_ON); | |
532 | ||
230d42d4 JB |
533 | if (xfer->tx_buf != NULL) { |
534 | sdd->state |= TXBUSY; | |
535 | chcfg |= S3C64XX_SPI_CH_TXCH_ON; | |
536 | if (dma_mode) { | |
537 | modecfg |= S3C64XX_SPI_MODE_TXDMA_ON; | |
1cac41cb | 538 | prepare_dma(&sdd->tx_dma, xfer->len, xfer->tx_dma); |
230d42d4 | 539 | } else { |
0c92ecf1 JB |
540 | switch (sdd->cur_bpw) { |
541 | case 32: | |
542 | iowrite32_rep(regs + S3C64XX_SPI_TX_DATA, | |
543 | xfer->tx_buf, xfer->len / 4); | |
544 | break; | |
545 | case 16: | |
546 | iowrite16_rep(regs + S3C64XX_SPI_TX_DATA, | |
547 | xfer->tx_buf, xfer->len / 2); | |
548 | break; | |
549 | default: | |
550 | iowrite8_rep(regs + S3C64XX_SPI_TX_DATA, | |
551 | xfer->tx_buf, xfer->len); | |
552 | break; | |
553 | } | |
230d42d4 JB |
554 | } |
555 | } | |
556 | ||
557 | if (xfer->rx_buf != NULL) { | |
558 | sdd->state |= RXBUSY; | |
559 | ||
a5238e36 | 560 | if (sdd->port_conf->high_speed && sdd->cur_speed >= 30000000UL |
230d42d4 JB |
561 | && !(sdd->cur_mode & SPI_CPHA)) |
562 | chcfg |= S3C64XX_SPI_CH_HS_EN; | |
563 | ||
564 | if (dma_mode) { | |
565 | modecfg |= S3C64XX_SPI_MODE_RXDMA_ON; | |
566 | chcfg |= S3C64XX_SPI_CH_RXCH_ON; | |
567 | writel(((xfer->len * 8 / sdd->cur_bpw) & 0xffff) | |
568 | | S3C64XX_SPI_PACKET_CNT_EN, | |
569 | regs + S3C64XX_SPI_PACKET_CNT); | |
1cac41cb | 570 | prepare_dma(&sdd->rx_dma, xfer->len, xfer->rx_dma); |
230d42d4 JB |
571 | } |
572 | } | |
573 | ||
574 | writel(modecfg, regs + S3C64XX_SPI_MODE_CFG); | |
575 | writel(chcfg, regs + S3C64XX_SPI_CH_CFG); | |
576 | } | |
577 | ||
1cac41cb MB |
578 | static inline void enable_cs(struct s3c64xx_spi_driver_data *sdd, |
579 | struct spi_device *spi) | |
7e995556 | 580 | { |
1cac41cb | 581 | struct s3c64xx_spi_csinfo *cs; |
7e995556 | 582 | |
1cac41cb MB |
583 | if (sdd->tgl_spi != NULL) { /* If last device toggled after mssg */ |
584 | if (sdd->tgl_spi != spi) { /* if last mssg on diff device */ | |
585 | /* Deselect the last toggled device */ | |
586 | cs = sdd->tgl_spi->controller_data; | |
587 | if(cs->line != 0) | |
588 | gpio_set_value(cs->line, | |
589 | spi->mode & SPI_CS_HIGH ? 0 : 1); | |
590 | /* Quiese the signals */ | |
591 | writel(spi->mode & SPI_CS_HIGH ? | |
592 | 0 : S3C64XX_SPI_SLAVE_SIG_INACT, | |
593 | sdd->regs + S3C64XX_SPI_SLAVE_SEL); | |
594 | } | |
595 | sdd->tgl_spi = NULL; | |
596 | } | |
7e995556 | 597 | |
1cac41cb MB |
598 | cs = spi->controller_data; |
599 | if(cs->line != 0) | |
600 | gpio_set_value(cs->line, spi->mode & SPI_CS_HIGH ? 1 : 0); | |
7e995556 | 601 | |
1cac41cb MB |
602 | if (cs->cs_mode == AUTO_CS_MODE) { |
603 | /* Set auto chip selection */ | |
604 | writel(readl(sdd->regs + S3C64XX_SPI_SLAVE_SEL) | |
605 | | S3C64XX_SPI_SLAVE_AUTO | |
606 | | S3C64XX_SPI_SLAVE_NSC_CNT_2, | |
607 | sdd->regs + S3C64XX_SPI_SLAVE_SEL); | |
608 | } else { | |
609 | /* Start the signals */ | |
610 | writel(spi->mode & SPI_CS_HIGH ? | |
611 | S3C64XX_SPI_SLAVE_SIG_INACT : 0, | |
612 | sdd->regs + S3C64XX_SPI_SLAVE_SEL); | |
613 | } | |
230d42d4 JB |
614 | } |
615 | ||
1cac41cb MB |
616 | static int wait_for_xfer(struct s3c64xx_spi_driver_data *sdd, |
617 | struct spi_transfer *xfer, int dma_mode) | |
230d42d4 | 618 | { |
230d42d4 JB |
619 | void __iomem *regs = sdd->regs; |
620 | unsigned long val; | |
621 | int ms; | |
622 | ||
623 | /* millisecs to xfer 'len' bytes @ 'cur_speed' */ | |
624 | ms = xfer->len * 8 * 1000 / sdd->cur_speed; | |
1cac41cb MB |
625 | ms = (ms * 10) + 30; /* some tolerance */ |
626 | ms = max(ms, 100); /* minimum timeout */ | |
3700c6eb | 627 | |
1cac41cb MB |
628 | if (dma_mode) { |
629 | val = msecs_to_jiffies(ms) + 10; | |
630 | val = wait_for_completion_timeout(&sdd->xfer_completion, val); | |
631 | } else { | |
632 | u32 status; | |
633 | val = msecs_to_loops(ms); | |
634 | do { | |
635 | status = readl(regs + S3C64XX_SPI_STATUS); | |
636 | } while (RX_FIFO_LVL(status, sdd) < xfer->len && --val); | |
230d42d4 JB |
637 | } |
638 | ||
3700c6eb MB |
639 | if (!val) |
640 | return -EIO; | |
230d42d4 | 641 | |
1cac41cb MB |
642 | if (dma_mode) { |
643 | u32 status; | |
644 | ||
645 | /* | |
646 | * DmaTx returns after simply writing data in the FIFO, | |
647 | * w/o waiting for real transmission on the bus to finish. | |
648 | * DmaRx returns only after Dma read data from FIFO which | |
649 | * needs bus transmission to finish, so we don't worry if | |
650 | * Xfer involved Rx(with or without Tx). | |
651 | */ | |
652 | if (xfer->rx_buf == NULL) { | |
653 | val = msecs_to_loops(10); | |
654 | status = readl(regs + S3C64XX_SPI_STATUS); | |
655 | while ((TX_FIFO_LVL(status, sdd) | |
656 | || !S3C64XX_SPI_ST_TX_DONE(status, sdd)) | |
657 | && --val) { | |
658 | cpu_relax(); | |
659 | status = readl(regs + S3C64XX_SPI_STATUS); | |
660 | } | |
230d42d4 | 661 | |
1cac41cb MB |
662 | if (!val) |
663 | return -EIO; | |
664 | } | |
665 | } else { | |
666 | /* If it was only Tx */ | |
667 | if (xfer->rx_buf == NULL) { | |
668 | sdd->state &= ~TXBUSY; | |
669 | return 0; | |
670 | } | |
3700c6eb MB |
671 | |
672 | switch (sdd->cur_bpw) { | |
673 | case 32: | |
674 | ioread32_rep(regs + S3C64XX_SPI_RX_DATA, | |
1cac41cb | 675 | xfer->rx_buf, xfer->len / 4); |
3700c6eb MB |
676 | break; |
677 | case 16: | |
678 | ioread16_rep(regs + S3C64XX_SPI_RX_DATA, | |
1cac41cb | 679 | xfer->rx_buf, xfer->len / 2); |
3700c6eb MB |
680 | break; |
681 | default: | |
682 | ioread8_rep(regs + S3C64XX_SPI_RX_DATA, | |
1cac41cb | 683 | xfer->rx_buf, xfer->len); |
3700c6eb MB |
684 | break; |
685 | } | |
1cac41cb MB |
686 | sdd->state &= ~RXBUSY; |
687 | } | |
3700c6eb | 688 | |
230d42d4 JB |
689 | return 0; |
690 | } | |
691 | ||
1cac41cb MB |
692 | static inline void disable_cs(struct s3c64xx_spi_driver_data *sdd, |
693 | struct spi_device *spi) | |
694 | { | |
695 | struct s3c64xx_spi_csinfo *cs = spi->controller_data; | |
696 | ||
697 | if (sdd->tgl_spi == spi) | |
698 | sdd->tgl_spi = NULL; | |
699 | ||
700 | if(cs->line != 0) | |
701 | gpio_set_value(cs->line, spi->mode & SPI_CS_HIGH ? 0 : 1); | |
702 | ||
703 | if (cs->cs_mode != AUTO_CS_MODE) { | |
704 | /* Quiese the signals */ | |
705 | writel(spi->mode & SPI_CS_HIGH | |
706 | ? 0 : S3C64XX_SPI_SLAVE_SIG_INACT, | |
707 | sdd->regs + S3C64XX_SPI_SLAVE_SEL); | |
708 | } | |
709 | } | |
710 | ||
230d42d4 JB |
711 | static void s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd) |
712 | { | |
1cac41cb | 713 | struct s3c64xx_spi_info *sci = sdd->cntrlr_info; |
230d42d4 JB |
714 | void __iomem *regs = sdd->regs; |
715 | u32 val; | |
716 | ||
717 | /* Disable Clock */ | |
a5238e36 | 718 | if (sdd->port_conf->clk_from_cmu) { |
9f667bff | 719 | clk_disable_unprepare(sdd->src_clk); |
b42a81ca JB |
720 | } else { |
721 | val = readl(regs + S3C64XX_SPI_CLK_CFG); | |
722 | val &= ~S3C64XX_SPI_ENCLK_ENABLE; | |
723 | writel(val, regs + S3C64XX_SPI_CLK_CFG); | |
724 | } | |
230d42d4 JB |
725 | |
726 | /* Set Polarity and Phase */ | |
727 | val = readl(regs + S3C64XX_SPI_CH_CFG); | |
728 | val &= ~(S3C64XX_SPI_CH_SLAVE | | |
729 | S3C64XX_SPI_CPOL_L | | |
730 | S3C64XX_SPI_CPHA_B); | |
731 | ||
732 | if (sdd->cur_mode & SPI_CPOL) | |
733 | val |= S3C64XX_SPI_CPOL_L; | |
734 | ||
735 | if (sdd->cur_mode & SPI_CPHA) | |
736 | val |= S3C64XX_SPI_CPHA_B; | |
737 | ||
738 | writel(val, regs + S3C64XX_SPI_CH_CFG); | |
739 | ||
740 | /* Set Channel & DMA Mode */ | |
741 | val = readl(regs + S3C64XX_SPI_MODE_CFG); | |
742 | val &= ~(S3C64XX_SPI_MODE_BUS_TSZ_MASK | |
743 | | S3C64XX_SPI_MODE_CH_TSZ_MASK); | |
744 | ||
745 | switch (sdd->cur_bpw) { | |
746 | case 32: | |
747 | val |= S3C64XX_SPI_MODE_BUS_TSZ_WORD; | |
0c92ecf1 | 748 | val |= S3C64XX_SPI_MODE_CH_TSZ_WORD; |
1cac41cb MB |
749 | if (sci->swap_mode == SWAP_MODE) { |
750 | writel(S3C64XX_SPI_SWAP_TX_EN | | |
751 | S3C64XX_SPI_SWAP_TX_BYTE | | |
752 | S3C64XX_SPI_SWAP_TX_HALF_WORD | | |
753 | S3C64XX_SPI_SWAP_RX_EN | | |
754 | S3C64XX_SPI_SWAP_RX_BYTE | | |
755 | S3C64XX_SPI_SWAP_RX_HALF_WORD, | |
756 | regs + S3C64XX_SPI_SWAP_CFG); | |
757 | } | |
230d42d4 JB |
758 | break; |
759 | case 16: | |
760 | val |= S3C64XX_SPI_MODE_BUS_TSZ_HALFWORD; | |
0c92ecf1 | 761 | val |= S3C64XX_SPI_MODE_CH_TSZ_HALFWORD; |
1cac41cb MB |
762 | if (sci->swap_mode == SWAP_MODE) { |
763 | writel(S3C64XX_SPI_SWAP_TX_EN | | |
764 | S3C64XX_SPI_SWAP_TX_BYTE | | |
765 | S3C64XX_SPI_SWAP_RX_EN | | |
766 | S3C64XX_SPI_SWAP_RX_BYTE, | |
767 | regs + S3C64XX_SPI_SWAP_CFG); | |
768 | } | |
230d42d4 JB |
769 | break; |
770 | default: | |
771 | val |= S3C64XX_SPI_MODE_BUS_TSZ_BYTE; | |
0c92ecf1 | 772 | val |= S3C64XX_SPI_MODE_CH_TSZ_BYTE; |
1cac41cb MB |
773 | if (sci->swap_mode == SWAP_MODE) |
774 | writel(0, regs + S3C64XX_SPI_SWAP_CFG); | |
230d42d4 JB |
775 | break; |
776 | } | |
230d42d4 JB |
777 | |
778 | writel(val, regs + S3C64XX_SPI_MODE_CFG); | |
779 | ||
a5238e36 | 780 | if (sdd->port_conf->clk_from_cmu) { |
b42a81ca JB |
781 | /* Configure Clock */ |
782 | /* There is half-multiplier before the SPI */ | |
783 | clk_set_rate(sdd->src_clk, sdd->cur_speed * 2); | |
784 | /* Enable Clock */ | |
1cac41cb | 785 | exynos_update_ip_idle_status(sdd->idle_ip_index, 0); |
9f667bff | 786 | clk_prepare_enable(sdd->src_clk); |
b42a81ca JB |
787 | } else { |
788 | /* Configure Clock */ | |
789 | val = readl(regs + S3C64XX_SPI_CLK_CFG); | |
790 | val &= ~S3C64XX_SPI_PSR_MASK; | |
791 | val |= ((clk_get_rate(sdd->src_clk) / sdd->cur_speed / 2 - 1) | |
792 | & S3C64XX_SPI_PSR_MASK); | |
793 | writel(val, regs + S3C64XX_SPI_CLK_CFG); | |
794 | ||
795 | /* Enable Clock */ | |
796 | val = readl(regs + S3C64XX_SPI_CLK_CFG); | |
797 | val |= S3C64XX_SPI_ENCLK_ENABLE; | |
798 | writel(val, regs + S3C64XX_SPI_CLK_CFG); | |
799 | } | |
1cac41cb MB |
800 | |
801 | if (sci->dbg_mode & SPI_DBG_MODE) { | |
802 | dev_err(&sdd->pdev->dev, "SPI_MODE_%d", sdd->cur_mode & 0x3); | |
803 | dev_err(&sdd->pdev->dev, "BTS : %d", sdd->cur_bpw); | |
804 | } | |
230d42d4 JB |
805 | } |
806 | ||
1cac41cb | 807 | #define XFER_DMAADDR_INVALID DMA_BIT_MASK(36) |
230d42d4 | 808 | |
1cac41cb MB |
809 | static int s3c64xx_spi_map_mssg(struct s3c64xx_spi_driver_data *sdd, |
810 | struct spi_message *msg) | |
811 | { | |
812 | struct s3c64xx_spi_info *sci = sdd->cntrlr_info; | |
813 | struct device *dev = &sdd->pdev->dev; | |
814 | struct spi_transfer *xfer; | |
815 | ||
816 | if ((msg->is_dma_mapped) || (sci->dma_mode != DMA_MODE)) | |
817 | return 0; | |
818 | ||
819 | /* First mark all xfer unmapped */ | |
820 | list_for_each_entry(xfer, &msg->transfers, transfer_list) { | |
821 | xfer->rx_dma = XFER_DMAADDR_INVALID; | |
822 | xfer->tx_dma = XFER_DMAADDR_INVALID; | |
823 | } | |
824 | ||
825 | /* Map until end or first fail */ | |
826 | list_for_each_entry(xfer, &msg->transfers, transfer_list) { | |
827 | ||
828 | if (xfer->len <= ((FIFO_LVL_MASK(sdd) >> 1) + 1)) | |
829 | continue; | |
830 | ||
831 | if (xfer->tx_buf != NULL) { | |
832 | xfer->tx_dma = dma_map_single(dev, | |
833 | (void *)xfer->tx_buf, xfer->len, | |
834 | DMA_TO_DEVICE); | |
835 | if (dma_mapping_error(dev, xfer->tx_dma)) { | |
836 | dev_err(dev, "dma_map_single Tx failed\n"); | |
837 | xfer->tx_dma = XFER_DMAADDR_INVALID; | |
838 | return -ENOMEM; | |
839 | } | |
840 | } | |
841 | ||
842 | if (xfer->rx_buf != NULL) { | |
843 | xfer->rx_dma = dma_map_single(dev, xfer->rx_buf, | |
844 | xfer->len, DMA_FROM_DEVICE); | |
845 | if (dma_mapping_error(dev, xfer->rx_dma)) { | |
846 | dev_err(dev, "dma_map_single Rx failed\n"); | |
847 | dma_unmap_single(dev, xfer->tx_dma, | |
848 | xfer->len, DMA_TO_DEVICE); | |
849 | xfer->tx_dma = XFER_DMAADDR_INVALID; | |
850 | xfer->rx_dma = XFER_DMAADDR_INVALID; | |
851 | return -ENOMEM; | |
852 | } | |
853 | } | |
854 | } | |
855 | ||
856 | return 0; | |
857 | } | |
858 | ||
859 | static void s3c64xx_spi_unmap_mssg(struct s3c64xx_spi_driver_data *sdd, | |
860 | struct spi_message *msg) | |
861 | { | |
862 | struct s3c64xx_spi_info *sci = sdd->cntrlr_info; | |
863 | struct device *dev = &sdd->pdev->dev; | |
864 | struct spi_transfer *xfer; | |
865 | ||
866 | if ((msg->is_dma_mapped) || (sci->dma_mode != DMA_MODE)) | |
867 | return; | |
868 | ||
869 | list_for_each_entry(xfer, &msg->transfers, transfer_list) { | |
870 | ||
871 | if (xfer->len <= ((FIFO_LVL_MASK(sdd) >> 1) + 1)) | |
872 | continue; | |
873 | ||
874 | if (xfer->rx_buf != NULL | |
875 | && xfer->rx_dma != XFER_DMAADDR_INVALID) | |
876 | dma_unmap_single(dev, xfer->rx_dma, | |
877 | xfer->len, DMA_FROM_DEVICE); | |
878 | ||
879 | if (xfer->tx_buf != NULL | |
880 | && xfer->tx_dma != XFER_DMAADDR_INVALID) | |
881 | dma_unmap_single(dev, xfer->tx_dma, | |
882 | xfer->len, DMA_TO_DEVICE); | |
883 | } | |
884 | } | |
885 | ||
886 | static int s3c64xx_spi_transfer_one_message(struct spi_master *master, | |
887 | struct spi_message *msg) | |
230d42d4 | 888 | { |
ad2a99af | 889 | struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master); |
1cac41cb | 890 | struct s3c64xx_spi_info *sci = sdd->cntrlr_info; |
230d42d4 JB |
891 | struct spi_device *spi = msg->spi; |
892 | struct s3c64xx_spi_csinfo *cs = spi->controller_data; | |
1cac41cb MB |
893 | struct spi_transfer *xfer; |
894 | int status = 0, cs_toggle = 0; | |
895 | const void *origin_tx_buf = NULL; | |
896 | void *origin_rx_buf = NULL; | |
897 | unsigned target_len = 0, origin_len = 0; | |
898 | unsigned fifo_lvl = (FIFO_LVL_MASK(sdd) >> 1) + 1; | |
899 | u32 speed; | |
900 | u8 bpw; | |
230d42d4 JB |
901 | |
902 | /* If Master's(controller) state differs from that needed by Slave */ | |
903 | if (sdd->cur_speed != spi->max_speed_hz | |
904 | || sdd->cur_mode != spi->mode | |
905 | || sdd->cur_bpw != spi->bits_per_word) { | |
906 | sdd->cur_bpw = spi->bits_per_word; | |
907 | sdd->cur_speed = spi->max_speed_hz; | |
908 | sdd->cur_mode = spi->mode; | |
909 | s3c64xx_spi_config(sdd); | |
910 | } | |
911 | ||
1cac41cb MB |
912 | /* Map all the transfers if needed */ |
913 | if (s3c64xx_spi_map_mssg(sdd, msg)) { | |
914 | dev_err(&spi->dev, | |
915 | "Xfer: Unable to map message buffers!\n"); | |
916 | status = -ENOMEM; | |
917 | goto out; | |
918 | } | |
919 | ||
230d42d4 JB |
920 | /* Configure feedback delay */ |
921 | writel(cs->fb_delay & 0x3, sdd->regs + S3C64XX_SPI_FB_CLK); | |
922 | ||
1cac41cb | 923 | list_for_each_entry(xfer, &msg->transfers, transfer_list) { |
0c92ecf1 | 924 | |
1cac41cb MB |
925 | unsigned long flags; |
926 | int use_dma; | |
230d42d4 | 927 | |
1cac41cb | 928 | reinit_completion(&sdd->xfer_completion); |
230d42d4 | 929 | |
1cac41cb MB |
930 | /* Only BPW and Speed may change across transfers */ |
931 | bpw = xfer->bits_per_word; | |
932 | speed = xfer->speed_hz ? : spi->max_speed_hz; | |
230d42d4 | 933 | |
1cac41cb MB |
934 | if (xfer->len % (bpw / 8)) { |
935 | dev_err(&spi->dev, | |
936 | "Xfer length(%u) not a multiple of word size(%u)\n", | |
937 | xfer->len, bpw / 8); | |
938 | status = -EIO; | |
939 | goto out; | |
940 | } | |
941 | ||
942 | if (bpw != sdd->cur_bpw || speed != sdd->cur_speed) { | |
943 | sdd->cur_bpw = bpw; | |
944 | sdd->cur_speed = speed; | |
945 | s3c64xx_spi_config(sdd); | |
946 | } | |
230d42d4 | 947 | |
1cac41cb MB |
948 | /* verify cpu mode */ |
949 | if (sci->dma_mode != DMA_MODE) { | |
950 | use_dma = 0; | |
230d42d4 | 951 | |
1cac41cb MB |
952 | /* backup original tx, rx buf ptr & xfer length */ |
953 | origin_tx_buf = xfer->tx_buf; | |
954 | origin_rx_buf = xfer->rx_buf; | |
955 | origin_len = xfer->len; | |
230d42d4 | 956 | |
1cac41cb MB |
957 | target_len = xfer->len; |
958 | if (xfer->len > fifo_lvl) | |
959 | xfer->len = fifo_lvl; | |
960 | } else { | |
961 | /* Polling method for xfers not bigger than FIFO capacity */ | |
962 | if (xfer->len <= fifo_lvl) { | |
963 | use_dma = 0; | |
964 | } else { | |
965 | use_dma = 1; | |
966 | } | |
967 | } | |
968 | try_transfer: | |
969 | spin_lock_irqsave(&sdd->lock, flags); | |
230d42d4 | 970 | |
1cac41cb MB |
971 | /* Pending only which is to be done */ |
972 | sdd->state &= ~RXBUSY; | |
973 | sdd->state &= ~TXBUSY; | |
230d42d4 | 974 | |
1cac41cb MB |
975 | if (cs->cs_mode == AUTO_CS_MODE) { |
976 | /* Slave Select */ | |
977 | enable_cs(sdd, spi); | |
230d42d4 | 978 | |
1cac41cb MB |
979 | enable_datapath(sdd, spi, xfer, use_dma); |
980 | } else { | |
981 | enable_datapath(sdd, spi, xfer, use_dma); | |
230d42d4 | 982 | |
1cac41cb MB |
983 | /* Slave Select */ |
984 | enable_cs(sdd, spi); | |
230d42d4 | 985 | } |
1cac41cb MB |
986 | |
987 | spin_unlock_irqrestore(&sdd->lock, flags); | |
988 | ||
989 | status = wait_for_xfer(sdd, xfer, use_dma); | |
990 | ||
991 | if (status) { | |
992 | dev_err(&spi->dev, "I/O Error: rx-%d tx-%d res:rx-%c tx-%c len-%d\n", | |
993 | xfer->rx_buf ? 1 : 0, xfer->tx_buf ? 1 : 0, | |
994 | (sdd->state & RXBUSY) ? 'f' : 'p', | |
995 | (sdd->state & TXBUSY) ? 'f' : 'p', | |
996 | xfer->len); | |
997 | ||
998 | if (use_dma) { | |
999 | if (xfer->tx_buf != NULL | |
1000 | && (sdd->state & TXBUSY)) { | |
1001 | s3c64xx_dma_debug(sdd, &sdd->tx_dma); | |
1002 | s3c64xx_spi_dma_stop(sdd, &sdd->tx_dma); | |
1003 | } | |
1004 | if (xfer->rx_buf != NULL | |
1005 | && (sdd->state & RXBUSY)) { | |
1006 | s3c64xx_dma_debug(sdd, &sdd->rx_dma); | |
1007 | s3c64xx_spi_dma_stop(sdd, &sdd->rx_dma); | |
1008 | } | |
1009 | } | |
1010 | ||
1011 | s3c64xx_spi_dump_reg(sdd); | |
1012 | flush_fifo(sdd); | |
1013 | ||
1014 | goto out; | |
1015 | } | |
1016 | ||
1017 | if (xfer->delay_usecs) | |
1018 | udelay(xfer->delay_usecs); | |
1019 | ||
1020 | if (xfer->cs_change) { | |
1021 | /* Hint that the next mssg is gonna be | |
1022 | for the same device */ | |
1023 | if (list_is_last(&xfer->transfer_list, | |
1024 | &msg->transfers)) | |
1025 | cs_toggle = 1; | |
1026 | } | |
1027 | ||
1028 | msg->actual_length += xfer->len; | |
1029 | ||
230d42d4 | 1030 | flush_fifo(sdd); |
1cac41cb MB |
1031 | |
1032 | if (sci->dma_mode != DMA_MODE) { | |
1033 | target_len -= xfer->len; | |
1034 | ||
1035 | if (xfer->tx_buf != NULL) | |
1036 | xfer->tx_buf += xfer->len; | |
1037 | ||
1038 | if (xfer->rx_buf != NULL) | |
1039 | xfer->rx_buf += xfer->len; | |
1040 | ||
1041 | if (target_len > 0) { | |
1042 | if (target_len > fifo_lvl) | |
1043 | xfer->len = fifo_lvl; | |
1044 | else | |
1045 | xfer->len = target_len; | |
1046 | goto try_transfer; | |
1047 | } | |
1048 | ||
1049 | /* restore original tx, rx buf_ptr & xfer length */ | |
1050 | xfer->tx_buf = origin_tx_buf; | |
1051 | xfer->rx_buf = origin_rx_buf; | |
1052 | xfer->len = origin_len; | |
1053 | } | |
230d42d4 JB |
1054 | } |
1055 | ||
1cac41cb MB |
1056 | out: |
1057 | if (!cs_toggle || status) | |
1058 | disable_cs(sdd, spi); | |
1059 | else | |
1060 | sdd->tgl_spi = spi; | |
1061 | ||
1062 | s3c64xx_spi_unmap_mssg(sdd, msg); | |
1063 | ||
1064 | msg->status = status; | |
1065 | ||
1066 | spi_finalize_current_message(master); | |
1067 | ||
1068 | return 0; | |
230d42d4 | 1069 | } |
230d42d4 | 1070 | |
2b908075 | 1071 | static struct s3c64xx_spi_csinfo *s3c64xx_get_slave_ctrldata( |
2b908075 TA |
1072 | struct spi_device *spi) |
1073 | { | |
1074 | struct s3c64xx_spi_csinfo *cs; | |
4732cc63 | 1075 | struct device_node *slave_np, *data_np = NULL; |
2b908075 | 1076 | u32 fb_delay = 0; |
1cac41cb | 1077 | u32 cs_mode = 0; |
2b908075 TA |
1078 | |
1079 | slave_np = spi->dev.of_node; | |
1080 | if (!slave_np) { | |
1081 | dev_err(&spi->dev, "device node not found\n"); | |
1082 | return ERR_PTR(-EINVAL); | |
1083 | } | |
1084 | ||
06455bbc | 1085 | data_np = of_get_child_by_name(slave_np, "controller-data"); |
2b908075 TA |
1086 | if (!data_np) { |
1087 | dev_err(&spi->dev, "child node 'controller-data' not found\n"); | |
1088 | return ERR_PTR(-EINVAL); | |
1089 | } | |
1090 | ||
1091 | cs = kzalloc(sizeof(*cs), GFP_KERNEL); | |
1092 | if (!cs) { | |
1cac41cb | 1093 | dev_err(&spi->dev, "could not allocate memory for controller data\n"); |
06455bbc | 1094 | of_node_put(data_np); |
2b908075 TA |
1095 | return ERR_PTR(-ENOMEM); |
1096 | } | |
1097 | ||
1cac41cb MB |
1098 | if (of_get_property(data_np, "cs-gpio", NULL)) { |
1099 | cs->line = of_get_named_gpio(data_np, "cs-gpio", 0); | |
1100 | if (!gpio_is_valid(cs->line)) | |
1101 | cs->line = 0; | |
1102 | } else { | |
1103 | cs->line = 0; | |
1104 | } | |
1105 | ||
2b908075 TA |
1106 | of_property_read_u32(data_np, "samsung,spi-feedback-delay", &fb_delay); |
1107 | cs->fb_delay = fb_delay; | |
1cac41cb MB |
1108 | |
1109 | if (of_property_read_u32(data_np, | |
1110 | "samsung,spi-chip-select-mode", &cs_mode)) { | |
1111 | cs->cs_mode = AUTO_CS_MODE; | |
1112 | } else { | |
1113 | if (cs_mode) | |
1114 | cs->cs_mode = AUTO_CS_MODE; | |
1115 | else | |
1116 | cs->cs_mode = MANUAL_CS_MODE; | |
1117 | } | |
1118 | ||
06455bbc | 1119 | of_node_put(data_np); |
2b908075 TA |
1120 | return cs; |
1121 | } | |
1122 | ||
230d42d4 JB |
1123 | /* |
1124 | * Here we only check the validity of requested configuration | |
1125 | * and save the configuration in a local data-structure. | |
1126 | * The controller is actually configured only just before we | |
1127 | * get a message to transfer. | |
1128 | */ | |
1129 | static int s3c64xx_spi_setup(struct spi_device *spi) | |
1130 | { | |
1131 | struct s3c64xx_spi_csinfo *cs = spi->controller_data; | |
1132 | struct s3c64xx_spi_driver_data *sdd; | |
ad7de729 | 1133 | struct s3c64xx_spi_info *sci; |
1cac41cb MB |
1134 | struct spi_message *msg; |
1135 | unsigned long flags; | |
2b908075 | 1136 | int err; |
230d42d4 | 1137 | |
2b908075 | 1138 | sdd = spi_master_get_devdata(spi->master); |
1cac41cb | 1139 | if (!cs && spi->dev.of_node) { |
5c725b34 | 1140 | cs = s3c64xx_get_slave_ctrldata(spi); |
2b908075 TA |
1141 | spi->controller_data = cs; |
1142 | } | |
1143 | ||
1144 | if (IS_ERR_OR_NULL(cs)) { | |
230d42d4 JB |
1145 | dev_err(&spi->dev, "No CS for SPI(%d)\n", spi->chip_select); |
1146 | return -ENODEV; | |
1147 | } | |
1cac41cb MB |
1148 | #ifdef ENABLE_SENSORS_FPRINT_SECURE |
1149 | if (sdd->port_id == CONFIG_SENSORS_FP_SPI_NUMBER) | |
1150 | return 0; | |
1151 | #endif | |
1152 | #ifdef CONFIG_ESE_SECURE | |
1153 | if (sdd->port_id == CONFIG_ESE_SECURE_SPI_PORT) { | |
1154 | dev_err(&spi->dev, "%s.....(%d)\n",__func__, sdd->port_id); | |
1155 | return 0; | |
1156 | } | |
1157 | #endif | |
230d42d4 | 1158 | |
0149871c | 1159 | if (!spi_get_ctldata(spi)) { |
1cac41cb MB |
1160 | if(cs->line != 0) { |
1161 | err = gpio_request_one(cs->line, GPIOF_OUT_INIT_HIGH, | |
306972ce NKC |
1162 | dev_name(&spi->dev)); |
1163 | if (err) { | |
1164 | dev_err(&spi->dev, | |
1165 | "Failed to get /CS gpio [%d]: %d\n", | |
1cac41cb | 1166 | cs->line, err); |
306972ce NKC |
1167 | goto err_gpio_req; |
1168 | } | |
1c20c200 | 1169 | } |
1c20c200 | 1170 | |
3146beec | 1171 | spi_set_ctldata(spi, cs); |
230d42d4 JB |
1172 | } |
1173 | ||
230d42d4 | 1174 | sci = sdd->cntrlr_info; |
230d42d4 | 1175 | |
1cac41cb MB |
1176 | spin_lock_irqsave(&sdd->lock, flags); |
1177 | ||
1178 | list_for_each_entry(msg, &sdd->queue, queue) { | |
1179 | /* Is some mssg is already queued for this device */ | |
1180 | if (msg->spi == spi) { | |
1181 | dev_err(&spi->dev, | |
1182 | "setup: attempt while mssg in queue!\n"); | |
1183 | spin_unlock_irqrestore(&sdd->lock, flags); | |
1184 | err = -EBUSY; | |
1185 | goto err_msgq; | |
1186 | } | |
1187 | } | |
1188 | ||
1189 | spin_unlock_irqrestore(&sdd->lock, flags); | |
1190 | ||
1191 | if (spi->bits_per_word != 8 | |
1192 | && spi->bits_per_word != 16 | |
1193 | && spi->bits_per_word != 32) { | |
1194 | dev_err(&spi->dev, "setup: %dbits/wrd not supported!\n", | |
1195 | spi->bits_per_word); | |
1196 | err = -EINVAL; | |
1197 | goto setup_exit; | |
1198 | } | |
1199 | ||
1200 | #ifdef CONFIG_PM | |
b97b6621 | 1201 | pm_runtime_get_sync(&sdd->pdev->dev); |
1cac41cb | 1202 | #endif |
b97b6621 | 1203 | |
230d42d4 | 1204 | /* Check if we can provide the requested rate */ |
a5238e36 | 1205 | if (!sdd->port_conf->clk_from_cmu) { |
b42a81ca JB |
1206 | u32 psr, speed; |
1207 | ||
1208 | /* Max possible */ | |
1cac41cb MB |
1209 | speed = (unsigned int)clk_get_rate(sdd->src_clk) / 2 / (0 + 1); |
1210 | if (!speed) { | |
1211 | dev_err(&spi->dev, "clock rate of speed is 0\n"); | |
1212 | err = -EINVAL; | |
1213 | goto setup_exit; | |
1214 | } | |
b42a81ca JB |
1215 | |
1216 | if (spi->max_speed_hz > speed) | |
1217 | spi->max_speed_hz = speed; | |
1218 | ||
1cac41cb | 1219 | psr = (unsigned int)clk_get_rate(sdd->src_clk) / 2 / spi->max_speed_hz - 1; |
b42a81ca JB |
1220 | psr &= S3C64XX_SPI_PSR_MASK; |
1221 | if (psr == S3C64XX_SPI_PSR_MASK) | |
1222 | psr--; | |
1223 | ||
1cac41cb | 1224 | speed = (unsigned int)clk_get_rate(sdd->src_clk) / 2 / (psr + 1); |
b42a81ca JB |
1225 | if (spi->max_speed_hz < speed) { |
1226 | if (psr+1 < S3C64XX_SPI_PSR_MASK) { | |
1227 | psr++; | |
1228 | } else { | |
1229 | err = -EINVAL; | |
1230 | goto setup_exit; | |
1231 | } | |
1232 | } | |
230d42d4 | 1233 | |
1cac41cb | 1234 | speed = (unsigned int)clk_get_rate(sdd->src_clk) / 2 / (psr + 1); |
2b908075 | 1235 | if (spi->max_speed_hz >= speed) { |
b42a81ca | 1236 | spi->max_speed_hz = speed; |
2b908075 | 1237 | } else { |
e1b0f0df MB |
1238 | dev_err(&spi->dev, "Can't set %dHz transfer speed\n", |
1239 | spi->max_speed_hz); | |
230d42d4 | 1240 | err = -EINVAL; |
2b908075 TA |
1241 | goto setup_exit; |
1242 | } | |
230d42d4 JB |
1243 | } |
1244 | ||
1cac41cb MB |
1245 | disable_cs(sdd, spi); |
1246 | ||
1247 | #ifdef CONFIG_PM | |
483867ee HK |
1248 | pm_runtime_mark_last_busy(&sdd->pdev->dev); |
1249 | pm_runtime_put_autosuspend(&sdd->pdev->dev); | |
1cac41cb MB |
1250 | #endif |
1251 | ||
1252 | if (sci->dbg_mode & SPI_DBG_MODE) { | |
1253 | dev_err(&spi->dev, "SPI feedback-delay : %d\n", cs->fb_delay); | |
1254 | dev_err(&spi->dev, "SPI clock : %u(%lu)\n", | |
1255 | sdd->cur_speed, clk_get_rate(sdd->src_clk)); | |
1256 | dev_err(&spi->dev, "SPI %s CS mode", cs->cs_mode ? "AUTO" : "MANUAL"); | |
1257 | } | |
1258 | ||
2b908075 | 1259 | return 0; |
b97b6621 | 1260 | |
230d42d4 | 1261 | setup_exit: |
230d42d4 | 1262 | /* setup() returns with device de-selected */ |
1cac41cb | 1263 | disable_cs(sdd, spi); |
230d42d4 | 1264 | |
1cac41cb MB |
1265 | err_msgq: |
1266 | gpio_free(cs->line); | |
2b908075 TA |
1267 | spi_set_ctldata(spi, NULL); |
1268 | ||
1269 | err_gpio_req: | |
5bee3b94 SN |
1270 | if (spi->dev.of_node) |
1271 | kfree(cs); | |
2b908075 | 1272 | |
230d42d4 JB |
1273 | return err; |
1274 | } | |
1275 | ||
1c20c200 TA |
1276 | static void s3c64xx_spi_cleanup(struct spi_device *spi) |
1277 | { | |
1278 | struct s3c64xx_spi_csinfo *cs = spi_get_ctldata(spi); | |
1279 | ||
1cac41cb MB |
1280 | if (cs) { |
1281 | gpio_free(cs->line); | |
2b908075 TA |
1282 | if (spi->dev.of_node) |
1283 | kfree(cs); | |
1284 | } | |
1c20c200 TA |
1285 | spi_set_ctldata(spi, NULL); |
1286 | } | |
1287 | ||
c2573128 MB |
1288 | static irqreturn_t s3c64xx_spi_irq(int irq, void *data) |
1289 | { | |
1290 | struct s3c64xx_spi_driver_data *sdd = data; | |
1291 | struct spi_master *spi = sdd->master; | |
375981f2 | 1292 | unsigned int val, clr = 0; |
c2573128 | 1293 | |
375981f2 | 1294 | val = readl(sdd->regs + S3C64XX_SPI_STATUS); |
c2573128 | 1295 | |
375981f2 G |
1296 | if (val & S3C64XX_SPI_ST_RX_OVERRUN_ERR) { |
1297 | clr = S3C64XX_SPI_PND_RX_OVERRUN_CLR; | |
c2573128 | 1298 | dev_err(&spi->dev, "RX overrun\n"); |
375981f2 G |
1299 | } |
1300 | if (val & S3C64XX_SPI_ST_RX_UNDERRUN_ERR) { | |
1301 | clr |= S3C64XX_SPI_PND_RX_UNDERRUN_CLR; | |
c2573128 | 1302 | dev_err(&spi->dev, "RX underrun\n"); |
375981f2 G |
1303 | } |
1304 | if (val & S3C64XX_SPI_ST_TX_OVERRUN_ERR) { | |
1305 | clr |= S3C64XX_SPI_PND_TX_OVERRUN_CLR; | |
c2573128 | 1306 | dev_err(&spi->dev, "TX overrun\n"); |
375981f2 G |
1307 | } |
1308 | if (val & S3C64XX_SPI_ST_TX_UNDERRUN_ERR) { | |
1309 | clr |= S3C64XX_SPI_PND_TX_UNDERRUN_CLR; | |
c2573128 | 1310 | dev_err(&spi->dev, "TX underrun\n"); |
375981f2 G |
1311 | } |
1312 | ||
1313 | /* Clear the pending irq by setting and then clearing it */ | |
1314 | writel(clr, sdd->regs + S3C64XX_SPI_PENDING_CLR); | |
1315 | writel(0, sdd->regs + S3C64XX_SPI_PENDING_CLR); | |
c2573128 MB |
1316 | |
1317 | return IRQ_HANDLED; | |
1318 | } | |
1319 | ||
230d42d4 JB |
1320 | static void s3c64xx_spi_hwinit(struct s3c64xx_spi_driver_data *sdd, int channel) |
1321 | { | |
ad7de729 | 1322 | struct s3c64xx_spi_info *sci = sdd->cntrlr_info; |
230d42d4 JB |
1323 | void __iomem *regs = sdd->regs; |
1324 | unsigned int val; | |
1325 | ||
1cac41cb MB |
1326 | #ifdef ENABLE_SENSORS_FPRINT_SECURE |
1327 | if (channel == CONFIG_SENSORS_FP_SPI_NUMBER) | |
1328 | return; | |
1329 | #endif | |
1330 | #ifdef CONFIG_ESE_SECURE | |
1331 | if (channel == CONFIG_ESE_SECURE_SPI_PORT) | |
1332 | return; | |
1333 | #endif | |
230d42d4 JB |
1334 | sdd->cur_speed = 0; |
1335 | ||
1cac41cb | 1336 | writel(S3C64XX_SPI_SLAVE_SIG_INACT, sdd->regs + S3C64XX_SPI_SLAVE_SEL); |
230d42d4 JB |
1337 | |
1338 | /* Disable Interrupts - we use Polling if not DMA mode */ | |
1339 | writel(0, regs + S3C64XX_SPI_INT_EN); | |
1340 | ||
a5238e36 | 1341 | if (!sdd->port_conf->clk_from_cmu) |
b42a81ca | 1342 | writel(sci->src_clk_nr << S3C64XX_SPI_CLKSEL_SRCSHFT, |
230d42d4 JB |
1343 | regs + S3C64XX_SPI_CLK_CFG); |
1344 | writel(0, regs + S3C64XX_SPI_MODE_CFG); | |
1345 | writel(0, regs + S3C64XX_SPI_PACKET_CNT); | |
1346 | ||
375981f2 G |
1347 | /* Clear any irq pending bits, should set and clear the bits */ |
1348 | val = S3C64XX_SPI_PND_RX_OVERRUN_CLR | | |
1349 | S3C64XX_SPI_PND_RX_UNDERRUN_CLR | | |
1350 | S3C64XX_SPI_PND_TX_OVERRUN_CLR | | |
1351 | S3C64XX_SPI_PND_TX_UNDERRUN_CLR; | |
1352 | writel(val, regs + S3C64XX_SPI_PENDING_CLR); | |
1353 | writel(0, regs + S3C64XX_SPI_PENDING_CLR); | |
230d42d4 JB |
1354 | |
1355 | writel(0, regs + S3C64XX_SPI_SWAP_CFG); | |
1356 | ||
1357 | val = readl(regs + S3C64XX_SPI_MODE_CFG); | |
1358 | val &= ~S3C64XX_SPI_MODE_4BURST; | |
1359 | val &= ~(S3C64XX_SPI_MAX_TRAILCNT << S3C64XX_SPI_TRAILCNT_OFF); | |
1360 | val |= (S3C64XX_SPI_TRAILCNT << S3C64XX_SPI_TRAILCNT_OFF); | |
1361 | writel(val, regs + S3C64XX_SPI_MODE_CFG); | |
1362 | ||
1363 | flush_fifo(sdd); | |
1cac41cb MB |
1364 | |
1365 | sci->need_hw_init = 0; | |
230d42d4 JB |
1366 | } |
1367 | ||
2b908075 | 1368 | #ifdef CONFIG_OF |
75bf3361 | 1369 | static struct s3c64xx_spi_info *s3c64xx_spi_parse_dt(struct device *dev) |
2b908075 TA |
1370 | { |
1371 | struct s3c64xx_spi_info *sci; | |
1372 | u32 temp; | |
1cac41cb | 1373 | const char *domain; |
2b908075 TA |
1374 | |
1375 | sci = devm_kzalloc(dev, sizeof(*sci), GFP_KERNEL); | |
1cac41cb MB |
1376 | if (!sci) { |
1377 | dev_err(dev, "memory allocation for spi_info failed\n"); | |
2b908075 | 1378 | return ERR_PTR(-ENOMEM); |
1cac41cb MB |
1379 | } |
1380 | ||
1381 | if (of_get_property(dev->of_node, "dma-mode", NULL)) | |
1382 | sci->dma_mode = DMA_MODE; | |
1383 | else | |
1384 | sci->dma_mode = CPU_MODE; | |
1385 | ||
1386 | if (of_get_property(dev->of_node, "swap-mode", NULL)) | |
1387 | sci->swap_mode = SWAP_MODE; | |
1388 | else | |
1389 | sci->swap_mode = NO_SWAP_MODE; | |
1390 | ||
1391 | if (of_get_property(dev->of_node, "secure-mode", NULL)) | |
1392 | sci->secure_mode = SECURE_MODE; | |
1393 | else | |
1394 | sci->secure_mode = NONSECURE_MODE; | |
2b908075 TA |
1395 | |
1396 | if (of_property_read_u32(dev->of_node, "samsung,spi-src-clk", &temp)) { | |
75bf3361 | 1397 | dev_warn(dev, "spi bus clock parent not specified, using clock at index 0 as parent\n"); |
2b908075 TA |
1398 | sci->src_clk_nr = 0; |
1399 | } else { | |
1400 | sci->src_clk_nr = temp; | |
1401 | } | |
1402 | ||
1403 | if (of_property_read_u32(dev->of_node, "num-cs", &temp)) { | |
75bf3361 | 1404 | dev_warn(dev, "number of chip select lines not specified, assuming 1 chip select line\n"); |
2b908075 TA |
1405 | sci->num_cs = 1; |
1406 | } else { | |
1407 | sci->num_cs = temp; | |
1408 | } | |
1409 | ||
1cac41cb MB |
1410 | sci->domain = DOMAIN_TOP; |
1411 | if (!of_property_read_string(dev->of_node, "domain", &domain)) { | |
1412 | if (strncmp(domain, "isp", 3) == 0) | |
1413 | sci->domain = DOMAIN_ISP; | |
1414 | else if (strncmp(domain, "cam1", 4) == 0) | |
1415 | sci->domain = DOMAIN_CAM1; | |
1416 | } | |
1417 | ||
2b908075 TA |
1418 | return sci; |
1419 | } | |
1420 | #else | |
1421 | static struct s3c64xx_spi_info *s3c64xx_spi_parse_dt(struct device *dev) | |
1422 | { | |
8074cf06 | 1423 | return dev_get_platdata(dev); |
2b908075 | 1424 | } |
2b908075 TA |
1425 | #endif |
1426 | ||
1427 | static const struct of_device_id s3c64xx_spi_dt_match[]; | |
1428 | ||
a5238e36 TA |
1429 | static inline struct s3c64xx_spi_port_config *s3c64xx_spi_get_port_config( |
1430 | struct platform_device *pdev) | |
1431 | { | |
2b908075 TA |
1432 | #ifdef CONFIG_OF |
1433 | if (pdev->dev.of_node) { | |
1434 | const struct of_device_id *match; | |
1435 | match = of_match_node(s3c64xx_spi_dt_match, pdev->dev.of_node); | |
1436 | return (struct s3c64xx_spi_port_config *)match->data; | |
1437 | } | |
1438 | #endif | |
a5238e36 TA |
1439 | return (struct s3c64xx_spi_port_config *) |
1440 | platform_get_device_id(pdev)->driver_data; | |
1441 | } | |
1442 | ||
1cac41cb MB |
1443 | #ifdef CONFIG_CPU_IDLE |
1444 | static int s3c64xx_spi_notifier(struct notifier_block *self, | |
1445 | unsigned long cmd, void *v) | |
1446 | { | |
1447 | struct s3c64xx_spi_info *sci; | |
1448 | ||
1449 | switch (cmd) { | |
1450 | case LPA_EXIT: | |
1451 | list_for_each_entry(sci, &drvdata_list, node) | |
1452 | sci->need_hw_init = 1; | |
1453 | break; | |
1454 | } | |
1455 | ||
1456 | return NOTIFY_OK; | |
1457 | } | |
1458 | ||
1459 | static struct notifier_block s3c64xx_spi_notifier_block = { | |
1460 | .notifier_call = s3c64xx_spi_notifier, | |
1461 | }; | |
1462 | #endif /* CONFIG_CPU_IDLE */ | |
1463 | ||
2deff8d6 | 1464 | static int s3c64xx_spi_probe(struct platform_device *pdev) |
230d42d4 | 1465 | { |
2b908075 | 1466 | struct resource *mem_res; |
b5be04d3 | 1467 | struct resource *res; |
230d42d4 | 1468 | struct s3c64xx_spi_driver_data *sdd; |
8074cf06 | 1469 | struct s3c64xx_spi_info *sci = dev_get_platdata(&pdev->dev); |
230d42d4 | 1470 | struct spi_master *master; |
c2573128 | 1471 | int ret, irq; |
a24d850b | 1472 | char clk_name[16]; |
1cac41cb MB |
1473 | int fifosize; |
1474 | ||
1475 | ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(36)); | |
1476 | if (ret) | |
1477 | return ret; | |
230d42d4 | 1478 | |
2b908075 TA |
1479 | if (!sci && pdev->dev.of_node) { |
1480 | sci = s3c64xx_spi_parse_dt(&pdev->dev); | |
1481 | if (IS_ERR(sci)) | |
1482 | return PTR_ERR(sci); | |
230d42d4 JB |
1483 | } |
1484 | ||
2b908075 | 1485 | if (!sci) { |
230d42d4 JB |
1486 | dev_err(&pdev->dev, "platform_data missing!\n"); |
1487 | return -ENODEV; | |
1488 | } | |
1489 | ||
1cac41cb MB |
1490 | #if !defined(CONFIG_VIDEO_EXYNOS_FIMC_IS) && !defined(CONFIG_VIDEO_EXYNOS_FIMC_IS2) |
1491 | if (sci->domain != DOMAIN_TOP) | |
1492 | return -ENODEV; | |
1493 | #endif | |
1494 | ||
230d42d4 JB |
1495 | mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
1496 | if (mem_res == NULL) { | |
1497 | dev_err(&pdev->dev, "Unable to get SPI MEM resource\n"); | |
1498 | return -ENXIO; | |
1499 | } | |
1500 | ||
c2573128 MB |
1501 | irq = platform_get_irq(pdev, 0); |
1502 | if (irq < 0) { | |
1503 | dev_warn(&pdev->dev, "Failed to get IRQ: %d\n", irq); | |
1504 | return irq; | |
1505 | } | |
1506 | ||
230d42d4 JB |
1507 | master = spi_alloc_master(&pdev->dev, |
1508 | sizeof(struct s3c64xx_spi_driver_data)); | |
1509 | if (master == NULL) { | |
1510 | dev_err(&pdev->dev, "Unable to allocate SPI Master\n"); | |
1511 | return -ENOMEM; | |
1512 | } | |
1513 | ||
230d42d4 JB |
1514 | platform_set_drvdata(pdev, master); |
1515 | ||
1516 | sdd = spi_master_get_devdata(master); | |
a5238e36 | 1517 | sdd->port_conf = s3c64xx_spi_get_port_config(pdev); |
230d42d4 JB |
1518 | sdd->master = master; |
1519 | sdd->cntrlr_info = sci; | |
1520 | sdd->pdev = pdev; | |
1521 | sdd->sfr_start = mem_res->start; | |
1cac41cb MB |
1522 | sdd->is_probed = 0; |
1523 | sdd->ops = NULL; | |
1524 | ||
1525 | sdd->idle_ip_index = exynos_get_idle_ip_index(dev_name(&pdev->dev)); | |
1526 | ||
2b908075 TA |
1527 | if (pdev->dev.of_node) { |
1528 | ret = of_alias_get_id(pdev->dev.of_node, "spi"); | |
1529 | if (ret < 0) { | |
75bf3361 JH |
1530 | dev_err(&pdev->dev, "failed to get alias id, errno %d\n", |
1531 | ret); | |
2b908075 TA |
1532 | goto err0; |
1533 | } | |
1cac41cb | 1534 | pdev->id = sdd->port_id = ret; |
2b908075 TA |
1535 | } else { |
1536 | sdd->port_id = pdev->id; | |
1537 | } | |
230d42d4 | 1538 | |
1cac41cb MB |
1539 | if(sdd->port_id >= MAX_SPI_PORTS) { |
1540 | dev_err(&pdev->dev, "the port %d exceeded MAX_SPI_PORTS(%d)\n" | |
1541 | , sdd->port_id, MAX_SPI_PORTS); | |
1542 | goto err0; | |
1543 | } | |
1544 | ||
230d42d4 JB |
1545 | sdd->cur_bpw = 8; |
1546 | ||
1cac41cb MB |
1547 | if (sci->dma_mode == DMA_MODE) { |
1548 | if (!sdd->pdev->dev.of_node) { | |
1549 | res = platform_get_resource(pdev, IORESOURCE_DMA, 0); | |
1550 | if (!res) { | |
1551 | dev_err(&pdev->dev, | |
1552 | "Unable to get SPI tx dma resource\n"); | |
1553 | return -ENXIO; | |
1554 | } | |
7e995556 | 1555 | sdd->tx_dma.dmach = res->start; |
b5be04d3 | 1556 | |
1cac41cb MB |
1557 | res = platform_get_resource(pdev, IORESOURCE_DMA, 1); |
1558 | if (!res) { | |
1559 | dev_err(&pdev->dev, | |
1560 | "Unable to get SPI rx dma resource\n"); | |
1561 | return -ENXIO; | |
1562 | } | |
7e995556 | 1563 | sdd->rx_dma.dmach = res->start; |
1cac41cb | 1564 | } |
2b908075 | 1565 | |
1cac41cb MB |
1566 | sdd->tx_dma.direction = DMA_MEM_TO_DEV; |
1567 | sdd->rx_dma.direction = DMA_DEV_TO_MEM; | |
1568 | } | |
2b908075 TA |
1569 | |
1570 | master->dev.of_node = pdev->dev.of_node; | |
a5238e36 | 1571 | master->bus_num = sdd->port_id; |
230d42d4 | 1572 | master->setup = s3c64xx_spi_setup; |
1c20c200 | 1573 | master->cleanup = s3c64xx_spi_cleanup; |
ad2a99af | 1574 | master->prepare_transfer_hardware = s3c64xx_spi_prepare_transfer; |
1cac41cb | 1575 | master->transfer_one_message = s3c64xx_spi_transfer_one_message; |
ad2a99af | 1576 | master->unprepare_transfer_hardware = s3c64xx_spi_unprepare_transfer; |
230d42d4 JB |
1577 | master->num_chipselect = sci->num_cs; |
1578 | master->dma_alignment = 8; | |
1cac41cb | 1579 | master->bits_per_word_mask = BIT(32 - 1) | BIT(16 - 1) | BIT(8 - 1); |
230d42d4 JB |
1580 | /* the spi->mode bits understood by this driver: */ |
1581 | master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH; | |
1582 | ||
b0ee5605 TR |
1583 | sdd->regs = devm_ioremap_resource(&pdev->dev, mem_res); |
1584 | if (IS_ERR(sdd->regs)) { | |
1585 | ret = PTR_ERR(sdd->regs); | |
4eb77006 | 1586 | goto err0; |
230d42d4 JB |
1587 | } |
1588 | ||
00ab5392 | 1589 | if (sci->cfg_gpio && sci->cfg_gpio()) { |
230d42d4 JB |
1590 | dev_err(&pdev->dev, "Unable to config gpio\n"); |
1591 | ret = -EBUSY; | |
4eb77006 | 1592 | goto err0; |
230d42d4 JB |
1593 | } |
1594 | ||
1595 | /* Setup clocks */ | |
4eb77006 | 1596 | sdd->clk = devm_clk_get(&pdev->dev, "spi"); |
230d42d4 JB |
1597 | if (IS_ERR(sdd->clk)) { |
1598 | dev_err(&pdev->dev, "Unable to acquire clock 'spi'\n"); | |
1599 | ret = PTR_ERR(sdd->clk); | |
00ab5392 | 1600 | goto err0; |
230d42d4 JB |
1601 | } |
1602 | ||
1cac41cb | 1603 | snprintf(clk_name, sizeof(clk_name), "spi_busclk%d", sci->src_clk_nr); |
4eb77006 | 1604 | sdd->src_clk = devm_clk_get(&pdev->dev, clk_name); |
b0d5d6e5 | 1605 | if (IS_ERR(sdd->src_clk)) { |
230d42d4 | 1606 | dev_err(&pdev->dev, |
a24d850b | 1607 | "Unable to acquire clock '%s'\n", clk_name); |
b0d5d6e5 | 1608 | ret = PTR_ERR(sdd->src_clk); |
4eb77006 | 1609 | goto err2; |
230d42d4 | 1610 | } |
1cac41cb MB |
1611 | #ifdef CONFIG_PM |
1612 | pm_runtime_use_autosuspend(&pdev->dev); | |
1613 | pm_runtime_enable(&pdev->dev); | |
1614 | pm_runtime_get_sync(&pdev->dev); | |
1615 | ||
1616 | sdd->pinctrl = devm_pinctrl_get(&pdev->dev); | |
1617 | if (IS_ERR(sdd->pinctrl)) { | |
1618 | dev_warn(&pdev->dev, "Couldn't get pinctrl.\n"); | |
1619 | sdd->pinctrl = NULL; | |
1620 | } | |
1621 | ||
1622 | if (sdd->pinctrl) { | |
1623 | sdd->pin_def = pinctrl_lookup_state(sdd->pinctrl, PINCTRL_STATE_DEFAULT); | |
1624 | if (IS_ERR(sdd->pin_def)) { | |
1625 | dev_warn(&pdev->dev, "Not define default state.\n"); | |
1626 | sdd->pin_def = NULL; | |
1627 | } | |
1628 | ||
1629 | sdd->pin_idle = pinctrl_lookup_state(sdd->pinctrl, PINCTRL_STATE_IDLE); | |
1630 | if (IS_ERR(sdd->pin_idle)) { | |
1631 | dev_info(&pdev->dev, "Not use idle state.\n"); | |
1632 | sdd->pin_idle = NULL; | |
1633 | } | |
1634 | } | |
1635 | #else | |
1636 | ||
1637 | exynos_update_ip_idle_status(sdd->idle_ip_index, 0); | |
1638 | ||
1639 | if (clk_prepare_enable(sdd->clk)) { | |
1640 | dev_err(&pdev->dev, "Couldn't enable clock 'spi'\n"); | |
1641 | ret = -EBUSY; | |
1642 | goto err0; | |
1643 | } | |
230d42d4 | 1644 | |
9f667bff | 1645 | if (clk_prepare_enable(sdd->src_clk)) { |
a24d850b | 1646 | dev_err(&pdev->dev, "Couldn't enable clock '%s'\n", clk_name); |
230d42d4 | 1647 | ret = -EBUSY; |
4eb77006 | 1648 | goto err2; |
230d42d4 | 1649 | } |
1cac41cb | 1650 | #endif |
230d42d4 | 1651 | |
1cac41cb MB |
1652 | if (of_property_read_u32(pdev->dev.of_node, "spi-clkoff-time", |
1653 | (int *)&(sdd->spi_clkoff_time))) { | |
1654 | dev_err(&pdev->dev, "spi clkoff-time is empty(Default: 0ms)\n"); | |
1655 | sdd->spi_clkoff_time = 0; | |
1656 | } else { | |
1657 | dev_err(&pdev->dev, "spi clkoff-time %d\n", sdd->spi_clkoff_time); | |
1658 | } | |
1659 | ||
1660 | if (of_property_read_u32(pdev->dev.of_node, | |
1661 | "samsung,spi-fifosize", &fifosize)) { | |
1662 | dev_err(&pdev->dev, "PORT %d fifosize is not specified\n", | |
1663 | sdd->port_id); | |
1664 | ret = -EINVAL; | |
1665 | goto err3; | |
1666 | } else { | |
1667 | sdd->port_conf->fifo_lvl_mask[sdd->port_id] = (fifosize << 1) - 1; | |
1668 | dev_info(&pdev->dev, "PORT %d fifo_lvl_mask = 0x%x\n", | |
1669 | sdd->port_id, sdd->port_conf->fifo_lvl_mask[sdd->port_id]); | |
1670 | } | |
483867ee | 1671 | |
230d42d4 | 1672 | /* Setup Deufult Mode */ |
a5238e36 | 1673 | s3c64xx_spi_hwinit(sdd, sdd->port_id); |
230d42d4 JB |
1674 | |
1675 | spin_lock_init(&sdd->lock); | |
1676 | init_completion(&sdd->xfer_completion); | |
1cac41cb | 1677 | INIT_LIST_HEAD(&sdd->queue); |
230d42d4 | 1678 | |
4eb77006 JH |
1679 | ret = devm_request_irq(&pdev->dev, irq, s3c64xx_spi_irq, 0, |
1680 | "spi-s3c64xx", sdd); | |
c2573128 MB |
1681 | if (ret != 0) { |
1682 | dev_err(&pdev->dev, "Failed to request IRQ %d: %d\n", | |
1683 | irq, ret); | |
4eb77006 | 1684 | goto err3; |
c2573128 MB |
1685 | } |
1686 | ||
1cac41cb MB |
1687 | if (1 |
1688 | #ifdef ENABLE_SENSORS_FPRINT_SECURE | |
1689 | && (sdd->port_id != CONFIG_SENSORS_FP_SPI_NUMBER) | |
1690 | #endif | |
1691 | #ifdef CONFIG_ESE_SECURE | |
1692 | && (sdd->port_id != CONFIG_ESE_SECURE_SPI_PORT) | |
1693 | #endif | |
1694 | ) { | |
1695 | writel(S3C64XX_SPI_INT_RX_OVERRUN_EN | S3C64XX_SPI_INT_RX_UNDERRUN_EN | | |
1696 | S3C64XX_SPI_INT_TX_OVERRUN_EN | S3C64XX_SPI_INT_TX_UNDERRUN_EN, | |
1697 | sdd->regs + S3C64XX_SPI_INT_EN); | |
1698 | } | |
c2573128 | 1699 | |
1cac41cb MB |
1700 | #ifdef CONFIG_PM |
1701 | pm_runtime_mark_last_busy(&pdev->dev); | |
1702 | pm_runtime_put_sync(&pdev->dev); | |
1703 | #endif | |
1704 | ||
1705 | if (spi_register_master(master)) { | |
1706 | dev_err(&pdev->dev, "cannot register SPI master\n"); | |
1707 | ret = -EBUSY; | |
483867ee | 1708 | goto err3; |
230d42d4 JB |
1709 | } |
1710 | ||
1cac41cb MB |
1711 | list_add_tail(&sci->node, &drvdata_list); |
1712 | ||
1713 | sdd->is_probed = 1; | |
1714 | #ifdef CONFIG_PM | |
1715 | if (sci->domain == DOMAIN_TOP) | |
1716 | pm_runtime_set_autosuspend_delay(&pdev->dev, | |
1717 | sdd->spi_clkoff_time); | |
1718 | else | |
1719 | pm_runtime_set_autosuspend_delay(&pdev->dev, | |
1720 | SPI_AUTOSUSPEND_TIMEOUT); | |
1721 | #endif | |
1722 | ||
75bf3361 | 1723 | dev_dbg(&pdev->dev, "Samsung SoC SPI Driver loaded for Bus SPI-%d with %d Slaves attached\n", |
a5238e36 | 1724 | sdd->port_id, master->num_chipselect); |
1cac41cb | 1725 | dev_dbg(&pdev->dev, "\tIOmem=[%pR]\tFIFO %dbytes\tDMA=[Rx-%ld, Tx-%ld]\n", |
ed425dcf | 1726 | mem_res, (FIFO_LVL_MASK(sdd) >> 1) + 1, |
82ab8cd7 | 1727 | sdd->rx_dma.dmach, sdd->tx_dma.dmach); |
230d42d4 | 1728 | |
1cac41cb MB |
1729 | ret = device_create_file(&pdev->dev, &dev_attr_spi_dbg); |
1730 | if (ret < 0) | |
1731 | dev_err(&pdev->dev, "failed to create sysfs file.\n"); | |
1732 | sci->dbg_mode = 0; | |
483867ee | 1733 | |
230d42d4 JB |
1734 | return 0; |
1735 | ||
483867ee | 1736 | err3: |
1cac41cb | 1737 | #ifdef CONFIG_PM |
3c863792 | 1738 | pm_runtime_disable(&pdev->dev); |
1cac41cb | 1739 | #endif |
9f667bff | 1740 | clk_disable_unprepare(sdd->src_clk); |
4eb77006 | 1741 | err2: |
9f667bff | 1742 | clk_disable_unprepare(sdd->clk); |
230d42d4 | 1743 | err0: |
1cac41cb | 1744 | platform_set_drvdata(pdev, NULL); |
230d42d4 JB |
1745 | spi_master_put(master); |
1746 | ||
1747 | return ret; | |
1748 | } | |
1749 | ||
1750 | static int s3c64xx_spi_remove(struct platform_device *pdev) | |
1751 | { | |
1752 | struct spi_master *master = spi_master_get(platform_get_drvdata(pdev)); | |
1753 | struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master); | |
230d42d4 | 1754 | |
1cac41cb MB |
1755 | #ifdef CONFIG_PM |
1756 | pm_runtime_disable(&pdev->dev); | |
1757 | #endif | |
1758 | ||
1759 | spi_unregister_master(master); | |
b97b6621 | 1760 | |
c2573128 MB |
1761 | writel(0, sdd->regs + S3C64XX_SPI_INT_EN); |
1762 | ||
9f667bff | 1763 | clk_disable_unprepare(sdd->src_clk); |
230d42d4 | 1764 | |
9f667bff | 1765 | clk_disable_unprepare(sdd->clk); |
230d42d4 | 1766 | |
1cac41cb MB |
1767 | exynos_update_ip_idle_status(sdd->idle_ip_index, 1); |
1768 | ||
1769 | platform_set_drvdata(pdev, NULL); | |
1770 | spi_master_put(master); | |
1771 | ||
1772 | return 0; | |
1773 | } | |
1774 | ||
1775 | #ifdef CONFIG_PM | |
1776 | static void s3c64xx_spi_pin_ctrl(struct device *dev, int en) | |
1777 | { | |
1778 | struct spi_master *master = dev_get_drvdata(dev); | |
1779 | struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master); | |
1780 | struct pinctrl_state *pin_stat; | |
1781 | ||
1782 | if (!sdd->pin_idle) | |
1783 | return; | |
1784 | ||
1785 | pin_stat = en ? sdd->pin_def : sdd->pin_idle; | |
1786 | if (!IS_ERR(pin_stat)) { | |
1787 | sdd->pinctrl->state = NULL; | |
1788 | if (pinctrl_select_state(sdd->pinctrl, pin_stat)) | |
1789 | dev_err(dev, "could not set pinctrl.\n"); | |
1790 | } else { | |
1791 | dev_warn(dev, "pinctrl stat is null pointer.\n"); | |
1792 | } | |
1793 | } | |
1794 | ||
1795 | static int s3c64xx_spi_runtime_suspend(struct device *dev) | |
1796 | { | |
1797 | struct spi_master *master = dev_get_drvdata(dev); | |
1798 | struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master); | |
1799 | struct s3c64xx_spi_info *sci = sdd->cntrlr_info; | |
1800 | ||
1801 | if (__clk_get_enable_count(sdd->clk)) | |
1802 | clk_disable_unprepare(sdd->clk); | |
1803 | if (__clk_get_enable_count(sdd->src_clk)) | |
1804 | clk_disable_unprepare(sdd->src_clk); | |
1805 | ||
1806 | exynos_update_ip_idle_status(sdd->idle_ip_index, 1); | |
1807 | ||
1808 | /* Free DMA channels */ | |
1809 | if (sci->dma_mode == DMA_MODE && sdd->is_probed && sdd->ops != NULL) { | |
1810 | #ifdef CONFIG_ARM64 | |
1811 | sdd->ops->release((unsigned long)sdd->rx_dma.ch, | |
1812 | &s3c64xx_spi_dma_client); | |
1813 | sdd->ops->release((unsigned long)sdd->tx_dma.ch, | |
1814 | &s3c64xx_spi_dma_client); | |
1815 | #else | |
1816 | sdd->ops->release((enum dma_ch)sdd->rx_dma.ch, | |
1817 | &s3c64xx_spi_dma_client); | |
1818 | sdd->ops->release((enum dma_ch)sdd->tx_dma.ch, | |
1819 | &s3c64xx_spi_dma_client); | |
1820 | #endif | |
1821 | sdd->rx_dma.ch = NULL; | |
1822 | sdd->tx_dma.ch = NULL; | |
1823 | } | |
1824 | ||
1825 | s3c64xx_spi_pin_ctrl(dev, 0); | |
1826 | ||
1827 | return 0; | |
1828 | } | |
1829 | ||
1830 | static int s3c64xx_spi_runtime_resume(struct device *dev) | |
1831 | { | |
1832 | struct spi_master *master = dev_get_drvdata(dev); | |
1833 | struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master); | |
1834 | struct s3c64xx_spi_info *sci = sdd->cntrlr_info; | |
1835 | ||
1836 | s3c64xx_spi_pin_ctrl(dev, 1); | |
1837 | ||
1838 | if (sci->dma_mode == DMA_MODE && sdd->is_probed) { | |
1839 | /* Acquire DMA channels */ | |
1840 | while (!acquire_dma(sdd)) | |
1841 | usleep_range(10000, 11000); | |
1842 | } | |
1843 | ||
1844 | if (sci->domain == DOMAIN_TOP) { | |
1845 | exynos_update_ip_idle_status(sdd->idle_ip_index, 0); | |
1846 | clk_prepare_enable(sdd->src_clk); | |
1847 | clk_prepare_enable(sdd->clk); | |
1848 | } | |
1849 | ||
1850 | #if defined(CONFIG_VIDEO_EXYNOS_FIMC_IS) || defined(CONFIG_VIDEO_EXYNOS_FIMC_IS2) | |
1851 | else if (sci->domain == DOMAIN_CAM1 || sci->domain == DOMAIN_ISP) { | |
1852 | exynos_update_ip_idle_status(sdd->idle_ip_index, 0); | |
1853 | clk_prepare_enable(sdd->src_clk); | |
1854 | clk_prepare_enable(sdd->clk); | |
1855 | ||
1856 | s3c64xx_spi_hwinit(sdd, sdd->port_id); | |
1857 | } | |
1858 | #endif | |
8ebe9d16 | 1859 | |
230d42d4 JB |
1860 | return 0; |
1861 | } | |
1cac41cb | 1862 | #endif /* CONFIG_PM */ |
230d42d4 | 1863 | |
997230d0 | 1864 | #ifdef CONFIG_PM_SLEEP |
1cac41cb | 1865 | static int s3c64xx_spi_suspend_operation(struct device *dev) |
230d42d4 | 1866 | { |
9a2a5245 | 1867 | struct spi_master *master = dev_get_drvdata(dev); |
230d42d4 | 1868 | struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master); |
1cac41cb MB |
1869 | #ifndef CONFIG_PM |
1870 | struct s3c64xx_spi_info *sci = sdd->cntrlr_info; | |
1871 | #endif | |
230d42d4 | 1872 | |
347de6ba | 1873 | int ret = spi_master_suspend(master); |
1cac41cb MB |
1874 | if (ret) { |
1875 | dev_warn(dev, "cannot suspend master\n"); | |
347de6ba | 1876 | return ret; |
1cac41cb | 1877 | } |
230d42d4 | 1878 | |
1cac41cb MB |
1879 | #ifndef CONFIG_PM |
1880 | if (sci->domain == DOMAIN_TOP) { | |
1881 | /* Disable the clock */ | |
1882 | clk_disable_unprepare(sdd->src_clk); | |
1883 | clk_disable_unprepare(sdd->clk); | |
1884 | exynos_update_ip_idle_status(sdd->idle_ip_index, 1); | |
1885 | } | |
1886 | #endif | |
1887 | if (!pm_runtime_status_suspended(dev)) | |
1888 | s3c64xx_spi_runtime_suspend(dev); | |
230d42d4 JB |
1889 | |
1890 | sdd->cur_speed = 0; /* Output Clock is stopped */ | |
1891 | ||
1892 | return 0; | |
1893 | } | |
1894 | ||
1cac41cb | 1895 | static int s3c64xx_spi_resume_operation(struct device *dev) |
230d42d4 | 1896 | { |
9a2a5245 | 1897 | struct spi_master *master = dev_get_drvdata(dev); |
230d42d4 | 1898 | struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master); |
ad7de729 | 1899 | struct s3c64xx_spi_info *sci = sdd->cntrlr_info; |
4fcd9b9e | 1900 | int ret; |
230d42d4 | 1901 | |
1cac41cb MB |
1902 | if (!pm_runtime_status_suspended(dev)) |
1903 | s3c64xx_spi_runtime_resume(dev); | |
230d42d4 | 1904 | |
1cac41cb MB |
1905 | if (sci->domain == DOMAIN_TOP) { |
1906 | /* Enable the clock */ | |
1907 | exynos_update_ip_idle_status(sdd->idle_ip_index, 0); | |
1908 | clk_prepare_enable(sdd->src_clk); | |
1909 | clk_prepare_enable(sdd->clk); | |
230d42d4 | 1910 | |
1cac41cb MB |
1911 | if (sci->cfg_gpio) |
1912 | sci->cfg_gpio(); | |
230d42d4 | 1913 | |
1cac41cb MB |
1914 | if (sci->secure_mode) |
1915 | sci->need_hw_init = 1; | |
1916 | else | |
1917 | s3c64xx_spi_hwinit(sdd, sdd->port_id); | |
230d42d4 | 1918 | |
ec833050 | 1919 | #ifdef CONFIG_PM |
1cac41cb MB |
1920 | /* Disable the clock */ |
1921 | clk_disable_unprepare(sdd->src_clk); | |
1922 | clk_disable_unprepare(sdd->clk); | |
1923 | exynos_update_ip_idle_status(sdd->idle_ip_index, 1); | |
1924 | #endif | |
1925 | } | |
1926 | ||
1927 | /* Start the queue running */ | |
1928 | ret = spi_master_resume(master); | |
1929 | if (ret) | |
1930 | dev_err(dev, "problem starting queue (%d)\n", ret); | |
1931 | else | |
1932 | dev_dbg(dev, "resumed\n"); | |
1933 | ||
1934 | return ret; | |
1935 | } | |
1936 | ||
1937 | static int s3c64xx_spi_suspend(struct device *dev) | |
b97b6621 | 1938 | { |
9a2a5245 | 1939 | struct spi_master *master = dev_get_drvdata(dev); |
b97b6621 | 1940 | struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master); |
1cac41cb | 1941 | struct s3c64xx_spi_info *sci = sdd->cntrlr_info; |
b97b6621 | 1942 | |
1cac41cb MB |
1943 | if (sci->dma_mode != DMA_MODE) |
1944 | return 0; | |
b97b6621 | 1945 | |
1cac41cb MB |
1946 | dev_dbg(dev, "spi suspend is handled in device suspend, dma mode = %d\n", |
1947 | sci->dma_mode); | |
1948 | return s3c64xx_spi_suspend_operation(dev); | |
b97b6621 MB |
1949 | } |
1950 | ||
1cac41cb | 1951 | static int s3c64xx_spi_suspend_noirq(struct device *dev) |
b97b6621 | 1952 | { |
9a2a5245 | 1953 | struct spi_master *master = dev_get_drvdata(dev); |
b97b6621 | 1954 | struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master); |
1cac41cb | 1955 | struct s3c64xx_spi_info *sci = sdd->cntrlr_info; |
b97b6621 | 1956 | |
1cac41cb MB |
1957 | if (sci->dma_mode == DMA_MODE) |
1958 | return 0; | |
8b06d5b8 | 1959 | |
1cac41cb MB |
1960 | dev_dbg(dev, "spi suspend is handled in suspend_noirq, dma mode = %d\n", |
1961 | sci->dma_mode); | |
1962 | return s3c64xx_spi_suspend_operation(dev); | |
1963 | } | |
1964 | ||
1965 | static int s3c64xx_spi_resume(struct device *dev) | |
1966 | { | |
1967 | struct spi_master *master = dev_get_drvdata(dev); | |
1968 | struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master); | |
1969 | struct s3c64xx_spi_info *sci = sdd->cntrlr_info; | |
1970 | ||
1971 | if (sci->dma_mode != DMA_MODE) | |
1972 | return 0; | |
1973 | ||
1974 | dev_dbg(dev, "spi resume is handled in device resume, dma mode = %d\n", | |
1975 | sci->dma_mode); | |
1976 | return s3c64xx_spi_resume_operation(dev); | |
1977 | } | |
b97b6621 | 1978 | |
1cac41cb MB |
1979 | static int s3c64xx_spi_resume_noirq(struct device *dev) |
1980 | { | |
1981 | struct spi_master *master = dev_get_drvdata(dev); | |
1982 | struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master); | |
1983 | struct s3c64xx_spi_info *sci = sdd->cntrlr_info; | |
1984 | ||
1985 | if (sci->dma_mode == DMA_MODE) | |
1986 | return 0; | |
1987 | ||
1988 | dev_dbg(dev, "spi resume is handled in resume_noirq, dma mode = %d\n", | |
1989 | sci->dma_mode); | |
1990 | return s3c64xx_spi_resume_operation(dev); | |
1991 | } | |
1992 | #else | |
1993 | static int s3c64xx_spi_suspend(struct device *dev) | |
1994 | { | |
b97b6621 MB |
1995 | return 0; |
1996 | } | |
1cac41cb MB |
1997 | |
1998 | static int s3c64xx_spi_resume(struct device *dev) | |
1999 | { | |
2000 | return 0; | |
2001 | } | |
2002 | #endif /* CONFIG_PM_SLEEP */ | |
b97b6621 | 2003 | |
e25d0bf9 MB |
2004 | static const struct dev_pm_ops s3c64xx_spi_pm = { |
2005 | SET_SYSTEM_SLEEP_PM_OPS(s3c64xx_spi_suspend, s3c64xx_spi_resume) | |
1cac41cb | 2006 | SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(s3c64xx_spi_suspend_noirq, s3c64xx_spi_resume_noirq) |
b97b6621 MB |
2007 | SET_RUNTIME_PM_OPS(s3c64xx_spi_runtime_suspend, |
2008 | s3c64xx_spi_runtime_resume, NULL) | |
e25d0bf9 MB |
2009 | }; |
2010 | ||
10ce0473 | 2011 | static struct s3c64xx_spi_port_config s3c2443_spi_port_config = { |
a5238e36 TA |
2012 | .fifo_lvl_mask = { 0x7f }, |
2013 | .rx_lvl_offset = 13, | |
2014 | .tx_st_done = 21, | |
2015 | .high_speed = true, | |
2016 | }; | |
2017 | ||
10ce0473 | 2018 | static struct s3c64xx_spi_port_config s3c6410_spi_port_config = { |
a5238e36 TA |
2019 | .fifo_lvl_mask = { 0x7f, 0x7F }, |
2020 | .rx_lvl_offset = 13, | |
2021 | .tx_st_done = 21, | |
2022 | }; | |
2023 | ||
10ce0473 | 2024 | static struct s3c64xx_spi_port_config s5pv210_spi_port_config = { |
a5238e36 TA |
2025 | .fifo_lvl_mask = { 0x1ff, 0x7F }, |
2026 | .rx_lvl_offset = 15, | |
2027 | .tx_st_done = 25, | |
2028 | .high_speed = true, | |
2029 | }; | |
2030 | ||
10ce0473 | 2031 | static struct s3c64xx_spi_port_config exynos4_spi_port_config = { |
a5238e36 TA |
2032 | .fifo_lvl_mask = { 0x1ff, 0x7F, 0x7F }, |
2033 | .rx_lvl_offset = 15, | |
2034 | .tx_st_done = 25, | |
2035 | .high_speed = true, | |
2036 | .clk_from_cmu = true, | |
2037 | }; | |
2038 | ||
1cac41cb MB |
2039 | static struct s3c64xx_spi_port_config exynos5_spi_port_config = { |
2040 | .fifo_lvl_mask = { 0x1ff, 0x7F, 0x7F, 0x1ff, 0x1ff }, | |
2041 | .rx_lvl_offset = 15, | |
2042 | .tx_st_done = 25, | |
2043 | .high_speed = true, | |
2044 | .clk_from_cmu = true, | |
2045 | }; | |
2046 | ||
2047 | static struct s3c64xx_spi_port_config exynos543x_spi_port_config = { | |
2048 | .fifo_lvl_mask = { 0x1ff, 0x7F, 0x7F, 0x7F, 0x7F, 0x1ff, 0x1ff }, | |
2049 | .rx_lvl_offset = 15, | |
2050 | .tx_st_done = 25, | |
2051 | .high_speed = true, | |
2052 | .clk_from_cmu = true, | |
2053 | }; | |
2054 | ||
2055 | static struct s3c64xx_spi_port_config exynos742x_spi_port_config = { | |
2056 | .fifo_lvl_mask = { 0x1ff, 0x7F, 0x7F, 0x7F, 0x7F, 0x1ff, 0x1ff, 0x1ff }, | |
bff82038 G |
2057 | .rx_lvl_offset = 15, |
2058 | .tx_st_done = 25, | |
2059 | .high_speed = true, | |
2060 | .clk_from_cmu = true, | |
bff82038 G |
2061 | }; |
2062 | ||
1cac41cb MB |
2063 | static struct s3c64xx_spi_port_config exynos758x_spi_port_config = { |
2064 | .fifo_lvl_mask = { 0x1ff, 0x7F, 0x7F, 0x1ff, 0x1ff }, | |
2065 | .rx_lvl_offset = 15, | |
2066 | .tx_st_done = 25, | |
2067 | .high_speed = true, | |
2068 | .clk_from_cmu = true, | |
2069 | }; | |
2070 | ||
2071 | static struct s3c64xx_spi_port_config exynos_spi_port_config = { | |
2072 | .fifo_lvl_mask = { 0, }, | |
bf77cba9 PV |
2073 | .rx_lvl_offset = 15, |
2074 | .tx_st_done = 25, | |
2075 | .high_speed = true, | |
2076 | .clk_from_cmu = true, | |
bf77cba9 PV |
2077 | }; |
2078 | ||
23f6d39e | 2079 | static const struct platform_device_id s3c64xx_spi_driver_ids[] = { |
a5238e36 TA |
2080 | { |
2081 | .name = "s3c2443-spi", | |
2082 | .driver_data = (kernel_ulong_t)&s3c2443_spi_port_config, | |
2083 | }, { | |
2084 | .name = "s3c6410-spi", | |
2085 | .driver_data = (kernel_ulong_t)&s3c6410_spi_port_config, | |
a5238e36 TA |
2086 | }, { |
2087 | .name = "s5pv210-spi", | |
2088 | .driver_data = (kernel_ulong_t)&s5pv210_spi_port_config, | |
2089 | }, { | |
2090 | .name = "exynos4210-spi", | |
2091 | .driver_data = (kernel_ulong_t)&exynos4_spi_port_config, | |
1cac41cb MB |
2092 | }, { |
2093 | .name = "exynos5410-spi", | |
2094 | .driver_data = (kernel_ulong_t)&exynos5_spi_port_config, | |
2095 | }, { | |
2096 | .name = "exynos543x-spi", | |
2097 | .driver_data = (kernel_ulong_t)&exynos543x_spi_port_config, | |
2098 | }, { | |
2099 | .name = "exynos742x-spi", | |
2100 | .driver_data = (kernel_ulong_t)&exynos742x_spi_port_config, | |
2101 | }, { | |
2102 | .name = "exynos758x-spi", | |
2103 | .driver_data = (kernel_ulong_t)&exynos758x_spi_port_config, | |
2104 | }, { | |
2105 | .name = "exynos-spi", | |
2106 | .driver_data = (kernel_ulong_t)&exynos_spi_port_config, | |
a5238e36 TA |
2107 | }, |
2108 | { }, | |
2109 | }; | |
2110 | ||
1cac41cb | 2111 | #ifdef CONFIG_OF |
2b908075 | 2112 | static const struct of_device_id s3c64xx_spi_dt_match[] = { |
1cac41cb MB |
2113 | { .compatible = "samsung,exynos4210-spi", |
2114 | .data = (void *)&exynos4_spi_port_config, | |
a3b924df | 2115 | }, |
1cac41cb MB |
2116 | { .compatible = "samsung,exynos5410-spi", |
2117 | .data = (void *)&exynos5_spi_port_config, | |
a3b924df | 2118 | }, |
1cac41cb MB |
2119 | { .compatible = "samsung,exynos543x-spi", |
2120 | .data = (void *)&exynos543x_spi_port_config, | |
a3b924df | 2121 | }, |
1cac41cb MB |
2122 | { .compatible = "samsung,exynos742x-spi", |
2123 | .data = (void *)&exynos742x_spi_port_config, | |
2b908075 | 2124 | }, |
1cac41cb MB |
2125 | { .compatible = "samsung,exynos758x-spi", |
2126 | .data = (void *)&exynos758x_spi_port_config, | |
bff82038 | 2127 | }, |
1cac41cb MB |
2128 | { .compatible = "samsung,exynos-spi", |
2129 | .data = (void *)&exynos_spi_port_config, | |
bf77cba9 | 2130 | }, |
2b908075 TA |
2131 | { }, |
2132 | }; | |
2133 | MODULE_DEVICE_TABLE(of, s3c64xx_spi_dt_match); | |
1cac41cb | 2134 | #endif /* CONFIG_OF */ |
2b908075 | 2135 | |
230d42d4 JB |
2136 | static struct platform_driver s3c64xx_spi_driver = { |
2137 | .driver = { | |
2138 | .name = "s3c64xx-spi", | |
e25d0bf9 | 2139 | .pm = &s3c64xx_spi_pm, |
2b908075 | 2140 | .of_match_table = of_match_ptr(s3c64xx_spi_dt_match), |
230d42d4 JB |
2141 | }, |
2142 | .remove = s3c64xx_spi_remove, | |
a5238e36 | 2143 | .id_table = s3c64xx_spi_driver_ids, |
230d42d4 JB |
2144 | }; |
2145 | MODULE_ALIAS("platform:s3c64xx-spi"); | |
2146 | ||
1cac41cb MB |
2147 | static int __init s3c64xx_spi_init(void) |
2148 | { | |
2149 | #ifdef CONFIG_CPU_IDLE | |
2150 | exynos_pm_register_notifier(&s3c64xx_spi_notifier_block); | |
2151 | #endif | |
2152 | return platform_driver_probe(&s3c64xx_spi_driver, s3c64xx_spi_probe); | |
2153 | } | |
2154 | subsys_initcall(s3c64xx_spi_init); | |
2155 | ||
2156 | static void __exit s3c64xx_spi_exit(void) | |
2157 | { | |
2158 | platform_driver_unregister(&s3c64xx_spi_driver); | |
2159 | } | |
2160 | module_exit(s3c64xx_spi_exit); | |
230d42d4 JB |
2161 | |
2162 | MODULE_AUTHOR("Jaswinder Singh <jassi.brar@samsung.com>"); | |
2163 | MODULE_DESCRIPTION("S3C64XX SPI Controller Driver"); | |
2164 | MODULE_LICENSE("GPL"); |